From 69c9830d288d5b8d7f0abe7c8a65a4c966580a49 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 17 Sep 2015 00:48:57 -0700
Subject: [PATCH 001/896] [MINOR] [CORE] Fixes minor variable name typo

Author: Cheng Lian <lian@databricks.com>

Closes #8784 from liancheng/typo-fix.
---
 .../apache/spark/serializer/GenericAvroSerializerSuite.scala  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/serializer/GenericAvroSerializerSuite.scala b/core/src/test/scala/org/apache/spark/serializer/GenericAvroSerializerSuite.scala
index bc9f3708ed69..87f25e7245e1 100644
--- a/core/src/test/scala/org/apache/spark/serializer/GenericAvroSerializerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/serializer/GenericAvroSerializerSuite.scala
@@ -76,9 +76,9 @@ class GenericAvroSerializerSuite extends SparkFunSuite with SharedSparkContext {
   test("caches previously seen schemas") {
     val genericSer = new GenericAvroSerializer(conf.getAvroSchema)
     val compressedSchema = genericSer.compress(schema)
-    val decompressedScheam = genericSer.decompress(ByteBuffer.wrap(compressedSchema))
+    val decompressedSchema = genericSer.decompress(ByteBuffer.wrap(compressedSchema))
 
     assert(compressedSchema.eq(genericSer.compress(schema)))
-    assert(decompressedScheam.eq(genericSer.decompress(ByteBuffer.wrap(compressedSchema))))
+    assert(decompressedSchema.eq(genericSer.decompress(ByteBuffer.wrap(compressedSchema))))
   }
 }

From c633ed3260140f1288f326acc4d7a10dcd2e27d5 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:43:59 -0700
Subject: [PATCH 002/896] [SPARK-10284] [ML] [PYSPARK] [DOCS] Add @since
 annotation to pyspark.ml.tuning

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8694 from yu-iskw/SPARK-10284.
---
 python/pyspark/ml/tuning.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/python/pyspark/ml/tuning.py b/python/pyspark/ml/tuning.py
index cae778869e9c..ab5621f45c72 100644
--- a/python/pyspark/ml/tuning.py
+++ b/python/pyspark/ml/tuning.py
@@ -18,6 +18,7 @@
 import itertools
 import numpy as np
 
+from pyspark import since
 from pyspark.ml.param import Params, Param
 from pyspark.ml import Estimator, Model
 from pyspark.ml.util import keyword_only
@@ -47,11 +48,14 @@ class ParamGridBuilder(object):
     True
     >>> all([m in expected for m in output])
     True
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self):
         self._param_grid = {}
 
+    @since("1.4.0")
     def addGrid(self, param, values):
         """
         Sets the given parameters in this grid to fixed values.
@@ -60,6 +64,7 @@ def addGrid(self, param, values):
 
         return self
 
+    @since("1.4.0")
     def baseOn(self, *args):
         """
         Sets the given parameters in this grid to fixed values.
@@ -73,6 +78,7 @@ def baseOn(self, *args):
 
         return self
 
+    @since("1.4.0")
     def build(self):
         """
         Builds and returns all combinations of parameters specified
@@ -104,6 +110,8 @@ class CrossValidator(Estimator):
     >>> cvModel = cv.fit(dataset)
     >>> evaluator.evaluate(cvModel.transform(dataset))
     0.8333...
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -142,6 +150,7 @@ def __init__(self, estimator=None, estimatorParamMaps=None, evaluator=None, numF
         self._set(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, estimator=None, estimatorParamMaps=None, evaluator=None, numFolds=3):
         """
         setParams(self, estimator=None, estimatorParamMaps=None, evaluator=None, numFolds=3):
@@ -150,6 +159,7 @@ def setParams(self, estimator=None, estimatorParamMaps=None, evaluator=None, num
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setEstimator(self, value):
         """
         Sets the value of :py:attr:`estimator`.
@@ -157,12 +167,14 @@ def setEstimator(self, value):
         self._paramMap[self.estimator] = value
         return self
 
+    @since("1.4.0")
     def getEstimator(self):
         """
         Gets the value of estimator or its default value.
         """
         return self.getOrDefault(self.estimator)
 
+    @since("1.4.0")
     def setEstimatorParamMaps(self, value):
         """
         Sets the value of :py:attr:`estimatorParamMaps`.
@@ -170,12 +182,14 @@ def setEstimatorParamMaps(self, value):
         self._paramMap[self.estimatorParamMaps] = value
         return self
 
+    @since("1.4.0")
     def getEstimatorParamMaps(self):
         """
         Gets the value of estimatorParamMaps or its default value.
         """
         return self.getOrDefault(self.estimatorParamMaps)
 
+    @since("1.4.0")
     def setEvaluator(self, value):
         """
         Sets the value of :py:attr:`evaluator`.
@@ -183,12 +197,14 @@ def setEvaluator(self, value):
         self._paramMap[self.evaluator] = value
         return self
 
+    @since("1.4.0")
     def getEvaluator(self):
         """
         Gets the value of evaluator or its default value.
         """
         return self.getOrDefault(self.evaluator)
 
+    @since("1.4.0")
     def setNumFolds(self, value):
         """
         Sets the value of :py:attr:`numFolds`.
@@ -196,6 +212,7 @@ def setNumFolds(self, value):
         self._paramMap[self.numFolds] = value
         return self
 
+    @since("1.4.0")
     def getNumFolds(self):
         """
         Gets the value of numFolds or its default value.
@@ -231,7 +248,15 @@ def _fit(self, dataset):
         bestModel = est.fit(dataset, epm[bestIndex])
         return CrossValidatorModel(bestModel)
 
+    @since("1.4.0")
     def copy(self, extra=None):
+        """
+        Creates a copy of this instance with a randomly generated uid
+        and some extra params. This copies creates a deep copy of
+        the embedded paramMap, and copies the embedded and extra parameters over.
+        :param extra: Extra parameters to copy to the new instance
+        :return: Copy of this instance
+        """
         if extra is None:
             extra = dict()
         newCV = Params.copy(self, extra)
@@ -246,6 +271,8 @@ def copy(self, extra=None):
 class CrossValidatorModel(Model):
     """
     Model from k-fold cross validation.
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, bestModel):
@@ -256,6 +283,7 @@ def __init__(self, bestModel):
     def _transform(self, dataset):
         return self.bestModel.transform(dataset)
 
+    @since("1.4.0")
     def copy(self, extra=None):
         """
         Creates a copy of this instance with a randomly generated uid

From 29bf8aa5a51fdd8c2600533297f991e14fa27c03 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:45:20 -0700
Subject: [PATCH 003/896] [SPARK-10283] [ML] [PYSPARK] [DOCS] Add @since
 annotation to pyspark.ml.regression

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8693 from yu-iskw/SPARK-10283.
---
 python/pyspark/ml/regression.py | 65 +++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index a9503608b7f2..21d454f9003b 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -15,6 +15,7 @@
 # limitations under the License.
 #
 
+from pyspark import since
 from pyspark.ml.util import keyword_only
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
 from pyspark.ml.param.shared import *
@@ -62,6 +63,8 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
     Traceback (most recent call last):
         ...
     TypeError: Method setParams forces keyword arguments.
+
+    .. versionadded:: 1.4.0
     """
 
     @keyword_only
@@ -81,6 +84,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
                   standardization=True):
@@ -96,13 +100,31 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return LinearRegressionModel(java_model)
 
+    @since("1.4.0")
+    def setElasticNetParam(self, value):
+        """
+        Sets the value of :py:attr:`elasticNetParam`.
+        """
+        self._paramMap[self.elasticNetParam] = value
+        return self
+
+    @since("1.4.0")
+    def getElasticNetParam(self):
+        """
+        Gets the value of elasticNetParam or its default value.
+        """
+        return self.getOrDefault(self.elasticNetParam)
+
 
 class LinearRegressionModel(JavaModel):
     """
     Model fitted by LinearRegression.
+
+    .. versionadded:: 1.4.0
     """
 
     @property
+    @since("1.4.0")
     def weights(self):
         """
         Model weights.
@@ -110,6 +132,7 @@ def weights(self):
         return self._call_java("weights")
 
     @property
+    @since("1.4.0")
     def intercept(self):
         """
         Model intercept.
@@ -162,6 +185,8 @@ class DecisionTreeRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredi
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -193,6 +218,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                   maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
@@ -209,6 +235,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return DecisionTreeRegressionModel(java_model)
 
+    @since("1.4.0")
     def setImpurity(self, value):
         """
         Sets the value of :py:attr:`impurity`.
@@ -216,6 +243,7 @@ def setImpurity(self, value):
         self._paramMap[self.impurity] = value
         return self
 
+    @since("1.4.0")
     def getImpurity(self):
         """
         Gets the value of impurity or its default value.
@@ -225,13 +253,19 @@ def getImpurity(self):
 
 @inherit_doc
 class DecisionTreeModel(JavaModel):
+    """Abstraction for Decision Tree models.
+
+    .. versionadded:: 1.5.0
+    """
 
     @property
+    @since("1.5.0")
     def numNodes(self):
         """Return number of nodes of the decision tree."""
         return self._call_java("numNodes")
 
     @property
+    @since("1.5.0")
     def depth(self):
         """Return depth of the decision tree."""
         return self._call_java("depth")
@@ -242,8 +276,13 @@ def __repr__(self):
 
 @inherit_doc
 class TreeEnsembleModels(JavaModel):
+    """Represents a tree ensemble model.
+
+    .. versionadded:: 1.5.0
+    """
 
     @property
+    @since("1.5.0")
     def treeWeights(self):
         """Return the weights for each tree"""
         return list(self._call_java("javaTreeWeights"))
@@ -256,6 +295,8 @@ def __repr__(self):
 class DecisionTreeRegressionModel(DecisionTreeModel):
     """
     Model fitted by DecisionTreeRegressor.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -282,6 +323,8 @@ class RandomForestRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredi
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     0.5
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -336,6 +379,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                   maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
@@ -353,6 +397,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return RandomForestRegressionModel(java_model)
 
+    @since("1.4.0")
     def setImpurity(self, value):
         """
         Sets the value of :py:attr:`impurity`.
@@ -360,12 +405,14 @@ def setImpurity(self, value):
         self._paramMap[self.impurity] = value
         return self
 
+    @since("1.4.0")
     def getImpurity(self):
         """
         Gets the value of impurity or its default value.
         """
         return self.getOrDefault(self.impurity)
 
+    @since("1.4.0")
     def setSubsamplingRate(self, value):
         """
         Sets the value of :py:attr:`subsamplingRate`.
@@ -373,12 +420,14 @@ def setSubsamplingRate(self, value):
         self._paramMap[self.subsamplingRate] = value
         return self
 
+    @since("1.4.0")
     def getSubsamplingRate(self):
         """
         Gets the value of subsamplingRate or its default value.
         """
         return self.getOrDefault(self.subsamplingRate)
 
+    @since("1.4.0")
     def setNumTrees(self, value):
         """
         Sets the value of :py:attr:`numTrees`.
@@ -386,12 +435,14 @@ def setNumTrees(self, value):
         self._paramMap[self.numTrees] = value
         return self
 
+    @since("1.4.0")
     def getNumTrees(self):
         """
         Gets the value of numTrees or its default value.
         """
         return self.getOrDefault(self.numTrees)
 
+    @since("1.4.0")
     def setFeatureSubsetStrategy(self, value):
         """
         Sets the value of :py:attr:`featureSubsetStrategy`.
@@ -399,6 +450,7 @@ def setFeatureSubsetStrategy(self, value):
         self._paramMap[self.featureSubsetStrategy] = value
         return self
 
+    @since("1.4.0")
     def getFeatureSubsetStrategy(self):
         """
         Gets the value of featureSubsetStrategy or its default value.
@@ -409,6 +461,8 @@ def getFeatureSubsetStrategy(self):
 class RandomForestRegressionModel(TreeEnsembleModels):
     """
     Model fitted by RandomForestRegressor.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -435,6 +489,8 @@ class GBTRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -481,6 +537,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                   maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
@@ -498,6 +555,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return GBTRegressionModel(java_model)
 
+    @since("1.4.0")
     def setLossType(self, value):
         """
         Sets the value of :py:attr:`lossType`.
@@ -505,12 +563,14 @@ def setLossType(self, value):
         self._paramMap[self.lossType] = value
         return self
 
+    @since("1.4.0")
     def getLossType(self):
         """
         Gets the value of lossType or its default value.
         """
         return self.getOrDefault(self.lossType)
 
+    @since("1.4.0")
     def setSubsamplingRate(self, value):
         """
         Sets the value of :py:attr:`subsamplingRate`.
@@ -518,12 +578,14 @@ def setSubsamplingRate(self, value):
         self._paramMap[self.subsamplingRate] = value
         return self
 
+    @since("1.4.0")
     def getSubsamplingRate(self):
         """
         Gets the value of subsamplingRate or its default value.
         """
         return self.getOrDefault(self.subsamplingRate)
 
+    @since("1.4.0")
     def setStepSize(self, value):
         """
         Sets the value of :py:attr:`stepSize`.
@@ -531,6 +593,7 @@ def setStepSize(self, value):
         self._paramMap[self.stepSize] = value
         return self
 
+    @since("1.4.0")
     def getStepSize(self):
         """
         Gets the value of stepSize or its default value.
@@ -541,6 +604,8 @@ def getStepSize(self):
 class GBTRegressionModel(TreeEnsembleModels):
     """
     Model fitted by GBTRegressor.
+
+    .. versionadded:: 1.4.0
     """
 
 

From 0ded87a4d49d4484e202bd2ec781821b57b5882c Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:47:21 -0700
Subject: [PATCH 004/896] [SPARK-10281] [ML] [PYSPARK] [DOCS] Add @since
 annotation to pyspark.ml.clustering

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8691 from yu-iskw/SPARK-10281.
---
 python/pyspark/ml/clustering.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/python/pyspark/ml/clustering.py b/python/pyspark/ml/clustering.py
index cb4c16e25a7a..7bb8ab94e17d 100644
--- a/python/pyspark/ml/clustering.py
+++ b/python/pyspark/ml/clustering.py
@@ -15,6 +15,7 @@
 # limitations under the License.
 #
 
+from pyspark import since
 from pyspark.ml.util import keyword_only
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
 from pyspark.ml.param.shared import *
@@ -26,8 +27,11 @@
 class KMeansModel(JavaModel):
     """
     Model fitted by KMeans.
+
+    .. versionadded:: 1.5.0
     """
 
+    @since("1.5.0")
     def clusterCenters(self):
         """Get the cluster centers, represented as a list of NumPy arrays."""
         return [c.toArray() for c in self._call_java("clusterCenters")]
@@ -55,6 +59,8 @@ class KMeans(JavaEstimator, HasFeaturesCol, HasPredictionCol, HasMaxIter, HasTol
     True
     >>> rows[2].prediction == rows[3].prediction
     True
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -88,6 +94,7 @@ def _create_model(self, java_model):
         return KMeansModel(java_model)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, featuresCol="features", predictionCol="prediction", k=2,
                   initMode="k-means||", initSteps=5, tol=1e-4, maxIter=20, seed=None):
         """
@@ -99,6 +106,7 @@ def setParams(self, featuresCol="features", predictionCol="prediction", k=2,
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.5.0")
     def setK(self, value):
         """
         Sets the value of :py:attr:`k`.
@@ -110,12 +118,14 @@ def setK(self, value):
         self._paramMap[self.k] = value
         return self
 
+    @since("1.5.0")
     def getK(self):
         """
         Gets the value of `k`
         """
         return self.getOrDefault(self.k)
 
+    @since("1.5.0")
     def setInitMode(self, value):
         """
         Sets the value of :py:attr:`initMode`.
@@ -130,12 +140,14 @@ def setInitMode(self, value):
         self._paramMap[self.initMode] = value
         return self
 
+    @since("1.5.0")
     def getInitMode(self):
         """
         Gets the value of `initMode`
         """
         return self.getOrDefault(self.initMode)
 
+    @since("1.5.0")
     def setInitSteps(self, value):
         """
         Sets the value of :py:attr:`initSteps`.
@@ -147,6 +159,7 @@ def setInitSteps(self, value):
         self._paramMap[self.initSteps] = value
         return self
 
+    @since("1.5.0")
     def getInitSteps(self):
         """
         Gets the value of `initSteps`

From 39b44cb52eb225469eb4ccdf696f0bc6405b9184 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:48:45 -0700
Subject: [PATCH 005/896] [SPARK-10278] [MLLIB] [PYSPARK] Add @since annotation
 to pyspark.mllib.tree

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8685 from yu-iskw/SPARK-10278.
---
 python/pyspark/mllib/tree.py | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/mllib/tree.py b/python/pyspark/mllib/tree.py
index 372b86a7c95d..0001b60093a6 100644
--- a/python/pyspark/mllib/tree.py
+++ b/python/pyspark/mllib/tree.py
@@ -19,7 +19,7 @@
 
 import random
 
-from pyspark import SparkContext, RDD
+from pyspark import SparkContext, RDD, since
 from pyspark.mllib.common import callMLlibFunc, inherit_doc, JavaModelWrapper
 from pyspark.mllib.linalg import _convert_to_vector
 from pyspark.mllib.regression import LabeledPoint
@@ -30,6 +30,11 @@
 
 
 class TreeEnsembleModel(JavaModelWrapper, JavaSaveable):
+    """TreeEnsembleModel
+
+    .. versionadded:: 1.3.0
+    """
+    @since("1.3.0")
     def predict(self, x):
         """
         Predict values for a single data point or an RDD of points using
@@ -45,12 +50,14 @@ def predict(self, x):
         else:
             return self.call("predict", _convert_to_vector(x))
 
+    @since("1.3.0")
     def numTrees(self):
         """
         Get number of trees in ensemble.
         """
         return self.call("numTrees")
 
+    @since("1.3.0")
     def totalNumNodes(self):
         """
         Get total number of nodes, summed over all trees in the
@@ -62,6 +69,7 @@ def __repr__(self):
         """ Summary of model """
         return self._java_model.toString()
 
+    @since("1.3.0")
     def toDebugString(self):
         """ Full model """
         return self._java_model.toDebugString()
@@ -72,7 +80,10 @@ class DecisionTreeModel(JavaModelWrapper, JavaSaveable, JavaLoader):
     .. note:: Experimental
 
     A decision tree model for classification or regression.
+
+    .. versionadded:: 1.1.0
     """
+    @since("1.1.0")
     def predict(self, x):
         """
         Predict the label of one or more examples.
@@ -90,16 +101,23 @@ def predict(self, x):
         else:
             return self.call("predict", _convert_to_vector(x))
 
+    @since("1.1.0")
     def numNodes(self):
+        """Get number of nodes in tree, including leaf nodes."""
         return self._java_model.numNodes()
 
+    @since("1.1.0")
     def depth(self):
+        """Get depth of tree.
+        E.g.: Depth 0 means 1 leaf node.  Depth 1 means 1 internal node and 2 leaf nodes.
+        """
         return self._java_model.depth()
 
     def __repr__(self):
         """ summary of model. """
         return self._java_model.toString()
 
+    @since("1.2.0")
     def toDebugString(self):
         """ full model. """
         return self._java_model.toDebugString()
@@ -115,6 +133,8 @@ class DecisionTree(object):
 
     Learning algorithm for a decision tree model for classification or
     regression.
+
+    .. versionadded:: 1.1.0
     """
 
     @classmethod
@@ -127,6 +147,7 @@ def _train(cls, data, type, numClasses, features, impurity="gini", maxDepth=5, m
         return DecisionTreeModel(model)
 
     @classmethod
+    @since("1.1.0")
     def trainClassifier(cls, data, numClasses, categoricalFeaturesInfo,
                         impurity="gini", maxDepth=5, maxBins=32, minInstancesPerNode=1,
                         minInfoGain=0.0):
@@ -185,6 +206,7 @@ def trainClassifier(cls, data, numClasses, categoricalFeaturesInfo,
                           impurity, maxDepth, maxBins, minInstancesPerNode, minInfoGain)
 
     @classmethod
+    @since("1.1.0")
     def trainRegressor(cls, data, categoricalFeaturesInfo,
                        impurity="variance", maxDepth=5, maxBins=32, minInstancesPerNode=1,
                        minInfoGain=0.0):
@@ -239,6 +261,8 @@ class RandomForestModel(TreeEnsembleModel, JavaLoader):
     .. note:: Experimental
 
     Represents a random forest model.
+
+    .. versionadded:: 1.2.0
     """
 
     @classmethod
@@ -252,6 +276,8 @@ class RandomForest(object):
 
     Learning algorithm for a random forest model for classification or
     regression.
+
+    .. versionadded:: 1.2.0
     """
 
     supportedFeatureSubsetStrategies = ("auto", "all", "sqrt", "log2", "onethird")
@@ -271,6 +297,7 @@ def _train(cls, data, algo, numClasses, categoricalFeaturesInfo, numTrees,
         return RandomForestModel(model)
 
     @classmethod
+    @since("1.2.0")
     def trainClassifier(cls, data, numClasses, categoricalFeaturesInfo, numTrees,
                         featureSubsetStrategy="auto", impurity="gini", maxDepth=4, maxBins=32,
                         seed=None):
@@ -352,6 +379,7 @@ def trainClassifier(cls, data, numClasses, categoricalFeaturesInfo, numTrees,
                           maxDepth, maxBins, seed)
 
     @classmethod
+    @since("1.2.0")
     def trainRegressor(cls, data, categoricalFeaturesInfo, numTrees, featureSubsetStrategy="auto",
                        impurity="variance", maxDepth=4, maxBins=32, seed=None):
         """
@@ -418,6 +446,8 @@ class GradientBoostedTreesModel(TreeEnsembleModel, JavaLoader):
     .. note:: Experimental
 
     Represents a gradient-boosted tree model.
+
+    .. versionadded:: 1.3.0
     """
 
     @classmethod
@@ -431,6 +461,8 @@ class GradientBoostedTrees(object):
 
     Learning algorithm for a gradient boosted trees model for
     classification or regression.
+
+    .. versionadded:: 1.3.0
     """
 
     @classmethod
@@ -443,6 +475,7 @@ def _train(cls, data, algo, categoricalFeaturesInfo,
         return GradientBoostedTreesModel(model)
 
     @classmethod
+    @since("1.3.0")
     def trainClassifier(cls, data, categoricalFeaturesInfo,
                         loss="logLoss", numIterations=100, learningRate=0.1, maxDepth=3,
                         maxBins=32):
@@ -505,6 +538,7 @@ def trainClassifier(cls, data, categoricalFeaturesInfo,
                           loss, numIterations, learningRate, maxDepth, maxBins)
 
     @classmethod
+    @since("1.3.0")
     def trainRegressor(cls, data, categoricalFeaturesInfo,
                        loss="leastSquaresError", numIterations=100, learningRate=0.1, maxDepth=3,
                        maxBins=32):

From 4a0b56e8dbb3713b16e58738201d838ffc4b258b Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:50:00 -0700
Subject: [PATCH 006/896] [SPARK-10279] [MLLIB] [PYSPARK] [DOCS] Add @since
 annotation to pyspark.mllib.util

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8689 from yu-iskw/SPARK-10279.
---
 python/pyspark/mllib/util.py | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/mllib/util.py b/python/pyspark/mllib/util.py
index 10a1e4b3eb0f..39bc6586dd58 100644
--- a/python/pyspark/mllib/util.py
+++ b/python/pyspark/mllib/util.py
@@ -23,7 +23,7 @@
     xrange = range
     basestring = str
 
-from pyspark import SparkContext
+from pyspark import SparkContext, since
 from pyspark.mllib.common import callMLlibFunc, inherit_doc
 from pyspark.mllib.linalg import Vectors, SparseVector, _convert_to_vector
 
@@ -32,6 +32,8 @@ class MLUtils(object):
 
     """
     Helper methods to load, save and pre-process data used in MLlib.
+
+    .. versionadded:: 1.0.0
     """
 
     @staticmethod
@@ -69,6 +71,7 @@ def _convert_labeled_point_to_libsvm(p):
         return " ".join(items)
 
     @staticmethod
+    @since("1.0.0")
     def loadLibSVMFile(sc, path, numFeatures=-1, minPartitions=None, multiclass=None):
         """
         Loads labeled data in the LIBSVM format into an RDD of
@@ -123,6 +126,7 @@ def loadLibSVMFile(sc, path, numFeatures=-1, minPartitions=None, multiclass=None
         return parsed.map(lambda x: LabeledPoint(x[0], Vectors.sparse(numFeatures, x[1], x[2])))
 
     @staticmethod
+    @since("1.0.0")
     def saveAsLibSVMFile(data, dir):
         """
         Save labeled data in LIBSVM format.
@@ -147,6 +151,7 @@ def saveAsLibSVMFile(data, dir):
         lines.saveAsTextFile(dir)
 
     @staticmethod
+    @since("1.1.0")
     def loadLabeledPoints(sc, path, minPartitions=None):
         """
         Load labeled points saved using RDD.saveAsTextFile.
@@ -172,6 +177,7 @@ def loadLabeledPoints(sc, path, minPartitions=None):
         return callMLlibFunc("loadLabeledPoints", sc, path, minPartitions)
 
     @staticmethod
+    @since("1.5.0")
     def appendBias(data):
         """
         Returns a new vector with `1.0` (bias) appended to
@@ -186,6 +192,7 @@ def appendBias(data):
             return _convert_to_vector(np.append(vec.toArray(), 1.0))
 
     @staticmethod
+    @since("1.5.0")
     def loadVectors(sc, path):
         """
         Loads vectors saved using `RDD[Vector].saveAsTextFile`
@@ -197,6 +204,8 @@ def loadVectors(sc, path):
 class Saveable(object):
     """
     Mixin for models and transformers which may be saved as files.
+
+    .. versionadded:: 1.3.0
     """
 
     def save(self, sc, path):
@@ -222,9 +231,13 @@ class JavaSaveable(Saveable):
     """
     Mixin for models that provide save() through their Scala
     implementation.
+
+    .. versionadded:: 1.3.0
     """
 
+    @since("1.3.0")
     def save(self, sc, path):
+        """Save this model to the given path."""
         if not isinstance(sc, SparkContext):
             raise TypeError("sc should be a SparkContext, got type %s" % type(sc))
         if not isinstance(path, basestring):
@@ -235,6 +248,8 @@ def save(self, sc, path):
 class Loader(object):
     """
     Mixin for classes which can load saved models from files.
+
+    .. versionadded:: 1.3.0
     """
 
     @classmethod
@@ -256,6 +271,8 @@ class JavaLoader(Loader):
     """
     Mixin for classes which can load saved models using its Scala
     implementation.
+
+    .. versionadded:: 1.3.0
     """
 
     @classmethod
@@ -280,15 +297,21 @@ def _load_java(cls, sc, path):
         return java_obj.load(sc._jsc.sc(), path)
 
     @classmethod
+    @since("1.3.0")
     def load(cls, sc, path):
+        """Load a model from the given path."""
         java_model = cls._load_java(sc, path)
         return cls(java_model)
 
 
 class LinearDataGenerator(object):
-    """Utils for generating linear data"""
+    """Utils for generating linear data.
+
+    .. versionadded:: 1.5.0
+    """
 
     @staticmethod
+    @since("1.5.0")
     def generateLinearInput(intercept, weights, xMean, xVariance,
                             nPoints, seed, eps):
         """
@@ -311,6 +334,7 @@ def generateLinearInput(intercept, weights, xMean, xVariance,
             xVariance, int(nPoints), int(seed), float(eps)))
 
     @staticmethod
+    @since("1.5.0")
     def generateLinearRDD(sc, nexamples, nfeatures, eps,
                           nParts=2, intercept=0.0):
         """

From c74d38fd8faf8cba981cf934341d24b9a3167025 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:50:46 -0700
Subject: [PATCH 007/896] [SPARK-10274] [MLLIB] Add @since annotation to
 pyspark.mllib.fpm

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8665 from yu-iskw/SPARK-10274.
---
 python/pyspark/mllib/fpm.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/mllib/fpm.py b/python/pyspark/mllib/fpm.py
index bdc4a132b1b1..bdabba9602a8 100644
--- a/python/pyspark/mllib/fpm.py
+++ b/python/pyspark/mllib/fpm.py
@@ -19,7 +19,7 @@
 from numpy import array
 from collections import namedtuple
 
-from pyspark import SparkContext
+from pyspark import SparkContext, since
 from pyspark.rdd import ignore_unicode_prefix
 from pyspark.mllib.common import JavaModelWrapper, callMLlibFunc, inherit_doc
 
@@ -41,8 +41,11 @@ class FPGrowthModel(JavaModelWrapper):
     >>> model = FPGrowth.train(rdd, 0.6, 2)
     >>> sorted(model.freqItemsets().collect())
     [FreqItemset(items=[u'a'], freq=4), FreqItemset(items=[u'c'], freq=3), ...
+
+    .. versionadded:: 1.4.0
     """
 
+    @since("1.4.0")
     def freqItemsets(self):
         """
         Returns the frequent itemsets of this model.
@@ -55,9 +58,12 @@ class FPGrowth(object):
     .. note:: Experimental
 
     A Parallel FP-growth algorithm to mine frequent itemsets.
+
+    .. versionadded:: 1.4.0
     """
 
     @classmethod
+    @since("1.4.0")
     def train(cls, data, minSupport=0.3, numPartitions=-1):
         """
         Computes an FP-Growth model that contains frequent itemsets.
@@ -74,6 +80,8 @@ def train(cls, data, minSupport=0.3, numPartitions=-1):
     class FreqItemset(namedtuple("FreqItemset", ["items", "freq"])):
         """
         Represents an (items, freq) tuple.
+
+        .. versionadded:: 1.4.0
         """
 
 

From 268088b899e6e165e746aed87840d47bfaf50c43 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 17 Sep 2015 08:51:19 -0700
Subject: [PATCH 008/896] [SPARK-10282] [ML] [PYSPARK] [DOCS] Add @since
 annotation to pyspark.ml.recommendation

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8692 from yu-iskw/SPARK-10282.
---
 python/pyspark/ml/recommendation.py | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/python/pyspark/ml/recommendation.py b/python/pyspark/ml/recommendation.py
index b06099ac0aee..ec5748a1cfe9 100644
--- a/python/pyspark/ml/recommendation.py
+++ b/python/pyspark/ml/recommendation.py
@@ -15,6 +15,7 @@
 # limitations under the License.
 #
 
+from pyspark import since
 from pyspark.ml.util import keyword_only
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
 from pyspark.ml.param.shared import *
@@ -80,6 +81,8 @@ class ALS(JavaEstimator, HasCheckpointInterval, HasMaxIter, HasPredictionCol, Ha
     Row(user=1, item=0, prediction=3.19...)
     >>> predictions[2]
     Row(user=2, item=0, prediction=-1.15...)
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -122,6 +125,7 @@ def __init__(self, rank=10, maxIter=10, regParam=0.1, numUserBlocks=10, numItemB
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, rank=10, maxIter=10, regParam=0.1, numUserBlocks=10, numItemBlocks=10,
                   implicitPrefs=False, alpha=1.0, userCol="user", itemCol="item", seed=None,
                   ratingCol="rating", nonnegative=False, checkpointInterval=10):
@@ -137,6 +141,7 @@ def setParams(self, rank=10, maxIter=10, regParam=0.1, numUserBlocks=10, numItem
     def _create_model(self, java_model):
         return ALSModel(java_model)
 
+    @since("1.4.0")
     def setRank(self, value):
         """
         Sets the value of :py:attr:`rank`.
@@ -144,12 +149,14 @@ def setRank(self, value):
         self._paramMap[self.rank] = value
         return self
 
+    @since("1.4.0")
     def getRank(self):
         """
         Gets the value of rank or its default value.
         """
         return self.getOrDefault(self.rank)
 
+    @since("1.4.0")
     def setNumUserBlocks(self, value):
         """
         Sets the value of :py:attr:`numUserBlocks`.
@@ -157,12 +164,14 @@ def setNumUserBlocks(self, value):
         self._paramMap[self.numUserBlocks] = value
         return self
 
+    @since("1.4.0")
     def getNumUserBlocks(self):
         """
         Gets the value of numUserBlocks or its default value.
         """
         return self.getOrDefault(self.numUserBlocks)
 
+    @since("1.4.0")
     def setNumItemBlocks(self, value):
         """
         Sets the value of :py:attr:`numItemBlocks`.
@@ -170,12 +179,14 @@ def setNumItemBlocks(self, value):
         self._paramMap[self.numItemBlocks] = value
         return self
 
+    @since("1.4.0")
     def getNumItemBlocks(self):
         """
         Gets the value of numItemBlocks or its default value.
         """
         return self.getOrDefault(self.numItemBlocks)
 
+    @since("1.4.0")
     def setNumBlocks(self, value):
         """
         Sets both :py:attr:`numUserBlocks` and :py:attr:`numItemBlocks` to the specific value.
@@ -183,6 +194,7 @@ def setNumBlocks(self, value):
         self._paramMap[self.numUserBlocks] = value
         self._paramMap[self.numItemBlocks] = value
 
+    @since("1.4.0")
     def setImplicitPrefs(self, value):
         """
         Sets the value of :py:attr:`implicitPrefs`.
@@ -190,12 +202,14 @@ def setImplicitPrefs(self, value):
         self._paramMap[self.implicitPrefs] = value
         return self
 
+    @since("1.4.0")
     def getImplicitPrefs(self):
         """
         Gets the value of implicitPrefs or its default value.
         """
         return self.getOrDefault(self.implicitPrefs)
 
+    @since("1.4.0")
     def setAlpha(self, value):
         """
         Sets the value of :py:attr:`alpha`.
@@ -203,12 +217,14 @@ def setAlpha(self, value):
         self._paramMap[self.alpha] = value
         return self
 
+    @since("1.4.0")
     def getAlpha(self):
         """
         Gets the value of alpha or its default value.
         """
         return self.getOrDefault(self.alpha)
 
+    @since("1.4.0")
     def setUserCol(self, value):
         """
         Sets the value of :py:attr:`userCol`.
@@ -216,12 +232,14 @@ def setUserCol(self, value):
         self._paramMap[self.userCol] = value
         return self
 
+    @since("1.4.0")
     def getUserCol(self):
         """
         Gets the value of userCol or its default value.
         """
         return self.getOrDefault(self.userCol)
 
+    @since("1.4.0")
     def setItemCol(self, value):
         """
         Sets the value of :py:attr:`itemCol`.
@@ -229,12 +247,14 @@ def setItemCol(self, value):
         self._paramMap[self.itemCol] = value
         return self
 
+    @since("1.4.0")
     def getItemCol(self):
         """
         Gets the value of itemCol or its default value.
         """
         return self.getOrDefault(self.itemCol)
 
+    @since("1.4.0")
     def setRatingCol(self, value):
         """
         Sets the value of :py:attr:`ratingCol`.
@@ -242,12 +262,14 @@ def setRatingCol(self, value):
         self._paramMap[self.ratingCol] = value
         return self
 
+    @since("1.4.0")
     def getRatingCol(self):
         """
         Gets the value of ratingCol or its default value.
         """
         return self.getOrDefault(self.ratingCol)
 
+    @since("1.4.0")
     def setNonnegative(self, value):
         """
         Sets the value of :py:attr:`nonnegative`.
@@ -255,6 +277,7 @@ def setNonnegative(self, value):
         self._paramMap[self.nonnegative] = value
         return self
 
+    @since("1.4.0")
     def getNonnegative(self):
         """
         Gets the value of nonnegative or its default value.
@@ -265,14 +288,18 @@ def getNonnegative(self):
 class ALSModel(JavaModel):
     """
     Model fitted by ALS.
+
+    .. versionadded:: 1.4.0
     """
 
     @property
+    @since("1.4.0")
     def rank(self):
         """rank of the matrix factorization model"""
         return self._call_java("rank")
 
     @property
+    @since("1.4.0")
     def userFactors(self):
         """
         a DataFrame that stores user factors in two columns: `id` and
@@ -281,6 +308,7 @@ def userFactors(self):
         return self._call_java("userFactors")
 
     @property
+    @since("1.4.0")
     def itemFactors(self):
         """
         a DataFrame that stores item factors in two columns: `id` and

From e51345e1e04e439827a07c95887d14ba38333057 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Thu, 17 Sep 2015 09:17:43 -0700
Subject: [PATCH 009/896] [SPARK-10077] [DOCS] [ML] Add package info for java
 of ml/feature

Should be the same as SPARK-7808 but use Java for the code example.
It would be great to add package doc for `spark.ml.feature`.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8740 from holdenk/SPARK-10077-JAVA-PACKAGE-DOC-FOR-SPARK.ML.FEATURE.
---
 .../apache/spark/ml/feature/package-info.java | 108 ++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/feature/package-info.java

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/package-info.java b/mllib/src/main/scala/org/apache/spark/ml/feature/package-info.java
new file mode 100644
index 000000000000..c22d2e0cd2d9
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/package-info.java
@@ -0,0 +1,108 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/**
+ * Feature transformers
+ *
+ * The `ml.feature` package provides common feature transformers that help convert raw data or
+ * features into more suitable forms for model fitting.
+ * Most feature transformers are implemented as {@link org.apache.spark.ml.Transformer}s, which
+ * transforms one {@link org.apache.spark.sql.DataFrame} into another, e.g.,
+ * {@link org.apache.spark.feature.HashingTF}.
+ * Some feature transformers are implemented as {@link org.apache.spark.ml.Estimator}}s, because the
+ * transformation requires some aggregated information of the dataset, e.g., document
+ * frequencies in {@link org.apache.spark.ml.feature.IDF}.
+ * For those feature transformers, calling {@link org.apache.spark.ml.Estimator#fit} is required to
+ * obtain the model first, e.g., {@link org.apache.spark.ml.feature.IDFModel}, in order to apply
+ * transformation.
+ * The transformation is usually done by appending new columns to the input
+ * {@link org.apache.spark.sql.DataFrame}, so all input columns are carried over.
+ *
+ * We try to make each transformer minimal, so it becomes flexible to assemble feature
+ * transformation pipelines.
+ * {@link org.apache.spark.ml.Pipeline} can be used to chain feature transformers, and
+ * {@link org.apache.spark.ml.feature.VectorAssembler} can be used to combine multiple feature
+ * transformations, for example:
+ *
+ * <pre>
+ * <code>
+ *   import java.util.Arrays;
+ *
+ *   import org.apache.spark.api.java.JavaRDD;
+ *   import static org.apache.spark.sql.types.DataTypes.*;
+ *   import org.apache.spark.sql.types.StructType;
+ *   import org.apache.spark.sql.DataFrame;
+ *   import org.apache.spark.sql.RowFactory;
+ *   import org.apache.spark.sql.Row;
+ *
+ *   import org.apache.spark.ml.feature.*;
+ *   import org.apache.spark.ml.Pipeline;
+ *   import org.apache.spark.ml.PipelineStage;
+ *   import org.apache.spark.ml.PipelineModel;
+ *
+ *  // a DataFrame with three columns: id (integer), text (string), and rating (double).
+ *  StructType schema = createStructType(
+ *    Arrays.asList(
+ *      createStructField("id", IntegerType, false),
+ *      createStructField("text", StringType, false),
+ *      createStructField("rating", DoubleType, false)));
+ *  JavaRDD<Row> rowRDD = jsc.parallelize(
+ *    Arrays.asList(
+ *      RowFactory.create(0, "Hi I heard about Spark", 3.0),
+ *      RowFactory.create(1, "I wish Java could use case classes", 4.0),
+ *      RowFactory.create(2, "Logistic regression models are neat", 4.0)));
+ *  DataFrame df = jsql.createDataFrame(rowRDD, schema);
+ *  // define feature transformers
+ *  RegexTokenizer tok = new RegexTokenizer()
+ *    .setInputCol("text")
+ *    .setOutputCol("words");
+ *  StopWordsRemover sw = new StopWordsRemover()
+ *    .setInputCol("words")
+ *    .setOutputCol("filtered_words");
+ *  HashingTF tf = new HashingTF()
+ *    .setInputCol("filtered_words")
+ *    .setOutputCol("tf")
+ *    .setNumFeatures(10000);
+ *  IDF idf = new IDF()
+ *    .setInputCol("tf")
+ *    .setOutputCol("tf_idf");
+ *  VectorAssembler assembler = new VectorAssembler()
+ *    .setInputCols(new String[] {"tf_idf", "rating"})
+ *    .setOutputCol("features");
+ *
+ *  // assemble and fit the feature transformation pipeline
+ *  Pipeline pipeline = new Pipeline()
+ *    .setStages(new PipelineStage[] {tok, sw, tf, idf, assembler});
+ *  PipelineModel model = pipeline.fit(df);
+ *
+ *  // save transformed features with raw data
+ *  model.transform(df)
+ *    .select("id", "text", "rating", "features")
+ *    .write().format("parquet").save("/output/path");
+ * </code>
+ * </pre>
+ *
+ * Some feature transformers implemented in MLlib are inspired by those implemented in scikit-learn.
+ * The major difference is that most scikit-learn feature transformers operate eagerly on the entire
+ * input dataset, while MLlib's feature transformers operate lazily on individual columns,
+ * which is more efficient and flexible to handle large and complex datasets.
+ *
+ * @see <a href="http://scikit-learn.org/stable/modules/preprocessing.html" target="_blank">
+ * scikit-learn.preprocessing</a>
+ */
+package org.apache.spark.ml.feature;

From 2a508df20d03b3d4a3c05b65fb02d849bc080ef9 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Thu, 17 Sep 2015 09:21:21 -0700
Subject: [PATCH 010/896] [SPARK-10459] [SQL] Do not need to have ConvertToSafe
 for PythonUDF

JIRA: https://issues.apache.org/jira/browse/SPARK-10459

As mentioned in the JIRA, `PythonUDF` actually could process `UnsafeRow`.

Specially, the rows in `childResults` in `BatchPythonEvaluation` will be projected to a `MutableRow`. So I think we can enable `canProcessUnsafeRows` for `BatchPythonEvaluation` and get rid of redundant `ConvertToSafe`.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8616 from viirya/pyudf-unsafe.
---
 .../scala/org/apache/spark/sql/execution/pythonUDFs.scala     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
index 5a58d846ad80..d0411da6fdf5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
@@ -337,6 +337,10 @@ case class BatchPythonEvaluation(udf: PythonUDF, output: Seq[Attribute], child:
 
   def children: Seq[SparkPlan] = child :: Nil
 
+  override def outputsUnsafeRows: Boolean = false
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = true
+
   protected override def doExecute(): RDD[InternalRow] = {
     val childResults = child.execute().map(_.copy())
 

From c88bb5df94f9696677c3a429472114bc66f32a52 Mon Sep 17 00:00:00 2001
From: "yangping.wu" <wyphao.2007@163.com>
Date: Thu, 17 Sep 2015 09:52:40 -0700
Subject: [PATCH 011/896] [SPARK-10660] Doc describe error in the "Running
 Spark on YARN" page
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In the Configuration section, the **spark.yarn.driver.memoryOverhead** and **spark.yarn.am.memoryOverhead**‘s default value should be "driverMemory * 0.10, with minimum of 384" and "AM memory * 0.10, with minimum of 384" respectively. Because from Spark 1.4.0, the **MEMORY_OVERHEAD_FACTOR** is set to 0.1.0, not 0.07.

Author: yangping.wu <wyphao.2007@163.com>

Closes #8797 from 397090770/SparkOnYarnDocError.
---
 docs/running-on-yarn.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index d1244323edff..3a961d245f3d 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -211,14 +211,14 @@ If you need a reference to the proper location to put log files in the YARN so t
 </tr>
 <tr>
   <td><code>spark.yarn.driver.memoryOverhead</code></td>
-  <td>driverMemory * 0.07, with minimum of 384 </td>
+  <td>driverMemory * 0.10, with minimum of 384 </td>
   <td>
     The amount of off heap memory (in megabytes) to be allocated per driver in cluster mode. This is memory that accounts for things like VM overheads, interned strings, other native overheads, etc. This tends to grow with the container size (typically 6-10%).
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.am.memoryOverhead</code></td>
-  <td>AM memory * 0.07, with minimum of 384 </td>
+  <td>AM memory * 0.10, with minimum of 384 </td>
   <td>
     Same as <code>spark.yarn.driver.memoryOverhead</code>, but for the Application Master in client mode.
   </td>

From 136c77d8bbf48f7c45dd7c3fbe261a0476f455fe Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Thu, 17 Sep 2015 10:02:15 -0700
Subject: [PATCH 012/896] [SPARK-10642] [PYSPARK] Fix crash when calling
 rdd.lookup() on tuple keys

JIRA: https://issues.apache.org/jira/browse/SPARK-10642

When calling `rdd.lookup()` on a RDD with tuple keys, `portable_hash` will return a long. That causes `DAGScheduler.submitJob` to throw `java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer`.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8796 from viirya/fix-pyrdd-lookup.
---
 python/pyspark/rdd.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index 9ef60a7e2c84..ab5aab1e115f 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -84,7 +84,7 @@ def portable_hash(x):
         h ^= len(x)
         if h == -1:
             h = -2
-        return h
+        return int(h)
     return hash(x)
 
 
@@ -2192,6 +2192,9 @@ def lookup(self, key):
         [42]
         >>> sorted.lookup(1024)
         []
+        >>> rdd2 = sc.parallelize([(('a', 'b'), 'c')]).groupByKey()
+        >>> list(rdd2.lookup(('a', 'b'))[0])
+        ['c']
         """
         values = self.filter(lambda kv: kv[0] == key).values()
 

From 81b4db374dd61b6f1c30511c70b6ab2a52c68faa Mon Sep 17 00:00:00 2001
From: Josiah Samuel <josiah_sams@in.ibm.com>
Date: Thu, 17 Sep 2015 10:18:21 -0700
Subject: [PATCH 013/896] [SPARK-10172] [CORE] disable sort in HistoryServer
 webUI

This pull request is to address the JIRA SPARK-10172 (History Server web UI gets messed up when sorting on any column).
The content of the table gets messed up due to the rowspan attribute of the table data(cell) during sorting.
The current table sort library used in SparkUI (sorttable.js) doesn't support/handle cells(td) with rowspans.
The fix will disable the table sort in the web UI, when there are jobs listed with multiple attempts.

Author: Josiah Samuel <josiah_sams@in.ibm.com>

Closes #8506 from josiahsams/SPARK-10172.
---
 .../scala/org/apache/spark/deploy/history/HistoryPage.scala  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala b/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
index 0830cc1ba124..b347cb3be69f 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
@@ -51,7 +51,10 @@ private[history] class HistoryPage(parent: HistoryServer) extends WebUIPage("")
     val hasMultipleAttempts = appsToShow.exists(_.attempts.size > 1)
     val appTable =
       if (hasMultipleAttempts) {
-        UIUtils.listingTable(appWithAttemptHeader, appWithAttemptRow, appsToShow)
+        // Sorting is disable here as table sort on rowspan has issues.
+        // ref. SPARK-10172
+        UIUtils.listingTable(appWithAttemptHeader, appWithAttemptRow,
+          appsToShow, sortable = false)
       } else {
         UIUtils.listingTable(appHeader, appRow, appsToShow)
       }

From 36d8b278d82e788bf583e8438fac524d0023311d Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Thu, 17 Sep 2015 10:25:18 -0700
Subject: [PATCH 014/896] [SPARK-10531] [CORE] AppId is set as AppName in
 status rest api

Verify it manually.

Author: Jeff Zhang <zjffdu@apache.org>

Closes #8688 from zjffdu/SPARK-10531.
---
 .../main/scala/org/apache/spark/SparkContext.scala    |  1 +
 .../spark/deploy/history/FsHistoryProvider.scala      |  9 ++++-----
 .../scala/org/apache/spark/deploy/master/Master.scala |  2 +-
 core/src/main/scala/org/apache/spark/ui/SparkUI.scala | 11 ++++++-----
 .../scala/org/apache/spark/ui/UISeleniumSuite.scala   |  2 +-
 5 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index a2f34eafa2c3..9c3218719f7f 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -521,6 +521,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     _applicationId = _taskScheduler.applicationId()
     _applicationAttemptId = taskScheduler.applicationAttemptId()
     _conf.set("spark.app.id", _applicationId)
+    _ui.foreach(_.setAppId(_applicationId))
     _env.blockManager.initialize(_applicationId)
 
     // The metrics system for Driver need to be set spark.app.id to app ID.
diff --git a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
index a5755eac3639..8eb2ba1e8683 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
@@ -146,16 +146,15 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
           val ui = {
             val conf = this.conf.clone()
             val appSecManager = new SecurityManager(conf)
-            SparkUI.createHistoryUI(conf, replayBus, appSecManager, appId,
+            SparkUI.createHistoryUI(conf, replayBus, appSecManager, appInfo.name,
               HistoryServer.getAttemptURI(appId, attempt.attemptId), attempt.startTime)
             // Do not call ui.bind() to avoid creating a new server for each application
           }
           val appListener = new ApplicationEventListener()
           replayBus.addListener(appListener)
-          val appInfo = replay(fs.getFileStatus(new Path(logDir, attempt.logPath)), replayBus)
-          appInfo.map { info =>
-            ui.setAppName(s"${info.name} ($appId)")
-
+          val appAttemptInfo = replay(fs.getFileStatus(new Path(logDir, attempt.logPath)),
+            replayBus)
+          appAttemptInfo.map { info =>
             val uiAclsEnabled = conf.getBoolean("spark.history.ui.acls.enable", false)
             ui.getSecurityManager.setAcls(uiAclsEnabled)
             // make sure to set admin acls before view acls so they are properly picked up
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
index 26904d39a9be..d518e92133aa 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
@@ -944,7 +944,7 @@ private[deploy] class Master(
       val logInput = EventLoggingListener.openEventLog(new Path(eventLogFile), fs)
       val replayBus = new ReplayListenerBus()
       val ui = SparkUI.createHistoryUI(new SparkConf, replayBus, new SecurityManager(conf),
-        appName + status, HistoryServer.UI_PATH_PREFIX + s"/${app.id}", app.startTime)
+        appName, HistoryServer.UI_PATH_PREFIX + s"/${app.id}", app.startTime)
       val maybeTruncated = eventLogFile.endsWith(EventLoggingListener.IN_PROGRESS)
       try {
         replayBus.replay(logInput, eventLogFile, maybeTruncated)
diff --git a/core/src/main/scala/org/apache/spark/ui/SparkUI.scala b/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
index d8b90568b7b9..99085ada9f0a 100644
--- a/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
+++ b/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
@@ -56,6 +56,8 @@ private[spark] class SparkUI private (
 
   val stagesTab = new StagesTab(this)
 
+  var appId: String = _
+
   /** Initialize all components of the server. */
   def initialize() {
     attachTab(new JobsTab(this))
@@ -75,9 +77,8 @@ private[spark] class SparkUI private (
 
   def getAppName: String = appName
 
-  /** Set the app name for this UI. */
-  def setAppName(name: String) {
-    appName = name
+  def setAppId(id: String): Unit = {
+    appId = id
   }
 
   /** Stop the server behind this web interface. Only valid after bind(). */
@@ -94,12 +95,12 @@ private[spark] class SparkUI private (
   private[spark] def appUIAddress = s"http://$appUIHostPort"
 
   def getSparkUI(appId: String): Option[SparkUI] = {
-    if (appId == appName) Some(this) else None
+    if (appId == this.appId) Some(this) else None
   }
 
   def getApplicationInfoList: Iterator[ApplicationInfo] = {
     Iterator(new ApplicationInfo(
-      id = appName,
+      id = appId,
       name = appName,
       attempts = Seq(new ApplicationAttemptInfo(
         attemptId = None,
diff --git a/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala b/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
index 22e30ecaf053..18eec7da9763 100644
--- a/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
@@ -658,6 +658,6 @@ class UISeleniumSuite extends SparkFunSuite with WebBrowser with Matchers with B
   }
 
   def apiUrl(ui: SparkUI, path: String): URL = {
-    new URL(ui.appUIAddress + "/api/v1/applications/test/" + path)
+    new URL(ui.appUIAddress + "/api/v1/applications/" + ui.sc.get.applicationId + "/" + path)
   }
 }

From e0dc2bc232206d2f4da4278502c1f88babc8b55a Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 17 Sep 2015 11:05:30 -0700
Subject: [PATCH 015/896] [SPARK-10650] Clean before building docs

The [published docs for 1.5.0](http://spark.apache.org/docs/1.5.0/api/java/org/apache/spark/streaming/) have a bunch of test classes in them.  The only way I can reproduce this is to `test:compile` before running `unidoc`.  To prevent this from happening again, I've added a clean before doc generation.

Author: Michael Armbrust <michael@databricks.com>

Closes #8787 from marmbrus/testsInDocs.
---
 docs/_plugins/copy_api_dirs.rb | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/docs/_plugins/copy_api_dirs.rb b/docs/_plugins/copy_api_dirs.rb
index 15ceda11a8a8..01718d98dffe 100644
--- a/docs/_plugins/copy_api_dirs.rb
+++ b/docs/_plugins/copy_api_dirs.rb
@@ -26,12 +26,15 @@
     curr_dir = pwd
     cd("..")
 
-    puts "Running 'build/sbt -Pkinesis-asl compile unidoc' from " + pwd + "; this may take a few minutes..."
-    puts `build/sbt -Pkinesis-asl compile unidoc`
+    puts "Running 'build/sbt -Pkinesis-asl clean compile unidoc' from " + pwd + "; this may take a few minutes..."
+    puts `build/sbt -Pkinesis-asl clean compile unidoc`
 
     puts "Moving back into docs dir."
     cd("docs")
 
+    puts "Removing old docs"
+    puts `rm -rf api`
+
     # Copy over the unified ScalaDoc for all projects to api/scala.
     # This directory will be copied over to _site when `jekyll` command is run.
     source = "../target/scala-2.10/unidoc"

From aad644fbe29151aec9004817d42e4928bdb326f3 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Thu, 17 Sep 2015 11:14:52 -0700
Subject: [PATCH 016/896] [SPARK-10639] [SQL] Need to convert UDAF's result
 from scala to sql type

https://issues.apache.org/jira/browse/SPARK-10639

Author: Yin Huai <yhuai@databricks.com>

Closes #8788 from yhuai/udafConversion.
---
 .../sql/catalyst/CatalystTypeConverters.scala |   7 +-
 .../spark/sql/RandomDataGenerator.scala       |  16 ++-
 .../spark/sql/execution/aggregate/udaf.scala  |  37 +++++-
 .../org/apache/spark/sql/QueryTest.scala      |  21 ++--
 .../spark/sql/UserDefinedTypeSuite.scala      |  11 ++
 .../execution/AggregationQuerySuite.scala     | 108 +++++++++++++++++-
 6 files changed, 188 insertions(+), 12 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
index 966623ed017b..f25591794abd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
@@ -138,8 +138,13 @@ object CatalystTypeConverters {
 
   private case class UDTConverter(
       udt: UserDefinedType[_]) extends CatalystTypeConverter[Any, Any, Any] {
+    // toCatalyst (it calls toCatalystImpl) will do null check.
     override def toCatalystImpl(scalaValue: Any): Any = udt.serialize(scalaValue)
-    override def toScala(catalystValue: Any): Any = udt.deserialize(catalystValue)
+
+    override def toScala(catalystValue: Any): Any = {
+      if (catalystValue == null) null else udt.deserialize(catalystValue)
+    }
+
     override def toScalaImpl(row: InternalRow, column: Int): Any =
       toScala(row.get(column, udt.sqlType))
   }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
index 4025cbcec101..e48395028e39 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
@@ -108,7 +108,21 @@ object RandomDataGenerator {
         arr
       })
       case BooleanType => Some(() => rand.nextBoolean())
-      case DateType => Some(() => new java.sql.Date(rand.nextInt()))
+      case DateType =>
+        val generator =
+          () => {
+            var milliseconds = rand.nextLong() % 253402329599999L
+            // -62135740800000L is the number of milliseconds before January 1, 1970, 00:00:00 GMT
+            // for "0001-01-01 00:00:00.000000". We need to find a
+            // number that is greater or equals to this number as a valid timestamp value.
+            while (milliseconds < -62135740800000L) {
+              // 253402329599999L is the the number of milliseconds since
+              // January 1, 1970, 00:00:00 GMT for "9999-12-31 23:59:59.999999".
+              milliseconds = rand.nextLong() % 253402329599999L
+            }
+            DateTimeUtils.toJavaDate((milliseconds / DateTimeUtils.MILLIS_PER_DAY).toInt)
+          }
+        Some(generator)
       case TimestampType =>
         val generator =
           () => {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
index d43d3dd9ffaa..1114fe6552bd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
@@ -40,6 +40,9 @@ sealed trait BufferSetterGetterUtils {
     var i = 0
     while (i < getters.length) {
       getters(i) = dataTypes(i) match {
+        case NullType =>
+          (row: InternalRow, ordinal: Int) => null
+
         case BooleanType =>
           (row: InternalRow, ordinal: Int) =>
             if (row.isNullAt(ordinal)) null else row.getBoolean(ordinal)
@@ -74,6 +77,14 @@ sealed trait BufferSetterGetterUtils {
           (row: InternalRow, ordinal: Int) =>
             if (row.isNullAt(ordinal)) null else row.getDecimal(ordinal, precision, scale)
 
+        case DateType =>
+          (row: InternalRow, ordinal: Int) =>
+            if (row.isNullAt(ordinal)) null else row.getInt(ordinal)
+
+        case TimestampType =>
+          (row: InternalRow, ordinal: Int) =>
+            if (row.isNullAt(ordinal)) null else row.getLong(ordinal)
+
         case other =>
           (row: InternalRow, ordinal: Int) =>
             if (row.isNullAt(ordinal)) null else row.get(ordinal, other)
@@ -92,6 +103,9 @@ sealed trait BufferSetterGetterUtils {
     var i = 0
     while (i < setters.length) {
       setters(i) = dataTypes(i) match {
+        case NullType =>
+          (row: MutableRow, ordinal: Int, value: Any) => row.setNullAt(ordinal)
+
         case b: BooleanType =>
           (row: MutableRow, ordinal: Int, value: Any) =>
             if (value != null) {
@@ -150,9 +164,23 @@ sealed trait BufferSetterGetterUtils {
 
         case dt: DecimalType =>
           val precision = dt.precision
+          (row: MutableRow, ordinal: Int, value: Any) =>
+            // To make it work with UnsafeRow, we cannot use setNullAt.
+            // Please see the comment of UnsafeRow's setDecimal.
+            row.setDecimal(ordinal, value.asInstanceOf[Decimal], precision)
+
+        case DateType =>
           (row: MutableRow, ordinal: Int, value: Any) =>
             if (value != null) {
-              row.setDecimal(ordinal, value.asInstanceOf[Decimal], precision)
+              row.setInt(ordinal, value.asInstanceOf[Int])
+            } else {
+              row.setNullAt(ordinal)
+            }
+
+        case TimestampType =>
+          (row: MutableRow, ordinal: Int, value: Any) =>
+            if (value != null) {
+              row.setLong(ordinal, value.asInstanceOf[Long])
             } else {
               row.setNullAt(ordinal)
             }
@@ -205,6 +233,7 @@ private[sql] class MutableAggregationBufferImpl (
       throw new IllegalArgumentException(
         s"Could not access ${i}th value in this buffer because it only has $length values.")
     }
+
     toScalaConverters(i)(bufferValueGetters(i)(underlyingBuffer, offsets(i)))
   }
 
@@ -352,6 +381,10 @@ private[sql] case class ScalaUDAF(
     }
   }
 
+  private[this] lazy val outputToCatalystConverter: Any => Any = {
+    CatalystTypeConverters.createToCatalystConverter(dataType)
+  }
+
   // This buffer is only used at executor side.
   private[this] var inputAggregateBuffer: InputAggregationBuffer = null
 
@@ -424,7 +457,7 @@ private[sql] case class ScalaUDAF(
   override def eval(buffer: InternalRow): Any = {
     evalAggregateBuffer.underlyingInputBuffer = buffer
 
-    udaf.evaluate(evalAggregateBuffer)
+    outputToCatalystConverter(udaf.evaluate(evalAggregateBuffer))
   }
 
   override def toString: String = {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index cada03e9ac6b..e3c5a426671d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -115,19 +115,26 @@ object QueryTest {
    */
   def checkAnswer(df: DataFrame, expectedAnswer: Seq[Row]): Option[String] = {
     val isSorted = df.logicalPlan.collect { case s: logical.Sort => s }.nonEmpty
+
+    // We need to call prepareRow recursively to handle schemas with struct types.
+    def prepareRow(row: Row): Row = {
+      Row.fromSeq(row.toSeq.map {
+        case null => null
+        case d: java.math.BigDecimal => BigDecimal(d)
+        // Convert array to Seq for easy equality check.
+        case b: Array[_] => b.toSeq
+        case r: Row => prepareRow(r)
+        case o => o
+      })
+    }
+
     def prepareAnswer(answer: Seq[Row]): Seq[Row] = {
       // Converts data to types that we can do equality comparison using Scala collections.
       // For BigDecimal type, the Scala type has a better definition of equality test (similar to
       // Java's java.math.BigDecimal.compareTo).
       // For binary arrays, we convert it to Seq to avoid of calling java.util.Arrays.equals for
       // equality test.
-      val converted: Seq[Row] = answer.map { s =>
-        Row.fromSeq(s.toSeq.map {
-          case d: java.math.BigDecimal => BigDecimal(d)
-          case b: Array[Byte] => b.toSeq
-          case o => o
-        })
-      }
+      val converted: Seq[Row] = answer.map(prepareRow)
       if (!isSorted) converted.sortBy(_.toString()) else converted
     }
     val sparkAnswer = try df.collect().toSeq catch {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
index 46d87843dfa4..7992fd59ff4b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
@@ -22,6 +22,7 @@ import scala.beans.{BeanInfo, BeanProperty}
 import com.clearspring.analytics.stream.cardinality.HyperLogLog
 
 import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions.{OpenHashSetUDT, HyperLogLogUDT}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
@@ -163,4 +164,14 @@ class UserDefinedTypeSuite extends QueryTest with SharedSQLContext {
     assert(new MyDenseVectorUDT().typeName === "mydensevector")
     assert(new OpenHashSetUDT(IntegerType).typeName === "openhashset")
   }
+
+  test("Catalyst type converter null handling for UDTs") {
+    val udt = new MyDenseVectorUDT()
+    val toScalaConverter = CatalystTypeConverters.createToScalaConverter(udt)
+    assert(toScalaConverter(null) === null)
+
+    val toCatalystConverter = CatalystTypeConverters.createToCatalystConverter(udt)
+    assert(toCatalystConverter(null) === null)
+
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index a73b1bd52c09..24b1846923c7 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -17,13 +17,55 @@
 
 package org.apache.spark.sql.hive.execution
 
+import scala.collection.JavaConverters._
+
 import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.expressions.UnsafeRow
 import org.apache.spark.sql.execution.aggregate
+import org.apache.spark.sql.expressions.{MutableAggregationBuffer, UserDefinedAggregateFunction}
+import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SQLTestUtils
-import org.apache.spark.sql.types.{IntegerType, StringType, StructField, StructType}
+import org.apache.spark.sql.types._
 import org.apache.spark.sql.hive.aggregate.{MyDoubleAvg, MyDoubleSum}
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 
+class ScalaAggregateFunction(schema: StructType) extends UserDefinedAggregateFunction {
+
+  def inputSchema: StructType = schema
+
+  def bufferSchema: StructType = schema
+
+  def dataType: DataType = schema
+
+  def deterministic: Boolean = true
+
+  def initialize(buffer: MutableAggregationBuffer): Unit = {
+    (0 until schema.length).foreach { i =>
+      buffer.update(i, null)
+    }
+  }
+
+  def update(buffer: MutableAggregationBuffer, input: Row): Unit = {
+    if (!input.isNullAt(0) && input.getInt(0) == 50) {
+      (0 until schema.length).foreach { i =>
+        buffer.update(i, input.get(i))
+      }
+    }
+  }
+
+  def merge(buffer1: MutableAggregationBuffer, buffer2: Row): Unit = {
+    if (!buffer2.isNullAt(0) && buffer2.getInt(0) == 50) {
+      (0 until schema.length).foreach { i =>
+        buffer1.update(i, buffer2.get(i))
+      }
+    }
+  }
+
+  def evaluate(buffer: Row): Any = {
+    Row.fromSeq(buffer.toSeq)
+  }
+}
+
 abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   import testImplicits._
 
@@ -508,6 +550,70 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
       assert(errorMessage.contains("implemented based on the new Aggregate Function interface"))
     }
   }
+
+  test("udaf with all data types") {
+    val struct =
+      StructType(
+        StructField("f1", FloatType, true) ::
+          StructField("f2", ArrayType(BooleanType), true) :: Nil)
+    val dataTypes = Seq(StringType, BinaryType, NullType, BooleanType,
+      ByteType, ShortType, IntegerType, LongType,
+      FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
+      DateType, TimestampType,
+      ArrayType(IntegerType), MapType(StringType, LongType), struct,
+      new MyDenseVectorUDT())
+    // Right now, we will use SortBasedAggregate to handle UDAFs.
+    // UnsafeRow.mutableFieldTypes.asScala.toSeq will trigger SortBasedAggregate to use
+    // UnsafeRow as the aggregation buffer. While, dataTypes will trigger
+    // SortBasedAggregate to use a safe row as the aggregation buffer.
+    Seq(dataTypes, UnsafeRow.mutableFieldTypes.asScala.toSeq).foreach { dataTypes =>
+      val fields = dataTypes.zipWithIndex.map { case (dataType, index) =>
+        StructField(s"col$index", dataType, nullable = true)
+      }
+      // The schema used for data generator.
+      val schemaForGenerator = StructType(fields)
+      // The schema used for the DataFrame df.
+      val schema = StructType(StructField("id", IntegerType) +: fields)
+
+      logInfo(s"Testing schema: ${schema.treeString}")
+
+      val udaf = new ScalaAggregateFunction(schema)
+      // Generate data at the driver side. We need to materialize the data first and then
+      // create RDD.
+      val maybeDataGenerator =
+        RandomDataGenerator.forType(
+          dataType = schemaForGenerator,
+          nullable = true,
+          seed = Some(System.nanoTime()))
+      val dataGenerator =
+        maybeDataGenerator
+          .getOrElse(fail(s"Failed to create data generator for schema $schemaForGenerator"))
+      val data = (1 to 50).map { i =>
+        dataGenerator.apply() match {
+          case row: Row => Row.fromSeq(i +: row.toSeq)
+          case null => Row.fromSeq(i +: Seq.fill(schemaForGenerator.length)(null))
+          case other =>
+            fail(s"Row or null is expected to be generated, " +
+              s"but a ${other.getClass.getCanonicalName} is generated.")
+        }
+      }
+
+      // Create a DF for the schema with random data.
+      val rdd = sqlContext.sparkContext.parallelize(data, 1)
+      val df = sqlContext.createDataFrame(rdd, schema)
+
+      val allColumns = df.schema.fields.map(f => col(f.name))
+      val expectedAnaswer =
+        data
+          .find(r => r.getInt(0) == 50)
+          .getOrElse(fail("A row with id 50 should be the expected answer."))
+      checkAnswer(
+        df.groupBy().agg(udaf(allColumns: _*)),
+        // udaf returns a Row as the output value.
+        Row(expectedAnaswer)
+      )
+    }
+  }
 }
 
 class SortBasedAggregationQuerySuite extends AggregationQuerySuite {

From 64743870f23bffb8d96dcc8a0181c1452782a151 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 17 Sep 2015 11:24:38 -0700
Subject: [PATCH 017/896] [SPARK-10394] [ML] Make GBTParams use shared stepSize

```GBTParams``` has ```stepSize``` as learning rate currently.
ML has shared param class ```HasStepSize```, ```GBTParams``` can extend from it rather than duplicated implementation.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8552 from yanboliang/spark-10394.
---
 .../org/apache/spark/ml/tree/treeParams.scala | 28 +++++++++----------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
index d29f5253c9c3..42e74ce6d2c6 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.tree
 import org.apache.spark.ml.classification.ClassifierParams
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param._
-import org.apache.spark.ml.param.shared.{HasCheckpointInterval, HasMaxIter, HasSeed, HasThresholds}
+import org.apache.spark.ml.param.shared._
 import org.apache.spark.mllib.tree.configuration.{Algo => OldAlgo, BoostingStrategy => OldBoostingStrategy, Strategy => OldStrategy}
 import org.apache.spark.mllib.tree.impurity.{Entropy => OldEntropy, Gini => OldGini, Impurity => OldImpurity, Variance => OldVariance}
 import org.apache.spark.mllib.tree.loss.{Loss => OldLoss}
@@ -365,17 +365,7 @@ private[ml] object RandomForestParams {
  *
  * Note: Marked as private and DeveloperApi since this may be made public in the future.
  */
-private[ml] trait GBTParams extends TreeEnsembleParams with HasMaxIter {
-
-  /**
-   * Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the contribution of each
-   * estimator.
-   * (default = 0.1)
-   * @group param
-   */
-  final val stepSize: DoubleParam = new DoubleParam(this, "stepSize", "Step size (a.k.a." +
-    " learning rate) in interval (0, 1] for shrinking the contribution of each estimator",
-    ParamValidators.inRange(0, 1, lowerInclusive = false, upperInclusive = true))
+private[ml] trait GBTParams extends TreeEnsembleParams with HasMaxIter with HasStepSize {
 
   /* TODO: Add this doc when we add this param.  SPARK-7132
    * Threshold for stopping early when runWithValidation is used.
@@ -393,11 +383,19 @@ private[ml] trait GBTParams extends TreeEnsembleParams with HasMaxIter {
   /** @group setParam */
   def setMaxIter(value: Int): this.type = set(maxIter, value)
 
-  /** @group setParam */
+  /**
+   * Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the contribution of each
+   * estimator.
+   * (default = 0.1)
+   * @group setParam
+   */
   def setStepSize(value: Double): this.type = set(stepSize, value)
 
-  /** @group getParam */
-  final def getStepSize: Double = $(stepSize)
+  override def validateParams(): Unit = {
+    require(ParamValidators.inRange(0, 1, lowerInclusive = false, upperInclusive = true)(
+      getStepSize), "GBT parameter stepSize should be in interval (0, 1], " +
+      s"but it given invalid value $getStepSize.")
+  }
 
   /** (private[ml]) Create a BoostingStrategy instance to use with the old API. */
   private[ml] def getOldBoostingStrategy(

From f1c911552cf5d0d60831c79c1881016293aec66c Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Thu, 17 Sep 2015 11:40:24 -0700
Subject: [PATCH 018/896] [SPARK-10657] Remove SCP-based Jenkins log archiving

As of https://issues.apache.org/jira/browse/SPARK-7561, we no longer need to use our custom SCP-based mechanism for archiving Jenkins logs on the master machine; this has been superseded by the use of a Jenkins plugin which archives the logs and provides public links to view them.

Per shaneknapp, we should remove this log syncing mechanism if it is no longer necessary; removing the need to SCP from the Jenkins workers to the masters is a desired step as part of some larger Jenkins infra refactoring.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8793 from JoshRosen/remove-jenkins-ssh-to-master.
---
 dev/run-tests-jenkins | 35 -----------------------------------
 1 file changed, 35 deletions(-)

diff --git a/dev/run-tests-jenkins b/dev/run-tests-jenkins
index 3be78575e70f..d3b05fa6df0c 100755
--- a/dev/run-tests-jenkins
+++ b/dev/run-tests-jenkins
@@ -116,39 +116,6 @@ function post_message () {
   fi
 }
 
-function send_archived_logs () {
-  echo "Archiving unit tests logs..."
-
-  local log_files=$(
-    find .\
-      -name "unit-tests.log" -o\
-      -path "./sql/hive/target/HiveCompatibilitySuite.failed" -o\
-      -path "./sql/hive/target/HiveCompatibilitySuite.hiveFailed" -o\
-      -path "./sql/hive/target/HiveCompatibilitySuite.wrong"
-  )
-
-  if [ -z "$log_files" ]; then
-    echo "> No log files found." >&2
-  else
-    local log_archive="unit-tests-logs.tar.gz"
-    echo "$log_files" | xargs tar czf ${log_archive}
-
-    local jenkins_build_dir=${JENKINS_HOME}/jobs/${JOB_NAME}/builds/${BUILD_NUMBER}
-    local scp_output=$(scp ${log_archive} amp-jenkins-master:${jenkins_build_dir}/${log_archive})
-    local scp_status="$?"
-
-    if [ "$scp_status" -ne 0 ]; then
-      echo "Failed to send archived unit tests logs to Jenkins master." >&2
-      echo "> scp_status: ${scp_status}" >&2
-      echo "> scp_output: ${scp_output}" >&2
-    else
-      echo "> Send successful."
-    fi
-
-    rm -f ${log_archive}
-  fi
-}
-
 # post start message
 {
   start_message="\
@@ -244,8 +211,6 @@ done
 
     test_result_note=" * This patch **fails $failing_test**."
   fi
-
-  send_archived_logs
 }
 
 # post end message

From 4fbf3328692e876f39ea78494510f9d9c5a53f15 Mon Sep 17 00:00:00 2001
From: Eric Liang <ekl@databricks.com>
Date: Thu, 17 Sep 2015 14:09:06 -0700
Subject: [PATCH 019/896] [SPARK-9698] [ML] Add RInteraction transformer for
 supporting R-style feature interactions

This is a pre-req for supporting the ":" operator in the RFormula feature transformer.

Design doc from umbrella task: https://docs.google.com/document/d/10NZNSEurN2EdWM31uFYsgayIPfCFHiuIu3pCWrUmP_c/edit

mengxr

Author: Eric Liang <ekl@databricks.com>

Closes #7987 from ericl/interaction.
---
 .../apache/spark/ml/feature/Interaction.scala | 278 ++++++++++++++++++
 .../spark/ml/feature/InteractionSuite.scala   | 165 +++++++++++
 2 files changed, 443 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
new file mode 100644
index 000000000000..9194763fb32f
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
@@ -0,0 +1,278 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import scala.collection.mutable.ArrayBuilder
+
+import org.apache.spark.SparkException
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml.attribute._
+import org.apache.spark.ml.param._
+import org.apache.spark.ml.param.shared._
+import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.Transformer
+import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
+import org.apache.spark.sql.{DataFrame, Row}
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.types._
+
+/**
+ * :: Experimental ::
+ * Implements the feature interaction transform. This transformer takes in Double and Vector type
+ * columns and outputs a flattened vector of their feature interactions. To handle interaction,
+ * we first one-hot encode any nominal features. Then, a vector of the feature cross-products is
+ * produced.
+ *
+ * For example, given the input feature values `Double(2)` and `Vector(3, 4)`, the output would be
+ * `Vector(6, 8)` if all input features were numeric. If the first feature was instead nominal
+ * with four categories, the output would then be `Vector(0, 0, 0, 0, 3, 4, 0, 0)`.
+ */
+@Experimental
+class Interaction(override val uid: String) extends Transformer
+  with HasInputCols with HasOutputCol {
+
+  def this() = this(Identifiable.randomUID("interaction"))
+
+  /** @group setParam */
+  def setInputCols(values: Array[String]): this.type = set(inputCols, values)
+
+  /** @group setParam */
+  def setOutputCol(value: String): this.type = set(outputCol, value)
+
+  // optimistic schema; does not contain any ML attributes
+  override def transformSchema(schema: StructType): StructType = {
+    validateParams()
+    StructType(schema.fields :+ StructField($(outputCol), new VectorUDT, false))
+  }
+
+  override def transform(dataset: DataFrame): DataFrame = {
+    validateParams()
+    val inputFeatures = $(inputCols).map(c => dataset.schema(c))
+    val featureEncoders = getFeatureEncoders(inputFeatures)
+    val featureAttrs = getFeatureAttrs(inputFeatures)
+
+    def interactFunc = udf { row: Row =>
+      var indices = ArrayBuilder.make[Int]
+      var values = ArrayBuilder.make[Double]
+      var size = 1
+      indices += 0
+      values += 1.0
+      var featureIndex = row.length - 1
+      while (featureIndex >= 0) {
+        val prevIndices = indices.result()
+        val prevValues = values.result()
+        val prevSize = size
+        val currentEncoder = featureEncoders(featureIndex)
+        indices = ArrayBuilder.make[Int]
+        values = ArrayBuilder.make[Double]
+        size *= currentEncoder.outputSize
+        currentEncoder.foreachNonzeroOutput(row(featureIndex), (i, a) => {
+          var j = 0
+          while (j < prevIndices.length) {
+            indices += prevIndices(j) + i * prevSize
+            values += prevValues(j) * a
+            j += 1
+          }
+        })
+        featureIndex -= 1
+      }
+      Vectors.sparse(size, indices.result(), values.result()).compressed
+    }
+
+    val featureCols = inputFeatures.map { f =>
+      f.dataType match {
+        case DoubleType => dataset(f.name)
+        case _: VectorUDT => dataset(f.name)
+        case _: NumericType | BooleanType => dataset(f.name).cast(DoubleType)
+      }
+    }
+    dataset.select(
+      col("*"),
+      interactFunc(struct(featureCols: _*)).as($(outputCol), featureAttrs.toMetadata()))
+  }
+
+  /**
+   * Creates a feature encoder for each input column, which supports efficient iteration over
+   * one-hot encoded feature values. See also the class-level comment of [[FeatureEncoder]].
+   *
+   * @param features The input feature columns to create encoders for.
+   */
+  private def getFeatureEncoders(features: Seq[StructField]): Array[FeatureEncoder] = {
+    def getNumFeatures(attr: Attribute): Int = {
+      attr match {
+        case nominal: NominalAttribute =>
+          math.max(1, nominal.getNumValues.getOrElse(
+            throw new SparkException("Nominal features must have attr numValues defined.")))
+        case _ =>
+          1  // numeric feature
+      }
+    }
+    features.map { f =>
+      val numFeatures = f.dataType match {
+        case _: NumericType | BooleanType =>
+          Array(getNumFeatures(Attribute.fromStructField(f)))
+        case _: VectorUDT =>
+          val attrs = AttributeGroup.fromStructField(f).attributes.getOrElse(
+            throw new SparkException("Vector attributes must be defined for interaction."))
+          attrs.map(getNumFeatures).toArray
+      }
+      new FeatureEncoder(numFeatures)
+    }.toArray
+  }
+
+  /**
+   * Generates ML attributes for the output vector of all feature interactions. We make a best
+   * effort to generate reasonable names for output features, based on the concatenation of the
+   * interacting feature names and values delimited with `_`. When no feature name is specified,
+   * we fall back to using the feature index (e.g. `foo:bar_2_0` may indicate an interaction
+   * between the numeric `foo` feature and a nominal third feature from column `bar`.
+   *
+   * @param features The input feature columns to the Interaction transformer.
+   */
+  private def getFeatureAttrs(features: Seq[StructField]): AttributeGroup = {
+    var featureAttrs: Seq[Attribute] = Nil
+    features.reverse.foreach { f =>
+      val encodedAttrs = f.dataType match {
+        case _: NumericType | BooleanType =>
+          val attr = Attribute.fromStructField(f)
+          encodedFeatureAttrs(Seq(attr), None)
+        case _: VectorUDT =>
+          val group = AttributeGroup.fromStructField(f)
+          encodedFeatureAttrs(group.attributes.get, Some(group.name))
+      }
+      if (featureAttrs.isEmpty) {
+        featureAttrs = encodedAttrs
+      } else {
+        featureAttrs = encodedAttrs.flatMap { head =>
+          featureAttrs.map { tail =>
+            NumericAttribute.defaultAttr.withName(head.name.get + ":" + tail.name.get)
+          }
+        }
+      }
+    }
+    new AttributeGroup($(outputCol), featureAttrs.toArray)
+  }
+
+  /**
+   * Generates the output ML attributes for a single input feature. Each output feature name has
+   * up to three parts: the group name, feature name, and category name (for nominal features),
+   * each separated by an underscore.
+   *
+   * @param inputAttrs The attributes of the input feature.
+   * @param groupName Optional name of the input feature group (for Vector type features).
+   */
+  private def encodedFeatureAttrs(
+      inputAttrs: Seq[Attribute],
+      groupName: Option[String]): Seq[Attribute] = {
+
+    def format(
+        index: Int,
+        attrName: Option[String],
+        categoryName: Option[String]): String = {
+      val parts = Seq(groupName, Some(attrName.getOrElse(index.toString)), categoryName)
+      parts.flatten.mkString("_")
+    }
+
+    inputAttrs.zipWithIndex.flatMap {
+      case (nominal: NominalAttribute, i) =>
+        if (nominal.values.isDefined) {
+          nominal.values.get.map(
+            v => BinaryAttribute.defaultAttr.withName(format(i, nominal.name, Some(v))))
+        } else {
+          Array.tabulate(nominal.getNumValues.get)(
+            j => BinaryAttribute.defaultAttr.withName(format(i, nominal.name, Some(j.toString))))
+        }
+      case (a: Attribute, i) =>
+        Seq(NumericAttribute.defaultAttr.withName(format(i, a.name, None)))
+    }
+  }
+
+  override def copy(extra: ParamMap): Interaction = defaultCopy(extra)
+
+  override def validateParams(): Unit = {
+    require(get(inputCols).isDefined, "Input cols must be defined first.")
+    require(get(outputCol).isDefined, "Output col must be defined first.")
+    require($(inputCols).length > 0, "Input cols must have non-zero length.")
+    require($(inputCols).distinct.length == $(inputCols).length, "Input cols must be distinct.")
+  }
+}
+
+/**
+ * This class performs on-the-fly one-hot encoding of features as you iterate over them. To
+ * indicate which input features should be one-hot encoded, an array of the feature counts
+ * must be passed in ahead of time.
+ *
+ * @param numFeatures Array of feature counts for each input feature. For nominal features this
+ *                    count is equal to the number of categories. For numeric features the count
+ *                    should be set to 1.
+ */
+private[ml] class FeatureEncoder(numFeatures: Array[Int]) {
+  assert(numFeatures.forall(_ > 0), "Features counts must all be positive.")
+
+  /** The size of the output vector. */
+  val outputSize = numFeatures.sum
+
+  /** Precomputed offsets for the location of each output feature. */
+  private val outputOffsets = {
+    val arr = new Array[Int](numFeatures.length)
+    var i = 1
+    while (i < arr.length) {
+      arr(i) = arr(i - 1) + numFeatures(i - 1)
+      i += 1
+    }
+    arr
+  }
+
+  /**
+   * Given an input row of features, invokes the specific function for every non-zero output.
+   *
+   * @param value The row value to encode, either a Double or Vector.
+   * @param f The callback to invoke on each non-zero (index, value) output pair.
+   */
+  def foreachNonzeroOutput(value: Any, f: (Int, Double) => Unit): Unit = value match {
+    case d: Double =>
+      assert(numFeatures.length == 1, "DoubleType columns should only contain one feature.")
+      val numOutputCols = numFeatures.head
+      if (numOutputCols > 1) {
+        assert(
+          d >= 0.0 && d == d.toInt && d < numOutputCols,
+          s"Values from column must be indices, but got $d.")
+        f(d.toInt, 1.0)
+      } else {
+        f(0, d)
+      }
+    case vec: Vector =>
+      assert(numFeatures.length == vec.size,
+        s"Vector column size was ${vec.size}, expected ${numFeatures.length}")
+      vec.foreachActive { (i, v) =>
+        val numOutputCols = numFeatures(i)
+        if (numOutputCols > 1) {
+          assert(
+            v >= 0.0 && v == v.toInt && v < numOutputCols,
+            s"Values from column must be indices, but got $v.")
+          f(outputOffsets(i) + v.toInt, 1.0)
+        } else {
+          f(outputOffsets(i), v)
+        }
+      }
+    case null =>
+      throw new SparkException("Values to interact cannot be null.")
+    case o =>
+      throw new SparkException(s"$o of type ${o.getClass.getName} is not supported.")
+  }
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala
new file mode 100644
index 000000000000..2beb62ca0823
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala
@@ -0,0 +1,165 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import scala.collection.mutable.ArrayBuilder
+
+import org.apache.spark.{SparkException, SparkFunSuite}
+import org.apache.spark.ml.attribute._
+import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.sql.functions.col
+
+class InteractionSuite extends SparkFunSuite with MLlibTestSparkContext {
+  test("params") {
+    ParamsSuite.checkParams(new Interaction())
+  }
+
+  test("feature encoder") {
+    def encode(cardinalities: Array[Int], value: Any): Vector = {
+      var indices = ArrayBuilder.make[Int]
+      var values = ArrayBuilder.make[Double]
+      val encoder = new FeatureEncoder(cardinalities)
+      encoder.foreachNonzeroOutput(value, (i, v) => {
+        indices += i
+        values += v
+      })
+      Vectors.sparse(encoder.outputSize, indices.result(), values.result()).compressed
+    }
+    assert(encode(Array(1), 2.2) === Vectors.dense(2.2))
+    assert(encode(Array(3), Vectors.dense(1)) === Vectors.dense(0, 1, 0))
+    assert(encode(Array(1, 1), Vectors.dense(1.1, 2.2)) === Vectors.dense(1.1, 2.2))
+    assert(encode(Array(3, 1), Vectors.dense(1, 2.2)) === Vectors.dense(0, 1, 0, 2.2))
+    assert(encode(Array(2, 1), Vectors.dense(1, 2.2)) === Vectors.dense(0, 1, 2.2))
+    assert(encode(Array(2, 1, 1), Vectors.dense(0, 2.2, 0)) === Vectors.dense(1, 0, 2.2, 0))
+    intercept[SparkException] { encode(Array(1), "foo") }
+    intercept[SparkException] { encode(Array(1), null) }
+    intercept[AssertionError] { encode(Array(2), 2.2) }
+    intercept[AssertionError] { encode(Array(3), Vectors.dense(2.2)) }
+    intercept[AssertionError] { encode(Array(1), Vectors.dense(1.0, 2.0, 3.0)) }
+    intercept[AssertionError] { encode(Array(3), Vectors.dense(-1)) }
+    intercept[AssertionError] { encode(Array(3), Vectors.dense(3)) }
+  }
+
+  test("numeric interaction") {
+    val data = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(3.0, 4.0)),
+        (1, Vectors.dense(1.0, 5.0)))
+      ).toDF("a", "b")
+    val groupAttr = new AttributeGroup(
+      "b",
+      Array[Attribute](
+        NumericAttribute.defaultAttr.withName("foo"),
+        NumericAttribute.defaultAttr.withName("bar")))
+    val df = data.select(
+      col("a").as("a", NumericAttribute.defaultAttr.toMetadata()),
+      col("b").as("b", groupAttr.toMetadata()))
+    val trans = new Interaction().setInputCols(Array("a", "b")).setOutputCol("features")
+    val res = trans.transform(df)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(3.0, 4.0), Vectors.dense(6.0, 8.0)),
+        (1, Vectors.dense(1.0, 5.0), Vectors.dense(1.0, 5.0)))
+      ).toDF("a", "b", "features")
+    assert(res.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(res.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](
+        new NumericAttribute(Some("a:b_foo"), Some(1)),
+        new NumericAttribute(Some("a:b_bar"), Some(2))))
+    assert(attrs === expectedAttrs)
+  }
+
+  test("nominal interaction") {
+    val data = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(3.0, 4.0)),
+        (1, Vectors.dense(1.0, 5.0)))
+      ).toDF("a", "b")
+    val groupAttr = new AttributeGroup(
+      "b",
+      Array[Attribute](
+        NumericAttribute.defaultAttr.withName("foo"),
+        NumericAttribute.defaultAttr.withName("bar")))
+    val df = data.select(
+      col("a").as(
+        "a", NominalAttribute.defaultAttr.withValues(Array("up", "down", "left")).toMetadata()),
+      col("b").as("b", groupAttr.toMetadata()))
+    val trans = new Interaction().setInputCols(Array("a", "b")).setOutputCol("features")
+    val res = trans.transform(df)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(3.0, 4.0), Vectors.dense(0, 0, 0, 0, 3, 4)),
+        (1, Vectors.dense(1.0, 5.0), Vectors.dense(0, 0, 1, 5, 0, 0)))
+      ).toDF("a", "b", "features")
+    assert(res.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(res.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](
+        new NumericAttribute(Some("a_up:b_foo"), Some(1)),
+        new NumericAttribute(Some("a_up:b_bar"), Some(2)),
+        new NumericAttribute(Some("a_down:b_foo"), Some(3)),
+        new NumericAttribute(Some("a_down:b_bar"), Some(4)),
+        new NumericAttribute(Some("a_left:b_foo"), Some(5)),
+        new NumericAttribute(Some("a_left:b_bar"), Some(6))))
+    assert(attrs === expectedAttrs)
+  }
+
+  test("default attr names") {
+    val data = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(0.0, 4.0), 1.0),
+        (1, Vectors.dense(1.0, 5.0), 10.0))
+      ).toDF("a", "b", "c")
+    val groupAttr = new AttributeGroup(
+      "b",
+      Array[Attribute](
+        NominalAttribute.defaultAttr.withNumValues(2),
+        NumericAttribute.defaultAttr))
+    val df = data.select(
+      col("a").as("a", NominalAttribute.defaultAttr.withNumValues(3).toMetadata()),
+      col("b").as("b", groupAttr.toMetadata()),
+      col("c").as("c", NumericAttribute.defaultAttr.toMetadata()))
+    val trans = new Interaction().setInputCols(Array("a", "b", "c")).setOutputCol("features")
+    val res = trans.transform(df)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (2, Vectors.dense(0.0, 4.0), 1.0, Vectors.dense(0, 0, 0, 0, 0, 0, 1, 0, 4)),
+        (1, Vectors.dense(1.0, 5.0), 10.0, Vectors.dense(0, 0, 0, 0, 10, 50, 0, 0, 0)))
+      ).toDF("a", "b", "c", "features")
+    assert(res.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(res.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](
+        new NumericAttribute(Some("a_0:b_0_0:c"), Some(1)),
+        new NumericAttribute(Some("a_0:b_0_1:c"), Some(2)),
+        new NumericAttribute(Some("a_0:b_1:c"), Some(3)),
+        new NumericAttribute(Some("a_1:b_0_0:c"), Some(4)),
+        new NumericAttribute(Some("a_1:b_0_1:c"), Some(5)),
+        new NumericAttribute(Some("a_1:b_1:c"), Some(6)),
+        new NumericAttribute(Some("a_2:b_0_0:c"), Some(7)),
+        new NumericAttribute(Some("a_2:b_0_1:c"), Some(8)),
+        new NumericAttribute(Some("a_2:b_1:c"), Some(9))))
+    assert(attrs === expectedAttrs)
+  }
+}

From 0f5ef6dfa67a068606aff8ea9d1addfce73446eb Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 17 Sep 2015 19:16:34 -0700
Subject: [PATCH 020/896] [SPARK-10674] [TESTS] Increase timeouts in
 SaslIntegrationSuite.

1s seems to trigger too many times on the jenkins build boxes, so
increase the timeout and cross fingers.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8802 from vanzin/SPARK-10674 and squashes the following commits:

3c93117 [Marcelo Vanzin] Use java 7 syntax.
d667d1b [Marcelo Vanzin] [SPARK-10674] [tests] Increase timeouts in SaslIntegrationSuite.
---
 .../spark/network/sasl/SaslIntegrationSuite.java  | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
index 5cb0e4d4a645..c393a5e1e681 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
@@ -56,6 +56,11 @@
 import org.apache.spark.network.util.TransportConf;
 
 public class SaslIntegrationSuite {
+
+  // Use a long timeout to account for slow / overloaded build machines. In the normal case,
+  // tests should finish way before the timeout expires.
+  private final static long TIMEOUT_MS = 10_000;
+
   static TransportServer server;
   static TransportConf conf;
   static TransportContext context;
@@ -102,7 +107,7 @@ public void testGoodClient() throws IOException {
 
     TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
     String msg = "Hello, World!";
-    byte[] resp = client.sendRpcSync(msg.getBytes(), 1000);
+    byte[] resp = client.sendRpcSync(msg.getBytes(), TIMEOUT_MS);
     assertEquals(msg, new String(resp)); // our rpc handler should just return the given msg
   }
 
@@ -131,7 +136,7 @@ public void testNoSaslClient() throws IOException {
 
     TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
     try {
-      client.sendRpcSync(new byte[13], 1000);
+      client.sendRpcSync(new byte[13], TIMEOUT_MS);
       fail("Should have failed");
     } catch (Exception e) {
       assertTrue(e.getMessage(), e.getMessage().contains("Expected SaslMessage"));
@@ -139,7 +144,7 @@ public void testNoSaslClient() throws IOException {
 
     try {
       // Guessing the right tag byte doesn't magically get you in...
-      client.sendRpcSync(new byte[] { (byte) 0xEA }, 1000);
+      client.sendRpcSync(new byte[] { (byte) 0xEA }, TIMEOUT_MS);
       fail("Should have failed");
     } catch (Exception e) {
       assertTrue(e.getMessage(), e.getMessage().contains("java.lang.IndexOutOfBoundsException"));
@@ -217,12 +222,12 @@ public synchronized void onBlockFetchFailure(String blockId, Throwable t) {
         new String[] { System.getProperty("java.io.tmpdir") }, 1,
         "org.apache.spark.shuffle.sort.SortShuffleManager");
       RegisterExecutor regmsg = new RegisterExecutor("app-1", "0", executorInfo);
-      client1.sendRpcSync(regmsg.toByteArray(), 10000);
+      client1.sendRpcSync(regmsg.toByteArray(), TIMEOUT_MS);
 
       // Make a successful request to fetch blocks, which creates a new stream. But do not actually
       // fetch any blocks, to keep the stream open.
       OpenBlocks openMessage = new OpenBlocks("app-1", "0", blockIds);
-      byte[] response = client1.sendRpcSync(openMessage.toByteArray(), 10000);
+      byte[] response = client1.sendRpcSync(openMessage.toByteArray(), TIMEOUT_MS);
       StreamHandle stream = (StreamHandle) BlockTransferMessage.Decoder.fromByteArray(response);
       long streamId = stream.streamId;
 

From 98f1ea67da1b0e3aa791c3cbfa06e48e2ba0d75b Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 17 Sep 2015 21:37:10 -0700
Subject: [PATCH 021/896] [SPARK-8518] [ML] Log-linear models for survival
 analysis

[Accelerated Failure Time (AFT) model](https://en.wikipedia.org/wiki/Accelerated_failure_time_model) is the most commonly used and easy to parallel method of survival analysis for censored survival data. It is the log-linear model based on the Weibull distribution of the survival time.
Users can refer to the R function [```survreg```](https://stat.ethz.ch/R-manual/R-devel/library/survival/html/survreg.html) to compare the model and [```predict```](https://stat.ethz.ch/R-manual/R-devel/library/survival/html/predict.survreg.html) to compare the prediction. There are different kinds of model prediction, I have just select the type ```response``` which is default used for R.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8611 from yanboliang/spark-8518.
---
 .../ml/regression/AFTSurvivalRegression.scala | 449 ++++++++++++++++++
 .../AFTSurvivalRegressionSuite.scala          | 311 ++++++++++++
 2 files changed, 760 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
new file mode 100644
index 000000000000..5b25db651f56
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -0,0 +1,449 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.regression
+
+import scala.collection.mutable
+
+import breeze.linalg.{DenseVector => BDV}
+import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS}
+
+import org.apache.spark.{SparkException, Logging}
+import org.apache.spark.annotation.{Since, Experimental}
+import org.apache.spark.ml.{Model, Estimator}
+import org.apache.spark.ml.param._
+import org.apache.spark.ml.param.shared._
+import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
+import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
+import org.apache.spark.mllib.linalg.BLAS
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.{Row, DataFrame}
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.types.{DoubleType, StructType}
+import org.apache.spark.storage.StorageLevel
+
+/**
+ * Params for accelerated failure time (AFT) regression.
+ */
+private[regression] trait AFTSurvivalRegressionParams extends Params
+  with HasFeaturesCol with HasLabelCol with HasPredictionCol with HasMaxIter
+  with HasTol with HasFitIntercept {
+
+  /**
+   * Param for censor column name.
+   * The value of this column could be 0 or 1.
+   * If the value is 1, it means the event has occurred i.e. uncensored; otherwise censored.
+   * @group param
+   */
+  @Since("1.6.0")
+  final val censorCol: Param[String] = new Param(this, "censorCol", "censor column name")
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getCensorCol: String = $(censorCol)
+  setDefault(censorCol -> "censor")
+
+  /**
+   * Param for quantile probabilities array.
+   * Values of the quantile probabilities array should be in the range [0, 1].
+   * @group param
+   */
+  @Since("1.6.0")
+  final val quantileProbabilities: DoubleArrayParam = new DoubleArrayParam(this,
+    "quantileProbabilities", "quantile probabilities array",
+    (t: Array[Double]) => t.forall(ParamValidators.inRange(0, 1)))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getQuantileProbabilities: Array[Double] = $(quantileProbabilities)
+
+  /** Checks whether the input has quantile probabilities array. */
+  protected[regression] def hasQuantileProbabilities: Boolean = {
+    isDefined(quantileProbabilities) && $(quantileProbabilities).size != 0
+  }
+
+  /**
+   * Validates and transforms the input schema with the provided param map.
+   * @param schema input schema
+   * @param fitting whether this is in fitting or prediction
+   * @return output schema
+   */
+  protected def validateAndTransformSchema(
+      schema: StructType,
+      fitting: Boolean): StructType = {
+    SchemaUtils.checkColumnType(schema, $(featuresCol), new VectorUDT)
+    if (fitting) {
+      SchemaUtils.checkColumnType(schema, $(censorCol), DoubleType)
+      SchemaUtils.checkColumnType(schema, $(labelCol), DoubleType)
+    }
+    SchemaUtils.appendColumn(schema, $(predictionCol), DoubleType)
+  }
+}
+
+/**
+ * :: Experimental ::
+ * Fit a parametric survival regression model named accelerated failure time (AFT) model
+ * ([[https://en.wikipedia.org/wiki/Accelerated_failure_time_model]])
+ * based on the Weibull distribution of the survival time.
+ */
+@Experimental
+@Since("1.6.0")
+class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: String)
+  extends Estimator[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams with Logging {
+
+  @Since("1.6.0")
+  def this() = this(Identifiable.randomUID("aftSurvReg"))
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setLabelCol(value: String): this.type = set(labelCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setCensorCol(value: String): this.type = set(censorCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setPredictionCol(value: String): this.type = set(predictionCol, value)
+
+  /**
+   * Set if we should fit the intercept
+   * Default is true.
+   * @group setParam
+   */
+  @Since("1.6.0")
+  def setFitIntercept(value: Boolean): this.type = set(fitIntercept, value)
+  setDefault(fitIntercept -> true)
+
+  /**
+   * Set the maximum number of iterations.
+   * Default is 100.
+   * @group setParam
+   */
+  @Since("1.6.0")
+  def setMaxIter(value: Int): this.type = set(maxIter, value)
+  setDefault(maxIter -> 100)
+
+  /**
+   * Set the convergence tolerance of iterations.
+   * Smaller value will lead to higher accuracy with the cost of more iterations.
+   * Default is 1E-6.
+   * @group setParam
+   */
+  @Since("1.6.0")
+  def setTol(value: Double): this.type = set(tol, value)
+  setDefault(tol -> 1E-6)
+
+  /**
+   * Extract [[featuresCol]], [[labelCol]] and [[censorCol]] from input dataset,
+   * and put it in an RDD with strong types.
+   */
+  protected[ml] def extractAFTPoints(dataset: DataFrame): RDD[AFTPoint] = {
+    dataset.select($(featuresCol), $(labelCol), $(censorCol)).map {
+      case Row(features: Vector, label: Double, censor: Double) =>
+        AFTPoint(features, label, censor)
+    }
+  }
+
+  @Since("1.6.0")
+  override def fit(dataset: DataFrame): AFTSurvivalRegressionModel = {
+    validateAndTransformSchema(dataset.schema, fitting = true)
+    val instances = extractAFTPoints(dataset)
+    val handlePersistence = dataset.rdd.getStorageLevel == StorageLevel.NONE
+    if (handlePersistence) instances.persist(StorageLevel.MEMORY_AND_DISK)
+
+    val costFun = new AFTCostFun(instances, $(fitIntercept))
+    val optimizer = new BreezeLBFGS[BDV[Double]]($(maxIter), 10, $(tol))
+
+    val numFeatures = dataset.select($(featuresCol)).take(1)(0).getAs[Vector](0).size
+    /*
+       The weights vector has three parts:
+       the first element: Double, log(sigma), the log of scale parameter
+       the second element: Double, intercept of the beta parameter
+       the third to the end elements: Doubles, regression coefficients vector of the beta parameter
+     */
+    val initialWeights = Vectors.zeros(numFeatures + 2)
+
+    val states = optimizer.iterations(new CachedDiffFunction(costFun),
+      initialWeights.toBreeze.toDenseVector)
+
+    val weights = {
+      val arrayBuilder = mutable.ArrayBuilder.make[Double]
+      var state: optimizer.State = null
+      while (states.hasNext) {
+        state = states.next()
+        arrayBuilder += state.adjustedValue
+      }
+      if (state == null) {
+        val msg = s"${optimizer.getClass.getName} failed."
+        throw new SparkException(msg)
+      }
+
+      state.x.toArray.clone()
+    }
+
+    if (handlePersistence) instances.unpersist()
+
+    val coefficients = Vectors.dense(weights.slice(2, weights.length))
+    val intercept = weights(1)
+    val scale = math.exp(weights(0))
+    val model = new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale)
+    copyValues(model.setParent(this))
+  }
+
+  @Since("1.6.0")
+  override def transformSchema(schema: StructType): StructType = {
+    validateAndTransformSchema(schema, fitting = true)
+  }
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): AFTSurvivalRegression = defaultCopy(extra)
+}
+
+/**
+ * :: Experimental ::
+ * Model produced by [[AFTSurvivalRegression]].
+ */
+@Experimental
+@Since("1.6.0")
+class AFTSurvivalRegressionModel private[ml] (
+    @Since("1.6.0") override val uid: String,
+    @Since("1.6.0") val coefficients: Vector,
+    @Since("1.6.0") val intercept: Double,
+    @Since("1.6.0") val scale: Double)
+  extends Model[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams {
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setPredictionCol(value: String): this.type = set(predictionCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setQuantileProbabilities(value: Array[Double]): this.type = set(quantileProbabilities, value)
+
+  @Since("1.6.0")
+  def predictQuantiles(features: Vector): Vector = {
+    require(hasQuantileProbabilities,
+      "AFTSurvivalRegressionModel predictQuantiles must set quantile probabilities array")
+    // scale parameter for the Weibull distribution of lifetime
+    val lambda = math.exp(BLAS.dot(coefficients, features) + intercept)
+    // shape parameter for the Weibull distribution of lifetime
+    val k = 1 / scale
+    val quantiles = $(quantileProbabilities).map {
+      q => lambda * math.exp(math.log(-math.log(1 - q)) / k)
+    }
+    Vectors.dense(quantiles)
+  }
+
+  @Since("1.6.0")
+  def predict(features: Vector): Double = {
+    math.exp(BLAS.dot(coefficients, features) + intercept)
+  }
+
+  @Since("1.6.0")
+  override def transform(dataset: DataFrame): DataFrame = {
+    transformSchema(dataset.schema)
+    val predictUDF = udf { features: Vector => predict(features) }
+    dataset.withColumn($(predictionCol), predictUDF(col($(featuresCol))))
+  }
+
+  @Since("1.6.0")
+  override def transformSchema(schema: StructType): StructType = {
+    validateAndTransformSchema(schema, fitting = false)
+  }
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): AFTSurvivalRegressionModel = {
+    copyValues(new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale), extra)
+      .setParent(parent)
+  }
+}
+
+/**
+ * AFTAggregator computes the gradient and loss for a AFT loss function,
+ * as used in AFT survival regression for samples in sparse or dense vector in a online fashion.
+ *
+ * The loss function and likelihood function under the AFT model based on:
+ * Lawless, J. F., Statistical Models and Methods for Lifetime Data,
+ * New York: John Wiley & Sons, Inc. 2003.
+ *
+ * Two AFTAggregator can be merged together to have a summary of loss and gradient of
+ * the corresponding joint dataset.
+ *
+ * Given the values of the covariates x^{'}, for random lifetime t_{i} of subjects i = 1, ..., n,
+ * with possible right-censoring, the likelihood function under the AFT model is given as
+ * {{{
+ *   L(\beta,\sigma)=\prod_{i=1}^n[\frac{1}{\sigma}f_{0}
+ *   (\frac{\log{t_{i}}-x^{'}\beta}{\sigma})]^{\delta_{i}}S_{0}
+ *   (\frac{\log{t_{i}}-x^{'}\beta}{\sigma})^{1-\delta_{i}}
+ * }}}
+ * Where \delta_{i} is the indicator of the event has occurred i.e. uncensored or not.
+ * Using \epsilon_{i}=\frac{\log{t_{i}}-x^{'}\beta}{\sigma}, the log-likelihood function
+ * assumes the form
+ * {{{
+ *   \iota(\beta,\sigma)=\sum_{i=1}^{n}[-\delta_{i}\log\sigma+
+ *   \delta_{i}\log{f_{0}}(\epsilon_{i})+(1-\delta_{i})\log{S_{0}(\epsilon_{i})}]
+ * }}}
+ * Where S_{0}(\epsilon_{i}) is the baseline survivor function,
+ * and f_{0}(\epsilon_{i}) is corresponding density function.
+ *
+ * The most commonly used log-linear survival regression method is based on the Weibull
+ * distribution of the survival time. The Weibull distribution for lifetime corresponding
+ * to extreme value distribution for log of the lifetime,
+ * and the S_{0}(\epsilon) function is
+ * {{{
+ *   S_{0}(\epsilon_{i})=\exp(-e^{\epsilon_{i}})
+ * }}}
+ * the f_{0}(\epsilon_{i}) function is
+ * {{{
+ *   f_{0}(\epsilon_{i})=e^{\epsilon_{i}}\exp(-e^{\epsilon_{i}})
+ * }}}
+ * The log-likelihood function for Weibull distribution of lifetime is
+ * {{{
+ *   \iota(\beta,\sigma)=
+ *   -\sum_{i=1}^n[\delta_{i}\log\sigma-\delta_{i}\epsilon_{i}+e^{\epsilon_{i}}]
+ * }}}
+ * Due to minimizing the negative log-likelihood equivalent to maximum a posteriori probability,
+ * the loss function we use to optimize is -\iota(\beta,\sigma).
+ * The gradient functions for \beta and \log\sigma respectively are
+ * {{{
+ *   \frac{\partial (-\iota)}{\partial \beta}=
+ *   \sum_{1=1}^{n}[\delta_{i}-e^{\epsilon_{i}}]\frac{x_{i}}{\sigma}
+ * }}}
+ * {{{
+ *   \frac{\partial (-\iota)}{\partial (\log\sigma)}=
+ *   \sum_{i=1}^{n}[\delta_{i}+(\delta_{i}-e^{\epsilon_{i}})\epsilon_{i}]
+ * }}}
+ * @param weights The log of scale parameter, the intercept and
+ *                regression coefficients corresponding to the features.
+ * @param fitIntercept Whether to fit an intercept term.
+ */
+private class AFTAggregator(weights: BDV[Double], fitIntercept: Boolean)
+  extends Serializable {
+
+  // beta is the intercept and regression coefficients to the covariates
+  private val beta = weights.slice(1, weights.length)
+  // sigma is the scale parameter of the AFT model
+  private val sigma = math.exp(weights(0))
+
+  private var totalCnt: Long = 0L
+  private var lossSum = 0.0
+  private var gradientBetaSum = BDV.zeros[Double](beta.length)
+  private var gradientLogSigmaSum = 0.0
+
+  def count: Long = totalCnt
+
+  def loss: Double = if (totalCnt == 0) 1.0 else lossSum / totalCnt
+
+  // Here we optimize loss function over beta and log(sigma)
+  def gradient: BDV[Double] = BDV.vertcat(BDV(Array(gradientLogSigmaSum / totalCnt.toDouble)),
+    gradientBetaSum/totalCnt.toDouble)
+
+  /**
+   * Add a new training data to this AFTAggregator, and update the loss and gradient
+   * of the objective function.
+   *
+   * @param data The AFTPoint representation for one data point to be added into this aggregator.
+   * @return This AFTAggregator object.
+   */
+  def add(data: AFTPoint): this.type = {
+
+    // TODO: Don't create a new xi vector each time.
+    val xi = if (fitIntercept) {
+      Vectors.dense(Array(1.0) ++ data.features.toArray).toBreeze
+    } else {
+      Vectors.dense(Array(0.0) ++ data.features.toArray).toBreeze
+    }
+    val ti = data.label
+    val delta = data.censor
+    val epsilon = (math.log(ti) - beta.dot(xi)) / sigma
+
+    lossSum += math.log(sigma) * delta
+    lossSum += (math.exp(epsilon) - delta * epsilon)
+
+    // Sanity check (should never occur):
+    assert(!lossSum.isInfinity,
+      s"AFTAggregator loss sum is infinity. Error for unknown reason.")
+
+    gradientBetaSum += xi * (delta - math.exp(epsilon)) / sigma
+    gradientLogSigmaSum += delta + (delta - math.exp(epsilon)) * epsilon
+
+    totalCnt += 1
+    this
+  }
+
+  /**
+   * Merge another AFTAggregator, and update the loss and gradient
+   * of the objective function.
+   * (Note that it's in place merging; as a result, `this` object will be modified.)
+   *
+   * @param other The other AFTAggregator to be merged.
+   * @return This AFTAggregator object.
+   */
+  def merge(other: AFTAggregator): this.type = {
+    if (totalCnt != 0) {
+      totalCnt += other.totalCnt
+      lossSum += other.lossSum
+
+      gradientBetaSum += other.gradientBetaSum
+      gradientLogSigmaSum += other.gradientLogSigmaSum
+    }
+    this
+  }
+}
+
+/**
+ * AFTCostFun implements Breeze's DiffFunction[T] for AFT cost.
+ * It returns the loss and gradient at a particular point (coefficients).
+ * It's used in Breeze's convex optimization routines.
+ */
+private class AFTCostFun(data: RDD[AFTPoint], fitIntercept: Boolean)
+  extends DiffFunction[BDV[Double]] {
+
+  override def calculate(coefficients: BDV[Double]): (Double, BDV[Double]) = {
+
+    val aftAggregator = data.treeAggregate(new AFTAggregator(coefficients, fitIntercept))(
+      seqOp = (c, v) => (c, v) match {
+        case (aggregator, instance) => aggregator.add(instance)
+      },
+      combOp = (c1, c2) => (c1, c2) match {
+        case (aggregator1, aggregator2) => aggregator1.merge(aggregator2)
+      })
+
+    (aftAggregator.loss, aftAggregator.gradient)
+  }
+}
+
+/**
+ * Class that represents the (features, label, censor) of a data point.
+ *
+ * @param features List of features for this data point.
+ * @param label Label for this data point.
+ * @param censor Indicator of the event has occurred or not. If the value is 1, it means
+ *                 the event has occurred i.e. uncensored; otherwise censored.
+ */
+private[regression] case class AFTPoint(features: Vector, label: Double, censor: Double) {
+  require(censor == 1.0 || censor == 0.0, "censor of class AFTPoint must be 1.0 or 0.0")
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
new file mode 100644
index 000000000000..ca7140a45ea6
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
@@ -0,0 +1,311 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.regression
+
+import scala.util.Random
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.mllib.linalg.{DenseVector, Vectors}
+import org.apache.spark.mllib.linalg.BLAS
+import org.apache.spark.mllib.random.{ExponentialGenerator, WeibullGenerator}
+import org.apache.spark.mllib.util.TestingUtils._
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.sql.{Row, DataFrame}
+
+class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
+
+  @transient var datasetUnivariate: DataFrame = _
+  @transient var datasetMultivariate: DataFrame = _
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+    datasetUnivariate = sqlContext.createDataFrame(
+      sc.parallelize(generateAFTInput(
+        1, Array(5.5), Array(0.8), 1000, 42, 1.0, 2.0, 2.0)))
+    datasetMultivariate = sqlContext.createDataFrame(
+      sc.parallelize(generateAFTInput(
+        2, Array(0.9, -1.3), Array(0.7, 1.2), 1000, 42, 1.5, 2.5, 2.0)))
+  }
+
+  test("params") {
+    ParamsSuite.checkParams(new AFTSurvivalRegression)
+    val model = new AFTSurvivalRegressionModel("aftSurvReg", Vectors.dense(0.0), 0.0, 0.0)
+    ParamsSuite.checkParams(model)
+  }
+
+  test("aft survival regression: default params") {
+    val aftr = new AFTSurvivalRegression
+    assert(aftr.getLabelCol === "label")
+    assert(aftr.getFeaturesCol === "features")
+    assert(aftr.getPredictionCol === "prediction")
+    assert(aftr.getCensorCol === "censor")
+    assert(aftr.getFitIntercept)
+    assert(aftr.getMaxIter === 100)
+    assert(aftr.getTol === 1E-6)
+    val model = aftr.fit(datasetUnivariate)
+
+    // copied model must have the same parent.
+    MLTestingUtils.checkCopy(model)
+
+    model.transform(datasetUnivariate)
+      .select("label", "prediction")
+      .collect()
+    assert(model.getFeaturesCol === "features")
+    assert(model.getPredictionCol === "prediction")
+    assert(model.intercept !== 0.0)
+    assert(model.hasParent)
+  }
+
+  def generateAFTInput(
+      numFeatures: Int,
+      xMean: Array[Double],
+      xVariance: Array[Double],
+      nPoints: Int,
+      seed: Int,
+      weibullShape: Double,
+      weibullScale: Double,
+      exponentialMean: Double): Seq[AFTPoint] = {
+
+    def censor(x: Double, y: Double): Double = { if (x <= y) 1.0 else 0.0 }
+
+    val weibull = new WeibullGenerator(weibullShape, weibullScale)
+    weibull.setSeed(seed)
+
+    val exponential = new ExponentialGenerator(exponentialMean)
+    exponential.setSeed(seed)
+
+    val rnd = new Random(seed)
+    val x = Array.fill[Array[Double]](nPoints)(Array.fill[Double](numFeatures)(rnd.nextDouble()))
+
+    x.foreach { v =>
+      var i = 0
+      val len = v.length
+      while (i < len) {
+        v(i) = (v(i) - 0.5) * math.sqrt(12.0 * xVariance(i)) + xMean(i)
+        i += 1
+      }
+    }
+    val y = (1 to nPoints).map { i => (weibull.nextValue(), exponential.nextValue()) }
+
+    y.zip(x).map { p => AFTPoint(Vectors.dense(p._2), p._1._1, censor(p._1._1, p._1._2)) }
+  }
+
+  test("aft survival regression with univariate") {
+    val trainer = new AFTSurvivalRegression
+    val model = trainer.fit(datasetUnivariate)
+
+    /*
+       Using the following R code to load the data and train the model using survival package.
+
+       library("survival")
+       data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
+       features <- data$V1
+       censor <- data$V2
+       label <- data$V3
+       sr.fit <- survreg(Surv(label, censor) ~ features, dist='weibull')
+       summary(sr.fit)
+
+                    Value Std. Error      z        p
+       (Intercept)  1.759     0.4141  4.247 2.16e-05
+       features    -0.039     0.0735 -0.531 5.96e-01
+       Log(scale)   0.344     0.0379  9.073 1.16e-19
+
+       Scale= 1.41
+
+       Weibull distribution
+       Loglik(model)= -1152.2   Loglik(intercept only)= -1152.3
+           Chisq= 0.28 on 1 degrees of freedom, p= 0.6
+       Number of Newton-Raphson Iterations: 5
+       n= 1000
+     */
+    val coefficientsR = Vectors.dense(-0.039)
+    val interceptR = 1.759
+    val scaleR = 1.41
+
+    assert(model.intercept ~== interceptR relTol 1E-3)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.scale ~== scaleR relTol 1E-3)
+
+    /*
+       Using the following R code to predict.
+
+       testdata <- list(features=6.559282795753792)
+       responsePredict <- predict(sr.fit, newdata=testdata)
+       responsePredict
+
+              1
+       4.494763
+
+       quantilePredict <- predict(sr.fit, newdata=testdata, type='quantile', p=c(0.1, 0.5, 0.9))
+       quantilePredict
+
+       [1]  0.1879174  2.6801195 14.5779394
+     */
+    val features = Vectors.dense(6.559282795753792)
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val responsePredictR = 4.494763
+    val quantilePredictR = Vectors.dense(0.1879174, 2.6801195, 14.5779394)
+
+    assert(model.predict(features) ~== responsePredictR relTol 1E-3)
+    model.setQuantileProbabilities(quantileProbabilities)
+    assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
+
+    model.transform(datasetUnivariate).select("features", "prediction").collect().foreach {
+      case Row(features: DenseVector, prediction1: Double) =>
+        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
+        assert(prediction1 ~== prediction2 relTol 1E-5)
+    }
+  }
+
+  test("aft survival regression with multivariate") {
+    val trainer = new AFTSurvivalRegression
+    val model = trainer.fit(datasetMultivariate)
+
+    /*
+       Using the following R code to load the data and train the model using survival package.
+
+       library("survival")
+       data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
+       feature1 <- data$V1
+       feature2 <- data$V2
+       censor <- data$V3
+       label <- data$V4
+       sr.fit <- survreg(Surv(label, censor) ~ feature1 + feature2, dist='weibull')
+       summary(sr.fit)
+
+                     Value Std. Error      z        p
+       (Intercept)  1.9206     0.1057 18.171 8.78e-74
+       feature1    -0.0844     0.0611 -1.381 1.67e-01
+       feature2     0.0677     0.0468  1.447 1.48e-01
+       Log(scale)  -0.0236     0.0436 -0.542 5.88e-01
+
+       Scale= 0.977
+
+       Weibull distribution
+       Loglik(model)= -1070.7   Loglik(intercept only)= -1072.7
+           Chisq= 3.91 on 2 degrees of freedom, p= 0.14
+       Number of Newton-Raphson Iterations: 5
+       n= 1000
+     */
+    val coefficientsR = Vectors.dense(-0.0844, 0.0677)
+    val interceptR = 1.9206
+    val scaleR = 0.977
+
+    assert(model.intercept ~== interceptR relTol 1E-3)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.scale ~== scaleR relTol 1E-3)
+
+    /*
+       Using the following R code to predict.
+       testdata <- list(feature1=2.233396950271428, feature2=-2.5321374085997683)
+       responsePredict <- predict(sr.fit, newdata=testdata)
+       responsePredict
+
+              1
+       4.761219
+
+       quantilePredict <- predict(sr.fit, newdata=testdata, type='quantile', p=c(0.1, 0.5, 0.9))
+       quantilePredict
+
+       [1]  0.5287044  3.3285858 10.7517072
+     */
+    val features = Vectors.dense(2.233396950271428, -2.5321374085997683)
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val responsePredictR = 4.761219
+    val quantilePredictR = Vectors.dense(0.5287044, 3.3285858, 10.7517072)
+
+    assert(model.predict(features) ~== responsePredictR relTol 1E-3)
+    model.setQuantileProbabilities(quantileProbabilities)
+    assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
+
+    model.transform(datasetMultivariate).select("features", "prediction").collect().foreach {
+      case Row(features: DenseVector, prediction1: Double) =>
+        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
+        assert(prediction1 ~== prediction2 relTol 1E-5)
+    }
+  }
+
+  test("aft survival regression w/o intercept") {
+    val trainer = new AFTSurvivalRegression().setFitIntercept(false)
+    val model = trainer.fit(datasetMultivariate)
+
+    /*
+       Using the following R code to load the data and train the model using survival package.
+
+       library("survival")
+       data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
+       feature1 <- data$V1
+       feature2 <- data$V2
+       censor <- data$V3
+       label <- data$V4
+       sr.fit <- survreg(Surv(label, censor) ~ feature1 + feature2 - 1, dist='weibull')
+       summary(sr.fit)
+
+                   Value Std. Error     z        p
+       feature1    0.896     0.0685  13.1 3.93e-39
+       feature2   -0.709     0.0522 -13.6 5.78e-42
+       Log(scale)  0.420     0.0401  10.5 1.23e-25
+
+       Scale= 1.52
+
+       Weibull distribution
+       Loglik(model)= -1292.4   Loglik(intercept only)= -1072.7
+         Chisq= -439.57 on 1 degrees of freedom, p= 1
+       Number of Newton-Raphson Iterations: 6
+       n= 1000
+     */
+    val coefficientsR = Vectors.dense(0.896, -0.709)
+    val interceptR = 0.0
+    val scaleR = 1.52
+
+    assert(model.intercept === interceptR)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.scale ~== scaleR relTol 1E-3)
+
+    /*
+       Using the following R code to predict.
+       testdata <- list(feature1=2.233396950271428, feature2=-2.5321374085997683)
+       responsePredict <- predict(sr.fit, newdata=testdata)
+       responsePredict
+
+              1
+       44.54465
+
+       quantilePredict <- predict(sr.fit, newdata=testdata, type='quantile', p=c(0.1, 0.5, 0.9))
+       quantilePredict
+
+       [1]   1.452103  25.506077 158.428600
+     */
+    val features = Vectors.dense(2.233396950271428, -2.5321374085997683)
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val responsePredictR = 44.54465
+    val quantilePredictR = Vectors.dense(1.452103, 25.506077, 158.428600)
+
+    assert(model.predict(features) ~== responsePredictR relTol 1E-3)
+    model.setQuantileProbabilities(quantileProbabilities)
+    assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
+
+    model.transform(datasetMultivariate).select("features", "prediction").collect().foreach {
+      case Row(features: DenseVector, prediction1: Double) =>
+        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
+        assert(prediction1 ~== prediction2 relTol 1E-5)
+    }
+  }
+}

From d009da2f5c803f3b7344c96abbfcf3ecef2f5ad2 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 17 Sep 2015 22:05:20 -0700
Subject: [PATCH 022/896] [SPARK-10682] [GRAPHX] Remove Bagel test suites.

Bagel has been deprecated and we haven't done any changes to it. There is no need to run those tests.

This should speed up tests by 1 min.

Author: Reynold Xin <rxin@databricks.com>

Closes #8807 from rxin/SPARK-10682.
---
 bagel/src/test/resources/log4j.properties     |  27 -----
 .../org/apache/spark/bagel/BagelSuite.scala   | 113 ------------------
 2 files changed, 140 deletions(-)
 delete mode 100644 bagel/src/test/resources/log4j.properties
 delete mode 100644 bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala

diff --git a/bagel/src/test/resources/log4j.properties b/bagel/src/test/resources/log4j.properties
deleted file mode 100644
index edbecdae9209..000000000000
--- a/bagel/src/test/resources/log4j.properties
+++ /dev/null
@@ -1,27 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Set everything to be logged to the file target/unit-tests.log
-log4j.rootCategory=INFO, file
-log4j.appender.file=org.apache.log4j.FileAppender
-log4j.appender.file.append=true
-log4j.appender.file.file=target/unit-tests.log
-log4j.appender.file.layout=org.apache.log4j.PatternLayout
-log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss.SSS} %t %p %c{1}: %m%n
-
-# Ignore messages below warning level from Jetty, because it's a bit verbose
-log4j.logger.org.spark-project.jetty=WARN
diff --git a/bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala b/bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala
deleted file mode 100644
index fb10d734ac74..000000000000
--- a/bagel/src/test/scala/org/apache/spark/bagel/BagelSuite.scala
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.bagel
-
-import org.scalatest.{BeforeAndAfter, Assertions}
-import org.scalatest.concurrent.Timeouts
-import org.scalatest.time.SpanSugar._
-
-import org.apache.spark._
-import org.apache.spark.storage.StorageLevel
-
-class TestVertex(val active: Boolean, val age: Int) extends Vertex with Serializable
-class TestMessage(val targetId: String) extends Message[String] with Serializable
-
-class BagelSuite extends SparkFunSuite with Assertions with BeforeAndAfter with Timeouts {
-
-  var sc: SparkContext = _
-
-  after {
-    if (sc != null) {
-      sc.stop()
-      sc = null
-    }
-  }
-
-  test("halting by voting") {
-    sc = new SparkContext("local", "test")
-    val verts = sc.parallelize(Array("a", "b", "c", "d").map(id => (id, new TestVertex(true, 0))))
-    val msgs = sc.parallelize(Array[(String, TestMessage)]())
-    val numSupersteps = 5
-    val result =
-      Bagel.run(sc, verts, msgs, sc.defaultParallelism) {
-        (self: TestVertex, msgs: Option[Array[TestMessage]], superstep: Int) =>
-          (new TestVertex(superstep < numSupersteps - 1, self.age + 1), Array[TestMessage]())
-      }
-    for ((id, vert) <- result.collect) {
-      assert(vert.age === numSupersteps)
-    }
-  }
-
-  test("halting by message silence") {
-    sc = new SparkContext("local", "test")
-    val verts = sc.parallelize(Array("a", "b", "c", "d").map(id => (id, new TestVertex(false, 0))))
-    val msgs = sc.parallelize(Array("a" -> new TestMessage("a")))
-    val numSupersteps = 5
-    val result =
-      Bagel.run(sc, verts, msgs, sc.defaultParallelism) {
-        (self: TestVertex, msgs: Option[Array[TestMessage]], superstep: Int) =>
-          val msgsOut =
-            msgs match {
-              case Some(ms) if (superstep < numSupersteps - 1) =>
-                ms
-              case _ =>
-                Array[TestMessage]()
-            }
-        (new TestVertex(self.active, self.age + 1), msgsOut)
-      }
-    for ((id, vert) <- result.collect) {
-      assert(vert.age === numSupersteps)
-    }
-  }
-
-  test("large number of iterations") {
-    // This tests whether jobs with a large number of iterations finish in a reasonable time,
-    // because non-memoized recursion in RDD or DAGScheduler used to cause them to hang
-    failAfter(30 seconds) {
-      sc = new SparkContext("local", "test")
-      val verts = sc.parallelize((1 to 4).map(id => (id.toString, new TestVertex(true, 0))))
-      val msgs = sc.parallelize(Array[(String, TestMessage)]())
-      val numSupersteps = 50
-      val result =
-        Bagel.run(sc, verts, msgs, sc.defaultParallelism) {
-          (self: TestVertex, msgs: Option[Array[TestMessage]], superstep: Int) =>
-            (new TestVertex(superstep < numSupersteps - 1, self.age + 1), Array[TestMessage]())
-        }
-      for ((id, vert) <- result.collect) {
-        assert(vert.age === numSupersteps)
-      }
-    }
-  }
-
-  test("using non-default persistence level") {
-    failAfter(10 seconds) {
-      sc = new SparkContext("local", "test")
-      val verts = sc.parallelize((1 to 4).map(id => (id.toString, new TestVertex(true, 0))))
-      val msgs = sc.parallelize(Array[(String, TestMessage)]())
-      val numSupersteps = 20
-      val result =
-        Bagel.run(sc, verts, msgs, sc.defaultParallelism, StorageLevel.DISK_ONLY) {
-          (self: TestVertex, msgs: Option[Array[TestMessage]], superstep: Int) =>
-            (new TestVertex(superstep < numSupersteps - 1, self.age + 1), Array[TestMessage]())
-        }
-      for ((id, vert) <- result.collect) {
-        assert(vert.age === numSupersteps)
-      }
-    }
-  }
-}

From 93c7650ab60a839a9cbe8b4ea1d5eda93e53ebe0 Mon Sep 17 00:00:00 2001
From: linweizhong <linweizhong@huawei.com>
Date: Thu, 17 Sep 2015 22:25:24 -0700
Subject: [PATCH 023/896] [SPARK-9522] [SQL] SparkSubmit process can not exit
 if kill application when HiveThriftServer was starting

When we start HiveThriftServer, we will start SparkContext first, then start HiveServer2, if we kill application while HiveServer2 is starting then SparkContext will stop successfully, but SparkSubmit process can not exit.

Author: linweizhong <linweizhong@huawei.com>

Closes #7853 from Sephiroth-Lin/SPARK-9522.
---
 core/src/main/scala/org/apache/spark/SparkContext.scala     | 2 +-
 .../spark/sql/hive/thriftserver/HiveThriftServer2.scala     | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 9c3218719f7f..ebd8e946ee7a 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -97,7 +97,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
 
   val startTime = System.currentTimeMillis()
 
-  private val stopped: AtomicBoolean = new AtomicBoolean(false)
+  private[spark] val stopped: AtomicBoolean = new AtomicBoolean(false)
 
   private def assertNotStopped(): Unit = {
     if (stopped.get()) {
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
index dd9fef9206d0..a0643cec0fb7 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
@@ -93,6 +93,12 @@ object HiveThriftServer2 extends Logging {
       } else {
         None
       }
+      // If application was killed before HiveThriftServer2 start successfully then SparkSubmit
+      // process can not exit, so check whether if SparkContext was stopped.
+      if (SparkSQLEnv.sparkContext.stopped.get()) {
+        logError("SparkContext has stopped even if HiveServer2 has started, so exit")
+        System.exit(-1)
+      }
     } catch {
       case e: Exception =>
         logError("Error starting HiveThriftServer2", e)

From 9a56dcdf7f19c9f7f913a2ce9bc981cb43a113c5 Mon Sep 17 00:00:00 2001
From: Felix Bechstein <felix.bechstein@otto.de>
Date: Thu, 17 Sep 2015 22:42:46 -0700
Subject: [PATCH 024/896] docs/running-on-mesos.md: state default values in
 default column

This PR simply uses the default value column for defaults.

Author: Felix Bechstein <felix.bechstein@otto.de>

Closes #8810 from felixb/fix_mesos_doc.
---
 docs/running-on-mesos.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index 247e6ecfbdb8..1814fb32ed8a 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -332,21 +332,21 @@ See the [configuration page](configuration.html) for information on Spark config
 </tr>
 <tr>
   <td><code>spark.mesos.principal</code></td>
-  <td>Framework principal to authenticate to Mesos</td>
+  <td>(none)</td>
   <td>
     Set the principal with which Spark framework will use to authenticate with Mesos.
   </td>
 </tr>
 <tr>
   <td><code>spark.mesos.secret</code></td>
-  <td>Framework secret to authenticate to Mesos</td>
+  <td>(none)/td>
   <td>
     Set the secret with which Spark framework will use to authenticate with Mesos.
   </td>
 </tr>
 <tr>
   <td><code>spark.mesos.role</code></td>
-  <td>Role for the Spark framework</td>
+  <td>*</td>
   <td>
     Set the role of this Spark framework for Mesos. Roles are used in Mesos for reservations
     and resource weight sharing.
@@ -354,7 +354,7 @@ See the [configuration page](configuration.html) for information on Spark config
 </tr>
 <tr>
   <td><code>spark.mesos.constraints</code></td>
-  <td>Attribute based constraints to be matched against when accepting resource offers.</td>
+  <td>(none)</td>
   <td>
     Attribute based constraints on mesos resource offers. By default, all resource offers will be accepted. Refer to <a href="http://mesos.apache.org/documentation/attributes-resources/">Mesos Attributes & Resources</a> for more information on attributes.
     <ul>

From 74d8f7dda82c3a16348f3ff22da83203e0b7f708 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 17 Sep 2015 22:46:13 -0700
Subject: [PATCH 025/896] Added <code> tag to documentation.

---
 docs/running-on-mesos.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index 1814fb32ed8a..330c159c67bc 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -346,7 +346,7 @@ See the [configuration page](configuration.html) for information on Spark config
 </tr>
 <tr>
   <td><code>spark.mesos.role</code></td>
-  <td>*</td>
+  <td><code>*</code></td>
   <td>
     Set the role of this Spark framework for Mesos. Roles are used in Mesos for reservations
     and resource weight sharing.

From e3b5d6cb29e0f983fcc55920619e6433298955f5 Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Fri, 18 Sep 2015 00:43:02 -0700
Subject: [PATCH 026/896] [SPARK-10684] [SQL] StructType.interpretedOrdering
 need not to be serialized

Kryo fails with buffer overflow even with max value (2G).

{noformat}
org.apache.spark.SparkException: Kryo serialization failed: Buffer overflow. Available: 0, required: 1
Serialization trace:
containsChild (org.apache.spark.sql.catalyst.expressions.BoundReference)
child (org.apache.spark.sql.catalyst.expressions.SortOrder)
array (scala.collection.mutable.ArraySeq)
ordering (org.apache.spark.sql.catalyst.expressions.InterpretedOrdering)
interpretedOrdering (org.apache.spark.sql.types.StructType)
schema (org.apache.spark.sql.catalyst.expressions.GenericRowWithSchema). To avoid this, increase spark.kryoserializer.buffer.max value.
        at org.apache.spark.serializer.KryoSerializerInstance.serialize(KryoSerializer.scala:263)
        at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:240)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
{noformat}

Author: navis.ryu <navis@apache.org>

Closes #8808 from navis/SPARK-10684.
---
 .../main/scala/org/apache/spark/sql/types/StructType.scala    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
index d8968ef80639..b29cf22dcb58 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
@@ -305,7 +305,9 @@ case class StructType(fields: Array[StructField]) extends DataType with Seq[Stru
     f(this) || fields.exists(field => field.dataType.existsRecursively(f))
   }
 
-  private[sql] val interpretedOrdering = InterpretedOrdering.forSchema(this.fields.map(_.dataType))
+  @transient
+  private[sql] lazy val interpretedOrdering =
+    InterpretedOrdering.forSchema(this.fields.map(_.dataType))
 }
 
 object StructType extends AbstractDataType {

From 20fd35dfd1ac402b622604e7bbedcc53a580b0a2 Mon Sep 17 00:00:00 2001
From: Yash Datta <Yash.Datta@guavus.com>
Date: Fri, 18 Sep 2015 08:22:38 -0700
Subject: [PATCH 027/896] [SPARK-10451] [SQL] Prevent unnecessary
 serializations in InMemoryColumnarTableScan

Many of the fields in InMemoryColumnar scan and InMemoryRelation can be made transient.

This  reduces my 1000ms job to abt 700 ms . The task size reduces from 2.8 mb to ~1300kb

Author: Yash Datta <Yash.Datta@guavus.com>

Closes #8604 from saucam/serde.
---
 .../columnar/InMemoryColumnarTableScan.scala  | 35 +++++++++++--------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index 66d429bc0619..d7e145f9c2bb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -48,10 +48,10 @@ private[sql] case class InMemoryRelation(
     useCompression: Boolean,
     batchSize: Int,
     storageLevel: StorageLevel,
-    child: SparkPlan,
+    @transient child: SparkPlan,
     tableName: Option[String])(
-    private var _cachedColumnBuffers: RDD[CachedBatch] = null,
-    private var _statistics: Statistics = null,
+    @transient private var _cachedColumnBuffers: RDD[CachedBatch] = null,
+    @transient private var _statistics: Statistics = null,
     private var _batchStats: Accumulable[ArrayBuffer[InternalRow], InternalRow] = null)
   extends LogicalPlan with MultiInstanceRelation {
 
@@ -62,7 +62,7 @@ private[sql] case class InMemoryRelation(
       _batchStats
     }
 
-  val partitionStatistics = new PartitionStatistics(output)
+  @transient val partitionStatistics = new PartitionStatistics(output)
 
   private def computeSizeInBytes = {
     val sizeOfRow: Expression =
@@ -196,7 +196,7 @@ private[sql] case class InMemoryRelation(
 private[sql] case class InMemoryColumnarTableScan(
     attributes: Seq[Attribute],
     predicates: Seq[Expression],
-    relation: InMemoryRelation)
+    @transient relation: InMemoryRelation)
   extends LeafNode {
 
   override def output: Seq[Attribute] = attributes
@@ -205,7 +205,7 @@ private[sql] case class InMemoryColumnarTableScan(
 
   // Returned filter predicate should return false iff it is impossible for the input expression
   // to evaluate to `true' based on statistics collected about this partition batch.
-  val buildFilter: PartialFunction[Expression, Expression] = {
+  @transient val buildFilter: PartialFunction[Expression, Expression] = {
     case And(lhs: Expression, rhs: Expression)
       if buildFilter.isDefinedAt(lhs) || buildFilter.isDefinedAt(rhs) =>
       (buildFilter.lift(lhs) ++ buildFilter.lift(rhs)).reduce(_ && _)
@@ -268,16 +268,23 @@ private[sql] case class InMemoryColumnarTableScan(
       readBatches.setValue(0)
     }
 
-    relation.cachedColumnBuffers.mapPartitions { cachedBatchIterator =>
-      val partitionFilter = newPredicate(
-        partitionFilters.reduceOption(And).getOrElse(Literal(true)),
-        relation.partitionStatistics.schema)
+    // Using these variables here to avoid serialization of entire objects (if referenced directly)
+    // within the map Partitions closure.
+    val schema = relation.partitionStatistics.schema
+    val schemaIndex = schema.zipWithIndex
+    val relOutput = relation.output
+    val buffers = relation.cachedColumnBuffers
+
+    buffers.mapPartitions { cachedBatchIterator =>
+    val partitionFilter = newPredicate(
+      partitionFilters.reduceOption(And).getOrElse(Literal(true)),
+      schema)
 
       // Find the ordinals and data types of the requested columns.  If none are requested, use the
       // narrowest (the field with minimum default element size).
       val (requestedColumnIndices, requestedColumnDataTypes) = if (attributes.isEmpty) {
         val (narrowestOrdinal, narrowestDataType) =
-          relation.output.zipWithIndex.map { case (a, ordinal) =>
+          relOutput.zipWithIndex.map { case (a, ordinal) =>
             ordinal -> a.dataType
           } minBy { case (_, dataType) =>
             ColumnType(dataType).defaultSize
@@ -285,7 +292,7 @@ private[sql] case class InMemoryColumnarTableScan(
         Seq(narrowestOrdinal) -> Seq(narrowestDataType)
       } else {
         attributes.map { a =>
-          relation.output.indexWhere(_.exprId == a.exprId) -> a.dataType
+          relOutput.indexWhere(_.exprId == a.exprId) -> a.dataType
         }.unzip
       }
 
@@ -296,7 +303,7 @@ private[sql] case class InMemoryColumnarTableScan(
           // Build column accessors
           val columnAccessors = requestedColumnIndices.map { batchColumnIndex =>
             ColumnAccessor(
-              relation.output(batchColumnIndex).dataType,
+              relOutput(batchColumnIndex).dataType,
               ByteBuffer.wrap(cachedBatch.buffers(batchColumnIndex)))
           }
 
@@ -328,7 +335,7 @@ private[sql] case class InMemoryColumnarTableScan(
         if (inMemoryPartitionPruningEnabled) {
           cachedBatchIterator.filter { cachedBatch =>
             if (!partitionFilter(cachedBatch.stats)) {
-              def statsString: String = relation.partitionStatistics.schema.zipWithIndex.map {
+              def statsString: String = schemaIndex.map {
                 case (a, i) =>
                   val value = cachedBatch.stats.get(i, a.dataType)
                   s"${a.name}: $value"

From 35e8ab939000d4a1a01c1af4015c25ff6f4013a3 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Fri, 18 Sep 2015 09:53:52 -0700
Subject: [PATCH 028/896] [SPARK-10615] [PYSPARK] change assertEquals to
 assertEqual

As ```assertEquals``` is deprecated, so we need to change ```assertEquals``` to ```assertEqual``` for existing python unit tests.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8814 from yanboliang/spark-10615.
---
 python/pyspark/ml/tests.py        |  16 +--
 python/pyspark/mllib/tests.py     | 162 +++++++++++++++---------------
 python/pyspark/sql/tests.py       |  18 ++--
 python/pyspark/streaming/tests.py |   2 +-
 4 files changed, 99 insertions(+), 99 deletions(-)

diff --git a/python/pyspark/ml/tests.py b/python/pyspark/ml/tests.py
index b892318f50bd..648fa8858fba 100644
--- a/python/pyspark/ml/tests.py
+++ b/python/pyspark/ml/tests.py
@@ -182,7 +182,7 @@ def test_params(self):
         self.assertEqual(testParams.getMaxIter(), 10)
         testParams.setMaxIter(100)
         self.assertTrue(testParams.isSet(maxIter))
-        self.assertEquals(testParams.getMaxIter(), 100)
+        self.assertEqual(testParams.getMaxIter(), 100)
 
         self.assertTrue(testParams.hasParam(inputCol))
         self.assertFalse(testParams.hasDefault(inputCol))
@@ -195,7 +195,7 @@ def test_params(self):
         testParams._setDefault(seed=41)
         testParams.setSeed(43)
 
-        self.assertEquals(
+        self.assertEqual(
             testParams.explainParams(),
             "\n".join(["inputCol: input column name (undefined)",
                        "maxIter: max number of iterations (>= 0) (default: 10, current: 100)",
@@ -264,23 +264,23 @@ def test_ngram(self):
         self.assertEqual(ngram0.getInputCol(), "input")
         self.assertEqual(ngram0.getOutputCol(), "output")
         transformedDF = ngram0.transform(dataset)
-        self.assertEquals(transformedDF.head().output, ["a b c d", "b c d e"])
+        self.assertEqual(transformedDF.head().output, ["a b c d", "b c d e"])
 
     def test_stopwordsremover(self):
         sqlContext = SQLContext(self.sc)
         dataset = sqlContext.createDataFrame([Row(input=["a", "panda"])])
         stopWordRemover = StopWordsRemover(inputCol="input", outputCol="output")
         # Default
-        self.assertEquals(stopWordRemover.getInputCol(), "input")
+        self.assertEqual(stopWordRemover.getInputCol(), "input")
         transformedDF = stopWordRemover.transform(dataset)
-        self.assertEquals(transformedDF.head().output, ["panda"])
+        self.assertEqual(transformedDF.head().output, ["panda"])
         # Custom
         stopwords = ["panda"]
         stopWordRemover.setStopWords(stopwords)
-        self.assertEquals(stopWordRemover.getInputCol(), "input")
-        self.assertEquals(stopWordRemover.getStopWords(), stopwords)
+        self.assertEqual(stopWordRemover.getInputCol(), "input")
+        self.assertEqual(stopWordRemover.getStopWords(), stopwords)
         transformedDF = stopWordRemover.transform(dataset)
-        self.assertEquals(transformedDF.head().output, ["a"])
+        self.assertEqual(transformedDF.head().output, ["a"])
 
 
 class HasInducedError(Params):
diff --git a/python/pyspark/mllib/tests.py b/python/pyspark/mllib/tests.py
index 636f9a06cab7..96cf13495aa9 100644
--- a/python/pyspark/mllib/tests.py
+++ b/python/pyspark/mllib/tests.py
@@ -166,13 +166,13 @@ def test_dot(self):
                      [1., 2., 3., 4.],
                      [1., 2., 3., 4.]])
         arr = pyarray.array('d', [0, 1, 2, 3])
-        self.assertEquals(10.0, sv.dot(dv))
+        self.assertEqual(10.0, sv.dot(dv))
         self.assertTrue(array_equal(array([3., 6., 9., 12.]), sv.dot(mat)))
-        self.assertEquals(30.0, dv.dot(dv))
+        self.assertEqual(30.0, dv.dot(dv))
         self.assertTrue(array_equal(array([10., 20., 30., 40.]), dv.dot(mat)))
-        self.assertEquals(30.0, lst.dot(dv))
+        self.assertEqual(30.0, lst.dot(dv))
         self.assertTrue(array_equal(array([10., 20., 30., 40.]), lst.dot(mat)))
-        self.assertEquals(7.0, sv.dot(arr))
+        self.assertEqual(7.0, sv.dot(arr))
 
     def test_squared_distance(self):
         sv = SparseVector(4, {1: 1, 3: 2})
@@ -181,27 +181,27 @@ def test_squared_distance(self):
         lst1 = [4, 3, 2, 1]
         arr = pyarray.array('d', [0, 2, 1, 3])
         narr = array([0, 2, 1, 3])
-        self.assertEquals(15.0, _squared_distance(sv, dv))
-        self.assertEquals(25.0, _squared_distance(sv, lst))
-        self.assertEquals(20.0, _squared_distance(dv, lst))
-        self.assertEquals(15.0, _squared_distance(dv, sv))
-        self.assertEquals(25.0, _squared_distance(lst, sv))
-        self.assertEquals(20.0, _squared_distance(lst, dv))
-        self.assertEquals(0.0, _squared_distance(sv, sv))
-        self.assertEquals(0.0, _squared_distance(dv, dv))
-        self.assertEquals(0.0, _squared_distance(lst, lst))
-        self.assertEquals(25.0, _squared_distance(sv, lst1))
-        self.assertEquals(3.0, _squared_distance(sv, arr))
-        self.assertEquals(3.0, _squared_distance(sv, narr))
+        self.assertEqual(15.0, _squared_distance(sv, dv))
+        self.assertEqual(25.0, _squared_distance(sv, lst))
+        self.assertEqual(20.0, _squared_distance(dv, lst))
+        self.assertEqual(15.0, _squared_distance(dv, sv))
+        self.assertEqual(25.0, _squared_distance(lst, sv))
+        self.assertEqual(20.0, _squared_distance(lst, dv))
+        self.assertEqual(0.0, _squared_distance(sv, sv))
+        self.assertEqual(0.0, _squared_distance(dv, dv))
+        self.assertEqual(0.0, _squared_distance(lst, lst))
+        self.assertEqual(25.0, _squared_distance(sv, lst1))
+        self.assertEqual(3.0, _squared_distance(sv, arr))
+        self.assertEqual(3.0, _squared_distance(sv, narr))
 
     def test_hash(self):
         v1 = DenseVector([0.0, 1.0, 0.0, 5.5])
         v2 = SparseVector(4, [(1, 1.0), (3, 5.5)])
         v3 = DenseVector([0.0, 1.0, 0.0, 5.5])
         v4 = SparseVector(4, [(1, 1.0), (3, 2.5)])
-        self.assertEquals(hash(v1), hash(v2))
-        self.assertEquals(hash(v1), hash(v3))
-        self.assertEquals(hash(v2), hash(v3))
+        self.assertEqual(hash(v1), hash(v2))
+        self.assertEqual(hash(v1), hash(v3))
+        self.assertEqual(hash(v2), hash(v3))
         self.assertFalse(hash(v1) == hash(v4))
         self.assertFalse(hash(v2) == hash(v4))
 
@@ -212,8 +212,8 @@ def test_eq(self):
         v4 = SparseVector(6, [(1, 1.0), (3, 5.5)])
         v5 = DenseVector([0.0, 1.0, 0.0, 2.5])
         v6 = SparseVector(4, [(1, 1.0), (3, 2.5)])
-        self.assertEquals(v1, v2)
-        self.assertEquals(v1, v3)
+        self.assertEqual(v1, v2)
+        self.assertEqual(v1, v3)
         self.assertFalse(v2 == v4)
         self.assertFalse(v1 == v5)
         self.assertFalse(v1 == v6)
@@ -238,13 +238,13 @@ def test_conversion(self):
 
     def test_sparse_vector_indexing(self):
         sv = SparseVector(4, {1: 1, 3: 2})
-        self.assertEquals(sv[0], 0.)
-        self.assertEquals(sv[3], 2.)
-        self.assertEquals(sv[1], 1.)
-        self.assertEquals(sv[2], 0.)
-        self.assertEquals(sv[-1], 2)
-        self.assertEquals(sv[-2], 0)
-        self.assertEquals(sv[-4], 0)
+        self.assertEqual(sv[0], 0.)
+        self.assertEqual(sv[3], 2.)
+        self.assertEqual(sv[1], 1.)
+        self.assertEqual(sv[2], 0.)
+        self.assertEqual(sv[-1], 2)
+        self.assertEqual(sv[-2], 0)
+        self.assertEqual(sv[-4], 0)
         for ind in [4, -5]:
             self.assertRaises(ValueError, sv.__getitem__, ind)
         for ind in [7.8, '1']:
@@ -255,7 +255,7 @@ def test_matrix_indexing(self):
         expected = [[0, 6], [1, 8], [4, 10]]
         for i in range(3):
             for j in range(2):
-                self.assertEquals(mat[i, j], expected[i][j])
+                self.assertEqual(mat[i, j], expected[i][j])
 
     def test_repr_dense_matrix(self):
         mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10])
@@ -308,11 +308,11 @@ def test_sparse_matrix(self):
         # Test sparse matrix creation.
         sm1 = SparseMatrix(
             3, 4, [0, 2, 2, 4, 4], [1, 2, 1, 2], [1.0, 2.0, 4.0, 5.0])
-        self.assertEquals(sm1.numRows, 3)
-        self.assertEquals(sm1.numCols, 4)
-        self.assertEquals(sm1.colPtrs.tolist(), [0, 2, 2, 4, 4])
-        self.assertEquals(sm1.rowIndices.tolist(), [1, 2, 1, 2])
-        self.assertEquals(sm1.values.tolist(), [1.0, 2.0, 4.0, 5.0])
+        self.assertEqual(sm1.numRows, 3)
+        self.assertEqual(sm1.numCols, 4)
+        self.assertEqual(sm1.colPtrs.tolist(), [0, 2, 2, 4, 4])
+        self.assertEqual(sm1.rowIndices.tolist(), [1, 2, 1, 2])
+        self.assertEqual(sm1.values.tolist(), [1.0, 2.0, 4.0, 5.0])
         self.assertTrue(
             repr(sm1),
             'SparseMatrix(3, 4, [0, 2, 2, 4, 4], [1, 2, 1, 2], [1.0, 2.0, 4.0, 5.0], False)')
@@ -325,13 +325,13 @@ def test_sparse_matrix(self):
 
         for i in range(3):
             for j in range(4):
-                self.assertEquals(expected[i][j], sm1[i, j])
+                self.assertEqual(expected[i][j], sm1[i, j])
         self.assertTrue(array_equal(sm1.toArray(), expected))
 
         # Test conversion to dense and sparse.
         smnew = sm1.toDense().toSparse()
-        self.assertEquals(sm1.numRows, smnew.numRows)
-        self.assertEquals(sm1.numCols, smnew.numCols)
+        self.assertEqual(sm1.numRows, smnew.numRows)
+        self.assertEqual(sm1.numCols, smnew.numCols)
         self.assertTrue(array_equal(sm1.colPtrs, smnew.colPtrs))
         self.assertTrue(array_equal(sm1.rowIndices, smnew.rowIndices))
         self.assertTrue(array_equal(sm1.values, smnew.values))
@@ -339,11 +339,11 @@ def test_sparse_matrix(self):
         sm1t = SparseMatrix(
             3, 4, [0, 2, 3, 5], [0, 1, 2, 0, 2], [3.0, 2.0, 4.0, 9.0, 8.0],
             isTransposed=True)
-        self.assertEquals(sm1t.numRows, 3)
-        self.assertEquals(sm1t.numCols, 4)
-        self.assertEquals(sm1t.colPtrs.tolist(), [0, 2, 3, 5])
-        self.assertEquals(sm1t.rowIndices.tolist(), [0, 1, 2, 0, 2])
-        self.assertEquals(sm1t.values.tolist(), [3.0, 2.0, 4.0, 9.0, 8.0])
+        self.assertEqual(sm1t.numRows, 3)
+        self.assertEqual(sm1t.numCols, 4)
+        self.assertEqual(sm1t.colPtrs.tolist(), [0, 2, 3, 5])
+        self.assertEqual(sm1t.rowIndices.tolist(), [0, 1, 2, 0, 2])
+        self.assertEqual(sm1t.values.tolist(), [3.0, 2.0, 4.0, 9.0, 8.0])
 
         expected = [
             [3, 2, 0, 0],
@@ -352,18 +352,18 @@ def test_sparse_matrix(self):
 
         for i in range(3):
             for j in range(4):
-                self.assertEquals(expected[i][j], sm1t[i, j])
+                self.assertEqual(expected[i][j], sm1t[i, j])
         self.assertTrue(array_equal(sm1t.toArray(), expected))
 
     def test_dense_matrix_is_transposed(self):
         mat1 = DenseMatrix(3, 2, [0, 4, 1, 6, 3, 9], isTransposed=True)
         mat = DenseMatrix(3, 2, [0, 1, 3, 4, 6, 9])
-        self.assertEquals(mat1, mat)
+        self.assertEqual(mat1, mat)
 
         expected = [[0, 4], [1, 6], [3, 9]]
         for i in range(3):
             for j in range(2):
-                self.assertEquals(mat1[i, j], expected[i][j])
+                self.assertEqual(mat1[i, j], expected[i][j])
         self.assertTrue(array_equal(mat1.toArray(), expected))
 
         sm = mat1.toSparse()
@@ -412,8 +412,8 @@ def test_kmeans(self):
         ]
         clusters = KMeans.train(self.sc.parallelize(data), 2, initializationMode="k-means||",
                                 initializationSteps=7, epsilon=1e-4)
-        self.assertEquals(clusters.predict(data[0]), clusters.predict(data[1]))
-        self.assertEquals(clusters.predict(data[2]), clusters.predict(data[3]))
+        self.assertEqual(clusters.predict(data[0]), clusters.predict(data[1]))
+        self.assertEqual(clusters.predict(data[2]), clusters.predict(data[3]))
 
     def test_kmeans_deterministic(self):
         from pyspark.mllib.clustering import KMeans
@@ -443,8 +443,8 @@ def test_gmm(self):
         clusters = GaussianMixture.train(data, 2, convergenceTol=0.001,
                                          maxIterations=10, seed=56)
         labels = clusters.predict(data).collect()
-        self.assertEquals(labels[0], labels[1])
-        self.assertEquals(labels[2], labels[3])
+        self.assertEqual(labels[0], labels[1])
+        self.assertEqual(labels[2], labels[3])
 
     def test_gmm_deterministic(self):
         from pyspark.mllib.clustering import GaussianMixture
@@ -456,7 +456,7 @@ def test_gmm_deterministic(self):
         clusters2 = GaussianMixture.train(data, 5, convergenceTol=0.001,
                                           maxIterations=10, seed=63)
         for c1, c2 in zip(clusters1.weights, clusters2.weights):
-            self.assertEquals(round(c1, 7), round(c2, 7))
+            self.assertEqual(round(c1, 7), round(c2, 7))
 
     def test_classification(self):
         from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
@@ -711,18 +711,18 @@ def test_serialize(self):
         lil[1, 0] = 1
         lil[3, 0] = 2
         sv = SparseVector(4, {1: 1, 3: 2})
-        self.assertEquals(sv, _convert_to_vector(lil))
-        self.assertEquals(sv, _convert_to_vector(lil.tocsc()))
-        self.assertEquals(sv, _convert_to_vector(lil.tocoo()))
-        self.assertEquals(sv, _convert_to_vector(lil.tocsr()))
-        self.assertEquals(sv, _convert_to_vector(lil.todok()))
+        self.assertEqual(sv, _convert_to_vector(lil))
+        self.assertEqual(sv, _convert_to_vector(lil.tocsc()))
+        self.assertEqual(sv, _convert_to_vector(lil.tocoo()))
+        self.assertEqual(sv, _convert_to_vector(lil.tocsr()))
+        self.assertEqual(sv, _convert_to_vector(lil.todok()))
 
         def serialize(l):
             return ser.loads(ser.dumps(_convert_to_vector(l)))
-        self.assertEquals(sv, serialize(lil))
-        self.assertEquals(sv, serialize(lil.tocsc()))
-        self.assertEquals(sv, serialize(lil.tocsr()))
-        self.assertEquals(sv, serialize(lil.todok()))
+        self.assertEqual(sv, serialize(lil))
+        self.assertEqual(sv, serialize(lil.tocsc()))
+        self.assertEqual(sv, serialize(lil.tocsr()))
+        self.assertEqual(sv, serialize(lil.todok()))
 
     def test_dot(self):
         from scipy.sparse import lil_matrix
@@ -730,7 +730,7 @@ def test_dot(self):
         lil[1, 0] = 1
         lil[3, 0] = 2
         dv = DenseVector(array([1., 2., 3., 4.]))
-        self.assertEquals(10.0, dv.dot(lil))
+        self.assertEqual(10.0, dv.dot(lil))
 
     def test_squared_distance(self):
         from scipy.sparse import lil_matrix
@@ -739,8 +739,8 @@ def test_squared_distance(self):
         lil[3, 0] = 2
         dv = DenseVector(array([1., 2., 3., 4.]))
         sv = SparseVector(4, {0: 1, 1: 2, 2: 3, 3: 4})
-        self.assertEquals(15.0, dv.squared_distance(lil))
-        self.assertEquals(15.0, sv.squared_distance(lil))
+        self.assertEqual(15.0, dv.squared_distance(lil))
+        self.assertEqual(15.0, sv.squared_distance(lil))
 
     def scipy_matrix(self, size, values):
         """Create a column SciPy matrix from a dictionary of values"""
@@ -759,8 +759,8 @@ def test_clustering(self):
             self.scipy_matrix(3, {2: 1.1})
         ]
         clusters = KMeans.train(self.sc.parallelize(data), 2, initializationMode="k-means||")
-        self.assertEquals(clusters.predict(data[0]), clusters.predict(data[1]))
-        self.assertEquals(clusters.predict(data[2]), clusters.predict(data[3]))
+        self.assertEqual(clusters.predict(data[0]), clusters.predict(data[1]))
+        self.assertEqual(clusters.predict(data[2]), clusters.predict(data[3]))
 
     def test_classification(self):
         from pyspark.mllib.classification import LogisticRegressionWithSGD, SVMWithSGD, NaiveBayes
@@ -984,12 +984,12 @@ def test_word2vec_setters(self):
             .setNumIterations(10) \
             .setSeed(1024) \
             .setMinCount(3)
-        self.assertEquals(model.vectorSize, 2)
+        self.assertEqual(model.vectorSize, 2)
         self.assertTrue(model.learningRate < 0.02)
-        self.assertEquals(model.numPartitions, 2)
-        self.assertEquals(model.numIterations, 10)
-        self.assertEquals(model.seed, 1024)
-        self.assertEquals(model.minCount, 3)
+        self.assertEqual(model.numPartitions, 2)
+        self.assertEqual(model.numIterations, 10)
+        self.assertEqual(model.seed, 1024)
+        self.assertEqual(model.minCount, 3)
 
     def test_word2vec_get_vectors(self):
         data = [
@@ -1002,7 +1002,7 @@ def test_word2vec_get_vectors(self):
             ["a"]
         ]
         model = Word2Vec().fit(self.sc.parallelize(data))
-        self.assertEquals(len(model.getVectors()), 3)
+        self.assertEqual(len(model.getVectors()), 3)
 
 
 class StandardScalerTests(MLlibTestCase):
@@ -1044,8 +1044,8 @@ def test_model_params(self):
         """Test that the model params are set correctly"""
         stkm = StreamingKMeans()
         stkm.setK(5).setDecayFactor(0.0)
-        self.assertEquals(stkm._k, 5)
-        self.assertEquals(stkm._decayFactor, 0.0)
+        self.assertEqual(stkm._k, 5)
+        self.assertEqual(stkm._decayFactor, 0.0)
 
         # Model not set yet.
         self.assertIsNone(stkm.latestModel())
@@ -1053,9 +1053,9 @@ def test_model_params(self):
 
         stkm.setInitialCenters(
             centers=[[0.0, 0.0], [1.0, 1.0]], weights=[1.0, 1.0])
-        self.assertEquals(
+        self.assertEqual(
             stkm.latestModel().centers, [[0.0, 0.0], [1.0, 1.0]])
-        self.assertEquals(stkm.latestModel().clusterWeights, [1.0, 1.0])
+        self.assertEqual(stkm.latestModel().clusterWeights, [1.0, 1.0])
 
     def test_accuracy_for_single_center(self):
         """Test that parameters obtained are correct for a single center."""
@@ -1070,7 +1070,7 @@ def test_accuracy_for_single_center(self):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(stkm.latestModel().clusterWeights, [25.0])
+            self.assertEqual(stkm.latestModel().clusterWeights, [25.0])
             return True
         self._eventually(condition, catch_assertions=True)
 
@@ -1114,7 +1114,7 @@ def test_trainOn_model(self):
         def condition():
             finalModel = stkm.latestModel()
             self.assertTrue(all(finalModel.centers == array(initCenters)))
-            self.assertEquals(finalModel.clusterWeights, [5.0, 5.0, 5.0, 5.0])
+            self.assertEqual(finalModel.clusterWeights, [5.0, 5.0, 5.0, 5.0])
             return True
         self._eventually(condition, catch_assertions=True)
 
@@ -1141,7 +1141,7 @@ def update(rdd):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(result, [[0], [1], [2], [3]])
+            self.assertEqual(result, [[0], [1], [2], [3]])
             return True
 
         self._eventually(condition, catch_assertions=True)
@@ -1263,7 +1263,7 @@ def test_convergence(self):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(len(models), len(input_batches))
+            self.assertEqual(len(models), len(input_batches))
             return True
 
         # We want all batches to finish for this test.
@@ -1297,7 +1297,7 @@ def test_predictions(self):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(len(true_predicted), len(input_batches))
+            self.assertEqual(len(true_predicted), len(input_batches))
             return True
 
         self._eventually(condition, catch_assertions=True)
@@ -1400,7 +1400,7 @@ def test_parameter_convergence(self):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(len(model_weights), len(batches))
+            self.assertEqual(len(model_weights), len(batches))
             return True
 
         # We want all batches to finish for this test.
@@ -1433,7 +1433,7 @@ def test_prediction(self):
         self.ssc.start()
 
         def condition():
-            self.assertEquals(len(samples), len(batches))
+            self.assertEqual(len(samples), len(batches))
             return True
 
         # We want all batches to finish for this test.
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index f2172b7a27d8..3e680f1030a7 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -157,7 +157,7 @@ class DataTypeTests(unittest.TestCase):
     def test_data_type_eq(self):
         lt = LongType()
         lt2 = pickle.loads(pickle.dumps(LongType()))
-        self.assertEquals(lt, lt2)
+        self.assertEqual(lt, lt2)
 
     # regression test for SPARK-7978
     def test_decimal_type(self):
@@ -393,7 +393,7 @@ def test_infer_nested_schema(self):
                                    CustomRow(field1=2, field2="row2"),
                                    CustomRow(field1=3, field2="row3")])
         df = self.sqlCtx.inferSchema(rdd)
-        self.assertEquals(Row(field1=1, field2=u'row1'), df.first())
+        self.assertEqual(Row(field1=1, field2=u'row1'), df.first())
 
     def test_create_dataframe_from_objects(self):
         data = [MyObject(1, "1"), MyObject(2, "2")]
@@ -403,7 +403,7 @@ def test_create_dataframe_from_objects(self):
 
     def test_select_null_literal(self):
         df = self.sqlCtx.sql("select null as col")
-        self.assertEquals(Row(col=None), df.first())
+        self.assertEqual(Row(col=None), df.first())
 
     def test_apply_schema(self):
         from datetime import date, datetime
@@ -519,14 +519,14 @@ def test_apply_schema_with_udt(self):
                              StructField("point", ExamplePointUDT(), False)])
         df = self.sqlCtx.createDataFrame([row], schema)
         point = df.head().point
-        self.assertEquals(point, ExamplePoint(1.0, 2.0))
+        self.assertEqual(point, ExamplePoint(1.0, 2.0))
 
         row = (1.0, PythonOnlyPoint(1.0, 2.0))
         schema = StructType([StructField("label", DoubleType(), False),
                              StructField("point", PythonOnlyUDT(), False)])
         df = self.sqlCtx.createDataFrame([row], schema)
         point = df.head().point
-        self.assertEquals(point, PythonOnlyPoint(1.0, 2.0))
+        self.assertEqual(point, PythonOnlyPoint(1.0, 2.0))
 
     def test_udf_with_udt(self):
         from pyspark.sql.tests import ExamplePoint, ExamplePointUDT
@@ -554,14 +554,14 @@ def test_parquet_with_udt(self):
         df0.write.parquet(output_dir)
         df1 = self.sqlCtx.parquetFile(output_dir)
         point = df1.head().point
-        self.assertEquals(point, ExamplePoint(1.0, 2.0))
+        self.assertEqual(point, ExamplePoint(1.0, 2.0))
 
         row = Row(label=1.0, point=PythonOnlyPoint(1.0, 2.0))
         df0 = self.sqlCtx.createDataFrame([row])
         df0.write.parquet(output_dir, mode='overwrite')
         df1 = self.sqlCtx.parquetFile(output_dir)
         point = df1.head().point
-        self.assertEquals(point, PythonOnlyPoint(1.0, 2.0))
+        self.assertEqual(point, PythonOnlyPoint(1.0, 2.0))
 
     def test_column_operators(self):
         ci = self.df.key
@@ -826,8 +826,8 @@ def test_infer_long_type(self):
         output_dir = os.path.join(self.tempdir.name, "infer_long_type")
         df.saveAsParquetFile(output_dir)
         df1 = self.sqlCtx.parquetFile(output_dir)
-        self.assertEquals('a', df1.first().f1)
-        self.assertEquals(100000000000000, df1.first().f2)
+        self.assertEqual('a', df1.first().f1)
+        self.assertEqual(100000000000000, df1.first().f2)
 
         self.assertEqual(_infer_type(1), LongType())
         self.assertEqual(_infer_type(2**10), LongType())
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index cfea95b0dec7..e4e56fff3b3f 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -693,7 +693,7 @@ def check_output(n):
 
         # Verify that getActiveOrCreate() returns active context
         self.setupCalled = False
-        self.assertEquals(StreamingContext.getActiveOrCreate(self.cpd, setup), self.ssc)
+        self.assertEqual(StreamingContext.getActiveOrCreate(self.cpd, setup), self.ssc)
         self.assertFalse(self.setupCalled)
 
         # Verify that getActiveOrCreate() uses existing SparkContext

From 00a2911c5bea67a1a4796fb1d6fd5d0a8ee79001 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Fri, 18 Sep 2015 12:19:08 -0700
Subject: [PATCH 029/896] [SPARK-10540] Fixes flaky all-data-type test

This PR breaks the original test case into multiple ones (one test case for each data type). In this way, test failure output can be much more readable.

Within each test case, we build a table with two columns, one of them is for the data type to test, the other is an "index" column, which is used to sort the DataFrame and workaround [SPARK-10591] [1]

[1]: https://issues.apache.org/jira/browse/SPARK-10591

Author: Cheng Lian <lian@databricks.com>

Closes #8768 from liancheng/spark-10540/test-all-data-types.
---
 .../sql/sources/hadoopFsRelationSuites.scala  | 109 +++++++-----------
 1 file changed, 43 insertions(+), 66 deletions(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
index 8ffcef85668d..d7504936d90e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
@@ -100,80 +100,57 @@ abstract class HadoopFsRelationTest extends QueryTest with SQLTestUtils with Tes
     }
   }
 
-  ignore("test all data types") {
-    withTempPath { file =>
-      // Create the schema.
-      val struct =
-        StructType(
-          StructField("f1", FloatType, true) ::
-            StructField("f2", ArrayType(BooleanType), true) :: Nil)
-      // TODO: add CalendarIntervalType to here once we can save it out.
-      val dataTypes =
-        Seq(
-          StringType, BinaryType, NullType, BooleanType,
-          ByteType, ShortType, IntegerType, LongType,
-          FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
-          DateType, TimestampType,
-          ArrayType(IntegerType), MapType(StringType, LongType), struct,
-          new MyDenseVectorUDT())
-      val fields = dataTypes.zipWithIndex.map { case (dataType, index) =>
-        StructField(s"col$index", dataType, nullable = true)
-      }
-      val schema = StructType(fields)
-
-      // Generate data at the driver side. We need to materialize the data first and then
-      // create RDD.
-      val maybeDataGenerator =
-        RandomDataGenerator.forType(
-          dataType = schema,
+  private val supportedDataTypes = Seq(
+    StringType, BinaryType,
+    NullType, BooleanType,
+    ByteType, ShortType, IntegerType, LongType,
+    FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
+    DateType, TimestampType,
+    ArrayType(IntegerType),
+    MapType(StringType, LongType),
+    new StructType()
+      .add("f1", FloatType, nullable = true)
+      .add("f2", ArrayType(BooleanType, containsNull = true), nullable = true),
+    new MyDenseVectorUDT()
+  ).filter(supportsDataType)
+
+  for (dataType <- supportedDataTypes) {
+    test(s"test all data types - $dataType") {
+      withTempPath { file =>
+        val path = file.getCanonicalPath
+
+        val dataGenerator = RandomDataGenerator.forType(
+          dataType = dataType,
           nullable = true,
-          seed = Some(System.nanoTime()))
-      val dataGenerator =
-        maybeDataGenerator
-          .getOrElse(fail(s"Failed to create data generator for schema $schema"))
-      val data = (1 to 10).map { i =>
-        dataGenerator.apply() match {
-          case row: Row => row
-          case null => Row.fromSeq(Seq.fill(schema.length)(null))
-          case other =>
-            fail(s"Row or null is expected to be generated, " +
-              s"but a ${other.getClass.getCanonicalName} is generated.")
+          seed = Some(System.nanoTime())
+        ).getOrElse {
+          fail(s"Failed to create data generator for schema $dataType")
         }
-      }
 
-      // Create a DF for the schema with random data.
-      val rdd = sqlContext.sparkContext.parallelize(data, 10)
-      val df = sqlContext.createDataFrame(rdd, schema)
+        // Create a DF for the schema with random data. The index field is used to sort the
+        // DataFrame.  This is a workaround for SPARK-10591.
+        val schema = new StructType()
+          .add("index", IntegerType, nullable = false)
+          .add("col", dataType, nullable = true)
+        val rdd = sqlContext.sparkContext.parallelize((1 to 10).map(i => Row(i, dataGenerator())))
+        val df = sqlContext.createDataFrame(rdd, schema).orderBy("index").coalesce(1)
 
-      // All columns that have supported data types of this source.
-      val supportedColumns = schema.fields.collect {
-        case StructField(name, dataType, _, _) if supportsDataType(dataType) => name
-      }
-      val selectedColumns = util.Random.shuffle(supportedColumns.toSeq)
-
-      val dfToBeSaved = df.selectExpr(selectedColumns: _*)
-
-      // Save the data out.
-      dfToBeSaved
-        .write
-        .format(dataSourceName)
-        .option("dataSchema", dfToBeSaved.schema.json) // This option is just used by tests.
-        .save(file.getCanonicalPath)
+        df.write
+          .mode("overwrite")
+          .format(dataSourceName)
+          .option("dataSchema", df.schema.json)
+          .save(path)
 
-      val loadedDF =
-        sqlContext
+        val loadedDF = sqlContext
           .read
           .format(dataSourceName)
-          .schema(dfToBeSaved.schema)
-          .option("dataSchema", dfToBeSaved.schema.json) // This option is just used by tests.
-          .load(file.getCanonicalPath)
-          .selectExpr(selectedColumns: _*)
+          .option("dataSchema", df.schema.json)
+          .schema(df.schema)
+          .load(path)
+          .orderBy("index")
 
-      // Read the data back.
-      checkAnswer(
-        loadedDF,
-        dfToBeSaved
-      )
+        checkAnswer(loadedDF, df)
+      }
     }
   }
 

From c6f8135ee52202bd86adb090ab631e80330ea4df Mon Sep 17 00:00:00 2001
From: Yijie Shen <henry.yijieshen@gmail.com>
Date: Fri, 18 Sep 2015 13:20:13 -0700
Subject: [PATCH 030/896] [SPARK-10539] [SQL] Project should not be pushed down
 through Intersect or Except #8742

Intersect and Except are both set operators and they use the all the columns to compare equality between rows. When pushing their Project parent down, the relations they based on would change, therefore not an equivalent transformation.

JIRA: https://issues.apache.org/jira/browse/SPARK-10539

I added some comments based on the fix of https://github.com/apache/spark/pull/8742.

Author: Yijie Shen <henry.yijieshen@gmail.com>
Author: Yin Huai <yhuai@databricks.com>

Closes #8823 from yhuai/fix_set_optimization.
---
 .../sql/catalyst/optimizer/Optimizer.scala    | 37 ++++++++++---------
 .../optimizer/SetOperationPushDownSuite.scala | 23 ++++++------
 .../org/apache/spark/sql/DataFrameSuite.scala |  9 +++++
 3 files changed, 39 insertions(+), 30 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 648a65e7c0eb..324f40a051c3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -85,7 +85,22 @@ object SamplePushDown extends Rule[LogicalPlan] {
 }
 
 /**
- * Pushes operations to either side of a Union, Intersect or Except.
+ * Pushes certain operations to both sides of a Union, Intersect or Except operator.
+ * Operations that are safe to pushdown are listed as follows.
+ * Union:
+ * Right now, Union means UNION ALL, which does not de-duplicate rows. So, it is
+ * safe to pushdown Filters and Projections through it. Once we add UNION DISTINCT,
+ * we will not be able to pushdown Projections.
+ *
+ * Intersect:
+ * It is not safe to pushdown Projections through it because we need to get the
+ * intersect of rows by comparing the entire rows. It is fine to pushdown Filters
+ * because we will not have non-deterministic expressions.
+ *
+ * Except:
+ * It is not safe to pushdown Projections through it because we need to get the
+ * intersect of rows by comparing the entire rows. It is fine to pushdown Filters
+ * because we will not have non-deterministic expressions.
  */
 object SetOperationPushDown extends Rule[LogicalPlan] {
 
@@ -122,40 +137,26 @@ object SetOperationPushDown extends Rule[LogicalPlan] {
         Filter(condition, left),
         Filter(pushToRight(condition, rewrites), right))
 
-    // Push down projection into union
+    // Push down projection through UNION ALL
     case Project(projectList, u @ Union(left, right)) =>
       val rewrites = buildRewrites(u)
       Union(
         Project(projectList, left),
         Project(projectList.map(pushToRight(_, rewrites)), right))
 
-    // Push down filter into intersect
+    // Push down filter through INTERSECT
     case Filter(condition, i @ Intersect(left, right)) =>
       val rewrites = buildRewrites(i)
       Intersect(
         Filter(condition, left),
         Filter(pushToRight(condition, rewrites), right))
 
-    // Push down projection into intersect
-    case Project(projectList, i @ Intersect(left, right)) =>
-      val rewrites = buildRewrites(i)
-      Intersect(
-        Project(projectList, left),
-        Project(projectList.map(pushToRight(_, rewrites)), right))
-
-    // Push down filter into except
+    // Push down filter through EXCEPT
     case Filter(condition, e @ Except(left, right)) =>
       val rewrites = buildRewrites(e)
       Except(
         Filter(condition, left),
         Filter(pushToRight(condition, rewrites), right))
-
-    // Push down projection into except
-    case Project(projectList, e @ Except(left, right)) =>
-      val rewrites = buildRewrites(e)
-      Except(
-        Project(projectList, left),
-        Project(projectList.map(pushToRight(_, rewrites)), right))
   }
 }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
index 49c979bc7d72..3fca47a023dc 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
@@ -60,23 +60,22 @@ class SetOperationPushDownSuite extends PlanTest {
     comparePlans(exceptOptimized, exceptCorrectAnswer)
   }
 
-  test("union/intersect/except: project to each side") {
+  test("union: project to each side") {
     val unionQuery = testUnion.select('a)
+    val unionOptimized = Optimize.execute(unionQuery.analyze)
+    val unionCorrectAnswer =
+      Union(testRelation.select('a), testRelation2.select('d)).analyze
+    comparePlans(unionOptimized, unionCorrectAnswer)
+  }
+
+  test("SPARK-10539: Project should not be pushed down through Intersect or Except") {
     val intersectQuery = testIntersect.select('b, 'c)
     val exceptQuery = testExcept.select('a, 'b, 'c)
 
-    val unionOptimized = Optimize.execute(unionQuery.analyze)
     val intersectOptimized = Optimize.execute(intersectQuery.analyze)
     val exceptOptimized = Optimize.execute(exceptQuery.analyze)
 
-    val unionCorrectAnswer =
-      Union(testRelation.select('a), testRelation2.select('d)).analyze
-    val intersectCorrectAnswer =
-      Intersect(testRelation.select('b, 'c), testRelation2.select('e, 'f)).analyze
-    val exceptCorrectAnswer =
-      Except(testRelation.select('a, 'b, 'c), testRelation2.select('d, 'e, 'f)).analyze
-
-    comparePlans(unionOptimized, unionCorrectAnswer)
-    comparePlans(intersectOptimized, intersectCorrectAnswer)
-    comparePlans(exceptOptimized, exceptCorrectAnswer)  }
+    comparePlans(intersectOptimized, intersectQuery.analyze)
+    comparePlans(exceptOptimized, exceptQuery.analyze)
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index c167999af580..1370713975f2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -907,4 +907,13 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       assert(row.getDouble(1) - row.getDouble(3) === 0.0 +- 0.001)
     }
   }
+
+  test("SPARK-10539: Project should not be pushed down through Intersect or Except") {
+    val df1 = (1 to 100).map(Tuple1.apply).toDF("i")
+    val df2 = (1 to 30).map(Tuple1.apply).toDF("i")
+    val intersect = df1.intersect(df2)
+    val except = df1.except(df2)
+    assert(intersect.count() === 30)
+    assert(except.count() === 70)
+  }
 }

From 3a22b1004f527d54d399dd0225cd7f2f8ffad9c5 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Fri, 18 Sep 2015 13:47:14 -0700
Subject: [PATCH 031/896] [SPARK-10449] [SQL] Don't merge decimal types with
 incompatable precision or scales

From JIRA: Schema merging should only handle struct fields. But currently we also reconcile decimal precision and scale information.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8634 from holdenk/SPARK-10449-dont-merge-different-precision.
---
 .../org/apache/spark/sql/types/StructType.scala | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
index b29cf22dcb58..d6b436724b2a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
@@ -373,10 +373,19 @@ object StructType extends AbstractDataType {
         StructType(newFields)
 
       case (DecimalType.Fixed(leftPrecision, leftScale),
-      DecimalType.Fixed(rightPrecision, rightScale)) =>
-        DecimalType(
-          max(leftScale, rightScale) + max(leftPrecision - leftScale, rightPrecision - rightScale),
-          max(leftScale, rightScale))
+        DecimalType.Fixed(rightPrecision, rightScale)) =>
+        if ((leftPrecision == rightPrecision) && (leftScale == rightScale)) {
+          DecimalType(leftPrecision, leftScale)
+        } else if ((leftPrecision != rightPrecision) && (leftScale != rightScale)) {
+          throw new SparkException("Failed to merge Decimal Tpes with incompatible " +
+            s"precision $leftPrecision and $rightPrecision & scale $leftScale and $rightScale")
+        } else if (leftPrecision != rightPrecision) {
+          throw new SparkException("Failed to merge Decimal Tpes with incompatible " +
+            s"precision $leftPrecision and $rightPrecision")
+        } else {
+          throw new SparkException("Failed to merge Decimal Tpes with incompatible " +
+            s"scala $leftScale and $rightScale")
+        }
 
       case (leftUdt: UserDefinedType[_], rightUdt: UserDefinedType[_])
         if leftUdt.userClass == rightUdt.userClass => leftUdt

From 348d7c9a93dd00d3d1859342a8eb0aea2e77f597 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Fri, 18 Sep 2015 13:48:41 -0700
Subject: [PATCH 032/896] [SPARK-9808] Remove hash shuffle file consolidation.

Author: Reynold Xin <rxin@databricks.com>

Closes #8812 from rxin/SPARK-9808-1.
---
 .../shuffle/FileShuffleBlockResolver.scala    | 178 ++----------------
 .../apache/spark/storage/BlockManager.scala   |   9 -
 .../org/apache/spark/storage/DiskStore.scala  |   3 -
 .../hash/HashShuffleManagerSuite.scala        | 110 -----------
 docs/configuration.md                         |  10 -
 .../shuffle/ExternalShuffleBlockResolver.java |   4 -
 project/MimaExcludes.scala                    |   4 +
 7 files changed, 17 insertions(+), 301 deletions(-)
 delete mode 100644 core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleManagerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
index c057de9b3f4d..d9902f96dfd4 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
@@ -17,9 +17,7 @@
 
 package org.apache.spark.shuffle
 
-import java.io.File
 import java.util.concurrent.ConcurrentLinkedQueue
-import java.util.concurrent.atomic.AtomicInteger
 
 import scala.collection.JavaConverters._
 
@@ -28,10 +26,8 @@ import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
 import org.apache.spark.network.netty.SparkTransportConf
 import org.apache.spark.serializer.Serializer
-import org.apache.spark.shuffle.FileShuffleBlockResolver.ShuffleFileGroup
 import org.apache.spark.storage._
 import org.apache.spark.util.{MetadataCleaner, MetadataCleanerType, TimeStampedHashMap}
-import org.apache.spark.util.collection.{PrimitiveKeyOpenHashMap, PrimitiveVector}
 
 /** A group of writers for a ShuffleMapTask, one writer per reducer. */
 private[spark] trait ShuffleWriterGroup {
@@ -43,24 +39,7 @@ private[spark] trait ShuffleWriterGroup {
 
 /**
  * Manages assigning disk-based block writers to shuffle tasks. Each shuffle task gets one file
- * per reducer (this set of files is called a ShuffleFileGroup).
- *
- * As an optimization to reduce the number of physical shuffle files produced, multiple shuffle
- * blocks are aggregated into the same file. There is one "combined shuffle file" per reducer
- * per concurrently executing shuffle task. As soon as a task finishes writing to its shuffle
- * files, it releases them for another task.
- * Regarding the implementation of this feature, shuffle files are identified by a 3-tuple:
- *   - shuffleId: The unique id given to the entire shuffle stage.
- *   - bucketId: The id of the output partition (i.e., reducer id)
- *   - fileId: The unique id identifying a group of "combined shuffle files." Only one task at a
- *       time owns a particular fileId, and this id is returned to a pool when the task finishes.
- * Each shuffle file is then mapped to a FileSegment, which is a 3-tuple (file, offset, length)
- * that specifies where in a given file the actual block data is located.
- *
- * Shuffle file metadata is stored in a space-efficient manner. Rather than simply mapping
- * ShuffleBlockIds directly to FileSegments, each ShuffleFileGroup maintains a list of offsets for
- * each block stored in each file. In order to find the location of a shuffle block, we search the
- * files within a ShuffleFileGroups associated with the block's reducer.
+ * per reducer.
  */
 // Note: Changes to the format in this file should be kept in sync with
 // org.apache.spark.network.shuffle.ExternalShuffleBlockResolver#getHashBasedShuffleBlockData().
@@ -71,26 +50,15 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
 
   private lazy val blockManager = SparkEnv.get.blockManager
 
-  // Turning off shuffle file consolidation causes all shuffle Blocks to get their own file.
-  // TODO: Remove this once the shuffle file consolidation feature is stable.
-  private val consolidateShuffleFiles =
-    conf.getBoolean("spark.shuffle.consolidateFiles", false)
-
   // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
   private val bufferSize = conf.getSizeAsKb("spark.shuffle.file.buffer", "32k").toInt * 1024
 
   /**
-   * Contains all the state related to a particular shuffle. This includes a pool of unused
-   * ShuffleFileGroups, as well as all ShuffleFileGroups that have been created for the shuffle.
+   * Contains all the state related to a particular shuffle.
    */
-  private class ShuffleState(val numBuckets: Int) {
-    val nextFileId = new AtomicInteger(0)
-    val unusedFileGroups = new ConcurrentLinkedQueue[ShuffleFileGroup]()
-    val allFileGroups = new ConcurrentLinkedQueue[ShuffleFileGroup]()
-
+  private class ShuffleState(val numReducers: Int) {
     /**
      * The mapIds of all map tasks completed on this Executor for this shuffle.
-     * NB: This is only populated if consolidateShuffleFiles is FALSE. We don't need it otherwise.
      */
     val completedMapTasks = new ConcurrentLinkedQueue[Int]()
   }
@@ -104,24 +72,16 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
    * Get a ShuffleWriterGroup for the given map task, which will register it as complete
    * when the writers are closed successfully
    */
-  def forMapTask(shuffleId: Int, mapId: Int, numBuckets: Int, serializer: Serializer,
+  def forMapTask(shuffleId: Int, mapId: Int, numReducers: Int, serializer: Serializer,
       writeMetrics: ShuffleWriteMetrics): ShuffleWriterGroup = {
     new ShuffleWriterGroup {
-      shuffleStates.putIfAbsent(shuffleId, new ShuffleState(numBuckets))
+      shuffleStates.putIfAbsent(shuffleId, new ShuffleState(numReducers))
       private val shuffleState = shuffleStates(shuffleId)
-      private var fileGroup: ShuffleFileGroup = null
 
       val openStartTime = System.nanoTime
       val serializerInstance = serializer.newInstance()
-      val writers: Array[DiskBlockObjectWriter] = if (consolidateShuffleFiles) {
-        fileGroup = getUnusedFileGroup()
-        Array.tabulate[DiskBlockObjectWriter](numBuckets) { bucketId =>
-          val blockId = ShuffleBlockId(shuffleId, mapId, bucketId)
-          blockManager.getDiskWriter(blockId, fileGroup(bucketId), serializerInstance, bufferSize,
-            writeMetrics)
-        }
-      } else {
-        Array.tabulate[DiskBlockObjectWriter](numBuckets) { bucketId =>
+      val writers: Array[DiskBlockObjectWriter] = {
+        Array.tabulate[DiskBlockObjectWriter](numReducers) { bucketId =>
           val blockId = ShuffleBlockId(shuffleId, mapId, bucketId)
           val blockFile = blockManager.diskBlockManager.getFile(blockId)
           // Because of previous failures, the shuffle file may already exist on this machine.
@@ -142,58 +102,14 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
       writeMetrics.incShuffleWriteTime(System.nanoTime - openStartTime)
 
       override def releaseWriters(success: Boolean) {
-        if (consolidateShuffleFiles) {
-          if (success) {
-            val offsets = writers.map(_.fileSegment().offset)
-            val lengths = writers.map(_.fileSegment().length)
-            fileGroup.recordMapOutput(mapId, offsets, lengths)
-          }
-          recycleFileGroup(fileGroup)
-        } else {
-          shuffleState.completedMapTasks.add(mapId)
-        }
-      }
-
-      private def getUnusedFileGroup(): ShuffleFileGroup = {
-        val fileGroup = shuffleState.unusedFileGroups.poll()
-        if (fileGroup != null) fileGroup else newFileGroup()
-      }
-
-      private def newFileGroup(): ShuffleFileGroup = {
-        val fileId = shuffleState.nextFileId.getAndIncrement()
-        val files = Array.tabulate[File](numBuckets) { bucketId =>
-          val filename = physicalFileName(shuffleId, bucketId, fileId)
-          blockManager.diskBlockManager.getFile(filename)
-        }
-        val fileGroup = new ShuffleFileGroup(shuffleId, fileId, files)
-        shuffleState.allFileGroups.add(fileGroup)
-        fileGroup
-      }
-
-      private def recycleFileGroup(group: ShuffleFileGroup) {
-        shuffleState.unusedFileGroups.add(group)
+        shuffleState.completedMapTasks.add(mapId)
       }
     }
   }
 
   override def getBlockData(blockId: ShuffleBlockId): ManagedBuffer = {
-    if (consolidateShuffleFiles) {
-      // Search all file groups associated with this shuffle.
-      val shuffleState = shuffleStates(blockId.shuffleId)
-      val iter = shuffleState.allFileGroups.iterator
-      while (iter.hasNext) {
-        val segmentOpt = iter.next.getFileSegmentFor(blockId.mapId, blockId.reduceId)
-        if (segmentOpt.isDefined) {
-          val segment = segmentOpt.get
-          return new FileSegmentManagedBuffer(
-            transportConf, segment.file, segment.offset, segment.length)
-        }
-      }
-      throw new IllegalStateException("Failed to find shuffle block: " + blockId)
-    } else {
-      val file = blockManager.diskBlockManager.getFile(blockId)
-      new FileSegmentManagedBuffer(transportConf, file, 0, file.length)
-    }
+    val file = blockManager.diskBlockManager.getFile(blockId)
+    new FileSegmentManagedBuffer(transportConf, file, 0, file.length)
   }
 
   /** Remove all the blocks / files and metadata related to a particular shuffle. */
@@ -209,17 +125,9 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
   private def removeShuffleBlocks(shuffleId: ShuffleId): Boolean = {
     shuffleStates.get(shuffleId) match {
       case Some(state) =>
-        if (consolidateShuffleFiles) {
-          for (fileGroup <- state.allFileGroups.asScala;
-               file <- fileGroup.files) {
-            file.delete()
-          }
-        } else {
-          for (mapId <- state.completedMapTasks.asScala;
-               reduceId <- 0 until state.numBuckets) {
-            val blockId = new ShuffleBlockId(shuffleId, mapId, reduceId)
-            blockManager.diskBlockManager.getFile(blockId).delete()
-          }
+        for (mapId <- state.completedMapTasks.asScala; reduceId <- 0 until state.numReducers) {
+          val blockId = new ShuffleBlockId(shuffleId, mapId, reduceId)
+          blockManager.diskBlockManager.getFile(blockId).delete()
         }
         logInfo("Deleted all files for shuffle " + shuffleId)
         true
@@ -229,10 +137,6 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
     }
   }
 
-  private def physicalFileName(shuffleId: Int, bucketId: Int, fileId: Int) = {
-    "merged_shuffle_%d_%d_%d".format(shuffleId, bucketId, fileId)
-  }
-
   private def cleanup(cleanupTime: Long) {
     shuffleStates.clearOldValues(cleanupTime, (shuffleId, state) => removeShuffleBlocks(shuffleId))
   }
@@ -241,59 +145,3 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
     metadataCleaner.cancel()
   }
 }
-
-private[spark] object FileShuffleBlockResolver {
-  /**
-   * A group of shuffle files, one per reducer.
-   * A particular mapper will be assigned a single ShuffleFileGroup to write its output to.
-   */
-  private class ShuffleFileGroup(val shuffleId: Int, val fileId: Int, val files: Array[File]) {
-    private var numBlocks: Int = 0
-
-    /**
-     * Stores the absolute index of each mapId in the files of this group. For instance,
-     * if mapId 5 is the first block in each file, mapIdToIndex(5) = 0.
-     */
-    private val mapIdToIndex = new PrimitiveKeyOpenHashMap[Int, Int]()
-
-    /**
-     * Stores consecutive offsets and lengths of blocks into each reducer file, ordered by
-     * position in the file.
-     * Note: mapIdToIndex(mapId) returns the index of the mapper into the vector for every
-     * reducer.
-     */
-    private val blockOffsetsByReducer = Array.fill[PrimitiveVector[Long]](files.length) {
-      new PrimitiveVector[Long]()
-    }
-    private val blockLengthsByReducer = Array.fill[PrimitiveVector[Long]](files.length) {
-      new PrimitiveVector[Long]()
-    }
-
-    def apply(bucketId: Int): File = files(bucketId)
-
-    def recordMapOutput(mapId: Int, offsets: Array[Long], lengths: Array[Long]) {
-      assert(offsets.length == lengths.length)
-      mapIdToIndex(mapId) = numBlocks
-      numBlocks += 1
-      for (i <- 0 until offsets.length) {
-        blockOffsetsByReducer(i) += offsets(i)
-        blockLengthsByReducer(i) += lengths(i)
-      }
-    }
-
-    /** Returns the FileSegment associated with the given map task, or None if no entry exists. */
-    def getFileSegmentFor(mapId: Int, reducerId: Int): Option[FileSegment] = {
-      val file = files(reducerId)
-      val blockOffsets = blockOffsetsByReducer(reducerId)
-      val blockLengths = blockLengthsByReducer(reducerId)
-      val index = mapIdToIndex.getOrElse(mapId, -1)
-      if (index >= 0) {
-        val offset = blockOffsets(index)
-        val length = blockLengths(index)
-        Some(new FileSegment(file, offset, length))
-      } else {
-        None
-      }
-    }
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index d31aa68eb695..bca3942f8c55 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -106,15 +106,6 @@ private[spark] class BlockManager(
     }
   }
 
-  // Check that we're not using external shuffle service with consolidated shuffle files.
-  if (externalShuffleServiceEnabled
-      && conf.getBoolean("spark.shuffle.consolidateFiles", false)
-      && shuffleManager.isInstanceOf[HashShuffleManager]) {
-    throw new UnsupportedOperationException("Cannot use external shuffle service with consolidated"
-      + " shuffle files in hash-based shuffle. Please disable spark.shuffle.consolidateFiles or "
-      + " switch to sort-based shuffle.")
-  }
-
   var blockManagerId: BlockManagerId = _
 
   // Address of the server that serves this executor's shuffle files. This is either an external
diff --git a/core/src/main/scala/org/apache/spark/storage/DiskStore.scala b/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
index 1f4595628216..feb9533604ff 100644
--- a/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
+++ b/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
@@ -154,9 +154,6 @@ private[spark] class DiskStore(blockManager: BlockManager, diskManager: DiskBloc
 
   override def remove(blockId: BlockId): Boolean = {
     val file = diskManager.getFile(blockId.name)
-    // If consolidation mode is used With HashShuffleMananger, the physical filename for the block
-    // is different from blockId.name. So the file returns here will not be exist, thus we avoid to
-    // delete the whole consolidated file by mistake.
     if (file.exists()) {
       file.delete()
     } else {
diff --git a/core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleManagerSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleManagerSuite.scala
deleted file mode 100644
index 491dc3659e18..000000000000
--- a/core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleManagerSuite.scala
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle.hash
-
-import java.io.{File, FileWriter}
-
-import scala.language.reflectiveCalls
-
-import org.apache.spark.{LocalSparkContext, SparkConf, SparkContext, SparkEnv, SparkFunSuite}
-import org.apache.spark.executor.ShuffleWriteMetrics
-import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
-import org.apache.spark.serializer.JavaSerializer
-import org.apache.spark.shuffle.FileShuffleBlockResolver
-import org.apache.spark.storage.{ShuffleBlockId, FileSegment}
-
-class HashShuffleManagerSuite extends SparkFunSuite with LocalSparkContext {
-  private val testConf = new SparkConf(false)
-
-  private def checkSegments(expected: FileSegment, buffer: ManagedBuffer) {
-    assert(buffer.isInstanceOf[FileSegmentManagedBuffer])
-    val segment = buffer.asInstanceOf[FileSegmentManagedBuffer]
-    assert(expected.file.getCanonicalPath === segment.getFile.getCanonicalPath)
-    assert(expected.offset === segment.getOffset)
-    assert(expected.length === segment.getLength)
-  }
-
-  test("consolidated shuffle can write to shuffle group without messing existing offsets/lengths") {
-
-    val conf = new SparkConf(false)
-    // reset after EACH object write. This is to ensure that there are bytes appended after
-    // an object is written. So if the codepaths assume writeObject is end of data, this should
-    // flush those bugs out. This was common bug in ExternalAppendOnlyMap, etc.
-    conf.set("spark.serializer.objectStreamReset", "1")
-    conf.set("spark.serializer", "org.apache.spark.serializer.JavaSerializer")
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.hash.HashShuffleManager")
-
-    sc = new SparkContext("local", "test", conf)
-
-    val shuffleBlockResolver =
-      SparkEnv.get.shuffleManager.shuffleBlockResolver.asInstanceOf[FileShuffleBlockResolver]
-
-    val shuffle1 = shuffleBlockResolver.forMapTask(1, 1, 1, new JavaSerializer(conf),
-      new ShuffleWriteMetrics)
-    for (writer <- shuffle1.writers) {
-      writer.write("test1", "value")
-      writer.write("test2", "value")
-    }
-    for (writer <- shuffle1.writers) {
-      writer.commitAndClose()
-    }
-
-    val shuffle1Segment = shuffle1.writers(0).fileSegment()
-    shuffle1.releaseWriters(success = true)
-
-    val shuffle2 = shuffleBlockResolver.forMapTask(1, 2, 1, new JavaSerializer(conf),
-      new ShuffleWriteMetrics)
-
-    for (writer <- shuffle2.writers) {
-      writer.write("test3", "value")
-      writer.write("test4", "vlue")
-    }
-    for (writer <- shuffle2.writers) {
-      writer.commitAndClose()
-    }
-    val shuffle2Segment = shuffle2.writers(0).fileSegment()
-    shuffle2.releaseWriters(success = true)
-
-    // Now comes the test :
-    // Write to shuffle 3; and close it, but before registering it, check if the file lengths for
-    // previous task (forof shuffle1) is the same as 'segments'. Earlier, we were inferring length
-    // of block based on remaining data in file : which could mess things up when there is
-    // concurrent read and writes happening to the same shuffle group.
-
-    val shuffle3 = shuffleBlockResolver.forMapTask(1, 3, 1, new JavaSerializer(testConf),
-      new ShuffleWriteMetrics)
-    for (writer <- shuffle3.writers) {
-      writer.write("test3", "value")
-      writer.write("test4", "value")
-    }
-    for (writer <- shuffle3.writers) {
-      writer.commitAndClose()
-    }
-    // check before we register.
-    checkSegments(shuffle2Segment, shuffleBlockResolver.getBlockData(ShuffleBlockId(1, 2, 0)))
-    shuffle3.releaseWriters(success = true)
-    checkSegments(shuffle2Segment, shuffleBlockResolver.getBlockData(ShuffleBlockId(1, 2, 0)))
-    shuffleBlockResolver.removeShuffle(1)
-  }
-
-  def writeToFile(file: File, numBytes: Int) {
-    val writer = new FileWriter(file, true)
-    for (i <- 0 until numBytes) writer.write(i)
-    writer.close()
-  }
-}
diff --git a/docs/configuration.md b/docs/configuration.md
index 1a701f18881f..3700051efb44 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -390,16 +390,6 @@ Apart from these, the following properties are also available, and may be useful
     <code>spark.io.compression.codec</code>.
   </td>
 </tr>
-<tr>
-  <td><code>spark.shuffle.consolidateFiles</code></td>
-  <td>false</td>
-  <td>
-    If set to "true", consolidates intermediate files created during a shuffle. Creating fewer
-    files can improve filesystem performance for shuffles with large numbers of reduce tasks. It
-    is recommended to set this to "true" when using ext4 or xfs filesystems. On ext3, this option
-    might degrade performance on machines with many (>8) cores due to filesystem limitations.
-  </td>
-</tr>
 <tr>
   <td><code>spark.shuffle.file.buffer</code></td>
   <td>32k</td>
diff --git a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
index 79beec4429a9..c5f93bb47f55 100644
--- a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
+++ b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
@@ -50,9 +50,6 @@
  * of Executors. Each Executor must register its own configuration about where it stores its files
  * (local dirs) and how (shuffle manager). The logic for retrieval of individual files is replicated
  * from Spark's FileShuffleBlockResolver and IndexShuffleBlockResolver.
- *
- * Executors with shuffle file consolidation are not currently supported, as the index is stored in
- * the Executor's memory, unlike the IndexShuffleBlockResolver.
  */
 public class ExternalShuffleBlockResolver {
   private static final Logger logger = LoggerFactory.getLogger(ExternalShuffleBlockResolver.class);
@@ -254,7 +251,6 @@ private void deleteExecutorDirs(String[] dirs) {
    * Hash-based shuffle data is simply stored as one file per block.
    * This logic is from FileShuffleBlockResolver.
    */
-  // TODO: Support consolidated hash shuffle files
   private ManagedBuffer getHashBasedShuffleBlockData(ExecutorShuffleInfo executor, String blockId) {
     File shuffleFile = getFile(executor.localDirs, executor.subDirsPerLocalDir, blockId);
     return new FileSegmentManagedBuffer(conf, shuffleFile, 0, shuffleFile.length());
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 1c96b0958586..814a11e588ce 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -70,6 +70,10 @@ object MimaExcludes {
           "org.apache.spark.scheduler.AskPermissionToCommitOutput.this"),
         ProblemFilters.exclude[IncompatibleMethTypeProblem](
           "org.apache.spark.scheduler.AskPermissionToCommitOutput.apply")
+      ) ++
+      Seq(
+        ProblemFilters.exclude[MissingClassProblem](
+          "org.apache.spark.shuffle.FileShuffleBlockResolver$ShuffleFileGroup")
       )
     case v if v.startsWith("1.5") =>
       Seq(

From 8074208fa47fa654c1055c48cfa0d923edeeb04f Mon Sep 17 00:00:00 2001
From: Mingyu Kim <mkim@palantir.com>
Date: Fri, 18 Sep 2015 15:40:58 -0700
Subject: [PATCH 033/896] [SPARK-10611] Clone Configuration for each task for
 NewHadoopRDD

This patch attempts to fix the Hadoop Configuration thread safety issue for NewHadoopRDD in the same way SPARK-2546 fixed the issue for HadoopRDD.

Author: Mingyu Kim <mkim@palantir.com>

Closes #8763 from mingyukim/mkim/SPARK-10611.
---
 .../org/apache/spark/rdd/BinaryFileRDD.scala  |  5 ++-
 .../org/apache/spark/rdd/NewHadoopRDD.scala   | 37 ++++++++++++++++---
 2 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/BinaryFileRDD.scala b/core/src/main/scala/org/apache/spark/rdd/BinaryFileRDD.scala
index 6fec00dcd0d8..aedced7408cd 100644
--- a/core/src/main/scala/org/apache/spark/rdd/BinaryFileRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/BinaryFileRDD.scala
@@ -34,12 +34,13 @@ private[spark] class BinaryFileRDD[T](
 
   override def getPartitions: Array[Partition] = {
     val inputFormat = inputFormatClass.newInstance
+    val conf = getConf
     inputFormat match {
       case configurable: Configurable =>
-        configurable.setConf(getConf)
+        configurable.setConf(conf)
       case _ =>
     }
-    val jobContext = newJobContext(getConf, jobId)
+    val jobContext = newJobContext(conf, jobId)
     inputFormat.setMinPartitions(jobContext, minPartitions)
     val rawSplits = inputFormat.getSplits(jobContext).toArray
     val result = new Array[Partition](rawSplits.size)
diff --git a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
index 174979aaeb23..2872b93b8730 100644
--- a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
@@ -44,7 +44,6 @@ private[spark] class NewHadoopPartition(
   extends Partition {
 
   val serializableHadoopSplit = new SerializableWritable(rawSplit)
-
   override def hashCode(): Int = 41 * (41 + rddId) + index
 }
 
@@ -84,6 +83,27 @@ class NewHadoopRDD[K, V](
 
   @transient protected val jobId = new JobID(jobTrackerId, id)
 
+  private val shouldCloneJobConf = sparkContext.conf.getBoolean("spark.hadoop.cloneConf", false)
+
+  def getConf: Configuration = {
+    val conf: Configuration = confBroadcast.value.value
+    if (shouldCloneJobConf) {
+      // Hadoop Configuration objects are not thread-safe, which may lead to various problems if
+      // one job modifies a configuration while another reads it (SPARK-2546, SPARK-10611).  This
+      // problem occurs somewhat rarely because most jobs treat the configuration as though it's
+      // immutable.  One solution, implemented here, is to clone the Configuration object.
+      // Unfortunately, this clone can be very expensive.  To avoid unexpected performance
+      // regressions for workloads and Hadoop versions that do not suffer from these thread-safety
+      // issues, this cloning is disabled by default.
+      NewHadoopRDD.CONFIGURATION_INSTANTIATION_LOCK.synchronized {
+        logDebug("Cloning Hadoop Configuration")
+        new Configuration(conf)
+      }
+    } else {
+      conf
+    }
+  }
+
   override def getPartitions: Array[Partition] = {
     val inputFormat = inputFormatClass.newInstance
     inputFormat match {
@@ -104,7 +124,7 @@ class NewHadoopRDD[K, V](
     val iter = new Iterator[(K, V)] {
       val split = theSplit.asInstanceOf[NewHadoopPartition]
       logInfo("Input split: " + split.serializableHadoopSplit)
-      val conf = confBroadcast.value.value
+      val conf = getConf
 
       val inputMetrics = context.taskMetrics
         .getInputMetricsForReadMethod(DataReadMethod.Hadoop)
@@ -230,11 +250,15 @@ class NewHadoopRDD[K, V](
     super.persist(storageLevel)
   }
 
-
-  def getConf: Configuration = confBroadcast.value.value
 }
 
 private[spark] object NewHadoopRDD {
+  /**
+   * Configuration's constructor is not threadsafe (see SPARK-1097 and HADOOP-10456).
+   * Therefore, we synchronize on this lock before calling new Configuration().
+   */
+  val CONFIGURATION_INSTANTIATION_LOCK = new Object()
+
   /**
    * Analogous to [[org.apache.spark.rdd.MapPartitionsRDD]], but passes in an InputSplit to
    * the given function rather than the index of the partition.
@@ -268,12 +292,13 @@ private[spark] class WholeTextFileRDD(
 
   override def getPartitions: Array[Partition] = {
     val inputFormat = inputFormatClass.newInstance
+    val conf = getConf
     inputFormat match {
       case configurable: Configurable =>
-        configurable.setConf(getConf)
+        configurable.setConf(conf)
       case _ =>
     }
-    val jobContext = newJobContext(getConf, jobId)
+    val jobContext = newJobContext(conf, jobId)
     inputFormat.setMinPartitions(jobContext, minPartitions)
     val rawSplits = inputFormat.getSplits(jobContext).toArray
     val result = new Array[Partition](rawSplits.size)

From c8149ef2c57f5c47ab97ee8d8d58a216d4bc4156 Mon Sep 17 00:00:00 2001
From: Eric Liang <ekl@databricks.com>
Date: Fri, 18 Sep 2015 16:23:05 -0700
Subject: [PATCH 034/896] [MINOR] [ML] override toString of AttributeGroup

This makes equality test failures much more readable.

mengxr

Author: Eric Liang <ekl@databricks.com>
Author: Eric Liang <ekhliang@gmail.com>

Closes #8826 from ericl/attrgroupstr.
---
 .../scala/org/apache/spark/ml/attribute/AttributeGroup.scala    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala b/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
index 457c15830fd3..2c29eeb01a92 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/attribute/AttributeGroup.scala
@@ -183,6 +183,8 @@ class AttributeGroup private (
     sum = 37 * sum + attributes.map(_.toSeq).hashCode
     sum
   }
+
+  override def toString: String = toMetadata.toString
 }
 
 /**

From 22be2ae147a111e88896f6fb42ed46bbf108a99b Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Fri, 18 Sep 2015 18:42:20 -0700
Subject: [PATCH 035/896] [SPARK-10623] [SQL] Fixes ORC predicate push-down

When pushing down a leaf predicate, ORC `SearchArgument` builder requires an extra "parent" predicate (any one among `AND`/`OR`/`NOT`) to wrap the leaf predicate. E.g., to push down `a < 1`, we must build `AND(a < 1)` instead. Fortunately, when actually constructing the `SearchArgument`, the builder will eliminate all those unnecessary wrappers.

This PR is based on #8783 authored by zhzhan. I also took the chance to simply `OrcFilters` a little bit to improve readability.

Author: Cheng Lian <lian@databricks.com>

Closes #8799 from liancheng/spark-10623/fix-orc-ppd.
---
 .../spark/sql/hive/orc/OrcFilters.scala       | 56 ++++++++-----------
 .../spark/sql/hive/orc/OrcQuerySuite.scala    | 30 ++++++++++
 2 files changed, 52 insertions(+), 34 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcFilters.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcFilters.scala
index b3d9f7f71a27..27193f54d3a9 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcFilters.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcFilters.scala
@@ -31,11 +31,13 @@ import org.apache.spark.sql.sources._
  * and cannot be used anymore.
  */
 private[orc] object OrcFilters extends Logging {
-  def createFilter(expr: Array[Filter]): Option[SearchArgument] = {
-    expr.reduceOption(And).flatMap { conjunction =>
-      val builder = SearchArgumentFactory.newBuilder()
-      buildSearchArgument(conjunction, builder).map(_.build())
-    }
+  def createFilter(filters: Array[Filter]): Option[SearchArgument] = {
+    for {
+      // Combines all filters with `And`s to produce a single conjunction predicate
+      conjunction <- filters.reduceOption(And)
+      // Then tries to build a single ORC `SearchArgument` for the conjunction predicate
+      builder <- buildSearchArgument(conjunction, SearchArgumentFactory.newBuilder())
+    } yield builder.build()
   }
 
   private def buildSearchArgument(expression: Filter, builder: Builder): Option[Builder] = {
@@ -102,46 +104,32 @@ private[orc] object OrcFilters extends Logging {
           negate <- buildSearchArgument(child, builder.startNot())
         } yield negate.end()
 
-      case EqualTo(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.equals(attribute, _))
+      case EqualTo(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startAnd().equals(attribute, value).end())
 
-      case EqualNullSafe(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.nullSafeEquals(attribute, _))
+      case EqualNullSafe(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startAnd().nullSafeEquals(attribute, value).end())
 
-      case LessThan(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.lessThan(attribute, _))
+      case LessThan(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startAnd().lessThan(attribute, value).end())
 
-      case LessThanOrEqual(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.lessThanEquals(attribute, _))
+      case LessThanOrEqual(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startAnd().lessThanEquals(attribute, value).end())
 
-      case GreaterThan(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.startNot().lessThanEquals(attribute, _).end())
+      case GreaterThan(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startNot().lessThanEquals(attribute, value).end())
 
-      case GreaterThanOrEqual(attribute, value) =>
-        Option(value)
-          .filter(isSearchableLiteral)
-          .map(builder.startNot().lessThan(attribute, _).end())
+      case GreaterThanOrEqual(attribute, value) if isSearchableLiteral(value) =>
+        Some(builder.startNot().lessThan(attribute, value).end())
 
       case IsNull(attribute) =>
-        Some(builder.isNull(attribute))
+        Some(builder.startAnd().isNull(attribute).end())
 
       case IsNotNull(attribute) =>
         Some(builder.startNot().isNull(attribute).end())
 
-      case In(attribute, values) =>
-        Option(values)
-          .filter(_.forall(isSearchableLiteral))
-          .map(builder.in(attribute, _))
+      case In(attribute, values) if values.forall(isSearchableLiteral) =>
+        Some(builder.startAnd().in(attribute, values.map(_.asInstanceOf[AnyRef]): _*).end())
 
       case _ => None
     }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
index 8bc33fcf5d90..5eb39b112970 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
@@ -344,4 +344,34 @@ class OrcQuerySuite extends QueryTest with BeforeAndAfterAll with OrcTest {
       }
     }
   }
+
+  test("SPARK-10623 Enable ORC PPD") {
+    withTempPath { dir =>
+      withSQLConf(SQLConf.ORC_FILTER_PUSHDOWN_ENABLED.key -> "true") {
+        import testImplicits._
+
+        val path = dir.getCanonicalPath
+        sqlContext.range(10).coalesce(1).write.orc(path)
+        val df = sqlContext.read.orc(path)
+
+        def checkPredicate(pred: Column, answer: Seq[Long]): Unit = {
+          checkAnswer(df.where(pred), answer.map(Row(_)))
+        }
+
+        checkPredicate('id === 5, Seq(5L))
+        checkPredicate('id <=> 5, Seq(5L))
+        checkPredicate('id < 5, 0L to 4L)
+        checkPredicate('id <= 5, 0L to 5L)
+        checkPredicate('id > 5, 6L to 9L)
+        checkPredicate('id >= 5, 5L to 9L)
+        checkPredicate('id.isNull, Seq.empty[Long])
+        checkPredicate('id.isNotNull, 0L to 9L)
+        checkPredicate('id.isin(1L, 3L, 5L), Seq(1L, 3L, 5L))
+        checkPredicate('id > 0 && 'id < 3, 1L to 2L)
+        checkPredicate('id < 1 || 'id > 8, Seq(0L, 9L))
+        checkPredicate(!('id > 3), 0L to 3L)
+        checkPredicate(!('id > 0 && 'id < 3), Seq(0L) ++ (3L to 9L))
+      }
+    }
+  }
 }

From 7ff8d68cc19299e16dedfd819b9e96480fa6cf44 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Fri, 18 Sep 2015 23:58:25 -0700
Subject: [PATCH 036/896] [SPARK-10474] [SQL] Aggregation fails to allocate
 memory for pointer array

When `TungstenAggregation` hits memory pressure, it switches from hash-based to sort-based aggregation in-place. However, in the process we try to allocate the pointer array for writing to the new `UnsafeExternalSorter` *before* actually freeing the memory from the hash map. This lead to the following exception:
```
 java.io.IOException: Could not acquire 65536 bytes of memory
        at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.initializeForWriting(UnsafeExternalSorter.java:169)
        at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.spill(UnsafeExternalSorter.java:220)
        at org.apache.spark.sql.execution.UnsafeKVExternalSorter.<init>(UnsafeKVExternalSorter.java:126)
        at org.apache.spark.sql.execution.UnsafeFixedWidthAggregationMap.destructAndCreateExternalSorter(UnsafeFixedWidthAggregationMap.java:257)
        at org.apache.spark.sql.execution.aggregate.TungstenAggregationIterator.switchToSortBasedAggregation(TungstenAggregationIterator.scala:435)
```

Author: Andrew Or <andrew@databricks.com>

Closes #8827 from andrewor14/allocate-pointer-array.
---
 .../unsafe/sort/UnsafeExternalSorter.java     | 14 +++++-
 .../sql/execution/UnsafeKVExternalSorter.java |  8 ++-
 .../UnsafeFixedWidthAggregationMapSuite.scala | 49 ++++++++++++++++++-
 3 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index fc364e0a895b..14b6aafdea7d 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -159,7 +159,7 @@ public BoxedUnit apply() {
   /**
    * Allocates new sort data structures. Called when creating the sorter and after each spill.
    */
-  private void initializeForWriting() throws IOException {
+  public void initializeForWriting() throws IOException {
     this.writeMetrics = new ShuffleWriteMetrics();
     final long pointerArrayMemory =
       UnsafeInMemorySorter.getMemoryRequirementsForPointerArray(initialSize);
@@ -187,6 +187,14 @@ public void closeCurrentPage() {
    * Sort and spill the current records in response to memory pressure.
    */
   public void spill() throws IOException {
+    spill(true);
+  }
+
+  /**
+   * Sort and spill the current records in response to memory pressure.
+   * @param shouldInitializeForWriting whether to allocate memory for writing after the spill
+   */
+  public void spill(boolean shouldInitializeForWriting) throws IOException {
     assert(inMemSorter != null);
     logger.info("Thread {} spilling sort data of {} to disk ({} {} so far)",
       Thread.currentThread().getId(),
@@ -217,7 +225,9 @@ public void spill() throws IOException {
     // written to disk. This also counts the space needed to store the sorter's pointer array.
     taskContext.taskMetrics().incMemoryBytesSpilled(spillSize);
 
-    initializeForWriting();
+    if (shouldInitializeForWriting) {
+      initializeForWriting();
+    }
   }
 
   /**
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index 7db6b7ff50f2..b81f67a16b81 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -85,6 +85,7 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
       // We will use the number of elements in the map as the initialSize of the
       // UnsafeInMemorySorter. Because UnsafeInMemorySorter does not accept 0 as the initialSize,
       // we will use 1 as its initial size if the map is empty.
+      // TODO: track pointer array memory used by this in-memory sorter!
       final UnsafeInMemorySorter inMemSorter = new UnsafeInMemorySorter(
         taskMemoryManager, recordComparator, prefixComparator, Math.max(1, map.numElements()));
 
@@ -123,8 +124,13 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
         pageSizeBytes,
         inMemSorter);
 
-      sorter.spill();
+      // Note: This spill doesn't actually release any memory, so if we try to allocate a new
+      // pointer array immediately after the spill then we may fail to acquire sufficient space
+      // for it (SPARK-10474). For this reason, we must initialize for writing explicitly *after*
+      // we have actually freed memory from our map.
+      sorter.spill(false /* initialize for writing */);
       map.free();
+      sorter.initializeForWriting();
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
index d1f0b2b1fc52..ada4d42f991c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
@@ -23,9 +23,10 @@ import scala.util.{Try, Random}
 
 import org.scalatest.Matchers
 
-import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
 import org.apache.spark.{TaskContextImpl, TaskContext, SparkFunSuite}
+import org.apache.spark.shuffle.ShuffleMemoryManager
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator, TaskMemoryManager}
@@ -325,7 +326,7 @@ class UnsafeFixedWidthAggregationMapSuite
       // At here, we also test if copy is correct.
       iter.getKey.copy()
       iter.getValue.copy()
-      count += 1;
+      count += 1
     }
 
     // 1 record was from the map and 4096 records were explicitly inserted.
@@ -333,4 +334,48 @@ class UnsafeFixedWidthAggregationMapSuite
 
     map.free()
   }
+
+  testWithMemoryLeakDetection("convert to external sorter under memory pressure (SPARK-10474)") {
+    val smm = ShuffleMemoryManager.createForTesting(65536)
+    val pageSize = 4096
+    val map = new UnsafeFixedWidthAggregationMap(
+      emptyAggregationBuffer,
+      aggBufferSchema,
+      groupKeySchema,
+      taskMemoryManager,
+      smm,
+      128, // initial capacity
+      pageSize,
+      false // disable perf metrics
+    )
+
+    // Insert into the map until we've run out of space
+    val rand = new Random(42)
+    var hasSpace = true
+    while (hasSpace) {
+      val str = rand.nextString(1024)
+      val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
+      if (buf == null) {
+        hasSpace = false
+      } else {
+        buf.setInt(0, str.length)
+      }
+    }
+
+    // Ensure we're actually maxed out by asserting that we can't acquire even just 1 byte
+    assert(smm.tryToAcquire(1) === 0)
+
+    // Convert the map into a sorter. This used to fail before the fix for SPARK-10474
+    // because we would try to acquire space for the in-memory sorter pointer array before
+    // actually releasing the pages despite having spilled all of them.
+    var sorter: UnsafeKVExternalSorter = null
+    try {
+      sorter = map.destructAndCreateExternalSorter()
+    } finally {
+      if (sorter != null) {
+        sorter.cleanupResources()
+      }
+    }
+  }
+
 }

From d507f9c0b7f7a524137a694ed6443747aaf90463 Mon Sep 17 00:00:00 2001
From: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Date: Sat, 19 Sep 2015 01:59:36 -0700
Subject: [PATCH 037/896] [SPARK-10584] [SQL] [DOC] Documentation about the
 compatible Hive version is wrong.

In Spark 1.5.0, Spark SQL is compatible with Hive 0.12.0 through 1.2.1 but the documentation is wrong.

/CC yhuai

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #8776 from sarutak/SPARK-10584-2.
---
 docs/sql-programming-guide.md | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index a0b911d20724..82d4243cc6b2 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1954,7 +1954,7 @@ without the need to write any code.
 ## Running the Thrift JDBC/ODBC server
 
 The Thrift JDBC/ODBC server implemented here corresponds to the [`HiveServer2`](https://cwiki.apache.org/confluence/display/Hive/Setting+Up+HiveServer2)
-in Hive 0.13. You can test the JDBC server with the beeline script that comes with either Spark or Hive 0.13.
+in Hive 1.2.1 You can test the JDBC server with the beeline script that comes with either Spark or Hive 1.2.1.
 
 To start the JDBC/ODBC server, run the following in the Spark directory:
 
@@ -2260,8 +2260,10 @@ Several caching related features are not supported yet:
 
 ## Compatibility with Apache Hive
 
-Spark SQL is designed to be compatible with the Hive Metastore, SerDes and UDFs.  Currently Spark
-SQL is based on Hive 0.12.0 and 0.13.1.
+Spark SQL is designed to be compatible with the Hive Metastore, SerDes and UDFs.
+Currently Hive SerDes and UDFs are based on Hive 1.2.1,
+and Spark SQL can be connected to different versions of Hive Metastore
+(from 0.12.0 to 1.2.1. Also see http://spark.apache.org/docs/latest/sql-programming-guide.html#interacting-with-different-versions-of-hive-metastore).
 
 #### Deploying in Existing Hive Warehouses
 

From d83b6aae8b4357c56779cc98804eb350ab8af62d Mon Sep 17 00:00:00 2001
From: Alexis Seigneurin <alexis.seigneurin@gmail.com>
Date: Sat, 19 Sep 2015 12:01:22 +0100
Subject: [PATCH 038/896] Fixed links to the API

Submitting this change on the master branch as requested in https://github.com/apache/spark/pull/8819#issuecomment-141505941

Author: Alexis Seigneurin <alexis.seigneurin@gmail.com>

Closes #8838 from aseigneurin/patch-2.
---
 docs/ml-guide.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index c5d7f990021f..0427ac6695aa 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -619,13 +619,13 @@ for row in selected.collect():
 An important task in ML is *model selection*, or using data to find the best model or parameters for a given task.  This is also called *tuning*.
 `Pipeline`s facilitate model selection by making it easy to tune an entire `Pipeline` at once, rather than tuning each element in the `Pipeline` separately.
 
-Currently, `spark.ml` supports model selection using the [`CrossValidator`](api/scala/index.html#org.apache.spark.ml.tuning.CrossValidator) class, which takes an `Estimator`, a set of `ParamMap`s, and an [`Evaluator`](api/scala/index.html#org.apache.spark.ml.Evaluator).
+Currently, `spark.ml` supports model selection using the [`CrossValidator`](api/scala/index.html#org.apache.spark.ml.tuning.CrossValidator) class, which takes an `Estimator`, a set of `ParamMap`s, and an [`Evaluator`](api/scala/index.html#org.apache.spark.ml.evaluation.Evaluator).
 `CrossValidator` begins by splitting the dataset into a set of *folds* which are used as separate training and test datasets; e.g., with `$k=3$` folds, `CrossValidator` will generate 3 (training, test) dataset pairs, each of which uses 2/3 of the data for training and 1/3 for testing.
 `CrossValidator` iterates through the set of `ParamMap`s. For each `ParamMap`, it trains the given `Estimator` and evaluates it using the given `Evaluator`.
 
-The `Evaluator` can be a [`RegressionEvaluator`](api/scala/index.html#org.apache.spark.ml.RegressionEvaluator)
-for regression problems, a [`BinaryClassificationEvaluator`](api/scala/index.html#org.apache.spark.ml.BinaryClassificationEvaluator)
-for binary data, or a [`MultiClassClassificationEvaluator`](api/scala/index.html#org.apache.spark.ml.MultiClassClassificationEvaluator)
+The `Evaluator` can be a [`RegressionEvaluator`](api/scala/index.html#org.apache.spark.ml.evaluation.RegressionEvaluator)
+for regression problems, a [`BinaryClassificationEvaluator`](api/scala/index.html#org.apache.spark.ml.evaluation.BinaryClassificationEvaluator)
+for binary data, or a [`MultiClassClassificationEvaluator`](api/scala/index.html#org.apache.spark.ml.evaluation.MultiClassClassificationEvaluator)
 for multiclass problems. The default metric used to choose the best `ParamMap` can be overriden by the `setMetric`
 method in each of these evaluators.
 

From e789000b88a6bd840f821c53f42c08b97dc02496 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Sat, 19 Sep 2015 18:22:43 -0700
Subject: [PATCH 039/896] [SPARK-10155] [SQL] Change SqlParser to object to
 avoid memory leak

Since `scala.util.parsing.combinator.Parsers` is thread-safe since Scala 2.10 (See [SI-4929](https://issues.scala-lang.org/browse/SI-4929)), we can change SqlParser to object to avoid memory leak.

I didn't change other subclasses of `scala.util.parsing.combinator.Parsers` because there is only one instance in one SQLContext, which should not be an issue.

Author: zsxwing <zsxwing@gmail.com>

Closes #8357 from zsxwing/sql-memory-leak.
---
 .../apache/spark/sql/catalyst/AbstractSparkSQLParser.scala  | 2 +-
 .../scala/org/apache/spark/sql/catalyst/ParserDialect.scala | 2 +-
 .../scala/org/apache/spark/sql/catalyst/SqlParser.scala     | 6 +++---
 .../src/main/scala/org/apache/spark/sql/DataFrame.scala     | 6 +++---
 .../main/scala/org/apache/spark/sql/DataFrameWriter.scala   | 4 ++--
 .../src/main/scala/org/apache/spark/sql/SQLContext.scala    | 6 +++---
 .../src/main/scala/org/apache/spark/sql/functions.scala     | 2 +-
 .../main/scala/org/apache/spark/sql/hive/HiveContext.scala  | 6 +++---
 .../org/apache/spark/sql/hive/HiveMetastoreCatalog.scala    | 4 ++--
 9 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
index 5898a5f93f38..2bac08eac4fe 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
@@ -28,7 +28,7 @@ import org.apache.spark.sql.catalyst.plans.logical._
 private[sql] abstract class AbstractSparkSQLParser
   extends StandardTokenParsers with PackratParsers {
 
-  def parse(input: String): LogicalPlan = {
+  def parse(input: String): LogicalPlan = synchronized {
     // Initialize the Keywords.
     initLexical
     phrase(start)(new lexical.Scanner(input)) match {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ParserDialect.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ParserDialect.scala
index 554fb4eb25eb..e21d3c05464b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ParserDialect.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ParserDialect.scala
@@ -61,7 +61,7 @@ abstract class ParserDialect {
  */
 private[spark] class DefaultParserDialect extends ParserDialect {
   @transient
-  protected val sqlParser = new SqlParser
+  protected val sqlParser = SqlParser
 
   override def parse(sqlText: String): LogicalPlan = {
     sqlParser.parse(sqlText)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index f2498861c957..dfab2398857e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -37,9 +37,9 @@ import org.apache.spark.unsafe.types.CalendarInterval
  * This is currently included mostly for illustrative purposes.  Users wanting more complete support
  * for a SQL like language should checkout the HiveQL support in the sql/hive sub-project.
  */
-class SqlParser extends AbstractSparkSQLParser with DataTypeParser {
+object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
 
-  def parseExpression(input: String): Expression = {
+  def parseExpression(input: String): Expression = synchronized {
     // Initialize the Keywords.
     initLexical
     phrase(projection)(new lexical.Scanner(input)) match {
@@ -48,7 +48,7 @@ class SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     }
   }
 
-  def parseTableIdentifier(input: String): TableIdentifier = {
+  def parseTableIdentifier(input: String): TableIdentifier = synchronized {
     // Initialize the Keywords.
     initLexical
     phrase(tableIdentifier)(new lexical.Scanner(input)) match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 3e61123c145c..8f737c202393 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -720,7 +720,7 @@ class DataFrame private[sql](
   @scala.annotation.varargs
   def selectExpr(exprs: String*): DataFrame = {
     select(exprs.map { expr =>
-      Column(new SqlParser().parseExpression(expr))
+      Column(SqlParser.parseExpression(expr))
     }: _*)
   }
 
@@ -745,7 +745,7 @@ class DataFrame private[sql](
    * @since 1.3.0
    */
   def filter(conditionExpr: String): DataFrame = {
-    filter(Column(new SqlParser().parseExpression(conditionExpr)))
+    filter(Column(SqlParser.parseExpression(conditionExpr)))
   }
 
   /**
@@ -769,7 +769,7 @@ class DataFrame private[sql](
    * @since 1.5.0
    */
   def where(conditionExpr: String): DataFrame = {
-    filter(Column(new SqlParser().parseExpression(conditionExpr)))
+    filter(Column(SqlParser.parseExpression(conditionExpr)))
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
index 745bb4ec9cf1..03e973666e88 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
@@ -163,7 +163,7 @@ final class DataFrameWriter private[sql](df: DataFrame) {
    * @since 1.4.0
    */
   def insertInto(tableName: String): Unit = {
-    insertInto(new SqlParser().parseTableIdentifier(tableName))
+    insertInto(SqlParser.parseTableIdentifier(tableName))
   }
 
   private def insertInto(tableIdent: TableIdentifier): Unit = {
@@ -197,7 +197,7 @@ final class DataFrameWriter private[sql](df: DataFrame) {
    * @since 1.4.0
    */
   def saveAsTable(tableName: String): Unit = {
-    saveAsTable(new SqlParser().parseTableIdentifier(tableName))
+    saveAsTable(SqlParser.parseTableIdentifier(tableName))
   }
 
   private def saveAsTable(tableIdent: TableIdentifier): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index e3fdd782e6ff..f099940800cc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -590,7 +590,7 @@ class SQLContext(@transient val sparkContext: SparkContext)
       tableName: String,
       source: String,
       options: Map[String, String]): DataFrame = {
-    val tableIdent = new SqlParser().parseTableIdentifier(tableName)
+    val tableIdent = SqlParser.parseTableIdentifier(tableName)
     val cmd =
       CreateTableUsing(
         tableIdent,
@@ -636,7 +636,7 @@ class SQLContext(@transient val sparkContext: SparkContext)
       source: String,
       schema: StructType,
       options: Map[String, String]): DataFrame = {
-    val tableIdent = new SqlParser().parseTableIdentifier(tableName)
+    val tableIdent = SqlParser.parseTableIdentifier(tableName)
     val cmd =
       CreateTableUsing(
         tableIdent,
@@ -732,7 +732,7 @@ class SQLContext(@transient val sparkContext: SparkContext)
    * @since 1.3.0
    */
   def table(tableName: String): DataFrame = {
-    table(new SqlParser().parseTableIdentifier(tableName))
+    table(SqlParser.parseTableIdentifier(tableName))
   }
 
   private def table(tableIdent: TableIdentifier): DataFrame = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 60d9c509104d..2467b4e48415 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -823,7 +823,7 @@ object functions {
    *
    * @group normal_funcs
    */
-  def expr(expr: String): Column = Column(new SqlParser().parseExpression(expr))
+  def expr(expr: String): Column = Column(SqlParser.parseExpression(expr))
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Math Functions
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index d37ba5ddc2d8..c12a73486332 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -291,12 +291,12 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
    * @since 1.3.0
    */
   def refreshTable(tableName: String): Unit = {
-    val tableIdent = new SqlParser().parseTableIdentifier(tableName)
+    val tableIdent = SqlParser.parseTableIdentifier(tableName)
     catalog.refreshTable(tableIdent)
   }
 
   protected[hive] def invalidateTable(tableName: String): Unit = {
-    val tableIdent = new SqlParser().parseTableIdentifier(tableName)
+    val tableIdent = SqlParser.parseTableIdentifier(tableName)
     catalog.invalidateTable(tableIdent)
   }
 
@@ -311,7 +311,7 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
    */
   @Experimental
   def analyze(tableName: String) {
-    val tableIdent = new SqlParser().parseTableIdentifier(tableName)
+    val tableIdent = SqlParser.parseTableIdentifier(tableName)
     val relation = EliminateSubQueries(catalog.lookupRelation(tableIdent.toSeq))
 
     relation match {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index 0a5569b0a444..0c1b41e3377e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -199,7 +199,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       options: Map[String, String],
       isExternal: Boolean): Unit = {
     createDataSourceTable(
-      new SqlParser().parseTableIdentifier(tableName),
+      SqlParser.parseTableIdentifier(tableName),
       userSpecifiedSchema,
       partitionColumns,
       provider,
@@ -375,7 +375,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
   }
 
   def hiveDefaultTableFilePath(tableName: String): String = {
-    hiveDefaultTableFilePath(new SqlParser().parseTableIdentifier(tableName))
+    hiveDefaultTableFilePath(SqlParser.parseTableIdentifier(tableName))
   }
 
   def hiveDefaultTableFilePath(tableIdent: TableIdentifier): String = {

From 2117eea71ece825fbc3797c8b38184ae221f5223 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sat, 19 Sep 2015 21:40:21 -0700
Subject: [PATCH 040/896] [SPARK-10710] Remove ability to disable spilling in
 core and SQL

It does not make much sense to set `spark.shuffle.spill` or `spark.sql.planner.externalSort` to false: I believe that these configurations were initially added as "escape hatches" to guard against bugs in the external operators, but these operators are now mature and well-tested. In addition, these configurations are not handled in a consistent way anymore: SQL's Tungsten codepath ignores these configurations and will continue to use spilling operators. Similarly, Spark Core's `tungsten-sort` shuffle manager does not respect `spark.shuffle.spill=false`.

This pull request removes these configurations, adds warnings at the appropriate places, and deletes a large amount of code which was only used in code paths that did not support spilling.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8831 from JoshRosen/remove-ability-to-disable-spilling.
---
 .../scala/org/apache/spark/Aggregator.scala   | 59 +++++--------------
 .../org/apache/spark/rdd/CoGroupedRDD.scala   | 40 ++++---------
 .../shuffle/hash/HashShuffleManager.scala     |  8 ++-
 .../shuffle/sort/SortShuffleManager.scala     | 10 +++-
 .../util/collection/ExternalSorter.scala      |  6 --
 .../spark/deploy/SparkSubmitSuite.scala       | 22 +++----
 docs/configuration.md                         | 14 +----
 docs/sql-programming-guide.md                 |  7 ---
 python/pyspark/rdd.py                         | 25 +++-----
 python/pyspark/shuffle.py                     | 30 ----------
 python/pyspark/tests.py                       | 13 +---
 .../scala/org/apache/spark/sql/SQLConf.scala  |  8 +--
 .../spark/sql/execution/SparkStrategies.scala |  2 -
 .../apache/spark/sql/execution/commands.scala |  9 +++
 .../org/apache/spark/sql/execution/sort.scala | 30 +---------
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 26 ++------
 .../execution/RowFormatConvertersSuite.scala  |  2 +-
 .../spark/sql/execution/SortSuite.scala       |  4 +-
 18 files changed, 81 insertions(+), 234 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/Aggregator.scala b/core/src/main/scala/org/apache/spark/Aggregator.scala
index 289aab9bd9e5..7196e57d5d2e 100644
--- a/core/src/main/scala/org/apache/spark/Aggregator.scala
+++ b/core/src/main/scala/org/apache/spark/Aggregator.scala
@@ -18,7 +18,7 @@
 package org.apache.spark
 
 import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.util.collection.{AppendOnlyMap, ExternalAppendOnlyMap}
+import org.apache.spark.util.collection.ExternalAppendOnlyMap
 
 /**
  * :: DeveloperApi ::
@@ -34,59 +34,30 @@ case class Aggregator[K, V, C] (
     mergeValue: (C, V) => C,
     mergeCombiners: (C, C) => C) {
 
-  // When spilling is enabled sorting will happen externally, but not necessarily with an
-  // ExternalSorter.
-  private val isSpillEnabled = SparkEnv.get.conf.getBoolean("spark.shuffle.spill", true)
-
   @deprecated("use combineValuesByKey with TaskContext argument", "0.9.0")
   def combineValuesByKey(iter: Iterator[_ <: Product2[K, V]]): Iterator[(K, C)] =
     combineValuesByKey(iter, null)
 
-  def combineValuesByKey(iter: Iterator[_ <: Product2[K, V]],
-                         context: TaskContext): Iterator[(K, C)] = {
-    if (!isSpillEnabled) {
-      val combiners = new AppendOnlyMap[K, C]
-      var kv: Product2[K, V] = null
-      val update = (hadValue: Boolean, oldValue: C) => {
-        if (hadValue) mergeValue(oldValue, kv._2) else createCombiner(kv._2)
-      }
-      while (iter.hasNext) {
-        kv = iter.next()
-        combiners.changeValue(kv._1, update)
-      }
-      combiners.iterator
-    } else {
-      val combiners = new ExternalAppendOnlyMap[K, V, C](createCombiner, mergeValue, mergeCombiners)
-      combiners.insertAll(iter)
-      updateMetrics(context, combiners)
-      combiners.iterator
-    }
+  def combineValuesByKey(
+      iter: Iterator[_ <: Product2[K, V]],
+      context: TaskContext): Iterator[(K, C)] = {
+    val combiners = new ExternalAppendOnlyMap[K, V, C](createCombiner, mergeValue, mergeCombiners)
+    combiners.insertAll(iter)
+    updateMetrics(context, combiners)
+    combiners.iterator
   }
 
   @deprecated("use combineCombinersByKey with TaskContext argument", "0.9.0")
   def combineCombinersByKey(iter: Iterator[_ <: Product2[K, C]]) : Iterator[(K, C)] =
     combineCombinersByKey(iter, null)
 
-  def combineCombinersByKey(iter: Iterator[_ <: Product2[K, C]], context: TaskContext)
-    : Iterator[(K, C)] =
-  {
-    if (!isSpillEnabled) {
-      val combiners = new AppendOnlyMap[K, C]
-      var kc: Product2[K, C] = null
-      val update = (hadValue: Boolean, oldValue: C) => {
-        if (hadValue) mergeCombiners(oldValue, kc._2) else kc._2
-      }
-      while (iter.hasNext) {
-        kc = iter.next()
-        combiners.changeValue(kc._1, update)
-      }
-      combiners.iterator
-    } else {
-      val combiners = new ExternalAppendOnlyMap[K, C, C](identity, mergeCombiners, mergeCombiners)
-      combiners.insertAll(iter)
-      updateMetrics(context, combiners)
-      combiners.iterator
-    }
+  def combineCombinersByKey(
+      iter: Iterator[_ <: Product2[K, C]],
+      context: TaskContext): Iterator[(K, C)] = {
+    val combiners = new ExternalAppendOnlyMap[K, C, C](identity, mergeCombiners, mergeCombiners)
+    combiners.insertAll(iter)
+    updateMetrics(context, combiners)
+    combiners.iterator
   }
 
   /** Update task metrics after populating the external map. */
diff --git a/core/src/main/scala/org/apache/spark/rdd/CoGroupedRDD.scala b/core/src/main/scala/org/apache/spark/rdd/CoGroupedRDD.scala
index 7bad749d5832..935c3babd8ea 100644
--- a/core/src/main/scala/org/apache/spark/rdd/CoGroupedRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/CoGroupedRDD.scala
@@ -26,7 +26,7 @@ import scala.reflect.ClassTag
 
 import org.apache.spark._
 import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.util.collection.{ExternalAppendOnlyMap, AppendOnlyMap, CompactBuffer}
+import org.apache.spark.util.collection.{CompactBuffer, ExternalAppendOnlyMap}
 import org.apache.spark.util.Utils
 import org.apache.spark.serializer.Serializer
 
@@ -128,8 +128,6 @@ class CoGroupedRDD[K: ClassTag](
   override val partitioner: Some[Partitioner] = Some(part)
 
   override def compute(s: Partition, context: TaskContext): Iterator[(K, Array[Iterable[_]])] = {
-    val sparkConf = SparkEnv.get.conf
-    val externalSorting = sparkConf.getBoolean("spark.shuffle.spill", true)
     val split = s.asInstanceOf[CoGroupPartition]
     val numRdds = dependencies.length
 
@@ -150,34 +148,16 @@ class CoGroupedRDD[K: ClassTag](
         rddIterators += ((it, depNum))
     }
 
-    if (!externalSorting) {
-      val map = new AppendOnlyMap[K, CoGroupCombiner]
-      val update: (Boolean, CoGroupCombiner) => CoGroupCombiner = (hadVal, oldVal) => {
-        if (hadVal) oldVal else Array.fill(numRdds)(new CoGroup)
-      }
-      val getCombiner: K => CoGroupCombiner = key => {
-        map.changeValue(key, update)
-      }
-      rddIterators.foreach { case (it, depNum) =>
-        while (it.hasNext) {
-          val kv = it.next()
-          getCombiner(kv._1)(depNum) += kv._2
-        }
-      }
-      new InterruptibleIterator(context,
-        map.iterator.asInstanceOf[Iterator[(K, Array[Iterable[_]])]])
-    } else {
-      val map = createExternalMap(numRdds)
-      for ((it, depNum) <- rddIterators) {
-        map.insertAll(it.map(pair => (pair._1, new CoGroupValue(pair._2, depNum))))
-      }
-      context.taskMetrics().incMemoryBytesSpilled(map.memoryBytesSpilled)
-      context.taskMetrics().incDiskBytesSpilled(map.diskBytesSpilled)
-      context.internalMetricsToAccumulators(
-        InternalAccumulator.PEAK_EXECUTION_MEMORY).add(map.peakMemoryUsedBytes)
-      new InterruptibleIterator(context,
-        map.iterator.asInstanceOf[Iterator[(K, Array[Iterable[_]])]])
+    val map = createExternalMap(numRdds)
+    for ((it, depNum) <- rddIterators) {
+      map.insertAll(it.map(pair => (pair._1, new CoGroupValue(pair._2, depNum))))
     }
+    context.taskMetrics().incMemoryBytesSpilled(map.memoryBytesSpilled)
+    context.taskMetrics().incDiskBytesSpilled(map.diskBytesSpilled)
+    context.internalMetricsToAccumulators(
+      InternalAccumulator.PEAK_EXECUTION_MEMORY).add(map.peakMemoryUsedBytes)
+    new InterruptibleIterator(context,
+      map.iterator.asInstanceOf[Iterator[(K, Array[Iterable[_]])]])
   }
 
   private def createExternalMap(numRdds: Int)
diff --git a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
index c089088f409d..0b46634b8b46 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
@@ -24,7 +24,13 @@ import org.apache.spark.shuffle._
  * A ShuffleManager using hashing, that creates one output file per reduce partition on each
  * mapper (possibly reusing these across waves of tasks).
  */
-private[spark] class HashShuffleManager(conf: SparkConf) extends ShuffleManager {
+private[spark] class HashShuffleManager(conf: SparkConf) extends ShuffleManager with Logging {
+
+  if (!conf.getBoolean("spark.shuffle.spill", true)) {
+    logWarning(
+      "spark.shuffle.spill was set to false, but this configuration is ignored as of Spark 1.6+." +
+        " Shuffle will continue to spill to disk when necessary.")
+  }
 
   private val fileShuffleBlockResolver = new FileShuffleBlockResolver(conf)
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
index d7fab351ca3b..476cc1f303da 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
@@ -19,11 +19,17 @@ package org.apache.spark.shuffle.sort
 
 import java.util.concurrent.ConcurrentHashMap
 
-import org.apache.spark.{SparkConf, TaskContext, ShuffleDependency}
+import org.apache.spark.{Logging, SparkConf, TaskContext, ShuffleDependency}
 import org.apache.spark.shuffle._
 import org.apache.spark.shuffle.hash.HashShuffleReader
 
-private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager {
+private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager with Logging {
+
+  if (!conf.getBoolean("spark.shuffle.spill", true)) {
+    logWarning(
+      "spark.shuffle.spill was set to false, but this configuration is ignored as of Spark 1.6+." +
+        " Shuffle will continue to spill to disk when necessary.")
+  }
 
   private val indexShuffleBlockResolver = new IndexShuffleBlockResolver(conf)
   private val shuffleMapNumber = new ConcurrentHashMap[Int, Int]()
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index 31230d5978b2..2a30f751ff03 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -116,8 +116,6 @@ private[spark] class ExternalSorter[K, V, C](
   private val ser = Serializer.getSerializer(serializer)
   private val serInstance = ser.newInstance()
 
-  private val spillingEnabled = conf.getBoolean("spark.shuffle.spill", true)
-
   // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
   private val fileBufferSize = conf.getSizeAsKb("spark.shuffle.file.buffer", "32k").toInt * 1024
 
@@ -229,10 +227,6 @@ private[spark] class ExternalSorter[K, V, C](
    * @param usingMap whether we're using a map or buffer as our current in-memory collection
    */
   private def maybeSpillCollection(usingMap: Boolean): Unit = {
-    if (!spillingEnabled) {
-      return
-    }
-
     var estimatedSize = 0L
     if (usingMap) {
       estimatedSize = map.estimateSize()
diff --git a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
index 1110ca6051a4..1fd470cd3b01 100644
--- a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
@@ -147,7 +147,7 @@ class SparkSubmitSuite
       "--archives", "archive1.txt,archive2.txt",
       "--num-executors", "6",
       "--name", "beauty",
-      "--conf", "spark.shuffle.spill=false",
+      "--conf", "spark.ui.enabled=false",
       "thejar.jar",
       "arg1", "arg2")
     val appArgs = new SparkSubmitArguments(clArgs)
@@ -166,7 +166,7 @@ class SparkSubmitSuite
     mainClass should be ("org.apache.spark.deploy.yarn.Client")
     classpath should have length (0)
     sysProps("spark.app.name") should be ("beauty")
-    sysProps("spark.shuffle.spill") should be ("false")
+    sysProps("spark.ui.enabled") should be ("false")
     sysProps("SPARK_SUBMIT") should be ("true")
     sysProps.keys should not contain ("spark.jars")
   }
@@ -185,7 +185,7 @@ class SparkSubmitSuite
       "--archives", "archive1.txt,archive2.txt",
       "--num-executors", "6",
       "--name", "trill",
-      "--conf", "spark.shuffle.spill=false",
+      "--conf", "spark.ui.enabled=false",
       "thejar.jar",
       "arg1", "arg2")
     val appArgs = new SparkSubmitArguments(clArgs)
@@ -206,7 +206,7 @@ class SparkSubmitSuite
     sysProps("spark.yarn.dist.archives") should include regex (".*archive1.txt,.*archive2.txt")
     sysProps("spark.jars") should include regex (".*one.jar,.*two.jar,.*three.jar,.*thejar.jar")
     sysProps("SPARK_SUBMIT") should be ("true")
-    sysProps("spark.shuffle.spill") should be ("false")
+    sysProps("spark.ui.enabled") should be ("false")
   }
 
   test("handles standalone cluster mode") {
@@ -229,7 +229,7 @@ class SparkSubmitSuite
       "--supervise",
       "--driver-memory", "4g",
       "--driver-cores", "5",
-      "--conf", "spark.shuffle.spill=false",
+      "--conf", "spark.ui.enabled=false",
       "thejar.jar",
       "arg1", "arg2")
     val appArgs = new SparkSubmitArguments(clArgs)
@@ -253,9 +253,9 @@ class SparkSubmitSuite
     sysProps.keys should contain ("spark.driver.memory")
     sysProps.keys should contain ("spark.driver.cores")
     sysProps.keys should contain ("spark.driver.supervise")
-    sysProps.keys should contain ("spark.shuffle.spill")
+    sysProps.keys should contain ("spark.ui.enabled")
     sysProps.keys should contain ("spark.submit.deployMode")
-    sysProps("spark.shuffle.spill") should be ("false")
+    sysProps("spark.ui.enabled") should be ("false")
   }
 
   test("handles standalone client mode") {
@@ -266,7 +266,7 @@ class SparkSubmitSuite
       "--total-executor-cores", "5",
       "--class", "org.SomeClass",
       "--driver-memory", "4g",
-      "--conf", "spark.shuffle.spill=false",
+      "--conf", "spark.ui.enabled=false",
       "thejar.jar",
       "arg1", "arg2")
     val appArgs = new SparkSubmitArguments(clArgs)
@@ -277,7 +277,7 @@ class SparkSubmitSuite
     classpath(0) should endWith ("thejar.jar")
     sysProps("spark.executor.memory") should be ("5g")
     sysProps("spark.cores.max") should be ("5")
-    sysProps("spark.shuffle.spill") should be ("false")
+    sysProps("spark.ui.enabled") should be ("false")
   }
 
   test("handles mesos client mode") {
@@ -288,7 +288,7 @@ class SparkSubmitSuite
       "--total-executor-cores", "5",
       "--class", "org.SomeClass",
       "--driver-memory", "4g",
-      "--conf", "spark.shuffle.spill=false",
+      "--conf", "spark.ui.enabled=false",
       "thejar.jar",
       "arg1", "arg2")
     val appArgs = new SparkSubmitArguments(clArgs)
@@ -299,7 +299,7 @@ class SparkSubmitSuite
     classpath(0) should endWith ("thejar.jar")
     sysProps("spark.executor.memory") should be ("5g")
     sysProps("spark.cores.max") should be ("5")
-    sysProps("spark.shuffle.spill") should be ("false")
+    sysProps("spark.ui.enabled") should be ("false")
   }
 
   test("handles confs with flag equivalents") {
diff --git a/docs/configuration.md b/docs/configuration.md
index 3700051efb44..5ec097c78aa3 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -69,7 +69,7 @@ val sc = new SparkContext(new SparkConf())
 
 Then, you can supply configuration values at runtime:
 {% highlight bash %}
-./bin/spark-submit --name "My app" --master local[4] --conf spark.shuffle.spill=false
+./bin/spark-submit --name "My app" --master local[4] --conf spark.eventLog.enabled=false
   --conf "spark.executor.extraJavaOptions=-XX:+PrintGCDetails -XX:+PrintGCTimeStamps" myApp.jar
 {% endhighlight %}
 
@@ -449,8 +449,8 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.shuffle.memoryFraction</code></td>
   <td>0.2</td>
   <td>
-    Fraction of Java heap to use for aggregation and cogroups during shuffles, if
-    <code>spark.shuffle.spill</code> is true. At any given time, the collective size of
+    Fraction of Java heap to use for aggregation and cogroups during shuffles.
+    At any given time, the collective size of
     all in-memory maps used for shuffles is bounded by this limit, beyond which the contents will
     begin to spill to disk. If spills are often, consider increasing this value at the expense of
     <code>spark.storage.memoryFraction</code>.
@@ -483,14 +483,6 @@ Apart from these, the following properties are also available, and may be useful
     map-side aggregation and there are at most this many reduce partitions.
   </td>
 </tr>
-<tr>
-  <td><code>spark.shuffle.spill</code></td>
-  <td>true</td>
-  <td>
-    If set to "true", limits the amount of memory used during reduces by spilling data out to disk.
-    This spilling threshold is specified by <code>spark.shuffle.memoryFraction</code>.
-  </td>
-</tr>
 <tr>
   <td><code>spark.shuffle.spill.compress</code></td>
   <td>true</td>
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 82d4243cc6b2..7ae9244c271e 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1936,13 +1936,6 @@ that these options will be deprecated in future release as more optimizations ar
       Configures the number of partitions to use when shuffling data for joins or aggregations.
     </td>
   </tr>
-  <tr>
-    <td><code>spark.sql.planner.externalSort</code></td>
-    <td>true</td>
-    <td>
-      When true, performs sorts spilling to disk as needed otherwise sort each partition in memory.
-    </td>
-  </tr>
 </table>
 
 # Distributed SQL Engine
diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index ab5aab1e115f..73d7d9a5692a 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -48,7 +48,7 @@
 from pyspark.rddsampler import RDDSampler, RDDRangeSampler, RDDStratifiedSampler
 from pyspark.storagelevel import StorageLevel
 from pyspark.resultiterable import ResultIterable
-from pyspark.shuffle import Aggregator, InMemoryMerger, ExternalMerger, \
+from pyspark.shuffle import Aggregator, ExternalMerger, \
     get_used_memory, ExternalSorter, ExternalGroupBy
 from pyspark.traceback_utils import SCCallSiteSync
 
@@ -580,12 +580,11 @@ def repartitionAndSortWithinPartitions(self, numPartitions=None, partitionFunc=p
         if numPartitions is None:
             numPartitions = self._defaultReducePartitions()
 
-        spill = (self.ctx._conf.get("spark.shuffle.spill", 'True').lower() == "true")
         memory = _parse_memory(self.ctx._conf.get("spark.python.worker.memory", "512m"))
         serializer = self._jrdd_deserializer
 
         def sortPartition(iterator):
-            sort = ExternalSorter(memory * 0.9, serializer).sorted if spill else sorted
+            sort = ExternalSorter(memory * 0.9, serializer).sorted
             return iter(sort(iterator, key=lambda k_v: keyfunc(k_v[0]), reverse=(not ascending)))
 
         return self.partitionBy(numPartitions, partitionFunc).mapPartitions(sortPartition, True)
@@ -610,12 +609,11 @@ def sortByKey(self, ascending=True, numPartitions=None, keyfunc=lambda x: x):
         if numPartitions is None:
             numPartitions = self._defaultReducePartitions()
 
-        spill = self._can_spill()
         memory = self._memory_limit()
         serializer = self._jrdd_deserializer
 
         def sortPartition(iterator):
-            sort = ExternalSorter(memory * 0.9, serializer).sorted if spill else sorted
+            sort = ExternalSorter(memory * 0.9, serializer).sorted
             return iter(sort(iterator, key=lambda kv: keyfunc(kv[0]), reverse=(not ascending)))
 
         if numPartitions == 1:
@@ -1770,13 +1768,11 @@ def combineByKey(self, createCombiner, mergeValue, mergeCombiners,
             numPartitions = self._defaultReducePartitions()
 
         serializer = self.ctx.serializer
-        spill = self._can_spill()
         memory = self._memory_limit()
         agg = Aggregator(createCombiner, mergeValue, mergeCombiners)
 
         def combineLocally(iterator):
-            merger = ExternalMerger(agg, memory * 0.9, serializer) \
-                if spill else InMemoryMerger(agg)
+            merger = ExternalMerger(agg, memory * 0.9, serializer)
             merger.mergeValues(iterator)
             return merger.items()
 
@@ -1784,8 +1780,7 @@ def combineLocally(iterator):
         shuffled = locally_combined.partitionBy(numPartitions)
 
         def _mergeCombiners(iterator):
-            merger = ExternalMerger(agg, memory, serializer) \
-                if spill else InMemoryMerger(agg)
+            merger = ExternalMerger(agg, memory, serializer)
             merger.mergeCombiners(iterator)
             return merger.items()
 
@@ -1824,9 +1819,6 @@ def createZero():
 
         return self.combineByKey(lambda v: func(createZero(), v), func, func, numPartitions)
 
-    def _can_spill(self):
-        return self.ctx._conf.get("spark.shuffle.spill", "True").lower() == "true"
-
     def _memory_limit(self):
         return _parse_memory(self.ctx._conf.get("spark.python.worker.memory", "512m"))
 
@@ -1857,14 +1849,12 @@ def mergeCombiners(a, b):
             a.extend(b)
             return a
 
-        spill = self._can_spill()
         memory = self._memory_limit()
         serializer = self._jrdd_deserializer
         agg = Aggregator(createCombiner, mergeValue, mergeCombiners)
 
         def combine(iterator):
-            merger = ExternalMerger(agg, memory * 0.9, serializer) \
-                if spill else InMemoryMerger(agg)
+            merger = ExternalMerger(agg, memory * 0.9, serializer)
             merger.mergeValues(iterator)
             return merger.items()
 
@@ -1872,8 +1862,7 @@ def combine(iterator):
         shuffled = locally_combined.partitionBy(numPartitions)
 
         def groupByKey(it):
-            merger = ExternalGroupBy(agg, memory, serializer)\
-                if spill else InMemoryMerger(agg)
+            merger = ExternalGroupBy(agg, memory, serializer)
             merger.mergeCombiners(it)
             return merger.items()
 
diff --git a/python/pyspark/shuffle.py b/python/pyspark/shuffle.py
index b8118bdb7ca7..e974cda9fc3e 100644
--- a/python/pyspark/shuffle.py
+++ b/python/pyspark/shuffle.py
@@ -131,36 +131,6 @@ def items(self):
         raise NotImplementedError
 
 
-class InMemoryMerger(Merger):
-
-    """
-    In memory merger based on in-memory dict.
-    """
-
-    def __init__(self, aggregator):
-        Merger.__init__(self, aggregator)
-        self.data = {}
-
-    def mergeValues(self, iterator):
-        """ Combine the items by creator and combiner """
-        # speed up attributes lookup
-        d, creator = self.data, self.agg.createCombiner
-        comb = self.agg.mergeValue
-        for k, v in iterator:
-            d[k] = comb(d[k], v) if k in d else creator(v)
-
-    def mergeCombiners(self, iterator):
-        """ Merge the combined items by mergeCombiner """
-        # speed up attributes lookup
-        d, comb = self.data, self.agg.mergeCombiners
-        for k, v in iterator:
-            d[k] = comb(d[k], v) if k in d else v
-
-    def items(self):
-        """ Return the merged items ad iterator """
-        return iter(self.data.items())
-
-
 def _compressed_serializer(self, serializer=None):
     # always use PickleSerializer to simplify implementation
     ser = PickleSerializer()
diff --git a/python/pyspark/tests.py b/python/pyspark/tests.py
index 647504c32f15..f11aaf001c8d 100644
--- a/python/pyspark/tests.py
+++ b/python/pyspark/tests.py
@@ -62,7 +62,7 @@
     CloudPickleSerializer, CompressedSerializer, UTF8Deserializer, NoOpSerializer, \
     PairDeserializer, CartesianDeserializer, AutoBatchedSerializer, AutoSerializer, \
     FlattenedValuesSerializer
-from pyspark.shuffle import Aggregator, InMemoryMerger, ExternalMerger, ExternalSorter
+from pyspark.shuffle import Aggregator, ExternalMerger, ExternalSorter
 from pyspark import shuffle
 from pyspark.profiler import BasicProfiler
 
@@ -95,17 +95,6 @@ def setUp(self):
                               lambda x, y: x.append(y) or x,
                               lambda x, y: x.extend(y) or x)
 
-    def test_in_memory(self):
-        m = InMemoryMerger(self.agg)
-        m.mergeValues(self.data)
-        self.assertEqual(sum(sum(v) for k, v in m.items()),
-                         sum(xrange(self.N)))
-
-        m = InMemoryMerger(self.agg)
-        m.mergeCombiners(map(lambda x_y: (x_y[0], [x_y[1]]), self.data))
-        self.assertEqual(sum(sum(v) for k, v in m.items()),
-                         sum(xrange(self.N)))
-
     def test_small_dataset(self):
         m = ExternalMerger(self.agg, 1000)
         m.mergeValues(self.data)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 9de75f4c4d08..b9fb90d96420 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -330,11 +330,6 @@ private[spark] object SQLConf {
 
   // Options that control which operators can be chosen by the query planner.  These should be
   // considered hints and may be ignored by future versions of Spark SQL.
-  val EXTERNAL_SORT = booleanConf("spark.sql.planner.externalSort",
-    defaultValue = Some(true),
-    doc = "When true, performs sorts spilling to disk as needed otherwise sort each partition in" +
-      " memory.")
-
   val SORTMERGE_JOIN = booleanConf("spark.sql.planner.sortMergeJoin",
     defaultValue = Some(true),
     doc = "When true, use sort merge join (as opposed to hash join) by default for large joins.")
@@ -422,6 +417,7 @@ private[spark] object SQLConf {
 
   object Deprecated {
     val MAPRED_REDUCE_TASKS = "mapred.reduce.tasks"
+    val EXTERNAL_SORT = "spark.sql.planner.externalSort"
   }
 }
 
@@ -476,8 +472,6 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def metastorePartitionPruning: Boolean = getConf(HIVE_METASTORE_PARTITION_PRUNING)
 
-  private[spark] def externalSortEnabled: Boolean = getConf(EXTERNAL_SORT)
-
   private[spark] def sortMergeJoinEnabled: Boolean = getConf(SORTMERGE_JOIN)
 
   private[spark] def codegenEnabled: Boolean = getConf(CODEGEN_ENABLED, getConf(TUNGSTEN_ENABLED))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 5e40d7768904..41b215c79296 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -312,8 +312,6 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
       if (sqlContext.conf.unsafeEnabled && sqlContext.conf.codegenEnabled &&
         TungstenSort.supportsSchema(child.schema)) {
         execution.TungstenSort(sortExprs, global, child)
-      } else if (sqlContext.conf.externalSortEnabled) {
-        execution.ExternalSort(sortExprs, global, child)
       } else {
         execution.Sort(sortExprs, global, child)
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index 95209e663451..af28e2dfa418 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -105,6 +105,15 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
       }
       (keyValueOutput, runFunc)
 
+    case Some((SQLConf.Deprecated.EXTERNAL_SORT, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.EXTERNAL_SORT} is deprecated and will be ignored. " +
+            s"External sort will continue to be used.")
+        Seq(Row(SQLConf.Deprecated.EXTERNAL_SORT, "true"))
+      }
+      (keyValueOutput, runFunc)
+
     // Configures a single property.
     case Some((key, Some(value))) =>
       val runFunc = (sqlContext: SQLContext) => {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index 40ef7c3b5353..27f26245a5ef 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -31,38 +31,12 @@ import org.apache.spark.{SparkEnv, InternalAccumulator, TaskContext}
 // This file defines various sort operators.
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
-
-/**
- * Performs a sort on-heap.
- * @param global when true performs a global sort of all partitions by shuffling the data first
- *               if necessary.
- */
-case class Sort(
-    sortOrder: Seq[SortOrder],
-    global: Boolean,
-    child: SparkPlan)
-  extends UnaryNode {
-  override def requiredChildDistribution: Seq[Distribution] =
-    if (global) OrderedDistribution(sortOrder) :: Nil else UnspecifiedDistribution :: Nil
-
-  protected override def doExecute(): RDD[InternalRow] = attachTree(this, "sort") {
-    child.execute().mapPartitions( { iterator =>
-      val ordering = newOrdering(sortOrder, child.output)
-      iterator.map(_.copy()).toArray.sorted(ordering).iterator
-    }, preservesPartitioning = true)
-  }
-
-  override def output: Seq[Attribute] = child.output
-
-  override def outputOrdering: Seq[SortOrder] = sortOrder
-}
-
 /**
  * Performs a sort, spilling to disk as needed.
  * @param global when true performs a global sort of all partitions by shuffling the data first
  *               if necessary.
  */
-case class ExternalSort(
+case class Sort(
     sortOrder: Seq[SortOrder],
     global: Boolean,
     child: SparkPlan)
@@ -93,7 +67,7 @@ case class ExternalSort(
 }
 
 /**
- * Optimized version of [[ExternalSort]] that operates on binary data (implemented as part of
+ * Optimized version of [[Sort]] that operates on binary data (implemented as part of
  * Project Tungsten).
  *
  * @param global when true performs a global sort of all partitions by shuffling the data first
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index f9981356f364..05b4127cbcaf 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -581,28 +581,12 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       mapData.collect().sortBy(_.data(1)).reverse.map(Row.fromTuple).toSeq)
   }
 
-  test("sorting") {
-    withSQLConf(SQLConf.EXTERNAL_SORT.key -> "false") {
-      sortTest()
-    }
-  }
-
   test("external sorting") {
-    withSQLConf(SQLConf.EXTERNAL_SORT.key -> "true") {
-      sortTest()
-    }
-  }
-
-  test("SPARK-6927 sorting with codegen on") {
-    withSQLConf(SQLConf.EXTERNAL_SORT.key -> "false",
-      SQLConf.CODEGEN_ENABLED.key -> "true") {
-      sortTest()
-    }
+    sortTest()
   }
 
   test("SPARK-6927 external sorting with codegen on") {
-    withSQLConf(SQLConf.EXTERNAL_SORT.key -> "true",
-      SQLConf.CODEGEN_ENABLED.key -> "true") {
+    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
       sortTest()
     }
   }
@@ -1731,10 +1715,8 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   }
 
   test("external sorting updates peak execution memory") {
-    withSQLConf((SQLConf.EXTERNAL_SORT.key, "true")) {
-      AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "external sort") {
-        sortTest()
-      }
+    AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "external sort") {
+      sortTest()
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
index 4492e37ad01f..5dc37e5c3c23 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
@@ -32,7 +32,7 @@ class RowFormatConvertersSuite extends SparkPlanTest with SharedSQLContext {
     case c: ConvertToSafe => c
   }
 
-  private val outputsSafe = ExternalSort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
+  private val outputsSafe = Sort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
   assert(!outputsSafe.outputsUnsafeRows)
   private val outputsUnsafe = TungstenSort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
   assert(outputsUnsafe.outputsUnsafeRows)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
index 3073d492e613..847c188a3033 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
@@ -36,13 +36,13 @@ class SortSuite extends SparkPlanTest with SharedSQLContext {
 
     checkAnswer(
       input.toDF("a", "b", "c"),
-      ExternalSort('a.asc :: 'b.asc :: Nil, global = true, _: SparkPlan),
+      Sort('a.asc :: 'b.asc :: Nil, global = true, _: SparkPlan),
       input.sortBy(t => (t._1, t._2)).map(Row.fromTuple),
       sortAnswers = false)
 
     checkAnswer(
       input.toDF("a", "b", "c"),
-      ExternalSort('b.asc :: 'a.asc :: Nil, global = true, _: SparkPlan),
+      Sort('b.asc :: 'a.asc :: Nil, global = true, _: SparkPlan),
       input.sortBy(t => (t._2, t._1)).map(Row.fromTuple),
       sortAnswers = false)
   }

From 1aa9e50256988533fa54584b49dbc408a14438ee Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Sun, 20 Sep 2015 16:05:12 -0700
Subject: [PATCH 041/896] [SPARK-5905] [MLLIB] Note requirements for certain
 RowMatrix methods in docs

Note methods that fail for cols > 65535; note that SVD does not require n >= m
CC mengxr

Author: Sean Owen <sowen@cloudera.com>

Closes #8839 from srowen/SPARK-5905.
---
 .../spark/mllib/linalg/distributed/RowMatrix.scala    | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
index e55ef26858ad..7c7d900af3d5 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
@@ -109,7 +109,8 @@ class RowMatrix @Since("1.0.0") (
   }
 
   /**
-   * Computes the Gramian matrix `A^T A`.
+   * Computes the Gramian matrix `A^T A`. Note that this cannot be computed on matrices with
+   * more than 65535 columns.
    */
   @Since("1.0.0")
   def computeGramianMatrix(): Matrix = {
@@ -150,7 +151,8 @@ class RowMatrix @Since("1.0.0") (
    *  - s is a Vector of size k, holding the singular values in descending order,
    *  - V is a Matrix of size n x k that satisfies V' * V = eye(k).
    *
-   * We assume n is smaller than m. The singular values and the right singular vectors are derived
+   * We assume n is smaller than m, though this is not strictly required.
+   * The singular values and the right singular vectors are derived
    * from the eigenvalues and the eigenvectors of the Gramian matrix A' * A. U, the matrix
    * storing the right singular vectors, is computed via matrix multiplication as
    * U = A * (V * S^-1^), if requested by user. The actual method to use is determined
@@ -320,7 +322,8 @@ class RowMatrix @Since("1.0.0") (
   }
 
   /**
-   * Computes the covariance matrix, treating each row as an observation.
+   * Computes the covariance matrix, treating each row as an observation. Note that this cannot
+   * be computed on matrices with more than 65535 columns.
    * @return a local dense matrix of size n x n
    */
   @Since("1.0.0")
@@ -374,6 +377,8 @@ class RowMatrix @Since("1.0.0") (
    * The row data do not need to be "centered" first; it is not necessary for
    * the mean of each column to be 0.
    *
+   * Note that this cannot be computed on matrices with more than 65535 columns.
+   *
    * @param k number of top principal components.
    * @return a matrix of size n-by-k, whose columns are principal components
    */

From 0c498717ba9622b6c889e701e8eed5ef9215c030 Mon Sep 17 00:00:00 2001
From: lewuathe <lewuathe@me.com>
Date: Sun, 20 Sep 2015 16:16:31 -0700
Subject: [PATCH 042/896] [SPARK-10715] [ML] Duplicate initialization flag in
 WeightedLeastSquare

There are duplicate set of initialization flag in `WeightedLeastSquares#add`.
`initialized` is already set in `init(Int)`.

Author: lewuathe <lewuathe@me.com>

Closes #8837 from Lewuathe/duplicate-initialization-flag.
---
 .../scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala   | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
index 0ff8931b0bab..4374e9963156 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
@@ -193,7 +193,6 @@ private[ml] object WeightedLeastSquares {
       val ak = a.size
       if (!initialized) {
         init(ak)
-        initialized = true
       }
       assert(ak == k, s"Dimension mismatch. Expect vectors of size $k but got $ak.")
       count += 1L

From 01440395176bdbb2662480f03b27851cb860f385 Mon Sep 17 00:00:00 2001
From: vinodkc <vinod.kc.in@gmail.com>
Date: Sun, 20 Sep 2015 22:55:24 -0700
Subject: [PATCH 043/896] [SPARK-10631] [DOCUMENTATION, MLLIB, PYSPARK] Added
 documentation for few APIs

There are some missing API docs in pyspark.mllib.linalg.Vector (including DenseVector and SparseVector). We should add them based on their Scala counterparts.

Author: vinodkc <vinod.kc.in@gmail.com>

Closes #8834 from vinodkc/fix_SPARK-10631.
---
 python/pyspark/mllib/linalg/__init__.py | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index 4829acb16ed8..f929e3e96fbe 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -301,11 +301,14 @@ def __reduce__(self):
         return DenseVector, (self.array.tostring(),)
 
     def numNonzeros(self):
+        """
+        Number of nonzero elements. This scans all active values and count non zeros
+        """
         return np.count_nonzero(self.array)
 
     def norm(self, p):
         """
-        Calculte the norm of a DenseVector.
+        Calculates the norm of a DenseVector.
 
         >>> a = DenseVector([0, -1, 2, -3])
         >>> a.norm(2)
@@ -397,10 +400,16 @@ def squared_distance(self, other):
         return np.dot(diff, diff)
 
     def toArray(self):
+        """
+        Returns an numpy.ndarray
+        """
         return self.array
 
     @property
     def values(self):
+        """
+        Returns a list of values
+        """
         return self.array
 
     def __getitem__(self, item):
@@ -479,8 +488,8 @@ def __init__(self, size, *args):
 
         :param size: Size of the vector.
         :param args: Active entries, as a dictionary {index: value, ...},
-          a list of tuples [(index, value), ...], or a list of strictly i
-          ncreasing indices and a list of corresponding values [index, ...],
+          a list of tuples [(index, value), ...], or a list of strictly
+          increasing indices and a list of corresponding values [index, ...],
           [value, ...]. Inactive entries are treated as zeros.
 
         >>> SparseVector(4, {1: 1.0, 3: 5.5})
@@ -521,11 +530,14 @@ def __init__(self, size, *args):
                     raise TypeError("indices array must be sorted")
 
     def numNonzeros(self):
+        """
+        Number of nonzero elements. This scans all active values and count non zeros.
+        """
         return np.count_nonzero(self.values)
 
     def norm(self, p):
         """
-        Calculte the norm of a SparseVector.
+        Calculates the norm of a SparseVector.
 
         >>> a = SparseVector(4, [0, 1], [3., -4.])
         >>> a.norm(1)
@@ -797,7 +809,7 @@ def sparse(size, *args):
         values (sorted by index).
 
         :param size: Size of the vector.
-        :param args: Non-zero entries, as a dictionary, list of tupes,
+        :param args: Non-zero entries, as a dictionary, list of tuples,
                      or two sorted lists containing indices and values.
 
         >>> Vectors.sparse(4, {1: 1.0, 3: 5.5})

From 20a61dbd9b57957fcc5b58ef8935533914172b07 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Mon, 21 Sep 2015 18:53:28 +0100
Subject: [PATCH 044/896] [SPARK-10626] [MLLIB] create java friendly method for
 random rdd

SPARK-3136 added a large number of functions for creating Java RandomRDDs, but for people that want to use custom RandomDataGenerators we should make a Java friendly method.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8782 from holdenk/SPARK-10626-create-java-friendly-method-for-randomRDD.
---
 .../spark/mllib/random/RandomRDDs.scala       | 52 ++++++++++++++++++-
 .../mllib/random/JavaRandomRDDsSuite.java     | 30 +++++++++++
 2 files changed, 81 insertions(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
index 4dd5ea214d67..f8ff26b5795b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
@@ -22,6 +22,7 @@ import scala.reflect.ClassTag
 import org.apache.spark.SparkContext
 import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
 import org.apache.spark.api.java.{JavaDoubleRDD, JavaRDD, JavaSparkContext}
+import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.rdd.{RandomRDD, RandomVectorRDD}
 import org.apache.spark.rdd.RDD
@@ -381,7 +382,7 @@ object RandomRDDs {
    * @param size Size of the RDD.
    * @param numPartitions Number of partitions in the RDD (default: `sc.defaultParallelism`).
    * @param seed Random seed (default: a random long integer).
-   * @return RDD[Double] comprised of `i.i.d.` samples produced by generator.
+   * @return RDD[T] comprised of `i.i.d.` samples produced by generator.
    */
   @DeveloperApi
   @Since("1.1.0")
@@ -394,6 +395,55 @@ object RandomRDDs {
     new RandomRDD[T](sc, size, numPartitionsOrDefault(sc, numPartitions), generator, seed)
   }
 
+  /**
+   * :: DeveloperApi ::
+   * Generates an RDD comprised of `i.i.d.` samples produced by the input RandomDataGenerator.
+   *
+   * @param jsc JavaSparkContext used to create the RDD.
+   * @param generator RandomDataGenerator used to populate the RDD.
+   * @param size Size of the RDD.
+   * @param numPartitions Number of partitions in the RDD (default: `sc.defaultParallelism`).
+   * @param seed Random seed (default: a random long integer).
+   * @return RDD[T] comprised of `i.i.d.` samples produced by generator.
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaRDD[T](
+      jsc: JavaSparkContext,
+      generator: RandomDataGenerator[T],
+      size: Long,
+      numPartitions: Int,
+      seed: Long): JavaRDD[T] = {
+    implicit val ctag: ClassTag[T] = fakeClassTag
+    val rdd = randomRDD(jsc.sc, generator, size, numPartitions, seed)
+    JavaRDD.fromRDD(rdd)
+  }
+
+  /**
+   * [[RandomRDDs#randomJavaRDD]] with the default seed.
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaRDD[T](
+    jsc: JavaSparkContext,
+    generator: RandomDataGenerator[T],
+    size: Long,
+    numPartitions: Int): JavaRDD[T] = {
+    randomJavaRDD(jsc, generator, size, numPartitions, Utils.random.nextLong())
+  }
+
+  /**
+   * [[RandomRDDs#randomJavaRDD]] with the default seed & numPartitions
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaRDD[T](
+    jsc: JavaSparkContext,
+    generator: RandomDataGenerator[T],
+    size: Long): JavaRDD[T] = {
+    randomJavaRDD(jsc, generator, size, 0);
+  }
+
   // TODO Generate RDD[Vector] from multivariate distributions.
 
   /**
diff --git a/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java b/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
index 33d81b1e9592..fce5f6712f46 100644
--- a/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
+++ b/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
@@ -17,6 +17,7 @@
 
 package org.apache.spark.mllib.random;
 
+import java.io.Serializable;
 import java.util.Arrays;
 
 import org.apache.spark.api.java.JavaRDD;
@@ -231,4 +232,33 @@ public void testGammaVectorRDD() {
     }
   }
 
+  @Test
+  public void testArbitrary() {
+    long size = 10;
+    long seed = 1L;
+    int numPartitions = 0;
+    StringGenerator gen = new StringGenerator();
+    JavaRDD<String> rdd1 = randomJavaRDD(sc, gen, size);
+    JavaRDD<String> rdd2 = randomJavaRDD(sc, gen, size, numPartitions);
+    JavaRDD<String> rdd3 = randomJavaRDD(sc, gen, size, numPartitions, seed);
+    for (JavaRDD<String> rdd: Arrays.asList(rdd1, rdd2, rdd3)) {
+      Assert.assertEquals(size, rdd.count());
+      Assert.assertEquals(2, rdd.first().length());
+    }
+  }
+}
+
+// This is just a test generator, it always returns a string of 42
+class StringGenerator implements RandomDataGenerator<String>, Serializable {
+  @Override
+  public String nextValue() {
+    return "42";
+  }
+  @Override
+  public StringGenerator copy() {
+    return new StringGenerator();
+  }
+  @Override
+  public void setSeed(long seed) {
+  }
 }

From ebbf85f07bb8de0d566f1ae4b41f26421180bebe Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Mon, 21 Sep 2015 11:39:04 -0700
Subject: [PATCH 045/896] [SPARK-7989] [SPARK-10651] [CORE] [TESTS] Increase
 timeout to fix flaky tests

I noticed only one block manager registered with master in an unsuccessful build (https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-SBT/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.2,label=spark-test/3534/)
```
15/09/16 13:02:30.981 pool-1-thread-1-ScalaTest-running-BroadcastSuite INFO SparkContext: Running Spark version 1.6.0-SNAPSHOT
...
15/09/16 13:02:38.133 sparkDriver-akka.actor.default-dispatcher-19 INFO BlockManagerMasterEndpoint: Registering block manager localhost:48196 with 530.3 MB RAM, BlockManagerId(0, localhost, 48196)
```
In addition, the first block manager needed 7+ seconds to start. But the test expected 2 block managers so it failed.

However, there was no exception in this log file. So I checked a successful build (https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-SBT/3536/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.2,label=spark-test/) and it needed 4-5 seconds to set up the local cluster:
```
15/09/16 18:11:27.738 sparkWorker1-akka.actor.default-dispatcher-5 INFO Worker: Running Spark version 1.6.0-SNAPSHOT
...
15/09/16 18:11:30.838 sparkDriver-akka.actor.default-dispatcher-20 INFO BlockManagerMasterEndpoint: Registering block manager localhost:54202 with 530.3 MB RAM, BlockManagerId(1, localhost, 54202)
15/09/16 18:11:32.112 sparkDriver-akka.actor.default-dispatcher-20 INFO BlockManagerMasterEndpoint: Registering block manager localhost:32955 with 530.3 MB RAM, BlockManagerId(0, localhost, 32955)
```
In this build, the first block manager needed only 3+ seconds to start.

Comparing these two builds, I guess it's possible that the local cluster in `BroadcastSuite` cannot be ready in 10 seconds if the Jenkins worker is busy. So I just increased the timeout to 60 seconds to see if this can fix the issue.

Author: zsxwing <zsxwing@gmail.com>

Closes #8813 from zsxwing/fix-BroadcastSuite.
---
 .../scala/org/apache/spark/ExternalShuffleServiceSuite.scala    | 2 +-
 .../test/scala/org/apache/spark/broadcast/BroadcastSuite.scala  | 2 +-
 .../apache/spark/scheduler/SparkListenerWithClusterSuite.scala  | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala b/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
index e846a72c888c..231f4631e0a4 100644
--- a/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
@@ -61,7 +61,7 @@ class ExternalShuffleServiceSuite extends ShuffleSuite with BeforeAndAfterAll {
     // local blocks from the local BlockManager and won't send requests to ExternalShuffleService.
     // In this case, we won't receive FetchFailed. And it will make this test fail.
     // Therefore, we should wait until all slaves are up
-    sc.jobProgressListener.waitUntilExecutorsUp(2, 10000)
+    sc.jobProgressListener.waitUntilExecutorsUp(2, 60000)
 
     val rdd = sc.parallelize(0 until 1000, 10).map(i => (i, 1)).reduceByKey(_ + _)
 
diff --git a/core/src/test/scala/org/apache/spark/broadcast/BroadcastSuite.scala b/core/src/test/scala/org/apache/spark/broadcast/BroadcastSuite.scala
index fb7a8ae3f9d4..ba21075ce6be 100644
--- a/core/src/test/scala/org/apache/spark/broadcast/BroadcastSuite.scala
+++ b/core/src/test/scala/org/apache/spark/broadcast/BroadcastSuite.scala
@@ -311,7 +311,7 @@ class BroadcastSuite extends SparkFunSuite with LocalSparkContext {
         new SparkContext("local-cluster[%d, 1, 1024]".format(numSlaves), "test", broadcastConf)
       // Wait until all salves are up
       try {
-        _sc.jobProgressListener.waitUntilExecutorsUp(numSlaves, 10000)
+        _sc.jobProgressListener.waitUntilExecutorsUp(numSlaves, 60000)
         _sc
       } catch {
         case e: Throwable =>
diff --git a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerWithClusterSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerWithClusterSuite.scala
index d1e23ed527ff..9fa885938291 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerWithClusterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerWithClusterSuite.scala
@@ -43,7 +43,7 @@ class SparkListenerWithClusterSuite extends SparkFunSuite with LocalSparkContext
 
     // This test will check if the number of executors received by "SparkListener" is same as the
     // number of all executors, so we need to wait until all executors are up
-    sc.jobProgressListener.waitUntilExecutorsUp(2, 10000)
+    sc.jobProgressListener.waitUntilExecutorsUp(2, 60000)
 
     val rdd1 = sc.parallelize(1 to 100, 4)
     val rdd2 = rdd1.map(_.toString)

From ca9fe540fe04e2e230d1e76526b5502bab152914 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Mon, 21 Sep 2015 19:46:39 +0100
Subject: [PATCH 046/896] [SPARK-10662] [DOCS] Code snippets are not properly
 formatted in tables

* Backticks are processed properly in Spark Properties table
* Removed unnecessary spaces
* See http://people.apache.org/~pwendell/spark-nightly/spark-master-docs/latest/running-on-yarn.html

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #8795 from jaceklaskowski/docs-yarn-formatting.
---
 docs/configuration.md           |  97 +++++++++++++++--------------
 docs/programming-guide.md       | 100 +++++++++++++++---------------
 docs/running-on-mesos.md        |  14 ++---
 docs/running-on-yarn.md         | 106 ++++++++++++++++----------------
 docs/sql-programming-guide.md   |  16 ++---
 docs/submitting-applications.md |   8 +--
 6 files changed, 171 insertions(+), 170 deletions(-)

diff --git a/docs/configuration.md b/docs/configuration.md
index 5ec097c78aa3..b22587c70316 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -34,20 +34,20 @@ val conf = new SparkConf()
 val sc = new SparkContext(conf)
 {% endhighlight %}
 
-Note that we can have more than 1 thread in local mode, and in cases like Spark Streaming, we may 
+Note that we can have more than 1 thread in local mode, and in cases like Spark Streaming, we may
 actually require one to prevent any sort of starvation issues.
 
-Properties that specify some time duration should be configured with a unit of time. 
+Properties that specify some time duration should be configured with a unit of time.
 The following format is accepted:
- 
+
     25ms (milliseconds)
     5s (seconds)
     10m or 10min (minutes)
     3h (hours)
     5d (days)
     1y (years)
-    
-    
+
+
 Properties that specify a byte size should be configured with a unit of size.  
 The following format is accepted:
 
@@ -140,7 +140,7 @@ of the most common options to set are:
   <td>
     Amount of memory to use for the driver process, i.e. where SparkContext is initialized.
     (e.g. <code>1g</code>, <code>2g</code>).
-    
+
     <br /><em>Note:</em> In client mode, this config must not be set through the <code>SparkConf</code>
     directly in your application, because the driver JVM has already started at that point.
     Instead, please set this through the <code>--driver-memory</code> command line option
@@ -207,7 +207,7 @@ Apart from these, the following properties are also available, and may be useful
 
     <br /><em>Note:</em> In client mode, this config must not be set through the <code>SparkConf</code>
     directly in your application, because the driver JVM has already started at that point.
-    Instead, please set this through the <code>--driver-class-path</code> command line option or in 
+    Instead, please set this through the <code>--driver-class-path</code> command line option or in
     your default properties file.</td>
   </td>
 </tr>
@@ -216,10 +216,10 @@ Apart from these, the following properties are also available, and may be useful
   <td>(none)</td>
   <td>
     A string of extra JVM options to pass to the driver. For instance, GC settings or other logging.
-    
+
     <br /><em>Note:</em> In client mode, this config must not be set through the <code>SparkConf</code>
     directly in your application, because the driver JVM has already started at that point.
-    Instead, please set this through the <code>--driver-java-options</code> command line option or in 
+    Instead, please set this through the <code>--driver-java-options</code> command line option or in
     your default properties file.</td>
   </td>
 </tr>
@@ -228,10 +228,10 @@ Apart from these, the following properties are also available, and may be useful
   <td>(none)</td>
   <td>
     Set a special library path to use when launching the driver JVM.
-    
+
     <br /><em>Note:</em> In client mode, this config must not be set through the <code>SparkConf</code>
     directly in your application, because the driver JVM has already started at that point.
-    Instead, please set this through the <code>--driver-library-path</code> command line option or in 
+    Instead, please set this through the <code>--driver-library-path</code> command line option or in
     your default properties file.</td>
   </td>
 </tr>
@@ -242,7 +242,7 @@ Apart from these, the following properties are also available, and may be useful
     (Experimental) Whether to give user-added jars precedence over Spark's own jars when loading
     classes in the the driver. This feature can be used to mitigate conflicts between Spark's
     dependencies and user dependencies. It is currently an experimental feature.
-    
+
     This is used in cluster mode only.
   </td>
 </tr>
@@ -250,8 +250,8 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.executor.extraClassPath</code></td>
   <td>(none)</td>
   <td>
-    Extra classpath entries to prepend to the classpath of executors. This exists primarily for 
-    backwards-compatibility with older versions of Spark. Users typically should not need to set 
+    Extra classpath entries to prepend to the classpath of executors. This exists primarily for
+    backwards-compatibility with older versions of Spark. Users typically should not need to set
     this option.
   </td>
 </tr>
@@ -259,9 +259,9 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.executor.extraJavaOptions</code></td>
   <td>(none)</td>
   <td>
-    A string of extra JVM options to pass to executors. For instance, GC settings or other logging. 
-    Note that it is illegal to set Spark properties or heap size settings with this option. Spark 
-    properties should be set using a SparkConf object or the spark-defaults.conf file used with the 
+    A string of extra JVM options to pass to executors. For instance, GC settings or other logging.
+    Note that it is illegal to set Spark properties or heap size settings with this option. Spark
+    properties should be set using a SparkConf object or the spark-defaults.conf file used with the
     spark-submit script. Heap size settings can be set with spark.executor.memory.
   </td>
 </tr>
@@ -305,7 +305,7 @@ Apart from these, the following properties are also available, and may be useful
   <td>daily</td>
   <td>
     Set the time interval by which the executor logs will be rolled over.
-    Rolling is disabled by default. Valid values are `daily`, `hourly`, `minutely` or
+    Rolling is disabled by default. Valid values are <code>daily</code>, <code>hourly<code>, <code>minutely<code> or
     any interval in seconds. See <code>spark.executor.logs.rolling.maxRetainedFiles</code>
     for automatic cleaning of old logs.
   </td>
@@ -330,13 +330,13 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.python.profile</code></td>
   <td>false</td>
   <td>
-    Enable profiling in Python worker, the profile result will show up by `sc.show_profiles()`,
+    Enable profiling in Python worker, the profile result will show up by <code>sc.show_profiles()<code>,
     or it will be displayed before the driver exiting. It also can be dumped into disk by
-    `sc.dump_profiles(path)`. If some of the profile results had been displayed manually,
+    <code>sc.dump_profiles(path)<code>. If some of the profile results had been displayed manually,
     they will not be displayed automatically before driver exiting.
 
-    By default the `pyspark.profiler.BasicProfiler` will be used, but this can be overridden by
-    passing a profiler class in as a parameter to the `SparkContext` constructor.
+    By default the <code>pyspark.profiler.BasicProfiler<code> will be used, but this can be overridden by
+    passing a profiler class in as a parameter to the <code>SparkContext<code> constructor.
   </td>
 </tr>
 <tr>
@@ -460,11 +460,11 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.shuffle.service.enabled</code></td>
   <td>false</td>
   <td>
-    Enables the external shuffle service. This service preserves the shuffle files written by 
-    executors so the executors can be safely removed. This must be enabled if 
+    Enables the external shuffle service. This service preserves the shuffle files written by
+    executors so the executors can be safely removed. This must be enabled if
     <code>spark.dynamicAllocation.enabled</code> is "true". The external shuffle service
     must be set up in order to enable it. See
-    <a href="job-scheduling.html#configuration-and-setup">dynamic allocation 
+    <a href="job-scheduling.html#configuration-and-setup">dynamic allocation
     configuration and setup documentation</a> for more information.
   </td>
 </tr>
@@ -747,9 +747,9 @@ Apart from these, the following properties are also available, and may be useful
   <td>1 in YARN mode, all the available cores on the worker in standalone mode.</td>
   <td>
     The number of cores to use on each executor. For YARN and standalone mode only.
-    
-    In standalone mode, setting this parameter allows an application to run multiple executors on 
-    the same worker, provided that there are enough cores on that worker. Otherwise, only one 
+
+    In standalone mode, setting this parameter allows an application to run multiple executors on
+    the same worker, provided that there are enough cores on that worker. Otherwise, only one
     executor per application will run on each worker.
   </td>
 </tr>
@@ -893,14 +893,14 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.akka.heartbeat.interval</code></td>
   <td>1000s</td>
   <td>
-    This is set to a larger value to disable the transport failure detector that comes built in to 
-    Akka. It can be enabled again, if you plan to use this feature (Not recommended). A larger 
-    interval value reduces network overhead and a smaller value ( ~ 1 s) might be more 
-    informative for Akka's failure detector. Tune this in combination of `spark.akka.heartbeat.pauses` 
-    if you need to. A likely positive use case for using failure detector would be: a sensistive 
-    failure detector can help evict rogue executors quickly. However this is usually not the case 
-    as GC pauses and network lags are expected in a real Spark cluster. Apart from that enabling 
-    this leads to a lot of exchanges of heart beats between nodes leading to flooding the network 
+    This is set to a larger value to disable the transport failure detector that comes built in to
+    Akka. It can be enabled again, if you plan to use this feature (Not recommended). A larger
+    interval value reduces network overhead and a smaller value ( ~ 1 s) might be more
+    informative for Akka's failure detector. Tune this in combination of <code>spark.akka.heartbeat.pauses</code>
+    if you need to. A likely positive use case for using failure detector would be: a sensistive
+    failure detector can help evict rogue executors quickly. However this is usually not the case
+    as GC pauses and network lags are expected in a real Spark cluster. Apart from that enabling
+    this leads to a lot of exchanges of heart beats between nodes leading to flooding the network
     with those.
   </td>
 </tr>
@@ -909,9 +909,9 @@ Apart from these, the following properties are also available, and may be useful
   <td>6000s</td>
   <td>
      This is set to a larger value to disable the transport failure detector that comes built in to Akka.
-     It can be enabled again, if you plan to use this feature (Not recommended). Acceptable heart 
+     It can be enabled again, if you plan to use this feature (Not recommended). Acceptable heart
      beat pause for Akka. This can be used to control sensitivity to GC pauses. Tune
-     this along with `spark.akka.heartbeat.interval` if you need to.
+     this along with <code>spark.akka.heartbeat.interval</code> if you need to.
   </td>
 </tr>
 <tr>
@@ -978,7 +978,7 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.network.timeout</code></td>
   <td>120s</td>
   <td>
-    Default timeout for all network interactions. This config will be used in place of 
+    Default timeout for all network interactions. This config will be used in place of
     <code>spark.core.connection.ack.wait.timeout</code>, <code>spark.akka.timeout</code>,
     <code>spark.storage.blockManagerSlaveTimeoutMs</code>,
     <code>spark.shuffle.io.connectionTimeout</code>, <code>spark.rpc.askTimeout</code> or
@@ -991,8 +991,8 @@ Apart from these, the following properties are also available, and may be useful
   <td>
     Maximum number of retries when binding to a port before giving up.
     When a port is given a specific value (non 0), each subsequent retry will
-    increment the port used in the previous attempt by 1 before retrying. This 
-    essentially allows it to try a range of ports from the start port specified 
+    increment the port used in the previous attempt by 1 before retrying. This
+    essentially allows it to try a range of ports from the start port specified
     to port + maxRetries.
   </td>
 </tr>
@@ -1191,7 +1191,7 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.dynamicAllocation.executorIdleTimeout</code></td>
   <td>60s</td>
   <td>
-    If dynamic allocation is enabled and an executor has been idle for more than this duration, 
+    If dynamic allocation is enabled and an executor has been idle for more than this duration,
     the executor will be removed. For more detail, see this
     <a href="job-scheduling.html#resource-allocation-policy">description</a>.
   </td>
@@ -1424,11 +1424,11 @@ Apart from these, the following properties are also available, and may be useful
   <td>false</td>
   <td>
     Enables or disables Spark Streaming's internal backpressure mechanism (since 1.5).
-    This enables the Spark Streaming to control the receiving rate based on the 
+    This enables the Spark Streaming to control the receiving rate based on the
     current batch scheduling delays and processing times so that the system receives
-    only as fast as the system can process. Internally, this dynamically sets the 
+    only as fast as the system can process. Internally, this dynamically sets the
     maximum receiving rate of receivers. This rate is upper bounded by the values
-    `spark.streaming.receiver.maxRate` and `spark.streaming.kafka.maxRatePerPartition`
+    <code>spark.streaming.receiver.maxRate</code> and <code>spark.streaming.kafka.maxRatePerPartition</code>
     if they are set (see below).
   </td>
 </tr>
@@ -1542,15 +1542,15 @@ The following variables can be set in `spark-env.sh`:
   <tr><th style="width:21%">Environment Variable</th><th>Meaning</th></tr>
   <tr>
     <td><code>JAVA_HOME</code></td>
-    <td>Location where Java is installed (if it's not on your default `PATH`).</td>
+    <td>Location where Java is installed (if it's not on your default <code>PATH</code>).</td>
   </tr>
   <tr>
     <td><code>PYSPARK_PYTHON</code></td>
-    <td>Python binary executable to use for PySpark in both driver and workers (default is `python`).</td>
+    <td>Python binary executable to use for PySpark in both driver and workers (default is <code>python</code>).</td>
   </tr>
   <tr>
     <td><code>PYSPARK_DRIVER_PYTHON</code></td>
-    <td>Python binary executable to use for PySpark in driver only (default is PYSPARK_PYTHON).</td>
+    <td>Python binary executable to use for PySpark in driver only (default is <code>PYSPARK_PYTHON</code>).</td>
   </tr>
   <tr>
     <td><code>SPARK_LOCAL_IP</code></td>
@@ -1580,4 +1580,3 @@ Spark uses [log4j](http://logging.apache.org/log4j/) for logging. You can config
 To specify a different configuration directory other than the default "SPARK_HOME/conf",
 you can set SPARK_CONF_DIR. Spark will use the the configuration files (spark-defaults.conf, spark-env.sh, log4j.properties, etc)
 from this directory.
-
diff --git a/docs/programming-guide.md b/docs/programming-guide.md
index 4cf83bb39263..8ad238315f12 100644
--- a/docs/programming-guide.md
+++ b/docs/programming-guide.md
@@ -182,8 +182,8 @@ in-process.
 In the Spark shell, a special interpreter-aware SparkContext is already created for you, in the
 variable called `sc`. Making your own SparkContext will not work. You can set which master the
 context connects to using the `--master` argument, and you can add JARs to the classpath
-by passing a comma-separated list to the `--jars` argument. You can also add dependencies 
-(e.g. Spark Packages) to your shell session by supplying a comma-separated list of maven coordinates 
+by passing a comma-separated list to the `--jars` argument. You can also add dependencies
+(e.g. Spark Packages) to your shell session by supplying a comma-separated list of maven coordinates
 to the `--packages` argument. Any additional repositories where dependencies might exist (e.g. SonaType)
 can be passed to the `--repositories` argument. For example, to run `bin/spark-shell` on exactly
 four cores, use:
@@ -217,7 +217,7 @@ context connects to using the `--master` argument, and you can add Python .zip,
 to the runtime path by passing a comma-separated list to `--py-files`. You can also add dependencies
 (e.g. Spark Packages) to your shell session by supplying a comma-separated list of maven coordinates
 to the `--packages` argument. Any additional repositories where dependencies might exist (e.g. SonaType)
-can be passed to the `--repositories` argument. Any python dependencies a Spark Package has (listed in 
+can be passed to the `--repositories` argument. Any python dependencies a Spark Package has (listed in
 the requirements.txt of that package) must be manually installed using pip when necessary.
 For example, to run `bin/pyspark` on exactly four cores, use:
 
@@ -249,8 +249,8 @@ the [IPython Notebook](http://ipython.org/notebook.html) with PyLab plot support
 $ PYSPARK_DRIVER_PYTHON=ipython PYSPARK_DRIVER_PYTHON_OPTS="notebook" ./bin/pyspark
 {% endhighlight %}
 
-After the IPython Notebook server is launched, you can create a new "Python 2" notebook from 
-the "Files" tab. Inside the notebook, you can input the command `%pylab inline` as part of 
+After the IPython Notebook server is launched, you can create a new "Python 2" notebook from
+the "Files" tab. Inside the notebook, you can input the command `%pylab inline` as part of
 your notebook before you start to try Spark from the IPython notebook.
 
 </div>
@@ -418,9 +418,9 @@ Apart from text files, Spark's Python API also supports several other data forma
 
 **Writable Support**
 
-PySpark SequenceFile support loads an RDD of key-value pairs within Java, converts Writables to base Java types, and pickles the 
-resulting Java objects using [Pyrolite](https://github.com/irmen/Pyrolite/). When saving an RDD of key-value pairs to SequenceFile, 
-PySpark does the reverse. It unpickles Python objects into Java objects and then converts them to Writables. The following 
+PySpark SequenceFile support loads an RDD of key-value pairs within Java, converts Writables to base Java types, and pickles the
+resulting Java objects using [Pyrolite](https://github.com/irmen/Pyrolite/). When saving an RDD of key-value pairs to SequenceFile,
+PySpark does the reverse. It unpickles Python objects into Java objects and then converts them to Writables. The following
 Writables are automatically converted:
 
 <table class="table">
@@ -435,9 +435,9 @@ Writables are automatically converted:
 <tr><td>MapWritable</td><td>dict</td></tr>
 </table>
 
-Arrays are not handled out-of-the-box. Users need to specify custom `ArrayWritable` subtypes when reading or writing. When writing, 
-users also need to specify custom converters that convert arrays to custom `ArrayWritable` subtypes. When reading, the default 
-converter will convert custom `ArrayWritable` subtypes to Java `Object[]`, which then get pickled to Python tuples. To get 
+Arrays are not handled out-of-the-box. Users need to specify custom `ArrayWritable` subtypes when reading or writing. When writing,
+users also need to specify custom converters that convert arrays to custom `ArrayWritable` subtypes. When reading, the default
+converter will convert custom `ArrayWritable` subtypes to Java `Object[]`, which then get pickled to Python tuples. To get
 Python `array.array` for arrays of primitive types, users need to specify custom converters.
 
 **Saving and Loading SequenceFiles**
@@ -454,7 +454,7 @@ classes can be specified, but for standard Writables this is not required.
 
 **Saving and Loading Other Hadoop Input/Output Formats**
 
-PySpark can also read any Hadoop InputFormat or write any Hadoop OutputFormat, for both 'new' and 'old' Hadoop MapReduce APIs. 
+PySpark can also read any Hadoop InputFormat or write any Hadoop OutputFormat, for both 'new' and 'old' Hadoop MapReduce APIs.
 If required, a Hadoop configuration can be passed in as a Python dict. Here is an example using the
 Elasticsearch ESInputFormat:
 
@@ -474,15 +474,15 @@ Note that, if the InputFormat simply depends on a Hadoop configuration and/or in
 the key and value classes can easily be converted according to the above table,
 then this approach should work well for such cases.
 
-If you have custom serialized binary data (such as loading data from Cassandra / HBase), then you will first need to 
+If you have custom serialized binary data (such as loading data from Cassandra / HBase), then you will first need to
 transform that data on the Scala/Java side to something which can be handled by Pyrolite's pickler.
-A [Converter](api/scala/index.html#org.apache.spark.api.python.Converter) trait is provided 
-for this. Simply extend this trait and implement your transformation code in the ```convert``` 
-method. Remember to ensure that this class, along with any dependencies required to access your ```InputFormat```, are packaged into your Spark job jar and included on the PySpark 
+A [Converter](api/scala/index.html#org.apache.spark.api.python.Converter) trait is provided
+for this. Simply extend this trait and implement your transformation code in the ```convert```
+method. Remember to ensure that this class, along with any dependencies required to access your ```InputFormat```, are packaged into your Spark job jar and included on the PySpark
 classpath.
 
-See the [Python examples]({{site.SPARK_GITHUB_URL}}/tree/master/examples/src/main/python) and 
-the [Converter examples]({{site.SPARK_GITHUB_URL}}/tree/master/examples/src/main/scala/org/apache/spark/examples/pythonconverters) 
+See the [Python examples]({{site.SPARK_GITHUB_URL}}/tree/master/examples/src/main/python) and
+the [Converter examples]({{site.SPARK_GITHUB_URL}}/tree/master/examples/src/main/scala/org/apache/spark/examples/pythonconverters)
 for examples of using Cassandra / HBase ```InputFormat``` and ```OutputFormat``` with custom converters.
 
 </div>
@@ -758,7 +758,7 @@ One of the harder things about Spark is understanding the scope and life cycle o
 
 #### Example
 
-Consider the naive RDD element sum below, which behaves completely differently depending on whether execution is happening within the same JVM. A common example of this is when running Spark in `local` mode (`--master = local[n]`) versus deploying a Spark application to a cluster (e.g. via spark-submit to YARN): 
+Consider the naive RDD element sum below, which behaves completely differently depending on whether execution is happening within the same JVM. A common example of this is when running Spark in `local` mode (`--master = local[n]`) versus deploying a Spark application to a cluster (e.g. via spark-submit to YARN):
 
 <div class="codetabs">
 
@@ -777,7 +777,7 @@ println("Counter value: " + counter)
 <div data-lang="java"  markdown="1">
 {% highlight java %}
 int counter = 0;
-JavaRDD<Integer> rdd = sc.parallelize(data); 
+JavaRDD<Integer> rdd = sc.parallelize(data);
 
 // Wrong: Don't do this!!
 rdd.foreach(x -> counter += x);
@@ -803,7 +803,7 @@ print("Counter value: " + counter)
 
 #### Local vs. cluster modes
 
-The primary challenge is that the behavior of the above code is undefined. In local mode with a single JVM, the above code will sum the values within the RDD and store it in **counter**. This is because both the RDD and the variable **counter** are in the same memory space on the driver node. 
+The primary challenge is that the behavior of the above code is undefined. In local mode with a single JVM, the above code will sum the values within the RDD and store it in **counter**. This is because both the RDD and the variable **counter** are in the same memory space on the driver node.
 
 However, in `cluster` mode, what happens is more complicated, and the above may not work as intended. To execute jobs, Spark breaks up the processing of RDD operations into tasks - each of which is operated on by an executor. Prior to execution, Spark computes the **closure**. The closure is those variables and methods which must be visible for the executor to perform its computations on the RDD (in this case `foreach()`). This closure is serialized and sent to each executor. In `local` mode, there is only the one executors so everything shares the same closure. In other modes however, this is not the case and the executors running on seperate worker nodes each have their own copy of the closure.
 
@@ -813,9 +813,9 @@ To ensure well-defined behavior in these sorts of scenarios one should use an [`
 
 In general, closures - constructs like loops or locally defined methods, should not be used to mutate some global state. Spark does not define or guarantee the behavior of mutations to objects referenced from outside of closures. Some code that does this may work in local mode, but that's just by accident and such code will not behave as expected in distributed mode. Use an Accumulator instead if some global aggregation is needed.
 
-#### Printing elements of an RDD 
+#### Printing elements of an RDD
 Another common idiom is attempting to print out the elements of an RDD using `rdd.foreach(println)` or `rdd.map(println)`. On a single machine, this will generate the expected output and print all the RDD's elements. However, in `cluster` mode, the output to `stdout` being called by the executors is now writing to the executor's `stdout` instead, not the one on the driver, so `stdout` on the driver won't show these! To print all elements on the driver, one can use the `collect()` method to first bring the RDD to the driver node thus: `rdd.collect().foreach(println)`. This can cause the driver to run out of memory, though, because `collect()` fetches the entire RDD to a single machine; if you only need to print a few elements of the RDD, a safer approach is to use the `take()`: `rdd.take(100).foreach(println)`.
- 
+
 ### Working with Key-Value Pairs
 
 <div class="codetabs">
@@ -859,7 +859,7 @@ only available on RDDs of key-value pairs.
 The most common ones are distributed "shuffle" operations, such as grouping or aggregating the elements
 by a key.
 
-In Java, key-value pairs are represented using the 
+In Java, key-value pairs are represented using the
 [scala.Tuple2](http://www.scala-lang.org/api/{{site.SCALA_VERSION}}/index.html#scala.Tuple2) class
 from the Scala standard library. You can simply call `new Tuple2(a, b)` to create a tuple, and access
 its fields later with `tuple._1()` and `tuple._2()`.
@@ -974,7 +974,7 @@ for details.
   <td> <b>groupByKey</b>([<i>numTasks</i>]) <a name="GroupByLink"></a> </td>
   <td> When called on a dataset of (K, V) pairs, returns a dataset of (K, Iterable&lt;V&gt;) pairs. <br />
     <b>Note:</b> If you are grouping in order to perform an aggregation (such as a sum or
-      average) over each key, using <code>reduceByKey</code> or <code>aggregateByKey</code> will yield much better 
+      average) over each key, using <code>reduceByKey</code> or <code>aggregateByKey</code> will yield much better
       performance.
     <br />
     <b>Note:</b> By default, the level of parallelism in the output depends on the number of partitions of the parent RDD.
@@ -1025,7 +1025,7 @@ for details.
 <tr>
   <td> <b>repartitionAndSortWithinPartitions</b>(<i>partitioner</i>) <a name="Repartition2Link"></a></td>
   <td> Repartition the RDD according to the given partitioner and, within each resulting partition,
-  sort records by their keys. This is more efficient than calling <code>repartition</code> and then sorting within 
+  sort records by their keys. This is more efficient than calling <code>repartition</code> and then sorting within
   each partition because it can push the sorting down into the shuffle machinery. </td>
 </tr>
 </table>
@@ -1038,7 +1038,7 @@ RDD API doc
  [Java](api/java/index.html?org/apache/spark/api/java/JavaRDD.html),
  [Python](api/python/pyspark.html#pyspark.RDD),
  [R](api/R/index.html))
- 
+
 and pair RDD functions doc
 ([Scala](api/scala/index.html#org.apache.spark.rdd.PairRDDFunctions),
  [Java](api/java/index.html?org/apache/spark/api/java/JavaPairRDD.html))
@@ -1094,7 +1094,7 @@ for details.
 </tr>
 <tr>
   <td> <b>foreach</b>(<i>func</i>) </td>
-  <td> Run a function <i>func</i> on each element of the dataset. This is usually done for side effects such as updating an <a href="#AccumLink">Accumulator</a> or interacting with external storage systems. 
+  <td> Run a function <i>func</i> on each element of the dataset. This is usually done for side effects such as updating an <a href="#AccumLink">Accumulator</a> or interacting with external storage systems.
   <br /><b>Note</b>: modifying variables other than Accumulators outside of the <code>foreach()</code> may result in undefined behavior. See <a href="#ClosuresLink">Understanding closures </a> for more details.</td>
 </tr>
 </table>
@@ -1118,13 +1118,13 @@ co-located to compute the result.
 In Spark, data is generally not distributed across partitions to be in the necessary place for a
 specific operation. During computations, a single task will operate on a single partition - thus, to
 organize all the data for a single `reduceByKey` reduce task to execute, Spark needs to perform an
-all-to-all operation. It must read from all partitions to find all the values for all keys, 
-and then bring together values across partitions to compute the final result for each key - 
+all-to-all operation. It must read from all partitions to find all the values for all keys,
+and then bring together values across partitions to compute the final result for each key -
 this is called the **shuffle**.
 
 Although the set of elements in each partition of newly shuffled data will be deterministic, and so
-is the ordering of partitions themselves, the ordering of these elements is not. If one desires predictably 
-ordered data following shuffle then it's possible to use: 
+is the ordering of partitions themselves, the ordering of these elements is not. If one desires predictably
+ordered data following shuffle then it's possible to use:
 
 * `mapPartitions` to sort each partition using, for example, `.sorted`
 * `repartitionAndSortWithinPartitions` to efficiently sort partitions while simultaneously repartitioning
@@ -1141,26 +1141,26 @@ network I/O. To organize data for the shuffle, Spark generates sets of tasks - *
 organize the data, and a set of *reduce* tasks to aggregate it. This nomenclature comes from
 MapReduce and does not directly relate to Spark's `map` and `reduce` operations.
 
-Internally, results from individual map tasks are kept in memory until they can't fit. Then, these 
-are sorted based on the target partition and written to a single file. On the reduce side, tasks 
+Internally, results from individual map tasks are kept in memory until they can't fit. Then, these
+are sorted based on the target partition and written to a single file. On the reduce side, tasks
 read the relevant sorted blocks.
-        
-Certain shuffle operations can consume significant amounts of heap memory since they employ 
-in-memory data structures to organize records before or after transferring them. Specifically, 
-`reduceByKey` and `aggregateByKey` create these structures on the map side, and `'ByKey` operations 
-generate these on the reduce side. When data does not fit in memory Spark will spill these tables 
+
+Certain shuffle operations can consume significant amounts of heap memory since they employ
+in-memory data structures to organize records before or after transferring them. Specifically,
+`reduceByKey` and `aggregateByKey` create these structures on the map side, and `'ByKey` operations
+generate these on the reduce side. When data does not fit in memory Spark will spill these tables
 to disk, incurring the additional overhead of disk I/O and increased garbage collection.
 
 Shuffle also generates a large number of intermediate files on disk. As of Spark 1.3, these files
-are preserved until the corresponding RDDs are no longer used and are garbage collected. 
-This is done so the shuffle files don't need to be re-created if the lineage is re-computed. 
-Garbage collection may happen only after a long period time, if the application retains references 
-to these RDDs or if GC does not kick in frequently. This means that long-running Spark jobs may 
+are preserved until the corresponding RDDs are no longer used and are garbage collected.
+This is done so the shuffle files don't need to be re-created if the lineage is re-computed.
+Garbage collection may happen only after a long period time, if the application retains references
+to these RDDs or if GC does not kick in frequently. This means that long-running Spark jobs may
 consume a large amount of disk space. The temporary storage directory is specified by the
 `spark.local.dir` configuration parameter when configuring the Spark context.
 
 Shuffle behavior can be tuned by adjusting a variety of configuration parameters. See the
-'Shuffle Behavior' section within the [Spark Configuration Guide](configuration.html). 
+'Shuffle Behavior' section within the [Spark Configuration Guide](configuration.html).
 
 ## RDD Persistence
 
@@ -1246,7 +1246,7 @@ efficiency. We recommend going through the following process to select one:
   This is the most CPU-efficient option, allowing operations on the RDDs to run as fast as possible.
 
 * If not, try using `MEMORY_ONLY_SER` and [selecting a fast serialization library](tuning.html) to
-make the objects much more space-efficient, but still reasonably fast to access. 
+make the objects much more space-efficient, but still reasonably fast to access.
 
 * Don't spill to disk unless the functions that computed your datasets are expensive, or they filter
 a large amount of the data. Otherwise, recomputing a partition may be as fast as reading it from
@@ -1345,7 +1345,7 @@ Accumulators are variables that are only "added" to through an associative opera
 therefore be efficiently supported in parallel. They can be used to implement counters (as in
 MapReduce) or sums. Spark natively supports accumulators of numeric types, and programmers
 can add support for new types. If accumulators are created with a name, they will be
-displayed in Spark's UI. This can be useful for understanding the progress of 
+displayed in Spark's UI. This can be useful for understanding the progress of
 running stages (NOTE: this is not yet supported in Python).
 
 An accumulator is created from an initial value `v` by calling `SparkContext.accumulator(v)`. Tasks
@@ -1474,8 +1474,8 @@ vecAccum = sc.accumulator(Vector(...), VectorAccumulatorParam())
 
 </div>
 
-For accumulator updates performed inside <b>actions only</b>, Spark guarantees that each task's update to the accumulator 
-will only be applied once, i.e. restarted tasks will not update the value. In transformations, users should be aware 
+For accumulator updates performed inside <b>actions only</b>, Spark guarantees that each task's update to the accumulator
+will only be applied once, i.e. restarted tasks will not update the value. In transformations, users should be aware
 of that each task's update may be applied more than once if tasks or job stages are re-executed.
 
 Accumulators do not change the lazy evaluation model of Spark. If they are being updated within an operation on an RDD, their value is only updated once that RDD is computed as part of an action. Consequently, accumulator updates are not guaranteed to be executed when made within a lazy transformation like `map()`. The below code fragment demonstrates this property:
@@ -1486,7 +1486,7 @@ Accumulators do not change the lazy evaluation model of Spark. If they are being
 {% highlight scala %}
 val accum = sc.accumulator(0)
 data.map { x => accum += x; f(x) }
-// Here, accum is still 0 because no actions have caused the `map` to be computed.
+// Here, accum is still 0 because no actions have caused the <code>map</code> to be computed.
 {% endhighlight %}
 </div>
 
@@ -1553,7 +1553,7 @@ Several changes were made to the Java API:
   code that `extends Function` should `implement Function` instead.
 * New variants of the `map` transformations, like `mapToPair` and `mapToDouble`, were added to create RDDs
   of special data types.
-* Grouping operations like `groupByKey`, `cogroup` and `join` have changed from returning 
+* Grouping operations like `groupByKey`, `cogroup` and `join` have changed from returning
   `(Key, List<Value>)` pairs to `(Key, Iterable<Value>)`.
 
 </div>
diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index 330c159c67bc..460a66f37dd6 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -245,7 +245,7 @@ See the [configuration page](configuration.html) for information on Spark config
   <td><code>spark.mesos.coarse</code></td>
   <td>false</td>
   <td>
-    If set to "true", runs over Mesos clusters in
+    If set to <code>true</code>, runs over Mesos clusters in
     <a href="running-on-mesos.html#mesos-run-modes">"coarse-grained" sharing mode</a>,
     where Spark acquires one long-lived Mesos task on each machine instead of one Mesos task per
     Spark task. This gives lower-latency scheduling for short queries, but leaves resources in use
@@ -254,16 +254,16 @@ See the [configuration page](configuration.html) for information on Spark config
 </tr>
 <tr>
   <td><code>spark.mesos.extra.cores</code></td>
-  <td>0</td>
+  <td><code>0</code></td>
   <td>
     Set the extra amount of cpus to request per task. This setting is only used for Mesos coarse grain mode.
     The total amount of cores requested per task is the number of cores in the offer plus the extra cores configured.
-    Note that total amount of cores the executor will request in total will not exceed the spark.cores.max setting.
+    Note that total amount of cores the executor will request in total will not exceed the <code>spark.cores.max</code> setting.
   </td>
 </tr>
 <tr>
   <td><code>spark.mesos.mesosExecutor.cores</code></td>
-  <td>1.0</td>
+  <td><code>1.0</code></td>
   <td>
     (Fine-grained mode only) Number of cores to give each Mesos executor. This does not
     include the cores used to run the Spark tasks. In other words, even if no Spark task
@@ -287,7 +287,7 @@ See the [configuration page](configuration.html) for information on Spark config
   <td>
     Set the list of volumes which will be mounted into the Docker image, which was set using
     <code>spark.mesos.executor.docker.image</code>. The format of this property is a comma-separated list of
-    mappings following the form passed to <tt>docker run -v</tt>. That is they take the form:
+    mappings following the form passed to <code>docker run -v</code>. That is they take the form:
 
     <pre>[host_path:]container_path[:ro|:rw]</pre>
   </td>
@@ -318,7 +318,7 @@ See the [configuration page](configuration.html) for information on Spark config
   <td>executor memory * 0.10, with minimum of 384</td>
   <td>
     The amount of additional memory, specified in MB, to be allocated per executor. By default,
-    the overhead will be larger of either 384 or 10% of `spark.executor.memory`. If it's set,
+    the overhead will be larger of either 384 or 10% of <code>spark.executor.memory</code>. If set,
     the final overhead will be this value.
   </td>
 </tr>
@@ -339,7 +339,7 @@ See the [configuration page](configuration.html) for information on Spark config
 </tr>
 <tr>
   <td><code>spark.mesos.secret</code></td>
-  <td>(none)/td>
+  <td>(none)</td>
   <td>
     Set the secret with which Spark framework will use to authenticate with Mesos.
   </td>
diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index 3a961d245f3d..0e25ccf512c0 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -23,7 +23,7 @@ Unlike [Spark standalone](spark-standalone.html) and [Mesos](running-on-mesos.ht
 To launch a Spark application in `yarn-cluster` mode:
 
     $ ./bin/spark-submit --class path.to.your.Class --master yarn-cluster [options] <app jar> [app options]
-    
+
 For example:
 
     $ ./bin/spark-submit --class org.apache.spark.examples.SparkPi \
@@ -43,7 +43,7 @@ To launch a Spark application in `yarn-client` mode, do the same, but replace `y
 
 ## Adding Other JARs
 
-In `yarn-cluster` mode, the driver runs on a different machine than the client, so `SparkContext.addJar` won't work out of the box with files that are local to the client. To make files on the client available to `SparkContext.addJar`, include them with the `--jars` option in the launch command. 
+In `yarn-cluster` mode, the driver runs on a different machine than the client, so `SparkContext.addJar` won't work out of the box with files that are local to the client. To make files on the client available to `SparkContext.addJar`, include them with the `--jars` option in the launch command.
 
     $ ./bin/spark-submit --class my.main.Class \
         --master yarn-cluster \
@@ -64,16 +64,16 @@ Most of the configs are the same for Spark on YARN as for other deployment modes
 
 # Debugging your Application
 
-In YARN terminology, executors and application masters run inside "containers". YARN has two modes for handling container logs after an application has completed. If log aggregation is turned on (with the `yarn.log-aggregation-enable` config), container logs are copied to HDFS and deleted on the local machine. These logs can be viewed from anywhere on the cluster with the "yarn logs" command.
+In YARN terminology, executors and application masters run inside "containers". YARN has two modes for handling container logs after an application has completed. If log aggregation is turned on (with the `yarn.log-aggregation-enable` config), container logs are copied to HDFS and deleted on the local machine. These logs can be viewed from anywhere on the cluster with the `yarn logs` command.
 
     yarn logs -applicationId <app ID>
-    
+
 will print out the contents of all log files from all containers from the given application. You can also view the container log files directly in HDFS using the HDFS shell or API. The directory where they are located can be found by looking at your YARN configs (`yarn.nodemanager.remote-app-log-dir` and `yarn.nodemanager.remote-app-log-dir-suffix`). The logs are also available on the Spark Web UI under the Executors Tab. You need to have both the Spark history server and the MapReduce history server running and configure `yarn.log.server.url` in `yarn-site.xml` properly. The log URL on the Spark history server UI will redirect you to the MapReduce history server to show the aggregated logs.
 
 When log aggregation isn't turned on, logs are retained locally on each machine under `YARN_APP_LOGS_DIR`, which is usually configured to `/tmp/logs` or `$HADOOP_HOME/logs/userlogs` depending on the Hadoop version and installation. Viewing logs for a container requires going to the host that contains them and looking in this directory.  Subdirectories organize log files by application ID and container ID. The logs are also available on the Spark Web UI under the Executors Tab and doesn't require running the MapReduce history server.
 
 To review per-container launch environment, increase `yarn.nodemanager.delete.debug-delay-sec` to a
-large value (e.g. 36000), and then access the application cache through `yarn.nodemanager.local-dirs`
+large value (e.g. `36000`), and then access the application cache through `yarn.nodemanager.local-dirs`
 on the nodes on which containers are launched. This directory contains the launch script, JARs, and
 all environment variables used for launching each container. This process is useful for debugging
 classpath problems in particular. (Note that enabling this requires admin privileges on cluster
@@ -92,7 +92,7 @@ Note that for the first option, both executors and the application master will s
 log4j configuration, which may cause issues when they run on the same node (e.g. trying to write
 to the same log file).
 
-If you need a reference to the proper location to put log files in the YARN so that YARN can properly display and aggregate them, use `spark.yarn.app.container.log.dir` in your log4j.properties. For example, `log4j.appender.file_appender.File=${spark.yarn.app.container.log.dir}/spark.log`. For streaming application, configuring `RollingFileAppender` and setting file location to YARN's log directory will avoid disk overflow caused by large log file, and logs can be accessed using YARN's log utility.
+If you need a reference to the proper location to put log files in the YARN so that YARN can properly display and aggregate them, use `spark.yarn.app.container.log.dir` in your `log4j.properties`. For example, `log4j.appender.file_appender.File=${spark.yarn.app.container.log.dir}/spark.log`. For streaming applications, configuring `RollingFileAppender` and setting file location to YARN's log directory will avoid disk overflow caused by large log files, and logs can be accessed using YARN's log utility.
 
 #### Spark Properties
 
@@ -100,24 +100,26 @@ If you need a reference to the proper location to put log files in the YARN so t
 <tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
 <tr>
   <td><code>spark.yarn.am.memory</code></td>
-  <td>512m</td>
+  <td><code>512m</code></td>
   <td>
     Amount of memory to use for the YARN Application Master in client mode, in the same format as JVM memory strings (e.g. <code>512m</code>, <code>2g</code>).
     In cluster mode, use <code>spark.driver.memory</code> instead.
+    <p/>
+    Use lower-case suffixes, e.g. <code>k</code>, <code>m</code>, <code>g</code>, <code>t</code>, and <code>p</code>, for kibi-, mebi-, gibi-, tebi-, and pebibytes, respectively.
   </td>
 </tr>
 <tr>
   <td><code>spark.driver.cores</code></td>
-  <td>1</td>
+  <td><code>1</code></td>
   <td>
     Number of cores used by the driver in YARN cluster mode.
-    Since the driver is run in the same JVM as the YARN Application Master in cluster mode, this also controls the cores used by the YARN AM.
-    In client mode, use <code>spark.yarn.am.cores</code> to control the number of cores used by the YARN AM instead.
+    Since the driver is run in the same JVM as the YARN Application Master in cluster mode, this also controls the cores used by the YARN Application Master.
+    In client mode, use <code>spark.yarn.am.cores</code> to control the number of cores used by the YARN Application Master instead.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.am.cores</code></td>
-  <td>1</td>
+  <td><code>1</code></td>
   <td>
     Number of cores to use for the YARN Application Master in client mode.
     In cluster mode, use <code>spark.driver.cores</code> instead.
@@ -125,39 +127,39 @@ If you need a reference to the proper location to put log files in the YARN so t
 </tr>
 <tr>
   <td><code>spark.yarn.am.waitTime</code></td>
-  <td>100s</td>
+  <td><code>100s</code></td>
   <td>
-    In `yarn-cluster` mode, time for the application master to wait for the
-    SparkContext to be initialized. In `yarn-client` mode, time for the application master to wait
+    In <code>yarn-cluster</code> mode, time for the YARN Application Master to wait for the
+    SparkContext to be initialized. In <code>yarn-client</code> mode, time for the YARN Application Master to wait
     for the driver to connect to it.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.submit.file.replication</code></td>
-  <td>The default HDFS replication (usually 3)</td>
+  <td>The default HDFS replication (usually <code>3</code>)</td>
   <td>
     HDFS replication level for the files uploaded into HDFS for the application. These include things like the Spark jar, the app jar, and any distributed cache files/archives.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.preserve.staging.files</code></td>
-  <td>false</td>
+  <td><code>false</code></td>
   <td>
-    Set to true to preserve the staged files (Spark jar, app jar, distributed cache files) at the end of the job rather than delete them.
+    Set to <code>true</code> to preserve the staged files (Spark jar, app jar, distributed cache files) at the end of the job rather than delete them.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.scheduler.heartbeat.interval-ms</code></td>
-  <td>3000</td>
+  <td><code>3000</code></td>
   <td>
     The interval in ms in which the Spark application master heartbeats into the YARN ResourceManager.
-    The value is capped at half the value of YARN's configuration for the expiry interval
-    (<code>yarn.am.liveness-monitor.expiry-interval-ms</code>).
+    The value is capped at half the value of YARN's configuration for the expiry interval, i.e.
+    <code>yarn.am.liveness-monitor.expiry-interval-ms</code>.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.scheduler.initial-allocation.interval</code></td>
-  <td>200ms</td>
+  <td><code>200ms</code></td>
   <td>
     The initial interval in which the Spark application master eagerly heartbeats to the YARN ResourceManager
     when there are pending container allocation requests. It should be no larger than
@@ -177,8 +179,8 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td><code>spark.yarn.historyServer.address</code></td>
   <td>(none)</td>
   <td>
-    The address of the Spark history server (i.e. host.com:18080). The address should not contain a scheme (http://). Defaults to not being set since the history server is an optional service. This address is given to the YARN ResourceManager when the Spark application finishes to link the application from the ResourceManager UI to the Spark history server UI. 
-    For this property, YARN properties can be used as variables, and these are substituted by Spark at runtime. For eg, if the Spark history server runs on the same node as the YARN ResourceManager, it can be set to `${hadoopconf-yarn.resourcemanager.hostname}:18080`. 
+    The address of the Spark history server, e.g. <code>host.com:18080</code>. The address should not contain a scheme (<code>http://</code>). Defaults to not being set since the history server is an optional service. This address is given to the YARN ResourceManager when the Spark application finishes to link the application from the ResourceManager UI to the Spark history server UI.
+    For this property, YARN properties can be used as variables, and these are substituted by Spark at runtime. For example, if the Spark history server runs on the same node as the YARN ResourceManager, it can be set to <code>${hadoopconf-yarn.resourcemanager.hostname}:18080</code>.
   </td>
 </tr>
 <tr>
@@ -197,42 +199,42 @@ If you need a reference to the proper location to put log files in the YARN so t
 </tr>
 <tr>
  <td><code>spark.executor.instances</code></td>
-  <td>2</td>
+  <td><code>2</code></td>
   <td>
-    The number of executors. Note that this property is incompatible with <code>spark.dynamicAllocation.enabled</code>. If both <code>spark.dynamicAllocation.enabled</code> and <code>spark.executor.instances</code> are specified, dynamic allocation is turned off and the specified number of <code>spark.executor.instances</code> is used. 
+    The number of executors. Note that this property is incompatible with <code>spark.dynamicAllocation.enabled</code>. If both <code>spark.dynamicAllocation.enabled</code> and <code>spark.executor.instances</code> are specified, dynamic allocation is turned off and the specified number of <code>spark.executor.instances</code> is used.
   </td>
 </tr>
 <tr>
  <td><code>spark.yarn.executor.memoryOverhead</code></td>
   <td>executorMemory * 0.10, with minimum of 384 </td>
   <td>
-    The amount of off heap memory (in megabytes) to be allocated per executor. This is memory that accounts for things like VM overheads, interned strings, other native overheads, etc. This tends to grow with the executor size (typically 6-10%).
+    The amount of off-heap memory (in megabytes) to be allocated per executor. This is memory that accounts for things like VM overheads, interned strings, other native overheads, etc. This tends to grow with the executor size (typically 6-10%).
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.driver.memoryOverhead</code></td>
   <td>driverMemory * 0.10, with minimum of 384 </td>
   <td>
-    The amount of off heap memory (in megabytes) to be allocated per driver in cluster mode. This is memory that accounts for things like VM overheads, interned strings, other native overheads, etc. This tends to grow with the container size (typically 6-10%).
+    The amount of off-heap memory (in megabytes) to be allocated per driver in cluster mode. This is memory that accounts for things like VM overheads, interned strings, other native overheads, etc. This tends to grow with the container size (typically 6-10%).
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.am.memoryOverhead</code></td>
   <td>AM memory * 0.10, with minimum of 384 </td>
   <td>
-    Same as <code>spark.yarn.driver.memoryOverhead</code>, but for the Application Master in client mode.
+    Same as <code>spark.yarn.driver.memoryOverhead</code>, but for the YARN Application Master in client mode.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.am.port</code></td>
   <td>(random)</td>
   <td>
-    Port for the YARN Application Master to listen on. In YARN client mode, this is used to communicate between the Spark driver running on a gateway and the Application Master running on YARN. In YARN cluster mode, this is used for the dynamic executor feature, where it handles the kill from the scheduler backend.
+    Port for the YARN Application Master to listen on. In YARN client mode, this is used to communicate between the Spark driver running on a gateway and the YARN Application Master running on YARN. In YARN cluster mode, this is used for the dynamic executor feature, where it handles the kill from the scheduler backend.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.queue</code></td>
-  <td>default</td>
+  <td><code>default</code></td>
   <td>
     The name of the YARN queue to which the application is submitted.
   </td>
@@ -245,18 +247,18 @@ If you need a reference to the proper location to put log files in the YARN so t
     By default, Spark on YARN will use a Spark jar installed locally, but the Spark jar can also be
     in a world-readable location on HDFS. This allows YARN to cache it on nodes so that it doesn't
     need to be distributed each time an application runs. To point to a jar on HDFS, for example,
-    set this configuration to "hdfs:///some/path".
+    set this configuration to <code>hdfs:///some/path</code>.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.access.namenodes</code></td>
   <td>(none)</td>
   <td>
-    A list of secure HDFS namenodes your Spark application is going to access. For 
-    example, `spark.yarn.access.namenodes=hdfs://nn1.com:8032,hdfs://nn2.com:8032`. 
-    The Spark application must have acess to the namenodes listed and Kerberos must 
-    be properly configured to be able to access them (either in the same realm or in 
-    a trusted realm). Spark acquires security tokens for each of the namenodes so that 
+    A comma-separated list of secure HDFS namenodes your Spark application is going to access. For
+    example, <code>spark.yarn.access.namenodes=hdfs://nn1.com:8032,hdfs://nn2.com:8032</code>.
+    The Spark application must have access to the namenodes listed and Kerberos must
+    be properly configured to be able to access them (either in the same realm or in
+    a trusted realm). Spark acquires security tokens for each of the namenodes so that
     the Spark application can access those remote HDFS clusters.
   </td>
 </tr>
@@ -264,18 +266,18 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td><code>spark.yarn.appMasterEnv.[EnvironmentVariableName]</code></td>
   <td>(none)</td>
   <td>
-     Add the environment variable specified by <code>EnvironmentVariableName</code> to the 
-     Application Master process launched on YARN. The user can specify multiple of 
-     these and to set multiple environment variables. In `yarn-cluster` mode this controls 
-     the environment of the SPARK driver and in `yarn-client` mode it only controls 
-     the environment of the executor launcher. 
+     Add the environment variable specified by <code>EnvironmentVariableName</code> to the
+     Application Master process launched on YARN. The user can specify multiple of
+     these and to set multiple environment variables. In <code>yarn-cluster</code> mode this controls
+     the environment of the Spark driver and in <code>yarn-client</code> mode it only controls
+     the environment of the executor launcher.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.containerLauncherMaxThreads</code></td>
-  <td>25</td>
+  <td><code>25</code></td>
   <td>
-    The maximum number of threads to use in the application master for launching executor containers.
+    The maximum number of threads to use in the YARN Application Master for launching executor containers.
   </td>
 </tr>
 <tr>
@@ -283,19 +285,19 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td>(none)</td>
   <td>
   A string of extra JVM options to pass to the YARN Application Master in client mode.
-  In cluster mode, use `spark.driver.extraJavaOptions` instead.
+  In cluster mode, use <code>spark.driver.extraJavaOptions</code> instead.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.am.extraLibraryPath</code></td>
   <td>(none)</td>
   <td>
-    Set a special library path to use when launching the application master in client mode.
+    Set a special library path to use when launching the YARN Application Master in client mode.
   </td>
 </tr>
 <tr>
   <td><code>spark.yarn.maxAppAttempts</code></td>
-  <td>yarn.resourcemanager.am.max-attempts in YARN</td>
+  <td><code>yarn.resourcemanager.am.max-attempts</code> in YARN</td>
   <td>
   The maximum number of attempts that will be made to submit the application.
   It should be no larger than the global number of max attempts in the YARN configuration.
@@ -303,10 +305,10 @@ If you need a reference to the proper location to put log files in the YARN so t
 </tr>
 <tr>
   <td><code>spark.yarn.submit.waitAppCompletion</code></td>
-  <td>true</td>
+  <td><code>true</code></td>
   <td>
   In YARN cluster mode, controls whether the client waits to exit until the application completes.
-  If set to true, the client process will stay alive reporting the application's status.
+  If set to <code>true</code>, the client process will stay alive reporting the application's status.
   Otherwise, the client process will exit after submission.
   </td>
 </tr>
@@ -332,7 +334,7 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td>(none)</td>
   <td>
   The full path to the file that contains the keytab for the principal specified above.
-  This keytab will be copied to the node running the Application Master via the Secure Distributed Cache,
+  This keytab will be copied to the node running the YARN Application Master via the Secure Distributed Cache,
   for renewing the login tickets and the delegation tokens periodically.
   </td>
 </tr>
@@ -371,14 +373,14 @@ If you need a reference to the proper location to put log files in the YARN so t
 </tr>
 <tr>
   <td><code>spark.yarn.security.tokens.${service}.enabled</code></td>
-  <td>true</td>
+  <td><code>true</code></td>
   <td>
   Controls whether to retrieve delegation tokens for non-HDFS services when security is enabled.
   By default, delegation tokens for all supported services are retrieved when those services are
   configured, but it's possible to disable that behavior if it somehow conflicts with the
   application being run.
   <p/>
-  Currently supported services are: hive, hbase
+  Currently supported services are: <code>hive</code>, <code>hbase</code>
   </td>
 </tr>
 </table>
@@ -387,5 +389,5 @@ If you need a reference to the proper location to put log files in the YARN so t
 
 - Whether core requests are honored in scheduling decisions depends on which scheduler is in use and how it is configured.
 - In `yarn-cluster` mode, the local directories used by the Spark executors and the Spark driver will be the local directories configured for YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`, it will be ignored. In `yarn-client` mode, the Spark executors will use the local directories configured for YARN while the Spark driver will use those defined in `spark.local.dir`. This is because the Spark driver does not run on the YARN cluster in `yarn-client` mode, only the Spark executors do.
-- The `--files` and `--archives` options support specifying file names with the # similar to Hadoop. For example you can specify: `--files localtest.txt#appSees.txt` and this will upload the file you have locally named localtest.txt into HDFS but this will be linked to by the name `appSees.txt`, and your application should use the name as `appSees.txt` to reference it when running on YARN.
+- The `--files` and `--archives` options support specifying file names with the # similar to Hadoop. For example you can specify: `--files localtest.txt#appSees.txt` and this will upload the file you have locally named `localtest.txt` into HDFS but this will be linked to by the name `appSees.txt`, and your application should use the name as `appSees.txt` to reference it when running on YARN.
 - The `--jars` option allows the `SparkContext.addJar` function to work if you are using it with local files and running in `yarn-cluster` mode. It does not need to be used if you are using it with HDFS, HTTP, HTTPS, or FTP files.
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 7ae9244c271e..a1cbc7de97c6 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1676,7 +1676,7 @@ results <- collect(sql(sqlContext, "FROM src SELECT key, value"))
 ### Interacting with Different Versions of Hive Metastore
 
 One of the most important pieces of Spark SQL's Hive support is interaction with Hive metastore,
-which enables Spark SQL to access metadata of Hive tables. Starting from Spark 1.4.0, a single binary 
+which enables Spark SQL to access metadata of Hive tables. Starting from Spark 1.4.0, a single binary
 build of Spark SQL can be used to query different versions of Hive metastores, using the configuration described below.
 Note that independent of the version of Hive that is being used to talk to the metastore, internally Spark SQL
 will compile against Hive 1.2.1 and use those classes for internal execution (serdes, UDFs, UDAFs, etc).
@@ -1706,8 +1706,8 @@ The following options can be used to configure the version of Hive that is used
         either <code>1.2.1</code> or not defined.
         <li><code>maven</code></li>
         Use Hive jars of specified version downloaded from Maven repositories.  This configuration
-        is not generally recommended for production deployments. 
-        <li>A classpath in the standard format for the JVM.  This classpath must include all of Hive 
+        is not generally recommended for production deployments.
+        <li>A classpath in the standard format for the JVM.  This classpath must include all of Hive
         and its dependencies, including the correct version of Hadoop.  These jars only need to be
         present on the driver, but if you are running in yarn cluster mode then you must ensure
         they are packaged with you application.</li>
@@ -1806,7 +1806,7 @@ the Data Sources API.  The following options are supported:
 <div data-lang="scala"  markdown="1">
 
 {% highlight scala %}
-val jdbcDF = sqlContext.read.format("jdbc").options( 
+val jdbcDF = sqlContext.read.format("jdbc").options(
   Map("url" -> "jdbc:postgresql:dbserver",
   "dbtable" -> "schema.tablename")).load()
 {% endhighlight %}
@@ -2023,11 +2023,11 @@ options.
 
  - Optimized execution using manually managed memory (Tungsten) is now enabled by default, along with
    code generation for expression evaluation.  These features can both be disabled by setting
-   `spark.sql.tungsten.enabled` to `false.
- - Parquet schema merging is no longer enabled by default.  It can be re-enabled by setting 
+   `spark.sql.tungsten.enabled` to `false`.
+ - Parquet schema merging is no longer enabled by default.  It can be re-enabled by setting
    `spark.sql.parquet.mergeSchema` to `true`.
- - Resolution of strings to columns in python now supports using dots (`.`) to qualify the column or 
-   access nested values.  For example `df['table.column.nestedField']`.  However, this means that if 
+ - Resolution of strings to columns in python now supports using dots (`.`) to qualify the column or
+   access nested values.  For example `df['table.column.nestedField']`.  However, this means that if
    your column name contains any dots you must now escape them using backticks (e.g., ``table.`column.with.dots`.nested``).   
  - In-memory columnar storage partition pruning is on by default. It can be disabled by setting
    `spark.sql.inMemoryColumnarStorage.partitionPruning` to `false`.
diff --git a/docs/submitting-applications.md b/docs/submitting-applications.md
index 7ea4d6f1a3f8..915be0f47915 100644
--- a/docs/submitting-applications.md
+++ b/docs/submitting-applications.md
@@ -103,7 +103,7 @@ run it with `--help`. Here are a few examples of common options:
 export HADOOP_CONF_DIR=XXX
 ./bin/spark-submit \
   --class org.apache.spark.examples.SparkPi \
-  --master yarn-cluster \  # can also be `yarn-client` for client mode
+  --master yarn-cluster \  # can also be yarn-client for client mode
   --executor-memory 20G \
   --num-executors 50 \
   /path/to/examples.jar \
@@ -174,9 +174,9 @@ This can use up a significant amount of space over time and will need to be clea
 is handled automatically, and with Spark standalone, automatic cleanup can be configured with the
 `spark.worker.cleanup.appDataTtl` property.
 
-Users may also include any other dependencies by supplying a comma-delimited list of maven coordinates 
-with `--packages`. All transitive dependencies will be handled when using this command. Additional 
-repositories (or resolvers in SBT) can be added in a comma-delimited fashion with the flag `--repositories`. 
+Users may also include any other dependencies by supplying a comma-delimited list of maven coordinates
+with `--packages`. All transitive dependencies will be handled when using this command. Additional
+repositories (or resolvers in SBT) can be added in a comma-delimited fashion with the flag `--repositories`.
 These commands can be used with `pyspark`, `spark-shell`, and `spark-submit` to include Spark Packages.
 
 For Python, the equivalent `--py-files` option can be used to distribute `.egg`, `.zip` and `.py` libraries

From 331f0b10f78a37d96d3e573d211d74a0935265db Mon Sep 17 00:00:00 2001
From: Meihua Wu <meihuawu@umich.edu>
Date: Mon, 21 Sep 2015 12:09:00 -0700
Subject: [PATCH 047/896] [SPARK-9642] [ML] LinearRegression should supported
 weighted data

In many modeling application, data points are not necessarily sampled with equal probabilities. Linear regression should support weighting which account the over or under sampling.

work in progress.

Author: Meihua Wu <meihuawu@umich.edu>

Closes #8631 from rotationsymmetry/SPARK-9642.
---
 .../ml/regression/LinearRegression.scala      | 164 +++++++++++-------
 .../ml/regression/LinearRegressionSuite.scala |  88 ++++++++++
 project/MimaExcludes.scala                    |   8 +-
 3 files changed, 191 insertions(+), 69 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index e4602d36ccc8..78a67c5fdab2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -31,21 +31,29 @@ import org.apache.spark.ml.util.Identifiable
 import org.apache.spark.mllib.evaluation.RegressionMetrics
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.linalg.BLAS._
-import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.stat.MultivariateOnlineSummarizer
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.{DataFrame, Row}
-import org.apache.spark.sql.functions.{col, udf}
-import org.apache.spark.sql.types.StructField
+import org.apache.spark.sql.functions.{col, udf, lit}
 import org.apache.spark.storage.StorageLevel
-import org.apache.spark.util.StatCounter
 
 /**
  * Params for linear regression.
  */
 private[regression] trait LinearRegressionParams extends PredictorParams
     with HasRegParam with HasElasticNetParam with HasMaxIter with HasTol
-    with HasFitIntercept with HasStandardization
+    with HasFitIntercept with HasStandardization with HasWeightCol
+
+/**
+ * Class that represents an instance of weighted data point with label and features.
+ *
+ * TODO: Refactor this class to proper place.
+ *
+ * @param label Label for this data point.
+ * @param weight The weight of this instance.
+ * @param features The vector of features for this data point.
+ */
+private[regression] case class Instance(label: Double, weight: Double, features: Vector)
 
 /**
  * :: Experimental ::
@@ -123,30 +131,43 @@ class LinearRegression(override val uid: String)
   def setTol(value: Double): this.type = set(tol, value)
   setDefault(tol -> 1E-6)
 
+  /**
+   * Whether to over-/under-sample training instances according to the given weights in weightCol.
+   * If empty, all instances are treated equally (weight 1.0).
+   * Default is empty, so all instances have weight one.
+   * @group setParam
+   */
+  def setWeightCol(value: String): this.type = set(weightCol, value)
+  setDefault(weightCol -> "")
+
   override protected def train(dataset: DataFrame): LinearRegressionModel = {
     // Extract columns from data.  If dataset is persisted, do not persist instances.
-    val instances = extractLabeledPoints(dataset).map {
-      case LabeledPoint(label: Double, features: Vector) => (label, features)
+    val w = if ($(weightCol).isEmpty) lit(1.0) else col($(weightCol))
+    val instances: RDD[Instance] = dataset.select(col($(labelCol)), w, col($(featuresCol))).map {
+      case Row(label: Double, weight: Double, features: Vector) =>
+        Instance(label, weight, features)
     }
+
     val handlePersistence = dataset.rdd.getStorageLevel == StorageLevel.NONE
     if (handlePersistence) instances.persist(StorageLevel.MEMORY_AND_DISK)
 
-    val (summarizer, statCounter) = instances.treeAggregate(
-      (new MultivariateOnlineSummarizer, new StatCounter))(
-        seqOp = (c, v) => (c, v) match {
-          case ((summarizer: MultivariateOnlineSummarizer, statCounter: StatCounter),
-          (label: Double, features: Vector)) =>
-            (summarizer.add(features), statCounter.merge(label))
-      },
-        combOp = (c1, c2) => (c1, c2) match {
-          case ((summarizer1: MultivariateOnlineSummarizer, statCounter1: StatCounter),
-          (summarizer2: MultivariateOnlineSummarizer, statCounter2: StatCounter)) =>
-            (summarizer1.merge(summarizer2), statCounter1.merge(statCounter2))
-      })
-
-    val numFeatures = summarizer.mean.size
-    val yMean = statCounter.mean
-    val yStd = math.sqrt(statCounter.variance)
+    val (featuresSummarizer, ySummarizer) = {
+      val seqOp = (c: (MultivariateOnlineSummarizer, MultivariateOnlineSummarizer),
+        instance: Instance) =>
+          (c._1.add(instance.features, instance.weight),
+            c._2.add(Vectors.dense(instance.label), instance.weight))
+
+      val combOp = (c1: (MultivariateOnlineSummarizer, MultivariateOnlineSummarizer),
+        c2: (MultivariateOnlineSummarizer, MultivariateOnlineSummarizer)) =>
+          (c1._1.merge(c2._1), c1._2.merge(c2._2))
+
+      instances.treeAggregate(
+        new MultivariateOnlineSummarizer, new MultivariateOnlineSummarizer)(seqOp, combOp)
+    }
+
+    val numFeatures = featuresSummarizer.mean.size
+    val yMean = ySummarizer.mean(0)
+    val yStd = math.sqrt(ySummarizer.variance(0))
 
     // If the yStd is zero, then the intercept is yMean with zero weights;
     // as a result, training is not needed.
@@ -167,8 +188,8 @@ class LinearRegression(override val uid: String)
       return copyValues(model.setSummary(trainingSummary))
     }
 
-    val featuresMean = summarizer.mean.toArray
-    val featuresStd = summarizer.variance.toArray.map(math.sqrt)
+    val featuresMean = featuresSummarizer.mean.toArray
+    val featuresStd = featuresSummarizer.variance.toArray.map(math.sqrt)
 
     // Since we implicitly do the feature scaling when we compute the cost function
     // to improve the convergence, the effective regParam will be changed.
@@ -318,7 +339,8 @@ class LinearRegressionModel private[ml] (
 
 /**
  * :: Experimental ::
- * Linear regression training results.
+ * Linear regression training results. Currently, the training summary ignores the
+ * training weights except for the objective trace.
  * @param predictions predictions outputted by the model's `transform` method.
  * @param objectiveHistory objective function (scaled loss + regularization) at each iteration.
  */
@@ -477,7 +499,7 @@ class LinearRegressionSummary private[regression] (
  * \frac{\partial L}{\partial\w_i} = 1/N ((\sum_j diff_j x_{ij} / \hat{x_i})
  * }}},
  *
- * @param weights The weights/coefficients corresponding to the features.
+ * @param coefficients The coefficients corresponding to the features.
  * @param labelStd The standard deviation value of the label.
  * @param labelMean The mean value of the label.
  * @param fitIntercept Whether to fit an intercept term.
@@ -485,7 +507,7 @@ class LinearRegressionSummary private[regression] (
  * @param featuresMean The mean values of the features.
  */
 private class LeastSquaresAggregator(
-    weights: Vector,
+    coefficients: Vector,
     labelStd: Double,
     labelMean: Double,
     fitIntercept: Boolean,
@@ -493,26 +515,28 @@ private class LeastSquaresAggregator(
     featuresMean: Array[Double]) extends Serializable {
 
   private var totalCnt: Long = 0L
+  private var weightSum: Double = 0.0
   private var lossSum = 0.0
 
-  private val (effectiveWeightsArray: Array[Double], offset: Double, dim: Int) = {
-    val weightsArray = weights.toArray.clone()
+  private val (effectiveCoefficientsArray: Array[Double], offset: Double, dim: Int) = {
+    val coefficientsArray = coefficients.toArray.clone()
     var sum = 0.0
     var i = 0
-    val len = weightsArray.length
+    val len = coefficientsArray.length
     while (i < len) {
       if (featuresStd(i) != 0.0) {
-        weightsArray(i) /=  featuresStd(i)
-        sum += weightsArray(i) * featuresMean(i)
+        coefficientsArray(i) /=  featuresStd(i)
+        sum += coefficientsArray(i) * featuresMean(i)
       } else {
-        weightsArray(i) = 0.0
+        coefficientsArray(i) = 0.0
       }
       i += 1
     }
-    (weightsArray, if (fitIntercept) labelMean / labelStd - sum else 0.0, weightsArray.length)
+    val offset = if (fitIntercept) labelMean / labelStd - sum else 0.0
+    (coefficientsArray, offset, coefficientsArray.length)
   }
 
-  private val effectiveWeightsVector = Vectors.dense(effectiveWeightsArray)
+  private val effectiveCoefficientsVector = Vectors.dense(effectiveCoefficientsArray)
 
   private val gradientSumArray = Array.ofDim[Double](dim)
 
@@ -520,30 +544,33 @@ private class LeastSquaresAggregator(
    * Add a new training data to this LeastSquaresAggregator, and update the loss and gradient
    * of the objective function.
    *
-   * @param label The label for this data point.
-   * @param data The features for one data point in dense/sparse vector format to be added
-   *             into this aggregator.
+   * @param instance  The data point instance to be added.
    * @return This LeastSquaresAggregator object.
    */
-  def add(label: Double, data: Vector): this.type = {
-    require(dim == data.size, s"Dimensions mismatch when adding new sample." +
-      s" Expecting $dim but got ${data.size}.")
+  def add(instance: Instance): this.type =
+    instance match { case Instance(label, weight, features) =>
+      require(dim == features.size, s"Dimensions mismatch when adding new sample." +
+        s" Expecting $dim but got ${features.size}.")
+      require(weight >= 0.0, s"instance weight, ${weight} has to be >= 0.0")
 
-    val diff = dot(data, effectiveWeightsVector) - label / labelStd + offset
+      if (weight == 0.0) return this
 
-    if (diff != 0) {
-      val localGradientSumArray = gradientSumArray
-      data.foreachActive { (index, value) =>
-        if (featuresStd(index) != 0.0 && value != 0.0) {
-          localGradientSumArray(index) += diff * value / featuresStd(index)
+      val diff = dot(features, effectiveCoefficientsVector) - label / labelStd + offset
+
+      if (diff != 0) {
+        val localGradientSumArray = gradientSumArray
+        features.foreachActive { (index, value) =>
+          if (featuresStd(index) != 0.0 && value != 0.0) {
+            localGradientSumArray(index) += weight * diff * value / featuresStd(index)
+          }
         }
+        lossSum += weight * diff * diff / 2.0
       }
-      lossSum += diff * diff / 2.0
-    }
 
-    totalCnt += 1
-    this
-  }
+      totalCnt += 1
+      weightSum += weight
+      this
+    }
 
   /**
    * Merge another LeastSquaresAggregator, and update the loss and gradient
@@ -557,8 +584,9 @@ private class LeastSquaresAggregator(
     require(dim == other.dim, s"Dimensions mismatch when merging with another " +
       s"LeastSquaresAggregator. Expecting $dim but got ${other.dim}.")
 
-    if (other.totalCnt != 0) {
+    if (other.weightSum != 0) {
       totalCnt += other.totalCnt
+      weightSum += other.weightSum
       lossSum += other.lossSum
 
       var i = 0
@@ -574,11 +602,17 @@ private class LeastSquaresAggregator(
 
   def count: Long = totalCnt
 
-  def loss: Double = lossSum / totalCnt
+  def loss: Double = {
+    require(weightSum > 0.0, s"The effective number of instances should be " +
+      s"greater than 0.0, but $weightSum.")
+    lossSum / weightSum
+  }
 
   def gradient: Vector = {
+    require(weightSum > 0.0, s"The effective number of instances should be " +
+      s"greater than 0.0, but $weightSum.")
     val result = Vectors.dense(gradientSumArray.clone())
-    scal(1.0 / totalCnt, result)
+    scal(1.0 / weightSum, result)
     result
   }
 }
@@ -589,7 +623,7 @@ private class LeastSquaresAggregator(
  * It's used in Breeze's convex optimization routines.
  */
 private class LeastSquaresCostFun(
-    data: RDD[(Double, Vector)],
+    data: RDD[Instance],
     labelStd: Double,
     labelMean: Double,
     fitIntercept: Boolean,
@@ -598,17 +632,13 @@ private class LeastSquaresCostFun(
     featuresMean: Array[Double],
     effectiveL2regParam: Double) extends DiffFunction[BDV[Double]] {
 
-  override def calculate(weights: BDV[Double]): (Double, BDV[Double]) = {
-    val w = Vectors.fromBreeze(weights)
+  override def calculate(coefficients: BDV[Double]): (Double, BDV[Double]) = {
+    val coeff = Vectors.fromBreeze(coefficients)
 
-    val leastSquaresAggregator = data.treeAggregate(new LeastSquaresAggregator(w, labelStd,
+    val leastSquaresAggregator = data.treeAggregate(new LeastSquaresAggregator(coeff, labelStd,
       labelMean, fitIntercept, featuresStd, featuresMean))(
-        seqOp = (c, v) => (c, v) match {
-          case (aggregator, (label, features)) => aggregator.add(label, features)
-        },
-        combOp = (c1, c2) => (c1, c2) match {
-          case (aggregator1, aggregator2) => aggregator1.merge(aggregator2)
-        })
+        seqOp = (aggregator, instance) => aggregator.add(instance),
+        combOp = (aggregator1, aggregator2) => aggregator1.merge(aggregator2))
 
     val totalGradientArray = leastSquaresAggregator.gradient.toArray
 
@@ -616,7 +646,7 @@ private class LeastSquaresCostFun(
       0.0
     } else {
       var sum = 0.0
-      w.foreachActive { (index, value) =>
+      coeff.foreachActive { (index, value) =>
         // The following code will compute the loss of the regularization; also
         // the gradient of the regularization, and add back to totalGradientArray.
         sum += {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 2aaee71ecc73..8428f4f00b37 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -17,10 +17,13 @@
 
 package org.apache.spark.ml.regression
 
+import scala.util.Random
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
 import org.apache.spark.mllib.linalg.{DenseVector, Vectors}
+import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.{LinearDataGenerator, MLlibTestSparkContext}
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row}
@@ -510,4 +513,89 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       .zip(testSummary.residuals.select("residuals").collect())
       .forall { case (Row(r1: Double), Row(r2: Double)) => r1 ~== r2 relTol 1E-5 }
   }
+
+  test("linear regression with weighted samples"){
+    val (data, weightedData) = {
+      val activeData = LinearDataGenerator.generateLinearInput(
+        6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
+
+      val rnd = new Random(8392)
+      val signedData = activeData.map { case p: LabeledPoint =>
+        (rnd.nextGaussian() > 0.0, p)
+      }
+
+      val data1 = signedData.flatMap {
+        case (true, p) => Iterator(p, p)
+        case (false, p) => Iterator(p)
+      }
+
+      val weightedSignedData = signedData.flatMap {
+        case (true, LabeledPoint(label, features)) =>
+          Iterator(
+            Instance(label, weight = 1.2, features),
+            Instance(label, weight = 0.8, features)
+          )
+        case (false, LabeledPoint(label, features)) =>
+          Iterator(
+            Instance(label, weight = 0.3, features),
+            Instance(label, weight = 0.1, features),
+            Instance(label, weight = 0.6, features)
+          )
+      }
+
+      val noiseData = LinearDataGenerator.generateLinearInput(
+        2, Array(1, 3), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
+      val weightedNoiseData = noiseData.map {
+        case LabeledPoint(label, features) => Instance(label, weight = 0, features)
+      }
+      val data2 = weightedSignedData ++ weightedNoiseData
+
+      (sqlContext.createDataFrame(sc.parallelize(data1, 4)),
+        sqlContext.createDataFrame(sc.parallelize(data2, 4)))
+    }
+
+    val trainer1a = (new LinearRegression).setFitIntercept(true)
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
+    val trainer1b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
+    val model1a0 = trainer1a.fit(data)
+    val model1a1 = trainer1a.fit(weightedData)
+    val model1b = trainer1b.fit(weightedData)
+    assert(model1a0.weights !~= model1a1.weights absTol 1E-3)
+    assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
+    assert(model1a0.weights ~== model1b.weights absTol 1E-3)
+    assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
+
+    val trainer2a = (new LinearRegression).setFitIntercept(true)
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
+    val trainer2b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
+    val model2a0 = trainer2a.fit(data)
+    val model2a1 = trainer2a.fit(weightedData)
+    val model2b = trainer2b.fit(weightedData)
+    assert(model2a0.weights !~= model2a1.weights absTol 1E-3)
+    assert(model2a0.intercept !~= model2a1.intercept absTol 1E-3)
+    assert(model2a0.weights ~== model2b.weights absTol 1E-3)
+    assert(model2a0.intercept ~== model2b.intercept absTol 1E-3)
+
+    val trainer3a = (new LinearRegression).setFitIntercept(false)
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
+    val trainer3b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
+    val model3a0 = trainer3a.fit(data)
+    val model3a1 = trainer3a.fit(weightedData)
+    val model3b = trainer3b.fit(weightedData)
+    assert(model3a0.weights !~= model3a1.weights absTol 1E-3)
+    assert(model3a0.weights ~== model3b.weights absTol 1E-3)
+
+    val trainer4a = (new LinearRegression).setFitIntercept(false)
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
+    val trainer4b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
+      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
+    val model4a0 = trainer4a.fit(data)
+    val model4a1 = trainer4a.fit(weightedData)
+    val model4b = trainer4b.fit(weightedData)
+    assert(model4a0.weights !~= model4a1.weights absTol 1E-3)
+    assert(model4a0.weights ~== model4b.weights absTol 1E-3)
+  }
 }
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 814a11e588ce..b2e6be706637 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -70,10 +70,14 @@ object MimaExcludes {
           "org.apache.spark.scheduler.AskPermissionToCommitOutput.this"),
         ProblemFilters.exclude[IncompatibleMethTypeProblem](
           "org.apache.spark.scheduler.AskPermissionToCommitOutput.apply")
-      ) ++
-      Seq(
+      ) ++ Seq(
         ProblemFilters.exclude[MissingClassProblem](
           "org.apache.spark.shuffle.FileShuffleBlockResolver$ShuffleFileGroup")
+      ) ++ Seq(
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.ml.regression.LeastSquaresAggregator.add"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.ml.regression.LeastSquaresCostFun.this")
       )
     case v if v.startsWith("1.5") =>
       Seq(

From b78c65b03ae87a3ba348c9d29ff4c296349eb49c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?hushan=5B=E8=83=A1=E7=8F=8A=5D?= <hushan@xiaomi.com>
Date: Mon, 21 Sep 2015 14:26:15 -0500
Subject: [PATCH 048/896] [SPARK-5259] [CORE] don't submit stage until its
 dependencies map outputs are registered
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Track pending tasks by partition ID instead of Task objects.

Before this change, failure & retry could result in a case where a stage got submitted before the map output from its dependencies get registered.  This was due to an error in the condition for registering map outputs.

Author: hushan[胡珊] <hushan@xiaomi.com>
Author: Imran Rashid <irashid@cloudera.com>

Closes #7699 from squito/SPARK-5259.
---
 .../apache/spark/scheduler/DAGScheduler.scala |  12 +-
 .../org/apache/spark/scheduler/Stage.scala    |   2 +-
 .../spark/scheduler/TaskSetManager.scala      |   4 +-
 .../spark/scheduler/DAGSchedulerSuite.scala   | 197 ++++++++++++++++--
 4 files changed, 191 insertions(+), 24 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 3c9a66e50440..394228b2728d 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -944,7 +944,7 @@ class DAGScheduler(
   private def submitMissingTasks(stage: Stage, jobId: Int) {
     logDebug("submitMissingTasks(" + stage + ")")
     // Get our pending tasks and remember them in our pendingTasks entry
-    stage.pendingTasks.clear()
+    stage.pendingPartitions.clear()
 
     // First figure out the indexes of partition ids to compute.
     val (allPartitions: Seq[Int], partitionsToCompute: Seq[Int]) = {
@@ -1060,8 +1060,8 @@ class DAGScheduler(
 
     if (tasks.size > 0) {
       logInfo("Submitting " + tasks.size + " missing tasks from " + stage + " (" + stage.rdd + ")")
-      stage.pendingTasks ++= tasks
-      logDebug("New pending tasks: " + stage.pendingTasks)
+      stage.pendingPartitions ++= tasks.map(_.partitionId)
+      logDebug("New pending partitions: " + stage.pendingPartitions)
       taskScheduler.submitTasks(new TaskSet(
         tasks.toArray, stage.id, stage.latestInfo.attemptId, stage.firstJobId, properties))
       stage.latestInfo.submissionTime = Some(clock.getTimeMillis())
@@ -1152,7 +1152,7 @@ class DAGScheduler(
       case Success =>
         listenerBus.post(SparkListenerTaskEnd(stageId, stage.latestInfo.attemptId, taskType,
           event.reason, event.taskInfo, event.taskMetrics))
-        stage.pendingTasks -= task
+        stage.pendingPartitions -= task.partitionId
         task match {
           case rt: ResultTask[_, _] =>
             // Cast to ResultStage here because it's part of the ResultTask
@@ -1198,7 +1198,7 @@ class DAGScheduler(
               shuffleStage.addOutputLoc(smt.partitionId, status)
             }
 
-            if (runningStages.contains(shuffleStage) && shuffleStage.pendingTasks.isEmpty) {
+            if (runningStages.contains(shuffleStage) && shuffleStage.pendingPartitions.isEmpty) {
               markStageAsFinished(shuffleStage)
               logInfo("looking for newly runnable stages")
               logInfo("running: " + runningStages)
@@ -1242,7 +1242,7 @@ class DAGScheduler(
 
       case Resubmitted =>
         logInfo("Resubmitted " + task + ", so marking it as still running")
-        stage.pendingTasks += task
+        stage.pendingPartitions += task.partitionId
 
       case FetchFailed(bmAddress, shuffleId, mapId, reduceId, failureMessage) =>
         val failedStage = stageIdToStage(task.stageId)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
index b37eccbd0f7b..a3829c319c48 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
@@ -66,7 +66,7 @@ private[scheduler] abstract class Stage(
   /** Set of jobs that this stage belongs to. */
   val jobIds = new HashSet[Int]
 
-  var pendingTasks = new HashSet[Task[_]]
+  val pendingPartitions = new HashSet[Int]
 
   /** The ID to use for the next new attempt for this stage. */
   private var nextAttemptId: Int = 0
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
index 62af9031b9f8..c02597c4365c 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
@@ -487,8 +487,8 @@ private[spark] class TaskSetManager(
           // a good proxy to task serialization time.
           // val timeTaken = clock.getTime() - startTime
           val taskName = s"task ${info.id} in stage ${taskSet.id}"
-          logInfo("Starting %s (TID %d, %s, %s, %d bytes)".format(
-              taskName, taskId, host, taskLocality, serializedTask.limit))
+          logInfo(s"Starting $taskName (TID $taskId, $host, partition ${task.partitionId}," +
+            s"$taskLocality, ${serializedTask.limit} bytes)")
 
           sched.dagScheduler.taskStarted(task, info)
           return Some(new TaskDescription(taskId = taskId, attemptNumber = attemptNum, execId,
diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 1c55f90ad9b4..6b5bcf0574de 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -479,8 +479,8 @@ class DAGSchedulerSuite
     val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
     submit(reduceRdd, Array(0, 1))
     complete(taskSets(0), Seq(
-        (Success, makeMapStatus("hostA", reduceRdd.partitions.size)),
-        (Success, makeMapStatus("hostB", reduceRdd.partitions.size))))
+        (Success, makeMapStatus("hostA", reduceRdd.partitions.length)),
+        (Success, makeMapStatus("hostB", reduceRdd.partitions.length))))
     // the 2nd ResultTask failed
     complete(taskSets(1), Seq(
         (Success, 42),
@@ -490,7 +490,7 @@ class DAGSchedulerSuite
     // ask the scheduler to try it again
     scheduler.resubmitFailedStages()
     // have the 2nd attempt pass
-    complete(taskSets(2), Seq((Success, makeMapStatus("hostA", reduceRdd.partitions.size))))
+    complete(taskSets(2), Seq((Success, makeMapStatus("hostA", reduceRdd.partitions.length))))
     // we can see both result blocks now
     assert(mapOutputTracker.getMapSizesByExecutorId(shuffleId, 0).map(_._1.host).toSet ===
       HashSet("hostA", "hostB"))
@@ -782,8 +782,8 @@ class DAGSchedulerSuite
     val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
     submit(reduceRdd, Array(0, 1))
     complete(taskSets(0), Seq(
-      (Success, makeMapStatus("hostA", reduceRdd.partitions.size)),
-      (Success, makeMapStatus("hostB", reduceRdd.partitions.size))))
+      (Success, makeMapStatus("hostA", reduceRdd.partitions.length)),
+      (Success, makeMapStatus("hostB", reduceRdd.partitions.length))))
     // The MapOutputTracker should know about both map output locations.
     assert(mapOutputTracker.getMapSizesByExecutorId(shuffleId, 0).map(_._1.host).toSet ===
       HashSet("hostA", "hostB"))
@@ -1035,6 +1035,173 @@ class DAGSchedulerSuite
     assertDataStructuresEmpty()
   }
 
+  /**
+   * This test runs a three stage job, with a fetch failure in stage 1.  but during the retry, we
+   * have completions from both the first & second attempt of stage 1.  So all the map output is
+   * available before we finish any task set for stage 1.  We want to make sure that we don't
+   * submit stage 2 until the map output for stage 1 is registered
+   */
+  test("don't submit stage until its dependencies map outputs are registered (SPARK-5259)") {
+    val firstRDD = new MyRDD(sc, 3, Nil)
+    val firstShuffleDep = new ShuffleDependency(firstRDD, null)
+    val firstShuffleId = firstShuffleDep.shuffleId
+    val shuffleMapRdd = new MyRDD(sc, 3, List(firstShuffleDep))
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    submit(reduceRdd, Array(0))
+
+    // things start out smoothly, stage 0 completes with no issues
+    complete(taskSets(0), Seq(
+      (Success, makeMapStatus("hostB", shuffleMapRdd.partitions.length)),
+      (Success, makeMapStatus("hostB", shuffleMapRdd.partitions.length)),
+      (Success, makeMapStatus("hostA", shuffleMapRdd.partitions.length))
+    ))
+
+    // then one executor dies, and a task fails in stage 1
+    runEvent(ExecutorLost("exec-hostA"))
+    runEvent(CompletionEvent(
+      taskSets(1).tasks(0),
+      FetchFailed(null, firstShuffleId, 2, 0, "Fetch failed"),
+      null,
+      null,
+      createFakeTaskInfo(),
+      null))
+
+    // so we resubmit stage 0, which completes happily
+    scheduler.resubmitFailedStages()
+    val stage0Resubmit = taskSets(2)
+    assert(stage0Resubmit.stageId == 0)
+    assert(stage0Resubmit.stageAttemptId === 1)
+    val task = stage0Resubmit.tasks(0)
+    assert(task.partitionId === 2)
+    runEvent(CompletionEvent(
+      task,
+      Success,
+      makeMapStatus("hostC", shuffleMapRdd.partitions.length),
+      null,
+      createFakeTaskInfo(),
+      null))
+
+    // now here is where things get tricky : we will now have a task set representing
+    // the second attempt for stage 1, but we *also* have some tasks for the first attempt for
+    // stage 1 still going
+    val stage1Resubmit = taskSets(3)
+    assert(stage1Resubmit.stageId == 1)
+    assert(stage1Resubmit.stageAttemptId === 1)
+    assert(stage1Resubmit.tasks.length === 3)
+
+    // we'll have some tasks finish from the first attempt, and some finish from the second attempt,
+    // so that we actually have all stage outputs, though no attempt has completed all its
+    // tasks
+    runEvent(CompletionEvent(
+      taskSets(3).tasks(0),
+      Success,
+      makeMapStatus("hostC", reduceRdd.partitions.length),
+      null,
+      createFakeTaskInfo(),
+      null))
+    runEvent(CompletionEvent(
+      taskSets(3).tasks(1),
+      Success,
+      makeMapStatus("hostC", reduceRdd.partitions.length),
+      null,
+      createFakeTaskInfo(),
+      null))
+    // late task finish from the first attempt
+    runEvent(CompletionEvent(
+      taskSets(1).tasks(2),
+      Success,
+      makeMapStatus("hostB", reduceRdd.partitions.length),
+      null,
+      createFakeTaskInfo(),
+      null))
+
+    // What should happen now is that we submit stage 2.  However, we might not see an error
+    // b/c of DAGScheduler's error handling (it tends to swallow errors and just log them).  But
+    // we can check some conditions.
+    // Note that the really important thing here is not so much that we submit stage 2 *immediately*
+    // but that we don't end up with some error from these interleaved completions.  It would also
+    // be OK (though sub-optimal) if stage 2 simply waited until the resubmission of stage 1 had
+    // all its tasks complete
+
+    // check that we have all the map output for stage 0 (it should have been there even before
+    // the last round of completions from stage 1, but just to double check it hasn't been messed
+    // up) and also the newly available stage 1
+    val stageToReduceIdxs = Seq(
+      0 -> (0 until 3),
+      1 -> (0 until 1)
+    )
+    for {
+      (stage, reduceIdxs) <- stageToReduceIdxs
+      reduceIdx <- reduceIdxs
+    } {
+      // this would throw an exception if the map status hadn't been registered
+      val statuses = mapOutputTracker.getMapSizesByExecutorId(stage, reduceIdx)
+      // really we should have already thrown an exception rather than fail either of these
+      // asserts, but just to be extra defensive let's double check the statuses are OK
+      assert(statuses != null)
+      assert(statuses.nonEmpty)
+    }
+
+    // and check that stage 2 has been submitted
+    assert(taskSets.size == 5)
+    val stage2TaskSet = taskSets(4)
+    assert(stage2TaskSet.stageId == 2)
+    assert(stage2TaskSet.stageAttemptId == 0)
+  }
+
+  /**
+   * We lose an executor after completing some shuffle map tasks on it.  Those tasks get
+   * resubmitted, and when they finish the job completes normally
+   */
+  test("register map outputs correctly after ExecutorLost and task Resubmitted") {
+    val firstRDD = new MyRDD(sc, 3, Nil)
+    val firstShuffleDep = new ShuffleDependency(firstRDD, null)
+    val reduceRdd = new MyRDD(sc, 5, List(firstShuffleDep))
+    submit(reduceRdd, Array(0))
+
+    // complete some of the tasks from the first stage, on one host
+    runEvent(CompletionEvent(
+      taskSets(0).tasks(0), Success,
+      makeMapStatus("hostA", reduceRdd.partitions.length), null, createFakeTaskInfo(), null))
+    runEvent(CompletionEvent(
+      taskSets(0).tasks(1), Success,
+      makeMapStatus("hostA", reduceRdd.partitions.length), null, createFakeTaskInfo(), null))
+
+    // now that host goes down
+    runEvent(ExecutorLost("exec-hostA"))
+
+    // so we resubmit those tasks
+    runEvent(CompletionEvent(
+      taskSets(0).tasks(0), Resubmitted, null, null, createFakeTaskInfo(), null))
+    runEvent(CompletionEvent(
+      taskSets(0).tasks(1), Resubmitted, null, null, createFakeTaskInfo(), null))
+
+    // now complete everything on a different host
+    complete(taskSets(0), Seq(
+      (Success, makeMapStatus("hostB", reduceRdd.partitions.length)),
+      (Success, makeMapStatus("hostB", reduceRdd.partitions.length)),
+      (Success, makeMapStatus("hostB", reduceRdd.partitions.length))
+    ))
+
+    // now we should submit stage 1, and the map output from stage 0 should be registered
+
+    // check that we have all the map output for stage 0
+    (0 until reduceRdd.partitions.length).foreach { reduceIdx =>
+      val statuses = mapOutputTracker.getMapSizesByExecutorId(0, reduceIdx)
+      // really we should have already thrown an exception rather than fail either of these
+      // asserts, but just to be extra defensive let's double check the statuses are OK
+      assert(statuses != null)
+      assert(statuses.nonEmpty)
+    }
+
+    // and check that stage 1 has been submitted
+    assert(taskSets.size == 2)
+    val stage1TaskSet = taskSets(1)
+    assert(stage1TaskSet.stageId == 1)
+    assert(stage1TaskSet.stageAttemptId == 0)
+  }
+
   /**
    * Makes sure that failures of stage used by multiple jobs are correctly handled.
    *
@@ -1393,8 +1560,8 @@ class DAGSchedulerSuite
     // Submit a map stage by itself
     submitMapStage(shuffleDep)
     complete(taskSets(0), Seq(
-      (Success, makeMapStatus("hostA", reduceRdd.partitions.size)),
-      (Success, makeMapStatus("hostB", reduceRdd.partitions.size))))
+      (Success, makeMapStatus("hostA", reduceRdd.partitions.length)),
+      (Success, makeMapStatus("hostB", reduceRdd.partitions.length))))
     assert(results.size === 1)
     results.clear()
     assertDataStructuresEmpty()
@@ -1407,7 +1574,7 @@ class DAGSchedulerSuite
     // Ask the scheduler to try it again; TaskSet 2 will rerun the map task that we couldn't fetch
     // from, then TaskSet 3 will run the reduce stage
     scheduler.resubmitFailedStages()
-    complete(taskSets(2), Seq((Success, makeMapStatus("hostA", reduceRdd.partitions.size))))
+    complete(taskSets(2), Seq((Success, makeMapStatus("hostA", reduceRdd.partitions.length))))
     complete(taskSets(3), Seq((Success, 43)))
     assert(results === Map(0 -> 42, 1 -> 43))
     results.clear()
@@ -1452,8 +1619,8 @@ class DAGSchedulerSuite
     // Complete the first stage
     assert(taskSets(0).stageId === 0)
     complete(taskSets(0), Seq(
-      (Success, makeMapStatus("hostA", rdd1.partitions.size)),
-      (Success, makeMapStatus("hostB", rdd1.partitions.size))))
+      (Success, makeMapStatus("hostA", rdd1.partitions.length)),
+      (Success, makeMapStatus("hostB", rdd1.partitions.length))))
     assert(mapOutputTracker.getMapSizesByExecutorId(dep1.shuffleId, 0).map(_._1).toSet ===
       HashSet(makeBlockManagerId("hostA"), makeBlockManagerId("hostB")))
     assert(listener1.results.size === 1)
@@ -1461,7 +1628,7 @@ class DAGSchedulerSuite
     // When attempting the second stage, show a fetch failure
     assert(taskSets(1).stageId === 1)
     complete(taskSets(1), Seq(
-      (Success, makeMapStatus("hostA", rdd2.partitions.size)),
+      (Success, makeMapStatus("hostA", rdd2.partitions.length)),
       (FetchFailed(makeBlockManagerId("hostA"), dep1.shuffleId, 0, 0, "ignored"), null)))
     scheduler.resubmitFailedStages()
     assert(listener2.results.size === 0)    // Second stage listener should not have a result yet
@@ -1469,7 +1636,7 @@ class DAGSchedulerSuite
     // Stage 0 should now be running as task set 2; make its task succeed
     assert(taskSets(2).stageId === 0)
     complete(taskSets(2), Seq(
-      (Success, makeMapStatus("hostC", rdd2.partitions.size))))
+      (Success, makeMapStatus("hostC", rdd2.partitions.length))))
     assert(mapOutputTracker.getMapSizesByExecutorId(dep1.shuffleId, 0).map(_._1).toSet ===
       HashSet(makeBlockManagerId("hostC"), makeBlockManagerId("hostB")))
     assert(listener2.results.size === 0)    // Second stage listener should still not have a result
@@ -1477,8 +1644,8 @@ class DAGSchedulerSuite
     // Stage 1 should now be running as task set 3; make its first task succeed
     assert(taskSets(3).stageId === 1)
     complete(taskSets(3), Seq(
-      (Success, makeMapStatus("hostB", rdd2.partitions.size)),
-      (Success, makeMapStatus("hostD", rdd2.partitions.size))))
+      (Success, makeMapStatus("hostB", rdd2.partitions.length)),
+      (Success, makeMapStatus("hostD", rdd2.partitions.length))))
     assert(mapOutputTracker.getMapSizesByExecutorId(dep2.shuffleId, 0).map(_._1).toSet ===
       HashSet(makeBlockManagerId("hostB"), makeBlockManagerId("hostD")))
     assert(listener2.results.size === 1)
@@ -1494,7 +1661,7 @@ class DAGSchedulerSuite
     // TaskSet 5 will rerun stage 1's lost task, then TaskSet 6 will rerun stage 2
     assert(taskSets(5).stageId === 1)
     complete(taskSets(5), Seq(
-      (Success, makeMapStatus("hostE", rdd2.partitions.size))))
+      (Success, makeMapStatus("hostE", rdd2.partitions.length))))
     complete(taskSets(6), Seq(
       (Success, 53)))
     assert(listener3.results === Map(0 -> 52, 1 -> 53))

From ba882db6f43dd2bc05675133158e4664ed07030a Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Mon, 21 Sep 2015 13:06:23 -0700
Subject: [PATCH 049/896] [SPARK-9769] [ML] [PY] add python api for
 countvectorizermodel

From JIRA: Add Python API, user guide and example for ml.feature.CountVectorizerModel

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8561 from holdenk/SPARK-9769-add-python-api-for-countvectorizermodel.
---
 python/pyspark/ml/feature.py | 148 +++++++++++++++++++++++++++++++++--
 1 file changed, 142 insertions(+), 6 deletions(-)

diff --git a/python/pyspark/ml/feature.py b/python/pyspark/ml/feature.py
index 92db8df80280..f41d72f87725 100644
--- a/python/pyspark/ml/feature.py
+++ b/python/pyspark/ml/feature.py
@@ -26,12 +26,13 @@
 from pyspark.mllib.common import inherit_doc
 from pyspark.mllib.linalg import _convert_to_vector
 
-__all__ = ['Binarizer', 'Bucketizer', 'DCT', 'ElementwiseProduct', 'HashingTF', 'IDF', 'IDFModel',
-           'IndexToString', 'MinMaxScaler', 'MinMaxScalerModel', 'NGram', 'Normalizer',
-           'OneHotEncoder', 'PCA', 'PCAModel', 'PolynomialExpansion', 'RegexTokenizer',
-           'RFormula', 'RFormulaModel', 'SQLTransformer', 'StandardScaler', 'StandardScalerModel',
-           'StopWordsRemover', 'StringIndexer', 'StringIndexerModel', 'Tokenizer',
-           'VectorAssembler', 'VectorIndexer', 'VectorSlicer', 'Word2Vec', 'Word2VecModel']
+__all__ = ['Binarizer', 'Bucketizer', 'CountVectorizer', 'CountVectorizerModel', 'DCT',
+           'ElementwiseProduct', 'HashingTF', 'IDF', 'IDFModel', 'IndexToString', 'MinMaxScaler',
+           'MinMaxScalerModel', 'NGram', 'Normalizer', 'OneHotEncoder', 'PCA', 'PCAModel',
+           'PolynomialExpansion', 'RegexTokenizer', 'RFormula', 'RFormulaModel', 'SQLTransformer',
+           'StandardScaler', 'StandardScalerModel', 'StopWordsRemover', 'StringIndexer',
+           'StringIndexerModel', 'Tokenizer', 'VectorAssembler', 'VectorIndexer', 'VectorSlicer',
+           'Word2Vec', 'Word2VecModel']
 
 
 @inherit_doc
@@ -171,6 +172,141 @@ def getSplits(self):
         return self.getOrDefault(self.splits)
 
 
+@inherit_doc
+class CountVectorizer(JavaEstimator, HasInputCol, HasOutputCol):
+    """
+    .. note:: Experimental
+
+    Extracts a vocabulary from document collections and generates a :py:attr:`CountVectorizerModel`.
+    >>> df = sqlContext.createDataFrame(
+    ...    [(0, ["a", "b", "c"]), (1, ["a", "b", "b", "c", "a"])],
+    ...    ["label", "raw"])
+    >>> cv = CountVectorizer(inputCol="raw", outputCol="vectors")
+    >>> model = cv.fit(df)
+    >>> model.transform(df).show(truncate=False)
+    +-----+---------------+-------------------------+
+    |label|raw            |vectors                  |
+    +-----+---------------+-------------------------+
+    |0    |[a, b, c]      |(3,[0,1,2],[1.0,1.0,1.0])|
+    |1    |[a, b, b, c, a]|(3,[0,1,2],[2.0,2.0,1.0])|
+    +-----+---------------+-------------------------+
+    ...
+    >>> sorted(map(str, model.vocabulary))
+    ['a', 'b', 'c']
+    """
+
+    # a placeholder to make it appear in the generated doc
+    minTF = Param(
+        Params._dummy(), "minTF", "Filter to ignore rare words in" +
+        " a document. For each document, terms with frequency/count less than the given" +
+        " threshold are ignored. If this is an integer >= 1, then this specifies a count (of" +
+        " times the term must appear in the document); if this is a double in [0,1), then this " +
+        "specifies a fraction (out of the document's token count). Note that the parameter is " +
+        "only used in transform of CountVectorizerModel and does not affect fitting. Default 1.0")
+    minDF = Param(
+        Params._dummy(), "minDF", "Specifies the minimum number of" +
+        " different documents a term must appear in to be included in the vocabulary." +
+        " If this is an integer >= 1, this specifies the number of documents the term must" +
+        " appear in; if this is a double in [0,1), then this specifies the fraction of documents." +
+        " Default 1.0")
+    vocabSize = Param(
+        Params._dummy(), "vocabSize", "max size of the vocabulary. Default 1 << 18.")
+
+    @keyword_only
+    def __init__(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None):
+        """
+        __init__(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None)
+        """
+        super(CountVectorizer, self).__init__()
+        self._java_obj = self._new_java_obj("org.apache.spark.ml.feature.CountVectorizer",
+                                            self.uid)
+        self.minTF = Param(
+            self, "minTF", "Filter to ignore rare words in" +
+            " a document. For each document, terms with frequency/count less than the given" +
+            " threshold are ignored. If this is an integer >= 1, then this specifies a count (of" +
+            " times the term must appear in the document); if this is a double in [0,1), then " +
+            "this specifies a fraction (out of the document's token count). Note that the " +
+            "parameter is only used in transform of CountVectorizerModel and does not affect" +
+            "fitting. Default 1.0")
+        self.minDF = Param(
+            self, "minDF", "Specifies the minimum number of" +
+            " different documents a term must appear in to be included in the vocabulary." +
+            " If this is an integer >= 1, this specifies the number of documents the term must" +
+            " appear in; if this is a double in [0,1), then this specifies the fraction of " +
+            "documents. Default 1.0")
+        self.vocabSize = Param(
+            self, "vocabSize", "max size of the vocabulary. Default 1 << 18.")
+        self._setDefault(minTF=1.0, minDF=1.0, vocabSize=1 << 18)
+        kwargs = self.__init__._input_kwargs
+        self.setParams(**kwargs)
+
+    @keyword_only
+    def setParams(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None):
+        """
+        setParams(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None)
+        Set the params for the CountVectorizer
+        """
+        kwargs = self.setParams._input_kwargs
+        return self._set(**kwargs)
+
+    def setMinTF(self, value):
+        """
+        Sets the value of :py:attr:`minTF`.
+        """
+        self._paramMap[self.minTF] = value
+        return self
+
+    def getMinTF(self):
+        """
+        Gets the value of minTF or its default value.
+        """
+        return self.getOrDefault(self.minTF)
+
+    def setMinDF(self, value):
+        """
+        Sets the value of :py:attr:`minDF`.
+        """
+        self._paramMap[self.minDF] = value
+        return self
+
+    def getMinDF(self):
+        """
+        Gets the value of minDF or its default value.
+        """
+        return self.getOrDefault(self.minDF)
+
+    def setVocabSize(self, value):
+        """
+        Sets the value of :py:attr:`vocabSize`.
+        """
+        self._paramMap[self.vocabSize] = value
+        return self
+
+    def getVocabSize(self):
+        """
+        Gets the value of vocabSize or its default value.
+        """
+        return self.getOrDefault(self.vocabSize)
+
+    def _create_model(self, java_model):
+        return CountVectorizerModel(java_model)
+
+
+class CountVectorizerModel(JavaModel):
+    """
+    .. note:: Experimental
+
+    Model fitted by CountVectorizer.
+    """
+
+    @property
+    def vocabulary(self):
+        """
+        An array of terms in the vocabulary.
+        """
+        return self._call_java("vocabulary")
+
+
 @inherit_doc
 class DCT(JavaTransformer, HasInputCol, HasOutputCol):
     """

From aeef44a3e32b53f7adecc8e9cfd684fb4598e87d Mon Sep 17 00:00:00 2001
From: Feynman Liang <fliang@databricks.com>
Date: Mon, 21 Sep 2015 13:11:28 -0700
Subject: [PATCH 050/896] [SPARK-3147] [MLLIB] [STREAMING] Streaming 2-sample
 statistical significance testing

Implementation of significance testing using Streaming API.

Author: Feynman Liang <fliang@databricks.com>
Author: Feynman Liang <feynman.liang@gmail.com>

Closes #4716 from feynmanliang/ab_testing.
---
 .../examples/mllib/StreamingTestExample.scala |  90 +++++++
 .../spark/mllib/stat/test/StreamingTest.scala | 145 +++++++++++
 .../mllib/stat/test/StreamingTestMethod.scala | 167 ++++++++++++
 .../spark/mllib/stat/test/TestResult.scala    |  22 ++
 .../spark/mllib/stat/StreamingTestSuite.scala | 243 ++++++++++++++++++
 5 files changed, 667 insertions(+)
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/StreamingTestExample.scala
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTest.scala
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTestMethod.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/mllib/stat/StreamingTestSuite.scala

diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/StreamingTestExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/StreamingTestExample.scala
new file mode 100644
index 000000000000..ab29f90254d3
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/StreamingTestExample.scala
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.SparkConf
+import org.apache.spark.mllib.stat.test.StreamingTest
+import org.apache.spark.streaming.{Seconds, StreamingContext}
+import org.apache.spark.util.Utils
+
+/**
+ * Perform streaming testing using Welch's 2-sample t-test on a stream of data, where the data
+ * stream arrives as text files in a directory. Stops when the two groups are statistically
+ * significant (p-value < 0.05) or after a user-specified timeout in number of batches is exceeded.
+ *
+ * The rows of the text files must be in the form `Boolean, Double`. For example:
+ *   false, -3.92
+ *   true, 99.32
+ *
+ * Usage:
+ *   StreamingTestExample <dataDir> <batchDuration> <numBatchesTimeout>
+ *
+ * To run on your local machine using the directory `dataDir` with 5 seconds between each batch and
+ * a timeout after 100 insignificant batches, call:
+ *    $ bin/run-example mllib.StreamingTestExample dataDir 5 100
+ *
+ * As you add text files to `dataDir` the significance test wil continually update every
+ * `batchDuration` seconds until the test becomes significant (p-value < 0.05) or the number of
+ * batches processed exceeds `numBatchesTimeout`.
+ */
+object StreamingTestExample {
+
+  def main(args: Array[String]) {
+    if (args.length != 3) {
+      // scalastyle:off println
+      System.err.println(
+        "Usage: StreamingTestExample " +
+          "<dataDir> <batchDuration> <numBatchesTimeout>")
+      // scalastyle:on println
+      System.exit(1)
+    }
+    val dataDir = args(0)
+    val batchDuration = Seconds(args(1).toLong)
+    val numBatchesTimeout = args(2).toInt
+
+    val conf = new SparkConf().setMaster("local").setAppName("StreamingTestExample")
+    val ssc = new StreamingContext(conf, batchDuration)
+    ssc.checkpoint({
+      val dir = Utils.createTempDir()
+      dir.toString
+    })
+
+    val data = ssc.textFileStream(dataDir).map(line => line.split(",") match {
+      case Array(label, value) => (label.toBoolean, value.toDouble)
+    })
+
+    val streamingTest = new StreamingTest()
+      .setPeacePeriod(0)
+      .setWindowSize(0)
+      .setTestMethod("welch")
+
+    val out = streamingTest.registerStream(data)
+    out.print()
+
+    // Stop processing if test becomes significant or we time out
+    var timeoutCounter = numBatchesTimeout
+    out.foreachRDD { rdd =>
+      timeoutCounter -= 1
+      val anySignificant = rdd.map(_.pValue < 0.05).fold(false)(_ || _)
+      if (timeoutCounter == 0 || anySignificant) rdd.context.stop()
+    }
+
+    ssc.start()
+    ssc.awaitTermination()
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTest.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTest.scala
new file mode 100644
index 000000000000..75c6a51d0957
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTest.scala
@@ -0,0 +1,145 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.stat.test
+
+import org.apache.spark.Logging
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.streaming.dstream.DStream
+import org.apache.spark.util.StatCounter
+
+/**
+ * :: Experimental ::
+ * Performs online 2-sample significance testing for a stream of (Boolean, Double) pairs. The
+ * Boolean identifies which sample each observation comes from, and the Double is the numeric value
+ * of the observation.
+ *
+ * To address novelty affects, the `peacePeriod` specifies a set number of initial
+ * [[org.apache.spark.rdd.RDD]] batches of the [[DStream]] to be dropped from significance testing.
+ *
+ * The `windowSize` sets the number of batches each significance test is to be performed over. The
+ * window is sliding with a stride length of 1 batch. Setting windowSize to 0 will perform
+ * cumulative processing, using all batches seen so far.
+ *
+ * Different tests may be used for assessing statistical significance depending on assumptions
+ * satisfied by data. For more details, see [[StreamingTestMethod]]. The `testMethod` specifies
+ * which test will be used.
+ *
+ * Use a builder pattern to construct a streaming test in an application, for example:
+ * {{{
+ *   val model = new StreamingTest()
+ *     .setPeacePeriod(10)
+ *     .setWindowSize(0)
+ *     .setTestMethod("welch")
+ *     .registerStream(DStream)
+ * }}}
+ */
+@Experimental
+@Since("1.6.0")
+class StreamingTest @Since("1.6.0") () extends Logging with Serializable {
+  private var peacePeriod: Int = 0
+  private var windowSize: Int = 0
+  private var testMethod: StreamingTestMethod = WelchTTest
+
+  /** Set the number of initial batches to ignore. Default: 0. */
+  @Since("1.6.0")
+  def setPeacePeriod(peacePeriod: Int): this.type = {
+    this.peacePeriod = peacePeriod
+    this
+  }
+
+  /**
+   * Set the number of batches to compute significance tests over. Default: 0.
+   * A value of 0 will use all batches seen so far.
+   */
+  @Since("1.6.0")
+  def setWindowSize(windowSize: Int): this.type = {
+    this.windowSize = windowSize
+    this
+  }
+
+  /** Set the statistical method used for significance testing. Default: "welch" */
+  @Since("1.6.0")
+  def setTestMethod(method: String): this.type = {
+    this.testMethod = StreamingTestMethod.getTestMethodFromName(method)
+    this
+  }
+
+  /**
+   * Register a [[DStream]] of values for significance testing.
+   *
+   * @param data stream of (key,value) pairs where the key denotes group membership (true =
+   *             experiment, false = control) and the value is the numerical metric to test for
+   *             significance
+   * @return stream of significance testing results
+   */
+  @Since("1.6.0")
+  def registerStream(data: DStream[(Boolean, Double)]): DStream[StreamingTestResult] = {
+    val dataAfterPeacePeriod = dropPeacePeriod(data)
+    val summarizedData = summarizeByKeyAndWindow(dataAfterPeacePeriod)
+    val pairedSummaries = pairSummaries(summarizedData)
+
+    testMethod.doTest(pairedSummaries)
+  }
+
+  /** Drop all batches inside the peace period. */
+  private[stat] def dropPeacePeriod(
+      data: DStream[(Boolean, Double)]): DStream[(Boolean, Double)] = {
+    data.transform { (rdd, time) =>
+      if (time.milliseconds > data.slideDuration.milliseconds * peacePeriod) {
+        rdd
+      } else {
+        data.context.sparkContext.parallelize(Seq())
+      }
+    }
+  }
+
+  /** Compute summary statistics over each key and the specified test window size. */
+  private[stat] def summarizeByKeyAndWindow(
+      data: DStream[(Boolean, Double)]): DStream[(Boolean, StatCounter)] = {
+    if (this.windowSize == 0) {
+      data.updateStateByKey[StatCounter](
+        (newValues: Seq[Double], oldSummary: Option[StatCounter]) => {
+          val newSummary = oldSummary.getOrElse(new StatCounter())
+          newSummary.merge(newValues)
+          Some(newSummary)
+        })
+    } else {
+      val windowDuration = data.slideDuration * this.windowSize
+      data
+        .groupByKeyAndWindow(windowDuration)
+        .mapValues { values =>
+          val summary = new StatCounter()
+          values.foreach(value => summary.merge(value))
+          summary
+        }
+    }
+  }
+
+  /**
+   * Transform a stream of summaries into pairs representing summary statistics for control group
+   * and experiment group up to this batch.
+   */
+  private[stat] def pairSummaries(summarizedData: DStream[(Boolean, StatCounter)])
+      : DStream[(StatCounter, StatCounter)] = {
+    summarizedData
+      .map[(Int, StatCounter)](x => (0, x._2))
+      .groupByKey()  // should be length two (control/experiment group)
+      .map(x => (x._2.head, x._2.last))
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTestMethod.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTestMethod.scala
new file mode 100644
index 000000000000..a7eaed51b4d5
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/StreamingTestMethod.scala
@@ -0,0 +1,167 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.stat.test
+
+import java.io.Serializable
+
+import scala.language.implicitConversions
+import scala.math.pow
+
+import com.twitter.chill.MeatLocker
+import org.apache.commons.math3.stat.descriptive.StatisticalSummaryValues
+import org.apache.commons.math3.stat.inference.TTest
+
+import org.apache.spark.Logging
+import org.apache.spark.streaming.dstream.DStream
+import org.apache.spark.util.StatCounter
+
+/**
+ * Significance testing methods for [[StreamingTest]]. New 2-sample statistical significance tests
+ * should extend [[StreamingTestMethod]] and introduce a new entry in
+ * [[StreamingTestMethod.TEST_NAME_TO_OBJECT]]
+ */
+private[stat] sealed trait StreamingTestMethod extends Serializable {
+
+  val methodName: String
+  val nullHypothesis: String
+
+  protected type SummaryPairStream =
+    DStream[(StatCounter, StatCounter)]
+
+  /**
+   * Perform streaming 2-sample statistical significance testing.
+   *
+   * @param sampleSummaries stream pairs of summary statistics for the 2 samples
+   * @return stream of rest results
+   */
+  def doTest(sampleSummaries: SummaryPairStream): DStream[StreamingTestResult]
+
+  /**
+   * Implicit adapter to convert between streaming summary statistics type and the type required by
+   * the t-testing libraries.
+   */
+  protected implicit def toApacheCommonsStats(
+      summaryStats: StatCounter): StatisticalSummaryValues = {
+    new StatisticalSummaryValues(
+      summaryStats.mean,
+      summaryStats.variance,
+      summaryStats.count,
+      summaryStats.max,
+      summaryStats.min,
+      summaryStats.mean * summaryStats.count
+    )
+  }
+}
+
+/**
+ * Performs Welch's 2-sample t-test. The null hypothesis is that the two data sets have equal mean.
+ * This test does not assume equal variance between the two samples and does not assume equal
+ * sample size.
+ *
+ * @see http://en.wikipedia.org/wiki/Welch%27s_t_test
+ */
+private[stat] object WelchTTest extends StreamingTestMethod with Logging {
+
+  override final val methodName = "Welch's 2-sample t-test"
+  override final val nullHypothesis = "Both groups have same mean"
+
+  private final val tTester = MeatLocker(new TTest())
+
+  override def doTest(data: SummaryPairStream): DStream[StreamingTestResult] =
+    data.map[StreamingTestResult]((test _).tupled)
+
+  private def test(
+      statsA: StatCounter,
+      statsB: StatCounter): StreamingTestResult = {
+    def welchDF(sample1: StatisticalSummaryValues, sample2: StatisticalSummaryValues): Double = {
+      val s1 = sample1.getVariance
+      val n1 = sample1.getN
+      val s2 = sample2.getVariance
+      val n2 = sample2.getN
+
+      val a = pow(s1, 2) / n1
+      val b = pow(s2, 2) / n2
+
+      pow(a + b, 2) / ((pow(a, 2) / (n1 - 1)) + (pow(b, 2) / (n2 - 1)))
+    }
+
+    new StreamingTestResult(
+      tTester.get.tTest(statsA, statsB),
+      welchDF(statsA, statsB),
+      tTester.get.t(statsA, statsB),
+      methodName,
+      nullHypothesis
+    )
+  }
+}
+
+/**
+ * Performs Students's 2-sample t-test. The null hypothesis is that the two data sets have equal
+ * mean. This test assumes equal variance between the two samples and does not assume equal sample
+ * size. For unequal variances, Welch's t-test should be used instead.
+ *
+ * @see http://en.wikipedia.org/wiki/Student%27s_t-test
+ */
+private[stat] object StudentTTest extends StreamingTestMethod with Logging {
+
+  override final val methodName = "Student's 2-sample t-test"
+  override final val nullHypothesis = "Both groups have same mean"
+
+  private final val tTester = MeatLocker(new TTest())
+
+  override def doTest(data: SummaryPairStream): DStream[StreamingTestResult] =
+    data.map[StreamingTestResult]((test _).tupled)
+
+  private def test(
+      statsA: StatCounter,
+      statsB: StatCounter): StreamingTestResult = {
+    def studentDF(sample1: StatisticalSummaryValues, sample2: StatisticalSummaryValues): Double =
+      sample1.getN + sample2.getN - 2
+
+    new StreamingTestResult(
+      tTester.get.homoscedasticTTest(statsA, statsB),
+      studentDF(statsA, statsB),
+      tTester.get.homoscedasticT(statsA, statsB),
+      methodName,
+      nullHypothesis
+    )
+  }
+}
+
+/**
+ * Companion object holding supported [[StreamingTestMethod]] names and handles conversion between
+ * strings used in [[StreamingTest]] configuration and actual method implementation.
+ *
+ * Currently supported tests: `welch`, `student`.
+ */
+private[stat] object StreamingTestMethod {
+  // Note: after new `StreamingTestMethod`s are implemented, please update this map.
+  private final val TEST_NAME_TO_OBJECT: Map[String, StreamingTestMethod] = Map(
+    "welch"->WelchTTest,
+    "student"->StudentTTest)
+
+  def getTestMethodFromName(method: String): StreamingTestMethod =
+    TEST_NAME_TO_OBJECT.get(method) match {
+      case Some(test) => test
+      case None =>
+        throw new IllegalArgumentException(
+          "Unrecognized method name. Supported streaming test methods: "
+            + TEST_NAME_TO_OBJECT.keys.mkString(", "))
+    }
+}
+
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
index d01b3707be94..b0916d3e8465 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
@@ -115,3 +115,25 @@ class KolmogorovSmirnovTestResult private[stat] (
     "Kolmogorov-Smirnov test summary:\n" + super.toString
   }
 }
+
+/**
+ * :: Experimental ::
+ * Object containing the test results for streaming testing.
+ */
+@Experimental
+@Since("1.6.0")
+private[stat] class StreamingTestResult @Since("1.6.0") (
+    @Since("1.6.0") override val pValue: Double,
+    @Since("1.6.0") override val degreesOfFreedom: Double,
+    @Since("1.6.0") override val statistic: Double,
+    @Since("1.6.0") val method: String,
+    @Since("1.6.0") override val nullHypothesis: String)
+  extends TestResult[Double] with Serializable {
+
+  override def toString: String = {
+    "Streaming test summary:\n" +
+      s"method: $method\n" +
+      super.toString
+  }
+}
+
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/stat/StreamingTestSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/stat/StreamingTestSuite.scala
new file mode 100644
index 000000000000..d3e9ef4ff079
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/mllib/stat/StreamingTestSuite.scala
@@ -0,0 +1,243 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.stat
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.stat.test.{StreamingTest, StreamingTestResult, StudentTTest, WelchTTest}
+import org.apache.spark.streaming.TestSuiteBase
+import org.apache.spark.streaming.dstream.DStream
+import org.apache.spark.util.StatCounter
+import org.apache.spark.util.random.XORShiftRandom
+
+class StreamingTestSuite extends SparkFunSuite with TestSuiteBase {
+
+  override def maxWaitTimeMillis : Int = 30000
+
+  test("accuracy for null hypothesis using welch t-test") {
+    // set parameters
+    val testMethod = "welch"
+    val numBatches = 2
+    val pointsPerBatch = 1000
+    val meanA = 0
+    val stdevA = 0.001
+    val meanB = 0
+    val stdevB = 0.001
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(0)
+      .setTestMethod(testMethod)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.registerStream(inputDStream))
+    val outputBatches = runStreams[StreamingTestResult](ssc, numBatches, numBatches)
+
+    assert(outputBatches.flatten.forall(res =>
+      res.pValue > 0.05 && res.method == WelchTTest.methodName))
+  }
+
+  test("accuracy for alternative hypothesis using welch t-test") {
+    // set parameters
+    val testMethod = "welch"
+    val numBatches = 2
+    val pointsPerBatch = 1000
+    val meanA = -10
+    val stdevA = 1
+    val meanB = 10
+    val stdevB = 1
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(0)
+      .setTestMethod(testMethod)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.registerStream(inputDStream))
+    val outputBatches = runStreams[StreamingTestResult](ssc, numBatches, numBatches)
+
+    assert(outputBatches.flatten.forall(res =>
+      res.pValue < 0.05 && res.method == WelchTTest.methodName))
+  }
+
+  test("accuracy for null hypothesis using student t-test") {
+    // set parameters
+    val testMethod = "student"
+    val numBatches = 2
+    val pointsPerBatch = 1000
+    val meanA = 0
+    val stdevA = 0.001
+    val meanB = 0
+    val stdevB = 0.001
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(0)
+      .setTestMethod(testMethod)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.registerStream(inputDStream))
+    val outputBatches = runStreams[StreamingTestResult](ssc, numBatches, numBatches)
+
+
+    assert(outputBatches.flatten.forall(res =>
+      res.pValue > 0.05 && res.method == StudentTTest.methodName))
+  }
+
+  test("accuracy for alternative hypothesis using student t-test") {
+    // set parameters
+    val testMethod = "student"
+    val numBatches = 2
+    val pointsPerBatch = 1000
+    val meanA = -10
+    val stdevA = 1
+    val meanB = 10
+    val stdevB = 1
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(0)
+      .setTestMethod(testMethod)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.registerStream(inputDStream))
+    val outputBatches = runStreams[StreamingTestResult](ssc, numBatches, numBatches)
+
+    assert(outputBatches.flatten.forall(res =>
+      res.pValue < 0.05 && res.method == StudentTTest.methodName))
+  }
+
+  test("batches within same test window are grouped") {
+    // set parameters
+    val testWindow = 3
+    val numBatches = 5
+    val pointsPerBatch = 100
+    val meanA = -10
+    val stdevA = 1
+    val meanB = 10
+    val stdevB = 1
+
+    val model = new StreamingTest()
+      .setWindowSize(testWindow)
+      .setPeacePeriod(0)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input,
+      (inputDStream: DStream[(Boolean, Double)]) => model.summarizeByKeyAndWindow(inputDStream))
+    val outputBatches = runStreams[(Boolean, StatCounter)](ssc, numBatches, numBatches)
+    val outputCounts = outputBatches.flatten.map(_._2.count)
+
+    // number of batches seen so far does not exceed testWindow, expect counts to continue growing
+    for (i <- 0 until testWindow) {
+      assert(outputCounts.drop(2 * i).take(2).forall(_ == (i + 1) * pointsPerBatch / 2))
+    }
+
+    // number of batches seen exceeds testWindow, expect counts to be constant
+    assert(outputCounts.drop(2 * (testWindow - 1)).forall(_ == testWindow * pointsPerBatch / 2))
+  }
+
+
+  test("entries in peace period are dropped") {
+    // set parameters
+    val peacePeriod = 3
+    val numBatches = 7
+    val pointsPerBatch = 1000
+    val meanA = -10
+    val stdevA = 1
+    val meanB = 10
+    val stdevB = 1
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(peacePeriod)
+
+    val input = generateTestData(
+      numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.dropPeacePeriod(inputDStream))
+    val outputBatches = runStreams[(Boolean, Double)](ssc, numBatches, numBatches)
+
+    assert(outputBatches.flatten.length == (numBatches - peacePeriod) * pointsPerBatch)
+  }
+
+  test("null hypothesis when only data from one group is present") {
+    // set parameters
+    val numBatches = 2
+    val pointsPerBatch = 1000
+    val meanA = 0
+    val stdevA = 0.001
+    val meanB = 0
+    val stdevB = 0.001
+
+    val model = new StreamingTest()
+      .setWindowSize(0)
+      .setPeacePeriod(0)
+
+    val input = generateTestData(numBatches, pointsPerBatch, meanA, stdevA, meanB, stdevB, 42)
+      .map(batch => batch.filter(_._1)) // only keep one test group
+
+    // setup and run the model
+    val ssc = setupStreams(
+      input, (inputDStream: DStream[(Boolean, Double)]) => model.registerStream(inputDStream))
+    val outputBatches = runStreams[StreamingTestResult](ssc, numBatches, numBatches)
+
+    assert(outputBatches.flatten.forall(result => (result.pValue - 1.0).abs < 0.001))
+  }
+
+  // Generate testing input with half of the entries in group A and half in group B
+  private def generateTestData(
+      numBatches: Int,
+      pointsPerBatch: Int,
+      meanA: Double,
+      stdevA: Double,
+      meanB: Double,
+      stdevB: Double,
+      seed: Int): (IndexedSeq[IndexedSeq[(Boolean, Double)]]) = {
+    val rand = new XORShiftRandom(seed)
+    val numTrues = pointsPerBatch / 2
+    val data = (0 until numBatches).map { i =>
+      (0 until numTrues).map { idx => (true, meanA + stdevA * rand.nextGaussian())} ++
+        (pointsPerBatch / 2 until pointsPerBatch).map { idx =>
+          (false, meanB + stdevB * rand.nextGaussian())
+        }
+    }
+
+    data
+  }
+}

From 97a99dde6e8d69a4c4c135dc1d9b1520b2548b5b Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 21 Sep 2015 13:15:44 -0700
Subject: [PATCH 051/896] [SPARK-10676] [DOCS] Add documentation for SASL
 encryption options.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8803 from vanzin/SPARK-10676.
---
 docs/configuration.md | 16 ++++++++++++++++
 docs/security.md      | 22 ++++++++++++++++++++--
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/docs/configuration.md b/docs/configuration.md
index b22587c70316..284f97ad09ec 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1285,6 +1285,22 @@ Apart from these, the following properties are also available, and may be useful
     not running on YARN and authentication is enabled.
   </td>
 </tr>
+<tr>
+  <td><code>spark.authenticate.enableSaslEncryption</code></td>
+  <td>false</td>
+  <td>
+    Enable encrypted communication when authentication is enabled. This option is currently
+    only supported by the block transfer service.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.network.sasl.serverAlwaysEncrypt</code></td>
+  <td>false</td>
+  <td>
+    Disable unencrypted connections for services that support SASL authentication. This is
+    currently supported by the external shuffle service.
+  </td>
+</tr>
 <tr>
   <td><code>spark.core.connection.ack.wait.timeout</code></td>
   <td>60s</td>
diff --git a/docs/security.md b/docs/security.md
index d4ffa60e59a3..177109415180 100644
--- a/docs/security.md
+++ b/docs/security.md
@@ -23,9 +23,16 @@ If your applications are using event logging, the directory where the event logs
 
 ## Encryption
 
-Spark supports SSL for Akka and HTTP (for broadcast and file server) protocols. However SSL is not supported yet for WebUI and block transfer service.
+Spark supports SSL for Akka and HTTP (for broadcast and file server) protocols. SASL encryption is
+supported for the block transfer service. Encryption is not yet supported for the WebUI.
 
-Connection encryption (SSL) configuration is organized hierarchically. The user can configure the default SSL settings which will be used for all the supported communication protocols unless they are overwritten by protocol-specific settings. This way the user can easily provide the common settings for all the protocols without disabling the ability to configure each one individually. The common SSL settings are at `spark.ssl` namespace in Spark configuration, while Akka SSL configuration is at `spark.ssl.akka` and HTTP for broadcast and file server SSL configuration is at `spark.ssl.fs`. The full breakdown can be found on the [configuration page](configuration.html).
+Encryption is not yet supported for data stored by Spark in temporary local storage, such as shuffle
+files, cached data, and other application files. If encrypting this data is desired, a workaround is
+to configure your cluster manager to store application data on encrypted disks.
+
+### SSL Configuration
+
+Configuration for SSL is organized hierarchically. The user can configure the default SSL settings which will be used for all the supported communication protocols unless they are overwritten by protocol-specific settings. This way the user can easily provide the common settings for all the protocols without disabling the ability to configure each one individually. The common SSL settings are at `spark.ssl` namespace in Spark configuration, while Akka SSL configuration is at `spark.ssl.akka` and HTTP for broadcast and file server SSL configuration is at `spark.ssl.fs`. The full breakdown can be found on the [configuration page](configuration.html).
 
 SSL must be configured on each node and configured for each component involved in communication using the particular protocol.
 
@@ -47,6 +54,17 @@ follows:
 * Import all exported public keys into a single trust-store
 * Distribute the trust-store over the nodes
 
+### Configuring SASL Encryption
+
+SASL encryption is currently supported for the block transfer service when authentication
+(`spark.authenticate`) is enabled. To enable SASL encryption for an application, set
+`spark.authenticate.enableSaslEncryption` to `true` in the application's configuration.
+
+When using an external shuffle service, it's possible to disable unencrypted connections by setting
+`spark.network.sasl.serverAlwaysEncrypt` to `true` in the shuffle service's configuration. If that
+option is enabled, applications that are not set up to use SASL encryption will fail to connect to
+the shuffle service.
+
 ## Configuring Ports for Network Security
 
 Spark makes heavy use of the network, and some environments have strict requirements for using tight

From 362539f8d97f6bb67f0d0983f7dea36b77cc9d18 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Mon, 21 Sep 2015 13:33:10 -0700
Subject: [PATCH 052/896] [SPARK-10630] [SQL] Add a createDataFrame API that
 takes in a java list

It would be nice to support creating a DataFrame directly from a Java List of Row.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8779 from holdenk/SPARK-10630-create-DataFrame-from-Java-List.
---
 .../scala/org/apache/spark/sql/SQLContext.scala    | 14 ++++++++++++++
 .../org/apache/spark/sql/JavaDataFrameSuite.java   | 10 ++++++++++
 2 files changed, 24 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index f099940800cc..1bd4e26fb316 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -476,6 +476,20 @@ class SQLContext(@transient val sparkContext: SparkContext)
     createDataFrame(rowRDD.rdd, schema)
   }
 
+  /**
+   * :: DeveloperApi ::
+   * Creates a [[DataFrame]] from an [[java.util.List]] containing [[Row]]s using the given schema.
+   * It is important to make sure that the structure of every [[Row]] of the provided List matches
+   * the provided schema. Otherwise, there will be runtime exception.
+   *
+   * @group dataframes
+   * @since 1.6.0
+   */
+  @DeveloperApi
+  def createDataFrame(rows: java.util.List[Row], schema: StructType): DataFrame = {
+    DataFrame(self, LocalRelation.fromExternalRows(schema.toAttributes, rows.asScala))
+  }
+
   /**
    * Applies a schema to an RDD of Java Beans.
    *
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index 5f9abd4999ce..250ac2e1092d 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -37,6 +37,7 @@
 import static org.apache.spark.sql.functions.*;
 import org.apache.spark.sql.test.TestSQLContext;
 import org.apache.spark.sql.types.*;
+import static org.apache.spark.sql.types.DataTypes.*;
 
 public class JavaDataFrameSuite {
   private transient JavaSparkContext jsc;
@@ -181,6 +182,15 @@ public void testCreateDataFrameFromJavaBeans() {
     }
   }
 
+  @Test
+  public void testCreateDataFromFromList() {
+    StructType schema = createStructType(Arrays.asList(createStructField("i", IntegerType, true)));
+    List<Row> rows = Arrays.asList(RowFactory.create(0));
+    DataFrame df = context.createDataFrame(rows, schema);
+    Row[] result = df.collect();
+    Assert.assertEquals(1, result.length);
+  }
+
   private static final Comparator<Row> crosstabRowComparator = new Comparator<Row>() {
     @Override
     public int compare(Row row1, Row row2) {

From 7c4f852bfc39537840f56cd8121457a0dc1ad7c1 Mon Sep 17 00:00:00 2001
From: noelsmith <mail@noelsmith.com>
Date: Mon, 21 Sep 2015 14:24:19 -0700
Subject: [PATCH 053/896] [DOC] [PYSPARK] [MLLIB] Added newlines to docstrings
 to fix parameter formatting

Added newlines before `:param ...:` and `:return:` markup. Without these, parameter lists aren't formatted correctly in the API docs. I.e:

![screen shot 2015-09-21 at 21 49 26](https://cloud.githubusercontent.com/assets/11915197/10004686/de3c41d4-60aa-11e5-9c50-a46dcb51243f.png)

.. looks like this once newline is added:

![screen shot 2015-09-21 at 21 50 14](https://cloud.githubusercontent.com/assets/11915197/10004706/f86bfb08-60aa-11e5-8524-ae4436713502.png)

Author: noelsmith <mail@noelsmith.com>

Closes #8851 from noel-smith/docstring-missing-newline-fix.
---
 python/pyspark/ml/param/__init__.py     | 4 ++++
 python/pyspark/ml/pipeline.py           | 1 +
 python/pyspark/ml/tuning.py             | 2 ++
 python/pyspark/ml/wrapper.py            | 2 ++
 python/pyspark/mllib/evaluation.py      | 2 +-
 python/pyspark/mllib/linalg/__init__.py | 1 +
 python/pyspark/streaming/context.py     | 2 ++
 python/pyspark/streaming/mqtt.py        | 1 +
 8 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/ml/param/__init__.py b/python/pyspark/ml/param/__init__.py
index eeeac49b2198..2e0c63cb47b1 100644
--- a/python/pyspark/ml/param/__init__.py
+++ b/python/pyspark/ml/param/__init__.py
@@ -164,6 +164,7 @@ def extractParamMap(self, extra=None):
         a flat param map, where the latter value is used if there exist
         conflicts, i.e., with ordering: default param values <
         user-supplied values < extra.
+
         :param extra: extra param values
         :return: merged param map
         """
@@ -182,6 +183,7 @@ def copy(self, extra=None):
         embedded and extra parameters over and returns the copy.
         Subclasses should override this method if the default approach
         is not sufficient.
+
         :param extra: Extra parameters to copy to the new instance
         :return: Copy of this instance
         """
@@ -201,6 +203,7 @@ def _shouldOwn(self, param):
     def _resolveParam(self, param):
         """
         Resolves a param and validates the ownership.
+
         :param param: param name or the param instance, which must
                       belong to this Params instance
         :return: resolved param instance
@@ -243,6 +246,7 @@ def _copyValues(self, to, extra=None):
         """
         Copies param values from this instance to another instance for
         params shared by them.
+
         :param to: the target instance
         :param extra: extra params to be copied
         :return: the target instance with param values copied
diff --git a/python/pyspark/ml/pipeline.py b/python/pyspark/ml/pipeline.py
index 13cf2b0f7bbd..312a8502b3a2 100644
--- a/python/pyspark/ml/pipeline.py
+++ b/python/pyspark/ml/pipeline.py
@@ -154,6 +154,7 @@ def __init__(self, stages=None):
     def setStages(self, value):
         """
         Set pipeline stages.
+
         :param value: a list of transformers or estimators
         :return: the pipeline instance
         """
diff --git a/python/pyspark/ml/tuning.py b/python/pyspark/ml/tuning.py
index ab5621f45c72..705ee5368575 100644
--- a/python/pyspark/ml/tuning.py
+++ b/python/pyspark/ml/tuning.py
@@ -254,6 +254,7 @@ def copy(self, extra=None):
         Creates a copy of this instance with a randomly generated uid
         and some extra params. This copies creates a deep copy of
         the embedded paramMap, and copies the embedded and extra parameters over.
+
         :param extra: Extra parameters to copy to the new instance
         :return: Copy of this instance
         """
@@ -290,6 +291,7 @@ def copy(self, extra=None):
         and some extra params. This copies the underlying bestModel,
         creates a deep copy of the embedded paramMap, and
         copies the embedded and extra parameters over.
+
         :param extra: Extra parameters to copy to the new instance
         :return: Copy of this instance
         """
diff --git a/python/pyspark/ml/wrapper.py b/python/pyspark/ml/wrapper.py
index 8218c7c5f801..4bcb4aaec89d 100644
--- a/python/pyspark/ml/wrapper.py
+++ b/python/pyspark/ml/wrapper.py
@@ -119,6 +119,7 @@ def _create_model(self, java_model):
     def _fit_java(self, dataset):
         """
         Fits a Java model to the input dataset.
+
         :param dataset: input dataset, which is an instance of
                         :py:class:`pyspark.sql.DataFrame`
         :param params: additional params (overwriting embedded values)
@@ -173,6 +174,7 @@ def copy(self, extra=None):
         extra params. This implementation first calls Params.copy and
         then make a copy of the companion Java model with extra params.
         So both the Python wrapper and the Java model get copied.
+
         :param extra: Extra parameters to copy to the new instance
         :return: Copy of this instance
         """
diff --git a/python/pyspark/mllib/evaluation.py b/python/pyspark/mllib/evaluation.py
index 4398ca86f2ec..a90e5c50e54b 100644
--- a/python/pyspark/mllib/evaluation.py
+++ b/python/pyspark/mllib/evaluation.py
@@ -147,7 +147,7 @@ class MulticlassMetrics(JavaModelWrapper):
     """
     Evaluator for multiclass classification.
 
-    :param predictionAndLabels an RDD of (prediction, label) pairs.
+    :param predictionAndLabels: an RDD of (prediction, label) pairs.
 
     >>> predictionAndLabels = sc.parallelize([(0.0, 0.0), (0.0, 1.0), (0.0, 0.0),
     ...     (1.0, 0.0), (1.0, 1.0), (1.0, 1.0), (1.0, 1.0), (2.0, 2.0), (2.0, 0.0)])
diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index f929e3e96fbe..ea42127f1651 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -240,6 +240,7 @@ class Vector(object):
     def toArray(self):
         """
         Convert the vector into an numpy.ndarray
+
         :return: numpy.ndarray
         """
         raise NotImplementedError
diff --git a/python/pyspark/streaming/context.py b/python/pyspark/streaming/context.py
index 4069d7a14998..a8c9ffc235b9 100644
--- a/python/pyspark/streaming/context.py
+++ b/python/pyspark/streaming/context.py
@@ -240,6 +240,7 @@ def start(self):
     def awaitTermination(self, timeout=None):
         """
         Wait for the execution to stop.
+
         @param timeout: time to wait in seconds
         """
         if timeout is None:
@@ -252,6 +253,7 @@ def awaitTerminationOrTimeout(self, timeout):
         Wait for the execution to stop. Return `true` if it's stopped; or
         throw the reported error during the execution; or `false` if the
         waiting time elapsed before returning from the method.
+
         @param timeout: time to wait in seconds
         """
         self._jssc.awaitTerminationOrTimeout(int(timeout * 1000))
diff --git a/python/pyspark/streaming/mqtt.py b/python/pyspark/streaming/mqtt.py
index f06598971c54..fa83006c36db 100644
--- a/python/pyspark/streaming/mqtt.py
+++ b/python/pyspark/streaming/mqtt.py
@@ -31,6 +31,7 @@ def createStream(ssc, brokerUrl, topic,
                      storageLevel=StorageLevel.MEMORY_AND_DISK_SER_2):
         """
         Create an input stream that pulls messages from a Mqtt Broker.
+
         :param ssc:  StreamingContext object
         :param brokerUrl:  Url of remote mqtt publisher
         :param topic:  topic name to subscribe to

From 72869883f12b6e0a4e5aad79c0ac2cfdb4d83f09 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Mon, 21 Sep 2015 16:47:52 -0700
Subject: [PATCH 054/896] [SPARK-10649] [STREAMING] Prevent inheriting job
 group and irrelevant job description in streaming jobs

The job group, and job descriptions information is passed through thread local properties, and get inherited by child threads. In case of spark streaming, the streaming jobs inherit these properties from the thread that called streamingContext.start(). This may not make sense.

1. Job group: This is mainly used for cancelling a group of jobs together. It does not make sense to cancel streaming jobs like this, as the effect will be unpredictable. And its not a valid usecase any way, to cancel a streaming context, call streamingContext.stop()

2. Job description: This is used to pass on nice text descriptions for jobs to show up in the UI. The job description of the thread that calls streamingContext.start() is not useful for all the streaming jobs, as it does not make sense for all of the streaming jobs to have the same description, and the description may or may not be related to streaming.

The solution in this PR is meant for the Spark master branch, where local properties are inherited by cloning the properties. The job group and job description in the thread that starts the streaming scheduler are explicitly removed, so that all the subsequent child threads does not inherit them. Also, the starting is done in a new child thread, so that setting the job group and description for streaming, does not change those properties in the thread that called streamingContext.start().

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #8781 from tdas/SPARK-10649.
---
 .../org/apache/spark/util/ThreadUtils.scala   | 59 +++++++++++++++++++
 .../apache/spark/util/ThreadUtilsSuite.scala  | 24 +++++++-
 .../spark/streaming/StreamingContext.scala    | 15 ++++-
 .../streaming/StreamingContextSuite.scala     | 32 ++++++++++
 4 files changed, 126 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index ca5624a3d8b3..22e291a2b48d 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -21,6 +21,7 @@ package org.apache.spark.util
 import java.util.concurrent._
 
 import scala.concurrent.{ExecutionContext, ExecutionContextExecutor}
+import scala.util.control.NonFatal
 
 import com.google.common.util.concurrent.{MoreExecutors, ThreadFactoryBuilder}
 
@@ -86,4 +87,62 @@ private[spark] object ThreadUtils {
     val threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat(threadName).build()
     Executors.newSingleThreadScheduledExecutor(threadFactory)
   }
+
+  /**
+   * Run a piece of code in a new thread and return the result. Exception in the new thread is
+   * thrown in the caller thread with an adjusted stack trace that removes references to this
+   * method for clarity. The exception stack traces will be like the following
+   *
+   * SomeException: exception-message
+   *   at CallerClass.body-method (sourcefile.scala)
+   *   at ... run in separate thread using org.apache.spark.util.ThreadUtils ... ()
+   *   at CallerClass.caller-method (sourcefile.scala)
+   *   ...
+   */
+  def runInNewThread[T](
+      threadName: String,
+      isDaemon: Boolean = true)(body: => T): T = {
+    @volatile var exception: Option[Throwable] = None
+    @volatile var result: T = null.asInstanceOf[T]
+
+    val thread = new Thread(threadName) {
+      override def run(): Unit = {
+        try {
+          result = body
+        } catch {
+          case NonFatal(e) =>
+            exception = Some(e)
+        }
+      }
+    }
+    thread.setDaemon(isDaemon)
+    thread.start()
+    thread.join()
+
+    exception match {
+      case Some(realException) =>
+        // Remove the part of the stack that shows method calls into this helper method
+        // This means drop everything from the top until the stack element
+        // ThreadUtils.runInNewThread(), and then drop that as well (hence the `drop(1)`).
+        val baseStackTrace = Thread.currentThread().getStackTrace().dropWhile(
+          ! _.getClassName.contains(this.getClass.getSimpleName)).drop(1)
+
+        // Remove the part of the new thread stack that shows methods call from this helper method
+        val extraStackTrace = realException.getStackTrace.takeWhile(
+          ! _.getClassName.contains(this.getClass.getSimpleName))
+
+        // Combine the two stack traces, with a place holder just specifying that there
+        // was a helper method used, without any further details of the helper
+        val placeHolderStackElem = new StackTraceElement(
+          s"... run in separate thread using ${ThreadUtils.getClass.getName.stripSuffix("$")} ..",
+          " ", "", -1)
+        val finalStackTrace = extraStackTrace ++ Seq(placeHolderStackElem) ++ baseStackTrace
+
+        // Update the stack trace and rethrow the exception in the caller thread
+        realException.setStackTrace(finalStackTrace)
+        throw realException
+      case None =>
+        result
+    }
+  }
 }
diff --git a/core/src/test/scala/org/apache/spark/util/ThreadUtilsSuite.scala b/core/src/test/scala/org/apache/spark/util/ThreadUtilsSuite.scala
index 8c51e6b14b7f..620e4debf4e0 100644
--- a/core/src/test/scala/org/apache/spark/util/ThreadUtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/ThreadUtilsSuite.scala
@@ -20,8 +20,9 @@ package org.apache.spark.util
 
 import java.util.concurrent.{CountDownLatch, TimeUnit}
 
-import scala.concurrent.{Await, Future}
 import scala.concurrent.duration._
+import scala.concurrent.{Await, Future}
+import scala.util.Random
 
 import org.apache.spark.SparkFunSuite
 
@@ -66,4 +67,25 @@ class ThreadUtilsSuite extends SparkFunSuite {
     val futureThreadName = Await.result(f, 10.seconds)
     assert(futureThreadName === callerThreadName)
   }
+
+  test("runInNewThread") {
+    import ThreadUtils._
+    assert(runInNewThread("thread-name") { Thread.currentThread().getName } === "thread-name")
+    assert(runInNewThread("thread-name") { Thread.currentThread().isDaemon } === true)
+    assert(
+      runInNewThread("thread-name", isDaemon = false) { Thread.currentThread().isDaemon } === false
+    )
+    val uniqueExceptionMessage = "test" + Random.nextInt()
+    val exception = intercept[IllegalArgumentException] {
+      runInNewThread("thread-name") { throw new IllegalArgumentException(uniqueExceptionMessage) }
+    }
+    assert(exception.asInstanceOf[IllegalArgumentException].getMessage === uniqueExceptionMessage)
+    assert(exception.getStackTrace.mkString("\n").contains(
+      "... run in separate thread using org.apache.spark.util.ThreadUtils ...") === true,
+      "stack trace does not contain expected place holder"
+    )
+    assert(exception.getStackTrace.mkString("\n").contains("ThreadUtils.scala") === false,
+      "stack trace contains unexpected references to ThreadUtils"
+    )
+  }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index b496d1f341a0..6720ba4f72cf 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -44,7 +44,7 @@ import org.apache.spark.streaming.dstream._
 import org.apache.spark.streaming.receiver.{ActorReceiver, ActorSupervisorStrategy, Receiver}
 import org.apache.spark.streaming.scheduler.{JobScheduler, StreamingListener}
 import org.apache.spark.streaming.ui.{StreamingJobProgressListener, StreamingTab}
-import org.apache.spark.util.{CallSite, ShutdownHookManager, Utils}
+import org.apache.spark.util.{CallSite, ShutdownHookManager, ThreadUtils}
 
 /**
  * Main entry point for Spark Streaming functionality. It provides methods used to create
@@ -588,12 +588,20 @@ class StreamingContext private[streaming] (
     state match {
       case INITIALIZED =>
         startSite.set(DStream.getCreationSite())
-        sparkContext.setCallSite(startSite.get)
         StreamingContext.ACTIVATION_LOCK.synchronized {
           StreamingContext.assertNoOtherContextIsActive()
           try {
             validate()
-            scheduler.start()
+
+            // Start the streaming scheduler in a new thread, so that thread local properties
+            // like call sites and job groups can be reset without affecting those of the
+            // current thread.
+            ThreadUtils.runInNewThread("streaming-start") {
+              sparkContext.setCallSite(startSite.get)
+              sparkContext.clearJobGroup()
+              sparkContext.setLocalProperty(SparkContext.SPARK_JOB_INTERRUPT_ON_CANCEL, "false")
+              scheduler.start()
+            }
             state = StreamingContextState.ACTIVE
           } catch {
             case NonFatal(e) =>
@@ -618,6 +626,7 @@ class StreamingContext private[streaming] (
     }
   }
 
+
   /**
    * Wait for the execution to stop. Any exceptions that occurs during the execution
    * will be thrown in this thread.
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
index d26894e88fc2..3b9d0d15ea04 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
@@ -180,6 +180,38 @@ class StreamingContextSuite extends SparkFunSuite with BeforeAndAfter with Timeo
     assert(ssc.scheduler.isStarted === false)
   }
 
+  test("start should set job group and description of streaming jobs correctly") {
+    ssc = new StreamingContext(conf, batchDuration)
+    ssc.sc.setJobGroup("non-streaming", "non-streaming", true)
+    val sc = ssc.sc
+
+    @volatile var jobGroupFound: String = ""
+    @volatile var jobDescFound: String = ""
+    @volatile var jobInterruptFound: String = ""
+    @volatile var allFound: Boolean = false
+
+    addInputStream(ssc).foreachRDD { rdd =>
+      jobGroupFound = sc.getLocalProperty(SparkContext.SPARK_JOB_GROUP_ID)
+      jobDescFound = sc.getLocalProperty(SparkContext.SPARK_JOB_DESCRIPTION)
+      jobInterruptFound = sc.getLocalProperty(SparkContext.SPARK_JOB_INTERRUPT_ON_CANCEL)
+      allFound = true
+    }
+    ssc.start()
+
+    eventually(timeout(10 seconds), interval(10 milliseconds)) {
+      assert(allFound === true)
+    }
+
+    // Verify streaming jobs have expected thread-local properties
+    assert(jobGroupFound === null)
+    assert(jobDescFound === null)
+    assert(jobInterruptFound === "false")
+
+    // Verify current thread's thread-local properties have not changed
+    assert(sc.getLocalProperty(SparkContext.SPARK_JOB_GROUP_ID) === "non-streaming")
+    assert(sc.getLocalProperty(SparkContext.SPARK_JOB_DESCRIPTION) === "non-streaming")
+    assert(sc.getLocalProperty(SparkContext.SPARK_JOB_INTERRUPT_ON_CANCEL) === "true")
+  }
 
   test("start multiple times") {
     ssc = new StreamingContext(master, appName, batchDuration)

From 0494c80ef54f6f3a8c6f2d92abfe1a77a91df8b0 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Mon, 21 Sep 2015 18:06:45 -0700
Subject: [PATCH 055/896] [SPARK-10495] [SQL] Read date values in JSON data
 stored by Spark 1.5.0.

https://issues.apache.org/jira/browse/SPARK-10681

Author: Yin Huai <yhuai@databricks.com>

Closes #8806 from yhuai/SPARK-10495.
---
 .../datasources/json/JacksonGenerator.scala   |  36 ++++++
 .../datasources/json/JacksonParser.scala      |  15 ++-
 .../datasources/json/JsonSuite.scala          | 103 +++++++++++++++++-
 3 files changed, 152 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
index f65c7bbd6e29..23bada1ddd92 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
@@ -73,6 +73,38 @@ private[sql] object JacksonGenerator {
             valWriter(field.dataType, v)
         }
         gen.writeEndObject()
+
+      // For UDT, udt.serialize will produce SQL types. So, we need the following three cases.
+      case (ArrayType(ty, _), v: ArrayData) =>
+        gen.writeStartArray()
+        v.foreach(ty, (_, value) => valWriter(ty, value))
+        gen.writeEndArray()
+
+      case (MapType(kt, vt, _), v: MapData) =>
+        gen.writeStartObject()
+        v.foreach(kt, vt, { (k, v) =>
+          gen.writeFieldName(k.toString)
+          valWriter(vt, v)
+        })
+        gen.writeEndObject()
+
+      case (StructType(ty), v: InternalRow) =>
+        gen.writeStartObject()
+        var i = 0
+        while (i < ty.length) {
+          val field = ty(i)
+          val value = v.get(i, field.dataType)
+          if (value != null) {
+            gen.writeFieldName(field.name)
+            valWriter(field.dataType, value)
+          }
+          i += 1
+        }
+        gen.writeEndObject()
+
+      case (dt, v) =>
+        sys.error(
+          s"Failed to convert value $v (class of ${v.getClass}}) with the type of $dt to JSON.")
     }
 
     valWriter(rowSchema, row)
@@ -133,6 +165,10 @@ private[sql] object JacksonGenerator {
           i += 1
         }
         gen.writeEndObject()
+
+      case (dt, v) =>
+        sys.error(
+          s"Failed to convert value $v (class of ${v.getClass}}) with the type of $dt to JSON.")
     }
 
     valWriter(rowSchema, row)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
index ff4d8c04e8ea..c51140749c8e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
@@ -62,10 +62,23 @@ private[sql] object JacksonParser {
         // guard the non string type
         null
 
+      case (VALUE_STRING, BinaryType) =>
+        parser.getBinaryValue
+
       case (VALUE_STRING, DateType) =>
-        DateTimeUtils.millisToDays(DateTimeUtils.stringToTime(parser.getText).getTime)
+        val stringValue = parser.getText
+        if (stringValue.contains("-")) {
+          // The format of this string will probably be "yyyy-mm-dd".
+          DateTimeUtils.millisToDays(DateTimeUtils.stringToTime(parser.getText).getTime)
+        } else {
+          // In Spark 1.5.0, we store the data as number of days since epoch in string.
+          // So, we just convert it to Int.
+          stringValue.toInt
+        }
 
       case (VALUE_STRING, TimestampType) =>
+        // This one will lose microseconds parts.
+        // See https://issues.apache.org/jira/browse/SPARK-10681.
         DateTimeUtils.stringToTime(parser.getText).getTime * 1000L
 
       case (VALUE_NUMBER_INT, TimestampType) =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index 6a18cc6d2713..b614e6c4148f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -24,7 +24,7 @@ import com.fasterxml.jackson.core.JsonFactory
 import org.apache.spark.rdd.RDD
 import org.scalactic.Tolerance._
 
-import org.apache.spark.sql.{QueryTest, Row, SQLConf}
+import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.execution.datasources.{ResolvedDataSource, LogicalRelation}
 import org.apache.spark.sql.execution.datasources.json.InferSchema.compatibleType
@@ -1159,4 +1159,105 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
           "SELECT count(a) FROM test_myjson_with_part where d1 = 1"), Row(9))
     })
   }
+
+  test("backward compatibility") {
+    // This test we make sure our JSON support can read JSON data generated by previous version
+    // of Spark generated through toJSON method and JSON data source.
+    // The data is generated by the following program.
+    // Here are a few notes:
+    //  - Spark 1.5.0 cannot save timestamp data. So, we manually added timestamp field (col13)
+    //      in the JSON object.
+    //  - For Spark before 1.5.1, we do not generate UDTs. So, we manually added the UDT value to
+    //      JSON objects generated by those Spark versions (col17).
+    //  - If the type is NullType, we do not write data out.
+
+    // Create the schema.
+    val struct =
+      StructType(
+        StructField("f1", FloatType, true) ::
+          StructField("f2", ArrayType(BooleanType), true) :: Nil)
+
+    val dataTypes =
+      Seq(
+        StringType, BinaryType, NullType, BooleanType,
+        ByteType, ShortType, IntegerType, LongType,
+        FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
+        DateType, TimestampType,
+        ArrayType(IntegerType), MapType(StringType, LongType), struct,
+        new MyDenseVectorUDT())
+    val fields = dataTypes.zipWithIndex.map { case (dataType, index) =>
+      StructField(s"col$index", dataType, nullable = true)
+    }
+    val schema = StructType(fields)
+
+    val constantValues =
+      Seq(
+        "a string in binary".getBytes("UTF-8"),
+        null,
+        true,
+        1.toByte,
+        2.toShort,
+        3,
+        Long.MaxValue,
+        0.25.toFloat,
+        0.75,
+        new java.math.BigDecimal(s"1234.23456"),
+        new java.math.BigDecimal(s"1.23456"),
+        java.sql.Date.valueOf("2015-01-01"),
+        java.sql.Timestamp.valueOf("2015-01-01 23:50:59.123"),
+        Seq(2, 3, 4),
+        Map("a string" -> 2000L),
+        Row(4.75.toFloat, Seq(false, true)),
+        new MyDenseVector(Array(0.25, 2.25, 4.25)))
+    val data =
+      Row.fromSeq(Seq("Spark " + sqlContext.sparkContext.version) ++ constantValues) :: Nil
+
+    // Data generated by previous versions.
+    // scalastyle:off
+    val existingJSONData =
+      """{"col0":"Spark 1.2.2","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.3.1","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.3.1","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.4.1","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.4.1","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.5.0","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"2015-01-01","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" ::
+      """{"col0":"Spark 1.5.0","col1":"YSBzdHJpbmcgaW4gYmluYXJ5","col3":true,"col4":1,"col5":2,"col6":3,"col7":9223372036854775807,"col8":0.25,"col9":0.75,"col10":1234.23456,"col11":1.23456,"col12":"16436","col13":"2015-01-01 23:50:59.123","col14":[2,3,4],"col15":{"a string":2000},"col16":{"f1":4.75,"f2":[false,true]},"col17":[0.25,2.25,4.25]}""" :: Nil
+    // scalastyle:on
+
+    // Generate data for the current version.
+    val df = sqlContext.createDataFrame(sqlContext.sparkContext.parallelize(data, 1), schema)
+    withTempPath { path =>
+      df.write.format("json").mode("overwrite").save(path.getCanonicalPath)
+
+      // df.toJSON will convert internal rows to external rows first and then generate
+      // JSON objects. While, df.write.format("json") will write internal rows directly.
+      val allJSON =
+        existingJSONData ++
+          df.toJSON.collect() ++
+          sparkContext.textFile(path.getCanonicalPath).collect()
+
+      Utils.deleteRecursively(path)
+      sparkContext.parallelize(allJSON, 1).saveAsTextFile(path.getCanonicalPath)
+
+      // Read data back with the schema specified.
+      val col0Values =
+        Seq(
+          "Spark 1.2.2",
+          "Spark 1.3.1",
+          "Spark 1.3.1",
+          "Spark 1.4.1",
+          "Spark 1.4.1",
+          "Spark 1.5.0",
+          "Spark 1.5.0",
+          "Spark " + sqlContext.sparkContext.version,
+          "Spark " + sqlContext.sparkContext.version)
+      val expectedResult = col0Values.map { v =>
+        Row.fromSeq(Seq(v) ++ constantValues)
+      }
+      checkAnswer(
+        sqlContext.read.format("json").schema(schema).load(path.getCanonicalPath),
+        expectedResult
+      )
+    }
+  }
 }

From c986e933a900602af47966bd41edb2116c421a39 Mon Sep 17 00:00:00 2001
From: Hossein <hossein@databricks.com>
Date: Mon, 21 Sep 2015 21:09:59 -0700
Subject: [PATCH 056/896] [SPARK-10711] [SPARKR] Do not assume
 spark.submit.deployMode is always set

In ```RUtils.sparkRPackagePath()``` we
1. Call ``` sys.props("spark.submit.deployMode")``` which returns null if ```spark.submit.deployMode``` is not suet
2. Call ``` sparkConf.get("spark.submit.deployMode")``` which throws ```NoSuchElementException``` if ```spark.submit.deployMode``` is not set. This patch simply passes a default value ("cluster") for ```spark.submit.deployMode```.

cc rxin

Author: Hossein <hossein@databricks.com>

Closes #8832 from falaki/SPARK-10711.
---
 core/src/main/scala/org/apache/spark/api/r/RUtils.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/api/r/RUtils.scala b/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
index 9e807cc52f18..fd5646b5b637 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
@@ -44,7 +44,7 @@ private[spark] object RUtils {
         (sys.props("spark.master"), sys.props("spark.submit.deployMode"))
       } else {
         val sparkConf = SparkEnv.get.conf
-        (sparkConf.get("spark.master"), sparkConf.get("spark.submit.deployMode"))
+        (sparkConf.get("spark.master"), sparkConf.get("spark.submit.deployMode", "client"))
       }
 
     val isYarnCluster = master != null && master.contains("yarn") && deployMode == "cluster"

From 1cd67415728e660a90e4dbe136272b5d6b8f1142 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Mon, 21 Sep 2015 23:21:24 -0700
Subject: [PATCH 057/896] [SPARK-9821] [PYSPARK]
 pyspark-reduceByKey-should-take-a-custom-partitioner

from the issue:

In Scala, I can supply a custom partitioner to reduceByKey (and other aggregation/repartitioning methods like aggregateByKey and combinedByKey), but as far as I can tell from the Pyspark API, there's no way to do the same in Python.
Here's an example of my code in Scala:
weblogs.map(s => (getFileType(s), 1)).reduceByKey(new FileTypePartitioner(),_+_)
But I can't figure out how to do the same in Python. The closest I can get is to call repartition before reduceByKey like so:
weblogs.map(lambda s: (getFileType(s), 1)).partitionBy(3,hash_filetype).reduceByKey(lambda v1,v2: v1+v2).collect()
But that defeats the purpose, because I'm shuffling twice instead of once, so my performance is worse instead of better.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8569 from holdenk/SPARK-9821-pyspark-reduceByKey-should-take-a-custom-partitioner.
---
 python/pyspark/rdd.py | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index 73d7d9a5692a..56e892243c79 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -686,7 +686,7 @@ def cartesian(self, other):
                                              other._jrdd_deserializer)
         return RDD(self._jrdd.cartesian(other._jrdd), self.ctx, deserializer)
 
-    def groupBy(self, f, numPartitions=None):
+    def groupBy(self, f, numPartitions=None, partitionFunc=portable_hash):
         """
         Return an RDD of grouped items.
 
@@ -695,7 +695,7 @@ def groupBy(self, f, numPartitions=None):
         >>> sorted([(x, sorted(y)) for (x, y) in result])
         [(0, [2, 8]), (1, [1, 1, 3, 5])]
         """
-        return self.map(lambda x: (f(x), x)).groupByKey(numPartitions)
+        return self.map(lambda x: (f(x), x)).groupByKey(numPartitions, partitionFunc)
 
     @ignore_unicode_prefix
     def pipe(self, command, env=None, checkCode=False):
@@ -1539,22 +1539,23 @@ def values(self):
         """
         return self.map(lambda x: x[1])
 
-    def reduceByKey(self, func, numPartitions=None):
+    def reduceByKey(self, func, numPartitions=None, partitionFunc=portable_hash):
         """
         Merge the values for each key using an associative reduce function.
 
         This will also perform the merging locally on each mapper before
         sending results to a reducer, similarly to a "combiner" in MapReduce.
 
-        Output will be hash-partitioned with C{numPartitions} partitions, or
+        Output will be partitioned with C{numPartitions} partitions, or
         the default parallelism level if C{numPartitions} is not specified.
+        Default partitioner is hash-partition.
 
         >>> from operator import add
         >>> rdd = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
         >>> sorted(rdd.reduceByKey(add).collect())
         [('a', 2), ('b', 1)]
         """
-        return self.combineByKey(lambda x: x, func, func, numPartitions)
+        return self.combineByKey(lambda x: x, func, func, numPartitions, partitionFunc)
 
     def reduceByKeyLocally(self, func):
         """
@@ -1739,7 +1740,7 @@ def add_shuffle_key(split, iterator):
 
     # TODO: add control over map-side aggregation
     def combineByKey(self, createCombiner, mergeValue, mergeCombiners,
-                     numPartitions=None):
+                     numPartitions=None, partitionFunc=portable_hash):
         """
         Generic function to combine the elements for each key using a custom
         set of aggregation functions.
@@ -1777,7 +1778,7 @@ def combineLocally(iterator):
             return merger.items()
 
         locally_combined = self.mapPartitions(combineLocally, preservesPartitioning=True)
-        shuffled = locally_combined.partitionBy(numPartitions)
+        shuffled = locally_combined.partitionBy(numPartitions, partitionFunc)
 
         def _mergeCombiners(iterator):
             merger = ExternalMerger(agg, memory, serializer)
@@ -1786,7 +1787,8 @@ def _mergeCombiners(iterator):
 
         return shuffled.mapPartitions(_mergeCombiners, preservesPartitioning=True)
 
-    def aggregateByKey(self, zeroValue, seqFunc, combFunc, numPartitions=None):
+    def aggregateByKey(self, zeroValue, seqFunc, combFunc, numPartitions=None,
+                       partitionFunc=portable_hash):
         """
         Aggregate the values of each key, using given combine functions and a neutral
         "zero value". This function can return a different result type, U, than the type
@@ -1800,9 +1802,9 @@ def createZero():
             return copy.deepcopy(zeroValue)
 
         return self.combineByKey(
-            lambda v: seqFunc(createZero(), v), seqFunc, combFunc, numPartitions)
+            lambda v: seqFunc(createZero(), v), seqFunc, combFunc, numPartitions, partitionFunc)
 
-    def foldByKey(self, zeroValue, func, numPartitions=None):
+    def foldByKey(self, zeroValue, func, numPartitions=None, partitionFunc=portable_hash):
         """
         Merge the values for each key using an associative function "func"
         and a neutral "zeroValue" which may be added to the result an
@@ -1817,13 +1819,14 @@ def foldByKey(self, zeroValue, func, numPartitions=None):
         def createZero():
             return copy.deepcopy(zeroValue)
 
-        return self.combineByKey(lambda v: func(createZero(), v), func, func, numPartitions)
+        return self.combineByKey(lambda v: func(createZero(), v), func, func, numPartitions,
+                                 partitionFunc)
 
     def _memory_limit(self):
         return _parse_memory(self.ctx._conf.get("spark.python.worker.memory", "512m"))
 
     # TODO: support variant with custom partitioner
-    def groupByKey(self, numPartitions=None):
+    def groupByKey(self, numPartitions=None, partitionFunc=portable_hash):
         """
         Group the values for each key in the RDD into a single sequence.
         Hash-partitions the resulting RDD with numPartitions partitions.
@@ -1859,7 +1862,7 @@ def combine(iterator):
             return merger.items()
 
         locally_combined = self.mapPartitions(combine, preservesPartitioning=True)
-        shuffled = locally_combined.partitionBy(numPartitions)
+        shuffled = locally_combined.partitionBy(numPartitions, partitionFunc)
 
         def groupByKey(it):
             merger = ExternalGroupBy(agg, memory, serializer)

From bf20d6c9f9e478a5de24b45bbafd4dd89666c4cf Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Mon, 21 Sep 2015 23:29:59 -0700
Subject: [PATCH 058/896] [SPARK-10716] [BUILD] spark-1.5.0-bin-hadoop2.6.tgz
 file doesn't uncompress on OS X due to hidden file

Remove ._SUCCESS.crc hidden file that may cause problems in distribution tar archive, and is not used

Author: Sean Owen <sowen@cloudera.com>

Closes #8846 from srowen/SPARK-10716.
---
 .../test_support/sql/orc_partitioned/._SUCCESS.crc  | Bin 8 -> 0 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 python/test_support/sql/orc_partitioned/._SUCCESS.crc

diff --git a/python/test_support/sql/orc_partitioned/._SUCCESS.crc b/python/test_support/sql/orc_partitioned/._SUCCESS.crc
deleted file mode 100644
index 3b7b044936a890cd8d651d349a752d819d71d22c..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 8
PcmYc;N@ieSU}69O2$TUk


From 0180b849dbaf191826231eda7dfaaf146a19602b Mon Sep 17 00:00:00 2001
From: Jian Feng <jzhang.chs@gmail.com>
Date: Mon, 21 Sep 2015 23:36:41 -0700
Subject: [PATCH 059/896] [SPARK-10577] [PYSPARK] DataFrame hint for broadcast
 join

https://issues.apache.org/jira/browse/SPARK-10577

Author: Jian Feng <jzhang.chs@gmail.com>

Closes #8801 from Jianfeng-chs/master.
---
 python/pyspark/sql/functions.py |  9 +++++++++
 python/pyspark/sql/tests.py     | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index 26b8662718a6..fa04f4cd83b6 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -29,6 +29,7 @@
 from pyspark.serializers import PickleSerializer, AutoBatchedSerializer
 from pyspark.sql.types import StringType
 from pyspark.sql.column import Column, _to_java_column, _to_seq
+from pyspark.sql.dataframe import DataFrame
 
 
 def _create_function(name, doc=""):
@@ -189,6 +190,14 @@ def approxCountDistinct(col, rsd=None):
     return Column(jc)
 
 
+@since(1.6)
+def broadcast(df):
+    """Marks a DataFrame as small enough for use in broadcast joins."""
+
+    sc = SparkContext._active_spark_context
+    return DataFrame(sc._jvm.functions.broadcast(df._jdf), df.sql_ctx)
+
+
 @since(1.4)
 def coalesce(*cols):
     """Returns the first column that is not null.
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index 3e680f1030a7..645133b2b2d8 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -1075,6 +1075,24 @@ def foo():
 
         self.assertRaises(TypeError, foo)
 
+    # add test for SPARK-10577 (test broadcast join hint)
+    def test_functions_broadcast(self):
+        from pyspark.sql.functions import broadcast
+
+        df1 = self.sqlCtx.createDataFrame([(1, "1"), (2, "2")], ("key", "value"))
+        df2 = self.sqlCtx.createDataFrame([(1, "1"), (2, "2")], ("key", "value"))
+
+        # equijoin - should be converted into broadcast join
+        plan1 = df1.join(broadcast(df2), "key")._jdf.queryExecution().executedPlan()
+        self.assertEqual(1, plan1.toString().count("BroadcastHashJoin"))
+
+        # no join key -- should not be a broadcast join
+        plan2 = df1.join(broadcast(df2))._jdf.queryExecution().executedPlan()
+        self.assertEqual(0, plan2.toString().count("BroadcastHashJoin"))
+
+        # planner should not crash without a join
+        broadcast(df1)._jdf.queryExecution().executedPlan()
+
 
 class HiveContextSQLTests(ReusedPySparkTestCase):
 

From 781b21ba2a873ed29394c8dbc74fc700e3e0d17e Mon Sep 17 00:00:00 2001
From: Ewan Leith <ewan.leith@realitymine.com>
Date: Mon, 21 Sep 2015 23:43:20 -0700
Subject: [PATCH 060/896] [SPARK-10419] [SQL] Adding SQLServer support for
 datetimeoffset types to JdbcDialects

Reading from Microsoft SQL Server over jdbc fails when the table contains datetimeoffset types.

This patch registers a SQLServer JDBC Dialect that maps datetimeoffset to a String, as Microsoft suggest.

Author: Ewan Leith <ewan.leith@realitymine.com>

Closes #8575 from realitymine-coordinator/sqlserver.
---
 .../apache/spark/sql/jdbc/JdbcDialects.scala   | 18 ++++++++++++++++++
 .../org/apache/spark/sql/jdbc/JDBCSuite.scala  |  1 +
 2 files changed, 19 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index 68ebaaca6c53..c70fea1c3f50 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -137,6 +137,8 @@ object JdbcDialects {
   registerDialect(MySQLDialect)
   registerDialect(PostgresDialect)
   registerDialect(DB2Dialect)
+  registerDialect(MsSqlServerDialect)
+
 
   /**
    * Fetch the JdbcDialect class corresponding to a given database url.
@@ -260,3 +262,19 @@ case object DB2Dialect extends JdbcDialect {
     case _ => None
   }
 }
+
+/**
+ * :: DeveloperApi ::
+ * Default Microsoft SQL Server dialect, mapping the datetimeoffset types to a String on read.
+ */
+@DeveloperApi
+case object MsSqlServerDialect extends JdbcDialect {
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:sqlserver")
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (typeName.contains("datetimeoffset")) {
+      // String is recommend by Microsoft SQL Server for datetimeoffset types in non-MS clients
+      Some(StringType)
+    } else None
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
index 5ab9381de4d6..c4b039a9c535 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
@@ -408,6 +408,7 @@ class JDBCSuite extends SparkFunSuite with BeforeAndAfter with SharedSQLContext
     assert(JdbcDialects.get("jdbc:mysql://127.0.0.1/db") == MySQLDialect)
     assert(JdbcDialects.get("jdbc:postgresql://127.0.0.1/db") == PostgresDialect)
     assert(JdbcDialects.get("jdbc:db2://127.0.0.1/db") == DB2Dialect)
+    assert(JdbcDialects.get("jdbc:sqlserver://127.0.0.1/db") == MsSqlServerDialect)
     assert(JdbcDialects.get("test.invalid") == NoopDialect)
   }
 

From 1fcefef06950e2f03477282368ca835bbf40ff24 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 21 Sep 2015 23:46:00 -0700
Subject: [PATCH 061/896] [SPARK-10446][SQL] Support to specify join type when
 calling join with usingColumns

JIRA: https://issues.apache.org/jira/browse/SPARK-10446

Currently the method `join(right: DataFrame, usingColumns: Seq[String])` only supports inner join. It is more convenient to have it support other join types.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8600 from viirya/usingcolumns_df.
---
 python/pyspark/sql/dataframe.py               |  6 ++++-
 .../org/apache/spark/sql/DataFrame.scala      | 22 ++++++++++++++++++-
 .../apache/spark/sql/DataFrameJoinSuite.scala | 13 +++++++++++
 3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index fb995fa3a76b..80f8d8a0eb37 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -567,7 +567,11 @@ def join(self, other, on=None, how=None):
         if on is None or len(on) == 0:
             jdf = self._jdf.join(other._jdf)
         elif isinstance(on[0], basestring):
-            jdf = self._jdf.join(other._jdf, self._jseq(on))
+            if how is None:
+                jdf = self._jdf.join(other._jdf, self._jseq(on), "inner")
+            else:
+                assert isinstance(how, basestring), "how should be basestring"
+                jdf = self._jdf.join(other._jdf, self._jseq(on), how)
         else:
             assert isinstance(on[0], Column), "on should be Column or list of Column"
             if len(on) > 1:
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 8f737c202393..ba94d77b2e60 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -484,6 +484,26 @@ class DataFrame private[sql](
    * @since 1.4.0
    */
   def join(right: DataFrame, usingColumns: Seq[String]): DataFrame = {
+    join(right, usingColumns, "inner")
+  }
+
+  /**
+   * Equi-join with another [[DataFrame]] using the given columns.
+   *
+   * Different from other join functions, the join columns will only appear once in the output,
+   * i.e. similar to SQL's `JOIN USING` syntax.
+   *
+   * Note that if you perform a self-join using this function without aliasing the input
+   * [[DataFrame]]s, you will NOT be able to reference any columns after the join, since
+   * there is no way to disambiguate which side of the join you would like to reference.
+   *
+   * @param right Right side of the join operation.
+   * @param usingColumns Names of the columns to join on. This columns must exist on both sides.
+   * @param joinType One of: `inner`, `outer`, `left_outer`, `right_outer`, `leftsemi`.
+   * @group dfops
+   * @since 1.6.0
+   */
+  def join(right: DataFrame, usingColumns: Seq[String], joinType: String): DataFrame = {
     // Analyze the self join. The assumption is that the analyzer will disambiguate left vs right
     // by creating a new instance for one of the branch.
     val joined = sqlContext.executePlan(
@@ -502,7 +522,7 @@ class DataFrame private[sql](
       Join(
         joined.left,
         joined.right,
-        joinType = Inner,
+        joinType = JoinType(joinType),
         condition)
     )
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
index e2716d7841d8..56ad71ea4f48 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameJoinSuite.scala
@@ -42,6 +42,19 @@ class DataFrameJoinSuite extends QueryTest with SharedSQLContext {
       Row(1, 2, "1", "2") :: Row(2, 3, "2", "3") :: Row(3, 4, "3", "4") :: Nil)
   }
 
+  test("join - join using multiple columns and specifying join type") {
+    val df = Seq(1, 2, 3).map(i => (i, i + 1, i.toString)).toDF("int", "int2", "str")
+    val df2 = Seq(1, 2, 3).map(i => (i, i + 1, (i + 1).toString)).toDF("int", "int2", "str")
+
+    checkAnswer(
+      df.join(df2, Seq("int", "str"), "left"),
+      Row(1, 2, "1", null) :: Row(2, 3, "2", null) :: Row(3, 4, "3", null) :: Nil)
+
+    checkAnswer(
+      df.join(df2, Seq("int", "str"), "right"),
+      Row(null, null, null, 2) :: Row(null, null, null, 3) :: Row(null, null, null, 4) :: Nil)
+  }
+
   test("join - join using self join") {
     val df = Seq(1, 2, 3).map(i => (i, i.toString)).toDF("int", "str")
 

From f24316e6d928c263cbf3872edd97982059c3db22 Mon Sep 17 00:00:00 2001
From: Madhusudanan Kandasamy <madhusudanan@in.ibm.com>
Date: Tue, 22 Sep 2015 00:03:48 -0700
Subject: [PATCH 062/896] [SPARK-10458] [SPARK CORE] Added isStopped() method
 in SparkContext

Added isStopped() method in SparkContext

Author: Madhusudanan Kandasamy <madhusudanan@in.ibm.com>

Closes #8749 from kmadhugit/SPARK-10458.
---
 core/src/main/scala/org/apache/spark/SparkContext.scala | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index ebd8e946ee7a..967fec9f42bc 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -265,6 +265,10 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   val tachyonFolderName = externalBlockStoreFolderName
 
   def isLocal: Boolean = (master == "local" || master.startsWith("local["))
+  /**
+   * @return true if context is stopped or in the midst of stopping.
+   */
+  def isStopped: Boolean = stopped.get()
 
   // An asynchronous listener bus for Spark events
   private[spark] val listenerBus = new LiveListenerBus

From fd61b004877ba4d51c95cd0e08f53bffdf106395 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Tue, 22 Sep 2015 00:05:30 -0700
Subject: [PATCH 063/896] [Minor] style fix for previous commit f24316e

---
 core/src/main/scala/org/apache/spark/SparkContext.scala | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 967fec9f42bc..bf3aeb488d59 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -265,6 +265,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   val tachyonFolderName = externalBlockStoreFolderName
 
   def isLocal: Boolean = (master == "local" || master.startsWith("local["))
+
   /**
    * @return true if context is stopped or in the midst of stopping.
    */

From 4da32bc0e747fefe847bffe493785d4d16069c04 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 22 Sep 2015 00:07:30 -0700
Subject: [PATCH 064/896] [SPARK-8567] [SQL] Increase the timeout of
 o.a.s.sql.hive.HiveSparkSubmitSuite to 5 minutes.

https://issues.apache.org/jira/browse/SPARK-8567

Looks like "SPARK-8368: includes jars passed in through --jars" is pretty flaky now. Based on some history runs, the time spent on a successful run may be from 1.5 minutes to almost 3 minutes. Let's try to increase the timeout and see if we can fix this test.

https://amplab.cs.berkeley.edu/jenkins/job/Spark-1.5-SBT/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.0,label=spark-test/385/testReport/junit/org.apache.spark.sql.hive/HiveSparkSubmitSuite/SPARK_8368__includes_jars_passed_in_through___jars/history/?start=25

Author: Yin Huai <yhuai@databricks.com>

Closes #8850 from yhuai/SPARK-8567-anotherTry.
---
 .../scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
index 97df249bdb6d..5f1660b62d41 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
@@ -139,7 +139,7 @@ class HiveSparkSubmitSuite
     new ProcessOutputCapturer(process.getErrorStream, captureOutput("stderr")).start()
 
     try {
-      val exitCode = failAfter(180.seconds) { process.waitFor() }
+      val exitCode = failAfter(300.seconds) { process.waitFor() }
       if (exitCode != 0) {
         // include logs in output. Note that logging is async and may not have completed
         // at the time this exception is raised

From f3b727c801408b1cd50e5d9463f2fe0fce654a16 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 22 Sep 2015 00:09:29 -0700
Subject: [PATCH 065/896] [SQL] [MINOR] map -> foreach.

DataFrame.explain should use foreach to print the explain content.

Author: Reynold Xin <rxin@databricks.com>

Closes #8862 from rxin/map-foreach.
---
 sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index ba94d77b2e60..a11140b71736 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -320,9 +320,8 @@ class DataFrame private[sql](
    * @since 1.3.0
    */
   def explain(extended: Boolean): Unit = {
-    ExplainCommand(
-      queryExecution.logical,
-      extended = extended).queryExecution.executedPlan.executeCollect().map {
+    val explain = ExplainCommand(queryExecution.logical, extended = extended)
+    explain.queryExecution.executedPlan.executeCollect().foreach {
       // scalastyle:off println
       r => println(r.getString(0))
       // scalastyle:on println

From 0bd0e5bed2176b119b3ada590993e153757ea09b Mon Sep 17 00:00:00 2001
From: Akash Mishra <akash.mishra20@gmail.com>
Date: Tue, 22 Sep 2015 00:14:27 -0700
Subject: [PATCH 066/896] =?UTF-8?q?[SPARK-10695]=20[DOCUMENTATION]=20[MESO?=
 =?UTF-8?q?S]=20Fixing=20incorrect=20value=20informati=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…on for spark.mesos.constraints parameter.

Author: Akash Mishra <akash.mishra20@gmail.com>

Closes #8816 from SleepyThread/constraint-fix.
---
 docs/running-on-mesos.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index 460a66f37dd6..ec5a44d79212 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -189,10 +189,10 @@ using `conf.set("spark.cores.max", "10")` (for example).
 You may also make use of `spark.mesos.constraints` to set attribute based constraints on mesos resource offers. By default, all resource offers will be accepted.
 
 {% highlight scala %}
-conf.set("spark.mesos.constraints", "tachyon=true;us-east-1=false")
+conf.set("spark.mesos.constraints", "tachyon:true;us-east-1:false")
 {% endhighlight %}
 
-For example, Let's say `spark.mesos.constraints` is set to `tachyon=true;us-east-1=false`, then the resource offers will be checked to see if they meet both these constraints and only then will be accepted to start new executors.
+For example, Let's say `spark.mesos.constraints` is set to `tachyon:true;us-east-1:false`, then the resource offers will be checked to see if they meet both these constraints and only then will be accepted to start new executors.
 
 # Mesos Docker Support
 

From 7278f792a73bbcf8d68f38dc2d87cf722693c4cf Mon Sep 17 00:00:00 2001
From: Rekha Joshi <rekhajoshm@gmail.com>
Date: Tue, 22 Sep 2015 11:03:21 +0100
Subject: [PATCH 067/896] [SPARK-10718] [BUILD] Update License on conf files
 and corresponding excludes file update

Update License on conf files and corresponding excludes file update

Author: Rekha Joshi <rekhajoshm@gmail.com>
Author: Joshi <rekhajoshm@gmail.com>

Closes #8842 from rekhajoshm/SPARK-10718.
---
 .rat-excludes                                  | 12 ------------
 conf/docker.properties.template                | 17 +++++++++++++++++
 conf/fairscheduler.xml.template                | 18 ++++++++++++++++++
 conf/log4j.properties.template                 | 17 +++++++++++++++++
 conf/metrics.properties.template               | 17 +++++++++++++++++
 conf/slaves.template                           | 17 +++++++++++++++++
 conf/spark-defaults.conf.template              | 17 +++++++++++++++++
 conf/spark-env.sh.template                     | 17 +++++++++++++++++
 .../spark/log4j-defaults-repl.properties       | 17 +++++++++++++++++
 .../org/apache/spark/log4j-defaults.properties | 17 +++++++++++++++++
 10 files changed, 154 insertions(+), 12 deletions(-)

diff --git a/.rat-excludes b/.rat-excludes
index 9165872b9fb2..08fba6d351d6 100644
--- a/.rat-excludes
+++ b/.rat-excludes
@@ -15,20 +15,8 @@ TAGS
 RELEASE
 control
 docs
-docker.properties.template
-fairscheduler.xml.template
-spark-defaults.conf.template
-log4j.properties
-log4j.properties.template
-metrics.properties
-metrics.properties.template
 slaves
-slaves.template
-spark-env.sh
 spark-env.cmd
-spark-env.sh.template
-log4j-defaults.properties
-log4j-defaults-repl.properties
 bootstrap-tooltip.js
 jquery-1.11.1.min.js
 d3.min.js
diff --git a/conf/docker.properties.template b/conf/docker.properties.template
index 26e3bfd9c5b9..55cb094b4af4 100644
--- a/conf/docker.properties.template
+++ b/conf/docker.properties.template
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 spark.mesos.executor.docker.image: <image built from `../docker/spark-mesos/Dockerfile`>
 spark.mesos.executor.docker.volumes: /usr/local/lib:/host/usr/local/lib:ro
 spark.mesos.executor.home: /opt/spark
diff --git a/conf/fairscheduler.xml.template b/conf/fairscheduler.xml.template
index acf59e2a3598..385b2e772d2c 100644
--- a/conf/fairscheduler.xml.template
+++ b/conf/fairscheduler.xml.template
@@ -1,4 +1,22 @@
 <?xml version="1.0"?>
+
+<!--
+   Licensed to the Apache Software Foundation (ASF) under one or more
+   contributor license agreements.  See the NOTICE file distributed with
+   this work for additional information regarding copyright ownership.
+   The ASF licenses this file to You under the Apache License, Version 2.0
+   (the "License"); you may not use this file except in compliance with
+   the License.  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+-->
+
 <allocations>
   <pool name="production">
     <schedulingMode>FAIR</schedulingMode>
diff --git a/conf/log4j.properties.template b/conf/log4j.properties.template
index 74c5cea94403..f3046be54d7c 100644
--- a/conf/log4j.properties.template
+++ b/conf/log4j.properties.template
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Set everything to be logged to the console
 log4j.rootCategory=INFO, console
 log4j.appender.console=org.apache.log4j.ConsoleAppender
diff --git a/conf/metrics.properties.template b/conf/metrics.properties.template
index 7f17bc7eea4f..d6962e0da2f3 100644
--- a/conf/metrics.properties.template
+++ b/conf/metrics.properties.template
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 #  syntax: [instance].sink|source.[name].[options]=[value]
 
 #  This file configures Spark's internal metrics system. The metrics system is
diff --git a/conf/slaves.template b/conf/slaves.template
index da0a01343d20..be42a638230b 100644
--- a/conf/slaves.template
+++ b/conf/slaves.template
@@ -1,2 +1,19 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # A Spark Worker will be started on each of the machines listed below.
 localhost
\ No newline at end of file
diff --git a/conf/spark-defaults.conf.template b/conf/spark-defaults.conf.template
index a48dcc70e136..19cba6e71ed1 100644
--- a/conf/spark-defaults.conf.template
+++ b/conf/spark-defaults.conf.template
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Default system properties included when running spark-submit.
 # This is useful for setting default environmental settings.
 
diff --git a/conf/spark-env.sh.template b/conf/spark-env.sh.template
index c05fe381a36a..990ded420be7 100755
--- a/conf/spark-env.sh.template
+++ b/conf/spark-env.sh.template
@@ -1,5 +1,22 @@
 #!/usr/bin/env bash
 
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # This file is sourced when running various Spark programs.
 # Copy it as spark-env.sh and edit that to configure Spark for your site.
 
diff --git a/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties b/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties
index 689afea64f8d..c85abc35b93b 100644
--- a/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties
+++ b/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Set everything to be logged to the console
 log4j.rootCategory=WARN, console
 log4j.appender.console=org.apache.log4j.ConsoleAppender
diff --git a/core/src/main/resources/org/apache/spark/log4j-defaults.properties b/core/src/main/resources/org/apache/spark/log4j-defaults.properties
index 27006e45e932..d44cc85dcbd8 100644
--- a/core/src/main/resources/org/apache/spark/log4j-defaults.properties
+++ b/core/src/main/resources/org/apache/spark/log4j-defaults.properties
@@ -1,3 +1,20 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 # Set everything to be logged to the console
 log4j.rootCategory=INFO, console
 log4j.appender.console=org.apache.log4j.ConsoleAppender

From 870b8a2edd44c9274c43ca0db4ef5b0998e16fd8 Mon Sep 17 00:00:00 2001
From: Meihua Wu <meihuawu@umich.edu>
Date: Tue, 22 Sep 2015 11:05:24 +0100
Subject: [PATCH 068/896] [SPARK-10706] [MLLIB] Add java wrapper for random
 vector rdd

Add java wrapper for random vector rdd

holdenk srowen

Author: Meihua Wu <meihuawu@umich.edu>

Closes #8841 from rotationsymmetry/SPARK-10706.
---
 .../spark/mllib/random/RandomRDDs.scala       | 42 +++++++++++++++++++
 .../mllib/random/JavaRandomRDDsSuite.java     | 17 ++++++++
 2 files changed, 59 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
index f8ff26b5795b..41d7c4d355f6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
@@ -855,6 +855,48 @@ object RandomRDDs {
       sc, numRows, numCols, numPartitionsOrDefault(sc, numPartitions), generator, seed)
   }
 
+  /**
+   * Java-friendly version of [[RandomRDDs#randomVectorRDD]].
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaVectorRDD(
+      jsc: JavaSparkContext,
+      generator: RandomDataGenerator[Double],
+      numRows: Long,
+      numCols: Int,
+      numPartitions: Int,
+      seed: Long): JavaRDD[Vector] = {
+    randomVectorRDD(jsc.sc, generator, numRows, numCols, numPartitions, seed).toJavaRDD()
+  }
+
+  /**
+   * [[RandomRDDs#randomJavaVectorRDD]] with the default seed.
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaVectorRDD(
+      jsc: JavaSparkContext,
+      generator: RandomDataGenerator[Double],
+      numRows: Long,
+      numCols: Int,
+      numPartitions: Int): JavaRDD[Vector] = {
+    randomVectorRDD(jsc.sc, generator, numRows, numCols, numPartitions).toJavaRDD()
+  }
+
+  /**
+   * [[RandomRDDs#randomJavaVectorRDD]] with the default number of partitions and the default seed.
+   */
+  @DeveloperApi
+  @Since("1.6.0")
+  def randomJavaVectorRDD(
+      jsc: JavaSparkContext,
+      generator: RandomDataGenerator[Double],
+      numRows: Long,
+      numCols: Int): JavaRDD[Vector] = {
+    randomVectorRDD(jsc.sc, generator, numRows, numCols).toJavaRDD()
+  }
+
   /**
    * Returns `numPartitions` if it is positive, or `sc.defaultParallelism` otherwise.
    */
diff --git a/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java b/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
index fce5f6712f46..5728df5aeebd 100644
--- a/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
+++ b/mllib/src/test/java/org/apache/spark/mllib/random/JavaRandomRDDsSuite.java
@@ -246,6 +246,23 @@ public void testArbitrary() {
       Assert.assertEquals(2, rdd.first().length());
     }
   }
+
+  @Test
+  @SuppressWarnings("unchecked")
+  public void testRandomVectorRDD() {
+    UniformGenerator generator = new UniformGenerator();
+    long m = 100L;
+    int n = 10;
+    int p = 2;
+    long seed = 1L;
+    JavaRDD<Vector> rdd1 = randomJavaVectorRDD(sc, generator, m, n);
+    JavaRDD<Vector> rdd2 = randomJavaVectorRDD(sc, generator, m, n, p);
+    JavaRDD<Vector> rdd3 = randomJavaVectorRDD(sc, generator, m, n, p, seed);
+    for (JavaRDD<Vector> rdd: Arrays.asList(rdd1, rdd2, rdd3)) {
+      Assert.assertEquals(m, rdd.count());
+      Assert.assertEquals(n, rdd.first().size());
+    }
+  }
 }
 
 // This is just a test generator, it always returns a string of 42

From f4a3c4e34ce93bcaf29c0a35573932880a8b792b Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Tue, 22 Sep 2015 10:19:08 -0700
Subject: [PATCH 069/896] [SPARK-9962] [ML] Decision Tree training:
 prevNodeIdsForInstances.unpersist() at end of training

NodeIdCache: prevNodeIdsForInstances.unpersist() needs to be called at end of training.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8541 from holdenk/SPARK-9962-decission-tree-training-prevNodeIdsForiNstances-unpersist-at-end-of-training.
---
 .../scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala | 8 ++++----
 .../org/apache/spark/mllib/tree/impl/NodeIdCache.scala    | 4 ++++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
index 488e8e4fb5dc..c5ad8df73fac 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
@@ -164,10 +164,10 @@ private[spark] class NodeIdCache(
         }
       }
     }
-  }
-  if (prevNodeIdsForInstances != null) {
-    // Unpersist the previous one if one exists.
-    prevNodeIdsForInstances.unpersist()
+    if (prevNodeIdsForInstances != null) {
+      // Unpersist the previous one if one exists.
+      prevNodeIdsForInstances.unpersist()
+    }
   }
 }
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
index 8f9eb24b57b5..0abed5411143 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
@@ -166,6 +166,10 @@ private[spark] class NodeIdCache(
         fs.delete(new Path(old.getCheckpointFile.get), true)
       }
     }
+    if (prevNodeIdsForInstances != null) {
+      // Unpersist the previous one if one exists.
+      prevNodeIdsForInstances.unpersist()
+    }
   }
 }
 

From 7104ee0e5dc1290b8b845a0a8ddcdb1875cfd060 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 22 Sep 2015 11:00:33 -0700
Subject: [PATCH 070/896] [SPARK-10750] [ML] ML Param validate should print
 better error information

Currently when you set illegal value for params of array type (such as IntArrayParam, DoubleArrayParam, StringArrayParam), it will throw IllegalArgumentException but with incomprehensible error information.
Take ```VectorSlicer.setNames``` as an example:
```scala
val vectorSlicer = new VectorSlicer().setInputCol("features").setOutputCol("result")
// The value of setNames must be contain distinct elements, so the next line will throw exception.
vectorSlicer.setIndices(Array.empty).setNames(Array("f1", "f4", "f1"))
```
It will throw IllegalArgumentException as:
```
vectorSlicer_b3b4d1a10f43 parameter names given invalid value [Ljava.lang.String;798256c5.
java.lang.IllegalArgumentException: vectorSlicer_b3b4d1a10f43 parameter names given invalid value [Ljava.lang.String;798256c5.
```
We should distinguish the value of array type from primitive type at Param.validate(value: T), and we will get better error information.
```
vectorSlicer_3b744ea277b2 parameter names given invalid value [f1,f4,f1].
java.lang.IllegalArgumentException: vectorSlicer_3b744ea277b2 parameter names given invalid value [f1,f4,f1].
```

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8863 from yanboliang/spark-10750.
---
 .../src/main/scala/org/apache/spark/ml/param/params.scala  | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
index de32b7218c27..48f6269e57e9 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
@@ -65,7 +65,12 @@ class Param[T](val parent: String, val name: String, val doc: String, val isVali
    */
   private[param] def validate(value: T): Unit = {
     if (!isValid(value)) {
-      throw new IllegalArgumentException(s"$parent parameter $name given invalid value $value.")
+      val valueToString = value match {
+        case v: Array[_] => v.mkString("[", ",", "]")
+        case _ => value.toString
+      }
+      throw new IllegalArgumentException(
+        s"$parent parameter $name given invalid value $valueToString.")
     }
   }
 

From 2ea0f2e11b82ef4817c7e6a162ea23da7860b893 Mon Sep 17 00:00:00 2001
From: xutingjun <xutingjun@huawei.com>
Date: Tue, 22 Sep 2015 11:01:32 -0700
Subject: [PATCH 071/896] [SPARK-9585] Delete the input format caching because
 some input format are non thread safe

If we cache the  InputFormat, all tasks on the same executor will share it.
Some InputFormat is thread safety, but some are not, such as HiveHBaseTableInputFormat. If tasks share a non thread safe InputFormat, unexpected error may be occurs.
To avoid it, I think we should delete the input format  caching.

Author: xutingjun <xutingjun@huawei.com>
Author: meiyoula <1039320815@qq.com>
Author: Xutingjun <xutingjun@huawei.com>

Closes #7918 from XuTingjun/cached_inputFormat.
---
 core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
index 8f2655d63b79..77b57132b9f1 100644
--- a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -182,17 +182,11 @@ class HadoopRDD[K, V](
   }
 
   protected def getInputFormat(conf: JobConf): InputFormat[K, V] = {
-    if (HadoopRDD.containsCachedMetadata(inputFormatCacheKey)) {
-      return HadoopRDD.getCachedMetadata(inputFormatCacheKey).asInstanceOf[InputFormat[K, V]]
-    }
-    // Once an InputFormat for this RDD is created, cache it so that only one reflection call is
-    // done in each local process.
     val newInputFormat = ReflectionUtils.newInstance(inputFormatClass.asInstanceOf[Class[_]], conf)
       .asInstanceOf[InputFormat[K, V]]
     if (newInputFormat.isInstanceOf[Configurable]) {
       newInputFormat.asInstanceOf[Configurable].setConf(conf)
     }
-    HadoopRDD.putCachedMetadata(inputFormatCacheKey, newInputFormat)
     newInputFormat
   }
 

From 22d40159e60dd27a428e4051ef607292cbffbff3 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 22 Sep 2015 11:07:01 -0700
Subject: [PATCH 072/896] [SPARK-10593] [SQL] fix resolve output of Generate

The output of Generate should not be resolved as Reference.

Author: Davies Liu <davies@databricks.com>

Closes #8755 from davies/view.
---
 .../spark/sql/catalyst/analysis/Analyzer.scala   | 16 ++++++++++++++++
 .../spark/sql/catalyst/plans/QueryPlan.scala     |  1 -
 .../catalyst/plans/logical/basicOperators.scala  |  2 +-
 .../spark/sql/hive/execution/SQLQuerySuite.scala | 14 ++++++++++++++
 4 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 02f34cbf58ad..bf72d47ce1ea 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -378,6 +378,22 @@ class Analyzer(
         val newOrdering = resolveSortOrders(ordering, child, throws = false)
         Sort(newOrdering, global, child)
 
+      // A special case for Generate, because the output of Generate should not be resolved by
+      // ResolveReferences. Attributes in the output will be resolved by ResolveGenerate.
+      case g @ Generate(generator, join, outer, qualifier, output, child)
+        if child.resolved && !generator.resolved =>
+        val newG = generator transformUp {
+          case u @ UnresolvedAttribute(nameParts) =>
+            withPosition(u) { child.resolve(nameParts, resolver).getOrElse(u) }
+          case UnresolvedExtractValue(child, fieldExpr) =>
+            ExtractValue(child, fieldExpr, resolver)
+        }
+        if (newG.fastEquals(generator)) {
+          g
+        } else {
+          Generate(newG.asInstanceOf[Generator], join, outer, qualifier, output, child)
+        }
+
       case q: LogicalPlan =>
         logTrace(s"Attempting to resolve ${q.simpleString}")
         q transformExpressionsUp  {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
index 55286f9f2fc5..0ec9f0857108 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.sql.catalyst.plans
 
 import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeSet, Expression, VirtualColumn}
-import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.trees.TreeNode
 import org.apache.spark.sql.types.{DataType, StructType}
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 722f69cdca82..ae9482c10f12 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -68,7 +68,7 @@ case class Generate(
     generator.resolved &&
       childrenResolved &&
       generator.elementTypes.length == generatorOutput.length &&
-      !generatorOutput.exists(!_.resolved)
+      generatorOutput.forall(_.resolved)
   }
 
   // we don't want the gOutput to be taken as part of the expressions
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 8126d0233521..bb02473dd17c 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1170,4 +1170,18 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       checkAnswer(sqlContext.table("`db.t`"), df)
     }
   }
+
+  test("SPARK-10593 same column names in lateral view") {
+    val df = sqlContext.sql(
+    """
+      |select
+      |insideLayer2.json as a2
+      |from (select '{"layer1": {"layer2": "text inside layer 2"}}' json) test
+      |lateral view json_tuple(json, 'layer1') insideLayer1 as json
+      |lateral view json_tuple(insideLayer1.json, 'layer2') insideLayer2 as json
+    """.stripMargin
+    )
+
+    checkAnswer(df, Row("text inside layer 2") :: Nil)
+  }
 }

From 1ca5e2e0b8d8d406c02a74c76ae9d7fc5637c8d3 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 22 Sep 2015 11:50:22 -0700
Subject: [PATCH 073/896] [SPARK-10704] Rename HashShuffleReader to
 BlockStoreShuffleReader

The current shuffle code has an interface named ShuffleReader with only one implementation, HashShuffleReader. This naming is confusing, since the same read path code is used for both sort- and hash-based shuffle. This patch addresses this by renaming HashShuffleReader to BlockStoreShuffleReader.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8825 from JoshRosen/shuffle-reader-cleanup.
---
 ...shShuffleReader.scala => BlockStoreShuffleReader.scala} | 5 ++---
 .../org/apache/spark/shuffle/hash/HashShuffleManager.scala | 2 +-
 .../org/apache/spark/shuffle/sort/SortShuffleManager.scala | 3 +--
 ...eaderSuite.scala => BlockStoreShuffleReaderSuite.scala} | 7 +++----
 4 files changed, 7 insertions(+), 10 deletions(-)
 rename core/src/main/scala/org/apache/spark/shuffle/{hash/HashShuffleReader.scala => BlockStoreShuffleReader.scala} (97%)
 rename core/src/test/scala/org/apache/spark/shuffle/{hash/HashShuffleReaderSuite.scala => BlockStoreShuffleReaderSuite.scala} (96%)

diff --git a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleReader.scala b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
similarity index 97%
rename from core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleReader.scala
rename to core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
index 0c8f08f0f3b1..6dc9a16e5853 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleReader.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
@@ -15,16 +15,15 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.hash
+package org.apache.spark.shuffle
 
 import org.apache.spark._
 import org.apache.spark.serializer.Serializer
-import org.apache.spark.shuffle.{BaseShuffleHandle, ShuffleReader}
 import org.apache.spark.storage.{BlockManager, ShuffleBlockFetcherIterator}
 import org.apache.spark.util.CompletionIterator
 import org.apache.spark.util.collection.ExternalSorter
 
-private[spark] class HashShuffleReader[K, C](
+private[spark] class BlockStoreShuffleReader[K, C](
     handle: BaseShuffleHandle[K, _, C],
     startPartition: Int,
     endPartition: Int,
diff --git a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
index 0b46634b8b46..d2e2fc4c110a 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleManager.scala
@@ -51,7 +51,7 @@ private[spark] class HashShuffleManager(conf: SparkConf) extends ShuffleManager
       startPartition: Int,
       endPartition: Int,
       context: TaskContext): ShuffleReader[K, C] = {
-    new HashShuffleReader(
+    new BlockStoreShuffleReader(
       handle.asInstanceOf[BaseShuffleHandle[K, _, C]], startPartition, endPartition, context)
   }
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
index 476cc1f303da..9df4e551669c 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
@@ -21,7 +21,6 @@ import java.util.concurrent.ConcurrentHashMap
 
 import org.apache.spark.{Logging, SparkConf, TaskContext, ShuffleDependency}
 import org.apache.spark.shuffle._
-import org.apache.spark.shuffle.hash.HashShuffleReader
 
 private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager with Logging {
 
@@ -54,7 +53,7 @@ private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager
       endPartition: Int,
       context: TaskContext): ShuffleReader[K, C] = {
     // We currently use the same block store shuffle fetcher as the hash-based shuffle.
-    new HashShuffleReader(
+    new BlockStoreShuffleReader(
       handle.asInstanceOf[BaseShuffleHandle[K, _, C]], startPartition, endPartition, context)
   }
 
diff --git a/core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleReaderSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
similarity index 96%
rename from core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleReaderSuite.scala
rename to core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
index 05b3afef5b83..a5eafb1b5529 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/hash/HashShuffleReaderSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.hash
+package org.apache.spark.shuffle
 
 import java.io.{ByteArrayOutputStream, InputStream}
 import java.nio.ByteBuffer
@@ -28,7 +28,6 @@ import org.mockito.stubbing.Answer
 import org.apache.spark._
 import org.apache.spark.network.buffer.{ManagedBuffer, NioManagedBuffer}
 import org.apache.spark.serializer.JavaSerializer
-import org.apache.spark.shuffle.BaseShuffleHandle
 import org.apache.spark.storage.{BlockManager, BlockManagerId, ShuffleBlockId}
 
 /**
@@ -56,7 +55,7 @@ class RecordingManagedBuffer(underlyingBuffer: NioManagedBuffer) extends Managed
   }
 }
 
-class HashShuffleReaderSuite extends SparkFunSuite with LocalSparkContext {
+class BlockStoreShuffleReaderSuite extends SparkFunSuite with LocalSparkContext {
 
   /**
    * This test makes sure that, when data is read from a HashShuffleReader, the underlying
@@ -134,7 +133,7 @@ class HashShuffleReaderSuite extends SparkFunSuite with LocalSparkContext {
       new BaseShuffleHandle(shuffleId, numMaps, dependency)
     }
 
-    val shuffleReader = new HashShuffleReader(
+    val shuffleReader = new BlockStoreShuffleReader(
       shuffleHandle,
       reduceId,
       reduceId + 1,

From 5017c685f484ec256101d1d33bad11d9e0c0f641 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Tue, 22 Sep 2015 12:14:15 -0700
Subject: [PATCH 074/896] [SPARK-10740] [SQL] handle nondeterministic
 expressions correctly for set operations

https://issues.apache.org/jira/browse/SPARK-10740

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8858 from cloud-fan/non-deter.
---
 .../sql/catalyst/optimizer/Optimizer.scala    | 69 ++++++++++++++-----
 .../optimizer/SetOperationPushDownSuite.scala |  3 +-
 .../org/apache/spark/sql/DataFrameSuite.scala | 41 +++++++++++
 3 files changed, 93 insertions(+), 20 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 324f40a051c3..63602eaa8ccd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -95,14 +95,14 @@ object SamplePushDown extends Rule[LogicalPlan] {
  * Intersect:
  * It is not safe to pushdown Projections through it because we need to get the
  * intersect of rows by comparing the entire rows. It is fine to pushdown Filters
- * because we will not have non-deterministic expressions.
+ * with deterministic condition.
  *
  * Except:
  * It is not safe to pushdown Projections through it because we need to get the
  * intersect of rows by comparing the entire rows. It is fine to pushdown Filters
- * because we will not have non-deterministic expressions.
+ * with deterministic condition.
  */
-object SetOperationPushDown extends Rule[LogicalPlan] {
+object SetOperationPushDown extends Rule[LogicalPlan] with PredicateHelper {
 
   /**
    * Maps Attributes from the left side to the corresponding Attribute on the right side.
@@ -129,34 +129,65 @@ object SetOperationPushDown extends Rule[LogicalPlan] {
     result.asInstanceOf[A]
   }
 
+  /**
+   * Splits the condition expression into small conditions by `And`, and partition them by
+   * deterministic, and finally recombine them by `And`. It returns an expression containing
+   * all deterministic expressions (the first field of the returned Tuple2) and an expression
+   * containing all non-deterministic expressions (the second field of the returned Tuple2).
+   */
+  private def partitionByDeterministic(condition: Expression): (Expression, Expression) = {
+    val andConditions = splitConjunctivePredicates(condition)
+    andConditions.partition(_.deterministic) match {
+      case (deterministic, nondeterministic) =>
+        deterministic.reduceOption(And).getOrElse(Literal(true)) ->
+        nondeterministic.reduceOption(And).getOrElse(Literal(true))
+    }
+  }
+
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
     // Push down filter into union
     case Filter(condition, u @ Union(left, right)) =>
+      val (deterministic, nondeterministic) = partitionByDeterministic(condition)
       val rewrites = buildRewrites(u)
-      Union(
-        Filter(condition, left),
-        Filter(pushToRight(condition, rewrites), right))
-
-    // Push down projection through UNION ALL
-    case Project(projectList, u @ Union(left, right)) =>
-      val rewrites = buildRewrites(u)
-      Union(
-        Project(projectList, left),
-        Project(projectList.map(pushToRight(_, rewrites)), right))
+      Filter(nondeterministic,
+        Union(
+          Filter(deterministic, left),
+          Filter(pushToRight(deterministic, rewrites), right)
+        )
+      )
+
+    // Push down deterministic projection through UNION ALL
+    case p @ Project(projectList, u @ Union(left, right)) =>
+      if (projectList.forall(_.deterministic)) {
+        val rewrites = buildRewrites(u)
+        Union(
+          Project(projectList, left),
+          Project(projectList.map(pushToRight(_, rewrites)), right))
+      } else {
+        p
+      }
 
     // Push down filter through INTERSECT
     case Filter(condition, i @ Intersect(left, right)) =>
+      val (deterministic, nondeterministic) = partitionByDeterministic(condition)
       val rewrites = buildRewrites(i)
-      Intersect(
-        Filter(condition, left),
-        Filter(pushToRight(condition, rewrites), right))
+      Filter(nondeterministic,
+        Intersect(
+          Filter(deterministic, left),
+          Filter(pushToRight(deterministic, rewrites), right)
+        )
+      )
 
     // Push down filter through EXCEPT
     case Filter(condition, e @ Except(left, right)) =>
+      val (deterministic, nondeterministic) = partitionByDeterministic(condition)
       val rewrites = buildRewrites(e)
-      Except(
-        Filter(condition, left),
-        Filter(pushToRight(condition, rewrites), right))
+      Filter(nondeterministic,
+        Except(
+          Filter(deterministic, left),
+          Filter(pushToRight(deterministic, rewrites), right)
+        )
+      )
   }
 }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
index 3fca47a023dc..1595ad932742 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/SetOperationPushDownSuite.scala
@@ -30,7 +30,8 @@ class SetOperationPushDownSuite extends PlanTest {
       Batch("Subqueries", Once,
         EliminateSubQueries) ::
       Batch("Union Pushdown", Once,
-        SetOperationPushDown) :: Nil
+        SetOperationPushDown,
+        SimplifyFilters) :: Nil
   }
 
   val testRelation = LocalRelation('a.int, 'b.int, 'c.int)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 1370713975f2..d919877746c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -916,4 +916,45 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     assert(intersect.count() === 30)
     assert(except.count() === 70)
   }
+
+  test("SPARK-10740: handle nondeterministic expressions correctly for set operations") {
+    val df1 = (1 to 20).map(Tuple1.apply).toDF("i")
+    val df2 = (1 to 10).map(Tuple1.apply).toDF("i")
+
+    // When generating expected results at here, we need to follow the implementation of
+    // Rand expression.
+    def expected(df: DataFrame): Seq[Row] = {
+      df.rdd.collectPartitions().zipWithIndex.flatMap {
+        case (data, index) =>
+          val rng = new org.apache.spark.util.random.XORShiftRandom(7 + index)
+          data.filter(_.getInt(0) < rng.nextDouble() * 10)
+      }
+    }
+
+    val union = df1.unionAll(df2)
+    checkAnswer(
+      union.filter('i < rand(7) * 10),
+      expected(union)
+    )
+    checkAnswer(
+      union.select(rand(7)),
+      union.rdd.collectPartitions().zipWithIndex.flatMap {
+        case (data, index) =>
+          val rng = new org.apache.spark.util.random.XORShiftRandom(7 + index)
+          data.map(_ => rng.nextDouble()).map(i => Row(i))
+      }
+    )
+
+    val intersect = df1.intersect(df2)
+    checkAnswer(
+      intersect.filter('i < rand(7) * 10),
+      expected(intersect)
+    )
+
+    val except = df1.except(df2)
+    checkAnswer(
+      except.filter('i < rand(7) * 10),
+      expected(except)
+    )
+  }
 }

From 2204cdb28483b249616068085d4e88554fe6acef Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 22 Sep 2015 13:29:39 -0700
Subject: [PATCH 075/896] [SPARK-10672] [SQL] Do not fail when we cannot save
 the metadata of a data source table in a hive compatible way

https://issues.apache.org/jira/browse/SPARK-10672

With changes in this PR, we will fallback to same the metadata of a table in Spark SQL specific way if we fail to save it in a hive compatible way (Hive throws an exception because of its internal restrictions, e.g. binary and decimal types cannot be saved to parquet if the metastore is running Hive 0.13). I manually tested the fix with the following test in `DataSourceWithHiveMetastoreCatalogSuite` (`spark.sql.hive.metastore.version=0.13` and `spark.sql.hive.metastore.jars`=`maven`).

```
    test(s"fail to save metadata of a parquet table in hive 0.13") {
      withTempPath { dir =>
        withTable("t") {
          val path = dir.getCanonicalPath

          sql(
            s"""CREATE TABLE t USING $provider
               |OPTIONS (path '$path')
               |AS SELECT 1 AS d1, cast("val_1" as binary) AS d2
             """.stripMargin)

          sql(
            s"""describe formatted t
             """.stripMargin).collect.foreach(println)

          sqlContext.table("t").show
        }
      }
    }
  }
```

Without this fix, we will fail with the following error.
```
org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.UnsupportedOperationException: Unknown field type: binary
	at org.apache.hadoop.hive.ql.metadata.Hive.createTable(Hive.java:619)
	at org.apache.hadoop.hive.ql.metadata.Hive.createTable(Hive.java:576)
	at org.apache.spark.sql.hive.client.ClientWrapper$$anonfun$createTable$1.apply$mcV$sp(ClientWrapper.scala:359)
	at org.apache.spark.sql.hive.client.ClientWrapper$$anonfun$createTable$1.apply(ClientWrapper.scala:357)
	at org.apache.spark.sql.hive.client.ClientWrapper$$anonfun$createTable$1.apply(ClientWrapper.scala:357)
	at org.apache.spark.sql.hive.client.ClientWrapper$$anonfun$withHiveState$1.apply(ClientWrapper.scala:256)
	at org.apache.spark.sql.hive.client.ClientWrapper.retryLocked(ClientWrapper.scala:211)
	at org.apache.spark.sql.hive.client.ClientWrapper.withHiveState(ClientWrapper.scala:248)
	at org.apache.spark.sql.hive.client.ClientWrapper.createTable(ClientWrapper.scala:357)
	at org.apache.spark.sql.hive.HiveMetastoreCatalog.createDataSourceTable(HiveMetastoreCatalog.scala:358)
	at org.apache.spark.sql.hive.execution.CreateMetastoreDataSourceAsSelect.run(commands.scala:285)
	at org.apache.spark.sql.execution.ExecutedCommand.sideEffectResult$lzycompute(commands.scala:57)
	at org.apache.spark.sql.execution.ExecutedCommand.sideEffectResult(commands.scala:57)
	at org.apache.spark.sql.execution.ExecutedCommand.doExecute(commands.scala:69)
	at org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$5.apply(SparkPlan.scala:140)
	at org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$5.apply(SparkPlan.scala:138)
	at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:150)
	at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:138)
	at org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:58)
	at org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:58)
	at org.apache.spark.sql.DataFrame.<init>(DataFrame.scala:144)
	at org.apache.spark.sql.DataFrame.<init>(DataFrame.scala:129)
	at org.apache.spark.sql.DataFrame$.apply(DataFrame.scala:51)
	at org.apache.spark.sql.SQLContext.sql(SQLContext.scala:725)
	at org.apache.spark.sql.test.SQLTestUtils$$anonfun$sql$1.apply(SQLTestUtils.scala:56)
	at org.apache.spark.sql.test.SQLTestUtils$$anonfun$sql$1.apply(SQLTestUtils.scala:56)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1$$anonfun$apply$mcV$sp$2$$anonfun$apply$2.apply$mcV$sp(HiveMetastoreCatalogSuite.scala:165)
	at org.apache.spark.sql.test.SQLTestUtils$class.withTable(SQLTestUtils.scala:150)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite.withTable(HiveMetastoreCatalogSuite.scala:52)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1$$anonfun$apply$mcV$sp$2.apply(HiveMetastoreCatalogSuite.scala:162)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1$$anonfun$apply$mcV$sp$2.apply(HiveMetastoreCatalogSuite.scala:161)
	at org.apache.spark.sql.test.SQLTestUtils$class.withTempPath(SQLTestUtils.scala:125)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite.withTempPath(HiveMetastoreCatalogSuite.scala:52)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1.apply$mcV$sp(HiveMetastoreCatalogSuite.scala:161)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1.apply(HiveMetastoreCatalogSuite.scala:161)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite$$anonfun$4$$anonfun$apply$1.apply(HiveMetastoreCatalogSuite.scala:161)
	at org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
	at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
	at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
	at org.scalatest.Transformer.apply(Transformer.scala:22)
	at org.scalatest.Transformer.apply(Transformer.scala:20)
	at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:166)
	at org.apache.spark.SparkFunSuite.withFixture(SparkFunSuite.scala:42)
	at org.scalatest.FunSuiteLike$class.invokeWithFixture$1(FunSuiteLike.scala:163)
	at org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
	at org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
	at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
	at org.scalatest.FunSuiteLike$class.runTest(FunSuiteLike.scala:175)
	at org.scalatest.FunSuite.runTest(FunSuite.scala:1555)
	at org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
	at org.scalatest.FunSuiteLike$$anonfun$runTests$1.apply(FunSuiteLike.scala:208)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:413)
	at org.scalatest.SuperEngine$$anonfun$traverseSubNodes$1$1.apply(Engine.scala:401)
	at scala.collection.immutable.List.foreach(List.scala:318)
	at org.scalatest.SuperEngine.traverseSubNodes$1(Engine.scala:401)
	at org.scalatest.SuperEngine.org$scalatest$SuperEngine$$runTestsInBranch(Engine.scala:396)
	at org.scalatest.SuperEngine.runTestsImpl(Engine.scala:483)
	at org.scalatest.FunSuiteLike$class.runTests(FunSuiteLike.scala:208)
	at org.scalatest.FunSuite.runTests(FunSuite.scala:1555)
	at org.scalatest.Suite$class.run(Suite.scala:1424)
	at org.scalatest.FunSuite.org$scalatest$FunSuiteLike$$super$run(FunSuite.scala:1555)
	at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
	at org.scalatest.FunSuiteLike$$anonfun$run$1.apply(FunSuiteLike.scala:212)
	at org.scalatest.SuperEngine.runImpl(Engine.scala:545)
	at org.scalatest.FunSuiteLike$class.run(FunSuiteLike.scala:212)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite.org$scalatest$BeforeAndAfterAll$$super$run(HiveMetastoreCatalogSuite.scala:52)
	at org.scalatest.BeforeAndAfterAll$class.liftedTree1$1(BeforeAndAfterAll.scala:257)
	at org.scalatest.BeforeAndAfterAll$class.run(BeforeAndAfterAll.scala:256)
	at org.apache.spark.sql.hive.DataSourceWithHiveMetastoreCatalogSuite.run(HiveMetastoreCatalogSuite.scala:52)
	at org.scalatest.tools.Framework.org$scalatest$tools$Framework$$runSuite(Framework.scala:462)
	at org.scalatest.tools.Framework$ScalaTestTask.execute(Framework.scala:671)
	at sbt.ForkMain$Run$2.call(ForkMain.java:294)
	at sbt.ForkMain$Run$2.call(ForkMain.java:284)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedOperationException: Unknown field type: binary
	at org.apache.hadoop.hive.ql.io.parquet.serde.ArrayWritableObjectInspector.getObjectInspector(ArrayWritableObjectInspector.java:108)
	at org.apache.hadoop.hive.ql.io.parquet.serde.ArrayWritableObjectInspector.<init>(ArrayWritableObjectInspector.java:60)
	at org.apache.hadoop.hive.ql.io.parquet.serde.ParquetHiveSerDe.initialize(ParquetHiveSerDe.java:113)
	at org.apache.hadoop.hive.metastore.MetaStoreUtils.getDeserializer(MetaStoreUtils.java:339)
	at org.apache.hadoop.hive.ql.metadata.Table.getDeserializerFromMetaStore(Table.java:288)
	at org.apache.hadoop.hive.ql.metadata.Table.checkValidity(Table.java:194)
	at org.apache.hadoop.hive.ql.metadata.Hive.createTable(Hive.java:597)
	... 76 more
```

Author: Yin Huai <yhuai@databricks.com>

Closes #8824 from yhuai/datasourceMetadata.
---
 .../spark/sql/hive/HiveMetastoreCatalog.scala | 101 +++++++++---------
 1 file changed, 50 insertions(+), 51 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index 0c1b41e3377e..012634cb5aeb 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -309,69 +309,68 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
     }
 
     // TODO: Support persisting partitioned data source relations in Hive compatible format
-    val hiveTable = (maybeSerDe, dataSource.relation) match {
+    val qualifiedTableName = tableIdent.quotedString
+    val (hiveCompitiableTable, logMessage) = (maybeSerDe, dataSource.relation) match {
       case (Some(serde), relation: HadoopFsRelation)
-          if relation.paths.length == 1 && relation.partitionColumns.isEmpty =>
-        // Hive ParquetSerDe doesn't support decimal type until 1.2.0.
-        val isParquetSerDe = serde.inputFormat.exists(_.toLowerCase.contains("parquet"))
-        val hasDecimalFields = relation.schema.existsRecursively(_.isInstanceOf[DecimalType])
-
-        val hiveParquetSupportsDecimal = client.version match {
-          case org.apache.spark.sql.hive.client.hive.v1_2 => true
-          case _ => false
-        }
-
-        if (isParquetSerDe && !hiveParquetSupportsDecimal && hasDecimalFields) {
-          // If Hive version is below 1.2.0, we cannot save Hive compatible schema to
-          // metastore when the file format is Parquet and the schema has DecimalType.
-          logWarning {
-            "Persisting Parquet relation with decimal field(s) into Hive metastore in Spark SQL " +
-              "specific format, which is NOT compatible with Hive. Because ParquetHiveSerDe in " +
-              s"Hive ${client.version.fullVersion} doesn't support decimal type. See HIVE-6384."
-          }
-          newSparkSQLSpecificMetastoreTable()
-        } else {
-          logInfo {
-            "Persisting data source relation with a single input path into Hive metastore in " +
-              s"Hive compatible format. Input path: ${relation.paths.head}"
-          }
-          newHiveCompatibleMetastoreTable(relation, serde)
-        }
+        if relation.paths.length == 1 && relation.partitionColumns.isEmpty =>
+        val hiveTable = newHiveCompatibleMetastoreTable(relation, serde)
+        val message =
+          s"Persisting data source relation $qualifiedTableName with a single input path " +
+            s"into Hive metastore in Hive compatible format. Input path: ${relation.paths.head}."
+        (Some(hiveTable), message)
 
       case (Some(serde), relation: HadoopFsRelation) if relation.partitionColumns.nonEmpty =>
-        logWarning {
-          "Persisting partitioned data source relation into Hive metastore in " +
-            s"Spark SQL specific format, which is NOT compatible with Hive.  Input path(s): " +
-            relation.paths.mkString("\n", "\n", "")
-        }
-        newSparkSQLSpecificMetastoreTable()
+        val message =
+          s"Persisting partitioned data source relation $qualifiedTableName into " +
+            "Hive metastore in Spark SQL specific format, which is NOT compatible with Hive. " +
+            "Input path(s): " + relation.paths.mkString("\n", "\n", "")
+        (None, message)
 
       case (Some(serde), relation: HadoopFsRelation) =>
-        logWarning {
-          "Persisting data source relation with multiple input paths into Hive metastore in " +
-            s"Spark SQL specific format, which is NOT compatible with Hive.  Input paths: " +
-            relation.paths.mkString("\n", "\n", "")
-        }
-        newSparkSQLSpecificMetastoreTable()
+        val message =
+          s"Persisting data source relation $qualifiedTableName with multiple input paths into " +
+            "Hive metastore in Spark SQL specific format, which is NOT compatible with Hive. " +
+            s"Input paths: " + relation.paths.mkString("\n", "\n", "")
+        (None, message)
 
       case (Some(serde), _) =>
-        logWarning {
-          s"Data source relation is not a ${classOf[HadoopFsRelation].getSimpleName}. " +
-            "Persisting it into Hive metastore in Spark SQL specific format, " +
-            "which is NOT compatible with Hive."
-        }
-        newSparkSQLSpecificMetastoreTable()
+        val message =
+          s"Data source relation $qualifiedTableName is not a " +
+            s"${classOf[HadoopFsRelation].getSimpleName}. Persisting it into Hive metastore " +
+            "in Spark SQL specific format, which is NOT compatible with Hive."
+        (None, message)
 
       case _ =>
-        logWarning {
+        val message =
           s"Couldn't find corresponding Hive SerDe for data source provider $provider. " +
-            "Persisting data source relation into Hive metastore in Spark SQL specific format, " +
-            "which is NOT compatible with Hive."
-        }
-        newSparkSQLSpecificMetastoreTable()
+            s"Persisting data source relation $qualifiedTableName into Hive metastore in " +
+            s"Spark SQL specific format, which is NOT compatible with Hive."
+        (None, message)
     }
 
-    client.createTable(hiveTable)
+    (hiveCompitiableTable, logMessage) match {
+      case (Some(table), message) =>
+        // We first try to save the metadata of the table in a Hive compatiable way.
+        // If Hive throws an error, we fall back to save its metadata in the Spark SQL
+        // specific way.
+        try {
+          logInfo(message)
+          client.createTable(table)
+        } catch {
+          case throwable: Throwable =>
+            val warningMessage =
+              s"Could not persist $qualifiedTableName in a Hive compatible way. Persisting " +
+                s"it into Hive metastore in Spark SQL specific format."
+            logWarning(warningMessage, throwable)
+            val sparkSqlSpecificTable = newSparkSQLSpecificMetastoreTable()
+            client.createTable(sparkSqlSpecificTable)
+        }
+
+      case (None, message) =>
+        logWarning(message)
+        val hiveTable = newSparkSQLSpecificMetastoreTable()
+        client.createTable(hiveTable)
+    }
   }
 
   def hiveDefaultTableFilePath(tableName: String): String = {

From 5aea987c904b281d7952ad8db40a32561b4ec5cf Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 22 Sep 2015 13:31:35 -0700
Subject: [PATCH 076/896] [SPARK-10737] [SQL] When using UnsafeRows,
 SortMergeJoin may return wrong results

https://issues.apache.org/jira/browse/SPARK-10737

Author: Yin Huai <yhuai@databricks.com>

Closes #8854 from yhuai/SMJBug.
---
 .../codegen/GenerateProjection.scala          |  2 ++
 .../apache/spark/sql/execution/Window.scala   |  9 ++++--
 .../sql/execution/joins/SortMergeJoin.scala   | 25 +++++++++++++++--
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 28 +++++++++++++++++++
 4 files changed, 59 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
index 2164ddf03d1b..75524b568d68 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
@@ -171,6 +171,8 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
 
       @Override
       public Object apply(Object r) {
+        // GenerateProjection does not work with UnsafeRows.
+        assert(!(r instanceof ${classOf[UnsafeRow].getName}));
         return new SpecificRow((InternalRow) r);
       }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
index 0269d6d4b7a1..f8929530c503 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
@@ -253,7 +253,11 @@ case class Window(
 
         // Get all relevant projections.
         val result = createResultProjection(unboundExpressions)
-        val grouping = newProjection(partitionSpec, child.output)
+        val grouping = if (child.outputsUnsafeRows) {
+          UnsafeProjection.create(partitionSpec, child.output)
+        } else {
+          newProjection(partitionSpec, child.output)
+        }
 
         // Manage the stream and the grouping.
         var nextRow: InternalRow = EmptyRow
@@ -277,7 +281,8 @@ case class Window(
         val numFrames = frames.length
         private[this] def fetchNextPartition() {
           // Collect all the rows in the current partition.
-          val currentGroup = nextGroup
+          // Before we start to fetch new input rows, make a copy of nextGroup.
+          val currentGroup = nextGroup.copy()
           rows = new CompactBuffer
           while (nextRowAvailable && nextGroup == currentGroup) {
             rows += nextRow.copy()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
index 906f20d2a728..70a1af6a7063 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
@@ -56,9 +56,6 @@ case class SortMergeJoin(
   override def requiredChildOrdering: Seq[Seq[SortOrder]] =
     requiredOrders(leftKeys) :: requiredOrders(rightKeys) :: Nil
 
-  @transient protected lazy val leftKeyGenerator = newProjection(leftKeys, left.output)
-  @transient protected lazy val rightKeyGenerator = newProjection(rightKeys, right.output)
-
   protected[this] def isUnsafeMode: Boolean = {
     (codegenEnabled && unsafeEnabled
       && UnsafeProjection.canSupport(leftKeys)
@@ -82,6 +79,28 @@ case class SortMergeJoin(
 
     left.execute().zipPartitions(right.execute()) { (leftIter, rightIter) =>
       new RowIterator {
+        // The projection used to extract keys from input rows of the left child.
+        private[this] val leftKeyGenerator = {
+          if (isUnsafeMode) {
+            // It is very important to use UnsafeProjection if input rows are UnsafeRows.
+            // Otherwise, GenerateProjection will cause wrong results.
+            UnsafeProjection.create(leftKeys, left.output)
+          } else {
+            newProjection(leftKeys, left.output)
+          }
+        }
+
+        // The projection used to extract keys from input rows of the right child.
+        private[this] val rightKeyGenerator = {
+          if (isUnsafeMode) {
+            // It is very important to use UnsafeProjection if input rows are UnsafeRows.
+            // Otherwise, GenerateProjection will cause wrong results.
+            UnsafeProjection.create(rightKeys, right.output)
+          } else {
+            newProjection(rightKeys, right.output)
+          }
+        }
+
         // An ordering that can be used to compare keys from both sides.
         private[this] val keyOrdering = newNaturalAscendingOrdering(leftKeys.map(_.dataType))
         private[this] var currentLeftRow: InternalRow = _
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 05b4127cbcaf..eca6f1073889 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1781,4 +1781,32 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         Seq(Row(1), Row(1)))
     }
   }
+
+  test("SortMergeJoin returns wrong results when using UnsafeRows") {
+    // This test is for the fix of https://issues.apache.org/jira/browse/SPARK-10737.
+    // This bug will be triggered when Tungsten is enabled and there are multiple
+    // SortMergeJoin operators executed in the same task.
+    val confs =
+      SQLConf.SORTMERGE_JOIN.key -> "true" ::
+        SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "1" ::
+        SQLConf.TUNGSTEN_ENABLED.key -> "true" :: Nil
+    withSQLConf(confs: _*) {
+      val df1 = (1 to 50).map(i => (s"str_$i", i)).toDF("i", "j")
+      val df2 =
+        df1
+          .join(df1.select(df1("i")), "i")
+          .select(df1("i"), df1("j"))
+
+      val df3 = df2.withColumnRenamed("i", "i1").withColumnRenamed("j", "j1")
+      val df4 =
+        df2
+          .join(df3, df2("i") === df3("i1"))
+          .withColumn("diff", $"j" - $"j1")
+          .select(df2("i"), df2("j"), $"diff")
+
+      checkAnswer(
+        df4,
+        df1.withColumn("diff", lit(0)))
+    }
+  }
 }

From a96ba40f7ee1352288ea676d8844e1c8174202eb Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 22 Sep 2015 14:11:46 -0700
Subject: [PATCH 077/896] [SPARK-10714] [SPARK-8632] [SPARK-10685] [SQL]
 Refactor Python UDF handling

This patch refactors Python UDF handling:

1. Extract the per-partition Python UDF calling logic from PythonRDD into a PythonRunner. PythonRunner itself expects iterator as input/output, and thus has no dependency on RDD. This way, we can use PythonRunner directly in a mapPartitions call, or in the future in an environment without RDDs.
2. Use PythonRunner in Spark SQL's BatchPythonEvaluation.
3. Updated BatchPythonEvaluation to only use its input once, rather than twice. This should fix Python UDF performance regression in Spark 1.5.

There are a number of small cleanups I wanted to do when I looked at the code, but I kept most of those out so the diff looks small.

This basically implements the approach in https://github.com/apache/spark/pull/8833, but with some code moving around so the correctness doesn't depend on the inner workings of Spark serialization and task execution.

Author: Reynold Xin <rxin@databricks.com>

Closes #8835 from rxin/python-iter-refactor.
---
 .../apache/spark/api/python/PythonRDD.scala   | 54 ++++++++++---
 .../spark/sql/execution/pythonUDFs.scala      | 80 +++++++++++--------
 2 files changed, 89 insertions(+), 45 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
index 69da180593bb..3788d1829758 100644
--- a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
@@ -24,6 +24,7 @@ import java.util.{Collections, ArrayList => JArrayList, List => JList, Map => JM
 import scala.collection.JavaConverters._
 import scala.collection.mutable
 import scala.language.existentials
+import scala.util.control.NonFatal
 
 import com.google.common.base.Charsets.UTF_8
 import org.apache.hadoop.conf.Configuration
@@ -38,7 +39,6 @@ import org.apache.spark.input.PortableDataStream
 import org.apache.spark.rdd.RDD
 import org.apache.spark.util.{SerializableConfiguration, Utils}
 
-import scala.util.control.NonFatal
 
 private[spark] class PythonRDD(
     parent: RDD[_],
@@ -61,11 +61,39 @@ private[spark] class PythonRDD(
     if (preservePartitoning) firstParent.partitioner else None
   }
 
+  val asJavaRDD: JavaRDD[Array[Byte]] = JavaRDD.fromRDD(this)
+
   override def compute(split: Partition, context: TaskContext): Iterator[Array[Byte]] = {
+    val runner = new PythonRunner(
+      command, envVars, pythonIncludes, pythonExec, pythonVer, broadcastVars, accumulator,
+      bufferSize, reuse_worker)
+    runner.compute(firstParent.iterator(split, context), split.index, context)
+  }
+}
+
+
+/**
+ * A helper class to run Python UDFs in Spark.
+ */
+private[spark] class PythonRunner(
+    command: Array[Byte],
+    envVars: JMap[String, String],
+    pythonIncludes: JList[String],
+    pythonExec: String,
+    pythonVer: String,
+    broadcastVars: JList[Broadcast[PythonBroadcast]],
+    accumulator: Accumulator[JList[Array[Byte]]],
+    bufferSize: Int,
+    reuse_worker: Boolean)
+  extends Logging {
+
+  def compute(
+      inputIterator: Iterator[_],
+      partitionIndex: Int,
+      context: TaskContext): Iterator[Array[Byte]] = {
     val startTime = System.currentTimeMillis
     val env = SparkEnv.get
-    val localdir = env.blockManager.diskBlockManager.localDirs.map(
-      f => f.getPath()).mkString(",")
+    val localdir = env.blockManager.diskBlockManager.localDirs.map(f => f.getPath()).mkString(",")
     envVars.put("SPARK_LOCAL_DIRS", localdir) // it's also used in monitor thread
     if (reuse_worker) {
       envVars.put("SPARK_REUSE_WORKER", "1")
@@ -75,7 +103,7 @@ private[spark] class PythonRDD(
     @volatile var released = false
 
     // Start a thread to feed the process input from our parent's iterator
-    val writerThread = new WriterThread(env, worker, split, context)
+    val writerThread = new WriterThread(env, worker, inputIterator, partitionIndex, context)
 
     context.addTaskCompletionListener { context =>
       writerThread.shutdownOnTaskCompletion()
@@ -183,13 +211,16 @@ private[spark] class PythonRDD(
     new InterruptibleIterator(context, stdoutIterator)
   }
 
-  val asJavaRDD : JavaRDD[Array[Byte]] = JavaRDD.fromRDD(this)
-
   /**
    * The thread responsible for writing the data from the PythonRDD's parent iterator to the
    * Python process.
    */
-  class WriterThread(env: SparkEnv, worker: Socket, split: Partition, context: TaskContext)
+  class WriterThread(
+      env: SparkEnv,
+      worker: Socket,
+      inputIterator: Iterator[_],
+      partitionIndex: Int,
+      context: TaskContext)
     extends Thread(s"stdout writer for $pythonExec") {
 
     @volatile private var _exception: Exception = null
@@ -211,11 +242,11 @@ private[spark] class PythonRDD(
         val stream = new BufferedOutputStream(worker.getOutputStream, bufferSize)
         val dataOut = new DataOutputStream(stream)
         // Partition index
-        dataOut.writeInt(split.index)
+        dataOut.writeInt(partitionIndex)
         // Python version of driver
         PythonRDD.writeUTF(pythonVer, dataOut)
         // sparkFilesDir
-        PythonRDD.writeUTF(SparkFiles.getRootDirectory, dataOut)
+        PythonRDD.writeUTF(SparkFiles.getRootDirectory(), dataOut)
         // Python includes (*.zip and *.egg files)
         dataOut.writeInt(pythonIncludes.size())
         for (include <- pythonIncludes.asScala) {
@@ -246,7 +277,7 @@ private[spark] class PythonRDD(
         dataOut.writeInt(command.length)
         dataOut.write(command)
         // Data values
-        PythonRDD.writeIteratorToStream(firstParent.iterator(split, context), dataOut)
+        PythonRDD.writeIteratorToStream(inputIterator, dataOut)
         dataOut.writeInt(SpecialLengths.END_OF_DATA_SECTION)
         dataOut.writeInt(SpecialLengths.END_OF_STREAM)
         dataOut.flush()
@@ -327,7 +358,8 @@ private[spark] object PythonRDD extends Logging {
 
   // remember the broadcasts sent to each worker
   private val workerBroadcasts = new mutable.WeakHashMap[Socket, mutable.Set[Long]]()
-  private def getWorkerBroadcasts(worker: Socket) = {
+
+  def getWorkerBroadcasts(worker: Socket): mutable.Set[Long] = {
     synchronized {
       workerBroadcasts.getOrElseUpdate(worker, new mutable.HashSet[Long]())
     }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
index d0411da6fdf5..c35c726bfc50 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
@@ -25,7 +25,7 @@ import scala.collection.JavaConverters._
 import net.razorvine.pickle._
 
 import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.api.python.{PythonBroadcast, PythonRDD, SerDeUtil}
+import org.apache.spark.api.python.{PythonRunner, PythonBroadcast, PythonRDD, SerDeUtil}
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
@@ -35,7 +35,7 @@ import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.{Accumulator, Logging => SparkLogging}
+import org.apache.spark.{Logging => SparkLogging, TaskContext, Accumulator}
 
 /**
  * A serialized version of a Python lambda function.  Suitable for use in a [[PythonRDD]].
@@ -329,7 +329,13 @@ case class EvaluatePython(
 /**
  * :: DeveloperApi ::
  * Uses PythonRDD to evaluate a [[PythonUDF]], one partition of tuples at a time.
- * The input data is zipped with the result of the udf evaluation.
+ *
+ * Python evaluation works by sending the necessary (projected) input data via a socket to an
+ * external Python process, and combine the result from the Python process with the original row.
+ *
+ * For each row we send to Python, we also put it in a queue. For each output row from Python,
+ * we drain the queue to find the original input row. Note that if the Python process is way too
+ * slow, this could lead to the queue growing unbounded and eventually run out of memory.
  */
 @DeveloperApi
 case class BatchPythonEvaluation(udf: PythonUDF, output: Seq[Attribute], child: SparkPlan)
@@ -342,51 +348,57 @@ case class BatchPythonEvaluation(udf: PythonUDF, output: Seq[Attribute], child:
   override def canProcessSafeRows: Boolean = true
 
   protected override def doExecute(): RDD[InternalRow] = {
-    val childResults = child.execute().map(_.copy())
+    val inputRDD = child.execute().map(_.copy())
+    val bufferSize = inputRDD.conf.getInt("spark.buffer.size", 65536)
+    val reuseWorker = inputRDD.conf.getBoolean("spark.python.worker.reuse", defaultValue = true)
 
-    val parent = childResults.mapPartitions { iter =>
+    inputRDD.mapPartitions { iter =>
       EvaluatePython.registerPicklers()  // register pickler for Row
+
+      // The queue used to buffer input rows so we can drain it to
+      // combine input with output from Python.
+      val queue = new java.util.concurrent.ConcurrentLinkedQueue[InternalRow]()
+
       val pickle = new Pickler
       val currentRow = newMutableProjection(udf.children, child.output)()
       val fields = udf.children.map(_.dataType)
       val schema = new StructType(fields.map(t => new StructField("", t, true)).toArray)
-      iter.grouped(100).map { inputRows =>
+
+      // Input iterator to Python: input rows are grouped so we send them in batches to Python.
+      // For each row, add it to the queue.
+      val inputIterator = iter.grouped(100).map { inputRows =>
         val toBePickled = inputRows.map { row =>
+          queue.add(row)
           EvaluatePython.toJava(currentRow(row), schema)
         }.toArray
         pickle.dumps(toBePickled)
       }
-    }
 
-    val pyRDD = new PythonRDD(
-      parent,
-      udf.command,
-      udf.envVars,
-      udf.pythonIncludes,
-      false,
-      udf.pythonExec,
-      udf.pythonVer,
-      udf.broadcastVars,
-      udf.accumulator
-    ).mapPartitions { iter =>
-      val pickle = new Unpickler
-      iter.flatMap { pickedResult =>
-        val unpickledBatch = pickle.loads(pickedResult)
-        unpickledBatch.asInstanceOf[java.util.ArrayList[Any]].asScala
-      }
-    }.mapPartitions { iter =>
+      val context = TaskContext.get()
+
+      // Output iterator for results from Python.
+      val outputIterator = new PythonRunner(
+        udf.command,
+        udf.envVars,
+        udf.pythonIncludes,
+        udf.pythonExec,
+        udf.pythonVer,
+        udf.broadcastVars,
+        udf.accumulator,
+        bufferSize,
+        reuseWorker
+      ).compute(inputIterator, context.partitionId(), context)
+
+      val unpickle = new Unpickler
       val row = new GenericMutableRow(1)
-      iter.map { result =>
-        row(0) = EvaluatePython.fromJava(result, udf.dataType)
-        row: InternalRow
-      }
-    }
+      val joined = new JoinedRow
 
-    childResults.zip(pyRDD).mapPartitions { iter =>
-      val joinedRow = new JoinedRow()
-      iter.map {
-        case (row, udfResult) =>
-          joinedRow(row, udfResult)
+      outputIterator.flatMap { pickedResult =>
+        val unpickledBatch = unpickle.loads(pickedResult)
+        unpickledBatch.asInstanceOf[java.util.ArrayList[Any]].asScala
+      }.map { result =>
+        row(0) = EvaluatePython.fromJava(result, udf.dataType)
+        joined(queue.poll(), row)
       }
     }
   }

From 61d4c07f4becb42f054e588be56ed13239644410 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Tue, 22 Sep 2015 16:35:43 -0700
Subject: [PATCH 078/896] [SPARK-10640] History server fails to parse
 TaskCommitDenied

... simply because the code is missing!

Author: Andrew Or <andrew@databricks.com>

Closes #8828 from andrewor14/task-end-reason-json.
---
 .../scala/org/apache/spark/TaskEndReason.scala  |  6 +++++-
 .../org/apache/spark/util/JsonProtocol.scala    | 13 +++++++++++++
 .../apache/spark/util/JsonProtocolSuite.scala   | 17 +++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/TaskEndReason.scala b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
index 7137246bc34f..9335c5f4160b 100644
--- a/core/src/main/scala/org/apache/spark/TaskEndReason.scala
+++ b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
@@ -17,13 +17,17 @@
 
 package org.apache.spark
 
-import java.io.{IOException, ObjectInputStream, ObjectOutputStream}
+import java.io.{ObjectInputStream, ObjectOutputStream}
 
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.storage.BlockManagerId
 import org.apache.spark.util.Utils
 
+// ==============================================================================================
+// NOTE: new task end reasons MUST be accompanied with serialization logic in util.JsonProtocol!
+// ==============================================================================================
+
 /**
  * :: DeveloperApi ::
  * Various possible reasons why a task ended. The low-level TaskScheduler is supposed to retry
diff --git a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
index 99614a786bd9..40729fa5a4ff 100644
--- a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
@@ -362,6 +362,10 @@ private[spark] object JsonProtocol {
         ("Stack Trace" -> stackTrace) ~
         ("Full Stack Trace" -> exceptionFailure.fullStackTrace) ~
         ("Metrics" -> metrics)
+      case taskCommitDenied: TaskCommitDenied =>
+        ("Job ID" -> taskCommitDenied.jobID) ~
+        ("Partition ID" -> taskCommitDenied.partitionID) ~
+        ("Attempt Number" -> taskCommitDenied.attemptNumber)
       case ExecutorLostFailure(executorId, isNormalExit) =>
         ("Executor ID" -> executorId) ~
         ("Normal Exit" -> isNormalExit)
@@ -770,6 +774,7 @@ private[spark] object JsonProtocol {
     val exceptionFailure = Utils.getFormattedClassName(ExceptionFailure)
     val taskResultLost = Utils.getFormattedClassName(TaskResultLost)
     val taskKilled = Utils.getFormattedClassName(TaskKilled)
+    val taskCommitDenied = Utils.getFormattedClassName(TaskCommitDenied)
     val executorLostFailure = Utils.getFormattedClassName(ExecutorLostFailure)
     val unknownReason = Utils.getFormattedClassName(UnknownReason)
 
@@ -794,6 +799,14 @@ private[spark] object JsonProtocol {
         ExceptionFailure(className, description, stackTrace, fullStackTrace, metrics, None)
       case `taskResultLost` => TaskResultLost
       case `taskKilled` => TaskKilled
+      case `taskCommitDenied` =>
+        // Unfortunately, the `TaskCommitDenied` message was introduced in 1.3.0 but the JSON
+        // de/serialization logic was not added until 1.5.1. To provide backward compatibility
+        // for reading those logs, we need to provide default values for all the fields.
+        val jobId = Utils.jsonOption(json \ "Job ID").map(_.extract[Int]).getOrElse(-1)
+        val partitionId = Utils.jsonOption(json \ "Partition ID").map(_.extract[Int]).getOrElse(-1)
+        val attemptNo = Utils.jsonOption(json \ "Attempt Number").map(_.extract[Int]).getOrElse(-1)
+        TaskCommitDenied(jobId, partitionId, attemptNo)
       case `executorLostFailure` =>
         val isNormalExit = Utils.jsonOption(json \ "Normal Exit").
           map(_.extract[Boolean])
diff --git a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
index 143c1b901df1..a24bf2931cca 100644
--- a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
@@ -151,6 +151,7 @@ class JsonProtocolSuite extends SparkFunSuite {
     testTaskEndReason(exceptionFailure)
     testTaskEndReason(TaskResultLost)
     testTaskEndReason(TaskKilled)
+    testTaskEndReason(TaskCommitDenied(2, 3, 4))
     testTaskEndReason(ExecutorLostFailure("100", true))
     testTaskEndReason(UnknownReason)
 
@@ -352,6 +353,17 @@ class JsonProtocolSuite extends SparkFunSuite {
     assertEquals(expectedStageInfo, JsonProtocol.stageInfoFromJson(oldStageInfo))
   }
 
+  // `TaskCommitDenied` was added in 1.3.0 but JSON de/serialization logic was added in 1.5.1
+  test("TaskCommitDenied backward compatibility") {
+    val denied = TaskCommitDenied(1, 2, 3)
+    val oldDenied = JsonProtocol.taskEndReasonToJson(denied)
+      .removeField({ _._1 == "Job ID" })
+      .removeField({ _._1 == "Partition ID" })
+      .removeField({ _._1 == "Attempt Number" })
+    val expectedDenied = TaskCommitDenied(-1, -1, -1)
+    assertEquals(expectedDenied, JsonProtocol.taskEndReasonFromJson(oldDenied))
+  }
+
   /** -------------------------- *
    | Helper test running methods |
    * --------------------------- */
@@ -577,6 +589,11 @@ class JsonProtocolSuite extends SparkFunSuite {
         assertOptionEquals(r1.metrics, r2.metrics, assertTaskMetricsEquals)
       case (TaskResultLost, TaskResultLost) =>
       case (TaskKilled, TaskKilled) =>
+      case (TaskCommitDenied(jobId1, partitionId1, attemptNumber1),
+          TaskCommitDenied(jobId2, partitionId2, attemptNumber2)) =>
+        assert(jobId1 === jobId2)
+        assert(partitionId1 === partitionId2)
+        assert(attemptNumber1 === attemptNumber2)
       case (ExecutorLostFailure(execId1, isNormalExit1),
           ExecutorLostFailure(execId2, isNormalExit2)) =>
         assert(execId1 === execId2)

From 84f81e035e1dab1b42c36563041df6ba16e7b287 Mon Sep 17 00:00:00 2001
From: Zhichao Li <zhichao.li@intel.com>
Date: Tue, 22 Sep 2015 19:41:57 -0700
Subject: [PATCH 079/896] [SPARK-10310] [SQL] Fixes script transformation
 field/line delimiters

**Please attribute this PR to `Zhichao Li <zhichao.liintel.com>`.**

This PR is based on PR #8476 authored by zhichao-li. It fixes SPARK-10310 by adding field delimiter SerDe property to the default `LazySimpleSerDe`, and enabling default record reader/writer classes.

Currently, we only support `LazySimpleSerDe`, used together with `TextRecordReader` and `TextRecordWriter`, and don't support customizing record reader/writer using `RECORDREADER`/`RECORDWRITER` clauses. This should be addressed in separate PR(s).

Author: Cheng Lian <lian@databricks.com>

Closes #8860 from liancheng/spark-10310/fix-script-trans-delimiters.
---
 .../org/apache/spark/sql/hive/HiveQl.scala    | 52 ++++++++++---
 .../hive/execution/ScriptTransformation.scala | 75 +++++++++++++++----
 .../resources/data/scripts/test_transform.py  |  6 ++
 .../sql/hive/execution/SQLQuerySuite.scala    | 39 ++++++++++
 .../execution/ScriptTransformationSuite.scala |  2 +
 5 files changed, 152 insertions(+), 22 deletions(-)
 create mode 100755 sql/hive/src/test/resources/data/scripts/test_transform.py

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index d5cd7e98b526..256440a9a2e9 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -32,6 +32,7 @@ import org.apache.hadoop.hive.ql.lib.Node
 import org.apache.hadoop.hive.ql.parse._
 import org.apache.hadoop.hive.ql.plan.PlanUtils
 import org.apache.hadoop.hive.ql.session.SessionState
+import org.apache.hadoop.hive.serde2.`lazy`.LazySimpleSerDe
 
 import org.apache.spark.Logging
 import org.apache.spark.sql.AnalysisException
@@ -884,16 +885,22 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
                   AttributeReference("value", StringType)()), true)
             }
 
-            def matchSerDe(clause: Seq[ASTNode])
-              : (Seq[(String, String)], Option[String], Seq[(String, String)]) = clause match {
+            type SerDeInfo = (
+              Seq[(String, String)],  // Input row format information
+              Option[String],         // Optional input SerDe class
+              Seq[(String, String)],  // Input SerDe properties
+              Boolean                 // Whether to use default record reader/writer
+            )
+
+            def matchSerDe(clause: Seq[ASTNode]): SerDeInfo = clause match {
               case Token("TOK_SERDEPROPS", propsClause) :: Nil =>
                 val rowFormat = propsClause.map {
                   case Token(name, Token(value, Nil) :: Nil) => (name, value)
                 }
-                (rowFormat, None, Nil)
+                (rowFormat, None, Nil, false)
 
               case Token("TOK_SERDENAME", Token(serdeClass, Nil) :: Nil) :: Nil =>
-                (Nil, Some(BaseSemanticAnalyzer.unescapeSQLString(serdeClass)), Nil)
+                (Nil, Some(BaseSemanticAnalyzer.unescapeSQLString(serdeClass)), Nil, false)
 
               case Token("TOK_SERDENAME", Token(serdeClass, Nil) ::
                 Token("TOK_TABLEPROPERTIES",
@@ -903,20 +910,47 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
                     (BaseSemanticAnalyzer.unescapeSQLString(name),
                       BaseSemanticAnalyzer.unescapeSQLString(value))
                 }
-                (Nil, Some(BaseSemanticAnalyzer.unescapeSQLString(serdeClass)), serdeProps)
 
-              case Nil => (Nil, Option(hiveConf.getVar(ConfVars.HIVESCRIPTSERDE)), Nil)
+                // SPARK-10310: Special cases LazySimpleSerDe
+                // TODO Fully supports user-defined record reader/writer classes
+                val unescapedSerDeClass = BaseSemanticAnalyzer.unescapeSQLString(serdeClass)
+                val useDefaultRecordReaderWriter =
+                  unescapedSerDeClass == classOf[LazySimpleSerDe].getCanonicalName
+                (Nil, Some(unescapedSerDeClass), serdeProps, useDefaultRecordReaderWriter)
+
+              case Nil =>
+                // Uses default TextRecordReader/TextRecordWriter, sets field delimiter here
+                val serdeProps = Seq(serdeConstants.FIELD_DELIM -> "\t")
+                (Nil, Option(hiveConf.getVar(ConfVars.HIVESCRIPTSERDE)), serdeProps, true)
             }
 
-            val (inRowFormat, inSerdeClass, inSerdeProps) = matchSerDe(inputSerdeClause)
-            val (outRowFormat, outSerdeClass, outSerdeProps) = matchSerDe(outputSerdeClause)
+            val (inRowFormat, inSerdeClass, inSerdeProps, useDefaultRecordReader) =
+              matchSerDe(inputSerdeClause)
+
+            val (outRowFormat, outSerdeClass, outSerdeProps, useDefaultRecordWriter) =
+              matchSerDe(outputSerdeClause)
 
             val unescapedScript = BaseSemanticAnalyzer.unescapeSQLString(script)
 
+            // TODO Adds support for user-defined record reader/writer classes
+            val recordReaderClass = if (useDefaultRecordReader) {
+              Option(hiveConf.getVar(ConfVars.HIVESCRIPTRECORDREADER))
+            } else {
+              None
+            }
+
+            val recordWriterClass = if (useDefaultRecordWriter) {
+              Option(hiveConf.getVar(ConfVars.HIVESCRIPTRECORDWRITER))
+            } else {
+              None
+            }
+
             val schema = HiveScriptIOSchema(
               inRowFormat, outRowFormat,
               inSerdeClass, outSerdeClass,
-              inSerdeProps, outSerdeProps, schemaLess)
+              inSerdeProps, outSerdeProps,
+              recordReaderClass, recordWriterClass,
+              schemaLess)
 
             Some(
               logical.ScriptTransformation(
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/ScriptTransformation.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/ScriptTransformation.scala
index 32bddbaeaeaf..b30117f0de99 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/ScriptTransformation.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/ScriptTransformation.scala
@@ -24,20 +24,22 @@ import javax.annotation.Nullable
 import scala.collection.JavaConverters._
 import scala.util.control.NonFatal
 
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.hive.ql.exec.{RecordReader, RecordWriter}
 import org.apache.hadoop.hive.serde.serdeConstants
 import org.apache.hadoop.hive.serde2.AbstractSerDe
 import org.apache.hadoop.hive.serde2.objectinspector._
 import org.apache.hadoop.io.Writable
 
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.ScriptInputOutputSchema
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.execution._
 import org.apache.spark.sql.hive.HiveShim._
 import org.apache.spark.sql.hive.{HiveContext, HiveInspectors}
 import org.apache.spark.sql.types.DataType
-import org.apache.spark.util.{CircularBuffer, RedirectThread, Utils}
+import org.apache.spark.util.{CircularBuffer, RedirectThread, SerializableConfiguration, Utils}
 import org.apache.spark.{Logging, TaskContext}
 
 /**
@@ -58,6 +60,8 @@ case class ScriptTransformation(
 
   override def otherCopyArgs: Seq[HiveContext] = sc :: Nil
 
+  private val serializedHiveConf = new SerializableConfiguration(sc.hiveconf)
+
   protected override def doExecute(): RDD[InternalRow] = {
     def processIterator(inputIterator: Iterator[InternalRow]): Iterator[InternalRow] = {
       val cmd = List("/bin/bash", "-c", script)
@@ -67,6 +71,7 @@ case class ScriptTransformation(
       val inputStream = proc.getInputStream
       val outputStream = proc.getOutputStream
       val errorStream = proc.getErrorStream
+      val localHiveConf = serializedHiveConf.value
 
       // In order to avoid deadlocks, we need to consume the error output of the child process.
       // To avoid issues caused by large error output, we use a circular buffer to limit the amount
@@ -96,7 +101,8 @@ case class ScriptTransformation(
         outputStream,
         proc,
         stderrBuffer,
-        TaskContext.get()
+        TaskContext.get(),
+        localHiveConf
       )
 
       // This nullability is a performance optimization in order to avoid an Option.foreach() call
@@ -109,6 +115,10 @@ case class ScriptTransformation(
       val outputIterator: Iterator[InternalRow] = new Iterator[InternalRow] with HiveInspectors {
         var curLine: String = null
         val scriptOutputStream = new DataInputStream(inputStream)
+
+        @Nullable val scriptOutputReader =
+          ioschema.recordReader(scriptOutputStream, localHiveConf).orNull
+
         var scriptOutputWritable: Writable = null
         val reusedWritableObject: Writable = if (null != outputSerde) {
           outputSerde.getSerializedClass().newInstance
@@ -134,15 +144,25 @@ case class ScriptTransformation(
             }
           } else if (scriptOutputWritable == null) {
             scriptOutputWritable = reusedWritableObject
-            try {
-              scriptOutputWritable.readFields(scriptOutputStream)
-              true
-            } catch {
-              case _: EOFException =>
-                if (writerThread.exception.isDefined) {
-                  throw writerThread.exception.get
-                }
+
+            if (scriptOutputReader != null) {
+              if (scriptOutputReader.next(scriptOutputWritable) <= 0) {
+                writerThread.exception.foreach(throw _)
                 false
+              } else {
+                true
+              }
+            } else {
+              try {
+                scriptOutputWritable.readFields(scriptOutputStream)
+                true
+              } catch {
+                case _: EOFException =>
+                  if (writerThread.exception.isDefined) {
+                    throw writerThread.exception.get
+                  }
+                  false
+              }
             }
           } else {
             true
@@ -210,7 +230,8 @@ private class ScriptTransformationWriterThread(
     outputStream: OutputStream,
     proc: Process,
     stderrBuffer: CircularBuffer,
-    taskContext: TaskContext
+    taskContext: TaskContext,
+    conf: Configuration
   ) extends Thread("Thread-ScriptTransformation-Feed") with Logging {
 
   setDaemon(true)
@@ -224,6 +245,7 @@ private class ScriptTransformationWriterThread(
     TaskContext.setTaskContext(taskContext)
 
     val dataOutputStream = new DataOutputStream(outputStream)
+    @Nullable val scriptInputWriter = ioschema.recordWriter(dataOutputStream, conf).orNull
 
     // We can't use Utils.tryWithSafeFinally here because we also need a `catch` block, so
     // let's use a variable to record whether the `finally` block was hit due to an exception
@@ -250,7 +272,12 @@ private class ScriptTransformationWriterThread(
         } else {
           val writable = inputSerde.serialize(
             row.asInstanceOf[GenericInternalRow].values, inputSoi)
-          prepareWritable(writable, ioschema.outputSerdeProps).write(dataOutputStream)
+
+          if (scriptInputWriter != null) {
+            scriptInputWriter.write(writable)
+          } else {
+            prepareWritable(writable, ioschema.outputSerdeProps).write(dataOutputStream)
+          }
         }
       }
       outputStream.close()
@@ -290,6 +317,8 @@ case class HiveScriptIOSchema (
     outputSerdeClass: Option[String],
     inputSerdeProps: Seq[(String, String)],
     outputSerdeProps: Seq[(String, String)],
+    recordReaderClass: Option[String],
+    recordWriterClass: Option[String],
     schemaLess: Boolean) extends ScriptInputOutputSchema with HiveInspectors {
 
   private val defaultFormat = Map(
@@ -347,4 +376,24 @@ case class HiveScriptIOSchema (
 
     serde
   }
+
+  def recordReader(
+      inputStream: InputStream,
+      conf: Configuration): Option[RecordReader] = {
+    recordReaderClass.map { klass =>
+      val instance = Utils.classForName(klass).newInstance().asInstanceOf[RecordReader]
+      val props = new Properties()
+      props.putAll(outputSerdeProps.toMap.asJava)
+      instance.initialize(inputStream, conf, props)
+      instance
+    }
+  }
+
+  def recordWriter(outputStream: OutputStream, conf: Configuration): Option[RecordWriter] = {
+    recordWriterClass.map { klass =>
+      val instance = Utils.classForName(klass).newInstance().asInstanceOf[RecordWriter]
+      instance.initialize(outputStream, conf)
+      instance
+    }
+  }
 }
diff --git a/sql/hive/src/test/resources/data/scripts/test_transform.py b/sql/hive/src/test/resources/data/scripts/test_transform.py
new file mode 100755
index 000000000000..ac6d11d8b919
--- /dev/null
+++ b/sql/hive/src/test/resources/data/scripts/test_transform.py
@@ -0,0 +1,6 @@
+import sys
+
+delim = sys.argv[1]
+
+for row in sys.stdin:
+    print(delim.join([w + '#' for w in row[:-1].split(delim)]))
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index bb02473dd17c..71823e32ad38 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1184,4 +1184,43 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
     checkAnswer(df, Row("text inside layer 2") :: Nil)
   }
+
+  test("SPARK-10310: " +
+    "script transformation using default input/output SerDe and record reader/writer") {
+    sqlContext
+      .range(5)
+      .selectExpr("id AS a", "id AS b")
+      .registerTempTable("test")
+
+    checkAnswer(
+      sql(
+        """FROM(
+          |  FROM test SELECT TRANSFORM(a, b)
+          |  USING 'python src/test/resources/data/scripts/test_transform.py "\t"'
+          |  AS (c STRING, d STRING)
+          |) t
+          |SELECT c
+        """.stripMargin),
+      (0 until 5).map(i => Row(i + "#")))
+  }
+
+  test("SPARK-10310: script transformation using LazySimpleSerDe") {
+    sqlContext
+      .range(5)
+      .selectExpr("id AS a", "id AS b")
+      .registerTempTable("test")
+
+    val df = sql(
+      """FROM test
+        |SELECT TRANSFORM(a, b)
+        |ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
+        |WITH SERDEPROPERTIES('field.delim' = '|')
+        |USING 'python src/test/resources/data/scripts/test_transform.py "|"'
+        |AS (c STRING, d STRING)
+        |ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
+        |WITH SERDEPROPERTIES('field.delim' = '|')
+      """.stripMargin)
+
+    checkAnswer(df, (0 until 5).map(i => Row(i + "#", i + "#")))
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/ScriptTransformationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/ScriptTransformationSuite.scala
index cb8d0fca8e69..7cfdb886b585 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/ScriptTransformationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/ScriptTransformationSuite.scala
@@ -38,6 +38,8 @@ class ScriptTransformationSuite extends SparkPlanTest with TestHiveSingleton {
     outputSerdeClass = None,
     inputSerdeProps = Seq.empty,
     outputSerdeProps = Seq.empty,
+    recordReaderClass = None,
+    recordWriterClass = None,
     schemaLess = false
   )
 

From 558e9c7e60a7c0d85ba26634e97562ad2163e91d Mon Sep 17 00:00:00 2001
From: Matt Hagen <anonz3000@gmail.com>
Date: Tue, 22 Sep 2015 21:14:25 -0700
Subject: [PATCH 080/896] [SPARK-10663] Removed unnecessary invocation of
 DataFrame.toDF method.

The Scala example under the "Example: Pipeline" heading in this
document initializes the "test" variable to a DataFrame. Because test
is already a DF, there is not need to call test.toDF as the example
does in a subsequent line: model.transform(test.toDF). So, I removed
the extraneous toDF invocation.

Author: Matt Hagen <anonz3000@gmail.com>

Closes #8875 from hagenhaus/SPARK-10663.
---
 docs/ml-guide.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index 0427ac6695aa..fd3a6167bc65 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -475,7 +475,7 @@ val test = sqlContext.createDataFrame(Seq(
 )).toDF("id", "text")
 
 // Make predictions on test documents.
-model.transform(test.toDF)
+model.transform(test)
   .select("id", "text", "probability", "prediction")
   .collect()
   .foreach { case Row(id: Long, text: String, prob: Vector, prediction: Double) =>

From 5548a254755bb84edae2768b94ab1816e1b49b91 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Tue, 22 Sep 2015 22:44:09 -0700
Subject: [PATCH 081/896] [SPARK-10652] [SPARK-10742] [STREAMING] Set
 meaningful job descriptions for all streaming jobs

Here is the screenshot after adding the job descriptions to threads that run receivers and the scheduler thread running the batch jobs.

## All jobs page
* Added job descriptions with links to relevant batch details page
![image](https://cloud.githubusercontent.com/assets/663212/9924165/cda4a372-5cb1-11e5-91ca-d43a32c699e9.png)

## All stages page
* Added stage descriptions with links to relevant batch details page
![image](https://cloud.githubusercontent.com/assets/663212/9923814/2cce266a-5cae-11e5-8a3f-dad84d06c50e.png)

## Streaming batch details page
* Added the +details link
![image](https://cloud.githubusercontent.com/assets/663212/9921977/24014a32-5c98-11e5-958e-457b6c38065b.png)

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #8791 from tdas/SPARK-10652.
---
 .../scala/org/apache/spark/ui/UIUtils.scala   | 62 ++++++++++++++++-
 .../apache/spark/ui/jobs/AllJobsPage.scala    | 14 ++--
 .../org/apache/spark/ui/jobs/StageTable.scala |  7 +-
 .../org/apache/spark/ui/UIUtilsSuite.scala    | 66 +++++++++++++++++++
 .../spark/streaming/StreamingContext.scala    |  4 +-
 .../streaming/scheduler/JobScheduler.scala    | 15 ++++-
 .../streaming/scheduler/ReceiverTracker.scala |  5 +-
 .../apache/spark/streaming/ui/BatchPage.scala | 33 ++++++----
 .../streaming/StreamingContextSuite.scala     |  2 +-
 9 files changed, 179 insertions(+), 29 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
index f2da41772410..21dc8f0b6548 100644
--- a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
+++ b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
@@ -18,9 +18,11 @@
 package org.apache.spark.ui
 
 import java.text.SimpleDateFormat
-import java.util.{Locale, Date}
+import java.util.{Date, Locale}
 
-import scala.xml.{Node, Text, Unparsed}
+import scala.util.control.NonFatal
+import scala.xml._
+import scala.xml.transform.{RewriteRule, RuleTransformer}
 
 import org.apache.spark.Logging
 import org.apache.spark.ui.scope.RDDOperationGraph
@@ -395,4 +397,60 @@ private[spark] object UIUtils extends Logging {
     </script>
   }
 
+  /**
+   * Returns HTML rendering of a job or stage description. It will try to parse the string as HTML
+   * and make sure that it only contains anchors with root-relative links. Otherwise,
+   * the whole string will rendered as a simple escaped text.
+   *
+   * Note: In terms of security, only anchor tags with root relative links are supported. So any
+   * attempts to embed links outside Spark UI, or other tags like <script> will cause in the whole
+   * description to be treated as plain text.
+   */
+  def makeDescription(desc: String, basePathUri: String): NodeSeq = {
+    import scala.language.postfixOps
+
+    // If the description can be parsed as HTML and has only relative links, then render
+    // as HTML, otherwise render as escaped string
+    try {
+      // Try to load the description as unescaped HTML
+      val xml = XML.loadString(s"""<span class="description-input">$desc</span>""")
+
+      // Verify that this has only anchors and span (we are wrapping in span)
+      val allowedNodeLabels = Set("a", "span")
+      val illegalNodes = xml \\ "_"  filterNot { case node: Node =>
+        allowedNodeLabels.contains(node.label)
+      }
+      if (illegalNodes.nonEmpty) {
+        throw new IllegalArgumentException(
+          "Only HTML anchors allowed in job descriptions\n" +
+            illegalNodes.map { n => s"${n.label} in $n"}.mkString("\n\t"))
+      }
+
+      // Verify that all links are relative links starting with "/"
+      val allLinks =
+        xml \\ "a" flatMap { _.attributes } filter { _.key == "href" } map { _.value.toString }
+      if (allLinks.exists { ! _.startsWith ("/") }) {
+        throw new IllegalArgumentException(
+          "Links in job descriptions must be root-relative:\n" + allLinks.mkString("\n\t"))
+      }
+
+      // Prepend the relative links with basePathUri
+      val rule = new RewriteRule() {
+        override def transform(n: Node): Seq[Node] = {
+          n match {
+            case e: Elem if e \ "@href" nonEmpty =>
+              val relativePath = e.attribute("href").get.toString
+              val fullUri = s"${basePathUri.stripSuffix("/")}/${relativePath.stripPrefix("/")}"
+              e % Attribute(null, "href", fullUri, Null)
+            case _ => n
+          }
+        }
+      }
+      new RuleTransformer(rule).transform(xml)
+    } catch {
+      case NonFatal(e) =>
+        logWarning(s"Invalid job description: $desc ", e)
+        <span class="description-input">{desc}</span>
+    }
+  }
 }
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala b/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
index e72547df7254..041cd55ea483 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
@@ -17,15 +17,15 @@
 
 package org.apache.spark.ui.jobs
 
-import scala.collection.mutable.{HashMap, ListBuffer}
-import scala.xml.{Node, NodeSeq, Unparsed, Utility}
-
 import java.util.Date
 import javax.servlet.http.HttpServletRequest
 
-import org.apache.spark.ui.{ToolTips, UIUtils, WebUIPage}
-import org.apache.spark.ui.jobs.UIData.{ExecutorUIData, JobUIData}
+import scala.collection.mutable.{HashMap, ListBuffer}
+import scala.xml._
+
 import org.apache.spark.JobExecutionStatus
+import org.apache.spark.ui.jobs.UIData.{ExecutorUIData, JobUIData}
+import org.apache.spark.ui.{ToolTips, UIUtils, WebUIPage}
 
 /** Page showing list of all ongoing and recently finished jobs */
 private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") {
@@ -224,6 +224,8 @@ private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") {
       }
       val formattedDuration = duration.map(d => UIUtils.formatDuration(d)).getOrElse("Unknown")
       val formattedSubmissionTime = job.submissionTime.map(UIUtils.formatDate).getOrElse("Unknown")
+      val jobDescription = UIUtils.makeDescription(lastStageDescription, parent.basePath)
+
       val detailUrl =
         "%s/jobs/job?id=%s".format(UIUtils.prependBaseUri(parent.basePath), job.jobId)
       <tr id={"job-" + job.jobId}>
@@ -231,7 +233,7 @@ private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") {
           {job.jobId} {job.jobGroup.map(id => s"($id)").getOrElse("")}
         </td>
         <td>
-          <span class="description-input" title={lastStageDescription}>{lastStageDescription}</span>
+          {jobDescription}
           <a href={detailUrl} class="name-link">{lastStageName}</a>
         </td>
         <td sorttable_customkey={job.submissionTime.getOrElse(-1).toString}>
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
index 99812db4912a..ea806d09b600 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
@@ -17,11 +17,10 @@
 
 package org.apache.spark.ui.jobs
 
-import scala.xml.Node
-import scala.xml.Text
-
 import java.util.Date
 
+import scala.xml.{Node, Text}
+
 import org.apache.commons.lang3.StringEscapeUtils
 
 import org.apache.spark.scheduler.StageInfo
@@ -116,7 +115,7 @@ private[ui] class StageTableBase(
       stageData <- listener.stageIdToData.get((s.stageId, s.attemptId))
       desc <- stageData.description
     } yield {
-      <span class="description-input" title={desc}>{desc}</span>
+      UIUtils.makeDescription(desc, basePathUri)
     }
     <div>{stageDesc.getOrElse("")} {killLink} {nameLink} {details}</div>
   }
diff --git a/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala b/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala
new file mode 100644
index 000000000000..2b693c165180
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ui
+
+import scala.xml.Elem
+
+import org.apache.spark.SparkFunSuite
+
+class UIUtilsSuite extends SparkFunSuite {
+  import UIUtils._
+
+  test("makeDescription") {
+    verify(
+      """test <a href="/link"> text </a>""",
+      <span class="description-input">test <a href="/link"> text </a></span>,
+      "Correctly formatted text with only anchors and relative links should generate HTML"
+    )
+
+    verify(
+      """test <a href="/link" text </a>""",
+      <span class="description-input">{"""test <a href="/link" text </a>"""}</span>,
+      "Badly formatted text should make the description be treated as a streaming instead of HTML"
+    )
+
+    verify(
+      """test <a href="link"> text </a>""",
+      <span class="description-input">{"""test <a href="link"> text </a>"""}</span>,
+      "Non-relative links should make the description be treated as a string instead of HTML"
+    )
+
+    verify(
+      """test<a><img></img></a>""",
+      <span class="description-input">{"""test<a><img></img></a>"""}</span>,
+      "Non-anchor elements should make the description be treated as a string instead of HTML"
+    )
+
+    verify(
+      """test <a href="/link"> text </a>""",
+      <span class="description-input">test <a href="base/link"> text </a></span>,
+      baseUrl = "base",
+      errorMsg = "Base URL should be prepended to html links"
+    )
+  }
+
+  private def verify(
+      desc: String, expected: Elem, errorMsg: String = "", baseUrl: String = ""): Unit = {
+    val generated = makeDescription(desc, baseUrl)
+    assert(generated.sameElements(expected),
+      s"\n$errorMsg\n\nExpected:\n$expected\nGenerated:\n$generated")
+  }
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index 6720ba4f72cf..94fea63f55b2 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -200,6 +200,8 @@ class StreamingContext private[streaming] (
 
   private val startSite = new AtomicReference[CallSite](null)
 
+  private[streaming] def getStartSite(): CallSite = startSite.get()
+
   private var shutdownHookRef: AnyRef = _
 
   conf.getOption("spark.streaming.checkpoint.directory").foreach(checkpoint)
@@ -744,7 +746,7 @@ object StreamingContext extends Logging {
         throw new IllegalStateException(
           "Only one StreamingContext may be started in this JVM. " +
             "Currently running StreamingContext was started at" +
-            activeContext.get.startSite.get.longForm)
+            activeContext.get.getStartSite().longForm)
       }
     }
   }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
index 0cd39594ee92..32d995dc42f2 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
@@ -25,6 +25,7 @@ import scala.util.{Failure, Success}
 import org.apache.spark.Logging
 import org.apache.spark.rdd.PairRDDFunctions
 import org.apache.spark.streaming._
+import org.apache.spark.streaming.ui.UIUtils
 import org.apache.spark.util.{EventLoop, ThreadUtils}
 
 
@@ -190,10 +191,20 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
   }
 
   private class JobHandler(job: Job) extends Runnable with Logging {
+    import JobScheduler._
+
     def run() {
-      ssc.sc.setLocalProperty(JobScheduler.BATCH_TIME_PROPERTY_KEY, job.time.milliseconds.toString)
-      ssc.sc.setLocalProperty(JobScheduler.OUTPUT_OP_ID_PROPERTY_KEY, job.outputOpId.toString)
       try {
+        val formattedTime = UIUtils.formatBatchTime(
+          job.time.milliseconds, ssc.graph.batchDuration.milliseconds, showYYYYMMSS = false)
+        val batchUrl = s"/streaming/batch/?id=${job.time.milliseconds}"
+        val batchLinkText = s"[output operation ${job.outputOpId}, batch time ${formattedTime}]"
+
+        ssc.sc.setJobDescription(
+          s"""Streaming job from <a href="$batchUrl">$batchLinkText</a>""")
+        ssc.sc.setLocalProperty(BATCH_TIME_PROPERTY_KEY, job.time.milliseconds.toString)
+        ssc.sc.setLocalProperty(OUTPUT_OP_ID_PROPERTY_KEY, job.outputOpId.toString)
+
         // We need to assign `eventLoop` to a temp variable. Otherwise, because
         // `JobScheduler.stop(false)` may set `eventLoop` to null when this method is running, then
         // it's possible that when `post` is called, `eventLoop` happens to null.
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index f86fd44b4871..204e6142fd6c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -30,7 +30,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.rpc._
 import org.apache.spark.streaming.{StreamingContext, Time}
 import org.apache.spark.streaming.receiver._
-import org.apache.spark.util.{ThreadUtils, SerializableConfiguration}
+import org.apache.spark.util.{Utils, ThreadUtils, SerializableConfiguration}
 
 
 /** Enumeration to identify current state of a Receiver */
@@ -554,6 +554,9 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
           ssc.sc.makeRDD(Seq(receiver -> scheduledExecutors))
         }
       receiverRDD.setName(s"Receiver $receiverId")
+      ssc.sparkContext.setJobDescription(s"Streaming job running receiver $receiverId")
+      ssc.sparkContext.setCallSite(Option(ssc.getStartSite()).getOrElse(Utils.getCallSite()))
+
       val future = ssc.sparkContext.submitJob[Receiver[_], Unit, Unit](
         receiverRDD, startReceiverFunc, Seq(0), (_, _) => Unit, ())
       // We will keep restarting the receiver job until ReceiverTracker is stopped
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
index 90d1b0fadecf..9129c1f26abd 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
@@ -19,14 +19,14 @@ package org.apache.spark.streaming.ui
 
 import javax.servlet.http.HttpServletRequest
 
-import scala.xml.{NodeSeq, Node, Text, Unparsed}
+import scala.xml._
 
 import org.apache.commons.lang3.StringEscapeUtils
 
 import org.apache.spark.streaming.Time
-import org.apache.spark.ui.{UIUtils => SparkUIUtils, WebUIPage}
-import org.apache.spark.streaming.ui.StreamingJobProgressListener.{SparkJobId, OutputOpId}
+import org.apache.spark.streaming.ui.StreamingJobProgressListener.{OutputOpId, SparkJobId}
 import org.apache.spark.ui.jobs.UIData.JobUIData
+import org.apache.spark.ui.{UIUtils => SparkUIUtils, WebUIPage}
 
 private[ui] case class SparkJobIdWithUIData(sparkJobId: SparkJobId, jobUIData: Option[JobUIData])
 
@@ -207,16 +207,25 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
             sparkListener.stageIdToInfo.get(sparkJob.stageIds.max)
           }
         }
-    val lastStageData = lastStageInfo.flatMap { s =>
-      sparkListener.stageIdToData.get((s.stageId, s.attemptId))
-    }
-
-    val lastStageName = lastStageInfo.map(_.name).getOrElse("(Unknown Stage Name)")
-    val lastStageDescription = lastStageData.flatMap(_.description).getOrElse("")
+    lastStageInfo match {
+      case Some(stageInfo) =>
+        val details = if (stageInfo.details.nonEmpty) {
+          <span
+            onclick="this.parentNode.querySelector('.stage-details').classList.toggle('collapsed')"
+            class="expand-details">
+              +details
+          </span> ++
+          <div class="stage-details collapsed">
+            <pre>{stageInfo.details}</pre>
+          </div>
+        } else {
+          NodeSeq.Empty
+        }
 
-    <span class="description-input" title={lastStageDescription}>
-      {lastStageDescription}
-    </span> ++ Text(lastStageName)
+        <div> {stageInfo.name} {details} </div>
+      case None =>
+        Text("(Unknown)")
+    }
   }
 
   private def failureReasonCell(failureReason: String): Seq[Node] = {
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
index 3b9d0d15ea04..c7a877142b37 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
@@ -204,7 +204,7 @@ class StreamingContextSuite extends SparkFunSuite with BeforeAndAfter with Timeo
 
     // Verify streaming jobs have expected thread-local properties
     assert(jobGroupFound === null)
-    assert(jobDescFound === null)
+    assert(jobDescFound.contains("Streaming job from"))
     assert(jobInterruptFound === "false")
 
     // Verify current thread's thread-local properties have not changed

From 44c28abf120754c0175c65ffd3d4587a350b3798 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Wed, 23 Sep 2015 01:28:02 -0700
Subject: [PATCH 082/896] [SPARK-10224] [STREAMING] Fix the issue that
 blockIntervalTimer won't call updateCurrentBuffer when stopping

`blockIntervalTimer.stop(interruptTimer = false)` doesn't guarantee calling `updateCurrentBuffer`. So it's possible that `blockIntervalTimer` will exit when `updateCurrentBuffer` is not empty. Then the data in `currentBuffer` will be lost.

To reproduce it, you can add `Thread.sleep(200)` in this line (https://github.com/apache/spark/blob/69c9c177160e32a2fbc9b36ecc52156077fca6fc/streaming/src/main/scala/org/apache/spark/streaming/util/RecurringTimer.scala#L100) and run `StreamingContexSuite`.
I cannot write a unit test to reproduce it because I cannot find an approach to force `RecurringTimer` suspend at this line for a few milliseconds.

There was a failure in Jenkins here: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/41455/console

This PR updates RecurringTimer to make sure `stop(interruptTimer = false)` will call `callback` at least once after the `stop` method is called.

Author: zsxwing <zsxwing@gmail.com>

Closes #8417 from zsxwing/SPARK-10224.
---
 .../spark/streaming/util/RecurringTimer.scala | 19 +++--
 .../receiver/BlockGeneratorSuite.scala        |  7 +-
 .../streaming/util/RecurringTimerSuite.scala  | 83 +++++++++++++++++++
 3 files changed, 100 insertions(+), 9 deletions(-)
 create mode 100644 streaming/src/test/scala/org/apache/spark/streaming/util/RecurringTimerSuite.scala

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/RecurringTimer.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/RecurringTimer.scala
index dd32ad5ad811..0148cb51c6f0 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/RecurringTimer.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/RecurringTimer.scala
@@ -72,8 +72,10 @@ class RecurringTimer(clock: Clock, period: Long, callback: (Long) => Unit, name:
 
   /**
    * Stop the timer, and return the last time the callback was made.
-   * interruptTimer = true will interrupt the callback
+   * - interruptTimer = true will interrupt the callback
    * if it is in progress (not guaranteed to give correct time in this case).
+   * - interruptTimer = false guarantees that there will be at least one callback after `stop` has
+   * been called.
    */
   def stop(interruptTimer: Boolean): Long = synchronized {
     if (!stopped) {
@@ -87,18 +89,23 @@ class RecurringTimer(clock: Clock, period: Long, callback: (Long) => Unit, name:
     prevTime
   }
 
+  private def triggerActionForNextInterval(): Unit = {
+    clock.waitTillTime(nextTime)
+    callback(nextTime)
+    prevTime = nextTime
+    nextTime += period
+    logDebug("Callback for " + name + " called at time " + prevTime)
+  }
+
   /**
    * Repeatedly call the callback every interval.
    */
   private def loop() {
     try {
       while (!stopped) {
-        clock.waitTillTime(nextTime)
-        callback(nextTime)
-        prevTime = nextTime
-        nextTime += period
-        logDebug("Callback for " + name + " called at time " + prevTime)
+        triggerActionForNextInterval()
       }
+      triggerActionForNextInterval()
     } catch {
       case e: InterruptedException =>
     }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
index a38cc603f219..2f11b255f110 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
@@ -184,9 +184,10 @@ class BlockGeneratorSuite extends SparkFunSuite with BeforeAndAfter {
     // Verify that the final data is present in the final generated block and
     // pushed before complete stop
     assert(blockGenerator.isStopped() === false) // generator has not stopped yet
-    clock.advance(blockIntervalMs)   // force block generation
-    failAfter(1 second) {
-      thread.join()
+    eventually(timeout(10 seconds), interval(10 milliseconds)) {
+      // Keep calling `advance` to avoid blocking forever in `clock.waitTillTime`
+      clock.advance(blockIntervalMs)
+      assert(thread.isAlive === false)
     }
     assert(blockGenerator.isStopped() === true) // generator has finally been completely stopped
     assert(listener.pushedData === data, "All data not pushed by stop()")
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/RecurringTimerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/RecurringTimerSuite.scala
new file mode 100644
index 000000000000..0544972d95c0
--- /dev/null
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/RecurringTimerSuite.scala
@@ -0,0 +1,83 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.util
+
+import scala.collection.mutable
+import scala.concurrent.duration._
+
+import org.scalatest.PrivateMethodTester
+import org.scalatest.concurrent.Eventually._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.util.ManualClock
+
+class RecurringTimerSuite extends SparkFunSuite with PrivateMethodTester {
+
+  test("basic") {
+    val clock = new ManualClock()
+    val results = new mutable.ArrayBuffer[Long]() with mutable.SynchronizedBuffer[Long]
+    val timer = new RecurringTimer(clock, 100, time => {
+      results += time
+    }, "RecurringTimerSuite-basic")
+    timer.start(0)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      assert(results === Seq(0L))
+    }
+    clock.advance(100)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      assert(results === Seq(0L, 100L))
+    }
+    clock.advance(200)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      assert(results === Seq(0L, 100L, 200L, 300L))
+    }
+    assert(timer.stop(interruptTimer = true) === 300L)
+  }
+
+  test("SPARK-10224: call 'callback' after stopping") {
+    val clock = new ManualClock()
+    val results = new mutable.ArrayBuffer[Long]() with mutable.SynchronizedBuffer[Long]
+    val timer = new RecurringTimer(clock, 100, time => {
+      results += time
+    }, "RecurringTimerSuite-SPARK-10224")
+    timer.start(0)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      assert(results === Seq(0L))
+    }
+    @volatile var lastTime = -1L
+    // Now RecurringTimer is waiting for the next interval
+    val thread = new Thread {
+      override def run(): Unit = {
+        lastTime = timer.stop(interruptTimer = false)
+      }
+    }
+    thread.start()
+    val stopped = PrivateMethod[RecurringTimer]('stopped)
+    // Make sure the `stopped` field has been changed
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      assert(timer.invokePrivate(stopped()) === true)
+    }
+    clock.advance(200)
+    // When RecurringTimer is awake from clock.waitTillTime, it will call `callback` once.
+    // Then it will find `stopped` is true and exit the loop, but it should call `callback` again
+    // before exiting its internal thread.
+    thread.join()
+    assert(results === Seq(0L, 100L, 200L))
+    assert(lastTime === 200L)
+  }
+}

From 50e4634236668a0195390f0080d0ac230d428d05 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Wed, 23 Sep 2015 01:29:30 -0700
Subject: [PATCH 083/896] [SPARK-10769] [STREAMING] [TESTS] Fix
 o.a.s.streaming.CheckpointSuite.maintains rate controller

Fixed the following failure in https://amplab.cs.berkeley.edu/jenkins/job/NewSparkPullRequestBuilder/1787/testReport/junit/org.apache.spark.streaming/CheckpointSuite/recovery_maintains_rate_controller/
```
sbt.ForkMain$ForkError: The code passed to eventually never returned normally. Attempted 660 times over 10.000044392000001 seconds. Last failure message: 9223372036854775807 did not equal 200.
	at org.scalatest.concurrent.Eventually$class.tryTryAgain$1(Eventually.scala:420)
	at org.scalatest.concurrent.Eventually$class.eventually(Eventually.scala:438)
	at org.scalatest.concurrent.Eventually$.eventually(Eventually.scala:478)
	at org.scalatest.concurrent.Eventually$class.eventually(Eventually.scala:336)
	at org.scalatest.concurrent.Eventually$.eventually(Eventually.scala:478)
	at org.apache.spark.streaming.CheckpointSuite$$anonfun$15.apply$mcV$sp(CheckpointSuite.scala:413)
	at org.apache.spark.streaming.CheckpointSuite$$anonfun$15.apply(CheckpointSuite.scala:396)
	at org.apache.spark.streaming.CheckpointSuite$$anonfun$15.apply(CheckpointSuite.scala:396)
	at org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
	at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
	at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
	at org.scalatest.Transformer.apply(Transformer.scala:22)
```

In this test, it calls `advanceTimeWithRealDelay(ssc, 2)` to run two batch jobs. However, one race condition is these two jobs can finish before the receiver is registered. Then `UpdateRateLimit` won't be sent to the receiver and `getDefaultBlockGeneratorRateLimit` cannot be updated.

Here are the logs related to this issue:
```
15/09/22 19:28:26.154 pool-1-thread-1-ScalaTest-running-CheckpointSuite INFO CheckpointSuite: Manual clock before advancing = 2500

15/09/22 19:28:26.869 JobScheduler INFO JobScheduler: Finished job streaming job 3000 ms.0 from job set of time 3000 ms
15/09/22 19:28:26.869 JobScheduler INFO JobScheduler: Total delay: 1442975303.869 s for time 3000 ms (execution: 0.711 s)

15/09/22 19:28:26.873 JobScheduler INFO JobScheduler: Finished job streaming job 3500 ms.0 from job set of time 3500 ms
15/09/22 19:28:26.873 JobScheduler INFO JobScheduler: Total delay: 1442975303.373 s for time 3500 ms (execution: 0.004 s)

15/09/22 19:28:26.879 sparkDriver-akka.actor.default-dispatcher-3 INFO ReceiverTracker: Registered receiver for stream 0 from localhost:57749

15/09/22 19:28:27.154 pool-1-thread-1-ScalaTest-running-CheckpointSuite INFO CheckpointSuite: Manual clock after advancing = 3500
```
`advanceTimeWithRealDelay(ssc, 2)` triggered job 3000ms and 3500ms but the receiver was registered after job 3000ms and 3500ms finished.

So we should make sure the receiver online before running `advanceTimeWithRealDelay(ssc, 2)`.

Author: zsxwing <zsxwing@gmail.com>

Closes #8877 from zsxwing/SPARK-10769.
---
 .../scala/org/apache/spark/streaming/CheckpointSuite.scala  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
index 1bba7a143edf..a6956533c07a 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
@@ -408,10 +408,14 @@ class CheckpointSuite extends TestSuiteBase {
 
     ssc = new StreamingContext(checkpointDir)
     ssc.start()
-    val outputNew = advanceTimeWithRealDelay(ssc, 2)
 
     eventually(timeout(10.seconds)) {
       assert(RateTestReceiver.getActive().nonEmpty)
+    }
+
+    advanceTimeWithRealDelay(ssc, 2)
+
+    eventually(timeout(10.seconds)) {
       assert(RateTestReceiver.getActive().get.getDefaultBlockGeneratorRateLimit() === 200)
     }
     ssc.stop()

From 27bfa9ab3a610e072c011fd88ee4684cea6ceb76 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Wed, 23 Sep 2015 10:01:28 +0100
Subject: [PATCH 084/896] [SPARK-10721] Log warning when file deletion fails

Author: tedyu <yuzhihong@gmail.com>

Closes #8843 from tedyu/master.
---
 .../unsafe/sort/UnsafeSorterSpillReader.java        |  7 ++++++-
 .../org/apache/spark/api/python/PythonRDD.scala     |  7 +++++--
 .../org/apache/spark/deploy/RPackageUtils.scala     | 10 +++++++---
 .../spark/deploy/history/FsHistoryProvider.scala    |  8 ++++++--
 .../deploy/master/FileSystemPersistenceEngine.scala |  5 ++++-
 .../apache/spark/rdd/ReliableCheckpointRDD.scala    |  4 +++-
 .../spark/rdd/ReliableRDDCheckpointData.scala       |  6 ++++--
 .../spark/scheduler/EventLoggingListener.scala      |  8 ++++++--
 .../scheduler/cluster/SimrSchedulerBackend.scala    |  4 +++-
 .../spark/shuffle/FileShuffleBlockResolver.scala    |  5 ++++-
 .../spark/shuffle/IndexShuffleBlockResolver.scala   | 13 +++++++++----
 .../scala/org/apache/spark/storage/DiskStore.scala  | 10 ++++++++--
 .../util/collection/ExternalAppendOnlyMap.scala     |  8 ++++++--
 .../spark/util/collection/ExternalSorter.scala      |  4 +++-
 .../shuffle/ExternalShuffleBlockResolver.java       |  8 ++++++--
 15 files changed, 80 insertions(+), 27 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
index 4989b05d63e2..501dfe77d13c 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
@@ -24,12 +24,15 @@
 import org.apache.spark.storage.BlockId;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.unsafe.Platform;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Reads spill files written by {@link UnsafeSorterSpillWriter} (see that class for a description
  * of the file format).
  */
 final class UnsafeSorterSpillReader extends UnsafeSorterIterator {
+  private static final Logger logger = LoggerFactory.getLogger(UnsafeSorterSpillReader.class);
 
   private final File file;
   private InputStream in;
@@ -73,7 +76,9 @@ public void loadNext() throws IOException {
     numRecordsRemaining--;
     if (numRecordsRemaining == 0) {
       in.close();
-      file.delete();
+      if (!file.delete() && file.exists()) {
+        logger.warn("Unable to delete spill file {}", file.getPath());
+      }
       in = null;
       din = null;
     }
diff --git a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
index 3788d1829758..19be0939038b 100644
--- a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
@@ -871,7 +871,8 @@ private class PythonAccumulatorParam(@transient private val serverHost: String,
  * write the data into disk after deserialization, then Python can read it from disks.
  */
 // scalastyle:off no.finalize
-private[spark] class PythonBroadcast(@transient var path: String) extends Serializable {
+private[spark] class PythonBroadcast(@transient var path: String) extends Serializable
+  with Logging {
 
   /**
    * Read data from disks, then copy it to `out`
@@ -907,7 +908,9 @@ private[spark] class PythonBroadcast(@transient var path: String) extends Serial
     if (!path.isEmpty) {
       val file = new File(path)
       if (file.exists()) {
-        file.delete()
+        if (!file.delete()) {
+          logWarning(s"Error deleting ${file.getPath}")
+        }
       }
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala b/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
index 4b28866dcaa7..7d160b6790ea 100644
--- a/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
@@ -175,8 +175,10 @@ private[deploy] object RPackageUtils extends Logging {
               print(s"ERROR: Failed to build R package in $file.", printStream)
               print(RJarDoc, printStream)
             }
-          } finally {
-            rSource.delete() // clean up
+          } finally { // clean up
+            if (!rSource.delete()) {
+              logWarning(s"Error deleting ${rSource.getPath()}")
+            }
           }
         } else {
           if (verbose) {
@@ -211,7 +213,9 @@ private[deploy] object RPackageUtils extends Logging {
     val filesToBundle = listFilesRecursively(dir, Seq(".zip"))
     // create a zip file from scratch, do not append to existing file.
     val zipFile = new File(dir, name)
-    zipFile.delete()
+    if (!zipFile.delete()) {
+      logWarning(s"Error deleting ${zipFile.getPath()}")
+    }
     val zipOutputStream = new ZipOutputStream(new FileOutputStream(zipFile, false))
     try {
       filesToBundle.foreach { file =>
diff --git a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
index 8eb2ba1e8683..5eb8adf97d90 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
@@ -242,7 +242,9 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
         logError("Exception encountered when attempting to update last scan time", e)
         lastScanTime
     } finally {
-      fs.delete(path)
+      if (!fs.delete(path)) {
+        logWarning(s"Error deleting ${path}")
+      }
     }
   }
 
@@ -405,7 +407,9 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
         try {
           val path = new Path(logDir, attempt.logPath)
           if (fs.exists(path)) {
-            fs.delete(path, true)
+            if (!fs.delete(path, true)) {
+              logWarning(s"Error deleting ${path}")
+            }
           }
         } catch {
           case e: AccessControlException =>
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/FileSystemPersistenceEngine.scala b/core/src/main/scala/org/apache/spark/deploy/master/FileSystemPersistenceEngine.scala
index aa379d4cd61e..1aa8cd5013b4 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/FileSystemPersistenceEngine.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/FileSystemPersistenceEngine.scala
@@ -45,7 +45,10 @@ private[master] class FileSystemPersistenceEngine(
   }
 
   override def unpersist(name: String): Unit = {
-    new File(dir + File.separator + name).delete()
+    val f = new File(dir + File.separator + name)
+    if (!f.delete()) {
+      logWarning(s"Error deleting ${f.getPath()}")
+    }
   }
 
   override def read[T: ClassTag](prefix: String): Seq[T] = {
diff --git a/core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala b/core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala
index 1c3b5da19ceb..a69be6a068bb 100644
--- a/core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/ReliableCheckpointRDD.scala
@@ -144,7 +144,9 @@ private[spark] object ReliableCheckpointRDD extends Logging {
       } else {
         // Some other copy of this task must've finished before us and renamed it
         logInfo(s"Final output path $finalOutputPath already exists; not overwriting it")
-        fs.delete(tempOutputPath, false)
+        if (!fs.delete(tempOutputPath, false)) {
+          logWarning(s"Error deleting ${tempOutputPath}")
+        }
       }
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/rdd/ReliableRDDCheckpointData.scala b/core/src/main/scala/org/apache/spark/rdd/ReliableRDDCheckpointData.scala
index e9f6060301ba..91cad6662e4d 100644
--- a/core/src/main/scala/org/apache/spark/rdd/ReliableRDDCheckpointData.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/ReliableRDDCheckpointData.scala
@@ -89,7 +89,7 @@ private[spark] class ReliableRDDCheckpointData[T: ClassTag](@transient private v
 
 }
 
-private[spark] object ReliableRDDCheckpointData {
+private[spark] object ReliableRDDCheckpointData extends Logging {
 
   /** Return the path of the directory to which this RDD's checkpoint data is written. */
   def checkpointPath(sc: SparkContext, rddId: Int): Option[Path] = {
@@ -101,7 +101,9 @@ private[spark] object ReliableRDDCheckpointData {
     checkpointPath(sc, rddId).foreach { path =>
       val fs = path.getFileSystem(sc.hadoopConfiguration)
       if (fs.exists(path)) {
-        fs.delete(path, true)
+        if (!fs.delete(path, true)) {
+          logWarning(s"Error deleting ${path.toString()}")
+        }
       }
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/EventLoggingListener.scala b/core/src/main/scala/org/apache/spark/scheduler/EventLoggingListener.scala
index 5a06ef02f5c5..000a021a528c 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/EventLoggingListener.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/EventLoggingListener.scala
@@ -109,7 +109,9 @@ private[spark] class EventLoggingListener(
 
     if (shouldOverwrite && fileSystem.exists(path)) {
       logWarning(s"Event log $path already exists. Overwriting...")
-      fileSystem.delete(path, true)
+      if (!fileSystem.delete(path, true)) {
+        logWarning(s"Error deleting $path")
+      }
     }
 
     /* The Hadoop LocalFileSystem (r1.0.4) has known issues with syncing (HADOOP-7844).
@@ -216,7 +218,9 @@ private[spark] class EventLoggingListener(
     if (fileSystem.exists(target)) {
       if (shouldOverwrite) {
         logWarning(s"Event log $target already exists. Overwriting...")
-        fileSystem.delete(target, true)
+        if (!fileSystem.delete(target, true)) {
+          logWarning(s"Error deleting $target")
+        }
       } else {
         throw new IOException("Target log file already exists (%s)".format(logPath))
       }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SimrSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SimrSchedulerBackend.scala
index 0324c9dab910..641638a77d5f 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SimrSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SimrSchedulerBackend.scala
@@ -65,7 +65,9 @@ private[spark] class SimrSchedulerBackend(
   override def stop() {
     val conf = SparkHadoopUtil.get.newConfiguration(sc.conf)
     val fs = FileSystem.get(conf)
-    fs.delete(new Path(driverFilePath), false)
+    if (!fs.delete(new Path(driverFilePath), false)) {
+      logWarning(s"error deleting ${driverFilePath}")
+    }
     super.stop()
   }
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
index d9902f96dfd4..cd253a78c2b1 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
@@ -127,7 +127,10 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
       case Some(state) =>
         for (mapId <- state.completedMapTasks.asScala; reduceId <- 0 until state.numReducers) {
           val blockId = new ShuffleBlockId(shuffleId, mapId, reduceId)
-          blockManager.diskBlockManager.getFile(blockId).delete()
+          val file = blockManager.diskBlockManager.getFile(blockId)
+          if (!file.delete()) {
+            logWarning(s"Error deleting ${file.getPath()}")
+          }
         }
         logInfo("Deleted all files for shuffle " + shuffleId)
         true
diff --git a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
index d0163d326dba..65887d119d65 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
@@ -21,7 +21,7 @@ import java.io._
 
 import com.google.common.io.ByteStreams
 
-import org.apache.spark.{SparkConf, SparkEnv}
+import org.apache.spark.{SparkConf, SparkEnv, Logging}
 import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
 import org.apache.spark.network.netty.SparkTransportConf
 import org.apache.spark.storage._
@@ -40,7 +40,8 @@ import IndexShuffleBlockResolver.NOOP_REDUCE_ID
  */
 // Note: Changes to the format in this file should be kept in sync with
 // org.apache.spark.network.shuffle.ExternalShuffleBlockResolver#getSortBasedShuffleBlockData().
-private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleBlockResolver {
+private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleBlockResolver
+  with Logging {
 
   private lazy val blockManager = SparkEnv.get.blockManager
 
@@ -60,12 +61,16 @@ private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleB
   def removeDataByMap(shuffleId: Int, mapId: Int): Unit = {
     var file = getDataFile(shuffleId, mapId)
     if (file.exists()) {
-      file.delete()
+      if (!file.delete()) {
+        logWarning(s"Error deleting data ${file.getPath()}")
+      }
     }
 
     file = getIndexFile(shuffleId, mapId)
     if (file.exists()) {
-      file.delete()
+      if (!file.delete()) {
+        logWarning(s"Error deleting index ${file.getPath()}")
+      }
     }
   }
 
diff --git a/core/src/main/scala/org/apache/spark/storage/DiskStore.scala b/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
index feb9533604ff..c008b9dc1632 100644
--- a/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
+++ b/core/src/main/scala/org/apache/spark/storage/DiskStore.scala
@@ -86,7 +86,9 @@ private[spark] class DiskStore(blockManager: BlockManager, diskManager: DiskBloc
     } catch {
       case e: Throwable =>
         if (file.exists()) {
-          file.delete()
+          if (!file.delete()) {
+            logWarning(s"Error deleting ${file}")
+          }
         }
         throw e
     }
@@ -155,7 +157,11 @@ private[spark] class DiskStore(blockManager: BlockManager, diskManager: DiskBloc
   override def remove(blockId: BlockId): Boolean = {
     val file = diskManager.getFile(blockId.name)
     if (file.exists()) {
-      file.delete()
+      val ret = file.delete()
+      if (!ret) {
+        logWarning(s"Error deleting ${file.getPath()}")
+      }
+      ret
     } else {
       false
     }
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
index f929b12606f0..29c5732f5a8c 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
@@ -208,7 +208,9 @@ class ExternalAppendOnlyMap[K, V, C](
           writer.revertPartialWritesAndClose()
         }
         if (file.exists()) {
-          file.delete()
+          if (!file.delete()) {
+            logWarning(s"Error deleting ${file}")
+          }
         }
       }
     }
@@ -489,7 +491,9 @@ class ExternalAppendOnlyMap[K, V, C](
         fileStream = null
       }
       if (file.exists()) {
-        file.delete()
+        if (!file.delete()) {
+          logWarning(s"Error deleting ${file}")
+        }
       }
     }
 
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index 2a30f751ff03..749be34d8e8f 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -318,7 +318,9 @@ private[spark] class ExternalSorter[K, V, C](
           writer.revertPartialWritesAndClose()
         }
         if (file.exists()) {
-          file.delete()
+          if (!file.delete()) {
+            logWarning(s"Error deleting ${file}")
+          }
         }
       }
     }
diff --git a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
index c5f93bb47f55..0d4dd6afac76 100644
--- a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
+++ b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolver.java
@@ -114,10 +114,14 @@ public ExternalShuffleBlockResolver(TransportConf conf, File registeredExecutorF
             "recover state for existing applications", registeredExecutorFile, e);
           if (registeredExecutorFile.isDirectory()) {
             for (File f : registeredExecutorFile.listFiles()) {
-              f.delete();
+              if (!f.delete()) {
+                logger.warn("error deleting {}", f.getPath());
+              }
             }
           }
-          registeredExecutorFile.delete();
+          if (!registeredExecutorFile.delete()) {
+            logger.warn("error deleting {}", registeredExecutorFile.getPath());
+          }
           options.createIfMissing(true);
           try {
             tmpDb = JniDBFactory.factory.open(registeredExecutorFile, options);

From a18208047f06a4244703c17023bb20cbe1f59d73 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 23 Sep 2015 11:31:01 -0700
Subject: [PATCH 085/896] [SPARK-10403] Allow UnsafeRowSerializer to work with
 tungsten-sort ShuffleManager

This patch attempts to fix an issue where Spark SQL's UnsafeRowSerializer was incompatible with the `tungsten-sort` ShuffleManager.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8873 from JoshRosen/SPARK-10403.
---
 .../sql/execution/UnsafeRowSerializer.scala   | 22 +++++++++---------
 .../execution/UnsafeRowSerializerSuite.scala  | 23 +++++++++++++------
 2 files changed, 27 insertions(+), 18 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/UnsafeRowSerializer.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/UnsafeRowSerializer.scala
index e060c06d9e2a..7e981268de39 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/UnsafeRowSerializer.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/UnsafeRowSerializer.scala
@@ -45,16 +45,9 @@ private[sql] class UnsafeRowSerializer(numFields: Int) extends Serializer with S
 }
 
 private class UnsafeRowSerializerInstance(numFields: Int) extends SerializerInstance {
-
-  /**
-   * Marks the end of a stream written with [[serializeStream()]].
-   */
-  private[this] val EOF: Int = -1
-
   /**
    * Serializes a stream of UnsafeRows. Within the stream, each record consists of a record
    * length (stored as a 4-byte integer, written high byte first), followed by the record's bytes.
-   * The end of the stream is denoted by a record with the special length `EOF` (-1).
    */
   override def serializeStream(out: OutputStream): SerializationStream = new SerializationStream {
     private[this] var writeBuffer: Array[Byte] = new Array[Byte](4096)
@@ -92,7 +85,6 @@ private class UnsafeRowSerializerInstance(numFields: Int) extends SerializerInst
 
     override def close(): Unit = {
       writeBuffer = null
-      dOut.writeInt(EOF)
       dOut.close()
     }
   }
@@ -104,12 +96,20 @@ private class UnsafeRowSerializerInstance(numFields: Int) extends SerializerInst
       private[this] var rowBuffer: Array[Byte] = new Array[Byte](1024)
       private[this] var row: UnsafeRow = new UnsafeRow()
       private[this] var rowTuple: (Int, UnsafeRow) = (0, row)
+      private[this] val EOF: Int = -1
 
       override def asKeyValueIterator: Iterator[(Int, UnsafeRow)] = {
         new Iterator[(Int, UnsafeRow)] {
-          private[this] var rowSize: Int = dIn.readInt()
-          if (rowSize == EOF) dIn.close()
 
+          private[this] def readSize(): Int = try {
+            dIn.readInt()
+          } catch {
+            case e: EOFException =>
+              dIn.close()
+              EOF
+          }
+
+          private[this] var rowSize: Int = readSize()
           override def hasNext: Boolean = rowSize != EOF
 
           override def next(): (Int, UnsafeRow) = {
@@ -118,7 +118,7 @@ private class UnsafeRowSerializerInstance(numFields: Int) extends SerializerInst
             }
             ByteStreams.readFully(dIn, rowBuffer, 0, rowSize)
             row.pointTo(rowBuffer, Platform.BYTE_ARRAY_OFFSET, numFields, rowSize)
-            rowSize = dIn.readInt() // read the next row's size
+            rowSize = readSize()
             if (rowSize == EOF) { // We are returning the last row in this stream
               dIn.close()
               val _rowTuple = rowTuple
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
index 0113d052e338..f7d48bc53ebb 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
@@ -17,9 +17,10 @@
 
 package org.apache.spark.sql.execution
 
-import java.io.{File, DataOutputStream, ByteArrayInputStream, ByteArrayOutputStream}
+import java.io.{File, ByteArrayInputStream, ByteArrayOutputStream}
 
 import org.apache.spark.executor.ShuffleWriteMetrics
+import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.ShuffleBlockId
 import org.apache.spark.util.collection.ExternalSorter
 import org.apache.spark.util.Utils
@@ -41,7 +42,7 @@ class ClosableByteArrayInputStream(buf: Array[Byte]) extends ByteArrayInputStrea
   }
 }
 
-class UnsafeRowSerializerSuite extends SparkFunSuite {
+class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
 
   private def toUnsafeRow(row: Row, schema: Array[DataType]): UnsafeRow = {
     val converter = unsafeRowConverter(schema)
@@ -87,11 +88,7 @@ class UnsafeRowSerializerSuite extends SparkFunSuite {
   }
 
   test("close empty input stream") {
-    val baos = new ByteArrayOutputStream()
-    val dout = new DataOutputStream(baos)
-    dout.writeInt(-1)  // EOF
-    dout.flush()
-    val input = new ClosableByteArrayInputStream(baos.toByteArray)
+    val input = new ClosableByteArrayInputStream(Array.empty)
     val serializer = new UnsafeRowSerializer(numFields = 2).newInstance()
     val deserializerIter = serializer.deserializeStream(input).asKeyValueIterator
     assert(!deserializerIter.hasNext)
@@ -143,4 +140,16 @@ class UnsafeRowSerializerSuite extends SparkFunSuite {
       }
     }
   }
+
+  test("SPARK-10403: unsafe row serializer with UnsafeShuffleManager") {
+    val conf = new SparkConf()
+      .set("spark.shuffle.manager", "tungsten-sort")
+    sc = new SparkContext("local", "test", conf)
+    val row = Row("Hello", 123)
+    val unsafeRow = toUnsafeRow(row, Array(StringType, IntegerType))
+    val rowsRDD = sc.parallelize(Seq((0, unsafeRow), (1, unsafeRow), (0, unsafeRow)))
+      .asInstanceOf[RDD[Product2[Int, InternalRow]]]
+    val shuffled = new ShuffledRowRDD(rowsRDD, new UnsafeRowSerializer(2), 2)
+    shuffled.count()
+  }
 }

From 098be27ad53c485ee2fc7f5871c47f899020e87b Mon Sep 17 00:00:00 2001
From: sethah <seth.hendrickson16@gmail.com>
Date: Wed, 23 Sep 2015 15:00:52 -0700
Subject: [PATCH 086/896] [SPARK-9715] [ML] Store numFeatures in all ML
 PredictionModel types

All prediction models should store `numFeatures` indicating the number of features the model was trained on. Default value of -1 added for backwards compatibility.

Author: sethah <seth.hendrickson16@gmail.com>

Closes #8675 from sethah/SPARK-9715.
---
 .../examples/ml/JavaDeveloperApiExample.java  |  5 ++++
 .../examples/ml/DeveloperApiExample.scala     |  3 +++
 .../scala/org/apache/spark/ml/Predictor.scala |  6 ++++-
 .../DecisionTreeClassifier.scala              | 13 ++++++----
 .../ml/classification/GBTClassifier.scala     | 26 ++++++++++++++-----
 .../classification/LogisticRegression.scala   |  2 ++
 .../MultilayerPerceptronClassifier.scala      |  2 ++
 .../spark/ml/classification/NaiveBayes.scala  |  2 ++
 .../RandomForestClassifier.scala              |  8 +++---
 .../ml/regression/DecisionTreeRegressor.scala | 13 ++++++----
 .../spark/ml/regression/GBTRegressor.scala    | 24 ++++++++++++-----
 .../ml/regression/LinearRegression.scala      |  2 ++
 .../ml/regression/RandomForestRegressor.scala |  7 ++---
 .../spark/ml/tree/impl/RandomForest.scala     | 14 +++++++---
 .../DecisionTreeClassifierSuite.scala         |  4 ++-
 .../classification/GBTClassifierSuite.scala   | 11 +++++---
 .../LogisticRegressionSuite.scala             |  2 ++
 .../MultilayerPerceptronClassifierSuite.scala |  4 ++-
 .../ProbabilisticClassifierSuite.scala        |  6 +++--
 .../RandomForestClassifierSuite.scala         |  8 +++---
 .../DecisionTreeRegressorSuite.scala          |  2 ++
 .../ml/regression/GBTRegressorSuite.scala     |  7 +++--
 .../ml/regression/LinearRegressionSuite.scala |  4 ++-
 .../RandomForestRegressorSuite.scala          |  2 ++
 .../ml/tree/impl/RandomForestSuite.scala      |  3 ++-
 25 files changed, 130 insertions(+), 50 deletions(-)

diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaDeveloperApiExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaDeveloperApiExample.java
index a377694507d2..0b4c0d9ba9f8 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaDeveloperApiExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaDeveloperApiExample.java
@@ -219,6 +219,11 @@ public Vector predictRaw(Vector features) {
    */
   public int numClasses() { return 2; }
 
+  /**
+   * Number of features the model was trained on.
+   */
+  public int numFeatures() { return weights_.size(); }
+
   /**
    * Create a copy of the model.
    * The copy is shallow, except for the embedded paramMap, which gets a deep copy.
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DeveloperApiExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DeveloperApiExample.scala
index 340c3559b15e..3758edc56198 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DeveloperApiExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DeveloperApiExample.scala
@@ -172,6 +172,9 @@ private class MyLogisticRegressionModel(
   /** Number of classes the label can take.  2 indicates binary classification. */
   override val numClasses: Int = 2
 
+  /** Number of features the model was trained on. */
+  override val numFeatures: Int = weights.size
+
   /**
    * Create a copy of the model.
    * The copy is shallow, except for the embedded paramMap, which gets a deep copy.
diff --git a/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala b/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
index 19fe039b8fd0..e0dcd427fae2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Predictor.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml
 
-import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util.SchemaUtils
@@ -145,6 +145,10 @@ abstract class PredictionModel[FeaturesType, M <: PredictionModel[FeaturesType,
   /** @group setParam */
   def setPredictionCol(value: String): M = set(predictionCol, value).asInstanceOf[M]
 
+  /** Returns the number of features the model was trained on. If unknown, returns -1 */
+  @Since("1.6.0")
+  def numFeatures: Int = -1
+
   /**
    * Returns the SQL DataType corresponding to the FeaturesType type parameter.
    *
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
index b8eb49f9bdb4..a6f6d463bffb 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
@@ -107,6 +107,7 @@ object DecisionTreeClassifier {
 final class DecisionTreeClassificationModel private[ml] (
     override val uid: String,
     override val rootNode: Node,
+    override val numFeatures: Int,
     override val numClasses: Int)
   extends ProbabilisticClassificationModel[Vector, DecisionTreeClassificationModel]
   with DecisionTreeModel with Serializable {
@@ -118,8 +119,8 @@ final class DecisionTreeClassificationModel private[ml] (
    * Construct a decision tree classification model.
    * @param rootNode  Root node of tree, with other nodes attached.
    */
-  private[ml] def this(rootNode: Node, numClasses: Int) =
-    this(Identifiable.randomUID("dtc"), rootNode, numClasses)
+  private[ml] def this(rootNode: Node, numFeatures: Int, numClasses: Int) =
+    this(Identifiable.randomUID("dtc"), rootNode, numFeatures, numClasses)
 
   override protected def predict(features: Vector): Double = {
     rootNode.predictImpl(features).prediction
@@ -141,7 +142,7 @@ final class DecisionTreeClassificationModel private[ml] (
   }
 
   override def copy(extra: ParamMap): DecisionTreeClassificationModel = {
-    copyValues(new DecisionTreeClassificationModel(uid, rootNode, numClasses), extra)
+    copyValues(new DecisionTreeClassificationModel(uid, rootNode, numFeatures, numClasses), extra)
       .setParent(parent)
   }
 
@@ -161,12 +162,14 @@ private[ml] object DecisionTreeClassificationModel {
   def fromOld(
       oldModel: OldDecisionTreeModel,
       parent: DecisionTreeClassifier,
-      categoricalFeatures: Map[Int, Int]): DecisionTreeClassificationModel = {
+      categoricalFeatures: Map[Int, Int],
+      numFeatures: Int = -1): DecisionTreeClassificationModel = {
     require(oldModel.algo == OldAlgo.Classification,
       s"Cannot convert non-classification DecisionTreeModel (old API) to" +
         s" DecisionTreeClassificationModel (new API).  Algo is: ${oldModel.algo}")
     val rootNode = Node.fromOld(oldModel.topNode, categoricalFeatures)
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("dtc")
-    new DecisionTreeClassificationModel(uid, rootNode, -1)
+    // Can't infer number of features from old model, so default to -1
+    new DecisionTreeClassificationModel(uid, rootNode, numFeatures, -1)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
index ad8683648b97..74aef94bf767 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/GBTClassifier.scala
@@ -33,7 +33,7 @@ import org.apache.spark.mllib.tree.configuration.{Algo => OldAlgo}
 import org.apache.spark.mllib.tree.loss.{LogLoss => OldLogLoss, Loss => OldLoss}
 import org.apache.spark.mllib.tree.model.{GradientBoostedTreesModel => OldGBTModel}
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.DataFrame
+import org.apache.spark.sql.{Row, DataFrame}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types.DoubleType
 
@@ -138,10 +138,11 @@ final class GBTClassifier(override val uid: String)
     require(numClasses == 2,
       s"GBTClassifier only supports binary classification but was given numClasses = $numClasses")
     val oldDataset: RDD[LabeledPoint] = extractLabeledPoints(dataset)
+    val numFeatures = oldDataset.first().features.size
     val boostingStrategy = super.getOldBoostingStrategy(categoricalFeatures, OldAlgo.Classification)
     val oldGBT = new OldGBT(boostingStrategy)
     val oldModel = oldGBT.run(oldDataset)
-    GBTClassificationModel.fromOld(oldModel, this, categoricalFeatures)
+    GBTClassificationModel.fromOld(oldModel, this, categoricalFeatures, numFeatures)
   }
 
   override def copy(extra: ParamMap): GBTClassifier = defaultCopy(extra)
@@ -164,10 +165,11 @@ object GBTClassifier {
  * @param _treeWeights  Weights for the decision trees in the ensemble.
  */
 @Experimental
-final class GBTClassificationModel(
+final class GBTClassificationModel private[ml](
     override val uid: String,
     private val _trees: Array[DecisionTreeRegressionModel],
-    private val _treeWeights: Array[Double])
+    private val _treeWeights: Array[Double],
+    override val numFeatures: Int)
   extends PredictionModel[Vector, GBTClassificationModel]
   with TreeEnsembleModel with Serializable {
 
@@ -175,6 +177,14 @@ final class GBTClassificationModel(
   require(_trees.length == _treeWeights.length, "GBTClassificationModel given trees, treeWeights" +
     s" of non-matching lengths (${_trees.length}, ${_treeWeights.length}, respectively).")
 
+  /**
+   * Construct a GBTClassificationModel
+   * @param _trees  Decision trees in the ensemble.
+   * @param _treeWeights  Weights for the decision trees in the ensemble.
+   */
+  def this(uid: String, _trees: Array[DecisionTreeRegressionModel], _treeWeights: Array[Double]) =
+    this(uid, _trees, _treeWeights, -1)
+
   override def trees: Array[DecisionTreeModel] = _trees.asInstanceOf[Array[DecisionTreeModel]]
 
   override def treeWeights: Array[Double] = _treeWeights
@@ -196,7 +206,8 @@ final class GBTClassificationModel(
   }
 
   override def copy(extra: ParamMap): GBTClassificationModel = {
-    copyValues(new GBTClassificationModel(uid, _trees, _treeWeights), extra).setParent(parent)
+    copyValues(new GBTClassificationModel(uid, _trees, _treeWeights, numFeatures),
+      extra).setParent(parent)
   }
 
   override def toString: String = {
@@ -215,7 +226,8 @@ private[ml] object GBTClassificationModel {
   def fromOld(
       oldModel: OldGBTModel,
       parent: GBTClassifier,
-      categoricalFeatures: Map[Int, Int]): GBTClassificationModel = {
+      categoricalFeatures: Map[Int, Int],
+      numFeatures: Int = -1): GBTClassificationModel = {
     require(oldModel.algo == OldAlgo.Classification, "Cannot convert GradientBoostedTreesModel" +
       s" with algo=${oldModel.algo} (old API) to GBTClassificationModel (new API).")
     val newTrees = oldModel.trees.map { tree =>
@@ -223,6 +235,6 @@ private[ml] object GBTClassificationModel {
       DecisionTreeRegressionModel.fromOld(tree, null, categoricalFeatures)
     }
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("gbtc")
-    new GBTClassificationModel(parent.uid, newTrees, oldModel.treeWeights)
+    new GBTClassificationModel(parent.uid, newTrees, oldModel.treeWeights, numFeatures)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index bd96e8d000ff..c17a7b0c361e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -426,6 +426,8 @@ class LogisticRegressionModel private[ml] (
     1.0 / (1.0 + math.exp(-m))
   }
 
+  override val numFeatures: Int = weights.size
+
   override val numClasses: Int = 2
 
   private var trainingSummary: Option[LogisticRegressionTrainingSummary] = None
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
index 5f60dea91fcf..cd7462596dd9 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifier.scala
@@ -181,6 +181,8 @@ class MultilayerPerceptronClassificationModel private[ml] (
   extends PredictionModel[Vector, MultilayerPerceptronClassificationModel]
   with Serializable {
 
+  override val numFeatures: Int = layers.head
+
   private val mlpModel = FeedForwardTopology.multiLayerPerceptron(layers, true).getInstance(weights)
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
index 082ea1ffad58..a14dcecbaf5b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
@@ -137,6 +137,8 @@ class NaiveBayesModel private[ml] (
       throw new UnknownError(s"Invalid modelType: ${$(modelType)}.")
   }
 
+  override val numFeatures: Int = theta.numCols
+
   override val numClasses: Int = pi.size
 
   private def multinomialCalculation(features: Vector) = {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
index a6ebee1bb10a..bae329692a68 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/RandomForestClassifier.scala
@@ -119,13 +119,12 @@ object RandomForestClassifier {
  * features.
  * @param _trees  Decision trees in the ensemble.
  *               Warning: These have null parents.
- * @param numFeatures  Number of features used by this model
  */
 @Experimental
 final class RandomForestClassificationModel private[ml] (
     override val uid: String,
     private val _trees: Array[DecisionTreeClassificationModel],
-    val numFeatures: Int,
+    override val numFeatures: Int,
     override val numClasses: Int)
   extends ProbabilisticClassificationModel[Vector, RandomForestClassificationModel]
   with TreeEnsembleModel with Serializable {
@@ -226,7 +225,8 @@ private[ml] object RandomForestClassificationModel {
       oldModel: OldRandomForestModel,
       parent: RandomForestClassifier,
       categoricalFeatures: Map[Int, Int],
-      numClasses: Int): RandomForestClassificationModel = {
+      numClasses: Int,
+      numFeatures: Int = -1): RandomForestClassificationModel = {
     require(oldModel.algo == OldAlgo.Classification, "Cannot convert RandomForestModel" +
       s" with algo=${oldModel.algo} (old API) to RandomForestClassificationModel (new API).")
     val newTrees = oldModel.trees.map { tree =>
@@ -234,6 +234,6 @@ private[ml] object RandomForestClassificationModel {
       DecisionTreeClassificationModel.fromOld(tree, null, categoricalFeatures)
     }
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("rfc")
-    new RandomForestClassificationModel(uid, newTrees, -1, numClasses)
+    new RandomForestClassificationModel(uid, newTrees, numFeatures, numClasses)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
index d9a244bea28d..88b79a4eb82b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
@@ -96,7 +96,8 @@ object DecisionTreeRegressor {
 @Experimental
 final class DecisionTreeRegressionModel private[ml] (
     override val uid: String,
-    override val rootNode: Node)
+    override val rootNode: Node,
+    override val numFeatures: Int)
   extends PredictionModel[Vector, DecisionTreeRegressionModel]
   with DecisionTreeModel with Serializable {
 
@@ -107,14 +108,15 @@ final class DecisionTreeRegressionModel private[ml] (
    * Construct a decision tree regression model.
    * @param rootNode  Root node of tree, with other nodes attached.
    */
-  private[ml] def this(rootNode: Node) = this(Identifiable.randomUID("dtr"), rootNode)
+  private[ml] def this(rootNode: Node, numFeatures: Int) =
+    this(Identifiable.randomUID("dtr"), rootNode, numFeatures)
 
   override protected def predict(features: Vector): Double = {
     rootNode.predictImpl(features).prediction
   }
 
   override def copy(extra: ParamMap): DecisionTreeRegressionModel = {
-    copyValues(new DecisionTreeRegressionModel(uid, rootNode), extra).setParent(parent)
+    copyValues(new DecisionTreeRegressionModel(uid, rootNode, numFeatures), extra).setParent(parent)
   }
 
   override def toString: String = {
@@ -133,12 +135,13 @@ private[ml] object DecisionTreeRegressionModel {
   def fromOld(
       oldModel: OldDecisionTreeModel,
       parent: DecisionTreeRegressor,
-      categoricalFeatures: Map[Int, Int]): DecisionTreeRegressionModel = {
+      categoricalFeatures: Map[Int, Int],
+      numFeatures: Int = -1): DecisionTreeRegressionModel = {
     require(oldModel.algo == OldAlgo.Regression,
       s"Cannot convert non-regression DecisionTreeModel (old API) to" +
         s" DecisionTreeRegressionModel (new API).  Algo is: ${oldModel.algo}")
     val rootNode = Node.fromOld(oldModel.topNode, categoricalFeatures)
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("dtr")
-    new DecisionTreeRegressionModel(uid, rootNode)
+    new DecisionTreeRegressionModel(uid, rootNode, numFeatures)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
index d841ecb9e58d..65b5b3e0727d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
@@ -128,10 +128,11 @@ final class GBTRegressor(override val uid: String)
     val categoricalFeatures: Map[Int, Int] =
       MetadataUtils.getCategoricalFeatures(dataset.schema($(featuresCol)))
     val oldDataset: RDD[LabeledPoint] = extractLabeledPoints(dataset)
+    val numFeatures = oldDataset.first().features.size
     val boostingStrategy = super.getOldBoostingStrategy(categoricalFeatures, OldAlgo.Regression)
     val oldGBT = new OldGBT(boostingStrategy)
     val oldModel = oldGBT.run(oldDataset)
-    GBTRegressionModel.fromOld(oldModel, this, categoricalFeatures)
+    GBTRegressionModel.fromOld(oldModel, this, categoricalFeatures, numFeatures)
   }
 
   override def copy(extra: ParamMap): GBTRegressor = defaultCopy(extra)
@@ -154,10 +155,11 @@ object GBTRegressor {
  * @param _treeWeights  Weights for the decision trees in the ensemble.
  */
 @Experimental
-final class GBTRegressionModel(
+final class GBTRegressionModel private[ml](
     override val uid: String,
     private val _trees: Array[DecisionTreeRegressionModel],
-    private val _treeWeights: Array[Double])
+    private val _treeWeights: Array[Double],
+    override val numFeatures: Int)
   extends PredictionModel[Vector, GBTRegressionModel]
   with TreeEnsembleModel with Serializable {
 
@@ -165,6 +167,14 @@ final class GBTRegressionModel(
   require(_trees.length == _treeWeights.length, "GBTRegressionModel given trees, treeWeights of" +
     s" non-matching lengths (${_trees.length}, ${_treeWeights.length}, respectively).")
 
+  /**
+   * Construct a GBTRegressionModel
+   * @param _trees  Decision trees in the ensemble.
+   * @param _treeWeights  Weights for the decision trees in the ensemble.
+   */
+  def this(uid: String, _trees: Array[DecisionTreeRegressionModel], _treeWeights: Array[Double]) =
+    this(uid, _trees, _treeWeights, -1)
+
   override def trees: Array[DecisionTreeModel] = _trees.asInstanceOf[Array[DecisionTreeModel]]
 
   override def treeWeights: Array[Double] = _treeWeights
@@ -185,7 +195,8 @@ final class GBTRegressionModel(
   }
 
   override def copy(extra: ParamMap): GBTRegressionModel = {
-    copyValues(new GBTRegressionModel(uid, _trees, _treeWeights), extra).setParent(parent)
+    copyValues(new GBTRegressionModel(uid, _trees, _treeWeights, numFeatures),
+      extra).setParent(parent)
   }
 
   override def toString: String = {
@@ -204,7 +215,8 @@ private[ml] object GBTRegressionModel {
   def fromOld(
       oldModel: OldGBTModel,
       parent: GBTRegressor,
-      categoricalFeatures: Map[Int, Int]): GBTRegressionModel = {
+      categoricalFeatures: Map[Int, Int],
+      numFeatures: Int = -1): GBTRegressionModel = {
     require(oldModel.algo == OldAlgo.Regression, "Cannot convert GradientBoostedTreesModel" +
       s" with algo=${oldModel.algo} (old API) to GBTRegressionModel (new API).")
     val newTrees = oldModel.trees.map { tree =>
@@ -212,6 +224,6 @@ private[ml] object GBTRegressionModel {
       DecisionTreeRegressionModel.fromOld(tree, null, categoricalFeatures)
     }
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("gbtr")
-    new GBTRegressionModel(parent.uid, newTrees, oldModel.treeWeights)
+    new GBTRegressionModel(parent.uid, newTrees, oldModel.treeWeights, numFeatures)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 78a67c5fdab2..a77e702141b3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -293,6 +293,8 @@ class LinearRegressionModel private[ml] (
 
   private var trainingSummary: Option[LinearRegressionTrainingSummary] = None
 
+  override val numFeatures: Int = weights.size
+
   /**
    * Gets summary (e.g. residuals, mse, r-squared ) of model on training set. An exception is
    * thrown if `trainingSummary == None`.
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
index ddb7214416a6..64fc17247cce 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
@@ -115,7 +115,7 @@ object RandomForestRegressor {
 final class RandomForestRegressionModel private[ml] (
     override val uid: String,
     private val _trees: Array[DecisionTreeRegressionModel],
-    val numFeatures: Int)
+    override val numFeatures: Int)
   extends PredictionModel[Vector, RandomForestRegressionModel]
   with TreeEnsembleModel with Serializable {
 
@@ -187,13 +187,14 @@ private[ml] object RandomForestRegressionModel {
   def fromOld(
       oldModel: OldRandomForestModel,
       parent: RandomForestRegressor,
-      categoricalFeatures: Map[Int, Int]): RandomForestRegressionModel = {
+      categoricalFeatures: Map[Int, Int],
+      numFeatures: Int = -1): RandomForestRegressionModel = {
     require(oldModel.algo == OldAlgo.Regression, "Cannot convert RandomForestModel" +
       s" with algo=${oldModel.algo} (old API) to RandomForestRegressionModel (new API).")
     val newTrees = oldModel.trees.map { tree =>
       // parent for each tree is null since there is no good way to set this.
       DecisionTreeRegressionModel.fromOld(tree, null, categoricalFeatures)
     }
-    new RandomForestRegressionModel(parent.uid, newTrees, -1)
+    new RandomForestRegressionModel(parent.uid, newTrees, numFeatures)
   }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
index 4ac51a475474..c494556085e9 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
@@ -179,22 +179,28 @@ private[ml] object RandomForest extends Logging {
       }
     }
 
+    val numFeatures = metadata.numFeatures
+
     parentUID match {
       case Some(uid) =>
         if (strategy.algo == OldAlgo.Classification) {
           topNodes.map { rootNode =>
-            new DecisionTreeClassificationModel(uid, rootNode.toNode, strategy.getNumClasses)
+            new DecisionTreeClassificationModel(uid, rootNode.toNode, numFeatures,
+              strategy.getNumClasses)
           }
         } else {
-          topNodes.map(rootNode => new DecisionTreeRegressionModel(uid, rootNode.toNode))
+          topNodes.map { rootNode =>
+            new DecisionTreeRegressionModel(uid, rootNode.toNode, numFeatures)
+          }
         }
       case None =>
         if (strategy.algo == OldAlgo.Classification) {
           topNodes.map { rootNode =>
-            new DecisionTreeClassificationModel(rootNode.toNode, strategy.getNumClasses)
+            new DecisionTreeClassificationModel(rootNode.toNode, numFeatures,
+              strategy.getNumClasses)
           }
         } else {
-          topNodes.map(rootNode => new DecisionTreeRegressionModel(rootNode.toNode))
+          topNodes.map(rootNode => new DecisionTreeRegressionModel(rootNode.toNode, numFeatures))
         }
     }
   }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
index f680d8d3c4cc..815f6fd99758 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
@@ -59,7 +59,7 @@ class DecisionTreeClassifierSuite extends SparkFunSuite with MLlibTestSparkConte
 
   test("params") {
     ParamsSuite.checkParams(new DecisionTreeClassifier)
-    val model = new DecisionTreeClassificationModel("dtc", new LeafNode(0.0, 0.0, null), 2)
+    val model = new DecisionTreeClassificationModel("dtc", new LeafNode(0.0, 0.0, null), 1, 2)
     ParamsSuite.checkParams(model)
   }
 
@@ -310,6 +310,7 @@ private[ml] object DecisionTreeClassifierSuite extends SparkFunSuite {
       dt: DecisionTreeClassifier,
       categoricalFeatures: Map[Int, Int],
       numClasses: Int): Unit = {
+    val numFeatures = data.first().features.size
     val oldStrategy = dt.getOldStrategy(categoricalFeatures, numClasses)
     val oldTree = OldDecisionTree.train(data, oldStrategy)
     val newData: DataFrame = TreeTests.setMetadata(data, categoricalFeatures, numClasses)
@@ -318,5 +319,6 @@ private[ml] object DecisionTreeClassifierSuite extends SparkFunSuite {
     val oldTreeAsNew = DecisionTreeClassificationModel.fromOld(
       oldTree, newTree.parent.asInstanceOf[DecisionTreeClassifier], categoricalFeatures)
     TreeTests.checkEqual(oldTreeAsNew, newTree)
+    assert(newTree.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/GBTClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/GBTClassifierSuite.scala
index e3909bccaa5c..039141aeb6f6 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/GBTClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/GBTClassifierSuite.scala
@@ -59,8 +59,8 @@ class GBTClassifierSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("params") {
     ParamsSuite.checkParams(new GBTClassifier)
     val model = new GBTClassificationModel("gbtc",
-      Array(new DecisionTreeRegressionModel("dtr", new LeafNode(0.0, 0.0, null))),
-      Array(1.0))
+      Array(new DecisionTreeRegressionModel("dtr", new LeafNode(0.0, 0.0, null), 1)),
+      Array(1.0), 1)
     ParamsSuite.checkParams(model)
   }
 
@@ -145,7 +145,7 @@ class GBTClassifierSuite extends SparkFunSuite with MLlibTestSparkContext {
   */
 }
 
-private object GBTClassifierSuite {
+private object GBTClassifierSuite extends SparkFunSuite {
 
   /**
    * Train 2 models on the given dataset, one using the old API and one using the new API.
@@ -156,6 +156,7 @@ private object GBTClassifierSuite {
       validationData: Option[RDD[LabeledPoint]],
       gbt: GBTClassifier,
       categoricalFeatures: Map[Int, Int]): Unit = {
+    val numFeatures = data.first().features.size
     val oldBoostingStrategy =
       gbt.getOldBoostingStrategy(categoricalFeatures, OldAlgo.Classification)
     val oldGBT = new OldGBT(oldBoostingStrategy)
@@ -164,7 +165,9 @@ private object GBTClassifierSuite {
     val newModel = gbt.fit(newData)
     // Use parent from newTree since this is not checked anyways.
     val oldModelAsNew = GBTClassificationModel.fromOld(
-      oldModel, newModel.parent.asInstanceOf[GBTClassifier], categoricalFeatures)
+      oldModel, newModel.parent.asInstanceOf[GBTClassifier], categoricalFeatures, numFeatures)
     TreeTests.checkEqual(oldModelAsNew, newModel)
+    assert(newModel.numFeatures === numFeatures)
+    assert(oldModelAsNew.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index f5219f9f574b..ec01998601fb 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -194,6 +194,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     val model = lr.fit(dataset)
     assert(model.numClasses === 2)
+    val numFeatures = dataset.select("features").first().getAs[Vector](0).size
+    assert(model.numFeatures === numFeatures)
 
     val threshold = model.getThreshold
     val results = model.transform(dataset)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
index ddc948f65df4..2d1df9b2b82e 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
@@ -21,7 +21,7 @@ import org.apache.spark.SparkFunSuite
 import org.apache.spark.mllib.classification.LogisticRegressionSuite._
 import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
 import org.apache.spark.mllib.evaluation.MulticlassMetrics
-import org.apache.spark.mllib.linalg.Vectors
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.Row
@@ -73,6 +73,8 @@ class MultilayerPerceptronClassifierSuite extends SparkFunSuite with MLlibTestSp
       .setSeed(11L)
       .setMaxIter(numIterations)
     val model = trainer.fit(dataFrame)
+    val numFeatures = dataFrame.select("features").first().getAs[Vector](0).size
+    assert(model.numFeatures === numFeatures)
     val mlpPredictionAndLabels = model.transform(dataFrame).select("prediction", "label")
       .map { case Row(p: Double, l: Double) => (p, l) }
     // train multinomial logistic regression
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
index 8f50cb924e64..fb5f00e0646c 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
@@ -22,6 +22,7 @@ import org.apache.spark.mllib.linalg.{Vector, Vectors}
 
 final class TestProbabilisticClassificationModel(
     override val uid: String,
+    override val numFeatures: Int,
     override val numClasses: Int)
   extends ProbabilisticClassificationModel[Vector, TestProbabilisticClassificationModel] {
 
@@ -45,13 +46,14 @@ class ProbabilisticClassifierSuite extends SparkFunSuite {
 
   test("test thresholding") {
     val thresholds = Array(0.5, 0.2)
-    val testModel = new TestProbabilisticClassificationModel("myuid", 2).setThresholds(thresholds)
+    val testModel = new TestProbabilisticClassificationModel("myuid", 2, 2)
+      .setThresholds(thresholds)
     assert(testModel.friendlyPredict(Vectors.dense(Array(1.0, 1.0))) === 1.0)
     assert(testModel.friendlyPredict(Vectors.dense(Array(1.0, 0.2))) === 0.0)
   }
 
   test("test thresholding not required") {
-    val testModel = new TestProbabilisticClassificationModel("myuid", 2)
+    val testModel = new TestProbabilisticClassificationModel("myuid", 2, 2)
     assert(testModel.friendlyPredict(Vectors.dense(Array(1.0, 2.0))) === 1.0)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/RandomForestClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/RandomForestClassifierSuite.scala
index b4403ec30049..deb8ec771cb2 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/RandomForestClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/RandomForestClassifierSuite.scala
@@ -68,7 +68,7 @@ class RandomForestClassifierSuite extends SparkFunSuite with MLlibTestSparkConte
   test("params") {
     ParamsSuite.checkParams(new RandomForestClassifier)
     val model = new RandomForestClassificationModel("rfc",
-      Array(new DecisionTreeClassificationModel("dtc", new LeafNode(0.0, 0.0, null), 2)), 2, 2)
+      Array(new DecisionTreeClassificationModel("dtc", new LeafNode(0.0, 0.0, null), 1, 2)), 2, 2)
     ParamsSuite.checkParams(model)
   }
 
@@ -209,7 +209,7 @@ class RandomForestClassifierSuite extends SparkFunSuite with MLlibTestSparkConte
   */
 }
 
-private object RandomForestClassifierSuite {
+private object RandomForestClassifierSuite extends SparkFunSuite {
 
   /**
    * Train 2 models on the given dataset, one using the old API and one using the new API.
@@ -220,6 +220,7 @@ private object RandomForestClassifierSuite {
       rf: RandomForestClassifier,
       categoricalFeatures: Map[Int, Int],
       numClasses: Int): Unit = {
+    val numFeatures = data.first().features.size
     val oldStrategy =
       rf.getOldStrategy(categoricalFeatures, numClasses, OldAlgo.Classification, rf.getOldImpurity)
     val oldModel = OldRandomForest.trainClassifier(
@@ -233,6 +234,7 @@ private object RandomForestClassifierSuite {
     TreeTests.checkEqual(oldModelAsNew, newModel)
     assert(newModel.hasParent)
     assert(!newModel.trees.head.asInstanceOf[DecisionTreeClassificationModel].hasParent)
-    assert(newModel.numClasses == numClasses)
+    assert(newModel.numClasses === numClasses)
+    assert(newModel.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
index b092bcd6a7e8..868fb8eecb8b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
@@ -89,6 +89,7 @@ private[ml] object DecisionTreeRegressorSuite extends SparkFunSuite {
       data: RDD[LabeledPoint],
       dt: DecisionTreeRegressor,
       categoricalFeatures: Map[Int, Int]): Unit = {
+    val numFeatures = data.first().features.size
     val oldStrategy = dt.getOldStrategy(categoricalFeatures)
     val oldTree = OldDecisionTree.train(data, oldStrategy)
     val newData: DataFrame = TreeTests.setMetadata(data, categoricalFeatures, numClasses = 0)
@@ -97,5 +98,6 @@ private[ml] object DecisionTreeRegressorSuite extends SparkFunSuite {
     val oldTreeAsNew = DecisionTreeRegressionModel.fromOld(
       oldTree, newTree.parent.asInstanceOf[DecisionTreeRegressor], categoricalFeatures)
     TreeTests.checkEqual(oldTreeAsNew, newTree)
+    assert(newTree.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/GBTRegressorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/GBTRegressorSuite.scala
index a68197b59193..09326600e620 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/GBTRegressorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/GBTRegressorSuite.scala
@@ -156,7 +156,7 @@ class GBTRegressorSuite extends SparkFunSuite with MLlibTestSparkContext {
   */
 }
 
-private object GBTRegressorSuite {
+private object GBTRegressorSuite extends SparkFunSuite {
 
   /**
    * Train 2 models on the given dataset, one using the old API and one using the new API.
@@ -167,6 +167,7 @@ private object GBTRegressorSuite {
       validationData: Option[RDD[LabeledPoint]],
       gbt: GBTRegressor,
       categoricalFeatures: Map[Int, Int]): Unit = {
+    val numFeatures = data.first().features.size
     val oldBoostingStrategy = gbt.getOldBoostingStrategy(categoricalFeatures, OldAlgo.Regression)
     val oldGBT = new OldGBT(oldBoostingStrategy)
     val oldModel = oldGBT.run(data)
@@ -174,7 +175,9 @@ private object GBTRegressorSuite {
     val newModel = gbt.fit(newData)
     // Use parent from newTree since this is not checked anyways.
     val oldModelAsNew = GBTRegressionModel.fromOld(
-      oldModel, newModel.parent.asInstanceOf[GBTRegressor], categoricalFeatures)
+      oldModel, newModel.parent.asInstanceOf[GBTRegressor], categoricalFeatures, numFeatures)
     TreeTests.checkEqual(oldModelAsNew, newModel)
+    assert(newModel.numFeatures === numFeatures)
+    assert(oldModelAsNew.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 8428f4f00b37..7cb9471e6986 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -22,8 +22,8 @@ import scala.util.Random
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
-import org.apache.spark.mllib.linalg.{DenseVector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.mllib.linalg.{Vector, DenseVector, Vectors}
 import org.apache.spark.mllib.util.{LinearDataGenerator, MLlibTestSparkContext}
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row}
@@ -87,6 +87,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(model.getPredictionCol === "prediction")
     assert(model.intercept !== 0.0)
     assert(model.hasParent)
+    val numFeatures = dataset.select("features").first().getAs[Vector](0).size
+    assert(model.numFeatures === numFeatures)
   }
 
   test("linear regression with intercept without regularization") {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/RandomForestRegressorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/RandomForestRegressorSuite.scala
index 7b1b3f11481d..7e751e4b553b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/RandomForestRegressorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/RandomForestRegressorSuite.scala
@@ -137,6 +137,7 @@ private object RandomForestRegressorSuite extends SparkFunSuite {
       data: RDD[LabeledPoint],
       rf: RandomForestRegressor,
       categoricalFeatures: Map[Int, Int]): Unit = {
+    val numFeatures = data.first().features.size
     val oldStrategy =
       rf.getOldStrategy(categoricalFeatures, numClasses = 0, OldAlgo.Regression, rf.getOldImpurity)
     val oldModel = OldRandomForest.trainRegressor(
@@ -147,5 +148,6 @@ private object RandomForestRegressorSuite extends SparkFunSuite {
     val oldModelAsNew = RandomForestRegressionModel.fromOld(
       oldModel, newModel.parent.asInstanceOf[RandomForestRegressor], categoricalFeatures)
     TreeTests.checkEqual(oldModelAsNew, newModel)
+    assert(newModel.numFeatures === numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/tree/impl/RandomForestSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/tree/impl/RandomForestSuite.scala
index dc852795c7f6..d5c238e9ae16 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/tree/impl/RandomForestSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/tree/impl/RandomForestSuite.scala
@@ -77,7 +77,8 @@ class RandomForestSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     // Forest consisting of (full tree) + (internal node with 2 leafs)
     val trees = Array(parent, grandParent).map { root =>
-      new DecisionTreeClassificationModel(root, numClasses = 3).asInstanceOf[DecisionTreeModel]
+      new DecisionTreeClassificationModel(root, numFeatures = 2, numClasses = 3)
+        .asInstanceOf[DecisionTreeModel]
     }
     val importances: Vector = RandomForest.featureImportances(trees, 2)
     val tree2norm = feature0importance + feature1importance

From ce2b056d35c0c75d5c162b93680ee2d84152e911 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 23 Sep 2015 15:26:02 -0700
Subject: [PATCH 087/896] [SPARK-10686] [ML] Add quantilesCol to
 AFTSurvivalRegression

By default ```quantilesCol``` should be empty. If ```quantileProbabilities``` is set, we should append quantiles as a new column (of type Vector).

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8836 from yanboliang/spark-10686.
---
 .../ml/regression/AFTSurvivalRegression.scala | 51 ++++++++++---
 .../AFTSurvivalRegressionSuite.scala          | 74 ++++++++++++-------
 2 files changed, 91 insertions(+), 34 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index 5b25db651f56..717caacad30e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -41,7 +41,7 @@ import org.apache.spark.storage.StorageLevel
  */
 private[regression] trait AFTSurvivalRegressionParams extends Params
   with HasFeaturesCol with HasLabelCol with HasPredictionCol with HasMaxIter
-  with HasTol with HasFitIntercept {
+  with HasTol with HasFitIntercept with Logging {
 
   /**
    * Param for censor column name.
@@ -59,21 +59,35 @@ private[regression] trait AFTSurvivalRegressionParams extends Params
 
   /**
    * Param for quantile probabilities array.
-   * Values of the quantile probabilities array should be in the range [0, 1].
+   * Values of the quantile probabilities array should be in the range [0, 1]
+   * and the array should be non-empty.
    * @group param
    */
   @Since("1.6.0")
   final val quantileProbabilities: DoubleArrayParam = new DoubleArrayParam(this,
     "quantileProbabilities", "quantile probabilities array",
-    (t: Array[Double]) => t.forall(ParamValidators.inRange(0, 1)))
+    (t: Array[Double]) => t.forall(ParamValidators.inRange(0, 1)) && t.length > 0)
 
   /** @group getParam */
   @Since("1.6.0")
   def getQuantileProbabilities: Array[Double] = $(quantileProbabilities)
+  setDefault(quantileProbabilities -> Array(0.01, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.99))
 
-  /** Checks whether the input has quantile probabilities array. */
-  protected[regression] def hasQuantileProbabilities: Boolean = {
-    isDefined(quantileProbabilities) && $(quantileProbabilities).size != 0
+  /**
+   * Param for quantiles column name.
+   * This column will output quantiles of corresponding quantileProbabilities if it is set.
+   * @group param
+   */
+  @Since("1.6.0")
+  final val quantilesCol: Param[String] = new Param(this, "quantilesCol", "quantiles column name")
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getQuantilesCol: String = $(quantilesCol)
+
+  /** Checks whether the input has quantiles column name. */
+  protected[regression] def hasQuantilesCol: Boolean = {
+    isDefined(quantilesCol) && $(quantilesCol) != ""
   }
 
   /**
@@ -90,6 +104,9 @@ private[regression] trait AFTSurvivalRegressionParams extends Params
       SchemaUtils.checkColumnType(schema, $(censorCol), DoubleType)
       SchemaUtils.checkColumnType(schema, $(labelCol), DoubleType)
     }
+    if (hasQuantilesCol) {
+      SchemaUtils.appendColumn(schema, $(quantilesCol), new VectorUDT)
+    }
     SchemaUtils.appendColumn(schema, $(predictionCol), DoubleType)
   }
 }
@@ -124,6 +141,14 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
   @Since("1.6.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
+  /** @group setParam */
+  @Since("1.6.0")
+  def setQuantileProbabilities(value: Array[Double]): this.type = set(quantileProbabilities, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setQuantilesCol(value: String): this.type = set(quantilesCol, value)
+
   /**
    * Set if we should fit the intercept
    * Default is true.
@@ -243,10 +268,12 @@ class AFTSurvivalRegressionModel private[ml] (
   @Since("1.6.0")
   def setQuantileProbabilities(value: Array[Double]): this.type = set(quantileProbabilities, value)
 
+  /** @group setParam */
+  @Since("1.6.0")
+  def setQuantilesCol(value: String): this.type = set(quantilesCol, value)
+
   @Since("1.6.0")
   def predictQuantiles(features: Vector): Vector = {
-    require(hasQuantileProbabilities,
-      "AFTSurvivalRegressionModel predictQuantiles must set quantile probabilities array")
     // scale parameter for the Weibull distribution of lifetime
     val lambda = math.exp(BLAS.dot(coefficients, features) + intercept)
     // shape parameter for the Weibull distribution of lifetime
@@ -266,7 +293,13 @@ class AFTSurvivalRegressionModel private[ml] (
   override def transform(dataset: DataFrame): DataFrame = {
     transformSchema(dataset.schema)
     val predictUDF = udf { features: Vector => predict(features) }
-    dataset.withColumn($(predictionCol), predictUDF(col($(featuresCol))))
+    val predictQuantilesUDF = udf { features: Vector => predictQuantiles(features)}
+    if (hasQuantilesCol) {
+      dataset.withColumn($(predictionCol), predictUDF(col($(featuresCol))))
+        .withColumn($(quantilesCol), predictQuantilesUDF(col($(featuresCol))))
+    } else {
+      dataset.withColumn($(predictionCol), predictUDF(col($(featuresCol))))
+    }
   }
 
   @Since("1.6.0")
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
index ca7140a45ea6..359f31027172 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
@@ -22,8 +22,7 @@ import scala.util.Random
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
-import org.apache.spark.mllib.linalg.{DenseVector, Vectors}
-import org.apache.spark.mllib.linalg.BLAS
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.random.{ExponentialGenerator, WeibullGenerator}
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.mllib.util.MLlibTestSparkContext
@@ -59,16 +58,20 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
     assert(aftr.getFitIntercept)
     assert(aftr.getMaxIter === 100)
     assert(aftr.getTol === 1E-6)
-    val model = aftr.fit(datasetUnivariate)
+    val model = aftr.setQuantileProbabilities(Array(0.1, 0.8))
+      .setQuantilesCol("quantiles")
+      .fit(datasetUnivariate)
 
     // copied model must have the same parent.
     MLTestingUtils.checkCopy(model)
 
     model.transform(datasetUnivariate)
-      .select("label", "prediction")
+      .select("label", "prediction", "quantiles")
       .collect()
     assert(model.getFeaturesCol === "features")
     assert(model.getPredictionCol === "prediction")
+    assert(model.getQuantileProbabilities === Array(0.1, 0.8))
+    assert(model.getQuantilesCol === "quantiles")
     assert(model.intercept !== 0.0)
     assert(model.hasParent)
   }
@@ -108,7 +111,10 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
   }
 
   test("aft survival regression with univariate") {
-    val trainer = new AFTSurvivalRegression
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val trainer = new AFTSurvivalRegression()
+      .setQuantileProbabilities(quantileProbabilities)
+      .setQuantilesCol("quantiles")
     val model = trainer.fit(datasetUnivariate)
 
     /*
@@ -159,23 +165,25 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        [1]  0.1879174  2.6801195 14.5779394
      */
     val features = Vectors.dense(6.559282795753792)
-    val quantileProbabilities = Array(0.1, 0.5, 0.9)
     val responsePredictR = 4.494763
     val quantilePredictR = Vectors.dense(0.1879174, 2.6801195, 14.5779394)
 
     assert(model.predict(features) ~== responsePredictR relTol 1E-3)
-    model.setQuantileProbabilities(quantileProbabilities)
     assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
 
-    model.transform(datasetUnivariate).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    model.transform(datasetUnivariate).select("features", "prediction", "quantiles")
+      .collect().foreach {
+        case Row(features: Vector, prediction: Double, quantiles: Vector) =>
+          assert(prediction ~== model.predict(features) relTol 1E-5)
+          assert(quantiles ~== model.predictQuantiles(features) relTol 1E-5)
     }
   }
 
   test("aft survival regression with multivariate") {
-    val trainer = new AFTSurvivalRegression
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val trainer = new AFTSurvivalRegression()
+      .setQuantileProbabilities(quantileProbabilities)
+      .setQuantilesCol("quantiles")
     val model = trainer.fit(datasetMultivariate)
 
     /*
@@ -227,23 +235,26 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        [1]  0.5287044  3.3285858 10.7517072
      */
     val features = Vectors.dense(2.233396950271428, -2.5321374085997683)
-    val quantileProbabilities = Array(0.1, 0.5, 0.9)
     val responsePredictR = 4.761219
     val quantilePredictR = Vectors.dense(0.5287044, 3.3285858, 10.7517072)
 
     assert(model.predict(features) ~== responsePredictR relTol 1E-3)
-    model.setQuantileProbabilities(quantileProbabilities)
     assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
 
-    model.transform(datasetMultivariate).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    model.transform(datasetMultivariate).select("features", "prediction", "quantiles")
+      .collect().foreach {
+        case Row(features: Vector, prediction: Double, quantiles: Vector) =>
+          assert(prediction ~== model.predict(features) relTol 1E-5)
+          assert(quantiles ~== model.predictQuantiles(features) relTol 1E-5)
     }
   }
 
   test("aft survival regression w/o intercept") {
-    val trainer = new AFTSurvivalRegression().setFitIntercept(false)
+    val quantileProbabilities = Array(0.1, 0.5, 0.9)
+    val trainer = new AFTSurvivalRegression()
+      .setQuantileProbabilities(quantileProbabilities)
+      .setQuantilesCol("quantiles")
+      .setFitIntercept(false)
     val model = trainer.fit(datasetMultivariate)
 
     /*
@@ -294,18 +305,31 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        [1]   1.452103  25.506077 158.428600
      */
     val features = Vectors.dense(2.233396950271428, -2.5321374085997683)
-    val quantileProbabilities = Array(0.1, 0.5, 0.9)
     val responsePredictR = 44.54465
     val quantilePredictR = Vectors.dense(1.452103, 25.506077, 158.428600)
 
     assert(model.predict(features) ~== responsePredictR relTol 1E-3)
-    model.setQuantileProbabilities(quantileProbabilities)
     assert(model.predictQuantiles(features) ~== quantilePredictR relTol 1E-3)
 
-    model.transform(datasetMultivariate).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 = math.exp(BLAS.dot(model.coefficients, features) + model.intercept)
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    model.transform(datasetMultivariate).select("features", "prediction", "quantiles")
+      .collect().foreach {
+        case Row(features: Vector, prediction: Double, quantiles: Vector) =>
+          assert(prediction ~== model.predict(features) relTol 1E-5)
+          assert(quantiles ~== model.predictQuantiles(features) relTol 1E-5)
+    }
+  }
+
+  test("aft survival regression w/o quantiles column") {
+    val trainer = new AFTSurvivalRegression
+    val model = trainer.fit(datasetUnivariate)
+    val outputDf = model.transform(datasetUnivariate)
+
+    assert(outputDf.schema.fieldNames.contains("quantiles") === false)
+
+    outputDf.select("features", "prediction")
+      .collect().foreach {
+        case Row(features: Vector, prediction: Double) =>
+          assert(prediction ~== model.predict(features) relTol 1E-5)
     }
   }
 }

From 067afb4e9bb227f159bcbc2aafafce9693303ea9 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 23 Sep 2015 16:41:42 -0700
Subject: [PATCH 088/896] [SPARK-10699] [ML] Support checkpointInterval can be
 disabled

Currently use can set ```checkpointInterval``` to specify how often should the cache be check-pointed. But we also need the function that users can disable it. This PR supports that users can disable checkpoint if user setting ```checkpointInterval = -1```.
We also add documents for GBT ```cacheNodeIds``` to make users can understand more clearly about checkpoint.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8820 from yanboliang/spark-10699.
---
 .../spark/ml/classification/DecisionTreeClassifier.scala    | 1 -
 .../apache/spark/ml/param/shared/SharedParamsCodeGen.scala  | 6 +++---
 .../org/apache/spark/ml/param/shared/sharedParams.scala     | 4 ++--
 .../main/scala/org/apache/spark/ml/recommendation/ALS.scala | 2 +-
 .../scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala   | 2 +-
 .../main/scala/org/apache/spark/ml/tree/treeParams.scala    | 4 ++--
 6 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
index a6f6d463bffb..b0157f7ce24e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
@@ -19,7 +19,6 @@ package org.apache.spark.ml.classification
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.ml.param.ParamMap
-import org.apache.spark.ml.param.shared.HasCheckpointInterval
 import org.apache.spark.ml.tree.{DecisionTreeModel, DecisionTreeParams, Node, TreeClassifierParams}
 import org.apache.spark.ml.tree.impl.RandomForest
 import org.apache.spark.ml.util.{Identifiable, MetadataUtils}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala b/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
index 8049d51fee5e..8cb6b5493c61 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
@@ -56,9 +56,9 @@ private[shared] object SharedParamsCodeGen {
       ParamDesc[String]("inputCol", "input column name"),
       ParamDesc[Array[String]]("inputCols", "input column names"),
       ParamDesc[String]("outputCol", "output column name", Some("uid + \"__output\"")),
-      ParamDesc[Int]("checkpointInterval", "checkpoint interval (>= 1). E.g. 10 means that " +
-        "the cache will get checkpointed every 10 iterations.",
-        isValid = "ParamValidators.gtEq(1)"),
+      ParamDesc[Int]("checkpointInterval", "set checkpoint interval (>= 1) or " +
+        "disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed " +
+        "every 10 iterations", isValid = "(interval: Int) => interval == -1 || interval >= 1"),
       ParamDesc[Boolean]("fitIntercept", "whether to fit an intercept term", Some("true")),
       ParamDesc[String]("handleInvalid", "how to handle invalid entries. Options are skip (which " +
         "will filter out rows with bad values), or error (which will throw an errror). More " +
diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala b/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
index aff47fc326c4..e3625212e525 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
@@ -223,10 +223,10 @@ private[ml] trait HasOutputCol extends Params {
 private[ml] trait HasCheckpointInterval extends Params {
 
   /**
-   * Param for checkpoint interval (>= 1). E.g. 10 means that the cache will get checkpointed every 10 iterations..
+   * Param for set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations.
    * @group param
    */
-  final val checkpointInterval: IntParam = new IntParam(this, "checkpointInterval", "checkpoint interval (>= 1). E.g. 10 means that the cache will get checkpointed every 10 iterations.", ParamValidators.gtEq(1))
+  final val checkpointInterval: IntParam = new IntParam(this, "checkpointInterval", "set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations", (interval: Int) => interval == -1 || interval >= 1)
 
   /** @group getParam */
   final def getCheckpointInterval: Int = $(checkpointInterval)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index 7db8ad8d2791..9a56a75b69d0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -561,7 +561,7 @@ object ALS extends Logging {
     var itemFactors = initialize(itemInBlocks, rank, seedGen.nextLong())
     var previousCheckpointFile: Option[String] = None
     val shouldCheckpoint: Int => Boolean = (iter) =>
-      sc.checkpointDir.isDefined && (iter % checkpointInterval == 0)
+      sc.checkpointDir.isDefined && checkpointInterval != -1 && (iter % checkpointInterval == 0)
     val deletePreviousCheckpointFile: () => Unit = () =>
       previousCheckpointFile.foreach { file =>
         try {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
index c5ad8df73fac..1ee01131d633 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/NodeIdCache.scala
@@ -122,7 +122,7 @@ private[spark] class NodeIdCache(
     rddUpdateCount += 1
 
     // Handle checkpointing if the directory is not None.
-    if (canCheckpoint && (rddUpdateCount % checkpointInterval) == 0) {
+    if (canCheckpoint && checkpointInterval != -1 && (rddUpdateCount % checkpointInterval) == 0) {
       // Let's see if we can delete previous checkpoints.
       var canDelete = true
       while (checkpointQueue.size > 1 && canDelete) {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
index 42e74ce6d2c6..281ba6eeffa9 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.ml.tree
 
-import org.apache.spark.ml.classification.ClassifierParams
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
@@ -87,7 +86,8 @@ private[ml] trait DecisionTreeParams extends PredictorParams with HasCheckpointI
   /**
    * If false, the algorithm will pass trees to executors to match instances with nodes.
    * If true, the algorithm will cache node IDs for each instance.
-   * Caching can speed up training of deeper trees.
+   * Caching can speed up training of deeper trees. Users can set how often should the
+   * cache be checkpointed or disable it by setting checkpointInterval.
    * (default = false)
    * @group expertParam
    */

From 9952217749118ae78fe794ca11e1c4a87a4ae8ba Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 23 Sep 2015 16:43:21 -0700
Subject: [PATCH 089/896] [SPARK-10731] [SQL] Delegate to Scala's
 DataFrame.take implementation in Python DataFrame.

Python DataFrame.head/take now requires scanning all the partitions. This pull request changes them to delegate the actual implementation to Scala DataFrame (by calling DataFrame.take).

This is more of a hack for fixing this issue in 1.5.1. A more proper fix is to change executeCollect and executeTake to return InternalRow rather than Row, and thus eliminate the extra round-trip conversion.

Author: Reynold Xin <rxin@databricks.com>

Closes #8876 from rxin/SPARK-10731.
---
 .../org/apache/spark/api/python/PythonRDD.scala  |  2 +-
 python/pyspark/sql/dataframe.py                  |  5 ++++-
 .../execution/{pythonUDFs.scala => python.scala} | 14 +++++++++++++-
 .../apache/spark/sql/test/ExamplePointUDT.scala  | 16 +++++++---------
 4 files changed, 25 insertions(+), 12 deletions(-)
 rename sql/core/src/main/scala/org/apache/spark/sql/execution/{pythonUDFs.scala => python.scala} (95%)

diff --git a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
index 19be0939038b..8464b578ed09 100644
--- a/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
@@ -633,7 +633,7 @@ private[spark] object PythonRDD extends Logging {
    *
    * The thread will terminate after all the data are sent or any exceptions happen.
    */
-  private def serveIterator[T](items: Iterator[T], threadName: String): Int = {
+  def serveIterator[T](items: Iterator[T], threadName: String): Int = {
     val serverSocket = new ServerSocket(0, 1, InetAddress.getByName("localhost"))
     // Close the socket if no connection in 3 seconds
     serverSocket.setSoTimeout(3000)
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 80f8d8a0eb37..b09422aadef8 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -300,7 +300,10 @@ def take(self, num):
         >>> df.take(2)
         [Row(age=2, name=u'Alice'), Row(age=5, name=u'Bob')]
         """
-        return self.limit(num).collect()
+        with SCCallSiteSync(self._sc) as css:
+            port = self._sc._jvm.org.apache.spark.sql.execution.EvaluatePython.takeAndServe(
+                self._jdf, num)
+        return list(_load_from_socket(port, BatchedSerializer(PickleSerializer())))
 
     @ignore_unicode_prefix
     @since(1.3)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
similarity index 95%
rename from sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
index c35c726bfc50..d6aaf424a893 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/pythonUDFs.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
@@ -28,7 +28,8 @@ import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.api.python.{PythonRunner, PythonBroadcast, PythonRDD, SerDeUtil}
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.DataFrame
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
@@ -118,6 +119,17 @@ object EvaluatePython {
   def apply(udf: PythonUDF, child: LogicalPlan): EvaluatePython =
     new EvaluatePython(udf, child, AttributeReference("pythonUDF", udf.dataType)())
 
+  def takeAndServe(df: DataFrame, n: Int): Int = {
+    registerPicklers()
+    // This is an annoying hack - we should refactor the code so executeCollect and executeTake
+    // returns InternalRow rather than Row.
+    val converter = CatalystTypeConverters.createToCatalystConverter(df.schema)
+    val iter = new SerDeUtil.AutoBatchedPickler(df.take(n).iterator.map { row =>
+      EvaluatePython.toJava(converter(row).asInstanceOf[InternalRow], df.schema)
+    })
+    PythonRDD.serveIterator(iter, s"serve-DataFrame")
+  }
+
   /**
    * Helper for converting from Catalyst type to java type suitable for Pyrolite.
    */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
index 2fdd798b44bb..963e6030c14c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
@@ -39,22 +39,20 @@ private[sql] class ExamplePointUDT extends UserDefinedType[ExamplePoint] {
 
   override def pyUDT: String = "pyspark.sql.tests.ExamplePointUDT"
 
-  override def serialize(obj: Any): Seq[Double] = {
+  override def serialize(obj: Any): GenericArrayData = {
     obj match {
       case p: ExamplePoint =>
-        Seq(p.x, p.y)
+        val output = new Array[Any](2)
+        output(0) = p.x
+        output(1) = p.y
+        new GenericArrayData(output)
     }
   }
 
   override def deserialize(datum: Any): ExamplePoint = {
     datum match {
-      case values: Seq[_] =>
-        val xy = values.asInstanceOf[Seq[Double]]
-        assert(xy.length == 2)
-        new ExamplePoint(xy(0), xy(1))
-      case values: util.ArrayList[_] =>
-        val xy = values.asInstanceOf[util.ArrayList[Double]].asScala
-        new ExamplePoint(xy(0), xy(1))
+      case values: ArrayData =>
+        new ExamplePoint(values.getDouble(0), values.getDouble(1))
     }
   }
 

From 084e4e126211d74a79e8dbd2d0e604dd3c650822 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Wed, 23 Sep 2015 18:59:49 -0700
Subject: [PATCH 090/896] [SPARK-6028][Core]A new RPC implemetation based on
 the network module

Design doc: https://docs.google.com/document/d/1CF5G6rGVQMKSyV_QKo4D2M-x6rxz5x1Ew7aK3Uq6u8c/edit?usp=sharing

Author: zsxwing <zsxwing@gmail.com>

Closes #6457 from zsxwing/new-rpc.
---
 .../org/apache/spark/MapOutputTracker.scala   |   2 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  20 +-
 .../apache/spark/deploy/worker/Worker.scala   |   2 +-
 .../spark/deploy/worker/WorkerWatcher.scala   |  13 +-
 .../org/apache/spark/rpc/RpcCallContext.scala |   2 +-
 .../org/apache/spark/rpc/RpcEndpoint.scala    |  51 +-
 .../rpc/RpcEndpointNotFoundException.scala    |  22 +
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |   7 +-
 .../apache/spark/rpc/akka/AkkaRpcEnv.scala    |   6 +-
 .../apache/spark/rpc/netty/Dispatcher.scala   | 218 ++++++++
 .../apache/spark/rpc/netty/IDVerifier.scala   |  39 ++
 .../org/apache/spark/rpc/netty/Inbox.scala    | 220 ++++++++
 .../spark/rpc/netty/NettyRpcAddress.scala     |  56 ++
 .../spark/rpc/netty/NettyRpcCallContext.scala |  87 +++
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 504 ++++++++++++++++++
 .../storage/BlockManagerSlaveEndpoint.scala   |   6 +-
 .../org/apache/spark/util/ThreadUtils.scala   |   6 +-
 .../apache/spark/MapOutputTrackerSuite.scala  |  10 +-
 .../org/apache/spark/SSLSampleConfigs.scala   |   2 +
 .../deploy/worker/WorkerWatcherSuite.scala    |   6 +-
 .../org/apache/spark/rpc/RpcEnvSuite.scala    |  78 ++-
 .../apache/spark/rpc/TestRpcEndpoint.scala    | 123 +++++
 .../apache/spark/rpc/netty/InboxSuite.scala   | 148 +++++
 .../rpc/netty/NettyRpcAddressSuite.scala      |  29 +
 .../spark/rpc/netty/NettyRpcEnvSuite.scala    |  38 ++
 .../rpc/netty/NettyRpcHandlerSuite.scala      |  67 +++
 .../spark/network/client/TransportClient.java |   4 +
 .../spark/network/server/RpcHandler.java      |   2 +
 .../server/TransportRequestHandler.java       |   1 +
 .../streaming/scheduler/ReceiverTracker.scala |   2 +-
 .../spark/deploy/yarn/ApplicationMaster.scala |   5 +-
 31 files changed, 1708 insertions(+), 68 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
index 94eb8daa85c5..e380c5b8afcf 100644
--- a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
+++ b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
@@ -45,7 +45,7 @@ private[spark] class MapOutputTrackerMasterEndpoint(
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
     case GetMapOutputStatuses(shuffleId: Int) =>
-      val hostPort = context.sender.address.hostPort
+      val hostPort = context.senderAddress.hostPort
       logInfo("Asked to send map output locations for shuffle " + shuffleId + " to " + hostPort)
       val mapOutputStatuses = tracker.getSerializedMapOutputStatuses(shuffleId)
       val serializedSize = mapOutputStatuses.size
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index c6fef7f91f00..cfde27fb2e7d 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -20,11 +20,10 @@ package org.apache.spark
 import java.io.File
 import java.net.Socket
 
-import akka.actor.ActorSystem
-
 import scala.collection.mutable
 import scala.util.Properties
 
+import akka.actor.ActorSystem
 import com.google.common.collect.MapMaker
 
 import org.apache.spark.annotation.DeveloperApi
@@ -41,7 +40,7 @@ import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.{ShuffleMemoryManager, ShuffleManager}
 import org.apache.spark.storage._
 import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator}
-import org.apache.spark.util.{RpcUtils, Utils}
+import org.apache.spark.util.{AkkaUtils, RpcUtils, Utils}
 
 /**
  * :: DeveloperApi ::
@@ -57,6 +56,7 @@ import org.apache.spark.util.{RpcUtils, Utils}
 class SparkEnv (
     val executorId: String,
     private[spark] val rpcEnv: RpcEnv,
+    _actorSystem: ActorSystem, // TODO Remove actorSystem
     val serializer: Serializer,
     val closureSerializer: Serializer,
     val cacheManager: CacheManager,
@@ -76,7 +76,7 @@ class SparkEnv (
 
   // TODO Remove actorSystem
   @deprecated("Actor system is no longer supported as of 1.4.0", "1.4.0")
-  val actorSystem: ActorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+  val actorSystem: ActorSystem = _actorSystem
 
   private[spark] var isStopped = false
   private val pythonWorkers = mutable.HashMap[(String, Map[String, String]), PythonWorkerFactory]()
@@ -100,6 +100,9 @@ class SparkEnv (
       blockManager.master.stop()
       metricsSystem.stop()
       outputCommitCoordinator.stop()
+      if (!rpcEnv.isInstanceOf[AkkaRpcEnv]) {
+        actorSystem.shutdown()
+      }
       rpcEnv.shutdown()
 
       // Unfortunately Akka's awaitTermination doesn't actually wait for the Netty server to shut
@@ -249,7 +252,13 @@ object SparkEnv extends Logging {
     // Create the ActorSystem for Akka and get the port it binds to.
     val actorSystemName = if (isDriver) driverActorSystemName else executorActorSystemName
     val rpcEnv = RpcEnv.create(actorSystemName, hostname, port, conf, securityManager)
-    val actorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+    val actorSystem: ActorSystem =
+      if (rpcEnv.isInstanceOf[AkkaRpcEnv]) {
+        rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+      } else {
+        // Create a ActorSystem for legacy codes
+        AkkaUtils.createActorSystem(actorSystemName, hostname, port, conf, securityManager)._1
+      }
 
     // Figure out which port Akka actually bound to in case the original port is 0 or occupied.
     if (isDriver) {
@@ -395,6 +404,7 @@ object SparkEnv extends Logging {
     val envInstance = new SparkEnv(
       executorId,
       rpcEnv,
+      actorSystem,
       serializer,
       closureSerializer,
       cacheManager,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
index 770927c80f7a..93a1b3f31042 100755
--- a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
@@ -329,7 +329,7 @@ private[deploy] class Worker(
         registrationRetryTimer = Some(forwordMessageScheduler.scheduleAtFixedRate(
           new Runnable {
             override def run(): Unit = Utils.tryLogNonFatalError {
-              self.send(ReregisterWithMaster)
+              Option(self).foreach(_.send(ReregisterWithMaster))
             }
           },
           INITIAL_REGISTRATION_RETRY_INTERVAL_SECONDS,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
index 735c4f092715..ab56fde938ba 100644
--- a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
@@ -24,14 +24,13 @@ import org.apache.spark.rpc._
  * Actor which connects to a worker process and terminates the JVM if the connection is severed.
  * Provides fate sharing between a worker and its associated child processes.
  */
-private[spark] class WorkerWatcher(override val rpcEnv: RpcEnv, workerUrl: String)
+private[spark] class WorkerWatcher(
+    override val rpcEnv: RpcEnv, workerUrl: String, isTesting: Boolean = false)
   extends RpcEndpoint with Logging {
 
-  override def onStart() {
-    logInfo(s"Connecting to worker $workerUrl")
-    if (!isTesting) {
-      rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
-    }
+  logInfo(s"Connecting to worker $workerUrl")
+  if (!isTesting) {
+    rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
   }
 
   // Used to avoid shutting down JVM during tests
@@ -40,8 +39,6 @@ private[spark] class WorkerWatcher(override val rpcEnv: RpcEnv, workerUrl: Strin
   // true rather than calling `System.exit`. The user can check `isShutDown` to know if
   // `exitNonZero` is called.
   private[deploy] var isShutDown = false
-  private[deploy] def setTesting(testing: Boolean) = isTesting = testing
-  private var isTesting = false
 
   // Lets filter events only from the worker's rpc system
   private val expectedAddress = RpcAddress.fromURIString(workerUrl)
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
index 3e5b64265e91..f527ec86ab7b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
@@ -37,5 +37,5 @@ private[spark] trait RpcCallContext {
   /**
    * The sender of this message.
    */
-  def sender: RpcEndpointRef
+  def senderAddress: RpcAddress
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
index dfcbc51cdf61..f1ddc6d2cd43 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
@@ -28,20 +28,6 @@ private[spark] trait RpcEnvFactory {
   def create(config: RpcEnvConfig): RpcEnv
 }
 
-/**
- * A trait that requires RpcEnv thread-safely sending messages to it.
- *
- * Thread-safety means processing of one message happens before processing of the next message by
- * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
- * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
- * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
- *
- * However, there is no guarantee that the same thread will be executing the same
- * [[ThreadSafeRpcEndpoint]] for different messages.
- */
-private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint
-
-
 /**
  * An end point for the RPC that defines what functions to trigger given a message.
  *
@@ -101,38 +87,39 @@ private[spark] trait RpcEndpoint {
   }
 
   /**
-   * Invoked before [[RpcEndpoint]] starts to handle any message.
+   * Invoked when `remoteAddress` is connected to the current node.
    */
-  def onStart(): Unit = {
+  def onConnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when [[RpcEndpoint]] is stopping.
+   * Invoked when `remoteAddress` is lost.
    */
-  def onStop(): Unit = {
+  def onDisconnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when `remoteAddress` is connected to the current node.
+   * Invoked when some network error happens in the connection between the current node and
+   * `remoteAddress`.
    */
-  def onConnected(remoteAddress: RpcAddress): Unit = {
+  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when `remoteAddress` is lost.
+   * Invoked before [[RpcEndpoint]] starts to handle any message.
    */
-  def onDisconnected(remoteAddress: RpcAddress): Unit = {
+  def onStart(): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when some network error happens in the connection between the current node and
-   * `remoteAddress`.
+   * Invoked when [[RpcEndpoint]] is stopping. `self` will be `null` in this method and you cannot
+   * use it to send or ask messages.
    */
-  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+  def onStop(): Unit = {
     // By default, do nothing.
   }
 
@@ -146,3 +133,17 @@ private[spark] trait RpcEndpoint {
     }
   }
 }
+
+/**
+ * A trait that requires RpcEnv thread-safely sending messages to it.
+ *
+ * Thread-safety means processing of one message happens before processing of the next message by
+ * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
+ * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
+ * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
+ *
+ * However, there is no guarantee that the same thread will be executing the same
+ * [[ThreadSafeRpcEndpoint]] for different messages.
+ */
+private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint {
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
new file mode 100644
index 000000000000..d177881fb305
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc
+
+import org.apache.spark.SparkException
+
+private[rpc] class RpcEndpointNotFoundException(uri: String)
+  extends SparkException(s"Cannot find endpoint: $uri")
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index 29debe808130..afe1ee8a0b4d 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -36,8 +36,11 @@ private[spark] object RpcEnv {
 
   private def getRpcEnvFactory(conf: SparkConf): RpcEnvFactory = {
     // Add more RpcEnv implementations here
-    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory")
-    val rpcEnvName = conf.get("spark.rpc", "akka")
+    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory",
+      "netty" -> "org.apache.spark.rpc.netty.NettyRpcEnvFactory")
+    // Use "netty" by default so that Jenkins can run all tests using NettyRpcEnv.
+    // Will change it back to "akka" before merging the new implementation.
+    val rpcEnvName = conf.get("spark.rpc", "netty")
     val rpcEnvFactoryClassName = rpcEnvNames.getOrElse(rpcEnvName.toLowerCase, rpcEnvName)
     Utils.classForName(rpcEnvFactoryClassName).newInstance().asInstanceOf[RpcEnvFactory]
   }
diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index ad67e1c5ad4d..95132a4e4a0b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -166,9 +166,9 @@ private[spark] class AkkaRpcEnv private[akka] (
             _sender ! AkkaMessage(response, false)
           }
 
-          // Some RpcEndpoints need to know the sender's address
-          override val sender: RpcEndpointRef =
-            new AkkaRpcEndpointRef(defaultAddress, _sender, conf)
+          // Use "lazy" because most of RpcEndpoints don't need "senderAddress"
+          override lazy val senderAddress: RpcAddress =
+            new AkkaRpcEndpointRef(defaultAddress, _sender, conf).address
         })
       } else {
         endpoint.receive
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
new file mode 100644
index 000000000000..d71e6f01dbb2
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -0,0 +1,218 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.concurrent.{ConcurrentHashMap, LinkedBlockingQueue, TimeUnit}
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.JavaConverters._
+import scala.concurrent.Promise
+import scala.util.control.NonFatal
+
+import org.apache.spark.{SparkException, Logging}
+import org.apache.spark.network.client.RpcResponseCallback
+import org.apache.spark.rpc._
+import org.apache.spark.util.ThreadUtils
+
+private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
+
+  private class EndpointData(
+      val name: String,
+      val endpoint: RpcEndpoint,
+      val ref: NettyRpcEndpointRef) {
+    val inbox = new Inbox(ref, endpoint)
+  }
+
+  private val endpoints = new ConcurrentHashMap[String, EndpointData]()
+  private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]()
+
+  // Track the receivers whose inboxes may contain messages.
+  private val receivers = new LinkedBlockingQueue[EndpointData]()
+
+  @GuardedBy("this")
+  private var stopped = false
+
+  def registerRpcEndpoint(name: String, endpoint: RpcEndpoint): NettyRpcEndpointRef = {
+    val addr = new NettyRpcAddress(nettyEnv.address.host, nettyEnv.address.port, name)
+    val endpointRef = new NettyRpcEndpointRef(nettyEnv.conf, addr, nettyEnv)
+    synchronized {
+      if (stopped) {
+        throw new IllegalStateException("RpcEnv has been stopped")
+      }
+      if (endpoints.putIfAbsent(name, new EndpointData(name, endpoint, endpointRef)) != null) {
+        throw new IllegalArgumentException(s"There is already an RpcEndpoint called $name")
+      }
+      val data = endpoints.get(name)
+      endpointRefs.put(data.endpoint, data.ref)
+      receivers.put(data)
+    }
+    endpointRef
+  }
+
+  def getRpcEndpointRef(endpoint: RpcEndpoint): RpcEndpointRef = endpointRefs.get(endpoint)
+
+  def removeRpcEndpointRef(endpoint: RpcEndpoint): Unit = endpointRefs.remove(endpoint)
+
+  // Should be idempotent
+  private def unregisterRpcEndpoint(name: String): Unit = {
+    val data = endpoints.remove(name)
+    if (data != null) {
+      data.inbox.stop()
+      receivers.put(data)
+    }
+    // Don't clean `endpointRefs` here because it's possible that some messages are being processed
+    // now and they can use `getRpcEndpointRef`. So `endpointRefs` will be cleaned in Inbox via
+    // `removeRpcEndpointRef`.
+  }
+
+  def stop(rpcEndpointRef: RpcEndpointRef): Unit = {
+    synchronized {
+      if (stopped) {
+        // This endpoint will be stopped by Dispatcher.stop() method.
+        return
+      }
+      unregisterRpcEndpoint(rpcEndpointRef.name)
+    }
+  }
+
+  /**
+   * Send a message to all registered [[RpcEndpoint]]s.
+   * @param message
+   */
+  def broadcastMessage(message: InboxMessage): Unit = {
+    val iter = endpoints.keySet().iterator()
+    while (iter.hasNext) {
+      val name = iter.next
+      postMessageToInbox(name, (_) => message,
+        () => { logWarning(s"Drop ${message} because ${name} has been stopped") })
+    }
+  }
+
+  def postMessage(message: RequestMessage, callback: RpcResponseCallback): Unit = {
+    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
+      val rpcCallContext =
+        new RemoteNettyRpcCallContext(
+          nettyEnv, sender, callback, message.senderAddress, message.needReply)
+      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
+    }
+
+    def onEndpointStopped(): Unit = {
+      callback.onFailure(
+        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
+    }
+
+    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+  }
+
+  def postMessage(message: RequestMessage, p: Promise[Any]): Unit = {
+    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
+      val rpcCallContext =
+        new LocalNettyRpcCallContext(sender, message.senderAddress, message.needReply, p)
+      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
+    }
+
+    def onEndpointStopped(): Unit = {
+      p.tryFailure(
+        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
+    }
+
+    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+  }
+
+  private def postMessageToInbox(
+      endpointName: String,
+      createMessageFn: NettyRpcEndpointRef => InboxMessage,
+      onStopped: () => Unit): Unit = {
+    val shouldCallOnStop =
+      synchronized {
+        val data = endpoints.get(endpointName)
+        if (stopped || data == null) {
+          true
+        } else {
+          data.inbox.post(createMessageFn(data.ref))
+          receivers.put(data)
+          false
+        }
+      }
+    if (shouldCallOnStop) {
+      // We don't need to call `onStop` in the `synchronized` block
+      onStopped()
+    }
+  }
+
+  private val parallelism = nettyEnv.conf.getInt("spark.rpc.netty.dispatcher.parallelism",
+    Runtime.getRuntime.availableProcessors())
+
+  private val executor = ThreadUtils.newDaemonFixedThreadPool(parallelism, "dispatcher-event-loop")
+
+  (0 until parallelism) foreach { _ =>
+    executor.execute(new MessageLoop)
+  }
+
+  def stop(): Unit = {
+    synchronized {
+      if (stopped) {
+        return
+      }
+      stopped = true
+    }
+    // Stop all endpoints. This will queue all endpoints for processing by the message loops.
+    endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
+    // Enqueue a message that tells the message loops to stop.
+    receivers.put(PoisonEndpoint)
+    executor.shutdown()
+  }
+
+  def awaitTermination(): Unit = {
+    executor.awaitTermination(Long.MaxValue, TimeUnit.MILLISECONDS)
+  }
+
+  /**
+   * Return if the endpoint exists
+   */
+  def verify(name: String): Boolean = {
+    endpoints.containsKey(name)
+  }
+
+  private class MessageLoop extends Runnable {
+    override def run(): Unit = {
+      try {
+        while (true) {
+          try {
+            val data = receivers.take()
+            if (data == PoisonEndpoint) {
+              // Put PoisonEndpoint back so that other MessageLoops can see it.
+              receivers.put(PoisonEndpoint)
+              return
+            }
+            data.inbox.process(Dispatcher.this)
+          } catch {
+            case NonFatal(e) => logError(e.getMessage, e)
+          }
+        }
+      } catch {
+        case ie: InterruptedException => // exit
+      }
+    }
+  }
+
+  /**
+   * A poison endpoint that indicates MessageLoop should exit its loop.
+   */
+  private val PoisonEndpoint = new EndpointData(null, null, null)
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
new file mode 100644
index 000000000000..6061c9b8de94
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.rpc.{RpcCallContext, RpcEndpoint, RpcEnv}
+
+/**
+ * A message used to ask the remote [[IDVerifier]] if an [[RpcEndpoint]] exists
+ */
+private[netty] case class ID(name: String)
+
+/**
+ * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if a [[RpcEndpoint]] exists in this [[RpcEnv]]
+ */
+private[netty] class IDVerifier(
+    override val rpcEnv: RpcEnv, dispatcher: Dispatcher) extends RpcEndpoint {
+
+  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+    case ID(name) => context.reply(dispatcher.verify(name))
+  }
+}
+
+private[netty] object IDVerifier {
+  val NAME = "id-verifier"
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
new file mode 100644
index 000000000000..4803548365ab
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
@@ -0,0 +1,220 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.LinkedList
+import javax.annotation.concurrent.GuardedBy
+
+import scala.util.control.NonFatal
+
+import org.apache.spark.{Logging, SparkException}
+import org.apache.spark.rpc.{RpcAddress, RpcEndpoint, ThreadSafeRpcEndpoint}
+
+private[netty] sealed trait InboxMessage
+
+private[netty] case class ContentMessage(
+    senderAddress: RpcAddress,
+    content: Any,
+    needReply: Boolean,
+    context: NettyRpcCallContext) extends InboxMessage
+
+private[netty] case object OnStart extends InboxMessage
+
+private[netty] case object OnStop extends InboxMessage
+
+/**
+ * A broadcast message that indicates connecting to a remote node.
+ */
+private[netty] case class Associated(remoteAddress: RpcAddress) extends InboxMessage
+
+/**
+ * A broadcast message that indicates a remote connection is lost.
+ */
+private[netty] case class Disassociated(remoteAddress: RpcAddress) extends InboxMessage
+
+/**
+ * A broadcast message that indicates a network error
+ */
+private[netty] case class AssociationError(cause: Throwable, remoteAddress: RpcAddress)
+  extends InboxMessage
+
+/**
+ * A inbox that stores messages for an [[RpcEndpoint]] and posts messages to it thread-safely.
+ * @param endpointRef
+ * @param endpoint
+ */
+private[netty] class Inbox(
+    val endpointRef: NettyRpcEndpointRef,
+    val endpoint: RpcEndpoint) extends Logging {
+
+  @GuardedBy("this")
+  protected val messages = new LinkedList[InboxMessage]()
+
+  @GuardedBy("this")
+  private var stopped = false
+
+  @GuardedBy("this")
+  private var enableConcurrent = false
+
+  @GuardedBy("this")
+  private var workerCount = 0
+
+  // OnStart should be the first message to process
+  synchronized {
+    messages.add(OnStart)
+  }
+
+  /**
+   * Process stored messages.
+   */
+  def process(dispatcher: Dispatcher): Unit = {
+    var message: InboxMessage = null
+    synchronized {
+      if (!enableConcurrent && workerCount != 0) {
+        return
+      }
+      message = messages.poll()
+      if (message != null) {
+        workerCount += 1
+      } else {
+        return
+      }
+    }
+    while (true) {
+      safelyCall(endpoint) {
+        message match {
+          case ContentMessage(_sender, content, needReply, context) =>
+            val pf: PartialFunction[Any, Unit] =
+              if (needReply) {
+                endpoint.receiveAndReply(context)
+              } else {
+                endpoint.receive
+              }
+            try {
+              pf.applyOrElse[Any, Unit](content, { msg =>
+                throw new SparkException(s"Unmatched message $message from ${_sender}")
+              })
+              if (!needReply) {
+                context.finish()
+              }
+            } catch {
+              case NonFatal(e) =>
+                if (needReply) {
+                  // If the sender asks a reply, we should send the error back to the sender
+                  context.sendFailure(e)
+                } else {
+                  context.finish()
+                  throw e
+                }
+            }
+
+          case OnStart => {
+            endpoint.onStart()
+            if (!endpoint.isInstanceOf[ThreadSafeRpcEndpoint]) {
+              synchronized {
+                enableConcurrent = true
+              }
+            }
+          }
+
+          case OnStop =>
+            assert(synchronized { workerCount } == 1)
+            dispatcher.removeRpcEndpointRef(endpoint)
+            endpoint.onStop()
+            assert(isEmpty, "OnStop should be the last message")
+
+          case Associated(remoteAddress) =>
+            endpoint.onConnected(remoteAddress)
+
+          case Disassociated(remoteAddress) =>
+            endpoint.onDisconnected(remoteAddress)
+
+          case AssociationError(cause, remoteAddress) =>
+            endpoint.onNetworkError(cause, remoteAddress)
+        }
+      }
+
+      synchronized {
+        // "enableConcurrent" will be set to false after `onStop` is called, so we should check it
+        // every time.
+        if (!enableConcurrent && workerCount != 1) {
+          // If we are not the only one worker, exit
+          workerCount -= 1
+          return
+        }
+        message = messages.poll()
+        if (message == null) {
+          workerCount -= 1
+          return
+        }
+      }
+    }
+  }
+
+  def post(message: InboxMessage): Unit = {
+    val dropped =
+      synchronized {
+        if (stopped) {
+          // We already put "OnStop" into "messages", so we should drop further messages
+          true
+        } else {
+          messages.add(message)
+          false
+        }
+      }
+    if (dropped) {
+      onDrop(message)
+    }
+  }
+
+  def stop(): Unit = synchronized {
+    // The following codes should be in `synchronized` so that we can make sure "OnStop" is the last
+    // message
+    if (!stopped) {
+      // We should disable concurrent here. Then when RpcEndpoint.onStop is called, it's the only
+      // thread that is processing messages. So `RpcEndpoint.onStop` can release its resources
+      // safely.
+      enableConcurrent = false
+      stopped = true
+      messages.add(OnStop)
+      // Note: The concurrent events in messages will be processed one by one.
+    }
+  }
+
+  // Visible for testing.
+  protected def onDrop(message: InboxMessage): Unit = {
+    logWarning(s"Drop ${message} because $endpointRef is stopped")
+  }
+
+  def isEmpty: Boolean = synchronized { messages.isEmpty }
+
+  private def safelyCall(endpoint: RpcEndpoint)(action: => Unit): Unit = {
+    try {
+      action
+    } catch {
+      case NonFatal(e) => {
+        try {
+          endpoint.onError(e)
+        } catch {
+          case NonFatal(e) => logWarning(s"Ignore error", e)
+        }
+      }
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
new file mode 100644
index 000000000000..1876b2559208
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.net.URI
+
+import org.apache.spark.SparkException
+import org.apache.spark.rpc.RpcAddress
+
+private[netty] case class NettyRpcAddress(host: String, port: Int, name: String) {
+
+  def toRpcAddress: RpcAddress = RpcAddress(host, port)
+
+  override val toString = s"spark://$name@$host:$port"
+}
+
+private[netty] object NettyRpcAddress {
+
+  def apply(sparkUrl: String): NettyRpcAddress = {
+    try {
+      val uri = new URI(sparkUrl)
+      val host = uri.getHost
+      val port = uri.getPort
+      val name = uri.getUserInfo
+      if (uri.getScheme != "spark" ||
+        host == null ||
+        port < 0 ||
+        name == null ||
+        (uri.getPath != null && !uri.getPath.isEmpty) || // uri.getPath returns "" instead of null
+        uri.getFragment != null ||
+        uri.getQuery != null) {
+        throw new SparkException("Invalid Spark URL: " + sparkUrl)
+      }
+      NettyRpcAddress(host, port, name)
+    } catch {
+      case e: java.net.URISyntaxException =>
+        throw new SparkException("Invalid Spark URL: " + sparkUrl, e)
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
new file mode 100644
index 000000000000..75dcc02a0c5a
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import scala.concurrent.Promise
+
+import org.apache.spark.Logging
+import org.apache.spark.network.client.RpcResponseCallback
+import org.apache.spark.rpc.{RpcAddress, RpcCallContext}
+
+private[netty] abstract class NettyRpcCallContext(
+    endpointRef: NettyRpcEndpointRef,
+    override val senderAddress: RpcAddress,
+    needReply: Boolean) extends RpcCallContext with Logging {
+
+  protected def send(message: Any): Unit
+
+  override def reply(response: Any): Unit = {
+    if (needReply) {
+      send(AskResponse(endpointRef, response))
+    } else {
+      throw new IllegalStateException(
+        s"Cannot send $response to the sender because the sender won't handle it")
+    }
+  }
+
+  override def sendFailure(e: Throwable): Unit = {
+    if (needReply) {
+      send(AskResponse(endpointRef, RpcFailure(e)))
+    } else {
+      logError(e.getMessage, e)
+      throw new IllegalStateException(
+        "Cannot send reply to the sender because the sender won't handle it")
+    }
+  }
+
+  def finish(): Unit = {
+    if (!needReply) {
+      send(Ack(endpointRef))
+    }
+  }
+}
+
+/**
+ * If the sender and the receiver are in the same process, the reply can be sent back via `Promise`.
+ */
+private[netty] class LocalNettyRpcCallContext(
+    endpointRef: NettyRpcEndpointRef,
+    senderAddress: RpcAddress,
+    needReply: Boolean,
+    p: Promise[Any]) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+
+  override protected def send(message: Any): Unit = {
+    p.success(message)
+  }
+}
+
+/**
+ * A [[RpcCallContext]] that will call [[RpcResponseCallback]] to send the reply back.
+ */
+private[netty] class RemoteNettyRpcCallContext(
+    nettyEnv: NettyRpcEnv,
+    endpointRef: NettyRpcEndpointRef,
+    callback: RpcResponseCallback,
+    senderAddress: RpcAddress,
+    needReply: Boolean) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+
+  override protected def send(message: Any): Unit = {
+    val reply = nettyEnv.serialize(message)
+    callback.onSuccess(reply)
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
new file mode 100644
index 000000000000..5522b40782d9
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -0,0 +1,504 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc.netty
+
+import java.io._
+import java.net.{InetSocketAddress, URI}
+import java.nio.ByteBuffer
+import java.util.Arrays
+import java.util.concurrent._
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+import scala.concurrent.{Future, Promise}
+import scala.reflect.ClassTag
+import scala.util.{DynamicVariable, Failure, Success}
+import scala.util.control.NonFatal
+
+import org.apache.spark.{Logging, SecurityManager, SparkConf}
+import org.apache.spark.network.TransportContext
+import org.apache.spark.network.client._
+import org.apache.spark.network.netty.SparkTransportConf
+import org.apache.spark.network.sasl.{SaslClientBootstrap, SaslServerBootstrap}
+import org.apache.spark.network.server._
+import org.apache.spark.rpc._
+import org.apache.spark.serializer.{JavaSerializer, JavaSerializerInstance}
+import org.apache.spark.util.{ThreadUtils, Utils}
+
+private[netty] class NettyRpcEnv(
+    val conf: SparkConf,
+    javaSerializerInstance: JavaSerializerInstance,
+    host: String,
+    securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
+
+  private val transportConf =
+    SparkTransportConf.fromSparkConf(conf, conf.getInt("spark.rpc.io.threads", 0))
+
+  private val dispatcher: Dispatcher = new Dispatcher(this)
+
+  private val transportContext =
+    new TransportContext(transportConf, new NettyRpcHandler(dispatcher, this))
+
+  private val clientFactory = {
+    val bootstraps: Seq[TransportClientBootstrap] =
+      if (securityManager.isAuthenticationEnabled()) {
+        Seq(new SaslClientBootstrap(transportConf, "", securityManager,
+          securityManager.isSaslEncryptionEnabled()))
+      } else {
+        Nil
+      }
+    transportContext.createClientFactory(bootstraps.asJava)
+  }
+
+  val timeoutScheduler = ThreadUtils.newDaemonSingleThreadScheduledExecutor("netty-rpc-env-timeout")
+
+  // Because TransportClientFactory.createClient is blocking, we need to run it in this thread pool
+  // to implement non-blocking send/ask.
+  // TODO: a non-blocking TransportClientFactory.createClient in future
+  private val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
+    "netty-rpc-connection",
+    conf.getInt("spark.rpc.connect.threads", 256))
+
+  @volatile private var server: TransportServer = _
+
+  def start(port: Int): Unit = {
+    val bootstraps: Seq[TransportServerBootstrap] =
+      if (securityManager.isAuthenticationEnabled()) {
+        Seq(new SaslServerBootstrap(transportConf, securityManager))
+      } else {
+        Nil
+      }
+    server = transportContext.createServer(port, bootstraps.asJava)
+    dispatcher.registerRpcEndpoint(IDVerifier.NAME, new IDVerifier(this, dispatcher))
+  }
+
+  override lazy val address: RpcAddress = {
+    require(server != null, "NettyRpcEnv has not yet started")
+    RpcAddress(host, server.getPort())
+  }
+
+  override def setupEndpoint(name: String, endpoint: RpcEndpoint): RpcEndpointRef = {
+    dispatcher.registerRpcEndpoint(name, endpoint)
+  }
+
+  def asyncSetupEndpointRefByURI(uri: String): Future[RpcEndpointRef] = {
+    val addr = NettyRpcAddress(uri)
+    val endpointRef = new NettyRpcEndpointRef(conf, addr, this)
+    val idVerifierRef =
+      new NettyRpcEndpointRef(conf, NettyRpcAddress(addr.host, addr.port, IDVerifier.NAME), this)
+    idVerifierRef.ask[Boolean](ID(endpointRef.name)).flatMap { find =>
+      if (find) {
+        Future.successful(endpointRef)
+      } else {
+        Future.failed(new RpcEndpointNotFoundException(uri))
+      }
+    }(ThreadUtils.sameThread)
+  }
+
+  override def stop(endpointRef: RpcEndpointRef): Unit = {
+    require(endpointRef.isInstanceOf[NettyRpcEndpointRef])
+    dispatcher.stop(endpointRef)
+  }
+
+  private[netty] def send(message: RequestMessage): Unit = {
+    val remoteAddr = message.receiver.address
+    if (remoteAddr == address) {
+      val promise = Promise[Any]()
+      dispatcher.postMessage(message, promise)
+      promise.future.onComplete {
+        case Success(response) =>
+          val ack = response.asInstanceOf[Ack]
+          logDebug(s"Receive ack from ${ack.sender}")
+        case Failure(e) =>
+          logError(s"Exception when sending $message", e)
+      }(ThreadUtils.sameThread)
+    } else {
+      try {
+        // `createClient` will block if it cannot find a known connection, so we should run it in
+        // clientConnectionExecutor
+        clientConnectionExecutor.execute(new Runnable {
+          override def run(): Unit = Utils.tryLogNonFatalError {
+            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
+            client.sendRpc(serialize(message), new RpcResponseCallback {
+
+              override def onFailure(e: Throwable): Unit = {
+                logError(s"Exception when sending $message", e)
+              }
+
+              override def onSuccess(response: Array[Byte]): Unit = {
+                val ack = deserialize[Ack](response)
+                logDebug(s"Receive ack from ${ack.sender}")
+              }
+            })
+          }
+        })
+      } catch {
+        case e: RejectedExecutionException => {
+          // `send` after shutting clientConnectionExecutor down, ignore it
+          logWarning(s"Cannot send ${message} because RpcEnv is stopped")
+        }
+      }
+    }
+  }
+
+  private[netty] def ask(message: RequestMessage): Future[Any] = {
+    val promise = Promise[Any]()
+    val remoteAddr = message.receiver.address
+    if (remoteAddr == address) {
+      val p = Promise[Any]()
+      dispatcher.postMessage(message, p)
+      p.future.onComplete {
+        case Success(response) =>
+          val reply = response.asInstanceOf[AskResponse]
+          if (reply.reply.isInstanceOf[RpcFailure]) {
+            if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
+              logWarning(s"Ignore failure: ${reply.reply}")
+            }
+          } else if (!promise.trySuccess(reply.reply)) {
+            logWarning(s"Ignore message: ${reply}")
+          }
+        case Failure(e) =>
+          if (!promise.tryFailure(e)) {
+            logWarning("Ignore Exception", e)
+          }
+      }(ThreadUtils.sameThread)
+    } else {
+      try {
+        // `createClient` will block if it cannot find a known connection, so we should run it in
+        // clientConnectionExecutor
+        clientConnectionExecutor.execute(new Runnable {
+          override def run(): Unit = {
+            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
+            client.sendRpc(serialize(message), new RpcResponseCallback {
+
+              override def onFailure(e: Throwable): Unit = {
+                if (!promise.tryFailure(e)) {
+                  logWarning("Ignore Exception", e)
+                }
+              }
+
+              override def onSuccess(response: Array[Byte]): Unit = {
+                val reply = deserialize[AskResponse](response)
+                if (reply.reply.isInstanceOf[RpcFailure]) {
+                  if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
+                    logWarning(s"Ignore failure: ${reply.reply}")
+                  }
+                } else if (!promise.trySuccess(reply.reply)) {
+                  logWarning(s"Ignore message: ${reply}")
+                }
+              }
+            })
+          }
+        })
+      } catch {
+        case e: RejectedExecutionException => {
+          if (!promise.tryFailure(e)) {
+            logWarning(s"Ignore failure", e)
+          }
+        }
+      }
+    }
+    promise.future
+  }
+
+  private[netty] def serialize(content: Any): Array[Byte] = {
+    val buffer = javaSerializerInstance.serialize(content)
+    Arrays.copyOfRange(
+      buffer.array(), buffer.arrayOffset + buffer.position, buffer.arrayOffset + buffer.limit)
+  }
+
+  private[netty] def deserialize[T: ClassTag](bytes: Array[Byte]): T = {
+    deserialize { () =>
+      javaSerializerInstance.deserialize[T](ByteBuffer.wrap(bytes))
+    }
+  }
+
+  override def endpointRef(endpoint: RpcEndpoint): RpcEndpointRef = {
+    dispatcher.getRpcEndpointRef(endpoint)
+  }
+
+  override def uriOf(systemName: String, address: RpcAddress, endpointName: String): String =
+    new NettyRpcAddress(address.host, address.port, endpointName).toString
+
+  override def shutdown(): Unit = {
+    cleanup()
+  }
+
+  override def awaitTermination(): Unit = {
+    dispatcher.awaitTermination()
+  }
+
+  private def cleanup(): Unit = {
+    if (timeoutScheduler != null) {
+      timeoutScheduler.shutdownNow()
+    }
+    if (server != null) {
+      server.close()
+    }
+    if (clientFactory != null) {
+      clientFactory.close()
+    }
+    if (dispatcher != null) {
+      dispatcher.stop()
+    }
+    if (clientConnectionExecutor != null) {
+      clientConnectionExecutor.shutdownNow()
+    }
+  }
+
+  override def deserialize[T](deserializationAction: () => T): T = {
+    NettyRpcEnv.currentEnv.withValue(this) {
+      deserializationAction()
+    }
+  }
+}
+
+private[netty] object NettyRpcEnv extends Logging {
+
+  /**
+   * When deserializing the [[NettyRpcEndpointRef]], it needs a reference to [[NettyRpcEnv]].
+   * Use `currentEnv` to wrap the deserialization codes. E.g.,
+   *
+   * {{{
+   *   NettyRpcEnv.currentEnv.withValue(this) {
+   *     your deserialization codes
+   *   }
+   * }}}
+   */
+  private[netty] val currentEnv = new DynamicVariable[NettyRpcEnv](null)
+}
+
+private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
+
+  def create(config: RpcEnvConfig): RpcEnv = {
+    val sparkConf = config.conf
+    // Use JavaSerializerInstance in multiple threads is safe. However, if we plan to support
+    // KryoSerializer in future, we have to use ThreadLocal to store SerializerInstance
+    val javaSerializerInstance =
+      new JavaSerializer(sparkConf).newInstance().asInstanceOf[JavaSerializerInstance]
+    val nettyEnv =
+      new NettyRpcEnv(sparkConf, javaSerializerInstance, config.host, config.securityManager)
+    val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
+      nettyEnv.start(actualPort)
+      (nettyEnv, actualPort)
+    }
+    try {
+      Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
+    } catch {
+      case NonFatal(e) =>
+        nettyEnv.shutdown()
+        throw e
+    }
+  }
+}
+
+private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
+  extends RpcEndpointRef(conf) with Serializable with Logging {
+
+  @transient @volatile private var nettyEnv: NettyRpcEnv = _
+
+  @transient @volatile private var _address: NettyRpcAddress = _
+
+  def this(conf: SparkConf, _address: NettyRpcAddress, nettyEnv: NettyRpcEnv) {
+    this(conf)
+    this._address = _address
+    this.nettyEnv = nettyEnv
+  }
+
+  override def address: RpcAddress = _address.toRpcAddress
+
+  private def readObject(in: ObjectInputStream): Unit = {
+    in.defaultReadObject()
+    _address = in.readObject().asInstanceOf[NettyRpcAddress]
+    nettyEnv = NettyRpcEnv.currentEnv.value
+  }
+
+  private def writeObject(out: ObjectOutputStream): Unit = {
+    out.defaultWriteObject()
+    out.writeObject(_address)
+  }
+
+  override def name: String = _address.name
+
+  override def ask[T: ClassTag](message: Any, timeout: RpcTimeout): Future[T] = {
+    val promise = Promise[Any]()
+    val timeoutCancelable = nettyEnv.timeoutScheduler.schedule(new Runnable {
+      override def run(): Unit = {
+        promise.tryFailure(new TimeoutException("Cannot receive any reply in " + timeout.duration))
+      }
+    }, timeout.duration.toNanos, TimeUnit.NANOSECONDS)
+    val f = nettyEnv.ask(RequestMessage(nettyEnv.address, this, message, true))
+    f.onComplete { v =>
+      timeoutCancelable.cancel(true)
+      if (!promise.tryComplete(v)) {
+        logWarning(s"Ignore message $v")
+      }
+    }(ThreadUtils.sameThread)
+    promise.future.mapTo[T].recover(timeout.addMessageIfTimeout)(ThreadUtils.sameThread)
+  }
+
+  override def send(message: Any): Unit = {
+    require(message != null, "Message is null")
+    nettyEnv.send(RequestMessage(nettyEnv.address, this, message, false))
+  }
+
+  override def toString: String = s"NettyRpcEndpointRef(${_address})"
+
+  def toURI: URI = new URI(s"spark://${_address}")
+
+  final override def equals(that: Any): Boolean = that match {
+    case other: NettyRpcEndpointRef => _address == other._address
+    case _ => false
+  }
+
+  final override def hashCode(): Int = if (_address == null) 0 else _address.hashCode()
+}
+
+/**
+ * The message that is sent from the sender to the receiver.
+ */
+private[netty] case class RequestMessage(
+    senderAddress: RpcAddress, receiver: NettyRpcEndpointRef, content: Any, needReply: Boolean)
+
+/**
+ * The base trait for all messages that are sent back from the receiver to the sender.
+ */
+private[netty] trait ResponseMessage
+
+/**
+ * The reply for `ask` from the receiver side.
+ */
+private[netty] case class AskResponse(sender: NettyRpcEndpointRef, reply: Any)
+  extends ResponseMessage
+
+/**
+ * A message to send back to the receiver side. It's necessary because [[TransportClient]] only
+ * clean the resources when it receives a reply.
+ */
+private[netty] case class Ack(sender: NettyRpcEndpointRef) extends ResponseMessage
+
+/**
+ * A response that indicates some failure happens in the receiver side.
+ */
+private[netty] case class RpcFailure(e: Throwable)
+
+/**
+ * Maintain the mapping relations between client addresses and [[RpcEnv]] addresses, broadcast
+ * network events and forward messages to [[Dispatcher]].
+ */
+private[netty] class NettyRpcHandler(
+    dispatcher: Dispatcher, nettyEnv: NettyRpcEnv) extends RpcHandler with Logging {
+
+  private type ClientAddress = RpcAddress
+  private type RemoteEnvAddress = RpcAddress
+
+  // Store all client addresses and their NettyRpcEnv addresses.
+  @GuardedBy("this")
+  private val remoteAddresses = new mutable.HashMap[ClientAddress, RemoteEnvAddress]()
+
+  // Store the connections from other NettyRpcEnv addresses. We need to keep track of the connection
+  // count because `TransportClientFactory.createClient` will create multiple connections
+  // (at most `spark.shuffle.io.numConnectionsPerPeer` connections) and randomly select a connection
+  // to send the message. See `TransportClientFactory.createClient` for more details.
+  @GuardedBy("this")
+  private val remoteConnectionCount = new mutable.HashMap[RemoteEnvAddress, Int]()
+
+  override def receive(
+      client: TransportClient, message: Array[Byte], callback: RpcResponseCallback): Unit = {
+    val requestMessage = nettyEnv.deserialize[RequestMessage](message)
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    assert(addr != null)
+    val remoteEnvAddress = requestMessage.senderAddress
+    val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+    val broadcastMessage =
+      synchronized {
+        // If the first connection to a remote RpcEnv is found, we should broadcast "Associated"
+        if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
+          // clientAddr connects at the first time
+          val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
+          // Increase the connection number of remoteEnvAddress
+          remoteConnectionCount.put(remoteEnvAddress, count + 1)
+          if (count == 0) {
+            // This is the first connection, so fire "Associated"
+            Some(Associated(remoteEnvAddress))
+          } else {
+            None
+          }
+        } else {
+          None
+        }
+      }
+    broadcastMessage.foreach(dispatcher.broadcastMessage)
+    dispatcher.postMessage(requestMessage, callback)
+  }
+
+  override def getStreamManager: StreamManager = new OneForOneStreamManager
+
+  override def exceptionCaught(cause: Throwable, client: TransportClient): Unit = {
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    if (addr != null) {
+      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      val broadcastMessage =
+        synchronized {
+          remoteAddresses.get(clientAddr).map(AssociationError(cause, _))
+        }
+      if (broadcastMessage.isEmpty) {
+        logError(cause.getMessage, cause)
+      } else {
+        dispatcher.broadcastMessage(broadcastMessage.get)
+      }
+    } else {
+      // If the channel is closed before connecting, its remoteAddress will be null.
+      // See java.net.Socket.getRemoteSocketAddress
+      // Because we cannot get a RpcAddress, just log it
+      logError("Exception before connecting to the client", cause)
+    }
+  }
+
+  override def connectionTerminated(client: TransportClient): Unit = {
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    if (addr != null) {
+      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      val broadcastMessage =
+        synchronized {
+          // If the last connection to a remote RpcEnv is terminated, we should broadcast
+          // "Disassociated"
+          remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
+            remoteAddresses -= clientAddr
+            val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
+            assert(count != 0, "remoteAddresses and remoteConnectionCount are not consistent")
+            if (count - 1 == 0) {
+              // We lost all clients, so clean up and fire "Disassociated"
+              remoteConnectionCount.remove(remoteEnvAddress)
+              Some(Disassociated(remoteEnvAddress))
+            } else {
+              // Decrease the connection number of remoteEnvAddress
+              remoteConnectionCount.put(remoteEnvAddress, count - 1)
+              None
+            }
+          }
+        }
+      broadcastMessage.foreach(dispatcher.broadcastMessage)
+    } else {
+      // If the channel is closed before connecting, its remoteAddress will be null. In this case,
+      // we can ignore it since we don't fire "Associated".
+      // See java.net.Socket.getRemoteSocketAddress
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
index 7478ab0fc2f7..e749631bf6f1 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
@@ -19,7 +19,7 @@ package org.apache.spark.storage
 
 import scala.concurrent.{ExecutionContext, Future}
 
-import org.apache.spark.rpc.{RpcEnv, RpcCallContext, RpcEndpoint}
+import org.apache.spark.rpc.{ThreadSafeRpcEndpoint, RpcEnv, RpcCallContext, RpcEndpoint}
 import org.apache.spark.util.ThreadUtils
 import org.apache.spark.{Logging, MapOutputTracker, SparkEnv}
 import org.apache.spark.storage.BlockManagerMessages._
@@ -33,7 +33,7 @@ class BlockManagerSlaveEndpoint(
     override val rpcEnv: RpcEnv,
     blockManager: BlockManager,
     mapOutputTracker: MapOutputTracker)
-  extends RpcEndpoint with Logging {
+  extends ThreadSafeRpcEndpoint with Logging {
 
   private val asyncThreadPool =
     ThreadUtils.newDaemonCachedThreadPool("block-manager-slave-async-thread-pool")
@@ -80,7 +80,7 @@ class BlockManagerSlaveEndpoint(
     future.onSuccess { case response =>
       logDebug("Done " + actionMessage + ", response is " + response)
       context.reply(response)
-      logDebug("Sent response: " + response + " to " + context.sender)
+      logDebug("Sent response: " + response + " to " + context.senderAddress)
     }
     future.onFailure { case t: Throwable =>
       logError("Error in " + actionMessage, t)
diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index 22e291a2b48d..1ed098379e29 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -85,7 +85,11 @@ private[spark] object ThreadUtils {
    */
   def newDaemonSingleThreadScheduledExecutor(threadName: String): ScheduledExecutorService = {
     val threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat(threadName).build()
-    Executors.newSingleThreadScheduledExecutor(threadFactory)
+    val executor = new ScheduledThreadPoolExecutor(1, threadFactory)
+    // By default, a cancelled task is not automatically removed from the work queue until its delay
+    // elapses. We have to enable it manually.
+    executor.setRemoveOnCancelPolicy(true)
+    executor
   }
 
   /**
diff --git a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
index af4e68950f75..7e70308bb360 100644
--- a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
@@ -168,10 +168,9 @@ class MapOutputTrackerSuite extends SparkFunSuite {
     masterTracker.registerShuffle(10, 1)
     masterTracker.registerMapOutput(10, 0, MapStatus(
       BlockManagerId("88", "mph", 1000), Array.fill[Long](10)(0)))
-    val sender = mock(classOf[RpcEndpointRef])
-    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
+    val senderAddress = RpcAddress("localhost", 12345)
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.sender).thenReturn(sender)
+    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(10))
     verify(rpcCallContext).reply(any())
     verify(rpcCallContext, never()).sendFailure(any())
@@ -198,10 +197,9 @@ class MapOutputTrackerSuite extends SparkFunSuite {
       masterTracker.registerMapOutput(20, i, new CompressedMapStatus(
         BlockManagerId("999", "mps", 1000), Array.fill[Long](4000000)(0)))
     }
-    val sender = mock(classOf[RpcEndpointRef])
-    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
+    val senderAddress = RpcAddress("localhost", 12345)
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.sender).thenReturn(sender)
+    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(20))
     verify(rpcCallContext, never()).reply(any())
     verify(rpcCallContext).sendFailure(isA(classOf[SparkException]))
diff --git a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
index 33270bec6247..2d14249855c9 100644
--- a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
+++ b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
@@ -41,6 +41,7 @@ object SSLSampleConfigs {
 
   def sparkSSLConfig(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
+    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", keyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
@@ -54,6 +55,7 @@ object SSLSampleConfigs {
 
   def sparkSSLConfigUntrusted(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
+    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", untrustedKeyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
diff --git a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
index e9034e39a715..40c24bdecc6c 100644
--- a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
@@ -26,8 +26,7 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val conf = new SparkConf()
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
-    workerWatcher.setTesting(testing = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(RpcAddress("1.2.3.4", 1234))
     assert(workerWatcher.isShutDown)
@@ -39,8 +38,7 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
     val otherRpcAddress = RpcAddress("4.3.2.1", 1234)
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
-    workerWatcher.setTesting(testing = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(otherRpcAddress)
     assert(!workerWatcher.isShutDown)
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 6ceafe433774..e836946a5943 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.rpc
 
+import java.io.NotSerializableException
 import java.util.concurrent.{TimeUnit, CountDownLatch, TimeoutException}
 
 import scala.collection.mutable
@@ -99,7 +100,6 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     }
     val rpcEndpointRef = env.setupEndpoint("send-ref", endpoint)
-
     val newRpcEndpointRef = rpcEndpointRef.askWithRetry[RpcEndpointRef]("Hello")
     val reply = newRpcEndpointRef.askWithRetry[String]("Echo")
     assert("Echo" === reply)
@@ -516,6 +516,9 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       assert(events === List(
         ("onConnected", remoteAddress),
         ("onNetworkError", remoteAddress),
+        ("onDisconnected", remoteAddress)) ||
+        events === List(
+        ("onConnected", remoteAddress),
         ("onDisconnected", remoteAddress)))
     }
   }
@@ -535,15 +538,84 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       "local", env.address, "sendWithReply-unserializable-error")
     try {
       val f = rpcEndpointRef.ask[String]("hello")
-      intercept[TimeoutException] {
+      val e = intercept[Exception] {
         Await.result(f, 1 seconds)
       }
+      assert(e.isInstanceOf[TimeoutException] || // For Akka
+        e.isInstanceOf[NotSerializableException] // For Netty
+      )
     } finally {
       anotherEnv.shutdown()
       anotherEnv.awaitTermination()
     }
   }
 
+  test("port conflict") {
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", env.address.port)
+    assert(anotherEnv.address.port != env.address.port)
+  }
+
+  test("send with authentication") {
+    val conf = new SparkConf
+    conf.set("spark.authenticate", "true")
+    conf.set("spark.authenticate.secret", "good")
+
+    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+
+    try {
+      @volatile var message: String = null
+      localEnv.setupEndpoint("send-authentication", new RpcEndpoint {
+        override val rpcEnv = localEnv
+
+        override def receive: PartialFunction[Any, Unit] = {
+          case msg: String => message = msg
+        }
+      })
+      val rpcEndpointRef =
+        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "send-authentication")
+      rpcEndpointRef.send("hello")
+      eventually(timeout(5 seconds), interval(10 millis)) {
+        assert("hello" === message)
+      }
+    } finally {
+      localEnv.shutdown()
+      localEnv.awaitTermination()
+      remoteEnv.shutdown()
+      remoteEnv.awaitTermination()
+    }
+  }
+
+  test("ask with authentication") {
+    val conf = new SparkConf
+    conf.set("spark.authenticate", "true")
+    conf.set("spark.authenticate.secret", "good")
+
+    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+
+    try {
+      localEnv.setupEndpoint("ask-authentication", new RpcEndpoint {
+        override val rpcEnv = localEnv
+
+        override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+          case msg: String => {
+            context.reply(msg)
+          }
+        }
+      })
+      val rpcEndpointRef =
+        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "ask-authentication")
+      val reply = rpcEndpointRef.askWithRetry[String]("hello")
+      assert("hello" === reply)
+    } finally {
+      localEnv.shutdown()
+      localEnv.awaitTermination()
+      remoteEnv.shutdown()
+      remoteEnv.awaitTermination()
+    }
+  }
+
   test("construct RpcTimeout with conf property") {
     val conf = new SparkConf
 
@@ -612,7 +684,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     // once the future is complete to verify addMessageIfTimeout was invoked
     val reply3 =
       intercept[RpcTimeoutException] {
-        Await.result(fut3, 200 millis)
+        Await.result(fut3, 2000 millis)
       }.getMessage
 
     // When the future timed out, the recover callback should have used
diff --git a/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala b/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
new file mode 100644
index 000000000000..5e8da3e205ab
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.scalactic.TripleEquals
+
+class TestRpcEndpoint extends ThreadSafeRpcEndpoint with TripleEquals {
+
+  override val rpcEnv: RpcEnv = null
+
+  @volatile private var receiveMessages = ArrayBuffer[Any]()
+
+  @volatile private var receiveAndReplyMessages = ArrayBuffer[Any]()
+
+  @volatile private var onConnectedMessages = ArrayBuffer[RpcAddress]()
+
+  @volatile private var onDisconnectedMessages = ArrayBuffer[RpcAddress]()
+
+  @volatile private var onNetworkErrorMessages = ArrayBuffer[(Throwable, RpcAddress)]()
+
+  @volatile private var started = false
+
+  @volatile private var stopped = false
+
+  override def receive: PartialFunction[Any, Unit] = {
+    case message: Any => receiveMessages += message
+  }
+
+  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+    case message: Any => receiveAndReplyMessages += message
+  }
+
+  override def onConnected(remoteAddress: RpcAddress): Unit = {
+    onConnectedMessages += remoteAddress
+  }
+
+  /**
+   * Invoked when some network error happens in the connection between the current node and
+   * `remoteAddress`.
+   */
+  override def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+    onNetworkErrorMessages += cause -> remoteAddress
+  }
+
+  override def onDisconnected(remoteAddress: RpcAddress): Unit = {
+    onDisconnectedMessages += remoteAddress
+  }
+
+  def numReceiveMessages: Int = receiveMessages.size
+
+  override def onStart(): Unit = {
+    started = true
+  }
+
+  override def onStop(): Unit = {
+    stopped = true
+  }
+
+  def verifyStarted(): Unit = {
+    assert(started, "RpcEndpoint is not started")
+  }
+
+  def verifyStopped(): Unit = {
+    assert(stopped, "RpcEndpoint is not stopped")
+  }
+
+  def verifyReceiveMessages(expected: Seq[Any]): Unit = {
+    assert(receiveMessages === expected)
+  }
+
+  def verifySingleReceiveMessage(message: Any): Unit = {
+    verifyReceiveMessages(List(message))
+  }
+
+  def verifyReceiveAndReplyMessages(expected: Seq[Any]): Unit = {
+    assert(receiveAndReplyMessages === expected)
+  }
+
+  def verifySingleReceiveAndReplyMessage(message: Any): Unit = {
+    verifyReceiveAndReplyMessages(List(message))
+  }
+
+  def verifySingleOnConnectedMessage(remoteAddress: RpcAddress): Unit = {
+    verifyOnConnectedMessages(List(remoteAddress))
+  }
+
+  def verifyOnConnectedMessages(expected: Seq[RpcAddress]): Unit = {
+    assert(onConnectedMessages === expected)
+  }
+
+  def verifySingleOnDisconnectedMessage(remoteAddress: RpcAddress): Unit = {
+    verifyOnDisconnectedMessages(List(remoteAddress))
+  }
+
+  def verifyOnDisconnectedMessages(expected: Seq[RpcAddress]): Unit = {
+    assert(onDisconnectedMessages === expected)
+  }
+
+  def verifySingleOnNetworkErrorMessage(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+    verifyOnNetworkErrorMessages(List(cause -> remoteAddress))
+  }
+
+  def verifyOnNetworkErrorMessages(expected: Seq[(Throwable, RpcAddress)]): Unit = {
+    assert(onNetworkErrorMessages === expected)
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
new file mode 100644
index 000000000000..ff83ab9b32cb
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
@@ -0,0 +1,148 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.concurrent.{CountDownLatch, TimeUnit}
+import java.util.concurrent.atomic.AtomicInteger
+
+import org.mockito.Mockito._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.rpc.{RpcEnv, RpcEndpoint, RpcAddress, TestRpcEndpoint}
+
+class InboxSuite extends SparkFunSuite {
+
+  test("post") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    when(endpointRef.name).thenReturn("hello")
+
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    val message = ContentMessage(null, "hi", false, null)
+    inbox.post(message)
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    endpoint.verifySingleReceiveMessage("hi")
+
+    inbox.stop()
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+    endpoint.verifyStarted()
+    endpoint.verifyStopped()
+  }
+
+  test("post: with reply") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    val message = ContentMessage(null, "hi", true, null)
+    inbox.post(message)
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    endpoint.verifySingleReceiveAndReplyMessage("hi")
+  }
+
+  test("post: multiple threads") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    when(endpointRef.name).thenReturn("hello")
+
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val numDroppedMessages = new AtomicInteger(0)
+    val inbox = new Inbox(endpointRef, endpoint) {
+      override def onDrop(message: InboxMessage): Unit = {
+        numDroppedMessages.incrementAndGet()
+      }
+    }
+
+    val exitLatch = new CountDownLatch(10)
+
+    for (_ <- 0 until 10) {
+      new Thread {
+        override def run(): Unit = {
+          for (_ <- 0 until 100) {
+            val message = ContentMessage(null, "hi", false, null)
+            inbox.post(message)
+          }
+          exitLatch.countDown()
+        }
+      }.start()
+    }
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+    inbox.stop()
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    exitLatch.await(30, TimeUnit.SECONDS)
+
+    assert(1000 === endpoint.numReceiveMessages + numDroppedMessages.get)
+    endpoint.verifyStarted()
+    endpoint.verifyStopped()
+  }
+
+  test("post: Associated") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(Associated(remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnConnectedMessage(remoteAddress)
+  }
+
+  test("post: Disassociated") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(Disassociated(remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnDisconnectedMessage(remoteAddress)
+  }
+
+  test("post: AssociationError") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+    val cause = new RuntimeException("Oops")
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(AssociationError(cause, remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnNetworkErrorMessage(cause, remoteAddress)
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
new file mode 100644
index 000000000000..a5d43d3704e3
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.SparkFunSuite
+
+class NettyRpcAddressSuite extends SparkFunSuite {
+
+  test("toString") {
+    val addr = NettyRpcAddress("localhost", 12345, "test")
+    assert(addr.toString === "spark://test@localhost:12345")
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
new file mode 100644
index 000000000000..be19668e17c0
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.{SecurityManager, SparkConf}
+import org.apache.spark.rpc._
+
+class NettyRpcEnvSuite extends RpcEnvSuite {
+
+  override def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv = {
+    val config = RpcEnvConfig(conf, "test", "localhost", port, new SecurityManager(conf))
+    new NettyRpcEnvFactory().create(config)
+  }
+
+  test("non-existent endpoint") {
+    val uri = env.uriOf("test", env.address, "nonexist-endpoint")
+    val e = intercept[RpcEndpointNotFoundException] {
+      env.setupEndpointRef("test", env.address, "nonexist-endpoint")
+    }
+    assert(e.getMessage.contains(uri))
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
new file mode 100644
index 000000000000..06ca035d199e
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.net.InetSocketAddress
+
+import io.netty.channel.Channel
+import org.mockito.Mockito._
+import org.mockito.Matchers._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.network.client.{TransportResponseHandler, TransportClient}
+import org.apache.spark.rpc._
+
+class NettyRpcHandlerSuite extends SparkFunSuite {
+
+  val env = mock(classOf[NettyRpcEnv])
+  when(env.deserialize(any(classOf[Array[Byte]]))(any())).
+    thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
+
+  test("receive") {
+    val dispatcher = mock(classOf[Dispatcher])
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+
+    val channel = mock(classOf[Channel])
+    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.receive(client, null, null)
+
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40001))
+    nettyRpcHandler.receive(client, null, null)
+
+    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
+  }
+
+  test("connectionTerminated") {
+    val dispatcher = mock(classOf[Dispatcher])
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+
+    val channel = mock(classOf[Channel])
+    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.receive(client, null, null)
+
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.connectionTerminated(client)
+
+    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).broadcastMessage(Disassociated(RpcAddress("localhost", 12345)))
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
index df841288a02e..fbb8bb6b2f6c 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
@@ -78,6 +78,10 @@ public TransportClient(Channel channel, TransportResponseHandler handler) {
     this.handler = Preconditions.checkNotNull(handler);
   }
 
+  public Channel getChannel() {
+    return channel;
+  }
+
   public boolean isActive() {
     return channel.isOpen() || channel.isActive();
   }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
index 2ba92a40f8b0..dbb7f95f55bc 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
@@ -52,4 +52,6 @@ public abstract void receive(
    * No further requests will come from this client.
    */
   public void connectionTerminated(TransportClient client) { }
+
+  public void exceptionCaught(Throwable cause, TransportClient client) { }
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
index df6027805838..96941d26be19 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
@@ -71,6 +71,7 @@ public TransportRequestHandler(
 
   @Override
   public void exceptionCaught(Throwable cause) {
+    rpcHandler.exceptionCaught(cause, reverseClient);
   }
 
   @Override
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index 204e6142fd6c..d053e9e84910 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -474,7 +474,7 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       // Remote messages
       case RegisterReceiver(streamId, typ, hostPort, receiverEndpoint) =>
         val successful =
-          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.sender.address)
+          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.senderAddress)
         context.reply(successful)
       case AddBlock(receivedBlockInfo) =>
         context.reply(addBlock(receivedBlockInfo))
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 93621b44c918..32d218169a6e 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -556,10 +556,7 @@ private[spark] class ApplicationMaster(
       override val rpcEnv: RpcEnv, driver: RpcEndpointRef, isClusterMode: Boolean)
     extends RpcEndpoint with Logging {
 
-    override def onStart(): Unit = {
-      driver.send(RegisterClusterManager(self))
-
-    }
+    driver.send(RegisterClusterManager(self))
 
     override def receive: PartialFunction[Any, Unit] = {
       case x: AddWebUIFilter =>

From 83f6f54d12a418f5158ee7ee985b54eef8cc1cf0 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Wed, 23 Sep 2015 19:34:31 -0700
Subject: [PATCH 091/896] [SPARK-10474] [SQL] Aggregation fails to allocate
 memory for pointer array (round 2)

This patch reverts most of the changes in a previous fix #8827.

The real cause of the issue is that in `TungstenAggregate`'s prepare method we only reserve 1 page, but later when we switch to sort-based aggregation we try to acquire 1 page AND a pointer array. The longer-term fix should be to reserve also the pointer array, but for now ***we will simply not track the pointer array***. (Note that elsewhere we already don't track the pointer array, e.g. [here](https://github.com/apache/spark/blob/a18208047f06a4244703c17023bb20cbe1f59d73/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java#L88))

Note: This patch reuses the unit test added in #8827 so it doesn't show up in the diff.

Author: Andrew Or <andrew@databricks.com>

Closes #8888 from andrewor14/dont-track-pointer-array.
---
 .../unsafe/sort/UnsafeExternalSorter.java     | 51 +++++--------------
 .../sql/execution/UnsafeKVExternalSorter.java |  9 +---
 .../UnsafeFixedWidthAggregationMapSuite.scala |  8 +--
 3 files changed, 16 insertions(+), 52 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index 14b6aafdea7d..0a311d2d935a 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -159,16 +159,15 @@ public BoxedUnit apply() {
   /**
    * Allocates new sort data structures. Called when creating the sorter and after each spill.
    */
-  public void initializeForWriting() throws IOException {
+  private void initializeForWriting() throws IOException {
+    // Note: Do not track memory for the pointer array for now because of SPARK-10474.
+    // In more detail, in TungstenAggregate we only reserve a page, but when we fall back to
+    // sort-based aggregation we try to acquire a page AND a pointer array, which inevitably
+    // fails if all other memory is already occupied. It should be safe to not track the array
+    // because its memory footprint is frequently much smaller than that of a page. This is a
+    // temporary hack that we should address in 1.6.0.
+    // TODO: track the pointer array memory!
     this.writeMetrics = new ShuffleWriteMetrics();
-    final long pointerArrayMemory =
-      UnsafeInMemorySorter.getMemoryRequirementsForPointerArray(initialSize);
-    final long memoryAcquired = shuffleMemoryManager.tryToAcquire(pointerArrayMemory);
-    if (memoryAcquired != pointerArrayMemory) {
-      shuffleMemoryManager.release(memoryAcquired);
-      throw new IOException("Could not acquire " + pointerArrayMemory + " bytes of memory");
-    }
-
     this.inMemSorter =
       new UnsafeInMemorySorter(taskMemoryManager, recordComparator, prefixComparator, initialSize);
     this.isInMemSorterExternal = false;
@@ -187,14 +186,6 @@ public void closeCurrentPage() {
    * Sort and spill the current records in response to memory pressure.
    */
   public void spill() throws IOException {
-    spill(true);
-  }
-
-  /**
-   * Sort and spill the current records in response to memory pressure.
-   * @param shouldInitializeForWriting whether to allocate memory for writing after the spill
-   */
-  public void spill(boolean shouldInitializeForWriting) throws IOException {
     assert(inMemSorter != null);
     logger.info("Thread {} spilling sort data of {} to disk ({} {} so far)",
       Thread.currentThread().getId(),
@@ -225,9 +216,7 @@ public void spill(boolean shouldInitializeForWriting) throws IOException {
     // written to disk. This also counts the space needed to store the sorter's pointer array.
     taskContext.taskMetrics().incMemoryBytesSpilled(spillSize);
 
-    if (shouldInitializeForWriting) {
-      initializeForWriting();
-    }
+    initializeForWriting();
   }
 
   /**
@@ -275,14 +264,7 @@ private long freeMemory() {
       shuffleMemoryManager.release(block.size());
       memoryFreed += block.size();
     }
-    if (inMemSorter != null) {
-      if (!isInMemSorterExternal) {
-        long sorterMemoryUsage = inMemSorter.getMemoryUsage();
-        memoryFreed += sorterMemoryUsage;
-        shuffleMemoryManager.release(sorterMemoryUsage);
-      }
-      inMemSorter = null;
-    }
+    // TODO: track in-memory sorter memory usage (SPARK-10474)
     allocatedPages.clear();
     currentPage = null;
     currentPagePosition = -1;
@@ -320,17 +302,8 @@ public void cleanupResources() {
   private void growPointerArrayIfNecessary() throws IOException {
     assert(inMemSorter != null);
     if (!inMemSorter.hasSpaceForAnotherRecord()) {
-      logger.debug("Attempting to expand sort pointer array");
-      final long oldPointerArrayMemoryUsage = inMemSorter.getMemoryUsage();
-      final long memoryToGrowPointerArray = oldPointerArrayMemoryUsage * 2;
-      final long memoryAcquired = shuffleMemoryManager.tryToAcquire(memoryToGrowPointerArray);
-      if (memoryAcquired < memoryToGrowPointerArray) {
-        shuffleMemoryManager.release(memoryAcquired);
-        spill();
-      } else {
-        inMemSorter.expandPointerArray();
-        shuffleMemoryManager.release(oldPointerArrayMemoryUsage);
-      }
+      // TODO: track the pointer array memory! (SPARK-10474)
+      inMemSorter.expandPointerArray();
     }
   }
 
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index b81f67a16b81..9df5780e4fd8 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -85,7 +85,7 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
       // We will use the number of elements in the map as the initialSize of the
       // UnsafeInMemorySorter. Because UnsafeInMemorySorter does not accept 0 as the initialSize,
       // we will use 1 as its initial size if the map is empty.
-      // TODO: track pointer array memory used by this in-memory sorter!
+      // TODO: track pointer array memory used by this in-memory sorter! (SPARK-10474)
       final UnsafeInMemorySorter inMemSorter = new UnsafeInMemorySorter(
         taskMemoryManager, recordComparator, prefixComparator, Math.max(1, map.numElements()));
 
@@ -124,13 +124,8 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
         pageSizeBytes,
         inMemSorter);
 
-      // Note: This spill doesn't actually release any memory, so if we try to allocate a new
-      // pointer array immediately after the spill then we may fail to acquire sufficient space
-      // for it (SPARK-10474). For this reason, we must initialize for writing explicitly *after*
-      // we have actually freed memory from our map.
-      sorter.spill(false /* initialize for writing */);
+      sorter.spill();
       map.free();
-      sorter.initializeForWriting();
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
index ada4d42f991c..1739798a24e0 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
@@ -200,9 +200,7 @@ class UnsafeFixedWidthAggregationMapSuite
     val sorter = map.destructAndCreateExternalSorter()
 
     withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      // 4096 * 16 is the initial size allocated for the pointer/prefix array in the in-mem sorter.
-      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() ===
-        initialMemoryConsumption + 4096 * 16)
+      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
     }
 
     // Add more keys to the sorter and make sure the results come out sorted.
@@ -305,9 +303,7 @@ class UnsafeFixedWidthAggregationMapSuite
     val sorter = map.destructAndCreateExternalSorter()
 
     withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      // 4096 * 16 is the initial size allocated for the pointer/prefix array in the in-mem sorter.
-      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() ===
-        initialMemoryConsumption + 4096 * 16)
+      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
     }
 
     // Add more keys to the sorter and make sure the results come out sorted.

From 758c9d25e92417f8c06328c3af7ea2ef0212c79f Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Wed, 23 Sep 2015 19:52:02 -0700
Subject: [PATCH 092/896] [SPARK-10692] [STREAMING] Expose failureReasons in
 BatchInfo for streaming UI to clear failed batches

Slightly modified version of #8818, all credit goes to zsxwing

Author: zsxwing <zsxwing@gmail.com>
Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #8892 from tdas/SPARK-10692.
---
 .../spark/streaming/scheduler/BatchInfo.scala | 10 +++
 .../streaming/scheduler/JobScheduler.scala    | 26 +++----
 .../spark/streaming/scheduler/JobSet.scala    | 19 ++++-
 .../streaming/StreamingListenerSuite.scala    | 76 +++++++++++++++++++
 4 files changed, 115 insertions(+), 16 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
index 9922b6bc1201..3c869561ef8b 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
@@ -39,6 +39,8 @@ case class BatchInfo(
     processingEndTime: Option[Long]
   ) {
 
+  private var _failureReasons: Map[Int, String] = Map.empty
+
   @deprecated("Use streamIdToInputInfo instead", "1.5.0")
   def streamIdToNumRecords: Map[Int, Long] = streamIdToInputInfo.mapValues(_.numRecords)
 
@@ -67,4 +69,12 @@ case class BatchInfo(
    * The number of recorders received by the receivers in this batch.
    */
   def numRecords: Long = streamIdToInputInfo.values.map(_.numRecords).sum
+
+  /** Set the failure reasons corresponding to every output ops in the batch */
+  private[streaming] def setFailureReason(reasons: Map[Int, String]): Unit = {
+    _failureReasons = reasons
+  }
+
+  /** Failure reasons corresponding to every output ops in the batch */
+  private[streaming] def failureReasons = _failureReasons
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
index 32d995dc42f2..66afbf1b1176 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
@@ -166,22 +166,22 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
   }
 
   private def handleJobCompletion(job: Job) {
+    val jobSet = jobSets.get(job.time)
+    jobSet.handleJobCompletion(job)
+    logInfo("Finished job " + job.id + " from job set of time " + jobSet.time)
+    if (jobSet.hasCompleted) {
+      jobSets.remove(jobSet.time)
+      jobGenerator.onBatchCompletion(jobSet.time)
+      logInfo("Total delay: %.3f s for time %s (execution: %.3f s)".format(
+        jobSet.totalDelay / 1000.0, jobSet.time.toString,
+        jobSet.processingDelay / 1000.0
+      ))
+      listenerBus.post(StreamingListenerBatchCompleted(jobSet.toBatchInfo))
+    }
     job.result match {
-      case Success(_) =>
-        val jobSet = jobSets.get(job.time)
-        jobSet.handleJobCompletion(job)
-        logInfo("Finished job " + job.id + " from job set of time " + jobSet.time)
-        if (jobSet.hasCompleted) {
-          jobSets.remove(jobSet.time)
-          jobGenerator.onBatchCompletion(jobSet.time)
-          logInfo("Total delay: %.3f s for time %s (execution: %.3f s)".format(
-            jobSet.totalDelay / 1000.0, jobSet.time.toString,
-            jobSet.processingDelay / 1000.0
-          ))
-          listenerBus.post(StreamingListenerBatchCompleted(jobSet.toBatchInfo))
-        }
       case Failure(e) =>
         reportError("Error running job " + job, e)
+      case _ =>
     }
   }
 
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
index 95833efc9417..255ccf053668 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
@@ -18,8 +18,10 @@
 package org.apache.spark.streaming.scheduler
 
 import scala.collection.mutable.HashSet
+import scala.util.Failure
 
 import org.apache.spark.streaming.Time
+import org.apache.spark.util.Utils
 
 /** Class representing a set of Jobs
   * belong to the same batch.
@@ -62,12 +64,23 @@ case class JobSet(
   }
 
   def toBatchInfo: BatchInfo = {
-    new BatchInfo(
+    val failureReasons: Map[Int, String] = {
+      if (hasCompleted) {
+        jobs.filter(_.result.isFailure).map { job =>
+          (job.outputOpId, Utils.exceptionString(job.result.asInstanceOf[Failure[_]].exception))
+        }.toMap
+      } else {
+        Map.empty
+      }
+    }
+    val binfo = new BatchInfo(
       time,
       streamIdToInputInfo,
       submissionTime,
-      if (processingStartTime >= 0 ) Some(processingStartTime) else None,
-      if (processingEndTime >= 0 ) Some(processingEndTime) else None
+      if (processingStartTime >= 0) Some(processingStartTime) else None,
+      if (processingEndTime >= 0) Some(processingEndTime) else None
     )
+    binfo.setFailureReason(failureReasons)
+    binfo
   }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
index d840c349bbbc..d8fd2ced3bf3 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
@@ -140,6 +140,69 @@ class StreamingListenerSuite extends TestSuiteBase with Matchers {
     }
   }
 
+  test("onBatchCompleted with successful batch") {
+    ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
+    val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
+    inputStream.foreachRDD(_.count)
+
+    val failureReasons = startStreamingContextAndCollectFailureReasons(ssc)
+    assert(failureReasons != null && failureReasons.isEmpty,
+      "A successful batch should not set errorMessage")
+  }
+
+  test("onBatchCompleted with failed batch and one failed job") {
+    ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
+    val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
+    inputStream.foreachRDD { _ =>
+      throw new RuntimeException("This is a failed job")
+    }
+
+    // Check if failureReasons contains the correct error message
+    val failureReasons = startStreamingContextAndCollectFailureReasons(ssc, isFailed = true)
+    assert(failureReasons != null)
+    assert(failureReasons.size === 1)
+    assert(failureReasons.contains(0))
+    assert(failureReasons(0).contains("This is a failed job"))
+  }
+
+  test("onBatchCompleted with failed batch and multiple failed jobs") {
+    ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
+    val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
+    inputStream.foreachRDD { _ =>
+      throw new RuntimeException("This is a failed job")
+    }
+    inputStream.foreachRDD { _ =>
+      throw new RuntimeException("This is another failed job")
+    }
+
+    // Check if failureReasons contains the correct error messages
+    val failureReasons =
+      startStreamingContextAndCollectFailureReasons(ssc, isFailed = true)
+    assert(failureReasons != null)
+    assert(failureReasons.size === 2)
+    assert(failureReasons.contains(0))
+    assert(failureReasons.contains(1))
+    assert(failureReasons(0).contains("This is a failed job"))
+    assert(failureReasons(1).contains("This is another failed job"))
+  }
+
+  private def startStreamingContextAndCollectFailureReasons(
+      _ssc: StreamingContext, isFailed: Boolean = false): Map[Int, String] = {
+    val failureReasonsCollector = new FailureReasonsCollector()
+    _ssc.addStreamingListener(failureReasonsCollector)
+    val batchCounter = new BatchCounter(_ssc)
+    _ssc.start()
+    // Make sure running at least one batch
+    batchCounter.waitUntilBatchesCompleted(expectedNumCompletedBatches = 1, timeout = 10000)
+    if (isFailed) {
+      intercept[RuntimeException] {
+        _ssc.awaitTerminationOrTimeout(10000)
+      }
+    }
+    _ssc.stop()
+    failureReasonsCollector.failureReasons
+  }
+
   /** Check if a sequence of numbers is in increasing order */
   def isInIncreasingOrder(seq: Seq[Long]): Boolean = {
     for (i <- 1 until seq.size) {
@@ -205,3 +268,16 @@ class StreamingListenerSuiteReceiver extends Receiver[Any](StorageLevel.MEMORY_O
   }
   def onStop() { }
 }
+
+/**
+ * A StreamingListener that saves the latest `failureReasons` in `BatchInfo` to the `failureReasons`
+ * field.
+ */
+class FailureReasonsCollector extends StreamingListener {
+
+  @volatile var failureReasons: Map[Int, String] = null
+
+  override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted): Unit = {
+    failureReasons = batchCompleted.batchInfo.failureReasons
+  }
+}

From d91967e159f416924bbd7f0db25156588d4bd7b1 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Wed, 23 Sep 2015 22:49:08 -0700
Subject: [PATCH 093/896] [SPARK-10763] [ML] [JAVA] [TEST] Update Java MLLIB/ML
 tests to use simplified dataframe construction

As introduced in https://issues.apache.org/jira/browse/SPARK-10630 we now have an easier way to create dataframes from local Java lists. Lets update the tests to use those.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8886 from holdenk/SPARK-10763-update-java-mllib-ml-tests-to-use-simplified-dataframe-construction.
---
 .../ml/classification/JavaNaiveBayesSuite.java     |  8 ++++----
 .../spark/ml/feature/JavaBucketizerSuite.java      | 14 +++++++-------
 .../org/apache/spark/ml/feature/JavaDCTSuite.java  | 11 +++++------
 .../spark/ml/feature/JavaHashingTFSuite.java       |  7 ++++---
 .../ml/feature/JavaPolynomialExpansionSuite.java   |  5 +++--
 .../ml/feature/JavaStopWordsRemoverSuite.java      |  7 ++++---
 .../spark/ml/feature/JavaStringIndexerSuite.java   |  7 ++++---
 .../spark/ml/feature/JavaVectorAssemblerSuite.java |  3 +--
 .../spark/ml/feature/JavaVectorSlicerSuite.java    |  7 ++++---
 .../apache/spark/ml/feature/JavaWord2VecSuite.java | 12 ++++++------
 10 files changed, 42 insertions(+), 39 deletions(-)

diff --git a/mllib/src/test/java/org/apache/spark/ml/classification/JavaNaiveBayesSuite.java b/mllib/src/test/java/org/apache/spark/ml/classification/JavaNaiveBayesSuite.java
index 075a62c493f1..f5f690eabd12 100644
--- a/mllib/src/test/java/org/apache/spark/ml/classification/JavaNaiveBayesSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/classification/JavaNaiveBayesSuite.java
@@ -19,6 +19,7 @@
 
 import java.io.Serializable;
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Before;
@@ -75,21 +76,20 @@ public void naiveBayesDefaultParams() {
 
   @Test
   public void testNaiveBayes() {
-    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+    List<Row> data = Arrays.asList(
       RowFactory.create(0.0, Vectors.dense(1.0, 0.0, 0.0)),
       RowFactory.create(0.0, Vectors.dense(2.0, 0.0, 0.0)),
       RowFactory.create(1.0, Vectors.dense(0.0, 1.0, 0.0)),
       RowFactory.create(1.0, Vectors.dense(0.0, 2.0, 0.0)),
       RowFactory.create(2.0, Vectors.dense(0.0, 0.0, 1.0)),
-      RowFactory.create(2.0, Vectors.dense(0.0, 0.0, 2.0))
-    ));
+      RowFactory.create(2.0, Vectors.dense(0.0, 0.0, 2.0)));
 
     StructType schema = new StructType(new StructField[]{
       new StructField("label", DataTypes.DoubleType, false, Metadata.empty()),
       new StructField("features", new VectorUDT(), false, Metadata.empty())
     });
 
-    DataFrame dataset = jsql.createDataFrame(jrdd, schema);
+    DataFrame dataset = jsql.createDataFrame(data, schema);
     NaiveBayes nb = new NaiveBayes().setSmoothing(0.5).setModelType("multinomial");
     NaiveBayesModel model = nb.fit(dataset);
 
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaBucketizerSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaBucketizerSuite.java
index 47d68de599da..8a1e5ef01565 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaBucketizerSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaBucketizerSuite.java
@@ -55,16 +55,16 @@ public void tearDown() {
   public void bucketizerTest() {
     double[] splits = {-0.5, 0.0, 0.5};
 
-    JavaRDD<Row> data = jsc.parallelize(Arrays.asList(
-      RowFactory.create(-0.5),
-      RowFactory.create(-0.3),
-      RowFactory.create(0.0),
-      RowFactory.create(0.2)
-    ));
     StructType schema = new StructType(new StructField[] {
       new StructField("feature", DataTypes.DoubleType, false, Metadata.empty())
     });
-    DataFrame dataset = jsql.createDataFrame(data, schema);
+    DataFrame dataset = jsql.createDataFrame(
+      Arrays.asList(
+        RowFactory.create(-0.5),
+        RowFactory.create(-0.3),
+        RowFactory.create(0.0),
+        RowFactory.create(0.2)),
+      schema);
 
     Bucketizer bucketizer = new Bucketizer()
       .setInputCol("feature")
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaDCTSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaDCTSuite.java
index 0f6ec64d97d3..39da47381b12 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaDCTSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaDCTSuite.java
@@ -57,12 +57,11 @@ public void tearDown() {
   @Test
   public void javaCompatibilityTest() {
     double[] input = new double[] {1D, 2D, 3D, 4D};
-    JavaRDD<Row> data = jsc.parallelize(Arrays.asList(
-      RowFactory.create(Vectors.dense(input))
-    ));
-    DataFrame dataset = jsql.createDataFrame(data, new StructType(new StructField[]{
-      new StructField("vec", (new VectorUDT()), false, Metadata.empty())
-    }));
+    DataFrame dataset = jsql.createDataFrame(
+      Arrays.asList(RowFactory.create(Vectors.dense(input))),
+      new StructType(new StructField[]{
+        new StructField("vec", (new VectorUDT()), false, Metadata.empty())
+      }));
 
     double[] expectedResult = input.clone();
     (new DoubleDCT_1D(input.length)).forward(expectedResult, true);
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaHashingTFSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaHashingTFSuite.java
index 03dd5369bddf..d12332c2a02a 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaHashingTFSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaHashingTFSuite.java
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature;
 
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Assert;
@@ -55,17 +56,17 @@ public void tearDown() {
 
   @Test
   public void hashingTF() {
-    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+    List<Row> data = Arrays.asList(
       RowFactory.create(0.0, "Hi I heard about Spark"),
       RowFactory.create(0.0, "I wish Java could use case classes"),
       RowFactory.create(1.0, "Logistic regression models are neat")
-    ));
+    );
     StructType schema = new StructType(new StructField[]{
       new StructField("label", DataTypes.DoubleType, false, Metadata.empty()),
       new StructField("sentence", DataTypes.StringType, false, Metadata.empty())
     });
 
-    DataFrame sentenceData = jsql.createDataFrame(jrdd, schema);
+    DataFrame sentenceData = jsql.createDataFrame(data, schema);
     Tokenizer tokenizer = new Tokenizer()
       .setInputCol("sentence")
       .setOutputCol("words");
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaPolynomialExpansionSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaPolynomialExpansionSuite.java
index 834fedbb59e1..bf8eefd71905 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaPolynomialExpansionSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaPolynomialExpansionSuite.java
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature;
 
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Assert;
@@ -60,7 +61,7 @@ public void polynomialExpansionTest() {
       .setOutputCol("polyFeatures")
       .setDegree(3);
 
-    JavaRDD<Row> data = jsc.parallelize(Arrays.asList(
+    List<Row> data = Arrays.asList(
       RowFactory.create(
         Vectors.dense(-2.0, 2.3),
         Vectors.dense(-2.0, 4.0, -8.0, 2.3, -4.6, 9.2, 5.29, -10.58, 12.17)
@@ -70,7 +71,7 @@ public void polynomialExpansionTest() {
         Vectors.dense(0.6, -1.1),
         Vectors.dense(0.6, 0.36, 0.216, -1.1, -0.66, -0.396, 1.21, 0.726, -1.331)
       )
-    ));
+    );
 
     StructType schema = new StructType(new StructField[] {
       new StructField("features", new VectorUDT(), false, Metadata.empty()),
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaStopWordsRemoverSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaStopWordsRemoverSuite.java
index 76cdd0fae84a..848d9f8aa928 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaStopWordsRemoverSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaStopWordsRemoverSuite.java
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature;
 
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Before;
@@ -58,14 +59,14 @@ public void javaCompatibilityTest() {
       .setInputCol("raw")
       .setOutputCol("filtered");
 
-    JavaRDD<Row> rdd = jsc.parallelize(Arrays.asList(
+    List<Row> data = Arrays.asList(
       RowFactory.create(Arrays.asList("I", "saw", "the", "red", "baloon")),
       RowFactory.create(Arrays.asList("Mary", "had", "a", "little", "lamb"))
-    ));
+    );
     StructType schema = new StructType(new StructField[] {
       new StructField("raw", DataTypes.createArrayType(DataTypes.StringType), false, Metadata.empty())
     });
-    DataFrame dataset = jsql.createDataFrame(rdd, schema);
+    DataFrame dataset = jsql.createDataFrame(data, schema);
 
     remover.transform(dataset).collect();
   }
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaStringIndexerSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaStringIndexerSuite.java
index 35b18c5308f6..6b2c48ef1c34 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaStringIndexerSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaStringIndexerSuite.java
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature;
 
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Assert;
@@ -56,9 +57,9 @@ public void testStringIndexer() {
       createStructField("id", IntegerType, false),
       createStructField("label", StringType, false)
     });
-    JavaRDD<Row> rdd = jsc.parallelize(
-      Arrays.asList(c(0, "a"), c(1, "b"), c(2, "c"), c(3, "a"), c(4, "a"), c(5, "c")));
-    DataFrame dataset = sqlContext.createDataFrame(rdd, schema);
+    List<Row> data = Arrays.asList(
+      c(0, "a"), c(1, "b"), c(2, "c"), c(3, "a"), c(4, "a"), c(5, "c"));
+    DataFrame dataset = sqlContext.createDataFrame(data, schema);
 
     StringIndexer indexer = new StringIndexer()
       .setInputCol("label")
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorAssemblerSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorAssemblerSuite.java
index b7c564caad3b..e28377757093 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorAssemblerSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorAssemblerSuite.java
@@ -65,8 +65,7 @@ public void testVectorAssembler() {
     Row row = RowFactory.create(
       0, 0.0, Vectors.dense(1.0, 2.0), "a",
       Vectors.sparse(2, new int[] {1}, new double[] {3.0}), 10L);
-    JavaRDD<Row> rdd = jsc.parallelize(Arrays.asList(row));
-    DataFrame dataset = sqlContext.createDataFrame(rdd, schema);
+    DataFrame dataset = sqlContext.createDataFrame(Arrays.asList(row), schema);
     VectorAssembler assembler = new VectorAssembler()
       .setInputCols(new String[] {"x", "y", "z", "n"})
       .setOutputCol("features");
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorSlicerSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorSlicerSuite.java
index f95336142758..00174e6a683d 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorSlicerSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaVectorSlicerSuite.java
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature;
 
 import java.util.Arrays;
+import java.util.List;
 
 import org.junit.After;
 import org.junit.Assert;
@@ -63,12 +64,12 @@ public void vectorSlice() {
     };
     AttributeGroup group = new AttributeGroup("userFeatures", attrs);
 
-    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+    List<Row> data = Arrays.asList(
       RowFactory.create(Vectors.sparse(3, new int[]{0, 1}, new double[]{-2.0, 2.3})),
       RowFactory.create(Vectors.dense(-2.0, 2.3, 0.0))
-    ));
+    );
 
-    DataFrame dataset = jsql.createDataFrame(jrdd, (new StructType()).add(group.toStructField()));
+    DataFrame dataset = jsql.createDataFrame(data, (new StructType()).add(group.toStructField()));
 
     VectorSlicer vectorSlicer = new VectorSlicer()
       .setInputCol("userFeatures").setOutputCol("features");
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaWord2VecSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaWord2VecSuite.java
index 70f5ad943221..0c0c1c4d12d0 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaWord2VecSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaWord2VecSuite.java
@@ -51,15 +51,15 @@ public void tearDown() {
 
   @Test
   public void testJavaWord2Vec() {
-    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
-      RowFactory.create(Arrays.asList("Hi I heard about Spark".split(" "))),
-      RowFactory.create(Arrays.asList("I wish Java could use case classes".split(" "))),
-      RowFactory.create(Arrays.asList("Logistic regression models are neat".split(" ")))
-    ));
     StructType schema = new StructType(new StructField[]{
       new StructField("text", new ArrayType(DataTypes.StringType, true), false, Metadata.empty())
     });
-    DataFrame documentDF = sqlContext.createDataFrame(jrdd, schema);
+    DataFrame documentDF = sqlContext.createDataFrame(
+      Arrays.asList(
+        RowFactory.create(Arrays.asList("Hi I heard about Spark".split(" "))),
+        RowFactory.create(Arrays.asList("I wish Java could use case classes".split(" "))),
+        RowFactory.create(Arrays.asList("Logistic regression models are neat".split(" ")))),
+      schema);
 
     Word2Vec word2Vec = new Word2Vec()
       .setInputCol("text")

From 02144d6745ec0a6d8877d969feb82139bd22437f Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Thu, 24 Sep 2015 08:25:44 -0700
Subject: [PATCH 094/896] Revert "[SPARK-6028][Core]A new RPC implemetation
 based on the network module"

This reverts commit 084e4e126211d74a79e8dbd2d0e604dd3c650822.
---
 .../org/apache/spark/MapOutputTracker.scala   |   2 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  20 +-
 .../apache/spark/deploy/worker/Worker.scala   |   2 +-
 .../spark/deploy/worker/WorkerWatcher.scala   |  13 +-
 .../org/apache/spark/rpc/RpcCallContext.scala |   2 +-
 .../org/apache/spark/rpc/RpcEndpoint.scala    |  51 +-
 .../rpc/RpcEndpointNotFoundException.scala    |  22 -
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |   7 +-
 .../apache/spark/rpc/akka/AkkaRpcEnv.scala    |   6 +-
 .../apache/spark/rpc/netty/Dispatcher.scala   | 218 --------
 .../apache/spark/rpc/netty/IDVerifier.scala   |  39 --
 .../org/apache/spark/rpc/netty/Inbox.scala    | 220 --------
 .../spark/rpc/netty/NettyRpcAddress.scala     |  56 --
 .../spark/rpc/netty/NettyRpcCallContext.scala |  87 ---
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 504 ------------------
 .../storage/BlockManagerSlaveEndpoint.scala   |   6 +-
 .../org/apache/spark/util/ThreadUtils.scala   |   6 +-
 .../apache/spark/MapOutputTrackerSuite.scala  |  10 +-
 .../org/apache/spark/SSLSampleConfigs.scala   |   2 -
 .../deploy/worker/WorkerWatcherSuite.scala    |   6 +-
 .../org/apache/spark/rpc/RpcEnvSuite.scala    |  78 +--
 .../apache/spark/rpc/TestRpcEndpoint.scala    | 123 -----
 .../apache/spark/rpc/netty/InboxSuite.scala   | 148 -----
 .../rpc/netty/NettyRpcAddressSuite.scala      |  29 -
 .../spark/rpc/netty/NettyRpcEnvSuite.scala    |  38 --
 .../rpc/netty/NettyRpcHandlerSuite.scala      |  67 ---
 .../spark/network/client/TransportClient.java |   4 -
 .../spark/network/server/RpcHandler.java      |   2 -
 .../server/TransportRequestHandler.java       |   1 -
 .../streaming/scheduler/ReceiverTracker.scala |   2 +-
 .../spark/deploy/yarn/ApplicationMaster.scala |   5 +-
 31 files changed, 68 insertions(+), 1708 deletions(-)
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
index e380c5b8afcf..94eb8daa85c5 100644
--- a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
+++ b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
@@ -45,7 +45,7 @@ private[spark] class MapOutputTrackerMasterEndpoint(
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
     case GetMapOutputStatuses(shuffleId: Int) =>
-      val hostPort = context.senderAddress.hostPort
+      val hostPort = context.sender.address.hostPort
       logInfo("Asked to send map output locations for shuffle " + shuffleId + " to " + hostPort)
       val mapOutputStatuses = tracker.getSerializedMapOutputStatuses(shuffleId)
       val serializedSize = mapOutputStatuses.size
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index cfde27fb2e7d..c6fef7f91f00 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -20,10 +20,11 @@ package org.apache.spark
 import java.io.File
 import java.net.Socket
 
+import akka.actor.ActorSystem
+
 import scala.collection.mutable
 import scala.util.Properties
 
-import akka.actor.ActorSystem
 import com.google.common.collect.MapMaker
 
 import org.apache.spark.annotation.DeveloperApi
@@ -40,7 +41,7 @@ import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.{ShuffleMemoryManager, ShuffleManager}
 import org.apache.spark.storage._
 import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator}
-import org.apache.spark.util.{AkkaUtils, RpcUtils, Utils}
+import org.apache.spark.util.{RpcUtils, Utils}
 
 /**
  * :: DeveloperApi ::
@@ -56,7 +57,6 @@ import org.apache.spark.util.{AkkaUtils, RpcUtils, Utils}
 class SparkEnv (
     val executorId: String,
     private[spark] val rpcEnv: RpcEnv,
-    _actorSystem: ActorSystem, // TODO Remove actorSystem
     val serializer: Serializer,
     val closureSerializer: Serializer,
     val cacheManager: CacheManager,
@@ -76,7 +76,7 @@ class SparkEnv (
 
   // TODO Remove actorSystem
   @deprecated("Actor system is no longer supported as of 1.4.0", "1.4.0")
-  val actorSystem: ActorSystem = _actorSystem
+  val actorSystem: ActorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
 
   private[spark] var isStopped = false
   private val pythonWorkers = mutable.HashMap[(String, Map[String, String]), PythonWorkerFactory]()
@@ -100,9 +100,6 @@ class SparkEnv (
       blockManager.master.stop()
       metricsSystem.stop()
       outputCommitCoordinator.stop()
-      if (!rpcEnv.isInstanceOf[AkkaRpcEnv]) {
-        actorSystem.shutdown()
-      }
       rpcEnv.shutdown()
 
       // Unfortunately Akka's awaitTermination doesn't actually wait for the Netty server to shut
@@ -252,13 +249,7 @@ object SparkEnv extends Logging {
     // Create the ActorSystem for Akka and get the port it binds to.
     val actorSystemName = if (isDriver) driverActorSystemName else executorActorSystemName
     val rpcEnv = RpcEnv.create(actorSystemName, hostname, port, conf, securityManager)
-    val actorSystem: ActorSystem =
-      if (rpcEnv.isInstanceOf[AkkaRpcEnv]) {
-        rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
-      } else {
-        // Create a ActorSystem for legacy codes
-        AkkaUtils.createActorSystem(actorSystemName, hostname, port, conf, securityManager)._1
-      }
+    val actorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
 
     // Figure out which port Akka actually bound to in case the original port is 0 or occupied.
     if (isDriver) {
@@ -404,7 +395,6 @@ object SparkEnv extends Logging {
     val envInstance = new SparkEnv(
       executorId,
       rpcEnv,
-      actorSystem,
       serializer,
       closureSerializer,
       cacheManager,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
index 93a1b3f31042..770927c80f7a 100755
--- a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
@@ -329,7 +329,7 @@ private[deploy] class Worker(
         registrationRetryTimer = Some(forwordMessageScheduler.scheduleAtFixedRate(
           new Runnable {
             override def run(): Unit = Utils.tryLogNonFatalError {
-              Option(self).foreach(_.send(ReregisterWithMaster))
+              self.send(ReregisterWithMaster)
             }
           },
           INITIAL_REGISTRATION_RETRY_INTERVAL_SECONDS,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
index ab56fde938ba..735c4f092715 100644
--- a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
@@ -24,13 +24,14 @@ import org.apache.spark.rpc._
  * Actor which connects to a worker process and terminates the JVM if the connection is severed.
  * Provides fate sharing between a worker and its associated child processes.
  */
-private[spark] class WorkerWatcher(
-    override val rpcEnv: RpcEnv, workerUrl: String, isTesting: Boolean = false)
+private[spark] class WorkerWatcher(override val rpcEnv: RpcEnv, workerUrl: String)
   extends RpcEndpoint with Logging {
 
-  logInfo(s"Connecting to worker $workerUrl")
-  if (!isTesting) {
-    rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
+  override def onStart() {
+    logInfo(s"Connecting to worker $workerUrl")
+    if (!isTesting) {
+      rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
+    }
   }
 
   // Used to avoid shutting down JVM during tests
@@ -39,6 +40,8 @@ private[spark] class WorkerWatcher(
   // true rather than calling `System.exit`. The user can check `isShutDown` to know if
   // `exitNonZero` is called.
   private[deploy] var isShutDown = false
+  private[deploy] def setTesting(testing: Boolean) = isTesting = testing
+  private var isTesting = false
 
   // Lets filter events only from the worker's rpc system
   private val expectedAddress = RpcAddress.fromURIString(workerUrl)
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
index f527ec86ab7b..3e5b64265e91 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
@@ -37,5 +37,5 @@ private[spark] trait RpcCallContext {
   /**
    * The sender of this message.
    */
-  def senderAddress: RpcAddress
+  def sender: RpcEndpointRef
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
index f1ddc6d2cd43..dfcbc51cdf61 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
@@ -28,6 +28,20 @@ private[spark] trait RpcEnvFactory {
   def create(config: RpcEnvConfig): RpcEnv
 }
 
+/**
+ * A trait that requires RpcEnv thread-safely sending messages to it.
+ *
+ * Thread-safety means processing of one message happens before processing of the next message by
+ * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
+ * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
+ * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
+ *
+ * However, there is no guarantee that the same thread will be executing the same
+ * [[ThreadSafeRpcEndpoint]] for different messages.
+ */
+private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint
+
+
 /**
  * An end point for the RPC that defines what functions to trigger given a message.
  *
@@ -87,39 +101,38 @@ private[spark] trait RpcEndpoint {
   }
 
   /**
-   * Invoked when `remoteAddress` is connected to the current node.
+   * Invoked before [[RpcEndpoint]] starts to handle any message.
    */
-  def onConnected(remoteAddress: RpcAddress): Unit = {
+  def onStart(): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when `remoteAddress` is lost.
+   * Invoked when [[RpcEndpoint]] is stopping.
    */
-  def onDisconnected(remoteAddress: RpcAddress): Unit = {
+  def onStop(): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when some network error happens in the connection between the current node and
-   * `remoteAddress`.
+   * Invoked when `remoteAddress` is connected to the current node.
    */
-  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+  def onConnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked before [[RpcEndpoint]] starts to handle any message.
+   * Invoked when `remoteAddress` is lost.
    */
-  def onStart(): Unit = {
+  def onDisconnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when [[RpcEndpoint]] is stopping. `self` will be `null` in this method and you cannot
-   * use it to send or ask messages.
+   * Invoked when some network error happens in the connection between the current node and
+   * `remoteAddress`.
    */
-  def onStop(): Unit = {
+  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
@@ -133,17 +146,3 @@ private[spark] trait RpcEndpoint {
     }
   }
 }
-
-/**
- * A trait that requires RpcEnv thread-safely sending messages to it.
- *
- * Thread-safety means processing of one message happens before processing of the next message by
- * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
- * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
- * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
- *
- * However, there is no guarantee that the same thread will be executing the same
- * [[ThreadSafeRpcEndpoint]] for different messages.
- */
-private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint {
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
deleted file mode 100644
index d177881fb305..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.spark.rpc
-
-import org.apache.spark.SparkException
-
-private[rpc] class RpcEndpointNotFoundException(uri: String)
-  extends SparkException(s"Cannot find endpoint: $uri")
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index afe1ee8a0b4d..29debe808130 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -36,11 +36,8 @@ private[spark] object RpcEnv {
 
   private def getRpcEnvFactory(conf: SparkConf): RpcEnvFactory = {
     // Add more RpcEnv implementations here
-    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory",
-      "netty" -> "org.apache.spark.rpc.netty.NettyRpcEnvFactory")
-    // Use "netty" by default so that Jenkins can run all tests using NettyRpcEnv.
-    // Will change it back to "akka" before merging the new implementation.
-    val rpcEnvName = conf.get("spark.rpc", "netty")
+    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory")
+    val rpcEnvName = conf.get("spark.rpc", "akka")
     val rpcEnvFactoryClassName = rpcEnvNames.getOrElse(rpcEnvName.toLowerCase, rpcEnvName)
     Utils.classForName(rpcEnvFactoryClassName).newInstance().asInstanceOf[RpcEnvFactory]
   }
diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index 95132a4e4a0b..ad67e1c5ad4d 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -166,9 +166,9 @@ private[spark] class AkkaRpcEnv private[akka] (
             _sender ! AkkaMessage(response, false)
           }
 
-          // Use "lazy" because most of RpcEndpoints don't need "senderAddress"
-          override lazy val senderAddress: RpcAddress =
-            new AkkaRpcEndpointRef(defaultAddress, _sender, conf).address
+          // Some RpcEndpoints need to know the sender's address
+          override val sender: RpcEndpointRef =
+            new AkkaRpcEndpointRef(defaultAddress, _sender, conf)
         })
       } else {
         endpoint.receive
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
deleted file mode 100644
index d71e6f01dbb2..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ /dev/null
@@ -1,218 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import java.util.concurrent.{ConcurrentHashMap, LinkedBlockingQueue, TimeUnit}
-import javax.annotation.concurrent.GuardedBy
-
-import scala.collection.JavaConverters._
-import scala.concurrent.Promise
-import scala.util.control.NonFatal
-
-import org.apache.spark.{SparkException, Logging}
-import org.apache.spark.network.client.RpcResponseCallback
-import org.apache.spark.rpc._
-import org.apache.spark.util.ThreadUtils
-
-private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
-
-  private class EndpointData(
-      val name: String,
-      val endpoint: RpcEndpoint,
-      val ref: NettyRpcEndpointRef) {
-    val inbox = new Inbox(ref, endpoint)
-  }
-
-  private val endpoints = new ConcurrentHashMap[String, EndpointData]()
-  private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]()
-
-  // Track the receivers whose inboxes may contain messages.
-  private val receivers = new LinkedBlockingQueue[EndpointData]()
-
-  @GuardedBy("this")
-  private var stopped = false
-
-  def registerRpcEndpoint(name: String, endpoint: RpcEndpoint): NettyRpcEndpointRef = {
-    val addr = new NettyRpcAddress(nettyEnv.address.host, nettyEnv.address.port, name)
-    val endpointRef = new NettyRpcEndpointRef(nettyEnv.conf, addr, nettyEnv)
-    synchronized {
-      if (stopped) {
-        throw new IllegalStateException("RpcEnv has been stopped")
-      }
-      if (endpoints.putIfAbsent(name, new EndpointData(name, endpoint, endpointRef)) != null) {
-        throw new IllegalArgumentException(s"There is already an RpcEndpoint called $name")
-      }
-      val data = endpoints.get(name)
-      endpointRefs.put(data.endpoint, data.ref)
-      receivers.put(data)
-    }
-    endpointRef
-  }
-
-  def getRpcEndpointRef(endpoint: RpcEndpoint): RpcEndpointRef = endpointRefs.get(endpoint)
-
-  def removeRpcEndpointRef(endpoint: RpcEndpoint): Unit = endpointRefs.remove(endpoint)
-
-  // Should be idempotent
-  private def unregisterRpcEndpoint(name: String): Unit = {
-    val data = endpoints.remove(name)
-    if (data != null) {
-      data.inbox.stop()
-      receivers.put(data)
-    }
-    // Don't clean `endpointRefs` here because it's possible that some messages are being processed
-    // now and they can use `getRpcEndpointRef`. So `endpointRefs` will be cleaned in Inbox via
-    // `removeRpcEndpointRef`.
-  }
-
-  def stop(rpcEndpointRef: RpcEndpointRef): Unit = {
-    synchronized {
-      if (stopped) {
-        // This endpoint will be stopped by Dispatcher.stop() method.
-        return
-      }
-      unregisterRpcEndpoint(rpcEndpointRef.name)
-    }
-  }
-
-  /**
-   * Send a message to all registered [[RpcEndpoint]]s.
-   * @param message
-   */
-  def broadcastMessage(message: InboxMessage): Unit = {
-    val iter = endpoints.keySet().iterator()
-    while (iter.hasNext) {
-      val name = iter.next
-      postMessageToInbox(name, (_) => message,
-        () => { logWarning(s"Drop ${message} because ${name} has been stopped") })
-    }
-  }
-
-  def postMessage(message: RequestMessage, callback: RpcResponseCallback): Unit = {
-    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
-      val rpcCallContext =
-        new RemoteNettyRpcCallContext(
-          nettyEnv, sender, callback, message.senderAddress, message.needReply)
-      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
-    }
-
-    def onEndpointStopped(): Unit = {
-      callback.onFailure(
-        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
-    }
-
-    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
-  }
-
-  def postMessage(message: RequestMessage, p: Promise[Any]): Unit = {
-    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
-      val rpcCallContext =
-        new LocalNettyRpcCallContext(sender, message.senderAddress, message.needReply, p)
-      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
-    }
-
-    def onEndpointStopped(): Unit = {
-      p.tryFailure(
-        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
-    }
-
-    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
-  }
-
-  private def postMessageToInbox(
-      endpointName: String,
-      createMessageFn: NettyRpcEndpointRef => InboxMessage,
-      onStopped: () => Unit): Unit = {
-    val shouldCallOnStop =
-      synchronized {
-        val data = endpoints.get(endpointName)
-        if (stopped || data == null) {
-          true
-        } else {
-          data.inbox.post(createMessageFn(data.ref))
-          receivers.put(data)
-          false
-        }
-      }
-    if (shouldCallOnStop) {
-      // We don't need to call `onStop` in the `synchronized` block
-      onStopped()
-    }
-  }
-
-  private val parallelism = nettyEnv.conf.getInt("spark.rpc.netty.dispatcher.parallelism",
-    Runtime.getRuntime.availableProcessors())
-
-  private val executor = ThreadUtils.newDaemonFixedThreadPool(parallelism, "dispatcher-event-loop")
-
-  (0 until parallelism) foreach { _ =>
-    executor.execute(new MessageLoop)
-  }
-
-  def stop(): Unit = {
-    synchronized {
-      if (stopped) {
-        return
-      }
-      stopped = true
-    }
-    // Stop all endpoints. This will queue all endpoints for processing by the message loops.
-    endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
-    // Enqueue a message that tells the message loops to stop.
-    receivers.put(PoisonEndpoint)
-    executor.shutdown()
-  }
-
-  def awaitTermination(): Unit = {
-    executor.awaitTermination(Long.MaxValue, TimeUnit.MILLISECONDS)
-  }
-
-  /**
-   * Return if the endpoint exists
-   */
-  def verify(name: String): Boolean = {
-    endpoints.containsKey(name)
-  }
-
-  private class MessageLoop extends Runnable {
-    override def run(): Unit = {
-      try {
-        while (true) {
-          try {
-            val data = receivers.take()
-            if (data == PoisonEndpoint) {
-              // Put PoisonEndpoint back so that other MessageLoops can see it.
-              receivers.put(PoisonEndpoint)
-              return
-            }
-            data.inbox.process(Dispatcher.this)
-          } catch {
-            case NonFatal(e) => logError(e.getMessage, e)
-          }
-        }
-      } catch {
-        case ie: InterruptedException => // exit
-      }
-    }
-  }
-
-  /**
-   * A poison endpoint that indicates MessageLoop should exit its loop.
-   */
-  private val PoisonEndpoint = new EndpointData(null, null, null)
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
deleted file mode 100644
index 6061c9b8de94..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.spark.rpc.netty
-
-import org.apache.spark.rpc.{RpcCallContext, RpcEndpoint, RpcEnv}
-
-/**
- * A message used to ask the remote [[IDVerifier]] if an [[RpcEndpoint]] exists
- */
-private[netty] case class ID(name: String)
-
-/**
- * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if a [[RpcEndpoint]] exists in this [[RpcEnv]]
- */
-private[netty] class IDVerifier(
-    override val rpcEnv: RpcEnv, dispatcher: Dispatcher) extends RpcEndpoint {
-
-  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
-    case ID(name) => context.reply(dispatcher.verify(name))
-  }
-}
-
-private[netty] object IDVerifier {
-  val NAME = "id-verifier"
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
deleted file mode 100644
index 4803548365ab..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
+++ /dev/null
@@ -1,220 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import java.util.LinkedList
-import javax.annotation.concurrent.GuardedBy
-
-import scala.util.control.NonFatal
-
-import org.apache.spark.{Logging, SparkException}
-import org.apache.spark.rpc.{RpcAddress, RpcEndpoint, ThreadSafeRpcEndpoint}
-
-private[netty] sealed trait InboxMessage
-
-private[netty] case class ContentMessage(
-    senderAddress: RpcAddress,
-    content: Any,
-    needReply: Boolean,
-    context: NettyRpcCallContext) extends InboxMessage
-
-private[netty] case object OnStart extends InboxMessage
-
-private[netty] case object OnStop extends InboxMessage
-
-/**
- * A broadcast message that indicates connecting to a remote node.
- */
-private[netty] case class Associated(remoteAddress: RpcAddress) extends InboxMessage
-
-/**
- * A broadcast message that indicates a remote connection is lost.
- */
-private[netty] case class Disassociated(remoteAddress: RpcAddress) extends InboxMessage
-
-/**
- * A broadcast message that indicates a network error
- */
-private[netty] case class AssociationError(cause: Throwable, remoteAddress: RpcAddress)
-  extends InboxMessage
-
-/**
- * A inbox that stores messages for an [[RpcEndpoint]] and posts messages to it thread-safely.
- * @param endpointRef
- * @param endpoint
- */
-private[netty] class Inbox(
-    val endpointRef: NettyRpcEndpointRef,
-    val endpoint: RpcEndpoint) extends Logging {
-
-  @GuardedBy("this")
-  protected val messages = new LinkedList[InboxMessage]()
-
-  @GuardedBy("this")
-  private var stopped = false
-
-  @GuardedBy("this")
-  private var enableConcurrent = false
-
-  @GuardedBy("this")
-  private var workerCount = 0
-
-  // OnStart should be the first message to process
-  synchronized {
-    messages.add(OnStart)
-  }
-
-  /**
-   * Process stored messages.
-   */
-  def process(dispatcher: Dispatcher): Unit = {
-    var message: InboxMessage = null
-    synchronized {
-      if (!enableConcurrent && workerCount != 0) {
-        return
-      }
-      message = messages.poll()
-      if (message != null) {
-        workerCount += 1
-      } else {
-        return
-      }
-    }
-    while (true) {
-      safelyCall(endpoint) {
-        message match {
-          case ContentMessage(_sender, content, needReply, context) =>
-            val pf: PartialFunction[Any, Unit] =
-              if (needReply) {
-                endpoint.receiveAndReply(context)
-              } else {
-                endpoint.receive
-              }
-            try {
-              pf.applyOrElse[Any, Unit](content, { msg =>
-                throw new SparkException(s"Unmatched message $message from ${_sender}")
-              })
-              if (!needReply) {
-                context.finish()
-              }
-            } catch {
-              case NonFatal(e) =>
-                if (needReply) {
-                  // If the sender asks a reply, we should send the error back to the sender
-                  context.sendFailure(e)
-                } else {
-                  context.finish()
-                  throw e
-                }
-            }
-
-          case OnStart => {
-            endpoint.onStart()
-            if (!endpoint.isInstanceOf[ThreadSafeRpcEndpoint]) {
-              synchronized {
-                enableConcurrent = true
-              }
-            }
-          }
-
-          case OnStop =>
-            assert(synchronized { workerCount } == 1)
-            dispatcher.removeRpcEndpointRef(endpoint)
-            endpoint.onStop()
-            assert(isEmpty, "OnStop should be the last message")
-
-          case Associated(remoteAddress) =>
-            endpoint.onConnected(remoteAddress)
-
-          case Disassociated(remoteAddress) =>
-            endpoint.onDisconnected(remoteAddress)
-
-          case AssociationError(cause, remoteAddress) =>
-            endpoint.onNetworkError(cause, remoteAddress)
-        }
-      }
-
-      synchronized {
-        // "enableConcurrent" will be set to false after `onStop` is called, so we should check it
-        // every time.
-        if (!enableConcurrent && workerCount != 1) {
-          // If we are not the only one worker, exit
-          workerCount -= 1
-          return
-        }
-        message = messages.poll()
-        if (message == null) {
-          workerCount -= 1
-          return
-        }
-      }
-    }
-  }
-
-  def post(message: InboxMessage): Unit = {
-    val dropped =
-      synchronized {
-        if (stopped) {
-          // We already put "OnStop" into "messages", so we should drop further messages
-          true
-        } else {
-          messages.add(message)
-          false
-        }
-      }
-    if (dropped) {
-      onDrop(message)
-    }
-  }
-
-  def stop(): Unit = synchronized {
-    // The following codes should be in `synchronized` so that we can make sure "OnStop" is the last
-    // message
-    if (!stopped) {
-      // We should disable concurrent here. Then when RpcEndpoint.onStop is called, it's the only
-      // thread that is processing messages. So `RpcEndpoint.onStop` can release its resources
-      // safely.
-      enableConcurrent = false
-      stopped = true
-      messages.add(OnStop)
-      // Note: The concurrent events in messages will be processed one by one.
-    }
-  }
-
-  // Visible for testing.
-  protected def onDrop(message: InboxMessage): Unit = {
-    logWarning(s"Drop ${message} because $endpointRef is stopped")
-  }
-
-  def isEmpty: Boolean = synchronized { messages.isEmpty }
-
-  private def safelyCall(endpoint: RpcEndpoint)(action: => Unit): Unit = {
-    try {
-      action
-    } catch {
-      case NonFatal(e) => {
-        try {
-          endpoint.onError(e)
-        } catch {
-          case NonFatal(e) => logWarning(s"Ignore error", e)
-        }
-      }
-    }
-  }
-
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
deleted file mode 100644
index 1876b2559208..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import java.net.URI
-
-import org.apache.spark.SparkException
-import org.apache.spark.rpc.RpcAddress
-
-private[netty] case class NettyRpcAddress(host: String, port: Int, name: String) {
-
-  def toRpcAddress: RpcAddress = RpcAddress(host, port)
-
-  override val toString = s"spark://$name@$host:$port"
-}
-
-private[netty] object NettyRpcAddress {
-
-  def apply(sparkUrl: String): NettyRpcAddress = {
-    try {
-      val uri = new URI(sparkUrl)
-      val host = uri.getHost
-      val port = uri.getPort
-      val name = uri.getUserInfo
-      if (uri.getScheme != "spark" ||
-        host == null ||
-        port < 0 ||
-        name == null ||
-        (uri.getPath != null && !uri.getPath.isEmpty) || // uri.getPath returns "" instead of null
-        uri.getFragment != null ||
-        uri.getQuery != null) {
-        throw new SparkException("Invalid Spark URL: " + sparkUrl)
-      }
-      NettyRpcAddress(host, port, name)
-    } catch {
-      case e: java.net.URISyntaxException =>
-        throw new SparkException("Invalid Spark URL: " + sparkUrl, e)
-    }
-  }
-
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
deleted file mode 100644
index 75dcc02a0c5a..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import scala.concurrent.Promise
-
-import org.apache.spark.Logging
-import org.apache.spark.network.client.RpcResponseCallback
-import org.apache.spark.rpc.{RpcAddress, RpcCallContext}
-
-private[netty] abstract class NettyRpcCallContext(
-    endpointRef: NettyRpcEndpointRef,
-    override val senderAddress: RpcAddress,
-    needReply: Boolean) extends RpcCallContext with Logging {
-
-  protected def send(message: Any): Unit
-
-  override def reply(response: Any): Unit = {
-    if (needReply) {
-      send(AskResponse(endpointRef, response))
-    } else {
-      throw new IllegalStateException(
-        s"Cannot send $response to the sender because the sender won't handle it")
-    }
-  }
-
-  override def sendFailure(e: Throwable): Unit = {
-    if (needReply) {
-      send(AskResponse(endpointRef, RpcFailure(e)))
-    } else {
-      logError(e.getMessage, e)
-      throw new IllegalStateException(
-        "Cannot send reply to the sender because the sender won't handle it")
-    }
-  }
-
-  def finish(): Unit = {
-    if (!needReply) {
-      send(Ack(endpointRef))
-    }
-  }
-}
-
-/**
- * If the sender and the receiver are in the same process, the reply can be sent back via `Promise`.
- */
-private[netty] class LocalNettyRpcCallContext(
-    endpointRef: NettyRpcEndpointRef,
-    senderAddress: RpcAddress,
-    needReply: Boolean,
-    p: Promise[Any]) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
-
-  override protected def send(message: Any): Unit = {
-    p.success(message)
-  }
-}
-
-/**
- * A [[RpcCallContext]] that will call [[RpcResponseCallback]] to send the reply back.
- */
-private[netty] class RemoteNettyRpcCallContext(
-    nettyEnv: NettyRpcEnv,
-    endpointRef: NettyRpcEndpointRef,
-    callback: RpcResponseCallback,
-    senderAddress: RpcAddress,
-    needReply: Boolean) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
-
-  override protected def send(message: Any): Unit = {
-    val reply = nettyEnv.serialize(message)
-    callback.onSuccess(reply)
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
deleted file mode 100644
index 5522b40782d9..000000000000
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ /dev/null
@@ -1,504 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.spark.rpc.netty
-
-import java.io._
-import java.net.{InetSocketAddress, URI}
-import java.nio.ByteBuffer
-import java.util.Arrays
-import java.util.concurrent._
-import javax.annotation.concurrent.GuardedBy
-
-import scala.collection.JavaConverters._
-import scala.collection.mutable
-import scala.concurrent.{Future, Promise}
-import scala.reflect.ClassTag
-import scala.util.{DynamicVariable, Failure, Success}
-import scala.util.control.NonFatal
-
-import org.apache.spark.{Logging, SecurityManager, SparkConf}
-import org.apache.spark.network.TransportContext
-import org.apache.spark.network.client._
-import org.apache.spark.network.netty.SparkTransportConf
-import org.apache.spark.network.sasl.{SaslClientBootstrap, SaslServerBootstrap}
-import org.apache.spark.network.server._
-import org.apache.spark.rpc._
-import org.apache.spark.serializer.{JavaSerializer, JavaSerializerInstance}
-import org.apache.spark.util.{ThreadUtils, Utils}
-
-private[netty] class NettyRpcEnv(
-    val conf: SparkConf,
-    javaSerializerInstance: JavaSerializerInstance,
-    host: String,
-    securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
-
-  private val transportConf =
-    SparkTransportConf.fromSparkConf(conf, conf.getInt("spark.rpc.io.threads", 0))
-
-  private val dispatcher: Dispatcher = new Dispatcher(this)
-
-  private val transportContext =
-    new TransportContext(transportConf, new NettyRpcHandler(dispatcher, this))
-
-  private val clientFactory = {
-    val bootstraps: Seq[TransportClientBootstrap] =
-      if (securityManager.isAuthenticationEnabled()) {
-        Seq(new SaslClientBootstrap(transportConf, "", securityManager,
-          securityManager.isSaslEncryptionEnabled()))
-      } else {
-        Nil
-      }
-    transportContext.createClientFactory(bootstraps.asJava)
-  }
-
-  val timeoutScheduler = ThreadUtils.newDaemonSingleThreadScheduledExecutor("netty-rpc-env-timeout")
-
-  // Because TransportClientFactory.createClient is blocking, we need to run it in this thread pool
-  // to implement non-blocking send/ask.
-  // TODO: a non-blocking TransportClientFactory.createClient in future
-  private val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
-    "netty-rpc-connection",
-    conf.getInt("spark.rpc.connect.threads", 256))
-
-  @volatile private var server: TransportServer = _
-
-  def start(port: Int): Unit = {
-    val bootstraps: Seq[TransportServerBootstrap] =
-      if (securityManager.isAuthenticationEnabled()) {
-        Seq(new SaslServerBootstrap(transportConf, securityManager))
-      } else {
-        Nil
-      }
-    server = transportContext.createServer(port, bootstraps.asJava)
-    dispatcher.registerRpcEndpoint(IDVerifier.NAME, new IDVerifier(this, dispatcher))
-  }
-
-  override lazy val address: RpcAddress = {
-    require(server != null, "NettyRpcEnv has not yet started")
-    RpcAddress(host, server.getPort())
-  }
-
-  override def setupEndpoint(name: String, endpoint: RpcEndpoint): RpcEndpointRef = {
-    dispatcher.registerRpcEndpoint(name, endpoint)
-  }
-
-  def asyncSetupEndpointRefByURI(uri: String): Future[RpcEndpointRef] = {
-    val addr = NettyRpcAddress(uri)
-    val endpointRef = new NettyRpcEndpointRef(conf, addr, this)
-    val idVerifierRef =
-      new NettyRpcEndpointRef(conf, NettyRpcAddress(addr.host, addr.port, IDVerifier.NAME), this)
-    idVerifierRef.ask[Boolean](ID(endpointRef.name)).flatMap { find =>
-      if (find) {
-        Future.successful(endpointRef)
-      } else {
-        Future.failed(new RpcEndpointNotFoundException(uri))
-      }
-    }(ThreadUtils.sameThread)
-  }
-
-  override def stop(endpointRef: RpcEndpointRef): Unit = {
-    require(endpointRef.isInstanceOf[NettyRpcEndpointRef])
-    dispatcher.stop(endpointRef)
-  }
-
-  private[netty] def send(message: RequestMessage): Unit = {
-    val remoteAddr = message.receiver.address
-    if (remoteAddr == address) {
-      val promise = Promise[Any]()
-      dispatcher.postMessage(message, promise)
-      promise.future.onComplete {
-        case Success(response) =>
-          val ack = response.asInstanceOf[Ack]
-          logDebug(s"Receive ack from ${ack.sender}")
-        case Failure(e) =>
-          logError(s"Exception when sending $message", e)
-      }(ThreadUtils.sameThread)
-    } else {
-      try {
-        // `createClient` will block if it cannot find a known connection, so we should run it in
-        // clientConnectionExecutor
-        clientConnectionExecutor.execute(new Runnable {
-          override def run(): Unit = Utils.tryLogNonFatalError {
-            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
-            client.sendRpc(serialize(message), new RpcResponseCallback {
-
-              override def onFailure(e: Throwable): Unit = {
-                logError(s"Exception when sending $message", e)
-              }
-
-              override def onSuccess(response: Array[Byte]): Unit = {
-                val ack = deserialize[Ack](response)
-                logDebug(s"Receive ack from ${ack.sender}")
-              }
-            })
-          }
-        })
-      } catch {
-        case e: RejectedExecutionException => {
-          // `send` after shutting clientConnectionExecutor down, ignore it
-          logWarning(s"Cannot send ${message} because RpcEnv is stopped")
-        }
-      }
-    }
-  }
-
-  private[netty] def ask(message: RequestMessage): Future[Any] = {
-    val promise = Promise[Any]()
-    val remoteAddr = message.receiver.address
-    if (remoteAddr == address) {
-      val p = Promise[Any]()
-      dispatcher.postMessage(message, p)
-      p.future.onComplete {
-        case Success(response) =>
-          val reply = response.asInstanceOf[AskResponse]
-          if (reply.reply.isInstanceOf[RpcFailure]) {
-            if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
-              logWarning(s"Ignore failure: ${reply.reply}")
-            }
-          } else if (!promise.trySuccess(reply.reply)) {
-            logWarning(s"Ignore message: ${reply}")
-          }
-        case Failure(e) =>
-          if (!promise.tryFailure(e)) {
-            logWarning("Ignore Exception", e)
-          }
-      }(ThreadUtils.sameThread)
-    } else {
-      try {
-        // `createClient` will block if it cannot find a known connection, so we should run it in
-        // clientConnectionExecutor
-        clientConnectionExecutor.execute(new Runnable {
-          override def run(): Unit = {
-            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
-            client.sendRpc(serialize(message), new RpcResponseCallback {
-
-              override def onFailure(e: Throwable): Unit = {
-                if (!promise.tryFailure(e)) {
-                  logWarning("Ignore Exception", e)
-                }
-              }
-
-              override def onSuccess(response: Array[Byte]): Unit = {
-                val reply = deserialize[AskResponse](response)
-                if (reply.reply.isInstanceOf[RpcFailure]) {
-                  if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
-                    logWarning(s"Ignore failure: ${reply.reply}")
-                  }
-                } else if (!promise.trySuccess(reply.reply)) {
-                  logWarning(s"Ignore message: ${reply}")
-                }
-              }
-            })
-          }
-        })
-      } catch {
-        case e: RejectedExecutionException => {
-          if (!promise.tryFailure(e)) {
-            logWarning(s"Ignore failure", e)
-          }
-        }
-      }
-    }
-    promise.future
-  }
-
-  private[netty] def serialize(content: Any): Array[Byte] = {
-    val buffer = javaSerializerInstance.serialize(content)
-    Arrays.copyOfRange(
-      buffer.array(), buffer.arrayOffset + buffer.position, buffer.arrayOffset + buffer.limit)
-  }
-
-  private[netty] def deserialize[T: ClassTag](bytes: Array[Byte]): T = {
-    deserialize { () =>
-      javaSerializerInstance.deserialize[T](ByteBuffer.wrap(bytes))
-    }
-  }
-
-  override def endpointRef(endpoint: RpcEndpoint): RpcEndpointRef = {
-    dispatcher.getRpcEndpointRef(endpoint)
-  }
-
-  override def uriOf(systemName: String, address: RpcAddress, endpointName: String): String =
-    new NettyRpcAddress(address.host, address.port, endpointName).toString
-
-  override def shutdown(): Unit = {
-    cleanup()
-  }
-
-  override def awaitTermination(): Unit = {
-    dispatcher.awaitTermination()
-  }
-
-  private def cleanup(): Unit = {
-    if (timeoutScheduler != null) {
-      timeoutScheduler.shutdownNow()
-    }
-    if (server != null) {
-      server.close()
-    }
-    if (clientFactory != null) {
-      clientFactory.close()
-    }
-    if (dispatcher != null) {
-      dispatcher.stop()
-    }
-    if (clientConnectionExecutor != null) {
-      clientConnectionExecutor.shutdownNow()
-    }
-  }
-
-  override def deserialize[T](deserializationAction: () => T): T = {
-    NettyRpcEnv.currentEnv.withValue(this) {
-      deserializationAction()
-    }
-  }
-}
-
-private[netty] object NettyRpcEnv extends Logging {
-
-  /**
-   * When deserializing the [[NettyRpcEndpointRef]], it needs a reference to [[NettyRpcEnv]].
-   * Use `currentEnv` to wrap the deserialization codes. E.g.,
-   *
-   * {{{
-   *   NettyRpcEnv.currentEnv.withValue(this) {
-   *     your deserialization codes
-   *   }
-   * }}}
-   */
-  private[netty] val currentEnv = new DynamicVariable[NettyRpcEnv](null)
-}
-
-private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
-
-  def create(config: RpcEnvConfig): RpcEnv = {
-    val sparkConf = config.conf
-    // Use JavaSerializerInstance in multiple threads is safe. However, if we plan to support
-    // KryoSerializer in future, we have to use ThreadLocal to store SerializerInstance
-    val javaSerializerInstance =
-      new JavaSerializer(sparkConf).newInstance().asInstanceOf[JavaSerializerInstance]
-    val nettyEnv =
-      new NettyRpcEnv(sparkConf, javaSerializerInstance, config.host, config.securityManager)
-    val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
-      nettyEnv.start(actualPort)
-      (nettyEnv, actualPort)
-    }
-    try {
-      Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
-    } catch {
-      case NonFatal(e) =>
-        nettyEnv.shutdown()
-        throw e
-    }
-  }
-}
-
-private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
-  extends RpcEndpointRef(conf) with Serializable with Logging {
-
-  @transient @volatile private var nettyEnv: NettyRpcEnv = _
-
-  @transient @volatile private var _address: NettyRpcAddress = _
-
-  def this(conf: SparkConf, _address: NettyRpcAddress, nettyEnv: NettyRpcEnv) {
-    this(conf)
-    this._address = _address
-    this.nettyEnv = nettyEnv
-  }
-
-  override def address: RpcAddress = _address.toRpcAddress
-
-  private def readObject(in: ObjectInputStream): Unit = {
-    in.defaultReadObject()
-    _address = in.readObject().asInstanceOf[NettyRpcAddress]
-    nettyEnv = NettyRpcEnv.currentEnv.value
-  }
-
-  private def writeObject(out: ObjectOutputStream): Unit = {
-    out.defaultWriteObject()
-    out.writeObject(_address)
-  }
-
-  override def name: String = _address.name
-
-  override def ask[T: ClassTag](message: Any, timeout: RpcTimeout): Future[T] = {
-    val promise = Promise[Any]()
-    val timeoutCancelable = nettyEnv.timeoutScheduler.schedule(new Runnable {
-      override def run(): Unit = {
-        promise.tryFailure(new TimeoutException("Cannot receive any reply in " + timeout.duration))
-      }
-    }, timeout.duration.toNanos, TimeUnit.NANOSECONDS)
-    val f = nettyEnv.ask(RequestMessage(nettyEnv.address, this, message, true))
-    f.onComplete { v =>
-      timeoutCancelable.cancel(true)
-      if (!promise.tryComplete(v)) {
-        logWarning(s"Ignore message $v")
-      }
-    }(ThreadUtils.sameThread)
-    promise.future.mapTo[T].recover(timeout.addMessageIfTimeout)(ThreadUtils.sameThread)
-  }
-
-  override def send(message: Any): Unit = {
-    require(message != null, "Message is null")
-    nettyEnv.send(RequestMessage(nettyEnv.address, this, message, false))
-  }
-
-  override def toString: String = s"NettyRpcEndpointRef(${_address})"
-
-  def toURI: URI = new URI(s"spark://${_address}")
-
-  final override def equals(that: Any): Boolean = that match {
-    case other: NettyRpcEndpointRef => _address == other._address
-    case _ => false
-  }
-
-  final override def hashCode(): Int = if (_address == null) 0 else _address.hashCode()
-}
-
-/**
- * The message that is sent from the sender to the receiver.
- */
-private[netty] case class RequestMessage(
-    senderAddress: RpcAddress, receiver: NettyRpcEndpointRef, content: Any, needReply: Boolean)
-
-/**
- * The base trait for all messages that are sent back from the receiver to the sender.
- */
-private[netty] trait ResponseMessage
-
-/**
- * The reply for `ask` from the receiver side.
- */
-private[netty] case class AskResponse(sender: NettyRpcEndpointRef, reply: Any)
-  extends ResponseMessage
-
-/**
- * A message to send back to the receiver side. It's necessary because [[TransportClient]] only
- * clean the resources when it receives a reply.
- */
-private[netty] case class Ack(sender: NettyRpcEndpointRef) extends ResponseMessage
-
-/**
- * A response that indicates some failure happens in the receiver side.
- */
-private[netty] case class RpcFailure(e: Throwable)
-
-/**
- * Maintain the mapping relations between client addresses and [[RpcEnv]] addresses, broadcast
- * network events and forward messages to [[Dispatcher]].
- */
-private[netty] class NettyRpcHandler(
-    dispatcher: Dispatcher, nettyEnv: NettyRpcEnv) extends RpcHandler with Logging {
-
-  private type ClientAddress = RpcAddress
-  private type RemoteEnvAddress = RpcAddress
-
-  // Store all client addresses and their NettyRpcEnv addresses.
-  @GuardedBy("this")
-  private val remoteAddresses = new mutable.HashMap[ClientAddress, RemoteEnvAddress]()
-
-  // Store the connections from other NettyRpcEnv addresses. We need to keep track of the connection
-  // count because `TransportClientFactory.createClient` will create multiple connections
-  // (at most `spark.shuffle.io.numConnectionsPerPeer` connections) and randomly select a connection
-  // to send the message. See `TransportClientFactory.createClient` for more details.
-  @GuardedBy("this")
-  private val remoteConnectionCount = new mutable.HashMap[RemoteEnvAddress, Int]()
-
-  override def receive(
-      client: TransportClient, message: Array[Byte], callback: RpcResponseCallback): Unit = {
-    val requestMessage = nettyEnv.deserialize[RequestMessage](message)
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
-    assert(addr != null)
-    val remoteEnvAddress = requestMessage.senderAddress
-    val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-    val broadcastMessage =
-      synchronized {
-        // If the first connection to a remote RpcEnv is found, we should broadcast "Associated"
-        if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
-          // clientAddr connects at the first time
-          val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
-          // Increase the connection number of remoteEnvAddress
-          remoteConnectionCount.put(remoteEnvAddress, count + 1)
-          if (count == 0) {
-            // This is the first connection, so fire "Associated"
-            Some(Associated(remoteEnvAddress))
-          } else {
-            None
-          }
-        } else {
-          None
-        }
-      }
-    broadcastMessage.foreach(dispatcher.broadcastMessage)
-    dispatcher.postMessage(requestMessage, callback)
-  }
-
-  override def getStreamManager: StreamManager = new OneForOneStreamManager
-
-  override def exceptionCaught(cause: Throwable, client: TransportClient): Unit = {
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
-    if (addr != null) {
-      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-      val broadcastMessage =
-        synchronized {
-          remoteAddresses.get(clientAddr).map(AssociationError(cause, _))
-        }
-      if (broadcastMessage.isEmpty) {
-        logError(cause.getMessage, cause)
-      } else {
-        dispatcher.broadcastMessage(broadcastMessage.get)
-      }
-    } else {
-      // If the channel is closed before connecting, its remoteAddress will be null.
-      // See java.net.Socket.getRemoteSocketAddress
-      // Because we cannot get a RpcAddress, just log it
-      logError("Exception before connecting to the client", cause)
-    }
-  }
-
-  override def connectionTerminated(client: TransportClient): Unit = {
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
-    if (addr != null) {
-      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-      val broadcastMessage =
-        synchronized {
-          // If the last connection to a remote RpcEnv is terminated, we should broadcast
-          // "Disassociated"
-          remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
-            remoteAddresses -= clientAddr
-            val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
-            assert(count != 0, "remoteAddresses and remoteConnectionCount are not consistent")
-            if (count - 1 == 0) {
-              // We lost all clients, so clean up and fire "Disassociated"
-              remoteConnectionCount.remove(remoteEnvAddress)
-              Some(Disassociated(remoteEnvAddress))
-            } else {
-              // Decrease the connection number of remoteEnvAddress
-              remoteConnectionCount.put(remoteEnvAddress, count - 1)
-              None
-            }
-          }
-        }
-      broadcastMessage.foreach(dispatcher.broadcastMessage)
-    } else {
-      // If the channel is closed before connecting, its remoteAddress will be null. In this case,
-      // we can ignore it since we don't fire "Associated".
-      // See java.net.Socket.getRemoteSocketAddress
-    }
-  }
-
-}
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
index e749631bf6f1..7478ab0fc2f7 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
@@ -19,7 +19,7 @@ package org.apache.spark.storage
 
 import scala.concurrent.{ExecutionContext, Future}
 
-import org.apache.spark.rpc.{ThreadSafeRpcEndpoint, RpcEnv, RpcCallContext, RpcEndpoint}
+import org.apache.spark.rpc.{RpcEnv, RpcCallContext, RpcEndpoint}
 import org.apache.spark.util.ThreadUtils
 import org.apache.spark.{Logging, MapOutputTracker, SparkEnv}
 import org.apache.spark.storage.BlockManagerMessages._
@@ -33,7 +33,7 @@ class BlockManagerSlaveEndpoint(
     override val rpcEnv: RpcEnv,
     blockManager: BlockManager,
     mapOutputTracker: MapOutputTracker)
-  extends ThreadSafeRpcEndpoint with Logging {
+  extends RpcEndpoint with Logging {
 
   private val asyncThreadPool =
     ThreadUtils.newDaemonCachedThreadPool("block-manager-slave-async-thread-pool")
@@ -80,7 +80,7 @@ class BlockManagerSlaveEndpoint(
     future.onSuccess { case response =>
       logDebug("Done " + actionMessage + ", response is " + response)
       context.reply(response)
-      logDebug("Sent response: " + response + " to " + context.senderAddress)
+      logDebug("Sent response: " + response + " to " + context.sender)
     }
     future.onFailure { case t: Throwable =>
       logError("Error in " + actionMessage, t)
diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index 1ed098379e29..22e291a2b48d 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -85,11 +85,7 @@ private[spark] object ThreadUtils {
    */
   def newDaemonSingleThreadScheduledExecutor(threadName: String): ScheduledExecutorService = {
     val threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat(threadName).build()
-    val executor = new ScheduledThreadPoolExecutor(1, threadFactory)
-    // By default, a cancelled task is not automatically removed from the work queue until its delay
-    // elapses. We have to enable it manually.
-    executor.setRemoveOnCancelPolicy(true)
-    executor
+    Executors.newSingleThreadScheduledExecutor(threadFactory)
   }
 
   /**
diff --git a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
index 7e70308bb360..af4e68950f75 100644
--- a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
@@ -168,9 +168,10 @@ class MapOutputTrackerSuite extends SparkFunSuite {
     masterTracker.registerShuffle(10, 1)
     masterTracker.registerMapOutput(10, 0, MapStatus(
       BlockManagerId("88", "mph", 1000), Array.fill[Long](10)(0)))
-    val senderAddress = RpcAddress("localhost", 12345)
+    val sender = mock(classOf[RpcEndpointRef])
+    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
+    when(rpcCallContext.sender).thenReturn(sender)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(10))
     verify(rpcCallContext).reply(any())
     verify(rpcCallContext, never()).sendFailure(any())
@@ -197,9 +198,10 @@ class MapOutputTrackerSuite extends SparkFunSuite {
       masterTracker.registerMapOutput(20, i, new CompressedMapStatus(
         BlockManagerId("999", "mps", 1000), Array.fill[Long](4000000)(0)))
     }
-    val senderAddress = RpcAddress("localhost", 12345)
+    val sender = mock(classOf[RpcEndpointRef])
+    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
+    when(rpcCallContext.sender).thenReturn(sender)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(20))
     verify(rpcCallContext, never()).reply(any())
     verify(rpcCallContext).sendFailure(isA(classOf[SparkException]))
diff --git a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
index 2d14249855c9..33270bec6247 100644
--- a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
+++ b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
@@ -41,7 +41,6 @@ object SSLSampleConfigs {
 
   def sparkSSLConfig(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
-    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", keyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
@@ -55,7 +54,6 @@ object SSLSampleConfigs {
 
   def sparkSSLConfigUntrusted(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
-    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", untrustedKeyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
diff --git a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
index 40c24bdecc6c..e9034e39a715 100644
--- a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
@@ -26,7 +26,8 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val conf = new SparkConf()
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
+    workerWatcher.setTesting(testing = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(RpcAddress("1.2.3.4", 1234))
     assert(workerWatcher.isShutDown)
@@ -38,7 +39,8 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
     val otherRpcAddress = RpcAddress("4.3.2.1", 1234)
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
+    workerWatcher.setTesting(testing = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(otherRpcAddress)
     assert(!workerWatcher.isShutDown)
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index e836946a5943..6ceafe433774 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.rpc
 
-import java.io.NotSerializableException
 import java.util.concurrent.{TimeUnit, CountDownLatch, TimeoutException}
 
 import scala.collection.mutable
@@ -100,6 +99,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     }
     val rpcEndpointRef = env.setupEndpoint("send-ref", endpoint)
+
     val newRpcEndpointRef = rpcEndpointRef.askWithRetry[RpcEndpointRef]("Hello")
     val reply = newRpcEndpointRef.askWithRetry[String]("Echo")
     assert("Echo" === reply)
@@ -516,9 +516,6 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       assert(events === List(
         ("onConnected", remoteAddress),
         ("onNetworkError", remoteAddress),
-        ("onDisconnected", remoteAddress)) ||
-        events === List(
-        ("onConnected", remoteAddress),
         ("onDisconnected", remoteAddress)))
     }
   }
@@ -538,84 +535,15 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       "local", env.address, "sendWithReply-unserializable-error")
     try {
       val f = rpcEndpointRef.ask[String]("hello")
-      val e = intercept[Exception] {
+      intercept[TimeoutException] {
         Await.result(f, 1 seconds)
       }
-      assert(e.isInstanceOf[TimeoutException] || // For Akka
-        e.isInstanceOf[NotSerializableException] // For Netty
-      )
     } finally {
       anotherEnv.shutdown()
       anotherEnv.awaitTermination()
     }
   }
 
-  test("port conflict") {
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", env.address.port)
-    assert(anotherEnv.address.port != env.address.port)
-  }
-
-  test("send with authentication") {
-    val conf = new SparkConf
-    conf.set("spark.authenticate", "true")
-    conf.set("spark.authenticate.secret", "good")
-
-    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
-
-    try {
-      @volatile var message: String = null
-      localEnv.setupEndpoint("send-authentication", new RpcEndpoint {
-        override val rpcEnv = localEnv
-
-        override def receive: PartialFunction[Any, Unit] = {
-          case msg: String => message = msg
-        }
-      })
-      val rpcEndpointRef =
-        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "send-authentication")
-      rpcEndpointRef.send("hello")
-      eventually(timeout(5 seconds), interval(10 millis)) {
-        assert("hello" === message)
-      }
-    } finally {
-      localEnv.shutdown()
-      localEnv.awaitTermination()
-      remoteEnv.shutdown()
-      remoteEnv.awaitTermination()
-    }
-  }
-
-  test("ask with authentication") {
-    val conf = new SparkConf
-    conf.set("spark.authenticate", "true")
-    conf.set("spark.authenticate.secret", "good")
-
-    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
-
-    try {
-      localEnv.setupEndpoint("ask-authentication", new RpcEndpoint {
-        override val rpcEnv = localEnv
-
-        override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
-          case msg: String => {
-            context.reply(msg)
-          }
-        }
-      })
-      val rpcEndpointRef =
-        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "ask-authentication")
-      val reply = rpcEndpointRef.askWithRetry[String]("hello")
-      assert("hello" === reply)
-    } finally {
-      localEnv.shutdown()
-      localEnv.awaitTermination()
-      remoteEnv.shutdown()
-      remoteEnv.awaitTermination()
-    }
-  }
-
   test("construct RpcTimeout with conf property") {
     val conf = new SparkConf
 
@@ -684,7 +612,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     // once the future is complete to verify addMessageIfTimeout was invoked
     val reply3 =
       intercept[RpcTimeoutException] {
-        Await.result(fut3, 2000 millis)
+        Await.result(fut3, 200 millis)
       }.getMessage
 
     // When the future timed out, the recover callback should have used
diff --git a/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala b/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
deleted file mode 100644
index 5e8da3e205ab..000000000000
--- a/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc
-
-import scala.collection.mutable.ArrayBuffer
-
-import org.scalactic.TripleEquals
-
-class TestRpcEndpoint extends ThreadSafeRpcEndpoint with TripleEquals {
-
-  override val rpcEnv: RpcEnv = null
-
-  @volatile private var receiveMessages = ArrayBuffer[Any]()
-
-  @volatile private var receiveAndReplyMessages = ArrayBuffer[Any]()
-
-  @volatile private var onConnectedMessages = ArrayBuffer[RpcAddress]()
-
-  @volatile private var onDisconnectedMessages = ArrayBuffer[RpcAddress]()
-
-  @volatile private var onNetworkErrorMessages = ArrayBuffer[(Throwable, RpcAddress)]()
-
-  @volatile private var started = false
-
-  @volatile private var stopped = false
-
-  override def receive: PartialFunction[Any, Unit] = {
-    case message: Any => receiveMessages += message
-  }
-
-  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
-    case message: Any => receiveAndReplyMessages += message
-  }
-
-  override def onConnected(remoteAddress: RpcAddress): Unit = {
-    onConnectedMessages += remoteAddress
-  }
-
-  /**
-   * Invoked when some network error happens in the connection between the current node and
-   * `remoteAddress`.
-   */
-  override def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
-    onNetworkErrorMessages += cause -> remoteAddress
-  }
-
-  override def onDisconnected(remoteAddress: RpcAddress): Unit = {
-    onDisconnectedMessages += remoteAddress
-  }
-
-  def numReceiveMessages: Int = receiveMessages.size
-
-  override def onStart(): Unit = {
-    started = true
-  }
-
-  override def onStop(): Unit = {
-    stopped = true
-  }
-
-  def verifyStarted(): Unit = {
-    assert(started, "RpcEndpoint is not started")
-  }
-
-  def verifyStopped(): Unit = {
-    assert(stopped, "RpcEndpoint is not stopped")
-  }
-
-  def verifyReceiveMessages(expected: Seq[Any]): Unit = {
-    assert(receiveMessages === expected)
-  }
-
-  def verifySingleReceiveMessage(message: Any): Unit = {
-    verifyReceiveMessages(List(message))
-  }
-
-  def verifyReceiveAndReplyMessages(expected: Seq[Any]): Unit = {
-    assert(receiveAndReplyMessages === expected)
-  }
-
-  def verifySingleReceiveAndReplyMessage(message: Any): Unit = {
-    verifyReceiveAndReplyMessages(List(message))
-  }
-
-  def verifySingleOnConnectedMessage(remoteAddress: RpcAddress): Unit = {
-    verifyOnConnectedMessages(List(remoteAddress))
-  }
-
-  def verifyOnConnectedMessages(expected: Seq[RpcAddress]): Unit = {
-    assert(onConnectedMessages === expected)
-  }
-
-  def verifySingleOnDisconnectedMessage(remoteAddress: RpcAddress): Unit = {
-    verifyOnDisconnectedMessages(List(remoteAddress))
-  }
-
-  def verifyOnDisconnectedMessages(expected: Seq[RpcAddress]): Unit = {
-    assert(onDisconnectedMessages === expected)
-  }
-
-  def verifySingleOnNetworkErrorMessage(cause: Throwable, remoteAddress: RpcAddress): Unit = {
-    verifyOnNetworkErrorMessages(List(cause -> remoteAddress))
-  }
-
-  def verifyOnNetworkErrorMessages(expected: Seq[(Throwable, RpcAddress)]): Unit = {
-    assert(onNetworkErrorMessages === expected)
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
deleted file mode 100644
index ff83ab9b32cb..000000000000
--- a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import java.util.concurrent.{CountDownLatch, TimeUnit}
-import java.util.concurrent.atomic.AtomicInteger
-
-import org.mockito.Mockito._
-
-import org.apache.spark.SparkFunSuite
-import org.apache.spark.rpc.{RpcEnv, RpcEndpoint, RpcAddress, TestRpcEndpoint}
-
-class InboxSuite extends SparkFunSuite {
-
-  test("post") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    when(endpointRef.name).thenReturn("hello")
-
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val inbox = new Inbox(endpointRef, endpoint)
-    val message = ContentMessage(null, "hi", false, null)
-    inbox.post(message)
-    inbox.process(dispatcher)
-    assert(inbox.isEmpty)
-
-    endpoint.verifySingleReceiveMessage("hi")
-
-    inbox.stop()
-    inbox.process(dispatcher)
-    assert(inbox.isEmpty)
-    endpoint.verifyStarted()
-    endpoint.verifyStopped()
-  }
-
-  test("post: with reply") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val inbox = new Inbox(endpointRef, endpoint)
-    val message = ContentMessage(null, "hi", true, null)
-    inbox.post(message)
-    inbox.process(dispatcher)
-    assert(inbox.isEmpty)
-
-    endpoint.verifySingleReceiveAndReplyMessage("hi")
-  }
-
-  test("post: multiple threads") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    when(endpointRef.name).thenReturn("hello")
-
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val numDroppedMessages = new AtomicInteger(0)
-    val inbox = new Inbox(endpointRef, endpoint) {
-      override def onDrop(message: InboxMessage): Unit = {
-        numDroppedMessages.incrementAndGet()
-      }
-    }
-
-    val exitLatch = new CountDownLatch(10)
-
-    for (_ <- 0 until 10) {
-      new Thread {
-        override def run(): Unit = {
-          for (_ <- 0 until 100) {
-            val message = ContentMessage(null, "hi", false, null)
-            inbox.post(message)
-          }
-          exitLatch.countDown()
-        }
-      }.start()
-    }
-    inbox.process(dispatcher)
-    assert(inbox.isEmpty)
-    inbox.stop()
-    inbox.process(dispatcher)
-    assert(inbox.isEmpty)
-
-    exitLatch.await(30, TimeUnit.SECONDS)
-
-    assert(1000 === endpoint.numReceiveMessages + numDroppedMessages.get)
-    endpoint.verifyStarted()
-    endpoint.verifyStopped()
-  }
-
-  test("post: Associated") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val remoteAddress = RpcAddress("localhost", 11111)
-
-    val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(Associated(remoteAddress))
-    inbox.process(dispatcher)
-
-    endpoint.verifySingleOnConnectedMessage(remoteAddress)
-  }
-
-  test("post: Disassociated") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val remoteAddress = RpcAddress("localhost", 11111)
-
-    val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(Disassociated(remoteAddress))
-    inbox.process(dispatcher)
-
-    endpoint.verifySingleOnDisconnectedMessage(remoteAddress)
-  }
-
-  test("post: AssociationError") {
-    val endpoint = new TestRpcEndpoint
-    val endpointRef = mock(classOf[NettyRpcEndpointRef])
-    val dispatcher = mock(classOf[Dispatcher])
-
-    val remoteAddress = RpcAddress("localhost", 11111)
-    val cause = new RuntimeException("Oops")
-
-    val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(AssociationError(cause, remoteAddress))
-    inbox.process(dispatcher)
-
-    endpoint.verifySingleOnNetworkErrorMessage(cause, remoteAddress)
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
deleted file mode 100644
index a5d43d3704e3..000000000000
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import org.apache.spark.SparkFunSuite
-
-class NettyRpcAddressSuite extends SparkFunSuite {
-
-  test("toString") {
-    val addr = NettyRpcAddress("localhost", 12345, "test")
-    assert(addr.toString === "spark://test@localhost:12345")
-  }
-
-}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
deleted file mode 100644
index be19668e17c0..000000000000
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import org.apache.spark.{SecurityManager, SparkConf}
-import org.apache.spark.rpc._
-
-class NettyRpcEnvSuite extends RpcEnvSuite {
-
-  override def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv = {
-    val config = RpcEnvConfig(conf, "test", "localhost", port, new SecurityManager(conf))
-    new NettyRpcEnvFactory().create(config)
-  }
-
-  test("non-existent endpoint") {
-    val uri = env.uriOf("test", env.address, "nonexist-endpoint")
-    val e = intercept[RpcEndpointNotFoundException] {
-      env.setupEndpointRef("test", env.address, "nonexist-endpoint")
-    }
-    assert(e.getMessage.contains(uri))
-  }
-
-}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
deleted file mode 100644
index 06ca035d199e..000000000000
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rpc.netty
-
-import java.net.InetSocketAddress
-
-import io.netty.channel.Channel
-import org.mockito.Mockito._
-import org.mockito.Matchers._
-
-import org.apache.spark.SparkFunSuite
-import org.apache.spark.network.client.{TransportResponseHandler, TransportClient}
-import org.apache.spark.rpc._
-
-class NettyRpcHandlerSuite extends SparkFunSuite {
-
-  val env = mock(classOf[NettyRpcEnv])
-  when(env.deserialize(any(classOf[Array[Byte]]))(any())).
-    thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
-
-  test("receive") {
-    val dispatcher = mock(classOf[Dispatcher])
-    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
-
-    val channel = mock(classOf[Channel])
-    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
-    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
-    nettyRpcHandler.receive(client, null, null)
-
-    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40001))
-    nettyRpcHandler.receive(client, null, null)
-
-    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
-  }
-
-  test("connectionTerminated") {
-    val dispatcher = mock(classOf[Dispatcher])
-    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
-
-    val channel = mock(classOf[Channel])
-    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
-    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
-    nettyRpcHandler.receive(client, null, null)
-
-    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
-    nettyRpcHandler.connectionTerminated(client)
-
-    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
-    verify(dispatcher, times(1)).broadcastMessage(Disassociated(RpcAddress("localhost", 12345)))
-  }
-
-}
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
index fbb8bb6b2f6c..df841288a02e 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
@@ -78,10 +78,6 @@ public TransportClient(Channel channel, TransportResponseHandler handler) {
     this.handler = Preconditions.checkNotNull(handler);
   }
 
-  public Channel getChannel() {
-    return channel;
-  }
-
   public boolean isActive() {
     return channel.isOpen() || channel.isActive();
   }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
index dbb7f95f55bc..2ba92a40f8b0 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
@@ -52,6 +52,4 @@ public abstract void receive(
    * No further requests will come from this client.
    */
   public void connectionTerminated(TransportClient client) { }
-
-  public void exceptionCaught(Throwable cause, TransportClient client) { }
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
index 96941d26be19..df6027805838 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
@@ -71,7 +71,6 @@ public TransportRequestHandler(
 
   @Override
   public void exceptionCaught(Throwable cause) {
-    rpcHandler.exceptionCaught(cause, reverseClient);
   }
 
   @Override
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index d053e9e84910..204e6142fd6c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -474,7 +474,7 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       // Remote messages
       case RegisterReceiver(streamId, typ, hostPort, receiverEndpoint) =>
         val successful =
-          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.senderAddress)
+          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.sender.address)
         context.reply(successful)
       case AddBlock(receivedBlockInfo) =>
         context.reply(addBlock(receivedBlockInfo))
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 32d218169a6e..93621b44c918 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -556,7 +556,10 @@ private[spark] class ApplicationMaster(
       override val rpcEnv: RpcEnv, driver: RpcEndpointRef, isClusterMode: Boolean)
     extends RpcEndpoint with Logging {
 
-    driver.send(RegisterClusterManager(self))
+    override def onStart(): Unit = {
+      driver.send(RegisterClusterManager(self))
+
+    }
 
     override def receive: PartialFunction[Any, Unit] = {
       case x: AddWebUIFilter =>

From 341b13f8f5eb118f1fb4d4f84418715ac4750a4d Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Thu, 24 Sep 2015 09:54:07 -0700
Subject: [PATCH 095/896] [SPARK-10765] [SQL] use new aggregate interface for
 hive UDAF

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8874 from cloud-fan/hive-agg.
---
 .../expressions/aggregate/interfaces.scala    |   7 +-
 .../spark/sql/execution/SparkStrategies.scala |  14 +-
 .../aggregate/AggregationIterator.scala       |   2 +-
 .../spark/sql/execution/aggregate/utils.scala |  51 +++++++
 .../org/apache/spark/sql/hive/hiveUDFs.scala  | 139 +++++++-----------
 .../sql/hive/execution/HiveUDFSuite.scala     |   2 +-
 6 files changed, 129 insertions(+), 86 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index 576d8c7a3a68..d8699533cd15 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
-import org.apache.spark.sql.catalyst.errors.TreeNodeException
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.catalyst.InternalRow
@@ -169,6 +168,12 @@ abstract class AggregateFunction2
 
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
     throw new UnsupportedOperationException(s"Cannot evaluate expression: $this")
+
+  /**
+   * Indicates if this function supports partial aggregation.
+   * Currently Hive UDAF is the only one that doesn't support partial aggregation.
+   */
+  def supportsPartial: Boolean = true
 }
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 41b215c79296..b078c8b6b05c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -221,7 +221,19 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
             }
 
             val aggregateOperator =
-              if (functionsWithDistinct.isEmpty) {
+              if (aggregateExpressions.map(_.aggregateFunction).exists(!_.supportsPartial)) {
+                if (functionsWithDistinct.nonEmpty) {
+                  sys.error("Distinct columns cannot exist in Aggregate operator containing " +
+                    "aggregate functions which don't support partial aggregation.")
+                } else {
+                  aggregate.Utils.planAggregateWithoutPartial(
+                    groupingExpressions,
+                    aggregateExpressions,
+                    aggregateFunctionMap,
+                    resultExpressions,
+                    planLater(child))
+                }
+              } else if (functionsWithDistinct.isEmpty) {
                 aggregate.Utils.planAggregateWithoutDistinct(
                   groupingExpressions,
                   aggregateExpressions,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index abca373b0c4f..62dbc07e883f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -26,7 +26,7 @@ import org.apache.spark.unsafe.KVIterator
 import scala.collection.mutable.ArrayBuffer
 
 /**
- * The base class of [[SortBasedAggregationIterator]] and [[UnsafeHybridAggregationIterator]].
+ * The base class of [[SortBasedAggregationIterator]].
  * It mainly contains two parts:
  * 1. It initializes aggregate functions.
  * 2. It creates two functions, `processRow` and `generateOutput` based on [[AggregateMode]] of
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index 80816a095ea8..4f5e86cceb8a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -37,6 +37,57 @@ object Utils {
       UnsafeProjection.canSupport(groupingExpressions)
   }
 
+  def planAggregateWithoutPartial(
+      groupingExpressions: Seq[Expression],
+      aggregateExpressions: Seq[AggregateExpression2],
+      aggregateFunctionMap: Map[(AggregateFunction2, Boolean), (AggregateFunction2, Attribute)],
+      resultExpressions: Seq[NamedExpression],
+      child: SparkPlan): Seq[SparkPlan] = {
+
+    val namedGroupingExpressions = groupingExpressions.map {
+      case ne: NamedExpression => ne -> ne
+      // If the expression is not a NamedExpressions, we add an alias.
+      // So, when we generate the result of the operator, the Aggregate Operator
+      // can directly get the Seq of attributes representing the grouping expressions.
+      case other =>
+        val withAlias = Alias(other, other.toString)()
+        other -> withAlias
+    }
+    val groupExpressionMap = namedGroupingExpressions.toMap
+    val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
+
+    val completeAggregateExpressions = aggregateExpressions.map(_.copy(mode = Complete))
+    val completeAggregateAttributes =
+      completeAggregateExpressions.map {
+        expr => aggregateFunctionMap(expr.aggregateFunction, expr.isDistinct)._2
+      }
+
+    val rewrittenResultExpressions = resultExpressions.map { expr =>
+      expr.transformDown {
+        case agg: AggregateExpression2 =>
+          aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._2
+        case expression =>
+          // We do not rely on the equality check at here since attributes may
+          // different cosmetically. Instead, we use semanticEquals.
+          groupExpressionMap.collectFirst {
+            case (expr, ne) if expr semanticEquals expression => ne.toAttribute
+          }.getOrElse(expression)
+      }.asInstanceOf[NamedExpression]
+    }
+
+    SortBasedAggregate(
+      requiredChildDistributionExpressions = Some(namedGroupingAttributes),
+      groupingExpressions = namedGroupingExpressions.map(_._2),
+      nonCompleteAggregateExpressions = Nil,
+      nonCompleteAggregateAttributes = Nil,
+      completeAggregateExpressions = completeAggregateExpressions,
+      completeAggregateAttributes = completeAggregateAttributes,
+      initialInputBufferOffset = 0,
+      resultExpressions = rewrittenResultExpressions,
+      child = child
+    ) :: Nil
+  }
+
   def planAggregateWithoutDistinct(
       groupingExpressions: Seq[Expression],
       aggregateExpressions: Seq[AggregateExpression2],
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index cad02373e5ba..fa9012b96edd 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -37,6 +37,7 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis
 import org.apache.spark.sql.catalyst.analysis.FunctionRegistry.FunctionBuilder
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules.Rule
@@ -65,9 +66,10 @@ private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
         HiveGenericUDF(new HiveFunctionWrapper(functionClassName), children)
       } else if (
         classOf[AbstractGenericUDAFResolver].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveGenericUDAF(new HiveFunctionWrapper(functionClassName), children)
+        HiveUDAFFunction(new HiveFunctionWrapper(functionClassName), children)
       } else if (classOf[UDAF].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveUDAF(new HiveFunctionWrapper(functionClassName), children)
+        HiveUDAFFunction(
+          new HiveFunctionWrapper(functionClassName), children, isUDAFBridgeRequired = true)
       } else if (classOf[GenericUDTF].isAssignableFrom(functionInfo.getFunctionClass)) {
         HiveGenericUDTF(new HiveFunctionWrapper(functionClassName), children)
       } else {
@@ -441,70 +443,6 @@ private[hive] case class HiveWindowFunction(
     new HiveWindowFunction(funcWrapper, pivotResult, isUDAFBridgeRequired, children)
 }
 
-private[hive] case class HiveGenericUDAF(
-    funcWrapper: HiveFunctionWrapper,
-    children: Seq[Expression]) extends AggregateExpression1
-  with HiveInspectors {
-
-  type UDFType = AbstractGenericUDAFResolver
-
-  @transient
-  protected lazy val resolver: AbstractGenericUDAFResolver = funcWrapper.createFunction()
-
-  @transient
-  protected lazy val objectInspector = {
-    val parameterInfo = new SimpleGenericUDAFParameterInfo(inspectors.toArray, false, false)
-    resolver.getEvaluator(parameterInfo)
-      .init(GenericUDAFEvaluator.Mode.COMPLETE, inspectors.toArray)
-  }
-
-  @transient
-  protected lazy val inspectors = children.map(toInspector)
-
-  def dataType: DataType = inspectorToDataType(objectInspector)
-
-  def nullable: Boolean = true
-
-  override def toString: String = {
-    s"$nodeName#${funcWrapper.functionClassName}(${children.mkString(",")})"
-  }
-
-  def newInstance(): HiveUDAFFunction = new HiveUDAFFunction(funcWrapper, children, this)
-}
-
-/** It is used as a wrapper for the hive functions which uses UDAF interface */
-private[hive] case class HiveUDAF(
-    funcWrapper: HiveFunctionWrapper,
-    children: Seq[Expression]) extends AggregateExpression1
-  with HiveInspectors {
-
-  type UDFType = UDAF
-
-  @transient
-  protected lazy val resolver: AbstractGenericUDAFResolver =
-    new GenericUDAFBridge(funcWrapper.createFunction())
-
-  @transient
-  protected lazy val objectInspector = {
-    val parameterInfo = new SimpleGenericUDAFParameterInfo(inspectors.toArray, false, false)
-    resolver.getEvaluator(parameterInfo)
-      .init(GenericUDAFEvaluator.Mode.COMPLETE, inspectors.toArray)
-  }
-
-  @transient
-  protected lazy val inspectors = children.map(toInspector)
-
-  def dataType: DataType = inspectorToDataType(objectInspector)
-
-  def nullable: Boolean = true
-
-  override def toString: String = {
-    s"$nodeName#${funcWrapper.functionClassName}(${children.mkString(",")})"
-  }
-
-  def newInstance(): HiveUDAFFunction = new HiveUDAFFunction(funcWrapper, children, this, true)
-}
-
 /**
  * Converts a Hive Generic User Defined Table Generating Function (UDTF) to a
  * [[Generator]].  Note that the semantics of Generators do not allow
@@ -584,49 +522,86 @@ private[hive] case class HiveGenericUDTF(
   }
 }
 
+/**
+ * Currently we don't support partial aggregation for queries using Hive UDAF, which may hurt
+ * performance a lot.
+ */
 private[hive] case class HiveUDAFFunction(
     funcWrapper: HiveFunctionWrapper,
-    exprs: Seq[Expression],
-    base: AggregateExpression1,
+    children: Seq[Expression],
     isUDAFBridgeRequired: Boolean = false)
-  extends AggregateFunction1
-  with HiveInspectors {
+  extends AggregateFunction2 with HiveInspectors {
 
-  def this() = this(null, null, null)
+  def this() = this(null, null)
 
-  private val resolver =
+  @transient
+  private lazy val resolver =
     if (isUDAFBridgeRequired) {
       new GenericUDAFBridge(funcWrapper.createFunction[UDAF]())
     } else {
       funcWrapper.createFunction[AbstractGenericUDAFResolver]()
     }
 
-  private val inspectors = exprs.map(toInspector).toArray
+  @transient
+  private lazy val inspectors = children.map(toInspector).toArray
 
-  private val function = {
+  @transient
+  private lazy val functionAndInspector = {
     val parameterInfo = new SimpleGenericUDAFParameterInfo(inspectors, false, false)
-    resolver.getEvaluator(parameterInfo)
+    val f = resolver.getEvaluator(parameterInfo)
+    f -> f.init(GenericUDAFEvaluator.Mode.COMPLETE, inspectors)
   }
 
-  private val returnInspector = function.init(GenericUDAFEvaluator.Mode.COMPLETE, inspectors)
+  @transient
+  private lazy val function = functionAndInspector._1
+
+  @transient
+  private lazy val returnInspector = functionAndInspector._2
 
-  private val buffer =
-    function.getNewAggregationBuffer
+  @transient
+  private[this] var buffer: GenericUDAFEvaluator.AggregationBuffer = _
 
   override def eval(input: InternalRow): Any = unwrap(function.evaluate(buffer), returnInspector)
 
   @transient
-  val inputProjection = new InterpretedProjection(exprs)
+  private lazy val inputProjection = new InterpretedProjection(children)
 
   @transient
-  protected lazy val cached = new Array[AnyRef](exprs.length)
+  private lazy val cached = new Array[AnyRef](children.length)
 
   @transient
-  private lazy val inputDataTypes: Array[DataType] = exprs.map(_.dataType).toArray
+  private lazy val inputDataTypes: Array[DataType] = children.map(_.dataType).toArray
+
+  // Hive UDAF has its own buffer, so we don't need to occupy a slot in the aggregation
+  // buffer for it.
+  override def bufferSchema: StructType = StructType(Nil)
 
-  def update(input: InternalRow): Unit = {
+  override def update(_buffer: MutableRow, input: InternalRow): Unit = {
     val inputs = inputProjection(input)
     function.iterate(buffer, wrap(inputs, inspectors, cached, inputDataTypes))
   }
+
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    throw new UnsupportedOperationException(
+      "Hive UDAF doesn't support partial aggregate")
+  }
+
+  override def cloneBufferAttributes: Seq[Attribute] = Nil
+
+  override def initialize(_buffer: MutableRow): Unit = {
+    buffer = function.getNewAggregationBuffer
+  }
+
+  override def bufferAttributes: Seq[AttributeReference] = Nil
+
+  // We rely on Hive to check the input data types, so use `AnyDataType` here to bypass our
+  // catalyst type checking framework.
+  override def inputTypes: Seq[AbstractDataType] = children.map(_ => AnyDataType)
+
+  override def nullable: Boolean = true
+
+  override def supportsPartial: Boolean = false
+
+  override lazy val dataType: DataType = inspectorToDataType(returnInspector)
 }
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
index d9ba895e1ece..3c8a0091c83e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
@@ -131,7 +131,7 @@ class HiveUDFSuite extends QueryTest with TestHiveSingleton {
     hiveContext.setConf(SQLConf.CODEGEN_ENABLED, codegenDefault)
   }
 
-  test("SPARK-6409 UDAFAverage test") {
+  test("SPARK-6409 UDAF Average test") {
     sql(s"CREATE TEMPORARY FUNCTION test_avg AS '${classOf[GenericUDAFAverage].getName}'")
     checkAnswer(
       sql("SELECT test_avg(1), test_avg(substr(value,5)) FROM src"),

From b3862d3c59746ffb5f089aea4ff9e6f033a2c658 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Thu, 24 Sep 2015 12:52:11 -0700
Subject: [PATCH 096/896] [SPARK-10705] [SQL] Avoid using external rows in
 DataFrame.toJSON

JIRA: https://issues.apache.org/jira/browse/SPARK-10705

As described in the JIRA ticket, `DataFrame.toJSON` uses `DataFrame.mapPartitions`, which converts internal rows to external rows. We should use `queryExecution.toRdd.mapPartitions` that directly uses internal rows for better performance.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8865 from viirya/df-tojson-internalrow.
---
 .../org/apache/spark/sql/DataFrame.scala      |  2 +-
 .../datasources/json/JSONRelation.scala       |  2 +-
 .../datasources/json/JacksonGenerator.scala   | 84 +------------------
 3 files changed, 3 insertions(+), 85 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index a11140b71736..f9995da3a85e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1564,7 +1564,7 @@ class DataFrame private[sql](
    */
   def toJSON: RDD[String] = {
     val rowSchema = this.schema
-    this.mapPartitions { iter =>
+    queryExecution.toRdd.mapPartitions { iter =>
       val writer = new CharArrayWriter()
       // create the Generator without separator inserted between 2 records
       val gen = new JsonFactory().createGenerator(writer).setRootValueSeparator(null)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index 8ee0127c3bde..d05e6efa83c8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -182,7 +182,7 @@ private[json] class JsonOutputWriter(
   override def write(row: Row): Unit = throw new UnsupportedOperationException("call writeInternal")
 
   override protected[sql] def writeInternal(row: InternalRow): Unit = {
-    JacksonGenerator(dataSchema, gen, row)
+    JacksonGenerator(dataSchema, gen)(row)
     gen.flush()
 
     result.set(writer.toString)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
index 23bada1ddd92..d7d6edeb6c6d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
@@ -28,88 +28,6 @@ import org.apache.spark.sql.Row
 import org.apache.spark.sql.types._
 
 private[sql] object JacksonGenerator {
-  /** Transforms a single Row to JSON using Jackson
-    *
-    * @param rowSchema the schema object used for conversion
-    * @param gen a JsonGenerator object
-    * @param row The row to convert
-    */
-  def apply(rowSchema: StructType, gen: JsonGenerator)(row: Row): Unit = {
-    def valWriter: (DataType, Any) => Unit = {
-      case (_, null) | (NullType, _) => gen.writeNull()
-      case (StringType, v: String) => gen.writeString(v)
-      case (TimestampType, v: java.sql.Timestamp) => gen.writeString(v.toString)
-      case (IntegerType, v: Int) => gen.writeNumber(v)
-      case (ShortType, v: Short) => gen.writeNumber(v)
-      case (FloatType, v: Float) => gen.writeNumber(v)
-      case (DoubleType, v: Double) => gen.writeNumber(v)
-      case (LongType, v: Long) => gen.writeNumber(v)
-      case (DecimalType(), v: java.math.BigDecimal) => gen.writeNumber(v)
-      case (ByteType, v: Byte) => gen.writeNumber(v.toInt)
-      case (BinaryType, v: Array[Byte]) => gen.writeBinary(v)
-      case (BooleanType, v: Boolean) => gen.writeBoolean(v)
-      case (DateType, v) => gen.writeString(v.toString)
-      case (udt: UserDefinedType[_], v) => valWriter(udt.sqlType, udt.serialize(v))
-
-      case (ArrayType(ty, _), v: Seq[_]) =>
-        gen.writeStartArray()
-        v.foreach(valWriter(ty, _))
-        gen.writeEndArray()
-
-      case (MapType(kv, vv, _), v: Map[_, _]) =>
-        gen.writeStartObject()
-        v.foreach { p =>
-          gen.writeFieldName(p._1.toString)
-          valWriter(vv, p._2)
-        }
-        gen.writeEndObject()
-
-      case (StructType(ty), v: Row) =>
-        gen.writeStartObject()
-        ty.zip(v.toSeq).foreach {
-          case (_, null) =>
-          case (field, v) =>
-            gen.writeFieldName(field.name)
-            valWriter(field.dataType, v)
-        }
-        gen.writeEndObject()
-
-      // For UDT, udt.serialize will produce SQL types. So, we need the following three cases.
-      case (ArrayType(ty, _), v: ArrayData) =>
-        gen.writeStartArray()
-        v.foreach(ty, (_, value) => valWriter(ty, value))
-        gen.writeEndArray()
-
-      case (MapType(kt, vt, _), v: MapData) =>
-        gen.writeStartObject()
-        v.foreach(kt, vt, { (k, v) =>
-          gen.writeFieldName(k.toString)
-          valWriter(vt, v)
-        })
-        gen.writeEndObject()
-
-      case (StructType(ty), v: InternalRow) =>
-        gen.writeStartObject()
-        var i = 0
-        while (i < ty.length) {
-          val field = ty(i)
-          val value = v.get(i, field.dataType)
-          if (value != null) {
-            gen.writeFieldName(field.name)
-            valWriter(field.dataType, value)
-          }
-          i += 1
-        }
-        gen.writeEndObject()
-
-      case (dt, v) =>
-        sys.error(
-          s"Failed to convert value $v (class of ${v.getClass}}) with the type of $dt to JSON.")
-    }
-
-    valWriter(rowSchema, row)
-  }
-
   /** Transforms a single InternalRow to JSON using Jackson
    *
    * TODO: make the code shared with the other apply method.
@@ -118,7 +36,7 @@ private[sql] object JacksonGenerator {
    * @param gen a JsonGenerator object
    * @param row The row to convert
    */
-  def apply(rowSchema: StructType, gen: JsonGenerator, row: InternalRow): Unit = {
+  def apply(rowSchema: StructType, gen: JsonGenerator)(row: InternalRow): Unit = {
     def valWriter: (DataType, Any) => Unit = {
       case (_, null) | (NullType, _) => gen.writeNull()
       case (StringType, v) => gen.writeString(v.toString)

From 8023242e77e4a799de6edc490078285684549b6d Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Thu, 24 Sep 2015 14:18:33 -0700
Subject: [PATCH 097/896] [SPARK-10761] Refactor DiskBlockObjectWriter to not
 require BlockId

The DiskBlockObjectWriter constructor took a BlockId parameter but never used it. As part of some general cleanup in these interfaces, this patch refactors its constructor to eliminate this parameter.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8871 from JoshRosen/disk-block-object-writer-blockid-cleanup.
---
 .../sort/BypassMergeSortShuffleWriter.java    |  9 +++--
 .../shuffle/IndexShuffleBlockResolver.scala   |  3 +-
 .../apache/spark/storage/BlockManager.scala   |  2 +-
 .../spark/storage/DiskBlockObjectWriter.scala |  7 ++--
 .../unsafe/UnsafeShuffleWriterSuite.java      |  1 -
 .../sort/UnsafeExternalSorterSuite.java       |  1 -
 .../BypassMergeSortShuffleWriterSuite.scala   |  1 -
 .../storage/DiskBlockObjectWriterSuite.scala  | 33 +++++++++----------
 8 files changed, 27 insertions(+), 30 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
index 0b8b604e1849..f5d80bbcf355 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
@@ -151,7 +151,7 @@ public long[] writePartitionedFile(
         } finally {
           Closeables.close(in, copyThrewException);
         }
-        if (!blockManager.diskBlockManager().getFile(partitionWriters[i].blockId()).delete()) {
+        if (!partitionWriters[i].fileSegment().file().delete()) {
           logger.error("Unable to delete file for partition {}", i);
         }
       }
@@ -168,12 +168,11 @@ public long[] writePartitionedFile(
   public void stop() throws IOException {
     if (partitionWriters != null) {
       try {
-        final DiskBlockManager diskBlockManager = blockManager.diskBlockManager();
         for (DiskBlockObjectWriter writer : partitionWriters) {
           // This method explicitly does _not_ throw exceptions:
-          writer.revertPartialWritesAndClose();
-          if (!diskBlockManager.getFile(writer.blockId()).delete()) {
-            logger.error("Error while deleting file for block {}", writer.blockId());
+          File file = writer.revertPartialWritesAndClose();
+          if (!file.delete()) {
+            logger.error("Error while deleting file {}", file.getAbsolutePath());
           }
         }
       } finally {
diff --git a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
index 65887d119d65..5e4c2b5d0a5c 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
@@ -119,9 +119,8 @@ private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleB
 }
 
 private[spark] object IndexShuffleBlockResolver {
-  // No-op reduce ID used in interactions with disk store and DiskBlockObjectWriter.
+  // No-op reduce ID used in interactions with disk store.
   // The disk store currently expects puts to relate to a (map, reduce) pair, but in the sort
   // shuffle outputs for several reduces are glommed into a single file.
-  // TODO: Avoid this entirely by having the DiskBlockObjectWriter not require a BlockId.
   val NOOP_REDUCE_ID = 0
 }
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index bca3942f8c55..47bd2ef8b294 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -669,7 +669,7 @@ private[spark] class BlockManager(
       writeMetrics: ShuffleWriteMetrics): DiskBlockObjectWriter = {
     val compressStream: OutputStream => OutputStream = wrapForCompression(blockId, _)
     val syncWrites = conf.getBoolean("spark.shuffle.sync", false)
-    new DiskBlockObjectWriter(blockId, file, serializerInstance, bufferSize, compressStream,
+    new DiskBlockObjectWriter(file, serializerInstance, bufferSize, compressStream,
       syncWrites, writeMetrics)
   }
 
diff --git a/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala b/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
index 49d9154f95a5..80d426fadc65 100644
--- a/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
+++ b/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
@@ -34,7 +34,6 @@ import org.apache.spark.util.Utils
  * reopened again.
  */
 private[spark] class DiskBlockObjectWriter(
-    val blockId: BlockId,
     file: File,
     serializerInstance: SerializerInstance,
     bufferSize: Int,
@@ -144,8 +143,10 @@ private[spark] class DiskBlockObjectWriter(
    * Reverts writes that haven't been flushed yet. Callers should invoke this function
    * when there are runtime exceptions. This method will not throw, though it may be
    * unsuccessful in truncating written data.
+   *
+   * @return the file that this DiskBlockObjectWriter wrote to.
    */
-  def revertPartialWritesAndClose() {
+  def revertPartialWritesAndClose(): File = {
     // Discard current writes. We do this by flushing the outstanding writes and then
     // truncating the file to its initial position.
     try {
@@ -160,12 +161,14 @@ private[spark] class DiskBlockObjectWriter(
       val truncateStream = new FileOutputStream(file, true)
       try {
         truncateStream.getChannel.truncate(initialPosition)
+        file
       } finally {
         truncateStream.close()
       }
     } catch {
       case e: Exception =>
         logError("Uncaught exception while reverting partial writes to file " + file, e)
+        file
     }
   }
 
diff --git a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java
index a266b0c36e0f..d218344cd452 100644
--- a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java
@@ -129,7 +129,6 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
         Object[] args = invocationOnMock.getArguments();
 
         return new DiskBlockObjectWriter(
-          (BlockId) args[0],
           (File) args[1],
           (SerializerInstance) args[2],
           (Integer) args[3],
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
index 445a37b83e98..a5bbaa95fa45 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
@@ -127,7 +127,6 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
         Object[] args = invocationOnMock.getArguments();
 
         return new DiskBlockObjectWriter(
-          (BlockId) args[0],
           (File) args[1],
           (SerializerInstance) args[2],
           (Integer) args[3],
diff --git a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
index cc7342f1ecd7..341f56df2daf 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
@@ -72,7 +72,6 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
       override def answer(invocation: InvocationOnMock): DiskBlockObjectWriter = {
         val args = invocation.getArguments
         new DiskBlockObjectWriter(
-          args(0).asInstanceOf[BlockId],
           args(1).asInstanceOf[File],
           args(2).asInstanceOf[SerializerInstance],
           args(3).asInstanceOf[Int],
diff --git a/core/src/test/scala/org/apache/spark/storage/DiskBlockObjectWriterSuite.scala b/core/src/test/scala/org/apache/spark/storage/DiskBlockObjectWriterSuite.scala
index 66af6e1a7974..7c19531c1880 100644
--- a/core/src/test/scala/org/apache/spark/storage/DiskBlockObjectWriterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/DiskBlockObjectWriterSuite.scala
@@ -20,7 +20,6 @@ import java.io.File
 
 import org.scalatest.BeforeAndAfterEach
 
-import org.apache.spark.SparkConf
 import org.apache.spark.{SparkConf, SparkFunSuite}
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.serializer.JavaSerializer
@@ -41,8 +40,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("verify write metrics") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
 
     writer.write(Long.box(20), Long.box(30))
     // Record metrics update on every write
@@ -63,8 +62,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("verify write metrics on revert") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
 
     writer.write(Long.box(20), Long.box(30))
     // Record metrics update on every write
@@ -86,8 +85,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("Reopening a closed block writer") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
 
     writer.open()
     writer.close()
@@ -99,8 +98,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("calling revertPartialWritesAndClose() on a closed block writer should have no effect") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
     for (i <- 1 to 1000) {
       writer.write(i, i)
     }
@@ -115,8 +114,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("commitAndClose() should be idempotent") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
     for (i <- 1 to 1000) {
       writer.write(i, i)
     }
@@ -133,8 +132,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("revertPartialWritesAndClose() should be idempotent") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
     for (i <- 1 to 1000) {
       writer.write(i, i)
     }
@@ -151,8 +150,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("fileSegment() can only be called after commitAndClose() has been called") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
     for (i <- 1 to 1000) {
       writer.write(i, i)
     }
@@ -165,8 +164,8 @@ class DiskBlockObjectWriterSuite extends SparkFunSuite with BeforeAndAfterEach {
   test("commitAndClose() without ever opening or writing") {
     val file = new File(tempDir, "somefile")
     val writeMetrics = new ShuffleWriteMetrics()
-    val writer = new DiskBlockObjectWriter(new TestBlockId("0"), file,
-      new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
+    val writer = new DiskBlockObjectWriter(
+      file, new JavaSerializer(new SparkConf()).newInstance(), 1024, os => os, true, writeMetrics)
     writer.commitAndClose()
     assert(writer.fileSegment().length === 0)
   }

From 21fd12cb17b9e08a0cc49b4fda801af947a4183b Mon Sep 17 00:00:00 2001
From: Matei Zaharia <matei@databricks.com>
Date: Thu, 24 Sep 2015 23:39:04 -0400
Subject: [PATCH 098/896] [SPARK-9852] Let reduce tasks fetch multiple map
 output partitions

This makes two changes:

- Allow reduce tasks to fetch multiple map output partitions -- this is a pretty small change to HashShuffleFetcher
- Move shuffle locality computation out of DAGScheduler and into ShuffledRDD / MapOutputTracker; this was needed because the code in DAGScheduler wouldn't work for RDDs that fetch multiple map output partitions from each reduce task

I also added an AdaptiveSchedulingSuite that creates RDDs depending on multiple map output partitions.

Author: Matei Zaharia <matei@databricks.com>

Closes #8844 from mateiz/spark-9852.
---
 .../org/apache/spark/MapOutputTracker.scala   |  79 ++++++++--
 .../org/apache/spark/rdd/ShuffledRDD.scala    |   6 +
 .../apache/spark/scheduler/DAGScheduler.scala |  33 +----
 .../shuffle/BlockStoreShuffleReader.scala     |   9 +-
 .../scheduler/AdaptiveSchedulingSuite.scala   |  47 +++---
 .../spark/scheduler/CustomShuffledRDD.scala   | 111 ++++++++++++++
 .../spark/scheduler/DAGSchedulerSuite.scala   | 137 ++++++++++--------
 .../BlockStoreShuffleReaderSuite.scala        |   2 +-
 .../spark/sql/execution/ShuffledRowRDD.scala  |   6 +
 9 files changed, 306 insertions(+), 124 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/scheduler/CustomShuffledRDD.scala

diff --git a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
index 94eb8daa85c5..e4cb72e39d7e 100644
--- a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
+++ b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
@@ -134,11 +134,25 @@ private[spark] abstract class MapOutputTracker(conf: SparkConf) extends Logging
    */
   def getMapSizesByExecutorId(shuffleId: Int, reduceId: Int)
       : Seq[(BlockManagerId, Seq[(BlockId, Long)])] = {
-    logDebug(s"Fetching outputs for shuffle $shuffleId, reduce $reduceId")
+    getMapSizesByExecutorId(shuffleId, reduceId, reduceId + 1)
+  }
+
+  /**
+   * Called from executors to get the server URIs and output sizes for each shuffle block that
+   * needs to be read from a given range of map output partitions (startPartition is included but
+   * endPartition is excluded from the range).
+   *
+   * @return A sequence of 2-item tuples, where the first item in the tuple is a BlockManagerId,
+   *         and the second item is a sequence of (shuffle block id, shuffle block size) tuples
+   *         describing the shuffle blocks that are stored at that block manager.
+   */
+  def getMapSizesByExecutorId(shuffleId: Int, startPartition: Int, endPartition: Int)
+      : Seq[(BlockManagerId, Seq[(BlockId, Long)])] = {
+    logDebug(s"Fetching outputs for shuffle $shuffleId, partitions $startPartition-$endPartition")
     val statuses = getStatuses(shuffleId)
     // Synchronize on the returned array because, on the driver, it gets mutated in place
     statuses.synchronized {
-      return MapOutputTracker.convertMapStatuses(shuffleId, reduceId, statuses)
+      return MapOutputTracker.convertMapStatuses(shuffleId, startPartition, endPartition, statuses)
     }
   }
 
@@ -262,6 +276,21 @@ private[spark] class MapOutputTrackerMaster(conf: SparkConf)
   /** Cache a serialized version of the output statuses for each shuffle to send them out faster */
   private var cacheEpoch = epoch
 
+  /** Whether to compute locality preferences for reduce tasks */
+  private val shuffleLocalityEnabled = conf.getBoolean("spark.shuffle.reduceLocality.enabled", true)
+
+  // Number of map and reduce tasks above which we do not assign preferred locations based on map
+  // output sizes. We limit the size of jobs for which assign preferred locations as computing the
+  // top locations by size becomes expensive.
+  private val SHUFFLE_PREF_MAP_THRESHOLD = 1000
+  // NOTE: This should be less than 2000 as we use HighlyCompressedMapStatus beyond that
+  private val SHUFFLE_PREF_REDUCE_THRESHOLD = 1000
+
+  // Fraction of total map output that must be at a location for it to considered as a preferred
+  // location for a reduce task. Making this larger will focus on fewer locations where most data
+  // can be read locally, but may lead to more delay in scheduling if those locations are busy.
+  private val REDUCER_PREF_LOCS_FRACTION = 0.2
+
   /**
    * Timestamp based HashMap for storing mapStatuses and cached serialized statuses in the driver,
    * so that statuses are dropped only by explicit de-registering or by TTL-based cleaning (if set).
@@ -322,6 +351,30 @@ private[spark] class MapOutputTrackerMaster(conf: SparkConf)
     cachedSerializedStatuses.contains(shuffleId) || mapStatuses.contains(shuffleId)
   }
 
+  /**
+   * Return the preferred hosts on which to run the given map output partition in a given shuffle,
+   * i.e. the nodes that the most outputs for that partition are on.
+   *
+   * @param dep shuffle dependency object
+   * @param partitionId map output partition that we want to read
+   * @return a sequence of host names
+   */
+  def getPreferredLocationsForShuffle(dep: ShuffleDependency[_, _, _], partitionId: Int)
+      : Seq[String] = {
+    if (shuffleLocalityEnabled && dep.rdd.partitions.length < SHUFFLE_PREF_MAP_THRESHOLD &&
+        dep.partitioner.numPartitions < SHUFFLE_PREF_REDUCE_THRESHOLD) {
+      val blockManagerIds = getLocationsWithLargestOutputs(dep.shuffleId, partitionId,
+        dep.partitioner.numPartitions, REDUCER_PREF_LOCS_FRACTION)
+      if (blockManagerIds.nonEmpty) {
+        blockManagerIds.get.map(_.host)
+      } else {
+        Nil
+      }
+    } else {
+      Nil
+    }
+  }
+
   /**
    * Return a list of locations that each have fraction of map output greater than the specified
    * threshold.
@@ -460,23 +513,25 @@ private[spark] object MapOutputTracker extends Logging {
   }
 
   /**
-   * Converts an array of MapStatuses for a given reduce ID to a sequence that, for each block
-   * manager ID, lists the shuffle block ids and corresponding shuffle block sizes stored at that
-   * block manager.
+   * Given an array of map statuses and a range of map output partitions, returns a sequence that,
+   * for each block manager ID, lists the shuffle block IDs and corresponding shuffle block sizes
+   * stored at that block manager.
    *
    * If any of the statuses is null (indicating a missing location due to a failed mapper),
    * throws a FetchFailedException.
    *
    * @param shuffleId Identifier for the shuffle
-   * @param reduceId Identifier for the reduce task
+   * @param startPartition Start of map output partition ID range (included in range)
+   * @param endPartition End of map output partition ID range (excluded from range)
    * @param statuses List of map statuses, indexed by map ID.
    * @return A sequence of 2-item tuples, where the first item in the tuple is a BlockManagerId,
-   *         and the second item is a sequence of (shuffle block id, shuffle block size) tuples
+   *         and the second item is a sequence of (shuffle block ID, shuffle block size) tuples
    *         describing the shuffle blocks that are stored at that block manager.
    */
   private def convertMapStatuses(
       shuffleId: Int,
-      reduceId: Int,
+      startPartition: Int,
+      endPartition: Int,
       statuses: Array[MapStatus]): Seq[(BlockManagerId, Seq[(BlockId, Long)])] = {
     assert (statuses != null)
     val splitsByAddress = new HashMap[BlockManagerId, ArrayBuffer[(BlockId, Long)]]
@@ -484,10 +539,12 @@ private[spark] object MapOutputTracker extends Logging {
       if (status == null) {
         val errorMessage = s"Missing an output location for shuffle $shuffleId"
         logError(errorMessage)
-        throw new MetadataFetchFailedException(shuffleId, reduceId, errorMessage)
+        throw new MetadataFetchFailedException(shuffleId, startPartition, errorMessage)
       } else {
-        splitsByAddress.getOrElseUpdate(status.location, ArrayBuffer()) +=
-          ((ShuffleBlockId(shuffleId, mapId, reduceId), status.getSizeForBlock(reduceId)))
+        for (part <- startPartition until endPartition) {
+          splitsByAddress.getOrElseUpdate(status.location, ArrayBuffer()) +=
+            ((ShuffleBlockId(shuffleId, mapId, part), status.getSizeForBlock(part)))
+        }
       }
     }
 
diff --git a/core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala b/core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala
index cb15d912bbfb..a013c3f66a3a 100644
--- a/core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/ShuffledRDD.scala
@@ -86,6 +86,12 @@ class ShuffledRDD[K: ClassTag, V: ClassTag, C: ClassTag](
     Array.tabulate[Partition](part.numPartitions)(i => new ShuffledRDDPartition(i))
   }
 
+  override def getPreferredLocations(partition: Partition): Seq[String] = {
+    val tracker = SparkEnv.get.mapOutputTracker.asInstanceOf[MapOutputTrackerMaster]
+    val dep = dependencies.head.asInstanceOf[ShuffleDependency[K, V, C]]
+    tracker.getPreferredLocationsForShuffle(dep, partition.index)
+  }
+
   override def compute(split: Partition, context: TaskContext): Iterator[(K, C)] = {
     val dep = dependencies.head.asInstanceOf[ShuffleDependency[K, V, C]]
     SparkEnv.get.shuffleManager.getReader(dep.shuffleHandle, split.index, split.index + 1, context)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 394228b2728d..ade372be092a 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -184,22 +184,6 @@ class DAGScheduler(
   private[scheduler] val eventProcessLoop = new DAGSchedulerEventProcessLoop(this)
   taskScheduler.setDAGScheduler(this)
 
-  // Flag to control if reduce tasks are assigned preferred locations
-  private val shuffleLocalityEnabled =
-    sc.getConf.getBoolean("spark.shuffle.reduceLocality.enabled", true)
-  // Number of map, reduce tasks above which we do not assign preferred locations
-  // based on map output sizes. We limit the size of jobs for which assign preferred locations
-  // as computing the top locations by size becomes expensive.
-  private[this] val SHUFFLE_PREF_MAP_THRESHOLD = 1000
-  // NOTE: This should be less than 2000 as we use HighlyCompressedMapStatus beyond that
-  private[this] val SHUFFLE_PREF_REDUCE_THRESHOLD = 1000
-
-  // Fraction of total map output that must be at a location for it to considered as a preferred
-  // location for a reduce task.
-  // Making this larger will focus on fewer locations where most data can be read locally, but
-  // may lead to more delay in scheduling if those locations are busy.
-  private[scheduler] val REDUCER_PREF_LOCS_FRACTION = 0.2
-
   /**
    * Called by the TaskSetManager to report task's starting.
    */
@@ -1570,25 +1554,10 @@ class DAGScheduler(
             return locs
           }
         }
+
       case _ =>
     }
 
-    // If the RDD has shuffle dependencies and shuffle locality is enabled, pick locations that
-    // have at least REDUCER_PREF_LOCS_FRACTION of data as preferred locations
-    if (shuffleLocalityEnabled && rdd.partitions.length < SHUFFLE_PREF_REDUCE_THRESHOLD) {
-      rdd.dependencies.foreach {
-        case s: ShuffleDependency[_, _, _] =>
-          if (s.rdd.partitions.length < SHUFFLE_PREF_MAP_THRESHOLD) {
-            // Get the preferred map output locations for this reducer
-            val topLocsForReducer = mapOutputTracker.getLocationsWithLargestOutputs(s.shuffleId,
-              partition, rdd.partitions.length, REDUCER_PREF_LOCS_FRACTION)
-            if (topLocsForReducer.nonEmpty) {
-              return topLocsForReducer.get.map(loc => TaskLocation(loc.host, loc.executorId))
-            }
-          }
-        case _ =>
-      }
-    }
     Nil
   }
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
index 6dc9a16e5853..7c3e2b5a3703 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
@@ -23,6 +23,10 @@ import org.apache.spark.storage.{BlockManager, ShuffleBlockFetcherIterator}
 import org.apache.spark.util.CompletionIterator
 import org.apache.spark.util.collection.ExternalSorter
 
+/**
+ * Fetches and reads the partitions in range [startPartition, endPartition) from a shuffle by
+ * requesting them from other nodes' block stores.
+ */
 private[spark] class BlockStoreShuffleReader[K, C](
     handle: BaseShuffleHandle[K, _, C],
     startPartition: Int,
@@ -32,9 +36,6 @@ private[spark] class BlockStoreShuffleReader[K, C](
     mapOutputTracker: MapOutputTracker = SparkEnv.get.mapOutputTracker)
   extends ShuffleReader[K, C] with Logging {
 
-  require(endPartition == startPartition + 1,
-    "Hash shuffle currently only supports fetching one partition")
-
   private val dep = handle.dependency
 
   /** Read the combined key-values for this reduce task */
@@ -43,7 +44,7 @@ private[spark] class BlockStoreShuffleReader[K, C](
       context,
       blockManager.shuffleClient,
       blockManager,
-      mapOutputTracker.getMapSizesByExecutorId(handle.shuffleId, startPartition),
+      mapOutputTracker.getMapSizesByExecutorId(handle.shuffleId, startPartition, endPartition),
       // Note: we use getSizeAsMb when no suffix is provided for backwards compatibility
       SparkEnv.get.conf.getSizeAsMb("spark.reducer.maxSizeInFlight", "48m") * 1024 * 1024)
 
diff --git a/core/src/test/scala/org/apache/spark/scheduler/AdaptiveSchedulingSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/AdaptiveSchedulingSuite.scala
index 3fe28027c3c2..e0f474aa505c 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/AdaptiveSchedulingSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/AdaptiveSchedulingSuite.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.scheduler
 
-import org.apache.spark.rdd.{ShuffledRDDPartition, RDD, ShuffledRDD}
 import org.apache.spark._
 
 object AdaptiveSchedulingSuiteState {
@@ -28,26 +27,10 @@ object AdaptiveSchedulingSuiteState {
   }
 }
 
-/** A special ShuffledRDD where we can pass a ShuffleDependency object to use */
-class CustomShuffledRDD[K, V, C](@transient dep: ShuffleDependency[K, V, C])
-  extends RDD[(K, C)](dep.rdd.context, Seq(dep)) {
-
-  override def compute(split: Partition, context: TaskContext): Iterator[(K, C)] = {
-    val dep = dependencies.head.asInstanceOf[ShuffleDependency[K, V, C]]
-    SparkEnv.get.shuffleManager.getReader(dep.shuffleHandle, split.index, split.index + 1, context)
-      .read()
-      .asInstanceOf[Iterator[(K, C)]]
-  }
-
-  override def getPartitions: Array[Partition] = {
-    Array.tabulate[Partition](dep.partitioner.numPartitions)(i => new ShuffledRDDPartition(i))
-  }
-}
-
 class AdaptiveSchedulingSuite extends SparkFunSuite with LocalSparkContext {
   test("simple use of submitMapStage") {
     try {
-      sc = new SparkContext("local[1,2]", "test")
+      sc = new SparkContext("local", "test")
       val rdd = sc.parallelize(1 to 3, 3).map { x =>
         AdaptiveSchedulingSuiteState.tasksRun += 1
         (x, x)
@@ -62,4 +45,32 @@ class AdaptiveSchedulingSuite extends SparkFunSuite with LocalSparkContext {
       AdaptiveSchedulingSuiteState.clear()
     }
   }
+
+  test("fetching multiple map output partitions per reduce") {
+    sc = new SparkContext("local", "test")
+    val rdd = sc.parallelize(0 to 2, 3).map(x => (x, x))
+    val dep = new ShuffleDependency[Int, Int, Int](rdd, new HashPartitioner(3))
+    val shuffled = new CustomShuffledRDD[Int, Int, Int](dep, Array(0, 2))
+    assert(shuffled.partitions.length === 2)
+    assert(shuffled.glom().map(_.toSet).collect().toSet == Set(Set((0, 0), (1, 1)), Set((2, 2))))
+  }
+
+  test("fetching all map output partitions in one reduce") {
+    sc = new SparkContext("local", "test")
+    val rdd = sc.parallelize(0 to 2, 3).map(x => (x, x))
+    // Also create lots of hash partitions so that some of them are empty
+    val dep = new ShuffleDependency[Int, Int, Int](rdd, new HashPartitioner(5))
+    val shuffled = new CustomShuffledRDD[Int, Int, Int](dep, Array(0))
+    assert(shuffled.partitions.length === 1)
+    assert(shuffled.collect().toSet == Set((0, 0), (1, 1), (2, 2)))
+  }
+
+  test("more reduce tasks than map output partitions") {
+    sc = new SparkContext("local", "test")
+    val rdd = sc.parallelize(0 to 2, 3).map(x => (x, x))
+    val dep = new ShuffleDependency[Int, Int, Int](rdd, new HashPartitioner(3))
+    val shuffled = new CustomShuffledRDD[Int, Int, Int](dep, Array(0, 0, 0, 1, 1, 1, 2))
+    assert(shuffled.partitions.length === 7)
+    assert(shuffled.collect().toSet == Set((0, 0), (1, 1), (2, 2)))
+  }
 }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/CustomShuffledRDD.scala b/core/src/test/scala/org/apache/spark/scheduler/CustomShuffledRDD.scala
new file mode 100644
index 000000000000..d8d818ceed45
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/scheduler/CustomShuffledRDD.scala
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.scheduler
+
+import java.util.Arrays
+
+import org.apache.spark._
+import org.apache.spark.rdd.RDD
+
+/**
+ * A Partitioner that might group together one or more partitions from the parent.
+ *
+ * @param parent a parent partitioner
+ * @param partitionStartIndices indices of partitions in parent that should create new partitions
+ *   in child (this should be an array of increasing partition IDs). For example, if we have a
+ *   parent with 5 partitions, and partitionStartIndices is [0, 2, 4], we get three output
+ *   partitions, corresponding to partition ranges [0, 1], [2, 3] and [4] of the parent partitioner.
+ */
+class CoalescedPartitioner(val parent: Partitioner, val partitionStartIndices: Array[Int])
+  extends Partitioner {
+
+  @transient private lazy val parentPartitionMapping: Array[Int] = {
+    val n = parent.numPartitions
+    val result = new Array[Int](n)
+    for (i <- 0 until partitionStartIndices.length) {
+      val start = partitionStartIndices(i)
+      val end = if (i < partitionStartIndices.length - 1) partitionStartIndices(i + 1) else n
+      for (j <- start until end) {
+        result(j) = i
+      }
+    }
+    result
+  }
+
+  override def numPartitions: Int = partitionStartIndices.size
+
+  override def getPartition(key: Any): Int = {
+    parentPartitionMapping(parent.getPartition(key))
+  }
+
+  override def equals(other: Any): Boolean = other match {
+    case c: CoalescedPartitioner =>
+      c.parent == parent && Arrays.equals(c.partitionStartIndices, partitionStartIndices)
+    case _ =>
+      false
+  }
+}
+
+private[spark] class CustomShuffledRDDPartition(
+    val index: Int, val startIndexInParent: Int, val endIndexInParent: Int)
+  extends Partition {
+
+  override def hashCode(): Int = index
+}
+
+/**
+ * A special ShuffledRDD that supports a ShuffleDependency object from outside and launching reduce
+ * tasks that read multiple map output partitions.
+ */
+class CustomShuffledRDD[K, V, C](
+    var dependency: ShuffleDependency[K, V, C],
+    partitionStartIndices: Array[Int])
+  extends RDD[(K, C)](dependency.rdd.context, Seq(dependency)) {
+
+  def this(dep: ShuffleDependency[K, V, C]) = {
+    this(dep, (0 until dep.partitioner.numPartitions).toArray)
+  }
+
+  override def getDependencies: Seq[Dependency[_]] = List(dependency)
+
+  override val partitioner = {
+    Some(new CoalescedPartitioner(dependency.partitioner, partitionStartIndices))
+  }
+
+  override def getPartitions: Array[Partition] = {
+    val n = dependency.partitioner.numPartitions
+    Array.tabulate[Partition](partitionStartIndices.length) { i =>
+      val startIndex = partitionStartIndices(i)
+      val endIndex = if (i < partitionStartIndices.length - 1) partitionStartIndices(i + 1) else n
+      new CustomShuffledRDDPartition(i, startIndex, endIndex)
+    }
+  }
+
+  override def compute(p: Partition, context: TaskContext): Iterator[(K, C)] = {
+    val part = p.asInstanceOf[CustomShuffledRDDPartition]
+    SparkEnv.get.shuffleManager.getReader(
+      dependency.shuffleHandle, part.startIndexInParent, part.endIndexInParent, context)
+      .read()
+      .asInstanceOf[Iterator[(K, C)]]
+  }
+
+  override def clearDependencies() {
+    super.clearDependencies()
+    dependency = null
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 6b5bcf0574de..697c195e4ad1 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -49,19 +49,39 @@ class DAGSchedulerEventProcessLoopTester(dagScheduler: DAGScheduler)
  * An RDD for passing to DAGScheduler. These RDDs will use the dependencies and
  * preferredLocations (if any) that are passed to them. They are deliberately not executable
  * so we can test that DAGScheduler does not try to execute RDDs locally.
+ *
+ * Optionally, one can pass in a list of locations to use as preferred locations for each task,
+ * and a MapOutputTrackerMaster to enable reduce task locality. We pass the tracker separately
+ * because, in this test suite, it won't be the same as sc.env.mapOutputTracker.
  */
 class MyRDD(
     sc: SparkContext,
     numPartitions: Int,
     dependencies: List[Dependency[_]],
-    locations: Seq[Seq[String]] = Nil) extends RDD[(Int, Int)](sc, dependencies) with Serializable {
+    locations: Seq[Seq[String]] = Nil,
+    @transient tracker: MapOutputTrackerMaster = null)
+  extends RDD[(Int, Int)](sc, dependencies) with Serializable {
+
   override def compute(split: Partition, context: TaskContext): Iterator[(Int, Int)] =
     throw new RuntimeException("should not be reached")
+
   override def getPartitions: Array[Partition] = (0 until numPartitions).map(i => new Partition {
     override def index: Int = i
   }).toArray
-  override def getPreferredLocations(split: Partition): Seq[String] =
-    if (locations.isDefinedAt(split.index)) locations(split.index) else Nil
+
+  override def getPreferredLocations(partition: Partition): Seq[String] = {
+    if (locations.isDefinedAt(partition.index)) {
+      locations(partition.index)
+    } else if (tracker != null && dependencies.size == 1 &&
+        dependencies(0).isInstanceOf[ShuffleDependency[_, _, _]]) {
+      // If we have only one shuffle dependency, use the same code path as ShuffledRDD for locality
+      val dep = dependencies(0).asInstanceOf[ShuffleDependency[_, _, _]]
+      tracker.getPreferredLocationsForShuffle(dep, partition.index)
+    } else {
+      Nil
+    }
+  }
+
   override def toString: String = "DAGSchedulerSuiteRDD " + id
 }
 
@@ -351,7 +371,8 @@ class DAGSchedulerSuite
    */
   test("getMissingParentStages should consider all ancestor RDDs' cache statuses") {
     val rddA = new MyRDD(sc, 1, Nil)
-    val rddB = new MyRDD(sc, 1, List(new ShuffleDependency(rddA, null)))
+    val rddB = new MyRDD(sc, 1, List(new ShuffleDependency(rddA, new HashPartitioner(1))),
+      tracker = mapOutputTracker)
     val rddC = new MyRDD(sc, 1, List(new OneToOneDependency(rddB))).cache()
     val rddD = new MyRDD(sc, 1, List(new OneToOneDependency(rddC)))
     cacheLocations(rddC.id -> 0) =
@@ -458,9 +479,9 @@ class DAGSchedulerSuite
 
   test("run trivial shuffle") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(1))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0))
     complete(taskSets(0), Seq(
         (Success, makeMapStatus("hostA", 1)),
@@ -474,9 +495,9 @@ class DAGSchedulerSuite
 
   test("run trivial shuffle with fetch failure") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
     complete(taskSets(0), Seq(
         (Success, makeMapStatus("hostA", reduceRdd.partitions.length)),
@@ -590,9 +611,8 @@ class DAGSchedulerSuite
 
     val parts = 8
     val shuffleMapRdd = new MyRDD(sc, parts, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
-    val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, parts, List(shuffleDep))
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(parts))
+    val reduceRdd = new MyRDD(sc, parts, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, (0 until parts).toArray)
 
     completeShuffleMapStageSuccessfully(0, 0, numShufflePartitions = parts)
@@ -625,9 +645,8 @@ class DAGSchedulerSuite
     setupStageAbortTest(sc)
 
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
-    val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
 
     for (attempt <- 0 until Stage.MAX_CONSECUTIVE_FETCH_FAILURES) {
@@ -668,10 +687,10 @@ class DAGSchedulerSuite
     setupStageAbortTest(sc)
 
     val shuffleOneRdd = new MyRDD(sc, 2, Nil).cache()
-    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, null)
-    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne)).cache()
-    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, null)
-    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo))
+    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, new HashPartitioner(2))
+    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne), tracker = mapOutputTracker).cache()
+    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, new HashPartitioner(1))
+    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo), tracker = mapOutputTracker)
     submit(finalRdd, Array(0))
 
     // In the first two iterations, Stage 0 succeeds and stage 1 fails. In the next two iterations,
@@ -717,10 +736,10 @@ class DAGSchedulerSuite
     setupStageAbortTest(sc)
 
     val shuffleOneRdd = new MyRDD(sc, 2, Nil).cache()
-    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, null)
-    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne)).cache()
-    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, null)
-    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo))
+    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, new HashPartitioner(2))
+    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne), tracker = mapOutputTracker).cache()
+    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, new HashPartitioner(1))
+    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo), tracker = mapOutputTracker)
     submit(finalRdd, Array(0))
 
     // First, execute stages 0 and 1, failing stage 1 up to MAX-1 times.
@@ -777,9 +796,9 @@ class DAGSchedulerSuite
 
   test("trivial shuffle with multiple fetch failures") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
     complete(taskSets(0), Seq(
       (Success, makeMapStatus("hostA", reduceRdd.partitions.length)),
@@ -818,9 +837,9 @@ class DAGSchedulerSuite
    */
   test("late fetch failures don't cause multiple concurrent attempts for the same map stage") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
 
     val mapStageId = 0
@@ -886,9 +905,9 @@ class DAGSchedulerSuite
   test("extremely late fetch failures don't cause multiple concurrent attempts for " +
       "the same stage") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
 
     def countSubmittedReduceStageAttempts(): Int = {
@@ -949,9 +968,9 @@ class DAGSchedulerSuite
 
   test("ignore late map task completions") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
 
     // pretend we were told hostA went away
@@ -1018,8 +1037,8 @@ class DAGSchedulerSuite
 
   test("run shuffle with map stage failure") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0, 1))
 
     // Fail the map stage.  This should cause the entire job to fail.
@@ -1221,12 +1240,12 @@ class DAGSchedulerSuite
    */
   test("failure of stage used by two jobs") {
     val shuffleMapRdd1 = new MyRDD(sc, 2, Nil)
-    val shuffleDep1 = new ShuffleDependency(shuffleMapRdd1, null)
+    val shuffleDep1 = new ShuffleDependency(shuffleMapRdd1, new HashPartitioner(2))
     val shuffleMapRdd2 = new MyRDD(sc, 2, Nil)
-    val shuffleDep2 = new ShuffleDependency(shuffleMapRdd2, null)
+    val shuffleDep2 = new ShuffleDependency(shuffleMapRdd2, new HashPartitioner(2))
 
-    val reduceRdd1 = new MyRDD(sc, 2, List(shuffleDep1))
-    val reduceRdd2 = new MyRDD(sc, 2, List(shuffleDep1, shuffleDep2))
+    val reduceRdd1 = new MyRDD(sc, 2, List(shuffleDep1), tracker = mapOutputTracker)
+    val reduceRdd2 = new MyRDD(sc, 2, List(shuffleDep1, shuffleDep2), tracker = mapOutputTracker)
 
     // We need to make our own listeners for this test, since by default submit uses the same
     // listener for all jobs, and here we want to capture the failure for each job separately.
@@ -1258,9 +1277,9 @@ class DAGSchedulerSuite
 
   test("run trivial shuffle with out-of-band failure and retry") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0))
     // blockManagerMaster.removeExecutor("exec-hostA")
     // pretend we were told hostA went away
@@ -1281,10 +1300,10 @@ class DAGSchedulerSuite
 
   test("recursive shuffle failures") {
     val shuffleOneRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, null)
-    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne))
-    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, null)
-    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo))
+    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, new HashPartitioner(2))
+    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne), tracker = mapOutputTracker)
+    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, new HashPartitioner(1))
+    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo), tracker = mapOutputTracker)
     submit(finalRdd, Array(0))
     // have the first stage complete normally
     complete(taskSets(0), Seq(
@@ -1310,10 +1329,10 @@ class DAGSchedulerSuite
 
   test("cached post-shuffle") {
     val shuffleOneRdd = new MyRDD(sc, 2, Nil).cache()
-    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, null)
-    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne)).cache()
-    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, null)
-    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo))
+    val shuffleDepOne = new ShuffleDependency(shuffleOneRdd, new HashPartitioner(2))
+    val shuffleTwoRdd = new MyRDD(sc, 2, List(shuffleDepOne), tracker = mapOutputTracker).cache()
+    val shuffleDepTwo = new ShuffleDependency(shuffleTwoRdd, new HashPartitioner(1))
+    val finalRdd = new MyRDD(sc, 1, List(shuffleDepTwo), tracker = mapOutputTracker)
     submit(finalRdd, Array(0))
     cacheLocations(shuffleTwoRdd.id -> 0) = Seq(makeBlockManagerId("hostD"))
     cacheLocations(shuffleTwoRdd.id -> 1) = Seq(makeBlockManagerId("hostC"))
@@ -1419,9 +1438,9 @@ class DAGSchedulerSuite
   test("reduce tasks should be placed locally with map output") {
     // Create an shuffleMapRdd with 1 partition
     val shuffleMapRdd = new MyRDD(sc, 1, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0))
     complete(taskSets(0), Seq(
         (Success, makeMapStatus("hostA", 1))))
@@ -1440,9 +1459,9 @@ class DAGSchedulerSuite
     val numMapTasks = 4
     // Create an shuffleMapRdd with more partitions
     val shuffleMapRdd = new MyRDD(sc, numMapTasks, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(1))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0))
 
     val statuses = (1 to numMapTasks).map { i =>
@@ -1464,10 +1483,10 @@ class DAGSchedulerSuite
     // Create an RDD that has both a shuffle dependency and a narrow dependency (e.g. for a join)
     val rdd1 = new MyRDD(sc, 1, Nil)
     val rdd2 = new MyRDD(sc, 1, Nil, locations = Seq(Seq("hostB")))
-    val shuffleDep = new ShuffleDependency(rdd1, null)
+    val shuffleDep = new ShuffleDependency(rdd1, new HashPartitioner(1))
     val narrowDep = new OneToOneDependency(rdd2)
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep, narrowDep))
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep, narrowDep), tracker = mapOutputTracker)
     submit(reduceRdd, Array(0))
     complete(taskSets(0), Seq(
       (Success, makeMapStatus("hostA", 1))))
@@ -1500,7 +1519,8 @@ class DAGSchedulerSuite
   test("simple map stage submission") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
     val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(1))
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val shuffleId = shuffleDep.shuffleId
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
 
     // Submit a map stage by itself
     submitMapStage(shuffleDep)
@@ -1526,7 +1546,8 @@ class DAGSchedulerSuite
   test("map stage submission with reduce stage also depending on the data") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
     val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(1))
-    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
+    val shuffleId = shuffleDep.shuffleId
+    val reduceRdd = new MyRDD(sc, 1, List(shuffleDep), tracker = mapOutputTracker)
 
     // Submit the map stage by itself
     submitMapStage(shuffleDep)
@@ -1555,7 +1576,7 @@ class DAGSchedulerSuite
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
     val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val shuffleId = shuffleDep.shuffleId
-    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
 
     // Submit a map stage by itself
     submitMapStage(shuffleDep)
@@ -1604,9 +1625,9 @@ class DAGSchedulerSuite
   test("map stage submission with multiple shared stages and failures") {
     val rdd1 = new MyRDD(sc, 2, Nil)
     val dep1 = new ShuffleDependency(rdd1, new HashPartitioner(2))
-    val rdd2 = new MyRDD(sc, 2, List(dep1))
+    val rdd2 = new MyRDD(sc, 2, List(dep1), tracker = mapOutputTracker)
     val dep2 = new ShuffleDependency(rdd2, new HashPartitioner(2))
-    val rdd3 = new MyRDD(sc, 2, List(dep2))
+    val rdd3 = new MyRDD(sc, 2, List(dep2), tracker = mapOutputTracker)
 
     val listener1 = new SimpleListener
     val listener2 = new SimpleListener
@@ -1712,7 +1733,7 @@ class DAGSchedulerSuite
     assertDataStructuresEmpty()
 
     // Also test that a reduce stage using this shuffled data can immediately run
-    val reduceRDD = new MyRDD(sc, 2, List(shuffleDep))
+    val reduceRDD = new MyRDD(sc, 2, List(shuffleDep), tracker = mapOutputTracker)
     results.clear()
     submit(reduceRDD, Array(0, 1))
     complete(taskSets(2), Seq((Success, 42), (Success, 43)))
diff --git a/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
index a5eafb1b5529..26a372d6a905 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/BlockStoreShuffleReaderSuite.scala
@@ -114,7 +114,7 @@ class BlockStoreShuffleReaderSuite extends SparkFunSuite with LocalSparkContext
     // Make a mocked MapOutputTracker for the shuffle reader to use to determine what
     // shuffle data to read.
     val mapOutputTracker = mock(classOf[MapOutputTracker])
-    when(mapOutputTracker.getMapSizesByExecutorId(shuffleId, reduceId)).thenReturn {
+    when(mapOutputTracker.getMapSizesByExecutorId(shuffleId, reduceId, reduceId + 1)).thenReturn {
       // Test a scenario where all data is local, to avoid creating a bunch of additional mocks
       // for the code to read data over the network.
       val shuffleBlockIdsAndSizes = (0 until numMaps).map { mapId =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
index 88f5b13c8f24..743c99a899c6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
@@ -65,6 +65,12 @@ class ShuffledRowRDD(
     Array.tabulate[Partition](part.numPartitions)(i => new ShuffledRowRDDPartition(i))
   }
 
+  override def getPreferredLocations(partition: Partition): Seq[String] = {
+    val tracker = SparkEnv.get.mapOutputTracker.asInstanceOf[MapOutputTrackerMaster]
+    val dep = dependencies.head.asInstanceOf[ShuffleDependency[_, _, _]]
+    tracker.getPreferredLocationsForShuffle(dep, partition.index)
+  }
+
   override def compute(split: Partition, context: TaskContext): Iterator[InternalRow] = {
     val dep = dependencies.head.asInstanceOf[ShuffleDependency[Int, InternalRow, InternalRow]]
     SparkEnv.get.shuffleManager.getReader(dep.shuffleHandle, split.index, split.index + 1, context)

From 922338812c03eba43f2f1a6c414d1b6b049811cf Mon Sep 17 00:00:00 2001
From: Eric Liang <ekl@databricks.com>
Date: Fri, 25 Sep 2015 00:43:22 -0700
Subject: [PATCH 099/896] [SPARK-9681] [ML] Support R feature interactions in
 RFormula

This integrates the Interaction feature transformer with SparkR R formula support (i.e. support `:`).

To generate reasonable ML attribute names for feature interactions, it was necessary to add the ability to read attribute the original attribute names back from `StructField`, and also to specify custom group prefixes in `VectorAssembler`. This also has the side-benefit of cleaning up the double-underscores in the attributes generated for non-interaction terms.

mengxr

Author: Eric Liang <ekl@databricks.com>

Closes #8830 from ericl/interaction-2.
---
 R/pkg/R/mllib.R                               |   2 +-
 R/pkg/inst/tests/test_mllib.R                 |  10 +-
 .../spark/ml/attribute/attributes.scala       |  16 ++-
 .../apache/spark/ml/feature/Interaction.scala |  12 +-
 .../apache/spark/ml/feature/RFormula.scala    | 113 ++++++++++++++----
 .../spark/ml/feature/RFormulaParser.scala     |  97 +++++++++++----
 .../spark/ml/feature/StringIndexer.scala      |   5 +-
 .../ml/feature/RFormulaParserSuite.scala      |  89 +++++++++++++-
 .../spark/ml/feature/RFormulaSuite.scala      |  76 +++++++++++-
 python/pyspark/ml/feature.py                  |   2 +-
 10 files changed, 362 insertions(+), 60 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index cea3d760d05f..474ada595668 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -27,7 +27,7 @@ setClass("PipelineModel", representation(model = "jobj"))
 #' Fits a generalized linear model, similarly to R's glm(). Also see the glmnet package.
 #'
 #' @param formula A symbolic description of the model to be fitted. Currently only a few formula
-#'                operators are supported, including '~', '+', '-', and '.'.
+#'                operators are supported, including '~', '.', ':', '+', and '-'.
 #' @param data DataFrame for training
 #' @param family Error distribution. "gaussian" -> linear regression, "binomial" -> logistic reg.
 #' @param lambda Regularization parameter
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index f272de78ad4a..032f8ec68b9d 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -49,6 +49,14 @@ test_that("dot minus and intercept vs native glm", {
   expect_true(all(abs(rVals - vals) < 1e-6), rVals - vals)
 })
 
+test_that("feature interaction vs native glm", {
+  training <- createDataFrame(sqlContext, iris)
+  model <- glm(Sepal_Width ~ Species:Sepal_Length, data = training)
+  vals <- collect(select(predict(model, training), "prediction"))
+  rVals <- predict(glm(Sepal.Width ~ Species:Sepal.Length, data = iris), iris)
+  expect_true(all(abs(rVals - vals) < 1e-6), rVals - vals)
+})
+
 test_that("summary coefficients match with native glm", {
   training <- createDataFrame(sqlContext, iris)
   stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training))
@@ -57,5 +65,5 @@ test_that("summary coefficients match with native glm", {
   expect_true(all(abs(rCoefs - coefs) < 1e-6))
   expect_true(all(
     as.character(stats$features) ==
-    c("(Intercept)", "Sepal_Length", "Species__versicolor", "Species__virginica")))
+    c("(Intercept)", "Sepal_Length", "Species_versicolor", "Species_virginica")))
 })
diff --git a/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala b/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
index e479f169021d..a7c10333c0d5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/attribute/attributes.scala
@@ -124,18 +124,28 @@ private[attribute] trait AttributeFactory {
   private[attribute] def fromMetadata(metadata: Metadata): Attribute
 
   /**
-   * Creates an [[Attribute]] from a [[StructField]] instance.
+   * Creates an [[Attribute]] from a [[StructField]] instance, optionally preserving name.
    */
-  def fromStructField(field: StructField): Attribute = {
+  private[ml] def decodeStructField(field: StructField, preserveName: Boolean): Attribute = {
     require(field.dataType.isInstanceOf[NumericType])
     val metadata = field.metadata
     val mlAttr = AttributeKeys.ML_ATTR
     if (metadata.contains(mlAttr)) {
-      fromMetadata(metadata.getMetadata(mlAttr)).withName(field.name)
+      val attr = fromMetadata(metadata.getMetadata(mlAttr))
+      if (preserveName) {
+        attr
+      } else {
+        attr.withName(field.name)
+      }
     } else {
       UnresolvedAttribute
     }
   }
+
+  /**
+   * Creates an [[Attribute]] from a [[StructField]] instance.
+   */
+  def fromStructField(field: StructField): Attribute = decodeStructField(field, false)
 }
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
index 9194763fb32f..37f7862476cf 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
@@ -149,8 +149,14 @@ class Interaction(override val uid: String) extends Transformer
     features.reverse.foreach { f =>
       val encodedAttrs = f.dataType match {
         case _: NumericType | BooleanType =>
-          val attr = Attribute.fromStructField(f)
-          encodedFeatureAttrs(Seq(attr), None)
+          val attr = Attribute.decodeStructField(f, preserveName = true)
+          if (attr == UnresolvedAttribute) {
+            encodedFeatureAttrs(Seq(NumericAttribute.defaultAttr.withName(f.name)), None)
+          } else if (!attr.name.isDefined) {
+            encodedFeatureAttrs(Seq(attr.withName(f.name)), None)
+          } else {
+            encodedFeatureAttrs(Seq(attr), None)
+          }
         case _: VectorUDT =>
           val group = AttributeGroup.fromStructField(f)
           encodedFeatureAttrs(group.attributes.get, Some(group.name))
@@ -221,7 +227,7 @@ class Interaction(override val uid: String) extends Transformer
  *                    count is equal to the number of categories. For numeric features the count
  *                    should be set to 1.
  */
-private[ml] class FeatureEncoder(numFeatures: Array[Int]) {
+private[ml] class FeatureEncoder(numFeatures: Array[Int]) extends Serializable {
   assert(numFeatures.forall(_ > 0), "Features counts must all be positive.")
 
   /** The size of the output vector. */
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
index dcd6fe3c406a..f9b840097f3e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
@@ -21,6 +21,7 @@ import scala.collection.mutable
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml.attribute.AttributeGroup
 import org.apache.spark.ml.{Estimator, Model, Pipeline, PipelineModel, PipelineStage, Transformer}
 import org.apache.spark.ml.param.{Param, ParamMap}
 import org.apache.spark.ml.param.shared.{HasFeaturesCol, HasLabelCol}
@@ -42,8 +43,8 @@ private[feature] trait RFormulaBase extends HasFeaturesCol with HasLabelCol {
 /**
  * :: Experimental ::
  * Implements the transforms required for fitting a dataset against an R model formula. Currently
- * we support a limited subset of the R operators, including '.', '~', '+', and '-'. Also see the
- * R formula docs here: http://stat.ethz.ch/R-manual/R-patched/library/stats/html/formula.html
+ * we support a limited subset of the R operators, including '~', '.', ':', '+', and '-'. Also see
+ * the R formula docs here: http://stat.ethz.ch/R-manual/R-patched/library/stats/html/formula.html
  */
 @Experimental
 class RFormula(override val uid: String) extends Estimator[RFormulaModel] with RFormulaBase {
@@ -82,36 +83,54 @@ class RFormula(override val uid: String) extends Estimator[RFormulaModel] with R
     require(isDefined(formula), "Formula must be defined first.")
     val parsedFormula = RFormulaParser.parse($(formula))
     val resolvedFormula = parsedFormula.resolve(dataset.schema)
-    // StringType terms and terms representing interactions need to be encoded before assembly.
-    // TODO(ekl) add support for feature interactions
     val encoderStages = ArrayBuffer[PipelineStage]()
+
+    val prefixesToRewrite = mutable.Map[String, String]()
     val tempColumns = ArrayBuffer[String]()
-    val takenNames = mutable.Set(dataset.columns: _*)
-    val encodedTerms = resolvedFormula.terms.map { term =>
+    def tmpColumn(category: String): String = {
+      val col = Identifiable.randomUID(category)
+      tempColumns += col
+      col
+    }
+
+    // First we index each string column referenced by the input terms.
+    val indexed: Map[String, String] = resolvedFormula.terms.flatten.distinct.map { term =>
       dataset.schema(term) match {
         case column if column.dataType == StringType =>
-          val indexCol = term + "_idx_" + uid
-          val encodedCol = {
-            var tmp = term
-            while (takenNames.contains(tmp)) {
-              tmp += "_"
-            }
-            tmp
-          }
-          takenNames.add(indexCol)
-          takenNames.add(encodedCol)
-          encoderStages += new StringIndexer().setInputCol(term).setOutputCol(indexCol)
-          encoderStages += new OneHotEncoder().setInputCol(indexCol).setOutputCol(encodedCol)
-          tempColumns += indexCol
-          tempColumns += encodedCol
-          encodedCol
+          val indexCol = tmpColumn("stridx")
+          encoderStages += new StringIndexer()
+            .setInputCol(term)
+            .setOutputCol(indexCol)
+          (term, indexCol)
         case _ =>
-          term
+          (term, term)
       }
+    }.toMap
+
+    // Then we handle one-hot encoding and interactions between terms.
+    val encodedTerms = resolvedFormula.terms.map {
+      case Seq(term) if dataset.schema(term).dataType == StringType =>
+        val encodedCol = tmpColumn("onehot")
+        encoderStages += new OneHotEncoder()
+          .setInputCol(indexed(term))
+          .setOutputCol(encodedCol)
+        prefixesToRewrite(encodedCol + "_") = term + "_"
+        encodedCol
+      case Seq(term) =>
+        term
+      case terms =>
+        val interactionCol = tmpColumn("interaction")
+        encoderStages += new Interaction()
+          .setInputCols(terms.map(indexed).toArray)
+          .setOutputCol(interactionCol)
+        prefixesToRewrite(interactionCol + "_") = ""
+        interactionCol
     }
+
     encoderStages += new VectorAssembler(uid)
       .setInputCols(encodedTerms.toArray)
       .setOutputCol($(featuresCol))
+    encoderStages += new VectorAttributeRewriter($(featuresCol), prefixesToRewrite.toMap)
     encoderStages += new ColumnPruner(tempColumns.toSet)
     val pipelineModel = new Pipeline(uid).setStages(encoderStages.toArray).fit(dataset)
     copyValues(new RFormulaModel(uid, resolvedFormula, pipelineModel).setParent(this))
@@ -218,3 +237,53 @@ private class ColumnPruner(columnsToPrune: Set[String]) extends Transformer {
 
   override def copy(extra: ParamMap): ColumnPruner = defaultCopy(extra)
 }
+
+/**
+ * Utility transformer that rewrites Vector attribute names via prefix replacement. For example,
+ * it can rewrite attribute names starting with 'foo_' to start with 'bar_' instead.
+ *
+ * @param vectorCol name of the vector column to rewrite.
+ * @param prefixesToRewrite the map of string prefixes to their replacement values. Each attribute
+ *                          name defined in vectorCol will be checked against the keys of this
+ *                          map. When a key prefixes a name, the matching prefix will be replaced
+ *                          by the value in the map.
+ */
+private class VectorAttributeRewriter(
+    vectorCol: String,
+    prefixesToRewrite: Map[String, String])
+  extends Transformer {
+
+  override val uid = Identifiable.randomUID("vectorAttrRewriter")
+
+  override def transform(dataset: DataFrame): DataFrame = {
+    val metadata = {
+      val group = AttributeGroup.fromStructField(dataset.schema(vectorCol))
+      val attrs = group.attributes.get.map { attr =>
+        if (attr.name.isDefined) {
+          val name = attr.name.get
+          val replacement = prefixesToRewrite.filter { case (k, _) => name.startsWith(k) }
+          if (replacement.nonEmpty) {
+            val (k, v) = replacement.headOption.get
+            attr.withName(v + name.stripPrefix(k))
+          } else {
+            attr
+          }
+        } else {
+          attr
+        }
+      }
+      new AttributeGroup(vectorCol, attrs).toMetadata()
+    }
+    val otherCols = dataset.columns.filter(_ != vectorCol).map(dataset.col)
+    val rewrittenCol = dataset.col(vectorCol).as(vectorCol, metadata)
+    dataset.select((otherCols :+ rewrittenCol): _*)
+  }
+
+  override def transformSchema(schema: StructType): StructType = {
+    StructType(
+      schema.fields.filter(_.name != vectorCol) ++
+      schema.fields.filter(_.name == vectorCol))
+  }
+
+  override def copy(extra: ParamMap): VectorAttributeRewriter = defaultCopy(extra)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormulaParser.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormulaParser.scala
index 1ca3b92a7d92..4079b387e183 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormulaParser.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormulaParser.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.ml.feature
 
+import scala.collection.mutable
 import scala.util.parsing.combinator.RegexParsers
 
 import org.apache.spark.mllib.linalg.VectorUDT
@@ -31,27 +32,35 @@ private[ml] case class ParsedRFormula(label: ColumnRef, terms: Seq[Term]) {
    * of the special '.' term. Duplicate terms will be removed during resolution.
    */
   def resolve(schema: StructType): ResolvedRFormula = {
-    var includedTerms = Seq[String]()
+    val dotTerms = expandDot(schema)
+    var includedTerms = Seq[Seq[String]]()
     terms.foreach {
+      case col: ColumnRef =>
+        includedTerms :+= Seq(col.value)
+      case ColumnInteraction(cols) =>
+        includedTerms ++= expandInteraction(schema, cols)
       case Dot =>
-        includedTerms ++= simpleTypes(schema).filter(_ != label.value)
-      case ColumnRef(value) =>
-        includedTerms :+= value
+        includedTerms ++= dotTerms.map(Seq(_))
       case Deletion(term: Term) =>
         term match {
-          case ColumnRef(value) =>
-            includedTerms = includedTerms.filter(_ != value)
+          case inner: ColumnRef =>
+            includedTerms = includedTerms.filter(_ != Seq(inner.value))
+          case ColumnInteraction(cols) =>
+            val fromInteraction = expandInteraction(schema, cols).map(_.toSet)
+            includedTerms = includedTerms.filter(t => !fromInteraction.contains(t.toSet))
           case Dot =>
             // e.g. "- .", which removes all first-order terms
-            val fromSchema = simpleTypes(schema)
-            includedTerms = includedTerms.filter(fromSchema.contains(_))
+            includedTerms = includedTerms.filter {
+              case Seq(t) => !dotTerms.contains(t)
+              case _ => true
+            }
           case _: Deletion =>
-            assert(false, "Deletion terms cannot be nested")
+            throw new RuntimeException("Deletion terms cannot be nested")
           case _: Intercept =>
         }
       case _: Intercept =>
     }
-    ResolvedRFormula(label.value, includedTerms.distinct)
+    ResolvedRFormula(label.value, includedTerms.distinct, hasIntercept)
   }
 
   /** Whether this formula specifies fitting with an intercept term. */
@@ -67,19 +76,54 @@ private[ml] case class ParsedRFormula(label: ColumnRef, terms: Seq[Term]) {
     intercept
   }
 
+  // expands the Dot operators in interaction terms
+  private def expandInteraction(
+      schema: StructType, terms: Seq[InteractableTerm]): Seq[Seq[String]] = {
+    if (terms.isEmpty) {
+      return Seq(Nil)
+    }
+
+    val rest = expandInteraction(schema, terms.tail)
+    val validInteractions = (terms.head match {
+      case Dot =>
+        expandDot(schema).flatMap { t =>
+          rest.map { r =>
+            Seq(t) ++ r
+          }
+        }
+      case ColumnRef(value) =>
+        rest.map(Seq(value) ++ _)
+    }).map(_.distinct)
+
+    // Deduplicates feature interactions, for example, a:b is the same as b:a.
+    var seen = mutable.Set[Set[String]]()
+    validInteractions.flatMap {
+      case t if seen.contains(t.toSet) =>
+        None
+      case t =>
+        seen += t.toSet
+        Some(t)
+    }.sortBy(_.length)
+  }
+
   // the dot operator excludes complex column types
-  private def simpleTypes(schema: StructType): Seq[String] = {
+  private def expandDot(schema: StructType): Seq[String] = {
     schema.fields.filter(_.dataType match {
       case _: NumericType | StringType | BooleanType | _: VectorUDT => true
       case _ => false
-    }).map(_.name)
+    }).map(_.name).filter(_ != label.value)
   }
 }
 
 /**
  * Represents a fully evaluated and simplified R formula.
+ * @param label the column name of the R formula label (response variable).
+ * @param terms the simplified terms of the R formula. Interactions terms are represented as Seqs
+ *              of column names; non-interaction terms as length 1 Seqs.
+ * @param hasIntercept whether the formula specifies fitting with an intercept.
  */
-private[ml] case class ResolvedRFormula(label: String, terms: Seq[String])
+private[ml] case class ResolvedRFormula(
+  label: String, terms: Seq[Seq[String]], hasIntercept: Boolean)
 
 /**
  * R formula terms. See the R formula docs here for more information:
@@ -87,11 +131,17 @@ private[ml] case class ResolvedRFormula(label: String, terms: Seq[String])
  */
 private[ml] sealed trait Term
 
+/** A term that may be part of an interaction, e.g. 'x' in 'x:y' */
+private[ml] sealed trait InteractableTerm extends Term
+
 /* R formula reference to all available columns, e.g. "." in a formula */
-private[ml] case object Dot extends Term
+private[ml] case object Dot extends InteractableTerm
 
 /* R formula reference to a column, e.g. "+ Species" in a formula */
-private[ml] case class ColumnRef(value: String) extends Term
+private[ml] case class ColumnRef(value: String) extends InteractableTerm
+
+/* R formula interaction of several columns, e.g. "Sepal_Length:Species" in a formula */
+private[ml] case class ColumnInteraction(terms: Seq[InteractableTerm]) extends Term
 
 /* R formula intercept toggle, e.g. "+ 0" in a formula */
 private[ml] case class Intercept(enabled: Boolean) extends Term
@@ -100,25 +150,30 @@ private[ml] case class Intercept(enabled: Boolean) extends Term
 private[ml] case class Deletion(term: Term) extends Term
 
 /**
- * Limited implementation of R formula parsing. Currently supports: '~', '+', '-', '.'.
+ * Limited implementation of R formula parsing. Currently supports: '~', '+', '-', '.', ':'.
  */
 private[ml] object RFormulaParser extends RegexParsers {
-  def intercept: Parser[Intercept] =
+  private val intercept: Parser[Intercept] =
     "([01])".r ^^ { case a => Intercept(a == "1") }
 
-  def columnRef: Parser[ColumnRef] =
+  private val columnRef: Parser[ColumnRef] =
     "([a-zA-Z]|\\.[a-zA-Z_])[a-zA-Z0-9._]*".r ^^ { case a => ColumnRef(a) }
 
-  def term: Parser[Term] = intercept | columnRef | "\\.".r ^^ { case _ => Dot }
+  private val dot: Parser[InteractableTerm] = "\\.".r ^^ { case _ => Dot }
+
+  private val interaction: Parser[List[InteractableTerm]] = rep1sep(columnRef | dot, ":")
+
+  private val term: Parser[Term] = intercept |
+    interaction ^^ { case terms => ColumnInteraction(terms) } | dot | columnRef
 
-  def terms: Parser[List[Term]] = (term ~ rep("+" ~ term | "-" ~ term)) ^^ {
+  private val terms: Parser[List[Term]] = (term ~ rep("+" ~ term | "-" ~ term)) ^^ {
     case op ~ list => list.foldLeft(List(op)) {
       case (left, "+" ~ right) => left ++ Seq(right)
       case (left, "-" ~ right) => left ++ Seq(Deletion(right))
     }
   }
 
-  def formula: Parser[ParsedRFormula] =
+  private val formula: Parser[ParsedRFormula] =
     (columnRef ~ "~" ~ terms) ^^ { case r ~ "~" ~ t => ParsedRFormula(r, t) }
 
   def parse(value: String): ParsedRFormula = parseAll(formula, value) match {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
index 2b1592930e77..486274cd75a1 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
@@ -147,9 +147,8 @@ class StringIndexerModel (
       }
     }
 
-    val outputColName = $(outputCol)
     val metadata = NominalAttribute.defaultAttr
-      .withName(outputColName).withValues(labels).toMetadata()
+      .withName($(inputCol)).withValues(labels).toMetadata()
     // If we are skipping invalid records, filter them out.
     val filteredDataset = (getHandleInvalid) match {
       case "skip" => {
@@ -161,7 +160,7 @@ class StringIndexerModel (
       case _ => dataset
     }
     filteredDataset.select(col("*"),
-      indexer(dataset($(inputCol)).cast(StringType)).as(outputColName, metadata))
+      indexer(dataset($(inputCol)).cast(StringType)).as($(outputCol), metadata))
   }
 
   override def transformSchema(schema: StructType): StructType = {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaParserSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaParserSuite.scala
index 436e66bab09b..53798c659d4f 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaParserSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaParserSuite.scala
@@ -25,16 +25,24 @@ class RFormulaParserSuite extends SparkFunSuite {
       formula: String,
       label: String,
       terms: Seq[String],
-      schema: StructType = null) {
+      schema: StructType = new StructType) {
     val resolved = RFormulaParser.parse(formula).resolve(schema)
     assert(resolved.label == label)
-    assert(resolved.terms == terms)
+    val simpleTerms = terms.map { t =>
+      if (t.contains(":")) {
+        t.split(":").toSeq
+      } else {
+        Seq(t)
+      }
+    }
+    assert(resolved.terms == simpleTerms)
   }
 
   test("parse simple formulas") {
     checkParse("y ~ x", "y", Seq("x"))
     checkParse("y ~ x + x", "y", Seq("x"))
-    checkParse("y ~   ._foo  ", "y", Seq("._foo"))
+    checkParse("y~x+z", "y", Seq("x", "z"))
+    checkParse("y ~   ._fo..o  ", "y", Seq("._fo..o"))
     checkParse("resp ~ A_VAR + B + c123", "resp", Seq("A_VAR", "B", "c123"))
   }
 
@@ -79,4 +87,79 @@ class RFormulaParserSuite extends SparkFunSuite {
     assert(!RFormulaParser.parse("a ~ b - 1").hasIntercept)
     assert(!RFormulaParser.parse("a ~ b + 1 - 1").hasIntercept)
   }
+
+  test("parse interactions") {
+    checkParse("y ~ a:b", "y", Seq("a:b"))
+    checkParse("y ~ ._a:._x", "y", Seq("._a:._x"))
+    checkParse("y ~ foo:bar", "y", Seq("foo:bar"))
+    checkParse("y ~ a : b : c", "y", Seq("a:b:c"))
+    checkParse("y ~ q + a:b:c + b:c + c:d + z", "y", Seq("q", "a:b:c", "b:c", "c:d", "z"))
+  }
+
+  test("parse basic interactions with dot") {
+    val schema = (new StructType)
+      .add("a", "int", true)
+      .add("b", "long", false)
+      .add("c", "string", true)
+      .add("d", "string", true)
+    checkParse("a ~ .:b", "a", Seq("b", "c:b", "d:b"), schema)
+    checkParse("a ~ b:.", "a", Seq("b", "b:c", "b:d"), schema)
+    checkParse("a ~ .:b:.:.:c:d:.", "a", Seq("b:c:d"), schema)
+  }
+
+  // Test data generated in R with terms.formula(y ~ .:., data = iris)
+  test("parse all to all iris interactions") {
+    val schema = (new StructType)
+      .add("Sepal.Length", "double", true)
+      .add("Sepal.Width", "double", true)
+      .add("Petal.Length", "double", true)
+      .add("Petal.Width", "double", true)
+      .add("Species", "string", true)
+    checkParse(
+      "y ~ .:.",
+      "y",
+      Seq(
+        "Sepal.Length",
+        "Sepal.Width",
+        "Petal.Length",
+        "Petal.Width",
+        "Species",
+        "Sepal.Length:Sepal.Width",
+        "Sepal.Length:Petal.Length",
+        "Sepal.Length:Petal.Width",
+        "Sepal.Length:Species",
+        "Sepal.Width:Petal.Length",
+        "Sepal.Width:Petal.Width",
+        "Sepal.Width:Species",
+        "Petal.Length:Petal.Width",
+        "Petal.Length:Species",
+        "Petal.Width:Species"),
+      schema)
+  }
+
+  // Test data generated in R with terms.formula(y ~ .:. - Species:., data = iris)
+  test("parse interaction negation with iris") {
+    val schema = (new StructType)
+      .add("Sepal.Length", "double", true)
+      .add("Sepal.Width", "double", true)
+      .add("Petal.Length", "double", true)
+      .add("Petal.Width", "double", true)
+      .add("Species", "string", true)
+    checkParse("y ~ .:. - .:.", "y", Nil, schema)
+    checkParse(
+      "y ~ .:. - Species:.",
+      "y",
+      Seq(
+        "Sepal.Length",
+        "Sepal.Width",
+        "Petal.Length",
+        "Petal.Width",
+        "Sepal.Length:Sepal.Width",
+        "Sepal.Length:Petal.Length",
+        "Sepal.Length:Petal.Width",
+        "Sepal.Width:Petal.Length",
+        "Sepal.Width:Petal.Width",
+        "Petal.Length:Petal.Width"),
+      schema)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
index 6aed3243afce..b56013008b11 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
@@ -118,9 +118,81 @@ class RFormulaSuite extends SparkFunSuite with MLlibTestSparkContext {
     val expectedAttrs = new AttributeGroup(
       "features",
       Array(
-        new BinaryAttribute(Some("a__bar"), Some(1)),
-        new BinaryAttribute(Some("a__foo"), Some(2)),
+        new BinaryAttribute(Some("a_bar"), Some(1)),
+        new BinaryAttribute(Some("a_foo"), Some(2)),
         new NumericAttribute(Some("b"), Some(3))))
     assert(attrs === expectedAttrs)
   }
+
+  test("numeric interaction") {
+    val formula = new RFormula().setFormula("a ~ b:c:d")
+    val original = sqlContext.createDataFrame(
+      Seq((1, 2, 4, 2), (2, 3, 4, 1))
+    ).toDF("a", "b", "c", "d")
+    val model = formula.fit(original)
+    val result = model.transform(original)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (1, 2, 4, 2, Vectors.dense(16.0), 1.0),
+        (2, 3, 4, 1, Vectors.dense(12.0), 2.0))
+      ).toDF("a", "b", "c", "d", "features", "label")
+    assert(result.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(result.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](new NumericAttribute(Some("b:c:d"), Some(1))))
+    assert(attrs === expectedAttrs)
+  }
+
+  test("factor numeric interaction") {
+    val formula = new RFormula().setFormula("id ~ a:b")
+    val original = sqlContext.createDataFrame(
+      Seq((1, "foo", 4), (2, "bar", 4), (3, "bar", 5), (4, "baz", 5), (4, "baz", 5), (4, "baz", 5))
+    ).toDF("id", "a", "b")
+    val model = formula.fit(original)
+    val result = model.transform(original)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (1, "foo", 4, Vectors.dense(0.0, 0.0, 4.0), 1.0),
+        (2, "bar", 4, Vectors.dense(0.0, 4.0, 0.0), 2.0),
+        (3, "bar", 5, Vectors.dense(0.0, 5.0, 0.0), 3.0),
+        (4, "baz", 5, Vectors.dense(5.0, 0.0, 0.0), 4.0),
+        (4, "baz", 5, Vectors.dense(5.0, 0.0, 0.0), 4.0),
+        (4, "baz", 5, Vectors.dense(5.0, 0.0, 0.0), 4.0))
+      ).toDF("id", "a", "b", "features", "label")
+    assert(result.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(result.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](
+        new NumericAttribute(Some("a_baz:b"), Some(1)),
+        new NumericAttribute(Some("a_bar:b"), Some(2)),
+        new NumericAttribute(Some("a_foo:b"), Some(3))))
+    assert(attrs === expectedAttrs)
+  }
+
+  test("factor factor interaction") {
+    val formula = new RFormula().setFormula("id ~ a:b")
+    val original = sqlContext.createDataFrame(
+      Seq((1, "foo", "zq"), (2, "bar", "zq"), (3, "bar", "zz"))
+    ).toDF("id", "a", "b")
+    val model = formula.fit(original)
+    val result = model.transform(original)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        (1, "foo", "zq", Vectors.dense(0.0, 0.0, 1.0, 0.0), 1.0),
+        (2, "bar", "zq", Vectors.dense(1.0, 0.0, 0.0, 0.0), 2.0),
+        (3, "bar", "zz", Vectors.dense(0.0, 1.0, 0.0, 0.0), 3.0))
+      ).toDF("id", "a", "b", "features", "label")
+    assert(result.collect() === expected.collect())
+    val attrs = AttributeGroup.fromStructField(result.schema("features"))
+    val expectedAttrs = new AttributeGroup(
+      "features",
+      Array[Attribute](
+        new NumericAttribute(Some("a_bar:b_zq"), Some(1)),
+        new NumericAttribute(Some("a_bar:b_zz"), Some(2)),
+        new NumericAttribute(Some("a_foo:b_zq"), Some(3)),
+        new NumericAttribute(Some("a_foo:b_zz"), Some(4))))
+    assert(attrs === expectedAttrs)
+  }
 }
diff --git a/python/pyspark/ml/feature.py b/python/pyspark/ml/feature.py
index f41d72f87725..a4e60f916b5c 100644
--- a/python/pyspark/ml/feature.py
+++ b/python/pyspark/ml/feature.py
@@ -1850,7 +1850,7 @@ class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol):
 
     Implements the transforms required for fitting a dataset against an
     R model formula. Currently we support a limited subset of the R
-    operators, including '~', '+', '-', and '.'. Also see the R formula
+    operators, including '~', '.', ':', '+', and '-'. Also see the R formula
     docs:
     http://stat.ethz.ch/R-manual/R-patched/library/stats/html/formula.html
 

From 6fcee906d2afb5d5c3c49e0a669637a87e82b910 Mon Sep 17 00:00:00 2001
From: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>
Date: Fri, 25 Sep 2015 11:55:08 -0700
Subject: [PATCH 100/896] [SPARK-10760] [SPARKR] SparkR glm: the documentation
 in examples - family argument is missing

Hi everyone,

Since the family argument is required for the glm function, the execution of:

model <- glm(Sepal_Length ~ Sepal_Width, df)

is failing.

I've fixed the documentation by adding the family argument and also added the summay(model) which will show the coefficients for the model.

Thanks,
Narine

Author: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>

Closes #8870 from NarineK/sparkrml.
---
 R/pkg/R/mllib.R | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index 474ada595668..cd00bbbeec69 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -41,7 +41,8 @@ setClass("PipelineModel", representation(model = "jobj"))
 #' sqlContext <- sparkRSQL.init(sc)
 #' data(iris)
 #' df <- createDataFrame(sqlContext, iris)
-#' model <- glm(Sepal_Length ~ Sepal_Width, df)
+#' model <- glm(Sepal_Length ~ Sepal_Width, df, family="gaussian")
+#' summary(model)
 #'}
 setMethod("glm", signature(formula = "formula", family = "ANY", data = "DataFrame"),
           function(formula, family = c("gaussian", "binomial"), data, lambda = 0, alpha = 0) {

From 6f94d56a95e8c3a410a8d0c6a24ccca043227ba9 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Sat, 26 Sep 2015 19:08:55 -0700
Subject: [PATCH 101/896] [SPARK-10845] [SQL] Makes spark.sql.hive.version a
 SQLConfEntry

When refactoring SQL options from plain strings to the strongly typed `SQLConfEntry`, `spark.sql.hive.version` wasn't migrated, and doesn't show up in the result of `SET -v`, as `SET -v` only shows public `SQLConfEntry` instances. This affects compatibility with Simba ODBC driver.

This PR migrates this SQL option as a `SQLConfEntry` to fix this issue.

Author: Cheng Lian <lian@databricks.com>

Closes #8925 from liancheng/spark-10845/hive-version-conf.
---
 .../hive/thriftserver/HiveThriftServer2.scala |  1 -
 .../HiveThriftServer2Suites.scala             | 27 +++++++++++++++++++
 .../apache/spark/sql/hive/HiveContext.scala   |  5 ++++
 3 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
index a0643cec0fb7..a4fd0c3ce970 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2.scala
@@ -55,7 +55,6 @@ object HiveThriftServer2 extends Logging {
   @DeveloperApi
   def startWithContext(sqlContext: HiveContext): Unit = {
     val server = new HiveThriftServer2(sqlContext)
-    sqlContext.setConf("spark.sql.hive.version", HiveContext.hiveExecutionVersion)
     server.init(sqlContext.hiveconf)
     server.start()
     listener = new HiveThriftServer2Listener(server, sqlContext.conf)
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index b72249b3bf8c..19b2f24456ab 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -21,6 +21,7 @@ import java.io.File
 import java.net.URL
 import java.sql.{Date, DriverManager, SQLException, Statement}
 
+import scala.collection.mutable
 import scala.collection.mutable.ArrayBuffer
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.duration._
@@ -431,6 +432,32 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
       }
     )
   }
+
+  test("Checks Hive version via SET -v") {
+    withJdbcStatement { statement =>
+      val resultSet = statement.executeQuery("SET -v")
+
+      val conf = mutable.Map.empty[String, String]
+      while (resultSet.next()) {
+        conf += resultSet.getString(1) -> resultSet.getString(2)
+      }
+
+      assert(conf.get("spark.sql.hive.version") === Some("1.2.1"))
+    }
+  }
+
+  test("Checks Hive version via SET") {
+    withJdbcStatement { statement =>
+      val resultSet = statement.executeQuery("SET")
+
+      val conf = mutable.Map.empty[String, String]
+      while (resultSet.next()) {
+        conf += resultSet.getString(1) -> resultSet.getString(2)
+      }
+
+      assert(conf.get("spark.sql.hive.version") === Some("1.2.1"))
+    }
+  }
 }
 
 class HiveThriftHttpServerSuite extends HiveThriftJdbcTest {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c12a73486332..c75025e79af4 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -610,6 +610,11 @@ private[hive] object HiveContext {
     doc = "Version of the Hive metastore. Available options are " +
         s"<code>0.12.0</code> through <code>$hiveExecutionVersion</code>.")
 
+  val HIVE_EXECUTION_VERSION = stringConf(
+    key = "spark.sql.hive.version",
+    defaultValue = Some(hiveExecutionVersion),
+    doc = "Version of Hive used internally by Spark SQL.")
+
   val HIVE_METASTORE_JARS = stringConf("spark.sql.hive.metastore.jars",
     defaultValue = Some("builtin"),
     doc = s"""

From 299b439920f980cce4c4f4e4a8436a5145efeaa3 Mon Sep 17 00:00:00 2001
From: y-shimizu <y.shimizu0429@gmail.com>
Date: Sun, 27 Sep 2015 16:36:03 +0100
Subject: [PATCH 102/896] [SPARK-10778] [MLLIB] Implement toString for
 AssociationRules.Rule

I implemented toString for AssociationRules.Rule, format like `[x, y] => {z}: 1.0`

Author: y-shimizu <y.shimizu0429@gmail.com>

Closes #8904 from y-shimizu/master.
---
 .../scala/org/apache/spark/mllib/fpm/AssociationRules.scala  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/fpm/AssociationRules.scala b/mllib/src/main/scala/org/apache/spark/mllib/fpm/AssociationRules.scala
index 95c688c86a7e..07eb750b06a3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/fpm/AssociationRules.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/fpm/AssociationRules.scala
@@ -142,5 +142,10 @@ object AssociationRules {
     def javaConsequent: java.util.List[Item] = {
       consequent.toList.asJava
     }
+
+    override def toString: String = {
+      s"${antecedent.mkString("{", ",", "}")} => " +
+        s"${consequent.mkString("{", ",", "}")}: ${confidence}"
+    }
   }
 }

From 418e5e4cbdaab87addb91ac0bb2245ff0213ac81 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Sun, 27 Sep 2015 09:08:38 -0700
Subject: [PATCH 103/896] [SPARK-10741] [SQL] Hive Query Having/OrderBy against
 Parquet table is not working

https://issues.apache.org/jira/browse/SPARK-10741
I choose the second approach: do not change output exprIds when convert MetastoreRelation to LogicalRelation

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8889 from cloud-fan/hot-bug.
---
 .../analysis/MultiInstanceRelation.scala      |  1 -
 .../expressions/namedExpressions.scala        |  8 +++
 .../org/apache/spark/sql/DataFrame.scala      |  2 +-
 .../datasources/DataSourceStrategy.scala      | 18 +++---
 .../datasources/LogicalRelation.scala         | 33 +++++++---
 .../sql/execution/datasources/rules.scala     | 14 ++--
 .../parquet/ParquetFilterSuite.scala          |  2 +-
 .../ParquetPartitionDiscoverySuite.scala      |  2 +-
 .../spark/sql/hive/HiveMetastoreCatalog.scala | 64 +++++--------------
 .../spark/sql/hive/execution/commands.scala   |  2 +-
 .../sql/hive/InsertIntoHiveTableSuite.scala   |  4 +-
 .../sql/hive/MetastoreDataSourcesSuite.scala  |  2 +-
 .../sql/hive/execution/SQLQuerySuite.scala    | 27 +++++++-
 .../apache/spark/sql/hive/parquetSuites.scala |  8 +--
 .../sql/sources/hadoopFsRelationSuites.scala  |  2 +-
 15 files changed, 103 insertions(+), 86 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/MultiInstanceRelation.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/MultiInstanceRelation.scala
index 35b74024a4ca..394be47a588b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/MultiInstanceRelation.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/MultiInstanceRelation.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.catalyst.analysis
 
-import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 6f173b52ad9b..5768c6087db3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -236,6 +236,14 @@ case class AttributeReference(
     }
   }
 
+  def withExprId(newExprId: ExprId): AttributeReference = {
+    if (exprId == newExprId) {
+      this
+    } else {
+      AttributeReference(name, dataType, nullable, metadata)(newExprId, qualifiers)
+    }
+  }
+
   override def toString: String = s"$name#${exprId.id}$typeSuffix"
 }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index f9995da3a85e..9c67ad18c3d2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1595,7 +1595,7 @@ class DataFrame private[sql](
    */
   def inputFiles: Array[String] = {
     val files: Seq[String] = logicalPlan.collect {
-      case LogicalRelation(fsBasedRelation: FileRelation) =>
+      case LogicalRelation(fsBasedRelation: FileRelation, _) =>
         fsBasedRelation.inputFiles
       case fr: FileRelation =>
         fr.inputFiles
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index c58213155daa..918db8e7d083 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -38,21 +38,21 @@ import org.apache.spark.util.{SerializableConfiguration, Utils}
  */
 private[sql] object DataSourceStrategy extends Strategy with Logging {
   def apply(plan: LogicalPlan): Seq[execution.SparkPlan] = plan match {
-    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: CatalystScan)) =>
+    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: CatalystScan, _)) =>
       pruneFilterProjectRaw(
         l,
         projects,
         filters,
         (a, f) => toCatalystRDD(l, a, t.buildScan(a, f))) :: Nil
 
-    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: PrunedFilteredScan)) =>
+    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: PrunedFilteredScan, _)) =>
       pruneFilterProject(
         l,
         projects,
         filters,
         (a, f) => toCatalystRDD(l, a, t.buildScan(a.map(_.name).toArray, f))) :: Nil
 
-    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: PrunedScan)) =>
+    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: PrunedScan, _)) =>
       pruneFilterProject(
         l,
         projects,
@@ -60,7 +60,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         (a, _) => toCatalystRDD(l, a, t.buildScan(a.map(_.name).toArray))) :: Nil
 
     // Scanning partitioned HadoopFsRelation
-    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation))
+    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation, _))
         if t.partitionSpec.partitionColumns.nonEmpty =>
       val selectedPartitions = prunePartitions(filters, t.partitionSpec).toArray
 
@@ -88,7 +88,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         selectedPartitions) :: Nil
 
     // Scanning non-partitioned HadoopFsRelation
-    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation)) =>
+    case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation, _)) =>
       // See buildPartitionedTableScan for the reason that we need to create a shard
       // broadcast HadoopConf.
       val sharedHadoopConf = SparkHadoopUtil.get.conf
@@ -101,16 +101,16 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         (a, f) =>
           toCatalystRDD(l, a, t.buildScan(a.map(_.name).toArray, f, t.paths, confBroadcast))) :: Nil
 
-    case l @ LogicalRelation(baseRelation: TableScan) =>
+    case l @ LogicalRelation(baseRelation: TableScan, _) =>
       execution.PhysicalRDD.createFromDataSource(
         l.output, toCatalystRDD(l, baseRelation.buildScan()), baseRelation) :: Nil
 
-    case i @ logical.InsertIntoTable(
-      l @ LogicalRelation(t: InsertableRelation), part, query, overwrite, false) if part.isEmpty =>
+    case i @ logical.InsertIntoTable(l @ LogicalRelation(t: InsertableRelation, _),
+      part, query, overwrite, false) if part.isEmpty =>
       execution.ExecutedCommand(InsertIntoDataSource(l, query, overwrite)) :: Nil
 
     case i @ logical.InsertIntoTable(
-      l @ LogicalRelation(t: HadoopFsRelation), part, query, overwrite, false) =>
+      l @ LogicalRelation(t: HadoopFsRelation, _), part, query, overwrite, false) =>
       val mode = if (overwrite) SaveMode.Overwrite else SaveMode.Append
       execution.ExecutedCommand(InsertIntoHadoopFsRelation(t, query, mode)) :: Nil
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
index a7123dc845fa..4069179aa734 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
@@ -17,23 +17,40 @@
 package org.apache.spark.sql.execution.datasources
 
 import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
-import org.apache.spark.sql.catalyst.expressions.{AttributeMap, AttributeReference}
+import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeMap, AttributeReference}
 import org.apache.spark.sql.catalyst.plans.logical.{LeafNode, LogicalPlan, Statistics}
 import org.apache.spark.sql.sources.BaseRelation
 
 /**
  * Used to link a [[BaseRelation]] in to a logical query plan.
+ *
+ * Note that sometimes we need to use `LogicalRelation` to replace an existing leaf node without
+ * changing the output attributes' IDs.  The `expectedOutputAttributes` parameter is used for
+ * this purpose.  See https://issues.apache.org/jira/browse/SPARK-10741 for more details.
  */
-private[sql] case class LogicalRelation(relation: BaseRelation)
-  extends LeafNode
-  with MultiInstanceRelation {
+private[sql] case class LogicalRelation(
+    relation: BaseRelation,
+    expectedOutputAttributes: Option[Seq[Attribute]] = None)
+  extends LeafNode with MultiInstanceRelation {
 
-  override val output: Seq[AttributeReference] = relation.schema.toAttributes
+  override val output: Seq[AttributeReference] = {
+    val attrs = relation.schema.toAttributes
+    expectedOutputAttributes.map { expectedAttrs =>
+      assert(expectedAttrs.length == attrs.length)
+      attrs.zip(expectedAttrs).map {
+        // We should respect the attribute names provided by base relation and only use the
+        // exprId in `expectedOutputAttributes`.
+        // The reason is that, some relations(like parquet) will reconcile attribute names to
+        // workaround case insensitivity issue.
+        case (attr, expected) => attr.withExprId(expected.exprId)
+      }
+    }.getOrElse(attrs)
+  }
 
   // Logical Relations are distinct if they have different output for the sake of transformations.
   override def equals(other: Any): Boolean = other match {
-    case l @ LogicalRelation(otherRelation) => relation == otherRelation && output == l.output
-    case  _ => false
+    case l @ LogicalRelation(otherRelation, _) => relation == otherRelation && output == l.output
+    case _ => false
   }
 
   override def hashCode: Int = {
@@ -41,7 +58,7 @@ private[sql] case class LogicalRelation(relation: BaseRelation)
   }
 
   override def sameResult(otherPlan: LogicalPlan): Boolean = otherPlan match {
-    case LogicalRelation(otherRelation) => relation == otherRelation
+    case LogicalRelation(otherRelation, _) => relation == otherRelation
     case _ => false
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
index 16c9138419fa..8efc8016f94d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
@@ -37,7 +37,7 @@ private[sql] object PreInsertCastAndRename extends Rule[LogicalPlan] {
 
       // We are inserting into an InsertableRelation or HadoopFsRelation.
       case i @ InsertIntoTable(
-      l @ LogicalRelation(_: InsertableRelation | _: HadoopFsRelation), _, child, _, _) => {
+      l @ LogicalRelation(_: InsertableRelation | _: HadoopFsRelation, _), _, child, _, _) => {
         // First, make sure the data to be inserted have the same number of fields with the
         // schema of the relation.
         if (l.output.size != child.output.size) {
@@ -84,14 +84,14 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
   def apply(plan: LogicalPlan): Unit = {
     plan.foreach {
       case i @ logical.InsertIntoTable(
-        l @ LogicalRelation(t: InsertableRelation), partition, query, overwrite, ifNotExists) =>
+        l @ LogicalRelation(t: InsertableRelation, _), partition, query, overwrite, ifNotExists) =>
         // Right now, we do not support insert into a data source table with partition specs.
         if (partition.nonEmpty) {
           failAnalysis(s"Insert into a partition is not allowed because $l is not partitioned.")
         } else {
           // Get all input data source relations of the query.
           val srcRelations = query.collect {
-            case LogicalRelation(src: BaseRelation) => src
+            case LogicalRelation(src: BaseRelation, _) => src
           }
           if (srcRelations.contains(t)) {
             failAnalysis(
@@ -102,7 +102,7 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
         }
 
       case logical.InsertIntoTable(
-        LogicalRelation(r: HadoopFsRelation), part, query, overwrite, _) =>
+        LogicalRelation(r: HadoopFsRelation, _), part, query, overwrite, _) =>
         // We need to make sure the partition columns specified by users do match partition
         // columns of the relation.
         val existingPartitionColumns = r.partitionColumns.fieldNames.toSet
@@ -120,7 +120,7 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
 
         // Get all input data source relations of the query.
         val srcRelations = query.collect {
-          case LogicalRelation(src: BaseRelation) => src
+          case LogicalRelation(src: BaseRelation, _) => src
         }
         if (srcRelations.contains(r)) {
           failAnalysis(
@@ -148,10 +148,10 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
           EliminateSubQueries(catalog.lookupRelation(tableIdent.toSeq)) match {
             // Only do the check if the table is a data source table
             // (the relation is a BaseRelation).
-            case l @ LogicalRelation(dest: BaseRelation) =>
+            case l @ LogicalRelation(dest: BaseRelation, _) =>
               // Get all input data source relations of the query.
               val srcRelations = query.collect {
-                case LogicalRelation(src: BaseRelation) => src
+                case LogicalRelation(src: BaseRelation, _) => src
               }
               if (srcRelations.contains(dest)) {
                 failAnalysis(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index f067112cfca9..45ad3fde559c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -55,7 +55,7 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
         .where(Column(predicate))
 
       val analyzedPredicate = query.queryExecution.optimizedPlan.collect {
-        case PhysicalOperation(_, filters, LogicalRelation(_: ParquetRelation)) => filters
+        case PhysicalOperation(_, filters, LogicalRelation(_: ParquetRelation, _)) => filters
       }.flatten
       assert(analyzedPredicate.nonEmpty)
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
index 7bac8609e1b9..3a23b8ed6680 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
@@ -465,7 +465,7 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       (1 to 10).map(i => (i, i.toString)).toDF("a", "b").write.parquet(dir.getCanonicalPath)
       val queryExecution = sqlContext.read.parquet(dir.getCanonicalPath).queryExecution
       queryExecution.analyzed.collectFirst {
-        case LogicalRelation(relation: ParquetRelation) =>
+        case LogicalRelation(relation: ParquetRelation, _) =>
           assert(relation.partitionSpec === PartitionSpec.emptySpec)
       }.getOrElse {
         fail(s"Expecting a ParquetRelation2, but got:\n$queryExecution")
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index 012634cb5aeb..ea1521a48c8a 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -448,7 +448,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         partitionSpecInMetastore: Option[PartitionSpec]): Option[LogicalRelation] = {
       cachedDataSourceTables.getIfPresent(tableIdentifier) match {
         case null => None // Cache miss
-        case logical @ LogicalRelation(parquetRelation: ParquetRelation) =>
+        case logical @ LogicalRelation(parquetRelation: ParquetRelation, _) =>
           // If we have the same paths, same schema, and same partition spec,
           // we will use the cached Parquet Relation.
           val useCached =
@@ -514,7 +514,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       parquetRelation
     }
 
-    result.newInstance()
+    result.copy(expectedOutputAttributes = Some(metastoreRelation.output))
   }
 
   override def getTables(databaseName: Option[String]): Seq[(String, Boolean)] = {
@@ -553,60 +553,28 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         return plan
       }
 
-      // Collects all `MetastoreRelation`s which should be replaced
-      val toBeReplaced = plan.collect {
+      plan transformUp {
         // Write path
-        case InsertIntoTable(relation: MetastoreRelation, _, _, _, _)
-            // Inserting into partitioned table is not supported in Parquet data source (yet).
-            if !relation.hiveQlTable.isPartitioned &&
-              hive.convertMetastoreParquet &&
-              relation.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
-          val parquetRelation = convertToParquetRelation(relation)
-          val attributedRewrites = relation.output.zip(parquetRelation.output)
-          (relation, parquetRelation, attributedRewrites)
+        case InsertIntoTable(r: MetastoreRelation, partition, child, overwrite, ifNotExists)
+          // Inserting into partitioned table is not supported in Parquet data source (yet).
+          if !r.hiveQlTable.isPartitioned && hive.convertMetastoreParquet &&
+            r.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
+          val parquetRelation = convertToParquetRelation(r)
+          InsertIntoTable(parquetRelation, partition, child, overwrite, ifNotExists)
 
         // Write path
-        case InsertIntoHiveTable(relation: MetastoreRelation, _, _, _, _)
+        case InsertIntoHiveTable(r: MetastoreRelation, partition, child, overwrite, ifNotExists)
           // Inserting into partitioned table is not supported in Parquet data source (yet).
-          if !relation.hiveQlTable.isPartitioned &&
-            hive.convertMetastoreParquet &&
-            relation.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
-          val parquetRelation = convertToParquetRelation(relation)
-          val attributedRewrites = relation.output.zip(parquetRelation.output)
-          (relation, parquetRelation, attributedRewrites)
+          if !r.hiveQlTable.isPartitioned && hive.convertMetastoreParquet &&
+            r.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
+          val parquetRelation = convertToParquetRelation(r)
+          InsertIntoTable(parquetRelation, partition, child, overwrite, ifNotExists)
 
         // Read path
         case relation: MetastoreRelation if hive.convertMetastoreParquet &&
-              relation.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
+          relation.tableDesc.getSerdeClassName.toLowerCase.contains("parquet") =>
           val parquetRelation = convertToParquetRelation(relation)
-          val attributedRewrites = relation.output.zip(parquetRelation.output)
-          (relation, parquetRelation, attributedRewrites)
-      }
-
-      val relationMap = toBeReplaced.map(r => (r._1, r._2)).toMap
-      val attributedRewrites = AttributeMap(toBeReplaced.map(_._3).fold(Nil)(_ ++: _))
-
-      // Replaces all `MetastoreRelation`s with corresponding `ParquetRelation2`s, and fixes
-      // attribute IDs referenced in other nodes.
-      plan.transformUp {
-        case r: MetastoreRelation if relationMap.contains(r) =>
-          val parquetRelation = relationMap(r)
-          val alias = r.alias.getOrElse(r.tableName)
-          Subquery(alias, parquetRelation)
-
-        case InsertIntoTable(r: MetastoreRelation, partition, child, overwrite, ifNotExists)
-          if relationMap.contains(r) =>
-          val parquetRelation = relationMap(r)
-          InsertIntoTable(parquetRelation, partition, child, overwrite, ifNotExists)
-
-        case InsertIntoHiveTable(r: MetastoreRelation, partition, child, overwrite, ifNotExists)
-          if relationMap.contains(r) =>
-          val parquetRelation = relationMap(r)
-          InsertIntoTable(parquetRelation, partition, child, overwrite, ifNotExists)
-
-        case other => other.transformExpressions {
-          case a: Attribute if a.resolved => attributedRewrites.getOrElse(a, a)
-        }
+          Subquery(relation.alias.getOrElse(relation.tableName), parquetRelation)
       }
     }
   }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
index d1699dd53681..9f654eed5761 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
@@ -235,7 +235,7 @@ case class CreateMetastoreDataSourceAsSelect(
             sqlContext, Some(query.schema.asNullable), partitionColumns, provider, optionsWithPath)
           val createdRelation = LogicalRelation(resolved.relation)
           EliminateSubQueries(sqlContext.catalog.lookupRelation(tableIdent.toSeq)) match {
-            case l @ LogicalRelation(_: InsertableRelation | _: HadoopFsRelation) =>
+            case l @ LogicalRelation(_: InsertableRelation | _: HadoopFsRelation, _) =>
               if (l.relation != createdRelation.relation) {
                 val errorDescription =
                   s"Cannot append to table $tableName because the resolved relation does not " +
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala
index 80a61f82fd24..81ee9ba71beb 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/InsertIntoHiveTableSuite.scala
@@ -81,9 +81,9 @@ class InsertIntoHiveTableSuite extends QueryTest with TestHiveSingleton with Bef
   test("Double create fails when allowExisting = false") {
     sql("CREATE TABLE doubleCreateAndInsertTest (key int, value string)")
 
-    val message = intercept[QueryExecutionException] {
+    intercept[QueryExecutionException] {
       sql("CREATE TABLE doubleCreateAndInsertTest (key int, value string)")
-    }.getMessage
+    }
   }
 
   test("Double create does not fail when allowExisting = true") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
index bf0db084906c..d3565380005a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
@@ -570,7 +570,7 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
             Row(3) :: Row(4) :: Nil)
 
           table("test_parquet_ctas").queryExecution.optimizedPlan match {
-            case LogicalRelation(p: ParquetRelation) => // OK
+            case LogicalRelation(p: ParquetRelation, _) => // OK
             case _ =>
               fail(s"test_parquet_ctas should have be converted to ${classOf[ParquetRelation]}")
           }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 71823e32ad38..8c3f9ac20263 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -263,7 +263,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
     def checkRelation(tableName: String, isDataSourceParquet: Boolean): Unit = {
       val relation = EliminateSubQueries(catalog.lookupRelation(Seq(tableName)))
       relation match {
-        case LogicalRelation(r: ParquetRelation) =>
+        case LogicalRelation(r: ParquetRelation, _) =>
           if (!isDataSourceParquet) {
             fail(
               s"${classOf[MetastoreRelation].getCanonicalName} is expected, but found " +
@@ -1223,4 +1223,29 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
     checkAnswer(df, (0 until 5).map(i => Row(i + "#", i + "#")))
   }
+
+  test("SPARK-10741: Sort on Aggregate using parquet") {
+    withTable("test10741") {
+      withTempTable("src") {
+        Seq("a" -> 5, "a" -> 9, "b" -> 6).toDF().registerTempTable("src")
+        sql("CREATE TABLE test10741(c1 STRING, c2 INT) STORED AS PARQUET AS SELECT * FROM src")
+      }
+
+      checkAnswer(sql(
+        """
+          |SELECT c1, AVG(c2) AS c_avg
+          |FROM test10741
+          |GROUP BY c1
+          |HAVING (AVG(c2) > 5) ORDER BY c1
+        """.stripMargin), Row("a", 7.0) :: Row("b", 6.0) :: Nil)
+
+      checkAnswer(sql(
+        """
+          |SELECT c1, AVG(c2) AS c_avg
+          |FROM test10741
+          |GROUP BY c1
+          |ORDER BY AVG(c2)
+        """.stripMargin), Row("b", 6.0) :: Row("a", 7.0) :: Nil)
+    }
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
index 6842ec2b5eb3..7d8104f9358d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
@@ -282,7 +282,7 @@ class ParquetMetastoreSuite extends ParquetPartitioningTest {
       )
 
       table("test_parquet_ctas").queryExecution.optimizedPlan match {
-        case LogicalRelation(_: ParquetRelation) => // OK
+        case LogicalRelation(_: ParquetRelation, _) => // OK
         case _ => fail(
           "test_parquet_ctas should be converted to " +
               s"${classOf[ParquetRelation].getCanonicalName }")
@@ -369,7 +369,7 @@ class ParquetMetastoreSuite extends ParquetPartitioningTest {
 
       assertResult(2) {
         analyzed.collect {
-          case r@LogicalRelation(_: ParquetRelation) => r
+          case r @ LogicalRelation(_: ParquetRelation, _) => r
         }.size
       }
     }
@@ -378,7 +378,7 @@ class ParquetMetastoreSuite extends ParquetPartitioningTest {
   def collectParquetRelation(df: DataFrame): ParquetRelation = {
     val plan = df.queryExecution.analyzed
     plan.collectFirst {
-      case LogicalRelation(r: ParquetRelation) => r
+      case LogicalRelation(r: ParquetRelation, _) => r
     }.getOrElse {
       fail(s"Expecting a ParquetRelation2, but got:\n$plan")
     }
@@ -428,7 +428,7 @@ class ParquetMetastoreSuite extends ParquetPartitioningTest {
       // Converted test_parquet should be cached.
       catalog.cachedDataSourceTables.getIfPresent(tableIdentifier) match {
         case null => fail("Converted test_parquet should be cached in the cache.")
-        case logical @ LogicalRelation(parquetRelation: ParquetRelation) => // OK
+        case logical @ LogicalRelation(parquetRelation: ParquetRelation, _) => // OK
         case other =>
           fail(
             "The cached test_parquet should be a Parquet Relation. " +
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
index d7504936d90e..42b9b3d6340d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
@@ -499,7 +499,7 @@ abstract class HadoopFsRelationTest extends QueryTest with SQLTestUtils with Tes
       }
 
       val actualPaths = df.queryExecution.analyzed.collectFirst {
-        case LogicalRelation(relation: HadoopFsRelation) =>
+        case LogicalRelation(relation: HadoopFsRelation, _) =>
           relation.paths.toSet
       }.getOrElse {
         fail("Expect an FSBasedRelation, but none could be found")

From 8ecba3e86e53834413da8b4299f5791545cae12e Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Sun, 27 Sep 2015 21:16:15 +0100
Subject: [PATCH 104/896] [SPARK-10720] [SQL] [JAVA] Add a java wrapper to
 create a dataframe from a local list of java beans

Similar to SPARK-10630 it would be nice if Java users didn't have to parallelize there data explicitly (as Scala users already can skip). Issue came up in http://stackoverflow.com/questions/32613413/apache-spark-machine-learning-cant-get-estimator-example-to-work

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8879 from holdenk/SPARK-10720-add-a-java-wrapper-to-create-a-dataframe-from-a-local-list-of-java-beans.
---
 .../org/apache/spark/sql/SQLContext.scala     | 51 ++++++++++++++-----
 .../apache/spark/sql/JavaDataFrameSuite.java  | 22 ++++++--
 2 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 1bd4e26fb316..cb0a3e361c97 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql
 
-import java.beans.Introspector
+import java.beans.{BeanInfo, Introspector}
 import java.util.Properties
 import java.util.concurrent.atomic.AtomicReference
 
@@ -499,21 +499,12 @@ class SQLContext(@transient val sparkContext: SparkContext)
    * @since 1.3.0
    */
   def createDataFrame(rdd: RDD[_], beanClass: Class[_]): DataFrame = {
-    val attributeSeq = getSchema(beanClass)
+    val attributeSeq: Seq[AttributeReference] = getSchema(beanClass)
     val className = beanClass.getName
     val rowRdd = rdd.mapPartitions { iter =>
       // BeanInfo is not serializable so we must rediscover it remotely for each partition.
       val localBeanInfo = Introspector.getBeanInfo(Utils.classForName(className))
-      val extractors =
-        localBeanInfo.getPropertyDescriptors.filterNot(_.getName == "class").map(_.getReadMethod)
-      val methodsToConverts = extractors.zip(attributeSeq).map { case (e, attr) =>
-        (e, CatalystTypeConverters.createToCatalystConverter(attr.dataType))
-      }
-      iter.map { row =>
-        new GenericInternalRow(
-          methodsToConverts.map { case (e, convert) => convert(e.invoke(row)) }.toArray[Any]
-        ): InternalRow
-      }
+      SQLContext.beansToRows(iter, localBeanInfo, attributeSeq)
     }
     DataFrame(this, LogicalRDD(attributeSeq, rowRdd)(this))
   }
@@ -530,6 +521,23 @@ class SQLContext(@transient val sparkContext: SparkContext)
     createDataFrame(rdd.rdd, beanClass)
   }
 
+  /**
+   * Applies a schema to an List of Java Beans.
+   *
+   * WARNING: Since there is no guaranteed ordering for fields in a Java Bean,
+   *          SELECT * queries will return the columns in an undefined order.
+   * @group dataframes
+   * @since 1.6.0
+   */
+  def createDataFrame(data: java.util.List[_], beanClass: Class[_]): DataFrame = {
+    val attrSeq = getSchema(beanClass)
+    val className = beanClass.getName
+    val beanInfo = Introspector.getBeanInfo(beanClass)
+    val rows = SQLContext.beansToRows(data.asScala.iterator, beanInfo, attrSeq)
+    DataFrame(self, LocalRelation(attrSeq, rows.toSeq))
+  }
+
+
   /**
    * :: Experimental ::
    * Returns a [[DataFrameReader]] that can be used to read data in as a [[DataFrame]].
@@ -1229,4 +1237,23 @@ object SQLContext {
       lastInstantiatedContext.set(sqlContext)
     }
   }
+
+  /**
+   * Converts an iterator of Java Beans to InternalRow using the provided
+   * bean info & schema. This is not related to the singleton, but is a static
+   * method for internal use.
+   */
+  private def beansToRows(data: Iterator[_], beanInfo: BeanInfo, attrs: Seq[AttributeReference]):
+      Iterator[InternalRow] = {
+    val extractors =
+      beanInfo.getPropertyDescriptors.filterNot(_.getName == "class").map(_.getReadMethod)
+    val methodsToConverts = extractors.zip(attrs).map { case (e, attr) =>
+      (e, CatalystTypeConverters.createToCatalystConverter(attr.dataType))
+    }
+    data.map{ element =>
+      new GenericInternalRow(
+        methodsToConverts.map { case (e, convert) => convert(e.invoke(element)) }.toArray[Any]
+      ): InternalRow
+    }
+  }
 }
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index 250ac2e1092d..a1a3fdbb486e 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -142,11 +142,7 @@ public List<String> getD() {
     }
   }
 
-  @Test
-  public void testCreateDataFrameFromJavaBeans() {
-    Bean bean = new Bean();
-    JavaRDD<Bean> rdd = jsc.parallelize(Arrays.asList(bean));
-    DataFrame df = context.createDataFrame(rdd, Bean.class);
+  void validateDataFrameWithBeans(Bean bean, DataFrame df) {
     StructType schema = df.schema();
     Assert.assertEquals(new StructField("a", DoubleType$.MODULE$, false, Metadata.empty()),
       schema.apply("a"));
@@ -182,6 +178,22 @@ public void testCreateDataFrameFromJavaBeans() {
     }
   }
 
+  @Test
+  public void testCreateDataFrameFromLocalJavaBeans() {
+    Bean bean = new Bean();
+    List<Bean> data = Arrays.asList(bean);
+    DataFrame df = context.createDataFrame(data, Bean.class);
+    validateDataFrameWithBeans(bean, df);
+  }
+
+  @Test
+  public void testCreateDataFrameFromJavaBeans() {
+    Bean bean = new Bean();
+    JavaRDD<Bean> rdd = jsc.parallelize(Arrays.asList(bean));
+    DataFrame df = context.createDataFrame(rdd, Bean.class);
+    validateDataFrameWithBeans(bean, df);
+  }
+
   @Test
   public void testCreateDataFromFromList() {
     StructType schema = createStructType(Arrays.asList(createStructField("i", IntegerType, true)));

From fb4c7be747a35ea733df6010194cd76db449adc9 Mon Sep 17 00:00:00 2001
From: Bin Wang <wbin00@gmail.com>
Date: Sun, 27 Sep 2015 21:26:54 +0100
Subject: [PATCH 105/896] add doc for spark.streaming.stopGracefullyOnShutdown

Author: Bin Wang <wbin00@gmail.com>

Closes #8898 from wb14123/doc.
---
 docs/configuration.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docs/configuration.md b/docs/configuration.md
index 284f97ad09ec..d99092e3c506 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1490,6 +1490,14 @@ Apart from these, the following properties are also available, and may be useful
     higher memory usage in Spark.
   </td>
 </tr>
+<tr>
+  <td><code>spark.streaming.stopGracefullyOnShutdown</code></td>
+  <td>false</td>
+  <td>
+    If <code>true</code>, Spark shuts down the <code>StreamingContext</code> gracefully on JVM 
+    shutdown rather than immediately.
+  </td>
+</tr>
 <tr>
   <td><code>spark.streaming.kafka.maxRatePerPartition</code></td>
   <td>not set</td>

From b58249930d58e2de238c05aaf5fa9315b4c3cbab Mon Sep 17 00:00:00 2001
From: David Martin <dmartinpro@users.noreply.github.com>
Date: Mon, 28 Sep 2015 10:41:39 +0100
Subject: [PATCH 106/896] Fix two mistakes in programming-guide page

seperate -> separate
sees -> see

Author: David Martin <dmartinpro@users.noreply.github.com>

Closes #8928 from dmartinpro/patch-1.
---
 docs/programming-guide.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/programming-guide.md b/docs/programming-guide.md
index 8ad238315f12..22656fd7910c 100644
--- a/docs/programming-guide.md
+++ b/docs/programming-guide.md
@@ -805,9 +805,9 @@ print("Counter value: " + counter)
 
 The primary challenge is that the behavior of the above code is undefined. In local mode with a single JVM, the above code will sum the values within the RDD and store it in **counter**. This is because both the RDD and the variable **counter** are in the same memory space on the driver node.
 
-However, in `cluster` mode, what happens is more complicated, and the above may not work as intended. To execute jobs, Spark breaks up the processing of RDD operations into tasks - each of which is operated on by an executor. Prior to execution, Spark computes the **closure**. The closure is those variables and methods which must be visible for the executor to perform its computations on the RDD (in this case `foreach()`). This closure is serialized and sent to each executor. In `local` mode, there is only the one executors so everything shares the same closure. In other modes however, this is not the case and the executors running on seperate worker nodes each have their own copy of the closure.
+However, in `cluster` mode, what happens is more complicated, and the above may not work as intended. To execute jobs, Spark breaks up the processing of RDD operations into tasks - each of which is operated on by an executor. Prior to execution, Spark computes the **closure**. The closure is those variables and methods which must be visible for the executor to perform its computations on the RDD (in this case `foreach()`). This closure is serialized and sent to each executor. In `local` mode, there is only the one executors so everything shares the same closure. In other modes however, this is not the case and the executors running on separate worker nodes each have their own copy of the closure.
 
-What is happening here is that the variables within the closure sent to each executor are now copies and thus, when **counter** is referenced within the `foreach` function, it's no longer the **counter** on the driver node. There is still a **counter** in the memory of the driver node but this is no longer visible to the executors! The executors only sees the copy from the serialized closure. Thus, the final value of **counter** will still be zero since all operations on **counter** were referencing the value within the serialized closure.  
+What is happening here is that the variables within the closure sent to each executor are now copies and thus, when **counter** is referenced within the `foreach` function, it's no longer the **counter** on the driver node. There is still a **counter** in the memory of the driver node but this is no longer visible to the executors! The executors only see the copy from the serialized closure. Thus, the final value of **counter** will still be zero since all operations on **counter** were referencing the value within the serialized closure.  
 
 To ensure well-defined behavior in these sorts of scenarios one should use an [`Accumulator`](#AccumLink). Accumulators in Spark are used specifically to provide a mechanism for safely updating a variable when execution is split up across worker nodes in a cluster. The Accumulators section of this guide discusses these in more detail.  
 

From d8d50ed388d2e695b69d2b93a620045ef2f0bc18 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Mon, 28 Sep 2015 06:33:45 -0700
Subject: [PATCH 107/896] [SPARK-10812] [YARN] Spark hadoop util support
 switching to yarn

While this is likely not a huge issue for real production systems, for test systems which may setup a Spark Context and tear it down and stand up a Spark Context with a different master (e.g. some local mode & some yarn mode) tests this cane be an issue. Discovered during work on spark-testing-base on Spark 1.4.1, but seems like the logic that triggers it is present in master (see SparkHadoopUtil object). A valid work around for users encountering this issue is to fork a different JVM, however this can be heavy weight.

```
[info] SampleMiniClusterTest:
[info] Exception encountered when attempting to run a suite with class name: com.holdenkarau.spark.testing.SampleMiniClusterTest *** ABORTED ***
[info] java.lang.ClassCastException: org.apache.spark.deploy.SparkHadoopUtil cannot be cast to org.apache.spark.deploy.yarn.YarnSparkHadoopUtil
[info] at org.apache.spark.deploy.yarn.YarnSparkHadoopUtil$.get(YarnSparkHadoopUtil.scala:163)
[info] at org.apache.spark.deploy.yarn.Client.prepareLocalResources(Client.scala:257)
[info] at org.apache.spark.deploy.yarn.Client.createContainerLaunchContext(Client.scala:561)
[info] at org.apache.spark.deploy.yarn.Client.submitApplication(Client.scala:115)
[info] at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.start(YarnClientSchedulerBackend.scala:57)
[info] at org.apache.spark.scheduler.TaskSchedulerImpl.start(TaskSchedulerImpl.scala:141)
[info] at org.apache.spark.SparkContext.<init>(SparkContext.scala:497)
[info] at com.holdenkarau.spark.testing.SharedMiniCluster$class.setup(SharedMiniCluster.scala:186)
[info] at com.holdenkarau.spark.testing.SampleMiniClusterTest.setup(SampleMiniClusterTest.scala:26)
[info] at com.holdenkarau.spark.testing.SharedMiniCluster$class.beforeAll(SharedMiniCluster.scala:103)
```

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8911 from holdenk/SPARK-10812-spark-hadoop-util-support-switching-to-yarn.
---
 .../scala/org/apache/spark/SparkContext.scala |  2 ++
 .../apache/spark/deploy/SparkHadoopUtil.scala | 30 +++++++++----------
 .../org/apache/spark/deploy/yarn/Client.scala |  6 +++-
 .../yarn/YarnSparkHadoopUtilSuite.scala       | 12 ++++++++
 4 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index bf3aeb488d59..0c72adfb9505 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1756,6 +1756,8 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
       }
       SparkEnv.set(null)
     }
+    // Unset YARN mode system env variable, to allow switching between cluster types.
+    System.clearProperty("SPARK_YARN_MODE")
     SparkContext.clearActiveContext()
     logInfo("Successfully stopped SparkContext")
   }
diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala b/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
index a0b7365df900..d606b80c03c9 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
@@ -385,20 +385,13 @@ class SparkHadoopUtil extends Logging {
 
 object SparkHadoopUtil {
 
-  private val hadoop = {
-    val yarnMode = java.lang.Boolean.valueOf(
-        System.getProperty("SPARK_YARN_MODE", System.getenv("SPARK_YARN_MODE")))
-    if (yarnMode) {
-      try {
-        Utils.classForName("org.apache.spark.deploy.yarn.YarnSparkHadoopUtil")
-          .newInstance()
-          .asInstanceOf[SparkHadoopUtil]
-      } catch {
-       case e: Exception => throw new SparkException("Unable to load YARN support", e)
-      }
-    } else {
-      new SparkHadoopUtil
-    }
+  private lazy val hadoop = new SparkHadoopUtil
+  private lazy val yarn = try {
+    Utils.classForName("org.apache.spark.deploy.yarn.YarnSparkHadoopUtil")
+      .newInstance()
+      .asInstanceOf[SparkHadoopUtil]
+  } catch {
+    case e: Exception => throw new SparkException("Unable to load YARN support", e)
   }
 
   val SPARK_YARN_CREDS_TEMP_EXTENSION = ".tmp"
@@ -406,6 +399,13 @@ object SparkHadoopUtil {
   val SPARK_YARN_CREDS_COUNTER_DELIM = "-"
 
   def get: SparkHadoopUtil = {
-    hadoop
+    // Check each time to support changing to/from YARN
+    val yarnMode = java.lang.Boolean.valueOf(
+        System.getProperty("SPARK_YARN_MODE", System.getenv("SPARK_YARN_MODE")))
+    if (yarnMode) {
+      yarn
+    } else {
+      hadoop
+    }
   }
 }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index a2c4bc2f5480..8c53c24a79c4 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -86,7 +86,11 @@ private[spark] class Client(
   private val fireAndForget = isClusterMode &&
     !sparkConf.getBoolean("spark.yarn.submit.waitAppCompletion", true)
 
-  def stop(): Unit = yarnClient.stop()
+  def stop(): Unit = {
+    yarnClient.stop()
+    // Unset YARN mode system env variable, to allow switching between cluster types.
+    System.clearProperty("SPARK_YARN_MODE")
+  }
 
   /**
    * Submit an application running our ApplicationMaster to the ResourceManager.
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
index 49bee0866dd4..e1c67db76571 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
@@ -30,6 +30,7 @@ import org.scalatest.Matchers
 import org.apache.hadoop.yarn.api.records.ApplicationAccessType
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkException, SparkFunSuite}
+import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.util.Utils
 
 
@@ -233,4 +234,15 @@ class YarnSparkHadoopUtilSuite extends SparkFunSuite with Matchers with Logging
       }
     assert(caught.getMessage === "Can't get Master Kerberos principal for use as renewer")
   }
+
+  test("check different hadoop utils based on env variable") {
+    try {
+      System.setProperty("SPARK_YARN_MODE", "true")
+      assert(SparkHadoopUtil.get.getClass === classOf[YarnSparkHadoopUtil])
+      System.setProperty("SPARK_YARN_MODE", "false")
+      assert(SparkHadoopUtil.get.getClass === classOf[SparkHadoopUtil])
+    } finally {
+      System.clearProperty("SPARK_YARN_MODE")
+    }
+  }
 }

From 353c30bd7dfbd3b76fc8bc9a6dfab9321439a34b Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 28 Sep 2015 06:38:54 -0700
Subject: [PATCH 108/896] [SPARK-10790] [YARN] Fix initial executor number not
 set issue and consolidate the codes

This bug is introduced in [SPARK-9092](https://issues.apache.org/jira/browse/SPARK-9092), `targetExecutorNumber` should use `minExecutors` if `initialExecutors` is not set. Using 0 instead will meet the problem as mentioned in [SPARK-10790](https://issues.apache.org/jira/browse/SPARK-10790).

Also consolidate and simplify some similar code snippets to keep the consistent semantics.

Author: jerryshao <sshao@hortonworks.com>

Closes #8910 from jerryshao/SPARK-10790.
---
 .../spark/deploy/yarn/ClientArguments.scala   | 20 +---------------
 .../spark/deploy/yarn/YarnAllocator.scala     |  6 +----
 .../deploy/yarn/YarnSparkHadoopUtil.scala     | 23 +++++++++++++++++++
 .../cluster/YarnClusterSchedulerBackend.scala | 18 ++-------------
 4 files changed, 27 insertions(+), 40 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
index 54f62e6b723a..1165061db21e 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
@@ -81,25 +81,7 @@ private[spark] class ClientArguments(args: Array[String], sparkConf: SparkConf)
       .orNull
     // If dynamic allocation is enabled, start at the configured initial number of executors.
     // Default to minExecutors if no initialExecutors is set.
-    if (isDynamicAllocationEnabled) {
-      val minExecutorsConf = "spark.dynamicAllocation.minExecutors"
-      val initialExecutorsConf = "spark.dynamicAllocation.initialExecutors"
-      val maxExecutorsConf = "spark.dynamicAllocation.maxExecutors"
-      val minNumExecutors = sparkConf.getInt(minExecutorsConf, 0)
-      val initialNumExecutors = sparkConf.getInt(initialExecutorsConf, minNumExecutors)
-      val maxNumExecutors = sparkConf.getInt(maxExecutorsConf, Integer.MAX_VALUE)
-
-      // If defined, initial executors must be between min and max
-      if (initialNumExecutors < minNumExecutors || initialNumExecutors > maxNumExecutors) {
-        throw new IllegalArgumentException(
-          s"$initialExecutorsConf must be between $minExecutorsConf and $maxNumExecutors!")
-      }
-
-      numExecutors = initialNumExecutors
-    } else {
-      val numExecutorsConf = "spark.executor.instances"
-      numExecutors = sparkConf.getInt(numExecutorsConf, numExecutors)
-    }
+    numExecutors = YarnSparkHadoopUtil.getInitialTargetExecutorNumber(sparkConf)
     principal = Option(principal)
       .orElse(sparkConf.getOption("spark.yarn.principal"))
       .orNull
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index fd88b8b7fe3b..9e1ef1b3b422 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -89,11 +89,7 @@ private[yarn] class YarnAllocator(
   @volatile private var numExecutorsFailed = 0
 
   @volatile private var targetNumExecutors =
-    if (Utils.isDynamicAllocationEnabled(sparkConf)) {
-      sparkConf.getInt("spark.dynamicAllocation.initialExecutors", 0)
-    } else {
-      sparkConf.getInt("spark.executor.instances", YarnSparkHadoopUtil.DEFAULT_NUMBER_EXECUTORS)
-    }
+    YarnSparkHadoopUtil.getInitialTargetExecutorNumber(sparkConf)
 
   // Executor loss reason requests that are pending - maps from executor ID for inquiry to a
   // list of requesters that should be responded to once we find out why the given executor
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
index 445d3dcd266d..f276e7efde9d 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
@@ -314,5 +314,28 @@ object YarnSparkHadoopUtil {
   def getClassPathSeparator(): String = {
     classPathSeparatorField.get(null).asInstanceOf[String]
   }
+
+  /**
+   * Getting the initial target number of executors depends on whether dynamic allocation is
+   * enabled.
+   */
+  def getInitialTargetExecutorNumber(conf: SparkConf): Int = {
+    if (Utils.isDynamicAllocationEnabled(conf)) {
+      val minNumExecutors = conf.getInt("spark.dynamicAllocation.minExecutors", 0)
+      val initialNumExecutors =
+        conf.getInt("spark.dynamicAllocation.initialExecutors", minNumExecutors)
+      val maxNumExecutors = conf.getInt("spark.dynamicAllocation.maxExecutors", Int.MaxValue)
+      require(initialNumExecutors >= minNumExecutors && initialNumExecutors <= maxNumExecutors,
+        s"initial executor number $initialNumExecutors must between min executor number" +
+          s"$minNumExecutors and max executor number $maxNumExecutors")
+
+      initialNumExecutors
+    } else {
+      val targetNumExecutors =
+        sys.env.get("SPARK_EXECUTOR_INSTANCES").map(_.toInt).getOrElse(DEFAULT_NUMBER_EXECUTORS)
+      // System property can override environment variable.
+      conf.getInt("spark.executor.instances", targetNumExecutors)
+    }
+  }
 }
 
diff --git a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala
index 1aed5a167507..50b699f11b21 100644
--- a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala
+++ b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClusterSchedulerBackend.scala
@@ -17,21 +17,13 @@
 
 package org.apache.spark.scheduler.cluster
 
-import java.net.NetworkInterface
-
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
-
-import scala.collection.JavaConverters._
-
-import org.apache.hadoop.yarn.api.records.NodeState
-import org.apache.hadoop.yarn.client.api.YarnClient
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 
 import org.apache.spark.SparkContext
 import org.apache.spark.deploy.yarn.YarnSparkHadoopUtil
-import org.apache.spark.deploy.yarn.YarnSparkHadoopUtil._
 import org.apache.spark.scheduler.TaskSchedulerImpl
-import org.apache.spark.util.{IntParam, Utils}
+import org.apache.spark.util.Utils
 
 private[spark] class YarnClusterSchedulerBackend(
     scheduler: TaskSchedulerImpl,
@@ -40,13 +32,7 @@ private[spark] class YarnClusterSchedulerBackend(
 
   override def start() {
     super.start()
-    totalExpectedExecutors = DEFAULT_NUMBER_EXECUTORS
-    if (System.getenv("SPARK_EXECUTOR_INSTANCES") != null) {
-      totalExpectedExecutors = IntParam.unapply(System.getenv("SPARK_EXECUTOR_INSTANCES"))
-        .getOrElse(totalExpectedExecutors)
-    }
-    // System property can override environment variable.
-    totalExpectedExecutors = sc.getConf.getInt("spark.executor.instances", totalExpectedExecutors)
+    totalExpectedExecutors = YarnSparkHadoopUtil.getInitialTargetExecutorNumber(sc.conf)
   }
 
   override def applicationId(): String =

From 14978b785a43e0c13c8bdfd52d20cc8984984ba3 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Mon, 28 Sep 2015 13:53:45 -0700
Subject: [PATCH 109/896] [SPARK-10395] [SQL] Simplifies CatalystReadSupport

Please refer to [SPARK-10395] [1] for details.

[1]: https://issues.apache.org/jira/browse/SPARK-10395

Author: Cheng Lian <lian@databricks.com>

Closes #8553 from liancheng/spark-10395/simplify-parquet-read-support.
---
 .../parquet/CatalystReadSupport.scala         | 92 +++++++++----------
 1 file changed, 45 insertions(+), 47 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
index 8c819f1a48cd..9502b835a54d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.execution.datasources.parquet
 
 import java.util.{Map => JMap}
 
-import scala.collection.JavaConverters.{collectionAsScalaIterableConverter, mapAsJavaMapConverter, mapAsScalaMapConverter}
+import scala.collection.JavaConverters._
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.parquet.hadoop.api.ReadSupport.ReadContext
@@ -29,34 +29,62 @@ import org.apache.parquet.schema.Type.Repetition
 import org.apache.parquet.schema._
 
 import org.apache.spark.Logging
+import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types._
 
+/**
+ * A Parquet [[ReadSupport]] implementation for reading Parquet records as Catalyst
+ * [[InternalRow]]s.
+ *
+ * The API interface of [[ReadSupport]] is a little bit over complicated because of historical
+ * reasons.  In older versions of parquet-mr (say 1.6.0rc3 and prior), [[ReadSupport]] need to be
+ * instantiated and initialized twice on both driver side and executor side.  The [[init()]] method
+ * is for driver side initialization, while [[prepareForRead()]] is for executor side.  However,
+ * starting from parquet-mr 1.6.0, it's no longer the case, and [[ReadSupport]] is only instantiated
+ * and initialized on executor side.  So, theoretically, now it's totally fine to combine these two
+ * methods into a single initialization method.  The only reason (I could think of) to still have
+ * them here is for parquet-mr API backwards-compatibility.
+ *
+ * Due to this reason, we no longer rely on [[ReadContext]] to pass requested schema from [[init()]]
+ * to [[prepareForRead()]], but use a private `var` for simplicity.
+ */
 private[parquet] class CatalystReadSupport extends ReadSupport[InternalRow] with Logging {
-  // Called after `init()` when initializing Parquet record reader.
+  private var catalystRequestedSchema: StructType = _
+
+  /**
+   * Called on executor side before [[prepareForRead()]] and instantiating actual Parquet record
+   * readers.  Responsible for figuring out Parquet requested schema used for column pruning.
+   */
+  override def init(context: InitContext): ReadContext = {
+    catalystRequestedSchema = {
+      // scalastyle:off jobcontext
+      val conf = context.getConfiguration
+      // scalastyle:on jobcontext
+      val schemaString = conf.get(CatalystReadSupport.SPARK_ROW_REQUESTED_SCHEMA)
+      assert(schemaString != null, "Parquet requested schema not set.")
+      StructType.fromString(schemaString)
+    }
+
+    val parquetRequestedSchema =
+      CatalystReadSupport.clipParquetSchema(context.getFileSchema, catalystRequestedSchema)
+
+    new ReadContext(parquetRequestedSchema, Map.empty[String, String].asJava)
+  }
+
+  /**
+   * Called on executor side after [[init()]], before instantiating actual Parquet record readers.
+   * Responsible for instantiating [[RecordMaterializer]], which is used for converting Parquet
+   * records to Catalyst [[InternalRow]]s.
+   */
   override def prepareForRead(
       conf: Configuration,
       keyValueMetaData: JMap[String, String],
       fileSchema: MessageType,
       readContext: ReadContext): RecordMaterializer[InternalRow] = {
     log.debug(s"Preparing for read Parquet file with message type: $fileSchema")
-
-    val toCatalyst = new CatalystSchemaConverter(conf)
     val parquetRequestedSchema = readContext.getRequestedSchema
 
-    val catalystRequestedSchema =
-      Option(readContext.getReadSupportMetadata).map(_.asScala).flatMap { metadata =>
-        metadata
-          // First tries to read requested schema, which may result from projections
-          .get(CatalystReadSupport.SPARK_ROW_REQUESTED_SCHEMA)
-          // If not available, tries to read Catalyst schema from file metadata.  It's only
-          // available if the target file is written by Spark SQL.
-          .orElse(metadata.get(CatalystReadSupport.SPARK_METADATA_KEY))
-      }.map(StructType.fromString).getOrElse {
-        logInfo("Catalyst schema not available, falling back to Parquet schema")
-        toCatalyst.convert(parquetRequestedSchema)
-      }
-
     logInfo {
       s"""Going to read the following fields from the Parquet file:
          |
@@ -69,36 +97,6 @@ private[parquet] class CatalystReadSupport extends ReadSupport[InternalRow] with
 
     new CatalystRecordMaterializer(parquetRequestedSchema, catalystRequestedSchema)
   }
-
-  // Called before `prepareForRead()` when initializing Parquet record reader.
-  override def init(context: InitContext): ReadContext = {
-    val conf = {
-      // scalastyle:off jobcontext
-      context.getConfiguration
-      // scalastyle:on jobcontext
-    }
-
-    // If the target file was written by Spark SQL, we should be able to find a serialized Catalyst
-    // schema of this file from its metadata.
-    val maybeRowSchema = Option(conf.get(RowWriteSupport.SPARK_ROW_SCHEMA))
-
-    // Optional schema of requested columns, in the form of a string serialized from a Catalyst
-    // `StructType` containing all requested columns.
-    val maybeRequestedSchema = Option(conf.get(CatalystReadSupport.SPARK_ROW_REQUESTED_SCHEMA))
-
-    val parquetRequestedSchema =
-      maybeRequestedSchema.fold(context.getFileSchema) { schemaString =>
-        val catalystRequestedSchema = StructType.fromString(schemaString)
-        CatalystReadSupport.clipParquetSchema(context.getFileSchema, catalystRequestedSchema)
-      }
-
-    val metadata =
-      Map.empty[String, String] ++
-        maybeRequestedSchema.map(CatalystReadSupport.SPARK_ROW_REQUESTED_SCHEMA -> _) ++
-        maybeRowSchema.map(RowWriteSupport.SPARK_ROW_SCHEMA -> _)
-
-    new ReadContext(parquetRequestedSchema, metadata.asJava)
-  }
 }
 
 private[parquet] object CatalystReadSupport {

From ea02e5513a8f9853094d5612c962fc8c1a340f50 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 28 Sep 2015 14:40:40 -0700
Subject: [PATCH 110/896] [SPARK-10859] [SQL] fix stats of StringType in
 columnar cache

The UTF8String may come from UnsafeRow, then underline buffer of it is not copied, so we should clone it in order to hold it in Stats.

cc yhuai

Author: Davies Liu <davies@databricks.com>

Closes #8929 from davies/pushdown_string.
---
 .../scala/org/apache/spark/sql/columnar/ColumnStats.scala  | 4 ++--
 .../spark/sql/columnar/InMemoryColumnarQuerySuite.scala    | 7 +++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
index 5cbd52bc0590..fbd51b7c34c8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
@@ -213,8 +213,8 @@ private[sql] class StringColumnStats extends ColumnStats {
     super.gatherStats(row, ordinal)
     if (!row.isNullAt(ordinal)) {
       val value = row.getUTF8String(ordinal)
-      if (upper == null || value.compareTo(upper) > 0) upper = value
-      if (lower == null || value.compareTo(lower) < 0) lower = value
+      if (upper == null || value.compareTo(upper) > 0) upper = value.clone()
+      if (lower == null || value.compareTo(lower) < 0) lower = value.clone()
       sizeInBytes += STRING.actualSize(row, ordinal)
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
index cd3644eb9c09..ea5dd2be33d6 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
@@ -212,4 +212,11 @@ class InMemoryColumnarQuerySuite extends QueryTest with SharedSQLContext {
     // Drop the cache.
     cached.unpersist()
   }
+
+  test("SPARK-10859: Predicates pushed to InMemoryColumnarTableScan are not evaluated correctly") {
+    val data = sqlContext.range(10).selectExpr("id", "cast(id as string) as s")
+    data.cache()
+    assert(data.count() === 10)
+    assert(data.filter($"s" === "3").count() === 1)
+  }
 }

From bf4199e261c3c8dd2970e2a154c97b46fb339f02 Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Mon, 28 Sep 2015 22:56:43 -0400
Subject: [PATCH 111/896] [SPARK-10833] [BUILD] Inline, organize BSD/MIT
 licenses in LICENSE

In the course of https://issues.apache.org/jira/browse/LEGAL-226 it came to light that the guidance at http://www.apache.org/dev/licensing-howto.html#permissive-deps means that permissively-licensed dependencies has a different interpretation than we (er, I) had been operating under. "pointer ... to the license within the source tree" specifically means a copy of the license within Spark's distribution, whereas at the moment, Spark's LICENSE has a pointer to the project's license in the other project's source tree.

The remedy is simply to inline all such license references (i.e. BSD/MIT licenses) or include their text in "licenses" subdirectory and point to that.

Along the way, we can also treat other BSD/MIT licenses, whose text has been inlined into LICENSE, in the same way.

The LICENSE file can continue to provide a helpful list of BSD/MIT licensed projects and a pointer to their sites. This would be over and above including license text in the distro, which is the essential thing.

Author: Sean Owen <sowen@cloudera.com>

Closes #8919 from srowen/SPARK-10833.
---
 LICENSE                                       | 699 +-----------------
 NOTICE                                        |  35 +
 .../apache/spark/util/collection/TimSort.java |  18 +
 licenses/LICENSE-AnchorJS.txt                 |  21 +
 licenses/LICENSE-DPark.txt                    |  30 +
 licenses/LICENSE-Mockito.txt                  |  21 +
 licenses/LICENSE-SnapTree.txt                 |  35 +
 licenses/LICENSE-antlr.txt                    |   8 +
 licenses/LICENSE-boto.txt                     |  20 +
 licenses/LICENSE-cloudpickle.txt              |  28 +
 licenses/LICENSE-d3.min.js.txt                |  26 +
 licenses/LICENSE-dagre-d3.txt                 |  19 +
 licenses/LICENSE-f2j.txt                      |   8 +
 licenses/LICENSE-graphlib-dot.txt             |  19 +
 licenses/LICENSE-heapq.txt                    | 280 +++++++
 licenses/LICENSE-javolution.txt               |  27 +
 licenses/LICENSE-jbcrypt.txt                  |  17 +
 licenses/LICENSE-jblas.txt                    |  31 +
 licenses/LICENSE-jline.txt                    |  32 +
 licenses/LICENSE-jpmml-model.txt              |  10 +
 licenses/LICENSE-jquery.txt                   |   9 +
 licenses/LICENSE-junit-interface.txt          |  24 +
 licenses/LICENSE-kryo.txt                     |  10 +
 licenses/LICENSE-minlog.txt                   |  10 +
 licenses/LICENSE-netlib.txt                   |  49 ++
 licenses/LICENSE-paranamer.txt                |  28 +
 licenses/LICENSE-protobuf.txt                 |  42 ++
 licenses/LICENSE-py4j.txt                     |  27 +
 licenses/LICENSE-pyrolite.txt                 |  28 +
 licenses/LICENSE-reflectasm.txt               |  10 +
 licenses/LICENSE-sbt-launch-lib.txt           |  26 +
 licenses/LICENSE-scala.txt                    |  30 +
 licenses/LICENSE-scalacheck.txt               |  32 +
 licenses/LICENSE-scopt.txt                    |  21 +
 licenses/LICENSE-slf4j.txt                    |  21 +
 licenses/LICENSE-sorttable.js.txt             |  16 +
 licenses/LICENSE-spire.txt                    |  19 +
 licenses/LICENSE-xmlenc.txt                   |  27 +
 make-distribution.sh                          |   1 +
 .../network/util/LimitedInputStream.java      |  18 +
 40 files changed, 1153 insertions(+), 679 deletions(-)
 create mode 100644 licenses/LICENSE-AnchorJS.txt
 create mode 100644 licenses/LICENSE-DPark.txt
 create mode 100644 licenses/LICENSE-Mockito.txt
 create mode 100644 licenses/LICENSE-SnapTree.txt
 create mode 100644 licenses/LICENSE-antlr.txt
 create mode 100644 licenses/LICENSE-boto.txt
 create mode 100644 licenses/LICENSE-cloudpickle.txt
 create mode 100644 licenses/LICENSE-d3.min.js.txt
 create mode 100644 licenses/LICENSE-dagre-d3.txt
 create mode 100644 licenses/LICENSE-f2j.txt
 create mode 100644 licenses/LICENSE-graphlib-dot.txt
 create mode 100644 licenses/LICENSE-heapq.txt
 create mode 100644 licenses/LICENSE-javolution.txt
 create mode 100644 licenses/LICENSE-jbcrypt.txt
 create mode 100644 licenses/LICENSE-jblas.txt
 create mode 100644 licenses/LICENSE-jline.txt
 create mode 100644 licenses/LICENSE-jpmml-model.txt
 create mode 100644 licenses/LICENSE-jquery.txt
 create mode 100644 licenses/LICENSE-junit-interface.txt
 create mode 100644 licenses/LICENSE-kryo.txt
 create mode 100644 licenses/LICENSE-minlog.txt
 create mode 100644 licenses/LICENSE-netlib.txt
 create mode 100644 licenses/LICENSE-paranamer.txt
 create mode 100644 licenses/LICENSE-protobuf.txt
 create mode 100644 licenses/LICENSE-py4j.txt
 create mode 100644 licenses/LICENSE-pyrolite.txt
 create mode 100644 licenses/LICENSE-reflectasm.txt
 create mode 100644 licenses/LICENSE-sbt-launch-lib.txt
 create mode 100644 licenses/LICENSE-scala.txt
 create mode 100644 licenses/LICENSE-scalacheck.txt
 create mode 100644 licenses/LICENSE-scopt.txt
 create mode 100644 licenses/LICENSE-slf4j.txt
 create mode 100644 licenses/LICENSE-sorttable.js.txt
 create mode 100644 licenses/LICENSE-spire.txt
 create mode 100644 licenses/LICENSE-xmlenc.txt

diff --git a/LICENSE b/LICENSE
index f9e412cade34..dca03ab16de2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -211,712 +211,45 @@ subcomponents is subject to the terms and conditions of the following
 licenses.
 
 
-=======================================================================
-For the Boto EC2 library (ec2/third_party/boto*.zip):
-=======================================================================
-
-Copyright (c) 2006-2008 Mitch Garnaat http://garnaat.org/
-
-Permission is hereby granted, free of charge, to any person obtaining a
-copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish, dis-
-tribute, sublicense, and/or sell copies of the Software, and to permit
-persons to whom the Software is furnished to do so, subject to the fol-
-lowing conditions:
-
-The above copyright notice and this permission notice shall be included
-in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
-ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
-SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
-WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
-IN THE SOFTWARE.
-
-
-========================================================================
-For CloudPickle (pyspark/cloudpickle.py):
-========================================================================
-
-Copyright (c) 2012, Regents of the University of California.
-Copyright (c) 2009 `PiCloud, Inc. <http://www.picloud.com>`_.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-    * Redistributions of source code must retain the above copyright
-      notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-      notice, this list of conditions and the following disclaimer in the
-      documentation and/or other materials provided with the distribution.
-    * Neither the name of the University of California, Berkeley nor the
-      names of its contributors may be used to endorse or promote
-      products derived from this software without specific prior written
-      permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
-TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-========================================================================
-For Py4J (python/lib/py4j-0.8.2.1-src.zip)
-========================================================================
-
-Copyright (c) 2009-2011, Barthelemy Dagenais All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
-- Redistributions of source code must retain the above copyright notice, this
-list of conditions and the following disclaimer.
-
-- Redistributions in binary form must reproduce the above copyright notice,
-this list of conditions and the following disclaimer in the documentation
-and/or other materials provided with the distribution.
-
-- The name of the author may not be used to endorse or promote products
-derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
-
-
-========================================================================
-For DPark join code (python/pyspark/join.py):
-========================================================================
-
-Copyright (c) 2011, Douban Inc. <http://www.douban.com/>
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
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-copyright notice, this list of conditions and the following disclaimer
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-contributors may be used to endorse or promote products derived from
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-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
 ========================================================================
 For heapq (pyspark/heapq3.py):
 ========================================================================
 
-# A. HISTORY OF THE SOFTWARE
-# ==========================
-#
-# Python was created in the early 1990s by Guido van Rossum at Stichting
-# Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
-# as a successor of a language called ABC.  Guido remains Python's
-# principal author, although it includes many contributions from others.
-#
-# In 1995, Guido continued his work on Python at the Corporation for
-#     National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
-# in Reston, Virginia where he released several versions of the
-# software.
-#
-# In May 2000, Guido and the Python core development team moved to
-# BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
-# year, the PythonLabs team moved to Digital Creations (now Zope
-# Corporation, see http://www.zope.com).  In 2001, the Python Software
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-# non-profit organization created specifically to own Python-related
-# Intellectual Property.  Zope Corporation is a sponsoring member of
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-# All Python releases are Open Source (see http://www.opensource.org for
-# the Open Source Definition).  Historically, most, but not all, Python
-# releases have also been GPL-compatible; the table below summarizes
-# the various releases.
-#
-# Release         Derived     Year        Owner       GPL-
-# from                                compatible? (1)
-#
-# 0.9.0 thru 1.2              1991-1995   CWI         yes
-# 1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
-# 1.6             1.5.2       2000        CNRI        no
-# 2.0             1.6         2000        BeOpen.com  no
-# 1.6.1           1.6         2001        CNRI        yes (2)
-# 2.1             2.0+1.6.1   2001        PSF         no
-# 2.0.1           2.0+1.6.1   2001        PSF         yes
-# 2.1.1           2.1+2.0.1   2001        PSF         yes
-# 2.2             2.1.1       2001        PSF         yes
-# 2.1.2           2.1.1       2002        PSF         yes
-# 2.1.3           2.1.2       2002        PSF         yes
-# 2.2.1           2.2         2002        PSF         yes
-# 2.2.2           2.2.1       2002        PSF         yes
-# 2.2.3           2.2.2       2003        PSF         yes
-# 2.3             2.2.2       2002-2003   PSF         yes
-# 2.3.1           2.3         2002-2003   PSF         yes
-# 2.3.2           2.3.1       2002-2003   PSF         yes
-# 2.3.3           2.3.2       2002-2003   PSF         yes
-# 2.3.4           2.3.3       2004        PSF         yes
-# 2.3.5           2.3.4       2005        PSF         yes
-# 2.4             2.3         2004        PSF         yes
-# 2.4.1           2.4         2005        PSF         yes
-# 2.4.2           2.4.1       2005        PSF         yes
-# 2.4.3           2.4.2       2006        PSF         yes
-# 2.4.4           2.4.3       2006        PSF         yes
-# 2.5             2.4         2006        PSF         yes
-# 2.5.1           2.5         2007        PSF         yes
-# 2.5.2           2.5.1       2008        PSF         yes
-# 2.5.3           2.5.2       2008        PSF         yes
-# 2.6             2.5         2008        PSF         yes
-# 2.6.1           2.6         2008        PSF         yes
-# 2.6.2           2.6.1       2009        PSF         yes
-# 2.6.3           2.6.2       2009        PSF         yes
-# 2.6.4           2.6.3       2009        PSF         yes
-# 2.6.5           2.6.4       2010        PSF         yes
-# 2.7             2.6         2010        PSF         yes
-#
-# Footnotes:
-#
-# (1) GPL-compatible doesn't mean that we're distributing Python under
-# the GPL.  All Python licenses, unlike the GPL, let you distribute
-# a modified version without making your changes open source.  The
-# GPL-compatible licenses make it possible to combine Python with
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-# (2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
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-# CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
-# is "not incompatible" with the GPL.
-#
-# Thanks to the many outside volunteers who have worked under Guido's
-# direction to make these releases possible.
-#
-#
-# B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
-# ===============================================================
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-# PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
-# --------------------------------------------
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-# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-========================================================================
-For sorttable (core/src/main/resources/org/apache/spark/ui/static/sorttable.js):
-========================================================================
-
-Copyright (c) 1997-2007 Stuart Langridge
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
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-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
-========================================================================
-For d3 (core/src/main/resources/org/apache/spark/ui/static/d3.min.js):
-========================================================================
-
-Copyright (c) 2010-2015, Michael Bostock
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
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-* Redistributions of source code must retain the above copyright notice, this
-  list of conditions and the following disclaimer.
-
-* Redistributions in binary form must reproduce the above copyright notice,
-  this list of conditions and the following disclaimer in the documentation
-  and/or other materials provided with the distribution.
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-* The name Michael Bostock may not be used to endorse or promote products
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-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-========================================================================
-For Scala Interpreter classes (all .scala files in repl/src/main/scala
-except for Main.Scala, SparkHelper.scala and ExecutorClassLoader.scala),
-and for SerializableMapWrapper in JavaUtils.scala:
-========================================================================
-
-Copyright (c) 2002-2013 EPFL
-Copyright (c) 2011-2013 Typesafe, Inc.
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-modification, are permitted provided that the following conditions are met:
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-- Redistributions of source code must retain the above copyright notice,
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-- Redistributions in binary form must reproduce the above copyright notice,
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-- Neither the name of the EPFL nor the names of its contributors may be
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-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
-
-
-========================================================================
-For sbt and sbt-launch-lib.bash in sbt/:
-========================================================================
-
-// Generated from http://www.opensource.org/licenses/bsd-license.php
-Copyright (c) 2011, Paul Phillips.
-All rights reserved.
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-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
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-    * Redistributions of source code must retain the above copyright notice,
-      this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright notice,
-      this list of conditions and the following disclaimer in the documentation
-      and/or other materials provided with the distribution.
-    * Neither the name of the author nor the names of its contributors may be
-      used to endorse or promote products derived from this software without
-      specific prior written permission.
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-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+See license/LICENSE-heapq.txt
 
 ========================================================================
 For SnapTree:
 ========================================================================
 
-SNAPTREE LICENSE
-
-Copyright (c) 2009-2012 Stanford University, unless otherwise specified.
-All rights reserved.
-
-This software was developed by the Pervasive Parallelism Laboratory of
-Stanford University, California, USA.
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-Permission to use, copy, modify, and distribute this software in source
-or binary form for any purpose with or without fee is hereby granted,
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-CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGE.
-
-
-========================================================================
-For Timsort (core/src/main/java/org/apache/spark/util/collection/TimSort.java):
-========================================================================
-Copyright (C) 2008 The Android Open Source Project
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
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-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-========================================================================
-For TestTimSort (core/src/test/java/org/apache/spark/util/collection/TestTimSort.java):
-========================================================================
-Copyright (C) 2015 Stijn de Gouw
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
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-  http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-========================================================================
-For LimitedInputStream
-  (network/common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java):
-========================================================================
-Copyright (C) 2007 The Guava Authors
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-========================================================================
-For vis.js (core/src/main/resources/org/apache/spark/ui/static/vis.min.js):
-========================================================================
-Copyright (C) 2010-2015 Almende B.V.
-
-Vis.js is dual licensed under both
-
-  * The Apache 2.0 License
-    http://www.apache.org/licenses/LICENSE-2.0
-
-and
-
-  * The MIT License
-    http://opensource.org/licenses/MIT
-
-Vis.js may be distributed under either license.
+See license/LICENSE-SnapTree.txt
 
 ========================================================================
-For dagre-d3 (core/src/main/resources/org/apache/spark/ui/static/dagre-d3.min.js):
+For jbcrypt:
 ========================================================================
-Copyright (c) 2013 Chris Pettitt
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
 
-========================================================================
-For graphlib-dot (core/src/main/resources/org/apache/spark/ui/static/graphlib-dot.min.js):
-========================================================================
-Copyright (c) 2012-2013 Chris Pettitt
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
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-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+See license/LICENSE-jbcrypt.txt
 
 ========================================================================
 BSD-style licenses
 ========================================================================
 
 The following components are provided under a BSD-style license. See project link for details.
+The text of each license is also included at licenses/LICENSE-[project].txt.
 
-     (BSD 3 Clause) core (com.github.fommil.netlib:core:1.1.2 - https://github.com/fommil/netlib-java/core)
+     (BSD 3 Clause) netlib core (com.github.fommil.netlib:core:1.1.2 - https://github.com/fommil/netlib-java/core)
      (BSD 3 Clause) JPMML-Model (org.jpmml:pmml-model:1.1.15 - https://github.com/jpmml/jpmml-model)
      (BSD 3-clause style license) jblas (org.jblas:jblas:1.2.4 - http://jblas.org/)
      (BSD License) AntLR Parser Generator (antlr:antlr:2.7.7 - http://www.antlr.org/)
-     (BSD License) Javolution (javolution:javolution:5.5.1 - http://javolution.org)
      (BSD licence) ANTLR ST4 4.0.4 (org.antlr:ST4:4.0.4 - http://www.stringtemplate.org)
      (BSD licence) ANTLR StringTemplate (org.antlr:stringtemplate:3.2.1 - http://www.stringtemplate.org)
-     (BSD style) Hamcrest Core (org.hamcrest:hamcrest-core:1.1 - no url defined)
+     (BSD License) Javolution (javolution:javolution:5.5.1 - http://javolution.org)
      (BSD) JLine (jline:jline:0.9.94 - http://jline.sourceforge.net)
      (BSD) ParaNamer Core (com.thoughtworks.paranamer:paranamer:2.3 - http://paranamer.codehaus.org/paranamer)
      (BSD) ParaNamer Core (com.thoughtworks.paranamer:paranamer:2.6 - http://paranamer.codehaus.org/paranamer)
-     (BSD-like) (The BSD License) jline (org.scala-lang:jline:2.10.4 - http://www.scala-lang.org/)
+     (BSD 3 Clause) Scala (http://www.scala-lang.org/download/#License)
+        (Interpreter classes (all .scala files in repl/src/main/scala
+        except for Main.Scala, SparkHelper.scala and ExecutorClassLoader.scala),
+        and for SerializableMapWrapper in JavaUtils.scala)
      (BSD-like) Scala Actors library (org.scala-lang:scala-actors:2.10.4 - http://www.scala-lang.org/)
      (BSD-like) Scala Compiler (org.scala-lang:scala-compiler:2.10.4 - http://www.scala-lang.org/)
      (BSD-like) Scala Compiler (org.scala-lang:scala-reflect:2.10.4 - http://www.scala-lang.org/)
@@ -934,13 +267,17 @@ The following components are provided under a BSD-style license. See project lin
      (The BSD License) xmlenc Library (xmlenc:xmlenc:0.52 - http://xmlenc.sourceforge.net)
      (The New BSD License) Py4J (net.sf.py4j:py4j:0.8.2.1 - http://py4j.sourceforge.net/)
      (Two-clause BSD-style license) JUnit-Interface (com.novocode:junit-interface:0.10 - http://github.com/szeiger/junit-interface/)
-     (ISC/BSD License) jbcrypt (org.mindrot:jbcrypt:0.3m - http://www.mindrot.org/)
+     (BSD licence) sbt and sbt-launch-lib.bash
+     (BSD 3 Clause) d3.min.js (https://github.com/mbostock/d3/blob/master/LICENSE)
+     (BSD 3 Clause) DPark (https://github.com/douban/dpark/blob/master/LICENSE)
+     (BSD 3 Clause) CloudPickle (https://github.com/cloudpipe/cloudpickle/blob/master/LICENSE)
 
 ========================================================================
 MIT licenses
 ========================================================================
 
 The following components are provided under the MIT License. See project link for details.
+The text of each license is also included at licenses/LICENSE-[project].txt.
 
      (MIT License) JCL 1.1.1 implemented over SLF4J (org.slf4j:jcl-over-slf4j:1.7.5 - http://www.slf4j.org)
      (MIT License) JUL to SLF4J bridge (org.slf4j:jul-to-slf4j:1.7.5 - http://www.slf4j.org)
@@ -951,3 +288,7 @@ The following components are provided under the MIT License. See project link fo
      (The MIT License) Mockito (org.mockito:mockito-core:1.9.5 - http://www.mockito.org)
      (MIT License) jquery (https://jquery.org/license/)
      (MIT License) AnchorJS (https://github.com/bryanbraun/anchorjs)
+     (MIT License) graphlib-dot (https://github.com/cpettitt/graphlib-dot)
+     (MIT License) dagre-d3 (https://github.com/cpettitt/dagre-d3)
+     (MIT License) sorttable (https://github.com/stuartlangridge/sorttable)
+     (MIT License) boto (https://github.com/boto/boto/blob/develop/LICENSE)
diff --git a/NOTICE b/NOTICE
index 452aef287165..7f7769f73047 100644
--- a/NOTICE
+++ b/NOTICE
@@ -572,3 +572,38 @@ Copyright 2009-2013 The Apache Software Foundation
 
 Apache Avro IPC
 Copyright 2009-2013 The Apache Software Foundation
+
+
+Vis.js
+Copyright 2010-2015 Almende B.V.
+
+Vis.js is dual licensed under both
+
+  * The Apache 2.0 License
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    and
+
+  * The MIT License
+    http://opensource.org/licenses/MIT
+
+Vis.js may be distributed under either license.
+
+
+Vis.js uses and redistributes the following third-party libraries:
+
+- component-emitter
+  https://github.com/component/emitter
+  The MIT License
+
+- hammer.js
+  http://hammerjs.github.io/
+  The MIT License
+
+- moment.js
+  http://momentjs.com/
+  The MIT License
+
+- keycharm
+  https://github.com/AlexDM0/keycharm
+  The MIT License
\ No newline at end of file
diff --git a/core/src/main/java/org/apache/spark/util/collection/TimSort.java b/core/src/main/java/org/apache/spark/util/collection/TimSort.java
index a90cc0e761f6..40b5fb7fe4b4 100644
--- a/core/src/main/java/org/apache/spark/util/collection/TimSort.java
+++ b/core/src/main/java/org/apache/spark/util/collection/TimSort.java
@@ -15,6 +15,24 @@
  * limitations under the License.
  */
 
+/*
+ * Based on TimSort.java from the Android Open Source Project
+ *
+ *  Copyright (C) 2008 The Android Open Source Project
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package org.apache.spark.util.collection;
 
 import java.util.Comparator;
diff --git a/licenses/LICENSE-AnchorJS.txt b/licenses/LICENSE-AnchorJS.txt
new file mode 100644
index 000000000000..2bf24b9b9f84
--- /dev/null
+++ b/licenses/LICENSE-AnchorJS.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-DPark.txt b/licenses/LICENSE-DPark.txt
new file mode 100644
index 000000000000..1d916090e4ea
--- /dev/null
+++ b/licenses/LICENSE-DPark.txt
@@ -0,0 +1,30 @@
+Copyright (c) 2011, Douban Inc. <http://www.douban.com/>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+
+    * Neither the name of the Douban Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-Mockito.txt b/licenses/LICENSE-Mockito.txt
new file mode 100644
index 000000000000..e0840a446caf
--- /dev/null
+++ b/licenses/LICENSE-Mockito.txt
@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2007 Mockito contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-SnapTree.txt b/licenses/LICENSE-SnapTree.txt
new file mode 100644
index 000000000000..a538825d89ec
--- /dev/null
+++ b/licenses/LICENSE-SnapTree.txt
@@ -0,0 +1,35 @@
+SNAPTREE LICENSE
+
+Copyright (c) 2009-2012 Stanford University, unless otherwise specified.
+All rights reserved.
+
+This software was developed by the Pervasive Parallelism Laboratory of
+Stanford University, California, USA.
+
+Permission to use, copy, modify, and distribute this software in source
+or binary form for any purpose with or without fee is hereby granted,
+provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of Stanford University nor the names of its
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
diff --git a/licenses/LICENSE-antlr.txt b/licenses/LICENSE-antlr.txt
new file mode 100644
index 000000000000..3021ea04332e
--- /dev/null
+++ b/licenses/LICENSE-antlr.txt
@@ -0,0 +1,8 @@
+[The BSD License]
+Copyright (c) 2012 Terence Parr and Sam Harwell
+All rights reserved.
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-boto.txt b/licenses/LICENSE-boto.txt
new file mode 100644
index 000000000000..7bba0cd9e10a
--- /dev/null
+++ b/licenses/LICENSE-boto.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2006-2008 Mitch Garnaat http://garnaat.org/
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish, dis-
+tribute, sublicense, and/or sell copies of the Software, and to permit
+persons to whom the Software is furnished to do so, subject to the fol-
+lowing conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-cloudpickle.txt b/licenses/LICENSE-cloudpickle.txt
new file mode 100644
index 000000000000..b1e20fa1eda8
--- /dev/null
+++ b/licenses/LICENSE-cloudpickle.txt
@@ -0,0 +1,28 @@
+Copyright (c) 2012, Regents of the University of California.
+Copyright (c) 2009 `PiCloud, Inc. <http://www.picloud.com>`_.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the University of California, Berkeley nor the
+      names of its contributors may be used to endorse or promote
+      products derived from this software without specific prior written
+      permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-d3.min.js.txt b/licenses/LICENSE-d3.min.js.txt
new file mode 100644
index 000000000000..c71e3f254c06
--- /dev/null
+++ b/licenses/LICENSE-d3.min.js.txt
@@ -0,0 +1,26 @@
+Copyright (c) 2010-2015, Michael Bostock
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* The name Michael Bostock may not be used to endorse or promote products
+  derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL MICHAEL BOSTOCK BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-dagre-d3.txt b/licenses/LICENSE-dagre-d3.txt
new file mode 100644
index 000000000000..4864fe05e980
--- /dev/null
+++ b/licenses/LICENSE-dagre-d3.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2013 Chris Pettitt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-f2j.txt b/licenses/LICENSE-f2j.txt
new file mode 100644
index 000000000000..e28fd3ccdfa6
--- /dev/null
+++ b/licenses/LICENSE-f2j.txt
@@ -0,0 +1,8 @@
+Copyright © 2015 The University of Tennessee. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+· Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+· Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer listed in this license in the documentation and/or other materials provided with the distribution.
+· Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as is" and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. in no event shall the copyright owner or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.
\ No newline at end of file
diff --git a/licenses/LICENSE-graphlib-dot.txt b/licenses/LICENSE-graphlib-dot.txt
new file mode 100644
index 000000000000..c9e18cd56242
--- /dev/null
+++ b/licenses/LICENSE-graphlib-dot.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2012-2013 Chris Pettitt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-heapq.txt b/licenses/LICENSE-heapq.txt
new file mode 100644
index 000000000000..0c4c4b954bea
--- /dev/null
+++ b/licenses/LICENSE-heapq.txt
@@ -0,0 +1,280 @@
+
+# A. HISTORY OF THE SOFTWARE
+# ==========================
+#
+# Python was created in the early 1990s by Guido van Rossum at Stichting
+# Mathematisch Centrum (CWI, see http://www.cwi.nl) in the Netherlands
+# as a successor of a language called ABC.  Guido remains Python's
+# principal author, although it includes many contributions from others.
+#
+# In 1995, Guido continued his work on Python at the Corporation for
+#     National Research Initiatives (CNRI, see http://www.cnri.reston.va.us)
+# in Reston, Virginia where he released several versions of the
+# software.
+#
+# In May 2000, Guido and the Python core development team moved to
+# BeOpen.com to form the BeOpen PythonLabs team.  In October of the same
+# year, the PythonLabs team moved to Digital Creations (now Zope
+# Corporation, see http://www.zope.com).  In 2001, the Python Software
+# Foundation (PSF, see http://www.python.org/psf/) was formed, a
+# non-profit organization created specifically to own Python-related
+# Intellectual Property.  Zope Corporation is a sponsoring member of
+# the PSF.
+#
+# All Python releases are Open Source (see http://www.opensource.org for
+# the Open Source Definition).  Historically, most, but not all, Python
+# releases have also been GPL-compatible; the table below summarizes
+# the various releases.
+#
+# Release         Derived     Year        Owner       GPL-
+# from                                compatible? (1)
+#
+# 0.9.0 thru 1.2              1991-1995   CWI         yes
+# 1.3 thru 1.5.2  1.2         1995-1999   CNRI        yes
+# 1.6             1.5.2       2000        CNRI        no
+# 2.0             1.6         2000        BeOpen.com  no
+# 1.6.1           1.6         2001        CNRI        yes (2)
+# 2.1             2.0+1.6.1   2001        PSF         no
+# 2.0.1           2.0+1.6.1   2001        PSF         yes
+# 2.1.1           2.1+2.0.1   2001        PSF         yes
+# 2.2             2.1.1       2001        PSF         yes
+# 2.1.2           2.1.1       2002        PSF         yes
+# 2.1.3           2.1.2       2002        PSF         yes
+# 2.2.1           2.2         2002        PSF         yes
+# 2.2.2           2.2.1       2002        PSF         yes
+# 2.2.3           2.2.2       2003        PSF         yes
+# 2.3             2.2.2       2002-2003   PSF         yes
+# 2.3.1           2.3         2002-2003   PSF         yes
+# 2.3.2           2.3.1       2002-2003   PSF         yes
+# 2.3.3           2.3.2       2002-2003   PSF         yes
+# 2.3.4           2.3.3       2004        PSF         yes
+# 2.3.5           2.3.4       2005        PSF         yes
+# 2.4             2.3         2004        PSF         yes
+# 2.4.1           2.4         2005        PSF         yes
+# 2.4.2           2.4.1       2005        PSF         yes
+# 2.4.3           2.4.2       2006        PSF         yes
+# 2.4.4           2.4.3       2006        PSF         yes
+# 2.5             2.4         2006        PSF         yes
+# 2.5.1           2.5         2007        PSF         yes
+# 2.5.2           2.5.1       2008        PSF         yes
+# 2.5.3           2.5.2       2008        PSF         yes
+# 2.6             2.5         2008        PSF         yes
+# 2.6.1           2.6         2008        PSF         yes
+# 2.6.2           2.6.1       2009        PSF         yes
+# 2.6.3           2.6.2       2009        PSF         yes
+# 2.6.4           2.6.3       2009        PSF         yes
+# 2.6.5           2.6.4       2010        PSF         yes
+# 2.7             2.6         2010        PSF         yes
+#
+# Footnotes:
+#
+# (1) GPL-compatible doesn't mean that we're distributing Python under
+# the GPL.  All Python licenses, unlike the GPL, let you distribute
+# a modified version without making your changes open source.  The
+# GPL-compatible licenses make it possible to combine Python with
+#     other software that is released under the GPL; the others don't.
+#
+# (2) According to Richard Stallman, 1.6.1 is not GPL-compatible,
+# because its license has a choice of law clause.  According to
+# CNRI, however, Stallman's lawyer has told CNRI's lawyer that 1.6.1
+# is "not incompatible" with the GPL.
+#
+# Thanks to the many outside volunteers who have worked under Guido's
+# direction to make these releases possible.
+#
+#
+# B. TERMS AND CONDITIONS FOR ACCESSING OR OTHERWISE USING PYTHON
+# ===============================================================
+#
+# PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
+# --------------------------------------------
+#
+# 1. This LICENSE AGREEMENT is between the Python Software Foundation
+# ("PSF"), and the Individual or Organization ("Licensee") accessing and
+# otherwise using this software ("Python") in source or binary form and
+# its associated documentation.
+#
+# 2. Subject to the terms and conditions of this License Agreement, PSF hereby
+# grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
+# analyze, test, perform and/or display publicly, prepare derivative works,
+# distribute, and otherwise use Python alone or in any derivative version,
+# provided, however, that PSF's License Agreement and PSF's notice of copyright,
+# i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
+# 2011, 2012, 2013 Python Software Foundation; All Rights Reserved" are retained
+# in Python alone or in any derivative version prepared by Licensee.
+#
+# 3. In the event Licensee prepares a derivative work that is based on
+# or incorporates Python or any part thereof, and wants to make
+# the derivative work available to others as provided herein, then
+# Licensee hereby agrees to include in any such work a brief summary of
+# the changes made to Python.
+#
+# 4. PSF is making Python available to Licensee on an "AS IS"
+# basis.  PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+# IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
+# DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+# FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
+# INFRINGE ANY THIRD PARTY RIGHTS.
+#
+# 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
+# FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
+# A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
+# OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+#
+# 6. This License Agreement will automatically terminate upon a material
+# breach of its terms and conditions.
+#
+# 7. Nothing in this License Agreement shall be deemed to create any
+# relationship of agency, partnership, or joint venture between PSF and
+# Licensee.  This License Agreement does not grant permission to use PSF
+# trademarks or trade name in a trademark sense to endorse or promote
+# products or services of Licensee, or any third party.
+#
+# 8. By copying, installing or otherwise using Python, Licensee
+# agrees to be bound by the terms and conditions of this License
+# Agreement.
+#
+#
+# BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0
+# -------------------------------------------
+#
+# BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1
+#
+# 1. This LICENSE AGREEMENT is between BeOpen.com ("BeOpen"), having an
+# office at 160 Saratoga Avenue, Santa Clara, CA 95051, and the
+# Individual or Organization ("Licensee") accessing and otherwise using
+# this software in source or binary form and its associated
+# documentation ("the Software").
+#
+# 2. Subject to the terms and conditions of this BeOpen Python License
+# Agreement, BeOpen hereby grants Licensee a non-exclusive,
+# royalty-free, world-wide license to reproduce, analyze, test, perform
+# and/or display publicly, prepare derivative works, distribute, and
+# otherwise use the Software alone or in any derivative version,
+# provided, however, that the BeOpen Python License is retained in the
+# Software, alone or in any derivative version prepared by Licensee.
+#
+# 3. BeOpen is making the Software available to Licensee on an "AS IS"
+# basis.  BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+# IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND
+# DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+# FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE WILL NOT
+# INFRINGE ANY THIRD PARTY RIGHTS.
+#
+# 4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE
+# SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS
+# AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY
+# DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+#
+# 5. This License Agreement will automatically terminate upon a material
+# breach of its terms and conditions.
+#
+# 6. This License Agreement shall be governed by and interpreted in all
+# respects by the law of the State of California, excluding conflict of
+# law provisions.  Nothing in this License Agreement shall be deemed to
+# create any relationship of agency, partnership, or joint venture
+# between BeOpen and Licensee.  This License Agreement does not grant
+# permission to use BeOpen trademarks or trade names in a trademark
+# sense to endorse or promote products or services of Licensee, or any
+# third party.  As an exception, the "BeOpen Python" logos available at
+# http://www.pythonlabs.com/logos.html may be used according to the
+# permissions granted on that web page.
+#
+# 7. By copying, installing or otherwise using the software, Licensee
+# agrees to be bound by the terms and conditions of this License
+# Agreement.
+#
+#
+# CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1
+# ---------------------------------------
+#
+# 1. This LICENSE AGREEMENT is between the Corporation for National
+#     Research Initiatives, having an office at 1895 Preston White Drive,
+# Reston, VA 20191 ("CNRI"), and the Individual or Organization
+# ("Licensee") accessing and otherwise using Python 1.6.1 software in
+# source or binary form and its associated documentation.
+#
+# 2. Subject to the terms and conditions of this License Agreement, CNRI
+# hereby grants Licensee a nonexclusive, royalty-free, world-wide
+# license to reproduce, analyze, test, perform and/or display publicly,
+# prepare derivative works, distribute, and otherwise use Python 1.6.1
+# alone or in any derivative version, provided, however, that CNRI's
+# License Agreement and CNRI's notice of copyright, i.e., "Copyright (c)
+# 1995-2001 Corporation for National Research Initiatives; All Rights
+# Reserved" are retained in Python 1.6.1 alone or in any derivative
+# version prepared by Licensee.  Alternately, in lieu of CNRI's License
+# Agreement, Licensee may substitute the following text (omitting the
+# quotes): "Python 1.6.1 is made available subject to the terms and
+# conditions in CNRI's License Agreement.  This Agreement together with
+# Python 1.6.1 may be located on the Internet using the following
+# unique, persistent identifier (known as a handle): 1895.22/1013.  This
+# Agreement may also be obtained from a proxy server on the Internet
+# using the following URL: http://hdl.handle.net/1895.22/1013".
+#
+# 3. In the event Licensee prepares a derivative work that is based on
+# or incorporates Python 1.6.1 or any part thereof, and wants to make
+# the derivative work available to others as provided herein, then
+# Licensee hereby agrees to include in any such work a brief summary of
+# the changes made to Python 1.6.1.
+#
+# 4. CNRI is making Python 1.6.1 available to Licensee on an "AS IS"
+# basis.  CNRI MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
+# IMPLIED.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, CNRI MAKES NO AND
+# DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
+# FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON 1.6.1 WILL NOT
+# INFRINGE ANY THIRD PARTY RIGHTS.
+#
+# 5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
+# 1.6.1 FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
+# A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1,
+# OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
+#
+# 6. This License Agreement will automatically terminate upon a material
+# breach of its terms and conditions.
+#
+# 7. This License Agreement shall be governed by the federal
+# intellectual property law of the United States, including without
+# limitation the federal copyright law, and, to the extent such
+# U.S. federal law does not apply, by the law of the Commonwealth of
+# Virginia, excluding Virginia's conflict of law provisions.
+# Notwithstanding the foregoing, with regard to derivative works based
+# on Python 1.6.1 that incorporate non-separable material that was
+# previously distributed under the GNU General Public License (GPL), the
+# law of the Commonwealth of Virginia shall govern this License
+# Agreement only as to issues arising under or with respect to
+# Paragraphs 4, 5, and 7 of this License Agreement.  Nothing in this
+# License Agreement shall be deemed to create any relationship of
+# agency, partnership, or joint venture between CNRI and Licensee.  This
+# License Agreement does not grant permission to use CNRI trademarks or
+# trade name in a trademark sense to endorse or promote products or
+# services of Licensee, or any third party.
+#
+# 8. By clicking on the "ACCEPT" button where indicated, or by copying,
+# installing or otherwise using Python 1.6.1, Licensee agrees to be
+# bound by the terms and conditions of this License Agreement.
+#
+# ACCEPT
+#
+#
+# CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2
+# --------------------------------------------------
+#
+# Copyright (c) 1991 - 1995, Stichting Mathematisch Centrum Amsterdam,
+# The Netherlands.  All rights reserved.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose and without fee is hereby granted,
+# provided that the above copyright notice appear in all copies and that
+# both that copyright notice and this permission notice appear in
+# supporting documentation, and that the name of Stichting Mathematisch
+# Centrum or CWI not be used in advertising or publicity pertaining to
+# distribution of the software without specific, written prior
+# permission.
+#
+# STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+# FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+# FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-javolution.txt b/licenses/LICENSE-javolution.txt
new file mode 100644
index 000000000000..b64af4d8298a
--- /dev/null
+++ b/licenses/LICENSE-javolution.txt
@@ -0,0 +1,27 @@
+/*
+ * Javolution - Java(tm) Solution for Real-Time and Embedded Systems
+ * Copyright (c) 2012, Javolution (http://javolution.org/)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
\ No newline at end of file
diff --git a/licenses/LICENSE-jbcrypt.txt b/licenses/LICENSE-jbcrypt.txt
new file mode 100644
index 000000000000..d332534c0635
--- /dev/null
+++ b/licenses/LICENSE-jbcrypt.txt
@@ -0,0 +1,17 @@
+jBCrypt is subject to the following license:
+
+/*
+ * Copyright (c) 2006 Damien Miller <djm@mindrot.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
diff --git a/licenses/LICENSE-jblas.txt b/licenses/LICENSE-jblas.txt
new file mode 100644
index 000000000000..5629dafb65b3
--- /dev/null
+++ b/licenses/LICENSE-jblas.txt
@@ -0,0 +1,31 @@
+Copyright (c) 2009, Mikio L. Braun and contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of the Technische Universität Berlin nor the
+      names of its contributors may be used to endorse or promote
+      products derived from this software without specific prior
+      written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-jline.txt b/licenses/LICENSE-jline.txt
new file mode 100644
index 000000000000..2ec539d10ac5
--- /dev/null
+++ b/licenses/LICENSE-jline.txt
@@ -0,0 +1,32 @@
+Copyright (c) 2002-2006, Marc Prud'hommeaux <mwp1@cornell.edu>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or
+without modification, are permitted provided that the following
+conditions are met:
+
+Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with
+the distribution.
+
+Neither the name of JLine nor the names of its contributors
+may be used to endorse or promote products derived from this
+software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
+OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-jpmml-model.txt b/licenses/LICENSE-jpmml-model.txt
new file mode 100644
index 000000000000..69411d1c6e9a
--- /dev/null
+++ b/licenses/LICENSE-jpmml-model.txt
@@ -0,0 +1,10 @@
+Copyright (c) 2009, University of Tartu
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-jquery.txt b/licenses/LICENSE-jquery.txt
new file mode 100644
index 000000000000..e1dd696d3b6c
--- /dev/null
+++ b/licenses/LICENSE-jquery.txt
@@ -0,0 +1,9 @@
+The MIT License (MIT)
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-junit-interface.txt b/licenses/LICENSE-junit-interface.txt
new file mode 100644
index 000000000000..e835350c4e2a
--- /dev/null
+++ b/licenses/LICENSE-junit-interface.txt
@@ -0,0 +1,24 @@
+Copyright (c) 2009-2012, Stefan Zeiger
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-kryo.txt b/licenses/LICENSE-kryo.txt
new file mode 100644
index 000000000000..3f6a160c238e
--- /dev/null
+++ b/licenses/LICENSE-kryo.txt
@@ -0,0 +1,10 @@
+Copyright (c) 2008, Nathan Sweet
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    * Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-minlog.txt b/licenses/LICENSE-minlog.txt
new file mode 100644
index 000000000000..3f6a160c238e
--- /dev/null
+++ b/licenses/LICENSE-minlog.txt
@@ -0,0 +1,10 @@
+Copyright (c) 2008, Nathan Sweet
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    * Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-netlib.txt b/licenses/LICENSE-netlib.txt
new file mode 100644
index 000000000000..75783ed6bc35
--- /dev/null
+++ b/licenses/LICENSE-netlib.txt
@@ -0,0 +1,49 @@
+Copyright (c) 2013 Samuel Halliday
+Copyright (c) 1992-2011 The University of Tennessee and The University
+                        of Tennessee Research Foundation.  All rights
+                        reserved.
+Copyright (c) 2000-2011 The University of California Berkeley. All
+                        rights reserved.
+Copyright (c) 2006-2011 The University of Colorado Denver.  All rights
+                        reserved.
+
+$COPYRIGHT$
+
+Additional copyrights may follow
+
+$HEADER$
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+- Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer listed
+  in this license in the documentation and/or other materials
+  provided with the distribution.
+
+- Neither the name of the copyright holders nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+The copyright holders provide no reassurances that the source code
+provided does not infringe any patent, copyright, or any other
+intellectual property rights of third parties.  The copyright holders
+disclaim any liability to any recipient for claims brought against
+recipient by any third party for infringement of that parties
+intellectual property rights.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-paranamer.txt b/licenses/LICENSE-paranamer.txt
new file mode 100644
index 000000000000..fca18473ba03
--- /dev/null
+++ b/licenses/LICENSE-paranamer.txt
@@ -0,0 +1,28 @@
+[ ParaNamer used to be 'Pubic Domain', but since it includes a small piece of ASM it is now the same license as that: BSD ]
+
+ Copyright (c) 2006 Paul Hammant & ThoughtWorks Inc
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+ 3. Neither the name of the copyright holders nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-protobuf.txt b/licenses/LICENSE-protobuf.txt
new file mode 100644
index 000000000000..b4350ec83c75
--- /dev/null
+++ b/licenses/LICENSE-protobuf.txt
@@ -0,0 +1,42 @@
+This license applies to all parts of Protocol Buffers except the following:
+
+  - Atomicops support for generic gcc, located in
+    src/google/protobuf/stubs/atomicops_internals_generic_gcc.h.
+    This file is copyrighted by Red Hat Inc.
+
+  - Atomicops support for AIX/POWER, located in
+    src/google/protobuf/stubs/atomicops_internals_aix.h.
+    This file is copyrighted by Bloomberg Finance LP.
+
+Copyright 2014, Google Inc.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+    * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Code generated by the Protocol Buffer compiler is owned by the owner
+of the input file used when generating it.  This code is not
+standalone and requires a support library to be linked with it.  This
+support library is itself covered by the above license.
\ No newline at end of file
diff --git a/licenses/LICENSE-py4j.txt b/licenses/LICENSE-py4j.txt
new file mode 100644
index 000000000000..70af3e69ed67
--- /dev/null
+++ b/licenses/LICENSE-py4j.txt
@@ -0,0 +1,27 @@
+Copyright (c) 2009-2011, Barthelemy Dagenais All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+- The name of the author may not be used to endorse or promote products
+derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
diff --git a/licenses/LICENSE-pyrolite.txt b/licenses/LICENSE-pyrolite.txt
new file mode 100644
index 000000000000..9457c7aa6614
--- /dev/null
+++ b/licenses/LICENSE-pyrolite.txt
@@ -0,0 +1,28 @@
+
+Pyro - Python Remote Objects
+Software License, copyright, and disclaimer
+
+  Pyro is Copyright (c) by Irmen de Jong (irmen@razorvine.net).
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+
+
+This is the "MIT Software License" which is OSI-certified, and GPL-compatible.
+See http://www.opensource.org/licenses/mit-license.php
+
diff --git a/licenses/LICENSE-reflectasm.txt b/licenses/LICENSE-reflectasm.txt
new file mode 100644
index 000000000000..3f6a160c238e
--- /dev/null
+++ b/licenses/LICENSE-reflectasm.txt
@@ -0,0 +1,10 @@
+Copyright (c) 2008, Nathan Sweet
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+    * Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-sbt-launch-lib.txt b/licenses/LICENSE-sbt-launch-lib.txt
new file mode 100644
index 000000000000..3b9156baaab7
--- /dev/null
+++ b/licenses/LICENSE-sbt-launch-lib.txt
@@ -0,0 +1,26 @@
+// Generated from http://www.opensource.org/licenses/bsd-license.php
+Copyright (c) 2011, Paul Phillips.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name of the author nor the names of its contributors may be
+      used to endorse or promote products derived from this software without
+      specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-scala.txt b/licenses/LICENSE-scala.txt
new file mode 100644
index 000000000000..4846076aba24
--- /dev/null
+++ b/licenses/LICENSE-scala.txt
@@ -0,0 +1,30 @@
+Copyright (c) 2002-2013 EPFL
+Copyright (c) 2011-2013 Typesafe, Inc.
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+- Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+- Neither the name of the EPFL nor the names of its contributors may be
+  used to endorse or promote products derived from this software without
+  specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
diff --git a/licenses/LICENSE-scalacheck.txt b/licenses/LICENSE-scalacheck.txt
new file mode 100644
index 000000000000..cb8f97842f4c
--- /dev/null
+++ b/licenses/LICENSE-scalacheck.txt
@@ -0,0 +1,32 @@
+ScalaCheck LICENSE
+
+Copyright (c) 2007-2015, Rickard Nilsson
+All rights reserved.
+
+Permission to use, copy, modify, and distribute this software in source
+or binary form for any purpose with or without fee is hereby granted,
+provided that the following conditions are met:
+
+   1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+   3. Neither the name of the author nor the names of its contributors
+      may be used to endorse or promote products derived from this
+      software without specific prior written permission.
+
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
\ No newline at end of file
diff --git a/licenses/LICENSE-scopt.txt b/licenses/LICENSE-scopt.txt
new file mode 100644
index 000000000000..2bf24b9b9f84
--- /dev/null
+++ b/licenses/LICENSE-scopt.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) <year> <copyright holders>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-slf4j.txt b/licenses/LICENSE-slf4j.txt
new file mode 100644
index 000000000000..6548cd3af432
--- /dev/null
+++ b/licenses/LICENSE-slf4j.txt
@@ -0,0 +1,21 @@
+Copyright (c) 2004-2013 QOS.ch
+ All rights reserved.
+
+ Permission is hereby granted, free  of charge, to any person obtaining
+ a  copy  of this  software  and  associated  documentation files  (the
+ "Software"), to  deal in  the Software without  restriction, including
+ without limitation  the rights to  use, copy, modify,  merge, publish,
+ distribute,  sublicense, and/or sell  copies of  the Software,  and to
+ permit persons to whom the Software  is furnished to do so, subject to
+ the following conditions:
+
+ The  above  copyright  notice  and  this permission  notice  shall  be
+ included in all copies or substantial portions of the Software.
+
+ THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
+ EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
+ MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-sorttable.js.txt b/licenses/LICENSE-sorttable.js.txt
new file mode 100644
index 000000000000..b31a5b206bf4
--- /dev/null
+++ b/licenses/LICENSE-sorttable.js.txt
@@ -0,0 +1,16 @@
+Copyright (c) 1997-2007 Stuart Langridge
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/licenses/LICENSE-spire.txt b/licenses/LICENSE-spire.txt
new file mode 100644
index 000000000000..40af7746b931
--- /dev/null
+++ b/licenses/LICENSE-spire.txt
@@ -0,0 +1,19 @@
+Copyright (c) 2011-2012 Erik Osheim, Tom Switzer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/licenses/LICENSE-xmlenc.txt b/licenses/LICENSE-xmlenc.txt
new file mode 100644
index 000000000000..3a70c9bfcdad
--- /dev/null
+++ b/licenses/LICENSE-xmlenc.txt
@@ -0,0 +1,27 @@
+Copyright 2003-2005, Ernst de Haan <wfe.dehaan@gmail.com>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/make-distribution.sh b/make-distribution.sh
index 04ad0052eb24..62c0ba6df7d3 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -198,6 +198,7 @@ fi
 
 # Copy license and ASF files
 cp "$SPARK_HOME/LICENSE" "$DISTDIR"
+cp -r "$SPARK_HOME/licenses" "$DISTDIR"
 cp "$SPARK_HOME/NOTICE" "$DISTDIR"
 
 if [ -e "$SPARK_HOME"/CHANGES.txt ]; then
diff --git a/network/common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java b/network/common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java
index 57113ed12d41..922c37a10efd 100644
--- a/network/common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java
+++ b/network/common/src/main/java/org/apache/spark/network/util/LimitedInputStream.java
@@ -15,6 +15,24 @@
  * limitations under the License.
  */
 
+/*
+ * Based on LimitedInputStream.java from Google Guava
+ *
+ * Copyright (C) 2007 The Guava Authors
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
 package org.apache.spark.network.util;
 
 import java.io.FilterInputStream;

From 9b9fe5f7bf55257269d8febcd64e95677075dfb6 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Mon, 28 Sep 2015 22:40:02 -0700
Subject: [PATCH 112/896] [SPARK-10670] [ML] [Doc] add api reference for ml doc

jira: https://issues.apache.org/jira/browse/SPARK-10670
In the Markdown docs for the spark.ml Programming Guide, we have code examples with codetabs for each language. We should link to each language's API docs within the corresponding codetab, but we are inconsistent about this. For an example of what we want to do, see the "Word2Vec" section in https://github.com/apache/spark/blob/64743870f23bffb8d96dcc8a0181c1452782a151/docs/ml-features.md
This JIRA is just for spark.ml, not spark.mllib

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #8901 from hhbyyh/docAPI.
---
 docs/ml-features.md | 259 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 195 insertions(+), 64 deletions(-)

diff --git a/docs/ml-features.md b/docs/ml-features.md
index b70da4ac6384..44a98829393e 100644
--- a/docs/ml-features.md
+++ b/docs/ml-features.md
@@ -28,12 +28,15 @@ The algorithm combines Term Frequency (TF) counts with the [hashing trick](http:
 **IDF**: `IDF` is an `Estimator` which fits on a dataset and produces an `IDFModel`.  The `IDFModel` takes feature vectors (generally created from `HashingTF`) and scales each column.  Intuitively, it down-weights columns which appear frequently in a corpus.
 
 Please refer to the [MLlib user guide on TF-IDF](mllib-feature-extraction.html#tf-idf) for more details on Term Frequency and Inverse Document Frequency.
-For API details, refer to the [HashingTF API docs](api/scala/index.html#org.apache.spark.ml.feature.HashingTF) and the [IDF API docs](api/scala/index.html#org.apache.spark.ml.feature.IDF).
 
 In the following code segment, we start with a set of sentences.  We split each sentence into words using `Tokenizer`.  For each sentence (bag of words), we use `HashingTF` to hash the sentence into a feature vector.  We use `IDF` to rescale the feature vectors; this generally improves performance when using text as features.  Our feature vectors could then be passed to a learning algorithm.
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [HashingTF Scala docs](api/scala/index.html#org.apache.spark.ml.feature.HashingTF) and
+the [IDF Scala docs](api/scala/index.html#org.apache.spark.ml.feature.IDF) for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.{HashingTF, IDF, Tokenizer}
 
@@ -54,6 +57,10 @@ rescaledData.select("features", "label").take(3).foreach(println)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [HashingTF Java docs](api/java/org/apache/spark/ml/feature/HashingTF.html) and the
+[IDF Java docs](api/java/org/apache/spark/ml/feature/IDF.html) for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -100,6 +107,10 @@ for (Row r : rescaledData.select("features", "label").take(3)) {
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [HashingTF Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.HashingTF) and
+the [IDF Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.IDF) for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import HashingTF, IDF, Tokenizer
 
@@ -267,9 +278,11 @@ each vector represents the token counts of the document over the vocabulary.
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
-More details can be found in the API docs for
-[CountVectorizer](api/scala/index.html#org.apache.spark.ml.feature.CountVectorizer) and
-[CountVectorizerModel](api/scala/index.html#org.apache.spark.ml.feature.CountVectorizerModel).
+
+Refer to the [CountVectorizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.CountVectorizer)
+and the [CountVectorizerModel Scala docs](api/scala/index.html#org.apache.spark.ml.feature.CountVectorizerModel)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.CountVectorizer
 import org.apache.spark.mllib.util.CountVectorizerModel
@@ -297,9 +310,11 @@ cvModel.transform(df).select("features").show()
 </div>
 
 <div data-lang="java" markdown="1">
-More details can be found in the API docs for
-[CountVectorizer](api/java/org/apache/spark/ml/feature/CountVectorizer.html) and
-[CountVectorizerModel](api/java/org/apache/spark/ml/feature/CountVectorizerModel.html).
+
+Refer to the [CountVectorizer Java docs](api/java/org/apache/spark/ml/feature/CountVectorizer.html)
+and the [CountVectorizerModel Java docs](api/java/org/apache/spark/ml/feature/CountVectorizerModel.html)
+for more details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.ml.feature.CountVectorizer;
@@ -351,6 +366,11 @@ cvModel.transform(df).show();
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [Tokenizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Tokenizer)
+and the [RegexTokenizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Tokenizer)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.{Tokenizer, RegexTokenizer}
 
@@ -373,6 +393,11 @@ regexTokenized.select("words", "label").take(3).foreach(println)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [Tokenizer Java docs](api/java/org/apache/spark/ml/feature/Tokenizer.html)
+and the [RegexTokenizer Java docs](api/java/org/apache/spark/ml/feature/RegexTokenizer.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -414,6 +439,11 @@ RegexTokenizer regexTokenizer = new RegexTokenizer()
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [Tokenizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.Tokenizer) and
+the the [RegexTokenizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.RegexTokenizer)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import Tokenizer, RegexTokenizer
 
@@ -443,7 +473,8 @@ words from the input sequences. The list of stopwords is specified by
 the `stopWords` parameter.  We provide [a list of stop
 words](http://ir.dcs.gla.ac.uk/resources/linguistic_utils/stop_words) by
 default, accessible by calling `getStopWords` on a newly instantiated
-`StopWordsRemover` instance.
+`StopWordsRemover` instance. A boolean parameter `caseSensitive` indicates
+if the matches should be case sensitive (false by default).
 
 **Examples**
 
@@ -473,10 +504,8 @@ filtered out.
 
 <div data-lang="scala" markdown="1">
 
-[`StopWordsRemover`](api/scala/index.html#org.apache.spark.ml.feature.StopWordsRemover)
-takes an input column name, an output column name, a list of stop words,
-and a boolean indicating if the matches should be case sensitive (false
-by default).
+Refer to the [StopWordsRemover Scala docs](api/scala/index.html#org.apache.spark.ml.feature.StopWordsRemover)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.ml.feature.StopWordsRemover
@@ -495,10 +524,8 @@ remover.transform(dataSet).show()
 
 <div data-lang="java" markdown="1">
 
-[`StopWordsRemover`](api/java/org/apache/spark/ml/feature/StopWordsRemover.html)
-takes an input column name, an output column name, a list of stop words,
-and a boolean indicating if the matches should be case sensitive (false
-by default).
+Refer to the [StopWordsRemover Java docs](api/java/org/apache/spark/ml/feature/StopWordsRemover.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -531,10 +558,9 @@ remover.transform(dataset).show();
 </div>
 
 <div data-lang="python" markdown="1">
-[`StopWordsRemover`](api/python/pyspark.ml.html#pyspark.ml.feature.StopWordsRemover)
-takes an input column name, an output column name, a list of stop words,
-and a boolean indicating if the matches should be case sensitive (false
-by default).
+
+Refer to the [StopWordsRemover Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.StopWordsRemover)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.ml.feature import StopWordsRemover
@@ -560,7 +586,8 @@ An [n-gram](https://en.wikipedia.org/wiki/N-gram) is a sequence of $n$ tokens (t
 
 <div data-lang="scala" markdown="1">
 
-[`NGram`](api/scala/index.html#org.apache.spark.ml.feature.NGram) takes an input column name, an output column name, and an optional length parameter n (n=2 by default).
+Refer to the [NGram Scala docs](api/scala/index.html#org.apache.spark.ml.feature.NGram)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.ml.feature.NGram
@@ -579,7 +606,8 @@ ngramDataFrame.take(3).map(_.getAs[Stream[String]]("ngrams").toList).foreach(pri
 
 <div data-lang="java" markdown="1">
 
-[`NGram`](api/java/org/apache/spark/ml/feature/NGram.html) takes an input column name, an output column name, and an optional length parameter n (n=2 by default).
+Refer to the [NGram Java docs](api/java/org/apache/spark/ml/feature/NGram.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -617,7 +645,8 @@ for (Row r : ngramDataFrame.select("ngrams", "label").take(3)) {
 
 <div data-lang="python" markdown="1">
 
-[`NGram`](api/python/pyspark.ml.html#pyspark.ml.feature.NGram) takes an input column name, an output column name, and an optional length parameter n (n=2 by default).
+Refer to the [NGram Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.NGram)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.ml.feature import NGram
@@ -645,7 +674,8 @@ Binarization is the process of thresholding numerical features to binary (0/1) f
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
 
-Refer to the [Binarizer API doc](api/scala/index.html#org.apache.spark.ml.feature.Binarizer) for more details.
+Refer to the [Binarizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Binarizer)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.ml.feature.Binarizer
@@ -671,7 +701,8 @@ binarizedFeatures.collect().foreach(println)
 
 <div data-lang="java" markdown="1">
 
-Refer to the [Binarizer API doc](api/java/org/apache/spark/ml/feature/Binarizer.html) for more details.
+Refer to the [Binarizer Java docs](api/java/org/apache/spark/ml/feature/Binarizer.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -711,7 +742,8 @@ for (Row r : binarizedFeatures.collect()) {
 
 <div data-lang="python" markdown="1">
 
-Refer to the [Binarizer API doc](api/python/pyspark.ml.html#pyspark.ml.feature.Binarizer) for more details.
+Refer to the [Binarizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.Binarizer)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.ml.feature import Binarizer
@@ -736,7 +768,10 @@ for binarized_feature, in binarizedFeatures.collect():
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
-See the [Scala API documentation](api/scala/index.html#org.apache.spark.ml.feature.PCA) for API details.
+
+Refer to the [PCA Scala docs](api/scala/index.html#org.apache.spark.ml.feature.PCA)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.PCA
 import org.apache.spark.mllib.linalg.Vectors
@@ -759,7 +794,10 @@ result.show()
 </div>
 
 <div data-lang="java" markdown="1">
-See the [Java API documentation](api/java/org/apache/spark/ml/feature/PCA.html) for API details.
+
+Refer to the [PCA Java docs](api/java/org/apache/spark/ml/feature/PCA.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -799,7 +837,10 @@ result.show();
 </div>
 
 <div data-lang="python" markdown="1">
-See the [Python API documentation](api/python/pyspark.ml.html#pyspark.ml.feature.PCA) for API details.
+
+Refer to the [PCA Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.PCA)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import PCA
 from pyspark.mllib.linalg import Vectors
@@ -822,6 +863,10 @@ result.show(truncate=False)
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [PolynomialExpansion Scala docs](api/scala/index.html#org.apache.spark.ml.feature.PolynomialExpansion)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.PolynomialExpansion
 import org.apache.spark.mllib.linalg.Vectors
@@ -842,6 +887,10 @@ polyDF.select("polyFeatures").take(3).foreach(println)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [PolynomialExpansion Java docs](api/java/org/apache/spark/ml/feature/PolynomialExpansion.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -882,6 +931,10 @@ for (Row r : row) {
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [PolynomialExpansion Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.PolynomialExpansion)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import PolynomialExpansion
 from pyspark.mllib.linalg import Vectors
@@ -915,6 +968,10 @@ $0$th DCT coefficient and _not_ the $N/2$th).
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [DCT Scala docs](api/scala/index.html#org.apache.spark.ml.feature.DCT)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.DCT
 import org.apache.spark.mllib.linalg.Vectors
@@ -934,6 +991,10 @@ dctDf.select("featuresDCT").show(3)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [DCT Java docs](api/java/org/apache/spark/ml/feature/DCT.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -1018,8 +1079,8 @@ index `2`.
 
 <div data-lang="scala" markdown="1">
 
-[`StringIndexer`](api/scala/index.html#org.apache.spark.ml.feature.StringIndexer) takes an input
-column name and an output column name.
+Refer to the [StringIndexer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.StringIndexer)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.ml.feature.StringIndexer
@@ -1036,8 +1097,9 @@ indexed.show()
 </div>
 
 <div data-lang="java" markdown="1">
-[`StringIndexer`](api/java/org/apache/spark/ml/feature/StringIndexer.html) takes an input column
-name and an output column name.
+
+Refer to the [StringIndexer Java docs](api/java/org/apache/spark/ml/feature/StringIndexer.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -1074,8 +1136,8 @@ indexed.show();
 
 <div data-lang="python" markdown="1">
 
-[`StringIndexer`](api/python/pyspark.ml.html#pyspark.ml.feature.StringIndexer) takes an input
-column name and an output column name.
+Refer to the [StringIndexer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.StringIndexer)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.ml.feature import StringIndexer
@@ -1096,6 +1158,10 @@ indexed.show()
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [OneHotEncoder Scala docs](api/scala/index.html#org.apache.spark.ml.feature.OneHotEncoder)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.{OneHotEncoder, StringIndexer}
 
@@ -1122,6 +1188,10 @@ encoded.select("id", "categoryVec").foreach(println)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [OneHotEncoder Java docs](api/java/org/apache/spark/ml/feature/OneHotEncoder.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -1164,6 +1234,10 @@ DataFrame encoded = encoder.transform(indexed);
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [OneHotEncoder Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.OneHotEncoder)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import OneHotEncoder, StringIndexer
 
@@ -1197,12 +1271,14 @@ It can both automatically decide which features are categorical and convert orig
 
 Indexing categorical features allows algorithms such as Decision Trees and Tree Ensembles to treat categorical features appropriately, improving performance.
 
-Please refer to the [VectorIndexer API docs](api/scala/index.html#org.apache.spark.ml.feature.VectorIndexer) for more details.
-
 In the example below, we read in a dataset of labeled points and then use `VectorIndexer` to decide which features should be treated as categorical.  We transform the categorical feature values to their indices.  This transformed data could then be passed to algorithms such as `DecisionTreeRegressor` that handle categorical features.
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [VectorIndexer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.VectorIndexer)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.VectorIndexer
 
@@ -1223,6 +1299,10 @@ val indexedData = indexerModel.transform(data)
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [VectorIndexer Java docs](api/java/org/apache/spark/ml/feature/VectorIndexer.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Map;
 
@@ -1250,6 +1330,10 @@ DataFrame indexedData = indexerModel.transform(data);
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [VectorIndexer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.VectorIndexer)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import VectorIndexer
 
@@ -1273,6 +1357,10 @@ The following example demonstrates how to load a dataset in libsvm format and th
 
 <div class="codetabs">
 <div data-lang="scala">
+
+Refer to the [Normalizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Normalizer)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.Normalizer
 
@@ -1292,6 +1380,10 @@ val lInfNormData = normalizer.transform(dataFrame, normalizer.p -> Double.Positi
 </div>
 
 <div data-lang="java">
+
+Refer to the [Normalizer Java docs](api/java/org/apache/spark/ml/feature/Normalizer.html)
+for more details on the API.
+
 {% highlight java %}
 import org.apache.spark.ml.feature.Normalizer;
 import org.apache.spark.sql.DataFrame;
@@ -1313,6 +1405,10 @@ DataFrame lInfNormData =
 </div>
 
 <div data-lang="python">
+
+Refer to the [Normalizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.Normalizer)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import Normalizer
 
@@ -1341,14 +1437,14 @@ lInfNormData = normalizer.transform(dataFrame, {normalizer.p: float("inf")})
 
 Note that if the standard deviation of a feature is zero, it will return default `0.0` value in the `Vector` for that feature.
 
-More details can be found in the API docs for
-[StandardScaler](api/scala/index.html#org.apache.spark.ml.feature.StandardScaler) and
-[StandardScalerModel](api/scala/index.html#org.apache.spark.ml.feature.StandardScalerModel).
-
 The following example demonstrates how to load a dataset in libsvm format and then normalize each feature to have unit standard deviation.
 
 <div class="codetabs">
 <div data-lang="scala">
+
+Refer to the [StandardScaler Scala docs](api/scala/index.html#org.apache.spark.ml.feature.StandardScaler)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.StandardScaler
 
@@ -1369,6 +1465,10 @@ val scaledData = scalerModel.transform(dataFrame)
 </div>
 
 <div data-lang="java">
+
+Refer to the [StandardScaler Java docs](api/java/org/apache/spark/ml/feature/StandardScaler.html)
+for more details on the API.
+
 {% highlight java %}
 import org.apache.spark.ml.feature.StandardScaler;
 import org.apache.spark.ml.feature.StandardScalerModel;
@@ -1391,6 +1491,10 @@ DataFrame scaledData = scalerModel.transform(dataFrame);
 </div>
 
 <div data-lang="python">
+
+Refer to the [StandardScaler Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.StandardScaler)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import StandardScaler
 
@@ -1429,9 +1533,11 @@ The following example demonstrates how to load a dataset in libsvm format and th
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
-More details can be found in the API docs for
-[MinMaxScaler](api/scala/index.html#org.apache.spark.ml.feature.MinMaxScaler) and
-[MinMaxScalerModel](api/scala/index.html#org.apache.spark.ml.feature.MinMaxScalerModel).
+
+Refer to the [MinMaxScaler Scala docs](api/scala/index.html#org.apache.spark.ml.feature.MinMaxScaler)
+and the [MinMaxScalerModel Scala docs](api/scala/index.html#org.apache.spark.ml.feature.MinMaxScalerModel)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.MinMaxScaler
 
@@ -1450,9 +1556,11 @@ val scaledData = scalerModel.transform(dataFrame)
 </div>
 
 <div data-lang="java" markdown="1">
-More details can be found in the API docs for
-[MinMaxScaler](api/java/org/apache/spark/ml/feature/MinMaxScaler.html) and
-[MinMaxScalerModel](api/java/org/apache/spark/ml/feature/MinMaxScalerModel.html).
+
+Refer to the [MinMaxScaler Java docs](api/java/org/apache/spark/ml/feature/MinMaxScaler.html)
+and the [MinMaxScalerModel Java docs](api/java/org/apache/spark/ml/feature/MinMaxScalerModel.html)
+for more details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.ml.feature.MinMaxScaler;
@@ -1490,6 +1598,10 @@ The following example demonstrates how to bucketize a column of `Double`s into a
 
 <div class="codetabs">
 <div data-lang="scala">
+
+Refer to the [Bucketizer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Bucketizer)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.Bucketizer
 import org.apache.spark.sql.DataFrame
@@ -1510,6 +1622,10 @@ val bucketedData = bucketizer.transform(dataFrame)
 </div>
 
 <div data-lang="java">
+
+Refer to the [Bucketizer Java docs](api/java/org/apache/spark/ml/feature/Bucketizer.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -1545,6 +1661,10 @@ DataFrame bucketedData = bucketizer.transform(dataFrame);
 </div>
 
 <div data-lang="python">
+
+Refer to the [Bucketizer Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.Bucketizer)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import Bucketizer
 
@@ -1581,14 +1701,14 @@ v_N
   \end{pmatrix}
 \]`
 
-[`ElementwiseProduct`](api/scala/index.html#org.apache.spark.ml.feature.ElementwiseProduct) takes the following parameter:
-
-* `scalingVec`: the transforming vector.
-
 This example below demonstrates how to transform vectors using a transforming vector value.
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+
+Refer to the [ElementwiseProduct Scala docs](api/scala/index.html#org.apache.spark.ml.feature.ElementwiseProduct)
+for more details on the API.
+
 {% highlight scala %}
 import org.apache.spark.ml.feature.ElementwiseProduct
 import org.apache.spark.mllib.linalg.Vectors
@@ -1611,6 +1731,10 @@ transformer.transform(dataFrame).show()
 </div>
 
 <div data-lang="java" markdown="1">
+
+Refer to the [ElementwiseProduct Java docs](api/java/org/apache/spark/ml/feature/ElementwiseProduct.html)
+for more details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -1649,6 +1773,10 @@ transformer.transform(dataFrame).show();
 </div>
 
 <div data-lang="python" markdown="1">
+
+Refer to the [ElementwiseProduct Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.ElementwiseProduct)
+for more details on the API.
+
 {% highlight python %}
 from pyspark.ml.feature import ElementwiseProduct
 from pyspark.mllib.linalg import Vectors
@@ -1702,8 +1830,8 @@ output column to `features`, after transformation we should get the following Da
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
 
-[`VectorAssembler`](api/scala/index.html#org.apache.spark.ml.feature.VectorAssembler) takes an array
-of input column names and an output column name.
+Refer to the [VectorAssembler Scala docs](api/scala/index.html#org.apache.spark.ml.feature.VectorAssembler)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Vectors
@@ -1722,8 +1850,8 @@ println(output.select("features", "clicked").first())
 
 <div data-lang="java" markdown="1">
 
-[`VectorAssembler`](api/java/org/apache/spark/ml/feature/VectorAssembler.html) takes an array
-of input column names and an output column name.
+Refer to the [VectorAssembler Java docs](api/java/org/apache/spark/ml/feature/VectorAssembler.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -1759,8 +1887,8 @@ System.out.println(output.select("features", "clicked").first());
 
 <div data-lang="python" markdown="1">
 
-[`VectorAssembler`](api/python/pyspark.ml.html#pyspark.ml.feature.VectorAssembler) takes a list
-of input column names and an output column name.
+Refer to the [VectorAssembler Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.VectorAssembler)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.linalg import Vectors
@@ -1836,8 +1964,8 @@ Suppose also that we have a potential input attributes for the `userFeatures`, i
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
 
-[`VectorSlicer`](api/scala/index.html#org.apache.spark.ml.feature.VectorSlicer) takes an input
-column name with specified indices or names and an output column name.
+Refer to the [VectorSlicer Scala docs](api/scala/index.html#org.apache.spark.ml.feature.VectorSlicer)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Vectors
@@ -1870,8 +1998,8 @@ println(output.select("userFeatures", "features").first())
 
 <div data-lang="java" markdown="1">
 
-[`VectorSlicer`](api/java/org/apache/spark/ml/feature/VectorSlicer.html) takes an input column name
-with specified indices or names and an output column name.
+Refer to the [VectorSlicer Java docs](api/java/org/apache/spark/ml/feature/VectorSlicer.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -1941,7 +2069,8 @@ id | country | hour | clicked | features         | label
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
 
-[`RFormula`](api/scala/index.html#org.apache.spark.ml.feature.RFormula) takes an R formula string, and optional parameters for the names of its output columns.
+Refer to the [RFormula Scala docs](api/scala/index.html#org.apache.spark.ml.feature.RFormula)
+for more details on the API.
 
 {% highlight scala %}
 import org.apache.spark.ml.feature.RFormula
@@ -1962,7 +2091,8 @@ output.select("features", "label").show()
 
 <div data-lang="java" markdown="1">
 
-[`RFormula`](api/java/org/apache/spark/ml/feature/RFormula.html) takes an R formula string, and optional parameters for the names of its output columns.
+Refer to the [RFormula Java docs](api/java/org/apache/spark/ml/feature/RFormula.html)
+for more details on the API.
 
 {% highlight java %}
 import java.util.Arrays;
@@ -2000,7 +2130,8 @@ output.select("features", "label").show();
 
 <div data-lang="python" markdown="1">
 
-[`RFormula`](api/python/pyspark.ml.html#pyspark.ml.feature.RFormula) takes an R formula string, and optional parameters for the names of its output columns.
+Refer to the [RFormula Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.RFormula)
+for more details on the API.
 
 {% highlight python %}
 from pyspark.ml.feature import RFormula

From dba95ea03216e6b8e623db4a36e1018c6ed95538 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Tue, 29 Sep 2015 11:53:28 -0700
Subject: [PATCH 113/896] [SPARK-10825] [CORE] [TESTS] Fix race conditions in
 StandaloneDynamicAllocationSuite

Fix the following issues in StandaloneDynamicAllocationSuite:

1. It should not assume master and workers start in order
2. It should not assume master and workers get ready at once
3. It should not assume the application is already registered with master after creating SparkContext
4. It should not access Master.app and idToApp which are not thread safe

The changes includes:
* Use `eventually` to wait until master and workers are ready to fix 1 and 2
* Use `eventually`  to wait until the application is registered with master to fix 3
* Use `askWithRetry[MasterStateResponse](RequestMasterState)` to get the application info to fix 4

Author: zsxwing <zsxwing@gmail.com>

Closes #8914 from zsxwing/fix-StandaloneDynamicAllocationSuite.
---
 .../StandaloneDynamicAllocationSuite.scala    | 305 +++++++++++-------
 1 file changed, 192 insertions(+), 113 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
index 1f2a0f0d309c..2e2fa22eb477 100644
--- a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
@@ -17,10 +17,15 @@
 
 package org.apache.spark.deploy
 
+import scala.concurrent.duration._
+
 import org.mockito.Mockito.{mock, when}
 import org.scalatest.BeforeAndAfterAll
+import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark._
+import org.apache.spark.deploy.DeployMessages.{MasterStateResponse, RequestMasterState}
+import org.apache.spark.deploy.master.ApplicationInfo
 import org.apache.spark.deploy.master.Master
 import org.apache.spark.deploy.worker.Worker
 import org.apache.spark.rpc.{RpcAddress, RpcEndpointRef, RpcEnv}
@@ -56,6 +61,10 @@ class StandaloneDynamicAllocationSuite
     }
     master = makeMaster()
     workers = makeWorkers(10, 2048)
+    // Wait until all workers register with master successfully
+    eventually(timeout(60.seconds), interval(10.millis)) {
+      assert(getMasterState.workers.size === numWorkers)
+    }
   }
 
   override def afterAll(): Unit = {
@@ -73,167 +82,208 @@ class StandaloneDynamicAllocationSuite
   test("dynamic allocation default behavior") {
     sc = new SparkContext(appConf)
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // kill all executors
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    var apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 1)
     // request 1 more
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === 2)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 2)
     // request 1 more; this one won't go through
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === 3)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 3)
     // kill all existing executors; we should end up with 3 - 2 = 1 executor
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 1)
     // kill all executors again; this time we'll have 1 - 1 = 0 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request many more; this increases the limit well beyond the cluster capacity
     assert(sc.requestExecutors(1000))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === 1000)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 1000)
   }
 
   test("dynamic allocation with max cores <= cores per worker") {
     sc = new SparkContext(appConf.set("spark.cores.max", "8"))
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // kill all executors
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    var apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.executors.values.head.cores === 8)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.executors.values.head.cores === 8)
+    assert(apps.head.getExecutorLimit === 1)
     // request 1 more; this one won't go through because we're already at max cores.
     // This highlights a limitation of using dynamic allocation with max cores WITHOUT
     // setting cores per executor: once an application scales down and then scales back
     // up, its executors may not be spread out anymore!
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 2)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 2)
     // request 1 more; this one also won't go through for the same reason
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 3)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 3)
     // kill all existing executors; we should end up with 3 - 1 = 2 executor
     // Note: we scheduled these executors together, so their cores should be evenly distributed
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
-    assert(master.apps.head.getExecutorLimit === 2)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
+    assert(apps.head.getExecutorLimit === 2)
     // kill all executors again; this time we'll have 1 - 1 = 0 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request many more; this increases the limit well beyond the cluster capacity
     assert(sc.requestExecutors(1000))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
-    assert(master.apps.head.getExecutorLimit === 1000)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.executors.values.map(_.cores).toArray === Array(4, 4))
+    assert(apps.head.getExecutorLimit === 1000)
   }
 
   test("dynamic allocation with max cores > cores per worker") {
     sc = new SparkContext(appConf.set("spark.cores.max", "16"))
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toArray === Array(8, 8))
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.executors.values.map(_.cores).toArray === Array(8, 8))
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // kill all executors
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    var apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.executors.values.head.cores === 10)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.executors.values.head.cores === 10)
+    assert(apps.head.getExecutorLimit === 1)
     // request 1 more
     // Note: the cores are not evenly distributed because we scheduled these executors 1 by 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toSet === Set(10, 6))
-    assert(master.apps.head.getExecutorLimit === 2)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.executors.values.map(_.cores).toSet === Set(10, 6))
+    assert(apps.head.getExecutorLimit === 2)
     // request 1 more; this one won't go through
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === 3)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 3)
     // kill all existing executors; we should end up with 3 - 2 = 1 executor
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.executors.values.head.cores === 10)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.executors.values.head.cores === 10)
+    assert(apps.head.getExecutorLimit === 1)
     // kill all executors again; this time we'll have 1 - 1 = 0 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request many more; this increases the limit well beyond the cluster capacity
     assert(sc.requestExecutors(1000))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.executors.values.map(_.cores).toArray === Array(8, 8))
-    assert(master.apps.head.getExecutorLimit === 1000)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.executors.values.map(_.cores).toArray === Array(8, 8))
+    assert(apps.head.getExecutorLimit === 1000)
   }
 
   test("dynamic allocation with cores per executor") {
     sc = new SparkContext(appConf.set("spark.executor.cores", "2"))
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 10) // 20 cores total
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 10) // 20 cores total
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // kill all executors
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    var apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 1)
     // request 3 more
     assert(sc.requestExecutors(3))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 4)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 4)
     // request 10 more; only 6 will go through
     assert(sc.requestExecutors(10))
-    assert(master.apps.head.executors.size === 10)
-    assert(master.apps.head.getExecutorLimit === 14)
+    apps = getApplications()
+    assert(apps.head.executors.size === 10)
+    assert(apps.head.getExecutorLimit === 14)
     // kill 2 executors; we should get 2 back immediately
     assert(killNExecutors(sc, 2))
-    assert(master.apps.head.executors.size === 10)
-    assert(master.apps.head.getExecutorLimit === 12)
+    apps = getApplications()
+    assert(apps.head.executors.size === 10)
+    assert(apps.head.getExecutorLimit === 12)
     // kill 4 executors; we should end up with 12 - 4 = 8 executors
     assert(killNExecutors(sc, 4))
-    assert(master.apps.head.executors.size === 8)
-    assert(master.apps.head.getExecutorLimit === 8)
+    apps = getApplications()
+    assert(apps.head.executors.size === 8)
+    assert(apps.head.getExecutorLimit === 8)
     // kill all executors; this time we'll have 8 - 8 = 0 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request many more; this increases the limit well beyond the cluster capacity
     assert(sc.requestExecutors(1000))
-    assert(master.apps.head.executors.size === 10)
-    assert(master.apps.head.getExecutorLimit === 1000)
+    apps = getApplications()
+    assert(apps.head.executors.size === 10)
+    assert(apps.head.getExecutorLimit === 1000)
   }
 
   test("dynamic allocation with cores per executor AND max cores") {
@@ -241,55 +291,70 @@ class StandaloneDynamicAllocationSuite
       .set("spark.executor.cores", "2")
       .set("spark.cores.max", "8"))
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 4) // 8 cores total
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 4) // 8 cores total
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // kill all executors
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    var apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request 1
     assert(sc.requestExecutors(1))
-    assert(master.apps.head.executors.size === 1)
-    assert(master.apps.head.getExecutorLimit === 1)
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 1)
     // request 3 more
     assert(sc.requestExecutors(3))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 4)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 4)
     // request 10 more; none will go through
     assert(sc.requestExecutors(10))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 14)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 14)
     // kill all executors; 4 executors will be launched immediately
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 10)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 10)
     // ... and again
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 6)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 6)
     // ... and again; now we end up with 6 - 4 = 2 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === 2)
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 2)
     // ... and again; this time we have 2 - 2 = 0 executors left
     assert(killAllExecutors(sc))
-    assert(master.apps.head.executors.size === 0)
-    assert(master.apps.head.getExecutorLimit === 0)
+    apps = getApplications()
+    assert(apps.head.executors.size === 0)
+    assert(apps.head.getExecutorLimit === 0)
     // request many more; this increases the limit well beyond the cluster capacity
     assert(sc.requestExecutors(1000))
-    assert(master.apps.head.executors.size === 4)
-    assert(master.apps.head.getExecutorLimit === 1000)
+    apps = getApplications()
+    assert(apps.head.executors.size === 4)
+    assert(apps.head.getExecutorLimit === 1000)
   }
 
   test("kill the same executor twice (SPARK-9795)") {
     sc = new SparkContext(appConf)
     val appId = sc.applicationId
-    assert(master.apps.size === 1)
-    assert(master.apps.head.id === appId)
-    assert(master.apps.head.executors.size === 2)
-    assert(master.apps.head.getExecutorLimit === Int.MaxValue)
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
     // sync executors between the Master and the driver, needed because
     // the driver refuses to kill executors it does not know about
     syncExecutors(sc)
@@ -298,9 +363,10 @@ class StandaloneDynamicAllocationSuite
     assert(executors.size === 2)
     assert(sc.killExecutor(executors.head))
     assert(sc.killExecutor(executors.head))
-    assert(master.apps.head.executors.size === 1)
+    val apps = getApplications()
+    assert(apps.head.executors.size === 1)
     // The limit should not be lowered twice
-    assert(master.apps.head.getExecutorLimit === 1)
+    assert(apps.head.getExecutorLimit === 1)
   }
 
   // ===============================
@@ -333,6 +399,16 @@ class StandaloneDynamicAllocationSuite
     }
   }
 
+  /** Get the Master state */
+  private def getMasterState: MasterStateResponse = {
+    master.self.askWithRetry[MasterStateResponse](RequestMasterState)
+  }
+
+  /** Get the applictions that are active from Master */
+  private def getApplications(): Seq[ApplicationInfo] = {
+    getMasterState.activeApps
+  }
+
   /** Kill all executors belonging to this application. */
   private def killAllExecutors(sc: SparkContext): Boolean = {
     killNExecutors(sc, Int.MaxValue)
@@ -352,8 +428,11 @@ class StandaloneDynamicAllocationSuite
    * don't wait for executors to register. Otherwise the tests will take much longer to run.
    */
   private def getExecutorIds(sc: SparkContext): Seq[String] = {
-    assert(master.idToApp.contains(sc.applicationId))
-    master.idToApp(sc.applicationId).executors.keys.map(_.toString).toSeq
+    val app = getApplications().find(_.id == sc.applicationId)
+    assert(app.isDefined)
+    // Although executors is transient, master is in the same process so the message won't be
+    // serialized and it's safe here.
+    app.get.executors.keys.map(_.toString).toSeq
   }
 
   /**

From b7ad54ec793af1c84973b402f5cceb88307f7996 Mon Sep 17 00:00:00 2001
From: Ryan Williams <ryan.blake.williams@gmail.com>
Date: Tue, 29 Sep 2015 13:19:46 -0700
Subject: [PATCH 114/896] [SPARK-10871] include number of executor failures in
 error msg

Author: Ryan Williams <ryan.blake.williams@gmail.com>

Closes #8939 from ryan-williams/errmsg.
---
 .../scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 93621b44c918..07a0a45e60cb 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -345,7 +345,7 @@ private[spark] class ApplicationMaster(
             if (allocator.getNumExecutorsFailed >= maxNumExecutorFailures) {
               finish(FinalApplicationStatus.FAILED,
                 ApplicationMaster.EXIT_MAX_EXECUTOR_FAILURES,
-                "Max number of executor failures reached")
+                s"Max number of executor failures ($maxNumExecutorFailures) reached")
             } else {
               logDebug("Sending progress")
               allocator.allocateResources()

From ab41864f91713b450695babd5c1424622cb57a54 Mon Sep 17 00:00:00 2001
From: noelsmith <mail@noelsmith.com>
Date: Tue, 29 Sep 2015 13:24:42 -0700
Subject: [PATCH 115/896] [SPARK-10415] [PYSPARK] [MLLIB] [DOCS] Enhance
 Navigation Sidebar in PySpark API

These are CSS/JavaScript changes changes to make navigation in the PySpark API a bit simpler by adding the following to the sidebar:

* Classes
* Functions
* Tags to highlight experimental features

![screen shot 2015-09-02 at 08 50 12](https://cloud.githubusercontent.com/assets/11915197/9634781/301f853a-518b-11e5-8d5c-fda202f6202f.png)

Online example here: https://dl.dropboxusercontent.com/u/20821334/pyspark-api-nav-enhance/pyspark.mllib.html

(The contribution is my original work and that I license the work to the project under the project's open source license)

Author: noelsmith <mail@noelsmith.com>

Closes #8571 from noel-smith/pyspark-api-nav-enhance.
---
 python/docs/_static/pyspark.css    | 90 +++++++++++++++++++++++++++
 python/docs/_static/pyspark.js     | 99 ++++++++++++++++++++++++++++++
 python/docs/_templates/layout.html |  6 ++
 python/docs/conf.py                |  4 +-
 4 files changed, 197 insertions(+), 2 deletions(-)
 create mode 100644 python/docs/_static/pyspark.css
 create mode 100644 python/docs/_static/pyspark.js
 create mode 100644 python/docs/_templates/layout.html

diff --git a/python/docs/_static/pyspark.css b/python/docs/_static/pyspark.css
new file mode 100644
index 000000000000..41106f2f6e26
--- /dev/null
+++ b/python/docs/_static/pyspark.css
@@ -0,0 +1,90 @@
+/*
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+body {
+    background-color: #ffffff;
+}
+
+div.sphinxsidebar {
+    width: 274px;
+}
+
+div.bodywrapper {
+    margin: 0 0 0 274px;
+}
+
+div.sphinxsidebar ul {
+    margin-right: 10px;
+}
+
+div.sphinxsidebar li a {
+    word-break: break-all;
+}
+
+span.pys-tag {
+    font-size: 11px;
+    font-weight: bold;
+    margin: 0 0 0 2px;
+    padding: 1px 3px 1px 3px;
+    -moz-border-radius: 3px;
+    -webkit-border-radius: 3px;
+    border-radius: 3px;
+    text-align: center;
+    text-decoration: none;
+}
+
+span.pys-tag-experimental {
+    background-color: rgb(37, 112, 128);
+    color: rgb(255, 255, 255);
+}
+
+span.pys-tag-deprecated {
+    background-color: rgb(238, 238, 238);
+    color: rgb(62, 67, 73);
+}
+
+div.pys-note-experimental {
+    background-color: rgb(88, 151, 165);
+    border-color: rgb(59, 115, 127);
+    color: rgb(255, 255, 255);
+}
+
+div.pys-note-deprecated {
+}
+
+.hasTooltip {
+    position:relative;
+}
+.hasTooltip span {
+    display:none;
+}
+
+.hasTooltip:hover span.tooltip {
+    display: inline-block;
+    -moz-border-radius: 2px;
+    -webkit-border-radius: 2px;
+    border-radius: 2px;
+    background-color: rgb(250, 250, 250);
+    color: rgb(68, 68, 68);
+    font-weight: normal;
+    box-shadow: 1px 1px 3px rgb(127, 127, 127);
+    position: absolute;
+    padding: 0 3px 0 3px;
+    top: 1.3em;
+    left: 14px;
+    z-index: 9999
+}
diff --git a/python/docs/_static/pyspark.js b/python/docs/_static/pyspark.js
new file mode 100644
index 000000000000..75e4c42492a4
--- /dev/null
+++ b/python/docs/_static/pyspark.js
@@ -0,0 +1,99 @@
+/*
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements.  See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You under the Apache License, Version 2.0
+ (the "License"); you may not use this file except in compliance with
+ the License.  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+$(function (){
+
+    function startsWith(s, prefix) {
+        return s && s.indexOf(prefix) === 0;
+    }
+
+    function buildSidebarLinkMap() {
+        var linkMap = {};
+        $('div.sphinxsidebar a.reference.internal').each(function (i,a)  {
+            var href = $(a).attr('href');
+            if (startsWith(href, '#module-')) {
+                var id = href.substr(8);
+                linkMap[id] = [$(a), null];
+            }
+        })
+        return linkMap;
+    };
+
+    function getAdNoteDivs(dd) {
+        var noteDivs = {};
+        dd.find('> div.admonition.note > p.last').each(function (i, p) {
+            var text = $(p).text();
+            if (!noteDivs.experimental && startsWith(text, 'Experimental')) {
+                noteDivs.experimental = $(p).parent();
+            }
+            if (!noteDivs.deprecated && startsWith(text, 'Deprecated')) {
+                noteDivs.deprecated = $(p).parent();
+            }
+        });
+        return noteDivs;
+    }
+
+    function getParentId(name) {
+        var last_idx = name.lastIndexOf('.');
+        return last_idx == -1? '': name.substr(0, last_idx);
+    }
+
+    function buildTag(text, cls, tooltip) {
+        return '<span class="pys-tag ' + cls + ' hasTooltip">' + text + '<span class="tooltip">'
+            + tooltip + '</span></span>'
+    }
+
+
+    var sidebarLinkMap = buildSidebarLinkMap();
+
+    $('dl.class, dl.function').each(function (i,dl)  {
+
+        dl = $(dl);
+        dt = dl.children('dt').eq(0);
+        dd = dl.children('dd').eq(0);
+        var id = dt.attr('id');
+        var desc = dt.find('> .descname').text();
+        var adNoteDivs = getAdNoteDivs(dd);
+
+        if (id) {
+            var parent_id = getParentId(id);
+
+            var r = sidebarLinkMap[parent_id];
+            if (r) {
+                if (r[1] === null) {
+                    r[1] = $('<ul/>');
+                    r[0].parent().append(r[1]);
+                }
+                var tags = '';
+                if (adNoteDivs.experimental) {
+                    tags += buildTag('E', 'pys-tag-experimental', 'Experimental');
+                    adNoteDivs.experimental.addClass('pys-note pys-note-experimental');
+                }
+                if (adNoteDivs.deprecated) {
+                    tags += buildTag('D', 'pys-tag-deprecated', 'Deprecated');
+                    adNoteDivs.deprecated.addClass('pys-note pys-note-deprecated');
+                }
+                var li = $('<li/>');
+                var a = $('<a href="#' + id + '">' + desc + '</a>');
+                li.append(a);
+                li.append(tags);
+                r[1].append(li);
+                sidebarLinkMap[id] = [a, null];
+            }
+        }
+    });
+});
diff --git a/python/docs/_templates/layout.html b/python/docs/_templates/layout.html
new file mode 100644
index 000000000000..ab36ebababf8
--- /dev/null
+++ b/python/docs/_templates/layout.html
@@ -0,0 +1,6 @@
+{% extends "!layout.html" %}
+{% set script_files = script_files + ["_static/pyspark.js"] %}
+{% set css_files = css_files + ['_static/pyspark.css'] %}
+{% block rootrellink %}
+    {{ super() }}
+{% endblock %}
diff --git a/python/docs/conf.py b/python/docs/conf.py
index 163987dd8e5f..365d6af51417 100644
--- a/python/docs/conf.py
+++ b/python/docs/conf.py
@@ -23,7 +23,7 @@
 # -- General configuration ------------------------------------------------
 
 # If your documentation needs a minimal Sphinx version, state it here.
-#needs_sphinx = '1.0'
+needs_sphinx = '1.2'
 
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
@@ -135,7 +135,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-#html_static_path = ['_static']
+html_static_path = ['_static']
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied

From 7d399c9daa6769ab234890c551e1b3456e0e6e85 Mon Sep 17 00:00:00 2001
From: Erik Shilts <erik.shilts@opower.com>
Date: Tue, 29 Sep 2015 13:38:15 -0700
Subject: [PATCH 116/896] [SPARK-6919] [PYSPARK] Add asDict method to
 StatCounter

Add method to easily convert a StatCounter instance into a Python dict

https://issues.apache.org/jira/browse/SPARK-6919

Note: This is my original work and the existing Spark license applies.

Author: Erik Shilts <erik.shilts@opower.com>

Closes #5516 from eshilts/statcounter-asdict.
---
 python/pyspark/statcounter.py | 22 ++++++++++++++++++++++
 python/pyspark/tests.py       | 20 ++++++++++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/python/pyspark/statcounter.py b/python/pyspark/statcounter.py
index 0fee3b209682..03ea0b6d33c9 100644
--- a/python/pyspark/statcounter.py
+++ b/python/pyspark/statcounter.py
@@ -131,6 +131,28 @@ def stdev(self):
     def sampleStdev(self):
         return sqrt(self.sampleVariance())
 
+    def asDict(self, sample=False):
+        """Returns the :class:`StatCounter` members as a ``dict``.
+
+        >>> sc.parallelize([1., 2., 3., 4.]).stats().asDict()
+        {'count': 4L,
+         'max': 4.0,
+         'mean': 2.5,
+         'min': 1.0,
+         'stdev': 1.2909944487358056,
+         'sum': 10.0,
+         'variance': 1.6666666666666667}
+        """
+        return {
+            'count': self.count(),
+            'mean': self.mean(),
+            'sum': self.sum(),
+            'min': self.min(),
+            'max': self.max(),
+            'stdev': self.stdev() if sample else self.sampleStdev(),
+            'variance': self.variance() if sample else self.sampleVariance()
+        }
+
     def __repr__(self):
         return ("(count: %s, mean: %s, stdev: %s, max: %s, min: %s)" %
                 (self.count(), self.mean(), self.stdev(), self.max(), self.min()))
diff --git a/python/pyspark/tests.py b/python/pyspark/tests.py
index f11aaf001c8d..63cc87e0c4b2 100644
--- a/python/pyspark/tests.py
+++ b/python/pyspark/tests.py
@@ -1976,6 +1976,26 @@ def test_statcounter_array(self):
         self.assertSequenceEqual([3.0, 3.0], s.max().tolist())
         self.assertSequenceEqual([1.0, 1.0], s.sampleStdev().tolist())
 
+        stats_dict = s.asDict()
+        self.assertEqual(3, stats_dict['count'])
+        self.assertSequenceEqual([2.0, 2.0], stats_dict['mean'].tolist())
+        self.assertSequenceEqual([1.0, 1.0], stats_dict['min'].tolist())
+        self.assertSequenceEqual([3.0, 3.0], stats_dict['max'].tolist())
+        self.assertSequenceEqual([6.0, 6.0], stats_dict['sum'].tolist())
+        self.assertSequenceEqual([1.0, 1.0], stats_dict['stdev'].tolist())
+        self.assertSequenceEqual([1.0, 1.0], stats_dict['variance'].tolist())
+
+        stats_sample_dict = s.asDict(sample=True)
+        self.assertEqual(3, stats_dict['count'])
+        self.assertSequenceEqual([2.0, 2.0], stats_sample_dict['mean'].tolist())
+        self.assertSequenceEqual([1.0, 1.0], stats_sample_dict['min'].tolist())
+        self.assertSequenceEqual([3.0, 3.0], stats_sample_dict['max'].tolist())
+        self.assertSequenceEqual([6.0, 6.0], stats_sample_dict['sum'].tolist())
+        self.assertSequenceEqual(
+            [0.816496580927726, 0.816496580927726], stats_sample_dict['stdev'].tolist())
+        self.assertSequenceEqual(
+            [0.6666666666666666, 0.6666666666666666], stats_sample_dict['variance'].tolist())
+
 
 if __name__ == "__main__":
     if not _have_scipy:

From c1ad373f26053e1906fce7681c03d130a642bf33 Mon Sep 17 00:00:00 2001
From: asokadiggs <asoka.diggs@intel.com>
Date: Tue, 29 Sep 2015 17:45:18 -0400
Subject: [PATCH 117/896] [SPARK-10782] [PYTHON] Update dropDuplicates
 documentation

Documentation for dropDuplicates() and drop_duplicates() is one and the same.  Resolved the error in the example for drop_duplicates using the same approach used for groupby and groupBy, by indicating that dropDuplicates and drop_duplicates are aliases.

Author: asokadiggs <asoka.diggs@intel.com>

Closes #8930 from asokadiggs/jira-10782.
---
 python/pyspark/sql/dataframe.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index b09422aadef8..033b31983ffa 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -931,6 +931,8 @@ def dropDuplicates(self, subset=None):
         """Return a new :class:`DataFrame` with duplicate rows removed,
         optionally only considering certain columns.
 
+        :func:`drop_duplicates` is an alias for :func:`dropDuplicates`.
+
         >>> from pyspark.sql import Row
         >>> df = sc.parallelize([ \
             Row(name='Alice', age=5, height=80), \

From 4d5a005b0d2591d4d57a19be48c4954b9f1434a9 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Tue, 29 Sep 2015 23:30:27 -0700
Subject: [PATCH 118/896] [SPARK-10811] [SQL] Eliminates unnecessary byte array
 copying

When reading Parquet string and binary-backed decimal values, Parquet `Binary.getBytes` always returns a copied byte array, which is unnecessary. Since the underlying implementation of `Binary` values there is guaranteed to be `ByteArraySliceBackedBinary`, and Parquet itself never reuses underlying byte arrays, we can use `Binary.toByteBuffer.array()` to steal the underlying byte arrays without copying them.

This brings performance benefits when scanning Parquet string and binary-backed decimal columns. Note that, this trick doesn't cover binary-backed decimals with precision greater than 18.

My micro-benchmark result is that, this brings a ~15% performance boost for scanning TPC-DS `store_sales` table (scale factor 15).

Another minor optimization done in this PR is that, now we directly construct a Java `BigDecimal` in `Decimal.toJavaBigDecimal` without constructing a Scala `BigDecimal` first. This brings another ~5% performance gain.

Author: Cheng Lian <lian@databricks.com>

Closes #8907 from liancheng/spark-10811/eliminate-array-copying.
---
 .../org/apache/spark/sql/types/Decimal.scala  |  8 +++++-
 .../parquet/CatalystRowConverter.scala        | 26 ++++++++++++++-----
 .../parquet/CatalystSchemaConverter.scala     |  4 +--
 3 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
index c988f1d1b972..bfcf111385b7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
@@ -145,7 +145,13 @@ final class Decimal extends Ordered[Decimal] with Serializable {
     }
   }
 
-  def toJavaBigDecimal: java.math.BigDecimal = toBigDecimal.underlying()
+  def toJavaBigDecimal: java.math.BigDecimal = {
+    if (decimalVal.ne(null)) {
+      decimalVal.underlying()
+    } else {
+      java.math.BigDecimal.valueOf(longVal, _scale)
+    }
+  }
 
   def toUnscaledLong: Long = {
     if (decimalVal.ne(null)) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index 2ff2fda3610b..050d3610a641 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -302,7 +302,13 @@ private[parquet] class CatalystRowConverter(
     }
 
     override def addBinary(value: Binary): Unit = {
-      updater.set(UTF8String.fromBytes(value.getBytes))
+      // The underlying `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here we
+      // are using `Binary.toByteBuffer.array()` to steal the underlying byte array without copying
+      // it.
+      val buffer = value.toByteBuffer
+      val offset = buffer.position()
+      val numBytes = buffer.limit() - buffer.position()
+      updater.set(UTF8String.fromBytes(buffer.array(), offset, numBytes))
     }
   }
 
@@ -332,24 +338,30 @@ private[parquet] class CatalystRowConverter(
     private def toDecimal(value: Binary): Decimal = {
       val precision = decimalType.precision
       val scale = decimalType.scale
-      val bytes = value.getBytes
 
       if (precision <= CatalystSchemaConverter.MAX_PRECISION_FOR_INT64) {
-        // Constructs a `Decimal` with an unscaled `Long` value if possible.
+        // Constructs a `Decimal` with an unscaled `Long` value if possible.  The underlying
+        // `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here we are using
+        // `Binary.toByteBuffer.array()` to steal the underlying byte array without copying it.
+        val buffer = value.toByteBuffer
+        val bytes = buffer.array()
+        val start = buffer.position()
+        val end = buffer.limit()
+
         var unscaled = 0L
-        var i = 0
+        var i = start
 
-        while (i < bytes.length) {
+        while (i < end) {
           unscaled = (unscaled << 8) | (bytes(i) & 0xff)
           i += 1
         }
 
-        val bits = 8 * bytes.length
+        val bits = 8 * (end - start)
         unscaled = (unscaled << (64 - bits)) >> (64 - bits)
         Decimal(unscaled, precision, scale)
       } else {
         // Otherwise, resorts to an unscaled `BigInteger` instead.
-        Decimal(new BigDecimal(new BigInteger(bytes), scale), precision, scale)
+        Decimal(new BigDecimal(new BigInteger(value.getBytes), scale), precision, scale)
       }
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
index 2d237da81c20..97ffeb08aafe 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
@@ -567,9 +567,9 @@ private[parquet] object CatalystSchemaConverter {
     }
   }
 
-  val MAX_PRECISION_FOR_INT32 = maxPrecisionForBytes(4)
+  val MAX_PRECISION_FOR_INT32 = maxPrecisionForBytes(4) /* 9 */
 
-  val MAX_PRECISION_FOR_INT64 = maxPrecisionForBytes(8)
+  val MAX_PRECISION_FOR_INT64 = maxPrecisionForBytes(8) /* 18 */
 
   // Max precision of a decimal value stored in `numBytes` bytes
   def maxPrecisionForBytes(numBytes: Int): Int = {

From 2931e89f0c54248d87f1f84c81137a5a91e142e9 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 29 Sep 2015 23:58:32 -0700
Subject: [PATCH 119/896] [SPARK-10736] [ML] Use 1 for all ratings if
 $(ratingCol) = ""

For some implicit dataset, ratings may not exist in the training data. In this case, we can assume all observed pairs to be positive and treat their ratings as 1. This should happen when users set ```ratingCol``` to an empty string.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8937 from yanboliang/spark-10736.
---
 .../main/scala/org/apache/spark/ml/recommendation/ALS.scala   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index 9a56a75b69d0..f6f5281f71a5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -315,9 +315,9 @@ class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams {
 
   override def fit(dataset: DataFrame): ALSModel = {
     import dataset.sqlContext.implicits._
+    val r = if ($(ratingCol) != "") col($(ratingCol)).cast(FloatType) else lit(1.0f)
     val ratings = dataset
-      .select(col($(userCol)).cast(IntegerType), col($(itemCol)).cast(IntegerType),
-        col($(ratingCol)).cast(FloatType))
+      .select(col($(userCol)).cast(IntegerType), col($(itemCol)).cast(IntegerType), r)
       .map { row =>
         Rating(row.getInt(0), row.getInt(1), row.getFloat(2))
       }

From 16fd2a2f4225771af43403f20fbc79b6c914ee4d Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Wed, 30 Sep 2015 10:12:52 -0700
Subject: [PATCH 120/896] [SPARK-9741] [SQL] Approximate Count Distinct using
 the new UDAF interface.

This PR implements a HyperLogLog based Approximate Count Distinct function using the new UDAF interface.

The implementation is inspired by the ClearSpring HyperLogLog implementation and should produce the same results.

There is still some documentation and testing left to do.

cc yhuai

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #8362 from hvanhovell/SPARK-9741.
---
 .../expressions/aggregate/functions.scala     | 399 ++++++++++++++++++
 .../expressions/aggregate/utils.scala         |   6 +
 .../aggregate/HyperLogLogPlusPlusSuite.scala  | 149 +++++++
 3 files changed, 554 insertions(+)
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 02cd0ac0db11..e7f8104d439c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -17,6 +17,11 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import java.lang.{Long => JLong}
+import java.util
+
+import com.clearspring.analytics.hash.MurmurHash
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
@@ -445,3 +450,397 @@ case class Sum(child: Expression) extends AlgebraicAggregate {
 
   override val evaluateExpression = Cast(currentSum, resultType)
 }
+
+// scalastyle:off
+/**
+ * HyperLogLog++ (HLL++) is a state of the art cardinality estimation algorithm. This class
+ * implements the dense version of the HLL++ algorithm as an Aggregate Function.
+ *
+ * This implementation has been based on the following papers:
+ * HyperLogLog: the analysis of a near-optimal cardinality estimation algorithm
+ * http://algo.inria.fr/flajolet/Publications/FlFuGaMe07.pdf
+ *
+ * HyperLogLog in Practice: Algorithmic Engineering of a State of The Art Cardinality Estimation
+ * Algorithm
+ * http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en/us/pubs/archive/40671.pdf
+ *
+ * Appendix to HyperLogLog in Practice: Algorithmic Engineering of a State of the Art Cardinality
+ * Estimation Algorithm
+ * https://docs.google.com/document/d/1gyjfMHy43U9OWBXxfaeG-3MjGzejW1dlpyMwEYAAWEI/view?fullscreen#
+ *
+ * @param child to estimate the cardinality of.
+ * @param relativeSD the maximum estimation error allowed.
+ */
+// scalastyle:on
+case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
+    extends AggregateFunction2 {
+  import HyperLogLogPlusPlus._
+
+  /**
+   * HLL++ uses 'p' bits for addressing. The more addressing bits we use, the more precise the
+   * algorithm will be, and the more memory it will require. The 'p' value is based on the relative
+   * error requested.
+   *
+   * HLL++ requires that we use at least 4 bits of addressing space (a minimum precision of 27%).
+   *
+   * This method rounds up to the nearest integer. This means that the error is always equal to or
+   * lower than the requested error. Use the <code>trueRsd</code> method to get the actual RSD
+   * value.
+   */
+  private[this] val p = Math.ceil(2.0d * Math.log(1.106d / relativeSD) / Math.log(2.0d)).toInt
+
+  require(p >= 4, "HLL++ requires at least 4 bits for addressing. " +
+    "Use a lower error, at most 27%.")
+
+  /**
+   * Shift used to extract the index of the register from the hashed value.
+   *
+   * This assumes the use of 64-bit hashcodes.
+   */
+  private[this] val idxShift = JLong.SIZE - p
+
+  /**
+   * Value to pad the 'w' value with before the number of leading zeros is determined.
+   */
+  private[this] val wPadding = 1L << (p - 1)
+
+  /**
+   * The number of registers used.
+   */
+  private[this] val m = 1 << p
+
+  /**
+   * The pre-calculated combination of: alpha * m * m
+   *
+   * 'alpha' corrects the raw cardinality estimate 'Z'. See the FlFuGaMe07 paper for its
+   * derivation.
+   */
+  private[this] val alphaM2 = p match {
+    case 4 => 0.673d * m * m
+    case 5 => 0.697d * m * m
+    case 6 => 0.709d * m * m
+    case _ => (0.7213d / (1.0d + 1.079d / m)) * m * m
+  }
+
+  /**
+   * The number of words used to store the registers. We use Longs for storage because this is the
+   * most compact way of storage; Spark aligns to 8-byte words or uses Long wrappers.
+   *
+   * We only store whole registers per word in order to prevent overly complex bitwise operations.
+   * In practice this means we only use 60 out of 64 bits.
+   */
+  private[this] val numWords = m / REGISTERS_PER_WORD + 1
+
+  def children: Seq[Expression] = Seq(child)
+
+  def nullable: Boolean = false
+
+  def dataType: DataType = LongType
+
+  def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  def bufferSchema: StructType = StructType.fromAttributes(bufferAttributes)
+
+  def cloneBufferAttributes: Seq[Attribute] = bufferAttributes.map(_.newInstance())
+
+  /** Allocate enough words to store all registers. */
+  val bufferAttributes: Seq[AttributeReference] = Seq.tabulate(numWords) { i =>
+    AttributeReference(s"MS[$i]", LongType)()
+  }
+
+  /** Fill all words with zeros. */
+  def initialize(buffer: MutableRow): Unit = {
+    var word = 0
+    while (word < numWords) {
+      buffer.setLong(mutableBufferOffset + word, 0)
+      word += 1
+    }
+  }
+
+  /**
+   * Update the HLL++ buffer.
+   *
+   * Variable names in the HLL++ paper match variable names in the code.
+   */
+  def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val v = child.eval(input)
+    if (v != null) {
+      // Create the hashed value 'x'.
+      val x = MurmurHash.hash64(v)
+
+      // Determine the index of the register we are going to use.
+      val idx = (x >>> idxShift).toInt
+
+      // Determine the number of leading zeros in the remaining bits 'w'.
+      val pw = JLong.numberOfLeadingZeros((x << p) | wPadding) + 1L
+
+      // Get the word containing the register we are interested in.
+      val wordOffset = idx / REGISTERS_PER_WORD
+      val word = buffer.getLong(mutableBufferOffset + wordOffset)
+
+      // Extract the M[J] register value from the word.
+      val shift = REGISTER_SIZE * (idx - (wordOffset * REGISTERS_PER_WORD))
+      val mask = REGISTER_WORD_MASK << shift
+      val Midx = (word & mask) >>> shift
+
+      // Assign the maximum number of leading zeros to the register.
+      if (pw > Midx) {
+        buffer.setLong(mutableBufferOffset + wordOffset, (word & ~mask) | (pw << shift))
+      }
+    }
+  }
+
+  /**
+   * Merge the HLL buffers by iterating through the registers in both buffers and select the
+   * maximum number of leading zeros for each register.
+   */
+  def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    var idx = 0
+    var wordOffset = 0
+    while (wordOffset < numWords) {
+      val word1 = buffer1.getLong(mutableBufferOffset + wordOffset)
+      val word2 = buffer2.getLong(inputBufferOffset + wordOffset)
+      var word = 0L
+      var i = 0
+      var mask = REGISTER_WORD_MASK
+      while (idx < m && i < REGISTERS_PER_WORD) {
+        word |= Math.max(word1 & mask, word2 & mask)
+        mask <<= REGISTER_SIZE
+        i += 1
+        idx += 1
+      }
+      buffer1.setLong(mutableBufferOffset + wordOffset, word)
+      wordOffset += 1
+    }
+  }
+
+  /**
+   * Estimate the bias using the raw estimates with their respective biases from the HLL++
+   * appendix. We currently use KNN interpolation to determine the bias (as suggested in the
+   * paper).
+   */
+  def estimateBias(e: Double): Double = {
+    val estimates = RAW_ESTIMATE_DATA(p - 4)
+    val numEstimates = estimates.length
+
+    // The estimates are sorted so we can use a binary search to find the index of the
+    // interpolation estimate closest to the current estimate.
+    val nearestEstimateIndex = util.Arrays.binarySearch(estimates, 0, numEstimates, e) match {
+      case ix if ix < 0 => -(ix + 1)
+      case ix => ix
+    }
+
+    // Use square of the difference between the current estimate and the estimate at the given
+    // index as distance metric.
+    def distance(i: Int): Double = {
+      val diff = e - estimates(i)
+      diff * diff
+    }
+
+    // Keep moving bounds as long as the the (exclusive) high bound is closer to the estimate than
+    // the lower (inclusive) bound.
+    var low = math.max(nearestEstimateIndex - K + 1, 0)
+    var high = math.min(low + K, numEstimates)
+    while (high < numEstimates && distance(high) < distance(low)) {
+      low += 1
+      high += 1
+    }
+
+    // Calculate the sum of the biases in low-high interval.
+    val biases = BIAS_DATA(p - 4)
+    var i = low
+    var biasSum = 0.0
+    while (i < high) {
+      biasSum += biases(i)
+      i += 1
+    }
+
+    // Calculate the bias.
+    biasSum / (high - low)
+  }
+
+  /**
+   * Compute the HyperLogLog estimate.
+   *
+   * Variable names in the HLL++ paper match variable names in the code.
+   */
+  def eval(buffer: InternalRow): Any = {
+    // Compute the inverse of indicator value 'z' and count the number of zeros 'V'.
+    var zInverse = 0.0d
+    var V = 0.0d
+    var idx = 0
+    var wordOffset = 0
+    while (wordOffset < numWords) {
+      val word = buffer.getLong(mutableBufferOffset + wordOffset)
+      var i = 0
+      var shift = 0
+      while (idx < m && i < REGISTERS_PER_WORD) {
+        val Midx = (word >>> shift) & REGISTER_WORD_MASK
+        zInverse += 1.0 / (1 << Midx)
+        if (Midx == 0) {
+          V += 1.0d
+        }
+        shift += REGISTER_SIZE
+        i += 1
+        idx += 1
+      }
+      wordOffset += 1
+    }
+
+    // We integrate two steps from the paper:
+    // val Z = 1.0d / zInverse
+    // val E = alphaM2 * Z
+    @inline
+    def EBiasCorrected = alphaM2 / zInverse match {
+      case e if p < 19 && e < 5.0d * m => e - estimateBias(e)
+      case e => e
+    }
+
+    // Estimate the cardinality.
+    val estimate = if (V > 0) {
+      // Use linear counting for small cardinality estimates.
+      val H = m * Math.log(m / V)
+      if (H <= THRESHOLDS(p - 4)) {
+        H
+      } else {
+        EBiasCorrected
+      }
+    } else {
+      EBiasCorrected
+    }
+
+    // Round to the nearest long value.
+    Math.round(estimate)
+  }
+
+  /**
+   * The <code>rsd</code> of HLL++ is always equal to or better than the <code>rsd</code> requested.
+   * This method returns the <code>rsd</code> this instance actually guarantees.
+   *
+   * @return the actual <code>rsd</code>.
+   */
+  def trueRsd: Double = 1.04 / math.sqrt(m)
+}
+
+// scalastyle:off
+/**
+ * Constants used in the implementation of the HyperLogLogPlusPlus aggregate function.
+ *
+ * See the Appendix to HyperLogLog in Practice: Algorithmic Engineering of a State of the Art
+ * Cardinality (https://docs.google.com/document/d/1gyjfMHy43U9OWBXxfaeG-3MjGzejW1dlpyMwEYAAWEI/view?fullscreen)
+ * for more information.
+ */
+// scalastyle:on
+object HyperLogLogPlusPlus {
+  /**
+   * The size of a word used for storing registers: 64 Bits.
+   */
+  val WORD_SIZE = java.lang.Long.SIZE
+
+  /**
+   * The number of bits that is required per register.
+   *
+   * This number is determined by the maximum number of leading binary zeros a hashcode can
+   * produce. This is equal to the number of bits the hashcode returns. The current
+   * implementation uses a 64-bit hashcode, this means 6-bits are (at most) needed to store the
+   * number of leading zeros.
+   */
+  val REGISTER_SIZE = 6
+
+  /**
+   * Value used to mask a register stored in a word.
+   */
+  val REGISTER_WORD_MASK: Long = (1 << REGISTER_SIZE) - 1
+
+  /**
+   * The number of registers which can be stored in one word.
+   */
+  val REGISTERS_PER_WORD = WORD_SIZE / REGISTER_SIZE
+
+  /**
+   * Number of points used for interpolating the bias value.
+   */
+  val K = 6
+
+  // Sacrificing style for readability here.
+  // scalastyle:off
+
+  /**
+   * Thresholds which decide if the linear counting or the regular algorithm is used.
+   */
+  val THRESHOLDS = Array[Double](10, 20, 40, 80, 220, 400, 900, 1800, 3100, 6500, 15500, 20000, 50000, 120000, 350000)
+
+  /**
+   * Lookup table used to find the (index of the) bias correction for a given precision (exact)
+   * and estimate (nearest).
+   */
+  val RAW_ESTIMATE_DATA = Array(
+    // precision 4
+    Array(11, 11.717, 12.207, 12.7896, 13.2882, 13.8204, 14.3772, 14.9342, 15.5202, 16.161, 16.7722, 17.4636, 18.0396, 18.6766, 19.3566, 20.0454, 20.7936, 21.4856, 22.2666, 22.9946, 23.766, 24.4692, 25.3638, 26.0764, 26.7864, 27.7602, 28.4814, 29.433, 30.2926, 31.0664, 31.9996, 32.7956, 33.5366, 34.5894, 35.5738, 36.2698, 37.3682, 38.0544, 39.2342, 40.0108, 40.7966, 41.9298, 42.8704, 43.6358, 44.5194, 45.773, 46.6772, 47.6174, 48.4888, 49.3304, 50.2506, 51.4996, 52.3824, 53.3078, 54.3984, 55.5838, 56.6618, 57.2174, 58.3514, 59.0802, 60.1482, 61.0376, 62.3598, 62.8078, 63.9744, 64.914, 65.781, 67.1806, 68.0594, 68.8446, 69.7928, 70.8248, 71.8324, 72.8598, 73.6246, 74.7014, 75.393, 76.6708, 77.2394),
+    // precision 5
+    Array(23, 23.1194, 23.8208, 24.2318, 24.77, 25.2436, 25.7774, 26.2848, 26.8224, 27.3742, 27.9336, 28.503, 29.0494, 29.6292, 30.2124, 30.798, 31.367, 31.9728, 32.5944, 33.217, 33.8438, 34.3696, 35.0956, 35.7044, 36.324, 37.0668, 37.6698, 38.3644, 39.049, 39.6918, 40.4146, 41.082, 41.687, 42.5398, 43.2462, 43.857, 44.6606, 45.4168, 46.1248, 46.9222, 47.6804, 48.447, 49.3454, 49.9594, 50.7636, 51.5776, 52.331, 53.19, 53.9676, 54.7564, 55.5314, 56.4442, 57.3708, 57.9774, 58.9624, 59.8796, 60.755, 61.472, 62.2076, 63.1024, 63.8908, 64.7338, 65.7728, 66.629, 67.413, 68.3266, 69.1524, 70.2642, 71.1806, 72.0566, 72.9192, 73.7598, 74.3516, 75.5802, 76.4386, 77.4916, 78.1524, 79.1892, 79.8414, 80.8798, 81.8376, 82.4698, 83.7656, 84.331, 85.5914, 86.6012, 87.7016, 88.5582, 89.3394, 90.3544, 91.4912, 92.308, 93.3552, 93.9746, 95.2052, 95.727, 97.1322, 98.3944, 98.7588, 100.242, 101.1914, 102.2538, 102.8776, 103.6292, 105.1932, 105.9152, 107.0868, 107.6728, 108.7144, 110.3114, 110.8716, 111.245, 112.7908, 113.7064, 114.636, 115.7464, 116.1788, 117.7464, 118.4896, 119.6166, 120.5082, 121.7798, 122.9028, 123.4426, 124.8854, 125.705, 126.4652, 128.3464, 128.3462, 130.0398, 131.0342, 131.0042, 132.4766, 133.511, 134.7252, 135.425, 136.5172, 138.0572, 138.6694, 139.3712, 140.8598, 141.4594, 142.554, 143.4006, 144.7374, 146.1634, 146.8994, 147.605, 147.9304, 149.1636, 150.2468, 151.5876, 152.2096, 153.7032, 154.7146, 155.807, 156.9228, 157.0372, 158.5852),
+    // precision 6
+    Array(46, 46.1902, 47.271, 47.8358, 48.8142, 49.2854, 50.317, 51.354, 51.8924, 52.9436, 53.4596, 54.5262, 55.6248, 56.1574, 57.2822, 57.837, 58.9636, 60.074, 60.7042, 61.7976, 62.4772, 63.6564, 64.7942, 65.5004, 66.686, 67.291, 68.5672, 69.8556, 70.4982, 71.8204, 72.4252, 73.7744, 75.0786, 75.8344, 77.0294, 77.8098, 79.0794, 80.5732, 81.1878, 82.5648, 83.2902, 84.6784, 85.3352, 86.8946, 88.3712, 89.0852, 90.499, 91.2686, 92.6844, 94.2234, 94.9732, 96.3356, 97.2286, 98.7262, 100.3284, 101.1048, 102.5962, 103.3562, 105.1272, 106.4184, 107.4974, 109.0822, 109.856, 111.48, 113.2834, 114.0208, 115.637, 116.5174, 118.0576, 119.7476, 120.427, 122.1326, 123.2372, 125.2788, 126.6776, 127.7926, 129.1952, 129.9564, 131.6454, 133.87, 134.5428, 136.2, 137.0294, 138.6278, 139.6782, 141.792, 143.3516, 144.2832, 146.0394, 147.0748, 148.4912, 150.849, 151.696, 153.5404, 154.073, 156.3714, 157.7216, 158.7328, 160.4208, 161.4184, 163.9424, 165.2772, 166.411, 168.1308, 168.769, 170.9258, 172.6828, 173.7502, 175.706, 176.3886, 179.0186, 180.4518, 181.927, 183.4172, 184.4114, 186.033, 188.5124, 189.5564, 191.6008, 192.4172, 193.8044, 194.997, 197.4548, 198.8948, 200.2346, 202.3086, 203.1548, 204.8842, 206.6508, 206.6772, 209.7254, 210.4752, 212.7228, 214.6614, 215.1676, 217.793, 218.0006, 219.9052, 221.66, 223.5588, 225.1636, 225.6882, 227.7126, 229.4502, 231.1978, 232.9756, 233.1654, 236.727, 238.1974, 237.7474, 241.1346, 242.3048, 244.1948, 245.3134, 246.879, 249.1204, 249.853, 252.6792, 253.857, 254.4486, 257.2362, 257.9534, 260.0286, 260.5632, 262.663, 264.723, 265.7566, 267.2566, 267.1624, 270.62, 272.8216, 273.2166, 275.2056, 276.2202, 278.3726, 280.3344, 281.9284, 283.9728, 284.1924, 286.4872, 287.587, 289.807, 291.1206, 292.769, 294.8708, 296.665, 297.1182, 299.4012, 300.6352, 302.1354, 304.1756, 306.1606, 307.3462, 308.5214, 309.4134, 310.8352, 313.9684, 315.837, 316.7796, 318.9858),
+    // precision 7
+    Array(92, 93.4934, 94.9758, 96.4574, 97.9718, 99.4954, 101.5302, 103.0756, 104.6374, 106.1782, 107.7888, 109.9522, 111.592, 113.2532, 114.9086, 116.5938, 118.9474, 120.6796, 122.4394, 124.2176, 125.9768, 128.4214, 130.2528, 132.0102, 133.8658, 135.7278, 138.3044, 140.1316, 142.093, 144.0032, 145.9092, 148.6306, 150.5294, 152.5756, 154.6508, 156.662, 159.552, 161.3724, 163.617, 165.5754, 167.7872, 169.8444, 172.7988, 174.8606, 177.2118, 179.3566, 181.4476, 184.5882, 186.6816, 189.0824, 191.0258, 193.6048, 196.4436, 198.7274, 200.957, 203.147, 205.4364, 208.7592, 211.3386, 213.781, 215.8028, 218.656, 221.6544, 223.996, 226.4718, 229.1544, 231.6098, 234.5956, 237.0616, 239.5758, 242.4878, 244.5244, 248.2146, 250.724, 252.8722, 255.5198, 258.0414, 261.941, 264.9048, 266.87, 269.4304, 272.028, 274.4708, 278.37, 281.0624, 283.4668, 286.5532, 289.4352, 293.2564, 295.2744, 298.2118, 300.7472, 304.1456, 307.2928, 309.7504, 312.5528, 315.979, 318.2102, 322.1834, 324.3494, 327.325, 330.6614, 332.903, 337.2544, 339.9042, 343.215, 345.2864, 348.0814, 352.6764, 355.301, 357.139, 360.658, 363.1732, 366.5902, 369.9538, 373.0828, 375.922, 378.9902, 382.7328, 386.4538, 388.1136, 391.2234, 394.0878, 396.708, 401.1556, 404.1852, 406.6372, 409.6822, 412.7796, 416.6078, 418.4916, 422.131, 424.5376, 428.1988, 432.211, 434.4502, 438.5282, 440.912, 444.0448, 447.7432, 450.8524, 453.7988, 456.7858, 458.8868, 463.9886, 466.5064, 468.9124, 472.6616, 475.4682, 478.582, 481.304, 485.2738, 488.6894, 490.329, 496.106, 497.6908, 501.1374, 504.5322, 506.8848, 510.3324, 513.4512, 516.179, 520.4412, 522.6066, 526.167, 528.7794, 533.379, 536.067, 538.46, 542.9116, 545.692, 547.9546, 552.493, 555.2722, 557.335, 562.449, 564.2014, 569.0738, 571.0974, 574.8564, 578.2996, 581.409, 583.9704, 585.8098, 589.6528, 594.5998, 595.958, 600.068, 603.3278, 608.2016, 609.9632, 612.864, 615.43, 620.7794, 621.272, 625.8644, 629.206, 633.219, 634.5154, 638.6102),
+    // precision 8
+    Array(184.2152, 187.2454, 190.2096, 193.6652, 196.6312, 199.6822, 203.249, 206.3296, 210.0038, 213.2074, 216.4612, 220.27, 223.5178, 227.4412, 230.8032, 234.1634, 238.1688, 241.6074, 245.6946, 249.2664, 252.8228, 257.0432, 260.6824, 264.9464, 268.6268, 272.2626, 276.8376, 280.4034, 284.8956, 288.8522, 292.7638, 297.3552, 301.3556, 305.7526, 309.9292, 313.8954, 318.8198, 322.7668, 327.298, 331.6688, 335.9466, 340.9746, 345.1672, 349.3474, 354.3028, 358.8912, 364.114, 368.4646, 372.9744, 378.4092, 382.6022, 387.843, 392.5684, 397.1652, 402.5426, 407.4152, 412.5388, 417.3592, 422.1366, 427.486, 432.3918, 437.5076, 442.509, 447.3834, 453.3498, 458.0668, 463.7346, 469.1228, 473.4528, 479.7, 484.644, 491.0518, 495.5774, 500.9068, 506.432, 512.1666, 517.434, 522.6644, 527.4894, 533.6312, 538.3804, 544.292, 550.5496, 556.0234, 562.8206, 566.6146, 572.4188, 579.117, 583.6762, 590.6576, 595.7864, 601.509, 607.5334, 612.9204, 619.772, 624.2924, 630.8654, 636.1836, 642.745, 649.1316, 655.0386, 660.0136, 666.6342, 671.6196, 678.1866, 684.4282, 689.3324, 695.4794, 702.5038, 708.129, 713.528, 720.3204, 726.463, 732.7928, 739.123, 744.7418, 751.2192, 756.5102, 762.6066, 769.0184, 775.2224, 781.4014, 787.7618, 794.1436, 798.6506, 805.6378, 811.766, 819.7514, 824.5776, 828.7322, 837.8048, 843.6302, 849.9336, 854.4798, 861.3388, 867.9894, 873.8196, 880.3136, 886.2308, 892.4588, 899.0816, 905.4076, 912.0064, 917.3878, 923.619, 929.998, 937.3482, 943.9506, 947.991, 955.1144, 962.203, 968.8222, 975.7324, 981.7826, 988.7666, 994.2648, 1000.3128, 1007.4082, 1013.7536, 1020.3376, 1026.7156, 1031.7478, 1037.4292, 1045.393, 1051.2278, 1058.3434, 1062.8726, 1071.884, 1076.806, 1082.9176, 1089.1678, 1095.5032, 1102.525, 1107.2264, 1115.315, 1120.93, 1127.252, 1134.1496, 1139.0408, 1147.5448, 1153.3296, 1158.1974, 1166.5262, 1174.3328, 1175.657, 1184.4222, 1190.9172, 1197.1292, 1204.4606, 1210.4578, 1218.8728, 1225.3336, 1226.6592, 1236.5768, 1241.363, 1249.4074, 1254.6566, 1260.8014, 1266.5454, 1274.5192),
+    // precision 9
+    Array(369, 374.8294, 381.2452, 387.6698, 394.1464, 400.2024, 406.8782, 413.6598, 420.462, 427.2826, 433.7102, 440.7416, 447.9366, 455.1046, 462.285, 469.0668, 476.306, 483.8448, 491.301, 498.9886, 506.2422, 513.8138, 521.7074, 529.7428, 537.8402, 545.1664, 553.3534, 561.594, 569.6886, 577.7876, 585.65, 594.228, 602.8036, 611.1666, 620.0818, 628.0824, 637.2574, 646.302, 655.1644, 664.0056, 672.3802, 681.7192, 690.5234, 700.2084, 708.831, 718.485, 728.1112, 737.4764, 746.76, 756.3368, 766.5538, 775.5058, 785.2646, 795.5902, 804.3818, 814.8998, 824.9532, 835.2062, 845.2798, 854.4728, 864.9582, 875.3292, 886.171, 896.781, 906.5716, 916.7048, 927.5322, 937.875, 949.3972, 958.3464, 969.7274, 980.2834, 992.1444, 1003.4264, 1013.0166, 1024.018, 1035.0438, 1046.34, 1057.6856, 1068.9836, 1079.0312, 1091.677, 1102.3188, 1113.4846, 1124.4424, 1135.739, 1147.1488, 1158.9202, 1169.406, 1181.5342, 1193.2834, 1203.8954, 1216.3286, 1226.2146, 1239.6684, 1251.9946, 1262.123, 1275.4338, 1285.7378, 1296.076, 1308.9692, 1320.4964, 1333.0998, 1343.9864, 1357.7754, 1368.3208, 1380.4838, 1392.7388, 1406.0758, 1416.9098, 1428.9728, 1440.9228, 1453.9292, 1462.617, 1476.05, 1490.2996, 1500.6128, 1513.7392, 1524.5174, 1536.6322, 1548.2584, 1562.3766, 1572.423, 1587.1232, 1596.5164, 1610.5938, 1622.5972, 1633.1222, 1647.7674, 1658.5044, 1671.57, 1683.7044, 1695.4142, 1708.7102, 1720.6094, 1732.6522, 1747.841, 1756.4072, 1769.9786, 1782.3276, 1797.5216, 1808.3186, 1819.0694, 1834.354, 1844.575, 1856.2808, 1871.1288, 1880.7852, 1893.9622, 1906.3418, 1920.6548, 1932.9302, 1945.8584, 1955.473, 1968.8248, 1980.6446, 1995.9598, 2008.349, 2019.8556, 2033.0334, 2044.0206, 2059.3956, 2069.9174, 2082.6084, 2093.7036, 2106.6108, 2118.9124, 2132.301, 2144.7628, 2159.8422, 2171.0212, 2183.101, 2193.5112, 2208.052, 2221.3194, 2233.3282, 2247.295, 2257.7222, 2273.342, 2286.5638, 2299.6786, 2310.8114, 2322.3312, 2335.516, 2349.874, 2363.5968, 2373.865, 2387.1918, 2401.8328, 2414.8496, 2424.544, 2436.7592, 2447.1682, 2464.1958, 2474.3438, 2489.0006, 2497.4526, 2513.6586, 2527.19, 2540.7028, 2553.768),
+    // precision 10
+    Array(738.1256, 750.4234, 763.1064, 775.4732, 788.4636, 801.0644, 814.488, 827.9654, 841.0832, 854.7864, 868.1992, 882.2176, 896.5228, 910.1716, 924.7752, 938.899, 953.6126, 968.6492, 982.9474, 998.5214, 1013.1064, 1028.6364, 1044.2468, 1059.4588, 1075.3832, 1091.0584, 1106.8606, 1123.3868, 1139.5062, 1156.1862, 1172.463, 1189.339, 1206.1936, 1223.1292, 1240.1854, 1257.2908, 1275.3324, 1292.8518, 1310.5204, 1328.4854, 1345.9318, 1364.552, 1381.4658, 1400.4256, 1419.849, 1438.152, 1456.8956, 1474.8792, 1494.118, 1513.62, 1532.5132, 1551.9322, 1570.7726, 1590.6086, 1610.5332, 1630.5918, 1650.4294, 1669.7662, 1690.4106, 1710.7338, 1730.9012, 1750.4486, 1770.1556, 1791.6338, 1812.7312, 1833.6264, 1853.9526, 1874.8742, 1896.8326, 1918.1966, 1939.5594, 1961.07, 1983.037, 2003.1804, 2026.071, 2047.4884, 2070.0848, 2091.2944, 2114.333, 2135.9626, 2158.2902, 2181.0814, 2202.0334, 2224.4832, 2246.39, 2269.7202, 2292.1714, 2314.2358, 2338.9346, 2360.891, 2384.0264, 2408.3834, 2430.1544, 2454.8684, 2476.9896, 2501.4368, 2522.8702, 2548.0408, 2570.6738, 2593.5208, 2617.0158, 2640.2302, 2664.0962, 2687.4986, 2714.2588, 2735.3914, 2759.6244, 2781.8378, 2808.0072, 2830.6516, 2856.2454, 2877.2136, 2903.4546, 2926.785, 2951.2294, 2976.468, 3000.867, 3023.6508, 3049.91, 3073.5984, 3098.162, 3121.5564, 3146.2328, 3170.9484, 3195.5902, 3221.3346, 3242.7032, 3271.6112, 3296.5546, 3317.7376, 3345.072, 3369.9518, 3394.326, 3418.1818, 3444.6926, 3469.086, 3494.2754, 3517.8698, 3544.248, 3565.3768, 3588.7234, 3616.979, 3643.7504, 3668.6812, 3695.72, 3719.7392, 3742.6224, 3770.4456, 3795.6602, 3819.9058, 3844.002, 3869.517, 3895.6824, 3920.8622, 3947.1364, 3973.985, 3995.4772, 4021.62, 4046.628, 4074.65, 4096.2256, 4121.831, 4146.6406, 4173.276, 4195.0744, 4223.9696, 4251.3708, 4272.9966, 4300.8046, 4326.302, 4353.1248, 4374.312, 4403.0322, 4426.819, 4450.0598, 4478.5206, 4504.8116, 4528.8928, 4553.9584, 4578.8712, 4603.8384, 4632.3872, 4655.5128, 4675.821, 4704.6222, 4731.9862, 4755.4174, 4781.2628, 4804.332, 4832.3048, 4862.8752, 4883.4148, 4906.9544, 4935.3516, 4954.3532, 4984.0248, 5011.217, 5035.3258, 5057.3672, 5084.1828),
+    // precision 11
+    Array(1477, 1501.6014, 1526.5802, 1551.7942, 1577.3042, 1603.2062, 1629.8402, 1656.2292, 1682.9462, 1709.9926, 1737.3026, 1765.4252, 1793.0578, 1821.6092, 1849.626, 1878.5568, 1908.527, 1937.5154, 1967.1874, 1997.3878, 2027.37, 2058.1972, 2089.5728, 2120.1012, 2151.9668, 2183.292, 2216.0772, 2247.8578, 2280.6562, 2313.041, 2345.714, 2380.3112, 2414.1806, 2447.9854, 2481.656, 2516.346, 2551.5154, 2586.8378, 2621.7448, 2656.6722, 2693.5722, 2729.1462, 2765.4124, 2802.8728, 2838.898, 2876.408, 2913.4926, 2951.4938, 2989.6776, 3026.282, 3065.7704, 3104.1012, 3143.7388, 3181.6876, 3221.1872, 3261.5048, 3300.0214, 3339.806, 3381.409, 3421.4144, 3461.4294, 3502.2286, 3544.651, 3586.6156, 3627.337, 3670.083, 3711.1538, 3753.5094, 3797.01, 3838.6686, 3882.1678, 3922.8116, 3967.9978, 4009.9204, 4054.3286, 4097.5706, 4140.6014, 4185.544, 4229.5976, 4274.583, 4316.9438, 4361.672, 4406.2786, 4451.8628, 4496.1834, 4543.505, 4589.1816, 4632.5188, 4678.2294, 4724.8908, 4769.0194, 4817.052, 4861.4588, 4910.1596, 4956.4344, 5002.5238, 5048.13, 5093.6374, 5142.8162, 5187.7894, 5237.3984, 5285.6078, 5331.0858, 5379.1036, 5428.6258, 5474.6018, 5522.7618, 5571.5822, 5618.59, 5667.9992, 5714.88, 5763.454, 5808.6982, 5860.3644, 5910.2914, 5953.571, 6005.9232, 6055.1914, 6104.5882, 6154.5702, 6199.7036, 6251.1764, 6298.7596, 6350.0302, 6398.061, 6448.4694, 6495.933, 6548.0474, 6597.7166, 6646.9416, 6695.9208, 6742.6328, 6793.5276, 6842.1934, 6894.2372, 6945.3864, 6996.9228, 7044.2372, 7094.1374, 7142.2272, 7192.2942, 7238.8338, 7288.9006, 7344.0908, 7394.8544, 7443.5176, 7490.4148, 7542.9314, 7595.6738, 7641.9878, 7694.3688, 7743.0448, 7797.522, 7845.53, 7899.594, 7950.3132, 7996.455, 8050.9442, 8092.9114, 8153.1374, 8197.4472, 8252.8278, 8301.8728, 8348.6776, 8401.4698, 8453.551, 8504.6598, 8553.8944, 8604.1276, 8657.6514, 8710.3062, 8758.908, 8807.8706, 8862.1702, 8910.4668, 8960.77, 9007.2766, 9063.164, 9121.0534, 9164.1354, 9218.1594, 9267.767, 9319.0594, 9372.155, 9419.7126, 9474.3722, 9520.1338, 9572.368, 9622.7702, 9675.8448, 9726.5396, 9778.7378, 9827.6554, 9878.1922, 9928.7782, 9978.3984, 10026.578, 10076.5626, 10137.1618, 10177.5244, 10229.9176),
+    // precision 12
+    Array(2954, 3003.4782, 3053.3568, 3104.3666, 3155.324, 3206.9598, 3259.648, 3312.539, 3366.1474, 3420.2576, 3474.8376, 3530.6076, 3586.451, 3643.38, 3700.4104, 3757.5638, 3815.9676, 3875.193, 3934.838, 3994.8548, 4055.018, 4117.1742, 4178.4482, 4241.1294, 4304.4776, 4367.4044, 4431.8724, 4496.3732, 4561.4304, 4627.5326, 4693.949, 4761.5532, 4828.7256, 4897.6182, 4965.5186, 5034.4528, 5104.865, 5174.7164, 5244.6828, 5316.6708, 5387.8312, 5459.9036, 5532.476, 5604.8652, 5679.6718, 5753.757, 5830.2072, 5905.2828, 5980.0434, 6056.6264, 6134.3192, 6211.5746, 6290.0816, 6367.1176, 6447.9796, 6526.5576, 6606.1858, 6686.9144, 6766.1142, 6847.0818, 6927.9664, 7010.9096, 7091.0816, 7175.3962, 7260.3454, 7344.018, 7426.4214, 7511.3106, 7596.0686, 7679.8094, 7765.818, 7852.4248, 7936.834, 8022.363, 8109.5066, 8200.4554, 8288.5832, 8373.366, 8463.4808, 8549.7682, 8642.0522, 8728.3288, 8820.9528, 8907.727, 9001.0794, 9091.2522, 9179.988, 9269.852, 9362.6394, 9453.642, 9546.9024, 9640.6616, 9732.6622, 9824.3254, 9917.7484, 10007.9392, 10106.7508, 10196.2152, 10289.8114, 10383.5494, 10482.3064, 10576.8734, 10668.7872, 10764.7156, 10862.0196, 10952.793, 11049.9748, 11146.0702, 11241.4492, 11339.2772, 11434.2336, 11530.741, 11627.6136, 11726.311, 11821.5964, 11918.837, 12015.3724, 12113.0162, 12213.0424, 12306.9804, 12408.4518, 12504.8968, 12604.586, 12700.9332, 12798.705, 12898.5142, 12997.0488, 13094.788, 13198.475, 13292.7764, 13392.9698, 13486.8574, 13590.1616, 13686.5838, 13783.6264, 13887.2638, 13992.0978, 14081.0844, 14189.9956, 14280.0912, 14382.4956, 14486.4384, 14588.1082, 14686.2392, 14782.276, 14888.0284, 14985.1864, 15088.8596, 15187.0998, 15285.027, 15383.6694, 15495.8266, 15591.3736, 15694.2008, 15790.3246, 15898.4116, 15997.4522, 16095.5014, 16198.8514, 16291.7492, 16402.6424, 16499.1266, 16606.2436, 16697.7186, 16796.3946, 16902.3376, 17005.7672, 17100.814, 17206.8282, 17305.8262, 17416.0744, 17508.4092, 17617.0178, 17715.4554, 17816.758, 17920.1748, 18012.9236, 18119.7984, 18223.2248, 18324.2482, 18426.6276, 18525.0932, 18629.8976, 18733.2588, 18831.0466, 18940.1366, 19032.2696, 19131.729, 19243.4864, 19349.6932, 19442.866, 19547.9448, 19653.2798, 19754.4034, 19854.0692, 19965.1224, 20065.1774, 20158.2212, 20253.353, 20366.3264, 20463.22),
+    // precision 13
+    Array(5908.5052, 6007.2672, 6107.347, 6208.5794, 6311.2622, 6414.5514, 6519.3376, 6625.6952, 6732.5988, 6841.3552, 6950.5972, 7061.3082, 7173.5646, 7287.109, 7401.8216, 7516.4344, 7633.3802, 7751.2962, 7870.3784, 7990.292, 8110.79, 8233.4574, 8356.6036, 8482.2712, 8607.7708, 8735.099, 8863.1858, 8993.4746, 9123.8496, 9255.6794, 9388.5448, 9522.7516, 9657.3106, 9792.6094, 9930.5642, 10068.794, 10206.7256, 10347.81, 10490.3196, 10632.0778, 10775.9916, 10920.4662, 11066.124, 11213.073, 11358.0362, 11508.1006, 11659.1716, 11808.7514, 11959.4884, 12112.1314, 12265.037, 12420.3756, 12578.933, 12734.311, 12890.0006, 13047.2144, 13207.3096, 13368.5144, 13528.024, 13689.847, 13852.7528, 14018.3168, 14180.5372, 14346.9668, 14513.5074, 14677.867, 14846.2186, 15017.4186, 15184.9716, 15356.339, 15529.2972, 15697.3578, 15871.8686, 16042.187, 16216.4094, 16389.4188, 16565.9126, 16742.3272, 16919.0042, 17094.7592, 17273.965, 17451.8342, 17634.4254, 17810.5984, 17988.9242, 18171.051, 18354.7938, 18539.466, 18721.0408, 18904.9972, 19081.867, 19271.9118, 19451.8694, 19637.9816, 19821.2922, 20013.1292, 20199.3858, 20387.8726, 20572.9514, 20770.7764, 20955.1714, 21144.751, 21329.9952, 21520.709, 21712.7016, 21906.3868, 22096.2626, 22286.0524, 22475.051, 22665.5098, 22862.8492, 23055.5294, 23249.6138, 23437.848, 23636.273, 23826.093, 24020.3296, 24213.3896, 24411.7392, 24602.9614, 24805.7952, 24998.1552, 25193.9588, 25389.0166, 25585.8392, 25780.6976, 25981.2728, 26175.977, 26376.5252, 26570.1964, 26773.387, 26962.9812, 27163.0586, 27368.164, 27565.0534, 27758.7428, 27961.1276, 28163.2324, 28362.3816, 28565.7668, 28758.644, 28956.9768, 29163.4722, 29354.7026, 29561.1186, 29767.9948, 29959.9986, 30164.0492, 30366.9818, 30562.5338, 30762.9928, 30976.1592, 31166.274, 31376.722, 31570.3734, 31770.809, 31974.8934, 32179.5286, 32387.5442, 32582.3504, 32794.076, 32989.9528, 33191.842, 33392.4684, 33595.659, 33801.8672, 34000.3414, 34200.0922, 34402.6792, 34610.0638, 34804.0084, 35011.13, 35218.669, 35418.6634, 35619.0792, 35830.6534, 36028.4966, 36229.7902, 36438.6422, 36630.7764, 36833.3102, 37048.6728, 37247.3916, 37453.5904, 37669.3614, 37854.5526, 38059.305, 38268.0936, 38470.2516, 38674.7064, 38876.167, 39068.3794, 39281.9144, 39492.8566, 39684.8628, 39898.4108, 40093.1836, 40297.6858, 40489.7086, 40717.2424),
+    // precision 14
+    Array(11817.475, 12015.0046, 12215.3792, 12417.7504, 12623.1814, 12830.0086, 13040.0072, 13252.503, 13466.178, 13683.2738, 13902.0344, 14123.9798, 14347.394, 14573.7784, 14802.6894, 15033.6824, 15266.9134, 15502.8624, 15741.4944, 15980.7956, 16223.8916, 16468.6316, 16715.733, 16965.5726, 17217.204, 17470.666, 17727.8516, 17986.7886, 18247.6902, 18510.9632, 18775.304, 19044.7486, 19314.4408, 19587.202, 19862.2576, 20135.924, 20417.0324, 20697.9788, 20979.6112, 21265.0274, 21550.723, 21841.6906, 22132.162, 22428.1406, 22722.127, 23020.5606, 23319.7394, 23620.4014, 23925.2728, 24226.9224, 24535.581, 24845.505, 25155.9618, 25470.3828, 25785.9702, 26103.7764, 26420.4132, 26742.0186, 27062.8852, 27388.415, 27714.6024, 28042.296, 28365.4494, 28701.1526, 29031.8008, 29364.2156, 29704.497, 30037.1458, 30380.111, 30723.8168, 31059.5114, 31404.9498, 31751.6752, 32095.2686, 32444.7792, 32794.767, 33145.204, 33498.4226, 33847.6502, 34209.006, 34560.849, 34919.4838, 35274.9778, 35635.1322, 35996.3266, 36359.1394, 36722.8266, 37082.8516, 37447.7354, 37815.9606, 38191.0692, 38559.4106, 38924.8112, 39294.6726, 39663.973, 40042.261, 40416.2036, 40779.2036, 41161.6436, 41540.9014, 41921.1998, 42294.7698, 42678.5264, 43061.3464, 43432.375, 43818.432, 44198.6598, 44583.0138, 44970.4794, 45353.924, 45729.858, 46118.2224, 46511.5724, 46900.7386, 47280.6964, 47668.1472, 48055.6796, 48446.9436, 48838.7146, 49217.7296, 49613.7796, 50010.7508, 50410.0208, 50793.7886, 51190.2456, 51583.1882, 51971.0796, 52376.5338, 52763.319, 53165.5534, 53556.5594, 53948.2702, 54346.352, 54748.7914, 55138.577, 55543.4824, 55941.1748, 56333.7746, 56745.1552, 57142.7944, 57545.2236, 57935.9956, 58348.5268, 58737.5474, 59158.5962, 59542.6896, 59958.8004, 60349.3788, 60755.0212, 61147.6144, 61548.194, 61946.0696, 62348.6042, 62763.603, 63162.781, 63560.635, 63974.3482, 64366.4908, 64771.5876, 65176.7346, 65597.3916, 65995.915, 66394.0384, 66822.9396, 67203.6336, 67612.2032, 68019.0078, 68420.0388, 68821.22, 69235.8388, 69640.0724, 70055.155, 70466.357, 70863.4266, 71276.2482, 71677.0306, 72080.2006, 72493.0214, 72893.5952, 73314.5856, 73714.9852, 74125.3022, 74521.2122, 74933.6814, 75341.5904, 75743.0244, 76166.0278, 76572.1322, 76973.1028, 77381.6284, 77800.6092, 78189.328, 78607.0962, 79012.2508, 79407.8358, 79825.725, 80238.701, 80646.891, 81035.6436, 81460.0448, 81876.3884),
+    // precision 15
+    Array(23635.0036, 24030.8034, 24431.4744, 24837.1524, 25246.7928, 25661.326, 26081.3532, 26505.2806, 26933.9892, 27367.7098, 27805.318, 28248.799, 28696.4382, 29148.8244, 29605.5138, 30066.8668, 30534.2344, 31006.32, 31480.778, 31962.2418, 32447.3324, 32938.0232, 33432.731, 33930.728, 34433.9896, 34944.1402, 35457.5588, 35974.5958, 36497.3296, 37021.9096, 37554.326, 38088.0826, 38628.8816, 39171.3192, 39723.2326, 40274.5554, 40832.3142, 41390.613, 41959.5908, 42532.5466, 43102.0344, 43683.5072, 44266.694, 44851.2822, 45440.7862, 46038.0586, 46640.3164, 47241.064, 47846.155, 48454.7396, 49076.9168, 49692.542, 50317.4778, 50939.65, 51572.5596, 52210.2906, 52843.7396, 53481.3996, 54127.236, 54770.406, 55422.6598, 56078.7958, 56736.7174, 57397.6784, 58064.5784, 58730.308, 59404.9784, 60077.0864, 60751.9158, 61444.1386, 62115.817, 62808.7742, 63501.4774, 64187.5454, 64883.6622, 65582.7468, 66274.5318, 66976.9276, 67688.7764, 68402.138, 69109.6274, 69822.9706, 70543.6108, 71265.5202, 71983.3848, 72708.4656, 73433.384, 74158.4664, 74896.4868, 75620.9564, 76362.1434, 77098.3204, 77835.7662, 78582.6114, 79323.9902, 80067.8658, 80814.9246, 81567.0136, 82310.8536, 83061.9952, 83821.4096, 84580.8608, 85335.547, 86092.5802, 86851.6506, 87612.311, 88381.2016, 89146.3296, 89907.8974, 90676.846, 91451.4152, 92224.5518, 92995.8686, 93763.5066, 94551.2796, 95315.1944, 96096.1806, 96881.0918, 97665.679, 98442.68, 99229.3002, 100011.0994, 100790.6386, 101580.1564, 102377.7484, 103152.1392, 103944.2712, 104730.216, 105528.6336, 106324.9398, 107117.6706, 107890.3988, 108695.2266, 109485.238, 110294.7876, 111075.0958, 111878.0496, 112695.2864, 113464.5486, 114270.0474, 115068.608, 115884.3626, 116673.2588, 117483.3716, 118275.097, 119085.4092, 119879.2808, 120687.5868, 121499.9944, 122284.916, 123095.9254, 123912.5038, 124709.0454, 125503.7182, 126323.259, 127138.9412, 127943.8294, 128755.646, 129556.5354, 130375.3298, 131161.4734, 131971.1962, 132787.5458, 133588.1056, 134431.351, 135220.2906, 136023.398, 136846.6558, 137667.0004, 138463.663, 139283.7154, 140074.6146, 140901.3072, 141721.8548, 142543.2322, 143356.1096, 144173.7412, 144973.0948, 145794.3162, 146609.5714, 147420.003, 148237.9784, 149050.5696, 149854.761, 150663.1966, 151494.0754, 152313.1416, 153112.6902, 153935.7206, 154746.9262, 155559.547, 156401.9746, 157228.7036, 158008.7254, 158820.75, 159646.9184, 160470.4458, 161279.5348, 162093.3114, 162918.542, 163729.2842),
+    // precision 16
+    Array(47271, 48062.3584, 48862.7074, 49673.152, 50492.8416, 51322.9514, 52161.03, 53009.407, 53867.6348, 54734.206, 55610.5144, 56496.2096, 57390.795, 58297.268, 59210.6448, 60134.665, 61068.0248, 62010.4472, 62962.5204, 63923.5742, 64895.0194, 65876.4182, 66862.6136, 67862.6968, 68868.8908, 69882.8544, 70911.271, 71944.0924, 72990.0326, 74040.692, 75100.6336, 76174.7826, 77252.5998, 78340.2974, 79438.2572, 80545.4976, 81657.2796, 82784.6336, 83915.515, 85059.7362, 86205.9368, 87364.4424, 88530.3358, 89707.3744, 90885.9638, 92080.197, 93275.5738, 94479.391, 95695.918, 96919.2236, 98148.4602, 99382.3474, 100625.6974, 101878.0284, 103141.6278, 104409.4588, 105686.2882, 106967.5402, 108261.6032, 109548.1578, 110852.0728, 112162.231, 113479.0072, 114806.2626, 116137.9072, 117469.5048, 118813.5186, 120165.4876, 121516.2556, 122875.766, 124250.5444, 125621.2222, 127003.2352, 128387.848, 129775.2644, 131181.7776, 132577.3086, 133979.9458, 135394.1132, 136800.9078, 138233.217, 139668.5308, 141085.212, 142535.2122, 143969.0684, 145420.2872, 146878.1542, 148332.7572, 149800.3202, 151269.66, 152743.6104, 154213.0948, 155690.288, 157169.4246, 158672.1756, 160160.059, 161650.6854, 163145.7772, 164645.6726, 166159.1952, 167682.1578, 169177.3328, 170700.0118, 172228.8964, 173732.6664, 175265.5556, 176787.799, 178317.111, 179856.6914, 181400.865, 182943.4612, 184486.742, 186033.4698, 187583.7886, 189148.1868, 190688.4526, 192250.1926, 193810.9042, 195354.2972, 196938.7682, 198493.5898, 200079.2824, 201618.912, 203205.5492, 204765.5798, 206356.1124, 207929.3064, 209498.7196, 211086.229, 212675.1324, 214256.7892, 215826.2392, 217412.8474, 218995.6724, 220618.6038, 222207.1166, 223781.0364, 225387.4332, 227005.7928, 228590.4336, 230217.8738, 231805.1054, 233408.9, 234995.3432, 236601.4956, 238190.7904, 239817.2548, 241411.2832, 243002.4066, 244640.1884, 246255.3128, 247849.3508, 249479.9734, 251106.8822, 252705.027, 254332.9242, 255935.129, 257526.9014, 259154.772, 260777.625, 262390.253, 264004.4906, 265643.59, 267255.4076, 268873.426, 270470.7252, 272106.4804, 273722.4456, 275337.794, 276945.7038, 278592.9154, 280204.3726, 281841.1606, 283489.171, 285130.1716, 286735.3362, 288364.7164, 289961.1814, 291595.5524, 293285.683, 294899.6668, 296499.3434, 298128.0462, 299761.8946, 301394.2424, 302997.6748, 304615.1478, 306269.7724, 307886.114, 309543.1028, 311153.2862, 312782.8546, 314421.2008, 316033.2438, 317692.9636, 319305.2648, 320948.7406, 322566.3364, 324228.4224, 325847.1542),
+    // precision 17
+    Array(94542, 96125.811, 97728.019, 99348.558, 100987.9705, 102646.7565, 104324.5125, 106021.7435, 107736.7865, 109469.272, 111223.9465, 112995.219, 114787.432, 116593.152, 118422.71, 120267.2345, 122134.6765, 124020.937, 125927.2705, 127851.255, 129788.9485, 131751.016, 133726.8225, 135722.592, 137736.789, 139770.568, 141821.518, 143891.343, 145982.1415, 148095.387, 150207.526, 152355.649, 154515.6415, 156696.05, 158887.7575, 161098.159, 163329.852, 165569.053, 167837.4005, 170121.6165, 172420.4595, 174732.6265, 177062.77, 179412.502, 181774.035, 184151.939, 186551.6895, 188965.691, 191402.8095, 193857.949, 196305.0775, 198774.6715, 201271.2585, 203764.78, 206299.3695, 208818.1365, 211373.115, 213946.7465, 216532.076, 219105.541, 221714.5375, 224337.5135, 226977.5125, 229613.0655, 232270.2685, 234952.2065, 237645.3555, 240331.1925, 243034.517, 245756.0725, 248517.6865, 251232.737, 254011.3955, 256785.995, 259556.44, 262368.335, 265156.911, 267965.266, 270785.583, 273616.0495, 276487.4835, 279346.639, 282202.509, 285074.3885, 287942.2855, 290856.018, 293774.0345, 296678.5145, 299603.6355, 302552.6575, 305492.9785, 308466.8605, 311392.581, 314347.538, 317319.4295, 320285.9785, 323301.7325, 326298.3235, 329301.3105, 332301.987, 335309.791, 338370.762, 341382.923, 344431.1265, 347464.1545, 350507.28, 353619.2345, 356631.2005, 359685.203, 362776.7845, 365886.488, 368958.2255, 372060.6825, 375165.4335, 378237.935, 381328.311, 384430.5225, 387576.425, 390683.242, 393839.648, 396977.8425, 400101.9805, 403271.296, 406409.8425, 409529.5485, 412678.7, 415847.423, 419020.8035, 422157.081, 425337.749, 428479.6165, 431700.902, 434893.1915, 438049.582, 441210.5415, 444379.2545, 447577.356, 450741.931, 453959.548, 457137.0935, 460329.846, 463537.4815, 466732.3345, 469960.5615, 473164.681, 476347.6345, 479496.173, 482813.1645, 486025.6995, 489249.4885, 492460.1945, 495675.8805, 498908.0075, 502131.802, 505374.3855, 508550.9915, 511806.7305, 515026.776, 518217.0005, 521523.9855, 524705.9855, 527950.997, 531210.0265, 534472.497, 537750.7315, 540926.922, 544207.094, 547429.4345, 550666.3745, 553975.3475, 557150.7185, 560399.6165, 563662.697, 566916.7395, 570146.1215, 573447.425, 576689.6245, 579874.5745, 583202.337, 586503.0255, 589715.635, 592910.161, 596214.3885, 599488.035, 602740.92, 605983.0685, 609248.67, 612491.3605, 615787.912, 619107.5245, 622307.9555, 625577.333, 628840.4385, 632085.2155, 635317.6135, 638691.7195, 641887.467, 645139.9405, 648441.546, 651666.252, 654941.845),
+    // precision 18
+    Array(189084, 192250.913, 195456.774, 198696.946, 201977.762, 205294.444, 208651.754, 212042.099, 215472.269, 218941.91, 222443.912, 225996.845, 229568.199, 233193.568, 236844.457, 240543.233, 244279.475, 248044.27, 251854.588, 255693.2, 259583.619, 263494.621, 267445.385, 271454.061, 275468.769, 279549.456, 283646.446, 287788.198, 291966.099, 296181.164, 300431.469, 304718.618, 309024.004, 313393.508, 317760.803, 322209.731, 326675.061, 331160.627, 335654.47, 340241.442, 344841.833, 349467.132, 354130.629, 358819.432, 363574.626, 368296.587, 373118.482, 377914.93, 382782.301, 387680.669, 392601.981, 397544.323, 402529.115, 407546.018, 412593.658, 417638.657, 422762.865, 427886.169, 433017.167, 438213.273, 443441.254, 448692.421, 453937.533, 459239.049, 464529.569, 469910.083, 475274.03, 480684.473, 486070.26, 491515.237, 496995.651, 502476.617, 507973.609, 513497.19, 519083.233, 524726.509, 530305.505, 535945.728, 541584.404, 547274.055, 552967.236, 558667.862, 564360.216, 570128.148, 575965.08, 581701.952, 587532.523, 593361.144, 599246.128, 605033.418, 610958.779, 616837.117, 622772.818, 628672.04, 634675.369, 640574.831, 646585.739, 652574.547, 658611.217, 664642.684, 670713.914, 676737.681, 682797.313, 688837.897, 694917.874, 701009.882, 707173.648, 713257.254, 719415.392, 725636.761, 731710.697, 737906.209, 744103.074, 750313.39, 756504.185, 762712.579, 768876.985, 775167.859, 781359, 787615.959, 793863.597, 800245.477, 806464.582, 812785.294, 819005.925, 825403.057, 831676.197, 837936.284, 844266.968, 850642.711, 856959.756, 863322.774, 869699.931, 876102.478, 882355.787, 888694.463, 895159.952, 901536.143, 907872.631, 914293.672, 920615.14, 927130.974, 933409.404, 939922.178, 946331.47, 952745.93, 959209.264, 965590.224, 972077.284, 978501.961, 984953.19, 991413.271, 997817.479, 1004222.658, 1010725.676, 1017177.138, 1023612.529, 1030098.236, 1036493.719, 1043112.207, 1049537.036, 1056008.096, 1062476.184, 1068942.337, 1075524.95, 1081932.864, 1088426.025, 1094776.005, 1101327.448, 1107901.673, 1114423.639, 1120884.602, 1127324.923, 1133794.24, 1140328.886, 1146849.376, 1153346.682, 1159836.502, 1166478.703, 1172953.304, 1179391.502, 1185950.982, 1192544.052, 1198913.41, 1205430.994, 1212015.525, 1218674.042, 1225121.683, 1231551.101, 1238126.379, 1244673.795, 1251260.649, 1257697.86, 1264320.983, 1270736.319, 1277274.694, 1283804.95, 1290211.514, 1296858.568, 1303455.691)
+  )
+
+  /**
+   * Bias corrections given a precision and the index of the raw estimate table.
+   */
+  val BIAS_DATA = Array(
+    // precision 4
+    Array(10, 9.717, 9.207, 8.7896, 8.2882, 7.8204, 7.3772, 6.9342, 6.5202, 6.161, 5.7722, 5.4636, 5.0396, 4.6766, 4.3566, 4.0454, 3.7936, 3.4856, 3.2666, 2.9946, 2.766, 2.4692, 2.3638, 2.0764, 1.7864, 1.7602, 1.4814, 1.433, 1.2926, 1.0664, 0.999600000000001, 0.7956, 0.5366, 0.589399999999998, 0.573799999999999, 0.269799999999996, 0.368200000000002, 0.0544000000000011, 0.234200000000001, 0.0108000000000033, -0.203400000000002, -0.0701999999999998, -0.129600000000003, -0.364199999999997, -0.480600000000003, -0.226999999999997, -0.322800000000001, -0.382599999999996, -0.511200000000002, -0.669600000000003, -0.749400000000001, -0.500399999999999, -0.617600000000003, -0.6922, -0.601599999999998, -0.416200000000003, -0.338200000000001, -0.782600000000002, -0.648600000000002, -0.919800000000002, -0.851799999999997, -0.962400000000002, -0.6402, -1.1922, -1.0256, -1.086, -1.21899999999999, -0.819400000000002, -0.940600000000003, -1.1554, -1.2072, -1.1752, -1.16759999999999, -1.14019999999999, -1.3754, -1.29859999999999, -1.607, -1.3292, -1.7606),
+    // precision 5
+    Array(22, 21.1194, 20.8208, 20.2318, 19.77, 19.2436, 18.7774, 18.2848, 17.8224, 17.3742, 16.9336, 16.503, 16.0494, 15.6292, 15.2124, 14.798, 14.367, 13.9728, 13.5944, 13.217, 12.8438, 12.3696, 12.0956, 11.7044, 11.324, 11.0668, 10.6698, 10.3644, 10.049, 9.6918, 9.4146, 9.082, 8.687, 8.5398, 8.2462, 7.857, 7.6606, 7.4168, 7.1248, 6.9222, 6.6804, 6.447, 6.3454, 5.9594, 5.7636, 5.5776, 5.331, 5.19, 4.9676, 4.7564, 4.5314, 4.4442, 4.3708, 3.9774, 3.9624, 3.8796, 3.755, 3.472, 3.2076, 3.1024, 2.8908, 2.7338, 2.7728, 2.629, 2.413, 2.3266, 2.1524, 2.2642, 2.1806, 2.0566, 1.9192, 1.7598, 1.3516, 1.5802, 1.43859999999999, 1.49160000000001, 1.1524, 1.1892, 0.841399999999993, 0.879800000000003, 0.837599999999995, 0.469800000000006, 0.765600000000006, 0.331000000000003, 0.591399999999993, 0.601200000000006, 0.701599999999999, 0.558199999999999, 0.339399999999998, 0.354399999999998, 0.491200000000006, 0.308000000000007, 0.355199999999996, -0.0254000000000048, 0.205200000000005, -0.272999999999996, 0.132199999999997, 0.394400000000005, -0.241200000000006, 0.242000000000004, 0.191400000000002, 0.253799999999998, -0.122399999999999, -0.370800000000003, 0.193200000000004, -0.0848000000000013, 0.0867999999999967, -0.327200000000005, -0.285600000000002, 0.311400000000006, -0.128399999999999, -0.754999999999995, -0.209199999999996, -0.293599999999998, -0.364000000000004, -0.253600000000006, -0.821200000000005, -0.253600000000006, -0.510400000000004, -0.383399999999995, -0.491799999999998, -0.220200000000006, -0.0972000000000008, -0.557400000000001, -0.114599999999996, -0.295000000000002, -0.534800000000004, 0.346399999999988, -0.65379999999999, 0.0398000000000138, 0.0341999999999985, -0.995800000000003, -0.523400000000009, -0.489000000000004, -0.274799999999999, -0.574999999999989, -0.482799999999997, 0.0571999999999946, -0.330600000000004, -0.628800000000012, -0.140199999999993, -0.540600000000012, -0.445999999999998, -0.599400000000003, -0.262599999999992, 0.163399999999996, -0.100599999999986, -0.39500000000001, -1.06960000000001, -0.836399999999998, -0.753199999999993, -0.412399999999991, -0.790400000000005, -0.29679999999999, -0.28540000000001, -0.193000000000012, -0.0772000000000048, -0.962799999999987, -0.414800000000014),
+    // precision 6
+    Array(45, 44.1902, 43.271, 42.8358, 41.8142, 41.2854, 40.317, 39.354, 38.8924, 37.9436, 37.4596, 36.5262, 35.6248, 35.1574, 34.2822, 33.837, 32.9636, 32.074, 31.7042, 30.7976, 30.4772, 29.6564, 28.7942, 28.5004, 27.686, 27.291, 26.5672, 25.8556, 25.4982, 24.8204, 24.4252, 23.7744, 23.0786, 22.8344, 22.0294, 21.8098, 21.0794, 20.5732, 20.1878, 19.5648, 19.2902, 18.6784, 18.3352, 17.8946, 17.3712, 17.0852, 16.499, 16.2686, 15.6844, 15.2234, 14.9732, 14.3356, 14.2286, 13.7262, 13.3284, 13.1048, 12.5962, 12.3562, 12.1272, 11.4184, 11.4974, 11.0822, 10.856, 10.48, 10.2834, 10.0208, 9.637, 9.51739999999999, 9.05759999999999, 8.74760000000001, 8.42700000000001, 8.1326, 8.2372, 8.2788, 7.6776, 7.79259999999999, 7.1952, 6.9564, 6.6454, 6.87, 6.5428, 6.19999999999999, 6.02940000000001, 5.62780000000001, 5.6782, 5.792, 5.35159999999999, 5.28319999999999, 5.0394, 5.07480000000001, 4.49119999999999, 4.84899999999999, 4.696, 4.54040000000001, 4.07300000000001, 4.37139999999999, 3.7216, 3.7328, 3.42080000000001, 3.41839999999999, 3.94239999999999, 3.27719999999999, 3.411, 3.13079999999999, 2.76900000000001, 2.92580000000001, 2.68279999999999, 2.75020000000001, 2.70599999999999, 2.3886, 3.01859999999999, 2.45179999999999, 2.92699999999999, 2.41720000000001, 2.41139999999999, 2.03299999999999, 2.51240000000001, 2.5564, 2.60079999999999, 2.41720000000001, 1.80439999999999, 1.99700000000001, 2.45480000000001, 1.8948, 2.2346, 2.30860000000001, 2.15479999999999, 1.88419999999999, 1.6508, 0.677199999999999, 1.72540000000001, 1.4752, 1.72280000000001, 1.66139999999999, 1.16759999999999, 1.79300000000001, 1.00059999999999, 0.905200000000008, 0.659999999999997, 1.55879999999999, 1.1636, 0.688199999999995, 0.712600000000009, 0.450199999999995, 1.1978, 0.975599999999986, 0.165400000000005, 1.727, 1.19739999999999, -0.252600000000001, 1.13460000000001, 1.3048, 1.19479999999999, 0.313400000000001, 0.878999999999991, 1.12039999999999, 0.853000000000009, 1.67920000000001, 0.856999999999999, 0.448599999999999, 1.2362, 0.953399999999988, 1.02859999999998, 0.563199999999995, 0.663000000000011, 0.723000000000013, 0.756599999999992, 0.256599999999992, -0.837600000000009, 0.620000000000005, 0.821599999999989, 0.216600000000028, 0.205600000000004, 0.220199999999977, 0.372599999999977, 0.334400000000016, 0.928400000000011, 0.972800000000007, 0.192400000000021, 0.487199999999973, -0.413000000000011, 0.807000000000016, 0.120600000000024, 0.769000000000005, 0.870799999999974, 0.66500000000002, 0.118200000000002, 0.401200000000017, 0.635199999999998, 0.135400000000004, 0.175599999999974, 1.16059999999999, 0.34620000000001, 0.521400000000028, -0.586599999999976, -1.16480000000001, 0.968399999999974, 0.836999999999989, 0.779600000000016, 0.985799999999983),
+    // precision 7
+    Array(91, 89.4934, 87.9758, 86.4574, 84.9718, 83.4954, 81.5302, 80.0756, 78.6374, 77.1782, 75.7888, 73.9522, 72.592, 71.2532, 69.9086, 68.5938, 66.9474, 65.6796, 64.4394, 63.2176, 61.9768, 60.4214, 59.2528, 58.0102, 56.8658, 55.7278, 54.3044, 53.1316, 52.093, 51.0032, 49.9092, 48.6306, 47.5294, 46.5756, 45.6508, 44.662, 43.552, 42.3724, 41.617, 40.5754, 39.7872, 38.8444, 37.7988, 36.8606, 36.2118, 35.3566, 34.4476, 33.5882, 32.6816, 32.0824, 31.0258, 30.6048, 29.4436, 28.7274, 27.957, 27.147, 26.4364, 25.7592, 25.3386, 24.781, 23.8028, 23.656, 22.6544, 21.996, 21.4718, 21.1544, 20.6098, 19.5956, 19.0616, 18.5758, 18.4878, 17.5244, 17.2146, 16.724, 15.8722, 15.5198, 15.0414, 14.941, 14.9048, 13.87, 13.4304, 13.028, 12.4708, 12.37, 12.0624, 11.4668, 11.5532, 11.4352, 11.2564, 10.2744, 10.2118, 9.74720000000002, 10.1456, 9.2928, 8.75040000000001, 8.55279999999999, 8.97899999999998, 8.21019999999999, 8.18340000000001, 7.3494, 7.32499999999999, 7.66140000000001, 6.90300000000002, 7.25439999999998, 6.9042, 7.21499999999997, 6.28640000000001, 6.08139999999997, 6.6764, 6.30099999999999, 5.13900000000001, 5.65800000000002, 5.17320000000001, 4.59019999999998, 4.9538, 5.08280000000002, 4.92200000000003, 4.99020000000002, 4.7328, 5.4538, 4.11360000000002, 4.22340000000003, 4.08780000000002, 3.70800000000003, 4.15559999999999, 4.18520000000001, 3.63720000000001, 3.68220000000002, 3.77960000000002, 3.6078, 2.49160000000001, 3.13099999999997, 2.5376, 3.19880000000001, 3.21100000000001, 2.4502, 3.52820000000003, 2.91199999999998, 3.04480000000001, 2.7432, 2.85239999999999, 2.79880000000003, 2.78579999999999, 1.88679999999999, 2.98860000000002, 2.50639999999999, 1.91239999999999, 2.66160000000002, 2.46820000000002, 1.58199999999999, 1.30399999999997, 2.27379999999999, 2.68939999999998, 1.32900000000001, 3.10599999999999, 1.69080000000002, 2.13740000000001, 2.53219999999999, 1.88479999999998, 1.33240000000001, 1.45119999999997, 1.17899999999997, 2.44119999999998, 1.60659999999996, 2.16700000000003, 0.77940000000001, 2.37900000000002, 2.06700000000001, 1.46000000000004, 2.91160000000002, 1.69200000000001, 0.954600000000028, 2.49300000000005, 2.2722, 1.33500000000004, 2.44899999999996, 1.20140000000004, 3.07380000000001, 2.09739999999999, 2.85640000000001, 2.29960000000005, 2.40899999999999, 1.97040000000004, 0.809799999999996, 1.65279999999996, 2.59979999999996, 0.95799999999997, 2.06799999999998, 2.32780000000002, 4.20159999999998, 1.96320000000003, 1.86400000000003, 1.42999999999995, 3.77940000000001, 1.27200000000005, 1.86440000000005, 2.20600000000002, 3.21900000000005, 1.5154, 2.61019999999996),
+    // precision 8
+    Array(183.2152, 180.2454, 177.2096, 173.6652, 170.6312, 167.6822, 164.249, 161.3296, 158.0038, 155.2074, 152.4612, 149.27, 146.5178, 143.4412, 140.8032, 138.1634, 135.1688, 132.6074, 129.6946, 127.2664, 124.8228, 122.0432, 119.6824, 116.9464, 114.6268, 112.2626, 109.8376, 107.4034, 104.8956, 102.8522, 100.7638, 98.3552, 96.3556, 93.7526, 91.9292, 89.8954, 87.8198, 85.7668, 83.298, 81.6688, 79.9466, 77.9746, 76.1672, 74.3474, 72.3028, 70.8912, 69.114, 67.4646, 65.9744, 64.4092, 62.6022, 60.843, 59.5684, 58.1652, 56.5426, 55.4152, 53.5388, 52.3592, 51.1366, 49.486, 48.3918, 46.5076, 45.509, 44.3834, 43.3498, 42.0668, 40.7346, 40.1228, 38.4528, 37.7, 36.644, 36.0518, 34.5774, 33.9068, 32.432, 32.1666, 30.434, 29.6644, 28.4894, 27.6312, 26.3804, 26.292, 25.5496000000001, 25.0234, 24.8206, 22.6146, 22.4188, 22.117, 20.6762, 20.6576, 19.7864, 19.509, 18.5334, 17.9204, 17.772, 16.2924, 16.8654, 15.1836, 15.745, 15.1316, 15.0386, 14.0136, 13.6342, 12.6196, 12.1866, 12.4281999999999, 11.3324, 10.4794000000001, 11.5038, 10.129, 9.52800000000002, 10.3203999999999, 9.46299999999997, 9.79280000000006, 9.12300000000005, 8.74180000000001, 9.2192, 7.51020000000005, 7.60659999999996, 7.01840000000004, 7.22239999999999, 7.40139999999997, 6.76179999999999, 7.14359999999999, 5.65060000000005, 5.63779999999997, 5.76599999999996, 6.75139999999999, 5.57759999999996, 3.73220000000003, 5.8048, 5.63019999999995, 4.93359999999996, 3.47979999999995, 4.33879999999999, 3.98940000000005, 3.81960000000004, 3.31359999999995, 3.23080000000004, 3.4588, 3.08159999999998, 3.4076, 3.00639999999999, 2.38779999999997, 2.61900000000003, 1.99800000000005, 3.34820000000002, 2.95060000000001, 0.990999999999985, 2.11440000000005, 2.20299999999997, 2.82219999999995, 2.73239999999998, 2.7826, 3.76660000000004, 2.26480000000004, 2.31280000000004, 2.40819999999997, 2.75360000000001, 3.33759999999995, 2.71559999999999, 1.7478000000001, 1.42920000000004, 2.39300000000003, 2.22779999999989, 2.34339999999997, 0.87259999999992, 3.88400000000001, 1.80600000000004, 1.91759999999999, 1.16779999999994, 1.50320000000011, 2.52500000000009, 0.226400000000012, 2.31500000000005, 0.930000000000064, 1.25199999999995, 2.14959999999996, 0.0407999999999902, 2.5447999999999, 1.32960000000003, 0.197400000000016, 2.52620000000002, 3.33279999999991, -1.34300000000007, 0.422199999999975, 0.917200000000093, 1.12920000000008, 1.46060000000011, 1.45779999999991, 2.8728000000001, 3.33359999999993, -1.34079999999994, 1.57680000000005, 0.363000000000056, 1.40740000000005, 0.656600000000026, 0.801400000000058, -0.454600000000028, 1.51919999999996),
+    // precision 9
+    Array(368, 361.8294, 355.2452, 348.6698, 342.1464, 336.2024, 329.8782, 323.6598, 317.462, 311.2826, 305.7102, 299.7416, 293.9366, 288.1046, 282.285, 277.0668, 271.306, 265.8448, 260.301, 254.9886, 250.2422, 244.8138, 239.7074, 234.7428, 229.8402, 225.1664, 220.3534, 215.594, 210.6886, 205.7876, 201.65, 197.228, 192.8036, 188.1666, 184.0818, 180.0824, 176.2574, 172.302, 168.1644, 164.0056, 160.3802, 156.7192, 152.5234, 149.2084, 145.831, 142.485, 139.1112, 135.4764, 131.76, 129.3368, 126.5538, 122.5058, 119.2646, 116.5902, 113.3818, 110.8998, 107.9532, 105.2062, 102.2798, 99.4728, 96.9582, 94.3292, 92.171, 89.7809999999999, 87.5716, 84.7048, 82.5322, 79.875, 78.3972, 75.3464, 73.7274, 71.2834, 70.1444, 68.4263999999999, 66.0166, 64.018, 62.0437999999999, 60.3399999999999, 58.6856, 57.9836, 55.0311999999999, 54.6769999999999, 52.3188, 51.4846, 49.4423999999999, 47.739, 46.1487999999999, 44.9202, 43.4059999999999, 42.5342000000001, 41.2834, 38.8954000000001, 38.3286000000001, 36.2146, 36.6684, 35.9946, 33.123, 33.4338, 31.7378000000001, 29.076, 28.9692, 27.4964, 27.0998, 25.9864, 26.7754, 24.3208, 23.4838, 22.7388000000001, 24.0758000000001, 21.9097999999999, 20.9728, 19.9228000000001, 19.9292, 16.617, 17.05, 18.2996000000001, 15.6128000000001, 15.7392, 14.5174, 13.6322, 12.2583999999999, 13.3766000000001, 11.423, 13.1232, 9.51639999999998, 10.5938000000001, 9.59719999999993, 8.12220000000002, 9.76739999999995, 7.50440000000003, 7.56999999999994, 6.70440000000008, 6.41419999999994, 6.71019999999999, 5.60940000000005, 4.65219999999999, 6.84099999999989, 3.4072000000001, 3.97859999999991, 3.32760000000007, 5.52160000000003, 3.31860000000006, 2.06940000000009, 4.35400000000004, 1.57500000000005, 0.280799999999999, 2.12879999999996, -0.214799999999968, -0.0378000000000611, -0.658200000000079, 0.654800000000023, -0.0697999999999865, 0.858400000000074, -2.52700000000004, -2.1751999999999, -3.35539999999992, -1.04019999999991, -0.651000000000067, -2.14439999999991, -1.96659999999997, -3.97939999999994, -0.604400000000169, -3.08260000000018, -3.39159999999993, -5.29640000000018, -5.38920000000007, -5.08759999999984, -4.69900000000007, -5.23720000000003, -3.15779999999995, -4.97879999999986, -4.89899999999989, -7.48880000000008, -5.94799999999987, -5.68060000000014, -6.67180000000008, -4.70499999999993, -7.27779999999984, -4.6579999999999, -4.4362000000001, -4.32139999999981, -5.18859999999995, -6.66879999999992, -6.48399999999992, -5.1260000000002, -4.4032000000002, -6.13500000000022, -5.80819999999994, -4.16719999999987, -4.15039999999999, -7.45600000000013, -7.24080000000004, -9.83179999999993, -5.80420000000004, -8.6561999999999, -6.99940000000015, -10.5473999999999, -7.34139999999979, -6.80999999999995, -6.29719999999998, -6.23199999999997),
+    // precision 10
+    Array(737.1256, 724.4234, 711.1064, 698.4732, 685.4636, 673.0644, 660.488, 647.9654, 636.0832, 623.7864, 612.1992, 600.2176, 588.5228, 577.1716, 565.7752, 554.899, 543.6126, 532.6492, 521.9474, 511.5214, 501.1064, 490.6364, 480.2468, 470.4588, 460.3832, 451.0584, 440.8606, 431.3868, 422.5062, 413.1862, 404.463, 395.339, 386.1936, 378.1292, 369.1854, 361.2908, 353.3324, 344.8518, 337.5204, 329.4854, 321.9318, 314.552, 306.4658, 299.4256, 292.849, 286.152, 278.8956, 271.8792, 265.118, 258.62, 252.5132, 245.9322, 239.7726, 233.6086, 227.5332, 222.5918, 216.4294, 210.7662, 205.4106, 199.7338, 194.9012, 188.4486, 183.1556, 178.6338, 173.7312, 169.6264, 163.9526, 159.8742, 155.8326, 151.1966, 147.5594, 143.07, 140.037, 134.1804, 131.071, 127.4884, 124.0848, 120.2944, 117.333, 112.9626, 110.2902, 107.0814, 103.0334, 99.4832000000001, 96.3899999999999, 93.7202000000002, 90.1714000000002, 87.2357999999999, 85.9346, 82.8910000000001, 80.0264000000002, 78.3834000000002, 75.1543999999999, 73.8683999999998, 70.9895999999999, 69.4367999999999, 64.8701999999998, 65.0408000000002, 61.6738, 59.5207999999998, 57.0158000000001, 54.2302, 53.0962, 50.4985999999999, 52.2588000000001, 47.3914, 45.6244000000002, 42.8377999999998, 43.0072, 40.6516000000001, 40.2453999999998, 35.2136, 36.4546, 33.7849999999999, 33.2294000000002, 32.4679999999998, 30.8670000000002, 28.6507999999999, 28.9099999999999, 27.5983999999999, 26.1619999999998, 24.5563999999999, 23.2328000000002, 21.9484000000002, 21.5902000000001, 21.3346000000001, 17.7031999999999, 20.6111999999998, 19.5545999999999, 15.7375999999999, 17.0720000000001, 16.9517999999998, 15.326, 13.1817999999998, 14.6925999999999, 13.0859999999998, 13.2754, 10.8697999999999, 11.248, 7.3768, 4.72339999999986, 7.97899999999981, 8.7503999999999, 7.68119999999999, 9.7199999999998, 7.73919999999998, 5.6224000000002, 7.44560000000001, 6.6601999999998, 5.9058, 4.00199999999995, 4.51699999999983, 4.68240000000014, 3.86220000000003, 5.13639999999987, 5.98500000000013, 2.47719999999981, 2.61999999999989, 1.62800000000016, 4.65000000000009, 0.225599999999758, 0.831000000000131, -0.359400000000278, 1.27599999999984, -2.92559999999958, -0.0303999999996449, 2.37079999999969, -2.0033999999996, 0.804600000000391, 0.30199999999968, 1.1247999999996, -2.6880000000001, 0.0321999999996478, -1.18099999999959, -3.9402, -1.47940000000017, -0.188400000000001, -2.10720000000038, -2.04159999999956, -3.12880000000041, -4.16160000000036, -0.612799999999879, -3.48719999999958, -8.17900000000009, -5.37780000000021, -4.01379999999972, -5.58259999999973, -5.73719999999958, -7.66799999999967, -5.69520000000011, -1.1247999999996, -5.58520000000044, -8.04560000000038, -4.64840000000004, -11.6468000000004, -7.97519999999986, -5.78300000000036, -7.67420000000038, -10.6328000000003, -9.81720000000041),
+    // precision 11
+    Array(1476, 1449.6014, 1423.5802, 1397.7942, 1372.3042, 1347.2062, 1321.8402, 1297.2292, 1272.9462, 1248.9926, 1225.3026, 1201.4252, 1178.0578, 1155.6092, 1132.626, 1110.5568, 1088.527, 1066.5154, 1045.1874, 1024.3878, 1003.37, 982.1972, 962.5728, 942.1012, 922.9668, 903.292, 884.0772, 864.8578, 846.6562, 828.041, 809.714, 792.3112, 775.1806, 757.9854, 740.656, 724.346, 707.5154, 691.8378, 675.7448, 659.6722, 645.5722, 630.1462, 614.4124, 600.8728, 585.898, 572.408, 558.4926, 544.4938, 531.6776, 517.282, 505.7704, 493.1012, 480.7388, 467.6876, 456.1872, 445.5048, 433.0214, 420.806, 411.409, 400.4144, 389.4294, 379.2286, 369.651, 360.6156, 350.337, 342.083, 332.1538, 322.5094, 315.01, 305.6686, 298.1678, 287.8116, 280.9978, 271.9204, 265.3286, 257.5706, 249.6014, 242.544, 235.5976, 229.583, 220.9438, 214.672, 208.2786, 201.8628, 195.1834, 191.505, 186.1816, 178.5188, 172.2294, 167.8908, 161.0194, 158.052, 151.4588, 148.1596, 143.4344, 138.5238, 133.13, 127.6374, 124.8162, 118.7894, 117.3984, 114.6078, 109.0858, 105.1036, 103.6258, 98.6018000000004, 95.7618000000002, 93.5821999999998, 88.5900000000001, 86.9992000000002, 82.8800000000001, 80.4539999999997, 74.6981999999998, 74.3644000000004, 73.2914000000001, 65.5709999999999, 66.9232000000002, 65.1913999999997, 62.5882000000001, 61.5702000000001, 55.7035999999998, 56.1764000000003, 52.7596000000003, 53.0302000000001, 49.0609999999997, 48.4694, 44.933, 46.0474000000004, 44.7165999999997, 41.9416000000001, 39.9207999999999, 35.6328000000003, 35.5276000000003, 33.1934000000001, 33.2371999999996, 33.3864000000003, 33.9228000000003, 30.2371999999996, 29.1373999999996, 25.2272000000003, 24.2942000000003, 19.8338000000003, 18.9005999999999, 23.0907999999999, 21.8544000000002, 19.5176000000001, 15.4147999999996, 16.9314000000004, 18.6737999999996, 12.9877999999999, 14.3688000000002, 12.0447999999997, 15.5219999999999, 12.5299999999997, 14.5940000000001, 14.3131999999996, 9.45499999999993, 12.9441999999999, 3.91139999999996, 13.1373999999996, 5.44720000000052, 9.82779999999912, 7.87279999999919, 3.67760000000089, 5.46980000000076, 5.55099999999948, 5.65979999999945, 3.89439999999922, 3.1275999999998, 5.65140000000065, 6.3062000000009, 3.90799999999945, 1.87060000000019, 5.17020000000048, 2.46680000000015, 0.770000000000437, -3.72340000000077, 1.16400000000067, 8.05340000000069, 0.135399999999208, 2.15940000000046, 0.766999999999825, 1.0594000000001, 3.15500000000065, -0.287399999999252, 2.37219999999979, -2.86620000000039, -1.63199999999961, -2.22979999999916, -0.15519999999924, -1.46039999999994, -0.262199999999211, -2.34460000000036, -2.8078000000005, -3.22179999999935, -5.60159999999996, -8.42200000000048, -9.43740000000071, 0.161799999999857, -10.4755999999998, -10.0823999999993),
+    // precision 12
+    Array(2953, 2900.4782, 2848.3568, 2796.3666, 2745.324, 2694.9598, 2644.648, 2595.539, 2546.1474, 2498.2576, 2450.8376, 2403.6076, 2357.451, 2311.38, 2266.4104, 2221.5638, 2176.9676, 2134.193, 2090.838, 2048.8548, 2007.018, 1966.1742, 1925.4482, 1885.1294, 1846.4776, 1807.4044, 1768.8724, 1731.3732, 1693.4304, 1657.5326, 1621.949, 1586.5532, 1551.7256, 1517.6182, 1483.5186, 1450.4528, 1417.865, 1385.7164, 1352.6828, 1322.6708, 1291.8312, 1260.9036, 1231.476, 1201.8652, 1173.6718, 1145.757, 1119.2072, 1092.2828, 1065.0434, 1038.6264, 1014.3192, 988.5746, 965.0816, 940.1176, 917.9796, 894.5576, 871.1858, 849.9144, 827.1142, 805.0818, 783.9664, 763.9096, 742.0816, 724.3962, 706.3454, 688.018, 667.4214, 650.3106, 633.0686, 613.8094, 597.818, 581.4248, 563.834, 547.363, 531.5066, 520.455400000001, 505.583199999999, 488.366, 476.480799999999, 459.7682, 450.0522, 434.328799999999, 423.952799999999, 408.727000000001, 399.079400000001, 387.252200000001, 373.987999999999, 360.852000000001, 351.6394, 339.642, 330.902400000001, 322.661599999999, 311.662200000001, 301.3254, 291.7484, 279.939200000001, 276.7508, 263.215200000001, 254.811400000001, 245.5494, 242.306399999999, 234.8734, 223.787200000001, 217.7156, 212.0196, 200.793, 195.9748, 189.0702, 182.449199999999, 177.2772, 170.2336, 164.741, 158.613600000001, 155.311, 147.5964, 142.837, 137.3724, 132.0162, 130.0424, 121.9804, 120.451800000001, 114.8968, 111.585999999999, 105.933199999999, 101.705, 98.5141999999996, 95.0488000000005, 89.7880000000005, 91.4750000000004, 83.7764000000006, 80.9698000000008, 72.8574000000008, 73.1615999999995, 67.5838000000003, 62.6263999999992, 63.2638000000006, 66.0977999999996, 52.0843999999997, 58.9956000000002, 47.0912000000008, 46.4956000000002, 48.4383999999991, 47.1082000000006, 43.2392, 37.2759999999998, 40.0283999999992, 35.1864000000005, 35.8595999999998, 32.0998, 28.027, 23.6694000000007, 33.8266000000003, 26.3736000000008, 27.2008000000005, 21.3245999999999, 26.4115999999995, 23.4521999999997, 19.5013999999992, 19.8513999999996, 10.7492000000002, 18.6424000000006, 13.1265999999996, 18.2436000000016, 6.71860000000015, 3.39459999999963, 6.33759999999893, 7.76719999999841, 0.813999999998487, 3.82819999999992, 0.826199999999517, 8.07440000000133, -1.59080000000176, 5.01780000000144, 0.455399999998917, -0.24199999999837, 0.174800000000687, -9.07640000000174, -4.20160000000033, -3.77520000000004, -4.75179999999818, -5.3724000000002, -8.90680000000066, -6.10239999999976, -5.74120000000039, -9.95339999999851, -3.86339999999836, -13.7304000000004, -16.2710000000006, -7.51359999999841, -3.30679999999847, -13.1339999999982, -10.0551999999989, -6.72019999999975, -8.59660000000076, -10.9307999999983, -1.8775999999998, -4.82259999999951, -13.7788, -21.6470000000008, -10.6735999999983, -15.7799999999988),
+    // precision 13
+    Array(5907.5052, 5802.2672, 5697.347, 5593.5794, 5491.2622, 5390.5514, 5290.3376, 5191.6952, 5093.5988, 4997.3552, 4902.5972, 4808.3082, 4715.5646, 4624.109, 4533.8216, 4444.4344, 4356.3802, 4269.2962, 4183.3784, 4098.292, 4014.79, 3932.4574, 3850.6036, 3771.2712, 3691.7708, 3615.099, 3538.1858, 3463.4746, 3388.8496, 3315.6794, 3244.5448, 3173.7516, 3103.3106, 3033.6094, 2966.5642, 2900.794, 2833.7256, 2769.81, 2707.3196, 2644.0778, 2583.9916, 2523.4662, 2464.124, 2406.073, 2347.0362, 2292.1006, 2238.1716, 2182.7514, 2128.4884, 2077.1314, 2025.037, 1975.3756, 1928.933, 1879.311, 1831.0006, 1783.2144, 1738.3096, 1694.5144, 1649.024, 1606.847, 1564.7528, 1525.3168, 1482.5372, 1443.9668, 1406.5074, 1365.867, 1329.2186, 1295.4186, 1257.9716, 1225.339, 1193.2972, 1156.3578, 1125.8686, 1091.187, 1061.4094, 1029.4188, 1000.9126, 972.3272, 944.004199999999, 915.7592, 889.965, 862.834200000001, 840.4254, 812.598399999999, 785.924200000001, 763.050999999999, 741.793799999999, 721.466, 699.040799999999, 677.997200000002, 649.866999999998, 634.911800000002, 609.8694, 591.981599999999, 570.2922, 557.129199999999, 538.3858, 521.872599999999, 502.951400000002, 495.776399999999, 475.171399999999, 459.751, 439.995200000001, 426.708999999999, 413.7016, 402.3868, 387.262599999998, 372.0524, 357.050999999999, 342.5098, 334.849200000001, 322.529399999999, 311.613799999999, 295.848000000002, 289.273000000001, 274.093000000001, 263.329600000001, 251.389599999999, 245.7392, 231.9614, 229.7952, 217.155200000001, 208.9588, 199.016599999999, 190.839199999999, 180.6976, 176.272799999999, 166.976999999999, 162.5252, 151.196400000001, 149.386999999999, 133.981199999998, 130.0586, 130.164000000001, 122.053400000001, 110.7428, 108.1276, 106.232400000001, 100.381600000001, 98.7668000000012, 86.6440000000002, 79.9768000000004, 82.4722000000002, 68.7026000000005, 70.1186000000016, 71.9948000000004, 58.998599999999, 59.0492000000013, 56.9818000000014, 47.5338000000011, 42.9928, 51.1591999999982, 37.2740000000013, 42.7220000000016, 31.3734000000004, 26.8090000000011, 25.8934000000008, 26.5286000000015, 29.5442000000003, 19.3503999999994, 26.0760000000009, 17.9527999999991, 14.8419999999969, 10.4683999999979, 8.65899999999965, 9.86720000000059, 4.34139999999752, -0.907800000000861, -3.32080000000133, -0.936199999996461, -11.9916000000012, -8.87000000000262, -6.33099999999831, -11.3366000000024, -15.9207999999999, -9.34659999999712, -15.5034000000014, -19.2097999999969, -15.357799999998, -28.2235999999975, -30.6898000000001, -19.3271999999997, -25.6083999999973, -24.409599999999, -13.6385999999984, -33.4473999999973, -32.6949999999997, -28.9063999999998, -31.7483999999968, -32.2935999999972, -35.8329999999987, -47.620600000002, -39.0855999999985, -33.1434000000008, -46.1371999999974, -37.5892000000022, -46.8164000000033, -47.3142000000007, -60.2914000000019, -37.7575999999972),
+    // precision 14
+    Array(11816.475, 11605.0046, 11395.3792, 11188.7504, 10984.1814, 10782.0086, 10582.0072, 10384.503, 10189.178, 9996.2738, 9806.0344, 9617.9798, 9431.394, 9248.7784, 9067.6894, 8889.6824, 8712.9134, 8538.8624, 8368.4944, 8197.7956, 8031.8916, 7866.6316, 7703.733, 7544.5726, 7386.204, 7230.666, 7077.8516, 6926.7886, 6778.6902, 6631.9632, 6487.304, 6346.7486, 6206.4408, 6070.202, 5935.2576, 5799.924, 5671.0324, 5541.9788, 5414.6112, 5290.0274, 5166.723, 5047.6906, 4929.162, 4815.1406, 4699.127, 4588.5606, 4477.7394, 4369.4014, 4264.2728, 4155.9224, 4055.581, 3955.505, 3856.9618, 3761.3828, 3666.9702, 3575.7764, 3482.4132, 3395.0186, 3305.8852, 3221.415, 3138.6024, 3056.296, 2970.4494, 2896.1526, 2816.8008, 2740.2156, 2670.497, 2594.1458, 2527.111, 2460.8168, 2387.5114, 2322.9498, 2260.6752, 2194.2686, 2133.7792, 2074.767, 2015.204, 1959.4226, 1898.6502, 1850.006, 1792.849, 1741.4838, 1687.9778, 1638.1322, 1589.3266, 1543.1394, 1496.8266, 1447.8516, 1402.7354, 1361.9606, 1327.0692, 1285.4106, 1241.8112, 1201.6726, 1161.973, 1130.261, 1094.2036, 1048.2036, 1020.6436, 990.901400000002, 961.199800000002, 924.769800000002, 899.526400000002, 872.346400000002, 834.375, 810.432000000001, 780.659800000001, 756.013800000001, 733.479399999997, 707.923999999999, 673.858, 652.222399999999, 636.572399999997, 615.738599999997, 586.696400000001, 564.147199999999, 541.679600000003, 523.943599999999, 505.714599999999, 475.729599999999, 461.779600000002, 449.750800000002, 439.020799999998, 412.7886, 400.245600000002, 383.188199999997, 362.079599999997, 357.533799999997, 334.319000000003, 327.553399999997, 308.559399999998, 291.270199999999, 279.351999999999, 271.791400000002, 252.576999999997, 247.482400000001, 236.174800000001, 218.774599999997, 220.155200000001, 208.794399999999, 201.223599999998, 182.995600000002, 185.5268, 164.547400000003, 176.5962, 150.689599999998, 157.8004, 138.378799999999, 134.021200000003, 117.614399999999, 108.194000000003, 97.0696000000025, 89.6042000000016, 95.6030000000028, 84.7810000000027, 72.635000000002, 77.3482000000004, 59.4907999999996, 55.5875999999989, 50.7346000000034, 61.3916000000027, 50.9149999999936, 39.0384000000049, 58.9395999999979, 29.633600000001, 28.2032000000036, 26.0078000000067, 17.0387999999948, 9.22000000000116, 13.8387999999977, 8.07240000000456, 14.1549999999988, 15.3570000000036, 3.42660000000615, 6.24820000000182, -2.96940000000177, -8.79940000000352, -5.97860000000219, -14.4048000000039, -3.4143999999942, -13.0148000000045, -11.6977999999945, -25.7878000000055, -22.3185999999987, -24.409599999999, -31.9756000000052, -18.9722000000038, -22.8678000000073, -30.8972000000067, -32.3715999999986, -22.3907999999938, -43.6720000000059, -35.9038, -39.7492000000057, -54.1641999999993, -45.2749999999942, -42.2989999999991, -44.1089999999967, -64.3564000000042, -49.9551999999967, -42.6116000000038),
+    // precision 15
+    Array(23634.0036, 23210.8034, 22792.4744, 22379.1524, 21969.7928, 21565.326, 21165.3532, 20770.2806, 20379.9892, 19994.7098, 19613.318, 19236.799, 18865.4382, 18498.8244, 18136.5138, 17778.8668, 17426.2344, 17079.32, 16734.778, 16397.2418, 16063.3324, 15734.0232, 15409.731, 15088.728, 14772.9896, 14464.1402, 14157.5588, 13855.5958, 13559.3296, 13264.9096, 12978.326, 12692.0826, 12413.8816, 12137.3192, 11870.2326, 11602.5554, 11340.3142, 11079.613, 10829.5908, 10583.5466, 10334.0344, 10095.5072, 9859.694, 9625.2822, 9395.7862, 9174.0586, 8957.3164, 8738.064, 8524.155, 8313.7396, 8116.9168, 7913.542, 7718.4778, 7521.65, 7335.5596, 7154.2906, 6968.7396, 6786.3996, 6613.236, 6437.406, 6270.6598, 6107.7958, 5945.7174, 5787.6784, 5635.5784, 5482.308, 5337.9784, 5190.0864, 5045.9158, 4919.1386, 4771.817, 4645.7742, 4518.4774, 4385.5454, 4262.6622, 4142.74679999999, 4015.5318, 3897.9276, 3790.7764, 3685.13800000001, 3573.6274, 3467.9706, 3368.61079999999, 3271.5202, 3170.3848, 3076.4656, 2982.38400000001, 2888.4664, 2806.4868, 2711.9564, 2634.1434, 2551.3204, 2469.7662, 2396.61139999999, 2318.9902, 2243.8658, 2171.9246, 2105.01360000001, 2028.8536, 1960.9952, 1901.4096, 1841.86079999999, 1777.54700000001, 1714.5802, 1654.65059999999, 1596.311, 1546.2016, 1492.3296, 1433.8974, 1383.84600000001, 1339.4152, 1293.5518, 1245.8686, 1193.50659999999, 1162.27959999999, 1107.19439999999, 1069.18060000001, 1035.09179999999, 999.679000000004, 957.679999999993, 925.300199999998, 888.099400000006, 848.638600000006, 818.156400000007, 796.748399999997, 752.139200000005, 725.271200000003, 692.216, 671.633600000001, 647.939799999993, 621.670599999998, 575.398799999995, 561.226599999995, 532.237999999998, 521.787599999996, 483.095799999996, 467.049599999998, 465.286399999997, 415.548599999995, 401.047399999996, 380.607999999993, 377.362599999993, 347.258799999996, 338.371599999999, 310.096999999994, 301.409199999995, 276.280799999993, 265.586800000005, 258.994399999996, 223.915999999997, 215.925399999993, 213.503800000006, 191.045400000003, 166.718200000003, 166.259000000005, 162.941200000001, 148.829400000002, 141.645999999993, 123.535399999993, 122.329800000007, 89.473399999988, 80.1962000000058, 77.5457999999926, 59.1056000000099, 83.3509999999951, 52.2906000000075, 36.3979999999865, 40.6558000000077, 42.0003999999899, 19.6630000000005, 19.7153999999864, -8.38539999999921, -0.692799999989802, 0.854800000000978, 3.23219999999856, -3.89040000000386, -5.25880000001052, -24.9052000000083, -22.6837999999989, -26.4286000000138, -34.997000000003, -37.0216000000073, -43.430400000012, -58.2390000000014, -68.8034000000043, -56.9245999999985, -57.8583999999973, -77.3097999999882, -73.2793999999994, -81.0738000000129, -87.4530000000086, -65.0254000000132, -57.296399999992, -96.2746000000043, -103.25, -96.081600000005, -91.5542000000132, -102.465200000006, -107.688599999994, -101.458000000013, -109.715800000005),
+    // precision 16
+    Array(47270, 46423.3584, 45585.7074, 44757.152, 43938.8416, 43130.9514, 42330.03, 41540.407, 40759.6348, 39988.206, 39226.5144, 38473.2096, 37729.795, 36997.268, 36272.6448, 35558.665, 34853.0248, 34157.4472, 33470.5204, 32793.5742, 32127.0194, 31469.4182, 30817.6136, 30178.6968, 29546.8908, 28922.8544, 28312.271, 27707.0924, 27114.0326, 26526.692, 25948.6336, 25383.7826, 24823.5998, 24272.2974, 23732.2572, 23201.4976, 22674.2796, 22163.6336, 21656.515, 21161.7362, 20669.9368, 20189.4424, 19717.3358, 19256.3744, 18795.9638, 18352.197, 17908.5738, 17474.391, 17052.918, 16637.2236, 16228.4602, 15823.3474, 15428.6974, 15043.0284, 14667.6278, 14297.4588, 13935.2882, 13578.5402, 13234.6032, 12882.1578, 12548.0728, 12219.231, 11898.0072, 11587.2626, 11279.9072, 10973.5048, 10678.5186, 10392.4876, 10105.2556, 9825.766, 9562.5444, 9294.2222, 9038.2352, 8784.848, 8533.2644, 8301.7776, 8058.30859999999, 7822.94579999999, 7599.11319999999, 7366.90779999999, 7161.217, 6957.53080000001, 6736.212, 6548.21220000001, 6343.06839999999, 6156.28719999999, 5975.15419999999, 5791.75719999999, 5621.32019999999, 5451.66, 5287.61040000001, 5118.09479999999, 4957.288, 4798.4246, 4662.17559999999, 4512.05900000001, 4364.68539999999, 4220.77720000001, 4082.67259999999, 3957.19519999999, 3842.15779999999, 3699.3328, 3583.01180000001, 3473.8964, 3338.66639999999, 3233.55559999999, 3117.799, 3008.111, 2909.69140000001, 2814.86499999999, 2719.46119999999, 2624.742, 2532.46979999999, 2444.7886, 2370.1868, 2272.45259999999, 2196.19260000001, 2117.90419999999, 2023.2972, 1969.76819999999, 1885.58979999999, 1833.2824, 1733.91200000001, 1682.54920000001, 1604.57980000001, 1556.11240000001, 1491.3064, 1421.71960000001, 1371.22899999999, 1322.1324, 1264.7892, 1196.23920000001, 1143.8474, 1088.67240000001, 1073.60380000001, 1023.11660000001, 959.036400000012, 927.433199999999, 906.792799999996, 853.433599999989, 841.873800000001, 791.1054, 756.899999999994, 704.343200000003, 672.495599999995, 622.790399999998, 611.254799999995, 567.283200000005, 519.406599999988, 519.188400000014, 495.312800000014, 451.350799999986, 443.973399999988, 431.882199999993, 392.027000000002, 380.924200000009, 345.128999999986, 298.901400000002, 287.771999999997, 272.625, 247.253000000026, 222.490600000019, 223.590000000026, 196.407599999977, 176.425999999978, 134.725199999986, 132.4804, 110.445599999977, 86.7939999999944, 56.7038000000175, 64.915399999998, 38.3726000000024, 37.1606000000029, 46.170999999973, 49.1716000000015, 15.3362000000197, 6.71639999997569, -34.8185999999987, -39.4476000000141, 12.6830000000191, -12.3331999999937, -50.6565999999875, -59.9538000000175, -65.1054000000004, -70.7576000000117, -106.325200000021, -126.852200000023, -110.227599999984, -132.885999999999, -113.897200000007, -142.713800000027, -151.145399999979, -150.799200000009, -177.756200000003, -156.036399999983, -182.735199999996, -177.259399999981, -198.663600000029, -174.577600000019, -193.84580000001),
+    // precision 17
+    Array(94541, 92848.811, 91174.019, 89517.558, 87879.9705, 86262.7565, 84663.5125, 83083.7435, 81521.7865, 79977.272, 78455.9465, 76950.219, 75465.432, 73994.152, 72546.71, 71115.2345, 69705.6765, 68314.937, 66944.2705, 65591.255, 64252.9485, 62938.016, 61636.8225, 60355.592, 59092.789, 57850.568, 56624.518, 55417.343, 54231.1415, 53067.387, 51903.526, 50774.649, 49657.6415, 48561.05, 47475.7575, 46410.159, 45364.852, 44327.053, 43318.4005, 42325.6165, 41348.4595, 40383.6265, 39436.77, 38509.502, 37594.035, 36695.939, 35818.6895, 34955.691, 34115.8095, 33293.949, 32465.0775, 31657.6715, 30877.2585, 30093.78, 29351.3695, 28594.1365, 27872.115, 27168.7465, 26477.076, 25774.541, 25106.5375, 24452.5135, 23815.5125, 23174.0655, 22555.2685, 21960.2065, 21376.3555, 20785.1925, 20211.517, 19657.0725, 19141.6865, 18579.737, 18081.3955, 17578.995, 17073.44, 16608.335, 16119.911, 15651.266, 15194.583, 14749.0495, 14343.4835, 13925.639, 13504.509, 13099.3885, 12691.2855, 12328.018, 11969.0345, 11596.5145, 11245.6355, 10917.6575, 10580.9785, 10277.8605, 9926.58100000001, 9605.538, 9300.42950000003, 8989.97850000003, 8728.73249999998, 8448.3235, 8175.31050000002, 7898.98700000002, 7629.79100000003, 7413.76199999999, 7149.92300000001, 6921.12650000001, 6677.1545, 6443.28000000003, 6278.23450000002, 6014.20049999998, 5791.20299999998, 5605.78450000001, 5438.48800000001, 5234.2255, 5059.6825, 4887.43349999998, 4682.935, 4496.31099999999, 4322.52250000002, 4191.42499999999, 4021.24200000003, 3900.64799999999, 3762.84250000003, 3609.98050000001, 3502.29599999997, 3363.84250000003, 3206.54849999998, 3079.70000000001, 2971.42300000001, 2867.80349999998, 2727.08100000001, 2630.74900000001, 2496.6165, 2440.902, 2356.19150000002, 2235.58199999999, 2120.54149999999, 2012.25449999998, 1933.35600000003, 1820.93099999998, 1761.54800000001, 1663.09350000002, 1578.84600000002, 1509.48149999999, 1427.3345, 1379.56150000001, 1306.68099999998, 1212.63449999999, 1084.17300000001, 1124.16450000001, 1060.69949999999, 1007.48849999998, 941.194499999983, 879.880500000028, 836.007500000007, 782.802000000025, 748.385499999975, 647.991500000004, 626.730500000005, 570.776000000013, 484.000500000024, 513.98550000001, 418.985499999952, 386.996999999974, 370.026500000036, 355.496999999974, 356.731499999994, 255.92200000002, 259.094000000041, 205.434499999974, 165.374500000034, 197.347500000033, 95.718499999959, 67.6165000000037, 54.6970000000438, 31.7395000000251, -15.8784999999916, 8.42500000004657, -26.3754999999655, -118.425500000012, -66.6629999999423, -42.9745000000112, -107.364999999991, -189.839000000036, -162.611499999999, -164.964999999967, -189.079999999958, -223.931499999948, -235.329999999958, -269.639500000048, -249.087999999989, -206.475499999942, -283.04449999996, -290.667000000016, -304.561499999953, -336.784499999951, -380.386500000022, -283.280499999993, -364.533000000054, -389.059499999974, -364.454000000027, -415.748000000021, -417.155000000028),
+    // precision 18
+    Array(189083, 185696.913, 182348.774, 179035.946, 175762.762, 172526.444, 169329.754, 166166.099, 163043.269, 159958.91, 156907.912, 153906.845, 150924.199, 147996.568, 145093.457, 142239.233, 139421.475, 136632.27, 133889.588, 131174.2, 128511.619, 125868.621, 123265.385, 120721.061, 118181.769, 115709.456, 113252.446, 110840.198, 108465.099, 106126.164, 103823.469, 101556.618, 99308.004, 97124.508, 94937.803, 92833.731, 90745.061, 88677.627, 86617.47, 84650.442, 82697.833, 80769.132, 78879.629, 77014.432, 75215.626, 73384.587, 71652.482, 69895.93, 68209.301, 66553.669, 64921.981, 63310.323, 61742.115, 60205.018, 58698.658, 57190.657, 55760.865, 54331.169, 52908.167, 51550.273, 50225.254, 48922.421, 47614.533, 46362.049, 45098.569, 43926.083, 42736.03, 41593.473, 40425.26, 39316.237, 38243.651, 37170.617, 36114.609, 35084.19, 34117.233, 33206.509, 32231.505, 31318.728, 30403.404, 29540.0550000001, 28679.236, 27825.862, 26965.216, 26179.148, 25462.08, 24645.952, 23922.523, 23198.144, 22529.128, 21762.4179999999, 21134.779, 20459.117, 19840.818, 19187.04, 18636.3689999999, 17982.831, 17439.7389999999, 16874.547, 16358.2169999999, 15835.684, 15352.914, 14823.681, 14329.313, 13816.897, 13342.874, 12880.882, 12491.648, 12021.254, 11625.392, 11293.7610000001, 10813.697, 10456.209, 10099.074, 9755.39000000001, 9393.18500000006, 9047.57900000003, 8657.98499999999, 8395.85900000005, 8033, 7736.95900000003, 7430.59699999995, 7258.47699999996, 6924.58200000005, 6691.29399999999, 6357.92500000005, 6202.05700000003, 5921.19700000004, 5628.28399999999, 5404.96799999999, 5226.71100000001, 4990.75600000005, 4799.77399999998, 4622.93099999998, 4472.478, 4171.78700000001, 3957.46299999999, 3868.95200000005, 3691.14300000004, 3474.63100000005, 3341.67200000002, 3109.14000000001, 3071.97400000005, 2796.40399999998, 2756.17799999996, 2611.46999999997, 2471.93000000005, 2382.26399999997, 2209.22400000005, 2142.28399999999, 2013.96100000001, 1911.18999999994, 1818.27099999995, 1668.47900000005, 1519.65800000005, 1469.67599999998, 1367.13800000004, 1248.52899999998, 1181.23600000003, 1022.71900000004, 1088.20700000005, 959.03600000008, 876.095999999903, 791.183999999892, 703.337000000058, 731.949999999953, 586.86400000006, 526.024999999907, 323.004999999888, 320.448000000091, 340.672999999952, 309.638999999966, 216.601999999955, 102.922999999952, 19.2399999999907, -0.114000000059605, -32.6240000000689, -89.3179999999702, -153.497999999905, -64.2970000000205, -143.695999999996, -259.497999999905, -253.017999999924, -213.948000000091, -397.590000000084, -434.006000000052, -403.475000000093, -297.958000000101, -404.317000000039, -528.898999999976, -506.621000000043, -513.205000000075, -479.351000000024, -596.139999999898, -527.016999999993, -664.681000000099, -680.306000000099, -704.050000000047, -850.486000000034, -757.43200000003, -713.308999999892)
+  )
+  // scalastyle:on
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
index ce3dddad87f5..f656ccf13b15 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
@@ -114,6 +114,12 @@ object Utils {
             aggregateFunction = aggregate.Sum(child),
             mode = aggregate.Complete,
             isDistinct = true)
+
+        case expressions.ApproxCountDistinct(child, rsd) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.HyperLogLogPlusPlus(child, rsd),
+            mode = aggregate.Complete,
+            isDistinct = false)
       }
       // Check if there is any expressions.AggregateExpression1 left.
       // If so, we cannot convert this plan.
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala
new file mode 100644
index 000000000000..ecc0644164de
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala
@@ -0,0 +1,149 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import java.util.Random
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.expressions.{SpecificMutableRow, MutableRow, BoundReference}
+import org.apache.spark.sql.types.{DataType, IntegerType}
+
+import scala.collection.mutable
+import org.scalatest.Assertions._
+
+class HyperLogLogPlusPlusSuite extends SparkFunSuite {
+
+  /** Create a HLL++ instance and an input and output buffer. */
+  def createEstimator(rsd: Double, dt: DataType = IntegerType):
+      (HyperLogLogPlusPlus, MutableRow, MutableRow) = {
+    val input = new SpecificMutableRow(Seq(dt))
+    val hll = new HyperLogLogPlusPlus(new BoundReference(0, dt, true), rsd)
+    val buffer = createBuffer(hll)
+    (hll, input, buffer)
+  }
+
+  def createBuffer(hll: HyperLogLogPlusPlus): MutableRow = {
+    val buffer = new SpecificMutableRow(hll.bufferAttributes.map(_.dataType))
+    hll.initialize(buffer)
+    buffer
+  }
+
+  /** Evaluate the estimate. It should be within 3*SD's of the given true rsd. */
+  def evaluateEstimate(hll: HyperLogLogPlusPlus, buffer: MutableRow, cardinality: Int): Unit = {
+    val estimate = hll.eval(buffer).asInstanceOf[Long].toDouble
+    val error = math.abs((estimate / cardinality.toDouble) - 1.0d)
+    assert(error < hll.trueRsd * 3.0d, "Error should be within 3 std. errors.")
+  }
+
+  test("add nulls") {
+    val (hll, input, buffer) = createEstimator(0.05)
+    input.setNullAt(0)
+    hll.update(buffer, input)
+    hll.update(buffer, input)
+    val estimate = hll.eval(buffer).asInstanceOf[Long]
+    assert(estimate == 0L, "Nothing meaningful added; estimate should be 0.")
+  }
+
+  def testCardinalityEstimates(
+      rsds: Seq[Double],
+      ns: Seq[Int],
+      f: Int => Int,
+      c: Int => Int): Unit = {
+    rsds.flatMap(rsd => ns.map(n => (rsd, n))).foreach {
+      case (rsd, n) =>
+        val (hll, input, buffer) = createEstimator(rsd)
+        var i = 0
+        while (i < n) {
+          input.setInt(0, f(i))
+          hll.update(buffer, input)
+          i += 1
+        }
+        val estimate = hll.eval(buffer).asInstanceOf[Long].toDouble
+        val cardinality = c(n)
+        val error = math.abs((estimate / cardinality.toDouble) - 1.0d)
+        assert(error < hll.trueRsd * 3.0d, "Error should be within 3 std. errors.")
+    }
+  }
+
+  test("deterministic cardinality estimation") {
+    val repeats = 10
+    testCardinalityEstimates(
+      Seq(0.1, 0.05, 0.025, 0.01),
+      Seq(100, 500, 1000, 5000, 10000, 50000, 100000, 500000, 1000000).map(_ * repeats),
+      i => i / repeats,
+      i => i / repeats)
+  }
+
+  test("random cardinality estimation") {
+    val srng = new Random(323981238L)
+    val seen = mutable.HashSet.empty[Int]
+    val update = (i: Int) => {
+      val value = srng.nextInt()
+      seen += value
+      value
+    }
+    val eval = (n: Int) => {
+      val cardinality = seen.size
+      seen.clear()
+      cardinality
+    }
+    testCardinalityEstimates(
+      Seq(0.05, 0.01),
+      Seq(100, 10000, 500000),
+      update,
+      eval)
+  }
+
+  // Test merging
+  test("merging HLL instances") {
+    val (hll, input, buffer1a) = createEstimator(0.05)
+    val buffer1b = createBuffer(hll)
+    val buffer2 = createBuffer(hll)
+
+    // Create the
+    // Add the lower half
+    var i = 0
+    while (i < 500000) {
+      input.setInt(0, i)
+      hll.update(buffer1a, input)
+      i += 1
+    }
+
+    // Add the upper half
+    i = 500000
+    while (i < 1000000) {
+      input.setInt(0, i)
+      hll.update(buffer1b, input)
+      i += 1
+    }
+
+    // Merge the lower and upper halfs.
+    hll.merge(buffer1a, buffer1b)
+
+    // Create the other buffer in reverse
+    i = 999999
+    while (i >= 0) {
+      input.setInt(0, i)
+      hll.update(buffer2, input)
+      i -= 1
+    }
+
+    // Check if the buffers are equal.
+    assert(buffer2 == buffer1a, "Buffers should be equal")
+  }
+}

From c7b29ae6418368a1266b960ba8776317fd867313 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Wed, 30 Sep 2015 11:03:08 -0700
Subject: [PATCH 121/896] [SPARK-10851] [SPARKR] Exception not failing R
 applications (in yarn cluster mode)

The YARN backend doesn't like when user code calls System.exit, since it cannot know the exit status and thus cannot set an appropriate final status for the application.

This PR remove the usage of system.exit to exit the RRunner. Instead, when the R process running an SparkR script returns an exit code other than 0, throws SparkUserAppException which will be caught by ApplicationMaster and ApplicationMaster knows it failed. For other failures, throws SparkException.

Author: Sun Rui <rui.sun@intel.com>

Closes #8938 from sun-rui/SPARK-10851.
---
 .../main/scala/org/apache/spark/deploy/RRunner.scala   | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
index 05b954ce3699..58cc1f9d963d 100644
--- a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
@@ -25,6 +25,7 @@ import scala.collection.JavaConverters._
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.api.r.{RBackend, RUtils}
+import org.apache.spark.{SparkException, SparkUserAppException}
 import org.apache.spark.util.RedirectThread
 
 /**
@@ -84,12 +85,15 @@ object RRunner {
       } finally {
         sparkRBackend.close()
       }
-      System.exit(returnCode)
+      if (returnCode != 0) {
+        throw new SparkUserAppException(returnCode)
+      }
     } else {
+      val errorMessage = s"SparkR backend did not initialize in $backendTimeout seconds"
       // scalastyle:off println
-      System.err.println("SparkR backend did not initialize in " + backendTimeout + " seconds")
+      System.err.println(errorMessage)
       // scalastyle:on println
-      System.exit(-1)
+      throw new SparkException(errorMessage)
     }
   }
 }

From 03cca5dce2cd7618b5c0e33163efb8502415b06e Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 30 Sep 2015 14:36:54 -0400
Subject: [PATCH 122/896] [SPARK-10770] [SQL]
 SparkPlan.executeCollect/executeTake should return InternalRow rather than
 external Row.

Author: Reynold Xin <rxin@databricks.com>

Closes #8900 from rxin/SPARK-10770-1.
---
 .../org/apache/spark/sql/DataFrame.scala      |  2 +-
 .../spark/sql/execution/LocalTableScan.scala  | 10 ++++-----
 .../spark/sql/execution/SparkPlan.scala       | 22 +++++++++++--------
 .../spark/sql/execution/basicOperators.scala  |  7 +++---
 .../apache/spark/sql/execution/commands.scala | 13 ++++++-----
 .../apache/spark/sql/execution/python.scala   | 10 ++++-----
 .../spark/sql/execution/SparkPlanTest.scala   |  2 +-
 .../apache/spark/sql/hive/HiveContext.scala   |  6 ++---
 .../hive/execution/InsertIntoHiveTable.scala  |  6 ++---
 9 files changed, 39 insertions(+), 39 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 9c67ad18c3d2..01f60aba87ed 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1415,7 +1415,7 @@ class DataFrame private[sql](
    * @since 1.3.0
    */
   def collect(): Array[Row] = withNewExecutionId {
-    queryExecution.executedPlan.executeCollect()
+    queryExecution.executedPlan.executeCollectPublic()
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
index 34e926e4582b..adb6bbc4acc5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
@@ -34,13 +34,11 @@ private[sql] case class LocalTableScan(
 
   protected override def doExecute(): RDD[InternalRow] = rdd
 
-  override def executeCollect(): Array[Row] = {
-    val converter = CatalystTypeConverters.createToScalaConverter(schema)
-    rows.map(converter(_).asInstanceOf[Row]).toArray
+  override def executeCollect(): Array[InternalRow] = {
+    rows.toArray
   }
 
-  override def executeTake(limit: Int): Array[Row] = {
-    val converter = CatalystTypeConverters.createToScalaConverter(schema)
-    rows.map(converter(_).asInstanceOf[Row]).take(limit).toArray
+  override def executeTake(limit: Int): Array[InternalRow] = {
+    rows.take(limit).toArray
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
index 72f5450510a1..fcb42047ffe6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
@@ -170,11 +170,16 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
   /**
    * Runs this query returning the result as an array.
    */
-  def executeCollect(): Array[Row] = {
-    execute().mapPartitions { iter =>
-      val converter = CatalystTypeConverters.createToScalaConverter(schema)
-      iter.map(converter(_).asInstanceOf[Row])
-    }.collect()
+  def executeCollect(): Array[InternalRow] = {
+    execute().map(_.copy()).collect()
+  }
+
+  /**
+   * Runs this query returning the result as an array, using external Row format.
+   */
+  def executeCollectPublic(): Array[Row] = {
+    val converter = CatalystTypeConverters.createToScalaConverter(schema)
+    executeCollect().map(converter(_).asInstanceOf[Row])
   }
 
   /**
@@ -182,9 +187,9 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
    *
    * This is modeled after RDD.take but never runs any job locally on the driver.
    */
-  def executeTake(n: Int): Array[Row] = {
+  def executeTake(n: Int): Array[InternalRow] = {
     if (n == 0) {
-      return new Array[Row](0)
+      return new Array[InternalRow](0)
     }
 
     val childRDD = execute().map(_.copy())
@@ -218,8 +223,7 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
       partsScanned += numPartsToTry
     }
 
-    val converter = CatalystTypeConverters.createToScalaConverter(schema)
-    buf.toArray.map(converter(_).asInstanceOf[Row])
+    buf.toArray
   }
 
   private[this] def isTesting: Boolean = sys.props.contains("spark.testing")
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index bf6d44c098ee..3e49e0a35741 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -204,7 +204,7 @@ case class Limit(limit: Int, child: SparkPlan)
   override def output: Seq[Attribute] = child.output
   override def outputPartitioning: Partitioning = SinglePartition
 
-  override def executeCollect(): Array[Row] = child.executeTake(limit)
+  override def executeCollect(): Array[InternalRow] = child.executeTake(limit)
 
   protected override def doExecute(): RDD[InternalRow] = {
     val rdd: RDD[_ <: Product2[Boolean, InternalRow]] = if (sortBasedShuffleOn) {
@@ -258,9 +258,8 @@ case class TakeOrderedAndProject(
     projection.map(data.map(_)).getOrElse(data)
   }
 
-  override def executeCollect(): Array[Row] = {
-    val converter = CatalystTypeConverters.createToScalaConverter(schema)
-    collectData().map(converter(_).asInstanceOf[Row])
+  override def executeCollect(): Array[InternalRow] = {
+    collectData()
   }
 
   // TODO: Terminal split should be implemented differently from non-terminal split.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index af28e2dfa418..05ccc53830bd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -54,20 +54,21 @@ private[sql] case class ExecutedCommand(cmd: RunnableCommand) extends SparkPlan
    * The `execute()` method of all the physical command classes should reference `sideEffectResult`
    * so that the command can be executed eagerly right after the command query is created.
    */
-  protected[sql] lazy val sideEffectResult: Seq[Row] = cmd.run(sqlContext)
+  protected[sql] lazy val sideEffectResult: Seq[InternalRow] = {
+    val converter = CatalystTypeConverters.createToCatalystConverter(schema)
+    cmd.run(sqlContext).map(converter(_).asInstanceOf[InternalRow])
+  }
 
   override def output: Seq[Attribute] = cmd.output
 
   override def children: Seq[SparkPlan] = Nil
 
-  override def executeCollect(): Array[Row] = sideEffectResult.toArray
+  override def executeCollect(): Array[InternalRow] = sideEffectResult.toArray
 
-  override def executeTake(limit: Int): Array[Row] = sideEffectResult.take(limit).toArray
+  override def executeTake(limit: Int): Array[InternalRow] = sideEffectResult.take(limit).toArray
 
   protected override def doExecute(): RDD[InternalRow] = {
-    val convert = CatalystTypeConverters.createToCatalystConverter(schema)
-    val converted = sideEffectResult.map(convert(_).asInstanceOf[InternalRow])
-    sqlContext.sparkContext.parallelize(converted, 1)
+    sqlContext.sparkContext.parallelize(sideEffectResult, 1)
   }
 
   override def argString: String = cmd.toString
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
index d6aaf424a893..5dbe0fc5f95c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
@@ -121,12 +121,10 @@ object EvaluatePython {
 
   def takeAndServe(df: DataFrame, n: Int): Int = {
     registerPicklers()
-    // This is an annoying hack - we should refactor the code so executeCollect and executeTake
-    // returns InternalRow rather than Row.
-    val converter = CatalystTypeConverters.createToCatalystConverter(df.schema)
-    val iter = new SerDeUtil.AutoBatchedPickler(df.take(n).iterator.map { row =>
-      EvaluatePython.toJava(converter(row).asInstanceOf[InternalRow], df.schema)
-    })
+    val iter = new SerDeUtil.AutoBatchedPickler(
+      df.queryExecution.executedPlan.executeTake(n).iterator.map { row =>
+        EvaluatePython.toJava(row, df.schema)
+      })
     PythonRDD.serveIterator(iter, s"serve-DataFrame")
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/SparkPlanTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/SparkPlanTest.scala
index 3d218f01c9ea..8549a6a0f664 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/SparkPlanTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/SparkPlanTest.scala
@@ -245,7 +245,7 @@ object SparkPlanTest {
           }
       }
     )
-    resolvedPlan.executeCollect().toSeq
+    resolvedPlan.executeCollectPublic().toSeq
   }
 }
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c75025e79af4..17de8ef56f9a 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -563,7 +563,7 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
 
   /** Extends QueryExecution with hive specific features. */
   protected[sql] class QueryExecution(logicalPlan: LogicalPlan)
-    extends super.QueryExecution(logicalPlan) {
+    extends org.apache.spark.sql.execution.QueryExecution(this, logicalPlan) {
 
     /**
      * Returns the result as a hive compatible sequence of strings.  For native commands, the
@@ -581,10 +581,10 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
               .mkString("\t")
         }
       case command: ExecutedCommand =>
-        command.executeCollect().map(_(0).toString)
+        command.executeCollect().map(_.getString(0))
 
       case other =>
-        val result: Seq[Seq[Any]] = other.executeCollect().map(_.toSeq).toSeq
+        val result: Seq[Seq[Any]] = other.executeCollectPublic().map(_.toSeq).toSeq
         // We need the types so we can output struct field names
         val types = analyzed.output.map(_.dataType)
         // Reformat to match hive tab delimited output.
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/InsertIntoHiveTable.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/InsertIntoHiveTable.scala
index 0c700bdb370a..f936cf565b2b 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/InsertIntoHiveTable.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/InsertIntoHiveTable.scala
@@ -124,7 +124,7 @@ case class InsertIntoHiveTable(
    *
    * Note: this is run once and then kept to avoid double insertions.
    */
-  protected[sql] lazy val sideEffectResult: Seq[Row] = {
+  protected[sql] lazy val sideEffectResult: Seq[InternalRow] = {
     // Have to pass the TableDesc object to RDD.mapPartitions and then instantiate new serializer
     // instances within the closure, since Serializer is not serializable while TableDesc is.
     val tableDesc = table.tableDesc
@@ -267,10 +267,10 @@ case class InsertIntoHiveTable(
     // however for now we return an empty list to simplify compatibility checks with hive, which
     // does not return anything for insert operations.
     // TODO: implement hive compatibility as rules.
-    Seq.empty[Row]
+    Seq.empty[InternalRow]
   }
 
-  override def executeCollect(): Array[Row] = sideEffectResult.toArray
+  override def executeCollect(): Array[InternalRow] = sideEffectResult.toArray
 
   protected override def doExecute(): RDD[InternalRow] = {
     sqlContext.sparkContext.parallelize(sideEffectResult.asInstanceOf[Seq[InternalRow]], 1)

From 89ea0041ae5a701ce8d211ed08f1f059b7f9c396 Mon Sep 17 00:00:00 2001
From: Nathan Howell <nhowell@godaddy.com>
Date: Wed, 30 Sep 2015 15:33:12 -0700
Subject: [PATCH 123/896] [SPARK-9617] [SQL] Implement json_tuple

This is an implementation of Hive's `json_tuple` function using Jackson Streaming.

Author: Nathan Howell <nhowell@godaddy.com>

Closes #7946 from NathanHowell/SPARK-9617.
---
 .../catalyst/analysis/FunctionRegistry.scala  |   1 +
 .../expressions/jsonExpressions.scala         | 167 +++++++++++++++++-
 .../expressions/JsonExpressionsSuite.scala    | 114 ++++++++++++
 .../apache/spark/sql/JsonFunctionsSuite.scala |  38 ++++
 4 files changed, 316 insertions(+), 4 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index 11b4866bf264..e6122d92b763 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -184,6 +184,7 @@ object FunctionRegistry {
     expression[FormatNumber]("format_number"),
     expression[GetJsonObject]("get_json_object"),
     expression[InitCap]("initcap"),
+    expression[JsonTuple]("json_tuple"),
     expression[Lower]("lcase"),
     expression[Lower]("lower"),
     expression[Length]("length"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
index 23bfa18c9428..0770fab0ae90 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
@@ -21,8 +21,9 @@ import java.io.{StringWriter, ByteArrayOutputStream}
 
 import com.fasterxml.jackson.core._
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
-import org.apache.spark.sql.types.{StringType, DataType}
+import org.apache.spark.sql.types.{StructField, StructType, StringType, DataType}
 import org.apache.spark.unsafe.types.UTF8String
 
 import scala.util.parsing.combinator.RegexParsers
@@ -92,8 +93,8 @@ private[this] object JsonPathParser extends RegexParsers {
   }
 }
 
-private[this] object GetJsonObject {
-  private val jsonFactory = new JsonFactory()
+private[this] object SharedFactory {
+  val jsonFactory = new JsonFactory()
 
   // Enabled for Hive compatibility
   jsonFactory.enable(JsonParser.Feature.ALLOW_UNQUOTED_CONTROL_CHARS)
@@ -106,7 +107,7 @@ private[this] object GetJsonObject {
 case class GetJsonObject(json: Expression, path: Expression)
   extends BinaryExpression with ExpectsInputTypes with CodegenFallback {
 
-  import GetJsonObject._
+  import SharedFactory._
   import PathInstruction._
   import WriteStyle._
   import com.fasterxml.jackson.core.JsonToken._
@@ -307,3 +308,161 @@ case class GetJsonObject(json: Expression, path: Expression)
     }
   }
 }
+
+case class JsonTuple(children: Seq[Expression])
+  extends Expression with CodegenFallback {
+
+  import SharedFactory._
+
+  override def nullable: Boolean = {
+    // a row is always returned
+    false
+  }
+
+  // if processing fails this shared value will be returned
+  @transient private lazy val nullRow: InternalRow =
+    new GenericInternalRow(Array.ofDim[Any](fieldExpressions.length))
+
+  // the json body is the first child
+  @transient private lazy val jsonExpr: Expression = children.head
+
+  // the fields to query are the remaining children
+  @transient private lazy val fieldExpressions: Seq[Expression] = children.tail
+
+  // eagerly evaluate any foldable the field names
+  @transient private lazy val foldableFieldNames: IndexedSeq[String] = {
+    fieldExpressions.map {
+      case expr if expr.foldable => expr.eval().asInstanceOf[UTF8String].toString
+      case _ => null
+    }.toIndexedSeq
+  }
+
+  // and count the number of foldable fields, we'll use this later to optimize evaluation
+  @transient private lazy val constantFields: Int = foldableFieldNames.count(_ != null)
+
+  override lazy val dataType: StructType = {
+    val fields = fieldExpressions.zipWithIndex.map {
+      case (_, idx) => StructField(
+        name = s"c$idx", // mirroring GenericUDTFJSONTuple.initialize
+        dataType = StringType,
+        nullable = true)
+    }
+
+    StructType(fields)
+  }
+
+  override def prettyName: String = "json_tuple"
+
+  override def checkInputDataTypes(): TypeCheckResult = {
+    if (children.length < 2) {
+      TypeCheckResult.TypeCheckFailure(s"$prettyName requires at least two arguments")
+    } else if (children.forall(child => StringType.acceptsType(child.dataType))) {
+      TypeCheckResult.TypeCheckSuccess
+    } else {
+      TypeCheckResult.TypeCheckFailure(s"$prettyName requires that all arguments are strings")
+    }
+  }
+
+  override def eval(input: InternalRow): InternalRow = {
+    val json = jsonExpr.eval(input).asInstanceOf[UTF8String]
+    if (json == null) {
+      return nullRow
+    }
+
+    try {
+      val parser = jsonFactory.createParser(json.getBytes)
+
+      try {
+        parseRow(parser, input)
+      } finally {
+        parser.close()
+      }
+    } catch {
+      case _: JsonProcessingException =>
+        nullRow
+    }
+  }
+
+  private def parseRow(parser: JsonParser, input: InternalRow): InternalRow = {
+    // only objects are supported
+    if (parser.nextToken() != JsonToken.START_OBJECT) {
+      return nullRow
+    }
+
+    // evaluate the field names as String rather than UTF8String to
+    // optimize lookups from the json token, which is also a String
+    val fieldNames = if (constantFields == fieldExpressions.length) {
+      // typically the user will provide the field names as foldable expressions
+      // so we can use the cached copy
+      foldableFieldNames
+    } else if (constantFields == 0) {
+      // none are foldable so all field names need to be evaluated from the input row
+      fieldExpressions.map(_.eval(input).asInstanceOf[UTF8String].toString)
+    } else {
+      // if there is a mix of constant and non-constant expressions
+      // prefer the cached copy when available
+      foldableFieldNames.zip(fieldExpressions).map {
+        case (null, expr) => expr.eval(input).asInstanceOf[UTF8String].toString
+        case (fieldName, _) => fieldName
+      }
+    }
+
+    val row = Array.ofDim[Any](fieldNames.length)
+
+    // start reading through the token stream, looking for any requested field names
+    while (parser.nextToken() != JsonToken.END_OBJECT) {
+      if (parser.getCurrentToken == JsonToken.FIELD_NAME) {
+        // check to see if this field is desired in the output
+        val idx = fieldNames.indexOf(parser.getCurrentName)
+        if (idx >= 0) {
+          // it is, copy the child tree to the correct location in the output row
+          val output = new ByteArrayOutputStream()
+
+          // write the output directly to UTF8 encoded byte array
+          if (parser.nextToken() != JsonToken.VALUE_NULL) {
+            val generator = jsonFactory.createGenerator(output, JsonEncoding.UTF8)
+
+            try {
+              copyCurrentStructure(generator, parser)
+            } finally {
+              generator.close()
+            }
+
+            row(idx) = UTF8String.fromBytes(output.toByteArray)
+          }
+        }
+      }
+
+      // always skip children, it's cheap enough to do even if copyCurrentStructure was called
+      parser.skipChildren()
+    }
+
+    new GenericInternalRow(row)
+  }
+
+  private def copyCurrentStructure(generator: JsonGenerator, parser: JsonParser): Unit = {
+    parser.getCurrentToken match {
+      // if the user requests a string field it needs to be returned without enclosing
+      // quotes which is accomplished via JsonGenerator.writeRaw instead of JsonGenerator.write
+      case JsonToken.VALUE_STRING if parser.hasTextCharacters =>
+        // slight optimization to avoid allocating a String instance, though the characters
+        // still have to be decoded... Jackson doesn't have a way to access the raw bytes
+        generator.writeRaw(parser.getTextCharacters, parser.getTextOffset, parser.getTextLength)
+
+      case JsonToken.VALUE_STRING =>
+        // the normal String case, pass it through to the output without enclosing quotes
+        generator.writeRaw(parser.getText)
+
+      case JsonToken.VALUE_NULL =>
+        // a special case that needs to be handled outside of this method.
+        // if a requested field is null, the result must be null. the easiest
+        // way to achieve this is just by ignoring null tokens entirely
+        throw new IllegalStateException("Do not attempt to copy a null field")
+
+      case _ =>
+        // handle other types including objects, arrays, booleans and numbers
+        generator.copyCurrentStructure(parser)
+    }
+  }
+}
+
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
index 4addbaf0cbce..f33125f463e1 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
@@ -18,6 +18,8 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.unsafe.types.UTF8String
 
 class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   val json =
@@ -199,4 +201,116 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
       GetJsonObject(NonFoldableLiteral(json), NonFoldableLiteral("$.fb:testid")),
       "1234")
   }
+
+  val jsonTupleQuery = Literal("f1") ::
+    Literal("f2") ::
+    Literal("f3") ::
+    Literal("f4") ::
+    Literal("f5") ::
+    Nil
+
+  test("json_tuple - hive key 1") {
+    checkEvaluation(
+      JsonTuple(
+        Literal("""{"f1": "value1", "f2": "value2", "f3": 3, "f5": 5.23}""") ::
+          jsonTupleQuery),
+      InternalRow.fromSeq(Seq("value1", "value2", "3", null, "5.23").map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 2") {
+    checkEvaluation(
+      JsonTuple(
+        Literal("""{"f1": "value12", "f3": "value3", "f2": 2, "f4": 4.01}""") ::
+          jsonTupleQuery),
+      InternalRow.fromSeq(Seq("value12", "2", "value3", "4.01", null).map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 2 (mix of foldable fields)") {
+    checkEvaluation(
+      JsonTuple(Literal("""{"f1": "value12", "f3": "value3", "f2": 2, "f4": 4.01}""") ::
+        Literal("f1") ::
+        NonFoldableLiteral("f2") ::
+        NonFoldableLiteral("f3") ::
+        Literal("f4") ::
+        Literal("f5") ::
+        Nil),
+      InternalRow.fromSeq(Seq("value12", "2", "value3", "4.01", null).map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 3") {
+    checkEvaluation(
+      JsonTuple(
+        Literal("""{"f1": "value13", "f4": "value44", "f3": "value33", "f2": 2, "f5": 5.01}""") ::
+          jsonTupleQuery),
+      InternalRow.fromSeq(
+        Seq("value13", "2", "value33", "value44", "5.01").map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 3 (nonfoldable json)") {
+    checkEvaluation(
+      JsonTuple(
+        NonFoldableLiteral(
+          """{"f1": "value13", "f4": "value44",
+            | "f3": "value33", "f2": 2, "f5": 5.01}""".stripMargin)
+          :: jsonTupleQuery),
+      InternalRow.fromSeq(
+        Seq("value13", "2", "value33", "value44", "5.01").map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 3 (nonfoldable fields)") {
+    checkEvaluation(
+      JsonTuple(Literal(
+        """{"f1": "value13", "f4": "value44",
+          | "f3": "value33", "f2": 2, "f5": 5.01}""".stripMargin) ::
+        NonFoldableLiteral("f1") ::
+        NonFoldableLiteral("f2") ::
+        NonFoldableLiteral("f3") ::
+        NonFoldableLiteral("f4") ::
+        NonFoldableLiteral("f5") ::
+        Nil),
+      InternalRow.fromSeq(
+        Seq("value13", "2", "value33", "value44", "5.01").map(UTF8String.fromString)))
+  }
+
+  test("json_tuple - hive key 4 - null json") {
+    checkEvaluation(
+      JsonTuple(Literal(null) :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(null, null, null, null, null)))
+  }
+
+  test("json_tuple - hive key 5 - null and empty fields") {
+    checkEvaluation(
+      JsonTuple(Literal("""{"f1": "", "f5": null}""") :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(UTF8String.fromString(""), null, null, null, null)))
+  }
+
+  test("json_tuple - hive key 6 - invalid json (array)") {
+    checkEvaluation(
+      JsonTuple(Literal("[invalid JSON string]") :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(null, null, null, null, null)))
+  }
+
+  test("json_tuple - invalid json (object start only)") {
+    checkEvaluation(
+      JsonTuple(Literal("{") :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(null, null, null, null, null)))
+  }
+
+  test("json_tuple - invalid json (no object end)") {
+    checkEvaluation(
+      JsonTuple(Literal("""{"foo": "bar"""") :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(null, null, null, null, null)))
+  }
+
+  test("json_tuple - invalid json (invalid json)") {
+    checkEvaluation(
+      JsonTuple(Literal("\\") :: jsonTupleQuery),
+      InternalRow.fromSeq(Seq(null, null, null, null, null)))
+  }
+
+  test("json_tuple - preserve newlines") {
+    checkEvaluation(
+      JsonTuple(Literal("{\"a\":\"b\nc\"}") :: Literal("a") :: Nil),
+      InternalRow.fromSeq(Seq(UTF8String.fromString("b\nc"))))
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
index 045fea82e4c8..e3531d0d6d79 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
@@ -29,4 +29,42 @@ class JsonFunctionsSuite extends QueryTest with SharedSQLContext {
       Row("alice", "5"))
   }
 
+
+  val tuples: Seq[(String, String)] =
+    ("1", """{"f1": "value1", "f2": "value2", "f3": 3, "f5": 5.23}""") ::
+    ("2", """{"f1": "value12", "f3": "value3", "f2": 2, "f4": 4.01}""") ::
+    ("3", """{"f1": "value13", "f4": "value44", "f3": "value33", "f2": 2, "f5": 5.01}""") ::
+    ("4", null) ::
+    ("5", """{"f1": "", "f5": null}""") ::
+    ("6", "[invalid JSON string]") ::
+    Nil
+
+  test("json_tuple select") {
+    val df: DataFrame = tuples.toDF("key", "jstring")
+    val expected = Row("1", Row("value1", "value2", "3", null, "5.23")) ::
+      Row("2", Row("value12", "2", "value3", "4.01", null)) ::
+      Row("3", Row("value13", "2", "value33", "value44", "5.01")) ::
+      Row("4", Row(null, null, null, null, null)) ::
+      Row("5", Row("", null, null, null, null)) ::
+      Row("6", Row(null, null, null, null, null)) ::
+      Nil
+
+    checkAnswer(df.selectExpr("key", "json_tuple(jstring, 'f1', 'f2', 'f3', 'f4', 'f5')"), expected)
+  }
+
+  test("json_tuple filter and group") {
+    val df: DataFrame = tuples.toDF("key", "jstring")
+    val expr = df
+      .selectExpr("json_tuple(jstring, 'f1', 'f2') as jt")
+      .where($"jt.c0".isNotNull)
+      .groupBy($"jt.c1")
+      .count()
+
+    val expected = Row(null, 1) ::
+      Row("2", 2) ::
+      Row("value2", 1) ::
+      Nil
+
+    checkAnswer(expr, expected)
+  }
 }

From f21e2da03fbf8041fece476e3d5c699aef819451 Mon Sep 17 00:00:00 2001
From: "Oscar D. Lara Yejas" <olarayej@mail.usf.edu>
Date: Wed, 30 Sep 2015 18:03:31 -0700
Subject: [PATCH 124/896] [SPARK-10807] [SPARKR] Added as.data.frame as a
 synonym for collect

Created method as.data.frame as a synonym for collect().

Author: Oscar D. Lara Yejas <olarayej@mail.usf.edu>
Author: olarayej <oscar.lara.yejas@us.ibm.com>
Author: Oscar D. Lara Yejas <oscar.lara.yejas@us.ibm.com>

Closes #8908 from olarayej/SPARK-10807.
---
 R/pkg/NAMESPACE                  |  2 ++
 R/pkg/R/DataFrame.R              | 25 +++++++++++++++++++++++++
 R/pkg/R/generics.R               |  4 ++++
 R/pkg/inst/tests/test_sparkSQL.R |  9 ++++++++-
 4 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 9d3963070643..c28c47daeac1 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -247,3 +247,5 @@ export("structField",
        "structType.jobj",
        "structType.structField",
        "print.structType")
+
+export("as.data.frame")
\ No newline at end of file
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index c3c189348733..65e368c47dd8 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1848,3 +1848,28 @@ setMethod("crosstab",
             sct <- callJMethod(statFunctions, "crosstab", col1, col2)
             collect(dataFrame(sct))
           })
+
+
+#' This function downloads the contents of a DataFrame into an R's data.frame.
+#' Since data.frames are held in memory, ensure that you have enough memory
+#' in your system to accommodate the contents.
+#' 
+#' @title Download data from a DataFrame into a data.frame
+#' @param x a DataFrame
+#' @return a data.frame
+#' @rdname as.data.frame
+#' @examples \dontrun{
+#' 
+#' irisDF <- createDataFrame(sqlContext, iris)
+#' df <- as.data.frame(irisDF[irisDF$Species == "setosa", ])
+#' }
+setMethod("as.data.frame",
+          signature(x = "DataFrame"),
+          function(x, ...) {
+            # Check if additional parameters have been passed
+            if (length(list(...)) > 0) {
+              stop(paste("Unused argument(s): ", paste(list(...), collapse=", ")))
+            }
+            collect(x)
+          }
+)
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 43dd8d283ab6..3db41e0fe2bb 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -983,3 +983,7 @@ setGeneric("glm")
 #' @rdname rbind
 #' @export
 setGeneric("rbind", signature = "...")
+
+#' @rdname as.data.frame
+#' @export
+setGeneric("as.data.frame")
\ No newline at end of file
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index e159a6958427..8f85eecbc4a9 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1327,6 +1327,13 @@ test_that("SQL error message is returned from JVM", {
   expect_equal(grepl("Table Not Found: blah", retError), TRUE)
 })
 
+test_that("Method as.data.frame as a synonym for collect()", {
+  irisDF <- createDataFrame(sqlContext, iris)
+  expect_equal(as.data.frame(irisDF), collect(irisDF))
+  irisDF2 <- irisDF[irisDF$Species == "setosa", ]
+  expect_equal(as.data.frame(irisDF2), collect(irisDF2))
+})
+
 unlink(parquetPath)
 unlink(jsonPath)
-unlink(jsonPathNa)
+unlink(jsonPathNa)
\ No newline at end of file

From 9b3e7768a27d51ddd4711c4a68a428a6875bd6d7 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Thu, 1 Oct 2015 07:09:31 -0700
Subject: [PATCH 125/896] [SPARK-10058] [CORE] [TESTS] Fix the flaky tests in
 HeartbeatReceiverSuite

Fixed the test failure here: https://amplab.cs.berkeley.edu/jenkins/view/Spark-QA-Test/job/Spark-1.5-SBT/116/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.2,label=spark-test/testReport/junit/org.apache.spark/HeartbeatReceiverSuite/normal_heartbeat/

This failure is because `HeartbeatReceiverSuite. heartbeatReceiver` may receive `SparkListenerExecutorAdded("driver")` sent from [LocalBackend](https://github.com/apache/spark/blob/8fb3a65cbb714120d612e58ef9d12b0521a83260/core/src/main/scala/org/apache/spark/scheduler/local/LocalBackend.scala#L121).

There are other race conditions in `HeartbeatReceiverSuite` because `HeartbeatReceiver.onExecutorAdded` and `HeartbeatReceiver.onExecutorRemoved` are asynchronous. This PR also fixed them.

Author: zsxwing <zsxwing@gmail.com>

Closes #8946 from zsxwing/SPARK-10058.
---
 .../org/apache/spark/HeartbeatReceiver.scala  | 25 ++++++++-
 .../apache/spark/HeartbeatReceiverSuite.scala | 51 ++++++++++++++-----
 2 files changed, 60 insertions(+), 16 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala b/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
index ee60d697d879..1f1f0b75de5f 100644
--- a/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
+++ b/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
@@ -20,6 +20,7 @@ package org.apache.spark
 import java.util.concurrent.{ScheduledFuture, TimeUnit}
 
 import scala.collection.mutable
+import scala.concurrent.Future
 
 import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.rpc.{ThreadSafeRpcEndpoint, RpcEnv, RpcCallContext}
@@ -147,11 +148,31 @@ private[spark] class HeartbeatReceiver(sc: SparkContext, clock: Clock)
       }
   }
 
+  /**
+   * Send ExecutorRegistered to the event loop to add a new executor. Only for test.
+   *
+   * @return if HeartbeatReceiver is stopped, return None. Otherwise, return a Some(Future) that
+   *         indicate if this operation is successful.
+   */
+  def addExecutor(executorId: String): Option[Future[Boolean]] = {
+    Option(self).map(_.ask[Boolean](ExecutorRegistered(executorId)))
+  }
+
   /**
    * If the heartbeat receiver is not stopped, notify it of executor registrations.
    */
   override def onExecutorAdded(executorAdded: SparkListenerExecutorAdded): Unit = {
-    Option(self).foreach(_.ask[Boolean](ExecutorRegistered(executorAdded.executorId)))
+    addExecutor(executorAdded.executorId)
+  }
+
+  /**
+   * Send ExecutorRemoved to the event loop to remove a executor. Only for test.
+   *
+   * @return if HeartbeatReceiver is stopped, return None. Otherwise, return a Some(Future) that
+   *         indicate if this operation is successful.
+   */
+  def removeExecutor(executorId: String): Option[Future[Boolean]] = {
+    Option(self).map(_.ask[Boolean](ExecutorRemoved(executorId)))
   }
 
   /**
@@ -165,7 +186,7 @@ private[spark] class HeartbeatReceiver(sc: SparkContext, clock: Clock)
    * and expire it with loud error messages.
    */
   override def onExecutorRemoved(executorRemoved: SparkListenerExecutorRemoved): Unit = {
-    Option(self).foreach(_.ask[Boolean](ExecutorRemoved(executorRemoved.executorId)))
+    removeExecutor(executorRemoved.executorId)
   }
 
   private def expireDeadHosts(): Unit = {
diff --git a/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala b/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
index 139b8dc25f4b..18f2229fea39 100644
--- a/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
+++ b/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
@@ -19,7 +19,10 @@ package org.apache.spark
 
 import java.util.concurrent.{ExecutorService, TimeUnit}
 
+import scala.collection.Map
 import scala.collection.mutable
+import scala.concurrent.Await
+import scala.concurrent.duration._
 import scala.language.postfixOps
 
 import org.scalatest.{BeforeAndAfterEach, PrivateMethodTester}
@@ -96,18 +99,18 @@ class HeartbeatReceiverSuite
 
   test("normal heartbeat") {
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId1, null))
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId2, null))
+    addExecutorAndVerify(executorId1)
+    addExecutorAndVerify(executorId2)
     triggerHeartbeat(executorId1, executorShouldReregister = false)
     triggerHeartbeat(executorId2, executorShouldReregister = false)
-    val trackedExecutors = heartbeatReceiver.invokePrivate(_executorLastSeen())
+    val trackedExecutors = getTrackedExecutors
     assert(trackedExecutors.size === 2)
     assert(trackedExecutors.contains(executorId1))
     assert(trackedExecutors.contains(executorId2))
   }
 
   test("reregister if scheduler is not ready yet") {
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId1, null))
+    addExecutorAndVerify(executorId1)
     // Task scheduler is not set yet in HeartbeatReceiver, so executors should reregister
     triggerHeartbeat(executorId1, executorShouldReregister = true)
   }
@@ -116,20 +119,20 @@ class HeartbeatReceiverSuite
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
     // Received heartbeat from unknown executor, so we ask it to re-register
     triggerHeartbeat(executorId1, executorShouldReregister = true)
-    assert(heartbeatReceiver.invokePrivate(_executorLastSeen()).isEmpty)
+    assert(getTrackedExecutors.isEmpty)
   }
 
   test("reregister if heartbeat from removed executor") {
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId1, null))
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId2, null))
+    addExecutorAndVerify(executorId1)
+    addExecutorAndVerify(executorId2)
     // Remove the second executor but not the first
-    heartbeatReceiver.onExecutorRemoved(SparkListenerExecutorRemoved(0, executorId2, "bad boy"))
+    removeExecutorAndVerify(executorId2)
     // Now trigger the heartbeats
     // A heartbeat from the second executor should require reregistering
     triggerHeartbeat(executorId1, executorShouldReregister = false)
     triggerHeartbeat(executorId2, executorShouldReregister = true)
-    val trackedExecutors = heartbeatReceiver.invokePrivate(_executorLastSeen())
+    val trackedExecutors = getTrackedExecutors
     assert(trackedExecutors.size === 1)
     assert(trackedExecutors.contains(executorId1))
     assert(!trackedExecutors.contains(executorId2))
@@ -138,8 +141,8 @@ class HeartbeatReceiverSuite
   test("expire dead hosts") {
     val executorTimeout = heartbeatReceiver.invokePrivate(_executorTimeoutMs())
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId1, null))
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId2, null))
+    addExecutorAndVerify(executorId1)
+    addExecutorAndVerify(executorId2)
     triggerHeartbeat(executorId1, executorShouldReregister = false)
     triggerHeartbeat(executorId2, executorShouldReregister = false)
     // Advance the clock and only trigger a heartbeat for the first executor
@@ -149,7 +152,7 @@ class HeartbeatReceiverSuite
     heartbeatReceiverRef.askWithRetry[Boolean](ExpireDeadHosts)
     // Only the second executor should be expired as a dead host
     verify(scheduler).executorLost(Matchers.eq(executorId2), any())
-    val trackedExecutors = heartbeatReceiver.invokePrivate(_executorLastSeen())
+    val trackedExecutors = getTrackedExecutors
     assert(trackedExecutors.size === 1)
     assert(trackedExecutors.contains(executorId1))
     assert(!trackedExecutors.contains(executorId2))
@@ -175,8 +178,8 @@ class HeartbeatReceiverSuite
     fakeSchedulerBackend.driverEndpoint.askWithRetry[RegisteredExecutor.type](
       RegisterExecutor(executorId2, dummyExecutorEndpointRef2, "dummy:4040", 0, Map.empty))
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId1, null))
-    heartbeatReceiver.onExecutorAdded(SparkListenerExecutorAdded(0, executorId2, null))
+    addExecutorAndVerify(executorId1)
+    addExecutorAndVerify(executorId2)
     triggerHeartbeat(executorId1, executorShouldReregister = false)
     triggerHeartbeat(executorId2, executorShouldReregister = false)
 
@@ -222,6 +225,26 @@ class HeartbeatReceiverSuite
     }
   }
 
+  private def addExecutorAndVerify(executorId: String): Unit = {
+    assert(
+      heartbeatReceiver.addExecutor(executorId).map { f =>
+        Await.result(f, 10.seconds)
+      } === Some(true))
+  }
+
+  private def removeExecutorAndVerify(executorId: String): Unit = {
+    assert(
+      heartbeatReceiver.removeExecutor(executorId).map { f =>
+        Await.result(f, 10.seconds)
+      } === Some(true))
+  }
+
+  private def getTrackedExecutors: Map[String, Long] = {
+    // We may receive undesired SparkListenerExecutorAdded from LocalBackend, so exclude it from
+    // the map. See SPARK-10800.
+    heartbeatReceiver.invokePrivate(_executorLastSeen()).
+      filterKeys(_ != SparkContext.DRIVER_IDENTIFIER)
+  }
 }
 
 // TODO: use these classes to add end-to-end tests for dynamic allocation!

From 4d8c7c6d1c973f07e210e27936b063b5a763e9a3 Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Thu, 1 Oct 2015 11:48:15 -0700
Subject: [PATCH 126/896] [SPARK-10865] [SPARK-10866] [SQL] Fix bug of
 ceil/floor, which should returns long instead of the Double type

Floor & Ceiling function should returns Long type, rather than Double.

Verified with MySQL & Hive.

Author: Cheng Hao <hao.cheng@intel.com>

Closes #8933 from chenghao-intel/ceiling.
---
 .../expressions/mathExpressions.scala         | 24 ++++++++++++++++---
 .../expressions/MathFunctionsSuite.scala      |  4 ++--
 .../spark/sql/MathExpressionsSuite.scala      | 14 ++++++-----
 3 files changed, 31 insertions(+), 11 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
index 15ceb9193a8c..39de0e8f448d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
@@ -52,7 +52,7 @@ abstract class LeafMathExpression(c: Double, name: String)
  * @param f The math function.
  * @param name The short name of the function
  */
-abstract class UnaryMathExpression(f: Double => Double, name: String)
+abstract class UnaryMathExpression(val f: Double => Double, name: String)
   extends UnaryExpression with Serializable with ImplicitCastInputTypes {
 
   override def inputTypes: Seq[DataType] = Seq(DoubleType)
@@ -152,7 +152,16 @@ case class Atan(child: Expression) extends UnaryMathExpression(math.atan, "ATAN"
 
 case class Cbrt(child: Expression) extends UnaryMathExpression(math.cbrt, "CBRT")
 
-case class Ceil(child: Expression) extends UnaryMathExpression(math.ceil, "CEIL")
+case class Ceil(child: Expression) extends UnaryMathExpression(math.ceil, "CEIL") {
+  override def dataType: DataType = LongType
+  protected override def nullSafeEval(input: Any): Any = {
+    f(input.asInstanceOf[Double]).toLong
+  }
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+  }
+}
 
 case class Cos(child: Expression) extends UnaryMathExpression(math.cos, "COS")
 
@@ -195,7 +204,16 @@ case class Exp(child: Expression) extends UnaryMathExpression(math.exp, "EXP")
 
 case class Expm1(child: Expression) extends UnaryMathExpression(math.expm1, "EXPM1")
 
-case class Floor(child: Expression) extends UnaryMathExpression(math.floor, "FLOOR")
+case class Floor(child: Expression) extends UnaryMathExpression(math.floor, "FLOOR") {
+  override def dataType: DataType = LongType
+  protected override def nullSafeEval(input: Any): Any = {
+    f(input.asInstanceOf[Double]).toLong
+  }
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+  }
+}
 
 object Factorial {
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
index 90c59f240b54..1b2a9163a3d0 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
@@ -244,12 +244,12 @@ class MathFunctionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("ceil") {
-    testUnary(Ceil, math.ceil)
+    testUnary(Ceil, (d: Double) => math.ceil(d).toLong)
     checkConsistencyBetweenInterpretedAndCodegen(Ceil, DoubleType)
   }
 
   test("floor") {
-    testUnary(Floor, math.floor)
+    testUnary(Floor, (d: Double) => math.floor(d).toLong)
     checkConsistencyBetweenInterpretedAndCodegen(Floor, DoubleType)
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/MathExpressionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/MathExpressionsSuite.scala
index 30289c3c1d09..58f982c2bc93 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/MathExpressionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/MathExpressionsSuite.scala
@@ -37,9 +37,11 @@ class MathExpressionsSuite extends QueryTest with SharedSQLContext {
   private lazy val nullDoubles =
     Seq(NullDoubles(1.0), NullDoubles(2.0), NullDoubles(3.0), NullDoubles(null)).toDF()
 
-  private def testOneToOneMathFunction[@specialized(Int, Long, Float, Double) T](
+  private def testOneToOneMathFunction[
+  @specialized(Int, Long, Float, Double) T,
+  @specialized(Int, Long, Float, Double) U](
       c: Column => Column,
-      f: T => T): Unit = {
+      f: T => U): Unit = {
     checkAnswer(
       doubleData.select(c('a)),
       (1 to 10).map(n => Row(f((n * 0.2 - 1).asInstanceOf[T])))
@@ -165,10 +167,10 @@ class MathExpressionsSuite extends QueryTest with SharedSQLContext {
   }
 
   test("ceil and ceiling") {
-    testOneToOneMathFunction(ceil, math.ceil)
+    testOneToOneMathFunction(ceil, (d: Double) => math.ceil(d).toLong)
     checkAnswer(
       sql("SELECT ceiling(0), ceiling(1), ceiling(1.5)"),
-      Row(0.0, 1.0, 2.0))
+      Row(0L, 1L, 2L))
   }
 
   test("conv") {
@@ -184,7 +186,7 @@ class MathExpressionsSuite extends QueryTest with SharedSQLContext {
   }
 
   test("floor") {
-    testOneToOneMathFunction(floor, math.floor)
+    testOneToOneMathFunction(floor, (d: Double) => math.floor(d).toLong)
   }
 
   test("factorial") {
@@ -228,7 +230,7 @@ class MathExpressionsSuite extends QueryTest with SharedSQLContext {
   }
 
   test("signum / sign") {
-    testOneToOneMathFunction[Double](signum, math.signum)
+    testOneToOneMathFunction[Double, Double](signum, math.signum)
 
     checkAnswer(
       sql("SELECT sign(10), signum(-11)"),

From 02026a8132a2e6fe3be97b33b49826139cd1312e Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Thu, 1 Oct 2015 13:23:59 -0700
Subject: [PATCH 127/896] [SPARK-10671] [SQL] Throws an analysis exception if
 we cannot find Hive UDFs

Takes over https://github.com/apache/spark/pull/8800

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8941 from cloud-fan/hive-udf.
---
 .../org/apache/spark/sql/hive/hiveUDFs.scala  | 68 +++++++++++++------
 .../sql/hive/execution/HiveUDFSuite.scala     | 59 +++++++++++++++-
 2 files changed, 104 insertions(+), 23 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index fa9012b96edd..a85d4db88d7e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -60,20 +60,36 @@ private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
 
       val functionClassName = functionInfo.getFunctionClass.getName
 
-      if (classOf[UDF].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveSimpleUDF(new HiveFunctionWrapper(functionClassName), children)
-      } else if (classOf[GenericUDF].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveGenericUDF(new HiveFunctionWrapper(functionClassName), children)
-      } else if (
-        classOf[AbstractGenericUDAFResolver].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveUDAFFunction(new HiveFunctionWrapper(functionClassName), children)
-      } else if (classOf[UDAF].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveUDAFFunction(
-          new HiveFunctionWrapper(functionClassName), children, isUDAFBridgeRequired = true)
-      } else if (classOf[GenericUDTF].isAssignableFrom(functionInfo.getFunctionClass)) {
-        HiveGenericUDTF(new HiveFunctionWrapper(functionClassName), children)
-      } else {
-        sys.error(s"No handler for udf ${functionInfo.getFunctionClass}")
+      // When we instantiate hive UDF wrapper class, we may throw exception if the input expressions
+      // don't satisfy the hive UDF, such as type mismatch, input number mismatch, etc. Here we
+      // catch the exception and throw AnalysisException instead.
+      try {
+        if (classOf[UDF].isAssignableFrom(functionInfo.getFunctionClass)) {
+          HiveSimpleUDF(new HiveFunctionWrapper(functionClassName), children)
+        } else if (classOf[GenericUDF].isAssignableFrom(functionInfo.getFunctionClass)) {
+          HiveGenericUDF(new HiveFunctionWrapper(functionClassName), children)
+        } else if (
+          classOf[AbstractGenericUDAFResolver].isAssignableFrom(functionInfo.getFunctionClass)) {
+          HiveUDAFFunction(new HiveFunctionWrapper(functionClassName), children)
+        } else if (classOf[UDAF].isAssignableFrom(functionInfo.getFunctionClass)) {
+          HiveUDAFFunction(
+            new HiveFunctionWrapper(functionClassName), children, isUDAFBridgeRequired = true)
+        } else if (classOf[GenericUDTF].isAssignableFrom(functionInfo.getFunctionClass)) {
+          val udtf = HiveGenericUDTF(new HiveFunctionWrapper(functionClassName), children)
+          udtf.elementTypes // Force it to check input data types.
+          udtf
+        } else {
+          throw new AnalysisException(s"No handler for udf ${functionInfo.getFunctionClass}")
+        }
+      } catch {
+        case analysisException: AnalysisException =>
+          // If the exception is an AnalysisException, just throw it.
+          throw analysisException
+        case throwable: Throwable =>
+          // If there is any other error, we throw an AnalysisException.
+          val errorMessage = s"No handler for Hive udf ${functionInfo.getFunctionClass} " +
+            s"because: ${throwable.getMessage}."
+          throw new AnalysisException(errorMessage)
       }
     }
   }
@@ -134,7 +150,7 @@ private[hive] case class HiveSimpleUDF(funcWrapper: HiveFunctionWrapper, childre
   @transient
   private lazy val conversionHelper = new ConversionHelper(method, arguments)
 
-  val dataType = javaClassToDataType(method.getReturnType)
+  override val dataType = javaClassToDataType(method.getReturnType)
 
   @transient
   lazy val returnInspector = ObjectInspectorFactory.getReflectionObjectInspector(
@@ -205,7 +221,7 @@ private[hive] case class HiveGenericUDF(funcWrapper: HiveFunctionWrapper, childr
     new DeferredObjectAdapter(inspect, child.dataType)
   }.toArray[DeferredObject]
 
-  lazy val dataType: DataType = inspectorToDataType(returnInspector)
+  override val dataType: DataType = inspectorToDataType(returnInspector)
 
   override def eval(input: InternalRow): Any = {
     returnInspector // Make sure initialized.
@@ -231,6 +247,12 @@ private[hive] case class HiveGenericUDF(funcWrapper: HiveFunctionWrapper, childr
  * Resolves [[UnresolvedWindowFunction]] to [[HiveWindowFunction]].
  */
 private[spark] object ResolveHiveWindowFunction extends Rule[LogicalPlan] {
+  private def shouldResolveFunction(
+      unresolvedWindowFunction: UnresolvedWindowFunction,
+      windowSpec: WindowSpecDefinition): Boolean = {
+    unresolvedWindowFunction.childrenResolved && windowSpec.childrenResolved
+  }
+
   def apply(plan: LogicalPlan): LogicalPlan = plan transformUp {
     case p: LogicalPlan if !p.childrenResolved => p
 
@@ -238,9 +260,11 @@ private[spark] object ResolveHiveWindowFunction extends Rule[LogicalPlan] {
     // replaced those WindowSpecReferences.
     case p: LogicalPlan =>
       p transformExpressions {
+        // We will not start to resolve the function unless all arguments are resolved
+        // and all expressions in window spec are fixed.
         case WindowExpression(
-          UnresolvedWindowFunction(name, children),
-          windowSpec: WindowSpecDefinition) =>
+          u @ UnresolvedWindowFunction(name, children),
+          windowSpec: WindowSpecDefinition) if shouldResolveFunction(u, windowSpec) =>
           // First, let's find the window function info.
           val windowFunctionInfo: WindowFunctionInfo =
             Option(FunctionRegistry.getWindowFunctionInfo(name.toLowerCase)).getOrElse(
@@ -256,7 +280,7 @@ private[spark] object ResolveHiveWindowFunction extends Rule[LogicalPlan] {
             // are expressions in Order By clause.
             if (classOf[GenericUDAFRank].isAssignableFrom(functionClass)) {
               if (children.nonEmpty) {
-               throw  new AnalysisException(s"$name does not take input parameters.")
+               throw new AnalysisException(s"$name does not take input parameters.")
               }
               windowSpec.orderSpec.map(_.child)
             } else {
@@ -358,7 +382,7 @@ private[hive] case class HiveWindowFunction(
     evaluator.init(GenericUDAFEvaluator.Mode.COMPLETE, inputInspectors)
   }
 
-  override def dataType: DataType =
+  override val dataType: DataType =
     if (!pivotResult) {
       inspectorToDataType(returnInspector)
     } else {
@@ -478,7 +502,7 @@ private[hive] case class HiveGenericUDTF(
   @transient
   protected lazy val collector = new UDTFCollector
 
-  lazy val elementTypes = outputInspector.getAllStructFieldRefs.asScala.map {
+  override lazy val elementTypes = outputInspector.getAllStructFieldRefs.asScala.map {
     field => (inspectorToDataType(field.getFieldObjectInspector), true)
   }
 
@@ -602,6 +626,6 @@ private[hive] case class HiveUDAFFunction(
 
   override def supportsPartial: Boolean = false
 
-  override lazy val dataType: DataType = inspectorToDataType(returnInspector)
+  override val dataType: DataType = inspectorToDataType(returnInspector)
 }
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
index 3c8a0091c83e..5f9a447759b4 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
@@ -21,7 +21,8 @@ import java.io.{DataInput, DataOutput}
 import java.util.{ArrayList, Arrays, Properties}
 
 import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.hive.ql.udf.generic.{GenericUDAFAverage, GenericUDF}
+import org.apache.hadoop.hive.ql.udf.UDAFPercentile
+import org.apache.hadoop.hive.ql.udf.generic.{GenericUDFOPAnd, GenericUDTFExplode, GenericUDAFAverage, GenericUDF}
 import org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject
 import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory
 import org.apache.hadoop.hive.serde2.objectinspector.{ObjectInspector, ObjectInspectorFactory}
@@ -299,6 +300,62 @@ class HiveUDFSuite extends QueryTest with TestHiveSingleton {
 
     hiveContext.reset()
   }
+
+  test("Hive UDFs with insufficient number of input arguments should trigger an analysis error") {
+    Seq((1, 2)).toDF("a", "b").registerTempTable("testUDF")
+
+    {
+      // HiveSimpleUDF
+      sql(s"CREATE TEMPORARY FUNCTION testUDFTwoListList AS '${classOf[UDFTwoListList].getName}'")
+      val message = intercept[AnalysisException] {
+        sql("SELECT testUDFTwoListList() FROM testUDF")
+      }.getMessage
+      assert(message.contains("No handler for Hive udf"))
+      sql("DROP TEMPORARY FUNCTION IF EXISTS testUDFTwoListList")
+    }
+
+    {
+      // HiveGenericUDF
+      sql(s"CREATE TEMPORARY FUNCTION testUDFAnd AS '${classOf[GenericUDFOPAnd].getName}'")
+      val message = intercept[AnalysisException] {
+        sql("SELECT testUDFAnd() FROM testUDF")
+      }.getMessage
+      assert(message.contains("No handler for Hive udf"))
+      sql("DROP TEMPORARY FUNCTION IF EXISTS testUDFAnd")
+    }
+
+    {
+      // Hive UDAF
+      sql(s"CREATE TEMPORARY FUNCTION testUDAFPercentile AS '${classOf[UDAFPercentile].getName}'")
+      val message = intercept[AnalysisException] {
+        sql("SELECT testUDAFPercentile(a) FROM testUDF GROUP BY b")
+      }.getMessage
+      assert(message.contains("No handler for Hive udf"))
+      sql("DROP TEMPORARY FUNCTION IF EXISTS testUDAFPercentile")
+    }
+
+    {
+      // AbstractGenericUDAFResolver
+      sql(s"CREATE TEMPORARY FUNCTION testUDAFAverage AS '${classOf[GenericUDAFAverage].getName}'")
+      val message = intercept[AnalysisException] {
+        sql("SELECT testUDAFAverage() FROM testUDF GROUP BY b")
+      }.getMessage
+      assert(message.contains("No handler for Hive udf"))
+      sql("DROP TEMPORARY FUNCTION IF EXISTS testUDAFAverage")
+    }
+
+    {
+      // Hive UDTF
+      sql(s"CREATE TEMPORARY FUNCTION testUDTFExplode AS '${classOf[GenericUDTFExplode].getName}'")
+      val message = intercept[AnalysisException] {
+        sql("SELECT testUDTFExplode() FROM testUDF")
+      }.getMessage
+      assert(message.contains("No handler for Hive udf"))
+      sql("DROP TEMPORARY FUNCTION IF EXISTS testUDTFExplode")
+    }
+
+    sqlContext.dropTempTable("testUDF")
+  }
 }
 
 class TestPair(x: Int, y: Int) extends Writable with Serializable {

From 01cd688f5245cbb752863100b399b525b31c3510 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 1 Oct 2015 17:23:27 -0700
Subject: [PATCH 128/896] [SPARK-10400] [SQL] Renames
 SQLConf.PARQUET_FOLLOW_PARQUET_FORMAT_SPEC

We introduced SQL option `spark.sql.parquet.followParquetFormatSpec` while working on implementing Parquet backwards-compatibility rules in SPARK-6777. It indicates whether we should use legacy Parquet format adopted by Spark 1.4 and prior versions or the standard format defined in parquet-format spec to write Parquet files.

This option defaults to `false` and is marked as a non-public option (`isPublic = false`) because we haven't finished refactored Parquet write path. The problem is, the name of this option is somewhat confusing, because it's not super intuitive why we shouldn't follow the spec. Would be nice to rename it to `spark.sql.parquet.writeLegacyFormat`, and invert its default value (the two option names have opposite meanings).

Although this option is private in 1.5, we'll make it public in 1.6 after refactoring Parquet write path. So that users can decide whether to write Parquet files in standard format or legacy format.

Author: Cheng Lian <lian@databricks.com>

Closes #8566 from liancheng/spark-10400/deprecate-follow-parquet-format-spec.
---
 .../scala/org/apache/spark/sql/SQLConf.scala  |  11 +-
 .../parquet/CatalystReadSupport.scala         |   2 +-
 .../parquet/CatalystSchemaConverter.scala     |  61 ++--
 .../datasources/parquet/ParquetRelation.scala |  14 +-
 .../parquet/ParquetSchemaSuite.scala          | 289 ++++++++++++------
 .../apache/spark/sql/hive/parquetSuites.scala |   2 +-
 6 files changed, 231 insertions(+), 148 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index b9fb90d96420..e7bbc7d5db49 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -290,9 +290,9 @@ private[spark] object SQLConf {
     defaultValue = Some(true),
     doc = "Enables Parquet filter push-down optimization when set to true.")
 
-  val PARQUET_FOLLOW_PARQUET_FORMAT_SPEC = booleanConf(
-    key = "spark.sql.parquet.followParquetFormatSpec",
-    defaultValue = Some(false),
+  val PARQUET_WRITE_LEGACY_FORMAT = booleanConf(
+    key = "spark.sql.parquet.writeLegacyFormat",
+    defaultValue = Some(true),
     doc = "Whether to follow Parquet's format specification when converting Parquet schema to " +
       "Spark SQL schema and vice versa.",
     isPublic = false)
@@ -304,8 +304,7 @@ private[spark] object SQLConf {
       "subclass of org.apache.hadoop.mapreduce.OutputCommitter.  Typically, it's also a subclass " +
       "of org.apache.parquet.hadoop.ParquetOutputCommitter.  NOTE: 1. Instead of SQLConf, this " +
       "option must be set in Hadoop Configuration.  2. This option overrides " +
-      "\"spark.sql.sources.outputCommitterClass\"."
-  )
+      "\"spark.sql.sources.outputCommitterClass\".")
 
   val ORC_FILTER_PUSHDOWN_ENABLED = booleanConf("spark.sql.orc.filterPushdown",
     defaultValue = Some(false),
@@ -491,7 +490,7 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def isParquetINT96AsTimestamp: Boolean = getConf(PARQUET_INT96_AS_TIMESTAMP)
 
-  private[spark] def followParquetFormatSpec: Boolean = getConf(PARQUET_FOLLOW_PARQUET_FORMAT_SPEC)
+  private[spark] def writeLegacyParquetFormat: Boolean = getConf(PARQUET_WRITE_LEGACY_FORMAT)
 
   private[spark] def inMemoryPartitionPruning: Boolean = getConf(IN_MEMORY_PARTITION_PRUNING)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
index 9502b835a54d..532569803409 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
@@ -263,7 +263,7 @@ private[parquet] object CatalystReadSupport {
   private def clipParquetGroupFields(
       parquetRecord: GroupType, structType: StructType): Seq[Type] = {
     val parquetFieldMap = parquetRecord.getFields.asScala.map(f => f.getName -> f).toMap
-    val toParquet = new CatalystSchemaConverter(followParquetFormatSpec = true)
+    val toParquet = new CatalystSchemaConverter(writeLegacyParquetFormat = false)
     structType.map { f =>
       parquetFieldMap
         .get(f.name)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
index 97ffeb08aafe..6904fc736c10 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
@@ -41,34 +41,31 @@ import org.apache.spark.sql.{AnalysisException, SQLConf}
  * @constructor
  * @param assumeBinaryIsString Whether unannotated BINARY fields should be assumed to be Spark SQL
  *        [[StringType]] fields when converting Parquet a [[MessageType]] to Spark SQL
- *        [[StructType]].
+ *        [[StructType]].  This argument only affects Parquet read path.
  * @param assumeInt96IsTimestamp Whether unannotated INT96 fields should be assumed to be Spark SQL
  *        [[TimestampType]] fields when converting Parquet a [[MessageType]] to Spark SQL
  *        [[StructType]].  Note that Spark SQL [[TimestampType]] is similar to Hive timestamp, which
  *        has optional nanosecond precision, but different from `TIME_MILLS` and `TIMESTAMP_MILLIS`
- *        described in Parquet format spec.
- * @param followParquetFormatSpec Whether to generate standard DECIMAL, LIST, and MAP structure when
- *        converting Spark SQL [[StructType]] to Parquet [[MessageType]].  For Spark 1.4.x and
- *        prior versions, Spark SQL only supports decimals with a max precision of 18 digits, and
- *        uses non-standard LIST and MAP structure.  Note that the current Parquet format spec is
- *        backwards-compatible with these settings.  If this argument is set to `false`, we fallback
- *        to old style non-standard behaviors.
+ *        described in Parquet format spec.  This argument only affects Parquet read path.
+ * @param writeLegacyParquetFormat Whether to use legacy Parquet format compatible with Spark 1.4
+ *        and prior versions when converting a Catalyst [[StructType]] to a Parquet [[MessageType]].
+ *        When set to false, use standard format defined in parquet-format spec.  This argument only
+ *        affects Parquet write path.
  */
 private[parquet] class CatalystSchemaConverter(
     assumeBinaryIsString: Boolean = SQLConf.PARQUET_BINARY_AS_STRING.defaultValue.get,
     assumeInt96IsTimestamp: Boolean = SQLConf.PARQUET_INT96_AS_TIMESTAMP.defaultValue.get,
-    followParquetFormatSpec: Boolean = SQLConf.PARQUET_FOLLOW_PARQUET_FORMAT_SPEC.defaultValue.get
-) {
+    writeLegacyParquetFormat: Boolean = SQLConf.PARQUET_WRITE_LEGACY_FORMAT.defaultValue.get) {
 
   def this(conf: SQLConf) = this(
     assumeBinaryIsString = conf.isParquetBinaryAsString,
     assumeInt96IsTimestamp = conf.isParquetINT96AsTimestamp,
-    followParquetFormatSpec = conf.followParquetFormatSpec)
+    writeLegacyParquetFormat = conf.writeLegacyParquetFormat)
 
   def this(conf: Configuration) = this(
     assumeBinaryIsString = conf.get(SQLConf.PARQUET_BINARY_AS_STRING.key).toBoolean,
     assumeInt96IsTimestamp = conf.get(SQLConf.PARQUET_INT96_AS_TIMESTAMP.key).toBoolean,
-    followParquetFormatSpec = conf.get(SQLConf.PARQUET_FOLLOW_PARQUET_FORMAT_SPEC.key).toBoolean)
+    writeLegacyParquetFormat = conf.get(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key).toBoolean)
 
   /**
    * Converts Parquet [[MessageType]] `parquetSchema` to a Spark SQL [[StructType]].
@@ -371,15 +368,15 @@ private[parquet] class CatalystSchemaConverter(
       case BinaryType =>
         Types.primitive(BINARY, repetition).named(field.name)
 
-      // =====================================
-      // Decimals (for Spark version <= 1.4.x)
-      // =====================================
+      // ======================
+      // Decimals (legacy mode)
+      // ======================
 
       // Spark 1.4.x and prior versions only support decimals with a maximum precision of 18 and
       // always store decimals in fixed-length byte arrays.  To keep compatibility with these older
       // versions, here we convert decimals with all precisions to `FIXED_LEN_BYTE_ARRAY` annotated
       // by `DECIMAL`.
-      case DecimalType.Fixed(precision, scale) if !followParquetFormatSpec =>
+      case DecimalType.Fixed(precision, scale) if writeLegacyParquetFormat =>
         Types
           .primitive(FIXED_LEN_BYTE_ARRAY, repetition)
           .as(DECIMAL)
@@ -388,13 +385,13 @@ private[parquet] class CatalystSchemaConverter(
           .length(CatalystSchemaConverter.minBytesForPrecision(precision))
           .named(field.name)
 
-      // =====================================
-      // Decimals (follow Parquet format spec)
-      // =====================================
+      // ========================
+      // Decimals (standard mode)
+      // ========================
 
       // Uses INT32 for 1 <= precision <= 9
       case DecimalType.Fixed(precision, scale)
-          if precision <= MAX_PRECISION_FOR_INT32 && followParquetFormatSpec =>
+          if precision <= MAX_PRECISION_FOR_INT32 && !writeLegacyParquetFormat =>
         Types
           .primitive(INT32, repetition)
           .as(DECIMAL)
@@ -404,7 +401,7 @@ private[parquet] class CatalystSchemaConverter(
 
       // Uses INT64 for 1 <= precision <= 18
       case DecimalType.Fixed(precision, scale)
-          if precision <= MAX_PRECISION_FOR_INT64 && followParquetFormatSpec =>
+          if precision <= MAX_PRECISION_FOR_INT64 && !writeLegacyParquetFormat =>
         Types
           .primitive(INT64, repetition)
           .as(DECIMAL)
@@ -413,7 +410,7 @@ private[parquet] class CatalystSchemaConverter(
           .named(field.name)
 
       // Uses FIXED_LEN_BYTE_ARRAY for all other precisions
-      case DecimalType.Fixed(precision, scale) if followParquetFormatSpec =>
+      case DecimalType.Fixed(precision, scale) if !writeLegacyParquetFormat =>
         Types
           .primitive(FIXED_LEN_BYTE_ARRAY, repetition)
           .as(DECIMAL)
@@ -422,15 +419,15 @@ private[parquet] class CatalystSchemaConverter(
           .length(CatalystSchemaConverter.minBytesForPrecision(precision))
           .named(field.name)
 
-      // ===================================================
-      // ArrayType and MapType (for Spark versions <= 1.4.x)
-      // ===================================================
+      // ===================================
+      // ArrayType and MapType (legacy mode)
+      // ===================================
 
       // Spark 1.4.x and prior versions convert `ArrayType` with nullable elements into a 3-level
       // `LIST` structure.  This behavior is somewhat a hybrid of parquet-hive and parquet-avro
       // (1.6.0rc3): the 3-level structure is similar to parquet-hive while the 3rd level element
       // field name "array" is borrowed from parquet-avro.
-      case ArrayType(elementType, nullable @ true) if !followParquetFormatSpec =>
+      case ArrayType(elementType, nullable @ true) if writeLegacyParquetFormat =>
         // <list-repetition> group <name> (LIST) {
         //   optional group bag {
         //     repeated <element-type> array;
@@ -448,7 +445,7 @@ private[parquet] class CatalystSchemaConverter(
       // Spark 1.4.x and prior versions convert ArrayType with non-nullable elements into a 2-level
       // LIST structure.  This behavior mimics parquet-avro (1.6.0rc3).  Note that this case is
       // covered by the backwards-compatibility rules implemented in `isElementType()`.
-      case ArrayType(elementType, nullable @ false) if !followParquetFormatSpec =>
+      case ArrayType(elementType, nullable @ false) if writeLegacyParquetFormat =>
         // <list-repetition> group <name> (LIST) {
         //   repeated <element-type> element;
         // }
@@ -460,7 +457,7 @@ private[parquet] class CatalystSchemaConverter(
 
       // Spark 1.4.x and prior versions convert MapType into a 3-level group annotated by
       // MAP_KEY_VALUE.  This is covered by `convertGroupField(field: GroupType): DataType`.
-      case MapType(keyType, valueType, valueContainsNull) if !followParquetFormatSpec =>
+      case MapType(keyType, valueType, valueContainsNull) if writeLegacyParquetFormat =>
         // <map-repetition> group <name> (MAP) {
         //   repeated group map (MAP_KEY_VALUE) {
         //     required <key-type> key;
@@ -473,11 +470,11 @@ private[parquet] class CatalystSchemaConverter(
           convertField(StructField("key", keyType, nullable = false)),
           convertField(StructField("value", valueType, valueContainsNull)))
 
-      // ==================================================
-      // ArrayType and MapType (follow Parquet format spec)
-      // ==================================================
+      // =====================================
+      // ArrayType and MapType (standard mode)
+      // =====================================
 
-      case ArrayType(elementType, containsNull) if followParquetFormatSpec =>
+      case ArrayType(elementType, containsNull) if !writeLegacyParquetFormat =>
         // <list-repetition> group <name> (LIST) {
         //   repeated group list {
         //     <element-repetition> <element-type> element;
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 953fcab12697..8a9c0e733a9a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -287,7 +287,7 @@ private[sql] class ParquetRelation(
     val parquetFilterPushDown = sqlContext.conf.parquetFilterPushDown
     val assumeBinaryIsString = sqlContext.conf.isParquetBinaryAsString
     val assumeInt96IsTimestamp = sqlContext.conf.isParquetINT96AsTimestamp
-    val followParquetFormatSpec = sqlContext.conf.followParquetFormatSpec
+    val writeLegacyParquetFormat = sqlContext.conf.writeLegacyParquetFormat
 
     // Parquet row group size. We will use this value as the value for
     // mapreduce.input.fileinputformat.split.minsize and mapred.min.split.size if the value
@@ -305,7 +305,7 @@ private[sql] class ParquetRelation(
         parquetFilterPushDown,
         assumeBinaryIsString,
         assumeInt96IsTimestamp,
-        followParquetFormatSpec) _
+        writeLegacyParquetFormat) _
 
     // Create the function to set input paths at the driver side.
     val setInputPaths =
@@ -531,7 +531,7 @@ private[sql] object ParquetRelation extends Logging {
       parquetFilterPushDown: Boolean,
       assumeBinaryIsString: Boolean,
       assumeInt96IsTimestamp: Boolean,
-      followParquetFormatSpec: Boolean)(job: Job): Unit = {
+      writeLegacyParquetFormat: Boolean)(job: Job): Unit = {
     val conf = SparkHadoopUtil.get.getConfigurationFromJobContext(job)
     conf.set(ParquetInputFormat.READ_SUPPORT_CLASS, classOf[CatalystReadSupport].getName)
 
@@ -561,7 +561,7 @@ private[sql] object ParquetRelation extends Logging {
     // Sets flags for Parquet schema conversion
     conf.setBoolean(SQLConf.PARQUET_BINARY_AS_STRING.key, assumeBinaryIsString)
     conf.setBoolean(SQLConf.PARQUET_INT96_AS_TIMESTAMP.key, assumeInt96IsTimestamp)
-    conf.setBoolean(SQLConf.PARQUET_FOLLOW_PARQUET_FORMAT_SPEC.key, followParquetFormatSpec)
+    conf.setBoolean(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key, writeLegacyParquetFormat)
 
     overrideMinSplitSize(parquetBlockSize, conf)
   }
@@ -586,7 +586,7 @@ private[sql] object ParquetRelation extends Logging {
       val converter = new CatalystSchemaConverter(
         sqlContext.conf.isParquetBinaryAsString,
         sqlContext.conf.isParquetBinaryAsString,
-        sqlContext.conf.followParquetFormatSpec)
+        sqlContext.conf.writeLegacyParquetFormat)
 
       converter.convert(schema)
     }
@@ -720,7 +720,7 @@ private[sql] object ParquetRelation extends Logging {
       filesToTouch: Seq[FileStatus], sqlContext: SQLContext): Option[StructType] = {
     val assumeBinaryIsString = sqlContext.conf.isParquetBinaryAsString
     val assumeInt96IsTimestamp = sqlContext.conf.isParquetINT96AsTimestamp
-    val followParquetFormatSpec = sqlContext.conf.followParquetFormatSpec
+    val writeLegacyParquetFormat = sqlContext.conf.writeLegacyParquetFormat
     val serializedConf = new SerializableConfiguration(sqlContext.sparkContext.hadoopConfiguration)
 
     // !! HACK ALERT !!
@@ -760,7 +760,7 @@ private[sql] object ParquetRelation extends Logging {
             new CatalystSchemaConverter(
               assumeBinaryIsString = assumeBinaryIsString,
               assumeInt96IsTimestamp = assumeInt96IsTimestamp,
-              followParquetFormatSpec = followParquetFormatSpec)
+              writeLegacyParquetFormat = writeLegacyParquetFormat)
 
           footers.map { footer =>
             ParquetRelation.readSchemaFromFooter(footer, converter)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
index 5a8f772c3228..f17fb36f25fe 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
@@ -22,7 +22,6 @@ import scala.reflect.runtime.universe.TypeTag
 
 import org.apache.parquet.schema.MessageTypeParser
 
-import org.apache.spark.sql.SQLConf
 import org.apache.spark.sql.catalyst.ScalaReflection
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
@@ -35,32 +34,29 @@ abstract class ParquetSchemaTest extends ParquetTest with SharedSQLContext {
   protected def testSchemaInference[T <: Product: ClassTag: TypeTag](
       testName: String,
       messageType: String,
-      binaryAsString: Boolean = true,
-      int96AsTimestamp: Boolean = true,
-      followParquetFormatSpec: Boolean = false,
-      isThriftDerived: Boolean = false): Unit = {
+      binaryAsString: Boolean,
+      int96AsTimestamp: Boolean,
+      writeLegacyParquetFormat: Boolean): Unit = {
     testSchema(
       testName,
       StructType.fromAttributes(ScalaReflection.attributesFor[T]),
       messageType,
       binaryAsString,
       int96AsTimestamp,
-      followParquetFormatSpec,
-      isThriftDerived)
+      writeLegacyParquetFormat)
   }
 
   protected def testParquetToCatalyst(
       testName: String,
       sqlSchema: StructType,
       parquetSchema: String,
-      binaryAsString: Boolean = true,
-      int96AsTimestamp: Boolean = true,
-      followParquetFormatSpec: Boolean = false,
-      isThriftDerived: Boolean = false): Unit = {
+      binaryAsString: Boolean,
+      int96AsTimestamp: Boolean,
+      writeLegacyParquetFormat: Boolean): Unit = {
     val converter = new CatalystSchemaConverter(
       assumeBinaryIsString = binaryAsString,
       assumeInt96IsTimestamp = int96AsTimestamp,
-      followParquetFormatSpec = followParquetFormatSpec)
+      writeLegacyParquetFormat = writeLegacyParquetFormat)
 
     test(s"sql <= parquet: $testName") {
       val actual = converter.convert(MessageTypeParser.parseMessageType(parquetSchema))
@@ -78,14 +74,13 @@ abstract class ParquetSchemaTest extends ParquetTest with SharedSQLContext {
       testName: String,
       sqlSchema: StructType,
       parquetSchema: String,
-      binaryAsString: Boolean = true,
-      int96AsTimestamp: Boolean = true,
-      followParquetFormatSpec: Boolean = false,
-      isThriftDerived: Boolean = false): Unit = {
+      binaryAsString: Boolean,
+      int96AsTimestamp: Boolean,
+      writeLegacyParquetFormat: Boolean): Unit = {
     val converter = new CatalystSchemaConverter(
       assumeBinaryIsString = binaryAsString,
       assumeInt96IsTimestamp = int96AsTimestamp,
-      followParquetFormatSpec = followParquetFormatSpec)
+      writeLegacyParquetFormat = writeLegacyParquetFormat)
 
     test(s"sql => parquet: $testName") {
       val actual = converter.convert(sqlSchema)
@@ -99,10 +94,9 @@ abstract class ParquetSchemaTest extends ParquetTest with SharedSQLContext {
       testName: String,
       sqlSchema: StructType,
       parquetSchema: String,
-      binaryAsString: Boolean = true,
-      int96AsTimestamp: Boolean = true,
-      followParquetFormatSpec: Boolean = false,
-      isThriftDerived: Boolean = false): Unit = {
+      binaryAsString: Boolean,
+      int96AsTimestamp: Boolean,
+      writeLegacyParquetFormat: Boolean): Unit = {
 
     testCatalystToParquet(
       testName,
@@ -110,8 +104,7 @@ abstract class ParquetSchemaTest extends ParquetTest with SharedSQLContext {
       parquetSchema,
       binaryAsString,
       int96AsTimestamp,
-      followParquetFormatSpec,
-      isThriftDerived)
+      writeLegacyParquetFormat)
 
     testParquetToCatalyst(
       testName,
@@ -119,8 +112,7 @@ abstract class ParquetSchemaTest extends ParquetTest with SharedSQLContext {
       parquetSchema,
       binaryAsString,
       int96AsTimestamp,
-      followParquetFormatSpec,
-      isThriftDerived)
+      writeLegacyParquetFormat)
   }
 }
 
@@ -137,7 +129,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  optional binary  _6;
       |}
     """.stripMargin,
-    binaryAsString = false)
+    binaryAsString = false,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[(Byte, Short, Int, Long, java.sql.Date)](
     "logical integral types",
@@ -149,7 +143,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  required int64 _4 (INT_64);
       |  optional int32 _5 (DATE);
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[String]](
     "string",
@@ -158,7 +155,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  optional binary _1 (UTF8);
       |}
     """.stripMargin,
-    binaryAsString = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[String]](
     "binary enum as string",
@@ -166,7 +165,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |message root {
       |  optional binary _1 (ENUM);
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[Seq[Int]]](
     "non-nullable array - non-standard",
@@ -176,7 +178,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |    repeated int32 array;
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[Seq[Int]]](
     "non-nullable array - standard",
@@ -189,7 +194,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchemaInference[Tuple1[Seq[Integer]]](
     "nullable array - non-standard",
@@ -201,7 +208,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[Seq[Integer]]](
     "nullable array - standard",
@@ -214,7 +224,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchemaInference[Tuple1[Map[Int, String]]](
     "map - standard",
@@ -228,7 +240,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchemaInference[Tuple1[Map[Int, String]]](
     "map - non-standard",
@@ -241,7 +255,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[Pair[Int, String]]](
     "struct",
@@ -253,7 +270,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchemaInference[Tuple1[Map[Int, (String, Seq[(Int, Double)])]]](
     "deeply nested type - non-standard",
@@ -276,7 +295,10 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchemaInference[Tuple1[Map[Int, (String, Seq[(Int, Double)])]]](
     "deeply nested type - standard",
@@ -300,7 +322,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchemaInference[(Option[Int], Map[Int, Option[Double]])](
     "optional types",
@@ -315,36 +339,9 @@ class ParquetSchemaInferenceSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
-
-  // Parquet files generated by parquet-thrift are already handled by the schema converter, but
-  // let's leave this test here until both read path and write path are all updated.
-  ignore("thrift generated parquet schema") {
-    // Test for SPARK-4520 -- ensure that thrift generated parquet schema is generated
-    // as expected from attributes
-    testSchemaInference[(
-      Array[Byte], Array[Byte], Array[Byte], Seq[Int], Map[Array[Byte], Seq[Int]])](
-      "thrift generated parquet schema",
-      """
-        |message root {
-        |  optional binary _1 (UTF8);
-        |  optional binary _2 (UTF8);
-        |  optional binary _3 (UTF8);
-        |  optional group _4 (LIST) {
-        |    repeated int32 _4_tuple;
-        |  }
-        |  optional group _5 (MAP) {
-        |    repeated group map (MAP_KEY_VALUE) {
-        |      required binary key (UTF8);
-        |      optional group value (LIST) {
-        |        repeated int32 value_tuple;
-        |      }
-        |    }
-        |  }
-        |}
-      """.stripMargin,
-      isThriftDerived = true)
-  }
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 }
 
 class ParquetSchemaSuite extends ParquetSchemaTest {
@@ -470,7 +467,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with nullable element type - 2",
@@ -486,7 +486,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 1 - standard",
@@ -499,7 +502,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 2",
@@ -512,7 +518,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 3",
@@ -523,7 +532,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    repeated int32 element;
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 4",
@@ -544,7 +556,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 5 - parquet-avro style",
@@ -563,7 +578,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type - 6 - parquet-thrift style",
@@ -582,7 +600,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type 7 - " +
@@ -592,7 +613,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     """message root {
       |  repeated int32 f1;
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: LIST with non-nullable element type 8 - " +
@@ -612,7 +636,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    required int32 c2;
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   // =======================================================
   // Tests for converting Catalyst ArrayType to Parquet LIST
@@ -633,7 +660,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testCatalystToParquet(
     "Backwards-compatibility: LIST with nullable element type - 2 - prior to 1.4.x",
@@ -649,7 +678,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testCatalystToParquet(
     "Backwards-compatibility: LIST with non-nullable element type - 1 - standard",
@@ -666,7 +698,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testCatalystToParquet(
     "Backwards-compatibility: LIST with non-nullable element type - 2 - prior to 1.4.x",
@@ -680,7 +714,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    repeated int32 array;
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   // ====================================================
   // Tests for converting Parquet Map to Catalyst MapType
@@ -701,7 +738,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: MAP with non-nullable value type - 2",
@@ -718,7 +758,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: MAP with non-nullable value type - 3 - prior to 1.4.x",
@@ -735,7 +778,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: MAP with nullable value type - 1 - standard",
@@ -752,7 +798,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: MAP with nullable value type - 2",
@@ -769,7 +818,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testParquetToCatalyst(
     "Backwards-compatibility: MAP with nullable value type - 3 - parquet-avro style",
@@ -786,7 +838,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   // ====================================================
   // Tests for converting Catalyst MapType to Parquet Map
@@ -808,7 +863,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testCatalystToParquet(
     "Backwards-compatibility: MAP with non-nullable value type - 2 - prior to 1.4.x",
@@ -825,7 +882,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testCatalystToParquet(
     "Backwards-compatibility: MAP with nullable value type - 1 - standard",
@@ -843,7 +903,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  }
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testCatalystToParquet(
     "Backwards-compatibility: MAP with nullable value type - 3 - prior to 1.4.x",
@@ -860,7 +922,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |    }
       |  }
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   // =================================
   // Tests for conversion for decimals
@@ -873,7 +938,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  optional int32 f1 (DECIMAL(1, 0));
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchema(
     "DECIMAL(8, 3) - standard",
@@ -882,7 +949,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  optional int32 f1 (DECIMAL(8, 3));
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchema(
     "DECIMAL(9, 3) - standard",
@@ -891,7 +960,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  optional int32 f1 (DECIMAL(9, 3));
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchema(
     "DECIMAL(18, 3) - standard",
@@ -900,7 +971,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  optional int64 f1 (DECIMAL(18, 3));
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchema(
     "DECIMAL(19, 3) - standard",
@@ -909,7 +982,9 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
       |  optional fixed_len_byte_array(9) f1 (DECIMAL(19, 3));
       |}
     """.stripMargin,
-    followParquetFormatSpec = true)
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = false)
 
   testSchema(
     "DECIMAL(1, 0) - prior to 1.4.x",
@@ -917,7 +992,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     """message root {
       |  optional fixed_len_byte_array(1) f1 (DECIMAL(1, 0));
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchema(
     "DECIMAL(8, 3) - prior to 1.4.x",
@@ -925,7 +1003,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     """message root {
       |  optional fixed_len_byte_array(4) f1 (DECIMAL(8, 3));
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchema(
     "DECIMAL(9, 3) - prior to 1.4.x",
@@ -933,7 +1014,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     """message root {
       |  optional fixed_len_byte_array(5) f1 (DECIMAL(9, 3));
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   testSchema(
     "DECIMAL(18, 3) - prior to 1.4.x",
@@ -941,7 +1025,10 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     """message root {
       |  optional fixed_len_byte_array(8) f1 (DECIMAL(18, 3));
       |}
-    """.stripMargin)
+    """.stripMargin,
+    binaryAsString = true,
+    int96AsTimestamp = true,
+    writeLegacyParquetFormat = true)
 
   private def testSchemaClipping(
       testName: String,
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
index 7d8104f9358d..ff2d0a35e309 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
@@ -620,7 +620,7 @@ class ParquetSourceSuite extends ParquetPartitioningTest {
         val conf = Seq(
           HiveContext.CONVERT_METASTORE_PARQUET.key -> "false",
           SQLConf.PARQUET_BINARY_AS_STRING.key -> "true",
-          SQLConf.PARQUET_FOLLOW_PARQUET_FORMAT_SPEC.key -> "true")
+          SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "false")
 
         withSQLConf(conf: _*) {
           sql(

From 2272962eb087ffedaee12c761506e33e45bd0239 Mon Sep 17 00:00:00 2001
From: Takeshi YAMAMURO <linguin.m.s@gmail.com>
Date: Thu, 1 Oct 2015 21:33:27 -0400
Subject: [PATCH 129/896] [SPARK-9867] [SQL] Move utilities for binary data
 into ByteArray

The utilities such as Substring#substringBinarySQL and BinaryPrefixComparator#computePrefix for binary data are put together in ByteArray for easy-to-read.

Author: Takeshi YAMAMURO <linguin.m.s@gmail.com>

Closes #8122 from maropu/CleanUpForBinaryType.
---
 .../unsafe/sort/PrefixComparators.java        | 17 +------
 .../expressions/stringExpressions.scala       | 39 ++-------------
 .../apache/spark/unsafe/types/ByteArray.java  | 47 ++++++++++++++++++-
 3 files changed, 52 insertions(+), 51 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/PrefixComparators.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/PrefixComparators.java
index 71b76d5ddfaa..d2bf297c6c17 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/PrefixComparators.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/PrefixComparators.java
@@ -21,6 +21,7 @@
 
 import org.apache.spark.annotation.Private;
 import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.types.ByteArray;
 import org.apache.spark.unsafe.types.UTF8String;
 import org.apache.spark.util.Utils;
 
@@ -62,21 +63,7 @@ public int compare(long aPrefix, long bPrefix) {
     }
 
     public static long computePrefix(byte[] bytes) {
-      if (bytes == null) {
-        return 0L;
-      } else {
-        /**
-         * TODO: If a wrapper for BinaryType is created (SPARK-8786),
-         * these codes below will be in the wrapper class.
-         */
-        final int minLen = Math.min(bytes.length, 8);
-        long p = 0;
-        for (int i = 0; i < minLen; ++i) {
-          p |= (128L + Platform.getByte(bytes, Platform.BYTE_ARRAY_OFFSET + i))
-              << (56 - 8 * i);
-        }
-        return p;
-      }
+      return ByteArray.getPrefix(bytes);
     }
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
index a09d5b6e3ad1..4ab27c044f50 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
@@ -18,14 +18,12 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import java.text.DecimalFormat
-import java.util.Arrays
-import java.util.{Map => JMap, HashMap}
-import java.util.Locale
+import java.util.{HashMap, Locale, Map => JMap}
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen._
 import org.apache.spark.sql.types._
-import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.unsafe.types.{ByteArray, UTF8String}
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // This file defines expressions for string operations.
@@ -690,34 +688,6 @@ case class StringSpace(child: Expression)
   override def prettyName: String = "space"
 }
 
-object Substring {
-  def subStringBinarySQL(bytes: Array[Byte], pos: Int, len: Int): Array[Byte] = {
-    if (pos > bytes.length) {
-      return Array[Byte]()
-    }
-
-    var start = if (pos > 0) {
-      pos - 1
-    } else if (pos < 0) {
-      bytes.length + pos
-    } else {
-      0
-    }
-
-    val end = if ((bytes.length - start) < len) {
-      bytes.length
-    } else {
-      start + len
-    }
-
-    start = Math.max(start, 0)  // underflow
-    if (start < end) {
-      Arrays.copyOfRange(bytes, start, end)
-    } else {
-      Array[Byte]()
-    }
-  }
-}
 /**
  * A function that takes a substring of its first argument starting at a given position.
  * Defined for String and Binary types.
@@ -740,18 +710,17 @@ case class Substring(str: Expression, pos: Expression, len: Expression)
     str.dataType match {
       case StringType => string.asInstanceOf[UTF8String]
         .substringSQL(pos.asInstanceOf[Int], len.asInstanceOf[Int])
-      case BinaryType => Substring.subStringBinarySQL(string.asInstanceOf[Array[Byte]],
+      case BinaryType => ByteArray.subStringSQL(string.asInstanceOf[Array[Byte]],
         pos.asInstanceOf[Int], len.asInstanceOf[Int])
     }
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
 
-    val cls = classOf[Substring].getName
     defineCodeGen(ctx, ev, (string, pos, len) => {
       str.dataType match {
         case StringType => s"$string.substringSQL($pos, $len)"
-        case BinaryType => s"$cls.subStringBinarySQL($string, $pos, $len)"
+        case BinaryType => s"${classOf[ByteArray].getName}.subStringSQL($string, $pos, $len)"
       }
     })
   }
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java b/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java
index c08c9c73d239..3ced2094f5e6 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/types/ByteArray.java
@@ -19,7 +19,11 @@
 
 import org.apache.spark.unsafe.Platform;
 
-public class ByteArray {
+import java.util.Arrays;
+
+public final class ByteArray {
+
+  public static final byte[] EMPTY_BYTE = new byte[0];
 
   /**
    * Writes the content of a byte array into a memory address, identified by an object and an
@@ -29,4 +33,45 @@ public class ByteArray {
   public static void writeToMemory(byte[] src, Object target, long targetOffset) {
     Platform.copyMemory(src, Platform.BYTE_ARRAY_OFFSET, target, targetOffset, src.length);
   }
+
+  /**
+   * Returns a 64-bit integer that can be used as the prefix used in sorting.
+   */
+  public static long getPrefix(byte[] bytes) {
+    if (bytes == null) {
+      return 0L;
+    } else {
+      final int minLen = Math.min(bytes.length, 8);
+      long p = 0;
+      for (int i = 0; i < minLen; ++i) {
+        p |= (128L + Platform.getByte(bytes, Platform.BYTE_ARRAY_OFFSET + i))
+            << (56 - 8 * i);
+      }
+      return p;
+    }
+  }
+
+  public static byte[] subStringSQL(byte[] bytes, int pos, int len) {
+    // This pos calculation is according to UTF8String#subStringSQL
+    if (pos > bytes.length) {
+      return EMPTY_BYTE;
+    }
+    int start = 0;
+    int end;
+    if (pos > 0) {
+      start = pos - 1;
+    } else if (pos < 0) {
+      start = bytes.length + pos;
+    }
+    if ((bytes.length - start) < len) {
+      end = bytes.length;
+    } else {
+      end = start + len;
+    }
+    start = Math.max(start, 0); // underflow
+    if (start >= end) {
+      return EMPTY_BYTE;
+    }
+    return Arrays.copyOfRange(bytes, start, end);
+  }
 }

From 2a717821bbb026d4d8c43d31b3300721357951c6 Mon Sep 17 00:00:00 2001
From: Rerngvit Yanggratoke <rerngvit@kth.se>
Date: Fri, 2 Oct 2015 10:15:02 -0700
Subject: [PATCH 130/896] [SPARK-9798] [ML] CrossValidatorModel Documentation
 Improvements

Document CrossValidatorModel members: bestModel and avgMetrics

Author: Rerngvit Yanggratoke <rerngvit@kth.se>

Closes #8882 from rerngvit/Spark-9798.
---
 .../scala/org/apache/spark/ml/tuning/CrossValidator.scala     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
index 0679bfd0f3ff..820c9965d09b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
@@ -136,6 +136,10 @@ class CrossValidator(override val uid: String) extends Estimator[CrossValidatorM
 /**
  * :: Experimental ::
  * Model from k-fold cross validation.
+ *
+ * @param bestModel The best model selected from k-fold cross validation.
+ * @param avgMetrics Average cross-validation metrics for each paramMap in [[estimatorParamMaps]], in the
+ *                   corresponding order.
  */
 @Experimental
 class CrossValidatorModel private[ml] (

From 23a9448c04da7130d6c41c37f9fdf03184422dc8 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Fri, 2 Oct 2015 10:19:18 -0700
Subject: [PATCH 131/896] [SPARK-5890] [ML] Add feature discretizer

JIRA issue [here](https://issues.apache.org/jira/browse/SPARK-5890).

I borrow the code of `findSplits` from `RandomForest`. I don't think it's good to call it from `RandomForest` directly.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #5779 from yinxusen/SPARK-5890.
---
 .../ml/feature/QuantileDiscretizer.scala      | 176 ++++++++++++++++++
 .../ml/feature/QuantileDiscretizerSuite.scala |  98 ++++++++++
 2 files changed, 274 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
new file mode 100644
index 000000000000..46b836da9cfd
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
@@ -0,0 +1,176 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import scala.collection.mutable
+
+import org.apache.spark.Logging
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml._
+import org.apache.spark.ml.attribute.NominalAttribute
+import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
+import org.apache.spark.ml.param.{IntParam, _}
+import org.apache.spark.ml.util._
+import org.apache.spark.sql.types.{DoubleType, StructType}
+import org.apache.spark.sql.{DataFrame, Row}
+import org.apache.spark.util.random.XORShiftRandom
+
+/**
+ * Params for [[QuantileDiscretizer]].
+ */
+private[feature] trait QuantileDiscretizerBase extends Params with HasInputCol with HasOutputCol {
+
+  /**
+   * Maximum number of buckets (quantiles, or categories) into which data points are grouped. Must
+   * be >= 2.
+   * default: 2
+   * @group param
+   */
+  val numBuckets = new IntParam(this, "numBuckets", "Maximum number of buckets (quantiles, or " +
+    "categories) into which data points are grouped. Must be >= 2.",
+    ParamValidators.gtEq(2))
+  setDefault(numBuckets -> 2)
+
+  /** @group getParam */
+  def getNumBuckets: Int = getOrDefault(numBuckets)
+}
+
+/**
+ * :: Experimental ::
+ * `QuantileDiscretizer` takes a column with continuous features and outputs a column with binned
+ * categorical features. The bin ranges are chosen by taking a sample of the data and dividing it
+ * into roughly equal parts. The lower and upper bin bounds will be -Infinity and +Infinity,
+ * covering all real values. This attempts to find numBuckets partitions based on a sample of data,
+ * but it may find fewer depending on the data sample values.
+ */
+@Experimental
+final class QuantileDiscretizer(override val uid: String)
+  extends Estimator[Bucketizer] with QuantileDiscretizerBase {
+
+  def this() = this(Identifiable.randomUID("quantileDiscretizer"))
+
+  /** @group setParam */
+  def setNumBuckets(value: Int): this.type = set(numBuckets, value)
+
+  /** @group setParam */
+  def setInputCol(value: String): this.type = set(inputCol, value)
+
+  /** @group setParam */
+  def setOutputCol(value: String): this.type = set(outputCol, value)
+
+  override def transformSchema(schema: StructType): StructType = {
+    SchemaUtils.checkColumnType(schema, $(inputCol), DoubleType)
+    val inputFields = schema.fields
+    require(inputFields.forall(_.name != $(outputCol)),
+      s"Output column ${$(outputCol)} already exists.")
+    val attr = NominalAttribute.defaultAttr.withName($(outputCol))
+    val outputFields = inputFields :+ attr.toStructField()
+    StructType(outputFields)
+  }
+
+  override def fit(dataset: DataFrame): Bucketizer = {
+    val samples = QuantileDiscretizer.getSampledInput(dataset.select($(inputCol)), $(numBuckets))
+      .map { case Row(feature: Double) => feature }
+    val candidates = QuantileDiscretizer.findSplitCandidates(samples, $(numBuckets) - 1)
+    val splits = QuantileDiscretizer.getSplits(candidates)
+    val bucketizer = new Bucketizer(uid).setSplits(splits)
+    copyValues(bucketizer)
+  }
+
+  override def copy(extra: ParamMap): QuantileDiscretizer = defaultCopy(extra)
+}
+
+private[feature] object QuantileDiscretizer extends Logging {
+  /**
+   * Sampling from the given dataset to collect quantile statistics.
+   */
+  def getSampledInput(dataset: DataFrame, numBins: Int): Array[Row] = {
+    val totalSamples = dataset.count()
+    require(totalSamples > 0,
+      "QuantileDiscretizer requires non-empty input dataset but was given an empty input.")
+    val requiredSamples = math.max(numBins * numBins, 10000)
+    val fraction = math.min(requiredSamples / dataset.count(), 1.0)
+    dataset.sample(withReplacement = false, fraction, new XORShiftRandom().nextInt()).collect()
+  }
+
+  /**
+   * Compute split points with respect to the sample distribution.
+   */
+  def findSplitCandidates(samples: Array[Double], numSplits: Int): Array[Double] = {
+    val valueCountMap = samples.foldLeft(Map.empty[Double, Int]) { (m, x) =>
+      m + ((x, m.getOrElse(x, 0) + 1))
+    }
+    val valueCounts = valueCountMap.toSeq.sortBy(_._1).toArray ++ Array((Double.MaxValue, 1))
+    val possibleSplits = valueCounts.length - 1
+    if (possibleSplits <= numSplits) {
+      valueCounts.dropRight(1).map(_._1)
+    } else {
+      val stride: Double = math.ceil(samples.length.toDouble / (numSplits + 1))
+      val splitsBuilder = mutable.ArrayBuilder.make[Double]
+      var index = 1
+      // currentCount: sum of counts of values that have been visited
+      var currentCount = valueCounts(0)._2
+      // targetCount: target value for `currentCount`. If `currentCount` is closest value to
+      // `targetCount`, then current value is a split threshold. After finding a split threshold,
+      // `targetCount` is added by stride.
+      var targetCount = stride
+      while (index < valueCounts.length) {
+        val previousCount = currentCount
+        currentCount += valueCounts(index)._2
+        val previousGap = math.abs(previousCount - targetCount)
+        val currentGap = math.abs(currentCount - targetCount)
+        // If adding count of current value to currentCount makes the gap between currentCount and
+        // targetCount smaller, previous value is a split threshold.
+        if (previousGap < currentGap) {
+          splitsBuilder += valueCounts(index - 1)._1
+          targetCount += stride
+        }
+        index += 1
+      }
+      splitsBuilder.result()
+    }
+  }
+
+  /**
+   * Adjust split candidates to proper splits by: adding positive/negative infinity to both sides as
+   * needed, and adding a default split value of 0 if no good candidates are found.
+   */
+  def getSplits(candidates: Array[Double]): Array[Double] = {
+    val effectiveValues = if (candidates.size != 0) {
+      if (candidates.head == Double.NegativeInfinity
+        && candidates.last == Double.PositiveInfinity) {
+        candidates.drop(1).dropRight(1)
+      } else if (candidates.head == Double.NegativeInfinity) {
+        candidates.drop(1)
+      } else if (candidates.last == Double.PositiveInfinity) {
+        candidates.dropRight(1)
+      } else {
+        candidates
+      }
+    } else {
+      candidates
+    }
+
+    if (effectiveValues.size == 0) {
+      Array(Double.NegativeInfinity, 0, Double.PositiveInfinity)
+    } else {
+      Array(Double.NegativeInfinity) ++ effectiveValues ++ Array(Double.PositiveInfinity)
+    }
+  }
+}
+
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala
new file mode 100644
index 000000000000..b2bdd8935f90
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import org.apache.spark.ml.attribute.{Attribute, NominalAttribute}
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.sql.{Row, SQLContext}
+import org.apache.spark.{SparkContext, SparkFunSuite}
+
+class QuantileDiscretizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+  import org.apache.spark.ml.feature.QuantileDiscretizerSuite._
+
+  test("Test quantile discretizer") {
+    checkDiscretizedData(sc,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      10,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      Array("-Infinity, 1.0", "1.0, 2.0", "2.0, 3.0", "3.0, Infinity"))
+
+    checkDiscretizedData(sc,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      4,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      Array("-Infinity, 1.0", "1.0, 2.0", "2.0, 3.0", "3.0, Infinity"))
+
+    checkDiscretizedData(sc,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      3,
+      Array[Double](0, 1, 2, 2, 2, 2, 2, 2, 2),
+      Array("-Infinity, 2.0", "2.0, 3.0", "3.0, Infinity"))
+
+    checkDiscretizedData(sc,
+      Array[Double](1, 2, 3, 3, 3, 3, 3, 3, 3),
+      2,
+      Array[Double](0, 1, 1, 1, 1, 1, 1, 1, 1),
+      Array("-Infinity, 2.0", "2.0, Infinity"))
+
+  }
+
+  test("Test getting splits") {
+    val splitTestPoints = Array(
+      Array[Double]() -> Array(Double.NegativeInfinity, 0, Double.PositiveInfinity),
+      Array(Double.NegativeInfinity) -> Array(Double.NegativeInfinity, 0, Double.PositiveInfinity),
+      Array(Double.PositiveInfinity) -> Array(Double.NegativeInfinity, 0, Double.PositiveInfinity),
+      Array(Double.NegativeInfinity, Double.PositiveInfinity)
+        -> Array(Double.NegativeInfinity, 0, Double.PositiveInfinity),
+      Array(0.0) -> Array(Double.NegativeInfinity, 0, Double.PositiveInfinity),
+      Array(1.0) -> Array(Double.NegativeInfinity, 1, Double.PositiveInfinity),
+      Array(0.0, 1.0) -> Array(Double.NegativeInfinity, 0, 1, Double.PositiveInfinity)
+    )
+    for ((ori, res) <- splitTestPoints) {
+      assert(QuantileDiscretizer.getSplits(ori) === res, "Returned splits are invalid.")
+    }
+  }
+}
+
+private object QuantileDiscretizerSuite extends SparkFunSuite {
+
+  def checkDiscretizedData(
+      sc: SparkContext,
+      data: Array[Double],
+      numBucket: Int,
+      expectedResult: Array[Double],
+      expectedAttrs: Array[String]): Unit = {
+    val sqlCtx = SQLContext.getOrCreate(sc)
+    import sqlCtx.implicits._
+
+    val df = sc.parallelize(data.map(Tuple1.apply)).toDF("input")
+    val discretizer = new QuantileDiscretizer().setInputCol("input").setOutputCol("result")
+      .setNumBuckets(numBucket)
+    val result = discretizer.fit(df).transform(df)
+
+    val transformedFeatures = result.select("result").collect()
+      .map { case Row(transformedFeature: Double) => transformedFeature }
+    val transformedAttrs = Attribute.fromStructField(result.schema("result"))
+      .asInstanceOf[NominalAttribute].values.get
+
+    assert(transformedFeatures === expectedResult,
+      "Transformed features do not equal expected features.")
+    assert(transformedAttrs === expectedAttrs,
+      "Transformed attributes do not equal expected attributes.")
+  }
+}

From 633aaae0a1e31e9ba634423840e350b22342c6b5 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Fri, 2 Oct 2015 10:25:58 -0700
Subject: [PATCH 132/896] [SPARK-6530] [ML] Add chi-square selector for ml
 package

See JIRA [here](https://issues.apache.org/jira/browse/SPARK-6530).

Author: Xusen Yin <yinxusen@gmail.com>

Closes #5742 from yinxusen/SPARK-6530.
---
 .../spark/ml/feature/ChiSqSelector.scala      | 150 ++++++++++++++++++
 .../spark/mllib/feature/ChiSqSelector.scala   |   2 +
 .../spark/ml/feature/ChiSqSelectorSuite.scala |  61 +++++++
 3 files changed, 213 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
new file mode 100644
index 000000000000..5e4061fba549
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
@@ -0,0 +1,150 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml._
+import org.apache.spark.ml.attribute.{AttributeGroup, _}
+import org.apache.spark.ml.param._
+import org.apache.spark.ml.param.shared._
+import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util.SchemaUtils
+import org.apache.spark.mllib.feature
+import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.sql._
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.types.{DoubleType, StructField, StructType}
+
+/**
+ * Params for [[ChiSqSelector]] and [[ChiSqSelectorModel]].
+ */
+private[feature] trait ChiSqSelectorParams extends Params
+  with HasFeaturesCol with HasOutputCol with HasLabelCol {
+
+  /**
+   * Number of features that selector will select (ordered by statistic value descending). If the
+   * number of features is < numTopFeatures, then this will select all features. The default value
+   * of numTopFeatures is 50.
+   * @group param
+   */
+  final val numTopFeatures = new IntParam(this, "numTopFeatures",
+    "Number of features that selector will select, ordered by statistics value descending. If the" +
+      " number of features is < numTopFeatures, then this will select all features.",
+    ParamValidators.gtEq(1))
+  setDefault(numTopFeatures -> 50)
+
+  /** @group getParam */
+  def getNumTopFeatures: Int = $(numTopFeatures)
+}
+
+/**
+ * :: Experimental ::
+ * Chi-Squared feature selection, which selects categorical features to use for predicting a
+ * categorical label.
+ */
+@Experimental
+final class ChiSqSelector(override val uid: String)
+  extends Estimator[ChiSqSelectorModel] with ChiSqSelectorParams {
+
+  def this() = this(Identifiable.randomUID("chiSqSelector"))
+
+  /** @group setParam */
+  def setNumTopFeatures(value: Int): this.type = set(numTopFeatures, value)
+
+  /** @group setParam */
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  def setOutputCol(value: String): this.type = set(outputCol, value)
+
+  /** @group setParam */
+  def setLabelCol(value: String): this.type = set(labelCol, value)
+
+  override def fit(dataset: DataFrame): ChiSqSelectorModel = {
+    transformSchema(dataset.schema, logging = true)
+    val input = dataset.select($(labelCol), $(featuresCol)).map {
+      case Row(label: Double, features: Vector) =>
+        LabeledPoint(label, features)
+    }
+    val chiSqSelector = new feature.ChiSqSelector($(numTopFeatures)).fit(input)
+    copyValues(new ChiSqSelectorModel(uid, chiSqSelector).setParent(this))
+  }
+
+  override def transformSchema(schema: StructType): StructType = {
+    SchemaUtils.checkColumnType(schema, $(featuresCol), new VectorUDT)
+    SchemaUtils.checkColumnType(schema, $(labelCol), DoubleType)
+    SchemaUtils.appendColumn(schema, $(outputCol), new VectorUDT)
+  }
+
+  override def copy(extra: ParamMap): ChiSqSelector = defaultCopy(extra)
+}
+
+/**
+ * :: Experimental ::
+ * Model fitted by [[ChiSqSelector]].
+ */
+@Experimental
+final class ChiSqSelectorModel private[ml] (
+    override val uid: String,
+    private val chiSqSelector: feature.ChiSqSelectorModel)
+  extends Model[ChiSqSelectorModel] with ChiSqSelectorParams {
+
+  /** @group setParam */
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  def setOutputCol(value: String): this.type = set(outputCol, value)
+
+  /** @group setParam */
+  def setLabelCol(value: String): this.type = set(labelCol, value)
+
+  override def transform(dataset: DataFrame): DataFrame = {
+    val transformedSchema = transformSchema(dataset.schema, logging = true)
+    val newField = transformedSchema.last
+    val selector = udf { chiSqSelector.transform _ }
+    dataset.withColumn($(outputCol), selector(col($(featuresCol))), newField.metadata)
+  }
+
+  override def transformSchema(schema: StructType): StructType = {
+    SchemaUtils.checkColumnType(schema, $(featuresCol), new VectorUDT)
+    val newField = prepOutputField(schema)
+    val outputFields = schema.fields :+ newField
+    StructType(outputFields)
+  }
+
+  /**
+   * Prepare the output column field, including per-feature metadata.
+   */
+  private def prepOutputField(schema: StructType): StructField = {
+    val selector = chiSqSelector.selectedFeatures.toSet
+    val origAttrGroup = AttributeGroup.fromStructField(schema($(featuresCol)))
+    val featureAttributes: Array[Attribute] = if (origAttrGroup.attributes.nonEmpty) {
+      origAttrGroup.attributes.get.zipWithIndex.filter(x => selector.contains(x._2)).map(_._1)
+    } else {
+      Array.fill[Attribute](selector.size)(NominalAttribute.defaultAttr)
+    }
+    val newAttributeGroup = new AttributeGroup($(outputCol), featureAttributes)
+    newAttributeGroup.toStructField()
+  }
+
+  override def copy(extra: ParamMap): ChiSqSelectorModel = {
+    val copied = new ChiSqSelectorModel(uid, chiSqSelector)
+    copyValues(copied, extra).setParent(parent)
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
index 4743cfd1a2c3..b1524cf37780 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
@@ -109,6 +109,8 @@ class ChiSqSelectorModel @Since("1.3.0") (
  * Creates a ChiSquared feature selector.
  * @param numTopFeatures number of features that selector will select
  *                       (ordered by statistic value descending)
+ *                       Note that if the number of features is < numTopFeatures, then this will
+ *                       select all features.
  */
 @Since("1.3.0")
 @Experimental
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala
new file mode 100644
index 000000000000..e5a42967bd2c
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.mllib.util.TestingUtils._
+import org.apache.spark.sql.{Row, SQLContext}
+
+class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext {
+  test("Test Chi-Square selector") {
+    val sqlContext = SQLContext.getOrCreate(sc)
+    import sqlContext.implicits._
+
+    val data = Seq(
+      LabeledPoint(0.0, Vectors.sparse(3, Array((0, 8.0), (1, 7.0)))),
+      LabeledPoint(1.0, Vectors.sparse(3, Array((1, 9.0), (2, 6.0)))),
+      LabeledPoint(1.0, Vectors.dense(Array(0.0, 9.0, 8.0))),
+      LabeledPoint(2.0, Vectors.dense(Array(8.0, 9.0, 5.0)))
+    )
+
+    val preFilteredData = Seq(
+      Vectors.dense(0.0),
+      Vectors.dense(6.0),
+      Vectors.dense(8.0),
+      Vectors.dense(5.0)
+    )
+
+    val df = sc.parallelize(data.zip(preFilteredData))
+      .map(x => (x._1.label, x._1.features, x._2))
+      .toDF("label", "data", "preFilteredData")
+
+    val model = new ChiSqSelector()
+      .setNumTopFeatures(1)
+      .setFeaturesCol("data")
+      .setLabelCol("label")
+      .setOutputCol("filtered")
+
+    model.fit(df).transform(df).select("filtered", "preFilteredData").collect().foreach {
+      case Row(vec1: Vector, vec2: Vector) =>
+        assert(vec1 ~== vec2 absTol 1e-1)
+    }
+  }
+}

From b0baa11d3bb0e1e44553989b91a5efb9d04bc594 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 2 Oct 2015 11:23:08 -0700
Subject: [PATCH 133/896] [HOT-FIX] Fix style.

https://github.com/apache/spark/pull/8882 broke our build.

Author: Yin Huai <yhuai@databricks.com>

Closes #8964 from yhuai/fixStyle.
---
 .../scala/org/apache/spark/ml/tuning/CrossValidator.scala     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
index 820c9965d09b..77d9948ed86b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
@@ -138,8 +138,8 @@ class CrossValidator(override val uid: String) extends Estimator[CrossValidatorM
  * Model from k-fold cross validation.
  *
  * @param bestModel The best model selected from k-fold cross validation.
- * @param avgMetrics Average cross-validation metrics for each paramMap in [[estimatorParamMaps]], in the
- *                   corresponding order.
+ * @param avgMetrics Average cross-validation metrics for each paramMap in
+ *                   [[estimatorParamMaps]], in the corresponding order.
  */
 @Experimental
 class CrossValidatorModel private[ml] (

From f85aa06464a10f5d1563302fd76465dded475a12 Mon Sep 17 00:00:00 2001
From: Joshi <rekhajoshm@gmail.com>
Date: Fri, 2 Oct 2015 15:26:11 -0700
Subject: [PATCH 134/896] [SPARK-10317] [CORE] Compatibility between history
 server script and functionality

Compatibility between history server script and functionality

The history server has its argument parsing class in HistoryServerArguments. However, this doesn't get involved in the start-history-server.sh codepath where the $0 arg is assigned to spark.history.fs.logDirectory and all other arguments discarded (e.g --property-file.)
This stops the other options being usable from this script

Author: Joshi <rekhajoshm@gmail.com>
Author: Rekha Joshi <rekhajoshm@gmail.com>

Closes #8758 from rekhajoshm/SPARK-10317.
---
 .../history/HistoryServerArguments.scala      | 40 +++++++----
 .../history/HistoryServerArgumentsSuite.scala | 70 +++++++++++++++++++
 sbin/start-history-server.sh                  |  8 +--
 3 files changed, 96 insertions(+), 22 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/deploy/history/HistoryServerArgumentsSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/HistoryServerArguments.scala b/core/src/main/scala/org/apache/spark/deploy/history/HistoryServerArguments.scala
index 18265df9faa2..d03bab3820bb 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/HistoryServerArguments.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/HistoryServerArguments.scala
@@ -30,28 +30,35 @@ private[history] class HistoryServerArguments(conf: SparkConf, args: Array[Strin
   parse(args.toList)
 
   private def parse(args: List[String]): Unit = {
-    args match {
-      case ("--dir" | "-d") :: value :: tail =>
-        logWarning("Setting log directory through the command line is deprecated as of " +
-          "Spark 1.1.0. Please set this through spark.history.fs.logDirectory instead.")
-        conf.set("spark.history.fs.logDirectory", value)
-        System.setProperty("spark.history.fs.logDirectory", value)
-        parse(tail)
+    if (args.length == 1) {
+      setLogDirectory(args.head)
+    } else {
+      args match {
+        case ("--dir" | "-d") :: value :: tail =>
+          setLogDirectory(value)
+          parse(tail)
 
-      case ("--help" | "-h") :: tail =>
-        printUsageAndExit(0)
+        case ("--help" | "-h") :: tail =>
+          printUsageAndExit(0)
 
-      case ("--properties-file") :: value :: tail =>
-        propertiesFile = value
-        parse(tail)
+        case ("--properties-file") :: value :: tail =>
+          propertiesFile = value
+          parse(tail)
 
-      case Nil =>
+        case Nil =>
 
-      case _ =>
-        printUsageAndExit(1)
+        case _ =>
+          printUsageAndExit(1)
+      }
     }
   }
 
+  private def setLogDirectory(value: String): Unit = {
+    logWarning("Setting log directory through the command line is deprecated as of " +
+      "Spark 1.1.0. Please set this through spark.history.fs.logDirectory instead.")
+    conf.set("spark.history.fs.logDirectory", value)
+  }
+
    // This mutates the SparkConf, so all accesses to it must be made after this line
    Utils.loadDefaultSparkProperties(conf, propertiesFile)
 
@@ -62,6 +69,8 @@ private[history] class HistoryServerArguments(conf: SparkConf, args: Array[Strin
       |Usage: HistoryServer [options]
       |
       |Options:
+      |  DIR                         Deprecated; set spark.history.fs.logDirectory directly
+      |  --dir DIR (-d DIR)          Deprecated; set spark.history.fs.logDirectory directly
       |  --properties-file FILE      Path to a custom Spark properties file.
       |                              Default is conf/spark-defaults.conf.
       |
@@ -90,3 +99,4 @@ private[history] class HistoryServerArguments(conf: SparkConf, args: Array[Strin
   }
 
 }
+
diff --git a/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerArgumentsSuite.scala b/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerArgumentsSuite.scala
new file mode 100644
index 000000000000..34f27ecaa07a
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerArgumentsSuite.scala
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.deploy.history
+
+import java.io.File
+import java.nio.charset.StandardCharsets._
+
+import com.google.common.io.Files
+
+import org.apache.spark._
+import org.apache.spark.util.Utils
+
+class HistoryServerArgumentsSuite extends SparkFunSuite {
+
+  private val logDir = new File("src/test/resources/spark-events")
+  private val conf = new SparkConf()
+    .set("spark.history.fs.logDirectory", logDir.getAbsolutePath)
+    .set("spark.history.fs.updateInterval", "1")
+    .set("spark.testing", "true")
+
+  test("No Arguments Parsing") {
+    val argStrings = Array[String]()
+    val hsa = new HistoryServerArguments(conf, argStrings)
+    assert(conf.get("spark.history.fs.logDirectory") === logDir.getAbsolutePath)
+    assert(conf.get("spark.history.fs.updateInterval") === "1")
+    assert(conf.get("spark.testing") === "true")
+  }
+
+  test("Directory Arguments Parsing --dir or -d") {
+    val argStrings = Array("--dir", "src/test/resources/spark-events1")
+    val hsa = new HistoryServerArguments(conf, argStrings)
+    assert(conf.get("spark.history.fs.logDirectory") === "src/test/resources/spark-events1")
+  }
+
+  test("Directory Param can also be set directly") {
+    val argStrings = Array("src/test/resources/spark-events2")
+    val hsa = new HistoryServerArguments(conf, argStrings)
+    assert(conf.get("spark.history.fs.logDirectory") === "src/test/resources/spark-events2")
+  }
+
+  test("Properties File Arguments Parsing --properties-file") {
+    val tmpDir = Utils.createTempDir()
+    val outFile = File.createTempFile("test-load-spark-properties", "test", tmpDir)
+    try {
+      Files.write("spark.test.CustomPropertyA blah\n" +
+        "spark.test.CustomPropertyB notblah\n", outFile, UTF_8)
+      val argStrings = Array("--properties-file", outFile.getAbsolutePath)
+      val hsa = new HistoryServerArguments(conf, argStrings)
+      assert(conf.get("spark.test.CustomPropertyA") === "blah")
+      assert(conf.get("spark.test.CustomPropertyB") === "notblah")
+    } finally {
+      Utils.deleteRecursively(tmpDir)
+    }
+  }
+
+}
diff --git a/sbin/start-history-server.sh b/sbin/start-history-server.sh
index 7172ad15d88f..9034e5715cc8 100755
--- a/sbin/start-history-server.sh
+++ b/sbin/start-history-server.sh
@@ -30,10 +30,4 @@ sbin="`cd "$sbin"; pwd`"
 . "$sbin/spark-config.sh"
 . "$SPARK_PREFIX/bin/load-spark-env.sh"
 
-if [ $# != 0 ]; then
-  echo "Using command line arguments for setting the log directory is deprecated. Please "
-  echo "set the spark.history.fs.logDirectory configuration option instead."
-  export SPARK_HISTORY_OPTS="$SPARK_HISTORY_OPTS -Dspark.history.fs.logDirectory=$1"
-fi
-
-exec "$sbin"/spark-daemon.sh start org.apache.spark.deploy.history.HistoryServer 1
+exec "$sbin"/spark-daemon.sh start org.apache.spark.deploy.history.HistoryServer 1 $@

From 314bc68435ac3901a97724b9eccd1daf8f89578e Mon Sep 17 00:00:00 2001
From: gweidner <gweidner@us.ibm.com>
Date: Sat, 3 Oct 2015 01:04:14 -0700
Subject: [PATCH 135/896] [SPARK-7275] [SQL] Make LogicalRelation public

Given LogicalRelation (and other classes) were moved from sources package to execution.sources package, removed private[sql] to make LogicalRelation public to facilitate access for data sources.

Author: gweidner <gweidner@us.ibm.com>

Closes #8965 from gweidner/SPARK-7275.
---
 .../spark/sql/execution/datasources/LogicalRelation.scala       | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
index 4069179aa734..783252e0a297 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
@@ -28,7 +28,7 @@ import org.apache.spark.sql.sources.BaseRelation
  * changing the output attributes' IDs.  The `expectedOutputAttributes` parameter is used for
  * this purpose.  See https://issues.apache.org/jira/browse/SPARK-10741 for more details.
  */
-private[sql] case class LogicalRelation(
+case class LogicalRelation(
     relation: BaseRelation,
     expectedOutputAttributes: Option[Seq[Attribute]] = None)
   extends LeafNode with MultiInstanceRelation {

From 107320c9bbfe2496963a4e75e60fd6ba7fbfbabc Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Sat, 3 Oct 2015 01:04:35 -0700
Subject: [PATCH 136/896] [SPARK-6028] [CORE] Remerge #6457: new RPC
 implemetation and also pick #8905

This PR just reverted https://github.com/apache/spark/commit/02144d6745ec0a6d8877d969feb82139bd22437f to remerge #6457 and also included the commits in #8905.

Author: zsxwing <zsxwing@gmail.com>

Closes #8944 from zsxwing/SPARK-6028.
---
 .../org/apache/spark/MapOutputTracker.scala   |   2 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  20 +-
 .../apache/spark/deploy/worker/Worker.scala   |   2 +-
 .../spark/deploy/worker/WorkerWatcher.scala   |  13 +-
 .../org/apache/spark/rpc/RpcCallContext.scala |   2 +-
 .../org/apache/spark/rpc/RpcEndpoint.scala    |  51 +-
 .../rpc/RpcEndpointNotFoundException.scala    |  22 +
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |   5 +-
 .../apache/spark/rpc/akka/AkkaRpcEnv.scala    |   6 +-
 .../apache/spark/rpc/netty/Dispatcher.scala   | 218 ++++++++
 .../apache/spark/rpc/netty/IDVerifier.scala   |  39 ++
 .../org/apache/spark/rpc/netty/Inbox.scala    | 227 ++++++++
 .../spark/rpc/netty/NettyRpcAddress.scala     |  56 ++
 .../spark/rpc/netty/NettyRpcCallContext.scala |  87 +++
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 504 ++++++++++++++++++
 .../storage/BlockManagerSlaveEndpoint.scala   |   6 +-
 .../org/apache/spark/util/ThreadUtils.scala   |   6 +-
 .../apache/spark/MapOutputTrackerSuite.scala  |  10 +-
 .../org/apache/spark/SSLSampleConfigs.scala   |   2 +
 .../deploy/worker/WorkerWatcherSuite.scala    |   6 +-
 .../org/apache/spark/rpc/RpcEnvSuite.scala    |  81 ++-
 .../apache/spark/rpc/TestRpcEndpoint.scala    | 123 +++++
 .../apache/spark/rpc/netty/InboxSuite.scala   | 150 ++++++
 .../rpc/netty/NettyRpcAddressSuite.scala      |  29 +
 .../spark/rpc/netty/NettyRpcEnvSuite.scala    |  38 ++
 .../rpc/netty/NettyRpcHandlerSuite.scala      |  67 +++
 .../spark/network/client/TransportClient.java |   4 +
 .../spark/network/server/RpcHandler.java      |   2 +
 .../server/TransportRequestHandler.java       |   1 +
 .../streaming/scheduler/ReceiverTracker.scala |   2 +-
 .../spark/deploy/yarn/ApplicationMaster.scala |   5 +-
 31 files changed, 1715 insertions(+), 71 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
index e4cb72e39d7e..45e12e40c837 100644
--- a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
+++ b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
@@ -45,7 +45,7 @@ private[spark] class MapOutputTrackerMasterEndpoint(
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
     case GetMapOutputStatuses(shuffleId: Int) =>
-      val hostPort = context.sender.address.hostPort
+      val hostPort = context.senderAddress.hostPort
       logInfo("Asked to send map output locations for shuffle " + shuffleId + " to " + hostPort)
       val mapOutputStatuses = tracker.getSerializedMapOutputStatuses(shuffleId)
       val serializedSize = mapOutputStatuses.size
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index c6fef7f91f00..cfde27fb2e7d 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -20,11 +20,10 @@ package org.apache.spark
 import java.io.File
 import java.net.Socket
 
-import akka.actor.ActorSystem
-
 import scala.collection.mutable
 import scala.util.Properties
 
+import akka.actor.ActorSystem
 import com.google.common.collect.MapMaker
 
 import org.apache.spark.annotation.DeveloperApi
@@ -41,7 +40,7 @@ import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.{ShuffleMemoryManager, ShuffleManager}
 import org.apache.spark.storage._
 import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator}
-import org.apache.spark.util.{RpcUtils, Utils}
+import org.apache.spark.util.{AkkaUtils, RpcUtils, Utils}
 
 /**
  * :: DeveloperApi ::
@@ -57,6 +56,7 @@ import org.apache.spark.util.{RpcUtils, Utils}
 class SparkEnv (
     val executorId: String,
     private[spark] val rpcEnv: RpcEnv,
+    _actorSystem: ActorSystem, // TODO Remove actorSystem
     val serializer: Serializer,
     val closureSerializer: Serializer,
     val cacheManager: CacheManager,
@@ -76,7 +76,7 @@ class SparkEnv (
 
   // TODO Remove actorSystem
   @deprecated("Actor system is no longer supported as of 1.4.0", "1.4.0")
-  val actorSystem: ActorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+  val actorSystem: ActorSystem = _actorSystem
 
   private[spark] var isStopped = false
   private val pythonWorkers = mutable.HashMap[(String, Map[String, String]), PythonWorkerFactory]()
@@ -100,6 +100,9 @@ class SparkEnv (
       blockManager.master.stop()
       metricsSystem.stop()
       outputCommitCoordinator.stop()
+      if (!rpcEnv.isInstanceOf[AkkaRpcEnv]) {
+        actorSystem.shutdown()
+      }
       rpcEnv.shutdown()
 
       // Unfortunately Akka's awaitTermination doesn't actually wait for the Netty server to shut
@@ -249,7 +252,13 @@ object SparkEnv extends Logging {
     // Create the ActorSystem for Akka and get the port it binds to.
     val actorSystemName = if (isDriver) driverActorSystemName else executorActorSystemName
     val rpcEnv = RpcEnv.create(actorSystemName, hostname, port, conf, securityManager)
-    val actorSystem = rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+    val actorSystem: ActorSystem =
+      if (rpcEnv.isInstanceOf[AkkaRpcEnv]) {
+        rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
+      } else {
+        // Create a ActorSystem for legacy codes
+        AkkaUtils.createActorSystem(actorSystemName, hostname, port, conf, securityManager)._1
+      }
 
     // Figure out which port Akka actually bound to in case the original port is 0 or occupied.
     if (isDriver) {
@@ -395,6 +404,7 @@ object SparkEnv extends Logging {
     val envInstance = new SparkEnv(
       executorId,
       rpcEnv,
+      actorSystem,
       serializer,
       closureSerializer,
       cacheManager,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
index 770927c80f7a..93a1b3f31042 100755
--- a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
@@ -329,7 +329,7 @@ private[deploy] class Worker(
         registrationRetryTimer = Some(forwordMessageScheduler.scheduleAtFixedRate(
           new Runnable {
             override def run(): Unit = Utils.tryLogNonFatalError {
-              self.send(ReregisterWithMaster)
+              Option(self).foreach(_.send(ReregisterWithMaster))
             }
           },
           INITIAL_REGISTRATION_RETRY_INTERVAL_SECONDS,
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
index 735c4f092715..ab56fde938ba 100644
--- a/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/WorkerWatcher.scala
@@ -24,14 +24,13 @@ import org.apache.spark.rpc._
  * Actor which connects to a worker process and terminates the JVM if the connection is severed.
  * Provides fate sharing between a worker and its associated child processes.
  */
-private[spark] class WorkerWatcher(override val rpcEnv: RpcEnv, workerUrl: String)
+private[spark] class WorkerWatcher(
+    override val rpcEnv: RpcEnv, workerUrl: String, isTesting: Boolean = false)
   extends RpcEndpoint with Logging {
 
-  override def onStart() {
-    logInfo(s"Connecting to worker $workerUrl")
-    if (!isTesting) {
-      rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
-    }
+  logInfo(s"Connecting to worker $workerUrl")
+  if (!isTesting) {
+    rpcEnv.asyncSetupEndpointRefByURI(workerUrl)
   }
 
   // Used to avoid shutting down JVM during tests
@@ -40,8 +39,6 @@ private[spark] class WorkerWatcher(override val rpcEnv: RpcEnv, workerUrl: Strin
   // true rather than calling `System.exit`. The user can check `isShutDown` to know if
   // `exitNonZero` is called.
   private[deploy] var isShutDown = false
-  private[deploy] def setTesting(testing: Boolean) = isTesting = testing
-  private var isTesting = false
 
   // Lets filter events only from the worker's rpc system
   private val expectedAddress = RpcAddress.fromURIString(workerUrl)
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
index 3e5b64265e91..f527ec86ab7b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcCallContext.scala
@@ -37,5 +37,5 @@ private[spark] trait RpcCallContext {
   /**
    * The sender of this message.
    */
-  def sender: RpcEndpointRef
+  def senderAddress: RpcAddress
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
index dfcbc51cdf61..f1ddc6d2cd43 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
@@ -28,20 +28,6 @@ private[spark] trait RpcEnvFactory {
   def create(config: RpcEnvConfig): RpcEnv
 }
 
-/**
- * A trait that requires RpcEnv thread-safely sending messages to it.
- *
- * Thread-safety means processing of one message happens before processing of the next message by
- * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
- * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
- * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
- *
- * However, there is no guarantee that the same thread will be executing the same
- * [[ThreadSafeRpcEndpoint]] for different messages.
- */
-private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint
-
-
 /**
  * An end point for the RPC that defines what functions to trigger given a message.
  *
@@ -101,38 +87,39 @@ private[spark] trait RpcEndpoint {
   }
 
   /**
-   * Invoked before [[RpcEndpoint]] starts to handle any message.
+   * Invoked when `remoteAddress` is connected to the current node.
    */
-  def onStart(): Unit = {
+  def onConnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when [[RpcEndpoint]] is stopping.
+   * Invoked when `remoteAddress` is lost.
    */
-  def onStop(): Unit = {
+  def onDisconnected(remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when `remoteAddress` is connected to the current node.
+   * Invoked when some network error happens in the connection between the current node and
+   * `remoteAddress`.
    */
-  def onConnected(remoteAddress: RpcAddress): Unit = {
+  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when `remoteAddress` is lost.
+   * Invoked before [[RpcEndpoint]] starts to handle any message.
    */
-  def onDisconnected(remoteAddress: RpcAddress): Unit = {
+  def onStart(): Unit = {
     // By default, do nothing.
   }
 
   /**
-   * Invoked when some network error happens in the connection between the current node and
-   * `remoteAddress`.
+   * Invoked when [[RpcEndpoint]] is stopping. `self` will be `null` in this method and you cannot
+   * use it to send or ask messages.
    */
-  def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+  def onStop(): Unit = {
     // By default, do nothing.
   }
 
@@ -146,3 +133,17 @@ private[spark] trait RpcEndpoint {
     }
   }
 }
+
+/**
+ * A trait that requires RpcEnv thread-safely sending messages to it.
+ *
+ * Thread-safety means processing of one message happens before processing of the next message by
+ * the same [[ThreadSafeRpcEndpoint]]. In the other words, changes to internal fields of a
+ * [[ThreadSafeRpcEndpoint]] are visible when processing the next message, and fields in the
+ * [[ThreadSafeRpcEndpoint]] need not be volatile or equivalent.
+ *
+ * However, there is no guarantee that the same thread will be executing the same
+ * [[ThreadSafeRpcEndpoint]] for different messages.
+ */
+private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint {
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
new file mode 100644
index 000000000000..d177881fb305
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointNotFoundException.scala
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc
+
+import org.apache.spark.SparkException
+
+private[rpc] class RpcEndpointNotFoundException(uri: String)
+  extends SparkException(s"Cannot find endpoint: $uri")
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index 29debe808130..35e402c72533 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -36,8 +36,9 @@ private[spark] object RpcEnv {
 
   private def getRpcEnvFactory(conf: SparkConf): RpcEnvFactory = {
     // Add more RpcEnv implementations here
-    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory")
-    val rpcEnvName = conf.get("spark.rpc", "akka")
+    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory",
+      "netty" -> "org.apache.spark.rpc.netty.NettyRpcEnvFactory")
+    val rpcEnvName = conf.get("spark.rpc", "netty")
     val rpcEnvFactoryClassName = rpcEnvNames.getOrElse(rpcEnvName.toLowerCase, rpcEnvName)
     Utils.classForName(rpcEnvFactoryClassName).newInstance().asInstanceOf[RpcEnvFactory]
   }
diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index ad67e1c5ad4d..95132a4e4a0b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -166,9 +166,9 @@ private[spark] class AkkaRpcEnv private[akka] (
             _sender ! AkkaMessage(response, false)
           }
 
-          // Some RpcEndpoints need to know the sender's address
-          override val sender: RpcEndpointRef =
-            new AkkaRpcEndpointRef(defaultAddress, _sender, conf)
+          // Use "lazy" because most of RpcEndpoints don't need "senderAddress"
+          override lazy val senderAddress: RpcAddress =
+            new AkkaRpcEndpointRef(defaultAddress, _sender, conf).address
         })
       } else {
         endpoint.receive
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
new file mode 100644
index 000000000000..d71e6f01dbb2
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -0,0 +1,218 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.concurrent.{ConcurrentHashMap, LinkedBlockingQueue, TimeUnit}
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.JavaConverters._
+import scala.concurrent.Promise
+import scala.util.control.NonFatal
+
+import org.apache.spark.{SparkException, Logging}
+import org.apache.spark.network.client.RpcResponseCallback
+import org.apache.spark.rpc._
+import org.apache.spark.util.ThreadUtils
+
+private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
+
+  private class EndpointData(
+      val name: String,
+      val endpoint: RpcEndpoint,
+      val ref: NettyRpcEndpointRef) {
+    val inbox = new Inbox(ref, endpoint)
+  }
+
+  private val endpoints = new ConcurrentHashMap[String, EndpointData]()
+  private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]()
+
+  // Track the receivers whose inboxes may contain messages.
+  private val receivers = new LinkedBlockingQueue[EndpointData]()
+
+  @GuardedBy("this")
+  private var stopped = false
+
+  def registerRpcEndpoint(name: String, endpoint: RpcEndpoint): NettyRpcEndpointRef = {
+    val addr = new NettyRpcAddress(nettyEnv.address.host, nettyEnv.address.port, name)
+    val endpointRef = new NettyRpcEndpointRef(nettyEnv.conf, addr, nettyEnv)
+    synchronized {
+      if (stopped) {
+        throw new IllegalStateException("RpcEnv has been stopped")
+      }
+      if (endpoints.putIfAbsent(name, new EndpointData(name, endpoint, endpointRef)) != null) {
+        throw new IllegalArgumentException(s"There is already an RpcEndpoint called $name")
+      }
+      val data = endpoints.get(name)
+      endpointRefs.put(data.endpoint, data.ref)
+      receivers.put(data)
+    }
+    endpointRef
+  }
+
+  def getRpcEndpointRef(endpoint: RpcEndpoint): RpcEndpointRef = endpointRefs.get(endpoint)
+
+  def removeRpcEndpointRef(endpoint: RpcEndpoint): Unit = endpointRefs.remove(endpoint)
+
+  // Should be idempotent
+  private def unregisterRpcEndpoint(name: String): Unit = {
+    val data = endpoints.remove(name)
+    if (data != null) {
+      data.inbox.stop()
+      receivers.put(data)
+    }
+    // Don't clean `endpointRefs` here because it's possible that some messages are being processed
+    // now and they can use `getRpcEndpointRef`. So `endpointRefs` will be cleaned in Inbox via
+    // `removeRpcEndpointRef`.
+  }
+
+  def stop(rpcEndpointRef: RpcEndpointRef): Unit = {
+    synchronized {
+      if (stopped) {
+        // This endpoint will be stopped by Dispatcher.stop() method.
+        return
+      }
+      unregisterRpcEndpoint(rpcEndpointRef.name)
+    }
+  }
+
+  /**
+   * Send a message to all registered [[RpcEndpoint]]s.
+   * @param message
+   */
+  def broadcastMessage(message: InboxMessage): Unit = {
+    val iter = endpoints.keySet().iterator()
+    while (iter.hasNext) {
+      val name = iter.next
+      postMessageToInbox(name, (_) => message,
+        () => { logWarning(s"Drop ${message} because ${name} has been stopped") })
+    }
+  }
+
+  def postMessage(message: RequestMessage, callback: RpcResponseCallback): Unit = {
+    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
+      val rpcCallContext =
+        new RemoteNettyRpcCallContext(
+          nettyEnv, sender, callback, message.senderAddress, message.needReply)
+      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
+    }
+
+    def onEndpointStopped(): Unit = {
+      callback.onFailure(
+        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
+    }
+
+    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+  }
+
+  def postMessage(message: RequestMessage, p: Promise[Any]): Unit = {
+    def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
+      val rpcCallContext =
+        new LocalNettyRpcCallContext(sender, message.senderAddress, message.needReply, p)
+      ContentMessage(message.senderAddress, message.content, message.needReply, rpcCallContext)
+    }
+
+    def onEndpointStopped(): Unit = {
+      p.tryFailure(
+        new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
+    }
+
+    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+  }
+
+  private def postMessageToInbox(
+      endpointName: String,
+      createMessageFn: NettyRpcEndpointRef => InboxMessage,
+      onStopped: () => Unit): Unit = {
+    val shouldCallOnStop =
+      synchronized {
+        val data = endpoints.get(endpointName)
+        if (stopped || data == null) {
+          true
+        } else {
+          data.inbox.post(createMessageFn(data.ref))
+          receivers.put(data)
+          false
+        }
+      }
+    if (shouldCallOnStop) {
+      // We don't need to call `onStop` in the `synchronized` block
+      onStopped()
+    }
+  }
+
+  private val parallelism = nettyEnv.conf.getInt("spark.rpc.netty.dispatcher.parallelism",
+    Runtime.getRuntime.availableProcessors())
+
+  private val executor = ThreadUtils.newDaemonFixedThreadPool(parallelism, "dispatcher-event-loop")
+
+  (0 until parallelism) foreach { _ =>
+    executor.execute(new MessageLoop)
+  }
+
+  def stop(): Unit = {
+    synchronized {
+      if (stopped) {
+        return
+      }
+      stopped = true
+    }
+    // Stop all endpoints. This will queue all endpoints for processing by the message loops.
+    endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
+    // Enqueue a message that tells the message loops to stop.
+    receivers.put(PoisonEndpoint)
+    executor.shutdown()
+  }
+
+  def awaitTermination(): Unit = {
+    executor.awaitTermination(Long.MaxValue, TimeUnit.MILLISECONDS)
+  }
+
+  /**
+   * Return if the endpoint exists
+   */
+  def verify(name: String): Boolean = {
+    endpoints.containsKey(name)
+  }
+
+  private class MessageLoop extends Runnable {
+    override def run(): Unit = {
+      try {
+        while (true) {
+          try {
+            val data = receivers.take()
+            if (data == PoisonEndpoint) {
+              // Put PoisonEndpoint back so that other MessageLoops can see it.
+              receivers.put(PoisonEndpoint)
+              return
+            }
+            data.inbox.process(Dispatcher.this)
+          } catch {
+            case NonFatal(e) => logError(e.getMessage, e)
+          }
+        }
+      } catch {
+        case ie: InterruptedException => // exit
+      }
+    }
+  }
+
+  /**
+   * A poison endpoint that indicates MessageLoop should exit its loop.
+   */
+  private val PoisonEndpoint = new EndpointData(null, null, null)
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
new file mode 100644
index 000000000000..6061c9b8de94
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
@@ -0,0 +1,39 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.rpc.{RpcCallContext, RpcEndpoint, RpcEnv}
+
+/**
+ * A message used to ask the remote [[IDVerifier]] if an [[RpcEndpoint]] exists
+ */
+private[netty] case class ID(name: String)
+
+/**
+ * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if a [[RpcEndpoint]] exists in this [[RpcEnv]]
+ */
+private[netty] class IDVerifier(
+    override val rpcEnv: RpcEnv, dispatcher: Dispatcher) extends RpcEndpoint {
+
+  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+    case ID(name) => context.reply(dispatcher.verify(name))
+  }
+}
+
+private[netty] object IDVerifier {
+  val NAME = "id-verifier"
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
new file mode 100644
index 000000000000..b669f59a2884
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
@@ -0,0 +1,227 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.LinkedList
+import javax.annotation.concurrent.GuardedBy
+
+import scala.util.control.NonFatal
+
+import org.apache.spark.{Logging, SparkException}
+import org.apache.spark.rpc.{RpcAddress, RpcEndpoint, ThreadSafeRpcEndpoint}
+
+private[netty] sealed trait InboxMessage
+
+private[netty] case class ContentMessage(
+    senderAddress: RpcAddress,
+    content: Any,
+    needReply: Boolean,
+    context: NettyRpcCallContext) extends InboxMessage
+
+private[netty] case object OnStart extends InboxMessage
+
+private[netty] case object OnStop extends InboxMessage
+
+/**
+ * A broadcast message that indicates connecting to a remote node.
+ */
+private[netty] case class Associated(remoteAddress: RpcAddress) extends InboxMessage
+
+/**
+ * A broadcast message that indicates a remote connection is lost.
+ */
+private[netty] case class Disassociated(remoteAddress: RpcAddress) extends InboxMessage
+
+/**
+ * A broadcast message that indicates a network error
+ */
+private[netty] case class AssociationError(cause: Throwable, remoteAddress: RpcAddress)
+  extends InboxMessage
+
+/**
+ * A inbox that stores messages for an [[RpcEndpoint]] and posts messages to it thread-safely.
+ * @param endpointRef
+ * @param endpoint
+ */
+private[netty] class Inbox(
+    val endpointRef: NettyRpcEndpointRef,
+    val endpoint: RpcEndpoint) extends Logging {
+
+  inbox =>
+
+  @GuardedBy("this")
+  protected val messages = new LinkedList[InboxMessage]()
+
+  @GuardedBy("this")
+  private var stopped = false
+
+  @GuardedBy("this")
+  private var enableConcurrent = false
+
+  @GuardedBy("this")
+  private var workerCount = 0
+
+  // OnStart should be the first message to process
+  inbox.synchronized {
+    messages.add(OnStart)
+  }
+
+  /**
+   * Process stored messages.
+   */
+  def process(dispatcher: Dispatcher): Unit = {
+    var message: InboxMessage = null
+    inbox.synchronized {
+      if (!enableConcurrent && workerCount != 0) {
+        return
+      }
+      message = messages.poll()
+      if (message != null) {
+        workerCount += 1
+      } else {
+        return
+      }
+    }
+    while (true) {
+      safelyCall(endpoint) {
+        message match {
+          case ContentMessage(_sender, content, needReply, context) =>
+            val pf: PartialFunction[Any, Unit] =
+              if (needReply) {
+                endpoint.receiveAndReply(context)
+              } else {
+                endpoint.receive
+              }
+            try {
+              pf.applyOrElse[Any, Unit](content, { msg =>
+                throw new SparkException(s"Unmatched message $message from ${_sender}")
+              })
+              if (!needReply) {
+                context.finish()
+              }
+            } catch {
+              case NonFatal(e) =>
+                if (needReply) {
+                  // If the sender asks a reply, we should send the error back to the sender
+                  context.sendFailure(e)
+                } else {
+                  context.finish()
+                  throw e
+                }
+            }
+
+          case OnStart => {
+            endpoint.onStart()
+            if (!endpoint.isInstanceOf[ThreadSafeRpcEndpoint]) {
+              inbox.synchronized {
+                if (!stopped) {
+                  enableConcurrent = true
+                }
+              }
+            }
+          }
+
+          case OnStop =>
+            val _workCount = inbox.synchronized {
+              workerCount
+            }
+            assert(_workCount == 1, s"There should be only one worker but was ${_workCount}")
+            dispatcher.removeRpcEndpointRef(endpoint)
+            endpoint.onStop()
+            assert(isEmpty, "OnStop should be the last message")
+
+          case Associated(remoteAddress) =>
+            endpoint.onConnected(remoteAddress)
+
+          case Disassociated(remoteAddress) =>
+            endpoint.onDisconnected(remoteAddress)
+
+          case AssociationError(cause, remoteAddress) =>
+            endpoint.onNetworkError(cause, remoteAddress)
+        }
+      }
+
+      inbox.synchronized {
+        // "enableConcurrent" will be set to false after `onStop` is called, so we should check it
+        // every time.
+        if (!enableConcurrent && workerCount != 1) {
+          // If we are not the only one worker, exit
+          workerCount -= 1
+          return
+        }
+        message = messages.poll()
+        if (message == null) {
+          workerCount -= 1
+          return
+        }
+      }
+    }
+  }
+
+  def post(message: InboxMessage): Unit = {
+    val dropped =
+      inbox.synchronized {
+        if (stopped) {
+          // We already put "OnStop" into "messages", so we should drop further messages
+          true
+        } else {
+          messages.add(message)
+          false
+        }
+      }
+    if (dropped) {
+      onDrop(message)
+    }
+  }
+
+  def stop(): Unit = inbox.synchronized {
+    // The following codes should be in `synchronized` so that we can make sure "OnStop" is the last
+    // message
+    if (!stopped) {
+      // We should disable concurrent here. Then when RpcEndpoint.onStop is called, it's the only
+      // thread that is processing messages. So `RpcEndpoint.onStop` can release its resources
+      // safely.
+      enableConcurrent = false
+      stopped = true
+      messages.add(OnStop)
+      // Note: The concurrent events in messages will be processed one by one.
+    }
+  }
+
+  // Visible for testing.
+  protected def onDrop(message: InboxMessage): Unit = {
+    logWarning(s"Drop ${message} because $endpointRef is stopped")
+  }
+
+  def isEmpty: Boolean = inbox.synchronized { messages.isEmpty }
+
+  private def safelyCall(endpoint: RpcEndpoint)(action: => Unit): Unit = {
+    try {
+      action
+    } catch {
+      case NonFatal(e) => {
+        try {
+          endpoint.onError(e)
+        } catch {
+          case NonFatal(e) => logWarning(s"Ignore error", e)
+        }
+      }
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
new file mode 100644
index 000000000000..1876b2559208
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.net.URI
+
+import org.apache.spark.SparkException
+import org.apache.spark.rpc.RpcAddress
+
+private[netty] case class NettyRpcAddress(host: String, port: Int, name: String) {
+
+  def toRpcAddress: RpcAddress = RpcAddress(host, port)
+
+  override val toString = s"spark://$name@$host:$port"
+}
+
+private[netty] object NettyRpcAddress {
+
+  def apply(sparkUrl: String): NettyRpcAddress = {
+    try {
+      val uri = new URI(sparkUrl)
+      val host = uri.getHost
+      val port = uri.getPort
+      val name = uri.getUserInfo
+      if (uri.getScheme != "spark" ||
+        host == null ||
+        port < 0 ||
+        name == null ||
+        (uri.getPath != null && !uri.getPath.isEmpty) || // uri.getPath returns "" instead of null
+        uri.getFragment != null ||
+        uri.getQuery != null) {
+        throw new SparkException("Invalid Spark URL: " + sparkUrl)
+      }
+      NettyRpcAddress(host, port, name)
+    } catch {
+      case e: java.net.URISyntaxException =>
+        throw new SparkException("Invalid Spark URL: " + sparkUrl, e)
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
new file mode 100644
index 000000000000..75dcc02a0c5a
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import scala.concurrent.Promise
+
+import org.apache.spark.Logging
+import org.apache.spark.network.client.RpcResponseCallback
+import org.apache.spark.rpc.{RpcAddress, RpcCallContext}
+
+private[netty] abstract class NettyRpcCallContext(
+    endpointRef: NettyRpcEndpointRef,
+    override val senderAddress: RpcAddress,
+    needReply: Boolean) extends RpcCallContext with Logging {
+
+  protected def send(message: Any): Unit
+
+  override def reply(response: Any): Unit = {
+    if (needReply) {
+      send(AskResponse(endpointRef, response))
+    } else {
+      throw new IllegalStateException(
+        s"Cannot send $response to the sender because the sender won't handle it")
+    }
+  }
+
+  override def sendFailure(e: Throwable): Unit = {
+    if (needReply) {
+      send(AskResponse(endpointRef, RpcFailure(e)))
+    } else {
+      logError(e.getMessage, e)
+      throw new IllegalStateException(
+        "Cannot send reply to the sender because the sender won't handle it")
+    }
+  }
+
+  def finish(): Unit = {
+    if (!needReply) {
+      send(Ack(endpointRef))
+    }
+  }
+}
+
+/**
+ * If the sender and the receiver are in the same process, the reply can be sent back via `Promise`.
+ */
+private[netty] class LocalNettyRpcCallContext(
+    endpointRef: NettyRpcEndpointRef,
+    senderAddress: RpcAddress,
+    needReply: Boolean,
+    p: Promise[Any]) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+
+  override protected def send(message: Any): Unit = {
+    p.success(message)
+  }
+}
+
+/**
+ * A [[RpcCallContext]] that will call [[RpcResponseCallback]] to send the reply back.
+ */
+private[netty] class RemoteNettyRpcCallContext(
+    nettyEnv: NettyRpcEnv,
+    endpointRef: NettyRpcEndpointRef,
+    callback: RpcResponseCallback,
+    senderAddress: RpcAddress,
+    needReply: Boolean) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+
+  override protected def send(message: Any): Unit = {
+    val reply = nettyEnv.serialize(message)
+    callback.onSuccess(reply)
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
new file mode 100644
index 000000000000..5522b40782d9
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -0,0 +1,504 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc.netty
+
+import java.io._
+import java.net.{InetSocketAddress, URI}
+import java.nio.ByteBuffer
+import java.util.Arrays
+import java.util.concurrent._
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+import scala.concurrent.{Future, Promise}
+import scala.reflect.ClassTag
+import scala.util.{DynamicVariable, Failure, Success}
+import scala.util.control.NonFatal
+
+import org.apache.spark.{Logging, SecurityManager, SparkConf}
+import org.apache.spark.network.TransportContext
+import org.apache.spark.network.client._
+import org.apache.spark.network.netty.SparkTransportConf
+import org.apache.spark.network.sasl.{SaslClientBootstrap, SaslServerBootstrap}
+import org.apache.spark.network.server._
+import org.apache.spark.rpc._
+import org.apache.spark.serializer.{JavaSerializer, JavaSerializerInstance}
+import org.apache.spark.util.{ThreadUtils, Utils}
+
+private[netty] class NettyRpcEnv(
+    val conf: SparkConf,
+    javaSerializerInstance: JavaSerializerInstance,
+    host: String,
+    securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
+
+  private val transportConf =
+    SparkTransportConf.fromSparkConf(conf, conf.getInt("spark.rpc.io.threads", 0))
+
+  private val dispatcher: Dispatcher = new Dispatcher(this)
+
+  private val transportContext =
+    new TransportContext(transportConf, new NettyRpcHandler(dispatcher, this))
+
+  private val clientFactory = {
+    val bootstraps: Seq[TransportClientBootstrap] =
+      if (securityManager.isAuthenticationEnabled()) {
+        Seq(new SaslClientBootstrap(transportConf, "", securityManager,
+          securityManager.isSaslEncryptionEnabled()))
+      } else {
+        Nil
+      }
+    transportContext.createClientFactory(bootstraps.asJava)
+  }
+
+  val timeoutScheduler = ThreadUtils.newDaemonSingleThreadScheduledExecutor("netty-rpc-env-timeout")
+
+  // Because TransportClientFactory.createClient is blocking, we need to run it in this thread pool
+  // to implement non-blocking send/ask.
+  // TODO: a non-blocking TransportClientFactory.createClient in future
+  private val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
+    "netty-rpc-connection",
+    conf.getInt("spark.rpc.connect.threads", 256))
+
+  @volatile private var server: TransportServer = _
+
+  def start(port: Int): Unit = {
+    val bootstraps: Seq[TransportServerBootstrap] =
+      if (securityManager.isAuthenticationEnabled()) {
+        Seq(new SaslServerBootstrap(transportConf, securityManager))
+      } else {
+        Nil
+      }
+    server = transportContext.createServer(port, bootstraps.asJava)
+    dispatcher.registerRpcEndpoint(IDVerifier.NAME, new IDVerifier(this, dispatcher))
+  }
+
+  override lazy val address: RpcAddress = {
+    require(server != null, "NettyRpcEnv has not yet started")
+    RpcAddress(host, server.getPort())
+  }
+
+  override def setupEndpoint(name: String, endpoint: RpcEndpoint): RpcEndpointRef = {
+    dispatcher.registerRpcEndpoint(name, endpoint)
+  }
+
+  def asyncSetupEndpointRefByURI(uri: String): Future[RpcEndpointRef] = {
+    val addr = NettyRpcAddress(uri)
+    val endpointRef = new NettyRpcEndpointRef(conf, addr, this)
+    val idVerifierRef =
+      new NettyRpcEndpointRef(conf, NettyRpcAddress(addr.host, addr.port, IDVerifier.NAME), this)
+    idVerifierRef.ask[Boolean](ID(endpointRef.name)).flatMap { find =>
+      if (find) {
+        Future.successful(endpointRef)
+      } else {
+        Future.failed(new RpcEndpointNotFoundException(uri))
+      }
+    }(ThreadUtils.sameThread)
+  }
+
+  override def stop(endpointRef: RpcEndpointRef): Unit = {
+    require(endpointRef.isInstanceOf[NettyRpcEndpointRef])
+    dispatcher.stop(endpointRef)
+  }
+
+  private[netty] def send(message: RequestMessage): Unit = {
+    val remoteAddr = message.receiver.address
+    if (remoteAddr == address) {
+      val promise = Promise[Any]()
+      dispatcher.postMessage(message, promise)
+      promise.future.onComplete {
+        case Success(response) =>
+          val ack = response.asInstanceOf[Ack]
+          logDebug(s"Receive ack from ${ack.sender}")
+        case Failure(e) =>
+          logError(s"Exception when sending $message", e)
+      }(ThreadUtils.sameThread)
+    } else {
+      try {
+        // `createClient` will block if it cannot find a known connection, so we should run it in
+        // clientConnectionExecutor
+        clientConnectionExecutor.execute(new Runnable {
+          override def run(): Unit = Utils.tryLogNonFatalError {
+            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
+            client.sendRpc(serialize(message), new RpcResponseCallback {
+
+              override def onFailure(e: Throwable): Unit = {
+                logError(s"Exception when sending $message", e)
+              }
+
+              override def onSuccess(response: Array[Byte]): Unit = {
+                val ack = deserialize[Ack](response)
+                logDebug(s"Receive ack from ${ack.sender}")
+              }
+            })
+          }
+        })
+      } catch {
+        case e: RejectedExecutionException => {
+          // `send` after shutting clientConnectionExecutor down, ignore it
+          logWarning(s"Cannot send ${message} because RpcEnv is stopped")
+        }
+      }
+    }
+  }
+
+  private[netty] def ask(message: RequestMessage): Future[Any] = {
+    val promise = Promise[Any]()
+    val remoteAddr = message.receiver.address
+    if (remoteAddr == address) {
+      val p = Promise[Any]()
+      dispatcher.postMessage(message, p)
+      p.future.onComplete {
+        case Success(response) =>
+          val reply = response.asInstanceOf[AskResponse]
+          if (reply.reply.isInstanceOf[RpcFailure]) {
+            if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
+              logWarning(s"Ignore failure: ${reply.reply}")
+            }
+          } else if (!promise.trySuccess(reply.reply)) {
+            logWarning(s"Ignore message: ${reply}")
+          }
+        case Failure(e) =>
+          if (!promise.tryFailure(e)) {
+            logWarning("Ignore Exception", e)
+          }
+      }(ThreadUtils.sameThread)
+    } else {
+      try {
+        // `createClient` will block if it cannot find a known connection, so we should run it in
+        // clientConnectionExecutor
+        clientConnectionExecutor.execute(new Runnable {
+          override def run(): Unit = {
+            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
+            client.sendRpc(serialize(message), new RpcResponseCallback {
+
+              override def onFailure(e: Throwable): Unit = {
+                if (!promise.tryFailure(e)) {
+                  logWarning("Ignore Exception", e)
+                }
+              }
+
+              override def onSuccess(response: Array[Byte]): Unit = {
+                val reply = deserialize[AskResponse](response)
+                if (reply.reply.isInstanceOf[RpcFailure]) {
+                  if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
+                    logWarning(s"Ignore failure: ${reply.reply}")
+                  }
+                } else if (!promise.trySuccess(reply.reply)) {
+                  logWarning(s"Ignore message: ${reply}")
+                }
+              }
+            })
+          }
+        })
+      } catch {
+        case e: RejectedExecutionException => {
+          if (!promise.tryFailure(e)) {
+            logWarning(s"Ignore failure", e)
+          }
+        }
+      }
+    }
+    promise.future
+  }
+
+  private[netty] def serialize(content: Any): Array[Byte] = {
+    val buffer = javaSerializerInstance.serialize(content)
+    Arrays.copyOfRange(
+      buffer.array(), buffer.arrayOffset + buffer.position, buffer.arrayOffset + buffer.limit)
+  }
+
+  private[netty] def deserialize[T: ClassTag](bytes: Array[Byte]): T = {
+    deserialize { () =>
+      javaSerializerInstance.deserialize[T](ByteBuffer.wrap(bytes))
+    }
+  }
+
+  override def endpointRef(endpoint: RpcEndpoint): RpcEndpointRef = {
+    dispatcher.getRpcEndpointRef(endpoint)
+  }
+
+  override def uriOf(systemName: String, address: RpcAddress, endpointName: String): String =
+    new NettyRpcAddress(address.host, address.port, endpointName).toString
+
+  override def shutdown(): Unit = {
+    cleanup()
+  }
+
+  override def awaitTermination(): Unit = {
+    dispatcher.awaitTermination()
+  }
+
+  private def cleanup(): Unit = {
+    if (timeoutScheduler != null) {
+      timeoutScheduler.shutdownNow()
+    }
+    if (server != null) {
+      server.close()
+    }
+    if (clientFactory != null) {
+      clientFactory.close()
+    }
+    if (dispatcher != null) {
+      dispatcher.stop()
+    }
+    if (clientConnectionExecutor != null) {
+      clientConnectionExecutor.shutdownNow()
+    }
+  }
+
+  override def deserialize[T](deserializationAction: () => T): T = {
+    NettyRpcEnv.currentEnv.withValue(this) {
+      deserializationAction()
+    }
+  }
+}
+
+private[netty] object NettyRpcEnv extends Logging {
+
+  /**
+   * When deserializing the [[NettyRpcEndpointRef]], it needs a reference to [[NettyRpcEnv]].
+   * Use `currentEnv` to wrap the deserialization codes. E.g.,
+   *
+   * {{{
+   *   NettyRpcEnv.currentEnv.withValue(this) {
+   *     your deserialization codes
+   *   }
+   * }}}
+   */
+  private[netty] val currentEnv = new DynamicVariable[NettyRpcEnv](null)
+}
+
+private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
+
+  def create(config: RpcEnvConfig): RpcEnv = {
+    val sparkConf = config.conf
+    // Use JavaSerializerInstance in multiple threads is safe. However, if we plan to support
+    // KryoSerializer in future, we have to use ThreadLocal to store SerializerInstance
+    val javaSerializerInstance =
+      new JavaSerializer(sparkConf).newInstance().asInstanceOf[JavaSerializerInstance]
+    val nettyEnv =
+      new NettyRpcEnv(sparkConf, javaSerializerInstance, config.host, config.securityManager)
+    val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
+      nettyEnv.start(actualPort)
+      (nettyEnv, actualPort)
+    }
+    try {
+      Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
+    } catch {
+      case NonFatal(e) =>
+        nettyEnv.shutdown()
+        throw e
+    }
+  }
+}
+
+private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
+  extends RpcEndpointRef(conf) with Serializable with Logging {
+
+  @transient @volatile private var nettyEnv: NettyRpcEnv = _
+
+  @transient @volatile private var _address: NettyRpcAddress = _
+
+  def this(conf: SparkConf, _address: NettyRpcAddress, nettyEnv: NettyRpcEnv) {
+    this(conf)
+    this._address = _address
+    this.nettyEnv = nettyEnv
+  }
+
+  override def address: RpcAddress = _address.toRpcAddress
+
+  private def readObject(in: ObjectInputStream): Unit = {
+    in.defaultReadObject()
+    _address = in.readObject().asInstanceOf[NettyRpcAddress]
+    nettyEnv = NettyRpcEnv.currentEnv.value
+  }
+
+  private def writeObject(out: ObjectOutputStream): Unit = {
+    out.defaultWriteObject()
+    out.writeObject(_address)
+  }
+
+  override def name: String = _address.name
+
+  override def ask[T: ClassTag](message: Any, timeout: RpcTimeout): Future[T] = {
+    val promise = Promise[Any]()
+    val timeoutCancelable = nettyEnv.timeoutScheduler.schedule(new Runnable {
+      override def run(): Unit = {
+        promise.tryFailure(new TimeoutException("Cannot receive any reply in " + timeout.duration))
+      }
+    }, timeout.duration.toNanos, TimeUnit.NANOSECONDS)
+    val f = nettyEnv.ask(RequestMessage(nettyEnv.address, this, message, true))
+    f.onComplete { v =>
+      timeoutCancelable.cancel(true)
+      if (!promise.tryComplete(v)) {
+        logWarning(s"Ignore message $v")
+      }
+    }(ThreadUtils.sameThread)
+    promise.future.mapTo[T].recover(timeout.addMessageIfTimeout)(ThreadUtils.sameThread)
+  }
+
+  override def send(message: Any): Unit = {
+    require(message != null, "Message is null")
+    nettyEnv.send(RequestMessage(nettyEnv.address, this, message, false))
+  }
+
+  override def toString: String = s"NettyRpcEndpointRef(${_address})"
+
+  def toURI: URI = new URI(s"spark://${_address}")
+
+  final override def equals(that: Any): Boolean = that match {
+    case other: NettyRpcEndpointRef => _address == other._address
+    case _ => false
+  }
+
+  final override def hashCode(): Int = if (_address == null) 0 else _address.hashCode()
+}
+
+/**
+ * The message that is sent from the sender to the receiver.
+ */
+private[netty] case class RequestMessage(
+    senderAddress: RpcAddress, receiver: NettyRpcEndpointRef, content: Any, needReply: Boolean)
+
+/**
+ * The base trait for all messages that are sent back from the receiver to the sender.
+ */
+private[netty] trait ResponseMessage
+
+/**
+ * The reply for `ask` from the receiver side.
+ */
+private[netty] case class AskResponse(sender: NettyRpcEndpointRef, reply: Any)
+  extends ResponseMessage
+
+/**
+ * A message to send back to the receiver side. It's necessary because [[TransportClient]] only
+ * clean the resources when it receives a reply.
+ */
+private[netty] case class Ack(sender: NettyRpcEndpointRef) extends ResponseMessage
+
+/**
+ * A response that indicates some failure happens in the receiver side.
+ */
+private[netty] case class RpcFailure(e: Throwable)
+
+/**
+ * Maintain the mapping relations between client addresses and [[RpcEnv]] addresses, broadcast
+ * network events and forward messages to [[Dispatcher]].
+ */
+private[netty] class NettyRpcHandler(
+    dispatcher: Dispatcher, nettyEnv: NettyRpcEnv) extends RpcHandler with Logging {
+
+  private type ClientAddress = RpcAddress
+  private type RemoteEnvAddress = RpcAddress
+
+  // Store all client addresses and their NettyRpcEnv addresses.
+  @GuardedBy("this")
+  private val remoteAddresses = new mutable.HashMap[ClientAddress, RemoteEnvAddress]()
+
+  // Store the connections from other NettyRpcEnv addresses. We need to keep track of the connection
+  // count because `TransportClientFactory.createClient` will create multiple connections
+  // (at most `spark.shuffle.io.numConnectionsPerPeer` connections) and randomly select a connection
+  // to send the message. See `TransportClientFactory.createClient` for more details.
+  @GuardedBy("this")
+  private val remoteConnectionCount = new mutable.HashMap[RemoteEnvAddress, Int]()
+
+  override def receive(
+      client: TransportClient, message: Array[Byte], callback: RpcResponseCallback): Unit = {
+    val requestMessage = nettyEnv.deserialize[RequestMessage](message)
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    assert(addr != null)
+    val remoteEnvAddress = requestMessage.senderAddress
+    val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+    val broadcastMessage =
+      synchronized {
+        // If the first connection to a remote RpcEnv is found, we should broadcast "Associated"
+        if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
+          // clientAddr connects at the first time
+          val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
+          // Increase the connection number of remoteEnvAddress
+          remoteConnectionCount.put(remoteEnvAddress, count + 1)
+          if (count == 0) {
+            // This is the first connection, so fire "Associated"
+            Some(Associated(remoteEnvAddress))
+          } else {
+            None
+          }
+        } else {
+          None
+        }
+      }
+    broadcastMessage.foreach(dispatcher.broadcastMessage)
+    dispatcher.postMessage(requestMessage, callback)
+  }
+
+  override def getStreamManager: StreamManager = new OneForOneStreamManager
+
+  override def exceptionCaught(cause: Throwable, client: TransportClient): Unit = {
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    if (addr != null) {
+      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      val broadcastMessage =
+        synchronized {
+          remoteAddresses.get(clientAddr).map(AssociationError(cause, _))
+        }
+      if (broadcastMessage.isEmpty) {
+        logError(cause.getMessage, cause)
+      } else {
+        dispatcher.broadcastMessage(broadcastMessage.get)
+      }
+    } else {
+      // If the channel is closed before connecting, its remoteAddress will be null.
+      // See java.net.Socket.getRemoteSocketAddress
+      // Because we cannot get a RpcAddress, just log it
+      logError("Exception before connecting to the client", cause)
+    }
+  }
+
+  override def connectionTerminated(client: TransportClient): Unit = {
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    if (addr != null) {
+      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      val broadcastMessage =
+        synchronized {
+          // If the last connection to a remote RpcEnv is terminated, we should broadcast
+          // "Disassociated"
+          remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
+            remoteAddresses -= clientAddr
+            val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
+            assert(count != 0, "remoteAddresses and remoteConnectionCount are not consistent")
+            if (count - 1 == 0) {
+              // We lost all clients, so clean up and fire "Disassociated"
+              remoteConnectionCount.remove(remoteEnvAddress)
+              Some(Disassociated(remoteEnvAddress))
+            } else {
+              // Decrease the connection number of remoteEnvAddress
+              remoteConnectionCount.put(remoteEnvAddress, count - 1)
+              None
+            }
+          }
+        }
+      broadcastMessage.foreach(dispatcher.broadcastMessage)
+    } else {
+      // If the channel is closed before connecting, its remoteAddress will be null. In this case,
+      // we can ignore it since we don't fire "Associated".
+      // See java.net.Socket.getRemoteSocketAddress
+    }
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
index 7478ab0fc2f7..e749631bf6f1 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManagerSlaveEndpoint.scala
@@ -19,7 +19,7 @@ package org.apache.spark.storage
 
 import scala.concurrent.{ExecutionContext, Future}
 
-import org.apache.spark.rpc.{RpcEnv, RpcCallContext, RpcEndpoint}
+import org.apache.spark.rpc.{ThreadSafeRpcEndpoint, RpcEnv, RpcCallContext, RpcEndpoint}
 import org.apache.spark.util.ThreadUtils
 import org.apache.spark.{Logging, MapOutputTracker, SparkEnv}
 import org.apache.spark.storage.BlockManagerMessages._
@@ -33,7 +33,7 @@ class BlockManagerSlaveEndpoint(
     override val rpcEnv: RpcEnv,
     blockManager: BlockManager,
     mapOutputTracker: MapOutputTracker)
-  extends RpcEndpoint with Logging {
+  extends ThreadSafeRpcEndpoint with Logging {
 
   private val asyncThreadPool =
     ThreadUtils.newDaemonCachedThreadPool("block-manager-slave-async-thread-pool")
@@ -80,7 +80,7 @@ class BlockManagerSlaveEndpoint(
     future.onSuccess { case response =>
       logDebug("Done " + actionMessage + ", response is " + response)
       context.reply(response)
-      logDebug("Sent response: " + response + " to " + context.sender)
+      logDebug("Sent response: " + response + " to " + context.senderAddress)
     }
     future.onFailure { case t: Throwable =>
       logError("Error in " + actionMessage, t)
diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index 22e291a2b48d..1ed098379e29 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -85,7 +85,11 @@ private[spark] object ThreadUtils {
    */
   def newDaemonSingleThreadScheduledExecutor(threadName: String): ScheduledExecutorService = {
     val threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat(threadName).build()
-    Executors.newSingleThreadScheduledExecutor(threadFactory)
+    val executor = new ScheduledThreadPoolExecutor(1, threadFactory)
+    // By default, a cancelled task is not automatically removed from the work queue until its delay
+    // elapses. We have to enable it manually.
+    executor.setRemoveOnCancelPolicy(true)
+    executor
   }
 
   /**
diff --git a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
index af4e68950f75..7e70308bb360 100644
--- a/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/MapOutputTrackerSuite.scala
@@ -168,10 +168,9 @@ class MapOutputTrackerSuite extends SparkFunSuite {
     masterTracker.registerShuffle(10, 1)
     masterTracker.registerMapOutput(10, 0, MapStatus(
       BlockManagerId("88", "mph", 1000), Array.fill[Long](10)(0)))
-    val sender = mock(classOf[RpcEndpointRef])
-    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
+    val senderAddress = RpcAddress("localhost", 12345)
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.sender).thenReturn(sender)
+    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(10))
     verify(rpcCallContext).reply(any())
     verify(rpcCallContext, never()).sendFailure(any())
@@ -198,10 +197,9 @@ class MapOutputTrackerSuite extends SparkFunSuite {
       masterTracker.registerMapOutput(20, i, new CompressedMapStatus(
         BlockManagerId("999", "mps", 1000), Array.fill[Long](4000000)(0)))
     }
-    val sender = mock(classOf[RpcEndpointRef])
-    when(sender.address).thenReturn(RpcAddress("localhost", 12345))
+    val senderAddress = RpcAddress("localhost", 12345)
     val rpcCallContext = mock(classOf[RpcCallContext])
-    when(rpcCallContext.sender).thenReturn(sender)
+    when(rpcCallContext.senderAddress).thenReturn(senderAddress)
     masterEndpoint.receiveAndReply(rpcCallContext)(GetMapOutputStatuses(20))
     verify(rpcCallContext, never()).reply(any())
     verify(rpcCallContext).sendFailure(isA(classOf[SparkException]))
diff --git a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
index 33270bec6247..2d14249855c9 100644
--- a/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
+++ b/core/src/test/scala/org/apache/spark/SSLSampleConfigs.scala
@@ -41,6 +41,7 @@ object SSLSampleConfigs {
 
   def sparkSSLConfig(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
+    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", keyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
@@ -54,6 +55,7 @@ object SSLSampleConfigs {
 
   def sparkSSLConfigUntrusted(): SparkConf = {
     val conf = new SparkConf(loadDefaults = false)
+    conf.set("spark.rpc", "akka")
     conf.set("spark.ssl.enabled", "true")
     conf.set("spark.ssl.keyStore", untrustedKeyStorePath)
     conf.set("spark.ssl.keyStorePassword", "password")
diff --git a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
index e9034e39a715..40c24bdecc6c 100644
--- a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerWatcherSuite.scala
@@ -26,8 +26,7 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val conf = new SparkConf()
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
-    workerWatcher.setTesting(testing = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(RpcAddress("1.2.3.4", 1234))
     assert(workerWatcher.isShutDown)
@@ -39,8 +38,7 @@ class WorkerWatcherSuite extends SparkFunSuite {
     val rpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     val targetWorkerUrl = rpcEnv.uriOf("test", RpcAddress("1.2.3.4", 1234), "Worker")
     val otherRpcAddress = RpcAddress("4.3.2.1", 1234)
-    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl)
-    workerWatcher.setTesting(testing = true)
+    val workerWatcher = new WorkerWatcher(rpcEnv, targetWorkerUrl, isTesting = true)
     rpcEnv.setupEndpoint("worker-watcher", workerWatcher)
     workerWatcher.onDisconnected(otherRpcAddress)
     assert(!workerWatcher.isShutDown)
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 6ceafe433774..3bead6395d38 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.rpc
 
+import java.io.NotSerializableException
 import java.util.concurrent.{TimeUnit, CountDownLatch, TimeoutException}
 
 import scala.collection.mutable
@@ -99,7 +100,6 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     }
     val rpcEndpointRef = env.setupEndpoint("send-ref", endpoint)
-
     val newRpcEndpointRef = rpcEndpointRef.askWithRetry[RpcEndpointRef]("Hello")
     val reply = newRpcEndpointRef.askWithRetry[String]("Echo")
     assert("Echo" === reply)
@@ -328,9 +328,6 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       override def onStop(): Unit = {
         selfOption = Option(self)
       }
-
-      override def onError(cause: Throwable): Unit = {
-      }
     })
 
     env.stop(endpointRef)
@@ -516,6 +513,9 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       assert(events === List(
         ("onConnected", remoteAddress),
         ("onNetworkError", remoteAddress),
+        ("onDisconnected", remoteAddress)) ||
+        events === List(
+        ("onConnected", remoteAddress),
         ("onDisconnected", remoteAddress)))
     }
   }
@@ -535,15 +535,84 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       "local", env.address, "sendWithReply-unserializable-error")
     try {
       val f = rpcEndpointRef.ask[String]("hello")
-      intercept[TimeoutException] {
+      val e = intercept[Exception] {
         Await.result(f, 1 seconds)
       }
+      assert(e.isInstanceOf[TimeoutException] || // For Akka
+        e.isInstanceOf[NotSerializableException] // For Netty
+      )
     } finally {
       anotherEnv.shutdown()
       anotherEnv.awaitTermination()
     }
   }
 
+  test("port conflict") {
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", env.address.port)
+    assert(anotherEnv.address.port != env.address.port)
+  }
+
+  test("send with authentication") {
+    val conf = new SparkConf
+    conf.set("spark.authenticate", "true")
+    conf.set("spark.authenticate.secret", "good")
+
+    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+
+    try {
+      @volatile var message: String = null
+      localEnv.setupEndpoint("send-authentication", new RpcEndpoint {
+        override val rpcEnv = localEnv
+
+        override def receive: PartialFunction[Any, Unit] = {
+          case msg: String => message = msg
+        }
+      })
+      val rpcEndpointRef =
+        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "send-authentication")
+      rpcEndpointRef.send("hello")
+      eventually(timeout(5 seconds), interval(10 millis)) {
+        assert("hello" === message)
+      }
+    } finally {
+      localEnv.shutdown()
+      localEnv.awaitTermination()
+      remoteEnv.shutdown()
+      remoteEnv.awaitTermination()
+    }
+  }
+
+  test("ask with authentication") {
+    val conf = new SparkConf
+    conf.set("spark.authenticate", "true")
+    conf.set("spark.authenticate.secret", "good")
+
+    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+
+    try {
+      localEnv.setupEndpoint("ask-authentication", new RpcEndpoint {
+        override val rpcEnv = localEnv
+
+        override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+          case msg: String => {
+            context.reply(msg)
+          }
+        }
+      })
+      val rpcEndpointRef =
+        remoteEnv.setupEndpointRef("authentication-local", localEnv.address, "ask-authentication")
+      val reply = rpcEndpointRef.askWithRetry[String]("hello")
+      assert("hello" === reply)
+    } finally {
+      localEnv.shutdown()
+      localEnv.awaitTermination()
+      remoteEnv.shutdown()
+      remoteEnv.awaitTermination()
+    }
+  }
+
   test("construct RpcTimeout with conf property") {
     val conf = new SparkConf
 
@@ -612,7 +681,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     // once the future is complete to verify addMessageIfTimeout was invoked
     val reply3 =
       intercept[RpcTimeoutException] {
-        Await.result(fut3, 200 millis)
+        Await.result(fut3, 2000 millis)
       }.getMessage
 
     // When the future timed out, the recover callback should have used
diff --git a/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala b/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
new file mode 100644
index 000000000000..5e8da3e205ab
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/TestRpcEndpoint.scala
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.scalactic.TripleEquals
+
+class TestRpcEndpoint extends ThreadSafeRpcEndpoint with TripleEquals {
+
+  override val rpcEnv: RpcEnv = null
+
+  @volatile private var receiveMessages = ArrayBuffer[Any]()
+
+  @volatile private var receiveAndReplyMessages = ArrayBuffer[Any]()
+
+  @volatile private var onConnectedMessages = ArrayBuffer[RpcAddress]()
+
+  @volatile private var onDisconnectedMessages = ArrayBuffer[RpcAddress]()
+
+  @volatile private var onNetworkErrorMessages = ArrayBuffer[(Throwable, RpcAddress)]()
+
+  @volatile private var started = false
+
+  @volatile private var stopped = false
+
+  override def receive: PartialFunction[Any, Unit] = {
+    case message: Any => receiveMessages += message
+  }
+
+  override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+    case message: Any => receiveAndReplyMessages += message
+  }
+
+  override def onConnected(remoteAddress: RpcAddress): Unit = {
+    onConnectedMessages += remoteAddress
+  }
+
+  /**
+   * Invoked when some network error happens in the connection between the current node and
+   * `remoteAddress`.
+   */
+  override def onNetworkError(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+    onNetworkErrorMessages += cause -> remoteAddress
+  }
+
+  override def onDisconnected(remoteAddress: RpcAddress): Unit = {
+    onDisconnectedMessages += remoteAddress
+  }
+
+  def numReceiveMessages: Int = receiveMessages.size
+
+  override def onStart(): Unit = {
+    started = true
+  }
+
+  override def onStop(): Unit = {
+    stopped = true
+  }
+
+  def verifyStarted(): Unit = {
+    assert(started, "RpcEndpoint is not started")
+  }
+
+  def verifyStopped(): Unit = {
+    assert(stopped, "RpcEndpoint is not stopped")
+  }
+
+  def verifyReceiveMessages(expected: Seq[Any]): Unit = {
+    assert(receiveMessages === expected)
+  }
+
+  def verifySingleReceiveMessage(message: Any): Unit = {
+    verifyReceiveMessages(List(message))
+  }
+
+  def verifyReceiveAndReplyMessages(expected: Seq[Any]): Unit = {
+    assert(receiveAndReplyMessages === expected)
+  }
+
+  def verifySingleReceiveAndReplyMessage(message: Any): Unit = {
+    verifyReceiveAndReplyMessages(List(message))
+  }
+
+  def verifySingleOnConnectedMessage(remoteAddress: RpcAddress): Unit = {
+    verifyOnConnectedMessages(List(remoteAddress))
+  }
+
+  def verifyOnConnectedMessages(expected: Seq[RpcAddress]): Unit = {
+    assert(onConnectedMessages === expected)
+  }
+
+  def verifySingleOnDisconnectedMessage(remoteAddress: RpcAddress): Unit = {
+    verifyOnDisconnectedMessages(List(remoteAddress))
+  }
+
+  def verifyOnDisconnectedMessages(expected: Seq[RpcAddress]): Unit = {
+    assert(onDisconnectedMessages === expected)
+  }
+
+  def verifySingleOnNetworkErrorMessage(cause: Throwable, remoteAddress: RpcAddress): Unit = {
+    verifyOnNetworkErrorMessages(List(cause -> remoteAddress))
+  }
+
+  def verifyOnNetworkErrorMessages(expected: Seq[(Throwable, RpcAddress)]): Unit = {
+    assert(onNetworkErrorMessages === expected)
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
new file mode 100644
index 000000000000..120cf1b6fa9d
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
@@ -0,0 +1,150 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.concurrent.{CountDownLatch, TimeUnit}
+import java.util.concurrent.atomic.AtomicInteger
+
+import org.mockito.Mockito._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.rpc.{RpcEnv, RpcEndpoint, RpcAddress, TestRpcEndpoint}
+
+class InboxSuite extends SparkFunSuite {
+
+  test("post") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    when(endpointRef.name).thenReturn("hello")
+
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    val message = ContentMessage(null, "hi", false, null)
+    inbox.post(message)
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    endpoint.verifySingleReceiveMessage("hi")
+
+    inbox.stop()
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+    endpoint.verifyStarted()
+    endpoint.verifyStopped()
+  }
+
+  test("post: with reply") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    val message = ContentMessage(null, "hi", true, null)
+    inbox.post(message)
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    endpoint.verifySingleReceiveAndReplyMessage("hi")
+  }
+
+  test("post: multiple threads") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    when(endpointRef.name).thenReturn("hello")
+
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val numDroppedMessages = new AtomicInteger(0)
+    val inbox = new Inbox(endpointRef, endpoint) {
+      override def onDrop(message: InboxMessage): Unit = {
+        numDroppedMessages.incrementAndGet()
+      }
+    }
+
+    val exitLatch = new CountDownLatch(10)
+
+    for (_ <- 0 until 10) {
+      new Thread {
+        override def run(): Unit = {
+          for (_ <- 0 until 100) {
+            val message = ContentMessage(null, "hi", false, null)
+            inbox.post(message)
+          }
+          exitLatch.countDown()
+        }
+      }.start()
+    }
+    // Try to process some messages
+    inbox.process(dispatcher)
+    inbox.stop()
+    // After `stop` is called, further messages will be dropped. However, while `stop` is called,
+    // some messages may be post to Inbox, so process them here.
+    inbox.process(dispatcher)
+    assert(inbox.isEmpty)
+
+    exitLatch.await(30, TimeUnit.SECONDS)
+
+    assert(1000 === endpoint.numReceiveMessages + numDroppedMessages.get)
+    endpoint.verifyStarted()
+    endpoint.verifyStopped()
+  }
+
+  test("post: Associated") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(Associated(remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnConnectedMessage(remoteAddress)
+  }
+
+  test("post: Disassociated") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(Disassociated(remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnDisconnectedMessage(remoteAddress)
+  }
+
+  test("post: AssociationError") {
+    val endpoint = new TestRpcEndpoint
+    val endpointRef = mock(classOf[NettyRpcEndpointRef])
+    val dispatcher = mock(classOf[Dispatcher])
+
+    val remoteAddress = RpcAddress("localhost", 11111)
+    val cause = new RuntimeException("Oops")
+
+    val inbox = new Inbox(endpointRef, endpoint)
+    inbox.post(AssociationError(cause, remoteAddress))
+    inbox.process(dispatcher)
+
+    endpoint.verifySingleOnNetworkErrorMessage(cause, remoteAddress)
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
new file mode 100644
index 000000000000..a5d43d3704e3
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.SparkFunSuite
+
+class NettyRpcAddressSuite extends SparkFunSuite {
+
+  test("toString") {
+    val addr = NettyRpcAddress("localhost", 12345, "test")
+    assert(addr.toString === "spark://test@localhost:12345")
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
new file mode 100644
index 000000000000..be19668e17c0
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
@@ -0,0 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import org.apache.spark.{SecurityManager, SparkConf}
+import org.apache.spark.rpc._
+
+class NettyRpcEnvSuite extends RpcEnvSuite {
+
+  override def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv = {
+    val config = RpcEnvConfig(conf, "test", "localhost", port, new SecurityManager(conf))
+    new NettyRpcEnvFactory().create(config)
+  }
+
+  test("non-existent endpoint") {
+    val uri = env.uriOf("test", env.address, "nonexist-endpoint")
+    val e = intercept[RpcEndpointNotFoundException] {
+      env.setupEndpointRef("test", env.address, "nonexist-endpoint")
+    }
+    assert(e.getMessage.contains(uri))
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
new file mode 100644
index 000000000000..06ca035d199e
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.net.InetSocketAddress
+
+import io.netty.channel.Channel
+import org.mockito.Mockito._
+import org.mockito.Matchers._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.network.client.{TransportResponseHandler, TransportClient}
+import org.apache.spark.rpc._
+
+class NettyRpcHandlerSuite extends SparkFunSuite {
+
+  val env = mock(classOf[NettyRpcEnv])
+  when(env.deserialize(any(classOf[Array[Byte]]))(any())).
+    thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
+
+  test("receive") {
+    val dispatcher = mock(classOf[Dispatcher])
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+
+    val channel = mock(classOf[Channel])
+    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.receive(client, null, null)
+
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40001))
+    nettyRpcHandler.receive(client, null, null)
+
+    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
+  }
+
+  test("connectionTerminated") {
+    val dispatcher = mock(classOf[Dispatcher])
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+
+    val channel = mock(classOf[Channel])
+    val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.receive(client, null, null)
+
+    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
+    nettyRpcHandler.connectionTerminated(client)
+
+    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).broadcastMessage(Disassociated(RpcAddress("localhost", 12345)))
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
index df841288a02e..fbb8bb6b2f6c 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
@@ -78,6 +78,10 @@ public TransportClient(Channel channel, TransportResponseHandler handler) {
     this.handler = Preconditions.checkNotNull(handler);
   }
 
+  public Channel getChannel() {
+    return channel;
+  }
+
   public boolean isActive() {
     return channel.isOpen() || channel.isActive();
   }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
index 2ba92a40f8b0..dbb7f95f55bc 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/RpcHandler.java
@@ -52,4 +52,6 @@ public abstract void receive(
    * No further requests will come from this client.
    */
   public void connectionTerminated(TransportClient client) { }
+
+  public void exceptionCaught(Throwable cause, TransportClient client) { }
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
index df6027805838..96941d26be19 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
@@ -71,6 +71,7 @@ public TransportRequestHandler(
 
   @Override
   public void exceptionCaught(Throwable cause) {
+    rpcHandler.exceptionCaught(cause, reverseClient);
   }
 
   @Override
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index 204e6142fd6c..d053e9e84910 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -474,7 +474,7 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       // Remote messages
       case RegisterReceiver(streamId, typ, hostPort, receiverEndpoint) =>
         val successful =
-          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.sender.address)
+          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.senderAddress)
         context.reply(successful)
       case AddBlock(receivedBlockInfo) =>
         context.reply(addBlock(receivedBlockInfo))
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 07a0a45e60cb..0df31736c163 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -556,10 +556,7 @@ private[spark] class ApplicationMaster(
       override val rpcEnv: RpcEnv, driver: RpcEndpointRef, isClusterMode: Boolean)
     extends RpcEndpoint with Logging {
 
-    override def onStart(): Unit = {
-      driver.send(RegisterClusterManager(self))
-
-    }
+    driver.send(RegisterClusterManager(self))
 
     override def receive: PartialFunction[Any, Unit] = {
       case x: AddWebUIFilter =>

From be0dcd6eb120491bca62d65a11c476401f9932c1 Mon Sep 17 00:00:00 2001
From: Guillaume Poulin <guillaume@hopper.com>
Date: Sat, 3 Oct 2015 12:14:00 +0100
Subject: [PATCH 137/896] FIX: rememberDuration reassignment error message

I was reading throught the scheduler and found this small mistake.

Author: Guillaume Poulin <guillaume@hopper.com>

Closes #8966 from gpoulin/remember_duration_typo.
---
 .../apache/spark/streaming/DStreamGraph.scala    | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
index 40789c66f399..ebbcb6b77851 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
@@ -38,9 +38,7 @@ final private[streaming] class DStreamGraph extends Serializable with Logging {
 
   def start(time: Time) {
     this.synchronized {
-      if (zeroTime != null) {
-        throw new Exception("DStream graph computation already started")
-      }
+      require(zeroTime == null, "DStream graph computation already started")
       zeroTime = time
       startTime = time
       outputStreams.foreach(_.initialize(zeroTime))
@@ -68,20 +66,16 @@ final private[streaming] class DStreamGraph extends Serializable with Logging {
 
   def setBatchDuration(duration: Duration) {
     this.synchronized {
-      if (batchDuration != null) {
-        throw new Exception("Batch duration already set as " + batchDuration +
-          ". cannot set it again.")
-      }
+      require(batchDuration == null,
+        s"Batch duration already set as $batchDuration. Cannot set it again.")
       batchDuration = duration
     }
   }
 
   def remember(duration: Duration) {
     this.synchronized {
-      if (rememberDuration != null) {
-        throw new Exception("Remember duration already set as " + batchDuration +
-          ". cannot set it again.")
-      }
+      require(rememberDuration == null,
+        s"Remember duration already set as $rememberDuration. Cannot set it again.")
       rememberDuration = duration
     }
   }

From ae6570ec2bf937e28bd1e7bada7813ac56a7b79d Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 3 Oct 2015 18:08:25 -0700
Subject: [PATCH 138/896] Remove TODO in ShuffleMemoryManager.

---
 .../scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala    | 1 -
 1 file changed, 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
index a0d8abc2eecb..9839c7640cc6 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
@@ -177,7 +177,6 @@ private[spark] object ShuffleMemoryManager {
     val cores = if (numCores > 0) numCores else Runtime.getRuntime.availableProcessors()
     // Because of rounding to next power of 2, we may have safetyFactor as 8 in worst case
     val safetyFactor = 16
-    // TODO(davies): don't round to next power of 2
     val size = ByteArrayMethods.nextPowerOf2(maxMemory / cores / safetyFactor)
     val default = math.min(maxPageSize, math.max(minPageSize, size))
     conf.getSizeAsBytes("spark.buffer.pageSize", default)

From 721e8b5f35b230ff426c1757a9bdc1399fb19afa Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Sat, 3 Oct 2015 22:42:36 -0700
Subject: [PATCH 139/896] [SPARK-10904] [SPARKR] Fix to support `select(df,
 c("col1", "col2"))`

The fix is to coerce `c("a", "b")` into a list such that it could be serialized to call JVM with.

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #8961 from felixcheung/rselect.
---
 R/pkg/R/DataFrame.R              | 18 +++++++++++++-----
 R/pkg/inst/tests/test_sparkSQL.R |  9 ++++++++-
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 65e368c47dd8..14aea923fcfe 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1075,12 +1075,20 @@ setMethod("subset", signature(x = "DataFrame"),
 #'   select(df, c("col1", "col2"))
 #'   select(df, list(df$name, df$age + 1))
 #'   # Similar to R data frames columns can also be selected using `$`
-#'   df$age
+#'   df[,df$age]
 #' }
 setMethod("select", signature(x = "DataFrame", col = "character"),
           function(x, col, ...) {
-            sdf <- callJMethod(x@sdf, "select", col, list(...))
-            dataFrame(sdf)
+            if (length(col) > 1) {
+              if (length(list(...)) > 0) {
+                stop("To select multiple columns, use a character vector or list for col")
+              }
+
+              select(x, as.list(col))
+            } else {
+              sdf <- callJMethod(x@sdf, "select", col, list(...))
+              dataFrame(sdf)
+            }
           })
 
 #' @rdname select
@@ -1853,13 +1861,13 @@ setMethod("crosstab",
 #' This function downloads the contents of a DataFrame into an R's data.frame.
 #' Since data.frames are held in memory, ensure that you have enough memory
 #' in your system to accommodate the contents.
-#' 
+#'
 #' @title Download data from a DataFrame into a data.frame
 #' @param x a DataFrame
 #' @return a data.frame
 #' @rdname as.data.frame
 #' @examples \dontrun{
-#' 
+#'
 #' irisDF <- createDataFrame(sqlContext, iris)
 #' df <- as.data.frame(irisDF[irisDF$Species == "setosa", ])
 #' }
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 8f85eecbc4a9..faf42b7182c3 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -673,6 +673,13 @@ test_that("select with column", {
   expect_equal(columns(df3), c("x"))
   expect_equal(count(df3), 3)
   expect_equal(collect(select(df3, "x"))[[1, 1]], "x")
+
+  df4 <- select(df, c("name", "age"))
+  expect_equal(columns(df4), c("name", "age"))
+  expect_equal(count(df4), 3)
+
+  expect_error(select(df, c("name", "age"), "name"),
+                "To select multiple columns, use a character vector or list for col")
 })
 
 test_that("subsetting", {
@@ -1336,4 +1343,4 @@ test_that("Method as.data.frame as a synonym for collect()", {
 
 unlink(parquetPath)
 unlink(jsonPath)
-unlink(jsonPathNa)
\ No newline at end of file
+unlink(jsonPathNa)

From 82bbc2a5f2c74604db59060cb5e462a057398ddd Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Sun, 4 Oct 2015 09:31:52 +0100
Subject: [PATCH 140/896] [SPARK-9570] [DOCS] Consistent recommendation for
 submitting spark apps to YARN, -master yarn --deploy-mode x vs -master
 yarn-x'.

Recommend `--master yarn --deploy-mode {cluster,client}` consistently in docs.
Follow-on to https://github.com/apache/spark/pull/8385
CC nssalian

Author: Sean Owen <sowen@cloudera.com>

Closes #8968 from srowen/SPARK-9570.
---
 README.md                       |  2 +-
 docs/running-on-yarn.md         | 32 +++++++++++++++++---------------
 docs/sql-programming-guide.md   |  2 +-
 docs/submitting-applications.md | 25 +++++++++++++++----------
 4 files changed, 34 insertions(+), 27 deletions(-)

diff --git a/README.md b/README.md
index 76e29b423566..4116ef356387 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@ will run the Pi example locally.
 
 You can set the MASTER environment variable when running examples to submit
 examples to a cluster. This can be a mesos:// or spark:// URL,
-"yarn-cluster" or "yarn-client" to run on YARN, and "local" to run
+"yarn" to run on YARN, and "local" to run
 locally with one thread, or "local[N]" to run locally with N threads. You
 can also use an abbreviated class name if the class is in the `examples`
 package. For instance:
diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index 0e25ccf512c0..6d77db6a3271 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -16,18 +16,19 @@ containers used by the application use the same configuration. If the configurat
 Java system properties or environment variables not managed by YARN, they should also be set in the
 Spark application's configuration (driver, executors, and the AM when running in client mode).
 
-There are two deploy modes that can be used to launch Spark applications on YARN. In `yarn-cluster` mode, the Spark driver runs inside an application master process which is managed by YARN on the cluster, and the client can go away after initiating the application. In `yarn-client` mode, the driver runs in the client process, and the application master is only used for requesting resources from YARN.
+There are two deploy modes that can be used to launch Spark applications on YARN. In `cluster` mode, the Spark driver runs inside an application master process which is managed by YARN on the cluster, and the client can go away after initiating the application. In `client` mode, the driver runs in the client process, and the application master is only used for requesting resources from YARN.
 
-Unlike [Spark standalone](spark-standalone.html) and [Mesos](running-on-mesos.html) modes, in which the master's address is specified in the `--master` parameter, in YARN mode the ResourceManager's address is picked up from the Hadoop configuration. Thus, the `--master` parameter is `yarn-client` or `yarn-cluster`.
+Unlike [Spark standalone](spark-standalone.html) and [Mesos](running-on-mesos.html) modes, in which the master's address is specified in the `--master` parameter, in YARN mode the ResourceManager's address is picked up from the Hadoop configuration. Thus, the `--master` parameter is `yarn`.
 
-To launch a Spark application in `yarn-cluster` mode:
+To launch a Spark application in `cluster` mode:
 
-    $ ./bin/spark-submit --class path.to.your.Class --master yarn-cluster [options] <app jar> [app options]
+    $ ./bin/spark-submit --class path.to.your.Class --master yarn --deploy-mode cluster [options] <app jar> [app options]
 
 For example:
 
     $ ./bin/spark-submit --class org.apache.spark.examples.SparkPi \
-        --master yarn-cluster \
+        --master yarn \
+        --deploy-mode cluster \
         --driver-memory 4g \
         --executor-memory 2g \
         --executor-cores 1 \
@@ -37,16 +38,17 @@ For example:
 
 The above starts a YARN client program which starts the default Application Master. Then SparkPi will be run as a child thread of Application Master. The client will periodically poll the Application Master for status updates and display them in the console. The client will exit once your application has finished running.  Refer to the "Debugging your Application" section below for how to see driver and executor logs.
 
-To launch a Spark application in `yarn-client` mode, do the same, but replace `yarn-cluster` with `yarn-client`. The following shows how you can run `spark-shell` in `yarn-client` mode:
+To launch a Spark application in `client` mode, do the same, but replace `cluster` with `client`. The following shows how you can run `spark-shell` in `client` mode:
 
-    $ ./bin/spark-shell --master yarn-client
+    $ ./bin/spark-shell --master yarn --deploy-mode client
 
 ## Adding Other JARs
 
-In `yarn-cluster` mode, the driver runs on a different machine than the client, so `SparkContext.addJar` won't work out of the box with files that are local to the client. To make files on the client available to `SparkContext.addJar`, include them with the `--jars` option in the launch command.
+In `cluster` mode, the driver runs on a different machine than the client, so `SparkContext.addJar` won't work out of the box with files that are local to the client. To make files on the client available to `SparkContext.addJar`, include them with the `--jars` option in the launch command.
 
     $ ./bin/spark-submit --class my.main.Class \
-        --master yarn-cluster \
+        --master yarn \
+        --deploy-mode cluster \
         --jars my-other-jar.jar,my-other-other-jar.jar
         my-main-jar.jar
         app_arg1 app_arg2
@@ -129,8 +131,8 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td><code>spark.yarn.am.waitTime</code></td>
   <td><code>100s</code></td>
   <td>
-    In <code>yarn-cluster</code> mode, time for the YARN Application Master to wait for the
-    SparkContext to be initialized. In <code>yarn-client</code> mode, time for the YARN Application Master to wait
+    In <code>cluster</code> mode, time for the YARN Application Master to wait for the
+    SparkContext to be initialized. In <code>client</code> mode, time for the YARN Application Master to wait
     for the driver to connect to it.
   </td>
 </tr>
@@ -268,8 +270,8 @@ If you need a reference to the proper location to put log files in the YARN so t
   <td>
      Add the environment variable specified by <code>EnvironmentVariableName</code> to the
      Application Master process launched on YARN. The user can specify multiple of
-     these and to set multiple environment variables. In <code>yarn-cluster</code> mode this controls
-     the environment of the Spark driver and in <code>yarn-client</code> mode it only controls
+     these and to set multiple environment variables. In <code>cluster</code> mode this controls
+     the environment of the Spark driver and in <code>client</code> mode it only controls
      the environment of the executor launcher.
   </td>
 </tr>
@@ -388,6 +390,6 @@ If you need a reference to the proper location to put log files in the YARN so t
 # Important notes
 
 - Whether core requests are honored in scheduling decisions depends on which scheduler is in use and how it is configured.
-- In `yarn-cluster` mode, the local directories used by the Spark executors and the Spark driver will be the local directories configured for YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`, it will be ignored. In `yarn-client` mode, the Spark executors will use the local directories configured for YARN while the Spark driver will use those defined in `spark.local.dir`. This is because the Spark driver does not run on the YARN cluster in `yarn-client` mode, only the Spark executors do.
+- In `cluster` mode, the local directories used by the Spark executors and the Spark driver will be the local directories configured for YARN (Hadoop YARN config `yarn.nodemanager.local-dirs`). If the user specifies `spark.local.dir`, it will be ignored. In `client` mode, the Spark executors will use the local directories configured for YARN while the Spark driver will use those defined in `spark.local.dir`. This is because the Spark driver does not run on the YARN cluster in `client` mode, only the Spark executors do.
 - The `--files` and `--archives` options support specifying file names with the # similar to Hadoop. For example you can specify: `--files localtest.txt#appSees.txt` and this will upload the file you have locally named `localtest.txt` into HDFS but this will be linked to by the name `appSees.txt`, and your application should use the name as `appSees.txt` to reference it when running on YARN.
-- The `--jars` option allows the `SparkContext.addJar` function to work if you are using it with local files and running in `yarn-cluster` mode. It does not need to be used if you are using it with HDFS, HTTP, HTTPS, or FTP files.
+- The `--jars` option allows the `SparkContext.addJar` function to work if you are using it with local files and running in `cluster` mode. It does not need to be used if you are using it with HDFS, HTTP, HTTPS, or FTP files.
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index a1cbc7de97c6..30206c6f6fd9 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1585,7 +1585,7 @@ on all of the worker nodes, as they will need access to the Hive serialization a
 (SerDes) in order to access data stored in Hive.
 
 Configuration of Hive is done by placing your `hive-site.xml` file in `conf/`. Please note when running
-the query on a YARN cluster (`yarn-cluster` mode), the `datanucleus` jars under the `lib_managed/jars` directory
+the query on a YARN cluster (`cluster` mode), the `datanucleus` jars under the `lib_managed/jars` directory
 and `hive-site.xml` under `conf/` directory need to be available on the driver and all executors launched by the
 YARN cluster. The convenient way to do this is adding them through the `--jars` option and `--file` option of the
 `spark-submit` command.
diff --git a/docs/submitting-applications.md b/docs/submitting-applications.md
index 915be0f47915..ac2a14eb56fe 100644
--- a/docs/submitting-applications.md
+++ b/docs/submitting-applications.md
@@ -103,7 +103,8 @@ run it with `--help`. Here are a few examples of common options:
 export HADOOP_CONF_DIR=XXX
 ./bin/spark-submit \
   --class org.apache.spark.examples.SparkPi \
-  --master yarn-cluster \  # can also be yarn-client for client mode
+  --master yarn \
+  --deploy-mode cluster \  # can be client for client mode
   --executor-memory 20G \
   --num-executors 50 \
   /path/to/examples.jar \
@@ -122,21 +123,25 @@ The master URL passed to Spark can be in one of the following formats:
 
 <table class="table">
 <tr><th>Master URL</th><th>Meaning</th></tr>
-<tr><td> local </td><td> Run Spark locally with one worker thread (i.e. no parallelism at all). </td></tr>
-<tr><td> local[K] </td><td> Run Spark locally with K worker threads (ideally, set this to the number of cores on your machine). </td></tr>
-<tr><td> local[*] </td><td> Run Spark locally with as many worker threads as logical cores on your machine.</td></tr>
-<tr><td> spark://HOST:PORT </td><td> Connect to the given <a href="spark-standalone.html">Spark standalone
+<tr><td> <code>local</code> </td><td> Run Spark locally with one worker thread (i.e. no parallelism at all). </td></tr>
+<tr><td> <code>local[K]</code> </td><td> Run Spark locally with K worker threads (ideally, set this to the number of cores on your machine). </td></tr>
+<tr><td> <code>local[*]</code> </td><td> Run Spark locally with as many worker threads as logical cores on your machine.</td></tr>
+<tr><td> <code>spark://HOST:PORT</code> </td><td> Connect to the given <a href="spark-standalone.html">Spark standalone
         cluster</a> master. The port must be whichever one your master is configured to use, which is 7077 by default.
 </td></tr>
-<tr><td> mesos://HOST:PORT </td><td> Connect to the given <a href="running-on-mesos.html">Mesos</a> cluster.
+<tr><td> <code>mesos://HOST:PORT</code> </td><td> Connect to the given <a href="running-on-mesos.html">Mesos</a> cluster.
         The port must be whichever one your is configured to use, which is 5050 by default.
         Or, for a Mesos cluster using ZooKeeper, use <code>mesos://zk://...</code>.
 </td></tr>
-<tr><td> yarn-client </td><td> Connect to a <a href="running-on-yarn.html"> YARN </a> cluster in
-client mode. The cluster location will be found based on the HADOOP_CONF_DIR or YARN_CONF_DIR variable.
+<tr><td> <code>yarn</code> </td><td> Connect to a <a href="running-on-yarn.html"> YARN </a> cluster in
+        <code>client</code> or <code>cluster</code> mode depending on the value of <code>--deploy-mode</code>. 
+        The cluster location will be found based on the <code>HADOOP_CONF_DIR</code> or <code>YARN_CONF_DIR</code> variable.
 </td></tr>
-<tr><td> yarn-cluster </td><td> Connect to a <a href="running-on-yarn.html"> YARN </a> cluster in
-cluster mode. The cluster location will be found based on the HADOOP_CONF_DIR or YARN_CONF_DIR variable.
+<tr><td> <code>yarn-client</code> </td><td> Equivalent to <code>yarn</code> with <code>--deploy-mode client</code>,
+        which is preferred to `yarn-client`
+</td></tr>
+<tr><td> <code>yarn-cluster</code> </td><td> Equivalent to <code>yarn</code> with <code>--deploy-mode cluster</code>,
+        which is preferred to `yarn-cluster`
 </td></tr>
 </table>
 

From 883bd8fccf83aae7a2a847c9a6ca129fac86e6a3 Mon Sep 17 00:00:00 2001
From: Avrohom Katz <iambpentameter@gmail.com>
Date: Sun, 4 Oct 2015 09:36:07 +0100
Subject: [PATCH 141/896] [SPARK-10889] [STREAMING] Bump KCL to add
 MillisBehindLatest metric

I don't believe the API changed at all.

Author: Avrohom Katz <iambpentameter@gmail.com>

Closes #8957 from akatz/kcl-upgrade.
---
 pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pom.xml b/pom.xml
index 653599464114..d04ed1e79865 100644
--- a/pom.xml
+++ b/pom.xml
@@ -152,7 +152,7 @@
     <avro.mapred.classifier>hadoop2</avro.mapred.classifier>
     <jets3t.version>0.7.1</jets3t.version>
     <aws.java.sdk.version>1.9.16</aws.java.sdk.version>
-    <aws.kinesis.client.version>1.2.1</aws.kinesis.client.version>
+    <aws.kinesis.client.version>1.3.0</aws.kinesis.client.version>
     <!--  org.apache.httpcomponents/httpclient-->
     <commons.httpclient.version>4.3.2</commons.httpclient.version>
     <!--  commons-httpclient/commons-httpclient-->

From c4871369db96fc33c465d11b3bbd1ffeb3b94e89 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Mon, 5 Oct 2015 13:00:58 -0700
Subject: [PATCH 142/896] [SPARK-10585] [SQL] only copy data once when generate
 unsafe projection

This PR is a completely rewritten of GenerateUnsafeProjection, to accomplish the goal of copying data only once. The old code of GenerateUnsafeProjection is still there to reduce review difficulty.

Instead of creating unsafe conversion code for struct, array and map, we create code of writing the content to the global row buffer.

Author: Wenchen Fan <cloud0fan@163.com>
Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #8747 from cloud-fan/copy-once.
---
 .../catalyst/expressions/UnsafeArrayData.java |   7 +-
 .../catalyst/expressions/UnsafeMapData.java   |  15 +-
 .../catalyst/expressions/UnsafeReaders.java   |   6 +
 .../sql/catalyst/expressions/UnsafeRow.java   |   4 +-
 .../expressions/UnsafeRowWriters.java         |   4 +-
 .../catalyst/expressions/UnsafeWriters.java   |   4 +-
 .../expressions/codegen/BufferHolder.java     |  54 ++++
 .../codegen/UnsafeArrayWriter.java            | 151 +++++++++
 .../expressions/codegen/UnsafeRowWriter.java  | 199 ++++++++++++
 .../expressions/codegen/CodeGenerator.scala   |   1 +
 .../codegen/GenerateUnsafeProjection.scala    | 284 +++++++++++++++-
 .../expressions/UnsafeRowConverterSuite.scala | 305 ++++++++++++++----
 12 files changed, 950 insertions(+), 84 deletions(-)
 create mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
 create mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
 create mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index 501dff090313..da9538b3f13c 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -20,7 +20,6 @@
 import java.math.BigDecimal;
 import java.math.BigInteger;
 
-import org.apache.spark.sql.catalyst.InternalRow;
 import org.apache.spark.sql.types.*;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
@@ -256,7 +255,7 @@ public CalendarInterval getInterval(int ordinal) {
   }
 
   @Override
-  public InternalRow getStruct(int ordinal, int numFields) {
+  public UnsafeRow getStruct(int ordinal, int numFields) {
     assertIndexIsValid(ordinal);
     final int offset = getElementOffset(ordinal);
     if (offset < 0) return null;
@@ -267,7 +266,7 @@ public InternalRow getStruct(int ordinal, int numFields) {
   }
 
   @Override
-  public ArrayData getArray(int ordinal) {
+  public UnsafeArrayData getArray(int ordinal) {
     assertIndexIsValid(ordinal);
     final int offset = getElementOffset(ordinal);
     if (offset < 0) return null;
@@ -276,7 +275,7 @@ public ArrayData getArray(int ordinal) {
   }
 
   @Override
-  public MapData getMap(int ordinal) {
+  public UnsafeMapData getMap(int ordinal) {
     assertIndexIsValid(ordinal);
     final int offset = getElementOffset(ordinal);
     if (offset < 0) return null;
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
index 46216054ab38..e9dab9edb6bd 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
@@ -17,18 +17,23 @@
 
 package org.apache.spark.sql.catalyst.expressions;
 
-import org.apache.spark.sql.types.ArrayData;
 import org.apache.spark.sql.types.MapData;
 
 /**
  * An Unsafe implementation of Map which is backed by raw memory instead of Java objects.
  *
  * Currently we just use 2 UnsafeArrayData to represent UnsafeMapData.
+ *
+ * Note that when we write out this map, we should write out the `numElements` at first 4 bytes,
+ * and numBytes of key array at second 4 bytes, then follows key array content and value array
+ * content without `numElements` header.
+ * When we read in a map, we should read first 4 bytes as `numElements` and second 4 bytes as
+ * numBytes of key array, and construct unsafe key array and value array with these 2 information.
  */
 public class UnsafeMapData extends MapData {
 
-  public final UnsafeArrayData keys;
-  public final UnsafeArrayData values;
+  private final UnsafeArrayData keys;
+  private final UnsafeArrayData values;
   // The number of elements in this array
   private int numElements;
   // The size of this array's backing data, in bytes
@@ -50,12 +55,12 @@ public int numElements() {
   }
 
   @Override
-  public ArrayData keyArray() {
+  public UnsafeArrayData keyArray() {
     return keys;
   }
 
   @Override
-  public ArrayData valueArray() {
+  public UnsafeArrayData valueArray() {
     return values;
   }
 
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java
index 7b03185a30e3..6c5fcbca63fd 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java
@@ -21,6 +21,9 @@
 
 public class UnsafeReaders {
 
+  /**
+   * Reads in unsafe array according to the format described in `UnsafeArrayData`.
+   */
   public static UnsafeArrayData readArray(Object baseObject, long baseOffset, int numBytes) {
     // Read the number of elements from first 4 bytes.
     final int numElements = Platform.getInt(baseObject, baseOffset);
@@ -30,6 +33,9 @@ public static UnsafeArrayData readArray(Object baseObject, long baseOffset, int
     return array;
   }
 
+  /**
+   * Reads in unsafe map according to the format described in `UnsafeMapData`.
+   */
   public static UnsafeMapData readMap(Object baseObject, long baseOffset, int numBytes) {
     // Read the number of elements from first 4 bytes.
     final int numElements = Platform.getInt(baseObject, baseOffset);
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 6c020045c311..e8ac2999c2d2 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -446,7 +446,7 @@ public UnsafeRow getStruct(int ordinal, int numFields) {
   }
 
   @Override
-  public ArrayData getArray(int ordinal) {
+  public UnsafeArrayData getArray(int ordinal) {
     if (isNullAt(ordinal)) {
       return null;
     } else {
@@ -458,7 +458,7 @@ public ArrayData getArray(int ordinal) {
   }
 
   @Override
-  public MapData getMap(int ordinal) {
+  public UnsafeMapData getMap(int ordinal) {
     if (isNullAt(ordinal)) {
       return null;
     } else {
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
index 2f43db68a750..0f1e0202aace 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
@@ -233,8 +233,8 @@ public static int getSize(UnsafeMapData input) {
 
     public static int write(UnsafeRow target, int ordinal, int cursor, UnsafeMapData input) {
       final long offset = target.getBaseOffset() + cursor;
-      final UnsafeArrayData keyArray = input.keys;
-      final UnsafeArrayData valueArray = input.values;
+      final UnsafeArrayData keyArray = input.keyArray();
+      final UnsafeArrayData valueArray = input.valueArray();
       final int keysNumBytes = keyArray.getSizeInBytes();
       final int valuesNumBytes = valueArray.getSizeInBytes();
       final int numBytes = 4 + 4 + keysNumBytes + valuesNumBytes;
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java
index cd83695fca03..ce2d9c4ffbf9 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java
@@ -168,8 +168,8 @@ public static int getSize(UnsafeMapData input) {
     }
 
     public static int write(Object targetObject, long targetOffset, UnsafeMapData input) {
-      final UnsafeArrayData keyArray = input.keys;
-      final UnsafeArrayData valueArray = input.values;
+      final UnsafeArrayData keyArray = input.keyArray();
+      final UnsafeArrayData valueArray = input.valueArray();
       final int keysNumBytes = keyArray.getSizeInBytes();
       final int valuesNumBytes = valueArray.getSizeInBytes();
       final int numBytes = 4 + 4 + keysNumBytes + valuesNumBytes;
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
new file mode 100644
index 000000000000..9c9468678065
--- /dev/null
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.codegen;
+
+import org.apache.spark.unsafe.Platform;
+
+/**
+ * A helper class to manage the row buffer used in `GenerateUnsafeProjection`.
+ *
+ * Note that it is only used in `GenerateUnsafeProjection`, so it's safe to mark member variables
+ * public for ease of use.
+ */
+public class BufferHolder {
+  public byte[] buffer = new byte[64];
+  public int cursor = Platform.BYTE_ARRAY_OFFSET;
+
+  public void grow(int neededSize) {
+    final int length = totalSize() + neededSize;
+    if (buffer.length < length) {
+      // This will not happen frequently, because the buffer is re-used.
+      final byte[] tmp = new byte[length * 2];
+      Platform.copyMemory(
+        buffer,
+        Platform.BYTE_ARRAY_OFFSET,
+        tmp,
+        Platform.BYTE_ARRAY_OFFSET,
+        totalSize());
+      buffer = tmp;
+    }
+  }
+
+  public void reset() {
+    cursor = Platform.BYTE_ARRAY_OFFSET;
+  }
+
+  public int totalSize() {
+    return cursor - Platform.BYTE_ARRAY_OFFSET;
+  }
+}
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
new file mode 100644
index 000000000000..138178ce99d8
--- /dev/null
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
@@ -0,0 +1,151 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.codegen;
+
+import org.apache.spark.sql.catalyst.expressions.UnsafeArrayData;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.types.CalendarInterval;
+import org.apache.spark.unsafe.types.UTF8String;
+
+/**
+ * A helper class to write data into global row buffer using `UnsafeArrayData` format,
+ * used by {@link org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection}.
+ */
+public class UnsafeArrayWriter {
+
+  private BufferHolder holder;
+  // The offset of the global buffer where we start to write this array.
+  private int startingOffset;
+
+  public void initialize(BufferHolder holder, int numElements, int fixedElementSize) {
+    // We need 4 bytes each element to store offset.
+    final int fixedSize = 4 * numElements;
+
+    this.holder = holder;
+    this.startingOffset = holder.cursor;
+
+    holder.grow(fixedSize);
+    holder.cursor += fixedSize;
+
+    // Grows the global buffer ahead for fixed size data.
+    holder.grow(fixedElementSize * numElements);
+  }
+
+  private long getElementOffset(int ordinal) {
+    return startingOffset + 4 * ordinal;
+  }
+
+  public void setNullAt(int ordinal) {
+    final int relativeOffset = holder.cursor - startingOffset;
+    // Writes negative offset value to represent null element.
+    Platform.putInt(holder.buffer, getElementOffset(ordinal), -relativeOffset);
+  }
+
+  public void setOffset(int ordinal) {
+    final int relativeOffset = holder.cursor - startingOffset;
+    Platform.putInt(holder.buffer, getElementOffset(ordinal), relativeOffset);
+  }
+
+  public void writeCompactDecimal(int ordinal, Decimal input, int precision, int scale) {
+    // make sure Decimal object has the same scale as DecimalType
+    if (input.changePrecision(precision, scale)) {
+      Platform.putLong(holder.buffer, holder.cursor, input.toUnscaledLong());
+      setOffset(ordinal);
+      holder.cursor += 8;
+    } else {
+      setNullAt(ordinal);
+    }
+  }
+
+  public void write(int ordinal, Decimal input, int precision, int scale) {
+    // make sure Decimal object has the same scale as DecimalType
+    if (input.changePrecision(precision, scale)) {
+      final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
+      assert bytes.length <= 16;
+      holder.grow(bytes.length);
+
+      // Write the bytes to the variable length portion.
+      Platform.copyMemory(
+        bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
+      setOffset(ordinal);
+      holder.cursor += bytes.length;
+    } else {
+      setNullAt(ordinal);
+    }
+  }
+
+  public void write(int ordinal, UTF8String input) {
+    final int numBytes = input.numBytes();
+
+    // grow the global buffer before writing data.
+    holder.grow(numBytes);
+
+    // Write the bytes to the variable length portion.
+    input.writeToMemory(holder.buffer, holder.cursor);
+
+    setOffset(ordinal);
+
+    // move the cursor forward.
+    holder.cursor += numBytes;
+  }
+
+  public void write(int ordinal, byte[] input) {
+    // grow the global buffer before writing data.
+    holder.grow(input.length);
+
+    // Write the bytes to the variable length portion.
+    Platform.copyMemory(
+      input, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, input.length);
+
+    setOffset(ordinal);
+
+    // move the cursor forward.
+    holder.cursor += input.length;
+  }
+
+  public void write(int ordinal, CalendarInterval input) {
+    // grow the global buffer before writing data.
+    holder.grow(16);
+
+    // Write the months and microseconds fields of Interval to the variable length portion.
+    Platform.putLong(holder.buffer, holder.cursor, input.months);
+    Platform.putLong(holder.buffer, holder.cursor + 8, input.microseconds);
+
+    setOffset(ordinal);
+
+    // move the cursor forward.
+    holder.cursor += 16;
+  }
+
+
+
+  // If this array is already an UnsafeArray, we don't need to go through all elements, we can
+  // directly write it.
+  public static void directWrite(BufferHolder holder, UnsafeArrayData input) {
+    final int numBytes = input.getSizeInBytes();
+
+    // grow the global buffer before writing data.
+    holder.grow(numBytes);
+
+    // Writes the array content to the variable length portion.
+    input.writeToMemory(holder.buffer, holder.cursor);
+
+    holder.cursor += numBytes;
+  }
+}
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
new file mode 100644
index 000000000000..8b7debd44003
--- /dev/null
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
@@ -0,0 +1,199 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.codegen;
+
+import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.ByteArrayMethods;
+import org.apache.spark.unsafe.bitset.BitSetMethods;
+import org.apache.spark.unsafe.types.CalendarInterval;
+import org.apache.spark.unsafe.types.UTF8String;
+
+/**
+ * A helper class to write data into global row buffer using `UnsafeRow` format,
+ * used by {@link org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection}.
+ */
+public class UnsafeRowWriter {
+
+  private BufferHolder holder;
+  // The offset of the global buffer where we start to write this row.
+  private int startingOffset;
+  private int nullBitsSize;
+
+  public void initialize(BufferHolder holder, int numFields) {
+    this.holder = holder;
+    this.startingOffset = holder.cursor;
+    this.nullBitsSize = UnsafeRow.calculateBitSetWidthInBytes(numFields);
+
+    // grow the global buffer to make sure it has enough space to write fixed-length data.
+    final int fixedSize = nullBitsSize + 8 * numFields;
+    holder.grow(fixedSize);
+    holder.cursor += fixedSize;
+
+    // zero-out the null bits region
+    for (int i = 0; i < nullBitsSize; i += 8) {
+      Platform.putLong(holder.buffer, startingOffset + i, 0L);
+    }
+  }
+
+  private void zeroOutPaddingBytes(int numBytes) {
+    if ((numBytes & 0x07) > 0) {
+      Platform.putLong(holder.buffer, holder.cursor + ((numBytes >> 3) << 3), 0L);
+    }
+  }
+
+  public void setNullAt(int ordinal) {
+    BitSetMethods.set(holder.buffer, startingOffset, ordinal);
+    Platform.putLong(holder.buffer, getFieldOffset(ordinal), 0L);
+  }
+
+  public long getFieldOffset(int ordinal) {
+    return startingOffset + nullBitsSize + 8 * ordinal;
+  }
+
+  public void setOffsetAndSize(int ordinal, long size) {
+    setOffsetAndSize(ordinal, holder.cursor, size);
+  }
+
+  public void setOffsetAndSize(int ordinal, long currentCursor, long size) {
+    final long relativeOffset = currentCursor - startingOffset;
+    final long fieldOffset = getFieldOffset(ordinal);
+    final long offsetAndSize = (relativeOffset << 32) | size;
+
+    Platform.putLong(holder.buffer, fieldOffset, offsetAndSize);
+  }
+
+  // Do word alignment for this row and grow the row buffer if needed.
+  // todo: remove this after we make unsafe array data word align.
+  public void alignToWords(int numBytes) {
+    final int remainder = numBytes & 0x07;
+
+    if (remainder > 0) {
+      final int paddingBytes = 8 - remainder;
+      holder.grow(paddingBytes);
+
+      for (int i = 0; i < paddingBytes; i++) {
+        Platform.putByte(holder.buffer, holder.cursor, (byte) 0);
+        holder.cursor++;
+      }
+    }
+  }
+
+  public void writeCompactDecimal(int ordinal, Decimal input, int precision, int scale) {
+    // make sure Decimal object has the same scale as DecimalType
+    if (input.changePrecision(precision, scale)) {
+      Platform.putLong(holder.buffer, getFieldOffset(ordinal), input.toUnscaledLong());
+    } else {
+      setNullAt(ordinal);
+    }
+  }
+
+  public void write(int ordinal, Decimal input, int precision, int scale) {
+    // grow the global buffer before writing data.
+    holder.grow(16);
+
+    // zero-out the bytes
+    Platform.putLong(holder.buffer, holder.cursor, 0L);
+    Platform.putLong(holder.buffer, holder.cursor + 8, 0L);
+
+    // Make sure Decimal object has the same scale as DecimalType.
+    // Note that we may pass in null Decimal object to set null for it.
+    if (input == null || !input.changePrecision(precision, scale)) {
+      BitSetMethods.set(holder.buffer, startingOffset, ordinal);
+      // keep the offset for future update
+      setOffsetAndSize(ordinal, 0L);
+    } else {
+      final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
+      assert bytes.length <= 16;
+
+      // Write the bytes to the variable length portion.
+      Platform.copyMemory(
+        bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
+      setOffsetAndSize(ordinal, bytes.length);
+    }
+
+    // move the cursor forward.
+    holder.cursor += 16;
+  }
+
+  public void write(int ordinal, UTF8String input) {
+    final int numBytes = input.numBytes();
+    final int roundedSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
+
+    // grow the global buffer before writing data.
+    holder.grow(roundedSize);
+
+    zeroOutPaddingBytes(numBytes);
+
+    // Write the bytes to the variable length portion.
+    input.writeToMemory(holder.buffer, holder.cursor);
+
+    setOffsetAndSize(ordinal, numBytes);
+
+    // move the cursor forward.
+    holder.cursor += roundedSize;
+  }
+
+  public void write(int ordinal, byte[] input) {
+    final int numBytes = input.length;
+    final int roundedSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
+
+    // grow the global buffer before writing data.
+    holder.grow(roundedSize);
+
+    zeroOutPaddingBytes(numBytes);
+
+    // Write the bytes to the variable length portion.
+    Platform.copyMemory(input, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, numBytes);
+
+    setOffsetAndSize(ordinal, numBytes);
+
+    // move the cursor forward.
+    holder.cursor += roundedSize;
+  }
+
+  public void write(int ordinal, CalendarInterval input) {
+    // grow the global buffer before writing data.
+    holder.grow(16);
+
+    // Write the months and microseconds fields of Interval to the variable length portion.
+    Platform.putLong(holder.buffer, holder.cursor, input.months);
+    Platform.putLong(holder.buffer, holder.cursor + 8, input.microseconds);
+
+    setOffsetAndSize(ordinal, 16);
+
+    // move the cursor forward.
+    holder.cursor += 16;
+  }
+
+
+
+  // If this struct is already an UnsafeRow, we don't need to go through all fields, we can
+  // directly write it.
+  public static void directWrite(BufferHolder holder, UnsafeRow input) {
+    // No need to zero-out the bytes as UnsafeRow is word aligned for sure.
+    final int numBytes = input.getSizeInBytes();
+    // grow the global buffer before writing data.
+    holder.grow(numBytes);
+    // Write the bytes to the variable length portion.
+    input.writeToMemory(holder.buffer, holder.cursor);
+    // move the cursor forward.
+    holder.cursor += numBytes;
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index da3103b4ebb6..9a2878113304 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -272,6 +272,7 @@ class CodeGenContext {
    * 64kb code size limit in JVM
    *
    * @param row the variable name of row that is used by expressions
+   * @param expressions the codes to evaluate expressions.
    */
   def splitExpressions(row: String, expressions: Seq[String]): String = {
     val blocks = new ArrayBuffer[String]()
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 55562facf965..99bf50a84571 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -393,10 +393,292 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     case _ => input
   }
 
+  private val rowWriterClass = classOf[UnsafeRowWriter].getName
+  private val arrayWriterClass = classOf[UnsafeArrayWriter].getName
+
+  // TODO: if the nullability of field is correct, we can use it to save null check.
+  private def writeStructToBuffer(
+      ctx: CodeGenContext,
+      input: String,
+      fieldTypes: Seq[DataType],
+      bufferHolder: String): String = {
+    val fieldEvals = fieldTypes.zipWithIndex.map { case (dt, i) =>
+      val fieldName = ctx.freshName("fieldName")
+      val code = s"final ${ctx.javaType(dt)} $fieldName = ${ctx.getValue(input, dt, i.toString)};"
+      val isNull = s"$input.isNullAt($i)"
+      GeneratedExpressionCode(code, isNull, fieldName)
+    }
+
+    s"""
+      if ($input instanceof UnsafeRow) {
+        $rowWriterClass.directWrite($bufferHolder, (UnsafeRow) $input);
+      } else {
+        ${writeExpressionsToBuffer(ctx, input, fieldEvals, fieldTypes, bufferHolder)}
+      }
+    """
+  }
+
+  private def writeExpressionsToBuffer(
+      ctx: CodeGenContext,
+      row: String,
+      inputs: Seq[GeneratedExpressionCode],
+      inputTypes: Seq[DataType],
+      bufferHolder: String): String = {
+    val rowWriter = ctx.freshName("rowWriter")
+    ctx.addMutableState(rowWriterClass, rowWriter, s"this.$rowWriter = new $rowWriterClass();")
+
+    val writeFields = inputs.zip(inputTypes).zipWithIndex.map {
+      case ((input, dt), index) =>
+        val tmpCursor = ctx.freshName("tmpCursor")
+
+        val setNull = dt match {
+          case t: DecimalType if t.precision > Decimal.MAX_LONG_DIGITS =>
+            // Can't call setNullAt() for DecimalType with precision larger than 18.
+            s"$rowWriter.write($index, null, ${t.precision}, ${t.scale});"
+          case _ => s"$rowWriter.setNullAt($index);"
+        }
+
+        val writeField = dt match {
+          case t: StructType =>
+            s"""
+              // Remember the current cursor so that we can calculate how many bytes are
+              // written later.
+              final int $tmpCursor = $bufferHolder.cursor;
+              ${writeStructToBuffer(ctx, input.primitive, t.map(_.dataType), bufferHolder)}
+              $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
+            """
+
+          case a @ ArrayType(et, _) =>
+            s"""
+              // Remember the current cursor so that we can calculate how many bytes are
+              // written later.
+              final int $tmpCursor = $bufferHolder.cursor;
+              ${writeArrayToBuffer(ctx, input.primitive, et, bufferHolder)}
+              $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
+              $rowWriter.alignToWords($bufferHolder.cursor - $tmpCursor);
+            """
+
+          case m @ MapType(kt, vt, _) =>
+            s"""
+              // Remember the current cursor so that we can calculate how many bytes are
+              // written later.
+              final int $tmpCursor = $bufferHolder.cursor;
+              ${writeMapToBuffer(ctx, input.primitive, kt, vt, bufferHolder)}
+              $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
+              $rowWriter.alignToWords($bufferHolder.cursor - $tmpCursor);
+            """
+
+          case _ if ctx.isPrimitiveType(dt) =>
+            val fieldOffset = ctx.freshName("fieldOffset")
+            s"""
+              final long $fieldOffset = $rowWriter.getFieldOffset($index);
+              Platform.putLong($bufferHolder.buffer, $fieldOffset, 0L);
+              ${writePrimitiveType(ctx, input.primitive, dt, s"$bufferHolder.buffer", fieldOffset)}
+            """
+
+          case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
+            s"$rowWriter.writeCompactDecimal($index, ${input.primitive}, " +
+              s"${t.precision}, ${t.scale});"
+
+          case t: DecimalType =>
+            s"$rowWriter.write($index, ${input.primitive}, ${t.precision}, ${t.scale});"
+
+          case NullType => ""
+
+          case _ => s"$rowWriter.write($index, ${input.primitive});"
+        }
+
+        s"""
+          ${input.code}
+          if (${input.isNull}) {
+            $setNull
+          } else {
+            $writeField
+          }
+        """
+    }
+
+    s"""
+      $rowWriter.initialize($bufferHolder, ${inputs.length});
+      ${ctx.splitExpressions(row, writeFields)}
+    """
+  }
+
+  // TODO: if the nullability of array element is correct, we can use it to save null check.
+  private def writeArrayToBuffer(
+      ctx: CodeGenContext,
+      input: String,
+      elementType: DataType,
+      bufferHolder: String,
+      needHeader: Boolean = true): String = {
+    val arrayWriter = ctx.freshName("arrayWriter")
+    ctx.addMutableState(arrayWriterClass, arrayWriter,
+      s"this.$arrayWriter = new $arrayWriterClass();")
+    val numElements = ctx.freshName("numElements")
+    val index = ctx.freshName("index")
+    val element = ctx.freshName("element")
+
+    val jt = ctx.javaType(elementType)
+
+    val fixedElementSize = elementType match {
+      case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS => 8
+      case _ if ctx.isPrimitiveType(jt) => elementType.defaultSize
+      case _ => 0
+    }
+
+    val writeElement = elementType match {
+      case t: StructType =>
+        s"""
+          $arrayWriter.setOffset($index);
+          ${writeStructToBuffer(ctx, element, t.map(_.dataType), bufferHolder)}
+        """
+
+      case a @ ArrayType(et, _) =>
+        s"""
+          $arrayWriter.setOffset($index);
+          ${writeArrayToBuffer(ctx, element, et, bufferHolder)}
+        """
+
+      case m @ MapType(kt, vt, _) =>
+        s"""
+          $arrayWriter.setOffset($index);
+          ${writeMapToBuffer(ctx, element, kt, vt, bufferHolder)}
+        """
+
+      case _ if ctx.isPrimitiveType(elementType) =>
+        // Should we do word align?
+        val dataSize = elementType.defaultSize
+
+        s"""
+          $arrayWriter.setOffset($index);
+          ${writePrimitiveType(ctx, element, elementType,
+            s"$bufferHolder.buffer", s"$bufferHolder.cursor")}
+          $bufferHolder.cursor += $dataSize;
+        """
+
+      case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
+        s"$arrayWriter.writeCompactDecimal($index, $element, ${t.precision}, ${t.scale});"
+
+      case t: DecimalType =>
+        s"$arrayWriter.write($index, $element, ${t.precision}, ${t.scale});"
+
+      case NullType => ""
+
+      case _ => s"$arrayWriter.write($index, $element);"
+    }
+
+    val writeHeader = if (needHeader) {
+      // If header is required, we need to write the number of elements into first 4 bytes.
+      s"""
+        $bufferHolder.grow(4);
+        Platform.putInt($bufferHolder.buffer, $bufferHolder.cursor, $numElements);
+        $bufferHolder.cursor += 4;
+      """
+    } else ""
+
+    s"""
+      final int $numElements = $input.numElements();
+      $writeHeader
+      if ($input instanceof UnsafeArrayData) {
+        $arrayWriterClass.directWrite($bufferHolder, (UnsafeArrayData) $input);
+      } else {
+        $arrayWriter.initialize($bufferHolder, $numElements, $fixedElementSize);
+
+        for (int $index = 0; $index < $numElements; $index++) {
+          if ($input.isNullAt($index)) {
+            $arrayWriter.setNullAt($index);
+          } else {
+            final $jt $element = ${ctx.getValue(input, elementType, index)};
+            $writeElement
+          }
+        }
+      }
+    """
+  }
+
+  // TODO: if the nullability of value element is correct, we can use it to save null check.
+  private def writeMapToBuffer(
+      ctx: CodeGenContext,
+      input: String,
+      keyType: DataType,
+      valueType: DataType,
+      bufferHolder: String): String = {
+    val keys = ctx.freshName("keys")
+    val values = ctx.freshName("values")
+    val tmpCursor = ctx.freshName("tmpCursor")
+
+
+    // Writes out unsafe map according to the format described in `UnsafeMapData`.
+    s"""
+      final ArrayData $keys = $input.keyArray();
+      final ArrayData $values = $input.valueArray();
+
+      $bufferHolder.grow(8);
+
+      // Write the numElements into first 4 bytes.
+      Platform.putInt($bufferHolder.buffer, $bufferHolder.cursor, $keys.numElements());
+
+      $bufferHolder.cursor += 8;
+      // Remember the current cursor so that we can write numBytes of key array later.
+      final int $tmpCursor = $bufferHolder.cursor;
+
+      ${writeArrayToBuffer(ctx, keys, keyType, bufferHolder, needHeader = false)}
+      // Write the numBytes of key array into second 4 bytes.
+      Platform.putInt($bufferHolder.buffer, $tmpCursor - 4, $bufferHolder.cursor - $tmpCursor);
+
+      ${writeArrayToBuffer(ctx, values, valueType, bufferHolder, needHeader = false)}
+    """
+  }
+
+  private def writePrimitiveType(
+      ctx: CodeGenContext,
+      input: String,
+      dt: DataType,
+      buffer: String,
+      offset: String) = {
+    assert(ctx.isPrimitiveType(dt))
+
+    val putMethod = s"put${ctx.primitiveTypeName(dt)}"
+
+    dt match {
+      case FloatType | DoubleType =>
+        val normalized = ctx.freshName("normalized")
+        val boxedType = ctx.boxedType(dt)
+        val handleNaN =
+          s"""
+            final ${ctx.javaType(dt)} $normalized;
+            if ($boxedType.isNaN($input)) {
+              $normalized = $boxedType.NaN;
+            } else {
+              $normalized = $input;
+            }
+          """
+
+        s"""
+          $handleNaN
+          Platform.$putMethod($buffer, $offset, $normalized);
+        """
+      case _ => s"Platform.$putMethod($buffer, $offset, $input);"
+    }
+  }
+
   def createCode(ctx: CodeGenContext, expressions: Seq[Expression]): GeneratedExpressionCode = {
     val exprEvals = expressions.map(e => e.gen(ctx))
     val exprTypes = expressions.map(_.dataType)
-    createCodeForStruct(ctx, "i", exprEvals, exprTypes)
+
+    val result = ctx.freshName("result")
+    ctx.addMutableState("UnsafeRow", result, s"this.$result = new UnsafeRow();")
+    val bufferHolder = ctx.freshName("bufferHolder")
+    val holderClass = classOf[BufferHolder].getName
+    ctx.addMutableState(holderClass, bufferHolder, s"this.$bufferHolder = new $holderClass();")
+
+    val code =
+      s"""
+        $bufferHolder.reset();
+        ${writeExpressionsToBuffer(ctx, "i", exprEvals, exprTypes, bufferHolder)}
+        $result.pointTo($bufferHolder.buffer, ${expressions.length}, $bufferHolder.totalSize());
+      """
+    GeneratedExpressionCode(code, "false", result)
   }
 
   protected def canonicalize(in: Seq[Expression]): Seq[Expression] =
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
index 8c7220319363..c991cd86d28c 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import java.sql.{Date, Timestamp}
-import java.util.Arrays
 
 import org.scalatest.Matchers
 
@@ -43,7 +42,7 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     row.setInt(2, 2)
 
     val unsafeRow: UnsafeRow = converter.apply(row)
-    assert(converter.apply(row).getSizeInBytes === 8 + (3 * 8))
+    assert(unsafeRow.getSizeInBytes === 8 + (3 * 8))
     assert(unsafeRow.getLong(0) === 0)
     assert(unsafeRow.getLong(1) === 1)
     assert(unsafeRow.getInt(2) === 2)
@@ -62,6 +61,13 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     assert(unsafeRowCopy.getLong(0) === 0)
     assert(unsafeRowCopy.getLong(1) === 1)
     assert(unsafeRowCopy.getInt(2) === 2)
+
+    // Make sure the converter can be reused, i.e. we correctly reset all states.
+    val unsafeRow2: UnsafeRow = converter.apply(row)
+    assert(unsafeRow2.getSizeInBytes === 8 + (3 * 8))
+    assert(unsafeRow2.getLong(0) === 0)
+    assert(unsafeRow2.getLong(1) === 1)
+    assert(unsafeRow2.getInt(2) === 2)
   }
 
   test("basic conversion with primitive, string and binary types") {
@@ -176,7 +182,6 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       r
     }
 
-    // todo: we reuse the UnsafeRow in projection, so these tests are meaningless.
     val setToNullAfterCreation = converter.apply(rowWithNoNullColumns)
     assert(setToNullAfterCreation.isNullAt(0) === rowWithNoNullColumns.isNullAt(0))
     assert(setToNullAfterCreation.getBoolean(1) === rowWithNoNullColumns.getBoolean(1))
@@ -192,7 +197,6 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       rowWithNoNullColumns.getDecimal(10, 10, 0))
     assert(setToNullAfterCreation.getDecimal(11, 38, 18) ===
       rowWithNoNullColumns.getDecimal(11, 38, 18))
-    // assert(setToNullAfterCreation.get(11) === rowWithNoNullColumns.get(11))
 
     for (i <- fieldTypes.indices) {
       // Cann't call setNullAt() on DecimalType
@@ -202,8 +206,6 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
         setToNullAfterCreation.setNullAt(i)
       }
     }
-    // There are some garbage left in the var-length area
-    assert(Arrays.equals(createdFromNull.getBytes, setToNullAfterCreation.getBytes()))
 
     setToNullAfterCreation.setNullAt(0)
     setToNullAfterCreation.setBoolean(1, false)
@@ -251,107 +253,274 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     assert(converter.apply(row1).getBytes === converter.apply(row2).getBytes)
   }
 
+  test("basic conversion with struct type") {
+    val fieldTypes: Array[DataType] = Array(
+      new StructType().add("i", IntegerType),
+      new StructType().add("nest", new StructType().add("l", LongType))
+    )
+
+    val converter = UnsafeProjection.create(fieldTypes)
+
+    val row = new GenericMutableRow(fieldTypes.length)
+    row.update(0, InternalRow(1))
+    row.update(1, InternalRow(InternalRow(2L)))
+
+    val unsafeRow: UnsafeRow = converter.apply(row)
+    assert(unsafeRow.numFields == 2)
+
+    val row1 = unsafeRow.getStruct(0, 1)
+    assert(row1.getSizeInBytes == 8 + 1 * 8)
+    assert(row1.numFields == 1)
+    assert(row1.getInt(0) == 1)
+
+    val row2 = unsafeRow.getStruct(1, 1)
+    assert(row2.numFields() == 1)
+
+    val innerRow = row2.getStruct(0, 1)
+
+    {
+      assert(innerRow.getSizeInBytes == 8 + 1 * 8)
+      assert(innerRow.numFields == 1)
+      assert(innerRow.getLong(0) == 2L)
+    }
+
+    assert(row2.getSizeInBytes == 8 + 1 * 8 + innerRow.getSizeInBytes)
+
+    assert(unsafeRow.getSizeInBytes == 8 + 2 * 8 + row1.getSizeInBytes + row2.getSizeInBytes)
+  }
+
+  private def createArray(values: Any*): ArrayData = new GenericArrayData(values.toArray)
+
+  private def createMap(keys: Any*)(values: Any*): MapData = {
+    assert(keys.length == values.length)
+    new ArrayBasedMapData(createArray(keys: _*), createArray(values: _*))
+  }
+
+  private def arraySizeInRow(numBytes: Int): Int = roundedSize(4 + numBytes)
+
+  private def mapSizeInRow(numBytes: Int): Int = roundedSize(8 + numBytes)
+
+  private def testArrayInt(array: UnsafeArrayData, values: Seq[Int]): Unit = {
+    assert(array.numElements == values.length)
+    assert(array.getSizeInBytes == (4 + 4) * values.length)
+    values.zipWithIndex.foreach {
+      case (value, index) => assert(array.getInt(index) == value)
+    }
+  }
+
+  private def testMapInt(map: UnsafeMapData, keys: Seq[Int], values: Seq[Int]): Unit = {
+    assert(keys.length == values.length)
+    assert(map.numElements == keys.length)
+
+    testArrayInt(map.keyArray, keys)
+    testArrayInt(map.valueArray, values)
+
+    assert(map.getSizeInBytes == map.keyArray.getSizeInBytes + map.valueArray.getSizeInBytes)
+  }
+
   test("basic conversion with array type") {
     val fieldTypes: Array[DataType] = Array(
-      ArrayType(LongType),
-      ArrayType(ArrayType(LongType))
+      ArrayType(IntegerType),
+      ArrayType(ArrayType(IntegerType))
     )
     val converter = UnsafeProjection.create(fieldTypes)
 
-    val array1 = new GenericArrayData(Array[Any](1L, 2L))
-    val array2 = new GenericArrayData(Array[Any](new GenericArrayData(Array[Any](3L, 4L))))
     val row = new GenericMutableRow(fieldTypes.length)
-    row.update(0, array1)
-    row.update(1, array2)
+    row.update(0, createArray(1, 2))
+    row.update(1, createArray(createArray(3, 4)))
 
     val unsafeRow: UnsafeRow = converter.apply(row)
     assert(unsafeRow.numFields() == 2)
 
-    val unsafeArray1 = unsafeRow.getArray(0).asInstanceOf[UnsafeArrayData]
-    assert(unsafeArray1.getSizeInBytes == 4 * 2 + 8 * 2)
-    assert(unsafeArray1.numElements() == 2)
-    assert(unsafeArray1.getLong(0) == 1L)
-    assert(unsafeArray1.getLong(1) == 2L)
+    val unsafeArray1 = unsafeRow.getArray(0)
+    testArrayInt(unsafeArray1, Seq(1, 2))
 
-    val unsafeArray2 = unsafeRow.getArray(1).asInstanceOf[UnsafeArrayData]
-    assert(unsafeArray2.numElements() == 1)
+    val unsafeArray2 = unsafeRow.getArray(1)
+    assert(unsafeArray2.numElements == 1)
 
-    val nestedArray = unsafeArray2.getArray(0).asInstanceOf[UnsafeArrayData]
-    assert(nestedArray.getSizeInBytes == 4 * 2 + 8 * 2)
-    assert(nestedArray.numElements() == 2)
-    assert(nestedArray.getLong(0) == 3L)
-    assert(nestedArray.getLong(1) == 4L)
+    val nestedArray = unsafeArray2.getArray(0)
+    testArrayInt(nestedArray, Seq(3, 4))
 
-    assert(unsafeArray2.getSizeInBytes == 4 + 4 + nestedArray.getSizeInBytes)
+    assert(unsafeArray2.getSizeInBytes == 4 + (4 + nestedArray.getSizeInBytes))
 
-    val array1Size = roundedSize(4 + unsafeArray1.getSizeInBytes)
-    val array2Size = roundedSize(4 + unsafeArray2.getSizeInBytes)
+    val array1Size = arraySizeInRow(unsafeArray1.getSizeInBytes)
+    val array2Size = arraySizeInRow(unsafeArray2.getSizeInBytes)
     assert(unsafeRow.getSizeInBytes == 8 + 8 * 2 + array1Size + array2Size)
   }
 
   test("basic conversion with map type") {
-    def createArray(values: Any*): ArrayData = new GenericArrayData(values.toArray)
+    val fieldTypes: Array[DataType] = Array(
+      MapType(IntegerType, IntegerType),
+      MapType(IntegerType, MapType(IntegerType, IntegerType))
+    )
+    val converter = UnsafeProjection.create(fieldTypes)
 
-    def testIntLongMap(map: UnsafeMapData, keys: Array[Int], values: Array[Long]): Unit = {
-      val numElements = keys.length
-      assert(map.numElements() == numElements)
+    val map1 = createMap(1, 2)(3, 4)
 
-      val keyArray = map.keys
-      assert(keyArray.getSizeInBytes == 4 * numElements + 4 * numElements)
-      assert(keyArray.numElements() == numElements)
-      keys.zipWithIndex.foreach { case (key, i) =>
-        assert(keyArray.getInt(i) == key)
-      }
+    val innerMap = createMap(5, 6)(7, 8)
+    val map2 = createMap(9)(innerMap)
 
-      val valueArray = map.values
-      assert(valueArray.getSizeInBytes == 4 * numElements + 8 * numElements)
-      assert(valueArray.numElements() == numElements)
-      values.zipWithIndex.foreach { case (value, i) =>
-        assert(valueArray.getLong(i) == value)
-      }
+    val row = new GenericMutableRow(fieldTypes.length)
+    row.update(0, map1)
+    row.update(1, map2)
 
-      assert(map.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+    val unsafeRow: UnsafeRow = converter.apply(row)
+    assert(unsafeRow.numFields == 2)
+
+    val unsafeMap1 = unsafeRow.getMap(0)
+    testMapInt(unsafeMap1, Seq(1, 2), Seq(3, 4))
+
+    val unsafeMap2 = unsafeRow.getMap(1)
+    assert(unsafeMap2.numElements == 1)
+
+    val keyArray = unsafeMap2.keyArray
+    testArrayInt(keyArray, Seq(9))
+
+    val valueArray = unsafeMap2.valueArray
+
+    {
+      assert(valueArray.numElements == 1)
+
+      val nestedMap = valueArray.getMap(0)
+      testMapInt(nestedMap, Seq(5, 6), Seq(7, 8))
+
+      assert(valueArray.getSizeInBytes == 4 + (8 + nestedMap.getSizeInBytes))
     }
 
+    assert(unsafeMap2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+
+    val map1Size = mapSizeInRow(unsafeMap1.getSizeInBytes)
+    val map2Size = mapSizeInRow(unsafeMap2.getSizeInBytes)
+    assert(unsafeRow.getSizeInBytes == 8 + 8 * 2 + map1Size + map2Size)
+  }
+
+  test("basic conversion with struct and array") {
     val fieldTypes: Array[DataType] = Array(
-      MapType(IntegerType, LongType),
-      MapType(IntegerType, MapType(IntegerType, LongType))
+      new StructType().add("arr", ArrayType(IntegerType)),
+      ArrayType(new StructType().add("l", LongType))
     )
     val converter = UnsafeProjection.create(fieldTypes)
 
-    val map1 = new ArrayBasedMapData(createArray(1, 2), createArray(3L, 4L))
+    val row = new GenericMutableRow(fieldTypes.length)
+    row.update(0, InternalRow(createArray(1)))
+    row.update(1, createArray(InternalRow(2L)))
+
+    val unsafeRow: UnsafeRow = converter.apply(row)
+    assert(unsafeRow.numFields() == 2)
+
+    val field1 = unsafeRow.getStruct(0, 1)
+    assert(field1.numFields == 1)
+
+    val innerArray = field1.getArray(0)
+    testArrayInt(innerArray, Seq(1))
 
-    val innerMap = new ArrayBasedMapData(createArray(5, 6), createArray(7L, 8L))
-    val map2 = new ArrayBasedMapData(createArray(9), createArray(innerMap))
+    assert(field1.getSizeInBytes == 8 + 8 + arraySizeInRow(innerArray.getSizeInBytes))
+
+    val field2 = unsafeRow.getArray(1)
+    assert(field2.numElements == 1)
+
+    val innerStruct = field2.getStruct(0, 1)
+
+    {
+      assert(innerStruct.numFields == 1)
+      assert(innerStruct.getSizeInBytes == 8 + 8)
+      assert(innerStruct.getLong(0) == 2L)
+    }
+
+    assert(field2.getSizeInBytes == 4 + innerStruct.getSizeInBytes)
+
+    assert(unsafeRow.getSizeInBytes ==
+      8 + 8 * 2 + field1.getSizeInBytes + arraySizeInRow(field2.getSizeInBytes))
+  }
+
+  test("basic conversion with struct and map") {
+    val fieldTypes: Array[DataType] = Array(
+      new StructType().add("map", MapType(IntegerType, IntegerType)),
+      MapType(IntegerType, new StructType().add("l", LongType))
+    )
+    val converter = UnsafeProjection.create(fieldTypes)
 
     val row = new GenericMutableRow(fieldTypes.length)
-    row.update(0, map1)
-    row.update(1, map2)
+    row.update(0, InternalRow(createMap(1)(2)))
+    row.update(1, createMap(3)(InternalRow(4L)))
 
     val unsafeRow: UnsafeRow = converter.apply(row)
     assert(unsafeRow.numFields() == 2)
 
-    val unsafeMap1 = unsafeRow.getMap(0).asInstanceOf[UnsafeMapData]
-    testIntLongMap(unsafeMap1, Array(1, 2), Array(3L, 4L))
+    val field1 = unsafeRow.getStruct(0, 1)
+    assert(field1.numFields == 1)
 
-    val unsafeMap2 = unsafeRow.getMap(1).asInstanceOf[UnsafeMapData]
-    assert(unsafeMap2.numElements() == 1)
+    val innerMap = field1.getMap(0)
+    testMapInt(innerMap, Seq(1), Seq(2))
 
-    val keyArray = unsafeMap2.keys
-    assert(keyArray.getSizeInBytes == 4 + 4)
-    assert(keyArray.numElements() == 1)
-    assert(keyArray.getInt(0) == 9)
+    assert(field1.getSizeInBytes == 8 + 8 + mapSizeInRow(innerMap.getSizeInBytes))
 
-    val valueArray = unsafeMap2.values
-    assert(valueArray.numElements() == 1)
-    val nestedMap = valueArray.getMap(0).asInstanceOf[UnsafeMapData]
-    testIntLongMap(nestedMap, Array(5, 6), Array(7L, 8L))
-    assert(valueArray.getSizeInBytes == 4 + 8 + nestedMap.getSizeInBytes)
+    val field2 = unsafeRow.getMap(1)
 
-    assert(unsafeMap2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+    val keyArray = field2.keyArray
+    testArrayInt(keyArray, Seq(3))
 
-    val map1Size = roundedSize(8 + unsafeMap1.getSizeInBytes)
-    val map2Size = roundedSize(8 + unsafeMap2.getSizeInBytes)
-    assert(unsafeRow.getSizeInBytes == 8 + 8 * 2 + map1Size + map2Size)
+    val valueArray = field2.valueArray
+
+    {
+      assert(valueArray.numElements == 1)
+
+      val innerStruct = valueArray.getStruct(0, 1)
+      assert(innerStruct.numFields == 1)
+      assert(innerStruct.getSizeInBytes == 8 + 8)
+      assert(innerStruct.getLong(0) == 4L)
+
+      assert(valueArray.getSizeInBytes == 4 + innerStruct.getSizeInBytes)
+    }
+
+    assert(field2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+
+    assert(unsafeRow.getSizeInBytes ==
+      8 + 8 * 2 + field1.getSizeInBytes + mapSizeInRow(field2.getSizeInBytes))
+  }
+
+  test("basic conversion with array and map") {
+    val fieldTypes: Array[DataType] = Array(
+      ArrayType(MapType(IntegerType, IntegerType)),
+      MapType(IntegerType, ArrayType(IntegerType))
+    )
+    val converter = UnsafeProjection.create(fieldTypes)
+
+    val row = new GenericMutableRow(fieldTypes.length)
+    row.update(0, createArray(createMap(1)(2)))
+    row.update(1, createMap(3)(createArray(4)))
+
+    val unsafeRow: UnsafeRow = converter.apply(row)
+    assert(unsafeRow.numFields() == 2)
+
+    val field1 = unsafeRow.getArray(0)
+    assert(field1.numElements == 1)
+
+    val innerMap = field1.getMap(0)
+    testMapInt(innerMap, Seq(1), Seq(2))
+
+    assert(field1.getSizeInBytes == 4 + (8 + innerMap.getSizeInBytes))
+
+    val field2 = unsafeRow.getMap(1)
+    assert(field2.numElements == 1)
+
+    val keyArray = field2.keyArray
+    testArrayInt(keyArray, Seq(3))
+
+    val valueArray = field2.valueArray
+
+    {
+      assert(valueArray.numElements == 1)
+
+      val innerArray = valueArray.getArray(0)
+      testArrayInt(innerArray, Seq(4))
+
+      assert(valueArray.getSizeInBytes == 4 + (4 + innerArray.getSizeInBytes))
+    }
+
+    assert(field2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+
+    assert(unsafeRow.getSizeInBytes ==
+      8 + 8 * 2 + arraySizeInRow(field1.getSizeInBytes) + mapSizeInRow(field2.getSizeInBytes))
   }
 }

From a609eb20d964a7b92f1066300443415f6db181e3 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Mon, 5 Oct 2015 17:30:54 -0700
Subject: [PATCH 143/896] [SPARK-10934] [SQL] handle hashCode of unsafe array
 correctly

`Murmur3_x86_32.hashUnsafeWords` only accepts word-aligned bytes, but unsafe array is not.

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8987 from cloud-fan/hash.
---
 .../spark/sql/catalyst/expressions/UnsafeArrayData.java    | 6 +++++-
 .../test/scala/org/apache/spark/sql/UnsafeRowSuite.scala   | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index da9538b3f13c..6a16d3408316 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -285,7 +285,11 @@ public UnsafeMapData getMap(int ordinal) {
 
   @Override
   public int hashCode() {
-    return Murmur3_x86_32.hashUnsafeWords(baseObject, baseOffset, sizeInBytes, 42);
+    int result = 37;
+    for (int i = 0; i < sizeInBytes; i++) {
+      result = 37 * result + Platform.getByte(baseObject, baseOffset + i);
+    }
+    return result;
   }
 
   @Override
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
index 2476b10e3cf9..944d4e11348c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
@@ -131,4 +131,11 @@ class UnsafeRowSuite extends SparkFunSuite {
     assert(emptyRow.getInt(0) === unsafeRow.getInt(0))
     assert(emptyRow.getUTF8String(1) === unsafeRow.getUTF8String(1))
   }
+
+  test("calling hashCode on unsafe array returned by getArray(ordinal)") {
+    val row = InternalRow.apply(new GenericArrayData(Array(1L)))
+    val unsafeRow = UnsafeProjection.create(Array[DataType](ArrayType(LongType))).apply(row)
+    // Makes sure hashCode on unsafe array won't crash
+    unsafeRow.getArray(0).hashCode()
+  }
 }

From be7c5ff1ad02ce1c03113c98656a4e0c0c3cee83 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Mon, 5 Oct 2015 19:23:41 -0700
Subject: [PATCH 144/896] [SPARK-10900] [STREAMING] Add output operation events
 to StreamingListener

Add output operation events to StreamingListener so as to implement the following UI features:

1. Progress bar of a batch in the batch list.
2. Be able to display output operation `description` and `duration` when there is no spark job in a Streaming job.

Author: zsxwing <zsxwing@gmail.com>

Closes #8958 from zsxwing/output-operation-events.
---
 .../apache/spark/streaming/DStreamGraph.scala |  6 ++-
 .../spark/streaming/scheduler/Job.scala       |  7 +++
 .../streaming/scheduler/JobScheduler.scala    | 20 +++++----
 .../scheduler/OutputOperationInfo.scala       | 44 +++++++++++++++++++
 .../scheduler/StreamingListener.scala         | 16 +++++++
 .../scheduler/StreamingListenerBus.scala      |  4 ++
 .../streaming/StreamingListenerSuite.scala    | 37 ++++++++++++++++
 7 files changed, 125 insertions(+), 9 deletions(-)
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
index ebbcb6b77851..de79c9ef1abf 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
@@ -111,7 +111,11 @@ final private[streaming] class DStreamGraph extends Serializable with Logging {
   def generateJobs(time: Time): Seq[Job] = {
     logDebug("Generating jobs for time " + time)
     val jobs = this.synchronized {
-      outputStreams.flatMap(outputStream => outputStream.generateJob(time))
+      outputStreams.flatMap { outputStream =>
+        val jobOption = outputStream.generateJob(time)
+        jobOption.foreach(_.setCallSite(outputStream.creationSite.longForm))
+        jobOption
+      }
     }
     logDebug("Generated " + jobs.length + " jobs for time " + time)
     jobs
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
index 3c481bf3491f..1373053f064f 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
@@ -29,6 +29,7 @@ class Job(val time: Time, func: () => _) {
   private var _outputOpId: Int = _
   private var isSet = false
   private var _result: Try[_] = null
+  private var _callSite: String = "Unknown"
 
   def run() {
     _result = Try(func())
@@ -70,5 +71,11 @@ class Job(val time: Time, func: () => _) {
     _outputOpId = outputOpId
   }
 
+  def setCallSite(callSite: String): Unit = {
+    _callSite = callSite
+  }
+
+  def callSite: String = _callSite
+
   override def toString: String = id
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
index 66afbf1b1176..0a4a396a0f49 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
@@ -30,8 +30,8 @@ import org.apache.spark.util.{EventLoop, ThreadUtils}
 
 
 private[scheduler] sealed trait JobSchedulerEvent
-private[scheduler] case class JobStarted(job: Job) extends JobSchedulerEvent
-private[scheduler] case class JobCompleted(job: Job) extends JobSchedulerEvent
+private[scheduler] case class JobStarted(job: Job, startTime: Long) extends JobSchedulerEvent
+private[scheduler] case class JobCompleted(job: Job, completedTime: Long) extends JobSchedulerEvent
 private[scheduler] case class ErrorReported(msg: String, e: Throwable) extends JobSchedulerEvent
 
 /**
@@ -143,8 +143,8 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
   private def processEvent(event: JobSchedulerEvent) {
     try {
       event match {
-        case JobStarted(job) => handleJobStart(job)
-        case JobCompleted(job) => handleJobCompletion(job)
+        case JobStarted(job, startTime) => handleJobStart(job, startTime)
+        case JobCompleted(job, completedTime) => handleJobCompletion(job, completedTime)
         case ErrorReported(m, e) => handleError(m, e)
       }
     } catch {
@@ -153,7 +153,7 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
     }
   }
 
-  private def handleJobStart(job: Job) {
+  private def handleJobStart(job: Job, startTime: Long) {
     val jobSet = jobSets.get(job.time)
     val isFirstJobOfJobSet = !jobSet.hasStarted
     jobSet.handleJobStart(job)
@@ -162,12 +162,16 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
       // correct "jobSet.processingStartTime".
       listenerBus.post(StreamingListenerBatchStarted(jobSet.toBatchInfo))
     }
+    listenerBus.post(StreamingListenerOutputOperationStarted(
+      OutputOperationInfo(job.time, job.outputOpId, job.callSite, Some(startTime), None)))
     logInfo("Starting job " + job.id + " from job set of time " + jobSet.time)
   }
 
-  private def handleJobCompletion(job: Job) {
+  private def handleJobCompletion(job: Job, completedTime: Long) {
     val jobSet = jobSets.get(job.time)
     jobSet.handleJobCompletion(job)
+    listenerBus.post(StreamingListenerOutputOperationCompleted(
+      OutputOperationInfo(job.time, job.outputOpId, job.callSite, None, Some(completedTime))))
     logInfo("Finished job " + job.id + " from job set of time " + jobSet.time)
     if (jobSet.hasCompleted) {
       jobSets.remove(jobSet.time)
@@ -210,7 +214,7 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
         // it's possible that when `post` is called, `eventLoop` happens to null.
         var _eventLoop = eventLoop
         if (_eventLoop != null) {
-          _eventLoop.post(JobStarted(job))
+          _eventLoop.post(JobStarted(job, clock.getTimeMillis()))
           // Disable checks for existing output directories in jobs launched by the streaming
           // scheduler, since we may need to write output to an existing directory during checkpoint
           // recovery; see SPARK-4835 for more details.
@@ -219,7 +223,7 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
           }
           _eventLoop = eventLoop
           if (_eventLoop != null) {
-            _eventLoop.post(JobCompleted(job))
+            _eventLoop.post(JobCompleted(job, clock.getTimeMillis()))
           }
         } else {
           // JobScheduler has been stopped.
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala
new file mode 100644
index 000000000000..d5614b343912
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.scheduler
+
+import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.streaming.Time
+
+/**
+ * :: DeveloperApi ::
+ * Class having information on output operations.
+ * @param batchTime Time of the batch
+ * @param id Id of this output operation. Different output operations have different ids in a batch.
+ * @param description The description of this output operation.
+ * @param startTime Clock time of when the output operation started processing
+ * @param endTime Clock time of when the output operation started processing
+ */
+@DeveloperApi
+case class OutputOperationInfo(
+    batchTime: Time,
+    id: Int,
+    description: String,
+    startTime: Option[Long],
+    endTime: Option[Long]) {
+
+  /**
+   * Return the duration of this output operation.
+   */
+  def duration: Option[Long] = for (s <- startTime; e <- endTime) yield e - s
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala
index 74dbba453f02..d19bdbb443c5 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListener.scala
@@ -38,6 +38,14 @@ case class StreamingListenerBatchCompleted(batchInfo: BatchInfo) extends Streami
 @DeveloperApi
 case class StreamingListenerBatchStarted(batchInfo: BatchInfo) extends StreamingListenerEvent
 
+@DeveloperApi
+case class StreamingListenerOutputOperationStarted(outputOperationInfo: OutputOperationInfo)
+  extends StreamingListenerEvent
+
+@DeveloperApi
+case class StreamingListenerOutputOperationCompleted(outputOperationInfo: OutputOperationInfo)
+  extends StreamingListenerEvent
+
 @DeveloperApi
 case class StreamingListenerReceiverStarted(receiverInfo: ReceiverInfo)
   extends StreamingListenerEvent
@@ -75,6 +83,14 @@ trait StreamingListener {
 
   /** Called when processing of a batch of jobs has completed. */
   def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted) { }
+
+  /** Called when processing of a job of a batch has started. */
+  def onOutputOperationStarted(
+      outputOperationStarted: StreamingListenerOutputOperationStarted) { }
+
+  /** Called when processing of a job of a batch has completed. */
+  def onOutputOperationCompleted(
+      outputOperationCompleted: StreamingListenerOutputOperationCompleted) { }
 }
 
 
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListenerBus.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListenerBus.scala
index b07d6cf347ca..ca111bb636ed 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListenerBus.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/StreamingListenerBus.scala
@@ -43,6 +43,10 @@ private[spark] class StreamingListenerBus
         listener.onBatchStarted(batchStarted)
       case batchCompleted: StreamingListenerBatchCompleted =>
         listener.onBatchCompleted(batchCompleted)
+      case outputOperationStarted: StreamingListenerOutputOperationStarted =>
+        listener.onOutputOperationStarted(outputOperationStarted)
+      case outputOperationCompleted: StreamingListenerOutputOperationCompleted =>
+        listener.onOutputOperationCompleted(outputOperationCompleted)
       case _ =>
     }
   }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
index d8fd2ced3bf3..2b43b7467042 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
@@ -140,6 +140,27 @@ class StreamingListenerSuite extends TestSuiteBase with Matchers {
     }
   }
 
+  test("output operation reporting") {
+    ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
+    val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
+    inputStream.foreachRDD(_.count())
+    inputStream.foreachRDD(_.collect())
+    inputStream.foreachRDD(_.count())
+
+    val collector = new OutputOperationInfoCollector
+    ssc.addStreamingListener(collector)
+
+    ssc.start()
+    try {
+      eventually(timeout(30 seconds), interval(20 millis)) {
+        collector.startedOutputOperationIds.take(3) should be (Seq(0, 1, 2))
+        collector.completedOutputOperationIds.take(3) should be (Seq(0, 1, 2))
+      }
+    } finally {
+      ssc.stop()
+    }
+  }
+
   test("onBatchCompleted with successful batch") {
     ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
     val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
@@ -254,6 +275,22 @@ class ReceiverInfoCollector extends StreamingListener {
   }
 }
 
+/** Listener that collects information on processed output operations */
+class OutputOperationInfoCollector extends StreamingListener {
+  val startedOutputOperationIds = new ArrayBuffer[Int] with SynchronizedBuffer[Int]
+  val completedOutputOperationIds = new ArrayBuffer[Int] with SynchronizedBuffer[Int]
+
+  override def onOutputOperationStarted(
+      outputOperationStarted: StreamingListenerOutputOperationStarted): Unit = {
+    startedOutputOperationIds += outputOperationStarted.outputOperationInfo.id
+  }
+
+  override def onOutputOperationCompleted(
+      outputOperationCompleted: StreamingListenerOutputOperationCompleted): Unit = {
+    completedOutputOperationIds += outputOperationCompleted.outputOperationInfo.id
+  }
+}
+
 class StreamingListenerSuiteReceiver extends Receiver[Any](StorageLevel.MEMORY_ONLY) with Logging {
   def onStart() {
     Future {

From 4e0027feaee7c028741da88d8fbc26a45fc4a268 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Mon, 5 Oct 2015 23:24:12 -0700
Subject: [PATCH 145/896] [SPARK-10585] [SQL] [FOLLOW-UP] remove
 no-longer-necessary code for unsafe generation

These code was left there to produce clear diff for https://github.com/apache/spark/pull/8747

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8991 from cloud-fan/clean.
---
 .../expressions/UnsafeRowWriters.java         | 264 -------------
 .../catalyst/expressions/UnsafeWriters.java   | 193 ----------
 .../codegen/GenerateUnsafeProjection.scala    | 351 ------------------
 3 files changed, 808 deletions(-)
 delete mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
 delete mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
deleted file mode 100644
index 0f1e0202aace..000000000000
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRowWriters.java
+++ /dev/null
@@ -1,264 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.expressions;
-
-import java.math.BigInteger;
-
-import org.apache.spark.sql.catalyst.InternalRow;
-import org.apache.spark.sql.types.Decimal;
-import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.array.ByteArrayMethods;
-import org.apache.spark.unsafe.types.ByteArray;
-import org.apache.spark.unsafe.types.CalendarInterval;
-import org.apache.spark.unsafe.types.UTF8String;
-
-/**
- * A set of helper methods to write data into {@link UnsafeRow}s,
- * used by {@link org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection}.
- */
-public class UnsafeRowWriters {
-
-  /** Writer for Decimal with precision under 18. */
-  public static class CompactDecimalWriter {
-
-    public static int getSize(Decimal input) {
-      return 0;
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, Decimal input) {
-      target.setLong(ordinal, input.toUnscaledLong());
-      return 0;
-    }
-  }
-
-  /** Writer for Decimal with precision larger than 18. */
-  public static class DecimalWriter {
-    private static final int SIZE = 16;
-    public static int getSize(Decimal input) {
-      // bounded size
-      return SIZE;
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, Decimal input) {
-      final Object base = target.getBaseObject();
-      final long offset = target.getBaseOffset() + cursor;
-      // zero-out the bytes
-      Platform.putLong(base, offset, 0L);
-      Platform.putLong(base, offset + 8, 0L);
-
-      if (input == null) {
-        target.setNullAt(ordinal);
-        // keep the offset and length for update
-        int fieldOffset = UnsafeRow.calculateBitSetWidthInBytes(target.numFields()) + ordinal * 8;
-        Platform.putLong(base, target.getBaseOffset() + fieldOffset,
-          ((long) cursor) << 32);
-        return SIZE;
-      }
-
-      final BigInteger integer = input.toJavaBigDecimal().unscaledValue();
-      byte[] bytes = integer.toByteArray();
-
-      // Write the bytes to the variable length portion.
-      Platform.copyMemory(
-        bytes, Platform.BYTE_ARRAY_OFFSET, base, target.getBaseOffset() + cursor, bytes.length);
-      // Set the fixed length portion.
-      target.setLong(ordinal, (((long) cursor) << 32) | (long) bytes.length);
-
-      return SIZE;
-    }
-  }
-
-  /** Writer for UTF8String. */
-  public static class UTF8StringWriter {
-
-    public static int getSize(UTF8String input) {
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(input.numBytes());
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, UTF8String input) {
-      final long offset = target.getBaseOffset() + cursor;
-      final int numBytes = input.numBytes();
-
-      // zero-out the padding bytes
-      if ((numBytes & 0x07) > 0) {
-        Platform.putLong(target.getBaseObject(), offset + ((numBytes >> 3) << 3), 0L);
-      }
-
-      // Write the bytes to the variable length portion.
-      input.writeToMemory(target.getBaseObject(), offset);
-
-      // Set the fixed length portion.
-      target.setLong(ordinal, (((long) cursor) << 32) | ((long) numBytes));
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-  }
-
-  /** Writer for binary (byte array) type. */
-  public static class BinaryWriter {
-
-    public static int getSize(byte[] input) {
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(input.length);
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, byte[] input) {
-      final long offset = target.getBaseOffset() + cursor;
-      final int numBytes = input.length;
-
-      // zero-out the padding bytes
-      if ((numBytes & 0x07) > 0) {
-        Platform.putLong(target.getBaseObject(), offset + ((numBytes >> 3) << 3), 0L);
-      }
-
-      // Write the bytes to the variable length portion.
-      ByteArray.writeToMemory(input, target.getBaseObject(), offset);
-
-      // Set the fixed length portion.
-      target.setLong(ordinal, (((long) cursor) << 32) | ((long) numBytes));
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-  }
-
-  /**
-   * Writer for struct type where the struct field is backed by an {@link UnsafeRow}.
-   *
-   * We throw UnsupportedOperationException for inputs that are not backed by {@link UnsafeRow}.
-   * Non-UnsafeRow struct fields are handled directly in
-   * {@link org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection}
-   * by generating the Java code needed to convert them into UnsafeRow.
-   */
-  public static class StructWriter {
-    public static int getSize(InternalRow input) {
-      int numBytes = 0;
-      if (input instanceof UnsafeRow) {
-        numBytes = ((UnsafeRow) input).getSizeInBytes();
-      } else {
-        // This is handled directly in GenerateUnsafeProjection.
-        throw new UnsupportedOperationException();
-      }
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, InternalRow input) {
-      int numBytes = 0;
-      final long offset = target.getBaseOffset() + cursor;
-      if (input instanceof UnsafeRow) {
-        final UnsafeRow row = (UnsafeRow) input;
-        numBytes = row.getSizeInBytes();
-
-        // zero-out the padding bytes
-        if ((numBytes & 0x07) > 0) {
-          Platform.putLong(target.getBaseObject(), offset + ((numBytes >> 3) << 3), 0L);
-        }
-
-        // Write the bytes to the variable length portion.
-        row.writeToMemory(target.getBaseObject(), offset);
-
-        // Set the fixed length portion.
-        target.setLong(ordinal, (((long) cursor) << 32) | ((long) numBytes));
-      } else {
-        // This is handled directly in GenerateUnsafeProjection.
-        throw new UnsupportedOperationException();
-      }
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-  }
-
-  /** Writer for interval type. */
-  public static class IntervalWriter {
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, CalendarInterval input) {
-      final long offset = target.getBaseOffset() + cursor;
-
-      // Write the months and microseconds fields of Interval to the variable length portion.
-      Platform.putLong(target.getBaseObject(), offset, input.months);
-      Platform.putLong(target.getBaseObject(), offset + 8, input.microseconds);
-
-      // Set the fixed length portion.
-      target.setLong(ordinal, ((long) cursor) << 32);
-      return 16;
-    }
-  }
-
-  public static class ArrayWriter {
-
-    public static int getSize(UnsafeArrayData input) {
-      // we need extra 4 bytes the store the number of elements in this array.
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(input.getSizeInBytes() + 4);
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, UnsafeArrayData input) {
-      final int numBytes = input.getSizeInBytes() + 4;
-      final long offset = target.getBaseOffset() + cursor;
-
-      // write the number of elements into first 4 bytes.
-      Platform.putInt(target.getBaseObject(), offset, input.numElements());
-
-      // zero-out the padding bytes
-      if ((numBytes & 0x07) > 0) {
-        Platform.putLong(target.getBaseObject(), offset + ((numBytes >> 3) << 3), 0L);
-      }
-
-      // Write the bytes to the variable length portion.
-      input.writeToMemory(target.getBaseObject(), offset + 4);
-
-      // Set the fixed length portion.
-      target.setLong(ordinal, (((long) cursor) << 32) | ((long) numBytes));
-
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-  }
-
-  public static class MapWriter {
-
-    public static int getSize(UnsafeMapData input) {
-      // we need extra 8 bytes to store number of elements and numBytes of key array.
-      final int sizeInBytes = 4 + 4 + input.getSizeInBytes();
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(sizeInBytes);
-    }
-
-    public static int write(UnsafeRow target, int ordinal, int cursor, UnsafeMapData input) {
-      final long offset = target.getBaseOffset() + cursor;
-      final UnsafeArrayData keyArray = input.keyArray();
-      final UnsafeArrayData valueArray = input.valueArray();
-      final int keysNumBytes = keyArray.getSizeInBytes();
-      final int valuesNumBytes = valueArray.getSizeInBytes();
-      final int numBytes = 4 + 4 + keysNumBytes + valuesNumBytes;
-
-      // write the number of elements into first 4 bytes.
-      Platform.putInt(target.getBaseObject(), offset, input.numElements());
-      // write the numBytes of key array into second 4 bytes.
-      Platform.putInt(target.getBaseObject(), offset + 4, keysNumBytes);
-
-      // zero-out the padding bytes
-      if ((numBytes & 0x07) > 0) {
-        Platform.putLong(target.getBaseObject(), offset + ((numBytes >> 3) << 3), 0L);
-      }
-
-      // Write the bytes of key array to the variable length portion.
-      keyArray.writeToMemory(target.getBaseObject(), offset + 8);
-
-      // Write the bytes of value array to the variable length portion.
-      valueArray.writeToMemory(target.getBaseObject(), offset + 8 + keysNumBytes);
-
-      // Set the fixed length portion.
-      target.setLong(ordinal, (((long) cursor) << 32) | ((long) numBytes));
-
-      return ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
-    }
-  }
-}
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java
deleted file mode 100644
index ce2d9c4ffbf9..000000000000
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeWriters.java
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.expressions;
-
-import org.apache.spark.sql.types.Decimal;
-import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.types.CalendarInterval;
-import org.apache.spark.unsafe.types.UTF8String;
-
-/**
- * A set of helper methods to write data into the variable length portion.
- */
-public class UnsafeWriters {
-  public static void writeToMemory(
-      Object inputObject,
-      long inputOffset,
-      Object targetObject,
-      long targetOffset,
-      int numBytes) {
-
-    // zero-out the padding bytes
-//    if ((numBytes & 0x07) > 0) {
-//      Platform.putLong(targetObject, targetOffset + ((numBytes >> 3) << 3), 0L);
-//    }
-
-    // Write the UnsafeData to the target memory.
-    Platform.copyMemory(inputObject, inputOffset, targetObject, targetOffset, numBytes);
-  }
-
-  public static int getRoundedSize(int size) {
-    //return ByteArrayMethods.roundNumberOfBytesToNearestWord(size);
-    // todo: do word alignment
-    return size;
-  }
-
-  /** Writer for Decimal with precision larger than 18. */
-  public static class DecimalWriter {
-
-    public static int getSize(Decimal input) {
-      return 16;
-    }
-
-    public static int write(Object targetObject, long targetOffset, Decimal input) {
-      final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
-      final int numBytes = bytes.length;
-      assert(numBytes <= 16);
-
-      // zero-out the bytes
-      Platform.putLong(targetObject, targetOffset, 0L);
-      Platform.putLong(targetObject, targetOffset + 8, 0L);
-
-      // Write the bytes to the variable length portion.
-      Platform.copyMemory(bytes, Platform.BYTE_ARRAY_OFFSET, targetObject, targetOffset, numBytes);
-      return 16;
-    }
-  }
-
-  /** Writer for UTF8String. */
-  public static class UTF8StringWriter {
-
-    public static int getSize(UTF8String input) {
-      return getRoundedSize(input.numBytes());
-    }
-
-    public static int write(Object targetObject, long targetOffset, UTF8String input) {
-      final int numBytes = input.numBytes();
-
-      // Write the bytes to the variable length portion.
-      writeToMemory(input.getBaseObject(), input.getBaseOffset(),
-        targetObject, targetOffset, numBytes);
-
-      return getRoundedSize(numBytes);
-    }
-  }
-
-  /** Writer for binary (byte array) type. */
-  public static class BinaryWriter {
-
-    public static int getSize(byte[] input) {
-      return getRoundedSize(input.length);
-    }
-
-    public static int write(Object targetObject, long targetOffset, byte[] input) {
-      final int numBytes = input.length;
-
-      // Write the bytes to the variable length portion.
-      writeToMemory(input, Platform.BYTE_ARRAY_OFFSET, targetObject, targetOffset, numBytes);
-
-      return getRoundedSize(numBytes);
-    }
-  }
-
-  /** Writer for UnsafeRow. */
-  public static class StructWriter {
-
-    public static int getSize(UnsafeRow input) {
-      return getRoundedSize(input.getSizeInBytes());
-    }
-
-    public static int write(Object targetObject, long targetOffset, UnsafeRow input) {
-      final int numBytes = input.getSizeInBytes();
-
-      // Write the bytes to the variable length portion.
-      writeToMemory(input.getBaseObject(), input.getBaseOffset(),
-        targetObject, targetOffset, numBytes);
-
-      return getRoundedSize(numBytes);
-    }
-  }
-
-  /** Writer for interval type. */
-  public static class IntervalWriter {
-
-    public static int getSize(UnsafeRow input) {
-      return 16;
-    }
-
-    public static int write(Object targetObject, long targetOffset, CalendarInterval input) {
-      // Write the months and microseconds fields of Interval to the variable length portion.
-      Platform.putLong(targetObject, targetOffset, input.months);
-      Platform.putLong(targetObject, targetOffset + 8, input.microseconds);
-      return 16;
-    }
-  }
-
-  /** Writer for UnsafeArrayData. */
-  public static class ArrayWriter {
-
-    public static int getSize(UnsafeArrayData input) {
-      // we need extra 4 bytes the store the number of elements in this array.
-      return getRoundedSize(input.getSizeInBytes() + 4);
-    }
-
-    public static int write(Object targetObject, long targetOffset, UnsafeArrayData input) {
-      final int numBytes = input.getSizeInBytes();
-
-      // write the number of elements into first 4 bytes.
-      Platform.putInt(targetObject, targetOffset, input.numElements());
-
-      // Write the bytes to the variable length portion.
-      writeToMemory(
-        input.getBaseObject(), input.getBaseOffset(), targetObject, targetOffset + 4, numBytes);
-
-      return getRoundedSize(numBytes + 4);
-    }
-  }
-
-  public static class MapWriter {
-
-    public static int getSize(UnsafeMapData input) {
-      // we need extra 8 bytes to store number of elements and numBytes of key array.
-      return getRoundedSize(4 + 4 + input.getSizeInBytes());
-    }
-
-    public static int write(Object targetObject, long targetOffset, UnsafeMapData input) {
-      final UnsafeArrayData keyArray = input.keyArray();
-      final UnsafeArrayData valueArray = input.valueArray();
-      final int keysNumBytes = keyArray.getSizeInBytes();
-      final int valuesNumBytes = valueArray.getSizeInBytes();
-      final int numBytes = 4 + 4 + keysNumBytes + valuesNumBytes;
-
-      // write the number of elements into first 4 bytes.
-      Platform.putInt(targetObject, targetOffset, input.numElements());
-      // write the numBytes of key array into second 4 bytes.
-      Platform.putInt(targetObject, targetOffset + 4, keysNumBytes);
-
-      // Write the bytes of key array to the variable length portion.
-      writeToMemory(keyArray.getBaseObject(), keyArray.getBaseOffset(),
-        targetObject, targetOffset + 8, keysNumBytes);
-
-      // Write the bytes of value array to the variable length portion.
-      writeToMemory(valueArray.getBaseObject(), valueArray.getBaseOffset(),
-        targetObject, targetOffset + 8 + keysNumBytes, valuesNumBytes);
-
-      return getRoundedSize(numBytes);
-    }
-  }
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 99bf50a84571..8e58cb9ad1e5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -31,15 +31,6 @@ import org.apache.spark.sql.types._
  */
 object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafeProjection] {
 
-  private val StringWriter = classOf[UnsafeRowWriters.UTF8StringWriter].getName
-  private val BinaryWriter = classOf[UnsafeRowWriters.BinaryWriter].getName
-  private val IntervalWriter = classOf[UnsafeRowWriters.IntervalWriter].getName
-  private val StructWriter = classOf[UnsafeRowWriters.StructWriter].getName
-  private val CompactDecimalWriter = classOf[UnsafeRowWriters.CompactDecimalWriter].getName
-  private val DecimalWriter = classOf[UnsafeRowWriters.DecimalWriter].getName
-  private val ArrayWriter = classOf[UnsafeRowWriters.ArrayWriter].getName
-  private val MapWriter = classOf[UnsafeRowWriters.MapWriter].getName
-
   /** Returns true iff we support this data type. */
   def canSupport(dataType: DataType): Boolean = dataType match {
     case NullType => true
@@ -51,348 +42,6 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     case _ => false
   }
 
-  def genAdditionalSize(dt: DataType, ev: GeneratedExpressionCode): String = dt match {
-    case t: DecimalType if t.precision > Decimal.MAX_LONG_DIGITS =>
-      s"$DecimalWriter.getSize(${ev.primitive})"
-    case StringType =>
-      s"${ev.isNull} ? 0 : $StringWriter.getSize(${ev.primitive})"
-    case BinaryType =>
-      s"${ev.isNull} ? 0 : $BinaryWriter.getSize(${ev.primitive})"
-    case CalendarIntervalType =>
-      s"${ev.isNull} ? 0 : 16"
-    case _: StructType =>
-      s"${ev.isNull} ? 0 : $StructWriter.getSize(${ev.primitive})"
-    case _: ArrayType =>
-      s"${ev.isNull} ? 0 : $ArrayWriter.getSize(${ev.primitive})"
-    case _: MapType =>
-      s"${ev.isNull} ? 0 : $MapWriter.getSize(${ev.primitive})"
-    case _ => ""
-  }
-
-  def genFieldWriter(
-      ctx: CodeGenContext,
-      fieldType: DataType,
-      ev: GeneratedExpressionCode,
-      target: String,
-      index: Int,
-      cursor: String): String = fieldType match {
-    case _ if ctx.isPrimitiveType(fieldType) =>
-      s"${ctx.setColumn(target, fieldType, index, ev.primitive)}"
-    case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
-      s"""
-       // make sure Decimal object has the same scale as DecimalType
-       if (${ev.primitive}.changePrecision(${t.precision}, ${t.scale})) {
-         $CompactDecimalWriter.write($target, $index, $cursor, ${ev.primitive});
-       } else {
-         $target.setNullAt($index);
-       }
-       """
-    case t: DecimalType if t.precision > Decimal.MAX_LONG_DIGITS =>
-      s"""
-       // make sure Decimal object has the same scale as DecimalType
-       if (${ev.primitive}.changePrecision(${t.precision}, ${t.scale})) {
-         $cursor += $DecimalWriter.write($target, $index, $cursor, ${ev.primitive});
-       } else {
-         $cursor += $DecimalWriter.write($target, $index, $cursor, null);
-       }
-       """
-    case StringType =>
-      s"$cursor += $StringWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case BinaryType =>
-      s"$cursor += $BinaryWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case CalendarIntervalType =>
-      s"$cursor += $IntervalWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case _: StructType =>
-      s"$cursor += $StructWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case _: ArrayType =>
-      s"$cursor += $ArrayWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case _: MapType =>
-      s"$cursor += $MapWriter.write($target, $index, $cursor, ${ev.primitive})"
-    case NullType => ""
-    case _ =>
-      throw new UnsupportedOperationException(s"Not supported DataType: $fieldType")
-  }
-
-  /**
-   * Generates the Java code to convert a struct (backed by InternalRow) to UnsafeRow.
-   *
-   * @param ctx code generation context
-   * @param inputs could be the codes for expressions or input struct fields.
-   * @param inputTypes types of the inputs
-   */
-  private def createCodeForStruct(
-      ctx: CodeGenContext,
-      row: String,
-      inputs: Seq[GeneratedExpressionCode],
-      inputTypes: Seq[DataType]): GeneratedExpressionCode = {
-
-    val fixedSize = 8 * inputTypes.length + UnsafeRow.calculateBitSetWidthInBytes(inputTypes.length)
-
-    val output = ctx.freshName("convertedStruct")
-    ctx.addMutableState("UnsafeRow", output, s"this.$output = new UnsafeRow();")
-    val buffer = ctx.freshName("buffer")
-    ctx.addMutableState("byte[]", buffer, s"this.$buffer = new byte[$fixedSize];")
-    val cursor = ctx.freshName("cursor")
-    ctx.addMutableState("int", cursor, s"this.$cursor = 0;")
-    val tmpBuffer = ctx.freshName("tmpBuffer")
-
-    val convertedFields = inputTypes.zip(inputs).zipWithIndex.map { case ((dt, input), i) =>
-      val ev = createConvertCode(ctx, input, dt)
-      val growBuffer = if (!UnsafeRow.isFixedLength(dt)) {
-        val numBytes = ctx.freshName("numBytes")
-        s"""
-          int $numBytes = $cursor + (${genAdditionalSize(dt, ev)});
-          if ($buffer.length < $numBytes) {
-            // This will not happen frequently, because the buffer is re-used.
-            byte[] $tmpBuffer = new byte[$numBytes * 2];
-            Platform.copyMemory($buffer, Platform.BYTE_ARRAY_OFFSET,
-              $tmpBuffer, Platform.BYTE_ARRAY_OFFSET, $buffer.length);
-            $buffer = $tmpBuffer;
-          }
-          $output.pointTo($buffer, Platform.BYTE_ARRAY_OFFSET, ${inputTypes.length}, $numBytes);
-         """
-      } else {
-        ""
-      }
-      val update = dt match {
-        case dt: DecimalType if dt.precision > Decimal.MAX_LONG_DIGITS =>
-          // Can't call setNullAt() for DecimalType
-          s"""
-          if (${ev.isNull}) {
-            $cursor += $DecimalWriter.write($output, $i, $cursor, null);
-          } else {
-            ${genFieldWriter(ctx, dt, ev, output, i, cursor)};
-          }
-        """
-        case _ =>
-          s"""
-          if (${ev.isNull}) {
-            $output.setNullAt($i);
-          } else {
-            ${genFieldWriter(ctx, dt, ev, output, i, cursor)};
-          }
-        """
-      }
-      s"""
-        ${ev.code}
-        $growBuffer
-        $update
-      """
-    }
-
-    val code = s"""
-      $cursor = $fixedSize;
-      $output.pointTo($buffer, Platform.BYTE_ARRAY_OFFSET, ${inputTypes.length}, $cursor);
-      ${ctx.splitExpressions(row, convertedFields)}
-      """
-    GeneratedExpressionCode(code, "false", output)
-  }
-
-  private def getWriter(dt: DataType) = dt match {
-    case StringType => classOf[UnsafeWriters.UTF8StringWriter].getName
-    case BinaryType => classOf[UnsafeWriters.BinaryWriter].getName
-    case CalendarIntervalType => classOf[UnsafeWriters.IntervalWriter].getName
-    case _: StructType => classOf[UnsafeWriters.StructWriter].getName
-    case _: ArrayType => classOf[UnsafeWriters.ArrayWriter].getName
-    case _: MapType => classOf[UnsafeWriters.MapWriter].getName
-    case _: DecimalType => classOf[UnsafeWriters.DecimalWriter].getName
-  }
-
-  private def createCodeForArray(
-      ctx: CodeGenContext,
-      input: GeneratedExpressionCode,
-      elementType: DataType): GeneratedExpressionCode = {
-    val output = ctx.freshName("convertedArray")
-    ctx.addMutableState("UnsafeArrayData", output, s"$output = new UnsafeArrayData();")
-    val buffer = ctx.freshName("buffer")
-    ctx.addMutableState("byte[]", buffer, s"$buffer = new byte[64];")
-    val tmpBuffer = ctx.freshName("tmpBuffer")
-    val outputIsNull = ctx.freshName("isNull")
-    val numElements = ctx.freshName("numElements")
-    val fixedSize = ctx.freshName("fixedSize")
-    val numBytes = ctx.freshName("numBytes")
-    val cursor = ctx.freshName("cursor")
-    val index = ctx.freshName("index")
-    val elementName = ctx.freshName("elementName")
-
-    val element = {
-      val code = s"${ctx.javaType(elementType)} $elementName = " +
-        s"${ctx.getValue(input.primitive, elementType, index)};"
-      val isNull = s"${input.primitive}.isNullAt($index)"
-      GeneratedExpressionCode(code, isNull, elementName)
-    }
-
-    val convertedElement = createConvertCode(ctx, element, elementType)
-
-    val writeElement = elementType match {
-      case _ if ctx.isPrimitiveType(elementType) =>
-        // Should we do word align?
-        val elementSize = elementType.defaultSize
-        s"""
-          Platform.put${ctx.primitiveTypeName(elementType)}(
-            $buffer,
-            Platform.BYTE_ARRAY_OFFSET + $cursor,
-            ${convertedElement.primitive});
-          $cursor += $elementSize;
-        """
-      case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
-        s"""
-          Platform.putLong(
-            $buffer,
-            Platform.BYTE_ARRAY_OFFSET + $cursor,
-            ${convertedElement.primitive}.toUnscaledLong());
-          $cursor += 8;
-        """
-      case _ =>
-        val writer = getWriter(elementType)
-        s"""
-          $cursor += $writer.write(
-            $buffer,
-            Platform.BYTE_ARRAY_OFFSET + $cursor,
-            ${convertedElement.primitive});
-        """
-    }
-
-    val checkNull = convertedElement.isNull + (elementType match {
-      case t: DecimalType =>
-        s" || !${convertedElement.primitive}.changePrecision(${t.precision}, ${t.scale})"
-      case _ => ""
-    })
-
-    val elementSize = elementType match {
-      // Should we do word align for primitive types?
-      case _ if ctx.isPrimitiveType(elementType) => elementType.defaultSize.toString
-      case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS => "8"
-      case _ =>
-        val writer = getWriter(elementType)
-        s"$writer.getSize(${convertedElement.primitive})"
-    }
-
-    val code = s"""
-      ${input.code}
-      final boolean $outputIsNull = ${input.isNull};
-      if (!$outputIsNull) {
-        if (${input.primitive} instanceof UnsafeArrayData) {
-          $output = (UnsafeArrayData) ${input.primitive};
-        } else {
-          final int $numElements = ${input.primitive}.numElements();
-          final int $fixedSize = 4 * $numElements;
-          int $numBytes = $fixedSize;
-
-          int $cursor = $fixedSize;
-          for (int $index = 0; $index < $numElements; $index++) {
-            ${convertedElement.code}
-            if ($checkNull) {
-              // If element is null, write the negative value address into offset region.
-              Platform.putInt($buffer, Platform.BYTE_ARRAY_OFFSET + 4 * $index, -$cursor);
-            } else {
-              $numBytes += $elementSize;
-              if ($buffer.length < $numBytes) {
-                // This will not happen frequently, because the buffer is re-used.
-                byte[] $tmpBuffer = new byte[$numBytes * 2];
-                Platform.copyMemory($buffer, Platform.BYTE_ARRAY_OFFSET,
-                  $tmpBuffer, Platform.BYTE_ARRAY_OFFSET, $buffer.length);
-                $buffer = $tmpBuffer;
-              }
-              Platform.putInt($buffer, Platform.BYTE_ARRAY_OFFSET + 4 * $index, $cursor);
-              $writeElement
-            }
-          }
-
-          $output.pointTo(
-            $buffer,
-            Platform.BYTE_ARRAY_OFFSET,
-            $numElements,
-            $numBytes);
-        }
-      }
-      """
-    GeneratedExpressionCode(code, outputIsNull, output)
-  }
-
-  private def createCodeForMap(
-      ctx: CodeGenContext,
-      input: GeneratedExpressionCode,
-      keyType: DataType,
-      valueType: DataType): GeneratedExpressionCode = {
-    val output = ctx.freshName("convertedMap")
-    val outputIsNull = ctx.freshName("isNull")
-    val keyArrayName = ctx.freshName("keyArrayName")
-    val valueArrayName = ctx.freshName("valueArrayName")
-
-    val keyArray = {
-      val code = s"ArrayData $keyArrayName = ${input.primitive}.keyArray();"
-      val isNull = "false"
-      GeneratedExpressionCode(code, isNull, keyArrayName)
-    }
-
-    val valueArray = {
-      val code = s"ArrayData $valueArrayName = ${input.primitive}.valueArray();"
-      val isNull = "false"
-      GeneratedExpressionCode(code, isNull, valueArrayName)
-    }
-
-    val convertedKeys = createCodeForArray(ctx, keyArray, keyType)
-    val convertedValues = createCodeForArray(ctx, valueArray, valueType)
-
-    val code = s"""
-      ${input.code}
-      final boolean $outputIsNull = ${input.isNull};
-      UnsafeMapData $output = null;
-      if (!$outputIsNull) {
-        if (${input.primitive} instanceof UnsafeMapData) {
-          $output = (UnsafeMapData) ${input.primitive};
-        } else {
-          ${convertedKeys.code}
-          ${convertedValues.code}
-          $output = new UnsafeMapData(${convertedKeys.primitive}, ${convertedValues.primitive});
-        }
-      }
-      """
-    GeneratedExpressionCode(code, outputIsNull, output)
-  }
-
-  /**
-   * Generates the java code to convert a data to its unsafe version.
-   */
-  private def createConvertCode(
-      ctx: CodeGenContext,
-      input: GeneratedExpressionCode,
-      dataType: DataType): GeneratedExpressionCode = dataType match {
-    case t: StructType =>
-      val output = ctx.freshName("convertedStruct")
-      val outputIsNull = ctx.freshName("isNull")
-      val fieldTypes = t.fields.map(_.dataType)
-      val fieldEvals = fieldTypes.zipWithIndex.map { case (dt, i) =>
-        val fieldName = ctx.freshName("fieldName")
-        val code = s"${ctx.javaType(dt)} $fieldName = " +
-          s"${ctx.getValue(input.primitive, dt, i.toString)};"
-        val isNull = s"${input.primitive}.isNullAt($i)"
-        GeneratedExpressionCode(code, isNull, fieldName)
-      }
-      val converter = createCodeForStruct(ctx, input.primitive, fieldEvals, fieldTypes)
-      val code = s"""
-        ${input.code}
-         UnsafeRow $output = null;
-         final boolean $outputIsNull = ${input.isNull};
-         if (!$outputIsNull) {
-           if (${input.primitive} instanceof UnsafeRow) {
-             $output = (UnsafeRow) ${input.primitive};
-           } else {
-             ${converter.code}
-             $output = ${converter.primitive};
-           }
-         }
-        """
-      GeneratedExpressionCode(code, outputIsNull, output)
-
-    case ArrayType(elementType, _) => createCodeForArray(ctx, input, elementType)
-
-    case MapType(kt, vt, _) => createCodeForMap(ctx, input, kt, vt)
-
-    case _ => input
-  }
-
   private val rowWriterClass = classOf[UnsafeRowWriter].getName
   private val arrayWriterClass = classOf[UnsafeArrayWriter].getName
 

From 27ecfe61f07c8413a7b8b9fbdf36ed99cf05227d Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 6 Oct 2015 08:45:31 -0700
Subject: [PATCH 146/896] [SPARK-10938] [SQL] remove typeId in columnar cache

This PR remove the typeId in columnar cache, it's not needed anymore, it also remove DATE and TIMESTAMP (use INT/LONG instead).

Author: Davies Liu <davies@databricks.com>

Closes #8989 from davies/refactor_cache.
---
 project/MimaExcludes.scala                    |  4 +-
 .../spark/sql/columnar/ColumnAccessor.scala   | 36 ++++------
 .../spark/sql/columnar/ColumnBuilder.scala    | 16 ++---
 .../spark/sql/columnar/ColumnStats.scala      |  4 --
 .../spark/sql/columnar/ColumnType.scala       | 71 ++++---------------
 .../sql/columnar/NullableColumnBuilder.scala  | 19 +++--
 .../CompressibleColumnBuilder.scala           | 27 ++++---
 .../compression/CompressionScheme.scala       |  6 +-
 .../spark/sql/columnar/ColumnStatsSuite.scala |  3 -
 .../spark/sql/columnar/ColumnTypeSuite.scala  | 10 +--
 .../sql/columnar/ColumnarTestUtils.scala      |  5 +-
 .../NullableColumnAccessorSuite.scala         |  8 +--
 .../columnar/NullableColumnBuilderSuite.scala |  5 +-
 13 files changed, 63 insertions(+), 151 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index b2e6be706637..2d4d146f5133 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -42,7 +42,9 @@ object MimaExcludes {
         excludePackage("org.spark-project.jetty"),
         MimaBuild.excludeSparkPackage("unused"),
         // SQL execution is considered private.
-        excludePackage("org.apache.spark.sql.execution")
+        excludePackage("org.apache.spark.sql.execution"),
+        // SQL columnar is considered private.
+        excludePackage("org.apache.spark.sql.columnar")
       ) ++
       MimaBuild.excludeSparkClass("streaming.flume.FlumeTestUtils") ++
       MimaBuild.excludeSparkClass("streaming.flume.PollingFlumeTestUtils") ++
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
index 4c29a093218a..2b1d7009874a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
@@ -103,35 +103,23 @@ private[sql] class GenericColumnAccessor(buffer: ByteBuffer, dataType: DataType)
   extends BasicColumnAccessor[Array[Byte]](buffer, GENERIC(dataType))
   with NullableColumnAccessor
 
-private[sql] class DateColumnAccessor(buffer: ByteBuffer)
-  extends NativeColumnAccessor(buffer, DATE)
-
-private[sql] class TimestampColumnAccessor(buffer: ByteBuffer)
-  extends NativeColumnAccessor(buffer, TIMESTAMP)
-
 private[sql] object ColumnAccessor {
   def apply(dataType: DataType, buffer: ByteBuffer): ColumnAccessor = {
-    val dup = buffer.duplicate().order(ByteOrder.nativeOrder)
-
-    // The first 4 bytes in the buffer indicate the column type.  This field is not used now,
-    // because we always know the data type of the column ahead of time.
-    dup.getInt()
+    val buf = buffer.order(ByteOrder.nativeOrder)
 
     dataType match {
-      case BooleanType => new BooleanColumnAccessor(dup)
-      case ByteType => new ByteColumnAccessor(dup)
-      case ShortType => new ShortColumnAccessor(dup)
-      case IntegerType => new IntColumnAccessor(dup)
-      case DateType => new DateColumnAccessor(dup)
-      case LongType => new LongColumnAccessor(dup)
-      case TimestampType => new TimestampColumnAccessor(dup)
-      case FloatType => new FloatColumnAccessor(dup)
-      case DoubleType => new DoubleColumnAccessor(dup)
-      case StringType => new StringColumnAccessor(dup)
-      case BinaryType => new BinaryColumnAccessor(dup)
+      case BooleanType => new BooleanColumnAccessor(buf)
+      case ByteType => new ByteColumnAccessor(buf)
+      case ShortType => new ShortColumnAccessor(buf)
+      case IntegerType | DateType => new IntColumnAccessor(buf)
+      case LongType | TimestampType => new LongColumnAccessor(buf)
+      case FloatType => new FloatColumnAccessor(buf)
+      case DoubleType => new DoubleColumnAccessor(buf)
+      case StringType => new StringColumnAccessor(buf)
+      case BinaryType => new BinaryColumnAccessor(buf)
       case DecimalType.Fixed(precision, scale) if precision < 19 =>
-        new FixedDecimalColumnAccessor(dup, precision, scale)
-      case other => new GenericColumnAccessor(dup, other)
+        new FixedDecimalColumnAccessor(buf, precision, scale)
+      case other => new GenericColumnAccessor(buf, other)
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
index 1620fc401ba6..2e60564f7c64 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
@@ -63,9 +63,8 @@ private[sql] class BasicColumnBuilder[JvmType](
     val size = if (initialSize == 0) DEFAULT_INITIAL_BUFFER_SIZE else initialSize
     this.columnName = columnName
 
-    // Reserves 4 bytes for column type ID
-    buffer = ByteBuffer.allocate(4 + size * columnType.defaultSize)
-    buffer.order(ByteOrder.nativeOrder()).putInt(columnType.typeId)
+    buffer = ByteBuffer.allocate(size * columnType.defaultSize)
+    buffer.order(ByteOrder.nativeOrder())
   }
 
   override def appendFrom(row: InternalRow, ordinal: Int): Unit = {
@@ -121,11 +120,6 @@ private[sql] class FixedDecimalColumnBuilder(
 private[sql] class GenericColumnBuilder(dataType: DataType)
   extends ComplexColumnBuilder(new GenericColumnStats(dataType), GENERIC(dataType))
 
-private[sql] class DateColumnBuilder extends NativeColumnBuilder(new DateColumnStats, DATE)
-
-private[sql] class TimestampColumnBuilder
-  extends NativeColumnBuilder(new TimestampColumnStats, TIMESTAMP)
-
 private[sql] object ColumnBuilder {
   val DEFAULT_INITIAL_BUFFER_SIZE = 1024 * 1024
 
@@ -154,10 +148,8 @@ private[sql] object ColumnBuilder {
       case BooleanType => new BooleanColumnBuilder
       case ByteType => new ByteColumnBuilder
       case ShortType => new ShortColumnBuilder
-      case IntegerType => new IntColumnBuilder
-      case DateType => new DateColumnBuilder
-      case LongType => new LongColumnBuilder
-      case TimestampType => new TimestampColumnBuilder
+      case IntegerType | DateType => new IntColumnBuilder
+      case LongType | TimestampType => new LongColumnBuilder
       case FloatType => new FloatColumnBuilder
       case DoubleType => new DoubleColumnBuilder
       case StringType => new StringColumnBuilder
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
index fbd51b7c34c8..3b5052b75406 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
@@ -266,7 +266,3 @@ private[sql] class GenericColumnStats(dataType: DataType) extends ColumnStats {
   override def collectedStatistics: GenericInternalRow =
     new GenericInternalRow(Array[Any](null, null, nullCount, count, sizeInBytes))
 }
-
-private[sql] class DateColumnStats extends IntColumnStats
-
-private[sql] class TimestampColumnStats extends LongColumnStats
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index ab482a363612..3a0cea8750f1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -38,9 +38,6 @@ private[sql] sealed abstract class ColumnType[JvmType] {
   // The catalyst data type of this column.
   def dataType: DataType
 
-  // A unique ID representing the type.
-  def typeId: Int
-
   // Default size in bytes for one element of type T (e.g. 4 for `Int`).
   def defaultSize: Int
 
@@ -107,7 +104,6 @@ private[sql] sealed abstract class ColumnType[JvmType] {
 
 private[sql] abstract class NativeColumnType[T <: AtomicType](
     val dataType: T,
-    val typeId: Int,
     val defaultSize: Int)
   extends ColumnType[T#InternalType] {
 
@@ -117,7 +113,7 @@ private[sql] abstract class NativeColumnType[T <: AtomicType](
   def scalaTag: TypeTag[dataType.InternalType] = dataType.tag
 }
 
-private[sql] object INT extends NativeColumnType(IntegerType, 0, 4) {
+private[sql] object INT extends NativeColumnType(IntegerType, 4) {
   override def append(v: Int, buffer: ByteBuffer): Unit = {
     buffer.putInt(v)
   }
@@ -145,7 +141,7 @@ private[sql] object INT extends NativeColumnType(IntegerType, 0, 4) {
   }
 }
 
-private[sql] object LONG extends NativeColumnType(LongType, 1, 8) {
+private[sql] object LONG extends NativeColumnType(LongType, 8) {
   override def append(v: Long, buffer: ByteBuffer): Unit = {
     buffer.putLong(v)
   }
@@ -173,7 +169,7 @@ private[sql] object LONG extends NativeColumnType(LongType, 1, 8) {
   }
 }
 
-private[sql] object FLOAT extends NativeColumnType(FloatType, 2, 4) {
+private[sql] object FLOAT extends NativeColumnType(FloatType, 4) {
   override def append(v: Float, buffer: ByteBuffer): Unit = {
     buffer.putFloat(v)
   }
@@ -201,7 +197,7 @@ private[sql] object FLOAT extends NativeColumnType(FloatType, 2, 4) {
   }
 }
 
-private[sql] object DOUBLE extends NativeColumnType(DoubleType, 3, 8) {
+private[sql] object DOUBLE extends NativeColumnType(DoubleType, 8) {
   override def append(v: Double, buffer: ByteBuffer): Unit = {
     buffer.putDouble(v)
   }
@@ -229,7 +225,7 @@ private[sql] object DOUBLE extends NativeColumnType(DoubleType, 3, 8) {
   }
 }
 
-private[sql] object BOOLEAN extends NativeColumnType(BooleanType, 4, 1) {
+private[sql] object BOOLEAN extends NativeColumnType(BooleanType, 1) {
   override def append(v: Boolean, buffer: ByteBuffer): Unit = {
     buffer.put(if (v) 1: Byte else 0: Byte)
   }
@@ -255,7 +251,7 @@ private[sql] object BOOLEAN extends NativeColumnType(BooleanType, 4, 1) {
   }
 }
 
-private[sql] object BYTE extends NativeColumnType(ByteType, 5, 1) {
+private[sql] object BYTE extends NativeColumnType(ByteType, 1) {
   override def append(v: Byte, buffer: ByteBuffer): Unit = {
     buffer.put(v)
   }
@@ -283,7 +279,7 @@ private[sql] object BYTE extends NativeColumnType(ByteType, 5, 1) {
   }
 }
 
-private[sql] object SHORT extends NativeColumnType(ShortType, 6, 2) {
+private[sql] object SHORT extends NativeColumnType(ShortType, 2) {
   override def append(v: Short, buffer: ByteBuffer): Unit = {
     buffer.putShort(v)
   }
@@ -311,7 +307,7 @@ private[sql] object SHORT extends NativeColumnType(ShortType, 6, 2) {
   }
 }
 
-private[sql] object STRING extends NativeColumnType(StringType, 7, 8) {
+private[sql] object STRING extends NativeColumnType(StringType, 8) {
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
     row.getUTF8String(ordinal).numBytes() + 4
   }
@@ -343,46 +339,9 @@ private[sql] object STRING extends NativeColumnType(StringType, 7, 8) {
   override def clone(v: UTF8String): UTF8String = v.clone()
 }
 
-private[sql] object DATE extends NativeColumnType(DateType, 8, 4) {
-  override def extract(buffer: ByteBuffer): Int = {
-    buffer.getInt
-  }
-
-  override def append(v: Int, buffer: ByteBuffer): Unit = {
-    buffer.putInt(v)
-  }
-
-  override def getField(row: InternalRow, ordinal: Int): Int = {
-    row.getInt(ordinal)
-  }
-
-  def setField(row: MutableRow, ordinal: Int, value: Int): Unit = {
-    row(ordinal) = value
-  }
-}
-
-private[sql] object TIMESTAMP extends NativeColumnType(TimestampType, 9, 8) {
-  override def extract(buffer: ByteBuffer): Long = {
-    buffer.getLong
-  }
-
-  override def append(v: Long, buffer: ByteBuffer): Unit = {
-    buffer.putLong(v)
-  }
-
-  override def getField(row: InternalRow, ordinal: Int): Long = {
-    row.getLong(ordinal)
-  }
-
-  override def setField(row: MutableRow, ordinal: Int, value: Long): Unit = {
-    row(ordinal) = value
-  }
-}
-
 private[sql] case class FIXED_DECIMAL(precision: Int, scale: Int)
   extends NativeColumnType(
     DecimalType(precision, scale),
-    10,
     FIXED_DECIMAL.defaultSize) {
 
   override def extract(buffer: ByteBuffer): Decimal = {
@@ -410,9 +369,7 @@ private[sql] object FIXED_DECIMAL {
   val defaultSize = 8
 }
 
-private[sql] sealed abstract class ByteArrayColumnType(
-    val typeId: Int,
-    val defaultSize: Int)
+private[sql] sealed abstract class ByteArrayColumnType(val defaultSize: Int)
   extends ColumnType[Array[Byte]] {
 
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
@@ -431,7 +388,7 @@ private[sql] sealed abstract class ByteArrayColumnType(
   }
 }
 
-private[sql] object BINARY extends ByteArrayColumnType(11, 16) {
+private[sql] object BINARY extends ByteArrayColumnType(16) {
 
   def dataType: DataType = BooleanType
 
@@ -447,7 +404,7 @@ private[sql] object BINARY extends ByteArrayColumnType(11, 16) {
 // Used to process generic objects (all types other than those listed above). Objects should be
 // serialized first before appending to the column `ByteBuffer`, and is also extracted as serialized
 // byte array.
-private[sql] case class GENERIC(dataType: DataType) extends ByteArrayColumnType(12, 16) {
+private[sql] case class GENERIC(dataType: DataType) extends ByteArrayColumnType(16) {
   override def setField(row: MutableRow, ordinal: Int, value: Array[Byte]): Unit = {
     row.update(ordinal, SparkSqlSerializer.deserialize[Any](value))
   }
@@ -463,10 +420,8 @@ private[sql] object ColumnType {
       case BooleanType => BOOLEAN
       case ByteType => BYTE
       case ShortType => SHORT
-      case IntegerType => INT
-      case DateType => DATE
-      case LongType => LONG
-      case TimestampType => TIMESTAMP
+      case IntegerType | DateType => INT
+      case LongType | TimestampType => LONG
       case FloatType => FLOAT
       case DoubleType => DOUBLE
       case StringType => STRING
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala
index ba47bc783f31..76cfddf1cd01 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala
@@ -25,14 +25,13 @@ import org.apache.spark.sql.catalyst.InternalRow
  * A stackable trait used for building byte buffer for a column containing null values.  Memory
  * layout of the final byte buffer is:
  * {{{
- *    .----------------------- Column type ID (4 bytes)
- *    |   .------------------- Null count N (4 bytes)
- *    |   |   .--------------- Null positions (4 x N bytes, empty if null count is zero)
- *    |   |   |     .--------- Non-null elements
- *    V   V   V     V
- *   +---+---+-----+---------+
- *   |   |   | ... | ... ... |
- *   +---+---+-----+---------+
+ *    .------------------- Null count N (4 bytes)
+ *    |   .--------------- Null positions (4 x N bytes, empty if null count is zero)
+ *    |   |     .--------- Non-null elements
+ *    V   V     V
+ *   +---+-----+---------+
+ *   |   | ... | ... ... |
+ *   +---+-----+---------+
  * }}}
  */
 private[sql] trait NullableColumnBuilder extends ColumnBuilder {
@@ -66,16 +65,14 @@ private[sql] trait NullableColumnBuilder extends ColumnBuilder {
 
   abstract override def build(): ByteBuffer = {
     val nonNulls = super.build()
-    val typeId = nonNulls.getInt()
     val nullDataLen = nulls.position()
 
     nulls.limit(nullDataLen)
     nulls.rewind()
 
     val buffer = ByteBuffer
-      .allocate(4 + 4 + nullDataLen + nonNulls.remaining())
+      .allocate(4 + nullDataLen + nonNulls.remaining())
       .order(ByteOrder.nativeOrder())
-      .putInt(typeId)
       .putInt(nullCount)
       .put(nulls)
       .put(nonNulls)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala
index 39b21ddb47ba..161021ff9615 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala
@@ -28,17 +28,16 @@ import org.apache.spark.sql.types.AtomicType
  * A stackable trait that builds optionally compressed byte buffer for a column.  Memory layout of
  * the final byte buffer is:
  * {{{
- *    .--------------------------- Column type ID (4 bytes)
- *    |   .----------------------- Null count N (4 bytes)
- *    |   |   .------------------- Null positions (4 x N bytes, empty if null count is zero)
- *    |   |   |     .------------- Compression scheme ID (4 bytes)
- *    |   |   |     |   .--------- Compressed non-null elements
- *    V   V   V     V   V
- *   +---+---+-----+---+---------+
- *   |   |   | ... |   | ... ... |
- *   +---+---+-----+---+---------+
- *    \-----------/ \-----------/
- *       header         body
+ *    .----------------------- Null count N (4 bytes)
+ *    |   .------------------- Null positions (4 x N bytes, empty if null count is zero)
+ *    |   |     .------------- Compression scheme ID (4 bytes)
+ *    |   |     |   .--------- Compressed non-null elements
+ *    V   V     V   V
+ *   +---+-----+---+---------+
+ *   |   | ... |   | ... ... |
+ *   +---+-----+---+---------+
+ *    \-------/ \-----------/
+ *     header         body
  * }}}
  */
 private[sql] trait CompressibleColumnBuilder[T <: AtomicType]
@@ -83,14 +82,13 @@ private[sql] trait CompressibleColumnBuilder[T <: AtomicType]
 
   override def build(): ByteBuffer = {
     val nonNullBuffer = buildNonNulls()
-    val typeId = nonNullBuffer.getInt()
     val encoder: Encoder[T] = {
       val candidate = compressionEncoders.minBy(_.compressionRatio)
       if (isWorthCompressing(candidate)) candidate else PassThrough.encoder(columnType)
     }
 
-    // Header = column type ID + null count + null positions
-    val headerSize = 4 + 4 + nulls.limit()
+    // Header = null count + null positions
+    val headerSize = 4 + nulls.limit()
     val compressedSize = if (encoder.compressedSize == 0) {
       nonNullBuffer.remaining()
     } else {
@@ -102,7 +100,6 @@ private[sql] trait CompressibleColumnBuilder[T <: AtomicType]
       .allocate(headerSize + 4 + compressedSize)
       .order(ByteOrder.nativeOrder)
       // Write the header
-      .putInt(typeId)
       .putInt(nullCount)
       .put(nulls)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala
index b1ef9b2ef784..9322b772fd89 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala
@@ -74,8 +74,8 @@ private[sql] object CompressionScheme {
 
   def columnHeaderSize(columnBuffer: ByteBuffer): Int = {
     val header = columnBuffer.duplicate().order(ByteOrder.nativeOrder)
-    val nullCount = header.getInt(4)
-    // Column type ID + null count + null positions
-    4 + 4 + 4 * nullCount
+    val nullCount = header.getInt()
+    // null count + null positions
+    4 + 4 * nullCount
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
index d0430d2a60e7..708fb4cf7933 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
@@ -27,10 +27,7 @@ class ColumnStatsSuite extends SparkFunSuite {
   testColumnStats(classOf[ByteColumnStats], BYTE, createRow(Byte.MaxValue, Byte.MinValue, 0))
   testColumnStats(classOf[ShortColumnStats], SHORT, createRow(Short.MaxValue, Short.MinValue, 0))
   testColumnStats(classOf[IntColumnStats], INT, createRow(Int.MaxValue, Int.MinValue, 0))
-  testColumnStats(classOf[DateColumnStats], DATE, createRow(Int.MaxValue, Int.MinValue, 0))
   testColumnStats(classOf[LongColumnStats], LONG, createRow(Long.MaxValue, Long.MinValue, 0))
-  testColumnStats(classOf[TimestampColumnStats], TIMESTAMP,
-    createRow(Long.MaxValue, Long.MinValue, 0))
   testColumnStats(classOf[FloatColumnStats], FLOAT, createRow(Float.MaxValue, Float.MinValue, 0))
   testColumnStats(classOf[DoubleColumnStats], DOUBLE,
     createRow(Double.MaxValue, Double.MinValue, 0))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
index 8f024690efd0..a4cbe3525ef9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
@@ -37,8 +37,8 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
 
   test("defaultSize") {
     val checks = Map(
-      BOOLEAN -> 1, BYTE -> 1, SHORT -> 2, INT -> 4, DATE -> 4,
-      LONG -> 8, TIMESTAMP -> 8, FLOAT -> 4, DOUBLE -> 8,
+      BOOLEAN -> 1, BYTE -> 1, SHORT -> 2, INT -> 4,
+      LONG -> 8, FLOAT -> 4, DOUBLE -> 8,
       STRING -> 8, BINARY -> 16, FIXED_DECIMAL(15, 10) -> 8,
       MAP_GENERIC -> 16)
 
@@ -66,9 +66,7 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
     checkActualSize(BYTE, Byte.MaxValue, 1)
     checkActualSize(SHORT, Short.MaxValue, 2)
     checkActualSize(INT, Int.MaxValue, 4)
-    checkActualSize(DATE, Int.MaxValue, 4)
     checkActualSize(LONG, Long.MaxValue, 8)
-    checkActualSize(TIMESTAMP, Long.MaxValue, 8)
     checkActualSize(FLOAT, Float.MaxValue, 4)
     checkActualSize(DOUBLE, Double.MaxValue, 8)
     checkActualSize(STRING, UTF8String.fromString("hello"), 4 + "hello".getBytes("utf-8").length)
@@ -93,12 +91,8 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
 
   testNativeColumnType(INT)(_.putInt(_), _.getInt)
 
-  testNativeColumnType(DATE)(_.putInt(_), _.getInt)
-
   testNativeColumnType(LONG)(_.putLong(_), _.getLong)
 
-  testNativeColumnType(TIMESTAMP)(_.putLong(_), _.getLong)
-
   testNativeColumnType(FLOAT)(_.putFloat(_), _.getFloat)
 
   testNativeColumnType(DOUBLE)(_.putDouble(_), _.getDouble)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
index 79bb7d072feb..123a7053c0a6 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
@@ -19,9 +19,10 @@ package org.apache.spark.sql.columnar
 
 import scala.collection.immutable.HashSet
 import scala.util.Random
+
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.types.{DataType, Decimal, AtomicType}
+import org.apache.spark.sql.types.{AtomicType, Decimal}
 import org.apache.spark.unsafe.types.UTF8String
 
 object ColumnarTestUtils {
@@ -43,9 +44,7 @@ object ColumnarTestUtils {
       case BYTE => (Random.nextInt(Byte.MaxValue * 2) - Byte.MaxValue).toByte
       case SHORT => (Random.nextInt(Short.MaxValue * 2) - Short.MaxValue).toShort
       case INT => Random.nextInt()
-      case DATE => Random.nextInt()
       case LONG => Random.nextLong()
-      case TIMESTAMP => Random.nextLong()
       case FLOAT => Random.nextFloat()
       case DOUBLE => Random.nextDouble()
       case STRING => UTF8String.fromString(Random.nextString(Random.nextInt(32)))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
index f4f6c7649bfa..a3a23d37d766 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
@@ -21,7 +21,7 @@ import java.nio.ByteBuffer
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.types.{StringType, ArrayType, DataType}
+import org.apache.spark.sql.types.{ArrayType, StringType}
 
 class TestNullableColumnAccessor[JvmType](
     buffer: ByteBuffer,
@@ -32,17 +32,15 @@ class TestNullableColumnAccessor[JvmType](
 object TestNullableColumnAccessor {
   def apply[JvmType](buffer: ByteBuffer, columnType: ColumnType[JvmType])
     : TestNullableColumnAccessor[JvmType] = {
-    // Skips the column type ID
-    buffer.getInt()
     new TestNullableColumnAccessor(buffer, columnType)
   }
 }
 
 class NullableColumnAccessorSuite extends SparkFunSuite {
-  import ColumnarTestUtils._
+  import org.apache.spark.sql.columnar.ColumnarTestUtils._
 
   Seq(
-    BOOLEAN, BYTE, SHORT, INT, DATE, LONG, TIMESTAMP, FLOAT, DOUBLE,
+    BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
     STRING, BINARY, FIXED_DECIMAL(15, 10), GENERIC(ArrayType(StringType)))
     .foreach {
     testNullableColumnAccessor(_)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
index 241d09ea205e..9557eead2710 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
@@ -38,7 +38,7 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
   import ColumnarTestUtils._
 
   Seq(
-    BOOLEAN, BYTE, SHORT, INT, DATE, LONG, TIMESTAMP, FLOAT, DOUBLE,
+    BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
     STRING, BINARY, FIXED_DECIMAL(15, 10), GENERIC(ArrayType(StringType)))
     .foreach {
     testNullableColumnBuilder(_)
@@ -53,7 +53,6 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       val columnBuilder = TestNullableColumnBuilder(columnType)
       val buffer = columnBuilder.build()
 
-      assertResult(columnType.typeId, "Wrong column type ID")(buffer.getInt())
       assertResult(0, "Wrong null count")(buffer.getInt())
       assert(!buffer.hasRemaining)
     }
@@ -68,7 +67,6 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
 
       val buffer = columnBuilder.build()
 
-      assertResult(columnType.typeId, "Wrong column type ID")(buffer.getInt())
       assertResult(0, "Wrong null count")(buffer.getInt())
     }
 
@@ -84,7 +82,6 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
 
       val buffer = columnBuilder.build()
 
-      assertResult(columnType.typeId, "Wrong column type ID")(buffer.getInt())
       assertResult(4, "Wrong null count")(buffer.getInt())
 
       // For null positions

From 744f03e700b0e3a7c2a92e92edc79d2374c19023 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Tue, 6 Oct 2015 10:17:12 -0700
Subject: [PATCH 147/896] [SPARK-10916] [YARN] Set perm gen size when launching
 containers on YARN.

This makes YARN containers behave like all other processes launched by
Spark, which launch with a default perm gen size of 256m unless
overridden by the user (or not needed by the vm).

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8970 from vanzin/SPARK-10916.
---
 .../spark/launcher/WorkerCommandBuilder.scala |  2 +-
 .../launcher/AbstractCommandBuilder.java      | 23 -------------------
 .../spark/launcher/CommandBuilderUtils.java   | 23 +++++++++++++++++++
 .../org/apache/spark/deploy/yarn/Client.scala |  4 +++-
 .../spark/deploy/yarn/ExecutorRunnable.scala  |  2 ++
 .../launcher/YarnCommandBuilderUtils.scala    | 21 +++++++++++++++--
 6 files changed, 48 insertions(+), 27 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/launcher/WorkerCommandBuilder.scala b/core/src/main/scala/org/apache/spark/launcher/WorkerCommandBuilder.scala
index 0c096656f923..a2add6161728 100644
--- a/core/src/main/scala/org/apache/spark/launcher/WorkerCommandBuilder.scala
+++ b/core/src/main/scala/org/apache/spark/launcher/WorkerCommandBuilder.scala
@@ -40,7 +40,7 @@ private[spark] class WorkerCommandBuilder(sparkHome: String, memoryMb: Int, comm
     cmd.add(s"-Xms${memoryMb}M")
     cmd.add(s"-Xmx${memoryMb}M")
     command.javaOpts.foreach(cmd.add)
-    addPermGenSizeOpt(cmd)
+    CommandBuilderUtils.addPermGenSizeOpt(cmd)
     addOptionString(cmd, getenv("SPARK_JAVA_OPTS"))
     cmd
   }
diff --git a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
index 0a237ee73b67..610e8bdaaa63 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
@@ -116,29 +116,6 @@ List<String> buildJavaCommand(String extraClassPath) throws IOException {
     return cmd;
   }
 
-  /**
-   * Adds the default perm gen size option for Spark if the VM requires it and the user hasn't
-   * set it.
-   */
-  void addPermGenSizeOpt(List<String> cmd) {
-    // Don't set MaxPermSize for IBM Java, or Oracle Java 8 and later.
-    if (getJavaVendor() == JavaVendor.IBM) {
-      return;
-    }
-    String[] version = System.getProperty("java.version").split("\\.");
-    if (Integer.parseInt(version[0]) > 1 || Integer.parseInt(version[1]) > 7) {
-      return;
-    }
-
-    for (String arg : cmd) {
-      if (arg.startsWith("-XX:MaxPermSize=")) {
-        return;
-      }
-    }
-
-    cmd.add("-XX:MaxPermSize=256m");
-  }
-
   void addOptionString(List<String> cmd, String options) {
     if (!isEmpty(options)) {
       for (String opt : parseOptionString(options)) {
diff --git a/launcher/src/main/java/org/apache/spark/launcher/CommandBuilderUtils.java b/launcher/src/main/java/org/apache/spark/launcher/CommandBuilderUtils.java
index a16c0d2b5ca0..d30c2ec5f87b 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/CommandBuilderUtils.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/CommandBuilderUtils.java
@@ -313,4 +313,27 @@ static String quoteForCommandString(String s) {
     return quoted.append('"').toString();
   }
 
+  /**
+   * Adds the default perm gen size option for Spark if the VM requires it and the user hasn't
+   * set it.
+   */
+  static void addPermGenSizeOpt(List<String> cmd) {
+    // Don't set MaxPermSize for IBM Java, or Oracle Java 8 and later.
+    if (getJavaVendor() == JavaVendor.IBM) {
+      return;
+    }
+    String[] version = System.getProperty("java.version").split("\\.");
+    if (Integer.parseInt(version[0]) > 1 || Integer.parseInt(version[1]) > 7) {
+      return;
+    }
+
+    for (String arg : cmd) {
+      if (arg.startsWith("-XX:MaxPermSize=")) {
+        return;
+      }
+    }
+
+    cmd.add("-XX:MaxPermSize=256m");
+  }
+
 }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 8c53c24a79c4..f8748ef6587a 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -54,8 +54,9 @@ import org.apache.hadoop.yarn.conf.YarnConfiguration
 import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException
 import org.apache.hadoop.yarn.util.Records
 
-import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkContext, SparkException}
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.launcher.YarnCommandBuilderUtils
 import org.apache.spark.util.Utils
 
 private[spark] class Client(
@@ -730,6 +731,7 @@ private[spark] class Client(
 
     // For log4j configuration to reference
     javaOpts += ("-Dspark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR)
+    YarnCommandBuilderUtils.addPermGenSizeOpt(javaOpts)
 
     val userClass =
       if (isClusterMode) {
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ExecutorRunnable.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ExecutorRunnable.scala
index 9abd09b3cc7a..2232ffba473b 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ExecutorRunnable.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ExecutorRunnable.scala
@@ -38,6 +38,7 @@ import org.apache.hadoop.yarn.ipc.YarnRPC
 import org.apache.hadoop.yarn.util.{ConverterUtils, Records}
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkException}
+import org.apache.spark.launcher.YarnCommandBuilderUtils
 import org.apache.spark.network.util.JavaUtils
 import org.apache.spark.util.Utils
 
@@ -199,6 +200,7 @@ class ExecutorRunnable(
 
     // For log4j configuration to reference
     javaOpts += ("-Dspark.yarn.app.container.log.dir=" + ApplicationConstants.LOG_DIR_EXPANSION_VAR)
+    YarnCommandBuilderUtils.addPermGenSizeOpt(javaOpts)
 
     val userClassPath = Client.getUserClasspath(sparkConf).flatMap { uri =>
       val absPath =
diff --git a/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala b/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala
index 3ac36ef0a1c3..7d246bf40712 100644
--- a/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala
+++ b/yarn/src/main/scala/org/apache/spark/launcher/YarnCommandBuilderUtils.scala
@@ -17,11 +17,28 @@
 
 package org.apache.spark.launcher
 
+import scala.collection.JavaConverters._
+import scala.collection.mutable.ListBuffer
+
 /**
- * Exposes needed methods
+ * Exposes methods from the launcher library that are used by the YARN backend.
  */
 private[spark] object YarnCommandBuilderUtils {
-  def quoteForBatchScript(arg: String) : String = {
+
+  def quoteForBatchScript(arg: String): String = {
     CommandBuilderUtils.quoteForBatchScript(arg)
   }
+
+  /**
+   * Adds the perm gen configuration to the list of java options if needed and not yet added.
+   *
+   * Note that this method adds the option based on the local JVM version; if the node where
+   * the container is running has a different Java version, there's a risk that the option will
+   * not be added (e.g. if the AM is running Java 8 but the container's node is set up to use
+   * Java 7).
+   */
+  def addPermGenSizeOpt(args: ListBuffer[String]): Unit = {
+    CommandBuilderUtils.addPermGenSizeOpt(args.asJava)
+  }
+
 }

From e9783601599758df87418bf61a7b4636f06714fa Mon Sep 17 00:00:00 2001
From: Thomas Graves <tgraves@staydecay.corp.gq1.yahoo.com>
Date: Tue, 6 Oct 2015 10:18:50 -0700
Subject: [PATCH 148/896] [SPARK-10901] [YARN] spark.yarn.user.classpath.first
 doesn't work

This should go into 1.5.2 also.

The issue is we were no longer adding the __app__.jar to the system classpath.

Author: Thomas Graves <tgraves@staydecay.corp.gq1.yahoo.com>
Author: Tom Graves <tgraves@yahoo-inc.com>

Closes #8959 from tgravescs/SPARK-10901.
---
 .../org/apache/spark/deploy/yarn/Client.scala | 39 +++++++++++++------
 1 file changed, 27 insertions(+), 12 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index f8748ef6587a..eb3b7fb88508 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -1155,13 +1155,24 @@ object Client extends Logging {
     }
 
     if (sparkConf.getBoolean("spark.yarn.user.classpath.first", false)) {
-      val userClassPath =
+      // in order to properly add the app jar when user classpath is first
+      // we have to do the mainJar separate in order to send the right thing
+      // into addFileToClasspath
+      val mainJar =
         if (args != null) {
-          getUserClasspath(Option(args.userJar), Option(args.addJars))
+          getMainJarUri(Option(args.userJar))
         } else {
-          getUserClasspath(sparkConf)
+          getMainJarUri(sparkConf.getOption(CONF_SPARK_USER_JAR))
         }
-      userClassPath.foreach { x =>
+      mainJar.foreach(addFileToClasspath(sparkConf, _, APP_JAR, env))
+
+      val secondaryJars =
+        if (args != null) {
+          getSecondaryJarUris(Option(args.addJars))
+        } else {
+          getSecondaryJarUris(sparkConf.getOption(CONF_SPARK_YARN_SECONDARY_JARS))
+        }
+      secondaryJars.foreach { x =>
         addFileToClasspath(sparkConf, x, null, env)
       }
     }
@@ -1178,16 +1189,20 @@ object Client extends Logging {
    * @param conf Spark configuration.
    */
   def getUserClasspath(conf: SparkConf): Array[URI] = {
-    getUserClasspath(conf.getOption(CONF_SPARK_USER_JAR),
-      conf.getOption(CONF_SPARK_YARN_SECONDARY_JARS))
+    val mainUri = getMainJarUri(conf.getOption(CONF_SPARK_USER_JAR))
+    val secondaryUris = getSecondaryJarUris(conf.getOption(CONF_SPARK_YARN_SECONDARY_JARS))
+    (mainUri ++ secondaryUris).toArray
   }
 
-  private def getUserClasspath(
-      mainJar: Option[String],
-      secondaryJars: Option[String]): Array[URI] = {
-    val mainUri = mainJar.orElse(Some(APP_JAR)).map(new URI(_))
-    val secondaryUris = secondaryJars.map(_.split(",")).toSeq.flatten.map(new URI(_))
-    (mainUri ++ secondaryUris).toArray
+  private def getMainJarUri(mainJar: Option[String]): Option[URI] = {
+    mainJar.flatMap { path =>
+      val uri = new URI(path)
+      if (uri.getScheme == LOCAL_SCHEME) Some(uri) else None
+    }.orElse(Some(new URI(APP_JAR)))
+  }
+
+  private def getSecondaryJarUris(secondaryJars: Option[String]): Seq[URI] = {
+    secondaryJars.map(_.split(",")).toSeq.flatten.map(new URI(_))
   }
 
   /**

From 5952bdb7df20d007d59f82261095faca3822c6f6 Mon Sep 17 00:00:00 2001
From: vectorijk <jiangkai@gmail.com>
Date: Tue, 6 Oct 2015 12:43:28 -0700
Subject: [PATCH 149/896] [SPARK-10688] [ML] [PYSPARK] Python API for
 AFTSurvivalRegression

Implement Python API for AFTSurvivalRegression

Author: vectorijk <jiangkai@gmail.com>

Closes #8926 from vectorijk/spark-10688.
---
 python/pyspark/ml/regression.py | 171 +++++++++++++++++++++++++++++++-
 1 file changed, 169 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index 21d454f9003b..a0f7f54e6521 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -22,8 +22,10 @@
 from pyspark.mllib.common import inherit_doc
 
 
-__all__ = ['DecisionTreeRegressor', 'DecisionTreeRegressionModel', 'GBTRegressor',
-           'GBTRegressionModel', 'LinearRegression', 'LinearRegressionModel',
+__all__ = ['AFTSurvivalRegression', 'AFTSurvivalRegressionModel',
+           'DecisionTreeRegressor', 'DecisionTreeRegressionModel',
+           'GBTRegressor', 'GBTRegressionModel',
+           'LinearRegression', 'LinearRegressionModel',
            'RandomForestRegressor', 'RandomForestRegressionModel']
 
 
@@ -609,6 +611,171 @@ class GBTRegressionModel(TreeEnsembleModels):
     """
 
 
+@inherit_doc
+class AFTSurvivalRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
+                            HasFitIntercept, HasMaxIter, HasTol):
+    """
+    Accelerated Failure Time (AFT) Model Survival Regression
+
+    Fit a parametric AFT survival regression model based on the Weibull distribution
+    of the survival time.
+
+    .. seealso:: `AFT Model <https://en.wikipedia.org/wiki/Accelerated_failure_time_model>`_
+
+    >>> from pyspark.mllib.linalg import Vectors
+    >>> df = sqlContext.createDataFrame([
+    ...     (1.0, Vectors.dense(1.0), 1.0),
+    ...     (0.0, Vectors.sparse(1, [], []), 0.0)], ["label", "features", "censor"])
+    >>> aftsr = AFTSurvivalRegression()
+    >>> model = aftsr.fit(df)
+    >>> model.predict(Vectors.dense(6.3))
+    1.0
+    >>> model.predictQuantiles(Vectors.dense(6.3))
+    DenseVector([0.0101, 0.0513, 0.1054, 0.2877, 0.6931, 1.3863, 2.3026, 2.9957, 4.6052])
+    >>> model.transform(df).show()
+    +-----+---------+------+----------+
+    |label| features|censor|prediction|
+    +-----+---------+------+----------+
+    |  1.0|    [1.0]|   1.0|       1.0|
+    |  0.0|(1,[],[])|   0.0|       1.0|
+    +-----+---------+------+----------+
+    ...
+
+    .. versionadded:: 1.6.0
+    """
+
+    # a placeholder to make it appear in the generated doc
+    censorCol = Param(Params._dummy(), "censorCol",
+                      "censor column name. The value of this column could be 0 or 1. " +
+                      "If the value is 1, it means the event has occurred i.e. " +
+                      "uncensored; otherwise censored.")
+    quantileProbabilities = \
+        Param(Params._dummy(), "quantileProbabilities",
+              "quantile probabilities array. Values of the quantile probabilities array " +
+              "should be in the range (0, 1) and the array should be non-empty.")
+    quantilesCol = Param(Params._dummy(), "quantilesCol",
+                         "quantiles column name. This column will output quantiles of " +
+                         "corresponding quantileProbabilities if it is set.")
+
+    @keyword_only
+    def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
+                 fitIntercept=True, maxIter=100, tol=1E-6, censorCol="censor",
+                 quantileProbabilities=None, quantilesCol=None):
+        """
+        __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
+                 fitIntercept=True, maxIter=100, tol=1E-6, censorCol="censor", \
+                 quantileProbabilities=[0.01, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.99], \
+                 quantilesCol=None):
+        """
+        super(AFTSurvivalRegression, self).__init__()
+        self._java_obj = self._new_java_obj(
+            "org.apache.spark.ml.regression.AFTSurvivalRegression", self.uid)
+        #: Param for censor column name
+        self.censorCol = Param(self,  "censorCol",
+                               "censor column name. The value of this column could be 0 or 1. " +
+                               "If the value is 1, it means the event has occurred i.e. " +
+                               "uncensored; otherwise censored.")
+        #: Param for quantile probabilities array
+        self.quantileProbabilities = \
+            Param(self, "quantileProbabilities",
+                  "quantile probabilities array. Values of the quantile probabilities array " +
+                  "should be in the range (0, 1) and the array should be non-empty.")
+        #: Param for quantiles column name
+        self.quantilesCol = Param(self, "quantilesCol",
+                                  "quantiles column name. This column will output quantiles of " +
+                                  "corresponding quantileProbabilities if it is set.")
+        self._setDefault(censorCol="censor",
+                         quantileProbabilities=[0.01, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.99])
+        kwargs = self.__init__._input_kwargs
+        self.setParams(**kwargs)
+
+    @keyword_only
+    @since("1.6.0")
+    def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
+                  fitIntercept=True, maxIter=100, tol=1E-6, censorCol="censor",
+                  quantileProbabilities=None, quantilesCol=None):
+        """
+        setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
+                  fitIntercept=True, maxIter=100, tol=1E-6, censorCol="censor", \
+                  quantileProbabilities=[0.01, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.99], \
+                  quantilesCol=None):
+        """
+        kwargs = self.setParams._input_kwargs
+        if quantileProbabilities is None:
+            return self._set(**kwargs).setQuantileProbabilities([0.01, 0.05, 0.1, 0.25, 0.5,
+                                                                 0.75, 0.9, 0.95, 0.99])
+        else:
+            return self._set(**kwargs)
+
+    def _create_model(self, java_model):
+        return AFTSurvivalRegressionModel(java_model)
+
+    @since("1.6.0")
+    def setCensorCol(self, value):
+        """
+        Sets the value of :py:attr:`censorCol`.
+        """
+        self._paramMap[self.censorCol] = value
+        return self
+
+    @since("1.6.0")
+    def getCensorCol(self):
+        """
+        Gets the value of censorCol or its default value.
+        """
+        return self.getOrDefault(self.censorCol)
+
+    @since("1.6.0")
+    def setQuantileProbabilities(self, value):
+        """
+        Sets the value of :py:attr:`quantileProbabilities`.
+        """
+        self._paramMap[self.quantileProbabilities] = value
+        return self
+
+    @since("1.6.0")
+    def getQuantileProbabilities(self):
+        """
+        Gets the value of quantileProbabilities or its default value.
+        """
+        return self.getOrDefault(self.quantileProbabilities)
+
+    @since("1.6.0")
+    def setQuantilesCol(self, value):
+        """
+        Sets the value of :py:attr:`quantilesCol`.
+        """
+        self._paramMap[self.quantilesCol] = value
+        return self
+
+    @since("1.6.0")
+    def getQuantilesCol(self):
+        """
+        Gets the value of quantilesCol or its default value.
+        """
+        return self.getOrDefault(self.quantilesCol)
+
+
+class AFTSurvivalRegressionModel(JavaModel):
+    """
+    Model fitted by AFTSurvivalRegression.
+
+    .. versionadded:: 1.6.0
+    """
+
+    def predictQuantiles(self, features):
+        """
+        Predicted Quantiles
+        """
+        return self._call_java("predictQuantiles", features)
+
+    def predict(self, features):
+        """
+        Predicted value
+        """
+        return self._call_java("predict", features)
+
+
 if __name__ == "__main__":
     import doctest
     from pyspark.context import SparkContext

From 5e035403d41527f092705c68f0dd1b4b946014d6 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 6 Oct 2015 14:58:42 -0700
Subject: [PATCH 150/896] [SPARK-10957] [ML] setParams changes
 quantileProbabilities unexpectly in PySpark's AFTSurvivalRegression

If user doesn't specify `quantileProbs` in `setParams`, it will get reset to the default value. We don't need special handling here. vectorijk yanboliang

Author: Xiangrui Meng <meng@databricks.com>

Closes #9001 from mengxr/SPARK-10957.
---
 python/pyspark/ml/regression.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index a0f7f54e6521..e12abeba019f 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -701,11 +701,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
                   quantilesCol=None):
         """
         kwargs = self.setParams._input_kwargs
-        if quantileProbabilities is None:
-            return self._set(**kwargs).setQuantileProbabilities([0.01, 0.05, 0.1, 0.25, 0.5,
-                                                                 0.75, 0.9, 0.95, 0.99])
-        else:
-            return self._set(**kwargs)
+        return self._set(**kwargs)
 
     def _create_model(self, java_model):
         return AFTSurvivalRegressionModel(java_model)

From ffe6831e49e28eb855f857fdfa5dd99341e80c9d Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Tue, 6 Oct 2015 16:51:03 -0700
Subject: [PATCH 151/896] [SPARK-10885] [STREAMING] Display the failed output
 op in Streaming UI

This PR implements the following features for both `master` and `branch-1.5`.
1. Display the failed output op count in the batch list
2. Display the failure reason of output op in the batch detail page

Screenshots:
<img width="1356" alt="1" src="https://cloud.githubusercontent.com/assets/1000778/10198387/5b2b97ec-67ce-11e5-81c2-f818b9d2f3ad.png">
<img width="1356" alt="2" src="https://cloud.githubusercontent.com/assets/1000778/10198388/5b76ac14-67ce-11e5-8c8b-de2683c5b485.png">

There are still two remaining problems in the UI.
1. If an output operation doesn't run any spark job, we cannot get the its duration since now it's the sum of all jobs' durations.
2. If an output operation doesn't run any spark job, we cannot get the description since it's the latest job's call site.

We need to add new `StreamingListenerEvent` about output operations to fix them. So I'd like to fix them only for `master` in another PR.

Author: zsxwing <zsxwing@gmail.com>

Closes #8950 from zsxwing/batch-failure.
---
 .../spark/streaming/scheduler/BatchInfo.scala |  10 ++
 .../spark/streaming/scheduler/JobSet.scala    |   1 +
 .../spark/streaming/ui/AllBatchesTable.scala  |  15 +-
 .../apache/spark/streaming/ui/BatchPage.scala | 134 +++++++++++++++---
 .../spark/streaming/ui/BatchUIData.scala      |   6 +-
 .../spark/streaming/UISeleniumSuite.scala     |   4 +-
 6 files changed, 143 insertions(+), 27 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
index 3c869561ef8b..463f899dc249 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
@@ -41,6 +41,8 @@ case class BatchInfo(
 
   private var _failureReasons: Map[Int, String] = Map.empty
 
+  private var _numOutputOp: Int = 0
+
   @deprecated("Use streamIdToInputInfo instead", "1.5.0")
   def streamIdToNumRecords: Map[Int, Long] = streamIdToInputInfo.mapValues(_.numRecords)
 
@@ -77,4 +79,12 @@ case class BatchInfo(
 
   /** Failure reasons corresponding to every output ops in the batch */
   private[streaming] def failureReasons = _failureReasons
+
+  /** Set the number of output operations in this batch */
+  private[streaming] def setNumOutputOp(numOutputOp: Int): Unit = {
+    _numOutputOp = numOutputOp
+  }
+
+  /** Return the number of output operations in this batch */
+  private[streaming] def numOutputOp: Int = _numOutputOp
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
index 255ccf053668..08f63cc99268 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
@@ -81,6 +81,7 @@ case class JobSet(
       if (processingEndTime >= 0) Some(processingEndTime) else None
     )
     binfo.setFailureReason(failureReasons)
+    binfo.setNumOutputOp(jobs.size)
     binfo
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
index f702bd5bc946..3e6590d66f58 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
@@ -107,9 +107,10 @@ private[ui] class ActiveBatchTable(
 private[ui] class CompletedBatchTable(batches: Seq[BatchUIData], batchInterval: Long)
   extends BatchTableBase("completed-batches-table", batchInterval) {
 
-  override protected def columns: Seq[Node] = super.columns ++
-    <th>Total Delay
-      {SparkUIUtils.tooltip("Total time taken to handle a batch", "top")}</th>
+  override protected def columns: Seq[Node] = super.columns ++ {
+    <th>Total Delay {SparkUIUtils.tooltip("Total time taken to handle a batch", "top")}</th>
+      <th>Output Ops: Succeeded/Total</th>
+  }
 
   override protected def renderRows: Seq[Node] = {
     batches.flatMap(batch => <tr>{completedBatchRow(batch)}</tr>)
@@ -118,9 +119,17 @@ private[ui] class CompletedBatchTable(batches: Seq[BatchUIData], batchInterval:
   private def completedBatchRow(batch: BatchUIData): Seq[Node] = {
     val totalDelay = batch.totalDelay
     val formattedTotalDelay = totalDelay.map(SparkUIUtils.formatDuration).getOrElse("-")
+    val numFailedOutputOp = batch.failureReason.size
+    val outputOpColumn = if (numFailedOutputOp > 0) {
+        s"${batch.numOutputOp - numFailedOutputOp}/${batch.numOutputOp}" +
+          s" (${numFailedOutputOp} failed)"
+      } else {
+        s"${batch.numOutputOp}/${batch.numOutputOp}"
+      }
     baseRow(batch) ++
       <td sorttable_customkey={totalDelay.getOrElse(Long.MaxValue).toString}>
         {formattedTotalDelay}
       </td>
+      <td>{outputOpColumn}</td>
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
index 9129c1f26abd..1b717b64542d 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
@@ -38,6 +38,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     <th>Output Op Id</th>
       <th>Description</th>
       <th>Duration</th>
+      <th>Status</th>
       <th>Job Id</th>
       <th>Duration</th>
       <th class="sorttable_nosort">Stages: Succeeded/Total</th>
@@ -49,18 +50,42 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       outputOpId: OutputOpId,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
+      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       sparkJob: SparkJobIdWithUIData): Seq[Node] = {
     if (sparkJob.jobUIData.isDefined) {
       generateNormalJobRow(outputOpId, outputOpDescription, formattedOutputOpDuration,
-        numSparkJobRowsInOutputOp, isFirstRow, sparkJob.jobUIData.get)
+        outputOpStatus, numSparkJobRowsInOutputOp, isFirstRow, sparkJob.jobUIData.get)
     } else {
       generateDroppedJobRow(outputOpId, outputOpDescription, formattedOutputOpDuration,
-        numSparkJobRowsInOutputOp, isFirstRow, sparkJob.sparkJobId)
+        outputOpStatus, numSparkJobRowsInOutputOp, isFirstRow, sparkJob.sparkJobId)
     }
   }
 
+  private def generateOutputOpRowWithoutSparkJobs(
+    outputOpId: OutputOpId,
+    outputOpDescription: Seq[Node],
+    formattedOutputOpDuration: String,
+    outputOpStatus: String): Seq[Node] = {
+    <tr>
+      <td class="output-op-id-cell" >{outputOpId.toString}</td>
+      <td>{outputOpDescription}</td>
+      <td>{formattedOutputOpDuration}</td>
+      {outputOpStatusCell(outputOpStatus, rowspan = 1)}
+      <!-- Job Id -->
+      <td>-</td>
+      <!-- Duration -->
+      <td>-</td>
+      <!-- Stages: Succeeded/Total -->
+      <td>-</td>
+      <!-- Tasks (for all stages): Succeeded/Total -->
+      <td>-</td>
+      <!-- Error -->
+      <td>-</td>
+    </tr>
+  }
+
   /**
    * Generate a row for a Spark Job. Because duplicated output op infos needs to be collapsed into
    * one cell, we use "rowspan" for the first row of a output op.
@@ -69,6 +94,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       outputOpId: OutputOpId,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
+      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       sparkJob: JobUIData): Seq[Node] = {
@@ -94,7 +120,8 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         <td rowspan={numSparkJobRowsInOutputOp.toString}>
           {outputOpDescription}
         </td>
-        <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td>
+        <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td> ++
+        {outputOpStatusCell(outputOpStatus, numSparkJobRowsInOutputOp)}
       } else {
         Nil
       }
@@ -125,7 +152,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
             total = sparkJob.numTasks - sparkJob.numSkippedTasks)
         }
       </td>
-      {failureReasonCell(lastFailureReason)}
+      {failureReasonCell(lastFailureReason, rowspan = 1)}
     </tr>
   }
 
@@ -137,6 +164,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       outputOpId: OutputOpId,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
+      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       jobId: Int): Seq[Node] = {
@@ -147,7 +175,8 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       if (isFirstRow) {
         <td class="output-op-id-cell" rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpId.toString}</td>
           <td rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpDescription}</td>
-          <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td>
+          <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td> ++
+          {outputOpStatusCell(outputOpStatus, numSparkJobRowsInOutputOp)}
       } else {
         Nil
       }
@@ -156,7 +185,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     <tr>
       {prefixCells}
       <td sorttable_customkey={jobId.toString}>
-        {jobId.toString}
+        {if (jobId >= 0) jobId.toString else "-"}
       </td>
       <!-- Duration -->
       <td>-</td>
@@ -170,7 +199,9 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
   }
 
   private def generateOutputOpIdRow(
-      outputOpId: OutputOpId, sparkJobs: Seq[SparkJobIdWithUIData]): Seq[Node] = {
+      outputOpId: OutputOpId,
+      outputOpStatus: String,
+      sparkJobs: Seq[SparkJobIdWithUIData]): Seq[Node] = {
     // We don't count the durations of dropped jobs
     val sparkJobDurations = sparkJobs.filter(_.jobUIData.nonEmpty).map(_.jobUIData.get).
       map(sparkJob => {
@@ -189,12 +220,32 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
 
     val description = generateOutputOpDescription(sparkJobs)
 
-    generateJobRow(
-      outputOpId, description, formattedOutputOpDuration, sparkJobs.size, true, sparkJobs.head) ++
-      sparkJobs.tail.map { sparkJob =>
+    if (sparkJobs.isEmpty) {
+      generateOutputOpRowWithoutSparkJobs(
+        outputOpId, description, formattedOutputOpDuration, outputOpStatus)
+    } else {
+      val firstRow =
         generateJobRow(
-          outputOpId, description, formattedOutputOpDuration, sparkJobs.size, false, sparkJob)
-      }.flatMap(x => x)
+          outputOpId,
+          description,
+          formattedOutputOpDuration,
+          outputOpStatus,
+          sparkJobs.size,
+          true,
+          sparkJobs.head)
+      val tailRows =
+        sparkJobs.tail.map { sparkJob =>
+          generateJobRow(
+            outputOpId,
+            description,
+            formattedOutputOpDuration,
+            outputOpStatus,
+            sparkJobs.size,
+            false,
+            sparkJob)
+        }
+      (firstRow ++ tailRows).flatten
+    }
   }
 
   private def generateOutputOpDescription(sparkJobs: Seq[SparkJobIdWithUIData]): Seq[Node] = {
@@ -228,7 +279,10 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     }
   }
 
-  private def failureReasonCell(failureReason: String): Seq[Node] = {
+  private def failureReasonCell(
+      failureReason: String,
+      rowspan: Int,
+      includeFirstLineInExpandDetails: Boolean = true): Seq[Node] = {
     val isMultiline = failureReason.indexOf('\n') >= 0
     // Display the first line by default
     val failureReasonSummary = StringEscapeUtils.escapeHtml4(
@@ -237,6 +291,13 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       } else {
         failureReason
       })
+    val failureDetails =
+      if (isMultiline && !includeFirstLineInExpandDetails) {
+        // Skip the first line
+        failureReason.substring(failureReason.indexOf('\n') + 1)
+      } else {
+        failureReason
+      }
     val details = if (isMultiline) {
       // scalastyle:off
       <span onclick="this.parentNode.querySelector('.stacktrace-details').classList.toggle('collapsed')"
@@ -244,13 +305,20 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         +details
       </span> ++
         <div class="stacktrace-details collapsed">
-          <pre>{failureReason}</pre>
+          <pre>{failureDetails}</pre>
         </div>
       // scalastyle:on
     } else {
       ""
     }
-    <td valign="middle" style="max-width: 300px">{failureReasonSummary}{details}</td>
+
+    if (rowspan == 1) {
+      <td valign="middle" style="max-width: 300px">{failureReasonSummary}{details}</td>
+    } else {
+      <td valign="middle" style="max-width: 300px" rowspan={rowspan.toString}>
+        {failureReasonSummary}{details}
+      </td>
+    }
   }
 
   private def getJobData(sparkJobId: SparkJobId): Option[JobUIData] = {
@@ -265,16 +333,31 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
    * Generate the job table for the batch.
    */
   private def generateJobTable(batchUIData: BatchUIData): Seq[Node] = {
-    val outputOpIdToSparkJobIds = batchUIData.outputOpIdSparkJobIdPairs.groupBy(_.outputOpId).toSeq.
-      sortBy(_._1). // sorted by OutputOpId
+    val outputOpIdToSparkJobIds = batchUIData.outputOpIdSparkJobIdPairs.groupBy(_.outputOpId).
       map { case (outputOpId, outputOpIdAndSparkJobIds) =>
         // sort SparkJobIds for each OutputOpId
         (outputOpId, outputOpIdAndSparkJobIds.map(_.sparkJobId).sorted)
       }
+    val outputOps = (0 until batchUIData.numOutputOp).map { outputOpId =>
+      val status = batchUIData.failureReason.get(outputOpId).map { failure =>
+        if (failure.startsWith("org.apache.spark.SparkException")) {
+          "Failed due to Spark job error\n" + failure
+        } else {
+          var nextLineIndex = failure.indexOf("\n")
+          if (nextLineIndex < 0) {
+            nextLineIndex = failure.size
+          }
+          val firstLine = failure.substring(0, nextLineIndex)
+          s"Failed due to error: $firstLine\n$failure"
+        }
+      }.getOrElse("Succeeded")
+      val sparkJobIds = outputOpIdToSparkJobIds.getOrElse(outputOpId, Seq.empty)
+      (outputOpId, status, sparkJobIds)
+    }
     sparkListener.synchronized {
-      val outputOpIdWithJobs: Seq[(OutputOpId, Seq[SparkJobIdWithUIData])] =
-        outputOpIdToSparkJobIds.map { case (outputOpId, sparkJobIds) =>
-          (outputOpId,
+      val outputOpIdWithJobs: Seq[(OutputOpId, String, Seq[SparkJobIdWithUIData])] =
+        outputOps.map { case (outputOpId, status, sparkJobIds) =>
+          (outputOpId, status,
             sparkJobIds.map(sparkJobId => SparkJobIdWithUIData(sparkJobId, getJobData(sparkJobId))))
         }
 
@@ -285,7 +368,8 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         <tbody>
           {
             outputOpIdWithJobs.map {
-              case (outputOpId, sparkJobIds) => generateOutputOpIdRow(outputOpId, sparkJobIds)
+              case (outputOpId, status, sparkJobIds) =>
+                generateOutputOpIdRow(outputOpId, status, sparkJobIds)
             }
           }
         </tbody>
@@ -386,4 +470,12 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     Unparsed(StringEscapeUtils.escapeHtml4(metadataDescription).
       replaceAllLiterally("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").replaceAllLiterally("\n", "<br/>"))
   }
+
+  private def outputOpStatusCell(status: String, rowspan: Int): Seq[Node] = {
+    if (status == "Succeeded") {
+      <td rowspan={rowspan.toString}>Succeeded</td>
+    } else {
+      failureReasonCell(status, rowspan, includeFirstLineInExpandDetails = false)
+    }
+  }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
index ae508c0e9577..e6c2e2140c6c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
@@ -30,6 +30,8 @@ private[ui] case class BatchUIData(
     val submissionTime: Long,
     val processingStartTime: Option[Long],
     val processingEndTime: Option[Long],
+    val numOutputOp: Int,
+    val failureReason: Map[Int, String],
     var outputOpIdSparkJobIdPairs: Seq[OutputOpIdAndSparkJobId] = Seq.empty) {
 
   /**
@@ -69,7 +71,9 @@ private[ui] object BatchUIData {
       batchInfo.streamIdToInputInfo,
       batchInfo.submissionTime,
       batchInfo.processingStartTime,
-      batchInfo.processingEndTime
+      batchInfo.processingEndTime,
+      batchInfo.numOutputOp,
+      batchInfo.failureReasons
     )
   }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
index 068a6cb0e8fa..d1df78871d3b 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
@@ -121,7 +121,7 @@ class UISeleniumSuite
         }
         findAll(cssSelector("""#completed-batches-table th""")).map(_.text).toSeq should be {
           List("Batch Time", "Input Size", "Scheduling Delay (?)", "Processing Time (?)",
-            "Total Delay (?)")
+            "Total Delay (?)", "Output Ops: Succeeded/Total")
         }
 
         val batchLinks =
@@ -138,7 +138,7 @@ class UISeleniumSuite
         summaryText should contain ("Total delay:")
 
         findAll(cssSelector("""#batch-job-table th""")).map(_.text).toSeq should be {
-          List("Output Op Id", "Description", "Duration", "Job Id", "Duration",
+          List("Output Op Id", "Description", "Duration", "Status", "Job Id", "Duration",
             "Stages: Succeeded/Total", "Tasks (for all stages): Succeeded/Total", "Error")
         }
 

From 27cdde2ff87346fb54318532a476bf85f5837da7 Mon Sep 17 00:00:00 2001
From: Xin Ren <iamshrek@126.com>
Date: Wed, 7 Oct 2015 15:00:19 +0100
Subject: [PATCH 152/896] [SPARK-10669] [DOCS] Link to each language's API in
 codetabs in ML docs: spark.mllib

In the Markdown docs for the spark.mllib Programming Guide, we have code examples with codetabs for each language. We should link to each language's API docs within the corresponding codetab, but we are inconsistent about this. For an example of what we want to do, see the "ChiSqSelector" section in https://github.com/apache/spark/blob/64743870f23bffb8d96dcc8a0181c1452782a151/docs/mllib-feature-extraction.md
This JIRA is just for spark.mllib, not spark.ml.

Please let me know if more work is needed, thanks a lot.

Author: Xin Ren <iamshrek@126.com>

Closes #8977 from keypointt/SPARK-10669.
---
 docs/mllib-clustering.md               | 30 ++++++++++++++--
 docs/mllib-collaborative-filtering.md  |  6 ++++
 docs/mllib-data-types.md               | 47 ++++++++++++++++++++++++++
 docs/mllib-decision-tree.md            | 22 ++++++++----
 docs/mllib-dimensionality-reduction.md | 10 ++++++
 docs/mllib-ensembles.md                | 44 +++++++++++++++++-------
 docs/mllib-evaluation-metrics.md       | 15 ++++++++
 docs/mllib-feature-extraction.md       | 47 ++++++++++++++++++++------
 docs/mllib-frequent-pattern-mining.md  | 13 +++++++
 docs/mllib-isotonic-regression.md      |  6 ++++
 docs/mllib-linear-methods.md           | 18 ++++++++++
 docs/mllib-naive-bayes.md              |  6 ++++
 docs/mllib-optimization.md             |  4 +++
 docs/mllib-pmml-model-export.md        |  2 ++
 docs/mllib-statistics.md               | 34 +++++++++++++++++++
 15 files changed, 274 insertions(+), 30 deletions(-)

diff --git a/docs/mllib-clustering.md b/docs/mllib-clustering.md
index c2711cf82deb..8fbced6c87d9 100644
--- a/docs/mllib-clustering.md
+++ b/docs/mllib-clustering.md
@@ -4,10 +4,10 @@ title: Clustering - MLlib
 displayTitle: <a href="mllib-guide.html">MLlib</a> - Clustering
 ---
 
-Clustering is an unsupervised learning problem whereby we aim to group subsets
+[Clustering](https://en.wikipedia.org/wiki/Cluster_analysis) is an unsupervised learning problem whereby we aim to group subsets
 of entities with one another based on some notion of similarity.  Clustering is
 often used for exploratory analysis and/or as a component of a hierarchical
-supervised learning pipeline (in which distinct classifiers or regression
+[supervised learning](https://en.wikipedia.org/wiki/Supervised_learning) pipeline (in which distinct classifiers or regression
 models are trained for each cluster).
 
 MLlib supports the following models:
@@ -47,6 +47,8 @@ into two clusters. The number of desired clusters is passed to the algorithm. We
 Set Sum of Squared Error (WSSSE). You can reduce this error measure by increasing *k*. In fact the
 optimal *k* is usually one where there is an "elbow" in the WSSSE graph.
 
+Refer to the [`KMeans` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.KMeans) and [`KMeansModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.KMeansModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.clustering.{KMeans, KMeansModel}
 import org.apache.spark.mllib.linalg.Vectors
@@ -77,6 +79,8 @@ Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
 that is equivalent to the provided example in Scala is given below:
 
+Refer to the [`KMeans` Java docs](api/java/org/apache/spark/mllib/clustering/KMeans.html) and [`KMeansModel` Java docs](api/java/org/apache/spark/mllib/clustering/KMeansModel.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.*;
 import org.apache.spark.api.java.function.Function;
@@ -132,6 +136,8 @@ data into two clusters. The number of desired clusters is passed to the algorith
 Within Set Sum of Squared Error (WSSSE). You can reduce this error measure by increasing *k*. In
 fact the optimal *k* is usually one where there is an "elbow" in the WSSSE graph.
 
+Refer to the [`KMeans` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.KMeans) and [`KMeansModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.KMeansModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.clustering import KMeans, KMeansModel
 from numpy import array
@@ -184,6 +190,8 @@ In the following example after loading and parsing data, we use a
 object to cluster the data into two clusters. The number of desired clusters is passed
 to the algorithm. We then output the parameters of the mixture model.
 
+Refer to the [`GaussianMixture` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.GaussianMixture) and [`GaussianMixtureModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.GaussianMixtureModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.clustering.GaussianMixture
 import org.apache.spark.mllib.clustering.GaussianMixtureModel
@@ -216,6 +224,8 @@ Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
 that is equivalent to the provided example in Scala is given below:
 
+Refer to the [`GaussianMixture` Java docs](api/java/org/apache/spark/mllib/clustering/GaussianMixture.html) and [`GaussianMixtureModel` Java docs](api/java/org/apache/spark/mllib/clustering/GaussianMixtureModel.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.*;
 import org.apache.spark.api.java.function.Function;
@@ -268,6 +278,8 @@ In the following example after loading and parsing data, we use a
 object to cluster the data into two clusters. The number of desired clusters is passed
 to the algorithm. We then output the parameters of the mixture model.
 
+Refer to the [`GaussianMixture` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.GaussianMixture) and [`GaussianMixtureModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.GaussianMixtureModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.clustering import GaussianMixture
 from numpy import array
@@ -324,6 +336,8 @@ Calling `PowerIterationClustering.run` returns a
 [`PowerIterationClusteringModel`](api/scala/index.html#org.apache.spark.mllib.clustering.PowerIterationClusteringModel),
 which contains the computed clustering assignments.
 
+Refer to the [`PowerIterationClustering` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.PowerIterationClustering) and [`PowerIterationClusteringModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.PowerIterationClusteringModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.clustering.{PowerIterationClustering, PowerIterationClusteringModel}
 import org.apache.spark.mllib.linalg.Vectors
@@ -365,6 +379,8 @@ Calling `PowerIterationClustering.run` returns a
 [`PowerIterationClusteringModel`](api/java/org/apache/spark/mllib/clustering/PowerIterationClusteringModel.html)
 which contains the computed clustering assignments.
 
+Refer to the [`PowerIterationClustering` Java docs](api/java/org/apache/spark/mllib/clustering/PowerIterationClustering.html) and [`PowerIterationClusteringModel` Java docs](api/java/org/apache/spark/mllib/clustering/PowerIterationClusteringModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 import scala.Tuple3;
@@ -411,6 +427,8 @@ Calling `PowerIterationClustering.run` returns a
 [`PowerIterationClusteringModel`](api/python/pyspark.mllib.html#pyspark.mllib.clustering.PowerIterationClustering),
 which contains the computed clustering assignments.
 
+Refer to the [`PowerIterationClustering` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.PowerIterationClustering) and [`PowerIterationClusteringModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.PowerIterationClusteringModel) for more details on the API.
+
 {% highlight python %}
 from __future__ import print_function
 from pyspark.mllib.clustering import PowerIterationClustering, PowerIterationClusteringModel
@@ -571,6 +589,7 @@ to the algorithm. We then output the topics, represented as probability distribu
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+Refer to the [`LDA` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.LDA) and [`DistributedLDAModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.DistributedLDAModel) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.clustering.{LDA, DistributedLDAModel}
@@ -602,6 +621,8 @@ val sameModel = DistributedLDAModel.load(sc, "myLDAModel")
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`LDA` Java docs](api/java/org/apache/spark/mllib/clustering/LDA.html) and [`DistributedLDAModel` Java docs](api/java/org/apache/spark/mllib/clustering/DistributedLDAModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -666,6 +687,8 @@ public class JavaLDAExample {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`LDA` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.LDA) and [`LDAModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.LDAModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.clustering import LDA, LDAModel
 from pyspark.mllib.linalg import Vectors
@@ -730,6 +753,7 @@ This example shows how to estimate clusters on streaming data.
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
+Refer to the [`StreamingKMeans` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.StreamingKMeans) for details on the API.
 
 First we import the neccessary classes.
 
@@ -780,6 +804,8 @@ ssc.awaitTermination()
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`StreamingKMeans` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.clustering.StreamingKMeans) for more details on the API.
+
 First we import the neccessary classes.
 
 {% highlight python %}
diff --git a/docs/mllib-collaborative-filtering.md b/docs/mllib-collaborative-filtering.md
index eedc23424ad5..b3fd51dca5c9 100644
--- a/docs/mllib-collaborative-filtering.md
+++ b/docs/mllib-collaborative-filtering.md
@@ -64,6 +64,8 @@ We use the default [ALS.train()](api/scala/index.html#org.apache.spark.mllib.rec
 method which assumes ratings are explicit. We evaluate the
 recommendation model by measuring the Mean Squared Error of rating prediction.
 
+Refer to the [`ALS` Scala docs](api/scala/index.html#org.apache.spark.mllib.recommendation.ALS) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.recommendation.ALS
 import org.apache.spark.mllib.recommendation.MatrixFactorizationModel
@@ -119,6 +121,8 @@ Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
 that is equivalent to the provided example in Scala is given bellow:
 
+Refer to the [`ALS` Java docs](api/java/org/apache/spark/mllib/recommendation/ALS.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -201,6 +205,8 @@ In the following example we load rating data. Each row consists of a user, a pro
 We use the default ALS.train() method which assumes ratings are explicit. We evaluate the
 recommendation by measuring the Mean Squared Error of rating prediction.
 
+Refer to the [`ALS` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.recommendation.ALS) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.recommendation import ALS, MatrixFactorizationModel, Rating
 
diff --git a/docs/mllib-data-types.md b/docs/mllib-data-types.md
index d8c7bdc63c70..3c0c0479674d 100644
--- a/docs/mllib-data-types.md
+++ b/docs/mllib-data-types.md
@@ -33,6 +33,8 @@ implementations: [`DenseVector`](api/scala/index.html#org.apache.spark.mllib.lin
 using the factory methods implemented in
 [`Vectors`](api/scala/index.html#org.apache.spark.mllib.linalg.Vectors$) to create local vectors.
 
+Refer to the [`Vector` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.Vector) and [`Vectors` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.Vectors) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 
@@ -59,6 +61,8 @@ implementations: [`DenseVector`](api/java/org/apache/spark/mllib/linalg/DenseVec
 using the factory methods implemented in
 [`Vectors`](api/java/org/apache/spark/mllib/linalg/Vectors.html) to create local vectors.
 
+Refer to the [`Vector` Java docs](api/java/org/apache/spark/mllib/linalg/Vector.html) and [`Vectors` Java docs](api/java/org/apache/spark/mllib/linalg/Vectors.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.mllib.linalg.Vector;
 import org.apache.spark.mllib.linalg.Vectors;
@@ -86,6 +90,8 @@ and the following as sparse vectors:
 We recommend using NumPy arrays over lists for efficiency, and using the factory methods implemented
 in [`Vectors`](api/python/pyspark.mllib.html#pyspark.mllib.linalg.Vectors) to create sparse vectors.
 
+Refer to the [`Vectors` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.Vectors) for more details on the API.
+
 {% highlight python %}
 import numpy as np
 import scipy.sparse as sps
@@ -119,6 +125,8 @@ For multiclass classification, labels should be class indices starting from zero
 A labeled point is represented by the case class
 [`LabeledPoint`](api/scala/index.html#org.apache.spark.mllib.regression.LabeledPoint).
 
+Refer to the [`LabeledPoint` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.LabeledPoint) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -136,6 +144,8 @@ val neg = LabeledPoint(0.0, Vectors.sparse(3, Array(0, 2), Array(1.0, 3.0)))
 A labeled point is represented by
 [`LabeledPoint`](api/java/org/apache/spark/mllib/regression/LabeledPoint.html).
 
+Refer to the [`LabeledPoint` Java docs](api/java/org/apache/spark/mllib/regression/LabeledPoint.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.mllib.linalg.Vectors;
 import org.apache.spark.mllib.regression.LabeledPoint;
@@ -153,6 +163,8 @@ LabeledPoint neg = new LabeledPoint(0.0, Vectors.sparse(3, new int[] {0, 2}, new
 A labeled point is represented by
 [`LabeledPoint`](api/python/pyspark.mllib.html#pyspark.mllib.regression.LabeledPoint).
 
+Refer to the [`LabeledPoint` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.LabeledPoint) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.linalg import SparseVector
 from pyspark.mllib.regression import LabeledPoint
@@ -187,6 +199,8 @@ After loading, the feature indices are converted to zero-based.
 [`MLUtils.loadLibSVMFile`](api/scala/index.html#org.apache.spark.mllib.util.MLUtils$) reads training
 examples stored in LIBSVM format.
 
+Refer to the [`MLUtils` Scala docs](api/scala/index.html#org.apache.spark.mllib.util.MLUtils) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.MLUtils
@@ -200,6 +214,8 @@ val examples: RDD[LabeledPoint] = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_
 [`MLUtils.loadLibSVMFile`](api/java/org/apache/spark/mllib/util/MLUtils.html) reads training
 examples stored in LIBSVM format.
 
+Refer to the [`MLUtils` Java docs](api/java/org/apache/spark/mllib/util/MLUtils.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.mllib.regression.LabeledPoint;
 import org.apache.spark.mllib.util.MLUtils;
@@ -214,6 +230,8 @@ JavaRDD<LabeledPoint> examples =
 [`MLUtils.loadLibSVMFile`](api/python/pyspark.mllib.html#pyspark.mllib.util.MLUtils) reads training
 examples stored in LIBSVM format.
 
+Refer to the [`MLUtils` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.util.MLUtils) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.util import MLUtils
 
@@ -246,6 +264,8 @@ We recommend using the factory methods implemented
 in [`Matrices`](api/scala/index.html#org.apache.spark.mllib.linalg.Matrices$) to create local
 matrices. Remember, local matrices in MLlib are stored in column-major order.
 
+Refer to the [`Matrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.Matrix) and [`Matrices` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.Matrices) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.{Matrix, Matrices}
 
@@ -267,6 +287,8 @@ We recommend using the factory methods implemented
 in [`Matrices`](api/java/org/apache/spark/mllib/linalg/Matrices.html) to create local
 matrices. Remember, local matrices in MLlib are stored in column-major order.
 
+Refer to the [`Matrix` Java docs](api/java/org/apache/spark/mllib/linalg/Matrix.html) and [`Matrices` Java docs](api/java/org/apache/spark/mllib/linalg/Matrices.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.mllib.linalg.Matrix;
 import org.apache.spark.mllib.linalg.Matrices;
@@ -289,6 +311,8 @@ We recommend using the factory methods implemented
 in [`Matrices`](api/python/pyspark.mllib.html#pyspark.mllib.linalg.Matrices) to create local
 matrices. Remember, local matrices in MLlib are stored in column-major order.
 
+Refer to the [`Matrix` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.Matrix) and [`Matrices` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.Matrices) for more details on the API.
+
 {% highlight python %}
 import org.apache.spark.mllib.linalg.{Matrix, Matrices}
 
@@ -341,6 +365,7 @@ created from an `RDD[Vector]` instance.  Then we can compute its column summary
 [QR decomposition](https://en.wikipedia.org/wiki/QR_decomposition) is of the form A = QR where Q is an orthogonal matrix and R is an upper triangular matrix.
 For [singular value decomposition (SVD)](https://en.wikipedia.org/wiki/Singular_value_decomposition) and [principal component analysis (PCA)](https://en.wikipedia.org/wiki/Principal_component_analysis), please refer to [Dimensionality reduction](mllib-dimensionality-reduction.html).
 
+Refer to the [`RowMatrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.distributed.RowMatrix) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Vector
@@ -364,6 +389,8 @@ val qrResult = mat.tallSkinnyQR(true)
 A [`RowMatrix`](api/java/org/apache/spark/mllib/linalg/distributed/RowMatrix.html) can be
 created from a `JavaRDD<Vector>` instance.  Then we can compute its column summary statistics.
 
+Refer to the [`RowMatrix` Java docs](api/java/org/apache/spark/mllib/linalg/distributed/RowMatrix.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.mllib.linalg.Vector;
@@ -387,6 +414,8 @@ QRDecomposition<RowMatrix, Matrix> result = mat.tallSkinnyQR(true);
 A [`RowMatrix`](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed.RowMatrix) can be 
 created from an `RDD` of vectors.
 
+Refer to the [`RowMatrix` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed.RowMatrix) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.linalg.distributed import RowMatrix
 
@@ -423,6 +452,8 @@ can be created from an `RDD[IndexedRow]` instance, where
 wrapper over `(Long, Vector)`.  An `IndexedRowMatrix` can be converted to a `RowMatrix` by dropping
 its row indices.
 
+Refer to the [`IndexedRowMatrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.distributed.IndexedRowMatrix) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.distributed.{IndexedRow, IndexedRowMatrix, RowMatrix}
 
@@ -448,6 +479,8 @@ can be created from an `JavaRDD<IndexedRow>` instance, where
 wrapper over `(long, Vector)`.  An `IndexedRowMatrix` can be converted to a `RowMatrix` by dropping
 its row indices.
 
+Refer to the [`IndexedRowMatrix` Java docs](api/java/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.mllib.linalg.distributed.IndexedRow;
@@ -475,6 +508,8 @@ can be created from an `RDD` of `IndexedRow`s, where
 wrapper over `(long, vector)`.  An `IndexedRowMatrix` can be converted to a `RowMatrix` by dropping
 its row indices.
 
+Refer to the [`IndexedRowMatrix` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed.IndexedRowMatrix) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.linalg.distributed import IndexedRow, IndexedRowMatrix
 
@@ -529,6 +564,8 @@ wrapper over `(Long, Long, Double)`.  A `CoordinateMatrix` can be converted to a
 with sparse rows by calling `toIndexedRowMatrix`.  Other computations for 
 `CoordinateMatrix` are not currently supported.
 
+Refer to the [`CoordinateMatrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.distributed.CoordinateMatrix) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.distributed.{CoordinateMatrix, MatrixEntry}
 
@@ -555,6 +592,8 @@ wrapper over `(long, long, double)`.  A `CoordinateMatrix` can be converted to a
 with sparse rows by calling `toIndexedRowMatrix`. Other computations for 
 `CoordinateMatrix` are not currently supported.
 
+Refer to the [`CoordinateMatrix` Java docs](api/java/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.mllib.linalg.distributed.CoordinateMatrix;
@@ -582,6 +621,8 @@ can be created from an `RDD` of `MatrixEntry` entries, where
 wrapper over `(long, long, float)`.  A `CoordinateMatrix` can be converted to a `RowMatrix` by 
 calling `toRowMatrix`, or to an `IndexedRowMatrix` with sparse rows by calling `toIndexedRowMatrix`.
 
+Refer to the [`CoordinateMatrix` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed.CoordinateMatrix) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.linalg.distributed import CoordinateMatrix, MatrixEntry
 
@@ -631,6 +672,8 @@ most easily created from an `IndexedRowMatrix` or `CoordinateMatrix` by calling
 `toBlockMatrix` creates blocks of size 1024 x 1024 by default.
 Users may change the block size by supplying the values through `toBlockMatrix(rowsPerBlock, colsPerBlock)`.
 
+Refer to the [`BlockMatrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.distributed.BlockMatrix) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.distributed.{BlockMatrix, CoordinateMatrix, MatrixEntry}
 
@@ -656,6 +699,8 @@ most easily created from an `IndexedRowMatrix` or `CoordinateMatrix` by calling
 `toBlockMatrix` creates blocks of size 1024 x 1024 by default.
 Users may change the block size by supplying the values through `toBlockMatrix(rowsPerBlock, colsPerBlock)`.
 
+Refer to the [`BlockMatrix` Java docs](api/java/org/apache/spark/mllib/linalg/distributed/BlockMatrix.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.mllib.linalg.distributed.BlockMatrix;
@@ -683,6 +728,8 @@ A [`BlockMatrix`](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed
 can be created from an `RDD` of sub-matrix blocks, where a sub-matrix block is a 
 `((blockRowIndex, blockColIndex), sub-matrix)` tuple.
 
+Refer to the [`BlockMatrix` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.linalg.distributed.BlockMatrix) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.linalg import Matrices
 from pyspark.mllib.linalg.distributed import BlockMatrix
diff --git a/docs/mllib-decision-tree.md b/docs/mllib-decision-tree.md
index c1d0f8a6b1cd..f31c4f88936b 100644
--- a/docs/mllib-decision-tree.md
+++ b/docs/mllib-decision-tree.md
@@ -191,7 +191,9 @@ maximum tree depth of 5. The test error is calculated to measure the algorithm a
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`DecisionTree` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.DecisionTreeModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.DecisionTree
 import org.apache.spark.mllib.tree.model.DecisionTreeModel
@@ -229,7 +231,9 @@ val sameModel = DecisionTreeModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`DecisionTree` Java docs](api/java/org/apache/spark/mllib/tree/DecisionTree.html) and [`DecisionTreeModel` Java docs](api/java/org/apache/spark/mllib/tree/model/DecisionTreeModel.html) for details on the API.
+
 {% highlight java %}
 import java.util.HashMap;
 import scala.Tuple2;
@@ -291,7 +295,8 @@ DecisionTreeModel sameModel = DecisionTreeModel.load(sc.sc(), "myModelPath");
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`DecisionTree` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTreeModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.regression import LabeledPoint
@@ -335,7 +340,9 @@ depth of 5. The Mean Squared Error (MSE) is computed at the end to evaluate
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`DecisionTree` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.DecisionTreeModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.DecisionTree
 import org.apache.spark.mllib.tree.model.DecisionTreeModel
@@ -372,7 +379,9 @@ val sameModel = DecisionTreeModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`DecisionTree` Java docs](api/java/org/apache/spark/mllib/tree/DecisionTree.html) and [`DecisionTreeModel` Java docs](api/java/org/apache/spark/mllib/tree/model/DecisionTreeModel.html) for details on the API.
+
 {% highlight java %}
 import java.util.HashMap;
 import scala.Tuple2;
@@ -440,7 +449,8 @@ DecisionTreeModel sameModel = DecisionTreeModel.load(sc.sc(), "myModelPath");
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`DecisionTree` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTreeModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.regression import LabeledPoint
diff --git a/docs/mllib-dimensionality-reduction.md b/docs/mllib-dimensionality-reduction.md
index 05f51168d837..ac3526908a9f 100644
--- a/docs/mllib-dimensionality-reduction.md
+++ b/docs/mllib-dimensionality-reduction.md
@@ -62,6 +62,8 @@ MLlib provides SVD functionality to row-oriented matrices, provided in the
 
 <div class="codetabs">
 <div data-lang="scala" markdown="1">
+Refer to the [`SingularValueDecomposition` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.SingularValueDecomposition) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Matrix
 import org.apache.spark.mllib.linalg.distributed.RowMatrix
@@ -80,6 +82,8 @@ The same code applies to `IndexedRowMatrix` if `U` is defined as an
 `IndexedRowMatrix`.
 </div>
 <div data-lang="java" markdown="1">
+Refer to the [`SingularValueDecomposition` Java docs](api/java/org/apache/spark/mllib/linalg/SingularValueDecomposition.html) for details on the API.
+
 {% highlight java %}
 import java.util.LinkedList;
 
@@ -145,6 +149,8 @@ MLlib supports PCA for tall-and-skinny matrices stored in row-oriented format an
 The following code demonstrates how to compute principal components on a `RowMatrix`
 and use them to project the vectors into a low-dimensional space.
 
+Refer to the [`RowMatrix` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.distributed.RowMatrix) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Matrix
 import org.apache.spark.mllib.linalg.distributed.RowMatrix
@@ -161,6 +167,8 @@ val projected: RowMatrix = mat.multiply(pc)
 The following code demonstrates how to compute principal components on source vectors
 and use them to project the vectors into a low-dimensional space while keeping associated labels:
 
+Refer to the [`PCA` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.PCA) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.feature.PCA
@@ -182,6 +190,8 @@ The following code demonstrates how to compute principal components on a `RowMat
 and use them to project the vectors into a low-dimensional space.
 The number of columns should be small, e.g, less than 1000.
 
+Refer to the [`RowMatrix` Java docs](api/java/org/apache/spark/mllib/linalg/distributed/RowMatrix.html) for details on the API.
+
 {% highlight java %}
 import java.util.LinkedList;
 
diff --git a/docs/mllib-ensembles.md b/docs/mllib-ensembles.md
index 1e00b2083ed7..fc587298f7d2 100644
--- a/docs/mllib-ensembles.md
+++ b/docs/mllib-ensembles.md
@@ -95,7 +95,9 @@ The test error is calculated to measure the algorithm accuracy.
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`RandomForest` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.RandomForest) and [`RandomForestModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.RandomForestModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.RandomForest
 import org.apache.spark.mllib.tree.model.RandomForestModel
@@ -135,7 +137,9 @@ val sameModel = RandomForestModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`RandomForest` Java docs](api/java/org/apache/spark/mllib/tree/RandomForest.html) and [`RandomForestModel` Java docs](api/java/org/apache/spark/mllib/tree/model/RandomForestModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 import java.util.HashMap;
@@ -200,7 +204,8 @@ RandomForestModel sameModel = RandomForestModel.load(sc.sc(), "myModelPath");
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForest) and [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForestModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.tree import RandomForest, RandomForestModel
@@ -246,7 +251,9 @@ The Mean Squared Error (MSE) is computed at the end to evaluate
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`RandomForest` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.RandomForest) and [`RandomForestModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.RandomForestModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.RandomForest
 import org.apache.spark.mllib.tree.model.RandomForestModel
@@ -286,7 +293,9 @@ val sameModel = RandomForestModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`RandomForest` Java docs](api/java/org/apache/spark/mllib/tree/RandomForest.html) and [`RandomForestModel` Java docs](api/java/org/apache/spark/mllib/tree/model/RandomForestModel.html) for details on the API.
+
 {% highlight java %}
 import java.util.HashMap;
 import scala.Tuple2;
@@ -354,7 +363,8 @@ RandomForestModel sameModel = RandomForestModel.load(sc.sc(), "myModelPath");
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForest) and [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForestModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.tree import RandomForest, RandomForestModel
@@ -479,7 +489,9 @@ The test error is calculated to measure the algorithm accuracy.
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`GradientBoostedTrees` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.GradientBoostedTreesModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.GradientBoostedTrees
 import org.apache.spark.mllib.tree.configuration.BoostingStrategy
@@ -518,7 +530,9 @@ val sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`GradientBoostedTrees` Java docs](api/java/org/apache/spark/mllib/tree/GradientBoostedTrees.html) and [`GradientBoostedTreesModel` Java docs](api/java/org/apache/spark/mllib/tree/model/GradientBoostedTreesModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 import java.util.HashMap;
@@ -583,7 +597,8 @@ GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(sc.sc(), "m
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`GradientBoostedTrees` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTreesModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
@@ -627,7 +642,9 @@ The Mean Squared Error (MSE) is computed at the end to evaluate
 
 <div class="codetabs">
 
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`GradientBoostedTrees` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.GradientBoostedTreesModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.tree.GradientBoostedTrees
 import org.apache.spark.mllib.tree.configuration.BoostingStrategy
@@ -665,7 +682,9 @@ val sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`GradientBoostedTrees` Java docs](api/java/org/apache/spark/mllib/tree/GradientBoostedTrees.html) and [`GradientBoostedTreesModel` Java docs](api/java/org/apache/spark/mllib/tree/model/GradientBoostedTreesModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 import java.util.HashMap;
@@ -736,7 +755,8 @@ GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(sc.sc(), "m
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`GradientBoostedTrees` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTreesModel) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
diff --git a/docs/mllib-evaluation-metrics.md b/docs/mllib-evaluation-metrics.md
index 7066d5c97418..2270f7a34b06 100644
--- a/docs/mllib-evaluation-metrics.md
+++ b/docs/mllib-evaluation-metrics.md
@@ -102,6 +102,7 @@ The following code snippets illustrate how to load a sample dataset, train a bin
 data, and evaluate the performance of the algorithm by several binary evaluation metrics.
 
 <div data-lang="scala" markdown="1">
+Refer to the [`LogisticRegressionWithLBFGS` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS) and [`BinaryClassificationMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.BinaryClassificationMetrics) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
@@ -179,6 +180,7 @@ println("Area under ROC = " + auROC)
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`LogisticRegressionModel` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionModel.html) and [`LogisticRegressionWithLBFGS` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionWithLBFGS.html) for details on the API.
 
 {% highlight java %}
 import scala.Tuple2;
@@ -276,6 +278,7 @@ public class BinaryClassification {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`BinaryClassificationMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.BinaryClassificationMetrics) and [`LogisticRegressionWithLBFGS` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.LogisticRegressionWithLBFGS) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.classification import LogisticRegressionWithLBFGS
@@ -428,6 +431,7 @@ The following code snippets illustrate how to load a sample dataset, train a mul
 the data, and evaluate the performance of the algorithm by several multiclass classification evaluation metrics.
 
 <div data-lang="scala" markdown="1">
+Refer to the [`MulticlassMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.MulticlassMetrics) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
@@ -501,6 +505,7 @@ println(s"Weighted false positive rate: ${metrics.weightedFalsePositiveRate}")
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`MulticlassMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/MulticlassMetrics.html) for details on the API.
 
 {% highlight java %}
 import scala.Tuple2;
@@ -580,6 +585,7 @@ public class MulticlassClassification {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`MulticlassMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.MulticlassMetrics) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.classification import LogisticRegressionWithLBFGS
@@ -758,6 +764,7 @@ True classes:
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
+Refer to the [`MultilabelMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.MultilabelMetrics) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.evaluation.MultilabelMetrics
@@ -802,6 +809,7 @@ println(s"Subset accuracy = ${metrics.subsetAccuracy}")
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`MultilabelMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/MultilabelMetrics.html) for details on the API.
 
 {% highlight java %}
 import scala.Tuple2;
@@ -864,6 +872,7 @@ public class MultilabelClassification {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`MultilabelMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.MultilabelMetrics) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.evaluation import MultilabelMetrics
@@ -1016,6 +1025,7 @@ expanded world of non-positive weights are "the same as never having interacted
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
+Refer to the [`RegressionMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RegressionMetrics) and [`RankingMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RankingMetrics) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.evaluation.{RegressionMetrics, RankingMetrics}
@@ -1095,6 +1105,7 @@ println(s"R-squared = ${regressionMetrics.r2}")
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`RegressionMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RegressionMetrics.html) and [`RankingMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RankingMetrics.html) for details on the API.
 
 {% highlight java %}
 import scala.Tuple2;
@@ -1256,6 +1267,7 @@ public class Ranking {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`RegressionMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RegressionMetrics) and [`RankingMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RankingMetrics) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.recommendation import ALS, Rating
@@ -1336,6 +1348,7 @@ The following code snippets illustrate how to load a sample dataset, train a lin
 and evaluate the performance of the algorithm by several regression metrics.
 
 <div data-lang="scala" markdown="1">
+Refer to the [`RegressionMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RegressionMetrics) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -1379,6 +1392,7 @@ println(s"Explained variance = ${metrics.explainedVariance}")
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`RegressionMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RegressionMetrics.html) for details on the API.
 
 {% highlight java %}
 import scala.Tuple2;
@@ -1455,6 +1469,7 @@ public class LinearRegression {
 </div>
 
 <div data-lang="python" markdown="1">
+Refer to the [`RegressionMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RegressionMetrics) for more details on the API.
 
 {% highlight python %}
 from pyspark.mllib.regression import LabeledPoint, LinearRegressionWithSGD
diff --git a/docs/mllib-feature-extraction.md b/docs/mllib-feature-extraction.md
index 7e417ed5f37a..5bee170c61fe 100644
--- a/docs/mllib-feature-extraction.md
+++ b/docs/mllib-feature-extraction.md
@@ -56,6 +56,9 @@ and [IDF](api/scala/index.html#org.apache.spark.mllib.feature.IDF).
 `HashingTF` takes an `RDD[Iterable[_]]` as the input.
 Each record could be an iterable of strings or other types.
 
+Refer to the [`HashingTF` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.HashingTF) for details on the API.
+
+
 {% highlight scala %}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.SparkContext
@@ -103,6 +106,9 @@ and [IDF](api/python/pyspark.mllib.html#pyspark.mllib.feature.IDF).
 `HashingTF` takes an RDD of list as the input.
 Each record could be an iterable of strings or other types.
 
+
+Refer to the [`HashingTF` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.feature.HashingTF) for details on the API.
+
 {% highlight python %}
 from pyspark import SparkContext
 from pyspark.mllib.feature import HashingTF
@@ -183,7 +189,9 @@ the [text8](http://mattmahoney.net/dc/text8.zip) data and extract it to your pre
 Here we assume the extracted file is `text8` and in same directory as you run the spark shell.  
 
 <div class="codetabs">
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`Word2Vec` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.Word2Vec) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark._
 import org.apache.spark.rdd._
@@ -207,7 +215,9 @@ model.save(sc, "myModelPath")
 val sameModel = Word2VecModel.load(sc, "myModelPath")
 {% endhighlight %}
 </div>
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`Word2Vec` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.feature.Word2Vec) for more details on the API.
+
 {% highlight python %}
 from pyspark import SparkContext
 from pyspark.mllib.feature import Word2Vec
@@ -264,7 +274,9 @@ The example below demonstrates how to load a dataset in libsvm format, and stand
 so that the new features have unit standard deviation and/or zero mean.
 
 <div class="codetabs">
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`StandardScaler` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.StandardScaler) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.feature.StandardScaler
@@ -288,7 +300,9 @@ val data2 = data.map(x => (x.label, scaler2.transform(Vectors.dense(x.features.t
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`StandardScaler` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.feature.StandardScaler) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.util import MLUtils
 from pyspark.mllib.linalg import Vectors
@@ -338,7 +352,9 @@ The example below demonstrates how to load a dataset in libsvm format, and norma
 with $L^2$ norm, and $L^\infty$ norm.
 
 <div class="codetabs">
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`Normalizer` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.Normalizer) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.feature.Normalizer
@@ -358,7 +374,9 @@ val data2 = data.map(x => (x.label, normalizer2.transform(x.features)))
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`Normalizer` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.feature.Normalizer) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.util import MLUtils
 from pyspark.mllib.linalg import Vectors
@@ -532,7 +550,10 @@ v_N
 This example below demonstrates how to transform vectors using a transforming vector value.
 
 <div class="codetabs">
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+
+Refer to the [`ElementwiseProduct` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.ElementwiseProduct) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.feature.ElementwiseProduct
@@ -551,7 +572,9 @@ val transformedData2 = data.map(x => transformer.transform(x))
 {% endhighlight %}
 </div>
 
-<div data-lang="java">
+<div data-lang="java" markdown="1">
+Refer to the [`ElementwiseProduct` Java docs](api/java/org/apache/spark/mllib/feature/ElementwiseProduct.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 import org.apache.spark.api.java.JavaRDD;
@@ -580,7 +603,9 @@ JavaRDD<Vector> transformedData2 = data.map(
 {% endhighlight %}
 </div>
 
-<div data-lang="python">
+<div data-lang="python" markdown="1">
+Refer to the [`ElementwiseProduct` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.feature.ElementwiseProduct) for more details on the API.
+
 {% highlight python %}
 from pyspark import SparkContext
 from pyspark.mllib.linalg import Vectors
@@ -617,7 +642,9 @@ and use them to project the vectors into a low-dimensional space while keeping a
 for calculation a [Linear Regression]((mllib-linear-methods.html))
 
 <div class="codetabs">
-<div data-lang="scala">
+<div data-lang="scala" markdown="1">
+Refer to the [`PCA` Scala docs](api/scala/index.html#org.apache.spark.mllib.feature.PCA) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.regression.LinearRegressionWithSGD
 import org.apache.spark.mllib.regression.LabeledPoint
diff --git a/docs/mllib-frequent-pattern-mining.md b/docs/mllib-frequent-pattern-mining.md
index 4d4f5cfdc564..f749eb4f2ff4 100644
--- a/docs/mllib-frequent-pattern-mining.md
+++ b/docs/mllib-frequent-pattern-mining.md
@@ -50,6 +50,7 @@ example illustrates how to mine frequent itemsets and association rules
 Rules](mllib-frequent-pattern-mining.html#association-rules) for
 details) from `transactions`.
 
+Refer to the [`FPGrowth` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.FPGrowth) for details on the API.
 
 {% highlight scala %}
 import org.apache.spark.rdd.RDD
@@ -92,6 +93,8 @@ example illustrates how to mine frequent itemsets and association rules
 Rules](mllib-frequent-pattern-mining.html#association-rules) for
 details) from `transactions`.
 
+Refer to the [`FPGrowth` Java docs](api/java/org/apache/spark/mllib/fpm/FPGrowth.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 import java.util.List;
@@ -144,6 +147,8 @@ Calling `FPGrowth.train` with transactions returns an
 [`FPGrowthModel`](api/python/pyspark.mllib.html#pyspark.mllib.fpm.FPGrowthModel)
 that stores the frequent itemsets with their frequencies.
 
+Refer to the [`FPGrowth` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.fpm.FPGrowth) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.fpm import FPGrowth
 
@@ -170,6 +175,8 @@ for fi in result:
 implements a parallel rule generation algorithm for constructing rules
 that have a single item as the consequent.
 
+Refer to the [`AssociationRules` Scala docs](api/java/org/apache/spark/mllib/fpm/AssociationRules.html) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.mllib.fpm.AssociationRules
@@ -199,6 +206,8 @@ results.collect().foreach { rule =>
 implements a parallel rule generation algorithm for constructing rules
 that have a single item as the consequent.
 
+Refer to the [`AssociationRules` Java docs](api/java/org/apache/spark/mllib/fpm/AssociationRules.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -267,6 +276,8 @@ Calling `PrefixSpan.run` returns a
 [`PrefixSpanModel`](api/scala/index.html#org.apache.spark.mllib.fpm.PrefixSpanModel)
 that stores the frequent sequences with their frequencies.
 
+Refer to the [`PrefixSpan` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.PrefixSpan) and [`PrefixSpanModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.PrefixSpanModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.fpm.PrefixSpan
 
@@ -296,6 +307,8 @@ Calling `PrefixSpan.run` returns a
 [`PrefixSpanModel`](api/java/org/apache/spark/mllib/fpm/PrefixSpanModel.html)
 that stores the frequent sequences with their frequencies.
 
+Refer to the [`PrefixSpan` Java docs](api/java/org/apache/spark/mllib/fpm/PrefixSpan.html) and [`PrefixSpanModel` Java docs](api/java/org/apache/spark/mllib/fpm/PrefixSpanModel.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 import java.util.List;
diff --git a/docs/mllib-isotonic-regression.md b/docs/mllib-isotonic-regression.md
index 6aa881f74918..f91a697b3189 100644
--- a/docs/mllib-isotonic-regression.md
+++ b/docs/mllib-isotonic-regression.md
@@ -59,6 +59,8 @@ i.e. 4710.28,500.00. The data are split to training and testing set.
 Model is created using the training set and a mean squared error is calculated from the predicted
 labels and real labels in the test set.
 
+Refer to the [`IsotonicRegression` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.IsotonicRegression) and [`IsotonicRegressionModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.IsotonicRegressionModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.regression.{IsotonicRegression, IsotonicRegressionModel}
 
@@ -101,6 +103,8 @@ i.e. 4710.28,500.00. The data are split to training and testing set.
 Model is created using the training set and a mean squared error is calculated from the predicted
 labels and real labels in the test set.
 
+Refer to the [`IsotonicRegression` Java docs](api/java/org/apache/spark/mllib/regression/IsotonicRegression.html) and [`IsotonicRegressionModel` Java docs](api/java/org/apache/spark/mllib/regression/IsotonicRegressionModel.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaDoubleRDD;
@@ -167,6 +171,8 @@ i.e. 4710.28,500.00. The data are split to training and testing set.
 Model is created using the training set and a mean squared error is calculated from the predicted
 labels and real labels in the test set.
 
+Refer to the [`IsotonicRegression` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.IsotonicRegression) and [`IsotonicRegressionModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.IsotonicRegressionModel) for more details on the API.
+
 {% highlight python %}
 import math
 from pyspark.mllib.regression import IsotonicRegression, IsotonicRegressionModel
diff --git a/docs/mllib-linear-methods.md b/docs/mllib-linear-methods.md
index e9b2d276cd38..a3e1620c778f 100644
--- a/docs/mllib-linear-methods.md
+++ b/docs/mllib-linear-methods.md
@@ -165,6 +165,8 @@ training algorithm on this training data using a static method in the algorithm
 object, and make predictions with the resulting model to compute the training
 error.
 
+Refer to the [`SVMWithSGD` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.SVMWithSGD) and [`SVMModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.SVMModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.classification.{SVMModel, SVMWithSGD}
 import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
@@ -230,6 +232,8 @@ Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
 that is equivalent to the provided example in Scala is given bellow:
 
+Refer to the [`SVMWithSGD` Java docs](api/java/org/apache/spark/mllib/classification/SVMWithSGD.html) and [`SVMModel` Java docs](api/java/org/apache/spark/mllib/classification/SVMModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -316,6 +320,8 @@ a dependency.
 The following example shows how to load a sample dataset, build SVM model,
 and make predictions with the resulting model to compute the training error.
 
+Refer to the [`SVMWithSGD` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.SVMWithSGD) and [`SVMModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.SVMModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.classification import SVMWithSGD, SVMModel
 from pyspark.mllib.regression import LabeledPoint
@@ -395,6 +401,8 @@ test, and use
 to fit a logistic regression model.
 Then the model is evaluated against the test dataset and saved to disk.
 
+Refer to the [`LogisticRegressionWithLBFGS` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS) and [`LogisticRegressionModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.LogisticRegressionModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext
 import org.apache.spark.mllib.classification.{LogisticRegressionWithLBFGS, LogisticRegressionModel}
@@ -441,6 +449,8 @@ test, and use
 to fit a logistic regression model.
 Then the model is evaluated against the test dataset and saved to disk.
 
+Refer to the [`LogisticRegressionWithLBFGS` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionWithLBFGS.html) and [`LogisticRegressionModel` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -501,6 +511,8 @@ and make predictions with the resulting model to compute the training error.
 Note that the Python API does not yet support multiclass classification and model save/load but
 will in the future.
 
+Refer to the [`LogisticRegressionWithLBFGS` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.LogisticRegressionWithLBFGS) and [`LogisticRegressionModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.LogisticRegressionModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.classification import LogisticRegressionWithLBFGS, LogisticRegressionModel
 from pyspark.mllib.regression import LabeledPoint
@@ -558,6 +570,8 @@ The example then uses LinearRegressionWithSGD to build a simple linear model to
 values. We compute the mean squared error at the end to evaluate
 [goodness of fit](http://en.wikipedia.org/wiki/Goodness_of_fit).
 
+Refer to the [`LinearRegressionWithSGD` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.LinearRegressionWithSGD) and [`LinearRegressionModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.LinearRegressionModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.regression.LinearRegressionModel
@@ -600,6 +614,8 @@ Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a
 calling `.rdd()` on your `JavaRDD` object. The corresponding Java example to
 the Scala snippet provided, is presented bellow:
 
+Refer to the [`LinearRegressionWithSGD` Java docs](api/java/org/apache/spark/mllib/regression/LinearRegressionWithSGD.html) and [`LinearRegressionModel` Java docs](api/java/org/apache/spark/mllib/regression/LinearRegressionModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -673,6 +689,8 @@ values. We compute the mean squared error at the end to evaluate
 
 Note that the Python API does not yet support model save/load but will in the future.
 
+Refer to the [`LinearRegressionWithSGD` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.LinearRegressionWithSGD) and [`LinearRegressionModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.LinearRegressionModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.regression import LabeledPoint, LinearRegressionWithSGD, LinearRegressionModel
 
diff --git a/docs/mllib-naive-bayes.md b/docs/mllib-naive-bayes.md
index e73bd30f3a90..f4f6a10c8299 100644
--- a/docs/mllib-naive-bayes.md
+++ b/docs/mllib-naive-bayes.md
@@ -38,6 +38,8 @@ smoothing parameter `lambda` as input, an optional model type parameter (default
 [NaiveBayesModel](api/scala/index.html#org.apache.spark.mllib.classification.NaiveBayesModel), which
 can be used for evaluation and prediction.
 
+Refer to the [`NaiveBayes` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.NaiveBayes) and [`NaiveBayesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.NaiveBayesModel) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.classification.{NaiveBayes, NaiveBayesModel}
 import org.apache.spark.mllib.linalg.Vectors
@@ -73,6 +75,8 @@ optionally smoothing parameter `lambda` as input, and output a
 [NaiveBayesModel](api/java/org/apache/spark/mllib/classification/NaiveBayesModel.html), which
 can be used for evaluation and prediction.
 
+Refer to the [`NaiveBayes` Java docs](api/java/org/apache/spark/mllib/classification/NaiveBayes.html) and [`NaiveBayesModel` Java docs](api/java/org/apache/spark/mllib/classification/NaiveBayesModel.html) for details on the API.
+
 {% highlight java %}
 import scala.Tuple2;
 
@@ -118,6 +122,8 @@ used for evaluation and prediction.
 
 Note that the Python API does not yet support model save/load but will in the future.
 
+Refer to the [`NaiveBayes` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.NaiveBayes) and [`NaiveBayesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.NaiveBayesModel) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.classification import NaiveBayes, NaiveBayesModel
 from pyspark.mllib.linalg import Vectors
diff --git a/docs/mllib-optimization.md b/docs/mllib-optimization.md
index 6cabc1610a15..a3bd130ba077 100644
--- a/docs/mllib-optimization.md
+++ b/docs/mllib-optimization.md
@@ -218,6 +218,8 @@ L-BFGS optimizer.
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
+Refer to the [`LBFGS` Scala docs](api/scala/index.html#org.apache.spark.mllib.optimization.LBFGS) and [`SquaredL2Updater` Scala docs](api/scala/index.html#org.apache.spark.mllib.optimization.SquaredL2Updater) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext
 import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
@@ -278,6 +280,8 @@ println("Area under ROC = " + auROC)
 </div>
 
 <div data-lang="java" markdown="1">
+Refer to the [`LBFGS` Java docs](api/java/org/apache/spark/mllib/optimization/LBFGS.html) and [`SquaredL2Updater` Java docs](api/java/org/apache/spark/mllib/optimization/SquaredL2Updater.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 import java.util.Random;
diff --git a/docs/mllib-pmml-model-export.md b/docs/mllib-pmml-model-export.md
index 42ea2ca81f80..615287125c03 100644
--- a/docs/mllib-pmml-model-export.md
+++ b/docs/mllib-pmml-model-export.md
@@ -45,6 +45,8 @@ The table below outlines the MLlib models that can be exported to PMML and their
 <div data-lang="scala" markdown="1">
 To export a supported `model` (see table above) to PMML, simply call `model.toPMML`.
 
+Refer to the [`KMeans` Scala docs](api/scala/index.html#org.apache.spark.mllib.clustering.KMeans) and [`Vectors` Scala docs](api/scala/index.html#org.apache.spark.mllib.linalg.Vectors) for details on the API.
+
 Here a complete example of building a KMeansModel and print it out in PMML format:
 {% highlight scala %}
 import org.apache.spark.mllib.clustering.KMeans
diff --git a/docs/mllib-statistics.md b/docs/mllib-statistics.md
index 6acfc71d7b01..2c7c9ed693fd 100644
--- a/docs/mllib-statistics.md
+++ b/docs/mllib-statistics.md
@@ -38,6 +38,8 @@ available in `Statistics`.
 which contains the column-wise max, min, mean, variance, and number of nonzeros, as well as the
 total count.
 
+Refer to the [`MultivariateStatisticalSummary` Scala docs](api/scala/index.html#org.apache.spark.mllib.stat.MultivariateStatisticalSummary) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.stat.{MultivariateStatisticalSummary, Statistics}
@@ -60,6 +62,8 @@ println(summary.numNonzeros) // number of nonzeros in each column
 which contains the column-wise max, min, mean, variance, and number of nonzeros, as well as the
 total count.
 
+Refer to the [`MultivariateStatisticalSummary` Java docs](api/java/org/apache/spark/mllib/stat/MultivariateStatisticalSummary.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -86,6 +90,8 @@ System.out.println(summary.numNonzeros()); // number of nonzeros in each column
 which contains the column-wise max, min, mean, variance, and number of nonzeros, as well as the
 total count.
 
+Refer to the [`MultivariateStatisticalSummary` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.stat.MultivariateStatisticalSummary) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.stat import Statistics
 
@@ -116,6 +122,8 @@ correlation methods are currently Pearson's and Spearman's correlation.
 calculate correlations between series. Depending on the type of input, two `RDD[Double]`s or 
 an `RDD[Vector]`, the output will be a `Double` or the correlation `Matrix` respectively.
 
+Refer to the [`Statistics` Scala docs](api/scala/index.html#org.apache.spark.mllib.stat.Statistics) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext
 import org.apache.spark.mllib.linalg._
@@ -144,6 +152,8 @@ val correlMatrix: Matrix = Statistics.corr(data, "pearson")
 calculate correlations between series. Depending on the type of input, two `JavaDoubleRDD`s or 
 a `JavaRDD<Vector>`, the output will be a `Double` or the correlation `Matrix` respectively.
 
+Refer to the [`Statistics` Java docs](api/java/org/apache/spark/mllib/stat/Statistics.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaDoubleRDD;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -173,6 +183,8 @@ Matrix correlMatrix = Statistics.corr(data.rdd(), "pearson");
 calculate correlations between series. Depending on the type of input, two `RDD[Double]`s or 
 an `RDD[Vector]`, the output will be a `Double` or the correlation `Matrix` respectively.
 
+Refer to the [`Statistics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.stat.Statistics) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.stat import Statistics
 
@@ -338,6 +350,8 @@ featureTestResults.foreach { result =>
 run Pearson's chi-squared tests. The following example demonstrates how to run and interpret 
 hypothesis tests.
 
+Refer to the [`ChiSqTestResult` Java docs](api/java/org/apache/spark/mllib/stat/test/ChiSqTestResult.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -385,6 +399,8 @@ for (ChiSqTestResult result : featureTestResults) {
 run Pearson's chi-squared tests. The following example demonstrates how to run and interpret
 hypothesis tests.
 
+Refer to the [`Statistics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.stat.Statistics) for more details on the API.
+
 {% highlight python %}
 from pyspark import SparkContext
 from pyspark.mllib.linalg import Vectors, Matrices
@@ -437,6 +453,8 @@ message.
 run a 1-sample, 2-sided Kolmogorov-Smirnov test. The following example demonstrates how to run
 and interpret the hypothesis tests.
 
+Refer to the [`Statistics` Scala docs](api/scala/index.html#org.apache.spark.mllib.stat.Statistics) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.stat.Statistics
 
@@ -459,6 +477,8 @@ val testResult2 = Statistics.kolmogorovSmirnovTest(data, myCDF)
 run a 1-sample, 2-sided Kolmogorov-Smirnov test. The following example demonstrates how to run
 and interpret the hypothesis tests.
 
+Refer to the [`Statistics` Java docs](api/java/org/apache/spark/mllib/stat/Statistics.html) for details on the API.
+
 {% highlight java %}
 import java.util.Arrays;
 
@@ -483,6 +503,8 @@ System.out.println(testResult);
 run a 1-sample, 2-sided Kolmogorov-Smirnov test. The following example demonstrates how to run
 and interpret the hypothesis tests.
 
+Refer to the [`Statistics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.stat.Statistics) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.stat import Statistics
 
@@ -513,6 +535,8 @@ methods to generate random double RDDs or vector RDDs.
 The following example generates a random double RDD, whose values follows the standard normal
 distribution `N(0, 1)`, and then map it to `N(1, 4)`.
 
+Refer to the [`RandomRDDs` Scala docs](api/scala/index.html#org.apache.spark.mllib.random.RandomRDDs) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.SparkContext
 import org.apache.spark.mllib.random.RandomRDDs._
@@ -533,6 +557,8 @@ methods to generate random double RDDs or vector RDDs.
 The following example generates a random double RDD, whose values follows the standard normal
 distribution `N(0, 1)`, and then map it to `N(1, 4)`.
 
+Refer to the [`RandomRDDs` Java docs](api/java/org/apache/spark/mllib/random/RandomRDDs) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.SparkContext;
 import org.apache.spark.api.JavaDoubleRDD;
@@ -559,6 +585,8 @@ methods to generate random double RDDs or vector RDDs.
 The following example generates a random double RDD, whose values follows the standard normal
 distribution `N(0, 1)`, and then map it to `N(1, 4)`.
 
+Refer to the [`RandomRDDs` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.random.RandomRDDs) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.random import RandomRDDs
 
@@ -589,6 +617,8 @@ mean of PDFs of normal distributions centered around each of the samples.
 to compute kernel density estimates from an RDD of samples. The following example demonstrates how
 to do so.
 
+Refer to the [`KernelDensity` Scala docs](api/scala/index.html#org.apache.spark.mllib.stat.KernelDensity) for details on the API.
+
 {% highlight scala %}
 import org.apache.spark.mllib.stat.KernelDensity
 import org.apache.spark.rdd.RDD
@@ -611,6 +641,8 @@ val densities = kd.estimate(Array(-1.0, 2.0, 5.0))
 to compute kernel density estimates from an RDD of samples. The following example demonstrates how
 to do so.
 
+Refer to the [`KernelDensity` Java docs](api/java/org/apache/spark/mllib/stat/KernelDensity.html) for details on the API.
+
 {% highlight java %}
 import org.apache.spark.mllib.stat.KernelDensity;
 import org.apache.spark.rdd.RDD;
@@ -633,6 +665,8 @@ double[] densities = kd.estimate(new double[] {-1.0, 2.0, 5.0});
 to compute kernel density estimates from an RDD of samples. The following example demonstrates how
 to do so.
 
+Refer to the [`KernelDensity` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.stat.KernelDensity) for more details on the API.
+
 {% highlight python %}
 from pyspark.mllib.stat import KernelDensity
 

From f57c63d4c30d092a320c72f8c7181f2fa711ec30 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Wed, 7 Oct 2015 09:46:37 -0700
Subject: [PATCH 153/896] [SPARK-10752] [SPARKR] Implement corr() and cov in
 DataFrameStatFunctions.

Author: Sun Rui <rui.sun@intel.com>

Closes #8869 from sun-rui/SPARK-10752.
---
 R/pkg/DESCRIPTION                |   1 +
 R/pkg/NAMESPACE                  |   2 +
 R/pkg/R/DataFrame.R              |  33 +---------
 R/pkg/R/generics.R               |  10 ++-
 R/pkg/R/stats.R                  | 102 +++++++++++++++++++++++++++++++
 R/pkg/inst/tests/test_sparkSQL.R |  12 ++++
 6 files changed, 127 insertions(+), 33 deletions(-)
 create mode 100644 R/pkg/R/stats.R

diff --git a/R/pkg/DESCRIPTION b/R/pkg/DESCRIPTION
index a3a16c42a621..3d6edb70ec98 100644
--- a/R/pkg/DESCRIPTION
+++ b/R/pkg/DESCRIPTION
@@ -33,4 +33,5 @@ Collate:
     'mllib.R'
     'serialize.R'
     'sparkR.R'
+    'stats.R'
     'utils.R'
diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index c28c47daeac1..9aad35469bbb 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -27,6 +27,8 @@ exportMethods("arrange",
               "collect",
               "columns",
               "count",
+              "cov",
+              "corr",
               "crosstab",
               "describe",
               "dim",
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 14aea923fcfe..85db3a5ed370 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1828,36 +1828,6 @@ setMethod("fillna",
             dataFrame(sdf)
           })
 
-#' crosstab
-#'
-#' Computes a pair-wise frequency table of the given columns. Also known as a contingency
-#' table. The number of distinct values for each column should be less than 1e4. At most 1e6
-#' non-zero pair frequencies will be returned.
-#'
-#' @param col1 name of the first column. Distinct items will make the first item of each row.
-#' @param col2 name of the second column. Distinct items will make the column names of the output.
-#' @return a local R data.frame representing the contingency table. The first column of each row
-#'         will be the distinct values of `col1` and the column names will be the distinct values
-#'         of `col2`. The name of the first column will be `$col1_$col2`. Pairs that have no
-#'         occurrences will have zero as their counts.
-#'
-#' @rdname statfunctions
-#' @name crosstab
-#' @export
-#' @examples
-#' \dontrun{
-#' df <- jsonFile(sqlCtx, "/path/to/file.json")
-#' ct = crosstab(df, "title", "gender")
-#' }
-setMethod("crosstab",
-          signature(x = "DataFrame", col1 = "character", col2 = "character"),
-          function(x, col1, col2) {
-            statFunctions <- callJMethod(x@sdf, "stat")
-            sct <- callJMethod(statFunctions, "crosstab", col1, col2)
-            collect(dataFrame(sct))
-          })
-
-
 #' This function downloads the contents of a DataFrame into an R's data.frame.
 #' Since data.frames are held in memory, ensure that you have enough memory
 #' in your system to accommodate the contents.
@@ -1879,5 +1849,4 @@ setMethod("as.data.frame",
               stop(paste("Unused argument(s): ", paste(list(...), collapse=", ")))
             }
             collect(x)
-          }
-)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 3db41e0fe2bb..e9086fdbd18c 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -399,6 +399,14 @@ setGeneric("arrange", function(x, col, ...) { standardGeneric("arrange") })
 #' @export
 setGeneric("columns", function(x) {standardGeneric("columns") })
 
+#' @rdname statfunctions
+#' @export
+setGeneric("cov", function(x, col1, col2) {standardGeneric("cov") })
+
+#' @rdname statfunctions
+#' @export
+setGeneric("corr", function(x, col1, col2, method = "pearson") {standardGeneric("corr") })
+
 #' @rdname describe
 #' @export
 setGeneric("describe", function(x, col, ...) { standardGeneric("describe") })
@@ -986,4 +994,4 @@ setGeneric("rbind", signature = "...")
 
 #' @rdname as.data.frame
 #' @export
-setGeneric("as.data.frame")
\ No newline at end of file
+setGeneric("as.data.frame")
diff --git a/R/pkg/R/stats.R b/R/pkg/R/stats.R
new file mode 100644
index 000000000000..06382d55d086
--- /dev/null
+++ b/R/pkg/R/stats.R
@@ -0,0 +1,102 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# stats.R - Statistic functions for DataFrames.
+
+setOldClass("jobj")
+
+#' crosstab
+#'
+#' Computes a pair-wise frequency table of the given columns. Also known as a contingency
+#' table. The number of distinct values for each column should be less than 1e4. At most 1e6
+#' non-zero pair frequencies will be returned.
+#'
+#' @param col1 name of the first column. Distinct items will make the first item of each row.
+#' @param col2 name of the second column. Distinct items will make the column names of the output.
+#' @return a local R data.frame representing the contingency table. The first column of each row
+#'         will be the distinct values of `col1` and the column names will be the distinct values
+#'         of `col2`. The name of the first column will be `$col1_$col2`. Pairs that have no
+#'         occurrences will have zero as their counts.
+#'
+#' @rdname statfunctions
+#' @name crosstab
+#' @export
+#' @examples
+#' \dontrun{
+#' df <- jsonFile(sqlContext, "/path/to/file.json")
+#' ct <- crosstab(df, "title", "gender")
+#' }
+setMethod("crosstab",
+          signature(x = "DataFrame", col1 = "character", col2 = "character"),
+          function(x, col1, col2) {
+            statFunctions <- callJMethod(x@sdf, "stat")
+            sct <- callJMethod(statFunctions, "crosstab", col1, col2)
+            collect(dataFrame(sct))
+          })
+
+#' cov
+#'
+#' Calculate the sample covariance of two numerical columns of a DataFrame.
+#'
+#' @param x A SparkSQL DataFrame
+#' @param col1 the name of the first column
+#' @param col2 the name of the second column
+#' @return the covariance of the two columns.
+#'
+#' @rdname statfunctions
+#' @name cov
+#' @export
+#' @examples
+#'\dontrun{
+#' df <- jsonFile(sqlContext, "/path/to/file.json")
+#' cov <- cov(df, "title", "gender")
+#' }
+setMethod("cov",
+          signature(x = "DataFrame", col1 = "character", col2 = "character"),
+          function(x, col1, col2) {
+            statFunctions <- callJMethod(x@sdf, "stat")
+            callJMethod(statFunctions, "cov", col1, col2)
+          })
+
+#' corr
+#'
+#' Calculates the correlation of two columns of a DataFrame.
+#' Currently only supports the Pearson Correlation Coefficient.
+#' For Spearman Correlation, consider using RDD methods found in MLlib's Statistics.
+#' 
+#' @param x A SparkSQL DataFrame
+#' @param col1 the name of the first column
+#' @param col2 the name of the second column
+#' @param method Optional. A character specifying the method for calculating the correlation.
+#'               only "pearson" is allowed now.
+#' @return The Pearson Correlation Coefficient as a Double.
+#'
+#' @rdname statfunctions
+#' @name corr
+#' @export
+#' @examples
+#'\dontrun{
+#' df <- jsonFile(sqlContext, "/path/to/file.json")
+#' corr <- corr(df, "title", "gender")
+#' corr <- corr(df, "title", "gender", method = "pearson")
+#' }
+setMethod("corr",
+          signature(x = "DataFrame", col1 = "character", col2 = "character"),
+          function(x, col1, col2, method = "pearson") {
+            statFunctions <- callJMethod(x@sdf, "stat")
+            callJMethod(statFunctions, "corr", col1, col2, method)
+          })
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index faf42b7182c3..bcf52b8fa788 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1329,6 +1329,18 @@ test_that("crosstab() on a DataFrame", {
   expect_identical(expected, ordered)
 })
 
+test_that("cov() and corr() on a DataFrame", {
+  l <- lapply(c(0:9), function(x) { list(x, x * 2.0) })
+  df <- createDataFrame(sqlContext, l, c("singles", "doubles"))
+  result <- cov(df, "singles", "doubles")
+  expect_true(abs(result - 55.0 / 3) < 1e-12)
+
+  result <- corr(df, "singles", "doubles")
+  expect_true(abs(result - 1.0) < 1e-12)
+  result <- corr(df, "singles", "doubles", "pearson")
+  expect_true(abs(result - 1.0) < 1e-12)
+})
+
 test_that("SQL error message is returned from JVM", {
   retError <- tryCatch(sql(sqlContext, "select * from blah"), error = function(e) e)
   expect_equal(grepl("Table Not Found: blah", retError), TRUE)

From 9672602c7ecb8117a1edb04067e2e3e776ee10d2 Mon Sep 17 00:00:00 2001
From: Kevin Cox <kevincox@kevincox.ca>
Date: Wed, 7 Oct 2015 09:53:17 -0700
Subject: [PATCH 154/896] [SPARK-10952] Only add hive to classpath if HIVE_HOME
 is set.

Currently if it isn't set it scans `/lib/*` and adds every dir to the
classpath which makes the env too large and every command called
afterwords fails.

Author: Kevin Cox <kevincox@kevincox.ca>

Closes #8994 from kevincox/kevincox-only-add-hive-to-classpath-if-var-is-set.
---
 build/sbt | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/build/sbt b/build/sbt
index cc3203d79bcc..7d8d0993e57d 100755
--- a/build/sbt
+++ b/build/sbt
@@ -20,10 +20,12 @@
 # When creating new tests for Spark SQL Hive, the HADOOP_CLASSPATH must contain the hive jars so
 # that we can run Hive to generate the golden answer.  This is not required for normal development
 # or testing.
-for i in "$HIVE_HOME"/lib/*
-do HADOOP_CLASSPATH="$HADOOP_CLASSPATH:$i"
-done
-export HADOOP_CLASSPATH
+if [ -n "$HIVE_HOME" ]; then
+    for i in "$HIVE_HOME"/lib/*
+    do HADOOP_CLASSPATH="$HADOOP_CLASSPATH:$i"
+    done
+    export HADOOP_CLASSPATH
+fi
 
 realpath () {
 (

From f5d154bc731aedfc2eecdb4ed6af8cac820511c9 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Wed, 7 Oct 2015 10:17:29 -0700
Subject: [PATCH 155/896] [SPARK-10966] [SQL] Codegen framework cleanup

This PR is mostly cosmetic and cleans up some warts in codegen (nearly all of which were inherited from the original quasiquote version).
 - Add lines numbers to errors (in stacktraces when debug logging is on, and always for compile fails)
 - Use a variable for input row instead of hardcoding "i" everywhere
 - rename `primitive` -> `value` (since its often actually an object)

Author: Michael Armbrust <michael@databricks.com>

Closes #9006 from marmbrus/codegen-cleanup.
---
 .../catalyst/expressions/BoundAttribute.scala |  6 +-
 .../spark/sql/catalyst/expressions/Cast.scala |  2 +-
 .../sql/catalyst/expressions/Expression.scala | 18 ++---
 .../catalyst/expressions/InputFileName.scala  |  2 +-
 .../MonotonicallyIncreasingID.scala           |  2 +-
 .../sql/catalyst/expressions/SortOrder.scala  |  6 +-
 .../expressions/SparkPartitionID.scala        |  2 +-
 .../sql/catalyst/expressions/arithmetic.scala | 62 ++++++++---------
 .../expressions/codegen/CodeGenerator.scala   | 47 ++++++++-----
 .../expressions/codegen/CodegenFallback.scala |  6 +-
 .../codegen/GenerateMutableProjection.scala   |  8 +--
 .../codegen/GenerateOrdering.scala            | 10 +--
 .../codegen/GeneratePredicate.scala           |  4 +-
 .../codegen/GenerateProjection.scala          |  4 +-
 .../codegen/GenerateSafeProjection.scala      | 14 ++--
 .../codegen/GenerateUnsafeProjection.scala    | 20 +++---
 .../expressions/collectionOperations.scala    |  4 +-
 .../expressions/complexTypeCreator.scala      | 16 ++---
 .../expressions/complexTypeExtractors.scala   |  8 +--
 .../expressions/conditionalExpressions.scala  | 36 +++++-----
 .../expressions/datetimeExpressions.scala     | 62 ++++++++---------
 .../expressions/decimalExpressions.scala      |  6 +-
 .../sql/catalyst/expressions/literals.scala   | 14 ++--
 .../expressions/mathExpressions.scala         | 68 +++++++++----------
 .../spark/sql/catalyst/expressions/misc.scala | 10 +--
 .../expressions/nullExpressions.scala         | 24 +++----
 .../sql/catalyst/expressions/predicates.scala | 34 +++++-----
 .../expressions/randomExpressions.scala       |  4 +-
 .../expressions/regexpExpressions.scala       | 24 +++----
 .../spark/sql/catalyst/expressions/sets.scala | 10 +--
 .../expressions/stringExpressions.scala       | 64 ++++++++---------
 31 files changed, 306 insertions(+), 291 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
index 473b9b787058..ff1f28ddbbf3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/BoundAttribute.scala
@@ -68,10 +68,10 @@ case class BoundReference(ordinal: Int, dataType: DataType, nullable: Boolean)
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val javaType = ctx.javaType(dataType)
-    val value = ctx.getValue("i", dataType, ordinal.toString)
+    val value = ctx.getValue(ctx.INPUT_ROW, dataType, ordinal.toString)
     s"""
-      boolean ${ev.isNull} = i.isNullAt($ordinal);
-      $javaType ${ev.primitive} = ${ev.isNull} ? ${ctx.defaultValue(dataType)} : ($value);
+      boolean ${ev.isNull} = ${ctx.INPUT_ROW}.isNullAt($ordinal);
+      $javaType ${ev.value} = ${ev.isNull} ? ${ctx.defaultValue(dataType)} : ($value);
     """
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
index f0bce388d959..99d7444dc470 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
@@ -438,7 +438,7 @@ case class Cast(child: Expression, dataType: DataType)
     val eval = child.gen(ctx)
     val nullSafeCast = nullSafeCastFunction(child.dataType, dataType, ctx)
     eval.code +
-      castCode(ctx, eval.primitive, eval.isNull, ev.primitive, ev.isNull, dataType, nullSafeCast)
+      castCode(ctx, eval.value, eval.isNull, ev.value, ev.isNull, dataType, nullSafeCast)
   }
 
   // three function arguments are: child.primitive, result.primitive and result.isNull
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
index 0b98f555a1d6..96284b9b421d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
@@ -276,7 +276,7 @@ abstract class UnaryExpression extends Expression {
       ev: GeneratedExpressionCode,
       f: String => String): String = {
     nullSafeCodeGen(ctx, ev, eval => {
-      s"${ev.primitive} = ${f(eval)};"
+      s"${ev.value} = ${f(eval)};"
     })
   }
 
@@ -292,10 +292,10 @@ abstract class UnaryExpression extends Expression {
       ev: GeneratedExpressionCode,
       f: String => String): String = {
     val eval = child.gen(ctx)
-    val resultCode = f(eval.primitive)
+    val resultCode = f(eval.value)
     eval.code + s"""
       boolean ${ev.isNull} = ${eval.isNull};
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${ev.isNull}) {
         $resultCode
       }
@@ -357,7 +357,7 @@ abstract class BinaryExpression extends Expression {
       ev: GeneratedExpressionCode,
       f: (String, String) => String): String = {
     nullSafeCodeGen(ctx, ev, (eval1, eval2) => {
-      s"${ev.primitive} = ${f(eval1, eval2)};"
+      s"${ev.value} = ${f(eval1, eval2)};"
     })
   }
 
@@ -375,11 +375,11 @@ abstract class BinaryExpression extends Expression {
       f: (String, String) => String): String = {
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
-    val resultCode = f(eval1.primitive, eval2.primitive)
+    val resultCode = f(eval1.value, eval2.value)
     s"""
       ${eval1.code}
       boolean ${ev.isNull} = ${eval1.isNull};
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${ev.isNull}) {
         ${eval2.code}
         if (!${eval2.isNull}) {
@@ -482,7 +482,7 @@ abstract class TernaryExpression extends Expression {
     ev: GeneratedExpressionCode,
     f: (String, String, String) => String): String = {
     nullSafeCodeGen(ctx, ev, (eval1, eval2, eval3) => {
-      s"${ev.primitive} = ${f(eval1, eval2, eval3)};"
+      s"${ev.value} = ${f(eval1, eval2, eval3)};"
     })
   }
 
@@ -499,11 +499,11 @@ abstract class TernaryExpression extends Expression {
     ev: GeneratedExpressionCode,
     f: (String, String, String) => String): String = {
     val evals = children.map(_.gen(ctx))
-    val resultCode = f(evals(0).primitive, evals(1).primitive, evals(2).primitive)
+    val resultCode = f(evals(0).value, evals(1).value, evals(2).value)
     s"""
       ${evals(0).code}
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${evals(0).isNull}) {
         ${evals(1).code}
         if (!${evals(1).isNull}) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
index 1e74f716955e..d809877817a5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
@@ -42,7 +42,7 @@ case class InputFileName() extends LeafExpression with Nondeterministic {
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     ev.isNull = "false"
-    s"final ${ctx.javaType(dataType)} ${ev.primitive} = " +
+    s"final ${ctx.javaType(dataType)} ${ev.value} = " +
       "org.apache.spark.rdd.SqlNewHadoopRDD.getInputFileName();"
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/MonotonicallyIncreasingID.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/MonotonicallyIncreasingID.scala
index 291b7a5bc3af..2d7679fdfe04 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/MonotonicallyIncreasingID.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/MonotonicallyIncreasingID.scala
@@ -66,7 +66,7 @@ private[sql] case class MonotonicallyIncreasingID() extends LeafExpression with
 
     ev.isNull = "false"
     s"""
-      final ${ctx.javaType(dataType)} ${ev.primitive} = $partitionMaskTerm + $countTerm;
+      final ${ctx.javaType(dataType)} ${ev.value} = $partitionMaskTerm + $countTerm;
       $countTerm++;
     """
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SortOrder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SortOrder.scala
index 98e029035ab6..290c128d65b3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SortOrder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SortOrder.scala
@@ -63,7 +63,7 @@ case class SortPrefix(child: SortOrder) extends UnaryExpression {
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val childCode = child.child.gen(ctx)
-    val input = childCode.primitive
+    val input = childCode.value
     val BinaryPrefixCmp = classOf[BinaryPrefixComparator].getName
     val DoublePrefixCmp = classOf[DoublePrefixComparator].getName
 
@@ -97,10 +97,10 @@ case class SortPrefix(child: SortOrder) extends UnaryExpression {
 
     childCode.code +
     s"""
-      |long ${ev.primitive} = ${nullValue}L;
+      |long ${ev.value} = ${nullValue}L;
       |boolean ${ev.isNull} = false;
       |if (!${childCode.isNull}) {
-      |  ${ev.primitive} = $prefixCode;
+      |  ${ev.value} = $prefixCode;
       |}
     """.stripMargin
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SparkPartitionID.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SparkPartitionID.scala
index 4b1772a2deed..8bff173d64eb 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SparkPartitionID.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SparkPartitionID.scala
@@ -47,6 +47,6 @@ private[sql] case class SparkPartitionID() extends LeafExpression with Nondeterm
     ctx.addMutableState(ctx.JAVA_INT, idTerm,
       s"$idTerm = org.apache.spark.TaskContext.getPartitionId();")
     ev.isNull = "false"
-    s"final ${ctx.javaType(dataType)} ${ev.primitive} = $idTerm;"
+    s"final ${ctx.javaType(dataType)} ${ev.value} = $idTerm;"
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
index 98464edf4d39..61a17fd7db0f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/arithmetic.scala
@@ -42,7 +42,7 @@ case class UnaryMinus(child: Expression) extends UnaryExpression with ExpectsInp
       // for example, we could not write --9223372036854775808L in code
       s"""
         ${ctx.javaType(dt)} $originValue = (${ctx.javaType(dt)})($eval);
-        ${ev.primitive} = (${ctx.javaType(dt)})(-($originValue));
+        ${ev.value} = (${ctx.javaType(dt)})(-($originValue));
       """})
     case dt: CalendarIntervalType => defineCodeGen(ctx, ev, c => s"$c.negate()")
   }
@@ -223,20 +223,20 @@ case class Divide(left: Expression, right: Expression) extends BinaryArithmetic
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
     val isZero = if (dataType.isInstanceOf[DecimalType]) {
-      s"${eval2.primitive}.isZero()"
+      s"${eval2.value}.isZero()"
     } else {
-      s"${eval2.primitive} == 0"
+      s"${eval2.value} == 0"
     }
     val javaType = ctx.javaType(dataType)
     val divide = if (dataType.isInstanceOf[DecimalType]) {
-      s"${eval1.primitive}.$decimalMethod(${eval2.primitive})"
+      s"${eval1.value}.$decimalMethod(${eval2.value})"
     } else {
-      s"($javaType)(${eval1.primitive} $symbol ${eval2.primitive})"
+      s"($javaType)(${eval1.value} $symbol ${eval2.value})"
     }
     s"""
       ${eval2.code}
       boolean ${ev.isNull} = false;
-      $javaType ${ev.primitive} = ${ctx.defaultValue(javaType)};
+      $javaType ${ev.value} = ${ctx.defaultValue(javaType)};
       if (${eval2.isNull} || $isZero) {
         ${ev.isNull} = true;
       } else {
@@ -244,7 +244,7 @@ case class Divide(left: Expression, right: Expression) extends BinaryArithmetic
         if (${eval1.isNull}) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = $divide;
+          ${ev.value} = $divide;
         }
       }
     """
@@ -285,20 +285,20 @@ case class Remainder(left: Expression, right: Expression) extends BinaryArithmet
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
     val isZero = if (dataType.isInstanceOf[DecimalType]) {
-      s"${eval2.primitive}.isZero()"
+      s"${eval2.value}.isZero()"
     } else {
-      s"${eval2.primitive} == 0"
+      s"${eval2.value} == 0"
     }
     val javaType = ctx.javaType(dataType)
     val remainder = if (dataType.isInstanceOf[DecimalType]) {
-      s"${eval1.primitive}.$decimalMethod(${eval2.primitive})"
+      s"${eval1.value}.$decimalMethod(${eval2.value})"
     } else {
-      s"($javaType)(${eval1.primitive} $symbol ${eval2.primitive})"
+      s"($javaType)(${eval1.value} $symbol ${eval2.value})"
     }
     s"""
       ${eval2.code}
       boolean ${ev.isNull} = false;
-      $javaType ${ev.primitive} = ${ctx.defaultValue(javaType)};
+      $javaType ${ev.value} = ${ctx.defaultValue(javaType)};
       if (${eval2.isNull} || $isZero) {
         ${ev.isNull} = true;
       } else {
@@ -306,7 +306,7 @@ case class Remainder(left: Expression, right: Expression) extends BinaryArithmet
         if (${eval1.isNull}) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = $remainder;
+          ${ev.value} = $remainder;
         }
       }
     """
@@ -341,24 +341,24 @@ case class MaxOf(left: Expression, right: Expression) extends BinaryArithmetic {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
-    val compCode = ctx.genComp(dataType, eval1.primitive, eval2.primitive)
+    val compCode = ctx.genComp(dataType, eval1.value, eval2.value)
 
     eval1.code + eval2.code + s"""
       boolean ${ev.isNull} = false;
-      ${ctx.javaType(left.dataType)} ${ev.primitive} =
+      ${ctx.javaType(left.dataType)} ${ev.value} =
         ${ctx.defaultValue(left.dataType)};
 
       if (${eval1.isNull}) {
         ${ev.isNull} = ${eval2.isNull};
-        ${ev.primitive} = ${eval2.primitive};
+        ${ev.value} = ${eval2.value};
       } else if (${eval2.isNull}) {
         ${ev.isNull} = ${eval1.isNull};
-        ${ev.primitive} = ${eval1.primitive};
+        ${ev.value} = ${eval1.value};
       } else {
         if ($compCode > 0) {
-          ${ev.primitive} = ${eval1.primitive};
+          ${ev.value} = ${eval1.value};
         } else {
-          ${ev.primitive} = ${eval2.primitive};
+          ${ev.value} = ${eval2.value};
         }
       }
     """
@@ -395,24 +395,24 @@ case class MinOf(left: Expression, right: Expression) extends BinaryArithmetic {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
-    val compCode = ctx.genComp(dataType, eval1.primitive, eval2.primitive)
+    val compCode = ctx.genComp(dataType, eval1.value, eval2.value)
 
     eval1.code + eval2.code + s"""
       boolean ${ev.isNull} = false;
-      ${ctx.javaType(left.dataType)} ${ev.primitive} =
+      ${ctx.javaType(left.dataType)} ${ev.value} =
         ${ctx.defaultValue(left.dataType)};
 
       if (${eval1.isNull}) {
         ${ev.isNull} = ${eval2.isNull};
-        ${ev.primitive} = ${eval2.primitive};
+        ${ev.value} = ${eval2.value};
       } else if (${eval2.isNull}) {
         ${ev.isNull} = ${eval1.isNull};
-        ${ev.primitive} = ${eval1.primitive};
+        ${ev.value} = ${eval1.value};
       } else {
         if ($compCode < 0) {
-          ${ev.primitive} = ${eval1.primitive};
+          ${ev.value} = ${eval1.value};
         } else {
-          ${ev.primitive} = ${eval2.primitive};
+          ${ev.value} = ${eval2.value};
         }
       }
     """
@@ -451,9 +451,9 @@ case class Pmod(left: Expression, right: Expression) extends BinaryArithmetic {
           s"""
             ${ctx.javaType(dataType)} r = $eval1.remainder($eval2);
             if (r.compare(new org.apache.spark.sql.types.Decimal().set(0)) < 0) {
-              ${ev.primitive} = (r.$decimalAdd($eval2)).remainder($eval2);
+              ${ev.value} = (r.$decimalAdd($eval2)).remainder($eval2);
             } else {
-              ${ev.primitive} = r;
+              ${ev.value} = r;
             }
           """
         // byte and short are casted into int when add, minus, times or divide
@@ -461,18 +461,18 @@ case class Pmod(left: Expression, right: Expression) extends BinaryArithmetic {
           s"""
             ${ctx.javaType(dataType)} r = (${ctx.javaType(dataType)})($eval1 % $eval2);
             if (r < 0) {
-              ${ev.primitive} = (${ctx.javaType(dataType)})((r + $eval2) % $eval2);
+              ${ev.value} = (${ctx.javaType(dataType)})((r + $eval2) % $eval2);
             } else {
-              ${ev.primitive} = r;
+              ${ev.value} = r;
             }
           """
         case _ =>
           s"""
             ${ctx.javaType(dataType)} r = $eval1 % $eval2;
             if (r < 0) {
-              ${ev.primitive} = (r + $eval2) % $eval2;
+              ${ev.value} = (r + $eval2) % $eval2;
             } else {
-              ${ev.primitive} = r;
+              ${ev.value} = r;
             }
           """
       }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 9a2878113304..2dd680454b4c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -42,10 +42,10 @@ class LongHashSet extends org.apache.spark.util.collection.OpenHashSet[Long]
  * @param code The sequence of statements required to evaluate the expression.
  * @param isNull A term that holds a boolean value representing whether the expression evaluated
  *                 to null.
- * @param primitive A term for a possible primitive value of the result of the evaluation. Not
- *                      valid if `isNull` is set to `true`.
+ * @param value A term for a (possibly primitive) value of the result of the evaluation. Not
+ *              valid if `isNull` is set to `true`.
  */
-case class GeneratedExpressionCode(var code: String, var isNull: String, var primitive: String)
+case class GeneratedExpressionCode(var code: String, var isNull: String, var value: String)
 
 /**
  * A context for codegen, which is used to bookkeeping the expressions those are not supported
@@ -99,6 +99,9 @@ class CodeGenContext {
   final val JAVA_FLOAT = "float"
   final val JAVA_DOUBLE = "double"
 
+  /** The variable name of the input row in generated code. */
+  final val INPUT_ROW = "i"
+
   private val curId = new java.util.concurrent.atomic.AtomicInteger()
 
   /**
@@ -112,21 +115,21 @@ class CodeGenContext {
   }
 
   /**
-   * Returns the code to access a value in `SpecializedGetters` for a given DataType.
+   * Returns the specialized code to access a value from `inputRow` at `ordinal`.
    */
-  def getValue(getter: String, dataType: DataType, ordinal: String): String = {
+  def getValue(input: String, dataType: DataType, ordinal: String): String = {
     val jt = javaType(dataType)
     dataType match {
-      case _ if isPrimitiveType(jt) => s"$getter.get${primitiveTypeName(jt)}($ordinal)"
-      case t: DecimalType => s"$getter.getDecimal($ordinal, ${t.precision}, ${t.scale})"
-      case StringType => s"$getter.getUTF8String($ordinal)"
-      case BinaryType => s"$getter.getBinary($ordinal)"
-      case CalendarIntervalType => s"$getter.getInterval($ordinal)"
-      case t: StructType => s"$getter.getStruct($ordinal, ${t.size})"
-      case _: ArrayType => s"$getter.getArray($ordinal)"
-      case _: MapType => s"$getter.getMap($ordinal)"
+      case _ if isPrimitiveType(jt) => s"$input.get${primitiveTypeName(jt)}($ordinal)"
+      case t: DecimalType => s"$input.getDecimal($ordinal, ${t.precision}, ${t.scale})"
+      case StringType => s"$input.getUTF8String($ordinal)"
+      case BinaryType => s"$input.getBinary($ordinal)"
+      case CalendarIntervalType => s"$input.getInterval($ordinal)"
+      case t: StructType => s"$input.getStruct($ordinal, ${t.size})"
+      case _: ArrayType => s"$input.getArray($ordinal)"
+      case _: MapType => s"$input.getMap($ordinal)"
       case NullType => "null"
-      case _ => s"($jt)$getter.get($ordinal, null)"
+      case _ => s"($jt)$input.get($ordinal, null)"
     }
   }
 
@@ -384,11 +387,23 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
       classOf[UnsafeMapData].getName
     ))
     evaluator.setExtendedClass(classOf[GeneratedClass])
+
+    def formatted = CodeFormatter.format(code)
+    def withLineNums = formatted.split("\n").zipWithIndex.map {
+      case (l, n) => f"${n + 1}%03d $l"
+    }.mkString("\n")
+
+    logDebug({
+      // Only add extra debugging info to byte code when we are going to print the source code.
+      evaluator.setDebuggingInformation(false, true, false)
+      withLineNums
+    })
+
     try {
-      evaluator.cook(code)
+      evaluator.cook("generated.java", code)
     } catch {
       case e: Exception =>
-        val msg = s"failed to compile: $e\n" + CodeFormatter.format(code)
+        val msg = s"failed to compile: $e\n$withLineNums"
         logError(msg, e)
         throw new Exception(msg, e)
     }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
index 3492d2c6189e..d51a8dede7f3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
@@ -34,11 +34,11 @@ trait CodegenFallback extends Expression {
     val objectTerm = ctx.freshName("obj")
     s"""
       /* expression: ${this} */
-      Object $objectTerm = expressions[${ctx.references.size - 1}].eval(i);
+      Object $objectTerm = expressions[${ctx.references.size - 1}].eval(${ctx.INPUT_ROW});
       boolean ${ev.isNull} = $objectTerm == null;
-      ${ctx.javaType(this.dataType)} ${ev.primitive} = ${ctx.defaultValue(this.dataType)};
+      ${ctx.javaType(this.dataType)} ${ev.value} = ${ctx.defaultValue(this.dataType)};
       if (!${ev.isNull}) {
-        ${ev.primitive} = (${ctx.boxedType(this.dataType)}) $objectTerm;
+        ${ev.value} = (${ctx.boxedType(this.dataType)}) $objectTerm;
       }
     """
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
index 793023b9fbed..d82d19185be0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
@@ -49,7 +49,7 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
             if (${evaluationCode.isNull}) {
               ${ctx.setColumn("mutableRow", e.dataType, i, null)};
             } else {
-              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.primitive)};
+              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.value)};
             }
           """
         } else {
@@ -58,12 +58,12 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
             if (${evaluationCode.isNull}) {
               mutableRow.setNullAt($i);
             } else {
-              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.primitive)};
+              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.value)};
             }
           """
         }
     }
-    val allProjections = ctx.splitExpressions("i", projectionCodes)
+    val allProjections = ctx.splitExpressions(ctx.INPUT_ROW, projectionCodes)
 
     val code = s"""
       public Object generate($exprType[] expr) {
@@ -94,7 +94,7 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
         }
 
         public Object apply(Object _i) {
-          InternalRow i = (InternalRow) _i;
+          InternalRow ${ctx.INPUT_ROW} = (InternalRow) _i;
           $allProjections
           return mutableRow;
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
index 42be394c3bf5..c2b420286f75 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
@@ -74,21 +74,21 @@ object GenerateOrdering extends CodeGenerator[Seq[SortOrder], Ordering[InternalR
       val isNullB = ctx.freshName("isNullB")
       val primitiveB = ctx.freshName("primitiveB")
       s"""
-          i = a;
+          ${ctx.INPUT_ROW} = a;
           boolean $isNullA;
           ${ctx.javaType(order.child.dataType)} $primitiveA;
           {
             ${eval.code}
             $isNullA = ${eval.isNull};
-            $primitiveA = ${eval.primitive};
+            $primitiveA = ${eval.value};
           }
-          i = b;
+          ${ctx.INPUT_ROW} = b;
           boolean $isNullB;
           ${ctx.javaType(order.child.dataType)} $primitiveB;
           {
             ${eval.code}
             $isNullB = ${eval.isNull};
-            $primitiveB = ${eval.primitive};
+            $primitiveB = ${eval.value};
           }
           if ($isNullA && $isNullB) {
             // Nothing
@@ -128,7 +128,7 @@ object GenerateOrdering extends CodeGenerator[Seq[SortOrder], Ordering[InternalR
 
         @Override
         public int compare(InternalRow a, InternalRow b) {
-          InternalRow i = null;  // Holds current row being evaluated.
+          InternalRow ${ctx.INPUT_ROW} = null;  // Holds current row being evaluated.
           $comparisons
           return 0;
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
index c7e718a52642..ae6ffe6293c5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
@@ -56,9 +56,9 @@ object GeneratePredicate extends CodeGenerator[Expression, (InternalRow) => Bool
         }
 
         @Override
-        public boolean eval(InternalRow i) {
+        public boolean eval(InternalRow ${ctx.INPUT_ROW}) {
           ${eval.code}
-          return !${eval.isNull} && ${eval.primitive};
+          return !${eval.isNull} && ${eval.value};
         }
       }"""
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
index 75524b568d68..dbcc9dc08408 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
@@ -59,7 +59,7 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
           ${eval.code}
           nullBits[$i] = ${eval.isNull};
           if (!${eval.isNull}) {
-            c$i = ${eval.primitive};
+            c$i = ${eval.value};
           }
         }
         """
@@ -180,7 +180,7 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
 
         $columns
 
-        public SpecificRow(InternalRow i) {
+        public SpecificRow(InternalRow ${ctx.INPUT_ROW}) {
           $initColumns
         }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index 7ad352d7ce3e..ea09e029da90 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -51,7 +51,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
       s"""
         if (!$tmp.isNullAt($i)) {
           ${converter.code}
-          $values[$i] = ${converter.primitive};
+          $values[$i] = ${converter.value};
         }
       """
     }
@@ -85,7 +85,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
       for (int $index = 0; $index < $numElements; $index++) {
         if (!$tmp.isNullAt($index)) {
           ${elementConverter.code}
-          $values[$index] = ${elementConverter.primitive};
+          $values[$index] = ${elementConverter.value};
         }
       }
       final ArrayData $output = new $arrayClass($values);
@@ -109,7 +109,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
       final MapData $tmp = $input;
       ${keyConverter.code}
       ${valueConverter.code}
-      final MapData $output = new $mapClass(${keyConverter.primitive}, ${valueConverter.primitive});
+      final MapData $output = new $mapClass(${keyConverter.value}, ${valueConverter.value});
     """
 
     GeneratedExpressionCode(code, "false", output)
@@ -133,18 +133,18 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
       case (NoOp, _) => ""
       case (e, i) =>
         val evaluationCode = e.gen(ctx)
-        val converter = convertToSafe(ctx, evaluationCode.primitive, e.dataType)
+        val converter = convertToSafe(ctx, evaluationCode.value, e.dataType)
         evaluationCode.code +
           s"""
             if (${evaluationCode.isNull}) {
               mutableRow.setNullAt($i);
             } else {
               ${converter.code}
-              ${ctx.setColumn("mutableRow", e.dataType, i, converter.primitive)};
+              ${ctx.setColumn("mutableRow", e.dataType, i, converter.value)};
             }
           """
     }
-    val allExpressions = ctx.splitExpressions("i", expressionCodes)
+    val allExpressions = ctx.splitExpressions(ctx.INPUT_ROW, expressionCodes)
     val code = s"""
       public Object generate($exprType[] expr) {
         return new SpecificSafeProjection(expr);
@@ -164,7 +164,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
         }
 
         public Object apply(Object _i) {
-          InternalRow i = (InternalRow) _i;
+          InternalRow ${ctx.INPUT_ROW} = (InternalRow) _i;
           $allExpressions
           return mutableRow;
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 8e58cb9ad1e5..3e0e81733fb1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -93,7 +93,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
               // Remember the current cursor so that we can calculate how many bytes are
               // written later.
               final int $tmpCursor = $bufferHolder.cursor;
-              ${writeStructToBuffer(ctx, input.primitive, t.map(_.dataType), bufferHolder)}
+              ${writeStructToBuffer(ctx, input.value, t.map(_.dataType), bufferHolder)}
               $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
             """
 
@@ -102,7 +102,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
               // Remember the current cursor so that we can calculate how many bytes are
               // written later.
               final int $tmpCursor = $bufferHolder.cursor;
-              ${writeArrayToBuffer(ctx, input.primitive, et, bufferHolder)}
+              ${writeArrayToBuffer(ctx, input.value, et, bufferHolder)}
               $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
               $rowWriter.alignToWords($bufferHolder.cursor - $tmpCursor);
             """
@@ -112,7 +112,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
               // Remember the current cursor so that we can calculate how many bytes are
               // written later.
               final int $tmpCursor = $bufferHolder.cursor;
-              ${writeMapToBuffer(ctx, input.primitive, kt, vt, bufferHolder)}
+              ${writeMapToBuffer(ctx, input.value, kt, vt, bufferHolder)}
               $rowWriter.setOffsetAndSize($index, $tmpCursor, $bufferHolder.cursor - $tmpCursor);
               $rowWriter.alignToWords($bufferHolder.cursor - $tmpCursor);
             """
@@ -122,19 +122,19 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
             s"""
               final long $fieldOffset = $rowWriter.getFieldOffset($index);
               Platform.putLong($bufferHolder.buffer, $fieldOffset, 0L);
-              ${writePrimitiveType(ctx, input.primitive, dt, s"$bufferHolder.buffer", fieldOffset)}
+              ${writePrimitiveType(ctx, input.value, dt, s"$bufferHolder.buffer", fieldOffset)}
             """
 
           case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
-            s"$rowWriter.writeCompactDecimal($index, ${input.primitive}, " +
+            s"$rowWriter.writeCompactDecimal($index, ${input.value}, " +
               s"${t.precision}, ${t.scale});"
 
           case t: DecimalType =>
-            s"$rowWriter.write($index, ${input.primitive}, ${t.precision}, ${t.scale});"
+            s"$rowWriter.write($index, ${input.value}, ${t.precision}, ${t.scale});"
 
           case NullType => ""
 
-          case _ => s"$rowWriter.write($index, ${input.primitive});"
+          case _ => s"$rowWriter.write($index, ${input.value});"
         }
 
         s"""
@@ -324,7 +324,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     val code =
       s"""
         $bufferHolder.reset();
-        ${writeExpressionsToBuffer(ctx, "i", exprEvals, exprTypes, bufferHolder)}
+        ${writeExpressionsToBuffer(ctx, ctx.INPUT_ROW, exprEvals, exprTypes, bufferHolder)}
         $result.pointTo($bufferHolder.buffer, ${expressions.length}, $bufferHolder.totalSize());
       """
     GeneratedExpressionCode(code, "false", result)
@@ -363,9 +363,9 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
           return apply((InternalRow) row);
         }
 
-        public UnsafeRow apply(InternalRow i) {
+        public UnsafeRow apply(InternalRow ${ctx.INPUT_ROW}) {
           ${eval.code}
-          return ${eval.primitive};
+          return ${eval.value};
         }
       }
       """
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
index 7b8c5b723ded..75c66bc271fe 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
@@ -35,7 +35,7 @@ case class Size(child: Expression) extends UnaryExpression with ExpectsInputType
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    nullSafeCodeGen(ctx, ev, c => s"${ev.primitive} = ($c).numElements();")
+    nullSafeCodeGen(ctx, ev, c => s"${ev.value} = ($c).numElements();")
   }
 }
 
@@ -173,7 +173,7 @@ case class ArrayContains(left: Expression, right: Expression)
           ${ev.isNull} = true;
         } else if (${ctx.genEqual(right.dataType, value, getValue)}) {
           ${ev.isNull} = false;
-          ${ev.primitive} = true;
+          ${ev.value} = true;
           break;
         }
       }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
index 82eab5fb3d03..a5f02e2463ae 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
@@ -59,11 +59,11 @@ case class CreateArray(children: Seq[Expression]) extends Expression {
           if (${eval.isNull}) {
             $values[$i] = null;
           } else {
-            $values[$i] = ${eval.primitive};
+            $values[$i] = ${eval.value};
           }
          """
       }.mkString("\n") +
-      s"final ArrayData ${ev.primitive} = new $arrayClass($values);"
+      s"final ArrayData ${ev.value} = new $arrayClass($values);"
   }
 
   override def prettyName: String = "array"
@@ -107,11 +107,11 @@ case class CreateStruct(children: Seq[Expression]) extends Expression {
           if (${eval.isNull}) {
             $values[$i] = null;
           } else {
-            $values[$i] = ${eval.primitive};
+            $values[$i] = ${eval.value};
           }
          """
       }.mkString("\n") +
-      s"final InternalRow ${ev.primitive} = new $rowClass($values);"
+      s"final InternalRow ${ev.value} = new $rowClass($values);"
   }
 
   override def prettyName: String = "struct"
@@ -176,11 +176,11 @@ case class CreateNamedStruct(children: Seq[Expression]) extends Expression {
           if (${eval.isNull}) {
             $values[$i] = null;
           } else {
-            $values[$i] = ${eval.primitive};
+            $values[$i] = ${eval.value};
           }
          """
       }.mkString("\n") +
-      s"final InternalRow ${ev.primitive} = new $rowClass($values);"
+      s"final InternalRow ${ev.value} = new $rowClass($values);"
   }
 
   override def prettyName: String = "named_struct"
@@ -218,7 +218,7 @@ case class CreateStructUnsafe(children: Seq[Expression]) extends Expression {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval = GenerateUnsafeProjection.createCode(ctx, children)
     ev.isNull = eval.isNull
-    ev.primitive = eval.primitive
+    ev.value = eval.value
     eval.code
   }
 
@@ -258,7 +258,7 @@ case class CreateNamedStructUnsafe(children: Seq[Expression]) extends Expression
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval = GenerateUnsafeProjection.createCode(ctx, valExprs)
     ev.isNull = eval.isNull
-    ev.primitive = eval.primitive
+    ev.value = eval.value
     eval.code
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
index 9927da21b052..a2b5a6a58090 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
@@ -113,7 +113,7 @@ case class GetStructField(child: Expression, field: StructField, ordinal: Int)
         if ($eval.isNullAt($ordinal)) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = ${ctx.getValue(eval, dataType, ordinal.toString)};
+          ${ev.value} = ${ctx.getValue(eval, dataType, ordinal.toString)};
         }
       """
     })
@@ -175,7 +175,7 @@ case class GetArrayStructFields(
             }
           }
         }
-        ${ev.primitive} = new $arrayClass(values);
+        ${ev.value} = new $arrayClass(values);
       """
     })
   }
@@ -219,7 +219,7 @@ case class GetArrayItem(child: Expression, ordinal: Expression)
         if (index >= $eval1.numElements() || index < 0) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = ${ctx.getValue(eval1, dataType, "index")};
+          ${ev.value} = ${ctx.getValue(eval1, dataType, "index")};
         }
       """
     })
@@ -295,7 +295,7 @@ case class GetMapValue(child: Expression, key: Expression)
         }
 
         if ($found) {
-          ${ev.primitive} = ${ctx.getValue(eval1 + ".valueArray()", dataType, index)};
+          ${ev.value} = ${ctx.getValue(eval1 + ".valueArray()", dataType, index)};
         } else {
           ${ev.isNull} = true;
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
index d51f3d3cef58..d532629984be 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
@@ -60,15 +60,15 @@ case class If(predicate: Expression, trueValue: Expression, falseValue: Expressi
     s"""
       ${condEval.code}
       boolean ${ev.isNull} = false;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
-      if (!${condEval.isNull} && ${condEval.primitive}) {
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      if (!${condEval.isNull} && ${condEval.value}) {
         ${trueEval.code}
         ${ev.isNull} = ${trueEval.isNull};
-        ${ev.primitive} = ${trueEval.primitive};
+        ${ev.value} = ${trueEval.value};
       } else {
         ${falseEval.code}
         ${ev.isNull} = ${falseEval.isNull};
-        ${ev.primitive} = ${falseEval.primitive};
+        ${ev.value} = ${falseEval.value};
       }
     """
   }
@@ -166,11 +166,11 @@ case class CaseWhen(branches: Seq[Expression]) extends CaseWhenLike {
       s"""
         if (!$got) {
           ${cond.code}
-          if (!${cond.isNull} && ${cond.primitive}) {
+          if (!${cond.isNull} && ${cond.value}) {
             $got = true;
             ${res.code}
             ${ev.isNull} = ${res.isNull};
-            ${ev.primitive} = ${res.primitive};
+            ${ev.value} = ${res.value};
           }
         }
       """
@@ -182,7 +182,7 @@ case class CaseWhen(branches: Seq[Expression]) extends CaseWhenLike {
         if (!$got) {
           ${res.code}
           ${ev.isNull} = ${res.isNull};
-          ${ev.primitive} = ${res.primitive};
+          ${ev.value} = ${res.value};
         }
       """
     } else {
@@ -192,7 +192,7 @@ case class CaseWhen(branches: Seq[Expression]) extends CaseWhenLike {
     s"""
       boolean $got = false;
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       $cases
       $other
     """
@@ -267,11 +267,11 @@ case class CaseKeyWhen(key: Expression, branches: Seq[Expression]) extends CaseW
       s"""
         if (!$got) {
           ${cond.code}
-          if (!${cond.isNull} && ${ctx.genEqual(key.dataType, keyEval.primitive, cond.primitive)}) {
+          if (!${cond.isNull} && ${ctx.genEqual(key.dataType, keyEval.value, cond.value)}) {
             $got = true;
             ${res.code}
             ${ev.isNull} = ${res.isNull};
-            ${ev.primitive} = ${res.primitive};
+            ${ev.value} = ${res.value};
           }
         }
       """
@@ -283,7 +283,7 @@ case class CaseKeyWhen(key: Expression, branches: Seq[Expression]) extends CaseW
         if (!$got) {
           ${res.code}
           ${ev.isNull} = ${res.isNull};
-          ${ev.primitive} = ${res.primitive};
+          ${ev.value} = ${res.value};
         }
       """
     } else {
@@ -293,7 +293,7 @@ case class CaseKeyWhen(key: Expression, branches: Seq[Expression]) extends CaseW
     s"""
       boolean $got = false;
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       ${keyEval.code}
       if (!${keyEval.isNull}) {
         $cases
@@ -351,15 +351,15 @@ case class Least(children: Seq[Expression]) extends Expression {
     def updateEval(i: Int): String =
       s"""
         if (!${evalChildren(i).isNull} && (${ev.isNull} ||
-          ${ctx.genComp(dataType, evalChildren(i).primitive, ev.primitive)} < 0)) {
+          ${ctx.genComp(dataType, evalChildren(i).value, ev.value)} < 0)) {
           ${ev.isNull} = false;
-          ${ev.primitive} = ${evalChildren(i).primitive};
+          ${ev.value} = ${evalChildren(i).value};
         }
       """
     s"""
       ${evalChildren.map(_.code).mkString("\n")}
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       ${children.indices.map(updateEval).mkString("\n")}
     """
   }
@@ -406,15 +406,15 @@ case class Greatest(children: Seq[Expression]) extends Expression {
     def updateEval(i: Int): String =
       s"""
         if (!${evalChildren(i).isNull} && (${ev.isNull} ||
-          ${ctx.genComp(dataType, evalChildren(i).primitive, ev.primitive)} > 0)) {
+          ${ctx.genComp(dataType, evalChildren(i).value, ev.value)} > 0)) {
           ${ev.isNull} = false;
-          ${ev.primitive} = ${evalChildren(i).primitive};
+          ${ev.value} = ${evalChildren(i).value};
         }
       """
     s"""
       ${evalChildren.map(_.code).mkString("\n")}
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       ${children.indices.map(updateEval).mkString("\n")}
     """
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
index 32dc9b76821b..13cc6bb6f27b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
@@ -82,7 +82,7 @@ case class DateAdd(startDate: Expression, days: Expression)
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (sd, d) => {
-      s"""${ev.primitive} = $sd + $d;"""
+      s"""${ev.value} = $sd + $d;"""
     })
   }
 }
@@ -105,7 +105,7 @@ case class DateSub(startDate: Expression, days: Expression)
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (sd, d) => {
-      s"""${ev.primitive} = $sd - $d;"""
+      s"""${ev.value} = $sd - $d;"""
     })
   }
 }
@@ -269,7 +269,7 @@ case class WeekOfYear(child: Expression) extends UnaryExpression with ImplicitCa
          """)
       s"""
         $c.setTimeInMillis($time * 1000L * 3600L * 24L);
-        ${ev.primitive} = $c.get($cal.WEEK_OF_YEAR);
+        ${ev.value} = $c.get($cal.WEEK_OF_YEAR);
       """
     })
   }
@@ -368,19 +368,19 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
         if (fString == null) {
           s"""
             boolean ${ev.isNull} = true;
-            ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+            ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           """
         } else {
           val eval1 = left.gen(ctx)
           s"""
             ${eval1.code}
             boolean ${ev.isNull} = ${eval1.isNull};
-            ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+            ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
             if (!${ev.isNull}) {
               try {
                 $sdf $formatter = new $sdf("$fString");
-                ${ev.primitive} =
-                  $formatter.parse(${eval1.primitive}.toString()).getTime() / 1000L;
+                ${ev.value} =
+                  $formatter.parse(${eval1.value}.toString()).getTime() / 1000L;
               } catch (java.lang.Throwable e) {
                 ${ev.isNull} = true;
               }
@@ -392,7 +392,7 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
         nullSafeCodeGen(ctx, ev, (string, format) => {
           s"""
             try {
-              ${ev.primitive} =
+              ${ev.value} =
                 (new $sdf($format.toString())).parse($string.toString()).getTime() / 1000L;
             } catch (java.lang.Throwable e) {
               ${ev.isNull} = true;
@@ -404,9 +404,9 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
         s"""
           ${eval1.code}
           boolean ${ev.isNull} = ${eval1.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
-            ${ev.primitive} = ${eval1.primitive} / 1000000L;
+            ${ev.value} = ${eval1.value} / 1000000L;
           }
         """
       case DateType =>
@@ -415,9 +415,9 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
         s"""
           ${eval1.code}
           boolean ${ev.isNull} = ${eval1.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
-            ${ev.primitive} = $dtu.daysToMillis(${eval1.primitive}) / 1000L;
+            ${ev.value} = $dtu.daysToMillis(${eval1.value}) / 1000L;
           }
         """
     }
@@ -477,18 +477,18 @@ case class FromUnixTime(sec: Expression, format: Expression)
       if (constFormat == null) {
         s"""
           boolean ${ev.isNull} = true;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
         """
       } else {
         val t = left.gen(ctx)
         s"""
           ${t.code}
           boolean ${ev.isNull} = ${t.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
             try {
-              ${ev.primitive} = UTF8String.fromString(new $sdf("${constFormat.toString}").format(
-                new java.util.Date(${t.primitive} * 1000L)));
+              ${ev.value} = UTF8String.fromString(new $sdf("${constFormat.toString}").format(
+                new java.util.Date(${t.value} * 1000L)));
             } catch (java.lang.Throwable e) {
               ${ev.isNull} = true;
             }
@@ -499,7 +499,7 @@ case class FromUnixTime(sec: Expression, format: Expression)
       nullSafeCodeGen(ctx, ev, (seconds, f) => {
         s"""
         try {
-          ${ev.primitive} = UTF8String.fromString((new $sdf($f.toString())).format(
+          ${ev.value} = UTF8String.fromString((new $sdf($f.toString())).format(
             new java.util.Date($seconds * 1000L)));
         } catch (java.lang.Throwable e) {
           ${ev.isNull} = true;
@@ -571,7 +571,7 @@ case class NextDay(startDate: Expression, dayOfWeek: Expression)
         } else {
           val dayOfWeekValue = DateTimeUtils.getDayOfWeekFromString(input)
           s"""
-             |${ev.primitive} = $dateTimeUtilClass.getNextDateForDayOfWeek($sd, $dayOfWeekValue);
+             |${ev.value} = $dateTimeUtilClass.getNextDateForDayOfWeek($sd, $dayOfWeekValue);
            """.stripMargin
         }
       } else {
@@ -580,7 +580,7 @@ case class NextDay(startDate: Expression, dayOfWeek: Expression)
            |if ($dayOfWeekTerm == -1) {
            |  ${ev.isNull} = true;
            |} else {
-           |  ${ev.primitive} = $dateTimeUtilClass.getNextDateForDayOfWeek($sd, $dayOfWeekTerm);
+           |  ${ev.value} = $dateTimeUtilClass.getNextDateForDayOfWeek($sd, $dayOfWeekTerm);
            |}
          """.stripMargin
       }
@@ -640,7 +640,7 @@ case class FromUTCTimestamp(left: Expression, right: Expression)
       if (tz == null) {
         s"""
            |boolean ${ev.isNull} = true;
-           |long ${ev.primitive} = 0;
+           |long ${ev.value} = 0;
          """.stripMargin
       } else {
         val tzTerm = ctx.freshName("tz")
@@ -650,10 +650,10 @@ case class FromUTCTimestamp(left: Expression, right: Expression)
         s"""
            |${eval.code}
            |boolean ${ev.isNull} = ${eval.isNull};
-           |long ${ev.primitive} = 0;
+           |long ${ev.value} = 0;
            |if (!${ev.isNull}) {
-           |  ${ev.primitive} = ${eval.primitive} +
-           |   ${tzTerm}.getOffset(${eval.primitive} / 1000) * 1000L;
+           |  ${ev.value} = ${eval.value} +
+           |   ${tzTerm}.getOffset(${eval.value} / 1000) * 1000L;
            |}
          """.stripMargin
       }
@@ -765,7 +765,7 @@ case class ToUTCTimestamp(left: Expression, right: Expression)
       if (tz == null) {
         s"""
            |boolean ${ev.isNull} = true;
-           |long ${ev.primitive} = 0;
+           |long ${ev.value} = 0;
          """.stripMargin
       } else {
         val tzTerm = ctx.freshName("tz")
@@ -775,10 +775,10 @@ case class ToUTCTimestamp(left: Expression, right: Expression)
         s"""
            |${eval.code}
            |boolean ${ev.isNull} = ${eval.isNull};
-           |long ${ev.primitive} = 0;
+           |long ${ev.value} = 0;
            |if (!${ev.isNull}) {
-           |  ${ev.primitive} = ${eval.primitive} -
-           |   ${tzTerm}.getOffset(${eval.primitive} / 1000) * 1000L;
+           |  ${ev.value} = ${eval.value} -
+           |   ${tzTerm}.getOffset(${eval.value} / 1000) * 1000L;
            |}
          """.stripMargin
       }
@@ -849,16 +849,16 @@ case class TruncDate(date: Expression, format: Expression)
       if (truncLevel == -1) {
         s"""
           boolean ${ev.isNull} = true;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
         """
       } else {
         val d = date.gen(ctx)
         s"""
           ${d.code}
           boolean ${ev.isNull} = ${d.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
-            ${ev.primitive} = $dtu.truncDate(${d.primitive}, $truncLevel);
+            ${ev.value} = $dtu.truncDate(${d.value}, $truncLevel);
           }
         """
       }
@@ -870,7 +870,7 @@ case class TruncDate(date: Expression, format: Expression)
           if ($form == -1) {
             ${ev.isNull} = true;
           } else {
-            ${ev.primitive} = $dtu.truncDate($dateVal, $form);
+            ${ev.value} = $dtu.truncDate($dateVal, $form);
           }
         """
       })
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/decimalExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/decimalExpressions.scala
index b7be12f7aa74..78f6631e4647 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/decimalExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/decimalExpressions.scala
@@ -55,8 +55,8 @@ case class MakeDecimal(child: Expression, precision: Int, scale: Int) extends Un
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, eval => {
       s"""
-        ${ev.primitive} = (new Decimal()).setOrNull($eval, $precision, $scale);
-        ${ev.isNull} = ${ev.primitive} == null;
+        ${ev.value} = (new Decimal()).setOrNull($eval, $precision, $scale);
+        ${ev.isNull} = ${ev.value} == null;
       """
     })
   }
@@ -97,7 +97,7 @@ case class CheckOverflow(child: Expression, dataType: DecimalType) extends Unary
       s"""
          | Decimal $tmp = $eval.clone();
          | if ($tmp.changePrecision(${dataType.precision}, ${dataType.scale})) {
-         |   ${ev.primitive} = $tmp;
+         |   ${ev.value} = $tmp;
          | } else {
          |   ${ev.isNull} = true;
          | }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
index 8c0c5d5b1e31..51be819e9d6f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
@@ -97,12 +97,12 @@ case class Literal protected (value: Any, dataType: DataType)
     // change the isNull and primitive to consts, to inline them
     if (value == null) {
       ev.isNull = "true"
-      s"final ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};"
+      s"final ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};"
     } else {
       dataType match {
         case BooleanType =>
           ev.isNull = "false"
-          ev.primitive = value.toString
+          ev.value = value.toString
           ""
         case FloatType =>
           val v = value.asInstanceOf[Float]
@@ -110,7 +110,7 @@ case class Literal protected (value: Any, dataType: DataType)
             super.genCode(ctx, ev)
           } else {
             ev.isNull = "false"
-            ev.primitive = s"${value}f"
+            ev.value = s"${value}f"
             ""
           }
         case DoubleType =>
@@ -119,20 +119,20 @@ case class Literal protected (value: Any, dataType: DataType)
             super.genCode(ctx, ev)
           } else {
             ev.isNull = "false"
-            ev.primitive = s"${value}D"
+            ev.value = s"${value}D"
             ""
           }
         case ByteType | ShortType =>
           ev.isNull = "false"
-          ev.primitive = s"(${ctx.javaType(dataType)})$value"
+          ev.value = s"(${ctx.javaType(dataType)})$value"
           ""
         case IntegerType | DateType =>
           ev.isNull = "false"
-          ev.primitive = value.toString
+          ev.value = value.toString
           ""
         case TimestampType | LongType =>
           ev.isNull = "false"
-          ev.primitive = s"${value}L"
+          ev.value = s"${value}L"
           ""
         // eval() version may be faster for non-primitive types
         case other =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
index 39de0e8f448d..a8164e9e29ec 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
@@ -89,7 +89,7 @@ abstract class UnaryLogExpression(f: Double => Double, name: String)
         if ($c <= $yAsymptote) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = java.lang.Math.${funcName}($c);
+          ${ev.value} = java.lang.Math.${funcName}($c);
         }
       """
     )
@@ -191,8 +191,8 @@ case class Conv(numExpr: Expression, fromBaseExpr: Expression, toBaseExpr: Expre
     val numconv = NumberConverter.getClass.getName.stripSuffix("$")
     nullSafeCodeGen(ctx, ev, (num, from, to) =>
       s"""
-       ${ev.primitive} = $numconv.convert($num.getBytes(), $from, $to);
-       if (${ev.primitive} == null) {
+       ${ev.value} = $numconv.convert($num.getBytes(), $from, $to);
+       if (${ev.value} == null) {
          ${ev.isNull} = true;
        }
        """
@@ -270,7 +270,7 @@ case class Factorial(child: Expression) extends UnaryExpression with ImplicitCas
         if ($eval > 20 || $eval < 0) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} =
+          ${ev.value} =
             org.apache.spark.sql.catalyst.expressions.Factorial.factorial($eval);
         }
       """
@@ -288,7 +288,7 @@ case class Log2(child: Expression)
         if ($c <= $yAsymptote) {
           ${ev.isNull} = true;
         } else {
-          ${ev.primitive} = java.lang.Math.log($c) / java.lang.Math.log(2);
+          ${ev.value} = java.lang.Math.log($c) / java.lang.Math.log(2);
         }
       """
     )
@@ -432,7 +432,7 @@ case class Hex(child: Expression) extends UnaryExpression with ImplicitCastInput
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (c) => {
       val hex = Hex.getClass.getName.stripSuffix("$")
-      s"${ev.primitive} = " + (child.dataType match {
+      s"${ev.value} = " + (child.dataType match {
         case StringType => s"""$hex.hex($c.getBytes());"""
         case _ => s"""$hex.hex($c);"""
       })
@@ -458,8 +458,8 @@ case class Unhex(child: Expression) extends UnaryExpression with ImplicitCastInp
     nullSafeCodeGen(ctx, ev, (c) => {
       val hex = Hex.getClass.getName.stripSuffix("$")
       s"""
-        ${ev.primitive} = $hex.unhex($c.getBytes());
-        ${ev.isNull} = ${ev.primitive} == null;
+        ${ev.value} = $hex.unhex($c.getBytes());
+        ${ev.isNull} = ${ev.value} == null;
        """
     })
   }
@@ -605,7 +605,7 @@ case class Logarithm(left: Expression, right: Expression)
           if ($c2 <= 0.0) {
             ${ev.isNull} = true;
           } else {
-            ${ev.primitive} = java.lang.Math.log($c2);
+            ${ev.value} = java.lang.Math.log($c2);
           }
         """)
     } else {
@@ -614,7 +614,7 @@ case class Logarithm(left: Expression, right: Expression)
           if ($c1 <= 0.0 || $c2 <= 0.0) {
             ${ev.isNull} = true;
           } else {
-            ${ev.primitive} = java.lang.Math.log($c2) / java.lang.Math.log($c1);
+            ${ev.value} = java.lang.Math.log($c2) / java.lang.Math.log($c1);
           }
         """)
     }
@@ -727,74 +727,74 @@ case class Round(child: Expression, scale: Expression)
     val evaluationCode = child.dataType match {
       case _: DecimalType =>
         s"""
-        if (${ce.primitive}.changePrecision(${ce.primitive}.precision(), ${_scale})) {
-          ${ev.primitive} = ${ce.primitive};
+        if (${ce.value}.changePrecision(${ce.value}.precision(), ${_scale})) {
+          ${ev.value} = ${ce.value};
         } else {
           ${ev.isNull} = true;
         }"""
       case ByteType =>
         if (_scale < 0) {
           s"""
-          ${ev.primitive} = new java.math.BigDecimal(${ce.primitive}).
+          ${ev.value} = new java.math.BigDecimal(${ce.value}).
             setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).byteValue();"""
         } else {
-          s"${ev.primitive} = ${ce.primitive};"
+          s"${ev.value} = ${ce.value};"
         }
       case ShortType =>
         if (_scale < 0) {
           s"""
-          ${ev.primitive} = new java.math.BigDecimal(${ce.primitive}).
+          ${ev.value} = new java.math.BigDecimal(${ce.value}).
             setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).shortValue();"""
         } else {
-          s"${ev.primitive} = ${ce.primitive};"
+          s"${ev.value} = ${ce.value};"
         }
       case IntegerType =>
         if (_scale < 0) {
           s"""
-          ${ev.primitive} = new java.math.BigDecimal(${ce.primitive}).
+          ${ev.value} = new java.math.BigDecimal(${ce.value}).
             setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).intValue();"""
         } else {
-          s"${ev.primitive} = ${ce.primitive};"
+          s"${ev.value} = ${ce.value};"
         }
       case LongType =>
         if (_scale < 0) {
           s"""
-          ${ev.primitive} = new java.math.BigDecimal(${ce.primitive}).
+          ${ev.value} = new java.math.BigDecimal(${ce.value}).
             setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).longValue();"""
         } else {
-          s"${ev.primitive} = ${ce.primitive};"
+          s"${ev.value} = ${ce.value};"
         }
       case FloatType => // if child eval to NaN or Infinity, just return it.
         if (_scale == 0) {
           s"""
-            if (Float.isNaN(${ce.primitive}) || Float.isInfinite(${ce.primitive})){
-              ${ev.primitive} = ${ce.primitive};
+            if (Float.isNaN(${ce.value}) || Float.isInfinite(${ce.value})){
+              ${ev.value} = ${ce.value};
             } else {
-              ${ev.primitive} = Math.round(${ce.primitive});
+              ${ev.value} = Math.round(${ce.value});
             }"""
         } else {
           s"""
-            if (Float.isNaN(${ce.primitive}) || Float.isInfinite(${ce.primitive})){
-              ${ev.primitive} = ${ce.primitive};
+            if (Float.isNaN(${ce.value}) || Float.isInfinite(${ce.value})){
+              ${ev.value} = ${ce.value};
             } else {
-              ${ev.primitive} = java.math.BigDecimal.valueOf(${ce.primitive}).
+              ${ev.value} = java.math.BigDecimal.valueOf(${ce.value}).
                 setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).floatValue();
             }"""
         }
       case DoubleType => // if child eval to NaN or Infinity, just return it.
         if (_scale == 0) {
           s"""
-            if (Double.isNaN(${ce.primitive}) || Double.isInfinite(${ce.primitive})){
-              ${ev.primitive} = ${ce.primitive};
+            if (Double.isNaN(${ce.value}) || Double.isInfinite(${ce.value})){
+              ${ev.value} = ${ce.value};
             } else {
-              ${ev.primitive} = Math.round(${ce.primitive});
+              ${ev.value} = Math.round(${ce.value});
             }"""
         } else {
           s"""
-            if (Double.isNaN(${ce.primitive}) || Double.isInfinite(${ce.primitive})){
-              ${ev.primitive} = ${ce.primitive};
+            if (Double.isNaN(${ce.value}) || Double.isInfinite(${ce.value})){
+              ${ev.value} = ${ce.value};
             } else {
-              ${ev.primitive} = java.math.BigDecimal.valueOf(${ce.primitive}).
+              ${ev.value} = java.math.BigDecimal.valueOf(${ce.value}).
                 setScale(${_scale}, java.math.BigDecimal.ROUND_HALF_UP).doubleValue();
             }"""
         }
@@ -803,13 +803,13 @@ case class Round(child: Expression, scale: Expression)
     if (scaleV == null) { // if scale is null, no need to eval its child at all
       s"""
         boolean ${ev.isNull} = true;
-        ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+        ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       """
     } else {
       s"""
         ${ce.code}
         boolean ${ev.isNull} = ${ce.isNull};
-        ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+        ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
         if (!${ev.isNull}) {
           $evaluationCode
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
index 8d8d66ddeb34..0f6d02f2e00c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala
@@ -92,18 +92,18 @@ case class Sha2(left: Expression, right: Expression)
           try {
             java.security.MessageDigest md = java.security.MessageDigest.getInstance("SHA-224");
             md.update($eval1);
-            ${ev.primitive} = UTF8String.fromBytes(md.digest());
+            ${ev.value} = UTF8String.fromBytes(md.digest());
           } catch (java.security.NoSuchAlgorithmException e) {
             ${ev.isNull} = true;
           }
         } else if ($eval2 == 256 || $eval2 == 0) {
-          ${ev.primitive} =
+          ${ev.value} =
             UTF8String.fromString($digestUtils.sha256Hex($eval1));
         } else if ($eval2 == 384) {
-          ${ev.primitive} =
+          ${ev.value} =
             UTF8String.fromString($digestUtils.sha384Hex($eval1));
         } else if ($eval2 == 512) {
-          ${ev.primitive} =
+          ${ev.value} =
             UTF8String.fromString($digestUtils.sha512Hex($eval1));
         } else {
           ${ev.isNull} = true;
@@ -155,7 +155,7 @@ case class Crc32(child: Expression) extends UnaryExpression with ImplicitCastInp
       s"""
         $CRC32 checksum = new $CRC32();
         checksum.update($value, 0, $value.length);
-        ${ev.primitive} = checksum.getValue();
+        ${ev.value} = checksum.getValue();
       """
     })
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
index 287718fab7f0..94deafb75b69 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
@@ -64,7 +64,7 @@ case class Coalesce(children: Seq[Expression]) extends Expression {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     s"""
       boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
     """ +
     children.map { e =>
       val eval = e.gen(ctx)
@@ -73,7 +73,7 @@ case class Coalesce(children: Seq[Expression]) extends Expression {
           ${eval.code}
           if (!${eval.isNull}) {
             ${ev.isNull} = false;
-            ${ev.primitive} = ${eval.primitive};
+            ${ev.value} = ${eval.value};
           }
         }
       """
@@ -111,8 +111,8 @@ case class IsNaN(child: Expression) extends UnaryExpression
         s"""
           ${eval.code}
           boolean ${ev.isNull} = false;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
-          ${ev.primitive} = !${eval.isNull} && Double.isNaN(${eval.primitive});
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+          ${ev.value} = !${eval.isNull} && Double.isNaN(${eval.value});
         """
     }
   }
@@ -152,18 +152,18 @@ case class NaNvl(left: Expression, right: Expression)
         s"""
           ${leftGen.code}
           boolean ${ev.isNull} = false;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (${leftGen.isNull}) {
             ${ev.isNull} = true;
           } else {
-            if (!Double.isNaN(${leftGen.primitive})) {
-              ${ev.primitive} = ${leftGen.primitive};
+            if (!Double.isNaN(${leftGen.value})) {
+              ${ev.value} = ${leftGen.value};
             } else {
               ${rightGen.code}
               if (${rightGen.isNull}) {
                 ${ev.isNull} = true;
               } else {
-                ${ev.primitive} = ${rightGen.primitive};
+                ${ev.value} = ${rightGen.value};
               }
             }
           }
@@ -186,7 +186,7 @@ case class IsNull(child: Expression) extends UnaryExpression with Predicate {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval = child.gen(ctx)
     ev.isNull = "false"
-    ev.primitive = eval.isNull
+    ev.value = eval.isNull
     eval.code
   }
 }
@@ -205,7 +205,7 @@ case class IsNotNull(child: Expression) extends UnaryExpression with Predicate {
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval = child.gen(ctx)
     ev.isNull = "false"
-    ev.primitive = s"(!(${eval.isNull}))"
+    ev.value = s"(!(${eval.isNull}))"
     eval.code
   }
 }
@@ -249,7 +249,7 @@ case class AtLeastNNonNulls(n: Int, children: Seq[Expression]) extends Predicate
           s"""
             if ($nonnull < $n) {
               ${eval.code}
-              if (!${eval.isNull} && !Double.isNaN(${eval.primitive})) {
+              if (!${eval.isNull} && !Double.isNaN(${eval.value})) {
                 $nonnull += 1;
               }
             }
@@ -269,7 +269,7 @@ case class AtLeastNNonNulls(n: Int, children: Seq[Expression]) extends Predicate
       int $nonnull = 0;
       $code
       boolean ${ev.isNull} = false;
-      boolean ${ev.primitive} = $nonnull >= $n;
+      boolean ${ev.value} = $nonnull >= $n;
      """
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
index daefc016bc91..68557479a959 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
@@ -148,19 +148,19 @@ case class In(value: Expression, list: Seq[Expression]) extends Predicate
     val listGen = list.map(_.gen(ctx))
     val listCode = listGen.map(x =>
       s"""
-        if (!${ev.primitive}) {
+        if (!${ev.value}) {
           ${x.code}
           if (${x.isNull}) {
             ${ev.isNull} = true;
-          } else if (${ctx.genEqual(value.dataType, valueGen.primitive, x.primitive)}) {
+          } else if (${ctx.genEqual(value.dataType, valueGen.value, x.value)}) {
             ${ev.isNull} = false;
-            ${ev.primitive} = true;
+            ${ev.value} = true;
           }
         }
        """).mkString("\n")
     s"""
       ${valueGen.code}
-      boolean ${ev.primitive} = false;
+      boolean ${ev.value} = false;
       boolean ${ev.isNull} = ${valueGen.isNull};
       if (!${ev.isNull}) {
         $listCode
@@ -208,10 +208,10 @@ case class InSet(child: Expression, hset: Set[Any]) extends UnaryExpression with
     s"""
       ${childGen.code}
       boolean ${ev.isNull} = ${childGen.isNull};
-      boolean ${ev.primitive} = false;
+      boolean ${ev.value} = false;
       if (!${ev.isNull}) {
-        ${ev.primitive} = $hsetTerm.contains(${childGen.primitive});
-        if (!${ev.primitive} && $hasNullTerm) {
+        ${ev.value} = $hsetTerm.contains(${childGen.value});
+        if (!${ev.value} && $hasNullTerm) {
           ${ev.isNull} = true;
         }
       }
@@ -251,14 +251,14 @@ case class And(left: Expression, right: Expression) extends BinaryOperator with
     s"""
       ${eval1.code}
       boolean ${ev.isNull} = false;
-      boolean ${ev.primitive} = false;
+      boolean ${ev.value} = false;
 
-      if (!${eval1.isNull} && !${eval1.primitive}) {
+      if (!${eval1.isNull} && !${eval1.value}) {
       } else {
         ${eval2.code}
-        if (!${eval2.isNull} && !${eval2.primitive}) {
+        if (!${eval2.isNull} && !${eval2.value}) {
         } else if (!${eval1.isNull} && !${eval2.isNull}) {
-          ${ev.primitive} = true;
+          ${ev.value} = true;
         } else {
           ${ev.isNull} = true;
         }
@@ -300,14 +300,14 @@ case class Or(left: Expression, right: Expression) extends BinaryOperator with P
     s"""
       ${eval1.code}
       boolean ${ev.isNull} = false;
-      boolean ${ev.primitive} = true;
+      boolean ${ev.value} = true;
 
-      if (!${eval1.isNull} && ${eval1.primitive}) {
+      if (!${eval1.isNull} && ${eval1.value}) {
       } else {
         ${eval2.code}
-        if (!${eval2.isNull} && ${eval2.primitive}) {
+        if (!${eval2.isNull} && ${eval2.value}) {
         } else if (!${eval1.isNull} && !${eval2.isNull}) {
-          ${ev.primitive} = false;
+          ${ev.value} = false;
         } else {
           ${ev.isNull} = true;
         }
@@ -403,10 +403,10 @@ case class EqualNullSafe(left: Expression, right: Expression) extends BinaryComp
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val eval1 = left.gen(ctx)
     val eval2 = right.gen(ctx)
-    val equalCode = ctx.genEqual(left.dataType, eval1.primitive, eval2.primitive)
+    val equalCode = ctx.genEqual(left.dataType, eval1.value, eval2.value)
     ev.isNull = "false"
     eval1.code + eval2.code + s"""
-        boolean ${ev.primitive} = (${eval1.isNull} && ${eval2.isNull}) ||
+        boolean ${ev.value} = (${eval1.isNull} && ${eval2.isNull}) ||
            (!${eval1.isNull} && $equalCode);
       """
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala
index 62d3d204ca87..8bde8cb9fe87 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala
@@ -69,7 +69,7 @@ case class Rand(seed: Long) extends RDG {
       s"$rngTerm = new $className(${seed}L + org.apache.spark.TaskContext.getPartitionId());")
     ev.isNull = "false"
     s"""
-      final ${ctx.javaType(dataType)} ${ev.primitive} = $rngTerm.nextDouble();
+      final ${ctx.javaType(dataType)} ${ev.value} = $rngTerm.nextDouble();
     """
   }
 }
@@ -92,7 +92,7 @@ case class Randn(seed: Long) extends RDG {
       s"$rngTerm = new $className(${seed}L + org.apache.spark.TaskContext.getPartitionId());")
     ev.isNull = "false"
     s"""
-      final ${ctx.javaType(dataType)} ${ev.primitive} = $rngTerm.nextGaussian();
+      final ${ctx.javaType(dataType)} ${ev.value} = $rngTerm.nextGaussian();
     """
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
index 6dff28a7cde4..64f15945c790 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
@@ -92,15 +92,15 @@ case class Like(left: Expression, right: Expression)
         s"""
           ${eval.code}
           boolean ${ev.isNull} = ${eval.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
-            ${ev.primitive} = $pattern.matcher(${eval.primitive}.toString()).matches();
+            ${ev.value} = $pattern.matcher(${eval.value}.toString()).matches();
           }
         """
       } else {
         s"""
           boolean ${ev.isNull} = true;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
         """
       }
     } else {
@@ -108,7 +108,7 @@ case class Like(left: Expression, right: Expression)
         s"""
           String rightStr = ${eval2}.toString();
           ${patternClass} $pattern = ${patternClass}.compile($escapeFunc(rightStr));
-          ${ev.primitive} = $pattern.matcher(${eval1}.toString()).matches();
+          ${ev.value} = $pattern.matcher(${eval1}.toString()).matches();
         """
       })
     }
@@ -140,15 +140,15 @@ case class RLike(left: Expression, right: Expression)
         s"""
           ${eval.code}
           boolean ${ev.isNull} = ${eval.isNull};
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
           if (!${ev.isNull}) {
-            ${ev.primitive} = $pattern.matcher(${eval.primitive}.toString()).find(0);
+            ${ev.value} = $pattern.matcher(${eval.value}.toString()).find(0);
           }
         """
       } else {
         s"""
           boolean ${ev.isNull} = true;
-          ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+          ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
         """
       }
     } else {
@@ -156,7 +156,7 @@ case class RLike(left: Expression, right: Expression)
         s"""
           String rightStr = ${eval2}.toString();
           ${patternClass} $pattern = ${patternClass}.compile(rightStr);
-          ${ev.primitive} = $pattern.matcher(${eval1}.toString()).find(0);
+          ${ev.value} = $pattern.matcher(${eval1}.toString()).find(0);
         """
       })
     }
@@ -184,7 +184,7 @@ case class StringSplit(str: Expression, pattern: Expression)
     val arrayClass = classOf[GenericArrayData].getName
     nullSafeCodeGen(ctx, ev, (str, pattern) =>
       // Array in java is covariant, so we don't need to cast UTF8String[] to Object[].
-      s"""${ev.primitive} = new $arrayClass($str.split($pattern, -1));""")
+      s"""${ev.value} = new $arrayClass($str.split($pattern, -1));""")
   }
 
   override def prettyName: String = "split"
@@ -275,7 +275,7 @@ case class RegExpReplace(subject: Expression, regexp: Expression, rep: Expressio
         m.appendReplacement(${termResult}, ${termLastReplacement});
       }
       m.appendTail(${termResult});
-      ${ev.primitive} = UTF8String.fromString(${termResult}.toString());
+      ${ev.value} = UTF8String.fromString(${termResult}.toString());
       ${ev.isNull} = false;
     """
     })
@@ -335,10 +335,10 @@ case class RegExpExtract(subject: Expression, regexp: Expression, idx: Expressio
         ${termPattern}.matcher($subject.toString());
       if (m.find()) {
         java.util.regex.MatchResult mr = m.toMatchResult();
-        ${ev.primitive} = UTF8String.fromString(mr.group($idx));
+        ${ev.value} = UTF8String.fromString(mr.group($idx));
         ${ev.isNull} = false;
       } else {
-        ${ev.primitive} = UTF8String.EMPTY_UTF8;
+        ${ev.value} = UTF8String.EMPTY_UTF8;
         ${ev.isNull} = false;
       }"""
     })
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala
index 5b0fe8dfe2fc..d124d29d534b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala
@@ -67,7 +67,7 @@ case class NewSet(elementType: DataType) extends LeafExpression with CodegenFall
       case IntegerType | LongType =>
         ev.isNull = "false"
         s"""
-          ${ctx.javaType(dataType)} ${ev.primitive} = new ${ctx.javaType(dataType)}();
+          ${ctx.javaType(dataType)} ${ev.value} = new ${ctx.javaType(dataType)}();
         """
       case _ => super.genCode(ctx, ev)
     }
@@ -116,10 +116,10 @@ case class AddItemToSet(item: Expression, set: Expression)
         val htype = ctx.javaType(dataType)
 
         ev.isNull = "false"
-        ev.primitive = setEval.primitive
+        ev.value = setEval.value
         itemEval.code + setEval.code +  s"""
           if (!${itemEval.isNull} && !${setEval.isNull}) {
-           (($htype)${setEval.primitive}).add(${itemEval.primitive});
+           (($htype)${setEval.value}).add(${itemEval.value});
           }
          """
       case _ => super.genCode(ctx, ev)
@@ -167,10 +167,10 @@ case class CombineSets(left: Expression, right: Expression)
         val htype = ctx.javaType(dataType)
 
         ev.isNull = leftEval.isNull
-        ev.primitive = leftEval.primitive
+        ev.value = leftEval.value
         leftEval.code + rightEval.code + s"""
           if (!${leftEval.isNull} && !${rightEval.isNull}) {
-            ${leftEval.primitive}.union((${htype})${rightEval.primitive});
+            ${leftEval.value}.union((${htype})${rightEval.value});
           }
         """
       case _ => super.genCode(ctx, ev)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
index 4ab27c044f50..abc5c94589ba 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
@@ -50,12 +50,12 @@ case class Concat(children: Seq[Expression]) extends Expression with ImplicitCas
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val evals = children.map(_.gen(ctx))
     val inputs = evals.map { eval =>
-      s"${eval.isNull} ? null : ${eval.primitive}"
+      s"${eval.isNull} ? null : ${eval.value}"
     }.mkString(", ")
     evals.map(_.code).mkString("\n") + s"""
       boolean ${ev.isNull} = false;
-      UTF8String ${ev.primitive} = UTF8String.concat($inputs);
-      if (${ev.primitive} == null) {
+      UTF8String ${ev.value} = UTF8String.concat($inputs);
+      if (${ev.value} == null) {
         ${ev.isNull} = true;
       }
     """
@@ -104,12 +104,12 @@ case class ConcatWs(children: Seq[Expression])
       val evals = children.map(_.gen(ctx))
 
       val inputs = evals.map { eval =>
-        s"${eval.isNull} ? (UTF8String) null : ${eval.primitive}"
+        s"${eval.isNull} ? (UTF8String) null : ${eval.value}"
       }.mkString(", ")
 
       evals.map(_.code).mkString("\n") + s"""
-        UTF8String ${ev.primitive} = UTF8String.concatWs($inputs);
-        boolean ${ev.isNull} = ${ev.primitive} == null;
+        UTF8String ${ev.value} = UTF8String.concatWs($inputs);
+        boolean ${ev.isNull} = ${ev.value} == null;
       """
     } else {
       val array = ctx.freshName("array")
@@ -121,19 +121,19 @@ case class ConcatWs(children: Seq[Expression])
         child.dataType match {
           case StringType =>
             ("", // we count all the StringType arguments num at once below.
-              s"$array[$idxInVararg ++] = ${eval.isNull} ? (UTF8String) null : ${eval.primitive};")
+              s"$array[$idxInVararg ++] = ${eval.isNull} ? (UTF8String) null : ${eval.value};")
           case _: ArrayType =>
             val size = ctx.freshName("n")
             (s"""
               if (!${eval.isNull}) {
-                $varargNum += ${eval.primitive}.numElements();
+                $varargNum += ${eval.value}.numElements();
               }
             """,
             s"""
             if (!${eval.isNull}) {
-              final int $size = ${eval.primitive}.numElements();
+              final int $size = ${eval.value}.numElements();
               for (int j = 0; j < $size; j ++) {
-                $array[$idxInVararg ++] = ${ctx.getValue(eval.primitive, StringType, "j")};
+                $array[$idxInVararg ++] = ${ctx.getValue(eval.value, StringType, "j")};
               }
             }
             """)
@@ -147,8 +147,8 @@ case class ConcatWs(children: Seq[Expression])
         ${varargCount.mkString("\n")}
         UTF8String[] $array = new UTF8String[$varargNum];
         ${varargBuild.mkString("\n")}
-        UTF8String ${ev.primitive} = UTF8String.concatWs(${evals.head.primitive}, $array);
-        boolean ${ev.isNull} = ${ev.primitive} == null;
+        UTF8String ${ev.value} = UTF8String.concatWs(${evals.head.value}, $array);
+        boolean ${ev.isNull} = ${ev.value} == null;
       """
     }
   }
@@ -308,7 +308,7 @@ case class StringTranslate(srcExpr: Expression, matchingExpr: Expression, replac
         ${termDict} = org.apache.spark.sql.catalyst.expressions.StringTranslate
           .buildDict(${termLastMatching}, ${termLastReplace});
       }
-      ${ev.primitive} = ${src}.translate(${termDict});
+      ${ev.value} = ${src}.translate(${termDict});
       """
     })
   }
@@ -334,7 +334,7 @@ case class FindInSet(left: Expression, right: Expression) extends BinaryExpressi
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (word, set) =>
-      s"${ev.primitive} = $set.findInSet($word);"
+      s"${ev.value} = $set.findInSet($word);"
     )
   }
 
@@ -481,7 +481,7 @@ case class StringLocate(substr: Expression, str: Expression, start: Expression)
     val strGen = str.gen(ctx)
     val startGen = start.gen(ctx)
     s"""
-      int ${ev.primitive} = 0;
+      int ${ev.value} = 0;
       boolean ${ev.isNull} = false;
       ${startGen.code}
       if (!${startGen.isNull}) {
@@ -489,8 +489,8 @@ case class StringLocate(substr: Expression, str: Expression, start: Expression)
         if (!${substrGen.isNull}) {
           ${strGen.code}
           if (!${strGen.isNull}) {
-            ${ev.primitive} = ${strGen.primitive}.indexOf(${substrGen.primitive},
-              ${startGen.primitive}) + 1;
+            ${ev.value} = ${strGen.value}.indexOf(${substrGen.value},
+              ${startGen.value}) + 1;
           } else {
             ${ev.isNull} = true;
           }
@@ -586,9 +586,9 @@ case class FormatString(children: Expression*) extends Expression with ImplicitC
         if (ctx.boxedType(v._1) != ctx.javaType(v._1)) {
           // Java primitives get boxed in order to allow null values.
           s"(${v._2.isNull}) ? (${ctx.boxedType(v._1)}) null : " +
-            s"new ${ctx.boxedType(v._1)}(${v._2.primitive})"
+            s"new ${ctx.boxedType(v._1)}(${v._2.value})"
         } else {
-          s"(${v._2.isNull}) ? null : ${v._2.primitive}"
+          s"(${v._2.isNull}) ? null : ${v._2.value}"
         }
       s + "," + nullSafeString
     })
@@ -600,13 +600,13 @@ case class FormatString(children: Expression*) extends Expression with ImplicitC
     s"""
       ${pattern.code}
       boolean ${ev.isNull} = ${pattern.isNull};
-      ${ctx.javaType(dataType)} ${ev.primitive} = ${ctx.defaultValue(dataType)};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${ev.isNull}) {
         ${argListCode.mkString}
         $stringBuffer $sb = new $stringBuffer();
         $formatter $form = new $formatter($sb, ${classOf[Locale].getName}.US);
-        $form.format(${pattern.primitive}.toString() $argListString);
-        ${ev.primitive} = UTF8String.fromString($sb.toString());
+        $form.format(${pattern.value}.toString() $argListString);
+        ${ev.value} = UTF8String.fromString($sb.toString());
       }
      """
   }
@@ -682,7 +682,7 @@ case class StringSpace(child: Expression)
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (length) =>
-      s"""${ev.primitive} = UTF8String.blankString(($length < 0) ? 0 : $length);""")
+      s"""${ev.value} = UTF8String.blankString(($length < 0) ? 0 : $length);""")
   }
 
   override def prettyName: String = "space"
@@ -760,7 +760,7 @@ case class Levenshtein(left: Expression, right: Expression) extends BinaryExpres
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (left, right) =>
-      s"${ev.primitive} = $left.levenshteinDistance($right);")
+      s"${ev.value} = $left.levenshteinDistance($right);")
   }
 }
 
@@ -803,9 +803,9 @@ case class Ascii(child: Expression) extends UnaryExpression with ImplicitCastInp
       s"""
         byte[] $bytes = $child.getBytes();
         if ($bytes.length > 0) {
-          ${ev.primitive} = (int) $bytes[0];
+          ${ev.value} = (int) $bytes[0];
         } else {
-          ${ev.primitive} = 0;
+          ${ev.value} = 0;
         }
        """})
   }
@@ -827,7 +827,7 @@ case class Base64(child: Expression) extends UnaryExpression with ImplicitCastIn
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (child) => {
-      s"""${ev.primitive} = UTF8String.fromBytes(
+      s"""${ev.value} = UTF8String.fromBytes(
             org.apache.commons.codec.binary.Base64.encodeBase64($child));
        """})
   }
@@ -848,7 +848,7 @@ case class UnBase64(child: Expression) extends UnaryExpression with ImplicitCast
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     nullSafeCodeGen(ctx, ev, (child) => {
       s"""
-         ${ev.primitive} = org.apache.commons.codec.binary.Base64.decodeBase64($child.toString());
+         ${ev.value} = org.apache.commons.codec.binary.Base64.decodeBase64($child.toString());
        """})
   }
 }
@@ -875,7 +875,7 @@ case class Decode(bin: Expression, charset: Expression)
     nullSafeCodeGen(ctx, ev, (bytes, charset) =>
       s"""
         try {
-          ${ev.primitive} = UTF8String.fromString(new String($bytes, $charset.toString()));
+          ${ev.value} = UTF8String.fromString(new String($bytes, $charset.toString()));
         } catch (java.io.UnsupportedEncodingException e) {
           org.apache.spark.unsafe.Platform.throwException(e);
         }
@@ -905,7 +905,7 @@ case class Encode(value: Expression, charset: Expression)
     nullSafeCodeGen(ctx, ev, (string, charset) =>
       s"""
         try {
-          ${ev.primitive} = $string.toString().getBytes($charset.toString());
+          ${ev.value} = $string.toString().getBytes($charset.toString());
         } catch (java.io.UnsupportedEncodingException e) {
           org.apache.spark.unsafe.Platform.throwException(e);
         }""")
@@ -1014,9 +1014,9 @@ case class FormatNumber(x: Expression, d: Expression)
             $lastDValue = $d;
             $numberFormat.applyPattern($dFormat.toPattern());
           }
-          ${ev.primitive} = UTF8String.fromString($numberFormat.format(${typeHelper(num)}));
+          ${ev.value} = UTF8String.fromString($numberFormat.format(${typeHelper(num)}));
         } else {
-          ${ev.primitive} = null;
+          ${ev.value} = null;
           ${ev.isNull} = true;
         }
        """

From 4b74755122d51edb1257d4f3785fb24508681068 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 7 Oct 2015 11:38:07 -0700
Subject: [PATCH 156/896] [SPARK-10812] [YARN] Fix shutdown of token renewer.

A recent change to fix the referenced bug caused this exception in
the `SparkContext.stop()` path:

org.apache.spark.SparkException: YarnSparkHadoopUtil is not available in non-YARN mode!
        at org.apache.spark.deploy.yarn.YarnSparkHadoopUtil$.get(YarnSparkHadoopUtil.scala:167)
        at org.apache.spark.scheduler.cluster.YarnClientSchedulerBackend.stop(YarnClientSchedulerBackend.scala:182)
        at org.apache.spark.scheduler.TaskSchedulerImpl.stop(TaskSchedulerImpl.scala:440)
        at org.apache.spark.scheduler.DAGScheduler.stop(DAGScheduler.scala:1579)
        at org.apache.spark.SparkContext$$anonfun$stop$7.apply$mcV$sp(SparkContext.scala:1730)
        at org.apache.spark.util.Utils$.tryLogNonFatalError(Utils.scala:1185)
        at org.apache.spark.SparkContext.stop(SparkContext.scala:1729)

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8996 from vanzin/SPARK-10812.
---
 .../spark/scheduler/cluster/YarnClientSchedulerBackend.scala    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
index d06d95140438..36d5759554d9 100644
--- a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
+++ b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
@@ -178,8 +178,8 @@ private[spark] class YarnClientSchedulerBackend(
       monitorThread.stopMonitor()
     }
     super.stop()
-    client.stop()
     YarnSparkHadoopUtil.get.stopExecutorDelegationTokenRenewer()
+    client.stop()
     logInfo("Stopped")
   }
 

From 6ca27f855075d65eb4535f1f2ed4fc9e68744231 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 7 Oct 2015 11:38:47 -0700
Subject: [PATCH 157/896] [SPARK-10964] [YARN] Correctly register the AM with
 the driver.

The `self` method returns null when called from the constructor;
instead, registration should happen in the `onStart` method, at
which point the `self` reference has already been initialized.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9005 from vanzin/SPARK-10964.
---
 .../apache/spark/scheduler/cluster/YarnSchedulerBackend.scala | 2 +-
 .../org/apache/spark/deploy/yarn/ApplicationMaster.scala      | 4 +++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index 6a4b536dee19..e0107f9d3dd1 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -169,7 +169,7 @@ private[spark] abstract class YarnSchedulerBackend(
     override def receive: PartialFunction[Any, Unit] = {
       case RegisterClusterManager(am) =>
         logInfo(s"ApplicationMaster registered as $am")
-        amEndpoint = Some(am)
+        amEndpoint = Option(am)
 
       case AddWebUIFilter(filterName, filterParams, proxyBase) =>
         addWebUIFilter(filterName, filterParams, proxyBase)
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 0df31736c163..a2ccdc05d73c 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -556,7 +556,9 @@ private[spark] class ApplicationMaster(
       override val rpcEnv: RpcEnv, driver: RpcEndpointRef, isClusterMode: Boolean)
     extends RpcEndpoint with Logging {
 
-    driver.send(RegisterClusterManager(self))
+    override def onStart(): Unit = {
+      driver.send(RegisterClusterManager(self))
+    }
 
     override def receive: PartialFunction[Any, Unit] = {
       case x: AddWebUIFilter =>

From 5be5d247440d6346d667c4b3d817666126f62906 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Wed, 7 Oct 2015 12:00:56 -0700
Subject: [PATCH 158/896] [SPARK-9841] [ML] Make clear public

It is currently impossible to clear Param values once set. It would be helpful to be able to.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8619 from holdenk/SPARK-9841-params-clear-needs-to-be-public.
---
 mllib/src/main/scala/org/apache/spark/ml/param/params.scala  | 2 +-
 .../test/scala/org/apache/spark/ml/param/ParamsSuite.scala   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
index 48f6269e57e9..ec98b05e13b8 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
@@ -454,7 +454,7 @@ trait Params extends Identifiable with Serializable {
   /**
    * Clears the user-supplied value for the input param.
    */
-  protected final def clear(param: Param[_]): this.type = {
+  final def clear(param: Param[_]): this.type = {
     shouldOwn(param)
     paramMap.remove(param)
     this
diff --git a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
index dfab82c8b67a..a2ea279f5d5e 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
@@ -156,6 +156,11 @@ class ParamsSuite extends SparkFunSuite {
     solver.clearMaxIter()
     assert(!solver.isSet(maxIter))
 
+    // Re-set and clear maxIter using the generic clear API
+    solver.setMaxIter(10)
+    solver.clear(maxIter)
+    assert(!solver.isSet(maxIter))
+
     val copied = solver.copy(ParamMap(solver.maxIter -> 50))
     assert(copied.uid === solver.uid)
     assert(copied.getInputCol === solver.getInputCol)

From a9ecd06149df4ccafd3927c35f63b9f03f170ae5 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 7 Oct 2015 13:19:49 -0700
Subject: [PATCH 159/896] [SPARK-10941] [SQL] Refactor AggregateFunction2 and
 AlgebraicAggregate interfaces to improve code clarity

This patch refactors several of the Aggregate2 interfaces in order to improve code clarity.

The biggest change is a refactoring of the `AggregateFunction2` class hierarchy. In the old code, we had a class named `AlgebraicAggregate` that inherited from `AggregateFunction2`, added a new set of methods, then banned the use of the inherited methods. I found this to be fairly confusing because.

If you look carefully at the existing code, you'll see that subclasses of `AggregateFunction2` fall into two disjoint categories: imperative aggregation functions which directly extended `AggregateFunction2` and declarative, expression-based aggregate functions which extended `AlgebraicAggregate`. In order to make this more explicit, this patch refactors things so that `AggregateFunction2` is a sealed abstract class with two subclasses, `ImperativeAggregateFunction` and `ExpressionAggregateFunction`. The superclass, `AggregateFunction2`, now only contains methods and fields that are common to both subclasses.

After making this change, I updated the various AggregationIterator classes to comply with this new naming scheme. I also performed several small renamings in the aggregate interfaces themselves in order to improve clarity and rewrote or expanded a number of comments.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8973 from JoshRosen/tungsten-agg-comments.
---
 .../expressions/aggregate/functions.scala     |  70 +++---
 .../expressions/aggregate/interfaces.scala    | 235 ++++++++++++------
 .../aggregate/HyperLogLogPlusPlusSuite.scala  |   2 +-
 .../aggregate/AggregationIterator.scala       | 188 +++++++-------
 .../SortBasedAggregationIterator.scala        |   2 +-
 .../aggregate/TungstenAggregate.scala         |   2 -
 .../TungstenAggregationIterator.scala         |  80 +++---
 .../spark/sql/execution/aggregate/udaf.scala  |  36 ++-
 .../spark/sql/execution/aggregate/utils.scala |  30 +--
 .../TungstenAggregationIteratorSuite.scala    |   2 +-
 .../org/apache/spark/sql/hive/hiveUDFs.scala  |   8 +-
 .../execution/AggregationQuerySuite.scala     |   4 +-
 12 files changed, 356 insertions(+), 303 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index e7f8104d439c..4ad2607a85ef 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -26,7 +26,7 @@ import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
 
-case class Average(child: Expression) extends AlgebraicAggregate {
+case class Average(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -57,7 +57,7 @@ case class Average(child: Expression) extends AlgebraicAggregate {
   private val currentSum = AttributeReference("currentSum", sumDataType)()
   private val currentCount = AttributeReference("currentCount", LongType)()
 
-  override val bufferAttributes = currentSum :: currentCount :: Nil
+  override val aggBufferAttributes = currentSum :: currentCount :: Nil
 
   override val initialValues = Seq(
     /* currentSum = */ Cast(Literal(0), sumDataType),
@@ -88,7 +88,7 @@ case class Average(child: Expression) extends AlgebraicAggregate {
   }
 }
 
-case class Count(child: Expression) extends AlgebraicAggregate {
+case class Count(child: Expression) extends ExpressionAggregate {
   override def children: Seq[Expression] = child :: Nil
 
   override def nullable: Boolean = false
@@ -101,7 +101,7 @@ case class Count(child: Expression) extends AlgebraicAggregate {
 
   private val currentCount = AttributeReference("currentCount", LongType)()
 
-  override val bufferAttributes = currentCount :: Nil
+  override val aggBufferAttributes = currentCount :: Nil
 
   override val initialValues = Seq(
     /* currentCount = */ Literal(0L)
@@ -118,7 +118,7 @@ case class Count(child: Expression) extends AlgebraicAggregate {
   override val evaluateExpression = Cast(currentCount, LongType)
 }
 
-case class First(child: Expression) extends AlgebraicAggregate {
+case class First(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -135,7 +135,7 @@ case class First(child: Expression) extends AlgebraicAggregate {
 
   private val first = AttributeReference("first", child.dataType)()
 
-  override val bufferAttributes = first :: Nil
+  override val aggBufferAttributes = first :: Nil
 
   override val initialValues = Seq(
     /* first = */ Literal.create(null, child.dataType)
@@ -152,7 +152,7 @@ case class First(child: Expression) extends AlgebraicAggregate {
   override val evaluateExpression = first
 }
 
-case class Last(child: Expression) extends AlgebraicAggregate {
+case class Last(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -169,7 +169,7 @@ case class Last(child: Expression) extends AlgebraicAggregate {
 
   private val last = AttributeReference("last", child.dataType)()
 
-  override val bufferAttributes = last :: Nil
+  override val aggBufferAttributes = last :: Nil
 
   override val initialValues = Seq(
     /* last = */ Literal.create(null, child.dataType)
@@ -186,7 +186,7 @@ case class Last(child: Expression) extends AlgebraicAggregate {
   override val evaluateExpression = last
 }
 
-case class Max(child: Expression) extends AlgebraicAggregate {
+case class Max(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -200,7 +200,7 @@ case class Max(child: Expression) extends AlgebraicAggregate {
 
   private val max = AttributeReference("max", child.dataType)()
 
-  override val bufferAttributes = max :: Nil
+  override val aggBufferAttributes = max :: Nil
 
   override val initialValues = Seq(
     /* max = */ Literal.create(null, child.dataType)
@@ -220,7 +220,7 @@ case class Max(child: Expression) extends AlgebraicAggregate {
   override val evaluateExpression = max
 }
 
-case class Min(child: Expression) extends AlgebraicAggregate {
+case class Min(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -234,7 +234,7 @@ case class Min(child: Expression) extends AlgebraicAggregate {
 
   private val min = AttributeReference("min", child.dataType)()
 
-  override val bufferAttributes = min :: Nil
+  override val aggBufferAttributes = min :: Nil
 
   override val initialValues = Seq(
     /* min = */ Literal.create(null, child.dataType)
@@ -277,7 +277,7 @@ case class StddevSamp(child: Expression) extends StddevAgg(child) {
 
 // Compute standard deviation based on online algorithm specified here:
 // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-abstract class StddevAgg(child: Expression) extends AlgebraicAggregate {
+abstract class StddevAgg(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -304,7 +304,7 @@ abstract class StddevAgg(child: Expression) extends AlgebraicAggregate {
   private val currentAvg = AttributeReference("currentAvg", resultType)()
   private val currentMk = AttributeReference("currentMk", resultType)()
 
-  override val bufferAttributes = preCount :: currentCount :: preAvg ::
+  override val aggBufferAttributes = preCount :: currentCount :: preAvg ::
                                   currentAvg :: currentMk :: Nil
 
   override val initialValues = Seq(
@@ -397,7 +397,7 @@ abstract class StddevAgg(child: Expression) extends AlgebraicAggregate {
   }
 }
 
-case class Sum(child: Expression) extends AlgebraicAggregate {
+case class Sum(child: Expression) extends ExpressionAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -429,7 +429,7 @@ case class Sum(child: Expression) extends AlgebraicAggregate {
 
   private val zero = Cast(Literal(0), sumDataType)
 
-  override val bufferAttributes = currentSum :: Nil
+  override val aggBufferAttributes = currentSum :: Nil
 
   override val initialValues = Seq(
     /* currentSum = */ Literal.create(null, sumDataType)
@@ -473,7 +473,7 @@ case class Sum(child: Expression) extends AlgebraicAggregate {
  */
 // scalastyle:on
 case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
-    extends AggregateFunction2 {
+    extends ImperativeAggregate {
   import HyperLogLogPlusPlus._
 
   /**
@@ -531,28 +531,26 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
    */
   private[this] val numWords = m / REGISTERS_PER_WORD + 1
 
-  def children: Seq[Expression] = Seq(child)
+  override def children: Seq[Expression] = Seq(child)
 
-  def nullable: Boolean = false
-
-  def dataType: DataType = LongType
+  override def nullable: Boolean = false
 
-  def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+  override def dataType: DataType = LongType
 
-  def bufferSchema: StructType = StructType.fromAttributes(bufferAttributes)
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  def cloneBufferAttributes: Seq[Attribute] = bufferAttributes.map(_.newInstance())
+  override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
 
   /** Allocate enough words to store all registers. */
-  val bufferAttributes: Seq[AttributeReference] = Seq.tabulate(numWords) { i =>
+  override val aggBufferAttributes: Seq[AttributeReference] = Seq.tabulate(numWords) { i =>
     AttributeReference(s"MS[$i]", LongType)()
   }
 
   /** Fill all words with zeros. */
-  def initialize(buffer: MutableRow): Unit = {
+  override def initialize(buffer: MutableRow): Unit = {
     var word = 0
     while (word < numWords) {
-      buffer.setLong(mutableBufferOffset + word, 0)
+      buffer.setLong(mutableAggBufferOffset + word, 0)
       word += 1
     }
   }
@@ -562,7 +560,7 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
    *
    * Variable names in the HLL++ paper match variable names in the code.
    */
-  def update(buffer: MutableRow, input: InternalRow): Unit = {
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
     val v = child.eval(input)
     if (v != null) {
       // Create the hashed value 'x'.
@@ -576,7 +574,7 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
 
       // Get the word containing the register we are interested in.
       val wordOffset = idx / REGISTERS_PER_WORD
-      val word = buffer.getLong(mutableBufferOffset + wordOffset)
+      val word = buffer.getLong(mutableAggBufferOffset + wordOffset)
 
       // Extract the M[J] register value from the word.
       val shift = REGISTER_SIZE * (idx - (wordOffset * REGISTERS_PER_WORD))
@@ -585,7 +583,7 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
 
       // Assign the maximum number of leading zeros to the register.
       if (pw > Midx) {
-        buffer.setLong(mutableBufferOffset + wordOffset, (word & ~mask) | (pw << shift))
+        buffer.setLong(mutableAggBufferOffset + wordOffset, (word & ~mask) | (pw << shift))
       }
     }
   }
@@ -594,12 +592,12 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
    * Merge the HLL buffers by iterating through the registers in both buffers and select the
    * maximum number of leading zeros for each register.
    */
-  def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
     var idx = 0
     var wordOffset = 0
     while (wordOffset < numWords) {
-      val word1 = buffer1.getLong(mutableBufferOffset + wordOffset)
-      val word2 = buffer2.getLong(inputBufferOffset + wordOffset)
+      val word1 = buffer1.getLong(mutableAggBufferOffset + wordOffset)
+      val word2 = buffer2.getLong(inputAggBufferOffset + wordOffset)
       var word = 0L
       var i = 0
       var mask = REGISTER_WORD_MASK
@@ -609,7 +607,7 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
         i += 1
         idx += 1
       }
-      buffer1.setLong(mutableBufferOffset + wordOffset, word)
+      buffer1.setLong(mutableAggBufferOffset + wordOffset, word)
       wordOffset += 1
     }
   }
@@ -664,14 +662,14 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
    *
    * Variable names in the HLL++ paper match variable names in the code.
    */
-  def eval(buffer: InternalRow): Any = {
+  override def eval(buffer: InternalRow): Any = {
     // Compute the inverse of indicator value 'z' and count the number of zeros 'V'.
     var zInverse = 0.0d
     var V = 0.0d
     var idx = 0
     var wordOffset = 0
     while (wordOffset < numWords) {
-      val word = buffer.getLong(mutableBufferOffset + wordOffset)
+      val word = buffer.getLong(mutableAggBufferOffset + wordOffset)
       var i = 0
       var shift = 0
       while (idx < m && i < REGISTERS_PER_WORD) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index d8699533cd15..74e15ec90b7f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -69,9 +69,6 @@ private[sql] case object NoOp extends Expression with Unevaluable {
 /**
  * A container for an [[AggregateFunction2]] with its [[AggregateMode]] and a field
  * (`isDistinct`) indicating if DISTINCT keyword is specified for this function.
- * @param aggregateFunction
- * @param mode
- * @param isDistinct
  */
 private[sql] case class AggregateExpression2(
     aggregateFunction: AggregateFunction2,
@@ -86,7 +83,7 @@ private[sql] case class AggregateExpression2(
   override def references: AttributeSet = {
     val childReferences = mode match {
       case Partial | Complete => aggregateFunction.references.toSeq
-      case PartialMerge | Final => aggregateFunction.bufferAttributes
+      case PartialMerge | Final => aggregateFunction.aggBufferAttributes
     }
 
     AttributeSet(childReferences)
@@ -95,98 +92,192 @@ private[sql] case class AggregateExpression2(
   override def toString: String = s"(${aggregateFunction},mode=$mode,isDistinct=$isDistinct)"
 }
 
-abstract class AggregateFunction2
-  extends Expression with ImplicitCastInputTypes {
+/**
+ * AggregateFunction2 is the superclass of two aggregation function interfaces:
+ *
+ *  - [[ImperativeAggregate]] is for aggregation functions that are specified in terms of
+ *    initialize(), update(), and merge() functions that operate on Row-based aggregation buffers.
+ *  - [[ExpressionAggregate]] is for aggregation functions that are specified using
+ *    Catalyst expressions.
+ *
+ * In both interfaces, aggregates must define the schema ([[aggBufferSchema]]) and attributes
+ * ([[aggBufferAttributes]]) of an aggregation buffer which is used to hold partial aggregate
+ * results. At runtime, multiple aggregate functions are evaluated by the same operator using a
+ * combined aggregation buffer which concatenates the aggregation buffers of the individual
+ * aggregate functions.
+ *
+ * Code which accepts [[AggregateFunction2]] instances should be prepared to handle both types of
+ * aggregate functions.
+ */
+sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInputTypes {
 
   /** An aggregate function is not foldable. */
   final override def foldable: Boolean = false
 
+  /** The schema of the aggregation buffer. */
+  def aggBufferSchema: StructType
+
+  /** Attributes of fields in aggBufferSchema. */
+  def aggBufferAttributes: Seq[AttributeReference]
+
   /**
-   * The offset of this function's start buffer value in the
-   * underlying shared mutable aggregation buffer.
-   * For example, we have two aggregate functions `avg(x)` and `avg(y)`, which share
-   * the same aggregation buffer. In this shared buffer, the position of the first
-   * buffer value of `avg(x)` will be 0 and the position of the first buffer value of `avg(y)`
-   * will be 2.
+   * Attributes of fields in input aggregation buffers (immutable aggregation buffers that are
+   * merged with mutable aggregation buffers in the merge() function or merge expressions).
+   * These attributes are created automatically by cloning the [[aggBufferAttributes]].
    */
-  protected var mutableBufferOffset: Int = 0
-
-  def withNewMutableBufferOffset(newMutableBufferOffset: Int): Unit = {
-    mutableBufferOffset = newMutableBufferOffset
-  }
+  def inputAggBufferAttributes: Seq[AttributeReference]
 
   /**
-   * The offset of this function's start buffer value in the
-   * underlying shared input aggregation buffer. An input aggregation buffer is used
-   * when we merge two aggregation buffers and it is basically the immutable one
-   * (we merge an input aggregation buffer and a mutable aggregation buffer and
-   * then store the new buffer values to the mutable aggregation buffer).
-   * Usually, an input aggregation buffer also contain extra elements like grouping
-   * keys at the beginning. So, mutableBufferOffset and inputBufferOffset are often
-   * different.
-   * For example, we have a grouping expression `key``, and two aggregate functions
-   * `avg(x)` and `avg(y)`. In this shared input aggregation buffer, the position of the first
-   * buffer value of `avg(x)` will be 1 and the position of the first buffer value of `avg(y)`
-   * will be 3 (position 0 is used for the value of key`).
+   * Indicates if this function supports partial aggregation.
+   * Currently Hive UDAF is the only one that doesn't support partial aggregation.
    */
-  protected var inputBufferOffset: Int = 0
+  def supportsPartial: Boolean = true
 
-  def withNewInputBufferOffset(newInputBufferOffset: Int): Unit = {
-    inputBufferOffset = newInputBufferOffset
-  }
+  override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
+    throw new UnsupportedOperationException(s"Cannot evaluate expression: $this")
+}
 
-  /** The schema of the aggregation buffer. */
-  def bufferSchema: StructType
+/**
+ * API for aggregation functions that are expressed in terms of imperative initialize(), update(),
+ * and merge() functions which operate on Row-based aggregation buffers.
+ *
+ * Within these functions, code should access fields of the mutable aggregation buffer by adding the
+ * bufferSchema-relative field number to `mutableAggBufferOffset` then using this new field number
+ * to access the buffer Row. This is necessary because this aggregation function's buffer is
+ * embedded inside of a larger shared aggregation buffer when an aggregation operator evaluates
+ * multiple aggregate functions at the same time.
+ *
+ * We need to perform similar field number arithmetic when merging multiple intermediate
+ * aggregate buffers together in `merge()` (in this case, use `inputAggBufferOffset` when accessing
+ * the input buffer).
+ */
+abstract class ImperativeAggregate extends AggregateFunction2 {
 
-  /** Attributes of fields in bufferSchema. */
-  def bufferAttributes: Seq[AttributeReference]
+  /**
+   * The offset of this function's first buffer value in the underlying shared mutable aggregation
+   * buffer.
+   *
+   * For example, we have two aggregate functions `avg(x)` and `avg(y)`, which share the same
+   * aggregation buffer. In this shared buffer, the position of the first buffer value of `avg(x)`
+   * will be 0 and the position of the first buffer value of `avg(y)` will be 2:
+   *
+   *          avg(x) mutableAggBufferOffset = 0
+   *                  |
+   *                  v
+   *                  +--------+--------+--------+--------+
+   *                  |  sum1  | count1 |  sum2  | count2 |
+   *                  +--------+--------+--------+--------+
+   *                                    ^
+   *                                    |
+   *                     avg(y) mutableAggBufferOffset = 2
+   *
+   */
+  protected var mutableAggBufferOffset: Int = 0
 
-  /** Clones bufferAttributes. */
-  def cloneBufferAttributes: Seq[Attribute]
+  def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): Unit = {
+    mutableAggBufferOffset = newMutableAggBufferOffset
+  }
 
   /**
-   * Initializes its aggregation buffer located in `buffer`.
-   * It will use bufferOffset to find the starting point of
-   * its buffer in the given `buffer` shared with other functions.
+   * The offset of this function's start buffer value in the underlying shared input aggregation
+   * buffer. An input aggregation buffer is used when we merge two aggregation buffers together in
+   * the `update()` function and is immutable (we merge an input aggregation buffer and a mutable
+   * aggregation buffer and then store the new buffer values to the mutable aggregation buffer).
+   *
+   * An input aggregation buffer may contain extra fields, such as grouping keys, at its start, so
+   * mutableAggBufferOffset and inputAggBufferOffset are often different.
+   *
+   * For example, say we have a grouping expression, `key`, and two aggregate functions,
+   * `avg(x)` and `avg(y)`. In the shared input aggregation buffer, the position of the first
+   * buffer value of `avg(x)` will be 1 and the position of the first buffer value of `avg(y)`
+   * will be 3 (position 0 is used for the value of `key`):
+   *
+   *          avg(x) inputAggBufferOffset = 1
+   *                   |
+   *                   v
+   *          +--------+--------+--------+--------+--------+
+   *          |  key   |  sum1  | count1 |  sum2  | count2 |
+   *          +--------+--------+--------+--------+--------+
+   *                                     ^
+   *                                     |
+   *                       avg(y) inputAggBufferOffset = 3
+   *
    */
-  def initialize(buffer: MutableRow): Unit
+  protected var inputAggBufferOffset: Int = 0
+
+  def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): Unit = {
+    inputAggBufferOffset = newInputAggBufferOffset
+  }
 
   /**
-   * Updates its aggregation buffer located in `buffer` based on the given `input`.
-   * It will use bufferOffset to find the starting point of its buffer in the given `buffer`
-   * shared with other functions.
+   * Initializes the mutable aggregation buffer located in `mutableAggBuffer`.
+   *
+   * Use `fieldNumber + mutableAggBufferOffset` to access fields of `mutableAggBuffer`.
    */
-  def update(buffer: MutableRow, input: InternalRow): Unit
+  def initialize(mutableAggBuffer: MutableRow): Unit
 
   /**
-   * Updates its aggregation buffer located in `buffer1` by combining intermediate results
-   * in the current buffer and intermediate results from another buffer `buffer2`.
-   * It will use bufferOffset to find the starting point of its buffer in the given `buffer1`
-   * and `buffer2`.
+   * Updates its aggregation buffer, located in `mutableAggBuffer`, based on the given `inputRow`.
+   *
+   * Use `fieldNumber + mutableAggBufferOffset` to access fields of `mutableAggBuffer`.
    */
-  def merge(buffer1: MutableRow, buffer2: InternalRow): Unit
-
-  override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
-    throw new UnsupportedOperationException(s"Cannot evaluate expression: $this")
+  def update(mutableAggBuffer: MutableRow, inputRow: InternalRow): Unit
 
   /**
-   * Indicates if this function supports partial aggregation.
-   * Currently Hive UDAF is the only one that doesn't support partial aggregation.
+   * Combines new intermediate results from the `inputAggBuffer` with the existing intermediate
+   * results in the `mutableAggBuffer.`
+   *
+   * Use `fieldNumber + mutableAggBufferOffset` to access fields of `mutableAggBuffer`.
+   * Use `fieldNumber + inputAggBufferOffset` to access fields of `inputAggBuffer`.
    */
-  def supportsPartial: Boolean = true
+  def merge(mutableAggBuffer: MutableRow, inputAggBuffer: InternalRow): Unit
+
+  final lazy val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
 }
 
 /**
- * A helper class for aggregate functions that can be implemented in terms of catalyst expressions.
+ * API for aggregation functions that are expressed in terms of Catalyst expressions.
+ *
+ * When implementing a new expression-based aggregate function, start by implementing
+ * `bufferAttributes`, defining attributes for the fields of the mutable aggregation buffer. You
+ * can then use these attributes when defining `updateExpressions`, `mergeExpressions`, and
+ * `evaluateExpressions`.
  */
-abstract class AlgebraicAggregate extends AggregateFunction2 with Serializable with Unevaluable {
+abstract class ExpressionAggregate
+  extends AggregateFunction2
+  with Serializable
+  with Unevaluable {
 
+  /**
+   * Expressions for initializing empty aggregation buffers.
+   */
   val initialValues: Seq[Expression]
+
+  /**
+   * Expressions for updating the mutable aggregation buffer based on an input row.
+   */
   val updateExpressions: Seq[Expression]
+
+  /**
+   * A sequence of expressions for merging two aggregation buffers together. When defining these
+   * expressions, you can use the syntax `attributeName.left` and `attributeName.right` to refer
+   * to the attributes corresponding to each of the buffers being merged (this magic is enabled
+   * by the [[RichAttribute]] implicit class).
+   */
   val mergeExpressions: Seq[Expression]
+
+  /**
+   * An expression which returns the final value for this aggregate function. Its data type should
+   * match this expression's [[dataType]].
+   */
   val evaluateExpression: Expression
 
-  override lazy val cloneBufferAttributes = bufferAttributes.map(_.newInstance())
+  /** An expression-based aggregate's bufferSchema is derived from bufferAttributes. */
+  final override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
+
+  final lazy val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
 
   /**
    * A helper class for representing an attribute used in merging two
@@ -194,33 +285,13 @@ abstract class AlgebraicAggregate extends AggregateFunction2 with Serializable w
    * we merge buffer values and then update bufferLeft. A [[RichAttribute]]
    * of an [[AttributeReference]] `a` has two functions `left` and `right`,
    * which represent `a` in `bufferLeft` and `bufferRight`, respectively.
-   * @param a
    */
   implicit class RichAttribute(a: AttributeReference) {
     /** Represents this attribute at the mutable buffer side. */
     def left: AttributeReference = a
 
     /** Represents this attribute at the input buffer side (the data value is read-only). */
-    def right: AttributeReference = cloneBufferAttributes(bufferAttributes.indexOf(a))
-  }
-
-  /** An AlgebraicAggregate's bufferSchema is derived from bufferAttributes. */
-  override def bufferSchema: StructType = StructType.fromAttributes(bufferAttributes)
-
-  override def initialize(buffer: MutableRow): Unit = {
-    throw new UnsupportedOperationException(
-      "AlgebraicAggregate's initialize should not be called directly")
-  }
-
-  override final def update(buffer: MutableRow, input: InternalRow): Unit = {
-    throw new UnsupportedOperationException(
-      "AlgebraicAggregate's update should not be called directly")
+    def right: AttributeReference = inputAggBufferAttributes(aggBufferAttributes.indexOf(a))
   }
-
-  override final def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
-    throw new UnsupportedOperationException(
-      "AlgebraicAggregate's merge should not be called directly")
-  }
-
 }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala
index ecc0644164de..0d329497758c 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlusSuite.scala
@@ -38,7 +38,7 @@ class HyperLogLogPlusPlusSuite extends SparkFunSuite {
   }
 
   def createBuffer(hll: HyperLogLogPlusPlus): MutableRow = {
-    val buffer = new SpecificMutableRow(hll.bufferAttributes.map(_.dataType))
+    val buffer = new SpecificMutableRow(hll.aggBufferAttributes.map(_.dataType))
     hll.initialize(buffer)
     buffer
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index 62dbc07e883f..04903022e546 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -85,9 +85,9 @@ abstract class AggregationIterator(
     while (i < allAggregateExpressions.length) {
       val func = allAggregateExpressions(i).aggregateFunction
       val funcWithBoundReferences = allAggregateExpressions(i).mode match {
-        case Partial | Complete if !func.isInstanceOf[AlgebraicAggregate] =>
+        case Partial | Complete if func.isInstanceOf[ImperativeAggregate] =>
           // We need to create BoundReferences if the function is not an
-          // AlgebraicAggregate (it does not support code-gen) and the mode of
+          // expression-based aggregate function (it does not support code-gen) and the mode of
           // this function is Partial or Complete because we will call eval of this
           // function's children in the update method of this aggregate function.
           // Those eval calls require BoundReferences to work.
@@ -95,31 +95,39 @@ abstract class AggregationIterator(
         case _ =>
           // We only need to set inputBufferOffset for aggregate functions with mode
           // PartialMerge and Final.
-          func.withNewInputBufferOffset(inputBufferOffset)
-          inputBufferOffset += func.bufferSchema.length
+          func match {
+            case function: ImperativeAggregate =>
+              function.withNewInputAggBufferOffset(inputBufferOffset)
+            case _ =>
+          }
+          inputBufferOffset += func.aggBufferSchema.length
           func
       }
       // Set mutableBufferOffset for this function. It is important that setting
       // mutableBufferOffset happens after all potential bindReference operations
       // because bindReference will create a new instance of the function.
-      funcWithBoundReferences.withNewMutableBufferOffset(mutableBufferOffset)
-      mutableBufferOffset += funcWithBoundReferences.bufferSchema.length
+      funcWithBoundReferences match {
+        case function: ImperativeAggregate =>
+          function.withNewMutableAggBufferOffset(mutableBufferOffset)
+        case _ =>
+      }
+      mutableBufferOffset += funcWithBoundReferences.aggBufferSchema.length
       functions(i) = funcWithBoundReferences
       i += 1
     }
     functions
   }
 
-  // Positions of those non-algebraic aggregate functions in allAggregateFunctions.
+  // Positions of those imperative aggregate functions in allAggregateFunctions.
   // For example, we have func1, func2, func3, func4 in aggregateFunctions, and
-  // func2 and func3 are non-algebraic aggregate functions.
-  // nonAlgebraicAggregateFunctionPositions will be [1, 2].
-  private[this] val allNonAlgebraicAggregateFunctionPositions: Array[Int] = {
+  // func2 and func3 are imperative aggregate functions.
+  // ImperativeAggregateFunctionPositions will be [1, 2].
+  private[this] val allImperativeAggregateFunctionPositions: Array[Int] = {
     val positions = new ArrayBuffer[Int]()
     var i = 0
     while (i < allAggregateFunctions.length) {
       allAggregateFunctions(i) match {
-        case agg: AlgebraicAggregate =>
+        case agg: ExpressionAggregate =>
         case _ => positions += i
       }
       i += 1
@@ -131,24 +139,26 @@ abstract class AggregationIterator(
   private[this] val nonCompleteAggregateFunctions: Array[AggregateFunction2] =
     allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
 
-  // All non-algebraic aggregate functions with mode Partial, PartialMerge, or Final.
-  private[this] val nonCompleteNonAlgebraicAggregateFunctions: Array[AggregateFunction2] =
-    nonCompleteAggregateFunctions.collect {
-      case func: AggregateFunction2 if !func.isInstanceOf[AlgebraicAggregate] => func
-    }
+  // All imperative aggregate functions with mode Partial, PartialMerge, or Final.
+  private[this] val nonCompleteImperativeAggregateFunctions: Array[ImperativeAggregate] =
+    nonCompleteAggregateFunctions.collect { case func: ImperativeAggregate => func }
 
-  // The projection used to initialize buffer values for all AlgebraicAggregates.
-  private[this] val algebraicInitialProjection = {
+  // The projection used to initialize buffer values for all expression-based aggregates.
+  private[this] val expressionAggInitialProjection = {
     val initExpressions = allAggregateFunctions.flatMap {
-      case ae: AlgebraicAggregate => ae.initialValues
-      case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+      case ae: ExpressionAggregate => ae.initialValues
+      // For the positions corresponding to imperative aggregate functions, we'll use special
+      // no-op expressions which are ignored during projection code-generation.
+      case i: ImperativeAggregate => Seq.fill(i.aggBufferAttributes.length)(NoOp)
     }
     newMutableProjection(initExpressions, Nil)()
   }
 
-  // All non-Algebraic AggregateFunctions.
-  private[this] val allNonAlgebraicAggregateFunctions =
-    allNonAlgebraicAggregateFunctionPositions.map(allAggregateFunctions)
+  // All imperative AggregateFunctions.
+  private[this] val allImperativeAggregateFunctions: Array[ImperativeAggregate] =
+    allImperativeAggregateFunctionPositions
+      .map(allAggregateFunctions)
+      .map(_.asInstanceOf[ImperativeAggregate])
 
   ///////////////////////////////////////////////////////////////////////////
   // Methods and fields used by sub-classes.
@@ -157,25 +167,25 @@ abstract class AggregationIterator(
   // Initializing functions used to process a row.
   protected val processRow: (MutableRow, InternalRow) => Unit = {
     val rowToBeProcessed = new JoinedRow
-    val aggregationBufferSchema = allAggregateFunctions.flatMap(_.bufferAttributes)
+    val aggregationBufferSchema = allAggregateFunctions.flatMap(_.aggBufferAttributes)
     aggregationMode match {
       // Partial-only
       case (Some(Partial), None) =>
         val updateExpressions = nonCompleteAggregateFunctions.flatMap {
-          case ae: AlgebraicAggregate => ae.updateExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+          case ae: ExpressionAggregate => ae.updateExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
-        val algebraicUpdateProjection =
+        val expressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
 
         (currentBuffer: MutableRow, row: InternalRow) => {
-          algebraicUpdateProjection.target(currentBuffer)
-          // Process all algebraic aggregate functions.
-          algebraicUpdateProjection(rowToBeProcessed(currentBuffer, row))
-          // Process all non-algebraic aggregate functions.
+          expressionAggUpdateProjection.target(currentBuffer)
+          // Process all expression-based aggregate functions.
+          expressionAggUpdateProjection(rowToBeProcessed(currentBuffer, row))
+          // Process all imperative aggregate functions.
           var i = 0
-          while (i < nonCompleteNonAlgebraicAggregateFunctions.length) {
-            nonCompleteNonAlgebraicAggregateFunctions(i).update(currentBuffer, row)
+          while (i < nonCompleteImperativeAggregateFunctions.length) {
+            nonCompleteImperativeAggregateFunctions(i).update(currentBuffer, row)
             i += 1
           }
         }
@@ -186,30 +196,30 @@ abstract class AggregationIterator(
           // If initialInputBufferOffset, the input value does not contain
           // grouping keys.
           // This part is pretty hacky.
-          allAggregateFunctions.flatMap(_.cloneBufferAttributes).toSeq
+          allAggregateFunctions.flatMap(_.inputAggBufferAttributes).toSeq
         } else {
-          groupingKeyAttributes ++ allAggregateFunctions.flatMap(_.cloneBufferAttributes)
+          groupingKeyAttributes ++ allAggregateFunctions.flatMap(_.inputAggBufferAttributes)
         }
         // val inputAggregationBufferSchema =
         //  groupingKeyAttributes ++
         //    allAggregateFunctions.flatMap(_.cloneBufferAttributes)
         val mergeExpressions = nonCompleteAggregateFunctions.flatMap {
-          case ae: AlgebraicAggregate => ae.mergeExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+          case ae: ExpressionAggregate => ae.mergeExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
-        // This projection is used to merge buffer values for all AlgebraicAggregates.
-        val algebraicMergeProjection =
+        // This projection is used to merge buffer values for all expression-based aggregates.
+        val expressionAggMergeProjection =
           newMutableProjection(
             mergeExpressions,
             aggregationBufferSchema ++ inputAggregationBufferSchema)()
 
         (currentBuffer: MutableRow, row: InternalRow) => {
-          // Process all algebraic aggregate functions.
-          algebraicMergeProjection.target(currentBuffer)(rowToBeProcessed(currentBuffer, row))
-          // Process all non-algebraic aggregate functions.
+          // Process all expression-based aggregate functions.
+          expressionAggMergeProjection.target(currentBuffer)(rowToBeProcessed(currentBuffer, row))
+          // Process all imperative aggregate functions.
           var i = 0
-          while (i < nonCompleteNonAlgebraicAggregateFunctions.length) {
-            nonCompleteNonAlgebraicAggregateFunctions(i).merge(currentBuffer, row)
+          while (i < nonCompleteImperativeAggregateFunctions.length) {
+            nonCompleteImperativeAggregateFunctions(i).merge(currentBuffer, row)
             i += 1
           }
         }
@@ -218,57 +228,55 @@ abstract class AggregationIterator(
       case (Some(Final), Some(Complete)) =>
         val completeAggregateFunctions: Array[AggregateFunction2] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
-        // All non-algebraic aggregate functions with mode Complete.
-        val completeNonAlgebraicAggregateFunctions: Array[AggregateFunction2] =
-          completeAggregateFunctions.collect {
-            case func: AggregateFunction2 if !func.isInstanceOf[AlgebraicAggregate] => func
-          }
+        // All imperative aggregate functions with mode Complete.
+        val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          completeAggregateFunctions.collect { case func: ImperativeAggregate => func }
 
         // The first initialInputBufferOffset values of the input aggregation buffer is
         // for grouping expressions and distinct columns.
         val groupingAttributesAndDistinctColumns = valueAttributes.take(initialInputBufferOffset)
 
         val completeOffsetExpressions =
-          Seq.fill(completeAggregateFunctions.map(_.bufferAttributes.length).sum)(NoOp)
+          Seq.fill(completeAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
         // We do not touch buffer values of aggregate functions with the Final mode.
         val finalOffsetExpressions =
-          Seq.fill(nonCompleteAggregateFunctions.map(_.bufferAttributes.length).sum)(NoOp)
+          Seq.fill(nonCompleteAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
 
         val mergeInputSchema =
           aggregationBufferSchema ++
             groupingAttributesAndDistinctColumns ++
-            nonCompleteAggregateFunctions.flatMap(_.cloneBufferAttributes)
+            nonCompleteAggregateFunctions.flatMap(_.inputAggBufferAttributes)
         val mergeExpressions =
           nonCompleteAggregateFunctions.flatMap {
-            case ae: AlgebraicAggregate => ae.mergeExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+            case ae: ExpressionAggregate => ae.mergeExpressions
+            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           } ++ completeOffsetExpressions
-        val finalAlgebraicMergeProjection =
+        val finalExpressionAggMergeProjection =
           newMutableProjection(mergeExpressions, mergeInputSchema)()
 
         val updateExpressions =
           finalOffsetExpressions ++ completeAggregateFunctions.flatMap {
-            case ae: AlgebraicAggregate => ae.updateExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+            case ae: ExpressionAggregate => ae.updateExpressions
+            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
-        val completeAlgebraicUpdateProjection =
+        val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
 
         (currentBuffer: MutableRow, row: InternalRow) => {
           val input = rowToBeProcessed(currentBuffer, row)
           // For all aggregate functions with mode Complete, update buffers.
-          completeAlgebraicUpdateProjection.target(currentBuffer)(input)
+          completeExpressionAggUpdateProjection.target(currentBuffer)(input)
           var i = 0
-          while (i < completeNonAlgebraicAggregateFunctions.length) {
-            completeNonAlgebraicAggregateFunctions(i).update(currentBuffer, row)
+          while (i < completeImperativeAggregateFunctions.length) {
+            completeImperativeAggregateFunctions(i).update(currentBuffer, row)
             i += 1
           }
 
           // For all aggregate functions with mode Final, merge buffers.
-          finalAlgebraicMergeProjection.target(currentBuffer)(input)
+          finalExpressionAggMergeProjection.target(currentBuffer)(input)
           i = 0
-          while (i < nonCompleteNonAlgebraicAggregateFunctions.length) {
-            nonCompleteNonAlgebraicAggregateFunctions(i).merge(currentBuffer, row)
+          while (i < nonCompleteImperativeAggregateFunctions.length) {
+            nonCompleteImperativeAggregateFunctions(i).merge(currentBuffer, row)
             i += 1
           }
         }
@@ -277,27 +285,25 @@ abstract class AggregationIterator(
       case (None, Some(Complete)) =>
         val completeAggregateFunctions: Array[AggregateFunction2] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
-        // All non-algebraic aggregate functions with mode Complete.
-        val completeNonAlgebraicAggregateFunctions: Array[AggregateFunction2] =
-          completeAggregateFunctions.collect {
-            case func: AggregateFunction2 if !func.isInstanceOf[AlgebraicAggregate] => func
-          }
+        // All imperative aggregate functions with mode Complete.
+        val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          completeAggregateFunctions.collect { case func: ImperativeAggregate => func }
 
         val updateExpressions =
           completeAggregateFunctions.flatMap {
-            case ae: AlgebraicAggregate => ae.updateExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.bufferAttributes.length)(NoOp)
+            case ae: ExpressionAggregate => ae.updateExpressions
+            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
-        val completeAlgebraicUpdateProjection =
+        val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
 
         (currentBuffer: MutableRow, row: InternalRow) => {
           val input = rowToBeProcessed(currentBuffer, row)
           // For all aggregate functions with mode Complete, update buffers.
-          completeAlgebraicUpdateProjection.target(currentBuffer)(input)
+          completeExpressionAggUpdateProjection.target(currentBuffer)(input)
           var i = 0
-          while (i < completeNonAlgebraicAggregateFunctions.length) {
-            completeNonAlgebraicAggregateFunctions(i).update(currentBuffer, row)
+          while (i < completeImperativeAggregateFunctions.length) {
+            completeImperativeAggregateFunctions(i).update(currentBuffer, row)
             i += 1
           }
         }
@@ -315,11 +321,11 @@ abstract class AggregationIterator(
   // Initializing the function used to generate the output row.
   protected val generateOutput: (InternalRow, MutableRow) => InternalRow = {
     val rowToBeEvaluated = new JoinedRow
-    val safeOutoutRow = new GenericMutableRow(resultExpressions.length)
+    val safeOutputRow = new GenericMutableRow(resultExpressions.length)
     val mutableOutput = if (outputsUnsafeRows) {
-      UnsafeProjection.create(resultExpressions.map(_.dataType).toArray).apply(safeOutoutRow)
+      UnsafeProjection.create(resultExpressions.map(_.dataType).toArray).apply(safeOutputRow)
     } else {
-      safeOutoutRow
+      safeOutputRow
     }
 
     aggregationMode match {
@@ -329,7 +335,7 @@ abstract class AggregationIterator(
         // Because we cannot copy a joinedRow containing a UnsafeRow (UnsafeRow does not
         // support generic getter), we create a mutable projection to output the
         // JoinedRow(currentGroupingKey, currentBuffer)
-        val bufferSchema = nonCompleteAggregateFunctions.flatMap(_.bufferAttributes)
+        val bufferSchema = nonCompleteAggregateFunctions.flatMap(_.aggBufferAttributes)
         val resultProjection =
           newMutableProjection(
             groupingKeyAttributes ++ bufferSchema,
@@ -345,12 +351,12 @@ abstract class AggregationIterator(
       // resultExpressions.
       case (Some(Final), None) | (Some(Final) | None, Some(Complete)) =>
         val bufferSchemata =
-          allAggregateFunctions.flatMap(_.bufferAttributes)
+          allAggregateFunctions.flatMap(_.aggBufferAttributes)
         val evalExpressions = allAggregateFunctions.map {
-          case ae: AlgebraicAggregate => ae.evaluateExpression
+          case ae: ExpressionAggregate => ae.evaluateExpression
           case agg: AggregateFunction2 => NoOp
         }
-        val algebraicEvalProjection = newMutableProjection(evalExpressions, bufferSchemata)()
+        val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferSchemata)()
         val aggregateResultSchema = nonCompleteAggregateAttributes ++ completeAggregateAttributes
         // TODO: Use unsafe row.
         val aggregateResult = new GenericMutableRow(aggregateResultSchema.length)
@@ -360,14 +366,14 @@ abstract class AggregationIterator(
         resultProjection.target(mutableOutput)
 
         (currentGroupingKey: InternalRow, currentBuffer: MutableRow) => {
-          // Generate results for all algebraic aggregate functions.
-          algebraicEvalProjection.target(aggregateResult)(currentBuffer)
-          // Generate results for all non-algebraic aggregate functions.
+          // Generate results for all expression-based aggregate functions.
+          expressionAggEvalProjection.target(aggregateResult)(currentBuffer)
+          // Generate results for all imperative aggregate functions.
           var i = 0
-          while (i < allNonAlgebraicAggregateFunctions.length) {
+          while (i < allImperativeAggregateFunctions.length) {
             aggregateResult.update(
-              allNonAlgebraicAggregateFunctionPositions(i),
-              allNonAlgebraicAggregateFunctions(i).eval(currentBuffer))
+              allImperativeAggregateFunctionPositions(i),
+              allImperativeAggregateFunctions(i).eval(currentBuffer))
             i += 1
           }
           resultProjection(rowToBeEvaluated(currentGroupingKey, aggregateResult))
@@ -392,10 +398,10 @@ abstract class AggregationIterator(
 
   /** Initializes buffer values for all aggregate functions. */
   protected def initializeBuffer(buffer: MutableRow): Unit = {
-    algebraicInitialProjection.target(buffer)(EmptyRow)
+    expressionAggInitialProjection.target(buffer)(EmptyRow)
     var i = 0
-    while (i < allNonAlgebraicAggregateFunctions.length) {
-      allNonAlgebraicAggregateFunctions(i).initialize(buffer)
+    while (i < allImperativeAggregateFunctions.length) {
+      allImperativeAggregateFunctions(i).initialize(buffer)
       i += 1
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
index 73d50e07cf0b..a9e5d175bf89 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
@@ -54,7 +54,7 @@ class SortBasedAggregationIterator(
     outputsUnsafeRows) {
 
   override protected def newBuffer: MutableRow = {
-    val bufferSchema = allAggregateFunctions.flatMap(_.bufferAttributes)
+    val bufferSchema = allAggregateFunctions.flatMap(_.aggBufferAttributes)
     val bufferRowSize: Int = bufferSchema.length
 
     val genericMutableBuffer = new GenericMutableRow(bufferRowSize)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index ba379d358d20..3cd22af30592 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -32,7 +32,6 @@ case class TungstenAggregate(
     groupingExpressions: Seq[NamedExpression],
     nonCompleteAggregateExpressions: Seq[AggregateExpression2],
     completeAggregateExpressions: Seq[AggregateExpression2],
-    initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
     child: SparkPlan)
   extends UnaryNode {
@@ -79,7 +78,6 @@ case class TungstenAggregate(
         groupingExpressions,
         nonCompleteAggregateExpressions,
         completeAggregateExpressions,
-        initialInputBufferOffset,
         resultExpressions,
         newMutableProjection,
         child.output,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index 26fdbc83ef50..6a84c0af0b46 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -62,10 +62,6 @@ import org.apache.spark.sql.types.StructType
  *   [[PartialMerge]], or [[Final]].
  * @param completeAggregateExpressions
  *   [[AggregateExpression2]] containing [[AggregateFunction2]]s with mode [[Complete]].
- * @param initialInputBufferOffset
- *   If this iterator is used to handle functions with mode [[PartialMerge]] or [[Final]].
- *   The input rows have the format of `grouping keys + aggregation buffer`.
- *   This offset indicates the starting position of aggregation buffer in a input row.
  * @param resultExpressions
  *   expressions for generating output rows.
  * @param newMutableProjection
@@ -77,7 +73,6 @@ class TungstenAggregationIterator(
     groupingExpressions: Seq[NamedExpression],
     nonCompleteAggregateExpressions: Seq[AggregateExpression2],
     completeAggregateExpressions: Seq[AggregateExpression2],
-    initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
     newMutableProjection: (Seq[Expression], Seq[Attribute]) => (() => MutableProjection),
     originalInputAttributes: Seq[Attribute],
@@ -133,17 +128,18 @@ class TungstenAggregationIterator(
       completeAggregateExpressions.map(_.mode).distinct.headOption
   }
 
-  // All aggregate functions. TungstenAggregationIterator only handles AlgebraicAggregates.
-  // If there is any functions that is not an AlgebraicAggregate, we throw an
+  // All aggregate functions. TungstenAggregationIterator only handles expression-based aggregate.
+  // If there is any functions that is an ImperativeAggregateFunction, we throw an
   // IllegalStateException.
-  private[this] val allAggregateFunctions: Array[AlgebraicAggregate] = {
-    if (!allAggregateExpressions.forall(_.aggregateFunction.isInstanceOf[AlgebraicAggregate])) {
+  private[this] val allAggregateFunctions: Array[ExpressionAggregate] = {
+    if (!allAggregateExpressions.forall(
+        _.aggregateFunction.isInstanceOf[ExpressionAggregate])) {
       throw new IllegalStateException(
-        "Only AlgebraicAggregates should be passed in TungstenAggregationIterator.")
+        "Only ExpressionAggregateFunctions should be passed in TungstenAggregationIterator.")
     }
 
     allAggregateExpressions
-      .map(_.aggregateFunction.asInstanceOf[AlgebraicAggregate])
+      .map(_.aggregateFunction.asInstanceOf[ExpressionAggregate])
       .toArray
   }
 
@@ -154,7 +150,7 @@ class TungstenAggregationIterator(
   ///////////////////////////////////////////////////////////////////////////
 
   // The projection used to initialize buffer values.
-  private[this] val algebraicInitialProjection: MutableProjection = {
+  private[this] val initialProjection: MutableProjection = {
     val initExpressions = allAggregateFunctions.flatMap(_.initialValues)
     newMutableProjection(initExpressions, Nil)()
   }
@@ -164,14 +160,14 @@ class TungstenAggregationIterator(
   // when we switch to sort-based aggregation, and when we create the re-used buffer for
   // sort-based aggregation).
   private def createNewAggregationBuffer(): UnsafeRow = {
-    val bufferSchema = allAggregateFunctions.flatMap(_.bufferAttributes)
+    val bufferSchema = allAggregateFunctions.flatMap(_.aggBufferAttributes)
     val bufferRowSize: Int = bufferSchema.length
 
     val genericMutableBuffer = new GenericMutableRow(bufferRowSize)
     val unsafeProjection =
       UnsafeProjection.create(bufferSchema.map(_.dataType))
     val buffer = unsafeProjection.apply(genericMutableBuffer)
-    algebraicInitialProjection.target(buffer)(EmptyRow)
+    initialProjection.target(buffer)(EmptyRow)
     buffer
   }
 
@@ -179,84 +175,78 @@ class TungstenAggregationIterator(
   private def generateProcessRow(
       inputAttributes: Seq[Attribute]): (UnsafeRow, InternalRow) => Unit = {
 
-    val aggregationBufferAttributes = allAggregateFunctions.flatMap(_.bufferAttributes)
+    val aggregationBufferAttributes = allAggregateFunctions.flatMap(_.aggBufferAttributes)
     val joinedRow = new JoinedRow()
 
     aggregationMode match {
       // Partial-only
       case (Some(Partial), None) =>
         val updateExpressions = allAggregateFunctions.flatMap(_.updateExpressions)
-        val algebraicUpdateProjection =
+        val updateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          algebraicUpdateProjection.target(currentBuffer)
-          algebraicUpdateProjection(joinedRow(currentBuffer, row))
+          updateProjection.target(currentBuffer)
+          updateProjection(joinedRow(currentBuffer, row))
         }
 
       // PartialMerge-only or Final-only
       case (Some(PartialMerge), None) | (Some(Final), None) =>
         val mergeExpressions = allAggregateFunctions.flatMap(_.mergeExpressions)
-        // This projection is used to merge buffer values for all AlgebraicAggregates.
-        val algebraicMergeProjection =
-          newMutableProjection(
-            mergeExpressions,
-            aggregationBufferAttributes ++ inputAttributes)()
+        val mergeProjection =
+          newMutableProjection(mergeExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          // Process all algebraic aggregate functions.
-          algebraicMergeProjection.target(currentBuffer)
-          algebraicMergeProjection(joinedRow(currentBuffer, row))
+          mergeProjection.target(currentBuffer)
+          mergeProjection(joinedRow(currentBuffer, row))
         }
 
       // Final-Complete
       case (Some(Final), Some(Complete)) =>
-        val nonCompleteAggregateFunctions: Array[AlgebraicAggregate] =
+        val nonCompleteAggregateFunctions: Array[ExpressionAggregate] =
           allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
-        val completeAggregateFunctions: Array[AlgebraicAggregate] =
+        val completeAggregateFunctions: Array[ExpressionAggregate] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
 
         val completeOffsetExpressions =
-          Seq.fill(completeAggregateFunctions.map(_.bufferAttributes.length).sum)(NoOp)
+          Seq.fill(completeAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
         val mergeExpressions =
           nonCompleteAggregateFunctions.flatMap(_.mergeExpressions) ++ completeOffsetExpressions
-        val finalAlgebraicMergeProjection =
-          newMutableProjection(
-            mergeExpressions,
-            aggregationBufferAttributes ++ inputAttributes)()
+        val finalMergeProjection =
+          newMutableProjection(mergeExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         // We do not touch buffer values of aggregate functions with the Final mode.
         val finalOffsetExpressions =
-          Seq.fill(nonCompleteAggregateFunctions.map(_.bufferAttributes.length).sum)(NoOp)
+          Seq.fill(nonCompleteAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
         val updateExpressions =
           finalOffsetExpressions ++ completeAggregateFunctions.flatMap(_.updateExpressions)
-        val completeAlgebraicUpdateProjection =
+        val completeUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
           val input = joinedRow(currentBuffer, row)
           // For all aggregate functions with mode Complete, update the given currentBuffer.
-          completeAlgebraicUpdateProjection.target(currentBuffer)(input)
+          completeUpdateProjection.target(currentBuffer)(input)
 
           // For all aggregate functions with mode Final, merge buffer values in row to
           // currentBuffer.
-          finalAlgebraicMergeProjection.target(currentBuffer)(input)
+          finalMergeProjection.target(currentBuffer)(input)
         }
 
       // Complete-only
       case (None, Some(Complete)) =>
-        val completeAggregateFunctions: Array[AlgebraicAggregate] =
+        val completeAggregateFunctions: Array[ExpressionAggregate] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
 
         val updateExpressions =
           completeAggregateFunctions.flatMap(_.updateExpressions)
-        val completeAlgebraicUpdateProjection =
+        val completeUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          completeAlgebraicUpdateProjection.target(currentBuffer)
+          completeUpdateProjection.target(currentBuffer)
           // For all aggregate functions with mode Complete, update the given currentBuffer.
-          completeAlgebraicUpdateProjection(joinedRow(currentBuffer, row))
+          completeUpdateProjection(joinedRow(currentBuffer, row))
         }
 
       // Grouping only.
@@ -272,7 +262,7 @@ class TungstenAggregationIterator(
   private def generateResultProjection(): (UnsafeRow, UnsafeRow) => UnsafeRow = {
 
     val groupingAttributes = groupingExpressions.map(_.toAttribute)
-    val bufferAttributes = allAggregateFunctions.flatMap(_.bufferAttributes)
+    val bufferAttributes = allAggregateFunctions.flatMap(_.aggBufferAttributes)
 
     aggregationMode match {
       // Partial-only or PartialMerge-only: every output row is basically the values of
@@ -339,7 +329,7 @@ class TungstenAggregationIterator(
   // all groups and their corresponding aggregation buffers for hash-based aggregation.
   private[this] val hashMap = new UnsafeFixedWidthAggregationMap(
     initialAggregationBuffer,
-    StructType.fromAttributes(allAggregateFunctions.flatMap(_.bufferAttributes)),
+    StructType.fromAttributes(allAggregateFunctions.flatMap(_.aggBufferAttributes)),
     StructType.fromAttributes(groupingExpressions.map(_.toAttribute)),
     TaskContext.get.taskMemoryManager(),
     SparkEnv.get.shuffleMemoryManager,
@@ -480,7 +470,7 @@ class TungstenAggregationIterator(
       // The originalInputAttributes are using cloneBufferAttributes. So, we need to use
       // allAggregateFunctions.flatMap(_.cloneBufferAttributes).
       val bufferExtractor = newMutableProjection(
-        allAggregateFunctions.flatMap(_.cloneBufferAttributes),
+        allAggregateFunctions.flatMap(_.inputAggBufferAttributes),
         originalInputAttributes)()
       bufferExtractor.target(buffer)
 
@@ -510,7 +500,7 @@ class TungstenAggregationIterator(
     // Basically the value of the KVIterator returned by externalSorter
     // will just aggregation buffer. At here, we use cloneBufferAttributes.
     val newInputAttributes: Seq[Attribute] =
-      allAggregateFunctions.flatMap(_.cloneBufferAttributes)
+      allAggregateFunctions.flatMap(_.inputAggBufferAttributes)
 
     // Set up new processRow and generateOutput.
     processRow = generateProcessRow(newInputAttributes)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
index 1114fe6552bd..fd02be1225f2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
@@ -22,7 +22,7 @@ import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateMutableProjection
 import org.apache.spark.sql.catalyst.expressions.{MutableRow, InterpretedMutableProjection, AttributeReference, Expression}
-import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateFunction2
+import org.apache.spark.sql.catalyst.expressions.aggregate.{ImperativeAggregate, AggregateFunction2}
 import org.apache.spark.sql.expressions.{MutableAggregationBuffer, UserDefinedAggregateFunction}
 import org.apache.spark.sql.types._
 
@@ -318,13 +318,11 @@ private[sql] class InputAggregationBuffer private[sql] (
 /**
  * The internal wrapper used to hook a [[UserDefinedAggregateFunction]] `udaf` in the
  * internal aggregation code path.
- * @param children
- * @param udaf
  */
 private[sql] case class ScalaUDAF(
     children: Seq[Expression],
     udaf: UserDefinedAggregateFunction)
-  extends AggregateFunction2 with Logging {
+  extends ImperativeAggregate with Logging {
 
   require(
     children.length == udaf.inputSchema.length,
@@ -339,11 +337,9 @@ private[sql] case class ScalaUDAF(
 
   override val inputTypes: Seq[DataType] = udaf.inputSchema.map(_.dataType)
 
-  override val bufferSchema: StructType = udaf.bufferSchema
+  override val aggBufferSchema: StructType = udaf.bufferSchema
 
-  override val bufferAttributes: Seq[AttributeReference] = bufferSchema.toAttributes
-
-  override lazy val cloneBufferAttributes = bufferAttributes.map(_.newInstance())
+  override val aggBufferAttributes: Seq[AttributeReference] = aggBufferSchema.toAttributes
 
   private[this] lazy val childrenSchema: StructType = {
     val inputFields = children.zipWithIndex.map {
@@ -370,13 +366,13 @@ private[sql] case class ScalaUDAF(
     CatalystTypeConverters.createToScalaConverter(childrenSchema)
 
   private[this] lazy val bufferValuesToCatalystConverters: Array[Any => Any] = {
-    bufferSchema.fields.map { field =>
+    aggBufferSchema.fields.map { field =>
       CatalystTypeConverters.createToCatalystConverter(field.dataType)
     }
   }
 
   private[this] lazy val bufferValuesToScalaConverters: Array[Any => Any] = {
-    bufferSchema.fields.map { field =>
+    aggBufferSchema.fields.map { field =>
       CatalystTypeConverters.createToScalaConverter(field.dataType)
     }
   }
@@ -398,15 +394,15 @@ private[sql] case class ScalaUDAF(
    * Sets the inputBufferOffset to newInputBufferOffset and then create a new instance of
    * `inputAggregateBuffer` based on this new inputBufferOffset.
    */
-  override def withNewInputBufferOffset(newInputBufferOffset: Int): Unit = {
-    super.withNewInputBufferOffset(newInputBufferOffset)
+  override def withNewInputAggBufferOffset(newInputBufferOffset: Int): Unit = {
+    super.withNewInputAggBufferOffset(newInputBufferOffset)
     // inputBufferOffset has been updated.
     inputAggregateBuffer =
       new InputAggregationBuffer(
-        bufferSchema,
+        aggBufferSchema,
         bufferValuesToCatalystConverters,
         bufferValuesToScalaConverters,
-        inputBufferOffset,
+        inputAggBufferOffset,
         null)
   }
 
@@ -414,22 +410,22 @@ private[sql] case class ScalaUDAF(
    * Sets the mutableBufferOffset to newMutableBufferOffset and then create a new instance of
    * `mutableAggregateBuffer` and `evalAggregateBuffer` based on this new mutableBufferOffset.
    */
-  override def withNewMutableBufferOffset(newMutableBufferOffset: Int): Unit = {
-    super.withNewMutableBufferOffset(newMutableBufferOffset)
+  override def withNewMutableAggBufferOffset(newMutableBufferOffset: Int): Unit = {
+    super.withNewMutableAggBufferOffset(newMutableBufferOffset)
     // mutableBufferOffset has been updated.
     mutableAggregateBuffer =
       new MutableAggregationBufferImpl(
-        bufferSchema,
+        aggBufferSchema,
         bufferValuesToCatalystConverters,
         bufferValuesToScalaConverters,
-        mutableBufferOffset,
+        mutableAggBufferOffset,
         null)
     evalAggregateBuffer =
       new InputAggregationBuffer(
-        bufferSchema,
+        aggBufferSchema,
         bufferValuesToCatalystConverters,
         bufferValuesToScalaConverters,
-        mutableBufferOffset,
+        mutableAggBufferOffset,
         null)
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index 4f5e86cceb8a..e1d7e1bf02fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -97,10 +97,10 @@ object Utils {
     // Check if we can use TungstenAggregate.
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
-      aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[AlgebraicAggregate]) &&
+      aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[ExpressionAggregate]) &&
       supportsTungstenAggregate(
         groupingExpressions,
-        aggregateExpressions.flatMap(_.aggregateFunction.bufferAttributes))
+        aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
 
     // 1. Create an Aggregate Operator for partial aggregations.
@@ -117,10 +117,10 @@ object Utils {
     val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
     val partialAggregateExpressions = aggregateExpressions.map(_.copy(mode = Partial))
     val partialAggregateAttributes =
-      partialAggregateExpressions.flatMap(_.aggregateFunction.bufferAttributes)
+      partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialResultExpressions =
       namedGroupingAttributes ++
-        partialAggregateExpressions.flatMap(_.aggregateFunction.cloneBufferAttributes)
+        partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
 
     val partialAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
@@ -128,7 +128,6 @@ object Utils {
         groupingExpressions = namedGroupingExpressions.map(_._2),
         nonCompleteAggregateExpressions = partialAggregateExpressions,
         completeAggregateExpressions = Nil,
-        initialInputBufferOffset = 0,
         resultExpressions = partialResultExpressions,
         child = child)
     } else {
@@ -158,7 +157,7 @@ object Utils {
             // aggregateFunctionMap contains unique aggregate functions.
             val aggregateFunction =
               aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._1
-            aggregateFunction.asInstanceOf[AlgebraicAggregate].evaluateExpression
+            aggregateFunction.asInstanceOf[ExpressionAggregate].evaluateExpression
           case expression =>
             // We do not rely on the equality check at here since attributes may
             // different cosmetically. Instead, we use semanticEquals.
@@ -173,7 +172,6 @@ object Utils {
         groupingExpressions = namedGroupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
         completeAggregateExpressions = Nil,
-        initialInputBufferOffset = namedGroupingAttributes.length,
         resultExpressions = rewrittenResultExpressions,
         child = partialAggregate)
     } else {
@@ -216,10 +214,11 @@ object Utils {
     val aggregateExpressions = functionsWithDistinct ++ functionsWithoutDistinct
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
-        aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[AlgebraicAggregate]) &&
+        aggregateExpressions.forall(
+          _.aggregateFunction.isInstanceOf[ExpressionAggregate]) &&
         supportsTungstenAggregate(
           groupingExpressions,
-          aggregateExpressions.flatMap(_.aggregateFunction.bufferAttributes))
+          aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
     // 1. Create an Aggregate Operator for partial aggregations.
     // The grouping expressions are original groupingExpressions and
@@ -252,20 +251,19 @@ object Utils {
 
     val partialAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Partial))
     val partialAggregateAttributes =
-      partialAggregateExpressions.flatMap(_.aggregateFunction.bufferAttributes)
+      partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialAggregateGroupingExpressions =
       (namedGroupingExpressions ++ namedDistinctColumnExpressions).map(_._2)
     val partialAggregateResult =
       namedGroupingAttributes ++
         distinctColumnAttributes ++
-        partialAggregateExpressions.flatMap(_.aggregateFunction.cloneBufferAttributes)
+        partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
     val partialAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
         requiredChildDistributionExpressions = None: Option[Seq[Expression]],
         groupingExpressions = partialAggregateGroupingExpressions,
         nonCompleteAggregateExpressions = partialAggregateExpressions,
         completeAggregateExpressions = Nil,
-        initialInputBufferOffset = 0,
         resultExpressions = partialAggregateResult,
         child = child)
     } else {
@@ -284,18 +282,17 @@ object Utils {
     // 2. Create an Aggregate Operator for partial merge aggregations.
     val partialMergeAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = PartialMerge))
     val partialMergeAggregateAttributes =
-      partialMergeAggregateExpressions.flatMap(_.aggregateFunction.bufferAttributes)
+      partialMergeAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialMergeAggregateResult =
       namedGroupingAttributes ++
         distinctColumnAttributes ++
-        partialMergeAggregateExpressions.flatMap(_.aggregateFunction.cloneBufferAttributes)
+        partialMergeAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
     val partialMergeAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
         requiredChildDistributionExpressions = Some(namedGroupingAttributes),
         groupingExpressions = namedGroupingAttributes ++ distinctColumnAttributes,
         nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
         completeAggregateExpressions = Nil,
-        initialInputBufferOffset = (namedGroupingAttributes ++ distinctColumnAttributes).length,
         resultExpressions = partialMergeAggregateResult,
         child = partialAggregate)
     } else {
@@ -362,7 +359,7 @@ object Utils {
                 // aggregate functions that have not been rewritten.
                 aggregateFunctionMap(function, isDistinct)._1
               }
-            aggregateFunction.asInstanceOf[AlgebraicAggregate].evaluateExpression
+            aggregateFunction.asInstanceOf[ExpressionAggregate].evaluateExpression
           case expression =>
             // We do not rely on the equality check at here since attributes may
             // different cosmetically. Instead, we use semanticEquals.
@@ -377,7 +374,6 @@ object Utils {
         groupingExpressions = namedGroupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
         completeAggregateExpressions = completeAggregateExpressions,
-        initialInputBufferOffset = (namedGroupingAttributes ++ distinctColumnAttributes).length,
         resultExpressions = rewrittenResultExpressions,
         child = partialMergeAggregate)
     } else {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
index afda0d29f6d9..7ca677a6c72a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
@@ -38,7 +38,7 @@ class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLConte
         () => new InterpretedMutableProjection(expr, schema)
       }
       val dummyAccum = SQLMetrics.createLongMetric(sparkContext, "dummy")
-      iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty, 0,
+      iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty,
         Seq.empty, newMutableProjection, Seq.empty, None, dummyAccum, dummyAccum)
       val numPages = iter.getHashMap.getNumDataPages
       assert(numPages === 1)
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index a85d4db88d7e..18bbdb990814 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -554,7 +554,7 @@ private[hive] case class HiveUDAFFunction(
     funcWrapper: HiveFunctionWrapper,
     children: Seq[Expression],
     isUDAFBridgeRequired: Boolean = false)
-  extends AggregateFunction2 with HiveInspectors {
+  extends ImperativeAggregate with HiveInspectors {
 
   def this() = this(null, null)
 
@@ -598,7 +598,7 @@ private[hive] case class HiveUDAFFunction(
 
   // Hive UDAF has its own buffer, so we don't need to occupy a slot in the aggregation
   // buffer for it.
-  override def bufferSchema: StructType = StructType(Nil)
+  override def aggBufferSchema: StructType = StructType(Nil)
 
   override def update(_buffer: MutableRow, input: InternalRow): Unit = {
     val inputs = inputProjection(input)
@@ -610,13 +610,11 @@ private[hive] case class HiveUDAFFunction(
       "Hive UDAF doesn't support partial aggregate")
   }
 
-  override def cloneBufferAttributes: Seq[Attribute] = Nil
-
   override def initialize(_buffer: MutableRow): Unit = {
     buffer = function.getNewAggregationBuffer
   }
 
-  override def bufferAttributes: Seq[AttributeReference] = Nil
+  override def aggBufferAttributes: Seq[AttributeReference] = Nil
 
   // We rely on Hive to check the input data types, so use `AnyDataType` here to bypass our
   // catalyst type checking framework.
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 24b1846923c7..c9e1bb199591 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -343,7 +343,7 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         Row(null, null, 110.0, null, null, 10.0) :: Nil)
   }
 
-  test("non-AlgebraicAggregate aggreguate function") {
+  test("interpreted aggregate function") {
     checkAnswer(
       sqlContext.sql(
         """
@@ -368,7 +368,7 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
       Row(null) :: Nil)
   }
 
-  test("non-AlgebraicAggregate and AlgebraicAggregate aggreguate function") {
+  test("interpreted and expression-based aggregation functions") {
     checkAnswer(
       sqlContext.sql(
         """

From 94fc57afdf8ac6be35f13956232b6cf58857d047 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 7 Oct 2015 14:11:21 -0700
Subject: [PATCH 160/896] [SPARK-10300] [BUILD] [TESTS] Add support for test
 tags in run-tests.py.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8775 from vanzin/SPARK-10300.
---
 bagel/pom.xml                                 |  4 ++
 core/pom.xml                                  | 14 ++----
 dev/run-tests.py                              | 19 ++++++-
 dev/sparktestsupport/modules.py               | 24 ++++++++-
 external/flume-sink/pom.xml                   |  4 ++
 external/flume/pom.xml                        | 10 +---
 external/kafka/pom.xml                        | 10 +---
 external/mqtt/pom.xml                         | 14 ++----
 external/twitter/pom.xml                      | 10 +---
 external/zeromq/pom.xml                       | 10 +---
 extras/java8-tests/pom.xml                    | 10 +---
 extras/kinesis-asl/pom.xml                    |  5 +-
 graphx/pom.xml                                |  4 ++
 launcher/pom.xml                              | 10 ++--
 mllib/pom.xml                                 | 14 ++----
 network/common/pom.xml                        | 14 ++----
 network/shuffle/pom.xml                       | 10 +---
 network/yarn/pom.xml                          |  4 ++
 pom.xml                                       | 24 ++++++++-
 project/SparkBuild.scala                      | 19 +++++--
 repl/pom.xml                                  |  4 ++
 sql/catalyst/pom.xml                          |  4 ++
 sql/core/pom.xml                              |  9 ++--
 sql/hive-thriftserver/pom.xml                 |  4 ++
 .../execution/HiveCompatibilitySuite.scala    |  2 +
 sql/hive/pom.xml                              |  9 ++--
 .../spark/sql/hive/client/VersionsSuite.scala |  2 +
 streaming/pom.xml                             | 14 ++----
 tags/pom.xml                                  | 50 +++++++++++++++++++
 .../apache/spark/tags/ExtendedHiveTest.java   | 26 ++++++++++
 .../apache/spark/tags/ExtendedYarnTest.java   | 26 ++++++++++
 unsafe/pom.xml                                | 10 +---
 yarn/pom.xml                                  |  4 ++
 .../spark/deploy/yarn/YarnClusterSuite.scala  |  2 +
 .../yarn/YarnShuffleIntegrationSuite.scala    |  2 +
 35 files changed, 267 insertions(+), 134 deletions(-)
 create mode 100644 tags/pom.xml
 create mode 100644 tags/src/main/java/org/apache/spark/tags/ExtendedHiveTest.java
 create mode 100644 tags/src/main/java/org/apache/spark/tags/ExtendedYarnTest.java

diff --git a/bagel/pom.xml b/bagel/pom.xml
index 3baf8d47b4dc..672e9469aec9 100644
--- a/bagel/pom.xml
+++ b/bagel/pom.xml
@@ -52,6 +52,10 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/core/pom.xml b/core/pom.xml
index e31d90f60889..c0af98a04fb1 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -331,16 +331,6 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.apache.curator</groupId>
       <artifactId>curator-test</artifactId>
@@ -362,6 +352,10 @@
       <artifactId>py4j</artifactId>
       <version>0.8.2.1</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/dev/run-tests.py b/dev/run-tests.py
index d8b22e1665e7..1a816585187d 100755
--- a/dev/run-tests.py
+++ b/dev/run-tests.py
@@ -118,6 +118,14 @@ def determine_modules_to_test(changed_modules):
     return modules_to_test.union(set(changed_modules))
 
 
+def determine_tags_to_exclude(changed_modules):
+    tags = []
+    for m in modules.all_modules:
+        if m not in changed_modules:
+            tags += m.test_tags
+    return tags
+
+
 # -------------------------------------------------------------------------------------------------
 # Functions for working with subprocesses and shell tools
 # -------------------------------------------------------------------------------------------------
@@ -369,6 +377,7 @@ def detect_binary_inop_with_mima():
 
 def run_scala_tests_maven(test_profiles):
     mvn_test_goals = ["test", "--fail-at-end"]
+
     profiles_and_goals = test_profiles + mvn_test_goals
 
     print("[info] Running Spark tests using Maven with these arguments: ",
@@ -392,7 +401,7 @@ def run_scala_tests_sbt(test_modules, test_profiles):
     exec_sbt(profiles_and_goals)
 
 
-def run_scala_tests(build_tool, hadoop_version, test_modules):
+def run_scala_tests(build_tool, hadoop_version, test_modules, excluded_tags):
     """Function to properly execute all tests passed in as a set from the
     `determine_test_suites` function"""
     set_title_and_block("Running Spark unit tests", "BLOCK_SPARK_UNIT_TESTS")
@@ -401,6 +410,10 @@ def run_scala_tests(build_tool, hadoop_version, test_modules):
 
     test_profiles = get_hadoop_profiles(hadoop_version) + \
         list(set(itertools.chain.from_iterable(m.build_profile_flags for m in test_modules)))
+
+    if excluded_tags:
+        test_profiles += ['-Dtest.exclude.tags=' + ",".join(excluded_tags)]
+
     if build_tool == "maven":
         run_scala_tests_maven(test_profiles)
     else:
@@ -500,8 +513,10 @@ def main():
         target_branch = os.environ["ghprbTargetBranch"]
         changed_files = identify_changed_files_from_git_commits("HEAD", target_branch=target_branch)
         changed_modules = determine_modules_for_files(changed_files)
+        excluded_tags = determine_tags_to_exclude(changed_modules)
     if not changed_modules:
         changed_modules = [modules.root]
+        excluded_tags = []
     print("[info] Found the following changed modules:",
           ", ".join(x.name for x in changed_modules))
 
@@ -541,7 +556,7 @@ def main():
         detect_binary_inop_with_mima()
 
     # run the test suites
-    run_scala_tests(build_tool, hadoop_version, test_modules)
+    run_scala_tests(build_tool, hadoop_version, test_modules, excluded_tags)
 
     modules_with_python_tests = [m for m in test_modules if m.python_test_goals]
     if modules_with_python_tests:
diff --git a/dev/sparktestsupport/modules.py b/dev/sparktestsupport/modules.py
index 346452f3174e..d65547e04db4 100644
--- a/dev/sparktestsupport/modules.py
+++ b/dev/sparktestsupport/modules.py
@@ -31,7 +31,7 @@ class Module(object):
 
     def __init__(self, name, dependencies, source_file_regexes, build_profile_flags=(), environ={},
                  sbt_test_goals=(), python_test_goals=(), blacklisted_python_implementations=(),
-                 should_run_r_tests=False):
+                 test_tags=(), should_run_r_tests=False):
         """
         Define a new module.
 
@@ -50,6 +50,8 @@ def __init__(self, name, dependencies, source_file_regexes, build_profile_flags=
         :param blacklisted_python_implementations: A set of Python implementations that are not
             supported by this module's Python components. The values in this set should match
             strings returned by Python's `platform.python_implementation()`.
+        :param test_tags A set of tags that will be excluded when running unit tests if the module
+            is not explicitly changed.
         :param should_run_r_tests: If true, changes in this module will trigger all R tests.
         """
         self.name = name
@@ -60,6 +62,7 @@ def __init__(self, name, dependencies, source_file_regexes, build_profile_flags=
         self.environ = environ
         self.python_test_goals = python_test_goals
         self.blacklisted_python_implementations = blacklisted_python_implementations
+        self.test_tags = test_tags
         self.should_run_r_tests = should_run_r_tests
 
         self.dependent_modules = set()
@@ -85,6 +88,9 @@ def contains_file(self, filename):
         "catalyst/test",
         "sql/test",
         "hive/test",
+    ],
+    test_tags=[
+        "org.apache.spark.tags.ExtendedHiveTest"
     ]
 )
 
@@ -398,6 +404,22 @@ def contains_file(self, filename):
 )
 
 
+yarn = Module(
+    name="yarn",
+    dependencies=[],
+    source_file_regexes=[
+        "yarn/",
+        "network/yarn/",
+    ],
+    sbt_test_goals=[
+        "yarn/test",
+        "network-yarn/test",
+    ],
+    test_tags=[
+        "org.apache.spark.tags.ExtendedYarnTest"
+    ]
+)
+
 # The root module is a dummy module which is used to run all of the tests.
 # No other modules should directly depend on this module.
 root = Module(
diff --git a/external/flume-sink/pom.xml b/external/flume-sink/pom.xml
index d7c2ac474a18..75113ff753e7 100644
--- a/external/flume-sink/pom.xml
+++ b/external/flume-sink/pom.xml
@@ -90,6 +90,10 @@
       <version>3.4.0.Final</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/external/flume/pom.xml b/external/flume/pom.xml
index 132062f94fb4..57f83607365d 100644
--- a/external/flume/pom.xml
+++ b/external/flume/pom.xml
@@ -67,14 +67,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
   <build>
diff --git a/external/kafka/pom.xml b/external/kafka/pom.xml
index 05abd9e2e681..79258c126e04 100644
--- a/external/kafka/pom.xml
+++ b/external/kafka/pom.xml
@@ -87,14 +87,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
   <build>
diff --git a/external/mqtt/pom.xml b/external/mqtt/pom.xml
index 05e6338a08b0..59fba8b826b4 100644
--- a/external/mqtt/pom.xml
+++ b/external/mqtt/pom.xml
@@ -58,22 +58,16 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.apache.activemq</groupId>
       <artifactId>activemq-core</artifactId>
       <version>5.7.0</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/external/twitter/pom.xml b/external/twitter/pom.xml
index 244ad58ae959..4c22ec8b3b15 100644
--- a/external/twitter/pom.xml
+++ b/external/twitter/pom.xml
@@ -59,14 +59,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
   <build>
diff --git a/external/zeromq/pom.xml b/external/zeromq/pom.xml
index 171df8682c84..02d6b8128157 100644
--- a/external/zeromq/pom.xml
+++ b/external/zeromq/pom.xml
@@ -58,14 +58,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
   <build>
diff --git a/extras/java8-tests/pom.xml b/extras/java8-tests/pom.xml
index 81794a853631..4ce90e75fd35 100644
--- a/extras/java8-tests/pom.xml
+++ b/extras/java8-tests/pom.xml
@@ -59,14 +59,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
 
diff --git a/extras/kinesis-asl/pom.xml b/extras/kinesis-asl/pom.xml
index 6dd8ff69c294..ef72d97eae69 100644
--- a/extras/kinesis-asl/pom.xml
+++ b/extras/kinesis-asl/pom.xml
@@ -75,9 +75,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
   </dependencies>
   <build>
diff --git a/graphx/pom.xml b/graphx/pom.xml
index 202fc19002d1..987b831021a5 100644
--- a/graphx/pom.xml
+++ b/graphx/pom.xml
@@ -66,6 +66,10 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/launcher/pom.xml b/launcher/pom.xml
index ed38e66aa246..d595d74642ab 100644
--- a/launcher/pom.xml
+++ b/launcher/pom.xml
@@ -42,11 +42,6 @@
       <artifactId>log4j</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
@@ -63,6 +58,11 @@
       <scope>test</scope>
     </dependency>
 
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
+
     <!-- Not needed by the test code, but referenced by SparkSubmit which is used by the tests. -->
     <dependency>
       <groupId>org.apache.hadoop</groupId>
diff --git a/mllib/pom.xml b/mllib/pom.xml
index 22c0c6008ba3..70139121d8c7 100644
--- a/mllib/pom.xml
+++ b/mllib/pom.xml
@@ -94,16 +94,6 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
@@ -131,6 +121,10 @@
         </exclusion>
       </exclusions>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <profiles>
     <profile>
diff --git a/network/common/pom.xml b/network/common/pom.xml
index 1cc054a8936c..9af6cc5e925f 100644
--- a/network/common/pom.xml
+++ b/network/common/pom.xml
@@ -64,21 +64,15 @@
     </dependency>
 
     <!-- Test dependencies -->
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>log4j</groupId>
       <artifactId>log4j</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
diff --git a/network/shuffle/pom.xml b/network/shuffle/pom.xml
index 7a66c968041c..70ba5cb1995b 100644
--- a/network/shuffle/pom.xml
+++ b/network/shuffle/pom.xml
@@ -79,14 +79,8 @@
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>
diff --git a/network/yarn/pom.xml b/network/yarn/pom.xml
index e745180eace7..541ed9a8d0ab 100644
--- a/network/yarn/pom.xml
+++ b/network/yarn/pom.xml
@@ -44,6 +44,10 @@
       <artifactId>spark-network-shuffle_${scala.binary.version}</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
 
     <!-- Provided dependencies -->
     <dependency>
diff --git a/pom.xml b/pom.xml
index d04ed1e79865..445e65c0459b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -86,6 +86,7 @@
   </mailingLists>
 
   <modules>
+    <module>tags</module>
     <module>core</module>
     <module>bagel</module> <!-- Deprecated -->
     <module>graphx</module>
@@ -181,6 +182,7 @@
     <libthrift.version>0.9.2</libthrift.version>
 
     <test.java.home>${java.home}</test.java.home>
+    <test.exclude.tags></test.exclude.tags>
 
     <!--
       Dependency scopes that can be overridden by enabling certain profiles. These profiles are
@@ -339,9 +341,25 @@
       <artifactId>scalatest_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.novocode</groupId>
+      <artifactId>junit-interface</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>org.apache.spark</groupId>
+        <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+        <version>${project.version}</version>
+        <scope>test</scope>
+      </dependency>
       <dependency>
         <groupId>com.twitter</groupId>
         <artifactId>chill_${scala.binary.version}</artifactId>
@@ -742,7 +760,7 @@
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
-        <version>4.10</version>
+        <version>4.11</version>
         <scope>test</scope>
       </dependency>
       <dependency>
@@ -760,7 +778,7 @@
       <dependency>
         <groupId>com.novocode</groupId>
         <artifactId>junit-interface</artifactId>
-        <version>0.10</version>
+        <version>0.11</version>
         <scope>test</scope>
       </dependency>
       <dependency>
@@ -1915,6 +1933,7 @@
               <test.src.tables>src</test.src.tables>
             </systemProperties>
             <failIfNoTests>false</failIfNoTests>
+            <excludedGroups>${test.exclude.tags}</excludedGroups>
           </configuration>
         </plugin>
         <!-- Scalatest runs all Scala tests -->
@@ -1952,6 +1971,7 @@
               <!-- Needed by sql/hive tests. -->
               <test.src.tables>__not_used__</test.src.tables>
             </systemProperties>
+            <tagsToExclude>${test.exclude.tags}</tagsToExclude>
           </configuration>
           <executions>
             <execution>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 901cfa538d23..1339980c3880 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -35,11 +35,11 @@ object BuildCommons {
 
   val allProjects@Seq(bagel, catalyst, core, graphx, hive, hiveThriftServer, mllib, repl,
     sql, networkCommon, networkShuffle, streaming, streamingFlumeSink, streamingFlume, streamingKafka,
-    streamingMqtt, streamingTwitter, streamingZeromq, launcher, unsafe) =
+    streamingMqtt, streamingTwitter, streamingZeromq, launcher, unsafe, testTags) =
     Seq("bagel", "catalyst", "core", "graphx", "hive", "hive-thriftserver", "mllib", "repl",
       "sql", "network-common", "network-shuffle", "streaming", "streaming-flume-sink",
       "streaming-flume", "streaming-kafka", "streaming-mqtt", "streaming-twitter",
-      "streaming-zeromq", "launcher", "unsafe").map(ProjectRef(buildLocation, _))
+      "streaming-zeromq", "launcher", "unsafe", "test-tags").map(ProjectRef(buildLocation, _))
 
   val optionallyEnabledProjects@Seq(yarn, yarnStable, java8Tests, sparkGangliaLgpl,
     streamingKinesisAsl) = Seq("yarn", "yarn-stable", "java8-tests", "ganglia-lgpl",
@@ -202,7 +202,7 @@ object SparkBuild extends PomBuild {
   (allProjects ++ optionallyEnabledProjects).foreach(enable(TestSettings.settings))
 
   allProjects.filterNot(x => Seq(spark, hive, hiveThriftServer, catalyst, repl,
-    networkCommon, networkShuffle, networkYarn, unsafe).contains(x)).foreach {
+    networkCommon, networkShuffle, networkYarn, unsafe, testTags).contains(x)).foreach {
       x => enable(MimaBuild.mimaSettings(sparkHome, x))(x)
     }
 
@@ -567,11 +567,20 @@ object TestSettings {
     javaOptions in Test ++= "-Xmx3g -Xss4096k -XX:PermSize=128M -XX:MaxNewSize=256m -XX:MaxPermSize=1g"
       .split(" ").toSeq,
     javaOptions += "-Xmx3g",
+    // Exclude tags defined in a system property
+    testOptions in Test += Tests.Argument(TestFrameworks.ScalaTest,
+      sys.props.get("test.exclude.tags").map { tags =>
+        tags.split(",").flatMap { tag => Seq("-l", tag) }.toSeq
+      }.getOrElse(Nil): _*),
+    testOptions in Test += Tests.Argument(TestFrameworks.JUnit,
+      sys.props.get("test.exclude.tags").map { tags =>
+        Seq("--exclude-categories=" + tags)
+      }.getOrElse(Nil): _*),
     // Show full stack trace and duration in test cases.
     testOptions in Test += Tests.Argument("-oDF"),
-    testOptions += Tests.Argument(TestFrameworks.JUnit, "-v", "-a"),
+    testOptions in Test += Tests.Argument(TestFrameworks.JUnit, "-v", "-a"),
     // Enable Junit testing.
-    libraryDependencies += "com.novocode" % "junit-interface" % "0.9" % "test",
+    libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % "test",
     // Only allow one test at a time, even across projects, since they run in the same JVM
     parallelExecution in Test := false,
     // Make sure the test temp directory exists.
diff --git a/repl/pom.xml b/repl/pom.xml
index 5cf416a4a544..fb0a0e1286c8 100644
--- a/repl/pom.xml
+++ b/repl/pom.xml
@@ -91,6 +91,10 @@
       <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
 
     <!-- Explicit listing of transitive deps that are shaded. Otherwise, odd compiler crashes. -->
     <dependency>
diff --git a/sql/catalyst/pom.xml b/sql/catalyst/pom.xml
index 6cfd53e868f8..61d6fc63554b 100644
--- a/sql/catalyst/pom.xml
+++ b/sql/catalyst/pom.xml
@@ -53,6 +53,10 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.spark</groupId>
       <artifactId>spark-unsafe_${scala.binary.version}</artifactId>
diff --git a/sql/core/pom.xml b/sql/core/pom.xml
index 465aa3a3888c..c96855e261ee 100644
--- a/sql/core/pom.xml
+++ b/sql/core/pom.xml
@@ -60,6 +60,10 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.parquet</groupId>
       <artifactId>parquet-column</artifactId>
@@ -73,11 +77,6 @@
       <artifactId>jackson-databind</artifactId>
       <version>${fasterxml.jackson.version}</version>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.scalacheck</groupId>
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
diff --git a/sql/hive-thriftserver/pom.xml b/sql/hive-thriftserver/pom.xml
index f7fe085f34d8..b5b2143292a6 100644
--- a/sql/hive-thriftserver/pom.xml
+++ b/sql/hive-thriftserver/pom.xml
@@ -93,6 +93,10 @@
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
index ab309e0a1d36..8f29fa91f7eb 100644
--- a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
+++ b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
@@ -25,10 +25,12 @@ import org.scalatest.BeforeAndAfter
 
 import org.apache.spark.sql.SQLConf
 import org.apache.spark.sql.hive.test.TestHive
+import org.apache.spark.tags.ExtendedHiveTest
 
 /**
  * Runs the test cases that are included in the hive distribution.
  */
+@ExtendedHiveTest
 class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
   // TODO: bundle in jar files... get from classpath
   private lazy val hiveQueryDir = TestHive.getHiveFile(
diff --git a/sql/hive/pom.xml b/sql/hive/pom.xml
index ac67fe5f47be..d96f3e2b9f62 100644
--- a/sql/hive/pom.xml
+++ b/sql/hive/pom.xml
@@ -58,6 +58,10 @@
       <artifactId>spark-sql_${scala.binary.version}</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
 <!--
     <dependency>
       <groupId>com.google.guava</groupId>
@@ -160,11 +164,6 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.apache.spark</groupId>
       <artifactId>spark-sql_${scala.binary.version}</artifactId>
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
index f0bb77092c0c..2da22ec2379f 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
@@ -24,6 +24,7 @@ import org.apache.spark.{Logging, SparkFunSuite}
 import org.apache.spark.sql.catalyst.expressions.{NamedExpression, Literal, AttributeReference, EqualTo}
 import org.apache.spark.sql.catalyst.util.quietly
 import org.apache.spark.sql.types.IntegerType
+import org.apache.spark.tags.ExtendedHiveTest
 import org.apache.spark.util.Utils
 
 /**
@@ -32,6 +33,7 @@ import org.apache.spark.util.Utils
  * sure that reflective calls are not throwing NoSuchMethod error, but the actually functionality
  * is not fully tested.
  */
+@ExtendedHiveTest
 class VersionsSuite extends SparkFunSuite with Logging {
 
   // Do not use a temp path here to speed up subsequent executions of the unit test during
diff --git a/streaming/pom.xml b/streaming/pom.xml
index 5cc9001b0e9a..145c8a7321c0 100644
--- a/streaming/pom.xml
+++ b/streaming/pom.xml
@@ -47,6 +47,10 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
 
     <!-- Explicit listing of transitive deps that are shaded. Otherwise, odd compiler crashes. -->
     <dependency>
@@ -84,21 +88,11 @@
       <artifactId>scalacheck_${scala.binary.version}</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.seleniumhq.selenium</groupId>
       <artifactId>selenium-java</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/tags/pom.xml b/tags/pom.xml
new file mode 100644
index 000000000000..ca93722e7334
--- /dev/null
+++ b/tags/pom.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.spark</groupId>
+    <artifactId>spark-parent_2.10</artifactId>
+    <version>1.6.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <groupId>org.apache.spark</groupId>
+  <artifactId>spark-test-tags_2.10</artifactId>
+  <packaging>jar</packaging>
+  <name>Spark Project Test Tags</name>
+  <url>http://spark.apache.org/</url>
+  <properties>
+    <sbt.project.name>test-tags</sbt.project.name>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.scalatest</groupId>
+      <artifactId>scalatest_${scala.binary.version}</artifactId>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
+    <testOutputDirectory>target/scala-${scala.binary.version}/test-classes</testOutputDirectory>
+  </build>
+</project>
diff --git a/tags/src/main/java/org/apache/spark/tags/ExtendedHiveTest.java b/tags/src/main/java/org/apache/spark/tags/ExtendedHiveTest.java
new file mode 100644
index 000000000000..1b0c416b0fe4
--- /dev/null
+++ b/tags/src/main/java/org/apache/spark/tags/ExtendedHiveTest.java
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.tags;
+
+import java.lang.annotation.*;
+import org.scalatest.TagAnnotation;
+
+@TagAnnotation
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.TYPE})
+public @interface ExtendedHiveTest { }
diff --git a/tags/src/main/java/org/apache/spark/tags/ExtendedYarnTest.java b/tags/src/main/java/org/apache/spark/tags/ExtendedYarnTest.java
new file mode 100644
index 000000000000..2a631bfc88cf
--- /dev/null
+++ b/tags/src/main/java/org/apache/spark/tags/ExtendedYarnTest.java
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.tags;
+
+import java.lang.annotation.*;
+import org.scalatest.TagAnnotation;
+
+@TagAnnotation
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.TYPE})
+public @interface ExtendedYarnTest { }
diff --git a/unsafe/pom.xml b/unsafe/pom.xml
index 066abe92e51c..caf1f77890b5 100644
--- a/unsafe/pom.xml
+++ b/unsafe/pom.xml
@@ -56,14 +56,8 @@
 
     <!-- Test dependencies -->
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>com.novocode</groupId>
-      <artifactId>junit-interface</artifactId>
-      <scope>test</scope>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
diff --git a/yarn/pom.xml b/yarn/pom.xml
index d8e4a4bbead8..3eadacba13e1 100644
--- a/yarn/pom.xml
+++ b/yarn/pom.xml
@@ -51,6 +51,10 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-yarn-api</artifactId>
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
index b5a42fd6afd9..f1601cd16100 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
@@ -32,6 +32,7 @@ import org.apache.spark.launcher.TestClasspathBuilder
 import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationStart,
   SparkListenerExecutorAdded}
 import org.apache.spark.scheduler.cluster.ExecutorInfo
+import org.apache.spark.tags.ExtendedYarnTest
 import org.apache.spark.util.Utils
 
 /**
@@ -39,6 +40,7 @@ import org.apache.spark.util.Utils
  * applications, and require the Spark assembly to be built before they can be successfully
  * run.
  */
+@ExtendedYarnTest
 class YarnClusterSuite extends BaseYarnClusterSuite {
 
   override def newYarnConfig(): YarnConfiguration = new YarnConfiguration()
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
index 8d9c9b3004ed..a85e5772a0fa 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
@@ -28,10 +28,12 @@ import org.scalatest.Matchers
 import org.apache.spark._
 import org.apache.spark.network.shuffle.ShuffleTestAccessor
 import org.apache.spark.network.yarn.{YarnShuffleService, YarnTestAccessor}
+import org.apache.spark.tags.ExtendedYarnTest
 
 /**
  * Integration test for the external shuffle service with a yarn mini-cluster
  */
+@ExtendedYarnTest
 class YarnShuffleIntegrationSuite extends BaseYarnClusterSuite {
 
   override def newYarnConfig(): YarnConfiguration = {

From c14aee4da97d4a7fcc8a2565a159edc74a5c8e10 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Wed, 7 Oct 2015 14:49:08 -0700
Subject: [PATCH 161/896] [SPARK-10856][SQL] Mapping TimestampType to DATETIME
 for SQL Server jdbc dialect

JIRA: https://issues.apache.org/jira/browse/SPARK-10856

For Microsoft SQL Server, TimestampType should be mapped to DATETIME instead of TIMESTAMP.

Related information for the datatype mapping: https://msdn.microsoft.com/en-us/library/ms378878(v=sql.110).aspx

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8978 from viirya/mysql-jdbc-timestamp.
---
 .../main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index c70fea1c3f50..5abbfbf7b318 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -277,4 +277,9 @@ case object MsSqlServerDialect extends JdbcDialect {
       Some(StringType)
     } else None
   }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case TimestampType => Some(JdbcType("DATETIME", java.sql.Types.TIMESTAMP))
+    case _ => None
+  }
 }

From 713e4f44e92f25f1092c898923f77249934f38b2 Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Wed, 7 Oct 2015 14:56:02 -0700
Subject: [PATCH 162/896] [SPARK-10679] [CORE] javax.jdo.JDOFatalUserException
 in executor

HadoopRDD throws exception in executor, something like below.
{noformat}
5/09/17 18:51:21 INFO metastore.HiveMetaStore: 0: Opening raw store with implemenation class:org.apache.hadoop.hive.metastore.ObjectStore
15/09/17 18:51:21 INFO metastore.ObjectStore: ObjectStore, initialize called
15/09/17 18:51:21 WARN metastore.HiveMetaStore: Retrying creating default database after error: Class org.datanucleus.api.jdo.JDOPersistenceManagerFactory was not found.
javax.jdo.JDOFatalUserException: Class org.datanucleus.api.jdo.JDOPersistenceManagerFactory was not found.
	at javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1175)
	at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:808)
	at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:701)
	at org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:365)
	at org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:394)
	at org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:291)
	at org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:258)
	at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)
	at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
	at org.apache.hadoop.hive.metastore.RawStoreProxy.<init>(RawStoreProxy.java:57)
	at org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:66)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStore(HiveMetaStore.java:593)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:571)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:620)
	at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:461)
	at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:66)
	at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:72)
	at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:5762)
	at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:199)
	at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:74)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1521)
	at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:86)
	at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:132)
	at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:104)
	at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3005)
	at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3024)
	at org.apache.hadoop.hive.ql.metadata.Hive.getAllDatabases(Hive.java:1234)
	at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:174)
	at org.apache.hadoop.hive.ql.metadata.Hive.<clinit>(Hive.java:166)
	at org.apache.hadoop.hive.ql.plan.PlanUtils.configureJobPropertiesForStorageHandler(PlanUtils.java:803)
	at org.apache.hadoop.hive.ql.plan.PlanUtils.configureInputJobPropertiesForStorageHandler(PlanUtils.java:782)
	at org.apache.spark.sql.hive.HadoopTableReader$.initializeLocalJobConfFunc(TableReader.scala:298)
	at org.apache.spark.sql.hive.HadoopTableReader$$anonfun$12.apply(TableReader.scala:274)
	at org.apache.spark.sql.hive.HadoopTableReader$$anonfun$12.apply(TableReader.scala:274)
	at org.apache.spark.rdd.HadoopRDD$$anonfun$getJobConf$6.apply(HadoopRDD.scala:176)
	at org.apache.spark.rdd.HadoopRDD$$anonfun$getJobConf$6.apply(HadoopRDD.scala:176)
	at scala.Option.map(Option.scala:145)
	at org.apache.spark.rdd.HadoopRDD.getJobConf(HadoopRDD.scala:176)
	at org.apache.spark.rdd.HadoopRDD$$anon$1.<init>(HadoopRDD.scala:220)
	at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:216)
	at org.apache.spark.rdd.HadoopRDD.compute(HadoopRDD.scala:101)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.rdd.UnionRDD.compute(UnionRDD.scala:87)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:297)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:264)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
	at org.apache.spark.scheduler.Task.run(Task.scala:88)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
{noformat}

Author: navis.ryu <navis@apache.org>

Closes #8804 from navis/SPARK-10679.
---
 .../apache/spark/sql/hive/TableReader.scala   | 31 +++++++++++++++++--
 .../spark/sql/hive/hiveWriterContainers.scala |  4 +--
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
index e35468a624c3..69f481c49a65 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
@@ -17,12 +17,14 @@
 
 package org.apache.spark.sql.hive
 
+import java.util
+
 import org.apache.hadoop.fs.{Path, PathFilter}
 import org.apache.hadoop.hive.conf.HiveConf
 import org.apache.hadoop.hive.metastore.api.hive_metastoreConstants._
 import org.apache.hadoop.hive.ql.exec.Utilities
-import org.apache.hadoop.hive.ql.metadata.{Partition => HivePartition, Table => HiveTable}
-import org.apache.hadoop.hive.ql.plan.{PlanUtils, TableDesc}
+import org.apache.hadoop.hive.ql.metadata.{Partition => HivePartition, Table => HiveTable, Hive, HiveUtils, HiveStorageHandler}
+import org.apache.hadoop.hive.ql.plan.TableDesc
 import org.apache.hadoop.hive.serde2.Deserializer
 import org.apache.hadoop.hive.serde2.objectinspector.primitive._
 import org.apache.hadoop.hive.serde2.objectinspector.{ObjectInspectorConverters, StructObjectInspector}
@@ -287,6 +289,29 @@ class HadoopTableReader(
   }
 }
 
+private[hive] object HiveTableUtil {
+
+  // copied from PlanUtils.configureJobPropertiesForStorageHandler(tableDesc)
+  // that calls Hive.get() which tries to access metastore, but it's not valid in runtime
+  // it would be fixed in next version of hive but till then, we should use this instead
+  def configureJobPropertiesForStorageHandler(
+      tableDesc: TableDesc, jobConf: JobConf, input: Boolean) {
+    val property = tableDesc.getProperties.getProperty(META_TABLE_STORAGE)
+    val storageHandler = HiveUtils.getStorageHandler(jobConf, property)
+    if (storageHandler != null) {
+      val jobProperties = new util.LinkedHashMap[String, String]
+      if (input) {
+        storageHandler.configureInputJobProperties(tableDesc, jobProperties)
+      } else {
+        storageHandler.configureOutputJobProperties(tableDesc, jobProperties)
+      }
+      if (!jobProperties.isEmpty) {
+        tableDesc.setJobProperties(jobProperties)
+      }
+    }
+  }
+}
+
 private[hive] object HadoopTableReader extends HiveInspectors with Logging {
   /**
    * Curried. After given an argument for 'path', the resulting JobConf => Unit closure is used to
@@ -295,7 +320,7 @@ private[hive] object HadoopTableReader extends HiveInspectors with Logging {
   def initializeLocalJobConfFunc(path: String, tableDesc: TableDesc)(jobConf: JobConf) {
     FileInputFormat.setInputPaths(jobConf, Seq[Path](new Path(path)): _*)
     if (tableDesc != null) {
-      PlanUtils.configureInputJobPropertiesForStorageHandler(tableDesc)
+      HiveTableUtil.configureJobPropertiesForStorageHandler(tableDesc, jobConf, true)
       Utilities.copyTableJobPropertiesToConf(tableDesc, jobConf)
     }
     val bufferSize = System.getProperty("spark.buffer.size", "65536")
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala
index c8d6b718045a..93c016b6c6c7 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveWriterContainers.scala
@@ -26,7 +26,7 @@ import org.apache.hadoop.fs.Path
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
 import org.apache.hadoop.hive.ql.exec.{FileSinkOperator, Utilities}
 import org.apache.hadoop.hive.ql.io.{HiveFileFormatUtils, HiveOutputFormat}
-import org.apache.hadoop.hive.ql.plan.{PlanUtils, TableDesc}
+import org.apache.hadoop.hive.ql.plan.TableDesc
 import org.apache.hadoop.io.Writable
 import org.apache.hadoop.mapred._
 import org.apache.hadoop.hive.common.FileUtils
@@ -55,7 +55,7 @@ private[hive] class SparkHiveWriterContainer(
   // Add table properties from storage handler to jobConf, so any custom storage
   // handler settings can be set to jobConf
   if (tableDesc != null) {
-    PlanUtils.configureOutputJobPropertiesForStorageHandler(tableDesc)
+    HiveTableUtil.configureJobPropertiesForStorageHandler(tableDesc, jobConf, false)
     Utilities.copyTableJobPropertiesToConf(tableDesc, jobConf)
   }
   protected val conf = new SerializableJobConf(jobConf)

From da936fbb74b852d5c98286ce92522dc3efd6ad6c Mon Sep 17 00:00:00 2001
From: Evan Chen <chene@us.ibm.com>
Date: Wed, 7 Oct 2015 15:04:53 -0700
Subject: [PATCH 163/896] [SPARK-10779] [PYSPARK] [MLLIB] Set initialModel for
 KMeans model in PySpark (spark.mllib)

Provide initialModel param for pyspark.mllib.clustering.KMeans

Author: Evan Chen <chene@us.ibm.com>

Closes #8967 from evanyc15/SPARK-10779-pyspark-mllib.
---
 .../spark/mllib/api/python/PythonMLLibAPI.scala |  4 +++-
 python/pyspark/mllib/clustering.py              | 17 +++++++++++++++--
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
index 69ce7f50709a..21e55938fa7a 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
@@ -336,7 +336,8 @@ private[python] class PythonMLLibAPI extends Serializable {
       initializationMode: String,
       seed: java.lang.Long,
       initializationSteps: Int,
-      epsilon: Double): KMeansModel = {
+      epsilon: Double,
+      initialModel: java.util.ArrayList[Vector]): KMeansModel = {
     val kMeansAlg = new KMeans()
       .setK(k)
       .setMaxIterations(maxIterations)
@@ -346,6 +347,7 @@ private[python] class PythonMLLibAPI extends Serializable {
       .setEpsilon(epsilon)
 
     if (seed != null) kMeansAlg.setSeed(seed)
+    if (!initialModel.isEmpty()) kMeansAlg.setInitialModel(new KMeansModel(initialModel))
 
     try {
       kMeansAlg.run(data.rdd.persist(StorageLevel.MEMORY_AND_DISK))
diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index 900ade248c38..6964a45db249 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -90,6 +90,12 @@ class KMeansModel(Saveable, Loader):
     ...     rmtree(path)
     ... except OSError:
     ...     pass
+
+    >>> data = array([-383.1,-382.9, 28.7,31.2, 366.2,367.3]).reshape(3, 2)
+    >>> model = KMeans.train(sc.parallelize(data), 3, maxIterations=0,
+    ...     initialModel = KMeansModel([(-1000.0,-1000.0),(5.0,5.0),(1000.0,1000.0)]))
+    >>> model.clusterCenters
+    [array([-1000., -1000.]), array([ 5.,  5.]), array([ 1000.,  1000.])]
     """
 
     def __init__(self, centers):
@@ -144,10 +150,17 @@ class KMeans(object):
 
     @classmethod
     def train(cls, rdd, k, maxIterations=100, runs=1, initializationMode="k-means||",
-              seed=None, initializationSteps=5, epsilon=1e-4):
+              seed=None, initializationSteps=5, epsilon=1e-4, initialModel=None):
         """Train a k-means clustering model."""
+        clusterInitialModel = []
+        if initialModel is not None:
+            if not isinstance(initialModel, KMeansModel):
+                raise Exception("initialModel is of "+str(type(initialModel))+". It needs "
+                                "to be of <type 'KMeansModel'>")
+            clusterInitialModel = [_convert_to_vector(c) for c in initialModel.clusterCenters]
         model = callMLlibFunc("trainKMeansModel", rdd.map(_convert_to_vector), k, maxIterations,
-                              runs, initializationMode, seed, initializationSteps, epsilon)
+                              runs, initializationMode, seed, initializationSteps, epsilon,
+                              clusterInitialModel)
         centers = callJavaFunc(rdd.context, model.clusterCenters)
         return KMeansModel([c.toArray() for c in centers])
 

From 6dbfd7ecf41297213f4ce8024d00c40808c5ac8f Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 7 Oct 2015 15:38:46 -0700
Subject: [PATCH 164/896] [SPARK-10982] [SQL] Rename ExpressionAggregate ->
 DeclarativeAggregate.

DeclarativeAggregate matches more closely with ImperativeAggregate we already have.

Author: Reynold Xin <rxin@databricks.com>

Closes #9013 from rxin/SPARK-10982.
---
 .../expressions/aggregate/functions.scala        | 16 ++++++++--------
 .../expressions/aggregate/interfaces.scala       |  4 ++--
 .../aggregate/AggregationIterator.scala          | 16 ++++++++--------
 .../aggregate/TungstenAggregationIterator.scala  | 12 ++++++------
 .../spark/sql/execution/aggregate/utils.scala    |  8 ++++----
 5 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 4ad2607a85ef..8aad0b7dee05 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -26,7 +26,7 @@ import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
 
-case class Average(child: Expression) extends ExpressionAggregate {
+case class Average(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -88,7 +88,7 @@ case class Average(child: Expression) extends ExpressionAggregate {
   }
 }
 
-case class Count(child: Expression) extends ExpressionAggregate {
+case class Count(child: Expression) extends DeclarativeAggregate {
   override def children: Seq[Expression] = child :: Nil
 
   override def nullable: Boolean = false
@@ -118,7 +118,7 @@ case class Count(child: Expression) extends ExpressionAggregate {
   override val evaluateExpression = Cast(currentCount, LongType)
 }
 
-case class First(child: Expression) extends ExpressionAggregate {
+case class First(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -152,7 +152,7 @@ case class First(child: Expression) extends ExpressionAggregate {
   override val evaluateExpression = first
 }
 
-case class Last(child: Expression) extends ExpressionAggregate {
+case class Last(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -186,7 +186,7 @@ case class Last(child: Expression) extends ExpressionAggregate {
   override val evaluateExpression = last
 }
 
-case class Max(child: Expression) extends ExpressionAggregate {
+case class Max(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -220,7 +220,7 @@ case class Max(child: Expression) extends ExpressionAggregate {
   override val evaluateExpression = max
 }
 
-case class Min(child: Expression) extends ExpressionAggregate {
+case class Min(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -277,7 +277,7 @@ case class StddevSamp(child: Expression) extends StddevAgg(child) {
 
 // Compute standard deviation based on online algorithm specified here:
 // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-abstract class StddevAgg(child: Expression) extends ExpressionAggregate {
+abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -397,7 +397,7 @@ abstract class StddevAgg(child: Expression) extends ExpressionAggregate {
   }
 }
 
-case class Sum(child: Expression) extends ExpressionAggregate {
+case class Sum(child: Expression) extends DeclarativeAggregate {
 
   override def children: Seq[Expression] = child :: Nil
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index 74e15ec90b7f..9ba3a9c98045 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -97,7 +97,7 @@ private[sql] case class AggregateExpression2(
  *
  *  - [[ImperativeAggregate]] is for aggregation functions that are specified in terms of
  *    initialize(), update(), and merge() functions that operate on Row-based aggregation buffers.
- *  - [[ExpressionAggregate]] is for aggregation functions that are specified using
+ *  - [[DeclarativeAggregate]] is for aggregation functions that are specified using
  *    Catalyst expressions.
  *
  * In both interfaces, aggregates must define the schema ([[aggBufferSchema]]) and attributes
@@ -244,7 +244,7 @@ abstract class ImperativeAggregate extends AggregateFunction2 {
  * can then use these attributes when defining `updateExpressions`, `mergeExpressions`, and
  * `evaluateExpressions`.
  */
-abstract class ExpressionAggregate
+abstract class DeclarativeAggregate
   extends AggregateFunction2
   with Serializable
   with Unevaluable {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index 04903022e546..5f7341e88c7c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -127,7 +127,7 @@ abstract class AggregationIterator(
     var i = 0
     while (i < allAggregateFunctions.length) {
       allAggregateFunctions(i) match {
-        case agg: ExpressionAggregate =>
+        case agg: DeclarativeAggregate =>
         case _ => positions += i
       }
       i += 1
@@ -146,7 +146,7 @@ abstract class AggregationIterator(
   // The projection used to initialize buffer values for all expression-based aggregates.
   private[this] val expressionAggInitialProjection = {
     val initExpressions = allAggregateFunctions.flatMap {
-      case ae: ExpressionAggregate => ae.initialValues
+      case ae: DeclarativeAggregate => ae.initialValues
       // For the positions corresponding to imperative aggregate functions, we'll use special
       // no-op expressions which are ignored during projection code-generation.
       case i: ImperativeAggregate => Seq.fill(i.aggBufferAttributes.length)(NoOp)
@@ -172,7 +172,7 @@ abstract class AggregationIterator(
       // Partial-only
       case (Some(Partial), None) =>
         val updateExpressions = nonCompleteAggregateFunctions.flatMap {
-          case ae: ExpressionAggregate => ae.updateExpressions
+          case ae: DeclarativeAggregate => ae.updateExpressions
           case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val expressionAggUpdateProjection =
@@ -204,7 +204,7 @@ abstract class AggregationIterator(
         //  groupingKeyAttributes ++
         //    allAggregateFunctions.flatMap(_.cloneBufferAttributes)
         val mergeExpressions = nonCompleteAggregateFunctions.flatMap {
-          case ae: ExpressionAggregate => ae.mergeExpressions
+          case ae: DeclarativeAggregate => ae.mergeExpressions
           case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         // This projection is used to merge buffer values for all expression-based aggregates.
@@ -248,7 +248,7 @@ abstract class AggregationIterator(
             nonCompleteAggregateFunctions.flatMap(_.inputAggBufferAttributes)
         val mergeExpressions =
           nonCompleteAggregateFunctions.flatMap {
-            case ae: ExpressionAggregate => ae.mergeExpressions
+            case ae: DeclarativeAggregate => ae.mergeExpressions
             case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           } ++ completeOffsetExpressions
         val finalExpressionAggMergeProjection =
@@ -256,7 +256,7 @@ abstract class AggregationIterator(
 
         val updateExpressions =
           finalOffsetExpressions ++ completeAggregateFunctions.flatMap {
-            case ae: ExpressionAggregate => ae.updateExpressions
+            case ae: DeclarativeAggregate => ae.updateExpressions
             case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
         val completeExpressionAggUpdateProjection =
@@ -291,7 +291,7 @@ abstract class AggregationIterator(
 
         val updateExpressions =
           completeAggregateFunctions.flatMap {
-            case ae: ExpressionAggregate => ae.updateExpressions
+            case ae: DeclarativeAggregate => ae.updateExpressions
             case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
         val completeExpressionAggUpdateProjection =
@@ -353,7 +353,7 @@ abstract class AggregationIterator(
         val bufferSchemata =
           allAggregateFunctions.flatMap(_.aggBufferAttributes)
         val evalExpressions = allAggregateFunctions.map {
-          case ae: ExpressionAggregate => ae.evaluateExpression
+          case ae: DeclarativeAggregate => ae.evaluateExpression
           case agg: AggregateFunction2 => NoOp
         }
         val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferSchemata)()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index 6a84c0af0b46..a6f4c1d92f6d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -131,15 +131,15 @@ class TungstenAggregationIterator(
   // All aggregate functions. TungstenAggregationIterator only handles expression-based aggregate.
   // If there is any functions that is an ImperativeAggregateFunction, we throw an
   // IllegalStateException.
-  private[this] val allAggregateFunctions: Array[ExpressionAggregate] = {
+  private[this] val allAggregateFunctions: Array[DeclarativeAggregate] = {
     if (!allAggregateExpressions.forall(
-        _.aggregateFunction.isInstanceOf[ExpressionAggregate])) {
+        _.aggregateFunction.isInstanceOf[DeclarativeAggregate])) {
       throw new IllegalStateException(
         "Only ExpressionAggregateFunctions should be passed in TungstenAggregationIterator.")
     }
 
     allAggregateExpressions
-      .map(_.aggregateFunction.asInstanceOf[ExpressionAggregate])
+      .map(_.aggregateFunction.asInstanceOf[DeclarativeAggregate])
       .toArray
   }
 
@@ -203,9 +203,9 @@ class TungstenAggregationIterator(
 
       // Final-Complete
       case (Some(Final), Some(Complete)) =>
-        val nonCompleteAggregateFunctions: Array[ExpressionAggregate] =
+        val nonCompleteAggregateFunctions: Array[DeclarativeAggregate] =
           allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
-        val completeAggregateFunctions: Array[ExpressionAggregate] =
+        val completeAggregateFunctions: Array[DeclarativeAggregate] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
 
         val completeOffsetExpressions =
@@ -235,7 +235,7 @@ class TungstenAggregationIterator(
 
       // Complete-only
       case (None, Some(Complete)) =>
-        val completeAggregateFunctions: Array[ExpressionAggregate] =
+        val completeAggregateFunctions: Array[DeclarativeAggregate] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
 
         val updateExpressions =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index e1d7e1bf02fc..e1c2d9475a10 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -97,7 +97,7 @@ object Utils {
     // Check if we can use TungstenAggregate.
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
-      aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[ExpressionAggregate]) &&
+      aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[DeclarativeAggregate]) &&
       supportsTungstenAggregate(
         groupingExpressions,
         aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
@@ -157,7 +157,7 @@ object Utils {
             // aggregateFunctionMap contains unique aggregate functions.
             val aggregateFunction =
               aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._1
-            aggregateFunction.asInstanceOf[ExpressionAggregate].evaluateExpression
+            aggregateFunction.asInstanceOf[DeclarativeAggregate].evaluateExpression
           case expression =>
             // We do not rely on the equality check at here since attributes may
             // different cosmetically. Instead, we use semanticEquals.
@@ -215,7 +215,7 @@ object Utils {
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
         aggregateExpressions.forall(
-          _.aggregateFunction.isInstanceOf[ExpressionAggregate]) &&
+          _.aggregateFunction.isInstanceOf[DeclarativeAggregate]) &&
         supportsTungstenAggregate(
           groupingExpressions,
           aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
@@ -359,7 +359,7 @@ object Utils {
                 // aggregate functions that have not been rewritten.
                 aggregateFunctionMap(function, isDistinct)._1
               }
-            aggregateFunction.asInstanceOf[ExpressionAggregate].evaluateExpression
+            aggregateFunction.asInstanceOf[DeclarativeAggregate].evaluateExpression
           case expression =>
             // We do not rely on the equality check at here since attributes may
             // different cosmetically. Instead, we use semanticEquals.

From 7bf07faa716bd6a01252c5e888d0956096bde026 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 7 Oct 2015 15:50:45 -0700
Subject: [PATCH 165/896] [SPARK-10490] [ML] Consolidate the Cholesky solvers
 in WeightedLeastSquares and ALS

Consolidate the Cholesky solvers in WeightedLeastSquares and ALS.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8936 from yanboliang/spark-10490.
---
 .../spark/ml/optim/WeightedLeastSquares.scala | 23 +---------
 .../apache/spark/ml/recommendation/ALS.scala  | 10 +----
 .../mllib/linalg/CholeskyDecomposition.scala  | 43 +++++++++++++++++++
 .../linalg/EigenValueDecomposition.scala      |  6 +--
 4 files changed, 47 insertions(+), 35 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
index 4374e9963156..d7eaa5a9268f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
@@ -17,12 +17,8 @@
 
 package org.apache.spark.ml.optim
 
-import com.github.fommil.netlib.LAPACK.{getInstance => lapack}
-import org.netlib.util.intW
-
 import org.apache.spark.Logging
 import org.apache.spark.mllib.linalg._
-import org.apache.spark.mllib.linalg.distributed.RowMatrix
 import org.apache.spark.rdd.RDD
 
 /**
@@ -110,7 +106,7 @@ private[ml] class WeightedLeastSquares(
       j += 1
     }
 
-    val x = choleskySolve(aaBar.values, abBar)
+    val x = new DenseVector(CholeskyDecomposition.solve(aaBar.values, abBar.values))
 
     // compute intercept
     val intercept = if (fitIntercept) {
@@ -121,23 +117,6 @@ private[ml] class WeightedLeastSquares(
 
     new WeightedLeastSquaresModel(x, intercept)
   }
-
-  /**
-   * Solves a symmetric positive definite linear system via Cholesky factorization.
-   * The input arguments are modified in-place to store the factorization and the solution.
-   * @param A the upper triangular part of A
-   * @param bx right-hand side
-   * @return the solution vector
-   */
-  // TODO: SPARK-10490 - consolidate this and the Cholesky solver in ALS
-  private def choleskySolve(A: Array[Double], bx: DenseVector): DenseVector = {
-    val k = bx.size
-    val info = new intW(0)
-    lapack.dppsv("U", k, 1, A, bx.values, k, info)
-    val code = info.`val`
-    assert(code == 0, s"lapack.dpotrs returned $code.")
-    bx
-  }
 }
 
 private[ml] object WeightedLeastSquares {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index f6f5281f71a5..535f266b9a94 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -26,9 +26,7 @@ import scala.util.Sorting
 import scala.util.hashing.byteswap64
 
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
-import com.github.fommil.netlib.LAPACK.{getInstance => lapack}
 import org.apache.hadoop.fs.{FileSystem, Path}
-import org.netlib.util.intW
 
 import org.apache.spark.{Logging, Partitioner}
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
@@ -36,6 +34,7 @@ import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.mllib.linalg.CholeskyDecomposition
 import org.apache.spark.mllib.optimization.NNLS
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.DataFrame
@@ -366,8 +365,6 @@ object ALS extends Logging {
   /** Cholesky solver for least square problems. */
   private[recommendation] class CholeskySolver extends LeastSquaresNESolver {
 
-    private val upper = "U"
-
     /**
      * Solves a least squares problem with L2 regularization:
      *
@@ -387,10 +384,7 @@ object ALS extends Logging {
         i += j
         j += 1
       }
-      val info = new intW(0)
-      lapack.dppsv(upper, k, 1, ne.ata, ne.atb, k, info)
-      val code = info.`val`
-      assert(code == 0, s"lapack.dppsv returned $code.")
+      CholeskyDecomposition.solve(ne.ata, ne.atb)
       val x = new Array[Float](k)
       i = 0
       while (i < k) {
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala
new file mode 100644
index 000000000000..66eb40b6f4a6
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.linalg
+
+import com.github.fommil.netlib.LAPACK.{getInstance => lapack}
+import org.netlib.util.intW
+
+/**
+ * Compute Cholesky decomposition.
+ */
+private[spark] object CholeskyDecomposition {
+
+  /**
+   * Solves a symmetric positive definite linear system via Cholesky factorization.
+   * The input arguments are modified in-place to store the factorization and the solution.
+   * @param A the upper triangular part of A
+   * @param bx right-hand side
+   * @return the solution array
+   */
+  def solve(A: Array[Double], bx: Array[Double]): Array[Double] = {
+    val k = bx.size
+    val info = new intW(0)
+    lapack.dppsv("U", k, 1, A, bx, k, info)
+    val code = info.`val`
+    assert(code == 0, s"lapack.dpotrs returned $code.")
+    bx
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
index ae3ba3099c87..863abe86d38d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/EigenValueDecomposition.scala
@@ -21,13 +21,9 @@ import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV}
 import com.github.fommil.netlib.ARPACK
 import org.netlib.util.{intW, doubleW}
 
-import org.apache.spark.annotation.Experimental
-
 /**
- * :: Experimental ::
  * Compute eigen-decomposition.
  */
-@Experimental
 private[mllib] object EigenValueDecomposition {
   /**
    * Compute the leading k eigenvalues and eigenvectors on a symmetric square matrix using ARPACK.
@@ -46,7 +42,7 @@ private[mllib] object EigenValueDecomposition {
    *       for more details). The maximum number of Arnoldi update iterations is set to 300 in this
    *       function.
    */
-  private[mllib] def symmetricEigs(
+  def symmetricEigs(
       mul: BDV[Double] => BDV[Double],
       n: Int,
       k: Int,

From 37526aca2430e36a931fbe6e01a152e701a1b94e Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 7 Oct 2015 15:51:09 -0700
Subject: [PATCH 166/896] [SPARK-10980] [SQL] fix bug in create Decimal

The created decimal is wrong if using `Decimal(unscaled, precision, scale)` with unscaled > 1e18 and and precision > 18 and scale > 0.

This bug exists since the beginning.

Author: Davies Liu <davies@databricks.com>

Closes #9014 from davies/fix_decimal.
---
 .../src/main/scala/org/apache/spark/sql/types/Decimal.scala     | 2 +-
 .../scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
index bfcf111385b7..909b8e31f245 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
@@ -88,7 +88,7 @@ final class Decimal extends Ordered[Decimal] with Serializable {
       if (precision < 19) {
         return null  // Requested precision is too low to represent this value
       }
-      this.decimalVal = BigDecimal(unscaled)
+      this.decimalVal = BigDecimal(unscaled, scale)
       this.longVal = 0L
     } else {
       val p = POW_10(math.min(precision, MAX_LONG_DIGITS))
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
index 6921d15958a5..f9aceb8d3b13 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
@@ -44,6 +44,7 @@ class DecimalSuite extends SparkFunSuite with PrivateMethodTester {
     checkDecimal(Decimal(170L, 4, 2), "1.70", 4, 2)
     checkDecimal(Decimal(17L, 24, 1), "1.7", 24, 1)
     checkDecimal(Decimal(1e17.toLong, 18, 0), 1e17.toLong.toString, 18, 0)
+    checkDecimal(Decimal(1000000000000000000L, 20, 2), "10000000000000000.00", 20, 2)
     checkDecimal(Decimal(Long.MaxValue), Long.MaxValue.toString, 20, 0)
     checkDecimal(Decimal(Long.MinValue), Long.MinValue.toString, 20, 0)
     intercept[IllegalArgumentException](Decimal(170L, 2, 1))

From 7e2e268289828ae664622c59b90d82938d957ff3 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 7 Oct 2015 15:53:37 -0700
Subject: [PATCH 167/896] [SPARK-9702] [SQL] Use Exchange to implement logical
 Repartition operator

This patch allows `Repartition` to support UnsafeRows. This is accomplished by implementing the logical `Repartition` operator in terms of `Exchange` and a new `RoundRobinPartitioning`.

Author: Josh Rosen <joshrosen@databricks.com>
Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8083 from JoshRosen/SPARK-9702.
---
 .../catalyst/plans/physical/partitioning.scala | 16 ++++++++++++++++
 .../apache/spark/sql/execution/Exchange.scala  | 16 +++++++++++++---
 .../spark/sql/execution/SparkStrategies.scala  |  6 +++++-
 .../spark/sql/execution/basicOperators.scala   | 18 +++++++++---------
 4 files changed, 43 insertions(+), 13 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
index 5ac3f1f5b0ca..86b9417477ba 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
@@ -194,6 +194,22 @@ case class UnknownPartitioning(numPartitions: Int) extends Partitioning {
   override def guarantees(other: Partitioning): Boolean = false
 }
 
+/**
+ * Represents a partitioning where rows are distributed evenly across output partitions
+ * by starting from a random target partition number and distributing rows in a round-robin
+ * fashion. This partitioning is used when implementing the DataFrame.repartition() operator.
+ */
+case class RoundRobinPartitioning(numPartitions: Int) extends Partitioning {
+  override def satisfies(required: Distribution): Boolean = required match {
+    case UnspecifiedDistribution => true
+    case _ => false
+  }
+
+  override def compatibleWith(other: Partitioning): Boolean = false
+
+  override def guarantees(other: Partitioning): Boolean = false
+}
+
 case object SinglePartition extends Partitioning {
   val numPartitions = 1
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 029f2264a6a2..8efa471600b1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.execution
 
+import java.util.Random
+
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.serializer.Serializer
@@ -31,7 +33,7 @@ import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjectio
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.util.MutablePair
-import org.apache.spark.{HashPartitioner, Partitioner, RangePartitioner, SparkEnv}
+import org.apache.spark._
 
 /**
  * :: DeveloperApi ::
@@ -130,7 +132,6 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
   @transient private lazy val sparkConf = child.sqlContext.sparkContext.getConf
 
   private val serializer: Serializer = {
-    val rowDataTypes = child.output.map(_.dataType).toArray
     if (tungstenMode) {
       new UnsafeRowSerializer(child.output.size)
     } else {
@@ -141,6 +142,7 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
   protected override def doExecute(): RDD[InternalRow] = attachTree(this , "execute") {
     val rdd = child.execute()
     val part: Partitioner = newPartitioning match {
+      case RoundRobinPartitioning(numPartitions) => new HashPartitioner(numPartitions)
       case HashPartitioning(expressions, numPartitions) => new HashPartitioner(numPartitions)
       case RangePartitioning(sortingExpressions, numPartitions) =>
         // Internally, RangePartitioner runs a job on the RDD that samples keys to compute
@@ -162,7 +164,15 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
       case _ => sys.error(s"Exchange not implemented for $newPartitioning")
       // TODO: Handle BroadcastPartitioning.
     }
-    def getPartitionKeyExtractor(): InternalRow => InternalRow = newPartitioning match {
+    def getPartitionKeyExtractor(): InternalRow => Any = newPartitioning match {
+      case RoundRobinPartitioning(numPartitions) =>
+        // Distributes elements evenly across output partitions, starting from a random partition.
+        var position = new Random(TaskContext.get().partitionId()).nextInt(numPartitions)
+        (row: InternalRow) => {
+          // The HashPartitioner will handle the `mod` by the number of partitions
+          position += 1
+          position
+        }
       case HashPartitioning(expressions, _) => newMutableProjection(expressions, child.output)()
       case RangePartitioning(_, _) | SinglePartition => identity
       case _ => sys.error(s"Exchange not implemented for $newPartitioning")
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index b078c8b6b05c..d1bbf2e20fcf 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -336,7 +336,11 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         throw new IllegalStateException(
           "logical distinct operator should have been replaced by aggregate in the optimizer")
       case logical.Repartition(numPartitions, shuffle, child) =>
-        execution.Repartition(numPartitions, shuffle, planLater(child)) :: Nil
+        if (shuffle) {
+          execution.Exchange(RoundRobinPartitioning(numPartitions), planLater(child)) :: Nil
+        } else {
+          execution.Coalesce(numPartitions, planLater(child)) :: Nil
+        }
       case logical.SortPartitions(sortExprs, child) =>
         // This sort only sorts tuples within a partition. Its requiredDistribution will be
         // an UnspecifiedDistribution.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 3e49e0a35741..d4bbbeb39efe 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -17,21 +17,20 @@
 
 package org.apache.spark.sql.execution
 
+import java.util.Random
+
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD, ShuffledRDD}
+import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.sort.SortShuffleManager
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.sql.types.StructType
-import org.apache.spark.util.collection.ExternalSorter
-import org.apache.spark.util.collection.unsafe.sort.PrefixComparator
 import org.apache.spark.util.random.PoissonSampler
-import org.apache.spark.util.{CompletionIterator, MutablePair}
+import org.apache.spark.util.MutablePair
 import org.apache.spark.{HashPartitioner, SparkEnv}
 
 /**
@@ -279,10 +278,12 @@ case class TakeOrderedAndProject(
 /**
  * :: DeveloperApi ::
  * Return a new RDD that has exactly `numPartitions` partitions.
+ * Similar to coalesce defined on an [[RDD]], this operation results in a narrow dependency, e.g.
+ * if you go from 1000 partitions to 100 partitions, there will not be a shuffle, instead each of
+ * the 100 new partitions will claim 10 of the current partitions.
  */
 @DeveloperApi
-case class Repartition(numPartitions: Int, shuffle: Boolean, child: SparkPlan)
-  extends UnaryNode {
+case class Coalesce(numPartitions: Int, child: SparkPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output
 
   override def outputPartitioning: Partitioning = {
@@ -291,11 +292,10 @@ case class Repartition(numPartitions: Int, shuffle: Boolean, child: SparkPlan)
   }
 
   protected override def doExecute(): RDD[InternalRow] = {
-    child.execute().map(_.copy()).coalesce(numPartitions, shuffle)
+    child.execute().map(_.copy()).coalesce(numPartitions, shuffle = false)
   }
 }
 
-
 /**
  * :: DeveloperApi ::
  * Returns a table with the elements from left that are not in right using

From dd36ec6bc5844aaa045a4bd9ba49113528e1740c Mon Sep 17 00:00:00 2001
From: DB Tsai <dbt@netflix.com>
Date: Wed, 7 Oct 2015 15:56:57 -0700
Subject: [PATCH 168/896] [SPARK-10738] [ML] Refactoring `Instance` out from
 LOR and LIR, and also cleaning up some code

Refactoring `Instance` case class out from LOR and LIR, and also cleaning up some code.

Author: DB Tsai <dbt@netflix.com>

Closes #8853 from dbtsai/refactoring.
---
 .../classification/LogisticRegression.scala   | 116 ++++++++----------
 .../apache/spark/ml/feature/Instance.scala    |  29 +++++
 .../ml/regression/LinearRegression.scala      |  82 ++++++-------
 .../LogisticRegressionSuite.scala             |   1 +
 .../ml/regression/LinearRegressionSuite.scala |   1 +
 5 files changed, 125 insertions(+), 104 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/feature/Instance.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index c17a7b0c361e..6f839ff4d7cd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -24,6 +24,7 @@ import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS,
 
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util.Identifiable
@@ -146,17 +147,6 @@ private[classification] trait LogisticRegressionParams extends ProbabilisticClas
   }
 }
 
-/**
- * Class that represents an instance of weighted data point with label and features.
- *
- * TODO: Refactor this class to proper place.
- *
- * @param label Label for this data point.
- * @param weight The weight of this instance.
- * @param features The vector of features for this data point.
- */
-private[classification] case class Instance(label: Double, weight: Double, features: Vector)
-
 /**
  * :: Experimental ::
  * Logistic regression.
@@ -322,7 +312,7 @@ class LogisticRegression(override val uid: String)
 
     if ($(fitIntercept)) {
       /*
-         For binary logistic regression, when we initialize the weights as zeros,
+         For binary logistic regression, when we initialize the coefficients as zeros,
          it will converge faster if we initialize the intercept such that
          it follows the distribution of the labels.
 
@@ -757,62 +747,63 @@ private class LogisticAggregator(
   private val gradientSumArray = Array.ofDim[Double](coefficientsArray.length)
 
   /**
-   * Add a new training data to this LogisticAggregator, and update the loss and gradient
+   * Add a new training instance to this LogisticAggregator, and update the loss and gradient
    * of the objective function.
    *
-   * @param label The label for this data point.
-   * @param data The features for one data point in dense/sparse vector format to be added
-   *             into this aggregator.
-   * @param weight The weight for over-/undersamples each of training instance. Default is one.
+   * @param instance The instance of data point to be added.
    * @return This LogisticAggregator object.
    */
-  def add(label: Double, data: Vector, weight: Double = 1.0): this.type = {
-    require(dim == data.size, s"Dimensions mismatch when adding new instance." +
-      s" Expecting $dim but got ${data.size}.")
-    require(weight >= 0.0, s"instance weight, ${weight} has to be >= 0.0")
-
-    if (weight == 0.0) return this
+  def add(instance: Instance): this.type = {
+    instance match { case Instance(label, weight, features) =>
+      require(dim == features.size, s"Dimensions mismatch when adding new instance." +
+        s" Expecting $dim but got ${features.size}.")
+      require(weight >= 0.0, s"instance weight, ${weight} has to be >= 0.0")
+
+      if (weight == 0.0) return this
+
+      val localCoefficientsArray = coefficientsArray
+      val localGradientSumArray = gradientSumArray
+
+      numClasses match {
+        case 2 =>
+          // For Binary Logistic Regression.
+          val margin = - {
+            var sum = 0.0
+            features.foreachActive { (index, value) =>
+              if (featuresStd(index) != 0.0 && value != 0.0) {
+                sum += localCoefficientsArray(index) * (value / featuresStd(index))
+              }
+            }
+            sum + {
+              if (fitIntercept) localCoefficientsArray(dim) else 0.0
+            }
+          }
 
-    val localCoefficientsArray = coefficientsArray
-    val localGradientSumArray = gradientSumArray
+          val multiplier = weight * (1.0 / (1.0 + math.exp(margin)) - label)
 
-    numClasses match {
-      case 2 =>
-        // For Binary Logistic Regression.
-        val margin = - {
-          var sum = 0.0
-          data.foreachActive { (index, value) =>
+          features.foreachActive { (index, value) =>
             if (featuresStd(index) != 0.0 && value != 0.0) {
-              sum += localCoefficientsArray(index) * (value / featuresStd(index))
+              localGradientSumArray(index) += multiplier * (value / featuresStd(index))
             }
           }
-          sum + { if (fitIntercept) localCoefficientsArray(dim) else 0.0 }
-        }
-
-        val multiplier = weight * (1.0 / (1.0 + math.exp(margin)) - label)
 
-        data.foreachActive { (index, value) =>
-          if (featuresStd(index) != 0.0 && value != 0.0) {
-            localGradientSumArray(index) += multiplier * (value / featuresStd(index))
+          if (fitIntercept) {
+            localGradientSumArray(dim) += multiplier
           }
-        }
 
-        if (fitIntercept) {
-          localGradientSumArray(dim) += multiplier
-        }
-
-        if (label > 0) {
-          // The following is equivalent to log(1 + exp(margin)) but more numerically stable.
-          lossSum += weight * MLUtils.log1pExp(margin)
-        } else {
-          lossSum += weight * (MLUtils.log1pExp(margin) - margin)
-        }
-      case _ =>
-        new NotImplementedError("LogisticRegression with ElasticNet in ML package only supports " +
-          "binary classification for now.")
+          if (label > 0) {
+            // The following is equivalent to log(1 + exp(margin)) but more numerically stable.
+            lossSum += weight * MLUtils.log1pExp(margin)
+          } else {
+            lossSum += weight * (MLUtils.log1pExp(margin) - margin)
+          }
+        case _ =>
+          new NotImplementedError("LogisticRegression with ElasticNet in ML package " +
+            "only supports binary classification for now.")
+      }
+      weightSum += weight
+      this
     }
-    weightSum += weight
-    this
   }
 
   /**
@@ -861,11 +852,11 @@ private class LogisticAggregator(
 /**
  * LogisticCostFun implements Breeze's DiffFunction[T] for a multinomial logistic loss function,
  * as used in multi-class classification (it is also used in binary logistic regression).
- * It returns the loss and gradient with L2 regularization at a particular point (weights).
+ * It returns the loss and gradient with L2 regularization at a particular point (coefficients).
  * It's used in Breeze's convex optimization routines.
  */
 private class LogisticCostFun(
-    data: RDD[Instance],
+    instances: RDD[Instance],
     numClasses: Int,
     fitIntercept: Boolean,
     standardization: Boolean,
@@ -875,15 +866,14 @@ private class LogisticCostFun(
 
   override def calculate(coefficients: BDV[Double]): (Double, BDV[Double]) = {
     val numFeatures = featuresStd.length
-    val w = Vectors.fromBreeze(coefficients)
+    val coeffs = Vectors.fromBreeze(coefficients)
 
     val logisticAggregator = {
-      val seqOp = (c: LogisticAggregator, instance: Instance) =>
-        c.add(instance.label, instance.features, instance.weight)
+      val seqOp = (c: LogisticAggregator, instance: Instance) => c.add(instance)
       val combOp = (c1: LogisticAggregator, c2: LogisticAggregator) => c1.merge(c2)
 
-      data.treeAggregate(
-        new LogisticAggregator(w, numClasses, fitIntercept, featuresStd, featuresMean)
+      instances.treeAggregate(
+        new LogisticAggregator(coeffs, numClasses, fitIntercept, featuresStd, featuresMean)
       )(seqOp, combOp)
     }
 
@@ -894,7 +884,7 @@ private class LogisticCostFun(
       0.0
     } else {
       var sum = 0.0
-      w.foreachActive { (index, value) =>
+      coeffs.foreachActive { (index, value) =>
         // If `fitIntercept` is true, the last term which is intercept doesn't
         // contribute to the regularization.
         if (index != numFeatures) {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Instance.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Instance.scala
new file mode 100644
index 000000000000..12176757aee3
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Instance.scala
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+import org.apache.spark.mllib.linalg.Vector
+
+/**
+ * Class that represents an instance of weighted data point with label and features.
+ *
+ * @param label Label for this data point.
+ * @param weight The weight of this instance.
+ * @param features The vector of features for this data point.
+ */
+private[ml] case class Instance(label: Double, weight: Double, features: Vector)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index a77e702141b3..0dc084fdd12f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -19,11 +19,12 @@ package org.apache.spark.ml.regression
 
 import scala.collection.mutable
 
-import breeze.linalg.{DenseVector => BDV, norm => brzNorm}
+import breeze.linalg.{DenseVector => BDV}
 import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS, OWLQN => BreezeOWLQN}
 
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.param.shared._
@@ -44,24 +45,13 @@ private[regression] trait LinearRegressionParams extends PredictorParams
     with HasRegParam with HasElasticNetParam with HasMaxIter with HasTol
     with HasFitIntercept with HasStandardization with HasWeightCol
 
-/**
- * Class that represents an instance of weighted data point with label and features.
- *
- * TODO: Refactor this class to proper place.
- *
- * @param label Label for this data point.
- * @param weight The weight of this instance.
- * @param features The vector of features for this data point.
- */
-private[regression] case class Instance(label: Double, weight: Double, features: Vector)
-
 /**
  * :: Experimental ::
  * Linear regression.
  *
  * The learning objective is to minimize the squared error, with regularization.
  * The specific squared error loss function used is:
- *   L = 1/2n ||A weights - y||^2^
+ *   L = 1/2n ||A coefficients - y||^2^
  *
  * This support multiple types of regularization:
  *  - none (a.k.a. ordinary least squares)
@@ -172,13 +162,14 @@ class LinearRegression(override val uid: String)
     // If the yStd is zero, then the intercept is yMean with zero weights;
     // as a result, training is not needed.
     if (yStd == 0.0) {
-      logWarning(s"The standard deviation of the label is zero, so the weights will be zeros " +
-        s"and the intercept will be the mean of the label; as a result, training is not needed.")
+      logWarning(s"The standard deviation of the label is zero, so the coefficients will be " +
+        s"zeros and the intercept will be the mean of the label; as a result, " +
+        s"training is not needed.")
       if (handlePersistence) instances.unpersist()
-      val weights = Vectors.sparse(numFeatures, Seq())
+      val coefficients = Vectors.sparse(numFeatures, Seq())
       val intercept = yMean
 
-      val model = new LinearRegressionModel(uid, weights, intercept)
+      val model = new LinearRegressionModel(uid, coefficients, intercept)
       val trainingSummary = new LinearRegressionTrainingSummary(
         model.transform(dataset),
         $(predictionCol),
@@ -218,11 +209,11 @@ class LinearRegression(override val uid: String)
       new BreezeOWLQN[Int, BDV[Double]]($(maxIter), 10, effectiveL1RegFun, $(tol))
     }
 
-    val initialWeights = Vectors.zeros(numFeatures)
+    val initialCoefficients = Vectors.zeros(numFeatures)
     val states = optimizer.iterations(new CachedDiffFunction(costFun),
-      initialWeights.toBreeze.toDenseVector)
+      initialCoefficients.toBreeze.toDenseVector)
 
-    val (weights, objectiveHistory) = {
+    val (coefficients, objectiveHistory) = {
       /*
          Note that in Linear Regression, the objective history (loss + regularization) returned
          from optimizer is computed in the scaled space given by the following formula.
@@ -243,18 +234,18 @@ class LinearRegression(override val uid: String)
       }
 
       /*
-         The weights are trained in the scaled space; we're converting them back to
+         The coefficients are trained in the scaled space; we're converting them back to
          the original space.
        */
-      val rawWeights = state.x.toArray.clone()
+      val rawCoefficients = state.x.toArray.clone()
       var i = 0
-      val len = rawWeights.length
+      val len = rawCoefficients.length
       while (i < len) {
-        rawWeights(i) *= { if (featuresStd(i) != 0.0) yStd / featuresStd(i) else 0.0 }
+        rawCoefficients(i) *= { if (featuresStd(i) != 0.0) yStd / featuresStd(i) else 0.0 }
         i += 1
       }
 
-      (Vectors.dense(rawWeights).compressed, arrayBuilder.result())
+      (Vectors.dense(rawCoefficients).compressed, arrayBuilder.result())
     }
 
     /*
@@ -262,11 +253,15 @@ class LinearRegression(override val uid: String)
        converged. See the following discussion for detail.
        http://stats.stackexchange.com/questions/13617/how-is-the-intercept-computed-in-glmnet
      */
-    val intercept = if ($(fitIntercept)) yMean - dot(weights, Vectors.dense(featuresMean)) else 0.0
+    val intercept = if ($(fitIntercept)) {
+      yMean - dot(coefficients, Vectors.dense(featuresMean))
+    } else {
+      0.0
+    }
 
     if (handlePersistence) instances.unpersist()
 
-    val model = copyValues(new LinearRegressionModel(uid, weights, intercept))
+    val model = copyValues(new LinearRegressionModel(uid, coefficients, intercept))
     val trainingSummary = new LinearRegressionTrainingSummary(
       model.transform(dataset),
       $(predictionCol),
@@ -425,7 +420,7 @@ class LinearRegressionSummary private[regression] (
  * For improving the convergence rate during the optimization process, and also preventing against
  * features with very large variances exerting an overly large influence during model training,
  * package like R's GLMNET performs the scaling to unit variance and removing the mean to reduce
- * the condition number, and then trains the model in scaled space but returns the weights in
+ * the condition number, and then trains the model in scaled space but returns the coefficients in
  * the original scale. See page 9 in http://cran.r-project.org/web/packages/glmnet/glmnet.pdf
  *
  * However, we don't want to apply the `StandardScaler` on the training dataset, and then cache
@@ -456,7 +451,7 @@ class LinearRegressionSummary private[regression] (
  *     + \bar{y} / \hat{y}||^2
  *   = 1/2n ||\sum_i w_i^\prime x_i - y / \hat{y} + offset||^2 = 1/2n diff^2
  * }}}
- * where w_i^\prime^ is the effective weights defined by w_i/\hat{x_i}, offset is
+ * where w_i^\prime^ is the effective coefficients defined by w_i/\hat{x_i}, offset is
  * {{{
  * - \sum_i (w_i/\hat{x_i})\bar{x_i} + \bar{y} / \hat{y}.
  * }}}, and diff is
@@ -465,7 +460,7 @@ class LinearRegressionSummary private[regression] (
  * }}}
  *
  *
- * Note that the effective weights and offset don't depend on training dataset,
+ * Note that the effective coefficients and offset don't depend on training dataset,
  * so they can be precomputed.
  *
  * Now, the first derivative of the objective function in scaled space is
@@ -543,13 +538,13 @@ private class LeastSquaresAggregator(
   private val gradientSumArray = Array.ofDim[Double](dim)
 
   /**
-   * Add a new training data to this LeastSquaresAggregator, and update the loss and gradient
+   * Add a new training instance to this LeastSquaresAggregator, and update the loss and gradient
    * of the objective function.
    *
-   * @param instance  The data point instance to be added.
+   * @param instance The instance of data point to be added.
    * @return This LeastSquaresAggregator object.
    */
-  def add(instance: Instance): this.type =
+  def add(instance: Instance): this.type = {
     instance match { case Instance(label, weight, features) =>
       require(dim == features.size, s"Dimensions mismatch when adding new sample." +
         s" Expecting $dim but got ${features.size}.")
@@ -573,6 +568,7 @@ private class LeastSquaresAggregator(
       weightSum += weight
       this
     }
+  }
 
   /**
    * Merge another LeastSquaresAggregator, and update the loss and gradient
@@ -621,11 +617,11 @@ private class LeastSquaresAggregator(
 
 /**
  * LeastSquaresCostFun implements Breeze's DiffFunction[T] for Least Squares cost.
- * It returns the loss and gradient with L2 regularization at a particular point (weights).
+ * It returns the loss and gradient with L2 regularization at a particular point (coefficients).
  * It's used in Breeze's convex optimization routines.
  */
 private class LeastSquaresCostFun(
-    data: RDD[Instance],
+    instances: RDD[Instance],
     labelStd: Double,
     labelMean: Double,
     fitIntercept: Boolean,
@@ -635,12 +631,16 @@ private class LeastSquaresCostFun(
     effectiveL2regParam: Double) extends DiffFunction[BDV[Double]] {
 
   override def calculate(coefficients: BDV[Double]): (Double, BDV[Double]) = {
-    val coeff = Vectors.fromBreeze(coefficients)
+    val coeffs = Vectors.fromBreeze(coefficients)
 
-    val leastSquaresAggregator = data.treeAggregate(new LeastSquaresAggregator(coeff, labelStd,
-      labelMean, fitIntercept, featuresStd, featuresMean))(
-        seqOp = (aggregator, instance) => aggregator.add(instance),
-        combOp = (aggregator1, aggregator2) => aggregator1.merge(aggregator2))
+    val leastSquaresAggregator = {
+      val seqOp = (c: LeastSquaresAggregator, instance: Instance) => c.add(instance)
+      val combOp = (c1: LeastSquaresAggregator, c2: LeastSquaresAggregator) => c1.merge(c2)
+
+      instances.treeAggregate(
+        new LeastSquaresAggregator(coeffs, labelStd, labelMean, fitIntercept, featuresStd,
+          featuresMean))(seqOp, combOp)
+    }
 
     val totalGradientArray = leastSquaresAggregator.gradient.toArray
 
@@ -648,7 +648,7 @@ private class LeastSquaresCostFun(
       0.0
     } else {
       var sum = 0.0
-      coeff.foreachActive { (index, value) =>
+      coeffs.foreachActive { (index, value) =>
         // The following code will compute the loss of the regularization; also
         // the gradient of the regularization, and add back to totalGradientArray.
         sum += {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index ec01998601fb..5186c4e2be64 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.ml.classification
 import scala.util.Random
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
 import org.apache.spark.mllib.classification.LogisticRegressionSuite._
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 7cb9471e6986..32729470d5bf 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.ml.regression
 import scala.util.Random
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
 import org.apache.spark.mllib.regression.LabeledPoint

From 075a0b658289608c8732e07e26e14d736e673ce9 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 7 Oct 2015 15:58:07 -0700
Subject: [PATCH 169/896] [SPARK-10917] [SQL] improve performance of complex
 type in columnar cache

This PR improve the performance of complex types in columnar cache by using UnsafeProjection instead of KryoSerializer.

A simple benchmark show that this PR could improve the performance of scanning a cached table with complex columns by 15x (comparing to Spark 1.5).

Here is the code used to benchmark:

```
df = sc.range(1<<23).map(lambda i: Row(a=Row(b=i, c=str(i)), d=range(10), e=dict(zip(range(10), [str(i) for i in range(10)])))).toDF()
df.write.parquet("table")
```
```
df = sqlContext.read.parquet("table")
df.cache()
df.count()
t = time.time()
print df.select("*")._jdf.queryExecution().toRdd().count()
print time.time() - t
```

Author: Davies Liu <davies@databricks.com>

Closes #8971 from davies/complex.
---
 .../catalyst/expressions/UnsafeArrayData.java |   1 -
 .../spark/sql/types/ArrayBasedMapData.scala   |   5 +
 .../spark/sql/columnar/ColumnAccessor.scala   |  38 ++-
 .../spark/sql/columnar/ColumnBuilder.scala    |  40 ++-
 .../spark/sql/columnar/ColumnStats.scala      |  11 +-
 .../spark/sql/columnar/ColumnType.scala       | 219 +++++++++++++---
 .../spark/sql/columnar/ColumnStatsSuite.scala |   9 +-
 .../spark/sql/columnar/ColumnTypeSuite.scala  | 235 ++++--------------
 .../sql/columnar/ColumnarTestUtils.scala      |  18 +-
 .../columnar/InMemoryColumnarQuerySuite.scala |   8 +-
 .../NullableColumnAccessorSuite.scala         |  13 +-
 .../columnar/NullableColumnBuilderSuite.scala |  21 +-
 12 files changed, 352 insertions(+), 266 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index 6a16d3408316..fdd9125613a2 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -23,7 +23,6 @@
 import org.apache.spark.sql.types.*;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
-import org.apache.spark.unsafe.hash.Murmur3_x86_32;
 import org.apache.spark.unsafe.types.CalendarInterval;
 import org.apache.spark.unsafe.types.UTF8String;
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
index f6fa021adee9..52069598ee30 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
@@ -48,6 +48,11 @@ class ArrayBasedMapData(val keyArray: ArrayData, val valueArray: ArrayData) exte
 }
 
 object ArrayBasedMapData {
+  def apply(map: Map[Any, Any]): ArrayBasedMapData = {
+    val array = map.toArray
+    ArrayBasedMapData(array.map(_._1), array.map(_._2))
+  }
+
   def apply(keys: Array[Any], values: Array[Any]): ArrayBasedMapData = {
     new ArrayBasedMapData(new GenericArrayData(keys), new GenericArrayData(values))
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
index 2b1d7009874a..f04099f54c41 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.columnar
 
 import java.nio.{ByteBuffer, ByteOrder}
 
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.MutableRow
 import org.apache.spark.sql.columnar.compression.CompressibleColumnAccessor
 import org.apache.spark.sql.types._
@@ -61,6 +62,10 @@ private[sql] abstract class BasicColumnAccessor[JvmType](
   protected def underlyingBuffer = buffer
 }
 
+private[sql] class NullColumnAccess(buffer: ByteBuffer)
+  extends BasicColumnAccessor[Any](buffer, NULL)
+  with NullableColumnAccessor
+
 private[sql] abstract class NativeColumnAccessor[T <: AtomicType](
     override protected val buffer: ByteBuffer,
     override protected val columnType: NativeColumnType[T])
@@ -96,11 +101,23 @@ private[sql] class BinaryColumnAccessor(buffer: ByteBuffer)
   extends BasicColumnAccessor[Array[Byte]](buffer, BINARY)
   with NullableColumnAccessor
 
-private[sql] class FixedDecimalColumnAccessor(buffer: ByteBuffer, precision: Int, scale: Int)
-  extends NativeColumnAccessor(buffer, FIXED_DECIMAL(precision, scale))
+private[sql] class CompactDecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
+  extends NativeColumnAccessor(buffer, COMPACT_DECIMAL(dataType))
+
+private[sql] class DecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
+  extends BasicColumnAccessor[Decimal](buffer, LARGE_DECIMAL(dataType))
+  with NullableColumnAccessor
+
+private[sql] class StructColumnAccessor(buffer: ByteBuffer, dataType: StructType)
+  extends BasicColumnAccessor[InternalRow](buffer, STRUCT(dataType))
+  with NullableColumnAccessor
+
+private[sql] class ArrayColumnAccessor(buffer: ByteBuffer, dataType: ArrayType)
+  extends BasicColumnAccessor[ArrayData](buffer, ARRAY(dataType))
+  with NullableColumnAccessor
 
-private[sql] class GenericColumnAccessor(buffer: ByteBuffer, dataType: DataType)
-  extends BasicColumnAccessor[Array[Byte]](buffer, GENERIC(dataType))
+private[sql] class MapColumnAccessor(buffer: ByteBuffer, dataType: MapType)
+  extends BasicColumnAccessor[MapData](buffer, MAP(dataType))
   with NullableColumnAccessor
 
 private[sql] object ColumnAccessor {
@@ -108,6 +125,7 @@ private[sql] object ColumnAccessor {
     val buf = buffer.order(ByteOrder.nativeOrder)
 
     dataType match {
+      case NullType => new NullColumnAccess(buf)
       case BooleanType => new BooleanColumnAccessor(buf)
       case ByteType => new ByteColumnAccessor(buf)
       case ShortType => new ShortColumnAccessor(buf)
@@ -117,9 +135,15 @@ private[sql] object ColumnAccessor {
       case DoubleType => new DoubleColumnAccessor(buf)
       case StringType => new StringColumnAccessor(buf)
       case BinaryType => new BinaryColumnAccessor(buf)
-      case DecimalType.Fixed(precision, scale) if precision < 19 =>
-        new FixedDecimalColumnAccessor(buf, precision, scale)
-      case other => new GenericColumnAccessor(buf, other)
+      case dt: DecimalType if dt.precision <= Decimal.MAX_LONG_DIGITS =>
+        new CompactDecimalColumnAccessor(buf, dt)
+      case dt: DecimalType => new DecimalColumnAccessor(buf, dt)
+      case struct: StructType => new StructColumnAccessor(buf, struct)
+      case array: ArrayType => new ArrayColumnAccessor(buf, array)
+      case map: MapType => new MapColumnAccessor(buf, map)
+      case udt: UserDefinedType[_] => ColumnAccessor(udt.sqlType, buffer)
+      case other =>
+        throw new Exception(s"not support type: $other")
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
index 2e60564f7c64..7a7345a7e004 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
@@ -77,6 +77,10 @@ private[sql] class BasicColumnBuilder[JvmType](
   }
 }
 
+private[sql] class NullColumnBuilder
+  extends BasicColumnBuilder[Any](new ObjectColumnStats(NullType), NULL)
+  with NullableColumnBuilder
+
 private[sql] abstract class ComplexColumnBuilder[JvmType](
     columnStats: ColumnStats,
     columnType: ColumnType[JvmType])
@@ -109,16 +113,20 @@ private[sql] class StringColumnBuilder extends NativeColumnBuilder(new StringCol
 
 private[sql] class BinaryColumnBuilder extends ComplexColumnBuilder(new BinaryColumnStats, BINARY)
 
-private[sql] class FixedDecimalColumnBuilder(
-    precision: Int,
-    scale: Int)
-  extends NativeColumnBuilder(
-    new FixedDecimalColumnStats(precision, scale),
-    FIXED_DECIMAL(precision, scale))
+private[sql] class CompactDecimalColumnBuilder(dataType: DecimalType)
+  extends NativeColumnBuilder(new DecimalColumnStats(dataType), COMPACT_DECIMAL(dataType))
+
+private[sql] class DecimalColumnBuilder(dataType: DecimalType)
+  extends ComplexColumnBuilder(new DecimalColumnStats(dataType), LARGE_DECIMAL(dataType))
+
+private[sql] class StructColumnBuilder(dataType: StructType)
+  extends ComplexColumnBuilder(new ObjectColumnStats(dataType), STRUCT(dataType))
+
+private[sql] class ArrayColumnBuilder(dataType: ArrayType)
+  extends ComplexColumnBuilder(new ObjectColumnStats(dataType), ARRAY(dataType))
 
-// TODO (lian) Add support for array, struct and map
-private[sql] class GenericColumnBuilder(dataType: DataType)
-  extends ComplexColumnBuilder(new GenericColumnStats(dataType), GENERIC(dataType))
+private[sql] class MapColumnBuilder(dataType: MapType)
+  extends ComplexColumnBuilder(new ObjectColumnStats(dataType), MAP(dataType))
 
 private[sql] object ColumnBuilder {
   val DEFAULT_INITIAL_BUFFER_SIZE = 1024 * 1024
@@ -145,6 +153,7 @@ private[sql] object ColumnBuilder {
       columnName: String = "",
       useCompression: Boolean = false): ColumnBuilder = {
     val builder: ColumnBuilder = dataType match {
+      case NullType => new NullColumnBuilder
       case BooleanType => new BooleanColumnBuilder
       case ByteType => new ByteColumnBuilder
       case ShortType => new ShortColumnBuilder
@@ -154,9 +163,16 @@ private[sql] object ColumnBuilder {
       case DoubleType => new DoubleColumnBuilder
       case StringType => new StringColumnBuilder
       case BinaryType => new BinaryColumnBuilder
-      case DecimalType.Fixed(precision, scale) if precision < 19 =>
-        new FixedDecimalColumnBuilder(precision, scale)
-      case other => new GenericColumnBuilder(other)
+      case dt: DecimalType if dt.precision <= Decimal.MAX_LONG_DIGITS =>
+        new CompactDecimalColumnBuilder(dt)
+      case dt: DecimalType => new DecimalColumnBuilder(dt)
+      case struct: StructType => new StructColumnBuilder(struct)
+      case array: ArrayType => new ArrayColumnBuilder(array)
+      case map: MapType => new MapColumnBuilder(map)
+      case udt: UserDefinedType[_] =>
+        return apply(udt.sqlType, initialSize, columnName, useCompression)
+      case other =>
+        throw new Exception(s"not suppported type: $other")
     }
 
     builder.initialize(initialSize, columnName, useCompression)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
index 3b5052b75406..ba61003ba41c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
@@ -235,7 +235,9 @@ private[sql] class BinaryColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](null, null, nullCount, count, sizeInBytes))
 }
 
-private[sql] class FixedDecimalColumnStats(precision: Int, scale: Int) extends ColumnStats {
+private[sql] class DecimalColumnStats(precision: Int, scale: Int) extends ColumnStats {
+  def this(dt: DecimalType) = this(dt.precision, dt.scale)
+
   protected var upper: Decimal = null
   protected var lower: Decimal = null
 
@@ -245,7 +247,8 @@ private[sql] class FixedDecimalColumnStats(precision: Int, scale: Int) extends C
       val value = row.getDecimal(ordinal, precision, scale)
       if (upper == null || value.compareTo(upper) > 0) upper = value
       if (lower == null || value.compareTo(lower) < 0) lower = value
-      sizeInBytes += FIXED_DECIMAL.defaultSize
+      // TODO: this is not right for DecimalType with precision > 18
+      sizeInBytes += 8
     }
   }
 
@@ -253,8 +256,8 @@ private[sql] class FixedDecimalColumnStats(precision: Int, scale: Int) extends C
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class GenericColumnStats(dataType: DataType) extends ColumnStats {
-  val columnType = GENERIC(dataType)
+private[sql] class ObjectColumnStats(dataType: DataType) extends ColumnStats {
+  val columnType = ColumnType(dataType)
 
   override def gatherStats(row: InternalRow, ordinal: Int): Unit = {
     super.gatherStats(row, ordinal)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index 3a0cea8750f1..3563eacb3a3e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -17,14 +17,15 @@
 
 package org.apache.spark.sql.columnar
 
-import java.nio.ByteBuffer
+import java.math.{BigDecimal, BigInteger}
+import java.nio.{ByteOrder, ByteBuffer}
 
 import scala.reflect.runtime.universe.TypeTag
 
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.MutableRow
-import org.apache.spark.sql.execution.SparkSqlSerializer
+import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.types.UTF8String
 
 /**
@@ -102,6 +103,16 @@ private[sql] sealed abstract class ColumnType[JvmType] {
   override def toString: String = getClass.getSimpleName.stripSuffix("$")
 }
 
+private[sql] object NULL extends ColumnType[Any] {
+
+  override def dataType: DataType = NullType
+  override def defaultSize: Int = 0
+  override def append(v: Any, buffer: ByteBuffer): Unit = {}
+  override def extract(buffer: ByteBuffer): Any = null
+  override def setField(row: MutableRow, ordinal: Int, value: Any): Unit = row.setNullAt(ordinal)
+  override def getField(row: InternalRow, ordinal: Int): Any = null
+}
+
 private[sql] abstract class NativeColumnType[T <: AtomicType](
     val dataType: T,
     val defaultSize: Int)
@@ -339,10 +350,8 @@ private[sql] object STRING extends NativeColumnType(StringType, 8) {
   override def clone(v: UTF8String): UTF8String = v.clone()
 }
 
-private[sql] case class FIXED_DECIMAL(precision: Int, scale: Int)
-  extends NativeColumnType(
-    DecimalType(precision, scale),
-    FIXED_DECIMAL.defaultSize) {
+private[sql] case class COMPACT_DECIMAL(precision: Int, scale: Int)
+  extends NativeColumnType(DecimalType(precision, scale), 8) {
 
   override def extract(buffer: ByteBuffer): Decimal = {
     Decimal(buffer.getLong(), precision, scale)
@@ -365,32 +374,39 @@ private[sql] case class FIXED_DECIMAL(precision: Int, scale: Int)
   }
 }
 
-private[sql] object FIXED_DECIMAL {
-  val defaultSize = 8
+private[sql] object COMPACT_DECIMAL {
+  def apply(dt: DecimalType): COMPACT_DECIMAL = {
+    COMPACT_DECIMAL(dt.precision, dt.scale)
+  }
 }
 
-private[sql] sealed abstract class ByteArrayColumnType(val defaultSize: Int)
-  extends ColumnType[Array[Byte]] {
+private[sql] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize: Int)
+  extends ColumnType[JvmType] {
+
+  def serialize(value: JvmType): Array[Byte]
+  def deserialize(bytes: Array[Byte]): JvmType
 
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
-    getField(row, ordinal).length + 4
+    // TODO: grow the buffer in append(), so serialize() will not be called twice
+    serialize(getField(row, ordinal)).length + 4
   }
 
-  override def append(v: Array[Byte], buffer: ByteBuffer): Unit = {
-    buffer.putInt(v.length).put(v, 0, v.length)
+  override def append(v: JvmType, buffer: ByteBuffer): Unit = {
+    val bytes = serialize(v)
+    buffer.putInt(bytes.length).put(bytes, 0, bytes.length)
   }
 
-  override def extract(buffer: ByteBuffer): Array[Byte] = {
+  override def extract(buffer: ByteBuffer): JvmType = {
     val length = buffer.getInt()
     val bytes = new Array[Byte](length)
     buffer.get(bytes, 0, length)
-    bytes
+    deserialize(bytes)
   }
 }
 
-private[sql] object BINARY extends ByteArrayColumnType(16) {
+private[sql] object BINARY extends ByteArrayColumnType[Array[Byte]](16) {
 
-  def dataType: DataType = BooleanType
+  def dataType: DataType = BinaryType
 
   override def setField(row: MutableRow, ordinal: Int, value: Array[Byte]): Unit = {
     row.update(ordinal, value)
@@ -399,24 +415,164 @@ private[sql] object BINARY extends ByteArrayColumnType(16) {
   override def getField(row: InternalRow, ordinal: Int): Array[Byte] = {
     row.getBinary(ordinal)
   }
+
+  def serialize(value: Array[Byte]): Array[Byte] = value
+  def deserialize(bytes: Array[Byte]): Array[Byte] = bytes
 }
 
-// Used to process generic objects (all types other than those listed above). Objects should be
-// serialized first before appending to the column `ByteBuffer`, and is also extracted as serialized
-// byte array.
-private[sql] case class GENERIC(dataType: DataType) extends ByteArrayColumnType(16) {
-  override def setField(row: MutableRow, ordinal: Int, value: Array[Byte]): Unit = {
-    row.update(ordinal, SparkSqlSerializer.deserialize[Any](value))
+private[sql] case class LARGE_DECIMAL(precision: Int, scale: Int)
+  extends ByteArrayColumnType[Decimal](12) {
+
+  override val dataType: DataType = DecimalType(precision, scale)
+
+  override def getField(row: InternalRow, ordinal: Int): Decimal = {
+    row.getDecimal(ordinal, precision, scale)
   }
 
-  override def getField(row: InternalRow, ordinal: Int): Array[Byte] = {
-    SparkSqlSerializer.serialize(row.get(ordinal, dataType))
+  override def setField(row: MutableRow, ordinal: Int, value: Decimal): Unit = {
+    row.setDecimal(ordinal, value, precision)
+  }
+
+  override def serialize(value: Decimal): Array[Byte] = {
+    value.toJavaBigDecimal.unscaledValue().toByteArray
+  }
+
+  override def deserialize(bytes: Array[Byte]): Decimal = {
+    val javaDecimal = new BigDecimal(new BigInteger(bytes), scale)
+    Decimal.apply(javaDecimal, precision, scale)
+  }
+}
+
+private[sql] object LARGE_DECIMAL {
+  def apply(dt: DecimalType): LARGE_DECIMAL = {
+    LARGE_DECIMAL(dt.precision, dt.scale)
+  }
+}
+
+private[sql] case class STRUCT(dataType: StructType)
+  extends ByteArrayColumnType[InternalRow](20) {
+
+  private val projection: UnsafeProjection =
+    UnsafeProjection.create(dataType)
+  private val numOfFields: Int = dataType.fields.size
+
+  override def setField(row: MutableRow, ordinal: Int, value: InternalRow): Unit = {
+    row.update(ordinal, value)
+  }
+
+  override def getField(row: InternalRow, ordinal: Int): InternalRow = {
+    row.getStruct(ordinal, numOfFields)
+  }
+
+  override def serialize(value: InternalRow): Array[Byte] = {
+    val unsafeRow = if (value.isInstanceOf[UnsafeRow]) {
+      value.asInstanceOf[UnsafeRow]
+    } else {
+      projection(value)
+    }
+    unsafeRow.getBytes
+  }
+
+  override def deserialize(bytes: Array[Byte]): InternalRow = {
+    val unsafeRow = new UnsafeRow
+    unsafeRow.pointTo(bytes, numOfFields, bytes.length)
+    unsafeRow
+  }
+
+  override def clone(v: InternalRow): InternalRow = v.copy()
+}
+
+private[sql] case class ARRAY(dataType: ArrayType)
+  extends ByteArrayColumnType[ArrayData](16) {
+
+  private lazy val projection = UnsafeProjection.create(Array[DataType](dataType))
+  private val mutableRow = new GenericMutableRow(new Array[Any](1))
+
+  override def setField(row: MutableRow, ordinal: Int, value: ArrayData): Unit = {
+    row.update(ordinal, value)
+  }
+
+  override def getField(row: InternalRow, ordinal: Int): ArrayData = {
+    row.getArray(ordinal)
+  }
+
+  override def serialize(value: ArrayData): Array[Byte] = {
+    val unsafeArray = if (value.isInstanceOf[UnsafeArrayData]) {
+      value.asInstanceOf[UnsafeArrayData]
+    } else {
+      mutableRow(0) = value
+      projection(mutableRow).getArray(0)
+    }
+    val outputBuffer =
+      ByteBuffer.allocate(4 + unsafeArray.getSizeInBytes).order(ByteOrder.nativeOrder())
+    outputBuffer.putInt(unsafeArray.numElements())
+    val underlying = outputBuffer.array()
+    unsafeArray.writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 4)
+    underlying
+  }
+
+  override def deserialize(bytes: Array[Byte]): ArrayData = {
+    val buffer = ByteBuffer.wrap(bytes).order(ByteOrder.nativeOrder())
+    val numElements = buffer.getInt
+    val array = new UnsafeArrayData
+    array.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 4, numElements, bytes.length - 4)
+    array
   }
+
+  override def clone(v: ArrayData): ArrayData = v.copy()
+}
+
+private[sql] case class MAP(dataType: MapType) extends ByteArrayColumnType[MapData](32) {
+
+  private lazy val projection: UnsafeProjection = UnsafeProjection.create(Array[DataType](dataType))
+  private val mutableRow = new GenericMutableRow(new Array[Any](1))
+
+  override def setField(row: MutableRow, ordinal: Int, value: MapData): Unit = {
+    row.update(ordinal, value)
+  }
+
+  override def getField(row: InternalRow, ordinal: Int): MapData = {
+    row.getMap(ordinal)
+  }
+
+  override def serialize(value: MapData): Array[Byte] = {
+    val unsafeMap = if (value.isInstanceOf[UnsafeMapData]) {
+      value.asInstanceOf[UnsafeMapData]
+    } else {
+      mutableRow(0) = value
+      projection(mutableRow).getMap(0)
+    }
+
+    val outputBuffer =
+      ByteBuffer.allocate(8 + unsafeMap.getSizeInBytes).order(ByteOrder.nativeOrder())
+    outputBuffer.putInt(unsafeMap.numElements())
+    val keyBytes = unsafeMap.keyArray().getSizeInBytes
+    outputBuffer.putInt(keyBytes)
+    val underlying = outputBuffer.array()
+    unsafeMap.keyArray().writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 8)
+    unsafeMap.valueArray().writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 8 + keyBytes)
+    underlying
+  }
+
+  override def deserialize(bytes: Array[Byte]): MapData = {
+    val buffer = ByteBuffer.wrap(bytes).order(ByteOrder.nativeOrder())
+    val numElements = buffer.getInt
+    val keyArraySize = buffer.getInt
+    val keyArray = new UnsafeArrayData
+    val valueArray = new UnsafeArrayData
+    keyArray.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 8, numElements, keyArraySize)
+    valueArray.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 8 + keyArraySize, numElements,
+      bytes.length - 8 - keyArraySize)
+    new UnsafeMapData(keyArray, valueArray)
+  }
+
+  override def clone(v: MapData): MapData = v.copy()
 }
 
 private[sql] object ColumnType {
   def apply(dataType: DataType): ColumnType[_] = {
     dataType match {
+      case NullType => NULL
       case BooleanType => BOOLEAN
       case ByteType => BYTE
       case ShortType => SHORT
@@ -426,9 +582,14 @@ private[sql] object ColumnType {
       case DoubleType => DOUBLE
       case StringType => STRING
       case BinaryType => BINARY
-      case DecimalType.Fixed(precision, scale) if precision < 19 =>
-        FIXED_DECIMAL(precision, scale)
-      case other => GENERIC(other)
+      case dt: DecimalType if dt.precision <= Decimal.MAX_LONG_DIGITS => COMPACT_DECIMAL(dt)
+      case dt: DecimalType => LARGE_DECIMAL(dt)
+      case arr: ArrayType => ARRAY(arr)
+      case map: MapType => MAP(map)
+      case struct: StructType => STRUCT(struct)
+      case udt: UserDefinedType[_] => apply(udt.sqlType)
+      case other =>
+        throw new Exception(s"Unsupported type: $other")
     }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
index 708fb4cf7933..89a664001bdd 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.sql.columnar
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.GenericInternalRow
 import org.apache.spark.sql.types._
 
@@ -76,11 +75,11 @@ class ColumnStatsSuite extends SparkFunSuite {
   def testDecimalColumnStats[T <: AtomicType, U <: ColumnStats](
       initialStatistics: GenericInternalRow): Unit = {
 
-    val columnStatsName = classOf[FixedDecimalColumnStats].getSimpleName
-    val columnType = FIXED_DECIMAL(15, 10)
+    val columnStatsName = classOf[DecimalColumnStats].getSimpleName
+    val columnType = COMPACT_DECIMAL(15, 10)
 
     test(s"$columnStatsName: empty") {
-      val columnStats = new FixedDecimalColumnStats(15, 10)
+      val columnStats = new DecimalColumnStats(15, 10)
       columnStats.collectedStatistics.values.zip(initialStatistics.values).foreach {
         case (actual, expected) => assert(actual === expected)
       }
@@ -89,7 +88,7 @@ class ColumnStatsSuite extends SparkFunSuite {
     test(s"$columnStatsName: non-empty") {
       import org.apache.spark.sql.columnar.ColumnarTestUtils._
 
-      val columnStats = new FixedDecimalColumnStats(15, 10)
+      val columnStats = new DecimalColumnStats(15, 10)
       val rows = Seq.fill(10)(makeRandomRow(columnType)) ++ Seq.fill(10)(makeNullRow(1))
       rows.foreach(columnStats.gatherStats(_, 0))
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
index a4cbe3525ef9..ceb8ad97bb32 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
@@ -19,28 +19,25 @@ package org.apache.spark.sql.columnar
 
 import java.nio.ByteBuffer
 
-import com.esotericsoftware.kryo.io.{Input, Output}
-import com.esotericsoftware.kryo.{Kryo, Serializer}
-
-import org.apache.spark.{Logging, SparkConf, SparkFunSuite}
-import org.apache.spark.serializer.KryoRegistrator
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
 import org.apache.spark.sql.columnar.ColumnarTestUtils._
-import org.apache.spark.sql.execution.SparkSqlSerializer
 import org.apache.spark.sql.types._
-import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.{Logging, SparkFunSuite}
 
 
 class ColumnTypeSuite extends SparkFunSuite with Logging {
   private val DEFAULT_BUFFER_SIZE = 512
-  private val MAP_GENERIC = GENERIC(MapType(IntegerType, StringType))
+  private val MAP_TYPE = MAP(MapType(IntegerType, StringType))
+  private val ARRAY_TYPE = ARRAY(ArrayType(IntegerType))
+  private val STRUCT_TYPE = STRUCT(StructType(StructField("a", StringType) :: Nil))
 
   test("defaultSize") {
     val checks = Map(
-      BOOLEAN -> 1, BYTE -> 1, SHORT -> 2, INT -> 4,
-      LONG -> 8, FLOAT -> 4, DOUBLE -> 8,
-      STRING -> 8, BINARY -> 16, FIXED_DECIMAL(15, 10) -> 8,
-      MAP_GENERIC -> 16)
+      NULL-> 0, BOOLEAN -> 1, BYTE -> 1, SHORT -> 2, INT -> 4, LONG -> 8,
+      FLOAT -> 4, DOUBLE -> 8, COMPACT_DECIMAL(15, 10) -> 8, LARGE_DECIMAL(20, 10) -> 12,
+      STRING -> 8, BINARY -> 16, STRUCT_TYPE -> 20, ARRAY_TYPE -> 16, MAP_TYPE -> 32)
 
     checks.foreach { case (columnType, expectedSize) =>
       assertResult(expectedSize, s"Wrong defaultSize for $columnType") {
@@ -50,18 +47,19 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
   }
 
   test("actualSize") {
-    def checkActualSize[JvmType](
-        columnType: ColumnType[JvmType],
-        value: JvmType,
+    def checkActualSize(
+        columnType: ColumnType[_],
+        value: Any,
         expected: Int): Unit = {
 
       assertResult(expected, s"Wrong actualSize for $columnType") {
         val row = new GenericMutableRow(1)
-        columnType.setField(row, 0, value)
+        row.update(0, CatalystTypeConverters.convertToCatalyst(value))
         columnType.actualSize(row, 0)
       }
     }
 
+    checkActualSize(NULL, null, 0)
     checkActualSize(BOOLEAN, true, 1)
     checkActualSize(BYTE, Byte.MaxValue, 1)
     checkActualSize(SHORT, Short.MaxValue, 2)
@@ -69,176 +67,65 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
     checkActualSize(LONG, Long.MaxValue, 8)
     checkActualSize(FLOAT, Float.MaxValue, 4)
     checkActualSize(DOUBLE, Double.MaxValue, 8)
-    checkActualSize(STRING, UTF8String.fromString("hello"), 4 + "hello".getBytes("utf-8").length)
+    checkActualSize(STRING, "hello", 4 + "hello".getBytes("utf-8").length)
     checkActualSize(BINARY, Array.fill[Byte](4)(0.toByte), 4 + 4)
-    checkActualSize(FIXED_DECIMAL(15, 10), Decimal(0, 15, 10), 8)
-
-    val generic = Map(1 -> "a")
-    checkActualSize(MAP_GENERIC, SparkSqlSerializer.serialize(generic), 4 + 8)
+    checkActualSize(COMPACT_DECIMAL(15, 10), Decimal(0, 15, 10), 8)
+    checkActualSize(LARGE_DECIMAL(20, 10), Decimal(0, 20, 10), 5)
+    checkActualSize(ARRAY_TYPE, Array[Any](1), 16)
+    checkActualSize(MAP_TYPE, Map(1 -> "a"), 25)
+    checkActualSize(STRUCT_TYPE, Row("hello"), 28)
   }
 
-  testNativeColumnType(BOOLEAN)(
-    (buffer: ByteBuffer, v: Boolean) => {
-      buffer.put((if (v) 1 else 0).toByte)
-    },
-    (buffer: ByteBuffer) => {
-      buffer.get() == 1
-    })
-
-  testNativeColumnType(BYTE)(_.put(_), _.get)
-
-  testNativeColumnType(SHORT)(_.putShort(_), _.getShort)
-
-  testNativeColumnType(INT)(_.putInt(_), _.getInt)
-
-  testNativeColumnType(LONG)(_.putLong(_), _.getLong)
-
-  testNativeColumnType(FLOAT)(_.putFloat(_), _.getFloat)
-
-  testNativeColumnType(DOUBLE)(_.putDouble(_), _.getDouble)
-
-  testNativeColumnType(FIXED_DECIMAL(15, 10))(
-    (buffer: ByteBuffer, decimal: Decimal) => {
-      buffer.putLong(decimal.toUnscaledLong)
-    },
-    (buffer: ByteBuffer) => {
-      Decimal(buffer.getLong(), 15, 10)
-    })
-
-
-  testNativeColumnType(STRING)(
-    (buffer: ByteBuffer, string: UTF8String) => {
-      val bytes = string.getBytes
-      buffer.putInt(bytes.length)
-      buffer.put(bytes)
-    },
-    (buffer: ByteBuffer) => {
-      val length = buffer.getInt()
-      val bytes = new Array[Byte](length)
-      buffer.get(bytes)
-      UTF8String.fromBytes(bytes)
-    })
-
-  testColumnType[Array[Byte]](
-    BINARY,
-    (buffer: ByteBuffer, bytes: Array[Byte]) => {
-      buffer.putInt(bytes.length).put(bytes)
-    },
-    (buffer: ByteBuffer) => {
-      val length = buffer.getInt()
-      val bytes = new Array[Byte](length)
-      buffer.get(bytes, 0, length)
-      bytes
-    })
-
-  test("GENERIC") {
-    val buffer = ByteBuffer.allocate(512)
-    val obj = Map(1 -> "spark", 2 -> "sql")
-    val serializedObj = SparkSqlSerializer.serialize(obj)
-
-    MAP_GENERIC.append(SparkSqlSerializer.serialize(obj), buffer)
-    buffer.rewind()
-
-    val length = buffer.getInt()
-    assert(length === serializedObj.length)
-
-    assertResult(obj, "Deserialized object didn't equal to the original object") {
-      val bytes = new Array[Byte](length)
-      buffer.get(bytes, 0, length)
-      SparkSqlSerializer.deserialize(bytes)
-    }
-
-    buffer.rewind()
-    buffer.putInt(serializedObj.length).put(serializedObj)
-
-    assertResult(obj, "Deserialized object didn't equal to the original object") {
-      buffer.rewind()
-      SparkSqlSerializer.deserialize(MAP_GENERIC.extract(buffer))
-    }
+  testNativeColumnType(BOOLEAN)
+  testNativeColumnType(BYTE)
+  testNativeColumnType(SHORT)
+  testNativeColumnType(INT)
+  testNativeColumnType(LONG)
+  testNativeColumnType(FLOAT)
+  testNativeColumnType(DOUBLE)
+  testNativeColumnType(COMPACT_DECIMAL(15, 10))
+  testNativeColumnType(STRING)
+
+  testColumnType(NULL)
+  testColumnType(BINARY)
+  testColumnType(LARGE_DECIMAL(20, 10))
+  testColumnType(STRUCT_TYPE)
+  testColumnType(ARRAY_TYPE)
+  testColumnType(MAP_TYPE)
+
+  def testNativeColumnType[T <: AtomicType](columnType: NativeColumnType[T]): Unit = {
+    testColumnType[T#InternalType](columnType)
   }
 
-  test("CUSTOM") {
-    val conf = new SparkConf()
-    conf.set("spark.kryo.registrator", "org.apache.spark.sql.columnar.Registrator")
-    val serializer = new SparkSqlSerializer(conf).newInstance()
-
-    val buffer = ByteBuffer.allocate(512)
-    val obj = CustomClass(Int.MaxValue, Long.MaxValue)
-    val serializedObj = serializer.serialize(obj).array()
-
-    MAP_GENERIC.append(serializer.serialize(obj).array(), buffer)
-    buffer.rewind()
-
-    val length = buffer.getInt
-    assert(length === serializedObj.length)
-    assert(13 == length) // id (1) + int (4) + long (8)
-
-    val genericSerializedObj = SparkSqlSerializer.serialize(obj)
-    assert(length != genericSerializedObj.length)
-    assert(length < genericSerializedObj.length)
-
-    assertResult(obj, "Custom deserialized object didn't equal the original object") {
-      val bytes = new Array[Byte](length)
-      buffer.get(bytes, 0, length)
-      serializer.deserialize(ByteBuffer.wrap(bytes))
-    }
-
-    buffer.rewind()
-    buffer.putInt(serializedObj.length).put(serializedObj)
-
-    assertResult(obj, "Custom deserialized object didn't equal the original object") {
-      buffer.rewind()
-      serializer.deserialize(ByteBuffer.wrap(MAP_GENERIC.extract(buffer)))
-    }
-  }
-
-  def testNativeColumnType[T <: AtomicType](
-      columnType: NativeColumnType[T])
-      (putter: (ByteBuffer, T#InternalType) => Unit,
-      getter: (ByteBuffer) => T#InternalType): Unit = {
-
-    testColumnType[T#InternalType](columnType, putter, getter)
-  }
-
-  def testColumnType[JvmType](
-      columnType: ColumnType[JvmType],
-      putter: (ByteBuffer, JvmType) => Unit,
-      getter: (ByteBuffer) => JvmType): Unit = {
+  def testColumnType[JvmType](columnType: ColumnType[JvmType]): Unit = {
 
     val buffer = ByteBuffer.allocate(DEFAULT_BUFFER_SIZE)
     val seq = (0 until 4).map(_ => makeRandomValue(columnType))
+    val converter = CatalystTypeConverters.createToScalaConverter(columnType.dataType)
 
-    test(s"$columnType.extract") {
+    test(s"$columnType append/extract") {
       buffer.rewind()
-      seq.foreach(putter(buffer, _))
+      seq.foreach(columnType.append(_, buffer))
 
       buffer.rewind()
       seq.foreach { expected =>
         logInfo("buffer = " + buffer + ", expected = " + expected)
         val extracted = columnType.extract(buffer)
         assert(
-          expected === extracted,
+          converter(expected) === converter(extracted),
           "Extracted value didn't equal to the original one. " +
             hexDump(expected) + " != " + hexDump(extracted) +
             ", buffer = " + dumpBuffer(buffer.duplicate().rewind().asInstanceOf[ByteBuffer]))
       }
     }
-
-    test(s"$columnType.append") {
-      buffer.rewind()
-      seq.foreach(columnType.append(_, buffer))
-
-      buffer.rewind()
-      seq.foreach { expected =>
-        assert(
-          expected === getter(buffer),
-          "Extracted value didn't equal to the original one")
-      }
-    }
   }
 
   private def hexDump(value: Any): String = {
-    value.toString.map(ch => Integer.toHexString(ch & 0xffff)).mkString(" ")
+    if (value == null) {
+      ""
+    } else {
+      value.toString.map(ch => Integer.toHexString(ch & 0xffff)).mkString(" ")
+    }
   }
 
   private def dumpBuffer(buff: ByteBuffer): Any = {
@@ -253,33 +140,13 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
 
   test("column type for decimal types with different precision") {
     (1 to 18).foreach { i =>
-      assertResult(FIXED_DECIMAL(i, 0)) {
+      assertResult(COMPACT_DECIMAL(i, 0)) {
         ColumnType(DecimalType(i, 0))
       }
     }
 
-    assertResult(GENERIC(DecimalType(19, 0))) {
+    assertResult(LARGE_DECIMAL(19, 0)) {
       ColumnType(DecimalType(19, 0))
     }
   }
 }
-
-private[columnar] final case class CustomClass(a: Int, b: Long)
-
-private[columnar] object CustomerSerializer extends Serializer[CustomClass] {
-  override def write(kryo: Kryo, output: Output, t: CustomClass) {
-    output.writeInt(t.a)
-    output.writeLong(t.b)
-  }
-  override def read(kryo: Kryo, input: Input, aClass: Class[CustomClass]): CustomClass = {
-    val a = input.readInt()
-    val b = input.readLong()
-    CustomClass(a, b)
-  }
-}
-
-private[columnar] final class Registrator extends KryoRegistrator {
-  override def registerClasses(kryo: Kryo) {
-    kryo.register(classOf[CustomClass], CustomerSerializer)
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
index 123a7053c0a6..964cdb52b245 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
@@ -21,8 +21,8 @@ import scala.collection.immutable.HashSet
 import scala.util.Random
 
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.types.{AtomicType, Decimal}
+import org.apache.spark.sql.catalyst.expressions.{GenericInternalRow, GenericMutableRow}
+import org.apache.spark.sql.types.{ArrayBasedMapData, GenericArrayData, AtomicType, Decimal}
 import org.apache.spark.unsafe.types.UTF8String
 
 object ColumnarTestUtils {
@@ -40,6 +40,7 @@ object ColumnarTestUtils {
     }
 
     (columnType match {
+      case NULL => null
       case BOOLEAN => Random.nextBoolean()
       case BYTE => (Random.nextInt(Byte.MaxValue * 2) - Byte.MaxValue).toByte
       case SHORT => (Random.nextInt(Short.MaxValue * 2) - Short.MaxValue).toShort
@@ -49,10 +50,15 @@ object ColumnarTestUtils {
       case DOUBLE => Random.nextDouble()
       case STRING => UTF8String.fromString(Random.nextString(Random.nextInt(32)))
       case BINARY => randomBytes(Random.nextInt(32))
-      case FIXED_DECIMAL(precision, scale) => Decimal(Random.nextLong() % 100, precision, scale)
-      case _ =>
-        // Using a random one-element map instead of an arbitrary object
-        Map(Random.nextInt() -> Random.nextString(Random.nextInt(32)))
+      case COMPACT_DECIMAL(precision, scale) => Decimal(Random.nextLong() % 100, precision, scale)
+      case LARGE_DECIMAL(precision, scale) => Decimal(Random.nextLong(), precision, scale)
+      case STRUCT(_) =>
+        new GenericInternalRow(Array[Any](UTF8String.fromString(Random.nextString(10))))
+      case ARRAY(_) =>
+        new GenericArrayData(Array[Any](Random.nextInt(), Random.nextInt()))
+      case MAP(_) =>
+        ArrayBasedMapData(
+          Map(Random.nextInt() -> UTF8String.fromString(Random.nextString(Random.nextInt(32)))))
     }).asInstanceOf[JvmType]
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
index ea5dd2be33d6..6265e40a0a07 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
@@ -157,7 +157,7 @@ class InMemoryColumnarQuerySuite extends QueryTest with SharedSQLContext {
 
     // Create a RDD for the schema
     val rdd =
-      sparkContext.parallelize((1 to 100), 10).map { i =>
+      sparkContext.parallelize((1 to 10000), 10).map { i =>
         Row(
           s"str${i}: test cache.",
           s"binary${i}: test cache.".getBytes("UTF-8"),
@@ -172,9 +172,9 @@ class InMemoryColumnarQuerySuite extends QueryTest with SharedSQLContext {
           BigDecimal(Long.MaxValue.toString + ".12345"),
           new java.math.BigDecimal(s"${i % 9 + 1}" + ".23456"),
           new Date(i),
-          new Timestamp(i),
-          (1 to i).toSeq,
-          (0 to i).map(j => s"map_key_$j" -> (Long.MaxValue - j)).toMap,
+          new Timestamp(i * 1000000L),
+          (i to i + 10).toSeq,
+          (i to i + 10).map(j => s"map_key_$j" -> (Long.MaxValue - j)).toMap,
           Row((i - 0.25).toFloat, Seq(true, false, null)))
       }
     sqlContext.createDataFrame(rdd, schema).registerTempTable("InMemoryCache_different_data_types")
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
index a3a23d37d766..78cebbf3cc93 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
@@ -20,8 +20,9 @@ package org.apache.spark.sql.columnar
 import java.nio.ByteBuffer
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.types.{ArrayType, StringType}
+import org.apache.spark.sql.types._
 
 class TestNullableColumnAccessor[JvmType](
     buffer: ByteBuffer,
@@ -40,8 +41,10 @@ class NullableColumnAccessorSuite extends SparkFunSuite {
   import org.apache.spark.sql.columnar.ColumnarTestUtils._
 
   Seq(
-    BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
-    STRING, BINARY, FIXED_DECIMAL(15, 10), GENERIC(ArrayType(StringType)))
+    NULL, BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
+    STRING, BINARY, COMPACT_DECIMAL(15, 10), LARGE_DECIMAL(20, 10),
+    STRUCT(StructType(StructField("a", StringType) :: Nil)),
+    ARRAY(ArrayType(IntegerType)), MAP(MapType(IntegerType, StringType)))
     .foreach {
     testNullableColumnAccessor(_)
   }
@@ -69,11 +72,13 @@ class NullableColumnAccessorSuite extends SparkFunSuite {
 
       val accessor = TestNullableColumnAccessor(builder.build(), columnType)
       val row = new GenericMutableRow(1)
+      val converter = CatalystTypeConverters.createToScalaConverter(columnType.dataType)
 
       (0 until 4).foreach { _ =>
         assert(accessor.hasNext)
         accessor.extractTo(row, 0)
-        assert(row.get(0, columnType.dataType) === randomRow.get(0, columnType.dataType))
+        assert(converter(row.get(0, columnType.dataType))
+          === converter(randomRow.get(0, columnType.dataType)))
 
         assert(accessor.hasNext)
         accessor.extractTo(row, 0)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
index 9557eead2710..fba08e626d72 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
@@ -18,7 +18,8 @@
 package org.apache.spark.sql.columnar
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.execution.SparkSqlSerializer
+import org.apache.spark.sql.catalyst.CatalystTypeConverters
+import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
 import org.apache.spark.sql.types._
 
 class TestNullableColumnBuilder[JvmType](columnType: ColumnType[JvmType])
@@ -35,11 +36,13 @@ object TestNullableColumnBuilder {
 }
 
 class NullableColumnBuilderSuite extends SparkFunSuite {
-  import ColumnarTestUtils._
+  import org.apache.spark.sql.columnar.ColumnarTestUtils._
 
   Seq(
     BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
-    STRING, BINARY, FIXED_DECIMAL(15, 10), GENERIC(ArrayType(StringType)))
+    STRING, BINARY, COMPACT_DECIMAL(15, 10), LARGE_DECIMAL(20, 10),
+    STRUCT(StructType(StructField("a", StringType) :: Nil)),
+    ARRAY(ArrayType(IntegerType)), MAP(MapType(IntegerType, StringType)))
     .foreach {
     testNullableColumnBuilder(_)
   }
@@ -74,6 +77,8 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       val columnBuilder = TestNullableColumnBuilder(columnType)
       val randomRow = makeRandomRow(columnType)
       val nullRow = makeNullRow(1)
+      val dataType = columnType.dataType
+      val converter = CatalystTypeConverters.createToScalaConverter(dataType)
 
       (0 until 4).foreach { _ =>
         columnBuilder.appendFrom(randomRow, 0)
@@ -88,14 +93,10 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       (1 to 7 by 2).foreach(assertResult(_, "Wrong null position")(buffer.getInt()))
 
       // For non-null values
+      val actual = new GenericMutableRow(new Array[Any](1))
       (0 until 4).foreach { _ =>
-        val actual = if (columnType.isInstanceOf[GENERIC]) {
-          SparkSqlSerializer.deserialize[Any](columnType.extract(buffer).asInstanceOf[Array[Byte]])
-        } else {
-          columnType.extract(buffer)
-        }
-
-        assert(actual === randomRow.get(0, columnType.dataType),
+        columnType.extract(buffer, actual, 0)
+        assert(converter(actual.get(0, dataType)) === converter(randomRow.get(0, dataType)),
           "Extracted value didn't equal to the original one")
       }
 

From 1bc435ae3afb7a007b8a8ff00dcad4738a9ff055 Mon Sep 17 00:00:00 2001
From: Nathan Howell <nhowell@godaddy.com>
Date: Wed, 7 Oct 2015 17:46:16 -0700
Subject: [PATCH 170/896] [SPARK-10064] [ML] Parallelize decision tree bin
 split calculations

Reimplement `DecisionTree.findSplitsBins` via `RDD` to parallelize bin calculation.

With large feature spaces the current implementation is very slow. This change limits the features that are distributed (or collected) to just the continuous features, and performs the split calculations in parallel. It completes on a real multi terabyte dataset in less than a minute instead of multiple hours.

Author: Nathan Howell <nhowell@godaddy.com>

Closes #8246 from NathanHowell/SPARK-10064.
---
 .../spark/mllib/tree/DecisionTree.scala       | 164 +++++++++---------
 .../spark/mllib/tree/impl/NodeIdCache.scala   |  18 +-
 .../spark/mllib/tree/DecisionTreeSuite.scala  |   6 -
 .../spark/mllib/tree/EnsembleTestHelper.scala |   4 +-
 4 files changed, 97 insertions(+), 95 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
index 4a77d4adcd86..53d6482f8057 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
@@ -19,7 +19,6 @@ package org.apache.spark.mllib.tree
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable
-import scala.collection.mutable.ArrayBuilder
 
 import org.apache.spark.Logging
 import org.apache.spark.annotation.{Experimental, Since}
@@ -643,8 +642,8 @@ object DecisionTree extends Serializable with Logging {
 
     val nodeToBestSplits = partitionAggregates.reduceByKey((a, b) => a.merge(b))
         .map { case (nodeIndex, aggStats) =>
-          val featuresForNode = nodeToFeaturesBc.value.flatMap { nodeToFeatures =>
-            Some(nodeToFeatures(nodeIndex))
+          val featuresForNode = nodeToFeaturesBc.value.map { nodeToFeatures =>
+            nodeToFeatures(nodeIndex)
           }
 
           // find best split for each node
@@ -976,8 +975,8 @@ object DecisionTree extends Serializable with Logging {
     val numFeatures = metadata.numFeatures
 
     // Sample the input only if there are continuous features.
-    val hasContinuousFeatures = Range(0, numFeatures).exists(metadata.isContinuous)
-    val sampledInput = if (hasContinuousFeatures) {
+    val continuousFeatures = Range(0, numFeatures).filter(metadata.isContinuous)
+    val sampledInput = if (continuousFeatures.nonEmpty) {
       // Calculate the number of samples for approximate quantile calculation.
       val requiredSamples = math.max(metadata.maxBins * metadata.maxBins, 10000)
       val fraction = if (requiredSamples < metadata.numExamples) {
@@ -986,81 +985,14 @@ object DecisionTree extends Serializable with Logging {
         1.0
       }
       logDebug("fraction of data used for calculating quantiles = " + fraction)
-      input.sample(withReplacement = false, fraction, new XORShiftRandom().nextInt()).collect()
+      input.sample(withReplacement = false, fraction, new XORShiftRandom().nextInt())
     } else {
-      new Array[LabeledPoint](0)
+      input.sparkContext.emptyRDD[LabeledPoint]
     }
 
     metadata.quantileStrategy match {
       case Sort =>
-        val splits = new Array[Array[Split]](numFeatures)
-        val bins = new Array[Array[Bin]](numFeatures)
-
-        // Find all splits.
-        // Iterate over all features.
-        var featureIndex = 0
-        while (featureIndex < numFeatures) {
-          if (metadata.isContinuous(featureIndex)) {
-            val featureSamples = sampledInput.map(lp => lp.features(featureIndex))
-            val featureSplits = findSplitsForContinuousFeature(featureSamples,
-              metadata, featureIndex)
-
-            val numSplits = featureSplits.length
-            val numBins = numSplits + 1
-            logDebug(s"featureIndex = $featureIndex, numSplits = $numSplits")
-            splits(featureIndex) = new Array[Split](numSplits)
-            bins(featureIndex) = new Array[Bin](numBins)
-
-            var splitIndex = 0
-            while (splitIndex < numSplits) {
-              val threshold = featureSplits(splitIndex)
-              splits(featureIndex)(splitIndex) =
-                new Split(featureIndex, threshold, Continuous, List())
-              splitIndex += 1
-            }
-            bins(featureIndex)(0) = new Bin(new DummyLowSplit(featureIndex, Continuous),
-              splits(featureIndex)(0), Continuous, Double.MinValue)
-
-            splitIndex = 1
-            while (splitIndex < numSplits) {
-              bins(featureIndex)(splitIndex) =
-                new Bin(splits(featureIndex)(splitIndex - 1), splits(featureIndex)(splitIndex),
-                  Continuous, Double.MinValue)
-              splitIndex += 1
-            }
-            bins(featureIndex)(numSplits) = new Bin(splits(featureIndex)(numSplits - 1),
-              new DummyHighSplit(featureIndex, Continuous), Continuous, Double.MinValue)
-          } else {
-            val numSplits = metadata.numSplits(featureIndex)
-            val numBins = metadata.numBins(featureIndex)
-            // Categorical feature
-            val featureArity = metadata.featureArity(featureIndex)
-            if (metadata.isUnordered(featureIndex)) {
-              // Unordered features
-              // 2^(maxFeatureValue - 1) - 1 combinations
-              splits(featureIndex) = new Array[Split](numSplits)
-              var splitIndex = 0
-              while (splitIndex < numSplits) {
-                val categories: List[Double] =
-                  extractMultiClassCategories(splitIndex + 1, featureArity)
-                splits(featureIndex)(splitIndex) =
-                  new Split(featureIndex, Double.MinValue, Categorical, categories)
-                splitIndex += 1
-              }
-            } else {
-              // Ordered features
-              //   Bins correspond to feature values, so we do not need to compute splits or bins
-              //   beforehand.  Splits are constructed as needed during training.
-              splits(featureIndex) = new Array[Split](0)
-            }
-            // For ordered features, bins correspond to feature values.
-            // For unordered categorical features, there is no need to construct the bins.
-            // since there is a one-to-one correspondence between the splits and the bins.
-            bins(featureIndex) = new Array[Bin](0)
-          }
-          featureIndex += 1
-        }
-        (splits, bins)
+        findSplitsBinsBySorting(sampledInput, metadata, continuousFeatures)
       case MinMax =>
         throw new UnsupportedOperationException("minmax not supported yet.")
       case ApproxHist =>
@@ -1068,6 +1000,82 @@ object DecisionTree extends Serializable with Logging {
     }
   }
 
+  private def findSplitsBinsBySorting(
+      input: RDD[LabeledPoint],
+      metadata: DecisionTreeMetadata,
+      continuousFeatures: IndexedSeq[Int]): (Array[Array[Split]], Array[Array[Bin]]) = {
+    def findSplits(
+        featureIndex: Int,
+        featureSamples: Iterable[Double]): (Int, (Array[Split], Array[Bin])) = {
+      val splits = {
+        val featureSplits = findSplitsForContinuousFeature(
+          featureSamples.toArray,
+          metadata,
+          featureIndex)
+        logDebug(s"featureIndex = $featureIndex, numSplits = ${featureSplits.length}")
+
+        featureSplits.map(threshold => new Split(featureIndex, threshold, Continuous, Nil))
+      }
+
+      val bins = {
+        val lowSplit = new DummyLowSplit(featureIndex, Continuous)
+        val highSplit = new DummyHighSplit(featureIndex, Continuous)
+
+        // tack the dummy splits on either side of the computed splits
+        val allSplits = lowSplit +: splits.toSeq :+ highSplit
+
+        // slide across the split points pairwise to allocate the bins
+        allSplits.sliding(2).map {
+          case Seq(left, right) => new Bin(left, right, Continuous, Double.MinValue)
+        }.toArray
+      }
+
+      (featureIndex, (splits, bins))
+    }
+
+    val continuousSplits = {
+      // reduce the parallelism for split computations when there are less
+      // continuous features than input partitions. this prevents tasks from
+      // being spun up that will definitely do no work.
+      val numPartitions = math.min(continuousFeatures.length, input.partitions.length)
+
+      input
+        .flatMap(point => continuousFeatures.map(idx => (idx, point.features(idx))))
+        .groupByKey(numPartitions)
+        .map { case (k, v) => findSplits(k, v) }
+        .collectAsMap()
+    }
+
+    val numFeatures = metadata.numFeatures
+    val (splits, bins) = Range(0, numFeatures).unzip {
+      case i if metadata.isContinuous(i) =>
+        val (split, bin) = continuousSplits(i)
+        metadata.setNumSplits(i, split.length)
+        (split, bin)
+
+      case i if metadata.isCategorical(i) && metadata.isUnordered(i) =>
+        // Unordered features
+        // 2^(maxFeatureValue - 1) - 1 combinations
+        val featureArity = metadata.featureArity(i)
+        val split = Range(0, metadata.numSplits(i)).map { splitIndex =>
+          val categories = extractMultiClassCategories(splitIndex + 1, featureArity)
+          new Split(i, Double.MinValue, Categorical, categories)
+        }
+
+        // For unordered categorical features, there is no need to construct the bins.
+        // since there is a one-to-one correspondence between the splits and the bins.
+        (split.toArray, Array.empty[Bin])
+
+      case i if metadata.isCategorical(i) =>
+        // Ordered features
+        //   Bins correspond to feature values, so we do not need to compute splits or bins
+        //   beforehand.  Splits are constructed as needed during training.
+        (Array.empty[Split], Array.empty[Bin])
+    }
+
+    (splits.toArray, bins.toArray)
+  }
+
   /**
    * Nested method to extract list of eligible categories given an index. It extracts the
    * position of ones in a binary representation of the input. If binary
@@ -1131,7 +1139,7 @@ object DecisionTree extends Serializable with Logging {
         logDebug("stride = " + stride)
 
         // iterate `valueCount` to find splits
-        val splitsBuilder = ArrayBuilder.make[Double]
+        val splitsBuilder = Array.newBuilder[Double]
         var index = 1
         // currentCount: sum of counts of values that have been visited
         var currentCount = valueCounts(0)._2
@@ -1163,8 +1171,8 @@ object DecisionTree extends Serializable with Logging {
     assert(splits.length > 0,
       s"DecisionTree could not handle feature $featureIndex since it had only 1 unique value." +
         "  Please remove this feature and then try again.")
-    // set number of splits accordingly
-    metadata.setNumSplits(featureIndex, splits.length)
+
+    // the split metadata must be updated on the driver
 
     splits
   }
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
index 0abed5411143..1c611976a930 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/NodeIdCache.scala
@@ -108,21 +108,21 @@ private[spark] class NodeIdCache(
 
     prevNodeIdsForInstances = nodeIdsForInstances
     nodeIdsForInstances = data.zip(nodeIdsForInstances).map {
-      dataPoint => {
+      case (point, node) => {
         var treeId = 0
         while (treeId < nodeIdUpdaters.length) {
-          val nodeIdUpdater = nodeIdUpdaters(treeId).getOrElse(dataPoint._2(treeId), null)
+          val nodeIdUpdater = nodeIdUpdaters(treeId).getOrElse(node(treeId), null)
           if (nodeIdUpdater != null) {
             val newNodeIndex = nodeIdUpdater.updateNodeIndex(
-              binnedFeatures = dataPoint._1.datum.binnedFeatures,
+              binnedFeatures = point.datum.binnedFeatures,
               bins = bins)
-            dataPoint._2(treeId) = newNodeIndex
+            node(treeId) = newNodeIndex
           }
 
           treeId += 1
         }
 
-        dataPoint._2
+        node
       }
     }
 
@@ -138,7 +138,7 @@ private[spark] class NodeIdCache(
       while (checkpointQueue.size > 1 && canDelete) {
         // We can delete the oldest checkpoint iff
         // the next checkpoint actually exists in the file system.
-        if (checkpointQueue.get(1).get.getCheckpointFile != None) {
+        if (checkpointQueue.get(1).get.getCheckpointFile.isDefined) {
           val old = checkpointQueue.dequeue()
 
           // Since the old checkpoint is not deleted by Spark,
@@ -159,11 +159,11 @@ private[spark] class NodeIdCache(
    * Call this after training is finished to delete any remaining checkpoints.
    */
   def deleteAllCheckpoints(): Unit = {
-    while (checkpointQueue.size > 0) {
+    while (checkpointQueue.nonEmpty) {
       val old = checkpointQueue.dequeue()
-      if (old.getCheckpointFile != None) {
+      for (checkpointFile <- old.getCheckpointFile) {
         val fs = FileSystem.get(old.sparkContext.hadoopConfiguration)
-        fs.delete(new Path(old.getCheckpointFile.get), true)
+        fs.delete(new Path(checkpointFile), true)
       }
     }
     if (prevNodeIdsForInstances != null) {
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/tree/DecisionTreeSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/tree/DecisionTreeSuite.scala
index 356d957f1590..1a4299db4eab 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/tree/DecisionTreeSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/tree/DecisionTreeSuite.scala
@@ -135,8 +135,6 @@ class DecisionTreeSuite extends SparkFunSuite with MLlibTestSparkContext {
       val featureSamples = Array(1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3).map(_.toDouble)
       val splits = DecisionTree.findSplitsForContinuousFeature(featureSamples, fakeMetadata, 0)
       assert(splits.length === 3)
-      assert(fakeMetadata.numSplits(0) === 3)
-      assert(fakeMetadata.numBins(0) === 4)
       // check returned splits are distinct
       assert(splits.distinct.length === splits.length)
     }
@@ -151,8 +149,6 @@ class DecisionTreeSuite extends SparkFunSuite with MLlibTestSparkContext {
       val featureSamples = Array(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 4, 5).map(_.toDouble)
       val splits = DecisionTree.findSplitsForContinuousFeature(featureSamples, fakeMetadata, 0)
       assert(splits.length === 2)
-      assert(fakeMetadata.numSplits(0) === 2)
-      assert(fakeMetadata.numBins(0) === 3)
       assert(splits(0) === 2.0)
       assert(splits(1) === 3.0)
     }
@@ -167,8 +163,6 @@ class DecisionTreeSuite extends SparkFunSuite with MLlibTestSparkContext {
       val featureSamples = Array(0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2).map(_.toDouble)
       val splits = DecisionTree.findSplitsForContinuousFeature(featureSamples, fakeMetadata, 0)
       assert(splits.length === 1)
-      assert(fakeMetadata.numSplits(0) === 1)
-      assert(fakeMetadata.numBins(0) === 2)
       assert(splits(0) === 1.0)
     }
   }
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/tree/EnsembleTestHelper.scala b/mllib/src/test/scala/org/apache/spark/mllib/tree/EnsembleTestHelper.scala
index 334bf3790fc7..3d3f80063f90 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/tree/EnsembleTestHelper.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/tree/EnsembleTestHelper.scala
@@ -69,8 +69,8 @@ object EnsembleTestHelper {
       required: Double,
       metricName: String = "mse") {
     val predictions = input.map(x => model.predict(x.features))
-    val errors = predictions.zip(input.map(_.label)).map { case (prediction, label) =>
-      label - prediction
+    val errors = predictions.zip(input).map { case (prediction, point) =>
+      point.label - prediction
     }
     val metric = metricName match {
       case "mse" =>

From 3aff0866a8601b4daf760d6bf175f68d5a0c8912 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Wed, 7 Oct 2015 17:50:35 -0700
Subject: [PATCH 171/896] [SPARK-9774] [ML] [PYSPARK] Add python api for ml
 regression isotonicregression

Add the Python API for isotonicregression.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8214 from holdenk/SPARK-9774-add-python-api-for-ml-regression-isotonicregression.
---
 .../ml/param/_shared_params_code_gen.py       |   5 +-
 python/pyspark/ml/param/shared.py             |  27 ++++
 python/pyspark/ml/regression.py               | 118 ++++++++++++++++++
 3 files changed, 149 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/ml/param/_shared_params_code_gen.py b/python/pyspark/ml/param/_shared_params_code_gen.py
index 5b39e5dd4e25..45a94e9c3296 100644
--- a/python/pyspark/ml/param/_shared_params_code_gen.py
+++ b/python/pyspark/ml/param/_shared_params_code_gen.py
@@ -133,7 +133,10 @@ def get$Name(self):
         ("thresholds", "Thresholds in multi-class classification to adjust the probability of " +
          "predicting each class. Array must have length equal to the number of classes, with " +
          "values >= 0. The class with largest value p/t is predicted, where p is the original " +
-         "probability of that class and t is the class' threshold.", None)]
+         "probability of that class and t is the class' threshold.", None),
+        ("weightCol", "weight column name. If this is not set or empty, we treat " +
+         "all instance weights as 1.0.", None)]
+
     code = []
     for name, doc, defaultValueStr in shared:
         param_code = _gen_param_header(name, doc, defaultValueStr)
diff --git a/python/pyspark/ml/param/shared.py b/python/pyspark/ml/param/shared.py
index af1218128602..8c438bc74f51 100644
--- a/python/pyspark/ml/param/shared.py
+++ b/python/pyspark/ml/param/shared.py
@@ -570,6 +570,33 @@ def getThresholds(self):
         return self.getOrDefault(self.thresholds)
 
 
+class HasWeightCol(Params):
+    """
+    Mixin for param weightCol: weight column name. If this is not set or empty, we treat all instance weights as 1.0..
+    """
+
+    # a placeholder to make it appear in the generated doc
+    weightCol = Param(Params._dummy(), "weightCol", "weight column name. If this is not set or empty, we treat all instance weights as 1.0.")
+
+    def __init__(self):
+        super(HasWeightCol, self).__init__()
+        #: param for weight column name. If this is not set or empty, we treat all instance weights as 1.0.
+        self.weightCol = Param(self, "weightCol", "weight column name. If this is not set or empty, we treat all instance weights as 1.0.")
+
+    def setWeightCol(self, value):
+        """
+        Sets the value of :py:attr:`weightCol`.
+        """
+        self._paramMap[self.weightCol] = value
+        return self
+
+    def getWeightCol(self):
+        """
+        Gets the value of weightCol or its default value.
+        """
+        return self.getOrDefault(self.weightCol)
+
+
 class DecisionTreeParams(Params):
     """
     Mixin for Decision Tree parameters.
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index e12abeba019f..eb5f4bd6d70b 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -25,6 +25,7 @@
 __all__ = ['AFTSurvivalRegression', 'AFTSurvivalRegressionModel',
            'DecisionTreeRegressor', 'DecisionTreeRegressionModel',
            'GBTRegressor', 'GBTRegressionModel',
+           'IsotonicRegression', 'IsotonicRegressionModel',
            'LinearRegression', 'LinearRegressionModel',
            'RandomForestRegressor', 'RandomForestRegressionModel']
 
@@ -142,6 +143,123 @@ def intercept(self):
         return self._call_java("intercept")
 
 
+@inherit_doc
+class IsotonicRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
+                         HasWeightCol):
+    """
+    .. note:: Experimental
+
+    Currently implemented using parallelized pool adjacent violators algorithm.
+    Only univariate (single feature) algorithm supported.
+
+    >>> from pyspark.mllib.linalg import Vectors
+    >>> df = sqlContext.createDataFrame([
+    ...     (1.0, Vectors.dense(1.0)),
+    ...     (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
+    >>> ir = IsotonicRegression()
+    >>> model = ir.fit(df)
+    >>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
+    >>> model.transform(test0).head().prediction
+    0.0
+    >>> model.boundaries
+    DenseVector([0.0, 1.0])
+    """
+
+    # a placeholder to make it appear in the generated doc
+    isotonic = \
+        Param(Params._dummy(), "isotonic",
+              "whether the output sequence should be isotonic/increasing (true) or" +
+              "antitonic/decreasing (false).")
+    featureIndex = \
+        Param(Params._dummy(), "featureIndex",
+              "The index of the feature if featuresCol is a vector column, no effect otherwise.")
+
+    @keyword_only
+    def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
+                 weightCol=None, isotonic=True, featureIndex=0):
+        """
+        __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
+                 weightCol=None, isotonic=True, featureIndex=0):
+        """
+        super(IsotonicRegression, self).__init__()
+        self._java_obj = self._new_java_obj(
+            "org.apache.spark.ml.regression.IsotonicRegression", self.uid)
+        self.isotonic = \
+            Param(self, "isotonic",
+                  "whether the output sequence should be isotonic/increasing (true) or" +
+                  "antitonic/decreasing (false).")
+        self.featureIndex = \
+            Param(self, "featureIndex",
+                  "The index of the feature if featuresCol is a vector column, no effect " +
+                  "otherwise.")
+        self._setDefault(isotonic=True, featureIndex=0)
+        kwargs = self.__init__._input_kwargs
+        self.setParams(**kwargs)
+
+    @keyword_only
+    def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
+                  weightCol=None, isotonic=True, featureIndex=0):
+        """
+        setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
+                 weightCol=None, isotonic=True, featureIndex=0):
+        Set the params for IsotonicRegression.
+        """
+        kwargs = self.setParams._input_kwargs
+        return self._set(**kwargs)
+
+    def _create_model(self, java_model):
+        return IsotonicRegressionModel(java_model)
+
+    def setIsotonic(self, value):
+        """
+        Sets the value of :py:attr:`isotonic`.
+        """
+        self._paramMap[self.isotonic] = value
+        return self
+
+    def getIsotonic(self):
+        """
+        Gets the value of isotonic or its default value.
+        """
+        return self.getOrDefault(self.isotonic)
+
+    def setFeatureIndex(self, value):
+        """
+        Sets the value of :py:attr:`featureIndex`.
+        """
+        self._paramMap[self.featureIndex] = value
+        return self
+
+    def getFeatureIndex(self):
+        """
+        Gets the value of featureIndex or its default value.
+        """
+        return self.getOrDefault(self.featureIndex)
+
+
+class IsotonicRegressionModel(JavaModel):
+    """
+    .. note:: Experimental
+
+    Model fitted by IsotonicRegression.
+    """
+
+    @property
+    def boundaries(self):
+        """
+        Model boundaries.
+        """
+        return self._call_java("boundaries")
+
+    @property
+    def predictions(self):
+        """
+        Predictions associated with the boundaries at the same index, monotone because of isotonic
+        regression.
+        """
+        return self._call_java("predictions")
+
+
 class TreeRegressorParams(object):
     """
     Private class to track supported impurity measures.

From b8f849b546739d3e4339563557509a51417fcb68 Mon Sep 17 00:00:00 2001
From: 0x0FFF <programmerag@gmail.com>
Date: Wed, 7 Oct 2015 23:12:35 -0700
Subject: [PATCH 172/896] [SPARK-7869][SQL] Adding Postgres JSON and JSONb data
 types support

This PR addresses [SPARK-7869](https://issues.apache.org/jira/browse/SPARK-7869)

Before the patch, attempt to load the table from Postgres with JSON/JSONb datatype caused error `java.sql.SQLException: Unsupported type 1111`
Postgres data types JSON and JSONb are now mapped to String on Spark side thus they can be loaded into DF and processed on Spark side

Example

Postgres:
```
create table test_json  (id int, value json);
create table test_jsonb (id int, value jsonb);

insert into test_json (id, value) values
(1, '{"field1":"value1","field2":"value2","field3":[1,2,3]}'::json),
(2, '{"field1":"value3","field2":"value4","field3":[4,5,6]}'::json),
(3, '{"field3":"value5","field4":"value6","field3":[7,8,9]}'::json);

insert into test_jsonb (id, value) values
(4, '{"field1":"value1","field2":"value2","field3":[1,2,3]}'::jsonb),
(5, '{"field1":"value3","field2":"value4","field3":[4,5,6]}'::jsonb),
(6, '{"field3":"value5","field4":"value6","field3":[7,8,9]}'::jsonb);
```

PySpark:
```
>>> import json
>>> df1 = sqlContext.read.jdbc("jdbc:postgresql://127.0.0.1:5432/test?user=testuser", "test_json")
>>> df1.map(lambda x: (x.id, json.loads(x.value))).map(lambda (id, value): (id, value.get('field3'))).collect()
[(1, [1, 2, 3]), (2, [4, 5, 6]), (3, [7, 8, 9])]
>>> df2 = sqlContext.read.jdbc("jdbc:postgresql://127.0.0.1:5432/test?user=testuser", "test_jsonb")
>>> df2.map(lambda x: (x.id, json.loads(x.value))).map(lambda (id, value): (id, value.get('field1'))).collect()
[(4, u'value1'), (5, u'value3'), (6, None)]
```

Author: 0x0FFF <programmerag@gmail.com>

Closes #8948 from 0x0FFF/SPARK-7869.
---
 .../scala/org/apache/spark/sql/jdbc/JdbcDialects.scala     | 4 ++++
 .../test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala   | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index 5abbfbf7b318..0cd356f22298 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -202,6 +202,10 @@ case object PostgresDialect extends JdbcDialect {
       Some(StringType)
     } else if (sqlType == Types.OTHER && typeName.equals("inet")) {
       Some(StringType)
+    } else if (sqlType == Types.OTHER && typeName.equals("json")) {
+      Some(StringType)
+    } else if (sqlType == Types.OTHER && typeName.equals("jsonb")) {
+      Some(StringType)
     } else None
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
index c4b039a9c535..bbf705ce9593 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
@@ -452,6 +452,13 @@ class JDBCSuite extends SparkFunSuite with BeforeAndAfter with SharedSQLContext
     assert(db2Dialect.getJDBCType(BooleanType).map(_.databaseTypeDefinition).get == "CHAR(1)")
   }
 
+  test("PostgresDialect type mapping") {
+    val Postgres = JdbcDialects.get("jdbc:postgresql://127.0.0.1/db")
+    // SPARK-7869: Testing JSON types handling
+    assert(Postgres.getCatalystType(java.sql.Types.OTHER, "json", 1, null) === Some(StringType))
+    assert(Postgres.getCatalystType(java.sql.Types.OTHER, "jsonb", 1, null) === Some(StringType))
+  }
+
   test("table exists query by jdbc dialect") {
     val MySQL = JdbcDialects.get("jdbc:mysql://127.0.0.1/db")
     val Postgres = JdbcDialects.get("jdbc:postgresql://127.0.0.1/db")

From cd28139c9b31201d54ee34b72da24417ece029f7 Mon Sep 17 00:00:00 2001
From: admackin <admackin@users.noreply.github.com>
Date: Thu, 8 Oct 2015 00:01:23 -0700
Subject: [PATCH 173/896] Akka framesize units should be specified

1.4 docs noted that the units were MB - i have assumed this is still the case

Author: admackin <admackin@users.noreply.github.com>

Closes #9025 from admackin/master.
---
 docs/configuration.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/configuration.md b/docs/configuration.md
index d99092e3c506..154a3aee6855 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -884,7 +884,7 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.akka.frameSize</code></td>
   <td>128</td>
   <td>
-    Maximum message size to allow in "control plane" communication; generally only applies to map
+    Maximum message size (in MB) to allow in "control plane" communication; generally only applies to map
     output size information sent between executors and the driver. Increase this if you are running
     jobs with many thousands of map and reduce tasks and see messages about the frame size.
   </td>

From 60150cf00a70e684d2cad864ab055ad53106938b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Baptiste=20Onofr=C3=A9?= <jbonofre@apache.org>
Date: Thu, 8 Oct 2015 11:38:39 +0100
Subject: [PATCH 174/896] [SPARK-10883] Add a note about how to build Spark
 sub-modules (reactor)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Author: Jean-Baptiste Onofré <jbonofre@apache.org>

Closes #8993 from jbonofre/SPARK-10883-2.
---
 docs/building-spark.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/docs/building-spark.md b/docs/building-spark.md
index 4db32cfd628b..4d929ee10a33 100644
--- a/docs/building-spark.md
+++ b/docs/building-spark.md
@@ -144,6 +144,17 @@ The ScalaTest plugin also supports running only a specific test suite as follows
 
     mvn -Dhadoop.version=... -DwildcardSuites=org.apache.spark.repl.ReplSuite test
 
+# Building submodules individually
+
+It's possible to build Spark sub-modules using the `mvn -pl` option.
+
+For instance, you can build the Spark Streaming module using:
+
+{% highlight bash %}
+mvn -pl :spark-streaming_2.10 clean install
+{% endhighlight %}
+
+where `spark-streaming_2.10` is the `artifactId` as defined in `streaming/pom.xml` file.
 
 # Continuous Compilation
 

From 59b0606f334a192e110e6a79003145931f62b928 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 8 Oct 2015 09:20:36 -0700
Subject: [PATCH 175/896] [SPARK-10999] [SQL] Coalesce should be able to handle
 UnsafeRow

Author: Cheng Lian <lian@databricks.com>

Closes #9024 from liancheng/spark-10999.coalesce-unsafe-row-handling.
---
 .../org/apache/spark/sql/execution/basicOperators.scala  | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index d4bbbeb39efe..7804b67ac236 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -17,20 +17,15 @@
 
 package org.apache.spark.sql.execution
 
-import java.util.Random
-
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD, ShuffledRDD}
-import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.sort.SortShuffleManager
-import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.util.random.PoissonSampler
 import org.apache.spark.util.MutablePair
+import org.apache.spark.util.random.PoissonSampler
 import org.apache.spark.{HashPartitioner, SparkEnv}
 
 /**
@@ -294,6 +289,8 @@ case class Coalesce(numPartitions: Int, child: SparkPlan) extends UnaryNode {
   protected override def doExecute(): RDD[InternalRow] = {
     child.execute().map(_.copy()).coalesce(numPartitions, shuffle = false)
   }
+
+  override def canProcessUnsafeRows: Boolean = true
 }
 
 /**

From 2df882ef14d376f9e49380ff15a8a5e6997024a7 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 8 Oct 2015 09:22:42 -0700
Subject: [PATCH 176/896] [SPARK-5775] [SPARK-5508] [SQL] Re-enable Hive
 Parquet array reading tests

Since SPARK-5508 has already been fixed.

Author: Cheng Lian <lian@databricks.com>

Closes #8999 from liancheng/spark-5775.enable-array-tests.
---
 .../test/scala/org/apache/spark/sql/hive/parquetSuites.scala   | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
index ff2d0a35e309..905eb7a3925b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/parquetSuites.scala
@@ -869,8 +869,7 @@ abstract class ParquetPartitioningTest extends QueryTest with SQLTestUtils with
         (1 to 10).map(i => Row(1, i, f"${i}_string")))
     }
 
-    // Re-enable this after SPARK-5508 is fixed
-    ignore(s"SPARK-5775 read array from $table") {
+    test(s"SPARK-5775 read array from $table") {
       checkAnswer(
         sql(s"SELECT arrayField, p FROM $table WHERE p = 1"),
         (1 to 10).map(i => Row(1 to i, 1)))

From 56a9692fc06077e31b37c00957e8011235f4e4eb Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 8 Oct 2015 09:47:58 -0700
Subject: [PATCH 177/896] [SPARK-10987] [YARN] Workaround for missing netty rpc
 disconnection event.

In YARN client mode, when the AM connects to the driver, it may be the case
that the driver never needs to send a message back to the AM (i.e., no
dynamic allocation or preemption). This triggers an issue in the netty rpc
backend where no disconnection event is sent to endpoints, and the AM never
exits after the driver shuts down.

The real fix is too complicated, so this is a quick hack to unblock YARN
client mode until we can work on the real fix. It forces the driver to
send a message to the AM when the AM registers, thus establishing that
connection and enabling the disconnection event when the driver goes
away.

Also, a minor side issue: when the executor is shutting down, it needs
to send an "ack" back to the driver when using the netty rpc backend; but
that "ack" wasn't being sent because the handler was shutting down the rpc
env before returning. So added a change to delay the shutdown a little bit,
allowing the ack to be sent back.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9021 from vanzin/SPARK-10987.
---
 .../spark/executor/CoarseGrainedExecutorBackend.scala      | 5 +++++
 .../scheduler/cluster/CoarseGrainedClusterMessage.scala    | 7 +++++++
 .../spark/scheduler/cluster/YarnSchedulerBackend.scala     | 2 ++
 .../org/apache/spark/deploy/yarn/ApplicationMaster.scala   | 3 +++
 4 files changed, 17 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
index fcd76ec52742..49059de50b42 100644
--- a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
+++ b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
@@ -110,6 +110,11 @@ private[spark] class CoarseGrainedExecutorBackend(
 
     case StopExecutor =>
       logInfo("Driver commanded a shutdown")
+      // Cannot shutdown here because an ack may need to be sent back to the caller. So send
+      // a message to self to actually do the shutdown.
+      self.send(Shutdown)
+
+    case Shutdown =>
       executor.stop()
       stop()
       rpcEnv.shutdown()
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
index d94743677783..e0d25dc50c98 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
@@ -100,4 +100,11 @@ private[spark] object CoarseGrainedClusterMessages {
 
   case class KillExecutors(executorIds: Seq[String]) extends CoarseGrainedClusterMessage
 
+  // Used internally by executors to shut themselves down.
+  case object Shutdown extends CoarseGrainedClusterMessage
+
+  // SPARK-10987: workaround for netty RPC issue; forces a connection from the driver back
+  // to the AM.
+  case object DriverHello extends CoarseGrainedClusterMessage
+
 }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index e0107f9d3dd1..38218b9c08fd 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -170,6 +170,8 @@ private[spark] abstract class YarnSchedulerBackend(
       case RegisterClusterManager(am) =>
         logInfo(s"ApplicationMaster registered as $am")
         amEndpoint = Option(am)
+        // See SPARK-10987.
+        am.send(DriverHello)
 
       case AddWebUIFilter(filterName, filterParams, proxyBase) =>
         addWebUIFilter(filterName, filterParams, proxyBase)
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index a2ccdc05d73c..3791eea5bf17 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -564,6 +564,9 @@ private[spark] class ApplicationMaster(
       case x: AddWebUIFilter =>
         logInfo(s"Add WebUI Filter. $x")
         driver.send(x)
+
+      case DriverHello =>
+        // SPARK-10987: no action needed for this message.
     }
 
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {

From e8f90d9dda3f87fef01c683462eac67aad750f60 Mon Sep 17 00:00:00 2001
From: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>
Date: Thu, 8 Oct 2015 09:53:44 -0700
Subject: [PATCH 178/896] [SPARK-10836] [SPARKR] Added sort(x, decreasing, col,
 ... ) method to DataFrame

the sort function can be used as an alternative to arrange(... ).
As arguments it accepts x - dataframe, decreasing - TRUE/FALSE, a list of orderings for columns and the list of columns, represented as string names

for example:
sort(df, TRUE, "col1","col2","col3","col5") # for example, if we want to sort some of the columns in the same order

sort(df, decreasing=TRUE, "col1")
sort(df, decreasing=c(TRUE,FALSE), "col1","col2")

Author: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>

Closes #8920 from NarineK/sparkrsort.
---
 R/pkg/R/DataFrame.R              | 47 ++++++++++++++++++++++++++------
 R/pkg/inst/tests/test_sparkSQL.R | 11 +++++++-
 2 files changed, 49 insertions(+), 9 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 85db3a5ed370..1b9137e6c793 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1298,8 +1298,10 @@ setClassUnion("characterOrColumn", c("character", "Column"))
 #' Sort a DataFrame by the specified column(s).
 #'
 #' @param x A DataFrame to be sorted.
-#' @param col Either a Column object or character vector indicating the field to sort on
+#' @param col A character or Column object vector indicating the fields to sort on
 #' @param ... Additional sorting fields
+#' @param decreasing A logical argument indicating sorting order for columns when
+#'                   a character vector is specified for col
 #' @return A DataFrame where all elements are sorted.
 #' @rdname arrange
 #' @name arrange
@@ -1312,23 +1314,52 @@ setClassUnion("characterOrColumn", c("character", "Column"))
 #' path <- "path/to/file.json"
 #' df <- jsonFile(sqlContext, path)
 #' arrange(df, df$col1)
-#' arrange(df, "col1")
 #' arrange(df, asc(df$col1), desc(abs(df$col2)))
+#' arrange(df, "col1", decreasing = TRUE)
+#' arrange(df, "col1", "col2", decreasing = c(TRUE, FALSE))
 #' }
 setMethod("arrange",
-          signature(x = "DataFrame", col = "characterOrColumn"),
+          signature(x = "DataFrame", col = "Column"),
           function(x, col, ...) {
-            if (class(col) == "character") {
-              sdf <- callJMethod(x@sdf, "sort", col, list(...))
-            } else if (class(col) == "Column") {
               jcols <- lapply(list(col, ...), function(c) {
                 c@jc
               })
-              sdf <- callJMethod(x@sdf, "sort", jcols)
-            }
+
+            sdf <- callJMethod(x@sdf, "sort", jcols)
             dataFrame(sdf)
           })
 
+#' @rdname arrange
+#' @export
+setMethod("arrange",
+          signature(x = "DataFrame", col = "character"),
+          function(x, col, ..., decreasing = FALSE) {
+
+            # all sorting columns
+            by <- list(col, ...)
+
+            if (length(decreasing) == 1) {
+              # in case only 1 boolean argument - decreasing value is specified,
+              # it will be used for all columns
+              decreasing <- rep(decreasing, length(by))
+            } else if (length(decreasing) != length(by)) {
+              stop("Arguments 'col' and 'decreasing' must have the same length")
+            }
+
+            # builds a list of columns of type Column
+            # example: [[1]] Column Species ASC
+            #          [[2]] Column Petal_Length DESC
+            jcols <- lapply(seq_len(length(decreasing)), function(i){
+              if (decreasing[[i]]) {
+                desc(getColumn(x, by[[i]]))
+              } else {
+                asc(getColumn(x, by[[i]]))
+              }
+            })
+
+            do.call("arrange", c(x, jcols))
+          })
+
 #' @rdname arrange
 #' @name orderby
 setMethod("orderBy",
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index bcf52b8fa788..e85de2507085 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -989,7 +989,7 @@ test_that("arrange() and orderBy() on a DataFrame", {
   sorted <- arrange(df, df$age)
   expect_equal(collect(sorted)[1,2], "Michael")
 
-  sorted2 <- arrange(df, "name")
+  sorted2 <- arrange(df, "name", decreasing = FALSE)
   expect_equal(collect(sorted2)[2,"age"], 19)
 
   sorted3 <- orderBy(df, asc(df$age))
@@ -999,6 +999,15 @@ test_that("arrange() and orderBy() on a DataFrame", {
   sorted4 <- orderBy(df, desc(df$name))
   expect_equal(first(sorted4)$name, "Michael")
   expect_equal(collect(sorted4)[3,"name"], "Andy")
+
+  sorted5 <- arrange(df, "age", "name", decreasing = TRUE)
+  expect_equal(collect(sorted5)[1,2], "Andy")
+
+  sorted6 <- arrange(df, "age","name", decreasing = c(T, F))
+  expect_equal(collect(sorted6)[1,2], "Andy")
+
+  sorted7 <- arrange(df, "name", decreasing = FALSE)
+  expect_equal(collect(sorted7)[2,"age"], 19)
 })
 
 test_that("filter() on a DataFrame", {

From 5c9fdf74e328c067388ba1109eb48bf9d128bcf4 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 8 Oct 2015 10:22:06 -0700
Subject: [PATCH 179/896] [SPARK-10998] [SQL] Show non-children in default
 Expression.toString

Its pretty hard to debug problems with expressions when you can't see all the arguments.

Before: `invoke()`
After: `invoke(inputObject#1, intField, IntegerType)`

Author: Michael Armbrust <michael@databricks.com>

Closes #9022 from marmbrus/expressionToString.
---
 .../spark/sql/catalyst/expressions/Expression.scala       | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
index 96284b9b421d..96fcc799e537 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
@@ -174,7 +174,13 @@ abstract class Expression extends TreeNode[Expression] {
     }.toString
   }
 
-  override def toString: String = prettyName + children.mkString("(", ",", ")")
+
+  private def flatArguments = productIterator.flatMap {
+    case t: Traversable[_] => t
+    case single => single :: Nil
+  }
+
+  override def toString: String = prettyName + flatArguments.mkString("(", ",", ")")
 }
 
 

From dcbd58a929be0058b1cfa59b14898c4c428a7680 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Thu, 8 Oct 2015 10:41:45 -0700
Subject: [PATCH 180/896] [SPARK-8654] [SQL] Fix Analysis exception when using
 NULL IN (...)

In the analysis phase , while processing the rules for IN predicate, we
compare the in-list types to the lhs expression type and generate
cast operation if necessary. In the case of NULL [NOT] IN expr1 , we end up
generating cast between in list types to NULL like cast (1 as NULL) which
is not a valid cast.

The fix is to not generate such a cast if the lhs type is a NullType instead
we translate the expression to Literal(Null).

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #8983 from dilipbiswal/spark_8654.
---
 .../catalyst/analysis/HiveTypeCoercion.scala  | 10 +++++++--
 .../sql/catalyst/analysis/AnalysisSuite.scala | 21 +++++++++++++++++++
 2 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 87a3845b2d9e..7192c931d2e5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -304,7 +304,10 @@ object HiveTypeCoercion {
   }
 
   /**
-   * Convert all expressions in in() list to the left operator type
+   * Convert the value and in list expressions to the common operator type
+   * by looking at all the argument types and finding the closest one that
+   * all the arguments can be cast to. When no common operator type is found
+   * an Analysis Exception is raised.
    */
   object InConversion extends Rule[LogicalPlan] {
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveExpressions {
@@ -312,7 +315,10 @@ object HiveTypeCoercion {
       case e if !e.childrenResolved => e
 
       case i @ In(a, b) if b.exists(_.dataType != a.dataType) =>
-        i.makeCopy(Array(a, b.map(Cast(_, a.dataType))))
+        findWiderCommonType(i.children.map(_.dataType)) match {
+          case Some(finalDataType) => i.withNewChildren(i.children.map(Cast(_, finalDataType)))
+          case None => i
+        }
     }
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 820b336aac75..77a4765e7751 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -135,4 +135,25 @@ class AnalysisSuite extends AnalysisTest {
     plan = testRelation.select(CreateStructUnsafe(Seq(a, (a + 1).as("a+1"))).as("col"))
     checkAnalysis(plan, plan)
   }
+
+  test("SPARK-8654: invalid CAST in NULL IN(...) expression") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(2))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisSuccess(plan)
+  }
+
+  test("SPARK-8654: different types in inlist but can be converted to a commmon type") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(1.2345))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisSuccess(plan)
+  }
+
+  test("SPARK-8654: check type compatibility error") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(true), Literal(1))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisError(plan, Seq("data type mismatch: Arguments must be same type"))
+  }
 }

From 0903c6489e9fa39db9575dace22a64015b9cd4c5 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Thu, 8 Oct 2015 11:16:20 -0700
Subject: [PATCH 181/896] [SPARK-9718] [ML] linear regression training summary
 all columns

LinearRegression training summary: The transformed dataset should hold all columns, not just selected ones like prediction and label. There is no real need to remove some, and the user may find them useful.

Author: Holden Karau <holden@pigscanfly.ca>

Closes #8564 from holdenk/SPARK-9718-LinearRegressionTrainingSummary-all-columns.
---
 .../ml/regression/LinearRegression.scala      | 35 ++++++++++++++-----
 .../ml/regression/LinearRegressionSuite.scala | 13 +++++++
 2 files changed, 40 insertions(+), 8 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 0dc084fdd12f..dd09667ef5a0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -170,9 +170,12 @@ class LinearRegression(override val uid: String)
       val intercept = yMean
 
       val model = new LinearRegressionModel(uid, coefficients, intercept)
+      // Handle possible missing or invalid prediction columns
+      val (summaryModel, predictionColName) = model.findSummaryModelAndPredictionCol()
+
       val trainingSummary = new LinearRegressionTrainingSummary(
-        model.transform(dataset),
-        $(predictionCol),
+        summaryModel.transform(dataset),
+        predictionColName,
         $(labelCol),
         $(featuresCol),
         Array(0D))
@@ -262,9 +265,12 @@ class LinearRegression(override val uid: String)
     if (handlePersistence) instances.unpersist()
 
     val model = copyValues(new LinearRegressionModel(uid, coefficients, intercept))
+    // Handle possible missing or invalid prediction columns
+    val (summaryModel, predictionColName) = model.findSummaryModelAndPredictionCol()
+
     val trainingSummary = new LinearRegressionTrainingSummary(
-      model.transform(dataset),
-      $(predictionCol),
+      summaryModel.transform(dataset),
+      predictionColName,
       $(labelCol),
       $(featuresCol),
       objectiveHistory)
@@ -316,13 +322,26 @@ class LinearRegressionModel private[ml] (
    */
   // TODO: decide on a good name before exposing to public API
   private[regression] def evaluate(dataset: DataFrame): LinearRegressionSummary = {
-    val t = udf { features: Vector => predict(features) }
-    val predictionAndObservations = dataset
-      .select(col($(labelCol)), t(col($(featuresCol))).as($(predictionCol)))
+    // Handle possible missing or invalid prediction columns
+    val (summaryModel, predictionColName) = findSummaryModelAndPredictionCol()
+    new LinearRegressionSummary(summaryModel.transform(dataset), predictionColName, $(labelCol))
+  }
 
-    new LinearRegressionSummary(predictionAndObservations, $(predictionCol), $(labelCol))
+  /**
+   * If the prediction column is set returns the current model and prediction column,
+   * otherwise generates a new column and sets it as the prediction column on a new copy
+   * of the current model.
+   */
+  private[regression] def findSummaryModelAndPredictionCol(): (LinearRegressionModel, String) = {
+    $(predictionCol) match {
+      case "" =>
+        val predictionColName = "prediction_" + java.util.UUID.randomUUID.toString()
+        (copy(ParamMap.empty).setPredictionCol(predictionColName), predictionColName)
+      case p => (this, p)
+    }
   }
 
+
   override protected def predict(features: Vector): Double = {
     dot(features, weights) + intercept
   }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 32729470d5bf..73a0a5caf864 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -462,9 +462,22 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("linear regression model training summary") {
     val trainer = new LinearRegression
     val model = trainer.fit(dataset)
+    val trainerNoPredictionCol = trainer.setPredictionCol("")
+    val modelNoPredictionCol = trainerNoPredictionCol.fit(dataset)
+
 
     // Training results for the model should be available
     assert(model.hasSummary)
+    assert(modelNoPredictionCol.hasSummary)
+
+    // Schema should be a superset of the input dataset
+    assert((dataset.schema.fieldNames.toSet + "prediction").subsetOf(
+      model.summary.predictions.schema.fieldNames.toSet))
+    // Validate that we re-insert a prediction column for evaluation
+    val modelNoPredictionColFieldNames = modelNoPredictionCol.summary.predictions.schema.fieldNames
+    assert((dataset.schema.fieldNames.toSet).subsetOf(
+      modelNoPredictionColFieldNames.toSet))
+    assert(modelNoPredictionColFieldNames.exists(s => s.startsWith("prediction_")))
 
     // Residuals in [[LinearRegressionResults]] should equal those manually computed
     val expectedResiduals = dataset.select("features", "label")

From 22683560027806144c3a1141904b63eda86ae96c Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 8 Oct 2015 11:27:46 -0700
Subject: [PATCH 182/896] [SPARK-7770] [ML] GBT validationTol change to compare
 with relative or absolute error

GBT compare ValidateError with tolerance switching between relative and absolute ones, where the former one is relative to the current loss on the training set.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8549 from yanboliang/spark-7770.
---
 .../spark/mllib/tree/GradientBoostedTrees.scala   |  3 ++-
 .../tree/configuration/BoostingStrategy.scala     | 15 +++++++++++----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
index 95ed48cea671..66a07e31360d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
@@ -262,7 +262,8 @@ object GradientBoostedTrees extends Logging {
           validationInput, validatePredError, baseLearnerWeights(m), baseLearners(m), loss)
         validatePredErrorCheckpointer.update(validatePredError)
         val currentValidateError = validatePredError.values.mean()
-        if (bestValidateError - currentValidateError < validationTol) {
+        if (bestValidateError - currentValidateError < validationTol * Math.max(
+          currentValidateError, 0.01)) {
           doneLearning = true
         } else if (currentValidateError < bestValidateError) {
           bestValidateError = currentValidateError
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
index b5c72fba3ede..fc13bcfd8e99 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
@@ -34,9 +34,16 @@ import org.apache.spark.mllib.tree.loss.{LogLoss, SquaredError, Loss}
  *                      weak hypotheses used in the final model.
  * @param learningRate Learning rate for shrinking the contribution of each estimator. The
  *                     learning rate should be between in the interval (0, 1]
- * @param validationTol Useful when runWithValidation is used. If the error rate on the
- *                      validation input between two iterations is less than the validationTol
- *                      then stop.  Ignored when
+ * @param validationTol validationTol is a condition which decides iteration termination when
+ *                      runWithValidation is used.
+ *                      The end of iteration is decided based on below logic:
+ *                      If the current loss on the validation set is > 0.01, the diff
+ *                      of validation error is compared to relative tolerance which is
+ *                      validationTol * (current loss on the validation set).
+ *                      If the current loss on the validation set is <= 0.01, the diff
+ *                      of validation error is compared to absolute tolerance which is
+ *                      validationTol * 0.01.
+ *                      Ignored when
  *                      [[org.apache.spark.mllib.tree.GradientBoostedTrees.run()]] is used.
  */
 @Since("1.2.0")
@@ -48,7 +55,7 @@ case class BoostingStrategy @Since("1.4.0") (
     // Optional boosting parameters
     @Since("1.2.0") @BeanProperty var numIterations: Int = 100,
     @Since("1.2.0") @BeanProperty var learningRate: Double = 0.1,
-    @Since("1.4.0") @BeanProperty var validationTol: Double = 1e-5) extends Serializable {
+    @Since("1.4.0") @BeanProperty var validationTol: Double = 0.001) extends Serializable {
 
   /**
    * Check validity of parameters.

From 2a6f614cd6ffb0cc32460018cb13dad2fd94520f Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Thu, 8 Oct 2015 11:51:58 -0700
Subject: [PATCH 183/896] [SPARK-11006] Rename NullColumnAccess as
 NullColumnAccessor

davies
I think NullColumnAccessor follows same convention for other accessors

Author: tedyu <yuzhihong@gmail.com>

Closes #9028 from tedyu/master.
---
 .../scala/org/apache/spark/sql/columnar/ColumnAccessor.scala  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
index f04099f54c41..62478667eb4f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
@@ -62,7 +62,7 @@ private[sql] abstract class BasicColumnAccessor[JvmType](
   protected def underlyingBuffer = buffer
 }
 
-private[sql] class NullColumnAccess(buffer: ByteBuffer)
+private[sql] class NullColumnAccessor(buffer: ByteBuffer)
   extends BasicColumnAccessor[Any](buffer, NULL)
   with NullableColumnAccessor
 
@@ -125,7 +125,7 @@ private[sql] object ColumnAccessor {
     val buf = buffer.order(ByteOrder.nativeOrder)
 
     dataType match {
-      case NullType => new NullColumnAccess(buf)
+      case NullType => new NullColumnAccessor(buf)
       case BooleanType => new BooleanColumnAccessor(buf)
       case ByteType => new ByteColumnAccessor(buf)
       case ShortType => new ShortColumnAccessor(buf)

From 82d275f27c3e9211ce69c5c8685a0fe90c0be26f Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Thu, 8 Oct 2015 11:56:44 -0700
Subject: [PATCH 184/896] [SPARK-10887] [SQL] Build HashedRelation outside of
 HashJoinNode.

This PR refactors `HashJoinNode` to take a existing `HashedRelation`. So, we can reuse this node for both `ShuffledHashJoin` and `BroadcastHashJoin`.

https://issues.apache.org/jira/browse/SPARK-10887

Author: Yin Huai <yhuai@databricks.com>

Closes #8953 from yhuai/SPARK-10887.
---
 .../codegen/GenerateMutableProjection.scala   |  2 +
 .../codegen/GenerateSafeProjection.scala      |  4 +-
 .../execution/local/BinaryHashJoinNode.scala  | 76 +++++++++++++++++
 .../local/BroadcastHashJoinNode.scala         | 59 +++++++++++++
 .../sql/execution/local/HashJoinNode.scala    | 67 +++++++--------
 .../execution/local/HashJoinNodeSuite.scala   | 85 ++++++++++++++++---
 .../sql/execution/local/LocalNodeTest.scala   | 20 ++++-
 7 files changed, 262 insertions(+), 51 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/local/BroadcastHashJoinNode.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
index d82d19185be0..e8ee64756d5d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
@@ -27,6 +27,8 @@ abstract class BaseMutableProjection extends MutableProjection
 /**
  * Generates byte code that produces a [[MutableRow]] object that can update itself based on a new
  * input [[InternalRow]] for a fixed set of [[Expression Expressions]].
+ * It exposes a `target` method, which is used to set the row that will be updated.
+ * The internal [[MutableRow]] object created internally is used only when `target` is not used.
  */
 object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => MutableProjection] {
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index ea09e029da90..9873630937d3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -23,8 +23,8 @@ import org.apache.spark.sql.types._
 
 
 /**
- * Generates byte code that produces a [[MutableRow]] object that can update itself based on a new
- * input [[InternalRow]] for a fixed set of [[Expression Expressions]].
+ * Generates byte code that produces a [[MutableRow]] object (not an [[UnsafeRow]]) that can update
+ * itself based on a new input [[InternalRow]] for a fixed set of [[Expression Expressions]].
  */
 object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection] {
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
new file mode 100644
index 000000000000..52dcb9e43c4e
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
@@ -0,0 +1,76 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql.execution.local
+
+import org.apache.spark.sql.SQLConf
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.execution.joins.{HashedRelation, BuildLeft, BuildRight, BuildSide}
+
+/**
+ * A [[HashJoinNode]] that builds the [[HashedRelation]] according to the value of
+ * `buildSide`. The actual work of this node is defined in [[HashJoinNode]].
+ */
+case class BinaryHashJoinNode(
+    conf: SQLConf,
+    leftKeys: Seq[Expression],
+    rightKeys: Seq[Expression],
+    buildSide: BuildSide,
+    left: LocalNode,
+    right: LocalNode)
+  extends BinaryLocalNode(conf) with HashJoinNode {
+
+  protected override val (streamedNode, streamedKeys) = buildSide match {
+    case BuildLeft => (right, rightKeys)
+    case BuildRight => (left, leftKeys)
+  }
+
+  private val (buildNode, buildKeys) = buildSide match {
+    case BuildLeft => (left, leftKeys)
+    case BuildRight => (right, rightKeys)
+  }
+
+  override def output: Seq[Attribute] = left.output ++ right.output
+
+  private def buildSideKeyGenerator: Projection = {
+    // We are expecting the data types of buildKeys and streamedKeys are the same.
+    assert(buildKeys.map(_.dataType) == streamedKeys.map(_.dataType))
+    if (isUnsafeMode) {
+      UnsafeProjection.create(buildKeys, buildNode.output)
+    } else {
+      newMutableProjection(buildKeys, buildNode.output)()
+    }
+  }
+
+  protected override def doOpen(): Unit = {
+    buildNode.open()
+    val hashedRelation = HashedRelation(buildNode, buildSideKeyGenerator)
+    // We have built the HashedRelation. So, close buildNode.
+    buildNode.close()
+
+    streamedNode.open()
+    // Set the HashedRelation used by the HashJoinNode.
+    withHashedRelation(hashedRelation)
+  }
+
+  override def close(): Unit = {
+    // Please note that we do not need to call the close method of our buildNode because
+    // it has been called in this.open.
+    streamedNode.close()
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BroadcastHashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BroadcastHashJoinNode.scala
new file mode 100644
index 000000000000..cd1c86516ec5
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BroadcastHashJoinNode.scala
@@ -0,0 +1,59 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql.execution.local
+
+import org.apache.spark.broadcast.Broadcast
+import org.apache.spark.sql.SQLConf
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.execution.joins.{BuildLeft, BuildRight, BuildSide, HashedRelation}
+
+/**
+ * A [[HashJoinNode]] for broadcast join. It takes a streamedNode and a broadcast
+ * [[HashedRelation]]. The actual work of this node is defined in [[HashJoinNode]].
+ */
+case class BroadcastHashJoinNode(
+    conf: SQLConf,
+    streamedKeys: Seq[Expression],
+    streamedNode: LocalNode,
+    buildSide: BuildSide,
+    buildOutput: Seq[Attribute],
+    hashedRelation: Broadcast[HashedRelation])
+  extends UnaryLocalNode(conf) with HashJoinNode {
+
+  override val child = streamedNode
+
+  // Because we do not pass in the buildNode, we take the output of buildNode to
+  // create the inputSet properly.
+  override def inputSet: AttributeSet = AttributeSet(child.output ++ buildOutput)
+
+  override def output: Seq[Attribute] = buildSide match {
+    case BuildRight => streamedNode.output ++ buildOutput
+    case BuildLeft => buildOutput ++ streamedNode.output
+  }
+
+  protected override def doOpen(): Unit = {
+    streamedNode.open()
+    // Set the HashedRelation used by the HashJoinNode.
+    withHashedRelation(hashedRelation.value)
+  }
+
+  override def close(): Unit = {
+    streamedNode.close()
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
index e7b24e3fca2b..b1dc719ca850 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
@@ -17,27 +17,23 @@
 
 package org.apache.spark.sql.execution.local
 
-import org.apache.spark.sql.SQLConf
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.execution.joins._
-import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
+ * An abstract node for sharing common functionality among different implementations of
+ * inner hash equi-join, notably [[BinaryHashJoinNode]] and [[BroadcastHashJoinNode]].
+ *
  * Much of this code is similar to [[org.apache.spark.sql.execution.joins.HashJoin]].
  */
-case class HashJoinNode(
-    conf: SQLConf,
-    leftKeys: Seq[Expression],
-    rightKeys: Seq[Expression],
-    buildSide: BuildSide,
-    left: LocalNode,
-    right: LocalNode) extends BinaryLocalNode(conf) {
-
-  private[this] lazy val (buildNode, buildKeys, streamedNode, streamedKeys) = buildSide match {
-    case BuildLeft => (left, leftKeys, right, rightKeys)
-    case BuildRight => (right, rightKeys, left, leftKeys)
-  }
+trait HashJoinNode {
+
+  self: LocalNode =>
+
+  protected def streamedKeys: Seq[Expression]
+  protected def streamedNode: LocalNode
+  protected def buildSide: BuildSide
 
   private[this] var currentStreamedRow: InternalRow = _
   private[this] var currentHashMatches: Seq[InternalRow] = _
@@ -49,23 +45,14 @@ case class HashJoinNode(
   private[this] var hashed: HashedRelation = _
   private[this] var joinKeys: Projection = _
 
-  override def output: Seq[Attribute] = left.output ++ right.output
-
-  private[this] def isUnsafeMode: Boolean = {
-    (codegenEnabled && unsafeEnabled
-      && UnsafeProjection.canSupport(buildKeys)
-      && UnsafeProjection.canSupport(schema))
-  }
-
-  private[this] def buildSideKeyGenerator: Projection = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(buildKeys, buildNode.output)
-    } else {
-      newMutableProjection(buildKeys, buildNode.output)()
-    }
+  protected def isUnsafeMode: Boolean = {
+    (codegenEnabled &&
+      unsafeEnabled &&
+      UnsafeProjection.canSupport(schema) &&
+      UnsafeProjection.canSupport(streamedKeys))
   }
 
-  private[this] def streamSideKeyGenerator: Projection = {
+  private def streamSideKeyGenerator: Projection = {
     if (isUnsafeMode) {
       UnsafeProjection.create(streamedKeys, streamedNode.output)
     } else {
@@ -73,10 +60,21 @@ case class HashJoinNode(
     }
   }
 
+  /**
+   * Sets the HashedRelation used by this node. This method needs to be called after
+   * before the first `next` gets called.
+   */
+  protected def withHashedRelation(hashedRelation: HashedRelation): Unit = {
+    hashed = hashedRelation
+  }
+
+  /**
+   * Custom open implementation to be overridden by subclasses.
+   */
+  protected def doOpen(): Unit
+
   override def open(): Unit = {
-    buildNode.open()
-    hashed = HashedRelation(buildNode, buildSideKeyGenerator)
-    streamedNode.open()
+    doOpen()
     joinRow = new JoinedRow
     resultProjection = {
       if (isUnsafeMode) {
@@ -128,9 +126,4 @@ case class HashJoinNode(
     }
     resultProjection(ret)
   }
-
-  override def close(): Unit = {
-    left.close()
-    right.close()
-  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
index 5c1bdb088eee..8c2e78b2a9db 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
@@ -17,10 +17,13 @@
 
 package org.apache.spark.sql.execution.local
 
+import org.mockito.Mockito.{mock, when}
+
+import org.apache.spark.broadcast.TorrentBroadcast
 import org.apache.spark.sql.SQLConf
 import org.apache.spark.sql.catalyst.dsl.expressions._
-import org.apache.spark.sql.execution.joins.{BuildLeft, BuildRight, BuildSide}
-
+import org.apache.spark.sql.catalyst.expressions.{InterpretedMutableProjection, UnsafeProjection, Expression}
+import org.apache.spark.sql.execution.joins.{HashedRelation, BuildLeft, BuildRight, BuildSide}
 
 class HashJoinNodeSuite extends LocalNodeTest {
 
@@ -33,6 +36,35 @@ class HashJoinNodeSuite extends LocalNodeTest {
     }
   }
 
+  /**
+   * Builds a [[HashedRelation]] based on a resolved `buildKeys`
+   * and a resolved `buildNode`.
+   */
+  private def buildHashedRelation(
+      conf: SQLConf,
+      buildKeys: Seq[Expression],
+      buildNode: LocalNode): HashedRelation = {
+
+    val isUnsafeMode =
+      conf.codegenEnabled &&
+        conf.unsafeEnabled &&
+        UnsafeProjection.canSupport(buildKeys)
+
+    val buildSideKeyGenerator =
+      if (isUnsafeMode) {
+        UnsafeProjection.create(buildKeys, buildNode.output)
+      } else {
+        new InterpretedMutableProjection(buildKeys, buildNode.output)
+      }
+
+    buildNode.prepare()
+    buildNode.open()
+    val hashedRelation = HashedRelation(buildNode, buildSideKeyGenerator)
+    buildNode.close()
+
+    hashedRelation
+  }
+
   /**
    * Test inner hash join with varying degrees of matches.
    */
@@ -51,20 +83,51 @@ class HashJoinNodeSuite extends LocalNodeTest {
       val rightInputMap = rightInput.toMap
       val leftNode = new DummyNode(joinNameAttributes, leftInput)
       val rightNode = new DummyNode(joinNicknameAttributes, rightInput)
-      val makeNode = (node1: LocalNode, node2: LocalNode) => {
-        resolveExpressions(new HashJoinNode(
-          conf, Seq('id1), Seq('id2), buildSide, node1, node2))
+      val makeBinaryHashJoinNode = (node1: LocalNode, node2: LocalNode) => {
+        val binaryHashJoinNode =
+          BinaryHashJoinNode(conf, Seq('id1), Seq('id2), buildSide, node1, node2)
+        resolveExpressions(binaryHashJoinNode)
+      }
+      val makeBroadcastJoinNode = (node1: LocalNode, node2: LocalNode) => {
+        val leftKeys = Seq('id1.attr)
+        val rightKeys = Seq('id2.attr)
+        // Figure out the build side and stream side.
+        val (buildNode, buildKeys, streamedNode, streamedKeys) = buildSide match {
+          case BuildLeft => (node1, leftKeys, node2, rightKeys)
+          case BuildRight => (node2, rightKeys, node1, leftKeys)
+        }
+        // Resolve the expressions of the build side and then create a HashedRelation.
+        val resolvedBuildNode = resolveExpressions(buildNode)
+        val resolvedBuildKeys = resolveExpressions(buildKeys, resolvedBuildNode)
+        val hashedRelation = buildHashedRelation(conf, resolvedBuildKeys, resolvedBuildNode)
+        val broadcastHashedRelation = mock(classOf[TorrentBroadcast[HashedRelation]])
+        when(broadcastHashedRelation.value).thenReturn(hashedRelation)
+
+        val hashJoinNode =
+          BroadcastHashJoinNode(
+            conf,
+            streamedKeys,
+            streamedNode,
+            buildSide,
+            resolvedBuildNode.output,
+            broadcastHashedRelation)
+        resolveExpressions(hashJoinNode)
       }
-      val makeUnsafeNode = if (unsafeAndCodegen) wrapForUnsafe(makeNode) else makeNode
-      val hashJoinNode = makeUnsafeNode(leftNode, rightNode)
+
       val expectedOutput = leftInput
         .filter { case (k, _) => rightInputMap.contains(k) }
         .map { case (k, v) => (k, v, k, rightInputMap(k)) }
-      val actualOutput = hashJoinNode.collect().map { row =>
-        // (id, name, id, nickname)
-        (row.getInt(0), row.getString(1), row.getInt(2), row.getString(3))
+
+      Seq(makeBinaryHashJoinNode, makeBroadcastJoinNode).foreach { makeNode =>
+        val makeUnsafeNode = if (unsafeAndCodegen) wrapForUnsafe(makeNode) else makeNode
+        val hashJoinNode = makeUnsafeNode(leftNode, rightNode)
+
+        val actualOutput = hashJoinNode.collect().map { row =>
+          // (id, name, id, nickname)
+          (row.getInt(0), row.getString(1), row.getInt(2), row.getString(3))
+        }
+        assert(actualOutput === expectedOutput)
       }
-      assert(actualOutput === expectedOutput)
     }
 
     test(s"$testNamePrefix: empty") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/LocalNodeTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/LocalNodeTest.scala
index 098050bcd223..615c41709361 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/LocalNodeTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/LocalNodeTest.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.execution.local
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.SQLConf
 import org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute
-import org.apache.spark.sql.catalyst.expressions.AttributeReference
+import org.apache.spark.sql.catalyst.expressions.{Expression, AttributeReference}
 import org.apache.spark.sql.types.{IntegerType, StringType}
 
 
@@ -67,4 +67,22 @@ class LocalNodeTest extends SparkFunSuite {
     }
   }
 
+  /**
+   * Resolve all expressions in `expressions` based on the `output` of `localNode`.
+   * It assumes that all expressions in the `localNode` are resolved.
+   */
+  protected def resolveExpressions(
+      expressions: Seq[Expression],
+      localNode: LocalNode): Seq[Expression] = {
+    require(localNode.expressions.forall(_.resolved))
+    val inputMap = localNode.output.map { a => (a.name, a) }.toMap
+    expressions.map { expression =>
+      expression.transformUp {
+        case UnresolvedAttribute(Seq(u)) =>
+          inputMap.getOrElse(u,
+            sys.error(s"Invalid Test: Cannot resolve $u given input $inputMap"))
+      }
+    }
+  }
+
 }

From af2a5544875b23b3b62fb6d4f3bf432828720008 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Thu, 8 Oct 2015 12:42:10 -0700
Subject: [PATCH 185/896] [SPARK-10337] [SQL] fix hive views on
 non-hive-compatible tables.

add a new config to deal with this special case.

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8990 from cloud-fan/view-master.
---
 .../scala/org/apache/spark/sql/SQLConf.scala  |  15 +-
 .../spark/sql/hive/HiveMetastoreCatalog.scala |  23 +++
 .../org/apache/spark/sql/hive/HiveQl.scala    | 164 +++++++++++++++---
 .../sql/hive/client/ClientInterface.scala     |  13 +-
 .../spark/sql/hive/client/ClientWrapper.scala |  31 ++++
 .../hive/execution/CreateViewAsSelect.scala   |  97 +++++++++++
 .../sql/hive/execution/SQLQuerySuite.scala    | 117 +++++++++++++
 7 files changed, 433 insertions(+), 27 deletions(-)
 create mode 100644 sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index e7bbc7d5db49..8f0f8910b36a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -319,6 +319,15 @@ private[spark] object SQLConf {
     doc = "When true, some predicates will be pushed down into the Hive metastore so that " +
           "unmatching partitions can be eliminated earlier.")
 
+  val CANONICALIZE_VIEW = booleanConf("spark.sql.canonicalizeView",
+    defaultValue = Some(false),
+    doc = "When true, CREATE VIEW will be handled by Spark SQL instead of Hive native commands.  " +
+          "Note that this function is experimental and should ony be used when you are using " +
+          "non-hive-compatible tables written by Spark SQL.  The SQL string used to create " +
+          "view should be fully qualified, i.e. use `tbl1`.`col1` instead of `*` whenever " +
+          "possible, or you may get wrong result.",
+    isPublic = false)
+
   val COLUMN_NAME_OF_CORRUPT_RECORD = stringConf("spark.sql.columnNameOfCorruptRecord",
     defaultValue = Some("_corrupt_record"),
     doc = "<TODO>")
@@ -362,7 +371,7 @@ private[spark] object SQLConf {
 
   val PARTITION_DISCOVERY_ENABLED = booleanConf("spark.sql.sources.partitionDiscovery.enabled",
     defaultValue = Some(true),
-    doc = "When true, automtically discover data partitions.")
+    doc = "When true, automatically discover data partitions.")
 
   val PARTITION_COLUMN_TYPE_INFERENCE =
     booleanConf("spark.sql.sources.partitionColumnTypeInference.enabled",
@@ -372,7 +381,7 @@ private[spark] object SQLConf {
   val PARTITION_MAX_FILES =
     intConf("spark.sql.sources.maxConcurrentWrites",
       defaultValue = Some(5),
-      doc = "The maximum number of concurent files to open before falling back on sorting when " +
+      doc = "The maximum number of concurrent files to open before falling back on sorting when " +
             "writing out files using dynamic partitioning.")
 
   // The output committer class used by HadoopFsRelation. The specified class needs to be a
@@ -471,6 +480,8 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def metastorePartitionPruning: Boolean = getConf(HIVE_METASTORE_PARTITION_PRUNING)
 
+  private[spark] def canonicalizeView: Boolean = getConf(CANONICALIZE_VIEW)
+
   private[spark] def sortMergeJoinEnabled: Boolean = getConf(SORTMERGE_JOIN)
 
   private[spark] def codegenEnabled: Boolean = getConf(CODEGEN_ENABLED, getConf(TUNGSTEN_ENABLED))
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index ea1521a48c8a..cf59bc0d590b 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -41,6 +41,7 @@ import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation, Partition => ParquetPartition, PartitionSpec, ResolvedDataSource}
 import org.apache.spark.sql.execution.{FileRelation, datasources}
 import org.apache.spark.sql.hive.client._
+import org.apache.spark.sql.hive.execution.HiveNativeCommand
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.{AnalysisException, SQLContext, SaveMode}
@@ -588,6 +589,28 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       // Wait until children are resolved.
       case p: LogicalPlan if !p.childrenResolved => p
       case p: LogicalPlan if p.resolved => p
+
+      case CreateViewAsSelect(table, child, allowExisting, replace, sql) =>
+        if (conf.canonicalizeView) {
+          if (allowExisting && replace) {
+            throw new AnalysisException(
+              "It is not allowed to define a view with both IF NOT EXISTS and OR REPLACE.")
+          }
+
+          val (dbName, tblName) = processDatabaseAndTableName(
+            table.specifiedDatabase.getOrElse(client.currentDatabase), table.name)
+
+          execution.CreateViewAsSelect(
+            table.copy(
+              specifiedDatabase = Some(dbName),
+              name = tblName),
+            child.output,
+            allowExisting,
+            replace)
+        } else {
+          HiveNativeCommand(sql)
+        }
+
       case p @ CreateTableAsSelect(table, child, allowExisting) =>
         val schema = if (table.schema.nonEmpty) {
           table.schema
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 256440a9a2e9..2bf22f544964 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -77,6 +77,16 @@ private[hive] case class CreateTableAsSelect(
     childrenResolved
 }
 
+private[hive] case class CreateViewAsSelect(
+    tableDesc: HiveTable,
+    child: LogicalPlan,
+    allowExisting: Boolean,
+    replace: Boolean,
+    sql: String) extends UnaryNode with Command {
+  override def output: Seq[Attribute] = Seq.empty[Attribute]
+  override lazy val resolved: Boolean = false
+}
+
 /** Provides a mapping from HiveQL statements to catalyst logical plans and expression trees. */
 private[hive] object HiveQl extends Logging {
   protected val nativeCommands = Seq(
@@ -99,7 +109,6 @@ private[hive] object HiveQl extends Logging {
     "TOK_ALTERTABLE_SKEWED",
     "TOK_ALTERTABLE_TOUCH",
     "TOK_ALTERTABLE_UNARCHIVE",
-    "TOK_ALTERVIEW",
     "TOK_ALTERVIEW_ADDPARTS",
     "TOK_ALTERVIEW_AS",
     "TOK_ALTERVIEW_DROPPARTS",
@@ -110,7 +119,6 @@ private[hive] object HiveQl extends Logging {
     "TOK_CREATEFUNCTION",
     "TOK_CREATEINDEX",
     "TOK_CREATEROLE",
-    "TOK_CREATEVIEW",
 
     "TOK_DESCDATABASE",
     "TOK_DESCFUNCTION",
@@ -254,12 +262,17 @@ private[hive] object HiveQl extends Logging {
      * Otherwise, there will be Null pointer exception,
      * when retrieving properties form HiveConf.
      */
-    val hContext = new Context(SessionState.get().getConf())
-    val node = ParseUtils.findRootNonNullToken((new ParseDriver).parse(sql, hContext))
+    val hContext = createContext()
+    val node = getAst(sql, hContext)
     hContext.clear()
     node
   }
 
+  private def createContext(): Context = new Context(SessionState.get().getConf())
+
+  private def getAst(sql: String, context: Context) =
+    ParseUtils.findRootNonNullToken((new ParseDriver).parse(sql, context))
+
   /**
    * Returns the HiveConf
    */
@@ -280,15 +293,18 @@ private[hive] object HiveQl extends Logging {
   /** Creates LogicalPlan for a given HiveQL string. */
   def createPlan(sql: String): LogicalPlan = {
     try {
-      val tree = getAst(sql)
-      if (nativeCommands contains tree.getText) {
+      val context = createContext()
+      val tree = getAst(sql, context)
+      val plan = if (nativeCommands contains tree.getText) {
         HiveNativeCommand(sql)
       } else {
-        nodeToPlan(tree) match {
+        nodeToPlan(tree, context) match {
           case NativePlaceholder => HiveNativeCommand(sql)
           case other => other
         }
       }
+      context.clear()
+      plan
     } catch {
       case pe: org.apache.hadoop.hive.ql.parse.ParseException =>
         pe.getMessage match {
@@ -342,7 +358,9 @@ private[hive] object HiveQl extends Logging {
     }
   }
 
-  protected def getClauses(clauseNames: Seq[String], nodeList: Seq[ASTNode]): Seq[Option[Node]] = {
+  protected def getClauses(
+      clauseNames: Seq[String],
+      nodeList: Seq[ASTNode]): Seq[Option[ASTNode]] = {
     var remainingNodes = nodeList
     val clauses = clauseNames.map { clauseName =>
       val (matches, nonMatches) = remainingNodes.partition(_.getText.toUpperCase == clauseName)
@@ -489,7 +507,43 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       }
   }
 
-  protected def nodeToPlan(node: Node): LogicalPlan = node match {
+  private def createView(
+      view: ASTNode,
+      context: Context,
+      viewNameParts: ASTNode,
+      query: ASTNode,
+      schema: Seq[HiveColumn],
+      properties: Map[String, String],
+      allowExist: Boolean,
+      replace: Boolean): CreateViewAsSelect = {
+    val (db, viewName) = extractDbNameTableName(viewNameParts)
+
+    val originalText = context.getTokenRewriteStream
+      .toString(query.getTokenStartIndex, query.getTokenStopIndex)
+
+    val tableDesc = HiveTable(
+      specifiedDatabase = db,
+      name = viewName,
+      schema = schema,
+      partitionColumns = Seq.empty[HiveColumn],
+      properties = properties,
+      serdeProperties = Map[String, String](),
+      tableType = VirtualView,
+      location = None,
+      inputFormat = None,
+      outputFormat = None,
+      serde = None,
+      viewText = Some(originalText))
+
+    // We need to keep the original SQL string so that if `spark.sql.canonicalizeView` is
+    // false, we can fall back to use hive native command later.
+    // We can remove this when parser is configurable(can access SQLConf) in the future.
+    val sql = context.getTokenRewriteStream
+      .toString(view.getTokenStartIndex, view.getTokenStopIndex)
+    CreateViewAsSelect(tableDesc, nodeToPlan(query, context), allowExist, replace, sql)
+  }
+
+  protected def nodeToPlan(node: ASTNode, context: Context): LogicalPlan = node match {
     // Special drop table that also uncaches.
     case Token("TOK_DROPTABLE",
            Token("TOK_TABNAME", tableNameParts) ::
@@ -521,14 +575,14 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       val Some(crtTbl) :: _ :: extended :: Nil =
         getClauses(Seq("TOK_CREATETABLE", "FORMATTED", "EXTENDED"), explainArgs)
       ExplainCommand(
-        nodeToPlan(crtTbl),
+        nodeToPlan(crtTbl, context),
         extended = extended.isDefined)
     case Token("TOK_EXPLAIN", explainArgs) =>
       // Ignore FORMATTED if present.
       val Some(query) :: _ :: extended :: Nil =
         getClauses(Seq("TOK_QUERY", "FORMATTED", "EXTENDED"), explainArgs)
       ExplainCommand(
-        nodeToPlan(query),
+        nodeToPlan(query, context),
         extended = extended.isDefined)
 
     case Token("TOK_DESCTABLE", describeArgs) =>
@@ -563,6 +617,73 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
         }
       }
 
+    case view @ Token("TOK_ALTERVIEW", children) =>
+      val Some(viewNameParts) :: maybeQuery :: ignores =
+        getClauses(Seq(
+          "TOK_TABNAME",
+          "TOK_QUERY",
+          "TOK_ALTERVIEW_ADDPARTS",
+          "TOK_ALTERVIEW_DROPPARTS",
+          "TOK_ALTERVIEW_PROPERTIES",
+          "TOK_ALTERVIEW_RENAME"), children)
+
+      // if ALTER VIEW doesn't have query part, let hive to handle it.
+      maybeQuery.map { query =>
+        createView(view, context, viewNameParts, query, Nil, Map(), false, true)
+      }.getOrElse(NativePlaceholder)
+
+    case view @ Token("TOK_CREATEVIEW", children)
+        if children.collect { case t @ Token("TOK_QUERY", _) => t }.nonEmpty =>
+      val Seq(
+        Some(viewNameParts),
+        Some(query),
+        maybeComment,
+        replace,
+        allowExisting,
+        maybeProperties,
+        maybeColumns,
+        maybePartCols
+      ) = getClauses(Seq(
+        "TOK_TABNAME",
+        "TOK_QUERY",
+        "TOK_TABLECOMMENT",
+        "TOK_ORREPLACE",
+        "TOK_IFNOTEXISTS",
+        "TOK_TABLEPROPERTIES",
+        "TOK_TABCOLNAME",
+        "TOK_VIEWPARTCOLS"), children)
+
+      // If the view is partitioned, we let hive handle it.
+      if (maybePartCols.isDefined) {
+        NativePlaceholder
+      } else {
+        val schema = maybeColumns.map { cols =>
+          BaseSemanticAnalyzer.getColumns(cols, true).asScala.map { field =>
+            // We can't specify column types when create view, so fill it with null first, and
+            // update it after the schema has been resolved later.
+            HiveColumn(field.getName, null, field.getComment)
+          }
+        }.getOrElse(Seq.empty[HiveColumn])
+
+        val properties = scala.collection.mutable.Map.empty[String, String]
+
+        maybeProperties.foreach {
+          case Token("TOK_TABLEPROPERTIES", list :: Nil) =>
+            properties ++= getProperties(list)
+        }
+
+        maybeComment.foreach {
+          case Token("TOK_TABLECOMMENT", child :: Nil) =>
+            val comment = BaseSemanticAnalyzer.unescapeSQLString(child.getText)
+            if (comment ne null) {
+              properties += ("comment" -> comment)
+            }
+        }
+
+        createView(view, context, viewNameParts, query, schema, properties.toMap,
+          allowExisting.isDefined, replace.isDefined)
+      }
+
     case Token("TOK_CREATETABLE", children)
         if children.collect { case t @ Token("TOK_QUERY", _) => t }.nonEmpty =>
       // Reference: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL
@@ -774,7 +895,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
         case _ => // Unsupport features
       }
 
-      CreateTableAsSelect(tableDesc, nodeToPlan(query), allowExisting != None)
+      CreateTableAsSelect(tableDesc, nodeToPlan(query, context), allowExisting != None)
 
     // If its not a "CTAS" like above then take it as a native command
     case Token("TOK_CREATETABLE", _) => NativePlaceholder
@@ -793,7 +914,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
             insertClauses.last match {
               case Token("TOK_CTE", cteClauses) =>
                 val cteRelations = cteClauses.map(node => {
-                  val relation = nodeToRelation(node).asInstanceOf[Subquery]
+                  val relation = nodeToRelation(node, context).asInstanceOf[Subquery]
                   (relation.alias, relation)
                 }).toMap
                 (Some(args.head), insertClauses.init, Some(cteRelations))
@@ -847,7 +968,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
         }
 
         val relations = fromClause match {
-          case Some(f) => nodeToRelation(f)
+          case Some(f) => nodeToRelation(f, context)
           case None => OneRowRelation
         }
 
@@ -1094,7 +1215,8 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       cteRelations.map(With(query, _)).getOrElse(query)
 
     // HIVE-9039 renamed TOK_UNION => TOK_UNIONALL while adding TOK_UNIONDISTINCT
-    case Token("TOK_UNIONALL", left :: right :: Nil) => Union(nodeToPlan(left), nodeToPlan(right))
+    case Token("TOK_UNIONALL", left :: right :: Nil) =>
+      Union(nodeToPlan(left, context), nodeToPlan(right, context))
 
     case a: ASTNode =>
       throw new NotImplementedError(s"No parse rules for $node:\n ${dumpTree(a).toString} ")
@@ -1102,10 +1224,10 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
 
   val allJoinTokens = "(TOK_.*JOIN)".r
   val laterViewToken = "TOK_LATERAL_VIEW(.*)".r
-  def nodeToRelation(node: Node): LogicalPlan = node match {
+  def nodeToRelation(node: Node, context: Context): LogicalPlan = node match {
     case Token("TOK_SUBQUERY",
            query :: Token(alias, Nil) :: Nil) =>
-      Subquery(cleanIdentifier(alias), nodeToPlan(query))
+      Subquery(cleanIdentifier(alias), nodeToPlan(query, context))
 
     case Token(laterViewToken(isOuter), selectClause :: relationClause :: Nil) =>
       val Token("TOK_SELECT",
@@ -1121,7 +1243,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
           outer = isOuter.nonEmpty,
           Some(alias.toLowerCase),
           attributes.map(UnresolvedAttribute(_)),
-          nodeToRelation(relationClause))
+          nodeToRelation(relationClause, context))
 
     /* All relations, possibly with aliases or sampling clauses. */
     case Token("TOK_TABREF", clauses) =>
@@ -1189,7 +1311,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
         }.map(_._2)
 
       val isPreserved = tableOrdinals.map(i => (i - 1 < 0) || joinArgs(i - 1).getText == "PRESERVE")
-      val tables = tableOrdinals.map(i => nodeToRelation(joinArgs(i)))
+      val tables = tableOrdinals.map(i => nodeToRelation(joinArgs(i), context))
       val joinExpressions =
         tableOrdinals.map(i => joinArgs(i + 1).getChildren.asScala.map(nodeToExpr))
 
@@ -1244,8 +1366,8 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
         case "TOK_FULLOUTERJOIN" => FullOuter
         case "TOK_LEFTSEMIJOIN" => LeftSemi
       }
-      Join(nodeToRelation(relation1),
-        nodeToRelation(relation2),
+      Join(nodeToRelation(relation1, context),
+        nodeToRelation(relation2, context),
         joinType,
         other.headOption.map(nodeToExpr))
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
index 3811c152a7ae..915eae9d21e2 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
@@ -19,13 +19,12 @@ package org.apache.spark.sql.hive.client
 
 import java.io.PrintStream
 import java.util.{Map => JMap}
+import javax.annotation.Nullable
 
 import org.apache.spark.sql.catalyst.analysis.{NoSuchDatabaseException, NoSuchTableException}
 import org.apache.spark.sql.catalyst.expressions.Expression
 
-private[hive] case class HiveDatabase(
-    name: String,
-    location: String)
+private[hive] case class HiveDatabase(name: String, location: String)
 
 private[hive] abstract class TableType { val name: String }
 private[hive] case object ExternalTable extends TableType { override val name = "EXTERNAL_TABLE" }
@@ -45,7 +44,7 @@ private[hive] case class HivePartition(
     values: Seq[String],
     storage: HiveStorageDescriptor)
 
-private[hive] case class HiveColumn(name: String, hiveType: String, comment: String)
+private[hive] case class HiveColumn(name: String, @Nullable hiveType: String, comment: String)
 private[hive] case class HiveTable(
     specifiedDatabase: Option[String],
     name: String,
@@ -126,6 +125,12 @@ private[hive] trait ClientInterface {
   /** Returns the metadata for the specified table or None if it doens't exist. */
   def getTableOption(dbName: String, tableName: String): Option[HiveTable]
 
+  /** Creates a view with the given metadata. */
+  def createView(view: HiveTable): Unit
+
+  /** Updates the given view with new metadata. */
+  def alertView(view: HiveTable): Unit
+
   /** Creates a table with the given metadata. */
   def createTable(table: HiveTable): Unit
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
index 4d1e3ed9198e..8f6d448b2aef 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
@@ -354,6 +354,37 @@ private[hive] class ClientWrapper(
     qlTable
   }
 
+  private def toViewTable(view: HiveTable): metadata.Table = {
+    // TODO: this is duplicated with `toQlTable` except the table type stuff.
+    val tbl = new metadata.Table(view.database, view.name)
+    tbl.setTableType(HTableType.VIRTUAL_VIEW)
+    tbl.setSerializationLib(null)
+    tbl.clearSerDeInfo()
+
+    // TODO: we will save the same SQL string to original and expanded text, which is different
+    // from Hive.
+    tbl.setViewOriginalText(view.viewText.get)
+    tbl.setViewExpandedText(view.viewText.get)
+
+    tbl.setFields(view.schema.map(c => new FieldSchema(c.name, c.hiveType, c.comment)).asJava)
+    view.properties.foreach { case (k, v) => tbl.setProperty(k, v) }
+
+    // set owner
+    tbl.setOwner(conf.getUser)
+    // set create time
+    tbl.setCreateTime((System.currentTimeMillis() / 1000).asInstanceOf[Int])
+
+    tbl
+  }
+
+  override def createView(view: HiveTable): Unit = withHiveState {
+    client.createTable(toViewTable(view))
+  }
+
+  override def alertView(view: HiveTable): Unit = withHiveState {
+    client.alterTable(view.qualifiedName, toViewTable(view))
+  }
+
   override def createTable(table: HiveTable): Unit = withHiveState {
     val qlTable = toQlTable(table)
     client.createTable(qlTable)
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
new file mode 100644
index 000000000000..2b504ac974f0
--- /dev/null
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.hive.execution
+
+import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.hive.{HiveMetastoreTypes, HiveContext}
+import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
+import org.apache.spark.sql.execution.RunnableCommand
+import org.apache.spark.sql.hive.client.{HiveColumn, HiveTable}
+
+/**
+ * Create Hive view on non-hive-compatible tables by specifying schema ourselves instead of
+ * depending on Hive meta-store.
+ */
+// TODO: Note that this class can NOT canonicalize the view SQL string entirely, which is different
+// from Hive and may not work for some cases like create view on self join.
+private[hive] case class CreateViewAsSelect(
+    tableDesc: HiveTable,
+    childSchema: Seq[Attribute],
+    allowExisting: Boolean,
+    orReplace: Boolean) extends RunnableCommand {
+
+  assert(tableDesc.schema == Nil || tableDesc.schema.length == childSchema.length)
+  assert(tableDesc.viewText.isDefined)
+
+  override def run(sqlContext: SQLContext): Seq[Row] = {
+    val hiveContext = sqlContext.asInstanceOf[HiveContext]
+    val database = tableDesc.database
+    val viewName = tableDesc.name
+
+    if (hiveContext.catalog.tableExists(Seq(database, viewName))) {
+      if (allowExisting) {
+        // view already exists, will do nothing, to keep consistent with Hive
+      } else if (orReplace) {
+        hiveContext.catalog.client.alertView(prepareTable())
+      } else {
+        throw new AnalysisException(s"View $database.$viewName already exists. " +
+          "If you want to update the view definition, please use ALTER VIEW AS or " +
+          "CREATE OR REPLACE VIEW AS")
+      }
+    } else {
+      hiveContext.catalog.client.createView(prepareTable())
+    }
+
+    Seq.empty[Row]
+  }
+
+  private def prepareTable(): HiveTable = {
+    // setup column types according to the schema of child.
+    val schema = if (tableDesc.schema == Nil) {
+      childSchema.map { attr =>
+        HiveColumn(attr.name, HiveMetastoreTypes.toMetastoreType(attr.dataType), null)
+      }
+    } else {
+      childSchema.zip(tableDesc.schema).map { case (attr, col) =>
+        HiveColumn(col.name, HiveMetastoreTypes.toMetastoreType(attr.dataType), col.comment)
+      }
+    }
+
+    val columnNames = childSchema.map(f => verbose(f.name))
+
+    // When user specified column names for view, we should create a project to do the renaming.
+    // When no column name specified, we still need to create a project to declare the columns
+    // we need, to make us more robust to top level `*`s.
+    val projectList = if (tableDesc.schema == Nil) {
+      columnNames.mkString(", ")
+    } else {
+      columnNames.zip(tableDesc.schema.map(f => verbose(f.name))).map {
+        case (name, alias) => s"$name AS $alias"
+      }.mkString(", ")
+    }
+
+    val viewName = verbose(tableDesc.name)
+
+    val expandedText = s"SELECT $projectList FROM (${tableDesc.viewText.get}) $viewName"
+
+    tableDesc.copy(schema = schema, viewText = Some(expandedText))
+  }
+
+  // escape backtick with double-backtick in column name and wrap it with backtick.
+  private def verbose(name: String) = s"`${name.replaceAll("`", "``")}`"
+}
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 8c3f9ac20263..ec5b83b98e40 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1248,4 +1248,121 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
         """.stripMargin), Row("b", 6.0) :: Row("a", 7.0) :: Nil)
     }
   }
+
+  test("correctly parse CREATE VIEW statement") {
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt") {
+        val df = (1 until 10).map(i => i -> i).toDF("i", "j")
+        df.write.format("json").saveAsTable("jt")
+        sql(
+          """CREATE VIEW IF NOT EXISTS
+            |default.testView (c1 COMMENT 'blabla', c2 COMMENT 'blabla')
+            |COMMENT 'blabla'
+            |TBLPROPERTIES ('a' = 'b')
+            |AS SELECT * FROM jt""".stripMargin)
+        checkAnswer(sql("SELECT c1, c2 FROM testView ORDER BY c1"), (1 to 9).map(i => Row(i, i)))
+        sql("DROP VIEW testView")
+      }
+    }
+  }
+
+  test("correctly handle CREATE VIEW IF NOT EXISTS") {
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt", "jt2") {
+        sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
+        sql("CREATE VIEW testView AS SELECT id FROM jt")
+
+        val df = (1 until 10).map(i => i -> i).toDF("i", "j")
+        df.write.format("json").saveAsTable("jt2")
+        sql("CREATE VIEW IF NOT EXISTS testView AS SELECT * FROM jt2")
+
+        // make sure our view doesn't change.
+        checkAnswer(sql("SELECT * FROM testView ORDER BY id"), (1 to 9).map(i => Row(i)))
+        sql("DROP VIEW testView")
+      }
+    }
+  }
+
+  test("correctly handle CREATE OR REPLACE VIEW") {
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt", "jt2") {
+        sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
+        sql("CREATE OR REPLACE VIEW testView AS SELECT id FROM jt")
+        checkAnswer(sql("SELECT * FROM testView ORDER BY id"), (1 to 9).map(i => Row(i)))
+
+        val df = (1 until 10).map(i => i -> i).toDF("i", "j")
+        df.write.format("json").saveAsTable("jt2")
+        sql("CREATE OR REPLACE VIEW testView AS SELECT * FROM jt2")
+        // make sure the view has been changed.
+        checkAnswer(sql("SELECT * FROM testView ORDER BY i"), (1 to 9).map(i => Row(i, i)))
+
+        sql("DROP VIEW testView")
+
+        val e = intercept[AnalysisException] {
+          sql("CREATE OR REPLACE VIEW IF NOT EXISTS testView AS SELECT id FROM jt")
+        }
+        assert(e.message.contains("not allowed to define a view"))
+      }
+    }
+  }
+
+  test("correctly handle ALTER VIEW") {
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt", "jt2") {
+        sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
+        sql("CREATE VIEW testView AS SELECT id FROM jt")
+
+        val df = (1 until 10).map(i => i -> i).toDF("i", "j")
+        df.write.format("json").saveAsTable("jt2")
+        sql("ALTER VIEW testView AS SELECT * FROM jt2")
+        // make sure the view has been changed.
+        checkAnswer(sql("SELECT * FROM testView ORDER BY i"), (1 to 9).map(i => Row(i, i)))
+
+        sql("DROP VIEW testView")
+      }
+    }
+  }
+
+  test("create hive view for json table") {
+    // json table is not hive-compatible, make sure the new flag fix it.
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt") {
+        sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
+        sql("CREATE VIEW testView AS SELECT id FROM jt")
+        checkAnswer(sql("SELECT * FROM testView ORDER BY id"), (1 to 9).map(i => Row(i)))
+        sql("DROP VIEW testView")
+      }
+    }
+  }
+
+  test("create hive view for partitioned parquet table") {
+    // partitioned parquet table is not hive-compatible, make sure the new flag fix it.
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("parTable") {
+        val df = Seq(1 -> "a").toDF("i", "j")
+        df.write.format("parquet").partitionBy("i").saveAsTable("parTable")
+        sql("CREATE VIEW testView AS SELECT i, j FROM parTable")
+        checkAnswer(sql("SELECT * FROM testView"), Row(1, "a"))
+        sql("DROP VIEW testView")
+      }
+    }
+  }
+
+  test("create hive view for joined tables") {
+    // make sure the new flag can handle some complex cases like join and schema change.
+    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+      withTable("jt1", "jt2") {
+        sqlContext.range(1, 10).toDF("id1").write.format("json").saveAsTable("jt1")
+        sqlContext.range(1, 10).toDF("id2").write.format("json").saveAsTable("jt2")
+        sql("CREATE VIEW testView AS SELECT * FROM jt1 JOIN jt2 ON id1 == id2")
+        checkAnswer(sql("SELECT * FROM testView ORDER BY id1"), (1 to 9).map(i => Row(i, i)))
+
+        val df = (1 until 10).map(i => i -> i).toDF("id1", "newCol")
+        df.write.format("json").mode(SaveMode.Overwrite).saveAsTable("jt1")
+        checkAnswer(sql("SELECT * FROM testView ORDER BY id1"), (1 to 9).map(i => Row(i, i)))
+
+        sql("DROP VIEW testView")
+      }
+    }
+  }
 }

From a8226a9f14e81c0b6712a30f1a60276200faebac Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 8 Oct 2015 13:49:10 -0700
Subject: [PATCH 186/896] Revert [SPARK-8654] [SQL] Fix Analysis exception when
 using NULL IN

This reverts commit dcbd58a929be0058b1cfa59b14898c4c428a7680 from #8983

Author: Michael Armbrust <michael@databricks.com>

Closes #9034 from marmbrus/revert8654.
---
 .../catalyst/analysis/HiveTypeCoercion.scala  | 10 ++-------
 .../sql/catalyst/analysis/AnalysisSuite.scala | 21 -------------------
 2 files changed, 2 insertions(+), 29 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 7192c931d2e5..87a3845b2d9e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -304,10 +304,7 @@ object HiveTypeCoercion {
   }
 
   /**
-   * Convert the value and in list expressions to the common operator type
-   * by looking at all the argument types and finding the closest one that
-   * all the arguments can be cast to. When no common operator type is found
-   * an Analysis Exception is raised.
+   * Convert all expressions in in() list to the left operator type
    */
   object InConversion extends Rule[LogicalPlan] {
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveExpressions {
@@ -315,10 +312,7 @@ object HiveTypeCoercion {
       case e if !e.childrenResolved => e
 
       case i @ In(a, b) if b.exists(_.dataType != a.dataType) =>
-        findWiderCommonType(i.children.map(_.dataType)) match {
-          case Some(finalDataType) => i.withNewChildren(i.children.map(Cast(_, finalDataType)))
-          case None => i
-        }
+        i.makeCopy(Array(a, b.map(Cast(_, a.dataType))))
     }
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 77a4765e7751..820b336aac75 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -135,25 +135,4 @@ class AnalysisSuite extends AnalysisTest {
     plan = testRelation.select(CreateStructUnsafe(Seq(a, (a + 1).as("a+1"))).as("col"))
     checkAnalysis(plan, plan)
   }
-
-  test("SPARK-8654: invalid CAST in NULL IN(...) expression") {
-    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(2))), "a")() :: Nil,
-      LocalRelation()
-    )
-    assertAnalysisSuccess(plan)
-  }
-
-  test("SPARK-8654: different types in inlist but can be converted to a commmon type") {
-    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(1.2345))), "a")() :: Nil,
-      LocalRelation()
-    )
-    assertAnalysisSuccess(plan)
-  }
-
-  test("SPARK-8654: check type compatibility error") {
-    val plan = Project(Alias(In(Literal(null), Seq(Literal(true), Literal(1))), "a")() :: Nil,
-      LocalRelation()
-    )
-    assertAnalysisError(plan, Seq("data type mismatch: Arguments must be same type"))
-  }
 }

From 9e66a53c9955285a85c19f55c3ef62db2e1b868a Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 8 Oct 2015 14:28:14 -0700
Subject: [PATCH 187/896] [SPARK-10993] [SQL] Inital code generated encoder for
 product types

This PR is a first cut at code generating an encoder that takes a Scala `Product` type and converts it directly into the tungsten binary format.  This is done through the addition of a new set of expression that can be used to invoke methods on raw JVM objects, extracting fields and converting the result into the required format.  These can then be used directly in an `UnsafeProjection` allowing us to leverage the existing encoding logic.

According to some simple benchmarks, this can significantly speed up conversion (~4x).  However, replacing CatalystConverters is deferred to a later PR to keep this PR at a reasonable size.

```scala
case class SomeInts(a: Int, b: Int, c: Int, d: Int, e: Int)

val data = SomeInts(1, 2, 3, 4, 5)
val encoder = ProductEncoder[SomeInts]
val converter = CatalystTypeConverters.createToCatalystConverter(ScalaReflection.schemaFor[SomeInts].dataType)

(1 to 5).foreach {iter =>
  benchmark(s"converter $iter") {
    var i = 100000000
    while (i > 0) {
      val res = converter(data).asInstanceOf[InternalRow]
      assert(res.getInt(0) == 1)
      assert(res.getInt(1) == 2)
      i -= 1
    }
  }

  benchmark(s"encoder $iter") {
    var i = 100000000
    while (i > 0) {
      val res = encoder.toRow(data)
      assert(res.getInt(0) == 1)
      assert(res.getInt(1) == 2)
      i -= 1
    }
  }
}
```

Results:
```
[info] converter 1: 7170ms
[info] encoder 1: 1888ms
[info] converter 2: 6763ms
[info] encoder 2: 1824ms
[info] converter 3: 6912ms
[info] encoder 3: 1802ms
[info] converter 4: 7131ms
[info] encoder 4: 1798ms
[info] converter 5: 7350ms
[info] encoder 5: 1912ms
```

Author: Michael Armbrust <michael@databricks.com>

Closes #9019 from marmbrus/productEncoder.
---
 .../spark/sql/catalyst/ScalaReflection.scala  | 238 ++++++++++++-
 .../spark/sql/catalyst/encoders/Encoder.scala |  44 +++
 .../catalyst/encoders/ProductEncoder.scala    |  67 ++++
 .../expressions/codegen/CodeGenerator.scala   |   4 +-
 .../sql/catalyst/expressions/objects.scala    | 334 ++++++++++++++++++
 .../spark/sql/types/GenericArrayData.scala    |   9 +
 .../apache/spark/sql/types/ObjectType.scala   |  42 +++
 .../encoders/ProductEncoderSuite.scala        | 174 +++++++++
 8 files changed, 910 insertions(+), 2 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/types/ObjectType.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 2442341da106..8b733f2a0b91 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.catalyst
 
+import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.Utils
 import org.apache.spark.sql.catalyst.expressions._
@@ -75,6 +76,242 @@ trait ScalaReflection {
    */
   private def localTypeOf[T: TypeTag]: `Type` = typeTag[T].in(mirror).tpe
 
+  /**
+   * Returns the Spark SQL DataType for a given scala type.  Where this is not an exact mapping
+   * to a native type, an ObjectType is returned. Special handling is also used for Arrays including
+   * those that hold primitive types.
+   */
+  def dataTypeFor(tpe: `Type`): DataType = tpe match {
+    case t if t <:< definitions.IntTpe => IntegerType
+    case t if t <:< definitions.LongTpe => LongType
+    case t if t <:< definitions.DoubleTpe => DoubleType
+    case t if t <:< definitions.FloatTpe => FloatType
+    case t if t <:< definitions.ShortTpe => ShortType
+    case t if t <:< definitions.ByteTpe => ByteType
+    case t if t <:< definitions.BooleanTpe => BooleanType
+    case t if t <:< localTypeOf[Array[Byte]] => BinaryType
+    case _ =>
+      val className: String = tpe.erasure.typeSymbol.asClass.fullName
+      className match {
+        case "scala.Array" =>
+          val TypeRef(_, _, Seq(arrayType)) = tpe
+          val cls = arrayType match {
+            case t if t <:< definitions.IntTpe => classOf[Array[Int]]
+            case t if t <:< definitions.LongTpe => classOf[Array[Long]]
+            case t if t <:< definitions.DoubleTpe => classOf[Array[Double]]
+            case t if t <:< definitions.FloatTpe => classOf[Array[Float]]
+            case t if t <:< definitions.ShortTpe => classOf[Array[Short]]
+            case t if t <:< definitions.ByteTpe => classOf[Array[Byte]]
+            case t if t <:< definitions.BooleanTpe => classOf[Array[Boolean]]
+            case other =>
+              // There is probably a better way to do this, but I couldn't find it...
+              val elementType = dataTypeFor(other).asInstanceOf[ObjectType].cls
+              java.lang.reflect.Array.newInstance(elementType, 1).getClass
+
+          }
+          ObjectType(cls)
+        case other => ObjectType(Utils.classForName(className))
+      }
+  }
+
+  /** Returns expressions for extracting all the fields from the given type. */
+  def extractorsFor[T : TypeTag](inputObject: Expression): Seq[Expression] = {
+    ScalaReflectionLock.synchronized {
+      extractorFor(inputObject, typeTag[T].tpe).asInstanceOf[CreateStruct].children
+    }
+  }
+
+  /** Helper for extracting internal fields from a case class. */
+  protected def extractorFor(
+      inputObject: Expression,
+      tpe: `Type`): Expression = ScalaReflectionLock.synchronized {
+    if (!inputObject.dataType.isInstanceOf[ObjectType]) {
+      inputObject
+    } else {
+      tpe match {
+        case t if t <:< localTypeOf[Option[_]] =>
+          val TypeRef(_, _, Seq(optType)) = t
+          optType match {
+            // For primitive types we must manually unbox the value of the object.
+            case t if t <:< definitions.IntTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Integer]), inputObject),
+                "intValue",
+                IntegerType)
+            case t if t <:< definitions.LongTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Long]), inputObject),
+                "longValue",
+                LongType)
+            case t if t <:< definitions.DoubleTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Double]), inputObject),
+                "doubleValue",
+                DoubleType)
+            case t if t <:< definitions.FloatTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Float]), inputObject),
+                "floatValue",
+                FloatType)
+            case t if t <:< definitions.ShortTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Short]), inputObject),
+                "shortValue",
+                ShortType)
+            case t if t <:< definitions.ByteTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Byte]), inputObject),
+                "byteValue",
+                ByteType)
+            case t if t <:< definitions.BooleanTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Boolean]), inputObject),
+                "booleanValue",
+                BooleanType)
+
+            // For non-primitives, we can just extract the object from the Option and then recurse.
+            case other =>
+              val className: String = optType.erasure.typeSymbol.asClass.fullName
+              val classObj = Utils.classForName(className)
+              val optionObjectType = ObjectType(classObj)
+
+              val unwrapped = UnwrapOption(optionObjectType, inputObject)
+              expressions.If(
+                IsNull(unwrapped),
+                expressions.Literal.create(null, schemaFor(optType).dataType),
+                extractorFor(unwrapped, optType))
+          }
+
+        case t if t <:< localTypeOf[Product] =>
+          val formalTypeArgs = t.typeSymbol.asClass.typeParams
+          val TypeRef(_, _, actualTypeArgs) = t
+          val constructorSymbol = t.member(nme.CONSTRUCTOR)
+          val params = if (constructorSymbol.isMethod) {
+            constructorSymbol.asMethod.paramss
+          } else {
+            // Find the primary constructor, and use its parameter ordering.
+            val primaryConstructorSymbol: Option[Symbol] =
+              constructorSymbol.asTerm.alternatives.find(s =>
+                s.isMethod && s.asMethod.isPrimaryConstructor)
+
+            if (primaryConstructorSymbol.isEmpty) {
+              sys.error("Internal SQL error: Product object did not have a primary constructor.")
+            } else {
+              primaryConstructorSymbol.get.asMethod.paramss
+            }
+          }
+
+          CreateStruct(params.head.map { p =>
+            val fieldName = p.name.toString
+            val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
+            val fieldValue = Invoke(inputObject, fieldName, dataTypeFor(fieldType))
+            extractorFor(fieldValue, fieldType)
+          })
+
+        case t if t <:< localTypeOf[Array[_]] =>
+          val TypeRef(_, _, Seq(elementType)) = t
+          val elementDataType = dataTypeFor(elementType)
+          val Schema(dataType, nullable) = schemaFor(elementType)
+
+          if (!elementDataType.isInstanceOf[AtomicType]) {
+            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
+          } else {
+            NewInstance(
+              classOf[GenericArrayData],
+              inputObject :: Nil,
+              dataType = ArrayType(dataType, nullable))
+          }
+
+        case t if t <:< localTypeOf[Seq[_]] =>
+          val TypeRef(_, _, Seq(elementType)) = t
+          val elementDataType = dataTypeFor(elementType)
+          val Schema(dataType, nullable) = schemaFor(elementType)
+
+          if (!elementDataType.isInstanceOf[AtomicType]) {
+            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
+          } else {
+            NewInstance(
+              classOf[GenericArrayData],
+              inputObject :: Nil,
+              dataType = ArrayType(dataType, nullable))
+          }
+
+        case t if t <:< localTypeOf[Map[_, _]] =>
+          val TypeRef(_, _, Seq(keyType, valueType)) = t
+          val Schema(keyDataType, _) = schemaFor(keyType)
+          val Schema(valueDataType, valueNullable) = schemaFor(valueType)
+
+          val rawMap = inputObject
+          val keys =
+            NewInstance(
+              classOf[GenericArrayData],
+              Invoke(rawMap, "keys", ObjectType(classOf[scala.collection.GenIterable[_]])) :: Nil,
+              dataType = ObjectType(classOf[ArrayData]))
+          val values =
+            NewInstance(
+              classOf[GenericArrayData],
+              Invoke(rawMap, "values", ObjectType(classOf[scala.collection.GenIterable[_]])) :: Nil,
+              dataType = ObjectType(classOf[ArrayData]))
+          NewInstance(
+            classOf[ArrayBasedMapData],
+            keys :: values :: Nil,
+            dataType = MapType(keyDataType, valueDataType, valueNullable))
+
+        case t if t <:< localTypeOf[String] =>
+          StaticInvoke(
+            classOf[UTF8String],
+            StringType,
+            "fromString",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.sql.Timestamp] =>
+          StaticInvoke(
+            DateTimeUtils,
+            TimestampType,
+            "fromJavaTimestamp",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.sql.Date] =>
+          StaticInvoke(
+            DateTimeUtils,
+            DateType,
+            "fromJavaDate",
+            inputObject :: Nil)
+        case t if t <:< localTypeOf[BigDecimal] =>
+          StaticInvoke(
+            Decimal,
+            DecimalType.SYSTEM_DEFAULT,
+            "apply",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.math.BigDecimal] =>
+          StaticInvoke(
+            Decimal,
+            DecimalType.SYSTEM_DEFAULT,
+            "apply",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.lang.Integer] =>
+          Invoke(inputObject, "intValue", IntegerType)
+        case t if t <:< localTypeOf[java.lang.Long] =>
+          Invoke(inputObject, "longValue", LongType)
+        case t if t <:< localTypeOf[java.lang.Double] =>
+          Invoke(inputObject, "doubleValue", DoubleType)
+        case t if t <:< localTypeOf[java.lang.Float] =>
+          Invoke(inputObject, "floatValue", FloatType)
+        case t if t <:< localTypeOf[java.lang.Short] =>
+          Invoke(inputObject, "shortValue", ShortType)
+        case t if t <:< localTypeOf[java.lang.Byte] =>
+          Invoke(inputObject, "byteValue", ByteType)
+        case t if t <:< localTypeOf[java.lang.Boolean] =>
+          Invoke(inputObject, "booleanValue", BooleanType)
+
+        case other =>
+          throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
+      }
+    }
+  }
+
   /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
   def schemaFor(tpe: `Type`): Schema = ScalaReflectionLock.synchronized {
     val className: String = tpe.erasure.typeSymbol.asClass.fullName
@@ -91,7 +328,6 @@ trait ScalaReflection {
       case t if t <:< localTypeOf[Option[_]] =>
         val TypeRef(_, _, Seq(optType)) = t
         Schema(schemaFor(optType).dataType, nullable = true)
-      // Need to decide if we actually need a special type here.
       case t if t <:< localTypeOf[Array[Byte]] => Schema(BinaryType, nullable = true)
       case t if t <:< localTypeOf[Array[_]] =>
         val TypeRef(_, _, Seq(elementType)) = t
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
new file mode 100644
index 000000000000..8dacfa9477ee
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.types.StructType
+
+/**
+ * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
+ *
+ * Encoders are not intended to be thread-safe and thus they are allow to avoid internal locking
+ * and reuse internal buffers to improve performance.
+ */
+trait Encoder[T] {
+  /** Returns the schema of encoding this type of object as a Row. */
+  def schema: StructType
+
+  /** A ClassTag that can be used to construct and Array to contain a collection of `T`. */
+  def clsTag: ClassTag[T]
+
+  /**
+   * Returns an encoded version of `t` as a Spark SQL row.  Note that multiple calls to
+   * toRow are allowed to return the same actual [[InternalRow]] object.  Thus, the caller should
+   * copy the result before making another call if required.
+   */
+  def toRow(t: T): InternalRow
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
new file mode 100644
index 000000000000..a23613673ebb
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
+
+import scala.reflect.ClassTag
+import scala.reflect.runtime.universe.{typeTag, TypeTag}
+
+import org.apache.spark.sql.catalyst.{ScalaReflection, InternalRow}
+import org.apache.spark.sql.types.{ObjectType, StructType}
+
+/**
+ * A factory for constructing encoders that convert Scala's product type to/from the Spark SQL
+ * internal binary representation.
+ */
+object ProductEncoder {
+  def apply[T <: Product : TypeTag]: Encoder[T] = {
+    // We convert the not-serializable TypeTag into StructType and ClassTag.
+    val schema = ScalaReflection.schemaFor[T].dataType.asInstanceOf[StructType]
+    val mirror = typeTag[T].mirror
+    val cls = mirror.runtimeClass(typeTag[T].tpe)
+
+    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
+    val extractExpressions = ScalaReflection.extractorsFor[T](inputObject)
+    new ClassEncoder[T](schema, extractExpressions, ClassTag[T](cls))
+  }
+}
+
+/**
+ * A generic encoder for JVM objects.
+ *
+ * @param schema The schema after converting `T` to a Spark SQL row.
+ * @param extractExpressions A set of expressions, one for each top-level field that can be used to
+ *                           extract the values from a raw object.
+ * @param clsTag A classtag for `T`.
+ */
+case class ClassEncoder[T](
+    schema: StructType,
+    extractExpressions: Seq[Expression],
+    clsTag: ClassTag[T])
+  extends Encoder[T] {
+
+  private val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
+  private val inputRow = new GenericMutableRow(1)
+
+  override def toRow(t: T): InternalRow = {
+    inputRow(0) = t
+    extractProjection(inputRow)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 2dd680454b4c..a0fe5bd77e3a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -177,6 +177,8 @@ class CodeGenContext {
     case _: MapType => "MapData"
     case dt: OpenHashSetUDT if dt.elementType == IntegerType => classOf[IntegerHashSet].getName
     case dt: OpenHashSetUDT if dt.elementType == LongType => classOf[LongHashSet].getName
+    case ObjectType(cls) if cls.isArray => s"${javaType(ObjectType(cls.getComponentType))}[]"
+    case ObjectType(cls) => cls.getName
     case _ => "Object"
   }
 
@@ -395,7 +397,7 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
 
     logDebug({
       // Only add extra debugging info to byte code when we are going to print the source code.
-      evaluator.setDebuggingInformation(false, true, false)
+      evaluator.setDebuggingInformation(true, true, false)
       withLineNums
     })
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
new file mode 100644
index 000000000000..e1f960a6e605
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -0,0 +1,334 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions
+
+import scala.language.existentials
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
+import org.apache.spark.sql.types._
+
+/**
+ * Invokes a static function, returning the result.  By default, any of the arguments being null
+ * will result in returning null instead of calling the function.
+ *
+ * @param staticObject The target of the static call.  This can either be the object itself
+ *                     (methods defined on scala objects), or the class object
+ *                     (static methods defined in java).
+ * @param dataType The expected return type of the function call
+ * @param functionName The name of the method to call.
+ * @param arguments An optional list of expressions to pass as arguments to the function.
+ * @param propagateNull When true, and any of the arguments is null, null will be returned instead
+ *                      of calling the function.
+ */
+case class StaticInvoke(
+    staticObject: Any,
+    dataType: DataType,
+    functionName: String,
+    arguments: Seq[Expression] = Nil,
+    propagateNull: Boolean = true) extends Expression {
+
+  val objectName = staticObject match {
+    case c: Class[_] => c.getName
+    case other => other.getClass.getName.stripSuffix("$")
+  }
+  override def nullable: Boolean = true
+  override def children: Seq[Expression] = Nil
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(dataType)
+    val argGen = arguments.map(_.gen(ctx))
+    val argString = argGen.map(_.value).mkString(", ")
+
+    if (propagateNull) {
+      val objNullCheck = if (ctx.defaultValue(dataType) == "null") {
+        s"${ev.isNull} = ${ev.value} == null;"
+      } else {
+        ""
+      }
+
+      val argsNonNull = s"!(${argGen.map(_.isNull).mkString(" || ")})"
+      s"""
+        ${argGen.map(_.code).mkString("\n")}
+
+        boolean ${ev.isNull} = true;
+        $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
+
+        if ($argsNonNull) {
+          ${ev.value} = $objectName.$functionName($argString);
+          $objNullCheck
+        }
+       """
+    } else {
+      s"""
+        ${argGen.map(_.code).mkString("\n")}
+
+        final boolean ${ev.isNull} = ${ev.value} == null;
+        $javaType ${ev.value} = $objectName.$functionName($argString);
+      """
+    }
+  }
+}
+
+/**
+ * Calls the specified function on an object, optionally passing arguments.  If the `targetObject`
+ * expression evaluates to null then null will be returned.
+ *
+ * @param targetObject An expression that will return the object to call the method on.
+ * @param functionName The name of the method to call.
+ * @param dataType The expected return type of the function.
+ * @param arguments An optional list of expressions, whos evaluation will be passed to the function.
+ */
+case class Invoke(
+    targetObject: Expression,
+    functionName: String,
+    dataType: DataType,
+    arguments: Seq[Expression] = Nil) extends Expression {
+
+  override def nullable: Boolean = true
+  override def children: Seq[Expression] = targetObject :: Nil
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(dataType)
+    val obj = targetObject.gen(ctx)
+    val argGen = arguments.map(_.gen(ctx))
+    val argString = argGen.map(_.value).mkString(", ")
+
+    // If the function can return null, we do an extra check to make sure our null bit is still set
+    // correctly.
+    val objNullCheck = if (ctx.defaultValue(dataType) == "null") {
+      s"${ev.isNull} = ${ev.value} == null;"
+    } else {
+      ""
+    }
+
+    s"""
+      ${obj.code}
+      ${argGen.map(_.code).mkString("\n")}
+
+      boolean ${ev.isNull} = ${obj.value} == null;
+      $javaType ${ev.value} =
+        ${ev.isNull} ?
+        ${ctx.defaultValue(dataType)} : ($javaType) ${obj.value}.$functionName($argString);
+      $objNullCheck
+    """
+  }
+}
+
+/**
+ * Constructs a new instance of the given class, using the result of evaluating the specified
+ * expressions as arguments.
+ *
+ * @param cls The class to construct.
+ * @param arguments A list of expression to use as arguments to the constructor.
+ * @param propagateNull When true, if any of the arguments is null, then null will be returned
+ *                      instead of trying to construct the object.
+ * @param dataType The type of object being constructed, as a Spark SQL datatype.  This allows you
+ *                 to manually specify the type when the object in question is a valid internal
+ *                 representation (i.e. ArrayData) instead of an object.
+ */
+case class NewInstance(
+    cls: Class[_],
+    arguments: Seq[Expression],
+    propagateNull: Boolean = true,
+    dataType: DataType) extends Expression {
+  private val className = cls.getName
+
+  override def nullable: Boolean = propagateNull
+
+  override def children: Seq[Expression] = arguments
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(dataType)
+    val argGen = arguments.map(_.gen(ctx))
+    val argString = argGen.map(_.value).mkString(", ")
+
+    if (propagateNull) {
+      val objNullCheck = if (ctx.defaultValue(dataType) == "null") {
+        s"${ev.isNull} = ${ev.value} == null;"
+      } else {
+        ""
+      }
+
+      val argsNonNull = s"!(${argGen.map(_.isNull).mkString(" || ")})"
+      s"""
+        ${argGen.map(_.code).mkString("\n")}
+
+        boolean ${ev.isNull} = true;
+        $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
+
+        if ($argsNonNull) {
+          ${ev.value} = new $className($argString);
+          ${ev.isNull} = false;
+        }
+       """
+    } else {
+      s"""
+        ${argGen.map(_.code).mkString("\n")}
+
+        final boolean ${ev.isNull} = ${ev.value} == null;
+        $javaType ${ev.value} = new $className($argString);
+      """
+    }
+  }
+}
+
+/**
+ * Given an expression that returns on object of type `Option[_]`, this expression unwraps the
+ * option into the specified Spark SQL datatype.  In the case of `None`, the nullbit is set instead.
+ *
+ * @param dataType The expected unwrapped option type.
+ * @param child An expression that returns an `Option`
+ */
+case class UnwrapOption(
+    dataType: DataType,
+    child: Expression) extends UnaryExpression with ExpectsInputTypes {
+
+  override def nullable: Boolean = true
+
+  override def children: Seq[Expression] = Nil
+
+  override def inputTypes: Seq[AbstractDataType] = ObjectType :: Nil
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(dataType)
+    val inputObject = child.gen(ctx)
+
+    s"""
+      ${inputObject.code}
+
+      boolean ${ev.isNull} = ${inputObject.value} == null || ${inputObject.value}.isEmpty();
+      $javaType ${ev.value} =
+        ${ev.isNull} ? ${ctx.defaultValue(dataType)} : ($javaType)${inputObject.value}.get();
+    """
+  }
+}
+
+case class LambdaVariable(value: String, isNull: String, dataType: DataType) extends Expression {
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
+    throw new UnsupportedOperationException("Only calling gen() is supported.")
+
+  override def children: Seq[Expression] = Nil
+  override def gen(ctx: CodeGenContext): GeneratedExpressionCode =
+    GeneratedExpressionCode(code = "", value = value, isNull = isNull)
+
+  override def nullable: Boolean = false
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
+
+}
+
+/**
+ * Applies the given expression to every element of a collection of items, returning the result
+ * as an ArrayType.  This is similar to a typical map operation, but where the lambda function
+ * is expressed using catalyst expressions.
+ *
+ * The following collection ObjectTypes are currently supported: Seq, Array
+ *
+ * @param function A function that returns an expression, given an attribute that can be used
+ *                 to access the current value.  This is does as a lambda function so that
+ *                 a unique attribute reference can be provided for each expression (thus allowing
+ *                 us to nest multiple MapObject calls).
+ * @param inputData An expression that when evaluted returns a collection object.
+ * @param elementType The type of element in the collection, expressed as a DataType.
+ */
+case class MapObjects(
+    function: AttributeReference => Expression,
+    inputData: Expression,
+    elementType: DataType) extends Expression {
+
+  private val loopAttribute = AttributeReference("loopVar", elementType)()
+  private val completeFunction = function(loopAttribute)
+
+  private val (lengthFunction, itemAccessor) = inputData.dataType match {
+    case ObjectType(cls) if cls.isAssignableFrom(classOf[Seq[_]]) =>
+      (".size()", (i: String) => s".apply($i)")
+    case ObjectType(cls) if cls.isArray =>
+      (".length", (i: String) => s"[$i]")
+  }
+
+  override def nullable: Boolean = true
+
+  override def children: Seq[Expression] = completeFunction :: inputData :: Nil
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override def dataType: DataType = ArrayType(completeFunction.dataType)
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(dataType)
+    val elementJavaType = ctx.javaType(elementType)
+    val genInputData = inputData.gen(ctx)
+
+    // Variables to hold the element that is currently being processed.
+    val loopValue = ctx.freshName("loopValue")
+    val loopIsNull = ctx.freshName("loopIsNull")
+
+    val loopVariable = LambdaVariable(loopValue, loopIsNull, elementType)
+    val boundFunction = completeFunction transform {
+      case a: AttributeReference if a == loopAttribute => loopVariable
+    }
+
+    val genFunction = boundFunction.gen(ctx)
+    val dataLength = ctx.freshName("dataLength")
+    val convertedArray = ctx.freshName("convertedArray")
+    val loopIndex = ctx.freshName("loopIndex")
+
+    s"""
+      ${genInputData.code}
+
+      boolean ${ev.isNull} = ${genInputData.value} == null;
+      $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
+
+      if (!${ev.isNull}) {
+        Object[] $convertedArray = null;
+        int $dataLength = ${genInputData.value}$lengthFunction;
+        $convertedArray = new Object[$dataLength];
+
+        int $loopIndex = 0;
+        while ($loopIndex < $dataLength) {
+          $elementJavaType $loopValue =
+            ($elementJavaType)${genInputData.value}${itemAccessor(loopIndex)};
+          boolean $loopIsNull = $loopValue == null;
+
+          ${genFunction.code}
+
+          $convertedArray[$loopIndex] = ${genFunction.value};
+          $loopIndex += 1;
+        }
+
+        ${ev.isNull} = false;
+        ${ev.value} = new ${classOf[GenericArrayData].getName}($convertedArray);
+      }
+    """
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
index 459fcb6fc0ac..c3816033275d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
@@ -22,6 +22,15 @@ import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
 class GenericArrayData(private[sql] val array: Array[Any]) extends ArrayData {
 
+  def this(seq: scala.collection.GenIterable[Any]) = this(seq.toArray)
+
+  // TODO: This is boxing.  We should specialize.
+  def this(primitiveArray: Array[Int]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Long]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Float]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Double]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Boolean]) = this(primitiveArray.toSeq)
+
   override def copy(): ArrayData = new GenericArrayData(array.clone())
 
   override def numElements(): Int = array.length
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ObjectType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ObjectType.scala
new file mode 100644
index 000000000000..fca0b799eb80
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ObjectType.scala
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.types
+
+import scala.language.existentials
+
+private[sql] object ObjectType extends AbstractDataType {
+  override private[sql] def defaultConcreteType: DataType =
+    throw new UnsupportedOperationException("null literals can't be casted to ObjectType")
+
+  // No casting or comparison is supported.
+  override private[sql] def acceptsType(other: DataType): Boolean = false
+
+  override private[sql] def simpleString: String = "Object"
+}
+
+/**
+ * Represents a JVM object that is passing through Spark SQL expression evaluation.  Note this
+ * is only used internally while converting into the internal format and is not intended for use
+ * outside of the execution engine.
+ */
+private[sql] case class ObjectType(cls: Class[_]) extends DataType {
+  override def defaultSize: Int =
+    throw new UnsupportedOperationException("No size estimation available for objects.")
+
+  def asNullable: DataType = this
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
new file mode 100644
index 000000000000..99c993d3febc
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -0,0 +1,174 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import java.sql.{Date, Timestamp}
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.ScalaReflection._
+import org.apache.spark.sql.catalyst.expressions.UnsafeProjection
+import org.apache.spark.sql.catalyst._
+
+
+case class RepeatedStruct(s: Seq[PrimitiveData])
+
+case class NestedArray(a: Array[Array[Int]])
+
+class ProductEncoderSuite extends SparkFunSuite {
+
+  test("convert PrimitiveData to InternalRow") {
+    val inputData = PrimitiveData(1, 1, 1, 1, 1, 1, true)
+    val encoder = ProductEncoder[PrimitiveData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(convertedData.getInt(0) == 1)
+    assert(convertedData.getLong(1) == 1.toLong)
+    assert(convertedData.getDouble(2) == 1.toDouble)
+    assert(convertedData.getFloat(3) == 1.toFloat)
+    assert(convertedData.getShort(4) == 1.toShort)
+    assert(convertedData.getByte(5) == 1.toByte)
+    assert(convertedData.getBoolean(6) == true)
+  }
+
+  test("convert Some[_] to InternalRow") {
+    val primitiveData = PrimitiveData(1, 1, 1, 1, 1, 1, true)
+    val inputData = OptionalData(Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
+      Some(primitiveData))
+
+    val encoder = ProductEncoder[OptionalData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(convertedData.getInt(0) == 2)
+    assert(convertedData.getLong(1) == 2.toLong)
+    assert(convertedData.getDouble(2) == 2.toDouble)
+    assert(convertedData.getFloat(3) == 2.toFloat)
+    assert(convertedData.getShort(4) == 2.toShort)
+    assert(convertedData.getByte(5) == 2.toByte)
+    assert(convertedData.getBoolean(6) == true)
+
+    val nestedRow = convertedData.getStruct(7, 7)
+    assert(nestedRow.getInt(0) == 1)
+    assert(nestedRow.getLong(1) == 1.toLong)
+    assert(nestedRow.getDouble(2) == 1.toDouble)
+    assert(nestedRow.getFloat(3) == 1.toFloat)
+    assert(nestedRow.getShort(4) == 1.toShort)
+    assert(nestedRow.getByte(5) == 1.toByte)
+    assert(nestedRow.getBoolean(6) == true)
+  }
+
+  test("convert None to InternalRow") {
+    val inputData = OptionalData(None, None, None, None, None, None, None, None)
+    val encoder = ProductEncoder[OptionalData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(convertedData.isNullAt(0))
+    assert(convertedData.isNullAt(1))
+    assert(convertedData.isNullAt(2))
+    assert(convertedData.isNullAt(3))
+    assert(convertedData.isNullAt(4))
+    assert(convertedData.isNullAt(5))
+    assert(convertedData.isNullAt(6))
+    assert(convertedData.isNullAt(7))
+  }
+
+  test("convert nullable but present data to InternalRow") {
+    val inputData = NullableData(
+      1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true, "test", new java.math.BigDecimal(1), new Date(0),
+      new Timestamp(0), Array[Byte](1, 2, 3))
+
+    val encoder = ProductEncoder[NullableData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(convertedData.getInt(0) == 1)
+    assert(convertedData.getLong(1) == 1.toLong)
+    assert(convertedData.getDouble(2) == 1.toDouble)
+    assert(convertedData.getFloat(3) == 1.toFloat)
+    assert(convertedData.getShort(4) == 1.toShort)
+    assert(convertedData.getByte(5) == 1.toByte)
+    assert(convertedData.getBoolean(6) == true)
+  }
+
+  test("convert nullable data to InternalRow") {
+    val inputData =
+      NullableData(null, null, null, null, null, null, null, null, null, null, null, null)
+
+    val encoder = ProductEncoder[NullableData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(convertedData.isNullAt(0))
+    assert(convertedData.isNullAt(1))
+    assert(convertedData.isNullAt(2))
+    assert(convertedData.isNullAt(3))
+    assert(convertedData.isNullAt(4))
+    assert(convertedData.isNullAt(5))
+    assert(convertedData.isNullAt(6))
+    assert(convertedData.isNullAt(7))
+    assert(convertedData.isNullAt(8))
+    assert(convertedData.isNullAt(9))
+    assert(convertedData.isNullAt(10))
+    assert(convertedData.isNullAt(11))
+  }
+
+  test("convert repeated struct") {
+    val inputData = RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil)
+    val encoder = ProductEncoder[RepeatedStruct]
+
+    val converted = encoder.toRow(inputData)
+    val convertedStruct = converted.getArray(0).getStruct(0, 7)
+    assert(convertedStruct.getInt(0) == 1)
+    assert(convertedStruct.getLong(1) == 1.toLong)
+    assert(convertedStruct.getDouble(2) == 1.toDouble)
+    assert(convertedStruct.getFloat(3) == 1.toFloat)
+    assert(convertedStruct.getShort(4) == 1.toShort)
+    assert(convertedStruct.getByte(5) == 1.toByte)
+    assert(convertedStruct.getBoolean(6) == true)
+  }
+
+  test("convert nested seq") {
+    val convertedData = ProductEncoder[Tuple1[Seq[Seq[Int]]]].toRow(Tuple1(Seq(Seq(1))))
+    assert(convertedData.getArray(0).getArray(0).getInt(0) == 1)
+
+    val convertedData2 = ProductEncoder[Tuple1[Seq[Seq[Seq[Int]]]]].toRow(Tuple1(Seq(Seq(Seq(1)))))
+    assert(convertedData2.getArray(0).getArray(0).getArray(0).getInt(0) == 1)
+  }
+
+  test("convert nested array") {
+    val convertedData = ProductEncoder[Tuple1[Array[Array[Int]]]].toRow(Tuple1(Array(Array(1))))
+  }
+
+  test("convert complex") {
+    val inputData = ComplexData(
+      Seq(1, 2),
+      Array(1, 2),
+      1 :: 2 :: Nil,
+      Seq(new Integer(1), null, new Integer(2)),
+      Map(1 -> 2L),
+      Map(1 -> new java.lang.Long(2)),
+      PrimitiveData(1, 1, 1, 1, 1, 1, true),
+      Array(Array(1)))
+
+    val encoder = ProductEncoder[ComplexData]
+    val convertedData = encoder.toRow(inputData)
+
+    assert(!convertedData.isNullAt(0))
+    val seq = convertedData.getArray(0)
+    assert(seq.numElements() == 2)
+    assert(seq.getInt(0) == 1)
+    assert(seq.getInt(1) == 2)
+  }
+}

From 2816c89b6a304cb0b5214e14ebbc320158e88260 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Thu, 8 Oct 2015 14:53:21 -0700
Subject: [PATCH 188/896] [SPARK-10988] [SQL] Reduce duplication in
 Aggregate2's expression rewriting logic

In `aggregate/utils.scala`, there is a substantial amount of duplication in the expression-rewriting logic. As a prerequisite to supporting imperative aggregate functions in `TungstenAggregate`, this patch refactors this file so that the same expression-rewriting logic is used for both `SortAggregate` and `TungstenAggregate`.

In order to allow both operators to use the same rewriting logic, `TungstenAggregationIterator. generateResultProjection()` has been updated so that it first evaluates all declarative aggregate functions' `evaluateExpression`s and writes the results into a temporary buffer, and then uses this temporary buffer and the grouping expressions to evaluate the final resultExpressions. This matches the logic in SortAggregateIterator, where this two-pass approach is necessary in order to support imperative aggregates. If this change turns out to cause performance regressions, then we can look into re-implementing the single-pass evaluation in a cleaner way as part of a followup patch.

Since the rewriting logic is now shared across both operators, this patch also extracts that logic and places it in `SparkStrategies`. This makes the rewriting logic a bit easier to follow, I think.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9015 from JoshRosen/SPARK-10988.
---
 .../spark/sql/execution/SparkStrategies.scala |  67 +++--
 .../aggregate/TungstenAggregate.scala         |   4 +
 .../TungstenAggregationIterator.scala         |  22 +-
 .../spark/sql/execution/aggregate/utils.scala | 244 +++++-------------
 .../TungstenAggregationIteratorSuite.scala    |   2 +-
 5 files changed, 143 insertions(+), 196 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index d1bbf2e20fcf..79bd1a41808d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -195,19 +195,22 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         converted match {
           case None => Nil // Cannot convert to new aggregation code path.
           case Some(logical.Aggregate(groupingExpressions, resultExpressions, child)) =>
-            // Extracts all distinct aggregate expressions from the resultExpressions.
+            // A single aggregate expression might appear multiple times in resultExpressions.
+            // In order to avoid evaluating an individual aggregate function multiple times, we'll
+            // build a set of the distinct aggregate expressions and build a function which can
+            // be used to re-write expressions so that they reference the single copy of the
+            // aggregate function which actually gets computed.
             val aggregateExpressions = resultExpressions.flatMap { expr =>
               expr.collect {
                 case agg: AggregateExpression2 => agg
               }
-            }.toSet.toSeq
+            }.distinct
             // For those distinct aggregate expressions, we create a map from the
             // aggregate function to the corresponding attribute of the function.
-            val aggregateFunctionMap = aggregateExpressions.map { agg =>
+            val aggregateFunctionToAttribute = aggregateExpressions.map { agg =>
               val aggregateFunction = agg.aggregateFunction
-              val attribtue = Alias(aggregateFunction, aggregateFunction.toString)().toAttribute
-              (aggregateFunction, agg.isDistinct) ->
-                (aggregateFunction -> attribtue)
+              val attribute = Alias(aggregateFunction, aggregateFunction.toString)().toAttribute
+              (aggregateFunction, agg.isDistinct) -> attribute
             }.toMap
 
             val (functionsWithDistinct, functionsWithoutDistinct) =
@@ -220,6 +223,40 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
                   "code path.")
             }
 
+            val namedGroupingExpressions = groupingExpressions.map {
+              case ne: NamedExpression => ne -> ne
+              // If the expression is not a NamedExpressions, we add an alias.
+              // So, when we generate the result of the operator, the Aggregate Operator
+              // can directly get the Seq of attributes representing the grouping expressions.
+              case other =>
+                val withAlias = Alias(other, other.toString)()
+                other -> withAlias
+            }
+            val groupExpressionMap = namedGroupingExpressions.toMap
+
+            // The original `resultExpressions` are a set of expressions which may reference
+            // aggregate expressions, grouping column values, and constants. When aggregate operator
+            // emits output rows, we will use `resultExpressions` to generate an output projection
+            // which takes the grouping columns and final aggregate result buffer as input.
+            // Thus, we must re-write the result expressions so that their attributes match up with
+            // the attributes of the final result projection's input row:
+            val rewrittenResultExpressions = resultExpressions.map { expr =>
+              expr.transformDown {
+                case AggregateExpression2(aggregateFunction, _, isDistinct) =>
+                  // The final aggregation buffer's attributes will be `finalAggregationAttributes`,
+                  // so replace each aggregate expression by its corresponding attribute in the set:
+                  aggregateFunctionToAttribute(aggregateFunction, isDistinct)
+                case expression =>
+                  // Since we're using `namedGroupingAttributes` to extract the grouping key
+                  // columns, we need to replace grouping key expressions with their corresponding
+                  // attributes. We do not rely on the equality check at here since attributes may
+                  // differ cosmetically. Instead, we use semanticEquals.
+                  groupExpressionMap.collectFirst {
+                    case (expr, ne) if expr semanticEquals expression => ne.toAttribute
+                  }.getOrElse(expression)
+              }.asInstanceOf[NamedExpression]
+            }
+
             val aggregateOperator =
               if (aggregateExpressions.map(_.aggregateFunction).exists(!_.supportsPartial)) {
                 if (functionsWithDistinct.nonEmpty) {
@@ -227,26 +264,26 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
                     "aggregate functions which don't support partial aggregation.")
                 } else {
                   aggregate.Utils.planAggregateWithoutPartial(
-                    groupingExpressions,
+                    namedGroupingExpressions.map(_._2),
                     aggregateExpressions,
-                    aggregateFunctionMap,
-                    resultExpressions,
+                    aggregateFunctionToAttribute,
+                    rewrittenResultExpressions,
                     planLater(child))
                 }
               } else if (functionsWithDistinct.isEmpty) {
                 aggregate.Utils.planAggregateWithoutDistinct(
-                  groupingExpressions,
+                  namedGroupingExpressions.map(_._2),
                   aggregateExpressions,
-                  aggregateFunctionMap,
-                  resultExpressions,
+                  aggregateFunctionToAttribute,
+                  rewrittenResultExpressions,
                   planLater(child))
               } else {
                 aggregate.Utils.planAggregateWithOneDistinct(
-                  groupingExpressions,
+                  namedGroupingExpressions.map(_._2),
                   functionsWithDistinct,
                   functionsWithoutDistinct,
-                  aggregateFunctionMap,
-                  resultExpressions,
+                  aggregateFunctionToAttribute,
+                  rewrittenResultExpressions,
                   planLater(child))
               }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index 3cd22af30592..7b3d072b2e06 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -31,7 +31,9 @@ case class TungstenAggregate(
     requiredChildDistributionExpressions: Option[Seq[Expression]],
     groupingExpressions: Seq[NamedExpression],
     nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateAttributes: Seq[Attribute],
     completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateAttributes: Seq[Attribute],
     resultExpressions: Seq[NamedExpression],
     child: SparkPlan)
   extends UnaryNode {
@@ -77,7 +79,9 @@ case class TungstenAggregate(
       new TungstenAggregationIterator(
         groupingExpressions,
         nonCompleteAggregateExpressions,
+        nonCompleteAggregateAttributes,
         completeAggregateExpressions,
+        completeAggregateAttributes,
         resultExpressions,
         newMutableProjection,
         child.output,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index a6f4c1d92f6d..4bb95c9eb7f3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -60,8 +60,12 @@ import org.apache.spark.sql.types.StructType
  * @param nonCompleteAggregateExpressions
  *   [[AggregateExpression2]] containing [[AggregateFunction2]]s with mode [[Partial]],
  *   [[PartialMerge]], or [[Final]].
+ * @param nonCompleteAggregateAttributes the attributes of the nonCompleteAggregateExpressions'
+ *   outputs when they are stored in the final aggregation buffer.
  * @param completeAggregateExpressions
  *   [[AggregateExpression2]] containing [[AggregateFunction2]]s with mode [[Complete]].
+ * @param completeAggregateAttributes the attributes of completeAggregateExpressions' outputs
+ *   when they are stored in the final aggregation buffer.
  * @param resultExpressions
  *   expressions for generating output rows.
  * @param newMutableProjection
@@ -72,7 +76,9 @@ import org.apache.spark.sql.types.StructType
 class TungstenAggregationIterator(
     groupingExpressions: Seq[NamedExpression],
     nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateAttributes: Seq[Attribute],
     completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateAttributes: Seq[Attribute],
     resultExpressions: Seq[NamedExpression],
     newMutableProjection: (Seq[Expression], Seq[Attribute]) => (() => MutableProjection),
     originalInputAttributes: Seq[Attribute],
@@ -280,17 +286,25 @@ class TungstenAggregationIterator(
       // resultExpressions.
       case (Some(Final), None) | (Some(Final) | None, Some(Complete)) =>
         val joinedRow = new JoinedRow()
+        val evalExpressions = allAggregateFunctions.map {
+          case ae: DeclarativeAggregate => ae.evaluateExpression
+          // case agg: AggregateFunction2 => Literal.create(null, agg.dataType)
+        }
+        val expressionAggEvalProjection = UnsafeProjection.create(evalExpressions, bufferAttributes)
+        // These are the attributes of the row produced by `expressionAggEvalProjection`
+        val aggregateResultSchema = nonCompleteAggregateAttributes ++ completeAggregateAttributes
         val resultProjection =
-          UnsafeProjection.create(resultExpressions, groupingAttributes ++ bufferAttributes)
+          UnsafeProjection.create(resultExpressions, groupingAttributes ++ aggregateResultSchema)
 
         (currentGroupingKey: UnsafeRow, currentBuffer: UnsafeRow) => {
-          resultProjection(joinedRow(currentGroupingKey, currentBuffer))
+          // Generate results for all expression-based aggregate functions.
+          val aggregateResult = expressionAggEvalProjection.apply(currentBuffer)
+          resultProjection(joinedRow(currentGroupingKey, aggregateResult))
         }
 
       // Grouping-only: a output row is generated from values of grouping expressions.
       case (None, None) =>
-        val resultProjection =
-          UnsafeProjection.create(resultExpressions, groupingAttributes)
+        val resultProjection = UnsafeProjection.create(resultExpressions, groupingAttributes)
 
         (currentGroupingKey: UnsafeRow, currentBuffer: UnsafeRow) => {
           resultProjection(currentGroupingKey)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index e1c2d9475a10..cf6e7ed0d337 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.execution.aggregate
 
-import scala.collection.mutable
-
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.execution.{UnsafeFixedWidthAggregationMap, SparkPlan}
@@ -38,60 +36,35 @@ object Utils {
   }
 
   def planAggregateWithoutPartial(
-      groupingExpressions: Seq[Expression],
+      groupingExpressions: Seq[NamedExpression],
       aggregateExpressions: Seq[AggregateExpression2],
-      aggregateFunctionMap: Map[(AggregateFunction2, Boolean), (AggregateFunction2, Attribute)],
+      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
 
-    val namedGroupingExpressions = groupingExpressions.map {
-      case ne: NamedExpression => ne -> ne
-      // If the expression is not a NamedExpressions, we add an alias.
-      // So, when we generate the result of the operator, the Aggregate Operator
-      // can directly get the Seq of attributes representing the grouping expressions.
-      case other =>
-        val withAlias = Alias(other, other.toString)()
-        other -> withAlias
-    }
-    val groupExpressionMap = namedGroupingExpressions.toMap
-    val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
-
+    val groupingAttributes = groupingExpressions.map(_.toAttribute)
     val completeAggregateExpressions = aggregateExpressions.map(_.copy(mode = Complete))
-    val completeAggregateAttributes =
-      completeAggregateExpressions.map {
-        expr => aggregateFunctionMap(expr.aggregateFunction, expr.isDistinct)._2
-      }
-
-    val rewrittenResultExpressions = resultExpressions.map { expr =>
-      expr.transformDown {
-        case agg: AggregateExpression2 =>
-          aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._2
-        case expression =>
-          // We do not rely on the equality check at here since attributes may
-          // different cosmetically. Instead, we use semanticEquals.
-          groupExpressionMap.collectFirst {
-            case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-          }.getOrElse(expression)
-      }.asInstanceOf[NamedExpression]
+    val completeAggregateAttributes = completeAggregateExpressions.map {
+      expr => aggregateFunctionToAttribute(expr.aggregateFunction, expr.isDistinct)
     }
 
     SortBasedAggregate(
-      requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-      groupingExpressions = namedGroupingExpressions.map(_._2),
+      requiredChildDistributionExpressions = Some(groupingAttributes),
+      groupingExpressions = groupingAttributes,
       nonCompleteAggregateExpressions = Nil,
       nonCompleteAggregateAttributes = Nil,
       completeAggregateExpressions = completeAggregateExpressions,
       completeAggregateAttributes = completeAggregateAttributes,
       initialInputBufferOffset = 0,
-      resultExpressions = rewrittenResultExpressions,
+      resultExpressions = resultExpressions,
       child = child
     ) :: Nil
   }
 
   def planAggregateWithoutDistinct(
-      groupingExpressions: Seq[Expression],
+      groupingExpressions: Seq[NamedExpression],
       aggregateExpressions: Seq[AggregateExpression2],
-      aggregateFunctionMap: Map[(AggregateFunction2, Boolean), (AggregateFunction2, Attribute)],
+      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
     // Check if we can use TungstenAggregate.
@@ -104,36 +77,29 @@ object Utils {
 
 
     // 1. Create an Aggregate Operator for partial aggregations.
-    val namedGroupingExpressions = groupingExpressions.map {
-      case ne: NamedExpression => ne -> ne
-      // If the expression is not a NamedExpressions, we add an alias.
-      // So, when we generate the result of the operator, the Aggregate Operator
-      // can directly get the Seq of attributes representing the grouping expressions.
-      case other =>
-        val withAlias = Alias(other, other.toString)()
-        other -> withAlias
-    }
-    val groupExpressionMap = namedGroupingExpressions.toMap
-    val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
+
+    val groupingAttributes = groupingExpressions.map(_.toAttribute)
     val partialAggregateExpressions = aggregateExpressions.map(_.copy(mode = Partial))
     val partialAggregateAttributes =
       partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialResultExpressions =
-      namedGroupingAttributes ++
+      groupingAttributes ++
         partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
 
     val partialAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
         requiredChildDistributionExpressions = None: Option[Seq[Expression]],
-        groupingExpressions = namedGroupingExpressions.map(_._2),
+        groupingExpressions = groupingExpressions,
         nonCompleteAggregateExpressions = partialAggregateExpressions,
+        nonCompleteAggregateAttributes = partialAggregateAttributes,
         completeAggregateExpressions = Nil,
+        completeAggregateAttributes = Nil,
         resultExpressions = partialResultExpressions,
         child = child)
     } else {
       SortBasedAggregate(
         requiredChildDistributionExpressions = None: Option[Seq[Expression]],
-        groupingExpressions = namedGroupingExpressions.map(_._2),
+        groupingExpressions = groupingExpressions,
         nonCompleteAggregateExpressions = partialAggregateExpressions,
         nonCompleteAggregateAttributes = partialAggregateAttributes,
         completeAggregateExpressions = Nil,
@@ -145,58 +111,32 @@ object Utils {
 
     // 2. Create an Aggregate Operator for final aggregations.
     val finalAggregateExpressions = aggregateExpressions.map(_.copy(mode = Final))
-    val finalAggregateAttributes =
-      finalAggregateExpressions.map {
-        expr => aggregateFunctionMap(expr.aggregateFunction, expr.isDistinct)._2
-      }
+    // The attributes of the final aggregation buffer, which is presented as input to the result
+    // projection:
+    val finalAggregateAttributes = finalAggregateExpressions.map {
+      expr => aggregateFunctionToAttribute(expr.aggregateFunction, expr.isDistinct)
+    }
 
     val finalAggregate = if (usesTungstenAggregate) {
-      val rewrittenResultExpressions = resultExpressions.map { expr =>
-        expr.transformDown {
-          case agg: AggregateExpression2 =>
-            // aggregateFunctionMap contains unique aggregate functions.
-            val aggregateFunction =
-              aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._1
-            aggregateFunction.asInstanceOf[DeclarativeAggregate].evaluateExpression
-          case expression =>
-            // We do not rely on the equality check at here since attributes may
-            // different cosmetically. Instead, we use semanticEquals.
-            groupExpressionMap.collectFirst {
-              case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-            }.getOrElse(expression)
-        }.asInstanceOf[NamedExpression]
-      }
-
       TungstenAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
+        nonCompleteAggregateAttributes = finalAggregateAttributes,
         completeAggregateExpressions = Nil,
-        resultExpressions = rewrittenResultExpressions,
+        completeAggregateAttributes = Nil,
+        resultExpressions = resultExpressions,
         child = partialAggregate)
     } else {
-      val rewrittenResultExpressions = resultExpressions.map { expr =>
-        expr.transformDown {
-          case agg: AggregateExpression2 =>
-            aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._2
-          case expression =>
-            // We do not rely on the equality check at here since attributes may
-            // different cosmetically. Instead, we use semanticEquals.
-            groupExpressionMap.collectFirst {
-              case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-            }.getOrElse(expression)
-        }.asInstanceOf[NamedExpression]
-      }
-
       SortBasedAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
         nonCompleteAggregateAttributes = finalAggregateAttributes,
         completeAggregateExpressions = Nil,
         completeAggregateAttributes = Nil,
-        initialInputBufferOffset = namedGroupingAttributes.length,
-        resultExpressions = rewrittenResultExpressions,
+        initialInputBufferOffset = groupingExpressions.length,
+        resultExpressions = resultExpressions,
         child = partialAggregate)
     }
 
@@ -204,10 +144,10 @@ object Utils {
   }
 
   def planAggregateWithOneDistinct(
-      groupingExpressions: Seq[Expression],
+      groupingExpressions: Seq[NamedExpression],
       functionsWithDistinct: Seq[AggregateExpression2],
       functionsWithoutDistinct: Seq[AggregateExpression2],
-      aggregateFunctionMap: Map[(AggregateFunction2, Boolean), (AggregateFunction2, Attribute)],
+      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
 
@@ -221,20 +161,7 @@ object Utils {
           aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
     // 1. Create an Aggregate Operator for partial aggregations.
-    // The grouping expressions are original groupingExpressions and
-    // distinct columns. For example, for avg(distinct value) ... group by key
-    // the grouping expressions of this Aggregate Operator will be [key, value].
-    val namedGroupingExpressions = groupingExpressions.map {
-      case ne: NamedExpression => ne -> ne
-      // If the expression is not a NamedExpressions, we add an alias.
-      // So, when we generate the result of the operator, the Aggregate Operator
-      // can directly get the Seq of attributes representing the grouping expressions.
-      case other =>
-        val withAlias = Alias(other, other.toString)()
-        other -> withAlias
-    }
-    val groupExpressionMap = namedGroupingExpressions.toMap
-    val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
+    val groupingAttributes = groupingExpressions.map(_.toAttribute)
 
     // It is safe to call head at here since functionsWithDistinct has at least one
     // AggregateExpression2.
@@ -253,22 +180,27 @@ object Utils {
     val partialAggregateAttributes =
       partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialAggregateGroupingExpressions =
-      (namedGroupingExpressions ++ namedDistinctColumnExpressions).map(_._2)
+      groupingExpressions ++ namedDistinctColumnExpressions.map(_._2)
     val partialAggregateResult =
-      namedGroupingAttributes ++
+        groupingAttributes ++
         distinctColumnAttributes ++
         partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
     val partialAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
-        requiredChildDistributionExpressions = None: Option[Seq[Expression]],
+        requiredChildDistributionExpressions = None,
+        // The grouping expressions are original groupingExpressions and
+        // distinct columns. For example, for avg(distinct value) ... group by key
+        // the grouping expressions of this Aggregate Operator will be [key, value].
         groupingExpressions = partialAggregateGroupingExpressions,
         nonCompleteAggregateExpressions = partialAggregateExpressions,
+        nonCompleteAggregateAttributes = partialAggregateAttributes,
         completeAggregateExpressions = Nil,
+        completeAggregateAttributes = Nil,
         resultExpressions = partialAggregateResult,
         child = child)
     } else {
       SortBasedAggregate(
-        requiredChildDistributionExpressions = None: Option[Seq[Expression]],
+        requiredChildDistributionExpressions = None,
         groupingExpressions = partialAggregateGroupingExpressions,
         nonCompleteAggregateExpressions = partialAggregateExpressions,
         nonCompleteAggregateAttributes = partialAggregateAttributes,
@@ -284,41 +216,40 @@ object Utils {
     val partialMergeAggregateAttributes =
       partialMergeAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
     val partialMergeAggregateResult =
-      namedGroupingAttributes ++
+        groupingAttributes ++
         distinctColumnAttributes ++
         partialMergeAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
     val partialMergeAggregate = if (usesTungstenAggregate) {
       TungstenAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes ++ distinctColumnAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes ++ distinctColumnAttributes,
         nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
+        nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
         completeAggregateExpressions = Nil,
+        completeAggregateAttributes = Nil,
         resultExpressions = partialMergeAggregateResult,
         child = partialAggregate)
     } else {
       SortBasedAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes ++ distinctColumnAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes ++ distinctColumnAttributes,
         nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
         nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
         completeAggregateExpressions = Nil,
         completeAggregateAttributes = Nil,
-        initialInputBufferOffset = (namedGroupingAttributes ++ distinctColumnAttributes).length,
+        initialInputBufferOffset = (groupingAttributes ++ distinctColumnAttributes).length,
         resultExpressions = partialMergeAggregateResult,
         child = partialAggregate)
     }
 
     // 3. Create an Aggregate Operator for partial merge aggregations.
     val finalAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Final))
-    val finalAggregateAttributes =
-      finalAggregateExpressions.map {
-        expr => aggregateFunctionMap(expr.aggregateFunction, expr.isDistinct)._2
-      }
-    // Create a map to store those rewritten aggregate functions. We always need to use
-    // both function and its corresponding isDistinct flag as the key because function itself
-    // does not knows if it is has distinct keyword or now.
-    val rewrittenAggregateFunctions =
-      mutable.Map.empty[(AggregateFunction2, Boolean), AggregateFunction2]
+    // The attributes of the final aggregation buffer, which is presented as input to the result
+    // projection:
+    val finalAggregateAttributes = finalAggregateExpressions.map {
+      expr => aggregateFunctionToAttribute(expr.aggregateFunction, expr.isDistinct)
+    }
+
     val (completeAggregateExpressions, completeAggregateAttributes) = functionsWithDistinct.map {
       // Children of an AggregateFunction with DISTINCT keyword has already
       // been evaluated. At here, we need to replace original children
@@ -328,9 +259,6 @@ object Utils {
           case expr if distinctColumnExpressionMap.contains(expr) =>
             distinctColumnExpressionMap(expr).toAttribute
         }.asInstanceOf[AggregateFunction2]
-        // Because we have rewritten the aggregate function, we use rewrittenAggregateFunctions
-        // to track the old version and the new version of this function.
-        rewrittenAggregateFunctions += (aggregateFunction, true) -> rewrittenAggregateFunction
         // We rewrite the aggregate function to a non-distinct aggregation because
         // its input will have distinct arguments.
         // We just keep the isDistinct setting to true, so when users look at the query plan,
@@ -338,66 +266,30 @@ object Utils {
         val rewrittenAggregateExpression =
           AggregateExpression2(rewrittenAggregateFunction, Complete, true)
 
-        val aggregateFunctionAttribute =
-          aggregateFunctionMap(agg.aggregateFunction, true)._2
-        (rewrittenAggregateExpression -> aggregateFunctionAttribute)
+        val aggregateFunctionAttribute = aggregateFunctionToAttribute(agg.aggregateFunction, true)
+        (rewrittenAggregateExpression, aggregateFunctionAttribute)
     }.unzip
 
     val finalAndCompleteAggregate = if (usesTungstenAggregate) {
-      val rewrittenResultExpressions = resultExpressions.map { expr =>
-        expr.transform {
-          case agg: AggregateExpression2 =>
-            val function = agg.aggregateFunction
-            val isDistinct = agg.isDistinct
-            val aggregateFunction =
-              if (rewrittenAggregateFunctions.contains(function, isDistinct)) {
-                // If this function has been rewritten, we get the rewritten version from
-                // rewrittenAggregateFunctions.
-                rewrittenAggregateFunctions(function, isDistinct)
-              } else {
-                // Oterwise, we get it from aggregateFunctionMap, which contains unique
-                // aggregate functions that have not been rewritten.
-                aggregateFunctionMap(function, isDistinct)._1
-              }
-            aggregateFunction.asInstanceOf[DeclarativeAggregate].evaluateExpression
-          case expression =>
-            // We do not rely on the equality check at here since attributes may
-            // different cosmetically. Instead, we use semanticEquals.
-            groupExpressionMap.collectFirst {
-              case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-            }.getOrElse(expression)
-        }.asInstanceOf[NamedExpression]
-      }
-
       TungstenAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
+        nonCompleteAggregateAttributes = finalAggregateAttributes,
         completeAggregateExpressions = completeAggregateExpressions,
-        resultExpressions = rewrittenResultExpressions,
+        completeAggregateAttributes = completeAggregateAttributes,
+        resultExpressions = resultExpressions,
         child = partialMergeAggregate)
     } else {
-      val rewrittenResultExpressions = resultExpressions.map { expr =>
-        expr.transform {
-          case agg: AggregateExpression2 =>
-            aggregateFunctionMap(agg.aggregateFunction, agg.isDistinct)._2
-          case expression =>
-            // We do not rely on the equality check at here since attributes may
-            // different cosmetically. Instead, we use semanticEquals.
-            groupExpressionMap.collectFirst {
-              case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-            }.getOrElse(expression)
-        }.asInstanceOf[NamedExpression]
-      }
       SortBasedAggregate(
-        requiredChildDistributionExpressions = Some(namedGroupingAttributes),
-        groupingExpressions = namedGroupingAttributes,
+        requiredChildDistributionExpressions = Some(groupingAttributes),
+        groupingExpressions = groupingAttributes,
         nonCompleteAggregateExpressions = finalAggregateExpressions,
         nonCompleteAggregateAttributes = finalAggregateAttributes,
         completeAggregateExpressions = completeAggregateExpressions,
         completeAggregateAttributes = completeAggregateAttributes,
-        initialInputBufferOffset = (namedGroupingAttributes ++ distinctColumnAttributes).length,
-        resultExpressions = rewrittenResultExpressions,
+        initialInputBufferOffset = (groupingAttributes ++ distinctColumnAttributes).length,
+        resultExpressions = resultExpressions,
         child = partialMergeAggregate)
     }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
index 7ca677a6c72a..ed974b3a53d4 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
@@ -38,7 +38,7 @@ class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLConte
         () => new InterpretedMutableProjection(expr, schema)
       }
       val dummyAccum = SQLMetrics.createLongMetric(sparkContext, "dummy")
-      iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty,
+      iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty, Seq.empty, Seq.empty,
         Seq.empty, newMutableProjection, Seq.empty, None, dummyAccum, dummyAccum)
       val numPages = iter.getHashMap.getNumDataPages
       assert(numPages === 1)

From 02149ff08eed3745086589a047adbce9a580389f Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 8 Oct 2015 16:18:35 -0700
Subject: [PATCH 189/896] [SPARK-8848] [SQL] Refactors Parquet write path to
 follow parquet-format

This PR refactors Parquet write path to follow parquet-format spec.  It's a successor of PR #7679, but with less non-essential changes.

Major changes include:

1.  Replaces `RowWriteSupport` and `MutableRowWriteSupport` with `CatalystWriteSupport`

    - Writes Parquet data using standard layout defined in parquet-format

      Specifically, we are now writing ...

      - ... arrays and maps in standard 3-level structure with proper annotations and field names
      - ... decimals as `INT32` and `INT64` whenever possible, and taking `FIXED_LEN_BYTE_ARRAY` as the final fallback

    - Supports legacy mode which is compatible with Spark 1.4 and prior versions

      The legacy mode is by default off, and can be turned on by flipping SQL option `spark.sql.parquet.writeLegacyFormat` to `true`.

    - Eliminates per value data type dispatching costs via prebuilt composed writer functions

1.  Cleans up the last pieces of old Parquet support code

As pointed out by rxin previously, we probably want to rename all those `Catalyst*` Parquet classes to `Parquet*` for clarity.  But I'd like to do this in a follow-up PR to minimize code review noises in this one.

Author: Cheng Lian <lian@databricks.com>

Closes #8988 from liancheng/spark-8848/standard-parquet-write-path.
---
 .../org/apache/spark/sql/types/Decimal.scala  |   4 +-
 .../scala/org/apache/spark/sql/SQLConf.scala  |   5 +-
 .../parquet/CatalystReadSupport.scala         |  35 +-
 .../parquet/CatalystRowConverter.scala        |  59 +--
 .../parquet/CatalystSchemaConverter.scala     |  46 +-
 .../parquet/CatalystWriteSupport.scala        | 436 ++++++++++++++++++
 .../DirectParquetOutputCommitter.scala        |   2 +-
 .../parquet/ParquetConverter.scala            |  39 --
 .../datasources/parquet/ParquetFilters.scala  |  36 --
 .../datasources/parquet/ParquetRelation.scala |  42 +-
 .../parquet/ParquetTableSupport.scala         | 321 -------------
 .../parquet/ParquetTypesConverter.scala       | 160 -------
 .../spark/sql/UserDefinedTypeSuite.scala      |  32 +-
 .../datasources/parquet/ParquetIOSuite.scala  |  63 +--
 .../parquet/ParquetQuerySuite.scala           |  46 +-
 .../parquet/ParquetSchemaSuite.scala          |   4 +-
 .../datasources/parquet/ParquetTest.scala     |  44 +-
 .../sql/hive/HiveMetastoreCatalogSuite.scala  |  28 +-
 18 files changed, 709 insertions(+), 693 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetConverter.scala
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTableSupport.scala
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTypesConverter.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
index 909b8e31f245..c11dab35cdf6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
@@ -108,7 +108,9 @@ final class Decimal extends Ordered[Decimal] with Serializable {
    */
   def set(decimal: BigDecimal, precision: Int, scale: Int): Decimal = {
     this.decimalVal = decimal.setScale(scale, ROUNDING_MODE)
-    require(decimalVal.precision <= precision, "Overflowed precision")
+    require(
+      decimalVal.precision <= precision,
+      s"Decimal precision ${decimalVal.precision} exceeds max precision $precision")
     this.longVal = 0L
     this._precision = precision
     this._scale = scale
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 8f0f8910b36a..47397c4be3cb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -292,10 +292,9 @@ private[spark] object SQLConf {
 
   val PARQUET_WRITE_LEGACY_FORMAT = booleanConf(
     key = "spark.sql.parquet.writeLegacyFormat",
-    defaultValue = Some(true),
+    defaultValue = Some(false),
     doc = "Whether to follow Parquet's format specification when converting Parquet schema to " +
-      "Spark SQL schema and vice versa.",
-    isPublic = false)
+      "Spark SQL schema and vice versa.")
 
   val PARQUET_OUTPUT_COMMITTER_CLASS = stringConf(
     key = "spark.sql.parquet.output.committer.class",
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
index 532569803409..a958373eb769 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystReadSupport.scala
@@ -95,7 +95,9 @@ private[parquet] class CatalystReadSupport extends ReadSupport[InternalRow] with
        """.stripMargin
     }
 
-    new CatalystRecordMaterializer(parquetRequestedSchema, catalystRequestedSchema)
+    new CatalystRecordMaterializer(
+      parquetRequestedSchema,
+      CatalystReadSupport.expandUDT(catalystRequestedSchema))
   }
 }
 
@@ -110,7 +112,10 @@ private[parquet] object CatalystReadSupport {
    */
   def clipParquetSchema(parquetSchema: MessageType, catalystSchema: StructType): MessageType = {
     val clippedParquetFields = clipParquetGroupFields(parquetSchema.asGroupType(), catalystSchema)
-    Types.buildMessage().addFields(clippedParquetFields: _*).named("root")
+    Types
+      .buildMessage()
+      .addFields(clippedParquetFields: _*)
+      .named(CatalystSchemaConverter.SPARK_PARQUET_SCHEMA_NAME)
   }
 
   private def clipParquetType(parquetType: Type, catalystType: DataType): Type = {
@@ -271,4 +276,30 @@ private[parquet] object CatalystReadSupport {
         .getOrElse(toParquet.convertField(f))
     }
   }
+
+  def expandUDT(schema: StructType): StructType = {
+    def expand(dataType: DataType): DataType = {
+      dataType match {
+        case t: ArrayType =>
+          t.copy(elementType = expand(t.elementType))
+
+        case t: MapType =>
+          t.copy(
+            keyType = expand(t.keyType),
+            valueType = expand(t.valueType))
+
+        case t: StructType =>
+          val expandedFields = t.fields.map(f => f.copy(dataType = expand(f.dataType)))
+          t.copy(fields = expandedFields)
+
+        case t: UserDefinedType[_] =>
+          t.sqlType
+
+        case t =>
+          t
+      }
+    }
+
+    expand(schema).asInstanceOf[StructType]
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index 050d3610a641..247d35363b86 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -27,7 +27,6 @@ import org.apache.parquet.column.Dictionary
 import org.apache.parquet.io.api.{Binary, Converter, GroupConverter, PrimitiveConverter}
 import org.apache.parquet.schema.OriginalType.{INT_32, LIST, UTF8}
 import org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName.DOUBLE
-import org.apache.parquet.schema.Type.Repetition
 import org.apache.parquet.schema.{GroupType, MessageType, PrimitiveType, Type}
 
 import org.apache.spark.Logging
@@ -114,7 +113,8 @@ private[parquet] class CatalystPrimitiveConverter(val updater: ParentContainerUp
  * any "parent" container.
  *
  * @param parquetType Parquet schema of Parquet records
- * @param catalystType Spark SQL schema that corresponds to the Parquet record type
+ * @param catalystType Spark SQL schema that corresponds to the Parquet record type. User-defined
+ *        types should have been expanded.
  * @param updater An updater which propagates converted field values to the parent container
  */
 private[parquet] class CatalystRowConverter(
@@ -133,6 +133,12 @@ private[parquet] class CatalystRowConverter(
        |${catalystType.prettyJson}
      """.stripMargin)
 
+  assert(
+    !catalystType.existsRecursively(_.isInstanceOf[UserDefinedType[_]]),
+    s"""User-defined types in Catalyst schema should have already been expanded:
+       |${catalystType.prettyJson}
+     """.stripMargin)
+
   logDebug(
     s"""Building row converter for the following schema:
        |
@@ -268,13 +274,6 @@ private[parquet] class CatalystRowConverter(
           override def set(value: Any): Unit = updater.set(value.asInstanceOf[InternalRow].copy())
         })
 
-      case t: UserDefinedType[_] =>
-        val catalystTypeForUDT = t.sqlType
-        val nullable = parquetType.isRepetition(Repetition.OPTIONAL)
-        val field = StructField("udt", catalystTypeForUDT, nullable)
-        val parquetTypeForUDT = new CatalystSchemaConverter().convertField(field)
-        newConverter(parquetTypeForUDT, catalystTypeForUDT, updater)
-
       case _ =>
         throw new RuntimeException(
           s"Unable to create Parquet converter for data type ${catalystType.json}")
@@ -340,30 +339,36 @@ private[parquet] class CatalystRowConverter(
       val scale = decimalType.scale
 
       if (precision <= CatalystSchemaConverter.MAX_PRECISION_FOR_INT64) {
-        // Constructs a `Decimal` with an unscaled `Long` value if possible.  The underlying
-        // `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here we are using
-        // `Binary.toByteBuffer.array()` to steal the underlying byte array without copying it.
-        val buffer = value.toByteBuffer
-        val bytes = buffer.array()
-        val start = buffer.position()
-        val end = buffer.limit()
-
-        var unscaled = 0L
-        var i = start
-
-        while (i < end) {
-          unscaled = (unscaled << 8) | (bytes(i) & 0xff)
-          i += 1
-        }
-
-        val bits = 8 * (end - start)
-        unscaled = (unscaled << (64 - bits)) >> (64 - bits)
+        // Constructs a `Decimal` with an unscaled `Long` value if possible.
+        val unscaled = binaryToUnscaledLong(value)
         Decimal(unscaled, precision, scale)
       } else {
         // Otherwise, resorts to an unscaled `BigInteger` instead.
         Decimal(new BigDecimal(new BigInteger(value.getBytes), scale), precision, scale)
       }
     }
+
+    private def binaryToUnscaledLong(binary: Binary): Long = {
+      // The underlying `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here
+      // we are using `Binary.toByteBuffer.array()` to steal the underlying byte array without
+      // copying it.
+      val buffer = binary.toByteBuffer
+      val bytes = buffer.array()
+      val start = buffer.position()
+      val end = buffer.limit()
+
+      var unscaled = 0L
+      var i = start
+
+      while (i < end) {
+        unscaled = (unscaled << 8) | (bytes(i) & 0xff)
+        i += 1
+      }
+
+      val bits = 8 * (end - start)
+      unscaled = (unscaled << (64 - bits)) >> (64 - bits)
+      unscaled
+    }
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
index 6904fc736c10..7f3394c20ed3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
@@ -121,7 +121,7 @@ private[parquet] class CatalystSchemaConverter(
       val precision = field.getDecimalMetadata.getPrecision
       val scale = field.getDecimalMetadata.getScale
 
-      CatalystSchemaConverter.analysisRequire(
+      CatalystSchemaConverter.checkConversionRequirement(
         maxPrecision == -1 || 1 <= precision && precision <= maxPrecision,
         s"Invalid decimal precision: $typeName cannot store $precision digits (max $maxPrecision)")
 
@@ -155,7 +155,7 @@ private[parquet] class CatalystSchemaConverter(
         }
 
       case INT96 =>
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           assumeInt96IsTimestamp,
           "INT96 is not supported unless it's interpreted as timestamp. " +
             s"Please try to set ${SQLConf.PARQUET_INT96_AS_TIMESTAMP.key} to true.")
@@ -197,11 +197,11 @@ private[parquet] class CatalystSchemaConverter(
       //
       // See: https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#lists
       case LIST =>
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           field.getFieldCount == 1, s"Invalid list type $field")
 
         val repeatedType = field.getType(0)
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           repeatedType.isRepetition(REPEATED), s"Invalid list type $field")
 
         if (isElementType(repeatedType, field.getName)) {
@@ -217,17 +217,17 @@ private[parquet] class CatalystSchemaConverter(
       // See: https://github.com/apache/parquet-format/blob/master/LogicalTypes.md#backward-compatibility-rules-1
       // scalastyle:on
       case MAP | MAP_KEY_VALUE =>
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           field.getFieldCount == 1 && !field.getType(0).isPrimitive,
           s"Invalid map type: $field")
 
         val keyValueType = field.getType(0).asGroupType()
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           keyValueType.isRepetition(REPEATED) && keyValueType.getFieldCount == 2,
           s"Invalid map type: $field")
 
         val keyType = keyValueType.getType(0)
-        CatalystSchemaConverter.analysisRequire(
+        CatalystSchemaConverter.checkConversionRequirement(
           keyType.isPrimitive,
           s"Map key type is expected to be a primitive type, but found: $keyType")
 
@@ -299,7 +299,10 @@ private[parquet] class CatalystSchemaConverter(
    * Converts a Spark SQL [[StructType]] to a Parquet [[MessageType]].
    */
   def convert(catalystSchema: StructType): MessageType = {
-    Types.buildMessage().addFields(catalystSchema.map(convertField): _*).named("root")
+    Types
+      .buildMessage()
+      .addFields(catalystSchema.map(convertField): _*)
+      .named(CatalystSchemaConverter.SPARK_PARQUET_SCHEMA_NAME)
   }
 
   /**
@@ -347,10 +350,10 @@ private[parquet] class CatalystSchemaConverter(
       // NOTE: Spark SQL TimestampType is NOT a well defined type in Parquet format spec.
       //
       // As stated in PARQUET-323, Parquet `INT96` was originally introduced to represent nanosecond
-      // timestamp in Impala for some historical reasons, it's not recommended to be used for any
-      // other types and will probably be deprecated in future Parquet format spec.  That's the
-      // reason why Parquet format spec only defines `TIMESTAMP_MILLIS` and `TIMESTAMP_MICROS` which
-      // are both logical types annotating `INT64`.
+      // timestamp in Impala for some historical reasons.  It's not recommended to be used for any
+      // other types and will probably be deprecated in some future version of parquet-format spec.
+      // That's the reason why parquet-format spec only defines `TIMESTAMP_MILLIS` and
+      // `TIMESTAMP_MICROS` which are both logical types annotating `INT64`.
       //
       // Originally, Spark SQL uses the same nanosecond timestamp type as Impala and Hive.  Starting
       // from Spark 1.5.0, we resort to a timestamp type with 100 ns precision so that we can store
@@ -361,7 +364,7 @@ private[parquet] class CatalystSchemaConverter(
       // currently not implemented yet because parquet-mr 1.7.0 (the version we're currently using)
       // hasn't implemented `TIMESTAMP_MICROS` yet.
       //
-      // TODO Implements `TIMESTAMP_MICROS` once parquet-mr has that.
+      // TODO Converts `TIMESTAMP_MICROS` once parquet-mr implements that.
       case TimestampType =>
         Types.primitive(INT96, repetition).named(field.name)
 
@@ -523,11 +526,12 @@ private[parquet] class CatalystSchemaConverter(
   }
 }
 
-
 private[parquet] object CatalystSchemaConverter {
+  val SPARK_PARQUET_SCHEMA_NAME = "spark_schema"
+
   def checkFieldName(name: String): Unit = {
     // ,;{}()\n\t= and space are special characters in Parquet schema
-    analysisRequire(
+    checkConversionRequirement(
       !name.matches(".*[ ,;{}()\n\t=].*"),
       s"""Attribute name "$name" contains invalid character(s) among " ,;{}()\\n\\t=".
          |Please use alias to rename it.
@@ -539,7 +543,7 @@ private[parquet] object CatalystSchemaConverter {
     schema
   }
 
-  def analysisRequire(f: => Boolean, message: String): Unit = {
+  def checkConversionRequirement(f: => Boolean, message: String): Unit = {
     if (!f) {
       throw new AnalysisException(message)
     }
@@ -553,16 +557,8 @@ private[parquet] object CatalystSchemaConverter {
     numBytes
   }
 
-  private val MIN_BYTES_FOR_PRECISION = Array.tabulate[Int](39)(computeMinBytesForPrecision)
-
   // Returns the minimum number of bytes needed to store a decimal with a given `precision`.
-  def minBytesForPrecision(precision : Int) : Int = {
-    if (precision < MIN_BYTES_FOR_PRECISION.length) {
-      MIN_BYTES_FOR_PRECISION(precision)
-    } else {
-      computeMinBytesForPrecision(precision)
-    }
-  }
+  val minBytesForPrecision = Array.tabulate[Int](39)(computeMinBytesForPrecision)
 
   val MAX_PRECISION_FOR_INT32 = maxPrecisionForBytes(4) /* 9 */
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
new file mode 100644
index 000000000000..483363d2c1a2
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
@@ -0,0 +1,436 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.parquet
+
+import java.nio.{ByteBuffer, ByteOrder}
+import java.util
+
+import scala.collection.JavaConverters.mapAsJavaMapConverter
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.parquet.column.ParquetProperties
+import org.apache.parquet.hadoop.ParquetOutputFormat
+import org.apache.parquet.hadoop.api.WriteSupport
+import org.apache.parquet.hadoop.api.WriteSupport.WriteContext
+import org.apache.parquet.io.api.{Binary, RecordConsumer}
+
+import org.apache.spark.Logging
+import org.apache.spark.sql.SQLConf
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.SpecializedGetters
+import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.execution.datasources.parquet.CatalystSchemaConverter.{MAX_PRECISION_FOR_INT32, MAX_PRECISION_FOR_INT64, minBytesForPrecision}
+import org.apache.spark.sql.types._
+
+/**
+ * A Parquet [[WriteSupport]] implementation that writes Catalyst [[InternalRow]]s as Parquet
+ * messages.  This class can write Parquet data in two modes:
+ *
+ *  - Standard mode: Parquet data are written in standard format defined in parquet-format spec.
+ *  - Legacy mode: Parquet data are written in legacy format compatible with Spark 1.4 and prior.
+ *
+ * This behavior can be controlled by SQL option `spark.sql.parquet.writeLegacyFormat`.  The value
+ * of this option is propagated to this class by the `init()` method and its Hadoop configuration
+ * argument.
+ */
+private[parquet] class CatalystWriteSupport extends WriteSupport[InternalRow] with Logging {
+  // A `ValueWriter` is responsible for writing a field of an `InternalRow` to the record consumer.
+  // Here we are using `SpecializedGetters` rather than `InternalRow` so that we can directly access
+  // data in `ArrayData` without the help of `SpecificMutableRow`.
+  private type ValueWriter = (SpecializedGetters, Int) => Unit
+
+  // Schema of the `InternalRow`s to be written
+  private var schema: StructType = _
+
+  // `ValueWriter`s for all fields of the schema
+  private var rootFieldWriters: Seq[ValueWriter] = _
+
+  // The Parquet `RecordConsumer` to which all `InternalRow`s are written
+  private var recordConsumer: RecordConsumer = _
+
+  // Whether to write data in legacy Parquet format compatible with Spark 1.4 and prior versions
+  private var writeLegacyParquetFormat: Boolean = _
+
+  // Reusable byte array used to write timestamps as Parquet INT96 values
+  private val timestampBuffer = new Array[Byte](12)
+
+  // Reusable byte array used to write decimal values
+  private val decimalBuffer = new Array[Byte](minBytesForPrecision(DecimalType.MAX_PRECISION))
+
+  override def init(configuration: Configuration): WriteContext = {
+    val schemaString = configuration.get(CatalystWriteSupport.SPARK_ROW_SCHEMA)
+    this.schema = StructType.fromString(schemaString)
+    this.writeLegacyParquetFormat = {
+      // `SQLConf.PARQUET_WRITE_LEGACY_FORMAT` should always be explicitly set in ParquetRelation
+      assert(configuration.get(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key) != null)
+      configuration.get(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key).toBoolean
+    }
+    this.rootFieldWriters = schema.map(_.dataType).map(makeWriter)
+
+    val messageType = new CatalystSchemaConverter(configuration).convert(schema)
+    val metadata = Map(CatalystReadSupport.SPARK_METADATA_KEY -> schemaString).asJava
+
+    logInfo(
+      s"""Initialized Parquet WriteSupport with Catalyst schema:
+         |${schema.prettyJson}
+         |and corresponding Parquet message type:
+         |$messageType
+       """.stripMargin)
+
+    new WriteContext(messageType, metadata)
+  }
+
+  override def prepareForWrite(recordConsumer: RecordConsumer): Unit = {
+    this.recordConsumer = recordConsumer
+  }
+
+  override def write(row: InternalRow): Unit = {
+    consumeMessage {
+      writeFields(row, schema, rootFieldWriters)
+    }
+  }
+
+  private def writeFields(
+      row: InternalRow, schema: StructType, fieldWriters: Seq[ValueWriter]): Unit = {
+    var i = 0
+    while (i < row.numFields) {
+      if (!row.isNullAt(i)) {
+        consumeField(schema(i).name, i) {
+          fieldWriters(i).apply(row, i)
+        }
+      }
+      i += 1
+    }
+  }
+
+  private def makeWriter(dataType: DataType): ValueWriter = {
+    dataType match {
+      case BooleanType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addBoolean(row.getBoolean(ordinal))
+
+      case ByteType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addInteger(row.getByte(ordinal))
+
+      case ShortType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addInteger(row.getShort(ordinal))
+
+      case IntegerType | DateType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addInteger(row.getInt(ordinal))
+
+      case LongType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addLong(row.getLong(ordinal))
+
+      case FloatType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addFloat(row.getFloat(ordinal))
+
+      case DoubleType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addDouble(row.getDouble(ordinal))
+
+      case StringType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addBinary(Binary.fromByteArray(row.getUTF8String(ordinal).getBytes))
+
+      case TimestampType =>
+        (row: SpecializedGetters, ordinal: Int) => {
+          // TODO Writes `TimestampType` values as `TIMESTAMP_MICROS` once parquet-mr implements it
+          // Currently we only support timestamps stored as INT96, which is compatible with Hive
+          // and Impala.  However, INT96 is to be deprecated.  We plan to support `TIMESTAMP_MICROS`
+          // defined in the parquet-format spec.  But up until writing, the most recent parquet-mr
+          // version (1.8.1) hasn't implemented it yet.
+
+          // NOTE: Starting from Spark 1.5, Spark SQL `TimestampType` only has microsecond
+          // precision.  Nanosecond parts of timestamp values read from INT96 are simply stripped.
+          val (julianDay, timeOfDayNanos) = DateTimeUtils.toJulianDay(row.getLong(ordinal))
+          val buf = ByteBuffer.wrap(timestampBuffer)
+          buf.order(ByteOrder.LITTLE_ENDIAN).putLong(timeOfDayNanos).putInt(julianDay)
+          recordConsumer.addBinary(Binary.fromByteArray(timestampBuffer))
+        }
+
+      case BinaryType =>
+        (row: SpecializedGetters, ordinal: Int) =>
+          recordConsumer.addBinary(Binary.fromByteArray(row.getBinary(ordinal)))
+
+      case DecimalType.Fixed(precision, scale) =>
+        makeDecimalWriter(precision, scale)
+
+      case t: StructType =>
+        val fieldWriters = t.map(_.dataType).map(makeWriter)
+        (row: SpecializedGetters, ordinal: Int) =>
+          consumeGroup {
+            writeFields(row.getStruct(ordinal, t.length), t, fieldWriters)
+          }
+
+      case t: ArrayType => makeArrayWriter(t)
+
+      case t: MapType => makeMapWriter(t)
+
+      case t: UserDefinedType[_] => makeWriter(t.sqlType)
+
+      // TODO Adds IntervalType support
+      case _ => sys.error(s"Unsupported data type $dataType.")
+    }
+  }
+
+  private def makeDecimalWriter(precision: Int, scale: Int): ValueWriter = {
+    assert(
+      precision <= DecimalType.MAX_PRECISION,
+      s"Decimal precision $precision exceeds max precision ${DecimalType.MAX_PRECISION}")
+
+    val numBytes = minBytesForPrecision(precision)
+
+    val int32Writer =
+      (row: SpecializedGetters, ordinal: Int) => {
+        val unscaledLong = row.getDecimal(ordinal, precision, scale).toUnscaledLong
+        recordConsumer.addInteger(unscaledLong.toInt)
+      }
+
+    val int64Writer =
+      (row: SpecializedGetters, ordinal: Int) => {
+        val unscaledLong = row.getDecimal(ordinal, precision, scale).toUnscaledLong
+        recordConsumer.addLong(unscaledLong)
+      }
+
+    val binaryWriterUsingUnscaledLong =
+      (row: SpecializedGetters, ordinal: Int) => {
+        // When the precision is low enough (<= 18) to squeeze the decimal value into a `Long`, we
+        // can build a fixed-length byte array with length `numBytes` using the unscaled `Long`
+        // value and the `decimalBuffer` for better performance.
+        val unscaled = row.getDecimal(ordinal, precision, scale).toUnscaledLong
+        var i = 0
+        var shift = 8 * (numBytes - 1)
+
+        while (i < numBytes) {
+          decimalBuffer(i) = (unscaled >> shift).toByte
+          i += 1
+          shift -= 8
+        }
+
+        recordConsumer.addBinary(Binary.fromByteArray(decimalBuffer, 0, numBytes))
+      }
+
+    val binaryWriterUsingUnscaledBytes =
+      (row: SpecializedGetters, ordinal: Int) => {
+        val decimal = row.getDecimal(ordinal, precision, scale)
+        val bytes = decimal.toJavaBigDecimal.unscaledValue().toByteArray
+        val fixedLengthBytes = if (bytes.length == numBytes) {
+          // If the length of the underlying byte array of the unscaled `BigInteger` happens to be
+          // `numBytes`, just reuse it, so that we don't bother copying it to `decimalBuffer`.
+          bytes
+        } else {
+          // Otherwise, the length must be less than `numBytes`.  In this case we copy contents of
+          // the underlying bytes with padding sign bytes to `decimalBuffer` to form the result
+          // fixed-length byte array.
+          val signByte = if (bytes.head < 0) -1: Byte else 0: Byte
+          util.Arrays.fill(decimalBuffer, 0, numBytes - bytes.length, signByte)
+          System.arraycopy(bytes, 0, decimalBuffer, numBytes - bytes.length, bytes.length)
+          decimalBuffer
+        }
+
+        recordConsumer.addBinary(Binary.fromByteArray(fixedLengthBytes, 0, numBytes))
+      }
+
+    writeLegacyParquetFormat match {
+      // Standard mode, 1 <= precision <= 9, writes as INT32
+      case false if precision <= MAX_PRECISION_FOR_INT32 => int32Writer
+
+      // Standard mode, 10 <= precision <= 18, writes as INT64
+      case false if precision <= MAX_PRECISION_FOR_INT64 => int64Writer
+
+      // Legacy mode, 1 <= precision <= 18, writes as FIXED_LEN_BYTE_ARRAY
+      case true if precision <= MAX_PRECISION_FOR_INT64 => binaryWriterUsingUnscaledLong
+
+      // Either standard or legacy mode, 19 <= precision <= 38, writes as FIXED_LEN_BYTE_ARRAY
+      case _ => binaryWriterUsingUnscaledBytes
+    }
+  }
+
+  def makeArrayWriter(arrayType: ArrayType): ValueWriter = {
+    val elementWriter = makeWriter(arrayType.elementType)
+
+    def threeLevelArrayWriter(repeatedGroupName: String, elementFieldName: String): ValueWriter =
+      (row: SpecializedGetters, ordinal: Int) => {
+        val array = row.getArray(ordinal)
+        consumeGroup {
+          // Only creates the repeated field if the array is non-empty.
+          if (array.numElements() > 0) {
+            consumeField(repeatedGroupName, 0) {
+              var i = 0
+              while (i < array.numElements()) {
+                consumeGroup {
+                  // Only creates the element field if the current array element is not null.
+                  if (!array.isNullAt(i)) {
+                    consumeField(elementFieldName, 0) {
+                      elementWriter.apply(array, i)
+                    }
+                  }
+                }
+                i += 1
+              }
+            }
+          }
+        }
+      }
+
+    def twoLevelArrayWriter(repeatedFieldName: String): ValueWriter =
+      (row: SpecializedGetters, ordinal: Int) => {
+        val array = row.getArray(ordinal)
+        consumeGroup {
+          // Only creates the repeated field if the array is non-empty.
+          if (array.numElements() > 0) {
+            consumeField(repeatedFieldName, 0) {
+              var i = 0
+              while (i < array.numElements()) {
+                elementWriter.apply(array, i)
+                i += 1
+              }
+            }
+          }
+        }
+      }
+
+    (writeLegacyParquetFormat, arrayType.containsNull) match {
+      case (legacyMode @ false, _) =>
+        // Standard mode:
+        //
+        //   <list-repetition> group <name> (LIST) {
+        //     repeated group list {
+        //                    ^~~~  repeatedGroupName
+        //       <element-repetition> <element-type> element;
+        //                                           ^~~~~~~  elementFieldName
+        //     }
+        //   }
+        threeLevelArrayWriter(repeatedGroupName = "list", elementFieldName = "element")
+
+      case (legacyMode @ true, nullableElements @ true) =>
+        // Legacy mode, with nullable elements:
+        //
+        //   <list-repetition> group <name> (LIST) {
+        //     optional group bag {
+        //                    ^~~  repeatedGroupName
+        //       repeated <element-type> array;
+        //                               ^~~~~ elementFieldName
+        //     }
+        //   }
+        threeLevelArrayWriter(repeatedGroupName = "bag", elementFieldName = "array")
+
+      case (legacyMode @ true, nullableElements @ false) =>
+        // Legacy mode, with non-nullable elements:
+        //
+        //   <list-repetition> group <name> (LIST) {
+        //     repeated <element-type> array;
+        //                             ^~~~~  repeatedFieldName
+        //   }
+        twoLevelArrayWriter(repeatedFieldName = "array")
+    }
+  }
+
+  private def makeMapWriter(mapType: MapType): ValueWriter = {
+    val keyWriter = makeWriter(mapType.keyType)
+    val valueWriter = makeWriter(mapType.valueType)
+    val repeatedGroupName = if (writeLegacyParquetFormat) {
+      // Legacy mode:
+      //
+      //   <map-repetition> group <name> (MAP) {
+      //     repeated group map (MAP_KEY_VALUE) {
+      //                    ^~~  repeatedGroupName
+      //       required <key-type> key;
+      //       <value-repetition> <value-type> value;
+      //     }
+      //   }
+      "map"
+    } else {
+      // Standard mode:
+      //
+      //   <map-repetition> group <name> (MAP) {
+      //     repeated group key_value {
+      //                    ^~~~~~~~~  repeatedGroupName
+      //       required <key-type> key;
+      //       <value-repetition> <value-type> value;
+      //     }
+      //   }
+      "key_value"
+    }
+
+    (row: SpecializedGetters, ordinal: Int) => {
+      val map = row.getMap(ordinal)
+      val keyArray = map.keyArray()
+      val valueArray = map.valueArray()
+
+      consumeGroup {
+        // Only creates the repeated field if the map is non-empty.
+        if (map.numElements() > 0) {
+          consumeField(repeatedGroupName, 0) {
+            var i = 0
+            while (i < map.numElements()) {
+              consumeGroup {
+                consumeField("key", 0) {
+                  keyWriter.apply(keyArray, i)
+                }
+
+                // Only creates the "value" field if the value if non-empty
+                if (!map.valueArray().isNullAt(i)) {
+                  consumeField("value", 1) {
+                    valueWriter.apply(valueArray, i)
+                  }
+                }
+              }
+              i += 1
+            }
+          }
+        }
+      }
+    }
+  }
+
+  private def consumeMessage(f: => Unit): Unit = {
+    recordConsumer.startMessage()
+    f
+    recordConsumer.endMessage()
+  }
+
+  private def consumeGroup(f: => Unit): Unit = {
+    recordConsumer.startGroup()
+    f
+    recordConsumer.endGroup()
+  }
+
+  private def consumeField(field: String, index: Int)(f: => Unit): Unit = {
+    recordConsumer.startField(field, index)
+    f
+    recordConsumer.endField(field, index)
+  }
+}
+
+private[parquet] object CatalystWriteSupport {
+  val SPARK_ROW_SCHEMA: String = "org.apache.spark.sql.parquet.row.attributes"
+
+  def setSchema(schema: StructType, configuration: Configuration): Unit = {
+    schema.map(_.name).foreach(CatalystSchemaConverter.checkFieldName)
+    configuration.set(SPARK_ROW_SCHEMA, schema.json)
+    configuration.set(
+      ParquetOutputFormat.WRITER_VERSION,
+      ParquetProperties.WriterVersion.PARQUET_1_0.toString)
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/DirectParquetOutputCommitter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/DirectParquetOutputCommitter.scala
index de1fd0166ac5..300e8677b312 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/DirectParquetOutputCommitter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/DirectParquetOutputCommitter.scala
@@ -39,7 +39,7 @@ import org.apache.parquet.hadoop.{ParquetFileReader, ParquetFileWriter, ParquetO
  *
  *   NEVER use [[DirectParquetOutputCommitter]] when appending data, because currently there's
  *   no safe way undo a failed appending job (that's why both `abortTask()` and `abortJob()` are
- *   left * empty).
+ *   left empty).
  */
 private[parquet] class DirectParquetOutputCommitter(outputPath: Path, context: TaskAttemptContext)
   extends ParquetOutputCommitter(outputPath, context) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetConverter.scala
deleted file mode 100644
index ccd7ebf319af..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetConverter.scala
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.datasources.parquet
-
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.types.{MapData, ArrayData}
-
-// TODO Removes this while fixing SPARK-8848
-private[sql] object CatalystConverter {
-  // This is mostly Parquet convention (see, e.g., `ConversionPatterns`).
-  // Note that "array" for the array elements is chosen by ParquetAvro.
-  // Using a different value will result in Parquet silently dropping columns.
-  val ARRAY_CONTAINS_NULL_BAG_SCHEMA_NAME = "bag"
-  val ARRAY_ELEMENTS_SCHEMA_NAME = "array"
-
-  val MAP_KEY_SCHEMA_NAME = "key"
-  val MAP_VALUE_SCHEMA_NAME = "value"
-  val MAP_SCHEMA_NAME = "map"
-
-  // TODO: consider using Array[T] for arrays to avoid boxing of primitive types
-  type ArrayScalaType = ArrayData
-  type StructScalaType = InternalRow
-  type MapScalaType = MapData
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
index c6b3fe7900da..78040d99fb0a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
@@ -18,24 +18,17 @@
 package org.apache.spark.sql.execution.datasources.parquet
 
 import java.io.Serializable
-import java.nio.ByteBuffer
 
-import com.google.common.io.BaseEncoding
-import org.apache.hadoop.conf.Configuration
 import org.apache.parquet.filter2.predicate.FilterApi._
 import org.apache.parquet.filter2.predicate._
 import org.apache.parquet.io.api.Binary
 import org.apache.parquet.schema.OriginalType
 import org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName
 
-import org.apache.spark.SparkEnv
-import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.sources
 import org.apache.spark.sql.types._
 
 private[sql] object ParquetFilters {
-  val PARQUET_FILTER_DATA = "org.apache.spark.sql.parquet.row.filter"
-
   case class SetInFilter[T <: Comparable[T]](
     valueSet: Set[T]) extends UserDefinedPredicate[T] with Serializable {
 
@@ -282,33 +275,4 @@ private[sql] object ParquetFilters {
     addMethod.setAccessible(true)
     addMethod.invoke(null, classOf[Binary], enumTypeDescriptor)
   }
-
-  /**
-   * Note: Inside the Hadoop API we only have access to `Configuration`, not to
-   * [[org.apache.spark.SparkContext]], so we cannot use broadcasts to convey
-   * the actual filter predicate.
-   */
-  def serializeFilterExpressions(filters: Seq[Expression], conf: Configuration): Unit = {
-    if (filters.nonEmpty) {
-      val serialized: Array[Byte] =
-        SparkEnv.get.closureSerializer.newInstance().serialize(filters).array()
-      val encoded: String = BaseEncoding.base64().encode(serialized)
-      conf.set(PARQUET_FILTER_DATA, encoded)
-    }
-  }
-
-  /**
-   * Note: Inside the Hadoop API we only have access to `Configuration`, not to
-   * [[org.apache.spark.SparkContext]], so we cannot use broadcasts to convey
-   * the actual filter predicate.
-   */
-  def deserializeFilterExpressions(conf: Configuration): Seq[Expression] = {
-    val data = conf.get(PARQUET_FILTER_DATA)
-    if (data != null) {
-      val decoded: Array[Byte] = BaseEncoding.base64().decode(data)
-      SparkEnv.get.closureSerializer.newInstance().deserialize(ByteBuffer.wrap(decoded))
-    } else {
-      Seq()
-    }
-  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 8a9c0e733a9a..77d851ca486b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -218,8 +218,8 @@ private[sql] class ParquetRelation(
     }
 
     // SPARK-9849 DirectParquetOutputCommitter qualified name should be backward compatible
-    val committerClassname = conf.get(SQLConf.PARQUET_OUTPUT_COMMITTER_CLASS.key)
-    if (committerClassname == "org.apache.spark.sql.parquet.DirectParquetOutputCommitter") {
+    val committerClassName = conf.get(SQLConf.PARQUET_OUTPUT_COMMITTER_CLASS.key)
+    if (committerClassName == "org.apache.spark.sql.parquet.DirectParquetOutputCommitter") {
       conf.set(SQLConf.PARQUET_OUTPUT_COMMITTER_CLASS.key,
         classOf[DirectParquetOutputCommitter].getCanonicalName)
     }
@@ -248,18 +248,22 @@ private[sql] class ParquetRelation(
     // bundled with `ParquetOutputFormat[Row]`.
     job.setOutputFormatClass(classOf[ParquetOutputFormat[Row]])
 
-    // TODO There's no need to use two kinds of WriteSupport
-    // We should unify them. `SpecificMutableRow` can process both atomic (primitive) types and
-    // complex types.
-    val writeSupportClass =
-      if (dataSchema.map(_.dataType).forall(ParquetTypesConverter.isPrimitiveType)) {
-        classOf[MutableRowWriteSupport]
-      } else {
-        classOf[RowWriteSupport]
-      }
+    ParquetOutputFormat.setWriteSupportClass(job, classOf[CatalystWriteSupport])
+    CatalystWriteSupport.setSchema(dataSchema, conf)
+
+    // Sets flags for `CatalystSchemaConverter` (which converts Catalyst schema to Parquet schema)
+    // and `CatalystWriteSupport` (writing actual rows to Parquet files).
+    conf.set(
+      SQLConf.PARQUET_BINARY_AS_STRING.key,
+      sqlContext.conf.isParquetBinaryAsString.toString)
 
-    ParquetOutputFormat.setWriteSupportClass(job, writeSupportClass)
-    RowWriteSupport.setSchema(dataSchema.toAttributes, conf)
+    conf.set(
+      SQLConf.PARQUET_INT96_AS_TIMESTAMP.key,
+      sqlContext.conf.isParquetINT96AsTimestamp.toString)
+
+    conf.set(
+      SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key,
+      sqlContext.conf.writeLegacyParquetFormat.toString)
 
     // Sets compression scheme
     conf.set(
@@ -287,7 +291,6 @@ private[sql] class ParquetRelation(
     val parquetFilterPushDown = sqlContext.conf.parquetFilterPushDown
     val assumeBinaryIsString = sqlContext.conf.isParquetBinaryAsString
     val assumeInt96IsTimestamp = sqlContext.conf.isParquetINT96AsTimestamp
-    val writeLegacyParquetFormat = sqlContext.conf.writeLegacyParquetFormat
 
     // Parquet row group size. We will use this value as the value for
     // mapreduce.input.fileinputformat.split.minsize and mapred.min.split.size if the value
@@ -304,8 +307,7 @@ private[sql] class ParquetRelation(
         useMetadataCache,
         parquetFilterPushDown,
         assumeBinaryIsString,
-        assumeInt96IsTimestamp,
-        writeLegacyParquetFormat) _
+        assumeInt96IsTimestamp) _
 
     // Create the function to set input paths at the driver side.
     val setInputPaths =
@@ -530,8 +532,7 @@ private[sql] object ParquetRelation extends Logging {
       useMetadataCache: Boolean,
       parquetFilterPushDown: Boolean,
       assumeBinaryIsString: Boolean,
-      assumeInt96IsTimestamp: Boolean,
-      writeLegacyParquetFormat: Boolean)(job: Job): Unit = {
+      assumeInt96IsTimestamp: Boolean)(job: Job): Unit = {
     val conf = SparkHadoopUtil.get.getConfigurationFromJobContext(job)
     conf.set(ParquetInputFormat.READ_SUPPORT_CLASS, classOf[CatalystReadSupport].getName)
 
@@ -552,16 +553,15 @@ private[sql] object ParquetRelation extends Logging {
     })
 
     conf.set(
-      RowWriteSupport.SPARK_ROW_SCHEMA,
+      CatalystWriteSupport.SPARK_ROW_SCHEMA,
       CatalystSchemaConverter.checkFieldNames(dataSchema).json)
 
     // Tell FilteringParquetRowInputFormat whether it's okay to cache Parquet and FS metadata
     conf.setBoolean(SQLConf.PARQUET_CACHE_METADATA.key, useMetadataCache)
 
-    // Sets flags for Parquet schema conversion
+    // Sets flags for `CatalystSchemaConverter`
     conf.setBoolean(SQLConf.PARQUET_BINARY_AS_STRING.key, assumeBinaryIsString)
     conf.setBoolean(SQLConf.PARQUET_INT96_AS_TIMESTAMP.key, assumeInt96IsTimestamp)
-    conf.setBoolean(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key, writeLegacyParquetFormat)
 
     overrideMinSplitSize(parquetBlockSize, conf)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTableSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTableSupport.scala
deleted file mode 100644
index ed89aa27aa1f..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTableSupport.scala
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.datasources.parquet
-
-import java.math.BigInteger
-import java.nio.{ByteBuffer, ByteOrder}
-import java.util.{HashMap => JHashMap}
-
-import org.apache.hadoop.conf.Configuration
-import org.apache.parquet.column.ParquetProperties
-import org.apache.parquet.hadoop.ParquetOutputFormat
-import org.apache.parquet.hadoop.api.WriteSupport
-import org.apache.parquet.io.api._
-
-import org.apache.spark.Logging
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
-import org.apache.spark.sql.types._
-import org.apache.spark.unsafe.types.UTF8String
-
-/**
- * A `parquet.hadoop.api.WriteSupport` for Row objects.
- */
-private[parquet] class RowWriteSupport extends WriteSupport[InternalRow] with Logging {
-
-  private[parquet] var writer: RecordConsumer = null
-  private[parquet] var attributes: Array[Attribute] = null
-
-  override def init(configuration: Configuration): WriteSupport.WriteContext = {
-    val origAttributesStr: String = configuration.get(RowWriteSupport.SPARK_ROW_SCHEMA)
-    val metadata = new JHashMap[String, String]()
-    metadata.put(CatalystReadSupport.SPARK_METADATA_KEY, origAttributesStr)
-
-    if (attributes == null) {
-      attributes = ParquetTypesConverter.convertFromString(origAttributesStr).toArray
-    }
-
-    log.debug(s"write support initialized for requested schema $attributes")
-    new WriteSupport.WriteContext(ParquetTypesConverter.convertFromAttributes(attributes), metadata)
-  }
-
-  override def prepareForWrite(recordConsumer: RecordConsumer): Unit = {
-    writer = recordConsumer
-    log.debug(s"preparing for write with schema $attributes")
-  }
-
-  override def write(record: InternalRow): Unit = {
-    val attributesSize = attributes.size
-    if (attributesSize > record.numFields) {
-      throw new IndexOutOfBoundsException("Trying to write more fields than contained in row " +
-        s"($attributesSize > ${record.numFields})")
-    }
-
-    var index = 0
-    writer.startMessage()
-    while(index < attributesSize) {
-      // null values indicate optional fields but we do not check currently
-      if (!record.isNullAt(index)) {
-        writer.startField(attributes(index).name, index)
-        writeValue(attributes(index).dataType, record.get(index, attributes(index).dataType))
-        writer.endField(attributes(index).name, index)
-      }
-      index = index + 1
-    }
-    writer.endMessage()
-  }
-
-  private[parquet] def writeValue(schema: DataType, value: Any): Unit = {
-    if (value != null) {
-      schema match {
-        case t: UserDefinedType[_] => writeValue(t.sqlType, value)
-        case t @ ArrayType(_, _) => writeArray(
-          t,
-          value.asInstanceOf[CatalystConverter.ArrayScalaType])
-        case t @ MapType(_, _, _) => writeMap(
-          t,
-          value.asInstanceOf[CatalystConverter.MapScalaType])
-        case t @ StructType(_) => writeStruct(
-          t,
-          value.asInstanceOf[CatalystConverter.StructScalaType])
-        case _ => writePrimitive(schema.asInstanceOf[AtomicType], value)
-      }
-    }
-  }
-
-  private[parquet] def writePrimitive(schema: DataType, value: Any): Unit = {
-    if (value != null) {
-      schema match {
-        case BooleanType => writer.addBoolean(value.asInstanceOf[Boolean])
-        case ByteType => writer.addInteger(value.asInstanceOf[Byte])
-        case ShortType => writer.addInteger(value.asInstanceOf[Short])
-        case IntegerType | DateType => writer.addInteger(value.asInstanceOf[Int])
-        case LongType => writer.addLong(value.asInstanceOf[Long])
-        case TimestampType => writeTimestamp(value.asInstanceOf[Long])
-        case FloatType => writer.addFloat(value.asInstanceOf[Float])
-        case DoubleType => writer.addDouble(value.asInstanceOf[Double])
-        case StringType => writer.addBinary(
-          Binary.fromByteArray(value.asInstanceOf[UTF8String].getBytes))
-        case BinaryType => writer.addBinary(
-          Binary.fromByteArray(value.asInstanceOf[Array[Byte]]))
-        case DecimalType.Fixed(precision, _) =>
-          writeDecimal(value.asInstanceOf[Decimal], precision)
-        case _ => sys.error(s"Do not know how to writer $schema to consumer")
-      }
-    }
-  }
-
-  private[parquet] def writeStruct(
-      schema: StructType,
-      struct: CatalystConverter.StructScalaType): Unit = {
-    if (struct != null) {
-      val fields = schema.fields.toArray
-      writer.startGroup()
-      var i = 0
-      while(i < fields.length) {
-        if (!struct.isNullAt(i)) {
-          writer.startField(fields(i).name, i)
-          writeValue(fields(i).dataType, struct.get(i, fields(i).dataType))
-          writer.endField(fields(i).name, i)
-        }
-        i = i + 1
-      }
-      writer.endGroup()
-    }
-  }
-
-  private[parquet] def writeArray(
-      schema: ArrayType,
-      array: CatalystConverter.ArrayScalaType): Unit = {
-    val elementType = schema.elementType
-    writer.startGroup()
-    if (array.numElements() > 0) {
-      if (schema.containsNull) {
-        writer.startField(CatalystConverter.ARRAY_CONTAINS_NULL_BAG_SCHEMA_NAME, 0)
-        var i = 0
-        while (i < array.numElements()) {
-          writer.startGroup()
-          if (!array.isNullAt(i)) {
-            writer.startField(CatalystConverter.ARRAY_ELEMENTS_SCHEMA_NAME, 0)
-            writeValue(elementType, array.get(i, elementType))
-            writer.endField(CatalystConverter.ARRAY_ELEMENTS_SCHEMA_NAME, 0)
-          }
-          writer.endGroup()
-          i = i + 1
-        }
-        writer.endField(CatalystConverter.ARRAY_CONTAINS_NULL_BAG_SCHEMA_NAME, 0)
-      } else {
-        writer.startField(CatalystConverter.ARRAY_ELEMENTS_SCHEMA_NAME, 0)
-        var i = 0
-        while (i < array.numElements()) {
-          writeValue(elementType, array.get(i, elementType))
-          i = i + 1
-        }
-        writer.endField(CatalystConverter.ARRAY_ELEMENTS_SCHEMA_NAME, 0)
-      }
-    }
-    writer.endGroup()
-  }
-
-  private[parquet] def writeMap(
-      schema: MapType,
-      map: CatalystConverter.MapScalaType): Unit = {
-    writer.startGroup()
-    val length = map.numElements()
-    if (length > 0) {
-      writer.startField(CatalystConverter.MAP_SCHEMA_NAME, 0)
-      map.foreach(schema.keyType, schema.valueType, (key, value) => {
-        writer.startGroup()
-        writer.startField(CatalystConverter.MAP_KEY_SCHEMA_NAME, 0)
-        writeValue(schema.keyType, key)
-        writer.endField(CatalystConverter.MAP_KEY_SCHEMA_NAME, 0)
-        if (value != null) {
-          writer.startField(CatalystConverter.MAP_VALUE_SCHEMA_NAME, 1)
-          writeValue(schema.valueType, value)
-          writer.endField(CatalystConverter.MAP_VALUE_SCHEMA_NAME, 1)
-        }
-        writer.endGroup()
-      })
-      writer.endField(CatalystConverter.MAP_SCHEMA_NAME, 0)
-    }
-    writer.endGroup()
-  }
-
-  // Scratch array used to write decimals as fixed-length byte array
-  private[this] var reusableDecimalBytes = new Array[Byte](16)
-
-  private[parquet] def writeDecimal(decimal: Decimal, precision: Int): Unit = {
-    val numBytes = CatalystSchemaConverter.minBytesForPrecision(precision)
-
-    def longToBinary(unscaled: Long): Binary = {
-      var i = 0
-      var shift = 8 * (numBytes - 1)
-      while (i < numBytes) {
-        reusableDecimalBytes(i) = (unscaled >> shift).toByte
-        i += 1
-        shift -= 8
-      }
-      Binary.fromByteArray(reusableDecimalBytes, 0, numBytes)
-    }
-
-    def bigIntegerToBinary(unscaled: BigInteger): Binary = {
-      unscaled.toByteArray match {
-        case bytes if bytes.length == numBytes =>
-          Binary.fromByteArray(bytes)
-
-        case bytes if bytes.length <= reusableDecimalBytes.length =>
-          val signedByte = (if (bytes.head < 0) -1 else 0).toByte
-          java.util.Arrays.fill(reusableDecimalBytes, 0, numBytes - bytes.length, signedByte)
-          System.arraycopy(bytes, 0, reusableDecimalBytes, numBytes - bytes.length, bytes.length)
-          Binary.fromByteArray(reusableDecimalBytes, 0, numBytes)
-
-        case bytes =>
-          reusableDecimalBytes = new Array[Byte](bytes.length)
-          bigIntegerToBinary(unscaled)
-      }
-    }
-
-    val binary = if (numBytes <= 8) {
-      longToBinary(decimal.toUnscaledLong)
-    } else {
-      bigIntegerToBinary(decimal.toJavaBigDecimal.unscaledValue())
-    }
-
-    writer.addBinary(binary)
-  }
-
-  // array used to write Timestamp as Int96 (fixed-length binary)
-  private[this] val int96buf = new Array[Byte](12)
-
-  private[parquet] def writeTimestamp(ts: Long): Unit = {
-    val (julianDay, timeOfDayNanos) = DateTimeUtils.toJulianDay(ts)
-    val buf = ByteBuffer.wrap(int96buf)
-    buf.order(ByteOrder.LITTLE_ENDIAN)
-    buf.putLong(timeOfDayNanos)
-    buf.putInt(julianDay)
-    writer.addBinary(Binary.fromByteArray(int96buf))
-  }
-}
-
-// Optimized for non-nested rows
-private[parquet] class MutableRowWriteSupport extends RowWriteSupport {
-  override def write(record: InternalRow): Unit = {
-    val attributesSize = attributes.size
-    if (attributesSize > record.numFields) {
-      throw new IndexOutOfBoundsException("Trying to write more fields than contained in row " +
-        s"($attributesSize > ${record.numFields})")
-    }
-
-    var index = 0
-    writer.startMessage()
-    while(index < attributesSize) {
-      // null values indicate optional fields but we do not check currently
-      if (!record.isNullAt(index) && !record.isNullAt(index)) {
-        writer.startField(attributes(index).name, index)
-        consumeType(attributes(index).dataType, record, index)
-        writer.endField(attributes(index).name, index)
-      }
-      index = index + 1
-    }
-    writer.endMessage()
-  }
-
-  private def consumeType(
-      ctype: DataType,
-      record: InternalRow,
-      index: Int): Unit = {
-    ctype match {
-      case BooleanType => writer.addBoolean(record.getBoolean(index))
-      case ByteType => writer.addInteger(record.getByte(index))
-      case ShortType => writer.addInteger(record.getShort(index))
-      case IntegerType | DateType => writer.addInteger(record.getInt(index))
-      case LongType => writer.addLong(record.getLong(index))
-      case TimestampType => writeTimestamp(record.getLong(index))
-      case FloatType => writer.addFloat(record.getFloat(index))
-      case DoubleType => writer.addDouble(record.getDouble(index))
-      case StringType =>
-        writer.addBinary(Binary.fromByteArray(record.getUTF8String(index).getBytes))
-      case BinaryType =>
-        writer.addBinary(Binary.fromByteArray(record.getBinary(index)))
-      case DecimalType.Fixed(precision, scale) =>
-        writeDecimal(record.getDecimal(index, precision, scale), precision)
-      case _ => sys.error(s"Unsupported datatype $ctype, cannot write to consumer")
-    }
-  }
-}
-
-private[parquet] object RowWriteSupport {
-  val SPARK_ROW_SCHEMA: String = "org.apache.spark.sql.parquet.row.attributes"
-
-  def getSchema(configuration: Configuration): Seq[Attribute] = {
-    val schemaString = configuration.get(RowWriteSupport.SPARK_ROW_SCHEMA)
-    if (schemaString == null) {
-      throw new RuntimeException("Missing schema!")
-    }
-    ParquetTypesConverter.convertFromString(schemaString)
-  }
-
-  def setSchema(schema: Seq[Attribute], configuration: Configuration) {
-    val encoded = ParquetTypesConverter.convertToString(schema)
-    configuration.set(SPARK_ROW_SCHEMA, encoded)
-    configuration.set(
-      ParquetOutputFormat.WRITER_VERSION,
-      ParquetProperties.WriterVersion.PARQUET_1_0.toString)
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTypesConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTypesConverter.scala
deleted file mode 100644
index b647bb6116af..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTypesConverter.scala
+++ /dev/null
@@ -1,160 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.datasources.parquet
-
-import java.io.IOException
-import java.util.{Collections, Arrays}
-
-import scala.util.Try
-
-import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.fs.{FileSystem, Path}
-import org.apache.hadoop.mapreduce.Job
-import org.apache.parquet.format.converter.ParquetMetadataConverter
-import org.apache.parquet.hadoop.metadata.{FileMetaData, ParquetMetadata}
-import org.apache.parquet.hadoop.util.ContextUtil
-import org.apache.parquet.hadoop.{Footer, ParquetFileReader, ParquetFileWriter}
-import org.apache.parquet.schema.MessageType
-
-import org.apache.spark.Logging
-import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.types._
-
-
-private[parquet] object ParquetTypesConverter extends Logging {
-  def isPrimitiveType(ctype: DataType): Boolean = ctype match {
-    case _: NumericType | BooleanType | DateType | TimestampType | StringType | BinaryType => true
-    case _ => false
-  }
-
-  /**
-   * Compute the FIXED_LEN_BYTE_ARRAY length needed to represent a given DECIMAL precision.
-   */
-  private[parquet] val BYTES_FOR_PRECISION = Array.tabulate[Int](38) { precision =>
-    var length = 1
-    while (math.pow(2.0, 8 * length - 1) < math.pow(10.0, precision)) {
-      length += 1
-    }
-    length
-  }
-
-  def convertFromAttributes(attributes: Seq[Attribute]): MessageType = {
-    val converter = new CatalystSchemaConverter()
-    converter.convert(StructType.fromAttributes(attributes))
-  }
-
-  def convertFromString(string: String): Seq[Attribute] = {
-    Try(DataType.fromJson(string)).getOrElse(DataType.fromCaseClassString(string)) match {
-      case s: StructType => s.toAttributes
-      case other => sys.error(s"Can convert $string to row")
-    }
-  }
-
-  def convertToString(schema: Seq[Attribute]): String = {
-    schema.map(_.name).foreach(CatalystSchemaConverter.checkFieldName)
-    StructType.fromAttributes(schema).json
-  }
-
-  def writeMetaData(attributes: Seq[Attribute], origPath: Path, conf: Configuration): Unit = {
-    if (origPath == null) {
-      throw new IllegalArgumentException("Unable to write Parquet metadata: path is null")
-    }
-    val fs = origPath.getFileSystem(conf)
-    if (fs == null) {
-      throw new IllegalArgumentException(
-        s"Unable to write Parquet metadata: path $origPath is incorrectly formatted")
-    }
-    val path = origPath.makeQualified(fs)
-    if (fs.exists(path) && !fs.getFileStatus(path).isDir) {
-      throw new IllegalArgumentException(s"Expected to write to directory $path but found file")
-    }
-    val metadataPath = new Path(path, ParquetFileWriter.PARQUET_METADATA_FILE)
-    if (fs.exists(metadataPath)) {
-      try {
-        fs.delete(metadataPath, true)
-      } catch {
-        case e: IOException =>
-          throw new IOException(s"Unable to delete previous PARQUET_METADATA_FILE at $metadataPath")
-      }
-    }
-    val extraMetadata = new java.util.HashMap[String, String]()
-    extraMetadata.put(
-      CatalystReadSupport.SPARK_METADATA_KEY,
-      ParquetTypesConverter.convertToString(attributes))
-    // TODO: add extra data, e.g., table name, date, etc.?
-
-    val parquetSchema: MessageType = ParquetTypesConverter.convertFromAttributes(attributes)
-    val metaData: FileMetaData = new FileMetaData(
-      parquetSchema,
-      extraMetadata,
-      "Spark")
-
-    ParquetFileWriter.writeMetadataFile(
-      conf,
-      path,
-      Arrays.asList(new Footer(path, new ParquetMetadata(metaData, Collections.emptyList()))))
-  }
-
-  /**
-   * Try to read Parquet metadata at the given Path. We first see if there is a summary file
-   * in the parent directory. If so, this is used. Else we read the actual footer at the given
-   * location.
-   * @param origPath The path at which we expect one (or more) Parquet files.
-   * @param configuration The Hadoop configuration to use.
-   * @return The `ParquetMetadata` containing among other things the schema.
-   */
-  def readMetaData(origPath: Path, configuration: Option[Configuration]): ParquetMetadata = {
-    if (origPath == null) {
-      throw new IllegalArgumentException("Unable to read Parquet metadata: path is null")
-    }
-    val job = new Job()
-    val conf = {
-      // scalastyle:off jobcontext
-      configuration.getOrElse(ContextUtil.getConfiguration(job))
-      // scalastyle:on jobcontext
-    }
-    val fs: FileSystem = origPath.getFileSystem(conf)
-    if (fs == null) {
-      throw new IllegalArgumentException(s"Incorrectly formatted Parquet metadata path $origPath")
-    }
-    val path = origPath.makeQualified(fs)
-
-    val children =
-      fs
-        .globStatus(path)
-        .flatMap { status => if (status.isDir) fs.listStatus(status.getPath) else List(status) }
-        .filterNot { status =>
-          val name = status.getPath.getName
-          (name(0) == '.' || name(0) == '_') && name != ParquetFileWriter.PARQUET_METADATA_FILE
-        }
-
-    // NOTE (lian): Parquet "_metadata" file can be very slow if the file consists of lots of row
-    // groups. Since Parquet schema is replicated among all row groups, we only need to touch a
-    // single row group to read schema related metadata. Notice that we are making assumptions that
-    // all data in a single Parquet file have the same schema, which is normally true.
-    children
-      // Try any non-"_metadata" file first...
-      .find(_.getPath.getName != ParquetFileWriter.PARQUET_METADATA_FILE)
-      // ... and fallback to "_metadata" if no such file exists (which implies the Parquet file is
-      // empty, thus normally the "_metadata" file is expected to be fairly small).
-      .orElse(children.find(_.getPath.getName == ParquetFileWriter.PARQUET_METADATA_FILE))
-      .map(ParquetFileReader.readFooter(conf, _, ParquetMetadataConverter.NO_FILTER))
-      .getOrElse(
-        throw new IllegalArgumentException(s"Could not find Parquet metadata at path $path"))
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
index 7992fd59ff4b..d17671d48a2f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
@@ -24,6 +24,7 @@ import com.clearspring.analytics.stream.cardinality.HyperLogLog
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions.{OpenHashSetUDT, HyperLogLogUDT}
+import org.apache.spark.sql.execution.datasources.parquet.ParquetTest
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
@@ -68,7 +69,7 @@ private[sql] class MyDenseVectorUDT extends UserDefinedType[MyDenseVector] {
   private[spark] override def asNullable: MyDenseVectorUDT = this
 }
 
-class UserDefinedTypeSuite extends QueryTest with SharedSQLContext {
+class UserDefinedTypeSuite extends QueryTest with SharedSQLContext with ParquetTest {
   import testImplicits._
 
   private lazy val pointsRDD = Seq(
@@ -98,17 +99,28 @@ class UserDefinedTypeSuite extends QueryTest with SharedSQLContext {
       Seq(Row(true), Row(true)))
   }
 
-
-  test("UDTs with Parquet") {
-    val tempDir = Utils.createTempDir()
-    tempDir.delete()
-    pointsRDD.write.parquet(tempDir.getCanonicalPath)
+  testStandardAndLegacyModes("UDTs with Parquet") {
+    withTempPath { dir =>
+      val path = dir.getCanonicalPath
+      pointsRDD.write.parquet(path)
+      checkAnswer(
+        sqlContext.read.parquet(path),
+        Seq(
+          Row(1.0, new MyDenseVector(Array(0.1, 1.0))),
+          Row(0.0, new MyDenseVector(Array(0.2, 2.0)))))
+    }
   }
 
-  test("Repartition UDTs with Parquet") {
-    val tempDir = Utils.createTempDir()
-    tempDir.delete()
-    pointsRDD.repartition(1).write.parquet(tempDir.getCanonicalPath)
+  testStandardAndLegacyModes("Repartition UDTs with Parquet") {
+    withTempPath { dir =>
+      val path = dir.getCanonicalPath
+      pointsRDD.repartition(1).write.parquet(path)
+      checkAnswer(
+        sqlContext.read.parquet(path),
+        Seq(
+          Row(1.0, new MyDenseVector(Array(0.1, 1.0))),
+          Row(0.0, new MyDenseVector(Array(0.2, 2.0)))))
+    }
   }
 
   // Tests to make sure that all operators correctly convert types on the way out.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index cd552e83372f..599cf948e76a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -28,10 +28,10 @@ import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.mapreduce.{JobContext, TaskAttemptContext}
 import org.apache.parquet.example.data.simple.SimpleGroup
 import org.apache.parquet.example.data.{Group, GroupWriter}
+import org.apache.parquet.hadoop._
 import org.apache.parquet.hadoop.api.WriteSupport
 import org.apache.parquet.hadoop.api.WriteSupport.WriteContext
-import org.apache.parquet.hadoop.metadata.{BlockMetaData, CompressionCodecName, FileMetaData, ParquetMetadata}
-import org.apache.parquet.hadoop.{Footer, ParquetFileWriter, ParquetOutputCommitter, ParquetWriter}
+import org.apache.parquet.hadoop.metadata.{CompressionCodecName, FileMetaData, ParquetMetadata}
 import org.apache.parquet.io.api.RecordConsumer
 import org.apache.parquet.schema.{MessageType, MessageTypeParser}
 
@@ -99,16 +99,18 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     withSQLConf(SQLConf.PARQUET_BINARY_AS_STRING.key -> "true")(checkParquetFile(data))
   }
 
-  test("fixed-length decimals") {
-    def makeDecimalRDD(decimal: DecimalType): DataFrame =
-      sparkContext
-        .parallelize(0 to 1000)
-        .map(i => Tuple1(i / 100.0))
-        .toDF()
-        // Parquet doesn't allow column names with spaces, have to add an alias here
-        .select($"_1" cast decimal as "dec")
+  testStandardAndLegacyModes("fixed-length decimals") {
+    def makeDecimalRDD(decimal: DecimalType): DataFrame = {
+      sqlContext
+        .range(1000)
+        // Parquet doesn't allow column names with spaces, have to add an alias here.
+        // Minus 500 here so that negative decimals are also tested.
+        .select((('id - 500) / 100.0) cast decimal as 'dec)
+        .coalesce(1)
+    }
 
-    for ((precision, scale) <- Seq((5, 2), (1, 0), (1, 1), (18, 10), (18, 17), (19, 0), (38, 37))) {
+    val combinations = Seq((5, 2), (1, 0), (1, 1), (18, 10), (18, 17), (19, 0), (38, 37))
+    for ((precision, scale) <- combinations) {
       withTempPath { dir =>
         val data = makeDecimalRDD(DecimalType(precision, scale))
         data.write.parquet(dir.getCanonicalPath)
@@ -132,22 +134,22 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
-  test("map") {
+  testStandardAndLegacyModes("map") {
     val data = (1 to 4).map(i => Tuple1(Map(i -> s"val_$i")))
     checkParquetFile(data)
   }
 
-  test("array") {
+  testStandardAndLegacyModes("array") {
     val data = (1 to 4).map(i => Tuple1(Seq(i, i + 1)))
     checkParquetFile(data)
   }
 
-  test("array and double") {
+  testStandardAndLegacyModes("array and double") {
     val data = (1 to 4).map(i => (i.toDouble, Seq(i.toDouble, (i + 1).toDouble)))
     checkParquetFile(data)
   }
 
-  test("struct") {
+  testStandardAndLegacyModes("struct") {
     val data = (1 to 4).map(i => Tuple1((i, s"val_$i")))
     withParquetDataFrame(data) { df =>
       // Structs are converted to `Row`s
@@ -157,7 +159,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
-  test("nested struct with array of array as field") {
+  testStandardAndLegacyModes("nested struct with array of array as field") {
     val data = (1 to 4).map(i => Tuple1((i, Seq(Seq(s"val_$i")))))
     withParquetDataFrame(data) { df =>
       // Structs are converted to `Row`s
@@ -167,7 +169,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
-  test("nested map with struct as value type") {
+  testStandardAndLegacyModes("nested map with struct as value type") {
     val data = (1 to 4).map(i => Tuple1(Map(i -> (i, s"val_$i"))))
     withParquetDataFrame(data) { df =>
       checkAnswer(df, data.map { case Tuple1(m) =>
@@ -205,14 +207,14 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
   }
 
   test("compression codec") {
-    def compressionCodecFor(path: String): String = {
-      val codecs = ParquetTypesConverter
-        .readMetaData(new Path(path), Some(hadoopConfiguration)).getBlocks.asScala
-        .flatMap(_.getColumns.asScala)
-        .map(_.getCodec.name())
-        .distinct
-
-      assert(codecs.size === 1)
+    def compressionCodecFor(path: String, codecName: String): String = {
+      val codecs = for {
+        footer <- readAllFootersWithoutSummaryFiles(new Path(path), hadoopConfiguration)
+        block <- footer.getParquetMetadata.getBlocks.asScala
+        column <- block.getColumns.asScala
+      } yield column.getCodec.name()
+
+      assert(codecs.distinct === Seq(codecName))
       codecs.head
     }
 
@@ -222,7 +224,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       withSQLConf(SQLConf.PARQUET_COMPRESSION.key -> codec.name()) {
         withParquetFile(data) { path =>
           assertResult(sqlContext.conf.parquetCompressionCodec.toUpperCase) {
-            compressionCodecFor(path)
+            compressionCodecFor(path, codec.name())
           }
         }
       }
@@ -278,15 +280,14 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     withTempPath { file =>
       val path = new Path(file.toURI.toString)
       val fs = FileSystem.getLocal(hadoopConfiguration)
-      val attributes = ScalaReflection.attributesFor[(Int, String)]
-      ParquetTypesConverter.writeMetaData(attributes, path, hadoopConfiguration)
+      val schema = StructType.fromAttributes(ScalaReflection.attributesFor[(Int, String)])
+      writeMetadata(schema, path, hadoopConfiguration)
 
       assert(fs.exists(new Path(path, ParquetFileWriter.PARQUET_COMMON_METADATA_FILE)))
       assert(fs.exists(new Path(path, ParquetFileWriter.PARQUET_METADATA_FILE)))
 
-      val metaData = ParquetTypesConverter.readMetaData(path, Some(hadoopConfiguration))
-      val actualSchema = metaData.getFileMetaData.getSchema
-      val expectedSchema = ParquetTypesConverter.convertFromAttributes(attributes)
+      val expectedSchema = new CatalystSchemaConverter().convert(schema)
+      val actualSchema = readFooter(path, hadoopConfiguration).getFileMetaData.getSchema
 
       actualSchema.checkContains(expectedSchema)
       expectedSchema.checkContains(actualSchema)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
index 1c1cfa34ad04..cc02ef81c9f8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
@@ -484,7 +484,7 @@ class ParquetQuerySuite extends QueryTest with ParquetTest with SharedSQLContext
     }
   }
 
-  test("SPARK-10301 requested schema clipping - UDT") {
+  testStandardAndLegacyModes("SPARK-10301 requested schema clipping - UDT") {
     withTempPath { dir =>
       val path = dir.getCanonicalPath
 
@@ -517,6 +517,50 @@ class ParquetQuerySuite extends QueryTest with ParquetTest with SharedSQLContext
         Row(Row(NestedStruct(1, 2L, 3.5D))))
     }
   }
+
+  test("expand UDT in StructType") {
+    val schema = new StructType().add("n", new NestedStructUDT, nullable = true)
+    val expected = new StructType().add("n", new NestedStructUDT().sqlType, nullable = true)
+    assert(CatalystReadSupport.expandUDT(schema) === expected)
+  }
+
+  test("expand UDT in ArrayType") {
+    val schema = new StructType().add(
+      "n",
+      ArrayType(
+        elementType = new NestedStructUDT,
+        containsNull = false),
+      nullable = true)
+
+    val expected = new StructType().add(
+      "n",
+      ArrayType(
+        elementType = new NestedStructUDT().sqlType,
+        containsNull = false),
+      nullable = true)
+
+    assert(CatalystReadSupport.expandUDT(schema) === expected)
+  }
+
+  test("expand UDT in MapType") {
+    val schema = new StructType().add(
+      "n",
+      MapType(
+        keyType = IntegerType,
+        valueType = new NestedStructUDT,
+        valueContainsNull = false),
+      nullable = true)
+
+    val expected = new StructType().add(
+      "n",
+      MapType(
+        keyType = IntegerType,
+        valueType = new NestedStructUDT().sqlType,
+        valueContainsNull = false),
+      nullable = true)
+
+    assert(CatalystReadSupport.expandUDT(schema) === expected)
+  }
 }
 
 object TestingUDT {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
index f17fb36f25fe..60fa81b1ab81 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetSchemaSuite.scala
@@ -357,8 +357,8 @@ class ParquetSchemaSuite extends ParquetSchemaTest {
     val jsonString = """{"type":"struct","fields":[{"name":"c1","type":"integer","nullable":false,"metadata":{}},{"name":"c2","type":"binary","nullable":true,"metadata":{}}]}"""
     // scalastyle:on
 
-    val fromCaseClassString = ParquetTypesConverter.convertFromString(caseClassString)
-    val fromJson = ParquetTypesConverter.convertFromString(jsonString)
+    val fromCaseClassString = StructType.fromString(caseClassString)
+    val fromJson = StructType.fromString(jsonString)
 
     (fromCaseClassString, fromJson).zipped.foreach { (a, b) =>
       assert(a.name == b.name)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
index 442fafb12f20..9840ad919e51 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
@@ -19,11 +19,19 @@ package org.apache.spark.sql.execution.datasources.parquet
 
 import java.io.File
 
+import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.TypeTag
 
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.fs.Path
+import org.apache.parquet.format.converter.ParquetMetadataConverter
+import org.apache.parquet.hadoop.metadata.{BlockMetaData, FileMetaData, ParquetMetadata}
+import org.apache.parquet.hadoop.{Footer, ParquetFileReader, ParquetFileWriter}
+
 import org.apache.spark.sql.test.SQLTestUtils
-import org.apache.spark.sql.{DataFrame, SaveMode, SQLContext}
+import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.{DataFrame, SQLConf, SaveMode}
 
 /**
  * A helper trait that provides convenient facilities for Parquet testing.
@@ -97,4 +105,38 @@ private[sql] trait ParquetTest extends SQLTestUtils {
     assert(partDir.mkdirs(), s"Couldn't create directory $partDir")
     partDir
   }
+
+  protected def writeMetadata(
+      schema: StructType, path: Path, configuration: Configuration): Unit = {
+    val parquetSchema = new CatalystSchemaConverter().convert(schema)
+    val extraMetadata = Map(CatalystReadSupport.SPARK_METADATA_KEY -> schema.json).asJava
+    val createdBy = s"Apache Spark ${org.apache.spark.SPARK_VERSION}"
+    val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, createdBy)
+    val parquetMetadata = new ParquetMetadata(fileMetadata, Seq.empty[BlockMetaData].asJava)
+    val footer = new Footer(path, parquetMetadata)
+    ParquetFileWriter.writeMetadataFile(configuration, path, Seq(footer).asJava)
+  }
+
+  protected def readAllFootersWithoutSummaryFiles(
+      path: Path, configuration: Configuration): Seq[Footer] = {
+    val fs = path.getFileSystem(configuration)
+    ParquetFileReader.readAllFootersInParallel(configuration, fs.getFileStatus(path)).asScala.toSeq
+  }
+
+  protected def readFooter(path: Path, configuration: Configuration): ParquetMetadata = {
+    ParquetFileReader.readFooter(
+      configuration,
+      new Path(path, ParquetFileWriter.PARQUET_METADATA_FILE),
+      ParquetMetadataConverter.NO_FILTER)
+  }
+
+  protected def testStandardAndLegacyModes(testName: String)(f: => Unit): Unit = {
+    test(s"Standard mode - $testName") {
+      withSQLConf(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "false") { f }
+    }
+
+    test(s"Legacy mode - $testName") {
+      withSQLConf(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "true") { f }
+    }
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveMetastoreCatalogSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveMetastoreCatalogSuite.scala
index 107457f79ec0..d63f3d399652 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveMetastoreCatalogSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveMetastoreCatalogSuite.scala
@@ -20,11 +20,11 @@ package org.apache.spark.sql.hive
 import java.io.File
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.{QueryTest, Row, SaveMode}
 import org.apache.spark.sql.hive.client.{ExternalTable, ManagedTable}
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.sql.test.{ExamplePointUDT, SQLTestUtils}
 import org.apache.spark.sql.types.{DecimalType, StringType, StructType}
+import org.apache.spark.sql.{SQLConf, QueryTest, Row, SaveMode}
 
 class HiveMetastoreCatalogSuite extends SparkFunSuite with TestHiveSingleton {
   import hiveContext.implicits._
@@ -74,11 +74,13 @@ class DataSourceWithHiveMetastoreCatalogSuite
   ).foreach { case (provider, (inputFormat, outputFormat, serde)) =>
     test(s"Persist non-partitioned $provider relation into metastore as managed table") {
       withTable("t") {
-        testDF
-          .write
-          .mode(SaveMode.Overwrite)
-          .format(provider)
-          .saveAsTable("t")
+        withSQLConf(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "true") {
+          testDF
+            .write
+            .mode(SaveMode.Overwrite)
+            .format(provider)
+            .saveAsTable("t")
+        }
 
         val hiveTable = catalog.client.getTable("default", "t")
         assert(hiveTable.inputFormat === Some(inputFormat))
@@ -102,12 +104,14 @@ class DataSourceWithHiveMetastoreCatalogSuite
         withTable("t") {
           val path = dir.getCanonicalFile
 
-          testDF
-            .write
-            .mode(SaveMode.Overwrite)
-            .format(provider)
-            .option("path", path.toString)
-            .saveAsTable("t")
+          withSQLConf(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "true") {
+            testDF
+              .write
+              .mode(SaveMode.Overwrite)
+              .format(provider)
+              .option("path", path.toString)
+              .saveAsTable("t")
+          }
 
           val hiveTable = catalog.client.getTable("default", "t")
           assert(hiveTable.inputFormat === Some(inputFormat))

From 84ea287178247c163226e835490c9c70b17d8d3b Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 8 Oct 2015 17:25:14 -0700
Subject: [PATCH 190/896] [SPARK-10914] UnsafeRow serialization breaks when two
 machines have different Oops size.

UnsafeRow contains 3 pieces of information when pointing to some data in memory (an object, a base offset, and length). When the row is serialized with Java/Kryo serialization, the object layout in memory can change if two machines have different pointer width (Oops in JVM).

To reproduce, launch Spark using

MASTER=local-cluster[2,1,1024] bin/spark-shell --conf "spark.executor.extraJavaOptions=-XX:-UseCompressedOops"

And then run the following

scala> sql("select 1 xx").collect()

Author: Reynold Xin <rxin@databricks.com>

Closes #9030 from rxin/SPARK-10914.
---
 .../sql/catalyst/expressions/UnsafeRow.java   | 47 +++++++++++++++++--
 .../org/apache/spark/sql/UnsafeRowSuite.scala | 29 +++++++++++-
 2 files changed, 72 insertions(+), 4 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index e8ac2999c2d2..5af7ed5d6eb6 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -17,8 +17,7 @@
 
 package org.apache.spark.sql.catalyst.expressions;
 
-import java.io.IOException;
-import java.io.OutputStream;
+import java.io.*;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.util.Arrays;
@@ -26,6 +25,11 @@
 import java.util.HashSet;
 import java.util.Set;
 
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.KryoSerializable;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+
 import org.apache.spark.sql.types.*;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
@@ -35,6 +39,7 @@
 import org.apache.spark.unsafe.types.UTF8String;
 
 import static org.apache.spark.sql.types.DataTypes.*;
+import static org.apache.spark.unsafe.Platform.BYTE_ARRAY_OFFSET;
 
 /**
  * An Unsafe implementation of Row which is backed by raw memory instead of Java objects.
@@ -52,7 +57,7 @@
  *
  * Instances of `UnsafeRow` act as pointers to row data stored in this format.
  */
-public final class UnsafeRow extends MutableRow {
+public final class UnsafeRow extends MutableRow implements Externalizable, KryoSerializable {
 
   //////////////////////////////////////////////////////////////////////////////
   // Static methods
@@ -596,4 +601,40 @@ public boolean anyNull() {
   public void writeToMemory(Object target, long targetOffset) {
     Platform.copyMemory(baseObject, baseOffset, target, targetOffset, sizeInBytes);
   }
+
+  @Override
+  public void writeExternal(ObjectOutput out) throws IOException {
+    byte[] bytes = getBytes();
+    out.writeInt(bytes.length);
+    out.writeInt(this.numFields);
+    out.write(bytes);
+  }
+
+  @Override
+  public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
+    this.baseOffset = BYTE_ARRAY_OFFSET;
+    this.sizeInBytes = in.readInt();
+    this.numFields = in.readInt();
+    this.bitSetWidthInBytes = calculateBitSetWidthInBytes(numFields);
+    this.baseObject = new byte[sizeInBytes];
+    in.readFully((byte[]) baseObject);
+  }
+
+  @Override
+  public void write(Kryo kryo, Output out) {
+    byte[] bytes = getBytes();
+    out.writeInt(bytes.length);
+    out.writeInt(this.numFields);
+    out.write(bytes);
+  }
+
+  @Override
+  public void read(Kryo kryo, Input in) {
+    this.baseOffset = BYTE_ARRAY_OFFSET;
+    this.sizeInBytes = in.readInt();
+    this.numFields = in.readInt();
+    this.bitSetWidthInBytes = calculateBitSetWidthInBytes(numFields);
+    this.baseObject = new byte[sizeInBytes];
+    in.read((byte[]) baseObject);
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
index 944d4e11348c..7d1ee39d4b53 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
@@ -19,7 +19,8 @@ package org.apache.spark.sql
 
 import java.io.ByteArrayOutputStream
 
-import org.apache.spark.SparkFunSuite
+import org.apache.spark.{SparkConf, SparkFunSuite}
+import org.apache.spark.serializer.{KryoSerializer, JavaSerializer}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
 import org.apache.spark.sql.types._
@@ -29,6 +30,32 @@ import org.apache.spark.unsafe.types.UTF8String
 
 class UnsafeRowSuite extends SparkFunSuite {
 
+  test("UnsafeRow Java serialization") {
+    // serializing an UnsafeRow pointing to a large buffer should only serialize the relevant data
+    val data = new Array[Byte](1024)
+    val row = new UnsafeRow
+    row.pointTo(data, 1, 16)
+    row.setLong(0, 19285)
+
+    val ser = new JavaSerializer(new SparkConf).newInstance()
+    val row1 = ser.deserialize[UnsafeRow](ser.serialize(row))
+    assert(row1.getLong(0) == 19285)
+    assert(row1.getBaseObject().asInstanceOf[Array[Byte]].length == 16)
+  }
+
+  test("UnsafeRow Kryo serialization") {
+    // serializing an UnsafeRow pointing to a large buffer should only serialize the relevant data
+    val data = new Array[Byte](1024)
+    val row = new UnsafeRow
+    row.pointTo(data, 1, 16)
+    row.setLong(0, 19285)
+
+    val ser = new KryoSerializer(new SparkConf).newInstance()
+    val row1 = ser.deserialize[UnsafeRow](ser.serialize(row))
+    assert(row1.getLong(0) == 19285)
+    assert(row1.getBaseObject().asInstanceOf[Array[Byte]].length == 16)
+  }
+
   test("bitset width calculation") {
     assert(UnsafeRow.calculateBitSetWidthInBytes(0) === 0)
     assert(UnsafeRow.calculateBitSetWidthInBytes(1) === 8)

From 3390b400d04e40f767d8a51f1078fcccb4e64abd Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 8 Oct 2015 17:34:24 -0700
Subject: [PATCH 191/896] [SPARK-10810] [SPARK-10902] [SQL] Improve session
 management in SQL

This PR improve the sessions management by replacing the thread-local based to one SQLContext per session approach, introduce separated temporary tables and UDFs/UDAFs for each session.

A new session of SQLContext could be created by:

1) create an new SQLContext
2) call newSession() on existing SQLContext

For HiveContext, in order to reduce the cost for each session, the classloader and Hive client are shared across multiple sessions (created by newSession).

CacheManager is also shared by multiple sessions, so cache a table multiple times in different sessions will not cause multiple copies of in-memory cache.

Added jars are still shared by all the sessions, because SparkContext does not support sessions.

cc marmbrus yhuai rxin

Author: Davies Liu <davies@databricks.com>

Closes #8909 from davies/sessions.
---
 project/MimaExcludes.scala                    |  22 ++-
 .../catalyst/analysis/FunctionRegistry.scala  |  28 ++-
 .../org/apache/spark/sql/SQLContext.scala     | 164 ++++++++++--------
 .../spark/sql/execution/CacheManager.scala    |  14 +-
 .../apache/spark/sql/SQLContextSuite.scala    |  59 ++++---
 .../spark/sql/test/TestSQLContext.scala       |  21 +--
 .../SparkExecuteStatementOperation.scala      |  76 ++------
 .../thriftserver/SparkSQLSessionManager.scala |   9 +-
 .../server/SparkSQLOperationManager.scala     |   5 +-
 .../sql/hive/thriftserver/CliSuite.scala      |   8 +-
 .../HiveThriftServer2Suites.scala             |  76 ++++----
 .../apache/spark/sql/hive/HiveContext.scala   | 155 +++++++++++------
 .../org/apache/spark/sql/hive/HiveQl.scala    |  28 +--
 .../sql/hive/client/ClientInterface.scala     |   9 +
 .../spark/sql/hive/client/ClientWrapper.scala |  85 +++++----
 .../hive/client/IsolatedClientLoader.scala    | 107 +++++++-----
 .../spark/sql/hive/execution/commands.scala   |  27 +--
 .../apache/spark/sql/hive/test/TestHive.scala |  27 +--
 .../apache/spark/sql/hive/HiveQlSuite.scala   |  13 +-
 .../spark/sql/hive/client/VersionsSuite.scala |   6 +-
 .../sql/hive/execution/HiveQuerySuite.scala   |  32 ++++
 .../sql/hive/execution/SQLQuerySuite.scala    |   9 +-
 22 files changed, 540 insertions(+), 440 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 2d4d146f5133..08e4a449cf76 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -79,7 +79,27 @@ object MimaExcludes {
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.ml.regression.LeastSquaresAggregator.add"),
         ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.ml.regression.LeastSquaresCostFun.this")
+          "org.apache.spark.ml.regression.LeastSquaresCostFun.this"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.clearLastInstantiatedContext"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.setLastInstantiatedContext"),
+        ProblemFilters.exclude[MissingClassProblem](
+          "org.apache.spark.sql.SQLContext$SQLSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.detachSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.tlSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.defaultSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.currentSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.openSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.setSession"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.SQLContext.createSession")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index e6122d92b763..ba77b70a378a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -51,23 +51,37 @@ class SimpleFunctionRegistry extends FunctionRegistry {
   private val functionBuilders =
     StringKeyHashMap[(ExpressionInfo, FunctionBuilder)](caseSensitive = false)
 
-  override def registerFunction(name: String, info: ExpressionInfo, builder: FunctionBuilder)
-  : Unit = {
+  override def registerFunction(
+      name: String,
+      info: ExpressionInfo,
+      builder: FunctionBuilder): Unit = synchronized {
     functionBuilders.put(name, (info, builder))
   }
 
   override def lookupFunction(name: String, children: Seq[Expression]): Expression = {
-    val func = functionBuilders.get(name).map(_._2).getOrElse {
-      throw new AnalysisException(s"undefined function $name")
+    val func = synchronized {
+      functionBuilders.get(name).map(_._2).getOrElse {
+        throw new AnalysisException(s"undefined function $name")
+      }
     }
     func(children)
   }
 
-  override def listFunction(): Seq[String] = functionBuilders.iterator.map(_._1).toList.sorted
+  override def listFunction(): Seq[String] = synchronized {
+    functionBuilders.iterator.map(_._1).toList.sorted
+  }
 
-  override def lookupFunction(name: String): Option[ExpressionInfo] = {
+  override def lookupFunction(name: String): Option[ExpressionInfo] = synchronized {
     functionBuilders.get(name).map(_._1)
   }
+
+  def copy(): SimpleFunctionRegistry = synchronized {
+    val registry = new SimpleFunctionRegistry
+    functionBuilders.iterator.foreach { case (name, (info, builder)) =>
+      registry.registerFunction(name, info, builder)
+    }
+    registry
+  }
 }
 
 /**
@@ -257,7 +271,7 @@ object FunctionRegistry {
     expression[InputFileName]("input_file_name")
   )
 
-  val builtin: FunctionRegistry = {
+  val builtin: SimpleFunctionRegistry = {
     val fr = new SimpleFunctionRegistry
     expressions.foreach { case (name, (info, builder)) => fr.registerFunction(name, info, builder) }
     fr
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index cb0a3e361c97..2bdfd82af0ad 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -30,6 +30,7 @@ import org.apache.spark.SparkContext
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.api.java.{JavaRDD, JavaSparkContext}
 import org.apache.spark.rdd.RDD
+import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationEnd}
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.errors.DialectException
@@ -38,15 +39,12 @@ import org.apache.spark.sql.catalyst.optimizer.{DefaultOptimizer, Optimizer}
 import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, LogicalPlan}
 import org.apache.spark.sql.catalyst.rules.RuleExecutor
 import org.apache.spark.sql.catalyst.{InternalRow, ParserDialect, _}
-import org.apache.spark.sql.execution.{Filter, _}
-import org.apache.spark.sql.{execution => sparkexecution}
-import org.apache.spark.sql.execution._
-import org.apache.spark.sql.sources._
 import org.apache.spark.sql.execution._
 import org.apache.spark.sql.execution.datasources._
 import org.apache.spark.sql.execution.ui.{SQLListener, SQLTab}
 import org.apache.spark.sql.sources.BaseRelation
 import org.apache.spark.sql.types._
+import org.apache.spark.sql.{execution => sparkexecution}
 import org.apache.spark.util.Utils
 
 /**
@@ -64,18 +62,30 @@ import org.apache.spark.util.Utils
  *
  * @since 1.0.0
  */
-class SQLContext(@transient val sparkContext: SparkContext)
-  extends org.apache.spark.Logging
-  with Serializable {
+class SQLContext private[sql](
+    @transient val sparkContext: SparkContext,
+    @transient protected[sql] val cacheManager: CacheManager)
+  extends org.apache.spark.Logging with Serializable {
 
   self =>
 
+  def this(sparkContext: SparkContext) = this(sparkContext, new CacheManager)
   def this(sparkContext: JavaSparkContext) = this(sparkContext.sc)
 
+  /**
+   * Returns a SQLContext as new session, with separated SQL configurations, temporary tables,
+   * registered functions, but sharing the same SparkContext and CacheManager.
+   *
+   * @since 1.6.0
+   */
+  def newSession(): SQLContext = {
+    new SQLContext(sparkContext, cacheManager)
+  }
+
   /**
    * @return Spark SQL configuration
    */
-  protected[sql] def conf = currentSession().conf
+  protected[sql] lazy val conf = new SQLConf
 
   // `listener` should be only used in the driver
   @transient private[sql] val listener = new SQLListener(this)
@@ -142,13 +152,11 @@ class SQLContext(@transient val sparkContext: SparkContext)
    */
   def getAllConfs: immutable.Map[String, String] = conf.getAllConfs
 
-  // TODO how to handle the temp table per user session?
   @transient
   protected[sql] lazy val catalog: Catalog = new SimpleCatalog(conf)
 
-  // TODO how to handle the temp function per user session?
   @transient
-  protected[sql] lazy val functionRegistry: FunctionRegistry = FunctionRegistry.builtin
+  protected[sql] lazy val functionRegistry: FunctionRegistry = FunctionRegistry.builtin.copy()
 
   @transient
   protected[sql] lazy val analyzer: Analyzer =
@@ -198,20 +206,19 @@ class SQLContext(@transient val sparkContext: SparkContext)
   protected[sql] def executePlan(plan: LogicalPlan) =
     new sparkexecution.QueryExecution(this, plan)
 
-  @transient
-  protected[sql] val tlSession = new ThreadLocal[SQLSession]() {
-    override def initialValue: SQLSession = defaultSession
-  }
-
-  @transient
-  protected[sql] val defaultSession = createSession()
-
   protected[sql] def dialectClassName = if (conf.dialect == "sql") {
     classOf[DefaultParserDialect].getCanonicalName
   } else {
     conf.dialect
   }
 
+  /**
+   * Add a jar to SQLContext
+   */
+  protected[sql] def addJar(path: String): Unit = {
+    sparkContext.addJar(path)
+  }
+
   {
     // We extract spark sql settings from SparkContext's conf and put them to
     // Spark SQL's conf.
@@ -236,9 +243,6 @@ class SQLContext(@transient val sparkContext: SparkContext)
     }
   }
 
-  @transient
-  protected[sql] val cacheManager = new CacheManager(this)
-
   /**
    * :: Experimental ::
    * A collection of methods that are considered experimental, but can be used to hook into
@@ -300,21 +304,25 @@ class SQLContext(@transient val sparkContext: SparkContext)
    * @group cachemgmt
    * @since 1.3.0
    */
-  def isCached(tableName: String): Boolean = cacheManager.isCached(tableName)
+  def isCached(tableName: String): Boolean = {
+    cacheManager.lookupCachedData(table(tableName)).nonEmpty
+  }
 
   /**
    * Caches the specified table in-memory.
    * @group cachemgmt
    * @since 1.3.0
    */
-  def cacheTable(tableName: String): Unit = cacheManager.cacheTable(tableName)
+  def cacheTable(tableName: String): Unit = {
+    cacheManager.cacheQuery(table(tableName), Some(tableName))
+  }
 
   /**
    * Removes the specified table from the in-memory cache.
    * @group cachemgmt
    * @since 1.3.0
    */
-  def uncacheTable(tableName: String): Unit = cacheManager.uncacheTable(tableName)
+  def uncacheTable(tableName: String): Unit = cacheManager.uncacheQuery(table(tableName))
 
   /**
    * Removes all cached tables from the in-memory cache.
@@ -830,36 +838,6 @@ class SQLContext(@transient val sparkContext: SparkContext)
     )
   }
 
-  protected[sql] def openSession(): SQLSession = {
-    detachSession()
-    val session = createSession()
-    tlSession.set(session)
-
-    session
-  }
-
-  protected[sql] def currentSession(): SQLSession = {
-    tlSession.get()
-  }
-
-  protected[sql] def createSession(): SQLSession = {
-    new this.SQLSession()
-  }
-
-  protected[sql] def detachSession(): Unit = {
-    tlSession.remove()
-  }
-
-  protected[sql] def setSession(session: SQLSession): Unit = {
-    detachSession()
-    tlSession.set(session)
-  }
-
-  protected[sql] class SQLSession {
-    // Note that this is a lazy val so we can override the default value in subclasses.
-    protected[sql] lazy val conf: SQLConf = new SQLConf
-  }
-
   @deprecated("use org.apache.spark.sql.QueryExecution", "1.6.0")
   protected[sql] class QueryExecution(logical: LogicalPlan)
     extends sparkexecution.QueryExecution(this, logical)
@@ -1196,46 +1174,90 @@ class SQLContext(@transient val sparkContext: SparkContext)
   // Register a succesfully instantiatd context to the singleton. This should be at the end of
   // the class definition so that the singleton is updated only if there is no exception in the
   // construction of the instance.
-  SQLContext.setLastInstantiatedContext(self)
+  sparkContext.addSparkListener(new SparkListener {
+    override def onApplicationEnd(applicationEnd: SparkListenerApplicationEnd): Unit = {
+      SQLContext.clearInstantiatedContext(self)
+    }
+  })
+
+  SQLContext.setInstantiatedContext(self)
 }
 
 /**
  * This SQLContext object contains utility functions to create a singleton SQLContext instance,
- * or to get the last created SQLContext instance.
+ * or to get the created SQLContext instance.
+ *
+ * It also provides utility functions to support preference for threads in multiple sessions
+ * scenario, setActive could set a SQLContext for current thread, which will be returned by
+ * getOrCreate instead of the global one.
  */
 object SQLContext {
 
-  private val INSTANTIATION_LOCK = new Object()
+  /**
+   * The active SQLContext for the current thread.
+   */
+  private val activeContext: InheritableThreadLocal[SQLContext] =
+    new InheritableThreadLocal[SQLContext]
 
   /**
-   * Reference to the last created SQLContext.
+   * Reference to the created SQLContext.
    */
-  @transient private val lastInstantiatedContext = new AtomicReference[SQLContext]()
+  @transient private val instantiatedContext = new AtomicReference[SQLContext]()
 
   /**
    * Get the singleton SQLContext if it exists or create a new one using the given SparkContext.
+   *
    * This function can be used to create a singleton SQLContext object that can be shared across
    * the JVM.
+   *
+   * If there is an active SQLContext for current thread, it will be returned instead of the global
+   * one.
+   *
+   * @since 1.5.0
    */
   def getOrCreate(sparkContext: SparkContext): SQLContext = {
-    INSTANTIATION_LOCK.synchronized {
-      if (lastInstantiatedContext.get() == null) {
+    val ctx = activeContext.get()
+    if (ctx != null) {
+      return ctx
+    }
+
+    synchronized {
+      val ctx = instantiatedContext.get()
+      if (ctx == null) {
         new SQLContext(sparkContext)
+      } else {
+        ctx
       }
     }
-    lastInstantiatedContext.get()
   }
 
-  private[sql] def clearLastInstantiatedContext(): Unit = {
-    INSTANTIATION_LOCK.synchronized {
-      lastInstantiatedContext.set(null)
-    }
+  private[sql] def clearInstantiatedContext(sqlContext: SQLContext): Unit = {
+    instantiatedContext.compareAndSet(sqlContext, null)
   }
 
-  private[sql] def setLastInstantiatedContext(sqlContext: SQLContext): Unit = {
-    INSTANTIATION_LOCK.synchronized {
-      lastInstantiatedContext.set(sqlContext)
-    }
+  private[sql] def setInstantiatedContext(sqlContext: SQLContext): Unit = {
+    instantiatedContext.compareAndSet(null, sqlContext)
+  }
+
+  /**
+   * Changes the SQLContext that will be returned in this thread and its children when
+   * SQLContext.getOrCreate() is called. This can be used to ensure that a given thread receives
+   * a SQLContext with an isolated session, instead of the global (first created) context.
+   *
+   * @since 1.6.0
+   */
+  def setActive(sqlContext: SQLContext): Unit = {
+    activeContext.set(sqlContext)
+  }
+
+  /**
+   * Clears the active SQLContext for current thread. Subsequent calls to getOrCreate will
+   * return the first created context instead of a thread-local override.
+   *
+   * @since 1.6.0
+   */
+  def clearActive(): Unit = {
+    activeContext.remove()
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
index d3e5c378d037..f85aeb1b0269 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
@@ -20,9 +20,9 @@ package org.apache.spark.sql.execution
 import java.util.concurrent.locks.ReentrantReadWriteLock
 
 import org.apache.spark.Logging
+import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.columnar.InMemoryRelation
-import org.apache.spark.sql.{DataFrame, SQLContext}
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.storage.StorageLevel.MEMORY_AND_DISK
 
@@ -37,7 +37,7 @@ private[sql] case class CachedData(plan: LogicalPlan, cachedRepresentation: InMe
  *
  * Internal to Spark SQL.
  */
-private[sql] class CacheManager(sqlContext: SQLContext) extends Logging {
+private[sql] class CacheManager extends Logging {
 
   @transient
   private val cachedData = new scala.collection.mutable.ArrayBuffer[CachedData]
@@ -45,15 +45,6 @@ private[sql] class CacheManager(sqlContext: SQLContext) extends Logging {
   @transient
   private val cacheLock = new ReentrantReadWriteLock
 
-  /** Returns true if the table is currently cached in-memory. */
-  def isCached(tableName: String): Boolean = lookupCachedData(sqlContext.table(tableName)).nonEmpty
-
-  /** Caches the specified table in-memory. */
-  def cacheTable(tableName: String): Unit = cacheQuery(sqlContext.table(tableName), Some(tableName))
-
-  /** Removes the specified table from the in-memory cache. */
-  def uncacheTable(tableName: String): Unit = uncacheQuery(sqlContext.table(tableName))
-
   /** Acquires a read lock on the cache for the duration of `f`. */
   private def readLock[A](f: => A): A = {
     val lock = cacheLock.readLock()
@@ -96,6 +87,7 @@ private[sql] class CacheManager(sqlContext: SQLContext) extends Logging {
     if (lookupCachedData(planToCache).nonEmpty) {
       logWarning("Asked to cache already cached data.")
     } else {
+      val sqlContext = query.sqlContext
       cachedData +=
         CachedData(
           planToCache,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLContextSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLContextSuite.scala
index dd88ae3700ab..1994dacfc4df 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLContextSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLContextSuite.scala
@@ -17,33 +17,52 @@
 
 package org.apache.spark.sql
 
-import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.{SharedSparkContext, SparkFunSuite}
 
-class SQLContextSuite extends SparkFunSuite with SharedSQLContext {
-
-  override def afterAll(): Unit = {
-    try {
-      SQLContext.setLastInstantiatedContext(sqlContext)
-    } finally {
-      super.afterAll()
-    }
-  }
+class SQLContextSuite extends SparkFunSuite with SharedSparkContext{
 
   test("getOrCreate instantiates SQLContext") {
-    SQLContext.clearLastInstantiatedContext()
-    val sqlContext = SQLContext.getOrCreate(sparkContext)
+    val sqlContext = SQLContext.getOrCreate(sc)
     assert(sqlContext != null, "SQLContext.getOrCreate returned null")
-    assert(SQLContext.getOrCreate(sparkContext).eq(sqlContext),
+    assert(SQLContext.getOrCreate(sc).eq(sqlContext),
       "SQLContext created by SQLContext.getOrCreate not returned by SQLContext.getOrCreate")
   }
 
-  test("getOrCreate gets last explicitly instantiated SQLContext") {
-    SQLContext.clearLastInstantiatedContext()
-    val sqlContext = new SQLContext(sparkContext)
-    assert(SQLContext.getOrCreate(sparkContext) != null,
-      "SQLContext.getOrCreate after explicitly created SQLContext returned null")
-    assert(SQLContext.getOrCreate(sparkContext).eq(sqlContext),
+  test("getOrCreate return the original SQLContext") {
+    val sqlContext = SQLContext.getOrCreate(sc)
+    val newSession = sqlContext.newSession()
+    assert(SQLContext.getOrCreate(sc).eq(sqlContext),
       "SQLContext.getOrCreate after explicitly created SQLContext did not return the context")
+    SQLContext.setActive(newSession)
+    assert(SQLContext.getOrCreate(sc).eq(newSession),
+      "SQLContext.getOrCreate after explicitly setActive() did not return the active context")
+  }
+
+  test("Sessions of SQLContext") {
+    val sqlContext = SQLContext.getOrCreate(sc)
+    val session1 = sqlContext.newSession()
+    val session2 = sqlContext.newSession()
+
+    // all have the default configurations
+    val key = SQLConf.SHUFFLE_PARTITIONS.key
+    assert(session1.getConf(key) === session2.getConf(key))
+    session1.setConf(key, "1")
+    session2.setConf(key, "2")
+    assert(session1.getConf(key) === "1")
+    assert(session2.getConf(key) === "2")
+
+    // temporary table should not be shared
+    val df = session1.range(10)
+    df.registerTempTable("test1")
+    assert(session1.tableNames().contains("test1"))
+    assert(!session2.tableNames().contains("test1"))
+
+    // UDF should not be shared
+    def myadd(a: Int, b: Int): Int = a + b
+    session1.udf.register[Int, Int, Int]("myadd", myadd)
+    session1.sql("select myadd(1, 2)").explain()
+    intercept[AnalysisException] {
+      session2.sql("select myadd(1, 2)").explain()
+    }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/TestSQLContext.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/TestSQLContext.scala
index 10e633f3cde4..c89a1516503e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/test/TestSQLContext.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/test/TestSQLContext.scala
@@ -31,23 +31,16 @@ private[sql] class TestSQLContext(sc: SparkContext) extends SQLContext(sc) { sel
       new SparkConf().set("spark.sql.testkey", "true")))
   }
 
-  // Make sure we set those test specific confs correctly when we create
-  // the SQLConf as well as when we call clear.
-  protected[sql] override def createSession(): SQLSession = new this.SQLSession()
+  protected[sql] override lazy val conf: SQLConf = new SQLConf {
 
-  /** A special [[SQLSession]] that uses fewer shuffle partitions than normal. */
-  protected[sql] class SQLSession extends super.SQLSession {
-    protected[sql] override lazy val conf: SQLConf = new SQLConf {
+    clear()
 
-      clear()
+    override def clear(): Unit = {
+      super.clear()
 
-      override def clear(): Unit = {
-        super.clear()
-
-        // Make sure we start with the default test configs even after clear
-        TestSQLContext.overrideConfs.map {
-          case (key, value) => setConfString(key, value)
-        }
+      // Make sure we start with the default test configs even after clear
+      TestSQLContext.overrideConfs.map {
+        case (key, value) => setConfString(key, value)
       }
     }
   }
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
index 306f98bcb534..719b03e1c7c7 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
@@ -20,19 +20,15 @@ package org.apache.spark.sql.hive.thriftserver
 import java.security.PrivilegedExceptionAction
 import java.sql.{Date, Timestamp}
 import java.util.concurrent.RejectedExecutionException
-import java.util.{Arrays, Map => JMap, UUID}
+import java.util.{Arrays, UUID, Map => JMap}
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.{ArrayBuffer, Map => SMap}
 import scala.util.control.NonFatal
 
-import org.apache.hadoop.hive.conf.HiveConf
 import org.apache.hadoop.hive.metastore.api.FieldSchema
-import org.apache.hive.service.cli._
-import org.apache.hadoop.hive.ql.metadata.Hive
-import org.apache.hadoop.hive.ql.metadata.HiveException
-import org.apache.hadoop.hive.ql.session.SessionState
 import org.apache.hadoop.hive.shims.Utils
+import org.apache.hive.service.cli._
 import org.apache.hive.service.cli.operation.ExecuteStatementOperation
 import org.apache.hive.service.cli.session.HiveSession
 
@@ -40,7 +36,7 @@ import org.apache.spark.Logging
 import org.apache.spark.sql.execution.SetCommand
 import org.apache.spark.sql.hive.{HiveContext, HiveMetastoreTypes}
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.{DataFrame, Row => SparkRow, SQLConf}
+import org.apache.spark.sql.{DataFrame, SQLConf, Row => SparkRow}
 
 
 private[hive] class SparkExecuteStatementOperation(
@@ -143,30 +139,15 @@ private[hive] class SparkExecuteStatementOperation(
     if (!runInBackground) {
       runInternal()
     } else {
-      val parentSessionState = SessionState.get()
-      val hiveConf = getConfigForOperation()
       val sparkServiceUGI = Utils.getUGI()
-      val sessionHive = getCurrentHive()
-      val currentSqlSession = hiveContext.currentSession
 
       // Runnable impl to call runInternal asynchronously,
       // from a different thread
       val backgroundOperation = new Runnable() {
 
         override def run(): Unit = {
-          val doAsAction = new PrivilegedExceptionAction[Object]() {
-            override def run(): Object = {
-
-              // User information is part of the metastore client member in Hive
-              hiveContext.setSession(currentSqlSession)
-              // Always use the latest class loader provided by executionHive's state.
-              val executionHiveClassLoader =
-                hiveContext.executionHive.state.getConf.getClassLoader
-              sessionHive.getConf.setClassLoader(executionHiveClassLoader)
-              parentSessionState.getConf.setClassLoader(executionHiveClassLoader)
-
-              Hive.set(sessionHive)
-              SessionState.setCurrentSessionState(parentSessionState)
+          val doAsAction = new PrivilegedExceptionAction[Unit]() {
+            override def run(): Unit = {
               try {
                 runInternal()
               } catch {
@@ -174,7 +155,6 @@ private[hive] class SparkExecuteStatementOperation(
                   setOperationException(e)
                   log.error("Error running hive query: ", e)
               }
-              return null
             }
           }
 
@@ -191,7 +171,7 @@ private[hive] class SparkExecuteStatementOperation(
       try {
         // This submit blocks if no background threads are available to run this operation
         val backgroundHandle =
-          getParentSession().getSessionManager().submitBackgroundOperation(backgroundOperation)
+          parentSession.getSessionManager().submitBackgroundOperation(backgroundOperation)
         setBackgroundHandle(backgroundHandle)
       } catch {
         case rejected: RejectedExecutionException =>
@@ -210,6 +190,11 @@ private[hive] class SparkExecuteStatementOperation(
     statementId = UUID.randomUUID().toString
     logInfo(s"Running query '$statement' with $statementId")
     setState(OperationState.RUNNING)
+    // Always use the latest class loader provided by executionHive's state.
+    val executionHiveClassLoader =
+      hiveContext.executionHive.state.getConf.getClassLoader
+    Thread.currentThread().setContextClassLoader(executionHiveClassLoader)
+
     HiveThriftServer2.listener.onStatementStart(
       statementId,
       parentSession.getSessionHandle.getSessionId.toString,
@@ -279,43 +264,4 @@ private[hive] class SparkExecuteStatementOperation(
       }
     }
   }
-
-  /**
-   * If there are query specific settings to overlay, then create a copy of config
-   * There are two cases we need to clone the session config that's being passed to hive driver
-   * 1. Async query -
-   *    If the client changes a config setting, that shouldn't reflect in the execution
-   *    already underway
-   * 2. confOverlay -
-   *    The query specific settings should only be applied to the query config and not session
-   * @return new configuration
-   * @throws HiveSQLException
-   */
-  private def getConfigForOperation(): HiveConf = {
-    var sqlOperationConf = getParentSession().getHiveConf()
-    if (!getConfOverlay().isEmpty() || runInBackground) {
-      // clone the partent session config for this query
-      sqlOperationConf = new HiveConf(sqlOperationConf)
-
-      // apply overlay query specific settings, if any
-      getConfOverlay().asScala.foreach { case (k, v) =>
-        try {
-          sqlOperationConf.verifyAndSet(k, v)
-        } catch {
-          case e: IllegalArgumentException =>
-            throw new HiveSQLException("Error applying statement specific settings", e)
-        }
-      }
-    }
-    return sqlOperationConf
-  }
-
-  private def getCurrentHive(): Hive = {
-    try {
-      return Hive.get()
-    } catch {
-      case e: HiveException =>
-        throw new HiveSQLException("Failed to get current Hive object", e);
-    }
-  }
 }
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
index 92ac0ec3fca2..33aaead3fbf9 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
@@ -36,7 +36,7 @@ private[hive] class SparkSQLSessionManager(hiveServer: HiveServer2, hiveContext:
   extends SessionManager(hiveServer)
   with ReflectedCompositeService {
 
-  private lazy val sparkSqlOperationManager = new SparkSQLOperationManager(hiveContext)
+  private lazy val sparkSqlOperationManager = new SparkSQLOperationManager()
 
   override def init(hiveConf: HiveConf) {
     setSuperField(this, "hiveConf", hiveConf)
@@ -60,13 +60,15 @@ private[hive] class SparkSQLSessionManager(hiveServer: HiveServer2, hiveContext:
       sessionConf: java.util.Map[String, String],
       withImpersonation: Boolean,
       delegationToken: String): SessionHandle = {
-    hiveContext.openSession()
     val sessionHandle =
       super.openSession(protocol, username, passwd, ipAddress, sessionConf, withImpersonation,
           delegationToken)
     val session = super.getSession(sessionHandle)
     HiveThriftServer2.listener.onSessionCreated(
       session.getIpAddress, sessionHandle.getSessionId.toString, session.getUsername)
+    val ctx = hiveContext.newSession()
+    ctx.setConf("spark.sql.hive.version", HiveContext.hiveExecutionVersion)
+    sparkSqlOperationManager.sessionToContexts += sessionHandle -> ctx
     sessionHandle
   }
 
@@ -74,7 +76,6 @@ private[hive] class SparkSQLSessionManager(hiveServer: HiveServer2, hiveContext:
     HiveThriftServer2.listener.onSessionClosed(sessionHandle.getSessionId.toString)
     super.closeSession(sessionHandle)
     sparkSqlOperationManager.sessionToActivePool -= sessionHandle
-
-    hiveContext.detachSession()
+    sparkSqlOperationManager.sessionToContexts.remove(sessionHandle)
   }
 }
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/server/SparkSQLOperationManager.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/server/SparkSQLOperationManager.scala
index c8031ed0f343..476651a559d2 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/server/SparkSQLOperationManager.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/server/SparkSQLOperationManager.scala
@@ -30,20 +30,21 @@ import org.apache.spark.sql.hive.thriftserver.{SparkExecuteStatementOperation, R
 /**
  * Executes queries using Spark SQL, and maintains a list of handles to active queries.
  */
-private[thriftserver] class SparkSQLOperationManager(hiveContext: HiveContext)
+private[thriftserver] class SparkSQLOperationManager()
   extends OperationManager with Logging {
 
   val handleToOperation = ReflectionUtils
     .getSuperField[JMap[OperationHandle, Operation]](this, "handleToOperation")
 
   val sessionToActivePool = Map[SessionHandle, String]()
+  val sessionToContexts = Map[SessionHandle, HiveContext]()
 
   override def newExecuteStatementOperation(
       parentSession: HiveSession,
       statement: String,
       confOverlay: JMap[String, String],
       async: Boolean): ExecuteStatementOperation = synchronized {
-
+    val hiveContext = sessionToContexts(parentSession.getSessionHandle)
     val runInBackground = async && hiveContext.hiveThriftServerAsync
     val operation = new SparkExecuteStatementOperation(parentSession, statement, confOverlay,
       runInBackground)(hiveContext, sessionToActivePool)
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
index e59a14ec00d5..76d1591a235c 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
@@ -96,7 +96,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
       buffer += s"${new Timestamp(new Date().getTime)} - $source> $line"
 
       // If we haven't found all expected answers and another expected answer comes up...
-      if (next < expectedAnswers.size && line.startsWith(expectedAnswers(next))) {
+      if (next < expectedAnswers.size && line.contains(expectedAnswers(next))) {
         next += 1
         // If all expected answers have been found...
         if (next == expectedAnswers.size) {
@@ -159,7 +159,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
       s"LOAD DATA LOCAL INPATH '$dataFilePath' OVERWRITE INTO TABLE hive_test;"
         -> "OK",
       "CACHE TABLE hive_test;"
-        -> "Time taken: ",
+        -> "",
       "SELECT COUNT(*) FROM hive_test;"
         -> "5",
       "DROP TABLE hive_test;"
@@ -180,7 +180,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
       "CREATE TABLE hive_test(key INT, val STRING);"
         -> "OK",
       "SHOW TABLES;"
-        -> "Time taken: "
+        -> "hive_test"
     )
 
     runCliWithin(2.minute, Seq("--database", "hive_test_db", "-e", "SHOW TABLES;"))(
@@ -210,7 +210,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
       s"LOAD DATA LOCAL INPATH '$dataFilePath' OVERWRITE INTO TABLE sourceTable;"
         -> "OK",
       "INSERT INTO TABLE t1 SELECT key, val FROM sourceTable;"
-        -> "Time taken:",
+        -> "",
       "SELECT count(key) FROM t1;"
         -> "5",
       "DROP TABLE t1;"
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index 19b2f24456ab..ff8ca0150649 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -205,6 +205,7 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
     import org.apache.spark.sql.SQLConf
     var defaultV1: String = null
     var defaultV2: String = null
+    var data: ArrayBuffer[Int] = null
 
     withMultipleConnectionJdbcStatement(
       // create table
@@ -214,10 +215,16 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
             "DROP TABLE IF EXISTS test_map",
             "CREATE TABLE test_map(key INT, value STRING)",
             s"LOAD DATA LOCAL INPATH '${TestData.smallKv}' OVERWRITE INTO TABLE test_map",
-            "CACHE TABLE test_table AS SELECT key FROM test_map ORDER BY key DESC")
+            "CACHE TABLE test_table AS SELECT key FROM test_map ORDER BY key DESC",
+            "CREATE DATABASE db1")
 
         queries.foreach(statement.execute)
 
+        val plan = statement.executeQuery("explain select * from test_table")
+        plan.next()
+        plan.next()
+        assert(plan.getString(1).contains("InMemoryColumnarTableScan"))
+
         val rs1 = statement.executeQuery("SELECT key FROM test_table ORDER BY KEY DESC")
         val buf1 = new collection.mutable.ArrayBuffer[Int]()
         while (rs1.next()) {
@@ -233,6 +240,8 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
         rs2.close()
 
         assert(buf1 === buf2)
+
+        data = buf1
       },
 
       // first session, we get the default value of the session status
@@ -289,56 +298,51 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
         rs2.close()
       },
 
-      // accessing the cached data in another session
+      // try to access the cached data in another session
       { statement =>
 
-        val rs1 = statement.executeQuery("SELECT key FROM test_table ORDER BY KEY DESC")
-        val buf1 = new collection.mutable.ArrayBuffer[Int]()
-        while (rs1.next()) {
-          buf1 += rs1.getInt(1)
+        // Cached temporary table can't be accessed by other sessions
+        intercept[SQLException] {
+          statement.executeQuery("SELECT key FROM test_table ORDER BY KEY DESC")
         }
-        rs1.close()
 
-        val rs2 = statement.executeQuery("SELECT key FROM test_map ORDER BY KEY DESC")
-        val buf2 = new collection.mutable.ArrayBuffer[Int]()
-        while (rs2.next()) {
-          buf2 += rs2.getInt(1)
+        val plan = statement.executeQuery("explain select key from test_map ORDER BY key DESC")
+        plan.next()
+        plan.next()
+        assert(plan.getString(1).contains("InMemoryColumnarTableScan"))
+
+        val rs = statement.executeQuery("SELECT key FROM test_map ORDER BY KEY DESC")
+        val buf = new collection.mutable.ArrayBuffer[Int]()
+        while (rs.next()) {
+          buf += rs.getInt(1)
         }
-        rs2.close()
+        rs.close()
+        assert(buf === data)
+      },
 
-        assert(buf1 === buf2)
-        statement.executeQuery("UNCACHE TABLE test_table")
+      // switch another database
+      { statement =>
+        statement.execute("USE db1")
 
-        // TODO need to figure out how to determine if the data loaded from cache
-        val rs3 = statement.executeQuery("SELECT key FROM test_map ORDER BY KEY DESC")
-        val buf3 = new collection.mutable.ArrayBuffer[Int]()
-        while (rs3.next()) {
-          buf3 += rs3.getInt(1)
+        // there is no test_map table in db1
+        intercept[SQLException] {
+          statement.executeQuery("SELECT key FROM test_map ORDER BY KEY DESC")
         }
-        rs3.close()
 
-        assert(buf1 === buf3)
+        statement.execute("CREATE TABLE test_map2(key INT, value STRING)")
       },
 
-      // accessing the uncached table
+      // access default database
       { statement =>
 
-        // TODO need to figure out how to determine if the data loaded from cache
-        val rs1 = statement.executeQuery("SELECT key FROM test_table ORDER BY KEY DESC")
-        val buf1 = new collection.mutable.ArrayBuffer[Int]()
-        while (rs1.next()) {
-          buf1 += rs1.getInt(1)
-        }
-        rs1.close()
-
-        val rs2 = statement.executeQuery("SELECT key FROM test_map ORDER BY KEY DESC")
-        val buf2 = new collection.mutable.ArrayBuffer[Int]()
-        while (rs2.next()) {
-          buf2 += rs2.getInt(1)
+        // current database should still be `default`
+        intercept[SQLException] {
+          statement.executeQuery("SELECT key FROM test_map2")
         }
-        rs2.close()
 
-        assert(buf1 === buf2)
+        statement.execute("USE db1")
+        // access test_map2
+        statement.executeQuery("SELECT key from test_map2")
       }
     )
   }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 17de8ef56f9a..dad1e2347c38 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -25,7 +25,6 @@ import java.util.concurrent.TimeUnit
 import scala.collection.JavaConverters._
 import scala.collection.mutable.HashMap
 import scala.language.implicitConversions
-import scala.concurrent.duration._
 
 import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.hive.common.StatsSetupConst
@@ -34,32 +33,49 @@ import org.apache.hadoop.hive.conf.HiveConf
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
 import org.apache.hadoop.hive.ql.metadata.Table
 import org.apache.hadoop.hive.ql.parse.VariableSubstitution
-import org.apache.hadoop.hive.ql.session.SessionState
 import org.apache.hadoop.hive.serde2.io.{DateWritable, TimestampWritable}
 
-import org.apache.spark.Logging
-import org.apache.spark.SparkContext
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.sql._
+import org.apache.spark.api.java.JavaSparkContext
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.SQLConf.SQLConfEntry._
-import org.apache.spark.sql.catalyst.{SqlParser, TableIdentifier, ParserDialect}
+import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
+import org.apache.spark.sql.catalyst.expressions.{Expression, LeafExpression}
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.execution.{ExecutedCommand, ExtractPythonUDFs, SetCommand}
-import org.apache.spark.sql.execution.datasources.{PreWriteCheck, PreInsertCastAndRename, DataSourceStrategy}
+import org.apache.spark.sql.catalyst.{InternalRow, ParserDialect, SqlParser}
+import org.apache.spark.sql.execution.datasources.{DataSourceStrategy, PreInsertCastAndRename, PreWriteCheck}
+import org.apache.spark.sql.execution.{CacheManager, ExecutedCommand, ExtractPythonUDFs, SetCommand}
 import org.apache.spark.sql.hive.client._
 import org.apache.spark.sql.hive.execution.{DescribeHiveTableCommand, HiveNativeCommand}
 import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.Utils
+import org.apache.spark.{Logging, SparkContext}
 
 
 /**
  * This is the HiveQL Dialect, this dialect is strongly bind with HiveContext
  */
-private[hive] class HiveQLDialect extends ParserDialect {
+private[hive] class HiveQLDialect(sqlContext: HiveContext) extends ParserDialect {
   override def parse(sqlText: String): LogicalPlan = {
-    HiveQl.parseSql(sqlText)
+    sqlContext.executionHive.withHiveState {
+      HiveQl.parseSql(sqlText)
+    }
+  }
+}
+
+/**
+ * Returns the current database of metadataHive.
+ */
+private[hive] case class CurrentDatabase(ctx: HiveContext)
+  extends LeafExpression with CodegenFallback {
+  override def dataType: DataType = StringType
+  override def foldable: Boolean = true
+  override def nullable: Boolean = false
+  override def eval(input: InternalRow): Any = {
+    UTF8String.fromString(ctx.metadataHive.currentDatabase)
   }
 }
 
@@ -69,13 +85,29 @@ private[hive] class HiveQLDialect extends ParserDialect {
  *
  * @since 1.0.0
  */
-class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
+class HiveContext private[hive](
+    sc: SparkContext,
+    cacheManager: CacheManager,
+    @transient execHive: ClientWrapper,
+    @transient metaHive: ClientInterface) extends SQLContext(sc, cacheManager) with Logging {
   self =>
 
-  import HiveContext._
+  def this(sc: SparkContext) = this(sc, new CacheManager, null, null)
+  def this(sc: JavaSparkContext) = this(sc.sc)
+
+  import org.apache.spark.sql.hive.HiveContext._
 
   logDebug("create HiveContext")
 
+  /**
+   * Returns a new HiveContext as new session, which will have separated SQLConf, UDF/UDAF,
+   * temporary tables and SessionState, but sharing the same CacheManager, IsolatedClientLoader
+   * and Hive client (both of execution and metadata) with existing HiveContext.
+   */
+  override def newSession(): HiveContext = {
+    new HiveContext(sc, cacheManager, executionHive.newSession(), metadataHive.newSession())
+  }
+
   /**
    * When true, enables an experimental feature where metastore tables that use the parquet SerDe
    * are automatically converted to use the Spark SQL parquet table scan, instead of the Hive
@@ -157,14 +189,18 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
    * for storing persistent metadata, and only point to a dummy metastore in a temporary directory.
    */
   @transient
-  protected[hive] lazy val executionHive: ClientWrapper = {
+  protected[hive] lazy val executionHive: ClientWrapper = if (execHive != null) {
+    execHive
+  } else {
     logInfo(s"Initializing execution hive, version $hiveExecutionVersion")
-    new ClientWrapper(
+    val loader = new IsolatedClientLoader(
       version = IsolatedClientLoader.hiveVersion(hiveExecutionVersion),
+      execJars = Seq(),
       config = newTemporaryConfiguration(),
-      initClassLoader = Utils.getContextOrSparkClassLoader)
+      isolationOn = false,
+      baseClassLoader = Utils.getContextOrSparkClassLoader)
+    loader.createClient().asInstanceOf[ClientWrapper]
   }
-  SessionState.setCurrentSessionState(executionHive.state)
 
   /**
    * Overrides default Hive configurations to avoid breaking changes to Spark SQL users.
@@ -182,7 +218,9 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
    * in the hive-site.xml file.
    */
   @transient
-  protected[hive] lazy val metadataHive: ClientInterface = {
+  protected[hive] lazy val metadataHive: ClientInterface = if (metaHive != null) {
+    metaHive
+  } else {
     val metaVersion = IsolatedClientLoader.hiveVersion(hiveMetastoreVersion)
 
     // We instantiate a HiveConf here to read in the hive-site.xml file and then pass the options
@@ -268,14 +306,10 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
         barrierPrefixes = hiveMetastoreBarrierPrefixes,
         sharedPrefixes = hiveMetastoreSharedPrefixes)
     }
-    isolatedLoader.client
+    isolatedLoader.createClient()
   }
 
   protected[sql] override def parseSql(sql: String): LogicalPlan = {
-    var state = SessionState.get()
-    if (state == null) {
-      SessionState.setCurrentSessionState(tlSession.get().asInstanceOf[SQLSession].sessionState)
-    }
     super.parseSql(substitutor.substitute(hiveconf, sql))
   }
 
@@ -384,8 +418,6 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
     }
   }
 
-  protected[hive] def hiveconf = tlSession.get().asInstanceOf[this.SQLSession].hiveconf
-
   override def setConf(key: String, value: String): Unit = {
     super.setConf(key, value)
     executionHive.runSqlHive(s"SET $key=$value")
@@ -402,7 +434,7 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
     setConf(entry.key, entry.stringConverter(value))
   }
 
-    /* A catalyst metadata catalog that points to the Hive Metastore. */
+  /* A catalyst metadata catalog that points to the Hive Metastore. */
   @transient
   override protected[sql] lazy val catalog =
     new HiveMetastoreCatalog(metadataHive, this) with OverrideCatalog
@@ -410,7 +442,13 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
   // Note that HiveUDFs will be overridden by functions registered in this context.
   @transient
   override protected[sql] lazy val functionRegistry: FunctionRegistry =
-    new HiveFunctionRegistry(FunctionRegistry.builtin)
+    new HiveFunctionRegistry(FunctionRegistry.builtin.copy())
+
+  // The Hive UDF current_database() is foldable, will be evaluated by optimizer, but the optimizer
+  // can't access the SessionState of metadataHive.
+  functionRegistry.registerFunction(
+    "current_database",
+    (expressions: Seq[Expression]) => new CurrentDatabase(this))
 
   /* An analyzer that uses the Hive metastore. */
   @transient
@@ -430,10 +468,6 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
       )
     }
 
-  override protected[sql] def createSession(): SQLSession = {
-    new this.SQLSession()
-  }
-
   /** Overridden by child classes that need to set configuration before the client init. */
   protected def configure(): Map[String, String] = {
     // Hive 0.14.0 introduces timeout operations in HiveConf, and changes default values of a bunch
@@ -488,41 +522,40 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
     }.toMap
   }
 
-  protected[hive] class SQLSession extends super.SQLSession {
-    protected[sql] override lazy val conf: SQLConf = new SQLConf {
-      override def dialect: String = getConf(SQLConf.DIALECT, "hiveql")
-      override def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE, false)
-    }
-
-    /**
-     * SQLConf and HiveConf contracts:
-     *
-     * 1. reuse existing started SessionState if any
-     * 2. when the Hive session is first initialized, params in HiveConf will get picked up by the
-     *    SQLConf.  Additionally, any properties set by set() or a SET command inside sql() will be
-     *    set in the SQLConf *as well as* in the HiveConf.
-     */
-    protected[hive] lazy val sessionState: SessionState = {
-      var state = SessionState.get()
-      if (state == null) {
-        state = new SessionState(new HiveConf(classOf[SessionState]))
-        SessionState.start(state)
-      }
-      state
-    }
+  /**
+   * SQLConf and HiveConf contracts:
+   *
+   * 1. create a new SessionState for each HiveContext
+   * 2. when the Hive session is first initialized, params in HiveConf will get picked up by the
+   *    SQLConf.  Additionally, any properties set by set() or a SET command inside sql() will be
+   *    set in the SQLConf *as well as* in the HiveConf.
+   */
+  @transient
+  protected[hive] lazy val hiveconf: HiveConf = {
+    val c = executionHive.conf
+    setConf(c.getAllProperties)
+    c
+  }
 
-    protected[hive] lazy val hiveconf: HiveConf = {
-      setConf(sessionState.getConf.getAllProperties)
-      sessionState.getConf
-    }
+  protected[sql] override lazy val conf: SQLConf = new SQLConf {
+    override def dialect: String = getConf(SQLConf.DIALECT, "hiveql")
+    override def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE, false)
   }
 
-  override protected[sql] def dialectClassName = if (conf.dialect == "hiveql") {
+  protected[sql] override def dialectClassName = if (conf.dialect == "hiveql") {
     classOf[HiveQLDialect].getCanonicalName
   } else {
     super.dialectClassName
   }
 
+  protected[sql] override def getSQLDialect(): ParserDialect = {
+    if (conf.dialect == "hiveql") {
+      new HiveQLDialect(this)
+    } else {
+      super.getSQLDialect()
+    }
+  }
+
   @transient
   private val hivePlanner = new SparkPlanner with HiveStrategies {
     val hiveContext = self
@@ -598,6 +631,14 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) with Logging {
         case _ => super.simpleString
       }
   }
+
+  protected[sql] override def addJar(path: String): Unit = {
+    // Add jar to Hive and classloader
+    executionHive.addJar(path)
+    metadataHive.addJar(path)
+    Thread.currentThread().setContextClassLoader(executionHive.clientLoader.classLoader)
+    super.addJar(path)
+  }
 }
 
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 2bf22f544964..250c23285688 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -25,29 +25,27 @@ import scala.collection.mutable.ArrayBuffer
 
 import org.apache.hadoop.hive.conf.HiveConf
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
-import org.apache.hadoop.hive.serde.serdeConstants
-import org.apache.hadoop.hive.ql.{ErrorMsg, Context}
-import org.apache.hadoop.hive.ql.exec.{FunctionRegistry, FunctionInfo}
+import org.apache.hadoop.hive.ql.exec.{FunctionInfo, FunctionRegistry}
 import org.apache.hadoop.hive.ql.lib.Node
 import org.apache.hadoop.hive.ql.parse._
 import org.apache.hadoop.hive.ql.plan.PlanUtils
 import org.apache.hadoop.hive.ql.session.SessionState
+import org.apache.hadoop.hive.ql.{Context, ErrorMsg}
+import org.apache.hadoop.hive.serde.serdeConstants
 import org.apache.hadoop.hive.serde2.`lazy`.LazySimpleSerDe
 
 import org.apache.spark.Logging
-import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst
+import org.apache.spark.sql.{AnalysisException, catalyst}
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans._
-import org.apache.spark.sql.catalyst.plans.logical
+import org.apache.spark.sql.catalyst.plans.{logical, _}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.trees.CurrentOrigin
 import org.apache.spark.sql.execution.ExplainCommand
 import org.apache.spark.sql.execution.datasources.DescribeCommand
 import org.apache.spark.sql.hive.HiveShim._
 import org.apache.spark.sql.hive.client._
-import org.apache.spark.sql.hive.execution.{HiveNativeCommand, DropTable, AnalyzeTable, HiveScriptIOSchema}
+import org.apache.spark.sql.hive.execution.{AnalyzeTable, DropTable, HiveNativeCommand, HiveScriptIOSchema}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.CalendarInterval
 import org.apache.spark.util.random.RandomSampler
@@ -268,7 +266,7 @@ private[hive] object HiveQl extends Logging {
     node
   }
 
-  private def createContext(): Context = new Context(SessionState.get().getConf())
+  private def createContext(): Context = new Context(hiveConf)
 
   private def getAst(sql: String, context: Context) =
     ParseUtils.findRootNonNullToken((new ParseDriver).parse(sql, context))
@@ -277,12 +275,16 @@ private[hive] object HiveQl extends Logging {
    * Returns the HiveConf
    */
   private[this] def hiveConf: HiveConf = {
-    val ss = SessionState.get() // SessionState is lazy initialization, it can be null here
+    var ss = SessionState.get()
+    // SessionState is lazy initialization, it can be null here
     if (ss == null) {
-      new HiveConf()
-    } else {
-      ss.getConf
+      val original = Thread.currentThread().getContextClassLoader
+      val conf = new HiveConf(classOf[SessionState])
+      conf.setClassLoader(original)
+      ss = new SessionState(conf)
+      SessionState.start(ss)
     }
+    ss.getConf
   }
 
   /** Returns a LogicalPlan for a given HiveQL string. */
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
index 915eae9d21e2..9d9a55edd731 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientInterface.scala
@@ -178,6 +178,15 @@ private[hive] trait ClientInterface {
       holdDDLTime: Boolean,
       listBucketingEnabled: Boolean): Unit
 
+  /** Add a jar into class loader */
+  def addJar(path: String): Unit
+
+  /** Return a ClientInterface as new session, that will share the class loader and Hive client */
+  def newSession(): ClientInterface
+
+  /** Run a function within Hive state (SessionState, HiveConf, Hive client and class loader) */
+  def withHiveState[A](f: => A): A
+
   /** Used for testing only.  Removes all metadata from this instance of Hive. */
   def reset(): Unit
 }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
index 8f6d448b2aef..3dce86c48074 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
@@ -60,7 +60,8 @@ import org.apache.spark.util.{CircularBuffer, Utils}
 private[hive] class ClientWrapper(
     override val version: HiveVersion,
     config: Map[String, String],
-    initClassLoader: ClassLoader)
+    initClassLoader: ClassLoader,
+    val clientLoader: IsolatedClientLoader)
   extends ClientInterface
   with Logging {
 
@@ -150,31 +151,29 @@ private[hive] class ClientWrapper(
     // Switch to the initClassLoader.
     Thread.currentThread().setContextClassLoader(initClassLoader)
     val ret = try {
-      val oldState = SessionState.get()
-      if (oldState == null) {
-        val initialConf = new HiveConf(classOf[SessionState])
-        // HiveConf is a Hadoop Configuration, which has a field of classLoader and
-        // the initial value will be the current thread's context class loader
-        // (i.e. initClassLoader at here).
-        // We call initialConf.setClassLoader(initClassLoader) at here to make
-        // this action explicit.
-        initialConf.setClassLoader(initClassLoader)
-        config.foreach { case (k, v) =>
-          if (k.toLowerCase.contains("password")) {
-            logDebug(s"Hive Config: $k=xxx")
-          } else {
-            logDebug(s"Hive Config: $k=$v")
-          }
-          initialConf.set(k, v)
+      val initialConf = new HiveConf(classOf[SessionState])
+      // HiveConf is a Hadoop Configuration, which has a field of classLoader and
+      // the initial value will be the current thread's context class loader
+      // (i.e. initClassLoader at here).
+      // We call initialConf.setClassLoader(initClassLoader) at here to make
+      // this action explicit.
+      initialConf.setClassLoader(initClassLoader)
+      config.foreach { case (k, v) =>
+        if (k.toLowerCase.contains("password")) {
+          logDebug(s"Hive Config: $k=xxx")
+        } else {
+          logDebug(s"Hive Config: $k=$v")
         }
-        val newState = new SessionState(initialConf)
-        SessionState.start(newState)
-        newState.out = new PrintStream(outputBuffer, true, "UTF-8")
-        newState.err = new PrintStream(outputBuffer, true, "UTF-8")
-        newState
-      } else {
-        oldState
+        initialConf.set(k, v)
+      }
+      val state = new SessionState(initialConf)
+      if (clientLoader.cachedHive != null) {
+        Hive.set(clientLoader.cachedHive.asInstanceOf[Hive])
       }
+      SessionState.start(state)
+      state.out = new PrintStream(outputBuffer, true, "UTF-8")
+      state.err = new PrintStream(outputBuffer, true, "UTF-8")
+      state
     } finally {
       Thread.currentThread().setContextClassLoader(original)
     }
@@ -188,11 +187,6 @@ private[hive] class ClientWrapper(
     conf.get(key, defaultValue)
   }
 
-  // TODO: should be a def?s
-  // When we create this val client, the HiveConf of it (conf) is the one associated with state.
-  @GuardedBy("this")
-  private var client = Hive.get(conf)
-
   // We use hive's conf for compatibility.
   private val retryLimit = conf.getIntVar(HiveConf.ConfVars.METASTORETHRIFTFAILURERETRIES)
   private val retryDelayMillis = shim.getMetastoreClientConnectRetryDelayMillis(conf)
@@ -200,7 +194,7 @@ private[hive] class ClientWrapper(
   /**
    * Runs `f` with multiple retries in case the hive metastore is temporarily unreachable.
    */
-  private def retryLocked[A](f: => A): A = synchronized {
+  private def retryLocked[A](f: => A): A = clientLoader.synchronized {
     // Hive sometimes retries internally, so set a deadline to avoid compounding delays.
     val deadline = System.nanoTime + (retryLimit * retryDelayMillis * 1e6).toLong
     var numTries = 0
@@ -215,13 +209,8 @@ private[hive] class ClientWrapper(
           logWarning(
             "HiveClientWrapper got thrift exception, destroying client and retrying " +
               s"(${retryLimit - numTries} tries remaining)", e)
+          clientLoader.cachedHive = null
           Thread.sleep(retryDelayMillis)
-          try {
-            client = Hive.get(state.getConf, true)
-          } catch {
-            case e: Exception if causedByThrift(e) =>
-              logWarning("Failed to refresh hive client, will retry.", e)
-          }
       }
     } while (numTries <= retryLimit && System.nanoTime < deadline)
     if (System.nanoTime > deadline) {
@@ -242,13 +231,26 @@ private[hive] class ClientWrapper(
     false
   }
 
+  def client: Hive = {
+    if (clientLoader.cachedHive != null) {
+      clientLoader.cachedHive.asInstanceOf[Hive]
+    } else {
+      val c = Hive.get(conf)
+      clientLoader.cachedHive = c
+      c
+    }
+  }
+
   /**
    * Runs `f` with ThreadLocal session state and classloaders configured for this version of hive.
    */
-  private def withHiveState[A](f: => A): A = retryLocked {
+  def withHiveState[A](f: => A): A = retryLocked {
     val original = Thread.currentThread().getContextClassLoader
     // Set the thread local metastore client to the client associated with this ClientWrapper.
     Hive.set(client)
+    // The classloader in clientLoader could be changed after addJar, always use the latest
+    // classloader
+    state.getConf.setClassLoader(clientLoader.classLoader)
     // setCurrentSessionState will use the classLoader associated
     // with the HiveConf in `state` to override the context class loader of the current
     // thread.
@@ -545,6 +547,15 @@ private[hive] class ClientWrapper(
       listBucketingEnabled)
   }
 
+  def addJar(path: String): Unit = {
+    clientLoader.addJar(path)
+    runSqlHive(s"ADD JAR $path")
+  }
+
+  def newSession(): ClientWrapper = {
+    clientLoader.createClient().asInstanceOf[ClientWrapper]
+  }
+
   def reset(): Unit = withHiveState {
     client.getAllTables("default").asScala.foreach { t =>
         logDebug(s"Deleting table $t")
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
index 1fe4cba9571f..567e4d7b411e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
@@ -22,6 +22,7 @@ import java.lang.reflect.InvocationTargetException
 import java.net.{URL, URLClassLoader}
 import java.util
 
+import scala.collection.mutable
 import scala.language.reflectiveCalls
 import scala.util.Try
 
@@ -148,53 +149,75 @@ private[hive] class IsolatedClientLoader(
     name.replaceAll("\\.", "/") + ".class"
 
   /** The classloader that is used to load an isolated version of Hive. */
-  protected val classLoader: ClassLoader = new URLClassLoader(allJars, rootClassLoader) {
-    override def loadClass(name: String, resolve: Boolean): Class[_] = {
-      val loaded = findLoadedClass(name)
-      if (loaded == null) doLoadClass(name, resolve) else loaded
-    }
-
-    def doLoadClass(name: String, resolve: Boolean): Class[_] = {
-      val classFileName = name.replaceAll("\\.", "/") + ".class"
-      if (isBarrierClass(name) && isolationOn) {
-        // For barrier classes, we construct a new copy of the class.
-        val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
-        logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
-        defineClass(name, bytes, 0, bytes.length)
-      } else if (!isSharedClass(name)) {
-        logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
-        super.loadClass(name, resolve)
-      } else {
-        // For shared classes, we delegate to baseClassLoader.
-        logDebug(s"shared class: $name")
-        baseClassLoader.loadClass(name)
+  private[hive] var classLoader: ClassLoader = if (isolationOn) {
+    new URLClassLoader(allJars, rootClassLoader) {
+      override def loadClass(name: String, resolve: Boolean): Class[_] = {
+        val loaded = findLoadedClass(name)
+        if (loaded == null) doLoadClass(name, resolve) else loaded
+      }
+      def doLoadClass(name: String, resolve: Boolean): Class[_] = {
+        val classFileName = name.replaceAll("\\.", "/") + ".class"
+        if (isBarrierClass(name)) {
+          // For barrier classes, we construct a new copy of the class.
+          val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
+          logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
+          defineClass(name, bytes, 0, bytes.length)
+        } else if (!isSharedClass(name)) {
+          logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
+          super.loadClass(name, resolve)
+        } else {
+          // For shared classes, we delegate to baseClassLoader.
+          logDebug(s"shared class: $name")
+          baseClassLoader.loadClass(name)
+        }
       }
     }
+  } else {
+    baseClassLoader
   }
 
-  // Pre-reflective instantiation setup.
-  logDebug("Initializing the logger to avoid disaster...")
-  Thread.currentThread.setContextClassLoader(classLoader)
+  private[hive] def addJar(path: String): Unit = synchronized {
+    val jarURL = new java.io.File(path).toURI.toURL
+    // TODO: we should avoid of stacking classloaders (use a single URLClassLoader and add jars
+    // to that)
+    classLoader = new java.net.URLClassLoader(Array(jarURL), classLoader)
+  }
 
   /** The isolated client interface to Hive. */
-  val client: ClientInterface = try {
-    classLoader
-      .loadClass(classOf[ClientWrapper].getName)
-      .getConstructors.head
-      .newInstance(version, config, classLoader)
-      .asInstanceOf[ClientInterface]
-  } catch {
-    case e: InvocationTargetException =>
-      if (e.getCause().isInstanceOf[NoClassDefFoundError]) {
-        val cnf = e.getCause().asInstanceOf[NoClassDefFoundError]
-        throw new ClassNotFoundException(
-          s"$cnf when creating Hive client using classpath: ${execJars.mkString(", ")}\n" +
-           "Please make sure that jars for your version of hive and hadoop are included in the " +
-          s"paths passed to ${HiveContext.HIVE_METASTORE_JARS}.")
-      } else {
-        throw e
-      }
-  } finally {
-    Thread.currentThread.setContextClassLoader(baseClassLoader)
+  private[hive] def createClient(): ClientInterface = {
+    if (!isolationOn) {
+      return new ClientWrapper(version, config, baseClassLoader, this)
+    }
+    // Pre-reflective instantiation setup.
+    logDebug("Initializing the logger to avoid disaster...")
+    val origLoader = Thread.currentThread().getContextClassLoader
+    Thread.currentThread.setContextClassLoader(classLoader)
+
+    try {
+      classLoader
+        .loadClass(classOf[ClientWrapper].getName)
+        .getConstructors.head
+        .newInstance(version, config, classLoader, this)
+        .asInstanceOf[ClientInterface]
+    } catch {
+      case e: InvocationTargetException =>
+        if (e.getCause().isInstanceOf[NoClassDefFoundError]) {
+          val cnf = e.getCause().asInstanceOf[NoClassDefFoundError]
+          throw new ClassNotFoundException(
+            s"$cnf when creating Hive client using classpath: ${execJars.mkString(", ")}\n" +
+            "Please make sure that jars for your version of hive and hadoop are included in the " +
+            s"paths passed to ${HiveContext.HIVE_METASTORE_JARS}.")
+        } else {
+          throw e
+        }
+    } finally {
+      Thread.currentThread.setContextClassLoader(origLoader)
+    }
   }
+
+  /**
+   * The place holder for shared Hive client for all the HiveContext sessions (they share an
+   * IsolatedClientLoader).
+   */
+  private[hive] var cachedHive: Any = null
 }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
index 9f654eed5761..51ec92afd06e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
@@ -18,18 +18,18 @@
 package org.apache.spark.sql.hive.execution
 
 import org.apache.hadoop.hive.metastore.MetaStoreUtils
+
 import org.apache.spark.sql._
-import org.apache.spark.sql.catalyst.{TableIdentifier, SqlParser}
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.catalyst.analysis.EliminateSubQueries
 import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.execution.RunnableCommand
-import org.apache.spark.sql.execution.datasources.{ResolvedDataSource, LogicalRelation}
+import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.hive.HiveContext
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types._
-import org.apache.spark.util.Utils
 
 /**
  * Analyzes the given table in the current database to generate statistics, which will be
@@ -86,26 +86,7 @@ case class AddJar(path: String) extends RunnableCommand {
   }
 
   override def run(sqlContext: SQLContext): Seq[Row] = {
-    val hiveContext = sqlContext.asInstanceOf[HiveContext]
-    val currentClassLoader = Utils.getContextOrSparkClassLoader
-
-    // Add jar to current context
-    val jarURL = new java.io.File(path).toURI.toURL
-    val newClassLoader = new java.net.URLClassLoader(Array(jarURL), currentClassLoader)
-    Thread.currentThread.setContextClassLoader(newClassLoader)
-    // We need to explicitly set the class loader associated with the conf in executionHive's
-    // state because this class loader will be used as the context class loader of the current
-    // thread to execute any Hive command.
-    // We cannot use `org.apache.hadoop.hive.ql.metadata.Hive.get().getConf()` because Hive.get()
-    // returns the value of a thread local variable and its HiveConf may not be the HiveConf
-    // associated with `executionHive.state` (for example, HiveContext is created in one thread
-    // and then add jar is called from another thread).
-    hiveContext.executionHive.state.getConf.setClassLoader(newClassLoader)
-    // Add jar to isolated hive (metadataHive) class loader.
-    hiveContext.runSqlHive(s"ADD JAR $path")
-
-    // Add jar to executors
-    hiveContext.sparkContext.addJar(path)
+    sqlContext.addJar(path)
 
     Seq(Row(0))
   }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
index be335a47dcab..ff39ccb7c1ea 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
@@ -116,27 +116,18 @@ class TestHiveContext(sc: SparkContext) extends HiveContext(sc) {
   override def executePlan(plan: LogicalPlan): this.QueryExecution =
     new this.QueryExecution(plan)
 
-  // Make sure we set those test specific confs correctly when we create
-  // the SQLConf as well as when we call clear.
-  override protected[sql] def createSession(): SQLSession = {
-    new this.SQLSession()
-  }
-
-  protected[hive] class SQLSession extends super.SQLSession {
-    protected[sql] override lazy val conf: SQLConf = new SQLConf {
-      // TODO as in unit test, conf.clear() probably be called, all of the value will be cleared.
-      // The super.getConf(SQLConf.DIALECT) is "sql" by default, we need to set it as "hiveql"
-      override def dialect: String = super.getConf(SQLConf.DIALECT, "hiveql")
-      override def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE, false)
+  protected[sql] override lazy val conf: SQLConf = new SQLConf {
+    // The super.getConf(SQLConf.DIALECT) is "sql" by default, we need to set it as "hiveql"
+    override def dialect: String = super.getConf(SQLConf.DIALECT, "hiveql")
+    override def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE, false)
 
-      clear()
+    clear()
 
-      override def clear(): Unit = {
-        super.clear()
+    override def clear(): Unit = {
+      super.clear()
 
-        TestHiveContext.overrideConfs.map {
-          case (key, value) => setConfString(key, value)
-        }
+      TestHiveContext.overrideConfs.map {
+        case (key, value) => setConfString(key, value)
       }
     }
   }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
index 79cf40aba4bf..528a7398b10d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
@@ -17,22 +17,15 @@
 
 package org.apache.spark.sql.hive
 
-import org.apache.hadoop.hive.conf.HiveConf
-import org.apache.hadoop.hive.ql.session.SessionState
 import org.apache.hadoop.hive.serde.serdeConstants
+import org.scalatest.BeforeAndAfterAll
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.hive.client.{ManagedTable, HiveColumn, ExternalTable, HiveTable}
-import org.scalatest.BeforeAndAfterAll
+import org.apache.spark.sql.hive.client.{ExternalTable, HiveColumn, HiveTable, ManagedTable}
 
 
 class HiveQlSuite extends SparkFunSuite with BeforeAndAfterAll {
-  override def beforeAll() {
-    if (SessionState.get() == null) {
-      SessionState.start(new HiveConf())
-    }
-  }
-
   private def extractTableDesc(sql: String): (HiveTable, Boolean) = {
     HiveQl.createPlan(sql).collect {
       case CreateTableAsSelect(desc, child, allowExisting) => (desc, allowExisting)
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
index 2da22ec2379f..c6d034a23a1c 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
@@ -53,7 +53,7 @@ class VersionsSuite extends SparkFunSuite with Logging {
   test("success sanity check") {
     val badClient = IsolatedClientLoader.forVersion(HiveContext.hiveExecutionVersion,
       buildConf(),
-      ivyPath).client
+      ivyPath).createClient()
     val db = new HiveDatabase("default", "")
     badClient.createDatabase(db)
   }
@@ -83,7 +83,7 @@ class VersionsSuite extends SparkFunSuite with Logging {
   ignore("failure sanity check") {
     val e = intercept[Throwable] {
       val badClient = quietly {
-        IsolatedClientLoader.forVersion("13", buildConf(), ivyPath).client
+        IsolatedClientLoader.forVersion("13", buildConf(), ivyPath).createClient()
       }
     }
     assert(getNestedMessages(e) contains "Unknown column 'A0.OWNER_NAME' in 'field list'")
@@ -97,7 +97,7 @@ class VersionsSuite extends SparkFunSuite with Logging {
     test(s"$version: create client") {
       client = null
       System.gc() // Hack to avoid SEGV on some JVM versions.
-      client = IsolatedClientLoader.forVersion(version, buildConf(), ivyPath).client
+      client = IsolatedClientLoader.forVersion(version, buildConf(), ivyPath).createClient()
     }
 
     test(s"$version: createDatabase") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index fe63ad568319..287850045314 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -1133,6 +1133,38 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
     conf.clear()
   }
 
+  test("current_database with multiple sessions") {
+    sql("create database a")
+    sql("use a")
+    val s2 = newSession()
+    s2.sql("create database b")
+    s2.sql("use b")
+
+    assert(sql("select current_database()").first() === Row("a"))
+    assert(s2.sql("select current_database()").first() === Row("b"))
+
+    try {
+      sql("create table test_a(key INT, value STRING)")
+      s2.sql("create table test_b(key INT, value STRING)")
+
+      sql("select * from test_a")
+      intercept[AnalysisException] {
+        sql("select * from test_b")
+      }
+      sql("select * from b.test_b")
+
+      s2.sql("select * from test_b")
+      intercept[AnalysisException] {
+        s2.sql("select * from test_a")
+      }
+      s2.sql("select * from a.test_a")
+    } finally {
+      sql("DROP TABLE IF EXISTS test_a")
+      s2.sql("DROP TABLE IF EXISTS test_b")
+    }
+
+  }
+
   createQueryTest("select from thrift based table",
     "SELECT * from src_thrift")
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index ec5b83b98e40..ccc15eaa63f4 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -160,10 +160,15 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   }
 
   test("show functions") {
-    val allFunctions =
+    val allBuiltinFunctions =
       (FunctionRegistry.builtin.listFunction().toSet[String] ++
         org.apache.hadoop.hive.ql.exec.FunctionRegistry.getFunctionNames.asScala).toList.sorted
-    checkAnswer(sql("SHOW functions"), allFunctions.map(Row(_)))
+    // The TestContext is shared by all the test cases, some functions may be registered before
+    // this, so we check that all the builtin functions are returned.
+    val allFunctions = sql("SHOW functions").collect().map(r => r(0))
+    allBuiltinFunctions.foreach { f =>
+      assert(allFunctions.contains(f))
+    }
     checkAnswer(sql("SHOW functions abs"), Row("abs"))
     checkAnswer(sql("SHOW functions 'abs'"), Row("abs"))
     checkAnswer(sql("SHOW functions abc.abs"), Row("abs"))

From 8e67882b905683a1f151679214ef0b575e77c7e1 Mon Sep 17 00:00:00 2001
From: zero323 <matthew.szymkiewicz@gmail.com>
Date: Thu, 8 Oct 2015 18:34:15 -0700
Subject: [PATCH 192/896] =?UTF-8?q?[SPARK-10973]=20[ML]=20[PYTHON]=20=5F?=
 =?UTF-8?q?=5Fgettitem=5F=5F=20method=20throws=20IndexError=20exception=20?=
 =?UTF-8?q?when=20we=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

__gettitem__ method throws IndexError exception when we try to access index after the last non-zero entry

    from pyspark.mllib.linalg import Vectors
    sv = Vectors.sparse(5, {1: 3})
    sv[0]
    ## 0.0
    sv[1]
    ## 3.0
    sv[2]
    ## Traceback (most recent call last):
    ##   File "<stdin>", line 1, in <module>
    ##   File "/python/pyspark/mllib/linalg/__init__.py", line 734, in __getitem__
    ##     row_ind = inds[insert_index]
    ## IndexError: index out of bounds

Author: zero323 <matthew.szymkiewicz@gmail.com>

Closes #9009 from zero323/sparse_vector_index_error.
---
 python/pyspark/mllib/linalg/__init__.py |  3 +++
 python/pyspark/mllib/tests.py           | 12 +++++++-----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index ea42127f1651..d903b9030d8c 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -770,6 +770,9 @@ def __getitem__(self, index):
             raise ValueError("Index %d out of bounds." % index)
 
         insert_index = np.searchsorted(inds, index)
+        if insert_index >= inds.size:
+            return 0.
+
         row_ind = inds[insert_index]
         if row_ind == index:
             return vals[insert_index]
diff --git a/python/pyspark/mllib/tests.py b/python/pyspark/mllib/tests.py
index 96cf13495aa9..2a6a5cd3fe40 100644
--- a/python/pyspark/mllib/tests.py
+++ b/python/pyspark/mllib/tests.py
@@ -237,15 +237,17 @@ def test_conversion(self):
         self.assertTrue(dv.array.dtype == 'float64')
 
     def test_sparse_vector_indexing(self):
-        sv = SparseVector(4, {1: 1, 3: 2})
+        sv = SparseVector(5, {1: 1, 3: 2})
         self.assertEqual(sv[0], 0.)
         self.assertEqual(sv[3], 2.)
         self.assertEqual(sv[1], 1.)
         self.assertEqual(sv[2], 0.)
-        self.assertEqual(sv[-1], 2)
-        self.assertEqual(sv[-2], 0)
-        self.assertEqual(sv[-4], 0)
-        for ind in [4, -5]:
+        self.assertEqual(sv[4], 0.)
+        self.assertEqual(sv[-1], 0.)
+        self.assertEqual(sv[-2], 2.)
+        self.assertEqual(sv[-3], 0.)
+        self.assertEqual(sv[-5], 0.)
+        for ind in [5, -6]:
             self.assertRaises(ValueError, sv.__getitem__, ind)
         for ind in [7.8, '1']:
             self.assertRaises(TypeError, sv.__getitem__, ind)

From fa3e4d8f52995bf632e7eda60dbb776c9f637546 Mon Sep 17 00:00:00 2001
From: Hari Shreedharan <hshreedharan@apache.org>
Date: Thu, 8 Oct 2015 18:50:27 -0700
Subject: [PATCH 193/896] =?UTF-8?q?[SPARK-11019]=20[STREAMING]=20[FLUME]?=
 =?UTF-8?q?=20Gracefully=20shutdown=20Flume=20receiver=20th=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…reads.

Wait for a minute for the receiver threads to shutdown before interrupting them.

Author: Hari Shreedharan <hshreedharan@apache.org>

Closes #9041 from harishreedharan/flume-graceful-shutdown.
---
 .../spark/streaming/flume/FlumePollingInputDStream.scala  | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumePollingInputDStream.scala b/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumePollingInputDStream.scala
index 3b936d88abd3..6737750c3d63 100644
--- a/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumePollingInputDStream.scala
+++ b/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumePollingInputDStream.scala
@@ -18,7 +18,7 @@ package org.apache.spark.streaming.flume
 
 
 import java.net.InetSocketAddress
-import java.util.concurrent.{LinkedBlockingQueue, Executors}
+import java.util.concurrent.{Executors, LinkedBlockingQueue, TimeUnit}
 
 import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
@@ -93,7 +93,11 @@ private[streaming] class FlumePollingReceiver(
 
   override def onStop(): Unit = {
     logInfo("Shutting down Flume Polling Receiver")
-    receiverExecutor.shutdownNow()
+    receiverExecutor.shutdown()
+    // Wait upto a minute for the threads to die
+    if (!receiverExecutor.awaitTermination(60, TimeUnit.SECONDS)) {
+      receiverExecutor.shutdownNow()
+    }
     connections.asScala.foreach(_.transceiver.close())
     channelFactory.releaseExternalResources()
   }

From 09841290055770a619a2e72fbaef1a5e694916ae Mon Sep 17 00:00:00 2001
From: Hari Shreedharan <hshreedharan@apache.org>
Date: Thu, 8 Oct 2015 18:53:38 -0700
Subject: [PATCH 194/896] [SPARK-10955] [STREAMING] Add a warning if dynamic
 allocation for Streaming applications

Dynamic allocation can be painful for streaming apps and can lose data. Log a warning for streaming applications if dynamic allocation is enabled.

Author: Hari Shreedharan <hshreedharan@apache.org>

Closes #8998 from harishreedharan/ss-log-error and squashes the following commits:

462b264 [Hari Shreedharan] Improve log message.
2733d94 [Hari Shreedharan] Minor change to warning message.
eaa48cc [Hari Shreedharan] Log a warning instead of failing the application if dynamic allocation is enabled.
725f090 [Hari Shreedharan] Add config parameter to allow dynamic allocation if the user explicitly sets it.
b3f9a95 [Hari Shreedharan] Disable dynamic allocation and kill app if it is enabled.
a4a5212 [Hari Shreedharan] [streaming] SPARK-10955. Disable dynamic allocation for Streaming applications.
---
 .../org/apache/spark/streaming/StreamingContext.scala    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index 94fea63f55b2..9b2632c22954 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -44,7 +44,7 @@ import org.apache.spark.streaming.dstream._
 import org.apache.spark.streaming.receiver.{ActorReceiver, ActorSupervisorStrategy, Receiver}
 import org.apache.spark.streaming.scheduler.{JobScheduler, StreamingListener}
 import org.apache.spark.streaming.ui.{StreamingJobProgressListener, StreamingTab}
-import org.apache.spark.util.{CallSite, ShutdownHookManager, ThreadUtils}
+import org.apache.spark.util.{CallSite, ShutdownHookManager, ThreadUtils, Utils}
 
 /**
  * Main entry point for Spark Streaming functionality. It provides methods used to create
@@ -564,6 +564,13 @@ class StreamingContext private[streaming] (
           )
       }
     }
+
+    if (Utils.isDynamicAllocationEnabled(sc.conf)) {
+      logWarning("Dynamic Allocation is enabled for this application. " +
+        "Enabling Dynamic allocation for Spark Streaming applications can cause data loss if " +
+        "Write Ahead Log is not enabled for non-replayable sources like Flume. " +
+        "See the programming guide for details on how to enable the Write Ahead Log")
+    }
   }
 
   /**

From 67fbecbf32fced87d3accd2618fef2af9f44fae2 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Thu, 8 Oct 2015 21:44:59 -0700
Subject: [PATCH 195/896] [SPARK-10956] Common MemoryManager interface for
 storage and execution

This patch introduces a `MemoryManager` that is the central arbiter of how much memory to grant to storage and execution. This patch is primarily concerned only with refactoring while preserving the existing behavior as much as possible.

This is the first step away from the existing rigid separation of storage and execution memory, which has several major drawbacks discussed on the [issue](https://issues.apache.org/jira/browse/SPARK-10956). It is the precursor of a series of patches that will attempt to address those drawbacks.

Author: Andrew Or <andrew@databricks.com>
Author: Josh Rosen <joshrosen@databricks.com>
Author: andrewor14 <andrew@databricks.com>

Closes #9000 from andrewor14/memory-manager.
---
 .../scala/org/apache/spark/SparkEnv.scala     |  11 +-
 .../apache/spark/memory/MemoryManager.scala   | 117 ++++++++
 .../spark/memory/StaticMemoryManager.scala    | 202 +++++++++++++
 .../spark/shuffle/ShuffleMemoryManager.scala  |  69 +++--
 .../apache/spark/storage/BlockManager.scala   |  33 +--
 .../apache/spark/storage/MemoryStore.scala    | 272 +++++++++---------
 .../memory/StaticMemoryManagerSuite.scala     | 172 +++++++++++
 .../BlockManagerReplicationSuite.scala        |  29 +-
 .../spark/storage/BlockManagerSuite.scala     |  34 ++-
 .../execution/TestShuffleMemoryManager.scala  |  28 +-
 .../streaming/ReceivedBlockHandlerSuite.scala |  13 +-
 11 files changed, 752 insertions(+), 228 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
 create mode 100644 core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
 create mode 100644 core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index cfde27fb2e7d..df3d84a1f08e 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -30,6 +30,7 @@ import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.api.python.PythonWorkerFactory
 import org.apache.spark.broadcast.BroadcastManager
 import org.apache.spark.metrics.MetricsSystem
+import org.apache.spark.memory.{MemoryManager, StaticMemoryManager}
 import org.apache.spark.network.BlockTransferService
 import org.apache.spark.network.netty.NettyBlockTransferService
 import org.apache.spark.rpc.{RpcEndpointRef, RpcEndpoint, RpcEnv}
@@ -69,6 +70,8 @@ class SparkEnv (
     val httpFileServer: HttpFileServer,
     val sparkFilesDir: String,
     val metricsSystem: MetricsSystem,
+    // TODO: unify these *MemoryManager classes (SPARK-10984)
+    val memoryManager: MemoryManager,
     val shuffleMemoryManager: ShuffleMemoryManager,
     val executorMemoryManager: ExecutorMemoryManager,
     val outputCommitCoordinator: OutputCommitCoordinator,
@@ -332,7 +335,8 @@ object SparkEnv extends Logging {
     val shuffleMgrClass = shortShuffleMgrNames.getOrElse(shuffleMgrName.toLowerCase, shuffleMgrName)
     val shuffleManager = instantiateClass[ShuffleManager](shuffleMgrClass)
 
-    val shuffleMemoryManager = ShuffleMemoryManager.create(conf, numUsableCores)
+    val memoryManager = new StaticMemoryManager(conf)
+    val shuffleMemoryManager = ShuffleMemoryManager.create(conf, memoryManager, numUsableCores)
 
     val blockTransferService = new NettyBlockTransferService(conf, securityManager, numUsableCores)
 
@@ -343,8 +347,8 @@ object SparkEnv extends Logging {
 
     // NB: blockManager is not valid until initialize() is called later.
     val blockManager = new BlockManager(executorId, rpcEnv, blockManagerMaster,
-      serializer, conf, mapOutputTracker, shuffleManager, blockTransferService, securityManager,
-      numUsableCores)
+      serializer, conf, memoryManager, mapOutputTracker, shuffleManager,
+      blockTransferService, securityManager, numUsableCores)
 
     val broadcastManager = new BroadcastManager(isDriver, conf, securityManager)
 
@@ -417,6 +421,7 @@ object SparkEnv extends Logging {
       httpFileServer,
       sparkFilesDir,
       metricsSystem,
+      memoryManager,
       shuffleMemoryManager,
       executorMemoryManager,
       outputCommitCoordinator,
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
new file mode 100644
index 000000000000..4bf73b696920
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
@@ -0,0 +1,117 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import scala.collection.mutable
+
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
+
+
+/**
+ * An abstract memory manager that enforces how memory is shared between execution and storage.
+ *
+ * In this context, execution memory refers to that used for computation in shuffles, joins,
+ * sorts and aggregations, while storage memory refers to that used for caching and propagating
+ * internal data across the cluster. There exists one of these per JVM.
+ */
+private[spark] abstract class MemoryManager {
+
+  // The memory store used to evict cached blocks
+  private var _memoryStore: MemoryStore = _
+  protected def memoryStore: MemoryStore = {
+    if (_memoryStore == null) {
+      throw new IllegalArgumentException("memory store not initialized yet")
+    }
+    _memoryStore
+  }
+
+  /**
+   * Set the [[MemoryStore]] used by this manager to evict cached blocks.
+   * This must be set after construction due to initialization ordering constraints.
+   */
+  def setMemoryStore(store: MemoryStore): Unit = {
+    _memoryStore = store
+  }
+
+  /**
+   * Acquire N bytes of memory for execution.
+   * @return number of bytes successfully granted (<= N).
+   */
+  def acquireExecutionMemory(numBytes: Long): Long
+
+  /**
+   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return whether all N bytes were successfully granted.
+   */
+  def acquireStorageMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean
+
+  /**
+   * Acquire N bytes of memory to unroll the given block, evicting existing ones if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return whether all N bytes were successfully granted.
+   */
+  def acquireUnrollMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean
+
+  /**
+   * Release N bytes of execution memory.
+   */
+  def releaseExecutionMemory(numBytes: Long): Unit
+
+  /**
+   * Release N bytes of storage memory.
+   */
+  def releaseStorageMemory(numBytes: Long): Unit
+
+  /**
+   * Release all storage memory acquired.
+   */
+  def releaseStorageMemory(): Unit
+
+  /**
+   * Release N bytes of unroll memory.
+   */
+  def releaseUnrollMemory(numBytes: Long): Unit
+
+  /**
+   * Total available memory for execution, in bytes.
+   */
+  def maxExecutionMemory: Long
+
+  /**
+   * Total available memory for storage, in bytes.
+   */
+  def maxStorageMemory: Long
+
+  /**
+   * Execution memory currently in use, in bytes.
+   */
+  def executionMemoryUsed: Long
+
+  /**
+   * Storage memory currently in use, in bytes.
+   */
+  def storageMemoryUsed: Long
+
+}
diff --git a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
new file mode 100644
index 000000000000..150445edb957
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
@@ -0,0 +1,202 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import scala.collection.mutable
+
+import org.apache.spark.{Logging, SparkConf}
+import org.apache.spark.storage.{BlockId, BlockStatus}
+
+
+/**
+ * A [[MemoryManager]] that statically partitions the heap space into disjoint regions.
+ *
+ * The sizes of the execution and storage regions are determined through
+ * `spark.shuffle.memoryFraction` and `spark.storage.memoryFraction` respectively. The two
+ * regions are cleanly separated such that neither usage can borrow memory from the other.
+ */
+private[spark] class StaticMemoryManager(
+    conf: SparkConf,
+    override val maxExecutionMemory: Long,
+    override val maxStorageMemory: Long)
+  extends MemoryManager with Logging {
+
+  // Max number of bytes worth of blocks to evict when unrolling
+  private val maxMemoryToEvictForUnroll: Long = {
+    (maxStorageMemory * conf.getDouble("spark.storage.unrollFraction", 0.2)).toLong
+  }
+
+  // Amount of execution / storage memory in use
+  // Accesses must be synchronized on `this`
+  private var _executionMemoryUsed: Long = 0
+  private var _storageMemoryUsed: Long = 0
+
+  def this(conf: SparkConf) {
+    this(
+      conf,
+      StaticMemoryManager.getMaxExecutionMemory(conf),
+      StaticMemoryManager.getMaxStorageMemory(conf))
+  }
+
+  /**
+   * Acquire N bytes of memory for execution.
+   * @return number of bytes successfully granted (<= N).
+   */
+  override def acquireExecutionMemory(numBytes: Long): Long = synchronized {
+    assert(_executionMemoryUsed <= maxExecutionMemory)
+    val bytesToGrant = math.min(numBytes, maxExecutionMemory - _executionMemoryUsed)
+    _executionMemoryUsed += bytesToGrant
+    bytesToGrant
+  }
+
+  /**
+   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return whether all N bytes were successfully granted.
+   */
+  override def acquireStorageMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    acquireStorageMemory(blockId, numBytes, numBytes, evictedBlocks)
+  }
+
+  /**
+   * Acquire N bytes of memory to unroll the given block, evicting existing ones if necessary.
+   *
+   * This evicts at most M bytes worth of existing blocks, where M is a fraction of the storage
+   * space specified by `spark.storage.unrollFraction`. Blocks evicted in the process, if any,
+   * are added to `evictedBlocks`.
+   *
+   * @return whether all N bytes were successfully granted.
+   */
+  override def acquireUnrollMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    val currentUnrollMemory = memoryStore.currentUnrollMemory
+    val maxNumBytesToFree = math.max(0, maxMemoryToEvictForUnroll - currentUnrollMemory)
+    val numBytesToFree = math.min(numBytes, maxNumBytesToFree)
+    acquireStorageMemory(blockId, numBytes, numBytesToFree, evictedBlocks)
+  }
+
+  /**
+   * Acquire N bytes of storage memory for the given block, evicting existing ones if necessary.
+   *
+   * @param blockId the ID of the block we are acquiring storage memory for
+   * @param numBytesToAcquire the size of this block
+   * @param numBytesToFree the size of space to be freed through evicting blocks
+   * @param evictedBlocks a holder for blocks evicted in the process
+   * @return whether all N bytes were successfully granted.
+   */
+  private def acquireStorageMemory(
+      blockId: BlockId,
+      numBytesToAcquire: Long,
+      numBytesToFree: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    // Note: Keep this outside synchronized block to avoid potential deadlocks!
+    memoryStore.ensureFreeSpace(blockId, numBytesToFree, evictedBlocks)
+    synchronized {
+      assert(_storageMemoryUsed <= maxStorageMemory)
+      val enoughMemory = _storageMemoryUsed + numBytesToAcquire <= maxStorageMemory
+      if (enoughMemory) {
+        _storageMemoryUsed += numBytesToAcquire
+      }
+      enoughMemory
+    }
+  }
+
+  /**
+   * Release N bytes of execution memory.
+   */
+  override def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
+    if (numBytes > _executionMemoryUsed) {
+      logWarning(s"Attempted to release $numBytes bytes of execution " +
+        s"memory when we only have ${_executionMemoryUsed} bytes")
+      _executionMemoryUsed = 0
+    } else {
+      _executionMemoryUsed -= numBytes
+    }
+  }
+
+  /**
+   * Release N bytes of storage memory.
+   */
+  override def releaseStorageMemory(numBytes: Long): Unit = synchronized {
+    if (numBytes > _storageMemoryUsed) {
+      logWarning(s"Attempted to release $numBytes bytes of storage " +
+        s"memory when we only have ${_storageMemoryUsed} bytes")
+      _storageMemoryUsed = 0
+    } else {
+      _storageMemoryUsed -= numBytes
+    }
+  }
+
+  /**
+   * Release all storage memory acquired.
+   */
+  override def releaseStorageMemory(): Unit = synchronized {
+    _storageMemoryUsed = 0
+  }
+
+  /**
+   * Release N bytes of unroll memory.
+   */
+  override def releaseUnrollMemory(numBytes: Long): Unit = {
+    releaseStorageMemory(numBytes)
+  }
+
+  /**
+   * Amount of execution memory currently in use, in bytes.
+   */
+  override def executionMemoryUsed: Long = synchronized {
+    _executionMemoryUsed
+  }
+
+  /**
+   * Amount of storage memory currently in use, in bytes.
+   */
+  override def storageMemoryUsed: Long = synchronized {
+    _storageMemoryUsed
+  }
+
+}
+
+
+private[spark] object StaticMemoryManager {
+
+  /**
+   * Return the total amount of memory available for the storage region, in bytes.
+   */
+  private def getMaxStorageMemory(conf: SparkConf): Long = {
+    val memoryFraction = conf.getDouble("spark.storage.memoryFraction", 0.6)
+    val safetyFraction = conf.getDouble("spark.storage.safetyFraction", 0.9)
+    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
+  }
+
+
+  /**
+   * Return the total amount of memory available for the execution region, in bytes.
+   */
+  private def getMaxExecutionMemory(conf: SparkConf): Long = {
+    val memoryFraction = conf.getDouble("spark.shuffle.memoryFraction", 0.2)
+    val safetyFraction = conf.getDouble("spark.shuffle.safetyFraction", 0.8)
+    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
index 9839c7640cc6..bb64bb3f35df 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
@@ -21,8 +21,9 @@ import scala.collection.mutable
 
 import com.google.common.annotations.VisibleForTesting
 
+import org.apache.spark._
+import org.apache.spark.memory.{StaticMemoryManager, MemoryManager}
 import org.apache.spark.unsafe.array.ByteArrayMethods
-import org.apache.spark.{Logging, SparkException, SparkConf, TaskContext}
 
 /**
  * Allocates a pool of memory to tasks for use in shuffle operations. Each disk-spilling
@@ -40,16 +41,17 @@ import org.apache.spark.{Logging, SparkException, SparkConf, TaskContext}
  *
  * Use `ShuffleMemoryManager.create()` factory method to create a new instance.
  *
- * @param maxMemory total amount of memory available for execution, in bytes.
+ * @param memoryManager the interface through which this manager acquires execution memory
  * @param pageSizeBytes number of bytes for each page, by default.
  */
 private[spark]
 class ShuffleMemoryManager protected (
-    val maxMemory: Long,
+    memoryManager: MemoryManager,
     val pageSizeBytes: Long)
   extends Logging {
 
   private val taskMemory = new mutable.HashMap[Long, Long]()  // taskAttemptId -> memory bytes
+  private val maxMemory = memoryManager.maxExecutionMemory
 
   private def currentTaskAttemptId(): Long = {
     // In case this is called on the driver, return an invalid task attempt id.
@@ -71,7 +73,7 @@ class ShuffleMemoryManager protected (
     // of active tasks, to let other tasks ramp down their memory in calls to tryToAcquire
     if (!taskMemory.contains(taskAttemptId)) {
       taskMemory(taskAttemptId) = 0L
-      notifyAll()  // Will later cause waiting tasks to wake up and check numThreads again
+      notifyAll()  // Will later cause waiting tasks to wake up and check numTasks again
     }
 
     // Keep looping until we're either sure that we don't want to grant this request (because this
@@ -85,46 +87,57 @@ class ShuffleMemoryManager protected (
       // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
       // don't let it be negative
       val maxToGrant = math.min(numBytes, math.max(0, (maxMemory / numActiveTasks) - curMem))
+      // Only give it as much memory as is free, which might be none if it reached 1 / numTasks
+      val toGrant = math.min(maxToGrant, freeMemory)
 
       if (curMem < maxMemory / (2 * numActiveTasks)) {
         // We want to let each task get at least 1 / (2 * numActiveTasks) before blocking;
         // if we can't give it this much now, wait for other tasks to free up memory
         // (this happens if older tasks allocated lots of memory before N grew)
         if (freeMemory >= math.min(maxToGrant, maxMemory / (2 * numActiveTasks) - curMem)) {
-          val toGrant = math.min(maxToGrant, freeMemory)
-          taskMemory(taskAttemptId) += toGrant
-          return toGrant
+          return acquire(toGrant)
         } else {
           logInfo(
             s"TID $taskAttemptId waiting for at least 1/2N of shuffle memory pool to be free")
           wait()
         }
       } else {
-        // Only give it as much memory as is free, which might be none if it reached 1 / numThreads
-        val toGrant = math.min(maxToGrant, freeMemory)
-        taskMemory(taskAttemptId) += toGrant
-        return toGrant
+        return acquire(toGrant)
       }
     }
     0L  // Never reached
   }
 
+  /**
+   * Acquire N bytes of execution memory from the memory manager for the current task.
+   * @return number of bytes actually acquired (<= N).
+   */
+  private def acquire(numBytes: Long): Long = synchronized {
+    val taskAttemptId = currentTaskAttemptId()
+    val acquired = memoryManager.acquireExecutionMemory(numBytes)
+    taskMemory(taskAttemptId) += acquired
+    acquired
+  }
+
   /** Release numBytes bytes for the current task. */
   def release(numBytes: Long): Unit = synchronized {
     val taskAttemptId = currentTaskAttemptId()
     val curMem = taskMemory.getOrElse(taskAttemptId, 0L)
     if (curMem < numBytes) {
       throw new SparkException(
-        s"Internal error: release called on ${numBytes} bytes but task only has ${curMem}")
+        s"Internal error: release called on $numBytes bytes but task only has $curMem")
     }
     taskMemory(taskAttemptId) -= numBytes
+    memoryManager.releaseExecutionMemory(numBytes)
     notifyAll()  // Notify waiters who locked "this" in tryToAcquire that memory has been freed
   }
 
   /** Release all memory for the current task and mark it as inactive (e.g. when a task ends). */
   def releaseMemoryForThisTask(): Unit = synchronized {
     val taskAttemptId = currentTaskAttemptId()
-    taskMemory.remove(taskAttemptId)
+    taskMemory.remove(taskAttemptId).foreach { numBytes =>
+      memoryManager.releaseExecutionMemory(numBytes)
+    }
     notifyAll()  // Notify waiters who locked "this" in tryToAcquire that memory has been freed
   }
 
@@ -138,30 +151,28 @@ class ShuffleMemoryManager protected (
 
 private[spark] object ShuffleMemoryManager {
 
-  def create(conf: SparkConf, numCores: Int): ShuffleMemoryManager = {
-    val maxMemory = ShuffleMemoryManager.getMaxMemory(conf)
+  def create(
+      conf: SparkConf,
+      memoryManager: MemoryManager,
+      numCores: Int): ShuffleMemoryManager = {
+    val maxMemory = memoryManager.maxExecutionMemory
     val pageSize = ShuffleMemoryManager.getPageSize(conf, maxMemory, numCores)
-    new ShuffleMemoryManager(maxMemory, pageSize)
+    new ShuffleMemoryManager(memoryManager, pageSize)
   }
 
+  /**
+   * Create a dummy [[ShuffleMemoryManager]] with the specified capacity and page size.
+   */
   def create(maxMemory: Long, pageSizeBytes: Long): ShuffleMemoryManager = {
-    new ShuffleMemoryManager(maxMemory, pageSizeBytes)
+    val conf = new SparkConf
+    val memoryManager = new StaticMemoryManager(
+      conf, maxExecutionMemory = maxMemory, maxStorageMemory = Long.MaxValue)
+    new ShuffleMemoryManager(memoryManager, pageSizeBytes)
   }
 
   @VisibleForTesting
   def createForTesting(maxMemory: Long): ShuffleMemoryManager = {
-    new ShuffleMemoryManager(maxMemory, 4 * 1024 * 1024)
-  }
-
-  /**
-   * Figure out the shuffle memory limit from a SparkConf. We currently have both a fraction
-   * of the memory pool and a safety factor since collections can sometimes grow bigger than
-   * the size we target before we estimate their sizes again.
-   */
-  private def getMaxMemory(conf: SparkConf): Long = {
-    val memoryFraction = conf.getDouble("spark.shuffle.memoryFraction", 0.2)
-    val safetyFraction = conf.getDouble("spark.shuffle.safetyFraction", 0.8)
-    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
+    create(maxMemory, 4 * 1024 * 1024)
   }
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index 47bd2ef8b294..9f5bd2abbdc5 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -31,6 +31,7 @@ import sun.nio.ch.DirectBuffer
 import org.apache.spark._
 import org.apache.spark.executor.{DataReadMethod, ShuffleWriteMetrics}
 import org.apache.spark.io.CompressionCodec
+import org.apache.spark.memory.MemoryManager
 import org.apache.spark.network._
 import org.apache.spark.network.buffer.{ManagedBuffer, NioManagedBuffer}
 import org.apache.spark.network.netty.SparkTransportConf
@@ -64,8 +65,8 @@ private[spark] class BlockManager(
     rpcEnv: RpcEnv,
     val master: BlockManagerMaster,
     defaultSerializer: Serializer,
-    maxMemory: Long,
     val conf: SparkConf,
+    memoryManager: MemoryManager,
     mapOutputTracker: MapOutputTracker,
     shuffleManager: ShuffleManager,
     blockTransferService: BlockTransferService,
@@ -82,12 +83,15 @@ private[spark] class BlockManager(
 
   // Actual storage of where blocks are kept
   private var externalBlockStoreInitialized = false
-  private[spark] val memoryStore = new MemoryStore(this, maxMemory)
+  private[spark] val memoryStore = new MemoryStore(this, memoryManager)
   private[spark] val diskStore = new DiskStore(this, diskBlockManager)
   private[spark] lazy val externalBlockStore: ExternalBlockStore = {
     externalBlockStoreInitialized = true
     new ExternalBlockStore(this, executorId)
   }
+  memoryManager.setMemoryStore(memoryStore)
+
+  private val maxMemory = memoryManager.maxStorageMemory
 
   private[spark]
   val externalShuffleServiceEnabled = conf.getBoolean("spark.shuffle.service.enabled", false)
@@ -157,24 +161,6 @@ private[spark] class BlockManager(
    * loaded yet. */
   private lazy val compressionCodec: CompressionCodec = CompressionCodec.createCodec(conf)
 
-  /**
-   * Construct a BlockManager with a memory limit set based on system properties.
-   */
-  def this(
-      execId: String,
-      rpcEnv: RpcEnv,
-      master: BlockManagerMaster,
-      serializer: Serializer,
-      conf: SparkConf,
-      mapOutputTracker: MapOutputTracker,
-      shuffleManager: ShuffleManager,
-      blockTransferService: BlockTransferService,
-      securityManager: SecurityManager,
-      numUsableCores: Int) = {
-    this(execId, rpcEnv, master, serializer, BlockManager.getMaxMemory(conf),
-      conf, mapOutputTracker, shuffleManager, blockTransferService, securityManager, numUsableCores)
-  }
-
   /**
    * Initializes the BlockManager with the given appId. This is not performed in the constructor as
    * the appId may not be known at BlockManager instantiation time (in particular for the driver,
@@ -1267,13 +1253,6 @@ private[spark] class BlockManager(
 private[spark] object BlockManager extends Logging {
   private val ID_GENERATOR = new IdGenerator
 
-  /** Return the total amount of storage memory available. */
-  private def getMaxMemory(conf: SparkConf): Long = {
-    val memoryFraction = conf.getDouble("spark.storage.memoryFraction", 0.6)
-    val safetyFraction = conf.getDouble("spark.storage.safetyFraction", 0.9)
-    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
-  }
-
   /**
    * Attempt to clean up a ByteBuffer if it is memory-mapped. This uses an *unsafe* Sun API that
    * might cause errors if one attempts to read from the unmapped buffer, but it's better than
diff --git a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
index 6f27f00307f8..35c57b923c43 100644
--- a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
+++ b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
@@ -24,6 +24,7 @@ import scala.collection.mutable
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.TaskContext
+import org.apache.spark.memory.MemoryManager
 import org.apache.spark.util.{SizeEstimator, Utils}
 import org.apache.spark.util.collection.SizeTrackingVector
 
@@ -33,13 +34,12 @@ private case class MemoryEntry(value: Any, size: Long, deserialized: Boolean)
  * Stores blocks in memory, either as Arrays of deserialized Java objects or as
  * serialized ByteBuffers.
  */
-private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
+private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: MemoryManager)
   extends BlockStore(blockManager) {
 
   private val conf = blockManager.conf
   private val entries = new LinkedHashMap[BlockId, MemoryEntry](32, 0.75f, true)
-
-  @volatile private var currentMemory = 0L
+  private val maxMemory = memoryManager.maxStorageMemory
 
   // Ensure only one thread is putting, and if necessary, dropping blocks at any given time
   private val accountingLock = new Object
@@ -56,15 +56,6 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
   // memory (SPARK-4777).
   private val pendingUnrollMemoryMap = mutable.HashMap[Long, Long]()
 
-  /**
-   * The amount of space ensured for unrolling values in memory, shared across all cores.
-   * This space is not reserved in advance, but allocated dynamically by dropping existing blocks.
-   */
-  private val maxUnrollMemory: Long = {
-    val unrollFraction = conf.getDouble("spark.storage.unrollFraction", 0.2)
-    (maxMemory * unrollFraction).toLong
-  }
-
   // Initial memory to request before unrolling any block
   private val unrollMemoryThreshold: Long =
     conf.getLong("spark.storage.unrollMemoryThreshold", 1024 * 1024)
@@ -77,8 +68,14 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
 
   logInfo("MemoryStore started with capacity %s".format(Utils.bytesToString(maxMemory)))
 
-  /** Free memory not occupied by existing blocks. Note that this does not include unroll memory. */
-  def freeMemory: Long = maxMemory - currentMemory
+  /** Total storage memory used including unroll memory, in bytes. */
+  private def memoryUsed: Long = memoryManager.storageMemoryUsed
+
+  /**
+   * Amount of storage memory, in bytes, used for caching blocks.
+   * This does not include memory used for unrolling.
+   */
+  private def blocksMemoryUsed: Long = memoryUsed - currentUnrollMemory
 
   override def getSize(blockId: BlockId): Long = {
     entries.synchronized {
@@ -94,8 +91,9 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
       val values = blockManager.dataDeserialize(blockId, bytes)
       putIterator(blockId, values, level, returnValues = true)
     } else {
-      val putAttempt = tryToPut(blockId, bytes, bytes.limit, deserialized = false)
-      PutResult(bytes.limit(), Right(bytes.duplicate()), putAttempt.droppedBlocks)
+      val droppedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+      tryToPut(blockId, bytes, bytes.limit, deserialized = false, droppedBlocks)
+      PutResult(bytes.limit(), Right(bytes.duplicate()), droppedBlocks)
     }
   }
 
@@ -108,15 +106,16 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
   def putBytes(blockId: BlockId, size: Long, _bytes: () => ByteBuffer): PutResult = {
     // Work on a duplicate - since the original input might be used elsewhere.
     lazy val bytes = _bytes().duplicate().rewind().asInstanceOf[ByteBuffer]
-    val putAttempt = tryToPut(blockId, () => bytes, size, deserialized = false)
+    val droppedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+    val putSuccess = tryToPut(blockId, () => bytes, size, deserialized = false, droppedBlocks)
     val data =
-      if (putAttempt.success) {
+      if (putSuccess) {
         assert(bytes.limit == size)
         Right(bytes.duplicate())
       } else {
         null
       }
-    PutResult(size, data, putAttempt.droppedBlocks)
+    PutResult(size, data, droppedBlocks)
   }
 
   override def putArray(
@@ -124,14 +123,15 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
       values: Array[Any],
       level: StorageLevel,
       returnValues: Boolean): PutResult = {
+    val droppedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
     if (level.deserialized) {
       val sizeEstimate = SizeEstimator.estimate(values.asInstanceOf[AnyRef])
-      val putAttempt = tryToPut(blockId, values, sizeEstimate, deserialized = true)
-      PutResult(sizeEstimate, Left(values.iterator), putAttempt.droppedBlocks)
+      tryToPut(blockId, values, sizeEstimate, deserialized = true, droppedBlocks)
+      PutResult(sizeEstimate, Left(values.iterator), droppedBlocks)
     } else {
       val bytes = blockManager.dataSerialize(blockId, values.iterator)
-      val putAttempt = tryToPut(blockId, bytes, bytes.limit, deserialized = false)
-      PutResult(bytes.limit(), Right(bytes.duplicate()), putAttempt.droppedBlocks)
+      tryToPut(blockId, bytes, bytes.limit, deserialized = false, droppedBlocks)
+      PutResult(bytes.limit(), Right(bytes.duplicate()), droppedBlocks)
     }
   }
 
@@ -209,23 +209,22 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
   }
 
   override def remove(blockId: BlockId): Boolean = {
-    entries.synchronized {
-      val entry = entries.remove(blockId)
-      if (entry != null) {
-        currentMemory -= entry.size
-        logDebug(s"Block $blockId of size ${entry.size} dropped from memory (free $freeMemory)")
-        true
-      } else {
-        false
-      }
+    val entry = entries.synchronized { entries.remove(blockId) }
+    if (entry != null) {
+      memoryManager.releaseStorageMemory(entry.size)
+      logDebug(s"Block $blockId of size ${entry.size} dropped " +
+        s"from memory (free ${maxMemory - blocksMemoryUsed})")
+      true
+    } else {
+      false
     }
   }
 
   override def clear() {
     entries.synchronized {
       entries.clear()
-      currentMemory = 0
     }
+    memoryManager.releaseStorageMemory()
     logInfo("MemoryStore cleared")
   }
 
@@ -265,7 +264,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
     var vector = new SizeTrackingVector[Any]
 
     // Request enough memory to begin unrolling
-    keepUnrolling = reserveUnrollMemoryForThisTask(initialMemoryThreshold)
+    keepUnrolling = reserveUnrollMemoryForThisTask(blockId, initialMemoryThreshold, droppedBlocks)
 
     if (!keepUnrolling) {
       logWarning(s"Failed to reserve initial memory threshold of " +
@@ -281,20 +280,8 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
           val currentSize = vector.estimateSize()
           if (currentSize >= memoryThreshold) {
             val amountToRequest = (currentSize * memoryGrowthFactor - memoryThreshold).toLong
-            // Hold the accounting lock, in case another thread concurrently puts a block that
-            // takes up the unrolling space we just ensured here
-            accountingLock.synchronized {
-              if (!reserveUnrollMemoryForThisTask(amountToRequest)) {
-                // If the first request is not granted, try again after ensuring free space
-                // If there is still not enough space, give up and drop the partition
-                val spaceToEnsure = maxUnrollMemory - currentUnrollMemory
-                if (spaceToEnsure > 0) {
-                  val result = ensureFreeSpace(blockId, spaceToEnsure)
-                  droppedBlocks ++= result.droppedBlocks
-                }
-                keepUnrolling = reserveUnrollMemoryForThisTask(amountToRequest)
-              }
-            }
+            keepUnrolling = reserveUnrollMemoryForThisTask(
+              blockId, amountToRequest, droppedBlocks)
             // New threshold is currentSize * memoryGrowthFactor
             memoryThreshold += amountToRequest
           }
@@ -317,10 +304,16 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
       // Otherwise, if we return an iterator, we release the memory reserved here
       // later when the task finishes.
       if (keepUnrolling) {
+        val taskAttemptId = currentTaskAttemptId()
         accountingLock.synchronized {
-          val amountToRelease = currentUnrollMemoryForThisTask - previousMemoryReserved
-          releaseUnrollMemoryForThisTask(amountToRelease)
-          reservePendingUnrollMemoryForThisTask(amountToRelease)
+          // Here, we transfer memory from unroll to pending unroll because we expect to cache this
+          // block in `tryToPut`. We do not release and re-acquire memory from the MemoryManager in
+          // order to avoid race conditions where another component steals the memory that we're
+          // trying to transfer.
+          val amountToTransferToPending = currentUnrollMemoryForThisTask - previousMemoryReserved
+          unrollMemoryMap(taskAttemptId) -= amountToTransferToPending
+          pendingUnrollMemoryMap(taskAttemptId) =
+            pendingUnrollMemoryMap.getOrElse(taskAttemptId, 0L) + amountToTransferToPending
         }
       }
     }
@@ -337,8 +330,9 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
       blockId: BlockId,
       value: Any,
       size: Long,
-      deserialized: Boolean): ResultWithDroppedBlocks = {
-    tryToPut(blockId, () => value, size, deserialized)
+      deserialized: Boolean,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    tryToPut(blockId, () => value, size, deserialized, droppedBlocks)
   }
 
   /**
@@ -354,13 +348,16 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
    * blocks to free memory for one block, another thread may use up the freed space for
    * another block.
    *
-   * Return whether put was successful, along with the blocks dropped in the process.
+   * All blocks evicted in the process, if any, will be added to `droppedBlocks`.
+   *
+   * @return whether put was successful.
    */
   private def tryToPut(
       blockId: BlockId,
       value: () => Any,
       size: Long,
-      deserialized: Boolean): ResultWithDroppedBlocks = {
+      deserialized: Boolean,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
 
     /* TODO: Its possible to optimize the locking by locking entries only when selecting blocks
      * to be dropped. Once the to-be-dropped blocks have been selected, and lock on entries has
@@ -368,24 +365,27 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
      * for freeing up more space for another block that needs to be put. Only then the actually
      * dropping of blocks (and writing to disk if necessary) can proceed in parallel. */
 
-    var putSuccess = false
-    val droppedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
-
     accountingLock.synchronized {
-      val freeSpaceResult = ensureFreeSpace(blockId, size)
-      val enoughFreeSpace = freeSpaceResult.success
-      droppedBlocks ++= freeSpaceResult.droppedBlocks
-
-      if (enoughFreeSpace) {
+      // Note: if we have previously unrolled this block successfully, then pending unroll
+      // memory should be non-zero. This is the amount that we already reserved during the
+      // unrolling process. In this case, we can just reuse this space to cache our block.
+      //
+      // Note: the StaticMemoryManager counts unroll memory as storage memory. Here, the
+      // synchronization on `accountingLock` guarantees that the release of unroll memory and
+      // acquisition of storage memory happens atomically. However, if storage memory is acquired
+      // outside of MemoryStore or if unroll memory is counted as execution memory, then we will
+      // have to revisit this assumption. See SPARK-10983 for more context.
+      releasePendingUnrollMemoryForThisTask()
+      val enoughMemory = memoryManager.acquireStorageMemory(blockId, size, droppedBlocks)
+      if (enoughMemory) {
+        // We acquired enough memory for the block, so go ahead and put it
         val entry = new MemoryEntry(value(), size, deserialized)
         entries.synchronized {
           entries.put(blockId, entry)
-          currentMemory += size
         }
         val valuesOrBytes = if (deserialized) "values" else "bytes"
         logInfo("Block %s stored as %s in memory (estimated size %s, free %s)".format(
-          blockId, valuesOrBytes, Utils.bytesToString(size), Utils.bytesToString(freeMemory)))
-        putSuccess = true
+          blockId, valuesOrBytes, Utils.bytesToString(size), Utils.bytesToString(blocksMemoryUsed)))
       } else {
         // Tell the block manager that we couldn't put it in memory so that it can drop it to
         // disk if the block allows disk storage.
@@ -397,10 +397,8 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
         val droppedBlockStatus = blockManager.dropFromMemory(blockId, () => data)
         droppedBlockStatus.foreach { status => droppedBlocks += ((blockId, status)) }
       }
-      // Release the unroll memory used because we no longer need the underlying Array
-      releasePendingUnrollMemoryForThisTask()
+      enoughMemory
     }
-    ResultWithDroppedBlocks(putSuccess, droppedBlocks)
   }
 
   /**
@@ -409,40 +407,42 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
    * from the same RDD (which leads to a wasteful cyclic replacement pattern for RDDs that
    * don't fit into memory that we want to avoid).
    *
-   * Assume that `accountingLock` is held by the caller to ensure only one thread is dropping
-   * blocks. Otherwise, the freed space may fill up before the caller puts in their new value.
-   *
-   * Return whether there is enough free space, along with the blocks dropped in the process.
+   * @param blockId the ID of the block we are freeing space for
+   * @param space the size of this block
+   * @param droppedBlocks a holder for blocks evicted in the process
+   * @return whether there is enough free space.
    */
-  private def ensureFreeSpace(
-      blockIdToAdd: BlockId,
-      space: Long): ResultWithDroppedBlocks = {
-    logInfo(s"ensureFreeSpace($space) called with curMem=$currentMemory, maxMem=$maxMemory")
-
-    val droppedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+  private[spark] def ensureFreeSpace(
+      blockId: BlockId,
+      space: Long,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    accountingLock.synchronized {
+      val freeMemory = maxMemory - memoryUsed
+      val rddToAdd = getRddId(blockId)
+      val selectedBlocks = new ArrayBuffer[BlockId]
+      var selectedMemory = 0L
 
-    if (space > maxMemory) {
-      logInfo(s"Will not store $blockIdToAdd as it is larger than our memory limit")
-      return ResultWithDroppedBlocks(success = false, droppedBlocks)
-    }
+      logInfo(s"Ensuring $space bytes of free space for block $blockId " +
+        s"(free: $freeMemory, max: $maxMemory)")
 
-    // Take into account the amount of memory currently occupied by unrolling blocks
-    // and minus the pending unroll memory for that block on current thread.
-    val taskAttemptId = currentTaskAttemptId()
-    val actualFreeMemory = freeMemory - currentUnrollMemory +
-      pendingUnrollMemoryMap.getOrElse(taskAttemptId, 0L)
+      // Fail fast if the block simply won't fit
+      if (space > maxMemory) {
+        logInfo(s"Will not store $blockId as the required space " +
+          s"($space bytes) than our memory limit ($maxMemory bytes)")
+        return false
+      }
 
-    if (actualFreeMemory < space) {
-      val rddToAdd = getRddId(blockIdToAdd)
-      val selectedBlocks = new ArrayBuffer[BlockId]
-      var selectedMemory = 0L
+      // No need to evict anything if there is already enough free space
+      if (freeMemory >= space) {
+        return true
+      }
 
       // This is synchronized to ensure that the set of entries is not changed
       // (because of getValue or getBytes) while traversing the iterator, as that
       // can lead to exceptions.
       entries.synchronized {
         val iterator = entries.entrySet().iterator()
-        while (actualFreeMemory + selectedMemory < space && iterator.hasNext) {
+        while (freeMemory + selectedMemory < space && iterator.hasNext) {
           val pair = iterator.next()
           val blockId = pair.getKey
           if (rddToAdd.isEmpty || rddToAdd != getRddId(blockId)) {
@@ -452,7 +452,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
         }
       }
 
-      if (actualFreeMemory + selectedMemory >= space) {
+      if (freeMemory + selectedMemory >= space) {
         logInfo(s"${selectedBlocks.size} blocks selected for dropping")
         for (blockId <- selectedBlocks) {
           val entry = entries.synchronized { entries.get(blockId) }
@@ -469,14 +469,13 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
             droppedBlockStatus.foreach { status => droppedBlocks += ((blockId, status)) }
           }
         }
-        return ResultWithDroppedBlocks(success = true, droppedBlocks)
+        true
       } else {
-        logInfo(s"Will not store $blockIdToAdd as it would require dropping another block " +
+        logInfo(s"Will not store $blockId as it would require dropping another block " +
           "from the same RDD")
-        return ResultWithDroppedBlocks(success = false, droppedBlocks)
+        false
       }
     }
-    ResultWithDroppedBlocks(success = true, droppedBlocks)
   }
 
   override def contains(blockId: BlockId): Boolean = {
@@ -489,17 +488,21 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
   }
 
   /**
-   * Reserve additional memory for unrolling blocks used by this task.
-   * Return whether the request is granted.
+   * Reserve memory for unrolling the given block for this task.
+   * @return whether the request is granted.
    */
-  def reserveUnrollMemoryForThisTask(memory: Long): Boolean = {
+  def reserveUnrollMemoryForThisTask(
+      blockId: BlockId,
+      memory: Long,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
     accountingLock.synchronized {
-      val granted = freeMemory > currentUnrollMemory + memory
-      if (granted) {
+      // Note: all acquisitions of unroll memory must be synchronized on `accountingLock`
+      val success = memoryManager.acquireUnrollMemory(blockId, memory, droppedBlocks)
+      if (success) {
         val taskAttemptId = currentTaskAttemptId()
         unrollMemoryMap(taskAttemptId) = unrollMemoryMap.getOrElse(taskAttemptId, 0L) + memory
       }
-      granted
+      success
     }
   }
 
@@ -507,40 +510,38 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
    * Release memory used by this task for unrolling blocks.
    * If the amount is not specified, remove the current task's allocation altogether.
    */
-  def releaseUnrollMemoryForThisTask(memory: Long = -1L): Unit = {
+  def releaseUnrollMemoryForThisTask(memory: Long = Long.MaxValue): Unit = {
     val taskAttemptId = currentTaskAttemptId()
     accountingLock.synchronized {
-      if (memory < 0) {
-        unrollMemoryMap.remove(taskAttemptId)
-      } else {
-        unrollMemoryMap(taskAttemptId) = unrollMemoryMap.getOrElse(taskAttemptId, memory) - memory
-        // If this task claims no more unroll memory, release it completely
-        if (unrollMemoryMap(taskAttemptId) <= 0) {
-          unrollMemoryMap.remove(taskAttemptId)
+      if (unrollMemoryMap.contains(taskAttemptId)) {
+        val memoryToRelease = math.min(memory, unrollMemoryMap(taskAttemptId))
+        if (memoryToRelease > 0) {
+          unrollMemoryMap(taskAttemptId) -= memoryToRelease
+          if (unrollMemoryMap(taskAttemptId) == 0) {
+            unrollMemoryMap.remove(taskAttemptId)
+          }
+          memoryManager.releaseUnrollMemory(memoryToRelease)
         }
       }
     }
   }
 
-  /**
-   * Reserve the unroll memory of current unroll successful block used by this task
-   * until actually put the block into memory entry.
-   */
-  def reservePendingUnrollMemoryForThisTask(memory: Long): Unit = {
-    val taskAttemptId = currentTaskAttemptId()
-    accountingLock.synchronized {
-       pendingUnrollMemoryMap(taskAttemptId) =
-         pendingUnrollMemoryMap.getOrElse(taskAttemptId, 0L) + memory
-    }
-  }
-
   /**
    * Release pending unroll memory of current unroll successful block used by this task
    */
-  def releasePendingUnrollMemoryForThisTask(): Unit = {
+  def releasePendingUnrollMemoryForThisTask(memory: Long = Long.MaxValue): Unit = {
     val taskAttemptId = currentTaskAttemptId()
     accountingLock.synchronized {
-      pendingUnrollMemoryMap.remove(taskAttemptId)
+      if (pendingUnrollMemoryMap.contains(taskAttemptId)) {
+        val memoryToRelease = math.min(memory, pendingUnrollMemoryMap(taskAttemptId))
+        if (memoryToRelease > 0) {
+          pendingUnrollMemoryMap(taskAttemptId) -= memoryToRelease
+          if (pendingUnrollMemoryMap(taskAttemptId) == 0) {
+            pendingUnrollMemoryMap.remove(taskAttemptId)
+          }
+          memoryManager.releaseUnrollMemory(memoryToRelease)
+        }
+      }
     }
   }
 
@@ -561,19 +562,16 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
   /**
    * Return the number of tasks currently unrolling blocks.
    */
-  def numTasksUnrolling: Int = accountingLock.synchronized { unrollMemoryMap.keys.size }
+  private def numTasksUnrolling: Int = accountingLock.synchronized { unrollMemoryMap.keys.size }
 
   /**
    * Log information about current memory usage.
    */
-  def logMemoryUsage(): Unit = {
-    val blocksMemory = currentMemory
-    val unrollMemory = currentUnrollMemory
-    val totalMemory = blocksMemory + unrollMemory
+  private def logMemoryUsage(): Unit = {
     logInfo(
-      s"Memory use = ${Utils.bytesToString(blocksMemory)} (blocks) + " +
-      s"${Utils.bytesToString(unrollMemory)} (scratch space shared across " +
-      s"$numTasksUnrolling tasks(s)) = ${Utils.bytesToString(totalMemory)}. " +
+      s"Memory use = ${Utils.bytesToString(blocksMemoryUsed)} (blocks) + " +
+      s"${Utils.bytesToString(currentUnrollMemory)} (scratch space shared across " +
+      s"$numTasksUnrolling tasks(s)) = ${Utils.bytesToString(memoryUsed)}. " +
       s"Storage limit = ${Utils.bytesToString(maxMemory)}."
     )
   }
@@ -584,7 +582,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
    * @param blockId ID of the block we are trying to unroll.
    * @param finalVectorSize Final size of the vector before unrolling failed.
    */
-  def logUnrollFailureMessage(blockId: BlockId, finalVectorSize: Long): Unit = {
+  private def logUnrollFailureMessage(blockId: BlockId, finalVectorSize: Long): Unit = {
     logWarning(
       s"Not enough space to cache $blockId in memory! " +
       s"(computed ${Utils.bytesToString(finalVectorSize)} so far)"
@@ -592,7 +590,3 @@ private[spark] class MemoryStore(blockManager: BlockManager, maxMemory: Long)
     logMemoryUsage()
   }
 }
-
-private[spark] case class ResultWithDroppedBlocks(
-    success: Boolean,
-    droppedBlocks: Seq[(BlockId, BlockStatus)])
diff --git a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
new file mode 100644
index 000000000000..c436a8b5c9f8
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
@@ -0,0 +1,172 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.mockito.Mockito.{mock, reset, verify, when}
+import org.mockito.Matchers.{any, eq => meq}
+
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, TestBlockId}
+import org.apache.spark.{SparkConf, SparkFunSuite}
+
+
+class StaticMemoryManagerSuite extends SparkFunSuite {
+  private val conf = new SparkConf().set("spark.storage.unrollFraction", "0.4")
+
+  test("basic execution memory") {
+    val maxExecutionMem = 1000L
+    val (mm, _) = makeThings(maxExecutionMem, Long.MaxValue)
+    assert(mm.executionMemoryUsed === 0L)
+    assert(mm.acquireExecutionMemory(10L) === 10L)
+    assert(mm.executionMemoryUsed === 10L)
+    assert(mm.acquireExecutionMemory(100L) === 100L)
+    // Acquire up to the max
+    assert(mm.acquireExecutionMemory(1000L) === 890L)
+    assert(mm.executionMemoryUsed === maxExecutionMem)
+    assert(mm.acquireExecutionMemory(1L) === 0L)
+    assert(mm.executionMemoryUsed === maxExecutionMem)
+    mm.releaseExecutionMemory(800L)
+    assert(mm.executionMemoryUsed === 200L)
+    // Acquire after release
+    assert(mm.acquireExecutionMemory(1L) === 1L)
+    assert(mm.executionMemoryUsed === 201L)
+    // Release beyond what was acquired
+    mm.releaseExecutionMemory(maxExecutionMem)
+    assert(mm.executionMemoryUsed === 0L)
+  }
+
+  test("basic storage memory") {
+    val maxStorageMem = 1000L
+    val dummyBlock = TestBlockId("you can see the world you brought to live")
+    val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+    val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.acquireStorageMemory(dummyBlock, 10L, evictedBlocks))
+    // `ensureFreeSpace` should be called with the number of bytes requested
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 10L)
+    assert(mm.storageMemoryUsed === 10L)
+    assert(evictedBlocks.isEmpty)
+    assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+    assert(mm.storageMemoryUsed === 110L)
+    // Acquire up to the max, not granted
+    assert(!mm.acquireStorageMemory(dummyBlock, 1000L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1000L)
+    assert(mm.storageMemoryUsed === 110L)
+    assert(mm.acquireStorageMemory(dummyBlock, 890L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 890L)
+    assert(mm.storageMemoryUsed === 1000L)
+    assert(!mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assert(mm.storageMemoryUsed === 1000L)
+    mm.releaseStorageMemory(800L)
+    assert(mm.storageMemoryUsed === 200L)
+    // Acquire after release
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assert(mm.storageMemoryUsed === 201L)
+    mm.releaseStorageMemory()
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assert(mm.storageMemoryUsed === 1L)
+    // Release beyond what was acquired
+    mm.releaseStorageMemory(100L)
+    assert(mm.storageMemoryUsed === 0L)
+  }
+
+  test("execution and storage isolation") {
+    val maxExecutionMem = 200L
+    val maxStorageMem = 1000L
+    val dummyBlock = TestBlockId("ain't nobody love like you do")
+    val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+    val (mm, ms) = makeThings(maxExecutionMem, maxStorageMem)
+    // Only execution memory should increase
+    assert(mm.acquireExecutionMemory(100L) === 100L)
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.executionMemoryUsed === 100L)
+    assert(mm.acquireExecutionMemory(1000L) === 100L)
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.executionMemoryUsed === 200L)
+    // Only storage memory should increase
+    assert(mm.acquireStorageMemory(dummyBlock, 50L, dummyBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 50L)
+    assert(mm.storageMemoryUsed === 50L)
+    assert(mm.executionMemoryUsed === 200L)
+    // Only execution memory should be released
+    mm.releaseExecutionMemory(133L)
+    assert(mm.storageMemoryUsed === 50L)
+    assert(mm.executionMemoryUsed === 67L)
+    // Only storage memory should be released
+    mm.releaseStorageMemory()
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.executionMemoryUsed === 67L)
+  }
+
+  test("unroll memory") {
+    val maxStorageMem = 1000L
+    val dummyBlock = TestBlockId("lonely water")
+    val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+    val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
+    assert(mm.acquireUnrollMemory(dummyBlock, 100L, dummyBlocks))
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+    assert(mm.storageMemoryUsed === 100L)
+    mm.releaseUnrollMemory(40L)
+    assert(mm.storageMemoryUsed === 60L)
+    when(ms.currentUnrollMemory).thenReturn(60L)
+    assert(mm.acquireUnrollMemory(dummyBlock, 500L, dummyBlocks))
+    // `spark.storage.unrollFraction` is 0.4, so the max unroll space is 400 bytes.
+    // Since we already occupy 60 bytes, we will try to ensure only 400 - 60 = 340 bytes.
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 340L)
+    assert(mm.storageMemoryUsed === 560L)
+    when(ms.currentUnrollMemory).thenReturn(560L)
+    assert(!mm.acquireUnrollMemory(dummyBlock, 800L, dummyBlocks))
+    assert(mm.storageMemoryUsed === 560L)
+    // We already have 560 bytes > the max unroll space of 400 bytes, so no bytes are freed
+    assertEnsureFreeSpaceCalled(ms, dummyBlock, 0L)
+    // Release beyond what was acquired
+    mm.releaseUnrollMemory(maxStorageMem)
+    assert(mm.storageMemoryUsed === 0L)
+  }
+
+  /**
+   * Make a [[StaticMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
+   */
+  private def makeThings(
+      maxExecutionMem: Long,
+      maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
+    val mm = new StaticMemoryManager(
+      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem)
+    val ms = mock(classOf[MemoryStore])
+    mm.setMemoryStore(ms)
+    (mm, ms)
+  }
+
+  /**
+   * Assert that [[MemoryStore.ensureFreeSpace]] is called with the given parameters.
+   */
+  private def assertEnsureFreeSpaceCalled(
+      ms: MemoryStore,
+      blockId: BlockId,
+      numBytes: Long): Unit = {
+    verify(ms).ensureFreeSpace(meq(blockId), meq(numBytes: java.lang.Long), any())
+    reset(ms)
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
index eb5af70d57ae..cc44c676b27a 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
@@ -29,6 +29,7 @@ import org.scalatest.concurrent.Eventually._
 import org.apache.spark.network.netty.NettyBlockTransferService
 import org.apache.spark.rpc.RpcEnv
 import org.apache.spark._
+import org.apache.spark.memory.StaticMemoryManager
 import org.apache.spark.network.BlockTransferService
 import org.apache.spark.scheduler.LiveListenerBus
 import org.apache.spark.serializer.KryoSerializer
@@ -39,29 +40,31 @@ import org.apache.spark.storage.StorageLevel._
 class BlockManagerReplicationSuite extends SparkFunSuite with Matchers with BeforeAndAfter {
 
   private val conf = new SparkConf(false).set("spark.app.id", "test")
-  var rpcEnv: RpcEnv = null
-  var master: BlockManagerMaster = null
-  val securityMgr = new SecurityManager(conf)
-  val mapOutputTracker = new MapOutputTrackerMaster(conf)
-  val shuffleManager = new HashShuffleManager(conf)
+  private var rpcEnv: RpcEnv = null
+  private var master: BlockManagerMaster = null
+  private val securityMgr = new SecurityManager(conf)
+  private val mapOutputTracker = new MapOutputTrackerMaster(conf)
+  private val shuffleManager = new HashShuffleManager(conf)
 
   // List of block manager created during an unit test, so that all of the them can be stopped
   // after the unit test.
-  val allStores = new ArrayBuffer[BlockManager]
+  private val allStores = new ArrayBuffer[BlockManager]
 
   // Reuse a serializer across tests to avoid creating a new thread-local buffer on each test
   conf.set("spark.kryoserializer.buffer", "1m")
-  val serializer = new KryoSerializer(conf)
+  private val serializer = new KryoSerializer(conf)
 
   // Implicitly convert strings to BlockIds for test clarity.
-  implicit def StringToBlockId(value: String): BlockId = new TestBlockId(value)
+  private implicit def StringToBlockId(value: String): BlockId = new TestBlockId(value)
 
   private def makeBlockManager(
       maxMem: Long,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val store = new BlockManager(name, rpcEnv, master, serializer, maxMem, conf,
-      mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
+    val store = new BlockManager(name, rpcEnv, master, serializer, conf,
+      memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
+    memManager.setMemoryStore(store.memoryStore)
     store.initialize("app-id")
     allStores += store
     store
@@ -258,8 +261,10 @@ class BlockManagerReplicationSuite extends SparkFunSuite with Matchers with Befo
     val failableTransfer = mock(classOf[BlockTransferService]) // this wont actually work
     when(failableTransfer.hostName).thenReturn("some-hostname")
     when(failableTransfer.port).thenReturn(1000)
-    val failableStore = new BlockManager("failable-store", rpcEnv, master, serializer,
-      10000, conf, mapOutputTracker, shuffleManager, failableTransfer, securityMgr, 0)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, 10000)
+    val failableStore = new BlockManager("failable-store", rpcEnv, master, serializer, conf,
+      memManager, mapOutputTracker, shuffleManager, failableTransfer, securityMgr, 0)
+    memManager.setMemoryStore(failableStore.memoryStore)
     failableStore.initialize("app-id")
     allStores += failableStore // so that this gets stopped after test
     assert(master.getPeers(store.blockManagerId).toSet === Set(failableStore.blockManagerId))
diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
index 34bb4952e724..f3fab33ca2e3 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
@@ -34,6 +34,7 @@ import org.apache.spark.network.netty.NettyBlockTransferService
 import org.apache.spark.rpc.RpcEnv
 import org.apache.spark._
 import org.apache.spark.executor.DataReadMethod
+import org.apache.spark.memory.StaticMemoryManager
 import org.apache.spark.scheduler.LiveListenerBus
 import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
 import org.apache.spark.shuffle.hash.HashShuffleManager
@@ -67,10 +68,12 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
       maxMem: Long,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val manager = new BlockManager(name, rpcEnv, master, serializer, maxMem, conf,
-      mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
-    manager.initialize("app-id")
-    manager
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
+    val blockManager = new BlockManager(name, rpcEnv, master, serializer, conf,
+      memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
+    memManager.setMemoryStore(blockManager.memoryStore)
+    blockManager.initialize("app-id")
+    blockManager
   }
 
   override def beforeEach(): Unit = {
@@ -820,9 +823,11 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
   test("block store put failure") {
     // Use Java serializer so we can create an unserializable error.
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
+    val memoryManager = new StaticMemoryManager(conf, Long.MaxValue, 1200)
     store = new BlockManager(SparkContext.DRIVER_IDENTIFIER, rpcEnv, master,
-      new JavaSerializer(conf), 1200, conf, mapOutputTracker, shuffleManager, transfer, securityMgr,
-      0)
+      new JavaSerializer(conf), conf, memoryManager, mapOutputTracker,
+      shuffleManager, transfer, securityMgr, 0)
+    memoryManager.setMemoryStore(store.memoryStore)
 
     // The put should fail since a1 is not serializable.
     class UnserializableClass
@@ -1043,14 +1048,19 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
     assert(memoryStore.currentUnrollMemory === 0)
     assert(memoryStore.currentUnrollMemoryForThisTask === 0)
 
+    def reserveUnrollMemoryForThisTask(memory: Long): Boolean = {
+      memoryStore.reserveUnrollMemoryForThisTask(
+        TestBlockId(""), memory, new ArrayBuffer[(BlockId, BlockStatus)])
+    }
+
     // Reserve
-    memoryStore.reserveUnrollMemoryForThisTask(100)
+    assert(reserveUnrollMemoryForThisTask(100))
     assert(memoryStore.currentUnrollMemoryForThisTask === 100)
-    memoryStore.reserveUnrollMemoryForThisTask(200)
+    assert(reserveUnrollMemoryForThisTask(200))
     assert(memoryStore.currentUnrollMemoryForThisTask === 300)
-    memoryStore.reserveUnrollMemoryForThisTask(500)
+    assert(reserveUnrollMemoryForThisTask(500))
     assert(memoryStore.currentUnrollMemoryForThisTask === 800)
-    memoryStore.reserveUnrollMemoryForThisTask(1000000)
+    assert(!reserveUnrollMemoryForThisTask(1000000))
     assert(memoryStore.currentUnrollMemoryForThisTask === 800) // not granted
     // Release
     memoryStore.releaseUnrollMemoryForThisTask(100)
@@ -1058,9 +1068,9 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
     memoryStore.releaseUnrollMemoryForThisTask(100)
     assert(memoryStore.currentUnrollMemoryForThisTask === 600)
     // Reserve again
-    memoryStore.reserveUnrollMemoryForThisTask(4400)
+    assert(reserveUnrollMemoryForThisTask(4400))
     assert(memoryStore.currentUnrollMemoryForThisTask === 5000)
-    memoryStore.reserveUnrollMemoryForThisTask(20000)
+    assert(!reserveUnrollMemoryForThisTask(20000))
     assert(memoryStore.currentUnrollMemoryForThisTask === 5000) // not granted
     // Release again
     memoryStore.releaseUnrollMemoryForThisTask(1000)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
index 48c3938ff87b..ff65d7bdf8b9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
@@ -17,12 +17,18 @@
 
 package org.apache.spark.sql.execution
 
+import scala.collection.mutable
+
+import org.apache.spark.memory.MemoryManager
 import org.apache.spark.shuffle.ShuffleMemoryManager
+import org.apache.spark.storage.{BlockId, BlockStatus}
+
 
 /**
  * A [[ShuffleMemoryManager]] that can be controlled to run out of memory.
  */
-class TestShuffleMemoryManager extends ShuffleMemoryManager(Long.MaxValue, 4 * 1024 * 1024) {
+class TestShuffleMemoryManager
+  extends ShuffleMemoryManager(new GrantEverythingMemoryManager, 4 * 1024 * 1024) {
   private var oom = false
 
   override def tryToAcquire(numBytes: Long): Long = {
@@ -49,3 +55,23 @@ class TestShuffleMemoryManager extends ShuffleMemoryManager(Long.MaxValue, 4 * 1
     oom = true
   }
 }
+
+private class GrantEverythingMemoryManager extends MemoryManager {
+  override def acquireExecutionMemory(numBytes: Long): Long = numBytes
+  override def acquireStorageMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
+  override def acquireUnrollMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
+  override def releaseExecutionMemory(numBytes: Long): Unit = { }
+  override def releaseStorageMemory(numBytes: Long): Unit = { }
+  override def releaseStorageMemory(): Unit = { }
+  override def releaseUnrollMemory(numBytes: Long): Unit = { }
+  override def maxExecutionMemory: Long = Long.MaxValue
+  override def maxStorageMemory: Long = Long.MaxValue
+  override def executionMemoryUsed: Long = Long.MaxValue
+  override def storageMemoryUsed: Long = Long.MaxValue
+}
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
index 13cfe29d7b30..b2b684871963 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
@@ -29,6 +29,7 @@ import org.scalatest.{BeforeAndAfter, Matchers}
 import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark._
+import org.apache.spark.memory.StaticMemoryManager
 import org.apache.spark.network.netty.NettyBlockTransferService
 import org.apache.spark.rpc.RpcEnv
 import org.apache.spark.scheduler.LiveListenerBus
@@ -253,12 +254,14 @@ class ReceivedBlockHandlerSuite
       maxMem: Long,
       conf: SparkConf,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val manager = new BlockManager(name, rpcEnv, blockManagerMaster, serializer, maxMem, conf,
-      mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
-    manager.initialize("app-id")
-    blockManagerBuffer += manager
-    manager
+    val blockManager = new BlockManager(name, rpcEnv, blockManagerMaster, serializer, conf,
+      memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
+    memManager.setMemoryStore(blockManager.memoryStore)
+    blockManager.initialize("app-id")
+    blockManagerBuffer += blockManager
+    blockManager
   }
 
   /**

From 5410747a84e9be1cea44159dfc2216d5e0728ab4 Mon Sep 17 00:00:00 2001
From: Bryan Cutler <bjcutler@us.ibm.com>
Date: Thu, 8 Oct 2015 22:21:07 -0700
Subject: [PATCH 196/896] [SPARK-10959] [PYSPARK]
 StreamingLogisticRegressionWithSGD does not train with given regParam and
 convergenceTol parameters

These params were being passed into the StreamingLogisticRegressionWithSGD constructor, but not transferred to the call for model training.  Same with StreamingLinearRegressionWithSGD.  I added the params as named arguments to the call and also fixed the intercept parameter, which was being passed as regularization value.

Author: Bryan Cutler <bjcutler@us.ibm.com>

Closes #9002 from BryanCutler/StreamingSGD-convergenceTol-bug-10959.
---
 python/pyspark/mllib/classification.py | 3 ++-
 python/pyspark/mllib/regression.py     | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/mllib/classification.py b/python/pyspark/mllib/classification.py
index cb4ee8367808..b77754500bde 100644
--- a/python/pyspark/mllib/classification.py
+++ b/python/pyspark/mllib/classification.py
@@ -639,7 +639,8 @@ def update(rdd):
             if not rdd.isEmpty():
                 self._model = LogisticRegressionWithSGD.train(
                     rdd, self.numIterations, self.stepSize,
-                    self.miniBatchFraction, self._model.weights)
+                    self.miniBatchFraction, self._model.weights,
+                    regParam=self.regParam, convergenceTol=self.convergenceTol)
 
         dstream.foreachRDD(update)
 
diff --git a/python/pyspark/mllib/regression.py b/python/pyspark/mllib/regression.py
index 256b7537fef6..961b5e80b013 100644
--- a/python/pyspark/mllib/regression.py
+++ b/python/pyspark/mllib/regression.py
@@ -679,7 +679,7 @@ def update(rdd):
                 self._model = LinearRegressionWithSGD.train(
                     rdd, self.numIterations, self.stepSize,
                     self.miniBatchFraction, self._model.weights,
-                    self._model.intercept)
+                    intercept=self._model.intercept, convergenceTol=self.convergenceTol)
 
         dstream.foreachRDD(update)
 

From 5994cfe81271a39294aa29fd47aa94c99aa56743 Mon Sep 17 00:00:00 2001
From: Nick Pritchard <nicholas.pritchard@falkonry.com>
Date: Thu, 8 Oct 2015 22:22:20 -0700
Subject: [PATCH 197/896] [SPARK-10875] [MLLIB] Computed covariance matrix
 should be symmetric

Compute upper triangular values of the covariance matrix, then copy to lower triangular values.

Author: Nick Pritchard <nicholas.pritchard@falkonry.com>

Closes #8940 from pnpritchard/SPARK-10875.
---
 .../mllib/linalg/distributed/RowMatrix.scala   |  6 ++++--
 .../linalg/distributed/RowMatrixSuite.scala    | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
index 7c7d900af3d5..b8a7adceb15b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
@@ -357,9 +357,11 @@ class RowMatrix @Since("1.0.0") (
     var alpha = 0.0
     while (i < n) {
       alpha = m / m1 * mean(i)
-      j = 0
+      j = i
       while (j < n) {
-        G(i, j) = G(i, j) / m1 - alpha * mean(j)
+        val Gij = G(i, j) / m1 - alpha * mean(j)
+        G(i, j) = Gij
+        G(j, i) = Gij
         j += 1
       }
       i += 1
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/RowMatrixSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/RowMatrixSuite.scala
index 283ffec1d49d..4abb98fb6fe4 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/RowMatrixSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/RowMatrixSuite.scala
@@ -24,6 +24,7 @@ import breeze.linalg.{DenseVector => BDV, DenseMatrix => BDM, norm => brzNorm, s
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.mllib.linalg.{Matrices, Vectors, Vector}
+import org.apache.spark.mllib.random.RandomRDDs
 import org.apache.spark.mllib.util.{LocalClusterSparkContext, MLlibTestSparkContext}
 
 class RowMatrixSuite extends SparkFunSuite with MLlibTestSparkContext {
@@ -255,6 +256,23 @@ class RowMatrixSuite extends SparkFunSuite with MLlibTestSparkContext {
       assert(closeToZero(abs(expected.r) - abs(rOnly.R.toBreeze.asInstanceOf[BDM[Double]])))
     }
   }
+
+  test("compute covariance") {
+    for (mat <- Seq(denseMat, sparseMat)) {
+      val result = mat.computeCovariance()
+      val expected = breeze.linalg.cov(mat.toBreeze())
+      assert(closeToZero(abs(expected) - abs(result.toBreeze.asInstanceOf[BDM[Double]])))
+    }
+  }
+
+  test("covariance matrix is symmetric (SPARK-10875)") {
+    val rdd = RandomRDDs.normalVectorRDD(sc, 100, 10, 0, 0)
+    val matrix = new RowMatrix(rdd)
+    val cov = matrix.computeCovariance()
+    for (i <- 0 until cov.numRows; j <- 0 until i) {
+      assert(cov(i, j) === cov(j, i))
+    }
+  }
 }
 
 class RowMatrixClusterSuite extends SparkFunSuite with LocalClusterSparkContext {

From 70f44ad2d836236c74e1336a7368982d5fe3abff Mon Sep 17 00:00:00 2001
From: Rerngvit Yanggratoke <rerngvit@kth.se>
Date: Fri, 9 Oct 2015 09:36:40 -0700
Subject: [PATCH 198/896] [SPARK-10905] [SPARKR] Export freqItems() for
 DataFrameStatFunctions

[SPARK-10905][SparkR]: Export freqItems() for DataFrameStatFunctions
- Add function (together with roxygen2 doc) to DataFrame.R and generics.R
- Expose the function in NAMESPACE
- Add unit test for the function

Author: Rerngvit Yanggratoke <rerngvit@kth.se>

Closes #8962 from rerngvit/SPARK-10905.
---
 R/pkg/NAMESPACE                  |  1 +
 R/pkg/R/generics.R               |  4 ++++
 R/pkg/R/stats.R                  | 27 +++++++++++++++++++++++++++
 R/pkg/inst/tests/test_sparkSQL.R | 21 +++++++++++++++++++++
 4 files changed, 53 insertions(+)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 9aad35469bbb..255be2e76ff4 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -40,6 +40,7 @@ exportMethods("arrange",
               "fillna",
               "filter",
               "first",
+              "freqItems",
               "group_by",
               "groupBy",
               "head",
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index e9086fdbd18c..c4474131804b 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -63,6 +63,10 @@ setGeneric("countByValue", function(x) { standardGeneric("countByValue") })
 # @export
 setGeneric("crosstab", function(x, col1, col2) { standardGeneric("crosstab") })
 
+# @rdname statfunctions
+# @export
+setGeneric("freqItems", function(x, cols, support = 0.01) { standardGeneric("freqItems") })
+
 # @rdname distinct
 # @export
 setGeneric("distinct", function(x, numPartitions = 1) { standardGeneric("distinct") })
diff --git a/R/pkg/R/stats.R b/R/pkg/R/stats.R
index 06382d55d086..4928cf4d4367 100644
--- a/R/pkg/R/stats.R
+++ b/R/pkg/R/stats.R
@@ -100,3 +100,30 @@ setMethod("corr",
             statFunctions <- callJMethod(x@sdf, "stat")
             callJMethod(statFunctions, "corr", col1, col2, method)
           })
+
+#' freqItems
+#'
+#' Finding frequent items for columns, possibly with false positives.
+#' Using the frequent element count algorithm described in
+#' \url{http://dx.doi.org/10.1145/762471.762473}, proposed by Karp, Schenker, and Papadimitriou.
+#'
+#' @param x A SparkSQL DataFrame.
+#' @param cols A vector column names to search frequent items in.
+#' @param support (Optional) The minimum frequency for an item to be considered `frequent`. 
+#'                Should be greater than 1e-4. Default support = 0.01.
+#' @return a local R data.frame with the frequent items in each column
+#'
+#' @rdname statfunctions
+#' @name freqItems
+#' @export
+#' @examples
+#' \dontrun{
+#' df <- jsonFile(sqlContext, "/path/to/file.json")
+#' fi = freqItems(df, c("title", "gender"))
+#' }
+setMethod("freqItems", signature(x = "DataFrame", cols = "character"),
+          function(x, cols, support = 0.01) {
+            statFunctions <- callJMethod(x@sdf, "stat")
+            sct <- callJMethod(statFunctions, "freqItems", as.list(cols), support)
+            collect(dataFrame(sct))
+          })
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index e85de2507085..4804ecf17734 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1350,6 +1350,27 @@ test_that("cov() and corr() on a DataFrame", {
   expect_true(abs(result - 1.0) < 1e-12)
 })
 
+test_that("freqItems() on a DataFrame", {
+  input <- 1:1000
+  rdf <- data.frame(numbers = input, letters = as.character(input),
+                    negDoubles = input * -1.0, stringsAsFactors = F)
+  rdf[ input %% 3 == 0, ] <- c(1, "1", -1)
+  df <- createDataFrame(sqlContext, rdf)
+  multiColResults <- freqItems(df, c("numbers", "letters"), support=0.1)
+  expect_true(1 %in% multiColResults$numbers[[1]])
+  expect_true("1" %in% multiColResults$letters[[1]])
+  singleColResult <- freqItems(df, "negDoubles", support=0.1)
+  expect_true(-1 %in% head(singleColResult$negDoubles)[[1]])
+
+  l <- lapply(c(0:99), function(i) {
+    if (i %% 2 == 0) { list(1L, -1.0) }
+    else { list(i, i * -1.0) }})
+  df <- createDataFrame(sqlContext, l, c("a", "b"))
+  result <- freqItems(df, c("a", "b"), 0.4)
+  expect_identical(result[[1]], list(list(1L, 99L)))
+  expect_identical(result[[2]], list(list(-1, -99)))
+})
+
 test_that("SQL error message is returned from JVM", {
   retError <- tryCatch(sql(sqlContext, "select * from blah"), error = function(e) e)
   expect_equal(grepl("Table Not Found: blah", retError), TRUE)

From 015f7ef503d5544f79512b6333326749a1f0c48b Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Fri, 9 Oct 2015 15:28:09 -0500
Subject: [PATCH 199/896] [SPARK-8673] [LAUNCHER] API and infrastructure for
 communicating with child apps.

This change adds an API that encapsulates information about an app
launched using the library. It also creates a socket-based communication
layer for apps that are launched as child processes; the launching
application listens for connections from launched apps, and once
communication is established, the channel can be used to send updates
to the launching app, or to send commands to the child app.

The change also includes hooks for local, standalone/client and yarn
masters.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #7052 from vanzin/SPARK-8673.
---
 .../spark/launcher/LauncherBackend.scala      | 119 ++++++
 .../cluster/SparkDeploySchedulerBackend.scala |  35 +-
 .../spark/scheduler/local/LocalBackend.scala  |  19 +-
 .../spark/launcher/SparkLauncherSuite.java    |  39 +-
 core/src/test/resources/log4j.properties      |  11 +-
 .../spark/launcher/LauncherBackendSuite.scala |  81 +++++
 launcher/pom.xml                              |   5 +
 .../launcher/AbstractCommandBuilder.java      |  38 +-
 .../spark/launcher/ChildProcAppHandle.java    | 159 ++++++++
 .../spark/launcher/LauncherConnection.java    | 110 ++++++
 .../spark/launcher/LauncherProtocol.java      |  93 +++++
 .../apache/spark/launcher/LauncherServer.java | 341 ++++++++++++++++++
 .../spark/launcher/NamedThreadFactory.java    |  40 ++
 .../spark/launcher/OutputRedirector.java      |  78 ++++
 .../apache/spark/launcher/SparkAppHandle.java | 126 +++++++
 .../apache/spark/launcher/SparkLauncher.java  | 106 +++++-
 .../launcher/SparkSubmitCommandBuilder.java   |  22 +-
 .../apache/spark/launcher/package-info.java   |  38 +-
 .../org/apache/spark/launcher/BaseSuite.java  |  32 ++
 .../spark/launcher/LauncherServerSuite.java   | 188 ++++++++++
 .../SparkSubmitCommandBuilderSuite.java       |   4 +-
 .../SparkSubmitOptionParserSuite.java         |   2 +-
 launcher/src/test/resources/log4j.properties  |  13 +-
 .../org/apache/spark/deploy/yarn/Client.scala |  43 ++-
 .../cluster/YarnClientSchedulerBackend.scala  |  10 +
 yarn/src/test/resources/log4j.properties      |   7 +-
 .../deploy/yarn/BaseYarnClusterSuite.scala    | 127 ++++---
 .../spark/deploy/yarn/YarnClusterSuite.scala  |  76 +++-
 .../yarn/YarnShuffleIntegrationSuite.scala    |   4 +-
 29 files changed, 1820 insertions(+), 146 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
 create mode 100644 core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/LauncherConnection.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/LauncherProtocol.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/NamedThreadFactory.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/OutputRedirector.java
 create mode 100644 launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
 create mode 100644 launcher/src/test/java/org/apache/spark/launcher/BaseSuite.java
 create mode 100644 launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java

diff --git a/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala b/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
new file mode 100644
index 000000000000..3ea984c501e0
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
@@ -0,0 +1,119 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher
+
+import java.net.{InetAddress, Socket}
+
+import org.apache.spark.SPARK_VERSION
+import org.apache.spark.launcher.LauncherProtocol._
+import org.apache.spark.util.ThreadUtils
+
+/**
+ * A class that can be used to talk to a launcher server. Users should extend this class to
+ * provide implementation for the abstract methods.
+ *
+ * See `LauncherServer` for an explanation of how launcher communication works.
+ */
+private[spark] abstract class LauncherBackend {
+
+  private var clientThread: Thread = _
+  private var connection: BackendConnection = _
+  private var lastState: SparkAppHandle.State = _
+  @volatile private var _isConnected = false
+
+  def connect(): Unit = {
+    val port = sys.env.get(LauncherProtocol.ENV_LAUNCHER_PORT).map(_.toInt)
+    val secret = sys.env.get(LauncherProtocol.ENV_LAUNCHER_SECRET)
+    if (port != None && secret != None) {
+      val s = new Socket(InetAddress.getLoopbackAddress(), port.get)
+      connection = new BackendConnection(s)
+      connection.send(new Hello(secret.get, SPARK_VERSION))
+      clientThread = LauncherBackend.threadFactory.newThread(connection)
+      clientThread.start()
+      _isConnected = true
+    }
+  }
+
+  def close(): Unit = {
+    if (connection != null) {
+      try {
+        connection.close()
+      } finally {
+        if (clientThread != null) {
+          clientThread.join()
+        }
+      }
+    }
+  }
+
+  def setAppId(appId: String): Unit = {
+    if (connection != null) {
+      connection.send(new SetAppId(appId))
+    }
+  }
+
+  def setState(state: SparkAppHandle.State): Unit = {
+    if (connection != null && lastState != state) {
+      connection.send(new SetState(state))
+      lastState = state
+    }
+  }
+
+  /** Return whether the launcher handle is still connected to this backend. */
+  def isConnected(): Boolean = _isConnected
+
+  /**
+   * Implementations should provide this method, which should try to stop the application
+   * as gracefully as possible.
+   */
+  protected def onStopRequest(): Unit
+
+  /**
+   * Callback for when the launcher handle disconnects from this backend.
+   */
+  protected def onDisconnected() : Unit = { }
+
+
+  private class BackendConnection(s: Socket) extends LauncherConnection(s) {
+
+    override protected def handle(m: Message): Unit = m match {
+      case _: Stop =>
+        onStopRequest()
+
+      case _ =>
+        throw new IllegalArgumentException(s"Unexpected message type: ${m.getClass().getName()}")
+    }
+
+    override def close(): Unit = {
+      try {
+        super.close()
+      } finally {
+        onDisconnected()
+        _isConnected = false
+      }
+    }
+
+  }
+
+}
+
+private object LauncherBackend {
+
+  val threadFactory = ThreadUtils.namedThreadFactory("LauncherBackend")
+
+}
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
index 27491ecf8b97..2625c3e7ac71 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
@@ -23,6 +23,7 @@ import org.apache.spark.rpc.RpcAddress
 import org.apache.spark.{Logging, SparkConf, SparkContext, SparkEnv}
 import org.apache.spark.deploy.{ApplicationDescription, Command}
 import org.apache.spark.deploy.client.{AppClient, AppClientListener}
+import org.apache.spark.launcher.{LauncherBackend, SparkAppHandle}
 import org.apache.spark.scheduler._
 import org.apache.spark.util.Utils
 
@@ -36,6 +37,9 @@ private[spark] class SparkDeploySchedulerBackend(
 
   private var client: AppClient = null
   private var stopping = false
+  private val launcherBackend = new LauncherBackend() {
+    override protected def onStopRequest(): Unit = stop(SparkAppHandle.State.KILLED)
+  }
 
   @volatile var shutdownCallback: SparkDeploySchedulerBackend => Unit = _
   @volatile private var appId: String = _
@@ -47,6 +51,7 @@ private[spark] class SparkDeploySchedulerBackend(
 
   override def start() {
     super.start()
+    launcherBackend.connect()
 
     // The endpoint for executors to talk to us
     val driverUrl = rpcEnv.uriOf(SparkEnv.driverActorSystemName,
@@ -87,24 +92,20 @@ private[spark] class SparkDeploySchedulerBackend(
       command, appUIAddress, sc.eventLogDir, sc.eventLogCodec, coresPerExecutor)
     client = new AppClient(sc.env.rpcEnv, masters, appDesc, this, conf)
     client.start()
+    launcherBackend.setState(SparkAppHandle.State.SUBMITTED)
     waitForRegistration()
+    launcherBackend.setState(SparkAppHandle.State.RUNNING)
   }
 
-  override def stop() {
-    stopping = true
-    super.stop()
-    client.stop()
-
-    val callback = shutdownCallback
-    if (callback != null) {
-      callback(this)
-    }
+  override def stop(): Unit = synchronized {
+    stop(SparkAppHandle.State.FINISHED)
   }
 
   override def connected(appId: String) {
     logInfo("Connected to Spark cluster with app ID " + appId)
     this.appId = appId
     notifyContext()
+    launcherBackend.setAppId(appId)
   }
 
   override def disconnected() {
@@ -117,6 +118,7 @@ private[spark] class SparkDeploySchedulerBackend(
   override def dead(reason: String) {
     notifyContext()
     if (!stopping) {
+      launcherBackend.setState(SparkAppHandle.State.KILLED)
       logError("Application has been killed. Reason: " + reason)
       try {
         scheduler.error(reason)
@@ -188,4 +190,19 @@ private[spark] class SparkDeploySchedulerBackend(
     registrationBarrier.release()
   }
 
+  private def stop(finalState: SparkAppHandle.State): Unit = synchronized {
+    stopping = true
+
+    launcherBackend.setState(finalState)
+    launcherBackend.close()
+
+    super.stop()
+    client.stop()
+
+    val callback = shutdownCallback
+    if (callback != null) {
+      callback(this)
+    }
+  }
+
 }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/local/LocalBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/local/LocalBackend.scala
index 4d48fcfea44e..c633d860ae6e 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/local/LocalBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/local/LocalBackend.scala
@@ -24,6 +24,7 @@ import java.nio.ByteBuffer
 import org.apache.spark.{Logging, SparkConf, SparkContext, SparkEnv, TaskState}
 import org.apache.spark.TaskState.TaskState
 import org.apache.spark.executor.{Executor, ExecutorBackend}
+import org.apache.spark.launcher.{LauncherBackend, SparkAppHandle}
 import org.apache.spark.rpc.{RpcCallContext, RpcEndpointRef, RpcEnv, ThreadSafeRpcEndpoint}
 import org.apache.spark.scheduler._
 import org.apache.spark.scheduler.cluster.ExecutorInfo
@@ -103,6 +104,9 @@ private[spark] class LocalBackend(
   private var localEndpoint: RpcEndpointRef = null
   private val userClassPath = getUserClasspath(conf)
   private val listenerBus = scheduler.sc.listenerBus
+  private val launcherBackend = new LauncherBackend() {
+    override def onStopRequest(): Unit = stop(SparkAppHandle.State.KILLED)
+  }
 
   /**
    * Returns a list of URLs representing the user classpath.
@@ -114,6 +118,8 @@ private[spark] class LocalBackend(
     userClassPathStr.map(_.split(File.pathSeparator)).toSeq.flatten.map(new File(_).toURI.toURL)
   }
 
+  launcherBackend.connect()
+
   override def start() {
     val rpcEnv = SparkEnv.get.rpcEnv
     val executorEndpoint = new LocalEndpoint(rpcEnv, userClassPath, scheduler, this, totalCores)
@@ -122,10 +128,12 @@ private[spark] class LocalBackend(
       System.currentTimeMillis,
       executorEndpoint.localExecutorId,
       new ExecutorInfo(executorEndpoint.localExecutorHostname, totalCores, Map.empty)))
+    launcherBackend.setAppId(appId)
+    launcherBackend.setState(SparkAppHandle.State.RUNNING)
   }
 
   override def stop() {
-    localEndpoint.ask(StopExecutor)
+    stop(SparkAppHandle.State.FINISHED)
   }
 
   override def reviveOffers() {
@@ -145,4 +153,13 @@ private[spark] class LocalBackend(
 
   override def applicationId(): String = appId
 
+  private def stop(finalState: SparkAppHandle.State): Unit = {
+    localEndpoint.ask(StopExecutor)
+    try {
+      launcherBackend.setState(finalState)
+    } finally {
+      launcherBackend.close()
+    }
+  }
+
 }
diff --git a/core/src/test/java/org/apache/spark/launcher/SparkLauncherSuite.java b/core/src/test/java/org/apache/spark/launcher/SparkLauncherSuite.java
index d0c26dd05679..aa15e792e2b2 100644
--- a/core/src/test/java/org/apache/spark/launcher/SparkLauncherSuite.java
+++ b/core/src/test/java/org/apache/spark/launcher/SparkLauncherSuite.java
@@ -27,6 +27,7 @@
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.slf4j.bridge.SLF4JBridgeHandler;
 import static org.junit.Assert.*;
 
 /**
@@ -34,7 +35,13 @@
  */
 public class SparkLauncherSuite {
 
+  static {
+    SLF4JBridgeHandler.removeHandlersForRootLogger();
+    SLF4JBridgeHandler.install();
+  }
+
   private static final Logger LOG = LoggerFactory.getLogger(SparkLauncherSuite.class);
+  private static final NamedThreadFactory TF = new NamedThreadFactory("SparkLauncherSuite-%d");
 
   @Test
   public void testSparkArgumentHandling() throws Exception {
@@ -94,14 +101,15 @@ public void testChildProcLauncher() throws Exception {
       .addSparkArg(opts.CONF,
         String.format("%s=-Dfoo=ShouldBeOverriddenBelow", SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS))
       .setConf(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS,
-        "-Dfoo=bar -Dtest.name=-testChildProcLauncher")
+        "-Dfoo=bar -Dtest.appender=childproc")
       .setConf(SparkLauncher.DRIVER_EXTRA_CLASSPATH, System.getProperty("java.class.path"))
       .addSparkArg(opts.CLASS, "ShouldBeOverriddenBelow")
       .setMainClass(SparkLauncherTestApp.class.getName())
       .addAppArgs("proc");
     final Process app = launcher.launch();
-    new Redirector("stdout", app.getInputStream()).start();
-    new Redirector("stderr", app.getErrorStream()).start();
+
+    new OutputRedirector(app.getInputStream(), TF);
+    new OutputRedirector(app.getErrorStream(), TF);
     assertEquals(0, app.waitFor());
   }
 
@@ -116,29 +124,4 @@ public static void main(String[] args) throws Exception {
 
   }
 
-  private static class Redirector extends Thread {
-
-    private final InputStream in;
-
-    Redirector(String name, InputStream in) {
-      this.in = in;
-      setName(name);
-      setDaemon(true);
-    }
-
-    @Override
-    public void run() {
-      try {
-        BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
-        String line;
-        while ((line = reader.readLine()) != null) {
-          LOG.warn(line);
-        }
-      } catch (Exception e) {
-        LOG.error("Error reading process output.", e);
-      }
-    }
-
-  }
-
 }
diff --git a/core/src/test/resources/log4j.properties b/core/src/test/resources/log4j.properties
index eb3b1999eb99..a54d27de91ed 100644
--- a/core/src/test/resources/log4j.properties
+++ b/core/src/test/resources/log4j.properties
@@ -16,13 +16,22 @@
 #
 
 # Set everything to be logged to the file target/unit-tests.log
-log4j.rootCategory=INFO, file
+test.appender=file
+log4j.rootCategory=INFO, ${test.appender}
 log4j.appender.file=org.apache.log4j.FileAppender
 log4j.appender.file.append=true
 log4j.appender.file.file=target/unit-tests.log
 log4j.appender.file.layout=org.apache.log4j.PatternLayout
 log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss.SSS} %t %p %c{1}: %m%n
 
+# Tests that launch java subprocesses can set the "test.appender" system property to
+# "console" to avoid having the child process's logs overwrite the unit test's
+# log file.
+log4j.appender.console=org.apache.log4j.ConsoleAppender
+log4j.appender.console.target=System.err
+log4j.appender.console.layout=org.apache.log4j.PatternLayout
+log4j.appender.console.layout.ConversionPattern=%t: %m%n
+
 # Ignore messages below warning level from Jetty, because it's a bit verbose
 log4j.logger.org.spark-project.jetty=WARN
 org.spark-project.jetty.LEVEL=WARN
diff --git a/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala b/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
new file mode 100644
index 000000000000..07e8869833e9
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher
+
+import java.util.concurrent.TimeUnit
+
+import scala.concurrent.duration._
+import scala.language.postfixOps
+
+import org.scalatest.Matchers
+import org.scalatest.concurrent.Eventually._
+
+import org.apache.spark._
+import org.apache.spark.launcher._
+
+class LauncherBackendSuite extends SparkFunSuite with Matchers {
+
+  private val tests = Seq(
+    "local" -> "local",
+    "standalone/client" -> "local-cluster[1,1,1024]")
+
+  tests.foreach { case (name, master) =>
+    test(s"$name: launcher handle") {
+      testWithMaster(master)
+    }
+  }
+
+  private def testWithMaster(master: String): Unit = {
+    val env = new java.util.HashMap[String, String]()
+    env.put("SPARK_PRINT_LAUNCH_COMMAND", "1")
+    val handle = new SparkLauncher(env)
+      .setSparkHome(sys.props("spark.test.home"))
+      .setConf(SparkLauncher.DRIVER_EXTRA_CLASSPATH, System.getProperty("java.class.path"))
+      .setConf("spark.ui.enabled", "false")
+      .setConf(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS, s"-Dtest.appender=console")
+      .setMaster(master)
+      .setAppResource("spark-internal")
+      .setMainClass(TestApp.getClass.getName().stripSuffix("$"))
+      .startApplication()
+
+    try {
+      eventually(timeout(10 seconds), interval(100 millis)) {
+        handle.getAppId() should not be (null)
+      }
+
+      handle.stop()
+
+      eventually(timeout(10 seconds), interval(100 millis)) {
+        handle.getState() should be (SparkAppHandle.State.KILLED)
+      }
+    } finally {
+      handle.kill()
+    }
+  }
+
+}
+
+object TestApp {
+
+  def main(args: Array[String]): Unit = {
+    new SparkContext(new SparkConf()).parallelize(Seq(1)).foreach { i =>
+      Thread.sleep(TimeUnit.SECONDS.toMillis(20))
+    }
+  }
+
+}
diff --git a/launcher/pom.xml b/launcher/pom.xml
index d595d74642ab..5739bfc16958 100644
--- a/launcher/pom.xml
+++ b/launcher/pom.xml
@@ -47,6 +47,11 @@
       <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>jul-to-slf4j</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
diff --git a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
index 610e8bdaaa63..cf3729b7febc 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
@@ -47,7 +47,7 @@ abstract class AbstractCommandBuilder {
   String javaHome;
   String mainClass;
   String master;
-  String propertiesFile;
+  protected String propertiesFile;
   final List<String> appArgs;
   final List<String> jars;
   final List<String> files;
@@ -55,6 +55,10 @@ abstract class AbstractCommandBuilder {
   final Map<String, String> childEnv;
   final Map<String, String> conf;
 
+  // The merged configuration for the application. Cached to avoid having to read / parse
+  // properties files multiple times.
+  private Map<String, String> effectiveConfig;
+
   public AbstractCommandBuilder() {
     this.appArgs = new ArrayList<String>();
     this.childEnv = new HashMap<String, String>();
@@ -257,12 +261,38 @@ String getSparkHome() {
     return path;
   }
 
+  String getenv(String key) {
+    return firstNonEmpty(childEnv.get(key), System.getenv(key));
+  }
+
+  void setPropertiesFile(String path) {
+    effectiveConfig = null;
+    this.propertiesFile = path;
+  }
+
+  Map<String, String> getEffectiveConfig() throws IOException {
+    if (effectiveConfig == null) {
+      if (propertiesFile == null) {
+        effectiveConfig = conf;
+      } else {
+        effectiveConfig = new HashMap<>(conf);
+        Properties p = loadPropertiesFile();
+        for (String key : p.stringPropertyNames()) {
+          if (!effectiveConfig.containsKey(key)) {
+            effectiveConfig.put(key, p.getProperty(key));
+          }
+        }
+      }
+    }
+    return effectiveConfig;
+  }
+
   /**
    * Loads the configuration file for the application, if it exists. This is either the
    * user-specified properties file, or the spark-defaults.conf file under the Spark configuration
    * directory.
    */
-  Properties loadPropertiesFile() throws IOException {
+  private Properties loadPropertiesFile() throws IOException {
     Properties props = new Properties();
     File propsFile;
     if (propertiesFile != null) {
@@ -294,10 +324,6 @@ Properties loadPropertiesFile() throws IOException {
     return props;
   }
 
-  String getenv(String key) {
-    return firstNonEmpty(childEnv.get(key), System.getenv(key));
-  }
-
   private String findAssembly() {
     String sparkHome = getSparkHome();
     File libdir;
diff --git a/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java b/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
new file mode 100644
index 000000000000..de50f14fbdc8
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
@@ -0,0 +1,159 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ThreadFactory;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Handle implementation for monitoring apps started as a child process.
+ */
+class ChildProcAppHandle implements SparkAppHandle {
+
+  private static final Logger LOG = Logger.getLogger(ChildProcAppHandle.class.getName());
+  private static final ThreadFactory REDIRECTOR_FACTORY =
+    new NamedThreadFactory("launcher-proc-%d");
+
+  private final String secret;
+  private final LauncherServer server;
+
+  private Process childProc;
+  private boolean disposed;
+  private LauncherConnection connection;
+  private List<Listener> listeners;
+  private State state;
+  private String appId;
+  private OutputRedirector redirector;
+
+  ChildProcAppHandle(String secret, LauncherServer server) {
+    this.secret = secret;
+    this.server = server;
+    this.state = State.UNKNOWN;
+  }
+
+  @Override
+  public synchronized void addListener(Listener l) {
+    if (listeners == null) {
+      listeners = new ArrayList<>();
+    }
+    listeners.add(l);
+  }
+
+  @Override
+  public State getState() {
+    return state;
+  }
+
+  @Override
+  public String getAppId() {
+    return appId;
+  }
+
+  @Override
+  public void stop() {
+    CommandBuilderUtils.checkState(connection != null, "Application is still not connected.");
+    try {
+      connection.send(new LauncherProtocol.Stop());
+    } catch (IOException ioe) {
+      throw new RuntimeException(ioe);
+    }
+  }
+
+  @Override
+  public synchronized void disconnect() {
+    if (!disposed) {
+      disposed = true;
+      if (connection != null) {
+        try {
+          connection.close();
+        } catch (IOException ioe) {
+          // no-op.
+        }
+      }
+      server.unregister(this);
+      if (redirector != null) {
+        redirector.stop();
+      }
+    }
+  }
+
+  @Override
+  public synchronized void kill() {
+    if (!disposed) {
+      disconnect();
+    }
+    if (childProc != null) {
+      childProc.destroy();
+      childProc = null;
+    }
+  }
+
+  String getSecret() {
+    return secret;
+  }
+
+  void setChildProc(Process childProc, String loggerName) {
+    this.childProc = childProc;
+    this.redirector = new OutputRedirector(childProc.getInputStream(), loggerName,
+      REDIRECTOR_FACTORY);
+  }
+
+  void setConnection(LauncherConnection connection) {
+    this.connection = connection;
+  }
+
+  LauncherServer getServer() {
+    return server;
+  }
+
+  LauncherConnection getConnection() {
+    return connection;
+  }
+
+  void setState(State s) {
+    if (!state.isFinal()) {
+      state = s;
+      fireEvent(false);
+    } else {
+      LOG.log(Level.WARNING, "Backend requested transition from final state {0} to {1}.",
+        new Object[] { state, s });
+    }
+  }
+
+  void setAppId(String appId) {
+    this.appId = appId;
+    fireEvent(true);
+  }
+
+  private synchronized void fireEvent(boolean isInfoChanged) {
+    if (listeners != null) {
+      for (Listener l : listeners) {
+        if (isInfoChanged) {
+          l.infoChanged(this);
+        } else {
+          l.stateChanged(this);
+        }
+      }
+    }
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/LauncherConnection.java b/launcher/src/main/java/org/apache/spark/launcher/LauncherConnection.java
new file mode 100644
index 000000000000..eec264909bbb
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/LauncherConnection.java
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.Closeable;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.net.Socket;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import static org.apache.spark.launcher.LauncherProtocol.*;
+
+/**
+ * Encapsulates a connection between a launcher server and client. This takes care of the
+ * communication (sending and receiving messages), while processing of messages is left for
+ * the implementations.
+ */
+abstract class LauncherConnection implements Closeable, Runnable {
+
+  private static final Logger LOG = Logger.getLogger(LauncherConnection.class.getName());
+
+  private final Socket socket;
+  private final ObjectOutputStream out;
+
+  private volatile boolean closed;
+
+  LauncherConnection(Socket socket) throws IOException {
+    this.socket = socket;
+    this.out = new ObjectOutputStream(socket.getOutputStream());
+    this.closed = false;
+  }
+
+  protected abstract void handle(Message msg) throws IOException;
+
+  @Override
+  public void run() {
+    try {
+      ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
+      while (!closed) {
+        Message msg = (Message) in.readObject();
+        handle(msg);
+      }
+    } catch (EOFException eof) {
+      // Remote side has closed the connection, just cleanup.
+      try {
+        close();
+      } catch (Exception unused) {
+        // no-op.
+      }
+    } catch (Exception e) {
+      if (!closed) {
+        LOG.log(Level.WARNING, "Error in inbound message handling.", e);
+        try {
+          close();
+        } catch (Exception unused) {
+          // no-op.
+        }
+      }
+    }
+  }
+
+  protected synchronized void send(Message msg) throws IOException {
+    try {
+      CommandBuilderUtils.checkState(!closed, "Disconnected.");
+      out.writeObject(msg);
+      out.flush();
+    } catch (IOException ioe) {
+      if (!closed) {
+        LOG.log(Level.WARNING, "Error when sending message.", ioe);
+        try {
+          close();
+        } catch (Exception unused) {
+          // no-op.
+        }
+      }
+      throw ioe;
+    }
+  }
+
+  @Override
+  public void close() throws IOException {
+    if (!closed) {
+      synchronized (this) {
+        if (!closed) {
+          closed = true;
+          socket.close();
+        }
+      }
+    }
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/LauncherProtocol.java b/launcher/src/main/java/org/apache/spark/launcher/LauncherProtocol.java
new file mode 100644
index 000000000000..50f136497ec1
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/LauncherProtocol.java
@@ -0,0 +1,93 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+import java.net.Socket;
+import java.util.Map;
+
+/**
+ * Message definitions for the launcher communication protocol. These messages must remain
+ * backwards-compatible, so that the launcher can talk to older versions of Spark that support
+ * the protocol.
+ */
+final class LauncherProtocol {
+
+  /** Environment variable where the server port is stored. */
+  static final String ENV_LAUNCHER_PORT = "_SPARK_LAUNCHER_PORT";
+
+  /** Environment variable where the secret for connecting back to the server is stored. */
+  static final String ENV_LAUNCHER_SECRET = "_SPARK_LAUNCHER_SECRET";
+
+  static class Message implements Serializable {
+
+  }
+
+  /**
+   * Hello message, sent from client to server.
+   */
+  static class Hello extends Message {
+
+    final String secret;
+    final String sparkVersion;
+
+    Hello(String secret, String version) {
+      this.secret = secret;
+      this.sparkVersion = version;
+    }
+
+  }
+
+  /**
+   * SetAppId message, sent from client to server.
+   */
+  static class SetAppId extends Message {
+
+    final String appId;
+
+    SetAppId(String appId) {
+      this.appId = appId;
+    }
+
+  }
+
+  /**
+   * SetState message, sent from client to server.
+   */
+  static class SetState extends Message {
+
+    final SparkAppHandle.State state;
+
+    SetState(SparkAppHandle.State state) {
+      this.state = state;
+    }
+
+  }
+
+  /**
+   * Stop message, send from server to client to stop the application.
+   */
+  static class Stop extends Message {
+
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
new file mode 100644
index 000000000000..c5fd40816d62
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
@@ -0,0 +1,341 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicLong;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import static org.apache.spark.launcher.LauncherProtocol.*;
+
+/**
+ * A server that listens locally for connections from client launched by the library. Each client
+ * has a secret that it needs to send to the server to identify itself and establish the session.
+ *
+ * I/O is currently blocking (one thread per client). Clients have a limited time to connect back
+ * to the server, otherwise the server will ignore the connection.
+ *
+ * === Architecture Overview ===
+ *
+ * The launcher server is used when Spark apps are launched as separate processes than the calling
+ * app. It looks more or less like the following:
+ *
+ *         -----------------------                       -----------------------
+ *         |      User App       |     spark-submit      |      Spark App      |
+ *         |                     |  -------------------> |                     |
+ *         |         ------------|                       |-------------        |
+ *         |         |           |        hello          |            |        |
+ *         |         | L. Server |<----------------------| L. Backend |        |
+ *         |         |           |                       |            |        |
+ *         |         -------------                       -----------------------
+ *         |               |     |                              ^
+ *         |               v     |                              |
+ *         |        -------------|                              |
+ *         |        |            |      <per-app channel>       |
+ *         |        | App Handle |<------------------------------
+ *         |        |            |
+ *         -----------------------
+ *
+ * The server is started on demand and remains active while there are active or outstanding clients,
+ * to avoid opening too many ports when multiple clients are launched. Each client is given a unique
+ * secret, and have a limited amount of time to connect back
+ * ({@link SparkLauncher#CHILD_CONNECTION_TIMEOUT}), at which point the server will throw away
+ * that client's state. A client is only allowed to connect back to the server once.
+ *
+ * The launcher server listens on the localhost only, so it doesn't need access controls (aside from
+ * the per-app secret) nor encryption. It thus requires that the launched app has a local process
+ * that communicates with the server. In cluster mode, this means that the client that launches the
+ * application must remain alive for the duration of the application (or until the app handle is
+ * disconnected).
+ */
+class LauncherServer implements Closeable {
+
+  private static final Logger LOG = Logger.getLogger(LauncherServer.class.getName());
+  private static final String THREAD_NAME_FMT = "LauncherServer-%d";
+  private static final long DEFAULT_CONNECT_TIMEOUT = 10000L;
+
+  /** For creating secrets used for communication with child processes. */
+  private static final SecureRandom RND = new SecureRandom();
+
+  private static volatile LauncherServer serverInstance;
+
+  /**
+   * Creates a handle for an app to be launched. This method will start a server if one hasn't been
+   * started yet. The server is shared for multiple handles, and once all handles are disposed of,
+   * the server is shut down.
+   */
+  static synchronized ChildProcAppHandle newAppHandle() throws IOException {
+    LauncherServer server = serverInstance != null ? serverInstance : new LauncherServer();
+    server.ref();
+    serverInstance = server;
+
+    String secret = server.createSecret();
+    while (server.pending.containsKey(secret)) {
+      secret = server.createSecret();
+    }
+
+    return server.newAppHandle(secret);
+  }
+
+  static LauncherServer getServerInstance() {
+    return serverInstance;
+  }
+
+  private final AtomicLong refCount;
+  private final AtomicLong threadIds;
+  private final ConcurrentMap<String, ChildProcAppHandle> pending;
+  private final List<ServerConnection> clients;
+  private final ServerSocket server;
+  private final Thread serverThread;
+  private final ThreadFactory factory;
+  private final Timer timeoutTimer;
+
+  private volatile boolean running;
+
+  private LauncherServer() throws IOException {
+    this.refCount = new AtomicLong(0);
+
+    ServerSocket server = new ServerSocket();
+    try {
+      server.setReuseAddress(true);
+      server.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
+
+      this.clients = new ArrayList<ServerConnection>();
+      this.threadIds = new AtomicLong();
+      this.factory = new NamedThreadFactory(THREAD_NAME_FMT);
+      this.pending = new ConcurrentHashMap<>();
+      this.timeoutTimer = new Timer("LauncherServer-TimeoutTimer", true);
+      this.server = server;
+      this.running = true;
+
+      this.serverThread = factory.newThread(new Runnable() {
+        @Override
+        public void run() {
+          acceptConnections();
+        }
+      });
+      serverThread.start();
+    } catch (IOException ioe) {
+      close();
+      throw ioe;
+    } catch (Exception e) {
+      close();
+      throw new IOException(e);
+    }
+  }
+
+  /**
+   * Creates a new app handle. The handle will wait for an incoming connection for a configurable
+   * amount of time, and if one doesn't arrive, it will transition to an error state.
+   */
+  ChildProcAppHandle newAppHandle(String secret) {
+    ChildProcAppHandle handle = new ChildProcAppHandle(secret, this);
+    ChildProcAppHandle existing = pending.putIfAbsent(secret, handle);
+    CommandBuilderUtils.checkState(existing == null, "Multiple handles with the same secret.");
+    return handle;
+  }
+
+  @Override
+  public void close() throws IOException {
+    synchronized (this) {
+      if (running) {
+        running = false;
+        timeoutTimer.cancel();
+        server.close();
+        synchronized (clients) {
+          List<ServerConnection> copy = new ArrayList<>(clients);
+          clients.clear();
+          for (ServerConnection client : copy) {
+            client.close();
+          }
+        }
+      }
+    }
+    if (serverThread != null) {
+      try {
+        serverThread.join();
+      } catch (InterruptedException ie) {
+        // no-op
+      }
+    }
+  }
+
+  void ref() {
+    refCount.incrementAndGet();
+  }
+
+  void unref() {
+    synchronized(LauncherServer.class) {
+      if (refCount.decrementAndGet() == 0) {
+        try {
+          close();
+        } catch (IOException ioe) {
+          // no-op.
+        } finally {
+          serverInstance = null;
+        }
+      }
+    }
+  }
+
+  int getPort() {
+    return server.getLocalPort();
+  }
+
+  /**
+   * Removes the client handle from the pending list (in case it's still there), and unrefs
+   * the server.
+   */
+  void unregister(ChildProcAppHandle handle) {
+    pending.remove(handle.getSecret());
+    unref();
+  }
+
+  private void acceptConnections() {
+    try {
+      while (running) {
+        final Socket client = server.accept();
+        TimerTask timeout = new TimerTask() {
+          @Override
+          public void run() {
+            LOG.warning("Timed out waiting for hello message from client.");
+            try {
+              client.close();
+            } catch (IOException ioe) {
+              // no-op.
+            }
+          }
+        };
+        ServerConnection clientConnection = new ServerConnection(client, timeout);
+        Thread clientThread = factory.newThread(clientConnection);
+        synchronized (timeout) {
+          clientThread.start();
+          synchronized (clients) {
+            clients.add(clientConnection);
+          }
+          timeoutTimer.schedule(timeout, getConnectionTimeout());
+        }
+      }
+    } catch (IOException ioe) {
+      if (running) {
+        LOG.log(Level.SEVERE, "Error in accept loop.", ioe);
+      }
+    }
+  }
+
+  private long getConnectionTimeout() {
+    String value = SparkLauncher.launcherConfig.get(SparkLauncher.CHILD_CONNECTION_TIMEOUT);
+    return (value != null) ? Long.parseLong(value) : DEFAULT_CONNECT_TIMEOUT;
+  }
+
+  private String createSecret() {
+    byte[] secret = new byte[128];
+    RND.nextBytes(secret);
+
+    StringBuilder sb = new StringBuilder();
+    for (byte b : secret) {
+      int ival = b >= 0 ? b : Byte.MAX_VALUE - b;
+      if (ival < 0x10) {
+        sb.append("0");
+      }
+      sb.append(Integer.toHexString(ival));
+    }
+    return sb.toString();
+  }
+
+  private class ServerConnection extends LauncherConnection {
+
+    private TimerTask timeout;
+    private ChildProcAppHandle handle;
+
+    ServerConnection(Socket socket, TimerTask timeout) throws IOException {
+      super(socket);
+      this.timeout = timeout;
+    }
+
+    @Override
+    protected void handle(Message msg) throws IOException {
+      try {
+        if (msg instanceof Hello) {
+          synchronized (timeout) {
+            timeout.cancel();
+          }
+          timeout = null;
+          Hello hello = (Hello) msg;
+          ChildProcAppHandle handle = pending.remove(hello.secret);
+          if (handle != null) {
+            handle.setState(SparkAppHandle.State.CONNECTED);
+            handle.setConnection(this);
+            this.handle = handle;
+          } else {
+            throw new IllegalArgumentException("Received Hello for unknown client.");
+          }
+        } else {
+          if (handle == null) {
+            throw new IllegalArgumentException("Expected hello, got: " +
+            msg != null ? msg.getClass().getName() : null);
+          }
+          if (msg instanceof SetAppId) {
+            SetAppId set = (SetAppId) msg;
+            handle.setAppId(set.appId);
+          } else if (msg instanceof SetState) {
+            handle.setState(((SetState)msg).state);
+          } else {
+            throw new IllegalArgumentException("Invalid message: " +
+              msg != null ? msg.getClass().getName() : null);
+          }
+        }
+      } catch (Exception e) {
+        LOG.log(Level.INFO, "Error handling message from client.", e);
+        if (timeout != null) {
+          timeout.cancel();
+        }
+        close();
+      } finally {
+        timeoutTimer.purge();
+      }
+    }
+
+    @Override
+    public void close() throws IOException {
+      synchronized (clients) {
+        clients.remove(this);
+      }
+      super.close();
+      if (handle != null) {
+        handle.disconnect();
+      }
+    }
+
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/NamedThreadFactory.java b/launcher/src/main/java/org/apache/spark/launcher/NamedThreadFactory.java
new file mode 100644
index 000000000000..995f4d73daaa
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/NamedThreadFactory.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicLong;
+
+class NamedThreadFactory implements ThreadFactory {
+
+  private final String nameFormat;
+  private final AtomicLong threadIds;
+
+  NamedThreadFactory(String nameFormat) {
+    this.nameFormat = nameFormat;
+    this.threadIds = new AtomicLong();
+  }
+
+  @Override
+  public Thread newThread(Runnable r) {
+    Thread t = new Thread(r, String.format(nameFormat, threadIds.incrementAndGet()));
+    t.setDaemon(true);
+    return t;
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/OutputRedirector.java b/launcher/src/main/java/org/apache/spark/launcher/OutputRedirector.java
new file mode 100644
index 000000000000..6e7120167d60
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/OutputRedirector.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.BufferedReader;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+import java.util.concurrent.ThreadFactory;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Redirects lines read from a given input stream to a j.u.l.Logger (at INFO level).
+ */
+class OutputRedirector {
+
+  private final BufferedReader reader;
+  private final Logger sink;
+  private final Thread thread;
+
+  private volatile boolean active;
+
+  OutputRedirector(InputStream in, ThreadFactory tf) {
+    this(in, OutputRedirector.class.getName(), tf);
+  }
+
+  OutputRedirector(InputStream in, String loggerName, ThreadFactory tf) {
+    this.active = true;
+    this.reader = new BufferedReader(new InputStreamReader(in));
+    this.thread = tf.newThread(new Runnable() {
+      @Override
+      public void run() {
+        redirect();
+      }
+    });
+    this.sink = Logger.getLogger(loggerName);
+    thread.start();
+  }
+
+  private void redirect() {
+    try {
+      String line;
+      while ((line = reader.readLine()) != null) {
+        if (active) {
+          sink.info(line.replaceFirst("\\s*$", ""));
+        }
+      }
+    } catch (IOException e) {
+      sink.log(Level.FINE, "Error reading child process output.", e);
+    }
+  }
+
+  /**
+   * This method just stops the output of the process from showing up in the local logs.
+   * The child's output will still be read (and, thus, the redirect thread will still be
+   * alive) to avoid the child process hanging because of lack of output buffer.
+   */
+  void stop() {
+    active = false;
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
new file mode 100644
index 000000000000..2896a91d5e79
--- /dev/null
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
@@ -0,0 +1,126 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+/**
+ * A handle to a running Spark application.
+ * <p/>
+ * Provides runtime information about the underlying Spark application, and actions to control it.
+ *
+ * @since 1.6.0
+ */
+public interface SparkAppHandle {
+
+  /**
+   * Represents the application's state. A state can be "final", in which case it will not change
+   * after it's reached, and means the application is not running anymore.
+   *
+   * @since 1.6.0
+   */
+  public enum State {
+    /** The application has not reported back yet. */
+    UNKNOWN(false),
+    /** The application has connected to the handle. */
+    CONNECTED(false),
+    /** The application has been submitted to the cluster. */
+    SUBMITTED(false),
+    /** The application is running. */
+    RUNNING(false),
+    /** The application finished with a successful status. */
+    FINISHED(true),
+    /** The application finished with a failed status. */
+    FAILED(true),
+    /** The application was killed. */
+    KILLED(true);
+
+    private final boolean isFinal;
+
+    State(boolean isFinal) {
+      this.isFinal = isFinal;
+    }
+
+    /**
+     * Whether this state is a final state, meaning the application is not running anymore
+     * once it's reached.
+     */
+    public boolean isFinal() {
+      return isFinal;
+    }
+  }
+
+  /**
+   * Adds a listener to be notified of changes to the handle's information. Listeners will be called
+   * from the thread processing updates from the application, so they should avoid blocking or
+   * long-running operations.
+   *
+   * @param l Listener to add.
+   */
+  void addListener(Listener l);
+
+  /** Returns the current application state. */
+  State getState();
+
+  /** Returns the application ID, or <code>null</code> if not yet known. */
+  String getAppId();
+
+  /**
+   * Asks the application to stop. This is best-effort, since the application may fail to receive
+   * or act on the command. Callers should watch for a state transition that indicates the
+   * application has really stopped.
+   */
+  void stop();
+
+  /**
+   * Tries to kill the underlying application. Implies {@link #disconnect()}. This will not send
+   * a {@link #stop()} message to the application, so it's recommended that users first try to
+   * stop the application cleanly and only resort to this method if that fails.
+   */
+  void kill();
+
+  /**
+   * Disconnects the handle from the application, without stopping it. After this method is called,
+   * the handle will not be able to communicate with the application anymore.
+   */
+  void disconnect();
+
+  /**
+   * Listener for updates to a handle's state. The callbacks do not receive information about
+   * what exactly has changed, just that an update has occurred.
+   *
+   * @since 1.6.0
+   */
+  public interface Listener {
+
+    /**
+     * Callback for changes in the handle's state.
+     *
+     * @param handle The updated handle.
+     * @see {@link SparkAppHandle#getState()}
+     */
+    void stateChanged(SparkAppHandle handle);
+
+    /**
+     * Callback for changes in any information that is not the handle's state.
+     *
+     * @param handle The updated handle.
+     */
+    void infoChanged(SparkAppHandle handle);
+
+  }
+
+}
diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java b/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
index 57993405e47b..5d74b37033a5 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
@@ -21,8 +21,10 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.apache.spark.launcher.CommandBuilderUtils.*;
 
@@ -58,6 +60,33 @@ public class SparkLauncher {
   /** Configuration key for the number of executor CPU cores. */
   public static final String EXECUTOR_CORES = "spark.executor.cores";
 
+  /** Logger name to use when launching a child process. */
+  public static final String CHILD_PROCESS_LOGGER_NAME = "spark.launcher.childProcLoggerName";
+
+  /**
+   * Maximum time (in ms) to wait for a child process to connect back to the launcher server
+   * when using @link{#start()}.
+   */
+  public static final String CHILD_CONNECTION_TIMEOUT = "spark.launcher.childConectionTimeout";
+
+  /** Used internally to create unique logger names. */
+  private static final AtomicInteger COUNTER = new AtomicInteger();
+
+  static final Map<String, String> launcherConfig = new HashMap<String, String>();
+
+  /**
+   * Set a configuration value for the launcher library. These config values do not affect the
+   * launched application, but rather the behavior of the launcher library itself when managing
+   * applications.
+   *
+   * @since 1.6.0
+   * @param name Config name.
+   * @param value Config value.
+   */
+  public static void setConfig(String name, String value) {
+    launcherConfig.put(name, value);
+  }
+
   // Visible for testing.
   final SparkSubmitCommandBuilder builder;
 
@@ -109,7 +138,7 @@ public SparkLauncher setSparkHome(String sparkHome) {
    */
   public SparkLauncher setPropertiesFile(String path) {
     checkNotNull(path, "path");
-    builder.propertiesFile = path;
+    builder.setPropertiesFile(path);
     return this;
   }
 
@@ -197,6 +226,7 @@ public SparkLauncher setMainClass(String mainClass) {
    * Use this method with caution. It is possible to create an invalid Spark command by passing
    * unknown arguments to this method, since those are allowed for forward compatibility.
    *
+   * @since 1.5.0
    * @param arg Argument to add.
    * @return This launcher.
    */
@@ -218,6 +248,7 @@ public SparkLauncher addSparkArg(String arg) {
    * Use this method with caution. It is possible to create an invalid Spark command by passing
    * unknown arguments to this method, since those are allowed for forward compatibility.
    *
+   * @since 1.5.0
    * @param name Name of argument to add.
    * @param value Value of the argument.
    * @return This launcher.
@@ -319,10 +350,81 @@ public SparkLauncher setVerbose(boolean verbose) {
 
   /**
    * Launches a sub-process that will start the configured Spark application.
+   * <p/>
+   * The {@link #startApplication(SparkAppHandle.Listener...)} method is preferred when launching
+   * Spark, since it provides better control of the child application.
    *
    * @return A process handle for the Spark app.
    */
   public Process launch() throws IOException {
+    return createBuilder().start();
+  }
+
+  /**
+   * Starts a Spark application.
+   * <p/>
+   * This method returns a handle that provides information about the running application and can
+   * be used to do basic interaction with it.
+   * <p/>
+   * The returned handle assumes that the application will instantiate a single SparkContext
+   * during its lifetime. Once that context reports a final state (one that indicates the
+   * SparkContext has stopped), the handle will not perform new state transitions, so anything
+   * that happens after that cannot be monitored. If the underlying application is launched as
+   * a child process, {@link SparkAppHandle#kill()} can still be used to kill the child process.
+   * <p/>
+   * Currently, all applications are launched as child processes. The child's stdout and stderr
+   * are merged and written to a logger (see <code>java.util.logging</code>). The logger's name
+   * can be defined by setting {@link #CHILD_PROCESS_LOGGER_NAME} in the app's configuration. If
+   * that option is not set, the code will try to derive a name from the application's name or
+   * main class / script file. If those cannot be determined, an internal, unique name will be
+   * used. In all cases, the logger name will start with "org.apache.spark.launcher.app", to fit
+   * more easily into the configuration of commonly-used logging systems.
+   *
+   * @since 1.6.0
+   * @param listeners Listeners to add to the handle before the app is launched.
+   * @return A handle for the launched application.
+   */
+  public SparkAppHandle startApplication(SparkAppHandle.Listener... listeners) throws IOException {
+    ChildProcAppHandle handle = LauncherServer.newAppHandle();
+    for (SparkAppHandle.Listener l : listeners) {
+      handle.addListener(l);
+    }
+
+    String appName = builder.getEffectiveConfig().get(CHILD_PROCESS_LOGGER_NAME);
+    if (appName == null) {
+      if (builder.appName != null) {
+        appName = builder.appName;
+      } else if (builder.mainClass != null) {
+        int dot = builder.mainClass.lastIndexOf(".");
+        if (dot >= 0 && dot < builder.mainClass.length() - 1) {
+          appName = builder.mainClass.substring(dot + 1, builder.mainClass.length());
+        } else {
+          appName = builder.mainClass;
+        }
+      } else if (builder.appResource != null) {
+        appName = new File(builder.appResource).getName();
+      } else {
+        appName = String.valueOf(COUNTER.incrementAndGet());
+      }
+    }
+
+    String loggerPrefix = getClass().getPackage().getName();
+    String loggerName = String.format("%s.app.%s", loggerPrefix, appName);
+    ProcessBuilder pb = createBuilder().redirectErrorStream(true);
+    pb.environment().put(LauncherProtocol.ENV_LAUNCHER_PORT,
+      String.valueOf(LauncherServer.getServerInstance().getPort()));
+    pb.environment().put(LauncherProtocol.ENV_LAUNCHER_SECRET, handle.getSecret());
+    try {
+      handle.setChildProc(pb.start(), loggerName);
+    } catch (IOException ioe) {
+      handle.kill();
+      throw ioe;
+    }
+
+    return handle;
+  }
+
+  private ProcessBuilder createBuilder() {
     List<String> cmd = new ArrayList<String>();
     String script = isWindows() ? "spark-submit.cmd" : "spark-submit";
     cmd.add(join(File.separator, builder.getSparkHome(), "bin", script));
@@ -343,7 +445,7 @@ public Process launch() throws IOException {
     for (Map.Entry<String, String> e : builder.childEnv.entrySet()) {
       pb.environment().put(e.getKey(), e.getValue());
     }
-    return pb.start();
+    return pb;
   }
 
   private static class ArgumentValidator extends SparkSubmitOptionParser {
diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
index fc87814a59ed..39b46e0db8cc 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
@@ -188,10 +188,9 @@ private List<String> buildSparkSubmitCommand(Map<String, String> env) throws IOE
     // Load the properties file and check whether spark-submit will be running the app's driver
     // or just launching a cluster app. When running the driver, the JVM's argument will be
     // modified to cover the driver's configuration.
-    Properties props = loadPropertiesFile();
-    boolean isClientMode = isClientMode(props);
-    String extraClassPath = isClientMode ?
-      firstNonEmptyValue(SparkLauncher.DRIVER_EXTRA_CLASSPATH, conf, props) : null;
+    Map<String, String> config = getEffectiveConfig();
+    boolean isClientMode = isClientMode(config);
+    String extraClassPath = isClientMode ? config.get(SparkLauncher.DRIVER_EXTRA_CLASSPATH) : null;
 
     List<String> cmd = buildJavaCommand(extraClassPath);
     // Take Thrift Server as daemon
@@ -212,14 +211,13 @@ private List<String> buildSparkSubmitCommand(Map<String, String> env) throws IOE
       // Take Thrift Server as daemon
       String tsMemory =
         isThriftServer(mainClass) ? System.getenv("SPARK_DAEMON_MEMORY") : null;
-      String memory = firstNonEmpty(tsMemory,
-        firstNonEmptyValue(SparkLauncher.DRIVER_MEMORY, conf, props),
+      String memory = firstNonEmpty(tsMemory, config.get(SparkLauncher.DRIVER_MEMORY),
         System.getenv("SPARK_DRIVER_MEMORY"), System.getenv("SPARK_MEM"), DEFAULT_MEM);
       cmd.add("-Xms" + memory);
       cmd.add("-Xmx" + memory);
-      addOptionString(cmd, firstNonEmptyValue(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS, conf, props));
+      addOptionString(cmd, config.get(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS));
       mergeEnvPathList(env, getLibPathEnvName(),
-        firstNonEmptyValue(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH, conf, props));
+        config.get(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH));
     }
 
     addPermGenSizeOpt(cmd);
@@ -281,9 +279,8 @@ private List<String> buildSparkRCommand(Map<String, String> env) throws IOExcept
   private void constructEnvVarArgs(
       Map<String, String> env,
       String submitArgsEnvVariable) throws IOException {
-    Properties props = loadPropertiesFile();
     mergeEnvPathList(env, getLibPathEnvName(),
-      firstNonEmptyValue(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH, conf, props));
+      getEffectiveConfig().get(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH));
 
     StringBuilder submitArgs = new StringBuilder();
     for (String arg : buildSparkSubmitArgs()) {
@@ -295,9 +292,8 @@ private void constructEnvVarArgs(
     env.put(submitArgsEnvVariable, submitArgs.toString());
   }
 
-
-  private boolean isClientMode(Properties userProps) {
-    String userMaster = firstNonEmpty(master, (String) userProps.get(SparkLauncher.SPARK_MASTER));
+  private boolean isClientMode(Map<String, String> userProps) {
+    String userMaster = firstNonEmpty(master, userProps.get(SparkLauncher.SPARK_MASTER));
     // Default master is "local[*]", so assume client mode in that case.
     return userMaster == null ||
       "client".equals(deployMode) ||
diff --git a/launcher/src/main/java/org/apache/spark/launcher/package-info.java b/launcher/src/main/java/org/apache/spark/launcher/package-info.java
index 7c97dba511b2..d1ac39bdc76a 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/package-info.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/package-info.java
@@ -17,17 +17,42 @@
 
 /**
  * Library for launching Spark applications.
- * 
+ *
  * <p>
  * This library allows applications to launch Spark programmatically. There's only one entry
  * point to the library - the {@link org.apache.spark.launcher.SparkLauncher} class.
  * </p>
  *
  * <p>
- * To launch a Spark application, just instantiate a {@link org.apache.spark.launcher.SparkLauncher}
- * and configure the application to run. For example:
+ * The {@link org.apache.spark.launcher.SparkLauncher#startApplication(
+ * org.apache.spark.launcher.SparkAppHandle.Listener...)} can be used to start Spark and provide
+ * a handle to monitor and control the running application:
  * </p>
- * 
+ *
+ * <pre>
+ * {@code
+ *   import org.apache.spark.launcher.SparkAppHandle;
+ *   import org.apache.spark.launcher.SparkLauncher;
+ *
+ *   public class MyLauncher {
+ *     public static void main(String[] args) throws Exception {
+ *       SparkAppHandle handle = new SparkLauncher()
+ *         .setAppResource("/my/app.jar")
+ *         .setMainClass("my.spark.app.Main")
+ *         .setMaster("local")
+ *         .setConf(SparkLauncher.DRIVER_MEMORY, "2g")
+ *         .startApplication();
+ *       // Use handle API to monitor / control application.
+ *     }
+ *   }
+ * }
+ * </pre>
+ *
+ * <p>
+ * It's also possible to launch a raw child process, using the
+ * {@link org.apache.spark.launcher.SparkLauncher#launch()} method:
+ * </p>
+ *
  * <pre>
  * {@code
  *   import org.apache.spark.launcher.SparkLauncher;
@@ -45,5 +70,10 @@
  *   }
  * }
  * </pre>
+ *
+ * <p>This method requires the calling code to manually manage the child process, including its
+ * output streams (to avoid possible deadlocks). It's recommended that
+ * {@link org.apache.spark.launcher.SparkLauncher#startApplication(
+ *   org.apache.spark.launcher.SparkAppHandle.Listener...)} be used instead.</p>
  */
 package org.apache.spark.launcher;
diff --git a/launcher/src/test/java/org/apache/spark/launcher/BaseSuite.java b/launcher/src/test/java/org/apache/spark/launcher/BaseSuite.java
new file mode 100644
index 000000000000..23e2c64d6dcd
--- /dev/null
+++ b/launcher/src/test/java/org/apache/spark/launcher/BaseSuite.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import org.slf4j.bridge.SLF4JBridgeHandler;
+
+/**
+ * Handles configuring the JUL -> SLF4J bridge.
+ */
+class BaseSuite {
+
+  static {
+    SLF4JBridgeHandler.removeHandlersForRootLogger();
+    SLF4JBridgeHandler.install();
+  }
+
+}
diff --git a/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java b/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java
new file mode 100644
index 000000000000..27cd1061a15b
--- /dev/null
+++ b/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java
@@ -0,0 +1,188 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.launcher;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+import static org.apache.spark.launcher.LauncherProtocol.*;
+
+public class LauncherServerSuite extends BaseSuite {
+
+  @Test
+  public void testLauncherServerReuse() throws Exception {
+    ChildProcAppHandle handle1 = null;
+    ChildProcAppHandle handle2 = null;
+    ChildProcAppHandle handle3 = null;
+
+    try {
+      handle1 = LauncherServer.newAppHandle();
+      handle2 = LauncherServer.newAppHandle();
+      LauncherServer server1 = handle1.getServer();
+      assertSame(server1, handle2.getServer());
+
+      handle1.kill();
+      handle2.kill();
+
+      handle3 = LauncherServer.newAppHandle();
+      assertNotSame(server1, handle3.getServer());
+
+      handle3.kill();
+
+      assertNull(LauncherServer.getServerInstance());
+    } finally {
+      kill(handle1);
+      kill(handle2);
+      kill(handle3);
+    }
+  }
+
+  @Test
+  public void testCommunication() throws Exception {
+    ChildProcAppHandle handle = LauncherServer.newAppHandle();
+    TestClient client = null;
+    try {
+      Socket s = new Socket(InetAddress.getLoopbackAddress(),
+        LauncherServer.getServerInstance().getPort());
+
+      final Object waitLock = new Object();
+      handle.addListener(new SparkAppHandle.Listener() {
+        @Override
+        public void stateChanged(SparkAppHandle handle) {
+          wakeUp();
+        }
+
+        @Override
+        public void infoChanged(SparkAppHandle handle) {
+          wakeUp();
+        }
+
+        private void wakeUp() {
+          synchronized (waitLock) {
+            waitLock.notifyAll();
+          }
+        }
+      });
+
+      client = new TestClient(s);
+      synchronized (waitLock) {
+        client.send(new Hello(handle.getSecret(), "1.4.0"));
+        waitLock.wait(TimeUnit.SECONDS.toMillis(10));
+      }
+
+      // Make sure the server matched the client to the handle.
+      assertNotNull(handle.getConnection());
+
+      synchronized (waitLock) {
+        client.send(new SetAppId("app-id"));
+        waitLock.wait(TimeUnit.SECONDS.toMillis(10));
+      }
+      assertEquals("app-id", handle.getAppId());
+
+      synchronized (waitLock) {
+        client.send(new SetState(SparkAppHandle.State.RUNNING));
+        waitLock.wait(TimeUnit.SECONDS.toMillis(10));
+      }
+      assertEquals(SparkAppHandle.State.RUNNING, handle.getState());
+
+      handle.stop();
+      Message stopMsg = client.inbound.poll(10, TimeUnit.SECONDS);
+      assertTrue(stopMsg instanceof Stop);
+    } finally {
+      kill(handle);
+      close(client);
+      client.clientThread.join();
+    }
+  }
+
+  @Test
+  public void testTimeout() throws Exception {
+    final long TEST_TIMEOUT = 10L;
+
+    ChildProcAppHandle handle = null;
+    TestClient client = null;
+    try {
+      SparkLauncher.setConfig(SparkLauncher.CHILD_CONNECTION_TIMEOUT, String.valueOf(TEST_TIMEOUT));
+
+      handle = LauncherServer.newAppHandle();
+
+      Socket s = new Socket(InetAddress.getLoopbackAddress(),
+        LauncherServer.getServerInstance().getPort());
+      client = new TestClient(s);
+
+      Thread.sleep(TEST_TIMEOUT * 10);
+      try {
+        client.send(new Hello(handle.getSecret(), "1.4.0"));
+        fail("Expected exception caused by connection timeout.");
+      } catch (IllegalStateException e) {
+        // Expected.
+      }
+    } finally {
+      SparkLauncher.launcherConfig.remove(SparkLauncher.CHILD_CONNECTION_TIMEOUT);
+      kill(handle);
+      close(client);
+    }
+  }
+
+  private void kill(SparkAppHandle handle) {
+    if (handle != null) {
+      handle.kill();
+    }
+  }
+
+  private void close(Closeable c) {
+    if (c != null) {
+      try {
+        c.close();
+      } catch (Exception e) {
+        // no-op.
+      }
+    }
+  }
+
+  private static class TestClient extends LauncherConnection {
+
+    final BlockingQueue<Message> inbound;
+    final Thread clientThread;
+
+    TestClient(Socket s) throws IOException {
+      super(s);
+      this.inbound = new LinkedBlockingQueue<Message>();
+      this.clientThread = new Thread(this);
+      clientThread.setName("TestClient");
+      clientThread.setDaemon(true);
+      clientThread.start();
+    }
+
+    @Override
+    protected void handle(Message msg) throws IOException {
+      inbound.offer(msg);
+    }
+
+  }
+
+}
diff --git a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
index 7329ac9f7fb8..d5397b068504 100644
--- a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
+++ b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
@@ -30,7 +30,7 @@
 import org.junit.Test;
 import static org.junit.Assert.*;
 
-public class SparkSubmitCommandBuilderSuite {
+public class SparkSubmitCommandBuilderSuite extends BaseSuite {
 
   private static File dummyPropsFile;
   private static SparkSubmitOptionParser parser;
@@ -161,7 +161,7 @@ private void testCmdBuilder(boolean isDriver) throws Exception {
     launcher.appResource = "/foo";
     launcher.appName = "MyApp";
     launcher.mainClass = "my.Class";
-    launcher.propertiesFile = dummyPropsFile.getAbsolutePath();
+    launcher.setPropertiesFile(dummyPropsFile.getAbsolutePath());
     launcher.appArgs.add("foo");
     launcher.appArgs.add("bar");
     launcher.conf.put(SparkLauncher.DRIVER_MEMORY, "1g");
diff --git a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitOptionParserSuite.java b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitOptionParserSuite.java
index f3d210991705..3ee5b8cf9689 100644
--- a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitOptionParserSuite.java
+++ b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitOptionParserSuite.java
@@ -28,7 +28,7 @@
 
 import static org.apache.spark.launcher.SparkSubmitOptionParser.*;
 
-public class SparkSubmitOptionParserSuite {
+public class SparkSubmitOptionParserSuite extends BaseSuite {
 
   private SparkSubmitOptionParser parser;
 
diff --git a/launcher/src/test/resources/log4j.properties b/launcher/src/test/resources/log4j.properties
index 67a6a9821711..c64b1565e146 100644
--- a/launcher/src/test/resources/log4j.properties
+++ b/launcher/src/test/resources/log4j.properties
@@ -16,16 +16,19 @@
 #
 
 # Set everything to be logged to the file core/target/unit-tests.log
-log4j.rootCategory=INFO, file
+test.appender=file
+log4j.rootCategory=INFO, ${test.appender}
 log4j.appender.file=org.apache.log4j.FileAppender
 log4j.appender.file.append=false
-
-# Some tests will set "test.name" to avoid overwriting the main log file.
-log4j.appender.file.file=target/unit-tests${test.name}.log
-
+log4j.appender.file.file=target/unit-tests.log
 log4j.appender.file.layout=org.apache.log4j.PatternLayout
 log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss.SSS} %t %p %c{1}: %m%n
 
+log4j.appender.childproc=org.apache.log4j.ConsoleAppender
+log4j.appender.childproc.target=System.err
+log4j.appender.childproc.layout=org.apache.log4j.PatternLayout
+log4j.appender.childproc.layout.ConversionPattern=%t: %m%n
+
 # Ignore messages below warning level from Jetty, because it's a bit verbose
 log4j.logger.org.spark-project.jetty=WARN
 org.spark-project.jetty.LEVEL=WARN
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index eb3b7fb88508..cec81b940644 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -55,8 +55,8 @@ import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException
 import org.apache.hadoop.yarn.util.Records
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkContext, SparkException}
+import org.apache.spark.launcher.{LauncherBackend, SparkAppHandle, YarnCommandBuilderUtils}
 import org.apache.spark.deploy.SparkHadoopUtil
-import org.apache.spark.launcher.YarnCommandBuilderUtils
 import org.apache.spark.util.Utils
 
 private[spark] class Client(
@@ -70,8 +70,6 @@ private[spark] class Client(
   def this(clientArgs: ClientArguments, spConf: SparkConf) =
     this(clientArgs, SparkHadoopUtil.get.newConfiguration(spConf), spConf)
 
-  def this(clientArgs: ClientArguments) = this(clientArgs, new SparkConf())
-
   private val yarnClient = YarnClient.createYarnClient
   private val yarnConf = new YarnConfiguration(hadoopConf)
   private var credentials: Credentials = null
@@ -84,10 +82,27 @@ private[spark] class Client(
   private var principal: String = null
   private var keytab: String = null
 
+  private val launcherBackend = new LauncherBackend() {
+    override def onStopRequest(): Unit = {
+      if (isClusterMode && appId != null) {
+        yarnClient.killApplication(appId)
+      } else {
+        setState(SparkAppHandle.State.KILLED)
+        stop()
+      }
+    }
+  }
   private val fireAndForget = isClusterMode &&
     !sparkConf.getBoolean("spark.yarn.submit.waitAppCompletion", true)
 
+  private var appId: ApplicationId = null
+
+  def reportLauncherState(state: SparkAppHandle.State): Unit = {
+    launcherBackend.setState(state)
+  }
+
   def stop(): Unit = {
+    launcherBackend.close()
     yarnClient.stop()
     // Unset YARN mode system env variable, to allow switching between cluster types.
     System.clearProperty("SPARK_YARN_MODE")
@@ -103,6 +118,7 @@ private[spark] class Client(
   def submitApplication(): ApplicationId = {
     var appId: ApplicationId = null
     try {
+      launcherBackend.connect()
       // Setup the credentials before doing anything else,
       // so we have don't have issues at any point.
       setupCredentials()
@@ -116,6 +132,8 @@ private[spark] class Client(
       val newApp = yarnClient.createApplication()
       val newAppResponse = newApp.getNewApplicationResponse()
       appId = newAppResponse.getApplicationId()
+      reportLauncherState(SparkAppHandle.State.SUBMITTED)
+      launcherBackend.setAppId(appId.toString())
 
       // Verify whether the cluster has enough resources for our AM
       verifyClusterResources(newAppResponse)
@@ -881,6 +899,20 @@ private[spark] class Client(
         }
       }
 
+      if (lastState != state) {
+        state match {
+          case YarnApplicationState.RUNNING =>
+            reportLauncherState(SparkAppHandle.State.RUNNING)
+          case YarnApplicationState.FINISHED =>
+            reportLauncherState(SparkAppHandle.State.FINISHED)
+          case YarnApplicationState.FAILED =>
+            reportLauncherState(SparkAppHandle.State.FAILED)
+          case YarnApplicationState.KILLED =>
+            reportLauncherState(SparkAppHandle.State.KILLED)
+          case _ =>
+        }
+      }
+
       if (state == YarnApplicationState.FINISHED ||
         state == YarnApplicationState.FAILED ||
         state == YarnApplicationState.KILLED) {
@@ -928,8 +960,8 @@ private[spark] class Client(
    * throw an appropriate SparkException.
    */
   def run(): Unit = {
-    val appId = submitApplication()
-    if (fireAndForget) {
+    this.appId = submitApplication()
+    if (!launcherBackend.isConnected() && fireAndForget) {
       val report = getApplicationReport(appId)
       val state = report.getYarnApplicationState
       logInfo(s"Application report for $appId (state: $state)")
@@ -971,6 +1003,7 @@ private[spark] class Client(
 }
 
 object Client extends Logging {
+
   def main(argStrings: Array[String]) {
     if (!sys.props.contains("SPARK_SUBMIT")) {
       logWarning("WARNING: This client is deprecated and will be removed in a " +
diff --git a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
index 36d5759554d9..20771f655473 100644
--- a/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
+++ b/yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
@@ -23,6 +23,7 @@ import org.apache.hadoop.yarn.api.records.{ApplicationId, YarnApplicationState}
 
 import org.apache.spark.{SparkException, Logging, SparkContext}
 import org.apache.spark.deploy.yarn.{Client, ClientArguments, YarnSparkHadoopUtil}
+import org.apache.spark.launcher.SparkAppHandle
 import org.apache.spark.scheduler.TaskSchedulerImpl
 
 private[spark] class YarnClientSchedulerBackend(
@@ -177,6 +178,15 @@ private[spark] class YarnClientSchedulerBackend(
     if (monitorThread != null) {
       monitorThread.stopMonitor()
     }
+
+    // Report a final state to the launcher if one is connected. This is needed since in client
+    // mode this backend doesn't let the app monitor loop run to completion, so it does not report
+    // the final state itself.
+    //
+    // Note: there's not enough information at this point to provide a better final state,
+    // so assume the application was successful.
+    client.reportLauncherState(SparkAppHandle.State.FINISHED)
+
     super.stop()
     YarnSparkHadoopUtil.get.stopExecutorDelegationTokenRenewer()
     client.stop()
diff --git a/yarn/src/test/resources/log4j.properties b/yarn/src/test/resources/log4j.properties
index 6b8a5dbf6373..6b9a799954bf 100644
--- a/yarn/src/test/resources/log4j.properties
+++ b/yarn/src/test/resources/log4j.properties
@@ -23,6 +23,9 @@ log4j.appender.file.file=target/unit-tests.log
 log4j.appender.file.layout=org.apache.log4j.PatternLayout
 log4j.appender.file.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss.SSS} %t %p %c{1}: %m%n
 
-# Ignore messages below warning level from Jetty, because it's a bit verbose
-log4j.logger.org.spark-project.jetty=WARN
+# Ignore messages below warning level from a few verbose libraries.
+log4j.logger.com.sun.jersey=WARN
 log4j.logger.org.apache.hadoop=WARN
+log4j.logger.org.eclipse.jetty=WARN
+log4j.logger.org.mortbay=WARN
+log4j.logger.org.spark-project.jetty=WARN
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/BaseYarnClusterSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/BaseYarnClusterSuite.scala
index 17c59ff06e0c..12494b01054b 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/BaseYarnClusterSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/BaseYarnClusterSuite.scala
@@ -22,15 +22,18 @@ import java.util.Properties
 import java.util.concurrent.TimeUnit
 
 import scala.collection.JavaConverters._
+import scala.concurrent.duration._
+import scala.language.postfixOps
 
 import com.google.common.base.Charsets.UTF_8
 import com.google.common.io.Files
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 import org.apache.hadoop.yarn.server.MiniYARNCluster
 import org.scalatest.{BeforeAndAfterAll, Matchers}
+import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark._
-import org.apache.spark.launcher.TestClasspathBuilder
+import org.apache.spark.launcher._
 import org.apache.spark.util.Utils
 
 abstract class BaseYarnClusterSuite
@@ -46,13 +49,14 @@ abstract class BaseYarnClusterSuite
     |log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
     |log4j.logger.org.apache.hadoop=WARN
     |log4j.logger.org.eclipse.jetty=WARN
+    |log4j.logger.org.mortbay=WARN
     |log4j.logger.org.spark-project.jetty=WARN
     """.stripMargin
 
   private var yarnCluster: MiniYARNCluster = _
   protected var tempDir: File = _
   private var fakeSparkJar: File = _
-  private var hadoopConfDir: File = _
+  protected var hadoopConfDir: File = _
   private var logConfDir: File = _
 
   def newYarnConfig(): YarnConfiguration
@@ -120,15 +124,77 @@ abstract class BaseYarnClusterSuite
       clientMode: Boolean,
       klass: String,
       appArgs: Seq[String] = Nil,
-      sparkArgs: Seq[String] = Nil,
+      sparkArgs: Seq[(String, String)] = Nil,
       extraClassPath: Seq[String] = Nil,
       extraJars: Seq[String] = Nil,
       extraConf: Map[String, String] = Map(),
-      extraEnv: Map[String, String] = Map()): Unit = {
+      extraEnv: Map[String, String] = Map()): SparkAppHandle.State = {
     val master = if (clientMode) "yarn-client" else "yarn-cluster"
-    val props = new Properties()
+    val propsFile = createConfFile(extraClassPath = extraClassPath, extraConf = extraConf)
+    val env = Map("YARN_CONF_DIR" -> hadoopConfDir.getAbsolutePath()) ++ extraEnv
+
+    val launcher = new SparkLauncher(env.asJava)
+    if (klass.endsWith(".py")) {
+      launcher.setAppResource(klass)
+    } else {
+      launcher.setMainClass(klass)
+      launcher.setAppResource(fakeSparkJar.getAbsolutePath())
+    }
+    launcher.setSparkHome(sys.props("spark.test.home"))
+      .setMaster(master)
+      .setConf("spark.executor.instances", "1")
+      .setPropertiesFile(propsFile)
+      .addAppArgs(appArgs.toArray: _*)
+
+    sparkArgs.foreach { case (name, value) =>
+      if (value != null) {
+        launcher.addSparkArg(name, value)
+      } else {
+        launcher.addSparkArg(name)
+      }
+    }
+    extraJars.foreach(launcher.addJar)
 
-    props.setProperty("spark.yarn.jar", "local:" + fakeSparkJar.getAbsolutePath())
+    val handle = launcher.startApplication()
+    try {
+      eventually(timeout(2 minutes), interval(1 second)) {
+        assert(handle.getState().isFinal())
+      }
+    } finally {
+      handle.kill()
+    }
+
+    handle.getState()
+  }
+
+  /**
+   * This is a workaround for an issue with yarn-cluster mode: the Client class will not provide
+   * any sort of error when the job process finishes successfully, but the job itself fails. So
+   * the tests enforce that something is written to a file after everything is ok to indicate
+   * that the job succeeded.
+   */
+  protected def checkResult(finalState: SparkAppHandle.State, result: File): Unit = {
+    checkResult(finalState, result, "success")
+  }
+
+  protected def checkResult(
+      finalState: SparkAppHandle.State,
+      result: File,
+      expected: String): Unit = {
+    finalState should be (SparkAppHandle.State.FINISHED)
+    val resultString = Files.toString(result, UTF_8)
+    resultString should be (expected)
+  }
+
+  protected def mainClassName(klass: Class[_]): String = {
+    klass.getName().stripSuffix("$")
+  }
+
+  protected def createConfFile(
+      extraClassPath: Seq[String] = Nil,
+      extraConf: Map[String, String] = Map()): String = {
+    val props = new Properties()
+    props.put("spark.yarn.jar", "local:" + fakeSparkJar.getAbsolutePath())
 
     val testClasspath = new TestClasspathBuilder()
       .buildClassPath(
@@ -138,69 +204,28 @@ abstract class BaseYarnClusterSuite
       .asScala
       .mkString(File.pathSeparator)
 
-    props.setProperty("spark.driver.extraClassPath", testClasspath)
-    props.setProperty("spark.executor.extraClassPath", testClasspath)
+    props.put("spark.driver.extraClassPath", testClasspath)
+    props.put("spark.executor.extraClassPath", testClasspath)
 
     // SPARK-4267: make sure java options are propagated correctly.
     props.setProperty("spark.driver.extraJavaOptions", "-Dfoo=\"one two three\"")
     props.setProperty("spark.executor.extraJavaOptions", "-Dfoo=\"one two three\"")
 
-    yarnCluster.getConfig.asScala.foreach { e =>
+    yarnCluster.getConfig().asScala.foreach { e =>
       props.setProperty("spark.hadoop." + e.getKey(), e.getValue())
     }
-
     sys.props.foreach { case (k, v) =>
       if (k.startsWith("spark.")) {
         props.setProperty(k, v)
       }
     }
-
     extraConf.foreach { case (k, v) => props.setProperty(k, v) }
 
     val propsFile = File.createTempFile("spark", ".properties", tempDir)
     val writer = new OutputStreamWriter(new FileOutputStream(propsFile), UTF_8)
     props.store(writer, "Spark properties.")
     writer.close()
-
-    val extraJarArgs = if (extraJars.nonEmpty) Seq("--jars", extraJars.mkString(",")) else Nil
-    val mainArgs =
-      if (klass.endsWith(".py")) {
-        Seq(klass)
-      } else {
-        Seq("--class", klass, fakeSparkJar.getAbsolutePath())
-      }
-    val argv =
-      Seq(
-        new File(sys.props("spark.test.home"), "bin/spark-submit").getAbsolutePath(),
-        "--master", master,
-        "--num-executors", "1",
-        "--properties-file", propsFile.getAbsolutePath()) ++
-      extraJarArgs ++
-      sparkArgs ++
-      mainArgs ++
-      appArgs
-
-    Utils.executeAndGetOutput(argv,
-      extraEnvironment = Map("YARN_CONF_DIR" -> hadoopConfDir.getAbsolutePath()) ++ extraEnv)
-  }
-
-  /**
-   * This is a workaround for an issue with yarn-cluster mode: the Client class will not provide
-   * any sort of error when the job process finishes successfully, but the job itself fails. So
-   * the tests enforce that something is written to a file after everything is ok to indicate
-   * that the job succeeded.
-   */
-  protected def checkResult(result: File): Unit = {
-    checkResult(result, "success")
-  }
-
-  protected def checkResult(result: File, expected: String): Unit = {
-    val resultString = Files.toString(result, UTF_8)
-    resultString should be (expected)
-  }
-
-  protected def mainClassName(klass: Class[_]): String = {
-    klass.getName().stripSuffix("$")
+    propsFile.getAbsolutePath()
   }
 
 }
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
index f1601cd16100..d1cd0c89b5d3 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
@@ -19,16 +19,20 @@ package org.apache.spark.deploy.yarn
 
 import java.io.File
 import java.net.URL
+import java.util.{HashMap => JHashMap, Properties}
 
 import scala.collection.mutable
+import scala.concurrent.duration._
+import scala.language.postfixOps
 
 import com.google.common.base.Charsets.UTF_8
 import com.google.common.io.{ByteStreams, Files}
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 import org.scalatest.Matchers
+import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark._
-import org.apache.spark.launcher.TestClasspathBuilder
+import org.apache.spark.launcher._
 import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationStart,
   SparkListenerExecutorAdded}
 import org.apache.spark.scheduler.cluster.ExecutorInfo
@@ -82,10 +86,8 @@ class YarnClusterSuite extends BaseYarnClusterSuite {
 
   test("run Spark in yarn-cluster mode unsuccessfully") {
     // Don't provide arguments so the driver will fail.
-    val exception = intercept[SparkException] {
-      runSpark(false, mainClassName(YarnClusterDriver.getClass))
-      fail("Spark application should have failed.")
-    }
+    val finalState = runSpark(false, mainClassName(YarnClusterDriver.getClass))
+    finalState should be (SparkAppHandle.State.FAILED)
   }
 
   test("run Python application in yarn-client mode") {
@@ -104,11 +106,42 @@ class YarnClusterSuite extends BaseYarnClusterSuite {
     testUseClassPathFirst(false)
   }
 
+  test("monitor app using launcher library") {
+    val env = new JHashMap[String, String]()
+    env.put("YARN_CONF_DIR", hadoopConfDir.getAbsolutePath())
+
+    val propsFile = createConfFile()
+    val handle = new SparkLauncher(env)
+      .setSparkHome(sys.props("spark.test.home"))
+      .setConf("spark.ui.enabled", "false")
+      .setPropertiesFile(propsFile)
+      .setMaster("yarn-client")
+      .setAppResource("spark-internal")
+      .setMainClass(mainClassName(YarnLauncherTestApp.getClass))
+      .startApplication()
+
+    try {
+      eventually(timeout(30 seconds), interval(100 millis)) {
+        handle.getState() should be (SparkAppHandle.State.RUNNING)
+      }
+
+      handle.getAppId() should not be (null)
+      handle.getAppId() should startWith ("application_")
+      handle.stop()
+
+      eventually(timeout(30 seconds), interval(100 millis)) {
+        handle.getState() should be (SparkAppHandle.State.KILLED)
+      }
+    } finally {
+      handle.kill()
+    }
+  }
+
   private def testBasicYarnApp(clientMode: Boolean): Unit = {
     val result = File.createTempFile("result", null, tempDir)
-    runSpark(clientMode, mainClassName(YarnClusterDriver.getClass),
+    val finalState = runSpark(clientMode, mainClassName(YarnClusterDriver.getClass),
       appArgs = Seq(result.getAbsolutePath()))
-    checkResult(result)
+    checkResult(finalState, result)
   }
 
   private def testPySpark(clientMode: Boolean): Unit = {
@@ -143,11 +176,11 @@ class YarnClusterSuite extends BaseYarnClusterSuite {
     val pyFiles = Seq(pyModule.getAbsolutePath(), mod2Archive.getPath()).mkString(",")
     val result = File.createTempFile("result", null, tempDir)
 
-    runSpark(clientMode, primaryPyFile.getAbsolutePath(),
-      sparkArgs = Seq("--py-files", pyFiles),
+    val finalState = runSpark(clientMode, primaryPyFile.getAbsolutePath(),
+      sparkArgs = Seq("--py-files" -> pyFiles),
       appArgs = Seq(result.getAbsolutePath()),
       extraEnv = extraEnv)
-    checkResult(result)
+    checkResult(finalState, result)
   }
 
   private def testUseClassPathFirst(clientMode: Boolean): Unit = {
@@ -156,15 +189,15 @@ class YarnClusterSuite extends BaseYarnClusterSuite {
     val userJar = TestUtils.createJarWithFiles(Map("test.resource" -> "OVERRIDDEN"), tempDir)
     val driverResult = File.createTempFile("driver", null, tempDir)
     val executorResult = File.createTempFile("executor", null, tempDir)
-    runSpark(clientMode, mainClassName(YarnClasspathTest.getClass),
+    val finalState = runSpark(clientMode, mainClassName(YarnClasspathTest.getClass),
       appArgs = Seq(driverResult.getAbsolutePath(), executorResult.getAbsolutePath()),
       extraClassPath = Seq(originalJar.getPath()),
       extraJars = Seq("local:" + userJar.getPath()),
       extraConf = Map(
         "spark.driver.userClassPathFirst" -> "true",
         "spark.executor.userClassPathFirst" -> "true"))
-    checkResult(driverResult, "OVERRIDDEN")
-    checkResult(executorResult, "OVERRIDDEN")
+    checkResult(finalState, driverResult, "OVERRIDDEN")
+    checkResult(finalState, executorResult, "OVERRIDDEN")
   }
 
 }
@@ -211,8 +244,8 @@ private object YarnClusterDriver extends Logging with Matchers {
       data should be (Set(1, 2, 3, 4))
       result = "success"
     } finally {
-      sc.stop()
       Files.write(result, status, UTF_8)
+      sc.stop()
     }
 
     // verify log urls are present
@@ -297,3 +330,18 @@ private object YarnClasspathTest extends Logging {
   }
 
 }
+
+private object YarnLauncherTestApp {
+
+  def main(args: Array[String]): Unit = {
+    // Do not stop the application; the test will stop it using the launcher lib. Just run a task
+    // that will prevent the process from exiting.
+    val sc = new SparkContext(new SparkConf())
+    sc.parallelize(Seq(1)).foreach { i =>
+      this.synchronized {
+        wait()
+      }
+    }
+  }
+
+}
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
index a85e5772a0fa..c17e8695c24f 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnShuffleIntegrationSuite.scala
@@ -53,7 +53,7 @@ class YarnShuffleIntegrationSuite extends BaseYarnClusterSuite {
 
     logInfo("Shuffle service port = " + shuffleServicePort)
     val result = File.createTempFile("result", null, tempDir)
-    runSpark(
+    val finalState = runSpark(
       false,
       mainClassName(YarnExternalShuffleDriver.getClass),
       appArgs = Seq(result.getAbsolutePath(), registeredExecFile.getAbsolutePath),
@@ -62,7 +62,7 @@ class YarnShuffleIntegrationSuite extends BaseYarnClusterSuite {
         "spark.shuffle.service.port" -> shuffleServicePort.toString
       )
     )
-    checkResult(result)
+    checkResult(finalState, result)
     assert(YarnTestAccessor.getRegisteredExecutorFile(shuffleService).exists())
   }
 }

From 12b7191d2075ae870c73529de450cbb5725872ec Mon Sep 17 00:00:00 2001
From: Rick Hillegas <rhilleg@us.ibm.com>
Date: Fri, 9 Oct 2015 13:36:51 -0700
Subject: [PATCH 200/896] [SPARK-10855] [SQL] Add a JDBC dialect for Apache
 Derby

marmbrus
rxin

This patch adds a JdbcDialect class, which customizes the datatype mappings for Derby backends. The patch also adds unit tests for the new dialect, corresponding to the existing tests for other JDBC dialects.

JDBCSuite runs cleanly for me with this patch. So does JDBCWriteSuite, although it produces noise as described here: https://issues.apache.org/jira/browse/SPARK-10890

This patch is my original work, which I license to the ASF. I am a Derby contributor, so my ICLA is on file under SVN id "rhillegas": http://people.apache.org/committer-index.html

Touches the following files:

---------------------------------

org.apache.spark.sql.jdbc.JdbcDialects

Adds a DerbyDialect.

---------------------------------

org.apache.spark.sql.jdbc.JDBCSuite

Adds unit tests for the new DerbyDialect.

Author: Rick Hillegas <rhilleg@us.ibm.com>

Closes #8982 from rick-ibm/b_10855.
---
 .../apache/spark/sql/jdbc/JdbcDialects.scala  | 28 +++++++++++++++++++
 .../org/apache/spark/sql/jdbc/JDBCSuite.scala | 14 +++++++++-
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index 0cd356f22298..a2ff4cc1c91f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -138,6 +138,7 @@ object JdbcDialects {
   registerDialect(PostgresDialect)
   registerDialect(DB2Dialect)
   registerDialect(MsSqlServerDialect)
+  registerDialect(DerbyDialect)
 
 
   /**
@@ -287,3 +288,30 @@ case object MsSqlServerDialect extends JdbcDialect {
     case _ => None
   }
 }
+
+/**
+ * :: DeveloperApi ::
+ * Default Apache Derby dialect, mapping real on read
+ * and string/byte/short/boolean/decimal on write.
+ */
+@DeveloperApi
+case object DerbyDialect extends JdbcDialect {
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:derby")
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (sqlType == Types.REAL) Option(FloatType) else None
+  }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case StringType => Some(JdbcType("CLOB", java.sql.Types.CLOB))
+    case ByteType => Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
+    case ShortType => Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
+    case BooleanType => Some(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
+    // 31 is the maximum precision and 5 is the default scale for a Derby DECIMAL
+    case (t: DecimalType) if (t.precision > 31) =>
+      Some(JdbcType("DECIMAL(31,5)", java.sql.Types.DECIMAL))
+    case _ => None
+  }
+
+}
+
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
index bbf705ce9593..d530b1a469ce 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala
@@ -409,18 +409,22 @@ class JDBCSuite extends SparkFunSuite with BeforeAndAfter with SharedSQLContext
     assert(JdbcDialects.get("jdbc:postgresql://127.0.0.1/db") == PostgresDialect)
     assert(JdbcDialects.get("jdbc:db2://127.0.0.1/db") == DB2Dialect)
     assert(JdbcDialects.get("jdbc:sqlserver://127.0.0.1/db") == MsSqlServerDialect)
+    assert(JdbcDialects.get("jdbc:derby:db") == DerbyDialect)
     assert(JdbcDialects.get("test.invalid") == NoopDialect)
   }
 
   test("quote column names by jdbc dialect") {
     val MySQL = JdbcDialects.get("jdbc:mysql://127.0.0.1/db")
     val Postgres = JdbcDialects.get("jdbc:postgresql://127.0.0.1/db")
+    val Derby = JdbcDialects.get("jdbc:derby:db")
 
     val columns = Seq("abc", "key")
     val MySQLColumns = columns.map(MySQL.quoteIdentifier(_))
     val PostgresColumns = columns.map(Postgres.quoteIdentifier(_))
+    val DerbyColumns = columns.map(Derby.quoteIdentifier(_))
     assert(MySQLColumns === Seq("`abc`", "`key`"))
     assert(PostgresColumns === Seq(""""abc"""", """"key""""))
+    assert(DerbyColumns === Seq(""""abc"""", """"key""""))
   }
 
   test("Dialect unregister") {
@@ -454,16 +458,23 @@ class JDBCSuite extends SparkFunSuite with BeforeAndAfter with SharedSQLContext
 
   test("PostgresDialect type mapping") {
     val Postgres = JdbcDialects.get("jdbc:postgresql://127.0.0.1/db")
-    // SPARK-7869: Testing JSON types handling
     assert(Postgres.getCatalystType(java.sql.Types.OTHER, "json", 1, null) === Some(StringType))
     assert(Postgres.getCatalystType(java.sql.Types.OTHER, "jsonb", 1, null) === Some(StringType))
   }
 
+  test("DerbyDialect jdbc type mapping") {
+    val derbyDialect = JdbcDialects.get("jdbc:derby:db")
+    assert(derbyDialect.getJDBCType(StringType).map(_.databaseTypeDefinition).get == "CLOB")
+    assert(derbyDialect.getJDBCType(ByteType).map(_.databaseTypeDefinition).get == "SMALLINT")
+    assert(derbyDialect.getJDBCType(BooleanType).map(_.databaseTypeDefinition).get == "BOOLEAN")
+  }
+
   test("table exists query by jdbc dialect") {
     val MySQL = JdbcDialects.get("jdbc:mysql://127.0.0.1/db")
     val Postgres = JdbcDialects.get("jdbc:postgresql://127.0.0.1/db")
     val db2 = JdbcDialects.get("jdbc:db2://127.0.0.1/db")
     val h2 = JdbcDialects.get(url)
+    val derby = JdbcDialects.get("jdbc:derby:db")
     val table = "weblogs"
     val defaultQuery = s"SELECT * FROM $table WHERE 1=0"
     val limitQuery = s"SELECT 1 FROM $table LIMIT 1"
@@ -471,5 +482,6 @@ class JDBCSuite extends SparkFunSuite with BeforeAndAfter with SharedSQLContext
     assert(Postgres.getTableExistsQuery(table) == limitQuery)
     assert(db2.getTableExistsQuery(table) == defaultQuery)
     assert(h2.getTableExistsQuery(table) == defaultQuery)
+    assert(derby.getTableExistsQuery(table) == defaultQuery)
   }
 }

From 63c340a710b24869410d56602b712fbfe443e6f0 Mon Sep 17 00:00:00 2001
From: Tom Graves <tgraves@yahoo-inc.com>
Date: Fri, 9 Oct 2015 14:06:25 -0700
Subject: [PATCH 201/896] [SPARK-10858] YARN: archives/jar/files rename with #
 doesn't work unl

https://issues.apache.org/jira/browse/SPARK-10858

The issue here is that in resolveURI we default to calling new File(path).getAbsoluteFile().toURI().  But if the path passed in already has a # in it then File(path) will think that is supposed to be part of the actual file path and not a fragment so it changes # to %23. Then when we try to parse that  later in Client as a URI it doesn't recognize there is a fragment.

so to fix we just check if there is a fragment, still create the File like we did before and then add the fragment back on.

Author: Tom Graves <tgraves@yahoo-inc.com>

Closes #9035 from tgravescs/SPARK-10858.
---
 core/src/main/scala/org/apache/spark/util/Utils.scala      | 7 +++++++
 core/src/test/scala/org/apache/spark/util/UtilsSuite.scala | 6 +++---
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 2bab4af2e73a..e60c1b355a73 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -1749,6 +1749,13 @@ private[spark] object Utils extends Logging {
       if (uri.getScheme() != null) {
         return uri
       }
+      // make sure to handle if the path has a fragment (applies to yarn
+      // distributed cache)
+      if (uri.getFragment() != null) {
+        val absoluteURI = new File(uri.getPath()).getAbsoluteFile().toURI()
+        return new URI(absoluteURI.getScheme(), absoluteURI.getHost(), absoluteURI.getPath(),
+          uri.getFragment())
+      }
     } catch {
       case e: URISyntaxException =>
     }
diff --git a/core/src/test/scala/org/apache/spark/util/UtilsSuite.scala b/core/src/test/scala/org/apache/spark/util/UtilsSuite.scala
index 1fb81ad565b4..68b0da76bc13 100644
--- a/core/src/test/scala/org/apache/spark/util/UtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/UtilsSuite.scala
@@ -384,7 +384,7 @@ class UtilsSuite extends SparkFunSuite with ResetSystemProperties with Logging {
     assertResolves("hdfs:/root/spark.jar", "hdfs:/root/spark.jar")
     assertResolves("hdfs:///root/spark.jar#app.jar", "hdfs:/root/spark.jar#app.jar")
     assertResolves("spark.jar", s"file:$cwd/spark.jar")
-    assertResolves("spark.jar#app.jar", s"file:$cwd/spark.jar%23app.jar")
+    assertResolves("spark.jar#app.jar", s"file:$cwd/spark.jar#app.jar")
     assertResolves("path to/file.txt", s"file:$cwd/path%20to/file.txt")
     if (Utils.isWindows) {
       assertResolves("C:\\path\\to\\file.txt", "file:/C:/path/to/file.txt")
@@ -414,10 +414,10 @@ class UtilsSuite extends SparkFunSuite with ResetSystemProperties with Logging {
     assertResolves("file:/jar1,file:/jar2", "file:/jar1,file:/jar2")
     assertResolves("hdfs:/jar1,file:/jar2,jar3", s"hdfs:/jar1,file:/jar2,file:$cwd/jar3")
     assertResolves("hdfs:/jar1,file:/jar2,jar3,jar4#jar5,path to/jar6",
-      s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:$cwd/jar4%23jar5,file:$cwd/path%20to/jar6")
+      s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:$cwd/jar4#jar5,file:$cwd/path%20to/jar6")
     if (Utils.isWindows) {
       assertResolves("""hdfs:/jar1,file:/jar2,jar3,C:\pi.py#py.pi,C:\path to\jar4""",
-        s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:/C:/pi.py%23py.pi,file:/C:/path%20to/jar4")
+        s"hdfs:/jar1,file:/jar2,file:$cwd/jar3,file:/C:/pi.py#py.pi,file:/C:/path%20to/jar4")
     }
   }
 

From c1b4ce43264fa8b9945df3c599a51d4d2a675705 Mon Sep 17 00:00:00 2001
From: Vladimir Vladimirov <vladimir.vladimirov@magnetic.com>
Date: Fri, 9 Oct 2015 14:16:13 -0700
Subject: [PATCH 202/896] [SPARK-10535] Sync up API for matrix factorization
 model between Scala and PySpark

Support for recommendUsersForProducts and recommendProductsForUsers in matrix factorization model for PySpark

Author: Vladimir Vladimirov <vladimir.vladimirov@magnetic.com>

Closes #8700 from smartkiwi/SPARK-10535_.
---
 .../MatrixFactorizationModelWrapper.scala     |  8 +++++
 python/pyspark/mllib/recommendation.py        | 32 ++++++++++++++++---
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/MatrixFactorizationModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/MatrixFactorizationModelWrapper.scala
index 534edac56bc5..eeb7cba882ce 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/MatrixFactorizationModelWrapper.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/MatrixFactorizationModelWrapper.scala
@@ -42,4 +42,12 @@ private[python] class MatrixFactorizationModelWrapper(model: MatrixFactorization
       case (product, feature) => (product, Vectors.dense(feature))
     }.asInstanceOf[RDD[(Any, Any)]])
   }
+
+  def wrappedRecommendProductsForUsers(num: Int): RDD[Array[Any]] = {
+    SerDe.fromTuple2RDD(recommendProductsForUsers(num).asInstanceOf[RDD[(Any, Any)]])
+  }
+
+  def wrappedRecommendUsersForProducts(num: Int): RDD[Array[Any]] = {
+    SerDe.fromTuple2RDD(recommendUsersForProducts(num).asInstanceOf[RDD[(Any, Any)]])
+  }
 }
diff --git a/python/pyspark/mllib/recommendation.py b/python/pyspark/mllib/recommendation.py
index 95047b5b7b4b..b9442b0d16c0 100644
--- a/python/pyspark/mllib/recommendation.py
+++ b/python/pyspark/mllib/recommendation.py
@@ -76,16 +76,28 @@ class MatrixFactorizationModel(JavaModelWrapper, JavaSaveable, JavaLoader):
 
     >>> first_user = model.userFeatures().take(1)[0]
     >>> latents = first_user[1]
-    >>> len(latents) == 4
-    True
+    >>> len(latents)
+    4
 
     >>> model.productFeatures().collect()
     [(1, array('d', [...])), (2, array('d', [...]))]
 
     >>> first_product = model.productFeatures().take(1)[0]
     >>> latents = first_product[1]
-    >>> len(latents) == 4
-    True
+    >>> len(latents)
+    4
+
+    >>> products_for_users = model.recommendProductsForUsers(1).collect()
+    >>> len(products_for_users)
+    2
+    >>> products_for_users[0]
+    (1, (Rating(user=1, product=2, rating=...),))
+
+    >>> users_for_products = model.recommendUsersForProducts(1).collect()
+    >>> len(users_for_products)
+    2
+    >>> users_for_products[0]
+    (1, (Rating(user=2, product=1, rating=...),))
 
     >>> model = ALS.train(ratings, 1, nonnegative=True, seed=10)
     >>> model.predict(2, 2)
@@ -166,6 +178,18 @@ def recommendProducts(self, user, num):
         """
         return list(self.call("recommendProducts", user, num))
 
+    def recommendProductsForUsers(self, num):
+        """
+        Recommends top "num" products for all users. The number returned may be less than this.
+        """
+        return self.call("wrappedRecommendProductsForUsers", num)
+
+    def recommendUsersForProducts(self, num):
+        """
+        Recommends top "num" users for all products. The number returned may be less than this.
+        """
+        return self.call("wrappedRecommendUsersForProducts", num)
+
     @property
     @since("1.4.0")
     def rank(self):

From 864de3bf4041c829e95d278b9569e91448bab0cc Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Fri, 9 Oct 2015 23:05:38 -0700
Subject: [PATCH 203/896] [SPARK-10079] [SPARKR] Make 'column' and 'col'
 functions be S4 functions.

1.  Add a "col" function into DataFrame.
2.  Move the current "col" function in Column.R to functions.R, convert it to S4 function.
3.  Add a s4 "column" function in functions.R.
4.  Convert the "column" function in Column.R to S4 function. This is for private use.

Author: Sun Rui <rui.sun@intel.com>

Closes #8864 from sun-rui/SPARK-10079.
---
 R/pkg/NAMESPACE                  |  1 +
 R/pkg/R/column.R                 | 12 +++++-------
 R/pkg/R/functions.R              | 22 ++++++++++++++++++++++
 R/pkg/R/generics.R               |  4 ++++
 R/pkg/inst/tests/test_sparkSQL.R |  4 ++--
 5 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 255be2e76ff4..95d949ee3e5a 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -107,6 +107,7 @@ exportMethods("%in%",
               "cbrt",
               "ceil",
               "ceiling",
+              "column",
               "concat",
               "concat_ws",
               "contains",
diff --git a/R/pkg/R/column.R b/R/pkg/R/column.R
index 42e9d12179db..20de3907b7dd 100644
--- a/R/pkg/R/column.R
+++ b/R/pkg/R/column.R
@@ -36,13 +36,11 @@ setMethod("initialize", "Column", function(.Object, jc) {
   .Object
 })
 
-column <- function(jc) {
-  new("Column", jc)
-}
-
-col <- function(x) {
-  column(callJStatic("org.apache.spark.sql.functions", "col", x))
-}
+setMethod("column",
+          signature(x = "jobj"),
+          function(x) {
+            new("Column", x)
+          })
 
 #' @rdname show
 #' @name show
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index 94687edb0544..a220ad8b9f58 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -233,6 +233,28 @@ setMethod("ceil",
             column(jc)
           })
 
+#' Though scala functions has "col" function, we don't expose it in SparkR
+#' because we don't want to conflict with the "col" function in the R base
+#' package and we also have "column" function exported which is an alias of "col".
+col <- function(x) {
+  column(callJStatic("org.apache.spark.sql.functions", "col", x))
+}
+
+#' column
+#'
+#' Returns a Column based on the given column name.
+#'
+#' @rdname col
+#' @name column
+#' @family normal_funcs
+#' @export
+#' @examples \dontrun{column(df)}
+setMethod("column",
+          signature(x = "character"),
+          function(x) {
+            col(x)
+          })
+
 #' cos
 #'
 #' Computes the cosine of the given value.
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index c4474131804b..8fad17026c06 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -686,6 +686,10 @@ setGeneric("cbrt", function(x) { standardGeneric("cbrt") })
 #' @export
 setGeneric("ceil", function(x) { standardGeneric("ceil") })
 
+#' @rdname col
+#' @export
+setGeneric("column", function(x) { standardGeneric("column") })
+
 #' @rdname concat
 #' @export
 setGeneric("concat", function(x, ...) { standardGeneric("concat") })
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 4804ecf17734..3a04edbb4c11 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -787,7 +787,7 @@ test_that("test HiveContext", {
 })
 
 test_that("column operators", {
-  c <- SparkR:::col("a")
+  c <- column("a")
   c2 <- (- c + 1 - 2) * 3 / 4.0
   c3 <- (c + c2 - c2) * c2 %% c2
   c4 <- (c > c2) & (c2 <= c3) | (c == c2) & (c2 != c3)
@@ -795,7 +795,7 @@ test_that("column operators", {
 })
 
 test_that("column functions", {
-  c <- SparkR:::col("a")
+  c <- column("a")
   c1 <- abs(c) + acos(c) + approxCountDistinct(c) + ascii(c) + asin(c) + atan(c)
   c2 <- avg(c) + base64(c) + bin(c) + bitwiseNOT(c) + cbrt(c) + ceil(c) + cos(c)
   c3 <- cosh(c) + count(c) + crc32(c) + exp(c)

From a16396df76cc27099011bfb96b28cbdd7f964ca8 Mon Sep 17 00:00:00 2001
From: Jacker Hu <gt.hu.chang@gmail.com>
Date: Sat, 10 Oct 2015 11:36:18 +0100
Subject: [PATCH 204/896] [SPARK-10772] [STREAMING] [SCALA]
 NullPointerException when transform function in DStream returns NULL

Currently, the ```TransformedDStream``` will using ```Some(transformFunc(parentRDDs, validTime))``` as compute return value, when the ```transformFunc``` somehow returns null as return value, the followed operator will have NullPointerExeception.

This fix uses the ```Option()``` instead of ```Some()``` to deal with the possible null value. When   ```transformFunc``` returns ```null```, the option will transform null to ```None```, the downstream can handle ```None``` correctly.

NOTE (2015-09-25): The latest fix will check the return value of transform function, if it is ```NULL```, a spark exception will be thrown out

Author: Jacker Hu <gt.hu.chang@gmail.com>
Author: jhu-chang <gt.hu.chang@gmail.com>

Closes #8881 from jhu-chang/Fix_Transform.
---
 .../streaming/dstream/TransformedDStream.scala      | 12 ++++++++++--
 .../spark/streaming/BasicOperationsSuite.scala      | 13 +++++++++++++
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
index 5d46ca0715ff..ab01f47d5cf9 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
@@ -17,9 +17,11 @@
 
 package org.apache.spark.streaming.dstream
 
+import scala.reflect.ClassTag
+
+import org.apache.spark.SparkException
 import org.apache.spark.rdd.{PairRDDFunctions, RDD}
 import org.apache.spark.streaming.{Duration, Time}
-import scala.reflect.ClassTag
 
 private[streaming]
 class TransformedDStream[U: ClassTag] (
@@ -38,6 +40,12 @@ class TransformedDStream[U: ClassTag] (
 
   override def compute(validTime: Time): Option[RDD[U]] = {
     val parentRDDs = parents.map(_.getOrCompute(validTime).orNull).toSeq
-    Some(transformFunc(parentRDDs, validTime))
+    val transformedRDD = transformFunc(parentRDDs, validTime)
+    if (transformedRDD == null) {
+      throw new SparkException("Transform function must not return null. " +
+        "Return SparkContext.emptyRDD() instead to represent no element " +
+        "as the result of transformation.")
+    }
+    Some(transformedRDD)
   }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
index 255376807c95..9988f410f0bc 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
@@ -211,6 +211,19 @@ class BasicOperationsSuite extends TestSuiteBase {
     )
   }
 
+  test("transform with NULL") {
+    val input = Seq(1 to 4)
+    intercept[SparkException] {
+      testOperation(
+        input,
+        (r: DStream[Int]) => r.transform(rdd => null.asInstanceOf[RDD[Int]]),
+        Seq(Seq()),
+        1,
+        false
+      )
+    }
+  }
+
   test("transformWith") {
     val inputData1 = Seq( Seq("a", "b"), Seq("a", ""), Seq(""), Seq() )
     val inputData2 = Seq( Seq("a", "b"), Seq("b", ""), Seq(), Seq("")   )

From 595012ea8b9c6afcc2fc024d5a5e198df765bd75 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sun, 11 Oct 2015 18:11:08 -0700
Subject: [PATCH 205/896] [SPARK-11053] Remove use of KVIterator in
 SortBasedAggregationIterator

SortBasedAggregationIterator uses a KVIterator interface in order to process input rows as key-value pairs, but this use of KVIterator is unnecessary, slightly complicates the code, and might hurt performance. This patch refactors this code to remove the use of this extra layer of iterator wrapping and simplifies other parts of the code in the process.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9066 from JoshRosen/sort-iterator-cleanup.
---
 .../aggregate/AggregationIterator.scala       | 83 -----------------
 .../aggregate/SortBasedAggregate.scala        | 20 +++--
 .../SortBasedAggregationIterator.scala        | 89 +++++--------------
 3 files changed, 33 insertions(+), 159 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index 5f7341e88c7c..8e0fbd109b41 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -21,7 +21,6 @@ import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
-import org.apache.spark.unsafe.KVIterator
 
 import scala.collection.mutable.ArrayBuffer
 
@@ -412,85 +411,3 @@ abstract class AggregationIterator(
    */
   protected def newBuffer: MutableRow
 }
-
-object AggregationIterator {
-  def kvIterator(
-    groupingExpressions: Seq[NamedExpression],
-    newProjection: (Seq[Expression], Seq[Attribute]) => Projection,
-    inputAttributes: Seq[Attribute],
-    inputIter: Iterator[InternalRow]): KVIterator[InternalRow, InternalRow] = {
-    new KVIterator[InternalRow, InternalRow] {
-      private[this] val groupingKeyGenerator = newProjection(groupingExpressions, inputAttributes)
-
-      private[this] var groupingKey: InternalRow = _
-
-      private[this] var value: InternalRow = _
-
-      override def next(): Boolean = {
-        if (inputIter.hasNext) {
-          // Read the next input row.
-          val inputRow = inputIter.next()
-          // Get groupingKey based on groupingExpressions.
-          groupingKey = groupingKeyGenerator(inputRow)
-          // The value is the inputRow.
-          value = inputRow
-          true
-        } else {
-          false
-        }
-      }
-
-      override def getKey(): InternalRow = {
-        groupingKey
-      }
-
-      override def getValue(): InternalRow = {
-        value
-      }
-
-      override def close(): Unit = {
-        // Do nothing
-      }
-    }
-  }
-
-  def unsafeKVIterator(
-      groupingExpressions: Seq[NamedExpression],
-      inputAttributes: Seq[Attribute],
-      inputIter: Iterator[InternalRow]): KVIterator[UnsafeRow, InternalRow] = {
-    new KVIterator[UnsafeRow, InternalRow] {
-      private[this] val groupingKeyGenerator =
-        UnsafeProjection.create(groupingExpressions, inputAttributes)
-
-      private[this] var groupingKey: UnsafeRow = _
-
-      private[this] var value: InternalRow = _
-
-      override def next(): Boolean = {
-        if (inputIter.hasNext) {
-          // Read the next input row.
-          val inputRow = inputIter.next()
-          // Get groupingKey based on groupingExpressions.
-          groupingKey = groupingKeyGenerator.apply(inputRow)
-          // The value is the inputRow.
-          value = inputRow
-          true
-        } else {
-          false
-        }
-      }
-
-      override def getKey(): UnsafeRow = {
-        groupingKey
-      }
-
-      override def getValue(): InternalRow = {
-        value
-      }
-
-      override def close(): Unit = {
-        // Do nothing
-      }
-    }
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
index f4c14a9b3556..4d37106e007f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
@@ -23,9 +23,8 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.physical.{UnspecifiedDistribution, ClusteredDistribution, AllTuples, Distribution}
-import org.apache.spark.sql.execution.{UnsafeFixedWidthAggregationMap, SparkPlan, UnaryNode}
+import org.apache.spark.sql.execution.{SparkPlan, UnaryNode}
 import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.sql.types.StructType
 
 case class SortBasedAggregate(
     requiredChildDistributionExpressions: Option[Seq[Expression]],
@@ -79,18 +78,23 @@ case class SortBasedAggregate(
         // so return an empty iterator.
         Iterator[InternalRow]()
       } else {
-        val outputIter = SortBasedAggregationIterator.createFromInputIterator(
-          groupingExpressions,
+        val groupingKeyProjection = if (UnsafeProjection.canSupport(groupingExpressions)) {
+          UnsafeProjection.create(groupingExpressions, child.output)
+        } else {
+          newMutableProjection(groupingExpressions, child.output)()
+        }
+        val outputIter = new SortBasedAggregationIterator(
+          groupingKeyProjection,
+          groupingExpressions.map(_.toAttribute),
+          child.output,
+          iter,
           nonCompleteAggregateExpressions,
           nonCompleteAggregateAttributes,
           completeAggregateExpressions,
           completeAggregateAttributes,
           initialInputBufferOffset,
           resultExpressions,
-          newMutableProjection _,
-          newProjection _,
-          child.output,
-          iter,
+          newMutableProjection,
           outputsUnsafeRows,
           numInputRows,
           numOutputRows)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
index a9e5d175bf89..64c673064f57 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
@@ -21,16 +21,16 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression2, AggregateFunction2}
 import org.apache.spark.sql.execution.metric.LongSQLMetric
-import org.apache.spark.unsafe.KVIterator
 
 /**
  * An iterator used to evaluate [[AggregateFunction2]]. It assumes the input rows have been
  * sorted by values of [[groupingKeyAttributes]].
  */
 class SortBasedAggregationIterator(
+    groupingKeyProjection: InternalRow => InternalRow,
     groupingKeyAttributes: Seq[Attribute],
     valueAttributes: Seq[Attribute],
-    inputKVIterator: KVIterator[InternalRow, InternalRow],
+    inputIterator: Iterator[InternalRow],
     nonCompleteAggregateExpressions: Seq[AggregateExpression2],
     nonCompleteAggregateAttributes: Seq[Attribute],
     completeAggregateExpressions: Seq[AggregateExpression2],
@@ -90,6 +90,22 @@ class SortBasedAggregationIterator(
   // The aggregation buffer used by the sort-based aggregation.
   private[this] val sortBasedAggregationBuffer: MutableRow = newBuffer
 
+  protected def initialize(): Unit = {
+    if (inputIterator.hasNext) {
+      initializeBuffer(sortBasedAggregationBuffer)
+      val inputRow = inputIterator.next()
+      nextGroupingKey = groupingKeyProjection(inputRow).copy()
+      firstRowInNextGroup = inputRow.copy()
+      numInputRows += 1
+      sortedInputHasNewGroup = true
+    } else {
+      // This inputIter is empty.
+      sortedInputHasNewGroup = false
+    }
+  }
+
+  initialize()
+
   /** Processes rows in the current group. It will stop when it find a new group. */
   protected def processCurrentSortedGroup(): Unit = {
     currentGroupingKey = nextGroupingKey
@@ -101,18 +117,15 @@ class SortBasedAggregationIterator(
 
     // The search will stop when we see the next group or there is no
     // input row left in the iter.
-    var hasNext = inputKVIterator.next()
-    while (!findNextPartition && hasNext) {
+    while (!findNextPartition && inputIterator.hasNext) {
       // Get the grouping key.
-      val groupingKey = inputKVIterator.getKey
-      val currentRow = inputKVIterator.getValue
+      val currentRow = inputIterator.next()
+      val groupingKey = groupingKeyProjection(currentRow)
       numInputRows += 1
 
       // Check if the current row belongs the current input row.
       if (currentGroupingKey == groupingKey) {
         processRow(sortBasedAggregationBuffer, currentRow)
-
-        hasNext = inputKVIterator.next()
       } else {
         // We find a new group.
         findNextPartition = true
@@ -149,68 +162,8 @@ class SortBasedAggregationIterator(
     }
   }
 
-  protected def initialize(): Unit = {
-    if (inputKVIterator.next()) {
-      initializeBuffer(sortBasedAggregationBuffer)
-
-      nextGroupingKey = inputKVIterator.getKey().copy()
-      firstRowInNextGroup = inputKVIterator.getValue().copy()
-      numInputRows += 1
-      sortedInputHasNewGroup = true
-    } else {
-      // This inputIter is empty.
-      sortedInputHasNewGroup = false
-    }
-  }
-
-  initialize()
-
   def outputForEmptyGroupingKeyWithoutInput(): InternalRow = {
     initializeBuffer(sortBasedAggregationBuffer)
     generateOutput(new GenericInternalRow(0), sortBasedAggregationBuffer)
   }
 }
-
-object SortBasedAggregationIterator {
-  // scalastyle:off
-  def createFromInputIterator(
-      groupingExprs: Seq[NamedExpression],
-      nonCompleteAggregateExpressions: Seq[AggregateExpression2],
-      nonCompleteAggregateAttributes: Seq[Attribute],
-      completeAggregateExpressions: Seq[AggregateExpression2],
-      completeAggregateAttributes: Seq[Attribute],
-      initialInputBufferOffset: Int,
-      resultExpressions: Seq[NamedExpression],
-      newMutableProjection: (Seq[Expression], Seq[Attribute]) => (() => MutableProjection),
-      newProjection: (Seq[Expression], Seq[Attribute]) => Projection,
-      inputAttributes: Seq[Attribute],
-      inputIter: Iterator[InternalRow],
-      outputsUnsafeRows: Boolean,
-      numInputRows: LongSQLMetric,
-      numOutputRows: LongSQLMetric): SortBasedAggregationIterator = {
-    val kvIterator = if (UnsafeProjection.canSupport(groupingExprs)) {
-      AggregationIterator.unsafeKVIterator(
-        groupingExprs,
-        inputAttributes,
-        inputIter).asInstanceOf[KVIterator[InternalRow, InternalRow]]
-    } else {
-      AggregationIterator.kvIterator(groupingExprs, newProjection, inputAttributes, inputIter)
-    }
-
-    new SortBasedAggregationIterator(
-      groupingExprs.map(_.toAttribute),
-      inputAttributes,
-      kvIterator,
-      nonCompleteAggregateExpressions,
-      nonCompleteAggregateAttributes,
-      completeAggregateExpressions,
-      completeAggregateAttributes,
-      initialInputBufferOffset,
-      resultExpressions,
-      newMutableProjection,
-      outputsUnsafeRows,
-      numInputRows,
-      numOutputRows)
-  }
-  // scalastyle:on
-}

From fcb37a04177edc2376e39dd0b910f0268f7c72ec Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 12 Oct 2015 09:16:14 -0700
Subject: [PATCH 206/896] [SPARK-10960] [SQL] SQL with windowing function
 should be able to refer column in inner select

JIRA: https://issues.apache.org/jira/browse/SPARK-10960

When accessing a column in inner select from a select with window function, `AnalysisException` will be thrown. For example, an query like this:

     select area, rank() over (partition by area order by tmp.month) + tmp.tmp1 as c1 from (select month, area, product, 1 as tmp1 from windowData) tmp

Currently, the rule `ExtractWindowExpressions` in `Analyzer` only extracts regular expressions from `WindowFunction`, `WindowSpecDefinition` and `AggregateExpression`. We need to also extract other attributes as the one in `Alias` as shown in the above query.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9011 from viirya/fix-window-inner-column.
---
 .../sql/catalyst/analysis/Analyzer.scala      |  4 +++
 .../sql/hive/execution/SQLQuerySuite.scala    | 27 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index bf72d47ce1ea..f5597a08d359 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -831,6 +831,10 @@ class Analyzer(
             val withName = Alias(agg, s"_w${extractedExprBuffer.length}")()
             extractedExprBuffer += withName
             withName.toAttribute
+
+          // Extracts other attributes
+          case attr: Attribute => extractExpr(attr)
+
         }.asInstanceOf[NamedExpression]
       }
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index ccc15eaa63f4..51b63f368878 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -838,6 +838,33 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       ).map(i => Row(i._1, i._2, i._3)))
   }
 
+  test("window function: refer column in inner select block") {
+    val data = Seq(
+      WindowData(1, "a", 5),
+      WindowData(2, "a", 6),
+      WindowData(3, "b", 7),
+      WindowData(4, "b", 8),
+      WindowData(5, "c", 9),
+      WindowData(6, "c", 10)
+    )
+    sparkContext.parallelize(data).toDF().registerTempTable("windowData")
+
+    checkAnswer(
+      sql(
+        """
+          |select area, rank() over (partition by area order by tmp.month) + tmp.tmp1 as c1
+          |from (select month, area, product, 1 as tmp1 from windowData) tmp
+        """.stripMargin),
+      Seq(
+        ("a", 2),
+        ("a", 3),
+        ("b", 2),
+        ("b", 3),
+        ("c", 2),
+        ("c", 3)
+      ).map(i => Row(i._1, i._2)))
+  }
+
   test("window function: partition and order expressions") {
     val data = Seq(
       WindowData(1, "a", 5),

From 64b1d00e1a7c1dc52c08a5e97baf6e7117f1a94f Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Mon, 12 Oct 2015 10:17:19 -0700
Subject: [PATCH 207/896] [SPARK-11007] [SQL] Adds dictionary aware Parquet
 decimal converters

For Parquet decimal columns that are encoded using plain-dictionary encoding, we can make the upper level converter aware of the dictionary, so that we can pre-instantiate all the decimals to avoid duplicated instantiation.

Note that plain-dictionary encoding isn't available for `FIXED_LEN_BYTE_ARRAY` for Parquet writer version `PARQUET_1_0`. So currently only decimals written as `INT32` and `INT64` can benefit from this optimization.

Author: Cheng Lian <lian@databricks.com>

Closes #9040 from liancheng/spark-11007.decimal-converter-dict-support.
---
 .../parquet/CatalystRowConverter.scala        |  83 +++++++++++++++---
 .../src/test/resources/dec-in-i32.parquet     | Bin 0 -> 420 bytes
 .../src/test/resources/dec-in-i64.parquet     | Bin 0 -> 437 bytes
 .../datasources/parquet/ParquetIOSuite.scala  |  19 ++++
 .../ParquetProtobufCompatibilitySuite.scala   |  22 ++---
 .../datasources/parquet/ParquetTest.scala     |   5 ++
 6 files changed, 103 insertions(+), 26 deletions(-)
 create mode 100755 sql/core/src/test/resources/dec-in-i32.parquet
 create mode 100755 sql/core/src/test/resources/dec-in-i64.parquet

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index 247d35363b86..49007e45ecf8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -26,7 +26,7 @@ import scala.collection.mutable.ArrayBuffer
 import org.apache.parquet.column.Dictionary
 import org.apache.parquet.io.api.{Binary, Converter, GroupConverter, PrimitiveConverter}
 import org.apache.parquet.schema.OriginalType.{INT_32, LIST, UTF8}
-import org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName.DOUBLE
+import org.apache.parquet.schema.PrimitiveType.PrimitiveTypeName.{DOUBLE, INT32, INT64, BINARY, FIXED_LEN_BYTE_ARRAY}
 import org.apache.parquet.schema.{GroupType, MessageType, PrimitiveType, Type}
 
 import org.apache.spark.Logging
@@ -222,8 +222,25 @@ private[parquet] class CatalystRowConverter(
             updater.setShort(value.asInstanceOf[ShortType#InternalType])
         }
 
+      // For INT32 backed decimals
+      case t: DecimalType if parquetType.asPrimitiveType().getPrimitiveTypeName == INT32 =>
+        new CatalystIntDictionaryAwareDecimalConverter(t.precision, t.scale, updater)
+
+      // For INT64 backed decimals
+      case t: DecimalType if parquetType.asPrimitiveType().getPrimitiveTypeName == INT64 =>
+        new CatalystLongDictionaryAwareDecimalConverter(t.precision, t.scale, updater)
+
+      // For BINARY and FIXED_LEN_BYTE_ARRAY backed decimals
+      case t: DecimalType
+        if parquetType.asPrimitiveType().getPrimitiveTypeName == FIXED_LEN_BYTE_ARRAY ||
+           parquetType.asPrimitiveType().getPrimitiveTypeName == BINARY =>
+        new CatalystBinaryDictionaryAwareDecimalConverter(t.precision, t.scale, updater)
+
       case t: DecimalType =>
-        new CatalystDecimalConverter(t, updater)
+        throw new RuntimeException(
+          s"Unable to create Parquet converter for decimal type ${t.json} whose Parquet type is " +
+            s"$parquetType.  Parquet DECIMAL type can only be backed by INT32, INT64, " +
+            "FIXED_LEN_BYTE_ARRAY, or BINARY.")
 
       case StringType =>
         new CatalystStringConverter(updater)
@@ -274,9 +291,10 @@ private[parquet] class CatalystRowConverter(
           override def set(value: Any): Unit = updater.set(value.asInstanceOf[InternalRow].copy())
         })
 
-      case _ =>
+      case t =>
         throw new RuntimeException(
-          s"Unable to create Parquet converter for data type ${catalystType.json}")
+          s"Unable to create Parquet converter for data type ${t.json} " +
+            s"whose Parquet type is $parquetType")
     }
   }
 
@@ -314,11 +332,18 @@ private[parquet] class CatalystRowConverter(
   /**
    * Parquet converter for fixed-precision decimals.
    */
-  private final class CatalystDecimalConverter(
-      decimalType: DecimalType,
-      updater: ParentContainerUpdater)
+  private abstract class CatalystDecimalConverter(
+      precision: Int, scale: Int, updater: ParentContainerUpdater)
     extends CatalystPrimitiveConverter(updater) {
 
+    protected var expandedDictionary: Array[Decimal] = _
+
+    override def hasDictionarySupport: Boolean = true
+
+    override def addValueFromDictionary(dictionaryId: Int): Unit = {
+      updater.set(expandedDictionary(dictionaryId))
+    }
+
     // Converts decimals stored as INT32
     override def addInt(value: Int): Unit = {
       addLong(value: Long)
@@ -326,18 +351,19 @@ private[parquet] class CatalystRowConverter(
 
     // Converts decimals stored as INT64
     override def addLong(value: Long): Unit = {
-      updater.set(Decimal(value, decimalType.precision, decimalType.scale))
+      updater.set(decimalFromLong(value))
     }
 
     // Converts decimals stored as either FIXED_LENGTH_BYTE_ARRAY or BINARY
     override def addBinary(value: Binary): Unit = {
-      updater.set(toDecimal(value))
+      updater.set(decimalFromBinary(value))
     }
 
-    private def toDecimal(value: Binary): Decimal = {
-      val precision = decimalType.precision
-      val scale = decimalType.scale
+    protected def decimalFromLong(value: Long): Decimal = {
+      Decimal(value, precision, scale)
+    }
 
+    protected def decimalFromBinary(value: Binary): Decimal = {
       if (precision <= CatalystSchemaConverter.MAX_PRECISION_FOR_INT64) {
         // Constructs a `Decimal` with an unscaled `Long` value if possible.
         val unscaled = binaryToUnscaledLong(value)
@@ -371,6 +397,39 @@ private[parquet] class CatalystRowConverter(
     }
   }
 
+  private class CatalystIntDictionaryAwareDecimalConverter(
+      precision: Int, scale: Int, updater: ParentContainerUpdater)
+    extends CatalystDecimalConverter(precision, scale, updater) {
+
+    override def setDictionary(dictionary: Dictionary): Unit = {
+      this.expandedDictionary = Array.tabulate(dictionary.getMaxId + 1) { id =>
+        decimalFromLong(dictionary.decodeToInt(id).toLong)
+      }
+    }
+  }
+
+  private class CatalystLongDictionaryAwareDecimalConverter(
+      precision: Int, scale: Int, updater: ParentContainerUpdater)
+    extends CatalystDecimalConverter(precision, scale, updater) {
+
+    override def setDictionary(dictionary: Dictionary): Unit = {
+      this.expandedDictionary = Array.tabulate(dictionary.getMaxId + 1) { id =>
+        decimalFromLong(dictionary.decodeToLong(id))
+      }
+    }
+  }
+
+  private class CatalystBinaryDictionaryAwareDecimalConverter(
+      precision: Int, scale: Int, updater: ParentContainerUpdater)
+    extends CatalystDecimalConverter(precision, scale, updater) {
+
+    override def setDictionary(dictionary: Dictionary): Unit = {
+      this.expandedDictionary = Array.tabulate(dictionary.getMaxId + 1) { id =>
+        decimalFromBinary(dictionary.decodeToBinary(id))
+      }
+    }
+  }
+
   /**
    * Parquet converter for arrays.  Spark SQL arrays are represented as Parquet lists.  Standard
    * Parquet lists are represented as a 3-level group annotated by `LIST`:
diff --git a/sql/core/src/test/resources/dec-in-i32.parquet b/sql/core/src/test/resources/dec-in-i32.parquet
new file mode 100755
index 0000000000000000000000000000000000000000..bb5d4af8dd36817bfb2cc16746417f0f2cbec759
GIT binary patch
literal 420
zcmWG=3^EjD5e*Pc^AQyhWno~D@8)2DfaHXP1P{hX!VYT=pEzK^*s-6XkVTmJu$)3z
zLRvxwV-mx>L&=vkfNDh<L={9`bbthlD4QsUj08&yGXsMJ&@cuDF%W@dW>P{zKtf8Q
zr~#MeY(^CZr+?eF2>?}yGD+%q@Dvv$7G=j5CugMQCW<lv1yz|O*fWid;!{$SRk?ts
zb1{f1NXkgcsBy>ub(penut~xdh_Z+&h@D{+YhzO5u)%NwNJfD{Qbs~EzbIWVu^<s>
zi5}QKz2d?gJ)p&frKu%)Mfv4=xv3?IDTyVC63Nv{C6xuKN>)n6B}JvlB}zI<X_=`x
zDaA@w(bY<MiMb#tsPlkwP_;m}X67d5Xqf64X#z#_N^^1&lX8Gcfo7!YD8WouvZ}7F
ljjd&nkbv5)n_Hw%mReMtnV+X%sAr~Uz#z)Vzz_h89{|hbXDk2!

literal 0
HcmV?d00001

diff --git a/sql/core/src/test/resources/dec-in-i64.parquet b/sql/core/src/test/resources/dec-in-i64.parquet
new file mode 100755
index 0000000000000000000000000000000000000000..e07c4a0ad9843dca983e17d784566aae7b4be54e
GIT binary patch
literal 437
zcmWG=3^EjD5naG2n&KlWBFe(RAm7cw00GGf4Gkh1wM<^G4V+$Z2K?fl(wES5p?bj<
zCgYa8#!C!QD$gec0F{a|h$@J>=l}^8Q8rNy83~RSW{3$AFryg6KmtfcCnY2VB%~yY
z8gOaOW>jHt`nPSH0LUmNNgWTK;)2AY?D*p3jMUsjQ6>ga7F8w*_DnOA_>|OSRW6_{
zA`D^*k}{GqY8*16ERv=y9Bh(s1)?ls3S#S+#HKN+aoFH=3P^<lgQSdvW`0q+USdHa
z&@w%+y?VukIeI_`6qcrz=oRIc>*c1FB&H;mBub=IE0t6hq$*h{6_*s1CYLDbD5Yhl
z=A;xWSw&YX<t65Vq@d0O%0blv-JF@5n4@86pkt&76wWKn$w^Gg0jdQWlB%NwGhWH6
ny0$j9mO(-SYPoK1kwRH&QE_H|o`RvCnVtcI93ulm05HM;Rw!wM

literal 0
HcmV?d00001

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 599cf948e76a..72744799897b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -488,6 +488,25 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       clonedConf.asScala.foreach(entry => hadoopConfiguration.set(entry.getKey, entry.getValue))
     }
   }
+
+  test("read dictionary encoded decimals written as INT32") {
+    checkAnswer(
+      // Decimal column in this file is encoded using plain dictionary
+      readResourceParquetFile("dec-in-i32.parquet"),
+      sqlContext.range(1 << 4).select('id % 10 cast DecimalType(5, 2) as 'i32_dec))
+  }
+
+  test("read dictionary encoded decimals written as INT64") {
+    checkAnswer(
+      // Decimal column in this file is encoded using plain dictionary
+      readResourceParquetFile("dec-in-i64.parquet"),
+      sqlContext.range(1 << 4).select('id % 10 cast DecimalType(10, 2) as 'i64_dec))
+  }
+
+  // TODO Adds test case for reading dictionary encoded decimals written as `FIXED_LEN_BYTE_ARRAY`
+  // The Parquet writer version Spark 1.6 and prior versions use is `PARQUET_1_0`, which doesn't
+  // provide dictionary encoding support for `FIXED_LEN_BYTE_ARRAY`.  Should add a test here once
+  // we upgrade to `PARQUET_2_0`.
 }
 
 class JobCommitFailureParquetOutputCommitter(outputPath: Path, context: TaskAttemptContext)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetProtobufCompatibilitySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetProtobufCompatibilitySuite.scala
index b290429c2a02..98333e58cada 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetProtobufCompatibilitySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetProtobufCompatibilitySuite.scala
@@ -17,23 +17,17 @@
 
 package org.apache.spark.sql.execution.datasources.parquet
 
-import org.apache.spark.sql.{DataFrame, Row}
+import org.apache.spark.sql.Row
 import org.apache.spark.sql.test.SharedSQLContext
 
 class ParquetProtobufCompatibilitySuite extends ParquetCompatibilityTest with SharedSQLContext {
-
-  private def readParquetProtobufFile(name: String): DataFrame = {
-    val url = Thread.currentThread().getContextClassLoader.getResource(name)
-    sqlContext.read.parquet(url.toString)
-  }
-
   test("unannotated array of primitive type") {
-    checkAnswer(readParquetProtobufFile("old-repeated-int.parquet"), Row(Seq(1, 2, 3)))
+    checkAnswer(readResourceParquetFile("old-repeated-int.parquet"), Row(Seq(1, 2, 3)))
   }
 
   test("unannotated array of struct") {
     checkAnswer(
-      readParquetProtobufFile("old-repeated-message.parquet"),
+      readResourceParquetFile("old-repeated-message.parquet"),
       Row(
         Seq(
           Row("First inner", null, null),
@@ -41,14 +35,14 @@ class ParquetProtobufCompatibilitySuite extends ParquetCompatibilityTest with Sh
           Row(null, null, "Third inner"))))
 
     checkAnswer(
-      readParquetProtobufFile("proto-repeated-struct.parquet"),
+      readResourceParquetFile("proto-repeated-struct.parquet"),
       Row(
         Seq(
           Row("0 - 1", "0 - 2", "0 - 3"),
           Row("1 - 1", "1 - 2", "1 - 3"))))
 
     checkAnswer(
-      readParquetProtobufFile("proto-struct-with-array-many.parquet"),
+      readResourceParquetFile("proto-struct-with-array-many.parquet"),
       Seq(
         Row(
           Seq(
@@ -66,13 +60,13 @@ class ParquetProtobufCompatibilitySuite extends ParquetCompatibilityTest with Sh
 
   test("struct with unannotated array") {
     checkAnswer(
-      readParquetProtobufFile("proto-struct-with-array.parquet"),
+      readResourceParquetFile("proto-struct-with-array.parquet"),
       Row(10, 9, Seq.empty, null, Row(9), Seq(Row(9), Row(10))))
   }
 
   test("unannotated array of struct with unannotated array") {
     checkAnswer(
-      readParquetProtobufFile("nested-array-struct.parquet"),
+      readResourceParquetFile("nested-array-struct.parquet"),
       Seq(
         Row(2, Seq(Row(1, Seq(Row(3))))),
         Row(5, Seq(Row(4, Seq(Row(6))))),
@@ -81,7 +75,7 @@ class ParquetProtobufCompatibilitySuite extends ParquetCompatibilityTest with Sh
 
   test("unannotated array of string") {
     checkAnswer(
-      readParquetProtobufFile("proto-repeated-string.parquet"),
+      readResourceParquetFile("proto-repeated-string.parquet"),
       Seq(
         Row(Seq("hello", "world")),
         Row(Seq("good", "bye")),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
index 9840ad919e51..8ffb01fc5b58 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
@@ -139,4 +139,9 @@ private[sql] trait ParquetTest extends SQLTestUtils {
       withSQLConf(SQLConf.PARQUET_WRITE_LEGACY_FORMAT.key -> "true") { f }
     }
   }
+
+  protected def readResourceParquetFile(name: String): DataFrame = {
+    val url = Thread.currentThread().getContextClassLoader.getResource(name)
+    sqlContext.read.parquet(url.toString)
+  }
 }

From 149472a01d12828c64b0a852982d48c123984182 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 12 Oct 2015 10:21:57 -0700
Subject: [PATCH 208/896] [SPARK-11023] [YARN] Avoid creating URIs from local
 paths directly.

The issue is that local paths on Windows, when provided with drive
letters or backslashes, are not valid URIs.

Instead of trying to figure out whether paths are URIs or not, use
Utils.resolveURI() which does that for us.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9049 from vanzin/SPARK-11023 and squashes the following commits:

77021f2 [Marcelo Vanzin] [SPARK-11023] [yarn] Avoid creating URIs from local paths directly.
---
 .../scala/org/apache/spark/deploy/yarn/Client.scala   | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index cec81b940644..1fbd18aa466d 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -358,7 +358,8 @@ private[spark] class Client(
         destName: Option[String] = None,
         targetDir: Option[String] = None,
         appMasterOnly: Boolean = false): (Boolean, String) = {
-      val localURI = new URI(path.trim())
+      val trimmedPath = path.trim()
+      val localURI = Utils.resolveURI(trimmedPath)
       if (localURI.getScheme != LOCAL_SCHEME) {
         if (addDistributedUri(localURI)) {
           val localPath = getQualifiedLocalPath(localURI, hadoopConf)
@@ -374,7 +375,7 @@ private[spark] class Client(
           (false, null)
         }
       } else {
-        (true, path.trim())
+        (true, trimmedPath)
       }
     }
 
@@ -595,10 +596,10 @@ private[spark] class Client(
         LOCALIZED_PYTHON_DIR)
     }
     (pySparkArchives ++ pyArchives).foreach { path =>
-      val uri = new URI(path)
+      val uri = Utils.resolveURI(path)
       if (uri.getScheme != LOCAL_SCHEME) {
         pythonPath += buildPath(YarnSparkHadoopUtil.expandEnvironment(Environment.PWD),
-          new Path(path).getName())
+          new Path(uri).getName())
       } else {
         pythonPath += uri.getPath()
       }
@@ -1229,7 +1230,7 @@ object Client extends Logging {
 
   private def getMainJarUri(mainJar: Option[String]): Option[URI] = {
     mainJar.flatMap { path =>
-      val uri = new URI(path)
+      val uri = Utils.resolveURI(path)
       if (uri.getScheme == LOCAL_SCHEME) Some(uri) else None
     }.orElse(Some(new URI(APP_JAR)))
   }

From 2e572c4135c3f5ad3061c1f58cdb8a70bed0a9d3 Mon Sep 17 00:00:00 2001
From: Ashwin Shankar <ashankar@netflix.com>
Date: Mon, 12 Oct 2015 11:06:21 -0700
Subject: [PATCH 209/896] [SPARK-8170] [PYTHON] Add signal handler to trap
 Ctrl-C in pyspark and cancel all running jobs

This patch adds a signal handler to trap Ctrl-C and cancels running job.

Author: Ashwin Shankar <ashankar@netflix.com>

Closes #9033 from ashwinshankar77/master.
---
 python/pyspark/context.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/python/pyspark/context.py b/python/pyspark/context.py
index a0a1ccbeefb0..4969d85f52b2 100644
--- a/python/pyspark/context.py
+++ b/python/pyspark/context.py
@@ -19,6 +19,7 @@
 
 import os
 import shutil
+import signal
 import sys
 from threading import Lock
 from tempfile import NamedTemporaryFile
@@ -217,6 +218,12 @@ def _do_init(self, master, appName, sparkHome, pyFiles, environment, batchSize,
         else:
             self.profiler_collector = None
 
+        # create a signal handler which would be invoked on receiving SIGINT
+        def signal_handler(signal, frame):
+            self.cancelAllJobs()
+
+        signal.signal(signal.SIGINT, signal_handler)
+
     def _initialize_context(self, jconf):
         """
         Initialize SparkContext in function to allow subclass specific initialization

From 8a354bef55ce9cc0fa77fa1c3a9d62c16438ca1b Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Mon, 12 Oct 2015 13:50:34 -0700
Subject: [PATCH 210/896] [SPARK-11042] [SQL] Add a mechanism to ban creating
 multiple root SQLContexts/HiveContexts in a JVM

https://issues.apache.org/jira/browse/SPARK-11042

Author: Yin Huai <yhuai@databricks.com>

Closes #9058 from yhuai/SPARK-11042.
---
 .../scala/org/apache/spark/sql/SQLConf.scala  | 10 ++
 .../org/apache/spark/sql/SQLContext.scala     | 42 +++++++-
 .../spark/sql/MultiSQLContextsSuite.scala     | 99 +++++++++++++++++++
 .../apache/spark/sql/hive/HiveContext.scala   | 12 ++-
 4 files changed, 156 insertions(+), 7 deletions(-)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 47397c4be3cb..f62df9bdebcc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -186,6 +186,16 @@ private[spark] object SQLConf {
 
   import SQLConfEntry._
 
+  val ALLOW_MULTIPLE_CONTEXTS = booleanConf("spark.sql.allowMultipleContexts",
+    defaultValue = Some(true),
+    doc = "When set to true, creating multiple SQLContexts/HiveContexts is allowed." +
+      "When set to false, only one SQLContext/HiveContext is allowed to be created " +
+      "through the constructor (new SQLContexts/HiveContexts created through newSession " +
+      "method is allowed). Please note that this conf needs to be set in Spark Conf. Once" +
+      "a SQLContext/HiveContext has been created, changing the value of this conf will not" +
+      "have effect.",
+    isPublic = true)
+
   val COMPRESS_CACHED = booleanConf("spark.sql.inMemoryColumnarStorage.compressed",
     defaultValue = Some(true),
     doc = "When set to true Spark SQL will automatically select a compression codec for each " +
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 2bdfd82af0ad..1bd291389241 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -26,7 +26,7 @@ import scala.collection.immutable
 import scala.reflect.runtime.universe.TypeTag
 import scala.util.control.NonFatal
 
-import org.apache.spark.SparkContext
+import org.apache.spark.{SparkException, SparkContext}
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.api.java.{JavaRDD, JavaSparkContext}
 import org.apache.spark.rdd.RDD
@@ -64,14 +64,37 @@ import org.apache.spark.util.Utils
  */
 class SQLContext private[sql](
     @transient val sparkContext: SparkContext,
-    @transient protected[sql] val cacheManager: CacheManager)
+    @transient protected[sql] val cacheManager: CacheManager,
+    val isRootContext: Boolean)
   extends org.apache.spark.Logging with Serializable {
 
   self =>
 
-  def this(sparkContext: SparkContext) = this(sparkContext, new CacheManager)
+  def this(sparkContext: SparkContext) = this(sparkContext, new CacheManager, true)
   def this(sparkContext: JavaSparkContext) = this(sparkContext.sc)
 
+  // If spark.sql.allowMultipleContexts is true, we will throw an exception if a user
+  // wants to create a new root SQLContext (a SLQContext that is not created by newSession).
+  private val allowMultipleContexts =
+    sparkContext.conf.getBoolean(
+      SQLConf.ALLOW_MULTIPLE_CONTEXTS.key,
+      SQLConf.ALLOW_MULTIPLE_CONTEXTS.defaultValue.get)
+
+  // Assert no root SQLContext is running when allowMultipleContexts is false.
+  {
+    if (!allowMultipleContexts && isRootContext) {
+      SQLContext.getInstantiatedContextOption() match {
+        case Some(rootSQLContext) =>
+          val errMsg = "Only one SQLContext/HiveContext may be running in this JVM. " +
+            s"It is recommended to use SQLContext.getOrCreate to get the instantiated " +
+            s"SQLContext/HiveContext. To ignore this error, " +
+            s"set ${SQLConf.ALLOW_MULTIPLE_CONTEXTS.key} = true in SparkConf."
+          throw new SparkException(errMsg)
+        case None => // OK
+      }
+    }
+  }
+
   /**
    * Returns a SQLContext as new session, with separated SQL configurations, temporary tables,
    * registered functions, but sharing the same SparkContext and CacheManager.
@@ -79,7 +102,10 @@ class SQLContext private[sql](
    * @since 1.6.0
    */
   def newSession(): SQLContext = {
-    new SQLContext(sparkContext, cacheManager)
+    new SQLContext(
+      sparkContext = sparkContext,
+      cacheManager = cacheManager,
+      isRootContext = false)
   }
 
   /**
@@ -1239,6 +1265,10 @@ object SQLContext {
     instantiatedContext.compareAndSet(null, sqlContext)
   }
 
+  private[sql] def getInstantiatedContextOption(): Option[SQLContext] = {
+    Option(instantiatedContext.get())
+  }
+
   /**
    * Changes the SQLContext that will be returned in this thread and its children when
    * SQLContext.getOrCreate() is called. This can be used to ensure that a given thread receives
@@ -1260,6 +1290,10 @@ object SQLContext {
     activeContext.remove()
   }
 
+  private[sql] def getActiveContextOption(): Option[SQLContext] = {
+    Option(activeContext.get())
+  }
+
   /**
    * Converts an iterator of Java Beans to InternalRow using the provided
    * bean info & schema. This is not related to the singleton, but is a static
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala
new file mode 100644
index 000000000000..0e8fcb6a858b
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala
@@ -0,0 +1,99 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql
+
+import org.apache.spark._
+import org.scalatest.BeforeAndAfterAll
+
+class MultiSQLContextsSuite extends SparkFunSuite with BeforeAndAfterAll {
+
+  private var originalActiveSQLContext: Option[SQLContext] = _
+  private var originalInstantiatedSQLContext: Option[SQLContext] = _
+  private var sparkConf: SparkConf = _
+
+  override protected def beforeAll(): Unit = {
+    originalActiveSQLContext = SQLContext.getActiveContextOption()
+    originalInstantiatedSQLContext = SQLContext.getInstantiatedContextOption()
+
+    SQLContext.clearActive()
+    originalInstantiatedSQLContext.foreach(ctx => SQLContext.clearInstantiatedContext(ctx))
+    sparkConf =
+      new SparkConf(false)
+        .setMaster("local[*]")
+        .setAppName("test")
+        .set("spark.ui.enabled", "false")
+        .set("spark.driver.allowMultipleContexts", "true")
+  }
+
+  override protected def afterAll(): Unit = {
+    // Set these states back.
+    originalActiveSQLContext.foreach(ctx => SQLContext.setActive(ctx))
+    originalInstantiatedSQLContext.foreach(ctx => SQLContext.setInstantiatedContext(ctx))
+  }
+
+  def testNewSession(rootSQLContext: SQLContext): Unit = {
+    // Make sure we can successfully create new Session.
+    rootSQLContext.newSession()
+
+    // Reset the state. It is always safe to clear the active context.
+    SQLContext.clearActive()
+  }
+
+  def testCreatingNewSQLContext(allowsMultipleContexts: Boolean): Unit = {
+    val conf =
+      sparkConf
+        .clone
+        .set(SQLConf.ALLOW_MULTIPLE_CONTEXTS.key, allowsMultipleContexts.toString)
+    val sparkContext = new SparkContext(conf)
+
+    try {
+      if (allowsMultipleContexts) {
+        new SQLContext(sparkContext)
+        SQLContext.clearActive()
+      } else {
+        // If allowsMultipleContexts is false, make sure we can get the error.
+        val message = intercept[SparkException] {
+          new SQLContext(sparkContext)
+        }.getMessage
+        assert(message.contains("Only one SQLContext/HiveContext may be running"))
+      }
+    } finally {
+      sparkContext.stop()
+    }
+  }
+
+  test("test the flag to disallow creating multiple root SQLContext") {
+    Seq(false, true).foreach { allowMultipleSQLContexts =>
+      val conf =
+        sparkConf
+          .clone
+          .set(SQLConf.ALLOW_MULTIPLE_CONTEXTS.key, allowMultipleSQLContexts.toString)
+      val sc = new SparkContext(conf)
+      try {
+        val rootSQLContext = new SQLContext(sc)
+        testNewSession(rootSQLContext)
+        testNewSession(rootSQLContext)
+        testCreatingNewSQLContext(allowMultipleSQLContexts)
+
+        SQLContext.clearInstantiatedContext(rootSQLContext)
+      } finally {
+        sc.stop()
+      }
+    }
+  }
+}
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index dad1e2347c38..ddeadd3eb737 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -89,10 +89,11 @@ class HiveContext private[hive](
     sc: SparkContext,
     cacheManager: CacheManager,
     @transient execHive: ClientWrapper,
-    @transient metaHive: ClientInterface) extends SQLContext(sc, cacheManager) with Logging {
+    @transient metaHive: ClientInterface,
+    isRootContext: Boolean) extends SQLContext(sc, cacheManager, isRootContext) with Logging {
   self =>
 
-  def this(sc: SparkContext) = this(sc, new CacheManager, null, null)
+  def this(sc: SparkContext) = this(sc, new CacheManager, null, null, true)
   def this(sc: JavaSparkContext) = this(sc.sc)
 
   import org.apache.spark.sql.hive.HiveContext._
@@ -105,7 +106,12 @@ class HiveContext private[hive](
    * and Hive client (both of execution and metadata) with existing HiveContext.
    */
   override def newSession(): HiveContext = {
-    new HiveContext(sc, cacheManager, executionHive.newSession(), metadataHive.newSession())
+    new HiveContext(
+      sc = sc,
+      cacheManager = cacheManager,
+      execHive = executionHive.newSession(),
+      metaHive = metadataHive.newSession(),
+      isRootContext = false)
   }
 
   /**

From 091c2c3ecd69803d78c2b15a1487046701059d38 Mon Sep 17 00:00:00 2001
From: Kay Ousterhout <kayousterhout@gmail.com>
Date: Mon, 12 Oct 2015 14:23:29 -0700
Subject: [PATCH 211/896] [SPARK-11056] Improve documentation of SBT build.

This commit improves the documentation around building Spark to
(1) recommend using SBT interactive mode to avoid the overhead of
launching SBT and (2) refer to the wiki page that documents using
SPARK_PREPEND_CLASSES to avoid creating the assembly jar for each
compile.

cc srowen

Author: Kay Ousterhout <kayousterhout@gmail.com>

Closes #9068 from kayousterhout/SPARK-11056.
---
 docs/building-spark.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/building-spark.md b/docs/building-spark.md
index 4d929ee10a33..743643cbcc62 100644
--- a/docs/building-spark.md
+++ b/docs/building-spark.md
@@ -216,6 +216,11 @@ can be set to control the SBT build. For example:
 
     build/sbt -Pyarn -Phadoop-2.3 assembly
 
+To avoid the overhead of launching sbt each time you need to re-compile, you can launch sbt
+in interactive mode by running `build/sbt`, and then run all build commands at the command
+prompt. For more recommendations on reducing build time, refer to the
+[wiki page](https://cwiki.apache.org/confluence/display/SPARK/Useful+Developer+Tools#UsefulDeveloperTools-ReducingBuildTimes).
+
 # Testing with SBT
 
 Some of the tests require Spark to be packaged first, so always run `build/sbt assembly` the first time.  The following is an example of a correct (build, test) sequence:

From f97e9323b526b3d0b0fee0ca03f4276f37bb5750 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 12 Oct 2015 18:17:28 -0700
Subject: [PATCH 212/896] [SPARK-10739] [YARN] Add application attempt window
 for Spark on Yarn

Add application attempt window for Spark on Yarn to ignore old out of window failures, this is useful for long running applications to recover from failures.

Author: jerryshao <sshao@hortonworks.com>

Closes #8857 from jerryshao/SPARK-10739 and squashes the following commits:

36eabdc [jerryshao] change the doc
7f9b77d [jerryshao] Style change
1c9afd0 [jerryshao] Address the comments
caca695 [jerryshao] Add application attempt window for Spark on Yarn
---
 docs/running-on-yarn.md                            |  9 +++++++++
 .../org/apache/spark/deploy/yarn/Client.scala      | 14 ++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index 6d77db6a3271..677c0000440a 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -305,6 +305,15 @@ If you need a reference to the proper location to put log files in the YARN so t
   It should be no larger than the global number of max attempts in the YARN configuration.
   </td>
 </tr>
+<tr>
+  <td><code>spark.yarn.am.attemptFailuresValidityInterval</code></td>
+  <td>(none)</td>
+  <td>
+  Defines the validity interval for AM failure tracking.
+  If the AM has been running for at least the defined interval, the AM failure count will be reset.
+  This feature is not enabled if not configured, and only supported in Hadoop 2.6+.
+  </td>
+</tr>
 <tr>
   <td><code>spark.yarn.submit.waitAppCompletion</code></td>
   <td><code>true</code></td>
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 1fbd18aa466d..d25d830fd434 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -208,6 +208,20 @@ private[spark] class Client(
       case None => logDebug("spark.yarn.maxAppAttempts is not set. " +
           "Cluster's default value will be used.")
     }
+
+    if (sparkConf.contains("spark.yarn.am.attemptFailuresValidityInterval")) {
+      try {
+        val interval = sparkConf.getTimeAsMs("spark.yarn.am.attemptFailuresValidityInterval")
+        val method = appContext.getClass().getMethod(
+          "setAttemptFailuresValidityInterval", classOf[Long])
+        method.invoke(appContext, interval: java.lang.Long)
+      } catch {
+        case e: NoSuchMethodException =>
+          logWarning("Ignoring spark.yarn.am.attemptFailuresValidityInterval because the version " +
+            "of YARN does not support it")
+      }
+    }
+
     val capability = Records.newRecord(classOf[Resource])
     capability.setMemory(args.amMemory + amMemoryOverhead)
     capability.setVirtualCores(args.amCores)

From c4da5345a0ef643a7518756caaa18ff3f3ea9acc Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 12 Oct 2015 21:12:59 -0700
Subject: [PATCH 213/896] [SPARK-10990] [SPARK-11018] [SQL] improve unrolling
 of complex types

This PR improve the unrolling and read of complex types in columnar cache:
1) Using UnsafeProjection to do serialization of complex types, so they will not be serialized three times (two for actualSize)
2) Copy the bytes from UnsafeRow/UnsafeArrayData to ByteBuffer directly, avoiding the immediate byte[]
3) Using the underlying array in ByteBuffer to create UTF8String/UnsafeRow/UnsafeArrayData without copy.

Combine these optimizations,  we can reduce the unrolling time from 25s to 21s (20% less), reduce the scanning time from 3.5s to 2.5s (28% less).

```
df = sqlContext.read.parquet(path)
t = time.time()
df.cache()
df.count()
print 'unrolling', time.time() - t

for i in range(10):
    t = time.time()
    print df.select("*")._jdf.queryExecution().toRdd().count()
    print time.time() - t
```

The schema is
```
root
 |-- a: struct (nullable = true)
 |    |-- b: long (nullable = true)
 |    |-- c: string (nullable = true)
 |-- d: array (nullable = true)
 |    |-- element: long (containsNull = true)
 |-- e: map (nullable = true)
 |    |-- key: long
 |    |-- value: string (valueContainsNull = true)
```

Now the columnar cache depends on that UnsafeProjection support all the data types (including UDT), this PR also fix that.

Author: Davies Liu <davies@databricks.com>

Closes #9016 from davies/complex2.
---
 .../catalyst/expressions/UnsafeArrayData.java |  12 ++
 .../sql/catalyst/expressions/UnsafeRow.java   |  12 ++
 .../expressions/codegen/CodeGenerator.scala   |   5 +
 .../codegen/GenerateSafeProjection.scala      |   1 +
 .../codegen/GenerateUnsafeProjection.scala    |  29 ++-
 .../spark/sql/columnar/ColumnAccessor.scala   |   9 +-
 .../spark/sql/columnar/ColumnType.scala       | 187 +++++++++---------
 .../columnar/InMemoryColumnarTableScan.scala  |   6 +-
 .../spark/sql/columnar/ColumnTypeSuite.scala  |  37 ++--
 .../NullableColumnAccessorSuite.scala         |   7 +-
 .../columnar/NullableColumnBuilderSuite.scala |  13 +-
 .../apache/spark/unsafe/types/UTF8String.java |  10 +
 12 files changed, 188 insertions(+), 140 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index fdd9125613a2..796f8abec9a1 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -19,6 +19,7 @@
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.nio.ByteBuffer;
 
 import org.apache.spark.sql.types.*;
 import org.apache.spark.unsafe.Platform;
@@ -145,6 +146,8 @@ public Object get(int ordinal, DataType dataType) {
       return getArray(ordinal);
     } else if (dataType instanceof MapType) {
       return getMap(ordinal);
+    } else if (dataType instanceof UserDefinedType) {
+      return get(ordinal, ((UserDefinedType)dataType).sqlType());
     } else {
       throw new UnsupportedOperationException("Unsupported data type " + dataType.simpleString());
     }
@@ -306,6 +309,15 @@ public void writeToMemory(Object target, long targetOffset) {
     Platform.copyMemory(baseObject, baseOffset, target, targetOffset, sizeInBytes);
   }
 
+  public void writeTo(ByteBuffer buffer) {
+    assert(buffer.hasArray());
+    byte[] target = buffer.array();
+    int offset = buffer.arrayOffset();
+    int pos = buffer.position();
+    writeToMemory(target, Platform.BYTE_ARRAY_OFFSET + offset + pos);
+    buffer.position(pos + sizeInBytes);
+  }
+
   @Override
   public UnsafeArrayData copy() {
     UnsafeArrayData arrayCopy = new UnsafeArrayData();
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 5af7ed5d6eb6..36859fbab974 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -20,6 +20,7 @@
 import java.io.*;
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.nio.ByteBuffer;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
@@ -326,6 +327,8 @@ public Object get(int ordinal, DataType dataType) {
       return getArray(ordinal);
     } else if (dataType instanceof MapType) {
       return getMap(ordinal);
+    } else if (dataType instanceof UserDefinedType) {
+      return get(ordinal, ((UserDefinedType)dataType).sqlType());
     } else {
       throw new UnsupportedOperationException("Unsupported data type " + dataType.simpleString());
     }
@@ -602,6 +605,15 @@ public void writeToMemory(Object target, long targetOffset) {
     Platform.copyMemory(baseObject, baseOffset, target, targetOffset, sizeInBytes);
   }
 
+  public void writeTo(ByteBuffer buffer) {
+    assert (buffer.hasArray());
+    byte[] target = buffer.array();
+    int offset = buffer.arrayOffset();
+    int pos = buffer.position();
+    writeToMemory(target, Platform.BYTE_ARRAY_OFFSET + offset + pos);
+    buffer.position(pos + sizeInBytes);
+  }
+
   @Override
   public void writeExternal(ObjectOutput out) throws IOException {
     byte[] bytes = getBytes();
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index a0fe5bd77e3a..7544d27e3dc1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -129,6 +129,7 @@ class CodeGenContext {
       case _: ArrayType => s"$input.getArray($ordinal)"
       case _: MapType => s"$input.getMap($ordinal)"
       case NullType => "null"
+      case udt: UserDefinedType[_] => getValue(input, udt.sqlType, ordinal)
       case _ => s"($jt)$input.get($ordinal, null)"
     }
   }
@@ -143,6 +144,7 @@ class CodeGenContext {
       case t: DecimalType => s"$row.setDecimal($ordinal, $value, ${t.precision})"
       // The UTF8String may came from UnsafeRow, otherwise clone is cheap (re-use the bytes)
       case StringType => s"$row.update($ordinal, $value.clone())"
+      case udt: UserDefinedType[_] => setColumn(row, udt.sqlType, ordinal, value)
       case _ => s"$row.update($ordinal, $value)"
     }
   }
@@ -177,6 +179,7 @@ class CodeGenContext {
     case _: MapType => "MapData"
     case dt: OpenHashSetUDT if dt.elementType == IntegerType => classOf[IntegerHashSet].getName
     case dt: OpenHashSetUDT if dt.elementType == LongType => classOf[LongHashSet].getName
+    case udt: UserDefinedType[_] => javaType(udt.sqlType)
     case ObjectType(cls) if cls.isArray => s"${javaType(ObjectType(cls.getComponentType))}[]"
     case ObjectType(cls) => cls.getName
     case _ => "Object"
@@ -222,6 +225,7 @@ class CodeGenContext {
     case FloatType => s"(java.lang.Float.isNaN($c1) && java.lang.Float.isNaN($c2)) || $c1 == $c2"
     case DoubleType => s"(java.lang.Double.isNaN($c1) && java.lang.Double.isNaN($c2)) || $c1 == $c2"
     case dt: DataType if isPrimitiveType(dt) => s"$c1 == $c2"
+    case udt: UserDefinedType[_] => genEqual(udt.sqlType, c1, c2)
     case other => s"$c1.equals($c2)"
   }
 
@@ -255,6 +259,7 @@ class CodeGenContext {
       addNewFunction(compareFunc, funcCode)
       s"this.$compareFunc($c1, $c2)"
     case other if other.isInstanceOf[AtomicType] => s"$c1.compare($c2)"
+    case udt: UserDefinedType[_] => genComp(udt.sqlType, c1, c2)
     case _ =>
       throw new IllegalArgumentException("cannot generate compare code for un-comparable type")
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index 9873630937d3..ee50587ed097 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -124,6 +124,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
     case MapType(keyType, valueType, _) => createCodeForMap(ctx, input, keyType, valueType)
     // UTF8String act as a pointer if it's inside UnsafeRow, so copy it to make it safe.
     case StringType => GeneratedExpressionCode("", "false", s"$input.clone()")
+    case udt: UserDefinedType[_] => convertToSafe(ctx, input, udt.sqlType)
     case _ => GeneratedExpressionCode("", "false", input)
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 3e0e81733fb1..1b957a508d10 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -39,6 +39,8 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     case t: StructType => t.toSeq.forall(field => canSupport(field.dataType))
     case t: ArrayType if canSupport(t.elementType) => true
     case MapType(kt, vt, _) if canSupport(kt) && canSupport(vt) => true
+    case dt: OpenHashSetUDT => false  // it's not a standard UDT
+    case udt: UserDefinedType[_] => canSupport(udt.sqlType)
     case _ => false
   }
 
@@ -77,7 +79,11 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     ctx.addMutableState(rowWriterClass, rowWriter, s"this.$rowWriter = new $rowWriterClass();")
 
     val writeFields = inputs.zip(inputTypes).zipWithIndex.map {
-      case ((input, dt), index) =>
+      case ((input, dataType), index) =>
+        val dt = dataType match {
+          case udt: UserDefinedType[_] => udt.sqlType
+          case other => other
+        }
         val tmpCursor = ctx.freshName("tmpCursor")
 
         val setNull = dt match {
@@ -167,15 +173,20 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     val index = ctx.freshName("index")
     val element = ctx.freshName("element")
 
-    val jt = ctx.javaType(elementType)
+    val et = elementType match {
+      case udt: UserDefinedType[_] => udt.sqlType
+      case other => other
+    }
+
+    val jt = ctx.javaType(et)
 
-    val fixedElementSize = elementType match {
+    val fixedElementSize = et match {
       case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS => 8
-      case _ if ctx.isPrimitiveType(jt) => elementType.defaultSize
+      case _ if ctx.isPrimitiveType(jt) => et.defaultSize
       case _ => 0
     }
 
-    val writeElement = elementType match {
+    val writeElement = et match {
       case t: StructType =>
         s"""
           $arrayWriter.setOffset($index);
@@ -194,13 +205,13 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
           ${writeMapToBuffer(ctx, element, kt, vt, bufferHolder)}
         """
 
-      case _ if ctx.isPrimitiveType(elementType) =>
+      case _ if ctx.isPrimitiveType(et) =>
         // Should we do word align?
-        val dataSize = elementType.defaultSize
+        val dataSize = et.defaultSize
 
         s"""
           $arrayWriter.setOffset($index);
-          ${writePrimitiveType(ctx, element, elementType,
+          ${writePrimitiveType(ctx, element, et,
             s"$bufferHolder.buffer", s"$bufferHolder.cursor")}
           $bufferHolder.cursor += $dataSize;
         """
@@ -237,7 +248,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
           if ($input.isNullAt($index)) {
             $arrayWriter.setNullAt($index);
           } else {
-            final $jt $element = ${ctx.getValue(input, elementType, index)};
+            final $jt $element = ${ctx.getValue(input, et, index)};
             $writeElement
           }
         }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
index 62478667eb4f..42ec4d3433f1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
@@ -19,8 +19,7 @@ package org.apache.spark.sql.columnar
 
 import java.nio.{ByteBuffer, ByteOrder}
 
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.MutableRow
+import org.apache.spark.sql.catalyst.expressions.{MutableRow, UnsafeArrayData, UnsafeMapData, UnsafeRow}
 import org.apache.spark.sql.columnar.compression.CompressibleColumnAccessor
 import org.apache.spark.sql.types._
 
@@ -109,15 +108,15 @@ private[sql] class DecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalTy
   with NullableColumnAccessor
 
 private[sql] class StructColumnAccessor(buffer: ByteBuffer, dataType: StructType)
-  extends BasicColumnAccessor[InternalRow](buffer, STRUCT(dataType))
+  extends BasicColumnAccessor[UnsafeRow](buffer, STRUCT(dataType))
   with NullableColumnAccessor
 
 private[sql] class ArrayColumnAccessor(buffer: ByteBuffer, dataType: ArrayType)
-  extends BasicColumnAccessor[ArrayData](buffer, ARRAY(dataType))
+  extends BasicColumnAccessor[UnsafeArrayData](buffer, ARRAY(dataType))
   with NullableColumnAccessor
 
 private[sql] class MapColumnAccessor(buffer: ByteBuffer, dataType: MapType)
-  extends BasicColumnAccessor[MapData](buffer, MAP(dataType))
+  extends BasicColumnAccessor[UnsafeMapData](buffer, MAP(dataType))
   with NullableColumnAccessor
 
 private[sql] object ColumnAccessor {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index 3563eacb3a3e..2bc2c96b6163 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.columnar
 
 import java.math.{BigDecimal, BigInteger}
-import java.nio.{ByteOrder, ByteBuffer}
+import java.nio.ByteBuffer
 
 import scala.reflect.runtime.universe.TypeTag
 
@@ -92,7 +92,7 @@ private[sql] sealed abstract class ColumnType[JvmType] {
    * boxing/unboxing costs whenever possible.
    */
   def copyField(from: InternalRow, fromOrdinal: Int, to: MutableRow, toOrdinal: Int): Unit = {
-    to.update(toOrdinal, from.get(fromOrdinal, dataType))
+    setField(to, toOrdinal, getField(from, fromOrdinal))
   }
 
   /**
@@ -147,6 +147,7 @@ private[sql] object INT extends NativeColumnType(IntegerType, 4) {
 
   override def getField(row: InternalRow, ordinal: Int): Int = row.getInt(ordinal)
 
+
   override def copyField(from: InternalRow, fromOrdinal: Int, to: MutableRow, toOrdinal: Int) {
     to.setInt(toOrdinal, from.getInt(fromOrdinal))
   }
@@ -324,15 +325,18 @@ private[sql] object STRING extends NativeColumnType(StringType, 8) {
   }
 
   override def append(v: UTF8String, buffer: ByteBuffer): Unit = {
-    val stringBytes = v.getBytes
-    buffer.putInt(stringBytes.length).put(stringBytes, 0, stringBytes.length)
+    buffer.putInt(v.numBytes())
+    v.writeTo(buffer)
   }
 
   override def extract(buffer: ByteBuffer): UTF8String = {
     val length = buffer.getInt()
-    val stringBytes = new Array[Byte](length)
-    buffer.get(stringBytes, 0, length)
-    UTF8String.fromBytes(stringBytes)
+    assert(buffer.hasArray)
+    val base = buffer.array()
+    val offset = buffer.arrayOffset()
+    val cursor = buffer.position()
+    buffer.position(cursor + length)
+    UTF8String.fromBytes(base, offset + cursor, length)
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: UTF8String): Unit = {
@@ -386,11 +390,6 @@ private[sql] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize:
   def serialize(value: JvmType): Array[Byte]
   def deserialize(bytes: Array[Byte]): JvmType
 
-  override def actualSize(row: InternalRow, ordinal: Int): Int = {
-    // TODO: grow the buffer in append(), so serialize() will not be called twice
-    serialize(getField(row, ordinal)).length + 4
-  }
-
   override def append(v: JvmType, buffer: ByteBuffer): Unit = {
     val bytes = serialize(v)
     buffer.putInt(bytes.length).put(bytes, 0, bytes.length)
@@ -416,6 +415,10 @@ private[sql] object BINARY extends ByteArrayColumnType[Array[Byte]](16) {
     row.getBinary(ordinal)
   }
 
+  override def actualSize(row: InternalRow, ordinal: Int): Int = {
+    row.getBinary(ordinal).length + 4
+  }
+
   def serialize(value: Array[Byte]): Array[Byte] = value
   def deserialize(bytes: Array[Byte]): Array[Byte] = bytes
 }
@@ -433,6 +436,10 @@ private[sql] case class LARGE_DECIMAL(precision: Int, scale: Int)
     row.setDecimal(ordinal, value, precision)
   }
 
+  override def actualSize(row: InternalRow, ordinal: Int): Int = {
+    4 + getField(row, ordinal).toJavaBigDecimal.unscaledValue().bitLength() / 8 + 1
+  }
+
   override def serialize(value: Decimal): Array[Byte] = {
     value.toJavaBigDecimal.unscaledValue().toByteArray
   }
@@ -449,124 +456,118 @@ private[sql] object LARGE_DECIMAL {
   }
 }
 
-private[sql] case class STRUCT(dataType: StructType)
-  extends ByteArrayColumnType[InternalRow](20) {
+private[sql] case class STRUCT(dataType: StructType) extends ColumnType[UnsafeRow] {
 
-  private val projection: UnsafeProjection =
-    UnsafeProjection.create(dataType)
   private val numOfFields: Int = dataType.fields.size
 
-  override def setField(row: MutableRow, ordinal: Int, value: InternalRow): Unit = {
+  override def defaultSize: Int = 20
+
+  override def setField(row: MutableRow, ordinal: Int, value: UnsafeRow): Unit = {
     row.update(ordinal, value)
   }
 
-  override def getField(row: InternalRow, ordinal: Int): InternalRow = {
-    row.getStruct(ordinal, numOfFields)
+  override def getField(row: InternalRow, ordinal: Int): UnsafeRow = {
+    row.getStruct(ordinal, numOfFields).asInstanceOf[UnsafeRow]
   }
 
-  override def serialize(value: InternalRow): Array[Byte] = {
-    val unsafeRow = if (value.isInstanceOf[UnsafeRow]) {
-      value.asInstanceOf[UnsafeRow]
-    } else {
-      projection(value)
-    }
-    unsafeRow.getBytes
+  override def actualSize(row: InternalRow, ordinal: Int): Int = {
+    4 + getField(row, ordinal).getSizeInBytes
   }
 
-  override def deserialize(bytes: Array[Byte]): InternalRow = {
+  override def append(value: UnsafeRow, buffer: ByteBuffer): Unit = {
+    buffer.putInt(value.getSizeInBytes)
+    value.writeTo(buffer)
+  }
+
+  override def extract(buffer: ByteBuffer): UnsafeRow = {
+    val sizeInBytes = buffer.getInt()
+    assert(buffer.hasArray)
+    val base = buffer.array()
+    val offset = buffer.arrayOffset()
+    val cursor = buffer.position()
+    buffer.position(cursor + sizeInBytes)
     val unsafeRow = new UnsafeRow
-    unsafeRow.pointTo(bytes, numOfFields, bytes.length)
+    unsafeRow.pointTo(base, Platform.BYTE_ARRAY_OFFSET + offset + cursor, numOfFields, sizeInBytes)
     unsafeRow
   }
 
-  override def clone(v: InternalRow): InternalRow = v.copy()
+  override def clone(v: UnsafeRow): UnsafeRow = v.copy()
 }
 
-private[sql] case class ARRAY(dataType: ArrayType)
-  extends ByteArrayColumnType[ArrayData](16) {
+private[sql] case class ARRAY(dataType: ArrayType) extends ColumnType[UnsafeArrayData] {
 
-  private lazy val projection = UnsafeProjection.create(Array[DataType](dataType))
-  private val mutableRow = new GenericMutableRow(new Array[Any](1))
+  override def defaultSize: Int = 16
 
-  override def setField(row: MutableRow, ordinal: Int, value: ArrayData): Unit = {
+  override def setField(row: MutableRow, ordinal: Int, value: UnsafeArrayData): Unit = {
     row.update(ordinal, value)
   }
 
-  override def getField(row: InternalRow, ordinal: Int): ArrayData = {
-    row.getArray(ordinal)
+  override def getField(row: InternalRow, ordinal: Int): UnsafeArrayData = {
+    row.getArray(ordinal).asInstanceOf[UnsafeArrayData]
   }
 
-  override def serialize(value: ArrayData): Array[Byte] = {
-    val unsafeArray = if (value.isInstanceOf[UnsafeArrayData]) {
-      value.asInstanceOf[UnsafeArrayData]
-    } else {
-      mutableRow(0) = value
-      projection(mutableRow).getArray(0)
-    }
-    val outputBuffer =
-      ByteBuffer.allocate(4 + unsafeArray.getSizeInBytes).order(ByteOrder.nativeOrder())
-    outputBuffer.putInt(unsafeArray.numElements())
-    val underlying = outputBuffer.array()
-    unsafeArray.writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 4)
-    underlying
+  override def actualSize(row: InternalRow, ordinal: Int): Int = {
+    val unsafeArray = getField(row, ordinal)
+    4 + 4 + unsafeArray.getSizeInBytes
   }
 
-  override def deserialize(bytes: Array[Byte]): ArrayData = {
-    val buffer = ByteBuffer.wrap(bytes).order(ByteOrder.nativeOrder())
-    val numElements = buffer.getInt
-    val array = new UnsafeArrayData
-    array.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 4, numElements, bytes.length - 4)
-    array
+  override def append(value: UnsafeArrayData, buffer: ByteBuffer): Unit = {
+    buffer.putInt(4 + value.getSizeInBytes)
+    buffer.putInt(value.numElements())
+    value.writeTo(buffer)
   }
 
-  override def clone(v: ArrayData): ArrayData = v.copy()
+  override def extract(buffer: ByteBuffer): UnsafeArrayData = {
+    val numBytes = buffer.getInt
+    assert(buffer.hasArray)
+    val cursor = buffer.position()
+    buffer.position(cursor + numBytes)
+    UnsafeReaders.readArray(
+      buffer.array(),
+      Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + cursor,
+      numBytes)
+  }
+
+  override def clone(v: UnsafeArrayData): UnsafeArrayData = v.copy()
 }
 
-private[sql] case class MAP(dataType: MapType) extends ByteArrayColumnType[MapData](32) {
+private[sql] case class MAP(dataType: MapType) extends ColumnType[UnsafeMapData] {
 
-  private lazy val projection: UnsafeProjection = UnsafeProjection.create(Array[DataType](dataType))
-  private val mutableRow = new GenericMutableRow(new Array[Any](1))
+  override def defaultSize: Int = 32
 
-  override def setField(row: MutableRow, ordinal: Int, value: MapData): Unit = {
+  override def setField(row: MutableRow, ordinal: Int, value: UnsafeMapData): Unit = {
     row.update(ordinal, value)
   }
 
-  override def getField(row: InternalRow, ordinal: Int): MapData = {
-    row.getMap(ordinal)
+  override def getField(row: InternalRow, ordinal: Int): UnsafeMapData = {
+    row.getMap(ordinal).asInstanceOf[UnsafeMapData]
   }
 
-  override def serialize(value: MapData): Array[Byte] = {
-    val unsafeMap = if (value.isInstanceOf[UnsafeMapData]) {
-      value.asInstanceOf[UnsafeMapData]
-    } else {
-      mutableRow(0) = value
-      projection(mutableRow).getMap(0)
-    }
+  override def actualSize(row: InternalRow, ordinal: Int): Int = {
+    val unsafeMap = getField(row, ordinal)
+    12 + unsafeMap.keyArray().getSizeInBytes + unsafeMap.valueArray().getSizeInBytes
+  }
+
+  override def append(value: UnsafeMapData, buffer: ByteBuffer): Unit = {
+    buffer.putInt(8 + value.keyArray().getSizeInBytes + value.valueArray().getSizeInBytes)
+    buffer.putInt(value.numElements())
+    buffer.putInt(value.keyArray().getSizeInBytes)
+    value.keyArray().writeTo(buffer)
+    value.valueArray().writeTo(buffer)
+  }
+
+  override def extract(buffer: ByteBuffer): UnsafeMapData = {
+    val numBytes = buffer.getInt
+    assert(buffer.hasArray)
+    val cursor = buffer.position()
+    buffer.position(cursor + numBytes)
+    UnsafeReaders.readMap(
+      buffer.array(),
+      Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + cursor,
+      numBytes)
+  }
 
-    val outputBuffer =
-      ByteBuffer.allocate(8 + unsafeMap.getSizeInBytes).order(ByteOrder.nativeOrder())
-    outputBuffer.putInt(unsafeMap.numElements())
-    val keyBytes = unsafeMap.keyArray().getSizeInBytes
-    outputBuffer.putInt(keyBytes)
-    val underlying = outputBuffer.array()
-    unsafeMap.keyArray().writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 8)
-    unsafeMap.valueArray().writeToMemory(underlying, Platform.BYTE_ARRAY_OFFSET + 8 + keyBytes)
-    underlying
-  }
-
-  override def deserialize(bytes: Array[Byte]): MapData = {
-    val buffer = ByteBuffer.wrap(bytes).order(ByteOrder.nativeOrder())
-    val numElements = buffer.getInt
-    val keyArraySize = buffer.getInt
-    val keyArray = new UnsafeArrayData
-    val valueArray = new UnsafeArrayData
-    keyArray.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 8, numElements, keyArraySize)
-    valueArray.pointTo(bytes, Platform.BYTE_ARRAY_OFFSET + 8 + keyArraySize, numElements,
-      bytes.length - 8 - keyArraySize)
-    new UnsafeMapData(keyArray, valueArray)
-  }
-
-  override def clone(v: MapData): MapData = v.copy()
+  override def clone(v: UnsafeMapData): UnsafeMapData = v.copy()
 }
 
 private[sql] object ColumnType {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index d7e145f9c2bb..d967814f627c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -27,7 +27,7 @@ import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Statistics}
-import org.apache.spark.sql.execution.{LeafNode, SparkPlan}
+import org.apache.spark.sql.execution.{ConvertToUnsafe, LeafNode, SparkPlan}
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.{Accumulable, Accumulator, Accumulators}
 
@@ -38,7 +38,9 @@ private[sql] object InMemoryRelation {
       storageLevel: StorageLevel,
       child: SparkPlan,
       tableName: Option[String]): InMemoryRelation =
-    new InMemoryRelation(child.output, useCompression, batchSize, storageLevel, child, tableName)()
+    new InMemoryRelation(child.output, useCompression, batchSize, storageLevel,
+      if (child.outputsUnsafeRows) child else ConvertToUnsafe(child),
+      tableName)()
 }
 
 private[sql] case class CachedBatch(buffers: Array[Array[Byte]], stats: InternalRow)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
index ceb8ad97bb32..0e6e1bcf7289 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
@@ -17,11 +17,11 @@
 
 package org.apache.spark.sql.columnar
 
-import java.nio.ByteBuffer
+import java.nio.{ByteOrder, ByteBuffer}
 
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.catalyst.expressions.{UnsafeProjection, GenericMutableRow}
 import org.apache.spark.sql.columnar.ColumnarTestUtils._
 import org.apache.spark.sql.types._
 import org.apache.spark.{Logging, SparkFunSuite}
@@ -55,7 +55,8 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
       assertResult(expected, s"Wrong actualSize for $columnType") {
         val row = new GenericMutableRow(1)
         row.update(0, CatalystTypeConverters.convertToCatalyst(value))
-        columnType.actualSize(row, 0)
+        val proj = UnsafeProjection.create(Array[DataType](columnType.dataType))
+        columnType.actualSize(proj(row), 0)
       }
     }
 
@@ -99,35 +100,27 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
 
   def testColumnType[JvmType](columnType: ColumnType[JvmType]): Unit = {
 
-    val buffer = ByteBuffer.allocate(DEFAULT_BUFFER_SIZE)
-    val seq = (0 until 4).map(_ => makeRandomValue(columnType))
+    val buffer = ByteBuffer.allocate(DEFAULT_BUFFER_SIZE).order(ByteOrder.nativeOrder())
+    val proj = UnsafeProjection.create(Array[DataType](columnType.dataType))
     val converter = CatalystTypeConverters.createToScalaConverter(columnType.dataType)
+    val seq = (0 until 4).map(_ => proj(makeRandomRow(columnType)).copy())
 
     test(s"$columnType append/extract") {
       buffer.rewind()
-      seq.foreach(columnType.append(_, buffer))
+      seq.foreach(columnType.append(_, 0, buffer))
 
       buffer.rewind()
-      seq.foreach { expected =>
-        logInfo("buffer = " + buffer + ", expected = " + expected)
-        val extracted = columnType.extract(buffer)
-        assert(
-          converter(expected) === converter(extracted),
-          "Extracted value didn't equal to the original one. " +
-            hexDump(expected) + " != " + hexDump(extracted) +
-            ", buffer = " + dumpBuffer(buffer.duplicate().rewind().asInstanceOf[ByteBuffer]))
+      seq.foreach { row =>
+        logInfo("buffer = " + buffer + ", expected = " + row)
+        val expected = converter(row.get(0, columnType.dataType))
+        val extracted = converter(columnType.extract(buffer))
+        assert(expected === extracted,
+          s"Extracted value didn't equal to the original one. $expected != $extracted, buffer =" +
+          dumpBuffer(buffer.duplicate().rewind().asInstanceOf[ByteBuffer]))
       }
     }
   }
 
-  private def hexDump(value: Any): String = {
-    if (value == null) {
-      ""
-    } else {
-      value.toString.map(ch => Integer.toHexString(ch & 0xffff)).mkString(" ")
-    }
-  }
-
   private def dumpBuffer(buff: ByteBuffer): Any = {
     val sb = new StringBuilder()
     while (buff.hasRemaining) {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
index 78cebbf3cc93..aa1605fee8c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
@@ -21,7 +21,7 @@ import java.nio.ByteBuffer
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.catalyst.expressions.{UnsafeProjection, GenericMutableRow}
 import org.apache.spark.sql.types._
 
 class TestNullableColumnAccessor[JvmType](
@@ -64,10 +64,11 @@ class NullableColumnAccessorSuite extends SparkFunSuite {
     test(s"Nullable $typeName column accessor: access null values") {
       val builder = TestNullableColumnBuilder(columnType)
       val randomRow = makeRandomRow(columnType)
+      val proj = UnsafeProjection.create(Array[DataType](columnType.dataType))
 
       (0 until 4).foreach { _ =>
-        builder.appendFrom(randomRow, 0)
-        builder.appendFrom(nullRow, 0)
+        builder.appendFrom(proj(randomRow), 0)
+        builder.appendFrom(proj(nullRow), 0)
       }
 
       val accessor = TestNullableColumnAccessor(builder.build(), columnType)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
index fba08e626d72..91404577832a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.columnar
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.catalyst.expressions.{UnsafeProjection, GenericMutableRow}
 import org.apache.spark.sql.types._
 
 class TestNullableColumnBuilder[JvmType](columnType: ColumnType[JvmType])
@@ -51,6 +51,9 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       columnType: ColumnType[JvmType]): Unit = {
 
     val typeName = columnType.getClass.getSimpleName.stripSuffix("$")
+    val dataType = columnType.dataType
+    val proj = UnsafeProjection.create(Array[DataType](dataType))
+    val converter = CatalystTypeConverters.createToScalaConverter(dataType)
 
     test(s"$typeName column builder: empty column") {
       val columnBuilder = TestNullableColumnBuilder(columnType)
@@ -65,7 +68,7 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       val randomRow = makeRandomRow(columnType)
 
       (0 until 4).foreach { _ =>
-        columnBuilder.appendFrom(randomRow, 0)
+        columnBuilder.appendFrom(proj(randomRow), 0)
       }
 
       val buffer = columnBuilder.build()
@@ -77,12 +80,10 @@ class NullableColumnBuilderSuite extends SparkFunSuite {
       val columnBuilder = TestNullableColumnBuilder(columnType)
       val randomRow = makeRandomRow(columnType)
       val nullRow = makeNullRow(1)
-      val dataType = columnType.dataType
-      val converter = CatalystTypeConverters.createToScalaConverter(dataType)
 
       (0 until 4).foreach { _ =>
-        columnBuilder.appendFrom(randomRow, 0)
-        columnBuilder.appendFrom(nullRow, 0)
+        columnBuilder.appendFrom(proj(randomRow), 0)
+        columnBuilder.appendFrom(proj(nullRow), 0)
       }
 
       val buffer = columnBuilder.build()
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java b/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
index 216aeea60d1c..b7aecb5102ba 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
@@ -19,6 +19,7 @@
 
 import javax.annotation.Nonnull;
 import java.io.*;
+import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.util.Arrays;
 import java.util.Map;
@@ -137,6 +138,15 @@ public void writeToMemory(Object target, long targetOffset) {
     Platform.copyMemory(base, offset, target, targetOffset, numBytes);
   }
 
+  public void writeTo(ByteBuffer buffer) {
+    assert(buffer.hasArray());
+    byte[] target = buffer.array();
+    int offset = buffer.arrayOffset();
+    int pos = buffer.position();
+    writeToMemory(target, Platform.BYTE_ARRAY_OFFSET + offset + pos);
+    buffer.position(pos + numBytes);
+  }
+
   /**
    * Returns the number of bytes for a code point with the first byte as `b`
    * @param b The first byte of a code point

From 626aab79c9b4d4ac9d65bf5fa45b81dd9cbc609c Mon Sep 17 00:00:00 2001
From: Lianhui Wang <lianhuiwang09@gmail.com>
Date: Tue, 13 Oct 2015 08:29:47 -0500
Subject: [PATCH 214/896] [SPARK-11026] [YARN] spark.yarn.user.classpath.first
 does work for 'spark-submit --jars hdfs://user/foo.jar'

when spark.yarn.user.classpath.first=true and using 'spark-submit --jars hdfs://user/foo.jar', it can not put foo.jar to system classpath. so we need to put yarn's linkNames of jars to the system classpath. vanzin tgravescs

Author: Lianhui Wang <lianhuiwang09@gmail.com>

Closes #9045 from lianhuiwang/spark-11026.
---
 .../org/apache/spark/deploy/yarn/Client.scala | 23 ++++++++++++-------
 1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index d25d830fd434..9fcfe362a3ba 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -1212,7 +1212,7 @@ object Client extends Logging {
         } else {
           getMainJarUri(sparkConf.getOption(CONF_SPARK_USER_JAR))
         }
-      mainJar.foreach(addFileToClasspath(sparkConf, _, APP_JAR, env))
+      mainJar.foreach(addFileToClasspath(sparkConf, conf, _, APP_JAR, env))
 
       val secondaryJars =
         if (args != null) {
@@ -1221,10 +1221,10 @@ object Client extends Logging {
           getSecondaryJarUris(sparkConf.getOption(CONF_SPARK_YARN_SECONDARY_JARS))
         }
       secondaryJars.foreach { x =>
-        addFileToClasspath(sparkConf, x, null, env)
+        addFileToClasspath(sparkConf, conf, x, null, env)
       }
     }
-    addFileToClasspath(sparkConf, new URI(sparkJar(sparkConf)), SPARK_JAR, env)
+    addFileToClasspath(sparkConf, conf, new URI(sparkJar(sparkConf)), SPARK_JAR, env)
     populateHadoopClasspath(conf, env)
     sys.env.get(ENV_DIST_CLASSPATH).foreach { cp =>
       addClasspathEntry(getClusterPath(sparkConf, cp), env)
@@ -1259,15 +1259,17 @@ object Client extends Logging {
    * If an alternate name for the file is given, and it's not a "local:" file, the alternate
    * name will be added to the classpath (relative to the job's work directory).
    *
-   * If not a "local:" file and no alternate name, the environment is not modified.
+   * If not a "local:" file and no alternate name, the linkName will be added to the classpath.
    *
-   * @param conf      Spark configuration.
-   * @param uri       URI to add to classpath (optional).
-   * @param fileName  Alternate name for the file (optional).
-   * @param env       Map holding the environment variables.
+   * @param conf        Spark configuration.
+   * @param hadoopConf  Hadoop configuration.
+   * @param uri         URI to add to classpath (optional).
+   * @param fileName    Alternate name for the file (optional).
+   * @param env         Map holding the environment variables.
    */
   private def addFileToClasspath(
       conf: SparkConf,
+      hadoopConf: Configuration,
       uri: URI,
       fileName: String,
       env: HashMap[String, String]): Unit = {
@@ -1276,6 +1278,11 @@ object Client extends Logging {
     } else if (fileName != null) {
       addClasspathEntry(buildPath(
         YarnSparkHadoopUtil.expandEnvironment(Environment.PWD), fileName), env)
+    } else if (uri != null) {
+      val localPath = getQualifiedLocalPath(uri, hadoopConf)
+      val linkName = Option(uri.getFragment()).getOrElse(localPath.getName())
+      addClasspathEntry(buildPath(
+        YarnSparkHadoopUtil.expandEnvironment(Environment.PWD), linkName), env)
     }
   }
 

From 6987c067937a50867b4d5788f5bf496ecdfdb62c Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 13 Oct 2015 09:40:36 -0700
Subject: [PATCH 215/896] [SPARK-11009] [SQL] fix wrong result of Window
 function in cluster mode

Currently, All windows function could generate wrong result in cluster sometimes.

The root cause is that AttributeReference is called in executor, then id of it may not be unique than others created in driver.

Here is the script that could reproduce the problem (run in local cluster):
```
from pyspark import SparkContext, HiveContext
from pyspark.sql.window import Window
from pyspark.sql.functions import rowNumber

sqlContext = HiveContext(SparkContext())
sqlContext.setConf("spark.sql.shuffle.partitions", "3")
df =  sqlContext.range(1<<20)
df2 = df.select((df.id % 1000).alias("A"), (df.id / 1000).alias('B'))
ws = Window.partitionBy(df2.A).orderBy(df2.B)
df3 = df2.select("client", "date", rowNumber().over(ws).alias("rn")).filter("rn < 0")
assert df3.count() == 0
```

Author: Davies Liu <davies@databricks.com>
Author: Yin Huai <yhuai@databricks.com>

Closes #9050 from davies/wrong_window.
---
 .../apache/spark/sql/execution/Window.scala   | 20 ++++-----
 .../spark/sql/hive/HiveSparkSubmitSuite.scala | 41 +++++++++++++++++++
 2 files changed, 51 insertions(+), 10 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
index f8929530c503..55035f4bc5f2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
@@ -145,11 +145,10 @@ case class Window(
         // Construct the ordering. This is used to compare the result of current value projection
         // to the result of bound value projection. This is done manually because we want to use
         // Code Generation (if it is enabled).
-        val (sortExprs, schema) = exprs.map { case e =>
-          val ref = AttributeReference("ordExpr", e.dataType, e.nullable)()
-          (SortOrder(ref, e.direction), ref)
-        }.unzip
-        val ordering = newOrdering(sortExprs, schema)
+        val sortExprs = exprs.zipWithIndex.map { case (e, i) =>
+          SortOrder(BoundReference(i, e.dataType, e.nullable), e.direction)
+        }
+        val ordering = newOrdering(sortExprs, Nil)
         RangeBoundOrdering(ordering, current, bound)
       case RowFrame => RowBoundOrdering(offset)
     }
@@ -205,14 +204,15 @@ case class Window(
    */
   private[this] def createResultProjection(
       expressions: Seq[Expression]): MutableProjection = {
-    val unboundToAttr = expressions.map {
-      e => (e, AttributeReference("windowResult", e.dataType, e.nullable)())
+    val references = expressions.zipWithIndex.map{ case (e, i) =>
+      // Results of window expressions will be on the right side of child's output
+      BoundReference(child.output.size + i, e.dataType, e.nullable)
     }
-    val unboundToAttrMap = unboundToAttr.toMap
-    val patchedWindowExpression = windowExpression.map(_.transform(unboundToAttrMap))
+    val unboundToRefMap = expressions.zip(references).toMap
+    val patchedWindowExpression = windowExpression.map(_.transform(unboundToRefMap))
     newMutableProjection(
       projectList ++ patchedWindowExpression,
-      child.output ++ unboundToAttr.map(_._2))()
+      child.output)()
   }
 
   protected override def doExecute(): RDD[InternalRow] = {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
index 5f1660b62d41..10e4ae2c5030 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
@@ -30,6 +30,7 @@ import org.scalatest.time.SpanSugar._
 
 import org.apache.spark._
 import org.apache.spark.sql.{SQLContext, QueryTest}
+import org.apache.spark.sql.expressions.Window
 import org.apache.spark.sql.hive.test.{TestHive, TestHiveContext}
 import org.apache.spark.sql.test.ProcessTestUtils.ProcessOutputCapturer
 import org.apache.spark.sql.types.DecimalType
@@ -107,6 +108,16 @@ class HiveSparkSubmitSuite
     runSparkSubmit(args)
   }
 
+  test("SPARK-11009 fix wrong result of Window function in cluster mode") {
+    val unusedJar = TestUtils.createJarWithClasses(Seq.empty)
+    val args = Seq(
+      "--class", SPARK_11009.getClass.getName.stripSuffix("$"),
+      "--name", "SparkSQLConfTest",
+      "--master", "local-cluster[2,1,1024]",
+      unusedJar.toString)
+    runSparkSubmit(args)
+  }
+
   // NOTE: This is an expensive operation in terms of time (10 seconds+). Use sparingly.
   // This is copied from org.apache.spark.deploy.SparkSubmitSuite
   private def runSparkSubmit(args: Seq[String]): Unit = {
@@ -320,3 +331,33 @@ object SPARK_9757 extends QueryTest {
     }
   }
 }
+
+object SPARK_11009 extends QueryTest {
+  import org.apache.spark.sql.functions._
+
+  protected var sqlContext: SQLContext = _
+
+  def main(args: Array[String]): Unit = {
+    Utils.configTestLog4j("INFO")
+
+    val sparkContext = new SparkContext(
+      new SparkConf()
+        .set("spark.ui.enabled", "false")
+        .set("spark.sql.shuffle.partitions", "100"))
+
+    val hiveContext = new TestHiveContext(sparkContext)
+    sqlContext = hiveContext
+
+    try {
+      val df = sqlContext.range(1 << 20)
+      val df2 = df.select((df("id") % 1000).alias("A"), (df("id") / 1000).alias("B"))
+      val ws = Window.partitionBy(df2("A")).orderBy(df2("B"))
+      val df3 = df2.select(df2("A"), df2("B"), rowNumber().over(ws).alias("rn")).filter("rn < 0")
+      if (df3.rdd.count() != 0) {
+        throw new Exception("df3 should have 0 output row.")
+      }
+    } finally {
+      sparkContext.stop()
+    }
+  }
+}

From 1797055dbf1d2fd7714d7c65c8d2efde2f15efc1 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 13 Oct 2015 09:51:20 -0700
Subject: [PATCH 216/896] [SPARK-11079] Post-hoc review Netty-based RPC - round
 1

I'm going through the implementation right now for post-doc review. Adding more comments and renaming things as I go through them.

I also want to write higher level documentation about how the whole thing works -- but those will come in other pull requests.

Author: Reynold Xin <rxin@databricks.com>

Closes #9091 from rxin/rpc-review.
---
 .../org/apache/spark/MapOutputTracker.scala   |   2 +-
 .../org/apache/spark/rpc/RpcAddress.scala     |  50 ++++++
 .../org/apache/spark/rpc/RpcEndpoint.scala    |   3 +-
 .../scala/org/apache/spark/rpc/RpcEnv.scala   | 153 +-----------------
 .../org/apache/spark/rpc/RpcTimeout.scala     | 131 +++++++++++++++
 .../apache/spark/rpc/akka/AkkaRpcEnv.scala    |   4 -
 .../apache/spark/rpc/netty/Dispatcher.scala   | 108 +++++++------
 .../apache/spark/rpc/netty/IDVerifier.scala   |   4 +-
 .../org/apache/spark/rpc/netty/Inbox.scala    | 119 ++++++--------
 .../spark/rpc/netty/NettyRpcCallContext.scala |  11 +-
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  |  38 +++--
 .../org/apache/spark/util/ThreadUtils.scala   |   1 -
 .../scala/org/apache/spark/util/Utils.scala   |   1 +
 .../apache/spark/rpc/netty/InboxSuite.scala   |   6 +-
 .../rpc/netty/NettyRpcHandlerSuite.scala      |   7 +-
 15 files changed, 336 insertions(+), 302 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/RpcAddress.scala
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/RpcTimeout.scala

diff --git a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
index 45e12e40c837..72355cdfa68b 100644
--- a/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
+++ b/core/src/main/scala/org/apache/spark/MapOutputTracker.scala
@@ -48,7 +48,7 @@ private[spark] class MapOutputTrackerMasterEndpoint(
       val hostPort = context.senderAddress.hostPort
       logInfo("Asked to send map output locations for shuffle " + shuffleId + " to " + hostPort)
       val mapOutputStatuses = tracker.getSerializedMapOutputStatuses(shuffleId)
-      val serializedSize = mapOutputStatuses.size
+      val serializedSize = mapOutputStatuses.length
       if (serializedSize > maxAkkaFrameSize) {
         val msg = s"Map output statuses were $serializedSize bytes which " +
           s"exceeds spark.akka.frameSize ($maxAkkaFrameSize bytes)."
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcAddress.scala b/core/src/main/scala/org/apache/spark/rpc/RpcAddress.scala
new file mode 100644
index 000000000000..eb0b26947f50
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcAddress.scala
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc
+
+import org.apache.spark.util.Utils
+
+
+/**
+ * Address for an RPC environment, with hostname and port.
+ */
+private[spark] case class RpcAddress(host: String, port: Int) {
+
+  def hostPort: String = host + ":" + port
+
+  /** Returns a string in the form of "spark://host:port". */
+  def toSparkURL: String = "spark://" + hostPort
+
+  override def toString: String = hostPort
+}
+
+
+private[spark] object RpcAddress {
+
+  /** Return the [[RpcAddress]] represented by `uri`. */
+  def fromURIString(uri: String): RpcAddress = {
+    val uriObj = new java.net.URI(uri)
+    RpcAddress(uriObj.getHost, uriObj.getPort)
+  }
+
+  /** Returns the [[RpcAddress]] encoded in the form of "spark://host:port" */
+  def fromSparkURL(sparkUrl: String): RpcAddress = {
+    val (host, port) = Utils.extractHostPortFromSparkUrl(sparkUrl)
+    RpcAddress(host, port)
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
index f1ddc6d2cd43..0ba95169529e 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpoint.scala
@@ -145,5 +145,4 @@ private[spark] trait RpcEndpoint {
  * However, there is no guarantee that the same thread will be executing the same
  * [[ThreadSafeRpcEndpoint]] for different messages.
  */
-private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint {
-}
+private[spark] trait ThreadSafeRpcEndpoint extends RpcEndpoint
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index 35e402c72533..ef491a0ae4f0 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -17,12 +17,7 @@
 
 package org.apache.spark.rpc
 
-import java.net.URI
-import java.util.concurrent.TimeoutException
-
-import scala.concurrent.{Awaitable, Await, Future}
-import scala.concurrent.duration._
-import scala.language.postfixOps
+import scala.concurrent.Future
 
 import org.apache.spark.{SecurityManager, SparkConf}
 import org.apache.spark.util.{RpcUtils, Utils}
@@ -35,8 +30,8 @@ import org.apache.spark.util.{RpcUtils, Utils}
 private[spark] object RpcEnv {
 
   private def getRpcEnvFactory(conf: SparkConf): RpcEnvFactory = {
-    // Add more RpcEnv implementations here
-    val rpcEnvNames = Map("akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory",
+    val rpcEnvNames = Map(
+      "akka" -> "org.apache.spark.rpc.akka.AkkaRpcEnvFactory",
       "netty" -> "org.apache.spark.rpc.netty.NettyRpcEnvFactory")
     val rpcEnvName = conf.get("spark.rpc", "netty")
     val rpcEnvFactoryClassName = rpcEnvNames.getOrElse(rpcEnvName.toLowerCase, rpcEnvName)
@@ -53,7 +48,6 @@ private[spark] object RpcEnv {
     val config = RpcEnvConfig(conf, name, host, port, securityManager)
     getRpcEnvFactory(conf).create(config)
   }
-
 }
 
 
@@ -155,144 +149,3 @@ private[spark] case class RpcEnvConfig(
     host: String,
     port: Int,
     securityManager: SecurityManager)
-
-
-/**
- * Represents a host and port.
- */
-private[spark] case class RpcAddress(host: String, port: Int) {
-  // TODO do we need to add the type of RpcEnv in the address?
-
-  val hostPort: String = host + ":" + port
-
-  override val toString: String = hostPort
-
-  def toSparkURL: String = "spark://" + hostPort
-}
-
-
-private[spark] object RpcAddress {
-
-  /**
-   * Return the [[RpcAddress]] represented by `uri`.
-   */
-  def fromURI(uri: URI): RpcAddress = {
-    RpcAddress(uri.getHost, uri.getPort)
-  }
-
-  /**
-   * Return the [[RpcAddress]] represented by `uri`.
-   */
-  def fromURIString(uri: String): RpcAddress = {
-    fromURI(new java.net.URI(uri))
-  }
-
-  def fromSparkURL(sparkUrl: String): RpcAddress = {
-    val (host, port) = Utils.extractHostPortFromSparkUrl(sparkUrl)
-    RpcAddress(host, port)
-  }
-}
-
-
-/**
- * An exception thrown if RpcTimeout modifies a [[TimeoutException]].
- */
-private[rpc] class RpcTimeoutException(message: String, cause: TimeoutException)
-  extends TimeoutException(message) { initCause(cause) }
-
-
-/**
- * Associates a timeout with a description so that a when a TimeoutException occurs, additional
- * context about the timeout can be amended to the exception message.
- * @param duration timeout duration in seconds
- * @param timeoutProp the configuration property that controls this timeout
- */
-private[spark] class RpcTimeout(val duration: FiniteDuration, val timeoutProp: String)
-  extends Serializable {
-
-  /** Amends the standard message of TimeoutException to include the description */
-  private def createRpcTimeoutException(te: TimeoutException): RpcTimeoutException = {
-    new RpcTimeoutException(te.getMessage() + ". This timeout is controlled by " + timeoutProp, te)
-  }
-
-  /**
-   * PartialFunction to match a TimeoutException and add the timeout description to the message
-   *
-   * @note This can be used in the recover callback of a Future to add to a TimeoutException
-   * Example:
-   *    val timeout = new RpcTimeout(5 millis, "short timeout")
-   *    Future(throw new TimeoutException).recover(timeout.addMessageIfTimeout)
-   */
-  def addMessageIfTimeout[T]: PartialFunction[Throwable, T] = {
-    // The exception has already been converted to a RpcTimeoutException so just raise it
-    case rte: RpcTimeoutException => throw rte
-    // Any other TimeoutException get converted to a RpcTimeoutException with modified message
-    case te: TimeoutException => throw createRpcTimeoutException(te)
-  }
-
-  /**
-   * Wait for the completed result and return it. If the result is not available within this
-   * timeout, throw a [[RpcTimeoutException]] to indicate which configuration controls the timeout.
-   * @param  awaitable  the `Awaitable` to be awaited
-   * @throws RpcTimeoutException if after waiting for the specified time `awaitable`
-   *         is still not ready
-   */
-  def awaitResult[T](awaitable: Awaitable[T]): T = {
-    try {
-      Await.result(awaitable, duration)
-    } catch addMessageIfTimeout
-  }
-}
-
-
-private[spark] object RpcTimeout {
-
-  /**
-   * Lookup the timeout property in the configuration and create
-   * a RpcTimeout with the property key in the description.
-   * @param conf configuration properties containing the timeout
-   * @param timeoutProp property key for the timeout in seconds
-   * @throws NoSuchElementException if property is not set
-   */
-  def apply(conf: SparkConf, timeoutProp: String): RpcTimeout = {
-    val timeout = { conf.getTimeAsSeconds(timeoutProp) seconds }
-    new RpcTimeout(timeout, timeoutProp)
-  }
-
-  /**
-   * Lookup the timeout property in the configuration and create
-   * a RpcTimeout with the property key in the description.
-   * Uses the given default value if property is not set
-   * @param conf configuration properties containing the timeout
-   * @param timeoutProp property key for the timeout in seconds
-   * @param defaultValue default timeout value in seconds if property not found
-   */
-  def apply(conf: SparkConf, timeoutProp: String, defaultValue: String): RpcTimeout = {
-    val timeout = { conf.getTimeAsSeconds(timeoutProp, defaultValue) seconds }
-    new RpcTimeout(timeout, timeoutProp)
-  }
-
-  /**
-   * Lookup prioritized list of timeout properties in the configuration
-   * and create a RpcTimeout with the first set property key in the
-   * description.
-   * Uses the given default value if property is not set
-   * @param conf configuration properties containing the timeout
-   * @param timeoutPropList prioritized list of property keys for the timeout in seconds
-   * @param defaultValue default timeout value in seconds if no properties found
-   */
-  def apply(conf: SparkConf, timeoutPropList: Seq[String], defaultValue: String): RpcTimeout = {
-    require(timeoutPropList.nonEmpty)
-
-    // Find the first set property or use the default value with the first property
-    val itr = timeoutPropList.iterator
-    var foundProp: Option[(String, String)] = None
-    while (itr.hasNext && foundProp.isEmpty){
-      val propKey = itr.next()
-      conf.getOption(propKey).foreach { prop => foundProp = Some(propKey, prop) }
-    }
-    val finalProp = foundProp.getOrElse(timeoutPropList.head, defaultValue)
-    val timeout = { Utils.timeStringAsSeconds(finalProp._2) seconds }
-    new RpcTimeout(timeout, finalProp._1)
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcTimeout.scala b/core/src/main/scala/org/apache/spark/rpc/RpcTimeout.scala
new file mode 100644
index 000000000000..285786ebf9f1
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcTimeout.scala
@@ -0,0 +1,131 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc
+
+import java.util.concurrent.TimeoutException
+
+import scala.concurrent.{Awaitable, Await}
+import scala.concurrent.duration._
+
+import org.apache.spark.SparkConf
+import org.apache.spark.util.Utils
+
+
+/**
+ * An exception thrown if RpcTimeout modifies a [[TimeoutException]].
+ */
+private[rpc] class RpcTimeoutException(message: String, cause: TimeoutException)
+  extends TimeoutException(message) { initCause(cause) }
+
+
+/**
+ * Associates a timeout with a description so that a when a TimeoutException occurs, additional
+ * context about the timeout can be amended to the exception message.
+ *
+ * @param duration timeout duration in seconds
+ * @param timeoutProp the configuration property that controls this timeout
+ */
+private[spark] class RpcTimeout(val duration: FiniteDuration, val timeoutProp: String)
+  extends Serializable {
+
+  /** Amends the standard message of TimeoutException to include the description */
+  private def createRpcTimeoutException(te: TimeoutException): RpcTimeoutException = {
+    new RpcTimeoutException(te.getMessage + ". This timeout is controlled by " + timeoutProp, te)
+  }
+
+  /**
+   * PartialFunction to match a TimeoutException and add the timeout description to the message
+   *
+   * @note This can be used in the recover callback of a Future to add to a TimeoutException
+   * Example:
+   *    val timeout = new RpcTimeout(5 millis, "short timeout")
+   *    Future(throw new TimeoutException).recover(timeout.addMessageIfTimeout)
+   */
+  def addMessageIfTimeout[T]: PartialFunction[Throwable, T] = {
+    // The exception has already been converted to a RpcTimeoutException so just raise it
+    case rte: RpcTimeoutException => throw rte
+    // Any other TimeoutException get converted to a RpcTimeoutException with modified message
+    case te: TimeoutException => throw createRpcTimeoutException(te)
+  }
+
+  /**
+   * Wait for the completed result and return it. If the result is not available within this
+   * timeout, throw a [[RpcTimeoutException]] to indicate which configuration controls the timeout.
+   * @param  awaitable  the `Awaitable` to be awaited
+   * @throws RpcTimeoutException if after waiting for the specified time `awaitable`
+   *         is still not ready
+   */
+  def awaitResult[T](awaitable: Awaitable[T]): T = {
+    try {
+      Await.result(awaitable, duration)
+    } catch addMessageIfTimeout
+  }
+}
+
+
+private[spark] object RpcTimeout {
+
+  /**
+   * Lookup the timeout property in the configuration and create
+   * a RpcTimeout with the property key in the description.
+   * @param conf configuration properties containing the timeout
+   * @param timeoutProp property key for the timeout in seconds
+   * @throws NoSuchElementException if property is not set
+   */
+  def apply(conf: SparkConf, timeoutProp: String): RpcTimeout = {
+    val timeout = { conf.getTimeAsSeconds(timeoutProp).seconds }
+    new RpcTimeout(timeout, timeoutProp)
+  }
+
+  /**
+   * Lookup the timeout property in the configuration and create
+   * a RpcTimeout with the property key in the description.
+   * Uses the given default value if property is not set
+   * @param conf configuration properties containing the timeout
+   * @param timeoutProp property key for the timeout in seconds
+   * @param defaultValue default timeout value in seconds if property not found
+   */
+  def apply(conf: SparkConf, timeoutProp: String, defaultValue: String): RpcTimeout = {
+    val timeout = { conf.getTimeAsSeconds(timeoutProp, defaultValue).seconds }
+    new RpcTimeout(timeout, timeoutProp)
+  }
+
+  /**
+   * Lookup prioritized list of timeout properties in the configuration
+   * and create a RpcTimeout with the first set property key in the
+   * description.
+   * Uses the given default value if property is not set
+   * @param conf configuration properties containing the timeout
+   * @param timeoutPropList prioritized list of property keys for the timeout in seconds
+   * @param defaultValue default timeout value in seconds if no properties found
+   */
+  def apply(conf: SparkConf, timeoutPropList: Seq[String], defaultValue: String): RpcTimeout = {
+    require(timeoutPropList.nonEmpty)
+
+    // Find the first set property or use the default value with the first property
+    val itr = timeoutPropList.iterator
+    var foundProp: Option[(String, String)] = None
+    while (itr.hasNext && foundProp.isEmpty){
+      val propKey = itr.next()
+      conf.getOption(propKey).foreach { prop => foundProp = Some(propKey, prop) }
+    }
+    val finalProp = foundProp.getOrElse(timeoutPropList.head, defaultValue)
+    val timeout = { Utils.timeStringAsSeconds(finalProp._2).seconds }
+    new RpcTimeout(timeout, finalProp._1)
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index 95132a4e4a0b..3fad595a0d0b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -39,10 +39,6 @@ import org.apache.spark.util.{ActorLogReceive, AkkaUtils, ThreadUtils}
  *
  * TODO Once we remove all usages of Akka in other place, we can move this file to a new project and
  * remove Akka from the dependencies.
- *
- * @param actorSystem
- * @param conf
- * @param boundPort
  */
 private[spark] class AkkaRpcEnv private[akka] (
     val actorSystem: ActorSystem, conf: SparkConf, boundPort: Int)
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
index d71e6f01dbb2..398e9eafc144 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.rpc.netty
 
-import java.util.concurrent.{ConcurrentHashMap, LinkedBlockingQueue, TimeUnit}
+import java.util.concurrent.{ThreadPoolExecutor, ConcurrentHashMap, LinkedBlockingQueue, TimeUnit}
 import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.JavaConverters._
@@ -38,12 +38,16 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     val inbox = new Inbox(ref, endpoint)
   }
 
-  private val endpoints = new ConcurrentHashMap[String, EndpointData]()
-  private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]()
+  private val endpoints = new ConcurrentHashMap[String, EndpointData]
+  private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]
 
   // Track the receivers whose inboxes may contain messages.
   private val receivers = new LinkedBlockingQueue[EndpointData]()
 
+  /**
+   * True if the dispatcher has been stopped. Once stopped, all messages posted will be bounced
+   * immediately.
+   */
   @GuardedBy("this")
   private var stopped = false
 
@@ -59,7 +63,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
       }
       val data = endpoints.get(name)
       endpointRefs.put(data.endpoint, data.ref)
-      receivers.put(data)
+      receivers.put(data)  // for the OnStart message
     }
     endpointRef
   }
@@ -73,7 +77,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     val data = endpoints.remove(name)
     if (data != null) {
       data.inbox.stop()
-      receivers.put(data)
+      receivers.put(data)  // for the OnStop message
     }
     // Don't clean `endpointRefs` here because it's possible that some messages are being processed
     // now and they can use `getRpcEndpointRef`. So `endpointRefs` will be cleaned in Inbox via
@@ -91,19 +95,23 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
   }
 
   /**
-   * Send a message to all registered [[RpcEndpoint]]s.
-   * @param message
+   * Send a message to all registered [[RpcEndpoint]]s in this process.
+   *
+   * This can be used to make network events known to all end points (e.g. "a new node connected").
    */
-  def broadcastMessage(message: InboxMessage): Unit = {
+  def postToAll(message: InboxMessage): Unit = {
     val iter = endpoints.keySet().iterator()
     while (iter.hasNext) {
       val name = iter.next
-      postMessageToInbox(name, (_) => message,
-        () => { logWarning(s"Drop ${message} because ${name} has been stopped") })
+      postMessage(
+        name,
+        _ => message,
+        () => { logWarning(s"Drop $message because $name has been stopped") })
     }
   }
 
-  def postMessage(message: RequestMessage, callback: RpcResponseCallback): Unit = {
+  /** Posts a message sent by a remote endpoint. */
+  def postRemoteMessage(message: RequestMessage, callback: RpcResponseCallback): Unit = {
     def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
       val rpcCallContext =
         new RemoteNettyRpcCallContext(
@@ -116,10 +124,11 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
         new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
     }
 
-    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+    postMessage(message.receiver.name, createMessage, onEndpointStopped)
   }
 
-  def postMessage(message: RequestMessage, p: Promise[Any]): Unit = {
+  /** Posts a message sent by a local endpoint. */
+  def postLocalMessage(message: RequestMessage, p: Promise[Any]): Unit = {
     def createMessage(sender: NettyRpcEndpointRef): InboxMessage = {
       val rpcCallContext =
         new LocalNettyRpcCallContext(sender, message.senderAddress, message.needReply, p)
@@ -131,39 +140,36 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
         new SparkException(s"Could not find ${message.receiver.name} or it has been stopped"))
     }
 
-    postMessageToInbox(message.receiver.name, createMessage, onEndpointStopped)
+    postMessage(message.receiver.name, createMessage, onEndpointStopped)
   }
 
-  private def postMessageToInbox(
+  /**
+   * Posts a message to a specific endpoint.
+   *
+   * @param endpointName name of the endpoint.
+   * @param createMessageFn function to create the message.
+   * @param callbackIfStopped callback function if the endpoint is stopped.
+   */
+  private def postMessage(
       endpointName: String,
       createMessageFn: NettyRpcEndpointRef => InboxMessage,
-      onStopped: () => Unit): Unit = {
-    val shouldCallOnStop =
-      synchronized {
-        val data = endpoints.get(endpointName)
-        if (stopped || data == null) {
-          true
-        } else {
-          data.inbox.post(createMessageFn(data.ref))
-          receivers.put(data)
-          false
-        }
+      callbackIfStopped: () => Unit): Unit = {
+    val shouldCallOnStop = synchronized {
+      val data = endpoints.get(endpointName)
+      if (stopped || data == null) {
+        true
+      } else {
+        data.inbox.post(createMessageFn(data.ref))
+        receivers.put(data)
+        false
       }
+    }
     if (shouldCallOnStop) {
       // We don't need to call `onStop` in the `synchronized` block
-      onStopped()
+      callbackIfStopped()
     }
   }
 
-  private val parallelism = nettyEnv.conf.getInt("spark.rpc.netty.dispatcher.parallelism",
-    Runtime.getRuntime.availableProcessors())
-
-  private val executor = ThreadUtils.newDaemonFixedThreadPool(parallelism, "dispatcher-event-loop")
-
-  (0 until parallelism) foreach { _ =>
-    executor.execute(new MessageLoop)
-  }
-
   def stop(): Unit = {
     synchronized {
       if (stopped) {
@@ -174,12 +180,12 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     // Stop all endpoints. This will queue all endpoints for processing by the message loops.
     endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
     // Enqueue a message that tells the message loops to stop.
-    receivers.put(PoisonEndpoint)
-    executor.shutdown()
+    receivers.put(PoisonPill)
+    threadpool.shutdown()
   }
 
   def awaitTermination(): Unit = {
-    executor.awaitTermination(Long.MaxValue, TimeUnit.MILLISECONDS)
+    threadpool.awaitTermination(Long.MaxValue, TimeUnit.MILLISECONDS)
   }
 
   /**
@@ -189,15 +195,27 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     endpoints.containsKey(name)
   }
 
+  /** Thread pool used for dispatching messages. */
+  private val threadpool: ThreadPoolExecutor = {
+    val numThreads = nettyEnv.conf.getInt("spark.rpc.netty.dispatcher.numThreads",
+      Runtime.getRuntime.availableProcessors())
+    val pool = ThreadUtils.newDaemonFixedThreadPool(numThreads, "dispatcher-event-loop")
+    for (i <- 0 until numThreads) {
+      pool.execute(new MessageLoop)
+    }
+    pool
+  }
+
+  /** Message loop used for dispatching messages. */
   private class MessageLoop extends Runnable {
     override def run(): Unit = {
       try {
         while (true) {
           try {
             val data = receivers.take()
-            if (data == PoisonEndpoint) {
-              // Put PoisonEndpoint back so that other MessageLoops can see it.
-              receivers.put(PoisonEndpoint)
+            if (data == PoisonPill) {
+              // Put PoisonPill back so that other MessageLoops can see it.
+              receivers.put(PoisonPill)
               return
             }
             data.inbox.process(Dispatcher.this)
@@ -211,8 +229,6 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     }
   }
 
-  /**
-   * A poison endpoint that indicates MessageLoop should exit its loop.
-   */
-  private val PoisonEndpoint = new EndpointData(null, null, null)
+  /** A poison endpoint that indicates MessageLoop should exit its message loop. */
+  private val PoisonPill = new EndpointData(null, null, null)
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
index 6061c9b8de94..fa9a3eb99b02 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
@@ -26,8 +26,8 @@ private[netty] case class ID(name: String)
 /**
  * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if a [[RpcEndpoint]] exists in this [[RpcEnv]]
  */
-private[netty] class IDVerifier(
-    override val rpcEnv: RpcEnv, dispatcher: Dispatcher) extends RpcEndpoint {
+private[netty] class IDVerifier(override val rpcEnv: RpcEnv, dispatcher: Dispatcher)
+  extends RpcEndpoint {
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
     case ID(name) => context.reply(dispatcher.verify(name))
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
index b669f59a2884..c72b588db57f 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
@@ -17,14 +17,16 @@
 
 package org.apache.spark.rpc.netty
 
-import java.util.LinkedList
 import javax.annotation.concurrent.GuardedBy
 
 import scala.util.control.NonFatal
 
+import com.google.common.annotations.VisibleForTesting
+
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.rpc.{RpcAddress, RpcEndpoint, ThreadSafeRpcEndpoint}
 
+
 private[netty] sealed trait InboxMessage
 
 private[netty] case class ContentMessage(
@@ -37,44 +39,40 @@ private[netty] case object OnStart extends InboxMessage
 
 private[netty] case object OnStop extends InboxMessage
 
-/**
- * A broadcast message that indicates connecting to a remote node.
- */
-private[netty] case class Associated(remoteAddress: RpcAddress) extends InboxMessage
+/** A message to tell all endpoints that a remote process has connected. */
+private[netty] case class RemoteProcessConnected(remoteAddress: RpcAddress) extends InboxMessage
 
-/**
- * A broadcast message that indicates a remote connection is lost.
- */
-private[netty] case class Disassociated(remoteAddress: RpcAddress) extends InboxMessage
+/** A message to tell all endpoints that a remote process has disconnected. */
+private[netty] case class RemoteProcessDisconnected(remoteAddress: RpcAddress) extends InboxMessage
 
-/**
- * A broadcast message that indicates a network error
- */
-private[netty] case class AssociationError(cause: Throwable, remoteAddress: RpcAddress)
+/** A message to tell all endpoints that a network error has happened. */
+private[netty] case class RemoteProcessConnectionError(cause: Throwable, remoteAddress: RpcAddress)
   extends InboxMessage
 
 /**
  * A inbox that stores messages for an [[RpcEndpoint]] and posts messages to it thread-safely.
- * @param endpointRef
- * @param endpoint
  */
 private[netty] class Inbox(
     val endpointRef: NettyRpcEndpointRef,
-    val endpoint: RpcEndpoint) extends Logging {
+    val endpoint: RpcEndpoint)
+  extends Logging {
 
-  inbox =>
+  inbox =>  // Give this an alias so we can use it more clearly in closures.
 
   @GuardedBy("this")
-  protected val messages = new LinkedList[InboxMessage]()
+  protected val messages = new java.util.LinkedList[InboxMessage]()
 
+  /** True if the inbox (and its associated endpoint) is stopped. */
   @GuardedBy("this")
   private var stopped = false
 
+  /** Allow multiple threads to process messages at the same time. */
   @GuardedBy("this")
   private var enableConcurrent = false
 
+  /** The number of threads processing messages for this inbox. */
   @GuardedBy("this")
-  private var workerCount = 0
+  private var numActiveThreads = 0
 
   // OnStart should be the first message to process
   inbox.synchronized {
@@ -87,12 +85,12 @@ private[netty] class Inbox(
   def process(dispatcher: Dispatcher): Unit = {
     var message: InboxMessage = null
     inbox.synchronized {
-      if (!enableConcurrent && workerCount != 0) {
+      if (!enableConcurrent && numActiveThreads != 0) {
         return
       }
       message = messages.poll()
       if (message != null) {
-        workerCount += 1
+        numActiveThreads += 1
       } else {
         return
       }
@@ -101,15 +99,11 @@ private[netty] class Inbox(
       safelyCall(endpoint) {
         message match {
           case ContentMessage(_sender, content, needReply, context) =>
-            val pf: PartialFunction[Any, Unit] =
-              if (needReply) {
-                endpoint.receiveAndReply(context)
-              } else {
-                endpoint.receive
-              }
+            // The partial function to call
+            val pf = if (needReply) endpoint.receiveAndReply(context) else endpoint.receive
             try {
               pf.applyOrElse[Any, Unit](content, { msg =>
-                throw new SparkException(s"Unmatched message $message from ${_sender}")
+                throw new SparkException(s"Unsupported message $message from ${_sender}")
               })
               if (!needReply) {
                 context.finish()
@@ -121,11 +115,13 @@ private[netty] class Inbox(
                   context.sendFailure(e)
                 } else {
                   context.finish()
-                  throw e
                 }
+                // Throw the exception -- this exception will be caught by the safelyCall function.
+                // The endpoint's onError function will be called.
+                throw e
             }
 
-          case OnStart => {
+          case OnStart =>
             endpoint.onStart()
             if (!endpoint.isInstanceOf[ThreadSafeRpcEndpoint]) {
               inbox.synchronized {
@@ -134,24 +130,22 @@ private[netty] class Inbox(
                 }
               }
             }
-          }
 
           case OnStop =>
-            val _workCount = inbox.synchronized {
-              workerCount
-            }
-            assert(_workCount == 1, s"There should be only one worker but was ${_workCount}")
+            val activeThreads = inbox.synchronized { inbox.numActiveThreads }
+            assert(activeThreads == 1,
+              s"There should be only a single active thread but found $activeThreads threads.")
             dispatcher.removeRpcEndpointRef(endpoint)
             endpoint.onStop()
             assert(isEmpty, "OnStop should be the last message")
 
-          case Associated(remoteAddress) =>
+          case RemoteProcessConnected(remoteAddress) =>
             endpoint.onConnected(remoteAddress)
 
-          case Disassociated(remoteAddress) =>
+          case RemoteProcessDisconnected(remoteAddress) =>
             endpoint.onDisconnected(remoteAddress)
 
-          case AssociationError(cause, remoteAddress) =>
+          case RemoteProcessConnectionError(cause, remoteAddress) =>
             endpoint.onNetworkError(cause, remoteAddress)
         }
       }
@@ -159,33 +153,27 @@ private[netty] class Inbox(
       inbox.synchronized {
         // "enableConcurrent" will be set to false after `onStop` is called, so we should check it
         // every time.
-        if (!enableConcurrent && workerCount != 1) {
+        if (!enableConcurrent && numActiveThreads != 1) {
           // If we are not the only one worker, exit
-          workerCount -= 1
+          numActiveThreads -= 1
           return
         }
         message = messages.poll()
         if (message == null) {
-          workerCount -= 1
+          numActiveThreads -= 1
           return
         }
       }
     }
   }
 
-  def post(message: InboxMessage): Unit = {
-    val dropped =
-      inbox.synchronized {
-        if (stopped) {
-          // We already put "OnStop" into "messages", so we should drop further messages
-          true
-        } else {
-          messages.add(message)
-          false
-        }
-      }
-    if (dropped) {
+  def post(message: InboxMessage): Unit = inbox.synchronized {
+    if (stopped) {
+      // We already put "OnStop" into "messages", so we should drop further messages
       onDrop(message)
+    } else {
+      messages.add(message)
+      false
     }
   }
 
@@ -203,24 +191,23 @@ private[netty] class Inbox(
     }
   }
 
-  // Visible for testing.
+  def isEmpty: Boolean = inbox.synchronized { messages.isEmpty }
+
+  /** Called when we are dropping a message. Test cases override this to test message dropping. */
+  @VisibleForTesting
   protected def onDrop(message: InboxMessage): Unit = {
-    logWarning(s"Drop ${message} because $endpointRef is stopped")
+    logWarning(s"Drop $message because $endpointRef is stopped")
   }
 
-  def isEmpty: Boolean = inbox.synchronized { messages.isEmpty }
-
+  /**
+   * Calls action closure, and calls the endpoint's onError function in the case of exceptions.
+   */
   private def safelyCall(endpoint: RpcEndpoint)(action: => Unit): Unit = {
-    try {
-      action
-    } catch {
-      case NonFatal(e) => {
-        try {
-          endpoint.onError(e)
-        } catch {
-          case NonFatal(e) => logWarning(s"Ignore error", e)
+    try action catch {
+      case NonFatal(e) =>
+        try endpoint.onError(e) catch {
+          case NonFatal(ee) => logError(s"Ignoring error", ee)
         }
-      }
     }
   }
 
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
index 75dcc02a0c5a..21d5bb4923d1 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
@@ -26,7 +26,8 @@ import org.apache.spark.rpc.{RpcAddress, RpcCallContext}
 private[netty] abstract class NettyRpcCallContext(
     endpointRef: NettyRpcEndpointRef,
     override val senderAddress: RpcAddress,
-    needReply: Boolean) extends RpcCallContext with Logging {
+    needReply: Boolean)
+  extends RpcCallContext with Logging {
 
   protected def send(message: Any): Unit
 
@@ -35,7 +36,7 @@ private[netty] abstract class NettyRpcCallContext(
       send(AskResponse(endpointRef, response))
     } else {
       throw new IllegalStateException(
-        s"Cannot send $response to the sender because the sender won't handle it")
+        s"Cannot send $response to the sender because the sender does not expect a reply")
     }
   }
 
@@ -63,7 +64,8 @@ private[netty] class LocalNettyRpcCallContext(
     endpointRef: NettyRpcEndpointRef,
     senderAddress: RpcAddress,
     needReply: Boolean,
-    p: Promise[Any]) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+    p: Promise[Any])
+  extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
 
   override protected def send(message: Any): Unit = {
     p.success(message)
@@ -78,7 +80,8 @@ private[netty] class RemoteNettyRpcCallContext(
     endpointRef: NettyRpcEndpointRef,
     callback: RpcResponseCallback,
     senderAddress: RpcAddress,
-    needReply: Boolean) extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
+    needReply: Boolean)
+  extends NettyRpcCallContext(endpointRef, senderAddress, needReply) {
 
   override protected def send(message: Any): Unit = {
     val reply = nettyEnv.serialize(message)
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 5522b40782d9..89b6df76c270 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -19,7 +19,6 @@ package org.apache.spark.rpc.netty
 import java.io._
 import java.net.{InetSocketAddress, URI}
 import java.nio.ByteBuffer
-import java.util.Arrays
 import java.util.concurrent._
 import javax.annotation.concurrent.GuardedBy
 
@@ -77,19 +76,19 @@ private[netty] class NettyRpcEnv(
   @volatile private var server: TransportServer = _
 
   def start(port: Int): Unit = {
-    val bootstraps: Seq[TransportServerBootstrap] =
+    val bootstraps: java.util.List[TransportServerBootstrap] =
       if (securityManager.isAuthenticationEnabled()) {
-        Seq(new SaslServerBootstrap(transportConf, securityManager))
+        java.util.Arrays.asList(new SaslServerBootstrap(transportConf, securityManager))
       } else {
-        Nil
+        java.util.Collections.emptyList()
       }
-    server = transportContext.createServer(port, bootstraps.asJava)
+    server = transportContext.createServer(port, bootstraps)
     dispatcher.registerRpcEndpoint(IDVerifier.NAME, new IDVerifier(this, dispatcher))
   }
 
   override lazy val address: RpcAddress = {
     require(server != null, "NettyRpcEnv has not yet started")
-    RpcAddress(host, server.getPort())
+    RpcAddress(host, server.getPort)
   }
 
   override def setupEndpoint(name: String, endpoint: RpcEndpoint): RpcEndpointRef = {
@@ -119,7 +118,7 @@ private[netty] class NettyRpcEnv(
     val remoteAddr = message.receiver.address
     if (remoteAddr == address) {
       val promise = Promise[Any]()
-      dispatcher.postMessage(message, promise)
+      dispatcher.postLocalMessage(message, promise)
       promise.future.onComplete {
         case Success(response) =>
           val ack = response.asInstanceOf[Ack]
@@ -148,10 +147,9 @@ private[netty] class NettyRpcEnv(
           }
         })
       } catch {
-        case e: RejectedExecutionException => {
+        case e: RejectedExecutionException =>
           // `send` after shutting clientConnectionExecutor down, ignore it
-          logWarning(s"Cannot send ${message} because RpcEnv is stopped")
-        }
+          logWarning(s"Cannot send $message because RpcEnv is stopped")
       }
     }
   }
@@ -161,7 +159,7 @@ private[netty] class NettyRpcEnv(
     val remoteAddr = message.receiver.address
     if (remoteAddr == address) {
       val p = Promise[Any]()
-      dispatcher.postMessage(message, p)
+      dispatcher.postLocalMessage(message, p)
       p.future.onComplete {
         case Success(response) =>
           val reply = response.asInstanceOf[AskResponse]
@@ -218,7 +216,7 @@ private[netty] class NettyRpcEnv(
 
   private[netty] def serialize(content: Any): Array[Byte] = {
     val buffer = javaSerializerInstance.serialize(content)
-    Arrays.copyOfRange(
+    java.util.Arrays.copyOfRange(
       buffer.array(), buffer.arrayOffset + buffer.position, buffer.arrayOffset + buffer.limit)
   }
 
@@ -425,7 +423,7 @@ private[netty] class NettyRpcHandler(
     assert(addr != null)
     val remoteEnvAddress = requestMessage.senderAddress
     val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-    val broadcastMessage =
+    val broadcastMessage: Option[RemoteProcessConnected] =
       synchronized {
         // If the first connection to a remote RpcEnv is found, we should broadcast "Associated"
         if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
@@ -435,7 +433,7 @@ private[netty] class NettyRpcHandler(
           remoteConnectionCount.put(remoteEnvAddress, count + 1)
           if (count == 0) {
             // This is the first connection, so fire "Associated"
-            Some(Associated(remoteEnvAddress))
+            Some(RemoteProcessConnected(remoteEnvAddress))
           } else {
             None
           }
@@ -443,8 +441,8 @@ private[netty] class NettyRpcHandler(
           None
         }
       }
-    broadcastMessage.foreach(dispatcher.broadcastMessage)
-    dispatcher.postMessage(requestMessage, callback)
+    broadcastMessage.foreach(dispatcher.postToAll)
+    dispatcher.postRemoteMessage(requestMessage, callback)
   }
 
   override def getStreamManager: StreamManager = new OneForOneStreamManager
@@ -455,12 +453,12 @@ private[netty] class NettyRpcHandler(
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
       val broadcastMessage =
         synchronized {
-          remoteAddresses.get(clientAddr).map(AssociationError(cause, _))
+          remoteAddresses.get(clientAddr).map(RemoteProcessConnectionError(cause, _))
         }
       if (broadcastMessage.isEmpty) {
         logError(cause.getMessage, cause)
       } else {
-        dispatcher.broadcastMessage(broadcastMessage.get)
+        dispatcher.postToAll(broadcastMessage.get)
       }
     } else {
       // If the channel is closed before connecting, its remoteAddress will be null.
@@ -485,7 +483,7 @@ private[netty] class NettyRpcHandler(
             if (count - 1 == 0) {
               // We lost all clients, so clean up and fire "Disassociated"
               remoteConnectionCount.remove(remoteEnvAddress)
-              Some(Disassociated(remoteEnvAddress))
+              Some(RemoteProcessDisconnected(remoteEnvAddress))
             } else {
               // Decrease the connection number of remoteEnvAddress
               remoteConnectionCount.put(remoteEnvAddress, count - 1)
@@ -493,7 +491,7 @@ private[netty] class NettyRpcHandler(
             }
           }
         }
-      broadcastMessage.foreach(dispatcher.broadcastMessage)
+      broadcastMessage.foreach(dispatcher.postToAll)
     } else {
       // If the channel is closed before connecting, its remoteAddress will be null. In this case,
       // we can ignore it since we don't fire "Associated".
diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index 1ed098379e29..15e7519d708c 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-
 package org.apache.spark.util
 
 import java.util.concurrent._
diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index e60c1b355a73..bd7e51c3b510 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -1895,6 +1895,7 @@ private[spark] object Utils extends Logging {
    *                     This is expected to throw java.net.BindException on port collision.
    * @param conf A SparkConf used to get the maximum number of retries when binding to a port.
    * @param serviceName Name of the service.
+   * @return (service: T, port: Int)
    */
   def startServiceOnPort[T](
       startPort: Int,
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
index 120cf1b6fa9d..276c077b3d13 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/InboxSuite.scala
@@ -113,7 +113,7 @@ class InboxSuite extends SparkFunSuite {
     val remoteAddress = RpcAddress("localhost", 11111)
 
     val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(Associated(remoteAddress))
+    inbox.post(RemoteProcessConnected(remoteAddress))
     inbox.process(dispatcher)
 
     endpoint.verifySingleOnConnectedMessage(remoteAddress)
@@ -127,7 +127,7 @@ class InboxSuite extends SparkFunSuite {
     val remoteAddress = RpcAddress("localhost", 11111)
 
     val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(Disassociated(remoteAddress))
+    inbox.post(RemoteProcessDisconnected(remoteAddress))
     inbox.process(dispatcher)
 
     endpoint.verifySingleOnDisconnectedMessage(remoteAddress)
@@ -142,7 +142,7 @@ class InboxSuite extends SparkFunSuite {
     val cause = new RuntimeException("Oops")
 
     val inbox = new Inbox(endpointRef, endpoint)
-    inbox.post(AssociationError(cause, remoteAddress))
+    inbox.post(RemoteProcessConnectionError(cause, remoteAddress))
     inbox.process(dispatcher)
 
     endpoint.verifySingleOnNetworkErrorMessage(cause, remoteAddress)
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
index 06ca035d199e..f24f78b8c454 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -45,7 +45,7 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
     when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40001))
     nettyRpcHandler.receive(client, null, null)
 
-    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 12345)))
   }
 
   test("connectionTerminated") {
@@ -60,8 +60,9 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
     when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
     nettyRpcHandler.connectionTerminated(client)
 
-    verify(dispatcher, times(1)).broadcastMessage(Associated(RpcAddress("localhost", 12345)))
-    verify(dispatcher, times(1)).broadcastMessage(Disassociated(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).postToAll(
+      RemoteProcessDisconnected(RpcAddress("localhost", 12345)))
   }
 
 }

From d0cc79ccd0b4500bd6b18184a723dabc164e8abd Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 13 Oct 2015 09:57:53 -0700
Subject: [PATCH 217/896] [SPARK-11030] [SQL] share the SQLTab across sessions

The SQLTab will be shared by multiple sessions.

If we create multiple independent SQLContexts (not using newSession()), will still see multiple SQLTabs in the Spark UI.

Author: Davies Liu <davies@databricks.com>

Closes #9048 from davies/sqlui.
---
 .../org/apache/spark/sql/SQLContext.scala     | 23 +++++++++++++------
 .../spark/sql/execution/ui/SQLListener.scala  | 10 +++-----
 .../spark/sql/execution/ui/SQLTab.scala       |  4 +---
 .../sql/execution/ui/SQLListenerSuite.scala   |  8 +++----
 .../apache/spark/sql/hive/HiveContext.scala   | 12 +++++++---
 5 files changed, 33 insertions(+), 24 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 1bd291389241..cd937257d31a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -65,12 +65,15 @@ import org.apache.spark.util.Utils
 class SQLContext private[sql](
     @transient val sparkContext: SparkContext,
     @transient protected[sql] val cacheManager: CacheManager,
+    @transient private[sql] val listener: SQLListener,
     val isRootContext: Boolean)
   extends org.apache.spark.Logging with Serializable {
 
   self =>
 
-  def this(sparkContext: SparkContext) = this(sparkContext, new CacheManager, true)
+  def this(sparkContext: SparkContext) = {
+    this(sparkContext, new CacheManager, SQLContext.createListenerAndUI(sparkContext), true)
+  }
   def this(sparkContext: JavaSparkContext) = this(sparkContext.sc)
 
   // If spark.sql.allowMultipleContexts is true, we will throw an exception if a user
@@ -97,7 +100,7 @@ class SQLContext private[sql](
 
   /**
    * Returns a SQLContext as new session, with separated SQL configurations, temporary tables,
-   * registered functions, but sharing the same SparkContext and CacheManager.
+   * registered functions, but sharing the same SparkContext, CacheManager, SQLListener and SQLTab.
    *
    * @since 1.6.0
    */
@@ -105,6 +108,7 @@ class SQLContext private[sql](
     new SQLContext(
       sparkContext = sparkContext,
       cacheManager = cacheManager,
+      listener = listener,
       isRootContext = false)
   }
 
@@ -113,11 +117,6 @@ class SQLContext private[sql](
    */
   protected[sql] lazy val conf = new SQLConf
 
-  // `listener` should be only used in the driver
-  @transient private[sql] val listener = new SQLListener(this)
-  sparkContext.addSparkListener(listener)
-  sparkContext.ui.foreach(new SQLTab(this, _))
-
   /**
    * Set Spark SQL configuration properties.
    *
@@ -1312,4 +1311,14 @@ object SQLContext {
       ): InternalRow
     }
   }
+
+  /**
+   * Create a SQLListener then add it into SparkContext, and create an SQLTab if there is SparkUI.
+   */
+  private[sql] def createListenerAndUI(sc: SparkContext): SQLListener = {
+    val listener = new SQLListener(sc.conf)
+    sc.addSparkListener(listener)
+    sc.ui.foreach(new SQLTab(listener, _))
+    listener
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
index 5779c71f64e9..d6472400a6a2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
@@ -19,19 +19,15 @@ package org.apache.spark.sql.execution.ui
 
 import scala.collection.mutable
 
-import com.google.common.annotations.VisibleForTesting
-
-import org.apache.spark.{JobExecutionStatus, Logging}
 import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.scheduler._
-import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.execution.SQLExecution
 import org.apache.spark.sql.execution.metric.{SQLMetricParam, SQLMetricValue}
+import org.apache.spark.{JobExecutionStatus, Logging, SparkConf}
 
-private[sql] class SQLListener(sqlContext: SQLContext) extends SparkListener with Logging {
+private[sql] class SQLListener(conf: SparkConf) extends SparkListener with Logging {
 
-  private val retainedExecutions =
-    sqlContext.sparkContext.conf.getInt("spark.sql.ui.retainedExecutions", 1000)
+  private val retainedExecutions = conf.getInt("spark.sql.ui.retainedExecutions", 1000)
 
   private val activeExecutions = mutable.HashMap[Long, SQLExecutionUIData]()
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLTab.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLTab.scala
index 0b0867f67eb6..9c27944d42fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLTab.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLTab.scala
@@ -20,14 +20,12 @@ package org.apache.spark.sql.execution.ui
 import java.util.concurrent.atomic.AtomicInteger
 
 import org.apache.spark.Logging
-import org.apache.spark.sql.SQLContext
 import org.apache.spark.ui.{SparkUI, SparkUITab}
 
-private[sql] class SQLTab(sqlContext: SQLContext, sparkUI: SparkUI)
+private[sql] class SQLTab(val listener: SQLListener, sparkUI: SparkUI)
   extends SparkUITab(sparkUI, SQLTab.nextTabName) with Logging {
 
   val parent = sparkUI
-  val listener = sqlContext.listener
 
   attachPage(new AllExecutionsPage(this))
   attachPage(new ExecutionPage(this))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
index 7a46c69a056b..727cf3665a87 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
@@ -74,7 +74,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("basic") {
-    val listener = new SQLListener(sqlContext)
+    val listener = new SQLListener(sqlContext.sparkContext.conf)
     val executionId = 0
     val df = createTestDataFrame
     val accumulatorIds =
@@ -212,7 +212,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("onExecutionEnd happens before onJobEnd(JobSucceeded)") {
-    val listener = new SQLListener(sqlContext)
+    val listener = new SQLListener(sqlContext.sparkContext.conf)
     val executionId = 0
     val df = createTestDataFrame
     listener.onExecutionStart(
@@ -241,7 +241,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("onExecutionEnd happens before multiple onJobEnd(JobSucceeded)s") {
-    val listener = new SQLListener(sqlContext)
+    val listener = new SQLListener(sqlContext.sparkContext.conf)
     val executionId = 0
     val df = createTestDataFrame
     listener.onExecutionStart(
@@ -281,7 +281,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("onExecutionEnd happens before onJobEnd(JobFailed)") {
-    val listener = new SQLListener(sqlContext)
+    val listener = new SQLListener(sqlContext.sparkContext.conf)
     val executionId = 0
     val df = createTestDataFrame
     listener.onExecutionStart(
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index ddeadd3eb737..e620d7fb82af 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -40,12 +40,13 @@ import org.apache.spark.api.java.JavaSparkContext
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.SQLConf.SQLConfEntry._
 import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
 import org.apache.spark.sql.catalyst.expressions.{Expression, LeafExpression}
-import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.{InternalRow, ParserDialect, SqlParser}
 import org.apache.spark.sql.execution.datasources.{DataSourceStrategy, PreInsertCastAndRename, PreWriteCheck}
+import org.apache.spark.sql.execution.ui.SQLListener
 import org.apache.spark.sql.execution.{CacheManager, ExecutedCommand, ExtractPythonUDFs, SetCommand}
 import org.apache.spark.sql.hive.client._
 import org.apache.spark.sql.hive.execution.{DescribeHiveTableCommand, HiveNativeCommand}
@@ -88,12 +89,16 @@ private[hive] case class CurrentDatabase(ctx: HiveContext)
 class HiveContext private[hive](
     sc: SparkContext,
     cacheManager: CacheManager,
+    @transient listener: SQLListener,
     @transient execHive: ClientWrapper,
     @transient metaHive: ClientInterface,
-    isRootContext: Boolean) extends SQLContext(sc, cacheManager, isRootContext) with Logging {
+    isRootContext: Boolean)
+  extends SQLContext(sc, cacheManager, listener, isRootContext) with Logging {
   self =>
 
-  def this(sc: SparkContext) = this(sc, new CacheManager, null, null, true)
+  def this(sc: SparkContext) = {
+    this(sc, new CacheManager, SQLContext.createListenerAndUI(sc), null, null, true)
+  }
   def this(sc: JavaSparkContext) = this(sc.sc)
 
   import org.apache.spark.sql.hive.HiveContext._
@@ -109,6 +114,7 @@ class HiveContext private[hive](
     new HiveContext(
       sc = sc,
       cacheManager = cacheManager,
+      listener = listener,
       execHive = executionHive.newSession(),
       metaHive = metadataHive.newSession(),
       isRootContext = false)

From 5e3868ba139f5f0b3a33361c6b884594a3ab6421 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Tue, 13 Oct 2015 10:02:21 -0700
Subject: [PATCH 218/896] [SPARK-10051] [SPARKR] Support collecting data of
 StructType in DataFrame

Two points in this PR:

1.    Originally thought was that a named R list is assumed to be a struct in SerDe. But this is problematic because some R functions will implicitly generate named lists that are not intended to be a struct when transferred by SerDe. So SerDe clients have to explicitly mark a names list as struct by changing its class from "list" to "struct".

2.    SerDe is in the Spark Core module, and data of StructType is represented as GenricRow which is defined in Spark SQL module. SerDe can't import GenricRow as in maven build  Spark SQL module depends on Spark Core module. So this PR adds a registration hook in SerDe to allow SQLUtils in Spark SQL module to register its functions for serialization and deserialization of StructType.

Author: Sun Rui <rui.sun@intel.com>

Closes #8794 from sun-rui/SPARK-10051.
---
 R/pkg/R/SQLContext.R                          | 22 +++---
 R/pkg/R/deserialize.R                         | 10 +++
 R/pkg/R/schema.R                              | 28 +++++++-
 R/pkg/R/serialize.R                           | 43 +++++++----
 R/pkg/R/sparkR.R                              |  4 +-
 R/pkg/R/utils.R                               | 17 +++++
 R/pkg/inst/tests/test_sparkSQL.R              | 51 +++++++------
 .../scala/org/apache/spark/api/r/SerDe.scala  | 71 ++++++++++++++-----
 .../org/apache/spark/sql/api/r/SQLUtils.scala | 47 ++++++++++--
 9 files changed, 224 insertions(+), 69 deletions(-)

diff --git a/R/pkg/R/SQLContext.R b/R/pkg/R/SQLContext.R
index 1c58fd96d750..66c7e307212c 100644
--- a/R/pkg/R/SQLContext.R
+++ b/R/pkg/R/SQLContext.R
@@ -32,6 +32,7 @@ infer_type <- function(x) {
                  numeric = "double",
                  raw = "binary",
                  list = "array",
+                 struct = "struct",
                  environment = "map",
                  Date = "date",
                  POSIXlt = "timestamp",
@@ -44,17 +45,18 @@ infer_type <- function(x) {
     paste0("map<string,", infer_type(get(key, x)), ">")
   } else if (type == "array") {
     stopifnot(length(x) > 0)
+
+    paste0("array<", infer_type(x[[1]]), ">")
+  } else if (type == "struct") {
+    stopifnot(length(x) > 0)
     names <- names(x)
-    if (is.null(names)) {
-      paste0("array<", infer_type(x[[1]]), ">")
-    } else {
-      # StructType
-      types <- lapply(x, infer_type)
-      fields <- lapply(1:length(x), function(i) {
-        structField(names[[i]], types[[i]], TRUE)
-      })
-      do.call(structType, fields)
-    }
+    stopifnot(!is.null(names))
+
+    type <- lapply(seq_along(x), function(i) {
+      paste0(names[[i]], ":", infer_type(x[[i]]), ",")
+    })
+    type <- Reduce(paste0, type)
+    type <- paste0("struct<", substr(type, 1, nchar(type) - 1), ">")
   } else if (length(x) > 1) {
     paste0("array<", infer_type(x[[1]]), ">")
   } else {
diff --git a/R/pkg/R/deserialize.R b/R/pkg/R/deserialize.R
index ce88d0b071b7..f7e56e43016e 100644
--- a/R/pkg/R/deserialize.R
+++ b/R/pkg/R/deserialize.R
@@ -51,6 +51,7 @@ readTypedObject <- function(con, type) {
     "a" = readArray(con),
     "l" = readList(con),
     "e" = readEnv(con),
+    "s" = readStruct(con),
     "n" = NULL,
     "j" = getJobj(readString(con)),
     stop(paste("Unsupported type for deserialization", type)))
@@ -135,6 +136,15 @@ readEnv <- function(con) {
   env
 }
 
+# Read a field of StructType from DataFrame
+# into a named list in R whose class is "struct"
+readStruct <- function(con) {
+  names <- readObject(con)
+  fields <- readObject(con)
+  names(fields) <- names
+  listToStruct(fields)
+}
+
 readRaw <- function(con) {
   dataLen <- readInt(con)
   readBin(con, raw(), as.integer(dataLen), endian = "big")
diff --git a/R/pkg/R/schema.R b/R/pkg/R/schema.R
index 8df1563f8ebc..6f0e9a94e9bf 100644
--- a/R/pkg/R/schema.R
+++ b/R/pkg/R/schema.R
@@ -136,7 +136,7 @@ checkType <- function(type) {
     switch (firstChar,
             a = {
               # Array type
-              m <- regexec("^array<(.*)>$", type)
+              m <- regexec("^array<(.+)>$", type)
               matchedStrings <- regmatches(type, m)
               if (length(matchedStrings[[1]]) >= 2) {
                 elemType <- matchedStrings[[1]][2]
@@ -146,7 +146,7 @@ checkType <- function(type) {
             },
             m = {
               # Map type
-              m <- regexec("^map<(.*),(.*)>$", type)
+              m <- regexec("^map<(.+),(.+)>$", type)
               matchedStrings <- regmatches(type, m)
               if (length(matchedStrings[[1]]) >= 3) {
                 keyType <- matchedStrings[[1]][2]
@@ -157,6 +157,30 @@ checkType <- function(type) {
                 checkType(valueType)
                 return()
               }
+            },
+            s = {
+              # Struct type
+              m <- regexec("^struct<(.+)>$", type)
+              matchedStrings <- regmatches(type, m)
+              if (length(matchedStrings[[1]]) >= 2) {
+                fieldsString <- matchedStrings[[1]][2]
+                # strsplit does not return the final empty string, so check if
+                # the final char is ","
+                if (substr(fieldsString, nchar(fieldsString), nchar(fieldsString)) != ",") {
+                  fields <- strsplit(fieldsString, ",")[[1]]
+                  for (field in fields) {
+                    m <- regexec("^(.+):(.+)$", field)
+                    matchedStrings <- regmatches(field, m)
+                    if (length(matchedStrings[[1]]) >= 3) {
+                      fieldType <- matchedStrings[[1]][3]
+                      checkType(fieldType)
+                    } else {
+                      break
+                    }
+                  }
+                  return()
+                }
+              }
             })
   }
 
diff --git a/R/pkg/R/serialize.R b/R/pkg/R/serialize.R
index 91e6b3e5609b..17082b4e52fc 100644
--- a/R/pkg/R/serialize.R
+++ b/R/pkg/R/serialize.R
@@ -32,6 +32,21 @@
 # environment -> Map[String, T], where T is a native type
 # jobj -> Object, where jobj is an object created in the backend
 
+getSerdeType <- function(object) {
+  type <- class(object)[[1]]
+  if (type != "list") {
+    type
+  } else {
+    # Check if all elements are of same type
+    elemType <- unique(sapply(object, function(elem) { getSerdeType(elem) }))
+    if (length(elemType) <= 1) {
+      "array"
+    } else {
+      "list"
+    }
+  }
+}
+
 writeObject <- function(con, object, writeType = TRUE) {
   # NOTE: In R vectors have same type as objects. So we don't support
   # passing in vectors as arrays and instead require arrays to be passed
@@ -45,10 +60,12 @@ writeObject <- function(con, object, writeType = TRUE) {
       type <- "NULL"
     }
   }
+
+  serdeType <- getSerdeType(object)
   if (writeType) {
-    writeType(con, type)
+    writeType(con, serdeType)
   }
-  switch(type,
+  switch(serdeType,
          NULL = writeVoid(con),
          integer = writeInt(con, object),
          character = writeString(con, object),
@@ -56,7 +73,9 @@ writeObject <- function(con, object, writeType = TRUE) {
          double = writeDouble(con, object),
          numeric = writeDouble(con, object),
          raw = writeRaw(con, object),
+         array = writeArray(con, object),
          list = writeList(con, object),
+         struct = writeList(con, object),
          jobj = writeJobj(con, object),
          environment = writeEnv(con, object),
          Date = writeDate(con, object),
@@ -110,7 +129,7 @@ writeRowSerialize <- function(outputCon, rows) {
 serializeRow <- function(row) {
   rawObj <- rawConnection(raw(0), "wb")
   on.exit(close(rawObj))
-  writeGenericList(rawObj, row)
+  writeList(rawObj, row)
   rawConnectionValue(rawObj)
 }
 
@@ -128,7 +147,9 @@ writeType <- function(con, class) {
                  double = "d",
                  numeric = "d",
                  raw = "r",
+                 array = "a",
                  list = "l",
+                 struct = "s",
                  jobj = "j",
                  environment = "e",
                  Date = "D",
@@ -139,15 +160,13 @@ writeType <- function(con, class) {
 }
 
 # Used to pass arrays where all the elements are of the same type
-writeList <- function(con, arr) {
-  # All elements should be of same type
-  elemType <- unique(sapply(arr, function(elem) { class(elem) }))
-  stopifnot(length(elemType) <= 1)
-
+writeArray <- function(con, arr) {
   # TODO: Empty lists are given type "character" right now.
   # This may not work if the Java side expects array of any other type.
-  if (length(elemType) == 0) {
+  if (length(arr) == 0) {
     elemType <- class("somestring")
+  } else {
+    elemType <- getSerdeType(arr[[1]])
   }
 
   writeType(con, elemType)
@@ -161,7 +180,7 @@ writeList <- function(con, arr) {
 }
 
 # Used to pass arrays where the elements can be of different types
-writeGenericList <- function(con, list) {
+writeList <- function(con, list) {
   writeInt(con, length(list))
   for (elem in list) {
     writeObject(con, elem)
@@ -174,9 +193,9 @@ writeEnv <- function(con, env) {
 
   writeInt(con, len)
   if (len > 0) {
-    writeList(con, as.list(ls(env)))
+    writeArray(con, as.list(ls(env)))
     vals <- lapply(ls(env), function(x) { env[[x]] })
-    writeGenericList(con, as.list(vals))
+    writeList(con, as.list(vals))
   }
 }
 
diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index 3c57a44db257..cc47110f5473 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -178,7 +178,7 @@ sparkR.init <- function(
   }
 
   nonEmptyJars <- Filter(function(x) { x != "" }, jars)
-  localJarPaths <- sapply(nonEmptyJars,
+  localJarPaths <- lapply(nonEmptyJars,
                           function(j) { utils::URLencode(paste("file:", uriSep, j, sep = "")) })
 
   # Set the start time to identify jobjs
@@ -193,7 +193,7 @@ sparkR.init <- function(
       master,
       appName,
       as.character(sparkHome),
-      as.list(localJarPaths),
+      localJarPaths,
       sparkEnvirMap,
       sparkExecutorEnvMap),
     envir = .sparkREnv
diff --git a/R/pkg/R/utils.R b/R/pkg/R/utils.R
index 69a2bc728f84..94f16c7ac52c 100644
--- a/R/pkg/R/utils.R
+++ b/R/pkg/R/utils.R
@@ -588,3 +588,20 @@ mergePartitions <- function(rdd, zip) {
 
   PipelinedRDD(rdd, partitionFunc)
 }
+
+# Convert a named list to struct so that
+# SerDe won't confuse between a normal named list and struct
+listToStruct <- function(list) {
+  stopifnot(class(list) == "list")
+  stopifnot(!is.null(names(list)))
+  class(list) <- "struct"
+  list
+}
+
+# Convert a struct to a named list
+structToList <- function(struct) {
+  stopifnot(class(list) == "struct")
+
+  class(struct) <- "list"
+  struct
+}
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 3a04edbb4c11..af6efa40fb2f 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -66,10 +66,7 @@ test_that("infer types and check types", {
   expect_equal(infer_type(as.POSIXlt("2015-03-11 12:13:04.043")), "timestamp")
   expect_equal(infer_type(c(1L, 2L)), "array<integer>")
   expect_equal(infer_type(list(1L, 2L)), "array<integer>")
-  testStruct <- infer_type(list(a = 1L, b = "2"))
-  expect_equal(class(testStruct), "structType")
-  checkStructField(testStruct$fields()[[1]], "a", "IntegerType", TRUE)
-  checkStructField(testStruct$fields()[[2]], "b", "StringType", TRUE)
+  expect_equal(infer_type(listToStruct(list(a = 1L, b = "2"))), "struct<a:integer,b:string>")
   e <- new.env()
   assign("a", 1L, envir = e)
   expect_equal(infer_type(e), "map<string,integer>")
@@ -242,38 +239,36 @@ test_that("create DataFrame with different data types", {
   expect_equal(collect(df), data.frame(l, stringsAsFactors = FALSE))
 })
 
-test_that("create DataFrame with nested array and map", {
-#  e <- new.env()
-#  assign("n", 3L, envir = e)
-#  l <- list(1:10, list("a", "b"), e, list(a="aa", b=3L))
-#  df <- createDataFrame(sqlContext, list(l), c("a", "b", "c", "d"))
-#  expect_equal(dtypes(df), list(c("a", "array<int>"), c("b", "array<string>"),
-#                                c("c", "map<string,int>"), c("d", "struct<a:string,b:int>")))
-#  expect_equal(count(df), 1)
-#  ldf <- collect(df)
-#  expect_equal(ldf[1,], l[[1]])
-
-  #  ArrayType and MapType
+test_that("create DataFrame with complex types", {
   e <- new.env()
   assign("n", 3L, envir = e)
 
-  l <- list(as.list(1:10), list("a", "b"), e)
-  df <- createDataFrame(sqlContext, list(l), c("a", "b", "c"))
+  s <- listToStruct(list(a = "aa", b = 3L))
+
+  l <- list(as.list(1:10), list("a", "b"), e, s)
+  df <- createDataFrame(sqlContext, list(l), c("a", "b", "c", "d"))
   expect_equal(dtypes(df), list(c("a", "array<int>"),
                                 c("b", "array<string>"),
-                                c("c", "map<string,int>")))
+                                c("c", "map<string,int>"),
+                                c("d", "struct<a:string,b:int>")))
   expect_equal(count(df), 1)
   ldf <- collect(df)
-  expect_equal(names(ldf), c("a", "b", "c"))
+  expect_equal(names(ldf), c("a", "b", "c", "d"))
   expect_equal(ldf[1, 1][[1]], l[[1]])
   expect_equal(ldf[1, 2][[1]], l[[2]])
+
   e <- ldf$c[[1]]
   expect_equal(class(e), "environment")
   expect_equal(ls(e), "n")
   expect_equal(e$n, 3L)
+
+  s <- ldf$d[[1]]
+  expect_equal(class(s), "struct")
+  expect_equal(s$a, "aa")
+  expect_equal(s$b, 3L)
 })
 
-# For test map type in DataFrame
+# For test map type and struct type in DataFrame
 mockLinesMapType <- c("{\"name\":\"Bob\",\"info\":{\"age\":16,\"height\":176.5}}",
                       "{\"name\":\"Alice\",\"info\":{\"age\":20,\"height\":164.3}}",
                       "{\"name\":\"David\",\"info\":{\"age\":60,\"height\":180}}")
@@ -308,7 +303,19 @@ test_that("Collect DataFrame with complex types", {
   expect_equal(bob$age, 16)
   expect_equal(bob$height, 176.5)
 
-  # TODO: tests for StructType after it is supported
+  # StructType
+  df <- jsonFile(sqlContext, mapTypeJsonPath)
+  expect_equal(dtypes(df), list(c("info", "struct<age:bigint,height:double>"),
+                                c("name", "string")))
+  ldf <- collect(df)
+  expect_equal(nrow(ldf), 3)
+  expect_equal(ncol(ldf), 2)
+  expect_equal(names(ldf), c("info", "name"))
+  expect_equal(ldf$name, c("Bob", "Alice", "David"))
+  bob <- ldf$info[[1]]
+  expect_equal(class(bob), "struct")
+  expect_equal(bob$age, 16)
+  expect_equal(bob$height, 176.5)
 })
 
 test_that("jsonFile() on a local file returns a DataFrame", {
diff --git a/core/src/main/scala/org/apache/spark/api/r/SerDe.scala b/core/src/main/scala/org/apache/spark/api/r/SerDe.scala
index 0c78613e406e..da126bac7ad1 100644
--- a/core/src/main/scala/org/apache/spark/api/r/SerDe.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/SerDe.scala
@@ -27,6 +27,14 @@ import scala.collection.mutable.WrappedArray
  * Utility functions to serialize, deserialize objects to / from R
  */
 private[spark] object SerDe {
+  type ReadObject = (DataInputStream, Char) => Object
+  type WriteObject = (DataOutputStream, Object) => Boolean
+
+  var sqlSerDe: (ReadObject, WriteObject) = _
+
+  def registerSqlSerDe(sqlSerDe: (ReadObject, WriteObject)): Unit = {
+    this.sqlSerDe = sqlSerDe
+  }
 
   // Type mapping from R to Java
   //
@@ -63,11 +71,22 @@ private[spark] object SerDe {
       case 'c' => readString(dis)
       case 'e' => readMap(dis)
       case 'r' => readBytes(dis)
+      case 'a' => readArray(dis)
       case 'l' => readList(dis)
       case 'D' => readDate(dis)
       case 't' => readTime(dis)
       case 'j' => JVMObjectTracker.getObject(readString(dis))
-      case _ => throw new IllegalArgumentException(s"Invalid type $dataType")
+      case _ =>
+        if (sqlSerDe == null || sqlSerDe._1 == null) {
+          throw new IllegalArgumentException (s"Invalid type $dataType")
+        } else {
+          val obj = (sqlSerDe._1)(dis, dataType)
+          if (obj == null) {
+            throw new IllegalArgumentException (s"Invalid type $dataType")
+          } else {
+            obj
+          }
+        }
     }
   }
 
@@ -141,7 +160,8 @@ private[spark] object SerDe {
     (0 until len).map(_ => readString(in)).toArray
   }
 
-  def readList(dis: DataInputStream): Array[_] = {
+  // All elements of an array must be of the same type
+  def readArray(dis: DataInputStream): Array[_] = {
     val arrType = readObjectType(dis)
     arrType match {
       case 'i' => readIntArr(dis)
@@ -150,26 +170,43 @@ private[spark] object SerDe {
       case 'b' => readBooleanArr(dis)
       case 'j' => readStringArr(dis).map(x => JVMObjectTracker.getObject(x))
       case 'r' => readBytesArr(dis)
-      case 'l' => {
+      case 'a' =>
+        val len = readInt(dis)
+        (0 until len).map(_ => readArray(dis)).toArray
+      case 'l' =>
         val len = readInt(dis)
         (0 until len).map(_ => readList(dis)).toArray
-      }
-      case _ => throw new IllegalArgumentException(s"Invalid array type $arrType")
+      case _ =>
+        if (sqlSerDe == null || sqlSerDe._1 == null) {
+          throw new IllegalArgumentException (s"Invalid array type $arrType")
+        } else {
+          val len = readInt(dis)
+          (0 until len).map { _ =>
+            val obj = (sqlSerDe._1)(dis, arrType)
+            if (obj == null) {
+              throw new IllegalArgumentException (s"Invalid array type $arrType")
+            } else {
+              obj
+            }
+          }.toArray
+        }
     }
   }
 
+  // Each element of a list can be of different type. They are all represented
+  // as Object on JVM side
+  def readList(dis: DataInputStream): Array[Object] = {
+    val len = readInt(dis)
+    (0 until len).map(_ => readObject(dis)).toArray
+  }
+
   def readMap(in: DataInputStream): java.util.Map[Object, Object] = {
     val len = readInt(in)
     if (len > 0) {
-      val keysType = readObjectType(in)
-      val keysLen = readInt(in)
-      val keys = (0 until keysLen).map(_ => readTypedObject(in, keysType))
-
-      val valuesLen = readInt(in)
-      val values = (0 until valuesLen).map(_ => {
-        val valueType = readObjectType(in)
-        readTypedObject(in, valueType)
-      })
+      // Keys is an array of String
+      val keys = readArray(in).asInstanceOf[Array[Object]]
+      val values = readList(in)
+
       keys.zip(values).toMap.asJava
     } else {
       new java.util.HashMap[Object, Object]()
@@ -338,8 +375,10 @@ private[spark] object SerDe {
           }
 
         case _ =>
-          writeType(dos, "jobj")
-          writeJObj(dos, value)
+          if (sqlSerDe == null || sqlSerDe._2 == null || !(sqlSerDe._2)(dos, value)) {
+            writeType(dos, "jobj")
+            writeJObj(dos, value)
+          }
       }
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
index f45d119c8cfd..b0120a8d0dc4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
@@ -22,13 +22,15 @@ import java.io.{ByteArrayInputStream, ByteArrayOutputStream, DataInputStream, Da
 import org.apache.spark.api.java.{JavaRDD, JavaSparkContext}
 import org.apache.spark.api.r.SerDe
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.expressions.{Alias, Expression, NamedExpression}
+import org.apache.spark.sql.catalyst.expressions.{Alias, Expression, NamedExpression, GenericRowWithSchema}
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.{Column, DataFrame, GroupedData, Row, SQLContext, SaveMode}
 
 import scala.util.matching.Regex
 
 private[r] object SQLUtils {
+  SerDe.registerSqlSerDe((readSqlObject, writeSqlObject))
+
   def createSQLContext(jsc: JavaSparkContext): SQLContext = {
     new SQLContext(jsc)
   }
@@ -61,15 +63,27 @@ private[r] object SQLUtils {
       case "boolean" => org.apache.spark.sql.types.BooleanType
       case "timestamp" => org.apache.spark.sql.types.TimestampType
       case "date" => org.apache.spark.sql.types.DateType
-      case r"\Aarray<(.*)${elemType}>\Z" => {
+      case r"\Aarray<(.+)${elemType}>\Z" =>
         org.apache.spark.sql.types.ArrayType(getSQLDataType(elemType))
-      }
-      case r"\Amap<(.*)${keyType},(.*)${valueType}>\Z" => {
+      case r"\Amap<(.+)${keyType},(.+)${valueType}>\Z" =>
         if (keyType != "string" && keyType != "character") {
           throw new IllegalArgumentException("Key type of a map must be string or character")
         }
         org.apache.spark.sql.types.MapType(getSQLDataType(keyType), getSQLDataType(valueType))
-      }
+      case r"\Astruct<(.+)${fieldsStr}>\Z" =>
+        if (fieldsStr(fieldsStr.length - 1) == ',') {
+          throw new IllegalArgumentException(s"Invaid type $dataType")
+        }
+        val fields = fieldsStr.split(",")
+        val structFields = fields.map { field =>
+          field match {
+            case r"\A(.+)${fieldName}:(.+)${fieldType}\Z" =>
+              createStructField(fieldName, fieldType, true)
+
+            case _ => throw new IllegalArgumentException(s"Invaid type $dataType")
+          }
+        }
+        createStructType(structFields)
       case _ => throw new IllegalArgumentException(s"Invaid type $dataType")
     }
   }
@@ -151,4 +165,27 @@ private[r] object SQLUtils {
       options: java.util.Map[String, String]): DataFrame = {
     sqlContext.read.format(source).schema(schema).options(options).load()
   }
+
+  def readSqlObject(dis: DataInputStream, dataType: Char): Object = {
+    dataType match {
+      case 's' =>
+        // Read StructType for DataFrame
+        val fields = SerDe.readList(dis).asInstanceOf[Array[Object]]
+        Row.fromSeq(fields)
+      case _ => null
+    }
+  }
+
+  def writeSqlObject(dos: DataOutputStream, obj: Object): Boolean = {
+    obj match {
+      // Handle struct type in DataFrame
+      case v: GenericRowWithSchema =>
+        dos.writeByte('s')
+        SerDe.writeObject(dos, v.schema.fieldNames)
+        SerDe.writeObject(dos, v.values)
+        true
+      case _ =>
+        false
+    }
+  }
 }

From 1e0aba90b9e73834af70d196f7f869b062d98d94 Mon Sep 17 00:00:00 2001
From: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>
Date: Tue, 13 Oct 2015 10:09:05 -0700
Subject: [PATCH 219/896] [SPARK-10888] [SPARKR] Added as.DataFrame as a
 synonym to createDataFrame

as.DataFrame is more a R-style like signature.
Also, I'd like to know if we could make the context, e.g. sqlContext global, so that we do not have to specify it as an argument, when we each time create a dataframe.

Author: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>

Closes #8952 from NarineK/sparkrasDataFrame.
---
 R/pkg/NAMESPACE                  |  3 ++-
 R/pkg/R/SQLContext.R             | 17 +++++++++++++----
 R/pkg/inst/tests/test_sparkSQL.R | 15 +++++++++++++++
 3 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 95d949ee3e5a..41986a5e7ab7 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -228,7 +228,8 @@ exportMethods("agg")
 export("sparkRSQL.init",
        "sparkRHive.init")
 
-export("cacheTable",
+export("as.DataFrame",
+       "cacheTable",
        "clearCache",
        "createDataFrame",
        "createExternalTable",
diff --git a/R/pkg/R/SQLContext.R b/R/pkg/R/SQLContext.R
index 66c7e307212c..399f53657a68 100644
--- a/R/pkg/R/SQLContext.R
+++ b/R/pkg/R/SQLContext.R
@@ -64,21 +64,23 @@ infer_type <- function(x) {
   }
 }
 
-#' Create a DataFrame from an RDD
+#' Create a DataFrame
 #'
-#' Converts an RDD to a DataFrame by infer the types.
+#' Converts R data.frame or list into DataFrame.
 #'
 #' @param sqlContext A SQLContext
 #' @param data An RDD or list or data.frame
 #' @param schema a list of column names or named list (StructType), optional
 #' @return an DataFrame
+#' @rdname createDataFrame
 #' @export
 #' @examples
 #'\dontrun{
 #' sc <- sparkR.init()
 #' sqlContext <- sparkRSQL.init(sc)
-#' rdd <- lapply(parallelize(sc, 1:10), function(x) list(a=x, b=as.character(x)))
-#' df <- createDataFrame(sqlContext, rdd)
+#' df1 <- as.DataFrame(sqlContext, iris)
+#' df2 <- as.DataFrame(sqlContext, list(3,4,5,6))
+#' df3 <- createDataFrame(sqlContext, iris)
 #' }
 
 # TODO(davies): support sampling and infer type from NA
@@ -151,6 +153,13 @@ createDataFrame <- function(sqlContext, data, schema = NULL, samplingRatio = 1.0
   dataFrame(sdf)
 }
 
+#' @rdname createDataFrame
+#' @aliases createDataFrame
+#' @export
+as.DataFrame <- function(sqlContext, data, schema = NULL, samplingRatio = 1.0) {
+  createDataFrame(sqlContext, data, schema, samplingRatio)
+}
+
 # toDF
 #
 # Converts an RDD to a DataFrame by infer the types.
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index af6efa40fb2f..b59999485467 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -89,17 +89,28 @@ test_that("structType and structField", {
 test_that("create DataFrame from RDD", {
   rdd <- lapply(parallelize(sc, 1:10), function(x) { list(x, as.character(x)) })
   df <- createDataFrame(sqlContext, rdd, list("a", "b"))
+  dfAsDF <- as.DataFrame(sqlContext, rdd, list("a", "b"))
   expect_is(df, "DataFrame")
+  expect_is(dfAsDF, "DataFrame")
   expect_equal(count(df), 10)
+  expect_equal(count(dfAsDF), 10)
   expect_equal(nrow(df), 10)
+  expect_equal(nrow(dfAsDF), 10)
   expect_equal(ncol(df), 2)
+  expect_equal(ncol(dfAsDF), 2)
   expect_equal(dim(df), c(10, 2))
+  expect_equal(dim(dfAsDF), c(10, 2))
   expect_equal(columns(df), c("a", "b"))
+  expect_equal(columns(dfAsDF), c("a", "b"))
   expect_equal(dtypes(df), list(c("a", "int"), c("b", "string")))
+  expect_equal(dtypes(dfAsDF), list(c("a", "int"), c("b", "string")))
 
   df <- createDataFrame(sqlContext, rdd)
+  dfAsDF <- as.DataFrame(sqlContext, rdd)
   expect_is(df, "DataFrame")
+  expect_is(dfAsDF, "DataFrame")
   expect_equal(columns(df), c("_1", "_2"))
+  expect_equal(columns(dfAsDF), c("_1", "_2"))
 
   schema <- structType(structField(x = "a", type = "integer", nullable = TRUE),
                         structField(x = "b", type = "string", nullable = TRUE))
@@ -130,9 +141,13 @@ test_that("create DataFrame from RDD", {
   schema <- structType(structField("name", "string"), structField("age", "integer"),
                        structField("height", "float"))
   df2 <- createDataFrame(sqlContext, df.toRDD, schema)
+  df2AsDF <- as.DataFrame(sqlContext, df.toRDD, schema)
   expect_equal(columns(df2), c("name", "age", "height"))
+  expect_equal(columns(df2AsDF), c("name", "age", "height"))
   expect_equal(dtypes(df2), list(c("name", "string"), c("age", "int"), c("height", "float")))
+  expect_equal(dtypes(df2AsDF), list(c("name", "string"), c("age", "int"), c("height", "float")))
   expect_equal(collect(where(df2, df2$name == "Bob")), c("Bob", 16, 176.5))
+  expect_equal(collect(where(df2AsDF, df2$name == "Bob")), c("Bob", 16, 176.5))
 
   localDF <- data.frame(name=c("John", "Smith", "Sarah"),
                         age=c(19, 23, 18),

From f7f28ee7a513c262d52cf433d25fbf06df9bd1f1 Mon Sep 17 00:00:00 2001
From: Adrian Zhuang <adrian555@users.noreply.github.com>
Date: Tue, 13 Oct 2015 10:21:07 -0700
Subject: [PATCH 220/896] [SPARK-10913] [SPARKR] attach() function support

Bring the change code up to date.

Author: Adrian Zhuang <adrian555@users.noreply.github.com>
Author: adrian555 <wzhuang@us.ibm.com>

Closes #9031 from adrian555/attach2.
---
 R/pkg/NAMESPACE                  |  1 +
 R/pkg/R/DataFrame.R              | 30 ++++++++++++++++++++++++++++++
 R/pkg/R/generics.R               |  4 ++++
 R/pkg/inst/tests/test_sparkSQL.R | 20 ++++++++++++++++++++
 4 files changed, 55 insertions(+)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 41986a5e7ab7..ed9cd94e03b1 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -23,6 +23,7 @@ export("setJobGroup",
 exportClasses("DataFrame")
 
 exportMethods("arrange",
+              "attach",
               "cache",
               "collect",
               "columns",
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 1b9137e6c793..e0ce05624358 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1881,3 +1881,33 @@ setMethod("as.data.frame",
             }
             collect(x)
           })
+
+#' The specified DataFrame is attached to the R search path. This means that
+#' the DataFrame is searched by R when evaluating a variable, so columns in
+#' the DataFrame can be accessed by simply giving their names.
+#'
+#' @rdname attach
+#' @title Attach DataFrame to R search path
+#' @param what (DataFrame) The DataFrame to attach
+#' @param pos (integer) Specify position in search() where to attach.
+#' @param name (character) Name to use for the attached DataFrame. Names
+#'   starting with package: are reserved for library.
+#' @param warn.conflicts (logical) If TRUE, warnings are printed about conflicts
+#' from attaching the database, unless that DataFrame contains an object
+#' @examples
+#' \dontrun{
+#' attach(irisDf)
+#' summary(Sepal_Width)
+#' }
+#' @seealso \link{detach}
+setMethod("attach",
+          signature(what = "DataFrame"),
+          function(what, pos = 2, name = deparse(substitute(what)), warn.conflicts = TRUE) {
+            cols <- columns(what)
+            stopifnot(length(cols) > 0)
+            newEnv <- new.env()
+            for (i in 1:length(cols)) {
+              assign(x = cols[i], value = what[, cols[i]], envir = newEnv)
+            }
+            attach(newEnv, pos = pos, name = name, warn.conflicts = warn.conflicts)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 8fad17026c06..c106a0024583 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -1003,3 +1003,7 @@ setGeneric("rbind", signature = "...")
 #' @rdname as.data.frame
 #' @export
 setGeneric("as.data.frame")
+
+#' @rdname attach
+#' @export
+setGeneric("attach")
\ No newline at end of file
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index b59999485467..d5509e475de0 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1405,6 +1405,26 @@ test_that("Method as.data.frame as a synonym for collect()", {
   expect_equal(as.data.frame(irisDF2), collect(irisDF2))
 })
 
+test_that("attach() on a DataFrame", {
+  df <- jsonFile(sqlContext, jsonPath)
+  expect_error(age)
+  attach(df)
+  expect_is(age, "DataFrame")
+  expected_age <- data.frame(age = c(NA, 30, 19))
+  expect_equal(head(age), expected_age)
+  stat <- summary(age)
+  expect_equal(collect(stat)[5, "age"], "30")
+  age <- age$age + 1
+  expect_is(age, "Column")
+  rm(age)
+  stat2 <- summary(age)
+  expect_equal(collect(stat2)[5, "age"], "30")
+  detach("df")
+  stat3 <- summary(df[, "age"])
+  expect_equal(collect(stat3)[5, "age"], "30")
+  expect_error(age)
+})
+
 unlink(parquetPath)
 unlink(jsonPath)
 unlink(jsonPathNa)

From c75f058b72d492d6de898957b3058f242d70dd8a Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 13 Oct 2015 12:03:46 -0700
Subject: [PATCH 221/896] [PYTHON] [MINOR] List modules in PySpark tests when
 given bad name

Output list of supported modules for python tests in error message when given bad module name.

CC: davies

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9088 from jkbradley/python-tests-modules.
---
 python/run-tests.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/run-tests.py b/python/run-tests.py
index fd56c7ab6e0e..152f5cc98d0f 100755
--- a/python/run-tests.py
+++ b/python/run-tests.py
@@ -167,7 +167,8 @@ def main():
         if module_name in python_modules:
             modules_to_test.append(python_modules[module_name])
         else:
-            print("Error: unrecognized module %s" % module_name)
+            print("Error: unrecognized module '%s'. Supported modules: %s" %
+                  (module_name, ", ".join(python_modules)))
             sys.exit(-1)
     LOGGER.info("Will test against the following Python executables: %s", python_execs)
     LOGGER.info("Will test the following Python modules: %s", [x.name for x in modules_to_test])

From 2b574f52d7bf51b1fe2a73086a3735b633e9083f Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 13 Oct 2015 13:24:10 -0700
Subject: [PATCH 222/896] [SPARK-7402] [ML] JSON SerDe for standard param types

This PR implements the JSON SerDe for the following param types: `Boolean`, `Int`, `Long`, `Float`, `Double`, `String`, `Array[Int]`, `Array[Double]`, and `Array[String]`. The implementation of `Float`, `Double`, and `Array[Double]` are specialized to handle `NaN` and `Inf`s. This will be used in pipeline persistence. jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9090 from mengxr/SPARK-7402.
---
 .../org/apache/spark/ml/param/params.scala    | 169 ++++++++++++++++++
 .../apache/spark/ml/param/ParamsSuite.scala   | 114 ++++++++++++
 2 files changed, 283 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
index ec98b05e13b8..8361406f8729 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
@@ -24,6 +24,9 @@ import scala.annotation.varargs
 import scala.collection.mutable
 import scala.collection.JavaConverters._
 
+import org.json4s._
+import org.json4s.jackson.JsonMethods._
+
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.ml.util.Identifiable
 
@@ -80,6 +83,30 @@ class Param[T](val parent: String, val name: String, val doc: String, val isVali
   /** Creates a param pair with the given value (for Scala). */
   def ->(value: T): ParamPair[T] = ParamPair(this, value)
 
+  /** Encodes a param value into JSON, which can be decoded by [[jsonDecode()]]. */
+  def jsonEncode(value: T): String = {
+    value match {
+      case x: String =>
+        compact(render(JString(x)))
+      case _ =>
+        throw new NotImplementedError(
+          "The default jsonEncode only supports string. " +
+            s"${this.getClass.getName} must override jsonEncode for ${value.getClass.getName}.")
+    }
+  }
+
+  /** Decodes a param value from JSON. */
+  def jsonDecode(json: String): T = {
+    parse(json) match {
+      case JString(x) =>
+        x.asInstanceOf[T]
+      case _ =>
+        throw new NotImplementedError(
+          "The default jsonDecode only supports string. " +
+            s"${this.getClass.getName} must override jsonDecode to support its value type.")
+    }
+  }
+
   override final def toString: String = s"${parent}__$name"
 
   override final def hashCode: Int = toString.##
@@ -198,6 +225,46 @@ class DoubleParam(parent: String, name: String, doc: String, isValid: Double =>
 
   /** Creates a param pair with the given value (for Java). */
   override def w(value: Double): ParamPair[Double] = super.w(value)
+
+  override def jsonEncode(value: Double): String = {
+    compact(render(DoubleParam.jValueEncode(value)))
+  }
+
+  override def jsonDecode(json: String): Double = {
+    DoubleParam.jValueDecode(parse(json))
+  }
+}
+
+private[param] object DoubleParam {
+  /** Encodes a param value into JValue. */
+  def jValueEncode(value: Double): JValue = {
+    value match {
+      case _ if value.isNaN =>
+        JString("NaN")
+      case Double.NegativeInfinity =>
+        JString("-Inf")
+      case Double.PositiveInfinity =>
+        JString("Inf")
+      case _ =>
+        JDouble(value)
+    }
+  }
+
+  /** Decodes a param value from JValue. */
+  def jValueDecode(jValue: JValue): Double = {
+    jValue match {
+      case JString("NaN") =>
+        Double.NaN
+      case JString("-Inf") =>
+        Double.NegativeInfinity
+      case JString("Inf") =>
+        Double.PositiveInfinity
+      case JDouble(x) =>
+        x
+      case _ =>
+        throw new IllegalArgumentException(s"Cannot decode $jValue to Double.")
+    }
+  }
 }
 
 /**
@@ -218,6 +285,15 @@ class IntParam(parent: String, name: String, doc: String, isValid: Int => Boolea
 
   /** Creates a param pair with the given value (for Java). */
   override def w(value: Int): ParamPair[Int] = super.w(value)
+
+  override def jsonEncode(value: Int): String = {
+    compact(render(JInt(value)))
+  }
+
+  override def jsonDecode(json: String): Int = {
+    implicit val formats = DefaultFormats
+    parse(json).extract[Int]
+  }
 }
 
 /**
@@ -238,6 +314,47 @@ class FloatParam(parent: String, name: String, doc: String, isValid: Float => Bo
 
   /** Creates a param pair with the given value (for Java). */
   override def w(value: Float): ParamPair[Float] = super.w(value)
+
+  override def jsonEncode(value: Float): String = {
+    compact(render(FloatParam.jValueEncode(value)))
+  }
+
+  override def jsonDecode(json: String): Float = {
+    FloatParam.jValueDecode(parse(json))
+  }
+}
+
+private object FloatParam {
+
+  /** Encodes a param value into JValue. */
+  def jValueEncode(value: Float): JValue = {
+    value match {
+      case _ if value.isNaN =>
+        JString("NaN")
+      case Float.NegativeInfinity =>
+        JString("-Inf")
+      case Float.PositiveInfinity =>
+        JString("Inf")
+      case _ =>
+        JDouble(value)
+    }
+  }
+
+  /** Decodes a param value from JValue. */
+  def jValueDecode(jValue: JValue): Float = {
+    jValue match {
+      case JString("NaN") =>
+        Float.NaN
+      case JString("-Inf") =>
+        Float.NegativeInfinity
+      case JString("Inf") =>
+        Float.PositiveInfinity
+      case JDouble(x) =>
+        x.toFloat
+      case _ =>
+        throw new IllegalArgumentException(s"Cannot decode $jValue to Float.")
+    }
+  }
 }
 
 /**
@@ -258,6 +375,15 @@ class LongParam(parent: String, name: String, doc: String, isValid: Long => Bool
 
   /** Creates a param pair with the given value (for Java). */
   override def w(value: Long): ParamPair[Long] = super.w(value)
+
+  override def jsonEncode(value: Long): String = {
+    compact(render(JInt(value)))
+  }
+
+  override def jsonDecode(json: String): Long = {
+    implicit val formats = DefaultFormats
+    parse(json).extract[Long]
+  }
 }
 
 /**
@@ -272,6 +398,15 @@ class BooleanParam(parent: String, name: String, doc: String) // No need for isV
 
   /** Creates a param pair with the given value (for Java). */
   override def w(value: Boolean): ParamPair[Boolean] = super.w(value)
+
+  override def jsonEncode(value: Boolean): String = {
+    compact(render(JBool(value)))
+  }
+
+  override def jsonDecode(json: String): Boolean = {
+    implicit val formats = DefaultFormats
+    parse(json).extract[Boolean]
+  }
 }
 
 /**
@@ -287,6 +422,16 @@ class StringArrayParam(parent: Params, name: String, doc: String, isValid: Array
 
   /** Creates a param pair with a [[java.util.List]] of values (for Java and Python). */
   def w(value: java.util.List[String]): ParamPair[Array[String]] = w(value.asScala.toArray)
+
+  override def jsonEncode(value: Array[String]): String = {
+    import org.json4s.JsonDSL._
+    compact(render(value.toSeq))
+  }
+
+  override def jsonDecode(json: String): Array[String] = {
+    implicit val formats = DefaultFormats
+    parse(json).extract[Seq[String]].toArray
+  }
 }
 
 /**
@@ -303,6 +448,20 @@ class DoubleArrayParam(parent: Params, name: String, doc: String, isValid: Array
   /** Creates a param pair with a [[java.util.List]] of values (for Java and Python). */
   def w(value: java.util.List[java.lang.Double]): ParamPair[Array[Double]] =
     w(value.asScala.map(_.asInstanceOf[Double]).toArray)
+
+  override def jsonEncode(value: Array[Double]): String = {
+    import org.json4s.JsonDSL._
+    compact(render(value.toSeq.map(DoubleParam.jValueEncode)))
+  }
+
+  override def jsonDecode(json: String): Array[Double] = {
+    parse(json) match {
+      case JArray(values) =>
+        values.map(DoubleParam.jValueDecode).toArray
+      case _ =>
+        throw new IllegalArgumentException(s"Cannot decode $json to Array[Double].")
+    }
+  }
 }
 
 /**
@@ -319,6 +478,16 @@ class IntArrayParam(parent: Params, name: String, doc: String, isValid: Array[In
   /** Creates a param pair with a [[java.util.List]] of values (for Java and Python). */
   def w(value: java.util.List[java.lang.Integer]): ParamPair[Array[Int]] =
     w(value.asScala.map(_.asInstanceOf[Int]).toArray)
+
+  override def jsonEncode(value: Array[Int]): String = {
+    import org.json4s.JsonDSL._
+    compact(render(value.toSeq))
+  }
+
+  override def jsonDecode(json: String): Array[Int] = {
+    implicit val formats = DefaultFormats
+    parse(json).extract[Seq[Int]].toArray
+  }
 }
 
 /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
index a2ea279f5d5e..eeb03dba2f82 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
@@ -21,6 +21,120 @@ import org.apache.spark.SparkFunSuite
 
 class ParamsSuite extends SparkFunSuite {
 
+  test("json encode/decode") {
+    val dummy = new Params {
+      override def copy(extra: ParamMap): Params = defaultCopy(extra)
+
+      override val uid: String = "dummy"
+    }
+
+    { // BooleanParam
+      val param = new BooleanParam(dummy, "name", "doc")
+      for (value <- Seq(true, false)) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
+    { // IntParam
+      val param = new IntParam(dummy, "name", "doc")
+      for (value <- Seq(Int.MinValue, -1, 0, 1, Int.MaxValue)) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
+    { // LongParam
+      val param = new LongParam(dummy, "name", "doc")
+      for (value <- Seq(Long.MinValue, -1L, 0L, 1L, Long.MaxValue)) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
+    { // FloatParam
+      val param = new FloatParam(dummy, "name", "doc")
+      for (value <- Seq(Float.NaN, Float.NegativeInfinity, Float.MinValue, -1.0f, -0.5f, 0.0f,
+        Float.MinPositiveValue, 0.5f, 1.0f, Float.MaxValue, Float.PositiveInfinity)) {
+        val json = param.jsonEncode(value)
+        val decoded = param.jsonDecode(json)
+        if (value.isNaN) {
+          assert(decoded.isNaN)
+        } else {
+          assert(decoded === value)
+        }
+      }
+    }
+
+    { // DoubleParam
+      val param = new DoubleParam(dummy, "name", "doc")
+      for (value <- Seq(Double.NaN, Double.NegativeInfinity, Double.MinValue, -1.0, -0.5, 0.0,
+          Double.MinPositiveValue, 0.5, 1.0, Double.MaxValue, Double.PositiveInfinity)) {
+        val json = param.jsonEncode(value)
+        val decoded = param.jsonDecode(json)
+        if (value.isNaN) {
+          assert(decoded.isNaN)
+        } else {
+          assert(decoded === value)
+        }
+      }
+    }
+
+    { // StringParam
+      val param = new Param[String](dummy, "name", "doc")
+      // Currently we do not support null.
+      for (value <- Seq("", "1", "abc", "quote\"", "newline\n")) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
+    { // IntArrayParam
+      val param = new IntArrayParam(dummy, "name", "doc")
+      val values: Seq[Array[Int]] = Seq(
+        Array(),
+        Array(1),
+        Array(Int.MinValue, 0, Int.MaxValue))
+      for (value <- values) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
+    { // DoubleArrayParam
+      val param = new DoubleArrayParam(dummy, "name", "doc")
+      val values: Seq[Array[Double]] = Seq(
+         Array(),
+         Array(1.0),
+         Array(Double.NaN, Double.NegativeInfinity, Double.MinValue, -1.0, 0.0,
+           Double.MinPositiveValue, 1.0, Double.MaxValue, Double.PositiveInfinity))
+      for (value <- values) {
+        val json = param.jsonEncode(value)
+        val decoded = param.jsonDecode(json)
+        assert(decoded.length === value.length)
+        decoded.zip(value).foreach { case (actual, expected) =>
+          if (expected.isNaN) {
+            assert(actual.isNaN)
+          } else {
+            assert(actual === expected)
+          }
+        }
+      }
+    }
+
+    { // StringArrayParam
+      val param = new StringArrayParam(dummy, "name", "doc")
+      val values: Seq[Array[String]] = Seq(
+        Array(),
+        Array(""),
+        Array("", "1", "abc", "quote\"", "newline\n"))
+      for (value <- values) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+  }
+
   test("param") {
     val solver = new TestParams()
     val uid = solver.uid

From b3ffac5178795f2d8e7908b3e77e8e89f50b5f6f Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Tue, 13 Oct 2015 13:49:59 -0700
Subject: [PATCH 223/896] [SPARK-10983] Unified memory manager
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This patch unifies the memory management of the storage and execution regions such that either side can borrow memory from each other. When memory pressure arises, storage will be evicted in favor of execution. To avoid regressions in cases where storage is crucial, we dynamically allocate a fraction of space for storage that execution cannot evict. Several configurations are introduced:

- **spark.memory.fraction (default 0.75)**: ​fraction of the heap space used for execution and storage. The lower this is, the more frequently spills and cached data eviction occur. The purpose of this config is to set aside memory for internal metadata, user data structures, and imprecise size estimation in the case of sparse, unusually large records.

- **spark.memory.storageFraction (default 0.5)**: size of the storage region within the space set aside by `s​park.memory.fraction`. ​Cached data may only be evicted if total storage exceeds this region.

- **spark.memory.useLegacyMode (default false)**: whether to use the memory management that existed in Spark 1.5 and before. This is mainly for backward compatibility.

For a detailed description of the design, see [SPARK-10000](https://issues.apache.org/jira/browse/SPARK-10000). This patch builds on top of the `MemoryManager` interface introduced in #9000.

Author: Andrew Or <andrew@databricks.com>

Closes #9084 from andrewor14/unified-memory-manager.
---
 .../scala/org/apache/spark/SparkConf.scala    |  23 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  11 +-
 .../apache/spark/memory/MemoryManager.scala   |  83 +++++--
 .../spark/memory/StaticMemoryManager.scala    | 105 +++------
 .../spark/memory/UnifiedMemoryManager.scala   | 141 ++++++++++++
 .../spark/shuffle/ShuffleMemoryManager.scala  |  38 ++--
 .../apache/spark/storage/BlockManager.scala   |   4 +
 .../apache/spark/storage/MemoryStore.scala    | 121 ++++++----
 .../collection/ExternalAppendOnlyMap.scala    |  10 -
 .../org/apache/spark/DistributedSuite.scala   |   7 +-
 .../scala/org/apache/spark/ShuffleSuite.scala |   6 +-
 .../spark/memory/MemoryManagerSuite.scala     | 133 +++++++++++
 .../memory/StaticMemoryManagerSuite.scala     | 105 ++++-----
 .../memory/UnifiedMemoryManagerSuite.scala    | 208 ++++++++++++++++++
 .../shuffle/ShuffleMemoryManagerSuite.scala   |   5 +-
 .../shuffle/unsafe/UnsafeShuffleSuite.scala   |   3 -
 .../ExternalAppendOnlyMapSuite.scala          |   9 +-
 .../util/collection/ExternalSorterSuite.scala |  23 +-
 docs/configuration.md                         |  99 ++++++---
 .../execution/TestShuffleMemoryManager.scala  |  10 +-
 .../execution/UnsafeRowSerializerSuite.scala  |   2 +-
 21 files changed, 840 insertions(+), 306 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
 create mode 100644 core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
 create mode 100644 core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/SparkConf.scala b/core/src/main/scala/org/apache/spark/SparkConf.scala
index b344b5e173d6..1a0ac3d01759 100644
--- a/core/src/main/scala/org/apache/spark/SparkConf.scala
+++ b/core/src/main/scala/org/apache/spark/SparkConf.scala
@@ -418,16 +418,35 @@ class SparkConf(loadDefaults: Boolean) extends Cloneable with Logging {
     }
 
     // Validate memory fractions
-    val memoryKeys = Seq(
+    val deprecatedMemoryKeys = Seq(
       "spark.storage.memoryFraction",
       "spark.shuffle.memoryFraction",
       "spark.shuffle.safetyFraction",
       "spark.storage.unrollFraction",
       "spark.storage.safetyFraction")
+    val memoryKeys = Seq(
+      "spark.memory.fraction",
+      "spark.memory.storageFraction") ++
+      deprecatedMemoryKeys
     for (key <- memoryKeys) {
       val value = getDouble(key, 0.5)
       if (value > 1 || value < 0) {
-        throw new IllegalArgumentException("$key should be between 0 and 1 (was '$value').")
+        throw new IllegalArgumentException(s"$key should be between 0 and 1 (was '$value').")
+      }
+    }
+
+    // Warn against deprecated memory fractions (unless legacy memory management mode is enabled)
+    val legacyMemoryManagementKey = "spark.memory.useLegacyMode"
+    val legacyMemoryManagement = getBoolean(legacyMemoryManagementKey, false)
+    if (!legacyMemoryManagement) {
+      val keyset = deprecatedMemoryKeys.toSet
+      val detected = settings.keys().asScala.filter(keyset.contains)
+      if (detected.nonEmpty) {
+        logWarning("Detected deprecated memory fraction settings: " +
+          detected.mkString("[", ", ", "]") + ". As of Spark 1.6, execution and storage " +
+          "memory management are unified. All memory fractions used in the old model are " +
+          "now deprecated and no longer read. If you wish to use the old memory management, " +
+          s"you may explicitly enable `$legacyMemoryManagementKey` (not recommended).")
       }
     }
 
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index df3d84a1f08e..c32998345145 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -30,7 +30,7 @@ import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.api.python.PythonWorkerFactory
 import org.apache.spark.broadcast.BroadcastManager
 import org.apache.spark.metrics.MetricsSystem
-import org.apache.spark.memory.{MemoryManager, StaticMemoryManager}
+import org.apache.spark.memory.{MemoryManager, StaticMemoryManager, UnifiedMemoryManager}
 import org.apache.spark.network.BlockTransferService
 import org.apache.spark.network.netty.NettyBlockTransferService
 import org.apache.spark.rpc.{RpcEndpointRef, RpcEndpoint, RpcEnv}
@@ -335,7 +335,14 @@ object SparkEnv extends Logging {
     val shuffleMgrClass = shortShuffleMgrNames.getOrElse(shuffleMgrName.toLowerCase, shuffleMgrName)
     val shuffleManager = instantiateClass[ShuffleManager](shuffleMgrClass)
 
-    val memoryManager = new StaticMemoryManager(conf)
+    val useLegacyMemoryManager = conf.getBoolean("spark.memory.useLegacyMode", false)
+    val memoryManager: MemoryManager =
+      if (useLegacyMemoryManager) {
+        new StaticMemoryManager(conf)
+      } else {
+        new UnifiedMemoryManager(conf)
+      }
+
     val shuffleMemoryManager = ShuffleMemoryManager.create(conf, memoryManager, numUsableCores)
 
     val blockTransferService = new NettyBlockTransferService(conf, securityManager, numUsableCores)
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
index 4bf73b696920..7168ac549106 100644
--- a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
@@ -19,6 +19,7 @@ package org.apache.spark.memory
 
 import scala.collection.mutable
 
+import org.apache.spark.Logging
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
 
 
@@ -29,7 +30,7 @@ import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
  * sorts and aggregations, while storage memory refers to that used for caching and propagating
  * internal data across the cluster. There exists one of these per JVM.
  */
-private[spark] abstract class MemoryManager {
+private[spark] abstract class MemoryManager extends Logging {
 
   // The memory store used to evict cached blocks
   private var _memoryStore: MemoryStore = _
@@ -40,19 +41,38 @@ private[spark] abstract class MemoryManager {
     _memoryStore
   }
 
+  // Amount of execution/storage memory in use, accesses must be synchronized on `this`
+  protected var _executionMemoryUsed: Long = 0
+  protected var _storageMemoryUsed: Long = 0
+
   /**
    * Set the [[MemoryStore]] used by this manager to evict cached blocks.
    * This must be set after construction due to initialization ordering constraints.
    */
-  def setMemoryStore(store: MemoryStore): Unit = {
+  final def setMemoryStore(store: MemoryStore): Unit = {
     _memoryStore = store
   }
 
   /**
-   * Acquire N bytes of memory for execution.
+   * Total available memory for execution, in bytes.
+   */
+  def maxExecutionMemory: Long
+
+  /**
+   * Total available memory for storage, in bytes.
+   */
+  def maxStorageMemory: Long
+
+  // TODO: avoid passing evicted blocks around to simplify method signatures (SPARK-10985)
+
+  /**
+   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
    * @return number of bytes successfully granted (<= N).
    */
-  def acquireExecutionMemory(numBytes: Long): Long
+  def acquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long
 
   /**
    * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
@@ -66,52 +86,73 @@ private[spark] abstract class MemoryManager {
 
   /**
    * Acquire N bytes of memory to unroll the given block, evicting existing ones if necessary.
+   *
+   * This extra method allows subclasses to differentiate behavior between acquiring storage
+   * memory and acquiring unroll memory. For instance, the memory management model in Spark
+   * 1.5 and before places a limit on the amount of space that can be freed from unrolling.
    * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   *
    * @return whether all N bytes were successfully granted.
    */
   def acquireUnrollMemory(
       blockId: BlockId,
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    acquireStorageMemory(blockId, numBytes, evictedBlocks)
+  }
 
   /**
    * Release N bytes of execution memory.
    */
-  def releaseExecutionMemory(numBytes: Long): Unit
+  def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
+    if (numBytes > _executionMemoryUsed) {
+      logWarning(s"Attempted to release $numBytes bytes of execution " +
+        s"memory when we only have ${_executionMemoryUsed} bytes")
+      _executionMemoryUsed = 0
+    } else {
+      _executionMemoryUsed -= numBytes
+    }
+  }
 
   /**
    * Release N bytes of storage memory.
    */
-  def releaseStorageMemory(numBytes: Long): Unit
+  def releaseStorageMemory(numBytes: Long): Unit = synchronized {
+    if (numBytes > _storageMemoryUsed) {
+      logWarning(s"Attempted to release $numBytes bytes of storage " +
+        s"memory when we only have ${_storageMemoryUsed} bytes")
+      _storageMemoryUsed = 0
+    } else {
+      _storageMemoryUsed -= numBytes
+    }
+  }
 
   /**
    * Release all storage memory acquired.
    */
-  def releaseStorageMemory(): Unit
+  def releaseAllStorageMemory(): Unit = synchronized {
+    _storageMemoryUsed = 0
+  }
 
   /**
    * Release N bytes of unroll memory.
    */
-  def releaseUnrollMemory(numBytes: Long): Unit
-
-  /**
-   * Total available memory for execution, in bytes.
-   */
-  def maxExecutionMemory: Long
-
-  /**
-   * Total available memory for storage, in bytes.
-   */
-  def maxStorageMemory: Long
+  def releaseUnrollMemory(numBytes: Long): Unit = synchronized {
+    releaseStorageMemory(numBytes)
+  }
 
   /**
    * Execution memory currently in use, in bytes.
    */
-  def executionMemoryUsed: Long
+  final def executionMemoryUsed: Long = synchronized {
+    _executionMemoryUsed
+  }
 
   /**
    * Storage memory currently in use, in bytes.
    */
-  def storageMemoryUsed: Long
+  final def storageMemoryUsed: Long = synchronized {
+    _storageMemoryUsed
+  }
 
 }
diff --git a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
index 150445edb957..fa44f3723415 100644
--- a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
@@ -19,7 +19,7 @@ package org.apache.spark.memory
 
 import scala.collection.mutable
 
-import org.apache.spark.{Logging, SparkConf}
+import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockId, BlockStatus}
 
 
@@ -34,17 +34,7 @@ private[spark] class StaticMemoryManager(
     conf: SparkConf,
     override val maxExecutionMemory: Long,
     override val maxStorageMemory: Long)
-  extends MemoryManager with Logging {
-
-  // Max number of bytes worth of blocks to evict when unrolling
-  private val maxMemoryToEvictForUnroll: Long = {
-    (maxStorageMemory * conf.getDouble("spark.storage.unrollFraction", 0.2)).toLong
-  }
-
-  // Amount of execution / storage memory in use
-  // Accesses must be synchronized on `this`
-  private var _executionMemoryUsed: Long = 0
-  private var _storageMemoryUsed: Long = 0
+  extends MemoryManager {
 
   def this(conf: SparkConf) {
     this(
@@ -53,11 +43,19 @@ private[spark] class StaticMemoryManager(
       StaticMemoryManager.getMaxStorageMemory(conf))
   }
 
+  // Max number of bytes worth of blocks to evict when unrolling
+  private val maxMemoryToEvictForUnroll: Long = {
+    (maxStorageMemory * conf.getDouble("spark.storage.unrollFraction", 0.2)).toLong
+  }
+
   /**
    * Acquire N bytes of memory for execution.
    * @return number of bytes successfully granted (<= N).
    */
-  override def acquireExecutionMemory(numBytes: Long): Long = synchronized {
+  override def acquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
+    assert(numBytes >= 0)
     assert(_executionMemoryUsed <= maxExecutionMemory)
     val bytesToGrant = math.min(numBytes, maxExecutionMemory - _executionMemoryUsed)
     _executionMemoryUsed += bytesToGrant
@@ -72,7 +70,7 @@ private[spark] class StaticMemoryManager(
   override def acquireStorageMemory(
       blockId: BlockId,
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
     acquireStorageMemory(blockId, numBytes, numBytes, evictedBlocks)
   }
 
@@ -88,7 +86,7 @@ private[spark] class StaticMemoryManager(
   override def acquireUnrollMemory(
       blockId: BlockId,
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
     val currentUnrollMemory = memoryStore.currentUnrollMemory
     val maxNumBytesToFree = math.max(0, maxMemoryToEvictForUnroll - currentUnrollMemory)
     val numBytesToFree = math.min(numBytes, maxNumBytesToFree)
@@ -108,71 +106,16 @@ private[spark] class StaticMemoryManager(
       blockId: BlockId,
       numBytesToAcquire: Long,
       numBytesToFree: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
-    // Note: Keep this outside synchronized block to avoid potential deadlocks!
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    assert(numBytesToAcquire >= 0)
+    assert(numBytesToFree >= 0)
     memoryStore.ensureFreeSpace(blockId, numBytesToFree, evictedBlocks)
-    synchronized {
-      assert(_storageMemoryUsed <= maxStorageMemory)
-      val enoughMemory = _storageMemoryUsed + numBytesToAcquire <= maxStorageMemory
-      if (enoughMemory) {
-        _storageMemoryUsed += numBytesToAcquire
-      }
-      enoughMemory
-    }
-  }
-
-  /**
-   * Release N bytes of execution memory.
-   */
-  override def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
-    if (numBytes > _executionMemoryUsed) {
-      logWarning(s"Attempted to release $numBytes bytes of execution " +
-        s"memory when we only have ${_executionMemoryUsed} bytes")
-      _executionMemoryUsed = 0
-    } else {
-      _executionMemoryUsed -= numBytes
-    }
-  }
-
-  /**
-   * Release N bytes of storage memory.
-   */
-  override def releaseStorageMemory(numBytes: Long): Unit = synchronized {
-    if (numBytes > _storageMemoryUsed) {
-      logWarning(s"Attempted to release $numBytes bytes of storage " +
-        s"memory when we only have ${_storageMemoryUsed} bytes")
-      _storageMemoryUsed = 0
-    } else {
-      _storageMemoryUsed -= numBytes
+    assert(_storageMemoryUsed <= maxStorageMemory)
+    val enoughMemory = _storageMemoryUsed + numBytesToAcquire <= maxStorageMemory
+    if (enoughMemory) {
+      _storageMemoryUsed += numBytesToAcquire
     }
-  }
-
-  /**
-   * Release all storage memory acquired.
-   */
-  override def releaseStorageMemory(): Unit = synchronized {
-    _storageMemoryUsed = 0
-  }
-
-  /**
-   * Release N bytes of unroll memory.
-   */
-  override def releaseUnrollMemory(numBytes: Long): Unit = {
-    releaseStorageMemory(numBytes)
-  }
-
-  /**
-   * Amount of execution memory currently in use, in bytes.
-   */
-  override def executionMemoryUsed: Long = synchronized {
-    _executionMemoryUsed
-  }
-
-  /**
-   * Amount of storage memory currently in use, in bytes.
-   */
-  override def storageMemoryUsed: Long = synchronized {
-    _storageMemoryUsed
+    enoughMemory
   }
 
 }
@@ -184,9 +127,10 @@ private[spark] object StaticMemoryManager {
    * Return the total amount of memory available for the storage region, in bytes.
    */
   private def getMaxStorageMemory(conf: SparkConf): Long = {
+    val systemMaxMemory = conf.getLong("spark.testing.memory", Runtime.getRuntime.maxMemory)
     val memoryFraction = conf.getDouble("spark.storage.memoryFraction", 0.6)
     val safetyFraction = conf.getDouble("spark.storage.safetyFraction", 0.9)
-    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
+    (systemMaxMemory * memoryFraction * safetyFraction).toLong
   }
 
 
@@ -194,9 +138,10 @@ private[spark] object StaticMemoryManager {
    * Return the total amount of memory available for the execution region, in bytes.
    */
   private def getMaxExecutionMemory(conf: SparkConf): Long = {
+    val systemMaxMemory = conf.getLong("spark.testing.memory", Runtime.getRuntime.maxMemory)
     val memoryFraction = conf.getDouble("spark.shuffle.memoryFraction", 0.2)
     val safetyFraction = conf.getDouble("spark.shuffle.safetyFraction", 0.8)
-    (Runtime.getRuntime.maxMemory * memoryFraction * safetyFraction).toLong
+    (systemMaxMemory * memoryFraction * safetyFraction).toLong
   }
 
 }
diff --git a/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
new file mode 100644
index 000000000000..5bf78d5b674b
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import scala.collection.mutable
+
+import org.apache.spark.SparkConf
+import org.apache.spark.storage.{BlockStatus, BlockId}
+
+
+/**
+ * A [[MemoryManager]] that enforces a soft boundary between execution and storage such that
+ * either side can borrow memory from the other.
+ *
+ * The region shared between execution and storage is a fraction of the total heap space
+ * configurable through `spark.memory.fraction` (default 0.75). The position of the boundary
+ * within this space is further determined by `spark.memory.storageFraction` (default 0.5).
+ * This means the size of the storage region is 0.75 * 0.5 = 0.375 of the heap space by default.
+ *
+ * Storage can borrow as much execution memory as is free until execution reclaims its space.
+ * When this happens, cached blocks will be evicted from memory until sufficient borrowed
+ * memory is released to satisfy the execution memory request.
+ *
+ * Similarly, execution can borrow as much storage memory as is free. However, execution
+ * memory is *never* evicted by storage due to the complexities involved in implementing this.
+ * The implication is that attempts to cache blocks may fail if execution has already eaten
+ * up most of the storage space, in which case the new blocks will be evicted immediately
+ * according to their respective storage levels.
+ */
+private[spark] class UnifiedMemoryManager(conf: SparkConf, maxMemory: Long) extends MemoryManager {
+
+  def this(conf: SparkConf) {
+    this(conf, UnifiedMemoryManager.getMaxMemory(conf))
+  }
+
+  /**
+   * Size of the storage region, in bytes.
+   *
+   * This region is not statically reserved; execution can borrow from it if necessary.
+   * Cached blocks can be evicted only if actual storage memory usage exceeds this region.
+   */
+  private val storageRegionSize: Long = {
+    (maxMemory * conf.getDouble("spark.memory.storageFraction", 0.5)).toLong
+  }
+
+  /**
+   * Total amount of memory, in bytes, not currently occupied by either execution or storage.
+   */
+  private def totalFreeMemory: Long = synchronized {
+    assert(_executionMemoryUsed <= maxMemory)
+    assert(_storageMemoryUsed <= maxMemory)
+    assert(_executionMemoryUsed + _storageMemoryUsed <= maxMemory)
+    maxMemory - _executionMemoryUsed - _storageMemoryUsed
+  }
+
+  /**
+   * Total available memory for execution, in bytes.
+   * In this model, this is equivalent to the amount of memory not occupied by storage.
+   */
+  override def maxExecutionMemory: Long = synchronized {
+    maxMemory - _storageMemoryUsed
+  }
+
+  /**
+   * Total available memory for storage, in bytes.
+   * In this model, this is equivalent to the amount of memory not occupied by execution.
+   */
+  override def maxStorageMemory: Long = synchronized {
+    maxMemory - _executionMemoryUsed
+  }
+
+  /**
+   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   *
+   * This method evicts blocks only up to the amount of memory borrowed by storage.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return number of bytes successfully granted (<= N).
+   */
+  override def acquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
+    assert(numBytes >= 0)
+    val memoryBorrowedByStorage = math.max(0, _storageMemoryUsed - storageRegionSize)
+    // If there is not enough free memory AND storage has borrowed some execution memory,
+    // then evict as much memory borrowed by storage as needed to grant this request
+    val shouldEvictStorage = totalFreeMemory < numBytes && memoryBorrowedByStorage > 0
+    if (shouldEvictStorage) {
+      val spaceToEnsure = math.min(numBytes, memoryBorrowedByStorage)
+      memoryStore.ensureFreeSpace(spaceToEnsure, evictedBlocks)
+    }
+    val bytesToGrant = math.min(numBytes, totalFreeMemory)
+    _executionMemoryUsed += bytesToGrant
+    bytesToGrant
+  }
+
+  /**
+   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return whether all N bytes were successfully granted.
+   */
+  override def acquireStorageMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    assert(numBytes >= 0)
+    memoryStore.ensureFreeSpace(blockId, numBytes, evictedBlocks)
+    val enoughMemory = totalFreeMemory >= numBytes
+    if (enoughMemory) {
+      _storageMemoryUsed += numBytes
+    }
+    enoughMemory
+  }
+
+}
+
+private object UnifiedMemoryManager {
+
+  /**
+   * Return the total amount of memory shared between execution and storage, in bytes.
+   */
+  private def getMaxMemory(conf: SparkConf): Long = {
+    val systemMaxMemory = conf.getLong("spark.testing.memory", Runtime.getRuntime.maxMemory)
+    val memoryFraction = conf.getDouble("spark.memory.fraction", 0.75)
+    (systemMaxMemory * memoryFraction).toLong
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
index bb64bb3f35df..aaf543ce9232 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
@@ -18,11 +18,13 @@
 package org.apache.spark.shuffle
 
 import scala.collection.mutable
+import scala.collection.mutable.ArrayBuffer
 
 import com.google.common.annotations.VisibleForTesting
 
 import org.apache.spark._
 import org.apache.spark.memory.{StaticMemoryManager, MemoryManager}
+import org.apache.spark.storage.{BlockId, BlockStatus}
 import org.apache.spark.unsafe.array.ByteArrayMethods
 
 /**
@@ -36,8 +38,8 @@ import org.apache.spark.unsafe.array.ByteArrayMethods
  * If there are N tasks, it ensures that each tasks can acquire at least 1 / 2N of the memory
  * before it has to spill, and at most 1 / N. Because N varies dynamically, we keep track of the
  * set of active tasks and redo the calculations of 1 / 2N and 1 / N in waiting tasks whenever
- * this set changes. This is all done by synchronizing access on "this" to mutate state and using
- * wait() and notifyAll() to signal changes.
+ * this set changes. This is all done by synchronizing access to `memoryManager` to mutate state
+ * and using wait() and notifyAll() to signal changes.
  *
  * Use `ShuffleMemoryManager.create()` factory method to create a new instance.
  *
@@ -51,7 +53,6 @@ class ShuffleMemoryManager protected (
   extends Logging {
 
   private val taskMemory = new mutable.HashMap[Long, Long]()  // taskAttemptId -> memory bytes
-  private val maxMemory = memoryManager.maxExecutionMemory
 
   private def currentTaskAttemptId(): Long = {
     // In case this is called on the driver, return an invalid task attempt id.
@@ -65,7 +66,7 @@ class ShuffleMemoryManager protected (
    * total memory pool (where N is the # of active tasks) before it is forced to spill. This can
    * happen if the number of tasks increases but an older task had a lot of memory already.
    */
-  def tryToAcquire(numBytes: Long): Long = synchronized {
+  def tryToAcquire(numBytes: Long): Long = memoryManager.synchronized {
     val taskAttemptId = currentTaskAttemptId()
     assert(numBytes > 0, "invalid number of bytes requested: " + numBytes)
 
@@ -73,15 +74,18 @@ class ShuffleMemoryManager protected (
     // of active tasks, to let other tasks ramp down their memory in calls to tryToAcquire
     if (!taskMemory.contains(taskAttemptId)) {
       taskMemory(taskAttemptId) = 0L
-      notifyAll()  // Will later cause waiting tasks to wake up and check numTasks again
+      // This will later cause waiting tasks to wake up and check numTasks again
+      memoryManager.notifyAll()
     }
 
     // Keep looping until we're either sure that we don't want to grant this request (because this
     // task would have more than 1 / numActiveTasks of the memory) or we have enough free
     // memory to give it (we always let each task get at least 1 / (2 * numActiveTasks)).
+    // TODO: simplify this to limit each task to its own slot
     while (true) {
       val numActiveTasks = taskMemory.keys.size
       val curMem = taskMemory(taskAttemptId)
+      val maxMemory = memoryManager.maxExecutionMemory
       val freeMemory = maxMemory - taskMemory.values.sum
 
       // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
@@ -99,7 +103,7 @@ class ShuffleMemoryManager protected (
         } else {
           logInfo(
             s"TID $taskAttemptId waiting for at least 1/2N of shuffle memory pool to be free")
-          wait()
+          memoryManager.wait()
         }
       } else {
         return acquire(toGrant)
@@ -112,15 +116,23 @@ class ShuffleMemoryManager protected (
    * Acquire N bytes of execution memory from the memory manager for the current task.
    * @return number of bytes actually acquired (<= N).
    */
-  private def acquire(numBytes: Long): Long = synchronized {
+  private def acquire(numBytes: Long): Long = memoryManager.synchronized {
     val taskAttemptId = currentTaskAttemptId()
-    val acquired = memoryManager.acquireExecutionMemory(numBytes)
+    val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+    val acquired = memoryManager.acquireExecutionMemory(numBytes, evictedBlocks)
+    // Register evicted blocks, if any, with the active task metrics
+    // TODO: just do this in `acquireExecutionMemory` (SPARK-10985)
+    Option(TaskContext.get()).foreach { tc =>
+      val metrics = tc.taskMetrics()
+      val lastUpdatedBlocks = metrics.updatedBlocks.getOrElse(Seq[(BlockId, BlockStatus)]())
+      metrics.updatedBlocks = Some(lastUpdatedBlocks ++ evictedBlocks.toSeq)
+    }
     taskMemory(taskAttemptId) += acquired
     acquired
   }
 
   /** Release numBytes bytes for the current task. */
-  def release(numBytes: Long): Unit = synchronized {
+  def release(numBytes: Long): Unit = memoryManager.synchronized {
     val taskAttemptId = currentTaskAttemptId()
     val curMem = taskMemory.getOrElse(taskAttemptId, 0L)
     if (curMem < numBytes) {
@@ -129,20 +141,20 @@ class ShuffleMemoryManager protected (
     }
     taskMemory(taskAttemptId) -= numBytes
     memoryManager.releaseExecutionMemory(numBytes)
-    notifyAll()  // Notify waiters who locked "this" in tryToAcquire that memory has been freed
+    memoryManager.notifyAll() // Notify waiters in tryToAcquire that memory has been freed
   }
 
   /** Release all memory for the current task and mark it as inactive (e.g. when a task ends). */
-  def releaseMemoryForThisTask(): Unit = synchronized {
+  def releaseMemoryForThisTask(): Unit = memoryManager.synchronized {
     val taskAttemptId = currentTaskAttemptId()
     taskMemory.remove(taskAttemptId).foreach { numBytes =>
       memoryManager.releaseExecutionMemory(numBytes)
     }
-    notifyAll()  // Notify waiters who locked "this" in tryToAcquire that memory has been freed
+    memoryManager.notifyAll() // Notify waiters in tryToAcquire that memory has been freed
   }
 
   /** Returns the memory consumption, in bytes, for the current task */
-  def getMemoryConsumptionForThisTask(): Long = synchronized {
+  def getMemoryConsumptionForThisTask(): Long = memoryManager.synchronized {
     val taskAttemptId = currentTaskAttemptId()
     taskMemory.getOrElse(taskAttemptId, 0L)
   }
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index 9f5bd2abbdc5..c374b9376622 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -91,6 +91,10 @@ private[spark] class BlockManager(
   }
   memoryManager.setMemoryStore(memoryStore)
 
+  // Note: depending on the memory manager, `maxStorageMemory` may actually vary over time.
+  // However, since we use this only for reporting and logging, what we actually want here is
+  // the absolute maximum value that `maxStorageMemory` can ever possibly reach. We may need
+  // to revisit whether reporting this value as the "max" is intuitive to the user.
   private val maxMemory = memoryManager.maxStorageMemory
 
   private[spark]
diff --git a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
index 35c57b923c43..4dbac388e098 100644
--- a/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
+++ b/core/src/main/scala/org/apache/spark/storage/MemoryStore.scala
@@ -37,15 +37,14 @@ private case class MemoryEntry(value: Any, size: Long, deserialized: Boolean)
 private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: MemoryManager)
   extends BlockStore(blockManager) {
 
+  // Note: all changes to memory allocations, notably putting blocks, evicting blocks, and
+  // acquiring or releasing unroll memory, must be synchronized on `memoryManager`!
+
   private val conf = blockManager.conf
   private val entries = new LinkedHashMap[BlockId, MemoryEntry](32, 0.75f, true)
-  private val maxMemory = memoryManager.maxStorageMemory
-
-  // Ensure only one thread is putting, and if necessary, dropping blocks at any given time
-  private val accountingLock = new Object
 
   // A mapping from taskAttemptId to amount of memory used for unrolling a block (in bytes)
-  // All accesses of this map are assumed to have manually synchronized on `accountingLock`
+  // All accesses of this map are assumed to have manually synchronized on `memoryManager`
   private val unrollMemoryMap = mutable.HashMap[Long, Long]()
   // Same as `unrollMemoryMap`, but for pending unroll memory as defined below.
   // Pending unroll memory refers to the intermediate memory occupied by a task
@@ -60,6 +59,9 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
   private val unrollMemoryThreshold: Long =
     conf.getLong("spark.storage.unrollMemoryThreshold", 1024 * 1024)
 
+  /** Total amount of memory available for storage, in bytes. */
+  private def maxMemory: Long = memoryManager.maxStorageMemory
+
   if (maxMemory < unrollMemoryThreshold) {
     logWarning(s"Max memory ${Utils.bytesToString(maxMemory)} is less than the initial memory " +
       s"threshold ${Utils.bytesToString(unrollMemoryThreshold)} needed to store a block in " +
@@ -75,7 +77,9 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
    * Amount of storage memory, in bytes, used for caching blocks.
    * This does not include memory used for unrolling.
    */
-  private def blocksMemoryUsed: Long = memoryUsed - currentUnrollMemory
+  private def blocksMemoryUsed: Long = memoryManager.synchronized {
+    memoryUsed - currentUnrollMemory
+  }
 
   override def getSize(blockId: BlockId): Long = {
     entries.synchronized {
@@ -208,7 +212,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
     }
   }
 
-  override def remove(blockId: BlockId): Boolean = {
+  override def remove(blockId: BlockId): Boolean = memoryManager.synchronized {
     val entry = entries.synchronized { entries.remove(blockId) }
     if (entry != null) {
       memoryManager.releaseStorageMemory(entry.size)
@@ -220,11 +224,13 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
     }
   }
 
-  override def clear() {
+  override def clear(): Unit = memoryManager.synchronized {
     entries.synchronized {
       entries.clear()
     }
-    memoryManager.releaseStorageMemory()
+    unrollMemoryMap.clear()
+    pendingUnrollMemoryMap.clear()
+    memoryManager.releaseAllStorageMemory()
     logInfo("MemoryStore cleared")
   }
 
@@ -299,22 +305,23 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
       }
 
     } finally {
-      // If we return an array, the values returned will later be cached in `tryToPut`.
-      // In this case, we should release the memory after we cache the block there.
-      // Otherwise, if we return an iterator, we release the memory reserved here
-      // later when the task finishes.
+      // If we return an array, the values returned here will be cached in `tryToPut` later.
+      // In this case, we should release the memory only after we cache the block there.
       if (keepUnrolling) {
         val taskAttemptId = currentTaskAttemptId()
-        accountingLock.synchronized {
-          // Here, we transfer memory from unroll to pending unroll because we expect to cache this
-          // block in `tryToPut`. We do not release and re-acquire memory from the MemoryManager in
-          // order to avoid race conditions where another component steals the memory that we're
-          // trying to transfer.
+        memoryManager.synchronized {
+          // Since we continue to hold onto the array until we actually cache it, we cannot
+          // release the unroll memory yet. Instead, we transfer it to pending unroll memory
+          // so `tryToPut` can further transfer it to normal storage memory later.
+          // TODO: we can probably express this without pending unroll memory (SPARK-10907)
           val amountToTransferToPending = currentUnrollMemoryForThisTask - previousMemoryReserved
           unrollMemoryMap(taskAttemptId) -= amountToTransferToPending
           pendingUnrollMemoryMap(taskAttemptId) =
             pendingUnrollMemoryMap.getOrElse(taskAttemptId, 0L) + amountToTransferToPending
         }
+      } else {
+        // Otherwise, if we return an iterator, we can only release the unroll memory when
+        // the task finishes since we don't know when the iterator will be consumed.
       }
     }
   }
@@ -343,7 +350,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
    * `value` will be lazily created. If it cannot be put into MemoryStore or disk, `value` won't be
    * created to avoid OOM since it may be a big ByteBuffer.
    *
-   * Synchronize on `accountingLock` to ensure that all the put requests and its associated block
+   * Synchronize on `memoryManager` to ensure that all the put requests and its associated block
    * dropping is done by only on thread at a time. Otherwise while one thread is dropping
    * blocks to free memory for one block, another thread may use up the freed space for
    * another block.
@@ -365,16 +372,13 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
      * for freeing up more space for another block that needs to be put. Only then the actually
      * dropping of blocks (and writing to disk if necessary) can proceed in parallel. */
 
-    accountingLock.synchronized {
+    memoryManager.synchronized {
       // Note: if we have previously unrolled this block successfully, then pending unroll
       // memory should be non-zero. This is the amount that we already reserved during the
       // unrolling process. In this case, we can just reuse this space to cache our block.
-      //
-      // Note: the StaticMemoryManager counts unroll memory as storage memory. Here, the
-      // synchronization on `accountingLock` guarantees that the release of unroll memory and
-      // acquisition of storage memory happens atomically. However, if storage memory is acquired
-      // outside of MemoryStore or if unroll memory is counted as execution memory, then we will
-      // have to revisit this assumption. See SPARK-10983 for more context.
+      // The synchronization on `memoryManager` here guarantees that the release and acquire
+      // happen atomically. This relies on the assumption that all memory acquisitions are
+      // synchronized on the same lock.
       releasePendingUnrollMemoryForThisTask()
       val enoughMemory = memoryManager.acquireStorageMemory(blockId, size, droppedBlocks)
       if (enoughMemory) {
@@ -401,34 +405,62 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
     }
   }
 
+  /**
+   * Try to free up a given amount of space by evicting existing blocks.
+   *
+   * @param space the amount of memory to free, in bytes
+   * @param droppedBlocks a holder for blocks evicted in the process
+   * @return whether the requested free space is freed.
+   */
+  private[spark] def ensureFreeSpace(
+      space: Long,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    ensureFreeSpace(None, space, droppedBlocks)
+  }
+
+  /**
+   * Try to free up a given amount of space to store a block by evicting existing ones.
+   *
+   * @param space the amount of memory to free, in bytes
+   * @param droppedBlocks a holder for blocks evicted in the process
+   * @return whether the requested free space is freed.
+   */
+  private[spark] def ensureFreeSpace(
+      blockId: BlockId,
+      space: Long,
+      droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
+    ensureFreeSpace(Some(blockId), space, droppedBlocks)
+  }
+
   /**
    * Try to free up a given amount of space to store a particular block, but can fail if
    * either the block is bigger than our memory or it would require replacing another block
    * from the same RDD (which leads to a wasteful cyclic replacement pattern for RDDs that
    * don't fit into memory that we want to avoid).
    *
-   * @param blockId the ID of the block we are freeing space for
+   * @param blockId the ID of the block we are freeing space for, if any
    * @param space the size of this block
    * @param droppedBlocks a holder for blocks evicted in the process
-   * @return whether there is enough free space.
+   * @return whether the requested free space is freed.
    */
-  private[spark] def ensureFreeSpace(
-      blockId: BlockId,
+  private def ensureFreeSpace(
+      blockId: Option[BlockId],
       space: Long,
       droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
-    accountingLock.synchronized {
+    memoryManager.synchronized {
       val freeMemory = maxMemory - memoryUsed
-      val rddToAdd = getRddId(blockId)
+      val rddToAdd = blockId.flatMap(getRddId)
       val selectedBlocks = new ArrayBuffer[BlockId]
       var selectedMemory = 0L
 
-      logInfo(s"Ensuring $space bytes of free space for block $blockId " +
+      logInfo(s"Ensuring $space bytes of free space " +
+        blockId.map { id => s"for block $id" }.getOrElse("") +
         s"(free: $freeMemory, max: $maxMemory)")
 
       // Fail fast if the block simply won't fit
       if (space > maxMemory) {
-        logInfo(s"Will not store $blockId as the required space " +
-          s"($space bytes) than our memory limit ($maxMemory bytes)")
+        logInfo("Will not " + blockId.map { id => s"store $id" }.getOrElse("free memory") +
+          s" as the required space ($space bytes) exceeds our memory limit ($maxMemory bytes)")
         return false
       }
 
@@ -471,8 +503,10 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
         }
         true
       } else {
-        logInfo(s"Will not store $blockId as it would require dropping another block " +
-          "from the same RDD")
+        blockId.foreach { id =>
+          logInfo(s"Will not store $id as it would require dropping another block " +
+            "from the same RDD")
+        }
         false
       }
     }
@@ -495,8 +529,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
       blockId: BlockId,
       memory: Long,
       droppedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = {
-    accountingLock.synchronized {
-      // Note: all acquisitions of unroll memory must be synchronized on `accountingLock`
+    memoryManager.synchronized {
       val success = memoryManager.acquireUnrollMemory(blockId, memory, droppedBlocks)
       if (success) {
         val taskAttemptId = currentTaskAttemptId()
@@ -512,7 +545,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
    */
   def releaseUnrollMemoryForThisTask(memory: Long = Long.MaxValue): Unit = {
     val taskAttemptId = currentTaskAttemptId()
-    accountingLock.synchronized {
+    memoryManager.synchronized {
       if (unrollMemoryMap.contains(taskAttemptId)) {
         val memoryToRelease = math.min(memory, unrollMemoryMap(taskAttemptId))
         if (memoryToRelease > 0) {
@@ -531,7 +564,7 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
    */
   def releasePendingUnrollMemoryForThisTask(memory: Long = Long.MaxValue): Unit = {
     val taskAttemptId = currentTaskAttemptId()
-    accountingLock.synchronized {
+    memoryManager.synchronized {
       if (pendingUnrollMemoryMap.contains(taskAttemptId)) {
         val memoryToRelease = math.min(memory, pendingUnrollMemoryMap(taskAttemptId))
         if (memoryToRelease > 0) {
@@ -548,21 +581,21 @@ private[spark] class MemoryStore(blockManager: BlockManager, memoryManager: Memo
   /**
    * Return the amount of memory currently occupied for unrolling blocks across all tasks.
    */
-  def currentUnrollMemory: Long = accountingLock.synchronized {
+  def currentUnrollMemory: Long = memoryManager.synchronized {
     unrollMemoryMap.values.sum + pendingUnrollMemoryMap.values.sum
   }
 
   /**
    * Return the amount of memory currently occupied for unrolling blocks by this task.
    */
-  def currentUnrollMemoryForThisTask: Long = accountingLock.synchronized {
+  def currentUnrollMemoryForThisTask: Long = memoryManager.synchronized {
     unrollMemoryMap.getOrElse(currentTaskAttemptId(), 0L)
   }
 
   /**
    * Return the number of tasks currently unrolling blocks.
    */
-  private def numTasksUnrolling: Int = accountingLock.synchronized { unrollMemoryMap.keys.size }
+  private def numTasksUnrolling: Int = memoryManager.synchronized { unrollMemoryMap.keys.size }
 
   /**
    * Log information about current memory usage.
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
index 29c5732f5a8c..6a96b5dc1268 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
@@ -48,16 +48,6 @@ import org.apache.spark.executor.ShuffleWriteMetrics
  * However, if the spill threshold is too low, we spill frequently and incur unnecessary disk
  * writes. This may lead to a performance regression compared to the normal case of using the
  * non-spilling AppendOnlyMap.
- *
- * Two parameters control the memory threshold:
- *
- *   `spark.shuffle.memoryFraction` specifies the collective amount of memory used for storing
- *   these maps as a fraction of the executor's total memory. Since each concurrently running
- *   task maintains one map, the actual threshold for each map is this quantity divided by the
- *   number of running tasks.
- *
- *   `spark.shuffle.safetyFraction` specifies an additional margin of safety as a fraction of
- *   this threshold, in case map size estimation is not sufficiently accurate.
  */
 @DeveloperApi
 class ExternalAppendOnlyMap[K, V, C](
diff --git a/core/src/test/scala/org/apache/spark/DistributedSuite.scala b/core/src/test/scala/org/apache/spark/DistributedSuite.scala
index 600c1403b034..34a4bb968e73 100644
--- a/core/src/test/scala/org/apache/spark/DistributedSuite.scala
+++ b/core/src/test/scala/org/apache/spark/DistributedSuite.scala
@@ -213,11 +213,8 @@ class DistributedSuite extends SparkFunSuite with Matchers with LocalSparkContex
   }
 
   test("compute when only some partitions fit in memory") {
-    val conf = new SparkConf().set("spark.storage.memoryFraction", "0.01")
-    sc = new SparkContext(clusterUrl, "test", conf)
-    // data will be 4 million * 4 bytes = 16 MB in size, but our memoryFraction set the cache
-    // to only 5 MB (0.01 of 512 MB), so not all of it will fit in memory; we use 20 partitions
-    // to make sure that *some* of them do fit though
+    sc = new SparkContext(clusterUrl, "test", new SparkConf)
+    // TODO: verify that only a subset of partitions fit in memory (SPARK-11078)
     val data = sc.parallelize(1 to 4000000, 20).persist(StorageLevel.MEMORY_ONLY_SER)
     assert(data.count() === 4000000)
     assert(data.count() === 4000000)
diff --git a/core/src/test/scala/org/apache/spark/ShuffleSuite.scala b/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
index d91b799ecfc0..4a0877d86f2c 100644
--- a/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
@@ -247,11 +247,13 @@ abstract class ShuffleSuite extends SparkFunSuite with Matchers with LocalSparkC
         .setMaster("local")
         .set("spark.shuffle.spill.compress", shuffleSpillCompress.toString)
         .set("spark.shuffle.compress", shuffleCompress.toString)
-        .set("spark.shuffle.memoryFraction", "0.001")
       resetSparkContext()
       sc = new SparkContext(myConf)
+      val diskBlockManager = sc.env.blockManager.diskBlockManager
       try {
-        sc.parallelize(0 until 100000).map(i => (i / 4, i)).groupByKey().collect()
+        assert(diskBlockManager.getAllFiles().isEmpty)
+        sc.parallelize(0 until 10).map(i => (i / 4, i)).groupByKey().collect()
+        assert(diskBlockManager.getAllFiles().nonEmpty)
       } catch {
         case e: Exception =>
           val errMsg = s"Failed with spark.shuffle.spill.compress=$shuffleSpillCompress," +
diff --git a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
new file mode 100644
index 000000000000..36e456631071
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
@@ -0,0 +1,133 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import java.util.concurrent.atomic.AtomicLong
+
+import org.mockito.Matchers.{any, anyLong}
+import org.mockito.Mockito.{mock, when}
+import org.mockito.invocation.InvocationOnMock
+import org.mockito.stubbing.Answer
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.storage.MemoryStore
+
+
+/**
+ * Helper trait for sharing code among [[MemoryManager]] tests.
+ */
+private[memory] trait MemoryManagerSuite extends SparkFunSuite {
+
+  import MemoryManagerSuite.DEFAULT_ENSURE_FREE_SPACE_CALLED
+
+  // Note: Mockito's verify mechanism does not provide a way to reset method call counts
+  // without also resetting stubbed methods. Since our test code relies on the latter,
+  // we need to use our own variable to track invocations of `ensureFreeSpace`.
+
+  /**
+   * The amount of free space requested in the last call to [[MemoryStore.ensureFreeSpace]]
+   *
+   * This set whenever [[MemoryStore.ensureFreeSpace]] is called, and cleared when the test
+   * code makes explicit assertions on this variable through [[assertEnsureFreeSpaceCalled]].
+   */
+  private val ensureFreeSpaceCalled = new AtomicLong(DEFAULT_ENSURE_FREE_SPACE_CALLED)
+
+  /**
+   * Make a mocked [[MemoryStore]] whose [[MemoryStore.ensureFreeSpace]] method is stubbed.
+   *
+   * This allows our test code to release storage memory when [[MemoryStore.ensureFreeSpace]]
+   * is called without relying on [[org.apache.spark.storage.BlockManager]] and all of its
+   * dependencies.
+   */
+  protected def makeMemoryStore(mm: MemoryManager): MemoryStore = {
+    val ms = mock(classOf[MemoryStore])
+    when(ms.ensureFreeSpace(anyLong(), any())).thenAnswer(ensureFreeSpaceAnswer(mm, 0))
+    when(ms.ensureFreeSpace(any(), anyLong(), any())).thenAnswer(ensureFreeSpaceAnswer(mm, 1))
+    mm.setMemoryStore(ms)
+    ms
+  }
+
+  /**
+   * Make an [[Answer]] that stubs [[MemoryStore.ensureFreeSpace]] with the right arguments.
+   */
+  private def ensureFreeSpaceAnswer(mm: MemoryManager, numBytesPos: Int): Answer[Boolean] = {
+    new Answer[Boolean] {
+      override def answer(invocation: InvocationOnMock): Boolean = {
+        val args = invocation.getArguments
+        require(args.size > numBytesPos, s"bad test: expected >$numBytesPos arguments " +
+          s"in ensureFreeSpace, found ${args.size}")
+        require(args(numBytesPos).isInstanceOf[Long], s"bad test: expected ensureFreeSpace " +
+          s"argument at index $numBytesPos to be a Long: ${args.mkString(", ")}")
+        val numBytes = args(numBytesPos).asInstanceOf[Long]
+        mockEnsureFreeSpace(mm, numBytes)
+      }
+    }
+  }
+
+  /**
+   * Simulate the part of [[MemoryStore.ensureFreeSpace]] that releases storage memory.
+   *
+   * This is a significant simplification of the real method, which actually drops existing
+   * blocks based on the size of each block. Instead, here we simply release as many bytes
+   * as needed to ensure the requested amount of free space. This allows us to set up the
+   * test without relying on the [[org.apache.spark.storage.BlockManager]], which brings in
+   * many other dependencies.
+   *
+   * Every call to this method will set a global variable, [[ensureFreeSpaceCalled]], that
+   * records the number of bytes this is called with. This variable is expected to be cleared
+   * by the test code later through [[assertEnsureFreeSpaceCalled]].
+   */
+  private def mockEnsureFreeSpace(mm: MemoryManager, numBytes: Long): Boolean = mm.synchronized {
+    require(ensureFreeSpaceCalled.get() === DEFAULT_ENSURE_FREE_SPACE_CALLED,
+      "bad test: ensure free space variable was not reset")
+    // Record the number of bytes we freed this call
+    ensureFreeSpaceCalled.set(numBytes)
+    if (numBytes <= mm.maxStorageMemory) {
+      def freeMemory = mm.maxStorageMemory - mm.storageMemoryUsed
+      val spaceToRelease = numBytes - freeMemory
+      if (spaceToRelease > 0) {
+        mm.releaseStorageMemory(spaceToRelease)
+      }
+      freeMemory >= numBytes
+    } else {
+      // We attempted to free more bytes than our max allowable memory
+      false
+    }
+  }
+
+  /**
+   * Assert that [[MemoryStore.ensureFreeSpace]] is called with the given parameters.
+   */
+  protected def assertEnsureFreeSpaceCalled(ms: MemoryStore, numBytes: Long): Unit = {
+    assert(ensureFreeSpaceCalled.get() === numBytes,
+      s"expected ensure free space to be called with $numBytes")
+    ensureFreeSpaceCalled.set(DEFAULT_ENSURE_FREE_SPACE_CALLED)
+  }
+
+  /**
+   * Assert that [[MemoryStore.ensureFreeSpace]] is NOT called.
+   */
+  protected def assertEnsureFreeSpaceNotCalled[T](ms: MemoryStore): Unit = {
+    assert(ensureFreeSpaceCalled.get() === DEFAULT_ENSURE_FREE_SPACE_CALLED,
+      "ensure free space should not have been called!")
+  }
+}
+
+private object MemoryManagerSuite {
+  private val DEFAULT_ENSURE_FREE_SPACE_CALLED = -1L
+}
diff --git a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
index c436a8b5c9f8..6cae1f871e24 100644
--- a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
@@ -19,32 +19,44 @@ package org.apache.spark.memory
 
 import scala.collection.mutable.ArrayBuffer
 
-import org.mockito.Mockito.{mock, reset, verify, when}
-import org.mockito.Matchers.{any, eq => meq}
+import org.mockito.Mockito.when
 
+import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, TestBlockId}
-import org.apache.spark.{SparkConf, SparkFunSuite}
 
 
-class StaticMemoryManagerSuite extends SparkFunSuite {
+class StaticMemoryManagerSuite extends MemoryManagerSuite {
   private val conf = new SparkConf().set("spark.storage.unrollFraction", "0.4")
+  private val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+
+  /**
+   * Make a [[StaticMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
+   */
+  private def makeThings(
+      maxExecutionMem: Long,
+      maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
+    val mm = new StaticMemoryManager(
+      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem)
+    val ms = makeMemoryStore(mm)
+    (mm, ms)
+  }
 
   test("basic execution memory") {
     val maxExecutionMem = 1000L
     val (mm, _) = makeThings(maxExecutionMem, Long.MaxValue)
     assert(mm.executionMemoryUsed === 0L)
-    assert(mm.acquireExecutionMemory(10L) === 10L)
+    assert(mm.acquireExecutionMemory(10L, evictedBlocks) === 10L)
     assert(mm.executionMemoryUsed === 10L)
-    assert(mm.acquireExecutionMemory(100L) === 100L)
+    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
     // Acquire up to the max
-    assert(mm.acquireExecutionMemory(1000L) === 890L)
+    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 890L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
-    assert(mm.acquireExecutionMemory(1L) === 0L)
+    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 0L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
     mm.releaseExecutionMemory(800L)
     assert(mm.executionMemoryUsed === 200L)
     // Acquire after release
-    assert(mm.acquireExecutionMemory(1L) === 1L)
+    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 1L)
     assert(mm.executionMemoryUsed === 201L)
     // Release beyond what was acquired
     mm.releaseExecutionMemory(maxExecutionMem)
@@ -54,37 +66,36 @@ class StaticMemoryManagerSuite extends SparkFunSuite {
   test("basic storage memory") {
     val maxStorageMem = 1000L
     val dummyBlock = TestBlockId("you can see the world you brought to live")
-    val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
     val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.acquireStorageMemory(dummyBlock, 10L, evictedBlocks))
     // `ensureFreeSpace` should be called with the number of bytes requested
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 10L)
+    assertEnsureFreeSpaceCalled(ms, 10L)
     assert(mm.storageMemoryUsed === 10L)
-    assert(evictedBlocks.isEmpty)
     assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+    assertEnsureFreeSpaceCalled(ms, 100L)
     assert(mm.storageMemoryUsed === 110L)
-    // Acquire up to the max, not granted
-    assert(!mm.acquireStorageMemory(dummyBlock, 1000L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1000L)
+    // Acquire more than the max, not granted
+    assert(!mm.acquireStorageMemory(dummyBlock, maxStorageMem + 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, maxStorageMem + 1L)
     assert(mm.storageMemoryUsed === 110L)
-    assert(mm.acquireStorageMemory(dummyBlock, 890L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 890L)
+    // Acquire up to the max, requests after this are still granted due to LRU eviction
+    assert(mm.acquireStorageMemory(dummyBlock, maxStorageMem, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1000L)
     assert(mm.storageMemoryUsed === 1000L)
-    assert(!mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1L)
     assert(mm.storageMemoryUsed === 1000L)
     mm.releaseStorageMemory(800L)
     assert(mm.storageMemoryUsed === 200L)
     // Acquire after release
     assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assertEnsureFreeSpaceCalled(ms, 1L)
     assert(mm.storageMemoryUsed === 201L)
-    mm.releaseStorageMemory()
+    mm.releaseAllStorageMemory()
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 1L)
+    assertEnsureFreeSpaceCalled(ms, 1L)
     assert(mm.storageMemoryUsed === 1L)
     // Release beyond what was acquired
     mm.releaseStorageMemory(100L)
@@ -95,18 +106,17 @@ class StaticMemoryManagerSuite extends SparkFunSuite {
     val maxExecutionMem = 200L
     val maxStorageMem = 1000L
     val dummyBlock = TestBlockId("ain't nobody love like you do")
-    val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
     val (mm, ms) = makeThings(maxExecutionMem, maxStorageMem)
     // Only execution memory should increase
-    assert(mm.acquireExecutionMemory(100L) === 100L)
+    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 100L)
-    assert(mm.acquireExecutionMemory(1000L) === 100L)
+    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 200L)
     // Only storage memory should increase
-    assert(mm.acquireStorageMemory(dummyBlock, 50L, dummyBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 50L)
+    assert(mm.acquireStorageMemory(dummyBlock, 50L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 50L)
     assert(mm.storageMemoryUsed === 50L)
     assert(mm.executionMemoryUsed === 200L)
     // Only execution memory should be released
@@ -114,7 +124,7 @@ class StaticMemoryManagerSuite extends SparkFunSuite {
     assert(mm.storageMemoryUsed === 50L)
     assert(mm.executionMemoryUsed === 67L)
     // Only storage memory should be released
-    mm.releaseStorageMemory()
+    mm.releaseAllStorageMemory()
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 67L)
   }
@@ -122,51 +132,26 @@ class StaticMemoryManagerSuite extends SparkFunSuite {
   test("unroll memory") {
     val maxStorageMem = 1000L
     val dummyBlock = TestBlockId("lonely water")
-    val dummyBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
     val (mm, ms) = makeThings(Long.MaxValue, maxStorageMem)
-    assert(mm.acquireUnrollMemory(dummyBlock, 100L, dummyBlocks))
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 100L)
+    assert(mm.acquireUnrollMemory(dummyBlock, 100L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 100L)
     assert(mm.storageMemoryUsed === 100L)
     mm.releaseUnrollMemory(40L)
     assert(mm.storageMemoryUsed === 60L)
     when(ms.currentUnrollMemory).thenReturn(60L)
-    assert(mm.acquireUnrollMemory(dummyBlock, 500L, dummyBlocks))
+    assert(mm.acquireUnrollMemory(dummyBlock, 500L, evictedBlocks))
     // `spark.storage.unrollFraction` is 0.4, so the max unroll space is 400 bytes.
     // Since we already occupy 60 bytes, we will try to ensure only 400 - 60 = 340 bytes.
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 340L)
+    assertEnsureFreeSpaceCalled(ms, 340L)
     assert(mm.storageMemoryUsed === 560L)
     when(ms.currentUnrollMemory).thenReturn(560L)
-    assert(!mm.acquireUnrollMemory(dummyBlock, 800L, dummyBlocks))
+    assert(!mm.acquireUnrollMemory(dummyBlock, 800L, evictedBlocks))
     assert(mm.storageMemoryUsed === 560L)
     // We already have 560 bytes > the max unroll space of 400 bytes, so no bytes are freed
-    assertEnsureFreeSpaceCalled(ms, dummyBlock, 0L)
+    assertEnsureFreeSpaceCalled(ms, 0L)
     // Release beyond what was acquired
     mm.releaseUnrollMemory(maxStorageMem)
     assert(mm.storageMemoryUsed === 0L)
   }
 
-  /**
-   * Make a [[StaticMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
-   */
-  private def makeThings(
-      maxExecutionMem: Long,
-      maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
-    val mm = new StaticMemoryManager(
-      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem)
-    val ms = mock(classOf[MemoryStore])
-    mm.setMemoryStore(ms)
-    (mm, ms)
-  }
-
-  /**
-   * Assert that [[MemoryStore.ensureFreeSpace]] is called with the given parameters.
-   */
-  private def assertEnsureFreeSpaceCalled(
-      ms: MemoryStore,
-      blockId: BlockId,
-      numBytes: Long): Unit = {
-    verify(ms).ensureFreeSpace(meq(blockId), meq(numBytes: java.lang.Long), any())
-    reset(ms)
-  }
-
 }
diff --git a/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
new file mode 100644
index 000000000000..e7baa50dc2cd
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
@@ -0,0 +1,208 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.scalatest.PrivateMethodTester
+
+import org.apache.spark.SparkConf
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, TestBlockId}
+
+
+class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTester {
+  private val conf = new SparkConf().set("spark.memory.storageFraction", "0.5")
+  private val dummyBlock = TestBlockId("--")
+  private val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+
+  /**
+   * Make a [[UnifiedMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
+   */
+  private def makeThings(maxMemory: Long): (UnifiedMemoryManager, MemoryStore) = {
+    val mm = new UnifiedMemoryManager(conf, maxMemory)
+    val ms = makeMemoryStore(mm)
+    (mm, ms)
+  }
+
+  private def getStorageRegionSize(mm: UnifiedMemoryManager): Long = {
+    mm invokePrivate PrivateMethod[Long]('storageRegionSize)()
+  }
+
+  test("storage region size") {
+    val maxMemory = 1000L
+    val (mm, _) = makeThings(maxMemory)
+    val storageFraction = conf.get("spark.memory.storageFraction").toDouble
+    val expectedStorageRegionSize = maxMemory * storageFraction
+    val actualStorageRegionSize = getStorageRegionSize(mm)
+    assert(expectedStorageRegionSize === actualStorageRegionSize)
+  }
+
+  test("basic execution memory") {
+    val maxMemory = 1000L
+    val (mm, _) = makeThings(maxMemory)
+    assert(mm.executionMemoryUsed === 0L)
+    assert(mm.acquireExecutionMemory(10L, evictedBlocks) === 10L)
+    assert(mm.executionMemoryUsed === 10L)
+    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    // Acquire up to the max
+    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 890L)
+    assert(mm.executionMemoryUsed === maxMemory)
+    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 0L)
+    assert(mm.executionMemoryUsed === maxMemory)
+    mm.releaseExecutionMemory(800L)
+    assert(mm.executionMemoryUsed === 200L)
+    // Acquire after release
+    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 1L)
+    assert(mm.executionMemoryUsed === 201L)
+    // Release beyond what was acquired
+    mm.releaseExecutionMemory(maxMemory)
+    assert(mm.executionMemoryUsed === 0L)
+  }
+
+  test("basic storage memory") {
+    val maxMemory = 1000L
+    val (mm, ms) = makeThings(maxMemory)
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.acquireStorageMemory(dummyBlock, 10L, evictedBlocks))
+    // `ensureFreeSpace` should be called with the number of bytes requested
+    assertEnsureFreeSpaceCalled(ms, 10L)
+    assert(mm.storageMemoryUsed === 10L)
+    assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 100L)
+    assert(mm.storageMemoryUsed === 110L)
+    // Acquire more than the max, not granted
+    assert(!mm.acquireStorageMemory(dummyBlock, maxMemory + 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, maxMemory + 1L)
+    assert(mm.storageMemoryUsed === 110L)
+    // Acquire up to the max, requests after this are still granted due to LRU eviction
+    assert(mm.acquireStorageMemory(dummyBlock, maxMemory, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1000L)
+    assert(mm.storageMemoryUsed === 1000L)
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1L)
+    assert(mm.storageMemoryUsed === 1000L)
+    mm.releaseStorageMemory(800L)
+    assert(mm.storageMemoryUsed === 200L)
+    // Acquire after release
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1L)
+    assert(mm.storageMemoryUsed === 201L)
+    mm.releaseAllStorageMemory()
+    assert(mm.storageMemoryUsed === 0L)
+    assert(mm.acquireStorageMemory(dummyBlock, 1L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 1L)
+    assert(mm.storageMemoryUsed === 1L)
+    // Release beyond what was acquired
+    mm.releaseStorageMemory(100L)
+    assert(mm.storageMemoryUsed === 0L)
+  }
+
+  test("execution evicts storage") {
+    val maxMemory = 1000L
+    val (mm, ms) = makeThings(maxMemory)
+    // First, ensure the test classes are set up as expected
+    val expectedStorageRegionSize = 500L
+    val expectedExecutionRegionSize = 500L
+    val storageRegionSize = getStorageRegionSize(mm)
+    val executionRegionSize = maxMemory - expectedStorageRegionSize
+    require(storageRegionSize === expectedStorageRegionSize,
+      "bad test: storage region size is unexpected")
+    require(executionRegionSize === expectedExecutionRegionSize,
+      "bad test: storage region size is unexpected")
+    // Acquire enough storage memory to exceed the storage region
+    assert(mm.acquireStorageMemory(dummyBlock, 750L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 750L)
+    assert(mm.executionMemoryUsed === 0L)
+    assert(mm.storageMemoryUsed === 750L)
+    require(mm.storageMemoryUsed > storageRegionSize,
+      s"bad test: storage memory used should exceed the storage region")
+    // Execution needs to request 250 bytes to evict storage memory
+    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.executionMemoryUsed === 100L)
+    assert(mm.storageMemoryUsed === 750L)
+    assertEnsureFreeSpaceNotCalled(ms)
+    // Execution wants 200 bytes but only 150 are free, so storage is evicted
+    assert(mm.acquireExecutionMemory(200L, evictedBlocks) === 200L)
+    assertEnsureFreeSpaceCalled(ms, 200L)
+    assert(mm.executionMemoryUsed === 300L)
+    mm.releaseAllStorageMemory()
+    require(mm.executionMemoryUsed < executionRegionSize,
+      s"bad test: execution memory used should be within the execution region")
+    require(mm.storageMemoryUsed === 0, "bad test: all storage memory should have been released")
+    // Acquire some storage memory again, but this time keep it within the storage region
+    assert(mm.acquireStorageMemory(dummyBlock, 400L, evictedBlocks))
+    assertEnsureFreeSpaceCalled(ms, 400L)
+    require(mm.storageMemoryUsed < storageRegionSize,
+      s"bad test: storage memory used should be within the storage region")
+    // Execution cannot evict storage because the latter is within the storage fraction,
+    // so grant only what's remaining without evicting anything, i.e. 1000 - 300 - 400 = 300
+    assert(mm.acquireExecutionMemory(400L, evictedBlocks) === 300L)
+    assert(mm.executionMemoryUsed === 600L)
+    assert(mm.storageMemoryUsed === 400L)
+    assertEnsureFreeSpaceNotCalled(ms)
+  }
+
+  test("storage does not evict execution") {
+    val maxMemory = 1000L
+    val (mm, ms) = makeThings(maxMemory)
+    // First, ensure the test classes are set up as expected
+    val expectedStorageRegionSize = 500L
+    val expectedExecutionRegionSize = 500L
+    val storageRegionSize = getStorageRegionSize(mm)
+    val executionRegionSize = maxMemory - expectedStorageRegionSize
+    require(storageRegionSize === expectedStorageRegionSize,
+      "bad test: storage region size is unexpected")
+    require(executionRegionSize === expectedExecutionRegionSize,
+      "bad test: storage region size is unexpected")
+    // Acquire enough execution memory to exceed the execution region
+    assert(mm.acquireExecutionMemory(800L, evictedBlocks) === 800L)
+    assert(mm.executionMemoryUsed === 800L)
+    assert(mm.storageMemoryUsed === 0L)
+    assertEnsureFreeSpaceNotCalled(ms)
+    require(mm.executionMemoryUsed > executionRegionSize,
+      s"bad test: execution memory used should exceed the execution region")
+    // Storage should not be able to evict execution
+    assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
+    assert(mm.executionMemoryUsed === 800L)
+    assert(mm.storageMemoryUsed === 100L)
+    assertEnsureFreeSpaceCalled(ms, 100L)
+    assert(!mm.acquireStorageMemory(dummyBlock, 250L, evictedBlocks))
+    assert(mm.executionMemoryUsed === 800L)
+    assert(mm.storageMemoryUsed === 100L)
+    assertEnsureFreeSpaceCalled(ms, 250L)
+    mm.releaseExecutionMemory(maxMemory)
+    mm.releaseStorageMemory(maxMemory)
+    // Acquire some execution memory again, but this time keep it within the execution region
+    assert(mm.acquireExecutionMemory(200L, evictedBlocks) === 200L)
+    assert(mm.executionMemoryUsed === 200L)
+    assert(mm.storageMemoryUsed === 0L)
+    assertEnsureFreeSpaceNotCalled(ms)
+    require(mm.executionMemoryUsed < executionRegionSize,
+      s"bad test: execution memory used should be within the execution region")
+    // Storage should still not be able to evict execution
+    assert(mm.acquireStorageMemory(dummyBlock, 750L, evictedBlocks))
+    assert(mm.executionMemoryUsed === 200L)
+    assert(mm.storageMemoryUsed === 750L)
+    assertEnsureFreeSpaceCalled(ms, 750L)
+    assert(!mm.acquireStorageMemory(dummyBlock, 850L, evictedBlocks))
+    assert(mm.executionMemoryUsed === 200L)
+    assert(mm.storageMemoryUsed === 750L)
+    assertEnsureFreeSpaceCalled(ms, 850L)
+  }
+
+}
diff --git a/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
index 6d45b1a101be..5877aa042d4a 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
@@ -24,7 +24,8 @@ import org.mockito.Mockito._
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.time.SpanSugar._
 
-import org.apache.spark.{SparkConf, SparkFunSuite, TaskContext}
+import org.apache.spark.{SparkFunSuite, TaskContext}
+import org.apache.spark.executor.TaskMetrics
 
 class ShuffleMemoryManagerSuite extends SparkFunSuite with Timeouts {
 
@@ -37,7 +38,9 @@ class ShuffleMemoryManagerSuite extends SparkFunSuite with Timeouts {
         try {
           val taskAttemptId = nextTaskAttemptId.getAndIncrement
           val mockTaskContext = mock(classOf[TaskContext], RETURNS_SMART_NULLS)
+          val taskMetrics = new TaskMetrics
           when(mockTaskContext.taskAttemptId()).thenReturn(taskAttemptId)
+          when(mockTaskContext.taskMetrics()).thenReturn(taskMetrics)
           TaskContext.setTaskContext(mockTaskContext)
           body
         } finally {
diff --git a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
index 6351539e91e9..259020a2ddc3 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
@@ -36,9 +36,6 @@ class UnsafeShuffleSuite extends ShuffleSuite with BeforeAndAfterAll {
 
   override def beforeAll() {
     conf.set("spark.shuffle.manager", "tungsten-sort")
-    // UnsafeShuffleManager requires at least 128 MB of memory per task in order to be able to sort
-    // shuffle records.
-    conf.set("spark.shuffle.memoryFraction", "0.5")
   }
 
   test("UnsafeShuffleManager properly cleans up files for shuffles that use the new shuffle path") {
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
index 12e9bafcc92c..0a03c32c647a 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
@@ -22,6 +22,8 @@ import scala.collection.mutable.ArrayBuffer
 import org.apache.spark._
 import org.apache.spark.io.CompressionCodec
 
+// TODO: some of these spilling tests probably aren't actually spilling (SPARK-11078)
+
 class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
   private val allCompressionCodecs = CompressionCodec.ALL_COMPRESSION_CODECS
   private def createCombiner[T](i: T) = ArrayBuffer[T](i)
@@ -243,7 +245,6 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
    */
   private def testSimpleSpilling(codec: Option[String] = None): Unit = {
     val conf = createSparkConf(loadDefaults = true, codec)  // Load defaults for Spark home
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     // reduceByKey - should spill ~8 times
@@ -291,7 +292,6 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with hash collisions") {
     val conf = createSparkConf(loadDefaults = true)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[String]
 
@@ -340,7 +340,6 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with many hash collisions") {
     val conf = createSparkConf(loadDefaults = true)
-    conf.set("spark.shuffle.memoryFraction", "0.0001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = new ExternalAppendOnlyMap[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
 
@@ -365,7 +364,6 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with hash collisions using the Int.MaxValue key") {
     val conf = createSparkConf(loadDefaults = true)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[Int]
 
@@ -382,7 +380,6 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with null keys and values") {
     val conf = createSparkConf(loadDefaults = true)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[Int]
 
@@ -401,8 +398,8 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
 
   test("external aggregation updates peak execution memory") {
     val conf = createSparkConf(loadDefaults = false)
-      .set("spark.shuffle.memoryFraction", "0.001")
       .set("spark.shuffle.manager", "hash") // make sure we're not also using ExternalSorter
+      .set("spark.testing.memory", (10 * 1024 * 1024).toString)
     sc = new SparkContext("local", "test", conf)
     // No spilling
     AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external map without spilling") {
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
index bdb0f4d507a7..651c7eaa65ff 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
@@ -24,6 +24,8 @@ import scala.util.Random
 import org.apache.spark._
 import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
 
+// TODO: some of these spilling tests probably aren't actually spilling (SPARK-11078)
+
 class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   private def createSparkConf(loadDefaults: Boolean, kryo: Boolean): SparkConf = {
     val conf = new SparkConf(loadDefaults)
@@ -38,6 +40,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     conf.set("spark.shuffle.sort.bypassMergeThreshold", "0")
     // Ensure that we actually have multiple batches per spill file
     conf.set("spark.shuffle.spill.batchSize", "10")
+    conf.set("spark.testing.memory", "2000000")
     conf
   }
 
@@ -50,7 +53,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def emptyDataStream(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -91,7 +93,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def fewElementsPerPartition(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -140,7 +141,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def emptyPartitionsWithSpilling(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.spill.initialMemoryThreshold", "512")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
@@ -174,7 +174,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def testSpillingInLocalCluster(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
@@ -252,7 +251,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def spillingInLocalClusterWithManyReduceTasks(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local-cluster[2,1,1024]", "test", conf)
 
@@ -323,7 +321,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("cleanup of intermediate files in sorter") {
     val conf = createSparkConf(true, false)  // Load defaults, otherwise SPARK_HOME is not found
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
     val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
@@ -348,7 +345,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("cleanup of intermediate files in sorter if there are errors") {
     val conf = createSparkConf(true, false)  // Load defaults, otherwise SPARK_HOME is not found
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
     val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
@@ -372,7 +368,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("cleanup of intermediate files in shuffle") {
     val conf = createSparkConf(false, false)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
     val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
@@ -387,7 +382,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("cleanup of intermediate files in shuffle with errors") {
     val conf = createSparkConf(false, false)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
     val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
@@ -416,7 +410,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def noPartialAggregationOrSorting(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -438,7 +431,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def partialAggregationWithoutSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -461,7 +453,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def partialAggregationWIthSpillNoOrdering(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -485,7 +476,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def partialAggregationWithSpillWithOrdering(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -512,7 +502,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def sortingWithoutAggregationNoSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -536,7 +525,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   def sortingWithoutAggregationWithSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
     sc = new SparkContext("local", "test", conf)
 
@@ -553,7 +541,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with hash collisions") {
     val conf = createSparkConf(true, false)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
@@ -610,7 +597,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with many hash collisions") {
     val conf = createSparkConf(true, false)
-    conf.set("spark.shuffle.memoryFraction", "0.0001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     val agg = new Aggregator[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
@@ -633,7 +619,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with hash collisions using the Int.MaxValue key") {
     val conf = createSparkConf(true, false)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: Int): ArrayBuffer[Int] = ArrayBuffer[Int](i)
@@ -657,7 +642,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
   test("spilling with null keys and values") {
     val conf = createSparkConf(true, false)
-    conf.set("spark.shuffle.memoryFraction", "0.001")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
@@ -693,7 +677,6 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   private def sortWithoutBreakingSortingContracts(conf: SparkConf) {
-    conf.set("spark.shuffle.memoryFraction", "0.01")
     conf.set("spark.shuffle.manager", "sort")
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
diff --git a/docs/configuration.md b/docs/configuration.md
index 154a3aee6855..771d93be04b0 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -445,17 +445,6 @@ Apart from these, the following properties are also available, and may be useful
     met.
   </td>
 </tr>
-<tr>
-  <td><code>spark.shuffle.memoryFraction</code></td>
-  <td>0.2</td>
-  <td>
-    Fraction of Java heap to use for aggregation and cogroups during shuffles.
-    At any given time, the collective size of
-    all in-memory maps used for shuffles is bounded by this limit, beyond which the contents will
-    begin to spill to disk. If spills are often, consider increasing this value at the expense of
-    <code>spark.storage.memoryFraction</code>.
-  </td>
-</tr>
 <tr>
   <td><code>spark.shuffle.service.enabled</code></td>
   <td>false</td>
@@ -712,6 +701,76 @@ Apart from these, the following properties are also available, and may be useful
 </tr>
 </table>
 
+#### Memory Management
+<table class="table">
+<tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
+<tr>
+  <td><code>spark.memory.fraction</code></td>
+  <td>0.75</td>
+  <td>
+    Fraction of the heap space used for execution and storage. The lower this is, the more
+    frequently spills and cached data eviction occur. The purpose of this config is to set
+    aside memory for internal metadata, user data structures, and imprecise size estimation
+    in the case of sparse, unusually large records.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.memory.storageFraction</code></td>
+  <td>0.5</td>
+  <td>
+    T​he size of the storage region within the space set aside by
+    <code>s​park.memory.fraction</code>. This region is not statically reserved, but dynamically
+    allocated as cache requests come in. ​Cached data may be evicted only if total storage exceeds
+    this region.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.memory.useLegacyMode</code></td>
+  <td>false</td>
+  <td>
+    ​Whether to enable the legacy memory management mode used in Spark 1.5 and before.
+    The legacy mode rigidly partitions the heap space into fixed-size regions,
+    potentially leading to excessive spilling if the application was not tuned.
+    The following deprecated memory fraction configurations are not read unless this is enabled:
+    <code>spark.shuffle.memoryFraction</code><br>
+    <code>spark.storage.memoryFraction</code><br>
+    <code>spark.storage.unrollFraction</code>
+  </td>
+</tr>
+<tr>
+  <td><code>spark.shuffle.memoryFraction</code></td>
+  <td>0.2</td>
+  <td>
+    (deprecated) This is read only if <code>spark.memory.useLegacyMode</code> is enabled.
+    Fraction of Java heap to use for aggregation and cogroups during shuffles.
+    At any given time, the collective size of
+    all in-memory maps used for shuffles is bounded by this limit, beyond which the contents will
+    begin to spill to disk. If spills are often, consider increasing this value at the expense of
+    <code>spark.storage.memoryFraction</code>.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.storage.memoryFraction</code></td>
+  <td>0.6</td>
+  <td>
+    (deprecated) This is read only if <code>spark.memory.useLegacyMode</code> is enabled.
+    Fraction of Java heap to use for Spark's memory cache. This should not be larger than the "old"
+    generation of objects in the JVM, which by default is given 0.6 of the heap, but you can
+    increase it if you configure your own old generation size.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.storage.unrollFraction</code></td>
+  <td>0.2</td>
+  <td>
+    (deprecated) This is read only if <code>spark.memory.useLegacyMode</code> is enabled.
+    Fraction of <code>spark.storage.memoryFraction</code> to use for unrolling blocks in memory.
+    This is dynamically allocated by dropping existing blocks when there is not enough free
+    storage space to unroll the new block in its entirety.
+  </td>
+</tr>
+</table>
+
 #### Execution Behavior
 <table class="table">
 <tr><th>Property Name</th><th>Default</th><th>Meaning</th></tr>
@@ -824,15 +883,6 @@ Apart from these, the following properties are also available, and may be useful
     This setting is ignored for jobs generated through Spark Streaming's StreamingContext, since
     data may need to be rewritten to pre-existing output directories during checkpoint recovery.</td>
 </tr>
-<tr>
-  <td><code>spark.storage.memoryFraction</code></td>
-  <td>0.6</td>
-  <td>
-    Fraction of Java heap to use for Spark's memory cache. This should not be larger than the "old"
-    generation of objects in the JVM, which by default is given 0.6 of the heap, but you can
-    increase it if you configure your own old generation size.
-  </td>
-</tr>
 <tr>
   <td><code>spark.storage.memoryMapThreshold</code></td>
   <td>2m</td>
@@ -842,15 +892,6 @@ Apart from these, the following properties are also available, and may be useful
     mapping has high overhead for blocks close to or below the page size of the operating system.
   </td>
 </tr>
-<tr>
-  <td><code>spark.storage.unrollFraction</code></td>
-  <td>0.2</td>
-  <td>
-    Fraction of <code>spark.storage.memoryFraction</code> to use for unrolling blocks in memory.
-    This is dynamically allocated by dropping existing blocks when there is not enough free
-    storage space to unroll the new block in its entirety.
-  </td>
-</tr>
 <tr>
   <td><code>spark.externalBlockStore.blockManager</code></td>
   <td>org.apache.spark.storage.TachyonBlockManager</td>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
index ff65d7bdf8b9..835f52fa566a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
@@ -57,7 +57,9 @@ class TestShuffleMemoryManager
 }
 
 private class GrantEverythingMemoryManager extends MemoryManager {
-  override def acquireExecutionMemory(numBytes: Long): Long = numBytes
+  override def acquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = numBytes
   override def acquireStorageMemory(
       blockId: BlockId,
       numBytes: Long,
@@ -66,12 +68,6 @@ private class GrantEverythingMemoryManager extends MemoryManager {
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
-  override def releaseExecutionMemory(numBytes: Long): Unit = { }
-  override def releaseStorageMemory(numBytes: Long): Unit = { }
-  override def releaseStorageMemory(): Unit = { }
-  override def releaseUnrollMemory(numBytes: Long): Unit = { }
   override def maxExecutionMemory: Long = Long.MaxValue
   override def maxStorageMemory: Long = Long.MaxValue
-  override def executionMemoryUsed: Long = Long.MaxValue
-  override def storageMemoryUsed: Long = Long.MaxValue
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
index f7d48bc53ebb..75d1fced594c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
@@ -103,7 +103,7 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
       val conf = new SparkConf()
         .set("spark.shuffle.spill.initialMemoryThreshold", "1024")
         .set("spark.shuffle.sort.bypassMergeThreshold", "0")
-        .set("spark.shuffle.memoryFraction", "0.0001")
+        .set("spark.testing.memory", "80000")
 
       sc = new SparkContext("local", "test", conf)
       outputFile = File.createTempFile("test-unsafe-row-serializer-spill", "")

From 0d1b73b78b600420121ea8e58ff659ae8b4feebe Mon Sep 17 00:00:00 2001
From: trystanleftwich <trystan@atscale.com>
Date: Tue, 13 Oct 2015 22:11:08 +0100
Subject: [PATCH 224/896] =?UTF-8?q?[SPARK-11052]=20Spaces=20in=20the=20bui?=
 =?UTF-8?q?ld=20dir=20causes=20failures=20in=20the=20build/mv=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…n script

Author: trystanleftwich <trystan@atscale.com>

Closes #9065 from trystanleftwich/SPARK-11052.
---
 build/mvn            | 10 +++++-----
 make-distribution.sh |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/build/mvn b/build/mvn
index ec0380afad31..7603ea03deb7 100755
--- a/build/mvn
+++ b/build/mvn
@@ -104,8 +104,8 @@ install_scala() {
     "scala-${scala_version}.tgz" \
     "scala-${scala_version}/bin/scala"
 
-  SCALA_COMPILER="$(cd "$(dirname ${scala_bin})/../lib" && pwd)/scala-compiler.jar"
-  SCALA_LIBRARY="$(cd "$(dirname ${scala_bin})/../lib" && pwd)/scala-library.jar"
+  SCALA_COMPILER="$(cd "$(dirname "${scala_bin}")/../lib" && pwd)/scala-compiler.jar"
+  SCALA_LIBRARY="$(cd "$(dirname "${scala_bin}")/../lib" && pwd)/scala-library.jar"
 }
 
 # Setup healthy defaults for the Zinc port if none were provided from
@@ -135,10 +135,10 @@ cd "${_CALLING_DIR}"
 
 # Now that zinc is ensured to be installed, check its status and, if its
 # not running or just installed, start it
-if [ -n "${ZINC_INSTALL_FLAG}" -o -z "`${ZINC_BIN} -status -port ${ZINC_PORT}`" ]; then
+if [ -n "${ZINC_INSTALL_FLAG}" -o -z "`"${ZINC_BIN}" -status -port ${ZINC_PORT}`" ]; then
   export ZINC_OPTS=${ZINC_OPTS:-"$_COMPILE_JVM_OPTS"}
-  ${ZINC_BIN} -shutdown -port ${ZINC_PORT}
-  ${ZINC_BIN} -start -port ${ZINC_PORT} \
+  "${ZINC_BIN}" -shutdown -port ${ZINC_PORT}
+  "${ZINC_BIN}" -start -port ${ZINC_PORT} \
     -scala-compiler "${SCALA_COMPILER}" \
     -scala-library "${SCALA_LIBRARY}" &>/dev/null
 fi
diff --git a/make-distribution.sh b/make-distribution.sh
index 62c0ba6df7d3..24418ace2627 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -121,7 +121,7 @@ if [ $(command -v git) ]; then
 fi
 
 
-if [ ! $(command -v "$MVN") ] ; then
+if [ ! "$(command -v "$MVN")" ] ; then
     echo -e "Could not locate Maven command: '$MVN'."
     echo -e "Specify the Maven command with the --mvn flag"
     exit -1;

From ef72673b234579c161b8cbb6cafc851d9eba1bfb Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 13 Oct 2015 15:09:31 -0700
Subject: [PATCH 225/896] [SPARK-11080] [SQL] Incorporate per-JVM id into
 ExprId to prevent unsafe cross-JVM comparisions

In the current implementation of named expressions' `ExprIds`, we rely on a per-JVM AtomicLong to ensure that expression ids are unique within a JVM. However, these expression ids will not be _globally_ unique. This opens the potential for id collisions if new expression ids happen to be created inside of tasks rather than on the driver.

There are currently a few cases where tasks allocate expression ids, which happen to be safe because those expressions are never compared to expressions created on the driver. In order to guard against the introduction of invalid comparisons between driver-created and executor-created expression ids, this patch extends `ExprId` to incorporate a UUID to identify the JVM that created the id, which prevents collisions.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9093 from JoshRosen/SPARK-11080.
---
 .../catalyst/expressions/namedExpressions.scala   | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 5768c6087db3..8957df0be681 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import java.util.UUID
+
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute
 import org.apache.spark.sql.catalyst.expressions.codegen._
@@ -24,16 +26,23 @@ import org.apache.spark.sql.types._
 
 object NamedExpression {
   private val curId = new java.util.concurrent.atomic.AtomicLong()
-  def newExprId: ExprId = ExprId(curId.getAndIncrement())
+  private[expressions] val jvmId = UUID.randomUUID()
+  def newExprId: ExprId = ExprId(curId.getAndIncrement(), jvmId)
   def unapply(expr: NamedExpression): Option[(String, DataType)] = Some(expr.name, expr.dataType)
 }
 
 /**
- * A globally unique (within this JVM) id for a given named expression.
+ * A globally unique id for a given named expression.
  * Used to identify which attribute output by a relation is being
  * referenced in a subsequent computation.
+ *
+ * The `id` field is unique within a given JVM, while the `uuid` is used to uniquely identify JVMs.
  */
-case class ExprId(id: Long)
+case class ExprId(id: Long, jvmId: UUID)
+
+object ExprId {
+  def apply(id: Long): ExprId = ExprId(id, NamedExpression.jvmId)
+}
 
 /**
  * An [[Expression]] that is named.

From d0482f6af33e976db237405b2a978db1b7c2fd5b Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 13 Oct 2015 15:18:20 -0700
Subject: [PATCH 226/896] [SPARK-10932] [PROJECT INFRA] Port two minor changes
 to release-build.sh from scripts' old repo

Spark's release packaging scripts used to live in a separate repository. Although these scripts are now part of the Spark repo, there are some minor patches made against the old repos that are missing in Spark's copy of the script. This PR ports those changes.

/cc shivaram, who originally submitted these changes against https://github.com/rxin/spark-utils

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8986 from JoshRosen/port-release-build-fixes-from-rxin-repo.
---
 dev/create-release/release-build.sh | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/dev/create-release/release-build.sh b/dev/create-release/release-build.sh
index 9dac43ce5442..cb79e9eba06e 100755
--- a/dev/create-release/release-build.sh
+++ b/dev/create-release/release-build.sh
@@ -70,7 +70,7 @@ GIT_REF=${GIT_REF:-master}
 # Destination directory parent on remote server
 REMOTE_PARENT_DIR=${REMOTE_PARENT_DIR:-/home/$ASF_USERNAME/public_html}
 
-SSH="ssh -o StrictHostKeyChecking=no -i $ASF_RSA_KEY"
+SSH="ssh -o ConnectTimeout=300 -o StrictHostKeyChecking=no -i $ASF_RSA_KEY"
 GPG="gpg --no-tty --batch"
 NEXUS_ROOT=https://repository.apache.org/service/local/staging
 NEXUS_PROFILE=d63f592e7eac0 # Profile for Spark staging uploads
@@ -141,8 +141,12 @@ if [[ "$1" == "package" ]]; then
 
     export ZINC_PORT=$ZINC_PORT
     echo "Creating distribution: $NAME ($FLAGS)"
-    ./make-distribution.sh --name $NAME --tgz $FLAGS -DzincPort=$ZINC_PORT 2>&1 > \
-      ../binary-release-$NAME.log
+
+    # Get maven home set by MVN
+    MVN_HOME=`$MVN -version 2>&1 | grep 'Maven home' | awk '{print $NF}'`
+
+    ./make-distribution.sh --name $NAME --mvn $MVN_HOME/bin/mvn --tgz $FLAGS \
+      -DzincPort=$ZINC_PORT 2>&1 >  ../binary-release-$NAME.log
     cd ..
     cp spark-$SPARK_VERSION-bin-$NAME/spark-$SPARK_VERSION-bin-$NAME.tgz .
 

From 3889b1c7a96da1111946fa63ad69489b83468646 Mon Sep 17 00:00:00 2001
From: vectorijk <jiangkai@gmail.com>
Date: Tue, 13 Oct 2015 15:57:36 -0700
Subject: [PATCH 227/896] [SPARK-11059] [ML] Change range of quantile
 probabilities in AFTSurvivalRegression

Value of the quantile probabilities array should be in the range (0, 1) instead of [0,1]
 in `AFTSurvivalRegression.scala` according to [Discussion] (https://github.com/apache/spark/pull/8926#discussion-diff-40698242)

Author: vectorijk <jiangkai@gmail.com>

Closes #9083 from vectorijk/spark-11059.
---
 .../apache/spark/ml/regression/AFTSurvivalRegression.scala    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index 717caacad30e..ac2c3d825f13 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -59,14 +59,14 @@ private[regression] trait AFTSurvivalRegressionParams extends Params
 
   /**
    * Param for quantile probabilities array.
-   * Values of the quantile probabilities array should be in the range [0, 1]
+   * Values of the quantile probabilities array should be in the range (0, 1)
    * and the array should be non-empty.
    * @group param
    */
   @Since("1.6.0")
   final val quantileProbabilities: DoubleArrayParam = new DoubleArrayParam(this,
     "quantileProbabilities", "quantile probabilities array",
-    (t: Array[Double]) => t.forall(ParamValidators.inRange(0, 1)) && t.length > 0)
+    (t: Array[Double]) => t.forall(ParamValidators.inRange(0, 1, false, false)) && t.length > 0)
 
   /** @group getParam */
   @Since("1.6.0")

From 328d1b3e4bc39cce653342e04f9e08af12dd7ed8 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Tue, 13 Oct 2015 17:09:17 -0700
Subject: [PATCH 228/896] [SPARK-11090] [SQL] Constructor for Product types
 from InternalRow

This is a first draft of the ability to construct expressions that will take a catalyst internal row and construct a Product (case class or tuple) that has fields with the correct names.  Support include:
 - Nested classes
 - Maps
 - Efficiently handling of arrays of primitive types

Not yet supported:
 - Case classes that require custom collection types (i.e. List instead of Seq).

Author: Michael Armbrust <michael@databricks.com>

Closes #9100 from marmbrus/productContructor.
---
 .../catalyst/expressions/UnsafeArrayData.java |   4 +
 .../spark/sql/catalyst/ScalaReflection.scala  | 302 +++++++++++++-
 .../spark/sql/catalyst/encoders/Encoder.scala |  14 +
 .../catalyst/encoders/ProductEncoder.scala    |  26 +-
 .../sql/catalyst/expressions/objects.scala    | 154 +++++++-
 .../spark/sql/types/ArrayBasedMapData.scala   |   4 +
 .../apache/spark/sql/types/ArrayData.scala    |   5 +
 .../spark/sql/types/GenericArrayData.scala    |   4 +-
 .../encoders/ProductEncoderSuite.scala        | 369 +++++++++++-------
 9 files changed, 723 insertions(+), 159 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index 796f8abec9a1..4c63abb071e3 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -74,6 +74,10 @@ private void assertIndexIsValid(int ordinal) {
     assert ordinal < numElements : "ordinal (" + ordinal + ") should < " + numElements;
   }
 
+  public Object[] array() {
+    throw new UnsupportedOperationException("Only supported on GenericArrayData.");
+  }
+
   /**
    * Construct a new UnsafeArrayData. The resulting UnsafeArrayData won't be usable until
    * `pointTo()` has been called, since the value returned by this constructor is equivalent
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 8b733f2a0b91..8edd6498e516 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.catalyst
 
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedExtractValue, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.Utils
@@ -80,6 +81,9 @@ trait ScalaReflection {
    * Returns the Spark SQL DataType for a given scala type.  Where this is not an exact mapping
    * to a native type, an ObjectType is returned. Special handling is also used for Arrays including
    * those that hold primitive types.
+   *
+   * Unlike `schemaFor`, this function doesn't do any massaging of types into the Spark SQL type
+   * system.  As a result, ObjectType will be returned for things like boxed Integers
    */
   def dataTypeFor(tpe: `Type`): DataType = tpe match {
     case t if t <:< definitions.IntTpe => IntegerType
@@ -114,6 +118,298 @@ trait ScalaReflection {
       }
   }
 
+  /**
+   * Given a type `T` this function constructs and ObjectType that holds a class of type
+   * Array[T].  Special handling is performed for primitive types to map them back to their raw
+   * JVM form instead of the Scala Array that handles auto boxing.
+   */
+  def arrayClassFor(tpe: `Type`): DataType = {
+    val cls = tpe match {
+      case t if t <:< definitions.IntTpe => classOf[Array[Int]]
+      case t if t <:< definitions.LongTpe => classOf[Array[Long]]
+      case t if t <:< definitions.DoubleTpe => classOf[Array[Double]]
+      case t if t <:< definitions.FloatTpe => classOf[Array[Float]]
+      case t if t <:< definitions.ShortTpe => classOf[Array[Short]]
+      case t if t <:< definitions.ByteTpe => classOf[Array[Byte]]
+      case t if t <:< definitions.BooleanTpe => classOf[Array[Boolean]]
+      case other =>
+        // There is probably a better way to do this, but I couldn't find it...
+        val elementType = dataTypeFor(other).asInstanceOf[ObjectType].cls
+        java.lang.reflect.Array.newInstance(elementType, 1).getClass
+
+    }
+    ObjectType(cls)
+  }
+
+  /**
+   * Returns an expression that can be used to construct an object of type `T` given a an input
+   * row with a compatible schema.  Fields of the row will be extracted using UnresolvedAttributes
+   * of the same name as the constructor arguments.  Nested classes will have their fields accessed
+   * using UnresolvedExtractValue.
+   */
+  def constructorFor[T : TypeTag]: Expression = constructorFor(typeOf[T], None)
+
+  protected def constructorFor(
+      tpe: `Type`,
+      path: Option[Expression]): Expression = ScalaReflectionLock.synchronized {
+
+    /** Returns the current path with a sub-field extracted. */
+    def addToPath(part: String) =
+      path
+        .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
+        .getOrElse(UnresolvedAttribute(part))
+
+    /** Returns the current path or throws an error. */
+    def getPath = path.getOrElse(sys.error("Constructors must start at a class type"))
+
+    tpe match {
+      case t if !dataTypeFor(t).isInstanceOf[ObjectType] =>
+        getPath
+
+      case t if t <:< localTypeOf[Option[_]] =>
+        val TypeRef(_, _, Seq(optType)) = t
+        val boxedType = optType match {
+          // For primitive types we must manually box the primitive value.
+          case t if t <:< definitions.IntTpe => Some(classOf[java.lang.Integer])
+          case t if t <:< definitions.LongTpe => Some(classOf[java.lang.Long])
+          case t if t <:< definitions.DoubleTpe => Some(classOf[java.lang.Double])
+          case t if t <:< definitions.FloatTpe => Some(classOf[java.lang.Float])
+          case t if t <:< definitions.ShortTpe => Some(classOf[java.lang.Short])
+          case t if t <:< definitions.ByteTpe => Some(classOf[java.lang.Byte])
+          case t if t <:< definitions.BooleanTpe => Some(classOf[java.lang.Boolean])
+          case _ => None
+        }
+
+        boxedType.map { boxedType =>
+          val objectType = ObjectType(boxedType)
+          WrapOption(
+            objectType,
+            NewInstance(
+              boxedType,
+              getPath :: Nil,
+              propagateNull = true,
+              objectType))
+        }.getOrElse {
+          val className: String = optType.erasure.typeSymbol.asClass.fullName
+          val cls = Utils.classForName(className)
+          val objectType = ObjectType(cls)
+
+          WrapOption(objectType, constructorFor(optType, path))
+        }
+
+      case t if t <:< localTypeOf[java.lang.Integer] =>
+        val boxedType = classOf[java.lang.Integer]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Long] =>
+        val boxedType = classOf[java.lang.Long]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Double] =>
+        val boxedType = classOf[java.lang.Double]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Float] =>
+        val boxedType = classOf[java.lang.Float]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Short] =>
+        val boxedType = classOf[java.lang.Short]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Byte] =>
+        val boxedType = classOf[java.lang.Byte]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Boolean] =>
+        val boxedType = classOf[java.lang.Boolean]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.sql.Date] =>
+        StaticInvoke(
+          DateTimeUtils,
+          ObjectType(classOf[java.sql.Date]),
+          "toJavaDate",
+          getPath :: Nil,
+          propagateNull = true)
+
+      case t if t <:< localTypeOf[java.sql.Timestamp] =>
+        StaticInvoke(
+          DateTimeUtils,
+          ObjectType(classOf[java.sql.Timestamp]),
+          "toJavaTimestamp",
+          getPath :: Nil,
+          propagateNull = true)
+
+      case t if t <:< localTypeOf[java.lang.String] =>
+        Invoke(getPath, "toString", ObjectType(classOf[String]))
+
+      case t if t <:< localTypeOf[java.math.BigDecimal] =>
+        Invoke(getPath, "toJavaBigDecimal", ObjectType(classOf[java.math.BigDecimal]))
+
+      case t if t <:< localTypeOf[Array[_]] =>
+        val TypeRef(_, _, Seq(elementType)) = t
+        val elementDataType = dataTypeFor(elementType)
+        val Schema(dataType, nullable) = schemaFor(elementType)
+
+        val primitiveMethod = elementType match {
+          case t if t <:< definitions.IntTpe => Some("toIntArray")
+          case t if t <:< definitions.LongTpe => Some("toLongArray")
+          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
+          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
+          case t if t <:< definitions.ShortTpe => Some("toShortArray")
+          case t if t <:< definitions.ByteTpe => Some("toByteArray")
+          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
+          case _ => None
+        }
+
+        primitiveMethod.map { method =>
+          Invoke(getPath, method, dataTypeFor(t))
+        }.getOrElse {
+          val returnType = dataTypeFor(t)
+          Invoke(
+            MapObjects(p => constructorFor(elementType, Some(p)), getPath, dataType),
+            "array",
+            returnType)
+        }
+
+      case t if t <:< localTypeOf[Map[_, _]] =>
+        val TypeRef(_, _, Seq(keyType, valueType)) = t
+        val Schema(keyDataType, _) = schemaFor(keyType)
+        val Schema(valueDataType, valueNullable) = schemaFor(valueType)
+
+        val primitiveMethodKey = keyType match {
+          case t if t <:< definitions.IntTpe => Some("toIntArray")
+          case t if t <:< definitions.LongTpe => Some("toLongArray")
+          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
+          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
+          case t if t <:< definitions.ShortTpe => Some("toShortArray")
+          case t if t <:< definitions.ByteTpe => Some("toByteArray")
+          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
+          case _ => None
+        }
+
+        val keyData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(keyType, Some(p)),
+              Invoke(getPath, "keyArray", ArrayType(keyDataType)),
+              keyDataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        val primitiveMethodValue = valueType match {
+          case t if t <:< definitions.IntTpe => Some("toIntArray")
+          case t if t <:< definitions.LongTpe => Some("toLongArray")
+          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
+          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
+          case t if t <:< definitions.ShortTpe => Some("toShortArray")
+          case t if t <:< definitions.ByteTpe => Some("toByteArray")
+          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
+          case _ => None
+        }
+
+        val valueData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(valueType, Some(p)),
+              Invoke(getPath, "valueArray", ArrayType(valueDataType)),
+              valueDataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        StaticInvoke(
+          ArrayBasedMapData,
+          ObjectType(classOf[Map[_, _]]),
+          "toScalaMap",
+          keyData :: valueData :: Nil)
+
+      case t if t <:< localTypeOf[Seq[_]] =>
+        val TypeRef(_, _, Seq(elementType)) = t
+        val elementDataType = dataTypeFor(elementType)
+        val Schema(dataType, nullable) = schemaFor(elementType)
+
+        // Avoid boxing when possible by just wrapping a primitive array.
+        val primitiveMethod = elementType match {
+          case _ if nullable => None
+          case t if t <:< definitions.IntTpe => Some("toIntArray")
+          case t if t <:< definitions.LongTpe => Some("toLongArray")
+          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
+          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
+          case t if t <:< definitions.ShortTpe => Some("toShortArray")
+          case t if t <:< definitions.ByteTpe => Some("toByteArray")
+          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
+          case _ => None
+        }
+
+        val arrayData = primitiveMethod.map { method =>
+          Invoke(getPath, method, arrayClassFor(elementType))
+        }.getOrElse {
+          Invoke(
+            MapObjects(p => constructorFor(elementType, Some(p)), getPath, dataType),
+            "array",
+            arrayClassFor(elementType))
+        }
+
+        StaticInvoke(
+          scala.collection.mutable.WrappedArray,
+          ObjectType(classOf[Seq[_]]),
+          "make",
+          arrayData :: Nil)
+
+
+      case t if t <:< localTypeOf[Product] =>
+        val formalTypeArgs = t.typeSymbol.asClass.typeParams
+        val TypeRef(_, _, actualTypeArgs) = t
+        val constructorSymbol = t.member(nme.CONSTRUCTOR)
+        val params = if (constructorSymbol.isMethod) {
+          constructorSymbol.asMethod.paramss
+        } else {
+          // Find the primary constructor, and use its parameter ordering.
+          val primaryConstructorSymbol: Option[Symbol] =
+            constructorSymbol.asTerm.alternatives.find(s =>
+              s.isMethod && s.asMethod.isPrimaryConstructor)
+
+          if (primaryConstructorSymbol.isEmpty) {
+            sys.error("Internal SQL error: Product object did not have a primary constructor.")
+          } else {
+            primaryConstructorSymbol.get.asMethod.paramss
+          }
+        }
+
+        val className: String = t.erasure.typeSymbol.asClass.fullName
+        val cls = Utils.classForName(className)
+
+        val arguments = params.head.map { p =>
+          val fieldName = p.name.toString
+          val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
+          val dataType = dataTypeFor(fieldType)
+
+          constructorFor(fieldType, Some(addToPath(fieldName)))
+        }
+
+        val newInstance = NewInstance(cls, arguments, propagateNull = false, ObjectType(cls))
+
+        if (path.nonEmpty) {
+          expressions.If(
+            IsNull(getPath),
+            expressions.Literal.create(null, ObjectType(cls)),
+            newInstance
+          )
+        } else {
+          newInstance
+        }
+
+    }
+  }
+
   /** Returns expressions for extracting all the fields from the given type. */
   def extractorsFor[T : TypeTag](inputObject: Expression): Seq[Expression] = {
     ScalaReflectionLock.synchronized {
@@ -227,13 +523,13 @@ trait ScalaReflection {
           val elementDataType = dataTypeFor(elementType)
           val Schema(dataType, nullable) = schemaFor(elementType)
 
-          if (!elementDataType.isInstanceOf[AtomicType]) {
-            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
-          } else {
+          if (dataType.isInstanceOf[AtomicType]) {
             NewInstance(
               classOf[GenericArrayData],
               inputObject :: Nil,
               dataType = ArrayType(dataType, nullable))
+          } else {
+            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
           }
 
         case t if t <:< localTypeOf[Map[_, _]] =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index 8dacfa9477ee..3618247d5d51 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -17,8 +17,10 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+
 import scala.reflect.ClassTag
 
+import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types.StructType
 
@@ -41,4 +43,16 @@ trait Encoder[T] {
    * copy the result before making another call if required.
    */
   def toRow(t: T): InternalRow
+
+  /**
+   * Returns an object of type `T`, extracting the required values from the provided row.  Note that
+   * you must bind` and encoder to a specific schema before you can call this function.
+   */
+  def fromRow(row: InternalRow): T
+
+  /**
+   * Returns a new copy of this encoder, where the expressions used by `fromRow` are bound to the
+   * given schema
+   */
+  def bind(schema: Seq[Attribute]): Encoder[T]
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
index a23613673ebb..b0381880c3bd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -17,8 +17,10 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
+import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
+import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
 
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.{typeTag, TypeTag}
@@ -31,7 +33,7 @@ import org.apache.spark.sql.types.{ObjectType, StructType}
  * internal binary representation.
  */
 object ProductEncoder {
-  def apply[T <: Product : TypeTag]: Encoder[T] = {
+  def apply[T <: Product : TypeTag]: ClassEncoder[T] = {
     // We convert the not-serializable TypeTag into StructType and ClassTag.
     val schema = ScalaReflection.schemaFor[T].dataType.asInstanceOf[StructType]
     val mirror = typeTag[T].mirror
@@ -39,7 +41,8 @@ object ProductEncoder {
 
     val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
     val extractExpressions = ScalaReflection.extractorsFor[T](inputObject)
-    new ClassEncoder[T](schema, extractExpressions, ClassTag[T](cls))
+    val constructExpression = ScalaReflection.constructorFor[T]
+    new ClassEncoder[T](schema, extractExpressions, constructExpression, ClassTag[T](cls))
   }
 }
 
@@ -54,14 +57,31 @@ object ProductEncoder {
 case class ClassEncoder[T](
     schema: StructType,
     extractExpressions: Seq[Expression],
+    constructExpression: Expression,
     clsTag: ClassTag[T])
   extends Encoder[T] {
 
   private val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
   private val inputRow = new GenericMutableRow(1)
 
+  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
+  private val dataType = ObjectType(clsTag.runtimeClass)
+
   override def toRow(t: T): InternalRow = {
     inputRow(0) = t
     extractProjection(inputRow)
   }
+
+  override def fromRow(row: InternalRow): T = {
+    constructProjection(row).get(0, dataType).asInstanceOf[T]
+  }
+
+  override def bind(schema: Seq[Attribute]): ClassEncoder[T] = {
+    val plan = Project(Alias(constructExpression, "object")() :: Nil, LocalRelation(schema))
+    val analyzedPlan = SimpleAnalyzer.execute(plan)
+    val resolvedExpression = analyzedPlan.expressions.head.children.head
+    val boundExpression = BindReferences.bindReference(resolvedExpression, schema)
+
+    copy(constructExpression = boundExpression)
+  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index e1f960a6e605..e8c1c93cf562 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -17,9 +17,12 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
+import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
+
 import scala.language.existentials
 
-import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.{ScalaReflection, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.types._
 
@@ -48,7 +51,7 @@ case class StaticInvoke(
     case other => other.getClass.getName.stripSuffix("$")
   }
   override def nullable: Boolean = true
-  override def children: Seq[Expression] = Nil
+  override def children: Seq[Expression] = arguments
 
   override def eval(input: InternalRow): Any =
     throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
@@ -69,7 +72,7 @@ case class StaticInvoke(
       s"""
         ${argGen.map(_.code).mkString("\n")}
 
-        boolean ${ev.isNull} = true;
+        boolean ${ev.isNull} = !$argsNonNull;
         $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
 
         if ($argsNonNull) {
@@ -81,8 +84,8 @@ case class StaticInvoke(
       s"""
         ${argGen.map(_.code).mkString("\n")}
 
-        final boolean ${ev.isNull} = ${ev.value} == null;
         $javaType ${ev.value} = $objectName.$functionName($argString);
+        final boolean ${ev.isNull} = ${ev.value} == null;
       """
     }
   }
@@ -92,6 +95,10 @@ case class StaticInvoke(
  * Calls the specified function on an object, optionally passing arguments.  If the `targetObject`
  * expression evaluates to null then null will be returned.
  *
+ * In some cases, due to erasure, the schema may expect a primitive type when in fact the method
+ * is returning java.lang.Object.  In this case, we will generate code that attempts to unbox the
+ * value automatically.
+ *
  * @param targetObject An expression that will return the object to call the method on.
  * @param functionName The name of the method to call.
  * @param dataType The expected return type of the function.
@@ -109,6 +116,35 @@ case class Invoke(
   override def eval(input: InternalRow): Any =
     throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
 
+  lazy val method = targetObject.dataType match {
+    case ObjectType(cls) =>
+      cls
+        .getMethods
+        .find(_.getName == functionName)
+        .getOrElse(sys.error(s"Couldn't find $functionName on $cls"))
+        .getReturnType
+        .getName
+    case _ => ""
+  }
+
+  lazy val unboxer = (dataType, method) match {
+    case (IntegerType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Integer)$s).intValue()"
+    case (LongType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Long)$s).longValue()"
+    case (FloatType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Float)$s).floatValue()"
+    case (ShortType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Short)$s).shortValue()"
+    case (ByteType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Byte)$s).byteValue()"
+    case (DoubleType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Double)$s).doubleValue()"
+    case (BooleanType, "java.lang.Object") => (s: String) =>
+      s"((java.lang.Boolean)$s).booleanValue()"
+    case _ => identity[String] _
+  }
+
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val javaType = ctx.javaType(dataType)
     val obj = targetObject.gen(ctx)
@@ -123,6 +159,8 @@ case class Invoke(
       ""
     }
 
+    val value = unboxer(s"${obj.value}.$functionName($argString)")
+
     s"""
       ${obj.code}
       ${argGen.map(_.code).mkString("\n")}
@@ -130,7 +168,7 @@ case class Invoke(
       boolean ${ev.isNull} = ${obj.value} == null;
       $javaType ${ev.value} =
         ${ev.isNull} ?
-        ${ctx.defaultValue(dataType)} : ($javaType) ${obj.value}.$functionName($argString);
+        ${ctx.defaultValue(dataType)} : ($javaType) $value;
       $objNullCheck
     """
   }
@@ -190,8 +228,8 @@ case class NewInstance(
       s"""
         ${argGen.map(_.code).mkString("\n")}
 
-        final boolean ${ev.isNull} = ${ev.value} == null;
         $javaType ${ev.value} = new $className($argString);
+        final boolean ${ev.isNull} = ${ev.value} == null;
       """
     }
   }
@@ -210,8 +248,6 @@ case class UnwrapOption(
 
   override def nullable: Boolean = true
 
-  override def children: Seq[Expression] = Nil
-
   override def inputTypes: Seq[AbstractDataType] = ObjectType :: Nil
 
   override def eval(input: InternalRow): Any =
@@ -231,6 +267,43 @@ case class UnwrapOption(
   }
 }
 
+/**
+ * Converts the result of evaluating `child` into an option, checking both the isNull bit and
+ * (in the case of reference types) equality with null.
+ * @param optionType The datatype to be held inside of the Option.
+ * @param child The expression to evaluate and wrap.
+ */
+case class WrapOption(optionType: DataType, child: Expression)
+  extends UnaryExpression with ExpectsInputTypes {
+
+  override def dataType: DataType = ObjectType(classOf[Option[_]])
+
+  override def nullable: Boolean = true
+
+  override def inputTypes: Seq[AbstractDataType] = ObjectType :: Nil
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val javaType = ctx.javaType(optionType)
+    val inputObject = child.gen(ctx)
+
+    s"""
+      ${inputObject.code}
+
+      boolean ${ev.isNull} = false;
+      scala.Option<$javaType> ${ev.value} =
+        ${inputObject.isNull} ?
+        scala.Option$$.MODULE$$.apply(null) : new scala.Some(${inputObject.value});
+    """
+  }
+}
+
+/**
+ * A place holder for the loop variable used in [[MapObjects]].  This should never be constructed
+ * manually, but will instead be passed into the provided lambda function.
+ */
 case class LambdaVariable(value: String, isNull: String, dataType: DataType) extends Expression {
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
@@ -251,7 +324,7 @@ case class LambdaVariable(value: String, isNull: String, dataType: DataType) ext
  * as an ArrayType.  This is similar to a typical map operation, but where the lambda function
  * is expressed using catalyst expressions.
  *
- * The following collection ObjectTypes are currently supported: Seq, Array
+ * The following collection ObjectTypes are currently supported: Seq, Array, ArrayData
  *
  * @param function A function that returns an expression, given an attribute that can be used
  *                 to access the current value.  This is does as a lambda function so that
@@ -265,14 +338,32 @@ case class MapObjects(
     inputData: Expression,
     elementType: DataType) extends Expression {
 
-  private val loopAttribute = AttributeReference("loopVar", elementType)()
-  private val completeFunction = function(loopAttribute)
+  private lazy val loopAttribute = AttributeReference("loopVar", elementType)()
+  private lazy val completeFunction = function(loopAttribute)
 
-  private val (lengthFunction, itemAccessor) = inputData.dataType match {
-    case ObjectType(cls) if cls.isAssignableFrom(classOf[Seq[_]]) =>
-      (".size()", (i: String) => s".apply($i)")
+  private lazy val (lengthFunction, itemAccessor, primitiveElement) = inputData.dataType match {
+    case ObjectType(cls) if classOf[Seq[_]].isAssignableFrom(cls) =>
+      (".size()", (i: String) => s".apply($i)", false)
     case ObjectType(cls) if cls.isArray =>
-      (".length", (i: String) => s"[$i]")
+      (".length", (i: String) => s"[$i]", false)
+    case ArrayType(s: StructType, _) =>
+      (".numElements()", (i: String) => s".getStruct($i, ${s.size})", false)
+    case ArrayType(a: ArrayType, _) =>
+      (".numElements()", (i: String) => s".getArray($i)", true)
+    case ArrayType(IntegerType, _) =>
+      (".numElements()", (i: String) => s".getInt($i)", true)
+    case ArrayType(LongType, _) =>
+      (".numElements()", (i: String) => s".getLong($i)", true)
+    case ArrayType(FloatType, _) =>
+      (".numElements()", (i: String) => s".getFloat($i)", true)
+    case ArrayType(DoubleType, _) =>
+      (".numElements()", (i: String) => s".getDouble($i)", true)
+    case ArrayType(ByteType, _) =>
+      (".numElements()", (i: String) => s".getByte($i)", true)
+    case ArrayType(ShortType, _) =>
+      (".numElements()", (i: String) => s".getShort($i)", true)
+    case ArrayType(BooleanType, _) =>
+      (".numElements()", (i: String) => s".getBoolean($i)", true)
   }
 
   override def nullable: Boolean = true
@@ -294,15 +385,38 @@ case class MapObjects(
     val loopIsNull = ctx.freshName("loopIsNull")
 
     val loopVariable = LambdaVariable(loopValue, loopIsNull, elementType)
-    val boundFunction = completeFunction transform {
+    val substitutedFunction = completeFunction transform {
       case a: AttributeReference if a == loopAttribute => loopVariable
     }
+    // A hack to run this through the analyzer (to bind extractions).
+    val boundFunction =
+      SimpleAnalyzer.execute(Project(Alias(substitutedFunction, "")() :: Nil, LocalRelation(Nil)))
+        .expressions.head.children.head
 
     val genFunction = boundFunction.gen(ctx)
     val dataLength = ctx.freshName("dataLength")
     val convertedArray = ctx.freshName("convertedArray")
     val loopIndex = ctx.freshName("loopIndex")
 
+    val convertedType = ctx.javaType(boundFunction.dataType)
+
+    // Because of the way Java defines nested arrays, we have to handle the syntax specially.
+    // Specifically, we have to insert the [$dataLength] in between the type and any extra nested
+    // array declarations (i.e. new String[1][]).
+    val arrayConstructor = if (convertedType contains "[]") {
+      val rawType = convertedType.takeWhile(_ != '[')
+      val arrayPart = convertedType.reverse.takeWhile(c => c == '[' || c == ']').reverse
+      s"new $rawType[$dataLength]$arrayPart"
+    } else {
+      s"new $convertedType[$dataLength]"
+    }
+
+    val loopNullCheck = if (primitiveElement) {
+      s"boolean $loopIsNull = ${genInputData.value}.isNullAt($loopIndex);"
+    } else {
+      s"boolean $loopIsNull = ${genInputData.isNull} || $loopValue == null;"
+    }
+
     s"""
       ${genInputData.code}
 
@@ -310,19 +424,19 @@ case class MapObjects(
       $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
 
       if (!${ev.isNull}) {
-        Object[] $convertedArray = null;
+        $convertedType[] $convertedArray = null;
         int $dataLength = ${genInputData.value}$lengthFunction;
-        $convertedArray = new Object[$dataLength];
+        $convertedArray = $arrayConstructor;
 
         int $loopIndex = 0;
         while ($loopIndex < $dataLength) {
           $elementJavaType $loopValue =
             ($elementJavaType)${genInputData.value}${itemAccessor(loopIndex)};
-          boolean $loopIsNull = $loopValue == null;
+          $loopNullCheck
 
           ${genFunction.code}
 
-          $convertedArray[$loopIndex] = ${genFunction.value};
+          $convertedArray[$loopIndex] = ($convertedType)${genFunction.value};
           $loopIndex += 1;
         }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
index 52069598ee30..5f22e59d5f1d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
@@ -62,4 +62,8 @@ object ArrayBasedMapData {
     val values = map.valueArray.asInstanceOf[GenericArrayData].array
     keys.zip(values).toMap
   }
+
+  def toScalaMap(keys: Array[Any], values: Array[Any]): Map[Any, Any] = {
+    keys.zip(values).toMap
+  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala
index 642c56f12ded..b4ea300f5f30 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala
@@ -26,6 +26,8 @@ abstract class ArrayData extends SpecializedGetters with Serializable {
 
   def copy(): ArrayData
 
+  def array: Array[Any]
+
   def toBooleanArray(): Array[Boolean] = {
     val size = numElements()
     val values = new Array[Boolean](size)
@@ -103,6 +105,9 @@ abstract class ArrayData extends SpecializedGetters with Serializable {
     values
   }
 
+  def toObjectArray(elementType: DataType): Array[AnyRef] =
+    toArray[AnyRef](elementType: DataType)
+
   def toArray[T: ClassTag](elementType: DataType): Array[T] = {
     val size = numElements()
     val values = new Array[T](size)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
index c3816033275d..9448d88d6c5f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.types
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
-class GenericArrayData(private[sql] val array: Array[Any]) extends ArrayData {
+class GenericArrayData(val array: Array[Any]) extends ArrayData {
 
   def this(seq: scala.collection.GenIterable[Any]) = this(seq.toArray)
 
@@ -29,6 +29,8 @@ class GenericArrayData(private[sql] val array: Array[Any]) extends ArrayData {
   def this(primitiveArray: Array[Long]) = this(primitiveArray.toSeq)
   def this(primitiveArray: Array[Float]) = this(primitiveArray.toSeq)
   def this(primitiveArray: Array[Double]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Short]) = this(primitiveArray.toSeq)
+  def this(primitiveArray: Array[Byte]) = this(primitiveArray.toSeq)
   def this(primitiveArray: Array[Boolean]) = this(primitiveArray.toSeq)
 
   override def copy(): ArrayData = new GenericArrayData(array.clone())
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
index 99c993d3febc..02e43ddb3547 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -17,158 +17,263 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-import java.sql.{Date, Timestamp}
+import java.util
+
+import org.apache.spark.sql.types.{StructField, ArrayType, ArrayData}
+
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.runtime.universe._
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.catalyst.ScalaReflection._
-import org.apache.spark.sql.catalyst.expressions.UnsafeProjection
 import org.apache.spark.sql.catalyst._
 
-
 case class RepeatedStruct(s: Seq[PrimitiveData])
 
 case class NestedArray(a: Array[Array[Int]])
 
-class ProductEncoderSuite extends SparkFunSuite {
+case class BoxedData(
+    intField: java.lang.Integer,
+    longField: java.lang.Long,
+    doubleField: java.lang.Double,
+    floatField: java.lang.Float,
+    shortField: java.lang.Short,
+    byteField: java.lang.Byte,
+    booleanField: java.lang.Boolean)
 
-  test("convert PrimitiveData to InternalRow") {
-    val inputData = PrimitiveData(1, 1, 1, 1, 1, 1, true)
-    val encoder = ProductEncoder[PrimitiveData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(convertedData.getInt(0) == 1)
-    assert(convertedData.getLong(1) == 1.toLong)
-    assert(convertedData.getDouble(2) == 1.toDouble)
-    assert(convertedData.getFloat(3) == 1.toFloat)
-    assert(convertedData.getShort(4) == 1.toShort)
-    assert(convertedData.getByte(5) == 1.toByte)
-    assert(convertedData.getBoolean(6) == true)
-  }
+case class RepeatedData(
+    arrayField: Seq[Int],
+    arrayFieldContainsNull: Seq[java.lang.Integer],
+    mapField: scala.collection.Map[Int, Long],
+    mapFieldNull: scala.collection.Map[Int, java.lang.Long],
+    structField: PrimitiveData)
 
-  test("convert Some[_] to InternalRow") {
-    val primitiveData = PrimitiveData(1, 1, 1, 1, 1, 1, true)
-    val inputData = OptionalData(Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
-      Some(primitiveData))
-
-    val encoder = ProductEncoder[OptionalData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(convertedData.getInt(0) == 2)
-    assert(convertedData.getLong(1) == 2.toLong)
-    assert(convertedData.getDouble(2) == 2.toDouble)
-    assert(convertedData.getFloat(3) == 2.toFloat)
-    assert(convertedData.getShort(4) == 2.toShort)
-    assert(convertedData.getByte(5) == 2.toByte)
-    assert(convertedData.getBoolean(6) == true)
-
-    val nestedRow = convertedData.getStruct(7, 7)
-    assert(nestedRow.getInt(0) == 1)
-    assert(nestedRow.getLong(1) == 1.toLong)
-    assert(nestedRow.getDouble(2) == 1.toDouble)
-    assert(nestedRow.getFloat(3) == 1.toFloat)
-    assert(nestedRow.getShort(4) == 1.toShort)
-    assert(nestedRow.getByte(5) == 1.toByte)
-    assert(nestedRow.getBoolean(6) == true)
-  }
+case class SpecificCollection(l: List[Int])
 
-  test("convert None to InternalRow") {
-    val inputData = OptionalData(None, None, None, None, None, None, None, None)
-    val encoder = ProductEncoder[OptionalData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(convertedData.isNullAt(0))
-    assert(convertedData.isNullAt(1))
-    assert(convertedData.isNullAt(2))
-    assert(convertedData.isNullAt(3))
-    assert(convertedData.isNullAt(4))
-    assert(convertedData.isNullAt(5))
-    assert(convertedData.isNullAt(6))
-    assert(convertedData.isNullAt(7))
-  }
+class ProductEncoderSuite extends SparkFunSuite {
 
-  test("convert nullable but present data to InternalRow") {
-    val inputData = NullableData(
-      1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true, "test", new java.math.BigDecimal(1), new Date(0),
-      new Timestamp(0), Array[Byte](1, 2, 3))
-
-    val encoder = ProductEncoder[NullableData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(convertedData.getInt(0) == 1)
-    assert(convertedData.getLong(1) == 1.toLong)
-    assert(convertedData.getDouble(2) == 1.toDouble)
-    assert(convertedData.getFloat(3) == 1.toFloat)
-    assert(convertedData.getShort(4) == 1.toShort)
-    assert(convertedData.getByte(5) == 1.toByte)
-    assert(convertedData.getBoolean(6) == true)
-  }
+  encodeDecodeTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
 
-  test("convert nullable data to InternalRow") {
-    val inputData =
-      NullableData(null, null, null, null, null, null, null, null, null, null, null, null)
-
-    val encoder = ProductEncoder[NullableData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(convertedData.isNullAt(0))
-    assert(convertedData.isNullAt(1))
-    assert(convertedData.isNullAt(2))
-    assert(convertedData.isNullAt(3))
-    assert(convertedData.isNullAt(4))
-    assert(convertedData.isNullAt(5))
-    assert(convertedData.isNullAt(6))
-    assert(convertedData.isNullAt(7))
-    assert(convertedData.isNullAt(8))
-    assert(convertedData.isNullAt(9))
-    assert(convertedData.isNullAt(10))
-    assert(convertedData.isNullAt(11))
-  }
+  // TODO: Support creating specific subclasses of Seq.
+  ignore("Specific collection types") { encodeDecodeTest(SpecificCollection(1 :: Nil)) }
 
-  test("convert repeated struct") {
-    val inputData = RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil)
-    val encoder = ProductEncoder[RepeatedStruct]
-
-    val converted = encoder.toRow(inputData)
-    val convertedStruct = converted.getArray(0).getStruct(0, 7)
-    assert(convertedStruct.getInt(0) == 1)
-    assert(convertedStruct.getLong(1) == 1.toLong)
-    assert(convertedStruct.getDouble(2) == 1.toDouble)
-    assert(convertedStruct.getFloat(3) == 1.toFloat)
-    assert(convertedStruct.getShort(4) == 1.toShort)
-    assert(convertedStruct.getByte(5) == 1.toByte)
-    assert(convertedStruct.getBoolean(6) == true)
-  }
+  encodeDecodeTest(
+    OptionalData(
+      Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
+      Some(PrimitiveData(1, 1, 1, 1, 1, 1, true))))
 
-  test("convert nested seq") {
-    val convertedData = ProductEncoder[Tuple1[Seq[Seq[Int]]]].toRow(Tuple1(Seq(Seq(1))))
-    assert(convertedData.getArray(0).getArray(0).getInt(0) == 1)
+  encodeDecodeTest(OptionalData(None, None, None, None, None, None, None, None))
 
-    val convertedData2 = ProductEncoder[Tuple1[Seq[Seq[Seq[Int]]]]].toRow(Tuple1(Seq(Seq(Seq(1)))))
-    assert(convertedData2.getArray(0).getArray(0).getArray(0).getInt(0) == 1)
-  }
+  encodeDecodeTest(
+    BoxedData(1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true))
 
-  test("convert nested array") {
-    val convertedData = ProductEncoder[Tuple1[Array[Array[Int]]]].toRow(Tuple1(Array(Array(1))))
-  }
+  encodeDecodeTest(
+    BoxedData(null, null, null, null, null, null, null))
+
+  encodeDecodeTest(
+    RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil))
 
-  test("convert complex") {
-    val inputData = ComplexData(
+  encodeDecodeTest(
+    RepeatedData(
       Seq(1, 2),
-      Array(1, 2),
-      1 :: 2 :: Nil,
       Seq(new Integer(1), null, new Integer(2)),
       Map(1 -> 2L),
-      Map(1 -> new java.lang.Long(2)),
-      PrimitiveData(1, 1, 1, 1, 1, 1, true),
-      Array(Array(1)))
-
-    val encoder = ProductEncoder[ComplexData]
-    val convertedData = encoder.toRow(inputData)
-
-    assert(!convertedData.isNullAt(0))
-    val seq = convertedData.getArray(0)
-    assert(seq.numElements() == 2)
-    assert(seq.getInt(0) == 1)
-    assert(seq.getInt(1) == 2)
+      Map(1 -> null),
+      PrimitiveData(1, 1, 1, 1, 1, 1, true)))
+
+  encodeDecodeTest(("nullable Seq[Integer]", Seq[Integer](1, null)))
+
+  encodeDecodeTest(("Seq[(String, String)]",
+    Seq(("a", "b"))))
+  encodeDecodeTest(("Seq[(Int, Int)]",
+    Seq((1, 2))))
+  encodeDecodeTest(("Seq[(Long, Long)]",
+    Seq((1L, 2L))))
+  encodeDecodeTest(("Seq[(Float, Float)]",
+    Seq((1.toFloat, 2.toFloat))))
+  encodeDecodeTest(("Seq[(Double, Double)]",
+    Seq((1.toDouble, 2.toDouble))))
+  encodeDecodeTest(("Seq[(Short, Short)]",
+    Seq((1.toShort, 2.toShort))))
+  encodeDecodeTest(("Seq[(Byte, Byte)]",
+    Seq((1.toByte, 2.toByte))))
+  encodeDecodeTest(("Seq[(Boolean, Boolean)]",
+    Seq((true, false))))
+
+  // TODO: Decoding/encoding of complex maps.
+  ignore("complex maps") {
+    encodeDecodeTest(("Map[Int, (String, String)]",
+      Map(1 ->("a", "b"))))
+  }
+
+  encodeDecodeTest(("ArrayBuffer[(String, String)]",
+    ArrayBuffer(("a", "b"))))
+  encodeDecodeTest(("ArrayBuffer[(Int, Int)]",
+    ArrayBuffer((1, 2))))
+  encodeDecodeTest(("ArrayBuffer[(Long, Long)]",
+    ArrayBuffer((1L, 2L))))
+  encodeDecodeTest(("ArrayBuffer[(Float, Float)]",
+    ArrayBuffer((1.toFloat, 2.toFloat))))
+  encodeDecodeTest(("ArrayBuffer[(Double, Double)]",
+    ArrayBuffer((1.toDouble, 2.toDouble))))
+  encodeDecodeTest(("ArrayBuffer[(Short, Short)]",
+    ArrayBuffer((1.toShort, 2.toShort))))
+  encodeDecodeTest(("ArrayBuffer[(Byte, Byte)]",
+    ArrayBuffer((1.toByte, 2.toByte))))
+  encodeDecodeTest(("ArrayBuffer[(Boolean, Boolean)]",
+    ArrayBuffer((true, false))))
+
+  encodeDecodeTest(("Seq[Seq[(Int, Int)]]",
+    Seq(Seq((1, 2)))))
+
+  encodeDecodeTestCustom(("Array[Array[(Int, Int)]]",
+    Array(Array((1, 2)))))
+  { (l, r) => l._2(0)(0) == r._2(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[(Int, Int)]]",
+    Array(Array(Array((1, 2))))))
+  { (l, r) => l._2(0)(0)(0) == r._2(0)(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Array[(Int, Int)]]]",
+    Array(Array(Array(Array((1, 2)))))))
+  { (l, r) => l._2(0)(0)(0)(0) == r._2(0)(0)(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Array[Array[(Int, Int)]]]]",
+    Array(Array(Array(Array(Array((1, 2))))))))
+  { (l, r) => l._2(0)(0)(0)(0)(0) == r._2(0)(0)(0)(0)(0) }
+
+
+  encodeDecodeTestCustom(("Array[Array[Integer]]",
+    Array(Array[Integer](1))))
+  { (l, r) => l._2(0)(0) == r._2(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Int]]",
+    Array(Array(1))))
+  { (l, r) => l._2(0)(0) == r._2(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Int]]",
+    Array(Array(Array(1)))))
+  { (l, r) => l._2(0)(0)(0) == r._2(0)(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Array[Int]]]",
+    Array(Array(Array(Array(1))))))
+  { (l, r) => l._2(0)(0)(0)(0) == r._2(0)(0)(0)(0) }
+
+  encodeDecodeTestCustom(("Array[Array[Array[Array[Int]]]]",
+    Array(Array(Array(Array(Array(1)))))))
+  { (l, r) => l._2(0)(0)(0)(0)(0) == r._2(0)(0)(0)(0)(0) }
+
+  encodeDecodeTest(("Array[Byte] null",
+    null: Array[Byte]))
+  encodeDecodeTestCustom(("Array[Byte]",
+    Array[Byte](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Int] null",
+    null: Array[Int]))
+  encodeDecodeTestCustom(("Array[Int]",
+    Array[Int](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Long] null",
+    null: Array[Long]))
+  encodeDecodeTestCustom(("Array[Long]",
+    Array[Long](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Double] null",
+    null: Array[Double]))
+  encodeDecodeTestCustom(("Array[Double]",
+    Array[Double](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Float] null",
+    null: Array[Float]))
+  encodeDecodeTestCustom(("Array[Float]",
+    Array[Float](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Boolean] null",
+    null: Array[Boolean]))
+  encodeDecodeTestCustom(("Array[Boolean]",
+    Array[Boolean](true, false)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTest(("Array[Short] null",
+    null: Array[Short]))
+  encodeDecodeTestCustom(("Array[Short]",
+    Array[Short](1, 2, 3)))
+    { (l, r) => util.Arrays.equals(l._2, r._2) }
+
+  encodeDecodeTestCustom(("java.sql.Timestamp",
+    new java.sql.Timestamp(1)))
+    { (l, r) => l._2.toString == r._2.toString }
+
+  encodeDecodeTestCustom(("java.sql.Date", new java.sql.Date(1)))
+    { (l, r) => l._2.toString == r._2.toString }
+
+  /** Simplified encodeDecodeTestCustom, where the comparison function can be `Object.equals`. */
+  protected def encodeDecodeTest[T <: Product : TypeTag](inputData: T) =
+    encodeDecodeTestCustom[T](inputData)((l, r) => l == r)
+
+  /**
+   * Constructs a test that round-trips `t` through an encoder, checking the results to ensure it
+   * matches the original.
+   */
+  protected def encodeDecodeTestCustom[T <: Product : TypeTag](
+      inputData: T)(
+      c: (T, T) => Boolean) = {
+    test(s"encode/decode: $inputData") {
+      val encoder = try ProductEncoder[T] catch {
+        case e: Exception =>
+          fail(s"Exception thrown generating encoder", e)
+      }
+      val convertedData = encoder.toRow(inputData)
+      val schema = encoder.schema.toAttributes
+      val boundEncoder = encoder.bind(schema)
+      val convertedBack = try boundEncoder.fromRow(convertedData) catch {
+        case e: Exception =>
+          fail(
+           s"""Exception thrown while decoding
+              |Converted: $convertedData
+              |Schema: ${schema.mkString(",")}
+              |${encoder.schema.treeString}
+              |
+              |Construct Expressions:
+              |${boundEncoder.constructExpression.treeString}
+              |
+            """.stripMargin, e)
+      }
+
+      if (!c(inputData, convertedBack)) {
+        val types =
+          convertedBack.productIterator.filter(_ != null).map(_.getClass.getName).mkString(",")
+
+        val encodedData = convertedData.toSeq(encoder.schema).zip(encoder.schema).map {
+          case (a: ArrayData, StructField(_, at: ArrayType, _, _)) =>
+            a.toArray[Any](at.elementType).toSeq
+          case (other, _) =>
+            other
+        }.mkString("[", ",", "]")
+
+        fail(
+          s"""Encoded/Decoded data does not match input data
+             |
+             |in:  $inputData
+             |out: $convertedBack
+             |types: $types
+             |
+             |Encoded Data: $encodedData
+             |Schema: ${schema.mkString(",")}
+             |${encoder.schema.treeString}
+             |
+             |Extract Expressions:
+             |${boundEncoder.extractExpressions.map(_.treeString).mkString("\n")}
+             |
+             |Construct Expressions:
+             |${boundEncoder.constructExpression.treeString}
+             |
+           """.stripMargin)
+      }
+    }
   }
 }

From e170c22160bb452f98c340489ebf8390116a8cbb Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Tue, 13 Oct 2015 17:11:22 -0700
Subject: [PATCH 229/896] [SPARK-11032] [SQL] correctly handle having

We should not stop resolving having when the having condtion is resolved, or something like `count(1)` will crash.

Author: Wenchen Fan <cloud0fan@163.com>

Closes #9105 from cloud-fan/having.
---
 .../apache/spark/sql/catalyst/analysis/Analyzer.scala    | 2 +-
 .../test/scala/org/apache/spark/sql/SQLQuerySuite.scala  | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index f5597a08d359..041ab2282739 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -553,7 +553,7 @@ class Analyzer(
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
       case filter @ Filter(havingCondition,
              aggregate @ Aggregate(grouping, originalAggExprs, child))
-          if aggregate.resolved && !filter.resolved =>
+          if aggregate.resolved =>
 
         // Try resolving the condition of the filter as though it is in the aggregate clause
         val aggregatedCondition =
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index eca6f1073889..636591630e13 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1809,4 +1809,13 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         df1.withColumn("diff", lit(0)))
     }
   }
+
+  test("SPARK-11032: resolve having correctly") {
+    withTempTable("src") {
+      Seq(1 -> "a").toDF("i", "j").registerTempTable("src")
+      checkAnswer(
+        sql("SELECT MIN(t.i) FROM (SELECT * FROM src WHERE i > 0) t HAVING(COUNT(1) > 0)"),
+        Row(1))
+    }
+  }
 }

From 15ff85b3163acbe8052d4489a00bcf1d2332fcf0 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Tue, 13 Oct 2015 17:59:32 -0700
Subject: [PATCH 230/896] [SPARK-11068] [SQL] add callback to query execution

With this feature, we can track the query plan, time cost, exception during query execution for spark users.

Author: Wenchen Fan <cloud0fan@163.com>

Closes #9078 from cloud-fan/callback.
---
 .../org/apache/spark/sql/DataFrame.scala      |  46 +++++-
 .../spark/sql/QueryExecutionListener.scala    | 136 ++++++++++++++++++
 .../org/apache/spark/sql/SQLContext.scala     |   3 +
 .../spark/sql/DataFrameCallbackSuite.scala    |  82 +++++++++++
 4 files changed, 261 insertions(+), 6 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 01f60aba87ed..bfe8d3c8ef95 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1344,7 +1344,9 @@ class DataFrame private[sql](
    * @group action
    * @since 1.3.0
    */
-  def head(n: Int): Array[Row] = limit(n).collect()
+  def head(n: Int): Array[Row] = withCallback("head", limit(n)) { df =>
+    df.collect(needCallback = false)
+  }
 
   /**
    * Returns the first row.
@@ -1414,8 +1416,18 @@ class DataFrame private[sql](
    * @group action
    * @since 1.3.0
    */
-  def collect(): Array[Row] = withNewExecutionId {
-    queryExecution.executedPlan.executeCollectPublic()
+  def collect(): Array[Row] = collect(needCallback = true)
+
+  private def collect(needCallback: Boolean): Array[Row] = {
+    def execute(): Array[Row] = withNewExecutionId {
+      queryExecution.executedPlan.executeCollectPublic()
+    }
+
+    if (needCallback) {
+      withCallback("collect", this)(_ => execute())
+    } else {
+      execute()
+    }
   }
 
   /**
@@ -1423,8 +1435,10 @@ class DataFrame private[sql](
    * @group action
    * @since 1.3.0
    */
-  def collectAsList(): java.util.List[Row] = withNewExecutionId {
-    java.util.Arrays.asList(rdd.collect() : _*)
+  def collectAsList(): java.util.List[Row] = withCallback("collectAsList", this) { _ =>
+    withNewExecutionId {
+      java.util.Arrays.asList(rdd.collect() : _*)
+    }
   }
 
   /**
@@ -1432,7 +1446,9 @@ class DataFrame private[sql](
    * @group action
    * @since 1.3.0
    */
-  def count(): Long = groupBy().count().collect().head.getLong(0)
+  def count(): Long = withCallback("count", groupBy().count()) { df =>
+    df.collect(needCallback = false).head.getLong(0)
+  }
 
   /**
    * Returns a new [[DataFrame]] that has exactly `numPartitions` partitions.
@@ -1936,6 +1952,24 @@ class DataFrame private[sql](
     SQLExecution.withNewExecutionId(sqlContext, queryExecution)(body)
   }
 
+  /**
+   * Wrap a DataFrame action to track the QueryExecution and time cost, then report to the
+   * user-registered callback functions.
+   */
+  private def withCallback[T](name: String, df: DataFrame)(action: DataFrame => T) = {
+    try {
+      val start = System.nanoTime()
+      val result = action(df)
+      val end = System.nanoTime()
+      sqlContext.listenerManager.onSuccess(name, df.queryExecution, end - start)
+      result
+    } catch {
+      case e: Exception =>
+        sqlContext.listenerManager.onFailure(name, df.queryExecution, e)
+        throw e
+    }
+  }
+
   ////////////////////////////////////////////////////////////////////////////
   ////////////////////////////////////////////////////////////////////////////
   // End of deprecated methods
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala
new file mode 100644
index 000000000000..14fbebb45f8b
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala
@@ -0,0 +1,136 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import java.util.concurrent.locks.ReentrantReadWriteLock
+import scala.collection.mutable.ListBuffer
+
+import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.Logging
+import org.apache.spark.sql.execution.QueryExecution
+
+
+/**
+ * The interface of query execution listener that can be used to analyze execution metrics.
+ *
+ * Note that implementations should guarantee thread-safety as they will be used in a non
+ * thread-safe way.
+ */
+@Experimental
+trait QueryExecutionListener {
+
+  /**
+   * A callback function that will be called when a query executed successfully.
+   * Implementations should guarantee thread-safe.
+   *
+   * @param funcName the name of the action that triggered this query.
+   * @param qe the QueryExecution object that carries detail information like logical plan,
+   *           physical plan, etc.
+   * @param duration the execution time for this query in nanoseconds.
+   */
+  @DeveloperApi
+  def onSuccess(funcName: String, qe: QueryExecution, duration: Long)
+
+  /**
+   * A callback function that will be called when a query execution failed.
+   * Implementations should guarantee thread-safe.
+   *
+   * @param funcName the name of the action that triggered this query.
+   * @param qe the QueryExecution object that carries detail information like logical plan,
+   *           physical plan, etc.
+   * @param exception the exception that failed this query.
+   */
+  @DeveloperApi
+  def onFailure(funcName: String, qe: QueryExecution, exception: Exception)
+}
+
+@Experimental
+class ExecutionListenerManager extends Logging {
+  private[this] val listeners = ListBuffer.empty[QueryExecutionListener]
+  private[this] val lock = new ReentrantReadWriteLock()
+
+  /** Acquires a read lock on the cache for the duration of `f`. */
+  private def readLock[A](f: => A): A = {
+    val rl = lock.readLock()
+    rl.lock()
+    try f finally {
+      rl.unlock()
+    }
+  }
+
+  /** Acquires a write lock on the cache for the duration of `f`. */
+  private def writeLock[A](f: => A): A = {
+    val wl = lock.writeLock()
+    wl.lock()
+    try f finally {
+      wl.unlock()
+    }
+  }
+
+  /**
+   * Registers the specified QueryExecutionListener.
+   */
+  @DeveloperApi
+  def register(listener: QueryExecutionListener): Unit = writeLock {
+    listeners += listener
+  }
+
+  /**
+   * Unregisters the specified QueryExecutionListener.
+   */
+  @DeveloperApi
+  def unregister(listener: QueryExecutionListener): Unit = writeLock {
+    listeners -= listener
+  }
+
+  /**
+   * clears out all registered QueryExecutionListeners.
+   */
+  @DeveloperApi
+  def clear(): Unit = writeLock {
+    listeners.clear()
+  }
+
+  private[sql] def onSuccess(
+      funcName: String,
+      qe: QueryExecution,
+      duration: Long): Unit = readLock {
+    withErrorHandling { listener =>
+      listener.onSuccess(funcName, qe, duration)
+    }
+  }
+
+  private[sql] def onFailure(
+      funcName: String,
+      qe: QueryExecution,
+      exception: Exception): Unit = readLock {
+    withErrorHandling { listener =>
+      listener.onFailure(funcName, qe, exception)
+    }
+  }
+
+  private def withErrorHandling(f: QueryExecutionListener => Unit): Unit = {
+    for (listener <- listeners) {
+      try {
+        f(listener)
+      } catch {
+        case e: Exception => logWarning("error executing query execution listener", e)
+      }
+    }
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index cd937257d31a..a835408f8af3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -177,6 +177,9 @@ class SQLContext private[sql](
    */
   def getAllConfs: immutable.Map[String, String] = conf.getAllConfs
 
+  @transient
+  lazy val listenerManager: ExecutionListenerManager = new ExecutionListenerManager
+
   @transient
   protected[sql] lazy val catalog: Catalog = new SimpleCatalog(conf)
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala
new file mode 100644
index 000000000000..4e286a007620
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import org.apache.spark.SparkException
+import org.apache.spark.sql.catalyst.plans.logical.{Aggregate, Project}
+import org.apache.spark.sql.execution.QueryExecution
+import org.apache.spark.sql.test.SharedSQLContext
+
+import scala.collection.mutable.ArrayBuffer
+
+class DataFrameCallbackSuite extends QueryTest with SharedSQLContext {
+  import testImplicits._
+  import functions._
+
+  test("execute callback functions when a DataFrame action finished successfully") {
+    val metrics = ArrayBuffer.empty[(String, QueryExecution, Long)]
+    val listener = new QueryExecutionListener {
+      // Only test successful case here, so no need to implement `onFailure`
+      override def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit = {}
+
+      override def onSuccess(funcName: String, qe: QueryExecution, duration: Long): Unit = {
+        metrics += ((funcName, qe, duration))
+      }
+    }
+    sqlContext.listenerManager.register(listener)
+
+    val df = Seq(1 -> "a").toDF("i", "j")
+    df.select("i").collect()
+    df.filter($"i" > 0).count()
+
+    assert(metrics.length == 2)
+
+    assert(metrics(0)._1 == "collect")
+    assert(metrics(0)._2.analyzed.isInstanceOf[Project])
+    assert(metrics(0)._3 > 0)
+
+    assert(metrics(1)._1 == "count")
+    assert(metrics(1)._2.analyzed.isInstanceOf[Aggregate])
+    assert(metrics(1)._3 > 0)
+  }
+
+  test("execute callback functions when a DataFrame action failed") {
+    val metrics = ArrayBuffer.empty[(String, QueryExecution, Exception)]
+    val listener = new QueryExecutionListener {
+      override def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit = {
+        metrics += ((funcName, qe, exception))
+      }
+
+      // Only test failed case here, so no need to implement `onSuccess`
+      override def onSuccess(funcName: String, qe: QueryExecution, duration: Long): Unit = {}
+    }
+    sqlContext.listenerManager.register(listener)
+
+    val errorUdf = udf[Int, Int] { _ => throw new RuntimeException("udf error") }
+    val df = sparkContext.makeRDD(Seq(1 -> "a")).toDF("i", "j")
+
+    // Ignore the log when we are expecting an exception.
+    sparkContext.setLogLevel("FATAL")
+    val e = intercept[SparkException](df.select(errorUdf($"i")).collect())
+
+    assert(metrics.length == 1)
+    assert(metrics(0)._1 == "collect")
+    assert(metrics(0)._2.analyzed.isInstanceOf[Project])
+    assert(metrics(0)._3.getMessage == e.getMessage)
+  }
+}

From ce3f9a80657751ee0bc0ed6a9b6558acbb40af4f Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 13 Oct 2015 18:21:24 -0700
Subject: [PATCH 231/896] [SPARK-11091] [SQL] Change spark.sql.canonicalizeView
 to spark.sql.nativeView.

https://issues.apache.org/jira/browse/SPARK-11091

Author: Yin Huai <yhuai@databricks.com>

Closes #9103 from yhuai/SPARK-11091.
---
 .../main/scala/org/apache/spark/sql/SQLConf.scala  |  4 ++--
 .../spark/sql/hive/HiveMetastoreCatalog.scala      |  2 +-
 .../scala/org/apache/spark/sql/hive/HiveQl.scala   |  2 +-
 .../spark/sql/hive/execution/SQLQuerySuite.scala   | 14 +++++++-------
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index f62df9bdebcc..b08cc8e83073 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -328,7 +328,7 @@ private[spark] object SQLConf {
     doc = "When true, some predicates will be pushed down into the Hive metastore so that " +
           "unmatching partitions can be eliminated earlier.")
 
-  val CANONICALIZE_VIEW = booleanConf("spark.sql.canonicalizeView",
+  val NATIVE_VIEW = booleanConf("spark.sql.nativeView",
     defaultValue = Some(false),
     doc = "When true, CREATE VIEW will be handled by Spark SQL instead of Hive native commands.  " +
           "Note that this function is experimental and should ony be used when you are using " +
@@ -489,7 +489,7 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def metastorePartitionPruning: Boolean = getConf(HIVE_METASTORE_PARTITION_PRUNING)
 
-  private[spark] def canonicalizeView: Boolean = getConf(CANONICALIZE_VIEW)
+  private[spark] def nativeView: Boolean = getConf(NATIVE_VIEW)
 
   private[spark] def sortMergeJoinEnabled: Boolean = getConf(SORTMERGE_JOIN)
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index cf59bc0d590b..1f8223e1ff50 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -591,7 +591,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       case p: LogicalPlan if p.resolved => p
 
       case CreateViewAsSelect(table, child, allowExisting, replace, sql) =>
-        if (conf.canonicalizeView) {
+        if (conf.nativeView) {
           if (allowExisting && replace) {
             throw new AnalysisException(
               "It is not allowed to define a view with both IF NOT EXISTS and OR REPLACE.")
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 250c23285688..1d505019400b 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -537,7 +537,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       serde = None,
       viewText = Some(originalText))
 
-    // We need to keep the original SQL string so that if `spark.sql.canonicalizeView` is
+    // We need to keep the original SQL string so that if `spark.sql.nativeView` is
     // false, we can fall back to use hive native command later.
     // We can remove this when parser is configurable(can access SQLConf) in the future.
     val sql = context.getTokenRewriteStream
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 51b63f368878..6aa34605b05a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1282,7 +1282,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   }
 
   test("correctly parse CREATE VIEW statement") {
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt") {
         val df = (1 until 10).map(i => i -> i).toDF("i", "j")
         df.write.format("json").saveAsTable("jt")
@@ -1299,7 +1299,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   }
 
   test("correctly handle CREATE VIEW IF NOT EXISTS") {
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt", "jt2") {
         sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
         sql("CREATE VIEW testView AS SELECT id FROM jt")
@@ -1316,7 +1316,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   }
 
   test("correctly handle CREATE OR REPLACE VIEW") {
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt", "jt2") {
         sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
         sql("CREATE OR REPLACE VIEW testView AS SELECT id FROM jt")
@@ -1339,7 +1339,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   }
 
   test("correctly handle ALTER VIEW") {
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt", "jt2") {
         sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
         sql("CREATE VIEW testView AS SELECT id FROM jt")
@@ -1357,7 +1357,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
   test("create hive view for json table") {
     // json table is not hive-compatible, make sure the new flag fix it.
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt") {
         sqlContext.range(1, 10).write.format("json").saveAsTable("jt")
         sql("CREATE VIEW testView AS SELECT id FROM jt")
@@ -1369,7 +1369,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
   test("create hive view for partitioned parquet table") {
     // partitioned parquet table is not hive-compatible, make sure the new flag fix it.
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("parTable") {
         val df = Seq(1 -> "a").toDF("i", "j")
         df.write.format("parquet").partitionBy("i").saveAsTable("parTable")
@@ -1382,7 +1382,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
   test("create hive view for joined tables") {
     // make sure the new flag can handle some complex cases like join and schema change.
-    withSQLConf(SQLConf.CANONICALIZE_VIEW.key -> "true") {
+    withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt1", "jt2") {
         sqlContext.range(1, 10).toDF("id1").write.format("json").saveAsTable("jt1")
         sqlContext.range(1, 10).toDF("id2").write.format("json").saveAsTable("jt2")

From 8b32885704502ab2a715cf5142d7517181074428 Mon Sep 17 00:00:00 2001
From: Monica Liu <liu.monica.f@gmail.com>
Date: Tue, 13 Oct 2015 22:24:52 -0700
Subject: [PATCH 232/896] [SPARK-10981] [SPARKR] SparkR Join improvements

I was having issues with collect() and orderBy() in Spark 1.5.0 so I used the DataFrame.R file and test_sparkSQL.R file from the Spark 1.5.1 download. I only modified the join() function in DataFrame.R to include "full", "fullouter", "left", "right", and "leftsemi" and added corresponding test cases in the test for join() and merge() in test_sparkSQL.R file.
Pull request because I filed this JIRA bug report:
https://issues.apache.org/jira/browse/SPARK-10981

Author: Monica Liu <liu.monica.f@gmail.com>

Closes #9029 from mfliu/master.
---
 R/pkg/R/DataFrame.R              | 13 +++++++++----
 R/pkg/inst/tests/test_sparkSQL.R | 27 +++++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index e0ce05624358..b7f5f978ebc2 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1414,9 +1414,10 @@ setMethod("where",
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @param joinExpr (Optional) The expression used to perform the join. joinExpr must be a
-#' Column expression. If joinExpr is omitted, join() wil perform a Cartesian join
+#' Column expression. If joinExpr is omitted, join() will perform a Cartesian join
 #' @param joinType The type of join to perform. The following join types are available:
-#' 'inner', 'outer', 'left_outer', 'right_outer', 'semijoin'. The default joinType is "inner".
+#' 'inner', 'outer', 'full', 'fullouter', leftouter', 'left_outer', 'left',
+#' 'right_outer', 'rightouter', 'right', and 'leftsemi'. The default joinType is "inner".
 #' @return A DataFrame containing the result of the join operation.
 #' @rdname join
 #' @name join
@@ -1441,11 +1442,15 @@ setMethod("join",
               if (is.null(joinType)) {
                 sdf <- callJMethod(x@sdf, "join", y@sdf, joinExpr@jc)
               } else {
-                if (joinType %in% c("inner", "outer", "left_outer", "right_outer", "semijoin")) {
+                if (joinType %in% c("inner", "outer", "full", "fullouter",
+                    "leftouter", "left_outer", "left",
+                    "rightouter", "right_outer", "right", "leftsemi")) {
+                  joinType <- gsub("_", "", joinType)
                   sdf <- callJMethod(x@sdf, "join", y@sdf, joinExpr@jc, joinType)
                 } else {
                   stop("joinType must be one of the following types: ",
-                       "'inner', 'outer', 'left_outer', 'right_outer', 'semijoin'")
+                      "'inner', 'outer', 'full', 'fullouter', 'leftouter', 'left_outer', 'left',
+                      'rightouter', 'right_outer', 'right', 'leftsemi'")
                 }
               }
             }
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index d5509e475de0..46cab7646dcf 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1071,7 +1071,7 @@ test_that("join() and merge() on a DataFrame", {
   expect_equal(names(joined2), c("age", "name", "name", "test"))
   expect_equal(count(joined2), 3)
 
-  joined3 <- join(df, df2, df$name == df2$name, "right_outer")
+  joined3 <- join(df, df2, df$name == df2$name, "rightouter")
   expect_equal(names(joined3), c("age", "name", "name", "test"))
   expect_equal(count(joined3), 4)
   expect_true(is.na(collect(orderBy(joined3, joined3$age))$age[2]))
@@ -1082,11 +1082,34 @@ test_that("join() and merge() on a DataFrame", {
   expect_equal(count(joined4), 4)
   expect_equal(collect(orderBy(joined4, joined4$name))$newAge[3], 24)
 
+  joined5 <- join(df, df2, df$name == df2$name, "leftouter")
+  expect_equal(names(joined5), c("age", "name", "name", "test"))
+  expect_equal(count(joined5), 3)
+  expect_true(is.na(collect(orderBy(joined5, joined5$age))$age[1]))
+
+  joined6 <- join(df, df2, df$name == df2$name, "inner")
+  expect_equal(names(joined6), c("age", "name", "name", "test"))
+  expect_equal(count(joined6), 3)
+
+  joined7 <- join(df, df2, df$name == df2$name, "leftsemi")
+  expect_equal(names(joined7), c("age", "name"))
+  expect_equal(count(joined7), 3)
+
+  joined8 <- join(df, df2, df$name == df2$name, "left_outer")
+  expect_equal(names(joined8), c("age", "name", "name", "test"))
+  expect_equal(count(joined8), 3)
+  expect_true(is.na(collect(orderBy(joined8, joined8$age))$age[1]))
+
+  joined9 <- join(df, df2, df$name == df2$name, "right_outer")
+  expect_equal(names(joined9), c("age", "name", "name", "test"))
+  expect_equal(count(joined9), 4)
+  expect_true(is.na(collect(orderBy(joined9, joined9$age))$age[2]))
+
   merged <- select(merge(df, df2, df$name == df2$name, "outer"),
                    alias(df$age + 5, "newAge"), df$name, df2$test)
   expect_equal(names(merged), c("newAge", "name", "test"))
   expect_equal(count(merged), 4)
-  expect_equal(collect(orderBy(merged, joined4$name))$newAge[3], 24)
+  expect_equal(collect(orderBy(merged, merged$name))$newAge[3], 24)
 })
 
 test_that("toJSON() returns an RDD of the correct values", {

From 390b22fad69a33eb6daee25b6b858a2e768670a5 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Tue, 13 Oct 2015 22:31:23 -0700
Subject: [PATCH 233/896] [SPARK-10996] [SPARKR] Implement sampleBy() in
 DataFrameStatFunctions.

Author: Sun Rui <rui.sun@intel.com>

Closes #9023 from sun-rui/SPARK-10996.
---
 R/pkg/NAMESPACE                  |  3 ++-
 R/pkg/R/DataFrame.R              | 14 ++++++--------
 R/pkg/R/generics.R               |  6 +++++-
 R/pkg/R/sparkR.R                 | 12 +++---------
 R/pkg/R/stats.R                  | 32 ++++++++++++++++++++++++++++++++
 R/pkg/R/utils.R                  | 18 ++++++++++++++++++
 R/pkg/inst/tests/test_sparkSQL.R | 10 ++++++++++
 7 files changed, 76 insertions(+), 19 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index ed9cd94e03b1..52f7a0106aae 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -65,6 +65,7 @@ exportMethods("arrange",
               "repartition",
               "sample",
               "sample_frac",
+              "sampleBy",
               "saveAsParquetFile",
               "saveAsTable",
               "saveDF",
@@ -254,4 +255,4 @@ export("structField",
        "structType.structField",
        "print.structType")
 
-export("as.data.frame")
\ No newline at end of file
+export("as.data.frame")
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index b7f5f978ebc2..993be82a47f7 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1831,17 +1831,15 @@ setMethod("fillna",
               if (length(colNames) == 0 || !all(colNames != "")) {
                 stop("value should be an a named list with each name being a column name.")
               }
-
-              # Convert to the named list to an environment to be passed to JVM
-              valueMap <- new.env()
-              for (col in colNames) {
-                # Check each item in the named list is of valid type
-                v <- value[[col]]
+              # Check each item in the named list is of valid type
+              lapply(value, function(v) {
                 if (!(class(v) %in% c("integer", "numeric", "character"))) {
                   stop("Each item in value should be an integer, numeric or charactor.")
                 }
-                valueMap[[col]] <- v
-              }
+              })
+
+              # Convert to the named list to an environment to be passed to JVM
+              valueMap <- convertNamedListToEnv(value)
 
               # When value is a named list, caller is expected not to pass in cols
               if (!is.null(cols)) {
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index c106a0024583..4a419f785e92 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -509,6 +509,10 @@ setGeneric("sample",
 setGeneric("sample_frac",
            function(x, withReplacement, fraction, seed) { standardGeneric("sample_frac") })
 
+#' @rdname statfunctions
+#' @export
+setGeneric("sampleBy", function(x, col, fractions, seed) { standardGeneric("sampleBy") })
+
 #' @rdname saveAsParquetFile
 #' @export
 setGeneric("saveAsParquetFile", function(x, path) { standardGeneric("saveAsParquetFile") })
@@ -1006,4 +1010,4 @@ setGeneric("as.data.frame")
 
 #' @rdname attach
 #' @export
-setGeneric("attach")
\ No newline at end of file
+setGeneric("attach")
diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index cc47110f5473..9cf2f1a361cf 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -163,19 +163,13 @@ sparkR.init <- function(
     sparkHome <- suppressWarnings(normalizePath(sparkHome))
   }
 
-  sparkEnvirMap <- new.env()
-  for (varname in names(sparkEnvir)) {
-    sparkEnvirMap[[varname]] <- sparkEnvir[[varname]]
-  }
+  sparkEnvirMap <- convertNamedListToEnv(sparkEnvir)
 
-  sparkExecutorEnvMap <- new.env()
-  if (!any(names(sparkExecutorEnv) == "LD_LIBRARY_PATH")) {
+  sparkExecutorEnvMap <- convertNamedListToEnv(sparkExecutorEnv)
+  if(is.null(sparkExecutorEnvMap$LD_LIBRARY_PATH)) {
     sparkExecutorEnvMap[["LD_LIBRARY_PATH"]] <-
       paste0("$LD_LIBRARY_PATH:",Sys.getenv("LD_LIBRARY_PATH"))
   }
-  for (varname in names(sparkExecutorEnv)) {
-    sparkExecutorEnvMap[[varname]] <- sparkExecutorEnv[[varname]]
-  }
 
   nonEmptyJars <- Filter(function(x) { x != "" }, jars)
   localJarPaths <- lapply(nonEmptyJars,
diff --git a/R/pkg/R/stats.R b/R/pkg/R/stats.R
index 4928cf4d4367..f79329b11540 100644
--- a/R/pkg/R/stats.R
+++ b/R/pkg/R/stats.R
@@ -127,3 +127,35 @@ setMethod("freqItems", signature(x = "DataFrame", cols = "character"),
             sct <- callJMethod(statFunctions, "freqItems", as.list(cols), support)
             collect(dataFrame(sct))
           })
+
+#' sampleBy
+#'
+#' Returns a stratified sample without replacement based on the fraction given on each stratum.
+#' 
+#' @param x A SparkSQL DataFrame
+#' @param col column that defines strata
+#' @param fractions A named list giving sampling fraction for each stratum. If a stratum is
+#'                  not specified, we treat its fraction as zero.
+#' @param seed random seed
+#' @return A new DataFrame that represents the stratified sample
+#'
+#' @rdname statfunctions
+#' @name sampleBy
+#' @export
+#' @examples
+#'\dontrun{
+#' df <- jsonFile(sqlContext, "/path/to/file.json")
+#' sample <- sampleBy(df, "key", fractions, 36)
+#' }
+setMethod("sampleBy",
+          signature(x = "DataFrame", col = "character",
+                    fractions = "list", seed = "numeric"),
+          function(x, col, fractions, seed) {
+            fractionsEnv <- convertNamedListToEnv(fractions)
+
+            statFunctions <- callJMethod(x@sdf, "stat")
+            # Seed is expected to be Long on Scala side, here convert it to an integer
+            # due to SerDe limitation now.
+            sdf <- callJMethod(statFunctions, "sampleBy", col, fractionsEnv, as.integer(seed))
+            dataFrame(sdf)
+          })
diff --git a/R/pkg/R/utils.R b/R/pkg/R/utils.R
index 94f16c7ac52c..0b9e2957fe9a 100644
--- a/R/pkg/R/utils.R
+++ b/R/pkg/R/utils.R
@@ -605,3 +605,21 @@ structToList <- function(struct) {
   class(struct) <- "list"
   struct
 }
+
+# Convert a named list to an environment to be passed to JVM
+convertNamedListToEnv <- function(namedList) {
+  # Make sure each item in the list has a name
+  names <- names(namedList)
+  stopifnot(
+    if (is.null(names)) {
+      length(namedList) == 0
+    } else {
+      !any(is.na(names))
+    })
+
+  env <- new.env()
+  for (name in names) {
+    env[[name]] <- namedList[[name]]
+  }
+  env
+}
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 46cab7646dcf..e1b42b080493 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1416,6 +1416,16 @@ test_that("freqItems() on a DataFrame", {
   expect_identical(result[[2]], list(list(-1, -99)))
 })
 
+test_that("sampleBy() on a DataFrame", {
+  l <- lapply(c(0:99), function(i) { as.character(i %% 3) })
+  df <- createDataFrame(sqlContext, l, "key")
+  fractions <- list("0" = 0.1, "1" = 0.2)
+  sample <- sampleBy(df, "key", fractions, 0)
+  result <- collect(orderBy(count(groupBy(sample, "key")), "key"))
+  expect_identical(as.list(result[1, ]), list(key = "0", count = 2))
+  expect_identical(as.list(result[2, ]), list(key = "1", count = 10))
+})
+
 test_that("SQL error message is returned from JVM", {
   retError <- tryCatch(sql(sqlContext, "select * from blah"), error = function(e) e)
   expect_equal(grepl("Table Not Found: blah", retError), TRUE)

From 135a2ce5b0b927b512c832d61c25e7b9d57e30be Mon Sep 17 00:00:00 2001
From: Tom Graves <tgraves@yahoo-inc.com>
Date: Wed, 14 Oct 2015 10:12:25 -0700
Subject: [PATCH 234/896] [SPARK-10619] Can't sort columns on Executor Page

should pick into spark 1.5.2 also.

https://issues.apache.org/jira/browse/SPARK-10619

looks like this was broken by commit: https://github.com/apache/spark/commit/fb1d06fc242ec00320f1a3049673fbb03c4a6eb9#diff-b8adb646ef90f616c34eb5c98d1ebd16
It looks like somethings were change to use the UIUtils.listingTable but executor page wasn't converted so when it removed sortable from the UIUtils. TABLE_CLASS_NOT_STRIPED it broke this page.

Simply add the sortable tag back in and it fixes both active UI and the history server UI.

Author: Tom Graves <tgraves@yahoo-inc.com>

Closes #9101 from tgravescs/SPARK-10619.
---
 core/src/main/scala/org/apache/spark/ui/UIUtils.scala           | 1 +
 .../src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala | 2 +-
 .../src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala | 2 +-
 .../main/scala/org/apache/spark/streaming/ui/BatchPage.scala    | 2 +-
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
index 21dc8f0b6548..68a9f912a5d2 100644
--- a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
+++ b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
@@ -31,6 +31,7 @@ import org.apache.spark.ui.scope.RDDOperationGraph
 private[spark] object UIUtils extends Logging {
   val TABLE_CLASS_NOT_STRIPED = "table table-bordered table-condensed"
   val TABLE_CLASS_STRIPED = TABLE_CLASS_NOT_STRIPED + " table-striped"
+  val TABLE_CLASS_STRIPED_SORTABLE = TABLE_CLASS_STRIPED + " sortable"
 
   // SimpleDateFormat is not thread-safe. Don't expose it to avoid improper use.
   private val dateFormat = new ThreadLocal[SimpleDateFormat]() {
diff --git a/core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala b/core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala
index 01cddda4c62c..1a29b0f41260 100644
--- a/core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/exec/ExecutorsPage.scala
@@ -62,7 +62,7 @@ private[ui] class ExecutorsPage(
     val logsExist = execInfo.filter(_.executorLogs.nonEmpty).nonEmpty
 
     val execTable =
-      <table class={UIUtils.TABLE_CLASS_STRIPED}>
+      <table class={UIUtils.TABLE_CLASS_STRIPED_SORTABLE}>
         <thead>
           <th>Executor ID</th>
           <th>Address</th>
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala b/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
index d5cdbfac104f..be144f6065ba 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
@@ -50,7 +50,7 @@ private[ui] class ExecutorTable(stageId: Int, stageAttemptId: Int, parent: Stage
         hasBytesSpilled = data.hasBytesSpilled
     })
 
-    <table class={UIUtils.TABLE_CLASS_STRIPED}>
+    <table class={UIUtils.TABLE_CLASS_STRIPED_SORTABLE}>
       <thead>
         <th>Executor ID</th>
         <th>Address</th>
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
index 1b717b64542d..a19b85a51d28 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
@@ -443,7 +443,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
   }
 
   def generateInputMetadataTable(inputMetadatas: Seq[(Int, String)]): Seq[Node] = {
-    <table class={SparkUIUtils.TABLE_CLASS_STRIPED}>
+    <table class={SparkUIUtils.TABLE_CLASS_STRIPED_SORTABLE}>
       <thead>
         <tr>
           <th>Input</th>

From 31f315981709251d5d26c508a3dc62cf0e6f87e1 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 14 Oct 2015 10:25:09 -0700
Subject: [PATCH 235/896] [SPARK-11040] [NETWORK] Make sure SASL handler
 delegates all events.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9053 from vanzin/SPARK-11040.
---
 .../spark/network/sasl/SaslRpcHandler.java    | 13 +++++++++++--
 .../server/TransportRequestHandler.java       |  8 +++++++-
 .../spark/network/sasl/SparkSaslSuite.java    | 19 +++++++++++++++++++
 3 files changed, 37 insertions(+), 3 deletions(-)

diff --git a/network/common/src/main/java/org/apache/spark/network/sasl/SaslRpcHandler.java b/network/common/src/main/java/org/apache/spark/network/sasl/SaslRpcHandler.java
index 3f2ebe32887b..7033adb9cae6 100644
--- a/network/common/src/main/java/org/apache/spark/network/sasl/SaslRpcHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/sasl/SaslRpcHandler.java
@@ -115,9 +115,18 @@ public StreamManager getStreamManager() {
 
   @Override
   public void connectionTerminated(TransportClient client) {
-    if (saslServer != null) {
-      saslServer.dispose();
+    try {
+      delegate.connectionTerminated(client);
+    } finally {
+      if (saslServer != null) {
+        saslServer.dispose();
+      }
     }
   }
 
+  @Override
+  public void exceptionCaught(Throwable cause, TransportClient client) {
+    delegate.exceptionCaught(cause, client);
+  }
+
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
index 96941d26be19..9b8b047b49a8 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
@@ -76,7 +76,13 @@ public void exceptionCaught(Throwable cause) {
 
   @Override
   public void channelUnregistered() {
-    streamManager.connectionTerminated(channel);
+    if (streamManager != null) {
+      try {
+        streamManager.connectionTerminated(channel);
+      } catch (RuntimeException e) {
+        logger.error("StreamManager connectionTerminated() callback failed.", e);
+      }
+    }
     rpcHandler.connectionTerminated(reverseClient);
   }
 
diff --git a/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java b/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
index 8104004847a2..3469e84e7f4d 100644
--- a/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
@@ -153,6 +153,8 @@ public Void answer(InvocationOnMock invocation) {
       assertEquals("Pong", new String(response, StandardCharsets.UTF_8));
     } finally {
       ctx.close();
+      // There should be 2 terminated events; one for the client, one for the server.
+      verify(rpcHandler, times(2)).connectionTerminated(any(TransportClient.class));
     }
   }
 
@@ -334,6 +336,23 @@ public void testDataEncryptionIsActuallyEnabled() throws Exception {
     }
   }
 
+  @Test
+  public void testRpcHandlerDelegate() throws Exception {
+    // Tests all delegates exception for receive(), which is more complicated and already handled
+    // by all other tests.
+    RpcHandler handler = mock(RpcHandler.class);
+    RpcHandler saslHandler = new SaslRpcHandler(null, null, handler, null);
+
+    saslHandler.getStreamManager();
+    verify(handler).getStreamManager();
+
+    saslHandler.connectionTerminated(null);
+    verify(handler).connectionTerminated(any(TransportClient.class));
+
+    saslHandler.exceptionCaught(null, null);
+    verify(handler).exceptionCaught(any(Throwable.class), any(TransportClient.class));
+  }
+
   private static class SaslTestCtx {
 
     final TransportClient client;

From 7e1308d37f6ca35f063e67e4b87a77e932ad89a5 Mon Sep 17 00:00:00 2001
From: Huaxin Gao <huaxing@us.ibm.com>
Date: Wed, 14 Oct 2015 12:31:29 -0700
Subject: [PATCH 236/896] [SPARK-8386] [SQL] add write.mode for insertIntoJDBC
 when the parm overwrite is false

the fix is for jira https://issues.apache.org/jira/browse/SPARK-8386

Author: Huaxin Gao <huaxing@us.ibm.com>

Closes #9042 from huaxingao/spark8386.
---
 sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index bfe8d3c8ef95..174bc6f42ad8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1674,7 +1674,7 @@ class DataFrame private[sql](
    */
   @deprecated("Use write.jdbc()", "1.4.0")
   def insertIntoJDBC(url: String, table: String, overwrite: Boolean): Unit = {
-    val w = if (overwrite) write.mode(SaveMode.Overwrite) else write
+    val w = if (overwrite) write.mode(SaveMode.Overwrite) else write.mode(SaveMode.Append)
     w.jdbc(url, table, new Properties)
   }
 

From 615cc858cf913522059b6ebdde65f0204f4fb030 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 14 Oct 2015 12:36:31 -0700
Subject: [PATCH 237/896] [SPARK-10973]

Close #9064
Close #9063
Close #9062

These pull requests were merged into branch-1.5, branch-1.4, and branch-1.3.

From cf2e0ae7205443f052463e8cb9334ae2b6df2d0e Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 14 Oct 2015 12:41:02 -0700
Subject: [PATCH 238/896] [SPARK-11096] Post-hoc review Netty based RPC
 implementation - round 2

A few more changes:

1. Renamed IDVerifier -> RpcEndpointVerifier
2. Renamed NettyRpcAddress -> RpcEndpointAddress
3. Simplified NettyRpcHandler a bit by removing the connection count tracking. This is OK because I now force spark.shuffle.io.numConnectionsPerPeer to 1
4. Reduced spark.rpc.connect.threads to 64. It would be great to eventually remove this extra thread pool.
5. Minor cleanup & documentation.

Author: Reynold Xin <rxin@databricks.com>

Closes #9112 from rxin/SPARK-11096.
---
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |   9 --
 .../apache/spark/rpc/netty/Dispatcher.scala   |   7 +-
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 114 +++++++-----------
 ...Address.scala => RpcEndpointAddress.scala} |  32 ++---
 ...rifier.scala => RpcEndpointVerifier.scala} |  21 ++--
 .../rpc/netty/NettyRpcAddressSuite.scala      |   2 +-
 .../rpc/netty/NettyRpcHandlerSuite.scala      |   3 -
 7 files changed, 81 insertions(+), 107 deletions(-)
 rename core/src/main/scala/org/apache/spark/rpc/netty/{NettyRpcAddress.scala => RpcEndpointAddress.scala} (65%)
 rename core/src/main/scala/org/apache/spark/rpc/netty/{IDVerifier.scala => RpcEndpointVerifier.scala} (65%)

diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index ef491a0ae4f0..2c4a8b9a0a87 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -93,15 +93,6 @@ private[spark] abstract class RpcEnv(conf: SparkConf) {
     defaultLookupTimeout.awaitResult(asyncSetupEndpointRefByURI(uri))
   }
 
-  /**
-   * Retrieve the [[RpcEndpointRef]] represented by `systemName`, `address` and `endpointName`
-   * asynchronously.
-   */
-  def asyncSetupEndpointRef(
-      systemName: String, address: RpcAddress, endpointName: String): Future[RpcEndpointRef] = {
-    asyncSetupEndpointRefByURI(uriOf(systemName, address, endpointName))
-  }
-
   /**
    * Retrieve the [[RpcEndpointRef]] represented by `systemName`, `address` and `endpointName`.
    * This is a blocking action.
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
index 398e9eafc144..f1a8273f157e 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -29,6 +29,9 @@ import org.apache.spark.network.client.RpcResponseCallback
 import org.apache.spark.rpc._
 import org.apache.spark.util.ThreadUtils
 
+/**
+ * A message dispatcher, responsible for routing RPC messages to the appropriate endpoint(s).
+ */
 private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
 
   private class EndpointData(
@@ -42,7 +45,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
   private val endpointRefs = new ConcurrentHashMap[RpcEndpoint, RpcEndpointRef]
 
   // Track the receivers whose inboxes may contain messages.
-  private val receivers = new LinkedBlockingQueue[EndpointData]()
+  private val receivers = new LinkedBlockingQueue[EndpointData]
 
   /**
    * True if the dispatcher has been stopped. Once stopped, all messages posted will be bounced
@@ -52,7 +55,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
   private var stopped = false
 
   def registerRpcEndpoint(name: String, endpoint: RpcEndpoint): NettyRpcEndpointRef = {
-    val addr = new NettyRpcAddress(nettyEnv.address.host, nettyEnv.address.port, name)
+    val addr = new RpcEndpointAddress(nettyEnv.address.host, nettyEnv.address.port, name)
     val endpointRef = new NettyRpcEndpointRef(nettyEnv.conf, addr, nettyEnv)
     synchronized {
       if (stopped) {
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 89b6df76c270..a2b28c524df9 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -22,7 +22,6 @@ import java.nio.ByteBuffer
 import java.util.concurrent._
 import javax.annotation.concurrent.GuardedBy
 
-import scala.collection.JavaConverters._
 import scala.collection.mutable
 import scala.concurrent.{Future, Promise}
 import scala.reflect.ClassTag
@@ -45,8 +44,10 @@ private[netty] class NettyRpcEnv(
     host: String,
     securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
 
-  private val transportConf =
-    SparkTransportConf.fromSparkConf(conf, conf.getInt("spark.rpc.io.threads", 0))
+  // Override numConnectionsPerPeer to 1 for RPC.
+  private val transportConf = SparkTransportConf.fromSparkConf(
+    conf.clone.set("spark.shuffle.io.numConnectionsPerPeer", "1"),
+    conf.getInt("spark.rpc.io.threads", 0))
 
   private val dispatcher: Dispatcher = new Dispatcher(this)
 
@@ -54,14 +55,14 @@ private[netty] class NettyRpcEnv(
     new TransportContext(transportConf, new NettyRpcHandler(dispatcher, this))
 
   private val clientFactory = {
-    val bootstraps: Seq[TransportClientBootstrap] =
+    val bootstraps: java.util.List[TransportClientBootstrap] =
       if (securityManager.isAuthenticationEnabled()) {
-        Seq(new SaslClientBootstrap(transportConf, "", securityManager,
+        java.util.Arrays.asList(new SaslClientBootstrap(transportConf, "", securityManager,
           securityManager.isSaslEncryptionEnabled()))
       } else {
-        Nil
+        java.util.Collections.emptyList[TransportClientBootstrap]
       }
-    transportContext.createClientFactory(bootstraps.asJava)
+    transportContext.createClientFactory(bootstraps)
   }
 
   val timeoutScheduler = ThreadUtils.newDaemonSingleThreadScheduledExecutor("netty-rpc-env-timeout")
@@ -71,7 +72,7 @@ private[netty] class NettyRpcEnv(
   // TODO: a non-blocking TransportClientFactory.createClient in future
   private val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
     "netty-rpc-connection",
-    conf.getInt("spark.rpc.connect.threads", 256))
+    conf.getInt("spark.rpc.connect.threads", 64))
 
   @volatile private var server: TransportServer = _
 
@@ -83,7 +84,8 @@ private[netty] class NettyRpcEnv(
         java.util.Collections.emptyList()
       }
     server = transportContext.createServer(port, bootstraps)
-    dispatcher.registerRpcEndpoint(IDVerifier.NAME, new IDVerifier(this, dispatcher))
+    dispatcher.registerRpcEndpoint(
+      RpcEndpointVerifier.NAME, new RpcEndpointVerifier(this, dispatcher))
   }
 
   override lazy val address: RpcAddress = {
@@ -96,11 +98,11 @@ private[netty] class NettyRpcEnv(
   }
 
   def asyncSetupEndpointRefByURI(uri: String): Future[RpcEndpointRef] = {
-    val addr = NettyRpcAddress(uri)
+    val addr = RpcEndpointAddress(uri)
     val endpointRef = new NettyRpcEndpointRef(conf, addr, this)
-    val idVerifierRef =
-      new NettyRpcEndpointRef(conf, NettyRpcAddress(addr.host, addr.port, IDVerifier.NAME), this)
-    idVerifierRef.ask[Boolean](ID(endpointRef.name)).flatMap { find =>
+    val verifier = new NettyRpcEndpointRef(
+      conf, RpcEndpointAddress(addr.host, addr.port, RpcEndpointVerifier.NAME), this)
+    verifier.ask[Boolean](RpcEndpointVerifier.CheckExistence(endpointRef.name)).flatMap { find =>
       if (find) {
         Future.successful(endpointRef)
       } else {
@@ -117,16 +119,18 @@ private[netty] class NettyRpcEnv(
   private[netty] def send(message: RequestMessage): Unit = {
     val remoteAddr = message.receiver.address
     if (remoteAddr == address) {
+      // Message to a local RPC endpoint.
       val promise = Promise[Any]()
       dispatcher.postLocalMessage(message, promise)
       promise.future.onComplete {
         case Success(response) =>
           val ack = response.asInstanceOf[Ack]
-          logDebug(s"Receive ack from ${ack.sender}")
+          logTrace(s"Received ack from ${ack.sender}")
         case Failure(e) =>
           logError(s"Exception when sending $message", e)
       }(ThreadUtils.sameThread)
     } else {
+      // Message to a remote RPC endpoint.
       try {
         // `createClient` will block if it cannot find a known connection, so we should run it in
         // clientConnectionExecutor
@@ -204,11 +208,10 @@ private[netty] class NettyRpcEnv(
           }
         })
       } catch {
-        case e: RejectedExecutionException => {
+        case e: RejectedExecutionException =>
           if (!promise.tryFailure(e)) {
             logWarning(s"Ignore failure", e)
           }
-        }
       }
     }
     promise.future
@@ -231,7 +234,7 @@ private[netty] class NettyRpcEnv(
   }
 
   override def uriOf(systemName: String, address: RpcAddress, endpointName: String): String =
-    new NettyRpcAddress(address.host, address.port, endpointName).toString
+    new RpcEndpointAddress(address.host, address.port, endpointName).toString
 
   override def shutdown(): Unit = {
     cleanup()
@@ -310,9 +313,9 @@ private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
 
   @transient @volatile private var nettyEnv: NettyRpcEnv = _
 
-  @transient @volatile private var _address: NettyRpcAddress = _
+  @transient @volatile private var _address: RpcEndpointAddress = _
 
-  def this(conf: SparkConf, _address: NettyRpcAddress, nettyEnv: NettyRpcEnv) {
+  def this(conf: SparkConf, _address: RpcEndpointAddress, nettyEnv: NettyRpcEnv) {
     this(conf)
     this._address = _address
     this.nettyEnv = nettyEnv
@@ -322,7 +325,7 @@ private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
 
   private def readObject(in: ObjectInputStream): Unit = {
     in.defaultReadObject()
-    _address = in.readObject().asInstanceOf[NettyRpcAddress]
+    _address = in.readObject().asInstanceOf[RpcEndpointAddress]
     nettyEnv = NettyRpcEnv.currentEnv.value
   }
 
@@ -406,49 +409,37 @@ private[netty] class NettyRpcHandler(
   private type RemoteEnvAddress = RpcAddress
 
   // Store all client addresses and their NettyRpcEnv addresses.
+  // TODO: Is this even necessary?
   @GuardedBy("this")
   private val remoteAddresses = new mutable.HashMap[ClientAddress, RemoteEnvAddress]()
 
-  // Store the connections from other NettyRpcEnv addresses. We need to keep track of the connection
-  // count because `TransportClientFactory.createClient` will create multiple connections
-  // (at most `spark.shuffle.io.numConnectionsPerPeer` connections) and randomly select a connection
-  // to send the message. See `TransportClientFactory.createClient` for more details.
-  @GuardedBy("this")
-  private val remoteConnectionCount = new mutable.HashMap[RemoteEnvAddress, Int]()
-
   override def receive(
       client: TransportClient, message: Array[Byte], callback: RpcResponseCallback): Unit = {
     val requestMessage = nettyEnv.deserialize[RequestMessage](message)
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     assert(addr != null)
     val remoteEnvAddress = requestMessage.senderAddress
     val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-    val broadcastMessage: Option[RemoteProcessConnected] =
-      synchronized {
-        // If the first connection to a remote RpcEnv is found, we should broadcast "Associated"
-        if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
-          // clientAddr connects at the first time
-          val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
-          // Increase the connection number of remoteEnvAddress
-          remoteConnectionCount.put(remoteEnvAddress, count + 1)
-          if (count == 0) {
-            // This is the first connection, so fire "Associated"
-            Some(RemoteProcessConnected(remoteEnvAddress))
-          } else {
-            None
-          }
-        } else {
-          None
-        }
+
+    // TODO: Can we add connection callback (channel registered) to the underlying framework?
+    // A variable to track whether we should dispatch the RemoteProcessConnected message.
+    var dispatchRemoteProcessConnected = false
+    synchronized {
+      if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
+        // clientAddr connects at the first time, fire "RemoteProcessConnected"
+        dispatchRemoteProcessConnected = true
       }
-    broadcastMessage.foreach(dispatcher.postToAll)
+    }
+    if (dispatchRemoteProcessConnected) {
+      dispatcher.postToAll(RemoteProcessConnected(remoteEnvAddress))
+    }
     dispatcher.postRemoteMessage(requestMessage, callback)
   }
 
   override def getStreamManager: StreamManager = new OneForOneStreamManager
 
   override def exceptionCaught(cause: Throwable, client: TransportClient): Unit = {
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
       val broadcastMessage =
@@ -469,34 +460,21 @@ private[netty] class NettyRpcHandler(
   }
 
   override def connectionTerminated(client: TransportClient): Unit = {
-    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
+    val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-      val broadcastMessage =
-        synchronized {
-          // If the last connection to a remote RpcEnv is terminated, we should broadcast
-          // "Disassociated"
-          remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
-            remoteAddresses -= clientAddr
-            val count = remoteConnectionCount.getOrElse(remoteEnvAddress, 0)
-            assert(count != 0, "remoteAddresses and remoteConnectionCount are not consistent")
-            if (count - 1 == 0) {
-              // We lost all clients, so clean up and fire "Disassociated"
-              remoteConnectionCount.remove(remoteEnvAddress)
-              Some(RemoteProcessDisconnected(remoteEnvAddress))
-            } else {
-              // Decrease the connection number of remoteEnvAddress
-              remoteConnectionCount.put(remoteEnvAddress, count - 1)
-              None
-            }
-          }
+      val messageOpt: Option[RemoteProcessDisconnected] =
+      synchronized {
+        remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
+          remoteAddresses -= clientAddr
+          Some(RemoteProcessDisconnected(remoteEnvAddress))
         }
-      broadcastMessage.foreach(dispatcher.postToAll)
+      }
+      messageOpt.foreach(dispatcher.postToAll)
     } else {
       // If the channel is closed before connecting, its remoteAddress will be null. In this case,
       // we can ignore it since we don't fire "Associated".
       // See java.net.Socket.getRemoteSocketAddress
     }
   }
-
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
similarity index 65%
rename from core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
rename to core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
index 1876b2559208..87b623693681 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcAddress.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
@@ -17,40 +17,44 @@
 
 package org.apache.spark.rpc.netty
 
-import java.net.URI
-
 import org.apache.spark.SparkException
 import org.apache.spark.rpc.RpcAddress
 
-private[netty] case class NettyRpcAddress(host: String, port: Int, name: String) {
+/**
+ * An address identifier for an RPC endpoint.
+ *
+ * @param host host name of the remote process.
+ * @param port the port the remote RPC environment binds to.
+ * @param name name of the remote endpoint.
+ */
+private[netty] case class RpcEndpointAddress(host: String, port: Int, name: String) {
 
   def toRpcAddress: RpcAddress = RpcAddress(host, port)
 
   override val toString = s"spark://$name@$host:$port"
 }
 
-private[netty] object NettyRpcAddress {
+private[netty] object RpcEndpointAddress {
 
-  def apply(sparkUrl: String): NettyRpcAddress = {
+  def apply(sparkUrl: String): RpcEndpointAddress = {
     try {
-      val uri = new URI(sparkUrl)
+      val uri = new java.net.URI(sparkUrl)
       val host = uri.getHost
       val port = uri.getPort
       val name = uri.getUserInfo
       if (uri.getScheme != "spark" ||
-        host == null ||
-        port < 0 ||
-        name == null ||
-        (uri.getPath != null && !uri.getPath.isEmpty) || // uri.getPath returns "" instead of null
-        uri.getFragment != null ||
-        uri.getQuery != null) {
+          host == null ||
+          port < 0 ||
+          name == null ||
+          (uri.getPath != null && !uri.getPath.isEmpty) || // uri.getPath returns "" instead of null
+          uri.getFragment != null ||
+          uri.getQuery != null) {
         throw new SparkException("Invalid Spark URL: " + sparkUrl)
       }
-      NettyRpcAddress(host, port, name)
+      RpcEndpointAddress(host, port, name)
     } catch {
       case e: java.net.URISyntaxException =>
         throw new SparkException("Invalid Spark URL: " + sparkUrl, e)
     }
   }
-
 }
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointVerifier.scala
similarity index 65%
rename from core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
rename to core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointVerifier.scala
index fa9a3eb99b02..99f20da2d66a 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/IDVerifier.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointVerifier.scala
@@ -14,26 +14,27 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.spark.rpc.netty
 
 import org.apache.spark.rpc.{RpcCallContext, RpcEndpoint, RpcEnv}
 
 /**
- * A message used to ask the remote [[IDVerifier]] if an [[RpcEndpoint]] exists
- */
-private[netty] case class ID(name: String)
-
-/**
- * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if a [[RpcEndpoint]] exists in this [[RpcEnv]]
+ * An [[RpcEndpoint]] for remote [[RpcEnv]]s to query if an [[RpcEndpoint]] exists.
+ *
+ * This is used when setting up a remote endpoint reference.
  */
-private[netty] class IDVerifier(override val rpcEnv: RpcEnv, dispatcher: Dispatcher)
+private[netty] class RpcEndpointVerifier(override val rpcEnv: RpcEnv, dispatcher: Dispatcher)
   extends RpcEndpoint {
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
-    case ID(name) => context.reply(dispatcher.verify(name))
+    case RpcEndpointVerifier.CheckExistence(name) => context.reply(dispatcher.verify(name))
   }
 }
 
-private[netty] object IDVerifier {
-  val NAME = "id-verifier"
+private[netty] object RpcEndpointVerifier {
+  val NAME = "endpoint-verifier"
+
+  /** A message used to ask the remote [[RpcEndpointVerifier]] if an [[RpcEndpoint]] exists. */
+  case class CheckExistence(name: String)
 }
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
index a5d43d3704e3..973a07a0bde3 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
@@ -22,7 +22,7 @@ import org.apache.spark.SparkFunSuite
 class NettyRpcAddressSuite extends SparkFunSuite {
 
   test("toString") {
-    val addr = NettyRpcAddress("localhost", 12345, "test")
+    val addr = RpcEndpointAddress("localhost", 12345, "test")
     assert(addr.toString === "spark://test@localhost:12345")
   }
 
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
index f24f78b8c454..5430e4c0c4d6 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -42,9 +42,6 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
     when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
     nettyRpcHandler.receive(client, null, null)
 
-    when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40001))
-    nettyRpcHandler.receive(client, null, null)
-
     verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 12345)))
   }
 

From 9a430a027faafb083ca569698effb697af26a1db Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 14 Oct 2015 15:08:13 -0700
Subject: [PATCH 239/896] [SPARK-11068] [SQL] [FOLLOW-UP] move execution
 listener to util

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9119 from cloud-fan/callback.
---
 sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala  | 1 +
 .../apache/spark/sql/{ => util}/QueryExecutionListener.scala   | 2 +-
 .../apache/spark/sql/{ => util}/DataFrameCallbackSuite.scala   | 3 ++-
 3 files changed, 4 insertions(+), 2 deletions(-)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => util}/QueryExecutionListener.scala (99%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => util}/DataFrameCallbackSuite.scala (97%)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index a835408f8af3..3d5e35ab315e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -45,6 +45,7 @@ import org.apache.spark.sql.execution.ui.{SQLListener, SQLTab}
 import org.apache.spark.sql.sources.BaseRelation
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.{execution => sparkexecution}
+import org.apache.spark.sql.util.ExecutionListenerManager
 import org.apache.spark.util.Utils
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
similarity index 99%
rename from sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
index 14fbebb45f8b..909a8abd225b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/QueryExecutionListener.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql
+package org.apache.spark.sql.util
 
 import java.util.concurrent.locks.ReentrantReadWriteLock
 import scala.collection.mutable.ListBuffer
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
similarity index 97%
rename from sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
index 4e286a007620..eb056cd51971 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameCallbackSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
@@ -15,9 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql
+package org.apache.spark.sql.util
 
 import org.apache.spark.SparkException
+import org.apache.spark.sql.{functions, QueryTest}
 import org.apache.spark.sql.catalyst.plans.logical.{Aggregate, Project}
 import org.apache.spark.sql.execution.QueryExecution
 import org.apache.spark.sql.test.SharedSQLContext

From 56d7da14ab8f89bf4f303b27f51fd22d23967ffb Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 14 Oct 2015 16:05:37 -0700
Subject: [PATCH 240/896] [SPARK-10104] [SQL] Consolidate different forms of
 table identifiers

Right now, we have QualifiedTableName, TableIdentifier, and Seq[String] to represent table identifiers. We should only have one form and TableIdentifier is the best one because it provides methods to get table name, database name, return unquoted string, and return quoted string.

Author: Wenchen Fan <wenchen@databricks.com>
Author: Wenchen Fan <cloud0fan@163.com>

Closes #8453 from cloud-fan/table-name.
---
 .../apache/spark/sql/catalyst/SqlParser.scala |   2 +-
 .../spark/sql/catalyst/TableIdentifier.scala  |  14 +-
 .../sql/catalyst/analysis/Analyzer.scala      |   4 +-
 .../spark/sql/catalyst/analysis/Catalog.scala | 174 ++++++------------
 .../sql/catalyst/analysis/unresolved.scala    |   6 +-
 .../spark/sql/catalyst/dsl/package.scala      |   3 +-
 .../sql/catalyst/analysis/AnalysisSuite.scala |  24 ++-
 .../sql/catalyst/analysis/AnalysisTest.scala  |  10 +-
 .../analysis/DecimalPrecisionSuite.scala      |   4 +-
 .../apache/spark/sql/DataFrameReader.scala    |   3 +-
 .../apache/spark/sql/DataFrameWriter.scala    |   4 +-
 .../org/apache/spark/sql/SQLContext.scala     |   6 +-
 .../sql/execution/datasources/DDLParser.scala |   2 +-
 .../spark/sql/execution/datasources/ddl.scala |   7 +-
 .../sql/execution/datasources/rules.scala     |   4 +-
 .../apache/spark/sql/CachedTableSuite.scala   |   7 +-
 .../org/apache/spark/sql/JoinSuite.scala      |   5 +-
 .../apache/spark/sql/ListTablesSuite.scala    |   7 +-
 .../parquet/ParquetQuerySuite.scala           |   6 +-
 .../apache/spark/sql/hive/HiveContext.scala   |   2 +-
 .../spark/sql/hive/HiveMetastoreCatalog.scala | 134 ++++----------
 .../org/apache/spark/sql/hive/HiveQl.scala    |  42 ++---
 .../hive/execution/CreateTableAsSelect.scala  |  12 +-
 .../hive/execution/CreateViewAsSelect.scala   |   9 +-
 .../spark/sql/hive/execution/commands.scala   |  10 +-
 .../apache/spark/sql/hive/test/TestHive.scala |   2 +-
 .../hive/JavaMetastoreDataSourcesSuite.java   |   6 +-
 .../spark/sql/hive/ListTablesSuite.scala      |   5 +-
 .../sql/hive/MetastoreDataSourcesSuite.scala  |   9 +-
 .../spark/sql/hive/StatisticsSuite.scala      |   5 +-
 .../sql/hive/execution/SQLQuerySuite.scala    |   6 +-
 .../spark/sql/hive/orc/OrcQuerySuite.scala    |   5 +-
 32 files changed, 212 insertions(+), 327 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index dfab2398857e..2595e1f90c83 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -170,7 +170,7 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     joinedRelation | relationFactor
 
   protected lazy val relationFactor: Parser[LogicalPlan] =
-    ( rep1sep(ident, ".") ~ (opt(AS) ~> opt(ident)) ^^ {
+    ( tableIdentifier ~ (opt(AS) ~> opt(ident)) ^^ {
         case tableIdent ~ alias => UnresolvedRelation(tableIdent, alias)
       }
       | ("(" ~> start <~ ")") ~ (AS.? ~> ident) ^^ { case s ~ a => Subquery(a, s) }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/TableIdentifier.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/TableIdentifier.scala
index d701559bf2d9..4d4e4ded9947 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/TableIdentifier.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/TableIdentifier.scala
@@ -20,14 +20,16 @@ package org.apache.spark.sql.catalyst
 /**
  * Identifies a `table` in `database`.  If `database` is not defined, the current database is used.
  */
-private[sql] case class TableIdentifier(table: String, database: Option[String] = None) {
-  def withDatabase(database: String): TableIdentifier = this.copy(database = Some(database))
-
-  def toSeq: Seq[String] = database.toSeq :+ table
+private[sql] case class TableIdentifier(table: String, database: Option[String]) {
+  def this(table: String) = this(table, None)
 
   override def toString: String = quotedString
 
-  def quotedString: String = toSeq.map("`" + _ + "`").mkString(".")
+  def quotedString: String = database.map(db => s"`$db`.`$table`").getOrElse(s"`$table`")
+
+  def unquotedString: String = database.map(db => s"$db.$table").getOrElse(table)
+}
 
-  def unquotedString: String = toSeq.mkString(".")
+private[sql] object TableIdentifier {
+  def apply(tableName: String): TableIdentifier = new TableIdentifier(tableName)
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 041ab2282739..e6046055bf0f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -105,7 +105,7 @@ class Analyzer(
         // here use the CTE definition first, check table name only and ignore database name
         // see https://github.com/apache/spark/pull/4929#discussion_r27186638 for more info
         case u : UnresolvedRelation =>
-          val substituted = cteRelations.get(u.tableIdentifier.last).map { relation =>
+          val substituted = cteRelations.get(u.tableIdentifier.table).map { relation =>
             val withAlias = u.alias.map(Subquery(_, relation))
             withAlias.getOrElse(relation)
           }
@@ -257,7 +257,7 @@ class Analyzer(
         catalog.lookupRelation(u.tableIdentifier, u.alias)
       } catch {
         case _: NoSuchTableException =>
-          u.failAnalysis(s"no such table ${u.tableName}")
+          u.failAnalysis(s"Table Not Found: ${u.tableName}")
       }
     }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Catalog.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Catalog.scala
index 4cc9a5520a08..8f4ce74a2ea3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Catalog.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Catalog.scala
@@ -42,11 +42,9 @@ trait Catalog {
 
   val conf: CatalystConf
 
-  def tableExists(tableIdentifier: Seq[String]): Boolean
+  def tableExists(tableIdent: TableIdentifier): Boolean
 
-  def lookupRelation(
-      tableIdentifier: Seq[String],
-      alias: Option[String] = None): LogicalPlan
+  def lookupRelation(tableIdent: TableIdentifier, alias: Option[String] = None): LogicalPlan
 
   /**
    * Returns tuples of (tableName, isTemporary) for all tables in the given database.
@@ -56,89 +54,59 @@ trait Catalog {
 
   def refreshTable(tableIdent: TableIdentifier): Unit
 
-  // TODO: Refactor it in the work of SPARK-10104
-  def registerTable(tableIdentifier: Seq[String], plan: LogicalPlan): Unit
+  def registerTable(tableIdent: TableIdentifier, plan: LogicalPlan): Unit
 
-  // TODO: Refactor it in the work of SPARK-10104
-  def unregisterTable(tableIdentifier: Seq[String]): Unit
+  def unregisterTable(tableIdent: TableIdentifier): Unit
 
   def unregisterAllTables(): Unit
 
-  // TODO: Refactor it in the work of SPARK-10104
-  protected def processTableIdentifier(tableIdentifier: Seq[String]): Seq[String] = {
-    if (conf.caseSensitiveAnalysis) {
-      tableIdentifier
-    } else {
-      tableIdentifier.map(_.toLowerCase)
-    }
-  }
-
-  // TODO: Refactor it in the work of SPARK-10104
-  protected def getDbTableName(tableIdent: Seq[String]): String = {
-    val size = tableIdent.size
-    if (size <= 2) {
-      tableIdent.mkString(".")
-    } else {
-      tableIdent.slice(size - 2, size).mkString(".")
-    }
-  }
-
-  // TODO: Refactor it in the work of SPARK-10104
-  protected def getDBTable(tableIdent: Seq[String]) : (Option[String], String) = {
-    (tableIdent.lift(tableIdent.size - 2), tableIdent.last)
-  }
-
   /**
-   * It is not allowed to specifiy database name for tables stored in [[SimpleCatalog]].
-   * We use this method to check it.
+   * Get the table name of TableIdentifier for temporary tables.
    */
-  protected def checkTableIdentifier(tableIdentifier: Seq[String]): Unit = {
-    if (tableIdentifier.length > 1) {
+  protected def getTableName(tableIdent: TableIdentifier): String = {
+    // It is not allowed to specify database name for temporary tables.
+    // We check it here and throw exception if database is defined.
+    if (tableIdent.database.isDefined) {
       throw new AnalysisException("Specifying database name or other qualifiers are not allowed " +
         "for temporary tables. If the table name has dots (.) in it, please quote the " +
         "table name with backticks (`).")
     }
+    if (conf.caseSensitiveAnalysis) {
+      tableIdent.table
+    } else {
+      tableIdent.table.toLowerCase
+    }
   }
 }
 
 class SimpleCatalog(val conf: CatalystConf) extends Catalog {
-  val tables = new ConcurrentHashMap[String, LogicalPlan]
-
-  override def registerTable(
-      tableIdentifier: Seq[String],
-      plan: LogicalPlan): Unit = {
-    checkTableIdentifier(tableIdentifier)
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    tables.put(getDbTableName(tableIdent), plan)
+  private[this] val tables = new ConcurrentHashMap[String, LogicalPlan]
+
+  override def registerTable(tableIdent: TableIdentifier, plan: LogicalPlan): Unit = {
+    tables.put(getTableName(tableIdent), plan)
   }
 
-  override def unregisterTable(tableIdentifier: Seq[String]): Unit = {
-    checkTableIdentifier(tableIdentifier)
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    tables.remove(getDbTableName(tableIdent))
+  override def unregisterTable(tableIdent: TableIdentifier): Unit = {
+    tables.remove(getTableName(tableIdent))
   }
 
   override def unregisterAllTables(): Unit = {
     tables.clear()
   }
 
-  override def tableExists(tableIdentifier: Seq[String]): Boolean = {
-    checkTableIdentifier(tableIdentifier)
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    tables.containsKey(getDbTableName(tableIdent))
+  override def tableExists(tableIdent: TableIdentifier): Boolean = {
+    tables.containsKey(getTableName(tableIdent))
   }
 
   override def lookupRelation(
-      tableIdentifier: Seq[String],
+      tableIdent: TableIdentifier,
       alias: Option[String] = None): LogicalPlan = {
-    checkTableIdentifier(tableIdentifier)
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    val tableFullName = getDbTableName(tableIdent)
-    val table = tables.get(tableFullName)
+    val tableName = getTableName(tableIdent)
+    val table = tables.get(tableName)
     if (table == null) {
-      sys.error(s"Table Not Found: $tableFullName")
+      throw new NoSuchTableException
     }
-    val tableWithQualifiers = Subquery(tableIdent.last, table)
+    val tableWithQualifiers = Subquery(tableName, table)
 
     // If an alias was specified by the lookup, wrap the plan in a subquery so that attributes are
     // properly qualified with this alias.
@@ -146,11 +114,7 @@ class SimpleCatalog(val conf: CatalystConf) extends Catalog {
   }
 
   override def getTables(databaseName: Option[String]): Seq[(String, Boolean)] = {
-    val result = ArrayBuffer.empty[(String, Boolean)]
-    for (name <- tables.keySet().asScala) {
-      result += ((name, true))
-    }
-    result
+    tables.keySet().asScala.map(_ -> true).toSeq
   }
 
   override def refreshTable(tableIdent: TableIdentifier): Unit = {
@@ -165,68 +129,50 @@ class SimpleCatalog(val conf: CatalystConf) extends Catalog {
  * lost when the JVM exits.
  */
 trait OverrideCatalog extends Catalog {
+  private[this] val overrides = new ConcurrentHashMap[String, LogicalPlan]
 
-  // TODO: This doesn't work when the database changes...
-  val overrides = new mutable.HashMap[(Option[String], String), LogicalPlan]()
-
-  abstract override def tableExists(tableIdentifier: Seq[String]): Boolean = {
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    // A temporary tables only has a single part in the tableIdentifier.
-    val overriddenTable = if (tableIdentifier.length > 1) {
-      None: Option[LogicalPlan]
+  private def getOverriddenTable(tableIdent: TableIdentifier): Option[LogicalPlan] = {
+    if (tableIdent.database.isDefined) {
+      None
     } else {
-      overrides.get(getDBTable(tableIdent))
+      Option(overrides.get(getTableName(tableIdent)))
     }
-    overriddenTable match {
+  }
+
+  abstract override def tableExists(tableIdent: TableIdentifier): Boolean = {
+    getOverriddenTable(tableIdent) match {
       case Some(_) => true
-      case None => super.tableExists(tableIdentifier)
+      case None => super.tableExists(tableIdent)
     }
   }
 
   abstract override def lookupRelation(
-      tableIdentifier: Seq[String],
+      tableIdent: TableIdentifier,
       alias: Option[String] = None): LogicalPlan = {
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    // A temporary tables only has a single part in the tableIdentifier.
-    val overriddenTable = if (tableIdentifier.length > 1) {
-      None: Option[LogicalPlan]
-    } else {
-      overrides.get(getDBTable(tableIdent))
-    }
-    val tableWithQualifers = overriddenTable.map(r => Subquery(tableIdent.last, r))
+    getOverriddenTable(tableIdent) match {
+      case Some(table) =>
+        val tableName = getTableName(tableIdent)
+        val tableWithQualifiers = Subquery(tableName, table)
 
-    // If an alias was specified by the lookup, wrap the plan in a subquery so that attributes are
-    // properly qualified with this alias.
-    val withAlias =
-      tableWithQualifers.map(r => alias.map(a => Subquery(a, r)).getOrElse(r))
+        // If an alias was specified by the lookup, wrap the plan in a sub-query so that attributes
+        // are properly qualified with this alias.
+        alias.map(a => Subquery(a, tableWithQualifiers)).getOrElse(tableWithQualifiers)
 
-    withAlias.getOrElse(super.lookupRelation(tableIdentifier, alias))
+      case None => super.lookupRelation(tableIdent, alias)
+    }
   }
 
   abstract override def getTables(databaseName: Option[String]): Seq[(String, Boolean)] = {
-    // We always return all temporary tables.
-    val temporaryTables = overrides.map {
-      case ((_, tableName), _) => (tableName, true)
-    }.toSeq
-
-    temporaryTables ++ super.getTables(databaseName)
+    overrides.keySet().asScala.map(_ -> true).toSeq ++ super.getTables(databaseName)
   }
 
-  override def registerTable(
-      tableIdentifier: Seq[String],
-      plan: LogicalPlan): Unit = {
-    checkTableIdentifier(tableIdentifier)
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    overrides.put(getDBTable(tableIdent), plan)
+  override def registerTable(tableIdent: TableIdentifier, plan: LogicalPlan): Unit = {
+    overrides.put(getTableName(tableIdent), plan)
   }
 
-  override def unregisterTable(tableIdentifier: Seq[String]): Unit = {
-    // A temporary tables only has a single part in the tableIdentifier.
-    // If tableIdentifier has more than one parts, it is not a temporary table
-    // and we do not need to do anything at here.
-    if (tableIdentifier.length == 1) {
-      val tableIdent = processTableIdentifier(tableIdentifier)
-      overrides.remove(getDBTable(tableIdent))
+  override def unregisterTable(tableIdent: TableIdentifier): Unit = {
+    if (tableIdent.database.isEmpty) {
+      overrides.remove(getTableName(tableIdent))
     }
   }
 
@@ -243,12 +189,12 @@ object EmptyCatalog extends Catalog {
 
   override val conf: CatalystConf = EmptyConf
 
-  override def tableExists(tableIdentifier: Seq[String]): Boolean = {
+  override def tableExists(tableIdent: TableIdentifier): Boolean = {
     throw new UnsupportedOperationException
   }
 
   override def lookupRelation(
-      tableIdentifier: Seq[String],
+      tableIdent: TableIdentifier,
       alias: Option[String] = None): LogicalPlan = {
     throw new UnsupportedOperationException
   }
@@ -257,15 +203,17 @@ object EmptyCatalog extends Catalog {
     throw new UnsupportedOperationException
   }
 
-  override def registerTable(tableIdentifier: Seq[String], plan: LogicalPlan): Unit = {
+  override def registerTable(tableIdent: TableIdentifier, plan: LogicalPlan): Unit = {
     throw new UnsupportedOperationException
   }
 
-  override def unregisterTable(tableIdentifier: Seq[String]): Unit = {
+  override def unregisterTable(tableIdent: TableIdentifier): Unit = {
     throw new UnsupportedOperationException
   }
 
-  override def unregisterAllTables(): Unit = {}
+  override def unregisterAllTables(): Unit = {
+    throw new UnsupportedOperationException
+  }
 
   override def refreshTable(tableIdent: TableIdentifier): Unit = {
     throw new UnsupportedOperationException
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
index 43ee3191935e..c97365003935 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.catalyst.analysis
 
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
-import org.apache.spark.sql.catalyst.errors
+import org.apache.spark.sql.catalyst.{TableIdentifier, errors}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.LeafNode
 import org.apache.spark.sql.catalyst.trees.TreeNode
@@ -36,11 +36,11 @@ class UnresolvedException[TreeType <: TreeNode[_]](tree: TreeType, function: Str
  * Holds the name of a relation that has yet to be looked up in a [[Catalog]].
  */
 case class UnresolvedRelation(
-    tableIdentifier: Seq[String],
+    tableIdentifier: TableIdentifier,
     alias: Option[String] = None) extends LeafNode {
 
   /** Returns a `.` separated name for this relation. */
-  def tableName: String = tableIdentifier.mkString(".")
+  def tableName: String = tableIdentifier.unquotedString
 
   override def output: Seq[Attribute] = Nil
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
index 699c4cc63d09..27b3cd84b384 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
@@ -286,7 +286,8 @@ package object dsl {
 
       def insertInto(tableName: String, overwrite: Boolean = false): LogicalPlan =
         InsertIntoTable(
-          analysis.UnresolvedRelation(Seq(tableName)), Map.empty, logicalPlan, overwrite, false)
+          analysis.UnresolvedRelation(TableIdentifier(tableName)),
+          Map.empty, logicalPlan, overwrite, false)
 
       def analyze: LogicalPlan = EliminateSubQueries(analysis.SimpleAnalyzer.execute(logicalPlan))
     }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 820b336aac75..ec05cfa63c5b 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.catalyst.analysis
 
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.dsl.plans._
 import org.apache.spark.sql.catalyst.expressions._
@@ -53,32 +54,39 @@ class AnalysisSuite extends AnalysisTest {
       Project(testRelation.output, testRelation))
 
     checkAnalysis(
-      Project(Seq(UnresolvedAttribute("TbL.a")), UnresolvedRelation(Seq("TaBlE"), Some("TbL"))),
+      Project(Seq(UnresolvedAttribute("TbL.a")),
+        UnresolvedRelation(TableIdentifier("TaBlE"), Some("TbL"))),
       Project(testRelation.output, testRelation))
 
     assertAnalysisError(
-      Project(Seq(UnresolvedAttribute("tBl.a")), UnresolvedRelation(Seq("TaBlE"), Some("TbL"))),
+      Project(Seq(UnresolvedAttribute("tBl.a")), UnresolvedRelation(
+        TableIdentifier("TaBlE"), Some("TbL"))),
       Seq("cannot resolve"))
 
     checkAnalysis(
-      Project(Seq(UnresolvedAttribute("TbL.a")), UnresolvedRelation(Seq("TaBlE"), Some("TbL"))),
+      Project(Seq(UnresolvedAttribute("TbL.a")), UnresolvedRelation(
+        TableIdentifier("TaBlE"), Some("TbL"))),
       Project(testRelation.output, testRelation),
       caseSensitive = false)
 
     checkAnalysis(
-      Project(Seq(UnresolvedAttribute("tBl.a")), UnresolvedRelation(Seq("TaBlE"), Some("TbL"))),
+      Project(Seq(UnresolvedAttribute("tBl.a")), UnresolvedRelation(
+        TableIdentifier("TaBlE"), Some("TbL"))),
       Project(testRelation.output, testRelation),
       caseSensitive = false)
   }
 
   test("resolve relations") {
-    assertAnalysisError(UnresolvedRelation(Seq("tAbLe"), None), Seq("Table Not Found: tAbLe"))
+    assertAnalysisError(
+      UnresolvedRelation(TableIdentifier("tAbLe"), None), Seq("Table Not Found: tAbLe"))
 
-    checkAnalysis(UnresolvedRelation(Seq("TaBlE"), None), testRelation)
+    checkAnalysis(UnresolvedRelation(TableIdentifier("TaBlE"), None), testRelation)
 
-    checkAnalysis(UnresolvedRelation(Seq("tAbLe"), None), testRelation, caseSensitive = false)
+    checkAnalysis(
+      UnresolvedRelation(TableIdentifier("tAbLe"), None), testRelation, caseSensitive = false)
 
-    checkAnalysis(UnresolvedRelation(Seq("TaBlE"), None), testRelation, caseSensitive = false)
+    checkAnalysis(
+      UnresolvedRelation(TableIdentifier("TaBlE"), None), testRelation, caseSensitive = false)
   }
 
   test("divide should be casted into fractional types") {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisTest.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisTest.scala
index 53b3695a86be..23861ed15da6 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisTest.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisTest.scala
@@ -17,9 +17,10 @@
 
 package org.apache.spark.sql.catalyst.analysis
 
+import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.plans.PlanTest
 import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.catalyst.SimpleCatalystConf
+import org.apache.spark.sql.catalyst.{TableIdentifier, SimpleCatalystConf}
 
 trait AnalysisTest extends PlanTest {
 
@@ -30,8 +31,8 @@ trait AnalysisTest extends PlanTest {
     val caseSensitiveCatalog = new SimpleCatalog(caseSensitiveConf)
     val caseInsensitiveCatalog = new SimpleCatalog(caseInsensitiveConf)
 
-    caseSensitiveCatalog.registerTable(Seq("TaBlE"), TestRelations.testRelation)
-    caseInsensitiveCatalog.registerTable(Seq("TaBlE"), TestRelations.testRelation)
+    caseSensitiveCatalog.registerTable(TableIdentifier("TaBlE"), TestRelations.testRelation)
+    caseInsensitiveCatalog.registerTable(TableIdentifier("TaBlE"), TestRelations.testRelation)
 
     new Analyzer(caseSensitiveCatalog, EmptyFunctionRegistry, caseSensitiveConf) {
       override val extendedResolutionRules = EliminateSubQueries :: Nil
@@ -67,8 +68,7 @@ trait AnalysisTest extends PlanTest {
       expectedErrors: Seq[String],
       caseSensitive: Boolean = true): Unit = {
     val analyzer = getAnalyzer(caseSensitive)
-    // todo: make sure we throw AnalysisException during analysis
-    val e = intercept[Exception] {
+    val e = intercept[AnalysisException] {
       analyzer.checkAnalysis(analyzer.execute(inputPlan))
     }
     assert(expectedErrors.map(_.toLowerCase).forall(e.getMessage.toLowerCase.contains),
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
index b4ad618c23e3..40c4ae792091 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
@@ -23,7 +23,7 @@ import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{Union, Project, LocalRelation}
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.catalyst.SimpleCatalystConf
+import org.apache.spark.sql.catalyst.{TableIdentifier, SimpleCatalystConf}
 
 class DecimalPrecisionSuite extends SparkFunSuite with BeforeAndAfter {
   val conf = new SimpleCatalystConf(true)
@@ -47,7 +47,7 @@ class DecimalPrecisionSuite extends SparkFunSuite with BeforeAndAfter {
   val b: Expression = UnresolvedAttribute("b")
 
   before {
-    catalog.registerTable(Seq("table"), relation)
+    catalog.registerTable(TableIdentifier("table"), relation)
   }
 
   private def checkType(expression: Expression, expectedType: DataType): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index 97a8b6518a83..eacdea2c1e5b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -33,6 +33,7 @@ import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.types.StructType
 import org.apache.spark.{Logging, Partition}
+import org.apache.spark.sql.catalyst.{SqlParser, TableIdentifier}
 
 /**
  * :: Experimental ::
@@ -287,7 +288,7 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    * @since 1.4.0
    */
   def table(tableName: String): DataFrame = {
-    DataFrame(sqlContext, sqlContext.catalog.lookupRelation(Seq(tableName)))
+    DataFrame(sqlContext, sqlContext.catalog.lookupRelation(TableIdentifier(tableName)))
   }
 
   ///////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
index 03e973666e88..764510ab4b4b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
@@ -171,7 +171,7 @@ final class DataFrameWriter private[sql](df: DataFrame) {
     val overwrite = mode == SaveMode.Overwrite
     df.sqlContext.executePlan(
       InsertIntoTable(
-        UnresolvedRelation(tableIdent.toSeq),
+        UnresolvedRelation(tableIdent),
         partitions.getOrElse(Map.empty[String, Option[String]]),
         df.logicalPlan,
         overwrite,
@@ -201,7 +201,7 @@ final class DataFrameWriter private[sql](df: DataFrame) {
   }
 
   private def saveAsTable(tableIdent: TableIdentifier): Unit = {
-    val tableExists = df.sqlContext.catalog.tableExists(tableIdent.toSeq)
+    val tableExists = df.sqlContext.catalog.tableExists(tableIdent)
 
     (tableExists, mode) match {
       case (true, SaveMode.Ignore) =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 3d5e35ab315e..361eb576c567 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -714,7 +714,7 @@ class SQLContext private[sql](
    * only during the lifetime of this instance of SQLContext.
    */
   private[sql] def registerDataFrameAsTable(df: DataFrame, tableName: String): Unit = {
-    catalog.registerTable(Seq(tableName), df.logicalPlan)
+    catalog.registerTable(TableIdentifier(tableName), df.logicalPlan)
   }
 
   /**
@@ -728,7 +728,7 @@ class SQLContext private[sql](
    */
   def dropTempTable(tableName: String): Unit = {
     cacheManager.tryUncacheQuery(table(tableName))
-    catalog.unregisterTable(Seq(tableName))
+    catalog.unregisterTable(TableIdentifier(tableName))
   }
 
   /**
@@ -795,7 +795,7 @@ class SQLContext private[sql](
   }
 
   private def table(tableIdent: TableIdentifier): DataFrame = {
-    DataFrame(this, catalog.lookupRelation(tableIdent.toSeq))
+    DataFrame(this, catalog.lookupRelation(tableIdent))
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
index f7a88b98c0b4..446739d5b8a2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
@@ -140,7 +140,7 @@ class DDLParser(parseQuery: String => LogicalPlan)
   protected lazy val describeTable: Parser[LogicalPlan] =
     (DESCRIBE ~> opt(EXTENDED)) ~ tableIdentifier ^^ {
       case e ~ tableIdent =>
-        DescribeCommand(UnresolvedRelation(tableIdent.toSeq, None), e.isDefined)
+        DescribeCommand(UnresolvedRelation(tableIdent, None), e.isDefined)
     }
 
   protected lazy val refreshTable: Parser[LogicalPlan] =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala
index 31d6b75e1347..e7deeff13dc4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ddl.scala
@@ -71,7 +71,6 @@ case class CreateTableUsing(
  * can analyze the logical plan that will be used to populate the table.
  * So, [[PreWriteCheck]] can detect cases that are not allowed.
  */
-// TODO: Use TableIdentifier instead of String for tableName (SPARK-10104).
 case class CreateTableUsingAsSelect(
     tableIdent: TableIdentifier,
     provider: String,
@@ -93,7 +92,7 @@ case class CreateTempTableUsing(
     val resolved = ResolvedDataSource(
       sqlContext, userSpecifiedSchema, Array.empty[String], provider, options)
     sqlContext.catalog.registerTable(
-      tableIdent.toSeq,
+      tableIdent,
       DataFrame(sqlContext, LogicalRelation(resolved.relation)).logicalPlan)
 
     Seq.empty[Row]
@@ -112,7 +111,7 @@ case class CreateTempTableUsingAsSelect(
     val df = DataFrame(sqlContext, query)
     val resolved = ResolvedDataSource(sqlContext, provider, partitionColumns, mode, options, df)
     sqlContext.catalog.registerTable(
-      tableIdent.toSeq,
+      tableIdent,
       DataFrame(sqlContext, LogicalRelation(resolved.relation)).logicalPlan)
 
     Seq.empty[Row]
@@ -128,7 +127,7 @@ case class RefreshTable(tableIdent: TableIdentifier)
 
     // If this table is cached as a InMemoryColumnarRelation, drop the original
     // cached version and make the new version cached lazily.
-    val logicalPlan = sqlContext.catalog.lookupRelation(tableIdent.toSeq)
+    val logicalPlan = sqlContext.catalog.lookupRelation(tableIdent)
     // Use lookupCachedData directly since RefreshTable also takes databaseName.
     val isCached = sqlContext.cacheManager.lookupCachedData(logicalPlan).nonEmpty
     if (isCached) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
index 8efc8016f94d..b00e5680fef9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
@@ -143,9 +143,9 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
       case CreateTableUsingAsSelect(tableIdent, _, _, partitionColumns, mode, _, query) =>
         // When the SaveMode is Overwrite, we need to check if the table is an input table of
         // the query. If so, we will throw an AnalysisException to let users know it is not allowed.
-        if (mode == SaveMode.Overwrite && catalog.tableExists(tableIdent.toSeq)) {
+        if (mode == SaveMode.Overwrite && catalog.tableExists(tableIdent)) {
           // Need to remove SubQuery operator.
-          EliminateSubQueries(catalog.lookupRelation(tableIdent.toSeq)) match {
+          EliminateSubQueries(catalog.lookupRelation(tableIdent)) match {
             // Only do the check if the table is a data source table
             // (the relation is a BaseRelation).
             case l @ LogicalRelation(dest: BaseRelation, _) =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
index 356d4ff3fa83..fd566c8276bc 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.sql.catalyst.analysis.NoSuchTableException
 import org.apache.spark.sql.execution.PhysicalRDD
 
 import scala.concurrent.duration._
@@ -287,8 +288,7 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
     testData.select('key).registerTempTable("t1")
     sqlContext.table("t1")
     sqlContext.dropTempTable("t1")
-    assert(
-      intercept[RuntimeException](sqlContext.table("t1")).getMessage.startsWith("Table Not Found"))
+    intercept[NoSuchTableException](sqlContext.table("t1"))
   }
 
   test("Drops cached temporary table") {
@@ -300,8 +300,7 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
     assert(sqlContext.isCached("t2"))
 
     sqlContext.dropTempTable("t1")
-    assert(
-      intercept[RuntimeException](sqlContext.table("t1")).getMessage.startsWith("Table Not Found"))
+    intercept[NoSuchTableException](sqlContext.table("t1"))
     assert(!sqlContext.isCached("t2"))
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
index 7a027e13089e..b1fb06815868 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql
 
 import org.apache.spark.sql.catalyst.analysis.UnresolvedRelation
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.execution.joins._
 import org.apache.spark.sql.test.SharedSQLContext
 
@@ -359,8 +360,8 @@ class JoinSuite extends QueryTest with SharedSQLContext {
     upperCaseData.where('N <= 4).registerTempTable("left")
     upperCaseData.where('N >= 3).registerTempTable("right")
 
-    val left = UnresolvedRelation(Seq("left"), None)
-    val right = UnresolvedRelation(Seq("right"), None)
+    val left = UnresolvedRelation(TableIdentifier("left"), None)
+    val right = UnresolvedRelation(TableIdentifier("right"), None)
 
     checkAnswer(
       left.join(right, $"left.N" === $"right.N", "full"),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ListTablesSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ListTablesSuite.scala
index eab0fbb196eb..5688f46e5e3d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ListTablesSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ListTablesSuite.scala
@@ -21,6 +21,7 @@ import org.scalatest.BeforeAndAfter
 
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types.{BooleanType, StringType, StructField, StructType}
+import org.apache.spark.sql.catalyst.TableIdentifier
 
 class ListTablesSuite extends QueryTest with BeforeAndAfter with SharedSQLContext {
   import testImplicits._
@@ -32,7 +33,7 @@ class ListTablesSuite extends QueryTest with BeforeAndAfter with SharedSQLContex
   }
 
   after {
-    sqlContext.catalog.unregisterTable(Seq("ListTablesSuiteTable"))
+    sqlContext.catalog.unregisterTable(TableIdentifier("ListTablesSuiteTable"))
   }
 
   test("get all tables") {
@@ -44,7 +45,7 @@ class ListTablesSuite extends QueryTest with BeforeAndAfter with SharedSQLContex
       sql("SHOW tables").filter("tableName = 'ListTablesSuiteTable'"),
       Row("ListTablesSuiteTable", true))
 
-    sqlContext.catalog.unregisterTable(Seq("ListTablesSuiteTable"))
+    sqlContext.catalog.unregisterTable(TableIdentifier("ListTablesSuiteTable"))
     assert(sqlContext.tables().filter("tableName = 'ListTablesSuiteTable'").count() === 0)
   }
 
@@ -57,7 +58,7 @@ class ListTablesSuite extends QueryTest with BeforeAndAfter with SharedSQLContex
       sql("show TABLES in DB").filter("tableName = 'ListTablesSuiteTable'"),
       Row("ListTablesSuiteTable", true))
 
-    sqlContext.catalog.unregisterTable(Seq("ListTablesSuiteTable"))
+    sqlContext.catalog.unregisterTable(TableIdentifier("ListTablesSuiteTable"))
     assert(sqlContext.tables().filter("tableName = 'ListTablesSuiteTable'").count() === 0)
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
index cc02ef81c9f8..baff7f5752a7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
@@ -22,7 +22,7 @@ import java.io.File
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.sql._
-import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.{TableIdentifier, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.SpecificMutableRow
 import org.apache.spark.sql.execution.datasources.parquet.TestingUDT.{NestedStruct, NestedStructUDT}
 import org.apache.spark.sql.test.SharedSQLContext
@@ -49,7 +49,7 @@ class ParquetQuerySuite extends QueryTest with ParquetTest with SharedSQLContext
       sql("INSERT INTO TABLE t SELECT * FROM tmp")
       checkAnswer(sqlContext.table("t"), (data ++ data).map(Row.fromTuple))
     }
-    sqlContext.catalog.unregisterTable(Seq("tmp"))
+    sqlContext.catalog.unregisterTable(TableIdentifier("tmp"))
   }
 
   test("overwriting") {
@@ -59,7 +59,7 @@ class ParquetQuerySuite extends QueryTest with ParquetTest with SharedSQLContext
       sql("INSERT OVERWRITE TABLE t SELECT * FROM tmp")
       checkAnswer(sqlContext.table("t"), data.map(Row.fromTuple))
     }
-    sqlContext.catalog.unregisterTable(Seq("tmp"))
+    sqlContext.catalog.unregisterTable(TableIdentifier("tmp"))
   }
 
   test("self-join") {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index e620d7fb82af..4d8a3f728e6b 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -358,7 +358,7 @@ class HiveContext private[hive](
   @Experimental
   def analyze(tableName: String) {
     val tableIdent = SqlParser.parseTableIdentifier(tableName)
-    val relation = EliminateSubQueries(catalog.lookupRelation(tableIdent.toSeq))
+    val relation = EliminateSubQueries(catalog.lookupRelation(tableIdent))
 
     relation match {
       case relation: MetastoreRelation =>
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index 1f8223e1ff50..5819cb9d0877 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -36,7 +36,7 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules._
-import org.apache.spark.sql.catalyst.{InternalRow, SqlParser, TableIdentifier}
+import org.apache.spark.sql.catalyst.{InternalRow, TableIdentifier}
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation, Partition => ParquetPartition, PartitionSpec, ResolvedDataSource}
 import org.apache.spark.sql.execution.{FileRelation, datasources}
@@ -103,10 +103,19 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
   /** Usages should lock on `this`. */
   protected[hive] lazy val hiveWarehouse = new Warehouse(hive.hiveconf)
 
-  // TODO: Use this everywhere instead of tuples or databaseName, tableName,.
   /** A fully qualified identifier for a table (i.e., database.tableName) */
-  case class QualifiedTableName(database: String, name: String) {
-    def toLowerCase: QualifiedTableName = QualifiedTableName(database.toLowerCase, name.toLowerCase)
+  case class QualifiedTableName(database: String, name: String)
+
+  private def getQualifiedTableName(tableIdent: TableIdentifier) = {
+    QualifiedTableName(
+      tableIdent.database.getOrElse(client.currentDatabase).toLowerCase,
+      tableIdent.table.toLowerCase)
+  }
+
+  private def getQualifiedTableName(hiveTable: HiveTable) = {
+    QualifiedTableName(
+      hiveTable.specifiedDatabase.getOrElse(client.currentDatabase).toLowerCase,
+      hiveTable.name.toLowerCase)
   }
 
   /** A cache of Spark SQL data source tables that have been accessed. */
@@ -179,33 +188,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
   }
 
   def invalidateTable(tableIdent: TableIdentifier): Unit = {
-    val databaseName = tableIdent.database.getOrElse(client.currentDatabase)
-    val tableName = tableIdent.table
-
-    cachedDataSourceTables.invalidate(QualifiedTableName(databaseName, tableName).toLowerCase)
-  }
-
-  val caseSensitive: Boolean = false
-
-  /**
-   * Creates a data source table (a table created with USING clause) in Hive's metastore.
-   * Returns true when the table has been created. Otherwise, false.
-   */
-  // TODO: Remove this in SPARK-10104.
-  def createDataSourceTable(
-      tableName: String,
-      userSpecifiedSchema: Option[StructType],
-      partitionColumns: Array[String],
-      provider: String,
-      options: Map[String, String],
-      isExternal: Boolean): Unit = {
-    createDataSourceTable(
-      SqlParser.parseTableIdentifier(tableName),
-      userSpecifiedSchema,
-      partitionColumns,
-      provider,
-      options,
-      isExternal)
+    cachedDataSourceTables.invalidate(getQualifiedTableName(tableIdent))
   }
 
   def createDataSourceTable(
@@ -215,10 +198,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       provider: String,
       options: Map[String, String],
       isExternal: Boolean): Unit = {
-    val (dbName, tblName) = {
-      val database = tableIdent.database.getOrElse(client.currentDatabase)
-      processDatabaseAndTableName(database, tableIdent.table)
-    }
+    val QualifiedTableName(dbName, tblName) = getQualifiedTableName(tableIdent)
 
     val tableProperties = new mutable.HashMap[String, String]
     tableProperties.put("spark.sql.sources.provider", provider)
@@ -311,7 +291,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
 
     // TODO: Support persisting partitioned data source relations in Hive compatible format
     val qualifiedTableName = tableIdent.quotedString
-    val (hiveCompitiableTable, logMessage) = (maybeSerDe, dataSource.relation) match {
+    val (hiveCompatibleTable, logMessage) = (maybeSerDe, dataSource.relation) match {
       case (Some(serde), relation: HadoopFsRelation)
         if relation.paths.length == 1 && relation.partitionColumns.isEmpty =>
         val hiveTable = newHiveCompatibleMetastoreTable(relation, serde)
@@ -349,9 +329,9 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         (None, message)
     }
 
-    (hiveCompitiableTable, logMessage) match {
+    (hiveCompatibleTable, logMessage) match {
       case (Some(table), message) =>
-        // We first try to save the metadata of the table in a Hive compatiable way.
+        // We first try to save the metadata of the table in a Hive compatible way.
         // If Hive throws an error, we fall back to save its metadata in the Spark SQL
         // specific way.
         try {
@@ -374,48 +354,29 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
     }
   }
 
-  def hiveDefaultTableFilePath(tableName: String): String = {
-    hiveDefaultTableFilePath(SqlParser.parseTableIdentifier(tableName))
-  }
-
   def hiveDefaultTableFilePath(tableIdent: TableIdentifier): String = {
     // Code based on: hiveWarehouse.getTablePath(currentDatabase, tableName)
-    val database = tableIdent.database.getOrElse(client.currentDatabase)
-
-    new Path(
-      new Path(client.getDatabase(database).location),
-      tableIdent.table.toLowerCase).toString
+    val QualifiedTableName(dbName, tblName) = getQualifiedTableName(tableIdent)
+    new Path(new Path(client.getDatabase(dbName).location), tblName).toString
   }
 
-  def tableExists(tableIdentifier: Seq[String]): Boolean = {
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    val databaseName =
-      tableIdent
-        .lift(tableIdent.size - 2)
-        .getOrElse(client.currentDatabase)
-    val tblName = tableIdent.last
-    client.getTableOption(databaseName, tblName).isDefined
+  override def tableExists(tableIdent: TableIdentifier): Boolean = {
+    val QualifiedTableName(dbName, tblName) = getQualifiedTableName(tableIdent)
+    client.getTableOption(dbName, tblName).isDefined
   }
 
-  def lookupRelation(
-      tableIdentifier: Seq[String],
+  override def lookupRelation(
+      tableIdent: TableIdentifier,
       alias: Option[String]): LogicalPlan = {
-    val tableIdent = processTableIdentifier(tableIdentifier)
-    val databaseName = tableIdent.lift(tableIdent.size - 2).getOrElse(
-      client.currentDatabase)
-    val tblName = tableIdent.last
-    val table = client.getTable(databaseName, tblName)
+    val qualifiedTableName = getQualifiedTableName(tableIdent)
+    val table = client.getTable(qualifiedTableName.database, qualifiedTableName.name)
 
     if (table.properties.get("spark.sql.sources.provider").isDefined) {
-      val dataSourceTable =
-        cachedDataSourceTables(QualifiedTableName(databaseName, tblName).toLowerCase)
+      val dataSourceTable = cachedDataSourceTables(qualifiedTableName)
+      val tableWithQualifiers = Subquery(qualifiedTableName.name, dataSourceTable)
       // Then, if alias is specified, wrap the table with a Subquery using the alias.
       // Otherwise, wrap the table with a Subquery using the table name.
-      val withAlias =
-        alias.map(a => Subquery(a, dataSourceTable)).getOrElse(
-          Subquery(tableIdent.last, dataSourceTable))
-
-      withAlias
+      alias.map(a => Subquery(a, tableWithQualifiers)).getOrElse(tableWithQualifiers)
     } else if (table.tableType == VirtualView) {
       val viewText = table.viewText.getOrElse(sys.error("Invalid view without text."))
       alias match {
@@ -425,7 +386,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         case Some(aliasText) => Subquery(aliasText, HiveQl.createPlan(viewText))
       }
     } else {
-      MetastoreRelation(databaseName, tblName, alias)(table)(hive)
+      MetastoreRelation(qualifiedTableName.database, qualifiedTableName.name, alias)(table)(hive)
     }
   }
 
@@ -524,26 +485,6 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
     client.listTables(db).map(tableName => (tableName, false))
   }
 
-  protected def processDatabaseAndTableName(
-      databaseName: Option[String],
-      tableName: String): (Option[String], String) = {
-    if (!caseSensitive) {
-      (databaseName.map(_.toLowerCase), tableName.toLowerCase)
-    } else {
-      (databaseName, tableName)
-    }
-  }
-
-  protected def processDatabaseAndTableName(
-      databaseName: String,
-      tableName: String): (String, String) = {
-    if (!caseSensitive) {
-      (databaseName.toLowerCase, tableName.toLowerCase)
-    } else {
-      (databaseName, tableName)
-    }
-  }
-
   /**
    * When scanning or writing to non-partitioned Metastore Parquet tables, convert them to Parquet
    * data source relations for better performance.
@@ -597,8 +538,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
               "It is not allowed to define a view with both IF NOT EXISTS and OR REPLACE.")
           }
 
-          val (dbName, tblName) = processDatabaseAndTableName(
-            table.specifiedDatabase.getOrElse(client.currentDatabase), table.name)
+          val QualifiedTableName(dbName, tblName) = getQualifiedTableName(table)
 
           execution.CreateViewAsSelect(
             table.copy(
@@ -636,7 +576,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
           val mode = if (allowExisting) SaveMode.Ignore else SaveMode.ErrorIfExists
           CreateTableUsingAsSelect(
             TableIdentifier(desc.name),
-            hive.conf.defaultDataSourceName,
+            conf.defaultDataSourceName,
             temporary = false,
             Array.empty[String],
             mode,
@@ -652,9 +592,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
             table
           }
 
-          val (dbName, tblName) =
-            processDatabaseAndTableName(
-              desc.specifiedDatabase.getOrElse(client.currentDatabase), desc.name)
+          val QualifiedTableName(dbName, tblName) = getQualifiedTableName(table)
 
           execution.CreateTableAsSelect(
             desc.copy(
@@ -712,7 +650,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
    * UNIMPLEMENTED: It needs to be decided how we will persist in-memory tables to the metastore.
    * For now, if this functionality is desired mix in the in-memory [[OverrideCatalog]].
    */
-  override def registerTable(tableIdentifier: Seq[String], plan: LogicalPlan): Unit = {
+  override def registerTable(tableIdent: TableIdentifier, plan: LogicalPlan): Unit = {
     throw new UnsupportedOperationException
   }
 
@@ -720,7 +658,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
    * UNIMPLEMENTED: It needs to be decided how we will persist in-memory tables to the metastore.
    * For now, if this functionality is desired mix in the in-memory [[OverrideCatalog]].
    */
-  override def unregisterTable(tableIdentifier: Seq[String]): Unit = {
+  override def unregisterTable(tableIdent: TableIdentifier): Unit = {
     throw new UnsupportedOperationException
   }
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 1d505019400b..d4ff5cc0f12a 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -41,6 +41,7 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.{logical, _}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.trees.CurrentOrigin
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.execution.ExplainCommand
 import org.apache.spark.sql.execution.datasources.DescribeCommand
 import org.apache.spark.sql.hive.HiveShim._
@@ -442,24 +443,12 @@ private[hive] object HiveQl extends Logging {
       throw new NotImplementedError(s"No parse rules for StructField:\n ${dumpTree(a).toString} ")
   }
 
-  protected def extractDbNameTableName(tableNameParts: Node): (Option[String], String) = {
-    val (db, tableName) =
-      tableNameParts.getChildren.asScala.map {
-        case Token(part, Nil) => cleanIdentifier(part)
-      } match {
-        case Seq(tableOnly) => (None, tableOnly)
-        case Seq(databaseName, table) => (Some(databaseName), table)
-      }
-
-    (db, tableName)
-  }
-
-  protected def extractTableIdent(tableNameParts: Node): Seq[String] = {
+  protected def extractTableIdent(tableNameParts: Node): TableIdentifier = {
     tableNameParts.getChildren.asScala.map {
       case Token(part, Nil) => cleanIdentifier(part)
     } match {
-      case Seq(tableOnly) => Seq(tableOnly)
-      case Seq(databaseName, table) => Seq(databaseName, table)
+      case Seq(tableOnly) => TableIdentifier(tableOnly)
+      case Seq(databaseName, table) => TableIdentifier(table, Some(databaseName))
       case other => sys.error("Hive only supports tables names like 'tableName' " +
         s"or 'databaseName.tableName', found '$other'")
     }
@@ -518,13 +507,13 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       properties: Map[String, String],
       allowExist: Boolean,
       replace: Boolean): CreateViewAsSelect = {
-    val (db, viewName) = extractDbNameTableName(viewNameParts)
+    val TableIdentifier(viewName, dbName) = extractTableIdent(viewNameParts)
 
     val originalText = context.getTokenRewriteStream
       .toString(query.getTokenStartIndex, query.getTokenStopIndex)
 
     val tableDesc = HiveTable(
-      specifiedDatabase = db,
+      specifiedDatabase = dbName,
       name = viewName,
       schema = schema,
       partitionColumns = Seq.empty[HiveColumn],
@@ -611,7 +600,8 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
               case tableName =>
                 // It is describing a table with the format like "describe table".
                 DescribeCommand(
-                  UnresolvedRelation(Seq(tableName.getText), None), isExtended = extended.isDefined)
+                  UnresolvedRelation(TableIdentifier(tableName.getText), None),
+                  isExtended = extended.isDefined)
             }
           }
           // All other cases.
@@ -716,12 +706,12 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
             "TOK_TABLELOCATION",
             "TOK_TABLEPROPERTIES"),
           children)
-      val (db, tableName) = extractDbNameTableName(tableNameParts)
+      val TableIdentifier(tblName, dbName) = extractTableIdent(tableNameParts)
 
       // TODO add bucket support
       var tableDesc: HiveTable = HiveTable(
-        specifiedDatabase = db,
-        name = tableName,
+        specifiedDatabase = dbName,
+        name = tblName,
         schema = Seq.empty[HiveColumn],
         partitionColumns = Seq.empty[HiveColumn],
         properties = Map[String, String](),
@@ -1264,15 +1254,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
           nonAliasClauses)
       }
 
-      val tableIdent =
-        tableNameParts.getChildren.asScala.map {
-          case Token(part, Nil) => cleanIdentifier(part)
-        } match {
-          case Seq(tableOnly) => Seq(tableOnly)
-          case Seq(databaseName, table) => Seq(databaseName, table)
-          case other => sys.error("Hive only supports tables names like 'tableName' " +
-            s"or 'databaseName.tableName', found '$other'")
-      }
+      val tableIdent = extractTableIdent(tableNameParts)
       val alias = aliasClause.map { case Token(a, Nil) => cleanIdentifier(a) }
       val relation = UnresolvedRelation(tableIdent, alias)
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateTableAsSelect.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateTableAsSelect.scala
index 8422287e177e..e72a60b42e65 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateTableAsSelect.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateTableAsSelect.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.hive.execution
 
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.catalyst.plans.logical.{InsertIntoTable, LogicalPlan}
 import org.apache.spark.sql.execution.RunnableCommand
 import org.apache.spark.sql.hive.client.{HiveColumn, HiveTable}
@@ -37,8 +38,7 @@ case class CreateTableAsSelect(
     allowExisting: Boolean)
   extends RunnableCommand {
 
-  def database: String = tableDesc.database
-  def tableName: String = tableDesc.name
+  val tableIdentifier = TableIdentifier(tableDesc.name, Some(tableDesc.database))
 
   override def children: Seq[LogicalPlan] = Seq(query)
 
@@ -72,18 +72,18 @@ case class CreateTableAsSelect(
       hiveContext.catalog.client.createTable(withSchema)
 
       // Get the Metastore Relation
-      hiveContext.catalog.lookupRelation(Seq(database, tableName), None) match {
+      hiveContext.catalog.lookupRelation(tableIdentifier, None) match {
         case r: MetastoreRelation => r
       }
     }
     // TODO ideally, we should get the output data ready first and then
     // add the relation into catalog, just in case of failure occurs while data
     // processing.
-    if (hiveContext.catalog.tableExists(Seq(database, tableName))) {
+    if (hiveContext.catalog.tableExists(tableIdentifier)) {
       if (allowExisting) {
         // table already exists, will do nothing, to keep consistent with Hive
       } else {
-        throw new AnalysisException(s"$database.$tableName already exists.")
+        throw new AnalysisException(s"$tableIdentifier already exists.")
       }
     } else {
       hiveContext.executePlan(InsertIntoTable(metastoreRelation, Map(), query, true, false)).toRdd
@@ -93,6 +93,6 @@ case class CreateTableAsSelect(
   }
 
   override def argString: String = {
-    s"[Database:$database, TableName: $tableName, InsertIntoHiveTable]"
+    s"[Database:${tableDesc.database}}, TableName: ${tableDesc.name}, InsertIntoHiveTable]"
   }
 }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
index 2b504ac974f0..2c81115ee4fe 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.hive.execution
 
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.hive.{HiveMetastoreTypes, HiveContext}
 import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
@@ -38,18 +39,18 @@ private[hive] case class CreateViewAsSelect(
   assert(tableDesc.schema == Nil || tableDesc.schema.length == childSchema.length)
   assert(tableDesc.viewText.isDefined)
 
+  val tableIdentifier = TableIdentifier(tableDesc.name, Some(tableDesc.database))
+
   override def run(sqlContext: SQLContext): Seq[Row] = {
     val hiveContext = sqlContext.asInstanceOf[HiveContext]
-    val database = tableDesc.database
-    val viewName = tableDesc.name
 
-    if (hiveContext.catalog.tableExists(Seq(database, viewName))) {
+    if (hiveContext.catalog.tableExists(tableIdentifier)) {
       if (allowExisting) {
         // view already exists, will do nothing, to keep consistent with Hive
       } else if (orReplace) {
         hiveContext.catalog.client.alertView(prepareTable())
       } else {
-        throw new AnalysisException(s"View $database.$viewName already exists. " +
+        throw new AnalysisException(s"View $tableIdentifier already exists. " +
           "If you want to update the view definition, please use ALTER VIEW AS or " +
           "CREATE OR REPLACE VIEW AS")
       }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
index 51ec92afd06e..94210a5394f9 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala
@@ -71,7 +71,7 @@ case class DropTable(
     }
     hiveContext.invalidateTable(tableName)
     hiveContext.runSqlHive(s"DROP TABLE $ifExistsClause$tableName")
-    hiveContext.catalog.unregisterTable(Seq(tableName))
+    hiveContext.catalog.unregisterTable(TableIdentifier(tableName))
     Seq.empty[Row]
   }
 }
@@ -103,7 +103,6 @@ case class AddFile(path: String) extends RunnableCommand {
   }
 }
 
-// TODO: Use TableIdentifier instead of String for tableName (SPARK-10104).
 private[hive]
 case class CreateMetastoreDataSource(
     tableIdent: TableIdentifier,
@@ -131,7 +130,7 @@ case class CreateMetastoreDataSource(
     val tableName = tableIdent.unquotedString
     val hiveContext = sqlContext.asInstanceOf[HiveContext]
 
-    if (hiveContext.catalog.tableExists(tableIdent.toSeq)) {
+    if (hiveContext.catalog.tableExists(tableIdent)) {
       if (allowExisting) {
         return Seq.empty[Row]
       } else {
@@ -160,7 +159,6 @@ case class CreateMetastoreDataSource(
   }
 }
 
-// TODO: Use TableIdentifier instead of String for tableName (SPARK-10104).
 private[hive]
 case class CreateMetastoreDataSourceAsSelect(
     tableIdent: TableIdentifier,
@@ -198,7 +196,7 @@ case class CreateMetastoreDataSourceAsSelect(
       }
 
     var existingSchema = None: Option[StructType]
-    if (sqlContext.catalog.tableExists(tableIdent.toSeq)) {
+    if (sqlContext.catalog.tableExists(tableIdent)) {
       // Check if we need to throw an exception or just return.
       mode match {
         case SaveMode.ErrorIfExists =>
@@ -215,7 +213,7 @@ case class CreateMetastoreDataSourceAsSelect(
           val resolved = ResolvedDataSource(
             sqlContext, Some(query.schema.asNullable), partitionColumns, provider, optionsWithPath)
           val createdRelation = LogicalRelation(resolved.relation)
-          EliminateSubQueries(sqlContext.catalog.lookupRelation(tableIdent.toSeq)) match {
+          EliminateSubQueries(sqlContext.catalog.lookupRelation(tableIdent)) match {
             case l @ LogicalRelation(_: InsertableRelation | _: HadoopFsRelation, _) =>
               if (l.relation != createdRelation.relation) {
                 val errorDescription =
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
index ff39ccb7c1ea..6883d305cbea 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/test/TestHive.scala
@@ -191,7 +191,7 @@ class TestHiveContext(sc: SparkContext) extends HiveContext(sc) {
       // Make sure any test tables referenced are loaded.
       val referencedTables =
         describedTables ++
-        logical.collect { case UnresolvedRelation(tableIdent, _) => tableIdent.last }
+        logical.collect { case UnresolvedRelation(tableIdent, _) => tableIdent.table }
       val referencedTestTables = referencedTables.filter(testTables.contains)
       logDebug(s"Query references test tables: ${referencedTestTables.mkString(", ")}")
       referencedTestTables.foreach(loadTestTable)
diff --git a/sql/hive/src/test/java/org/apache/spark/sql/hive/JavaMetastoreDataSourcesSuite.java b/sql/hive/src/test/java/org/apache/spark/sql/hive/JavaMetastoreDataSourcesSuite.java
index c8d272794d10..8c4af1b8eaf4 100644
--- a/sql/hive/src/test/java/org/apache/spark/sql/hive/JavaMetastoreDataSourcesSuite.java
+++ b/sql/hive/src/test/java/org/apache/spark/sql/hive/JavaMetastoreDataSourcesSuite.java
@@ -26,7 +26,6 @@
 
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
-import org.apache.spark.sql.SaveMode;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
@@ -41,6 +40,8 @@
 import org.apache.spark.sql.types.DataTypes;
 import org.apache.spark.sql.types.StructField;
 import org.apache.spark.sql.types.StructType;
+import org.apache.spark.sql.SaveMode;
+import org.apache.spark.sql.catalyst.TableIdentifier;
 import org.apache.spark.util.Utils;
 
 public class JavaMetastoreDataSourcesSuite {
@@ -71,7 +72,8 @@ public void setUp() throws IOException {
     if (path.exists()) {
       path.delete();
     }
-    hiveManagedPath = new Path(sqlContext.catalog().hiveDefaultTableFilePath("javaSavedTable"));
+    hiveManagedPath = new Path(sqlContext.catalog().hiveDefaultTableFilePath(
+      new TableIdentifier("javaSavedTable")));
     fs = hiveManagedPath.getFileSystem(sc.hadoopConfiguration());
     if (fs.exists(hiveManagedPath)){
       fs.delete(hiveManagedPath, true);
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/ListTablesSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/ListTablesSuite.scala
index 579631df772b..183aca29cf98 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/ListTablesSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/ListTablesSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.hive
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.sql.hive.test.TestHiveSingleton
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.QueryTest
 import org.apache.spark.sql.Row
 
@@ -31,14 +32,14 @@ class ListTablesSuite extends QueryTest with TestHiveSingleton with BeforeAndAft
 
   override def beforeAll(): Unit = {
     // The catalog in HiveContext is a case insensitive one.
-    catalog.registerTable(Seq("ListTablesSuiteTable"), df.logicalPlan)
+    catalog.registerTable(TableIdentifier("ListTablesSuiteTable"), df.logicalPlan)
     sql("CREATE TABLE HiveListTablesSuiteTable (key int, value string)")
     sql("CREATE DATABASE IF NOT EXISTS ListTablesSuiteDB")
     sql("CREATE TABLE ListTablesSuiteDB.HiveInDBListTablesSuiteTable (key int, value string)")
   }
 
   override def afterAll(): Unit = {
-    catalog.unregisterTable(Seq("ListTablesSuiteTable"))
+    catalog.unregisterTable(TableIdentifier("ListTablesSuiteTable"))
     sql("DROP TABLE IF EXISTS HiveListTablesSuiteTable")
     sql("DROP TABLE IF EXISTS ListTablesSuiteDB.HiveInDBListTablesSuiteTable")
     sql("DROP DATABASE IF EXISTS ListTablesSuiteDB")
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
index d3565380005a..d2928876887b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
@@ -30,6 +30,7 @@ import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.test.SQLTestUtils
 import org.apache.spark.sql.types._
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.util.Utils
 
 /**
@@ -367,7 +368,7 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
            |)
          """.stripMargin)
 
-      val expectedPath = catalog.hiveDefaultTableFilePath("ctasJsonTable")
+      val expectedPath = catalog.hiveDefaultTableFilePath(TableIdentifier("ctasJsonTable"))
       val filesystemPath = new Path(expectedPath)
       val fs = filesystemPath.getFileSystem(sparkContext.hadoopConfiguration)
       if (fs.exists(filesystemPath)) fs.delete(filesystemPath, true)
@@ -472,7 +473,7 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
           // Drop table will also delete the data.
           sql("DROP TABLE savedJsonTable")
           intercept[IOException] {
-            read.json(catalog.hiveDefaultTableFilePath("savedJsonTable"))
+            read.json(catalog.hiveDefaultTableFilePath(TableIdentifier("savedJsonTable")))
           }
         }
 
@@ -703,7 +704,7 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
 
         // Manually create a metastore data source table.
         catalog.createDataSourceTable(
-          tableName = "wide_schema",
+          tableIdent = TableIdentifier("wide_schema"),
           userSpecifiedSchema = Some(schema),
           partitionColumns = Array.empty[String],
           provider = "json",
@@ -733,7 +734,7 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
           "EXTERNAL" -> "FALSE"),
         tableType = ManagedTable,
         serdeProperties = Map(
-          "path" -> catalog.hiveDefaultTableFilePath(tableName)))
+          "path" -> catalog.hiveDefaultTableFilePath(TableIdentifier(tableName))))
 
       catalog.client.createTable(hiveTable)
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
index 6a692d6fce56..9bb32f11b76b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.hive
 import scala.reflect.ClassTag
 
 import org.apache.spark.sql.{Row, SQLConf, QueryTest}
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.execution.joins._
 import org.apache.spark.sql.hive.execution._
 import org.apache.spark.sql.hive.test.TestHiveSingleton
@@ -68,7 +69,7 @@ class StatisticsSuite extends QueryTest with TestHiveSingleton {
 
   test("analyze MetastoreRelations") {
     def queryTotalSize(tableName: String): BigInt =
-      hiveContext.catalog.lookupRelation(Seq(tableName)).statistics.sizeInBytes
+      hiveContext.catalog.lookupRelation(TableIdentifier(tableName)).statistics.sizeInBytes
 
     // Non-partitioned table
     sql("CREATE TABLE analyzeTable (key STRING, value STRING)").collect()
@@ -115,7 +116,7 @@ class StatisticsSuite extends QueryTest with TestHiveSingleton {
     intercept[UnsupportedOperationException] {
       hiveContext.analyze("tempTable")
     }
-    hiveContext.catalog.unregisterTable(Seq("tempTable"))
+    hiveContext.catalog.unregisterTable(TableIdentifier("tempTable"))
   }
 
   test("estimates the size of a test MetastoreRelation") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 6aa34605b05a..c929ba50680b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -22,7 +22,7 @@ import java.sql.{Date, Timestamp}
 import scala.collection.JavaConverters._
 
 import org.apache.spark.sql._
-import org.apache.spark.sql.catalyst.DefaultParserDialect
+import org.apache.spark.sql.catalyst.{TableIdentifier, DefaultParserDialect}
 import org.apache.spark.sql.catalyst.analysis.{FunctionRegistry, EliminateSubQueries}
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.execution.datasources.LogicalRelation
@@ -266,7 +266,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
 
   test("CTAS without serde") {
     def checkRelation(tableName: String, isDataSourceParquet: Boolean): Unit = {
-      val relation = EliminateSubQueries(catalog.lookupRelation(Seq(tableName)))
+      val relation = EliminateSubQueries(catalog.lookupRelation(TableIdentifier(tableName)))
       relation match {
         case LogicalRelation(r: ParquetRelation, _) =>
           if (!isDataSourceParquet) {
@@ -723,7 +723,7 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
     (1 to 100).par.map { i =>
       val tableName = s"SPARK_6618_table_$i"
       sql(s"CREATE TABLE $tableName (col1 string)")
-      catalog.lookupRelation(Seq(tableName))
+      catalog.lookupRelation(TableIdentifier(tableName))
       table(tableName)
       tables()
       sql(s"DROP TABLE $tableName")
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
index 5eb39b112970..7efeab528c1d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/orc/OrcQuerySuite.scala
@@ -24,6 +24,7 @@ import org.apache.hadoop.hive.ql.io.orc.CompressionKind
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.hive.test.TestHive._
 import org.apache.spark.sql.hive.test.TestHive.implicits._
 
@@ -218,7 +219,7 @@ class OrcQuerySuite extends QueryTest with BeforeAndAfterAll with OrcTest {
       sql("INSERT INTO TABLE t SELECT * FROM tmp")
       checkAnswer(table("t"), (data ++ data).map(Row.fromTuple))
     }
-    catalog.unregisterTable(Seq("tmp"))
+    catalog.unregisterTable(TableIdentifier("tmp"))
   }
 
   test("overwriting") {
@@ -228,7 +229,7 @@ class OrcQuerySuite extends QueryTest with BeforeAndAfterAll with OrcTest {
       sql("INSERT OVERWRITE TABLE t SELECT * FROM tmp")
       checkAnswer(table("t"), data.map(Row.fromTuple))
     }
-    catalog.unregisterTable(Seq("tmp"))
+    catalog.unregisterTable(TableIdentifier("tmp"))
   }
 
   test("self-join") {

From 2b5e31c7e97811ef7b4da47609973b7f51444346 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 14 Oct 2015 16:27:43 -0700
Subject: [PATCH 241/896] [SPARK-11113] [SQL] Remove DeveloperApi annotation
 from private classes.

o.a.s.sql.catalyst and o.a.s.sql.execution are supposed to be private.

Author: Reynold Xin <rxin@databricks.com>

Closes #9121 from rxin/SPARK-11113.
---
 .../expressions/codegen/package.scala         |  3 --
 .../spark/sql/execution/Aggregate.scala       |  3 --
 .../apache/spark/sql/execution/Exchange.scala |  5 +---
 .../spark/sql/execution/ExistingRDD.scala     |  6 +---
 .../apache/spark/sql/execution/Expand.scala   |  2 --
 .../apache/spark/sql/execution/Generate.scala |  3 --
 .../spark/sql/execution/LocalTableScan.scala  |  3 +-
 .../spark/sql/execution/QueryExecution.scala  |  7 ++---
 .../spark/sql/execution/ShuffledRowRDD.scala  |  1 -
 .../spark/sql/execution/SparkPlan.scala       |  6 ++--
 .../apache/spark/sql/execution/Window.scala   | 10 ++-----
 .../spark/sql/execution/basicOperators.scala  | 28 ++----------------
 .../apache/spark/sql/execution/commands.scala | 29 +++----------------
 .../execution/joins/BroadcastHashJoin.scala   |  3 --
 .../joins/BroadcastHashOuterJoin.scala        |  3 --
 .../joins/BroadcastLeftSemiJoinHash.scala     |  3 --
 .../joins/BroadcastNestedLoopJoin.scala       |  6 +---
 .../execution/joins/CartesianProduct.scala    |  6 +---
 .../sql/execution/joins/HashOuterJoin.scala   |  9 ++----
 .../sql/execution/joins/LeftSemiJoinBNL.scala |  3 --
 .../execution/joins/LeftSemiJoinHash.scala    |  3 --
 .../execution/joins/ShuffledHashJoin.scala    |  3 --
 .../joins/ShuffledHashOuterJoin.scala         |  3 --
 .../sql/execution/joins/SortMergeJoin.scala   |  3 --
 .../execution/joins/SortMergeOuterJoin.scala  |  3 --
 .../spark/sql/execution/joins/package.scala   |  6 ----
 .../apache/spark/sql/execution/python.scala   |  7 +----
 .../sql/execution/rowFormatConverters.scala   |  5 ----
 .../spark/sql/test/ExamplePointUDT.scala      |  3 --
 29 files changed, 22 insertions(+), 153 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/package.scala
index 606fecbe06e4..41128fe389d4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/package.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.sql.catalyst.rules
 import org.apache.spark.util.Utils
 
@@ -40,10 +39,8 @@ package object codegen {
   }
 
   /**
-   * :: DeveloperApi ::
    * Dumps the bytecode from a class to the screen using javap.
    */
-  @DeveloperApi
   object DumpByteCode {
     import scala.sys.process._
     val dumpDirectory = Utils.createTempDir()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala
index f3b6a3a5f4a3..6f3f1bd97ad5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql.execution
 
 import java.util.HashMap
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
@@ -28,7 +27,6 @@ import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Groups input data by `groupingExpressions` and computes the `aggregateExpressions` for each
  * group.
  *
@@ -38,7 +36,6 @@ import org.apache.spark.sql.execution.metric.SQLMetrics
  * @param aggregateExpressions expressions that are computed for each group.
  * @param child the input data source.
  */
-@DeveloperApi
 case class Aggregate(
     partial: Boolean,
     groupingExpressions: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 8efa471600b1..289453753f18 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.execution
 
 import java.util.Random
 
-import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.hash.HashShuffleManager
@@ -33,13 +33,10 @@ import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjectio
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.util.MutablePair
-import org.apache.spark._
 
 /**
- * :: DeveloperApi ::
  * Performs a shuffle that will result in the desired `newPartitioning`.
  */
-@DeveloperApi
 case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends UnaryNode {
 
   override def nodeName: String = if (tungstenMode) "TungstenExchange" else "Exchange"
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
index abb60cf12e3a..87bd92e00a2c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
 import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
@@ -27,10 +26,7 @@ import org.apache.spark.sql.sources.BaseRelation
 import org.apache.spark.sql.types.DataType
 import org.apache.spark.sql.{Row, SQLContext}
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 object RDDConversions {
   def productToRowRdd[A <: Product](data: RDD[A], outputTypes: Seq[DataType]): RDD[InternalRow] = {
     data.mapPartitions { iterator =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
index d90cae1c4c06..a458881f4094 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
@@ -32,7 +31,6 @@ import org.apache.spark.sql.catalyst.plans.physical.{Partitioning, UnknownPartit
  * @param output      The output Schema
  * @param child       Child operator
  */
-@DeveloperApi
 case class Expand(
     projections: Seq[Seq[Expression]],
     output: Seq[Attribute],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
index c3c0dc441c92..78e33d9f233a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -35,7 +34,6 @@ private[execution] sealed case class LazyIterator(func: () => TraversableOnce[In
 }
 
 /**
- * :: DeveloperApi ::
  * Applies a [[Generator]] to a stream of input rows, combining the
  * output of each into a new stream of rows.  This operation is similar to a `flatMap` in functional
  * programming with one important additional feature, which allows the input rows to be joined with
@@ -48,7 +46,6 @@ private[execution] sealed case class LazyIterator(func: () => TraversableOnce[In
  * @param output the output attributes of this node, which constructed in analysis phase,
  *               and we can not change it, as the parent node bound with it already.
  */
-@DeveloperApi
 case class Generate(
     generator: Generator,
     join: Boolean,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
index adb6bbc4acc5..ba7f6287ac6c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/LocalTableScan.scala
@@ -18,8 +18,7 @@
 package org.apache.spark.sql.execution
 
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.Row
-import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.Attribute
 
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
index 7bb4133a2905..fc9174549e64 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
@@ -17,18 +17,15 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.{Experimental, DeveloperApi}
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.{InternalRow, optimizer}
-import org.apache.spark.sql.{SQLContext, Row}
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 
 /**
- * :: DeveloperApi ::
  * The primary workflow for executing relational queries using Spark.  Designed to allow easy
  * access to the intermediate phases of query execution for developers.
  */
-@DeveloperApi
 class QueryExecution(val sqlContext: SQLContext, val logical: LogicalPlan) {
   val analyzer = sqlContext.analyzer
   val optimizer = sqlContext.optimizer
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
index 743c99a899c6..fb338b90bf79 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
@@ -21,7 +21,6 @@ import org.apache.spark._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.serializer.Serializer
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.types.DataType
 
 private class ShuffledRowRDDPartition(val idx: Int) extends Partition {
   override val index: Int = idx
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
index fcb42047ffe6..8bb293ae87e6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
@@ -22,7 +22,6 @@ import java.util.concurrent.atomic.AtomicBoolean
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.{RDD, RDDOperationScope}
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.catalyst.InternalRow
@@ -32,7 +31,7 @@ import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.expressions.codegen._
 import org.apache.spark.sql.catalyst.plans.QueryPlan
 import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetric, SQLMetrics}
+import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetric}
 import org.apache.spark.sql.types.DataType
 
 object SparkPlan {
@@ -40,9 +39,8 @@ object SparkPlan {
 }
 
 /**
- * :: DeveloperApi ::
+ * The base class for physical operators.
  */
-@DeveloperApi
 abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializable {
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
index 55035f4bc5f2..53c5ccf8fa37 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
@@ -17,19 +17,14 @@
 
 package org.apache.spark.sql.execution
 
-import java.util
-
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.types.IntegerType
 import org.apache.spark.rdd.RDD
 import org.apache.spark.util.collection.CompactBuffer
-import scala.collection.mutable
 
 /**
- * :: DeveloperApi ::
  * This class calculates and outputs (windowed) aggregates over the rows in a single (sorted)
  * partition. The aggregates are calculated for each row in the group. Special processing
  * instructions, frames, are used to calculate these aggregates. Frames are processed in the order
@@ -76,7 +71,6 @@ import scala.collection.mutable
  * Entire Partition, Sliding, Growing & Shrinking. Boundary evaluation is also delegated to a pair
  * of specialized classes: [[RowBoundOrdering]] & [[RangeBoundOrdering]].
  */
-@DeveloperApi
 case class Window(
     projectList: Seq[Attribute],
     windowExpression: Seq[NamedExpression],
@@ -229,7 +223,7 @@ case class Window(
     // function result buffer.
     val framedWindowExprs = windowExprs.groupBy(_.windowSpec.frameSpecification)
     val factories = Array.ofDim[() => WindowFunctionFrame](framedWindowExprs.size)
-    val unboundExpressions = mutable.Buffer.empty[Expression]
+    val unboundExpressions = scala.collection.mutable.Buffer.empty[Expression]
     framedWindowExprs.zipWithIndex.foreach {
       case ((frame, unboundFrameExpressions), index) =>
         // Track the ordinal.
@@ -529,7 +523,7 @@ private[execution] final class SlidingWindowFunctionFrame(
   private[this] var inputLowIndex = 0
 
   /** Buffer used for storing prepared input for the window functions. */
-  private[this] val buffer = new util.ArrayDeque[Array[AnyRef]]
+  private[this] val buffer = new java.util.ArrayDeque[Array[AnyRef]]
 
   /** Index of the row we are currently writing. */
   private[this] var outputIndex = 0
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 7804b67ac236..4db9f4ee67bb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD, ShuffledRDD}
 import org.apache.spark.shuffle.sort.SortShuffleManager
 import org.apache.spark.sql.catalyst.InternalRow
@@ -28,10 +27,7 @@ import org.apache.spark.util.MutablePair
 import org.apache.spark.util.random.PoissonSampler
 import org.apache.spark.{HashPartitioner, SparkEnv}
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class Project(projectList: Seq[NamedExpression], child: SparkPlan) extends UnaryNode {
   override def output: Seq[Attribute] = projectList.map(_.toAttribute)
 
@@ -90,10 +86,6 @@ case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan)
 }
 
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
 case class Filter(condition: Expression, child: SparkPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output
 
@@ -125,8 +117,8 @@ case class Filter(condition: Expression, child: SparkPlan) extends UnaryNode {
 }
 
 /**
- * :: DeveloperApi ::
  * Sample the dataset.
+ *
  * @param lowerBound Lower-bound of the sampling probability (usually 0.0)
  * @param upperBound Upper-bound of the sampling probability. The expected fraction sampled
  *                   will be ub - lb.
@@ -134,7 +126,6 @@ case class Filter(condition: Expression, child: SparkPlan) extends UnaryNode {
  * @param seed the random seed
  * @param child the SparkPlan
  */
-@DeveloperApi
 case class Sample(
     lowerBound: Double,
     upperBound: Double,
@@ -165,9 +156,8 @@ case class Sample(
 }
 
 /**
- * :: DeveloperApi ::
+ * Union two plans, without a distinct. This is UNION ALL in SQL.
  */
-@DeveloperApi
 case class Union(children: Seq[SparkPlan]) extends SparkPlan {
   // TODO: attributes output by union should be distinct for nullability purposes
   override def output: Seq[Attribute] = children.head.output
@@ -179,14 +169,12 @@ case class Union(children: Seq[SparkPlan]) extends SparkPlan {
 }
 
 /**
- * :: DeveloperApi ::
  * Take the first limit elements. Note that the implementation is different depending on whether
  * this is a terminal operator or not. If it is terminal and is invoked using executeCollect,
  * this operator uses something similar to Spark's take method on the Spark driver. If it is not
  * terminal or is invoked using execute, we first take the limit on each partition, and then
  * repartition all the data to a single partition to compute the global limit.
  */
-@DeveloperApi
 case class Limit(limit: Int, child: SparkPlan)
   extends UnaryNode {
   // TODO: Implement a partition local limit, and use a strategy to generate the proper limit plan:
@@ -219,14 +207,12 @@ case class Limit(limit: Int, child: SparkPlan)
 }
 
 /**
- * :: DeveloperApi ::
  * Take the first limit elements as defined by the sortOrder, and do projection if needed.
  * This is logically equivalent to having a [[Limit]] operator after a [[Sort]] operator,
  * or having a [[Project]] operator between them.
  * This could have been named TopK, but Spark's top operator does the opposite in ordering
  * so we name it TakeOrdered to avoid confusion.
  */
-@DeveloperApi
 case class TakeOrderedAndProject(
     limit: Int,
     sortOrder: Seq[SortOrder],
@@ -271,13 +257,11 @@ case class TakeOrderedAndProject(
 }
 
 /**
- * :: DeveloperApi ::
  * Return a new RDD that has exactly `numPartitions` partitions.
  * Similar to coalesce defined on an [[RDD]], this operation results in a narrow dependency, e.g.
  * if you go from 1000 partitions to 100 partitions, there will not be a shuffle, instead each of
  * the 100 new partitions will claim 10 of the current partitions.
  */
-@DeveloperApi
 case class Coalesce(numPartitions: Int, child: SparkPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output
 
@@ -294,11 +278,9 @@ case class Coalesce(numPartitions: Int, child: SparkPlan) extends UnaryNode {
 }
 
 /**
- * :: DeveloperApi ::
  * Returns a table with the elements from left that are not in right using
  * the built-in spark subtract function.
  */
-@DeveloperApi
 case class Except(left: SparkPlan, right: SparkPlan) extends BinaryNode {
   override def output: Seq[Attribute] = left.output
 
@@ -308,11 +290,9 @@ case class Except(left: SparkPlan, right: SparkPlan) extends BinaryNode {
 }
 
 /**
- * :: DeveloperApi ::
  * Returns the rows in left that also appear in right using the built in spark
  * intersection function.
  */
-@DeveloperApi
 case class Intersect(left: SparkPlan, right: SparkPlan) extends BinaryNode {
   override def output: Seq[Attribute] = children.head.output
 
@@ -322,12 +302,10 @@ case class Intersect(left: SparkPlan, right: SparkPlan) extends BinaryNode {
 }
 
 /**
- * :: DeveloperApi ::
  * A plan node that does nothing but lie about the output of its child.  Used to spice a
  * (hopefully structurally equivalent) tree from a different optimization sequence into an already
  * resolved tree.
  */
-@DeveloperApi
 case class OutputFaker(output: Seq[Attribute], child: SparkPlan) extends SparkPlan {
   def children: Seq[SparkPlan] = child :: Nil
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index 05ccc53830bd..856607615ae8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -20,11 +20,10 @@ package org.apache.spark.sql.execution
 import java.util.NoSuchElementException
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
 import org.apache.spark.sql.catalyst.errors.TreeNodeException
-import org.apache.spark.sql.catalyst.expressions.{ExpressionDescription, Expression, Attribute, AttributeReference}
+import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference}
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.types._
@@ -74,10 +73,7 @@ private[sql] case class ExecutedCommand(cmd: RunnableCommand) extends SparkPlan
   override def argString: String = cmd.toString
 }
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableCommand with Logging {
 
   private def keyValueOutput: Seq[Attribute] = {
@@ -180,10 +176,7 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
  *
  * Note that this command takes in a logical plan, runs the optimizer on the logical plan
  * (but do NOT actually execute it).
- *
- * :: DeveloperApi ::
  */
-@DeveloperApi
 case class ExplainCommand(
     logicalPlan: LogicalPlan,
     override val output: Seq[Attribute] =
@@ -203,10 +196,7 @@ case class ExplainCommand(
   }
 }
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class CacheTableCommand(
     tableName: String,
     plan: Option[LogicalPlan],
@@ -231,10 +221,6 @@ case class CacheTableCommand(
 }
 
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
 case class UncacheTableCommand(tableName: String) extends RunnableCommand {
 
   override def run(sqlContext: SQLContext): Seq[Row] = {
@@ -246,10 +232,8 @@ case class UncacheTableCommand(tableName: String) extends RunnableCommand {
 }
 
 /**
- * :: DeveloperApi ::
  * Clear all cached data from the in-memory cache.
  */
-@DeveloperApi
 case object ClearCacheCommand extends RunnableCommand {
 
   override def run(sqlContext: SQLContext): Seq[Row] = {
@@ -260,10 +244,7 @@ case object ClearCacheCommand extends RunnableCommand {
   override def output: Seq[Attribute] = Seq.empty
 }
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class DescribeCommand(
     child: SparkPlan,
     override val output: Seq[Attribute],
@@ -286,9 +267,7 @@ case class DescribeCommand(
  * {{{
  *    SHOW TABLES [IN databaseName]
  * }}}
- * :: DeveloperApi ::
  */
-@DeveloperApi
 case class ShowTablesCommand(databaseName: Option[String]) extends RunnableCommand {
 
   // The result of SHOW TABLES has two columns, tableName and isTemporary.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoin.scala
index 2e108cb81451..1d381e2eaef3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoin.scala
@@ -20,7 +20,6 @@ package org.apache.spark.sql.execution.joins
 import scala.concurrent._
 import scala.concurrent.duration._
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.Expression
@@ -31,13 +30,11 @@ import org.apache.spark.util.ThreadUtils
 import org.apache.spark.{InternalAccumulator, TaskContext}
 
 /**
- * :: DeveloperApi ::
  * Performs an inner hash join of two child relations.  When the output RDD of this operator is
  * being constructed, a Spark job is asynchronously started to calculate the values for the
  * broadcasted relation.  This data is then placed in a Spark broadcast variable.  The streamed
  * relation is not shuffled.
  */
-@DeveloperApi
 case class BroadcastHashJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashOuterJoin.scala
index 69a8b95eaa7e..ab81bd7b3fc0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashOuterJoin.scala
@@ -20,7 +20,6 @@ package org.apache.spark.sql.execution.joins
 import scala.concurrent._
 import scala.concurrent.duration._
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -31,13 +30,11 @@ import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.{InternalAccumulator, TaskContext}
 
 /**
- * :: DeveloperApi ::
  * Performs a outer hash join for two child relations.  When the output RDD of this operator is
  * being constructed, a Spark job is asynchronously started to calculate the values for the
  * broadcasted relation.  This data is then placed in a Spark broadcast variable.  The streamed
  * relation is not shuffled.
  */
-@DeveloperApi
 case class BroadcastHashOuterJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
index 78a8c16c62bc..c5cd6a2fd637 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.sql.execution.joins
 
 import org.apache.spark.{InternalAccumulator, TaskContext}
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -26,11 +25,9 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Build the right table's join keys into a HashSet, and iteratively go through the left
  * table, to find the if join keys are in the Hash set.
  */
-@DeveloperApi
 case class BroadcastLeftSemiJoinHash(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
index 28c88b1b03d0..efef8c8a8b96 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution.joins
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -27,10 +26,7 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.util.collection.CompactBuffer
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class BroadcastNestedLoopJoin(
     left: SparkPlan,
     right: SparkPlan,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
index 2115f4070228..0243e196dbc3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
@@ -17,17 +17,13 @@
 
 package org.apache.spark.sql.execution.joins
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{Attribute, JoinedRow}
 import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
-/**
- * :: DeveloperApi ::
- */
-@DeveloperApi
+
 case class CartesianProduct(left: SparkPlan, right: SparkPlan) extends BinaryNode {
   override def output: Seq[Attribute] = left.output ++ right.output
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
index 66903347c88c..15b06b1537f8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
@@ -17,9 +17,6 @@
 
 package org.apache.spark.sql.execution.joins
 
-import java.util.{HashMap => JavaHashMap}
-
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans._
@@ -27,7 +24,7 @@ import org.apache.spark.sql.execution.SparkPlan
 import org.apache.spark.sql.execution.metric.LongSQLMetric
 import org.apache.spark.util.collection.CompactBuffer
 
-@DeveloperApi
+
 trait HashOuterJoin {
   self: SparkPlan =>
 
@@ -230,8 +227,8 @@ trait HashOuterJoin {
   protected[this] def buildHashTable(
       iter: Iterator[InternalRow],
       numIterRows: LongSQLMetric,
-      keyGenerator: Projection): JavaHashMap[InternalRow, CompactBuffer[InternalRow]] = {
-    val hashTable = new JavaHashMap[InternalRow, CompactBuffer[InternalRow]]()
+      keyGenerator: Projection): java.util.HashMap[InternalRow, CompactBuffer[InternalRow]] = {
+    val hashTable = new java.util.HashMap[InternalRow, CompactBuffer[InternalRow]]()
     while (iter.hasNext) {
       val currentRow = iter.next()
       numIterRows += 1
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinBNL.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinBNL.scala
index ad6362542f2f..efa7b49410ed 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinBNL.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinBNL.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution.joins
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -26,11 +25,9 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Using BroadcastNestedLoopJoin to calculate left semi join result when there's no join keys
  * for hash join.
  */
-@DeveloperApi
 case class LeftSemiJoinBNL(
     streamed: SparkPlan, broadcast: SparkPlan, condition: Option[Expression])
   extends BinaryNode {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinHash.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinHash.scala
index 18808adaac63..bf3b05be981f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinHash.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/LeftSemiJoinHash.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution.joins
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -26,11 +25,9 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Build the right table's join keys into a HashSet, and iteratively go through the left
  * table, to find the if join keys are in the Hash set.
  */
-@DeveloperApi
 case class LeftSemiJoinHash(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
index fc8c9439a6f0..755986af8b95 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution.joins
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.Expression
@@ -26,11 +25,9 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Performs an inner hash join of two child relations by first shuffling the data using the join
  * keys.
  */
-@DeveloperApi
 case class ShuffledHashJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala
index d800c7456bda..6b2cb9d8f689 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql.execution.joins
 
 import scala.collection.JavaConverters._
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -29,11 +28,9 @@ import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 
 /**
- * :: DeveloperApi ::
  * Performs a hash based outer join for two child relations by shuffling the data using
  * the join keys. This operator requires loading the associated partition in both side into memory.
  */
-@DeveloperApi
 case class ShuffledHashOuterJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
index 70a1af6a7063..17030947b7bb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql.execution.joins
 
 import scala.collection.mutable.ArrayBuffer
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -28,10 +27,8 @@ import org.apache.spark.sql.execution.{BinaryNode, RowIterator, SparkPlan}
 import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetrics}
 
 /**
- * :: DeveloperApi ::
  * Performs an sort merge join of two child relations.
  */
-@DeveloperApi
 case class SortMergeJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
index c117dff9c8b1..7e854e6702f7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql.execution.joins
 
 import scala.collection.mutable.ArrayBuffer
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -30,10 +29,8 @@ import org.apache.spark.sql.execution.{BinaryNode, RowIterator, SparkPlan}
 import org.apache.spark.util.collection.BitSet
 
 /**
- * :: DeveloperApi ::
  * Performs an sort merge outer join of two child relations.
  */
-@DeveloperApi
 case class SortMergeOuterJoin(
     leftKeys: Seq[Expression],
     rightKeys: Seq[Expression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/package.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/package.scala
index 7f2ab1765b28..134376628ae7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/package.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/package.scala
@@ -17,21 +17,15 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
-
 /**
- * :: DeveloperApi ::
  * Physical execution operators for join operations.
  */
 package object joins {
 
-  @DeveloperApi
   sealed abstract class BuildSide
 
-  @DeveloperApi
   case object BuildRight extends BuildSide
 
-  @DeveloperApi
   case object BuildLeft extends BuildSide
 
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
index 5dbe0fc5f95c..d4e6980967e8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
@@ -24,12 +24,11 @@ import scala.collection.JavaConverters._
 
 import net.razorvine.pickle._
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.api.python.{PythonRunner, PythonBroadcast, PythonRDD, SerDeUtil}
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.DataFrame
-import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
@@ -320,10 +319,8 @@ object EvaluatePython {
 }
 
 /**
- * :: DeveloperApi ::
  * Evaluates a [[PythonUDF]], appending the result to the end of the input tuple.
  */
-@DeveloperApi
 case class EvaluatePython(
     udf: PythonUDF,
     child: LogicalPlan,
@@ -337,7 +334,6 @@ case class EvaluatePython(
 }
 
 /**
- * :: DeveloperApi ::
  * Uses PythonRDD to evaluate a [[PythonUDF]], one partition of tuples at a time.
  *
  * Python evaluation works by sending the necessary (projected) input data via a socket to an
@@ -347,7 +343,6 @@ case class EvaluatePython(
  * we drain the queue to find the original input row. Note that if the Python process is way too
  * slow, this could lead to the queue growing unbounded and eventually run out of memory.
  */
-@DeveloperApi
 case class BatchPythonEvaluation(udf: PythonUDF, output: Seq[Attribute], child: SparkPlan)
   extends SparkPlan {
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
index 855555dd1d4c..0e601cd2cab5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -25,10 +24,8 @@ import org.apache.spark.sql.catalyst.plans.physical.Partitioning
 import org.apache.spark.sql.catalyst.rules.Rule
 
 /**
- * :: DeveloperApi ::
  * Converts Java-object-based rows into [[UnsafeRow]]s.
  */
-@DeveloperApi
 case class ConvertToUnsafe(child: SparkPlan) extends UnaryNode {
 
   require(UnsafeProjection.canSupport(child.schema), s"Cannot convert ${child.schema} to Unsafe")
@@ -48,10 +45,8 @@ case class ConvertToUnsafe(child: SparkPlan) extends UnaryNode {
 }
 
 /**
- * :: DeveloperApi ::
  * Converts [[UnsafeRow]]s back into Java-object-based rows.
  */
-@DeveloperApi
 case class ConvertToSafe(child: SparkPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output
   override def outputPartitioning: Partitioning = child.outputPartitioning
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
index 963e6030c14c..a741a45f1c52 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
@@ -17,9 +17,6 @@
 
 package org.apache.spark.sql.test
 
-import java.util
-
-import scala.collection.JavaConverters._
 import org.apache.spark.sql.types._
 
 /**

From 1baaf2b9bd7c949a8f95cd14fc1be2a56e1139b3 Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Wed, 14 Oct 2015 16:29:32 -0700
Subject: [PATCH 242/896] [SPARK-10829] [SQL] Filter combine partition key and
 attribute doesn't work in DataSource scan

```scala
withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true") {
      withTempPath { dir =>
        val path = s"${dir.getCanonicalPath}/part=1"
        (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(path)

        // If the "part = 1" filter gets pushed down, this query will throw an exception since
        // "part" is not a valid column in the actual Parquet file
        checkAnswer(
          sqlContext.read.parquet(path).filter("a > 0 and (part = 0 or a > 1)"),
          (2 to 3).map(i => Row(i, i.toString, 1)))
      }
    }
```

We expect the result to be:
```
2,1
3,1
```
But got
```
1,1
2,1
3,1
```

Author: Cheng Hao <hao.cheng@intel.com>

Closes #8916 from chenghao-intel/partition_filter.
---
 .../datasources/DataSourceStrategy.scala      | 34 ++++++++++++-------
 .../parquet/ParquetFilterSuite.scala          | 17 ++++++++++
 2 files changed, 39 insertions(+), 12 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 918db8e7d083..33181fa6c065 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -62,7 +62,22 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     // Scanning partitioned HadoopFsRelation
     case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation, _))
         if t.partitionSpec.partitionColumns.nonEmpty =>
-      val selectedPartitions = prunePartitions(filters, t.partitionSpec).toArray
+      // We divide the filter expressions into 3 parts
+      val partitionColumnNames = t.partitionSpec.partitionColumns.map(_.name).toSet
+
+      // TODO this is case-sensitive
+      // Only prunning the partition keys
+      val partitionFilters =
+        filters.filter(_.references.map(_.name).toSet.subsetOf(partitionColumnNames))
+
+      // Only pushes down predicates that do not reference partition keys.
+      val pushedFilters =
+        filters.filter(_.references.map(_.name).toSet.intersect(partitionColumnNames).isEmpty)
+
+      // Predicates with both partition keys and attributes
+      val combineFilters = filters.toSet -- partitionFilters.toSet -- pushedFilters.toSet
+
+      val selectedPartitions = prunePartitions(partitionFilters, t.partitionSpec).toArray
 
       logInfo {
         val total = t.partitionSpec.partitions.length
@@ -71,21 +86,16 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         s"Selected $selected partitions out of $total, pruned $percentPruned% partitions."
       }
 
-      // Only pushes down predicates that do not reference partition columns.
-      val pushedFilters = {
-        val partitionColumnNames = t.partitionSpec.partitionColumns.map(_.name).toSet
-        filters.filter { f =>
-          val referencedColumnNames = f.references.map(_.name).toSet
-          referencedColumnNames.intersect(partitionColumnNames).isEmpty
-        }
-      }
-
-      buildPartitionedTableScan(
+      val scan = buildPartitionedTableScan(
         l,
         projects,
         pushedFilters,
         t.partitionSpec.partitionColumns,
-        selectedPartitions) :: Nil
+        selectedPartitions)
+
+      combineFilters
+        .reduceLeftOption(expressions.And)
+        .map(execution.Filter(_, scan)).getOrElse(scan) :: Nil
 
     // Scanning non-partitioned HadoopFsRelation
     case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation, _)) =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 45ad3fde559c..7a23f57f4039 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -297,4 +297,21 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
       }
     }
   }
+
+  test("SPARK-10829: Filter combine partition key and attribute doesn't work in DataSource scan") {
+    import testImplicits._
+
+    withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true") {
+      withTempPath { dir =>
+        val path = s"${dir.getCanonicalPath}/part=1"
+        (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(path)
+
+        // If the "part = 1" filter gets pushed down, this query will throw an exception since
+        // "part" is not a valid column in the actual Parquet file
+        checkAnswer(
+          sqlContext.read.parquet(path).filter("a > 0 and (part = 0 or a > 1)"),
+          (2 to 3).map(i => Row(i, i.toString, 1)))
+      }
+    }
+  }
 }

From 4ace4f8a9c91beb21a0077e12b75637a4560a542 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 14 Oct 2015 17:27:27 -0700
Subject: [PATCH 243/896] [SPARK-11017] [SQL] Support ImperativeAggregates in
 TungstenAggregate

This patch extends TungstenAggregate to support ImperativeAggregate functions. The existing TungstenAggregate operator only supported DeclarativeAggregate functions, which are defined in terms of Catalyst expressions and can be evaluated via generated projections. ImperativeAggregate functions, on the other hand, are evaluated by calling their `initialize`, `update`, `merge`, and `eval` methods.

The basic strategy here is similar to how SortBasedAggregate evaluates both types of aggregate functions: use a generated projection to evaluate the expression-based declarative aggregates with dummy placeholder expressions inserted in place of the imperative aggregate function output, then invoke the imperative aggregate functions and target them against the aggregation buffer. The bulk of the diff here consists of code that was copied and adapted from SortBasedAggregate, with some key changes to handle TungstenAggregate's sort fallback path.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9038 from JoshRosen/support-interpreted-in-tungsten-agg-final.
---
 .../expressions/aggregate/functions.scala     |  19 +-
 .../expressions/aggregate/interfaces.scala    |  31 +-
 .../aggregate/AggregationIterator.scala       |  29 +-
 .../aggregate/TungstenAggregate.scala         |  22 +-
 .../TungstenAggregationIterator.scala         | 250 ++++++++++++----
 .../spark/sql/execution/aggregate/udaf.scala  |  79 +++--
 .../spark/sql/execution/aggregate/utils.scala | 269 +++++++++---------
 .../TungstenAggregationIteratorSuite.scala    |   2 +-
 .../org/apache/spark/sql/hive/hiveUDFs.scala  |  16 +-
 9 files changed, 457 insertions(+), 260 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 8aad0b7dee05..c0bc7ec09c34 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -472,10 +472,20 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
  * @param relativeSD the maximum estimation error allowed.
  */
 // scalastyle:on
-case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
-    extends ImperativeAggregate {
+case class HyperLogLogPlusPlus(
+    child: Expression,
+    relativeSD: Double = 0.05,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends ImperativeAggregate {
   import HyperLogLogPlusPlus._
 
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
   /**
    * HLL++ uses 'p' bits for addressing. The more addressing bits we use, the more precise the
    * algorithm will be, and the more memory it will require. The 'p' value is based on the relative
@@ -546,6 +556,11 @@ case class HyperLogLogPlusPlus(child: Expression, relativeSD: Double = 0.05)
     AttributeReference(s"MS[$i]", LongType)()
   }
 
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
+
   /** Fill all words with zeros. */
   override def initialize(buffer: MutableRow): Unit = {
     var word = 0
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index 9ba3a9c98045..a2fab258fcac 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -150,6 +150,10 @@ sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInp
  * We need to perform similar field number arithmetic when merging multiple intermediate
  * aggregate buffers together in `merge()` (in this case, use `inputAggBufferOffset` when accessing
  * the input buffer).
+ *
+ * Correct ImperativeAggregate evaluation depends on the correctness of `mutableAggBufferOffset` and
+ * `inputAggBufferOffset`, but not on the correctness of the attribute ids in `aggBufferAttributes`
+ * and `inputAggBufferAttributes`.
  */
 abstract class ImperativeAggregate extends AggregateFunction2 {
 
@@ -172,11 +176,13 @@ abstract class ImperativeAggregate extends AggregateFunction2 {
    *                     avg(y) mutableAggBufferOffset = 2
    *
    */
-  protected var mutableAggBufferOffset: Int = 0
+  protected val mutableAggBufferOffset: Int
 
-  def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): Unit = {
-    mutableAggBufferOffset = newMutableAggBufferOffset
-  }
+  /**
+   * Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset.
+   * This new copy's attributes may have different ids than the original.
+   */
+  def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate
 
   /**
    * The offset of this function's start buffer value in the underlying shared input aggregation
@@ -203,11 +209,17 @@ abstract class ImperativeAggregate extends AggregateFunction2 {
    *                       avg(y) inputAggBufferOffset = 3
    *
    */
-  protected var inputAggBufferOffset: Int = 0
+  protected val inputAggBufferOffset: Int
 
-  def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): Unit = {
-    inputAggBufferOffset = newInputAggBufferOffset
-  }
+  /**
+   * Returns a copy of this ImperativeAggregate with an updated mutableAggBufferOffset.
+   * This new copy's attributes may have different ids than the original.
+   */
+  def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate
+
+  // Note: although all subclasses implement inputAggBufferAttributes by simply cloning
+  // aggBufferAttributes, that common clone code cannot be placed here in the abstract
+  // ImperativeAggregate class, since that will lead to initialization ordering issues.
 
   /**
    * Initializes the mutable aggregation buffer located in `mutableAggBuffer`.
@@ -231,9 +243,6 @@ abstract class ImperativeAggregate extends AggregateFunction2 {
    * Use `fieldNumber + inputAggBufferOffset` to access fields of `inputAggBuffer`.
    */
   def merge(mutableAggBuffer: MutableRow, inputAggBuffer: InternalRow): Unit
-
-  final lazy val inputAggBufferAttributes: Seq[AttributeReference] =
-    aggBufferAttributes.map(_.newInstance())
 }
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index 8e0fbd109b41..99fb7a40b72e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -83,7 +83,7 @@ abstract class AggregationIterator(
     var i = 0
     while (i < allAggregateExpressions.length) {
       val func = allAggregateExpressions(i).aggregateFunction
-      val funcWithBoundReferences = allAggregateExpressions(i).mode match {
+      val funcWithBoundReferences: AggregateFunction2 = allAggregateExpressions(i).mode match {
         case Partial | Complete if func.isInstanceOf[ImperativeAggregate] =>
           // We need to create BoundReferences if the function is not an
           // expression-based aggregate function (it does not support code-gen) and the mode of
@@ -94,24 +94,24 @@ abstract class AggregationIterator(
         case _ =>
           // We only need to set inputBufferOffset for aggregate functions with mode
           // PartialMerge and Final.
-          func match {
+          val updatedFunc = func match {
             case function: ImperativeAggregate =>
               function.withNewInputAggBufferOffset(inputBufferOffset)
-            case _ =>
+            case function => function
           }
           inputBufferOffset += func.aggBufferSchema.length
-          func
+          updatedFunc
       }
-      // Set mutableBufferOffset for this function. It is important that setting
-      // mutableBufferOffset happens after all potential bindReference operations
-      // because bindReference will create a new instance of the function.
-      funcWithBoundReferences match {
+      val funcWithUpdatedAggBufferOffset = funcWithBoundReferences match {
         case function: ImperativeAggregate =>
+          // Set mutableBufferOffset for this function. It is important that setting
+          // mutableBufferOffset happens after all potential bindReference operations
+          // because bindReference will create a new instance of the function.
           function.withNewMutableAggBufferOffset(mutableBufferOffset)
-        case _ =>
+        case function => function
       }
-      mutableBufferOffset += funcWithBoundReferences.aggBufferSchema.length
-      functions(i) = funcWithBoundReferences
+      mutableBufferOffset += funcWithUpdatedAggBufferOffset.aggBufferSchema.length
+      functions(i) = funcWithUpdatedAggBufferOffset
       i += 1
     }
     functions
@@ -320,7 +320,7 @@ abstract class AggregationIterator(
   // Initializing the function used to generate the output row.
   protected val generateOutput: (InternalRow, MutableRow) => InternalRow = {
     val rowToBeEvaluated = new JoinedRow
-    val safeOutputRow = new GenericMutableRow(resultExpressions.length)
+    val safeOutputRow = new SpecificMutableRow(resultExpressions.map(_.dataType))
     val mutableOutput = if (outputsUnsafeRows) {
       UnsafeProjection.create(resultExpressions.map(_.dataType).toArray).apply(safeOutputRow)
     } else {
@@ -358,7 +358,8 @@ abstract class AggregationIterator(
         val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferSchemata)()
         val aggregateResultSchema = nonCompleteAggregateAttributes ++ completeAggregateAttributes
         // TODO: Use unsafe row.
-        val aggregateResult = new GenericMutableRow(aggregateResultSchema.length)
+        val aggregateResult = new SpecificMutableRow(aggregateResultSchema.map(_.dataType))
+        expressionAggEvalProjection.target(aggregateResult)
         val resultProjection =
           newMutableProjection(
             resultExpressions, groupingKeyAttributes ++ aggregateResultSchema)()
@@ -366,7 +367,7 @@ abstract class AggregationIterator(
 
         (currentGroupingKey: InternalRow, currentBuffer: MutableRow) => {
           // Generate results for all expression-based aggregate functions.
-          expressionAggEvalProjection.target(aggregateResult)(currentBuffer)
+          expressionAggEvalProjection(currentBuffer)
           // Generate results for all imperative aggregate functions.
           var i = 0
           while (i < allImperativeAggregateFunctions.length) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index 7b3d072b2e06..c342940e6e75 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -24,8 +24,9 @@ import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression2
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.{UnaryNode, SparkPlan}
+import org.apache.spark.sql.execution.{UnsafeFixedWidthAggregationMap, UnaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
+import org.apache.spark.sql.types.StructType
 
 case class TungstenAggregate(
     requiredChildDistributionExpressions: Option[Seq[Expression]],
@@ -34,10 +35,18 @@ case class TungstenAggregate(
     nonCompleteAggregateAttributes: Seq[Attribute],
     completeAggregateExpressions: Seq[AggregateExpression2],
     completeAggregateAttributes: Seq[Attribute],
+    initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
     child: SparkPlan)
   extends UnaryNode {
 
+  private[this] val aggregateBufferAttributes = {
+    (nonCompleteAggregateExpressions ++ completeAggregateExpressions)
+      .flatMap(_.aggregateFunction.aggBufferAttributes)
+  }
+
+  require(TungstenAggregate.supportsAggregate(groupingExpressions, aggregateBufferAttributes))
+
   override private[sql] lazy val metrics = Map(
     "numInputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of input rows"),
     "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"))
@@ -82,6 +91,7 @@ case class TungstenAggregate(
         nonCompleteAggregateAttributes,
         completeAggregateExpressions,
         completeAggregateAttributes,
+        initialInputBufferOffset,
         resultExpressions,
         newMutableProjection,
         child.output,
@@ -138,3 +148,13 @@ case class TungstenAggregate(
     }
   }
 }
+
+object TungstenAggregate {
+  def supportsAggregate(
+    groupingExpressions: Seq[Expression],
+    aggregateBufferAttributes: Seq[Attribute]): Boolean = {
+    val aggregationBufferSchema = StructType.fromAttributes(aggregateBufferAttributes)
+    UnsafeFixedWidthAggregationMap.supportsAggregationBufferSchema(aggregationBufferSchema) &&
+      UnsafeProjection.canSupport(groupingExpressions)
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index 4bb95c9eb7f3..fe708a5f71f7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.execution.aggregate
 
+import scala.collection.mutable.ArrayBuffer
+
 import org.apache.spark.unsafe.KVIterator
 import org.apache.spark.{InternalAccumulator, Logging, SparkEnv, TaskContext}
 import org.apache.spark.sql.catalyst.expressions._
@@ -79,6 +81,7 @@ class TungstenAggregationIterator(
     nonCompleteAggregateAttributes: Seq[Attribute],
     completeAggregateExpressions: Seq[AggregateExpression2],
     completeAggregateAttributes: Seq[Attribute],
+    initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
     newMutableProjection: (Seq[Expression], Seq[Attribute]) => (() => MutableProjection),
     originalInputAttributes: Seq[Attribute],
@@ -134,19 +137,74 @@ class TungstenAggregationIterator(
       completeAggregateExpressions.map(_.mode).distinct.headOption
   }
 
-  // All aggregate functions. TungstenAggregationIterator only handles expression-based aggregate.
-  // If there is any functions that is an ImperativeAggregateFunction, we throw an
-  // IllegalStateException.
-  private[this] val allAggregateFunctions: Array[DeclarativeAggregate] = {
-    if (!allAggregateExpressions.forall(
-        _.aggregateFunction.isInstanceOf[DeclarativeAggregate])) {
-      throw new IllegalStateException(
-        "Only ExpressionAggregateFunctions should be passed in TungstenAggregationIterator.")
+  // Initialize all AggregateFunctions by binding references, if necessary,
+  // and setting inputBufferOffset and mutableBufferOffset.
+  private def initializeAllAggregateFunctions(
+      startingInputBufferOffset: Int): Array[AggregateFunction2] = {
+    var mutableBufferOffset = 0
+    var inputBufferOffset: Int = startingInputBufferOffset
+    val functions = new Array[AggregateFunction2](allAggregateExpressions.length)
+    var i = 0
+    while (i < allAggregateExpressions.length) {
+      val func = allAggregateExpressions(i).aggregateFunction
+      val aggregateExpressionIsNonComplete = i < nonCompleteAggregateExpressions.length
+      // We need to use this mode instead of func.mode in order to handle aggregation mode switching
+      // when switching to sort-based aggregation:
+      val mode = if (aggregateExpressionIsNonComplete) aggregationMode._1 else aggregationMode._2
+      val funcWithBoundReferences = mode match {
+        case Some(Partial) | Some(Complete) if func.isInstanceOf[ImperativeAggregate] =>
+          // We need to create BoundReferences if the function is not an
+          // expression-based aggregate function (it does not support code-gen) and the mode of
+          // this function is Partial or Complete because we will call eval of this
+          // function's children in the update method of this aggregate function.
+          // Those eval calls require BoundReferences to work.
+          BindReferences.bindReference(func, originalInputAttributes)
+        case _ =>
+          // We only need to set inputBufferOffset for aggregate functions with mode
+          // PartialMerge and Final.
+          val updatedFunc = func match {
+            case function: ImperativeAggregate =>
+              function.withNewInputAggBufferOffset(inputBufferOffset)
+            case function => function
+          }
+          inputBufferOffset += func.aggBufferSchema.length
+          updatedFunc
+      }
+      val funcWithUpdatedAggBufferOffset = funcWithBoundReferences match {
+        case function: ImperativeAggregate =>
+          // Set mutableBufferOffset for this function. It is important that setting
+          // mutableBufferOffset happens after all potential bindReference operations
+          // because bindReference will create a new instance of the function.
+          function.withNewMutableAggBufferOffset(mutableBufferOffset)
+        case function => function
+      }
+      mutableBufferOffset += funcWithUpdatedAggBufferOffset.aggBufferSchema.length
+      functions(i) = funcWithUpdatedAggBufferOffset
+      i += 1
     }
+    functions
+  }
 
-    allAggregateExpressions
-      .map(_.aggregateFunction.asInstanceOf[DeclarativeAggregate])
-      .toArray
+  private[this] var allAggregateFunctions: Array[AggregateFunction2] =
+    initializeAllAggregateFunctions(initialInputBufferOffset)
+
+  // Positions of those imperative aggregate functions in allAggregateFunctions.
+  // For example, say that we have func1, func2, func3, func4 in aggregateFunctions, and
+  // func2 and func3 are imperative aggregate functions. Then
+  // allImperativeAggregateFunctionPositions will be [1, 2]. Note that this does not need to be
+  // updated when falling back to sort-based aggregation because the positions of the aggregate
+  // functions do not change in that case.
+  private[this] val allImperativeAggregateFunctionPositions: Array[Int] = {
+    val positions = new ArrayBuffer[Int]()
+    var i = 0
+    while (i < allAggregateFunctions.length) {
+      allAggregateFunctions(i) match {
+        case agg: DeclarativeAggregate =>
+        case _ => positions += i
+      }
+      i += 1
+    }
+    positions.toArray
   }
 
   ///////////////////////////////////////////////////////////////////////////
@@ -155,25 +213,31 @@ class TungstenAggregationIterator(
   //         rows.
   ///////////////////////////////////////////////////////////////////////////
 
-  // The projection used to initialize buffer values.
-  private[this] val initialProjection: MutableProjection = {
-    val initExpressions = allAggregateFunctions.flatMap(_.initialValues)
+  // The projection used to initialize buffer values for all expression-based aggregates.
+  // Note that this projection does not need to be updated when switching to sort-based aggregation
+  // because the schema of empty aggregation buffers does not change in that case.
+  private[this] val expressionAggInitialProjection: MutableProjection = {
+    val initExpressions = allAggregateFunctions.flatMap {
+      case ae: DeclarativeAggregate => ae.initialValues
+      // For the positions corresponding to imperative aggregate functions, we'll use special
+      // no-op expressions which are ignored during projection code-generation.
+      case i: ImperativeAggregate => Seq.fill(i.aggBufferAttributes.length)(NoOp)
+    }
     newMutableProjection(initExpressions, Nil)()
   }
 
   // Creates a new aggregation buffer and initializes buffer values.
-  // This functions should be only called at most three times (when we create the hash map,
+  // This function should be only called at most three times (when we create the hash map,
   // when we switch to sort-based aggregation, and when we create the re-used buffer for
   // sort-based aggregation).
   private def createNewAggregationBuffer(): UnsafeRow = {
     val bufferSchema = allAggregateFunctions.flatMap(_.aggBufferAttributes)
-    val bufferRowSize: Int = bufferSchema.length
-
-    val genericMutableBuffer = new GenericMutableRow(bufferRowSize)
-    val unsafeProjection =
-      UnsafeProjection.create(bufferSchema.map(_.dataType))
-    val buffer = unsafeProjection.apply(genericMutableBuffer)
-    initialProjection.target(buffer)(EmptyRow)
+    val buffer: UnsafeRow = UnsafeProjection.create(bufferSchema.map(_.dataType))
+      .apply(new GenericMutableRow(bufferSchema.length))
+    // Initialize declarative aggregates' buffer values
+    expressionAggInitialProjection.target(buffer)(EmptyRow)
+    // Initialize imperative aggregates' buffer values
+    allAggregateFunctions.collect { case f: ImperativeAggregate => f }.foreach(_.initialize(buffer))
     buffer
   }
 
@@ -187,72 +251,124 @@ class TungstenAggregationIterator(
     aggregationMode match {
       // Partial-only
       case (Some(Partial), None) =>
-        val updateExpressions = allAggregateFunctions.flatMap(_.updateExpressions)
-        val updateProjection =
+        val updateExpressions = allAggregateFunctions.flatMap {
+          case ae: DeclarativeAggregate => ae.updateExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+        }
+        val imperativeAggregateFunctions: Array[ImperativeAggregate] =
+          allAggregateFunctions.collect { case func: ImperativeAggregate => func}
+        val expressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          updateProjection.target(currentBuffer)
-          updateProjection(joinedRow(currentBuffer, row))
+          expressionAggUpdateProjection.target(currentBuffer)
+          // Process all expression-based aggregate functions.
+          expressionAggUpdateProjection(joinedRow(currentBuffer, row))
+          // Process all imperative aggregate functions
+          var i = 0
+          while (i < imperativeAggregateFunctions.length) {
+            imperativeAggregateFunctions(i).update(currentBuffer, row)
+            i += 1
+          }
         }
 
       // PartialMerge-only or Final-only
       case (Some(PartialMerge), None) | (Some(Final), None) =>
-        val mergeExpressions = allAggregateFunctions.flatMap(_.mergeExpressions)
-        val mergeProjection =
+        val mergeExpressions = allAggregateFunctions.flatMap {
+          case ae: DeclarativeAggregate => ae.mergeExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+        }
+        val imperativeAggregateFunctions: Array[ImperativeAggregate] =
+          allAggregateFunctions.collect { case func: ImperativeAggregate => func}
+        // This projection is used to merge buffer values for all expression-based aggregates.
+        val expressionAggMergeProjection =
           newMutableProjection(mergeExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          mergeProjection.target(currentBuffer)
-          mergeProjection(joinedRow(currentBuffer, row))
+          // Process all expression-based aggregate functions.
+          expressionAggMergeProjection.target(currentBuffer)(joinedRow(currentBuffer, row))
+          // Process all imperative aggregate functions.
+          var i = 0
+          while (i < imperativeAggregateFunctions.length) {
+            imperativeAggregateFunctions(i).merge(currentBuffer, row)
+            i += 1
+          }
         }
 
       // Final-Complete
       case (Some(Final), Some(Complete)) =>
-        val nonCompleteAggregateFunctions: Array[DeclarativeAggregate] =
-          allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
-        val completeAggregateFunctions: Array[DeclarativeAggregate] =
+        val completeAggregateFunctions: Array[AggregateFunction2] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
+        val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          completeAggregateFunctions.collect { case func: ImperativeAggregate => func }
+        val nonCompleteAggregateFunctions: Array[AggregateFunction2] =
+          allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
+        val nonCompleteImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          nonCompleteAggregateFunctions.collect { case func: ImperativeAggregate => func }
 
         val completeOffsetExpressions =
           Seq.fill(completeAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
         val mergeExpressions =
-          nonCompleteAggregateFunctions.flatMap(_.mergeExpressions) ++ completeOffsetExpressions
+          nonCompleteAggregateFunctions.flatMap {
+            case ae: DeclarativeAggregate => ae.mergeExpressions
+            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          } ++ completeOffsetExpressions
         val finalMergeProjection =
           newMutableProjection(mergeExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         // We do not touch buffer values of aggregate functions with the Final mode.
         val finalOffsetExpressions =
           Seq.fill(nonCompleteAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
-        val updateExpressions =
-          finalOffsetExpressions ++ completeAggregateFunctions.flatMap(_.updateExpressions)
+        val updateExpressions = finalOffsetExpressions ++ completeAggregateFunctions.flatMap {
+          case ae: DeclarativeAggregate => ae.updateExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+        }
         val completeUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
           val input = joinedRow(currentBuffer, row)
-          // For all aggregate functions with mode Complete, update the given currentBuffer.
+          // For all aggregate functions with mode Complete, update buffers.
           completeUpdateProjection.target(currentBuffer)(input)
+          var i = 0
+          while (i < completeImperativeAggregateFunctions.length) {
+            completeImperativeAggregateFunctions(i).update(currentBuffer, row)
+            i += 1
+          }
 
           // For all aggregate functions with mode Final, merge buffer values in row to
           // currentBuffer.
           finalMergeProjection.target(currentBuffer)(input)
+          i = 0
+          while (i < nonCompleteImperativeAggregateFunctions.length) {
+            nonCompleteImperativeAggregateFunctions(i).merge(currentBuffer, row)
+            i += 1
+          }
         }
 
       // Complete-only
       case (None, Some(Complete)) =>
-        val completeAggregateFunctions: Array[DeclarativeAggregate] =
+        val completeAggregateFunctions: Array[AggregateFunction2] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
+        // All imperative aggregate functions with mode Complete.
+        val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          completeAggregateFunctions.collect { case func: ImperativeAggregate => func }
 
-        val updateExpressions =
-          completeAggregateFunctions.flatMap(_.updateExpressions)
-        val completeUpdateProjection =
+        val updateExpressions = completeAggregateFunctions.flatMap {
+          case ae: DeclarativeAggregate => ae.updateExpressions
+          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+        }
+        val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
 
         (currentBuffer: UnsafeRow, row: InternalRow) => {
-          completeUpdateProjection.target(currentBuffer)
-          // For all aggregate functions with mode Complete, update the given currentBuffer.
-          completeUpdateProjection(joinedRow(currentBuffer, row))
+          // For all aggregate functions with mode Complete, update buffers.
+          completeExpressionAggUpdateProjection.target(currentBuffer)(joinedRow(currentBuffer, row))
+          var i = 0
+          while (i < completeImperativeAggregateFunctions.length) {
+            completeImperativeAggregateFunctions(i).update(currentBuffer, row)
+            i += 1
+          }
         }
 
       // Grouping only.
@@ -288,17 +404,30 @@ class TungstenAggregationIterator(
         val joinedRow = new JoinedRow()
         val evalExpressions = allAggregateFunctions.map {
           case ae: DeclarativeAggregate => ae.evaluateExpression
-          // case agg: AggregateFunction2 => Literal.create(null, agg.dataType)
+          case agg: AggregateFunction2 => NoOp
         }
-        val expressionAggEvalProjection = UnsafeProjection.create(evalExpressions, bufferAttributes)
+        val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferAttributes)()
         // These are the attributes of the row produced by `expressionAggEvalProjection`
         val aggregateResultSchema = nonCompleteAggregateAttributes ++ completeAggregateAttributes
+        val aggregateResult = new SpecificMutableRow(aggregateResultSchema.map(_.dataType))
+        expressionAggEvalProjection.target(aggregateResult)
         val resultProjection =
           UnsafeProjection.create(resultExpressions, groupingAttributes ++ aggregateResultSchema)
 
+        val allImperativeAggregateFunctions: Array[ImperativeAggregate] =
+          allAggregateFunctions.collect { case func: ImperativeAggregate => func}
+
         (currentGroupingKey: UnsafeRow, currentBuffer: UnsafeRow) => {
           // Generate results for all expression-based aggregate functions.
-          val aggregateResult = expressionAggEvalProjection.apply(currentBuffer)
+          expressionAggEvalProjection(currentBuffer)
+          // Generate results for all imperative aggregate functions.
+          var i = 0
+          while (i < allImperativeAggregateFunctions.length) {
+            aggregateResult.update(
+              allImperativeAggregateFunctionPositions(i),
+              allImperativeAggregateFunctions(i).eval(currentBuffer))
+            i += 1
+          }
           resultProjection(joinedRow(currentGroupingKey, aggregateResult))
         }
 
@@ -481,10 +610,27 @@ class TungstenAggregationIterator(
       // When needsProcess is false, the format of input rows is groupingKey + aggregation buffer.
       // We need to project the aggregation buffer part from an input row.
       val buffer = createNewAggregationBuffer()
-      // The originalInputAttributes are using cloneBufferAttributes. So, we need to use
-      // allAggregateFunctions.flatMap(_.cloneBufferAttributes).
+      // In principle, we could use `allAggregateFunctions.flatMap(_.inputAggBufferAttributes)` to
+      // extract the aggregation buffer. In practice, however, we extract it positionally by relying
+      // on it being present at the end of the row. The reason for this relates to how the different
+      // aggregates handle input binding.
+      //
+      // ImperativeAggregate uses field numbers and field number offsets to manipulate its buffers,
+      // so its correctness does not rely on attribute bindings. When we fall back to sort-based
+      // aggregation, these field number offsets (mutableAggBufferOffset and inputAggBufferOffset)
+      // need to be updated and any internal state in the aggregate functions themselves must be
+      // reset, so we call withNewMutableAggBufferOffset and withNewInputAggBufferOffset to reset
+      // this state and update the offsets.
+      //
+      // The updated ImperativeAggregate will have different attribute ids for its
+      // aggBufferAttributes and inputAggBufferAttributes. This isn't a problem for the actual
+      // ImperativeAggregate evaluation, but it means that
+      // `allAggregateFunctions.flatMap(_.inputAggBufferAttributes)` will no longer match the
+      // attributes in `originalInputAttributes`, which is why we can't use those attributes here.
+      //
+      // For more details, see the discussion on PR #9038.
       val bufferExtractor = newMutableProjection(
-        allAggregateFunctions.flatMap(_.inputAggBufferAttributes),
+        originalInputAttributes.drop(initialInputBufferOffset),
         originalInputAttributes)()
       bufferExtractor.target(buffer)
 
@@ -511,8 +657,10 @@ class TungstenAggregationIterator(
     }
     aggregationMode = newAggregationMode
 
+    allAggregateFunctions = initializeAllAggregateFunctions(startingInputBufferOffset = 0)
+
     // Basically the value of the KVIterator returned by externalSorter
-    // will just aggregation buffer. At here, we use cloneBufferAttributes.
+    // will just aggregation buffer. At here, we use inputAggBufferAttributes.
     val newInputAttributes: Seq[Attribute] =
       allAggregateFunctions.flatMap(_.inputAggBufferAttributes)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
index fd02be1225f2..d2f56e0fc14a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
@@ -321,9 +321,17 @@ private[sql] class InputAggregationBuffer private[sql] (
  */
 private[sql] case class ScalaUDAF(
     children: Seq[Expression],
-    udaf: UserDefinedAggregateFunction)
+    udaf: UserDefinedAggregateFunction,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
   extends ImperativeAggregate with Logging {
 
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
   require(
     children.length == udaf.inputSchema.length,
     s"$udaf only accepts ${udaf.inputSchema.length} arguments, " +
@@ -341,6 +349,11 @@ private[sql] case class ScalaUDAF(
 
   override val aggBufferAttributes: Seq[AttributeReference] = aggBufferSchema.toAttributes
 
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
+
   private[this] lazy val childrenSchema: StructType = {
     val inputFields = children.zipWithIndex.map {
       case (child, index) =>
@@ -382,51 +395,33 @@ private[sql] case class ScalaUDAF(
   }
 
   // This buffer is only used at executor side.
-  private[this] var inputAggregateBuffer: InputAggregationBuffer = null
-
-  // This buffer is only used at executor side.
-  private[this] var mutableAggregateBuffer: MutableAggregationBufferImpl = null
+  private[this] lazy val inputAggregateBuffer: InputAggregationBuffer = {
+    new InputAggregationBuffer(
+      aggBufferSchema,
+      bufferValuesToCatalystConverters,
+      bufferValuesToScalaConverters,
+      inputAggBufferOffset,
+      null)
+  }
 
   // This buffer is only used at executor side.
-  private[this] var evalAggregateBuffer: InputAggregationBuffer = null
-
-  /**
-   * Sets the inputBufferOffset to newInputBufferOffset and then create a new instance of
-   * `inputAggregateBuffer` based on this new inputBufferOffset.
-   */
-  override def withNewInputAggBufferOffset(newInputBufferOffset: Int): Unit = {
-    super.withNewInputAggBufferOffset(newInputBufferOffset)
-    // inputBufferOffset has been updated.
-    inputAggregateBuffer =
-      new InputAggregationBuffer(
-        aggBufferSchema,
-        bufferValuesToCatalystConverters,
-        bufferValuesToScalaConverters,
-        inputAggBufferOffset,
-        null)
+  private[this] lazy val mutableAggregateBuffer: MutableAggregationBufferImpl = {
+    new MutableAggregationBufferImpl(
+      aggBufferSchema,
+      bufferValuesToCatalystConverters,
+      bufferValuesToScalaConverters,
+      mutableAggBufferOffset,
+      null)
   }
 
-  /**
-   * Sets the mutableBufferOffset to newMutableBufferOffset and then create a new instance of
-   * `mutableAggregateBuffer` and `evalAggregateBuffer` based on this new mutableBufferOffset.
-   */
-  override def withNewMutableAggBufferOffset(newMutableBufferOffset: Int): Unit = {
-    super.withNewMutableAggBufferOffset(newMutableBufferOffset)
-    // mutableBufferOffset has been updated.
-    mutableAggregateBuffer =
-      new MutableAggregationBufferImpl(
-        aggBufferSchema,
-        bufferValuesToCatalystConverters,
-        bufferValuesToScalaConverters,
-        mutableAggBufferOffset,
-        null)
-    evalAggregateBuffer =
-      new InputAggregationBuffer(
-        aggBufferSchema,
-        bufferValuesToCatalystConverters,
-        bufferValuesToScalaConverters,
-        mutableAggBufferOffset,
-        null)
+  // This buffer is only used at executor side.
+  private[this] lazy val evalAggregateBuffer: InputAggregationBuffer = {
+    new InputAggregationBuffer(
+      aggBufferSchema,
+      bufferValuesToCatalystConverters,
+      bufferValuesToScalaConverters,
+      mutableAggBufferOffset,
+      null)
   }
 
   override def initialize(buffer: MutableRow): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index cf6e7ed0d337..eaafd83158a1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -19,21 +19,12 @@ package org.apache.spark.sql.execution.aggregate
 
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
-import org.apache.spark.sql.execution.{UnsafeFixedWidthAggregationMap, SparkPlan}
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.execution.SparkPlan
 
 /**
  * Utility functions used by the query planner to convert our plan to new aggregation code path.
  */
 object Utils {
-  def supportsTungstenAggregate(
-      groupingExpressions: Seq[Expression],
-      aggregateBufferAttributes: Seq[Attribute]): Boolean = {
-    val aggregationBufferSchema = StructType.fromAttributes(aggregateBufferAttributes)
-
-    UnsafeFixedWidthAggregationMap.supportsAggregationBufferSchema(aggregationBufferSchema) &&
-      UnsafeProjection.canSupport(groupingExpressions)
-  }
 
   def planAggregateWithoutPartial(
       groupingExpressions: Seq[NamedExpression],
@@ -70,8 +61,7 @@ object Utils {
     // Check if we can use TungstenAggregate.
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
-      aggregateExpressions.forall(_.aggregateFunction.isInstanceOf[DeclarativeAggregate]) &&
-      supportsTungstenAggregate(
+      TungstenAggregate.supportsAggregate(
         groupingExpressions,
         aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
@@ -94,6 +84,7 @@ object Utils {
         nonCompleteAggregateAttributes = partialAggregateAttributes,
         completeAggregateExpressions = Nil,
         completeAggregateAttributes = Nil,
+        initialInputBufferOffset = 0,
         resultExpressions = partialResultExpressions,
         child = child)
     } else {
@@ -125,6 +116,7 @@ object Utils {
         nonCompleteAggregateAttributes = finalAggregateAttributes,
         completeAggregateExpressions = Nil,
         completeAggregateAttributes = Nil,
+        initialInputBufferOffset = groupingExpressions.length,
         resultExpressions = resultExpressions,
         child = partialAggregate)
     } else {
@@ -154,143 +146,150 @@ object Utils {
     val aggregateExpressions = functionsWithDistinct ++ functionsWithoutDistinct
     val usesTungstenAggregate =
       child.sqlContext.conf.unsafeEnabled &&
-        aggregateExpressions.forall(
-          _.aggregateFunction.isInstanceOf[DeclarativeAggregate]) &&
-        supportsTungstenAggregate(
+        TungstenAggregate.supportsAggregate(
           groupingExpressions,
           aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
-    // 1. Create an Aggregate Operator for partial aggregations.
-    val groupingAttributes = groupingExpressions.map(_.toAttribute)
-
-    // It is safe to call head at here since functionsWithDistinct has at least one
-    // AggregateExpression2.
-    val distinctColumnExpressions =
-      functionsWithDistinct.head.aggregateFunction.children
-    val namedDistinctColumnExpressions = distinctColumnExpressions.map {
-      case ne: NamedExpression => ne -> ne
-      case other =>
-        val withAlias = Alias(other, other.toString)()
-        other -> withAlias
+    // functionsWithDistinct is guaranteed to be non-empty. Even though it may contain more than one
+    // DISTINCT aggregate function, all of those functions will have the same column expression.
+    // For example, it would be valid for functionsWithDistinct to be
+    // [COUNT(DISTINCT foo), MAX(DISTINCT foo)], but [COUNT(DISTINCT bar), COUNT(DISTINCT foo)] is
+    // disallowed because those two distinct aggregates have different column expressions.
+    val distinctColumnExpression: Expression = {
+      val allDistinctColumnExpressions = functionsWithDistinct.head.aggregateFunction.children
+      assert(allDistinctColumnExpressions.length == 1)
+      allDistinctColumnExpressions.head
+    }
+    val namedDistinctColumnExpression: NamedExpression = distinctColumnExpression match {
+      case ne: NamedExpression => ne
+      case other => Alias(other, other.toString)()
     }
-    val distinctColumnExpressionMap = namedDistinctColumnExpressions.toMap
-    val distinctColumnAttributes = namedDistinctColumnExpressions.map(_._2.toAttribute)
+    val distinctColumnAttribute: Attribute = namedDistinctColumnExpression.toAttribute
+    val groupingAttributes = groupingExpressions.map(_.toAttribute)
 
-    val partialAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Partial))
-    val partialAggregateAttributes =
-      partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
-    val partialAggregateGroupingExpressions =
-      groupingExpressions ++ namedDistinctColumnExpressions.map(_._2)
-    val partialAggregateResult =
+    // 1. Create an Aggregate Operator for partial aggregations.
+    val partialAggregate: SparkPlan = {
+      val partialAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Partial))
+      val partialAggregateAttributes =
+        partialAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
+      // We will group by the original grouping expression, plus an additional expression for the
+      // DISTINCT column. For example, for AVG(DISTINCT value) GROUP BY key, the grouping
+      // expressions will be [key, value].
+      val partialAggregateGroupingExpressions = groupingExpressions :+ namedDistinctColumnExpression
+      val partialAggregateResult =
         groupingAttributes ++
-        distinctColumnAttributes ++
-        partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
-    val partialAggregate = if (usesTungstenAggregate) {
-      TungstenAggregate(
-        requiredChildDistributionExpressions = None,
-        // The grouping expressions are original groupingExpressions and
-        // distinct columns. For example, for avg(distinct value) ... group by key
-        // the grouping expressions of this Aggregate Operator will be [key, value].
-        groupingExpressions = partialAggregateGroupingExpressions,
-        nonCompleteAggregateExpressions = partialAggregateExpressions,
-        nonCompleteAggregateAttributes = partialAggregateAttributes,
-        completeAggregateExpressions = Nil,
-        completeAggregateAttributes = Nil,
-        resultExpressions = partialAggregateResult,
-        child = child)
-    } else {
-      SortBasedAggregate(
-        requiredChildDistributionExpressions = None,
-        groupingExpressions = partialAggregateGroupingExpressions,
-        nonCompleteAggregateExpressions = partialAggregateExpressions,
-        nonCompleteAggregateAttributes = partialAggregateAttributes,
-        completeAggregateExpressions = Nil,
-        completeAggregateAttributes = Nil,
-        initialInputBufferOffset = 0,
-        resultExpressions = partialAggregateResult,
-        child = child)
+          Seq(distinctColumnAttribute) ++
+          partialAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
+      if (usesTungstenAggregate) {
+        TungstenAggregate(
+          requiredChildDistributionExpressions = None,
+          groupingExpressions = partialAggregateGroupingExpressions,
+          nonCompleteAggregateExpressions = partialAggregateExpressions,
+          nonCompleteAggregateAttributes = partialAggregateAttributes,
+          completeAggregateExpressions = Nil,
+          completeAggregateAttributes = Nil,
+          initialInputBufferOffset = 0,
+          resultExpressions = partialAggregateResult,
+          child = child)
+      } else {
+        SortBasedAggregate(
+          requiredChildDistributionExpressions = None,
+          groupingExpressions = partialAggregateGroupingExpressions,
+          nonCompleteAggregateExpressions = partialAggregateExpressions,
+          nonCompleteAggregateAttributes = partialAggregateAttributes,
+          completeAggregateExpressions = Nil,
+          completeAggregateAttributes = Nil,
+          initialInputBufferOffset = 0,
+          resultExpressions = partialAggregateResult,
+          child = child)
+      }
     }
 
     // 2. Create an Aggregate Operator for partial merge aggregations.
-    val partialMergeAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = PartialMerge))
-    val partialMergeAggregateAttributes =
-      partialMergeAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
-    val partialMergeAggregateResult =
+    val partialMergeAggregate: SparkPlan = {
+      val partialMergeAggregateExpressions =
+        functionsWithoutDistinct.map(_.copy(mode = PartialMerge))
+      val partialMergeAggregateAttributes =
+        partialMergeAggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes)
+      val partialMergeAggregateResult =
         groupingAttributes ++
-        distinctColumnAttributes ++
-        partialMergeAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
-    val partialMergeAggregate = if (usesTungstenAggregate) {
-      TungstenAggregate(
-        requiredChildDistributionExpressions = Some(groupingAttributes),
-        groupingExpressions = groupingAttributes ++ distinctColumnAttributes,
-        nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
-        nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
-        completeAggregateExpressions = Nil,
-        completeAggregateAttributes = Nil,
-        resultExpressions = partialMergeAggregateResult,
-        child = partialAggregate)
-    } else {
-      SortBasedAggregate(
-        requiredChildDistributionExpressions = Some(groupingAttributes),
-        groupingExpressions = groupingAttributes ++ distinctColumnAttributes,
-        nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
-        nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
-        completeAggregateExpressions = Nil,
-        completeAggregateAttributes = Nil,
-        initialInputBufferOffset = (groupingAttributes ++ distinctColumnAttributes).length,
-        resultExpressions = partialMergeAggregateResult,
-        child = partialAggregate)
+          Seq(distinctColumnAttribute) ++
+          partialMergeAggregateExpressions.flatMap(_.aggregateFunction.inputAggBufferAttributes)
+      if (usesTungstenAggregate) {
+        TungstenAggregate(
+          requiredChildDistributionExpressions = Some(groupingAttributes),
+          groupingExpressions = groupingAttributes :+ distinctColumnAttribute,
+          nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
+          nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
+          completeAggregateExpressions = Nil,
+          completeAggregateAttributes = Nil,
+          initialInputBufferOffset = (groupingAttributes :+ distinctColumnAttribute).length,
+          resultExpressions = partialMergeAggregateResult,
+          child = partialAggregate)
+      } else {
+        SortBasedAggregate(
+          requiredChildDistributionExpressions = Some(groupingAttributes),
+          groupingExpressions = groupingAttributes :+ distinctColumnAttribute,
+          nonCompleteAggregateExpressions = partialMergeAggregateExpressions,
+          nonCompleteAggregateAttributes = partialMergeAggregateAttributes,
+          completeAggregateExpressions = Nil,
+          completeAggregateAttributes = Nil,
+          initialInputBufferOffset = (groupingAttributes :+ distinctColumnAttribute).length,
+          resultExpressions = partialMergeAggregateResult,
+          child = partialAggregate)
+      }
     }
 
-    // 3. Create an Aggregate Operator for partial merge aggregations.
-    val finalAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Final))
-    // The attributes of the final aggregation buffer, which is presented as input to the result
-    // projection:
-    val finalAggregateAttributes = finalAggregateExpressions.map {
-      expr => aggregateFunctionToAttribute(expr.aggregateFunction, expr.isDistinct)
-    }
+    // 3. Create an Aggregate Operator for the final aggregation.
+    val finalAndCompleteAggregate: SparkPlan = {
+      val finalAggregateExpressions = functionsWithoutDistinct.map(_.copy(mode = Final))
+      // The attributes of the final aggregation buffer, which is presented as input to the result
+      // projection:
+      val finalAggregateAttributes = finalAggregateExpressions.map {
+        expr => aggregateFunctionToAttribute(expr.aggregateFunction, expr.isDistinct)
+      }
 
-    val (completeAggregateExpressions, completeAggregateAttributes) = functionsWithDistinct.map {
-      // Children of an AggregateFunction with DISTINCT keyword has already
-      // been evaluated. At here, we need to replace original children
-      // to AttributeReferences.
-      case agg @ AggregateExpression2(aggregateFunction, mode, true) =>
-        val rewrittenAggregateFunction = aggregateFunction.transformDown {
-          case expr if distinctColumnExpressionMap.contains(expr) =>
-            distinctColumnExpressionMap(expr).toAttribute
-        }.asInstanceOf[AggregateFunction2]
-        // We rewrite the aggregate function to a non-distinct aggregation because
-        // its input will have distinct arguments.
-        // We just keep the isDistinct setting to true, so when users look at the query plan,
-        // they still can see distinct aggregations.
-        val rewrittenAggregateExpression =
-          AggregateExpression2(rewrittenAggregateFunction, Complete, true)
+      val (completeAggregateExpressions, completeAggregateAttributes) = functionsWithDistinct.map {
+        // Children of an AggregateFunction with DISTINCT keyword has already
+        // been evaluated. At here, we need to replace original children
+        // to AttributeReferences.
+        case agg @ AggregateExpression2(aggregateFunction, mode, true) =>
+          val rewrittenAggregateFunction = aggregateFunction.transformDown {
+            case expr if expr == distinctColumnExpression => distinctColumnAttribute
+          }.asInstanceOf[AggregateFunction2]
+          // We rewrite the aggregate function to a non-distinct aggregation because
+          // its input will have distinct arguments.
+          // We just keep the isDistinct setting to true, so when users look at the query plan,
+          // they still can see distinct aggregations.
+          val rewrittenAggregateExpression =
+            AggregateExpression2(rewrittenAggregateFunction, Complete, isDistinct = true)
 
-        val aggregateFunctionAttribute = aggregateFunctionToAttribute(agg.aggregateFunction, true)
-        (rewrittenAggregateExpression, aggregateFunctionAttribute)
-    }.unzip
-
-    val finalAndCompleteAggregate = if (usesTungstenAggregate) {
-      TungstenAggregate(
-        requiredChildDistributionExpressions = Some(groupingAttributes),
-        groupingExpressions = groupingAttributes,
-        nonCompleteAggregateExpressions = finalAggregateExpressions,
-        nonCompleteAggregateAttributes = finalAggregateAttributes,
-        completeAggregateExpressions = completeAggregateExpressions,
-        completeAggregateAttributes = completeAggregateAttributes,
-        resultExpressions = resultExpressions,
-        child = partialMergeAggregate)
-    } else {
-      SortBasedAggregate(
-        requiredChildDistributionExpressions = Some(groupingAttributes),
-        groupingExpressions = groupingAttributes,
-        nonCompleteAggregateExpressions = finalAggregateExpressions,
-        nonCompleteAggregateAttributes = finalAggregateAttributes,
-        completeAggregateExpressions = completeAggregateExpressions,
-        completeAggregateAttributes = completeAggregateAttributes,
-        initialInputBufferOffset = (groupingAttributes ++ distinctColumnAttributes).length,
-        resultExpressions = resultExpressions,
-        child = partialMergeAggregate)
+          val aggregateFunctionAttribute = aggregateFunctionToAttribute(agg.aggregateFunction, true)
+          (rewrittenAggregateExpression, aggregateFunctionAttribute)
+      }.unzip
+      if (usesTungstenAggregate) {
+        TungstenAggregate(
+          requiredChildDistributionExpressions = Some(groupingAttributes),
+          groupingExpressions = groupingAttributes,
+          nonCompleteAggregateExpressions = finalAggregateExpressions,
+          nonCompleteAggregateAttributes = finalAggregateAttributes,
+          completeAggregateExpressions = completeAggregateExpressions,
+          completeAggregateAttributes = completeAggregateAttributes,
+          initialInputBufferOffset = (groupingAttributes :+ distinctColumnAttribute).length,
+          resultExpressions = resultExpressions,
+          child = partialMergeAggregate)
+      } else {
+        SortBasedAggregate(
+          requiredChildDistributionExpressions = Some(groupingAttributes),
+          groupingExpressions = groupingAttributes,
+          nonCompleteAggregateExpressions = finalAggregateExpressions,
+          nonCompleteAggregateAttributes = finalAggregateAttributes,
+          completeAggregateExpressions = completeAggregateExpressions,
+          completeAggregateAttributes = completeAggregateAttributes,
+          initialInputBufferOffset = (groupingAttributes :+ distinctColumnAttribute).length,
+          resultExpressions = resultExpressions,
+          child = partialMergeAggregate)
+      }
     }
 
     finalAndCompleteAggregate :: Nil
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
index ed974b3a53d4..0cc4988ff681 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
@@ -39,7 +39,7 @@ class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLConte
       }
       val dummyAccum = SQLMetrics.createLongMetric(sparkContext, "dummy")
       iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty, Seq.empty, Seq.empty,
-        Seq.empty, newMutableProjection, Seq.empty, None, dummyAccum, dummyAccum)
+        0, Seq.empty, newMutableProjection, Seq.empty, None, dummyAccum, dummyAccum)
       val numPages = iter.getHashMap.getNumDataPages
       assert(numPages === 1)
     } finally {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index 18bbdb990814..a2ebf6552fd0 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -553,10 +553,16 @@ private[hive] case class HiveGenericUDTF(
 private[hive] case class HiveUDAFFunction(
     funcWrapper: HiveFunctionWrapper,
     children: Seq[Expression],
-    isUDAFBridgeRequired: Boolean = false)
+    isUDAFBridgeRequired: Boolean = false,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
   extends ImperativeAggregate with HiveInspectors {
 
-  def this() = this(null, null)
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
 
   @transient
   private lazy val resolver =
@@ -614,7 +620,11 @@ private[hive] case class HiveUDAFFunction(
     buffer = function.getNewAggregationBuffer
   }
 
-  override def aggBufferAttributes: Seq[AttributeReference] = Nil
+  override val aggBufferAttributes: Seq[AttributeReference] = Nil
+
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] = Nil
 
   // We rely on Hive to check the input data types, so use `AnyDataType` here to bypass our
   // catalyst type checking framework.

From 9808052b5adfed7dafd6c1b3971b998e45b2799a Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Wed, 14 Oct 2015 20:56:08 -0700
Subject: [PATCH 244/896] [SPARK-11076] [SQL] Add decimal support for floor and
 ceil

Actually all of the `UnaryMathExpression` doens't support the Decimal, will create follow ups for supporing it. This is the first PR which will be good to review the approach I am taking.

Author: Cheng Hao <hao.cheng@intel.com>

Closes #9086 from chenghao-intel/ceiling.
---
 .../expressions/mathExpressions.scala         | 48 +++++++++++++++----
 .../org/apache/spark/sql/types/Decimal.scala  | 32 +++++++++++--
 .../expressions/LiteralGenerator.scala        | 14 +++++-
 .../expressions/MathFunctionsSuite.scala      | 10 ++++
 4 files changed, 91 insertions(+), 13 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
index a8164e9e29ec..28f616fbb9ca 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala
@@ -55,7 +55,7 @@ abstract class LeafMathExpression(c: Double, name: String)
 abstract class UnaryMathExpression(val f: Double => Double, name: String)
   extends UnaryExpression with Serializable with ImplicitCastInputTypes {
 
-  override def inputTypes: Seq[DataType] = Seq(DoubleType)
+  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType)
   override def dataType: DataType = DoubleType
   override def nullable: Boolean = true
   override def toString: String = s"$name($child)"
@@ -153,13 +153,28 @@ case class Atan(child: Expression) extends UnaryMathExpression(math.atan, "ATAN"
 case class Cbrt(child: Expression) extends UnaryMathExpression(math.cbrt, "CBRT")
 
 case class Ceil(child: Expression) extends UnaryMathExpression(math.ceil, "CEIL") {
-  override def dataType: DataType = LongType
-  protected override def nullSafeEval(input: Any): Any = {
-    f(input.asInstanceOf[Double]).toLong
+  override def dataType: DataType = child.dataType match {
+    case dt @ DecimalType.Fixed(_, 0) => dt
+    case DecimalType.Fixed(precision, scale) =>
+      DecimalType.bounded(precision - scale + 1, 0)
+    case _ => LongType
+  }
+
+  override def inputTypes: Seq[AbstractDataType] =
+    Seq(TypeCollection(DoubleType, DecimalType))
+
+  protected override def nullSafeEval(input: Any): Any = child.dataType match {
+    case DoubleType => f(input.asInstanceOf[Double]).toLong
+    case DecimalType.Fixed(precision, scale) => input.asInstanceOf[Decimal].ceil
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+    child.dataType match {
+      case DecimalType.Fixed(_, 0) => defineCodeGen(ctx, ev, c => s"$c")
+      case DecimalType.Fixed(precision, scale) =>
+        defineCodeGen(ctx, ev, c => s"$c.ceil()")
+      case _ => defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+    }
   }
 }
 
@@ -205,13 +220,28 @@ case class Exp(child: Expression) extends UnaryMathExpression(math.exp, "EXP")
 case class Expm1(child: Expression) extends UnaryMathExpression(math.expm1, "EXPM1")
 
 case class Floor(child: Expression) extends UnaryMathExpression(math.floor, "FLOOR") {
-  override def dataType: DataType = LongType
-  protected override def nullSafeEval(input: Any): Any = {
-    f(input.asInstanceOf[Double]).toLong
+  override def dataType: DataType = child.dataType match {
+    case dt @ DecimalType.Fixed(_, 0) => dt
+    case DecimalType.Fixed(precision, scale) =>
+      DecimalType.bounded(precision - scale + 1, 0)
+    case _ => LongType
+  }
+
+  override def inputTypes: Seq[AbstractDataType] =
+    Seq(TypeCollection(DoubleType, DecimalType))
+
+  protected override def nullSafeEval(input: Any): Any = child.dataType match {
+    case DoubleType => f(input.asInstanceOf[Double]).toLong
+    case DecimalType.Fixed(precision, scale) => input.asInstanceOf[Decimal].floor
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+    child.dataType match {
+      case DecimalType.Fixed(_, 0) => defineCodeGen(ctx, ev, c => s"$c")
+      case DecimalType.Fixed(precision, scale) =>
+        defineCodeGen(ctx, ev, c => s"$c.floor()")
+      case _ => defineCodeGen(ctx, ev, c => s"(long)(java.lang.Math.${funcName}($c))")
+    }
   }
 }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
index c11dab35cdf6..c7a1a2e7469e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/Decimal.scala
@@ -107,7 +107,7 @@ final class Decimal extends Ordered[Decimal] with Serializable {
    * Set this Decimal to the given BigDecimal value, with a given precision and scale.
    */
   def set(decimal: BigDecimal, precision: Int, scale: Int): Decimal = {
-    this.decimalVal = decimal.setScale(scale, ROUNDING_MODE)
+    this.decimalVal = decimal.setScale(scale, ROUND_HALF_UP)
     require(
       decimalVal.precision <= precision,
       s"Decimal precision ${decimalVal.precision} exceeds max precision $precision")
@@ -198,6 +198,16 @@ final class Decimal extends Ordered[Decimal] with Serializable {
    * @return true if successful, false if overflow would occur
    */
   def changePrecision(precision: Int, scale: Int): Boolean = {
+    changePrecision(precision, scale, ROUND_HALF_UP)
+  }
+
+  /**
+   * Update precision and scale while keeping our value the same, and return true if successful.
+   *
+   * @return true if successful, false if overflow would occur
+   */
+  private[sql] def changePrecision(precision: Int, scale: Int,
+                      roundMode: BigDecimal.RoundingMode.Value): Boolean = {
     // fast path for UnsafeProjection
     if (precision == this.precision && scale == this.scale) {
       return true
@@ -231,7 +241,7 @@ final class Decimal extends Ordered[Decimal] with Serializable {
     if (decimalVal.ne(null)) {
       // We get here if either we started with a BigDecimal, or we switched to one because we would
       // have overflowed our Long; in either case we must rescale decimalVal to the new scale.
-      val newVal = decimalVal.setScale(scale, ROUNDING_MODE)
+      val newVal = decimalVal.setScale(scale, roundMode)
       if (newVal.precision > precision) {
         return false
       }
@@ -309,10 +319,26 @@ final class Decimal extends Ordered[Decimal] with Serializable {
   }
 
   def abs: Decimal = if (this.compare(Decimal.ZERO) < 0) this.unary_- else this
+
+  def floor: Decimal = if (scale == 0) this else {
+    val value = this.clone()
+    value.changePrecision(
+      DecimalType.bounded(precision - scale + 1, 0).precision, 0, ROUND_FLOOR)
+    value
+  }
+
+  def ceil: Decimal = if (scale == 0) this else {
+    val value = this.clone()
+    value.changePrecision(
+      DecimalType.bounded(precision - scale + 1, 0).precision, 0, ROUND_CEILING)
+    value
+  }
 }
 
 object Decimal {
-  private val ROUNDING_MODE = BigDecimal.RoundingMode.HALF_UP
+  val ROUND_HALF_UP = BigDecimal.RoundingMode.HALF_UP
+  val ROUND_CEILING = BigDecimal.RoundingMode.CEILING
+  val ROUND_FLOOR = BigDecimal.RoundingMode.FLOOR
 
   /** Maximum number of decimal digits a Long can represent */
   val MAX_LONG_DIGITS = 18
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralGenerator.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralGenerator.scala
index ee6d25157fc0..d9c91415e249 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralGenerator.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralGenerator.scala
@@ -78,7 +78,18 @@ object LiteralGenerator {
         Double.NaN, Double.PositiveInfinity, Double.NegativeInfinity)
     } yield Literal.create(f, DoubleType)
 
-  // TODO: decimal type
+  // TODO cache the generated data
+  def decimalLiteralGen(precision: Int, scale: Int): Gen[Literal] = {
+    assert(scale >= 0)
+    assert(precision >= scale)
+    Arbitrary.arbBigInt.arbitrary.map { s =>
+      val a = (s % BigInt(10).pow(precision - scale)).toString()
+      val b = (s % BigInt(10).pow(scale)).abs.toString()
+      Literal.create(
+        Decimal(BigDecimal(s"$a.$b"), precision, scale),
+        DecimalType(precision, scale))
+    }
+  }
 
   lazy val stringLiteralGen: Gen[Literal] =
     for { s <- Arbitrary.arbString.arbitrary } yield Literal.create(s, StringType)
@@ -122,6 +133,7 @@ object LiteralGenerator {
       case StringType => stringLiteralGen
       case BinaryType => binaryLiteralGen
       case CalendarIntervalType => calendarIntervalLiterGen
+      case DecimalType.Fixed(precision, scale) => decimalLiteralGen(precision, scale)
       case dt => throw new IllegalArgumentException(s"not supported type $dt")
     }
   }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
index 1b2a9163a3d0..88ed9fdd6465 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/MathFunctionsSuite.scala
@@ -246,11 +246,21 @@ class MathFunctionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   test("ceil") {
     testUnary(Ceil, (d: Double) => math.ceil(d).toLong)
     checkConsistencyBetweenInterpretedAndCodegen(Ceil, DoubleType)
+
+    testUnary(Ceil, (d: Decimal) => d.ceil, (-20 to 20).map(x => Decimal(x * 0.1)))
+    checkConsistencyBetweenInterpretedAndCodegen(Ceil, DecimalType(25, 3))
+    checkConsistencyBetweenInterpretedAndCodegen(Ceil, DecimalType(25, 0))
+    checkConsistencyBetweenInterpretedAndCodegen(Ceil, DecimalType(5, 0))
   }
 
   test("floor") {
     testUnary(Floor, (d: Double) => math.floor(d).toLong)
     checkConsistencyBetweenInterpretedAndCodegen(Floor, DoubleType)
+
+    testUnary(Floor, (d: Decimal) => d.floor, (-20 to 20).map(x => Decimal(x * 0.1)))
+    checkConsistencyBetweenInterpretedAndCodegen(Floor, DecimalType(25, 3))
+    checkConsistencyBetweenInterpretedAndCodegen(Floor, DecimalType(25, 0))
+    checkConsistencyBetweenInterpretedAndCodegen(Floor, DecimalType(5, 0))
   }
 
   test("factorial") {

From 0f62c2282bb30cb4fb6eea9d28b198d557a79b22 Mon Sep 17 00:00:00 2001
From: Adam Lewandowski <alewandowski@ipcoop.com>
Date: Thu, 15 Oct 2015 09:45:54 -0700
Subject: [PATCH 245/896] [SPARK-11093] [CORE]
 ChildFirstURLClassLoader#getResources should return all found resources, not
 just those in the child classloader

Author: Adam Lewandowski <alewandowski@ipcoop.com>

Closes #9106 from alewando/childFirstFix.
---
 .../spark/util/MutableURLClassLoader.scala    | 13 +++---
 .../util/MutableURLClassLoaderSuite.scala     | 40 ++++++++++++++++++-
 2 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/MutableURLClassLoader.scala b/core/src/main/scala/org/apache/spark/util/MutableURLClassLoader.scala
index a1c33212cdb2..945217203be7 100644
--- a/core/src/main/scala/org/apache/spark/util/MutableURLClassLoader.scala
+++ b/core/src/main/scala/org/apache/spark/util/MutableURLClassLoader.scala
@@ -21,6 +21,8 @@ import java.net.{URLClassLoader, URL}
 import java.util.Enumeration
 import java.util.concurrent.ConcurrentHashMap
 
+import scala.collection.JavaConverters._
+
 /**
  * URL class loader that exposes the `addURL` and `getURLs` methods in URLClassLoader.
  */
@@ -82,14 +84,9 @@ private[spark] class ChildFirstURLClassLoader(urls: Array[URL], parent: ClassLoa
   }
 
   override def getResources(name: String): Enumeration[URL] = {
-    val urls = super.findResources(name)
-    val res =
-      if (urls != null && urls.hasMoreElements()) {
-        urls
-      } else {
-        parentClassLoader.getResources(name)
-      }
-    res
+    val childUrls = super.findResources(name).asScala
+    val parentUrls = parentClassLoader.getResources(name).asScala
+    (childUrls ++ parentUrls).asJavaEnumeration
   }
 
   override def addURL(url: URL) {
diff --git a/core/src/test/scala/org/apache/spark/util/MutableURLClassLoaderSuite.scala b/core/src/test/scala/org/apache/spark/util/MutableURLClassLoaderSuite.scala
index d3d464e84ffd..8b53d4f14a6a 100644
--- a/core/src/test/scala/org/apache/spark/util/MutableURLClassLoaderSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/MutableURLClassLoaderSuite.scala
@@ -19,9 +19,14 @@ package org.apache.spark.util
 
 import java.net.URLClassLoader
 
+import scala.collection.JavaConverters._
+
+import org.scalatest.Matchers
+import org.scalatest.Matchers._
+
 import org.apache.spark.{SparkContext, SparkException, SparkFunSuite, TestUtils}
 
-class MutableURLClassLoaderSuite extends SparkFunSuite {
+class MutableURLClassLoaderSuite extends SparkFunSuite with Matchers {
 
   val urls2 = List(TestUtils.createJarWithClasses(
       classNames = Seq("FakeClass1", "FakeClass2", "FakeClass3"),
@@ -32,6 +37,12 @@ class MutableURLClassLoaderSuite extends SparkFunSuite {
       toStringValue = "1",
       classpathUrls = urls2)).toArray
 
+  val fileUrlsChild = List(TestUtils.createJarWithFiles(Map(
+    "resource1" -> "resource1Contents-child",
+    "resource2" -> "resource2Contents"))).toArray
+  val fileUrlsParent = List(TestUtils.createJarWithFiles(Map(
+    "resource1" -> "resource1Contents-parent"))).toArray
+
   test("child first") {
     val parentLoader = new URLClassLoader(urls2, null)
     val classLoader = new ChildFirstURLClassLoader(urls, parentLoader)
@@ -68,6 +79,33 @@ class MutableURLClassLoaderSuite extends SparkFunSuite {
     }
   }
 
+  test("default JDK classloader get resources") {
+    val parentLoader = new URLClassLoader(fileUrlsParent, null)
+    val classLoader = new URLClassLoader(fileUrlsChild, parentLoader)
+    assert(classLoader.getResources("resource1").asScala.size === 2)
+    assert(classLoader.getResources("resource2").asScala.size === 1)
+  }
+
+  test("parent first get resources") {
+    val parentLoader = new URLClassLoader(fileUrlsParent, null)
+    val classLoader = new MutableURLClassLoader(fileUrlsChild, parentLoader)
+    assert(classLoader.getResources("resource1").asScala.size === 2)
+    assert(classLoader.getResources("resource2").asScala.size === 1)
+  }
+
+  test("child first get resources") {
+    val parentLoader = new URLClassLoader(fileUrlsParent, null)
+    val classLoader = new ChildFirstURLClassLoader(fileUrlsChild, parentLoader)
+
+    val res1 = classLoader.getResources("resource1").asScala.toList
+    assert(res1.size === 2)
+    assert(classLoader.getResources("resource2").asScala.size === 1)
+
+    res1.map(scala.io.Source.fromURL(_).mkString) should contain inOrderOnly
+      ("resource1Contents-child", "resource1Contents-parent")
+  }
+
+
   test("driver sets context class loader in local mode") {
     // Test the case where the driver program sets a context classloader and then runs a job
     // in local mode. This is what happens when ./spark-submit is called with "local" as the

From aec4400beffc569c13cceea2d0c481dfa3f34175 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Thu, 15 Oct 2015 09:49:19 -0700
Subject: [PATCH 246/896] =?UTF-8?q?[SPARK-11099]=20[SPARK=20SHELL]=20[SPAR?=
 =?UTF-8?q?K=20SUBMIT]=20Default=20conf=20property=20file=20i=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Please help review it. Thanks

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9114 from zjffdu/SPARK-11099.
---
 .../launcher/AbstractCommandBuilder.java      | 14 ++++------
 .../SparkSubmitCommandBuilderSuite.java       | 28 +++++++++++++------
 .../src/test/resources/spark-defaults.conf    | 21 ++++++++++++++
 3 files changed, 45 insertions(+), 18 deletions(-)
 create mode 100644 launcher/src/test/resources/spark-defaults.conf

diff --git a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
index cf3729b7febc..3ee6bd92e47f 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
@@ -272,15 +272,11 @@ void setPropertiesFile(String path) {
 
   Map<String, String> getEffectiveConfig() throws IOException {
     if (effectiveConfig == null) {
-      if (propertiesFile == null) {
-        effectiveConfig = conf;
-      } else {
-        effectiveConfig = new HashMap<>(conf);
-        Properties p = loadPropertiesFile();
-        for (String key : p.stringPropertyNames()) {
-          if (!effectiveConfig.containsKey(key)) {
-            effectiveConfig.put(key, p.getProperty(key));
-          }
+      effectiveConfig = new HashMap<>(conf);
+      Properties p = loadPropertiesFile();
+      for (String key : p.stringPropertyNames()) {
+        if (!effectiveConfig.containsKey(key)) {
+          effectiveConfig.put(key, p.getProperty(key));
         }
       }
     }
diff --git a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
index d5397b068504..6aad47adbcc8 100644
--- a/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
+++ b/launcher/src/test/java/org/apache/spark/launcher/SparkSubmitCommandBuilderSuite.java
@@ -48,12 +48,14 @@ public static void cleanUp() throws Exception {
 
   @Test
   public void testDriverCmdBuilder() throws Exception {
-    testCmdBuilder(true);
+    testCmdBuilder(true, true);
+    testCmdBuilder(true, false);
   }
 
   @Test
   public void testClusterCmdBuilder() throws Exception {
-    testCmdBuilder(false);
+    testCmdBuilder(false, true);
+    testCmdBuilder(false, false);
   }
 
   @Test
@@ -149,7 +151,7 @@ public void testPySparkFallback() throws Exception {
     assertEquals("arg1", cmd.get(cmd.size() - 1));
   }
 
-  private void testCmdBuilder(boolean isDriver) throws Exception {
+  private void testCmdBuilder(boolean isDriver, boolean useDefaultPropertyFile) throws Exception {
     String deployMode = isDriver ? "client" : "cluster";
 
     SparkSubmitCommandBuilder launcher =
@@ -161,14 +163,20 @@ private void testCmdBuilder(boolean isDriver) throws Exception {
     launcher.appResource = "/foo";
     launcher.appName = "MyApp";
     launcher.mainClass = "my.Class";
-    launcher.setPropertiesFile(dummyPropsFile.getAbsolutePath());
     launcher.appArgs.add("foo");
     launcher.appArgs.add("bar");
-    launcher.conf.put(SparkLauncher.DRIVER_MEMORY, "1g");
-    launcher.conf.put(SparkLauncher.DRIVER_EXTRA_CLASSPATH, "/driver");
-    launcher.conf.put(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS, "-Ddriver -XX:MaxPermSize=256m");
-    launcher.conf.put(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH, "/native");
     launcher.conf.put("spark.foo", "foo");
+    // either set the property through "--conf" or through default property file
+    if (!useDefaultPropertyFile) {
+      launcher.setPropertiesFile(dummyPropsFile.getAbsolutePath());
+      launcher.conf.put(SparkLauncher.DRIVER_MEMORY, "1g");
+      launcher.conf.put(SparkLauncher.DRIVER_EXTRA_CLASSPATH, "/driver");
+      launcher.conf.put(SparkLauncher.DRIVER_EXTRA_JAVA_OPTIONS, "-Ddriver -XX:MaxPermSize=256m");
+      launcher.conf.put(SparkLauncher.DRIVER_EXTRA_LIBRARY_PATH, "/native");
+    } else {
+      launcher.childEnv.put("SPARK_CONF_DIR", System.getProperty("spark.test.home")
+          + "/launcher/src/test/resources");
+    }
 
     Map<String, String> env = new HashMap<String, String>();
     List<String> cmd = launcher.buildCommand(env);
@@ -216,7 +224,9 @@ private void testCmdBuilder(boolean isDriver) throws Exception {
     }
 
     // Checks below are the same for both driver and non-driver mode.
-    assertEquals(dummyPropsFile.getAbsolutePath(), findArgValue(cmd, parser.PROPERTIES_FILE));
+    if (!useDefaultPropertyFile) {
+      assertEquals(dummyPropsFile.getAbsolutePath(), findArgValue(cmd, parser.PROPERTIES_FILE));
+    }
     assertEquals("yarn", findArgValue(cmd, parser.MASTER));
     assertEquals(deployMode, findArgValue(cmd, parser.DEPLOY_MODE));
     assertEquals("my.Class", findArgValue(cmd, parser.CLASS));
diff --git a/launcher/src/test/resources/spark-defaults.conf b/launcher/src/test/resources/spark-defaults.conf
new file mode 100644
index 000000000000..239fc57883e9
--- /dev/null
+++ b/launcher/src/test/resources/spark-defaults.conf
@@ -0,0 +1,21 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+spark.driver.memory=1g
+spark.driver.extraClassPath=/driver
+spark.driver.extraJavaOptions=-Ddriver -XX:MaxPermSize=256m
+spark.driver.extraLibraryPath=/native
\ No newline at end of file

From 523adc24a683930304f408d477607edfe9de7b76 Mon Sep 17 00:00:00 2001
From: shellberg <sah@zepler.org>
Date: Thu, 15 Oct 2015 18:07:10 +0100
Subject: [PATCH 247/896] [SPARK-11066] Update DAGScheduler's "misbehaved
 ResultHandler"

Restrict tasks (of job) to only 1 to ensure that the causing Exception asserted for job failure is the deliberately thrown DAGSchedulerSuiteDummyException intended, not an UnsupportedOperationException from any second/subsequent tasks that can propagate from a race condition during code execution.

Author: shellberg <sah@zepler.org>

Closes #9076 from shellberg/shellberg-DAGSchedulerSuite-misbehavedResultHandlerTest-patch-1.
---
 .../apache/spark/scheduler/DAGSchedulerSuite.scala  | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 697c195e4ad1..5b01ddb298c3 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -1375,18 +1375,27 @@ class DAGSchedulerSuite
     assert(sc.parallelize(1 to 10, 2).count() === 10)
   }
 
+  /**
+   * The job will be failed on first task throwing a DAGSchedulerSuiteDummyException.
+   *  Any subsequent task WILL throw a legitimate java.lang.UnsupportedOperationException.
+   *  If multiple tasks, there exists a race condition between the SparkDriverExecutionExceptions
+   *  and their differing causes as to which will represent result for job...
+   */
   test("misbehaved resultHandler should not crash DAGScheduler and SparkContext") {
     val e = intercept[SparkDriverExecutionException] {
+      // Number of parallelized partitions implies number of tasks of job
       val rdd = sc.parallelize(1 to 10, 2)
       sc.runJob[Int, Int](
         rdd,
         (context: TaskContext, iter: Iterator[Int]) => iter.size,
-        Seq(0, 1),
+        // For a robust test assertion, limit number of job tasks to 1; that is,
+        // if multiple RDD partitions, use id of any one partition, say, first partition id=0
+        Seq(0),
         (part: Int, result: Int) => throw new DAGSchedulerSuiteDummyException)
     }
     assert(e.getCause.isInstanceOf[DAGSchedulerSuiteDummyException])
 
-    // Make sure we can still run commands
+    // Make sure we can still run commands on our SparkContext
     assert(sc.parallelize(1 to 10, 2).count() === 10)
   }
 

From d45a0d3ca23df86cf0a95508ccc3b4b98f1b611c Mon Sep 17 00:00:00 2001
From: Carson Wang <carson.wang@intel.com>
Date: Thu, 15 Oct 2015 10:36:54 -0700
Subject: [PATCH 248/896] [SPARK-11047] Internal accumulators miss the internal
 flag when replaying events in the history server

Internal accumulators don't write the internal flag to event log. So on the history server Web UI, all accumulators are not internal. This causes incorrect peak execution memory and unwanted accumulator table displayed on the stage page.
To fix it, I add the "internal" property of AccumulableInfo when writing the event log.

Author: Carson Wang <carson.wang@intel.com>

Closes #9061 from carsonwang/accumulableBug.
---
 .../spark/scheduler/AccumulableInfo.scala     |  9 ++
 .../org/apache/spark/util/JsonProtocol.scala  |  6 +-
 .../apache/spark/util/JsonProtocolSuite.scala | 96 +++++++++++++------
 3 files changed, 79 insertions(+), 32 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/AccumulableInfo.scala b/core/src/main/scala/org/apache/spark/scheduler/AccumulableInfo.scala
index b6bff64ee368..146cfb9ba803 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/AccumulableInfo.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/AccumulableInfo.scala
@@ -46,6 +46,15 @@ class AccumulableInfo private[spark] (
 }
 
 object AccumulableInfo {
+  def apply(
+      id: Long,
+      name: String,
+      update: Option[String],
+      value: String,
+      internal: Boolean): AccumulableInfo = {
+    new AccumulableInfo(id, name, update, value, internal)
+  }
+
   def apply(id: Long, name: String, update: Option[String], value: String): AccumulableInfo = {
     new AccumulableInfo(id, name, update, value, internal = false)
   }
diff --git a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
index 40729fa5a4ff..a06dc6f709d3 100644
--- a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
@@ -282,7 +282,8 @@ private[spark] object JsonProtocol {
     ("ID" -> accumulableInfo.id) ~
     ("Name" -> accumulableInfo.name) ~
     ("Update" -> accumulableInfo.update.map(new JString(_)).getOrElse(JNothing)) ~
-    ("Value" -> accumulableInfo.value)
+    ("Value" -> accumulableInfo.value) ~
+    ("Internal" -> accumulableInfo.internal)
   }
 
   def taskMetricsToJson(taskMetrics: TaskMetrics): JValue = {
@@ -696,7 +697,8 @@ private[spark] object JsonProtocol {
     val name = (json \ "Name").extract[String]
     val update = Utils.jsonOption(json \ "Update").map(_.extract[String])
     val value = (json \ "Value").extract[String]
-    AccumulableInfo(id, name, update, value)
+    val internal = (json \ "Internal").extractOpt[Boolean].getOrElse(false)
+    AccumulableInfo(id, name, update, value, internal)
   }
 
   def taskMetricsFromJson(json: JValue): TaskMetrics = {
diff --git a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
index a24bf2931cca..f9572921f43c 100644
--- a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
@@ -364,6 +364,15 @@ class JsonProtocolSuite extends SparkFunSuite {
     assertEquals(expectedDenied, JsonProtocol.taskEndReasonFromJson(oldDenied))
   }
 
+  test("AccumulableInfo backward compatibility") {
+    // "Internal" property of AccumulableInfo were added after 1.5.1.
+    val accumulableInfo = makeAccumulableInfo(1)
+    val oldJson = JsonProtocol.accumulableInfoToJson(accumulableInfo)
+      .removeField({ _._1 == "Internal" })
+    val oldInfo = JsonProtocol.accumulableInfoFromJson(oldJson)
+    assert(false === oldInfo.internal)
+  }
+
   /** -------------------------- *
    | Helper test running methods |
    * --------------------------- */
@@ -723,15 +732,15 @@ class JsonProtocolSuite extends SparkFunSuite {
     val taskInfo = new TaskInfo(a, b, c, d, "executor", "your kind sir", TaskLocality.NODE_LOCAL,
       speculative)
     val (acc1, acc2, acc3) =
-      (makeAccumulableInfo(1), makeAccumulableInfo(2), makeAccumulableInfo(3))
+      (makeAccumulableInfo(1), makeAccumulableInfo(2), makeAccumulableInfo(3, internal = true))
     taskInfo.accumulables += acc1
     taskInfo.accumulables += acc2
     taskInfo.accumulables += acc3
     taskInfo
   }
 
-  private def makeAccumulableInfo(id: Int): AccumulableInfo =
-    AccumulableInfo(id, " Accumulable " + id, Some("delta" + id), "val" + id)
+  private def makeAccumulableInfo(id: Int, internal: Boolean = false): AccumulableInfo =
+    AccumulableInfo(id, " Accumulable " + id, Some("delta" + id), "val" + id, internal)
 
   /**
    * Creates a TaskMetrics object describing a task that read data from Hadoop (if hasHadoopInput is
@@ -812,13 +821,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      }
       |    ]
       |  },
@@ -866,13 +877,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      }
       |    ]
       |  }
@@ -902,19 +915,22 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 3,
       |        "Name": "Accumulable3",
       |        "Update": "delta3",
-      |        "Value": "val3"
+      |        "Value": "val3",
+      |        "Internal": true
       |      }
       |    ]
       |  }
@@ -942,19 +958,22 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 3,
       |        "Name": "Accumulable3",
       |        "Update": "delta3",
-      |        "Value": "val3"
+      |        "Value": "val3",
+      |        "Internal": true
       |      }
       |    ]
       |  }
@@ -988,19 +1007,22 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 3,
       |        "Name": "Accumulable3",
       |        "Update": "delta3",
-      |        "Value": "val3"
+      |        "Value": "val3",
+      |        "Internal": true
       |      }
       |    ]
       |  },
@@ -1074,19 +1096,22 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 3,
       |        "Name": "Accumulable3",
       |        "Update": "delta3",
-      |        "Value": "val3"
+      |        "Value": "val3",
+      |        "Internal": true
       |      }
       |    ]
       |  },
@@ -1157,19 +1182,22 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        "ID": 1,
       |        "Name": "Accumulable1",
       |        "Update": "delta1",
-      |        "Value": "val1"
+      |        "Value": "val1",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 2,
       |        "Name": "Accumulable2",
       |        "Update": "delta2",
-      |        "Value": "val2"
+      |        "Value": "val2",
+      |        "Internal": false
       |      },
       |      {
       |        "ID": 3,
       |        "Name": "Accumulable3",
       |        "Update": "delta3",
-      |        "Value": "val3"
+      |        "Value": "val3",
+      |        "Internal": true
       |      }
       |    ]
       |  },
@@ -1251,13 +1279,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |          "ID": 2,
       |          "Name": " Accumulable 2",
       |          "Update": "delta2",
-      |          "Value": "val2"
+      |          "Value": "val2",
+      |          "Internal": false
       |        },
       |        {
       |          "ID": 1,
       |          "Name": " Accumulable 1",
       |          "Update": "delta1",
-      |          "Value": "val1"
+      |          "Value": "val1",
+      |          "Internal": false
       |        }
       |      ]
       |    },
@@ -1309,13 +1339,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |          "ID": 2,
       |          "Name": " Accumulable 2",
       |          "Update": "delta2",
-      |          "Value": "val2"
+      |          "Value": "val2",
+      |          "Internal": false
       |        },
       |        {
       |          "ID": 1,
       |          "Name": " Accumulable 1",
       |          "Update": "delta1",
-      |          "Value": "val1"
+      |          "Value": "val1",
+      |          "Internal": false
       |        }
       |      ]
       |    },
@@ -1384,13 +1416,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |          "ID": 2,
       |          "Name": " Accumulable 2",
       |          "Update": "delta2",
-      |          "Value": "val2"
+      |          "Value": "val2",
+      |          "Internal": false
       |        },
       |        {
       |          "ID": 1,
       |          "Name": " Accumulable 1",
       |          "Update": "delta1",
-      |          "Value": "val1"
+      |          "Value": "val1",
+      |          "Internal": false
       |        }
       |      ]
       |    },
@@ -1476,13 +1510,15 @@ class JsonProtocolSuite extends SparkFunSuite {
       |          "ID": 2,
       |          "Name": " Accumulable 2",
       |          "Update": "delta2",
-      |          "Value": "val2"
+      |          "Value": "val2",
+      |          "Internal": false
       |        },
       |        {
       |          "ID": 1,
       |          "Name": " Accumulable 1",
       |          "Update": "delta1",
-      |          "Value": "val1"
+      |          "Value": "val1",
+      |          "Internal": false
       |        }
       |      ]
       |    }

From b591de7c07ba8e71092f71e34001520bec995a8a Mon Sep 17 00:00:00 2001
From: Nick Pritchard <nicholas.pritchard@falkonry.com>
Date: Thu, 15 Oct 2015 12:45:37 -0700
Subject: [PATCH 249/896] [SPARK-11039][Documentation][Web UI] Document
 additional ui configurations

Add documentation for configuration:
- spark.sql.ui.retainedExecutions
- spark.streaming.ui.retainedBatches

Author: Nick Pritchard <nicholas.pritchard@falkonry.com>

Closes #9052 from pnpritchard/SPARK-11039.
---
 docs/configuration.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/docs/configuration.md b/docs/configuration.md
index 771d93be04b0..46d92ceb762d 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -554,6 +554,20 @@ Apart from these, the following properties are also available, and may be useful
     How many finished drivers the Spark UI and status APIs remember before garbage collecting.
   </td>
 </tr>
+<tr>
+  <td><code>spark.sql.ui.retainedExecutions</code></td>
+  <td>1000</td>
+  <td>
+    How many finished executions the Spark UI and status APIs remember before garbage collecting.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.streaming.ui.retainedBatches</code></td>
+  <td>1000</td>
+  <td>
+    How many finished batches the Spark UI and status APIs remember before garbage collecting.
+  </td>
+</tr>
 </table>
 
 #### Compression and Serialization

From a5719804c5ed99ce36bd0dd230ab8b3b7a3b92e3 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 15 Oct 2015 14:46:40 -0700
Subject: [PATCH 250/896] [SPARK-11071] [LAUNCHER] Fix flakiness in
 LauncherServerSuite::timeout.

The test could fail depending on scheduling of the various threads
involved; the change removes some sources of races, while making the
test a little more resilient by trying a few times before giving up.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9079 from vanzin/SPARK-11071.
---
 .../apache/spark/launcher/LauncherServer.java |  9 ++++-
 .../spark/launcher/LauncherServerSuite.java   | 35 ++++++++++++++-----
 2 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
index c5fd40816d62..d099ee9aa9da 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/LauncherServer.java
@@ -242,7 +242,14 @@ public void run() {
           synchronized (clients) {
             clients.add(clientConnection);
           }
-          timeoutTimer.schedule(timeout, getConnectionTimeout());
+          long timeoutMs = getConnectionTimeout();
+          // 0 is used for testing to avoid issues with clock resolution / thread scheduling,
+          // and force an immediate timeout.
+          if (timeoutMs > 0) {
+            timeoutTimer.schedule(timeout, getConnectionTimeout());
+          } else {
+            timeout.run();
+          }
         }
       }
     } catch (IOException ioe) {
diff --git a/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java b/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java
index 27cd1061a15b..dc8fbb58d880 100644
--- a/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java
+++ b/launcher/src/test/java/org/apache/spark/launcher/LauncherServerSuite.java
@@ -121,12 +121,12 @@ private void wakeUp() {
 
   @Test
   public void testTimeout() throws Exception {
-    final long TEST_TIMEOUT = 10L;
-
     ChildProcAppHandle handle = null;
     TestClient client = null;
     try {
-      SparkLauncher.setConfig(SparkLauncher.CHILD_CONNECTION_TIMEOUT, String.valueOf(TEST_TIMEOUT));
+      // LauncherServer will immediately close the server-side socket when the timeout is set
+      // to 0.
+      SparkLauncher.setConfig(SparkLauncher.CHILD_CONNECTION_TIMEOUT, "0");
 
       handle = LauncherServer.newAppHandle();
 
@@ -134,12 +134,29 @@ public void testTimeout() throws Exception {
         LauncherServer.getServerInstance().getPort());
       client = new TestClient(s);
 
-      Thread.sleep(TEST_TIMEOUT * 10);
-      try {
-        client.send(new Hello(handle.getSecret(), "1.4.0"));
-        fail("Expected exception caused by connection timeout.");
-      } catch (IllegalStateException e) {
-        // Expected.
+      // Try a few times since the client-side socket may not reflect the server-side close
+      // immediately.
+      boolean helloSent = false;
+      int maxTries = 10;
+      for (int i = 0; i < maxTries; i++) {
+        try {
+          if (!helloSent) {
+            client.send(new Hello(handle.getSecret(), "1.4.0"));
+            helloSent = true;
+          } else {
+            client.send(new SetAppId("appId"));
+          }
+          fail("Expected exception caused by connection timeout.");
+        } catch (IllegalStateException | IOException e) {
+          // Expected.
+          break;
+        } catch (AssertionError e) {
+          if (i < maxTries - 1) {
+            Thread.sleep(100);
+          } else {
+            throw new AssertionError("Test failed after " + maxTries + " attempts.", e);
+          }
+        }
       }
     } finally {
       SparkLauncher.launcherConfig.remove(SparkLauncher.CHILD_CONNECTION_TIMEOUT);

From 723aa75a9d566c698aa49597f4f655396fef77bd Mon Sep 17 00:00:00 2001
From: Britta Weber <britta.weber@elasticsearch.com>
Date: Thu, 15 Oct 2015 14:47:11 -0700
Subject: [PATCH 251/896] fix typo bellow -> below

Author: Britta Weber <britta.weber@elasticsearch.com>

Closes #9136 from brwe/typo-bellow.
---
 docs/mllib-collaborative-filtering.md | 2 +-
 docs/mllib-linear-methods.md          | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/docs/mllib-collaborative-filtering.md b/docs/mllib-collaborative-filtering.md
index b3fd51dca5c9..1ad52123c74a 100644
--- a/docs/mllib-collaborative-filtering.md
+++ b/docs/mllib-collaborative-filtering.md
@@ -119,7 +119,7 @@ All of MLlib's methods use Java-friendly types, so you can import and call them
 way you do in Scala. The only caveat is that the methods take Scala RDD objects, while the
 Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a Scala one by
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
-that is equivalent to the provided example in Scala is given bellow:
+that is equivalent to the provided example in Scala is given below:
 
 Refer to the [`ALS` Java docs](api/java/org/apache/spark/mllib/recommendation/ALS.html) for details on the API.
 
diff --git a/docs/mllib-linear-methods.md b/docs/mllib-linear-methods.md
index a3e1620c778f..0c76e6e99946 100644
--- a/docs/mllib-linear-methods.md
+++ b/docs/mllib-linear-methods.md
@@ -230,7 +230,7 @@ All of MLlib's methods use Java-friendly types, so you can import and call them
 way you do in Scala. The only caveat is that the methods take Scala RDD objects, while the
 Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a Scala one by
 calling `.rdd()` on your `JavaRDD` object. A self-contained application example
-that is equivalent to the provided example in Scala is given bellow:
+that is equivalent to the provided example in Scala is given below:
 
 Refer to the [`SVMWithSGD` Java docs](api/java/org/apache/spark/mllib/classification/SVMWithSGD.html) and [`SVMModel` Java docs](api/java/org/apache/spark/mllib/classification/SVMModel.html) for details on the API.
 
@@ -612,7 +612,7 @@ All of MLlib's methods use Java-friendly types, so you can import and call them
 way you do in Scala. The only caveat is that the methods take Scala RDD objects, while the
 Spark Java API uses a separate `JavaRDD` class. You can convert a Java RDD to a Scala one by
 calling `.rdd()` on your `JavaRDD` object. The corresponding Java example to
-the Scala snippet provided, is presented bellow:
+the Scala snippet provided, is presented below:
 
 Refer to the [`LinearRegressionWithSGD` Java docs](api/java/org/apache/spark/mllib/regression/LinearRegressionWithSGD.html) and [`LinearRegressionModel` Java docs](api/java/org/apache/spark/mllib/regression/LinearRegressionModel.html) for details on the API.
 

From 2d000124b72d0ff9e3ecefa03923405642516c4c Mon Sep 17 00:00:00 2001
From: KaiXinXiaoLei <huleilei1@huawei.com>
Date: Thu, 15 Oct 2015 14:48:01 -0700
Subject: [PATCH 252/896] [SPARK-10515] When killing executor, the pending
 replacement executors should not be lost

If the heartbeat receiver kills executors (and new ones are not registered to replace them), the idle timeout for the old executors will be lost (and then change a total number of executors requested by Driver), So new ones will be not to asked to replace them.
For example, executorsPendingToRemove=Set(1), and executor 2 is idle timeout before a new executor is asked to replace executor 1. Then driver kill executor 2, and sending RequestExecutors to AM. But executorsPendingToRemove=Set(1,2), So AM doesn't allocate a executor to replace 1.

see: https://github.com/apache/spark/pull/8668

Author: KaiXinXiaoLei <huleilei1@huawei.com>
Author: huleilei <huleilei1@huawei.com>

Closes #8945 from KaiXinXiaoLei/pendingexecutor.
---
 .../CoarseGrainedSchedulerBackend.scala       |  2 ++
 .../StandaloneDynamicAllocationSuite.scala    | 35 +++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index 18771f79b44b..55a564b5c8ea 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -438,6 +438,8 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     if (!replace) {
       doRequestTotalExecutors(
         numExistingExecutors + numPendingExecutors - executorsPendingToRemove.size)
+    } else {
+      numPendingExecutors += knownExecutors.size
     }
 
     doKillExecutors(executorsToKill)
diff --git a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
index 2e2fa22eb477..d145e78834b1 100644
--- a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
@@ -369,6 +369,41 @@ class StandaloneDynamicAllocationSuite
     assert(apps.head.getExecutorLimit === 1)
   }
 
+  test("the pending replacement executors should not be lost (SPARK-10515)") {
+    sc = new SparkContext(appConf)
+    val appId = sc.applicationId
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
+    // sync executors between the Master and the driver, needed because
+    // the driver refuses to kill executors it does not know about
+    syncExecutors(sc)
+    val executors = getExecutorIds(sc)
+    assert(executors.size === 2)
+    // kill executor 1, and replace it
+    assert(sc.killAndReplaceExecutor(executors.head))
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.head.executors.size === 2)
+    }
+
+    var apps = getApplications()
+    // kill executor 1
+    assert(sc.killExecutor(executors.head))
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+    assert(apps.head.getExecutorLimit === 2)
+    // kill executor 2
+    assert(sc.killExecutor(executors(1)))
+    apps = getApplications()
+    assert(apps.head.executors.size === 1)
+    assert(apps.head.getExecutorLimit === 1)
+  }
+
   // ===============================
   // | Utility methods for testing |
   // ===============================

From 3b364ff0a4f38c2b8023429a55623de32be5f329 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Thu, 15 Oct 2015 14:50:01 -0700
Subject: [PATCH 253/896] [SPARK-11078] Ensure spilling tests actually spill

#9084 uncovered that many tests that test spilling don't actually spill. This is a follow-up patch to fix that to ensure our unit tests actually catch potential bugs in spilling. The size of this patch is inflated by the refactoring of `ExternalSorterSuite`, which had a lot of duplicate code and logic.

Author: Andrew Or <andrew@databricks.com>

Closes #9124 from andrewor14/spilling-tests.
---
 .../scala/org/apache/spark/TestUtils.scala    |  51 +
 .../spark/shuffle/ShuffleMemoryManager.scala  |   6 +-
 .../collection/ExternalAppendOnlyMap.scala    |   6 +
 .../spark/util/collection/Spillable.scala     |  37 +-
 .../org/apache/spark/DistributedSuite.scala   |  39 +-
 .../ExternalAppendOnlyMapSuite.scala          | 103 ++-
 .../util/collection/ExternalSorterSuite.scala | 871 ++++++++----------
 .../execution/TestShuffleMemoryManager.scala  |   2 +
 8 files changed, 534 insertions(+), 581 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/TestUtils.scala b/core/src/main/scala/org/apache/spark/TestUtils.scala
index 888763a3e8eb..acfe751f6c74 100644
--- a/core/src/main/scala/org/apache/spark/TestUtils.scala
+++ b/core/src/main/scala/org/apache/spark/TestUtils.scala
@@ -24,10 +24,14 @@ import java.util.Arrays
 import java.util.jar.{JarEntry, JarOutputStream}
 
 import scala.collection.JavaConverters._
+import scala.collection.mutable
+import scala.collection.mutable.ArrayBuffer
 
 import com.google.common.io.{ByteStreams, Files}
 import javax.tools.{JavaFileObject, SimpleJavaFileObject, ToolProvider}
 
+import org.apache.spark.executor.TaskMetrics
+import org.apache.spark.scheduler._
 import org.apache.spark.util.Utils
 
 /**
@@ -154,4 +158,51 @@ private[spark] object TestUtils {
       "  @Override public String toString() { return \"" + toStringValue + "\"; }}")
     createCompiledClass(className, destDir, sourceFile, classpathUrls)
   }
+
+  /**
+   * Run some code involving jobs submitted to the given context and assert that the jobs spilled.
+   */
+  def assertSpilled[T](sc: SparkContext, identifier: String)(body: => T): Unit = {
+    val spillListener = new SpillListener
+    sc.addSparkListener(spillListener)
+    body
+    assert(spillListener.numSpilledStages > 0, s"expected $identifier to spill, but did not")
+  }
+
+  /**
+   * Run some code involving jobs submitted to the given context and assert that the jobs
+   * did not spill.
+   */
+  def assertNotSpilled[T](sc: SparkContext, identifier: String)(body: => T): Unit = {
+    val spillListener = new SpillListener
+    sc.addSparkListener(spillListener)
+    body
+    assert(spillListener.numSpilledStages == 0, s"expected $identifier to not spill, but did")
+  }
+
+}
+
+
+/**
+ * A [[SparkListener]] that detects whether spills have occurred in Spark jobs.
+ */
+private class SpillListener extends SparkListener {
+  private val stageIdToTaskMetrics = new mutable.HashMap[Int, ArrayBuffer[TaskMetrics]]
+  private val spilledStageIds = new mutable.HashSet[Int]
+
+  def numSpilledStages: Int = spilledStageIds.size
+
+  override def onTaskEnd(taskEnd: SparkListenerTaskEnd): Unit = {
+    stageIdToTaskMetrics.getOrElseUpdate(
+      taskEnd.stageId, new ArrayBuffer[TaskMetrics]) += taskEnd.taskMetrics
+  }
+
+  override def onStageCompleted(stageComplete: SparkListenerStageCompleted): Unit = {
+    val stageId = stageComplete.stageInfo.stageId
+    val metrics = stageIdToTaskMetrics.remove(stageId).toSeq.flatten
+    val spilled = metrics.map(_.memoryBytesSpilled).sum > 0
+    if (spilled) {
+      spilledStageIds += stageId
+    }
+  }
 }
diff --git a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
index aaf543ce9232..9bd18da47f1a 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
@@ -139,8 +139,10 @@ class ShuffleMemoryManager protected (
       throw new SparkException(
         s"Internal error: release called on $numBytes bytes but task only has $curMem")
     }
-    taskMemory(taskAttemptId) -= numBytes
-    memoryManager.releaseExecutionMemory(numBytes)
+    if (taskMemory.contains(taskAttemptId)) {
+      taskMemory(taskAttemptId) -= numBytes
+      memoryManager.releaseExecutionMemory(numBytes)
+    }
     memoryManager.notifyAll() // Notify waiters in tryToAcquire that memory has been freed
   }
 
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
index 6a96b5dc1268..cfa58f5ef408 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
@@ -95,6 +95,12 @@ class ExternalAppendOnlyMap[K, V, C](
   private val keyComparator = new HashComparator[K]
   private val ser = serializer.newInstance()
 
+  /**
+   * Number of files this map has spilled so far.
+   * Exposed for testing.
+   */
+  private[collection] def numSpills: Int = spilledMaps.size
+
   /**
    * Insert the given key and value into the map.
    */
diff --git a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
index 747ecf075a39..d2a68ca7a3b4 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
@@ -43,10 +43,15 @@ private[spark] trait Spillable[C] extends Logging {
   private[this] val shuffleMemoryManager = SparkEnv.get.shuffleMemoryManager
 
   // Initial threshold for the size of a collection before we start tracking its memory usage
-  // Exposed for testing
+  // For testing only
   private[this] val initialMemoryThreshold: Long =
     SparkEnv.get.conf.getLong("spark.shuffle.spill.initialMemoryThreshold", 5 * 1024 * 1024)
 
+  // Force this collection to spill when there are this many elements in memory
+  // For testing only
+  private[this] val numElementsForceSpillThreshold: Long =
+    SparkEnv.get.conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MaxValue)
+
   // Threshold for this collection's size in bytes before we start tracking its memory usage
   // To avoid a large number of small spills, initialize this to a value orders of magnitude > 0
   private[this] var myMemoryThreshold = initialMemoryThreshold
@@ -69,27 +74,27 @@ private[spark] trait Spillable[C] extends Logging {
    * @return true if `collection` was spilled to disk; false otherwise
    */
   protected def maybeSpill(collection: C, currentMemory: Long): Boolean = {
+    var shouldSpill = false
     if (elementsRead % 32 == 0 && currentMemory >= myMemoryThreshold) {
       // Claim up to double our current memory from the shuffle memory pool
       val amountToRequest = 2 * currentMemory - myMemoryThreshold
       val granted = shuffleMemoryManager.tryToAcquire(amountToRequest)
       myMemoryThreshold += granted
-      if (myMemoryThreshold <= currentMemory) {
-        // We were granted too little memory to grow further (either tryToAcquire returned 0,
-        // or we already had more memory than myMemoryThreshold); spill the current collection
-        _spillCount += 1
-        logSpillage(currentMemory)
-
-        spill(collection)
-
-        _elementsRead = 0
-        // Keep track of spills, and release memory
-        _memoryBytesSpilled += currentMemory
-        releaseMemoryForThisThread()
-        return true
-      }
+      // If we were granted too little memory to grow further (either tryToAcquire returned 0,
+      // or we already had more memory than myMemoryThreshold), spill the current collection
+      shouldSpill = currentMemory >= myMemoryThreshold
+    }
+    shouldSpill = shouldSpill || _elementsRead > numElementsForceSpillThreshold
+    // Actually spill
+    if (shouldSpill) {
+      _spillCount += 1
+      logSpillage(currentMemory)
+      spill(collection)
+      _elementsRead = 0
+      _memoryBytesSpilled += currentMemory
+      releaseMemoryForThisThread()
     }
-    false
+    shouldSpill
   }
 
   /**
diff --git a/core/src/test/scala/org/apache/spark/DistributedSuite.scala b/core/src/test/scala/org/apache/spark/DistributedSuite.scala
index 34a4bb968e73..1c3f2bc315dd 100644
--- a/core/src/test/scala/org/apache/spark/DistributedSuite.scala
+++ b/core/src/test/scala/org/apache/spark/DistributedSuite.scala
@@ -203,22 +203,35 @@ class DistributedSuite extends SparkFunSuite with Matchers with LocalSparkContex
   }
 
   test("compute without caching when no partitions fit in memory") {
-    sc = new SparkContext(clusterUrl, "test")
-    // data will be 4 million * 4 bytes = 16 MB in size, but our memoryFraction set the cache
-    // to only 50 KB (0.0001 of 512 MB), so no partitions should fit in memory
-    val data = sc.parallelize(1 to 4000000, 2).persist(StorageLevel.MEMORY_ONLY_SER)
-    assert(data.count() === 4000000)
-    assert(data.count() === 4000000)
-    assert(data.count() === 4000000)
+    val size = 10000
+    val conf = new SparkConf()
+      .set("spark.storage.unrollMemoryThreshold", "1024")
+      .set("spark.testing.memory", (size / 2).toString)
+    sc = new SparkContext(clusterUrl, "test", conf)
+    val data = sc.parallelize(1 to size, 2).persist(StorageLevel.MEMORY_ONLY)
+    assert(data.count() === size)
+    assert(data.count() === size)
+    assert(data.count() === size)
+    // ensure only a subset of partitions were cached
+    val rddBlocks = sc.env.blockManager.master.getMatchingBlockIds(_.isRDD, askSlaves = true)
+    assert(rddBlocks.size === 0, s"expected no RDD blocks, found ${rddBlocks.size}")
   }
 
   test("compute when only some partitions fit in memory") {
-    sc = new SparkContext(clusterUrl, "test", new SparkConf)
-    // TODO: verify that only a subset of partitions fit in memory (SPARK-11078)
-    val data = sc.parallelize(1 to 4000000, 20).persist(StorageLevel.MEMORY_ONLY_SER)
-    assert(data.count() === 4000000)
-    assert(data.count() === 4000000)
-    assert(data.count() === 4000000)
+    val size = 10000
+    val numPartitions = 10
+    val conf = new SparkConf()
+      .set("spark.storage.unrollMemoryThreshold", "1024")
+      .set("spark.testing.memory", (size * numPartitions).toString)
+    sc = new SparkContext(clusterUrl, "test", conf)
+    val data = sc.parallelize(1 to size, numPartitions).persist(StorageLevel.MEMORY_ONLY)
+    assert(data.count() === size)
+    assert(data.count() === size)
+    assert(data.count() === size)
+    // ensure only a subset of partitions were cached
+    val rddBlocks = sc.env.blockManager.master.getMatchingBlockIds(_.isRDD, askSlaves = true)
+    assert(rddBlocks.size > 0, "no RDD blocks found")
+    assert(rddBlocks.size < numPartitions, s"too many RDD blocks found, expected <$numPartitions")
   }
 
   test("passing environment variables to cluster") {
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
index 0a03c32c647a..5cb506ea2164 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
@@ -22,9 +22,10 @@ import scala.collection.mutable.ArrayBuffer
 import org.apache.spark._
 import org.apache.spark.io.CompressionCodec
 
-// TODO: some of these spilling tests probably aren't actually spilling (SPARK-11078)
 
 class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
+  import TestUtils.{assertNotSpilled, assertSpilled}
+
   private val allCompressionCodecs = CompressionCodec.ALL_COMPRESSION_CODECS
   private def createCombiner[T](i: T) = ArrayBuffer[T](i)
   private def mergeValue[T](buffer: ArrayBuffer[T], i: T): ArrayBuffer[T] = buffer += i
@@ -244,54 +245,53 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
    * If a compression codec is provided, use it. Otherwise, do not compress spills.
    */
   private def testSimpleSpilling(codec: Option[String] = None): Unit = {
+    val size = 1000
     val conf = createSparkConf(loadDefaults = true, codec)  // Load defaults for Spark home
+    conf.set("spark.shuffle.manager", "hash") // avoid using external sorter
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 4).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
-    // reduceByKey - should spill ~8 times
-    val rddA = sc.parallelize(0 until 100000).map(i => (i/2, i))
-    val resultA = rddA.reduceByKey(math.max).collect()
-    assert(resultA.length === 50000)
-    resultA.foreach { case (k, v) =>
-      assert(v === k * 2 + 1, s"Value for $k was wrong: expected ${k * 2 + 1}, got $v")
+    assertSpilled(sc, "reduceByKey") {
+      val result = sc.parallelize(0 until size)
+        .map { i => (i / 2, i) }.reduceByKey(math.max).collect()
+      assert(result.length === size / 2)
+      result.foreach { case (k, v) =>
+        val expected = k * 2 + 1
+        assert(v === expected, s"Value for $k was wrong: expected $expected, got $v")
+      }
     }
 
-    // groupByKey - should spill ~17 times
-    val rddB = sc.parallelize(0 until 100000).map(i => (i/4, i))
-    val resultB = rddB.groupByKey().collect()
-    assert(resultB.length === 25000)
-    resultB.foreach { case (i, seq) =>
-      val expected = Set(i * 4, i * 4 + 1, i * 4 + 2, i * 4 + 3)
-      assert(seq.toSet === expected,
-        s"Value for $i was wrong: expected $expected, got ${seq.toSet}")
+    assertSpilled(sc, "groupByKey") {
+      val result = sc.parallelize(0 until size).map { i => (i / 2, i) }.groupByKey().collect()
+      assert(result.length == size / 2)
+      result.foreach { case (i, seq) =>
+        val actual = seq.toSet
+        val expected = Set(i * 2, i * 2 + 1)
+        assert(actual === expected, s"Value for $i was wrong: expected $expected, got $actual")
+      }
     }
 
-    // cogroup - should spill ~7 times
-    val rddC1 = sc.parallelize(0 until 10000).map(i => (i, i))
-    val rddC2 = sc.parallelize(0 until 10000).map(i => (i%1000, i))
-    val resultC = rddC1.cogroup(rddC2).collect()
-    assert(resultC.length === 10000)
-    resultC.foreach { case (i, (seq1, seq2)) =>
-      i match {
-        case 0 =>
-          assert(seq1.toSet === Set[Int](0))
-          assert(seq2.toSet === Set[Int](0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000))
-        case 1 =>
-          assert(seq1.toSet === Set[Int](1))
-          assert(seq2.toSet === Set[Int](1, 1001, 2001, 3001, 4001, 5001, 6001, 7001, 8001, 9001))
-        case 5000 =>
-          assert(seq1.toSet === Set[Int](5000))
-          assert(seq2.toSet === Set[Int]())
-        case 9999 =>
-          assert(seq1.toSet === Set[Int](9999))
-          assert(seq2.toSet === Set[Int]())
-        case _ =>
+    assertSpilled(sc, "cogroup") {
+      val rdd1 = sc.parallelize(0 until size).map { i => (i / 2, i) }
+      val rdd2 = sc.parallelize(0 until size).map { i => (i / 2, i) }
+      val result = rdd1.cogroup(rdd2).collect()
+      assert(result.length === size / 2)
+      result.foreach { case (i, (seq1, seq2)) =>
+        val actual1 = seq1.toSet
+        val actual2 = seq2.toSet
+        val expected = Set(i * 2, i * 2 + 1)
+        assert(actual1 === expected, s"Value 1 for $i was wrong: expected $expected, got $actual1")
+        assert(actual2 === expected, s"Value 2 for $i was wrong: expected $expected, got $actual2")
       }
     }
+
     sc.stop()
   }
 
   test("spilling with hash collisions") {
+    val size = 1000
     val conf = createSparkConf(loadDefaults = true)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[String]
 
@@ -315,11 +315,12 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
       assert(w1.hashCode === w2.hashCode)
     }
 
-    map.insertAll((1 to 100000).iterator.map(_.toString).map(i => (i, i)))
+    map.insertAll((1 to size).iterator.map(_.toString).map(i => (i, i)))
     collisionPairs.foreach { case (w1, w2) =>
       map.insert(w1, w2)
       map.insert(w2, w1)
     }
+    assert(map.numSpills > 0, "map did not spill")
 
     // A map of collision pairs in both directions
     val collisionPairsMap = (collisionPairs ++ collisionPairs.map(_.swap)).toMap
@@ -334,22 +335,25 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
       assert(kv._2.equals(expectedValue))
       count += 1
     }
-    assert(count === 100000 + collisionPairs.size * 2)
+    assert(count === size + collisionPairs.size * 2)
     sc.stop()
   }
 
   test("spilling with many hash collisions") {
+    val size = 1000
     val conf = createSparkConf(loadDefaults = true)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = new ExternalAppendOnlyMap[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
 
     // Insert 10 copies each of lots of objects whose hash codes are either 0 or 1. This causes
     // problems if the map fails to group together the objects with the same code (SPARK-2043).
     for (i <- 1 to 10) {
-      for (j <- 1 to 10000) {
+      for (j <- 1 to size) {
         map.insert(FixedHashObject(j, j % 2), 1)
       }
     }
+    assert(map.numSpills > 0, "map did not spill")
 
     val it = map.iterator
     var count = 0
@@ -358,17 +362,20 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
       assert(kv._2 === 10)
       count += 1
     }
-    assert(count === 10000)
+    assert(count === size)
     sc.stop()
   }
 
   test("spilling with hash collisions using the Int.MaxValue key") {
+    val size = 1000
     val conf = createSparkConf(loadDefaults = true)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[Int]
 
-    (1 to 100000).foreach { i => map.insert(i, i) }
+    (1 to size).foreach { i => map.insert(i, i) }
     map.insert(Int.MaxValue, Int.MaxValue)
+    assert(map.numSpills > 0, "map did not spill")
 
     val it = map.iterator
     while (it.hasNext) {
@@ -379,14 +386,17 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   test("spilling with null keys and values") {
+    val size = 1000
     val conf = createSparkConf(loadDefaults = true)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
     val map = createExternalMap[Int]
 
-    map.insertAll((1 to 100000).iterator.map(i => (i, i)))
+    map.insertAll((1 to size).iterator.map(i => (i, i)))
     map.insert(null.asInstanceOf[Int], 1)
     map.insert(1, null.asInstanceOf[Int])
     map.insert(null.asInstanceOf[Int], null.asInstanceOf[Int])
+    assert(map.numSpills > 0, "map did not spill")
 
     val it = map.iterator
     while (it.hasNext) {
@@ -397,17 +407,22 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   test("external aggregation updates peak execution memory") {
+    val spillThreshold = 1000
     val conf = createSparkConf(loadDefaults = false)
       .set("spark.shuffle.manager", "hash") // make sure we're not also using ExternalSorter
-      .set("spark.testing.memory", (10 * 1024 * 1024).toString)
+      .set("spark.shuffle.spill.numElementsForceSpillThreshold", spillThreshold.toString)
     sc = new SparkContext("local", "test", conf)
     // No spilling
     AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external map without spilling") {
-      sc.parallelize(1 to 10, 2).map { i => (i, i) }.reduceByKey(_ + _).count()
+      assertNotSpilled(sc, "verify peak memory") {
+        sc.parallelize(1 to spillThreshold / 2, 2).map { i => (i, i) }.reduceByKey(_ + _).count()
+      }
     }
     // With spilling
     AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external map with spilling") {
-      sc.parallelize(1 to 1000 * 1000, 2).map { i => (i, i) }.reduceByKey(_ + _).count()
+      assertSpilled(sc, "verify peak memory") {
+        sc.parallelize(1 to spillThreshold * 3, 2).map { i => (i, i) }.reduceByKey(_ + _).count()
+      }
     }
   }
 
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
index 651c7eaa65ff..e2cb791771d9 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
@@ -18,535 +18,92 @@
 package org.apache.spark.util.collection
 
 import scala.collection.mutable.ArrayBuffer
-
 import scala.util.Random
 
 import org.apache.spark._
 import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
 
-// TODO: some of these spilling tests probably aren't actually spilling (SPARK-11078)
 
 class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
-  private def createSparkConf(loadDefaults: Boolean, kryo: Boolean): SparkConf = {
-    val conf = new SparkConf(loadDefaults)
-    if (kryo) {
-      conf.set("spark.serializer", classOf[KryoSerializer].getName)
-    } else {
-      // Make the Java serializer write a reset instruction (TC_RESET) after each object to test
-      // for a bug we had with bytes written past the last object in a batch (SPARK-2792)
-      conf.set("spark.serializer.objectStreamReset", "1")
-      conf.set("spark.serializer", classOf[JavaSerializer].getName)
-    }
-    conf.set("spark.shuffle.sort.bypassMergeThreshold", "0")
-    // Ensure that we actually have multiple batches per spill file
-    conf.set("spark.shuffle.spill.batchSize", "10")
-    conf.set("spark.testing.memory", "2000000")
-    conf
-  }
-
-  test("empty data stream with kryo ser") {
-    emptyDataStream(createSparkConf(false, true))
-  }
-
-  test("empty data stream with java ser") {
-    emptyDataStream(createSparkConf(false, false))
-  }
-
-  def emptyDataStream(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
-    val ord = implicitly[Ordering[Int]]
-
-    // Both aggregator and ordering
-    val sorter = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(3)), Some(ord), None)
-    assert(sorter.iterator.toSeq === Seq())
-    sorter.stop()
-
-    // Only aggregator
-    val sorter2 = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(3)), None, None)
-    assert(sorter2.iterator.toSeq === Seq())
-    sorter2.stop()
-
-    // Only ordering
-    val sorter3 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    assert(sorter3.iterator.toSeq === Seq())
-    sorter3.stop()
-
-    // Neither aggregator nor ordering
-    val sorter4 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), None, None)
-    assert(sorter4.iterator.toSeq === Seq())
-    sorter4.stop()
-  }
+  import TestUtils.{assertNotSpilled, assertSpilled}
 
-  test("few elements per partition with kryo ser") {
-    fewElementsPerPartition(createSparkConf(false, true))
-  }
+  testWithMultipleSer("empty data stream")(emptyDataStream)
 
-  test("few elements per partition with java ser") {
-    fewElementsPerPartition(createSparkConf(false, false))
-  }
+  testWithMultipleSer("few elements per partition")(fewElementsPerPartition)
 
-  def fewElementsPerPartition(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
-    val ord = implicitly[Ordering[Int]]
-    val elements = Set((1, 1), (2, 2), (5, 5))
-    val expected = Set(
-      (0, Set()), (1, Set((1, 1))), (2, Set((2, 2))), (3, Set()), (4, Set()),
-      (5, Set((5, 5))), (6, Set()))
-
-    // Both aggregator and ordering
-    val sorter = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(7)), Some(ord), None)
-    sorter.insertAll(elements.iterator)
-    assert(sorter.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
-    sorter.stop()
-
-    // Only aggregator
-    val sorter2 = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(7)), None, None)
-    sorter2.insertAll(elements.iterator)
-    assert(sorter2.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
-    sorter2.stop()
+  testWithMultipleSer("empty partitions with spilling")(emptyPartitionsWithSpilling)
 
-    // Only ordering
-    val sorter3 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), Some(ord), None)
-    sorter3.insertAll(elements.iterator)
-    assert(sorter3.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
-    sorter3.stop()
-
-    // Neither aggregator nor ordering
-    val sorter4 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), None, None)
-    sorter4.insertAll(elements.iterator)
-    assert(sorter4.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
-    sorter4.stop()
-  }
-
-  test("empty partitions with spilling with kryo ser") {
-    emptyPartitionsWithSpilling(createSparkConf(false, true))
+  // Load defaults, otherwise SPARK_HOME is not found
+  testWithMultipleSer("spilling in local cluster", loadDefaults = true) {
+    (conf: SparkConf) => testSpillingInLocalCluster(conf, 2)
   }
 
-  test("empty partitions with spilling with java ser") {
-    emptyPartitionsWithSpilling(createSparkConf(false, false))
-  }
-
-  def emptyPartitionsWithSpilling(conf: SparkConf) {
-    conf.set("spark.shuffle.spill.initialMemoryThreshold", "512")
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val ord = implicitly[Ordering[Int]]
-    val elements = Iterator((1, 1), (5, 5)) ++ (0 until 100000).iterator.map(x => (2, 2))
-
-    val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), Some(ord), None)
-    sorter.insertAll(elements)
-    assert(sc.env.blockManager.diskBlockManager.getAllFiles().length > 0) // Make sure it spilled
-    val iter = sorter.partitionedIterator.map(p => (p._1, p._2.toList))
-    assert(iter.next() === (0, Nil))
-    assert(iter.next() === (1, List((1, 1))))
-    assert(iter.next() === (2, (0 until 100000).map(x => (2, 2)).toList))
-    assert(iter.next() === (3, Nil))
-    assert(iter.next() === (4, Nil))
-    assert(iter.next() === (5, List((5, 5))))
-    assert(iter.next() === (6, Nil))
-    sorter.stop()
-  }
-
-  test("spilling in local cluster with kryo ser") {
-    // Load defaults, otherwise SPARK_HOME is not found
-    testSpillingInLocalCluster(createSparkConf(true, true))
-  }
-
-  test("spilling in local cluster with java ser") {
-    // Load defaults, otherwise SPARK_HOME is not found
-    testSpillingInLocalCluster(createSparkConf(true, false))
-  }
-
-  def testSpillingInLocalCluster(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
-
-    // reduceByKey - should spill ~8 times
-    val rddA = sc.parallelize(0 until 100000).map(i => (i/2, i))
-    val resultA = rddA.reduceByKey(math.max).collect()
-    assert(resultA.length == 50000)
-    resultA.foreach { case(k, v) =>
-      if (v != k * 2 + 1) {
-        fail(s"Value for ${k} was wrong: expected ${k * 2 + 1}, got ${v}")
-      }
-    }
-
-    // groupByKey - should spill ~17 times
-    val rddB = sc.parallelize(0 until 100000).map(i => (i/4, i))
-    val resultB = rddB.groupByKey().collect()
-    assert(resultB.length == 25000)
-    resultB.foreach { case(i, seq) =>
-      val expected = Set(i * 4, i * 4 + 1, i * 4 + 2, i * 4 + 3)
-      if (seq.toSet != expected) {
-        fail(s"Value for ${i} was wrong: expected ${expected}, got ${seq.toSet}")
-      }
-    }
-
-    // cogroup - should spill ~7 times
-    val rddC1 = sc.parallelize(0 until 10000).map(i => (i, i))
-    val rddC2 = sc.parallelize(0 until 10000).map(i => (i%1000, i))
-    val resultC = rddC1.cogroup(rddC2).collect()
-    assert(resultC.length == 10000)
-    resultC.foreach { case(i, (seq1, seq2)) =>
-      i match {
-        case 0 =>
-          assert(seq1.toSet == Set[Int](0))
-          assert(seq2.toSet == Set[Int](0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000))
-        case 1 =>
-          assert(seq1.toSet == Set[Int](1))
-          assert(seq2.toSet == Set[Int](1, 1001, 2001, 3001, 4001, 5001, 6001, 7001, 8001, 9001))
-        case 5000 =>
-          assert(seq1.toSet == Set[Int](5000))
-          assert(seq2.toSet == Set[Int]())
-        case 9999 =>
-          assert(seq1.toSet == Set[Int](9999))
-          assert(seq2.toSet == Set[Int]())
-        case _ =>
-      }
-    }
-
-    // larger cogroup - should spill ~7 times
-    val rddD1 = sc.parallelize(0 until 10000).map(i => (i/2, i))
-    val rddD2 = sc.parallelize(0 until 10000).map(i => (i/2, i))
-    val resultD = rddD1.cogroup(rddD2).collect()
-    assert(resultD.length == 5000)
-    resultD.foreach { case(i, (seq1, seq2)) =>
-      val expected = Set(i * 2, i * 2 + 1)
-      if (seq1.toSet != expected) {
-        fail(s"Value 1 for ${i} was wrong: expected ${expected}, got ${seq1.toSet}")
-      }
-      if (seq2.toSet != expected) {
-        fail(s"Value 2 for ${i} was wrong: expected ${expected}, got ${seq2.toSet}")
-      }
-    }
-
-    // sortByKey - should spill ~17 times
-    val rddE = sc.parallelize(0 until 100000).map(i => (i/4, i))
-    val resultE = rddE.sortByKey().collect().toSeq
-    assert(resultE === (0 until 100000).map(i => (i/4, i)).toSeq)
-  }
-
-  test("spilling in local cluster with many reduce tasks with kryo ser") {
-    spillingInLocalClusterWithManyReduceTasks(createSparkConf(true, true))
-  }
-
-  test("spilling in local cluster with many reduce tasks with java ser") {
-    spillingInLocalClusterWithManyReduceTasks(createSparkConf(true, false))
-  }
-
-  def spillingInLocalClusterWithManyReduceTasks(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local-cluster[2,1,1024]", "test", conf)
-
-    // reduceByKey - should spill ~4 times per executor
-    val rddA = sc.parallelize(0 until 100000).map(i => (i/2, i))
-    val resultA = rddA.reduceByKey(math.max _, 100).collect()
-    assert(resultA.length == 50000)
-    resultA.foreach { case(k, v) =>
-      if (v != k * 2 + 1) {
-        fail(s"Value for ${k} was wrong: expected ${k * 2 + 1}, got ${v}")
-      }
-    }
-
-    // groupByKey - should spill ~8 times per executor
-    val rddB = sc.parallelize(0 until 100000).map(i => (i/4, i))
-    val resultB = rddB.groupByKey(100).collect()
-    assert(resultB.length == 25000)
-    resultB.foreach { case(i, seq) =>
-      val expected = Set(i * 4, i * 4 + 1, i * 4 + 2, i * 4 + 3)
-      if (seq.toSet != expected) {
-        fail(s"Value for ${i} was wrong: expected ${expected}, got ${seq.toSet}")
-      }
-    }
-
-    // cogroup - should spill ~4 times per executor
-    val rddC1 = sc.parallelize(0 until 10000).map(i => (i, i))
-    val rddC2 = sc.parallelize(0 until 10000).map(i => (i%1000, i))
-    val resultC = rddC1.cogroup(rddC2, 100).collect()
-    assert(resultC.length == 10000)
-    resultC.foreach { case(i, (seq1, seq2)) =>
-      i match {
-        case 0 =>
-          assert(seq1.toSet == Set[Int](0))
-          assert(seq2.toSet == Set[Int](0, 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000))
-        case 1 =>
-          assert(seq1.toSet == Set[Int](1))
-          assert(seq2.toSet == Set[Int](1, 1001, 2001, 3001, 4001, 5001, 6001, 7001, 8001, 9001))
-        case 5000 =>
-          assert(seq1.toSet == Set[Int](5000))
-          assert(seq2.toSet == Set[Int]())
-        case 9999 =>
-          assert(seq1.toSet == Set[Int](9999))
-          assert(seq2.toSet == Set[Int]())
-        case _ =>
-      }
-    }
-
-    // larger cogroup - should spill ~4 times per executor
-    val rddD1 = sc.parallelize(0 until 10000).map(i => (i/2, i))
-    val rddD2 = sc.parallelize(0 until 10000).map(i => (i/2, i))
-    val resultD = rddD1.cogroup(rddD2).collect()
-    assert(resultD.length == 5000)
-    resultD.foreach { case(i, (seq1, seq2)) =>
-      val expected = Set(i * 2, i * 2 + 1)
-      if (seq1.toSet != expected) {
-        fail(s"Value 1 for ${i} was wrong: expected ${expected}, got ${seq1.toSet}")
-      }
-      if (seq2.toSet != expected) {
-        fail(s"Value 2 for ${i} was wrong: expected ${expected}, got ${seq2.toSet}")
-      }
-    }
-
-    // sortByKey - should spill ~8 times per executor
-    val rddE = sc.parallelize(0 until 100000).map(i => (i/4, i))
-    val resultE = rddE.sortByKey().collect().toSeq
-    assert(resultE === (0 until 100000).map(i => (i/4, i)).toSeq)
+  testWithMultipleSer("spilling in local cluster with many reduce tasks", loadDefaults = true) {
+    (conf: SparkConf) => testSpillingInLocalCluster(conf, 100)
   }
 
   test("cleanup of intermediate files in sorter") {
-    val conf = createSparkConf(true, false)  // Load defaults, otherwise SPARK_HOME is not found
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-    val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
-
-    val ord = implicitly[Ordering[Int]]
-
-    val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    sorter.insertAll((0 until 120000).iterator.map(i => (i, i)))
-    assert(diskBlockManager.getAllFiles().length > 0)
-    sorter.stop()
-    assert(diskBlockManager.getAllBlocks().length === 0)
-
-    val sorter2 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    sorter2.insertAll((0 until 120000).iterator.map(i => (i, i)))
-    assert(diskBlockManager.getAllFiles().length > 0)
-    assert(sorter2.iterator.toSet === (0 until 120000).map(i => (i, i)).toSet)
-    sorter2.stop()
-    assert(diskBlockManager.getAllBlocks().length === 0)
+    cleanupIntermediateFilesInSorter(withFailures = false)
   }
 
-  test("cleanup of intermediate files in sorter if there are errors") {
-    val conf = createSparkConf(true, false)  // Load defaults, otherwise SPARK_HOME is not found
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-    val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
-
-    val ord = implicitly[Ordering[Int]]
-
-    val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    intercept[SparkException] {
-      sorter.insertAll((0 until 120000).iterator.map(i => {
-        if (i == 119990) {
-          throw new SparkException("Intentional failure")
-        }
-        (i, i)
-      }))
-    }
-    assert(diskBlockManager.getAllFiles().length > 0)
-    sorter.stop()
-    assert(diskBlockManager.getAllBlocks().length === 0)
+  test("cleanup of intermediate files in sorter with failures") {
+    cleanupIntermediateFilesInSorter(withFailures = true)
   }
 
   test("cleanup of intermediate files in shuffle") {
-    val conf = createSparkConf(false, false)
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-    val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
-
-    val data = sc.parallelize(0 until 100000, 2).map(i => (i, i))
-    assert(data.reduceByKey(_ + _).count() === 100000)
-
-    // After the shuffle, there should be only 4 files on disk: our two map output files and
-    // their index files. All other intermediate files should've been deleted.
-    assert(diskBlockManager.getAllFiles().length === 4)
-  }
-
-  test("cleanup of intermediate files in shuffle with errors") {
-    val conf = createSparkConf(false, false)
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-    val diskBlockManager = SparkEnv.get.blockManager.diskBlockManager
-
-    val data = sc.parallelize(0 until 100000, 2).map(i => {
-      if (i == 99990) {
-        throw new Exception("Intentional failure")
-      }
-      (i, i)
-    })
-    intercept[SparkException] {
-      data.reduceByKey(_ + _).count()
-    }
-
-    // After the shuffle, there should be only 2 files on disk: the output of task 1 and its index.
-    // All other files (map 2's output and intermediate merge files) should've been deleted.
-    assert(diskBlockManager.getAllFiles().length === 2)
-  }
-
-  test("no partial aggregation or sorting with kryo ser") {
-    noPartialAggregationOrSorting(createSparkConf(false, true))
-  }
-
-  test("no partial aggregation or sorting with java ser") {
-    noPartialAggregationOrSorting(createSparkConf(false, false))
-  }
-
-  def noPartialAggregationOrSorting(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val sorter = new ExternalSorter[Int, Int, Int](None, Some(new HashPartitioner(3)), None, None)
-    sorter.insertAll((0 until 100000).iterator.map(i => (i / 4, i)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSet)}.toSet
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 100000).map(i => (i / 4, i)).filter(_._1 % 3 == p).toSet)
-    }).toSet
-    assert(results === expected)
-  }
-
-  test("partial aggregation without spill with kryo ser") {
-    partialAggregationWithoutSpill(createSparkConf(false, true))
-  }
-
-  test("partial aggregation without spill with java ser") {
-    partialAggregationWithoutSpill(createSparkConf(false, false))
-  }
-
-  def partialAggregationWithoutSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
-    val sorter = new ExternalSorter(Some(agg), Some(new HashPartitioner(3)), None, None)
-    sorter.insertAll((0 until 100).iterator.map(i => (i / 2, i)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSet)}.toSet
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 50).map(i => (i, i * 4 + 1)).filter(_._1 % 3 == p).toSet)
-    }).toSet
-    assert(results === expected)
+    cleanupIntermediateFilesInShuffle(withFailures = false)
   }
 
-  test("partial aggregation with spill, no ordering with kryo ser") {
-    partialAggregationWIthSpillNoOrdering(createSparkConf(false, true))
+  test("cleanup of intermediate files in shuffle with failures") {
+    cleanupIntermediateFilesInShuffle(withFailures = true)
   }
 
-  test("partial aggregation with spill, no ordering with java ser") {
-    partialAggregationWIthSpillNoOrdering(createSparkConf(false, false))
+  testWithMultipleSer("no sorting or partial aggregation") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = false, withOrdering = false, withSpilling = false)
   }
 
-  def partialAggregationWIthSpillNoOrdering(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
-    val sorter = new ExternalSorter(Some(agg), Some(new HashPartitioner(3)), None, None)
-    sorter.insertAll((0 until 100000).iterator.map(i => (i / 2, i)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSet)}.toSet
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 50000).map(i => (i, i * 4 + 1)).filter(_._1 % 3 == p).toSet)
-    }).toSet
-    assert(results === expected)
+  testWithMultipleSer("no sorting or partial aggregation with spilling") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = false, withOrdering = false, withSpilling = true)
   }
 
-  test("partial aggregation with spill, with ordering with kryo ser") {
-    partialAggregationWithSpillWithOrdering(createSparkConf(false, true))
+  testWithMultipleSer("sorting, no partial aggregation") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = false, withOrdering = true, withSpilling = false)
   }
 
-
-  test("partial aggregation with spill, with ordering with java ser") {
-    partialAggregationWithSpillWithOrdering(createSparkConf(false, false))
+  testWithMultipleSer("sorting, no partial aggregation with spilling") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = false, withOrdering = true, withSpilling = true)
   }
 
-  def partialAggregationWithSpillWithOrdering(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
-    val ord = implicitly[Ordering[Int]]
-    val sorter = new ExternalSorter(Some(agg), Some(new HashPartitioner(3)), Some(ord), None)
-
-    // avoid combine before spill
-    sorter.insertAll((0 until 50000).iterator.map(i => (i , 2 * i)))
-    sorter.insertAll((0 until 50000).iterator.map(i => (i, 2 * i + 1)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSet)}.toSet
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 50000).map(i => (i, i * 4 + 1)).filter(_._1 % 3 == p).toSet)
-    }).toSet
-    assert(results === expected)
+  testWithMultipleSer("partial aggregation, no sorting") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = true, withOrdering = false, withSpilling = false)
   }
 
-  test("sorting without aggregation, no spill with kryo ser") {
-    sortingWithoutAggregationNoSpill(createSparkConf(false, true))
+  testWithMultipleSer("partial aggregation, no sorting with spilling") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = true, withOrdering = false, withSpilling = true)
   }
 
-  test("sorting without aggregation, no spill with java ser") {
-    sortingWithoutAggregationNoSpill(createSparkConf(false, false))
+  testWithMultipleSer("partial aggregation and sorting") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = true, withOrdering = true, withSpilling = false)
   }
 
-  def sortingWithoutAggregationNoSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val ord = implicitly[Ordering[Int]]
-    val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    sorter.insertAll((0 until 100).iterator.map(i => (i, i)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSeq)}.toSeq
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 100).map(i => (i, i)).filter(_._1 % 3 == p).toSeq)
-    }).toSeq
-    assert(results === expected)
-  }
-
-  test("sorting without aggregation, with spill with kryo ser") {
-    sortingWithoutAggregationWithSpill(createSparkConf(false, true))
-  }
-
-  test("sorting without aggregation, with spill with java ser") {
-    sortingWithoutAggregationWithSpill(createSparkConf(false, false))
+  testWithMultipleSer("partial aggregation and sorting with spilling") { (conf: SparkConf) =>
+    basicSorterTest(conf, withPartialAgg = true, withOrdering = true, withSpilling = true)
   }
 
-  def sortingWithoutAggregationWithSpill(conf: SparkConf) {
-    conf.set("spark.shuffle.manager", "org.apache.spark.shuffle.sort.SortShuffleManager")
-    sc = new SparkContext("local", "test", conf)
-
-    val ord = implicitly[Ordering[Int]]
-    val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
-    sorter.insertAll((0 until 100000).iterator.map(i => (i, i)))
-    val results = sorter.partitionedIterator.map{case (p, vs) => (p, vs.toSeq)}.toSeq
-    val expected = (0 until 3).map(p => {
-      (p, (0 until 100000).map(i => (i, i)).filter(_._1 % 3 == p).toSeq)
-    }).toSeq
-    assert(results === expected)
-  }
+  testWithMultipleSer("sort without breaking sorting contracts", loadDefaults = true)(
+    sortWithoutBreakingSortingContracts)
 
   test("spilling with hash collisions") {
-    val conf = createSparkConf(true, false)
+    val size = 1000
+    val conf = createSparkConf(loadDefaults = true, kryo = false)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
     def mergeValue(buffer: ArrayBuffer[String], i: String): ArrayBuffer[String] = buffer += i
-    def mergeCombiners(buffer1: ArrayBuffer[String], buffer2: ArrayBuffer[String])
-      : ArrayBuffer[String] = buffer1 ++= buffer2
+    def mergeCombiners(
+        buffer1: ArrayBuffer[String],
+        buffer2: ArrayBuffer[String]): ArrayBuffer[String] = buffer1 ++= buffer2
 
     val agg = new Aggregator[String, String, ArrayBuffer[String]](
       createCombiner _, mergeValue _, mergeCombiners _)
@@ -574,10 +131,11 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       assert(w1.hashCode === w2.hashCode)
     }
 
-    val toInsert = (1 to 100000).iterator.map(_.toString).map(s => (s, s)) ++
+    val toInsert = (1 to size).iterator.map(_.toString).map(s => (s, s)) ++
       collisionPairs.iterator ++ collisionPairs.iterator.map(_.swap)
 
     sorter.insertAll(toInsert)
+    assert(sorter.numSpills > 0, "sorter did not spill")
 
     // A map of collision pairs in both directions
     val collisionPairsMap = (collisionPairs ++ collisionPairs.map(_.swap)).toMap
@@ -592,21 +150,21 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       assert(kv._2.equals(expectedValue))
       count += 1
     }
-    assert(count === 100000 + collisionPairs.size * 2)
+    assert(count === size + collisionPairs.size * 2)
   }
 
   test("spilling with many hash collisions") {
-    val conf = createSparkConf(true, false)
+    val size = 1000
+    val conf = createSparkConf(loadDefaults = true, kryo = false)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
-
     val agg = new Aggregator[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
     val sorter = new ExternalSorter[FixedHashObject, Int, Int](Some(agg), None, None, None)
-
     // Insert 10 copies each of lots of objects whose hash codes are either 0 or 1. This causes
     // problems if the map fails to group together the objects with the same code (SPARK-2043).
-    val toInsert = for (i <- 1 to 10; j <- 1 to 10000) yield (FixedHashObject(j, j % 2), 1)
+    val toInsert = for (i <- 1 to 10; j <- 1 to size) yield (FixedHashObject(j, j % 2), 1)
     sorter.insertAll(toInsert.iterator)
-
+    assert(sorter.numSpills > 0, "sorter did not spill")
     val it = sorter.iterator
     var count = 0
     while (it.hasNext) {
@@ -614,11 +172,13 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       assert(kv._2 === 10)
       count += 1
     }
-    assert(count === 10000)
+    assert(count === size)
   }
 
   test("spilling with hash collisions using the Int.MaxValue key") {
-    val conf = createSparkConf(true, false)
+    val size = 1000
+    val conf = createSparkConf(loadDefaults = true, kryo = false)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: Int): ArrayBuffer[Int] = ArrayBuffer[Int](i)
@@ -629,10 +189,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
     val agg = new Aggregator[Int, Int, ArrayBuffer[Int]](createCombiner, mergeValue, mergeCombiners)
     val sorter = new ExternalSorter[Int, Int, ArrayBuffer[Int]](Some(agg), None, None, None)
-
     sorter.insertAll(
-      (1 to 100000).iterator.map(i => (i, i)) ++ Iterator((Int.MaxValue, Int.MaxValue)))
-
+      (1 to size).iterator.map(i => (i, i)) ++ Iterator((Int.MaxValue, Int.MaxValue)))
+    assert(sorter.numSpills > 0, "sorter did not spill")
     val it = sorter.iterator
     while (it.hasNext) {
       // Should not throw NoSuchElementException
@@ -641,7 +200,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   test("spilling with null keys and values") {
-    val conf = createSparkConf(true, false)
+    val size = 1000
+    val conf = createSparkConf(loadDefaults = true, kryo = false)
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
@@ -655,12 +216,12 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val sorter = new ExternalSorter[String, String, ArrayBuffer[String]](
       Some(agg), None, None, None)
 
-    sorter.insertAll((1 to 100000).iterator.map(i => (i.toString, i.toString)) ++ Iterator(
+    sorter.insertAll((1 to size).iterator.map(i => (i.toString, i.toString)) ++ Iterator(
       (null.asInstanceOf[String], "1"),
       ("1", null.asInstanceOf[String]),
       (null.asInstanceOf[String], null.asInstanceOf[String])
     ))
-
+    assert(sorter.numSpills > 0, "sorter did not spill")
     val it = sorter.iterator
     while (it.hasNext) {
       // Should not throw NullPointerException
@@ -668,16 +229,301 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     }
   }
 
-  test("sort without breaking sorting contracts with kryo ser") {
-    sortWithoutBreakingSortingContracts(createSparkConf(true, true))
+  /* ============================= *
+   |  Helper test utility methods  |
+   * ============================= */
+
+  private def createSparkConf(loadDefaults: Boolean, kryo: Boolean): SparkConf = {
+    val conf = new SparkConf(loadDefaults)
+    if (kryo) {
+      conf.set("spark.serializer", classOf[KryoSerializer].getName)
+    } else {
+      // Make the Java serializer write a reset instruction (TC_RESET) after each object to test
+      // for a bug we had with bytes written past the last object in a batch (SPARK-2792)
+      conf.set("spark.serializer.objectStreamReset", "1")
+      conf.set("spark.serializer", classOf[JavaSerializer].getName)
+    }
+    conf.set("spark.shuffle.sort.bypassMergeThreshold", "0")
+    // Ensure that we actually have multiple batches per spill file
+    conf.set("spark.shuffle.spill.batchSize", "10")
+    conf.set("spark.shuffle.spill.initialMemoryThreshold", "512")
+    conf
+  }
+
+  /**
+   * Run a test multiple times, each time with a different serializer.
+   */
+  private def testWithMultipleSer(
+      name: String,
+      loadDefaults: Boolean = false)(body: (SparkConf => Unit)): Unit = {
+    test(name + " with kryo ser") {
+      body(createSparkConf(loadDefaults, kryo = true))
+    }
+    test(name + " with java ser") {
+      body(createSparkConf(loadDefaults, kryo = false))
+    }
   }
 
-  test("sort without breaking sorting contracts with java ser") {
-    sortWithoutBreakingSortingContracts(createSparkConf(true, false))
+  /* =========================================== *
+   |  Helper methods that contain the test body  |
+   * =========================================== */
+
+  private def emptyDataStream(conf: SparkConf) {
+    conf.set("spark.shuffle.manager", "sort")
+    sc = new SparkContext("local", "test", conf)
+
+    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
+    val ord = implicitly[Ordering[Int]]
+
+    // Both aggregator and ordering
+    val sorter = new ExternalSorter[Int, Int, Int](
+      Some(agg), Some(new HashPartitioner(3)), Some(ord), None)
+    assert(sorter.iterator.toSeq === Seq())
+    sorter.stop()
+
+    // Only aggregator
+    val sorter2 = new ExternalSorter[Int, Int, Int](
+      Some(agg), Some(new HashPartitioner(3)), None, None)
+    assert(sorter2.iterator.toSeq === Seq())
+    sorter2.stop()
+
+    // Only ordering
+    val sorter3 = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(3)), Some(ord), None)
+    assert(sorter3.iterator.toSeq === Seq())
+    sorter3.stop()
+
+    // Neither aggregator nor ordering
+    val sorter4 = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(3)), None, None)
+    assert(sorter4.iterator.toSeq === Seq())
+    sorter4.stop()
+  }
+
+  private def fewElementsPerPartition(conf: SparkConf) {
+    conf.set("spark.shuffle.manager", "sort")
+    sc = new SparkContext("local", "test", conf)
+
+    val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
+    val ord = implicitly[Ordering[Int]]
+    val elements = Set((1, 1), (2, 2), (5, 5))
+    val expected = Set(
+      (0, Set()), (1, Set((1, 1))), (2, Set((2, 2))), (3, Set()), (4, Set()),
+      (5, Set((5, 5))), (6, Set()))
+
+    // Both aggregator and ordering
+    val sorter = new ExternalSorter[Int, Int, Int](
+      Some(agg), Some(new HashPartitioner(7)), Some(ord), None)
+    sorter.insertAll(elements.iterator)
+    assert(sorter.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
+    sorter.stop()
+
+    // Only aggregator
+    val sorter2 = new ExternalSorter[Int, Int, Int](
+      Some(agg), Some(new HashPartitioner(7)), None, None)
+    sorter2.insertAll(elements.iterator)
+    assert(sorter2.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
+    sorter2.stop()
+
+    // Only ordering
+    val sorter3 = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(7)), Some(ord), None)
+    sorter3.insertAll(elements.iterator)
+    assert(sorter3.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
+    sorter3.stop()
+
+    // Neither aggregator nor ordering
+    val sorter4 = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(7)), None, None)
+    sorter4.insertAll(elements.iterator)
+    assert(sorter4.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
+    sorter4.stop()
+  }
+
+  private def emptyPartitionsWithSpilling(conf: SparkConf) {
+    val size = 1000
+    conf.set("spark.shuffle.manager", "sort")
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
+    sc = new SparkContext("local", "test", conf)
+
+    val ord = implicitly[Ordering[Int]]
+    val elements = Iterator((1, 1), (5, 5)) ++ (0 until size).iterator.map(x => (2, 2))
+
+    val sorter = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(7)), Some(ord), None)
+    sorter.insertAll(elements)
+    assert(sorter.numSpills > 0, "sorter did not spill")
+    val iter = sorter.partitionedIterator.map(p => (p._1, p._2.toList))
+    assert(iter.next() === (0, Nil))
+    assert(iter.next() === (1, List((1, 1))))
+    assert(iter.next() === (2, (0 until 1000).map(x => (2, 2)).toList))
+    assert(iter.next() === (3, Nil))
+    assert(iter.next() === (4, Nil))
+    assert(iter.next() === (5, List((5, 5))))
+    assert(iter.next() === (6, Nil))
+    sorter.stop()
+  }
+
+  private def testSpillingInLocalCluster(conf: SparkConf, numReduceTasks: Int) {
+    val size = 5000
+    conf.set("spark.shuffle.manager", "sort")
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 4).toString)
+    sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
+
+    assertSpilled(sc, "reduceByKey") {
+      val result = sc.parallelize(0 until size)
+        .map { i => (i / 2, i) }
+        .reduceByKey(math.max _, numReduceTasks)
+        .collect()
+      assert(result.length === size / 2)
+      result.foreach { case (k, v) =>
+        val expected = k * 2 + 1
+        assert(v === expected, s"Value for $k was wrong: expected $expected, got $v")
+      }
+    }
+
+    assertSpilled(sc, "groupByKey") {
+      val result = sc.parallelize(0 until size)
+        .map { i => (i / 2, i) }
+        .groupByKey(numReduceTasks)
+        .collect()
+      assert(result.length == size / 2)
+      result.foreach { case (i, seq) =>
+        val actual = seq.toSet
+        val expected = Set(i * 2, i * 2 + 1)
+        assert(actual === expected, s"Value for $i was wrong: expected $expected, got $actual")
+      }
+    }
+
+    assertSpilled(sc, "cogroup") {
+      val rdd1 = sc.parallelize(0 until size).map { i => (i / 2, i) }
+      val rdd2 = sc.parallelize(0 until size).map { i => (i / 2, i) }
+      val result = rdd1.cogroup(rdd2, numReduceTasks).collect()
+      assert(result.length === size / 2)
+      result.foreach { case (i, (seq1, seq2)) =>
+        val actual1 = seq1.toSet
+        val actual2 = seq2.toSet
+        val expected = Set(i * 2, i * 2 + 1)
+        assert(actual1 === expected, s"Value 1 for $i was wrong: expected $expected, got $actual1")
+        assert(actual2 === expected, s"Value 2 for $i was wrong: expected $expected, got $actual2")
+      }
+    }
+
+    assertSpilled(sc, "sortByKey") {
+      val result = sc.parallelize(0 until size)
+        .map { i => (i / 2, i) }
+        .sortByKey(numPartitions = numReduceTasks)
+        .collect()
+      val expected = (0 until size).map { i => (i / 2, i) }.toArray
+      assert(result.length === size)
+      result.zipWithIndex.foreach { case ((k, _), i) =>
+        val (expectedKey, _) = expected(i)
+        assert(k === expectedKey, s"Value for $i was wrong: expected $expectedKey, got $k")
+      }
+    }
+  }
+
+  private def cleanupIntermediateFilesInSorter(withFailures: Boolean): Unit = {
+    val size = 1200
+    val conf = createSparkConf(loadDefaults = false, kryo = false)
+    conf.set("spark.shuffle.manager", "sort")
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 4).toString)
+    sc = new SparkContext("local", "test", conf)
+    val diskBlockManager = sc.env.blockManager.diskBlockManager
+    val ord = implicitly[Ordering[Int]]
+    val expectedSize = if (withFailures) size - 1 else size
+    val sorter = new ExternalSorter[Int, Int, Int](
+      None, Some(new HashPartitioner(3)), Some(ord), None)
+    if (withFailures) {
+      intercept[SparkException] {
+        sorter.insertAll((0 until size).iterator.map { i =>
+          if (i == size - 1) { throw new SparkException("intentional failure") }
+          (i, i)
+        })
+      }
+    } else {
+      sorter.insertAll((0 until size).iterator.map(i => (i, i)))
+    }
+    assert(sorter.iterator.toSet === (0 until expectedSize).map(i => (i, i)).toSet)
+    assert(sorter.numSpills > 0, "sorter did not spill")
+    assert(diskBlockManager.getAllFiles().nonEmpty, "sorter did not spill")
+    sorter.stop()
+    assert(diskBlockManager.getAllFiles().isEmpty, "spilled files were not cleaned up")
+  }
+
+  private def cleanupIntermediateFilesInShuffle(withFailures: Boolean): Unit = {
+    val size = 1200
+    val conf = createSparkConf(loadDefaults = false, kryo = false)
+    conf.set("spark.shuffle.manager", "sort")
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 4).toString)
+    sc = new SparkContext("local", "test", conf)
+    val diskBlockManager = sc.env.blockManager.diskBlockManager
+    val data = sc.parallelize(0 until size, 2).map { i =>
+      if (withFailures && i == size - 1) {
+        throw new SparkException("intentional failure")
+      }
+      (i, i)
+    }
+
+    assertSpilled(sc, "test shuffle cleanup") {
+      if (withFailures) {
+        intercept[SparkException] {
+          data.reduceByKey(_ + _).count()
+        }
+        // After the shuffle, there should be only 2 files on disk: the output of task 1 and
+        // its index. All other files (map 2's output and intermediate merge files) should
+        // have been deleted.
+        assert(diskBlockManager.getAllFiles().length === 2)
+      } else {
+        assert(data.reduceByKey(_ + _).count() === size)
+        // After the shuffle, there should be only 4 files on disk: the output of both tasks
+        // and their indices. All intermediate merge files should have been deleted.
+        assert(diskBlockManager.getAllFiles().length === 4)
+      }
+    }
+  }
+
+  private def basicSorterTest(
+      conf: SparkConf,
+      withPartialAgg: Boolean,
+      withOrdering: Boolean,
+      withSpilling: Boolean) {
+    val size = 1000
+    if (withSpilling) {
+      conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
+    }
+    conf.set("spark.shuffle.manager", "sort")
+    sc = new SparkContext("local", "test", conf)
+    val agg =
+      if (withPartialAgg) {
+        Some(new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j))
+      } else {
+        None
+      }
+    val ord = if (withOrdering) Some(implicitly[Ordering[Int]]) else None
+    val sorter = new ExternalSorter[Int, Int, Int](agg, Some(new HashPartitioner(3)), ord, None)
+    sorter.insertAll((0 until size).iterator.map { i => (i / 4, i) })
+    if (withSpilling) {
+      assert(sorter.numSpills > 0, "sorter did not spill")
+    } else {
+      assert(sorter.numSpills === 0, "sorter spilled")
+    }
+    val results = sorter.partitionedIterator.map { case (p, vs) => (p, vs.toSet) }.toSet
+    val expected = (0 until 3).map { p =>
+      var v = (0 until size).map { i => (i / 4, i) }.filter { case (k, _) => k % 3 == p }.toSet
+      if (withPartialAgg) {
+        v = v.groupBy(_._1).mapValues { s => s.map(_._2).sum }.toSet
+      }
+      (p, v.toSet)
+    }.toSet
+    assert(results === expected)
   }
 
   private def sortWithoutBreakingSortingContracts(conf: SparkConf) {
+    val size = 100000
+    val conf = createSparkConf(loadDefaults = true, kryo = false)
     conf.set("spark.shuffle.manager", "sort")
+    conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
 
     // Using wrongOrdering to show integer overflow introduced exception.
@@ -690,17 +536,18 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       }
     }
 
-    val testData = Array.tabulate(100000) { _ => rand.nextInt().toString }
+    val testData = Array.tabulate(size) { _ => rand.nextInt().toString }
 
     val sorter1 = new ExternalSorter[String, String, String](
       None, None, Some(wrongOrdering), None)
     val thrown = intercept[IllegalArgumentException] {
       sorter1.insertAll(testData.iterator.map(i => (i, i)))
+      assert(sorter1.numSpills > 0, "sorter did not spill")
       sorter1.iterator
     }
 
-    assert(thrown.getClass() === classOf[IllegalArgumentException])
-    assert(thrown.getMessage().contains("Comparison method violates its general contract"))
+    assert(thrown.getClass === classOf[IllegalArgumentException])
+    assert(thrown.getMessage.contains("Comparison method violates its general contract"))
     sorter1.stop()
 
     // Using aggregation and external spill to make sure ExternalSorter using
@@ -716,6 +563,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val sorter2 = new ExternalSorter[String, String, ArrayBuffer[String]](
       Some(agg), None, None, None)
     sorter2.insertAll(testData.iterator.map(i => (i, i)))
+    assert(sorter2.numSpills > 0, "sorter did not spill")
 
     // To validate the hash ordering of key
     var minKey = Int.MinValue
@@ -729,12 +577,23 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   }
 
   test("sorting updates peak execution memory") {
+    val spillThreshold = 1000
     val conf = createSparkConf(loadDefaults = false, kryo = false)
       .set("spark.shuffle.manager", "sort")
+      .set("spark.shuffle.spill.numElementsForceSpillThreshold", spillThreshold.toString)
     sc = new SparkContext("local", "test", conf)
     // Avoid aggregating here to make sure we're not also using ExternalAppendOnlyMap
-    AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external sorter") {
-      sc.parallelize(1 to 1000, 2).repartition(100).count()
+    // No spilling
+    AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external sorter without spilling") {
+      assertNotSpilled(sc, "verify peak memory") {
+        sc.parallelize(1 to spillThreshold / 2, 2).repartition(100).count()
+      }
+    }
+    // With spilling
+    AccumulatorSuite.verifyPeakExecutionMemorySet(sc, "external sorter with spilling") {
+      assertSpilled(sc, "verify peak memory") {
+        sc.parallelize(1 to spillThreshold * 3, 2).repartition(100).count()
+      }
     }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
index 835f52fa566a..c4358f409b6e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
@@ -68,6 +68,8 @@ private class GrantEverythingMemoryManager extends MemoryManager {
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
+  override def releaseExecutionMemory(numBytes: Long): Unit = { }
+  override def releaseStorageMemory(numBytes: Long): Unit = { }
   override def maxExecutionMemory: Long = Long.MaxValue
   override def maxStorageMemory: Long = Long.MaxValue
 }

From 6a2359ff1f7ad2233af2c530313d6ec2ecf70d19 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 15 Oct 2015 14:50:58 -0700
Subject: [PATCH 254/896] [SPARK-10412] [SQL] report memory usage for tungsten
 sql physical operator

https://issues.apache.org/jira/browse/SPARK-10412

some screenshots:
### aggregate:
![screen shot 2015-10-12 at 2 23 11 pm](https://cloud.githubusercontent.com/assets/3182036/10439534/618320a4-70ef-11e5-94d8-62ea7f2d1531.png)

### join
![screen shot 2015-10-12 at 2 23 29 pm](https://cloud.githubusercontent.com/assets/3182036/10439537/6724797c-70ef-11e5-8f75-0cf5cbd42048.png)

Author: Wenchen Fan <wenchen@databricks.com>
Author: Wenchen Fan <cloud0fan@163.com>

Closes #8931 from cloud-fan/viz.
---
 .../aggregate/TungstenAggregate.scala         | 10 ++-
 .../TungstenAggregationIterator.scala         | 10 ++-
 .../sql/execution/metric/SQLMetrics.scala     | 72 +++++++++++++------
 .../org/apache/spark/sql/execution/sort.scala | 16 +++++
 .../sql/execution/ui/ExecutionPage.scala      |  2 +-
 .../spark/sql/execution/ui/SQLListener.scala  |  9 ++-
 .../sql/execution/ui/SparkPlanGraph.scala     |  4 +-
 .../TungstenAggregationIteratorSuite.scala    |  3 +-
 .../execution/metric/SQLMetricsSuite.scala    | 13 +++-
 .../sql/execution/ui/SQLListenerSuite.scala   | 20 +++---
 10 files changed, 116 insertions(+), 43 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index c342940e6e75..0d3a4b36c161 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -49,7 +49,9 @@ case class TungstenAggregate(
 
   override private[sql] lazy val metrics = Map(
     "numInputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of input rows"),
-    "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"))
+    "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"),
+    "dataSize" -> SQLMetrics.createSizeMetric(sparkContext, "data size"),
+    "spillSize" -> SQLMetrics.createSizeMetric(sparkContext, "spill size"))
 
   override def outputsUnsafeRows: Boolean = true
 
@@ -79,6 +81,8 @@ case class TungstenAggregate(
   protected override def doExecute(): RDD[InternalRow] = attachTree(this, "execute") {
     val numInputRows = longMetric("numInputRows")
     val numOutputRows = longMetric("numOutputRows")
+    val dataSize = longMetric("dataSize")
+    val spillSize = longMetric("spillSize")
 
     /**
      * Set up the underlying unsafe data structures used before computing the parent partition.
@@ -97,7 +101,9 @@ case class TungstenAggregate(
         child.output,
         testFallbackStartsAt,
         numInputRows,
-        numOutputRows)
+        numOutputRows,
+        dataSize,
+        spillSize)
     }
 
     /** Compute a partition using the iterator already set up previously. */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index fe708a5f71f7..7cd0f7b81e46 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -87,7 +87,9 @@ class TungstenAggregationIterator(
     originalInputAttributes: Seq[Attribute],
     testFallbackStartsAt: Option[Int],
     numInputRows: LongSQLMetric,
-    numOutputRows: LongSQLMetric)
+    numOutputRows: LongSQLMetric,
+    dataSize: LongSQLMetric,
+    spillSize: LongSQLMetric)
   extends Iterator[UnsafeRow] with Logging {
 
   // The parent partition iterator, to be initialized later in `start`
@@ -110,6 +112,10 @@ class TungstenAggregationIterator(
       s"$allAggregateExpressions should have no more than 2 kinds of modes.")
   }
 
+  // Remember spill data size of this task before execute this operator so that we can
+  // figure out how many bytes we spilled for this operator.
+  private val spillSizeBefore = TaskContext.get().taskMetrics().memoryBytesSpilled
+
   //
   // The modes of AggregateExpressions. Right now, we can handle the following mode:
   //  - Partial-only:
@@ -842,6 +848,8 @@ class TungstenAggregationIterator(
         val mapMemory = hashMap.getPeakMemoryUsedBytes
         val sorterMemory = Option(externalSorter).map(_.getPeakMemoryUsedBytes).getOrElse(0L)
         val peakMemory = Math.max(mapMemory, sorterMemory)
+        dataSize += peakMemory
+        spillSize += TaskContext.get().taskMetrics().memoryBytesSpilled - spillSizeBefore
         TaskContext.get().internalMetricsToAccumulators(
           InternalAccumulator.PEAK_EXECUTION_MEMORY).add(peakMemory)
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
index 7a2a98ec18cb..075b7ad88111 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.execution.metric
 
+import org.apache.spark.util.Utils
 import org.apache.spark.{Accumulable, AccumulableParam, SparkContext}
 
 /**
@@ -35,6 +36,12 @@ private[sql] abstract class SQLMetric[R <: SQLMetricValue[T], T](
  */
 private[sql] trait SQLMetricParam[R <: SQLMetricValue[T], T] extends AccumulableParam[R, T] {
 
+  /**
+   * A function that defines how we aggregate the final accumulator results among all tasks,
+   * and represent it in string for a SQL physical operator.
+   */
+  val stringValue: Seq[T] => String
+
   def zero: R
 }
 
@@ -63,26 +70,12 @@ private[sql] class LongSQLMetricValue(private var _value : Long) extends SQLMetr
   override def value: Long = _value
 }
 
-/**
- * A wrapper of Int to avoid boxing and unboxing when using Accumulator
- */
-private[sql] class IntSQLMetricValue(private var _value: Int) extends SQLMetricValue[Int] {
-
-  def add(term: Int): IntSQLMetricValue = {
-    _value += term
-    this
-  }
-
-  // Although there is a boxing here, it's fine because it's only called in SQLListener
-  override def value: Int = _value
-}
-
 /**
  * A specialized long Accumulable to avoid boxing and unboxing when using Accumulator's
  * `+=` and `add`.
  */
-private[sql] class LongSQLMetric private[metric](name: String)
-  extends SQLMetric[LongSQLMetricValue, Long](name, LongSQLMetricParam) {
+private[sql] class LongSQLMetric private[metric](name: String, param: LongSQLMetricParam)
+  extends SQLMetric[LongSQLMetricValue, Long](name, param) {
 
   override def +=(term: Long): Unit = {
     localValue.add(term)
@@ -93,7 +86,8 @@ private[sql] class LongSQLMetric private[metric](name: String)
   }
 }
 
-private object LongSQLMetricParam extends SQLMetricParam[LongSQLMetricValue, Long] {
+private class LongSQLMetricParam(val stringValue: Seq[Long] => String, initialValue: Long)
+  extends SQLMetricParam[LongSQLMetricValue, Long] {
 
   override def addAccumulator(r: LongSQLMetricValue, t: Long): LongSQLMetricValue = r.add(t)
 
@@ -102,20 +96,56 @@ private object LongSQLMetricParam extends SQLMetricParam[LongSQLMetricValue, Lon
 
   override def zero(initialValue: LongSQLMetricValue): LongSQLMetricValue = zero
 
-  override def zero: LongSQLMetricValue = new LongSQLMetricValue(0L)
+  override def zero: LongSQLMetricValue = new LongSQLMetricValue(initialValue)
 }
 
 private[sql] object SQLMetrics {
 
-  def createLongMetric(sc: SparkContext, name: String): LongSQLMetric = {
-    val acc = new LongSQLMetric(name)
+  private def createLongMetric(
+      sc: SparkContext,
+      name: String,
+      stringValue: Seq[Long] => String,
+      initialValue: Long): LongSQLMetric = {
+    val param = new LongSQLMetricParam(stringValue, initialValue)
+    val acc = new LongSQLMetric(name, param)
     sc.cleaner.foreach(_.registerAccumulatorForCleanup(acc))
     acc
   }
 
+  def createLongMetric(sc: SparkContext, name: String): LongSQLMetric = {
+    createLongMetric(sc, name, _.sum.toString, 0L)
+  }
+
+  /**
+   * Create a metric to report the size information (including total, min, med, max) like data size,
+   * spill size, etc.
+   */
+  def createSizeMetric(sc: SparkContext, name: String): LongSQLMetric = {
+    val stringValue = (values: Seq[Long]) => {
+      // This is a workaround for SPARK-11013.
+      // We use -1 as initial value of the accumulator, if the accumulator is valid, we will update
+      // it at the end of task and the value will be at least 0.
+      val validValues = values.filter(_ >= 0)
+      val Seq(sum, min, med, max) = {
+        val metric = if (validValues.length == 0) {
+          Seq.fill(4)(0L)
+        } else {
+          val sorted = validValues.sorted
+          Seq(sorted.sum, sorted(0), sorted(validValues.length / 2), sorted(validValues.length - 1))
+        }
+        metric.map(Utils.bytesToString)
+      }
+      s"\n$sum ($min, $med, $max)"
+    }
+    // The final result of this metric in physical operator UI may looks like:
+    // data size total (min, med, max):
+    // 100GB (100MB, 1GB, 10GB)
+    createLongMetric(sc, s"$name total (min, med, max)", stringValue, -1L)
+  }
+
   /**
    * A metric that its value will be ignored. Use this one when we need a metric parameter but don't
    * care about the value.
    */
-  val nullLongMetric = new LongSQLMetric("null")
+  val nullLongMetric = new LongSQLMetric("null", new LongSQLMetricParam(_.sum.toString, 0L))
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index 27f26245a5ef..9385e5734db5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -22,6 +22,7 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical.{Distribution, OrderedDistribution, UnspecifiedDistribution}
+import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.sql.types.StructType
 import org.apache.spark.util.CompletionIterator
 import org.apache.spark.util.collection.ExternalSorter
@@ -93,10 +94,17 @@ case class TungstenSort(
   override def requiredChildDistribution: Seq[Distribution] =
     if (global) OrderedDistribution(sortOrder) :: Nil else UnspecifiedDistribution :: Nil
 
+  override private[sql] lazy val metrics = Map(
+    "dataSize" -> SQLMetrics.createSizeMetric(sparkContext, "data size"),
+    "spillSize" -> SQLMetrics.createSizeMetric(sparkContext, "spill size"))
+
   protected override def doExecute(): RDD[InternalRow] = {
     val schema = child.schema
     val childOutput = child.output
 
+    val dataSize = longMetric("dataSize")
+    val spillSize = longMetric("spillSize")
+
     /**
      * Set up the sorter in each partition before computing the parent partition.
      * This makes sure our sorter is not starved by other sorters used in the same task.
@@ -131,7 +139,15 @@ case class TungstenSort(
         partitionIndex: Int,
         sorter: UnsafeExternalRowSorter,
         parentIterator: Iterator[InternalRow]): Iterator[InternalRow] = {
+      // Remember spill data size of this task before execute this operator so that we can
+      // figure out how many bytes we spilled for this operator.
+      val spillSizeBefore = TaskContext.get().taskMetrics().memoryBytesSpilled
+
       val sortedIterator = sorter.sort(parentIterator.asInstanceOf[Iterator[UnsafeRow]])
+
+      dataSize += sorter.getPeakMemoryUsage
+      spillSize += TaskContext.get().taskMetrics().memoryBytesSpilled - spillSizeBefore
+
       taskContext.internalMetricsToAccumulators(
         InternalAccumulator.PEAK_EXECUTION_MEMORY).add(sorter.getPeakMemoryUsage)
       sortedIterator
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/ExecutionPage.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/ExecutionPage.scala
index a4dbd2e1978d..e74d6fb396e1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/ExecutionPage.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/ExecutionPage.scala
@@ -100,7 +100,7 @@ private[sql] class ExecutionPage(parent: SQLTab) extends WebUIPage("execution")
     // scalastyle:on
   }
 
-  private def planVisualization(metrics: Map[Long, Any], graph: SparkPlanGraph): Seq[Node] = {
+  private def planVisualization(metrics: Map[Long, String], graph: SparkPlanGraph): Seq[Node] = {
     val metadata = graph.nodes.flatMap { node =>
       val nodeId = s"plan-meta-data-${node.id}"
       <div id={nodeId}>{node.desc}</div>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
index d6472400a6a2..b302b519998a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
@@ -252,7 +252,7 @@ private[sql] class SQLListener(conf: SparkConf) extends SparkListener with Loggi
   /**
    * Get all accumulator updates from all tasks which belong to this execution and merge them.
    */
-  def getExecutionMetrics(executionId: Long): Map[Long, Any] = synchronized {
+  def getExecutionMetrics(executionId: Long): Map[Long, String] = synchronized {
     _executionIdToData.get(executionId) match {
       case Some(executionUIData) =>
         val accumulatorUpdates = {
@@ -264,8 +264,7 @@ private[sql] class SQLListener(conf: SparkConf) extends SparkListener with Loggi
           }
         }.filter { case (id, _) => executionUIData.accumulatorMetrics.contains(id) }
         mergeAccumulatorUpdates(accumulatorUpdates, accumulatorId =>
-          executionUIData.accumulatorMetrics(accumulatorId).metricParam).
-          mapValues(_.asInstanceOf[SQLMetricValue[_]].value)
+          executionUIData.accumulatorMetrics(accumulatorId).metricParam)
       case None =>
         // This execution has been dropped
         Map.empty
@@ -274,11 +273,11 @@ private[sql] class SQLListener(conf: SparkConf) extends SparkListener with Loggi
 
   private def mergeAccumulatorUpdates(
       accumulatorUpdates: Seq[(Long, Any)],
-      paramFunc: Long => SQLMetricParam[SQLMetricValue[Any], Any]): Map[Long, Any] = {
+      paramFunc: Long => SQLMetricParam[SQLMetricValue[Any], Any]): Map[Long, String] = {
     accumulatorUpdates.groupBy(_._1).map { case (accumulatorId, values) =>
       val param = paramFunc(accumulatorId)
       (accumulatorId,
-        values.map(_._2.asInstanceOf[SQLMetricValue[Any]]).foldLeft(param.zero)(param.addInPlace))
+        param.stringValue(values.map(_._2.asInstanceOf[SQLMetricValue[Any]].value)))
     }
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SparkPlanGraph.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SparkPlanGraph.scala
index ae3d752dde34..f1fce5478a3f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SparkPlanGraph.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SparkPlanGraph.scala
@@ -33,7 +33,7 @@ import org.apache.spark.sql.execution.metric.{SQLMetricParam, SQLMetricValue}
 private[ui] case class SparkPlanGraph(
     nodes: Seq[SparkPlanGraphNode], edges: Seq[SparkPlanGraphEdge]) {
 
-  def makeDotFile(metrics: Map[Long, Any]): String = {
+  def makeDotFile(metrics: Map[Long, String]): String = {
     val dotFile = new StringBuilder
     dotFile.append("digraph G {\n")
     nodes.foreach(node => dotFile.append(node.makeDotNode(metrics) + "\n"))
@@ -87,7 +87,7 @@ private[sql] object SparkPlanGraph {
 private[ui] case class SparkPlanGraphNode(
     id: Long, name: String, desc: String, metrics: Seq[SQLPlanMetric]) {
 
-  def makeDotNode(metricsValue: Map[Long, Any]): String = {
+  def makeDotNode(metricsValue: Map[Long, String]): String = {
     val values = {
       for (metric <- metrics;
            value <- metricsValue.get(metric.accumulatorId)) yield {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
index 0cc4988ff681..cc0ac1b07c21 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
@@ -39,7 +39,8 @@ class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLConte
       }
       val dummyAccum = SQLMetrics.createLongMetric(sparkContext, "dummy")
       iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty, Seq.empty, Seq.empty,
-        0, Seq.empty, newMutableProjection, Seq.empty, None, dummyAccum, dummyAccum)
+        0, Seq.empty, newMutableProjection, Seq.empty, None,
+        dummyAccum, dummyAccum, dummyAccum, dummyAccum)
       val numPages = iter.getHashMap.getNumDataPages
       assert(numPages === 1)
     } finally {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index 6afffae161ef..cdd885ba1420 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -93,7 +93,16 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
         }.toMap
         (node.id, node.name -> nodeMetrics)
       }.toMap
-      assert(expectedMetrics === actualMetrics)
+
+      assert(expectedMetrics.keySet === actualMetrics.keySet)
+      for (nodeId <- expectedMetrics.keySet) {
+        val (expectedNodeName, expectedMetricsMap) = expectedMetrics(nodeId)
+        val (actualNodeName, actualMetricsMap) = actualMetrics(nodeId)
+        assert(expectedNodeName === actualNodeName)
+        for (metricName <- expectedMetricsMap.keySet) {
+          assert(expectedMetricsMap(metricName).toString === actualMetricsMap(metricName))
+        }
+      }
     } else {
       // TODO Remove this "else" once we fix the race condition that missing the JobStarted event.
       // Since we cannot track all jobs, the metric values could be wrong and we should not check
@@ -489,7 +498,7 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
       val metricValues = sqlContext.listener.getExecutionMetrics(executionId)
       // Because "save" will create a new DataFrame internally, we cannot get the real metric id.
       // However, we still can check the value.
-      assert(metricValues.values.toSeq === Seq(2L))
+      assert(metricValues.values.toSeq === Seq("2"))
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
index 727cf3665a87..cc1c1e10e98c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
@@ -74,6 +74,10 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("basic") {
+    def checkAnswer(actual: Map[Long, String], expected: Map[Long, Long]): Unit = {
+      assert(actual === expected.mapValues(_.toString))
+    }
+
     val listener = new SQLListener(sqlContext.sparkContext.conf)
     val executionId = 0
     val df = createTestDataFrame
@@ -114,7 +118,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       (1L, 0, 0, createTaskMetrics(accumulatorUpdates))
     )))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 2))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 2))
 
     listener.onExecutorMetricsUpdate(SparkListenerExecutorMetricsUpdate("", Seq(
       // (task id, stage id, stage attempt, metrics)
@@ -122,7 +126,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       (1L, 0, 0, createTaskMetrics(accumulatorUpdates.mapValues(_ * 2)))
     )))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 3))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 3))
 
     // Retrying a stage should reset the metrics
     listener.onStageSubmitted(SparkListenerStageSubmitted(createStageInfo(0, 1)))
@@ -133,7 +137,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       (1L, 0, 1, createTaskMetrics(accumulatorUpdates))
     )))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 2))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 2))
 
     // Ignore the task end for the first attempt
     listener.onTaskEnd(SparkListenerTaskEnd(
@@ -144,7 +148,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       createTaskInfo(0, 0),
       createTaskMetrics(accumulatorUpdates.mapValues(_ * 100))))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 2))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 2))
 
     // Finish two tasks
     listener.onTaskEnd(SparkListenerTaskEnd(
@@ -162,7 +166,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       createTaskInfo(1, 0),
       createTaskMetrics(accumulatorUpdates.mapValues(_ * 3))))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 5))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 5))
 
     // Summit a new stage
     listener.onStageSubmitted(SparkListenerStageSubmitted(createStageInfo(1, 0)))
@@ -173,7 +177,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       (1L, 1, 0, createTaskMetrics(accumulatorUpdates))
     )))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 7))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 7))
 
     // Finish two tasks
     listener.onTaskEnd(SparkListenerTaskEnd(
@@ -191,7 +195,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       createTaskInfo(1, 0),
       createTaskMetrics(accumulatorUpdates.mapValues(_ * 3))))
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 11))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 11))
 
     assert(executionUIData.runningJobs === Seq(0))
     assert(executionUIData.succeededJobs.isEmpty)
@@ -208,7 +212,7 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
     assert(executionUIData.succeededJobs === Seq(0))
     assert(executionUIData.failedJobs.isEmpty)
 
-    assert(listener.getExecutionMetrics(0) === accumulatorUpdates.mapValues(_ * 11))
+    checkAnswer(listener.getExecutionMetrics(0), accumulatorUpdates.mapValues(_ * 11))
   }
 
   test("onExecutionEnd happens before onJobEnd(JobSucceeded)") {

From eb0b4d6e2ddfb765f082d0d88472626336ad2609 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Thu, 15 Oct 2015 17:36:55 -0700
Subject: [PATCH 255/896] [SPARK-11135] [SQL] Exchange incorrectly skips sorts
 when existing ordering is non-empty subset of required ordering

In Spark SQL, the Exchange planner tries to avoid unnecessary sorts in cases where the data has already been sorted by a superset of the requested sorting columns. For instance, let's say that a query calls for an operator's input to be sorted by `a.asc` and the input happens to already be sorted by `[a.asc, b.asc]`. In this case, we do not need to re-sort the input. The converse, however, is not true: if the query calls for `[a.asc, b.asc]`, then `a.asc` alone will not satisfy the ordering requirements, requiring an additional sort to be planned by Exchange.

However, the current Exchange code gets this wrong and incorrectly skips sorting when the existing output ordering is a subset of the required ordering. This is simple to fix, however.

This bug was introduced in https://github.com/apache/spark/pull/7458, so it affects 1.5.0+.

This patch fixes the bug and significantly improves the unit test coverage of Exchange's sort-planning logic.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9140 from JoshRosen/SPARK-11135.
---
 .../apache/spark/sql/execution/Exchange.scala |  5 +-
 .../spark/sql/execution/PlannerSuite.scala    | 49 +++++++++++++++++++
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 289453753f18..1d3379a5e2d9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -219,6 +219,8 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
     val requiredChildDistributions: Seq[Distribution] = operator.requiredChildDistribution
     val requiredChildOrderings: Seq[Seq[SortOrder]] = operator.requiredChildOrdering
     var children: Seq[SparkPlan] = operator.children
+    assert(requiredChildDistributions.length == children.length)
+    assert(requiredChildOrderings.length == children.length)
 
     // Ensure that the operator's children satisfy their output distribution requirements:
     children = children.zip(requiredChildDistributions).map { case (child, distribution) =>
@@ -248,8 +250,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
     children = children.zip(requiredChildOrderings).map { case (child, requiredOrdering) =>
       if (requiredOrdering.nonEmpty) {
         // If child.outputOrdering is [a, b] and requiredOrdering is [a], we do not need to sort.
-        val minSize = Seq(requiredOrdering.size, child.outputOrdering.size).min
-        if (minSize == 0 || requiredOrdering.take(minSize) != child.outputOrdering.take(minSize)) {
+        if (requiredOrdering != child.outputOrdering.take(requiredOrdering.length)) {
           sqlContext.planner.BasicOperators.getSortOperator(requiredOrdering, global = false, child)
         } else {
           child
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index cafa1d515478..ebdab1c26d7b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -354,6 +354,55 @@ class PlannerSuite extends SharedSQLContext {
     }
   }
 
+  test("EnsureRequirements adds sort when there is no existing ordering") {
+    val orderingA = SortOrder(Literal(1), Ascending)
+    val orderingB = SortOrder(Literal(2), Ascending)
+    assert(orderingA != orderingB)
+    val inputPlan = DummySparkPlan(
+      children = DummySparkPlan(outputOrdering = Seq.empty) :: Nil,
+      requiredChildOrdering = Seq(Seq(orderingB)),
+      requiredChildDistribution = Seq(UnspecifiedDistribution)
+    )
+    val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
+    assertDistributionRequirementsAreSatisfied(outputPlan)
+    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.isEmpty) {
+      fail(s"Sort should have been added:\n$outputPlan")
+    }
+  }
+
+  test("EnsureRequirements skips sort when required ordering is prefix of existing ordering") {
+    val orderingA = SortOrder(Literal(1), Ascending)
+    val orderingB = SortOrder(Literal(2), Ascending)
+    assert(orderingA != orderingB)
+    val inputPlan = DummySparkPlan(
+      children = DummySparkPlan(outputOrdering = Seq(orderingA, orderingB)) :: Nil,
+      requiredChildOrdering = Seq(Seq(orderingA)),
+      requiredChildDistribution = Seq(UnspecifiedDistribution)
+    )
+    val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
+    assertDistributionRequirementsAreSatisfied(outputPlan)
+    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.nonEmpty) {
+      fail(s"No sorts should have been added:\n$outputPlan")
+    }
+  }
+
+  // This is a regression test for SPARK-11135
+  test("EnsureRequirements adds sort when required ordering isn't a prefix of existing ordering") {
+    val orderingA = SortOrder(Literal(1), Ascending)
+    val orderingB = SortOrder(Literal(2), Ascending)
+    assert(orderingA != orderingB)
+    val inputPlan = DummySparkPlan(
+      children = DummySparkPlan(outputOrdering = Seq(orderingA)) :: Nil,
+      requiredChildOrdering = Seq(Seq(orderingA, orderingB)),
+      requiredChildDistribution = Seq(UnspecifiedDistribution)
+    )
+    val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
+    assertDistributionRequirementsAreSatisfied(outputPlan)
+    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.isEmpty) {
+      fail(s"Sort should have been added:\n$outputPlan")
+    }
+  }
+
   // ---------------------------------------------------------------------------------------------
 }
 

From 43f5d1f326d7a2a4a78fe94853d0d05237568203 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Fri, 16 Oct 2015 11:53:47 +0100
Subject: [PATCH 256/896] [SPARK-11060] [STREAMING] Fix some potential NPE in
 DStream transformation

This patch fixes:

1. Guard out against NPEs in `TransformedDStream` when parent DStream returns None instead of empty RDD.
2. Verify some input streams which will potentially return None.
3. Add unit test to verify the behavior when input stream returns None.

cc tdas , please help to review, thanks a lot :).

Author: jerryshao <sshao@hortonworks.com>

Closes #9070 from jerryshao/SPARK-11060.
---
 .../dstream/ConstantInputDStream.scala        |  6 +-
 .../streaming/dstream/QueueInputDStream.scala |  2 +-
 .../dstream/TransformedDStream.scala          |  7 +-
 .../streaming/dstream/UnionDStream.scala      | 11 ++--
 .../streaming/BasicOperationsSuite.scala      | 66 +++++++++++++++++++
 5 files changed, 83 insertions(+), 9 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/ConstantInputDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/ConstantInputDStream.scala
index f396c347581c..4eb92dd8b105 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/ConstantInputDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/ConstantInputDStream.scala
@@ -17,9 +17,10 @@
 
 package org.apache.spark.streaming.dstream
 
+import scala.reflect.ClassTag
+
 import org.apache.spark.rdd.RDD
 import org.apache.spark.streaming.{Time, StreamingContext}
-import scala.reflect.ClassTag
 
 /**
  * An input stream that always returns the same RDD on each timestep. Useful for testing.
@@ -27,6 +28,9 @@ import scala.reflect.ClassTag
 class ConstantInputDStream[T: ClassTag](ssc_ : StreamingContext, rdd: RDD[T])
   extends InputDStream[T](ssc_) {
 
+  require(rdd != null,
+    "parameter rdd null is illegal, which will lead to NPE in the following transformation")
+
   override def start() {}
 
   override def stop() {}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/QueueInputDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/QueueInputDStream.scala
index a2685046e03d..cd073646370d 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/QueueInputDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/QueueInputDStream.scala
@@ -62,7 +62,7 @@ class QueueInputDStream[T: ClassTag](
     } else if (defaultRDD != null) {
       Some(defaultRDD)
     } else {
-      None
+      Some(ssc.sparkContext.emptyRDD)
     }
   }
 
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
index ab01f47d5cf9..5eabdf63dc8d 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
@@ -20,7 +20,7 @@ package org.apache.spark.streaming.dstream
 import scala.reflect.ClassTag
 
 import org.apache.spark.SparkException
-import org.apache.spark.rdd.{PairRDDFunctions, RDD}
+import org.apache.spark.rdd.RDD
 import org.apache.spark.streaming.{Duration, Time}
 
 private[streaming]
@@ -39,7 +39,10 @@ class TransformedDStream[U: ClassTag] (
   override def slideDuration: Duration = parents.head.slideDuration
 
   override def compute(validTime: Time): Option[RDD[U]] = {
-    val parentRDDs = parents.map(_.getOrCompute(validTime).orNull).toSeq
+    val parentRDDs = parents.map { parent => parent.getOrCompute(validTime).getOrElse(
+      // Guard out against parent DStream that return None instead of Some(rdd) to avoid NPE
+      throw new SparkException(s"Couldn't generate RDD from parent at time $validTime"))
+    }
     val transformedRDD = transformFunc(parentRDDs, validTime)
     if (transformedRDD == null) {
       throw new SparkException("Transform function must not return null. " +
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/UnionDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/UnionDStream.scala
index 9405dbaa1232..d73ffdfd84d2 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/UnionDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/UnionDStream.scala
@@ -17,13 +17,14 @@
 
 package org.apache.spark.streaming.dstream
 
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.ClassTag
+
+import org.apache.spark.SparkException
 import org.apache.spark.streaming.{Duration, Time}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.rdd.UnionRDD
 
-import scala.collection.mutable.ArrayBuffer
-import scala.reflect.ClassTag
-
 private[streaming]
 class UnionDStream[T: ClassTag](parents: Array[DStream[T]])
   extends DStream[T](parents.head.ssc) {
@@ -41,8 +42,8 @@ class UnionDStream[T: ClassTag](parents: Array[DStream[T]])
     val rdds = new ArrayBuffer[RDD[T]]()
     parents.map(_.getOrCompute(validTime)).foreach {
       case Some(rdd) => rdds += rdd
-      case None => throw new Exception("Could not generate RDD from a parent for unifying at time "
-        + validTime)
+      case None => throw new SparkException("Could not generate RDD from a parent for unifying at" +
+        s" time $validTime")
     }
     if (rdds.size > 0) {
       Some(new UnionRDD(ssc.sc, rdds))
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
index 9988f410f0bc..9d296c6d3ef8 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/BasicOperationsSuite.scala
@@ -191,6 +191,20 @@ class BasicOperationsSuite extends TestSuiteBase {
     )
   }
 
+  test("union with input stream return None") {
+    val input = Seq(1 to 4, 101 to 104, 201 to 204, null)
+    val output = Seq(1 to 8, 101 to 108, 201 to 208)
+    intercept[SparkException] {
+      testOperation(
+        input,
+        (s: DStream[Int]) => s.union(s.map(_ + 4)),
+        output,
+        input.length,
+        false
+      )
+    }
+  }
+
   test("StreamingContext.union") {
     val input = Seq(1 to 4, 101 to 104, 201 to 204)
     val output = Seq(1 to 12, 101 to 112, 201 to 212)
@@ -224,6 +238,19 @@ class BasicOperationsSuite extends TestSuiteBase {
     }
   }
 
+  test("transform with input stream return None") {
+    val input = Seq(1 to 4, 5 to 8, null)
+    intercept[SparkException] {
+      testOperation(
+        input,
+        (r: DStream[Int]) => r.transform(rdd => rdd.map(_.toString)),
+        input.filterNot(_ == null).map(_.map(_.toString)),
+        input.length,
+        false
+      )
+    }
+  }
+
   test("transformWith") {
     val inputData1 = Seq( Seq("a", "b"), Seq("a", ""), Seq(""), Seq() )
     val inputData2 = Seq( Seq("a", "b"), Seq("b", ""), Seq(), Seq("")   )
@@ -244,6 +271,27 @@ class BasicOperationsSuite extends TestSuiteBase {
     testOperation(inputData1, inputData2, operation, outputData, true)
   }
 
+  test("transformWith with input stream return None") {
+    val inputData1 = Seq( Seq("a", "b"), Seq("a", ""), Seq(""), null )
+    val inputData2 = Seq( Seq("a", "b"), Seq("b", ""), Seq(), null )
+    val outputData = Seq(
+      Seq("a", "b", "a", "b"),
+      Seq("a", "b", "", ""),
+      Seq("")
+    )
+
+    val operation = (s1: DStream[String], s2: DStream[String]) => {
+      s1.transformWith(           // RDD.join in transform
+        s2,
+        (rdd1: RDD[String], rdd2: RDD[String]) => rdd1.union(rdd2)
+      )
+    }
+
+    intercept[SparkException] {
+      testOperation(inputData1, inputData2, operation, outputData, inputData1.length, true)
+    }
+  }
+
   test("StreamingContext.transform") {
     val input = Seq(1 to 4, 101 to 104, 201 to 204)
     val output = Seq(1 to 12, 101 to 112, 201 to 212)
@@ -260,6 +308,24 @@ class BasicOperationsSuite extends TestSuiteBase {
     testOperation(input, operation, output)
   }
 
+  test("StreamingContext.transform with input stream return None") {
+    val input = Seq(1 to 4, 101 to 104, 201 to 204, null)
+    val output = Seq(1 to 12, 101 to 112, 201 to 212)
+
+    // transform over 3 DStreams by doing union of the 3 RDDs
+    val operation = (s: DStream[Int]) => {
+      s.context.transform(
+        Seq(s, s.map(_ + 4), s.map(_ + 8)),   // 3 DStreams
+        (rdds: Seq[RDD[_]], time: Time) =>
+          rdds.head.context.union(rdds.map(_.asInstanceOf[RDD[Int]]))  // union of RDDs
+      )
+    }
+
+    intercept[SparkException] {
+      testOperation(input, operation, output, input.length, false)
+    }
+  }
+
   test("cogroup") {
     val inputData1 = Seq( Seq("a", "a", "b"), Seq("a", ""), Seq(""), Seq() )
     val inputData2 = Seq( Seq("a", "a", "b"), Seq("b", ""), Seq(), Seq()   )

From ed775042cceb61a0566502e1306ac3c70f4a6a5f Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Fri, 16 Oct 2015 12:03:05 +0100
Subject: [PATCH 257/896] [SPARK-11092] [DOCS] Add source links to scaladoc
 generation

Modify the SBT build script to include GitHub source links for generated Scaladocs, on releases only (no snapshots).

Author: Jakob Odersky <jodersky@gmail.com>

Closes #9110 from jodersky/unidoc.
---
 project/SparkBuild.scala | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 1339980c3880..8f0f310ddd24 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -156,6 +156,10 @@ object SparkBuild extends PomBuild {
 
     javacOptions in Compile ++= Seq("-encoding", "UTF-8"),
 
+    scalacOptions in Compile ++= Seq(
+      "-sourcepath", (baseDirectory in ThisBuild).value.getAbsolutePath  // Required for relative source links in scaladoc
+    ),
+
     // Implements -Xfatal-warnings, ignoring deprecation warnings.
     // Code snippet taken from https://issues.scala-lang.org/browse/SI-8410.
     compile in Compile := {
@@ -489,6 +493,8 @@ object Unidoc {
       .map(_.filterNot(_.getCanonicalPath.contains("org/apache/spark/sql/hive/test")))
   }
 
+  val unidocSourceBase = settingKey[String]("Base URL of source links in Scaladoc.")
+
   lazy val settings = scalaJavaUnidocSettings ++ Seq (
     publish := {},
 
@@ -531,8 +537,19 @@ object Unidoc {
       "-noqualifier", "java.lang"
     ),
 
-    // Group similar methods together based on the @group annotation.
-    scalacOptions in (ScalaUnidoc, unidoc) ++= Seq("-groups")
+    // Use GitHub repository for Scaladoc source linke
+    unidocSourceBase := s"https://github.com/apache/spark/tree/v${version.value}",
+
+    scalacOptions in (ScalaUnidoc, unidoc) ++= Seq(
+      "-groups" // Group similar methods together based on the @group annotation.
+    ) ++ (
+      // Add links to sources when generating Scaladoc for a non-snapshot release
+      if (!isSnapshot.value) {
+        Opts.doc.sourceUrl(unidocSourceBase.value + "€{FILE_PATH}.scala")
+      } else {
+        Seq()
+      }
+    )
   )
 }
 

From 08698ee1d6f29b2c999416f18a074d5193cdacd5 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Fri, 16 Oct 2015 14:26:34 +0100
Subject: [PATCH 258/896] [SPARK-11094] Strip extra strings from Java version
 in test runner

Removes any extra strings from the Java version, fixing subsequent integer parsing.
This is required since some OpenJDK versions (specifically in Debian testing), append an extra "-internal" string to the version field.

Author: Jakob Odersky <jodersky@gmail.com>

Closes #9111 from jodersky/fixtestrunner.
---
 dev/run-tests.py | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/dev/run-tests.py b/dev/run-tests.py
index 1a816585187d..d4d6880491bc 100755
--- a/dev/run-tests.py
+++ b/dev/run-tests.py
@@ -176,17 +176,14 @@ def determine_java_version(java_exe):
     # find raw version string, eg 'java version "1.8.0_25"'
     raw_version_str = next(x for x in raw_output_lines if " version " in x)
 
-    version_str = raw_version_str.split()[-1].strip('"')  # eg '1.8.0_25'
-    version, update = version_str.split('_')  # eg ['1.8.0', '25']
+    match = re.search('(\d+)\.(\d+)\.(\d+)_(\d+)', raw_version_str)
 
-    # map over the values and convert them to integers
-    version_info = [int(x) for x in version.split('.') + [update]]
-
-    return JavaVersion(major=version_info[0],
-                       minor=version_info[1],
-                       patch=version_info[2],
-                       update=version_info[3])
+    major = int(match.group(1))
+    minor = int(match.group(2))
+    patch = int(match.group(3))
+    update = int(match.group(4))
 
+    return JavaVersion(major, minor, patch, update)
 
 # -------------------------------------------------------------------------------------------------
 # Functions for running the other build and test scripts

From 4ee2cea2a43f7d04ab8511d9c029f80c5dadd48e Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Fri, 16 Oct 2015 17:24:18 +0100
Subject: [PATCH 259/896] [SPARK-11122] [BUILD] [WARN] Add tag to fatal
 warnings

Shows that an error is actually due to a fatal warning.

Author: Jakob Odersky <jodersky@gmail.com>

Closes #9128 from jodersky/fatalwarnings.
---
 project/SparkBuild.scala | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 8f0f310ddd24..766edd9500c3 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -164,7 +164,7 @@ object SparkBuild extends PomBuild {
     // Code snippet taken from https://issues.scala-lang.org/browse/SI-8410.
     compile in Compile := {
       val analysis = (compile in Compile).value
-      val s = streams.value
+      val out = streams.value
 
       def logProblem(l: (=> String) => Unit, f: File, p: xsbti.Problem) = {
         l(f.toString + ":" + p.position.line.fold("")(_ + ":") + " " + p.message)
@@ -181,7 +181,14 @@ object SparkBuild extends PomBuild {
             failed = failed + 1
           }
 
-          logProblem(if (deprecation) s.log.warn else s.log.error, k, p)
+          val printer: (=> String) => Unit = s => if (deprecation) {
+            out.log.warn(s)
+          } else {
+            out.log.error("[warn] " + s)
+          }
+
+          logProblem(printer, k, p)
+
         }
       }
 

From b9c5e5d4ac4c9fe29e880f4ee562a9c552e81d29 Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Fri, 16 Oct 2015 11:19:37 -0700
Subject: [PATCH 260/896] [SPARK-11124] JsonParser/Generator should be closed
 for resource recycle

Some json parsers are not closed. parser in JacksonParser#parseJson, for example.

Author: navis.ryu <navis@apache.org>

Closes #9130 from navis/SPARK-11124.
---
 .../scala/org/apache/spark/util/Utils.scala   |  4 ++
 .../expressions/jsonExpressions.scala         | 56 +++++++++----------
 .../datasources/json/InferSchema.scala        |  8 ++-
 .../datasources/json/JacksonParser.scala      | 41 +++++++-------
 4 files changed, 57 insertions(+), 52 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index bd7e51c3b510..22c05a247942 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -2153,6 +2153,10 @@ private[spark] object Utils extends Logging {
       conf.getInt("spark.executor.instances", 0) == 0
   }
 
+  def tryWithResource[R <: Closeable, T](createResource: => R)(f: R => T): T = {
+    val resource = createResource
+    try f.apply(resource) finally resource.close()
+  }
 }
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
index 0770fab0ae90..8c9853e628d2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
@@ -25,6 +25,7 @@ import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
 import org.apache.spark.sql.types.{StructField, StructType, StringType, DataType}
 import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.util.Utils
 
 import scala.util.parsing.combinator.RegexParsers
 
@@ -134,16 +135,18 @@ case class GetJsonObject(json: Expression, path: Expression)
 
     if (parsed.isDefined) {
       try {
-        val parser = jsonFactory.createParser(jsonStr.getBytes)
-        val output = new ByteArrayOutputStream()
-        val generator = jsonFactory.createGenerator(output, JsonEncoding.UTF8)
-        parser.nextToken()
-        val matched = evaluatePath(parser, generator, RawStyle, parsed.get)
-        generator.close()
-        if (matched) {
-          UTF8String.fromBytes(output.toByteArray)
-        } else {
-          null
+        Utils.tryWithResource(jsonFactory.createParser(jsonStr.getBytes)) { parser =>
+          val output = new ByteArrayOutputStream()
+          val matched = Utils.tryWithResource(
+            jsonFactory.createGenerator(output, JsonEncoding.UTF8)) { generator =>
+            parser.nextToken()
+            evaluatePath(parser, generator, RawStyle, parsed.get)
+          }
+          if (matched) {
+            UTF8String.fromBytes(output.toByteArray)
+          } else {
+            null
+          }
         }
       } catch {
         case _: JsonProcessingException => null
@@ -250,17 +253,18 @@ case class GetJsonObject(json: Expression, path: Expression)
         // temporarily buffer child matches, the emitted json will need to be
         // modified slightly if there is only a single element written
         val buffer = new StringWriter()
-        val flattenGenerator = jsonFactory.createGenerator(buffer)
-        flattenGenerator.writeStartArray()
 
         var dirty = 0
-        while (p.nextToken() != END_ARRAY) {
-          // track the number of array elements and only emit an outer array if
-          // we've written more than one element, this matches Hive's behavior
-          dirty += (if (evaluatePath(p, flattenGenerator, nextStyle, xs)) 1 else 0)
+        Utils.tryWithResource(jsonFactory.createGenerator(buffer)) { flattenGenerator =>
+          flattenGenerator.writeStartArray()
+
+          while (p.nextToken() != END_ARRAY) {
+            // track the number of array elements and only emit an outer array if
+            // we've written more than one element, this matches Hive's behavior
+            dirty += (if (evaluatePath(p, flattenGenerator, nextStyle, xs)) 1 else 0)
+          }
+          flattenGenerator.writeEndArray()
         }
-        flattenGenerator.writeEndArray()
-        flattenGenerator.close()
 
         val buf = buffer.getBuffer
         if (dirty > 1) {
@@ -370,12 +374,8 @@ case class JsonTuple(children: Seq[Expression])
     }
 
     try {
-      val parser = jsonFactory.createParser(json.getBytes)
-
-      try {
-        parseRow(parser, input)
-      } finally {
-        parser.close()
+      Utils.tryWithResource(jsonFactory.createParser(json.getBytes)) {
+        parser => parseRow(parser, input)
       }
     } catch {
       case _: JsonProcessingException =>
@@ -420,12 +420,8 @@ case class JsonTuple(children: Seq[Expression])
 
           // write the output directly to UTF8 encoded byte array
           if (parser.nextToken() != JsonToken.VALUE_NULL) {
-            val generator = jsonFactory.createGenerator(output, JsonEncoding.UTF8)
-
-            try {
-              copyCurrentStructure(generator, parser)
-            } finally {
-              generator.close()
+            Utils.tryWithResource(jsonFactory.createGenerator(output, JsonEncoding.UTF8)) {
+              generator => copyCurrentStructure(generator, parser)
             }
 
             row(idx) = UTF8String.fromBytes(output.toByteArray)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
index b6f3410bad69..d0780028dacb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
@@ -23,6 +23,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.analysis.HiveTypeCoercion
 import org.apache.spark.sql.execution.datasources.json.JacksonUtils.nextUntil
 import org.apache.spark.sql.types._
+import org.apache.spark.util.Utils
 
 private[sql] object InferSchema {
   /**
@@ -47,9 +48,10 @@ private[sql] object InferSchema {
       val factory = new JsonFactory()
       iter.map { row =>
         try {
-          val parser = factory.createParser(row)
-          parser.nextToken()
-          inferField(parser)
+          Utils.tryWithResource(factory.createParser(row)) { parser =>
+            parser.nextToken()
+            inferField(parser)
+          }
         } catch {
           case _: JsonParseException =>
             StructType(Seq(StructField(columnNameOfCorruptRecords, StringType)))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
index c51140749c8e..09b8a9e936a1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
@@ -30,6 +30,7 @@ import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.execution.datasources.json.JacksonUtils.nextUntil
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.util.Utils
 
 private[sql] object JacksonParser {
   def apply(
@@ -86,9 +87,9 @@ private[sql] object JacksonParser {
 
       case (_, StringType) =>
         val writer = new ByteArrayOutputStream()
-        val generator = factory.createGenerator(writer, JsonEncoding.UTF8)
-        generator.copyCurrentStructure(parser)
-        generator.close()
+        Utils.tryWithResource(factory.createGenerator(writer, JsonEncoding.UTF8)) {
+          generator => generator.copyCurrentStructure(parser)
+        }
         UTF8String.fromBytes(writer.toByteArray)
 
       case (VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT, FloatType) =>
@@ -245,22 +246,24 @@ private[sql] object JacksonParser {
 
       iter.flatMap { record =>
         try {
-          val parser = factory.createParser(record)
-          parser.nextToken()
-
-          convertField(factory, parser, schema) match {
-            case null => failedRecord(record)
-            case row: InternalRow => row :: Nil
-            case array: ArrayData =>
-              if (array.numElements() == 0) {
-                Nil
-              } else {
-                array.toArray[InternalRow](schema)
-              }
-            case _ =>
-              sys.error(
-                s"Failed to parse record $record. Please make sure that each line of the file " +
-                  "(or each string in the RDD) is a valid JSON object or an array of JSON objects.")
+          Utils.tryWithResource(factory.createParser(record)) { parser =>
+            parser.nextToken()
+
+            convertField(factory, parser, schema) match {
+              case null => failedRecord(record)
+              case row: InternalRow => row :: Nil
+              case array: ArrayData =>
+                if (array.numElements() == 0) {
+                  Nil
+                } else {
+                  array.toArray[InternalRow](schema)
+                }
+              case _ =>
+                sys.error(
+                  s"Failed to parse record $record. Please make sure that each line of the file " +
+                    "(or each string in the RDD) is a valid JSON object or " +
+                    "an array of JSON objects.")
+            }
           }
         } catch {
           case _: JsonProcessingException =>

From 3d683a139b333456a6bd8801ac5f113d1ac3fd18 Mon Sep 17 00:00:00 2001
From: Pravin Gadakh <pravingadakh177@gmail.com>
Date: Fri, 16 Oct 2015 13:38:50 -0700
Subject: [PATCH 261/896] [SPARK-10581] [DOCS] Groups are not resolved in
 scaladoc in sql classes

Groups are not resolved properly in scaladoc in following classes:

sql/core/src/main/scala/org/apache/spark/sql/Column.scala
sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
sql/core/src/main/scala/org/apache/spark/sql/functions.scala

Author: Pravin Gadakh <pravingadakh177@gmail.com>

Closes #9148 from pravingadakh/master.
---
 sql/core/src/main/scala/org/apache/spark/sql/Column.scala | 8 ++++----
 .../src/main/scala/org/apache/spark/sql/SQLContext.scala  | 2 +-
 .../src/main/scala/org/apache/spark/sql/functions.scala   | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 807bc8c30c12..1f826887ac77 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -41,10 +41,10 @@ private[sql] object Column {
  * :: Experimental ::
  * A column in a [[DataFrame]].
  *
- * @groupname java_expr_ops Java-specific expression operators.
- * @groupname expr_ops Expression operators.
- * @groupname df_ops DataFrame functions.
- * @groupname Ungrouped Support functions for DataFrames.
+ * @groupname java_expr_ops Java-specific expression operators
+ * @groupname expr_ops Expression operators
+ * @groupname df_ops DataFrame functions
+ * @groupname Ungrouped Support functions for DataFrames
  *
  * @since 1.3.0
  */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 361eb576c567..e83657a60558 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -59,7 +59,7 @@ import org.apache.spark.util.Utils
  * @groupname specificdata Specific Data Sources
  * @groupname config Configuration
  * @groupname dataframes Custom DataFrame Creation
- * @groupname Ungrouped Support functions for language integrated queries.
+ * @groupname Ungrouped Support functions for language integrated queries
  *
  * @since 1.0.0
  */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 2467b4e48415..15c864a8ab64 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -43,7 +43,7 @@ import org.apache.spark.util.Utils
  * @groupname window_funcs Window functions
  * @groupname string_funcs String functions
  * @groupname collection_funcs Collection functions
- * @groupname Ungrouped Support functions for DataFrames.
+ * @groupname Ungrouped Support functions for DataFrames
  * @since 1.3.0
  */
 @Experimental

From 369d786f58580e7df73e7e23f27390d37269d0de Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Fri, 16 Oct 2015 13:53:06 -0700
Subject: [PATCH 262/896] [SPARK-10974] [STREAMING] Add progress bar for output
 operation column and use red dots for failed batches

Screenshot:
<img width="1363" alt="1" src="https://cloud.githubusercontent.com/assets/1000778/10342571/385d9340-6d4c-11e5-8e79-1fa4c3c98f81.png">

Also fixed the description and duration for output operations that don't have spark jobs.
<img width="1354" alt="2" src="https://cloud.githubusercontent.com/assets/1000778/10342775/4bd52a0e-6d4d-11e5-99bc-26265a9fc792.png">

Author: zsxwing <zsxwing@gmail.com>

Closes #9010 from zsxwing/output-op-progress-bar.
---
 .../streaming/ui/static/streaming-page.js     |  26 ++-
 .../apache/spark/streaming/DStreamGraph.scala |   2 +-
 .../spark/streaming/scheduler/BatchInfo.scala |  23 +--
 .../spark/streaming/scheduler/Job.scala       |  30 ++-
 .../streaming/scheduler/JobScheduler.scala    |  12 +-
 .../spark/streaming/scheduler/JobSet.scala    |  17 +-
 .../scheduler/OutputOperationInfo.scala       |   6 +-
 .../spark/streaming/ui/AllBatchesTable.scala  |  40 ++--
 .../apache/spark/streaming/ui/BatchPage.scala | 174 +++++++-----------
 .../spark/streaming/ui/BatchUIData.scala      |  67 ++++++-
 .../ui/StreamingJobProgressListener.scala     |  14 ++
 .../streaming/StreamingListenerSuite.scala    |  16 +-
 .../spark/streaming/UISeleniumSuite.scala     |   2 +-
 .../StreamingJobProgressListenerSuite.scala   |  30 +--
 14 files changed, 258 insertions(+), 201 deletions(-)

diff --git a/streaming/src/main/resources/org/apache/spark/streaming/ui/static/streaming-page.js b/streaming/src/main/resources/org/apache/spark/streaming/ui/static/streaming-page.js
index 4886b68eeaf7..f82323a1cdd9 100644
--- a/streaming/src/main/resources/org/apache/spark/streaming/ui/static/streaming-page.js
+++ b/streaming/src/main/resources/org/apache/spark/streaming/ui/static/streaming-page.js
@@ -154,34 +154,40 @@ function drawTimeline(id, data, minX, maxX, minY, maxY, unitY, batchInterval) {
     var lastClickedBatch = null;
     var lastTimeout = null;
 
+    function isFailedBatch(batchTime) {
+        return $("#batch-" + batchTime).attr("isFailed") == "true";
+    }
+
     // Add points to the line. However, we make it invisible at first. But when the user moves mouse
     // over a point, it will be displayed with its detail.
     svg.selectAll(".point")
         .data(data)
         .enter().append("circle")
-            .attr("stroke", "white") // white and opacity = 0 make it invisible
-            .attr("fill", "white")
-            .attr("opacity", "0")
+            .attr("stroke", function(d) { return isFailedBatch(d.x) ? "red" : "white";}) // white and opacity = 0 make it invisible
+            .attr("fill", function(d) { return isFailedBatch(d.x) ? "red" : "white";})
+            .attr("opacity", function(d) { return isFailedBatch(d.x) ? "1" : "0";})
             .style("cursor", "pointer")
             .attr("cx", function(d) { return x(d.x); })
             .attr("cy", function(d) { return y(d.y); })
-            .attr("r", function(d) { return 3; })
+            .attr("r", function(d) { return isFailedBatch(d.x) ? "2" : "0";})
             .on('mouseover', function(d) {
                 var tip = formatYValue(d.y) + " " + unitY + " at " + timeFormat[d.x];
                 showBootstrapTooltip(d3.select(this).node(), tip);
                 // show the point
                 d3.select(this)
-                    .attr("stroke", "steelblue")
-                    .attr("fill", "steelblue")
-                    .attr("opacity", "1");
+                    .attr("stroke", function(d) { return isFailedBatch(d.x) ? "red" : "steelblue";})
+                    .attr("fill", function(d) { return isFailedBatch(d.x) ? "red" : "steelblue";})
+                    .attr("opacity", "1")
+                    .attr("r", "3");
             })
             .on('mouseout',  function() {
                 hideBootstrapTooltip(d3.select(this).node());
                 // hide the point
                 d3.select(this)
-                    .attr("stroke", "white")
-                    .attr("fill", "white")
-                    .attr("opacity", "0");
+                    .attr("stroke", function(d) { return isFailedBatch(d.x) ? "red" : "white";})
+                    .attr("fill", function(d) { return isFailedBatch(d.x) ? "red" : "white";})
+                    .attr("opacity", function(d) { return isFailedBatch(d.x) ? "1" : "0";})
+                    .attr("r", function(d) { return isFailedBatch(d.x) ? "2" : "0";});
             })
             .on("click", function(d) {
                 if (lastTimeout != null) {
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
index de79c9ef1abf..1b0b7890b3b0 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
@@ -113,7 +113,7 @@ final private[streaming] class DStreamGraph extends Serializable with Logging {
     val jobs = this.synchronized {
       outputStreams.flatMap { outputStream =>
         val jobOption = outputStream.generateJob(time)
-        jobOption.foreach(_.setCallSite(outputStream.creationSite.longForm))
+        jobOption.foreach(_.setCallSite(outputStream.creationSite))
         jobOption
       }
     }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
index 463f899dc249..436eb0a56614 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/BatchInfo.scala
@@ -29,6 +29,7 @@ import org.apache.spark.streaming.Time
  *                        the streaming scheduler queue
  * @param processingStartTime Clock time of when the first job of this batch started processing
  * @param processingEndTime Clock time of when the last job of this batch finished processing
+ * @param outputOperationInfos The output operations in this batch
  */
 @DeveloperApi
 case class BatchInfo(
@@ -36,13 +37,10 @@ case class BatchInfo(
     streamIdToInputInfo: Map[Int, StreamInputInfo],
     submissionTime: Long,
     processingStartTime: Option[Long],
-    processingEndTime: Option[Long]
+    processingEndTime: Option[Long],
+    outputOperationInfos: Map[Int, OutputOperationInfo]
   ) {
 
-  private var _failureReasons: Map[Int, String] = Map.empty
-
-  private var _numOutputOp: Int = 0
-
   @deprecated("Use streamIdToInputInfo instead", "1.5.0")
   def streamIdToNumRecords: Map[Int, Long] = streamIdToInputInfo.mapValues(_.numRecords)
 
@@ -72,19 +70,4 @@ case class BatchInfo(
    */
   def numRecords: Long = streamIdToInputInfo.values.map(_.numRecords).sum
 
-  /** Set the failure reasons corresponding to every output ops in the batch */
-  private[streaming] def setFailureReason(reasons: Map[Int, String]): Unit = {
-    _failureReasons = reasons
-  }
-
-  /** Failure reasons corresponding to every output ops in the batch */
-  private[streaming] def failureReasons = _failureReasons
-
-  /** Set the number of output operations in this batch */
-  private[streaming] def setNumOutputOp(numOutputOp: Int): Unit = {
-    _numOutputOp = numOutputOp
-  }
-
-  /** Return the number of output operations in this batch */
-  private[streaming] def numOutputOp: Int = _numOutputOp
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
index 1373053f064f..ab1b3565fcc1 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/Job.scala
@@ -17,8 +17,10 @@
 
 package org.apache.spark.streaming.scheduler
 
+import scala.util.{Failure, Try}
+
 import org.apache.spark.streaming.Time
-import scala.util.Try
+import org.apache.spark.util.{Utils, CallSite}
 
 /**
  * Class representing a Spark computation. It may contain multiple Spark jobs.
@@ -29,7 +31,9 @@ class Job(val time: Time, func: () => _) {
   private var _outputOpId: Int = _
   private var isSet = false
   private var _result: Try[_] = null
-  private var _callSite: String = "Unknown"
+  private var _callSite: CallSite = null
+  private var _startTime: Option[Long] = None
+  private var _endTime: Option[Long] = None
 
   def run() {
     _result = Try(func())
@@ -71,11 +75,29 @@ class Job(val time: Time, func: () => _) {
     _outputOpId = outputOpId
   }
 
-  def setCallSite(callSite: String): Unit = {
+  def setCallSite(callSite: CallSite): Unit = {
     _callSite = callSite
   }
 
-  def callSite: String = _callSite
+  def callSite: CallSite = _callSite
+
+  def setStartTime(startTime: Long): Unit = {
+    _startTime = Some(startTime)
+  }
+
+  def setEndTime(endTime: Long): Unit = {
+    _endTime = Some(endTime)
+  }
+
+  def toOutputOperationInfo: OutputOperationInfo = {
+    val failureReason = if (_result != null && _result.isFailure) {
+      Some(Utils.exceptionString(_result.asInstanceOf[Failure[_]].exception))
+    } else {
+      None
+    }
+    OutputOperationInfo(
+      time, outputOpId, callSite.shortForm, callSite.longForm, _startTime, _endTime, failureReason)
+  }
 
   override def toString: String = id
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
index 0a4a396a0f49..2480b4ec093e 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
@@ -20,13 +20,13 @@ package org.apache.spark.streaming.scheduler
 import java.util.concurrent.{ConcurrentHashMap, TimeUnit}
 
 import scala.collection.JavaConverters._
-import scala.util.{Failure, Success}
+import scala.util.Failure
 
 import org.apache.spark.Logging
 import org.apache.spark.rdd.PairRDDFunctions
 import org.apache.spark.streaming._
 import org.apache.spark.streaming.ui.UIUtils
-import org.apache.spark.util.{EventLoop, ThreadUtils}
+import org.apache.spark.util.{EventLoop, ThreadUtils, Utils}
 
 
 private[scheduler] sealed trait JobSchedulerEvent
@@ -162,16 +162,16 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
       // correct "jobSet.processingStartTime".
       listenerBus.post(StreamingListenerBatchStarted(jobSet.toBatchInfo))
     }
-    listenerBus.post(StreamingListenerOutputOperationStarted(
-      OutputOperationInfo(job.time, job.outputOpId, job.callSite, Some(startTime), None)))
+    job.setStartTime(startTime)
+    listenerBus.post(StreamingListenerOutputOperationStarted(job.toOutputOperationInfo))
     logInfo("Starting job " + job.id + " from job set of time " + jobSet.time)
   }
 
   private def handleJobCompletion(job: Job, completedTime: Long) {
     val jobSet = jobSets.get(job.time)
     jobSet.handleJobCompletion(job)
-    listenerBus.post(StreamingListenerOutputOperationCompleted(
-      OutputOperationInfo(job.time, job.outputOpId, job.callSite, None, Some(completedTime))))
+    job.setEndTime(completedTime)
+    listenerBus.post(StreamingListenerOutputOperationCompleted(job.toOutputOperationInfo))
     logInfo("Finished job " + job.id + " from job set of time " + jobSet.time)
     if (jobSet.hasCompleted) {
       jobSets.remove(jobSet.time)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
index 08f63cc99268..f76300351e3c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobSet.scala
@@ -64,24 +64,13 @@ case class JobSet(
   }
 
   def toBatchInfo: BatchInfo = {
-    val failureReasons: Map[Int, String] = {
-      if (hasCompleted) {
-        jobs.filter(_.result.isFailure).map { job =>
-          (job.outputOpId, Utils.exceptionString(job.result.asInstanceOf[Failure[_]].exception))
-        }.toMap
-      } else {
-        Map.empty
-      }
-    }
-    val binfo = new BatchInfo(
+    BatchInfo(
       time,
       streamIdToInputInfo,
       submissionTime,
       if (processingStartTime >= 0) Some(processingStartTime) else None,
-      if (processingEndTime >= 0) Some(processingEndTime) else None
+      if (processingEndTime >= 0) Some(processingEndTime) else None,
+      jobs.map { job => (job.outputOpId, job.toOutputOperationInfo) }.toMap
     )
-    binfo.setFailureReason(failureReasons)
-    binfo.setNumOutputOp(jobs.size)
-    binfo
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala
index d5614b343912..137e512a670d 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/OutputOperationInfo.scala
@@ -25,17 +25,21 @@ import org.apache.spark.streaming.Time
  * Class having information on output operations.
  * @param batchTime Time of the batch
  * @param id Id of this output operation. Different output operations have different ids in a batch.
+ * @param name The name of this output operation.
  * @param description The description of this output operation.
  * @param startTime Clock time of when the output operation started processing
  * @param endTime Clock time of when the output operation started processing
+ * @param failureReason Failure reason if this output operation fails
  */
 @DeveloperApi
 case class OutputOperationInfo(
     batchTime: Time,
     id: Int,
+    name: String,
     description: String,
     startTime: Option[Long],
-    endTime: Option[Long]) {
+    endTime: Option[Long],
+    failureReason: Option[String]) {
 
   /**
    * Return the duration of this output operation.
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
index 3e6590d66f58..125cafd41b8a 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
@@ -17,9 +17,6 @@
 
 package org.apache.spark.streaming.ui
 
-import java.text.SimpleDateFormat
-import java.util.Date
-
 import scala.xml.Node
 
 import org.apache.spark.ui.{UIUtils => SparkUIUtils}
@@ -46,7 +43,8 @@ private[ui] abstract class BatchTableBase(tableId: String, batchInterval: Long)
     val formattedProcessingTime = processingTime.map(SparkUIUtils.formatDuration).getOrElse("-")
     val batchTimeId = s"batch-$batchTime"
 
-    <td id={batchTimeId} sorttable_customkey={batchTime.toString}>
+    <td id={batchTimeId} sorttable_customkey={batchTime.toString}
+        isFailed={batch.isFailed.toString}>
       <a href={s"batch?id=$batchTime"}>
         {formattedBatchTime}
       </a>
@@ -75,6 +73,19 @@ private[ui] abstract class BatchTableBase(tableId: String, batchInterval: Long)
     batchTable
   }
 
+  protected def createOutputOperationProgressBar(batch: BatchUIData): Seq[Node] = {
+    <td class="progress-cell">
+      {
+      SparkUIUtils.makeProgressBar(
+        started = batch.numActiveOutputOp,
+        completed = batch.numCompletedOutputOp,
+        failed = batch.numFailedOutputOp,
+        skipped = 0,
+        total = batch.outputOperations.size)
+      }
+    </td>
+  }
+
   /**
    * Return HTML for all rows of this table.
    */
@@ -86,7 +97,10 @@ private[ui] class ActiveBatchTable(
     waitingBatches: Seq[BatchUIData],
     batchInterval: Long) extends BatchTableBase("active-batches-table", batchInterval) {
 
-  override protected def columns: Seq[Node] = super.columns ++ <th>Status</th>
+  override protected def columns: Seq[Node] = super.columns ++ {
+    <th>Output Ops: Succeeded/Total</th>
+      <th>Status</th>
+  }
 
   override protected def renderRows: Seq[Node] = {
     // The "batchTime"s of "waitingBatches" must be greater than "runningBatches"'s, so display
@@ -96,11 +110,11 @@ private[ui] class ActiveBatchTable(
   }
 
   private def runningBatchRow(batch: BatchUIData): Seq[Node] = {
-    baseRow(batch) ++ <td>processing</td>
+    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>processing</td>
   }
 
   private def waitingBatchRow(batch: BatchUIData): Seq[Node] = {
-    baseRow(batch) ++ <td>queued</td>
+    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>queued</td>
   }
 }
 
@@ -119,17 +133,11 @@ private[ui] class CompletedBatchTable(batches: Seq[BatchUIData], batchInterval:
   private def completedBatchRow(batch: BatchUIData): Seq[Node] = {
     val totalDelay = batch.totalDelay
     val formattedTotalDelay = totalDelay.map(SparkUIUtils.formatDuration).getOrElse("-")
-    val numFailedOutputOp = batch.failureReason.size
-    val outputOpColumn = if (numFailedOutputOp > 0) {
-        s"${batch.numOutputOp - numFailedOutputOp}/${batch.numOutputOp}" +
-          s" (${numFailedOutputOp} failed)"
-      } else {
-        s"${batch.numOutputOp}/${batch.numOutputOp}"
-      }
-    baseRow(batch) ++
+
+    baseRow(batch) ++ {
       <td sorttable_customkey={totalDelay.getOrElse(Long.MaxValue).toString}>
         {formattedTotalDelay}
       </td>
-      <td>{outputOpColumn}</td>
+    } ++ createOutputOperationProgressBar(batch)
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
index a19b85a51d28..2ed925572826 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
@@ -47,32 +47,30 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
   }
 
   private def generateJobRow(
-      outputOpId: OutputOpId,
+      outputOpData: OutputOperationUIData,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
-      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       sparkJob: SparkJobIdWithUIData): Seq[Node] = {
     if (sparkJob.jobUIData.isDefined) {
-      generateNormalJobRow(outputOpId, outputOpDescription, formattedOutputOpDuration,
-        outputOpStatus, numSparkJobRowsInOutputOp, isFirstRow, sparkJob.jobUIData.get)
+      generateNormalJobRow(outputOpData, outputOpDescription, formattedOutputOpDuration,
+        numSparkJobRowsInOutputOp, isFirstRow, sparkJob.jobUIData.get)
     } else {
-      generateDroppedJobRow(outputOpId, outputOpDescription, formattedOutputOpDuration,
-        outputOpStatus, numSparkJobRowsInOutputOp, isFirstRow, sparkJob.sparkJobId)
+      generateDroppedJobRow(outputOpData, outputOpDescription, formattedOutputOpDuration,
+        numSparkJobRowsInOutputOp, isFirstRow, sparkJob.sparkJobId)
     }
   }
 
   private def generateOutputOpRowWithoutSparkJobs(
-    outputOpId: OutputOpId,
+    outputOpData: OutputOperationUIData,
     outputOpDescription: Seq[Node],
-    formattedOutputOpDuration: String,
-    outputOpStatus: String): Seq[Node] = {
+    formattedOutputOpDuration: String): Seq[Node] = {
     <tr>
-      <td class="output-op-id-cell" >{outputOpId.toString}</td>
+      <td class="output-op-id-cell" >{outputOpData.id.toString}</td>
       <td>{outputOpDescription}</td>
       <td>{formattedOutputOpDuration}</td>
-      {outputOpStatusCell(outputOpStatus, rowspan = 1)}
+      {outputOpStatusCell(outputOpData, rowspan = 1)}
       <!-- Job Id -->
       <td>-</td>
       <!-- Duration -->
@@ -91,10 +89,9 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
    * one cell, we use "rowspan" for the first row of a output op.
    */
   private def generateNormalJobRow(
-      outputOpId: OutputOpId,
+      outputOpData: OutputOperationUIData,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
-      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       sparkJob: JobUIData): Seq[Node] = {
@@ -116,12 +113,12 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     // scalastyle:off
     val prefixCells =
       if (isFirstRow) {
-        <td class="output-op-id-cell" rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpId.toString}</td>
+        <td class="output-op-id-cell" rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpData.id.toString}</td>
         <td rowspan={numSparkJobRowsInOutputOp.toString}>
           {outputOpDescription}
         </td>
         <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td> ++
-        {outputOpStatusCell(outputOpStatus, numSparkJobRowsInOutputOp)}
+        {outputOpStatusCell(outputOpData, numSparkJobRowsInOutputOp)}
       } else {
         Nil
       }
@@ -161,10 +158,9 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
    * with "-" cells.
    */
   private def generateDroppedJobRow(
-      outputOpId: OutputOpId,
+      outputOpData: OutputOperationUIData,
       outputOpDescription: Seq[Node],
       formattedOutputOpDuration: String,
-      outputOpStatus: String,
       numSparkJobRowsInOutputOp: Int,
       isFirstRow: Boolean,
       jobId: Int): Seq[Node] = {
@@ -173,10 +169,10 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     // scalastyle:off
     val prefixCells =
       if (isFirstRow) {
-        <td class="output-op-id-cell" rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpId.toString}</td>
+        <td class="output-op-id-cell" rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpData.id.toString}</td>
           <td rowspan={numSparkJobRowsInOutputOp.toString}>{outputOpDescription}</td>
           <td rowspan={numSparkJobRowsInOutputOp.toString}>{formattedOutputOpDuration}</td> ++
-          {outputOpStatusCell(outputOpStatus, numSparkJobRowsInOutputOp)}
+          {outputOpStatusCell(outputOpData, numSparkJobRowsInOutputOp)}
       } else {
         Nil
       }
@@ -199,47 +195,34 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
   }
 
   private def generateOutputOpIdRow(
-      outputOpId: OutputOpId,
-      outputOpStatus: String,
+      outputOpData: OutputOperationUIData,
       sparkJobs: Seq[SparkJobIdWithUIData]): Seq[Node] = {
-    // We don't count the durations of dropped jobs
-    val sparkJobDurations = sparkJobs.filter(_.jobUIData.nonEmpty).map(_.jobUIData.get).
-      map(sparkJob => {
-        sparkJob.submissionTime.map { start =>
-          val end = sparkJob.completionTime.getOrElse(System.currentTimeMillis())
-          end - start
-        }
-      })
     val formattedOutputOpDuration =
-      if (sparkJobDurations.isEmpty || sparkJobDurations.exists(_ == None)) {
-        // If no job or any job does not finish, set "formattedOutputOpDuration" to "-"
+      if (outputOpData.duration.isEmpty) {
         "-"
       } else {
-        SparkUIUtils.formatDuration(sparkJobDurations.flatMap(x => x).sum)
+        SparkUIUtils.formatDuration(outputOpData.duration.get)
       }
 
-    val description = generateOutputOpDescription(sparkJobs)
+    val description = generateOutputOpDescription(outputOpData)
 
     if (sparkJobs.isEmpty) {
-      generateOutputOpRowWithoutSparkJobs(
-        outputOpId, description, formattedOutputOpDuration, outputOpStatus)
+      generateOutputOpRowWithoutSparkJobs(outputOpData, description, formattedOutputOpDuration)
     } else {
       val firstRow =
         generateJobRow(
-          outputOpId,
+          outputOpData,
           description,
           formattedOutputOpDuration,
-          outputOpStatus,
           sparkJobs.size,
           true,
           sparkJobs.head)
       val tailRows =
         sparkJobs.tail.map { sparkJob =>
           generateJobRow(
-            outputOpId,
+            outputOpData,
             description,
             formattedOutputOpDuration,
-            outputOpStatus,
             sparkJobs.size,
             false,
             sparkJob)
@@ -248,35 +231,18 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     }
   }
 
-  private def generateOutputOpDescription(sparkJobs: Seq[SparkJobIdWithUIData]): Seq[Node] = {
-    val lastStageInfo =
-      sparkJobs.flatMap(_.jobUIData).headOption. // Get the first JobUIData
-        flatMap { sparkJob => // For the first job, get the latest Stage info
-          if (sparkJob.stageIds.isEmpty) {
-            None
-          } else {
-            sparkListener.stageIdToInfo.get(sparkJob.stageIds.max)
-          }
-        }
-    lastStageInfo match {
-      case Some(stageInfo) =>
-        val details = if (stageInfo.details.nonEmpty) {
-          <span
-            onclick="this.parentNode.querySelector('.stage-details').classList.toggle('collapsed')"
-            class="expand-details">
-              +details
-          </span> ++
-          <div class="stage-details collapsed">
-            <pre>{stageInfo.details}</pre>
-          </div>
-        } else {
-          NodeSeq.Empty
-        }
-
-        <div> {stageInfo.name} {details} </div>
-      case None =>
-        Text("(Unknown)")
-    }
+  private def generateOutputOpDescription(outputOp: OutputOperationUIData): Seq[Node] = {
+    <div>
+      {outputOp.name}
+      <span
+        onclick="this.parentNode.querySelector('.stage-details').classList.toggle('collapsed')"
+        class="expand-details">
+          +details
+      </span>
+      <div class="stage-details collapsed">
+        <pre>{outputOp.description}</pre>
+      </div>
+    </div>
   }
 
   private def failureReasonCell(
@@ -329,6 +295,19 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     }
   }
 
+  private def generateOutputOperationStatusForUI(failure: String): String = {
+    if (failure.startsWith("org.apache.spark.SparkException")) {
+      "Failed due to Spark job error\n" + failure
+    } else {
+      var nextLineIndex = failure.indexOf("\n")
+      if (nextLineIndex < 0) {
+        nextLineIndex = failure.size
+      }
+      val firstLine = failure.substring(0, nextLineIndex)
+      s"Failed due to error: $firstLine\n$failure"
+    }
+  }
+
   /**
    * Generate the job table for the batch.
    */
@@ -338,26 +317,15 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         // sort SparkJobIds for each OutputOpId
         (outputOpId, outputOpIdAndSparkJobIds.map(_.sparkJobId).sorted)
       }
-    val outputOps = (0 until batchUIData.numOutputOp).map { outputOpId =>
-      val status = batchUIData.failureReason.get(outputOpId).map { failure =>
-        if (failure.startsWith("org.apache.spark.SparkException")) {
-          "Failed due to Spark job error\n" + failure
-        } else {
-          var nextLineIndex = failure.indexOf("\n")
-          if (nextLineIndex < 0) {
-            nextLineIndex = failure.size
-          }
-          val firstLine = failure.substring(0, nextLineIndex)
-          s"Failed due to error: $firstLine\n$failure"
-        }
-      }.getOrElse("Succeeded")
-      val sparkJobIds = outputOpIdToSparkJobIds.getOrElse(outputOpId, Seq.empty)
-      (outputOpId, status, sparkJobIds)
-    }
+
+    val outputOps: Seq[(OutputOperationUIData, Seq[SparkJobId])] =
+      batchUIData.outputOperations.map { case (outputOpId, outputOperation) =>
+        val sparkJobIds = outputOpIdToSparkJobIds.getOrElse(outputOpId, Seq.empty)
+        (outputOperation, sparkJobIds)
+      }.toSeq.sortBy(_._1.id)
     sparkListener.synchronized {
-      val outputOpIdWithJobs: Seq[(OutputOpId, String, Seq[SparkJobIdWithUIData])] =
-        outputOps.map { case (outputOpId, status, sparkJobIds) =>
-          (outputOpId, status,
+      val outputOpWithJobs = outputOps.map { case (outputOpData, sparkJobIds) =>
+          (outputOpData,
             sparkJobIds.map(sparkJobId => SparkJobIdWithUIData(sparkJobId, getJobData(sparkJobId))))
         }
 
@@ -367,9 +335,8 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         </thead>
         <tbody>
           {
-            outputOpIdWithJobs.map {
-              case (outputOpId, status, sparkJobIds) =>
-                generateOutputOpIdRow(outputOpId, status, sparkJobIds)
+            outputOpWithJobs.map { case (outputOpData, sparkJobIds) =>
+              generateOutputOpIdRow(outputOpData, sparkJobIds)
             }
           }
         </tbody>
@@ -377,7 +344,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     }
   }
 
-  def render(request: HttpServletRequest): Seq[Node] = {
+  def render(request: HttpServletRequest): Seq[Node] = streamingListener.synchronized {
     val batchTime = Option(request.getParameter("id")).map(id => Time(id.toLong)).getOrElse {
       throw new IllegalArgumentException(s"Missing id parameter")
     }
@@ -430,14 +397,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
         </ul>
       </div>
 
-    val jobTable =
-      if (batchUIData.outputOpIdSparkJobIdPairs.isEmpty) {
-        <div>Cannot find any job for Batch {formattedBatchTime}.</div>
-      } else {
-        generateJobTable(batchUIData)
-      }
-
-    val content = summary ++ jobTable
+    val content = summary ++ generateJobTable(batchUIData)
 
     SparkUIUtils.headerSparkPage(s"Details of batch at $formattedBatchTime", content, parent)
   }
@@ -471,11 +431,17 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
       replaceAllLiterally("\t", "&nbsp;&nbsp;&nbsp;&nbsp;").replaceAllLiterally("\n", "<br/>"))
   }
 
-  private def outputOpStatusCell(status: String, rowspan: Int): Seq[Node] = {
-    if (status == "Succeeded") {
-      <td rowspan={rowspan.toString}>Succeeded</td>
-    } else {
-      failureReasonCell(status, rowspan, includeFirstLineInExpandDetails = false)
+  private def outputOpStatusCell(outputOp: OutputOperationUIData, rowspan: Int): Seq[Node] = {
+    outputOp.failureReason match {
+      case Some(failureReason) =>
+        val failureReasonForUI = generateOutputOperationStatusForUI(failureReason)
+        failureReasonCell(failureReasonForUI, rowspan, includeFirstLineInExpandDetails = false)
+      case None =>
+        if (outputOp.endTime.isEmpty) {
+          <td rowspan={rowspan.toString}>-</td>
+        } else {
+          <td rowspan={rowspan.toString}>Succeeded</td>
+        }
     }
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
index e6c2e2140c6c..3ef3689de1c4 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchUIData.scala
@@ -18,8 +18,10 @@
 
 package org.apache.spark.streaming.ui
 
+import scala.collection.mutable
+
 import org.apache.spark.streaming.Time
-import org.apache.spark.streaming.scheduler.{BatchInfo, StreamInputInfo}
+import org.apache.spark.streaming.scheduler.{BatchInfo, OutputOperationInfo, StreamInputInfo}
 import org.apache.spark.streaming.ui.StreamingJobProgressListener._
 
 private[ui] case class OutputOpIdAndSparkJobId(outputOpId: OutputOpId, sparkJobId: SparkJobId)
@@ -30,8 +32,7 @@ private[ui] case class BatchUIData(
     val submissionTime: Long,
     val processingStartTime: Option[Long],
     val processingEndTime: Option[Long],
-    val numOutputOp: Int,
-    val failureReason: Map[Int, String],
+    val outputOperations: mutable.HashMap[OutputOpId, OutputOperationUIData] = mutable.HashMap(),
     var outputOpIdSparkJobIdPairs: Seq[OutputOpIdAndSparkJobId] = Seq.empty) {
 
   /**
@@ -61,19 +62,75 @@ private[ui] case class BatchUIData(
    * The number of recorders received by the receivers in this batch.
    */
   def numRecords: Long = streamIdToInputInfo.values.map(_.numRecords).sum
+
+  /**
+   * Update an output operation information of this batch.
+   */
+  def updateOutputOperationInfo(outputOperationInfo: OutputOperationInfo): Unit = {
+    assert(batchTime == outputOperationInfo.batchTime)
+    outputOperations(outputOperationInfo.id) = OutputOperationUIData(outputOperationInfo)
+  }
+
+  /**
+   * Return the number of failed output operations.
+   */
+  def numFailedOutputOp: Int = outputOperations.values.count(_.failureReason.nonEmpty)
+
+  /**
+   * Return the number of running output operations.
+   */
+  def numActiveOutputOp: Int = outputOperations.values.count(_.endTime.isEmpty)
+
+  /**
+   * Return the number of completed output operations.
+   */
+  def numCompletedOutputOp: Int = outputOperations.values.count {
+      op => op.failureReason.isEmpty && op.endTime.nonEmpty
+    }
+
+  /**
+   * Return if this batch has any output operations
+   */
+  def isFailed: Boolean = numFailedOutputOp != 0
 }
 
 private[ui] object BatchUIData {
 
   def apply(batchInfo: BatchInfo): BatchUIData = {
+    val outputOperations = mutable.HashMap[OutputOpId, OutputOperationUIData]()
+    outputOperations ++= batchInfo.outputOperationInfos.mapValues(OutputOperationUIData.apply)
     new BatchUIData(
       batchInfo.batchTime,
       batchInfo.streamIdToInputInfo,
       batchInfo.submissionTime,
       batchInfo.processingStartTime,
       batchInfo.processingEndTime,
-      batchInfo.numOutputOp,
-      batchInfo.failureReasons
+      outputOperations
+    )
+  }
+}
+
+private[ui] case class OutputOperationUIData(
+    id: OutputOpId,
+    name: String,
+    description: String,
+    startTime: Option[Long],
+    endTime: Option[Long],
+    failureReason: Option[String]) {
+
+  def duration: Option[Long] = for (s <- startTime; e <- endTime) yield e - s
+}
+
+private[ui] object OutputOperationUIData {
+
+  def apply(outputOperationInfo: OutputOperationInfo): OutputOperationUIData = {
+    OutputOperationUIData(
+      outputOperationInfo.id,
+      outputOperationInfo.name,
+      outputOperationInfo.description,
+      outputOperationInfo.startTime,
+      outputOperationInfo.endTime,
+      outputOperationInfo.failureReason
     )
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala
index 78aeb004e18b..f6cc6edf2569 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingJobProgressListener.scala
@@ -119,6 +119,20 @@ private[streaming] class StreamingJobProgressListener(ssc: StreamingContext)
     }
   }
 
+  override def onOutputOperationStarted(
+      outputOperationStarted: StreamingListenerOutputOperationStarted): Unit = synchronized {
+    // This method is called after onBatchStarted
+    runningBatchUIData(outputOperationStarted.outputOperationInfo.batchTime).
+      updateOutputOperationInfo(outputOperationStarted.outputOperationInfo)
+  }
+
+  override def onOutputOperationCompleted(
+      outputOperationCompleted: StreamingListenerOutputOperationCompleted): Unit = synchronized {
+    // This method is called before onBatchCompleted
+    runningBatchUIData(outputOperationCompleted.outputOperationInfo.batchTime).
+      updateOutputOperationInfo(outputOperationCompleted.outputOperationInfo)
+  }
+
   override def onJobStart(jobStart: SparkListenerJobStart): Unit = synchronized {
     getBatchTimeAndOutputOpId(jobStart.properties).foreach { case (batchTime, outputOpId) =>
       var outputOpIdToSparkJobIds = batchTimeToOutputOpIdSparkJobIdPair.get(batchTime)
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
index 2b43b7467042..5dc0472c7770 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.streaming
 
-import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
+import scala.collection.mutable.{ArrayBuffer, HashMap, SynchronizedBuffer, SynchronizedMap}
 import scala.concurrent.Future
 import scala.concurrent.ExecutionContext.Implicits.global
 
@@ -221,7 +221,7 @@ class StreamingListenerSuite extends TestSuiteBase with Matchers {
       }
     }
     _ssc.stop()
-    failureReasonsCollector.failureReasons
+    failureReasonsCollector.failureReasons.toMap
   }
 
   /** Check if a sequence of numbers is in increasing order */
@@ -307,14 +307,16 @@ class StreamingListenerSuiteReceiver extends Receiver[Any](StorageLevel.MEMORY_O
 }
 
 /**
- * A StreamingListener that saves the latest `failureReasons` in `BatchInfo` to the `failureReasons`
- * field.
+ * A StreamingListener that saves all latest `failureReasons` in a batch.
  */
 class FailureReasonsCollector extends StreamingListener {
 
-  @volatile var failureReasons: Map[Int, String] = null
+  val failureReasons = new HashMap[Int, String] with SynchronizedMap[Int, String]
 
-  override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted): Unit = {
-    failureReasons = batchCompleted.batchInfo.failureReasons
+  override def onOutputOperationCompleted(
+      outputOperationCompleted: StreamingListenerOutputOperationCompleted): Unit = {
+    outputOperationCompleted.outputOperationInfo.failureReason.foreach { f =>
+      failureReasons(outputOperationCompleted.outputOperationInfo.id) = f
+    }
   }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
index d1df78871d3b..a5744a9009c1 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/UISeleniumSuite.scala
@@ -117,7 +117,7 @@ class UISeleniumSuite
 
         findAll(cssSelector("""#active-batches-table th""")).map(_.text).toSeq should be {
           List("Batch Time", "Input Size", "Scheduling Delay (?)", "Processing Time (?)",
-            "Status")
+            "Output Ops: Succeeded/Total", "Status")
         }
         findAll(cssSelector("""#completed-batches-table th""")).map(_.text).toSeq should be {
           List("Batch Time", "Input Size", "Scheduling Delay (?)", "Processing Time (?)",
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
index 995f1197ccdf..af4718b4eb70 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
@@ -63,7 +63,7 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
       1 -> StreamInputInfo(1, 300L, Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "test")))
 
     // onBatchSubmitted
-    val batchInfoSubmitted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, None, None)
+    val batchInfoSubmitted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, None, None, Map.empty)
     listener.onBatchSubmitted(StreamingListenerBatchSubmitted(batchInfoSubmitted))
     listener.waitingBatches should be (List(BatchUIData(batchInfoSubmitted)))
     listener.runningBatches should be (Nil)
@@ -75,7 +75,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
     listener.numTotalReceivedRecords should be (0)
 
     // onBatchStarted
-    val batchInfoStarted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None)
+    val batchInfoStarted =
+      BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None, Map.empty)
     listener.onBatchStarted(StreamingListenerBatchStarted(batchInfoStarted))
     listener.waitingBatches should be (Nil)
     listener.runningBatches should be (List(BatchUIData(batchInfoStarted)))
@@ -116,7 +117,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
         OutputOpIdAndSparkJobId(1, 1))
 
     // onBatchCompleted
-    val batchInfoCompleted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None)
+    val batchInfoCompleted =
+      BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None, Map.empty)
     listener.onBatchCompleted(StreamingListenerBatchCompleted(batchInfoCompleted))
     listener.waitingBatches should be (Nil)
     listener.runningBatches should be (Nil)
@@ -156,7 +158,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
 
     val streamIdToInputInfo = Map(0 -> StreamInputInfo(0, 300L), 1 -> StreamInputInfo(1, 300L))
 
-    val batchInfoCompleted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None)
+    val batchInfoCompleted =
+      BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None, Map.empty)
 
     for(_ <- 0 until (limit + 10)) {
       listener.onBatchCompleted(StreamingListenerBatchCompleted(batchInfoCompleted))
@@ -173,8 +176,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
 
     // fulfill completedBatchInfos
     for(i <- 0 until limit) {
-      val batchInfoCompleted =
-        BatchInfo(Time(1000 + i * 100), Map.empty, 1000 + i * 100, Some(2000 + i * 100), None)
+      val batchInfoCompleted = BatchInfo(
+          Time(1000 + i * 100), Map.empty, 1000 + i * 100, Some(2000 + i * 100), None, Map.empty)
       listener.onBatchCompleted(StreamingListenerBatchCompleted(batchInfoCompleted))
       val jobStart = createJobStart(Time(1000 + i * 100), outputOpId = 0, jobId = 1)
       listener.onJobStart(jobStart)
@@ -185,7 +188,7 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
     listener.onJobStart(jobStart)
 
     val batchInfoSubmitted =
-      BatchInfo(Time(1000 + limit * 100), Map.empty, (1000 + limit * 100), None, None)
+      BatchInfo(Time(1000 + limit * 100), Map.empty, (1000 + limit * 100), None, None, Map.empty)
     listener.onBatchSubmitted(StreamingListenerBatchSubmitted(batchInfoSubmitted))
 
     // We still can see the info retrieved from onJobStart
@@ -201,8 +204,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
 
     // A lot of "onBatchCompleted"s happen before "onJobStart"
     for(i <- limit + 1 to limit * 2) {
-      val batchInfoCompleted =
-        BatchInfo(Time(1000 + i * 100), Map.empty, 1000 + i * 100, Some(2000 + i * 100), None)
+      val batchInfoCompleted = BatchInfo(
+          Time(1000 + i * 100), Map.empty, 1000 + i * 100, Some(2000 + i * 100), None, Map.empty)
       listener.onBatchCompleted(StreamingListenerBatchCompleted(batchInfoCompleted))
     }
 
@@ -227,11 +230,13 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
       val streamIdToInputInfo = Map(0 -> StreamInputInfo(0, 300L), 1 -> StreamInputInfo(1, 300L))
 
       // onBatchSubmitted
-      val batchInfoSubmitted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, None, None)
+      val batchInfoSubmitted =
+        BatchInfo(Time(1000), streamIdToInputInfo, 1000, None, None, Map.empty)
       listener.onBatchSubmitted(StreamingListenerBatchSubmitted(batchInfoSubmitted))
 
       // onBatchStarted
-      val batchInfoStarted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None)
+      val batchInfoStarted =
+        BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None, Map.empty)
       listener.onBatchStarted(StreamingListenerBatchStarted(batchInfoStarted))
 
       // onJobStart
@@ -248,7 +253,8 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
       listener.onJobStart(jobStart4)
 
       // onBatchCompleted
-      val batchInfoCompleted = BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None)
+      val batchInfoCompleted =
+        BatchInfo(Time(1000), streamIdToInputInfo, 1000, Some(2000), None, Map.empty)
       listener.onBatchCompleted(StreamingListenerBatchCompleted(batchInfoCompleted))
     }
 

From e1eef248f13f6c334fe4eea8a29a1de5470a2e62 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Fri, 16 Oct 2015 13:56:51 -0700
Subject: [PATCH 263/896] [SPARK-11104] [STREAMING] Fix a deadlock in
 StreamingContex.stop

The following deadlock may happen if shutdownHook and StreamingContext.stop are running at the same time.
```
Java stack information for the threads listed above:
===================================================
"Thread-2":
	at org.apache.spark.streaming.StreamingContext.stop(StreamingContext.scala:699)
	- waiting to lock <0x00000005405a1680> (a org.apache.spark.streaming.StreamingContext)
	at org.apache.spark.streaming.StreamingContext.org$apache$spark$streaming$StreamingContext$$stopOnShutdown(StreamingContext.scala:729)
	at org.apache.spark.streaming.StreamingContext$$anonfun$start$1.apply$mcV$sp(StreamingContext.scala:625)
	at org.apache.spark.util.SparkShutdownHook.run(ShutdownHookManager.scala:266)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(ShutdownHookManager.scala:236)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1$$anonfun$apply$mcV$sp$1.apply(ShutdownHookManager.scala:236)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1$$anonfun$apply$mcV$sp$1.apply(ShutdownHookManager.scala:236)
	at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1697)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1.apply$mcV$sp(ShutdownHookManager.scala:236)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1.apply(ShutdownHookManager.scala:236)
	at org.apache.spark.util.SparkShutdownHookManager$$anonfun$runAll$1.apply(ShutdownHookManager.scala:236)
	at scala.util.Try$.apply(Try.scala:161)
	at org.apache.spark.util.SparkShutdownHookManager.runAll(ShutdownHookManager.scala:236)
	- locked <0x00000005405b6a00> (a org.apache.spark.util.SparkShutdownHookManager)
	at org.apache.spark.util.SparkShutdownHookManager$$anon$2.run(ShutdownHookManager.scala:216)
	at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)
"main":
	at org.apache.spark.util.SparkShutdownHookManager.remove(ShutdownHookManager.scala:248)
	- waiting to lock <0x00000005405b6a00> (a org.apache.spark.util.SparkShutdownHookManager)
	at org.apache.spark.util.ShutdownHookManager$.removeShutdownHook(ShutdownHookManager.scala:199)
	at org.apache.spark.streaming.StreamingContext.stop(StreamingContext.scala:712)
	- locked <0x00000005405a1680> (a org.apache.spark.streaming.StreamingContext)
	at org.apache.spark.streaming.StreamingContext.stop(StreamingContext.scala:684)
	- locked <0x00000005405a1680> (a org.apache.spark.streaming.StreamingContext)
	at org.apache.spark.streaming.SessionByKeyBenchmark$.main(SessionByKeyBenchmark.scala:108)
	at org.apache.spark.streaming.SessionByKeyBenchmark.main(SessionByKeyBenchmark.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:680)
	at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
	at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
	at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
	at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
```

This PR just moved `ShutdownHookManager.removeShutdownHook` out of `synchronized` to avoid deadlock.

Author: zsxwing <zsxwing@gmail.com>

Closes #9116 from zsxwing/stop-deadlock.
---
 .../spark/streaming/StreamingContext.scala    | 55 +++++++++++--------
 1 file changed, 31 insertions(+), 24 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index 9b2632c22954..051f53de64cd 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -694,32 +694,39 @@ class StreamingContext private[streaming] (
    * @param stopGracefully if true, stops gracefully by waiting for the processing of all
    *                       received data to be completed
    */
-  def stop(stopSparkContext: Boolean, stopGracefully: Boolean): Unit = synchronized {
-    try {
-      state match {
-        case INITIALIZED =>
-          logWarning("StreamingContext has not been started yet")
-        case STOPPED =>
-          logWarning("StreamingContext has already been stopped")
-        case ACTIVE =>
-          scheduler.stop(stopGracefully)
-          // Removing the streamingSource to de-register the metrics on stop()
-          env.metricsSystem.removeSource(streamingSource)
-          uiTab.foreach(_.detach())
-          StreamingContext.setActiveContext(null)
-          waiter.notifyStop()
-          if (shutdownHookRef != null) {
-            ShutdownHookManager.removeShutdownHook(shutdownHookRef)
-          }
-          logInfo("StreamingContext stopped successfully")
+  def stop(stopSparkContext: Boolean, stopGracefully: Boolean): Unit = {
+    var shutdownHookRefToRemove: AnyRef = null
+    synchronized {
+      try {
+        state match {
+          case INITIALIZED =>
+            logWarning("StreamingContext has not been started yet")
+          case STOPPED =>
+            logWarning("StreamingContext has already been stopped")
+          case ACTIVE =>
+            scheduler.stop(stopGracefully)
+            // Removing the streamingSource to de-register the metrics on stop()
+            env.metricsSystem.removeSource(streamingSource)
+            uiTab.foreach(_.detach())
+            StreamingContext.setActiveContext(null)
+            waiter.notifyStop()
+            if (shutdownHookRef != null) {
+              shutdownHookRefToRemove = shutdownHookRef
+              shutdownHookRef = null
+            }
+            logInfo("StreamingContext stopped successfully")
+        }
+      } finally {
+        // The state should always be Stopped after calling `stop()`, even if we haven't started yet
+        state = STOPPED
       }
-      // Even if we have already stopped, we still need to attempt to stop the SparkContext because
-      // a user might stop(stopSparkContext = false) and then call stop(stopSparkContext = true).
-      if (stopSparkContext) sc.stop()
-    } finally {
-      // The state should always be Stopped after calling `stop()`, even if we haven't started yet
-      state = STOPPED
     }
+    if (shutdownHookRefToRemove != null) {
+      ShutdownHookManager.removeShutdownHook(shutdownHookRefToRemove)
+    }
+    // Even if we have already stopped, we still need to attempt to stop the SparkContext because
+    // a user might stop(stopSparkContext = false) and then call stop(stopSparkContext = true).
+    if (stopSparkContext) sc.stop()
   }
 
   private def stopOnShutdown(): Unit = {

From ac09a3a465f3b57f3964c5fd621ab0d2216e2354 Mon Sep 17 00:00:00 2001
From: gweidner <gweidner@us.ibm.com>
Date: Fri, 16 Oct 2015 14:02:12 -0700
Subject: [PATCH 264/896] [SPARK-11109] [CORE] Move FsHistoryProvider off
 deprecated AccessControlException

Switched from deprecated org.apache.hadoop.fs.permission.AccessControlException to org.apache.hadoop.security.AccessControlException.

Author: gweidner <gweidner@us.ibm.com>

Closes #9144 from gweidner/SPARK-11109.
---
 .../org/apache/spark/deploy/history/FsHistoryProvider.scala     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
index 5eb8adf97d90..80bfda9dddb3 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
@@ -27,7 +27,7 @@ import scala.collection.mutable
 import com.google.common.io.ByteStreams
 import com.google.common.util.concurrent.{MoreExecutors, ThreadFactoryBuilder}
 import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
-import org.apache.hadoop.fs.permission.AccessControlException
+import org.apache.hadoop.security.AccessControlException
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkException}
 import org.apache.spark.deploy.SparkHadoopUtil

From 1ec0a0dc2819d3db3555799cb78c2946f652bff4 Mon Sep 17 00:00:00 2001
From: Bhargav Mangipudi <bhargav.mangipudi@gmail.com>
Date: Fri, 16 Oct 2015 14:36:05 -0700
Subject: [PATCH 265/896] =?UTF-8?q?[SPARK-11050]=20[MLLIB]=20PySpark=20Spa?=
 =?UTF-8?q?rseVector=20can=20return=20wrong=20index=20in=20e=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…rror message

For negative indices in the SparseVector, we update the index value. If we have an incorrect index
at this point, the error message has the incorrect *updated* index instead of the original one. This
change contains the fix for the same.

Author: Bhargav Mangipudi <bhargav.mangipudi@gmail.com>

Closes #9069 from bhargav/spark-10759.
---
 python/pyspark/mllib/linalg/__init__.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index d903b9030d8c..5276eb41cf29 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -764,10 +764,11 @@ def __getitem__(self, index):
         if not isinstance(index, int):
             raise TypeError(
                 "Indices must be of type integer, got type %s" % type(index))
+
+        if index >= self.size or index < -self.size:
+            raise ValueError("Index %d out of bounds." % index)
         if index < 0:
             index += self.size
-        if index >= self.size or index < 0:
-            raise ValueError("Index %d out of bounds." % index)
 
         insert_index = np.searchsorted(inds, index)
         if insert_index >= inds.size:

From 10046ea76cf8f0d08fe7ef548e4dbec69d9c73b8 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Fri, 16 Oct 2015 15:30:07 -0700
Subject: [PATCH 266/896] [SPARK-10599] [MLLIB] Lower communication for block
 matrix multiplication

This PR aims to decrease communication costs in BlockMatrix multiplication in two ways:
 - Simulate the multiplication on the driver, and figure out which blocks actually need to be shuffled
 - Send the block once to a partition, and join inside the partition rather than sending multiple copies to the same partition

**NOTE**: One important note is that right now, the old behavior of checking for multiple blocks with the same index is lost. This is not hard to add, but is a little more expensive than how it was.

Initial benchmarking showed promising results (look below), however I did hit some `FileNotFound` exceptions with the new implementation after the shuffle.

Size A: 1e5 x 1e5
Size B: 1e5 x 1e5
Block Sizes: 1024 x 1024
Sparsity: 0.01
Old implementation: 1m 13s
New implementation: 9s

cc avulanov Would you be interested in helping me benchmark this? I used your code from the mailing list (which you sent about 3 months ago?), and the old implementation didn't even run, but the new implementation completed in 268s in a 120 GB / 16 core cluster

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #8757 from brkyvz/opt-bmm.
---
 .../linalg/distributed/BlockMatrix.scala      | 80 ++++++++++++++-----
 .../linalg/distributed/BlockMatrixSuite.scala | 18 +++++
 2 files changed, 76 insertions(+), 22 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
index a33b6137cf9c..81a6c0550bda 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
@@ -54,12 +54,14 @@ private[mllib] class GridPartitioner(
   /**
    * Returns the index of the partition the input coordinate belongs to.
    *
-   * @param key The coordinate (i, j) or a tuple (i, j, k), where k is the inner index used in
-   *            multiplication. k is ignored in computing partitions.
+   * @param key The partition id i (calculated through this method for coordinate (i, j) in
+   *            `simulateMultiply`, the coordinate (i, j) or a tuple (i, j, k), where k is
+   *            the inner index used in multiplication. k is ignored in computing partitions.
    * @return The index of the partition, which the coordinate belongs to.
    */
   override def getPartition(key: Any): Int = {
     key match {
+      case i: Int => i
       case (i: Int, j: Int) =>
         getPartitionId(i, j)
       case (i: Int, j: Int, _: Int) =>
@@ -352,12 +354,49 @@ class BlockMatrix @Since("1.3.0") (
     }
   }
 
+  /** Block (i,j) --> Set of destination partitions */
+  private type BlockDestinations = Map[(Int, Int), Set[Int]]
+
+  /**
+   * Simulate the multiplication with just block indices in order to cut costs on communication,
+   * when we are actually shuffling the matrices.
+   * The `colsPerBlock` of this matrix must equal the `rowsPerBlock` of `other`.
+   * Exposed for tests.
+   *
+   * @param other The BlockMatrix to multiply
+   * @param partitioner The partitioner that will be used for the resulting matrix `C = A * B`
+   * @return A tuple of [[BlockDestinations]]. The first element is the Map of the set of partitions
+   *         that we need to shuffle each blocks of `this`, and the second element is the Map for
+   *         `other`.
+   */
+  private[distributed] def simulateMultiply(
+      other: BlockMatrix,
+      partitioner: GridPartitioner): (BlockDestinations, BlockDestinations) = {
+    val leftMatrix = blockInfo.keys.collect() // blockInfo should already be cached
+    val rightMatrix = other.blocks.keys.collect()
+    val leftDestinations = leftMatrix.map { case (rowIndex, colIndex) =>
+      val rightCounterparts = rightMatrix.filter(_._1 == colIndex)
+      val partitions = rightCounterparts.map(b => partitioner.getPartition((rowIndex, b._2)))
+      ((rowIndex, colIndex), partitions.toSet)
+    }.toMap
+    val rightDestinations = rightMatrix.map { case (rowIndex, colIndex) =>
+      val leftCounterparts = leftMatrix.filter(_._2 == rowIndex)
+      val partitions = leftCounterparts.map(b => partitioner.getPartition((b._1, colIndex)))
+      ((rowIndex, colIndex), partitions.toSet)
+    }.toMap
+    (leftDestinations, rightDestinations)
+  }
+
   /**
    * Left multiplies this [[BlockMatrix]] to `other`, another [[BlockMatrix]]. The `colsPerBlock`
    * of this matrix must equal the `rowsPerBlock` of `other`. If `other` contains
    * [[SparseMatrix]], they will have to be converted to a [[DenseMatrix]]. The output
    * [[BlockMatrix]] will only consist of blocks of [[DenseMatrix]]. This may cause
    * some performance issues until support for multiplying two sparse matrices is added.
+   *
+   * Note: The behavior of multiply has changed in 1.6.0. `multiply` used to throw an error when
+   * there were blocks with duplicate indices. Now, the blocks with duplicate indices will be added
+   * with each other.
    */
   @Since("1.3.0")
   def multiply(other: BlockMatrix): BlockMatrix = {
@@ -368,33 +407,30 @@ class BlockMatrix @Since("1.3.0") (
     if (colsPerBlock == other.rowsPerBlock) {
       val resultPartitioner = GridPartitioner(numRowBlocks, other.numColBlocks,
         math.max(blocks.partitions.length, other.blocks.partitions.length))
-      // Each block of A must be multiplied with the corresponding blocks in each column of B.
-      // TODO: Optimize to send block to a partition once, similar to ALS
+      val (leftDestinations, rightDestinations) = simulateMultiply(other, resultPartitioner)
+      // Each block of A must be multiplied with the corresponding blocks in the columns of B.
       val flatA = blocks.flatMap { case ((blockRowIndex, blockColIndex), block) =>
-        Iterator.tabulate(other.numColBlocks)(j => ((blockRowIndex, j, blockColIndex), block))
+        val destinations = leftDestinations.getOrElse((blockRowIndex, blockColIndex), Set.empty)
+        destinations.map(j => (j, (blockRowIndex, blockColIndex, block)))
       }
       // Each block of B must be multiplied with the corresponding blocks in each row of A.
       val flatB = other.blocks.flatMap { case ((blockRowIndex, blockColIndex), block) =>
-        Iterator.tabulate(numRowBlocks)(i => ((i, blockColIndex, blockRowIndex), block))
+        val destinations = rightDestinations.getOrElse((blockRowIndex, blockColIndex), Set.empty)
+        destinations.map(j => (j, (blockRowIndex, blockColIndex, block)))
       }
-      val newBlocks: RDD[MatrixBlock] = flatA.cogroup(flatB, resultPartitioner)
-        .flatMap { case ((blockRowIndex, blockColIndex, _), (a, b)) =>
-          if (a.size > 1 || b.size > 1) {
-            throw new SparkException("There are multiple MatrixBlocks with indices: " +
-              s"($blockRowIndex, $blockColIndex). Please remove them.")
-          }
-          if (a.nonEmpty && b.nonEmpty) {
-            val C = b.head match {
-              case dense: DenseMatrix => a.head.multiply(dense)
-              case sparse: SparseMatrix => a.head.multiply(sparse.toDense)
-              case _ => throw new SparkException(s"Unrecognized matrix type ${b.head.getClass}.")
+      val newBlocks = flatA.cogroup(flatB, resultPartitioner).flatMap { case (pId, (a, b)) =>
+        a.flatMap { case (leftRowIndex, leftColIndex, leftBlock) =>
+          b.filter(_._1 == leftColIndex).map { case (rightRowIndex, rightColIndex, rightBlock) =>
+            val C = rightBlock match {
+              case dense: DenseMatrix => leftBlock.multiply(dense)
+              case sparse: SparseMatrix => leftBlock.multiply(sparse.toDense)
+              case _ =>
+                throw new SparkException(s"Unrecognized matrix type ${rightBlock.getClass}.")
             }
-            Iterator(((blockRowIndex, blockColIndex), C.toBreeze))
-          } else {
-            Iterator()
+            ((leftRowIndex, rightColIndex), C.toBreeze)
           }
-      }.reduceByKey(resultPartitioner, (a, b) => a + b)
-        .mapValues(Matrices.fromBreeze)
+        }
+      }.reduceByKey(resultPartitioner, (a, b) => a + b).mapValues(Matrices.fromBreeze)
       // TODO: Try to use aggregateByKey instead of reduceByKey to get rid of intermediate matrices
       new BlockMatrix(newBlocks, rowsPerBlock, other.colsPerBlock, numRows(), other.numCols())
     } else {
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrixSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrixSuite.scala
index 93fe04c139b9..b8eb10305801 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrixSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrixSuite.scala
@@ -235,6 +235,24 @@ class BlockMatrixSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(localC ~== result absTol 1e-8)
   }
 
+  test("simulate multiply") {
+    val blocks: Seq[((Int, Int), Matrix)] = Seq(
+      ((0, 0), new DenseMatrix(2, 2, Array(1.0, 0.0, 0.0, 1.0))),
+      ((1, 1), new DenseMatrix(2, 2, Array(1.0, 0.0, 0.0, 1.0))))
+    val rdd = sc.parallelize(blocks, 2)
+    val B = new BlockMatrix(rdd, colPerPart, rowPerPart)
+    val resultPartitioner = GridPartitioner(gridBasedMat.numRowBlocks, B.numColBlocks,
+      math.max(numPartitions, 2))
+    val (destinationsA, destinationsB) = gridBasedMat.simulateMultiply(B, resultPartitioner)
+    assert(destinationsA((0, 0)) === Set(0))
+    assert(destinationsA((0, 1)) === Set(2))
+    assert(destinationsA((1, 0)) === Set(0))
+    assert(destinationsA((1, 1)) === Set(2))
+    assert(destinationsA((2, 1)) === Set(3))
+    assert(destinationsB((0, 0)) === Set(0))
+    assert(destinationsB((1, 1)) === Set(2, 3))
+  }
+
   test("validate") {
     // No error
     gridBasedMat.validate()

From 8ac71d62d976bbfd0159cac6816dd8fa580ae1cb Mon Sep 17 00:00:00 2001
From: zero323 <matthew.szymkiewicz@gmail.com>
Date: Fri, 16 Oct 2015 15:53:26 -0700
Subject: [PATCH 267/896] [SPARK-11084] [ML] [PYTHON] Check if index can
 contain non-zero value before binary search

At this moment `SparseVector.__getitem__` executes `np.searchsorted` first and checks if result is in an expected range after that. It is possible to check if index can contain non-zero value before executing `np.searchsorted`.

Author: zero323 <matthew.szymkiewicz@gmail.com>

Closes #9098 from zero323/sparse_vector_getitem_improved.
---
 python/pyspark/mllib/linalg/__init__.py |  4 ++--
 python/pyspark/mllib/tests.py           | 10 ++++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/mllib/linalg/__init__.py b/python/pyspark/mllib/linalg/__init__.py
index 5276eb41cf29..ae9ce5845090 100644
--- a/python/pyspark/mllib/linalg/__init__.py
+++ b/python/pyspark/mllib/linalg/__init__.py
@@ -770,10 +770,10 @@ def __getitem__(self, index):
         if index < 0:
             index += self.size
 
-        insert_index = np.searchsorted(inds, index)
-        if insert_index >= inds.size:
+        if (inds.size == 0) or (index > inds.item(-1)):
             return 0.
 
+        insert_index = np.searchsorted(inds, index)
         row_ind = inds[insert_index]
         if row_ind == index:
             return vals[insert_index]
diff --git a/python/pyspark/mllib/tests.py b/python/pyspark/mllib/tests.py
index 2a6a5cd3fe40..2ad69a0ab1d3 100644
--- a/python/pyspark/mllib/tests.py
+++ b/python/pyspark/mllib/tests.py
@@ -252,6 +252,16 @@ def test_sparse_vector_indexing(self):
         for ind in [7.8, '1']:
             self.assertRaises(TypeError, sv.__getitem__, ind)
 
+        zeros = SparseVector(4, {})
+        self.assertEqual(zeros[0], 0.0)
+        self.assertEqual(zeros[3], 0.0)
+        for ind in [4, -5]:
+            self.assertRaises(ValueError, zeros.__getitem__, ind)
+
+        empty = SparseVector(0, {})
+        for ind in [-1, 0, 1]:
+            self.assertRaises(ValueError, empty.__getitem__, ind)
+
     def test_matrix_indexing(self):
         mat = DenseMatrix(3, 2, [0, 1, 4, 6, 8, 10])
         expected = [[0, 6], [1, 8], [4, 10]]

From e1e77b22b3b577909a12c3aa898eb53be02267fd Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Sat, 17 Oct 2015 10:04:19 -0700
Subject: [PATCH 268/896] [SPARK-11029] [ML] Add computeCost to KMeansModel in
 spark.ml

jira: https://issues.apache.org/jira/browse/SPARK-11029

We should add a method analogous to spark.mllib.clustering.KMeansModel.computeCost to spark.ml.clustering.KMeansModel.
This will be a temp fix until we have proper evaluators defined for clustering.

Author: Yuhao Yang <hhbyyh@gmail.com>
Author: yuhaoyang <yuhao@zhanglipings-iMac.local>

Closes #9073 from hhbyyh/computeCost.
---
 .../org/apache/spark/ml/clustering/KMeans.scala      | 12 ++++++++++++
 .../org/apache/spark/ml/clustering/KMeansSuite.scala |  1 +
 2 files changed, 13 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
index f40ab71fb22a..509be6300239 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
@@ -117,6 +117,18 @@ class KMeansModel private[ml] (
 
   @Since("1.5.0")
   def clusterCenters: Array[Vector] = parentModel.clusterCenters
+
+  /**
+   * Return the K-means cost (sum of squared distances of points to their nearest center) for this
+   * model on the given data.
+   */
+  // TODO: Replace the temp fix when we have proper evaluators defined for clustering.
+  @Since("1.6.0")
+  def computeCost(dataset: DataFrame): Double = {
+    SchemaUtils.checkColumnType(dataset.schema, $(featuresCol), new VectorUDT)
+    val data = dataset.select(col($(featuresCol))).map { case Row(point: Vector) => point }
+    parentModel.computeCost(data)
+  }
 }
 
 /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
index 688b0e31f91d..c05f90550d16 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
@@ -104,5 +104,6 @@ class KMeansSuite extends SparkFunSuite with MLlibTestSparkContext {
     val clusters = transformed.select(predictionColName).map(_.getInt(0)).distinct().collect().toSet
     assert(clusters.size === k)
     assert(clusters === Set(0, 1, 2, 3, 4))
+    assert(model.computeCost(dataset) < 0.1)
   }
 }

From cca2258685147be6c950c9f5c4e50eaa1e090714 Mon Sep 17 00:00:00 2001
From: Luvsandondov Lkhamsuren <lkhamsurenl@gmail.com>
Date: Sat, 17 Oct 2015 10:07:42 -0700
Subject: [PATCH 269/896] [SPARK-9963] [ML] RandomForest cleanup: replace
 predictNodeIndex with predictImpl

predictNodeIndex is moved to LearningNode and renamed predictImpl for consistency with Node.predictImpl

Author: Luvsandondov Lkhamsuren <lkhamsurenl@gmail.com>

Closes #8609 from lkhamsurenl/SPARK-9963.
---
 .../scala/org/apache/spark/ml/tree/Node.scala | 37 ++++++++++++++++
 .../spark/ml/tree/impl/RandomForest.scala     | 44 +------------------
 2 files changed, 38 insertions(+), 43 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
index cd2493129390..d89682611e3f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/Node.scala
@@ -279,6 +279,43 @@ private[tree] class LearningNode(
     }
   }
 
+  /**
+   * Get the node index corresponding to this data point.
+   * This function mimics prediction, passing an example from the root node down to a leaf
+   * or unsplit node; that node's index is returned.
+   *
+   * @param binnedFeatures  Binned feature vector for data point.
+   * @param splits possible splits for all features, indexed (numFeatures)(numSplits)
+   * @return  Leaf index if the data point reaches a leaf.
+   *          Otherwise, last node reachable in tree matching this example.
+   *          Note: This is the global node index, i.e., the index used in the tree.
+   *                This index is different from the index used during training a particular
+   *                group of nodes on one call to [[findBestSplits()]].
+   */
+  def predictImpl(binnedFeatures: Array[Int], splits: Array[Array[Split]]): Int = {
+    if (this.isLeaf || this.split.isEmpty) {
+      this.id
+    } else {
+      val split = this.split.get
+      val featureIndex = split.featureIndex
+      val splitLeft = split.shouldGoLeft(binnedFeatures(featureIndex), splits(featureIndex))
+      if (this.leftChild.isEmpty) {
+        // Not yet split. Return next layer of nodes to train
+        if (splitLeft) {
+          LearningNode.leftChildIndex(this.id)
+        } else {
+          LearningNode.rightChildIndex(this.id)
+        }
+      } else {
+        if (splitLeft) {
+          this.leftChild.get.predictImpl(binnedFeatures, splits)
+        } else {
+          this.rightChild.get.predictImpl(binnedFeatures, splits)
+        }
+      }
+    }
+  }
+
 }
 
 private[tree] object LearningNode {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
index c494556085e9..96d5652857e0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
@@ -205,47 +205,6 @@ private[ml] object RandomForest extends Logging {
     }
   }
 
-  /**
-   * Get the node index corresponding to this data point.
-   * This function mimics prediction, passing an example from the root node down to a leaf
-   * or unsplit node; that node's index is returned.
-   *
-   * @param node  Node in tree from which to classify the given data point.
-   * @param binnedFeatures  Binned feature vector for data point.
-   * @param splits possible splits for all features, indexed (numFeatures)(numSplits)
-   * @return  Leaf index if the data point reaches a leaf.
-   *          Otherwise, last node reachable in tree matching this example.
-   *          Note: This is the global node index, i.e., the index used in the tree.
-   *                This index is different from the index used during training a particular
-   *                group of nodes on one call to [[findBestSplits()]].
-   */
-  private def predictNodeIndex(
-      node: LearningNode,
-      binnedFeatures: Array[Int],
-      splits: Array[Array[Split]]): Int = {
-    if (node.isLeaf || node.split.isEmpty) {
-      node.id
-    } else {
-      val split = node.split.get
-      val featureIndex = split.featureIndex
-      val splitLeft = split.shouldGoLeft(binnedFeatures(featureIndex), splits(featureIndex))
-      if (node.leftChild.isEmpty) {
-        // Not yet split. Return index from next layer of nodes to train
-        if (splitLeft) {
-          LearningNode.leftChildIndex(node.id)
-        } else {
-          LearningNode.rightChildIndex(node.id)
-        }
-      } else {
-        if (splitLeft) {
-          predictNodeIndex(node.leftChild.get, binnedFeatures, splits)
-        } else {
-          predictNodeIndex(node.rightChild.get, binnedFeatures, splits)
-        }
-      }
-    }
-  }
-
   /**
    * Helper for binSeqOp, for data which can contain a mix of ordered and unordered features.
    *
@@ -453,8 +412,7 @@ private[ml] object RandomForest extends Logging {
         agg: Array[DTStatsAggregator],
         baggedPoint: BaggedPoint[TreePoint]): Array[DTStatsAggregator] = {
       treeToNodeToIndexInfo.foreach { case (treeIndex, nodeIndexToInfo) =>
-        val nodeIndex =
-          predictNodeIndex(topNodes(treeIndex), baggedPoint.datum.binnedFeatures, splits)
+        val nodeIndex = topNodes(treeIndex).predictImpl(baggedPoint.datum.binnedFeatures, splits)
         nodeBinSeqOp(treeIndex, nodeIndexToInfo.getOrElse(nodeIndex, null), agg, baggedPoint)
       }
       agg

From 254937420678a299f06b6f4e2696c623da56cf3a Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 17 Oct 2015 12:41:42 -0700
Subject: [PATCH 270/896] [SPARK-11165] Logging trait should be private - not
 DeveloperApi.

Its classdoc actually says; "NOTE: DO NOT USE this class outside of Spark. It is intended as an internal utility."

Author: Reynold Xin <rxin@databricks.com>

Closes #9155 from rxin/private-logging-trait.
---
 core/src/main/scala/org/apache/spark/Logging.scala | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/Logging.scala b/core/src/main/scala/org/apache/spark/Logging.scala
index f0598816d6c0..69f6e06ee005 100644
--- a/core/src/main/scala/org/apache/spark/Logging.scala
+++ b/core/src/main/scala/org/apache/spark/Logging.scala
@@ -21,11 +21,10 @@ import org.apache.log4j.{LogManager, PropertyConfigurator}
 import org.slf4j.{Logger, LoggerFactory}
 import org.slf4j.impl.StaticLoggerBinder
 
-import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.annotation.Private
 import org.apache.spark.util.Utils
 
 /**
- * :: DeveloperApi ::
  * Utility trait for classes that want to log data. Creates a SLF4J logger for the class and allows
  * logging messages at different levels using methods that only evaluate parameters lazily if the
  * log level is enabled.
@@ -33,7 +32,7 @@ import org.apache.spark.util.Utils
  * NOTE: DO NOT USE this class outside of Spark. It is intended as an internal utility.
  *       This will likely be changed or removed in future releases.
  */
-@DeveloperApi
+@Private
 trait Logging {
   // Make the log field transient so that objects with Logging can
   // be serialized and used on another machine

From 57f83e36d63bbd79663c49a6c1e8f6c3c8fe4789 Mon Sep 17 00:00:00 2001
From: Koert Kuipers <koert@tresata.com>
Date: Sat, 17 Oct 2015 14:56:24 -0700
Subject: [PATCH 271/896] [SPARK-10185] [SQL] Feat sql comma separated paths

Make sure comma-separated paths get processed correcly in ResolvedDataSource for a HadoopFsRelationProvider

Author: Koert Kuipers <koert@tresata.com>

Closes #8416 from koertkuipers/feat-sql-comma-separated-paths.
---
 python/pyspark/sql/readwriter.py              | 14 +++++-
 python/test_support/sql/people1.json          |  2 +
 .../apache/spark/sql/DataFrameReader.scala    | 11 +++++
 .../datasources/ResolvedDataSource.scala      | 47 +++++++++++++++----
 .../org/apache/spark/sql/DataFrameSuite.scala | 18 +++++++
 5 files changed, 81 insertions(+), 11 deletions(-)
 create mode 100644 python/test_support/sql/people1.json

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index f43d8bf646a9..93832d4c713e 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -116,6 +116,10 @@ def load(self, path=None, format=None, schema=None, **options):
         ...     opt2=1, opt3='str')
         >>> df.dtypes
         [('name', 'string'), ('year', 'int'), ('month', 'int'), ('day', 'int')]
+        >>> df = sqlContext.read.format('json').load(['python/test_support/sql/people.json',
+        ...     'python/test_support/sql/people1.json'])
+        >>> df.dtypes
+        [('age', 'bigint'), ('aka', 'string'), ('name', 'string')]
         """
         if format is not None:
             self.format(format)
@@ -123,7 +127,15 @@ def load(self, path=None, format=None, schema=None, **options):
             self.schema(schema)
         self.options(**options)
         if path is not None:
-            return self._df(self._jreader.load(path))
+            if type(path) == list:
+                paths = path
+                gateway = self._sqlContext._sc._gateway
+                jpaths = gateway.new_array(gateway.jvm.java.lang.String, len(paths))
+                for i in range(0, len(paths)):
+                    jpaths[i] = paths[i]
+                return self._df(self._jreader.load(jpaths))
+            else:
+                return self._df(self._jreader.load(path))
         else:
             return self._df(self._jreader.load())
 
diff --git a/python/test_support/sql/people1.json b/python/test_support/sql/people1.json
new file mode 100644
index 000000000000..6d217da77d15
--- /dev/null
+++ b/python/test_support/sql/people1.json
@@ -0,0 +1,2 @@
+{"name":"Jonathan", "aka": "John"}
+
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index eacdea2c1e5b..e8651a3569d6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -22,6 +22,7 @@ import java.util.Properties
 import scala.collection.JavaConverters._
 
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.util.StringUtils
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaRDD
@@ -123,6 +124,16 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
     DataFrame(sqlContext, LogicalRelation(resolved.relation))
   }
 
+  /**
+   * Loads input in as a [[DataFrame]], for data sources that support multiple paths.
+   * Only works if the source is a HadoopFsRelationProvider.
+   *
+   * @since 1.6.0
+   */
+  def load(paths: Array[String]): DataFrame = {
+    option("paths", paths.map(StringUtils.escapeString(_, '\\', ',')).mkString(",")).load()
+  }
+
   /**
    * Construct a [[DataFrame]] representing the database table accessible via JDBC URL
    * url named table and connection properties.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
index 011724436621..54beabbf63b5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
@@ -24,6 +24,7 @@ import scala.language.{existentials, implicitConversions}
 import scala.util.{Success, Failure, Try}
 
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.util.StringUtils
 
 import org.apache.spark.Logging
 import org.apache.spark.deploy.SparkHadoopUtil
@@ -89,7 +90,11 @@ object ResolvedDataSource extends Logging {
     val relation = userSpecifiedSchema match {
       case Some(schema: StructType) => clazz.newInstance() match {
         case dataSource: SchemaRelationProvider =>
-          dataSource.createRelation(sqlContext, new CaseInsensitiveMap(options), schema)
+          val caseInsensitiveOptions = new CaseInsensitiveMap(options)
+          if (caseInsensitiveOptions.contains("paths")) {
+            throw new AnalysisException(s"$className does not support paths option.")
+          }
+          dataSource.createRelation(sqlContext, caseInsensitiveOptions, schema)
         case dataSource: HadoopFsRelationProvider =>
           val maybePartitionsSchema = if (partitionColumns.isEmpty) {
             None
@@ -99,10 +104,19 @@ object ResolvedDataSource extends Logging {
 
           val caseInsensitiveOptions = new CaseInsensitiveMap(options)
           val paths = {
-            val patternPath = new Path(caseInsensitiveOptions("path"))
-            val fs = patternPath.getFileSystem(sqlContext.sparkContext.hadoopConfiguration)
-            val qualifiedPattern = patternPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
-            SparkHadoopUtil.get.globPathIfNecessary(qualifiedPattern).map(_.toString).toArray
+            if (caseInsensitiveOptions.contains("paths") &&
+              caseInsensitiveOptions.contains("path")) {
+              throw new AnalysisException(s"Both path and paths options are present.")
+            }
+            caseInsensitiveOptions.get("paths")
+              .map(_.split("(?<!\\\\),").map(StringUtils.unEscapeString(_, '\\', ',')))
+              .getOrElse(Array(caseInsensitiveOptions("path")))
+              .flatMap{ pathString =>
+                val hdfsPath = new Path(pathString)
+                val fs = hdfsPath.getFileSystem(sqlContext.sparkContext.hadoopConfiguration)
+                val qualified = hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
+                SparkHadoopUtil.get.globPathIfNecessary(qualified).map(_.toString)
+              }
           }
 
           val dataSchema =
@@ -122,14 +136,27 @@ object ResolvedDataSource extends Logging {
 
       case None => clazz.newInstance() match {
         case dataSource: RelationProvider =>
-          dataSource.createRelation(sqlContext, new CaseInsensitiveMap(options))
+          val caseInsensitiveOptions = new CaseInsensitiveMap(options)
+          if (caseInsensitiveOptions.contains("paths")) {
+            throw new AnalysisException(s"$className does not support paths option.")
+          }
+          dataSource.createRelation(sqlContext, caseInsensitiveOptions)
         case dataSource: HadoopFsRelationProvider =>
           val caseInsensitiveOptions = new CaseInsensitiveMap(options)
           val paths = {
-            val patternPath = new Path(caseInsensitiveOptions("path"))
-            val fs = patternPath.getFileSystem(sqlContext.sparkContext.hadoopConfiguration)
-            val qualifiedPattern = patternPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
-            SparkHadoopUtil.get.globPathIfNecessary(qualifiedPattern).map(_.toString).toArray
+            if (caseInsensitiveOptions.contains("paths") &&
+              caseInsensitiveOptions.contains("path")) {
+              throw new AnalysisException(s"Both path and paths options are present.")
+            }
+            caseInsensitiveOptions.get("paths")
+              .map(_.split("(?<!\\\\),").map(StringUtils.unEscapeString(_, '\\', ',')))
+              .getOrElse(Array(caseInsensitiveOptions("path")))
+              .flatMap{ pathString =>
+                val hdfsPath = new Path(pathString)
+                val fs = hdfsPath.getFileSystem(sqlContext.sparkContext.hadoopConfiguration)
+                val qualified = hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
+                SparkHadoopUtil.get.globPathIfNecessary(qualified).map(_.toString)
+              }
           }
           dataSource.createRelation(sqlContext, paths, None, None, caseInsensitiveOptions)
         case dataSource: org.apache.spark.sql.sources.SchemaRelationProvider =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index d919877746c7..832ea02cb6e7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -890,6 +890,24 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       .collect()
   }
 
+  test("SPARK-10185: Read multiple Hadoop Filesystem paths and paths with a comma in it") {
+    withTempDir { dir =>
+      val df1 = Seq((1, 22)).toDF("a", "b")
+      val dir1 = new File(dir, "dir,1").getCanonicalPath
+      df1.write.format("json").save(dir1)
+
+      val df2 = Seq((2, 23)).toDF("a", "b")
+      val dir2 = new File(dir, "dir2").getCanonicalPath
+      df2.write.format("json").save(dir2)
+
+      checkAnswer(sqlContext.read.format("json").load(Array(dir1, dir2)),
+        Row(1, 22) :: Row(2, 23) :: Nil)
+
+      checkAnswer(sqlContext.read.format("json").load(dir1),
+        Row(1, 22) :: Nil)
+    }
+  }
+
   test("SPARK-10034: Sort on Aggregate with aggregation expression named 'aggOrdering'") {
     val df = Seq(1 -> 2).toDF("i", "j")
     val query = df.groupBy('i)

From 022a8f6a1f7cb477a65a65482982c021ce08a73c Mon Sep 17 00:00:00 2001
From: ph <ph@plista.com>
Date: Sat, 17 Oct 2015 15:37:51 -0700
Subject: [PATCH 272/896] [SPARK-11129] [MESOS] Link Spark WebUI from Mesos
 WebUI

Mesos has a feature for linking to frameworks running on top of Mesos
from the Mesos WebUI. This commit enables Spark to make use of this
feature so one can directly visit the running Spark WebUIs from the
Mesos WebUI.

Author: ph <ph@plista.com>

Closes #9135 from philipphoffmann/SPARK-11129.
---
 .../cluster/mesos/CoarseMesosSchedulerBackend.scala        | 7 ++++++-
 .../scheduler/cluster/mesos/MesosSchedulerBackend.scala    | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
index 65cb5016cfcc..d10a77f8e5c7 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
@@ -127,7 +127,12 @@ private[spark] class CoarseMesosSchedulerBackend(
   override def start() {
     super.start()
     val driver = createSchedulerDriver(
-      master, CoarseMesosSchedulerBackend.this, sc.sparkUser, sc.appName, sc.conf)
+      master,
+      CoarseMesosSchedulerBackend.this,
+      sc.sparkUser,
+      sc.appName,
+      sc.conf,
+      sc.ui.map(_.appUIAddress))
     startScheduler(driver)
   }
 
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
index 8edf7007a5da..6196176c7cc3 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
@@ -68,7 +68,12 @@ private[spark] class MesosSchedulerBackend(
   override def start() {
     classLoader = Thread.currentThread.getContextClassLoader
     val driver = createSchedulerDriver(
-      master, MesosSchedulerBackend.this, sc.sparkUser, sc.appName, sc.conf)
+      master,
+      MesosSchedulerBackend.this,
+      sc.sparkUser,
+      sc.appName,
+      sc.conf,
+      sc.ui.map(_.appUIAddress))
     startScheduler(driver)
   }
 

From e2dfdbb2c0523517880138f214775f9a896f2271 Mon Sep 17 00:00:00 2001
From: huangzhaowei <carlmartinmax@gmail.com>
Date: Sat, 17 Oct 2015 16:41:49 -0700
Subject: [PATCH 273/896] [SPARK-11000] [YARN] Load `metadata.Hive` class only
 when `hive.metastore.uris` was set to avoid bootting the database twice

Author: huangzhaowei <carlmartinmax@gmail.com>

Closes #9026 from SaintBacchus/SPARK-11000.
---
 .../main/scala/org/apache/spark/deploy/yarn/Client.scala  | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 9fcfe362a3ba..08aecfa7f6fe 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -1327,11 +1327,8 @@ object Client extends Logging {
       val mirror = universe.runtimeMirror(getClass.getClassLoader)
 
       try {
-        val hiveClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.ql.metadata.Hive")
-        val hive = hiveClass.getMethod("get").invoke(null)
-
-        val hiveConf = hiveClass.getMethod("getConf").invoke(hive)
         val hiveConfClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.conf.HiveConf")
+        val hiveConf = hiveConfClass.newInstance()
 
         val hiveConfGet = (param: String) => Option(hiveConfClass
           .getMethod("get", classOf[java.lang.String])
@@ -1341,6 +1338,9 @@ object Client extends Logging {
 
         // Check for local metastore
         if (metastore_uri != None && metastore_uri.get.toString.size > 0) {
+          val hiveClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.ql.metadata.Hive")
+          val hive = hiveClass.getMethod("get").invoke(null, hiveConf.asInstanceOf[Object])
+
           val metastore_kerberos_principal_conf_var = mirror.classLoader
             .loadClass("org.apache.hadoop.hive.conf.HiveConf$ConfVars")
             .getField("METASTORE_KERBEROS_PRINCIPAL").get("varname").toString

From 3895b2113a726171b3c9c04fe41b3cc93d6d14b5 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Sun, 18 Oct 2015 02:12:56 -0700
Subject: [PATCH 274/896] [SPARK-11172] Close JsonParser/Generator in test

Author: tedyu <yuzhihong@gmail.com>

Closes #9157 from tedyu/master.
---
 .../sql/execution/datasources/json/JsonSuite.scala | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index b614e6c4148f..7540223bf277 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -47,13 +47,15 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
     val factory = new JsonFactory()
     def enforceCorrectType(value: Any, dataType: DataType): Any = {
       val writer = new StringWriter()
-      val generator = factory.createGenerator(writer)
-      generator.writeObject(value)
-      generator.flush()
+      Utils.tryWithResource(factory.createGenerator(writer)) { generator =>
+        generator.writeObject(value)
+        generator.flush()
+      }
 
-      val parser = factory.createParser(writer.toString)
-      parser.nextToken()
-      JacksonParser.convertField(factory, parser, dataType)
+      Utils.tryWithResource(factory.createParser(writer.toString)) { parser =>
+        parser.nextToken()
+        JacksonParser.convertField(factory, parser, dataType)
+      }
     }
 
     val intNumber: Int = 2147483647

From a112d69fdcd9f6d8805be6e0bc6d2211e26867c2 Mon Sep 17 00:00:00 2001
From: Lukasz Piepiora <lpiepiora@gmail.com>
Date: Sun, 18 Oct 2015 14:25:57 +0100
Subject: [PATCH 275/896] [SPARK-11174] [DOCS] Fix typo in the GraphX
 programming guide

This patch fixes a small typo in the GraphX programming guide

Author: Lukasz Piepiora <lpiepiora@gmail.com>

Closes #9160 from lpiepiora/11174-fix-typo-in-graphx-programming-guide.
---
 docs/graphx-programming-guide.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/graphx-programming-guide.md b/docs/graphx-programming-guide.md
index c861a763d622..6a512ab234bb 100644
--- a/docs/graphx-programming-guide.md
+++ b/docs/graphx-programming-guide.md
@@ -944,7 +944,7 @@ The three additional functions exposed by the `EdgeRDD` are:
 {% highlight scala %}
 // Transform the edge attributes while preserving the structure
 def mapValues[ED2](f: Edge[ED] => ED2): EdgeRDD[ED2]
-// Revere the edges reusing both attributes and structure
+// Reverse the edges reusing both attributes and structure
 def reverse: EdgeRDD[ED]
 // Join two `EdgeRDD`s partitioned using the same partitioning strategy.
 def innerJoin[ED2, ED3](other: EdgeRDD[ED2])(f: (VertexId, VertexId, ED, ED2) => ED3): EdgeRDD[ED3]

From 0480d6ca83d170618fa6a817ad64a2872438d47f Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sun, 18 Oct 2015 09:54:38 -0700
Subject: [PATCH 276/896] [SPARK-11169] Remove the extra spaces in merge script

Our merge script now turns
```
[SPARK-1234][SPARK-1235][SPARK-1236][SQL] description
```
into
```
[SPARK-1234] [SPARK-1235] [SPARK-1236] [SQL] description
```
The extra spaces are more annoying in git since the first line of a git commit is supposed to be very short.

Doctest passes with the following command:
```
python -m doctest merge_spark_pr.py
```

Author: Reynold Xin <rxin@databricks.com>

Closes #9156 from rxin/SPARK-11169.
---
 dev/merge_spark_pr.py | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/dev/merge_spark_pr.py b/dev/merge_spark_pr.py
index b9bdec3d7086..bf1a000f4679 100755
--- a/dev/merge_spark_pr.py
+++ b/dev/merge_spark_pr.py
@@ -300,24 +300,24 @@ def resolve_jira_issues(title, merge_branches, comment):
 def standardize_jira_ref(text):
     """
     Standardize the [SPARK-XXXXX] [MODULE] prefix
-    Converts "[SPARK-XXX][mllib] Issue", "[MLLib] SPARK-XXX. Issue" or "SPARK XXX [MLLIB]: Issue" to "[SPARK-XXX] [MLLIB] Issue"
+    Converts "[SPARK-XXX][mllib] Issue", "[MLLib] SPARK-XXX. Issue" or "SPARK XXX [MLLIB]: Issue" to "[SPARK-XXX][MLLIB] Issue"
 
     >>> standardize_jira_ref("[SPARK-5821] [SQL] ParquetRelation2 CTAS should check if delete is successful")
-    '[SPARK-5821] [SQL] ParquetRelation2 CTAS should check if delete is successful'
+    '[SPARK-5821][SQL] ParquetRelation2 CTAS should check if delete is successful'
     >>> standardize_jira_ref("[SPARK-4123][Project Infra][WIP]: Show new dependencies added in pull requests")
-    '[SPARK-4123] [PROJECT INFRA] [WIP] Show new dependencies added in pull requests'
+    '[SPARK-4123][PROJECT INFRA][WIP] Show new dependencies added in pull requests'
     >>> standardize_jira_ref("[MLlib] Spark  5954: Top by key")
-    '[SPARK-5954] [MLLIB] Top by key'
+    '[SPARK-5954][MLLIB] Top by key'
     >>> standardize_jira_ref("[SPARK-979] a LRU scheduler for load balancing in TaskSchedulerImpl")
     '[SPARK-979] a LRU scheduler for load balancing in TaskSchedulerImpl'
     >>> standardize_jira_ref("SPARK-1094 Support MiMa for reporting binary compatibility accross versions.")
     '[SPARK-1094] Support MiMa for reporting binary compatibility accross versions.'
     >>> standardize_jira_ref("[WIP]  [SPARK-1146] Vagrant support for Spark")
-    '[SPARK-1146] [WIP] Vagrant support for Spark'
+    '[SPARK-1146][WIP] Vagrant support for Spark'
     >>> standardize_jira_ref("SPARK-1032. If Yarn app fails before registering, app master stays aroun...")
     '[SPARK-1032] If Yarn app fails before registering, app master stays aroun...'
     >>> standardize_jira_ref("[SPARK-6250][SPARK-6146][SPARK-5911][SQL] Types are now reserved words in DDL parser.")
-    '[SPARK-6250] [SPARK-6146] [SPARK-5911] [SQL] Types are now reserved words in DDL parser.'
+    '[SPARK-6250][SPARK-6146][SPARK-5911][SQL] Types are now reserved words in DDL parser.'
     >>> standardize_jira_ref("Additional information for users building from source code")
     'Additional information for users building from source code'
     """
@@ -325,7 +325,7 @@ def standardize_jira_ref(text):
     components = []
 
     # If the string is compliant, no need to process any further
-    if (re.search(r'^\[SPARK-[0-9]{3,6}\] (\[[A-Z0-9_\s,]+\] )+\S+', text)):
+    if (re.search(r'^\[SPARK-[0-9]{3,6}\](\[[A-Z0-9_\s,]+\] )+\S+', text)):
         return text
 
     # Extract JIRA ref(s):
@@ -348,7 +348,7 @@ def standardize_jira_ref(text):
         text = pattern.search(text).groups()[0]
 
     # Assemble full text (JIRA ref(s), module(s), remaining text)
-    clean_text = ' '.join(jira_refs).strip() + " " + ' '.join(components).strip() + " " + text.strip()
+    clean_text = ''.join(jira_refs).strip() + ''.join(components).strip() + " " + text.strip()
 
     # Replace multiple spaces with a single space, e.g. if no jira refs and/or components were included
     clean_text = re.sub(r'\s+', ' ', clean_text.strip())

From 8d4449c7f5d528410306c288a042c4594b81a881 Mon Sep 17 00:00:00 2001
From: Patrick Wendell <patrick@databricks.com>
Date: Sun, 18 Oct 2015 10:36:50 -0700
Subject: [PATCH 277/896] MAINTENANCE: Automated closing of pull requests.

This commit exists to close the following pull requests on Github:

Closes #8737 (close requested by 'srowen')
Closes #5323 (close requested by 'JoshRosen')
Closes #6148 (close requested by 'JoshRosen')
Closes #7557 (close requested by 'JoshRosen')
Closes #7047 (close requested by 'srowen')
Closes #8713 (close requested by 'marmbrus')
Closes #5834 (close requested by 'srowen')
Closes #7467 (close requested by 'tdas')
Closes #8943 (close requested by 'xiaowen147')
Closes #4434 (close requested by 'JoshRosen')
Closes #8949 (close requested by 'srowen')
Closes #5368 (close requested by 'JoshRosen')
Closes #8186 (close requested by 'marmbrus')
Closes #5147 (close requested by 'JoshRosen')

From a337c235a12d4ea6a7d6db457acc6b32f1915241 Mon Sep 17 00:00:00 2001
From: Mahmoud Lababidi <mahmoud@thehumangeo.com>
Date: Sun, 18 Oct 2015 11:39:19 -0700
Subject: [PATCH 278/896] [SPARK-11158][SQL] Modified _verify_type() to be more
 informative on Errors by presenting the Object

The _verify_type() function had Errors that were raised when there were Type conversion issues but left out the Object in question. The Object is now added in the Error to reduce the strain on the user to debug through to figure out the Object that failed the Type conversion.

The use case for me was a Pandas DataFrame that contained 'nan' as values for columns of Strings.

Author: Mahmoud Lababidi <mahmoud@thehumangeo.com>
Author: Mahmoud Lababidi <lababidi@gmail.com>

Closes #9149 from lababidi/master.
---
 python/pyspark/sql/types.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/python/pyspark/sql/types.py b/python/pyspark/sql/types.py
index 1f86894855cb..5bc0773fa866 100644
--- a/python/pyspark/sql/types.py
+++ b/python/pyspark/sql/types.py
@@ -1127,15 +1127,15 @@ def _verify_type(obj, dataType):
         return
 
     _type = type(dataType)
-    assert _type in _acceptable_types, "unknown datatype: %s" % dataType
+    assert _type in _acceptable_types, "unknown datatype: %s for object %r" % (dataType, obj)
 
     if _type is StructType:
         if not isinstance(obj, (tuple, list)):
-            raise TypeError("StructType can not accept object in type %s" % type(obj))
+            raise TypeError("StructType can not accept object %r in type %s" % (obj, type(obj)))
     else:
         # subclass of them can not be fromInternald in JVM
         if type(obj) not in _acceptable_types[_type]:
-            raise TypeError("%s can not accept object in type %s" % (dataType, type(obj)))
+            raise TypeError("%s can not accept object %r in type %s" % (dataType, obj, type(obj)))
 
     if isinstance(dataType, ArrayType):
         for i in obj:

From 94c8fef296e5cdac9a93ed34acc079e51839caa7 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Sun, 18 Oct 2015 13:51:45 -0700
Subject: [PATCH 279/896] [SPARK-11126][SQL] Fix a memory leak in
 SQLListener._stageIdToStageMetrics

SQLListener adds all stage infos to `_stageIdToStageMetrics`, but only removes stage infos belonging to SQL executions. This PR fixed it by ignoring stages that don't belong to SQL executions.

Reported by Terry Hoo in https://www.mail-archive.com/userspark.apache.org/msg38810.html

Author: zsxwing <zsxwing@gmail.com>

Closes #9132 from zsxwing/SPARK-11126.
---
 .../spark/sql/execution/ui/SQLListener.scala   |  8 +++++++-
 .../sql/execution/ui/SQLListenerSuite.scala    | 18 ++++++++++++++++--
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
index b302b519998a..5a072de400b6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ui/SQLListener.scala
@@ -126,7 +126,13 @@ private[sql] class SQLListener(conf: SparkConf) extends SparkListener with Loggi
     val stageId = stageSubmitted.stageInfo.stageId
     val stageAttemptId = stageSubmitted.stageInfo.attemptId
     // Always override metrics for old stage attempt
-    _stageIdToStageMetrics(stageId) = new SQLStageMetrics(stageAttemptId)
+    if (_stageIdToStageMetrics.contains(stageId)) {
+      _stageIdToStageMetrics(stageId) = new SQLStageMetrics(stageAttemptId)
+    } else {
+      // If a stage belongs to some SQL execution, its stageId will be put in "onJobStart".
+      // Since "_stageIdToStageMetrics" doesn't contain it, it must not belong to any SQL execution.
+      // So we can ignore it. Otherwise, this may lead to memory leaks (SPARK-11126).
+    }
   }
 
   override def onTaskEnd(taskEnd: SparkListenerTaskEnd): Unit = synchronized {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
index cc1c1e10e98c..03bcee94a2b9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
@@ -313,7 +313,22 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
     assert(executionUIData.failedJobs === Seq(0))
   }
 
-  ignore("no memory leak") {
+  test("SPARK-11126: no memory leak when running non SQL jobs") {
+    val previousStageNumber = sqlContext.listener.stageIdToStageMetrics.size
+    sqlContext.sparkContext.parallelize(1 to 10).foreach(i => ())
+    // listener should ignore the non SQL stage
+    assert(sqlContext.listener.stageIdToStageMetrics.size == previousStageNumber)
+
+    sqlContext.sparkContext.parallelize(1 to 10).toDF().foreach(i => ())
+    // listener should save the SQL stage
+    assert(sqlContext.listener.stageIdToStageMetrics.size == previousStageNumber + 1)
+  }
+
+}
+
+class SQLListenerMemoryLeakSuite extends SparkFunSuite {
+
+  test("no memory leak") {
     val conf = new SparkConf()
       .setMaster("local")
       .setAppName("test")
@@ -348,5 +363,4 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
       sc.stop()
     }
   }
-
 }

From d3180c25d8cf0899a7238e7d24b35c5ae918cc1d Mon Sep 17 00:00:00 2001
From: Brennon York <brennon.york@capitalone.com>
Date: Sun, 18 Oct 2015 22:45:14 -0700
Subject: [PATCH 280/896] [SPARK-7018][BUILD] Refactor dev/run-tests-jenkins
 into Python

This commit refactors the `run-tests-jenkins` script into Python. This refactoring was done by brennonyork in #7401; this PR contains a few minor edits from joshrosen in order to bring it up to date with other recent changes.

From the original PR description (by brennonyork):

Currently a few things are left out that, could and I think should, be smaller JIRA's after this.

1. There are still a few areas where we use environment variables where we don't need to (like `CURRENT_BLOCK`). I might get around to fixing this one in lieu of everything else, but wanted to point that out.
2. The PR tests are still written in bash. I opted to not change those and just rewrite the runner into Python. This is a great follow-on JIRA IMO.
3. All of the linting scripts are still in bash as well and would likely do to just add those in as follow-on JIRA's as well.

Closes #7401.

Author: Brennon York <brennon.york@capitalone.com>

Closes #9161 from JoshRosen/run-tests-jenkins-refactoring.
---
 dev/lint-python                    |   2 +-
 dev/run-tests-codes.sh             |  30 ----
 dev/run-tests-jenkins              | 204 +-------------------------
 dev/run-tests-jenkins.py           | 228 +++++++++++++++++++++++++++++
 dev/run-tests.py                   |  20 +--
 dev/sparktestsupport/__init__.py   |  14 ++
 dev/sparktestsupport/shellutils.py |  37 ++++-
 python/run-tests.py                |  19 +--
 8 files changed, 285 insertions(+), 269 deletions(-)
 delete mode 100644 dev/run-tests-codes.sh
 create mode 100755 dev/run-tests-jenkins.py

diff --git a/dev/lint-python b/dev/lint-python
index 575dbb0ae321..0b97213ae3df 100755
--- a/dev/lint-python
+++ b/dev/lint-python
@@ -20,7 +20,7 @@
 SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
 SPARK_ROOT_DIR="$(dirname "$SCRIPT_DIR")"
 PATHS_TO_CHECK="./python/pyspark/ ./ec2/spark_ec2.py ./examples/src/main/python/ ./dev/sparktestsupport"
-PATHS_TO_CHECK="$PATHS_TO_CHECK ./dev/run-tests.py ./python/run-tests.py"
+PATHS_TO_CHECK="$PATHS_TO_CHECK ./dev/run-tests.py ./python/run-tests.py ./dev/run-tests-jenkins.py"
 PEP8_REPORT_PATH="$SPARK_ROOT_DIR/dev/pep8-report.txt"
 PYLINT_REPORT_PATH="$SPARK_ROOT_DIR/dev/pylint-report.txt"
 PYLINT_INSTALL_INFO="$SPARK_ROOT_DIR/dev/pylint-info.txt"
diff --git a/dev/run-tests-codes.sh b/dev/run-tests-codes.sh
deleted file mode 100644
index 1f16790522e7..000000000000
--- a/dev/run-tests-codes.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/env bash
-
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-readonly BLOCK_GENERAL=10
-readonly BLOCK_RAT=11
-readonly BLOCK_SCALA_STYLE=12
-readonly BLOCK_PYTHON_STYLE=13
-readonly BLOCK_R_STYLE=14
-readonly BLOCK_DOCUMENTATION=15
-readonly BLOCK_BUILD=16
-readonly BLOCK_MIMA=17
-readonly BLOCK_SPARK_UNIT_TESTS=18
-readonly BLOCK_PYSPARK_UNIT_TESTS=19
-readonly BLOCK_SPARKR_UNIT_TESTS=20
diff --git a/dev/run-tests-jenkins b/dev/run-tests-jenkins
index d3b05fa6df0c..e79accf9e987 100755
--- a/dev/run-tests-jenkins
+++ b/dev/run-tests-jenkins
@@ -22,207 +22,7 @@
 # Environment variables are populated by the code here:
 #+ https://github.com/jenkinsci/ghprb-plugin/blob/master/src/main/java/org/jenkinsci/plugins/ghprb/GhprbTrigger.java#L139
 
-# Go to the Spark project root directory
-FWDIR="$(cd `dirname $0`/..; pwd)"
+FWDIR="$(cd "`dirname $0`"/..; pwd)"
 cd "$FWDIR"
 
-source "$FWDIR/dev/run-tests-codes.sh"
-
-COMMENTS_URL="https://api.github.com/repos/apache/spark/issues/$ghprbPullId/comments"
-PULL_REQUEST_URL="https://github.com/apache/spark/pull/$ghprbPullId"
-
-# Important Environment Variables
-# ---
-# $ghprbActualCommit
-#+  This is the hash of the most recent commit in the PR.
-#+  The merge-base of this and master is the commit from which the PR was branched.
-# $sha1
-#+  If the patch merges cleanly, this is a reference to the merge commit hash
-#+    (e.g. "origin/pr/2606/merge").
-#+  If the patch does not merge cleanly, it is equal to $ghprbActualCommit.
-#+  The merge-base of this and master in the case of a clean merge is the most recent commit
-#+    against master.
-
-COMMIT_URL="https://github.com/apache/spark/commit/${ghprbActualCommit}"
-# GitHub doesn't auto-link short hashes when submitted via the API, unfortunately. :(
-SHORT_COMMIT_HASH="${ghprbActualCommit:0:7}"
-
-# format: http://linux.die.net/man/1/timeout
-# must be less than the timeout configured on Jenkins (currently 300m)
-TESTS_TIMEOUT="250m"
-
-# Array to capture all tests to run on the pull request. These tests are held under the
-#+ dev/tests/ directory.
-#
-# To write a PR test:
-#+  * the file must reside within the dev/tests directory
-#+  * be an executable bash script
-#+  * accept three arguments on the command line, the first being the Github PR long commit
-#+    hash, the second the Github SHA1 hash, and the final the current PR hash
-#+  * and, lastly, return string output to be included in the pr message output that will
-#+    be posted to Github
-PR_TESTS=(
-  "pr_merge_ability"
-  "pr_public_classes"
-# DISABLED (pwendell) "pr_new_dependencies"
-)
-
-function post_message () {
-  local message=$1
-  local data="{\"body\": \"$message\"}"
-  local HTTP_CODE_HEADER="HTTP Response Code: "
-
-  echo "Attempting to post to Github..."
-
-  local curl_output=$(
-    curl `#--dump-header -` \
-      --silent \
-      --user x-oauth-basic:$GITHUB_OAUTH_KEY \
-      --request POST \
-      --data "$data" \
-      --write-out "${HTTP_CODE_HEADER}%{http_code}\n" \
-      --header "Content-Type: application/json" \
-      "$COMMENTS_URL" #> /dev/null #| "$FWDIR/dev/jq" .id #| head -n 8
-  )
-  local curl_status=${PIPESTATUS[0]}
-
-  if [ "$curl_status" -ne 0 ]; then
-      echo "Failed to post message to GitHub." >&2
-      echo " > curl_status: ${curl_status}" >&2
-      echo " > curl_output: ${curl_output}" >&2
-      echo " > data: ${data}" >&2
-      # exit $curl_status
-  fi
-
-  local api_response=$(
-    echo "${curl_output}" \
-    | grep -v -e "^${HTTP_CODE_HEADER}"
-  )
-
-  local http_code=$(
-    echo "${curl_output}" \
-    | grep -e "^${HTTP_CODE_HEADER}" \
-    | sed -r -e "s/^${HTTP_CODE_HEADER}//g"
-  )
-
-  if [ -n "$http_code" ] && [ "$http_code" -ne "201" ]; then
-      echo " > http_code: ${http_code}." >&2
-      echo " > api_response: ${api_response}" >&2
-      echo " > data: ${data}" >&2
-  fi
-
-  if [ "$curl_status" -eq 0 ] && [ "$http_code" -eq "201" ]; then
-    echo " > Post successful."
-  fi
-}
-
-# post start message
-{
-  start_message="\
-  [Test build ${BUILD_DISPLAY_NAME} has started](${BUILD_URL}consoleFull) for \
-  PR $ghprbPullId at commit [\`${SHORT_COMMIT_HASH}\`](${COMMIT_URL})."
-
-  post_message "$start_message"
-}
-
-# Environment variable to capture PR test output
-pr_message=""
-# Ensure we save off the current HEAD to revert to
-current_pr_head="`git rev-parse HEAD`"
-
-echo "HEAD:  `git rev-parse HEAD`"
-echo "\$ghprbActualCommit: $ghprbActualCommit"
-echo "\$sha1:  $sha1"
-echo "\$ghprbPullTitle: $ghprbPullTitle"
-
-# Run pull request tests
-for t in "${PR_TESTS[@]}"; do
-  this_test="${FWDIR}/dev/tests/${t}.sh"
-  # Ensure the test can be found and is a file
-  if [ -f "${this_test}" ]; then
-    echo "Running test: $t"
-    this_mssg="$(bash "${this_test}" "${ghprbActualCommit}" "${sha1}" "${current_pr_head}")"
-    # Check if this is the merge test as we submit that note *before* and *after*
-    # the tests run
-    [ "$t" == "pr_merge_ability" ] && merge_note="${this_mssg}"
-    pr_message="${pr_message}\n${this_mssg}"
-    # Ensure, after each test, that we're back on the current PR
-    git checkout -f "${current_pr_head}" &>/dev/null
-  else
-    echo "Cannot find test ${this_test}."
-  fi
-done
-
-# run tests
-{
-  # Marks this build is a pull request build.
-  export AMP_JENKINS_PRB=true
-  if [[ $ghprbPullTitle == *"test-maven"* ]]; then
-    export AMPLAB_JENKINS_BUILD_TOOL="maven"
-  fi
-  if [[ $ghprbPullTitle == *"test-hadoop1.0"* ]]; then
-    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop1.0"
-  elif [[ $ghprbPullTitle == *"test-hadoop2.0"* ]]; then
-    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.0"
-  elif [[ $ghprbPullTitle == *"test-hadoop2.2"* ]]; then
-    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.2"
-  elif [[ $ghprbPullTitle == *"test-hadoop2.3"* ]]; then
-    export AMPLAB_JENKINS_BUILD_PROFILE="hadoop2.3"
-  fi
-
-  timeout "${TESTS_TIMEOUT}" ./dev/run-tests
-  test_result="$?"
-
-  if [ "$test_result" -eq "124" ]; then
-    fail_message="**[Test build ${BUILD_DISPLAY_NAME} timed out](${BUILD_URL}console)** \
-    for PR $ghprbPullId at commit [\`${SHORT_COMMIT_HASH}\`](${COMMIT_URL}) \
-    after a configured wait of \`${TESTS_TIMEOUT}\`."
-
-    post_message "$fail_message"
-    exit $test_result
-  elif [ "$test_result" -eq "0" ]; then
-    test_result_note=" * This patch **passes all tests**."
-  else
-    if [ "$test_result" -eq "$BLOCK_GENERAL" ]; then
-      failing_test="some tests"
-    elif [ "$test_result" -eq "$BLOCK_RAT" ]; then
-      failing_test="RAT tests"
-    elif [ "$test_result" -eq "$BLOCK_SCALA_STYLE" ]; then
-      failing_test="Scala style tests"
-    elif [ "$test_result" -eq "$BLOCK_PYTHON_STYLE" ]; then
-      failing_test="Python style tests"
-    elif [ "$test_result" -eq "$BLOCK_R_STYLE" ]; then
-      failing_test="R style tests"
-    elif [ "$test_result" -eq "$BLOCK_DOCUMENTATION" ]; then
-      failing_test="to generate documentation"
-    elif [ "$test_result" -eq "$BLOCK_BUILD" ]; then
-      failing_test="to build"
-    elif [ "$test_result" -eq "$BLOCK_MIMA" ]; then
-      failing_test="MiMa tests"
-    elif [ "$test_result" -eq "$BLOCK_SPARK_UNIT_TESTS" ]; then
-      failing_test="Spark unit tests"
-    elif [ "$test_result" -eq "$BLOCK_PYSPARK_UNIT_TESTS" ]; then
-      failing_test="PySpark unit tests"
-    elif [ "$test_result" -eq "$BLOCK_SPARKR_UNIT_TESTS" ]; then
-      failing_test="SparkR unit tests"
-    else
-      failing_test="some tests"
-    fi
-
-    test_result_note=" * This patch **fails $failing_test**."
-  fi
-}
-
-# post end message
-{
-  result_message="\
-  [Test build ${BUILD_DISPLAY_NAME} has finished](${BUILD_URL}console) for \
-  PR $ghprbPullId at commit [\`${SHORT_COMMIT_HASH}\`](${COMMIT_URL})."
-
-  result_message="${result_message}\n${test_result_note}"
-  result_message="${result_message}${pr_message}"
-
-  post_message "$result_message"
-}
-
-exit $test_result
+exec python -u ./dev/run-tests-jenkins.py "$@"
diff --git a/dev/run-tests-jenkins.py b/dev/run-tests-jenkins.py
new file mode 100755
index 000000000000..623004310e18
--- /dev/null
+++ b/dev/run-tests-jenkins.py
@@ -0,0 +1,228 @@
+#!/usr/bin/env python2
+
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+import os
+import sys
+import json
+import urllib2
+import functools
+import subprocess
+
+from sparktestsupport import SPARK_HOME, ERROR_CODES
+from sparktestsupport.shellutils import run_cmd
+
+
+def print_err(msg):
+    """
+    Given a set of arguments, will print them to the STDERR stream
+    """
+    print(msg, file=sys.stderr)
+
+
+def post_message_to_github(msg, ghprb_pull_id):
+    print("Attempting to post to Github...")
+
+    url = "https://api.github.com/repos/apache/spark/issues/" + ghprb_pull_id + "/comments"
+    github_oauth_key = os.environ["GITHUB_OAUTH_KEY"]
+
+    posted_message = json.dumps({"body": msg})
+    request = urllib2.Request(url,
+                              headers={
+                                  "Authorization": "token %s" % github_oauth_key,
+                                  "Content-Type": "application/json"
+                              },
+                              data=posted_message)
+    try:
+        response = urllib2.urlopen(request)
+
+        if response.getcode() == 201:
+            print(" > Post successful.")
+    except urllib2.HTTPError as http_e:
+        print_err("Failed to post message to Github.")
+        print_err(" > http_code: %s" % http_e.code)
+        print_err(" > api_response: %s" % http_e.read())
+        print_err(" > data: %s" % posted_message)
+    except urllib2.URLError as url_e:
+        print_err("Failed to post message to Github.")
+        print_err(" > urllib2_status: %s" % url_e.reason[1])
+        print_err(" > data: %s" % posted_message)
+
+
+def pr_message(build_display_name,
+               build_url,
+               ghprb_pull_id,
+               short_commit_hash,
+               commit_url,
+               msg,
+               post_msg=''):
+    # align the arguments properly for string formatting
+    str_args = (build_display_name,
+                msg,
+                build_url,
+                ghprb_pull_id,
+                short_commit_hash,
+                commit_url,
+                str(' ' + post_msg + '.') if post_msg else '.')
+    return '**[Test build %s %s](%sconsoleFull)** for PR %s at commit [`%s`](%s)%s' % str_args
+
+
+def run_pr_checks(pr_tests, ghprb_actual_commit, sha1):
+    """
+    Executes a set of pull request checks to ease development and report issues with various
+    components such as style, linting, dependencies, compatibilities, etc.
+    @return a list of messages to post back to Github
+    """
+    # Ensure we save off the current HEAD to revert to
+    current_pr_head = run_cmd(['git', 'rev-parse', 'HEAD'], return_output=True).strip()
+    pr_results = list()
+
+    for pr_test in pr_tests:
+        test_name = pr_test + '.sh'
+        pr_results.append(run_cmd(['bash', os.path.join(SPARK_HOME, 'dev', 'tests', test_name),
+                                   ghprb_actual_commit, sha1],
+                                  return_output=True).rstrip())
+        # Ensure, after each test, that we're back on the current PR
+        run_cmd(['git', 'checkout', '-f', current_pr_head])
+    return pr_results
+
+
+def run_tests(tests_timeout):
+    """
+    Runs the `dev/run-tests` script and responds with the correct error message
+    under the various failure scenarios.
+    @return a tuple containing the test result code and the result note to post to Github
+    """
+
+    test_result_code = subprocess.Popen(['timeout',
+                                         tests_timeout,
+                                         os.path.join(SPARK_HOME, 'dev', 'run-tests')]).wait()
+
+    failure_note_by_errcode = {
+        1: 'executing the `dev/run-tests` script',  # error to denote run-tests script failures
+        ERROR_CODES["BLOCK_GENERAL"]: 'some tests',
+        ERROR_CODES["BLOCK_RAT"]: 'RAT tests',
+        ERROR_CODES["BLOCK_SCALA_STYLE"]: 'Scala style tests',
+        ERROR_CODES["BLOCK_PYTHON_STYLE"]: 'Python style tests',
+        ERROR_CODES["BLOCK_R_STYLE"]: 'R style tests',
+        ERROR_CODES["BLOCK_DOCUMENTATION"]: 'to generate documentation',
+        ERROR_CODES["BLOCK_BUILD"]: 'to build',
+        ERROR_CODES["BLOCK_MIMA"]: 'MiMa tests',
+        ERROR_CODES["BLOCK_SPARK_UNIT_TESTS"]: 'Spark unit tests',
+        ERROR_CODES["BLOCK_PYSPARK_UNIT_TESTS"]: 'PySpark unit tests',
+        ERROR_CODES["BLOCK_SPARKR_UNIT_TESTS"]: 'SparkR unit tests',
+        ERROR_CODES["BLOCK_TIMEOUT"]: 'from timeout after a configured wait of \`%s\`' % (
+            tests_timeout)
+    }
+
+    if test_result_code == 0:
+        test_result_note = ' * This patch passes all tests.'
+    else:
+        test_result_note = ' * This patch **fails %s**.' % failure_note_by_errcode[test_result_code]
+
+    return [test_result_code, test_result_note]
+
+
+def main():
+    # Important Environment Variables
+    # ---
+    # $ghprbActualCommit
+    #   This is the hash of the most recent commit in the PR.
+    #   The merge-base of this and master is the commit from which the PR was branched.
+    # $sha1
+    #   If the patch merges cleanly, this is a reference to the merge commit hash
+    #     (e.g. "origin/pr/2606/merge").
+    #   If the patch does not merge cleanly, it is equal to $ghprbActualCommit.
+    #   The merge-base of this and master in the case of a clean merge is the most recent commit
+    #     against master.
+    ghprb_pull_id = os.environ["ghprbPullId"]
+    ghprb_actual_commit = os.environ["ghprbActualCommit"]
+    ghprb_pull_title = os.environ["ghprbPullTitle"]
+    sha1 = os.environ["sha1"]
+
+    # Marks this build as a pull request build.
+    os.environ["AMP_JENKINS_PRB"] = "true"
+    # Switch to a Maven-based build if the PR title contains "test-maven":
+    if "test-maven" in ghprb_pull_title:
+        os.environ["AMPLAB_JENKINS_BUILD_TOOL"] = "maven"
+    # Switch the Hadoop profile based on the PR title:
+    if "test-hadoop1.0" in ghprb_pull_title:
+        os.environ["AMPLAB_JENKINS_BUILD_PROFILE"] = "hadoop1.0"
+    if "test-hadoop2.2" in ghprb_pull_title:
+        os.environ["AMPLAB_JENKINS_BUILD_PROFILE"] = "hadoop2.0"
+    if "test-hadoop2.2" in ghprb_pull_title:
+        os.environ["AMPLAB_JENKINS_BUILD_PROFILE"] = "hadoop2.2"
+    if "test-hadoop2.3" in ghprb_pull_title:
+        os.environ["AMPLAB_JENKINS_BUILD_PROFILE"] = "hadoop2.3"
+
+    build_display_name = os.environ["BUILD_DISPLAY_NAME"]
+    build_url = os.environ["BUILD_URL"]
+
+    commit_url = "https://github.com/apache/spark/commit/" + ghprb_actual_commit
+
+    # GitHub doesn't auto-link short hashes when submitted via the API, unfortunately. :(
+    short_commit_hash = ghprb_actual_commit[0:7]
+
+    # format: http://linux.die.net/man/1/timeout
+    # must be less than the timeout configured on Jenkins (currently 300m)
+    tests_timeout = "250m"
+
+    # Array to capture all test names to run on the pull request. These tests are represented
+    # by their file equivalents in the dev/tests/ directory.
+    #
+    # To write a PR test:
+    #   * the file must reside within the dev/tests directory
+    #   * be an executable bash script
+    #   * accept three arguments on the command line, the first being the Github PR long commit
+    #     hash, the second the Github SHA1 hash, and the final the current PR hash
+    #   * and, lastly, return string output to be included in the pr message output that will
+    #     be posted to Github
+    pr_tests = [
+        "pr_merge_ability",
+        "pr_public_classes"
+        # DISABLED (pwendell) "pr_new_dependencies"
+    ]
+
+    # `bind_message_base` returns a function to generate messages for Github posting
+    github_message = functools.partial(pr_message,
+                                       build_display_name,
+                                       build_url,
+                                       ghprb_pull_id,
+                                       short_commit_hash,
+                                       commit_url)
+
+    # post start message
+    post_message_to_github(github_message('has started'), ghprb_pull_id)
+
+    pr_check_results = run_pr_checks(pr_tests, ghprb_actual_commit, sha1)
+
+    test_result_code, test_result_note = run_tests(tests_timeout)
+
+    # post end message
+    result_message = github_message('has finished')
+    result_message += '\n' + test_result_note + '\n'
+    result_message += '\n'.join(pr_check_results)
+
+    post_message_to_github(result_message, ghprb_pull_id)
+
+    sys.exit(test_result_code)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/dev/run-tests.py b/dev/run-tests.py
index d4d6880491bc..6b4b71073453 100755
--- a/dev/run-tests.py
+++ b/dev/run-tests.py
@@ -27,10 +27,11 @@
 import subprocess
 from collections import namedtuple
 
-from sparktestsupport import SPARK_HOME, USER_HOME
+from sparktestsupport import SPARK_HOME, USER_HOME, ERROR_CODES
 from sparktestsupport.shellutils import exit_from_command_with_retcode, run_cmd, rm_r, which
 import sparktestsupport.modules as modules
 
+
 # -------------------------------------------------------------------------------------------------
 # Functions for traversing module dependency graph
 # -------------------------------------------------------------------------------------------------
@@ -130,19 +131,6 @@ def determine_tags_to_exclude(changed_modules):
 # Functions for working with subprocesses and shell tools
 # -------------------------------------------------------------------------------------------------
 
-def get_error_codes(err_code_file):
-    """Function to retrieve all block numbers from the `run-tests-codes.sh`
-    file to maintain backwards compatibility with the `run-tests-jenkins`
-    script"""
-
-    with open(err_code_file, 'r') as f:
-        err_codes = [e.split()[1].strip().split('=')
-                     for e in f if e.startswith("readonly")]
-        return dict(err_codes)
-
-
-ERROR_CODES = get_error_codes(os.path.join(SPARK_HOME, "dev/run-tests-codes.sh"))
-
 
 def determine_java_executable():
     """Will return the path of the java executable that will be used by Spark's
@@ -191,7 +179,7 @@ def determine_java_version(java_exe):
 
 
 def set_title_and_block(title, err_block):
-    os.environ["CURRENT_BLOCK"] = ERROR_CODES[err_block]
+    os.environ["CURRENT_BLOCK"] = str(ERROR_CODES[err_block])
     line_str = '=' * 72
 
     print('')
@@ -467,7 +455,7 @@ def main():
     rm_r(os.path.join(USER_HOME, ".ivy2", "local", "org.apache.spark"))
     rm_r(os.path.join(USER_HOME, ".ivy2", "cache", "org.apache.spark"))
 
-    os.environ["CURRENT_BLOCK"] = ERROR_CODES["BLOCK_GENERAL"]
+    os.environ["CURRENT_BLOCK"] = str(ERROR_CODES["BLOCK_GENERAL"])
 
     java_exe = determine_java_executable()
 
diff --git a/dev/sparktestsupport/__init__.py b/dev/sparktestsupport/__init__.py
index 12696d98fb98..8ab6d9e37ca2 100644
--- a/dev/sparktestsupport/__init__.py
+++ b/dev/sparktestsupport/__init__.py
@@ -19,3 +19,17 @@
 
 SPARK_HOME = os.path.abspath(os.path.join(os.path.dirname(os.path.realpath(__file__)), "../../"))
 USER_HOME = os.environ.get("HOME")
+ERROR_CODES = {
+    "BLOCK_GENERAL": 10,
+    "BLOCK_RAT": 11,
+    "BLOCK_SCALA_STYLE": 12,
+    "BLOCK_PYTHON_STYLE": 13,
+    "BLOCK_R_STYLE": 14,
+    "BLOCK_DOCUMENTATION": 15,
+    "BLOCK_BUILD": 16,
+    "BLOCK_MIMA": 17,
+    "BLOCK_SPARK_UNIT_TESTS": 18,
+    "BLOCK_PYSPARK_UNIT_TESTS": 19,
+    "BLOCK_SPARKR_UNIT_TESTS": 20,
+    "BLOCK_TIMEOUT": 124
+}
diff --git a/dev/sparktestsupport/shellutils.py b/dev/sparktestsupport/shellutils.py
index 12bd0bf3a4fe..d280e797077d 100644
--- a/dev/sparktestsupport/shellutils.py
+++ b/dev/sparktestsupport/shellutils.py
@@ -22,6 +22,36 @@
 import sys
 
 
+if sys.version_info >= (2, 7):
+    subprocess_check_output = subprocess.check_output
+    subprocess_check_call = subprocess.check_call
+else:
+    # SPARK-8763
+    # backported from subprocess module in Python 2.7
+    def subprocess_check_output(*popenargs, **kwargs):
+        if 'stdout' in kwargs:
+            raise ValueError('stdout argument not allowed, it will be overridden.')
+        process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
+        output, unused_err = process.communicate()
+        retcode = process.poll()
+        if retcode:
+            cmd = kwargs.get("args")
+            if cmd is None:
+                cmd = popenargs[0]
+            raise subprocess.CalledProcessError(retcode, cmd, output=output)
+        return output
+
+    # backported from subprocess module in Python 2.7
+    def subprocess_check_call(*popenargs, **kwargs):
+        retcode = call(*popenargs, **kwargs)
+        if retcode:
+            cmd = kwargs.get("args")
+            if cmd is None:
+                cmd = popenargs[0]
+            raise CalledProcessError(retcode, cmd)
+        return 0
+
+
 def exit_from_command_with_retcode(cmd, retcode):
     print("[error] running", ' '.join(cmd), "; received return code", retcode)
     sys.exit(int(os.environ.get("CURRENT_BLOCK", 255)))
@@ -39,7 +69,7 @@ def rm_r(path):
         os.remove(path)
 
 
-def run_cmd(cmd):
+def run_cmd(cmd, return_output=False):
     """
     Given a command as a list of arguments will attempt to execute the command
     and, on failure, print an error message and exit.
@@ -48,7 +78,10 @@ def run_cmd(cmd):
     if not isinstance(cmd, list):
         cmd = cmd.split()
     try:
-        subprocess.check_call(cmd)
+        if return_output:
+            return subprocess_check_output(cmd)
+        else:
+            return subprocess_check_call(cmd)
     except subprocess.CalledProcessError as e:
         exit_from_command_with_retcode(e.cmd, e.returncode)
 
diff --git a/python/run-tests.py b/python/run-tests.py
index 152f5cc98d0f..f5857f8c6221 100755
--- a/python/run-tests.py
+++ b/python/run-tests.py
@@ -31,23 +31,6 @@
     import Queue
 else:
     import queue as Queue
-if sys.version_info >= (2, 7):
-    subprocess_check_output = subprocess.check_output
-else:
-    # SPARK-8763
-    # backported from subprocess module in Python 2.7
-    def subprocess_check_output(*popenargs, **kwargs):
-        if 'stdout' in kwargs:
-            raise ValueError('stdout argument not allowed, it will be overridden.')
-        process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
-        output, unused_err = process.communicate()
-        retcode = process.poll()
-        if retcode:
-            cmd = kwargs.get("args")
-            if cmd is None:
-                cmd = popenargs[0]
-            raise subprocess.CalledProcessError(retcode, cmd, output=output)
-        return output
 
 
 # Append `SPARK_HOME/dev` to the Python path so that we can import the sparktestsupport module
@@ -55,7 +38,7 @@ def subprocess_check_output(*popenargs, **kwargs):
 
 
 from sparktestsupport import SPARK_HOME  # noqa (suppress pep8 warnings)
-from sparktestsupport.shellutils import which  # noqa
+from sparktestsupport.shellutils import which, subprocess_check_output  # noqa
 from sparktestsupport.modules import all_modules  # noqa
 
 

From beb8bc1ea588b7f9ab7effff707c0f784421364d Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Mon, 19 Oct 2015 00:06:51 -0700
Subject: [PATCH 281/896] [SPARK-11126][SQL] Fix the potential flaky test

The unit test added in #9132 is flaky. This is a follow up PR to add `listenerBus.waitUntilEmpty` to fix it.

Author: zsxwing <zsxwing@gmail.com>

Closes #9163 from zsxwing/SPARK-11126-follow-up.
---
 .../org/apache/spark/sql/execution/ui/SQLListenerSuite.scala    | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
index 03bcee94a2b9..c15aac775096 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ui/SQLListenerSuite.scala
@@ -316,10 +316,12 @@ class SQLListenerSuite extends SparkFunSuite with SharedSQLContext {
   test("SPARK-11126: no memory leak when running non SQL jobs") {
     val previousStageNumber = sqlContext.listener.stageIdToStageMetrics.size
     sqlContext.sparkContext.parallelize(1 to 10).foreach(i => ())
+    sqlContext.sparkContext.listenerBus.waitUntilEmpty(10000)
     // listener should ignore the non SQL stage
     assert(sqlContext.listener.stageIdToStageMetrics.size == previousStageNumber)
 
     sqlContext.sparkContext.parallelize(1 to 10).toDF().foreach(i => ())
+    sqlContext.sparkContext.listenerBus.waitUntilEmpty(10000)
     // listener should save the SQL stage
     assert(sqlContext.listener.stageIdToStageMetrics.size == previousStageNumber + 1)
   }

From bd64c2d550c36405f9be25a5c6a8eaa54bf4e7e7 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Mon, 19 Oct 2015 09:59:18 +0100
Subject: [PATCH 282/896] =?UTF-8?q?[SPARK-10921][YARN]=20Completely=20remo?=
 =?UTF-8?q?ve=20the=20use=20of=20SparkContext.prefer=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…redNodeLocationData

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #8976 from jaceklaskowski/SPARK-10921.
---
 .../scala/org/apache/spark/SparkContext.scala | 22 +++++--------------
 project/MimaExcludes.scala                    |  3 +++
 .../spark/deploy/yarn/ApplicationMaster.scala |  1 -
 .../spark/deploy/yarn/YarnRMClient.scala      |  2 --
 4 files changed, 9 insertions(+), 19 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 0c72adfb9505..ccba3ed9e643 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -90,11 +90,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   // NOTE: this must be placed at the beginning of the SparkContext constructor.
   SparkContext.markPartiallyConstructed(this, allowMultipleContexts)
 
-  // This is used only by YARN for now, but should be relevant to other cluster types (Mesos,
-  // etc) too. This is typically generated from InputFormatInfo.computePreferredLocations. It
-  // contains a map from hostname to a list of input format splits on the host.
-  private[spark] var preferredNodeLocationData: Map[String, Set[SplitInfo]] = Map()
-
   val startTime = System.currentTimeMillis()
 
   private[spark] val stopped: AtomicBoolean = new AtomicBoolean(false)
@@ -116,16 +111,13 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    * Alternative constructor for setting preferred locations where Spark will create executors.
    *
    * @param config a [[org.apache.spark.SparkConf]] object specifying other Spark parameters
-   * @param preferredNodeLocationData used in YARN mode to select nodes to launch containers on.
-   * Can be generated using [[org.apache.spark.scheduler.InputFormatInfo.computePreferredLocations]]
-   * from a list of input files or InputFormats for the application.
+   * @param preferredNodeLocationData not used. Left for backward compatibility.
    */
   @deprecated("Passing in preferred locations has no effect at all, see SPARK-8949", "1.5.0")
   @DeveloperApi
   def this(config: SparkConf, preferredNodeLocationData: Map[String, Set[SplitInfo]]) = {
     this(config)
     logWarning("Passing in preferred locations has no effect at all, see SPARK-8949")
-    this.preferredNodeLocationData = preferredNodeLocationData
   }
 
   /**
@@ -147,10 +139,9 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    * @param jars Collection of JARs to send to the cluster. These can be paths on the local file
    *             system or HDFS, HTTP, HTTPS, or FTP URLs.
    * @param environment Environment variables to set on worker nodes.
-   * @param preferredNodeLocationData used in YARN mode to select nodes to launch containers on.
-   * Can be generated using [[org.apache.spark.scheduler.InputFormatInfo.computePreferredLocations]]
-   * from a list of input files or InputFormats for the application.
+   * @param preferredNodeLocationData not used. Left for backward compatibility.
    */
+  @deprecated("Passing in preferred locations has no effect at all, see SPARK-10921", "1.6.0")
   def this(
       master: String,
       appName: String,
@@ -163,7 +154,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     if (preferredNodeLocationData.nonEmpty) {
       logWarning("Passing in preferred locations has no effect at all, see SPARK-8949")
     }
-    this.preferredNodeLocationData = preferredNodeLocationData
   }
 
   // NOTE: The below constructors could be consolidated using default arguments. Due to
@@ -177,7 +167,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    * @param appName A name for your application, to display on the cluster web UI.
    */
   private[spark] def this(master: String, appName: String) =
-    this(master, appName, null, Nil, Map(), Map())
+    this(master, appName, null, Nil, Map())
 
   /**
    * Alternative constructor that allows setting common Spark properties directly
@@ -187,7 +177,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    * @param sparkHome Location where Spark is installed on cluster nodes.
    */
   private[spark] def this(master: String, appName: String, sparkHome: String) =
-    this(master, appName, sparkHome, Nil, Map(), Map())
+    this(master, appName, sparkHome, Nil, Map())
 
   /**
    * Alternative constructor that allows setting common Spark properties directly
@@ -199,7 +189,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    *             system or HDFS, HTTP, HTTPS, or FTP URLs.
    */
   private[spark] def this(master: String, appName: String, sparkHome: String, jars: Seq[String]) =
-    this(master, appName, sparkHome, jars, Map(), Map())
+    this(master, appName, sparkHome, jars, Map())
 
   // log out Spark Version in Spark driver log
   logInfo(s"Running Spark version $SPARK_VERSION")
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 08e4a449cf76..0872d3f3e709 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -100,6 +100,9 @@ object MimaExcludes {
           "org.apache.spark.sql.SQLContext.setSession"),
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.sql.SQLContext.createSession")
+      ) ++ Seq(
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.SparkContext.preferredNodeLocationData_=")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 3791eea5bf17..d1d248bf79be 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -255,7 +255,6 @@ private[spark] class ApplicationMaster(
       driverRef,
       yarnConf,
       _sparkConf,
-      if (sc != null) sc.preferredNodeLocationData else Map(),
       uiAddress,
       historyAddress,
       securityMgr)
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnRMClient.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnRMClient.scala
index df042bf291de..d2a211f6711f 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnRMClient.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnRMClient.scala
@@ -49,7 +49,6 @@ private[spark] class YarnRMClient(args: ApplicationMasterArguments) extends Logg
    *
    * @param conf The Yarn configuration.
    * @param sparkConf The Spark configuration.
-   * @param preferredNodeLocations Map with hints about where to allocate containers.
    * @param uiAddress Address of the SparkUI.
    * @param uiHistoryAddress Address of the application on the History Server.
    */
@@ -58,7 +57,6 @@ private[spark] class YarnRMClient(args: ApplicationMasterArguments) extends Logg
       driverRef: RpcEndpointRef,
       conf: YarnConfiguration,
       sparkConf: SparkConf,
-      preferredNodeLocations: Map[String, Set[SplitInfo]],
       uiAddress: String,
       uiHistoryAddress: String,
       securityMgr: SecurityManager

From dfa41e63b98c28b087c56f94658b5e99e8a7758c Mon Sep 17 00:00:00 2001
From: Alex Angelini <alex.louis.angelini@gmail.com>
Date: Mon, 19 Oct 2015 10:07:39 -0700
Subject: [PATCH 283/896] [SPARK-9643] Upgrade pyrolite to 4.9

Includes: https://github.com/irmen/Pyrolite/pull/23 which fixes datetimes with timezones.

JoshRosen

https://issues.apache.org/jira/browse/SPARK-9643

Author: Alex Angelini <alex.louis.angelini@gmail.com>

Closes #7950 from angelini/upgrade_pyrolite_up.
---
 core/pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/pom.xml b/core/pom.xml
index c0af98a04fb1..fdcb6a7902bb 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -339,7 +339,7 @@
     <dependency>
       <groupId>net.razorvine</groupId>
       <artifactId>pyrolite</artifactId>
-      <version>4.4</version>
+      <version>4.9</version>
       <exclusions>
         <exclusion>
           <groupId>net.razorvine</groupId>

From 4c33a34ba3167ae67fdb4978ea2166ce65638fb9 Mon Sep 17 00:00:00 2001
From: lewuathe <lewuathe@me.com>
Date: Mon, 19 Oct 2015 10:46:10 -0700
Subject: [PATCH 284/896] =?UTF-8?q?[SPARK-10668]=20[ML]=20Use=20WeightedLe?=
 =?UTF-8?q?astSquares=20in=20LinearRegression=20with=20L=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…2 regularization if the number of features is small

Author: lewuathe <lewuathe@me.com>
Author: Lewuathe <sasaki@treasure-data.com>
Author: Kai Sasaki <sasaki@treasure-data.com>
Author: Lewuathe <lewuathe@me.com>

Closes #8884 from Lewuathe/SPARK-10668.
---
 R/pkg/R/mllib.R                               |    5 +-
 R/pkg/inst/tests/test_mllib.R                 |    2 +-
 .../ml/param/shared/SharedParamsCodeGen.scala |    4 +-
 .../spark/ml/param/shared/sharedParams.scala  |   17 +
 .../apache/spark/ml/r/SparkRWrappers.scala    |    4 +-
 .../ml/regression/LinearRegression.scala      |   50 +-
 .../regression/JavaLinearRegressionSuite.java |    3 +-
 .../ml/regression/LinearRegressionSuite.scala | 1045 +++++++++--------
 .../spark/ml/tuning/CrossValidatorSuite.scala |    2 +-
 .../ml/tuning/TrainValidationSplitSuite.scala |    2 +-
 10 files changed, 640 insertions(+), 494 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index cd00bbbeec69..25615e805e03 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -45,11 +45,12 @@ setClass("PipelineModel", representation(model = "jobj"))
 #' summary(model)
 #'}
 setMethod("glm", signature(formula = "formula", family = "ANY", data = "DataFrame"),
-          function(formula, family = c("gaussian", "binomial"), data, lambda = 0, alpha = 0) {
+          function(formula, family = c("gaussian", "binomial"), data, lambda = 0, alpha = 0,
+            solver = "auto") {
             family <- match.arg(family)
             model <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
                                  "fitRModelFormula", deparse(formula), data@sdf, family, lambda,
-                                 alpha)
+                                 alpha, solver)
             return(new("PipelineModel", model = model))
           })
 
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 032f8ec68b9d..3331ce738358 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -59,7 +59,7 @@ test_that("feature interaction vs native glm", {
 
 test_that("summary coefficients match with native glm", {
   training <- createDataFrame(sqlContext, iris)
-  stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training))
+  stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training, solver = "l-bfgs"))
   coefs <- as.vector(stats$coefficients)
   rCoefs <- as.vector(coef(glm(Sepal.Width ~ Sepal.Length + Species, data = iris)))
   expect_true(all(abs(rCoefs - coefs) < 1e-6))
diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala b/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
index 8cb6b5493c61..c7bca1243092 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/shared/SharedParamsCodeGen.scala
@@ -73,7 +73,9 @@ private[shared] object SharedParamsCodeGen {
       ParamDesc[Double]("tol", "the convergence tolerance for iterative algorithms"),
       ParamDesc[Double]("stepSize", "Step size to be used for each iteration of optimization."),
       ParamDesc[String]("weightCol", "weight column name. If this is not set or empty, we treat " +
-        "all instance weights as 1.0."))
+        "all instance weights as 1.0."),
+      ParamDesc[String]("solver", "the solver algorithm for optimization. If this is not set or " +
+        "empty, default value is 'auto'.", Some("\"auto\"")))
 
     val code = genSharedParams(params)
     val file = "src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala"
diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala b/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
index e3625212e525..cb2a060a34dd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/shared/sharedParams.scala
@@ -357,4 +357,21 @@ private[ml] trait HasWeightCol extends Params {
   /** @group getParam */
   final def getWeightCol: String = $(weightCol)
 }
+
+/**
+ * Trait for shared param solver (default: "auto").
+ */
+private[ml] trait HasSolver extends Params {
+
+  /**
+   * Param for the solver algorithm for optimization. If this is not set or empty, default value is 'auto'..
+   * @group param
+   */
+  final val solver: Param[String] = new Param[String](this, "solver", "the solver algorithm for optimization. If this is not set or empty, default value is 'auto'.")
+
+  setDefault(solver, "auto")
+
+  /** @group getParam */
+  final def getSolver: String = $(solver)
+}
 // scalastyle:on
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index f5a022c31ed9..fec61fed3cb9 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -30,13 +30,15 @@ private[r] object SparkRWrappers {
       df: DataFrame,
       family: String,
       lambda: Double,
-      alpha: Double): PipelineModel = {
+      alpha: Double,
+      solver: String): PipelineModel = {
     val formula = new RFormula().setFormula(value)
     val estimator = family match {
       case "gaussian" => new LinearRegression()
         .setRegParam(lambda)
         .setElasticNetParam(alpha)
         .setFitIntercept(formula.hasIntercept)
+        .setSolver(solver)
       case "binomial" => new LogisticRegression()
         .setRegParam(lambda)
         .setElasticNetParam(alpha)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index dd09667ef5a0..573a61a6eabd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -25,6 +25,7 @@ import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS,
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.ml.feature.Instance
+import org.apache.spark.ml.optim.WeightedLeastSquares
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.param.shared._
@@ -43,7 +44,7 @@ import org.apache.spark.storage.StorageLevel
  */
 private[regression] trait LinearRegressionParams extends PredictorParams
     with HasRegParam with HasElasticNetParam with HasMaxIter with HasTol
-    with HasFitIntercept with HasStandardization with HasWeightCol
+    with HasFitIntercept with HasStandardization with HasWeightCol with HasSolver
 
 /**
  * :: Experimental ::
@@ -130,9 +131,53 @@ class LinearRegression(override val uid: String)
   def setWeightCol(value: String): this.type = set(weightCol, value)
   setDefault(weightCol -> "")
 
+  /**
+   * Set the solver algorithm used for optimization.
+   * In case of linear regression, this can be "l-bfgs", "normal" and "auto".
+   * The default value is "auto" which means that the solver algorithm is
+   * selected automatically.
+   * @group setParam
+   */
+  def setSolver(value: String): this.type = set(solver, value)
+  setDefault(solver -> "auto")
+
   override protected def train(dataset: DataFrame): LinearRegressionModel = {
-    // Extract columns from data.  If dataset is persisted, do not persist instances.
+    // Extract the number of features before deciding optimization solver.
+    val numFeatures = dataset.select(col($(featuresCol))).limit(1).map {
+      case Row(features: Vector) => features.size
+    }.toArray()(0)
     val w = if ($(weightCol).isEmpty) lit(1.0) else col($(weightCol))
+
+    if (($(solver) == "auto" && $(elasticNetParam) == 0.0 && numFeatures <= 4096) ||
+      $(solver) == "normal") {
+      require($(elasticNetParam) == 0.0, "Only L2 regularization can be used when normal " +
+        "solver is used.'")
+      // For low dimensional data, WeightedLeastSquares is more efficiently since the
+      // training algorithm only requires one pass through the data. (SPARK-10668)
+      val instances: RDD[WeightedLeastSquares.Instance] = dataset.select(
+        col($(labelCol)), w, col($(featuresCol))).map {
+          case Row(label: Double, weight: Double, features: Vector) =>
+            WeightedLeastSquares.Instance(weight, features, label)
+      }
+
+      val optimizer = new WeightedLeastSquares($(fitIntercept), $(regParam),
+        $(standardization), true)
+      val model = optimizer.fit(instances)
+      // When it is trained by WeightedLeastSquares, training summary does not
+      // attached returned model.
+      val lrModel = copyValues(new LinearRegressionModel(uid, model.coefficients, model.intercept))
+      // WeightedLeastSquares does not run through iterations. So it does not generate
+      // an objective history.
+      val (summaryModel, predictionColName) = lrModel.findSummaryModelAndPredictionCol()
+      val trainingSummary = new LinearRegressionTrainingSummary(
+        summaryModel.transform(dataset),
+        predictionColName,
+        $(labelCol),
+        $(featuresCol),
+        Array(0D))
+      return lrModel.setSummary(trainingSummary)
+    }
+
     val instances: RDD[Instance] = dataset.select(col($(labelCol)), w, col($(featuresCol))).map {
       case Row(label: Double, weight: Double, features: Vector) =>
         Instance(label, weight, features)
@@ -155,7 +200,6 @@ class LinearRegression(override val uid: String)
         new MultivariateOnlineSummarizer, new MultivariateOnlineSummarizer)(seqOp, combOp)
     }
 
-    val numFeatures = featuresSummarizer.mean.size
     val yMean = ySummarizer.mean(0)
     val yStd = math.sqrt(ySummarizer.variance(0))
 
diff --git a/mllib/src/test/java/org/apache/spark/ml/regression/JavaLinearRegressionSuite.java b/mllib/src/test/java/org/apache/spark/ml/regression/JavaLinearRegressionSuite.java
index 91c589d00abd..4fb0b0d1092b 100644
--- a/mllib/src/test/java/org/apache/spark/ml/regression/JavaLinearRegressionSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/regression/JavaLinearRegressionSuite.java
@@ -61,6 +61,7 @@ public void tearDown() {
   public void linearRegressionDefaultParams() {
     LinearRegression lr = new LinearRegression();
     assertEquals("label", lr.getLabelCol());
+    assertEquals("auto", lr.getSolver());
     LinearRegressionModel model = lr.fit(dataset);
     model.transform(dataset).registerTempTable("prediction");
     DataFrame predictions = jsql.sql("SELECT label, prediction FROM prediction");
@@ -75,7 +76,7 @@ public void linearRegressionWithSetters() {
     // Set params, train, and check as many params as we can.
     LinearRegression lr = new LinearRegression()
         .setMaxIter(10)
-        .setRegParam(1.0);
+        .setRegParam(1.0).setSolver("l-bfgs");
     LinearRegressionModel model = lr.fit(dataset);
     LinearRegression parent = (LinearRegression) model.parent();
     assertEquals(10, parent.getMaxIter());
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 73a0a5caf864..a6e0c72ba903 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -31,6 +31,7 @@ import org.apache.spark.sql.{DataFrame, Row}
 
 class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
 
+  private val seed: Int = 42
   @transient var dataset: DataFrame = _
   @transient var datasetWithoutIntercept: DataFrame = _
 
@@ -50,15 +51,14 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     super.beforeAll()
     dataset = sqlContext.createDataFrame(
       sc.parallelize(LinearDataGenerator.generateLinearInput(
-        6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, 42, 0.1), 2))
+        6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, seed, 0.1), 2))
     /*
        datasetWithoutIntercept is not needed for correctness testing but is useful for illustrating
        training model without intercept
      */
     datasetWithoutIntercept = sqlContext.createDataFrame(
       sc.parallelize(LinearDataGenerator.generateLinearInput(
-        0.0, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, 42, 0.1), 2))
-
+        0.0, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, seed, 0.1), 2))
   }
 
   test("params") {
@@ -76,6 +76,7 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(lir.getElasticNetParam === 0.0)
     assert(lir.getFitIntercept)
     assert(lir.getStandardization)
+    assert(lir.getSolver == "auto")
     val model = lir.fit(dataset)
 
     // copied model must have the same parent.
@@ -93,525 +94,603 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   }
 
   test("linear regression with intercept without regularization") {
-    val trainer1 = new LinearRegression
-    // The result should be the same regardless of standardization without regularization
-    val trainer2 = (new LinearRegression).setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       Using the following R code to load the data and train the model using glmnet package.
-
-       library("glmnet")
-       data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
-       features <- as.matrix(data.frame(as.numeric(data$V2), as.numeric(data$V3)))
-       label <- as.numeric(data$V1)
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         6.298698
-       as.numeric.data.V2. 4.700706
-       as.numeric.data.V3. 7.199082
-     */
-    val interceptR = 6.298698
-    val weightsR = Vectors.dense(4.700706, 7.199082)
-
-    assert(model1.intercept ~== interceptR relTol 1E-3)
-    assert(model1.weights ~= weightsR relTol 1E-3)
-    assert(model2.intercept ~== interceptR relTol 1E-3)
-    assert(model2.weights ~= weightsR relTol 1E-3)
-
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = new LinearRegression().setSolver(solver)
+      // The result should be the same regardless of standardization without regularization
+      val trainer2 = (new LinearRegression).setStandardization(false).setSolver(solver)
+      val model1 = trainer1.fit(dataset)
+      val model2 = trainer2.fit(dataset)
+
+      /*
+         Using the following R code to load the data and train the model using glmnet package.
+
+         library("glmnet")
+         data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
+         features <- as.matrix(data.frame(as.numeric(data$V2), as.numeric(data$V3)))
+         label <- as.numeric(data$V1)
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         6.298698
+         as.numeric.data.V2. 4.700706
+         as.numeric.data.V3. 7.199082
+       */
+      val interceptR = 6.298698
+      val weightsR = Vectors.dense(4.700706, 7.199082)
+
+      assert(model1.intercept ~== interceptR relTol 1E-3)
+      assert(model1.weights ~= weightsR relTol 1E-3)
+      assert(model2.intercept ~== interceptR relTol 1E-3)
+      assert(model2.weights ~= weightsR relTol 1E-3)
+
+      model1.transform(dataset).select("features", "prediction").collect().foreach {
+        case Row(features: DenseVector, prediction1: Double) =>
+          val prediction2 =
+            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+          assert(prediction1 ~== prediction2 relTol 1E-5)
+      }
     }
   }
 
   test("linear regression without intercept without regularization") {
-    val trainer1 = (new LinearRegression).setFitIntercept(false)
-    // Without regularization the results should be the same
-    val trainer2 = (new LinearRegression).setFitIntercept(false).setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val modelWithoutIntercept1 = trainer1.fit(datasetWithoutIntercept)
-    val model2 = trainer2.fit(dataset)
-    val modelWithoutIntercept2 = trainer2.fit(datasetWithoutIntercept)
-
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0,
-         intercept = FALSE))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         .
-       as.numeric.data.V2. 6.995908
-       as.numeric.data.V3. 5.275131
-     */
-    val weightsR = Vectors.dense(6.995908, 5.275131)
-
-    assert(model1.intercept ~== 0 absTol 1E-3)
-    assert(model1.weights ~= weightsR relTol 1E-3)
-    assert(model2.intercept ~== 0 absTol 1E-3)
-    assert(model2.weights ~= weightsR relTol 1E-3)
-
-    /*
-       Then again with the data with no intercept:
-       > weightsWithoutIntercept
-       3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)           .
-       as.numeric.data3.V2. 4.70011
-       as.numeric.data3.V3. 7.19943
-     */
-    val weightsWithoutInterceptR = Vectors.dense(4.70011, 7.19943)
-
-    assert(modelWithoutIntercept1.intercept ~== 0 absTol 1E-3)
-    assert(modelWithoutIntercept1.weights ~= weightsWithoutInterceptR relTol 1E-3)
-    assert(modelWithoutIntercept2.intercept ~== 0 absTol 1E-3)
-    assert(modelWithoutIntercept2.weights ~= weightsWithoutInterceptR relTol 1E-3)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setFitIntercept(false).setSolver(solver)
+      // Without regularization the results should be the same
+      val trainer2 = (new LinearRegression).setFitIntercept(false).setStandardization(false)
+        .setSolver(solver)
+      val model1 = trainer1.fit(dataset)
+      val modelWithoutIntercept1 = trainer1.fit(datasetWithoutIntercept)
+      val model2 = trainer2.fit(dataset)
+      val modelWithoutIntercept2 = trainer2.fit(datasetWithoutIntercept)
+
+      /*
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0,
+           intercept = FALSE))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         .
+         as.numeric.data.V2. 6.995908
+         as.numeric.data.V3. 5.275131
+       */
+      val weightsR = Vectors.dense(6.995908, 5.275131)
+
+      assert(model1.intercept ~== 0 absTol 1E-3)
+      assert(model1.weights ~= weightsR relTol 1E-3)
+      assert(model2.intercept ~== 0 absTol 1E-3)
+      assert(model2.weights ~= weightsR relTol 1E-3)
+
+      /*
+         Then again with the data with no intercept:
+         > weightsWithoutIntercept
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)           .
+         as.numeric.data3.V2. 4.70011
+         as.numeric.data3.V3. 7.19943
+       */
+      val weightsWithoutInterceptR = Vectors.dense(4.70011, 7.19943)
+
+      assert(modelWithoutIntercept1.intercept ~== 0 absTol 1E-3)
+      assert(modelWithoutIntercept1.weights ~= weightsWithoutInterceptR relTol 1E-3)
+      assert(modelWithoutIntercept2.intercept ~== 0 absTol 1E-3)
+      assert(modelWithoutIntercept2.weights ~= weightsWithoutInterceptR relTol 1E-3)
+    }
   }
 
   test("linear regression with intercept with L1 regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
-    val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
-      .setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         6.24300
-       as.numeric.data.V2. 4.024821
-       as.numeric.data.V3. 6.679841
-     */
-    val interceptR1 = 6.24300
-    val weightsR1 = Vectors.dense(4.024821, 6.679841)
-
-    assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-      weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-        standardize=FALSE))
-      > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-                                s0
-      (Intercept)         6.416948
-      as.numeric.data.V2. 3.893869
-      as.numeric.data.V3. 6.724286
-     */
-    val interceptR2 = 6.416948
-    val weightsR2 = Vectors.dense(3.893869, 6.724286)
-
-    assert(model2.intercept ~== interceptR2 relTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
+        .setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
+        .setSolver(solver).setStandardization(false)
+
+      var model1: LinearRegressionModel = null
+      var model2: LinearRegressionModel = null
+
+      // Normal optimizer is not supported with only L1 regularization case.
+      if (solver == "normal") {
+        intercept[IllegalArgumentException] {
+            trainer1.fit(dataset)
+            trainer2.fit(dataset)
+          }
+      } else {
+        model1 = trainer1.fit(dataset)
+        model2 = trainer2.fit(dataset)
+
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                    s0
+           (Intercept)         6.24300
+           as.numeric.data.V2. 4.024821
+           as.numeric.data.V3. 6.679841
+         */
+        val interceptR1 = 6.24300
+        val weightsR1 = Vectors.dense(4.024821, 6.679841)
+        assert(model1.intercept ~== interceptR1 relTol 1E-3)
+        assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
+             standardize=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                    s0
+           (Intercept)         6.416948
+           as.numeric.data.V2. 3.893869
+           as.numeric.data.V3. 6.724286
+         */
+        val interceptR2 = 6.416948
+        val weightsR2 = Vectors.dense(3.893869, 6.724286)
+
+        assert(model2.intercept ~== interceptR2 relTol 1E-3)
+        assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+        model1.transform(dataset).select("features", "prediction").collect().foreach {
+          case Row(features: DenseVector, prediction1: Double) =>
+            val prediction2 =
+              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            assert(prediction1 ~== prediction2 relTol 1E-5)
+        }
+      }
     }
   }
 
   test("linear regression without intercept with L1 regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
-      .setFitIntercept(false)
-    val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
-      .setFitIntercept(false).setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-         intercept=FALSE))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)          .
-       as.numeric.data.V2. 6.299752
-       as.numeric.data.V3. 4.772913
-     */
-    val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(6.299752, 4.772913)
-
-    assert(model1.intercept ~== interceptR1 absTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-         intercept=FALSE, standardize=FALSE))
-       > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         .
-       as.numeric.data.V2. 6.232193
-       as.numeric.data.V3. 4.764229
-     */
-    val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(6.232193, 4.764229)
-
-    assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
+        .setFitIntercept(false).setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
+        .setFitIntercept(false).setStandardization(false).setSolver(solver)
+
+      var model1: LinearRegressionModel = null
+      var model2: LinearRegressionModel = null
+
+      // Normal optimizer is not supported with only L1 regularization case.
+      if (solver == "normal") {
+        intercept[IllegalArgumentException] {
+            trainer1.fit(dataset)
+            trainer2.fit(dataset)
+          }
+      } else {
+        model1 = trainer1.fit(dataset)
+        model2 = trainer2.fit(dataset)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
+             intercept=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                     s0
+           (Intercept)          .
+           as.numeric.data.V2. 6.299752
+           as.numeric.data.V3. 4.772913
+         */
+        val interceptR1 = 0.0
+        val weightsR1 = Vectors.dense(6.299752, 4.772913)
+
+        assert(model1.intercept ~== interceptR1 absTol 1E-3)
+        assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
+             intercept=FALSE, standardize=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                     s0
+           (Intercept)         .
+           as.numeric.data.V2. 6.232193
+           as.numeric.data.V3. 4.764229
+         */
+        val interceptR2 = 0.0
+        val weightsR2 = Vectors.dense(6.232193, 4.764229)
+
+        assert(model2.intercept ~== interceptR2 absTol 1E-3)
+        assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+        model1.transform(dataset).select("features", "prediction").collect().foreach {
+          case Row(features: DenseVector, prediction1: Double) =>
+            val prediction2 =
+              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            assert(prediction1 ~== prediction2 relTol 1E-5)
+        }
+      }
     }
   }
 
   test("linear regression with intercept with L2 regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
-    val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
-      .setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-      weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3))
-      > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-                                s0
-      (Intercept)         5.269376
-      as.numeric.data.V2. 3.736216
-      as.numeric.data.V3. 5.712356)
-     */
-    val interceptR1 = 5.269376
-    val weightsR1 = Vectors.dense(3.736216, 5.712356)
-
-    assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-      weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
-        standardize=FALSE))
-      > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-                                s0
-      (Intercept)         5.791109
-      as.numeric.data.V2. 3.435466
-      as.numeric.data.V3. 5.910406
-     */
-    val interceptR2 = 5.791109
-    val weightsR2 = Vectors.dense(3.435466, 5.910406)
-
-    assert(model2.intercept ~== interceptR2 relTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
+        .setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
+        .setStandardization(false).setSolver(solver)
+      val model1 = trainer1.fit(dataset)
+      val model2 = trainer2.fit(dataset)
+
+      /*
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         5.269376
+         as.numeric.data.V2. 3.736216
+         as.numeric.data.V3. 5.712356)
+       */
+      val interceptR1 = 5.269376
+      val weightsR1 = Vectors.dense(3.736216, 5.712356)
+
+      assert(model1.intercept ~== interceptR1 relTol 1E-3)
+      assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+      /*
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+           standardize=FALSE))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         5.791109
+         as.numeric.data.V2. 3.435466
+         as.numeric.data.V3. 5.910406
+       */
+      val interceptR2 = 5.791109
+      val weightsR2 = Vectors.dense(3.435466, 5.910406)
+
+      assert(model2.intercept ~== interceptR2 relTol 1E-3)
+      assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+      model1.transform(dataset).select("features", "prediction").collect().foreach {
+        case Row(features: DenseVector, prediction1: Double) =>
+          val prediction2 =
+            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+          assert(prediction1 ~== prediction2 relTol 1E-5)
+      }
     }
   }
 
   test("linear regression without intercept with L2 regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
-      .setFitIntercept(false)
-    val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
-      .setFitIntercept(false).setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
-         intercept = FALSE))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         .
-       as.numeric.data.V2. 5.522875
-       as.numeric.data.V3. 4.214502
-     */
-    val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(5.522875, 4.214502)
-
-    assert(model1.intercept ~== interceptR1 absTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
-         intercept = FALSE, standardize=FALSE))
-       > weights
-        3 x 1 sparse Matrix of class "dgCMatrix"
-                                 s0
-       (Intercept)         .
-       as.numeric.data.V2. 5.263704
-       as.numeric.data.V3. 4.187419
-     */
-    val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(5.263704, 4.187419)
-
-    assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
+        .setFitIntercept(false).setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
+        .setFitIntercept(false).setStandardization(false).setSolver(solver)
+      val model1 = trainer1.fit(dataset)
+      val model2 = trainer2.fit(dataset)
+
+      /*
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+           intercept = FALSE))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         .
+         as.numeric.data.V2. 5.522875
+         as.numeric.data.V3. 4.214502
+       */
+      val interceptR1 = 0.0
+      val weightsR1 = Vectors.dense(5.522875, 4.214502)
+
+      assert(model1.intercept ~== interceptR1 absTol 1E-3)
+      assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+      /*
+         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+           intercept = FALSE, standardize=FALSE))
+         > weights
+          3 x 1 sparse Matrix of class "dgCMatrix"
+                                   s0
+         (Intercept)         .
+         as.numeric.data.V2. 5.263704
+         as.numeric.data.V3. 4.187419
+       */
+      val interceptR2 = 0.0
+      val weightsR2 = Vectors.dense(5.263704, 4.187419)
+
+      assert(model2.intercept ~== interceptR2 absTol 1E-3)
+      assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+      model1.transform(dataset).select("features", "prediction").collect().foreach {
+        case Row(features: DenseVector, prediction1: Double) =>
+          val prediction2 =
+            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+          assert(prediction1 ~== prediction2 relTol 1E-5)
+      }
     }
   }
 
   test("linear regression with intercept with ElasticNet regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
-    val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
-      .setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6))
-       > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-       s0
-       (Intercept)         6.324108
-       as.numeric.data.V2. 3.168435
-       as.numeric.data.V3. 5.200403
-     */
-    val interceptR1 = 5.696056
-    val weightsR1 = Vectors.dense(3.670489, 6.001122)
-
-    assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-      weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6
-       standardize=FALSE))
-      > weights
-      3 x 1 sparse Matrix of class "dgCMatrix"
-      s0
-      (Intercept)         6.114723
-      as.numeric.data.V2. 3.409937
-      as.numeric.data.V3. 6.146531
-     */
-    val interceptR2 = 6.114723
-    val weightsR2 = Vectors.dense(3.409937, 6.146531)
-
-    assert(model2.intercept ~== interceptR2 relTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
+        .setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
+        .setStandardization(false).setSolver(solver)
+
+      var model1: LinearRegressionModel = null
+      var model2: LinearRegressionModel = null
+
+      // Normal optimizer is not supported with non-zero elasticnet parameter.
+      if (solver == "normal") {
+        intercept[IllegalArgumentException] {
+            trainer1.fit(dataset)
+            trainer2.fit(dataset)
+          }
+      } else {
+        model1 = trainer1.fit(dataset)
+        model2 = trainer2.fit(dataset)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                     s0
+           (Intercept)         6.324108
+           as.numeric.data.V2. 3.168435
+           as.numeric.data.V3. 5.200403
+         */
+        val interceptR1 = 5.696056
+        val weightsR1 = Vectors.dense(3.670489, 6.001122)
+
+        assert(model1.intercept ~== interceptR1 relTol 1E-3)
+        assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6
+             standardize=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                     s0
+           (Intercept)         6.114723
+           as.numeric.data.V2. 3.409937
+           as.numeric.data.V3. 6.146531
+         */
+        val interceptR2 = 6.114723
+        val weightsR2 = Vectors.dense(3.409937, 6.146531)
+
+        assert(model2.intercept ~== interceptR2 relTol 1E-3)
+        assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+        model1.transform(dataset).select("features", "prediction").collect().foreach {
+          case Row(features: DenseVector, prediction1: Double) =>
+            val prediction2 =
+              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            assert(prediction1 ~== prediction2 relTol 1E-5)
+        }
+      }
     }
   }
 
   test("linear regression without intercept with ElasticNet regularization") {
-    val trainer1 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
-      .setFitIntercept(false)
-    val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
-      .setFitIntercept(false).setStandardization(false)
-    val model1 = trainer1.fit(dataset)
-    val model2 = trainer2.fit(dataset)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
-         intercept=FALSE))
-       > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-       s0
-       (Intercept)         .
-       as.numeric.dataM.V2. 5.673348
-       as.numeric.dataM.V3. 4.322251
-     */
-    val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(5.673348, 4.322251)
-
-    assert(model1.intercept ~== interceptR1 absTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
-
-    /*
-       weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
-         intercept=FALSE, standardize=FALSE))
-       > weights
-       3 x 1 sparse Matrix of class "dgCMatrix"
-       s0
-       (Intercept)         .
-       as.numeric.data.V2. 5.477988
-       as.numeric.data.V3. 4.297622
-     */
-    val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(5.477988, 4.297622)
-
-    assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
-
-    model1.transform(dataset).select("features", "prediction").collect().foreach {
-      case Row(features: DenseVector, prediction1: Double) =>
-        val prediction2 =
-          features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-        assert(prediction1 ~== prediction2 relTol 1E-5)
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer1 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
+        .setFitIntercept(false).setSolver(solver)
+      val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
+        .setFitIntercept(false).setStandardization(false).setSolver(solver)
+
+      var model1: LinearRegressionModel = null
+      var model2: LinearRegressionModel = null
+
+      // Normal optimizer is not supported with non-zero elasticnet parameter.
+      if (solver == "normal") {
+        intercept[IllegalArgumentException] {
+            trainer1.fit(dataset)
+            trainer2.fit(dataset)
+          }
+      } else {
+        model1 = trainer1.fit(dataset)
+        model2 = trainer2.fit(dataset)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
+             intercept=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                      s0
+           (Intercept)         .
+           as.numeric.dataM.V2. 5.673348
+           as.numeric.dataM.V3. 4.322251
+         */
+        val interceptR1 = 0.0
+        val weightsR1 = Vectors.dense(5.673348, 4.322251)
+
+        assert(model1.intercept ~== interceptR1 absTol 1E-3)
+        assert(model1.weights ~= weightsR1 relTol 1E-3)
+
+        /*
+           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
+             intercept=FALSE, standardize=FALSE))
+           > weights
+            3 x 1 sparse Matrix of class "dgCMatrix"
+                                     s0
+           (Intercept)         .
+           as.numeric.data.V2. 5.477988
+           as.numeric.data.V3. 4.297622
+         */
+        val interceptR2 = 0.0
+        val weightsR2 = Vectors.dense(5.477988, 4.297622)
+
+        assert(model2.intercept ~== interceptR2 absTol 1E-3)
+        assert(model2.weights ~= weightsR2 relTol 1E-3)
+
+        model1.transform(dataset).select("features", "prediction").collect().foreach {
+          case Row(features: DenseVector, prediction1: Double) =>
+            val prediction2 =
+              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            assert(prediction1 ~== prediction2 relTol 1E-5)
+        }
+      }
     }
   }
 
   test("linear regression model training summary") {
-    val trainer = new LinearRegression
-    val model = trainer.fit(dataset)
-    val trainerNoPredictionCol = trainer.setPredictionCol("")
-    val modelNoPredictionCol = trainerNoPredictionCol.fit(dataset)
-
-
-    // Training results for the model should be available
-    assert(model.hasSummary)
-    assert(modelNoPredictionCol.hasSummary)
-
-    // Schema should be a superset of the input dataset
-    assert((dataset.schema.fieldNames.toSet + "prediction").subsetOf(
-      model.summary.predictions.schema.fieldNames.toSet))
-    // Validate that we re-insert a prediction column for evaluation
-    val modelNoPredictionColFieldNames = modelNoPredictionCol.summary.predictions.schema.fieldNames
-    assert((dataset.schema.fieldNames.toSet).subsetOf(
-      modelNoPredictionColFieldNames.toSet))
-    assert(modelNoPredictionColFieldNames.exists(s => s.startsWith("prediction_")))
-
-    // Residuals in [[LinearRegressionResults]] should equal those manually computed
-    val expectedResiduals = dataset.select("features", "label")
-      .map { case Row(features: DenseVector, label: Double) =>
-      val prediction =
-        features(0) * model.weights(0) + features(1) * model.weights(1) + model.intercept
-      label - prediction
-    }
-      .zip(model.summary.residuals.map(_.getDouble(0)))
-      .collect()
-      .foreach { case (manualResidual: Double, resultResidual: Double) =>
-      assert(manualResidual ~== resultResidual relTol 1E-5)
-    }
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer = new LinearRegression().setSolver(solver)
+      val model = trainer.fit(dataset)
+      val trainerNoPredictionCol = trainer.setPredictionCol("")
+      val modelNoPredictionCol = trainerNoPredictionCol.fit(dataset)
+
+
+      // Training results for the model should be available
+      assert(model.hasSummary)
+      assert(modelNoPredictionCol.hasSummary)
+
+      // Schema should be a superset of the input dataset
+      assert((dataset.schema.fieldNames.toSet + "prediction").subsetOf(
+        model.summary.predictions.schema.fieldNames.toSet))
+      // Validate that we re-insert a prediction column for evaluation
+      val modelNoPredictionColFieldNames
+      = modelNoPredictionCol.summary.predictions.schema.fieldNames
+      assert((dataset.schema.fieldNames.toSet).subsetOf(
+        modelNoPredictionColFieldNames.toSet))
+      assert(modelNoPredictionColFieldNames.exists(s => s.startsWith("prediction_")))
+
+      // Residuals in [[LinearRegressionResults]] should equal those manually computed
+      val expectedResiduals = dataset.select("features", "label")
+        .map { case Row(features: DenseVector, label: Double) =>
+        val prediction =
+          features(0) * model.weights(0) + features(1) * model.weights(1) + model.intercept
+        label - prediction
+      }
+        .zip(model.summary.residuals.map(_.getDouble(0)))
+        .collect()
+        .foreach { case (manualResidual: Double, resultResidual: Double) =>
+        assert(manualResidual ~== resultResidual relTol 1E-5)
+      }
 
-    /*
-       Use the following R code to generate model training results.
-
-       predictions <- predict(fit, newx=features)
-       residuals <- label - predictions
-       > mean(residuals^2) # MSE
-       [1] 0.009720325
-       > mean(abs(residuals)) # MAD
-       [1] 0.07863206
-       > cor(predictions, label)^2# r^2
-               [,1]
-       s0 0.9998749
-     */
-    assert(model.summary.meanSquaredError ~== 0.00972035 relTol 1E-5)
-    assert(model.summary.meanAbsoluteError ~== 0.07863206  relTol 1E-5)
-    assert(model.summary.r2 ~== 0.9998749 relTol 1E-5)
-
-    // Objective function should be monotonically decreasing for linear regression
-    assert(
-      model.summary
-        .objectiveHistory
-        .sliding(2)
-        .forall(x => x(0) >= x(1)))
+      /*
+         Use the following R code to generate model training results.
+
+         predictions <- predict(fit, newx=features)
+         residuals <- label - predictions
+         > mean(residuals^2) # MSE
+         [1] 0.009720325
+         > mean(abs(residuals)) # MAD
+         [1] 0.07863206
+         > cor(predictions, label)^2# r^2
+                 [,1]
+         s0 0.9998749
+       */
+      assert(model.summary.meanSquaredError ~== 0.00972035 relTol 1E-5)
+      assert(model.summary.meanAbsoluteError ~== 0.07863206 relTol 1E-5)
+      assert(model.summary.r2 ~== 0.9998749 relTol 1E-5)
+
+      // Normal solver uses "WeightedLeastSquares". This algorithm does not generate
+      // objective history because it does not run through iterations.
+      if (solver == "l-bfgs") {
+        // Objective function should be monotonically decreasing for linear regression
+        assert(
+          model.summary
+            .objectiveHistory
+            .sliding(2)
+            .forall(x => x(0) >= x(1)))
+      }
+    }
   }
 
   test("linear regression model testset evaluation summary") {
-    val trainer = new LinearRegression
-    val model = trainer.fit(dataset)
-
-    // Evaluating on training dataset should yield results summary equal to training summary
-    val testSummary = model.evaluate(dataset)
-    assert(model.summary.meanSquaredError ~== testSummary.meanSquaredError relTol 1E-5)
-    assert(model.summary.r2 ~== testSummary.r2 relTol 1E-5)
-    model.summary.residuals.select("residuals").collect()
-      .zip(testSummary.residuals.select("residuals").collect())
-      .forall { case (Row(r1: Double), Row(r2: Double)) => r1 ~== r2 relTol 1E-5 }
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val trainer = new LinearRegression().setSolver(solver)
+      val model = trainer.fit(dataset)
+
+      // Evaluating on training dataset should yield results summary equal to training summary
+      val testSummary = model.evaluate(dataset)
+      assert(model.summary.meanSquaredError ~== testSummary.meanSquaredError relTol 1E-5)
+      assert(model.summary.r2 ~== testSummary.r2 relTol 1E-5)
+      model.summary.residuals.select("residuals").collect()
+        .zip(testSummary.residuals.select("residuals").collect())
+        .forall { case (Row(r1: Double), Row(r2: Double)) => r1 ~== r2 relTol 1E-5 }
+    }
   }
 
-  test("linear regression with weighted samples"){
-    val (data, weightedData) = {
-      val activeData = LinearDataGenerator.generateLinearInput(
-        6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
-
-      val rnd = new Random(8392)
-      val signedData = activeData.map { case p: LabeledPoint =>
-        (rnd.nextGaussian() > 0.0, p)
-      }
-
-      val data1 = signedData.flatMap {
-        case (true, p) => Iterator(p, p)
-        case (false, p) => Iterator(p)
-      }
-
-      val weightedSignedData = signedData.flatMap {
-        case (true, LabeledPoint(label, features)) =>
-          Iterator(
-            Instance(label, weight = 1.2, features),
-            Instance(label, weight = 0.8, features)
-          )
-        case (false, LabeledPoint(label, features)) =>
-          Iterator(
-            Instance(label, weight = 0.3, features),
-            Instance(label, weight = 0.1, features),
-            Instance(label, weight = 0.6, features)
-          )
+  test("linear regression with weighted samples") {
+    Seq("auto", "l-bfgs", "normal").foreach { solver =>
+      val (data, weightedData) = {
+        val activeData = LinearDataGenerator.generateLinearInput(
+          6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
+
+        val rnd = new Random(8392)
+        val signedData = activeData.map { case p: LabeledPoint =>
+          (rnd.nextGaussian() > 0.0, p)
+        }
+
+        val data1 = signedData.flatMap {
+          case (true, p) => Iterator(p, p)
+          case (false, p) => Iterator(p)
+        }
+
+        val weightedSignedData = signedData.flatMap {
+          case (true, LabeledPoint(label, features)) =>
+            Iterator(
+              Instance(label, weight = 1.2, features),
+              Instance(label, weight = 0.8, features)
+            )
+          case (false, LabeledPoint(label, features)) =>
+            Iterator(
+              Instance(label, weight = 0.3, features),
+              Instance(label, weight = 0.1, features),
+              Instance(label, weight = 0.6, features)
+            )
+        }
+
+        val noiseData = LinearDataGenerator.generateLinearInput(
+          2, Array(1, 3), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
+        val weightedNoiseData = noiseData.map {
+          case LabeledPoint(label, features) => Instance(label, weight = 0, features)
+        }
+        val data2 = weightedSignedData ++ weightedNoiseData
+
+        (sqlContext.createDataFrame(sc.parallelize(data1, 4)),
+          sqlContext.createDataFrame(sc.parallelize(data2, 4)))
       }
 
-      val noiseData = LinearDataGenerator.generateLinearInput(
-        2, Array(1, 3), Array(0.9, -1.3), Array(0.7, 1.2), 500, 1, 0.1)
-      val weightedNoiseData = noiseData.map {
-        case LabeledPoint(label, features) => Instance(label, weight = 0, features)
-      }
-      val data2 = weightedSignedData ++ weightedNoiseData
-
-      (sqlContext.createDataFrame(sc.parallelize(data1, 4)),
-        sqlContext.createDataFrame(sc.parallelize(data2, 4)))
+      val trainer1a = (new LinearRegression).setFitIntercept(true)
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(true).setSolver(solver)
+      val trainer1b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(true).setSolver(solver)
+
+      // Normal optimizer is not supported with non-zero elasticnet parameter.
+      val model1a0 = trainer1a.fit(data)
+      val model1a1 = trainer1a.fit(weightedData)
+      val model1b = trainer1b.fit(weightedData)
+
+      assert(model1a0.weights !~= model1a1.weights absTol 1E-3)
+      assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
+      assert(model1a0.weights ~== model1b.weights absTol 1E-3)
+      assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
+
+      val trainer2a = (new LinearRegression).setFitIntercept(true)
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(false).setSolver(solver)
+      val trainer2b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(false).setSolver(solver)
+      val model2a0 = trainer2a.fit(data)
+      val model2a1 = trainer2a.fit(weightedData)
+      val model2b = trainer2b.fit(weightedData)
+      assert(model2a0.weights !~= model2a1.weights absTol 1E-3)
+      assert(model2a0.intercept !~= model2a1.intercept absTol 1E-3)
+      assert(model2a0.weights ~== model2b.weights absTol 1E-3)
+      assert(model2a0.intercept ~== model2b.intercept absTol 1E-3)
+
+      val trainer3a = (new LinearRegression).setFitIntercept(false)
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(true).setSolver(solver)
+      val trainer3b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(true).setSolver(solver)
+      val model3a0 = trainer3a.fit(data)
+      val model3a1 = trainer3a.fit(weightedData)
+      val model3b = trainer3b.fit(weightedData)
+      assert(model3a0.weights !~= model3a1.weights absTol 1E-3)
+      assert(model3a0.weights ~== model3b.weights absTol 1E-3)
+
+      val trainer4a = (new LinearRegression).setFitIntercept(false)
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(false).setSolver(solver)
+      val trainer4b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
+        .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(false).setSolver(solver)
+      val model4a0 = trainer4a.fit(data)
+      val model4a1 = trainer4a.fit(weightedData)
+      val model4b = trainer4b.fit(weightedData)
+      assert(model4a0.weights !~= model4a1.weights absTol 1E-3)
+      assert(model4a0.weights ~== model4b.weights absTol 1E-3)
     }
-
-    val trainer1a = (new LinearRegression).setFitIntercept(true)
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
-    val trainer1b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
-    val model1a0 = trainer1a.fit(data)
-    val model1a1 = trainer1a.fit(weightedData)
-    val model1b = trainer1b.fit(weightedData)
-    assert(model1a0.weights !~= model1a1.weights absTol 1E-3)
-    assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
-    assert(model1a0.weights ~== model1b.weights absTol 1E-3)
-    assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
-
-    val trainer2a = (new LinearRegression).setFitIntercept(true)
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
-    val trainer2b = (new LinearRegression).setFitIntercept(true).setWeightCol("weight")
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
-    val model2a0 = trainer2a.fit(data)
-    val model2a1 = trainer2a.fit(weightedData)
-    val model2b = trainer2b.fit(weightedData)
-    assert(model2a0.weights !~= model2a1.weights absTol 1E-3)
-    assert(model2a0.intercept !~= model2a1.intercept absTol 1E-3)
-    assert(model2a0.weights ~== model2b.weights absTol 1E-3)
-    assert(model2a0.intercept ~== model2b.intercept absTol 1E-3)
-
-    val trainer3a = (new LinearRegression).setFitIntercept(false)
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
-    val trainer3b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(true)
-    val model3a0 = trainer3a.fit(data)
-    val model3a1 = trainer3a.fit(weightedData)
-    val model3b = trainer3b.fit(weightedData)
-    assert(model3a0.weights !~= model3a1.weights absTol 1E-3)
-    assert(model3a0.weights ~== model3b.weights absTol 1E-3)
-
-    val trainer4a = (new LinearRegression).setFitIntercept(false)
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
-    val trainer4b = (new LinearRegression).setFitIntercept(false).setWeightCol("weight")
-      .setElasticNetParam(0.38).setRegParam(0.21).setStandardization(false)
-    val model4a0 = trainer4a.fit(data)
-    val model4a1 = trainer4a.fit(weightedData)
-    val model4b = trainer4b.fit(weightedData)
-    assert(model4a0.weights !~= model4a1.weights absTol 1E-3)
-    assert(model4a0.weights ~== model4b.weights absTol 1E-3)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
index fde02e0c84bc..cbe09292a033 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
@@ -69,7 +69,7 @@ class CrossValidatorSuite extends SparkFunSuite with MLlibTestSparkContext {
       sc.parallelize(LinearDataGenerator.generateLinearInput(
         6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 100, 42, 0.1), 2))
 
-    val trainer = new LinearRegression
+    val trainer = new LinearRegression().setSolver("l-bfgs")
     val lrParamMaps = new ParamGridBuilder()
       .addGrid(trainer.regParam, Array(1000.0, 0.001))
       .addGrid(trainer.maxIter, Array(0, 10))
diff --git a/mllib/src/test/scala/org/apache/spark/ml/tuning/TrainValidationSplitSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/tuning/TrainValidationSplitSuite.scala
index ef24e6fb6b80..5fb80091d0b4 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/tuning/TrainValidationSplitSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/tuning/TrainValidationSplitSuite.scala
@@ -58,7 +58,7 @@ class TrainValidationSplitSuite extends SparkFunSuite with MLlibTestSparkContext
         sc.parallelize(LinearDataGenerator.generateLinearInput(
             6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 100, 42, 0.1), 2))
 
-    val trainer = new LinearRegression
+    val trainer = new LinearRegression().setSolver("l-bfgs")
     val lrParamMaps = new ParamGridBuilder()
       .addGrid(trainer.regParam, Array(1000.0, 0.001))
       .addGrid(trainer.maxIter, Array(0, 10))

From 7893cd95db5f2caba59ff5c859d7e4964ad7938d Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 19 Oct 2015 11:02:26 -0700
Subject: [PATCH 285/896] [SPARK-11119] [SQL] cleanup for unsafe array and map

The purpose of this PR is to keep the unsafe format detail only inside the unsafe class itself, so when we use them(like use unsafe array in unsafe map, use unsafe array and map in columnar cache), we don't need to understand the format before use them.

change list:
* unsafe array's 4-bytes numElements header is now required(was optional), and become a part of unsafe array format.
* w.r.t the previous changing, the `sizeInBytes` of unsafe array now counts the 4-bytes header.
* unsafe map's format was `[numElements] [key array numBytes] [key array content(without numElements header)] [value array content(without numElements header)]` before, which is a little hacky as it makes unsafe array's header optional. I think saving 4 bytes is not a big deal, so the format is now: `[key array numBytes] [unsafe key array] [unsafe value array]`.
* w.r.t the previous changing, the `sizeInBytes` of unsafe map now counts both map's header and array's header.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9131 from cloud-fan/unsafe.
---
 .../catalyst/expressions/UnsafeArrayData.java | 43 +++++----
 .../catalyst/expressions/UnsafeMapData.java   | 88 +++++++++++++++----
 .../catalyst/expressions/UnsafeReaders.java   | 54 ------------
 .../sql/catalyst/expressions/UnsafeRow.java   |  8 +-
 .../codegen/UnsafeArrayWriter.java            | 24 ++---
 .../expressions/codegen/UnsafeRowWriter.java  | 15 ----
 .../codegen/GenerateUnsafeProjection.scala    | 60 +++++++------
 .../expressions/UnsafeRowConverterSuite.scala | 42 ++++-----
 .../spark/sql/columnar/ColumnType.scala       | 30 ++++---
 .../spark/sql/columnar/ColumnTypeSuite.scala  |  2 +-
 10 files changed, 174 insertions(+), 192 deletions(-)
 delete mode 100644 sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index 4c63abb071e3..761f0447943e 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -30,19 +30,18 @@
 /**
  * An Unsafe implementation of Array which is backed by raw memory instead of Java objects.
  *
- * Each tuple has two parts: [offsets] [values]
+ * Each tuple has three parts: [numElements] [offsets] [values]
  *
- * In the `offsets` region, we store 4 bytes per element, represents the start address of this
- * element in `values` region. We can get the length of this element by subtracting next offset.
+ * The `numElements` is 4 bytes storing the number of elements of this array.
+ *
+ * In the `offsets` region, we store 4 bytes per element, represents the relative offset (w.r.t. the
+ * base address of the array) of this element in `values` region. We can get the length of this
+ * element by subtracting next offset.
  * Note that offset can by negative which means this element is null.
  *
  * In the `values` region, we store the content of elements. As we can get length info, so elements
  * can be variable-length.
  *
- * Note that when we write out this array, we should write out the `numElements` at first 4 bytes,
- * then follows content. When we read in an array, we should read first 4 bytes as `numElements`
- * and take the rest as content.
- *
  * Instances of `UnsafeArrayData` act as pointers to row data stored in this format.
  */
 // todo: there is a lof of duplicated code between UnsafeRow and UnsafeArrayData.
@@ -54,11 +53,16 @@ public class UnsafeArrayData extends ArrayData {
   // The number of elements in this array
   private int numElements;
 
-  // The size of this array's backing data, in bytes
+  // The size of this array's backing data, in bytes.
+  // The 4-bytes header of `numElements` is also included.
   private int sizeInBytes;
 
+  public Object getBaseObject() { return baseObject; }
+  public long getBaseOffset() { return baseOffset; }
+  public int getSizeInBytes() { return sizeInBytes; }
+
   private int getElementOffset(int ordinal) {
-    return Platform.getInt(baseObject, baseOffset + ordinal * 4L);
+    return Platform.getInt(baseObject, baseOffset + 4 + ordinal * 4L);
   }
 
   private int getElementSize(int offset, int ordinal) {
@@ -85,10 +89,6 @@ public Object[] array() {
    */
   public UnsafeArrayData() { }
 
-  public Object getBaseObject() { return baseObject; }
-  public long getBaseOffset() { return baseOffset; }
-  public int getSizeInBytes() { return sizeInBytes; }
-
   @Override
   public int numElements() { return numElements; }
 
@@ -97,10 +97,13 @@ public UnsafeArrayData() { }
    *
    * @param baseObject the base object
    * @param baseOffset the offset within the base object
-   * @param sizeInBytes the size of this row's backing data, in bytes
+   * @param sizeInBytes the size of this array's backing data, in bytes
    */
-  public void pointTo(Object baseObject, long baseOffset, int numElements, int sizeInBytes) {
+  public void pointTo(Object baseObject, long baseOffset, int sizeInBytes) {
+    // Read the number of elements from the first 4 bytes.
+    final int numElements = Platform.getInt(baseObject, baseOffset);
     assert numElements >= 0 : "numElements (" + numElements + ") should >= 0";
+
     this.numElements = numElements;
     this.baseObject = baseObject;
     this.baseOffset = baseOffset;
@@ -277,7 +280,9 @@ public UnsafeArrayData getArray(int ordinal) {
     final int offset = getElementOffset(ordinal);
     if (offset < 0) return null;
     final int size = getElementSize(offset, ordinal);
-    return UnsafeReaders.readArray(baseObject, baseOffset + offset, size);
+    final UnsafeArrayData array = new UnsafeArrayData();
+    array.pointTo(baseObject, baseOffset + offset, size);
+    return array;
   }
 
   @Override
@@ -286,7 +291,9 @@ public UnsafeMapData getMap(int ordinal) {
     final int offset = getElementOffset(ordinal);
     if (offset < 0) return null;
     final int size = getElementSize(offset, ordinal);
-    return UnsafeReaders.readMap(baseObject, baseOffset + offset, size);
+    final UnsafeMapData map = new UnsafeMapData();
+    map.pointTo(baseObject, baseOffset + offset, size);
+    return map;
   }
 
   @Override
@@ -328,7 +335,7 @@ public UnsafeArrayData copy() {
     final byte[] arrayDataCopy = new byte[sizeInBytes];
     Platform.copyMemory(
       baseObject, baseOffset, arrayDataCopy, Platform.BYTE_ARRAY_OFFSET, sizeInBytes);
-    arrayCopy.pointTo(arrayDataCopy, Platform.BYTE_ARRAY_OFFSET, numElements, sizeInBytes);
+    arrayCopy.pointTo(arrayDataCopy, Platform.BYTE_ARRAY_OFFSET, sizeInBytes);
     return arrayCopy;
   }
 }
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
index e9dab9edb6bd..5bebe2a96e39 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
@@ -17,41 +17,73 @@
 
 package org.apache.spark.sql.catalyst.expressions;
 
+import java.nio.ByteBuffer;
+
 import org.apache.spark.sql.types.MapData;
+import org.apache.spark.unsafe.Platform;
 
 /**
  * An Unsafe implementation of Map which is backed by raw memory instead of Java objects.
  *
- * Currently we just use 2 UnsafeArrayData to represent UnsafeMapData.
- *
- * Note that when we write out this map, we should write out the `numElements` at first 4 bytes,
- * and numBytes of key array at second 4 bytes, then follows key array content and value array
- * content without `numElements` header.
- * When we read in a map, we should read first 4 bytes as `numElements` and second 4 bytes as
- * numBytes of key array, and construct unsafe key array and value array with these 2 information.
+ * Currently we just use 2 UnsafeArrayData to represent UnsafeMapData, with extra 4 bytes at head
+ * to indicate the number of bytes of the unsafe key array.
+ * [unsafe key array numBytes] [unsafe key array] [unsafe value array]
  */
+// TODO: Use a more efficient format which doesn't depend on unsafe array.
 public class UnsafeMapData extends MapData {
 
-  private final UnsafeArrayData keys;
-  private final UnsafeArrayData values;
-  // The number of elements in this array
-  private int numElements;
-  // The size of this array's backing data, in bytes
+  private Object baseObject;
+  private long baseOffset;
+
+  // The size of this map's backing data, in bytes.
+  // The 4-bytes header of key array `numBytes` is also included, so it's actually equal to
+  // 4 + key array numBytes + value array numBytes.
   private int sizeInBytes;
 
+  public Object getBaseObject() { return baseObject; }
+  public long getBaseOffset() { return baseOffset; }
   public int getSizeInBytes() { return sizeInBytes; }
 
-  public UnsafeMapData(UnsafeArrayData keys, UnsafeArrayData values) {
+  private final UnsafeArrayData keys;
+  private final UnsafeArrayData values;
+
+  /**
+   * Construct a new UnsafeMapData. The resulting UnsafeMapData won't be usable until
+   * `pointTo()` has been called, since the value returned by this constructor is equivalent
+   * to a null pointer.
+   */
+  public UnsafeMapData() {
+    keys = new UnsafeArrayData();
+    values = new UnsafeArrayData();
+  }
+
+  /**
+   * Update this UnsafeMapData to point to different backing data.
+   *
+   * @param baseObject the base object
+   * @param baseOffset the offset within the base object
+   * @param sizeInBytes the size of this map's backing data, in bytes
+   */
+  public void pointTo(Object baseObject, long baseOffset, int sizeInBytes) {
+    // Read the numBytes of key array from the first 4 bytes.
+    final int keyArraySize = Platform.getInt(baseObject, baseOffset);
+    final int valueArraySize = sizeInBytes - keyArraySize - 4;
+    assert keyArraySize >= 0 : "keyArraySize (" + keyArraySize + ") should >= 0";
+    assert valueArraySize >= 0 : "valueArraySize (" + valueArraySize + ") should >= 0";
+
+    keys.pointTo(baseObject, baseOffset + 4, keyArraySize);
+    values.pointTo(baseObject, baseOffset + 4 + keyArraySize, valueArraySize);
+
     assert keys.numElements() == values.numElements();
-    this.sizeInBytes = keys.getSizeInBytes() + values.getSizeInBytes();
-    this.numElements = keys.numElements();
-    this.keys = keys;
-    this.values = values;
+
+    this.baseObject = baseObject;
+    this.baseOffset = baseOffset;
+    this.sizeInBytes = sizeInBytes;
   }
 
   @Override
   public int numElements() {
-    return numElements;
+    return keys.numElements();
   }
 
   @Override
@@ -64,8 +96,26 @@ public UnsafeArrayData valueArray() {
     return values;
   }
 
+  public void writeToMemory(Object target, long targetOffset) {
+    Platform.copyMemory(baseObject, baseOffset, target, targetOffset, sizeInBytes);
+  }
+
+  public void writeTo(ByteBuffer buffer) {
+    assert(buffer.hasArray());
+    byte[] target = buffer.array();
+    int offset = buffer.arrayOffset();
+    int pos = buffer.position();
+    writeToMemory(target, Platform.BYTE_ARRAY_OFFSET + offset + pos);
+    buffer.position(pos + sizeInBytes);
+  }
+
   @Override
   public UnsafeMapData copy() {
-    return new UnsafeMapData(keys.copy(), values.copy());
+    UnsafeMapData mapCopy = new UnsafeMapData();
+    final byte[] mapDataCopy = new byte[sizeInBytes];
+    Platform.copyMemory(
+      baseObject, baseOffset, mapDataCopy, Platform.BYTE_ARRAY_OFFSET, sizeInBytes);
+    mapCopy.pointTo(mapDataCopy, Platform.BYTE_ARRAY_OFFSET, sizeInBytes);
+    return mapCopy;
   }
 }
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java
deleted file mode 100644
index 6c5fcbca63fd..000000000000
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeReaders.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.expressions;
-
-import org.apache.spark.unsafe.Platform;
-
-public class UnsafeReaders {
-
-  /**
-   * Reads in unsafe array according to the format described in `UnsafeArrayData`.
-   */
-  public static UnsafeArrayData readArray(Object baseObject, long baseOffset, int numBytes) {
-    // Read the number of elements from first 4 bytes.
-    final int numElements = Platform.getInt(baseObject, baseOffset);
-    final UnsafeArrayData array = new UnsafeArrayData();
-    // Skip the first 4 bytes.
-    array.pointTo(baseObject, baseOffset + 4, numElements, numBytes - 4);
-    return array;
-  }
-
-  /**
-   * Reads in unsafe map according to the format described in `UnsafeMapData`.
-   */
-  public static UnsafeMapData readMap(Object baseObject, long baseOffset, int numBytes) {
-    // Read the number of elements from first 4 bytes.
-    final int numElements = Platform.getInt(baseObject, baseOffset);
-    // Read the numBytes of key array in second 4 bytes.
-    final int keyArraySize = Platform.getInt(baseObject, baseOffset + 4);
-    final int valueArraySize = numBytes - 8 - keyArraySize;
-
-    final UnsafeArrayData keyArray = new UnsafeArrayData();
-    keyArray.pointTo(baseObject, baseOffset + 8, numElements, keyArraySize);
-
-    final UnsafeArrayData valueArray = new UnsafeArrayData();
-    valueArray.pointTo(baseObject, baseOffset + 8 + keyArraySize, numElements, valueArraySize);
-
-    return new UnsafeMapData(keyArray, valueArray);
-  }
-}
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 36859fbab974..366615f6fe69 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -461,7 +461,9 @@ public UnsafeArrayData getArray(int ordinal) {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
       final int size = (int) (offsetAndSize & ((1L << 32) - 1));
-      return UnsafeReaders.readArray(baseObject, baseOffset + offset, size);
+      final UnsafeArrayData array = new UnsafeArrayData();
+      array.pointTo(baseObject, baseOffset + offset, size);
+      return array;
     }
   }
 
@@ -473,7 +475,9 @@ public UnsafeMapData getMap(int ordinal) {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
       final int size = (int) (offsetAndSize & ((1L << 32) - 1));
-      return UnsafeReaders.readMap(baseObject, baseOffset + offset, size);
+      final UnsafeMapData map = new UnsafeMapData();
+      map.pointTo(baseObject, baseOffset + offset, size);
+      return map;
     }
   }
 
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
index 138178ce99d8..7f2a1cb07af0 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
@@ -30,17 +30,19 @@
 public class UnsafeArrayWriter {
 
   private BufferHolder holder;
+
   // The offset of the global buffer where we start to write this array.
   private int startingOffset;
 
   public void initialize(BufferHolder holder, int numElements, int fixedElementSize) {
-    // We need 4 bytes each element to store offset.
-    final int fixedSize = 4 * numElements;
+    // We need 4 bytes to store numElements and 4 bytes each element to store offset.
+    final int fixedSize = 4 + 4 * numElements;
 
     this.holder = holder;
     this.startingOffset = holder.cursor;
 
     holder.grow(fixedSize);
+    Platform.putInt(holder.buffer, holder.cursor, numElements);
     holder.cursor += fixedSize;
 
     // Grows the global buffer ahead for fixed size data.
@@ -48,7 +50,7 @@ public void initialize(BufferHolder holder, int numElements, int fixedElementSiz
   }
 
   private long getElementOffset(int ordinal) {
-    return startingOffset + 4 * ordinal;
+    return startingOffset + 4 + 4 * ordinal;
   }
 
   public void setNullAt(int ordinal) {
@@ -132,20 +134,4 @@ public void write(int ordinal, CalendarInterval input) {
     // move the cursor forward.
     holder.cursor += 16;
   }
-
-
-
-  // If this array is already an UnsafeArray, we don't need to go through all elements, we can
-  // directly write it.
-  public static void directWrite(BufferHolder holder, UnsafeArrayData input) {
-    final int numBytes = input.getSizeInBytes();
-
-    // grow the global buffer before writing data.
-    holder.grow(numBytes);
-
-    // Writes the array content to the variable length portion.
-    input.writeToMemory(holder.buffer, holder.cursor);
-
-    holder.cursor += numBytes;
-  }
 }
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
index 8b7debd44003..e1f5a05d1d44 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
@@ -181,19 +181,4 @@ public void write(int ordinal, CalendarInterval input) {
     // move the cursor forward.
     holder.cursor += 16;
   }
-
-
-
-  // If this struct is already an UnsafeRow, we don't need to go through all fields, we can
-  // directly write it.
-  public static void directWrite(BufferHolder holder, UnsafeRow input) {
-    // No need to zero-out the bytes as UnsafeRow is word aligned for sure.
-    final int numBytes = input.getSizeInBytes();
-    // grow the global buffer before writing data.
-    holder.grow(numBytes);
-    // Write the bytes to the variable length portion.
-    input.writeToMemory(holder.buffer, holder.cursor);
-    // move the cursor forward.
-    holder.cursor += numBytes;
-  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 1b957a508d10..dbe92d6a8350 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -62,7 +62,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
 
     s"""
       if ($input instanceof UnsafeRow) {
-        $rowWriterClass.directWrite($bufferHolder, (UnsafeRow) $input);
+        ${writeUnsafeData(ctx, s"((UnsafeRow) $input)", bufferHolder)}
       } else {
         ${writeExpressionsToBuffer(ctx, input, fieldEvals, fieldTypes, bufferHolder)}
       }
@@ -164,8 +164,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
       ctx: CodeGenContext,
       input: String,
       elementType: DataType,
-      bufferHolder: String,
-      needHeader: Boolean = true): String = {
+      bufferHolder: String): String = {
     val arrayWriter = ctx.freshName("arrayWriter")
     ctx.addMutableState(arrayWriterClass, arrayWriter,
       s"this.$arrayWriter = new $arrayWriterClass();")
@@ -227,21 +226,11 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
       case _ => s"$arrayWriter.write($index, $element);"
     }
 
-    val writeHeader = if (needHeader) {
-      // If header is required, we need to write the number of elements into first 4 bytes.
-      s"""
-        $bufferHolder.grow(4);
-        Platform.putInt($bufferHolder.buffer, $bufferHolder.cursor, $numElements);
-        $bufferHolder.cursor += 4;
-      """
-    } else ""
-
     s"""
-      final int $numElements = $input.numElements();
-      $writeHeader
       if ($input instanceof UnsafeArrayData) {
-        $arrayWriterClass.directWrite($bufferHolder, (UnsafeArrayData) $input);
+        ${writeUnsafeData(ctx, s"((UnsafeArrayData) $input)", bufferHolder)}
       } else {
+        final int $numElements = $input.numElements();
         $arrayWriter.initialize($bufferHolder, $numElements, $fixedElementSize);
 
         for (int $index = 0; $index < $numElements; $index++) {
@@ -270,23 +259,40 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
 
     // Writes out unsafe map according to the format described in `UnsafeMapData`.
     s"""
-      final ArrayData $keys = $input.keyArray();
-      final ArrayData $values = $input.valueArray();
+      if ($input instanceof UnsafeMapData) {
+        ${writeUnsafeData(ctx, s"((UnsafeMapData) $input)", bufferHolder)}
+      } else {
+        final ArrayData $keys = $input.keyArray();
+        final ArrayData $values = $input.valueArray();
 
-      $bufferHolder.grow(8);
+        // preserve 4 bytes to write the key array numBytes later.
+        $bufferHolder.grow(4);
+        $bufferHolder.cursor += 4;
 
-      // Write the numElements into first 4 bytes.
-      Platform.putInt($bufferHolder.buffer, $bufferHolder.cursor, $keys.numElements());
+        // Remember the current cursor so that we can write numBytes of key array later.
+        final int $tmpCursor = $bufferHolder.cursor;
 
-      $bufferHolder.cursor += 8;
-      // Remember the current cursor so that we can write numBytes of key array later.
-      final int $tmpCursor = $bufferHolder.cursor;
+        ${writeArrayToBuffer(ctx, keys, keyType, bufferHolder)}
+        // Write the numBytes of key array into the first 4 bytes.
+        Platform.putInt($bufferHolder.buffer, $tmpCursor - 4, $bufferHolder.cursor - $tmpCursor);
 
-      ${writeArrayToBuffer(ctx, keys, keyType, bufferHolder, needHeader = false)}
-      // Write the numBytes of key array into second 4 bytes.
-      Platform.putInt($bufferHolder.buffer, $tmpCursor - 4, $bufferHolder.cursor - $tmpCursor);
+        ${writeArrayToBuffer(ctx, values, valueType, bufferHolder)}
+      }
+    """
+  }
 
-      ${writeArrayToBuffer(ctx, values, valueType, bufferHolder, needHeader = false)}
+  /**
+   * If the input is already in unsafe format, we don't need to go through all elements/fields,
+   * we can directly write it.
+   */
+  private def writeUnsafeData(ctx: CodeGenContext, input: String, bufferHolder: String) = {
+    val sizeInBytes = ctx.freshName("sizeInBytes")
+    s"""
+      final int $sizeInBytes = $input.getSizeInBytes();
+      // grow the global buffer before writing data.
+      $bufferHolder.grow($sizeInBytes);
+      $input.writeToMemory($bufferHolder.buffer, $bufferHolder.cursor);
+      $bufferHolder.cursor += $sizeInBytes;
     """
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
index c991cd86d28c..c6aad34e972b 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
@@ -296,13 +296,9 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     new ArrayBasedMapData(createArray(keys: _*), createArray(values: _*))
   }
 
-  private def arraySizeInRow(numBytes: Int): Int = roundedSize(4 + numBytes)
-
-  private def mapSizeInRow(numBytes: Int): Int = roundedSize(8 + numBytes)
-
   private def testArrayInt(array: UnsafeArrayData, values: Seq[Int]): Unit = {
     assert(array.numElements == values.length)
-    assert(array.getSizeInBytes == (4 + 4) * values.length)
+    assert(array.getSizeInBytes == 4 + (4 + 4) * values.length)
     values.zipWithIndex.foreach {
       case (value, index) => assert(array.getInt(index) == value)
     }
@@ -315,7 +311,7 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     testArrayInt(map.keyArray, keys)
     testArrayInt(map.valueArray, values)
 
-    assert(map.getSizeInBytes == map.keyArray.getSizeInBytes + map.valueArray.getSizeInBytes)
+    assert(map.getSizeInBytes == 4 + map.keyArray.getSizeInBytes + map.valueArray.getSizeInBytes)
   }
 
   test("basic conversion with array type") {
@@ -341,10 +337,10 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     val nestedArray = unsafeArray2.getArray(0)
     testArrayInt(nestedArray, Seq(3, 4))
 
-    assert(unsafeArray2.getSizeInBytes == 4 + (4 + nestedArray.getSizeInBytes))
+    assert(unsafeArray2.getSizeInBytes == 4 + 4 + nestedArray.getSizeInBytes)
 
-    val array1Size = arraySizeInRow(unsafeArray1.getSizeInBytes)
-    val array2Size = arraySizeInRow(unsafeArray2.getSizeInBytes)
+    val array1Size = roundedSize(unsafeArray1.getSizeInBytes)
+    val array2Size = roundedSize(unsafeArray2.getSizeInBytes)
     assert(unsafeRow.getSizeInBytes == 8 + 8 * 2 + array1Size + array2Size)
   }
 
@@ -384,13 +380,13 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       val nestedMap = valueArray.getMap(0)
       testMapInt(nestedMap, Seq(5, 6), Seq(7, 8))
 
-      assert(valueArray.getSizeInBytes == 4 + (8 + nestedMap.getSizeInBytes))
+      assert(valueArray.getSizeInBytes == 4 + 4 + nestedMap.getSizeInBytes)
     }
 
-    assert(unsafeMap2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+    assert(unsafeMap2.getSizeInBytes == 4 + keyArray.getSizeInBytes + valueArray.getSizeInBytes)
 
-    val map1Size = mapSizeInRow(unsafeMap1.getSizeInBytes)
-    val map2Size = mapSizeInRow(unsafeMap2.getSizeInBytes)
+    val map1Size = roundedSize(unsafeMap1.getSizeInBytes)
+    val map2Size = roundedSize(unsafeMap2.getSizeInBytes)
     assert(unsafeRow.getSizeInBytes == 8 + 8 * 2 + map1Size + map2Size)
   }
 
@@ -414,7 +410,7 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     val innerArray = field1.getArray(0)
     testArrayInt(innerArray, Seq(1))
 
-    assert(field1.getSizeInBytes == 8 + 8 + arraySizeInRow(innerArray.getSizeInBytes))
+    assert(field1.getSizeInBytes == 8 + 8 + roundedSize(innerArray.getSizeInBytes))
 
     val field2 = unsafeRow.getArray(1)
     assert(field2.numElements == 1)
@@ -427,10 +423,10 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       assert(innerStruct.getLong(0) == 2L)
     }
 
-    assert(field2.getSizeInBytes == 4 + innerStruct.getSizeInBytes)
+    assert(field2.getSizeInBytes == 4 + 4 + innerStruct.getSizeInBytes)
 
     assert(unsafeRow.getSizeInBytes ==
-      8 + 8 * 2 + field1.getSizeInBytes + arraySizeInRow(field2.getSizeInBytes))
+      8 + 8 * 2 + field1.getSizeInBytes + roundedSize(field2.getSizeInBytes))
   }
 
   test("basic conversion with struct and map") {
@@ -453,7 +449,7 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     val innerMap = field1.getMap(0)
     testMapInt(innerMap, Seq(1), Seq(2))
 
-    assert(field1.getSizeInBytes == 8 + 8 + mapSizeInRow(innerMap.getSizeInBytes))
+    assert(field1.getSizeInBytes == 8 + 8 + roundedSize(innerMap.getSizeInBytes))
 
     val field2 = unsafeRow.getMap(1)
 
@@ -470,13 +466,13 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       assert(innerStruct.getSizeInBytes == 8 + 8)
       assert(innerStruct.getLong(0) == 4L)
 
-      assert(valueArray.getSizeInBytes == 4 + innerStruct.getSizeInBytes)
+      assert(valueArray.getSizeInBytes == 4 + 4 + innerStruct.getSizeInBytes)
     }
 
-    assert(field2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+    assert(field2.getSizeInBytes == 4 + keyArray.getSizeInBytes + valueArray.getSizeInBytes)
 
     assert(unsafeRow.getSizeInBytes ==
-      8 + 8 * 2 + field1.getSizeInBytes + mapSizeInRow(field2.getSizeInBytes))
+      8 + 8 * 2 + field1.getSizeInBytes + roundedSize(field2.getSizeInBytes))
   }
 
   test("basic conversion with array and map") {
@@ -499,7 +495,7 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
     val innerMap = field1.getMap(0)
     testMapInt(innerMap, Seq(1), Seq(2))
 
-    assert(field1.getSizeInBytes == 4 + (8 + innerMap.getSizeInBytes))
+    assert(field1.getSizeInBytes == 4 + 4 + innerMap.getSizeInBytes)
 
     val field2 = unsafeRow.getMap(1)
     assert(field2.numElements == 1)
@@ -518,9 +514,9 @@ class UnsafeRowConverterSuite extends SparkFunSuite with Matchers {
       assert(valueArray.getSizeInBytes == 4 + (4 + innerArray.getSizeInBytes))
     }
 
-    assert(field2.getSizeInBytes == keyArray.getSizeInBytes + valueArray.getSizeInBytes)
+    assert(field2.getSizeInBytes == 4 + keyArray.getSizeInBytes + valueArray.getSizeInBytes)
 
     assert(unsafeRow.getSizeInBytes ==
-      8 + 8 * 2 + arraySizeInRow(field1.getSizeInBytes) + mapSizeInRow(field2.getSizeInBytes))
+      8 + 8 * 2 + roundedSize(field1.getSizeInBytes) + roundedSize(field2.getSizeInBytes))
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index 2bc2c96b6163..a41f04dd3b59 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -482,12 +482,14 @@ private[sql] case class STRUCT(dataType: StructType) extends ColumnType[UnsafeRo
   override def extract(buffer: ByteBuffer): UnsafeRow = {
     val sizeInBytes = buffer.getInt()
     assert(buffer.hasArray)
-    val base = buffer.array()
-    val offset = buffer.arrayOffset()
     val cursor = buffer.position()
     buffer.position(cursor + sizeInBytes)
     val unsafeRow = new UnsafeRow
-    unsafeRow.pointTo(base, Platform.BYTE_ARRAY_OFFSET + offset + cursor, numOfFields, sizeInBytes)
+    unsafeRow.pointTo(
+      buffer.array(),
+      Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + cursor,
+      numOfFields,
+      sizeInBytes)
     unsafeRow
   }
 
@@ -508,12 +510,11 @@ private[sql] case class ARRAY(dataType: ArrayType) extends ColumnType[UnsafeArra
 
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
     val unsafeArray = getField(row, ordinal)
-    4 + 4 + unsafeArray.getSizeInBytes
+    4 + unsafeArray.getSizeInBytes
   }
 
   override def append(value: UnsafeArrayData, buffer: ByteBuffer): Unit = {
-    buffer.putInt(4 + value.getSizeInBytes)
-    buffer.putInt(value.numElements())
+    buffer.putInt(value.getSizeInBytes)
     value.writeTo(buffer)
   }
 
@@ -522,10 +523,12 @@ private[sql] case class ARRAY(dataType: ArrayType) extends ColumnType[UnsafeArra
     assert(buffer.hasArray)
     val cursor = buffer.position()
     buffer.position(cursor + numBytes)
-    UnsafeReaders.readArray(
+    val array = new UnsafeArrayData
+    array.pointTo(
       buffer.array(),
       Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + cursor,
       numBytes)
+    array
   }
 
   override def clone(v: UnsafeArrayData): UnsafeArrayData = v.copy()
@@ -545,15 +548,12 @@ private[sql] case class MAP(dataType: MapType) extends ColumnType[UnsafeMapData]
 
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
     val unsafeMap = getField(row, ordinal)
-    12 + unsafeMap.keyArray().getSizeInBytes + unsafeMap.valueArray().getSizeInBytes
+    4 + unsafeMap.getSizeInBytes
   }
 
   override def append(value: UnsafeMapData, buffer: ByteBuffer): Unit = {
-    buffer.putInt(8 + value.keyArray().getSizeInBytes + value.valueArray().getSizeInBytes)
-    buffer.putInt(value.numElements())
-    buffer.putInt(value.keyArray().getSizeInBytes)
-    value.keyArray().writeTo(buffer)
-    value.valueArray().writeTo(buffer)
+    buffer.putInt(value.getSizeInBytes)
+    value.writeTo(buffer)
   }
 
   override def extract(buffer: ByteBuffer): UnsafeMapData = {
@@ -561,10 +561,12 @@ private[sql] case class MAP(dataType: MapType) extends ColumnType[UnsafeMapData]
     assert(buffer.hasArray)
     val cursor = buffer.position()
     buffer.position(cursor + numBytes)
-    UnsafeReaders.readMap(
+    val map = new UnsafeMapData
+    map.pointTo(
       buffer.array(),
       Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + cursor,
       numBytes)
+    map
   }
 
   override def clone(v: UnsafeMapData): UnsafeMapData = v.copy()
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
index 0e6e1bcf7289..63bc39bfa030 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
@@ -73,7 +73,7 @@ class ColumnTypeSuite extends SparkFunSuite with Logging {
     checkActualSize(COMPACT_DECIMAL(15, 10), Decimal(0, 15, 10), 8)
     checkActualSize(LARGE_DECIMAL(20, 10), Decimal(0, 20, 10), 5)
     checkActualSize(ARRAY_TYPE, Array[Any](1), 16)
-    checkActualSize(MAP_TYPE, Map(1 -> "a"), 25)
+    checkActualSize(MAP_TYPE, Map(1 -> "a"), 29)
     checkActualSize(STRUCT_TYPE, Row("hello"), 28)
   }
 

From 5966817941b57251fbd1cf8b9b458ec389c071a0 Mon Sep 17 00:00:00 2001
From: Rishabh Bhardwaj <rbnext29@gmail.com>
Date: Mon, 19 Oct 2015 14:38:49 -0700
Subject: [PATCH 286/896] [SPARK-11180][SQL] Support BooleanType in
 DataFrame.na.fill

Added support for boolean types in fill and replace methods

Author: Rishabh Bhardwaj <rbnext29@gmail.com>

Closes #9166 from rishabhbhardwaj/master.
---
 .../spark/sql/DataFrameNaFunctions.scala      | 29 ++++++++++++-------
 .../spark/sql/DataFrameNaFunctionsSuite.scala | 14 +++++----
 2 files changed, 27 insertions(+), 16 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala
index 77a42c0873a6..f7be5f6b370a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameNaFunctions.scala
@@ -198,7 +198,8 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
    * Returns a new [[DataFrame]] that replaces null values.
    *
    * The key of the map is the column name, and the value of the map is the replacement value.
-   * The value must be of the following type: `Integer`, `Long`, `Float`, `Double`, `String`.
+   * The value must be of the following type:
+   * `Integer`, `Long`, `Float`, `Double`, `String`, `Boolean`.
    *
    * For example, the following replaces null values in column "A" with string "unknown", and
    * null values in column "B" with numeric value 1.0.
@@ -215,7 +216,7 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
    * (Scala-specific) Returns a new [[DataFrame]] that replaces null values.
    *
    * The key of the map is the column name, and the value of the map is the replacement value.
-   * The value must be of the following type: `Int`, `Long`, `Float`, `Double`, `String`.
+   * The value must be of the following type: `Int`, `Long`, `Float`, `Double`, `String`, `Boolean`.
    *
    * For example, the following replaces null values in column "A" with string "unknown", and
    * null values in column "B" with numeric value 1.0.
@@ -232,7 +233,8 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
 
   /**
    * Replaces values matching keys in `replacement` map with the corresponding values.
-   * Key and value of `replacement` map must have the same type, and can only be doubles or strings.
+   * Key and value of `replacement` map must have the same type, and
+   * can only be doubles, strings or booleans.
    * If `col` is "*", then the replacement is applied on all string columns or numeric columns.
    *
    * {{{
@@ -259,7 +261,8 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
 
   /**
    * Replaces values matching keys in `replacement` map with the corresponding values.
-   * Key and value of `replacement` map must have the same type, and can only be doubles or strings.
+   * Key and value of `replacement` map must have the same type, and
+   * can only be doubles, strings or booleans.
    *
    * {{{
    *   import com.google.common.collect.ImmutableMap;
@@ -282,8 +285,10 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
 
   /**
    * (Scala-specific) Replaces values matching keys in `replacement` map.
-   * Key and value of `replacement` map must have the same type, and can only be doubles or strings.
-   * If `col` is "*", then the replacement is applied on all string columns or numeric columns.
+   * Key and value of `replacement` map must have the same type, and
+   * can only be doubles, strings or booleans.
+   * If `col` is "*",
+   * then the replacement is applied on all string columns , numeric columns or boolean columns.
    *
    * {{{
    *   // Replaces all occurrences of 1.0 with 2.0 in column "height".
@@ -311,7 +316,8 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
 
   /**
    * (Scala-specific) Replaces values matching keys in `replacement` map.
-   * Key and value of `replacement` map must have the same type, and can only be doubles or strings.
+   * Key and value of `replacement` map must have the same type, and
+   * can only be doubles , strings or booleans.
    *
    * {{{
    *   // Replaces all occurrences of 1.0 with 2.0 in column "height" and "weight".
@@ -333,15 +339,17 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
       return df
     }
 
-    // replacementMap is either Map[String, String] or Map[Double, Double]
+    // replacementMap is either Map[String, String] or Map[Double, Double] or Map[Boolean,Boolean]
     val replacementMap: Map[_, _] = replacement.head._2 match {
       case v: String => replacement
+      case v: Boolean => replacement
       case _ => replacement.map { case (k, v) => (convertToDouble(k), convertToDouble(v)) }
     }
 
-    // targetColumnType is either DoubleType or StringType
+    // targetColumnType is either DoubleType or StringType or BooleanType
     val targetColumnType = replacement.head._1 match {
       case _: jl.Double | _: jl.Float | _: jl.Integer | _: jl.Long => DoubleType
+      case _: jl.Boolean => BooleanType
       case _: String => StringType
     }
 
@@ -367,7 +375,7 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
 
       // Check data type
       replaceValue match {
-        case _: jl.Double | _: jl.Float | _: jl.Integer | _: jl.Long | _: String =>
+        case _: jl.Double | _: jl.Float | _: jl.Integer | _: jl.Long | _: jl.Boolean | _: String =>
           // This is good
         case _ => throw new IllegalArgumentException(
           s"Unsupported value type ${replaceValue.getClass.getName} ($replaceValue).")
@@ -382,6 +390,7 @@ final class DataFrameNaFunctions private[sql](df: DataFrame) {
           case v: jl.Double => fillCol[Double](f, v)
           case v: jl.Long => fillCol[Double](f, v.toDouble)
           case v: jl.Integer => fillCol[Double](f, v.toDouble)
+          case v: jl.Boolean => fillCol[Boolean](f, v.booleanValue())
           case v: String => fillCol[String](f, v)
         }
       }.getOrElse(df.col(f.name))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameNaFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameNaFunctionsSuite.scala
index 329ffb66083b..e34875471f09 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameNaFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameNaFunctionsSuite.scala
@@ -141,24 +141,26 @@ class DataFrameNaFunctionsSuite extends QueryTest with SharedSQLContext {
   }
 
   test("fill with map") {
-    val df = Seq[(String, String, java.lang.Long, java.lang.Double)](
-      (null, null, null, null)).toDF("a", "b", "c", "d")
+    val df = Seq[(String, String, java.lang.Long, java.lang.Double, java.lang.Boolean)](
+      (null, null, null, null, null)).toDF("a", "b", "c", "d", "e")
     checkAnswer(
       df.na.fill(Map(
         "a" -> "test",
         "c" -> 1,
-        "d" -> 2.2
+        "d" -> 2.2,
+        "e" -> false
       )),
-      Row("test", null, 1, 2.2))
+      Row("test", null, 1, 2.2, false))
 
     // Test Java version
     checkAnswer(
       df.na.fill(Map(
         "a" -> "test",
         "c" -> 1,
-        "d" -> 2.2
+        "d" -> 2.2,
+        "e" -> false
       ).asJava),
-      Row("test", null, 1, 2.2))
+      Row("test", null, 1, 2.2, false))
   }
 
   test("replace") {

From 67582132bffbaaeaadc5cf8218f6239d03c39da0 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Mon, 19 Oct 2015 15:35:14 -0700
Subject: [PATCH 287/896] [SPARK-11063] [STREAMING] Change preferredLocations
 of Receiver's RDD to hosts rather than hostports

The format of RDD's preferredLocations must be hostname but the format of Streaming Receiver's scheduling executors is hostport. So it doesn't work.

This PR converts `schedulerExecutors` to `hosts` before creating Receiver's RDD.

Author: zsxwing <zsxwing@gmail.com>

Closes #9075 from zsxwing/SPARK-11063.
---
 .../scheduler/ReceiverSchedulingPolicy.scala  |  3 ++-
 .../streaming/scheduler/ReceiverTracker.scala |  4 +++-
 .../scheduler/ReceiverTrackerSuite.scala      | 24 +++++++++++++++++++
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
index 10b5a7f57a80..d2b0be7f4a9c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
@@ -21,6 +21,7 @@ import scala.collection.Map
 import scala.collection.mutable
 
 import org.apache.spark.streaming.receiver.Receiver
+import org.apache.spark.util.Utils
 
 /**
  * A class that tries to schedule receivers with evenly distributed. There are two phases for
@@ -79,7 +80,7 @@ private[streaming] class ReceiverSchedulingPolicy {
       return receivers.map(_.streamId -> Seq.empty).toMap
     }
 
-    val hostToExecutors = executors.groupBy(_.split(":")(0))
+    val hostToExecutors = executors.groupBy(executor => Utils.parseHostPort(executor)._1)
     val scheduledExecutors = Array.fill(receivers.length)(new mutable.ArrayBuffer[String])
     val numReceiversOnExecutor = mutable.HashMap[String, Int]()
     // Set the initial value to 0
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index d053e9e84910..2ce80d618b0a 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -551,7 +551,9 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
         if (scheduledExecutors.isEmpty) {
           ssc.sc.makeRDD(Seq(receiver), 1)
         } else {
-          ssc.sc.makeRDD(Seq(receiver -> scheduledExecutors))
+          val preferredLocations =
+            scheduledExecutors.map(hostPort => Utils.parseHostPort(hostPort)._1).distinct
+          ssc.sc.makeRDD(Seq(receiver -> preferredLocations))
         }
       receiverRDD.setName(s"Receiver $receiverId")
       ssc.sparkContext.setJobDescription(s"Streaming job running receiver $receiverId")
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
index 45138b748eca..fda86aef457d 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
@@ -22,6 +22,8 @@ import scala.collection.mutable.ArrayBuffer
 import org.scalatest.concurrent.Eventually._
 import org.scalatest.time.SpanSugar._
 
+import org.apache.spark.scheduler.{SparkListener, SparkListenerTaskStart, TaskLocality}
+import org.apache.spark.scheduler.TaskLocality.TaskLocality
 import org.apache.spark.storage.{StorageLevel, StreamBlockId}
 import org.apache.spark.streaming._
 import org.apache.spark.streaming.dstream.ReceiverInputDStream
@@ -80,6 +82,28 @@ class ReceiverTrackerSuite extends TestSuiteBase {
       }
     }
   }
+
+  test("SPARK-11063: TaskSetManager should use Receiver RDD's preferredLocations") {
+    // Use ManualClock to prevent from starting batches so that we can make sure the only task is
+    // for starting the Receiver
+    val _conf = conf.clone.set("spark.streaming.clock", "org.apache.spark.util.ManualClock")
+    withStreamingContext(new StreamingContext(_conf, Milliseconds(100))) { ssc =>
+      @volatile var receiverTaskLocality: TaskLocality = null
+      ssc.sparkContext.addSparkListener(new SparkListener {
+        override def onTaskStart(taskStart: SparkListenerTaskStart): Unit = {
+          receiverTaskLocality = taskStart.taskInfo.taskLocality
+        }
+      })
+      val input = ssc.receiverStream(new TestReceiver)
+      val output = new TestOutputStream(input)
+      output.register()
+      ssc.start()
+      eventually(timeout(10 seconds), interval(10 millis)) {
+        // If preferredLocations is set correctly, receiverTaskLocality should be NODE_LOCAL
+        assert(receiverTaskLocality === TaskLocality.NODE_LOCAL)
+      }
+    }
+  }
 }
 
 /** An input DStream with for testing rate controlling */

From 7ab0ce6501c37f0fc3a49e3332573ae4e4def3e8 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 19 Oct 2015 16:14:50 -0700
Subject: [PATCH 288/896] [SPARK-11131][CORE] Fix race in worker registration
 protocol.

Because the registration RPC was not really an RPC, but a bunch of
disconnected messages, it was possible for other messages to be
sent before the reply to the registration arrived, and that would
confuse the Worker. Especially in local-cluster mode, the worker was
succeptible to receiving an executor request before it received a
message from the master saying registration succeeded.

On top of the above, the change also fixes a ClassCastException when
the registration fails, which also affects the executor registration
protocol. Because the `ask` is issued with a specific return type,
if the error message (of a different type) was returned instead, the
code would just die with an exception. This is fixed by having a common
base trait for these reply messages.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9138 from vanzin/SPARK-11131.
---
 .../apache/spark/deploy/DeployMessage.scala   |  7 +-
 .../apache/spark/deploy/master/Master.scala   | 50 ++++++-------
 .../apache/spark/deploy/worker/Worker.scala   | 73 ++++++++++++-------
 .../CoarseGrainedExecutorBackend.scala        |  4 +-
 .../cluster/CoarseGrainedClusterMessage.scala |  4 +
 .../apache/spark/HeartbeatReceiverSuite.scala |  4 +-
 6 files changed, 86 insertions(+), 56 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/DeployMessage.scala b/core/src/main/scala/org/apache/spark/deploy/DeployMessage.scala
index d8084a57658a..3feb7cea593e 100644
--- a/core/src/main/scala/org/apache/spark/deploy/DeployMessage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/DeployMessage.scala
@@ -69,9 +69,14 @@ private[deploy] object DeployMessages {
 
   // Master to Worker
 
+  sealed trait RegisterWorkerResponse
+
   case class RegisteredWorker(master: RpcEndpointRef, masterWebUiUrl: String) extends DeployMessage
+    with RegisterWorkerResponse
+
+  case class RegisterWorkerFailed(message: String) extends DeployMessage with RegisterWorkerResponse
 
-  case class RegisterWorkerFailed(message: String) extends DeployMessage
+  case object MasterInStandby extends DeployMessage with RegisterWorkerResponse
 
   case class ReconnectWorker(masterUrl: String) extends DeployMessage
 
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
index d518e92133aa..6715d6c70f49 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
@@ -233,31 +233,6 @@ private[deploy] class Master(
       System.exit(0)
     }
 
-    case RegisterWorker(
-        id, workerHost, workerPort, workerRef, cores, memory, workerUiPort, publicAddress) => {
-      logInfo("Registering worker %s:%d with %d cores, %s RAM".format(
-        workerHost, workerPort, cores, Utils.megabytesToString(memory)))
-      if (state == RecoveryState.STANDBY) {
-        // ignore, don't send response
-      } else if (idToWorker.contains(id)) {
-        workerRef.send(RegisterWorkerFailed("Duplicate worker ID"))
-      } else {
-        val worker = new WorkerInfo(id, workerHost, workerPort, cores, memory,
-          workerRef, workerUiPort, publicAddress)
-        if (registerWorker(worker)) {
-          persistenceEngine.addWorker(worker)
-          workerRef.send(RegisteredWorker(self, masterWebUiUrl))
-          schedule()
-        } else {
-          val workerAddress = worker.endpoint.address
-          logWarning("Worker registration failed. Attempted to re-register worker at same " +
-            "address: " + workerAddress)
-          workerRef.send(RegisterWorkerFailed("Attempted to re-register worker at same address: "
-            + workerAddress))
-        }
-      }
-    }
-
     case RegisterApplication(description, driver) => {
       // TODO Prevent repeated registrations from some driver
       if (state == RecoveryState.STANDBY) {
@@ -387,6 +362,31 @@ private[deploy] class Master(
   }
 
   override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
+    case RegisterWorker(
+        id, workerHost, workerPort, workerRef, cores, memory, workerUiPort, publicAddress) => {
+      logInfo("Registering worker %s:%d with %d cores, %s RAM".format(
+        workerHost, workerPort, cores, Utils.megabytesToString(memory)))
+      if (state == RecoveryState.STANDBY) {
+        context.reply(MasterInStandby)
+      } else if (idToWorker.contains(id)) {
+        context.reply(RegisterWorkerFailed("Duplicate worker ID"))
+      } else {
+        val worker = new WorkerInfo(id, workerHost, workerPort, cores, memory,
+          workerRef, workerUiPort, publicAddress)
+        if (registerWorker(worker)) {
+          persistenceEngine.addWorker(worker)
+          context.reply(RegisteredWorker(self, masterWebUiUrl))
+          schedule()
+        } else {
+          val workerAddress = worker.endpoint.address
+          logWarning("Worker registration failed. Attempted to re-register worker at same " +
+            "address: " + workerAddress)
+          context.reply(RegisterWorkerFailed("Attempted to re-register worker at same address: "
+            + workerAddress))
+        }
+      }
+    }
+
     case RequestSubmitDriver(description) => {
       if (state != RecoveryState.ALIVE) {
         val msg = s"${Utils.BACKUP_STANDALONE_MASTER_PREFIX}: $state. " +
diff --git a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
index 93a1b3f31042..a45867e7680e 100755
--- a/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/worker/Worker.scala
@@ -26,7 +26,7 @@ import java.util.concurrent.{Future => JFuture, ScheduledFuture => JScheduledFut
 
 import scala.collection.mutable.{HashMap, HashSet, LinkedHashMap}
 import scala.concurrent.ExecutionContext
-import scala.util.Random
+import scala.util.{Failure, Random, Success}
 import scala.util.control.NonFatal
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf}
@@ -213,8 +213,7 @@ private[deploy] class Worker(
             logInfo("Connecting to master " + masterAddress + "...")
             val masterEndpoint =
               rpcEnv.setupEndpointRef(Master.SYSTEM_NAME, masterAddress, Master.ENDPOINT_NAME)
-            masterEndpoint.send(RegisterWorker(
-              workerId, host, port, self, cores, memory, webUi.boundPort, publicAddress))
+            registerWithMaster(masterEndpoint)
           } catch {
             case ie: InterruptedException => // Cancelled
             case NonFatal(e) => logWarning(s"Failed to connect to master $masterAddress", e)
@@ -271,8 +270,7 @@ private[deploy] class Worker(
                   logInfo("Connecting to master " + masterAddress + "...")
                   val masterEndpoint =
                     rpcEnv.setupEndpointRef(Master.SYSTEM_NAME, masterAddress, Master.ENDPOINT_NAME)
-                  masterEndpoint.send(RegisterWorker(
-                    workerId, host, port, self, cores, memory, webUi.boundPort, publicAddress))
+                  registerWithMaster(masterEndpoint)
                 } catch {
                   case ie: InterruptedException => // Cancelled
                   case NonFatal(e) => logWarning(s"Failed to connect to master $masterAddress", e)
@@ -341,25 +339,54 @@ private[deploy] class Worker(
     }
   }
 
-  override def receive: PartialFunction[Any, Unit] = {
-    case RegisteredWorker(masterRef, masterWebUiUrl) =>
-      logInfo("Successfully registered with master " + masterRef.address.toSparkURL)
-      registered = true
-      changeMaster(masterRef, masterWebUiUrl)
-      forwordMessageScheduler.scheduleAtFixedRate(new Runnable {
-        override def run(): Unit = Utils.tryLogNonFatalError {
-          self.send(SendHeartbeat)
-        }
-      }, 0, HEARTBEAT_MILLIS, TimeUnit.MILLISECONDS)
-      if (CLEANUP_ENABLED) {
-        logInfo(s"Worker cleanup enabled; old application directories will be deleted in: $workDir")
+  private def registerWithMaster(masterEndpoint: RpcEndpointRef): Unit = {
+    masterEndpoint.ask[RegisterWorkerResponse](RegisterWorker(
+      workerId, host, port, self, cores, memory, webUi.boundPort, publicAddress))
+      .onComplete {
+        // This is a very fast action so we can use "ThreadUtils.sameThread"
+        case Success(msg) =>
+          Utils.tryLogNonFatalError {
+            handleRegisterResponse(msg)
+          }
+        case Failure(e) =>
+          logError(s"Cannot register with master: ${masterEndpoint.address}", e)
+          System.exit(1)
+      }(ThreadUtils.sameThread)
+  }
+
+  private def handleRegisterResponse(msg: RegisterWorkerResponse): Unit = synchronized {
+    msg match {
+      case RegisteredWorker(masterRef, masterWebUiUrl) =>
+        logInfo("Successfully registered with master " + masterRef.address.toSparkURL)
+        registered = true
+        changeMaster(masterRef, masterWebUiUrl)
         forwordMessageScheduler.scheduleAtFixedRate(new Runnable {
           override def run(): Unit = Utils.tryLogNonFatalError {
-            self.send(WorkDirCleanup)
+            self.send(SendHeartbeat)
           }
-        }, CLEANUP_INTERVAL_MILLIS, CLEANUP_INTERVAL_MILLIS, TimeUnit.MILLISECONDS)
-      }
+        }, 0, HEARTBEAT_MILLIS, TimeUnit.MILLISECONDS)
+        if (CLEANUP_ENABLED) {
+          logInfo(
+            s"Worker cleanup enabled; old application directories will be deleted in: $workDir")
+          forwordMessageScheduler.scheduleAtFixedRate(new Runnable {
+            override def run(): Unit = Utils.tryLogNonFatalError {
+              self.send(WorkDirCleanup)
+            }
+          }, CLEANUP_INTERVAL_MILLIS, CLEANUP_INTERVAL_MILLIS, TimeUnit.MILLISECONDS)
+        }
 
+      case RegisterWorkerFailed(message) =>
+        if (!registered) {
+          logError("Worker registration failed: " + message)
+          System.exit(1)
+        }
+
+      case MasterInStandby =>
+        // Ignore. Master not yet ready.
+    }
+  }
+
+  override def receive: PartialFunction[Any, Unit] = synchronized {
     case SendHeartbeat =>
       if (connected) { sendToMaster(Heartbeat(workerId, self)) }
 
@@ -399,12 +426,6 @@ private[deploy] class Worker(
         map(e => new ExecutorDescription(e.appId, e.execId, e.cores, e.state))
       masterRef.send(WorkerSchedulerStateResponse(workerId, execs.toList, drivers.keys.toSeq))
 
-    case RegisterWorkerFailed(message) =>
-      if (!registered) {
-        logError("Worker registration failed: " + message)
-        System.exit(1)
-      }
-
     case ReconnectWorker(masterUrl) =>
       logInfo(s"Master with url $masterUrl requested this worker to reconnect.")
       registerWithMaster()
diff --git a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
index 49059de50b42..a9c6a05ecd43 100644
--- a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
+++ b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
@@ -59,12 +59,12 @@ private[spark] class CoarseGrainedExecutorBackend(
     rpcEnv.asyncSetupEndpointRefByURI(driverUrl).flatMap { ref =>
       // This is a very fast action so we can use "ThreadUtils.sameThread"
       driver = Some(ref)
-      ref.ask[RegisteredExecutor.type](
+      ref.ask[RegisterExecutorResponse](
         RegisterExecutor(executorId, self, hostPort, cores, extractLogUrls))
     }(ThreadUtils.sameThread).onComplete {
       // This is a very fast action so we can use "ThreadUtils.sameThread"
       case Success(msg) => Utils.tryLogNonFatalError {
-        Option(self).foreach(_.send(msg)) // msg must be RegisteredExecutor
+        Option(self).foreach(_.send(msg)) // msg must be RegisterExecutorResponse
       }
       case Failure(e) => {
         logError(s"Cannot register with driver: $driverUrl", e)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
index e0d25dc50c98..4652df32efa7 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
@@ -36,9 +36,13 @@ private[spark] object CoarseGrainedClusterMessages {
   case class KillTask(taskId: Long, executor: String, interruptThread: Boolean)
     extends CoarseGrainedClusterMessage
 
+  sealed trait RegisterExecutorResponse
+
   case object RegisteredExecutor extends CoarseGrainedClusterMessage
+    with RegisterExecutorResponse
 
   case class RegisterExecutorFailed(message: String) extends CoarseGrainedClusterMessage
+    with RegisterExecutorResponse
 
   // Executors to driver
   case class RegisterExecutor(
diff --git a/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala b/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
index 18f2229fea39..3cd80c0f7d17 100644
--- a/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
+++ b/core/src/test/scala/org/apache/spark/HeartbeatReceiverSuite.scala
@@ -173,9 +173,9 @@ class HeartbeatReceiverSuite
     val dummyExecutorEndpoint2 = new FakeExecutorEndpoint(rpcEnv)
     val dummyExecutorEndpointRef1 = rpcEnv.setupEndpoint("fake-executor-1", dummyExecutorEndpoint1)
     val dummyExecutorEndpointRef2 = rpcEnv.setupEndpoint("fake-executor-2", dummyExecutorEndpoint2)
-    fakeSchedulerBackend.driverEndpoint.askWithRetry[RegisteredExecutor.type](
+    fakeSchedulerBackend.driverEndpoint.askWithRetry[RegisterExecutorResponse](
       RegisterExecutor(executorId1, dummyExecutorEndpointRef1, "dummy:4040", 0, Map.empty))
-    fakeSchedulerBackend.driverEndpoint.askWithRetry[RegisteredExecutor.type](
+    fakeSchedulerBackend.driverEndpoint.askWithRetry[RegisterExecutorResponse](
       RegisterExecutor(executorId2, dummyExecutorEndpointRef2, "dummy:4040", 0, Map.empty))
     heartbeatReceiverRef.askWithRetry[Boolean](TaskSchedulerIsSet)
     addExecutorAndVerify(executorId1)

From a1413b3662250dd5e980e8b1f7c3dc4585ab4766 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 19 Oct 2015 16:16:31 -0700
Subject: [PATCH 289/896] [SPARK-11051][CORE] Do not allow local checkpointing
 after the RDD is materialized and checkpointed

JIRA: https://issues.apache.org/jira/browse/SPARK-11051

When a `RDD` is materialized and checkpointed, its partitions and dependencies are cleared. If we allow local checkpointing on it and assign `LocalRDDCheckpointData` to its `checkpointData`. Next time when the RDD is materialized again, the error will be thrown.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9072 from viirya/no-localcheckpoint-after-checkpoint.
---
 .../main/scala/org/apache/spark/rdd/RDD.scala | 35 +++++++++++++++----
 .../org/apache/spark/CheckpointSuite.scala    |  4 +++
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/RDD.scala b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
index a56e542242d5..a97bb174438a 100644
--- a/core/src/main/scala/org/apache/spark/rdd/RDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
@@ -294,7 +294,11 @@ abstract class RDD[T: ClassTag](
    */
   private[spark] def computeOrReadCheckpoint(split: Partition, context: TaskContext): Iterator[T] =
   {
-    if (isCheckpointed) firstParent[T].iterator(split, context) else compute(split, context)
+    if (isCheckpointedAndMaterialized) {
+      firstParent[T].iterator(split, context)
+    } else {
+      compute(split, context)
+    }
   }
 
   /**
@@ -1520,20 +1524,37 @@ abstract class RDD[T: ClassTag](
       persist(LocalRDDCheckpointData.transformStorageLevel(storageLevel), allowOverride = true)
     }
 
-    checkpointData match {
-      case Some(reliable: ReliableRDDCheckpointData[_]) => logWarning(
-        "RDD was already marked for reliable checkpointing: overriding with local checkpoint.")
-      case _ =>
+    // If this RDD is already checkpointed and materialized, its lineage is already truncated.
+    // We must not override our `checkpointData` in this case because it is needed to recover
+    // the checkpointed data. If it is overridden, next time materializing on this RDD will
+    // cause error.
+    if (isCheckpointedAndMaterialized) {
+      logWarning("Not marking RDD for local checkpoint because it was already " +
+        "checkpointed and materialized")
+    } else {
+      // Lineage is not truncated yet, so just override any existing checkpoint data with ours
+      checkpointData match {
+        case Some(_: ReliableRDDCheckpointData[_]) => logWarning(
+          "RDD was already marked for reliable checkpointing: overriding with local checkpoint.")
+        case _ =>
+      }
+      checkpointData = Some(new LocalRDDCheckpointData(this))
     }
-    checkpointData = Some(new LocalRDDCheckpointData(this))
     this
   }
 
   /**
-   * Return whether this RDD is marked for checkpointing, either reliably or locally.
+   * Return whether this RDD is checkpointed and materialized, either reliably or locally.
    */
   def isCheckpointed: Boolean = checkpointData.exists(_.isCheckpointed)
 
+  /**
+   * Return whether this RDD is checkpointed and materialized, either reliably or locally.
+   * This is introduced as an alias for `isCheckpointed` to clarify the semantics of the
+   * return value. Exposed for testing.
+   */
+  private[spark] def isCheckpointedAndMaterialized: Boolean = isCheckpointed
+
   /**
    * Return whether this RDD is marked for local checkpointing.
    * Exposed for testing.
diff --git a/core/src/test/scala/org/apache/spark/CheckpointSuite.scala b/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
index 4d70bfed909b..119e5fc28e41 100644
--- a/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
+++ b/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
@@ -241,9 +241,13 @@ class CheckpointSuite extends SparkFunSuite with LocalSparkContext with Logging
     val rdd = new BlockRDD[Int](sc, Array[BlockId]())
     assert(rdd.partitions.size === 0)
     assert(rdd.isCheckpointed === false)
+    assert(rdd.isCheckpointedAndMaterialized === false)
     checkpoint(rdd, reliableCheckpoint)
+    assert(rdd.isCheckpointed === false)
+    assert(rdd.isCheckpointedAndMaterialized === false)
     assert(rdd.count() === 0)
     assert(rdd.isCheckpointed === true)
+    assert(rdd.isCheckpointedAndMaterialized === true)
     assert(rdd.partitions.size === 0)
   }
 

From 232d7f8d42950431f1d9be2a6bb3591fb6ea20d6 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 19 Oct 2015 16:18:20 -0700
Subject: [PATCH 290/896] [SPARK-11114][PYSPARK] add getOrCreate for
 SparkContext/SQLContext in Python

Also added SQLContext.newSession()

Author: Davies Liu <davies@databricks.com>

Closes #9122 from davies/py_create.
---
 python/pyspark/context.py     | 16 ++++++++++++++--
 python/pyspark/sql/context.py | 27 +++++++++++++++++++++++++++
 python/pyspark/sql/tests.py   | 14 ++++++++++++++
 python/pyspark/tests.py       |  4 ++++
 4 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/context.py b/python/pyspark/context.py
index 4969d85f52b2..afd74d937a41 100644
--- a/python/pyspark/context.py
+++ b/python/pyspark/context.py
@@ -21,7 +21,7 @@
 import shutil
 import signal
 import sys
-from threading import Lock
+from threading import RLock
 from tempfile import NamedTemporaryFile
 
 from pyspark import accumulators
@@ -65,7 +65,7 @@ class SparkContext(object):
     _jvm = None
     _next_accum_id = 0
     _active_spark_context = None
-    _lock = Lock()
+    _lock = RLock()
     _python_includes = None  # zip and egg files that need to be added to PYTHONPATH
 
     PACKAGE_EXTENSIONS = ('.zip', '.egg', '.jar')
@@ -280,6 +280,18 @@ def __exit__(self, type, value, trace):
         """
         self.stop()
 
+    @classmethod
+    def getOrCreate(cls, conf=None):
+        """
+        Get or instantiate a SparkContext and register it as a singleton object.
+
+        :param conf: SparkConf (optional)
+        """
+        with SparkContext._lock:
+            if SparkContext._active_spark_context is None:
+                SparkContext(conf=conf or SparkConf())
+            return SparkContext._active_spark_context
+
     def setLogLevel(self, logLevel):
         """
         Control our logLevel. This overrides any user-defined log settings.
diff --git a/python/pyspark/sql/context.py b/python/pyspark/sql/context.py
index 89c8c6e0d94f..79453658a167 100644
--- a/python/pyspark/sql/context.py
+++ b/python/pyspark/sql/context.py
@@ -75,6 +75,8 @@ class SQLContext(object):
         SQLContext in the JVM, instead we make all calls to this object.
     """
 
+    _instantiatedContext = None
+
     @ignore_unicode_prefix
     def __init__(self, sparkContext, sqlContext=None):
         """Creates a new SQLContext.
@@ -99,6 +101,8 @@ def __init__(self, sparkContext, sqlContext=None):
         self._scala_SQLContext = sqlContext
         _monkey_patch_RDD(self)
         install_exception_handler()
+        if SQLContext._instantiatedContext is None:
+            SQLContext._instantiatedContext = self
 
     @property
     def _ssql_ctx(self):
@@ -111,6 +115,29 @@ def _ssql_ctx(self):
             self._scala_SQLContext = self._jvm.SQLContext(self._jsc.sc())
         return self._scala_SQLContext
 
+    @classmethod
+    @since(1.6)
+    def getOrCreate(cls, sc):
+        """
+        Get the existing SQLContext or create a new one with given SparkContext.
+
+        :param sc: SparkContext
+        """
+        if cls._instantiatedContext is None:
+            jsqlContext = sc._jvm.SQLContext.getOrCreate(sc._jsc.sc())
+            cls(sc, jsqlContext)
+        return cls._instantiatedContext
+
+    @since(1.6)
+    def newSession(self):
+        """
+        Returns a new SQLContext as new session, that has separate SQLConf,
+        registered temporary tables and UDFs, but shared SparkContext and
+        table cache.
+        """
+        jsqlContext = self._ssql_ctx.newSession()
+        return self.__class__(self._sc, jsqlContext)
+
     @since(1.3)
     def setConf(self, key, value):
         """Sets the given Spark SQL configuration property.
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index 645133b2b2d8..f465e1fa2094 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -174,6 +174,20 @@ def test_datetype_equal_zero(self):
         self.assertEqual(dt.fromInternal(0), datetime.date(1970, 1, 1))
 
 
+class SQLContextTests(ReusedPySparkTestCase):
+    def test_get_or_create(self):
+        sqlCtx = SQLContext.getOrCreate(self.sc)
+        self.assertTrue(SQLContext.getOrCreate(self.sc) is sqlCtx)
+
+    def test_new_session(self):
+        sqlCtx = SQLContext.getOrCreate(self.sc)
+        sqlCtx.setConf("test_key", "a")
+        sqlCtx2 = sqlCtx.newSession()
+        sqlCtx2.setConf("test_key", "b")
+        self.assertEqual(sqlCtx.getConf("test_key", ""), "a")
+        self.assertEqual(sqlCtx2.getConf("test_key", ""), "b")
+
+
 class SQLTests(ReusedPySparkTestCase):
 
     @classmethod
diff --git a/python/pyspark/tests.py b/python/pyspark/tests.py
index 63cc87e0c4b2..3c5180944440 100644
--- a/python/pyspark/tests.py
+++ b/python/pyspark/tests.py
@@ -1883,6 +1883,10 @@ def test_failed_sparkcontext_creation(self):
         # Regression test for SPARK-1550
         self.assertRaises(Exception, lambda: SparkContext("an-invalid-master-name"))
 
+    def test_get_or_create(self):
+        with SparkContext.getOrCreate() as sc:
+            self.assertTrue(SparkContext.getOrCreate() is sc)
+
     def test_stop(self):
         sc = SparkContext()
         self.assertNotEqual(SparkContext._active_spark_context, None)

From fc26f32cf1bede8b9a1343dca0c0182107c9985e Mon Sep 17 00:00:00 2001
From: Chris Bannister <chris.bannister@swiftkey.com>
Date: Mon, 19 Oct 2015 16:24:40 -0700
Subject: [PATCH 291/896] [SPARK-9708][MESOS] Spark should create local
 temporary directories in Mesos sandbox when launched with Mesos

This is my own original work and I license this to the project under the project's open source license

Author: Chris Bannister <chris.bannister@swiftkey.com>
Author: Chris Bannister <chris.bannister@swiftkey.net>

Closes #8358 from Zariel/mesos-local-dir.
---
 .../scala/org/apache/spark/util/Utils.scala     | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 22c05a247942..55950405f048 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -649,6 +649,7 @@ private[spark] object Utils extends Logging {
    * logic of locating the local directories according to deployment mode.
    */
   def getConfiguredLocalDirs(conf: SparkConf): Array[String] = {
+    val shuffleServiceEnabled = conf.getBoolean("spark.shuffle.service.enabled", false)
     if (isRunningInYarnContainer(conf)) {
       // If we are in yarn mode, systems can have different disk layouts so we must set it
       // to what Yarn on this system said was available. Note this assumes that Yarn has
@@ -657,13 +658,23 @@ private[spark] object Utils extends Logging {
       getYarnLocalDirs(conf).split(",")
     } else if (conf.getenv("SPARK_EXECUTOR_DIRS") != null) {
       conf.getenv("SPARK_EXECUTOR_DIRS").split(File.pathSeparator)
+    } else if (conf.getenv("SPARK_LOCAL_DIRS") != null) {
+      conf.getenv("SPARK_LOCAL_DIRS").split(",")
+    } else if (conf.getenv("MESOS_DIRECTORY") != null && !shuffleServiceEnabled) {
+      // Mesos already creates a directory per Mesos task. Spark should use that directory
+      // instead so all temporary files are automatically cleaned up when the Mesos task ends.
+      // Note that we don't want this if the shuffle service is enabled because we want to
+      // continue to serve shuffle files after the executors that wrote them have already exited.
+      Array(conf.getenv("MESOS_DIRECTORY"))
     } else {
+      if (conf.getenv("MESOS_DIRECTORY") != null && shuffleServiceEnabled) {
+        logInfo("MESOS_DIRECTORY available but not using provided Mesos sandbox because " +
+          "spark.shuffle.service.enabled is enabled.")
+      }
       // In non-Yarn mode (or for the driver in yarn-client mode), we cannot trust the user
       // configuration to point to a secure directory. So create a subdirectory with restricted
       // permissions under each listed directory.
-      Option(conf.getenv("SPARK_LOCAL_DIRS"))
-        .getOrElse(conf.get("spark.local.dir", System.getProperty("java.io.tmpdir")))
-        .split(",")
+      conf.get("spark.local.dir", System.getProperty("java.io.tmpdir")).split(",")
     }
   }
 

From 16906ef23a7aa2854c8cdcaa3bb3808ab39e0eec Mon Sep 17 00:00:00 2001
From: Ryan Williams <ryan.blake.williams@gmail.com>
Date: Mon, 19 Oct 2015 16:34:15 -0700
Subject: [PATCH 292/896] [SPARK-11120] Allow sane default number of executor
 failures when dynamically allocating in YARN

I also added some information to container-failure error msgs about what host they failed on, which would have helped me identify the problem that lead me to this JIRA and PR sooner.

Author: Ryan Williams <ryan.blake.williams@gmail.com>

Closes #9147 from ryan-williams/dyn-exec-failures.
---
 .../scala/org/apache/spark/SparkConf.scala    |  4 +++-
 .../spark/deploy/yarn/ApplicationMaster.scala | 19 +++++++++++++++----
 .../spark/deploy/yarn/YarnAllocator.scala     | 19 +++++++++++--------
 3 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkConf.scala b/core/src/main/scala/org/apache/spark/SparkConf.scala
index 1a0ac3d01759..58d3b846fd80 100644
--- a/core/src/main/scala/org/apache/spark/SparkConf.scala
+++ b/core/src/main/scala/org/apache/spark/SparkConf.scala
@@ -595,7 +595,9 @@ private[spark] object SparkConf extends Logging {
     "spark.rpc.lookupTimeout" -> Seq(
       AlternateConfig("spark.akka.lookupTimeout", "1.4")),
     "spark.streaming.fileStream.minRememberDuration" -> Seq(
-      AlternateConfig("spark.streaming.minRememberDuration", "1.5"))
+      AlternateConfig("spark.streaming.minRememberDuration", "1.5")),
+    "spark.yarn.max.executor.failures" -> Seq(
+      AlternateConfig("spark.yarn.max.worker.failures", "1.5"))
     )
 
   /**
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index d1d248bf79be..4b4d9990ce9f 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -62,10 +62,21 @@ private[spark] class ApplicationMaster(
     .asInstanceOf[YarnConfiguration]
   private val isClusterMode = args.userClass != null
 
-  // Default to numExecutors * 2, with minimum of 3
-  private val maxNumExecutorFailures = sparkConf.getInt("spark.yarn.max.executor.failures",
-    sparkConf.getInt("spark.yarn.max.worker.failures",
-      math.max(sparkConf.getInt("spark.executor.instances", 0) *  2, 3)))
+  // Default to twice the number of executors (twice the maximum number of executors if dynamic
+  // allocation is enabled), with a minimum of 3.
+
+  private val maxNumExecutorFailures = {
+    val defaultKey =
+      if (Utils.isDynamicAllocationEnabled(sparkConf)) {
+        "spark.dynamicAllocation.maxExecutors"
+      } else {
+        "spark.executor.instances"
+      }
+    val effectiveNumExecutors = sparkConf.getInt(defaultKey, 0)
+    val defaultMaxNumExecutorFailures = math.max(3, 2 * effectiveNumExecutors)
+
+    sparkConf.getInt("spark.yarn.max.executor.failures", defaultMaxNumExecutorFailures)
+  }
 
   @volatile private var exitCode = 0
   @volatile private var unregistered = false
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index 9e1ef1b3b422..1deaa3743ddf 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -430,17 +430,20 @@ private[yarn] class YarnAllocator(
     for (completedContainer <- completedContainers) {
       val containerId = completedContainer.getContainerId
       val alreadyReleased = releasedContainers.remove(containerId)
+      val hostOpt = allocatedContainerToHostMap.get(containerId)
+      val onHostStr = hostOpt.map(host => s" on host: $host").getOrElse("")
       val exitReason = if (!alreadyReleased) {
         // Decrement the number of executors running. The next iteration of
         // the ApplicationMaster's reporting thread will take care of allocating.
         numExecutorsRunning -= 1
-        logInfo("Completed container %s (state: %s, exit status: %s)".format(
+        logInfo("Completed container %s%s (state: %s, exit status: %s)".format(
           containerId,
+          onHostStr,
           completedContainer.getState,
           completedContainer.getExitStatus))
         // Hadoop 2.2.X added a ContainerExitStatus we should switch to use
         // there are some exit status' we shouldn't necessarily count against us, but for
-        // now I think its ok as none of the containers are expected to exit
+        // now I think its ok as none of the containers are expected to exit.
         val exitStatus = completedContainer.getExitStatus
         val (isNormalExit, containerExitReason) = exitStatus match {
           case ContainerExitStatus.SUCCESS =>
@@ -449,7 +452,7 @@ private[yarn] class YarnAllocator(
             // Preemption should count as a normal exit, since YARN preempts containers merely
             // to do resource sharing, and tasks that fail due to preempted executors could
             // just as easily finish on any other executor. See SPARK-8167.
-            (true, s"Container $containerId was preempted.")
+            (true, s"Container ${containerId}${onHostStr} was preempted.")
           // Should probably still count memory exceeded exit codes towards task failures
           case VMEM_EXCEEDED_EXIT_CODE =>
             (false, memLimitExceededLogMessage(
@@ -461,7 +464,7 @@ private[yarn] class YarnAllocator(
               PMEM_EXCEEDED_PATTERN))
           case unknown =>
             numExecutorsFailed += 1
-            (false, "Container marked as failed: " + containerId +
+            (false, "Container marked as failed: " + containerId + onHostStr +
               ". Exit status: " + completedContainer.getExitStatus +
               ". Diagnostics: " + completedContainer.getDiagnostics)
 
@@ -479,10 +482,10 @@ private[yarn] class YarnAllocator(
           s"Container $containerId exited from explicit termination request.")
       }
 
-      if (allocatedContainerToHostMap.contains(containerId)) {
-        val host = allocatedContainerToHostMap.get(containerId).get
-        val containerSet = allocatedHostToContainersMap.get(host).get
-
+      for {
+        host <- hostOpt
+        containerSet <- allocatedHostToContainersMap.get(host)
+      } {
         containerSet.remove(containerId)
         if (containerSet.isEmpty) {
           allocatedHostToContainersMap.remove(host)

From 8b877cc4ee46cad9d1f7cac451801c1410f6c1fe Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Mon, 19 Oct 2015 16:57:20 -0700
Subject: [PATCH 293/896] [SPARK-11088][SQL] Merges partition values using
 UnsafeProjection

`DataSourceStrategy.mergeWithPartitionValues` is essentially a projection implemented in a quite inefficient way. This PR optimizes this method with `UnsafeProjection` to avoid unnecessary boxing costs.

Author: Cheng Lian <lian@databricks.com>

Closes #9104 from liancheng/spark-11088.faster-partition-values-merging.
---
 .../datasources/DataSourceStrategy.scala      | 73 ++++++-------------
 1 file changed, 24 insertions(+), 49 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 33181fa6c065..ffb4645b8932 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -140,29 +140,30 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     val sharedHadoopConf = SparkHadoopUtil.get.conf
     val confBroadcast =
       relation.sqlContext.sparkContext.broadcast(new SerializableConfiguration(sharedHadoopConf))
+    val partitionColumnNames = partitionColumns.fieldNames.toSet
 
     // Now, we create a scan builder, which will be used by pruneFilterProject. This scan builder
     // will union all partitions and attach partition values if needed.
     val scanBuilder = {
-      (columns: Seq[Attribute], filters: Array[Filter]) => {
+      (requiredColumns: Seq[Attribute], filters: Array[Filter]) => {
+        val requiredDataColumns =
+          requiredColumns.filterNot(c => partitionColumnNames.contains(c.name))
+
         // Builds RDD[Row]s for each selected partition.
         val perPartitionRows = partitions.map { case Partition(partitionValues, dir) =>
-          val partitionColNames = partitionColumns.fieldNames
-
           // Don't scan any partition columns to save I/O.  Here we are being optimistic and
           // assuming partition columns data stored in data files are always consistent with those
           // partition values encoded in partition directory paths.
-          val needed = columns.filterNot(a => partitionColNames.contains(a.name))
-          val dataRows =
-            relation.buildScan(needed.map(_.name).toArray, filters, Array(dir), confBroadcast)
+          val dataRows = relation.buildScan(
+            requiredDataColumns.map(_.name).toArray, filters, Array(dir), confBroadcast)
 
           // Merges data values with partition values.
           mergeWithPartitionValues(
-            relation.schema,
-            columns.map(_.name).toArray,
-            partitionColNames,
+            requiredColumns,
+            requiredDataColumns,
+            partitionColumns,
             partitionValues,
-            toCatalystRDD(logicalRelation, needed, dataRows))
+            toCatalystRDD(logicalRelation, requiredDataColumns, dataRows))
         }
 
         val unionedRows =
@@ -188,52 +189,27 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     sparkPlan
   }
 
-  // TODO: refactor this thing. It is very complicated because it does projection internally.
-  // We should just put a project on top of this.
   private def mergeWithPartitionValues(
-      schema: StructType,
-      requiredColumns: Array[String],
-      partitionColumns: Array[String],
+      requiredColumns: Seq[Attribute],
+      dataColumns: Seq[Attribute],
+      partitionColumnSchema: StructType,
       partitionValues: InternalRow,
       dataRows: RDD[InternalRow]): RDD[InternalRow] = {
-    val nonPartitionColumns = requiredColumns.filterNot(partitionColumns.contains)
-
     // If output columns contain any partition column(s), we need to merge scanned data
     // columns and requested partition columns to form the final result.
-    if (!requiredColumns.sameElements(nonPartitionColumns)) {
-      val mergers = requiredColumns.zipWithIndex.map { case (name, index) =>
-        // To see whether the `index`-th column is a partition column...
-        val i = partitionColumns.indexOf(name)
-        if (i != -1) {
-          val dt = schema(partitionColumns(i)).dataType
-          // If yes, gets column value from partition values.
-          (mutableRow: MutableRow, dataRow: InternalRow, ordinal: Int) => {
-            mutableRow(ordinal) = partitionValues.get(i, dt)
-          }
-        } else {
-          // Otherwise, inherits the value from scanned data.
-          val i = nonPartitionColumns.indexOf(name)
-          val dt = schema(nonPartitionColumns(i)).dataType
-          (mutableRow: MutableRow, dataRow: InternalRow, ordinal: Int) => {
-            mutableRow(ordinal) = dataRow.get(i, dt)
-          }
-        }
+    if (requiredColumns != dataColumns) {
+      // Builds `AttributeReference`s for all partition columns so that we can use them to project
+      // required partition columns.  Note that if a partition column appears in `requiredColumns`,
+      // we should use the `AttributeReference` in `requiredColumns`.
+      val requiredColumnMap = requiredColumns.map(a => a.name -> a).toMap
+      val partitionColumns = partitionColumnSchema.toAttributes.map { a =>
+        requiredColumnMap.getOrElse(a.name, a)
       }
 
-      // Since we know for sure that this closure is serializable, we can avoid the overhead
-      // of cleaning a closure for each RDD by creating our own MapPartitionsRDD. Functionally
-      // this is equivalent to calling `dataRows.mapPartitions(mapPartitionsFunc)` (SPARK-7718).
       val mapPartitionsFunc = (_: TaskContext, _: Int, iterator: Iterator[InternalRow]) => {
-        val dataTypes = requiredColumns.map(schema(_).dataType)
-        val mutableRow = new SpecificMutableRow(dataTypes)
-        iterator.map { dataRow =>
-          var i = 0
-          while (i < mutableRow.numFields) {
-            mergers(i)(mutableRow, dataRow, i)
-            i += 1
-          }
-          mutableRow.asInstanceOf[InternalRow]
-        }
+        val projection = UnsafeProjection.create(requiredColumns, dataColumns ++ partitionColumns)
+        val mutableJoinedRow = new JoinedRow()
+        iterator.map(dataRow => projection(mutableJoinedRow(dataRow, partitionValues)))
       }
 
       // This is an internal RDD whose call site the user should not be concerned with
@@ -242,7 +218,6 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
       Utils.withDummyCallSite(dataRows.sparkContext) {
         new MapPartitionsRDD(dataRows, mapPartitionsFunc, preservesPartitioning = false)
       }
-
     } else {
       dataRows
     }

From 8f74aa639759f400120794355511327fa74905da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Baptiste=20Onofr=C3=A9?= <jbonofre@apache.org>
Date: Tue, 20 Oct 2015 08:45:39 +0100
Subject: [PATCH 294/896] [SPARK-10876] Display total uptime for completed
 applications
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Author: Jean-Baptiste Onofré <jbonofre@apache.org>

Closes #9059 from jbonofre/SPARK-10876.
---
 .../org/apache/spark/ui/jobs/AllJobsPage.scala | 18 +++++++++++-------
 .../spark/ui/jobs/JobProgressListener.scala    |  7 ++++++-
 2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala b/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
index 041cd55ea483..d467dd9e1f29 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/AllJobsPage.scala
@@ -265,6 +265,7 @@ private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") {
     val listener = parent.jobProgresslistener
     listener.synchronized {
       val startTime = listener.startTime
+      val endTime = listener.endTime
       val activeJobs = listener.activeJobs.values.toSeq
       val completedJobs = listener.completedJobs.reverse.toSeq
       val failedJobs = listener.failedJobs.reverse.toSeq
@@ -289,13 +290,16 @@ private[ui] class AllJobsPage(parent: JobsTab) extends WebUIPage("") {
       val summary: NodeSeq =
         <div>
           <ul class="unstyled">
-            {if (parent.sc.isDefined) {
-              // Total duration is not meaningful unless the UI is live
-              <li>
-                <strong>Total Uptime: </strong>
-                {UIUtils.formatDuration(System.currentTimeMillis() - startTime)}
-              </li>
-            }}
+            <li>
+              <strong>Total Uptime:</strong>
+              {
+                if (endTime < 0 && parent.sc.isDefined) {
+                  UIUtils.formatDuration(System.currentTimeMillis() - startTime)
+                } else if (endTime > 0) {
+                  UIUtils.formatDuration(endTime - startTime)
+                }
+              }
+            </li>
             <li>
               <strong>Scheduling Mode: </strong>
               {listener.schedulingMode.map(_.toString).getOrElse("Unknown")}
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
index 0c854f04890b..77d034fa5ba2 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
@@ -53,8 +53,9 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging {
   type PoolName = String
   type ExecutorId = String
 
-  // Applicatin:
+  // Application:
   @volatile var startTime = -1L
+  @volatile var endTime = -1L
 
   // Jobs:
   val activeJobs = new HashMap[JobId, JobUIData]
@@ -536,6 +537,10 @@ class JobProgressListener(conf: SparkConf) extends SparkListener with Logging {
     startTime = appStarted.time
   }
 
+  override def onApplicationEnd(appEnded: SparkListenerApplicationEnd) {
+    endTime = appEnded.time
+  }
+
   /**
    * For testing only. Wait until at least `numExecutors` executors are up, or throw
    * `TimeoutException` if the waiting time elapsed before `numExecutors` executors up.

From 60851bc7bf1fe702cde1d1548efd8016411e1682 Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Tue, 20 Oct 2015 08:54:34 +0100
Subject: [PATCH 295/896] [SPARK-11110][BUILD] Remove transient annotation for
 parameters.

`transient` annotations on class parameters (not case class parameters or vals) causes compilation errors during compilation with Scala 2.11.
I understand that transient *parameters* make no sense, however I don't quite understand why the 2.10 compiler accepted them.

Note: in case it is preferred to keep the annotations in case someone would in the future want to redefine them as vals, it would also be possible to just add `val` after the annotation, e.g. `class Foo(transient x: Int)` becomes `class Foo(transient private val x: Int)`.

I chose to remove the annotation as it also reduces needles clutter, however please feel free to tell me if you prefer the second option and I'll update the PR

Author: Jakob Odersky <jodersky@gmail.com>

Closes #9126 from jodersky/sbt-scala-2.11.
---
 .../main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala | 2 +-
 .../main/scala/org/apache/spark/sql/hive/HiveContext.scala  | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index a2b28c524df9..e01cf1a29e95 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -308,7 +308,7 @@ private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
   }
 }
 
-private[netty] class NettyRpcEndpointRef(@transient conf: SparkConf)
+private[netty] class NettyRpcEndpointRef(@transient private val conf: SparkConf)
   extends RpcEndpointRef(conf) with Serializable with Logging {
 
   @transient @volatile private var nettyEnv: NettyRpcEnv = _
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 4d8a3f728e6b..38c195bc7db0 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -89,9 +89,9 @@ private[hive] case class CurrentDatabase(ctx: HiveContext)
 class HiveContext private[hive](
     sc: SparkContext,
     cacheManager: CacheManager,
-    @transient listener: SQLListener,
-    @transient execHive: ClientWrapper,
-    @transient metaHive: ClientInterface,
+    listener: SQLListener,
+    @transient private val execHive: ClientWrapper,
+    @transient private val metaHive: ClientInterface,
     isRootContext: Boolean)
   extends SQLContext(sc, cacheManager, listener, isRootContext) with Logging {
   self =>

From 94139557c56cea318d4a4f82a4deaf72198f349a Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Tue, 20 Oct 2015 09:20:35 -0700
Subject: [PATCH 296/896] [SPARK-10463] [SQL] remove PromotePrecision during
 optimization

PromotePrecision is not necessary after HiveTypeCoercion done.

Jira:
https://issues.apache.org/jira/browse/SPARK-10463

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #8621 from adrian-wang/promoterm.
---
 .../apache/spark/sql/catalyst/optimizer/Optimizer.scala    | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 63602eaa8ccd..6557c7005d1e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -57,7 +57,7 @@ object DefaultOptimizer extends Optimizer {
       ConstantFolding,
       LikeSimplification,
       BooleanSimplification,
-      RemovePositive,
+      RemoveDispensable,
       SimplifyFilters,
       SimplifyCasts,
       SimplifyCaseConversionExpressions) ::
@@ -784,11 +784,12 @@ object SimplifyCasts extends Rule[LogicalPlan] {
 }
 
 /**
- * Removes [[UnaryPositive]] identify function
+ * Removes nodes that are not necessary.
  */
-object RemovePositive extends Rule[LogicalPlan] {
+object RemoveDispensable extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transformAllExpressions {
     case UnaryPositive(child) => child
+    case PromotePrecision(child) => child
   }
 }
 

From e18b571c3374ecbfc0b20a5064cb58d57a2a7d21 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Tue, 20 Oct 2015 10:52:49 -0700
Subject: [PATCH 297/896] [SPARK-10447][SPARK-3842][PYSPARK] upgrade pyspark to
 py4j0.9

Upgrade to Py4j0.9

Author: Holden Karau <holden@pigscanfly.ca>
Author: Holden Karau <holden@us.ibm.com>

Closes #8615 from holdenk/SPARK-10447-upgrade-pyspark-to-py4j0.9.
---
 LICENSE                                       |   2 +-
 bin/pyspark                                   |   2 +-
 bin/pyspark2.cmd                              |   2 +-
 core/pom.xml                                  |   2 +-
 .../apache/spark/api/python/PythonUtils.scala |   2 +-
 python/docs/Makefile                          |   2 +-
 python/lib/py4j-0.8.2.1-src.zip               | Bin 37562 -> 0 bytes
 python/lib/py4j-0.9-src.zip                   | Bin 0 -> 44846 bytes
 python/pyspark/streaming/context.py           |  54 +++---------------
 python/pyspark/streaming/flume.py             |   2 +-
 python/pyspark/streaming/kafka.py             |   2 +-
 python/pyspark/streaming/kinesis.py           |   2 +-
 python/pyspark/streaming/mqtt.py              |   2 +-
 python/pyspark/streaming/tests.py             |  18 ++++--
 sbin/spark-config.sh                          |   2 +-
 .../org/apache/spark/deploy/yarn/Client.scala |   4 +-
 .../spark/deploy/yarn/YarnClusterSuite.scala  |   2 +-
 17 files changed, 34 insertions(+), 66 deletions(-)
 delete mode 100644 python/lib/py4j-0.8.2.1-src.zip
 create mode 100644 python/lib/py4j-0.9-src.zip

diff --git a/LICENSE b/LICENSE
index dca03ab16de2..790476ece15b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -265,7 +265,7 @@ The text of each license is also included at licenses/LICENSE-[project].txt.
      (New BSD license) Protocol Buffer Java API (org.spark-project.protobuf:protobuf-java:2.4.1-shaded - http://code.google.com/p/protobuf)
      (The BSD License) Fortran to Java ARPACK (net.sourceforge.f2j:arpack_combined_all:0.1 - http://f2j.sourceforge.net)
      (The BSD License) xmlenc Library (xmlenc:xmlenc:0.52 - http://xmlenc.sourceforge.net)
-     (The New BSD License) Py4J (net.sf.py4j:py4j:0.8.2.1 - http://py4j.sourceforge.net/)
+     (The New BSD License) Py4J (net.sf.py4j:py4j:0.9 - http://py4j.sourceforge.net/)
      (Two-clause BSD-style license) JUnit-Interface (com.novocode:junit-interface:0.10 - http://github.com/szeiger/junit-interface/)
      (BSD licence) sbt and sbt-launch-lib.bash
      (BSD 3 Clause) d3.min.js (https://github.com/mbostock/d3/blob/master/LICENSE)
diff --git a/bin/pyspark b/bin/pyspark
index 8f2a3b5a7717..18012ee4a0b4 100755
--- a/bin/pyspark
+++ b/bin/pyspark
@@ -65,7 +65,7 @@ export PYSPARK_PYTHON
 
 # Add the PySpark classes to the Python path:
 export PYTHONPATH="$SPARK_HOME/python/:$PYTHONPATH"
-export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.8.2.1-src.zip:$PYTHONPATH"
+export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.9-src.zip:$PYTHONPATH"
 
 # Load the PySpark shell.py script when ./pyspark is used interactively:
 export OLD_PYTHONSTARTUP="$PYTHONSTARTUP"
diff --git a/bin/pyspark2.cmd b/bin/pyspark2.cmd
index 3c6169983e76..a97d884f0bf3 100644
--- a/bin/pyspark2.cmd
+++ b/bin/pyspark2.cmd
@@ -30,7 +30,7 @@ if "x%PYSPARK_DRIVER_PYTHON%"=="x" (
 )
 
 set PYTHONPATH=%SPARK_HOME%\python;%PYTHONPATH%
-set PYTHONPATH=%SPARK_HOME%\python\lib\py4j-0.8.2.1-src.zip;%PYTHONPATH%
+set PYTHONPATH=%SPARK_HOME%\python\lib\py4j-0.9-src.zip;%PYTHONPATH%
 
 set OLD_PYTHONSTARTUP=%PYTHONSTARTUP%
 set PYTHONSTARTUP=%SPARK_HOME%\python\pyspark\shell.py
diff --git a/core/pom.xml b/core/pom.xml
index fdcb6a7902bb..319a50049a82 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -350,7 +350,7 @@
     <dependency>
       <groupId>net.sf.py4j</groupId>
       <artifactId>py4j</artifactId>
-      <version>0.8.2.1</version>
+      <version>0.9</version>
     </dependency>
     <dependency>
       <groupId>org.apache.spark</groupId>
diff --git a/core/src/main/scala/org/apache/spark/api/python/PythonUtils.scala b/core/src/main/scala/org/apache/spark/api/python/PythonUtils.scala
index 31e534f160ee..292ac4cfc35b 100644
--- a/core/src/main/scala/org/apache/spark/api/python/PythonUtils.scala
+++ b/core/src/main/scala/org/apache/spark/api/python/PythonUtils.scala
@@ -32,7 +32,7 @@ private[spark] object PythonUtils {
     val pythonPath = new ArrayBuffer[String]
     for (sparkHome <- sys.env.get("SPARK_HOME")) {
       pythonPath += Seq(sparkHome, "python", "lib", "pyspark.zip").mkString(File.separator)
-      pythonPath += Seq(sparkHome, "python", "lib", "py4j-0.8.2.1-src.zip").mkString(File.separator)
+      pythonPath += Seq(sparkHome, "python", "lib", "py4j-0.9-src.zip").mkString(File.separator)
     }
     pythonPath ++= SparkContext.jarOfObject(this)
     pythonPath.mkString(File.pathSeparator)
diff --git a/python/docs/Makefile b/python/docs/Makefile
index 8a1324eecd32..4cec74f057fb 100644
--- a/python/docs/Makefile
+++ b/python/docs/Makefile
@@ -7,7 +7,7 @@ SPHINXBUILD   = sphinx-build
 PAPER         =
 BUILDDIR      = _build
 
-export PYTHONPATH=$(realpath ..):$(realpath ../lib/py4j-0.8.2.1-src.zip)
+export PYTHONPATH=$(realpath ..):$(realpath ../lib/py4j-0.9-src.zip)
 
 # User-friendly check for sphinx-build
 ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
diff --git a/python/lib/py4j-0.8.2.1-src.zip b/python/lib/py4j-0.8.2.1-src.zip
deleted file mode 100644
index 5203b84d9119ea5415114939624411ba7d3daa8a..0000000000000000000000000000000000000000
GIT binary patch
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zg0i&w#L^H!Da4Els~=#Y2&1DJs5F+~jr=u>0I96pDnGv>mZAX`lUvcOBY8+Ov<QFl
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zuo$o*5(9^%Ehr3MRRm75l)Fq0igYRmrRNJJ1dSOHtafE~HwEJ5FczazlPEN&0862|
zo3hLnA7L=2PR8L83aVMDD#HBZ8nsadTVk$XNH34xTiH{88?=zzQ?Py+gf=MuC=>=M
zz5U_G?%rxzE(^ID0Vv~bKbel1H}zn14uyl6fz#(Wm+{oYcS;B2xiUUkN=e^s@-1Tr
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z_VEADKzbT(@@v_xo@)PWoTpJI|5W<_5T3ft|4QJKeNy_Lg#YC||9gn1_Ts-HD&(Ia
z{?2Ut_YhAVpnpZ!Dm_8`?Fa5pKj_~hJ@rWbmDHg8g!H$L$-l>VYMuKl14iu$<7c1z
zw~_AeQJ(q&{z{3|`ESZom%!g6JhfK)l>pZNZ^9F!wci6gb-wx)U}N|f;Aa#4>Vx%r
n%1@t4epRN=`AhlVGu}VmBw=9xm<;~-Vle!83zshV<K6!NXx=E-

literal 0
HcmV?d00001

diff --git a/python/pyspark/streaming/context.py b/python/pyspark/streaming/context.py
index a8c9ffc235b9..975c75473214 100644
--- a/python/pyspark/streaming/context.py
+++ b/python/pyspark/streaming/context.py
@@ -32,48 +32,6 @@
 __all__ = ["StreamingContext"]
 
 
-def _daemonize_callback_server():
-    """
-    Hack Py4J to daemonize callback server
-
-    The thread of callback server has daemon=False, it will block the driver
-    from exiting if it's not shutdown. The following code replace `start()`
-    of CallbackServer with a new version, which set daemon=True for this
-    thread.
-
-    Also, it will update the port number (0) with real port
-    """
-    # TODO: create a patch for Py4J
-    import socket
-    import py4j.java_gateway
-    logger = py4j.java_gateway.logger
-    from py4j.java_gateway import Py4JNetworkError
-    from threading import Thread
-
-    def start(self):
-        """Starts the CallbackServer. This method should be called by the
-        client instead of run()."""
-        self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,
-                                      1)
-        try:
-            self.server_socket.bind((self.address, self.port))
-            if not self.port:
-                # update port with real port
-                self.port = self.server_socket.getsockname()[1]
-        except Exception as e:
-            msg = 'An error occurred while trying to start the callback server: %s' % e
-            logger.exception(msg)
-            raise Py4JNetworkError(msg)
-
-        # Maybe thread needs to be cleanup up?
-        self.thread = Thread(target=self.run)
-        self.thread.daemon = True
-        self.thread.start()
-
-    py4j.java_gateway.CallbackServer.start = start
-
-
 class StreamingContext(object):
     """
     Main entry point for Spark Streaming functionality. A StreamingContext
@@ -123,10 +81,14 @@ def _ensure_initialized(cls):
 
         # start callback server
         # getattr will fallback to JVM, so we cannot test by hasattr()
-        if "_callback_server" not in gw.__dict__:
-            _daemonize_callback_server()
-            # use random port
-            gw._start_callback_server(0)
+        if "_callback_server" not in gw.__dict__ or gw._callback_server is None:
+            gw.callback_server_parameters.eager_load = True
+            gw.callback_server_parameters.daemonize = True
+            gw.callback_server_parameters.daemonize_connections = True
+            gw.callback_server_parameters.port = 0
+            gw.start_callback_server(gw.callback_server_parameters)
+            cbport = gw._callback_server.server_socket.getsockname()[1]
+            gw._callback_server.port = cbport
             # gateway with real port
             gw._python_proxy_port = gw._callback_server.port
             # get the GatewayServer object in JVM by ID
diff --git a/python/pyspark/streaming/flume.py b/python/pyspark/streaming/flume.py
index c0cdc50d8d42..b3d190536592 100644
--- a/python/pyspark/streaming/flume.py
+++ b/python/pyspark/streaming/flume.py
@@ -20,7 +20,7 @@
     from io import BytesIO
 else:
     from StringIO import StringIO
-from py4j.java_gateway import Py4JJavaError
+from py4j.protocol import Py4JJavaError
 
 from pyspark.storagelevel import StorageLevel
 from pyspark.serializers import PairDeserializer, NoOpSerializer, UTF8Deserializer, read_int
diff --git a/python/pyspark/streaming/kafka.py b/python/pyspark/streaming/kafka.py
index 8a814c64c042..b35bbaf404cc 100644
--- a/python/pyspark/streaming/kafka.py
+++ b/python/pyspark/streaming/kafka.py
@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-from py4j.java_gateway import Py4JJavaError
+from py4j.protocol import Py4JJavaError
 
 from pyspark.rdd import RDD
 from pyspark.storagelevel import StorageLevel
diff --git a/python/pyspark/streaming/kinesis.py b/python/pyspark/streaming/kinesis.py
index 34be5880e170..af72c3d6903f 100644
--- a/python/pyspark/streaming/kinesis.py
+++ b/python/pyspark/streaming/kinesis.py
@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-from py4j.java_gateway import Py4JJavaError
+from py4j.protocol import Py4JJavaError
 
 from pyspark.serializers import PairDeserializer, NoOpSerializer
 from pyspark.storagelevel import StorageLevel
diff --git a/python/pyspark/streaming/mqtt.py b/python/pyspark/streaming/mqtt.py
index fa83006c36db..1ce4093196e6 100644
--- a/python/pyspark/streaming/mqtt.py
+++ b/python/pyspark/streaming/mqtt.py
@@ -15,7 +15,7 @@
 # limitations under the License.
 #
 
-from py4j.java_gateway import Py4JJavaError
+from py4j.protocol import Py4JJavaError
 
 from pyspark.storagelevel import StorageLevel
 from pyspark.serializers import UTF8Deserializer
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index e4e56fff3b3f..49634252fd46 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -61,9 +61,12 @@ def setUpClass(cls):
     def tearDownClass(cls):
         cls.sc.stop()
         # Clean up in the JVM just in case there has been some issues in Python API
-        jSparkContextOption = SparkContext._jvm.SparkContext.get()
-        if jSparkContextOption.nonEmpty():
-            jSparkContextOption.get().stop()
+        try:
+            jSparkContextOption = SparkContext._jvm.SparkContext.get()
+            if jSparkContextOption.nonEmpty():
+                jSparkContextOption.get().stop()
+        except:
+            pass
 
     def setUp(self):
         self.ssc = StreamingContext(self.sc, self.duration)
@@ -72,9 +75,12 @@ def tearDown(self):
         if self.ssc is not None:
             self.ssc.stop(False)
         # Clean up in the JVM just in case there has been some issues in Python API
-        jStreamingContextOption = StreamingContext._jvm.SparkContext.getActive()
-        if jStreamingContextOption.nonEmpty():
-            jStreamingContextOption.get().stop(False)
+        try:
+            jStreamingContextOption = StreamingContext._jvm.SparkContext.getActive()
+            if jStreamingContextOption.nonEmpty():
+                jStreamingContextOption.get().stop(False)
+        except:
+            pass
 
     def wait_for(self, result, n):
         start_time = time.time()
diff --git a/sbin/spark-config.sh b/sbin/spark-config.sh
index b0361d72d3f2..e6bf544c1479 100755
--- a/sbin/spark-config.sh
+++ b/sbin/spark-config.sh
@@ -36,4 +36,4 @@ export SPARK_HOME="${SPARK_PREFIX}"
 export SPARK_CONF_DIR="${SPARK_CONF_DIR:-"$SPARK_HOME/conf"}"
 # Add the PySpark classes to the PYTHONPATH:
 export PYTHONPATH="$SPARK_HOME/python:$PYTHONPATH"
-export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.8.2.1-src.zip:$PYTHONPATH"
+export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.9-src.zip:$PYTHONPATH"
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 08aecfa7f6fe..754215db2a90 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -1008,9 +1008,9 @@ private[spark] class Client(
         val pyArchivesFile = new File(pyLibPath, "pyspark.zip")
         require(pyArchivesFile.exists(),
           "pyspark.zip not found; cannot run pyspark application in YARN mode.")
-        val py4jFile = new File(pyLibPath, "py4j-0.8.2.1-src.zip")
+        val py4jFile = new File(pyLibPath, "py4j-0.9-src.zip")
         require(py4jFile.exists(),
-          "py4j-0.8.2.1-src.zip not found; cannot run pyspark application in YARN mode.")
+          "py4j-0.9-src.zip not found; cannot run pyspark application in YARN mode.")
         Seq(pyArchivesFile.getAbsolutePath(), py4jFile.getAbsolutePath())
       }
   }
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
index d1cd0c89b5d3..6db012a77a93 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnClusterSuite.scala
@@ -153,7 +153,7 @@ class YarnClusterSuite extends BaseYarnClusterSuite {
     // needed locations.
     val sparkHome = sys.props("spark.test.home");
     val pythonPath = Seq(
-        s"$sparkHome/python/lib/py4j-0.8.2.1-src.zip",
+        s"$sparkHome/python/lib/py4j-0.9-src.zip",
         s"$sparkHome/python")
     val extraEnv = Map(
       "PYSPARK_ARCHIVES_PATH" -> pythonPath.map("local:" + _).mkString(File.pathSeparator),

From 2f6dd634c169a34811738a3c230cce4462612748 Mon Sep 17 00:00:00 2001
From: vundela <vsr@cloudera.com>
Date: Tue, 20 Oct 2015 11:12:28 -0700
Subject: [PATCH 298/896] [SPARK-11105] [YARN] Distribute log4j.properties to
 executors

Currently log4j.properties file is not uploaded to executor's which is leading them to use the default values. This fix will make sure that file is always uploaded to distributed cache so that executor will use the latest settings.

If user specifies log configurations through --files then executors will be picking configs from --files instead of $SPARK_CONF_DIR/log4j.properties

Author: vundela <vsr@cloudera.com>
Author: Srinivasa Reddy Vundela <vsr@cloudera.com>

Closes #9118 from vundela/master.
---
 docs/running-on-yarn.md                             |  5 ++++-
 .../scala/org/apache/spark/deploy/yarn/Client.scala | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index 677c0000440a..db6bfa69ee0f 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -81,7 +81,7 @@ all environment variables used for launching each container. This process is use
 classpath problems in particular. (Note that enabling this requires admin privileges on cluster
 settings and a restart of all node managers. Thus, this is not applicable to hosted clusters).
 
-To use a custom log4j configuration for the application master or executors, there are two options:
+To use a custom log4j configuration for the application master or executors, here are the options:
 
 - upload a custom `log4j.properties` using `spark-submit`, by adding it to the `--files` list of files
   to be uploaded with the application.
@@ -89,6 +89,9 @@ To use a custom log4j configuration for the application master or executors, the
   (for the driver) or `spark.executor.extraJavaOptions` (for executors). Note that if using a file,
   the `file:` protocol should be explicitly provided, and the file needs to exist locally on all
   the nodes.
+- update the `$SPARK_CONF_DIR/log4j.properties` file and it will be automatically uploaded along
+  with the other configurations. Note that other 2 options has higher priority than this option if
+  multiple options are specified.
 
 Note that for the first option, both executors and the application master will share the same
 log4j configuration, which may cause issues when they run on the same node (e.g. trying to write
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 754215db2a90..4954b6180902 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -497,6 +497,19 @@ private[spark] class Client(
    */
   private def createConfArchive(): File = {
     val hadoopConfFiles = new HashMap[String, File]()
+
+    // Uploading $SPARK_CONF_DIR/log4j.properties file to the distributed cache to make sure that
+    // the executors will use the latest configurations instead of the default values. This is
+    // required when user changes log4j.properties directly to set the log configurations. If
+    // configuration file is provided through --files then executors will be taking configurations
+    // from --files instead of $SPARK_CONF_DIR/log4j.properties.
+    val log4jFileName = "log4j.properties"
+    Option(Utils.getContextOrSparkClassLoader.getResource(log4jFileName)).foreach { url =>
+      if (url.getProtocol == "file") {
+        hadoopConfFiles(log4jFileName) = new File(url.getPath)
+      }
+    }
+
     Seq("HADOOP_CONF_DIR", "YARN_CONF_DIR").foreach { envKey =>
       sys.env.get(envKey).foreach { path =>
         val dir = new File(path)

From 478c7ce8628c05ebce2972e631d76317accebe9c Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@outlook.com>
Date: Tue, 20 Oct 2015 13:36:03 -0700
Subject: [PATCH 299/896] [SPARK-6740] [SQL] correctly parse NOT operator with
 comparison operations

We can't parse `NOT` operator with comparison operations like `SELECT NOT TRUE > TRUE`, this PR fixed it.

Takes over https://github.com/apache/spark/pull/6326.

Author: Wenchen Fan <cloud0fan@outlook.com>

Closes #8617 from cloud-fan/not.
---
 .../apache/spark/sql/catalyst/SqlParser.scala |  6 ++++--
 .../spark/sql/catalyst/SqlParserSuite.scala   | 21 ++++++++++++++-----
 .../spark/sql/catalyst/plans/PlanTest.scala   |  2 +-
 3 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 2595e1f90c83..08ca325b2177 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -218,7 +218,10 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     andExpression * (OR ^^^ { (e1: Expression, e2: Expression) => Or(e1, e2) })
 
   protected lazy val andExpression: Parser[Expression] =
-    comparisonExpression * (AND ^^^ { (e1: Expression, e2: Expression) => And(e1, e2) })
+    notExpression * (AND ^^^ { (e1: Expression, e2: Expression) => And(e1, e2) })
+
+  protected lazy val notExpression: Parser[Expression] =
+    NOT.? ~ comparisonExpression ^^ { case maybeNot ~ e => maybeNot.map(_ => Not(e)).getOrElse(e) }
 
   protected lazy val comparisonExpression: Parser[Expression] =
     ( termExpression ~ ("="  ~> termExpression) ^^ { case e1 ~ e2 => EqualTo(e1, e2) }
@@ -246,7 +249,6 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
       }
     | termExpression <~ IS ~ NULL ^^ { case e => IsNull(e) }
     | termExpression <~ IS ~ NOT ~ NULL ^^ { case e => IsNotNull(e) }
-    | NOT ~> termExpression ^^ {e => Not(e)}
     | termExpression
     )
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
index b93a3abc6ebd..79b4846cb954 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
@@ -17,10 +17,10 @@
 
 package org.apache.spark.sql.catalyst
 
-import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
-import org.apache.spark.sql.catalyst.plans.logical.Command
+import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
+import org.apache.spark.sql.catalyst.expressions.{Literal, GreaterThan, Not, Attribute}
+import org.apache.spark.sql.catalyst.plans.PlanTest
+import org.apache.spark.sql.catalyst.plans.logical.{OneRowRelation, Project, LogicalPlan, Command}
 
 private[sql] case class TestCommand(cmd: String) extends LogicalPlan with Command {
   override def output: Seq[Attribute] = Seq.empty
@@ -49,7 +49,7 @@ private[sql] class CaseInsensitiveTestParser extends AbstractSparkSQLParser {
     }
 }
 
-class SqlParserSuite extends SparkFunSuite {
+class SqlParserSuite extends PlanTest {
 
   test("test long keyword") {
     val parser = new SuperLongKeywordTestParser
@@ -63,4 +63,15 @@ class SqlParserSuite extends SparkFunSuite {
     assert(TestCommand("NotRealCommand") === parser.parse("execute NotRealCommand"))
     assert(TestCommand("NotRealCommand") === parser.parse("exEcute NotRealCommand"))
   }
+
+  test("test NOT operator with comparison operations") {
+    val parsed = SqlParser.parse("SELECT NOT TRUE > TRUE")
+    val expected = Project(
+      UnresolvedAlias(
+        Not(
+          GreaterThan(Literal(true), Literal(true)))
+      ) :: Nil,
+      OneRowRelation)
+    comparePlans(parsed, expected)
+  }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/plans/PlanTest.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/plans/PlanTest.scala
index f76a903dcc9c..2efee1fc5470 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/plans/PlanTest.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/plans/PlanTest.scala
@@ -25,7 +25,7 @@ import org.apache.spark.sql.catalyst.util._
 /**
  * Provides helper methods for comparing plans.
  */
-class PlanTest extends SparkFunSuite {
+abstract class PlanTest extends SparkFunSuite {
   /**
    * Since attribute references are given globally unique ids during analysis,
    * we must normalize them to check if two different queries are identical.

From 67d468f8d9172569ec9846edc6432240547696dd Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 20 Oct 2015 13:40:24 -0700
Subject: [PATCH 300/896] [SPARK-11111] [SQL] fast null-safe join

Currently, we use CartesianProduct for join with null-safe-equal condition.
```
scala> sqlContext.sql("select * from t a join t b on (a.i <=> b.i)").explain
== Physical Plan ==
TungstenProject [i#2,j#3,i#7,j#8]
 Filter (i#2 <=> i#7)
  CartesianProduct
   LocalTableScan [i#2,j#3], [[1,1]]
   LocalTableScan [i#7,j#8], [[1,1]]
```
Actually, we can have an equal-join condition as  `coalesce(i, default) = coalesce(b.i, default)`, then an partitioned join algorithm could be used.

After this PR, the plan will become:
```
>>> sqlContext.sql("select * from a join b ON a.id <=> b.id").explain()
TungstenProject [id#0L,id#1L]
 Filter (id#0L <=> id#1L)
  SortMergeJoin [coalesce(id#0L,0)], [coalesce(id#1L,0)]
   TungstenSort [coalesce(id#0L,0) ASC], false, 0
    TungstenExchange hashpartitioning(coalesce(id#0L,0),200)
     ConvertToUnsafe
      Scan PhysicalRDD[id#0L]
   TungstenSort [coalesce(id#1L,0) ASC], false, 0
    TungstenExchange hashpartitioning(coalesce(id#1L,0),200)
     ConvertToUnsafe
      Scan PhysicalRDD[id#1L]
```

Author: Davies Liu <davies@databricks.com>

Closes #9120 from davies/null_safe.
---
 .../sql/catalyst/expressions/literals.scala   | 29 +++++++++++++--
 .../sql/catalyst/planning/patterns.scala      | 35 ++++++++++++-------
 .../expressions/LiteralExpressionSuite.scala  | 28 ++++++++++++++-
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 14 ++++++++
 .../sql/execution/joins/InnerJoinSuite.scala  | 14 ++++++++
 5 files changed, 105 insertions(+), 15 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
index 51be819e9d6f..455fa2427c26 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
@@ -19,8 +19,7 @@ package org.apache.spark.sql.catalyst.expressions
 
 import java.sql.{Date, Timestamp}
 
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.CatalystTypeConverters
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.codegen._
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.types._
@@ -52,6 +51,32 @@ object Literal {
   def create(v: Any, dataType: DataType): Literal = {
     Literal(CatalystTypeConverters.convertToCatalyst(v), dataType)
   }
+
+  /**
+   * Create a literal with default value for given DataType
+   */
+  def default(dataType: DataType): Literal = dataType match {
+    case NullType => create(null, NullType)
+    case BooleanType => Literal(false)
+    case ByteType => Literal(0.toByte)
+    case ShortType => Literal(0.toShort)
+    case IntegerType => Literal(0)
+    case LongType => Literal(0L)
+    case FloatType => Literal(0.0f)
+    case DoubleType => Literal(0.0)
+    case dt: DecimalType => Literal(Decimal(0, dt.precision, dt.scale))
+    case DateType => create(0, DateType)
+    case TimestampType => create(0L, TimestampType)
+    case StringType => Literal("")
+    case BinaryType => Literal("".getBytes)
+    case CalendarIntervalType => Literal(new CalendarInterval(0, 0))
+    case arr: ArrayType => create(Array(), arr)
+    case map: MapType => create(Map(), map)
+    case struct: StructType =>
+      create(InternalRow.fromSeq(struct.fields.map(f => default(f.dataType).value)), struct)
+    case other =>
+      throw new RuntimeException(s"no default for type $dataType")
+  }
 }
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
index 53537799517c..3b975b904a33 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
@@ -18,10 +18,10 @@
 package org.apache.spark.sql.catalyst.planning
 
 import org.apache.spark.Logging
-import org.apache.spark.sql.catalyst.trees.TreeNodeRef
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.catalyst.trees.TreeNodeRef
 
 /**
  * A pattern that matches any number of project or filter operations on top of another relational
@@ -160,6 +160,9 @@ object PartialAggregation {
 
 /**
  * A pattern that finds joins with equality conditions that can be evaluated using equi-join.
+ *
+ * Null-safe equality will be transformed into equality as joining key (replace null with default
+ * value).
  */
 object ExtractEquiJoinKeys extends Logging with PredicateHelper {
   /** (joinType, leftKeys, rightKeys, condition, leftChild, rightChild) */
@@ -171,17 +174,25 @@ object ExtractEquiJoinKeys extends Logging with PredicateHelper {
       logDebug(s"Considering join on: $condition")
       // Find equi-join predicates that can be evaluated before the join, and thus can be used
       // as join keys.
-      val (joinPredicates, otherPredicates) =
-        condition.map(splitConjunctivePredicates).getOrElse(Nil).partition {
-          case EqualTo(l, r) =>
-            (canEvaluate(l, left) && canEvaluate(r, right)) ||
-            (canEvaluate(l, right) && canEvaluate(r, left))
-          case _ => false
-        }
-
-      val joinKeys = joinPredicates.map {
-        case EqualTo(l, r) if canEvaluate(l, left) && canEvaluate(r, right) => (l, r)
-        case EqualTo(l, r) if canEvaluate(l, right) && canEvaluate(r, left) => (r, l)
+      val predicates = condition.map(splitConjunctivePredicates).getOrElse(Nil)
+      val joinKeys = predicates.flatMap {
+        case EqualTo(l, r) if canEvaluate(l, left) && canEvaluate(r, right) => Some((l, r))
+        case EqualTo(l, r) if canEvaluate(l, right) && canEvaluate(r, left) => Some((r, l))
+        // Replace null with default value for joining key, then those rows with null in it could
+        // be joined together
+        case EqualNullSafe(l, r) if canEvaluate(l, left) && canEvaluate(r, right) =>
+          Some((Coalesce(Seq(l, Literal.default(l.dataType))),
+            Coalesce(Seq(r, Literal.default(r.dataType)))))
+        case EqualNullSafe(l, r) if canEvaluate(l, right) && canEvaluate(r, left) =>
+          Some((Coalesce(Seq(r, Literal.default(r.dataType))),
+            Coalesce(Seq(l, Literal.default(l.dataType)))))
+        case other => None
+      }
+      val otherPredicates = predicates.filterNot {
+        case EqualTo(l, r) =>
+          canEvaluate(l, left) && canEvaluate(r, right) ||
+            canEvaluate(l, right) && canEvaluate(r, left)
+        case other => false
       }
 
       if (joinKeys.nonEmpty) {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralExpressionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralExpressionSuite.scala
index 015eb1897fb8..7b85286c4dc8 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralExpressionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/LiteralExpressionSuite.scala
@@ -18,7 +18,10 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.CalendarInterval
 
 
 class LiteralExpressionSuite extends SparkFunSuite with ExpressionEvalHelper {
@@ -30,15 +33,38 @@ class LiteralExpressionSuite extends SparkFunSuite with ExpressionEvalHelper {
     checkEvaluation(Literal.create(null, IntegerType), null)
     checkEvaluation(Literal.create(null, LongType), null)
     checkEvaluation(Literal.create(null, FloatType), null)
-    checkEvaluation(Literal.create(null, LongType), null)
+    checkEvaluation(Literal.create(null, DoubleType), null)
     checkEvaluation(Literal.create(null, StringType), null)
     checkEvaluation(Literal.create(null, BinaryType), null)
     checkEvaluation(Literal.create(null, DecimalType.USER_DEFAULT), null)
+    checkEvaluation(Literal.create(null, DateType), null)
+    checkEvaluation(Literal.create(null, TimestampType), null)
+    checkEvaluation(Literal.create(null, CalendarIntervalType), null)
     checkEvaluation(Literal.create(null, ArrayType(ByteType, true)), null)
     checkEvaluation(Literal.create(null, MapType(StringType, IntegerType)), null)
     checkEvaluation(Literal.create(null, StructType(Seq.empty)), null)
   }
 
+  test("default") {
+    checkEvaluation(Literal.default(BooleanType), false)
+    checkEvaluation(Literal.default(ByteType), 0.toByte)
+    checkEvaluation(Literal.default(ShortType), 0.toShort)
+    checkEvaluation(Literal.default(IntegerType), 0)
+    checkEvaluation(Literal.default(LongType), 0L)
+    checkEvaluation(Literal.default(FloatType), 0.0f)
+    checkEvaluation(Literal.default(DoubleType), 0.0)
+    checkEvaluation(Literal.default(StringType), "")
+    checkEvaluation(Literal.default(BinaryType), "".getBytes)
+    checkEvaluation(Literal.default(DecimalType.USER_DEFAULT), Decimal(0))
+    checkEvaluation(Literal.default(DecimalType.SYSTEM_DEFAULT), Decimal(0))
+    checkEvaluation(Literal.default(DateType), DateTimeUtils.toJavaDate(0))
+    checkEvaluation(Literal.default(TimestampType), DateTimeUtils.toJavaTimestamp(0L))
+    checkEvaluation(Literal.default(CalendarIntervalType), new CalendarInterval(0, 0L))
+    checkEvaluation(Literal.default(ArrayType(StringType)), Array())
+    checkEvaluation(Literal.default(MapType(IntegerType, StringType)), Map())
+    checkEvaluation(Literal.default(StructType(StructField("a", StringType) :: Nil)), Row(""))
+  }
+
   test("boolean literals") {
     checkEvaluation(Literal(true), true)
     checkEvaluation(Literal(false), false)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 636591630e13..a35a7f41dd66 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -25,6 +25,7 @@ import org.apache.spark.sql.catalyst.DefaultParserDialect
 import org.apache.spark.sql.catalyst.analysis.FunctionRegistry
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.execution.aggregate
+import org.apache.spark.sql.execution.joins.{SortMergeJoin, CartesianProduct}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SQLTestData._
 import org.apache.spark.sql.test.{SharedSQLContext, TestSQLContext}
@@ -850,6 +851,19 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       Row(null, null, 6, "F") :: Nil)
   }
 
+  test("SPARK-11111 null-safe join should not use cartesian product") {
+    val df = sql("select count(*) from testData a join testData b on (a.key <=> b.key)")
+    val cp = df.queryExecution.executedPlan.collect {
+      case cp: CartesianProduct => cp
+    }
+    assert(cp.isEmpty, "should not use CartesianProduct for null-safe join")
+    val smj = df.queryExecution.executedPlan.collect {
+      case smj: SortMergeJoin => smj
+    }
+    assert(smj.size > 0, "should use SortMergeJoin")
+    checkAnswer(df, Row(100) :: Nil)
+  }
+
   test("SPARK-3349 partitioning after limit") {
     sql("SELECT DISTINCT n FROM lowerCaseData ORDER BY n DESC")
       .limit(2)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
index 4174ee055021..da58e96f3e6f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
@@ -212,4 +212,18 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
     )
   }
 
+  {
+    lazy val left = Seq((1, Some(0)), (2, None)).toDF("a", "b")
+    lazy val right = Seq((1, Some(0)), (2, None)).toDF("a", "b")
+    testInnerJoin(
+      "inner join, null safe",
+      left,
+      right,
+      () => (left.col("b") <=> right.col("b")).expr,
+      Seq(
+        (1, 0, 1, 0),
+        (2, null, 2, null)
+      )
+    )
+  }
 }

From 06e6b765d0c747b773d7f3be28ddb0543c955a1f Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 20 Oct 2015 14:01:53 -0700
Subject: [PATCH 301/896] [SPARK-11149] [SQL] Improve cache performance for
 primitive types

This PR improve the performance by:

1) Generate an Iterator that take Iterator[CachedBatch] as input, and call accessors (unroll the loop for columns), avoid the expensive Iterator.flatMap.

2) Use Unsafe.getInt/getLong/getFloat/getDouble instead of ByteBuffer.getInt/getLong/getFloat/getDouble, the later one actually read byte by byte.

3) Remove the unnecessary copy() in Coalesce(), which is not related to memory cache, found during benchmark.

The following benchmark showed that we can speedup the columnar cache of int by 2x.

```
path = '/opt/tpcds/store_sales/'
int_cols = ['ss_sold_date_sk', 'ss_sold_time_sk', 'ss_item_sk','ss_customer_sk']
df = sqlContext.read.parquet(path).select(int_cols).cache()
df.count()

t = time.time()
print df.select("*")._jdf.queryExecution().toRdd().count()
print time.time() - t
```

Author: Davies Liu <davies@databricks.com>

Closes #9145 from davies/byte_buffer.
---
 .../expressions/codegen/CodeFormatter.scala   |   3 +
 .../expressions/codegen/CodeGenerator.scala   |  10 +-
 .../codegen/CodeFormatterSuite.scala          |  66 ++++----
 .../spark/sql/columnar/ColumnType.scala       |  52 ++++--
 .../sql/columnar/GenerateColumnAccessor.scala | 149 ++++++++++++++++++
 .../columnar/InMemoryColumnarTableScan.scala  |  83 ++++------
 .../sql/columnar/NullableColumnAccessor.scala |   6 +-
 .../compression/compressionSchemes.scala      |  16 +-
 .../spark/sql/execution/basicOperators.scala  |   2 +-
 9 files changed, 265 insertions(+), 122 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatter.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatter.scala
index c98182c96b16..9b8b6382d753 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatter.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatter.scala
@@ -32,6 +32,7 @@ private class CodeFormatter {
   private var indentLevel = 0
   private val indentSize = 2
   private var indentString = ""
+  private var currentLine = 1
 
   private def addLine(line: String): Unit = {
     val indentChange =
@@ -44,11 +45,13 @@ private class CodeFormatter {
     } else {
       indentString
     }
+    code.append(f"/* ${currentLine}%03d */ ")
     code.append(thisLineIndent)
     code.append(line)
     code.append("\n")
     indentLevel = newIndentLevel
     indentString = " " * (indentSize * newIndentLevel)
+    currentLine += 1
   }
 
   private def addLines(code: String): CodeFormatter = {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 7544d27e3dc1..a4ec5085fa15 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -391,26 +391,24 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
       classOf[ArrayData].getName,
       classOf[UnsafeArrayData].getName,
       classOf[MapData].getName,
-      classOf[UnsafeMapData].getName
+      classOf[UnsafeMapData].getName,
+      classOf[MutableRow].getName
     ))
     evaluator.setExtendedClass(classOf[GeneratedClass])
 
     def formatted = CodeFormatter.format(code)
-    def withLineNums = formatted.split("\n").zipWithIndex.map {
-      case (l, n) => f"${n + 1}%03d $l"
-    }.mkString("\n")
 
     logDebug({
       // Only add extra debugging info to byte code when we are going to print the source code.
       evaluator.setDebuggingInformation(true, true, false)
-      withLineNums
+      formatted
     })
 
     try {
       evaluator.cook("generated.java", code)
     } catch {
       case e: Exception =>
-        val msg = s"failed to compile: $e\n$withLineNums"
+        val msg = s"failed to compile: $e\n$formatted"
         logError(msg, e)
         throw new Exception(msg, e)
     }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatterSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatterSuite.scala
index 46daa3eb8bf8..9da1068e9ca1 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatterSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeFormatterSuite.scala
@@ -29,78 +29,68 @@ class CodeFormatterSuite extends SparkFunSuite {
   }
 
   testCase("basic example") {
-    """
-      |class A {
+    """class A {
       |blahblah;
-      |}
-    """.stripMargin
+      |}""".stripMargin
   }{
     """
-      |class A {
-      |  blahblah;
-      |}
+      |/* 001 */ class A {
+      |/* 002 */   blahblah;
+      |/* 003 */ }
     """.stripMargin
   }
 
   testCase("nested example") {
-    """
-      |class A {
+    """class A {
       | if (c) {
       |duh;
       |}
-      |}
-    """.stripMargin
+      |}""".stripMargin
   } {
     """
-      |class A {
-      |  if (c) {
-      |    duh;
-      |  }
-      |}
+      |/* 001 */ class A {
+      |/* 002 */   if (c) {
+      |/* 003 */     duh;
+      |/* 004 */   }
+      |/* 005 */ }
     """.stripMargin
   }
 
   testCase("single line") {
-    """
-      |class A {
+    """class A {
       | if (c) {duh;}
-      |}
-    """.stripMargin
+      |}""".stripMargin
   }{
     """
-      |class A {
-      |  if (c) {duh;}
-      |}
+      |/* 001 */ class A {
+      |/* 002 */   if (c) {duh;}
+      |/* 003 */ }
     """.stripMargin
   }
 
   testCase("if else on the same line") {
-    """
-      |class A {
+    """class A {
       | if (c) {duh;} else {boo;}
-      |}
-    """.stripMargin
+      |}""".stripMargin
   }{
     """
-      |class A {
-      |  if (c) {duh;} else {boo;}
-      |}
+      |/* 001 */ class A {
+      |/* 002 */   if (c) {duh;} else {boo;}
+      |/* 003 */ }
     """.stripMargin
   }
 
   testCase("function calls") {
-    """
-      |foo(
+    """foo(
       |a,
       |b,
-      |c)
-    """.stripMargin
+      |c)""".stripMargin
   }{
     """
-      |foo(
-      |  a,
-      |  b,
-      |  c)
+      |/* 001 */ foo(
+      |/* 002 */   a,
+      |/* 003 */   b,
+      |/* 004 */   c)
     """.stripMargin
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index a41f04dd3b59..72fa299aa937 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -28,6 +28,38 @@ import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.types.UTF8String
 
+
+/**
+ * A help class for fast reading Int/Long/Float/Double from ByteBuffer in native order.
+ *
+ * WARNNING: This only works with HeapByteBuffer
+ */
+object ByteBufferHelper {
+  def getInt(buffer: ByteBuffer): Int = {
+    val pos = buffer.position()
+    buffer.position(pos + 4)
+    Platform.getInt(buffer.array(), Platform.BYTE_ARRAY_OFFSET + pos)
+  }
+
+  def getLong(buffer: ByteBuffer): Long = {
+    val pos = buffer.position()
+    buffer.position(pos + 8)
+    Platform.getLong(buffer.array(), Platform.BYTE_ARRAY_OFFSET + pos)
+  }
+
+  def getFloat(buffer: ByteBuffer): Float = {
+    val pos = buffer.position()
+    buffer.position(pos + 4)
+    Platform.getFloat(buffer.array(), Platform.BYTE_ARRAY_OFFSET + pos)
+  }
+
+  def getDouble(buffer: ByteBuffer): Double = {
+    val pos = buffer.position()
+    buffer.position(pos + 8)
+    Platform.getDouble(buffer.array(), Platform.BYTE_ARRAY_OFFSET + pos)
+  }
+}
+
 /**
  * An abstract class that represents type of a column. Used to append/extract Java objects into/from
  * the underlying [[ByteBuffer]] of a column.
@@ -134,11 +166,11 @@ private[sql] object INT extends NativeColumnType(IntegerType, 4) {
   }
 
   override def extract(buffer: ByteBuffer): Int = {
-    buffer.getInt()
+    ByteBufferHelper.getInt(buffer)
   }
 
   override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
-    row.setInt(ordinal, buffer.getInt())
+    row.setInt(ordinal, ByteBufferHelper.getInt(buffer))
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: Int): Unit = {
@@ -163,11 +195,11 @@ private[sql] object LONG extends NativeColumnType(LongType, 8) {
   }
 
   override def extract(buffer: ByteBuffer): Long = {
-    buffer.getLong()
+    ByteBufferHelper.getLong(buffer)
   }
 
   override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
-    row.setLong(ordinal, buffer.getLong())
+    row.setLong(ordinal, ByteBufferHelper.getLong(buffer))
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: Long): Unit = {
@@ -191,11 +223,11 @@ private[sql] object FLOAT extends NativeColumnType(FloatType, 4) {
   }
 
   override def extract(buffer: ByteBuffer): Float = {
-    buffer.getFloat()
+    ByteBufferHelper.getFloat(buffer)
   }
 
   override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
-    row.setFloat(ordinal, buffer.getFloat())
+    row.setFloat(ordinal, ByteBufferHelper.getFloat(buffer))
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: Float): Unit = {
@@ -219,11 +251,11 @@ private[sql] object DOUBLE extends NativeColumnType(DoubleType, 8) {
   }
 
   override def extract(buffer: ByteBuffer): Double = {
-    buffer.getDouble()
+    ByteBufferHelper.getDouble(buffer)
   }
 
   override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
-    row.setDouble(ordinal, buffer.getDouble())
+    row.setDouble(ordinal, ByteBufferHelper.getDouble(buffer))
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: Double): Unit = {
@@ -358,7 +390,7 @@ private[sql] case class COMPACT_DECIMAL(precision: Int, scale: Int)
   extends NativeColumnType(DecimalType(precision, scale), 8) {
 
   override def extract(buffer: ByteBuffer): Decimal = {
-    Decimal(buffer.getLong(), precision, scale)
+    Decimal(ByteBufferHelper.getLong(buffer), precision, scale)
   }
 
   override def append(v: Decimal, buffer: ByteBuffer): Unit = {
@@ -480,7 +512,7 @@ private[sql] case class STRUCT(dataType: StructType) extends ColumnType[UnsafeRo
   }
 
   override def extract(buffer: ByteBuffer): UnsafeRow = {
-    val sizeInBytes = buffer.getInt()
+    val sizeInBytes = ByteBufferHelper.getInt(buffer)
     assert(buffer.hasArray)
     val cursor = buffer.position()
     buffer.position(cursor + sizeInBytes)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
new file mode 100644
index 000000000000..e04bcda5800c
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
@@ -0,0 +1,149 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.columnar
+
+import org.apache.spark.Logging
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.{CodeFormatter, CodeGenerator}
+import org.apache.spark.sql.types._
+
+/**
+ * An Iterator to walk throught the InternalRows from a CachedBatch
+ */
+abstract class ColumnarIterator extends Iterator[InternalRow] {
+  def initialize(input: Iterator[CachedBatch], mutableRow: MutableRow, columnTypes: Array[DataType],
+    columnIndexes: Array[Int]): Unit
+}
+
+/**
+ * Generates bytecode for an [[ColumnarIterator]] for columnar cache.
+ */
+object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarIterator] with Logging {
+
+  protected def canonicalize(in: Seq[DataType]): Seq[DataType] = in
+  protected def bind(in: Seq[DataType], inputSchema: Seq[Attribute]): Seq[DataType] = in
+
+  protected def create(columnTypes: Seq[DataType]): ColumnarIterator = {
+    val ctx = newCodeGenContext()
+    val (initializeAccessors, extractors) = columnTypes.zipWithIndex.map { case (dt, index) =>
+      val accessorName = ctx.freshName("accessor")
+      val accessorCls = dt match {
+        case NullType => classOf[NullColumnAccessor].getName
+        case BooleanType => classOf[BooleanColumnAccessor].getName
+        case ByteType => classOf[ByteColumnAccessor].getName
+        case ShortType => classOf[ShortColumnAccessor].getName
+        case IntegerType | DateType => classOf[IntColumnAccessor].getName
+        case LongType | TimestampType => classOf[LongColumnAccessor].getName
+        case FloatType => classOf[FloatColumnAccessor].getName
+        case DoubleType => classOf[DoubleColumnAccessor].getName
+        case StringType => classOf[StringColumnAccessor].getName
+        case BinaryType => classOf[BinaryColumnAccessor].getName
+        case dt: DecimalType if dt.precision <= Decimal.MAX_LONG_DIGITS =>
+          classOf[CompactDecimalColumnAccessor].getName
+        case dt: DecimalType => classOf[DecimalColumnAccessor].getName
+        case struct: StructType => classOf[StructColumnAccessor].getName
+        case array: ArrayType => classOf[ArrayColumnAccessor].getName
+        case t: MapType => classOf[MapColumnAccessor].getName
+      }
+      ctx.addMutableState(accessorCls, accessorName, s"$accessorName = null;")
+
+      val createCode = dt match {
+        case t if ctx.isPrimitiveType(dt) =>
+          s"$accessorName = new $accessorCls(ByteBuffer.wrap(buffers[$index]).order(nativeOrder));"
+        case NullType | StringType | BinaryType =>
+          s"$accessorName = new $accessorCls(ByteBuffer.wrap(buffers[$index]).order(nativeOrder));"
+        case other =>
+          s"""$accessorName = new $accessorCls(ByteBuffer.wrap(buffers[$index]).order(nativeOrder),
+             (${dt.getClass.getName}) columnTypes[$index]);"""
+      }
+
+      val extract = s"$accessorName.extractTo(mutableRow, $index);"
+
+      (createCode, extract)
+    }.unzip
+
+    val code = s"""
+      import java.nio.ByteBuffer;
+      import java.nio.ByteOrder;
+
+      public SpecificColumnarIterator generate($exprType[] expr) {
+        return new SpecificColumnarIterator();
+      }
+
+      class SpecificColumnarIterator extends ${classOf[ColumnarIterator].getName} {
+
+        private ByteOrder nativeOrder = null;
+        private byte[][] buffers = null;
+
+        private int currentRow = 0;
+        private int numRowsInBatch = 0;
+
+        private scala.collection.Iterator input = null;
+        private MutableRow mutableRow = null;
+        private ${classOf[DataType].getName}[] columnTypes = null;
+        private int[] columnIndexes = null;
+
+        ${declareMutableStates(ctx)}
+
+        public SpecificColumnarIterator() {
+          this.nativeOrder = ByteOrder.nativeOrder();
+          this.buffers = new byte[${columnTypes.length}][];
+
+          ${initMutableStates(ctx)}
+        }
+
+        public void initialize(scala.collection.Iterator input, MutableRow mutableRow,
+                               ${classOf[DataType].getName}[] columnTypes, int[] columnIndexes) {
+          this.input = input;
+          this.mutableRow = mutableRow;
+          this.columnTypes = columnTypes;
+          this.columnIndexes = columnIndexes;
+        }
+
+        public boolean hasNext() {
+          if (currentRow < numRowsInBatch) {
+            return true;
+          }
+          if (!input.hasNext()) {
+            return false;
+          }
+
+          ${classOf[CachedBatch].getName} batch = (${classOf[CachedBatch].getName}) input.next();
+          currentRow = 0;
+          numRowsInBatch = batch.numRows();
+          for (int i = 0; i < columnIndexes.length; i ++) {
+            buffers[i] = batch.buffers()[columnIndexes[i]];
+          }
+          ${initializeAccessors.mkString("\n")}
+
+          return hasNext();
+        }
+
+        public InternalRow next() {
+          ${extractors.mkString("\n")}
+          currentRow += 1;
+          return mutableRow;
+        }
+      }"""
+
+    logDebug(s"Generated ColumnarIterator: ${CodeFormatter.format(code)}")
+
+    compile(code).generate(ctx.references.toArray).asInstanceOf[ColumnarIterator]
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index d967814f627c..9f76a61a1574 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.columnar
 
-import java.nio.ByteBuffer
-
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.rdd.RDD
@@ -28,6 +26,7 @@ import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Statistics}
 import org.apache.spark.sql.execution.{ConvertToUnsafe, LeafNode, SparkPlan}
+import org.apache.spark.sql.types.UserDefinedType
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.{Accumulable, Accumulator, Accumulators}
 
@@ -43,7 +42,14 @@ private[sql] object InMemoryRelation {
       tableName)()
 }
 
-private[sql] case class CachedBatch(buffers: Array[Array[Byte]], stats: InternalRow)
+/**
+ * CachedBatch is a cached batch of rows.
+ *
+ * @param numRows The total number of rows in this batch
+ * @param buffers The buffers for serialized columns
+ * @param stats The stat of columns
+ */
+private[sql] case class CachedBatch(numRows: Int, buffers: Array[Array[Byte]], stats: InternalRow)
 
 private[sql] case class InMemoryRelation(
     output: Seq[Attribute],
@@ -151,7 +157,7 @@ private[sql] case class InMemoryRelation(
                         .flatMap(_.values))
 
           batchStats += stats
-          CachedBatch(columnBuilders.map(_.build().array()), stats)
+          CachedBatch(rowCount, columnBuilders.map(_.build().array()), stats)
         }
 
         def hasNext: Boolean = rowIterator.hasNext
@@ -278,59 +284,15 @@ private[sql] case class InMemoryColumnarTableScan(
     val buffers = relation.cachedColumnBuffers
 
     buffers.mapPartitions { cachedBatchIterator =>
-    val partitionFilter = newPredicate(
-      partitionFilters.reduceOption(And).getOrElse(Literal(true)),
-      schema)
-
-      // Find the ordinals and data types of the requested columns.  If none are requested, use the
-      // narrowest (the field with minimum default element size).
-      val (requestedColumnIndices, requestedColumnDataTypes) = if (attributes.isEmpty) {
-        val (narrowestOrdinal, narrowestDataType) =
-          relOutput.zipWithIndex.map { case (a, ordinal) =>
-            ordinal -> a.dataType
-          } minBy { case (_, dataType) =>
-            ColumnType(dataType).defaultSize
-          }
-        Seq(narrowestOrdinal) -> Seq(narrowestDataType)
-      } else {
+      val partitionFilter = newPredicate(
+        partitionFilters.reduceOption(And).getOrElse(Literal(true)),
+        schema)
+
+      // Find the ordinals and data types of the requested columns.
+      val (requestedColumnIndices, requestedColumnDataTypes) =
         attributes.map { a =>
           relOutput.indexWhere(_.exprId == a.exprId) -> a.dataType
         }.unzip
-      }
-
-      val nextRow = new SpecificMutableRow(requestedColumnDataTypes)
-
-      def cachedBatchesToRows(cacheBatches: Iterator[CachedBatch]): Iterator[InternalRow] = {
-        val rows = cacheBatches.flatMap { cachedBatch =>
-          // Build column accessors
-          val columnAccessors = requestedColumnIndices.map { batchColumnIndex =>
-            ColumnAccessor(
-              relOutput(batchColumnIndex).dataType,
-              ByteBuffer.wrap(cachedBatch.buffers(batchColumnIndex)))
-          }
-
-          // Extract rows via column accessors
-          new Iterator[InternalRow] {
-            private[this] val rowLen = nextRow.numFields
-            override def next(): InternalRow = {
-              var i = 0
-              while (i < rowLen) {
-                columnAccessors(i).extractTo(nextRow, i)
-                i += 1
-              }
-              if (attributes.isEmpty) InternalRow.empty else nextRow
-            }
-
-            override def hasNext: Boolean = columnAccessors(0).hasNext
-          }
-        }
-
-        if (rows.hasNext && enableAccumulators) {
-          readPartitions += 1
-        }
-
-        rows
-      }
 
       // Do partition batch pruning if enabled
       val cachedBatchesToScan =
@@ -355,7 +317,18 @@ private[sql] case class InMemoryColumnarTableScan(
           cachedBatchIterator
         }
 
-      cachedBatchesToRows(cachedBatchesToScan)
+      val nextRow = new SpecificMutableRow(requestedColumnDataTypes)
+      val columnTypes = requestedColumnDataTypes.map {
+        case udt: UserDefinedType[_] => udt.sqlType
+        case other => other
+      }.toArray
+      val columnarIterator = GenerateColumnAccessor.generate(columnTypes)
+      columnarIterator.initialize(cachedBatchesToScan, nextRow, columnTypes,
+        requestedColumnIndices.toArray)
+      if (enableAccumulators && columnarIterator.hasNext) {
+        readPartitions += 1
+      }
+      columnarIterator
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala
index 4d35650d4b1e..7eaecfe047c3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala
@@ -31,8 +31,8 @@ private[sql] trait NullableColumnAccessor extends ColumnAccessor {
 
   abstract override protected def initialize(): Unit = {
     nullsBuffer = underlyingBuffer.duplicate().order(ByteOrder.nativeOrder())
-    nullCount = nullsBuffer.getInt()
-    nextNullIndex = if (nullCount > 0) nullsBuffer.getInt() else -1
+    nullCount = ByteBufferHelper.getInt(nullsBuffer)
+    nextNullIndex = if (nullCount > 0) ByteBufferHelper.getInt(nullsBuffer) else -1
     pos = 0
 
     underlyingBuffer.position(underlyingBuffer.position + 4 + nullCount * 4)
@@ -44,7 +44,7 @@ private[sql] trait NullableColumnAccessor extends ColumnAccessor {
       seenNulls += 1
 
       if (seenNulls < nullCount) {
-        nextNullIndex = nullsBuffer.getInt()
+        nextNullIndex = ByteBufferHelper.getInt(nullsBuffer)
       }
 
       row.setNullAt(ordinal)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala
index ca910a99db08..41c9a284e3e4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala
@@ -20,13 +20,11 @@ package org.apache.spark.sql.columnar.compression
 import java.nio.ByteBuffer
 
 import scala.collection.mutable
-import scala.reflect.ClassTag
-import scala.reflect.runtime.universe.runtimeMirror
+
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{MutableRow, SpecificMutableRow}
 import org.apache.spark.sql.columnar._
 import org.apache.spark.sql.types._
-import org.apache.spark.util.Utils
 
 
 private[sql] case object PassThrough extends CompressionScheme {
@@ -161,7 +159,7 @@ private[sql] case object RunLengthEncoding extends CompressionScheme {
     override def next(row: MutableRow, ordinal: Int): Unit = {
       if (valueCount == run) {
         currentValue = columnType.extract(buffer)
-        run = buffer.getInt()
+        run = ByteBufferHelper.getInt(buffer)
         valueCount = 1
       } else {
         valueCount += 1
@@ -271,7 +269,7 @@ private[sql] case object DictionaryEncoding extends CompressionScheme {
     extends compression.Decoder[T] {
 
     private val dictionary: Array[Any] = {
-      val elementNum = buffer.getInt()
+      val elementNum = ByteBufferHelper.getInt(buffer)
       Array.fill[Any](elementNum)(columnType.extract(buffer).asInstanceOf[Any])
     }
 
@@ -352,7 +350,7 @@ private[sql] case object BooleanBitSet extends CompressionScheme {
   }
 
   class Decoder(buffer: ByteBuffer) extends compression.Decoder[BooleanType.type] {
-    private val count = buffer.getInt()
+    private val count = ByteBufferHelper.getInt(buffer)
 
     private var currentWord = 0: Long
 
@@ -363,7 +361,7 @@ private[sql] case object BooleanBitSet extends CompressionScheme {
 
       visited += 1
       if (bit == 0) {
-        currentWord = buffer.getLong()
+        currentWord = ByteBufferHelper.getLong(buffer)
       }
 
       row.setBoolean(ordinal, ((currentWord >> bit) & 1) != 0)
@@ -447,7 +445,7 @@ private[sql] case object IntDelta extends CompressionScheme {
 
     override def next(row: MutableRow, ordinal: Int): Unit = {
       val delta = buffer.get()
-      prev = if (delta > Byte.MinValue) prev + delta else buffer.getInt()
+      prev = if (delta > Byte.MinValue) prev + delta else ByteBufferHelper.getInt(buffer)
       row.setInt(ordinal, prev)
     }
   }
@@ -527,7 +525,7 @@ private[sql] case object LongDelta extends CompressionScheme {
 
     override def next(row: MutableRow, ordinal: Int): Unit = {
       val delta = buffer.get()
-      prev = if (delta > Byte.MinValue) prev + delta else buffer.getLong()
+      prev = if (delta > Byte.MinValue) prev + delta else ByteBufferHelper.getLong(buffer)
       row.setLong(ordinal, prev)
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 4db9f4ee67bb..dc38fe59feed 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -271,7 +271,7 @@ case class Coalesce(numPartitions: Int, child: SparkPlan) extends UnaryNode {
   }
 
   protected override def doExecute(): RDD[InternalRow] = {
-    child.execute().map(_.copy()).coalesce(numPartitions, shuffle = false)
+    child.execute().coalesce(numPartitions, shuffle = false)
   }
 
   override def canProcessUnsafeRows: Boolean = true

From 82e9d9c81b7a8af94e312035328da872684f6e67 Mon Sep 17 00:00:00 2001
From: noelsmith <mail@noelsmith.com>
Date: Tue, 20 Oct 2015 15:05:02 -0700
Subject: [PATCH 302/896] [SPARK-10272][PYSPARK][MLLIB] Added @since tags to
 pyspark.mllib.evaluation

Duplicated the since decorator from pyspark.sql into pyspark (also tweaked to handle functions without docstrings).

Added since to public methods + "versionadded::" to classes (derived from the git file history in pyspark).

Note - I added also the tags to MultilabelMetrics even though it isn't declared as public in the __all__ statement... if that's incorrect - I'll remove.

Author: noelsmith <mail@noelsmith.com>

Closes #8628 from noel-smith/SPARK-10272-since-mllib-evalutation.
---
 python/pyspark/mllib/evaluation.py | 41 ++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/python/pyspark/mllib/evaluation.py b/python/pyspark/mllib/evaluation.py
index a90e5c50e54b..8c87ee9df213 100644
--- a/python/pyspark/mllib/evaluation.py
+++ b/python/pyspark/mllib/evaluation.py
@@ -15,6 +15,7 @@
 # limitations under the License.
 #
 
+from pyspark import since
 from pyspark.mllib.common import JavaModelWrapper, callMLlibFunc
 from pyspark.sql import SQLContext
 from pyspark.sql.types import StructField, StructType, DoubleType, IntegerType, ArrayType
@@ -37,6 +38,8 @@ class BinaryClassificationMetrics(JavaModelWrapper):
     >>> metrics.areaUnderPR
     0.83...
     >>> metrics.unpersist()
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, scoreAndLabels):
@@ -50,6 +53,7 @@ def __init__(self, scoreAndLabels):
         super(BinaryClassificationMetrics, self).__init__(java_model)
 
     @property
+    @since('1.4.0')
     def areaUnderROC(self):
         """
         Computes the area under the receiver operating characteristic
@@ -58,12 +62,14 @@ def areaUnderROC(self):
         return self.call("areaUnderROC")
 
     @property
+    @since('1.4.0')
     def areaUnderPR(self):
         """
         Computes the area under the precision-recall curve.
         """
         return self.call("areaUnderPR")
 
+    @since('1.4.0')
     def unpersist(self):
         """
         Unpersists intermediate RDDs used in the computation.
@@ -91,6 +97,8 @@ class RegressionMetrics(JavaModelWrapper):
     0.61...
     >>> metrics.r2
     0.94...
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, predictionAndObservations):
@@ -104,6 +112,7 @@ def __init__(self, predictionAndObservations):
         super(RegressionMetrics, self).__init__(java_model)
 
     @property
+    @since('1.4.0')
     def explainedVariance(self):
         """
         Returns the explained variance regression score.
@@ -112,6 +121,7 @@ def explainedVariance(self):
         return self.call("explainedVariance")
 
     @property
+    @since('1.4.0')
     def meanAbsoluteError(self):
         """
         Returns the mean absolute error, which is a risk function corresponding to the
@@ -120,6 +130,7 @@ def meanAbsoluteError(self):
         return self.call("meanAbsoluteError")
 
     @property
+    @since('1.4.0')
     def meanSquaredError(self):
         """
         Returns the mean squared error, which is a risk function corresponding to the
@@ -128,6 +139,7 @@ def meanSquaredError(self):
         return self.call("meanSquaredError")
 
     @property
+    @since('1.4.0')
     def rootMeanSquaredError(self):
         """
         Returns the root mean squared error, which is defined as the square root of
@@ -136,6 +148,7 @@ def rootMeanSquaredError(self):
         return self.call("rootMeanSquaredError")
 
     @property
+    @since('1.4.0')
     def r2(self):
         """
         Returns R^2^, the coefficient of determination.
@@ -178,6 +191,8 @@ class MulticlassMetrics(JavaModelWrapper):
     0.66...
     >>> metrics.weightedFMeasure(2.0)
     0.65...
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, predictionAndLabels):
@@ -190,6 +205,7 @@ def __init__(self, predictionAndLabels):
         java_model = java_class(df._jdf)
         super(MulticlassMetrics, self).__init__(java_model)
 
+    @since('1.4.0')
     def confusionMatrix(self):
         """
         Returns confusion matrix: predicted classes are in columns,
@@ -197,18 +213,21 @@ def confusionMatrix(self):
         """
         return self.call("confusionMatrix")
 
+    @since('1.4.0')
     def truePositiveRate(self, label):
         """
         Returns true positive rate for a given label (category).
         """
         return self.call("truePositiveRate", label)
 
+    @since('1.4.0')
     def falsePositiveRate(self, label):
         """
         Returns false positive rate for a given label (category).
         """
         return self.call("falsePositiveRate", label)
 
+    @since('1.4.0')
     def precision(self, label=None):
         """
         Returns precision or precision for a given label (category) if specified.
@@ -218,6 +237,7 @@ def precision(self, label=None):
         else:
             return self.call("precision", float(label))
 
+    @since('1.4.0')
     def recall(self, label=None):
         """
         Returns recall or recall for a given label (category) if specified.
@@ -227,6 +247,7 @@ def recall(self, label=None):
         else:
             return self.call("recall", float(label))
 
+    @since('1.4.0')
     def fMeasure(self, label=None, beta=None):
         """
         Returns f-measure or f-measure for a given label (category) if specified.
@@ -243,6 +264,7 @@ def fMeasure(self, label=None, beta=None):
                 return self.call("fMeasure", label, beta)
 
     @property
+    @since('1.4.0')
     def weightedTruePositiveRate(self):
         """
         Returns weighted true positive rate.
@@ -251,6 +273,7 @@ def weightedTruePositiveRate(self):
         return self.call("weightedTruePositiveRate")
 
     @property
+    @since('1.4.0')
     def weightedFalsePositiveRate(self):
         """
         Returns weighted false positive rate.
@@ -258,6 +281,7 @@ def weightedFalsePositiveRate(self):
         return self.call("weightedFalsePositiveRate")
 
     @property
+    @since('1.4.0')
     def weightedRecall(self):
         """
         Returns weighted averaged recall.
@@ -266,12 +290,14 @@ def weightedRecall(self):
         return self.call("weightedRecall")
 
     @property
+    @since('1.4.0')
     def weightedPrecision(self):
         """
         Returns weighted averaged precision.
         """
         return self.call("weightedPrecision")
 
+    @since('1.4.0')
     def weightedFMeasure(self, beta=None):
         """
         Returns weighted averaged f-measure.
@@ -307,6 +333,7 @@ class RankingMetrics(JavaModelWrapper):
     >>> metrics.ndcgAt(10)
     0.48...
 
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, predictionAndLabels):
@@ -317,6 +344,7 @@ def __init__(self, predictionAndLabels):
         java_model = callMLlibFunc("newRankingMetrics", df._jdf)
         super(RankingMetrics, self).__init__(java_model)
 
+    @since('1.4.0')
     def precisionAt(self, k):
         """
         Compute the average precision of all the queries, truncated at ranking position k.
@@ -331,6 +359,7 @@ def precisionAt(self, k):
         return self.call("precisionAt", int(k))
 
     @property
+    @since('1.4.0')
     def meanAveragePrecision(self):
         """
         Returns the mean average precision (MAP) of all the queries.
@@ -339,6 +368,7 @@ def meanAveragePrecision(self):
         """
         return self.call("meanAveragePrecision")
 
+    @since('1.4.0')
     def ndcgAt(self, k):
         """
         Compute the average NDCG value of all the queries, truncated at ranking position k.
@@ -388,6 +418,8 @@ class MultilabelMetrics(JavaModelWrapper):
     0.28...
     >>> metrics.accuracy
     0.54...
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, predictionAndLabels):
@@ -399,6 +431,7 @@ def __init__(self, predictionAndLabels):
         java_model = java_class(df._jdf)
         super(MultilabelMetrics, self).__init__(java_model)
 
+    @since('1.4.0')
     def precision(self, label=None):
         """
         Returns precision or precision for a given label (category) if specified.
@@ -408,6 +441,7 @@ def precision(self, label=None):
         else:
             return self.call("precision", float(label))
 
+    @since('1.4.0')
     def recall(self, label=None):
         """
         Returns recall or recall for a given label (category) if specified.
@@ -417,6 +451,7 @@ def recall(self, label=None):
         else:
             return self.call("recall", float(label))
 
+    @since('1.4.0')
     def f1Measure(self, label=None):
         """
         Returns f1Measure or f1Measure for a given label (category) if specified.
@@ -427,6 +462,7 @@ def f1Measure(self, label=None):
             return self.call("f1Measure", float(label))
 
     @property
+    @since('1.4.0')
     def microPrecision(self):
         """
         Returns micro-averaged label-based precision.
@@ -435,6 +471,7 @@ def microPrecision(self):
         return self.call("microPrecision")
 
     @property
+    @since('1.4.0')
     def microRecall(self):
         """
         Returns micro-averaged label-based recall.
@@ -443,6 +480,7 @@ def microRecall(self):
         return self.call("microRecall")
 
     @property
+    @since('1.4.0')
     def microF1Measure(self):
         """
         Returns micro-averaged label-based f1-measure.
@@ -451,6 +489,7 @@ def microF1Measure(self):
         return self.call("microF1Measure")
 
     @property
+    @since('1.4.0')
     def hammingLoss(self):
         """
         Returns Hamming-loss.
@@ -458,6 +497,7 @@ def hammingLoss(self):
         return self.call("hammingLoss")
 
     @property
+    @since('1.4.0')
     def subsetAccuracy(self):
         """
         Returns subset accuracy.
@@ -466,6 +506,7 @@ def subsetAccuracy(self):
         return self.call("subsetAccuracy")
 
     @property
+    @since('1.4.0')
     def accuracy(self):
         """
         Returns accuracy.

From 9f49895fefc294ef40b2e974f1f8b311087c54df Mon Sep 17 00:00:00 2001
From: Tijo Thomas <tijoparacka@gmail.com>
Date: Tue, 20 Oct 2015 16:13:34 -0700
Subject: [PATCH 303/896] [SPARK-10261][DOCUMENTATION, ML] Fixed @Since
 annotation to ml.evaluation

Author: Tijo Thomas <tijoparacka@gmail.com>
Author: tijo <tijo@ezzoft.com>

Closes #8554 from tijoparacka/SPARK-10261-2.
---
 .../BinaryClassificationEvaluator.scala           | 15 +++++++++++++--
 .../apache/spark/ml/evaluation/Evaluator.scala    |  7 ++++++-
 .../MulticlassClassificationEvaluator.scala       | 14 ++++++++++++--
 .../spark/ml/evaluation/RegressionEvaluator.scala | 14 ++++++++++++--
 4 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
index 08df2919a8a8..1fe3abaca81c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.evaluation
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
@@ -30,10 +30,12 @@ import org.apache.spark.sql.types.DoubleType
  * :: Experimental ::
  * Evaluator for binary classification, which expects two input columns: rawPrediction and label.
  */
+@Since("1.2.0")
 @Experimental
-class BinaryClassificationEvaluator(override val uid: String)
+class BinaryClassificationEvaluator @Since("1.4.0") (@Since("1.4.0") override val uid: String)
   extends Evaluator with HasRawPredictionCol with HasLabelCol {
 
+  @Since("1.2.0")
   def this() = this(Identifiable.randomUID("binEval"))
 
   /**
@@ -41,6 +43,7 @@ class BinaryClassificationEvaluator(override val uid: String)
    * Default: areaUnderROC
    * @group param
    */
+  @Since("1.2.0")
   val metricName: Param[String] = {
     val allowedParams = ParamValidators.inArray(Array("areaUnderROC", "areaUnderPR"))
     new Param(
@@ -48,12 +51,15 @@ class BinaryClassificationEvaluator(override val uid: String)
   }
 
   /** @group getParam */
+  @Since("1.2.0")
   def getMetricName: String = $(metricName)
 
   /** @group setParam */
+  @Since("1.2.0")
   def setMetricName(value: String): this.type = set(metricName, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setRawPredictionCol(value: String): this.type = set(rawPredictionCol, value)
 
   /**
@@ -61,13 +67,16 @@ class BinaryClassificationEvaluator(override val uid: String)
    * @deprecated use [[setRawPredictionCol()]] instead
    */
   @deprecated("use setRawPredictionCol instead", "1.5.0")
+  @Since("1.2.0")
   def setScoreCol(value: String): this.type = set(rawPredictionCol, value)
 
   /** @group setParam */
+  @Since("1.2.0")
   def setLabelCol(value: String): this.type = set(labelCol, value)
 
   setDefault(metricName -> "areaUnderROC")
 
+  @Since("1.2.0")
   override def evaluate(dataset: DataFrame): Double = {
     val schema = dataset.schema
     SchemaUtils.checkColumnType(schema, $(rawPredictionCol), new VectorUDT)
@@ -87,10 +96,12 @@ class BinaryClassificationEvaluator(override val uid: String)
     metric
   }
 
+  @Since("1.5.0")
   override def isLargerBetter: Boolean = $(metricName) match {
     case "areaUnderROC" => true
     case "areaUnderPR" => true
   }
 
+  @Since("1.4.1")
   override def copy(extra: ParamMap): BinaryClassificationEvaluator = defaultCopy(extra)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/Evaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/Evaluator.scala
index 13bd3307f8a2..0f22cca3a78d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/Evaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/Evaluator.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.evaluation
 
-import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.ml.param.{ParamMap, Params}
 import org.apache.spark.sql.DataFrame
 
@@ -25,6 +25,7 @@ import org.apache.spark.sql.DataFrame
  * :: DeveloperApi ::
  * Abstract class for evaluators that compute metrics from predictions.
  */
+@Since("1.5.0")
 @DeveloperApi
 abstract class Evaluator extends Params {
 
@@ -35,6 +36,7 @@ abstract class Evaluator extends Params {
    * @param paramMap parameter map that specifies the input columns and output metrics
    * @return metric
    */
+  @Since("1.5.0")
   def evaluate(dataset: DataFrame, paramMap: ParamMap): Double = {
     this.copy(paramMap).evaluate(dataset)
   }
@@ -44,6 +46,7 @@ abstract class Evaluator extends Params {
    * @param dataset a dataset that contains labels/observations and predictions.
    * @return metric
    */
+  @Since("1.5.0")
   def evaluate(dataset: DataFrame): Double
 
   /**
@@ -51,7 +54,9 @@ abstract class Evaluator extends Params {
    * or minimized (false).
    * A given evaluator may support multiple metrics which may be maximized or minimized.
    */
+  @Since("1.5.0")
   def isLargerBetter: Boolean = true
 
+  @Since("1.5.0")
   override def copy(extra: ParamMap): Evaluator
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
index f73d2345078e..df5f04ca5a8d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.evaluation
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param.{ParamMap, ParamValidators, Param}
 import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
 import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
@@ -29,10 +29,12 @@ import org.apache.spark.sql.types.DoubleType
  * :: Experimental ::
  * Evaluator for multiclass classification, which expects two input columns: score and label.
  */
+@Since("1.5.0")
 @Experimental
-class MulticlassClassificationEvaluator (override val uid: String)
+class MulticlassClassificationEvaluator @Since("1.5.0") (@Since("1.5.0") override val uid: String)
   extends Evaluator with HasPredictionCol with HasLabelCol {
 
+  @Since("1.5.0")
   def this() = this(Identifiable.randomUID("mcEval"))
 
   /**
@@ -40,6 +42,7 @@ class MulticlassClassificationEvaluator (override val uid: String)
    * `"weightedPrecision"`, `"weightedRecall"`)
    * @group param
    */
+  @Since("1.5.0")
   val metricName: Param[String] = {
     val allowedParams = ParamValidators.inArray(Array("f1", "precision",
       "recall", "weightedPrecision", "weightedRecall"))
@@ -48,19 +51,24 @@ class MulticlassClassificationEvaluator (override val uid: String)
   }
 
   /** @group getParam */
+  @Since("1.5.0")
   def getMetricName: String = $(metricName)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setMetricName(value: String): this.type = set(metricName, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setLabelCol(value: String): this.type = set(labelCol, value)
 
   setDefault(metricName -> "f1")
 
+  @Since("1.5.0")
   override def evaluate(dataset: DataFrame): Double = {
     val schema = dataset.schema
     SchemaUtils.checkColumnType(schema, $(predictionCol), DoubleType)
@@ -81,6 +89,7 @@ class MulticlassClassificationEvaluator (override val uid: String)
     metric
   }
 
+  @Since("1.5.0")
   override def isLargerBetter: Boolean = $(metricName) match {
     case "f1" => true
     case "precision" => true
@@ -89,5 +98,6 @@ class MulticlassClassificationEvaluator (override val uid: String)
     case "weightedRecall" => true
   }
 
+  @Since("1.5.0")
   override def copy(extra: ParamMap): MulticlassClassificationEvaluator = defaultCopy(extra)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
index d21c88ab9b10..3fd34d857101 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.evaluation
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param.{Param, ParamMap, ParamValidators}
 import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
 import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
@@ -29,10 +29,12 @@ import org.apache.spark.sql.types.DoubleType
  * :: Experimental ::
  * Evaluator for regression, which expects two input columns: prediction and label.
  */
+@Since("1.4.0")
 @Experimental
-final class RegressionEvaluator(override val uid: String)
+final class RegressionEvaluator @Since("1.4.0") (@Since("1.4.0") override val uid: String)
   extends Evaluator with HasPredictionCol with HasLabelCol {
 
+  @Since("1.4.0")
   def this() = this(Identifiable.randomUID("regEval"))
 
   /**
@@ -43,25 +45,31 @@ final class RegressionEvaluator(override val uid: String)
    * we take and output the negative of this metric.
    * @group param
    */
+  @Since("1.4.0")
   val metricName: Param[String] = {
     val allowedParams = ParamValidators.inArray(Array("mse", "rmse", "r2", "mae"))
     new Param(this, "metricName", "metric name in evaluation (mse|rmse|r2|mae)", allowedParams)
   }
 
   /** @group getParam */
+  @Since("1.4.0")
   def getMetricName: String = $(metricName)
 
   /** @group setParam */
+  @Since("1.4.0")
   def setMetricName(value: String): this.type = set(metricName, value)
 
   /** @group setParam */
+  @Since("1.4.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
   /** @group setParam */
+  @Since("1.4.0")
   def setLabelCol(value: String): this.type = set(labelCol, value)
 
   setDefault(metricName -> "rmse")
 
+  @Since("1.4.0")
   override def evaluate(dataset: DataFrame): Double = {
     val schema = dataset.schema
     SchemaUtils.checkColumnType(schema, $(predictionCol), DoubleType)
@@ -81,6 +89,7 @@ final class RegressionEvaluator(override val uid: String)
     metric
   }
 
+  @Since("1.4.0")
   override def isLargerBetter: Boolean = $(metricName) match {
     case "rmse" => false
     case "mse" => false
@@ -88,5 +97,6 @@ final class RegressionEvaluator(override val uid: String)
     case "mae" => false
   }
 
+  @Since("1.5.0")
   override def copy(extra: ParamMap): RegressionEvaluator = defaultCopy(extra)
 }

From 04521ea067d6ed3c5398067f07904d27c77017ff Mon Sep 17 00:00:00 2001
From: noelsmith <mail@noelsmith.com>
Date: Tue, 20 Oct 2015 16:14:20 -0700
Subject: [PATCH 304/896] [SPARK-10269][PYSPARK][MLLIB] Add @since annotation
 to pyspark.mllib.classification

Duplicated the since decorator from pyspark.sql into pyspark (also tweaked to handle functions without docstrings).

Added since to methods + "versionadded::" to classes derived from the file history.

Note - some methods are inherited from the regression module (i.e. LinearModel.intercept) so these won't have version numbers in the API docs until that model is updated.

Author: noelsmith <mail@noelsmith.com>

Closes #8626 from noel-smith/SPARK-10269-since-mlib-classification.
---
 python/pyspark/mllib/classification.py | 70 ++++++++++++++++++++++++--
 1 file changed, 66 insertions(+), 4 deletions(-)

diff --git a/python/pyspark/mllib/classification.py b/python/pyspark/mllib/classification.py
index b77754500bde..aab4015ba80f 100644
--- a/python/pyspark/mllib/classification.py
+++ b/python/pyspark/mllib/classification.py
@@ -20,7 +20,7 @@
 import numpy
 from numpy import array
 
-from pyspark import RDD
+from pyspark import RDD, since
 from pyspark.streaming import DStream
 from pyspark.mllib.common import callMLlibFunc, _py2java, _java2py
 from pyspark.mllib.linalg import DenseVector, SparseVector, _convert_to_vector
@@ -44,6 +44,7 @@ def __init__(self, weights, intercept):
         super(LinearClassificationModel, self).__init__(weights, intercept)
         self._threshold = None
 
+    @since('1.4.0')
     def setThreshold(self, value):
         """
         .. note:: Experimental
@@ -57,6 +58,7 @@ def setThreshold(self, value):
         self._threshold = value
 
     @property
+    @since('1.4.0')
     def threshold(self):
         """
         .. note:: Experimental
@@ -67,6 +69,7 @@ def threshold(self):
         """
         return self._threshold
 
+    @since('1.4.0')
     def clearThreshold(self):
         """
         .. note:: Experimental
@@ -76,6 +79,7 @@ def clearThreshold(self):
         """
         self._threshold = None
 
+    @since('1.4.0')
     def predict(self, test):
         """
         Predict values for a single data point or an RDD of points
@@ -157,6 +161,8 @@ class LogisticRegressionModel(LinearClassificationModel):
     1
     >>> mcm.predict([0.0, 0.0, 0.3])
     2
+
+    .. versionadded:: 0.9.0
     """
     def __init__(self, weights, intercept, numFeatures, numClasses):
         super(LogisticRegressionModel, self).__init__(weights, intercept)
@@ -172,13 +178,23 @@ def __init__(self, weights, intercept, numFeatures, numClasses):
                                                                 self._dataWithBiasSize)
 
     @property
+    @since('1.4.0')
     def numFeatures(self):
+        """
+        Dimension of the features.
+        """
         return self._numFeatures
 
     @property
+    @since('1.4.0')
     def numClasses(self):
+        """
+        Number of possible outcomes for k classes classification problem in Multinomial
+        Logistic Regression.
+        """
         return self._numClasses
 
+    @since('0.9.0')
     def predict(self, x):
         """
         Predict values for a single data point or an RDD of points
@@ -217,13 +233,21 @@ def predict(self, x):
                         best_class = i + 1
             return best_class
 
+    @since('1.4.0')
     def save(self, sc, path):
+        """
+        Save this model to the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.classification.LogisticRegressionModel(
             _py2java(sc, self._coeff), self.intercept, self.numFeatures, self.numClasses)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since('1.4.0')
     def load(cls, sc, path):
+        """
+        Load a model from the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.classification.LogisticRegressionModel.load(
             sc._jsc.sc(), path)
         weights = _java2py(sc, java_model.weights())
@@ -237,8 +261,11 @@ def load(cls, sc, path):
 
 
 class LogisticRegressionWithSGD(object):
-
+    """
+    .. versionadded:: 0.9.0
+    """
     @classmethod
+    @since('0.9.0')
     def train(cls, data, iterations=100, step=1.0, miniBatchFraction=1.0,
               initialWeights=None, regParam=0.01, regType="l2", intercept=False,
               validateData=True, convergenceTol=0.001):
@@ -286,8 +313,11 @@ def train(rdd, i):
 
 
 class LogisticRegressionWithLBFGS(object):
-
+    """
+    .. versionadded:: 1.2.0
+    """
     @classmethod
+    @since('1.2.0')
     def train(cls, data, iterations=100, initialWeights=None, regParam=0.01, regType="l2",
               intercept=False, corrections=10, tolerance=1e-4, validateData=True, numClasses=2):
         """
@@ -399,11 +429,14 @@ class SVMModel(LinearClassificationModel):
     ...    rmtree(path)
     ... except:
     ...    pass
+
+    .. versionadded:: 0.9.0
     """
     def __init__(self, weights, intercept):
         super(SVMModel, self).__init__(weights, intercept)
         self._threshold = 0.0
 
+    @since('0.9.0')
     def predict(self, x):
         """
         Predict values for a single data point or an RDD of points
@@ -419,13 +452,21 @@ def predict(self, x):
         else:
             return 1 if margin > self._threshold else 0
 
+    @since('1.4.0')
     def save(self, sc, path):
+        """
+        Save this model to the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.classification.SVMModel(
             _py2java(sc, self._coeff), self.intercept)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since('1.4.0')
     def load(cls, sc, path):
+        """
+        Load a model from the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.classification.SVMModel.load(
             sc._jsc.sc(), path)
         weights = _java2py(sc, java_model.weights())
@@ -437,8 +478,12 @@ def load(cls, sc, path):
 
 
 class SVMWithSGD(object):
+    """
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since('0.9.0')
     def train(cls, data, iterations=100, step=1.0, regParam=0.01,
               miniBatchFraction=1.0, initialWeights=None, regType="l2",
               intercept=False, validateData=True, convergenceTol=0.001):
@@ -530,13 +575,15 @@ class NaiveBayesModel(Saveable, Loader):
     ...     rmtree(path)
     ... except OSError:
     ...     pass
-    """
 
+    .. versionadded:: 0.9.0
+    """
     def __init__(self, labels, pi, theta):
         self.labels = labels
         self.pi = pi
         self.theta = theta
 
+    @since('0.9.0')
     def predict(self, x):
         """
         Return the most likely class for a data vector
@@ -548,6 +595,9 @@ def predict(self, x):
         return self.labels[numpy.argmax(self.pi + x.dot(self.theta.transpose()))]
 
     def save(self, sc, path):
+        """
+        Save this model to the given path.
+        """
         java_labels = _py2java(sc, self.labels.tolist())
         java_pi = _py2java(sc, self.pi.tolist())
         java_theta = _py2java(sc, self.theta.tolist())
@@ -556,7 +606,11 @@ def save(self, sc, path):
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since('1.4.0')
     def load(cls, sc, path):
+        """
+        Load a model from the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.classification.NaiveBayesModel.load(
             sc._jsc.sc(), path)
         # Can not unpickle array.array from Pyrolite in Python3 with "bytes"
@@ -567,8 +621,12 @@ def load(cls, sc, path):
 
 
 class NaiveBayes(object):
+    """
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since('0.9.0')
     def train(cls, data, lambda_=1.0):
         """
         Train a Naive Bayes model given an RDD of (label, features)
@@ -605,6 +663,8 @@ class StreamingLogisticRegressionWithSGD(StreamingLinearAlgorithm):
                               iteration.
     :param regParam: L2 Regularization parameter.
     :param convergenceTol: A condition which decides iteration termination.
+
+    .. versionadded:: 1.5.0
     """
     def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, regParam=0.01,
                  convergenceTol=0.001):
@@ -617,6 +677,7 @@ def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, regPar
         super(StreamingLogisticRegressionWithSGD, self).__init__(
             model=self._model)
 
+    @since('1.5.0')
     def setInitialWeights(self, initialWeights):
         """
         Set the initial value of weights.
@@ -630,6 +691,7 @@ def setInitialWeights(self, initialWeights):
             initialWeights, 0, initialWeights.size, 2)
         return self
 
+    @since('1.5.0')
     def trainOn(self, dstream):
         """Train the model on the incoming dstream."""
         self._validate(dstream)

From da46b77afd13df8eb696e4612224ae29cc198c0b Mon Sep 17 00:00:00 2001
From: MechCoder <manojkumarsivaraj334@gmail.com>
Date: Tue, 20 Oct 2015 16:35:34 -0700
Subject: [PATCH 305/896] [SPARK-10082][MLLIB] Validate i, j in apply
 DenseMatrices and SparseMatrices

Given row_ind should be less than the number of rows
Given col_ind should be less than the number of cols.

The current code in master gives unpredictable behavior for such cases.

Author: MechCoder <manojkumarsivaraj334@gmail.com>

Closes #8271 from MechCoder/hash_code_matrices.
---
 .../org/apache/spark/mllib/linalg/Matrices.scala      |  4 ++++
 .../org/apache/spark/mllib/linalg/MatricesSuite.scala | 11 +++++++++++
 2 files changed, 15 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
index c02ba426fcc3..cfed9ad0730b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
@@ -296,6 +296,8 @@ class DenseMatrix @Since("1.3.0") (
   override def apply(i: Int, j: Int): Double = values(index(i, j))
 
   private[mllib] def index(i: Int, j: Int): Int = {
+    require(i < numRows && i >=0, s"Expected 0 <= i < $numRows, got $i")
+    require(j < numCols && j >=0, s"Expected 0 <= j < $numCols, got $j")
     if (!isTransposed) i + numRows * j else j + numCols * i
   }
 
@@ -570,6 +572,8 @@ class SparseMatrix @Since("1.3.0") (
   }
 
   private[mllib] def index(i: Int, j: Int): Int = {
+    require(i < numRows && i >=0, s"Expected 0 <= i < $numRows, got $i")
+    require(j < numCols && j >=0, s"Expected 0 <= j < $numCols, got $j")
     if (!isTransposed) {
       Arrays.binarySearch(rowIndices, colPtrs(j), colPtrs(j + 1), i)
     } else {
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
index bfd6d5495f5e..b0071c9a028a 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
@@ -74,6 +74,17 @@ class MatricesSuite extends SparkFunSuite {
     }
   }
 
+  test("index in matrices incorrect input") {
+    val sm = Matrices.sparse(3, 2, Array(0, 2, 3), Array(1, 2, 1), Array(0.0, 1.0, 2.0))
+    val dm = Matrices.dense(3, 2, Array(0.0, 2.3, 1.4, 3.2, 1.0, 9.1))
+    Array(sm, dm).foreach { mat =>
+        intercept[IllegalArgumentException] { mat.index(4, 1) }
+        intercept[IllegalArgumentException] { mat.index(1, 4) }
+        intercept[IllegalArgumentException] { mat.index(-1, 2) }
+        intercept[IllegalArgumentException] { mat.index(1, -2) }
+    }
+  }
+
   test("equals") {
     val dm1 = Matrices.dense(2, 2, Array(0.0, 1.0, 2.0, 3.0))
     assert(dm1 === dm1)

From aea7142c9802d1e855443c01621ebc8d57be8c5e Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@pigscanfly.ca>
Date: Tue, 20 Oct 2015 16:51:32 -0700
Subject: [PATCH 306/896] [SPARK-10767][PYSPARK] Make pyspark shared params
 codegen more consistent

Namely "." shows up in some places in the template when using the param docstring and not in others

Author: Holden Karau <holden@pigscanfly.ca>

Closes #9017 from holdenk/SPARK-10767-Make-pyspark-shared-params-codegen-more-consistent.
---
 .../ml/param/_shared_params_code_gen.py       | 28 +++---
 python/pyspark/ml/param/shared.py             | 94 +++++++++----------
 python/pyspark/ml/tests.py                    |  8 +-
 3 files changed, 65 insertions(+), 65 deletions(-)

diff --git a/python/pyspark/ml/param/_shared_params_code_gen.py b/python/pyspark/ml/param/_shared_params_code_gen.py
index 45a94e9c3296..7143d56330bd 100644
--- a/python/pyspark/ml/param/_shared_params_code_gen.py
+++ b/python/pyspark/ml/param/_shared_params_code_gen.py
@@ -47,7 +47,7 @@ def _gen_param_header(name, doc, defaultValueStr):
     """
     template = '''class Has$Name(Params):
     """
-    Mixin for param $name: $doc.
+    Mixin for param $name: $doc
     """
 
     # a placeholder to make it appear in the generated doc
@@ -105,22 +105,22 @@ def get$Name(self):
     print("\n# DO NOT MODIFY THIS FILE! It was generated by _shared_params_code_gen.py.\n")
     print("from pyspark.ml.param import Param, Params\n\n")
     shared = [
-        ("maxIter", "max number of iterations (>= 0)", None),
-        ("regParam", "regularization parameter (>= 0)", None),
-        ("featuresCol", "features column name", "'features'"),
-        ("labelCol", "label column name", "'label'"),
-        ("predictionCol", "prediction column name", "'prediction'"),
+        ("maxIter", "max number of iterations (>= 0).", None),
+        ("regParam", "regularization parameter (>= 0).", None),
+        ("featuresCol", "features column name.", "'features'"),
+        ("labelCol", "label column name.", "'label'"),
+        ("predictionCol", "prediction column name.", "'prediction'"),
         ("probabilityCol", "Column name for predicted class conditional probabilities. " +
          "Note: Not all models output well-calibrated probability estimates! These probabilities " +
          "should be treated as confidences, not precise probabilities.", "'probability'"),
-        ("rawPredictionCol", "raw prediction (a.k.a. confidence) column name", "'rawPrediction'"),
-        ("inputCol", "input column name", None),
-        ("inputCols", "input column names", None),
-        ("outputCol", "output column name", "self.uid + '__output'"),
-        ("numFeatures", "number of features", None),
-        ("checkpointInterval", "checkpoint interval (>= 1)", None),
-        ("seed", "random seed", "hash(type(self).__name__)"),
-        ("tol", "the convergence tolerance for iterative algorithms", None),
+        ("rawPredictionCol", "raw prediction (a.k.a. confidence) column name.", "'rawPrediction'"),
+        ("inputCol", "input column name.", None),
+        ("inputCols", "input column names.", None),
+        ("outputCol", "output column name.", "self.uid + '__output'"),
+        ("numFeatures", "number of features.", None),
+        ("checkpointInterval", "checkpoint interval (>= 1).", None),
+        ("seed", "random seed.", "hash(type(self).__name__)"),
+        ("tol", "the convergence tolerance for iterative algorithms.", None),
         ("stepSize", "Step size to be used for each iteration of optimization.", None),
         ("handleInvalid", "how to handle invalid entries. Options are skip (which will filter " +
          "out rows with bad values), or error (which will throw an errror). More options may be " +
diff --git a/python/pyspark/ml/param/shared.py b/python/pyspark/ml/param/shared.py
index 8c438bc74f51..3a58ac87d6b6 100644
--- a/python/pyspark/ml/param/shared.py
+++ b/python/pyspark/ml/param/shared.py
@@ -26,12 +26,12 @@ class HasMaxIter(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    maxIter = Param(Params._dummy(), "maxIter", "max number of iterations (>= 0)")
+    maxIter = Param(Params._dummy(), "maxIter", "max number of iterations (>= 0).")
 
     def __init__(self):
         super(HasMaxIter, self).__init__()
-        #: param for max number of iterations (>= 0)
-        self.maxIter = Param(self, "maxIter", "max number of iterations (>= 0)")
+        #: param for max number of iterations (>= 0).
+        self.maxIter = Param(self, "maxIter", "max number of iterations (>= 0).")
 
     def setMaxIter(self, value):
         """
@@ -53,12 +53,12 @@ class HasRegParam(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    regParam = Param(Params._dummy(), "regParam", "regularization parameter (>= 0)")
+    regParam = Param(Params._dummy(), "regParam", "regularization parameter (>= 0).")
 
     def __init__(self):
         super(HasRegParam, self).__init__()
-        #: param for regularization parameter (>= 0)
-        self.regParam = Param(self, "regParam", "regularization parameter (>= 0)")
+        #: param for regularization parameter (>= 0).
+        self.regParam = Param(self, "regParam", "regularization parameter (>= 0).")
 
     def setRegParam(self, value):
         """
@@ -80,12 +80,12 @@ class HasFeaturesCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    featuresCol = Param(Params._dummy(), "featuresCol", "features column name")
+    featuresCol = Param(Params._dummy(), "featuresCol", "features column name.")
 
     def __init__(self):
         super(HasFeaturesCol, self).__init__()
-        #: param for features column name
-        self.featuresCol = Param(self, "featuresCol", "features column name")
+        #: param for features column name.
+        self.featuresCol = Param(self, "featuresCol", "features column name.")
         self._setDefault(featuresCol='features')
 
     def setFeaturesCol(self, value):
@@ -108,12 +108,12 @@ class HasLabelCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    labelCol = Param(Params._dummy(), "labelCol", "label column name")
+    labelCol = Param(Params._dummy(), "labelCol", "label column name.")
 
     def __init__(self):
         super(HasLabelCol, self).__init__()
-        #: param for label column name
-        self.labelCol = Param(self, "labelCol", "label column name")
+        #: param for label column name.
+        self.labelCol = Param(self, "labelCol", "label column name.")
         self._setDefault(labelCol='label')
 
     def setLabelCol(self, value):
@@ -136,12 +136,12 @@ class HasPredictionCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    predictionCol = Param(Params._dummy(), "predictionCol", "prediction column name")
+    predictionCol = Param(Params._dummy(), "predictionCol", "prediction column name.")
 
     def __init__(self):
         super(HasPredictionCol, self).__init__()
-        #: param for prediction column name
-        self.predictionCol = Param(self, "predictionCol", "prediction column name")
+        #: param for prediction column name.
+        self.predictionCol = Param(self, "predictionCol", "prediction column name.")
         self._setDefault(predictionCol='prediction')
 
     def setPredictionCol(self, value):
@@ -160,7 +160,7 @@ def getPredictionCol(self):
 
 class HasProbabilityCol(Params):
     """
-    Mixin for param probabilityCol: Column name for predicted class conditional probabilities. Note: Not all models output well-calibrated probability estimates! These probabilities should be treated as confidences, not precise probabilities..
+    Mixin for param probabilityCol: Column name for predicted class conditional probabilities. Note: Not all models output well-calibrated probability estimates! These probabilities should be treated as confidences, not precise probabilities.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -192,12 +192,12 @@ class HasRawPredictionCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    rawPredictionCol = Param(Params._dummy(), "rawPredictionCol", "raw prediction (a.k.a. confidence) column name")
+    rawPredictionCol = Param(Params._dummy(), "rawPredictionCol", "raw prediction (a.k.a. confidence) column name.")
 
     def __init__(self):
         super(HasRawPredictionCol, self).__init__()
-        #: param for raw prediction (a.k.a. confidence) column name
-        self.rawPredictionCol = Param(self, "rawPredictionCol", "raw prediction (a.k.a. confidence) column name")
+        #: param for raw prediction (a.k.a. confidence) column name.
+        self.rawPredictionCol = Param(self, "rawPredictionCol", "raw prediction (a.k.a. confidence) column name.")
         self._setDefault(rawPredictionCol='rawPrediction')
 
     def setRawPredictionCol(self, value):
@@ -220,12 +220,12 @@ class HasInputCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    inputCol = Param(Params._dummy(), "inputCol", "input column name")
+    inputCol = Param(Params._dummy(), "inputCol", "input column name.")
 
     def __init__(self):
         super(HasInputCol, self).__init__()
-        #: param for input column name
-        self.inputCol = Param(self, "inputCol", "input column name")
+        #: param for input column name.
+        self.inputCol = Param(self, "inputCol", "input column name.")
 
     def setInputCol(self, value):
         """
@@ -247,12 +247,12 @@ class HasInputCols(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    inputCols = Param(Params._dummy(), "inputCols", "input column names")
+    inputCols = Param(Params._dummy(), "inputCols", "input column names.")
 
     def __init__(self):
         super(HasInputCols, self).__init__()
-        #: param for input column names
-        self.inputCols = Param(self, "inputCols", "input column names")
+        #: param for input column names.
+        self.inputCols = Param(self, "inputCols", "input column names.")
 
     def setInputCols(self, value):
         """
@@ -274,12 +274,12 @@ class HasOutputCol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    outputCol = Param(Params._dummy(), "outputCol", "output column name")
+    outputCol = Param(Params._dummy(), "outputCol", "output column name.")
 
     def __init__(self):
         super(HasOutputCol, self).__init__()
-        #: param for output column name
-        self.outputCol = Param(self, "outputCol", "output column name")
+        #: param for output column name.
+        self.outputCol = Param(self, "outputCol", "output column name.")
         self._setDefault(outputCol=self.uid + '__output')
 
     def setOutputCol(self, value):
@@ -302,12 +302,12 @@ class HasNumFeatures(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    numFeatures = Param(Params._dummy(), "numFeatures", "number of features")
+    numFeatures = Param(Params._dummy(), "numFeatures", "number of features.")
 
     def __init__(self):
         super(HasNumFeatures, self).__init__()
-        #: param for number of features
-        self.numFeatures = Param(self, "numFeatures", "number of features")
+        #: param for number of features.
+        self.numFeatures = Param(self, "numFeatures", "number of features.")
 
     def setNumFeatures(self, value):
         """
@@ -329,12 +329,12 @@ class HasCheckpointInterval(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    checkpointInterval = Param(Params._dummy(), "checkpointInterval", "checkpoint interval (>= 1)")
+    checkpointInterval = Param(Params._dummy(), "checkpointInterval", "checkpoint interval (>= 1).")
 
     def __init__(self):
         super(HasCheckpointInterval, self).__init__()
-        #: param for checkpoint interval (>= 1)
-        self.checkpointInterval = Param(self, "checkpointInterval", "checkpoint interval (>= 1)")
+        #: param for checkpoint interval (>= 1).
+        self.checkpointInterval = Param(self, "checkpointInterval", "checkpoint interval (>= 1).")
 
     def setCheckpointInterval(self, value):
         """
@@ -356,12 +356,12 @@ class HasSeed(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    seed = Param(Params._dummy(), "seed", "random seed")
+    seed = Param(Params._dummy(), "seed", "random seed.")
 
     def __init__(self):
         super(HasSeed, self).__init__()
-        #: param for random seed
-        self.seed = Param(self, "seed", "random seed")
+        #: param for random seed.
+        self.seed = Param(self, "seed", "random seed.")
         self._setDefault(seed=hash(type(self).__name__))
 
     def setSeed(self, value):
@@ -384,12 +384,12 @@ class HasTol(Params):
     """
 
     # a placeholder to make it appear in the generated doc
-    tol = Param(Params._dummy(), "tol", "the convergence tolerance for iterative algorithms")
+    tol = Param(Params._dummy(), "tol", "the convergence tolerance for iterative algorithms.")
 
     def __init__(self):
         super(HasTol, self).__init__()
-        #: param for the convergence tolerance for iterative algorithms
-        self.tol = Param(self, "tol", "the convergence tolerance for iterative algorithms")
+        #: param for the convergence tolerance for iterative algorithms.
+        self.tol = Param(self, "tol", "the convergence tolerance for iterative algorithms.")
 
     def setTol(self, value):
         """
@@ -407,7 +407,7 @@ def getTol(self):
 
 class HasStepSize(Params):
     """
-    Mixin for param stepSize: Step size to be used for each iteration of optimization..
+    Mixin for param stepSize: Step size to be used for each iteration of optimization.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -434,7 +434,7 @@ def getStepSize(self):
 
 class HasHandleInvalid(Params):
     """
-    Mixin for param handleInvalid: how to handle invalid entries. Options are skip (which will filter out rows with bad values), or error (which will throw an errror). More options may be added later..
+    Mixin for param handleInvalid: how to handle invalid entries. Options are skip (which will filter out rows with bad values), or error (which will throw an errror). More options may be added later.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -461,7 +461,7 @@ def getHandleInvalid(self):
 
 class HasElasticNetParam(Params):
     """
-    Mixin for param elasticNetParam: the ElasticNet mixing parameter, in range [0, 1]. For alpha = 0, the penalty is an L2 penalty. For alpha = 1, it is an L1 penalty..
+    Mixin for param elasticNetParam: the ElasticNet mixing parameter, in range [0, 1]. For alpha = 0, the penalty is an L2 penalty. For alpha = 1, it is an L1 penalty.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -489,7 +489,7 @@ def getElasticNetParam(self):
 
 class HasFitIntercept(Params):
     """
-    Mixin for param fitIntercept: whether to fit an intercept term..
+    Mixin for param fitIntercept: whether to fit an intercept term.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -517,7 +517,7 @@ def getFitIntercept(self):
 
 class HasStandardization(Params):
     """
-    Mixin for param standardization: whether to standardize the training features before fitting the model..
+    Mixin for param standardization: whether to standardize the training features before fitting the model.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -545,7 +545,7 @@ def getStandardization(self):
 
 class HasThresholds(Params):
     """
-    Mixin for param thresholds: Thresholds in multi-class classification to adjust the probability of predicting each class. Array must have length equal to the number of classes, with values >= 0. The class with largest value p/t is predicted, where p is the original probability of that class and t is the class' threshold..
+    Mixin for param thresholds: Thresholds in multi-class classification to adjust the probability of predicting each class. Array must have length equal to the number of classes, with values >= 0. The class with largest value p/t is predicted, where p is the original probability of that class and t is the class' threshold.
     """
 
     # a placeholder to make it appear in the generated doc
@@ -572,7 +572,7 @@ def getThresholds(self):
 
 class HasWeightCol(Params):
     """
-    Mixin for param weightCol: weight column name. If this is not set or empty, we treat all instance weights as 1.0..
+    Mixin for param weightCol: weight column name. If this is not set or empty, we treat all instance weights as 1.0.
     """
 
     # a placeholder to make it appear in the generated doc
diff --git a/python/pyspark/ml/tests.py b/python/pyspark/ml/tests.py
index 648fa8858fba..6a2577d66f28 100644
--- a/python/pyspark/ml/tests.py
+++ b/python/pyspark/ml/tests.py
@@ -163,7 +163,7 @@ def test_param(self):
         testParams = TestParams()
         maxIter = testParams.maxIter
         self.assertEqual(maxIter.name, "maxIter")
-        self.assertEqual(maxIter.doc, "max number of iterations (>= 0)")
+        self.assertEqual(maxIter.doc, "max number of iterations (>= 0).")
         self.assertTrue(maxIter.parent == testParams.uid)
 
     def test_params(self):
@@ -197,9 +197,9 @@ def test_params(self):
 
         self.assertEqual(
             testParams.explainParams(),
-            "\n".join(["inputCol: input column name (undefined)",
-                       "maxIter: max number of iterations (>= 0) (default: 10, current: 100)",
-                       "seed: random seed (default: 41, current: 43)"]))
+            "\n".join(["inputCol: input column name. (undefined)",
+                       "maxIter: max number of iterations (>= 0). (default: 10, current: 100)",
+                       "seed: random seed. (default: 41, current: 43)"]))
 
     def test_hasseed(self):
         noSeedSpecd = TestParams()

From 89e6db6150704deab46232352d1986bc1449883b Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Wed, 21 Oct 2015 09:02:20 +0800
Subject: [PATCH 307/896] [SPARK-11153][SQL] Disables Parquet filter push-down
 for string and binary columns

Due to PARQUET-251, `BINARY` columns in existing Parquet files may be written with corrupted statistics information. This information is used by filter push-down optimization. Since Spark 1.5 turns on Parquet filter push-down by default, we may end up with wrong query results. PARQUET-251 has been fixed in parquet-mr 1.8.1, but Spark 1.5 is still using 1.7.0.

This affects all Spark SQL data types that can be mapped to Parquet {{BINARY}}, namely:

- `StringType`

- `BinaryType`

- `DecimalType`

  (But Spark SQL doesn't support pushing down filters involving `DecimalType` columns for now.)

To avoid wrong query results, we should disable filter push-down for columns of `StringType` and `BinaryType` until we upgrade to parquet-mr 1.8.

Author: Cheng Lian <lian@databricks.com>

Closes #9152 from liancheng/spark-11153.workaround-parquet-251.

(cherry picked from commit 0887e5e87891e8e22f534ca6d0406daf86ec2dad)
Signed-off-by: Cheng Lian <lian@databricks.com>
---
 .../datasources/parquet/ParquetFilters.scala  | 27 +++++++++++++++++++
 .../parquet/ParquetFilterSuite.scala          |  6 +++--
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
index 78040d99fb0a..07714329370a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilters.scala
@@ -53,6 +53,8 @@ private[sql] object ParquetFilters {
     case DoubleType =>
       (n: String, v: Any) => FilterApi.eq(doubleColumn(n), v.asInstanceOf[java.lang.Double])
 
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     // Binary.fromString and Binary.fromByteArray don't accept null values
     case StringType =>
       (n: String, v: Any) => FilterApi.eq(
@@ -62,6 +64,7 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.eq(
         binaryColumn(n),
         Option(v).map(b => Binary.fromByteArray(v.asInstanceOf[Array[Byte]])).orNull)
+     */
   }
 
   private val makeNotEq: PartialFunction[DataType, (String, Any) => FilterPredicate] = {
@@ -75,6 +78,9 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.notEq(floatColumn(n), v.asInstanceOf[java.lang.Float])
     case DoubleType =>
       (n: String, v: Any) => FilterApi.notEq(doubleColumn(n), v.asInstanceOf[java.lang.Double])
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Any) => FilterApi.notEq(
         binaryColumn(n),
@@ -83,6 +89,7 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.notEq(
         binaryColumn(n),
         Option(v).map(b => Binary.fromByteArray(v.asInstanceOf[Array[Byte]])).orNull)
+     */
   }
 
   private val makeLt: PartialFunction[DataType, (String, Any) => FilterPredicate] = {
@@ -94,6 +101,9 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.lt(floatColumn(n), v.asInstanceOf[java.lang.Float])
     case DoubleType =>
       (n: String, v: Any) => FilterApi.lt(doubleColumn(n), v.asInstanceOf[java.lang.Double])
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Any) =>
         FilterApi.lt(binaryColumn(n),
@@ -101,6 +111,7 @@ private[sql] object ParquetFilters {
     case BinaryType =>
       (n: String, v: Any) =>
         FilterApi.lt(binaryColumn(n), Binary.fromByteArray(v.asInstanceOf[Array[Byte]]))
+     */
   }
 
   private val makeLtEq: PartialFunction[DataType, (String, Any) => FilterPredicate] = {
@@ -112,6 +123,9 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.ltEq(floatColumn(n), v.asInstanceOf[java.lang.Float])
     case DoubleType =>
       (n: String, v: Any) => FilterApi.ltEq(doubleColumn(n), v.asInstanceOf[java.lang.Double])
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Any) =>
         FilterApi.ltEq(binaryColumn(n),
@@ -119,6 +133,7 @@ private[sql] object ParquetFilters {
     case BinaryType =>
       (n: String, v: Any) =>
         FilterApi.ltEq(binaryColumn(n), Binary.fromByteArray(v.asInstanceOf[Array[Byte]]))
+     */
   }
 
   private val makeGt: PartialFunction[DataType, (String, Any) => FilterPredicate] = {
@@ -130,6 +145,9 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.gt(floatColumn(n), v.asInstanceOf[java.lang.Float])
     case DoubleType =>
       (n: String, v: Any) => FilterApi.gt(doubleColumn(n), v.asInstanceOf[java.lang.Double])
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Any) =>
         FilterApi.gt(binaryColumn(n),
@@ -137,6 +155,7 @@ private[sql] object ParquetFilters {
     case BinaryType =>
       (n: String, v: Any) =>
         FilterApi.gt(binaryColumn(n), Binary.fromByteArray(v.asInstanceOf[Array[Byte]]))
+     */
   }
 
   private val makeGtEq: PartialFunction[DataType, (String, Any) => FilterPredicate] = {
@@ -148,6 +167,9 @@ private[sql] object ParquetFilters {
       (n: String, v: Any) => FilterApi.gtEq(floatColumn(n), v.asInstanceOf[java.lang.Float])
     case DoubleType =>
       (n: String, v: Any) => FilterApi.gtEq(doubleColumn(n), v.asInstanceOf[java.lang.Double])
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Any) =>
         FilterApi.gtEq(binaryColumn(n),
@@ -155,6 +177,7 @@ private[sql] object ParquetFilters {
     case BinaryType =>
       (n: String, v: Any) =>
         FilterApi.gtEq(binaryColumn(n), Binary.fromByteArray(v.asInstanceOf[Array[Byte]]))
+     */
   }
 
   private val makeInSet: PartialFunction[DataType, (String, Set[Any]) => FilterPredicate] = {
@@ -170,6 +193,9 @@ private[sql] object ParquetFilters {
     case DoubleType =>
       (n: String, v: Set[Any]) =>
         FilterApi.userDefined(doubleColumn(n), SetInFilter(v.asInstanceOf[Set[java.lang.Double]]))
+
+    // See https://issues.apache.org/jira/browse/SPARK-11153
+    /*
     case StringType =>
       (n: String, v: Set[Any]) =>
         FilterApi.userDefined(binaryColumn(n),
@@ -178,6 +204,7 @@ private[sql] object ParquetFilters {
       (n: String, v: Set[Any]) =>
         FilterApi.userDefined(binaryColumn(n),
           SetInFilter(v.map(e => Binary.fromByteArray(e.asInstanceOf[Array[Byte]]))))
+     */
   }
 
   /**
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 7a23f57f4039..13fdd555a4c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -219,7 +219,8 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
     }
   }
 
-  test("filter pushdown - string") {
+  // See https://issues.apache.org/jira/browse/SPARK-11153
+  ignore("filter pushdown - string") {
     withParquetDataFrame((1 to 4).map(i => Tuple1(i.toString))) { implicit df =>
       checkFilterPredicate('_1.isNull, classOf[Eq[_]], Seq.empty[Row])
       checkFilterPredicate(
@@ -247,7 +248,8 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
     }
   }
 
-  test("filter pushdown - binary") {
+  // See https://issues.apache.org/jira/browse/SPARK-11153
+  ignore("filter pushdown - binary") {
     implicit class IntToBinary(int: Int) {
       def b: Array[Byte] = int.toString.getBytes("UTF-8")
     }

From 45861693bef2619196f0fbdf5c166ad3f9b1e8d1 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 20 Oct 2015 18:37:29 -0700
Subject: [PATCH 308/896] [SPARK-10082][MLLIB] minor style updates for matrix
 indexing after #8271

* `>=0` => `>= 0`
* print `i`, `j` in the log message

MechCoder

Author: Xiangrui Meng <meng@databricks.com>

Closes #9189 from mengxr/SPARK-10082.
---
 .../scala/org/apache/spark/mllib/linalg/Matrices.scala    | 8 ++++----
 .../org/apache/spark/mllib/linalg/MatricesSuite.scala     | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
index cfed9ad0730b..8ba6e4e78d96 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
@@ -296,8 +296,8 @@ class DenseMatrix @Since("1.3.0") (
   override def apply(i: Int, j: Int): Double = values(index(i, j))
 
   private[mllib] def index(i: Int, j: Int): Int = {
-    require(i < numRows && i >=0, s"Expected 0 <= i < $numRows, got $i")
-    require(j < numCols && j >=0, s"Expected 0 <= j < $numCols, got $j")
+    require(i >= 0 && i < numRows, s"Expected 0 <= i < $numRows, got i = $i.")
+    require(j >= 0 && j < numCols, s"Expected 0 <= j < $numCols, got j = $j.")
     if (!isTransposed) i + numRows * j else j + numCols * i
   }
 
@@ -572,8 +572,8 @@ class SparseMatrix @Since("1.3.0") (
   }
 
   private[mllib] def index(i: Int, j: Int): Int = {
-    require(i < numRows && i >=0, s"Expected 0 <= i < $numRows, got $i")
-    require(j < numCols && j >=0, s"Expected 0 <= j < $numCols, got $j")
+    require(i >= 0 && i < numRows, s"Expected 0 <= i < $numRows, got i = $i.")
+    require(j >= 0 && j < numCols, s"Expected 0 <= j < $numCols, got j = $j.")
     if (!isTransposed) {
       Arrays.binarySearch(rowIndices, colPtrs(j), colPtrs(j + 1), i)
     } else {
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
index b0071c9a028a..1833cf383367 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala
@@ -78,10 +78,10 @@ class MatricesSuite extends SparkFunSuite {
     val sm = Matrices.sparse(3, 2, Array(0, 2, 3), Array(1, 2, 1), Array(0.0, 1.0, 2.0))
     val dm = Matrices.dense(3, 2, Array(0.0, 2.3, 1.4, 3.2, 1.0, 9.1))
     Array(sm, dm).foreach { mat =>
-        intercept[IllegalArgumentException] { mat.index(4, 1) }
-        intercept[IllegalArgumentException] { mat.index(1, 4) }
-        intercept[IllegalArgumentException] { mat.index(-1, 2) }
-        intercept[IllegalArgumentException] { mat.index(1, -2) }
+      intercept[IllegalArgumentException] { mat.index(4, 1) }
+      intercept[IllegalArgumentException] { mat.index(1, 4) }
+      intercept[IllegalArgumentException] { mat.index(-1, 2) }
+      intercept[IllegalArgumentException] { mat.index(1, -2) }
     }
   }
 

From 135ade905089fe90d3cc9e84f8fedc7637e901d8 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 20 Oct 2015 18:38:06 -0700
Subject: [PATCH 309/896] [MINOR][ML] fix doc warnings

Without an empty line, sphinx will treat doctest as docstring. holdenk

~~~
/Users/meng/src/spark/python/pyspark/ml/feature.py:docstring of pyspark.ml.feature.CountVectorizer:3: ERROR: Undefined substitution referenced: "label|raw |vectors | +-----+---------------+-------------------------+ |0 |[a, b, c] |(3,[0,1,2],[1.0,1.0,1.0])".
/Users/meng/src/spark/python/pyspark/ml/feature.py:docstring of pyspark.ml.feature.CountVectorizer:3: ERROR: Undefined substitution referenced: "1 |[a, b, b, c, a]|(3,[0,1,2],[2.0,2.0,1.0])".
~~~

Author: Xiangrui Meng <meng@databricks.com>

Closes #9188 from mengxr/py-count-vec-doc-fix.
---
 python/pyspark/ml/feature.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/python/pyspark/ml/feature.py b/python/pyspark/ml/feature.py
index a4e60f916b5c..55bde6d0ea4f 100644
--- a/python/pyspark/ml/feature.py
+++ b/python/pyspark/ml/feature.py
@@ -178,6 +178,7 @@ class CountVectorizer(JavaEstimator, HasInputCol, HasOutputCol):
     .. note:: Experimental
 
     Extracts a vocabulary from document collections and generates a :py:attr:`CountVectorizerModel`.
+
     >>> df = sqlContext.createDataFrame(
     ...    [(0, ["a", "b", "c"]), (1, ["a", "b", "b", "c", "a"])],
     ...    ["label", "raw"])

From 1107bd958aefc793d6e8e369ad6268b24a0f8510 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Tue, 20 Oct 2015 21:40:22 -0700
Subject: [PATCH 310/896] [SPARK-11221][SPARKR] fix R doc for lit and add
 examples

Currently the documentation for `lit` is inconsistent with doc format, references "Scala symbol" and has no example. Fixing that.
shivaram

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9187 from felixcheung/rlit.
---
 R/pkg/R/functions.R | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index a220ad8b9f58..a72fb7bb42fe 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -18,16 +18,21 @@
 #' @include generics.R column.R
 NULL
 
-#' Creates a \code{Column} of literal value.
+#' lit
 #'
-#' The passed in object is returned directly if it is already a \linkS4class{Column}.
-#' If the object is a Scala Symbol, it is converted into a \linkS4class{Column} also.
-#' Otherwise, a new \linkS4class{Column} is created to represent the literal value.
+#' A new \linkS4class{Column} is created to represent the literal value.
+#' If the parameter is a \linkS4class{Column}, it is returned unchanged.
 #'
 #' @family normal_funcs
 #' @rdname lit
 #' @name lit
 #' @export
+#' @examples
+#' \dontrun{
+#' lit(df$name)
+#' select(df, lit("x"))
+#' select(df, lit("2015-01-01"))
+#'}
 setMethod("lit", signature("ANY"),
           function(x) {
             jc <- callJStatic("org.apache.spark.sql.functions",

From 5cdea7d1e54e751f928876ead33fc01e7e2f3437 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Tue, 20 Oct 2015 23:58:27 -0700
Subject: [PATCH 311/896] =?UTF-8?q?[SPARK-11205][PYSPARK]=20Delegate=20to?=
 =?UTF-8?q?=20scala=20DataFrame=20API=20rather=20than=20p=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…rint in python

No test needed. Verify it manually in pyspark shell

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9177 from zjffdu/SPARK-11205.
---
 python/pyspark/sql/dataframe.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 033b31983ffa..36fc6e0611dc 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -212,6 +212,7 @@ def explain(self, extended=False):
         :param extended: boolean, default ``False``. If ``False``, prints only the physical plan.
 
         >>> df.explain()
+        == Physical Plan ==
         Scan PhysicalRDD[age#0,name#1]
 
         >>> df.explain(True)
@@ -227,7 +228,7 @@ def explain(self, extended=False):
         if extended:
             print(self._jdf.queryExecution().toString())
         else:
-            print(self._jdf.queryExecution().executedPlan().toString())
+            print(self._jdf.queryExecution().simpleString())
 
     @since(1.3)
     def isLocal(self):

From 8e82e59834aefb74d49e45c9c9c926bb53143b4c Mon Sep 17 00:00:00 2001
From: Pravin Gadakh <prgadakh@in.ibm.com>
Date: Wed, 21 Oct 2015 10:35:09 -0700
Subject: [PATCH 312/896] [SPARK-11037][SQL] using Option instead of Some in
 JdbcDialects

Using Option instead of Some in getCatalystType method.

Author: Pravin Gadakh <prgadakh@in.ibm.com>

Closes #9195 from pravingadakh/master.
---
 .../org/apache/spark/sql/jdbc/JdbcDialects.scala | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index a2ff4cc1c91f..88ae83957a70 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -198,15 +198,15 @@ case object PostgresDialect extends JdbcDialect {
   override def getCatalystType(
       sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
     if (sqlType == Types.BIT && typeName.equals("bit") && size != 1) {
-      Some(BinaryType)
+      Option(BinaryType)
     } else if (sqlType == Types.OTHER && typeName.equals("cidr")) {
-      Some(StringType)
+      Option(StringType)
     } else if (sqlType == Types.OTHER && typeName.equals("inet")) {
-      Some(StringType)
+      Option(StringType)
     } else if (sqlType == Types.OTHER && typeName.equals("json")) {
-      Some(StringType)
+      Option(StringType)
     } else if (sqlType == Types.OTHER && typeName.equals("jsonb")) {
-      Some(StringType)
+      Option(StringType)
     } else None
   }
 
@@ -236,9 +236,9 @@ case object MySQLDialect extends JdbcDialect {
       // This could instead be a BinaryType if we'd rather return bit-vectors of up to 64 bits as
       // byte arrays instead of longs.
       md.putLong("binarylong", 1)
-      Some(LongType)
+      Option(LongType)
     } else if (sqlType == Types.BIT && typeName.equals("TINYINT")) {
-      Some(BooleanType)
+      Option(BooleanType)
     } else None
   }
 
@@ -279,7 +279,7 @@ case object MsSqlServerDialect extends JdbcDialect {
       sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
     if (typeName.contains("datetimeoffset")) {
       // String is recommend by Microsoft SQL Server for datetimeoffset types in non-MS clients
-      Some(StringType)
+      Option(StringType)
     } else None
   }
 

From f62e3260889d67256d335fd0dd38f114ae4e3eca Mon Sep 17 00:00:00 2001
From: nitin goyal <nitin.goyal@guavus.com>
Date: Wed, 21 Oct 2015 10:45:21 -0700
Subject: [PATCH 313/896] [SPARK-11179] [SQL] Push filters through aggregate

Push conjunctive predicates though Aggregate operators when their references are a subset of the groupingExpressions.

Query plan before optimisation :-
Filter ((c#138L = 2) && (a#0 = 3))
 Aggregate [a#0], [a#0,count(b#1) AS c#138L]
  Project [a#0,b#1]
   LocalRelation [a#0,b#1,c#2]

Query plan after optimisation :-
Filter (c#138L = 2)
 Aggregate [a#0], [a#0,count(b#1) AS c#138L]
  Filter (a#0 = 3)
   Project [a#0,b#1]
    LocalRelation [a#0,b#1,c#2]

Author: nitin goyal <nitin.goyal@guavus.com>
Author: nitin.goyal <nitin.goyal@guavus.com>

Closes #9167 from nitin2goyal/master.
---
 .../sql/catalyst/optimizer/Optimizer.scala    | 24 ++++++++++
 .../optimizer/FilterPushdownSuite.scala       | 45 +++++++++++++++++++
 2 files changed, 69 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 6557c7005d1e..0139b9e87ce8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -46,6 +46,7 @@ object DefaultOptimizer extends Optimizer {
       PushPredicateThroughJoin,
       PushPredicateThroughProject,
       PushPredicateThroughGenerate,
+      PushPredicateThroughAggregate,
       ColumnPruning,
       // Operator combine
       ProjectCollapsing,
@@ -674,6 +675,29 @@ object PushPredicateThroughGenerate extends Rule[LogicalPlan] with PredicateHelp
   }
 }
 
+/**
+ * Push [[Filter]] operators through [[Aggregate]] operators. Parts of the predicate that reference
+ * attributes which are subset of group by attribute set of [[Aggregate]] will be pushed beneath,
+ * and the rest should remain above.
+ */
+object PushPredicateThroughAggregate extends Rule[LogicalPlan] with PredicateHelper {
+
+  def apply(plan: LogicalPlan): LogicalPlan = plan transform {
+    case filter @ Filter(condition,
+        aggregate @ Aggregate(groupingExpressions, aggregateExpressions, grandChild)) =>
+      val (pushDown, stayUp) = splitConjunctivePredicates(condition).partition {
+        conjunct => conjunct.references subsetOf AttributeSet(groupingExpressions)
+      }
+      if (pushDown.nonEmpty) {
+        val pushDownPredicate = pushDown.reduce(And)
+        val withPushdown = aggregate.copy(child = Filter(pushDownPredicate, grandChild))
+        stayUp.reduceOption(And).map(Filter(_, withPushdown)).getOrElse(withPushdown)
+      } else {
+        filter
+      }
+  }
+}
+
 /**
  * Pushes down [[Filter]] operators where the `condition` can be
  * evaluated using only the attributes of the left or right side of a join.  Other
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
index 0f1fde2fb0f6..ed810a12808f 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
@@ -40,6 +40,7 @@ class FilterPushdownSuite extends PlanTest {
         BooleanSimplification,
         PushPredicateThroughJoin,
         PushPredicateThroughGenerate,
+        PushPredicateThroughAggregate,
         ColumnPruning,
         ProjectCollapsing) :: Nil
   }
@@ -652,4 +653,48 @@ class FilterPushdownSuite extends PlanTest {
 
     comparePlans(optimized, correctAnswer.analyze)
   }
+
+  test("aggregate: push down filter when filter on group by expression") {
+    val originalQuery = testRelation
+                        .groupBy('a)('a, Count('b) as 'c)
+                        .select('a, 'c)
+                        .where('a === 2)
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+
+    val correctAnswer = testRelation
+                        .where('a === 2)
+                        .groupBy('a)('a, Count('b) as 'c)
+                        .analyze
+    comparePlans(optimized, correctAnswer)
+  }
+
+  test("aggregate: don't push down filter when filter not on group by expression") {
+    val originalQuery = testRelation
+                        .select('a, 'b)
+                        .groupBy('a)('a, Count('b) as 'c)
+                        .where('c === 2L)
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+
+    comparePlans(optimized, originalQuery.analyze)
+  }
+
+  test("aggregate: push down filters partially which are subset of group by expressions") {
+    val originalQuery = testRelation
+                        .select('a, 'b)
+                        .groupBy('a)('a, Count('b) as 'c)
+                        .where('c === 2L && 'a === 3)
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+
+    val correctAnswer = testRelation
+                        .select('a, 'b)
+                        .where('a === 3)
+                        .groupBy('a)('a, Count('b) as 'c)
+                        .where('c === 2L)
+                        .analyze
+
+    comparePlans(optimized, correctAnswer)
+  }
 }

From ccf536f903ef1f81fb3e1b6ce781d5e40d0ae3e0 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 21 Oct 2015 11:06:34 -0700
Subject: [PATCH 314/896] [SPARK-11216] [SQL] add encoder/decoder for external
 row

Implement encode/decode for external row based on `ClassEncoder`.

TODO:
* code cleanup
* ~~fix corner cases~~
* refactor the encoder interface
* improve test for product codegen, to cover more corner cases.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9184 from cloud-fan/encoder.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |   6 +-
 .../sql/catalyst/encoders/ClassEncoder.scala  |  75 ++++++
 .../spark/sql/catalyst/encoders/Encoder.scala |   2 +-
 .../catalyst/encoders/ProductEncoder.scala    |  46 +---
 .../sql/catalyst/encoders/RowEncoder.scala    | 234 ++++++++++++++++++
 .../sql/catalyst/expressions/objects.scala    |  46 +++-
 .../spark/sql/types/ArrayBasedMapData.scala   |   4 +
 .../spark/sql/RandomDataGenerator.scala       |   4 +-
 .../catalyst/encoders/RowEncoderSuite.scala   |  96 +++++++
 9 files changed, 459 insertions(+), 54 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 8edd6498e516..27c96f41221a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -19,11 +19,11 @@ package org.apache.spark.sql.catalyst
 
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedExtractValue, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
-import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.util.Utils
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
 import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.util.Utils
 
 /**
  * A default version of ScalaReflection that uses the runtime universe.
@@ -142,7 +142,7 @@ trait ScalaReflection {
   }
 
   /**
-   * Returns an expression that can be used to construct an object of type `T` given a an input
+   * Returns an expression that can be used to construct an object of type `T` given an input
    * row with a compatible schema.  Fields of the row will be extracted using UnresolvedAttributes
    * of the same name as the constructor arguments.  Nested classes will have their fields accessed
    * using UnresolvedExtractValue.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
new file mode 100644
index 000000000000..f3a106387177
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
+import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
+import org.apache.spark.sql.types.{ObjectType, StructType}
+
+/**
+ * A generic encoder for JVM objects.
+ *
+ * @param schema The schema after converting `T` to a Spark SQL row.
+ * @param extractExpressions A set of expressions, one for each top-level field that can be used to
+ *                           extract the values from a raw object.
+ * @param clsTag A classtag for `T`.
+ */
+case class ClassEncoder[T](
+    schema: StructType,
+    extractExpressions: Seq[Expression],
+    constructExpression: Expression,
+    clsTag: ClassTag[T])
+  extends Encoder[T] {
+
+  private val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
+  private val inputRow = new GenericMutableRow(1)
+
+  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
+  private val dataType = ObjectType(clsTag.runtimeClass)
+
+  override def toRow(t: T): InternalRow = {
+    if (t == null) {
+      null
+    } else {
+      inputRow(0) = t
+      extractProjection(inputRow)
+    }
+  }
+
+  override def fromRow(row: InternalRow): T = {
+    if (row eq null) {
+      null.asInstanceOf[T]
+    } else {
+      constructProjection(row).get(0, dataType).asInstanceOf[T]
+    }
+  }
+
+  override def bind(schema: Seq[Attribute]): ClassEncoder[T] = {
+    val plan = Project(Alias(constructExpression, "object")() :: Nil, LocalRelation(schema))
+    val analyzedPlan = SimpleAnalyzer.execute(plan)
+    val resolvedExpression = analyzedPlan.expressions.head.children.head
+    val boundExpression = BindReferences.bindReference(resolvedExpression, schema)
+
+    copy(constructExpression = boundExpression)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index 3618247d5d51..bdb1c0959da8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -46,7 +46,7 @@ trait Encoder[T] {
 
   /**
    * Returns an object of type `T`, extracting the required values from the provided row.  Note that
-   * you must bind` and encoder to a specific schema before you can call this function.
+   * you must bind the encoder to a specific schema before you can call this function.
    */
   def fromRow(row: InternalRow): T
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
index b0381880c3bd..4f7ce455ada9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -17,15 +17,11 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
-import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
-
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.{typeTag, TypeTag}
 
-import org.apache.spark.sql.catalyst.{ScalaReflection, InternalRow}
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.ScalaReflection
 import org.apache.spark.sql.types.{ObjectType, StructType}
 
 /**
@@ -44,44 +40,6 @@ object ProductEncoder {
     val constructExpression = ScalaReflection.constructorFor[T]
     new ClassEncoder[T](schema, extractExpressions, constructExpression, ClassTag[T](cls))
   }
-}
-
-/**
- * A generic encoder for JVM objects.
- *
- * @param schema The schema after converting `T` to a Spark SQL row.
- * @param extractExpressions A set of expressions, one for each top-level field that can be used to
- *                           extract the values from a raw object.
- * @param clsTag A classtag for `T`.
- */
-case class ClassEncoder[T](
-    schema: StructType,
-    extractExpressions: Seq[Expression],
-    constructExpression: Expression,
-    clsTag: ClassTag[T])
-  extends Encoder[T] {
 
-  private val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
-  private val inputRow = new GenericMutableRow(1)
 
-  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
-  private val dataType = ObjectType(clsTag.runtimeClass)
-
-  override def toRow(t: T): InternalRow = {
-    inputRow(0) = t
-    extractProjection(inputRow)
-  }
-
-  override def fromRow(row: InternalRow): T = {
-    constructProjection(row).get(0, dataType).asInstanceOf[T]
-  }
-
-  override def bind(schema: Seq[Attribute]): ClassEncoder[T] = {
-    val plan = Project(Alias(constructExpression, "object")() :: Nil, LocalRelation(schema))
-    val analyzedPlan = SimpleAnalyzer.execute(plan)
-    val resolvedExpression = analyzedPlan.expressions.head.children.head
-    val boundExpression = BindReferences.bindReference(resolvedExpression, schema)
-
-    copy(constructExpression = boundExpression)
-  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
new file mode 100644
index 000000000000..3e74aabd078d
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -0,0 +1,234 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.collection.Map
+import scala.reflect.ClassTag
+
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.UTF8String
+
+object RowEncoder {
+
+  def apply(schema: StructType): ClassEncoder[Row] = {
+    val cls = classOf[Row]
+    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
+    val extractExpressions = extractorsFor(inputObject, schema)
+    val constructExpression = constructorFor(schema)
+    new ClassEncoder[Row](
+      schema,
+      extractExpressions.asInstanceOf[CreateStruct].children,
+      constructExpression,
+      ClassTag(cls))
+  }
+
+  private def extractorsFor(
+      inputObject: Expression,
+      inputType: DataType): Expression = inputType match {
+    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+         FloatType | DoubleType | BinaryType => inputObject
+
+    case TimestampType =>
+      StaticInvoke(
+        DateTimeUtils,
+        TimestampType,
+        "fromJavaTimestamp",
+        inputObject :: Nil)
+
+    case DateType =>
+      StaticInvoke(
+        DateTimeUtils,
+        DateType,
+        "fromJavaDate",
+        inputObject :: Nil)
+
+    case _: DecimalType =>
+      StaticInvoke(
+        Decimal,
+        DecimalType.SYSTEM_DEFAULT,
+        "apply",
+        inputObject :: Nil)
+
+    case StringType =>
+      StaticInvoke(
+        classOf[UTF8String],
+        StringType,
+        "fromString",
+        inputObject :: Nil)
+
+    case t @ ArrayType(et, _) => et match {
+      case BooleanType | ByteType | ShortType | IntegerType | LongType | FloatType | DoubleType =>
+        NewInstance(
+          classOf[GenericArrayData],
+          inputObject :: Nil,
+          dataType = t)
+      case _ => MapObjects(extractorsFor(_, et), inputObject, externalDataTypeFor(et))
+    }
+
+    case t @ MapType(kt, vt, valueNullable) =>
+      val keys =
+        Invoke(
+          Invoke(inputObject, "keysIterator", ObjectType(classOf[scala.collection.Iterator[_]])),
+          "toSeq",
+          ObjectType(classOf[scala.collection.Seq[_]]))
+      val convertedKeys = extractorsFor(keys, ArrayType(kt, false))
+
+      val values =
+        Invoke(
+          Invoke(inputObject, "valuesIterator", ObjectType(classOf[scala.collection.Iterator[_]])),
+          "toSeq",
+          ObjectType(classOf[scala.collection.Seq[_]]))
+      val convertedValues = extractorsFor(values, ArrayType(vt, valueNullable))
+
+      NewInstance(
+        classOf[ArrayBasedMapData],
+        convertedKeys :: convertedValues :: Nil,
+        dataType = t)
+
+    case StructType(fields) =>
+      val convertedFields = fields.zipWithIndex.map { case (f, i) =>
+        If(
+          Invoke(inputObject, "isNullAt", BooleanType, Literal(i) :: Nil),
+          Literal.create(null, f.dataType),
+          extractorsFor(
+            Invoke(inputObject, "get", externalDataTypeFor(f.dataType), Literal(i) :: Nil),
+            f.dataType))
+      }
+      CreateStruct(convertedFields)
+  }
+
+  private def externalDataTypeFor(dt: DataType): DataType = dt match {
+    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+         FloatType | DoubleType | BinaryType => dt
+    case TimestampType => ObjectType(classOf[java.sql.Timestamp])
+    case DateType => ObjectType(classOf[java.sql.Date])
+    case _: DecimalType => ObjectType(classOf[java.math.BigDecimal])
+    case StringType => ObjectType(classOf[java.lang.String])
+    case _: ArrayType => ObjectType(classOf[scala.collection.Seq[_]])
+    case _: MapType => ObjectType(classOf[scala.collection.Map[_, _]])
+    case _: StructType => ObjectType(classOf[Row])
+  }
+
+  private def constructorFor(schema: StructType): Expression = {
+    val fields = schema.zipWithIndex.map { case (f, i) =>
+      val field = BoundReference(i, f.dataType, f.nullable)
+      If(
+        IsNull(field),
+        Literal.create(null, externalDataTypeFor(f.dataType)),
+        constructorFor(BoundReference(i, f.dataType, f.nullable), f.dataType)
+      )
+    }
+    CreateRow(fields)
+  }
+
+  private def constructorFor(input: Expression, dataType: DataType): Expression = dataType match {
+    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+         FloatType | DoubleType | BinaryType => input
+
+    case TimestampType =>
+      StaticInvoke(
+        DateTimeUtils,
+        ObjectType(classOf[java.sql.Timestamp]),
+        "toJavaTimestamp",
+        input :: Nil)
+
+    case DateType =>
+      StaticInvoke(
+        DateTimeUtils,
+        ObjectType(classOf[java.sql.Date]),
+        "toJavaDate",
+        input :: Nil)
+
+    case _: DecimalType =>
+      Invoke(input, "toJavaBigDecimal", ObjectType(classOf[java.math.BigDecimal]))
+
+    case StringType =>
+      Invoke(input, "toString", ObjectType(classOf[String]))
+
+    case ArrayType(et, nullable) =>
+      val arrayData =
+        Invoke(
+          MapObjects(constructorFor(_, et), input, et),
+          "array",
+          ObjectType(classOf[Array[_]]))
+      StaticInvoke(
+        scala.collection.mutable.WrappedArray,
+        ObjectType(classOf[Seq[_]]),
+        "make",
+        arrayData :: Nil)
+
+    case MapType(kt, vt, valueNullable) =>
+      val keyArrayType = ArrayType(kt, false)
+      val keyData = constructorFor(Invoke(input, "keyArray", keyArrayType), keyArrayType)
+
+      val valueArrayType = ArrayType(vt, valueNullable)
+      val valueData = constructorFor(Invoke(input, "valueArray", valueArrayType), valueArrayType)
+
+      StaticInvoke(
+        ArrayBasedMapData,
+        ObjectType(classOf[Map[_, _]]),
+        "toScalaMap",
+        keyData :: valueData :: Nil)
+
+    case StructType(fields) =>
+      val convertedFields = fields.zipWithIndex.map { case (f, i) =>
+        If(
+          Invoke(input, "isNullAt", BooleanType, Literal(i) :: Nil),
+          Literal.create(null, externalDataTypeFor(f.dataType)),
+          constructorFor(getField(input, i, f.dataType), f.dataType))
+      }
+      CreateRow(convertedFields)
+  }
+
+  private def getField(
+     row: Expression,
+     ordinal: Int,
+     dataType: DataType): Expression = dataType match {
+    case BooleanType =>
+      Invoke(row, "getBoolean", dataType, Literal(ordinal) :: Nil)
+    case ByteType =>
+      Invoke(row, "getByte", dataType, Literal(ordinal) :: Nil)
+    case ShortType =>
+      Invoke(row, "getShort", dataType, Literal(ordinal) :: Nil)
+    case IntegerType | DateType =>
+      Invoke(row, "getInt", dataType, Literal(ordinal) :: Nil)
+    case LongType | TimestampType =>
+      Invoke(row, "getLong", dataType, Literal(ordinal) :: Nil)
+    case FloatType =>
+      Invoke(row, "getFloat", dataType, Literal(ordinal) :: Nil)
+    case DoubleType =>
+      Invoke(row, "getDouble", dataType, Literal(ordinal) :: Nil)
+    case t: DecimalType =>
+      Invoke(row, "getDecimal", dataType, Seq(ordinal, t.precision, t.scale).map(Literal(_)))
+    case StringType =>
+      Invoke(row, "getUTF8String", dataType, Literal(ordinal) :: Nil)
+    case BinaryType =>
+      Invoke(row, "getBinary", dataType, Literal(ordinal) :: Nil)
+    case CalendarIntervalType =>
+      Invoke(row, "getInterval", dataType, Literal(ordinal) :: Nil)
+    case t: StructType =>
+      Invoke(row, "getStruct", dataType, Literal(ordinal) :: Literal(t.size) :: Nil)
+    case _: ArrayType =>
+      Invoke(row, "getArray", dataType, Literal(ordinal) :: Nil)
+    case _: MapType =>
+      Invoke(row, "getMap", dataType, Literal(ordinal) :: Nil)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index e8c1c93cf562..8fc00ad1bcb0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -17,12 +17,13 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
 
 import scala.language.existentials
 
-import org.apache.spark.sql.catalyst.{ScalaReflection, InternalRow}
+import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.types._
 
@@ -364,6 +365,10 @@ case class MapObjects(
       (".numElements()", (i: String) => s".getShort($i)", true)
     case ArrayType(BooleanType, _) =>
       (".numElements()", (i: String) => s".getBoolean($i)", true)
+    case ArrayType(StringType, _) =>
+      (".numElements()", (i: String) => s".getUTF8String($i)", false)
+    case ArrayType(_: MapType, _) =>
+      (".numElements()", (i: String) => s".getMap($i)", false)
   }
 
   override def nullable: Boolean = true
@@ -398,7 +403,7 @@ case class MapObjects(
     val convertedArray = ctx.freshName("convertedArray")
     val loopIndex = ctx.freshName("loopIndex")
 
-    val convertedType = ctx.javaType(boundFunction.dataType)
+    val convertedType = ctx.boxedType(boundFunction.dataType)
 
     // Because of the way Java defines nested arrays, we have to handle the syntax specially.
     // Specifically, we have to insert the [$dataLength] in between the type and any extra nested
@@ -434,9 +439,13 @@ case class MapObjects(
             ($elementJavaType)${genInputData.value}${itemAccessor(loopIndex)};
           $loopNullCheck
 
-          ${genFunction.code}
+          if ($loopIsNull) {
+            $convertedArray[$loopIndex] = null;
+          } else {
+            ${genFunction.code}
+            $convertedArray[$loopIndex] = ${genFunction.value};
+          }
 
-          $convertedArray[$loopIndex] = ($convertedType)${genFunction.value};
           $loopIndex += 1;
         }
 
@@ -446,3 +455,32 @@ case class MapObjects(
     """
   }
 }
+
+case class CreateRow(children: Seq[Expression]) extends Expression {
+  override def dataType: DataType = ObjectType(classOf[Row])
+
+  override def nullable: Boolean = false
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val rowClass = classOf[GenericRow].getName
+    val values = ctx.freshName("values")
+    s"""
+      boolean ${ev.isNull} = false;
+      final Object[] $values = new Object[${children.size}];
+    """ +
+      children.zipWithIndex.map { case (e, i) =>
+        val eval = e.gen(ctx)
+        eval.code + s"""
+          if (${eval.isNull}) {
+            $values[$i] = null;
+          } else {
+            $values[$i] = ${eval.value};
+          }
+         """
+      }.mkString("\n") +
+      s"final ${classOf[Row].getName} ${ev.value} = new $rowClass($values);"
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
index 5f22e59d5f1d..e5ffe3221735 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
@@ -66,4 +66,8 @@ object ArrayBasedMapData {
   def toScalaMap(keys: Array[Any], values: Array[Any]): Map[Any, Any] = {
     keys.zip(values).toMap
   }
+
+  def toScalaMap(keys: Seq[Any], values: Seq[Any]): Map[Any, Any] = {
+    keys.zip(values).toMap
+  }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
index e48395028e39..7614f055e9c0 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/RandomDataGenerator.scala
@@ -148,7 +148,7 @@ object RandomDataGenerator {
         () => BigDecimal.apply(
           rand.nextLong() % math.pow(10, precision).toLong,
           scale,
-          new MathContext(precision)))
+          new MathContext(precision)).bigDecimal)
       case DoubleType => randomNumeric[Double](
         rand, r => longBitsToDouble(r.nextLong()), Seq(Double.MinValue, Double.MinPositiveValue,
           Double.MaxValue, Double.PositiveInfinity, Double.NegativeInfinity, Double.NaN, 0.0))
@@ -166,7 +166,7 @@ object RandomDataGenerator {
       case NullType => Some(() => null)
       case ArrayType(elementType, containsNull) => {
         forType(elementType, nullable = containsNull, seed = Some(rand.nextLong())).map {
-          elementGenerator => () => Array.fill(rand.nextInt(MAX_ARR_SIZE))(elementGenerator())
+          elementGenerator => () => Seq.fill(rand.nextInt(MAX_ARR_SIZE))(elementGenerator())
         }
       }
       case MapType(keyType, valueType, valueContainsNull) => {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
new file mode 100644
index 000000000000..6041b62b74bd
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.{RandomDataGenerator, Row}
+import org.apache.spark.sql.types._
+import org.apache.spark.unsafe.types.UTF8String
+
+class RowEncoderSuite extends SparkFunSuite {
+
+  private val structOfString = new StructType().add("str", StringType)
+  private val arrayOfString = ArrayType(StringType)
+  private val mapOfString = MapType(StringType, StringType)
+
+  encodeDecodeTest(
+    new StructType()
+      .add("boolean", BooleanType)
+      .add("byte", ByteType)
+      .add("short", ShortType)
+      .add("int", IntegerType)
+      .add("long", LongType)
+      .add("float", FloatType)
+      .add("double", DoubleType)
+      .add("decimal", DecimalType.SYSTEM_DEFAULT)
+      .add("string", StringType)
+      .add("binary", BinaryType)
+      .add("date", DateType)
+      .add("timestamp", TimestampType))
+
+  encodeDecodeTest(
+    new StructType()
+      .add("arrayOfString", arrayOfString)
+      .add("arrayOfArrayOfString", ArrayType(arrayOfString))
+      .add("arrayOfArrayOfInt", ArrayType(ArrayType(IntegerType)))
+      .add("arrayOfMap", ArrayType(mapOfString))
+      .add("arrayOfStruct", ArrayType(structOfString)))
+
+  encodeDecodeTest(
+    new StructType()
+      .add("mapOfIntAndString", MapType(IntegerType, StringType))
+      .add("mapOfStringAndArray", MapType(StringType, arrayOfString))
+      .add("mapOfArrayAndInt", MapType(arrayOfString, IntegerType))
+      .add("mapOfArray", MapType(arrayOfString, arrayOfString))
+      .add("mapOfStringAndStruct", MapType(StringType, structOfString))
+      .add("mapOfStructAndString", MapType(structOfString, StringType))
+      .add("mapOfStruct", MapType(structOfString, structOfString)))
+
+  encodeDecodeTest(
+    new StructType()
+      .add("structOfString", structOfString)
+      .add("structOfStructOfString", new StructType().add("struct", structOfString))
+      .add("structOfArray", new StructType().add("array", arrayOfString))
+      .add("structOfMap", new StructType().add("map", mapOfString))
+      .add("structOfArrayAndMap",
+        new StructType().add("array", arrayOfString).add("map", mapOfString)))
+
+  private def encodeDecodeTest(schema: StructType): Unit = {
+    test(s"encode/decode: ${schema.simpleString}") {
+      val encoder = RowEncoder(schema)
+      val inputGenerator = RandomDataGenerator.forType(schema).get
+
+      var input: Row = null
+      try {
+        for (_ <- 1 to 5) {
+          input = inputGenerator.apply().asInstanceOf[Row]
+          val row = encoder.toRow(input)
+          val convertedBack = encoder.fromRow(row)
+          assert(input == convertedBack)
+        }
+      } catch {
+        case e: Exception =>
+          fail(
+            s"""
+               |schema: ${schema.simpleString}
+               |input: ${input}
+             """.stripMargin, e)
+      }
+    }
+  }
+}

From 49ea0e9d7ce805d312d94a5b2936eec2053bc052 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Wed, 21 Oct 2015 11:10:32 -0700
Subject: [PATCH 315/896] [SPARK-10534] [SQL] ORDER BY clause allows only
 columns that are present in the select projection list

Find out the missing attributes by recursively looking
at the sort order expression and rest of the code
takes care of projecting them out.

Added description from cloud-fan

I wanna explain a bit more about this bug.

When we resolve sort ordering, we will use a special method, which only resolves UnresolvedAttributes and UnresolvedExtractValue. However, for something like Floor('a), even the 'a is resolved, the floor expression may still being unresolved as data type mismatch(for example, 'a is string type and Floor need double type), thus can't pass this filter, and we can't push down this missing attribute 'a

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #9123 from dilipbiswal/SPARK-10534.
---
 .../apache/spark/sql/catalyst/analysis/Analyzer.scala  |  2 +-
 .../spark/sql/catalyst/analysis/AnalysisSuite.scala    | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index e6046055bf0f..9237f2f3ddb6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -482,7 +482,7 @@ class Analyzer(
       val newOrdering = resolveSortOrders(ordering, grandchild, throws = true)
       // Construct a set that contains all of the attributes that we need to evaluate the
       // ordering.
-      val requiredAttributes = AttributeSet(newOrdering.filter(_.resolved))
+      val requiredAttributes = AttributeSet(newOrdering).filter(_.resolved)
       // Figure out which ones are missing from the projection, so that we can add them and
       // remove them after the sort.
       val missingInProject = requiredAttributes -- child.output
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index ec05cfa63c5b..24af8483a7ec 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -143,4 +143,14 @@ class AnalysisSuite extends AnalysisTest {
     plan = testRelation.select(CreateStructUnsafe(Seq(a, (a + 1).as("a+1"))).as("col"))
     checkAnalysis(plan, plan)
   }
+
+  test("SPARK-10534: resolve attribute references in order by clause") {
+    val a = testRelation2.output(0)
+    val c = testRelation2.output(2)
+
+    val plan = testRelation2.select('c).orderBy(Floor('a).asc)
+    val expected = testRelation2.select(c, a).orderBy(Floor(a.cast(DoubleType)).asc).select(c)
+
+    checkAnalysis(plan, expected)
+  }
 }

From 7c74ebca05f40a2d8fe8f10f24a10486ce4f76c0 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <cloud0fan@163.com>
Date: Wed, 21 Oct 2015 13:22:35 -0700
Subject: [PATCH 316/896] [SPARK-10743][SQL] keep the name of expression if
 possible when do cast

Author: Wenchen Fan <cloud0fan@163.com>

Closes #8859 from cloud-fan/cast.
---
 .../sql/catalyst/analysis/Analyzer.scala      | 33 +++++++++----------
 .../scala/org/apache/spark/sql/Column.scala   |  4 +--
 .../spark/sql/ColumnExpressionSuite.scala     |  6 ----
 .../org/apache/spark/sql/DataFrameSuite.scala |  5 +++
 4 files changed, 23 insertions(+), 25 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 9237f2f3ddb6..016dc293f4f4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -141,32 +141,31 @@ class Analyzer(
    */
   object ResolveAliases extends Rule[LogicalPlan] {
     private def assignAliases(exprs: Seq[NamedExpression]) = {
-      // The `UnresolvedAlias`s will appear only at root of a expression tree, we don't need
-      // to traverse the whole tree.
       exprs.zipWithIndex.map {
-        case (u @ UnresolvedAlias(child), i) =>
-          child match {
-            case _: UnresolvedAttribute => u
-            case ne: NamedExpression => ne
-            case g: Generator if g.resolved && g.elementTypes.size > 1 => MultiAlias(g, Nil)
-            case e if !e.resolved => u
-            case other => Alias(other, s"_c$i")()
+        case (expr, i) =>
+          expr transform {
+            case u @ UnresolvedAlias(child) => child match {
+              case ne: NamedExpression => ne
+              case e if !e.resolved => u
+              case g: Generator if g.elementTypes.size > 1 => MultiAlias(g, Nil)
+              case c @ Cast(ne: NamedExpression, _) => Alias(c, ne.name)()
+              case other => Alias(other, s"_c$i")()
+            }
           }
-        case (other, _) => other
-      }
+      }.asInstanceOf[Seq[NamedExpression]]
     }
 
+    private def hasUnresolvedAlias(exprs: Seq[NamedExpression]) =
+      exprs.exists(_.find(_.isInstanceOf[UnresolvedAlias]).isDefined)
+
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
-      case Aggregate(groups, aggs, child)
-        if child.resolved && aggs.exists(_.isInstanceOf[UnresolvedAlias]) =>
+      case Aggregate(groups, aggs, child) if child.resolved && hasUnresolvedAlias(aggs) =>
         Aggregate(groups, assignAliases(aggs), child)
 
-      case g: GroupingAnalytics
-        if g.child.resolved && g.aggregations.exists(_.isInstanceOf[UnresolvedAlias]) =>
+      case g: GroupingAnalytics if g.child.resolved && hasUnresolvedAlias(g.aggregations) =>
         g.withNewAggs(assignAliases(g.aggregations))
 
-      case Project(projectList, child)
-        if child.resolved && projectList.exists(_.isInstanceOf[UnresolvedAlias]) =>
+      case Project(projectList, child) if child.resolved && hasUnresolvedAlias(projectList) =>
         Project(assignAliases(projectList), child)
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 1f826887ac77..37d559c8e430 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -835,8 +835,8 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @since 1.3.0
    */
   def cast(to: DataType): Column = expr match {
-    // Lift alias out of cast so we can support col.as("name").cast(IntegerType)
-    case Alias(childExpr, name) => Alias(Cast(childExpr, to), name)()
+    // keeps the name of expression if possible when do cast.
+    case ne: NamedExpression => UnresolvedAlias(Cast(expr, to))
     case _ => Cast(expr, to)
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
index 4e988f074b11..fa559c9c6400 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
@@ -588,12 +588,6 @@ class ColumnExpressionSuite extends QueryTest with SharedSQLContext {
     }
   }
 
-  test("lift alias out of cast") {
-    compareExpressions(
-      col("1234").as("name").cast("int").expr,
-      col("1234").cast("int").as("name").expr)
-  }
-
   test("columns can be compared") {
     assert('key.desc == 'key.desc)
     assert('key.desc != 'key.asc)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 832ea02cb6e7..6424f1f1d9cf 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -975,4 +975,9 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       expected(except)
     )
   }
+
+  test("SPARK-10743: keep the name of expression if possible when do cast") {
+    val df = (1 to 10).map(Tuple1.apply).toDF("i").as("src")
+    assert(df.select($"src.i".cast(StringType)).columns.head === "i")
+  }
 }

From f8c6bec65784de89b47e96a367d3f9790c1b3115 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 21 Oct 2015 13:38:30 -0700
Subject: [PATCH 317/896] [SPARK-11197][SQL] run SQL on files directly

This PR introduce a new feature to run SQL directly on files without create a table, for example:

```
select id from json.`path/to/json/files` as j
```

Author: Davies Liu <davies@databricks.com>

Closes #9173 from davies/source.
---
 R/pkg/inst/tests/test_sparkSQL.R              |  2 +-
 .../sql/catalyst/analysis/Analyzer.scala      | 10 +++++--
 .../sql/catalyst/analysis/CheckAnalysis.scala |  3 ++
 .../sql/catalyst/analysis/AnalysisSuite.scala |  2 +-
 .../scala/org/apache/spark/sql/SQLConf.scala  |  8 ++++++
 .../org/apache/spark/sql/SQLContext.scala     |  2 +-
 .../sql/execution/datasources/rules.scala     | 28 +++++++++++++++++--
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 28 +++++++++++++++++++
 .../apache/spark/sql/hive/HiveContext.scala   |  4 +--
 .../sql/hive/execution/SQLQuerySuite.scala    | 13 +++++++++
 10 files changed, 91 insertions(+), 9 deletions(-)

diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index e1b42b080493..67d8b23cd7b8 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1428,7 +1428,7 @@ test_that("sampleBy() on a DataFrame", {
 
 test_that("SQL error message is returned from JVM", {
   retError <- tryCatch(sql(sqlContext, "select * from blah"), error = function(e) e)
-  expect_equal(grepl("Table Not Found: blah", retError), TRUE)
+  expect_equal(grepl("Table not found: blah", retError), TRUE)
 })
 
 test_that("Method as.data.frame as a synonym for collect()", {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 016dc293f4f4..beabacfc88e3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -256,7 +256,7 @@ class Analyzer(
         catalog.lookupRelation(u.tableIdentifier, u.alias)
       } catch {
         case _: NoSuchTableException =>
-          u.failAnalysis(s"Table Not Found: ${u.tableName}")
+          u.failAnalysis(s"Table not found: ${u.tableName}")
       }
     }
 
@@ -264,7 +264,13 @@ class Analyzer(
       case i @ InsertIntoTable(u: UnresolvedRelation, _, _, _, _) =>
         i.copy(table = EliminateSubQueries(getTable(u)))
       case u: UnresolvedRelation =>
-        getTable(u)
+        try {
+          getTable(u)
+        } catch {
+          case _: AnalysisException if u.tableIdentifier.database.isDefined =>
+            // delay the exception into CheckAnalysis, then it could be resolved as data source.
+            u
+        }
     }
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
index 7701fd045104..ab215407f7da 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
@@ -49,6 +49,9 @@ trait CheckAnalysis {
     plan.foreachUp {
       case p if p.analyzed => // Skip already analyzed sub-plans
 
+      case u: UnresolvedRelation =>
+        u.failAnalysis(s"Table not found: ${u.tableIdentifier}")
+
       case operator: LogicalPlan =>
         operator transformExpressionsUp {
           case a: Attribute if !a.resolved =>
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 24af8483a7ec..0a1fa74bede7 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -78,7 +78,7 @@ class AnalysisSuite extends AnalysisTest {
 
   test("resolve relations") {
     assertAnalysisError(
-      UnresolvedRelation(TableIdentifier("tAbLe"), None), Seq("Table Not Found: tAbLe"))
+      UnresolvedRelation(TableIdentifier("tAbLe"), None), Seq("Table not found: tAbLe"))
 
     checkAnalysis(UnresolvedRelation(TableIdentifier("TaBlE"), None), testRelation)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index b08cc8e83073..6f2892085a8f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -432,6 +432,12 @@ private[spark] object SQLConf {
   val USE_SQL_AGGREGATE2 = booleanConf("spark.sql.useAggregate2",
     defaultValue = Some(true), doc = "<TODO>")
 
+  val RUN_SQL_ON_FILES = booleanConf("spark.sql.runSQLOnFiles",
+    defaultValue = Some(true),
+    isPublic = false,
+    doc = "When true, we could use `datasource`.`path` as table in SQL query"
+  )
+
   object Deprecated {
     val MAPRED_REDUCE_TASKS = "mapred.reduce.tasks"
     val EXTERNAL_SORT = "spark.sql.planner.externalSort"
@@ -540,6 +546,8 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def dataFrameRetainGroupColumns: Boolean = getConf(DATAFRAME_RETAIN_GROUP_COLUMNS)
 
+  private[spark] def runSQLOnFile: Boolean = getConf(RUN_SQL_ON_FILES)
+
   /** ********************** SQLConf functionality methods ************ */
 
   /** Set Spark SQL configuration properties. */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index e83657a60558..a107639947aa 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -193,7 +193,7 @@ class SQLContext private[sql](
       override val extendedResolutionRules =
         ExtractPythonUDFs ::
         PreInsertCastAndRename ::
-        Nil
+        (if (conf.runSQLOnFile) new ResolveDataSource(self) :: Nil else Nil)
 
       override val extendedCheckRules = Seq(
         datasources.PreWriteCheck(catalog)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
index b00e5680fef9..abc016bf020d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
@@ -17,13 +17,37 @@
 
 package org.apache.spark.sql.execution.datasources
 
-import org.apache.spark.sql.{AnalysisException, SaveMode}
-import org.apache.spark.sql.catalyst.analysis.{Catalog, EliminateSubQueries}
+import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions.{Alias, Attribute, Cast}
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.sql.sources.{BaseRelation, HadoopFsRelation, InsertableRelation}
+import org.apache.spark.sql.{AnalysisException, SQLContext, SaveMode}
+
+/**
+ * Try to replaces [[UnresolvedRelation]]s with [[ResolvedDataSource]].
+ */
+private[sql] class ResolveDataSource(sqlContext: SQLContext) extends Rule[LogicalPlan] {
+  def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
+    case u: UnresolvedRelation if u.tableIdentifier.database.isDefined =>
+      try {
+        val resolved = ResolvedDataSource(
+          sqlContext,
+          userSpecifiedSchema = None,
+          partitionColumns = Array(),
+          provider = u.tableIdentifier.database.get,
+          options = Map("path" -> u.tableIdentifier.table))
+        val plan = LogicalRelation(resolved.relation)
+        u.alias.map(a => Subquery(u.alias.get, plan)).getOrElse(plan)
+      } catch {
+        case e: ClassNotFoundException => u
+        case e: Exception =>
+          // the provider is valid, but failed to create a logical plan
+          u.failAnalysis(e.getMessage)
+      }
+  }
+}
 
 /**
  * A rule to do pre-insert data type casting and field renaming. Before we insert into
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index a35a7f41dd66..298c32290697 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1796,6 +1796,34 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     }
   }
 
+  test("run sql directly on files") {
+    val df = sqlContext.range(100)
+    withTempPath(f => {
+      df.write.json(f.getCanonicalPath)
+      checkAnswer(sql(s"select id from json.`${f.getCanonicalPath}`"),
+        df)
+      checkAnswer(sql(s"select id from `org.apache.spark.sql.json`.`${f.getCanonicalPath}`"),
+        df)
+      checkAnswer(sql(s"select a.id from json.`${f.getCanonicalPath}` as a"),
+        df)
+    })
+
+    val e1 = intercept[AnalysisException] {
+      sql("select * from in_valid_table")
+    }
+    assert(e1.message.contains("Table not found"))
+
+    val e2 = intercept[AnalysisException] {
+      sql("select * from no_db.no_table")
+    }
+    assert(e2.message.contains("Table not found"))
+
+    val e3 = intercept[AnalysisException] {
+      sql("select * from json.invalid_file")
+    }
+    assert(e3.message.contains("No input paths specified"))
+  }
+
   test("SortMergeJoin returns wrong results when using UnsafeRows") {
     // This test is for the fix of https://issues.apache.org/jira/browse/SPARK-10737.
     // This bug will be triggered when Tungsten is enabled and there are multiple
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 38c195bc7db0..61f611638fe9 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -45,7 +45,7 @@ import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
 import org.apache.spark.sql.catalyst.expressions.{Expression, LeafExpression}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.{InternalRow, ParserDialect, SqlParser}
-import org.apache.spark.sql.execution.datasources.{DataSourceStrategy, PreInsertCastAndRename, PreWriteCheck}
+import org.apache.spark.sql.execution.datasources.{ResolveDataSource, DataSourceStrategy, PreInsertCastAndRename, PreWriteCheck}
 import org.apache.spark.sql.execution.ui.SQLListener
 import org.apache.spark.sql.execution.{CacheManager, ExecutedCommand, ExtractPythonUDFs, SetCommand}
 import org.apache.spark.sql.hive.client._
@@ -473,7 +473,7 @@ class HiveContext private[hive](
         ExtractPythonUDFs ::
         ResolveHiveWindowFunction ::
         PreInsertCastAndRename ::
-        Nil
+        (if (conf.runSQLOnFile) new ResolveDataSource(self) :: Nil else Nil)
 
       override val extendedCheckRules = Seq(
         PreWriteCheck(catalog)
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index c929ba50680b..396150be76e8 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1281,6 +1281,19 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
     }
   }
 
+  test("run sql directly on files") {
+    val df = sqlContext.range(100)
+    withTempPath(f => {
+      df.write.parquet(f.getCanonicalPath)
+      checkAnswer(sql(s"select id from parquet.`${f.getCanonicalPath}`"),
+        df)
+      checkAnswer(sql(s"select id from `org.apache.spark.sql.parquet`.`${f.getCanonicalPath}`"),
+        df)
+      checkAnswer(sql(s"select a.id from parquet.`${f.getCanonicalPath}` as a"),
+        df)
+    })
+  }
+
   test("correctly parse CREATE VIEW statement") {
     withSQLConf(SQLConf.NATIVE_VIEW.key -> "true") {
       withTable("jt") {

From 3afe448d39dc4877b2f2c62b3059aeb3ced0bd96 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Wed, 21 Oct 2015 13:43:17 -0700
Subject: [PATCH 318/896] [SPARK-9740][SPARK-9592][SPARK-9210][SQL] Change the
 default behavior of First/Last to RESPECT NULLS.

I am changing the default behavior of `First`/`Last` to respect null values (the SQL standard default behavior).

https://issues.apache.org/jira/browse/SPARK-9740

Author: Yin Huai <yhuai@databricks.com>

Closes #8113 from yhuai/firstLast.
---
 .../sql/catalyst/analysis/CheckAnalysis.scala |   3 +-
 .../catalyst/analysis/FunctionRegistry.scala  |   2 +
 .../expressions/aggregate/functions.scala     | 105 +++++++++++++++---
 .../expressions/aggregate/utils.scala         |   8 +-
 .../sql/catalyst/expressions/aggregates.scala |  95 ++++++++++++----
 .../spark/sql/expressions/WindowSpec.scala    |  13 ++-
 .../execution/AggregationQuerySuite.scala     |  38 +++++++
 7 files changed, 219 insertions(+), 45 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
index ab215407f7da..98d6637c0601 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
@@ -113,7 +113,8 @@ trait CheckAnalysis {
                 failAnalysis(
                   s"expression '${e.prettyString}' is neither present in the group by, " +
                     s"nor is it an aggregate function. " +
-                    "Add to group by or wrap in first() if you don't care which value you get.")
+                    "Add to group by or wrap in first() (or first_value) if you don't care " +
+                    "which value you get.")
               case e if groupingExprs.exists(_.semanticEquals(e)) => // OK
               case e if e.references.isEmpty => // OK
               case e => e.children.foreach(checkValidAggregateExpression)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index ba77b70a378a..f73b24e3630d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -179,7 +179,9 @@ object FunctionRegistry {
     expression[Average]("avg"),
     expression[Count]("count"),
     expression[First]("first"),
+    expression[First]("first_value"),
     expression[Last]("last"),
+    expression[Last]("last_value"),
     expression[Max]("max"),
     expression[Min]("min"),
     expression[Stddev]("stddev"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index c0bc7ec09c34..515246d34424 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -21,6 +21,8 @@ import java.lang.{Long => JLong}
 import java.util
 
 import com.clearspring.analytics.hash.MurmurHash
+
+import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
@@ -118,7 +120,23 @@ case class Count(child: Expression) extends DeclarativeAggregate {
   override val evaluateExpression = Cast(currentCount, LongType)
 }
 
-case class First(child: Expression) extends DeclarativeAggregate {
+/**
+ * Returns the first value of `child` for a group of rows. If the first value of `child`
+ * is `null`, it returns `null` (respecting nulls). Even if [[First]] is used on a already
+ * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
+ * is used) its result will not be deterministic (unless the input table is sorted and has
+ * a single partition, and we use a single reducer to do the aggregation.).
+ * @param child
+ */
+case class First(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -135,24 +153,61 @@ case class First(child: Expression) extends DeclarativeAggregate {
 
   private val first = AttributeReference("first", child.dataType)()
 
-  override val aggBufferAttributes = first :: Nil
+  private val valueSet = AttributeReference("valueSet", BooleanType)()
+
+  override val aggBufferAttributes = first :: valueSet :: Nil
 
   override val initialValues = Seq(
-    /* first = */ Literal.create(null, child.dataType)
+    /* first = */ Literal.create(null, child.dataType),
+    /* valueSet = */ Literal.create(false, BooleanType)
   )
 
-  override val updateExpressions = Seq(
-    /* first = */ If(IsNull(first), child, first)
-  )
+  override val updateExpressions = {
+    if (ignoreNulls) {
+      Seq(
+        /* first = */ If(Or(valueSet, IsNull(child)), first, child),
+        /* valueSet = */ Or(valueSet, IsNotNull(child))
+      )
+    } else {
+      Seq(
+        /* first = */ If(valueSet, first, child),
+        /* valueSet = */ Literal.create(true, BooleanType)
+      )
+    }
+  }
 
-  override val mergeExpressions = Seq(
-    /* first = */ If(IsNull(first.left), first.right, first.left)
-  )
+  override val mergeExpressions = {
+    // For first, we can just check if valueSet.left is set to true. If it is set
+    // to true, we use first.right. If not, we use first.right (even if valueSet.right is
+    // false, we are safe to do so because first.right will be null in this case).
+    Seq(
+      /* first = */ If(valueSet.left, first.left, first.right),
+      /* valueSet = */ Or(valueSet.left, valueSet.right)
+    )
+  }
 
   override val evaluateExpression = first
+
+  override def toString: String = s"FIRST($child)${if (ignoreNulls) " IGNORE NULLS"}"
 }
 
-case class Last(child: Expression) extends DeclarativeAggregate {
+/**
+ * Returns the last value of `child` for a group of rows. If the last value of `child`
+ * is `null`, it returns `null` (respecting nulls). Even if [[Last]] is used on a already
+ * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
+ * is used) its result will not be deterministic (unless the input table is sorted and has
+ * a single partition, and we use a single reducer to do the aggregation.).
+ * @param child
+ */
+case class Last(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
 
   override def children: Seq[Expression] = child :: Nil
 
@@ -175,15 +230,33 @@ case class Last(child: Expression) extends DeclarativeAggregate {
     /* last = */ Literal.create(null, child.dataType)
   )
 
-  override val updateExpressions = Seq(
-    /* last = */ If(IsNull(child), last, child)
-  )
+  override val updateExpressions = {
+    if (ignoreNulls) {
+      Seq(
+        /* last = */ If(IsNull(child), last, child)
+      )
+    } else {
+      Seq(
+        /* last = */ child
+      )
+    }
+  }
 
-  override val mergeExpressions = Seq(
-    /* last = */ If(IsNull(last.right), last.left, last.right)
-  )
+  override val mergeExpressions = {
+    if (ignoreNulls) {
+      Seq(
+        /* last = */ If(IsNull(last.right), last.left, last.right)
+      )
+    } else {
+      Seq(
+        /* last = */ last.right
+      )
+    }
+  }
 
   override val evaluateExpression = last
+
+  override def toString: String = s"LAST($child)${if (ignoreNulls) " IGNORE NULLS"}"
 }
 
 case class Max(child: Expression) extends DeclarativeAggregate {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
index f656ccf13b15..12bdab091580 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
@@ -61,15 +61,15 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = true)
 
-        case expressions.First(child) =>
+        case expressions.First(child, ignoreNulls) =>
           aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.First(child),
+            aggregateFunction = aggregate.First(child, ignoreNulls),
             mode = aggregate.Complete,
             isDistinct = false)
 
-        case expressions.Last(child) =>
+        case expressions.Last(child, ignoreNulls) =>
           aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Last(child),
+            aggregateFunction = aggregate.Last(child, ignoreNulls),
             mode = aggregate.Complete,
             isDistinct = false)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index f1c47f39043c..95061c463587 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.catalyst.expressions
 
 import com.clearspring.analytics.stream.cardinality.HyperLogLog
 
+import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.{CodeGenContext, GeneratedExpressionCode}
@@ -630,59 +631,113 @@ case class CombineSetsAndSumFunction(
   }
 }
 
-case class First(child: Expression) extends UnaryExpression with PartialAggregate1 {
+case class First(
+    child: Expression,
+    ignoreNullsExpr: Expression)
+  extends UnaryExpression with PartialAggregate1 {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
+
   override def nullable: Boolean = true
   override def dataType: DataType = child.dataType
-  override def toString: String = s"FIRST($child)"
+  override def toString: String = s"FIRST(${child}${if (ignoreNulls) " IGNORE NULLS"})"
 
   override def asPartial: SplitEvaluation = {
-    val partialFirst = Alias(First(child), "PartialFirst")()
+    val partialFirst = Alias(First(child, ignoreNulls), "PartialFirst")()
     SplitEvaluation(
-      First(partialFirst.toAttribute),
+      First(partialFirst.toAttribute, ignoreNulls),
       partialFirst :: Nil)
   }
-  override def newInstance(): FirstFunction = new FirstFunction(child, this)
+  override def newInstance(): FirstFunction = new FirstFunction(child, ignoreNulls, this)
 }
 
-case class FirstFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
+object First {
+  def apply(child: Expression): First = First(child, ignoreNulls = false)
 
-  var result: Any = null
+  def apply(child: Expression, ignoreNulls: Boolean): First =
+    First(child, Literal.create(ignoreNulls, BooleanType))
+}
+
+case class FirstFunction(
+    expr: Expression,
+    ignoreNulls: Boolean,
+    base: AggregateExpression1)
+  extends AggregateFunction1 {
+
+  def this() = this(null, null.asInstanceOf[Boolean], null) // Required for serialization.
+
+  private[this] var result: Any = null
+
+  private[this] var valueSet: Boolean = false
 
   override def update(input: InternalRow): Unit = {
-    // We ignore null values.
-    if (result == null) {
-      result = expr.eval(input)
+    if (!valueSet) {
+      val value = expr.eval(input)
+      // When we have not set the result, we will set the result if we respect nulls
+      // (i.e. ignoreNulls is false), or we ignore nulls and the evaluated value is not null.
+      if (!ignoreNulls || (ignoreNulls && value != null)) {
+        result = value
+        valueSet = true
+      }
     }
   }
 
   override def eval(input: InternalRow): Any = result
 }
 
-case class Last(child: Expression) extends UnaryExpression with PartialAggregate1 {
+case class Last(
+    child: Expression,
+    ignoreNullsExpr: Expression)
+  extends UnaryExpression with PartialAggregate1 {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
+
   override def references: AttributeSet = child.references
   override def nullable: Boolean = true
   override def dataType: DataType = child.dataType
-  override def toString: String = s"LAST($child)"
+  override def toString: String = s"LAST($child)${if (ignoreNulls) " IGNORE NULLS"}"
 
   override def asPartial: SplitEvaluation = {
-    val partialLast = Alias(Last(child), "PartialLast")()
+    val partialLast = Alias(Last(child, ignoreNulls), "PartialLast")()
     SplitEvaluation(
-      Last(partialLast.toAttribute),
+      Last(partialLast.toAttribute, ignoreNulls),
       partialLast :: Nil)
   }
-  override def newInstance(): LastFunction = new LastFunction(child, this)
+  override def newInstance(): LastFunction = new LastFunction(child, ignoreNulls, this)
 }
 
-case class LastFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
+object Last {
+  def apply(child: Expression): Last = Last(child, ignoreNulls = false)
+
+  def apply(child: Expression, ignoreNulls: Boolean): Last =
+    Last(child, Literal.create(ignoreNulls, BooleanType))
+}
+
+case class LastFunction(
+    expr: Expression,
+    ignoreNulls: Boolean,
+    base: AggregateExpression1)
+  extends AggregateFunction1 {
+
+  def this() = this(null, null.asInstanceOf[Boolean], null) // Required for serialization.
 
   var result: Any = null
 
   override def update(input: InternalRow): Unit = {
     val value = expr.eval(input)
-    // We ignore null values.
-    if (value != null) {
+    if (!ignoreNulls || (ignoreNulls && value != null)) {
       result = value
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
index c3d224629702..8b9247adea20 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.expressions
 
 import org.apache.spark.annotation.Experimental
+import org.apache.spark.sql.types.BooleanType
 import org.apache.spark.sql.{Column, catalyst}
 import org.apache.spark.sql.catalyst.expressions._
 
@@ -149,13 +150,17 @@ class WindowSpec private[sql](
       case Count(child) => WindowExpression(
         UnresolvedWindowFunction("count", child :: Nil),
         WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case First(child) => WindowExpression(
+      case First(child, ignoreNulls) => WindowExpression(
         // TODO this is a hack for Hive UDAF first_value
-        UnresolvedWindowFunction("first_value", child :: Nil),
+        UnresolvedWindowFunction(
+          "first_value",
+          child :: ignoreNulls :: Nil),
         WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Last(child) => WindowExpression(
+      case Last(child, ignoreNulls) => WindowExpression(
         // TODO this is a hack for Hive UDAF last_value
-        UnresolvedWindowFunction("last_value", child :: Nil),
+        UnresolvedWindowFunction(
+          "last_value",
+          child :: ignoreNulls :: Nil),
         WindowSpecDefinition(partitionSpec, orderSpec, frame))
       case Min(child) => WindowExpression(
         UnresolvedWindowFunction("min", child :: Nil),
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index c9e1bb199591..f38a3f63c3b5 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -323,6 +323,44 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
       Row(11.125) :: Nil)
   }
 
+  test("first_value and last_value") {
+    // We force to use a single partition for the sort and aggregate to make result
+    // deterministic.
+    withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
+      checkAnswer(
+        sqlContext.sql(
+          """
+            |SELECT
+            |  first_valUE(key),
+            |  lasT_value(key),
+            |  firSt(key),
+            |  lASt(key),
+            |  first_valUE(key, true),
+            |  lasT_value(key, true),
+            |  firSt(key, true),
+            |  lASt(key, true)
+            |FROM (SELECT key FROM agg1 ORDER BY key) tmp
+          """.stripMargin),
+        Row(null, 3, null, 3, 1, 3, 1, 3) :: Nil)
+
+      checkAnswer(
+        sqlContext.sql(
+          """
+            |SELECT
+            |  first_valUE(key),
+            |  lasT_value(key),
+            |  firSt(key),
+            |  lASt(key),
+            |  first_valUE(key, true),
+            |  lasT_value(key, true),
+            |  firSt(key, true),
+            |  lASt(key, true)
+            |FROM (SELECT key FROM agg1 ORDER BY key DESC) tmp
+          """.stripMargin),
+        Row(3, null, 3, null, 3, 1, 3, 1) :: Nil)
+    }
+  }
+
   test("udaf") {
     checkAnswer(
       sqlContext.sql(

From a37cd870489d7ff85455bf9b57d9aa5329514058 Mon Sep 17 00:00:00 2001
From: Artem Aliev <artem.aliev@datastax.com>
Date: Wed, 21 Oct 2015 14:12:00 -0700
Subject: [PATCH 319/896] [SPARK-11208][SQL] Filter out
 'hive.metastore.rawstore.impl' from executionHive temporary config

The executionHive assumed to be a standard meta store located in temporary directory as a derby db. But hive.metastore.rawstore.impl was not filtered out so any custom implementation of the metastore with other storage properties (not JDO) will persist that temporary functions. CassandraHiveMetaStore from DataStax Enterprise is one of examples.

Author: Artem Aliev <artem.aliev@datastax.com>

Closes #9178 from artem-aliev/SPARK-11208.
---
 .../src/main/scala/org/apache/spark/sql/hive/HiveContext.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 61f611638fe9..c7460d46b637 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -725,7 +725,8 @@ private[hive] object HiveContext {
     // We have to mask all properties in hive-site.xml that relates to metastore data source
     // as we used a local metastore here.
     HiveConf.ConfVars.values().foreach { confvar =>
-      if (confvar.varname.contains("datanucleus") || confvar.varname.contains("jdo")) {
+      if (confvar.varname.contains("datanucleus") || confvar.varname.contains("jdo")
+        || confvar.varname.contains("hive.metastore.rawstore.impl")) {
         propMap.put(confvar.varname, confvar.getDefaultExpr())
       }
     }

From 19ad18638e27cc7b403ea98c4f9f40a940932e30 Mon Sep 17 00:00:00 2001
From: Shagun Sodhani <sshagunsodhani@gmail.com>
Date: Wed, 21 Oct 2015 14:18:06 -0700
Subject: [PATCH 320/896] [SPARK-11233][SQL] register cosh in function registry

Author: Shagun Sodhani <sshagunsodhani@gmail.com>

Closes #9199 from shagunsodhani/proposed-fix-#11233.
---
 .../apache/spark/sql/catalyst/analysis/FunctionRegistry.scala    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index f73b24e3630d..3dce6c1a27e8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -142,6 +142,7 @@ object FunctionRegistry {
     expression[Ceil]("ceil"),
     expression[Ceil]("ceiling"),
     expression[Cos]("cos"),
+    expression[Cosh]("cosh"),
     expression[Conv]("conv"),
     expression[EulerNumber]("e"),
     expression[Exp]("exp"),

From dce2f8c9d74bda46f3c7a7ebe7372b04d6b17a61 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Wed, 21 Oct 2015 14:29:03 -0700
Subject: [PATCH 321/896] [SPARK-8654][SQL] Analysis exception when using NULL
 IN (...) : invalid cast

In the analysis phase , while processing the rules for IN predicate, we
compare the in-list types to the lhs expression type and generate
cast operation if necessary. In the case of NULL [NOT] IN expr1 , we end up
generating cast between in list types to NULL like cast (1 as NULL) which
is not a valid cast.

The fix is to find a common type between LHS and RHS expressions and cast
all the expression to the common type.

Author: Dilip Biswal <dbiswal@us.ibm.com>

This patch had conflicts when merged, resolved by
Committer: Michael Armbrust <michael@databricks.com>

Closes #9036 from dilipbiswal/spark_8654_new.
---
 .../catalyst/analysis/HiveTypeCoercion.scala  | 11 ++++++++--
 .../sql/catalyst/analysis/AnalysisSuite.scala | 21 +++++++++++++++++++
 .../analysis/HiveTypeCoercionSuite.scala      |  3 ++-
 3 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 87a3845b2d9e..1140150f6686 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -304,7 +304,11 @@ object HiveTypeCoercion {
   }
 
   /**
-   * Convert all expressions in in() list to the left operator type
+   * Convert the value and in list expressions to the common operator type
+   * by looking at all the argument types and finding the closest one that
+   * all the arguments can be cast to. When no common operator type is found
+   * the original expression will be returned and an Analysis Exception will
+   * be raised at type checking phase.
    */
   object InConversion extends Rule[LogicalPlan] {
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveExpressions {
@@ -312,7 +316,10 @@ object HiveTypeCoercion {
       case e if !e.childrenResolved => e
 
       case i @ In(a, b) if b.exists(_.dataType != a.dataType) =>
-        i.makeCopy(Array(a, b.map(Cast(_, a.dataType))))
+        findWiderCommonType(i.children.map(_.dataType)) match {
+          case Some(finalDataType) => i.withNewChildren(i.children.map(Cast(_, finalDataType)))
+          case None => i
+        }
     }
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 0a1fa74bede7..71d2939ecffe 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -153,4 +153,25 @@ class AnalysisSuite extends AnalysisTest {
 
     checkAnalysis(plan, expected)
   }
+
+  test("SPARK-8654: invalid CAST in NULL IN(...) expression") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(2))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisSuccess(plan)
+  }
+
+  test("SPARK-8654: different types in inlist but can be converted to a commmon type") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(1), Literal(1.2345))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisSuccess(plan)
+  }
+
+  test("SPARK-8654: check type compatibility error") {
+    val plan = Project(Alias(In(Literal(null), Seq(Literal(true), Literal(1))), "a")() :: Nil,
+      LocalRelation()
+    )
+    assertAnalysisError(plan, Seq("data type mismatch: Arguments must be same type"))
+  }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercionSuite.scala
index 6f33ab733b61..d3fafaae8993 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercionSuite.scala
@@ -470,7 +470,8 @@ class HiveTypeCoercionSuite extends PlanTest {
     )
     ruleTest(inConversion,
       In(Literal("a"), Seq(Literal(1), Literal("b"))),
-      In(Literal("a"), Seq(Cast(Literal(1), StringType), Cast(Literal("b"), StringType)))
+      In(Cast(Literal("a"), StringType),
+        Seq(Cast(Literal(1), StringType), Cast(Literal("b"), StringType)))
     )
   }
 }

From f481090a71940f06602a73f5bbd004980dea026f Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Wed, 21 Oct 2015 15:07:08 -0700
Subject: [PATCH 322/896] [SPARK-10151][SQL] Support invocation of hive macro

Macro in hive (which is GenericUDFMacro) contains real function inside of it but it's not conveyed to tasks, resulting null-pointer exception.

Author: navis.ryu <navis@apache.org>

Closes #8354 from navis/SPARK-10151.
---
 .../sql/hive/execution/HiveCompatibilitySuite.scala      | 1 +
 .../scala/org/apache/spark/sql/hive/HiveContext.scala    | 9 +++++++--
 .../scala/org/apache/spark/sql/hive/HiveInspectors.scala | 4 ++++
 .../main/scala/org/apache/spark/sql/hive/HiveQl.scala    | 2 ++
 .../main/scala/org/apache/spark/sql/hive/HiveShim.scala  | 9 ++++-----
 .../main/scala/org/apache/spark/sql/hive/hiveUDFs.scala  | 5 ++++-
 .../golden/macro-0-50131c0ba7b7a6b65c789a5a8497bada      | 1 +
 .../golden/macro-1-5ff5e8795c13303db5d3ea88e1e918b6      | 0
 .../golden/macro-10-45148a37f6ee9cf498dc7308cbd81a1c     | 0
 .../golden/macro-11-f55b8684c77f6eefc2618ba79e5e0587     | 1 +
 .../golden/macro-12-62b999122975c2a5de8e49fee089c041     | 0
 .../golden/macro-13-87e53d2b4c84098e662779e8f0a59084     | 1 +
 .../golden/macro-14-3a31df84432674ad410f44b137e32c2d     | 0
 .../golden/macro-15-56966c45104c0d9bc407e79538c2c029     | 0
 .../golden/macro-16-56966c45104c0d9bc407e79538c2c029     | 0
 .../golden/macro-17-b3864f1d19fdb88b3b74f6d74a0ba548     | 1 +
 .../golden/macro-18-bddb2fe17cd4d850c4462b7eb2b9bc2a     | 0
 .../golden/macro-19-e3c828c372607b8bf7be00a99359b662     | 0
 .../golden/macro-2-fde44c7854a9897acb4c2f78f24c8eec      | 1 +
 .../golden/macro-20-cb252a243d59809930a4ff371cbfa292     | 0
 .../golden/macro-21-cb252a243d59809930a4ff371cbfa292     | 0
 .../golden/macro-3-ddc4cb920b0a68e06551cd34ae4e29ff      | 0
 .../golden/macro-4-86292bbb7f147393c38bca051768dbda      | 0
 .../golden/macro-5-ca270bff813e5ab18a6a799016693aa8      | 0
 .../golden/macro-6-8976be22af3aba0cc4905e014b4e24fe      | 0
 .../golden/macro-7-decde0a59183a393e580941c633d3c5c      | 1 +
 .../golden/macro-8-3d25ffda9ab348f3e39ad967fc0e5020      | 0
 .../golden/macro-9-db5f5172704da1e6dd5d59c136b83e7e      | 0
 28 files changed, 28 insertions(+), 8 deletions(-)
 create mode 100644 sql/hive/src/test/resources/golden/macro-0-50131c0ba7b7a6b65c789a5a8497bada
 create mode 100644 sql/hive/src/test/resources/golden/macro-1-5ff5e8795c13303db5d3ea88e1e918b6
 create mode 100644 sql/hive/src/test/resources/golden/macro-10-45148a37f6ee9cf498dc7308cbd81a1c
 create mode 100644 sql/hive/src/test/resources/golden/macro-11-f55b8684c77f6eefc2618ba79e5e0587
 create mode 100644 sql/hive/src/test/resources/golden/macro-12-62b999122975c2a5de8e49fee089c041
 create mode 100644 sql/hive/src/test/resources/golden/macro-13-87e53d2b4c84098e662779e8f0a59084
 create mode 100644 sql/hive/src/test/resources/golden/macro-14-3a31df84432674ad410f44b137e32c2d
 create mode 100644 sql/hive/src/test/resources/golden/macro-15-56966c45104c0d9bc407e79538c2c029
 create mode 100644 sql/hive/src/test/resources/golden/macro-16-56966c45104c0d9bc407e79538c2c029
 create mode 100644 sql/hive/src/test/resources/golden/macro-17-b3864f1d19fdb88b3b74f6d74a0ba548
 create mode 100644 sql/hive/src/test/resources/golden/macro-18-bddb2fe17cd4d850c4462b7eb2b9bc2a
 create mode 100644 sql/hive/src/test/resources/golden/macro-19-e3c828c372607b8bf7be00a99359b662
 create mode 100644 sql/hive/src/test/resources/golden/macro-2-fde44c7854a9897acb4c2f78f24c8eec
 create mode 100644 sql/hive/src/test/resources/golden/macro-20-cb252a243d59809930a4ff371cbfa292
 create mode 100644 sql/hive/src/test/resources/golden/macro-21-cb252a243d59809930a4ff371cbfa292
 create mode 100644 sql/hive/src/test/resources/golden/macro-3-ddc4cb920b0a68e06551cd34ae4e29ff
 create mode 100644 sql/hive/src/test/resources/golden/macro-4-86292bbb7f147393c38bca051768dbda
 create mode 100644 sql/hive/src/test/resources/golden/macro-5-ca270bff813e5ab18a6a799016693aa8
 create mode 100644 sql/hive/src/test/resources/golden/macro-6-8976be22af3aba0cc4905e014b4e24fe
 create mode 100644 sql/hive/src/test/resources/golden/macro-7-decde0a59183a393e580941c633d3c5c
 create mode 100644 sql/hive/src/test/resources/golden/macro-8-3d25ffda9ab348f3e39ad967fc0e5020
 create mode 100644 sql/hive/src/test/resources/golden/macro-9-db5f5172704da1e6dd5d59c136b83e7e

diff --git a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
index 8f29fa91f7eb..eed9e436f9af 100644
--- a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
+++ b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
@@ -684,6 +684,7 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
     "load_file_with_space_in_the_name",
     "loadpart1",
     "louter_join_ppr",
+    "macro",
     "mapjoin_distinct",
     "mapjoin_filter_on_outerjoin",
     "mapjoin_mapjoin",
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c7460d46b637..c328734df316 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -21,6 +21,7 @@ import java.io.File
 import java.net.{URL, URLClassLoader}
 import java.sql.Timestamp
 import java.util.concurrent.TimeUnit
+import java.util.regex.Pattern
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.HashMap
@@ -592,10 +593,14 @@ class HiveContext private[hive](
     )
   }
 
+  private def functionOrMacroDDLPattern(command: String) = Pattern.compile(
+    ".*(create|drop)\\s+(temporary\\s+)?(function|macro).+", Pattern.DOTALL).matcher(command)
+
   protected[hive] def runSqlHive(sql: String): Seq[String] = {
-    if (sql.toLowerCase.contains("create temporary function")) {
+    val command = sql.trim.toLowerCase
+    if (functionOrMacroDDLPattern(command).matches()) {
       executionHive.runSqlHive(sql)
-    } else if (sql.trim.toLowerCase.startsWith("set")) {
+    } else if (command.startsWith("set")) {
       metadataHive.runSqlHive(sql)
       executionHive.runSqlHive(sql)
     } else {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
index cfe2bb05ad89..43c238fd49e0 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
@@ -723,6 +723,10 @@ private[hive] trait HiveInspectors {
         inspectorToDataType(m.getMapValueObjectInspector))
     case _: WritableStringObjectInspector => StringType
     case _: JavaStringObjectInspector => StringType
+    case _: WritableHiveVarcharObjectInspector => StringType
+    case _: JavaHiveVarcharObjectInspector => StringType
+    case _: WritableHiveCharObjectInspector => StringType
+    case _: JavaHiveCharObjectInspector => StringType
     case _: WritableIntObjectInspector => IntegerType
     case _: JavaIntObjectInspector => IntegerType
     case _: WritableDoubleObjectInspector => DoubleType
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index d4ff5cc0f12a..3697761f20c2 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -117,6 +117,7 @@ private[hive] object HiveQl extends Logging {
     "TOK_CREATEDATABASE",
     "TOK_CREATEFUNCTION",
     "TOK_CREATEINDEX",
+    "TOK_CREATEMACRO",
     "TOK_CREATEROLE",
 
     "TOK_DESCDATABASE",
@@ -125,6 +126,7 @@ private[hive] object HiveQl extends Logging {
     "TOK_DROPDATABASE",
     "TOK_DROPFUNCTION",
     "TOK_DROPINDEX",
+    "TOK_DROPMACRO",
     "TOK_DROPROLE",
     "TOK_DROPTABLE_PROPERTIES",
     "TOK_DROPVIEW",
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveShim.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveShim.scala
index 004805f3aed0..f0697613cff3 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveShim.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveShim.scala
@@ -117,9 +117,10 @@ private[hive] object HiveShim {
    * Detail discussion can be found at https://github.com/apache/spark/pull/3640
    *
    * @param functionClassName UDF class name
+   * @param instance optional UDF instance which contains additional information (for macro)
    */
-  private[hive] case class HiveFunctionWrapper(var functionClassName: String)
-    extends java.io.Externalizable {
+  private[hive] case class HiveFunctionWrapper(var functionClassName: String,
+    private var instance: AnyRef = null) extends java.io.Externalizable {
 
     // for Serialization
     def this() = this(null)
@@ -154,8 +155,6 @@ private[hive] object HiveShim {
       serializeObjectByKryo(Utilities.runtimeSerializationKryo.get(), function, out)
     }
 
-    private var instance: AnyRef = null
-
     def writeExternal(out: java.io.ObjectOutput) {
       // output the function name
       out.writeUTF(functionClassName)
@@ -184,7 +183,7 @@ private[hive] object HiveShim {
         // read the function in bytes
         val functionInBytesLength = in.readInt()
         val functionInBytes = new Array[Byte](functionInBytesLength)
-        in.read(functionInBytes, 0, functionInBytesLength)
+        in.readFully(functionInBytes)
 
         // deserialize the function object via Hive Utilities
         instance = deserializePlan[AnyRef](new java.io.ByteArrayInputStream(functionInBytes),
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index a2ebf6552fd0..f57b20699939 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -64,7 +64,10 @@ private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
       // don't satisfy the hive UDF, such as type mismatch, input number mismatch, etc. Here we
       // catch the exception and throw AnalysisException instead.
       try {
-        if (classOf[UDF].isAssignableFrom(functionInfo.getFunctionClass)) {
+        if (classOf[GenericUDFMacro].isAssignableFrom(functionInfo.getFunctionClass)) {
+          HiveGenericUDF(
+            new HiveFunctionWrapper(functionClassName, functionInfo.getGenericUDF), children)
+        } else if (classOf[UDF].isAssignableFrom(functionInfo.getFunctionClass)) {
           HiveSimpleUDF(new HiveFunctionWrapper(functionClassName), children)
         } else if (classOf[GenericUDF].isAssignableFrom(functionInfo.getFunctionClass)) {
           HiveGenericUDF(new HiveFunctionWrapper(functionClassName), children)
diff --git a/sql/hive/src/test/resources/golden/macro-0-50131c0ba7b7a6b65c789a5a8497bada b/sql/hive/src/test/resources/golden/macro-0-50131c0ba7b7a6b65c789a5a8497bada
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-0-50131c0ba7b7a6b65c789a5a8497bada
@@ -0,0 +1 @@
+0
diff --git a/sql/hive/src/test/resources/golden/macro-1-5ff5e8795c13303db5d3ea88e1e918b6 b/sql/hive/src/test/resources/golden/macro-1-5ff5e8795c13303db5d3ea88e1e918b6
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-10-45148a37f6ee9cf498dc7308cbd81a1c b/sql/hive/src/test/resources/golden/macro-10-45148a37f6ee9cf498dc7308cbd81a1c
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-11-f55b8684c77f6eefc2618ba79e5e0587 b/sql/hive/src/test/resources/golden/macro-11-f55b8684c77f6eefc2618ba79e5e0587
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-11-f55b8684c77f6eefc2618ba79e5e0587
@@ -0,0 +1 @@
+0
diff --git a/sql/hive/src/test/resources/golden/macro-12-62b999122975c2a5de8e49fee089c041 b/sql/hive/src/test/resources/golden/macro-12-62b999122975c2a5de8e49fee089c041
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-13-87e53d2b4c84098e662779e8f0a59084 b/sql/hive/src/test/resources/golden/macro-13-87e53d2b4c84098e662779e8f0a59084
new file mode 100644
index 000000000000..d00491fd7e5b
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-13-87e53d2b4c84098e662779e8f0a59084
@@ -0,0 +1 @@
+1
diff --git a/sql/hive/src/test/resources/golden/macro-14-3a31df84432674ad410f44b137e32c2d b/sql/hive/src/test/resources/golden/macro-14-3a31df84432674ad410f44b137e32c2d
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-15-56966c45104c0d9bc407e79538c2c029 b/sql/hive/src/test/resources/golden/macro-15-56966c45104c0d9bc407e79538c2c029
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-16-56966c45104c0d9bc407e79538c2c029 b/sql/hive/src/test/resources/golden/macro-16-56966c45104c0d9bc407e79538c2c029
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-17-b3864f1d19fdb88b3b74f6d74a0ba548 b/sql/hive/src/test/resources/golden/macro-17-b3864f1d19fdb88b3b74f6d74a0ba548
new file mode 100644
index 000000000000..f599e28b8ab0
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-17-b3864f1d19fdb88b3b74f6d74a0ba548
@@ -0,0 +1 @@
+10
diff --git a/sql/hive/src/test/resources/golden/macro-18-bddb2fe17cd4d850c4462b7eb2b9bc2a b/sql/hive/src/test/resources/golden/macro-18-bddb2fe17cd4d850c4462b7eb2b9bc2a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-19-e3c828c372607b8bf7be00a99359b662 b/sql/hive/src/test/resources/golden/macro-19-e3c828c372607b8bf7be00a99359b662
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-2-fde44c7854a9897acb4c2f78f24c8eec b/sql/hive/src/test/resources/golden/macro-2-fde44c7854a9897acb4c2f78f24c8eec
new file mode 100644
index 000000000000..b49805ff631c
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-2-fde44c7854a9897acb4c2f78f24c8eec
@@ -0,0 +1 @@
+0.8807970779778823
diff --git a/sql/hive/src/test/resources/golden/macro-20-cb252a243d59809930a4ff371cbfa292 b/sql/hive/src/test/resources/golden/macro-20-cb252a243d59809930a4ff371cbfa292
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-21-cb252a243d59809930a4ff371cbfa292 b/sql/hive/src/test/resources/golden/macro-21-cb252a243d59809930a4ff371cbfa292
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-3-ddc4cb920b0a68e06551cd34ae4e29ff b/sql/hive/src/test/resources/golden/macro-3-ddc4cb920b0a68e06551cd34ae4e29ff
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-4-86292bbb7f147393c38bca051768dbda b/sql/hive/src/test/resources/golden/macro-4-86292bbb7f147393c38bca051768dbda
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-5-ca270bff813e5ab18a6a799016693aa8 b/sql/hive/src/test/resources/golden/macro-5-ca270bff813e5ab18a6a799016693aa8
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-6-8976be22af3aba0cc4905e014b4e24fe b/sql/hive/src/test/resources/golden/macro-6-8976be22af3aba0cc4905e014b4e24fe
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-7-decde0a59183a393e580941c633d3c5c b/sql/hive/src/test/resources/golden/macro-7-decde0a59183a393e580941c633d3c5c
new file mode 100644
index 000000000000..0cfbf08886fc
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/macro-7-decde0a59183a393e580941c633d3c5c
@@ -0,0 +1 @@
+2
diff --git a/sql/hive/src/test/resources/golden/macro-8-3d25ffda9ab348f3e39ad967fc0e5020 b/sql/hive/src/test/resources/golden/macro-8-3d25ffda9ab348f3e39ad967fc0e5020
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/macro-9-db5f5172704da1e6dd5d59c136b83e7e b/sql/hive/src/test/resources/golden/macro-9-db5f5172704da1e6dd5d59c136b83e7e
new file mode 100644
index 000000000000..e69de29bb2d1

From 555b2086a1ee432067de77032f1e3c64735481f0 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 21 Oct 2015 15:33:13 -0700
Subject: [PATCH 323/896] Minor cleanup of ShuffleMapStage.outputLocs code.

I was looking at this code and found the documentation to be insufficient. I added more documentation, and refactored some relevant code path slightly to improve encapsulation. There are more that I want to do, but I want to get these changes in before doing more work.

My goal is to reduce exposing internal fields directly in ShuffleMapStage to improve encapsulation. After this change, DAGScheduler no longer directly writes outputLocs. There are still 3 places that reads outputLocs directly, but we can change those later.

Author: Reynold Xin <rxin@databricks.com>

Closes #9175 from rxin/stage-cleanup.
---
 .../apache/spark/scheduler/DAGScheduler.scala | 28 ++++++-------------
 .../apache/spark/scheduler/ResultStage.scala  |  5 ++++
 .../spark/scheduler/ShuffleMapStage.scala     | 21 ++++++++++++++
 .../org/apache/spark/scheduler/Stage.scala    |  5 +++-
 4 files changed, 39 insertions(+), 20 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index ade372be092a..995862ece594 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -353,10 +353,12 @@ class DAGScheduler(
     if (mapOutputTracker.containsShuffle(shuffleDep.shuffleId)) {
       val serLocs = mapOutputTracker.getSerializedMapOutputStatuses(shuffleDep.shuffleId)
       val locs = MapOutputTracker.deserializeMapStatuses(serLocs)
-      for (i <- 0 until locs.length) {
-        stage.outputLocs(i) = Option(locs(i)).toList // locs(i) will be null if missing
+      (0 until locs.length).foreach { i =>
+        if (locs(i) ne null) {
+          // locs(i) will be null if missing
+          stage.addOutputLoc(i, locs(i))
+        }
       }
-      stage.numAvailableOutputs = locs.count(_ != null)
     } else {
       // Kind of ugly: need to register RDDs with the cache and map output tracker here
       // since we can't do it in the RDD constructor because # of partitions is unknown
@@ -894,7 +896,7 @@ class DAGScheduler(
     submitStage(finalStage)
 
     // If the whole stage has already finished, tell the listener and remove it
-    if (!finalStage.outputLocs.contains(Nil)) {
+    if (finalStage.isAvailable) {
       markMapStageJobAsFinished(job, mapOutputTracker.getStatistics(dependency))
     }
 
@@ -931,24 +933,12 @@ class DAGScheduler(
     stage.pendingPartitions.clear()
 
     // First figure out the indexes of partition ids to compute.
-    val (allPartitions: Seq[Int], partitionsToCompute: Seq[Int]) = {
-      stage match {
-        case stage: ShuffleMapStage =>
-          val allPartitions = 0 until stage.numPartitions
-          val filteredPartitions = allPartitions.filter { id => stage.outputLocs(id).isEmpty }
-          (allPartitions, filteredPartitions)
-        case stage: ResultStage =>
-          val job = stage.resultOfJob.get
-          val allPartitions = 0 until job.numPartitions
-          val filteredPartitions = allPartitions.filter { id => !job.finished(id) }
-          (allPartitions, filteredPartitions)
-      }
-    }
+    val partitionsToCompute: Seq[Int] = stage.findMissingPartitions()
 
     // Create internal accumulators if the stage has no accumulators initialized.
     // Reset internal accumulators only if this stage is not partially submitted
     // Otherwise, we may override existing accumulator values from some tasks
-    if (stage.internalAccumulators.isEmpty || allPartitions == partitionsToCompute) {
+    if (stage.internalAccumulators.isEmpty || stage.numPartitions == partitionsToCompute.size) {
       stage.resetInternalAccumulators()
     }
 
@@ -1202,7 +1192,7 @@ class DAGScheduler(
 
               clearCacheLocs()
 
-              if (shuffleStage.outputLocs.contains(Nil)) {
+              if (!shuffleStage.isAvailable) {
                 // Some tasks had failed; let's resubmit this shuffleStage
                 // TODO: Lower-level scheduler should also deal with this
                 logInfo("Resubmitting " + shuffleStage + " (" + shuffleStage.name +
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala b/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
index c0451da1f024..c1d86af7e8fb 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
@@ -43,5 +43,10 @@ private[spark] class ResultStage(
    */
   var resultOfJob: Option[ActiveJob] = None
 
+  override def findMissingPartitions(): Seq[Int] = {
+    val job = resultOfJob.get
+    (0 until job.numPartitions).filter(id => !job.finished(id))
+  }
+
   override def toString: String = "ResultStage " + id
 }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
index 7d9296087640..3832d99eddae 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
@@ -48,12 +48,33 @@ private[spark] class ShuffleMapStage(
   /** Running map-stage jobs that were submitted to execute this stage independently (if any) */
   var mapStageJobs: List[ActiveJob] = Nil
 
+  /**
+   * Number of partitions that have shuffle outputs.
+   * When this reaches [[numPartitions]], this map stage is ready.
+   * This should be kept consistent as `outputLocs.filter(!_.isEmpty).size`.
+   */
   var numAvailableOutputs: Int = 0
 
+  /**
+   * Returns true if the map stage is ready, i.e. all partitions have shuffle outputs.
+   * This should be the same as `outputLocs.contains(Nil)`.
+   */
   def isAvailable: Boolean = numAvailableOutputs == numPartitions
 
+  /**
+   * List of [[MapStatus]] for each partition. The index of the array is the map partition id,
+   * and each value in the array is the list of possible [[MapStatus]] for a partition
+   * (a single task might run multiple times).
+   */
   val outputLocs = Array.fill[List[MapStatus]](numPartitions)(Nil)
 
+  override def findMissingPartitions(): Seq[Int] = {
+    val missing = (0 until numPartitions).filter(id => outputLocs(id).isEmpty)
+    assert(missing.size == numPartitions - numAvailableOutputs,
+      s"${missing.size} missing, expected ${numPartitions - numAvailableOutputs}")
+    missing
+  }
+
   def addOutputLoc(partition: Int, status: MapStatus): Unit = {
     val prevList = outputLocs(partition)
     outputLocs(partition) = status :: prevList
diff --git a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
index a3829c319c48..5ce4a484344f 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
@@ -61,7 +61,7 @@ private[scheduler] abstract class Stage(
     val callSite: CallSite)
   extends Logging {
 
-  val numPartitions = rdd.partitions.size
+  val numPartitions = rdd.partitions.length
 
   /** Set of jobs that this stage belongs to. */
   val jobIds = new HashSet[Int]
@@ -138,6 +138,9 @@ private[scheduler] abstract class Stage(
     case stage: Stage => stage != null && stage.id == id
     case _ => false
   }
+
+  /** Returns the sequence of partition ids that are missing (i.e. needs to be computed). */
+  def findMissingPartitions(): Seq[Int]
 }
 
 private[scheduler] object Stage {

From 40a10d7675578f8370d07e23810d9fc5d58e0550 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 21 Oct 2015 17:50:33 -0700
Subject: [PATCH 324/896] [SPARK-9392][SQL] Dataframe drop should work on
 unresolved columns

Dataframe drop should work on unresolved columns

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #8821 from yanboliang/spark-9392.
---
 .../src/main/scala/org/apache/spark/sql/DataFrame.scala    | 7 ++++++-
 .../test/scala/org/apache/spark/sql/DataFrameSuite.scala   | 6 +++---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 174bc6f42ad8..2f10aa9f3c44 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1237,9 +1237,14 @@ class DataFrame private[sql](
    * @since 1.4.1
    */
   def drop(col: Column): DataFrame = {
+    val expression = col match {
+      case Column(u: UnresolvedAttribute) =>
+        queryExecution.analyzed.resolveQuoted(u.name, sqlContext.analyzer.resolver).getOrElse(u)
+      case Column(expr: Expression) => expr
+    }
     val attrs = this.logicalPlan.output
     val colsAfterDrop = attrs.filter { attr =>
-      attr != col.expr
+      attr != expression
     }.map(attr => Column(attr))
     select(colsAfterDrop : _*)
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 6424f1f1d9cf..f4c7aa34e560 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -388,13 +388,13 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     assert(df.schema.map(_.name) === Seq("key", "value"))
   }
 
-  test("drop unknown column with same name (no-op) with column reference") {
+  test("drop unknown column with same name with column reference") {
     val col = Column("key")
     val df = testData.drop(col)
     checkAnswer(
       df,
-      testData.collect().toSeq)
-    assert(df.schema.map(_.name) === Seq("key", "value"))
+      testData.collect().map(x => Row(x.getString(1))).toSeq)
+    assert(df.schema.map(_.name) === Seq("value"))
   }
 
   test("drop column after join with duplicate columns using column reference") {

From 1d9733271595596683a6d956a7433fa601df1cc1 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 21 Oct 2015 19:20:31 -0700
Subject: [PATCH 325/896] [SPARK-11243][SQL] output UnsafeRow from columnar
 cache

This PR change InMemoryTableScan to output UnsafeRow, and optimize the unrolling and scanning by coping the bytes for var-length types between UnsafeRow and ByteBuffer directly without creating the wrapper objects. When scanning the decimals in TPC-DS store_sales table, it's 80% faster (copy it as long without create Decimal objects).

Author: Davies Liu <davies@databricks.com>

Closes #9203 from davies/unsafe_cache.
---
 .../sql/catalyst/expressions/UnsafeRow.java   |  31 +++++-
 .../codegen/UnsafeArrayWriter.java            |  78 ++++++++++----
 .../expressions/codegen/UnsafeRowWriter.java  | 102 ++++++++++++------
 .../codegen/GenerateUnsafeProjection.scala    |  57 +---------
 .../spark/sql/columnar/ColumnType.scala       |  81 ++++++++++++--
 .../sql/columnar/GenerateColumnAccessor.scala |  68 ++++++++++--
 .../columnar/InMemoryColumnarTableScan.scala  |   6 +-
 7 files changed, 291 insertions(+), 132 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 366615f6fe69..850838af9be3 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -402,7 +402,7 @@ public UTF8String getUTF8String(int ordinal) {
     if (isNullAt(ordinal)) return null;
     final long offsetAndSize = getLong(ordinal);
     final int offset = (int) (offsetAndSize >> 32);
-    final int size = (int) (offsetAndSize & ((1L << 32) - 1));
+    final int size = (int) offsetAndSize;
     return UTF8String.fromAddress(baseObject, baseOffset + offset, size);
   }
 
@@ -413,7 +413,7 @@ public byte[] getBinary(int ordinal) {
     } else {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
-      final int size = (int) (offsetAndSize & ((1L << 32) - 1));
+      final int size = (int) offsetAndSize;
       final byte[] bytes = new byte[size];
       Platform.copyMemory(
         baseObject,
@@ -446,7 +446,7 @@ public UnsafeRow getStruct(int ordinal, int numFields) {
     } else {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
-      final int size = (int) (offsetAndSize & ((1L << 32) - 1));
+      final int size = (int) offsetAndSize;
       final UnsafeRow row = new UnsafeRow();
       row.pointTo(baseObject, baseOffset + offset, numFields, size);
       return row;
@@ -460,7 +460,7 @@ public UnsafeArrayData getArray(int ordinal) {
     } else {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
-      final int size = (int) (offsetAndSize & ((1L << 32) - 1));
+      final int size = (int) offsetAndSize;
       final UnsafeArrayData array = new UnsafeArrayData();
       array.pointTo(baseObject, baseOffset + offset, size);
       return array;
@@ -474,7 +474,7 @@ public UnsafeMapData getMap(int ordinal) {
     } else {
       final long offsetAndSize = getLong(ordinal);
       final int offset = (int) (offsetAndSize >> 32);
-      final int size = (int) (offsetAndSize & ((1L << 32) - 1));
+      final int size = (int) offsetAndSize;
       final UnsafeMapData map = new UnsafeMapData();
       map.pointTo(baseObject, baseOffset + offset, size);
       return map;
@@ -618,6 +618,27 @@ public void writeTo(ByteBuffer buffer) {
     buffer.position(pos + sizeInBytes);
   }
 
+  /**
+   * Write the bytes of var-length field into ByteBuffer
+   *
+   * Note: only work with HeapByteBuffer
+   */
+  public void writeFieldTo(int ordinal, ByteBuffer buffer) {
+    final long offsetAndSize = getLong(ordinal);
+    final int offset = (int) (offsetAndSize >> 32);
+    final int size = (int) offsetAndSize;
+
+    buffer.putInt(size);
+    int pos = buffer.position();
+    buffer.position(pos + size);
+    Platform.copyMemory(
+      baseObject,
+      baseOffset + offset,
+      buffer.array(),
+      Platform.BYTE_ARRAY_OFFSET + buffer.arrayOffset() + pos,
+      size);
+  }
+
   @Override
   public void writeExternal(ObjectOutput out) throws IOException {
     byte[] bytes = getBytes();
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
index 7f2a1cb07af0..7dd932d1981b 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeArrayWriter.java
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql.catalyst.expressions.codegen;
 
-import org.apache.spark.sql.catalyst.expressions.UnsafeArrayData;
 import org.apache.spark.sql.types.Decimal;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.types.CalendarInterval;
@@ -64,29 +63,72 @@ public void setOffset(int ordinal) {
     Platform.putInt(holder.buffer, getElementOffset(ordinal), relativeOffset);
   }
 
-  public void writeCompactDecimal(int ordinal, Decimal input, int precision, int scale) {
-    // make sure Decimal object has the same scale as DecimalType
-    if (input.changePrecision(precision, scale)) {
-      Platform.putLong(holder.buffer, holder.cursor, input.toUnscaledLong());
-      setOffset(ordinal);
-      holder.cursor += 8;
-    } else {
-      setNullAt(ordinal);
+  public void write(int ordinal, boolean value) {
+    Platform.putBoolean(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 1;
+  }
+
+  public void write(int ordinal, byte value) {
+    Platform.putByte(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 1;
+  }
+
+  public void write(int ordinal, short value) {
+    Platform.putShort(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 2;
+  }
+
+  public void write(int ordinal, int value) {
+    Platform.putInt(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 4;
+  }
+
+  public void write(int ordinal, long value) {
+    Platform.putLong(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 8;
+  }
+
+  public void write(int ordinal, float value) {
+    if (Float.isNaN(value)) {
+      value = Float.NaN;
+    }
+    Platform.putFloat(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 4;
+  }
+
+  public void write(int ordinal, double value) {
+    if (Double.isNaN(value)) {
+      value = Double.NaN;
     }
+    Platform.putDouble(holder.buffer, holder.cursor, value);
+    setOffset(ordinal);
+    holder.cursor += 8;
   }
 
   public void write(int ordinal, Decimal input, int precision, int scale) {
     // make sure Decimal object has the same scale as DecimalType
     if (input.changePrecision(precision, scale)) {
-      final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
-      assert bytes.length <= 16;
-      holder.grow(bytes.length);
-
-      // Write the bytes to the variable length portion.
-      Platform.copyMemory(
-        bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
-      setOffset(ordinal);
-      holder.cursor += bytes.length;
+      if (precision <= Decimal.MAX_LONG_DIGITS()) {
+        Platform.putLong(holder.buffer, holder.cursor, input.toUnscaledLong());
+        setOffset(ordinal);
+        holder.cursor += 8;
+      } else {
+        final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
+        assert bytes.length <= 16;
+        holder.grow(bytes.length);
+
+        // Write the bytes to the variable length portion.
+        Platform.copyMemory(
+          bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
+        setOffset(ordinal);
+        holder.cursor += bytes.length;
+      }
     } else {
       setNullAt(ordinal);
     }
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
index e1f5a05d1d44..adbe2621870d 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
@@ -58,6 +58,10 @@ private void zeroOutPaddingBytes(int numBytes) {
     }
   }
 
+  public boolean isNullAt(int ordinal) {
+    return BitSetMethods.isSet(holder.buffer, startingOffset, ordinal);
+  }
+
   public void setNullAt(int ordinal) {
     BitSetMethods.set(holder.buffer, startingOffset, ordinal);
     Platform.putLong(holder.buffer, getFieldOffset(ordinal), 0L);
@@ -95,41 +99,75 @@ public void alignToWords(int numBytes) {
     }
   }
 
-  public void writeCompactDecimal(int ordinal, Decimal input, int precision, int scale) {
-    // make sure Decimal object has the same scale as DecimalType
-    if (input.changePrecision(precision, scale)) {
-      Platform.putLong(holder.buffer, getFieldOffset(ordinal), input.toUnscaledLong());
-    } else {
-      setNullAt(ordinal);
-    }
+  public void write(int ordinal, boolean value) {
+    Platform.putBoolean(holder.buffer, getFieldOffset(ordinal), value);
   }
 
-  public void write(int ordinal, Decimal input, int precision, int scale) {
-    // grow the global buffer before writing data.
-    holder.grow(16);
+  public void write(int ordinal, byte value) {
+    Platform.putByte(holder.buffer, getFieldOffset(ordinal), value);
+  }
 
-    // zero-out the bytes
-    Platform.putLong(holder.buffer, holder.cursor, 0L);
-    Platform.putLong(holder.buffer, holder.cursor + 8, 0L);
+  public void write(int ordinal, short value) {
+    Platform.putShort(holder.buffer, getFieldOffset(ordinal), value);
+  }
 
-    // Make sure Decimal object has the same scale as DecimalType.
-    // Note that we may pass in null Decimal object to set null for it.
-    if (input == null || !input.changePrecision(precision, scale)) {
-      BitSetMethods.set(holder.buffer, startingOffset, ordinal);
-      // keep the offset for future update
-      setOffsetAndSize(ordinal, 0L);
-    } else {
-      final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
-      assert bytes.length <= 16;
+  public void write(int ordinal, int value) {
+    Platform.putInt(holder.buffer, getFieldOffset(ordinal), value);
+  }
 
-      // Write the bytes to the variable length portion.
-      Platform.copyMemory(
-        bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
-      setOffsetAndSize(ordinal, bytes.length);
+  public void write(int ordinal, long value) {
+    Platform.putLong(holder.buffer, getFieldOffset(ordinal), value);
+  }
+
+  public void write(int ordinal, float value) {
+    if (Float.isNaN(value)) {
+      value = Float.NaN;
     }
+    Platform.putFloat(holder.buffer, getFieldOffset(ordinal), value);
+  }
 
-    // move the cursor forward.
-    holder.cursor += 16;
+  public void write(int ordinal, double value) {
+    if (Double.isNaN(value)) {
+      value = Double.NaN;
+    }
+    Platform.putDouble(holder.buffer, getFieldOffset(ordinal), value);
+  }
+
+  public void write(int ordinal, Decimal input, int precision, int scale) {
+    if (precision <= Decimal.MAX_LONG_DIGITS()) {
+      // make sure Decimal object has the same scale as DecimalType
+      if (input.changePrecision(precision, scale)) {
+        Platform.putLong(holder.buffer, getFieldOffset(ordinal), input.toUnscaledLong());
+      } else {
+        setNullAt(ordinal);
+      }
+    } else {
+      // grow the global buffer before writing data.
+      holder.grow(16);
+
+      // zero-out the bytes
+      Platform.putLong(holder.buffer, holder.cursor, 0L);
+      Platform.putLong(holder.buffer, holder.cursor + 8, 0L);
+
+      // Make sure Decimal object has the same scale as DecimalType.
+      // Note that we may pass in null Decimal object to set null for it.
+      if (input == null || !input.changePrecision(precision, scale)) {
+        BitSetMethods.set(holder.buffer, startingOffset, ordinal);
+        // keep the offset for future update
+        setOffsetAndSize(ordinal, 0L);
+      } else {
+        final byte[] bytes = input.toJavaBigDecimal().unscaledValue().toByteArray();
+        assert bytes.length <= 16;
+
+        // Write the bytes to the variable length portion.
+        Platform.copyMemory(
+          bytes, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, bytes.length);
+        setOffsetAndSize(ordinal, bytes.length);
+      }
+
+      // move the cursor forward.
+      holder.cursor += 16;
+    }
   }
 
   public void write(int ordinal, UTF8String input) {
@@ -151,7 +189,10 @@ public void write(int ordinal, UTF8String input) {
   }
 
   public void write(int ordinal, byte[] input) {
-    final int numBytes = input.length;
+    write(ordinal, input, 0, input.length);
+  }
+
+  public void write(int ordinal, byte[] input, int offset, int numBytes) {
     final int roundedSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
 
     // grow the global buffer before writing data.
@@ -160,7 +201,8 @@ public void write(int ordinal, byte[] input) {
     zeroOutPaddingBytes(numBytes);
 
     // Write the bytes to the variable length portion.
-    Platform.copyMemory(input, Platform.BYTE_ARRAY_OFFSET, holder.buffer, holder.cursor, numBytes);
+    Platform.copyMemory(input, Platform.BYTE_ARRAY_OFFSET + offset,
+      holder.buffer, holder.cursor, numBytes);
 
     setOffsetAndSize(ordinal, numBytes);
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index dbe92d6a8350..2136f82ba475 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -89,7 +89,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
         val setNull = dt match {
           case t: DecimalType if t.precision > Decimal.MAX_LONG_DIGITS =>
             // Can't call setNullAt() for DecimalType with precision larger than 18.
-            s"$rowWriter.write($index, null, ${t.precision}, ${t.scale});"
+            s"$rowWriter.write($index, (Decimal) null, ${t.precision}, ${t.scale});"
           case _ => s"$rowWriter.setNullAt($index);"
         }
 
@@ -124,17 +124,10 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
             """
 
           case _ if ctx.isPrimitiveType(dt) =>
-            val fieldOffset = ctx.freshName("fieldOffset")
             s"""
-              final long $fieldOffset = $rowWriter.getFieldOffset($index);
-              Platform.putLong($bufferHolder.buffer, $fieldOffset, 0L);
-              ${writePrimitiveType(ctx, input.value, dt, s"$bufferHolder.buffer", fieldOffset)}
+              $rowWriter.write($index, ${input.value});
             """
 
-          case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
-            s"$rowWriter.writeCompactDecimal($index, ${input.value}, " +
-              s"${t.precision}, ${t.scale});"
-
           case t: DecimalType =>
             s"$rowWriter.write($index, ${input.value}, ${t.precision}, ${t.scale});"
 
@@ -204,20 +197,6 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
           ${writeMapToBuffer(ctx, element, kt, vt, bufferHolder)}
         """
 
-      case _ if ctx.isPrimitiveType(et) =>
-        // Should we do word align?
-        val dataSize = et.defaultSize
-
-        s"""
-          $arrayWriter.setOffset($index);
-          ${writePrimitiveType(ctx, element, et,
-            s"$bufferHolder.buffer", s"$bufferHolder.cursor")}
-          $bufferHolder.cursor += $dataSize;
-        """
-
-      case t: DecimalType if t.precision <= Decimal.MAX_LONG_DIGITS =>
-        s"$arrayWriter.writeCompactDecimal($index, $element, ${t.precision}, ${t.scale});"
-
       case t: DecimalType =>
         s"$arrayWriter.write($index, $element, ${t.precision}, ${t.scale});"
 
@@ -296,38 +275,6 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     """
   }
 
-  private def writePrimitiveType(
-      ctx: CodeGenContext,
-      input: String,
-      dt: DataType,
-      buffer: String,
-      offset: String) = {
-    assert(ctx.isPrimitiveType(dt))
-
-    val putMethod = s"put${ctx.primitiveTypeName(dt)}"
-
-    dt match {
-      case FloatType | DoubleType =>
-        val normalized = ctx.freshName("normalized")
-        val boxedType = ctx.boxedType(dt)
-        val handleNaN =
-          s"""
-            final ${ctx.javaType(dt)} $normalized;
-            if ($boxedType.isNaN($input)) {
-              $normalized = $boxedType.NaN;
-            } else {
-              $normalized = $input;
-            }
-          """
-
-        s"""
-          $handleNaN
-          Platform.$putMethod($buffer, $offset, $normalized);
-        """
-      case _ => s"Platform.$putMethod($buffer, $offset, $input);"
-    }
-  }
-
   def createCode(ctx: CodeGenContext, expressions: Seq[Expression]): GeneratedExpressionCode = {
     val exprEvals = expressions.map(e => e.gen(ctx))
     val exprTypes = expressions.map(_.dataType)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
index 72fa299aa937..68e509eb5047 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
@@ -32,6 +32,13 @@ import org.apache.spark.unsafe.types.UTF8String
 /**
  * A help class for fast reading Int/Long/Float/Double from ByteBuffer in native order.
  *
+ * Note: There is not much difference between ByteBuffer.getByte/getShort and
+ * Unsafe.getByte/getShort, so we do not have helper methods for them.
+ *
+ * The unrolling (building columnar cache) is already slow, putLong/putDouble will not help much,
+ * so we do not have helper methods for them.
+ *
+ *
  * WARNNING: This only works with HeapByteBuffer
  */
 object ByteBufferHelper {
@@ -351,7 +358,38 @@ private[sql] object SHORT extends NativeColumnType(ShortType, 2) {
   }
 }
 
-private[sql] object STRING extends NativeColumnType(StringType, 8) {
+/**
+ * A fast path to copy var-length bytes between ByteBuffer and UnsafeRow without creating wrapper
+ * objects.
+ */
+private[sql] trait DirectCopyColumnType[JvmType] extends ColumnType[JvmType] {
+
+  // copy the bytes from ByteBuffer to UnsafeRow
+  override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
+    if (row.isInstanceOf[MutableUnsafeRow]) {
+      val numBytes = buffer.getInt
+      val cursor = buffer.position()
+      buffer.position(cursor + numBytes)
+      row.asInstanceOf[MutableUnsafeRow].writer.write(ordinal, buffer.array(),
+        buffer.arrayOffset() + cursor, numBytes)
+    } else {
+      setField(row, ordinal, extract(buffer))
+    }
+  }
+
+  // copy the bytes from UnsafeRow to ByteBuffer
+  override def append(row: InternalRow, ordinal: Int, buffer: ByteBuffer): Unit = {
+    if (row.isInstanceOf[UnsafeRow]) {
+      row.asInstanceOf[UnsafeRow].writeFieldTo(ordinal, buffer)
+    } else {
+      super.append(row, ordinal, buffer)
+    }
+  }
+}
+
+private[sql] object STRING
+  extends NativeColumnType(StringType, 8) with DirectCopyColumnType[UTF8String] {
+
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
     row.getUTF8String(ordinal).numBytes() + 4
   }
@@ -363,16 +401,17 @@ private[sql] object STRING extends NativeColumnType(StringType, 8) {
 
   override def extract(buffer: ByteBuffer): UTF8String = {
     val length = buffer.getInt()
-    assert(buffer.hasArray)
-    val base = buffer.array()
-    val offset = buffer.arrayOffset()
     val cursor = buffer.position()
     buffer.position(cursor + length)
-    UTF8String.fromBytes(base, offset + cursor, length)
+    UTF8String.fromBytes(buffer.array(), buffer.arrayOffset() + cursor, length)
   }
 
   override def setField(row: MutableRow, ordinal: Int, value: UTF8String): Unit = {
-    row.update(ordinal, value.clone())
+    if (row.isInstanceOf[MutableUnsafeRow]) {
+      row.asInstanceOf[MutableUnsafeRow].writer.write(ordinal, value)
+    } else {
+      row.update(ordinal, value.clone())
+    }
   }
 
   override def getField(row: InternalRow, ordinal: Int): UTF8String = {
@@ -393,10 +432,28 @@ private[sql] case class COMPACT_DECIMAL(precision: Int, scale: Int)
     Decimal(ByteBufferHelper.getLong(buffer), precision, scale)
   }
 
+  override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
+    if (row.isInstanceOf[MutableUnsafeRow]) {
+      // copy it as Long
+      row.setLong(ordinal, ByteBufferHelper.getLong(buffer))
+    } else {
+      setField(row, ordinal, extract(buffer))
+    }
+  }
+
   override def append(v: Decimal, buffer: ByteBuffer): Unit = {
     buffer.putLong(v.toUnscaledLong)
   }
 
+  override def append(row: InternalRow, ordinal: Int, buffer: ByteBuffer): Unit = {
+    if (row.isInstanceOf[UnsafeRow]) {
+      // copy it as Long
+      buffer.putLong(row.getLong(ordinal))
+    } else {
+      append(getField(row, ordinal), buffer)
+    }
+  }
+
   override def getField(row: InternalRow, ordinal: Int): Decimal = {
     row.getDecimal(ordinal, precision, scale)
   }
@@ -417,7 +474,7 @@ private[sql] object COMPACT_DECIMAL {
 }
 
 private[sql] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize: Int)
-  extends ColumnType[JvmType] {
+  extends ColumnType[JvmType] with DirectCopyColumnType[JvmType] {
 
   def serialize(value: JvmType): Array[Byte]
   def deserialize(bytes: Array[Byte]): JvmType
@@ -488,7 +545,8 @@ private[sql] object LARGE_DECIMAL {
   }
 }
 
-private[sql] case class STRUCT(dataType: StructType) extends ColumnType[UnsafeRow] {
+private[sql] case class STRUCT(dataType: StructType)
+  extends ColumnType[UnsafeRow] with DirectCopyColumnType[UnsafeRow] {
 
   private val numOfFields: Int = dataType.fields.size
 
@@ -528,7 +586,8 @@ private[sql] case class STRUCT(dataType: StructType) extends ColumnType[UnsafeRo
   override def clone(v: UnsafeRow): UnsafeRow = v.copy()
 }
 
-private[sql] case class ARRAY(dataType: ArrayType) extends ColumnType[UnsafeArrayData] {
+private[sql] case class ARRAY(dataType: ArrayType)
+  extends ColumnType[UnsafeArrayData] with DirectCopyColumnType[UnsafeArrayData] {
 
   override def defaultSize: Int = 16
 
@@ -566,7 +625,8 @@ private[sql] case class ARRAY(dataType: ArrayType) extends ColumnType[UnsafeArra
   override def clone(v: UnsafeArrayData): UnsafeArrayData = v.copy()
 }
 
-private[sql] case class MAP(dataType: MapType) extends ColumnType[UnsafeMapData] {
+private[sql] case class MAP(dataType: MapType)
+  extends ColumnType[UnsafeMapData] with DirectCopyColumnType[UnsafeMapData] {
 
   override def defaultSize: Int = 32
 
@@ -590,7 +650,6 @@ private[sql] case class MAP(dataType: MapType) extends ColumnType[UnsafeMapData]
 
   override def extract(buffer: ByteBuffer): UnsafeMapData = {
     val numBytes = buffer.getInt
-    assert(buffer.hasArray)
     val cursor = buffer.position()
     buffer.position(cursor + numBytes)
     val map = new UnsafeMapData
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
index e04bcda5800c..d0f5bfa1cd7b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
@@ -20,17 +20,43 @@ package org.apache.spark.sql.columnar
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.codegen.{CodeFormatter, CodeGenerator}
+import org.apache.spark.sql.catalyst.expressions.codegen.{UnsafeRowWriter, CodeFormatter, CodeGenerator}
 import org.apache.spark.sql.types._
 
 /**
- * An Iterator to walk throught the InternalRows from a CachedBatch
+ * An Iterator to walk through the InternalRows from a CachedBatch
  */
 abstract class ColumnarIterator extends Iterator[InternalRow] {
-  def initialize(input: Iterator[CachedBatch], mutableRow: MutableRow, columnTypes: Array[DataType],
+  def initialize(input: Iterator[CachedBatch], columnTypes: Array[DataType],
     columnIndexes: Array[Int]): Unit
 }
 
+/**
+ * An helper class to update the fields of UnsafeRow, used by ColumnAccessor
+ *
+ * WARNNING: These setter MUST be called in increasing order of ordinals.
+ */
+class MutableUnsafeRow(val writer: UnsafeRowWriter) extends GenericMutableRow(null) {
+
+  override def isNullAt(i: Int): Boolean = writer.isNullAt(i)
+  override def setNullAt(i: Int): Unit = writer.setNullAt(i)
+
+  override def setBoolean(i: Int, v: Boolean): Unit = writer.write(i, v)
+  override def setByte(i: Int, v: Byte): Unit = writer.write(i, v)
+  override def setShort(i: Int, v: Short): Unit = writer.write(i, v)
+  override def setInt(i: Int, v: Int): Unit = writer.write(i, v)
+  override def setLong(i: Int, v: Long): Unit = writer.write(i, v)
+  override def setFloat(i: Int, v: Float): Unit = writer.write(i, v)
+  override def setDouble(i: Int, v: Double): Unit = writer.write(i, v)
+
+  // the writer will be used directly to avoid creating wrapper objects
+  override def setDecimal(i: Int, v: Decimal, precision: Int): Unit =
+    throw new UnsupportedOperationException
+  override def update(i: Int, v: Any): Unit = throw new UnsupportedOperationException
+
+  // all other methods inherited from GenericMutableRow are not need
+}
+
 /**
  * Generates bytecode for an [[ColumnarIterator]] for columnar cache.
  */
@@ -41,6 +67,7 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
 
   protected def create(columnTypes: Seq[DataType]): ColumnarIterator = {
     val ctx = newCodeGenContext()
+    val numFields = columnTypes.size
     val (initializeAccessors, extractors) = columnTypes.zipWithIndex.map { case (dt, index) =>
       val accessorName = ctx.freshName("accessor")
       val accessorCls = dt match {
@@ -74,13 +101,27 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
       }
 
       val extract = s"$accessorName.extractTo(mutableRow, $index);"
-
-      (createCode, extract)
+      val patch = dt match {
+        case DecimalType.Fixed(p, s) if p > Decimal.MAX_LONG_DIGITS =>
+          // For large Decimal, it should have 16 bytes for future update even it's null now.
+          s"""
+            if (mutableRow.isNullAt($index)) {
+              rowWriter.write($index, (Decimal) null, $p, $s);
+            }
+           """
+        case other => ""
+      }
+      (createCode, extract + patch)
     }.unzip
 
     val code = s"""
       import java.nio.ByteBuffer;
       import java.nio.ByteOrder;
+      import scala.collection.Iterator;
+      import org.apache.spark.sql.types.DataType;
+      import org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder;
+      import org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter;
+      import org.apache.spark.sql.columnar.MutableUnsafeRow;
 
       public SpecificColumnarIterator generate($exprType[] expr) {
         return new SpecificColumnarIterator();
@@ -90,13 +131,17 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
 
         private ByteOrder nativeOrder = null;
         private byte[][] buffers = null;
+        private UnsafeRow unsafeRow = new UnsafeRow();
+        private BufferHolder bufferHolder = new BufferHolder();
+        private UnsafeRowWriter rowWriter = new UnsafeRowWriter();
+        private MutableUnsafeRow mutableRow = null;
 
         private int currentRow = 0;
         private int numRowsInBatch = 0;
 
         private scala.collection.Iterator input = null;
         private MutableRow mutableRow = null;
-        private ${classOf[DataType].getName}[] columnTypes = null;
+        private DataType[] columnTypes = null;
         private int[] columnIndexes = null;
 
         ${declareMutableStates(ctx)}
@@ -104,12 +149,12 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
         public SpecificColumnarIterator() {
           this.nativeOrder = ByteOrder.nativeOrder();
           this.buffers = new byte[${columnTypes.length}][];
+          this.mutableRow = new MutableUnsafeRow(rowWriter);
 
           ${initMutableStates(ctx)}
         }
 
-        public void initialize(scala.collection.Iterator input, MutableRow mutableRow,
-                               ${classOf[DataType].getName}[] columnTypes, int[] columnIndexes) {
+        public void initialize(Iterator input, DataType[] columnTypes, int[] columnIndexes) {
           this.input = input;
           this.mutableRow = mutableRow;
           this.columnTypes = columnTypes;
@@ -136,9 +181,12 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
         }
 
         public InternalRow next() {
-          ${extractors.mkString("\n")}
           currentRow += 1;
-          return mutableRow;
+          bufferHolder.reset();
+          rowWriter.initialize(bufferHolder, $numFields);
+          ${extractors.mkString("\n")}
+          unsafeRow.pointTo(bufferHolder.buffer, $numFields, bufferHolder.totalSize());
+          return unsafeRow;
         }
       }"""
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index 9f76a61a1574..b4607b12fcef 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -209,6 +209,8 @@ private[sql] case class InMemoryColumnarTableScan(
 
   override def output: Seq[Attribute] = attributes
 
+  override def outputsUnsafeRows: Boolean = true
+
   private def statsFor(a: Attribute) = relation.partitionStatistics.forAttribute(a)
 
   // Returned filter predicate should return false iff it is impossible for the input expression
@@ -317,14 +319,12 @@ private[sql] case class InMemoryColumnarTableScan(
           cachedBatchIterator
         }
 
-      val nextRow = new SpecificMutableRow(requestedColumnDataTypes)
       val columnTypes = requestedColumnDataTypes.map {
         case udt: UserDefinedType[_] => udt.sqlType
         case other => other
       }.toArray
       val columnarIterator = GenerateColumnAccessor.generate(columnTypes)
-      columnarIterator.initialize(cachedBatchesToScan, nextRow, columnTypes,
-        requestedColumnIndices.toArray)
+      columnarIterator.initialize(cachedBatchesToScan, columnTypes, requestedColumnIndices.toArray)
       if (enableAccumulators && columnarIterator.hasNext) {
         readPartitions += 1
       }

From c03b6d11589102b91f08728519e8520025db91e1 Mon Sep 17 00:00:00 2001
From: "zhichao.li" <zhichao.li@intel.com>
Date: Thu, 22 Oct 2015 03:59:26 -0700
Subject: [PATCH 326/896] [SPARK-11121][CORE] Correct the TaskLocation type

Correct the logic to return `HDFSCacheTaskLocation` instance when the input `str` is a in memory location.

Author: zhichao.li <zhichao.li@intel.com>

Closes #9096 from zhichao-li/uselessBranch.
---
 .../org/apache/spark/scheduler/TaskLocation.scala     |  2 +-
 .../apache/spark/scheduler/TaskSetManagerSuite.scala  | 11 ++++++++---
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
index da07ce2c6ea4..1b65926f5c74 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
@@ -67,7 +67,7 @@ private[spark] object TaskLocation {
     if (hstr.equals(str)) {
       new HostTaskLocation(str)
     } else {
-      new HostTaskLocation(hstr)
+      new HDFSCacheTaskLocation(hstr)
     }
   }
 }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
index f0eadf240943..695523cc8aa3 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
@@ -759,9 +759,9 @@ class TaskSetManagerSuite extends SparkFunSuite with LocalSparkContext with Logg
     val sched = new FakeTaskScheduler(sc,
         ("execA", "host1"), ("execB", "host2"), ("execC", "host3"))
     val taskSet = FakeTask.createTaskSet(3,
-      Seq(HostTaskLocation("host1")),
-      Seq(HostTaskLocation("host2")),
-      Seq(HDFSCacheTaskLocation("host3")))
+      Seq(TaskLocation("host1")),
+      Seq(TaskLocation("host2")),
+      Seq(TaskLocation("hdfs_cache_host3")))
     val clock = new ManualClock
     val manager = new TaskSetManager(sched, taskSet, MAX_TASK_FAILURES, clock)
     assert(manager.myLocalityLevels.sameElements(Array(PROCESS_LOCAL, NODE_LOCAL, ANY)))
@@ -776,6 +776,11 @@ class TaskSetManagerSuite extends SparkFunSuite with LocalSparkContext with Logg
     assert(manager.myLocalityLevels.sameElements(Array(ANY)))
   }
 
+  test("Test TaskLocation for different host type.") {
+    assert(TaskLocation("host1") === HostTaskLocation("host1"))
+    assert(TaskLocation("hdfs_cache_host1") === HDFSCacheTaskLocation("host1"))
+  }
+
   def createTaskResult(id: Int): DirectTaskResult[Int] = {
     val valueSer = SparkEnv.get.serializer.newInstance()
     new DirectTaskResult[Int](valueSer.serialize(id), mutable.Map.empty, new TaskMetrics)

From 94e2064fa1b04c05c805d9175c7c78bf583db5c6 Mon Sep 17 00:00:00 2001
From: Forest Fang <forest.fang@outlook.com>
Date: Thu, 22 Oct 2015 09:34:07 -0700
Subject: [PATCH 327/896] [SPARK-11244][SPARKR] sparkR.stop() should remove
 SQLContext

SparkR should remove `.sparkRSQLsc` and `.sparkRHivesc` when `sparkR.stop()` is called. Otherwise even when SparkContext is reinitialized, `sparkRSQL.init` returns the stale copy of the object and complains:

```r
sc <- sparkR.init("local")
sqlContext <- sparkRSQL.init(sc)
sparkR.stop()
sc <- sparkR.init("local")
sqlContext <- sparkRSQL.init(sc)
sqlContext
```
producing
```r
Error in callJMethod(x, "getClass") :
  Invalid jobj 1. If SparkR was restarted, Spark operations need to be re-executed.
```

I have added the check and removal only when SparkContext itself is initialized. I have also added corresponding test for this fix. Let me know if you want me to move the test to SQL test suite instead.

p.s. I tried lint-r but ended up a lots of errors on existing code.

Author: Forest Fang <forest.fang@outlook.com>

Closes #9205 from saurfang/sparkR.stop.
---
 R/pkg/R/sparkR.R                |  8 ++++++++
 R/pkg/inst/tests/test_context.R | 10 ++++++++++
 2 files changed, 18 insertions(+)

diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index 9cf2f1a361cf..043b0057bd04 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -39,6 +39,14 @@ sparkR.stop <- function() {
       sc <- get(".sparkRjsc", envir = env)
       callJMethod(sc, "stop")
       rm(".sparkRjsc", envir = env)
+
+      if (exists(".sparkRSQLsc", envir = env)) {
+        rm(".sparkRSQLsc", envir = env)
+      }
+
+      if (exists(".sparkRHivesc", envir = env)) {
+        rm(".sparkRHivesc", envir = env)
+      }
     }
 
     if (exists(".backendLaunched", envir = env)) {
diff --git a/R/pkg/inst/tests/test_context.R b/R/pkg/inst/tests/test_context.R
index 513bbc8e6205..e99815ed1562 100644
--- a/R/pkg/inst/tests/test_context.R
+++ b/R/pkg/inst/tests/test_context.R
@@ -26,6 +26,16 @@ test_that("repeatedly starting and stopping SparkR", {
   }
 })
 
+test_that("repeatedly starting and stopping SparkR SQL", {
+  for (i in 1:4) {
+    sc <- sparkR.init()
+    sqlContext <- sparkRSQL.init(sc)
+    df <- createDataFrame(sqlContext, data.frame(a = 1:20))
+    expect_equal(count(df), 20)
+    sparkR.stop()
+  }
+})
+
 test_that("rdd GC across sparkR.stop", {
   sparkR.stop()
   sc <- sparkR.init() # sc should get id 0

From f6d06adf05afa9c5386dc2396c94e7a98730289f Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Thu, 22 Oct 2015 09:46:30 -0700
Subject: [PATCH 328/896] [SPARK-10708] Consolidate sort shuffle
 implementations

There's a lot of duplication between SortShuffleManager and UnsafeShuffleManager. Given that these now provide the same set of functionality, now that UnsafeShuffleManager supports large records, I think that we should replace SortShuffleManager's serialized shuffle implementation with UnsafeShuffleManager's and should merge the two managers together.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #8829 from JoshRosen/consolidate-sort-shuffle-implementations.
---
 .../sort/BypassMergeSortShuffleWriter.java    | 106 +++++--
 .../{unsafe => sort}/PackedRecordPointer.java |   2 +-
 .../ShuffleExternalSorter.java}               |  28 +-
 .../ShuffleInMemorySorter.java}               |  16 +-
 .../ShuffleSortDataFormat.java}               |   8 +-
 .../shuffle/sort/SortShuffleFileWriter.java   |  53 ----
 .../shuffle/{unsafe => sort}/SpillInfo.java   |   4 +-
 .../{unsafe => sort}/UnsafeShuffleWriter.java |  12 +-
 .../scala/org/apache/spark/SparkEnv.scala     |   2 +-
 .../shuffle/sort/SortShuffleManager.scala     | 175 +++++++++--
 .../shuffle/sort/SortShuffleWriter.scala      |  28 +-
 .../shuffle/unsafe/UnsafeShuffleManager.scala | 202 -------------
 .../spark/util/collection/ChainedBuffer.scala | 146 ----------
 .../util/collection/ExternalSorter.scala      |  35 +--
 .../PartitionedSerializedPairBuffer.scala     | 273 ------------------
 .../PackedRecordPointerSuite.java             |   5 +-
 .../ShuffleInMemorySorterSuite.java}          |  16 +-
 .../UnsafeShuffleWriterSuite.java             |  10 +-
 .../org/apache/spark/SortShuffleSuite.scala   |  65 +++++
 .../spark/scheduler/DAGSchedulerSuite.scala   |   6 +-
 .../BypassMergeSortShuffleWriterSuite.scala   |  64 ++--
 .../SortShuffleManagerSuite.scala}            |  30 +-
 .../shuffle/sort/SortShuffleWriterSuite.scala |  45 ---
 .../shuffle/unsafe/UnsafeShuffleSuite.scala   | 102 -------
 .../util/collection/ChainedBufferSuite.scala  | 144 ---------
 ...PartitionedSerializedPairBufferSuite.scala | 148 ----------
 docs/configuration.md                         |   7 +-
 project/MimaExcludes.scala                    |   9 +-
 .../apache/spark/sql/execution/Exchange.scala |  23 +-
 .../execution/UnsafeRowSerializerSuite.scala  |   9 +-
 30 files changed, 456 insertions(+), 1317 deletions(-)
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe => sort}/PackedRecordPointer.java (98%)
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe/UnsafeShuffleExternalSorter.java => sort/ShuffleExternalSorter.java} (95%)
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe/UnsafeShuffleInMemorySorter.java => sort/ShuffleInMemorySorter.java} (88%)
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe/UnsafeShuffleSortDataFormat.java => sort/ShuffleSortDataFormat.java} (86%)
 delete mode 100644 core/src/main/java/org/apache/spark/shuffle/sort/SortShuffleFileWriter.java
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe => sort}/SpillInfo.java (90%)
 rename core/src/main/java/org/apache/spark/shuffle/{unsafe => sort}/UnsafeShuffleWriter.java (98%)
 delete mode 100644 core/src/main/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManager.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/util/collection/ChainedBuffer.scala
 delete mode 100644 core/src/main/scala/org/apache/spark/util/collection/PartitionedSerializedPairBuffer.scala
 rename core/src/test/java/org/apache/spark/shuffle/{unsafe => sort}/PackedRecordPointerSuite.java (96%)
 rename core/src/test/java/org/apache/spark/shuffle/{unsafe/UnsafeShuffleInMemorySorterSuite.java => sort/ShuffleInMemorySorterSuite.java} (87%)
 rename core/src/test/java/org/apache/spark/shuffle/{unsafe => sort}/UnsafeShuffleWriterSuite.java (98%)
 rename core/src/test/scala/org/apache/spark/shuffle/{unsafe/UnsafeShuffleManagerSuite.scala => sort/SortShuffleManagerSuite.scala} (80%)
 delete mode 100644 core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleWriterSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/util/collection/ChainedBufferSuite.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/util/collection/PartitionedSerializedPairBufferSuite.scala

diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
index f5d80bbcf355..ee82d679935c 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
@@ -21,21 +21,30 @@
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import javax.annotation.Nullable;
 
+import scala.None$;
+import scala.Option;
 import scala.Product2;
 import scala.Tuple2;
 import scala.collection.Iterator;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.io.Closeables;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.spark.Partitioner;
+import org.apache.spark.ShuffleDependency;
 import org.apache.spark.SparkConf;
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
+import org.apache.spark.scheduler.MapStatus;
+import org.apache.spark.scheduler.MapStatus$;
 import org.apache.spark.serializer.Serializer;
 import org.apache.spark.serializer.SerializerInstance;
+import org.apache.spark.shuffle.IndexShuffleBlockResolver;
+import org.apache.spark.shuffle.ShuffleWriter;
 import org.apache.spark.storage.*;
 import org.apache.spark.util.Utils;
 
@@ -62,7 +71,7 @@
  * <p>
  * There have been proposals to completely remove this code path; see SPARK-6026 for details.
  */
-final class BypassMergeSortShuffleWriter<K, V> implements SortShuffleFileWriter<K, V> {
+final class BypassMergeSortShuffleWriter<K, V> extends ShuffleWriter<K, V> {
 
   private final Logger logger = LoggerFactory.getLogger(BypassMergeSortShuffleWriter.class);
 
@@ -72,31 +81,52 @@ final class BypassMergeSortShuffleWriter<K, V> implements SortShuffleFileWriter<
   private final BlockManager blockManager;
   private final Partitioner partitioner;
   private final ShuffleWriteMetrics writeMetrics;
+  private final int shuffleId;
+  private final int mapId;
   private final Serializer serializer;
+  private final IndexShuffleBlockResolver shuffleBlockResolver;
 
   /** Array of file writers, one for each partition */
   private DiskBlockObjectWriter[] partitionWriters;
+  @Nullable private MapStatus mapStatus;
+  private long[] partitionLengths;
+
+  /**
+   * Are we in the process of stopping? Because map tasks can call stop() with success = true
+   * and then call stop() with success = false if they get an exception, we want to make sure
+   * we don't try deleting files, etc twice.
+   */
+  private boolean stopping = false;
 
   public BypassMergeSortShuffleWriter(
-      SparkConf conf,
       BlockManager blockManager,
-      Partitioner partitioner,
-      ShuffleWriteMetrics writeMetrics,
-      Serializer serializer) {
+      IndexShuffleBlockResolver shuffleBlockResolver,
+      BypassMergeSortShuffleHandle<K, V> handle,
+      int mapId,
+      TaskContext taskContext,
+      SparkConf conf) {
     // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
     this.fileBufferSize = (int) conf.getSizeAsKb("spark.shuffle.file.buffer", "32k") * 1024;
     this.transferToEnabled = conf.getBoolean("spark.file.transferTo", true);
-    this.numPartitions = partitioner.numPartitions();
     this.blockManager = blockManager;
-    this.partitioner = partitioner;
-    this.writeMetrics = writeMetrics;
-    this.serializer = serializer;
+    final ShuffleDependency<K, V, V> dep = handle.dependency();
+    this.mapId = mapId;
+    this.shuffleId = dep.shuffleId();
+    this.partitioner = dep.partitioner();
+    this.numPartitions = partitioner.numPartitions();
+    this.writeMetrics = new ShuffleWriteMetrics();
+    taskContext.taskMetrics().shuffleWriteMetrics_$eq(Option.apply(writeMetrics));
+    this.serializer = Serializer.getSerializer(dep.serializer());
+    this.shuffleBlockResolver = shuffleBlockResolver;
   }
 
   @Override
-  public void insertAll(Iterator<Product2<K, V>> records) throws IOException {
+  public void write(Iterator<Product2<K, V>> records) throws IOException {
     assert (partitionWriters == null);
     if (!records.hasNext()) {
+      partitionLengths = new long[numPartitions];
+      shuffleBlockResolver.writeIndexFile(shuffleId, mapId, partitionLengths);
+      mapStatus = MapStatus$.MODULE$.apply(blockManager.shuffleServerId(), partitionLengths);
       return;
     }
     final SerializerInstance serInstance = serializer.newInstance();
@@ -124,13 +154,24 @@ public void insertAll(Iterator<Product2<K, V>> records) throws IOException {
     for (DiskBlockObjectWriter writer : partitionWriters) {
       writer.commitAndClose();
     }
+
+    partitionLengths =
+      writePartitionedFile(shuffleBlockResolver.getDataFile(shuffleId, mapId));
+    shuffleBlockResolver.writeIndexFile(shuffleId, mapId, partitionLengths);
+    mapStatus = MapStatus$.MODULE$.apply(blockManager.shuffleServerId(), partitionLengths);
   }
 
-  @Override
-  public long[] writePartitionedFile(
-      BlockId blockId,
-      TaskContext context,
-      File outputFile) throws IOException {
+  @VisibleForTesting
+  long[] getPartitionLengths() {
+    return partitionLengths;
+  }
+
+  /**
+   * Concatenate all of the per-partition files into a single combined file.
+   *
+   * @return array of lengths, in bytes, of each partition of the file (used by map output tracker).
+   */
+  private long[] writePartitionedFile(File outputFile) throws IOException {
     // Track location of the partition starts in the output file
     final long[] lengths = new long[numPartitions];
     if (partitionWriters == null) {
@@ -165,18 +206,33 @@ public long[] writePartitionedFile(
   }
 
   @Override
-  public void stop() throws IOException {
-    if (partitionWriters != null) {
-      try {
-        for (DiskBlockObjectWriter writer : partitionWriters) {
-          // This method explicitly does _not_ throw exceptions:
-          File file = writer.revertPartialWritesAndClose();
-          if (!file.delete()) {
-            logger.error("Error while deleting file {}", file.getAbsolutePath());
+  public Option<MapStatus> stop(boolean success) {
+    if (stopping) {
+      return None$.empty();
+    } else {
+      stopping = true;
+      if (success) {
+        if (mapStatus == null) {
+          throw new IllegalStateException("Cannot call stop(true) without having called write()");
+        }
+        return Option.apply(mapStatus);
+      } else {
+        // The map task failed, so delete our output data.
+        if (partitionWriters != null) {
+          try {
+            for (DiskBlockObjectWriter writer : partitionWriters) {
+              // This method explicitly does _not_ throw exceptions:
+              File file = writer.revertPartialWritesAndClose();
+              if (!file.delete()) {
+                logger.error("Error while deleting file {}", file.getAbsolutePath());
+              }
+            }
+          } finally {
+            partitionWriters = null;
           }
         }
-      } finally {
-        partitionWriters = null;
+        shuffleBlockResolver.removeDataByMap(shuffleId, mapId);
+        return None$.empty();
       }
     }
   }
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/PackedRecordPointer.java b/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
similarity index 98%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/PackedRecordPointer.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
index 4ee6a82c0423..c11711966fa8 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/PackedRecordPointer.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 /**
  * Wrapper around an 8-byte word that holds a 24-bit partition number and 40-bit record pointer.
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleExternalSorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
similarity index 95%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleExternalSorter.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
index e73ba3946882..85fdaa8115fa 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import javax.annotation.Nullable;
 import java.io.File;
@@ -48,7 +48,7 @@
  * <p>
  * Incoming records are appended to data pages. When all records have been inserted (or when the
  * current thread's shuffle memory limit is reached), the in-memory records are sorted according to
- * their partition ids (using a {@link UnsafeShuffleInMemorySorter}). The sorted records are then
+ * their partition ids (using a {@link ShuffleInMemorySorter}). The sorted records are then
  * written to a single output file (or multiple files, if we've spilled). The format of the output
  * files is the same as the format of the final output file written by
  * {@link org.apache.spark.shuffle.sort.SortShuffleWriter}: each output partition's records are
@@ -59,9 +59,9 @@
  * spill files. Instead, this merging is performed in {@link UnsafeShuffleWriter}, which uses a
  * specialized merge procedure that avoids extra serialization/deserialization.
  */
-final class UnsafeShuffleExternalSorter {
+final class ShuffleExternalSorter {
 
-  private final Logger logger = LoggerFactory.getLogger(UnsafeShuffleExternalSorter.class);
+  private final Logger logger = LoggerFactory.getLogger(ShuffleExternalSorter.class);
 
   @VisibleForTesting
   static final int DISK_WRITE_BUFFER_SIZE = 1024 * 1024;
@@ -76,6 +76,10 @@ final class UnsafeShuffleExternalSorter {
   private final BlockManager blockManager;
   private final TaskContext taskContext;
   private final ShuffleWriteMetrics writeMetrics;
+  private long numRecordsInsertedSinceLastSpill = 0;
+
+  /** Force this sorter to spill when there are this many elements in memory. For testing only */
+  private final long numElementsForSpillThreshold;
 
   /** The buffer size to use when writing spills using DiskBlockObjectWriter */
   private final int fileBufferSizeBytes;
@@ -94,12 +98,12 @@ final class UnsafeShuffleExternalSorter {
   private long peakMemoryUsedBytes;
 
   // These variables are reset after spilling:
-  @Nullable private UnsafeShuffleInMemorySorter inMemSorter;
+  @Nullable private ShuffleInMemorySorter inMemSorter;
   @Nullable private MemoryBlock currentPage = null;
   private long currentPagePosition = -1;
   private long freeSpaceInCurrentPage = 0;
 
-  public UnsafeShuffleExternalSorter(
+  public ShuffleExternalSorter(
       TaskMemoryManager memoryManager,
       ShuffleMemoryManager shuffleMemoryManager,
       BlockManager blockManager,
@@ -117,6 +121,8 @@ public UnsafeShuffleExternalSorter(
     this.numPartitions = numPartitions;
     // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
     this.fileBufferSizeBytes = (int) conf.getSizeAsKb("spark.shuffle.file.buffer", "32k") * 1024;
+    this.numElementsForSpillThreshold =
+      conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MAX_VALUE);
     this.pageSizeBytes = (int) Math.min(
       PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES, shuffleMemoryManager.pageSizeBytes());
     this.maxRecordSizeBytes = pageSizeBytes - 4;
@@ -140,7 +146,8 @@ private void initializeForWriting() throws IOException {
       throw new IOException("Could not acquire " + memoryRequested + " bytes of memory");
     }
 
-    this.inMemSorter = new UnsafeShuffleInMemorySorter(initialSize);
+    this.inMemSorter = new ShuffleInMemorySorter(initialSize);
+    numRecordsInsertedSinceLastSpill = 0;
   }
 
   /**
@@ -166,7 +173,7 @@ private void writeSortedFile(boolean isLastFile) throws IOException {
     }
 
     // This call performs the actual sort.
-    final UnsafeShuffleInMemorySorter.UnsafeShuffleSorterIterator sortedRecords =
+    final ShuffleInMemorySorter.ShuffleSorterIterator sortedRecords =
       inMemSorter.getSortedIterator();
 
     // Currently, we need to open a new DiskBlockObjectWriter for each partition; we can avoid this
@@ -406,6 +413,10 @@ public void insertRecord(
       int lengthInBytes,
       int partitionId) throws IOException {
 
+    if (numRecordsInsertedSinceLastSpill > numElementsForSpillThreshold) {
+      spill();
+    }
+
     growPointerArrayIfNecessary();
     // Need 4 bytes to store the record length.
     final int totalSpaceRequired = lengthInBytes + 4;
@@ -453,6 +464,7 @@ public void insertRecord(
       recordBaseObject, recordBaseOffset, dataPageBaseObject, dataPagePosition, lengthInBytes);
     assert(inMemSorter != null);
     inMemSorter.insertRecord(recordAddress, partitionId);
+    numRecordsInsertedSinceLastSpill += 1;
   }
 
   /**
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
similarity index 88%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorter.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
index 5bab501da936..a8dee6c6101c 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
@@ -15,13 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import java.util.Comparator;
 
 import org.apache.spark.util.collection.Sorter;
 
-final class UnsafeShuffleInMemorySorter {
+final class ShuffleInMemorySorter {
 
   private final Sorter<PackedRecordPointer, long[]> sorter;
   private static final class SortComparator implements Comparator<PackedRecordPointer> {
@@ -44,10 +44,10 @@ public int compare(PackedRecordPointer left, PackedRecordPointer right) {
    */
   private int pointerArrayInsertPosition = 0;
 
-  public UnsafeShuffleInMemorySorter(int initialSize) {
+  public ShuffleInMemorySorter(int initialSize) {
     assert (initialSize > 0);
     this.pointerArray = new long[initialSize];
-    this.sorter = new Sorter<PackedRecordPointer, long[]>(UnsafeShuffleSortDataFormat.INSTANCE);
+    this.sorter = new Sorter<PackedRecordPointer, long[]>(ShuffleSortDataFormat.INSTANCE);
   }
 
   public void expandPointerArray() {
@@ -92,14 +92,14 @@ public void insertRecord(long recordPointer, int partitionId) {
   /**
    * An iterator-like class that's used instead of Java's Iterator in order to facilitate inlining.
    */
-  public static final class UnsafeShuffleSorterIterator {
+  public static final class ShuffleSorterIterator {
 
     private final long[] pointerArray;
     private final int numRecords;
     final PackedRecordPointer packedRecordPointer = new PackedRecordPointer();
     private int position = 0;
 
-    public UnsafeShuffleSorterIterator(int numRecords, long[] pointerArray) {
+    public ShuffleSorterIterator(int numRecords, long[] pointerArray) {
       this.numRecords = numRecords;
       this.pointerArray = pointerArray;
     }
@@ -117,8 +117,8 @@ public void loadNext() {
   /**
    * Return an iterator over record pointers in sorted order.
    */
-  public UnsafeShuffleSorterIterator getSortedIterator() {
+  public ShuffleSorterIterator getSortedIterator() {
     sorter.sort(pointerArray, 0, pointerArrayInsertPosition, SORT_COMPARATOR);
-    return new UnsafeShuffleSorterIterator(pointerArrayInsertPosition, pointerArray);
+    return new ShuffleSorterIterator(pointerArrayInsertPosition, pointerArray);
   }
 }
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleSortDataFormat.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
similarity index 86%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleSortDataFormat.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
index a66d74ee4478..8a1e5aec6ff0 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleSortDataFormat.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
@@ -15,15 +15,15 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import org.apache.spark.util.collection.SortDataFormat;
 
-final class UnsafeShuffleSortDataFormat extends SortDataFormat<PackedRecordPointer, long[]> {
+final class ShuffleSortDataFormat extends SortDataFormat<PackedRecordPointer, long[]> {
 
-  public static final UnsafeShuffleSortDataFormat INSTANCE = new UnsafeShuffleSortDataFormat();
+  public static final ShuffleSortDataFormat INSTANCE = new ShuffleSortDataFormat();
 
-  private UnsafeShuffleSortDataFormat() { }
+  private ShuffleSortDataFormat() { }
 
   @Override
   public PackedRecordPointer getKey(long[] data, int pos) {
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/SortShuffleFileWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/SortShuffleFileWriter.java
deleted file mode 100644
index 656ea0401a14..000000000000
--- a/core/src/main/java/org/apache/spark/shuffle/sort/SortShuffleFileWriter.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle.sort;
-
-import java.io.File;
-import java.io.IOException;
-
-import scala.Product2;
-import scala.collection.Iterator;
-
-import org.apache.spark.annotation.Private;
-import org.apache.spark.TaskContext;
-import org.apache.spark.storage.BlockId;
-
-/**
- * Interface for objects that {@link SortShuffleWriter} uses to write its output files.
- */
-@Private
-public interface SortShuffleFileWriter<K, V> {
-
-  void insertAll(Iterator<Product2<K, V>> records) throws IOException;
-
-  /**
-   * Write all the data added into this shuffle sorter into a file in the disk store. This is
-   * called by the SortShuffleWriter and can go through an efficient path of just concatenating
-   * binary files if we decided to avoid merge-sorting.
-   *
-   * @param blockId block ID to write to. The index file will be blockId.name + ".index".
-   * @param context a TaskContext for a running Spark task, for us to update shuffle metrics.
-   * @return array of lengths, in bytes, of each partition of the file (used by map output tracker)
-   */
-  long[] writePartitionedFile(
-      BlockId blockId,
-      TaskContext context,
-      File outputFile) throws IOException;
-
-  void stop() throws IOException;
-}
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/SpillInfo.java b/core/src/main/java/org/apache/spark/shuffle/sort/SpillInfo.java
similarity index 90%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/SpillInfo.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/SpillInfo.java
index 7bac0dc0bbeb..df9f7b7abe02 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/SpillInfo.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/SpillInfo.java
@@ -15,14 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import java.io.File;
 
 import org.apache.spark.storage.TempShuffleBlockId;
 
 /**
- * Metadata for a block of data written by {@link UnsafeShuffleExternalSorter}.
+ * Metadata for a block of data written by {@link ShuffleExternalSorter}.
  */
 final class SpillInfo {
   final long[] partitionLengths;
diff --git a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
similarity index 98%
rename from core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriter.java
rename to core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
index fdb309e365f6..e8f050cb2dab 100644
--- a/core/src/main/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import javax.annotation.Nullable;
 import java.io.*;
@@ -80,7 +80,7 @@ public class UnsafeShuffleWriter<K, V> extends ShuffleWriter<K, V> {
   private final boolean transferToEnabled;
 
   @Nullable private MapStatus mapStatus;
-  @Nullable private UnsafeShuffleExternalSorter sorter;
+  @Nullable private ShuffleExternalSorter sorter;
   private long peakMemoryUsedBytes = 0;
 
   /** Subclass of ByteArrayOutputStream that exposes `buf` directly. */
@@ -104,15 +104,15 @@ public UnsafeShuffleWriter(
       IndexShuffleBlockResolver shuffleBlockResolver,
       TaskMemoryManager memoryManager,
       ShuffleMemoryManager shuffleMemoryManager,
-      UnsafeShuffleHandle<K, V> handle,
+      SerializedShuffleHandle<K, V> handle,
       int mapId,
       TaskContext taskContext,
       SparkConf sparkConf) throws IOException {
     final int numPartitions = handle.dependency().partitioner().numPartitions();
-    if (numPartitions > UnsafeShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS()) {
+    if (numPartitions > SortShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE()) {
       throw new IllegalArgumentException(
         "UnsafeShuffleWriter can only be used for shuffles with at most " +
-          UnsafeShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS() + " reduce partitions");
+          SortShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE() + " reduce partitions");
     }
     this.blockManager = blockManager;
     this.shuffleBlockResolver = shuffleBlockResolver;
@@ -195,7 +195,7 @@ public void write(scala.collection.Iterator<Product2<K, V>> records) throws IOEx
 
   private void open() throws IOException {
     assert (sorter == null);
-    sorter = new UnsafeShuffleExternalSorter(
+    sorter = new ShuffleExternalSorter(
       memoryManager,
       shuffleMemoryManager,
       blockManager,
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index c32998345145..704158bfc764 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -330,7 +330,7 @@ object SparkEnv extends Logging {
     val shortShuffleMgrNames = Map(
       "hash" -> "org.apache.spark.shuffle.hash.HashShuffleManager",
       "sort" -> "org.apache.spark.shuffle.sort.SortShuffleManager",
-      "tungsten-sort" -> "org.apache.spark.shuffle.unsafe.UnsafeShuffleManager")
+      "tungsten-sort" -> "org.apache.spark.shuffle.sort.SortShuffleManager")
     val shuffleMgrName = conf.get("spark.shuffle.manager", "sort")
     val shuffleMgrClass = shortShuffleMgrNames.getOrElse(shuffleMgrName.toLowerCase, shuffleMgrName)
     val shuffleManager = instantiateClass[ShuffleManager](shuffleMgrClass)
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
index 9df4e551669c..1105167d39d8 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
@@ -19,9 +19,53 @@ package org.apache.spark.shuffle.sort
 
 import java.util.concurrent.ConcurrentHashMap
 
-import org.apache.spark.{Logging, SparkConf, TaskContext, ShuffleDependency}
+import org.apache.spark._
+import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle._
 
+/**
+ * In sort-based shuffle, incoming records are sorted according to their target partition ids, then
+ * written to a single map output file. Reducers fetch contiguous regions of this file in order to
+ * read their portion of the map output. In cases where the map output data is too large to fit in
+ * memory, sorted subsets of the output can are spilled to disk and those on-disk files are merged
+ * to produce the final output file.
+ *
+ * Sort-based shuffle has two different write paths for producing its map output files:
+ *
+ *  - Serialized sorting: used when all three of the following conditions hold:
+ *    1. The shuffle dependency specifies no aggregation or output ordering.
+ *    2. The shuffle serializer supports relocation of serialized values (this is currently
+ *       supported by KryoSerializer and Spark SQL's custom serializers).
+ *    3. The shuffle produces fewer than 16777216 output partitions.
+ *  - Deserialized sorting: used to handle all other cases.
+ *
+ * -----------------------
+ * Serialized sorting mode
+ * -----------------------
+ *
+ * In the serialized sorting mode, incoming records are serialized as soon as they are passed to the
+ * shuffle writer and are buffered in a serialized form during sorting. This write path implements
+ * several optimizations:
+ *
+ *  - Its sort operates on serialized binary data rather than Java objects, which reduces memory
+ *    consumption and GC overheads. This optimization requires the record serializer to have certain
+ *    properties to allow serialized records to be re-ordered without requiring deserialization.
+ *    See SPARK-4550, where this optimization was first proposed and implemented, for more details.
+ *
+ *  - It uses a specialized cache-efficient sorter ([[ShuffleExternalSorter]]) that sorts
+ *    arrays of compressed record pointers and partition ids. By using only 8 bytes of space per
+ *    record in the sorting array, this fits more of the array into cache.
+ *
+ *  - The spill merging procedure operates on blocks of serialized records that belong to the same
+ *    partition and does not need to deserialize records during the merge.
+ *
+ *  - When the spill compression codec supports concatenation of compressed data, the spill merge
+ *    simply concatenates the serialized and compressed spill partitions to produce the final output
+ *    partition.  This allows efficient data copying methods, like NIO's `transferTo`, to be used
+ *    and avoids the need to allocate decompression or copying buffers during the merge.
+ *
+ * For more details on these optimizations, see SPARK-7081.
+ */
 private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager with Logging {
 
   if (!conf.getBoolean("spark.shuffle.spill", true)) {
@@ -30,8 +74,12 @@ private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager
         " Shuffle will continue to spill to disk when necessary.")
   }
 
-  private val indexShuffleBlockResolver = new IndexShuffleBlockResolver(conf)
-  private val shuffleMapNumber = new ConcurrentHashMap[Int, Int]()
+  /**
+   * A mapping from shuffle ids to the number of mappers producing output for those shuffles.
+   */
+  private[this] val numMapsForShuffle = new ConcurrentHashMap[Int, Int]()
+
+  override val shuffleBlockResolver = new IndexShuffleBlockResolver(conf)
 
   /**
    * Register a shuffle with the manager and obtain a handle for it to pass to tasks.
@@ -40,7 +88,22 @@ private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager
       shuffleId: Int,
       numMaps: Int,
       dependency: ShuffleDependency[K, V, C]): ShuffleHandle = {
-    new BaseShuffleHandle(shuffleId, numMaps, dependency)
+    if (SortShuffleWriter.shouldBypassMergeSort(SparkEnv.get.conf, dependency)) {
+      // If there are fewer than spark.shuffle.sort.bypassMergeThreshold partitions and we don't
+      // need map-side aggregation, then write numPartitions files directly and just concatenate
+      // them at the end. This avoids doing serialization and deserialization twice to merge
+      // together the spilled files, which would happen with the normal code path. The downside is
+      // having multiple files open at a time and thus more memory allocated to buffers.
+      new BypassMergeSortShuffleHandle[K, V](
+        shuffleId, numMaps, dependency.asInstanceOf[ShuffleDependency[K, V, V]])
+    } else if (SortShuffleManager.canUseSerializedShuffle(dependency)) {
+      // Otherwise, try to buffer map outputs in a serialized form, since this is more efficient:
+      new SerializedShuffleHandle[K, V](
+        shuffleId, numMaps, dependency.asInstanceOf[ShuffleDependency[K, V, V]])
+    } else {
+      // Otherwise, buffer map outputs in a deserialized form:
+      new BaseShuffleHandle(shuffleId, numMaps, dependency)
+    }
   }
 
   /**
@@ -52,38 +115,114 @@ private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager
       startPartition: Int,
       endPartition: Int,
       context: TaskContext): ShuffleReader[K, C] = {
-    // We currently use the same block store shuffle fetcher as the hash-based shuffle.
     new BlockStoreShuffleReader(
       handle.asInstanceOf[BaseShuffleHandle[K, _, C]], startPartition, endPartition, context)
   }
 
   /** Get a writer for a given partition. Called on executors by map tasks. */
-  override def getWriter[K, V](handle: ShuffleHandle, mapId: Int, context: TaskContext)
-      : ShuffleWriter[K, V] = {
-    val baseShuffleHandle = handle.asInstanceOf[BaseShuffleHandle[K, V, _]]
-    shuffleMapNumber.putIfAbsent(baseShuffleHandle.shuffleId, baseShuffleHandle.numMaps)
-    new SortShuffleWriter(
-      shuffleBlockResolver, baseShuffleHandle, mapId, context)
+  override def getWriter[K, V](
+      handle: ShuffleHandle,
+      mapId: Int,
+      context: TaskContext): ShuffleWriter[K, V] = {
+    numMapsForShuffle.putIfAbsent(
+      handle.shuffleId, handle.asInstanceOf[BaseShuffleHandle[_, _, _]].numMaps)
+    val env = SparkEnv.get
+    handle match {
+      case unsafeShuffleHandle: SerializedShuffleHandle[K @unchecked, V @unchecked] =>
+        new UnsafeShuffleWriter(
+          env.blockManager,
+          shuffleBlockResolver.asInstanceOf[IndexShuffleBlockResolver],
+          context.taskMemoryManager(),
+          env.shuffleMemoryManager,
+          unsafeShuffleHandle,
+          mapId,
+          context,
+          env.conf)
+      case bypassMergeSortHandle: BypassMergeSortShuffleHandle[K @unchecked, V @unchecked] =>
+        new BypassMergeSortShuffleWriter(
+          env.blockManager,
+          shuffleBlockResolver.asInstanceOf[IndexShuffleBlockResolver],
+          bypassMergeSortHandle,
+          mapId,
+          context,
+          env.conf)
+      case other: BaseShuffleHandle[K @unchecked, V @unchecked, _] =>
+        new SortShuffleWriter(shuffleBlockResolver, other, mapId, context)
+    }
   }
 
   /** Remove a shuffle's metadata from the ShuffleManager. */
   override def unregisterShuffle(shuffleId: Int): Boolean = {
-    if (shuffleMapNumber.containsKey(shuffleId)) {
-      val numMaps = shuffleMapNumber.remove(shuffleId)
-      (0 until numMaps).map{ mapId =>
+    Option(numMapsForShuffle.remove(shuffleId)).foreach { numMaps =>
+      (0 until numMaps).foreach { mapId =>
         shuffleBlockResolver.removeDataByMap(shuffleId, mapId)
       }
     }
     true
   }
 
-  override val shuffleBlockResolver: IndexShuffleBlockResolver = {
-    indexShuffleBlockResolver
-  }
-
   /** Shut down this ShuffleManager. */
   override def stop(): Unit = {
     shuffleBlockResolver.stop()
   }
 }
 
+
+private[spark] object SortShuffleManager extends Logging {
+
+  /**
+   * The maximum number of shuffle output partitions that SortShuffleManager supports when
+   * buffering map outputs in a serialized form. This is an extreme defensive programming measure,
+   * since it's extremely unlikely that a single shuffle produces over 16 million output partitions.
+   * */
+  val MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE =
+    PackedRecordPointer.MAXIMUM_PARTITION_ID + 1
+
+  /**
+   * Helper method for determining whether a shuffle should use an optimized serialized shuffle
+   * path or whether it should fall back to the original path that operates on deserialized objects.
+   */
+  def canUseSerializedShuffle(dependency: ShuffleDependency[_, _, _]): Boolean = {
+    val shufId = dependency.shuffleId
+    val numPartitions = dependency.partitioner.numPartitions
+    val serializer = Serializer.getSerializer(dependency.serializer)
+    if (!serializer.supportsRelocationOfSerializedObjects) {
+      log.debug(s"Can't use serialized shuffle for shuffle $shufId because the serializer, " +
+        s"${serializer.getClass.getName}, does not support object relocation")
+      false
+    } else if (dependency.aggregator.isDefined) {
+      log.debug(
+        s"Can't use serialized shuffle for shuffle $shufId because an aggregator is defined")
+      false
+    } else if (numPartitions > MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE) {
+      log.debug(s"Can't use serialized shuffle for shuffle $shufId because it has more than " +
+        s"$MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE partitions")
+      false
+    } else {
+      log.debug(s"Can use serialized shuffle for shuffle $shufId")
+      true
+    }
+  }
+}
+
+/**
+ * Subclass of [[BaseShuffleHandle]], used to identify when we've chosen to use the
+ * serialized shuffle.
+ */
+private[spark] class SerializedShuffleHandle[K, V](
+  shuffleId: Int,
+  numMaps: Int,
+  dependency: ShuffleDependency[K, V, V])
+  extends BaseShuffleHandle(shuffleId, numMaps, dependency) {
+}
+
+/**
+ * Subclass of [[BaseShuffleHandle]], used to identify when we've chosen to use the
+ * bypass merge sort shuffle path.
+ */
+private[spark] class BypassMergeSortShuffleHandle[K, V](
+  shuffleId: Int,
+  numMaps: Int,
+  dependency: ShuffleDependency[K, V, V])
+  extends BaseShuffleHandle(shuffleId, numMaps, dependency) {
+}
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
index 5865e7640c1c..bbd9c1ab53cd 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
@@ -20,7 +20,6 @@ package org.apache.spark.shuffle.sort
 import org.apache.spark._
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.scheduler.MapStatus
-import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.{IndexShuffleBlockResolver, ShuffleWriter, BaseShuffleHandle}
 import org.apache.spark.storage.ShuffleBlockId
 import org.apache.spark.util.collection.ExternalSorter
@@ -36,7 +35,7 @@ private[spark] class SortShuffleWriter[K, V, C](
 
   private val blockManager = SparkEnv.get.blockManager
 
-  private var sorter: SortShuffleFileWriter[K, V] = null
+  private var sorter: ExternalSorter[K, V, _] = null
 
   // Are we in the process of stopping? Because map tasks can call stop() with success = true
   // and then call stop() with success = false if they get an exception, we want to make sure
@@ -54,15 +53,6 @@ private[spark] class SortShuffleWriter[K, V, C](
       require(dep.aggregator.isDefined, "Map-side combine without Aggregator specified!")
       new ExternalSorter[K, V, C](
         dep.aggregator, Some(dep.partitioner), dep.keyOrdering, dep.serializer)
-    } else if (SortShuffleWriter.shouldBypassMergeSort(
-        SparkEnv.get.conf, dep.partitioner.numPartitions, aggregator = None, keyOrdering = None)) {
-      // If there are fewer than spark.shuffle.sort.bypassMergeThreshold partitions and we don't
-      // need local aggregation and sorting, write numPartitions files directly and just concatenate
-      // them at the end. This avoids doing serialization and deserialization twice to merge
-      // together the spilled files, which would happen with the normal code path. The downside is
-      // having multiple files open at a time and thus more memory allocated to buffers.
-      new BypassMergeSortShuffleWriter[K, V](SparkEnv.get.conf, blockManager, dep.partitioner,
-        writeMetrics, Serializer.getSerializer(dep.serializer))
     } else {
       // In this case we pass neither an aggregator nor an ordering to the sorter, because we don't
       // care whether the keys get sorted in each partition; that will be done on the reduce side
@@ -111,12 +101,14 @@ private[spark] class SortShuffleWriter[K, V, C](
 }
 
 private[spark] object SortShuffleWriter {
-  def shouldBypassMergeSort(
-      conf: SparkConf,
-      numPartitions: Int,
-      aggregator: Option[Aggregator[_, _, _]],
-      keyOrdering: Option[Ordering[_]]): Boolean = {
-    val bypassMergeThreshold: Int = conf.getInt("spark.shuffle.sort.bypassMergeThreshold", 200)
-    numPartitions <= bypassMergeThreshold && aggregator.isEmpty && keyOrdering.isEmpty
+  def shouldBypassMergeSort(conf: SparkConf, dep: ShuffleDependency[_, _, _]): Boolean = {
+    // We cannot bypass sorting if we need to do map-side aggregation.
+    if (dep.mapSideCombine) {
+      require(dep.aggregator.isDefined, "Map-side combine without Aggregator specified!")
+      false
+    } else {
+      val bypassMergeThreshold: Int = conf.getInt("spark.shuffle.sort.bypassMergeThreshold", 200)
+      dep.partitioner.numPartitions <= bypassMergeThreshold
+    }
   }
 }
diff --git a/core/src/main/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManager.scala
deleted file mode 100644
index 75f22f642b9d..000000000000
--- a/core/src/main/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManager.scala
+++ /dev/null
@@ -1,202 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle.unsafe
-
-import java.util.Collections
-import java.util.concurrent.ConcurrentHashMap
-
-import org.apache.spark._
-import org.apache.spark.serializer.Serializer
-import org.apache.spark.shuffle._
-import org.apache.spark.shuffle.sort.SortShuffleManager
-
-/**
- * Subclass of [[BaseShuffleHandle]], used to identify when we've chosen to use the new shuffle.
- */
-private[spark] class UnsafeShuffleHandle[K, V](
-    shuffleId: Int,
-    numMaps: Int,
-    dependency: ShuffleDependency[K, V, V])
-  extends BaseShuffleHandle(shuffleId, numMaps, dependency) {
-}
-
-private[spark] object UnsafeShuffleManager extends Logging {
-
-  /**
-   * The maximum number of shuffle output partitions that UnsafeShuffleManager supports.
-   */
-  val MAX_SHUFFLE_OUTPUT_PARTITIONS = PackedRecordPointer.MAXIMUM_PARTITION_ID + 1
-
-  /**
-   * Helper method for determining whether a shuffle should use the optimized unsafe shuffle
-   * path or whether it should fall back to the original sort-based shuffle.
-   */
-  def canUseUnsafeShuffle[K, V, C](dependency: ShuffleDependency[K, V, C]): Boolean = {
-    val shufId = dependency.shuffleId
-    val serializer = Serializer.getSerializer(dependency.serializer)
-    if (!serializer.supportsRelocationOfSerializedObjects) {
-      log.debug(s"Can't use UnsafeShuffle for shuffle $shufId because the serializer, " +
-        s"${serializer.getClass.getName}, does not support object relocation")
-      false
-    } else if (dependency.aggregator.isDefined) {
-      log.debug(s"Can't use UnsafeShuffle for shuffle $shufId because an aggregator is defined")
-      false
-    } else if (dependency.partitioner.numPartitions > MAX_SHUFFLE_OUTPUT_PARTITIONS) {
-      log.debug(s"Can't use UnsafeShuffle for shuffle $shufId because it has more than " +
-        s"$MAX_SHUFFLE_OUTPUT_PARTITIONS partitions")
-      false
-    } else {
-      log.debug(s"Can use UnsafeShuffle for shuffle $shufId")
-      true
-    }
-  }
-}
-
-/**
- * A shuffle implementation that uses directly-managed memory to implement several performance
- * optimizations for certain types of shuffles. In cases where the new performance optimizations
- * cannot be applied, this shuffle manager delegates to [[SortShuffleManager]] to handle those
- * shuffles.
- *
- * UnsafeShuffleManager's optimizations will apply when _all_ of the following conditions hold:
- *
- *  - The shuffle dependency specifies no aggregation or output ordering.
- *  - The shuffle serializer supports relocation of serialized values (this is currently supported
- *    by KryoSerializer and Spark SQL's custom serializers).
- *  - The shuffle produces fewer than 16777216 output partitions.
- *  - No individual record is larger than 128 MB when serialized.
- *
- * In addition, extra spill-merging optimizations are automatically applied when the shuffle
- * compression codec supports concatenation of serialized streams. This is currently supported by
- * Spark's LZF serializer.
- *
- * At a high-level, UnsafeShuffleManager's design is similar to Spark's existing SortShuffleManager.
- * In sort-based shuffle, incoming records are sorted according to their target partition ids, then
- * written to a single map output file. Reducers fetch contiguous regions of this file in order to
- * read their portion of the map output. In cases where the map output data is too large to fit in
- * memory, sorted subsets of the output can are spilled to disk and those on-disk files are merged
- * to produce the final output file.
- *
- * UnsafeShuffleManager optimizes this process in several ways:
- *
- *  - Its sort operates on serialized binary data rather than Java objects, which reduces memory
- *    consumption and GC overheads. This optimization requires the record serializer to have certain
- *    properties to allow serialized records to be re-ordered without requiring deserialization.
- *    See SPARK-4550, where this optimization was first proposed and implemented, for more details.
- *
- *  - It uses a specialized cache-efficient sorter ([[UnsafeShuffleExternalSorter]]) that sorts
- *    arrays of compressed record pointers and partition ids. By using only 8 bytes of space per
- *    record in the sorting array, this fits more of the array into cache.
- *
- *  - The spill merging procedure operates on blocks of serialized records that belong to the same
- *    partition and does not need to deserialize records during the merge.
- *
- *  - When the spill compression codec supports concatenation of compressed data, the spill merge
- *    simply concatenates the serialized and compressed spill partitions to produce the final output
- *    partition.  This allows efficient data copying methods, like NIO's `transferTo`, to be used
- *    and avoids the need to allocate decompression or copying buffers during the merge.
- *
- * For more details on UnsafeShuffleManager's design, see SPARK-7081.
- */
-private[spark] class UnsafeShuffleManager(conf: SparkConf) extends ShuffleManager with Logging {
-
-  if (!conf.getBoolean("spark.shuffle.spill", true)) {
-    logWarning(
-      "spark.shuffle.spill was set to false, but this is ignored by the tungsten-sort shuffle " +
-      "manager; its optimized shuffles will continue to spill to disk when necessary.")
-  }
-
-  private[this] val sortShuffleManager: SortShuffleManager = new SortShuffleManager(conf)
-  private[this] val shufflesThatFellBackToSortShuffle =
-    Collections.newSetFromMap(new ConcurrentHashMap[Int, java.lang.Boolean]())
-  private[this] val numMapsForShufflesThatUsedNewPath = new ConcurrentHashMap[Int, Int]()
-
-  /**
-   * Register a shuffle with the manager and obtain a handle for it to pass to tasks.
-   */
-  override def registerShuffle[K, V, C](
-      shuffleId: Int,
-      numMaps: Int,
-      dependency: ShuffleDependency[K, V, C]): ShuffleHandle = {
-    if (UnsafeShuffleManager.canUseUnsafeShuffle(dependency)) {
-      new UnsafeShuffleHandle[K, V](
-        shuffleId, numMaps, dependency.asInstanceOf[ShuffleDependency[K, V, V]])
-    } else {
-      new BaseShuffleHandle(shuffleId, numMaps, dependency)
-    }
-  }
-
-  /**
-   * Get a reader for a range of reduce partitions (startPartition to endPartition-1, inclusive).
-   * Called on executors by reduce tasks.
-   */
-  override def getReader[K, C](
-      handle: ShuffleHandle,
-      startPartition: Int,
-      endPartition: Int,
-      context: TaskContext): ShuffleReader[K, C] = {
-    sortShuffleManager.getReader(handle, startPartition, endPartition, context)
-  }
-
-  /** Get a writer for a given partition. Called on executors by map tasks. */
-  override def getWriter[K, V](
-      handle: ShuffleHandle,
-      mapId: Int,
-      context: TaskContext): ShuffleWriter[K, V] = {
-    handle match {
-      case unsafeShuffleHandle: UnsafeShuffleHandle[K @unchecked, V @unchecked] =>
-        numMapsForShufflesThatUsedNewPath.putIfAbsent(handle.shuffleId, unsafeShuffleHandle.numMaps)
-        val env = SparkEnv.get
-        new UnsafeShuffleWriter(
-          env.blockManager,
-          shuffleBlockResolver.asInstanceOf[IndexShuffleBlockResolver],
-          context.taskMemoryManager(),
-          env.shuffleMemoryManager,
-          unsafeShuffleHandle,
-          mapId,
-          context,
-          env.conf)
-      case other =>
-        shufflesThatFellBackToSortShuffle.add(handle.shuffleId)
-        sortShuffleManager.getWriter(handle, mapId, context)
-    }
-  }
-
-  /** Remove a shuffle's metadata from the ShuffleManager. */
-  override def unregisterShuffle(shuffleId: Int): Boolean = {
-    if (shufflesThatFellBackToSortShuffle.remove(shuffleId)) {
-      sortShuffleManager.unregisterShuffle(shuffleId)
-    } else {
-      Option(numMapsForShufflesThatUsedNewPath.remove(shuffleId)).foreach { numMaps =>
-        (0 until numMaps).foreach { mapId =>
-          shuffleBlockResolver.removeDataByMap(shuffleId, mapId)
-        }
-      }
-      true
-    }
-  }
-
-  override val shuffleBlockResolver: IndexShuffleBlockResolver = {
-    sortShuffleManager.shuffleBlockResolver
-  }
-
-  /** Shut down this ShuffleManager. */
-  override def stop(): Unit = {
-    sortShuffleManager.stop()
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ChainedBuffer.scala b/core/src/main/scala/org/apache/spark/util/collection/ChainedBuffer.scala
deleted file mode 100644
index ae60f3b0cb55..000000000000
--- a/core/src/main/scala/org/apache/spark/util/collection/ChainedBuffer.scala
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.util.collection
-
-import java.io.OutputStream
-
-import scala.collection.mutable.ArrayBuffer
-
-/**
- * A logical byte buffer that wraps a list of byte arrays. All the byte arrays have equal size. The
- * advantage of this over a standard ArrayBuffer is that it can grow without claiming large amounts
- * of memory and needing to copy the full contents. The disadvantage is that the contents don't
- * occupy a contiguous segment of memory.
- */
-private[spark] class ChainedBuffer(chunkSize: Int) {
-
-  private val chunkSizeLog2: Int = java.lang.Long.numberOfTrailingZeros(
-    java.lang.Long.highestOneBit(chunkSize))
-  assert((1 << chunkSizeLog2) == chunkSize,
-    s"ChainedBuffer chunk size $chunkSize must be a power of two")
-  private val chunks: ArrayBuffer[Array[Byte]] = new ArrayBuffer[Array[Byte]]()
-  private var _size: Long = 0
-
-  /**
-   * Feed bytes from this buffer into a DiskBlockObjectWriter.
-   *
-   * @param pos Offset in the buffer to read from.
-   * @param os OutputStream to read into.
-   * @param len Number of bytes to read.
-   */
-  def read(pos: Long, os: OutputStream, len: Int): Unit = {
-    if (pos + len > _size) {
-      throw new IndexOutOfBoundsException(
-        s"Read of $len bytes at position $pos would go past size ${_size} of buffer")
-    }
-    var chunkIndex: Int = (pos >> chunkSizeLog2).toInt
-    var posInChunk: Int = (pos - (chunkIndex.toLong << chunkSizeLog2)).toInt
-    var written: Int = 0
-    while (written < len) {
-      val toRead: Int = math.min(len - written, chunkSize - posInChunk)
-      os.write(chunks(chunkIndex), posInChunk, toRead)
-      written += toRead
-      chunkIndex += 1
-      posInChunk = 0
-    }
-  }
-
-  /**
-   * Read bytes from this buffer into a byte array.
-   *
-   * @param pos Offset in the buffer to read from.
-   * @param bytes Byte array to read into.
-   * @param offs Offset in the byte array to read to.
-   * @param len Number of bytes to read.
-   */
-  def read(pos: Long, bytes: Array[Byte], offs: Int, len: Int): Unit = {
-    if (pos + len > _size) {
-      throw new IndexOutOfBoundsException(
-        s"Read of $len bytes at position $pos would go past size of buffer")
-    }
-    var chunkIndex: Int = (pos >> chunkSizeLog2).toInt
-    var posInChunk: Int = (pos - (chunkIndex.toLong << chunkSizeLog2)).toInt
-    var written: Int = 0
-    while (written < len) {
-      val toRead: Int = math.min(len - written, chunkSize - posInChunk)
-      System.arraycopy(chunks(chunkIndex), posInChunk, bytes, offs + written, toRead)
-      written += toRead
-      chunkIndex += 1
-      posInChunk = 0
-    }
-  }
-
-  /**
-   * Write bytes from a byte array into this buffer.
-   *
-   * @param pos Offset in the buffer to write to.
-   * @param bytes Byte array to write from.
-   * @param offs Offset in the byte array to write from.
-   * @param len Number of bytes to write.
-   */
-  def write(pos: Long, bytes: Array[Byte], offs: Int, len: Int): Unit = {
-    if (pos > _size) {
-      throw new IndexOutOfBoundsException(
-        s"Write at position $pos starts after end of buffer ${_size}")
-    }
-    // Grow if needed
-    val endChunkIndex: Int = ((pos + len - 1) >> chunkSizeLog2).toInt
-    while (endChunkIndex >= chunks.length) {
-      chunks += new Array[Byte](chunkSize)
-    }
-
-    var chunkIndex: Int = (pos >> chunkSizeLog2).toInt
-    var posInChunk: Int = (pos - (chunkIndex.toLong << chunkSizeLog2)).toInt
-    var written: Int = 0
-    while (written < len) {
-      val toWrite: Int = math.min(len - written, chunkSize - posInChunk)
-      System.arraycopy(bytes, offs + written, chunks(chunkIndex), posInChunk, toWrite)
-      written += toWrite
-      chunkIndex += 1
-      posInChunk = 0
-    }
-
-    _size = math.max(_size, pos + len)
-  }
-
-  /**
-   * Total size of buffer that can be written to without allocating additional memory.
-   */
-  def capacity: Long = chunks.size.toLong * chunkSize
-
-  /**
-   * Size of the logical buffer.
-   */
-  def size: Long = _size
-}
-
-/**
- * Output stream that writes to a ChainedBuffer.
- */
-private[spark] class ChainedBufferOutputStream(chainedBuffer: ChainedBuffer) extends OutputStream {
-  private var pos: Long = 0
-
-  override def write(b: Int): Unit = {
-    throw new UnsupportedOperationException()
-  }
-
-  override def write(bytes: Array[Byte], offs: Int, len: Int): Unit = {
-    chainedBuffer.write(pos, bytes, offs, len)
-    pos += len
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index 749be34d8e8f..c48c453a90d0 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -29,7 +29,6 @@ import com.google.common.io.ByteStreams
 import org.apache.spark._
 import org.apache.spark.serializer._
 import org.apache.spark.executor.ShuffleWriteMetrics
-import org.apache.spark.shuffle.sort.{SortShuffleFileWriter, SortShuffleWriter}
 import org.apache.spark.storage.{BlockId, DiskBlockObjectWriter}
 
 /**
@@ -69,8 +68,8 @@ import org.apache.spark.storage.{BlockId, DiskBlockObjectWriter}
  * At a high level, this class works internally as follows:
  *
  * - We repeatedly fill up buffers of in-memory data, using either a PartitionedAppendOnlyMap if
- *   we want to combine by key, or a PartitionedSerializedPairBuffer or PartitionedPairBuffer if we
- *   don't. Inside these buffers, we sort elements by partition ID and then possibly also by key.
+ *   we want to combine by key, or a PartitionedPairBuffer if we don't.
+ *   Inside these buffers, we sort elements by partition ID and then possibly also by key.
  *   To avoid calling the partitioner multiple times with each key, we store the partition ID
  *   alongside each record.
  *
@@ -93,8 +92,7 @@ private[spark] class ExternalSorter[K, V, C](
     ordering: Option[Ordering[K]] = None,
     serializer: Option[Serializer] = None)
   extends Logging
-  with Spillable[WritablePartitionedPairCollection[K, C]]
-  with SortShuffleFileWriter[K, V] {
+  with Spillable[WritablePartitionedPairCollection[K, C]] {
 
   private val conf = SparkEnv.get.conf
 
@@ -104,13 +102,6 @@ private[spark] class ExternalSorter[K, V, C](
     if (shouldPartition) partitioner.get.getPartition(key) else 0
   }
 
-  // Since SPARK-7855, bypassMergeSort optimization is no longer performed as part of this class.
-  // As a sanity check, make sure that we're not handling a shuffle which should use that path.
-  if (SortShuffleWriter.shouldBypassMergeSort(conf, numPartitions, aggregator, ordering)) {
-    throw new IllegalArgumentException("ExternalSorter should not be used to handle "
-      + " a sort that the BypassMergeSortShuffleWriter should handle")
-  }
-
   private val blockManager = SparkEnv.get.blockManager
   private val diskBlockManager = blockManager.diskBlockManager
   private val ser = Serializer.getSerializer(serializer)
@@ -128,23 +119,11 @@ private[spark] class ExternalSorter[K, V, C](
   // grow internal data structures by growing + copying every time the number of objects doubles.
   private val serializerBatchSize = conf.getLong("spark.shuffle.spill.batchSize", 10000)
 
-  private val useSerializedPairBuffer =
-    ordering.isEmpty &&
-      conf.getBoolean("spark.shuffle.sort.serializeMapOutputs", true) &&
-      ser.supportsRelocationOfSerializedObjects
-  private val kvChunkSize = conf.getInt("spark.shuffle.sort.kvChunkSize", 1 << 22) // 4 MB
-  private def newBuffer(): WritablePartitionedPairCollection[K, C] with SizeTracker = {
-    if (useSerializedPairBuffer) {
-      new PartitionedSerializedPairBuffer(metaInitialRecords = 256, kvChunkSize, serInstance)
-    } else {
-      new PartitionedPairBuffer[K, C]
-    }
-  }
   // Data structures to store in-memory objects before we spill. Depending on whether we have an
   // Aggregator set, we either put objects into an AppendOnlyMap where we combine them, or we
   // store them in an array buffer.
   private var map = new PartitionedAppendOnlyMap[K, C]
-  private var buffer = newBuffer()
+  private var buffer = new PartitionedPairBuffer[K, C]
 
   // Total spilling statistics
   private var _diskBytesSpilled = 0L
@@ -192,7 +171,7 @@ private[spark] class ExternalSorter[K, V, C](
    */
   private[spark] def numSpills: Int = spills.size
 
-  override def insertAll(records: Iterator[Product2[K, V]]): Unit = {
+  def insertAll(records: Iterator[Product2[K, V]]): Unit = {
     // TODO: stop combining if we find that the reduction factor isn't high
     val shouldCombine = aggregator.isDefined
 
@@ -236,7 +215,7 @@ private[spark] class ExternalSorter[K, V, C](
     } else {
       estimatedSize = buffer.estimateSize()
       if (maybeSpill(buffer, estimatedSize)) {
-        buffer = newBuffer()
+        buffer = new PartitionedPairBuffer[K, C]
       }
     }
 
@@ -659,7 +638,7 @@ private[spark] class ExternalSorter[K, V, C](
    * @param context a TaskContext for a running Spark task, for us to update shuffle metrics.
    * @return array of lengths, in bytes, of each partition of the file (used by map output tracker)
    */
-  override def writePartitionedFile(
+  def writePartitionedFile(
       blockId: BlockId,
       context: TaskContext,
       outputFile: File): Array[Long] = {
diff --git a/core/src/main/scala/org/apache/spark/util/collection/PartitionedSerializedPairBuffer.scala b/core/src/main/scala/org/apache/spark/util/collection/PartitionedSerializedPairBuffer.scala
deleted file mode 100644
index 87a786b02d65..000000000000
--- a/core/src/main/scala/org/apache/spark/util/collection/PartitionedSerializedPairBuffer.scala
+++ /dev/null
@@ -1,273 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.util.collection
-
-import java.io.InputStream
-import java.nio.IntBuffer
-import java.util.Comparator
-
-import org.apache.spark.serializer.{JavaSerializerInstance, SerializerInstance}
-import org.apache.spark.storage.DiskBlockObjectWriter
-import org.apache.spark.util.collection.PartitionedSerializedPairBuffer._
-
-/**
- * Append-only buffer of key-value pairs, each with a corresponding partition ID, that serializes
- * its records upon insert and stores them as raw bytes.
- *
- * We use two data-structures to store the contents. The serialized records are stored in a
- * ChainedBuffer that can expand gracefully as records are added. This buffer is accompanied by a
- * metadata buffer that stores pointers into the data buffer as well as the partition ID of each
- * record. Each entry in the metadata buffer takes up a fixed amount of space.
- *
- * Sorting the collection means swapping entries in the metadata buffer - the record buffer need not
- * be modified at all. Storing the partition IDs in the metadata buffer means that comparisons can
- * happen without following any pointers, which should minimize cache misses.
- *
- * Currently, only sorting by partition is supported.
- *
- * Each record is laid out inside the the metaBuffer as follows. keyStart, a long, is split across
- * two integers:
- *
- *   +-------------+------------+------------+-------------+
- *   |         keyStart         | keyValLen  | partitionId |
- *   +-------------+------------+------------+-------------+
- *
- * The buffer can support up to `536870911 (2 ^ 29 - 1)` records.
- *
- * @param metaInitialRecords The initial number of entries in the metadata buffer.
- * @param kvBlockSize The size of each byte buffer in the ChainedBuffer used to store the records.
- * @param serializerInstance the serializer used for serializing inserted records.
- */
-private[spark] class PartitionedSerializedPairBuffer[K, V](
-    metaInitialRecords: Int,
-    kvBlockSize: Int,
-    serializerInstance: SerializerInstance)
-  extends WritablePartitionedPairCollection[K, V] with SizeTracker {
-
-  if (serializerInstance.isInstanceOf[JavaSerializerInstance]) {
-    throw new IllegalArgumentException("PartitionedSerializedPairBuffer does not support" +
-      " Java-serialized objects.")
-  }
-
-  require(metaInitialRecords <= MAXIMUM_RECORDS,
-    s"Can't make capacity bigger than ${MAXIMUM_RECORDS} records")
-  private var metaBuffer = IntBuffer.allocate(metaInitialRecords * RECORD_SIZE)
-
-  private val kvBuffer: ChainedBuffer = new ChainedBuffer(kvBlockSize)
-  private val kvOutputStream = new ChainedBufferOutputStream(kvBuffer)
-  private val kvSerializationStream = serializerInstance.serializeStream(kvOutputStream)
-
-  def insert(partition: Int, key: K, value: V): Unit = {
-    if (metaBuffer.position == metaBuffer.capacity) {
-      growMetaBuffer()
-    }
-
-    val keyStart = kvBuffer.size
-    kvSerializationStream.writeKey[Any](key)
-    kvSerializationStream.writeValue[Any](value)
-    kvSerializationStream.flush()
-    val keyValLen = (kvBuffer.size - keyStart).toInt
-
-    // keyStart, a long, gets split across two ints
-    metaBuffer.put(keyStart.toInt)
-    metaBuffer.put((keyStart >> 32).toInt)
-    metaBuffer.put(keyValLen)
-    metaBuffer.put(partition)
-  }
-
-  /** Double the size of the array because we've reached capacity */
-  private def growMetaBuffer(): Unit = {
-    if (metaBuffer.capacity >= MAXIMUM_META_BUFFER_CAPACITY) {
-      throw new IllegalStateException(s"Can't insert more than ${MAXIMUM_RECORDS} records")
-    }
-    val newCapacity =
-      if (metaBuffer.capacity * 2 < 0 || metaBuffer.capacity * 2 > MAXIMUM_META_BUFFER_CAPACITY) {
-        // Overflow
-        MAXIMUM_META_BUFFER_CAPACITY
-      } else {
-        metaBuffer.capacity * 2
-      }
-    val newMetaBuffer = IntBuffer.allocate(newCapacity)
-    newMetaBuffer.put(metaBuffer.array)
-    metaBuffer = newMetaBuffer
-  }
-
-  /** Iterate through the data in a given order. For this class this is not really destructive. */
-  override def partitionedDestructiveSortedIterator(keyComparator: Option[Comparator[K]])
-    : Iterator[((Int, K), V)] = {
-    sort(keyComparator)
-    val is = orderedInputStream
-    val deserStream = serializerInstance.deserializeStream(is)
-    new Iterator[((Int, K), V)] {
-      var metaBufferPos = 0
-      def hasNext: Boolean = metaBufferPos < metaBuffer.position
-      def next(): ((Int, K), V) = {
-        val key = deserStream.readKey[Any]().asInstanceOf[K]
-        val value = deserStream.readValue[Any]().asInstanceOf[V]
-        val partition = metaBuffer.get(metaBufferPos + PARTITION)
-        metaBufferPos += RECORD_SIZE
-        ((partition, key), value)
-      }
-    }
-  }
-
-  override def estimateSize: Long = metaBuffer.capacity * 4L + kvBuffer.capacity
-
-  override def destructiveSortedWritablePartitionedIterator(keyComparator: Option[Comparator[K]])
-    : WritablePartitionedIterator = {
-    sort(keyComparator)
-    new WritablePartitionedIterator {
-      // current position in the meta buffer in ints
-      var pos = 0
-
-      def writeNext(writer: DiskBlockObjectWriter): Unit = {
-        val keyStart = getKeyStartPos(metaBuffer, pos)
-        val keyValLen = metaBuffer.get(pos + KEY_VAL_LEN)
-        pos += RECORD_SIZE
-        kvBuffer.read(keyStart, writer, keyValLen)
-        writer.recordWritten()
-      }
-      def nextPartition(): Int = metaBuffer.get(pos + PARTITION)
-      def hasNext(): Boolean = pos < metaBuffer.position
-    }
-  }
-
-  // Visible for testing
-  def orderedInputStream: OrderedInputStream = {
-    new OrderedInputStream(metaBuffer, kvBuffer)
-  }
-
-  private def sort(keyComparator: Option[Comparator[K]]): Unit = {
-    val comparator = if (keyComparator.isEmpty) {
-      new Comparator[Int]() {
-        def compare(partition1: Int, partition2: Int): Int = {
-          partition1 - partition2
-        }
-      }
-    } else {
-      throw new UnsupportedOperationException()
-    }
-
-    val sorter = new Sorter(new SerializedSortDataFormat)
-    sorter.sort(metaBuffer, 0, metaBuffer.position / RECORD_SIZE, comparator)
-  }
-}
-
-private[spark] class OrderedInputStream(metaBuffer: IntBuffer, kvBuffer: ChainedBuffer)
-    extends InputStream {
-
-  import PartitionedSerializedPairBuffer._
-
-  private var metaBufferPos = 0
-  private var kvBufferPos =
-    if (metaBuffer.position > 0) getKeyStartPos(metaBuffer, metaBufferPos) else 0
-
-  override def read(bytes: Array[Byte]): Int = read(bytes, 0, bytes.length)
-
-  override def read(bytes: Array[Byte], offs: Int, len: Int): Int = {
-    if (metaBufferPos >= metaBuffer.position) {
-      return -1
-    }
-    val bytesRemainingInRecord = (metaBuffer.get(metaBufferPos + KEY_VAL_LEN) -
-      (kvBufferPos - getKeyStartPos(metaBuffer, metaBufferPos))).toInt
-    val toRead = math.min(bytesRemainingInRecord, len)
-    kvBuffer.read(kvBufferPos, bytes, offs, toRead)
-    if (toRead == bytesRemainingInRecord) {
-      metaBufferPos += RECORD_SIZE
-      if (metaBufferPos < metaBuffer.position) {
-        kvBufferPos = getKeyStartPos(metaBuffer, metaBufferPos)
-      }
-    } else {
-      kvBufferPos += toRead
-    }
-    toRead
-  }
-
-  override def read(): Int = {
-    throw new UnsupportedOperationException()
-  }
-}
-
-private[spark] class SerializedSortDataFormat extends SortDataFormat[Int, IntBuffer] {
-
-  private val META_BUFFER_TMP = new Array[Int](RECORD_SIZE)
-
-  /** Return the sort key for the element at the given index. */
-  override protected def getKey(metaBuffer: IntBuffer, pos: Int): Int = {
-    metaBuffer.get(pos * RECORD_SIZE + PARTITION)
-  }
-
-  /** Swap two elements. */
-  override def swap(metaBuffer: IntBuffer, pos0: Int, pos1: Int): Unit = {
-    val iOff = pos0 * RECORD_SIZE
-    val jOff = pos1 * RECORD_SIZE
-    System.arraycopy(metaBuffer.array, iOff, META_BUFFER_TMP, 0, RECORD_SIZE)
-    System.arraycopy(metaBuffer.array, jOff, metaBuffer.array, iOff, RECORD_SIZE)
-    System.arraycopy(META_BUFFER_TMP, 0, metaBuffer.array, jOff, RECORD_SIZE)
-  }
-
-  /** Copy a single element from src(srcPos) to dst(dstPos). */
-  override def copyElement(
-      src: IntBuffer,
-      srcPos: Int,
-      dst: IntBuffer,
-      dstPos: Int): Unit = {
-    val srcOff = srcPos * RECORD_SIZE
-    val dstOff = dstPos * RECORD_SIZE
-    System.arraycopy(src.array, srcOff, dst.array, dstOff, RECORD_SIZE)
-  }
-
-  /**
-   * Copy a range of elements starting at src(srcPos) to dst, starting at dstPos.
-   * Overlapping ranges are allowed.
-   */
-  override def copyRange(
-      src: IntBuffer,
-      srcPos: Int,
-      dst: IntBuffer,
-      dstPos: Int,
-      length: Int): Unit = {
-    val srcOff = srcPos * RECORD_SIZE
-    val dstOff = dstPos * RECORD_SIZE
-    System.arraycopy(src.array, srcOff, dst.array, dstOff, RECORD_SIZE * length)
-  }
-
-  /**
-   * Allocates a Buffer that can hold up to 'length' elements.
-   * All elements of the buffer should be considered invalid until data is explicitly copied in.
-   */
-  override def allocate(length: Int): IntBuffer = {
-    IntBuffer.allocate(length * RECORD_SIZE)
-  }
-}
-
-private object PartitionedSerializedPairBuffer {
-  val KEY_START = 0 // keyStart, a long, gets split across two ints
-  val KEY_VAL_LEN = 2
-  val PARTITION = 3
-  val RECORD_SIZE = PARTITION + 1 // num ints of metadata
-
-  val MAXIMUM_RECORDS = Int.MaxValue / RECORD_SIZE // (2 ^ 29) - 1
-  val MAXIMUM_META_BUFFER_CAPACITY = MAXIMUM_RECORDS * RECORD_SIZE // (2 ^ 31) - 4
-
-  def getKeyStartPos(metaBuffer: IntBuffer, metaBufferPos: Int): Long = {
-    val lower32 = metaBuffer.get(metaBufferPos + KEY_START)
-    val upper32 = metaBuffer.get(metaBufferPos + KEY_START + 1)
-    (upper32.toLong << 32) | (lower32 & 0xFFFFFFFFL)
-  }
-}
diff --git a/core/src/test/java/org/apache/spark/shuffle/unsafe/PackedRecordPointerSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
similarity index 96%
rename from core/src/test/java/org/apache/spark/shuffle/unsafe/PackedRecordPointerSuite.java
rename to core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
index 934b7e03050b..232ae4d926bc 100644
--- a/core/src/test/java/org/apache/spark/shuffle/unsafe/PackedRecordPointerSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
@@ -15,8 +15,9 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
+import org.apache.spark.shuffle.sort.PackedRecordPointer;
 import org.junit.Test;
 import static org.junit.Assert.*;
 
@@ -24,7 +25,7 @@
 import org.apache.spark.unsafe.memory.MemoryAllocator;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.unsafe.memory.TaskMemoryManager;
-import static org.apache.spark.shuffle.unsafe.PackedRecordPointer.*;
+import static org.apache.spark.shuffle.sort.PackedRecordPointer.*;
 
 public class PackedRecordPointerSuite {
 
diff --git a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
similarity index 87%
rename from core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorterSuite.java
rename to core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
index 40fefe2c9d14..1ef3c5ff64ba 100644
--- a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import java.util.Arrays;
 import java.util.Random;
@@ -30,7 +30,7 @@
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.unsafe.memory.TaskMemoryManager;
 
-public class UnsafeShuffleInMemorySorterSuite {
+public class ShuffleInMemorySorterSuite {
 
   private static String getStringFromDataPage(Object baseObject, long baseOffset, int strLength) {
     final byte[] strBytes = new byte[strLength];
@@ -40,8 +40,8 @@ private static String getStringFromDataPage(Object baseObject, long baseOffset,
 
   @Test
   public void testSortingEmptyInput() {
-    final UnsafeShuffleInMemorySorter sorter = new UnsafeShuffleInMemorySorter(100);
-    final UnsafeShuffleInMemorySorter.UnsafeShuffleSorterIterator iter = sorter.getSortedIterator();
+    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(100);
+    final ShuffleInMemorySorter.ShuffleSorterIterator iter = sorter.getSortedIterator();
     assert(!iter.hasNext());
   }
 
@@ -62,7 +62,7 @@ public void testBasicSorting() throws Exception {
       new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
     final MemoryBlock dataPage = memoryManager.allocatePage(2048);
     final Object baseObject = dataPage.getBaseObject();
-    final UnsafeShuffleInMemorySorter sorter = new UnsafeShuffleInMemorySorter(4);
+    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
     final HashPartitioner hashPartitioner = new HashPartitioner(4);
 
     // Write the records into the data page and store pointers into the sorter
@@ -79,7 +79,7 @@ public void testBasicSorting() throws Exception {
     }
 
     // Sort the records
-    final UnsafeShuffleInMemorySorter.UnsafeShuffleSorterIterator iter = sorter.getSortedIterator();
+    final ShuffleInMemorySorter.ShuffleSorterIterator iter = sorter.getSortedIterator();
     int prevPartitionId = -1;
     Arrays.sort(dataToSort);
     for (int i = 0; i < dataToSort.length; i++) {
@@ -103,7 +103,7 @@ public void testBasicSorting() throws Exception {
 
   @Test
   public void testSortingManyNumbers() throws Exception {
-    UnsafeShuffleInMemorySorter sorter = new UnsafeShuffleInMemorySorter(4);
+    ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
     int[] numbersToSort = new int[128000];
     Random random = new Random(16);
     for (int i = 0; i < numbersToSort.length; i++) {
@@ -112,7 +112,7 @@ public void testSortingManyNumbers() throws Exception {
     }
     Arrays.sort(numbersToSort);
     int[] sorterResult = new int[numbersToSort.length];
-    UnsafeShuffleInMemorySorter.UnsafeShuffleSorterIterator iter = sorter.getSortedIterator();
+    ShuffleInMemorySorter.ShuffleSorterIterator iter = sorter.getSortedIterator();
     int j = 0;
     while (iter.hasNext()) {
       iter.loadNext();
diff --git a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
similarity index 98%
rename from core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java
rename to core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
index d218344cd452..29d9823b1f71 100644
--- a/core/src/test/java/org/apache/spark/shuffle/unsafe/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe;
+package org.apache.spark.shuffle.sort;
 
 import java.io.*;
 import java.nio.ByteBuffer;
@@ -23,7 +23,6 @@
 
 import scala.*;
 import scala.collection.Iterator;
-import scala.reflect.ClassTag;
 import scala.runtime.AbstractFunction1;
 
 import com.google.common.collect.Iterators;
@@ -56,6 +55,7 @@
 import org.apache.spark.scheduler.MapStatus;
 import org.apache.spark.shuffle.IndexShuffleBlockResolver;
 import org.apache.spark.shuffle.ShuffleMemoryManager;
+import org.apache.spark.shuffle.sort.SerializedShuffleHandle;
 import org.apache.spark.storage.*;
 import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryAllocator;
@@ -204,7 +204,7 @@ private UnsafeShuffleWriter<Object, Object> createWriter(
       shuffleBlockResolver,
       taskMemoryManager,
       shuffleMemoryManager,
-      new UnsafeShuffleHandle<Object, Object>(0, 1, shuffleDep),
+      new SerializedShuffleHandle<Object, Object>(0, 1, shuffleDep),
       0, // map id
       taskContext,
       conf
@@ -461,7 +461,7 @@ public void writeRecordsThatAreBiggerThanDiskWriteBufferSize() throws Exception
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
     final ArrayList<Product2<Object, Object>> dataToWrite =
       new ArrayList<Product2<Object, Object>>();
-    final byte[] bytes = new byte[(int) (UnsafeShuffleExternalSorter.DISK_WRITE_BUFFER_SIZE * 2.5)];
+    final byte[] bytes = new byte[(int) (ShuffleExternalSorter.DISK_WRITE_BUFFER_SIZE * 2.5)];
     new Random(42).nextBytes(bytes);
     dataToWrite.add(new Tuple2<Object, Object>(1, ByteBuffer.wrap(bytes)));
     writer.write(dataToWrite.iterator());
@@ -516,7 +516,7 @@ public void testPeakMemoryUsed() throws Exception {
         shuffleBlockResolver,
         taskMemoryManager,
         shuffleMemoryManager,
-        new UnsafeShuffleHandle<>(0, 1, shuffleDep),
+        new SerializedShuffleHandle<>(0, 1, shuffleDep),
         0, // map id
         taskContext,
         conf);
diff --git a/core/src/test/scala/org/apache/spark/SortShuffleSuite.scala b/core/src/test/scala/org/apache/spark/SortShuffleSuite.scala
index 63358172ea1f..b8ab227517cc 100644
--- a/core/src/test/scala/org/apache/spark/SortShuffleSuite.scala
+++ b/core/src/test/scala/org/apache/spark/SortShuffleSuite.scala
@@ -17,13 +17,78 @@
 
 package org.apache.spark
 
+import java.io.File
+
+import scala.collection.JavaConverters._
+
+import org.apache.commons.io.FileUtils
+import org.apache.commons.io.filefilter.TrueFileFilter
 import org.scalatest.BeforeAndAfterAll
 
+import org.apache.spark.rdd.ShuffledRDD
+import org.apache.spark.shuffle.sort.SortShuffleManager
+import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
+import org.apache.spark.util.Utils
+
 class SortShuffleSuite extends ShuffleSuite with BeforeAndAfterAll {
 
   // This test suite should run all tests in ShuffleSuite with sort-based shuffle.
 
+  private var tempDir: File = _
+
   override def beforeAll() {
     conf.set("spark.shuffle.manager", "sort")
   }
+
+  override def beforeEach(): Unit = {
+    tempDir = Utils.createTempDir()
+    conf.set("spark.local.dir", tempDir.getAbsolutePath)
+  }
+
+  override def afterEach(): Unit = {
+    try {
+      Utils.deleteRecursively(tempDir)
+    } finally {
+      super.afterEach()
+    }
+  }
+
+  test("SortShuffleManager properly cleans up files for shuffles that use the serialized path") {
+    sc = new SparkContext("local", "test", conf)
+    // Create a shuffled RDD and verify that it actually uses the new serialized map output path
+    val rdd = sc.parallelize(1 to 10, 1).map(x => (x, x))
+    val shuffledRdd = new ShuffledRDD[Int, Int, Int](rdd, new HashPartitioner(4))
+      .setSerializer(new KryoSerializer(conf))
+    val shuffleDep = shuffledRdd.dependencies.head.asInstanceOf[ShuffleDependency[_, _, _]]
+    assert(SortShuffleManager.canUseSerializedShuffle(shuffleDep))
+    ensureFilesAreCleanedUp(shuffledRdd)
+  }
+
+  test("SortShuffleManager properly cleans up files for shuffles that use the deserialized path") {
+    sc = new SparkContext("local", "test", conf)
+    // Create a shuffled RDD and verify that it actually uses the old deserialized map output path
+    val rdd = sc.parallelize(1 to 10, 1).map(x => (x, x))
+    val shuffledRdd = new ShuffledRDD[Int, Int, Int](rdd, new HashPartitioner(4))
+      .setSerializer(new JavaSerializer(conf))
+    val shuffleDep = shuffledRdd.dependencies.head.asInstanceOf[ShuffleDependency[_, _, _]]
+    assert(!SortShuffleManager.canUseSerializedShuffle(shuffleDep))
+    ensureFilesAreCleanedUp(shuffledRdd)
+  }
+
+  private def ensureFilesAreCleanedUp(shuffledRdd: ShuffledRDD[_, _, _]): Unit = {
+    def getAllFiles: Set[File] =
+      FileUtils.listFiles(tempDir, TrueFileFilter.INSTANCE, TrueFileFilter.INSTANCE).asScala.toSet
+    val filesBeforeShuffle = getAllFiles
+    // Force the shuffle to be performed
+    shuffledRdd.count()
+    // Ensure that the shuffle actually created files that will need to be cleaned up
+    val filesCreatedByShuffle = getAllFiles -- filesBeforeShuffle
+    filesCreatedByShuffle.map(_.getName) should be
+    Set("shuffle_0_0_0.data", "shuffle_0_0_0.index")
+    // Check that the cleanup actually removes the files
+    sc.env.blockManager.master.removeShuffle(0, blocking = true)
+    for (file <- filesCreatedByShuffle) {
+      assert (!file.exists(), s"Shuffle file $file was not cleaned up")
+    }
+  }
 }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 5b01ddb298c3..3816b8c4a09a 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -1062,10 +1062,10 @@ class DAGSchedulerSuite
    */
   test("don't submit stage until its dependencies map outputs are registered (SPARK-5259)") {
     val firstRDD = new MyRDD(sc, 3, Nil)
-    val firstShuffleDep = new ShuffleDependency(firstRDD, null)
+    val firstShuffleDep = new ShuffleDependency(firstRDD, new HashPartitioner(2))
     val firstShuffleId = firstShuffleDep.shuffleId
     val shuffleMapRdd = new MyRDD(sc, 3, List(firstShuffleDep))
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val reduceRdd = new MyRDD(sc, 1, List(shuffleDep))
     submit(reduceRdd, Array(0))
 
@@ -1175,7 +1175,7 @@ class DAGSchedulerSuite
    */
   test("register map outputs correctly after ExecutorLost and task Resubmitted") {
     val firstRDD = new MyRDD(sc, 3, Nil)
-    val firstShuffleDep = new ShuffleDependency(firstRDD, null)
+    val firstShuffleDep = new ShuffleDependency(firstRDD, new HashPartitioner(2))
     val reduceRdd = new MyRDD(sc, 5, List(firstShuffleDep))
     submit(reduceRdd, Array(0))
 
diff --git a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
index 341f56df2daf..b92a302806f7 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
@@ -33,7 +33,8 @@ import org.scalatest.BeforeAndAfterEach
 
 import org.apache.spark._
 import org.apache.spark.executor.{TaskMetrics, ShuffleWriteMetrics}
-import org.apache.spark.serializer.{SerializerInstance, Serializer, JavaSerializer}
+import org.apache.spark.shuffle.IndexShuffleBlockResolver
+import org.apache.spark.serializer.{JavaSerializer, SerializerInstance}
 import org.apache.spark.storage._
 import org.apache.spark.util.Utils
 
@@ -42,25 +43,31 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
   @Mock(answer = RETURNS_SMART_NULLS) private var blockManager: BlockManager = _
   @Mock(answer = RETURNS_SMART_NULLS) private var diskBlockManager: DiskBlockManager = _
   @Mock(answer = RETURNS_SMART_NULLS) private var taskContext: TaskContext = _
+  @Mock(answer = RETURNS_SMART_NULLS) private var blockResolver: IndexShuffleBlockResolver = _
+  @Mock(answer = RETURNS_SMART_NULLS) private var dependency: ShuffleDependency[Int, Int, Int] = _
 
   private var taskMetrics: TaskMetrics = _
-  private var shuffleWriteMetrics: ShuffleWriteMetrics = _
   private var tempDir: File = _
   private var outputFile: File = _
   private val conf: SparkConf = new SparkConf(loadDefaults = false)
   private val temporaryFilesCreated: mutable.Buffer[File] = new ArrayBuffer[File]()
   private val blockIdToFileMap: mutable.Map[BlockId, File] = new mutable.HashMap[BlockId, File]
-  private val shuffleBlockId: ShuffleBlockId = new ShuffleBlockId(0, 0, 0)
-  private val serializer: Serializer = new JavaSerializer(conf)
+  private var shuffleHandle: BypassMergeSortShuffleHandle[Int, Int] = _
 
   override def beforeEach(): Unit = {
     tempDir = Utils.createTempDir()
     outputFile = File.createTempFile("shuffle", null, tempDir)
-    shuffleWriteMetrics = new ShuffleWriteMetrics
     taskMetrics = new TaskMetrics
-    taskMetrics.shuffleWriteMetrics = Some(shuffleWriteMetrics)
     MockitoAnnotations.initMocks(this)
+    shuffleHandle = new BypassMergeSortShuffleHandle[Int, Int](
+      shuffleId = 0,
+      numMaps = 2,
+      dependency = dependency
+    )
+    when(dependency.partitioner).thenReturn(new HashPartitioner(7))
+    when(dependency.serializer).thenReturn(Some(new JavaSerializer(conf)))
     when(taskContext.taskMetrics()).thenReturn(taskMetrics)
+    when(blockResolver.getDataFile(0, 0)).thenReturn(outputFile)
     when(blockManager.diskBlockManager).thenReturn(diskBlockManager)
     when(blockManager.getDiskWriter(
       any[BlockId],
@@ -107,18 +114,20 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
 
   test("write empty iterator") {
     val writer = new BypassMergeSortShuffleWriter[Int, Int](
-      new SparkConf(loadDefaults = false),
       blockManager,
-      new HashPartitioner(7),
-      shuffleWriteMetrics,
-      serializer
+      blockResolver,
+      shuffleHandle,
+      0, // MapId
+      taskContext,
+      conf
     )
-    writer.insertAll(Iterator.empty)
-    val partitionLengths = writer.writePartitionedFile(shuffleBlockId, taskContext, outputFile)
-    assert(partitionLengths.sum === 0)
+    writer.write(Iterator.empty)
+    writer.stop( /* success = */ true)
+    assert(writer.getPartitionLengths.sum === 0)
     assert(outputFile.exists())
     assert(outputFile.length() === 0)
     assert(temporaryFilesCreated.isEmpty)
+    val shuffleWriteMetrics = taskContext.taskMetrics().shuffleWriteMetrics.get
     assert(shuffleWriteMetrics.shuffleBytesWritten === 0)
     assert(shuffleWriteMetrics.shuffleRecordsWritten === 0)
     assert(taskMetrics.diskBytesSpilled === 0)
@@ -129,17 +138,19 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
     def records: Iterator[(Int, Int)] =
       Iterator((1, 1), (5, 5)) ++ (0 until 100000).iterator.map(x => (2, 2))
     val writer = new BypassMergeSortShuffleWriter[Int, Int](
-      new SparkConf(loadDefaults = false),
       blockManager,
-      new HashPartitioner(7),
-      shuffleWriteMetrics,
-      serializer
+      blockResolver,
+      shuffleHandle,
+      0, // MapId
+      taskContext,
+      conf
     )
-    writer.insertAll(records)
+    writer.write(records)
+    writer.stop( /* success = */ true)
     assert(temporaryFilesCreated.nonEmpty)
-    val partitionLengths = writer.writePartitionedFile(shuffleBlockId, taskContext, outputFile)
-    assert(partitionLengths.sum === outputFile.length())
+    assert(writer.getPartitionLengths.sum === outputFile.length())
     assert(temporaryFilesCreated.count(_.exists()) === 0) // check that temporary files were deleted
+    val shuffleWriteMetrics = taskContext.taskMetrics().shuffleWriteMetrics.get
     assert(shuffleWriteMetrics.shuffleBytesWritten === outputFile.length())
     assert(shuffleWriteMetrics.shuffleRecordsWritten === records.length)
     assert(taskMetrics.diskBytesSpilled === 0)
@@ -148,14 +159,15 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
 
   test("cleanup of intermediate files after errors") {
     val writer = new BypassMergeSortShuffleWriter[Int, Int](
-      new SparkConf(loadDefaults = false),
       blockManager,
-      new HashPartitioner(7),
-      shuffleWriteMetrics,
-      serializer
+      blockResolver,
+      shuffleHandle,
+      0, // MapId
+      taskContext,
+      conf
     )
     intercept[SparkException] {
-      writer.insertAll((0 until 100000).iterator.map(i => {
+      writer.write((0 until 100000).iterator.map(i => {
         if (i == 99990) {
           throw new SparkException("Intentional failure")
         }
@@ -163,7 +175,7 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
       }))
     }
     assert(temporaryFilesCreated.nonEmpty)
-    writer.stop()
+    writer.stop( /* success = */ false)
     assert(temporaryFilesCreated.count(_.exists()) === 0)
   }
 
diff --git a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManagerSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleManagerSuite.scala
similarity index 80%
rename from core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManagerSuite.scala
rename to core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleManagerSuite.scala
index 6727934d8c7c..8744a072cb3f 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleManagerSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.shuffle.unsafe
+package org.apache.spark.shuffle.sort
 
 import org.mockito.Mockito._
 import org.mockito.invocation.InvocationOnMock
@@ -29,9 +29,9 @@ import org.apache.spark.serializer.{JavaSerializer, KryoSerializer, Serializer}
  * Tests for the fallback logic in UnsafeShuffleManager. Actual tests of shuffling data are
  * performed in other suites.
  */
-class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
+class SortShuffleManagerSuite extends SparkFunSuite with Matchers {
 
-  import UnsafeShuffleManager.canUseUnsafeShuffle
+  import SortShuffleManager.canUseSerializedShuffle
 
   private class RuntimeExceptionAnswer extends Answer[Object] {
     override def answer(invocation: InvocationOnMock): Object = {
@@ -55,10 +55,10 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
     dep
   }
 
-  test("supported shuffle dependencies") {
+  test("supported shuffle dependencies for serialized shuffle") {
     val kryo = Some(new KryoSerializer(new SparkConf()))
 
-    assert(canUseUnsafeShuffle(shuffleDep(
+    assert(canUseSerializedShuffle(shuffleDep(
       partitioner = new HashPartitioner(2),
       serializer = kryo,
       keyOrdering = None,
@@ -68,7 +68,7 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
 
     val rangePartitioner = mock(classOf[RangePartitioner[Any, Any]])
     when(rangePartitioner.numPartitions).thenReturn(2)
-    assert(canUseUnsafeShuffle(shuffleDep(
+    assert(canUseSerializedShuffle(shuffleDep(
       partitioner = rangePartitioner,
       serializer = kryo,
       keyOrdering = None,
@@ -77,7 +77,7 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
     )))
 
     // Shuffles with key orderings are supported as long as no aggregator is specified
-    assert(canUseUnsafeShuffle(shuffleDep(
+    assert(canUseSerializedShuffle(shuffleDep(
       partitioner = new HashPartitioner(2),
       serializer = kryo,
       keyOrdering = Some(mock(classOf[Ordering[Any]])),
@@ -87,12 +87,12 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
 
   }
 
-  test("unsupported shuffle dependencies") {
+  test("unsupported shuffle dependencies for serialized shuffle") {
     val kryo = Some(new KryoSerializer(new SparkConf()))
     val java = Some(new JavaSerializer(new SparkConf()))
 
     // We only support serializers that support object relocation
-    assert(!canUseUnsafeShuffle(shuffleDep(
+    assert(!canUseSerializedShuffle(shuffleDep(
       partitioner = new HashPartitioner(2),
       serializer = java,
       keyOrdering = None,
@@ -100,9 +100,11 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
       mapSideCombine = false
     )))
 
-    // We do not support shuffles with more than 16 million output partitions
-    assert(!canUseUnsafeShuffle(shuffleDep(
-      partitioner = new HashPartitioner(UnsafeShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS + 1),
+    // The serialized shuffle path do not support shuffles with more than 16 million output
+    // partitions, due to a limitation in its sorter implementation.
+    assert(!canUseSerializedShuffle(shuffleDep(
+      partitioner = new HashPartitioner(
+        SortShuffleManager.MAX_SHUFFLE_OUTPUT_PARTITIONS_FOR_SERIALIZED_MODE + 1),
       serializer = kryo,
       keyOrdering = None,
       aggregator = None,
@@ -110,14 +112,14 @@ class UnsafeShuffleManagerSuite extends SparkFunSuite with Matchers {
     )))
 
     // We do not support shuffles that perform aggregation
-    assert(!canUseUnsafeShuffle(shuffleDep(
+    assert(!canUseSerializedShuffle(shuffleDep(
       partitioner = new HashPartitioner(2),
       serializer = kryo,
       keyOrdering = None,
       aggregator = Some(mock(classOf[Aggregator[Any, Any, Any]])),
       mapSideCombine = false
     )))
-    assert(!canUseUnsafeShuffle(shuffleDep(
+    assert(!canUseSerializedShuffle(shuffleDep(
       partitioner = new HashPartitioner(2),
       serializer = kryo,
       keyOrdering = Some(mock(classOf[Ordering[Any]])),
diff --git a/core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleWriterSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleWriterSuite.scala
deleted file mode 100644
index 34b4984f12c0..000000000000
--- a/core/src/test/scala/org/apache/spark/shuffle/sort/SortShuffleWriterSuite.scala
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle.sort
-
-import org.mockito.Mockito._
-
-import org.apache.spark.{Aggregator, SparkConf, SparkFunSuite}
-
-class SortShuffleWriterSuite extends SparkFunSuite {
-
-  import SortShuffleWriter._
-
-  test("conditions for bypassing merge-sort") {
-    val conf = new SparkConf(loadDefaults = false)
-    val agg = mock(classOf[Aggregator[_, _, _]], RETURNS_SMART_NULLS)
-    val ord = implicitly[Ordering[Int]]
-
-    // Numbers of partitions that are above and below the default bypassMergeThreshold
-    val FEW_PARTITIONS = 50
-    val MANY_PARTITIONS = 10000
-
-    // Shuffles with no ordering or aggregator: should bypass unless # of partitions is high
-    assert(shouldBypassMergeSort(conf, FEW_PARTITIONS, None, None))
-    assert(!shouldBypassMergeSort(conf, MANY_PARTITIONS, None, None))
-
-    // Shuffles with an ordering or aggregator: should not bypass even if they have few partitions
-    assert(!shouldBypassMergeSort(conf, FEW_PARTITIONS, None, Some(ord)))
-    assert(!shouldBypassMergeSort(conf, FEW_PARTITIONS, Some(agg), None))
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
deleted file mode 100644
index 259020a2ddc3..000000000000
--- a/core/src/test/scala/org/apache/spark/shuffle/unsafe/UnsafeShuffleSuite.scala
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle.unsafe
-
-import java.io.File
-
-import scala.collection.JavaConverters._
-
-import org.apache.commons.io.FileUtils
-import org.apache.commons.io.filefilter.TrueFileFilter
-import org.scalatest.BeforeAndAfterAll
-
-import org.apache.spark.{HashPartitioner, ShuffleDependency, SparkContext, ShuffleSuite}
-import org.apache.spark.rdd.ShuffledRDD
-import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
-import org.apache.spark.util.Utils
-
-class UnsafeShuffleSuite extends ShuffleSuite with BeforeAndAfterAll {
-
-  // This test suite should run all tests in ShuffleSuite with unsafe-based shuffle.
-
-  override def beforeAll() {
-    conf.set("spark.shuffle.manager", "tungsten-sort")
-  }
-
-  test("UnsafeShuffleManager properly cleans up files for shuffles that use the new shuffle path") {
-    val tmpDir = Utils.createTempDir()
-    try {
-      val myConf = conf.clone()
-        .set("spark.local.dir", tmpDir.getAbsolutePath)
-      sc = new SparkContext("local", "test", myConf)
-      // Create a shuffled RDD and verify that it will actually use the new UnsafeShuffle path
-      val rdd = sc.parallelize(1 to 10, 1).map(x => (x, x))
-      val shuffledRdd = new ShuffledRDD[Int, Int, Int](rdd, new HashPartitioner(4))
-        .setSerializer(new KryoSerializer(myConf))
-      val shuffleDep = shuffledRdd.dependencies.head.asInstanceOf[ShuffleDependency[_, _, _]]
-      assert(UnsafeShuffleManager.canUseUnsafeShuffle(shuffleDep))
-      def getAllFiles: Set[File] =
-        FileUtils.listFiles(tmpDir, TrueFileFilter.INSTANCE, TrueFileFilter.INSTANCE).asScala.toSet
-      val filesBeforeShuffle = getAllFiles
-      // Force the shuffle to be performed
-      shuffledRdd.count()
-      // Ensure that the shuffle actually created files that will need to be cleaned up
-      val filesCreatedByShuffle = getAllFiles -- filesBeforeShuffle
-      filesCreatedByShuffle.map(_.getName) should be
-        Set("shuffle_0_0_0.data", "shuffle_0_0_0.index")
-      // Check that the cleanup actually removes the files
-      sc.env.blockManager.master.removeShuffle(0, blocking = true)
-      for (file <- filesCreatedByShuffle) {
-        assert (!file.exists(), s"Shuffle file $file was not cleaned up")
-      }
-    } finally {
-      Utils.deleteRecursively(tmpDir)
-    }
-  }
-
-  test("UnsafeShuffleManager properly cleans up files for shuffles that use the old shuffle path") {
-    val tmpDir = Utils.createTempDir()
-    try {
-      val myConf = conf.clone()
-        .set("spark.local.dir", tmpDir.getAbsolutePath)
-      sc = new SparkContext("local", "test", myConf)
-      // Create a shuffled RDD and verify that it will actually use the old SortShuffle path
-      val rdd = sc.parallelize(1 to 10, 1).map(x => (x, x))
-      val shuffledRdd = new ShuffledRDD[Int, Int, Int](rdd, new HashPartitioner(4))
-        .setSerializer(new JavaSerializer(myConf))
-      val shuffleDep = shuffledRdd.dependencies.head.asInstanceOf[ShuffleDependency[_, _, _]]
-      assert(!UnsafeShuffleManager.canUseUnsafeShuffle(shuffleDep))
-      def getAllFiles: Set[File] =
-        FileUtils.listFiles(tmpDir, TrueFileFilter.INSTANCE, TrueFileFilter.INSTANCE).asScala.toSet
-      val filesBeforeShuffle = getAllFiles
-      // Force the shuffle to be performed
-      shuffledRdd.count()
-      // Ensure that the shuffle actually created files that will need to be cleaned up
-      val filesCreatedByShuffle = getAllFiles -- filesBeforeShuffle
-      filesCreatedByShuffle.map(_.getName) should be
-        Set("shuffle_0_0_0.data", "shuffle_0_0_0.index")
-      // Check that the cleanup actually removes the files
-      sc.env.blockManager.master.removeShuffle(0, blocking = true)
-      for (file <- filesCreatedByShuffle) {
-        assert (!file.exists(), s"Shuffle file $file was not cleaned up")
-      }
-    } finally {
-      Utils.deleteRecursively(tmpDir)
-    }
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ChainedBufferSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ChainedBufferSuite.scala
deleted file mode 100644
index 05306f408847..000000000000
--- a/core/src/test/scala/org/apache/spark/util/collection/ChainedBufferSuite.scala
+++ /dev/null
@@ -1,144 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.util.collection
-
-import java.nio.ByteBuffer
-
-import org.scalatest.Matchers._
-
-import org.apache.spark.SparkFunSuite
-
-class ChainedBufferSuite extends SparkFunSuite {
-  test("write and read at start") {
-    // write from start of source array
-    val buffer = new ChainedBuffer(8)
-    buffer.capacity should be (0)
-    verifyWriteAndRead(buffer, 0, 0, 0, 4)
-    buffer.capacity should be (8)
-
-    // write from middle of source array
-    verifyWriteAndRead(buffer, 0, 5, 0, 4)
-    buffer.capacity should be (8)
-
-    // read to middle of target array
-    verifyWriteAndRead(buffer, 0, 0, 5, 4)
-    buffer.capacity should be (8)
-
-    // write up to border
-    verifyWriteAndRead(buffer, 0, 0, 0, 8)
-    buffer.capacity should be (8)
-
-    // expand into second buffer
-    verifyWriteAndRead(buffer, 0, 0, 0, 12)
-    buffer.capacity should be (16)
-
-    // expand into multiple buffers
-    verifyWriteAndRead(buffer, 0, 0, 0, 28)
-    buffer.capacity should be (32)
-  }
-
-  test("write and read at middle") {
-    val buffer = new ChainedBuffer(8)
-
-    // fill to a middle point
-    verifyWriteAndRead(buffer, 0, 0, 0, 3)
-
-    // write from start of source array
-    verifyWriteAndRead(buffer, 3, 0, 0, 4)
-    buffer.capacity should be (8)
-
-    // write from middle of source array
-    verifyWriteAndRead(buffer, 3, 5, 0, 4)
-    buffer.capacity should be (8)
-
-    // read to middle of target array
-    verifyWriteAndRead(buffer, 3, 0, 5, 4)
-    buffer.capacity should be (8)
-
-    // write up to border
-    verifyWriteAndRead(buffer, 3, 0, 0, 5)
-    buffer.capacity should be (8)
-
-    // expand into second buffer
-    verifyWriteAndRead(buffer, 3, 0, 0, 12)
-    buffer.capacity should be (16)
-
-    // expand into multiple buffers
-    verifyWriteAndRead(buffer, 3, 0, 0, 28)
-    buffer.capacity should be (32)
-  }
-
-  test("write and read at later buffer") {
-    val buffer = new ChainedBuffer(8)
-
-    // fill to a middle point
-    verifyWriteAndRead(buffer, 0, 0, 0, 11)
-
-    // write from start of source array
-    verifyWriteAndRead(buffer, 11, 0, 0, 4)
-    buffer.capacity should be (16)
-
-    // write from middle of source array
-    verifyWriteAndRead(buffer, 11, 5, 0, 4)
-    buffer.capacity should be (16)
-
-    // read to middle of target array
-    verifyWriteAndRead(buffer, 11, 0, 5, 4)
-    buffer.capacity should be (16)
-
-    // write up to border
-    verifyWriteAndRead(buffer, 11, 0, 0, 5)
-    buffer.capacity should be (16)
-
-    // expand into second buffer
-    verifyWriteAndRead(buffer, 11, 0, 0, 12)
-    buffer.capacity should be (24)
-
-    // expand into multiple buffers
-    verifyWriteAndRead(buffer, 11, 0, 0, 28)
-    buffer.capacity should be (40)
-  }
-
-
-  // Used to make sure we're writing different bytes each time
-  var rangeStart = 0
-
-  /**
-   * @param buffer The buffer to write to and read from.
-   * @param offsetInBuffer The offset to write to in the buffer.
-   * @param offsetInSource The offset in the array that the bytes are written from.
-   * @param offsetInTarget The offset in the array to read the bytes into.
-   * @param length The number of bytes to read and write
-   */
-  def verifyWriteAndRead(
-      buffer: ChainedBuffer,
-      offsetInBuffer: Int,
-      offsetInSource: Int,
-      offsetInTarget: Int,
-      length: Int): Unit = {
-    val source = new Array[Byte](offsetInSource + length)
-    (rangeStart until rangeStart + length).map(_.toByte).copyToArray(source, offsetInSource)
-    buffer.write(offsetInBuffer, source, offsetInSource, length)
-    val target = new Array[Byte](offsetInTarget + length)
-    buffer.read(offsetInBuffer, target, offsetInTarget, length)
-    ByteBuffer.wrap(source, offsetInSource, length) should be
-      (ByteBuffer.wrap(target, offsetInTarget, length))
-
-    rangeStart += 100
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/util/collection/PartitionedSerializedPairBufferSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/PartitionedSerializedPairBufferSuite.scala
deleted file mode 100644
index 3b67f6206495..000000000000
--- a/core/src/test/scala/org/apache/spark/util/collection/PartitionedSerializedPairBufferSuite.scala
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.util.collection
-
-import java.io.{ByteArrayInputStream, ByteArrayOutputStream}
-
-import com.google.common.io.ByteStreams
-
-import org.mockito.Matchers.any
-import org.mockito.Mockito._
-import org.mockito.Mockito.RETURNS_SMART_NULLS
-import org.mockito.invocation.InvocationOnMock
-import org.mockito.stubbing.Answer
-import org.scalatest.Matchers._
-
-import org.apache.spark.{SparkConf, SparkFunSuite}
-import org.apache.spark.serializer.KryoSerializer
-import org.apache.spark.storage.DiskBlockObjectWriter
-
-class PartitionedSerializedPairBufferSuite extends SparkFunSuite {
-  test("OrderedInputStream single record") {
-    val serializerInstance = new KryoSerializer(new SparkConf()).newInstance
-
-    val buffer = new PartitionedSerializedPairBuffer[Int, SomeStruct](4, 32, serializerInstance)
-    val struct = SomeStruct("something", 5)
-    buffer.insert(4, 10, struct)
-
-    val bytes = ByteStreams.toByteArray(buffer.orderedInputStream)
-
-    val baos = new ByteArrayOutputStream()
-    val stream = serializerInstance.serializeStream(baos)
-    stream.writeObject(10)
-    stream.writeObject(struct)
-    stream.close()
-
-    baos.toByteArray should be (bytes)
-  }
-
-  test("insert single record") {
-    val serializerInstance = new KryoSerializer(new SparkConf()).newInstance
-    val buffer = new PartitionedSerializedPairBuffer[Int, SomeStruct](4, 32, serializerInstance)
-    val struct = SomeStruct("something", 5)
-    buffer.insert(4, 10, struct)
-    val elements = buffer.partitionedDestructiveSortedIterator(None).toArray
-    elements.size should be (1)
-    elements.head should be (((4, 10), struct))
-  }
-
-  test("insert multiple records") {
-    val serializerInstance = new KryoSerializer(new SparkConf()).newInstance
-    val buffer = new PartitionedSerializedPairBuffer[Int, SomeStruct](4, 32, serializerInstance)
-    val struct1 = SomeStruct("something1", 8)
-    buffer.insert(6, 1, struct1)
-    val struct2 = SomeStruct("something2", 9)
-    buffer.insert(4, 2, struct2)
-    val struct3 = SomeStruct("something3", 10)
-    buffer.insert(5, 3, struct3)
-
-    val elements = buffer.partitionedDestructiveSortedIterator(None).toArray
-    elements.size should be (3)
-    elements(0) should be (((4, 2), struct2))
-    elements(1) should be (((5, 3), struct3))
-    elements(2) should be (((6, 1), struct1))
-  }
-
-  test("write single record") {
-    val serializerInstance = new KryoSerializer(new SparkConf()).newInstance
-    val buffer = new PartitionedSerializedPairBuffer[Int, SomeStruct](4, 32, serializerInstance)
-    val struct = SomeStruct("something", 5)
-    buffer.insert(4, 10, struct)
-    val it = buffer.destructiveSortedWritablePartitionedIterator(None)
-    val (writer, baos) = createMockWriter()
-    assert(it.hasNext)
-    it.nextPartition should be (4)
-    it.writeNext(writer)
-    assert(!it.hasNext)
-
-    val stream = serializerInstance.deserializeStream(new ByteArrayInputStream(baos.toByteArray))
-    stream.readObject[AnyRef]() should be (10)
-    stream.readObject[AnyRef]() should be (struct)
-  }
-
-  test("write multiple records") {
-    val serializerInstance = new KryoSerializer(new SparkConf()).newInstance
-    val buffer = new PartitionedSerializedPairBuffer[Int, SomeStruct](4, 32, serializerInstance)
-    val struct1 = SomeStruct("something1", 8)
-    buffer.insert(6, 1, struct1)
-    val struct2 = SomeStruct("something2", 9)
-    buffer.insert(4, 2, struct2)
-    val struct3 = SomeStruct("something3", 10)
-    buffer.insert(5, 3, struct3)
-
-    val it = buffer.destructiveSortedWritablePartitionedIterator(None)
-    val (writer, baos) = createMockWriter()
-    assert(it.hasNext)
-    it.nextPartition should be (4)
-    it.writeNext(writer)
-    assert(it.hasNext)
-    it.nextPartition should be (5)
-    it.writeNext(writer)
-    assert(it.hasNext)
-    it.nextPartition should be (6)
-    it.writeNext(writer)
-    assert(!it.hasNext)
-
-    val stream = serializerInstance.deserializeStream(new ByteArrayInputStream(baos.toByteArray))
-    val iter = stream.asIterator
-    iter.next() should be (2)
-    iter.next() should be (struct2)
-    iter.next() should be (3)
-    iter.next() should be (struct3)
-    iter.next() should be (1)
-    iter.next() should be (struct1)
-    assert(!iter.hasNext)
-  }
-
-  def createMockWriter(): (DiskBlockObjectWriter, ByteArrayOutputStream) = {
-    val writer = mock(classOf[DiskBlockObjectWriter], RETURNS_SMART_NULLS)
-    val baos = new ByteArrayOutputStream()
-    when(writer.write(any(), any(), any())).thenAnswer(new Answer[Unit] {
-      override def answer(invocationOnMock: InvocationOnMock): Unit = {
-        val args = invocationOnMock.getArguments
-        val bytes = args(0).asInstanceOf[Array[Byte]]
-        val offset = args(1).asInstanceOf[Int]
-        val length = args(2).asInstanceOf[Int]
-        baos.write(bytes, offset, length)
-      }
-    })
-    (writer, baos)
-  }
-}
-
-case class SomeStruct(str: String, num: Int)
diff --git a/docs/configuration.md b/docs/configuration.md
index 46d92ceb762d..be9c36bdfe3d 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -437,12 +437,9 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.shuffle.manager</code></td>
   <td>sort</td>
   <td>
-    Implementation to use for shuffling data. There are three implementations available:
-    <code>sort</code>, <code>hash</code> and the new (1.5+) <code>tungsten-sort</code>.
+    Implementation to use for shuffling data. There are two implementations available:
+    <code>sort</code> and <code>hash</code>.
     Sort-based shuffle is more memory-efficient and is the default option starting in 1.2.
-    Tungsten-sort is similar to the sort based shuffle, with a direct binary cache-friendly
-    implementation with a fall back to regular sort based shuffle if its requirements are not
-    met.
   </td>
 </tr>
 <tr>
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 0872d3f3e709..b5e661d3ecfa 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -37,6 +37,7 @@ object MimaExcludes {
       Seq(
         MimaBuild.excludeSparkPackage("deploy"),
         MimaBuild.excludeSparkPackage("network"),
+        MimaBuild.excludeSparkPackage("unsafe"),
         // These are needed if checking against the sbt build, since they are part of
         // the maven-generated artifacts in 1.3.
         excludePackage("org.spark-project.jetty"),
@@ -44,7 +45,11 @@ object MimaExcludes {
         // SQL execution is considered private.
         excludePackage("org.apache.spark.sql.execution"),
         // SQL columnar is considered private.
-        excludePackage("org.apache.spark.sql.columnar")
+        excludePackage("org.apache.spark.sql.columnar"),
+        // The shuffle package is considered private.
+        excludePackage("org.apache.spark.shuffle"),
+        // The collections utlities are considered pricate.
+        excludePackage("org.apache.spark.util.collection")
       ) ++
       MimaBuild.excludeSparkClass("streaming.flume.FlumeTestUtils") ++
       MimaBuild.excludeSparkClass("streaming.flume.PollingFlumeTestUtils") ++
@@ -750,4 +755,4 @@ object MimaExcludes {
       MimaBuild.excludeSparkClass("mllib.regression.LinearRegressionWithSGD")
     case _ => Seq()
   }
-}
\ No newline at end of file
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 1d3379a5e2d9..7f60c8f5eaa9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -24,7 +24,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.serializer.Serializer
 import org.apache.spark.shuffle.hash.HashShuffleManager
 import org.apache.spark.shuffle.sort.SortShuffleManager
-import org.apache.spark.shuffle.unsafe.UnsafeShuffleManager
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors.attachTree
@@ -87,10 +86,8 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
     // fewer partitions (like RangePartitioner, for example).
     val conf = child.sqlContext.sparkContext.conf
     val shuffleManager = SparkEnv.get.shuffleManager
-    val sortBasedShuffleOn = shuffleManager.isInstanceOf[SortShuffleManager] ||
-      shuffleManager.isInstanceOf[UnsafeShuffleManager]
+    val sortBasedShuffleOn = shuffleManager.isInstanceOf[SortShuffleManager]
     val bypassMergeThreshold = conf.getInt("spark.shuffle.sort.bypassMergeThreshold", 200)
-    val serializeMapOutputs = conf.getBoolean("spark.shuffle.sort.serializeMapOutputs", true)
     if (sortBasedShuffleOn) {
       val bypassIsSupported = SparkEnv.get.shuffleManager.isInstanceOf[SortShuffleManager]
       if (bypassIsSupported && partitioner.numPartitions <= bypassMergeThreshold) {
@@ -99,22 +96,18 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
         // doesn't buffer deserialized records.
         // Note that we'll have to remove this case if we fix SPARK-6026 and remove this bypass.
         false
-      } else if (serializeMapOutputs && serializer.supportsRelocationOfSerializedObjects) {
-        // SPARK-4550 extended sort-based shuffle to serialize individual records prior to sorting
-        // them. This optimization is guarded by a feature-flag and is only applied in cases where
-        // shuffle dependency does not specify an aggregator or ordering and the record serializer
-        // has certain properties. If this optimization is enabled, we can safely avoid the copy.
+      } else if (serializer.supportsRelocationOfSerializedObjects) {
+        // SPARK-4550 and  SPARK-7081 extended sort-based shuffle to serialize individual records
+        // prior to sorting them. This optimization is only applied in cases where shuffle
+        // dependency does not specify an aggregator or ordering and the record serializer has
+        // certain properties. If this optimization is enabled, we can safely avoid the copy.
         //
         // Exchange never configures its ShuffledRDDs with aggregators or key orderings, so we only
         // need to check whether the optimization is enabled and supported by our serializer.
-        //
-        // This optimization also applies to UnsafeShuffleManager (added in SPARK-7081).
         false
       } else {
-        // Spark's SortShuffleManager uses `ExternalSorter` to buffer records in memory. This code
-        // path is used both when SortShuffleManager is used and when UnsafeShuffleManager falls
-        // back to SortShuffleManager to perform a shuffle that the new fast path can't handle. In
-        // both cases, we must copy.
+        // Spark's SortShuffleManager uses `ExternalSorter` to buffer records in memory, so we must
+        // copy.
         true
       }
     } else if (shuffleManager.isInstanceOf[HashShuffleManager]) {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
index 75d1fced594c..1680d7e0a85c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
@@ -101,7 +101,7 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
     val oldEnv = SparkEnv.get // save the old SparkEnv, as it will be overwritten
     Utils.tryWithSafeFinally {
       val conf = new SparkConf()
-        .set("spark.shuffle.spill.initialMemoryThreshold", "1024")
+        .set("spark.shuffle.spill.initialMemoryThreshold", "1")
         .set("spark.shuffle.sort.bypassMergeThreshold", "0")
         .set("spark.testing.memory", "80000")
 
@@ -109,7 +109,7 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
       outputFile = File.createTempFile("test-unsafe-row-serializer-spill", "")
       // prepare data
       val converter = unsafeRowConverter(Array(IntegerType))
-      val data = (1 to 1000).iterator.map { i =>
+      val data = (1 to 10000).iterator.map { i =>
         (i, converter(Row(i)))
       }
       val sorter = new ExternalSorter[Int, UnsafeRow, UnsafeRow](
@@ -141,9 +141,8 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
     }
   }
 
-  test("SPARK-10403: unsafe row serializer with UnsafeShuffleManager") {
-    val conf = new SparkConf()
-      .set("spark.shuffle.manager", "tungsten-sort")
+  test("SPARK-10403: unsafe row serializer with SortShuffleManager") {
+    val conf = new SparkConf().set("spark.shuffle.manager", "sort")
     sc = new SparkContext("local", "test", conf)
     val row = Row("Hello", 123)
     val unsafeRow = toUnsafeRow(row, Array(StringType, IntegerType))

From 42d225f449c633be7465493c57b9881303ee14ba Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 22 Oct 2015 10:53:59 -0700
Subject: [PATCH 329/896] [SPARK-11216][SQL][FOLLOW-UP] add encoder/decoder for
 external row

address comments in https://github.com/apache/spark/pull/9184

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9212 from cloud-fan/encoder.
---
 .../spark/sql/catalyst/encoders/ClassEncoder.scala | 14 +++-----------
 .../spark/sql/catalyst/encoders/RowEncoder.scala   |  9 ++++++---
 .../spark/sql/catalyst/expressions/objects.scala   |  8 +++++++-
 .../sql/catalyst/encoders/RowEncoderSuite.scala    |  2 +-
 4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
index f3a106387177..54096f18cbea 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
@@ -48,20 +48,12 @@ case class ClassEncoder[T](
   private val dataType = ObjectType(clsTag.runtimeClass)
 
   override def toRow(t: T): InternalRow = {
-    if (t == null) {
-      null
-    } else {
-      inputRow(0) = t
-      extractProjection(inputRow)
-    }
+    inputRow(0) = t
+    extractProjection(inputRow)
   }
 
   override def fromRow(row: InternalRow): T = {
-    if (row eq null) {
-      null.asInstanceOf[T]
-    } else {
-      constructProjection(row).get(0, dataType).asInstanceOf[T]
-    }
+    constructProjection(row).get(0, dataType).asInstanceOf[T]
   }
 
   override def bind(schema: Seq[Attribute]): ClassEncoder[T] = {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index 3e74aabd078d..5142856afdca 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -26,8 +26,11 @@ import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
+/**
+ * A factory for constructing encoders that convert external row to/from the Spark SQL
+ * internal binary representation.
+ */
 object RowEncoder {
-
   def apply(schema: StructType): ClassEncoder[Row] = {
     val cls = classOf[Row]
     val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
@@ -136,7 +139,7 @@ object RowEncoder {
         constructorFor(BoundReference(i, f.dataType, f.nullable), f.dataType)
       )
     }
-    CreateRow(fields)
+    CreateExternalRow(fields)
   }
 
   private def constructorFor(input: Expression, dataType: DataType): Expression = dataType match {
@@ -195,7 +198,7 @@ object RowEncoder {
           Literal.create(null, externalDataTypeFor(f.dataType)),
           constructorFor(getField(input, i, f.dataType), f.dataType))
       }
-      CreateRow(convertedFields)
+      CreateExternalRow(convertedFields)
   }
 
   private def getField(
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 8fc00ad1bcb0..b42d6c5c1e14 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -456,7 +456,13 @@ case class MapObjects(
   }
 }
 
-case class CreateRow(children: Seq[Expression]) extends Expression {
+/**
+ * Constructs a new external row, using the result of evaluating the specified expressions
+ * as content.
+ *
+ * @param children A list of expression to use as content of the external row.
+ */
+case class CreateExternalRow(children: Seq[Expression]) extends Expression {
   override def dataType: DataType = ObjectType(classOf[Row])
 
   override def nullable: Boolean = false
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
index 6041b62b74bd..e8301e8e06b5 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
@@ -73,7 +73,7 @@ class RowEncoderSuite extends SparkFunSuite {
   private def encodeDecodeTest(schema: StructType): Unit = {
     test(s"encode/decode: ${schema.simpleString}") {
       val encoder = RowEncoder(schema)
-      val inputGenerator = RandomDataGenerator.forType(schema).get
+      val inputGenerator = RandomDataGenerator.forType(schema, nullable = false).get
 
       var input: Row = null
       try {

From 7bb6d31cff279776f90744407291682774cfe1c2 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Thu, 22 Oct 2015 11:31:47 -0700
Subject: [PATCH 330/896] [SPARK-11232][CORE] Use 'offer' instead of 'put' to
 make sure calling send won't be interrupted

The current `NettyRpcEndpointRef.send` can be interrupted because it uses `LinkedBlockingQueue.put`, which may hang the application.

Image the following execution order:

  | thread 1: TaskRunner.kill | thread 2: TaskRunner.run
------------- | ------------- | -------------
1 | killed = true |
2 |  | if (killed) {
3 |  | throw new TaskKilledException
4 |  | case _: TaskKilledException  _: InterruptedException if task.killed =>
5 | task.kill(interruptThread): interruptThread is true |
6 | | execBackend.statusUpdate(taskId, TaskState.KILLED, ser.serialize(TaskKilled))
7 | | localEndpoint.send(StatusUpdate(taskId, state, serializedData)): in LocalBackend

Then `localEndpoint.send(StatusUpdate(taskId, state, serializedData))` will throw `InterruptedException`. This will prevent the executor from updating the task status and hang the application.

An failure caused by the above issue here: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/44062/consoleFull

Since `receivers` is an unbounded `LinkedBlockingQueue`, we can just use `LinkedBlockingQueue.offer` to resolve this issue.

Author: zsxwing <zsxwing@gmail.com>

Closes #9198 from zsxwing/dont-interrupt-send.
---
 .../scala/org/apache/spark/rpc/netty/Dispatcher.scala  | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
index f1a8273f157e..7bf44a6565b6 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -66,7 +66,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
       }
       val data = endpoints.get(name)
       endpointRefs.put(data.endpoint, data.ref)
-      receivers.put(data)  // for the OnStart message
+      receivers.offer(data)  // for the OnStart message
     }
     endpointRef
   }
@@ -80,7 +80,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     val data = endpoints.remove(name)
     if (data != null) {
       data.inbox.stop()
-      receivers.put(data)  // for the OnStop message
+      receivers.offer(data)  // for the OnStop message
     }
     // Don't clean `endpointRefs` here because it's possible that some messages are being processed
     // now and they can use `getRpcEndpointRef`. So `endpointRefs` will be cleaned in Inbox via
@@ -163,7 +163,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
         true
       } else {
         data.inbox.post(createMessageFn(data.ref))
-        receivers.put(data)
+        receivers.offer(data)
         false
       }
     }
@@ -183,7 +183,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
     // Stop all endpoints. This will queue all endpoints for processing by the message loops.
     endpoints.keySet().asScala.foreach(unregisterRpcEndpoint)
     // Enqueue a message that tells the message loops to stop.
-    receivers.put(PoisonPill)
+    receivers.offer(PoisonPill)
     threadpool.shutdown()
   }
 
@@ -218,7 +218,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
             val data = receivers.take()
             if (data == PoisonPill) {
               // Put PoisonPill back so that other MessageLoops can see it.
-              receivers.put(PoisonPill)
+              receivers.offer(PoisonPill)
               return
             }
             data.inbox.process(Dispatcher.this)

From 3535b91ddc9fd05b613a121e09263b0f378bd5fa Mon Sep 17 00:00:00 2001
From: Kay Ousterhout <kayousterhout@gmail.com>
Date: Thu, 22 Oct 2015 11:39:06 -0700
Subject: [PATCH 331/896] [SPARK-11163] Remove unnecessary addPendingTask
 calls.

This commit removes unnecessary calls to addPendingTask in
TaskSetManager.executorLost. These calls are unnecessary: for
tasks that are still pending and haven't been launched, they're
still in all of the correct pending lists, so calling addPendingTask
has no effect. For tasks that are currently running (which may still be
in the pending lists, depending on how they were scheduled), we call
addPendingTask in handleFailedTask, so the calls at the beginning
of executorLost are redundant.

I think these calls are left over from when we re-computed the locality
levels in addPendingTask; now that we call recomputeLocality separately,
I don't think these are necessary.

Now that those calls are removed, the readding parameter in addPendingTask
is no longer necessary, so this commit also removes that parameter.

markhamstra can you take a look at this?

cc vanzin

Author: Kay Ousterhout <kayousterhout@gmail.com>

Closes #9154 from kayousterhout/SPARK-11163.
---
 .../spark/scheduler/TaskSetManager.scala      | 27 ++++---------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
index c02597c4365c..987800d3d1f1 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
@@ -177,14 +177,11 @@ private[spark] class TaskSetManager(
 
   var emittedTaskSizeWarning = false
 
-  /**
-   * Add a task to all the pending-task lists that it should be on. If readding is set, we are
-   * re-adding the task so only include it in each list if it's not already there.
-   */
-  private def addPendingTask(index: Int, readding: Boolean = false) {
-    // Utility method that adds `index` to a list only if readding=false or it's not already there
+  /** Add a task to all the pending-task lists that it should be on. */
+  private def addPendingTask(index: Int) {
+    // Utility method that adds `index` to a list only if it's not already there
     def addTo(list: ArrayBuffer[Int]) {
-      if (!readding || !list.contains(index)) {
+      if (!list.contains(index)) {
         list += index
       }
     }
@@ -219,9 +216,7 @@ private[spark] class TaskSetManager(
       addTo(pendingTasksWithNoPrefs)
     }
 
-    if (!readding) {
-      allPendingTasks += index  // No point scanning this whole list to find the old task there
-    }
+    allPendingTasks += index  // No point scanning this whole list to find the old task there
   }
 
   /**
@@ -783,18 +778,6 @@ private[spark] class TaskSetManager(
 
   /** Called by TaskScheduler when an executor is lost so we can re-enqueue our tasks */
   override def executorLost(execId: String, host: String, reason: ExecutorLossReason) {
-    logInfo("Re-queueing tasks for " + execId + " from TaskSet " + taskSet.id)
-
-    // Re-enqueue pending tasks for this host based on the status of the cluster. Note
-    // that it's okay if we add a task to the same queue twice (if it had multiple preferred
-    // locations), because dequeueTaskFromList will skip already-running tasks.
-    for (index <- getPendingTasksForExecutor(execId)) {
-      addPendingTask(index, readding = true)
-    }
-    for (index <- getPendingTasksForHost(host)) {
-      addPendingTask(index, readding = true)
-    }
-
     // Re-enqueue any tasks that ran on the failed executor if this is a shuffle map stage,
     // and we are not using an external shuffle server which could serve the shuffle outputs.
     // The reason is the next stage wouldn't be able to fetch the data from this dead executor

From d4950e6be48954125eeb1be550c102636521bde3 Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Thu, 22 Oct 2015 13:11:37 -0700
Subject: [PATCH 332/896] [SPARK-9735][SQL] Respect the user specified schema
 than the infer partition schema for HadoopFsRelation

To enable the unit test of `hadoopFsRelationSuite.Partition column type casting`. It previously threw exception like below, as we treat the auto infer partition schema with higher priority than the user specified one.

```
java.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.spark.unsafe.types.UTF8String
	at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.getUTF8String(rows.scala:45)
	at org.apache.spark.sql.catalyst.expressions.GenericInternalRow.getUTF8String(rows.scala:220)
	at org.apache.spark.sql.catalyst.expressions.JoinedRow.getUTF8String(JoinedRow.scala:102)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(generated.java:62)
	at org.apache.spark.sql.execution.datasources.DataSourceStrategy$$anonfun$17$$anonfun$apply$9.apply(DataSourceStrategy.scala:212)
	at org.apache.spark.sql.execution.datasources.DataSourceStrategy$$anonfun$17$$anonfun$apply$9.apply(DataSourceStrategy.scala:212)
	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
	at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
	at scala.collection.AbstractIterator.to(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
	at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
	at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:903)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:903)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1846)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1846)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
	at org.apache.spark.scheduler.Task.run(Task.scala:88)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
07:44:01.344 ERROR org.apache.spark.executor.Executor: Exception in task 14.0 in stage 3.0 (TID 206)
java.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.spark.unsafe.types.UTF8String
	at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow$class.getUTF8String(rows.scala:45)
	at org.apache.spark.sql.catalyst.expressions.GenericInternalRow.getUTF8String(rows.scala:220)
	at org.apache.spark.sql.catalyst.expressions.JoinedRow.getUTF8String(JoinedRow.scala:102)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(generated.java:62)
	at org.apache.spark.sql.execution.datasources.DataSourceStrategy$$anonfun$17$$anonfun$apply$9.apply(DataSourceStrategy.scala:212)
	at org.apache.spark.sql.execution.datasources.DataSourceStrategy$$anonfun$17$$anonfun$apply$9.apply(DataSourceStrategy.scala:212)
	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
	at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
	at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
	at scala.collection.AbstractIterator.to(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
	at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
	at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:903)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:903)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1846)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1846)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
	at org.apache.spark.scheduler.Task.run(Task.scala:88)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
```

Author: Cheng Hao <hao.cheng@intel.com>

Closes #8026 from chenghao-intel/partition_discovery.
---
 .../apache/spark/sql/sources/interfaces.scala | 29 +++++++++++--
 .../sql/sources/hadoopFsRelationSuites.scala  | 42 +++++++++++++------
 2 files changed, 55 insertions(+), 16 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 7b030b7d73bd..84eef0f8a672 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -33,7 +33,7 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateMutableProjection
 import org.apache.spark.sql.execution.{FileRelation, RDDConversions}
 import org.apache.spark.sql.execution.datasources.{PartitioningUtils, PartitionSpec, Partition}
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.types.{StringType, StructType}
 import org.apache.spark.sql._
 import org.apache.spark.util.SerializableConfiguration
 
@@ -544,11 +544,32 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
   }
 
   private def discoverPartitions(): PartitionSpec = {
-    val typeInference = sqlContext.conf.partitionColumnTypeInferenceEnabled()
     // We use leaf dirs containing data files to discover the schema.
     val leafDirs = fileStatusCache.leafDirToChildrenFiles.keys.toSeq
-    PartitioningUtils.parsePartitions(leafDirs, PartitioningUtils.DEFAULT_PARTITION_NAME,
-      typeInference)
+    userDefinedPartitionColumns match {
+      case Some(userProvidedSchema) if userProvidedSchema.nonEmpty =>
+        val spec = PartitioningUtils.parsePartitions(
+          leafDirs, PartitioningUtils.DEFAULT_PARTITION_NAME, typeInference = false)
+
+        // Without auto inference, all of value in the `row` should be null or in StringType,
+        // we need to cast into the data type that user specified.
+        def castPartitionValuesToUserSchema(row: InternalRow) = {
+          InternalRow((0 until row.numFields).map { i =>
+            Cast(
+              Literal.create(row.getString(i), StringType),
+              userProvidedSchema.fields(i).dataType).eval()
+          }: _*)
+        }
+
+        PartitionSpec(userProvidedSchema, spec.partitions.map { part =>
+          part.copy(values = castPartitionValuesToUserSchema(part.values))
+        })
+
+      case _ =>
+        // user did not provide a partitioning schema
+        PartitioningUtils.parsePartitions(leafDirs, PartitioningUtils.DEFAULT_PARTITION_NAME,
+          typeInference = sqlContext.conf.partitionColumnTypeInferenceEnabled())
+    }
   }
 
   /**
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
index 42b9b3d6340d..e3605bb3f6bf 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
@@ -510,21 +510,39 @@ abstract class HadoopFsRelationTest extends QueryTest with SQLTestUtils with Tes
     }
   }
 
-  // HadoopFsRelation.discoverPartitions() called by refresh(), which will ignore
-  // the given partition data type.
-  ignore("Partition column type casting") {
+  test("SPARK-9735 Partition column type casting") {
     withTempPath { file =>
-      val input = partitionedTestDF.select('a, 'b, 'p1.cast(StringType).as('ps), 'p2)
-
-      input
-        .write
-        .format(dataSourceName)
-        .mode(SaveMode.Overwrite)
-        .partitionBy("ps", "p2")
-        .saveAsTable("t")
+      val df = (for {
+        i <- 1 to 3
+        p2 <- Seq("foo", "bar")
+      } yield (i, s"val_$i", 1.0d, p2, 123, 123.123f)).toDF("a", "b", "p1", "p2", "p3", "f")
+
+      val input = df.select(
+        'a,
+        'b,
+        'p1.cast(StringType).as('ps1),
+        'p2,
+        'p3.cast(FloatType).as('pf1),
+        'f)
 
       withTempTable("t") {
-        checkAnswer(sqlContext.table("t"), input.collect())
+        input
+          .write
+          .format(dataSourceName)
+          .mode(SaveMode.Overwrite)
+          .partitionBy("ps1", "p2", "pf1", "f")
+          .saveAsTable("t")
+
+        input
+          .write
+          .format(dataSourceName)
+          .mode(SaveMode.Append)
+          .partitionBy("ps1", "p2", "pf1", "f")
+          .saveAsTable("t")
+
+        val realData = input.collect()
+
+        checkAnswer(sqlContext.table("t"), realData ++ realData)
       }
     }
   }

From 188ea348fdcf877d86f3c433cd15f6468fe3b42a Mon Sep 17 00:00:00 2001
From: guoxi <guoxi@us.ibm.com>
Date: Thu, 22 Oct 2015 13:56:18 -0700
Subject: [PATCH 333/896] [SPARK-11242][SQL] In conf/spark-env.sh.template
 SPARK_DRIVER_MEMORY is documented incorrectly

Minor fix on the comment

Author: guoxi <guoxi@us.ibm.com>

Closes #9201 from xguo27/SPARK-11242.
---
 conf/spark-env.sh.template | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/conf/spark-env.sh.template b/conf/spark-env.sh.template
index 990ded420be7..771251f90ee3 100755
--- a/conf/spark-env.sh.template
+++ b/conf/spark-env.sh.template
@@ -36,10 +36,10 @@
 
 # Options read in YARN client mode
 # - HADOOP_CONF_DIR, to point Spark towards Hadoop configuration files
-# - SPARK_EXECUTOR_INSTANCES, Number of workers to start (Default: 2)
-# - SPARK_EXECUTOR_CORES, Number of cores for the workers (Default: 1).
-# - SPARK_EXECUTOR_MEMORY, Memory per Worker (e.g. 1000M, 2G) (Default: 1G)
-# - SPARK_DRIVER_MEMORY, Memory for Master (e.g. 1000M, 2G) (Default: 1G)
+# - SPARK_EXECUTOR_INSTANCES, Number of executors to start (Default: 2)
+# - SPARK_EXECUTOR_CORES, Number of cores for the executors (Default: 1).
+# - SPARK_EXECUTOR_MEMORY, Memory per Executor (e.g. 1000M, 2G) (Default: 1G)
+# - SPARK_DRIVER_MEMORY, Memory for Driver (e.g. 1000M, 2G) (Default: 1G)
 # - SPARK_YARN_APP_NAME, The name of your application (Default: Spark)
 # - SPARK_YARN_QUEUE, The hadoop queue to use for allocation requests (Default: ‘default’)
 # - SPARK_YARN_DIST_FILES, Comma separated list of files to be distributed with the job.

From 53e83a3a77cafc2ccd0764ecdb8b3ba735bc51fc Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 22 Oct 2015 15:20:17 -0700
Subject: [PATCH 334/896] [SPARK-11116][SQL] First Draft of Dataset API

*This PR adds a new experimental API to Spark, tentitively named Datasets.*

A `Dataset` is a strongly-typed collection of objects that can be transformed in parallel using functional or relational operations.  Example usage is as follows:

### Functional
```scala
> val ds: Dataset[Int] = Seq(1, 2, 3).toDS()
> ds.filter(_ % 1 == 0).collect()
res1: Array[Int] = Array(1, 2, 3)
```

### Relational
```scala
scala> ds.toDF().show()
+-----+
|value|
+-----+
|    1|
|    2|
|    3|
+-----+

> ds.select(expr("value + 1").as[Int]).collect()
res11: Array[Int] = Array(2, 3, 4)
```

## Comparison to RDDs
 A `Dataset` differs from an `RDD` in the following ways:
  - The creation of a `Dataset` requires the presence of an explicit `Encoder` that can be
    used to serialize the object into a binary format.  Encoders are also capable of mapping the
    schema of a given object to the Spark SQL type system.  In contrast, RDDs rely on runtime
    reflection based serialization.
  - Internally, a `Dataset` is represented by a Catalyst logical plan and the data is stored
    in the encoded form.  This representation allows for additional logical operations and
    enables many operations (sorting, shuffling, etc.) to be performed without deserializing to
    an object.

A `Dataset` can be converted to an `RDD` by calling the `.rdd` method.

## Comparison to DataFrames

A `Dataset` can be thought of as a specialized DataFrame, where the elements map to a specific
JVM object type, instead of to a generic `Row` container. A DataFrame can be transformed into
specific Dataset by calling `df.as[ElementType]`.  Similarly you can transform a strongly-typed
`Dataset` to a generic DataFrame by calling `ds.toDF()`.

## Implementation Status and TODOs

This is a rough cut at the least controversial parts of the API.  The primary purpose here is to get something committed so that we can better parallelize further work and get early feedback on the API.  The following is being deferred to future PRs:
 - Joins and Aggregations (prototype here https://github.com/apache/spark/commit/f11f91e6f08c8cf389b8388b626cd29eec32d937)
 - Support for Java

Additionally, the responsibility for binding an encoder to a given schema is currently done in a fairly ad-hoc fashion.  This is an internal detail, and what we are doing today works for the cases we care about.  However, as we add more APIs we'll probably need to do this in a more principled way (i.e. separate resolution from binding as we do in DataFrames).

## COMPATIBILITY NOTE
Long term we plan to make `DataFrame` extend `Dataset[Row]`.  However,
making this change to che class hierarchy would break the function signatures for the existing
function operations (map, flatMap, etc).  As such, this class should be considered a preview
of the final API.  Changes will be made to the interface after Spark 1.6.

Author: Michael Armbrust <michael@databricks.com>

Closes #9190 from marmbrus/dataset-infra.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |   8 +-
 .../sql/catalyst/encoders/ClassEncoder.scala  |  38 +-
 .../spark/sql/catalyst/encoders/Encoder.scala |  19 +-
 .../catalyst/encoders/ProductEncoder.scala    |  12 +-
 .../catalyst/encoders/primitiveTypes.scala    | 100 +++++
 .../spark/sql/catalyst/encoders/tuples.scala  | 173 ++++++++
 .../catalyst/expressions/AttributeMap.scala   |   7 +
 .../catalyst/expressions/AttributeSet.scala   |   4 +
 .../expressions/complexTypeCreator.scala      |   8 +
 .../sql/catalyst/expressions/package.scala    |  12 +
 .../plans/logical/basicOperators.scala        |  72 +++-
 .../encoders/PrimitiveEncoderSuite.scala      |  43 ++
 .../encoders/ProductEncoderSuite.scala        |  21 +-
 .../scala/org/apache/spark/sql/Column.scala   |  15 +
 .../org/apache/spark/sql/DataFrame.scala      |  11 +
 .../scala/org/apache/spark/sql/Dataset.scala  | 392 ++++++++++++++++++
 .../org/apache/spark/sql/DatasetHolder.scala  |  30 ++
 .../org/apache/spark/sql/GroupedDataset.scala |  68 +++
 .../org/apache/spark/sql/SQLContext.scala     |  12 +
 .../org/apache/spark/sql/SQLImplicits.scala   |  16 +-
 .../spark/sql/execution/GroupedIterator.scala | 141 +++++++
 .../spark/sql/execution/SparkStrategies.scala |   8 +
 .../spark/sql/execution/basicOperators.scala  |  79 ++++
 .../spark/sql/DatasetPrimitiveSuite.scala     | 103 +++++
 .../org/apache/spark/sql/DatasetSuite.scala   | 124 ++++++
 .../org/apache/spark/sql/QueryTest.scala      |   8 +
 26 files changed, 1501 insertions(+), 23 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 27c96f41221a..713c6b547d9b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -411,9 +411,9 @@ trait ScalaReflection {
   }
 
   /** Returns expressions for extracting all the fields from the given type. */
-  def extractorsFor[T : TypeTag](inputObject: Expression): Seq[Expression] = {
+  def extractorsFor[T : TypeTag](inputObject: Expression): CreateNamedStruct = {
     ScalaReflectionLock.synchronized {
-      extractorFor(inputObject, typeTag[T].tpe).asInstanceOf[CreateStruct].children
+      extractorFor(inputObject, typeTag[T].tpe).asInstanceOf[CreateNamedStruct]
     }
   }
 
@@ -497,11 +497,11 @@ trait ScalaReflection {
             }
           }
 
-          CreateStruct(params.head.map { p =>
+          CreateNamedStruct(params.head.flatMap { p =>
             val fieldName = p.name.toString
             val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
             val fieldValue = Invoke(inputObject, fieldName, dataTypeFor(fieldType))
-            extractorFor(fieldValue, fieldType)
+            expressions.Literal(fieldName) :: extractorFor(fieldValue, fieldType) :: Nil
           })
 
         case t if t <:< localTypeOf[Array[_]] =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
index 54096f18cbea..b484b8fde636 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.catalyst.encoders
 import scala.reflect.ClassTag
 
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, SimpleAnalyzer}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
 import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
@@ -41,9 +41,11 @@ case class ClassEncoder[T](
     clsTag: ClassTag[T])
   extends Encoder[T] {
 
-  private val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
+  @transient
+  private lazy val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
   private val inputRow = new GenericMutableRow(1)
 
+  @transient
   private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
   private val dataType = ObjectType(clsTag.runtimeClass)
 
@@ -64,4 +66,36 @@ case class ClassEncoder[T](
 
     copy(constructExpression = boundExpression)
   }
+
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): ClassEncoder[T] = {
+    val positionToAttribute = AttributeMap.toIndex(oldSchema)
+    val attributeToNewPosition = AttributeMap.byIndex(newSchema)
+    copy(constructExpression = constructExpression transform {
+      case r: BoundReference =>
+        r.copy(ordinal = attributeToNewPosition(positionToAttribute(r.ordinal)))
+    })
+  }
+
+  override def bindOrdinals(schema: Seq[Attribute]): ClassEncoder[T] = {
+    var remaining = schema
+    copy(constructExpression = constructExpression transform {
+      case u: UnresolvedAttribute =>
+        val pos = remaining.head
+        remaining = remaining.drop(1)
+        pos
+    })
+  }
+
+  protected val attrs = extractExpressions.map(_.collect {
+    case a: Attribute => s"#${a.exprId}"
+    case b: BoundReference => s"[${b.ordinal}]"
+  }.headOption.getOrElse(""))
+
+
+  protected val schemaString =
+    schema
+      .zip(attrs)
+      .map { case(f, a) => s"${f.name}$a: ${f.dataType.simpleString}"}.mkString(", ")
+
+  override def toString: String = s"class[$schemaString]"
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index bdb1c0959da8..efb872ddb81e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -31,6 +31,7 @@ import org.apache.spark.sql.types.StructType
  * and reuse internal buffers to improve performance.
  */
 trait Encoder[T] {
+
   /** Returns the schema of encoding this type of object as a Row. */
   def schema: StructType
 
@@ -46,13 +47,27 @@ trait Encoder[T] {
 
   /**
    * Returns an object of type `T`, extracting the required values from the provided row.  Note that
-   * you must bind the encoder to a specific schema before you can call this function.
+   * you must `bind` an encoder to a specific schema before you can call this function.
    */
   def fromRow(row: InternalRow): T
 
   /**
    * Returns a new copy of this encoder, where the expressions used by `fromRow` are bound to the
-   * given schema
+   * given schema.
    */
   def bind(schema: Seq[Attribute]): Encoder[T]
+
+  /**
+   * Binds this encoder to the given schema positionally.  In this binding, the first reference to
+   * any input is mapped to `schema(0)`, and so on for each input that is encountered.
+   */
+  def bindOrdinals(schema: Seq[Attribute]): Encoder[T]
+
+  /**
+   * Given an encoder that has already been bound to a given schema, returns a new encoder that
+   * where the positions are mapped from `oldSchema` to `newSchema`.  This can be used, for example,
+   * when you are trying to use an encoder on grouping keys that were orriginally part of a larger
+   * row, but now you have projected out only the key expressions.
+   */
+  def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[T]
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
index 4f7ce455ada9..34f5e6c030f5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -31,15 +31,17 @@ import org.apache.spark.sql.types.{ObjectType, StructType}
 object ProductEncoder {
   def apply[T <: Product : TypeTag]: ClassEncoder[T] = {
     // We convert the not-serializable TypeTag into StructType and ClassTag.
-    val schema = ScalaReflection.schemaFor[T].dataType.asInstanceOf[StructType]
     val mirror = typeTag[T].mirror
     val cls = mirror.runtimeClass(typeTag[T].tpe)
 
     val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
-    val extractExpressions = ScalaReflection.extractorsFor[T](inputObject)
+    val extractExpression = ScalaReflection.extractorsFor[T](inputObject)
     val constructExpression = ScalaReflection.constructorFor[T]
-    new ClassEncoder[T](schema, extractExpressions, constructExpression, ClassTag[T](cls))
-  }
-
 
+    new ClassEncoder[T](
+      extractExpression.dataType,
+      extractExpression.flatten,
+      constructExpression,
+      ClassTag[T](cls))
+  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
new file mode 100644
index 000000000000..a93f2d7c6115
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
@@ -0,0 +1,100 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.sql.types._
+
+/** An encoder for primitive Long types. */
+case class LongEncoder(fieldName: String = "value", ordinal: Int = 0) extends Encoder[Long] {
+  private val row = UnsafeRow.createFromByteArray(64, 1)
+
+  override def clsTag: ClassTag[Long] = ClassTag.Long
+  override def schema: StructType =
+    StructType(StructField(fieldName, LongType) :: Nil)
+
+  override def fromRow(row: InternalRow): Long = row.getLong(ordinal)
+
+  override def toRow(t: Long): InternalRow = {
+    row.setLong(ordinal, t)
+    row
+  }
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[Long] = this
+  override def bind(schema: Seq[Attribute]): Encoder[Long] = this
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[Long] = this
+}
+
+/** An encoder for primitive Integer types. */
+case class IntEncoder(fieldName: String = "value", ordinal: Int = 0) extends Encoder[Int] {
+  private val row = UnsafeRow.createFromByteArray(64, 1)
+
+  override def clsTag: ClassTag[Int] = ClassTag.Int
+  override def schema: StructType =
+    StructType(StructField(fieldName, IntegerType) :: Nil)
+
+  override def fromRow(row: InternalRow): Int = row.getInt(ordinal)
+
+  override def toRow(t: Int): InternalRow = {
+    row.setInt(ordinal, t)
+    row
+  }
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[Int] = this
+  override def bind(schema: Seq[Attribute]): Encoder[Int] = this
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[Int] = this
+}
+
+/** An encoder for String types. */
+case class StringEncoder(
+    fieldName: String = "value",
+    ordinal: Int = 0) extends Encoder[String] {
+
+  val record = new SpecificMutableRow(StringType :: Nil)
+
+  @transient
+  lazy val projection =
+    GenerateUnsafeProjection.generate(BoundReference(0, StringType, true) :: Nil)
+
+  override def schema: StructType =
+    StructType(
+      StructField("value", StringType, nullable = false) :: Nil)
+
+  override def clsTag: ClassTag[String] = scala.reflect.classTag[String]
+
+
+  override final def fromRow(row: InternalRow): String = {
+    row.getString(ordinal)
+  }
+
+  override final def toRow(value: String): InternalRow = {
+    val utf8String = UTF8String.fromString(value)
+    record(0) = utf8String
+    // TODO: this is a bit of a hack to produce UnsafeRows
+    projection(record)
+  }
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[String] = this
+  override def bind(schema: Seq[Attribute]): Encoder[String] = this
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[String] = this
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
new file mode 100644
index 000000000000..a48eeda7d2e6
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
@@ -0,0 +1,173 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.types.{StructField, StructType}
+
+// Most of this file is codegen.
+// scalastyle:off
+
+/**
+ * A set of composite encoders that take sub encoders and map each of their objects to a
+ * Scala tuple.  Note that currently the implementation is fairly limited and only supports going
+ * from an internal row to a tuple.
+ */
+object TupleEncoder {
+
+  /** Code generator for composite tuple encoders. */
+  def main(args: Array[String]): Unit = {
+    (2 to 5).foreach { i =>
+      val types = (1 to i).map(t => s"T$t").mkString(", ")
+      val tupleType = s"($types)"
+      val args = (1 to i).map(t => s"e$t: Encoder[T$t]").mkString(", ")
+      val fields = (1 to i).map(t => s"""StructField("_$t", e$t.schema)""").mkString(", ")
+      val fromRow = (1 to i).map(t => s"e$t.fromRow(row)").mkString(", ")
+
+      println(
+        s"""
+          |class Tuple${i}Encoder[$types]($args) extends Encoder[$tupleType] {
+          |  val schema = StructType(Array($fields))
+          |
+          |  def clsTag: ClassTag[$tupleType] = scala.reflect.classTag[$tupleType]
+          |
+          |  def fromRow(row: InternalRow): $tupleType = {
+          |    ($fromRow)
+          |  }
+          |
+          |  override def toRow(t: $tupleType): InternalRow =
+          |    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
+          |
+          |  override def bind(schema: Seq[Attribute]): Encoder[$tupleType] = {
+          |    this
+          |  }
+          |
+          |  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[$tupleType] =
+          |    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+          |
+          |
+          |  override def bindOrdinals(schema: Seq[Attribute]): Encoder[$tupleType] =
+          |    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+          |}
+        """.stripMargin)
+    }
+  }
+}
+
+class Tuple2Encoder[T1, T2](e1: Encoder[T1], e2: Encoder[T2]) extends Encoder[(T1, T2)] {
+  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema)))
+
+  def clsTag: ClassTag[(T1, T2)] = scala.reflect.classTag[(T1, T2)]
+
+  def fromRow(row: InternalRow): (T1, T2) = {
+    (e1.fromRow(row), e2.fromRow(row))
+  }
+
+  override def toRow(t: (T1, T2)): InternalRow =
+    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
+
+  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2)] = {
+    this
+  }
+
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+}
+
+
+class Tuple3Encoder[T1, T2, T3](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3]) extends Encoder[(T1, T2, T3)] {
+  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema)))
+
+  def clsTag: ClassTag[(T1, T2, T3)] = scala.reflect.classTag[(T1, T2, T3)]
+
+  def fromRow(row: InternalRow): (T1, T2, T3) = {
+    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row))
+  }
+
+  override def toRow(t: (T1, T2, T3)): InternalRow =
+    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
+
+  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3)] = {
+    this
+  }
+
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+}
+
+
+class Tuple4Encoder[T1, T2, T3, T4](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4]) extends Encoder[(T1, T2, T3, T4)] {
+  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema), StructField("_4", e4.schema)))
+
+  def clsTag: ClassTag[(T1, T2, T3, T4)] = scala.reflect.classTag[(T1, T2, T3, T4)]
+
+  def fromRow(row: InternalRow): (T1, T2, T3, T4) = {
+    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row), e4.fromRow(row))
+  }
+
+  override def toRow(t: (T1, T2, T3, T4)): InternalRow =
+    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
+
+  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] = {
+    this
+  }
+
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+}
+
+
+class Tuple5Encoder[T1, T2, T3, T4, T5](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4], e5: Encoder[T5]) extends Encoder[(T1, T2, T3, T4, T5)] {
+  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema), StructField("_4", e4.schema), StructField("_5", e5.schema)))
+
+  def clsTag: ClassTag[(T1, T2, T3, T4, T5)] = scala.reflect.classTag[(T1, T2, T3, T4, T5)]
+
+  def fromRow(row: InternalRow): (T1, T2, T3, T4, T5) = {
+    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row), e4.fromRow(row), e5.fromRow(row))
+  }
+
+  override def toRow(t: (T1, T2, T3, T4, T5)): InternalRow =
+    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
+
+  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] = {
+    this
+  }
+
+  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+
+
+  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] =
+    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala
index 96a11e352ec5..ef3cc554b79c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeMap.scala
@@ -26,6 +26,13 @@ object AttributeMap {
   def apply[A](kvs: Seq[(Attribute, A)]): AttributeMap[A] = {
     new AttributeMap(kvs.map(kv => (kv._1.exprId, kv)).toMap)
   }
+
+  /** Given a schema, constructs an [[AttributeMap]] from [[Attribute]] to ordinal */
+  def byIndex(schema: Seq[Attribute]): AttributeMap[Int] = apply(schema.zipWithIndex)
+
+  /** Given a schema, constructs a map from ordinal to Attribute. */
+  def toIndex(schema: Seq[Attribute]): Map[Int, Attribute] =
+    schema.zipWithIndex.map { case (a, i) => i -> a }.toMap
 }
 
 class AttributeMap[A](baseMap: Map[ExprId, (Attribute, A)])
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeSet.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeSet.scala
index 5345696570b4..383153557420 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeSet.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/AttributeSet.scala
@@ -31,6 +31,10 @@ protected class AttributeEquals(val a: Attribute) {
 }
 
 object AttributeSet {
+  /** Returns an empty [[AttributeSet]]. */
+  val empty = apply(Iterable.empty)
+
+  /** Constructs a new [[AttributeSet]] that contains a single [[Attribute]]. */
   def apply(a: Attribute): AttributeSet = new AttributeSet(Set(new AttributeEquals(a)))
 
   /** Constructs a new [[AttributeSet]] given a sequence of [[Expression Expressions]]. */
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
index a5f02e2463ae..059e45bd684e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
@@ -125,6 +125,14 @@ case class CreateStruct(children: Seq[Expression]) extends Expression {
  */
 case class CreateNamedStruct(children: Seq[Expression]) extends Expression {
 
+  /**
+   * Returns Aliased [[Expressions]] that could be used to construct a flattened version of this
+   * StructType.
+   */
+  def flatten: Seq[NamedExpression] = valExprs.zip(names).map {
+    case (v, n) => Alias(v, n.toString)()
+  }
+
   private lazy val (nameExprs, valExprs) =
     children.grouped(2).map { case Seq(name, value) => (name, value) }.toList.unzip
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala
index 30b7f8d3766a..f1fa13daa77e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/package.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.catalyst
 
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types.{StructField, StructType}
 
 /**
  * A set of classes that can be used to represent trees of relational expressions.  A key goal of
@@ -80,4 +81,15 @@ package object expressions  {
     /** Uses the given row to store the output of the projection. */
     def target(row: MutableRow): MutableProjection
   }
+
+
+  /**
+   * Helper functions for working with `Seq[Attribute]`.
+   */
+  implicit class AttributeSeq(attrs: Seq[Attribute]) {
+    /** Creates a StructType with a schema matching this `Seq[Attribute]`. */
+    def toStructType: StructType = {
+      StructType(attrs.map(a => StructField(a.name, a.dataType, a.nullable)))
+    }
+  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index ae9482c10f12..21a55a537184 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.catalyst.plans.logical
 
+import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.Utils
 import org.apache.spark.sql.catalyst.plans._
@@ -417,7 +418,7 @@ case class Distinct(child: LogicalPlan) extends UnaryNode {
 }
 
 /**
- * Return a new RDD that has exactly `numPartitions` partitions. Differs from
+ * Returns a new RDD that has exactly `numPartitions` partitions. Differs from
  * [[RepartitionByExpression]] as this method is called directly by DataFrame's, because the user
  * asked for `coalesce` or `repartition`. [[RepartitionByExpression]] is used when the consumer
  * of the output requires some specific ordering or distribution of the data.
@@ -443,3 +444,72 @@ case object OneRowRelation extends LeafNode {
   override def statistics: Statistics = Statistics(sizeInBytes = 1)
 }
 
+/**
+ * A relation produced by applying `func` to each partition of the `child`. tEncoder/uEncoder are
+ * used respectively to decode/encode from the JVM object representation expected by `func.`
+ */
+case class MapPartitions[T, U](
+    func: Iterator[T] => Iterator[U],
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    output: Seq[Attribute],
+    child: LogicalPlan) extends UnaryNode {
+  override def missingInput: AttributeSet = AttributeSet.empty
+}
+
+/** Factory for constructing new `AppendColumn` nodes. */
+object AppendColumn {
+  def apply[T : Encoder, U : Encoder](func: T => U, child: LogicalPlan): AppendColumn[T, U] = {
+    val attrs = implicitly[Encoder[U]].schema.toAttributes
+    new AppendColumn[T, U](func, implicitly[Encoder[T]], implicitly[Encoder[U]], attrs, child)
+  }
+}
+
+/**
+ * A relation produced by applying `func` to each partition of the `child`, concatenating the
+ * resulting columns at the end of the input row. tEncoder/uEncoder are used respectively to
+ * decode/encode from the JVM object representation expected by `func.`
+ */
+case class AppendColumn[T, U](
+    func: T => U,
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    newColumns: Seq[Attribute],
+    child: LogicalPlan) extends UnaryNode {
+  override def output: Seq[Attribute] = child.output ++ newColumns
+  override def missingInput: AttributeSet = super.missingInput -- newColumns
+}
+
+/** Factory for constructing new `MapGroups` nodes. */
+object MapGroups {
+  def apply[K : Encoder, T : Encoder, U : Encoder](
+      func: (K, Iterator[T]) => Iterator[U],
+      groupingAttributes: Seq[Attribute],
+      child: LogicalPlan): MapGroups[K, T, U] = {
+    new MapGroups(
+      func,
+      implicitly[Encoder[K]],
+      implicitly[Encoder[T]],
+      implicitly[Encoder[U]],
+      groupingAttributes,
+      implicitly[Encoder[U]].schema.toAttributes,
+      child)
+  }
+}
+
+/**
+ * Applies func to each unique group in `child`, based on the evaluation of `groupingAttributes`.
+ * Func is invoked with an object representation of the grouping key an iterator containing the
+ * object representation of all the rows with that key.
+ */
+case class MapGroups[K, T, U](
+    func: (K, Iterator[T]) => Iterator[U],
+    kEncoder: Encoder[K],
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    groupingAttributes: Seq[Attribute],
+    output: Seq[Attribute],
+    child: LogicalPlan) extends UnaryNode {
+  override def missingInput: AttributeSet = AttributeSet.empty
+}
+
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala
new file mode 100644
index 000000000000..52f8383faca9
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala
@@ -0,0 +1,43 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.SparkFunSuite
+
+class PrimitiveEncoderSuite extends SparkFunSuite {
+  test("long encoder") {
+    val enc = new LongEncoder()
+    val row = enc.toRow(10)
+    assert(row.getLong(0) == 10)
+    assert(enc.fromRow(row) == 10)
+  }
+
+  test("int encoder") {
+    val enc = new IntEncoder()
+    val row = enc.toRow(10)
+    assert(row.getInt(0) == 10)
+    assert(enc.fromRow(row) == 10)
+  }
+
+  test("string encoder") {
+    val enc = new StringEncoder()
+    val row = enc.toRow("test")
+    assert(row.getString(0) == "test")
+    assert(enc.fromRow(row) == "test")
+  }
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
index 02e43ddb3547..7735acbcbad4 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -248,12 +248,16 @@ class ProductEncoderSuite extends SparkFunSuite {
         val types =
           convertedBack.productIterator.filter(_ != null).map(_.getClass.getName).mkString(",")
 
-        val encodedData = convertedData.toSeq(encoder.schema).zip(encoder.schema).map {
-          case (a: ArrayData, StructField(_, at: ArrayType, _, _)) =>
-            a.toArray[Any](at.elementType).toSeq
-          case (other, _) =>
-            other
-        }.mkString("[", ",", "]")
+        val encodedData = try {
+          convertedData.toSeq(encoder.schema).zip(encoder.schema).map {
+            case (a: ArrayData, StructField(_, at: ArrayType, _, _)) =>
+              a.toArray[Any](at.elementType).toSeq
+            case (other, _) =>
+              other
+          }.mkString("[", ",", "]")
+        } catch {
+          case e: Throwable => s"Failed to toSeq: $e"
+        }
 
         fail(
           s"""Encoded/Decoded data does not match input data
@@ -272,8 +276,9 @@ class ProductEncoderSuite extends SparkFunSuite {
              |Construct Expressions:
              |${boundEncoder.constructExpression.treeString}
              |
-           """.stripMargin)
+         """.stripMargin)
+        }
       }
-    }
+
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 37d559c8e430..de11a1699afd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -17,11 +17,13 @@
 
 package org.apache.spark.sql
 
+
 import scala.language.implicitConversions
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.Logging
 import org.apache.spark.sql.functions.lit
+import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.types._
@@ -36,6 +38,11 @@ private[sql] object Column {
   def unapply(col: Column): Option[Expression] = Some(col.expr)
 }
 
+/**
+ * A [[Column]] where an [[Encoder]] has been given for the expected return type.
+ * @since 1.6.0
+ */
+class TypedColumn[T](expr: Expression)(implicit val encoder: Encoder[T]) extends Column(expr)
 
 /**
  * :: Experimental ::
@@ -69,6 +76,14 @@ class Column(protected[sql] val expr: Expression) extends Logging {
 
   override def hashCode: Int = this.expr.hashCode
 
+  /**
+   * Provides a type hint about the expected return value of this column.  This information can
+   * be used by operations such as `select` on a [[Dataset]] to automatically convert the
+   * results into the correct JVM types.
+   * @since 1.6.0
+   */
+  def as[T : Encoder]: TypedColumn[T] = new TypedColumn[T](expr)
+
   /**
    * Extracts a value or values from a complex type.
    * The following types of extraction are supported:
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 2f10aa9f3c44..bf25bcde208e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -34,6 +34,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
@@ -258,6 +259,16 @@ class DataFrame private[sql](
   // `rdd.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
   def toDF(): DataFrame = this
 
+  /**
+   * :: Experimental ::
+   * Converts this [[DataFrame]] to a strongly-typed [[Dataset]] containing objects of the
+   * specified type, `U`.
+   * @group basic
+   * @since 1.6.0
+   */
+  @Experimental
+  def as[U : Encoder]: Dataset[U] = new Dataset[U](sqlContext, queryExecution)
+
   /**
    * Returns a new [[DataFrame]] with columns renamed. This can be quite convenient in conversion
    * from a RDD of tuples into a [[DataFrame]] with meaningful names. For example:
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
new file mode 100644
index 000000000000..96213c763040
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -0,0 +1,392 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.encoders._
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.execution.QueryExecution
+import org.apache.spark.sql.types.StructType
+
+/**
+ * A [[Dataset]] is a strongly typed collection of objects that can be transformed in parallel
+ * using functional or relational operations.
+ *
+ * A [[Dataset]] differs from an [[RDD]] in the following ways:
+ *  - Internally, a [[Dataset]] is represented by a Catalyst logical plan and the data is stored
+ *    in the encoded form.  This representation allows for additional logical operations and
+ *    enables many operations (sorting, shuffling, etc.) to be performed without deserializing to
+ *    an object.
+ *  - The creation of a [[Dataset]] requires the presence of an explicit [[Encoder]] that can be
+ *    used to serialize the object into a binary format.  Encoders are also capable of mapping the
+ *    schema of a given object to the Spark SQL type system.  In contrast, RDDs rely on runtime
+ *    reflection based serialization. Operations that change the type of object stored in the
+ *    dataset also need an encoder for the new type.
+ *
+ * A [[Dataset]] can be thought of as a specialized DataFrame, where the elements map to a specific
+ * JVM object type, instead of to a generic [[Row]] container. A DataFrame can be transformed into
+ * specific Dataset by calling `df.as[ElementType]`.  Similarly you can transform a strongly-typed
+ * [[Dataset]] to a generic DataFrame by calling `ds.toDF()`.
+ *
+ * COMPATIBILITY NOTE: Long term we plan to make [[DataFrame]] extend `Dataset[Row]`.  However,
+ * making this change to the class hierarchy would break the function signatures for the existing
+ * functional operations (map, flatMap, etc).  As such, this class should be considered a preview
+ * of the final API.  Changes will be made to the interface after Spark 1.6.
+ *
+ * @since 1.6.0
+ */
+@Experimental
+class Dataset[T] private[sql](
+    @transient val sqlContext: SQLContext,
+    @transient val queryExecution: QueryExecution)(
+    implicit val encoder: Encoder[T]) extends Serializable {
+
+  private implicit def classTag = encoder.clsTag
+
+  private[sql] def this(sqlContext: SQLContext, plan: LogicalPlan)(implicit encoder: Encoder[T]) =
+    this(sqlContext, new QueryExecution(sqlContext, plan))
+
+  /** Returns the schema of the encoded form of the objects in this [[Dataset]]. */
+  def schema: StructType = encoder.schema
+
+  /* ************* *
+   *  Conversions  *
+   * ************* */
+
+  /**
+   * Returns a new `Dataset` where each record has been mapped on to the specified type.
+   * TODO: should bind here...
+   * TODO: document binding rules
+   * @since 1.6.0
+   */
+  def as[U : Encoder]: Dataset[U] = new Dataset(sqlContext, queryExecution)(implicitly[Encoder[U]])
+
+  /**
+   * Applies a logical alias to this [[Dataset]] that can be used to disambiguate columns that have
+   * the same name after two Datasets have been joined.
+   */
+  def as(alias: String): Dataset[T] = withPlan(Subquery(alias, _))
+
+  /**
+   * Converts this strongly typed collection of data to generic Dataframe.  In contrast to the
+   * strongly typed objects that Dataset operations work on, a Dataframe returns generic [[Row]]
+   * objects that allow fields to be accessed by ordinal or name.
+   */
+  def toDF(): DataFrame = DataFrame(sqlContext, logicalPlan)
+
+
+  /**
+   * Returns this Dataset.
+   * @since 1.6.0
+   */
+  def toDS(): Dataset[T] = this
+
+  /**
+   * Converts this Dataset to an RDD.
+   * @since 1.6.0
+   */
+  def rdd: RDD[T] = {
+    val tEnc = implicitly[Encoder[T]]
+    val input = queryExecution.analyzed.output
+    queryExecution.toRdd.mapPartitions { iter =>
+      val bound = tEnc.bind(input)
+      iter.map(bound.fromRow)
+    }
+  }
+
+  /* *********************** *
+   *  Functional Operations  *
+   * *********************** */
+
+  /**
+   * Concise syntax for chaining custom transformations.
+   * {{{
+   *   def featurize(ds: Dataset[T]) = ...
+   *
+   *   dataset
+   *     .transform(featurize)
+   *     .transform(...)
+   * }}}
+   *
+   * @since 1.6.0
+   */
+  def transform[U](t: Dataset[T] => Dataset[U]): Dataset[U] = t(this)
+
+  /**
+   * Returns a new [[Dataset]] that only contains elements where `func` returns `true`.
+   * @since 1.6.0
+   */
+  def filter(func: T => Boolean): Dataset[T] = mapPartitions(_.filter(func))
+
+  /**
+   * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
+   * @since 1.6.0
+   */
+  def map[U : Encoder](func: T => U): Dataset[U] = mapPartitions(_.map(func))
+
+  /**
+   * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
+   * @since 1.6.0
+   */
+  def mapPartitions[U : Encoder](func: Iterator[T] => Iterator[U]): Dataset[U] = {
+    new Dataset(
+      sqlContext,
+      MapPartitions[T, U](
+        func,
+        implicitly[Encoder[T]],
+        implicitly[Encoder[U]],
+        implicitly[Encoder[U]].schema.toAttributes,
+        logicalPlan))
+  }
+
+  def flatMap[U : Encoder](func: T => TraversableOnce[U]): Dataset[U] =
+    mapPartitions(_.flatMap(func))
+
+  /* ************** *
+   *  Side effects  *
+   * ************** */
+
+  /**
+   * Runs `func` on each element of this Dataset.
+   * @since 1.6.0
+   */
+  def foreach(func: T => Unit): Unit = rdd.foreach(func)
+
+  /**
+   * Runs `func` on each partition of this Dataset.
+   * @since 1.6.0
+   */
+  def foreachPartition(func: Iterator[T] => Unit): Unit = rdd.foreachPartition(func)
+
+  /* ************* *
+   *  Aggregation  *
+   * ************* */
+
+  /**
+   * Reduces the elements of this Dataset using the specified  binary function.  The given function
+   * must be commutative and associative or the result may be non-deterministic.
+   * @since 1.6.0
+   */
+  def reduce(func: (T, T) => T): T = rdd.reduce(func)
+
+  /**
+   * Aggregates the elements of each partition, and then the results for all the partitions, using a
+   * given associative and commutative function and a neutral "zero value".
+   *
+   * This behaves somewhat differently than the fold operations implemented for non-distributed
+   * collections in functional languages like Scala. This fold operation may be applied to
+   * partitions individually, and then those results will be folded into the final result.
+   * If op is not commutative, then the result may differ from that of a fold applied to a
+   * non-distributed collection.
+   * @since 1.6.0
+   */
+  def fold(zeroValue: T)(op: (T, T) => T): T = rdd.fold(zeroValue)(op)
+
+  /**
+   * Returns a [[GroupedDataset]] where the data is grouped by the given key function.
+   * @since 1.6.0
+   */
+  def groupBy[K : Encoder](func: T => K): GroupedDataset[K, T] = {
+    val inputPlan = queryExecution.analyzed
+    val withGroupingKey = AppendColumn(func, inputPlan)
+    val executed = sqlContext.executePlan(withGroupingKey)
+
+    new GroupedDataset(
+      implicitly[Encoder[K]].bindOrdinals(withGroupingKey.newColumns),
+      implicitly[Encoder[T]].bind(inputPlan.output),
+      executed,
+      inputPlan.output,
+      withGroupingKey.newColumns)
+  }
+
+  /* ****************** *
+   *  Typed Relational  *
+   * ****************** */
+
+  /**
+   * Returns a new [[Dataset]] by computing the given [[Column]] expression for each element.
+   *
+   * {{{
+   *   val ds = Seq(1, 2, 3).toDS()
+   *   val newDS = ds.select(e[Int]("value + 1"))
+   * }}}
+   * @since 1.6.0
+   */
+  def select[U1: Encoder](c1: TypedColumn[U1]): Dataset[U1] = {
+    new Dataset[U1](sqlContext, Project(Alias(c1.expr, "_1")() :: Nil, logicalPlan))
+  }
+
+  // Codegen
+  // scalastyle:off
+
+  /** sbt scalaShell; println(Seq(1).toDS().genSelect) */
+  private def genSelect: String = {
+    (2 to 5).map { n =>
+      val types = (1 to n).map(i =>s"U$i").mkString(", ")
+      val args = (1 to n).map(i => s"c$i: TypedColumn[U$i]").mkString(", ")
+      val encoders = (1 to n).map(i => s"c$i.encoder").mkString(", ")
+      val schema = (1 to n).map(i => s"""Alias(c$i.expr, "_$i")()""").mkString(" :: ")
+      s"""
+         |/**
+         | * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
+         | * @since 1.6.0
+         | */
+         |def select[$types]($args): Dataset[($types)] = {
+         |  implicit val te = new Tuple${n}Encoder($encoders)
+         |  new Dataset[($types)](sqlContext,
+         |    Project(
+         |      $schema :: Nil,
+         |      logicalPlan))
+         |}
+         |
+       """.stripMargin
+    }.mkString("\n")
+  }
+
+  /**
+   * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
+   * @since 1.6.0
+   */
+  def select[U1, U2](c1: TypedColumn[U1], c2: TypedColumn[U2]): Dataset[(U1, U2)] = {
+    implicit val te = new Tuple2Encoder(c1.encoder, c2.encoder)
+    new Dataset[(U1, U2)](sqlContext,
+      Project(
+        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Nil,
+        logicalPlan))
+  }
+
+
+
+  /**
+   * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
+   * @since 1.6.0
+   */
+  def select[U1, U2, U3](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3]): Dataset[(U1, U2, U3)] = {
+    implicit val te = new Tuple3Encoder(c1.encoder, c2.encoder, c3.encoder)
+    new Dataset[(U1, U2, U3)](sqlContext,
+      Project(
+        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Nil,
+        logicalPlan))
+  }
+
+
+
+  /**
+   * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
+   * @since 1.6.0
+   */
+  def select[U1, U2, U3, U4](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3], c4: TypedColumn[U4]): Dataset[(U1, U2, U3, U4)] = {
+    implicit val te = new Tuple4Encoder(c1.encoder, c2.encoder, c3.encoder, c4.encoder)
+    new Dataset[(U1, U2, U3, U4)](sqlContext,
+      Project(
+        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Alias(c4.expr, "_4")() :: Nil,
+        logicalPlan))
+  }
+
+
+
+  /**
+   * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
+   * @since 1.6.0
+   */
+  def select[U1, U2, U3, U4, U5](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3], c4: TypedColumn[U4], c5: TypedColumn[U5]): Dataset[(U1, U2, U3, U4, U5)] = {
+    implicit val te = new Tuple5Encoder(c1.encoder, c2.encoder, c3.encoder, c4.encoder, c5.encoder)
+    new Dataset[(U1, U2, U3, U4, U5)](sqlContext,
+      Project(
+        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Alias(c4.expr, "_4")() :: Alias(c5.expr, "_5")() :: Nil,
+        logicalPlan))
+  }
+
+  // scalastyle:on
+
+  /* **************** *
+   *  Set operations  *
+   * **************** */
+
+  /**
+   * Returns a new [[Dataset]] that contains only the unique elements of this [[Dataset]].
+   *
+   * Note that, equality checking is performed directly on the encoded representation of the data
+   * and thus is not affected by a custom `equals` function defined on `T`.
+   * @since 1.6.0
+   */
+  def distinct: Dataset[T] = withPlan(Distinct)
+
+  /**
+   * Returns a new [[Dataset]] that contains only the elements of this [[Dataset]] that are also
+   * present in `other`.
+   *
+   * Note that, equality checking is performed directly on the encoded representation of the data
+   * and thus is not affected by a custom `equals` function defined on `T`.
+   * @since 1.6.0
+   */
+  def intersect(other: Dataset[T]): Dataset[T] =
+    withPlan[T](other)(Intersect)
+
+  /**
+   * Returns a new [[Dataset]] that contains the elements of both this and the `other` [[Dataset]]
+   * combined.
+   *
+   * Note that, this function is not a typical set union operation, in that it does not eliminate
+   * duplicate items.  As such, it is analagous to `UNION ALL` in SQL.
+   * @since 1.6.0
+   */
+  def union(other: Dataset[T]): Dataset[T] =
+    withPlan[T](other)(Union)
+
+  /**
+   * Returns a new [[Dataset]] where any elements present in `other` have been removed.
+   *
+   * Note that, equality checking is performed directly on the encoded representation of the data
+   * and thus is not affected by a custom `equals` function defined on `T`.
+   * @since 1.6.0
+   */
+  def subtract(other: Dataset[T]): Dataset[T] = withPlan[T](other)(Except)
+
+  /* ************************** *
+   *  Gather to Driver Actions  *
+   * ************************** */
+
+  /** Returns the first element in this [[Dataset]]. */
+  def first(): T = rdd.first()
+
+  /** Collects the elements to an Array. */
+  def collect(): Array[T] = rdd.collect()
+
+  /** Returns the first `num` elements of this [[Dataset]] as an Array. */
+  def take(num: Int): Array[T] = rdd.take(num)
+
+  /* ******************** *
+   *  Internal Functions  *
+   * ******************** */
+
+  private[sql] def logicalPlan = queryExecution.analyzed
+
+  private[sql] def withPlan(f: LogicalPlan => LogicalPlan): Dataset[T] =
+    new Dataset[T](sqlContext, sqlContext.executePlan(f(logicalPlan)))
+
+  private[sql] def withPlan[R : Encoder](
+      other: Dataset[_])(
+      f: (LogicalPlan, LogicalPlan) => LogicalPlan): Dataset[R] =
+    new Dataset[R](
+      sqlContext,
+      sqlContext.executePlan(
+        f(logicalPlan, other.logicalPlan)))
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
new file mode 100644
index 000000000000..17817cbcc5e0
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
@@ -0,0 +1,30 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql
+
+/**
+ * A container for a [[DataFrame]], used for implicit conversions.
+ *
+ * @since 1.3.0
+ */
+private[sql] case class DatasetHolder[T](df: Dataset[T]) {
+
+  // This is declared with parentheses to prevent the Scala compiler from treating
+  // `rdd.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
+  def toDS(): Dataset[T] = df
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
new file mode 100644
index 000000000000..89a16dd8b0ac
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.execution.QueryExecution
+
+/**
+ * A [[Dataset]] has been logically grouped by a user specified grouping key.  Users should not
+ * construct a [[GroupedDataset]] directly, but should instead call `groupBy` on an existing
+ * [[Dataset]].
+ */
+class GroupedDataset[K, T] private[sql](
+    private val kEncoder: Encoder[K],
+    private val tEncoder: Encoder[T],
+    queryExecution: QueryExecution,
+    private val dataAttributes: Seq[Attribute],
+    private val groupingAttributes: Seq[Attribute]) extends Serializable {
+
+  private implicit def kEnc = kEncoder
+  private implicit def tEnc = tEncoder
+  private def logicalPlan = queryExecution.analyzed
+  private def sqlContext = queryExecution.sqlContext
+
+  /**
+   * Returns a [[Dataset]] that contains each unique key.
+   */
+  def keys: Dataset[K] = {
+    new Dataset[K](
+      sqlContext,
+      Distinct(
+        Project(groupingAttributes, logicalPlan)))
+  }
+
+  /**
+   * Applies the given function to each group of data.  For each unique group, the function will
+   * be passed the group key and an iterator that contains all of the elements in the group. The
+   * function can return an iterator containing elements of an arbitrary type which will be returned
+   * as a new [[Dataset]].
+   *
+   * Internally, the implementation will spill to disk if any given group is too large to fit into
+   * memory.  However, users must take care to avoid materializing the whole iterator for a group
+   * (for example, by calling `toList`) unless they are sure that this is possible given the memory
+   * constraints of their cluster.
+   */
+  def mapGroups[U : Encoder](f: (K, Iterator[T]) => Iterator[U]): Dataset[U] = {
+    new Dataset[U](
+      sqlContext,
+      MapGroups(f, groupingAttributes, logicalPlan))
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index a107639947aa..5e7198f97438 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -21,6 +21,7 @@ import java.beans.{BeanInfo, Introspector}
 import java.util.Properties
 import java.util.concurrent.atomic.AtomicReference
 
+
 import scala.collection.JavaConverters._
 import scala.collection.immutable
 import scala.reflect.runtime.universe.TypeTag
@@ -33,6 +34,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationEnd}
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.catalyst.analysis._
+import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.optimizer.{DefaultOptimizer, Optimizer}
@@ -487,6 +489,16 @@ class SQLContext private[sql](
     DataFrame(this, logicalPlan)
   }
 
+
+  def createDataset[T : Encoder](data: Seq[T]): Dataset[T] = {
+    val enc = implicitly[Encoder[T]]
+    val attributes = enc.schema.toAttributes
+    val encoded = data.map(d => enc.toRow(d).copy())
+    val plan = new LocalRelation(attributes, encoded)
+
+    new Dataset[T](this, plan)
+  }
+
   /**
    * Creates a DataFrame from an RDD[Row]. User can specify whether the input rows should be
    * converted to Catalyst rows.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index bf03c6108842..af8474df0de8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -17,6 +17,10 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.sql.catalyst.encoders._
+import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
+import org.apache.spark.sql.execution.datasources.LogicalRelation
+
 import scala.language.implicitConversions
 import scala.reflect.runtime.universe.TypeTag
 
@@ -30,9 +34,19 @@ import org.apache.spark.unsafe.types.UTF8String
 /**
  * A collection of implicit methods for converting common Scala objects into [[DataFrame]]s.
  */
-private[sql] abstract class SQLImplicits {
+abstract class SQLImplicits {
   protected def _sqlContext: SQLContext
 
+  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ProductEncoder[T]
+
+  implicit def newIntEncoder: Encoder[Int] = new IntEncoder()
+  implicit def newLongEncoder: Encoder[Long] = new LongEncoder()
+  implicit def newStringEncoder: Encoder[String] = new StringEncoder()
+
+  implicit def localSeqToDatasetHolder[T : Encoder](s: Seq[T]): DatasetHolder[T] = {
+    DatasetHolder(_sqlContext.createDataset(s))
+  }
+
   /**
    * An implicit conversion that turns a Scala `Symbol` into a [[Column]].
    * @since 1.3.0
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
new file mode 100644
index 000000000000..10742cf7348f
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
@@ -0,0 +1,141 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateUnsafeProjection, GenerateOrdering}
+import org.apache.spark.sql.catalyst.expressions.{Attribute, SortOrder, Ascending, Expression}
+
+object GroupedIterator {
+  def apply(
+      input: Iterator[InternalRow],
+      keyExpressions: Seq[Expression],
+      inputSchema: Seq[Attribute]): Iterator[(InternalRow, Iterator[InternalRow])] = {
+    if (input.hasNext) {
+      new GroupedIterator(input, keyExpressions, inputSchema)
+    } else {
+      Iterator.empty
+    }
+  }
+}
+
+/**
+ * Iterates over a presorted set of rows, chunking it up by the grouping expression.  Each call to
+ * next will return a pair containing the current group and an iterator that will return all the
+ * elements of that group.  Iterators for each group are lazily constructed by extracting rows
+ * from the input iterator.  As such, full groups are never materialized by this class.
+ *
+ * Example input:
+ * {{{
+ *   Input: [a, 1], [b, 2], [b, 3]
+ *   Grouping: x#1
+ *   InputSchema: x#1, y#2
+ * }}}
+ *
+ * Result:
+ * {{{
+ *   First call to next():  ([a], Iterator([a, 1])
+ *   Second call to next(): ([b], Iterator([b, 2], [b, 3])
+ * }}}
+ *
+ * Note, the class does not handle the case of an empty input for simplicity of implementation.
+ * Use the factory to construct a new instance.
+ *
+ * @param input An iterator of rows.  This iterator must be ordered by the groupingExpressions or
+ *              it is possible for the same group to appear more than once.
+ * @param groupingExpressions The set of expressions used to do grouping.  The result of evaluating
+ *                            these expressions will be returned as the first part of each call
+ *                            to `next()`.
+ * @param inputSchema The schema of the rows in the `input` iterator.
+ */
+class GroupedIterator private(
+    input: Iterator[InternalRow],
+    groupingExpressions: Seq[Expression],
+    inputSchema: Seq[Attribute])
+  extends Iterator[(InternalRow, Iterator[InternalRow])] {
+
+  /** Compares two input rows and returns 0 if they are in the same group. */
+  val sortOrder = groupingExpressions.map(SortOrder(_, Ascending))
+  val keyOrdering = GenerateOrdering.generate(sortOrder, inputSchema)
+
+  /** Creates a row containing only the key for a given input row. */
+  val keyProjection = GenerateUnsafeProjection.generate(groupingExpressions, inputSchema)
+
+  /**
+   * Holds null or the row that will be returned on next call to `next()` in the inner iterator.
+   */
+  var currentRow = input.next()
+
+  /** Holds a copy of an input row that is in the current group. */
+  var currentGroup = currentRow.copy()
+  var currentIterator: Iterator[InternalRow] = null
+  assert(keyOrdering.compare(currentGroup, currentRow) == 0)
+
+  // Return true if we already have the next iterator or fetching a new iterator is successful.
+  def hasNext: Boolean = currentIterator != null || fetchNextGroupIterator
+
+  def next(): (InternalRow, Iterator[InternalRow]) = {
+    assert(hasNext) // Ensure we have fetched the next iterator.
+    val ret = (keyProjection(currentGroup), currentIterator)
+    currentIterator = null
+    ret
+  }
+
+  def fetchNextGroupIterator(): Boolean = {
+    if (currentRow != null || input.hasNext) {
+      val inputIterator = new Iterator[InternalRow] {
+        // Return true if we have a row and it is in the current group, or if fetching a new row is
+        // successful.
+        def hasNext = {
+          (currentRow != null && keyOrdering.compare(currentGroup, currentRow) == 0) ||
+            fetchNextRowInGroup()
+        }
+
+        def fetchNextRowInGroup(): Boolean = {
+          if (currentRow != null || input.hasNext) {
+            currentRow = input.next()
+            if (keyOrdering.compare(currentGroup, currentRow) == 0) {
+              // The row is in the current group.  Continue the inner iterator.
+              true
+            } else {
+              // We got a row, but its not in the right group.  End this inner iterator and prepare
+              // for the next group.
+              currentIterator = null
+              currentGroup = currentRow.copy()
+              false
+            }
+          } else {
+            // There is no more input so we are done.
+            false
+          }
+        }
+
+        def next(): InternalRow = {
+          assert(hasNext) // Ensure we have fetched the next row.
+          val res = currentRow
+          currentRow = null
+          res
+        }
+      }
+      currentIterator = inputIterator
+      true
+    } else {
+      false
+    }
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 79bd1a41808d..637deff4e220 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -372,6 +372,14 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
       case logical.Distinct(child) =>
         throw new IllegalStateException(
           "logical distinct operator should have been replaced by aggregate in the optimizer")
+
+      case logical.MapPartitions(f, tEnc, uEnc, output, child) =>
+        execution.MapPartitions(f, tEnc, uEnc, output, planLater(child)) :: Nil
+      case logical.AppendColumn(f, tEnc, uEnc, newCol, child) =>
+        execution.AppendColumns(f, tEnc, uEnc, newCol, planLater(child)) :: Nil
+      case logical.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, child) =>
+        execution.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, planLater(child)) :: Nil
+
       case logical.Repartition(numPartitions, shuffle, child) =>
         if (shuffle) {
           execution.Exchange(RoundRobinPartitioning(numPartitions), planLater(child)) :: Nil
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index dc38fe59feed..2bb3dba5bd2b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -20,7 +20,9 @@ package org.apache.spark.sql.execution
 import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD, ShuffledRDD}
 import org.apache.spark.shuffle.sort.SortShuffleManager
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeRowJoiner
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.util.MutablePair
@@ -311,3 +313,80 @@ case class OutputFaker(output: Seq[Attribute], child: SparkPlan) extends SparkPl
 
   protected override def doExecute(): RDD[InternalRow] = child.execute()
 }
+
+/**
+ * Applies the given function to each input row and encodes the result.
+ */
+case class MapPartitions[T, U](
+    func: Iterator[T] => Iterator[U],
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    output: Seq[Attribute],
+    child: SparkPlan) extends UnaryNode {
+
+  override protected def doExecute(): RDD[InternalRow] = {
+    child.execute().mapPartitions { iter =>
+      val tBoundEncoder = tEncoder.bind(child.output)
+      func(iter.map(tBoundEncoder.fromRow)).map(uEncoder.toRow)
+    }
+  }
+}
+
+/**
+ * Applies the given function to each input row, appending the encoded result at the end of the row.
+ */
+case class AppendColumns[T, U](
+    func: T => U,
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    newColumns: Seq[Attribute],
+    child: SparkPlan) extends UnaryNode {
+
+  override def output: Seq[Attribute] = child.output ++ newColumns
+
+  override protected def doExecute(): RDD[InternalRow] = {
+    child.execute().mapPartitions { iter =>
+      val tBoundEncoder = tEncoder.bind(child.output)
+      val combiner = GenerateUnsafeRowJoiner.create(tEncoder.schema, uEncoder.schema)
+      iter.map { row =>
+        val newColumns = uEncoder.toRow(func(tBoundEncoder.fromRow(row)))
+        combiner.join(row.asInstanceOf[UnsafeRow], newColumns.asInstanceOf[UnsafeRow]): InternalRow
+      }
+    }
+  }
+}
+
+/**
+ * Groups the input rows together and calls the function with each group and an iterator containing
+ * all elements in the group.  The result of this function is encoded and flattened before
+ * being output.
+ */
+case class MapGroups[K, T, U](
+    func: (K, Iterator[T]) => Iterator[U],
+    kEncoder: Encoder[K],
+    tEncoder: Encoder[T],
+    uEncoder: Encoder[U],
+    groupingAttributes: Seq[Attribute],
+    output: Seq[Attribute],
+    child: SparkPlan) extends UnaryNode {
+
+  override def requiredChildDistribution: Seq[Distribution] =
+    ClusteredDistribution(groupingAttributes) :: Nil
+
+  override def requiredChildOrdering: Seq[Seq[SortOrder]] =
+    Seq(groupingAttributes.map(SortOrder(_, Ascending)))
+
+  override protected def doExecute(): RDD[InternalRow] = {
+    child.execute().mapPartitions { iter =>
+      val grouped = GroupedIterator(iter, groupingAttributes, child.output)
+      val groupKeyEncoder = kEncoder.bind(groupingAttributes)
+
+      grouped.flatMap { case (key, rowIter) =>
+        val result = func(
+          groupKeyEncoder.fromRow(key),
+          rowIter.map(tEncoder.fromRow))
+        result.map(uEncoder.toRow)
+      }
+    }
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
new file mode 100644
index 000000000000..32443557fb8e
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import scala.language.postfixOps
+
+import org.apache.spark.sql.test.SharedSQLContext
+
+case class IntClass(value: Int)
+
+class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
+  import testImplicits._
+
+  test("toDS") {
+    val data = Seq(1, 2, 3, 4, 5, 6)
+    checkAnswer(
+      data.toDS(),
+      data: _*)
+  }
+
+  test("as case class / collect") {
+    val ds = Seq(1, 2, 3).toDS().as[IntClass]
+    checkAnswer(
+      ds,
+      IntClass(1), IntClass(2), IntClass(3))
+
+    assert(ds.collect().head == IntClass(1))
+  }
+
+  test("map") {
+    val ds = Seq(1, 2, 3).toDS()
+    checkAnswer(
+      ds.map(_ + 1),
+      2, 3, 4)
+  }
+
+  test("filter") {
+    val ds = Seq(1, 2, 3, 4).toDS()
+    checkAnswer(
+      ds.filter(_ % 2 == 0),
+      2, 4)
+  }
+
+  test("foreach") {
+    val ds = Seq(1, 2, 3).toDS()
+    val acc = sparkContext.accumulator(0)
+    ds.foreach(acc +=)
+    assert(acc.value == 6)
+  }
+
+  test("foreachPartition") {
+    val ds = Seq(1, 2, 3).toDS()
+    val acc = sparkContext.accumulator(0)
+    ds.foreachPartition(_.foreach(acc +=))
+    assert(acc.value == 6)
+  }
+
+  test("reduce") {
+    val ds = Seq(1, 2, 3).toDS()
+    assert(ds.reduce(_ + _) == 6)
+  }
+
+  test("fold") {
+    val ds = Seq(1, 2, 3).toDS()
+    assert(ds.fold(0)(_ + _) == 6)
+  }
+
+  test("groupBy function, keys") {
+    val ds = Seq(1, 2, 3, 4, 5).toDS()
+    val grouped = ds.groupBy(_ % 2)
+    checkAnswer(
+      grouped.keys,
+      0, 1)
+  }
+
+  test("groupBy function, mapGroups") {
+    val ds = Seq(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).toDS()
+    val grouped = ds.groupBy(_ % 2)
+    val agged = grouped.mapGroups { case (g, iter) =>
+      val name = if (g == 0) "even" else "odd"
+      Iterator((name, iter.size))
+    }
+
+    checkAnswer(
+      agged,
+      ("even", 5), ("odd", 6))
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
new file mode 100644
index 000000000000..08496249c60c
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import scala.language.postfixOps
+
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.test.SharedSQLContext
+
+case class ClassData(a: String, b: Int)
+
+class DatasetSuite extends QueryTest with SharedSQLContext {
+  import testImplicits._
+
+  test("toDS") {
+    val data = Seq(("a", 1) , ("b", 2), ("c", 3))
+    checkAnswer(
+      data.toDS(),
+      data: _*)
+  }
+
+  test("as case class / collect") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDF("a", "b").as[ClassData]
+    checkAnswer(
+      ds,
+      ClassData("a", 1), ClassData("b", 2), ClassData("c", 3))
+    assert(ds.collect().head == ClassData("a", 1))
+  }
+
+  test("as case class - reordered fields by name") {
+    val ds = Seq((1, "a"), (2, "b"), (3, "c")).toDF("b", "a").as[ClassData]
+    assert(ds.collect() === Array(ClassData("a", 1), ClassData("b", 2), ClassData("c", 3)))
+  }
+
+  test("map") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.map(v => (v._1, v._2 + 1)),
+      ("a", 2), ("b", 3), ("c", 4))
+  }
+
+  test("select") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.select(expr("_2 + 1").as[Int]),
+      2, 3, 4)
+  }
+
+  test("select 3") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.select(
+        expr("_1").as[String],
+        expr("_2").as[Int],
+        expr("_2 + 1").as[Int]),
+      ("a", 1, 2), ("b", 2, 3), ("c", 3, 4))
+  }
+
+  test("filter") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.filter(_._1 == "b"),
+      ("b", 2))
+  }
+
+  test("foreach") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    val acc = sparkContext.accumulator(0)
+    ds.foreach(v => acc += v._2)
+    assert(acc.value == 6)
+  }
+
+  test("foreachPartition") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    val acc = sparkContext.accumulator(0)
+    ds.foreachPartition(_.foreach(v => acc += v._2))
+    assert(acc.value == 6)
+  }
+
+  test("reduce") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    assert(ds.reduce((a, b) => ("sum", a._2 + b._2)) == ("sum", 6))
+  }
+
+  test("fold") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    assert(ds.fold(("", 0))((a, b) => ("sum", a._2 + b._2)) == ("sum", 6))
+  }
+
+  test("groupBy function, keys") {
+    val ds = Seq(("a", 1), ("b", 1)).toDS()
+    val grouped = ds.groupBy(v => (1, v._2))
+    checkAnswer(
+      grouped.keys,
+      (1, 1))
+  }
+
+  test("groupBy function, mapGroups") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy(v => (v._1, "word"))
+    val agged = grouped.mapGroups { case (g, iter) =>
+      Iterator((g._1, iter.map(_._2).sum))
+    }
+
+    checkAnswer(
+      agged,
+      ("a", 30), ("b", 3), ("c", 1))
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index e3c5a426671d..aba567512fe3 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -20,10 +20,12 @@ package org.apache.spark.sql
 import java.util.{Locale, TimeZone}
 
 import scala.collection.JavaConverters._
+import scala.reflect.runtime.universe._
 
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.columnar.InMemoryRelation
+import org.apache.spark.sql.catalyst.encoders.{ProductEncoder, Encoder}
 
 abstract class QueryTest extends PlanTest {
 
@@ -53,6 +55,12 @@ abstract class QueryTest extends PlanTest {
     }
   }
 
+  protected def checkAnswer[T : Encoder](ds: => Dataset[T], expectedAnswer: T*): Unit = {
+    checkAnswer(
+      ds.toDF(),
+      sqlContext.createDataset(expectedAnswer).toDF().collect().toSeq)
+  }
+
   /**
    * Runs the plan and makes sure the answer matches the expected result.
    * @param df the [[DataFrame]] to be executed

From 163d53e829c166f061589cc379f61642d4c9a40f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Lipt=C3=A1k?= <gliptak@gmail.com>
Date: Thu, 22 Oct 2015 15:27:11 -0700
Subject: [PATCH 335/896] [SPARK-7021] Add JUnit output for Python unit tests
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

WIP

Author: Gábor Lipták <gliptak@gmail.com>

Closes #8323 from gliptak/SPARK-7021.
---
 python/pyspark/ml/tests.py        |  9 ++++++++-
 python/pyspark/mllib/tests.py     |  9 ++++++++-
 python/pyspark/sql/tests.py       |  9 ++++++++-
 python/pyspark/streaming/tests.py | 11 ++++++++++-
 python/pyspark/tests.py           | 19 ++++++++++++++-----
 5 files changed, 48 insertions(+), 9 deletions(-)

diff --git a/python/pyspark/ml/tests.py b/python/pyspark/ml/tests.py
index 6a2577d66f28..7a16cf52cccb 100644
--- a/python/pyspark/ml/tests.py
+++ b/python/pyspark/ml/tests.py
@@ -20,6 +20,10 @@
 """
 
 import sys
+try:
+    import xmlrunner
+except ImportError:
+    xmlrunner = None
 
 if sys.version_info[:2] <= (2, 6):
     try:
@@ -368,4 +372,7 @@ def test_fit_maximize_metric(self):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    if xmlrunner:
+        unittest.main(testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+    else:
+        unittest.main()
diff --git a/python/pyspark/mllib/tests.py b/python/pyspark/mllib/tests.py
index 2ad69a0ab1d3..f8e8e0e0adbe 100644
--- a/python/pyspark/mllib/tests.py
+++ b/python/pyspark/mllib/tests.py
@@ -31,6 +31,10 @@
 from numpy import sum as array_sum
 
 from py4j.protocol import Py4JJavaError
+try:
+    import xmlrunner
+except ImportError:
+    xmlrunner = None
 
 if sys.version > '3':
     basestring = str
@@ -1538,7 +1542,10 @@ def test_load_vectors(self):
 if __name__ == "__main__":
     if not _have_scipy:
         print("NOTE: Skipping SciPy tests as it does not seem to be installed")
-    unittest.main()
+    if xmlrunner:
+        unittest.main(testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+    else:
+        unittest.main()
     if not _have_scipy:
         print("NOTE: SciPy tests were skipped as it does not seem to be installed")
     sc.stop()
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index f465e1fa2094..6356d4bd6669 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -31,6 +31,10 @@
 import datetime
 
 import py4j
+try:
+    import xmlrunner
+except ImportError:
+    xmlrunner = None
 
 if sys.version_info[:2] <= (2, 6):
     try:
@@ -1222,4 +1226,7 @@ def test_window_functions_without_partitionBy(self):
 
 
 if __name__ == "__main__":
-    unittest.main()
+    if xmlrunner:
+        unittest.main(testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+    else:
+        unittest.main()
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 49634252fd46..2c908daa8b21 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -27,6 +27,11 @@
 import shutil
 from functools import reduce
 
+try:
+    import xmlrunner
+except ImportError:
+    xmlrunner = None
+
 if sys.version_info[:2] <= (2, 6):
     try:
         import unittest2 as unittest
@@ -1303,4 +1308,8 @@ def search_kinesis_asl_assembly_jar():
     for testcase in testcases:
         sys.stderr.write("[Running %s]\n" % (testcase))
         tests = unittest.TestLoader().loadTestsFromTestCase(testcase)
-        unittest.TextTestRunner(verbosity=3).run(tests)
+        if xmlrunner:
+            unittest.main(tests, verbosity=3,
+                          testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+        else:
+            unittest.TextTestRunner(verbosity=3).run(tests)
diff --git a/python/pyspark/tests.py b/python/pyspark/tests.py
index 3c5180944440..5bd94476597a 100644
--- a/python/pyspark/tests.py
+++ b/python/pyspark/tests.py
@@ -35,6 +35,10 @@
 import hashlib
 
 from py4j.protocol import Py4JJavaError
+try:
+    import xmlrunner
+except ImportError:
+    xmlrunner = None
 
 if sys.version_info[:2] <= (2, 6):
     try:
@@ -249,10 +253,12 @@ def __getattr__(self, item):
 
     # Regression test for SPARK-3415
     def test_pickling_file_handles(self):
-        ser = CloudPickleSerializer()
-        out1 = sys.stderr
-        out2 = ser.loads(ser.dumps(out1))
-        self.assertEqual(out1, out2)
+        # to be corrected with SPARK-11160
+        if not xmlrunner:
+            ser = CloudPickleSerializer()
+            out1 = sys.stderr
+            out2 = ser.loads(ser.dumps(out1))
+            self.assertEqual(out1, out2)
 
     def test_func_globals(self):
 
@@ -2006,7 +2012,10 @@ def test_statcounter_array(self):
         print("NOTE: Skipping SciPy tests as it does not seem to be installed")
     if not _have_numpy:
         print("NOTE: Skipping NumPy tests as it does not seem to be installed")
-    unittest.main()
+    if xmlrunner:
+        unittest.main(testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+    else:
+        unittest.main()
     if not _have_scipy:
         print("NOTE: SciPy tests were skipped as it does not seem to be installed")
     if not _have_numpy:

From 34e71c6d89c1f2b6236dbf0d75cd12da08003c84 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Thu, 22 Oct 2015 15:58:08 -0700
Subject: [PATCH 336/896] [SPARK-11251] Fix page size calculation in local mode

```
// My machine only has 8 cores
$ bin/spark-shell --master local[32]
scala> val df = sc.parallelize(Seq((1, 1), (2, 2))).toDF("a", "b")
scala> df.as("x").join(df.as("y"), $"x.a" === $"y.a").count()

Caused by: java.io.IOException: Unable to acquire 2097152 bytes of memory
	at org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter.acquireNewPage(UnsafeExternalSorter.java:351)
```

Author: Andrew Or <andrew@databricks.com>

Closes #9209 from andrewor14/fix-local-page-size.
---
 .../scala/org/apache/spark/SparkContext.scala | 48 ++++++++++++++-----
 .../scala/org/apache/spark/SparkEnv.scala     |  4 +-
 .../OutputCommitCoordinatorSuite.scala        |  3 +-
 3 files changed, 40 insertions(+), 15 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index ccba3ed9e643..a6857b4c7d88 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -269,7 +269,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
       conf: SparkConf,
       isLocal: Boolean,
       listenerBus: LiveListenerBus): SparkEnv = {
-    SparkEnv.createDriverEnv(conf, isLocal, listenerBus)
+    SparkEnv.createDriverEnv(conf, isLocal, listenerBus, SparkContext.numDriverCores(master))
   }
 
   private[spark] def env: SparkEnv = _env
@@ -2560,6 +2560,21 @@ object SparkContext extends Logging {
     res
   }
 
+  /**
+   * The number of driver cores to use for execution in local mode, 0 otherwise.
+   */
+  private[spark] def numDriverCores(master: String): Int = {
+    def convertToInt(threads: String): Int = {
+      if (threads == "*") Runtime.getRuntime.availableProcessors() else threads.toInt
+    }
+    master match {
+      case "local" => 1
+      case SparkMasterRegex.LOCAL_N_REGEX(threads) => convertToInt(threads)
+      case SparkMasterRegex.LOCAL_N_FAILURES_REGEX(threads, _) => convertToInt(threads)
+      case _ => 0 // driver is not used for execution
+    }
+  }
+
   /**
    * Create a task scheduler based on a given master URL.
    * Return a 2-tuple of the scheduler backend and the task scheduler.
@@ -2567,18 +2582,7 @@ object SparkContext extends Logging {
   private def createTaskScheduler(
       sc: SparkContext,
       master: String): (SchedulerBackend, TaskScheduler) = {
-    // Regular expression used for local[N] and local[*] master formats
-    val LOCAL_N_REGEX = """local\[([0-9]+|\*)\]""".r
-    // Regular expression for local[N, maxRetries], used in tests with failing tasks
-    val LOCAL_N_FAILURES_REGEX = """local\[([0-9]+|\*)\s*,\s*([0-9]+)\]""".r
-    // Regular expression for simulating a Spark cluster of [N, cores, memory] locally
-    val LOCAL_CLUSTER_REGEX = """local-cluster\[\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*]""".r
-    // Regular expression for connecting to Spark deploy clusters
-    val SPARK_REGEX = """spark://(.*)""".r
-    // Regular expression for connection to Mesos cluster by mesos:// or zk:// url
-    val MESOS_REGEX = """(mesos|zk)://.*""".r
-    // Regular expression for connection to Simr cluster
-    val SIMR_REGEX = """simr://(.*)""".r
+    import SparkMasterRegex._
 
     // When running locally, don't try to re-execute tasks on failure.
     val MAX_LOCAL_TASK_FAILURES = 1
@@ -2719,6 +2723,24 @@ object SparkContext extends Logging {
   }
 }
 
+/**
+ * A collection of regexes for extracting information from the master string.
+ */
+private object SparkMasterRegex {
+  // Regular expression used for local[N] and local[*] master formats
+  val LOCAL_N_REGEX = """local\[([0-9]+|\*)\]""".r
+  // Regular expression for local[N, maxRetries], used in tests with failing tasks
+  val LOCAL_N_FAILURES_REGEX = """local\[([0-9]+|\*)\s*,\s*([0-9]+)\]""".r
+  // Regular expression for simulating a Spark cluster of [N, cores, memory] locally
+  val LOCAL_CLUSTER_REGEX = """local-cluster\[\s*([0-9]+)\s*,\s*([0-9]+)\s*,\s*([0-9]+)\s*]""".r
+  // Regular expression for connecting to Spark deploy clusters
+  val SPARK_REGEX = """spark://(.*)""".r
+  // Regular expression for connection to Mesos cluster by mesos:// or zk:// url
+  val MESOS_REGEX = """(mesos|zk)://.*""".r
+  // Regular expression for connection to Simr cluster
+  val SIMR_REGEX = """simr://(.*)""".r
+}
+
 /**
  * A class encapsulating how to convert some type T to Writable. It stores both the Writable class
  * corresponding to T (e.g. IntWritable for Int) and a function for doing the conversion.
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 704158bfc764..b5c35c569e45 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -190,6 +190,7 @@ object SparkEnv extends Logging {
       conf: SparkConf,
       isLocal: Boolean,
       listenerBus: LiveListenerBus,
+      numCores: Int,
       mockOutputCommitCoordinator: Option[OutputCommitCoordinator] = None): SparkEnv = {
     assert(conf.contains("spark.driver.host"), "spark.driver.host is not set on the driver!")
     assert(conf.contains("spark.driver.port"), "spark.driver.port is not set on the driver!")
@@ -202,6 +203,7 @@ object SparkEnv extends Logging {
       port,
       isDriver = true,
       isLocal = isLocal,
+      numUsableCores = numCores,
       listenerBus = listenerBus,
       mockOutputCommitCoordinator = mockOutputCommitCoordinator
     )
@@ -241,8 +243,8 @@ object SparkEnv extends Logging {
       port: Int,
       isDriver: Boolean,
       isLocal: Boolean,
+      numUsableCores: Int,
       listenerBus: LiveListenerBus = null,
-      numUsableCores: Int = 0,
       mockOutputCommitCoordinator: Option[OutputCommitCoordinator] = None): SparkEnv = {
 
     // Listener bus is only used on the driver
diff --git a/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
index 6d08d7c5b7d2..48456a9cd6e7 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
@@ -87,7 +87,8 @@ class OutputCommitCoordinatorSuite extends SparkFunSuite with BeforeAndAfter {
         outputCommitCoordinator = spy(new OutputCommitCoordinator(conf, isDriver = true))
         // Use Mockito.spy() to maintain the default infrastructure everywhere else.
         // This mocking allows us to control the coordinator responses in test cases.
-        SparkEnv.createDriverEnv(conf, isLocal, listenerBus, Some(outputCommitCoordinator))
+        SparkEnv.createDriverEnv(conf, isLocal, listenerBus,
+          SparkContext.numDriverCores(master), Some(outputCommitCoordinator))
       }
     }
     // Use Mockito.spy() to maintain the default infrastructure everywhere else

From a88c66ca8780c7228dc909f904d31cd9464ee0e3 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Thu, 22 Oct 2015 21:01:01 -0700
Subject: [PATCH 337/896] [SPARK-11098][CORE] Add Outbox to cache the sending
 messages to resolve the message disorder issue

The current NettyRpc has a message order issue because it uses a thread pool to send messages. E.g., running the following two lines in the same thread,

```
ref.send("A")
ref.send("B")
```

The remote endpoint may see "B" before "A" because sending "A" and "B" are in parallel.
To resolve this issue, this PR added an outbox for each connection, and if we are connecting to the remote node when sending messages, just cache the sending messages in the outbox and send them one by one when the connection is established.

Author: zsxwing <zsxwing@gmail.com>

Closes #9197 from zsxwing/rpc-outbox.
---
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 145 +++++++-----
 .../org/apache/spark/rpc/netty/Outbox.scala   | 222 ++++++++++++++++++
 2 files changed, 310 insertions(+), 57 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala

diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index e01cf1a29e95..284284eb805b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -20,6 +20,7 @@ import java.io._
 import java.net.{InetSocketAddress, URI}
 import java.nio.ByteBuffer
 import java.util.concurrent._
+import java.util.concurrent.atomic.AtomicBoolean
 import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.mutable
@@ -70,12 +71,30 @@ private[netty] class NettyRpcEnv(
   // Because TransportClientFactory.createClient is blocking, we need to run it in this thread pool
   // to implement non-blocking send/ask.
   // TODO: a non-blocking TransportClientFactory.createClient in future
-  private val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
+  private[netty] val clientConnectionExecutor = ThreadUtils.newDaemonCachedThreadPool(
     "netty-rpc-connection",
     conf.getInt("spark.rpc.connect.threads", 64))
 
   @volatile private var server: TransportServer = _
 
+  private val stopped = new AtomicBoolean(false)
+
+  /**
+   * A map for [[RpcAddress]] and [[Outbox]]. When we are connecting to a remote [[RpcAddress]],
+   * we just put messages to its [[Outbox]] to implement a non-blocking `send` method.
+   */
+  private val outboxes = new ConcurrentHashMap[RpcAddress, Outbox]()
+
+  /**
+   * Remove the address's Outbox and stop it.
+   */
+  private[netty] def removeOutbox(address: RpcAddress): Unit = {
+    val outbox = outboxes.remove(address)
+    if (outbox != null) {
+      outbox.stop()
+    }
+  }
+
   def start(port: Int): Unit = {
     val bootstraps: java.util.List[TransportServerBootstrap] =
       if (securityManager.isAuthenticationEnabled()) {
@@ -116,6 +135,30 @@ private[netty] class NettyRpcEnv(
     dispatcher.stop(endpointRef)
   }
 
+  private def postToOutbox(address: RpcAddress, message: OutboxMessage): Unit = {
+    val targetOutbox = {
+      val outbox = outboxes.get(address)
+      if (outbox == null) {
+        val newOutbox = new Outbox(this, address)
+        val oldOutbox = outboxes.putIfAbsent(address, newOutbox)
+        if (oldOutbox == null) {
+          newOutbox
+        } else {
+          oldOutbox
+        }
+      } else {
+        outbox
+      }
+    }
+    if (stopped.get) {
+      // It's possible that we put `targetOutbox` after stopping. So we need to clean it.
+      outboxes.remove(address)
+      targetOutbox.stop()
+    } else {
+      targetOutbox.send(message)
+    }
+  }
+
   private[netty] def send(message: RequestMessage): Unit = {
     val remoteAddr = message.receiver.address
     if (remoteAddr == address) {
@@ -127,37 +170,28 @@ private[netty] class NettyRpcEnv(
           val ack = response.asInstanceOf[Ack]
           logTrace(s"Received ack from ${ack.sender}")
         case Failure(e) =>
-          logError(s"Exception when sending $message", e)
+          logWarning(s"Exception when sending $message", e)
       }(ThreadUtils.sameThread)
     } else {
       // Message to a remote RPC endpoint.
-      try {
-        // `createClient` will block if it cannot find a known connection, so we should run it in
-        // clientConnectionExecutor
-        clientConnectionExecutor.execute(new Runnable {
-          override def run(): Unit = Utils.tryLogNonFatalError {
-            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
-            client.sendRpc(serialize(message), new RpcResponseCallback {
-
-              override def onFailure(e: Throwable): Unit = {
-                logError(s"Exception when sending $message", e)
-              }
-
-              override def onSuccess(response: Array[Byte]): Unit = {
-                val ack = deserialize[Ack](response)
-                logDebug(s"Receive ack from ${ack.sender}")
-              }
-            })
-          }
-        })
-      } catch {
-        case e: RejectedExecutionException =>
-          // `send` after shutting clientConnectionExecutor down, ignore it
-          logWarning(s"Cannot send $message because RpcEnv is stopped")
-      }
+      postToOutbox(remoteAddr, OutboxMessage(serialize(message), new RpcResponseCallback {
+
+        override def onFailure(e: Throwable): Unit = {
+          logWarning(s"Exception when sending $message", e)
+        }
+
+        override def onSuccess(response: Array[Byte]): Unit = {
+          val ack = deserialize[Ack](response)
+          logDebug(s"Receive ack from ${ack.sender}")
+        }
+      }))
     }
   }
 
+  private[netty] def createClient(address: RpcAddress): TransportClient = {
+    clientFactory.createClient(address.host, address.port)
+  }
+
   private[netty] def ask(message: RequestMessage): Future[Any] = {
     val promise = Promise[Any]()
     val remoteAddr = message.receiver.address
@@ -180,39 +214,25 @@ private[netty] class NettyRpcEnv(
           }
       }(ThreadUtils.sameThread)
     } else {
-      try {
-        // `createClient` will block if it cannot find a known connection, so we should run it in
-        // clientConnectionExecutor
-        clientConnectionExecutor.execute(new Runnable {
-          override def run(): Unit = {
-            val client = clientFactory.createClient(remoteAddr.host, remoteAddr.port)
-            client.sendRpc(serialize(message), new RpcResponseCallback {
-
-              override def onFailure(e: Throwable): Unit = {
-                if (!promise.tryFailure(e)) {
-                  logWarning("Ignore Exception", e)
-                }
-              }
-
-              override def onSuccess(response: Array[Byte]): Unit = {
-                val reply = deserialize[AskResponse](response)
-                if (reply.reply.isInstanceOf[RpcFailure]) {
-                  if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
-                    logWarning(s"Ignore failure: ${reply.reply}")
-                  }
-                } else if (!promise.trySuccess(reply.reply)) {
-                  logWarning(s"Ignore message: ${reply}")
-                }
-              }
-            })
-          }
-        })
-      } catch {
-        case e: RejectedExecutionException =>
+      postToOutbox(remoteAddr, OutboxMessage(serialize(message), new RpcResponseCallback {
+
+        override def onFailure(e: Throwable): Unit = {
           if (!promise.tryFailure(e)) {
-            logWarning(s"Ignore failure", e)
+            logWarning("Ignore Exception", e)
           }
-      }
+        }
+
+        override def onSuccess(response: Array[Byte]): Unit = {
+          val reply = deserialize[AskResponse](response)
+          if (reply.reply.isInstanceOf[RpcFailure]) {
+            if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
+              logWarning(s"Ignore failure: ${reply.reply}")
+            }
+          } else if (!promise.trySuccess(reply.reply)) {
+            logWarning(s"Ignore message: ${reply}")
+          }
+        }
+      }))
     }
     promise.future
   }
@@ -245,6 +265,16 @@ private[netty] class NettyRpcEnv(
   }
 
   private def cleanup(): Unit = {
+    if (!stopped.compareAndSet(false, true)) {
+      return
+    }
+
+    val iter = outboxes.values().iterator()
+    while (iter.hasNext()) {
+      val outbox = iter.next()
+      outboxes.remove(outbox.address)
+      outbox.stop()
+    }
     if (timeoutScheduler != null) {
       timeoutScheduler.shutdownNow()
     }
@@ -463,6 +493,7 @@ private[netty] class NettyRpcHandler(
     val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      nettyEnv.removeOutbox(clientAddr)
       val messageOpt: Option[RemoteProcessDisconnected] =
       synchronized {
         remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala
new file mode 100644
index 000000000000..7d9d593b3624
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala
@@ -0,0 +1,222 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rpc.netty
+
+import java.util.concurrent.Callable
+import javax.annotation.concurrent.GuardedBy
+
+import scala.util.control.NonFatal
+
+import org.apache.spark.SparkException
+import org.apache.spark.network.client.{RpcResponseCallback, TransportClient}
+import org.apache.spark.rpc.RpcAddress
+
+private[netty] case class OutboxMessage(content: Array[Byte], callback: RpcResponseCallback)
+
+private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
+
+  outbox => // Give this an alias so we can use it more clearly in closures.
+
+  @GuardedBy("this")
+  private val messages = new java.util.LinkedList[OutboxMessage]
+
+  @GuardedBy("this")
+  private var client: TransportClient = null
+
+  /**
+   * connectFuture points to the connect task. If there is no connect task, connectFuture will be
+   * null.
+   */
+  @GuardedBy("this")
+  private var connectFuture: java.util.concurrent.Future[Unit] = null
+
+  @GuardedBy("this")
+  private var stopped = false
+
+  /**
+   * If there is any thread draining the message queue
+   */
+  @GuardedBy("this")
+  private var draining = false
+
+  /**
+   * Send a message. If there is no active connection, cache it and launch a new connection. If
+   * [[Outbox]] is stopped, the sender will be notified with a [[SparkException]].
+   */
+  def send(message: OutboxMessage): Unit = {
+    val dropped = synchronized {
+      if (stopped) {
+        true
+      } else {
+        messages.add(message)
+        false
+      }
+    }
+    if (dropped) {
+      message.callback.onFailure(new SparkException("Message is dropped because Outbox is stopped"))
+    } else {
+      drainOutbox()
+    }
+  }
+
+  /**
+   * Drain the message queue. If there is other draining thread, just exit. If the connection has
+   * not been established, launch a task in the `nettyEnv.clientConnectionExecutor` to setup the
+   * connection.
+   */
+  private def drainOutbox(): Unit = {
+    var message: OutboxMessage = null
+    synchronized {
+      if (stopped) {
+        return
+      }
+      if (connectFuture != null) {
+        // We are connecting to the remote address, so just exit
+        return
+      }
+      if (client == null) {
+        // There is no connect task but client is null, so we need to launch the connect task.
+        launchConnectTask()
+        return
+      }
+      if (draining) {
+        // There is some thread draining, so just exit
+        return
+      }
+      message = messages.poll()
+      if (message == null) {
+        return
+      }
+      draining = true
+    }
+    while (true) {
+      try {
+        val _client = synchronized { client }
+        if (_client != null) {
+          _client.sendRpc(message.content, message.callback)
+        } else {
+          assert(stopped == true)
+        }
+      } catch {
+        case NonFatal(e) =>
+          handleNetworkFailure(e)
+          return
+      }
+      synchronized {
+        if (stopped) {
+          return
+        }
+        message = messages.poll()
+        if (message == null) {
+          draining = false
+          return
+        }
+      }
+    }
+  }
+
+  private def launchConnectTask(): Unit = {
+    connectFuture = nettyEnv.clientConnectionExecutor.submit(new Callable[Unit] {
+
+      override def call(): Unit = {
+        try {
+          val _client = nettyEnv.createClient(address)
+          outbox.synchronized {
+            client = _client
+            if (stopped) {
+              closeClient()
+            }
+          }
+        } catch {
+          case ie: InterruptedException =>
+            // exit
+            return
+          case NonFatal(e) =>
+            outbox.synchronized { connectFuture = null }
+            handleNetworkFailure(e)
+            return
+        }
+        outbox.synchronized { connectFuture = null }
+        // It's possible that no thread is draining now. If we don't drain here, we cannot send the
+        // messages until the next message arrives.
+        drainOutbox()
+      }
+    })
+  }
+
+  /**
+   * Stop [[Inbox]] and notify the waiting messages with the cause.
+   */
+  private def handleNetworkFailure(e: Throwable): Unit = {
+    synchronized {
+      assert(connectFuture == null)
+      if (stopped) {
+        return
+      }
+      stopped = true
+      closeClient()
+    }
+    // Remove this Outbox from nettyEnv so that the further messages will create a new Outbox along
+    // with a new connection
+    nettyEnv.removeOutbox(address)
+
+    // Notify the connection failure for the remaining messages
+    //
+    // We always check `stopped` before updating messages, so here we can make sure no thread will
+    // update messages and it's safe to just drain the queue.
+    var message = messages.poll()
+    while (message != null) {
+      message.callback.onFailure(e)
+      message = messages.poll()
+    }
+    assert(messages.isEmpty)
+  }
+
+  private def closeClient(): Unit = synchronized {
+    // Not sure if `client.close` is idempotent. Just for safety.
+    if (client != null) {
+      client.close()
+    }
+    client = null
+  }
+
+  /**
+   * Stop [[Outbox]]. The remaining messages in the [[Outbox]] will be notified with a
+   * [[SparkException]].
+   */
+  def stop(): Unit = {
+    synchronized {
+      if (stopped) {
+        return
+      }
+      stopped = true
+      if (connectFuture != null) {
+        connectFuture.cancel(true)
+      }
+      closeClient()
+    }
+
+    // We always check `stopped` before updating messages, so here we can make sure no thread will
+    // update messages and it's safe to just drain the queue.
+    var message = messages.poll()
+    while (message != null) {
+      message.callback.onFailure(new SparkException("Message is dropped because Outbox is stopped"))
+      message = messages.poll()
+    }
+  }
+}

From fa6a4fbf08c8cca36cbe9f0d2bd20bc7be2ca45d Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 22 Oct 2015 22:41:21 -0700
Subject: [PATCH 338/896] [SPARK-11134][CORE] Increase LauncherBackendSuite
 timeout.

This test can take a little while to finish on slow / loaded machines.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9235 from vanzin/SPARK-11134.
---
 .../org/apache/spark/launcher/LauncherBackendSuite.scala      | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala b/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
index 07e8869833e9..639d1daa36c7 100644
--- a/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
+++ b/core/src/test/scala/org/apache/spark/launcher/LauncherBackendSuite.scala
@@ -54,13 +54,13 @@ class LauncherBackendSuite extends SparkFunSuite with Matchers {
       .startApplication()
 
     try {
-      eventually(timeout(10 seconds), interval(100 millis)) {
+      eventually(timeout(30 seconds), interval(100 millis)) {
         handle.getAppId() should not be (null)
       }
 
       handle.stop()
 
-      eventually(timeout(10 seconds), interval(100 millis)) {
+      eventually(timeout(30 seconds), interval(100 millis)) {
         handle.getState() should be (SparkAppHandle.State.KILLED)
       }
     } finally {

From b1c1597e3c47f1912809f3c5ab21833fa4241b54 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Thu, 22 Oct 2015 22:42:15 -0700
Subject: [PATCH 339/896] Fix a (very tiny) typo

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #9230 from jaceklaskowski/utils-seconds-typo.
---
 core/src/main/scala/org/apache/spark/util/Utils.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 55950405f048..5a976ee839b1 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -952,7 +952,7 @@ private[spark] object Utils extends Logging {
   }
 
   /**
-   * Convert a time parameter such as (50s, 100ms, or 250us) to microseconds for internal use. If
+   * Convert a time parameter such as (50s, 100ms, or 250us) to seconds for internal use. If
    * no suffix is provided, the passed number is assumed to be in seconds.
    */
   def timeStringAsSeconds(str: String): Long = {

From cdea0174e32a5f4c28fd59899b2e9774994303d5 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Fri, 23 Oct 2015 00:00:21 -0700
Subject: [PATCH 340/896] [SPARK-11273][SQL] Move
 ArrayData/MapData/DataTypeParser to catalyst.util package

Author: Reynold Xin <rxin@databricks.com>

Closes #9239 from rxin/types-private.
---
 .../apache/spark/mllib/linalg/Matrices.scala  |  1 +
 .../apache/spark/mllib/linalg/Vectors.scala   |  1 +
 .../expressions/SpecializedGetters.java       |  4 ++--
 .../catalyst/expressions/UnsafeArrayData.java |  1 +
 .../catalyst/expressions/UnsafeMapData.java   |  2 +-
 .../execution/UnsafeExternalRowSorter.java    |  2 +-
 .../sql/catalyst/CatalystTypeConverters.scala |  2 +-
 .../spark/sql/catalyst/ScalaReflection.scala  |  2 +-
 .../apache/spark/sql/catalyst/SqlParser.scala |  1 +
 .../sql/catalyst/encoders/RowEncoder.scala    |  2 +-
 .../spark/sql/catalyst/expressions/Cast.scala |  2 +-
 .../sql/catalyst/expressions/JoinedRow.scala  |  1 +
 .../sql/catalyst/expressions/aggregates.scala |  2 +-
 .../expressions/codegen/CodeGenerator.scala   |  1 +
 .../codegen/GenerateSafeProjection.scala      |  1 +
 .../expressions/collectionOperations.scala    |  1 +
 .../expressions/complexTypeCreator.scala      |  2 +-
 .../expressions/complexTypeExtractors.scala   |  1 +
 .../sql/catalyst/expressions/generators.scala |  1 +
 .../sql/catalyst/expressions/objects.scala    |  1 +
 .../expressions/regexpExpressions.scala       |  2 +-
 .../spark/sql/catalyst/expressions/rows.scala |  1 +
 .../expressions/stringExpressions.scala       |  1 +
 .../util}/AbstractScalaRowIterator.scala      |  2 +-
 .../util}/ArrayBasedMapData.scala             |  4 ++--
 .../{types => catalyst/util}/ArrayData.scala  |  3 ++-
 .../util}/DataTypeParser.scala                |  3 ++-
 .../util}/GenericArrayData.scala              |  3 ++-
 .../{types => catalyst/util}/MapData.scala    |  4 +++-
 .../apache/spark/sql/types/StructType.scala   |  2 +-
 .../encoders/ProductEncoderSuite.scala        | 20 +++++++++----------
 .../expressions/UnsafeRowConverterSuite.scala |  2 +-
 .../codegen/GeneratedProjectionSuite.scala    |  1 +
 .../util}/DataTypeParserSuite.scala           |  3 ++-
 .../types/{decimal => }/DecimalSuite.scala    |  3 +--
 .../scala/org/apache/spark/sql/Column.scala   |  4 ++--
 .../sql/execution/datasources/DDLParser.scala |  1 +
 .../datasources/json/JacksonGenerator.scala   |  2 +-
 .../datasources/json/JacksonParser.scala      |  2 +-
 .../parquet/CatalystRowConverter.scala        |  2 +-
 .../apache/spark/sql/execution/python.scala   |  3 ++-
 .../spark/sql/test/ExamplePointUDT.scala      |  1 +
 .../org/apache/spark/sql/UnsafeRowSuite.scala |  5 +++--
 .../spark/sql/UserDefinedTypeSuite.scala      |  2 ++
 .../sql/columnar/ColumnarTestUtils.scala      |  3 ++-
 .../execution/RowFormatConvertersSuite.scala  |  3 ++-
 .../spark/sql/hive/HiveInspectors.scala       |  6 +++---
 .../spark/sql/hive/HiveMetastoreCatalog.scala |  3 ++-
 .../org/apache/spark/sql/hive/hiveUDFs.scala  |  1 +
 .../spark/sql/hive/HiveInspectorSuite.scala   |  1 +
 50 files changed, 76 insertions(+), 48 deletions(-)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{ => catalyst/util}/AbstractScalaRowIterator.scala (96%)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{types => catalyst/util}/ArrayBasedMapData.scala (96%)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{types => catalyst/util}/ArrayData.scala (97%)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{types => catalyst/util}/DataTypeParser.scala (98%)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{types => catalyst/util}/GenericArrayData.scala (98%)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{types => catalyst/util}/MapData.scala (93%)
 rename sql/catalyst/src/test/scala/org/apache/spark/sql/{types => catalyst/util}/DataTypeParserSuite.scala (98%)
 rename sql/catalyst/src/test/scala/org/apache/spark/sql/types/{decimal => }/DecimalSuite.scala (99%)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
index 8ba6e4e78d96..8879dcf75c9b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
@@ -26,6 +26,7 @@ import breeze.linalg.{CSCMatrix => BSM, DenseMatrix => BDM, Matrix => BM}
 import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.types._
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
index 3642e9286504..dcdc614455d3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
@@ -30,6 +30,7 @@ import org.apache.spark.annotation.{AlphaComponent, Since}
 import org.apache.spark.mllib.util.NumericParser
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.types._
 
 /**
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/SpecializedGetters.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/SpecializedGetters.java
index 8f1027f3164c..eea7149d0259 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/SpecializedGetters.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/SpecializedGetters.java
@@ -18,10 +18,10 @@
 package org.apache.spark.sql.catalyst.expressions;
 
 import org.apache.spark.sql.catalyst.InternalRow;
-import org.apache.spark.sql.types.ArrayData;
+import org.apache.spark.sql.catalyst.util.ArrayData;
 import org.apache.spark.sql.types.DataType;
 import org.apache.spark.sql.types.Decimal;
-import org.apache.spark.sql.types.MapData;
+import org.apache.spark.sql.catalyst.util.MapData;
 import org.apache.spark.unsafe.types.CalendarInterval;
 import org.apache.spark.unsafe.types.UTF8String;
 
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
index 761f0447943e..3513960b4181 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeArrayData.java
@@ -21,6 +21,7 @@
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
 
+import org.apache.spark.sql.catalyst.util.ArrayData;
 import org.apache.spark.sql.types.*;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
index 5bebe2a96e39..651eb1ff0c56 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeMapData.java
@@ -19,7 +19,7 @@
 
 import java.nio.ByteBuffer;
 
-import org.apache.spark.sql.types.MapData;
+import org.apache.spark.sql.catalyst.util.MapData;
 import org.apache.spark.unsafe.Platform;
 
 /**
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
index 1d27182912c8..7d94e0566faa 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
@@ -26,7 +26,7 @@
 
 import org.apache.spark.SparkEnv;
 import org.apache.spark.TaskContext;
-import org.apache.spark.sql.AbstractScalaRowIterator;
+import org.apache.spark.sql.catalyst.util.AbstractScalaRowIterator;
 import org.apache.spark.sql.catalyst.InternalRow;
 import org.apache.spark.sql.catalyst.expressions.UnsafeProjection;
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
index f25591794abd..2ec0ff53c89c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystTypeConverters.scala
@@ -27,7 +27,7 @@ import scala.language.existentials
 
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 713c6b547d9b..c25161ee81b6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.catalyst
 
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedExtractValue, UnresolvedAttribute}
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData, ArrayData, DateTimeUtils}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
 import org.apache.spark.sql.types._
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 08ca325b2177..833368b7d589 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -24,6 +24,7 @@ import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.CalendarInterval
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index 5142856afdca..e9cc00a2b64c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -22,7 +22,7 @@ import scala.reflect.ClassTag
 
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData, DateTimeUtils}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
index 99d7444dc470..5564e242b047 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
@@ -22,7 +22,7 @@ import java.math.{BigDecimal => JavaBigDecimal}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen._
-import org.apache.spark.sql.catalyst.util.{StringUtils, DateTimeUtils}
+import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/JoinedRow.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/JoinedRow.scala
index d3560df0792e..935c3aa28c99 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/JoinedRow.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/JoinedRow.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index 95061c463587..70819be5af5b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -23,7 +23,7 @@ import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.{CodeGenContext, GeneratedExpressionCode}
-import org.apache.spark.sql.catalyst.util.TypeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData, TypeUtils}
 import org.apache.spark.sql.types._
 import org.apache.spark.util.collection.OpenHashSet
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index a4ec5085fa15..f0f7a6cf0cc4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -27,6 +27,7 @@ import org.codehaus.janino.ClassBodyEvaluator
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.types._
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index ee50587ed097..f0ed8645d923 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.catalyst.expressions.codegen
 
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.NoOp
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData}
 import org.apache.spark.sql.types._
 
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
index 75c66bc271fe..89d87726ac64 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
@@ -20,6 +20,7 @@ import java.util.Comparator
 
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.{CodeGenContext, CodegenFallback, GeneratedExpressionCode}
+import org.apache.spark.sql.catalyst.util.{MapData, GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
index 059e45bd684e..1854dfaa7db3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
@@ -21,7 +21,7 @@ import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen._
-import org.apache.spark.sql.catalyst.util.TypeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, TypeUtils}
 import org.apache.spark.sql.types._
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
index a2b5a6a58090..41cd0a104a1f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
@@ -21,6 +21,7 @@ import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
+import org.apache.spark.sql.catalyst.util.{MapData, GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
index c0845e1a0102..1a2092c909c5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayData}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index b42d6c5c1e14..81855289762c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.catalyst.expressions
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 
 import scala.language.existentials
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
index 64f15945c790..9e484c5ed83b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala
@@ -22,7 +22,7 @@ import java.util.regex.{MatchResult, Pattern}
 import org.apache.commons.lang3.StringEscapeUtils
 
 import org.apache.spark.sql.catalyst.expressions.codegen._
-import org.apache.spark.sql.catalyst.util.StringUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, StringUtils}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala
index 017efd2a166a..cfc68fc00bea 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/rows.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
index abc5c94589ba..8770c4b76c2e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
@@ -22,6 +22,7 @@ import java.util.{HashMap, Locale, Map => JMap}
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen._
+import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.{ByteArray, UTF8String}
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/AbstractScalaRowIterator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/AbstractScalaRowIterator.scala
similarity index 96%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/AbstractScalaRowIterator.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/AbstractScalaRowIterator.scala
index 1090bdb5a4bd..6d35f140cf23 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/AbstractScalaRowIterator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/AbstractScalaRowIterator.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql
+package org.apache.spark.sql.catalyst.util
 
 /**
  * Shim to allow us to implement [[scala.Iterator]] in Java. Scala 2.11+ has an AbstractIterator
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapData.scala
similarity index 96%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapData.scala
index e5ffe3221735..70b028d2b3f7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayBasedMapData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayBasedMapData.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
 
 class ArrayBasedMapData(val keyArray: ArrayData, val valueArray: ArrayData) extends MapData {
   require(keyArray.numElements() == valueArray.numElements())
@@ -42,7 +42,7 @@ class ArrayBasedMapData(val keyArray: ArrayData, val valueArray: ArrayData) exte
     ArrayBasedMapData.toScalaMap(this).hashCode()
   }
 
-  override def toString(): String = {
+  override def toString: String = {
     s"keys: $keyArray, values: $valueArray"
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayData.scala
similarity index 97%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayData.scala
index b4ea300f5f30..cad4a08b0d83 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ArrayData.scala
@@ -15,11 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
 
 import scala.reflect.ClassTag
 
 import org.apache.spark.sql.catalyst.expressions.SpecializedGetters
+import org.apache.spark.sql.types.DataType
 
 abstract class ArrayData extends SpecializedGetters with Serializable {
   def numElements(): Int
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/DataTypeParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
similarity index 98%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/DataTypeParser.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
index 6e081ea9237b..2b83651f9086 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/DataTypeParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
@@ -15,13 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
 
 import scala.language.implicitConversions
 import scala.util.matching.Regex
 import scala.util.parsing.combinator.syntactical.StandardTokenParsers
 
 import org.apache.spark.sql.catalyst.SqlLexical
+import org.apache.spark.sql.types._
 
 /**
  * This is a data type parser that can be used to parse string representations of data types
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
similarity index 98%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
index 9448d88d6c5f..e9bf7b33e35b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/GenericArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
@@ -15,9 +15,10 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
 
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.types.{DataType, Decimal}
 import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
 class GenericArrayData(val array: Array[Any]) extends ArrayData {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/MapData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/MapData.scala
similarity index 93%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/types/MapData.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/MapData.scala
index f50969f0f0b7..40db6067adf7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/MapData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/MapData.scala
@@ -15,7 +15,9 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
+
+import org.apache.spark.sql.types.DataType
 
 abstract class MapData extends Serializable {
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
index d6b436724b2a..11fce4beaf55 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
@@ -18,13 +18,13 @@
 package org.apache.spark.sql.types
 
 import scala.collection.mutable.ArrayBuffer
-import scala.math.max
 
 import org.json4s.JsonDSL._
 
 import org.apache.spark.SparkException
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference, InterpretedOrdering}
+import org.apache.spark.sql.catalyst.util.DataTypeParser
 
 
 /**
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
index 7735acbcbad4..008d0bea8a94 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -17,15 +17,13 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-import java.util
-
-import org.apache.spark.sql.types.{StructField, ArrayType, ArrayData}
-
 import scala.collection.mutable.ArrayBuffer
 import scala.reflect.runtime.universe._
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst._
+import org.apache.spark.sql.catalyst.util.ArrayData
+import org.apache.spark.sql.types.{StructField, ArrayType}
 
 case class RepeatedStruct(s: Seq[PrimitiveData])
 
@@ -166,43 +164,43 @@ class ProductEncoderSuite extends SparkFunSuite {
     null: Array[Byte]))
   encodeDecodeTestCustom(("Array[Byte]",
     Array[Byte](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Int] null",
     null: Array[Int]))
   encodeDecodeTestCustom(("Array[Int]",
     Array[Int](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Long] null",
     null: Array[Long]))
   encodeDecodeTestCustom(("Array[Long]",
     Array[Long](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Double] null",
     null: Array[Double]))
   encodeDecodeTestCustom(("Array[Double]",
     Array[Double](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Float] null",
     null: Array[Float]))
   encodeDecodeTestCustom(("Array[Float]",
     Array[Float](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Boolean] null",
     null: Array[Boolean]))
   encodeDecodeTestCustom(("Array[Boolean]",
     Array[Boolean](true, false)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTest(("Array[Short] null",
     null: Array[Short]))
   encodeDecodeTestCustom(("Array[Short]",
     Array[Short](1, 2, 3)))
-    { (l, r) => util.Arrays.equals(l._2, r._2) }
+    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
 
   encodeDecodeTestCustom(("java.sql.Timestamp",
     new java.sql.Timestamp(1)))
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
index c6aad34e972b..68545f33e546 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/UnsafeRowConverterSuite.scala
@@ -23,7 +23,7 @@ import org.scalatest.Matchers
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.array.ByteArrayMethods
 import org.apache.spark.unsafe.types.UTF8String
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
index 098944a9f4fc..5adcac39c651 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.catalyst.expressions.codegen
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/DataTypeParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
similarity index 98%
rename from sql/catalyst/src/test/scala/org/apache/spark/sql/types/DataTypeParserSuite.scala
rename to sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
index 1ba290753ce4..1e3409a9db6e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/DataTypeParserSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
@@ -15,9 +15,10 @@
 * limitations under the License.
 */
 
-package org.apache.spark.sql.types
+package org.apache.spark.sql.catalyst.util
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.types._
 
 class DataTypeParserSuite extends SparkFunSuite {
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/types/DecimalSuite.scala
similarity index 99%
rename from sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
rename to sql/catalyst/src/test/scala/org/apache/spark/sql/types/DecimalSuite.scala
index f9aceb8d3b13..50683947da22 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/types/decimal/DecimalSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/types/DecimalSuite.scala
@@ -15,10 +15,9 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.types.decimal
+package org.apache.spark.sql.types
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.types.Decimal
 import org.scalatest.PrivateMethodTester
 
 import scala.language.postfixOps
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index de11a1699afd..e4f4cf1533ac 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -17,15 +17,15 @@
 
 package org.apache.spark.sql
 
-
 import scala.language.implicitConversions
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.Logging
 import org.apache.spark.sql.functions.lit
+import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.analysis._
+import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
 
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
index 446739d5b8a2..6969b423d01b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DDLParser.scala
@@ -25,6 +25,7 @@ import org.apache.spark.sql.SaveMode
 import org.apache.spark.sql.catalyst.{TableIdentifier, AbstractSparkSQLParser}
 import org.apache.spark.sql.catalyst.analysis.UnresolvedRelation
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
+import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
 
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
index d7d6edeb6c6d..3f34520afe6b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonGenerator.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.execution.datasources.json
 
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayData, DateTimeUtils}
 
 import scala.collection.Map
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
index 09b8a9e936a1..b2e52011a727 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
@@ -26,7 +26,7 @@ import scala.collection.mutable.ArrayBuffer
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.execution.datasources.json.JacksonUtils.nextUntil
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index 49007e45ecf8..b16c46579f7c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -32,7 +32,7 @@ import org.apache.parquet.schema.{GroupType, MessageType, PrimitiveType, Type}
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData, DateTimeUtils}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
index d4e6980967e8..d611b0011da1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/python.scala
@@ -24,6 +24,7 @@ import scala.collection.JavaConverters._
 
 import net.razorvine.pickle._
 
+import org.apache.spark.{Logging => SparkLogging, TaskContext, Accumulator}
 import org.apache.spark.api.python.{PythonRunner, PythonBroadcast, PythonRDD, SerDeUtil}
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.RDD
@@ -33,9 +34,9 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.rules.Rule
+import org.apache.spark.sql.catalyst.util.{MapData, GenericArrayData, ArrayBasedMapData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.{Logging => SparkLogging, TaskContext, Accumulator}
 
 /**
  * A serialized version of a Python lambda function.  Suitable for use in a [[PythonRDD]].
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
index a741a45f1c52..8d4854b698ed 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/test/ExamplePointUDT.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.test
 
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 
 /**
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
index 7d1ee39d4b53..00f1526576cc 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UnsafeRowSuite.scala
@@ -20,9 +20,10 @@ package org.apache.spark.sql
 import java.io.ByteArrayOutputStream
 
 import org.apache.spark.{SparkConf, SparkFunSuite}
-import org.apache.spark.serializer.{KryoSerializer, JavaSerializer}
+import org.apache.spark.serializer.{JavaSerializer, KryoSerializer}
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
+import org.apache.spark.sql.catalyst.expressions.{UnsafeProjection, UnsafeRow}
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.memory.MemoryAllocator
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
index d17671d48a2f..a229e5814df8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
+
 import scala.beans.{BeanInfo, BeanProperty}
 
 import com.clearspring.analytics.stream.cardinality.HyperLogLog
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
index 964cdb52b245..a5882f7870e3 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
@@ -22,7 +22,8 @@ import scala.util.Random
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{GenericInternalRow, GenericMutableRow}
-import org.apache.spark.sql.types.{ArrayBasedMapData, GenericArrayData, AtomicType, Decimal}
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData}
+import org.apache.spark.sql.types.{AtomicType, Decimal}
 import org.apache.spark.unsafe.types.UTF8String
 
 object ColumnarTestUtils {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
index 5dc37e5c3c23..b3fceeab64cf 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
@@ -21,8 +21,9 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{AttributeReference, Attribute, Literal, IsNull}
+import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.test.SharedSQLContext
-import org.apache.spark.sql.types.{GenericArrayData, ArrayType, StringType}
+import org.apache.spark.sql.types.{ArrayType, StringType}
 import org.apache.spark.unsafe.types.UTF8String
 
 class RowFormatConvertersSuite extends SparkPlanTest with SharedSQLContext {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
index 43c238fd49e0..36f0708f9da3 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
@@ -28,7 +28,7 @@ import org.apache.hadoop.{io => hadoopIo}
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.{AnalysisException, types}
 import org.apache.spark.unsafe.types.UTF8String
@@ -50,8 +50,8 @@ import org.apache.spark.unsafe.types.UTF8String
  *     java.sql.Date
  *     java.sql.Timestamp
  *  Complex Types =>
- *    Map: [[org.apache.spark.sql.types.MapData]]
- *    List: [[org.apache.spark.sql.types.ArrayData]]
+ *    Map: [[MapData]]
+ *    List: [[ArrayData]]
  *    Struct: [[org.apache.spark.sql.catalyst.InternalRow]]
  *    Union: NOT SUPPORTED YET
  *  The Complex types plays as a container, which can hold arbitrary data types.
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index 5819cb9d0877..fdb576bedbba 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -32,11 +32,12 @@ import org.apache.hadoop.hive.ql.plan.TableDesc
 
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.analysis.{Catalog, MultiInstanceRelation, OverrideCatalog}
+import org.apache.spark.sql.catalyst.{InternalRow, TableIdentifier}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules._
-import org.apache.spark.sql.catalyst.{InternalRow, TableIdentifier}
+import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation, Partition => ParquetPartition, PartitionSpec, ResolvedDataSource}
 import org.apache.spark.sql.execution.{FileRelation, datasources}
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index f57b20699939..2ccad474b4f7 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -41,6 +41,7 @@ import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules.Rule
+import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.hive.HiveShim._
 import org.apache.spark.sql.types._
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveInspectorSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveInspectorSuite.scala
index 81a70b8d4226..8bb9058cd74e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveInspectorSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveInspectorSuite.scala
@@ -30,6 +30,7 @@ import org.apache.hadoop.io.LongWritable
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.Literal
+import org.apache.spark.sql.catalyst.util.{MapData, GenericArrayData, ArrayBasedMapData}
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.Row
 

From 16dc9f344c08deee104090106cb0a537a90e33fc Mon Sep 17 00:00:00 2001
From: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>
Date: Fri, 23 Oct 2015 01:10:46 -0700
Subject: [PATCH 341/896] Fix typo "Received" to "Receiver" in
 streaming-kafka-integration.md

Removed typo on line 8 in markdown : "Received" -> "Receiver"

Author: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>

Closes #9242 from RohanBhanderi/patch-1.
---
 docs/streaming-kafka-integration.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/streaming-kafka-integration.md b/docs/streaming-kafka-integration.md
index 5db39ae54a27..ab7f0117c0b7 100644
--- a/docs/streaming-kafka-integration.md
+++ b/docs/streaming-kafka-integration.md
@@ -5,7 +5,7 @@ title: Spark Streaming + Kafka Integration Guide
 [Apache Kafka](http://kafka.apache.org/) is publish-subscribe messaging rethought as a distributed, partitioned, replicated commit log service. Here we explain how to configure Spark Streaming to receive data from Kafka. There are two approaches to this - the old approach using Receivers and Kafka's high-level API, and a new experimental approach (introduced in Spark 1.3) without using Receivers. They have different programming models, performance characteristics, and semantics guarantees, so read on for more details.
 
 ## Approach 1: Receiver-based Approach
-This approach uses a Receiver to receive the data. The Received is implemented using the Kafka high-level consumer API. As with all receivers, the data received from Kafka through a Receiver is stored in Spark executors, and then jobs launched by Spark Streaming processes the data. 
+This approach uses a Receiver to receive the data. The Receiver is implemented using the Kafka high-level consumer API. As with all receivers, the data received from Kafka through a Receiver is stored in Spark executors, and then jobs launched by Spark Streaming processes the data. 
 
 However, under default configuration, this approach can lose data under failures (see [receiver reliability](streaming-programming-guide.html#receiver-reliability). To ensure zero-data loss, you have to additionally enable Write Ahead Logs in Spark Streaming (introduced in Spark 1.2). This synchronously saves all the received Kafka data into write ahead logs on a distributed file system (e.g HDFS), so that all the data can be recovered on failure. See [Deploying section](streaming-programming-guide.html#deploying-applications) in the streaming programming guide for more details on Write Ahead Logs.
 

From 487d409e71767c76399217a07af8de1bb0da7aa8 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Fri, 23 Oct 2015 01:33:14 -0700
Subject: [PATCH 342/896] [SPARK-11243][SQL] zero out padding bytes in
 UnsafeRow

For nested StructType, the underline buffer could be used for others before, we should zero out the padding bytes for those primitive types that have less than 8 bytes.

cc cloud-fan

Author: Davies Liu <davies@databricks.com>

Closes #9217 from davies/zero_out.
---
 .../expressions/codegen/UnsafeRowWriter.java  | 20 ++++++++++++++-----
 .../codegen/GeneratedProjectionSuite.scala    | 20 +++++++++++++++++++
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
index adbe2621870d..048b7749d8fb 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
@@ -100,19 +100,27 @@ public void alignToWords(int numBytes) {
   }
 
   public void write(int ordinal, boolean value) {
-    Platform.putBoolean(holder.buffer, getFieldOffset(ordinal), value);
+    final long offset = getFieldOffset(ordinal);
+    Platform.putLong(holder.buffer, offset, 0L);
+    Platform.putBoolean(holder.buffer, offset, value);
   }
 
   public void write(int ordinal, byte value) {
-    Platform.putByte(holder.buffer, getFieldOffset(ordinal), value);
+    final long offset = getFieldOffset(ordinal);
+    Platform.putLong(holder.buffer, offset, 0L);
+    Platform.putByte(holder.buffer, offset, value);
   }
 
   public void write(int ordinal, short value) {
-    Platform.putShort(holder.buffer, getFieldOffset(ordinal), value);
+    final long offset = getFieldOffset(ordinal);
+    Platform.putLong(holder.buffer, offset, 0L);
+    Platform.putShort(holder.buffer, offset, value);
   }
 
   public void write(int ordinal, int value) {
-    Platform.putInt(holder.buffer, getFieldOffset(ordinal), value);
+    final long offset = getFieldOffset(ordinal);
+    Platform.putLong(holder.buffer, offset, 0L);
+    Platform.putInt(holder.buffer, offset, value);
   }
 
   public void write(int ordinal, long value) {
@@ -123,7 +131,9 @@ public void write(int ordinal, float value) {
     if (Float.isNaN(value)) {
       value = Float.NaN;
     }
-    Platform.putFloat(holder.buffer, getFieldOffset(ordinal), value);
+    final long offset = getFieldOffset(ordinal);
+    Platform.putLong(holder.buffer, offset, 0L);
+    Platform.putFloat(holder.buffer, offset, value);
   }
 
   public void write(int ordinal, double value) {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
index 5adcac39c651..1522ee34e43a 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratedProjectionSuite.scala
@@ -99,4 +99,24 @@ class GeneratedProjectionSuite extends SparkFunSuite {
     val row2 = safeProj(unsafeRow)
     assert(row2 === row)
   }
+
+  test("padding bytes should be zeroed out") {
+    val types = Seq(BooleanType, ByteType, ShortType, IntegerType, FloatType, BinaryType,
+      StringType)
+    val struct = StructType(types.map(StructField("", _, true)))
+    val fields = Array[DataType](StringType, struct)
+    val unsafeProj = UnsafeProjection.create(fields)
+
+    val innerRow = InternalRow(false, 1.toByte, 2.toShort, 3, 4.0f, "".getBytes,
+      UTF8String.fromString(""))
+    val row1 = InternalRow(UTF8String.fromString(""), innerRow)
+    val unsafe1 = unsafeProj(row1).copy()
+    // create a Row with long String before the inner struct
+    val row2 = InternalRow(UTF8String.fromString("a_long_string").repeat(10), innerRow)
+    val unsafe2 = unsafeProj(row2).copy()
+    assert(unsafe1.getStruct(1, 7) === unsafe2.getStruct(1, 7))
+    val unsafe3 = unsafeProj(row1).copy()
+    assert(unsafe1 === unsafe3)
+    assert(unsafe1.getStruct(1, 7) === unsafe3.getStruct(1, 7))
+  }
 }

From 03ccb22080965d44fc0e1fc94dc75a96bfa26b8a Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Fri, 23 Oct 2015 08:31:01 -0700
Subject: [PATCH 343/896] [SPARK-10382] Make example code in user guide
 testable

A POC code for making example code in user guide testable.

mengxr We still need to talk about the labels in code.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9109 from yinxusen/SPARK-10382.
---
 docs/_plugins/include_example.rb | 96 ++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 docs/_plugins/include_example.rb

diff --git a/docs/_plugins/include_example.rb b/docs/_plugins/include_example.rb
new file mode 100644
index 000000000000..0f4184c7462b
--- /dev/null
+++ b/docs/_plugins/include_example.rb
@@ -0,0 +1,96 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require 'liquid'
+require 'pygments'
+
+module Jekyll
+  class IncludeExampleTag < Liquid::Tag
+    
+    def initialize(tag_name, markup, tokens)
+      @markup = markup
+      super
+    end
+ 
+    def render(context)
+      site = context.registers[:site]
+      config_dir = (site.config['code_dir'] || '../examples/src/main').sub(/^\//,'')
+      @code_dir = File.join(site.source, config_dir)
+
+      clean_markup = @markup.strip
+      @file = File.join(@code_dir, clean_markup)
+      @lang = clean_markup.split('.').last
+
+      code = File.open(@file).read.encode("UTF-8")
+      code = select_lines(code)
+ 
+      Pygments.highlight(code, :lexer => @lang)
+    end
+ 
+    # Trim the code block so as to have the same indention, regardless of their positions in the
+    # code file.
+    def trim_codeblock(lines)
+      # Select the minimum indention of the current code block.
+      min_start_spaces = lines
+        .select { |l| l.strip.size !=0 }
+        .map { |l| l[/\A */].size }
+        .min
+
+      lines.map { |l| l[min_start_spaces .. -1] }
+    end
+
+    # Select lines according to labels in code. Currently we use "$example on$" and "$example off$"
+    # as labels. Note that code blocks identified by the labels should not overlap.
+    def select_lines(code)
+      lines = code.each_line.to_a
+
+      # Select the array of start labels from code.
+      startIndices = lines
+        .each_with_index
+        .select { |l, i| l.include? "$example on$" }
+        .map { |l, i| i }
+
+      # Select the array of end labels from code.
+      endIndices = lines
+        .each_with_index
+        .select { |l, i| l.include? "$example off$" }
+        .map { |l, i| i }
+
+      raise "Start indices amount is not equal to end indices amount, please check the code." \
+        unless startIndices.size == endIndices.size
+
+      raise "No code is selected by include_example, please check the code." \
+        if startIndices.size == 0
+
+      # Select and join code blocks together, with a space line between each of two continuous
+      # blocks.
+      lastIndex = -1
+      result = ""
+      startIndices.zip(endIndices).each do |start, endline|
+        raise "Overlapping between two example code blocks are not allowed." if start <= lastIndex
+        raise "$example on$ should not be in the same line with $example off$." if start == endline
+        lastIndex = endline
+        range = Range.new(start + 1, endline - 1)
+        result += trim_codeblock(lines[range]).join
+        result += "\n"
+      end
+      result
+    end
+  end
+end
+
+Liquid::Template.register_tag('include_example', Jekyll::IncludeExampleTag)

From 282a15f78e08f0dc9e696945be4fc973011a96d9 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Fri, 23 Oct 2015 08:43:49 -0700
Subject: [PATCH 344/896] [SPARK-10277] [MLLIB] [PYSPARK] Add @since annotation
 to pyspark.mllib.regression

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8684 from yu-iskw/SPARK-10277.
---
 python/pyspark/mllib/regression.py | 102 ++++++++++++++++++++++++++++-
 1 file changed, 101 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/mllib/regression.py b/python/pyspark/mllib/regression.py
index 961b5e80b013..6f00d1df209c 100644
--- a/python/pyspark/mllib/regression.py
+++ b/python/pyspark/mllib/regression.py
@@ -18,7 +18,7 @@
 import numpy as np
 from numpy import array
 
-from pyspark import RDD
+from pyspark import RDD, since
 from pyspark.streaming.dstream import DStream
 from pyspark.mllib.common import callMLlibFunc, _py2java, _java2py, inherit_doc
 from pyspark.mllib.linalg import SparseVector, Vectors, _convert_to_vector
@@ -43,6 +43,8 @@ class LabeledPoint(object):
             column matrix)
 
     Note: 'label' and 'features' are accessible as class attributes.
+
+    .. versionadded:: 1.0.0
     """
 
     def __init__(self, label, features):
@@ -66,6 +68,8 @@ class LinearModel(object):
 
     :param weights: Weights computed for every feature.
     :param intercept: Intercept computed for this model.
+
+    .. versionadded:: 0.9.0
     """
 
     def __init__(self, weights, intercept):
@@ -73,11 +77,15 @@ def __init__(self, weights, intercept):
         self._intercept = float(intercept)
 
     @property
+    @since("1.0.0")
     def weights(self):
+        """Weights computed for every feature."""
         return self._coeff
 
     @property
+    @since("1.0.0")
     def intercept(self):
+        """Intercept computed for this model."""
         return self._intercept
 
     def __repr__(self):
@@ -94,8 +102,11 @@ class LinearRegressionModelBase(LinearModel):
     True
     >>> abs(lrmb.predict(SparseVector(2, {0: -1.03, 1: 7.777})) - 14.624) < 1e-6
     True
+
+    .. versionadded:: 0.9.0
     """
 
+    @since("0.9.0")
     def predict(self, x):
         """
         Predict the value of the dependent variable given a vector or
@@ -163,14 +174,20 @@ class LinearRegressionModel(LinearRegressionModelBase):
     True
     >>> abs(lrm.predict(SparseVector(1, {0: 1.0})) - 1) < 0.5
     True
+
+    .. versionadded:: 0.9.0
     """
+    @since("1.4.0")
     def save(self, sc, path):
+        """Save a LinearRegressionModel."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.LinearRegressionModel(
             _py2java(sc, self._coeff), self.intercept)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since("1.4.0")
     def load(cls, sc, path):
+        """Load a LinearRegressionModel."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.LinearRegressionModel.load(
             sc._jsc.sc(), path)
         weights = _java2py(sc, java_model.weights())
@@ -199,8 +216,20 @@ def _regression_train_wrapper(train_func, modelClass, data, initial_weights):
 
 
 class LinearRegressionWithSGD(object):
+    """
+    Train a linear regression model with no regularization using Stochastic Gradient Descent.
+    This solves the least squares regression formulation
+                 f(weights) = 1/n ||A weights-y||^2^
+    (which is the mean squared error).
+    Here the data matrix has n rows, and the input RDD holds the set of rows of A, each with
+    its corresponding right hand side label y.
+    See also the documentation for the precise formulation.
+
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since("0.9.0")
     def train(cls, data, iterations=100, step=1.0, miniBatchFraction=1.0,
               initialWeights=None, regParam=0.0, regType=None, intercept=False,
               validateData=True, convergenceTol=0.001):
@@ -313,14 +342,20 @@ class LassoModel(LinearRegressionModelBase):
     True
     >>> abs(lrm.predict(SparseVector(1, {0: 1.0})) - 1) < 0.5
     True
+
+    .. versionadded:: 0.9.0
     """
+    @since("1.4.0")
     def save(self, sc, path):
+        """Save a LassoModel."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.LassoModel(
             _py2java(sc, self._coeff), self.intercept)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since("1.4.0")
     def load(cls, sc, path):
+        """Load a LassoModel."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.LassoModel.load(
             sc._jsc.sc(), path)
         weights = _java2py(sc, java_model.weights())
@@ -330,8 +365,19 @@ def load(cls, sc, path):
 
 
 class LassoWithSGD(object):
+    """
+    Train a regression model with L1-regularization using Stochastic Gradient Descent.
+    This solves the l1-regularized least squares regression formulation
+             f(weights) = 1/2n ||A weights-y||^2^  + regParam ||weights||_1
+    Here the data matrix has n rows, and the input RDD holds the set of rows of A, each with
+    its corresponding right hand side label y.
+    See also the documentation for the precise formulation.
+
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since("0.9.0")
     def train(cls, data, iterations=100, step=1.0, regParam=0.01,
               miniBatchFraction=1.0, initialWeights=None, intercept=False,
               validateData=True, convergenceTol=0.001):
@@ -434,14 +480,20 @@ class RidgeRegressionModel(LinearRegressionModelBase):
     True
     >>> abs(lrm.predict(SparseVector(1, {0: 1.0})) - 1) < 0.5
     True
+
+    .. versionadded:: 0.9.0
     """
+    @since("1.4.0")
     def save(self, sc, path):
+        """Save a RidgeRegressionMode."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.RidgeRegressionModel(
             _py2java(sc, self._coeff), self.intercept)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since("1.4.0")
     def load(cls, sc, path):
+        """Load a RidgeRegressionMode."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.RidgeRegressionModel.load(
             sc._jsc.sc(), path)
         weights = _java2py(sc, java_model.weights())
@@ -451,8 +503,19 @@ def load(cls, sc, path):
 
 
 class RidgeRegressionWithSGD(object):
+    """
+    Train a regression model with L2-regularization using Stochastic Gradient Descent.
+    This solves the l2-regularized least squares regression formulation
+             f(weights) = 1/2n ||A weights-y||^2^  + regParam/2 ||weights||^2^
+    Here the data matrix has n rows, and the input RDD holds the set of rows of A, each with
+    its corresponding right hand side label y.
+    See also the documentation for the precise formulation.
+
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since("0.9.0")
     def train(cls, data, iterations=100, step=1.0, regParam=0.01,
               miniBatchFraction=1.0, initialWeights=None, intercept=False,
               validateData=True, convergenceTol=0.001):
@@ -531,6 +594,8 @@ class IsotonicRegressionModel(Saveable, Loader):
     ...     rmtree(path)
     ... except OSError:
     ...     pass
+
+    .. versionadded:: 1.4.0
     """
 
     def __init__(self, boundaries, predictions, isotonic):
@@ -538,6 +603,7 @@ def __init__(self, boundaries, predictions, isotonic):
         self.predictions = predictions
         self.isotonic = isotonic
 
+    @since("1.4.0")
     def predict(self, x):
         """
         Predict labels for provided features.
@@ -562,7 +628,9 @@ def predict(self, x):
             return x.map(lambda v: self.predict(v))
         return np.interp(x, self.boundaries, self.predictions)
 
+    @since("1.4.0")
     def save(self, sc, path):
+        """Save a IsotonicRegressionModel."""
         java_boundaries = _py2java(sc, self.boundaries.tolist())
         java_predictions = _py2java(sc, self.predictions.tolist())
         java_model = sc._jvm.org.apache.spark.mllib.regression.IsotonicRegressionModel(
@@ -570,7 +638,9 @@ def save(self, sc, path):
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since("1.4.0")
     def load(cls, sc, path):
+        """Load a IsotonicRegressionModel."""
         java_model = sc._jvm.org.apache.spark.mllib.regression.IsotonicRegressionModel.load(
             sc._jsc.sc(), path)
         py_boundaries = _java2py(sc, java_model.boundaryVector()).toArray()
@@ -579,8 +649,29 @@ def load(cls, sc, path):
 
 
 class IsotonicRegression(object):
+    """
+    Isotonic regression.
+    Currently implemented using parallelized pool adjacent violators algorithm.
+    Only univariate (single feature) algorithm supported.
+
+    Sequential PAV implementation based on:
+    Tibshirani, Ryan J., Holger Hoefling, and Robert Tibshirani.
+      "Nearly-isotonic regression." Technometrics 53.1 (2011): 54-61.
+      Available from [[http://www.stat.cmu.edu/~ryantibs/papers/neariso.pdf]]
+
+    Sequential PAV parallelization based on:
+    Kearsley, Anthony J., Richard A. Tapia, and Michael W. Trosset.
+      "An approach to parallelizing isotonic regression."
+      Applied Mathematics and Parallel Computing. Physica-Verlag HD, 1996. 141-147.
+      Available from [[http://softlib.rice.edu/pub/CRPC-TRs/reports/CRPC-TR96640.pdf]]
+
+    @see [[http://en.wikipedia.org/wiki/Isotonic_regression Isotonic regression (Wikipedia)]]
+
+    .. versionadded:: 1.4.0
+    """
 
     @classmethod
+    @since("1.4.0")
     def train(cls, data, isotonic=True):
         """
         Train a isotonic regression model on the given data.
@@ -598,10 +689,13 @@ class StreamingLinearAlgorithm(object):
     Base class that has to be inherited by any StreamingLinearAlgorithm.
 
     Prevents reimplementation of methods predictOn and predictOnValues.
+
+    .. versionadded:: 1.5.0
     """
     def __init__(self, model):
         self._model = model
 
+    @since("1.5.0")
     def latestModel(self):
         """
         Returns the latest model.
@@ -616,6 +710,7 @@ def _validate(self, dstream):
             raise ValueError(
                 "Model must be intialized using setInitialWeights")
 
+    @since("1.5.0")
     def predictOn(self, dstream):
         """
         Make predictions on a dstream.
@@ -625,6 +720,7 @@ def predictOn(self, dstream):
         self._validate(dstream)
         return dstream.map(lambda x: self._model.predict(x))
 
+    @since("1.5.0")
     def predictOnValues(self, dstream):
         """
         Make predictions on a keyed dstream.
@@ -649,6 +745,8 @@ class StreamingLinearRegressionWithSGD(StreamingLinearAlgorithm):
     :param miniBatchFraction: Fraction of data on which SGD is run for each
                               iteration.
     :param convergenceTol: A condition which decides iteration termination.
+
+    .. versionadded:: 1.5.0
     """
     def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, convergenceTol=0.001):
         self.stepSize = stepSize
@@ -659,6 +757,7 @@ def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, conver
         super(StreamingLinearRegressionWithSGD, self).__init__(
             model=self._model)
 
+    @since("1.5.0")
     def setInitialWeights(self, initialWeights):
         """
         Set the initial value of weights.
@@ -669,6 +768,7 @@ def setInitialWeights(self, initialWeights):
         self._model = LinearRegressionModel(initialWeights, 0)
         return self
 
+    @since("1.5.0")
     def trainOn(self, dstream):
         """Train the model on the incoming dstream."""
         self._validate(dstream)

From 4e38defae13b2b13e196b4d172722ef5e6266c66 Mon Sep 17 00:00:00 2001
From: Jayant Shekar <jayant@user-MBPMBA-3.local>
Date: Fri, 23 Oct 2015 08:45:13 -0700
Subject: [PATCH 345/896] [SPARK-6723] [MLLIB] Model import/export for
 ChiSqSelector

This is a PR for Parquet-based model import/export.

* Added save/load for ChiSqSelectorModel
* Updated the test suite ChiSqSelectorSuite

Author: Jayant Shekar <jayant@user-MBPMBA-3.local>

Closes #6785 from jayantshekhar/SPARK-6723.
---
 .../spark/mllib/feature/ChiSqSelector.scala   | 70 ++++++++++++++++++-
 .../mllib/feature/ChiSqSelectorSuite.scala    | 26 +++++++
 2 files changed, 95 insertions(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
index b1524cf37780..5246faf22191 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
@@ -19,11 +19,18 @@ package org.apache.spark.mllib.feature
 
 import scala.collection.mutable.ArrayBuilder
 
+import org.json4s._
+import org.json4s.JsonDSL._
+import org.json4s.jackson.JsonMethods._
+
 import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.stat.Statistics
+import org.apache.spark.mllib.util.{Loader, Saveable}
 import org.apache.spark.rdd.RDD
+import org.apache.spark.SparkContext
+import org.apache.spark.sql.{SQLContext, Row}
 
 /**
  * :: Experimental ::
@@ -34,7 +41,7 @@ import org.apache.spark.rdd.RDD
 @Since("1.3.0")
 @Experimental
 class ChiSqSelectorModel @Since("1.3.0") (
-  @Since("1.3.0") val selectedFeatures: Array[Int]) extends VectorTransformer {
+  @Since("1.3.0") val selectedFeatures: Array[Int]) extends VectorTransformer with Saveable {
 
   require(isSorted(selectedFeatures), "Array has to be sorted asc")
 
@@ -102,6 +109,67 @@ class ChiSqSelectorModel @Since("1.3.0") (
           s"Only sparse and dense vectors are supported but got ${other.getClass}.")
     }
   }
+
+  @Since("1.6.0")
+  override def save(sc: SparkContext, path: String): Unit = {
+    ChiSqSelectorModel.SaveLoadV1_0.save(sc, this, path)
+  }
+
+  override protected def formatVersion: String = "1.0"
+}
+
+object ChiSqSelectorModel extends Loader[ChiSqSelectorModel] {
+  @Since("1.6.0")
+  override def load(sc: SparkContext, path: String): ChiSqSelectorModel = {
+    ChiSqSelectorModel.SaveLoadV1_0.load(sc, path)
+  }
+
+  private[feature]
+  object SaveLoadV1_0 {
+
+    private val thisFormatVersion = "1.0"
+
+    /** Model data for import/export */
+    case class Data(feature: Int)
+
+    private[feature]
+    val thisClassName = "org.apache.spark.mllib.feature.ChiSqSelectorModel"
+
+    def save(sc: SparkContext, model: ChiSqSelectorModel, path: String): Unit = {
+      val sqlContext = new SQLContext(sc)
+      import sqlContext.implicits._
+      val metadata = compact(render(
+        ("class" -> thisClassName) ~ ("version" -> thisFormatVersion)))
+      sc.parallelize(Seq(metadata), 1).saveAsTextFile(Loader.metadataPath(path))
+
+      // Create Parquet data.
+      val dataArray = Array.tabulate(model.selectedFeatures.length) { i =>
+        Data(model.selectedFeatures(i))
+      }
+      sc.parallelize(dataArray, 1).toDF().write.parquet(Loader.dataPath(path))
+
+    }
+
+    def load(sc: SparkContext, path: String): ChiSqSelectorModel = {
+      implicit val formats = DefaultFormats
+      val sqlContext = new SQLContext(sc)
+      val (className, formatVersion, metadata) = Loader.loadMetadata(sc, path)
+      assert(className == thisClassName)
+      assert(formatVersion == thisFormatVersion)
+
+      val dataFrame = sqlContext.read.parquet(Loader.dataPath(path))
+      val dataArray = dataFrame.select("feature")
+
+      // Check schema explicitly since erasure makes it hard to use match-case for checking.
+      Loader.checkSchema[Data](dataFrame.schema)
+
+      val features = dataArray.map {
+        case Row(feature: Int) => (feature)
+      }.collect()
+
+      return new ChiSqSelectorModel(features)
+    }
+  }
 }
 
 /**
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/feature/ChiSqSelectorSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/feature/ChiSqSelectorSuite.scala
index 889727fb5582..734800a9afad 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/feature/ChiSqSelectorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/feature/ChiSqSelectorSuite.scala
@@ -21,6 +21,7 @@ import org.apache.spark.SparkFunSuite
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.util.Utils
 
 class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext {
 
@@ -63,4 +64,29 @@ class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext {
     }.collect().toSet
     assert(filteredData == preFilteredData)
   }
+
+  test("model load / save") {
+    val model = ChiSqSelectorSuite.createModel()
+    val tempDir = Utils.createTempDir()
+    val path = tempDir.toURI.toString
+    try {
+      model.save(sc, path)
+      val sameModel = ChiSqSelectorModel.load(sc, path)
+      ChiSqSelectorSuite.checkEqual(model, sameModel)
+    } finally {
+      Utils.deleteRecursively(tempDir)
+    }
+  }
+}
+
+object ChiSqSelectorSuite extends SparkFunSuite {
+
+  def createModel(): ChiSqSelectorModel = {
+    val arr = Array(1, 2, 3, 4)
+    new ChiSqSelectorModel(arr)
+  }
+
+  def checkEqual(a: ChiSqSelectorModel, b: ChiSqSelectorModel): Unit = {
+    assert(a.selectedFeatures.deep == b.selectedFeatures.deep)
+  }
 }

From e1a897b657eb62e837026f7b3efafb9a6424ec4f Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Fri, 23 Oct 2015 13:04:06 -0700
Subject: [PATCH 346/896] [SPARK-11274] [SQL] Text data source support for
 Spark SQL.

This adds API for reading and writing text files, similar to SparkContext.textFile and RDD.saveAsTextFile.
```
SQLContext.read.text("/path/to/something.txt")
DataFrame.write.text("/path/to/write.txt")
```

Using the new Dataset API, this also supports
```
val ds: Dataset[String] = SQLContext.read.text("/path/to/something.txt").as[String]
```

Author: Reynold Xin <rxin@databricks.com>

Closes #9240 from rxin/SPARK-11274.
---
 ...pache.spark.sql.sources.DataSourceRegister |   1 +
 .../apache/spark/sql/DataFrameReader.scala    |  16 ++
 .../apache/spark/sql/DataFrameWriter.scala    |  18 ++
 .../datasources/json/JSONRelation.scala       |   7 +-
 .../datasources/text/DefaultSource.scala      | 160 ++++++++++++++++++
 sql/core/src/test/resources/text-suite.txt    |   4 +
 .../datasources/text/TextSuite.scala          |  81 +++++++++
 7 files changed, 283 insertions(+), 4 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
 create mode 100644 sql/core/src/test/resources/text-suite.txt
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala

diff --git a/sql/core/src/main/resources/META-INF/services/org.apache.spark.sql.sources.DataSourceRegister b/sql/core/src/main/resources/META-INF/services/org.apache.spark.sql.sources.DataSourceRegister
index ca50000b4756..1ca2044057e5 100644
--- a/sql/core/src/main/resources/META-INF/services/org.apache.spark.sql.sources.DataSourceRegister
+++ b/sql/core/src/main/resources/META-INF/services/org.apache.spark.sql.sources.DataSourceRegister
@@ -1,3 +1,4 @@
 org.apache.spark.sql.execution.datasources.jdbc.DefaultSource
 org.apache.spark.sql.execution.datasources.json.DefaultSource
 org.apache.spark.sql.execution.datasources.parquet.DefaultSource
+org.apache.spark.sql.execution.datasources.text.DefaultSource
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index e8651a3569d6..824220d85e04 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -302,6 +302,22 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
     DataFrame(sqlContext, sqlContext.catalog.lookupRelation(TableIdentifier(tableName)))
   }
 
+  /**
+   * Loads a text file and returns a [[DataFrame]] with a single string column named "text".
+   * Each line in the text file is a new row in the resulting DataFrame. For example:
+   * {{{
+   *   // Scala:
+   *   sqlContext.read.text("/path/to/spark/README.md")
+   *
+   *   // Java:
+   *   sqlContext.read().text("/path/to/spark/README.md")
+   * }}}
+   *
+   * @param path input path
+   * @since 1.6.0
+   */
+  def text(path: String): DataFrame = format("text").load(path)
+
   ///////////////////////////////////////////////////////////////////////////////////////
   // Builder pattern config options
   ///////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
index 764510ab4b4b..7887e559a302 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
@@ -244,6 +244,8 @@ final class DataFrameWriter private[sql](df: DataFrame) {
    * @param connectionProperties JDBC database connection arguments, a list of arbitrary string
    *                             tag/value. Normally at least a "user" and "password" property
    *                             should be included.
+   *
+   * @since 1.4.0
    */
   def jdbc(url: String, table: String, connectionProperties: Properties): Unit = {
     val props = new Properties()
@@ -317,6 +319,22 @@ final class DataFrameWriter private[sql](df: DataFrame) {
    */
   def orc(path: String): Unit = format("orc").save(path)
 
+  /**
+   * Saves the content of the [[DataFrame]] in a text file at the specified path.
+   * The DataFrame must have only one column that is of string type.
+   * Each row becomes a new line in the output file. For example:
+   * {{{
+   *   // Scala:
+   *   df.write.text("/path/to/output")
+   *
+   *   // Java:
+   *   df.write().text("/path/to/output")
+   * }}}
+   *
+   * @since 1.6.0
+   */
+  def text(path: String): Unit = format("text").save(path)
+
   ///////////////////////////////////////////////////////////////////////////////////////
   // Builder pattern config options
   ///////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index d05e6efa83c8..794b889a9362 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -161,11 +161,10 @@ private[json] class JsonOutputWriter(
     context: TaskAttemptContext)
   extends OutputWriter with SparkHadoopMapRedUtil with Logging {
 
-  val writer = new CharArrayWriter()
+  private[this] val writer = new CharArrayWriter()
   // create the Generator without separator inserted between 2 records
-  val gen = new JsonFactory().createGenerator(writer).setRootValueSeparator(null)
-
-  val result = new Text()
+  private[this] val gen = new JsonFactory().createGenerator(writer).setRootValueSeparator(null)
+  private[this] val result = new Text()
 
   private val recordWriter: RecordWriter[NullWritable, Text] = {
     new TextOutputFormat[NullWritable, Text]() {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
new file mode 100644
index 000000000000..ab26c57ad192
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
@@ -0,0 +1,160 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.text
+
+import com.google.common.base.Objects
+import org.apache.hadoop.fs.{Path, FileStatus}
+import org.apache.hadoop.io.{NullWritable, Text, LongWritable}
+import org.apache.hadoop.mapred.{TextInputFormat, JobConf}
+import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat
+import org.apache.hadoop.mapreduce.{RecordWriter, TaskAttemptContext, Job}
+import org.apache.hadoop.mapreduce.lib.input.FileInputFormat
+
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.mapred.SparkHadoopMapRedUtil
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
+import org.apache.spark.sql.execution.datasources.PartitionSpec
+import org.apache.spark.sql.sources._
+import org.apache.spark.sql.types.{StringType, StructType}
+import org.apache.spark.unsafe.types.UTF8String
+
+/**
+ * A data source for reading text files.
+ */
+class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
+
+  override def createRelation(
+      sqlContext: SQLContext,
+      paths: Array[String],
+      dataSchema: Option[StructType],
+      partitionColumns: Option[StructType],
+      parameters: Map[String, String]): HadoopFsRelation = {
+    dataSchema.foreach(verifySchema)
+    new TextRelation(None, partitionColumns, paths)(sqlContext)
+  }
+
+  override def shortName(): String = "text"
+
+  private def verifySchema(schema: StructType): Unit = {
+    if (schema.size != 1) {
+      throw new AnalysisException(
+        s"Text data source supports only a single column, and you have ${schema.size} columns.")
+    }
+    val tpe = schema(0).dataType
+    if (tpe != StringType) {
+      throw new AnalysisException(
+        s"Text data source supports only a string column, but you have ${tpe.simpleString}.")
+    }
+  }
+}
+
+private[sql] class TextRelation(
+    val maybePartitionSpec: Option[PartitionSpec],
+    override val userDefinedPartitionColumns: Option[StructType],
+    override val paths: Array[String] = Array.empty[String])
+    (@transient val sqlContext: SQLContext)
+  extends HadoopFsRelation(maybePartitionSpec) {
+
+  /** Data schema is always a single column, named "text". */
+  override def dataSchema: StructType = new StructType().add("text", StringType)
+
+  /** This is an internal data source that outputs internal row format. */
+  override val needConversion: Boolean = false
+
+  /** Read path. */
+  override def buildScan(inputPaths: Array[FileStatus]): RDD[Row] = {
+    val job = new Job(sqlContext.sparkContext.hadoopConfiguration)
+    val conf = SparkHadoopUtil.get.getConfigurationFromJobContext(job)
+    val paths = inputPaths.map(_.getPath).sortBy(_.toUri)
+
+    if (paths.nonEmpty) {
+      FileInputFormat.setInputPaths(job, paths: _*)
+    }
+
+    sqlContext.sparkContext.hadoopRDD(
+      conf.asInstanceOf[JobConf], classOf[TextInputFormat], classOf[LongWritable], classOf[Text])
+      .mapPartitions { iter =>
+        var buffer = new Array[Byte](1024)
+        val row = new GenericMutableRow(1)
+        iter.map { case (_, line) =>
+          if (line.getLength > buffer.length) {
+            buffer = new Array[Byte](line.getLength)
+          }
+          System.arraycopy(line.getBytes, 0, buffer, 0, line.getLength)
+          row.update(0, UTF8String.fromBytes(buffer, 0, line.getLength))
+          row
+        }
+      }.asInstanceOf[RDD[Row]]
+  }
+
+  /** Write path. */
+  override def prepareJobForWrite(job: Job): OutputWriterFactory = {
+    new OutputWriterFactory {
+      override def newInstance(
+          path: String,
+          dataSchema: StructType,
+          context: TaskAttemptContext): OutputWriter = {
+        new TextOutputWriter(path, dataSchema, context)
+      }
+    }
+  }
+
+  override def equals(other: Any): Boolean = other match {
+    case that: TextRelation =>
+      paths.toSet == that.paths.toSet && partitionColumns == that.partitionColumns
+    case _ => false
+  }
+
+  override def hashCode(): Int = {
+    Objects.hashCode(paths.toSet, partitionColumns)
+  }
+}
+
+class TextOutputWriter(path: String, dataSchema: StructType, context: TaskAttemptContext)
+  extends OutputWriter
+  with SparkHadoopMapRedUtil {
+
+  private[this] val buffer = new Text()
+
+  private val recordWriter: RecordWriter[NullWritable, Text] = {
+    new TextOutputFormat[NullWritable, Text]() {
+      override def getDefaultWorkFile(context: TaskAttemptContext, extension: String): Path = {
+        val configuration = SparkHadoopUtil.get.getConfigurationFromJobContext(context)
+        val uniqueWriteJobId = configuration.get("spark.sql.sources.writeJobUUID")
+        val taskAttemptId = SparkHadoopUtil.get.getTaskAttemptIDFromTaskAttemptContext(context)
+        val split = taskAttemptId.getTaskID.getId
+        new Path(path, f"part-r-$split%05d-$uniqueWriteJobId$extension")
+      }
+    }.getRecordWriter(context)
+  }
+
+  override def write(row: Row): Unit = throw new UnsupportedOperationException("call writeInternal")
+
+  override protected[sql] def writeInternal(row: InternalRow): Unit = {
+    val utf8string = row.getUTF8String(0)
+    buffer.set(utf8string.getBytes)
+    recordWriter.write(NullWritable.get(), buffer)
+  }
+
+  override def close(): Unit = {
+    recordWriter.close(context)
+  }
+}
diff --git a/sql/core/src/test/resources/text-suite.txt b/sql/core/src/test/resources/text-suite.txt
new file mode 100644
index 000000000000..e8fd967197fe
--- /dev/null
+++ b/sql/core/src/test/resources/text-suite.txt
@@ -0,0 +1,4 @@
+This is a test file for the text data source
+1+1
+数据砖头
+"doh"
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala
new file mode 100644
index 000000000000..0a2306c06646
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.text
+
+import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.sql.types.{StringType, StructType}
+import org.apache.spark.sql.{AnalysisException, DataFrame, QueryTest, Row}
+import org.apache.spark.util.Utils
+
+
+class TextSuite extends QueryTest with SharedSQLContext {
+
+  test("reading text file") {
+    verifyFrame(sqlContext.read.format("text").load(testFile))
+  }
+
+  test("SQLContext.read.text() API") {
+    verifyFrame(sqlContext.read.text(testFile))
+  }
+
+  test("writing") {
+    val df = sqlContext.read.text(testFile)
+
+    val tempFile = Utils.createTempDir()
+    tempFile.delete()
+    df.write.text(tempFile.getCanonicalPath)
+    verifyFrame(sqlContext.read.text(tempFile.getCanonicalPath))
+
+    Utils.deleteRecursively(tempFile)
+  }
+
+  test("error handling for invalid schema") {
+    val tempFile = Utils.createTempDir()
+    tempFile.delete()
+
+    val df = sqlContext.range(2)
+    intercept[AnalysisException] {
+      df.write.text(tempFile.getCanonicalPath)
+    }
+
+    intercept[AnalysisException] {
+      sqlContext.range(2).select(df("id"), df("id") + 1).write.text(tempFile.getCanonicalPath)
+    }
+  }
+
+  private def testFile: String = {
+    Thread.currentThread().getContextClassLoader.getResource("text-suite.txt").toString
+  }
+
+  /** Verifies data and schema. */
+  private def verifyFrame(df: DataFrame): Unit = {
+    // schema
+    assert(df.schema == new StructType().add("text", StringType))
+
+    // verify content
+    val data = df.collect()
+    assert(data(0) == Row("This is a test file for the text data source"))
+    assert(data(1) == Row("1+1"))
+    // non ascii characters are not allowed in the code, so we disable the scalastyle here.
+    // scalastyle:off
+    assert(data(2) == Row("数据砖头"))
+    // scalastyle:on
+    assert(data(3) == Row("\"doh\""))
+    assert(data.length == 4)
+  }
+}

From 4725cb988b98f367c07214c4c3cfd1206fb2b5c2 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 23 Oct 2015 17:15:13 -0700
Subject: [PATCH 347/896] [SPARK-11194] [SQL] Use MutableURLClassLoader for the
 classLoader in IsolatedClientLoader.

https://issues.apache.org/jira/browse/SPARK-11194

Author: Yin Huai <yhuai@databricks.com>

Closes #9170 from yhuai/SPARK-11194.
---
 .../hive/client/IsolatedClientLoader.scala    | 79 ++++++++++++-------
 1 file changed, 51 insertions(+), 28 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
index 567e4d7b411e..f99c3ed2ae98 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
@@ -30,7 +30,7 @@ import org.apache.commons.io.{FileUtils, IOUtils}
 
 import org.apache.spark.Logging
 import org.apache.spark.deploy.SparkSubmitUtils
-import org.apache.spark.util.Utils
+import org.apache.spark.util.{MutableURLClassLoader, Utils}
 
 import org.apache.spark.sql.catalyst.util.quietly
 import org.apache.spark.sql.hive.HiveContext
@@ -148,39 +148,51 @@ private[hive] class IsolatedClientLoader(
   protected def classToPath(name: String): String =
     name.replaceAll("\\.", "/") + ".class"
 
-  /** The classloader that is used to load an isolated version of Hive. */
-  private[hive] var classLoader: ClassLoader = if (isolationOn) {
-    new URLClassLoader(allJars, rootClassLoader) {
-      override def loadClass(name: String, resolve: Boolean): Class[_] = {
-        val loaded = findLoadedClass(name)
-        if (loaded == null) doLoadClass(name, resolve) else loaded
-      }
-      def doLoadClass(name: String, resolve: Boolean): Class[_] = {
-        val classFileName = name.replaceAll("\\.", "/") + ".class"
-        if (isBarrierClass(name)) {
-          // For barrier classes, we construct a new copy of the class.
-          val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
-          logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
-          defineClass(name, bytes, 0, bytes.length)
-        } else if (!isSharedClass(name)) {
-          logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
-          super.loadClass(name, resolve)
-        } else {
-          // For shared classes, we delegate to baseClassLoader.
-          logDebug(s"shared class: $name")
-          baseClassLoader.loadClass(name)
+  /**
+   * The classloader that is used to load an isolated version of Hive.
+   * This classloader is a special URLClassLoader that exposes the addURL method.
+   * So, when we add jar, we can add this new jar directly through the addURL method
+   * instead of stacking a new URLClassLoader on top of it.
+   */
+  private[hive] val classLoader: MutableURLClassLoader = {
+    val isolatedClassLoader =
+      if (isolationOn) {
+        new URLClassLoader(allJars, rootClassLoader) {
+          override def loadClass(name: String, resolve: Boolean): Class[_] = {
+            val loaded = findLoadedClass(name)
+            if (loaded == null) doLoadClass(name, resolve) else loaded
+          }
+          def doLoadClass(name: String, resolve: Boolean): Class[_] = {
+            val classFileName = name.replaceAll("\\.", "/") + ".class"
+            if (isBarrierClass(name)) {
+              // For barrier classes, we construct a new copy of the class.
+              val bytes = IOUtils.toByteArray(baseClassLoader.getResourceAsStream(classFileName))
+              logDebug(s"custom defining: $name - ${util.Arrays.hashCode(bytes)}")
+              defineClass(name, bytes, 0, bytes.length)
+            } else if (!isSharedClass(name)) {
+              logDebug(s"hive class: $name - ${getResource(classToPath(name))}")
+              super.loadClass(name, resolve)
+            } else {
+              // For shared classes, we delegate to baseClassLoader.
+              logDebug(s"shared class: $name")
+              baseClassLoader.loadClass(name)
+            }
+          }
         }
+      } else {
+        baseClassLoader
       }
-    }
-  } else {
-    baseClassLoader
+    // Right now, we create a URLClassLoader that gives preference to isolatedClassLoader
+    // over its own URLs when it loads classes and resources.
+    // We may want to use ChildFirstURLClassLoader based on
+    // the configuration of spark.executor.userClassPathFirst, which gives preference
+    // to its own URLs over the parent class loader (see Executor's createClassLoader method).
+    new NonClosableMutableURLClassLoader(isolatedClassLoader)
   }
 
   private[hive] def addJar(path: String): Unit = synchronized {
     val jarURL = new java.io.File(path).toURI.toURL
-    // TODO: we should avoid of stacking classloaders (use a single URLClassLoader and add jars
-    // to that)
-    classLoader = new java.net.URLClassLoader(Array(jarURL), classLoader)
+    classLoader.addURL(jarURL)
   }
 
   /** The isolated client interface to Hive. */
@@ -221,3 +233,14 @@ private[hive] class IsolatedClientLoader(
    */
   private[hive] var cachedHive: Any = null
 }
+
+/**
+ * URL class loader that exposes the `addURL` and `getURLs` methods in URLClassLoader.
+ * This class loader cannot be closed (its `close` method is a no-op).
+ */
+private[sql] class NonClosableMutableURLClassLoader(
+    parent: ClassLoader)
+  extends MutableURLClassLoader(Array.empty, parent) {
+
+  override def close(): Unit = {}
+}

From 2462dbcce89d657bca17ae311c99c2a4bee4a5fa Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Fri, 23 Oct 2015 21:38:04 -0700
Subject: [PATCH 348/896] [SPARK-10971][SPARKR] RRunner should allow setting
 path to Rscript.

Add a new spark conf option "spark.sparkr.r.driver.command" to specify the executable for an R script in client modes.

The existing spark conf option "spark.sparkr.r.command" is used to specify the executable for an R script in cluster modes for both driver and workers. See also [launch R worker script](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/api/r/RRDD.scala#L395).

BTW, [envrionment variable "SPARKR_DRIVER_R"](https://github.com/apache/spark/blob/master/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java#L275) is used to locate R shell on the local host.

For your information, PYSPARK has two environment variables serving simliar purpose:
PYSPARK_PYTHON	      Python binary executable to use for PySpark in both driver and workers (default is `python`).
PYSPARK_DRIVER_PYTHON	Python binary executable to use for PySpark in driver only (default is PYSPARK_PYTHON).
pySpark use the code [here](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/PythonRunner.scala#L41) to determine the python executable for a python script.

Author: Sun Rui <rui.sun@intel.com>

Closes #9179 from sun-rui/SPARK-10971.
---
 .../org/apache/spark/deploy/RRunner.scala      | 11 ++++++++++-
 docs/configuration.md                          | 18 ++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
index 58cc1f9d963d..ed183cf16a9c 100644
--- a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
@@ -40,7 +40,16 @@ object RRunner {
 
     // Time to wait for SparkR backend to initialize in seconds
     val backendTimeout = sys.env.getOrElse("SPARKR_BACKEND_TIMEOUT", "120").toInt
-    val rCommand = "Rscript"
+    val rCommand = {
+      // "spark.sparkr.r.command" is deprecated and replaced by "spark.r.command",
+      // but kept here for backward compatibility.
+      var cmd = sys.props.getOrElse("spark.sparkr.r.command", "Rscript")
+      cmd = sys.props.getOrElse("spark.r.command", cmd)
+      if (sys.props.getOrElse("spark.submit.deployMode", "client") == "client") {
+        cmd = sys.props.getOrElse("spark.r.driver.command", cmd)
+      }
+      cmd
+    }
 
     // Check if the file path exists.
     // If not, change directory to current working directory for YARN cluster mode
diff --git a/docs/configuration.md b/docs/configuration.md
index be9c36bdfe3d..682384d4249e 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1589,6 +1589,20 @@ Apart from these, the following properties are also available, and may be useful
     Number of threads used by RBackend to handle RPC calls from SparkR package.
   </td>
 </tr>
+<tr>
+  <td><code>spark.r.command</code></td>
+  <td>Rscript</td>
+  <td>
+    Executable for executing R scripts in cluster modes for both driver and workers.
+  </td>
+</tr>
+<tr>
+  <td><code>spark.r.driver.command</code></td>
+  <td>spark.r.command</td>
+  <td>
+    Executable for executing R scripts in client modes for driver. Ignored in cluster modes.
+  </td>
+</tr>
 </table>
 
 #### Cluster Managers
@@ -1628,6 +1642,10 @@ The following variables can be set in `spark-env.sh`:
     <td><code>PYSPARK_DRIVER_PYTHON</code></td>
     <td>Python binary executable to use for PySpark in driver only (default is <code>PYSPARK_PYTHON</code>).</td>
   </tr>
+  <tr>
+    <td><code>SPARKR_DRIVER_R</code></td>
+    <td>R binary executable to use for SparkR shell (default is <code>R</code>).</td>
+  </tr>
   <tr>
     <td><code>SPARK_LOCAL_IP</code></td>
     <td>IP address of the machine to bind to.</td>

From 5e458125018029cef5cde3390f4a55dd4e164fde Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Fri, 23 Oct 2015 21:42:00 -0700
Subject: [PATCH 349/896] [SPARK-11294][SPARKR] Improve R doc for read.df,
 write.df, saveAsTable

Add examples for read.df, write.df; fix grouping for read.df, loadDF; fix formatting and text truncation for write.df, saveAsTable.

Several text issues:
![image](https://cloud.githubusercontent.com/assets/8969467/10708590/1303a44e-79c3-11e5-854f-3a2e16854cd7.png)
- text collapsed into a single paragraph
- text truncated at 2 places, eg. "overwrite: Existing data is expected to be overwritten by the contents of error:"

shivaram

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9261 from felixcheung/rdocreadwritedf.
---
 R/pkg/R/DataFrame.R  | 27 +++++++++++++--------------
 R/pkg/R/SQLContext.R | 16 +++++++++++-----
 2 files changed, 24 insertions(+), 19 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 993be82a47f7..2acbd081cd50 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1572,18 +1572,17 @@ setMethod("except",
 #' spark.sql.sources.default will be used.
 #'
 #' Additionally, mode is used to specify the behavior of the save operation when
-#' data already exists in the data source. There are four modes:
-#'  append: Contents of this DataFrame are expected to be appended to existing data.
-#'  overwrite: Existing data is expected to be overwritten by the contents of
-#     this DataFrame.
-#'  error: An exception is expected to be thrown.
+#' data already exists in the data source. There are four modes: \cr
+#'  append: Contents of this DataFrame are expected to be appended to existing data. \cr
+#'  overwrite: Existing data is expected to be overwritten by the contents of this DataFrame. \cr
+#'  error: An exception is expected to be thrown. \cr
 #'  ignore: The save operation is expected to not save the contents of the DataFrame
-#     and to not change the existing data.
+#'     and to not change the existing data. \cr
 #'
 #' @param df A SparkSQL DataFrame
 #' @param path A name for the table
 #' @param source A name for external data source
-#' @param mode One of 'append', 'overwrite', 'error', 'ignore'
+#' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
 #' @rdname write.df
 #' @name write.df
@@ -1596,6 +1595,7 @@ setMethod("except",
 #' path <- "path/to/file.json"
 #' df <- jsonFile(sqlContext, path)
 #' write.df(df, "myfile", "parquet", "overwrite")
+#' saveDF(df, parquetPath2, "parquet", mode = saveMode, mergeSchema = mergeSchema)
 #' }
 setMethod("write.df",
           signature(df = "DataFrame", path = "character"),
@@ -1637,18 +1637,17 @@ setMethod("saveDF",
 #' spark.sql.sources.default will be used.
 #'
 #' Additionally, mode is used to specify the behavior of the save operation when
-#' data already exists in the data source. There are four modes:
-#'  append: Contents of this DataFrame are expected to be appended to existing data.
-#'  overwrite: Existing data is expected to be overwritten by the contents of
-#     this DataFrame.
-#'  error: An exception is expected to be thrown.
+#' data already exists in the data source. There are four modes: \cr
+#'  append: Contents of this DataFrame are expected to be appended to existing data. \cr
+#'  overwrite: Existing data is expected to be overwritten by the contents of this DataFrame. \cr
+#'  error: An exception is expected to be thrown. \cr
 #'  ignore: The save operation is expected to not save the contents of the DataFrame
-#     and to not change the existing data.
+#'     and to not change the existing data. \cr
 #'
 #' @param df A SparkSQL DataFrame
 #' @param tableName A name for the table
 #' @param source A name for external data source
-#' @param mode One of 'append', 'overwrite', 'error', 'ignore'
+#' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
 #' @rdname saveAsTable
 #' @name saveAsTable
diff --git a/R/pkg/R/SQLContext.R b/R/pkg/R/SQLContext.R
index 399f53657a68..1bf025cce437 100644
--- a/R/pkg/R/SQLContext.R
+++ b/R/pkg/R/SQLContext.R
@@ -452,14 +452,21 @@ dropTempTable <- function(sqlContext, tableName) {
 #'
 #' @param sqlContext SQLContext to use
 #' @param path The path of files to load
-#' @param source the name of external data source
+#' @param source The name of external data source
+#' @param schema The data schema defined in structType
 #' @return DataFrame
+#' @rdname read.df
+#' @name read.df
 #' @export
 #' @examples
 #'\dontrun{
 #' sc <- sparkR.init()
 #' sqlContext <- sparkRSQL.init(sc)
-#' df <- read.df(sqlContext, "path/to/file.json", source = "json")
+#' df1 <- read.df(sqlContext, "path/to/file.json", source = "json")
+#' schema <- structType(structField("name", "string"),
+#'                      structField("info", "map<string,double>"))
+#' df2 <- read.df(sqlContext, mapTypeJsonPath, "json", schema)
+#' df3 <- loadDF(sqlContext, "data/test_table", "parquet", mergeSchema = "true")
 #' }
 
 read.df <- function(sqlContext, path = NULL, source = NULL, schema = NULL, ...) {
@@ -482,9 +489,8 @@ read.df <- function(sqlContext, path = NULL, source = NULL, schema = NULL, ...)
   dataFrame(sdf)
 }
 
-#' @aliases loadDF
-#' @export
-
+#' @rdname read.df
+#' @name loadDF
 loadDF <- function(sqlContext, path = NULL, source = NULL, schema = NULL, ...) {
   read.df(sqlContext, path, source, schema, ...)
 }

From ffed00493a0aa2373a04e3aa374404936fbe15c7 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Fri, 23 Oct 2015 22:56:55 -0700
Subject: [PATCH 350/896] =?UTF-8?q?[SPARK-11125]=20[SQL]=20Uninformative?=
 =?UTF-8?q?=20exception=20when=20running=20spark-sql=20witho=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…ut building with -Phive-thriftserver and SPARK_PREPEND_CLASSES is set

This is the exception after this patch. Please help review.
```
java.lang.NoClassDefFoundError: org/apache/hadoop/hive/cli/CliDriver
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:412)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:270)
	at org.apache.spark.util.Utils$.classForName(Utils.scala:173)
	at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:647)
	at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:180)
	at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:205)
	at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:120)
	at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hive.cli.CliDriver
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 21 more
Failed to load hive class.
You need to build Spark with -Phive and -Phive-thriftserver.
```

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9134 from zjffdu/SPARK-11125.
---
 .../main/scala/org/apache/spark/deploy/SparkSubmit.scala | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index ad92f5635af3..640cc325281a 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -655,6 +655,15 @@ object SparkSubmit {
           // scalastyle:on println
         }
         System.exit(CLASS_NOT_FOUND_EXIT_STATUS)
+      case e: NoClassDefFoundError =>
+        e.printStackTrace(printStream)
+        if (e.getMessage.contains("org/apache/hadoop/hive")) {
+          // scalastyle:off println
+          printStream.println(s"Failed to load hive class.")
+          printStream.println("You need to build Spark with -Phive and -Phive-thriftserver.")
+          // scalastyle:on println
+        }
+        System.exit(CLASS_NOT_FOUND_EXIT_STATUS)
     }
 
     // SPARK-4170

From e5bc8c27577f96c1ae5dc8cf9bf41cbe2877ffe3 Mon Sep 17 00:00:00 2001
From: dima <pronix.service@gmail.com>
Date: Sat, 24 Oct 2015 18:16:45 +0100
Subject: [PATCH 351/896] [SPARK-11245] update twitter4j to 4.0.4 version

update twitter4j to 4.0.4 version
https://issues.apache.org/jira/browse/SPARK-11245

Author: dima <pronix.service@gmail.com>

Closes #9221 from pronix/twitter4j_update.
---
 external/twitter/pom.xml                                        | 2 +-
 .../apache/spark/streaming/twitter/TwitterInputDStream.scala    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/external/twitter/pom.xml b/external/twitter/pom.xml
index 4c22ec8b3b15..087270de90b3 100644
--- a/external/twitter/pom.xml
+++ b/external/twitter/pom.xml
@@ -51,7 +51,7 @@
     <dependency>
       <groupId>org.twitter4j</groupId>
       <artifactId>twitter4j-stream</artifactId>
-      <version>3.0.3</version>
+      <version>4.0.4</version>
     </dependency>
     <dependency>
       <groupId>org.scalacheck</groupId>
diff --git a/external/twitter/src/main/scala/org/apache/spark/streaming/twitter/TwitterInputDStream.scala b/external/twitter/src/main/scala/org/apache/spark/streaming/twitter/TwitterInputDStream.scala
index d7de74b35054..9a85a6597c27 100644
--- a/external/twitter/src/main/scala/org/apache/spark/streaming/twitter/TwitterInputDStream.scala
+++ b/external/twitter/src/main/scala/org/apache/spark/streaming/twitter/TwitterInputDStream.scala
@@ -87,7 +87,7 @@ class TwitterReceiver(
 
       val query = new FilterQuery
       if (filters.size > 0) {
-        query.track(filters.toArray)
+        query.track(filters.mkString(","))
         newTwitterStream.filter(query)
       } else {
         newTwitterStream.sample()

From 28132ceb10d0c127495ce8cb36135e1cb54164d7 Mon Sep 17 00:00:00 2001
From: Jeffrey Naisbitt <jnaisbitt@familysearch.org>
Date: Sat, 24 Oct 2015 18:21:36 +0100
Subject: [PATCH 352/896] [SPARK-11264] bin/spark-class can't find assembly
 jars with certain GREP_OPTIONS set

Temporarily remove GREP_OPTIONS if set in bin/spark-class.

Some GREP_OPTIONS will modify the output of the grep commands that are looking for the assembly jars.
For example, if the -n option is specified, the grep output will look like:
5:spark-assembly-1.5.1-hadoop2.4.0.jar

This will not match the regular expressions, and so the jar files will not be found.  We could improve the regular expression to handle this case and trim off extra characters, but it is difficult to know which options may or may not be set.  Unsetting GREP_OPTIONS within the script handles all the cases and gives the desired output.

Author: Jeffrey Naisbitt <jnaisbitt@familysearch.org>

Closes #9231 from naisbitt/unset-GREP_OPTIONS.
---
 bin/spark-class | 1 +
 1 file changed, 1 insertion(+)

diff --git a/bin/spark-class b/bin/spark-class
index e38e08dec40e..8cae6ccbabe7 100755
--- a/bin/spark-class
+++ b/bin/spark-class
@@ -42,6 +42,7 @@ else
   ASSEMBLY_DIR="$SPARK_HOME/assembly/target/scala-$SPARK_SCALA_VERSION"
 fi
 
+GREP_OPTIONS=
 num_jars="$(ls -1 "$ASSEMBLY_DIR" | grep "^spark-assembly.*hadoop.*\.jar$" | wc -l)"
 if [ "$num_jars" -eq "0" -a -z "$SPARK_ASSEMBLY_JAR" -a "$SPARK_PREPEND_CLASSES" != "1" ]; then
   echo "Failed to find Spark assembly in $ASSEMBLY_DIR." 1>&2

From 146da0d8100490a6e49a6c076ec253cdaf9f8905 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Sun, 25 Oct 2015 01:33:22 +0100
Subject: [PATCH 353/896] Fix typos

Two typos squashed.

BTW Let me know how to proceed with other typos if I ran across any. I don't feel well to leave them aside as much as sending pull requests with such tiny changes. Guide me.

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #9250 from jaceklaskowski/typos-hunting.
---
 core/src/main/scala/org/apache/spark/SparkConf.scala           | 2 +-
 .../main/scala/org/apache/spark/metrics/MetricsSystem.scala    | 2 +-
 .../main/scala/org/apache/spark/scheduler/TaskScheduler.scala  | 3 ++-
 core/src/main/scala/org/apache/spark/util/ThreadUtils.scala    | 2 +-
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkConf.scala b/core/src/main/scala/org/apache/spark/SparkConf.scala
index 58d3b846fd80..f023e4b21cb4 100644
--- a/core/src/main/scala/org/apache/spark/SparkConf.scala
+++ b/core/src/main/scala/org/apache/spark/SparkConf.scala
@@ -621,7 +621,7 @@ private[spark] object SparkConf extends Logging {
   /**
    * Return whether the given config should be passed to an executor on start-up.
    *
-   * Certain akka and authentication configs are required of the executor when it connects to
+   * Certain akka and authentication configs are required from the executor when it connects to
    * the scheduler, while the rest of the spark configs can be inherited from the driver later.
    */
   def isExecutorStartupConf(name: String): Boolean = {
diff --git a/core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala b/core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala
index 48afe3ae3511..fdf76d312db3 100644
--- a/core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala
+++ b/core/src/main/scala/org/apache/spark/metrics/MetricsSystem.scala
@@ -197,7 +197,7 @@ private[spark] class MetricsSystem private (
           }
         } catch {
           case e: Exception => {
-            logError("Sink class " + classPath + " cannot be instantialized")
+            logError("Sink class " + classPath + " cannot be instantiated")
             throw e
           }
         }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskScheduler.scala
index f25f3ed0d903..cb9a3008107d 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskScheduler.scala
@@ -22,7 +22,8 @@ import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.storage.BlockManagerId
 
 /**
- * Low-level task scheduler interface, currently implemented exclusively by TaskSchedulerImpl.
+ * Low-level task scheduler interface, currently implemented exclusively by
+ * [[org.apache.spark.scheduler.TaskSchedulerImpl]].
  * This interface allows plugging in different task schedulers. Each TaskScheduler schedules tasks
  * for a single SparkContext. These schedulers get sets of tasks submitted to them from the
  * DAGScheduler for each stage, and are responsible for sending the tasks to the cluster, running
diff --git a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
index 15e7519d708c..53283448c87b 100644
--- a/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/ThreadUtils.scala
@@ -80,7 +80,7 @@ private[spark] object ThreadUtils {
   }
 
   /**
-   * Wrapper over newSingleThreadScheduledExecutor.
+   * Wrapper over ScheduledThreadPoolExecutor.
    */
   def newDaemonSingleThreadScheduledExecutor(threadName: String): ScheduledExecutorService = {
     val threadFactory = new ThreadFactoryBuilder().setDaemon(true).setNameFormat(threadName).build()

From b67dc6a4342577e73b0600b51052c286c4569960 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sun, 25 Oct 2015 10:31:44 +0100
Subject: [PATCH 354/896] [SPARK-11299][DOC] Fix link to Scala DataFrame
 Functions reference

The SQL programming guide's link to the DataFrame functions reference points to the wrong location; this patch fixes that.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9269 from JoshRosen/SPARK-11299.
---
 docs/sql-programming-guide.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 30206c6f6fd9..f07c9573696e 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -215,7 +215,7 @@ df.groupBy("age").count().show()
 
 For a complete list of the types of operations that can be performed on a DataFrame refer to the [API Documentation](api/scala/index.html#org.apache.spark.sql.DataFrame).
 
-In addition to simple column references and expressions, DataFrames also have a rich library of functions including string manipulation, date arithmetic, common math operations and more.  The complete list is available in the [DataFrame Function Reference](api/scala/index.html#org.apache.spark.sql.DataFrame).
+In addition to simple column references and expressions, DataFrames also have a rich library of functions including string manipulation, date arithmetic, common math operations and more.  The complete list is available in the [DataFrame Function Reference](api/scala/index.html#org.apache.spark.sql.functions$).
 
 
 </div>

From 92b9c5edd90f7b89efc687c0cea6778daa1a6b66 Mon Sep 17 00:00:00 2001
From: Alexander Slesarenko <avslesarenko@gmail.com>
Date: Sun, 25 Oct 2015 10:37:10 +0100
Subject: [PATCH 355/896] [SPARK-6428][SQL] Removed unnecessary typecasts in
 MutableInt, MutableDouble etc.

marmbrus rxin I believe these typecasts are not required in the presence of explicit return types.

Author: Alexander Slesarenko <avslesarenko@gmail.com>

Closes #9262 from aslesarenko/remove-typecasts.
---
 .../expressions/SpecificMutableRow.scala       | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
index 4f56f94bd4ca..475cbe005a6e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
@@ -41,7 +41,7 @@ import org.apache.spark.unsafe.types.UTF8String
  *     val newCopy = new Mutable$tpe
  *     newCopy.isNull = isNull
  *     newCopy.value = value
- *     newCopy.asInstanceOf[this.type]
+ *     newCopy
  *   }
  * }"""
  * }.foreach(println)
@@ -78,7 +78,7 @@ final class MutableInt extends MutableValue {
     val newCopy = new MutableInt
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableInt]
+    newCopy
   }
 }
 
@@ -93,7 +93,7 @@ final class MutableFloat extends MutableValue {
     val newCopy = new MutableFloat
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableFloat]
+    newCopy
   }
 }
 
@@ -108,7 +108,7 @@ final class MutableBoolean extends MutableValue {
     val newCopy = new MutableBoolean
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableBoolean]
+    newCopy
   }
 }
 
@@ -123,7 +123,7 @@ final class MutableDouble extends MutableValue {
     val newCopy = new MutableDouble
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableDouble]
+    newCopy
   }
 }
 
@@ -138,7 +138,7 @@ final class MutableShort extends MutableValue {
     val newCopy = new MutableShort
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableShort]
+    newCopy
   }
 }
 
@@ -153,7 +153,7 @@ final class MutableLong extends MutableValue {
     val newCopy = new MutableLong
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableLong]
+    newCopy
   }
 }
 
@@ -168,7 +168,7 @@ final class MutableByte extends MutableValue {
     val newCopy = new MutableByte
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableByte]
+    newCopy
   }
 }
 
@@ -183,7 +183,7 @@ final class MutableAny extends MutableValue {
     val newCopy = new MutableAny
     newCopy.isNull = isNull
     newCopy.value = value
-    newCopy.asInstanceOf[MutableAny]
+    newCopy
   }
 }
 

From 80279ac1875d488f7000f352a958a35536bd4c2e Mon Sep 17 00:00:00 2001
From: Bryan Cutler <bjcutler@us.ibm.com>
Date: Sun, 25 Oct 2015 19:05:45 +0000
Subject: [PATCH 356/896] [SPARK-11287] Fixed class name to properly start
 TestExecutor from deploy.client.TestClient

Executing deploy.client.TestClient fails due to bad class name for TestExecutor in ApplicationDescription.

Author: Bryan Cutler <bjcutler@us.ibm.com>

Closes #9255 from BryanCutler/fix-TestClient-classname-SPARK-11287.
---
 .../main/scala/org/apache/spark/deploy/client/TestClient.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/client/TestClient.scala b/core/src/main/scala/org/apache/spark/deploy/client/TestClient.scala
index 1c79089303e3..adb3f0225802 100644
--- a/core/src/main/scala/org/apache/spark/deploy/client/TestClient.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/client/TestClient.scala
@@ -48,8 +48,9 @@ private[spark] object TestClient {
     val url = args(0)
     val conf = new SparkConf
     val rpcEnv = RpcEnv.create("spark", Utils.localHostName(), 0, conf, new SecurityManager(conf))
+    val executorClassname = TestExecutor.getClass.getCanonicalName.stripSuffix("$")
     val desc = new ApplicationDescription("TestClient", Some(1), 512,
-      Command("spark.deploy.client.TestExecutor", Seq(), Map(), Seq(), Seq(), Seq()), "ignored")
+      Command(executorClassname, Seq(), Map(), Seq(), Seq(), Seq()), "ignored")
     val listener = new TestListener
     val client = new AppClient(rpcEnv, Array(url), desc, listener, new SparkConf)
     client.start()

From 63accc79625d8a03d0624717af5e1d81b18a6da3 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Sun, 25 Oct 2015 21:18:35 -0700
Subject: [PATCH 357/896] [SPARK-10891][STREAMING][KINESIS] Add MessageHandler
 to KinesisUtils.createStream similar to Direct Kafka

This PR allows users to map a Kinesis `Record` to a generic `T` when creating a Kinesis stream. This is particularly useful, if you would like to do extra work with Kinesis metadata such as sequence number, and partition key.

TODO:
 - [x] add tests

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #8954 from brkyvz/kinesis-handler.
---
 .../kinesis/KinesisBackedBlockRDD.scala       |  35 ++-
 .../kinesis/KinesisInputDStream.scala         |  15 +-
 .../streaming/kinesis/KinesisReceiver.scala   |  18 +-
 .../kinesis/KinesisRecordProcessor.scala      |   4 +-
 .../streaming/kinesis/KinesisUtils.scala      | 247 ++++++++++++++++--
 .../kinesis/JavaKinesisStreamSuite.java       |  29 +-
 .../kinesis/KinesisBackedBlockRDDSuite.scala  |  16 +-
 .../kinesis/KinesisReceiverSuite.scala        |   4 +-
 .../kinesis/KinesisStreamSuite.scala          |  44 +++-
 9 files changed, 337 insertions(+), 75 deletions(-)

diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
index 5d32fa699ae5..000897a4e729 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.streaming.kinesis
 
 import scala.collection.JavaConverters._
+import scala.reflect.ClassTag
 import scala.util.control.NonFatal
 
 import com.amazonaws.auth.{AWSCredentials, DefaultAWSCredentialsProviderChain}
@@ -67,7 +68,7 @@ class KinesisBackedBlockRDDPartition(
  * sequence numbers of the corresponding blocks.
  */
 private[kinesis]
-class KinesisBackedBlockRDD(
+class KinesisBackedBlockRDD[T: ClassTag](
     @transient sc: SparkContext,
     val regionName: String,
     val endpointUrl: String,
@@ -75,8 +76,9 @@ class KinesisBackedBlockRDD(
     @transient val arrayOfseqNumberRanges: Array[SequenceNumberRanges],
     @transient isBlockIdValid: Array[Boolean] = Array.empty,
     val retryTimeoutMs: Int = 10000,
+    val messageHandler: Record => T = KinesisUtils.defaultMessageHandler _,
     val awsCredentialsOption: Option[SerializableAWSCredentials] = None
-  ) extends BlockRDD[Array[Byte]](sc, blockIds) {
+  ) extends BlockRDD[T](sc, blockIds) {
 
   require(blockIds.length == arrayOfseqNumberRanges.length,
     "Number of blockIds is not equal to the number of sequence number ranges")
@@ -90,23 +92,23 @@ class KinesisBackedBlockRDD(
     }
   }
 
-  override def compute(split: Partition, context: TaskContext): Iterator[Array[Byte]] = {
+  override def compute(split: Partition, context: TaskContext): Iterator[T] = {
     val blockManager = SparkEnv.get.blockManager
     val partition = split.asInstanceOf[KinesisBackedBlockRDDPartition]
     val blockId = partition.blockId
 
-    def getBlockFromBlockManager(): Option[Iterator[Array[Byte]]] = {
+    def getBlockFromBlockManager(): Option[Iterator[T]] = {
       logDebug(s"Read partition data of $this from block manager, block $blockId")
-      blockManager.get(blockId).map(_.data.asInstanceOf[Iterator[Array[Byte]]])
+      blockManager.get(blockId).map(_.data.asInstanceOf[Iterator[T]])
     }
 
-    def getBlockFromKinesis(): Iterator[Array[Byte]] = {
-      val credenentials = awsCredentialsOption.getOrElse {
+    def getBlockFromKinesis(): Iterator[T] = {
+      val credentials = awsCredentialsOption.getOrElse {
         new DefaultAWSCredentialsProviderChain().getCredentials()
       }
       partition.seqNumberRanges.ranges.iterator.flatMap { range =>
-        new KinesisSequenceRangeIterator(
-          credenentials, endpointUrl, regionName, range, retryTimeoutMs)
+        new KinesisSequenceRangeIterator(credentials, endpointUrl, regionName,
+          range, retryTimeoutMs).map(messageHandler)
       }
     }
     if (partition.isBlockIdValid) {
@@ -129,8 +131,7 @@ class KinesisSequenceRangeIterator(
     endpointUrl: String,
     regionId: String,
     range: SequenceNumberRange,
-    retryTimeoutMs: Int
-  ) extends NextIterator[Array[Byte]] with Logging {
+    retryTimeoutMs: Int) extends NextIterator[Record] with Logging {
 
   private val client = new AmazonKinesisClient(credentials)
   private val streamName = range.streamName
@@ -142,8 +143,8 @@ class KinesisSequenceRangeIterator(
 
   client.setEndpoint(endpointUrl, "kinesis", regionId)
 
-  override protected def getNext(): Array[Byte] = {
-    var nextBytes: Array[Byte] = null
+  override protected def getNext(): Record = {
+    var nextRecord: Record = null
     if (toSeqNumberReceived) {
       finished = true
     } else {
@@ -170,10 +171,7 @@ class KinesisSequenceRangeIterator(
       } else {
 
         // Get the record, copy the data into a byte array and remember its sequence number
-        val nextRecord: Record = internalIterator.next()
-        val byteBuffer = nextRecord.getData()
-        nextBytes = new Array[Byte](byteBuffer.remaining())
-        byteBuffer.get(nextBytes)
+        nextRecord = internalIterator.next()
         lastSeqNumber = nextRecord.getSequenceNumber()
 
         // If the this record's sequence number matches the stopping sequence number, then make sure
@@ -182,9 +180,8 @@ class KinesisSequenceRangeIterator(
           toSeqNumberReceived = true
         }
       }
-
     }
-    nextBytes
+    nextRecord
   }
 
   override protected def close(): Unit = {
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisInputDStream.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisInputDStream.scala
index 2e4204dcb6f1..72ab6357a53b 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisInputDStream.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisInputDStream.scala
@@ -17,7 +17,10 @@
 
 package org.apache.spark.streaming.kinesis
 
+import scala.reflect.ClassTag
+
 import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream
+import com.amazonaws.services.kinesis.model.Record
 
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.{BlockId, StorageLevel}
@@ -26,7 +29,7 @@ import org.apache.spark.streaming.receiver.Receiver
 import org.apache.spark.streaming.scheduler.ReceivedBlockInfo
 import org.apache.spark.streaming.{Duration, StreamingContext, Time}
 
-private[kinesis] class KinesisInputDStream(
+private[kinesis] class KinesisInputDStream[T: ClassTag](
     @transient _ssc: StreamingContext,
     streamName: String,
     endpointUrl: String,
@@ -35,11 +38,12 @@ private[kinesis] class KinesisInputDStream(
     checkpointAppName: String,
     checkpointInterval: Duration,
     storageLevel: StorageLevel,
+    messageHandler: Record => T,
     awsCredentialsOption: Option[SerializableAWSCredentials]
-  ) extends ReceiverInputDStream[Array[Byte]](_ssc) {
+  ) extends ReceiverInputDStream[T](_ssc) {
 
   private[streaming]
-  override def createBlockRDD(time: Time, blockInfos: Seq[ReceivedBlockInfo]): RDD[Array[Byte]] = {
+  override def createBlockRDD(time: Time, blockInfos: Seq[ReceivedBlockInfo]): RDD[T] = {
 
     // This returns true even for when blockInfos is empty
     val allBlocksHaveRanges = blockInfos.map { _.metadataOption }.forall(_.nonEmpty)
@@ -56,6 +60,7 @@ private[kinesis] class KinesisInputDStream(
         context.sc, regionName, endpointUrl, blockIds, seqNumRanges,
         isBlockIdValid = isBlockIdValid,
         retryTimeoutMs = ssc.graph.batchDuration.milliseconds.toInt,
+        messageHandler = messageHandler,
         awsCredentialsOption = awsCredentialsOption)
     } else {
       logWarning("Kinesis sequence number information was not present with some block metadata," +
@@ -64,8 +69,8 @@ private[kinesis] class KinesisInputDStream(
     }
   }
 
-  override def getReceiver(): Receiver[Array[Byte]] = {
+  override def getReceiver(): Receiver[T] = {
     new KinesisReceiver(streamName, endpointUrl, regionName, initialPositionInStream,
-      checkpointAppName, checkpointInterval, storageLevel, awsCredentialsOption)
+      checkpointAppName, checkpointInterval, storageLevel, messageHandler, awsCredentialsOption)
   }
 }
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
index 6e0988c1af8a..134d627cdaff 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
@@ -80,7 +80,7 @@ case class SerializableAWSCredentials(accessKeyId: String, secretKey: String)
  * @param awsCredentialsOption Optional AWS credentials, used when user directly specifies
  *                             the credentials
  */
-private[kinesis] class KinesisReceiver(
+private[kinesis] class KinesisReceiver[T](
     val streamName: String,
     endpointUrl: String,
     regionName: String,
@@ -88,8 +88,9 @@ private[kinesis] class KinesisReceiver(
     checkpointAppName: String,
     checkpointInterval: Duration,
     storageLevel: StorageLevel,
-    awsCredentialsOption: Option[SerializableAWSCredentials]
-  ) extends Receiver[Array[Byte]](storageLevel) with Logging { receiver =>
+    messageHandler: Record => T,
+    awsCredentialsOption: Option[SerializableAWSCredentials])
+  extends Receiver[T](storageLevel) with Logging { receiver =>
 
   /*
    * =================================================================================
@@ -202,12 +203,7 @@ private[kinesis] class KinesisReceiver(
   /** Add records of the given shard to the current block being generated */
   private[kinesis] def addRecords(shardId: String, records: java.util.List[Record]): Unit = {
     if (records.size > 0) {
-      val dataIterator = records.iterator().asScala.map { record =>
-        val byteBuffer = record.getData()
-        val byteArray = new Array[Byte](byteBuffer.remaining())
-        byteBuffer.get(byteArray)
-        byteArray
-      }
+      val dataIterator = records.iterator().asScala.map(messageHandler)
       val metadata = SequenceNumberRange(streamName, shardId,
         records.get(0).getSequenceNumber(), records.get(records.size() - 1).getSequenceNumber())
       blockGenerator.addMultipleDataWithCallback(dataIterator, metadata)
@@ -240,7 +236,7 @@ private[kinesis] class KinesisReceiver(
 
   /** Store the block along with its associated ranges */
   private def storeBlockWithRanges(
-      blockId: StreamBlockId, arrayBuffer: mutable.ArrayBuffer[Array[Byte]]): Unit = {
+      blockId: StreamBlockId, arrayBuffer: mutable.ArrayBuffer[T]): Unit = {
     val rangesToReportOption = blockIdToSeqNumRanges.remove(blockId)
     if (rangesToReportOption.isEmpty) {
       stop("Error while storing block into Spark, could not find sequence number ranges " +
@@ -325,7 +321,7 @@ private[kinesis] class KinesisReceiver(
     /** Callback method called when a block is ready to be pushed / stored. */
     def onPushBlock(blockId: StreamBlockId, arrayBuffer: mutable.ArrayBuffer[_]): Unit = {
       storeBlockWithRanges(blockId,
-        arrayBuffer.asInstanceOf[mutable.ArrayBuffer[Array[Byte]]])
+        arrayBuffer.asInstanceOf[mutable.ArrayBuffer[T]])
     }
 
     /** Callback called in case of any error in internal of the BlockGenerator */
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
index b2405123321e..1d5178790ec4 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
@@ -41,8 +41,8 @@ import org.apache.spark.Logging
  * @param checkpointState represents the checkpoint state including the next checkpoint time.
  *   It's injected here for mocking purposes.
  */
-private[kinesis] class KinesisRecordProcessor(
-    receiver: KinesisReceiver,
+private[kinesis] class KinesisRecordProcessor[T](
+    receiver: KinesisReceiver[T],
     workerId: String,
     checkpointState: KinesisCheckpointState) extends IRecordProcessor with Logging {
 
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisUtils.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisUtils.scala
index c799fadf2d5c..2849fd8a8210 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisUtils.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisUtils.scala
@@ -16,16 +16,120 @@
  */
 package org.apache.spark.streaming.kinesis
 
+import scala.reflect.ClassTag
+
 import com.amazonaws.regions.RegionUtils
 import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream
+import com.amazonaws.services.kinesis.model.Record
 
+import org.apache.spark.api.java.function.{Function => JFunction}
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.streaming.api.java.{JavaReceiverInputDStream, JavaStreamingContext}
 import org.apache.spark.streaming.dstream.ReceiverInputDStream
 import org.apache.spark.streaming.{Duration, StreamingContext}
 
-
 object KinesisUtils {
+  /**
+   * Create an input stream that pulls messages from a Kinesis stream.
+   * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
+   *
+   * Note: The AWS credentials will be discovered using the DefaultAWSCredentialsProviderChain
+   * on the workers. See AWS documentation to understand how DefaultAWSCredentialsProviderChain
+   * gets the AWS credentials.
+   *
+   * @param ssc StreamingContext object
+   * @param kinesisAppName  Kinesis application name used by the Kinesis Client Library
+   *                        (KCL) to update DynamoDB
+   * @param streamName   Kinesis stream name
+   * @param endpointUrl  Url of Kinesis service (e.g., https://kinesis.us-east-1.amazonaws.com)
+   * @param regionName   Name of region used by the Kinesis Client Library (KCL) to update
+   *                     DynamoDB (lease coordination and checkpointing) and CloudWatch (metrics)
+   * @param initialPositionInStream  In the absence of Kinesis checkpoint info, this is the
+   *                                 worker's initial starting position in the stream.
+   *                                 The values are either the beginning of the stream
+   *                                 per Kinesis' limit of 24 hours
+   *                                 (InitialPositionInStream.TRIM_HORIZON) or
+   *                                 the tip of the stream (InitialPositionInStream.LATEST).
+   * @param checkpointInterval  Checkpoint interval for Kinesis checkpointing.
+   *                            See the Kinesis Spark Streaming documentation for more
+   *                            details on the different types of checkpoints.
+   * @param storageLevel Storage level to use for storing the received objects.
+   *                     StorageLevel.MEMORY_AND_DISK_2 is recommended.
+   * @param messageHandler A custom message handler that can generate a generic output from a
+   *                       Kinesis `Record`, which contains both message data, and metadata.
+   */
+  def createStream[T: ClassTag](
+      ssc: StreamingContext,
+      kinesisAppName: String,
+      streamName: String,
+      endpointUrl: String,
+      regionName: String,
+      initialPositionInStream: InitialPositionInStream,
+      checkpointInterval: Duration,
+      storageLevel: StorageLevel,
+      messageHandler: Record => T): ReceiverInputDStream[T] = {
+    val cleanedHandler = ssc.sc.clean(messageHandler)
+    // Setting scope to override receiver stream's scope of "receiver stream"
+    ssc.withNamedScope("kinesis stream") {
+      new KinesisInputDStream[T](ssc, streamName, endpointUrl, validateRegion(regionName),
+        initialPositionInStream, kinesisAppName, checkpointInterval, storageLevel,
+        cleanedHandler, None)
+    }
+  }
+
+  /**
+   * Create an input stream that pulls messages from a Kinesis stream.
+   * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
+   *
+   * Note:
+   *  The given AWS credentials will get saved in DStream checkpoints if checkpointing
+   *  is enabled. Make sure that your checkpoint directory is secure.
+   *
+   * @param ssc StreamingContext object
+   * @param kinesisAppName  Kinesis application name used by the Kinesis Client Library
+   *                        (KCL) to update DynamoDB
+   * @param streamName   Kinesis stream name
+   * @param endpointUrl  Url of Kinesis service (e.g., https://kinesis.us-east-1.amazonaws.com)
+   * @param regionName   Name of region used by the Kinesis Client Library (KCL) to update
+   *                     DynamoDB (lease coordination and checkpointing) and CloudWatch (metrics)
+   * @param initialPositionInStream  In the absence of Kinesis checkpoint info, this is the
+   *                                 worker's initial starting position in the stream.
+   *                                 The values are either the beginning of the stream
+   *                                 per Kinesis' limit of 24 hours
+   *                                 (InitialPositionInStream.TRIM_HORIZON) or
+   *                                 the tip of the stream (InitialPositionInStream.LATEST).
+   * @param checkpointInterval  Checkpoint interval for Kinesis checkpointing.
+   *                            See the Kinesis Spark Streaming documentation for more
+   *                            details on the different types of checkpoints.
+   * @param storageLevel Storage level to use for storing the received objects.
+   *                     StorageLevel.MEMORY_AND_DISK_2 is recommended.
+   * @param messageHandler A custom message handler that can generate a generic output from a
+   *                       Kinesis `Record`, which contains both message data, and metadata.
+   * @param awsAccessKeyId  AWS AccessKeyId (if null, will use DefaultAWSCredentialsProviderChain)
+   * @param awsSecretKey  AWS SecretKey (if null, will use DefaultAWSCredentialsProviderChain)
+   */
+  // scalastyle:off
+  def createStream[T: ClassTag](
+      ssc: StreamingContext,
+      kinesisAppName: String,
+      streamName: String,
+      endpointUrl: String,
+      regionName: String,
+      initialPositionInStream: InitialPositionInStream,
+      checkpointInterval: Duration,
+      storageLevel: StorageLevel,
+      messageHandler: Record => T,
+      awsAccessKeyId: String,
+      awsSecretKey: String): ReceiverInputDStream[T] = {
+    // scalastyle:on
+    val cleanedHandler = ssc.sc.clean(messageHandler)
+    ssc.withNamedScope("kinesis stream") {
+      new KinesisInputDStream[T](ssc, streamName, endpointUrl, validateRegion(regionName),
+        initialPositionInStream, kinesisAppName, checkpointInterval, storageLevel,
+        cleanedHandler, Some(SerializableAWSCredentials(awsAccessKeyId, awsSecretKey)))
+    }
+  }
+
   /**
    * Create an input stream that pulls messages from a Kinesis stream.
    * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
@@ -61,12 +165,12 @@ object KinesisUtils {
       regionName: String,
       initialPositionInStream: InitialPositionInStream,
       checkpointInterval: Duration,
-      storageLevel: StorageLevel
-    ): ReceiverInputDStream[Array[Byte]] = {
+      storageLevel: StorageLevel): ReceiverInputDStream[Array[Byte]] = {
     // Setting scope to override receiver stream's scope of "receiver stream"
     ssc.withNamedScope("kinesis stream") {
-      new KinesisInputDStream(ssc, streamName, endpointUrl, validateRegion(regionName),
-        initialPositionInStream, kinesisAppName, checkpointInterval, storageLevel, None)
+      new KinesisInputDStream[Array[Byte]](ssc, streamName, endpointUrl, validateRegion(regionName),
+        initialPositionInStream, kinesisAppName, checkpointInterval, storageLevel,
+        defaultMessageHandler, None)
     }
   }
 
@@ -109,12 +213,11 @@ object KinesisUtils {
       checkpointInterval: Duration,
       storageLevel: StorageLevel,
       awsAccessKeyId: String,
-      awsSecretKey: String
-    ): ReceiverInputDStream[Array[Byte]] = {
+      awsSecretKey: String): ReceiverInputDStream[Array[Byte]] = {
     ssc.withNamedScope("kinesis stream") {
-      new KinesisInputDStream(ssc, streamName, endpointUrl, validateRegion(regionName),
+      new KinesisInputDStream[Array[Byte]](ssc, streamName, endpointUrl, validateRegion(regionName),
         initialPositionInStream, kinesisAppName, checkpointInterval, storageLevel,
-        Some(SerializableAWSCredentials(awsAccessKeyId, awsSecretKey)))
+        defaultMessageHandler, Some(SerializableAWSCredentials(awsAccessKeyId, awsSecretKey)))
     }
   }
 
@@ -156,11 +259,113 @@ object KinesisUtils {
       storageLevel: StorageLevel
     ): ReceiverInputDStream[Array[Byte]] = {
     ssc.withNamedScope("kinesis stream") {
-      new KinesisInputDStream(ssc, streamName, endpointUrl, getRegionByEndpoint(endpointUrl),
-        initialPositionInStream, ssc.sc.appName, checkpointInterval, storageLevel, None)
+      new KinesisInputDStream[Array[Byte]](ssc, streamName, endpointUrl,
+        getRegionByEndpoint(endpointUrl), initialPositionInStream, ssc.sc.appName,
+        checkpointInterval, storageLevel, defaultMessageHandler, None)
     }
   }
 
+  /**
+   * Create an input stream that pulls messages from a Kinesis stream.
+   * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
+   *
+   * Note: The AWS credentials will be discovered using the DefaultAWSCredentialsProviderChain
+   * on the workers. See AWS documentation to understand how DefaultAWSCredentialsProviderChain
+   * gets the AWS credentials.
+   *
+   * @param jssc Java StreamingContext object
+   * @param kinesisAppName  Kinesis application name used by the Kinesis Client Library
+   *                        (KCL) to update DynamoDB
+   * @param streamName   Kinesis stream name
+   * @param endpointUrl  Url of Kinesis service (e.g., https://kinesis.us-east-1.amazonaws.com)
+   * @param regionName   Name of region used by the Kinesis Client Library (KCL) to update
+   *                     DynamoDB (lease coordination and checkpointing) and CloudWatch (metrics)
+   * @param initialPositionInStream  In the absence of Kinesis checkpoint info, this is the
+   *                                 worker's initial starting position in the stream.
+   *                                 The values are either the beginning of the stream
+   *                                 per Kinesis' limit of 24 hours
+   *                                 (InitialPositionInStream.TRIM_HORIZON) or
+   *                                 the tip of the stream (InitialPositionInStream.LATEST).
+   * @param checkpointInterval  Checkpoint interval for Kinesis checkpointing.
+   *                            See the Kinesis Spark Streaming documentation for more
+   *                            details on the different types of checkpoints.
+   * @param storageLevel Storage level to use for storing the received objects.
+   *                     StorageLevel.MEMORY_AND_DISK_2 is recommended.
+   * @param messageHandler A custom message handler that can generate a generic output from a
+   *                       Kinesis `Record`, which contains both message data, and metadata.
+   * @param recordClass Class of the records in DStream
+   */
+  def createStream[T](
+      jssc: JavaStreamingContext,
+      kinesisAppName: String,
+      streamName: String,
+      endpointUrl: String,
+      regionName: String,
+      initialPositionInStream: InitialPositionInStream,
+      checkpointInterval: Duration,
+      storageLevel: StorageLevel,
+      messageHandler: JFunction[Record, T],
+      recordClass: Class[T]): JavaReceiverInputDStream[T] = {
+    implicit val recordCmt: ClassTag[T] = ClassTag(recordClass)
+    val cleanedHandler = jssc.sparkContext.clean(messageHandler.call(_))
+    createStream[T](jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
+      initialPositionInStream, checkpointInterval, storageLevel, cleanedHandler)
+  }
+
+  /**
+   * Create an input stream that pulls messages from a Kinesis stream.
+   * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
+   *
+   * Note:
+   * The given AWS credentials will get saved in DStream checkpoints if checkpointing
+   * is enabled. Make sure that your checkpoint directory is secure.
+   *
+   * @param jssc Java StreamingContext object
+   * @param kinesisAppName  Kinesis application name used by the Kinesis Client Library
+   *                        (KCL) to update DynamoDB
+   * @param streamName   Kinesis stream name
+   * @param endpointUrl  Url of Kinesis service (e.g., https://kinesis.us-east-1.amazonaws.com)
+   * @param regionName   Name of region used by the Kinesis Client Library (KCL) to update
+   *                     DynamoDB (lease coordination and checkpointing) and CloudWatch (metrics)
+   * @param initialPositionInStream  In the absence of Kinesis checkpoint info, this is the
+   *                                 worker's initial starting position in the stream.
+   *                                 The values are either the beginning of the stream
+   *                                 per Kinesis' limit of 24 hours
+   *                                 (InitialPositionInStream.TRIM_HORIZON) or
+   *                                 the tip of the stream (InitialPositionInStream.LATEST).
+   * @param checkpointInterval  Checkpoint interval for Kinesis checkpointing.
+   *                            See the Kinesis Spark Streaming documentation for more
+   *                            details on the different types of checkpoints.
+   * @param storageLevel Storage level to use for storing the received objects.
+   *                     StorageLevel.MEMORY_AND_DISK_2 is recommended.
+   * @param messageHandler A custom message handler that can generate a generic output from a
+   *                       Kinesis `Record`, which contains both message data, and metadata.
+   * @param recordClass Class of the records in DStream
+   * @param awsAccessKeyId  AWS AccessKeyId (if null, will use DefaultAWSCredentialsProviderChain)
+   * @param awsSecretKey  AWS SecretKey (if null, will use DefaultAWSCredentialsProviderChain)
+   */
+  // scalastyle:off
+  def createStream[T](
+      jssc: JavaStreamingContext,
+      kinesisAppName: String,
+      streamName: String,
+      endpointUrl: String,
+      regionName: String,
+      initialPositionInStream: InitialPositionInStream,
+      checkpointInterval: Duration,
+      storageLevel: StorageLevel,
+      messageHandler: JFunction[Record, T],
+      recordClass: Class[T],
+      awsAccessKeyId: String,
+      awsSecretKey: String): JavaReceiverInputDStream[T] = {
+    // scalastyle:on
+    implicit val recordCmt: ClassTag[T] = ClassTag(recordClass)
+    val cleanedHandler = jssc.sparkContext.clean(messageHandler.call(_))
+    createStream[T](jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
+      initialPositionInStream, checkpointInterval, storageLevel, cleanedHandler,
+      awsAccessKeyId, awsSecretKey)
+  }
+
   /**
    * Create an input stream that pulls messages from a Kinesis stream.
    * This uses the Kinesis Client Library (KCL) to pull messages from Kinesis.
@@ -198,8 +403,8 @@ object KinesisUtils {
       checkpointInterval: Duration,
       storageLevel: StorageLevel
     ): JavaReceiverInputDStream[Array[Byte]] = {
-    createStream(jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
-      initialPositionInStream, checkpointInterval, storageLevel)
+    createStream[Array[Byte]](jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
+      initialPositionInStream, checkpointInterval, storageLevel, defaultMessageHandler(_))
   }
 
   /**
@@ -241,10 +446,10 @@ object KinesisUtils {
       checkpointInterval: Duration,
       storageLevel: StorageLevel,
       awsAccessKeyId: String,
-      awsSecretKey: String
-    ): JavaReceiverInputDStream[Array[Byte]] = {
-    createStream(jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
-        initialPositionInStream, checkpointInterval, storageLevel, awsAccessKeyId, awsSecretKey)
+      awsSecretKey: String): JavaReceiverInputDStream[Array[Byte]] = {
+    createStream[Array[Byte]](jssc.ssc, kinesisAppName, streamName, endpointUrl, regionName,
+      initialPositionInStream, checkpointInterval, storageLevel,
+      defaultMessageHandler(_), awsAccessKeyId, awsSecretKey)
   }
 
   /**
@@ -297,6 +502,14 @@ object KinesisUtils {
       throw new IllegalArgumentException(s"Region name '$regionName' is not valid")
     }
   }
+
+  private[kinesis] def defaultMessageHandler(record: Record): Array[Byte] = {
+    if (record == null) return null
+    val byteBuffer = record.getData()
+    val byteArray = new Array[Byte](byteBuffer.remaining())
+    byteBuffer.get(byteArray)
+    byteArray
+  }
 }
 
 /**
diff --git a/extras/kinesis-asl/src/test/java/org/apache/spark/streaming/kinesis/JavaKinesisStreamSuite.java b/extras/kinesis-asl/src/test/java/org/apache/spark/streaming/kinesis/JavaKinesisStreamSuite.java
index 87954a31f60c..3f0f6793d2d2 100644
--- a/extras/kinesis-asl/src/test/java/org/apache/spark/streaming/kinesis/JavaKinesisStreamSuite.java
+++ b/extras/kinesis-asl/src/test/java/org/apache/spark/streaming/kinesis/JavaKinesisStreamSuite.java
@@ -17,14 +17,19 @@
 
 package org.apache.spark.streaming.kinesis;
 
+import com.amazonaws.services.kinesis.model.Record;
+import org.junit.Test;
+
+import org.apache.spark.api.java.function.Function;
 import org.apache.spark.storage.StorageLevel;
 import org.apache.spark.streaming.Duration;
 import org.apache.spark.streaming.LocalJavaStreamingContext;
 import org.apache.spark.streaming.api.java.JavaDStream;
-import org.junit.Test;
 
 import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream;
 
+import java.nio.ByteBuffer;
+
 /**
  * Demonstrate the use of the KinesisUtils Java API
  */
@@ -33,9 +38,27 @@ public class JavaKinesisStreamSuite extends LocalJavaStreamingContext {
   public void testKinesisStream() {
     // Tests the API, does not actually test data receiving
     JavaDStream<byte[]> kinesisStream = KinesisUtils.createStream(ssc, "mySparkStream",
-        "https://kinesis.us-west-2.amazonaws.com", new Duration(2000), 
+        "https://kinesis.us-west-2.amazonaws.com", new Duration(2000),
         InitialPositionInStream.LATEST, StorageLevel.MEMORY_AND_DISK_2());
-    
+
+    ssc.stop();
+  }
+
+
+  private static Function<Record, String> handler = new Function<Record, String>() {
+    @Override
+    public String call(Record record) {
+      return record.getPartitionKey() + "-" + record.getSequenceNumber();
+    }
+  };
+
+  @Test
+  public void testCustomHandler() {
+    // Tests the API, does not actually test data receiving
+    JavaDStream<String> kinesisStream = KinesisUtils.createStream(ssc, "testApp", "mySparkStream",
+        "https://kinesis.us-west-2.amazonaws.com", "us-west-2", InitialPositionInStream.LATEST,
+        new Duration(2000), StorageLevel.MEMORY_AND_DISK_2(), handler, String.class);
+
     ssc.stop();
   }
 }
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
index a89e5627e014..9f9e146a08d4 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
@@ -73,22 +73,22 @@ class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll
 
   testIfEnabled("Basic reading from Kinesis") {
     // Verify all data using multiple ranges in a single RDD partition
-    val receivedData1 = new KinesisBackedBlockRDD(sc, testUtils.regionName, testUtils.endpointUrl,
-      fakeBlockIds(1),
+    val receivedData1 = new KinesisBackedBlockRDD[Array[Byte]](sc, testUtils.regionName,
+      testUtils.endpointUrl, fakeBlockIds(1),
       Array(SequenceNumberRanges(allRanges.toArray))
     ).map { bytes => new String(bytes).toInt }.collect()
     assert(receivedData1.toSet === testData.toSet)
 
     // Verify all data using one range in each of the multiple RDD partitions
-    val receivedData2 = new KinesisBackedBlockRDD(sc, testUtils.regionName, testUtils.endpointUrl,
-      fakeBlockIds(allRanges.size),
+    val receivedData2 = new KinesisBackedBlockRDD[Array[Byte]](sc, testUtils.regionName,
+      testUtils.endpointUrl, fakeBlockIds(allRanges.size),
       allRanges.map { range => SequenceNumberRanges(Array(range)) }.toArray
     ).map { bytes => new String(bytes).toInt }.collect()
     assert(receivedData2.toSet === testData.toSet)
 
     // Verify ordering within each partition
-    val receivedData3 = new KinesisBackedBlockRDD(sc, testUtils.regionName, testUtils.endpointUrl,
-      fakeBlockIds(allRanges.size),
+    val receivedData3 = new KinesisBackedBlockRDD[Array[Byte]](sc, testUtils.regionName,
+      testUtils.endpointUrl, fakeBlockIds(allRanges.size),
       allRanges.map { range => SequenceNumberRanges(Array(range)) }.toArray
     ).map { bytes => new String(bytes).toInt }.collectPartitions()
     assert(receivedData3.length === allRanges.size)
@@ -209,7 +209,7 @@ class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll
       }, "Incorrect configuration of RDD, unexpected ranges set"
     )
 
-    val rdd = new KinesisBackedBlockRDD(
+    val rdd = new KinesisBackedBlockRDD[Array[Byte]](
       sc, testUtils.regionName, testUtils.endpointUrl, blockIds, ranges)
     val collectedData = rdd.map { bytes =>
       new String(bytes).toInt
@@ -223,7 +223,7 @@ class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll
     if (testIsBlockValid) {
       require(numPartitionsInBM === numPartitions, "All partitions must be in BlockManager")
       require(numPartitionsInKinesis === 0, "No partitions must be in Kinesis")
-      val rdd2 = new KinesisBackedBlockRDD(
+      val rdd2 = new KinesisBackedBlockRDD[Array[Byte]](
         sc, testUtils.regionName, testUtils.endpointUrl, blockIds.toArray, ranges,
         isBlockIdValid = Array.fill(blockIds.length)(false))
       intercept[SparkException] {
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
index 3d136aec2e70..17ab444704f4 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
@@ -52,14 +52,14 @@ class KinesisReceiverSuite extends TestSuiteBase with Matchers with BeforeAndAft
   record2.setData(ByteBuffer.wrap("Learning Spark".getBytes(StandardCharsets.UTF_8)))
   val batch = Arrays.asList(record1, record2)
 
-  var receiverMock: KinesisReceiver = _
+  var receiverMock: KinesisReceiver[Array[Byte]] = _
   var checkpointerMock: IRecordProcessorCheckpointer = _
   var checkpointClockMock: ManualClock = _
   var checkpointStateMock: KinesisCheckpointState = _
   var currentClockMock: Clock = _
 
   override def beforeFunction(): Unit = {
-    receiverMock = mock[KinesisReceiver]
+    receiverMock = mock[KinesisReceiver[Array[Byte]]]
     checkpointerMock = mock[IRecordProcessorCheckpointer]
     checkpointClockMock = mock[ManualClock]
     checkpointStateMock = mock[KinesisCheckpointState]
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
index 1177dc758100..ba84e557dfcc 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
@@ -24,6 +24,7 @@ import scala.util.Random
 
 import com.amazonaws.regions.RegionUtils
 import com.amazonaws.services.kinesis.clientlibrary.lib.worker.InitialPositionInStream
+import com.amazonaws.services.kinesis.model.Record
 import org.scalatest.Matchers._
 import org.scalatest.concurrent.Eventually
 import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll}
@@ -31,6 +32,7 @@ import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.{StorageLevel, StreamBlockId}
 import org.apache.spark.streaming._
+import org.apache.spark.streaming.dstream.ReceiverInputDStream
 import org.apache.spark.streaming.kinesis.KinesisTestUtils._
 import org.apache.spark.streaming.receiver.BlockManagerBasedStoreResult
 import org.apache.spark.streaming.scheduler.ReceivedBlockInfo
@@ -113,9 +115,9 @@ class KinesisStreamSuite extends KinesisFunSuite
     val inputStream = KinesisUtils.createStream(ssc, appName, "dummyStream",
       dummyEndpointUrl, dummyRegionName, InitialPositionInStream.LATEST, Seconds(2),
       StorageLevel.MEMORY_AND_DISK_2, dummyAWSAccessKey, dummyAWSSecretKey)
-    assert(inputStream.isInstanceOf[KinesisInputDStream])
+    assert(inputStream.isInstanceOf[KinesisInputDStream[Array[Byte]]])
 
-    val kinesisStream = inputStream.asInstanceOf[KinesisInputDStream]
+    val kinesisStream = inputStream.asInstanceOf[KinesisInputDStream[Array[Byte]]]
     val time = Time(1000)
 
     // Generate block info data for testing
@@ -134,8 +136,8 @@ class KinesisStreamSuite extends KinesisFunSuite
     // Verify that the generated KinesisBackedBlockRDD has the all the right information
     val blockInfos = Seq(blockInfo1, blockInfo2)
     val nonEmptyRDD = kinesisStream.createBlockRDD(time, blockInfos)
-    nonEmptyRDD shouldBe a [KinesisBackedBlockRDD]
-    val kinesisRDD = nonEmptyRDD.asInstanceOf[KinesisBackedBlockRDD]
+    nonEmptyRDD shouldBe a [KinesisBackedBlockRDD[Array[Byte]]]
+    val kinesisRDD = nonEmptyRDD.asInstanceOf[KinesisBackedBlockRDD[Array[Byte]]]
     assert(kinesisRDD.regionName === dummyRegionName)
     assert(kinesisRDD.endpointUrl === dummyEndpointUrl)
     assert(kinesisRDD.retryTimeoutMs === batchDuration.milliseconds)
@@ -151,7 +153,7 @@ class KinesisStreamSuite extends KinesisFunSuite
 
     // Verify that KinesisBackedBlockRDD is generated even when there are no blocks
     val emptyRDD = kinesisStream.createBlockRDD(time, Seq.empty)
-    emptyRDD shouldBe a [KinesisBackedBlockRDD]
+    emptyRDD shouldBe a [KinesisBackedBlockRDD[Array[Byte]]]
     emptyRDD.partitions shouldBe empty
 
     // Verify that the KinesisBackedBlockRDD has isBlockValid = false when blocks are invalid
@@ -192,6 +194,32 @@ class KinesisStreamSuite extends KinesisFunSuite
     ssc.stop(stopSparkContext = false)
   }
 
+  testIfEnabled("custom message handling") {
+    val awsCredentials = KinesisTestUtils.getAWSCredentials()
+    def addFive(r: Record): Int = new String(r.getData.array()).toInt + 5
+    val stream = KinesisUtils.createStream(ssc, appName, testUtils.streamName,
+      testUtils.endpointUrl, testUtils.regionName, InitialPositionInStream.LATEST,
+      Seconds(10), StorageLevel.MEMORY_ONLY, addFive,
+      awsCredentials.getAWSAccessKeyId, awsCredentials.getAWSSecretKey)
+
+    stream shouldBe a [ReceiverInputDStream[Int]]
+
+    val collected = new mutable.HashSet[Int] with mutable.SynchronizedSet[Int]
+    stream.foreachRDD { rdd =>
+      collected ++= rdd.collect()
+      logInfo("Collected = " + rdd.collect().toSeq.mkString(", "))
+    }
+    ssc.start()
+
+    val testData = 1 to 10
+    eventually(timeout(120 seconds), interval(10 second)) {
+      testUtils.pushData(testData)
+      val modData = testData.map(_ + 5)
+      assert(collected === modData.toSet, "\nData received does not match data sent")
+    }
+    ssc.stop(stopSparkContext = false)
+  }
+
   testIfEnabled("failure recovery") {
     val sparkConf = new SparkConf().setMaster("local[4]").setAppName(this.getClass.getSimpleName)
     val checkpointDir = Utils.createTempDir().getAbsolutePath
@@ -210,7 +238,7 @@ class KinesisStreamSuite extends KinesisFunSuite
 
     // Verify that the generated RDDs are KinesisBackedBlockRDDs, and collect the data in each batch
     kinesisStream.foreachRDD((rdd: RDD[Array[Byte]], time: Time) => {
-      val kRdd = rdd.asInstanceOf[KinesisBackedBlockRDD]
+      val kRdd = rdd.asInstanceOf[KinesisBackedBlockRDD[Array[Byte]]]
       val data = rdd.map { bytes => new String(bytes).toInt }.collect().toSeq
       collectedData(time) = (kRdd.arrayOfseqNumberRanges, data)
     })
@@ -243,10 +271,10 @@ class KinesisStreamSuite extends KinesisFunSuite
     times.foreach { time =>
       val (arrayOfSeqNumRanges, data) = collectedData(time)
       val rdd = recoveredKinesisStream.getOrCompute(time).get.asInstanceOf[RDD[Array[Byte]]]
-      rdd shouldBe a [KinesisBackedBlockRDD]
+      rdd shouldBe a [KinesisBackedBlockRDD[Array[Byte]]]
 
       // Verify the recovered sequence ranges
-      val kRdd = rdd.asInstanceOf[KinesisBackedBlockRDD]
+      val kRdd = rdd.asInstanceOf[KinesisBackedBlockRDD[Array[Byte]]]
       assert(kRdd.arrayOfseqNumberRanges.size === arrayOfSeqNumRanges.size)
       arrayOfSeqNumRanges.zip(kRdd.arrayOfseqNumberRanges).foreach { case (expected, found) =>
         assert(expected.ranges.toSeq === found.ranges.toSeq)

From 85e654c5ec87e666a8845bfd77185c1ea57b268a Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sun, 25 Oct 2015 21:19:52 -0700
Subject: [PATCH 358/896] [SPARK-10984] Simplify *MemoryManager class structure

This patch refactors the MemoryManager class structure. After #9000, Spark had the following classes:

- MemoryManager
- StaticMemoryManager
- ExecutorMemoryManager
- TaskMemoryManager
- ShuffleMemoryManager

This is fairly confusing. To simplify things, this patch consolidates several of these classes:

- ShuffleMemoryManager and ExecutorMemoryManager were merged into MemoryManager.
- TaskMemoryManager is moved into Spark Core.

**Key changes and tasks**:

- [x] Merge ExecutorMemoryManager into MemoryManager.
  - [x] Move pooling logic into Allocator.
- [x] Move TaskMemoryManager from `spark-unsafe` to `spark-core`.
- [x] Refactor the existing Tungsten TaskMemoryManager interactions so Tungsten code use only this and not both this and ShuffleMemoryManager.
- [x] Refactor non-Tungsten code to use the TaskMemoryManager instead of ShuffleMemoryManager.
- [x] Merge ShuffleMemoryManager into MemoryManager.
  - [x] Move code
  - [x] ~~Simplify 1/n calculation.~~ **Will defer to followup, since this needs more work.**
- [x] Port ShuffleMemoryManagerSuite tests.
- [x] Move classes from `unsafe` package to `memory` package.
- [ ] Figure out how to handle the hacky use of the memory managers in HashedRelation's broadcast variable construction.
- [x] Test porting and cleanup: several tests relied on mock functionality (such as `TestShuffleMemoryManager.markAsOutOfMemory`) which has been changed or broken during the memory manager consolidation
  - [x] AbstractBytesToBytesMapSuite
  - [x] UnsafeExternalSorterSuite
  - [x] UnsafeFixedWidthAggregationMapSuite
  - [x] UnsafeKVExternalSorterSuite

**Compatiblity notes**:

- This patch introduces breaking changes in `ExternalAppendOnlyMap`, which is marked as `DevloperAPI` (likely for legacy reasons): this class now cannot be used outside of a task.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9127 from JoshRosen/SPARK-10984.
---
 .../spark}/memory/TaskMemoryManager.java      | 111 +++---
 .../shuffle/sort/PackedRecordPointer.java     |   4 +-
 .../shuffle/sort/ShuffleExternalSorter.java   |  57 ++-
 .../shuffle/sort/UnsafeShuffleWriter.java     |   7 +-
 .../spark/unsafe/map/BytesToBytesMap.java     |  36 +-
 .../sort/RecordPointerAndKeyPrefix.java       |   4 +-
 .../unsafe/sort/UnsafeExternalSorter.java     |  51 +--
 .../unsafe/sort/UnsafeInMemorySorter.java     |   2 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  23 +-
 .../scala/org/apache/spark/TaskContext.scala  |   2 +-
 .../org/apache/spark/TaskContextImpl.scala    |   2 +-
 .../org/apache/spark/executor/Executor.scala  |   4 +-
 .../apache/spark/memory/MemoryManager.scala   | 197 ++++++++++-
 .../spark/memory/StaticMemoryManager.scala    |  12 +-
 .../spark/memory/UnifiedMemoryManager.scala   |  12 +-
 .../org/apache/spark/scheduler/Task.scala     |   6 +-
 .../shuffle/BlockStoreShuffleReader.scala     |   5 +-
 .../spark/shuffle/ShuffleMemoryManager.scala  | 209 -----------
 .../shuffle/sort/SortShuffleManager.scala     |   1 -
 .../shuffle/sort/SortShuffleWriter.scala      |   6 +-
 .../collection/ExternalAppendOnlyMap.scala    |  49 ++-
 .../util/collection/ExternalSorter.scala      |   8 +-
 .../spark/util/collection/Spillable.scala     |  16 +-
 .../spark}/memory/TaskMemoryManagerSuite.java |  25 +-
 .../sort/PackedRecordPointerSuite.java        |  12 +-
 .../sort/ShuffleInMemorySorterSuite.java      |   9 +-
 .../sort/UnsafeShuffleWriterSuite.java        |  53 ++-
 .../map/AbstractBytesToBytesMapSuite.java     | 108 ++----
 .../map/BytesToBytesMapOffHeapSuite.java      |   7 +-
 .../map/BytesToBytesMapOnHeapSuite.java       |   7 +-
 .../sort/UnsafeExternalSorterSuite.java       |  34 +-
 .../sort/UnsafeInMemorySorterSuite.java       |  13 +-
 .../scala/org/apache/spark/FailureSuite.scala |   4 +-
 .../memory/GrantEverythingMemoryManager.scala |  51 +--
 .../spark/memory/MemoryManagerSuite.scala     | 134 +++++++
 .../spark/memory/MemoryTestingUtils.scala     |  37 ++
 .../memory/StaticMemoryManagerSuite.scala     |  24 +-
 .../memory/UnifiedMemoryManagerSuite.scala    |  26 +-
 .../shuffle/ShuffleMemoryManagerSuite.scala   | 326 ------------------
 .../BlockManagerReplicationSuite.scala        |   4 +-
 .../spark/storage/BlockManagerSuite.scala     |   8 +-
 .../ExternalAppendOnlyMapSuite.scala          |  60 ++--
 .../util/collection/ExternalSorterSuite.scala |  48 ++-
 .../execution/UnsafeExternalRowSorter.java    |   1 -
 .../UnsafeFixedWidthAggregationMap.java       |  12 +-
 .../sql/execution/UnsafeKVExternalSorter.java |  22 +-
 .../TungstenAggregationIterator.scala         |   9 +-
 .../datasources/WriterContainer.scala         |   3 +-
 .../sql/execution/joins/HashedRelation.scala  |  21 +-
 .../org/apache/spark/sql/execution/sort.scala |   5 +-
 .../UnsafeFixedWidthAggregationMapSuite.scala |  54 ++-
 .../UnsafeKVExternalSorterSuite.scala         |  19 +-
 .../execution/UnsafeRowSerializerSuite.scala  |  10 +-
 .../TungstenAggregationIteratorSuite.scala    |   4 +-
 .../streaming/ReceivedBlockHandlerSuite.scala |   2 +-
 .../unsafe/memory/ExecutorMemoryManager.java  | 111 ------
 .../unsafe/memory/HeapMemoryAllocator.java    |  51 ++-
 .../spark/unsafe/memory/MemoryBlock.java      |   5 +-
 58 files changed, 888 insertions(+), 1255 deletions(-)
 rename {unsafe/src/main/java/org/apache/spark/unsafe => core/src/main/java/org/apache/spark}/memory/TaskMemoryManager.java (78%)
 delete mode 100644 core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
 rename {unsafe/src/test/java/org/apache/spark/unsafe => core/src/test/java/org/apache/spark}/memory/TaskMemoryManagerSuite.java (74%)
 rename sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala => core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala (56%)
 create mode 100644 core/src/test/scala/org/apache/spark/memory/MemoryTestingUtils.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
 delete mode 100644 unsafe/src/main/java/org/apache/spark/unsafe/memory/ExecutorMemoryManager.java

diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/TaskMemoryManager.java b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
similarity index 78%
rename from unsafe/src/main/java/org/apache/spark/unsafe/memory/TaskMemoryManager.java
rename to core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
index 97b2c93f0dc3..7b31c90dac66 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/TaskMemoryManager.java
+++ b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.unsafe.memory;
+package org.apache.spark.memory;
 
 import java.util.*;
 
@@ -23,6 +23,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.apache.spark.unsafe.memory.MemoryBlock;
+
 /**
  * Manages the memory allocated by an individual task.
  * <p>
@@ -87,13 +89,9 @@ public class TaskMemoryManager {
    */
   private final BitSet allocatedPages = new BitSet(PAGE_TABLE_SIZE);
 
-  /**
-   * Tracks memory allocated with {@link TaskMemoryManager#allocate(long)}, used to detect / clean
-   * up leaked memory.
-   */
-  private final HashSet<MemoryBlock> allocatedNonPageMemory = new HashSet<MemoryBlock>();
+  private final MemoryManager memoryManager;
 
-  private final ExecutorMemoryManager executorMemoryManager;
+  private final long taskAttemptId;
 
   /**
    * Tracks whether we're in-heap or off-heap. For off-heap, we short-circuit most of these methods
@@ -103,16 +101,38 @@ public class TaskMemoryManager {
   private final boolean inHeap;
 
   /**
-   * Construct a new MemoryManager.
+   * Construct a new TaskMemoryManager.
    */
-  public TaskMemoryManager(ExecutorMemoryManager executorMemoryManager) {
-    this.inHeap = executorMemoryManager.inHeap;
-    this.executorMemoryManager = executorMemoryManager;
+  public TaskMemoryManager(MemoryManager memoryManager, long taskAttemptId) {
+    this.inHeap = memoryManager.tungstenMemoryIsAllocatedInHeap();
+    this.memoryManager = memoryManager;
+    this.taskAttemptId = taskAttemptId;
+  }
+
+  /**
+   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   * @return number of bytes successfully granted (<= N).
+   */
+  public long acquireExecutionMemory(long size) {
+    return memoryManager.acquireExecutionMemory(size, taskAttemptId);
+  }
+
+  /**
+   * Release N bytes of execution memory.
+   */
+  public void releaseExecutionMemory(long size) {
+    memoryManager.releaseExecutionMemory(size, taskAttemptId);
+  }
+
+  public long pageSizeBytes() {
+    return memoryManager.pageSizeBytes();
   }
 
   /**
    * Allocate a block of memory that will be tracked in the MemoryManager's page table; this is
-   * intended for allocating large blocks of memory that will be shared between operators.
+   * intended for allocating large blocks of Tungsten memory that will be shared between operators.
+   *
+   * Returns `null` if there was not enough memory to allocate the page.
    */
   public MemoryBlock allocatePage(long size) {
     if (size > MAXIMUM_PAGE_SIZE_BYTES) {
@@ -129,7 +149,15 @@ public MemoryBlock allocatePage(long size) {
       }
       allocatedPages.set(pageNumber);
     }
-    final MemoryBlock page = executorMemoryManager.allocate(size);
+    final long acquiredExecutionMemory = acquireExecutionMemory(size);
+    if (acquiredExecutionMemory != size) {
+      releaseExecutionMemory(acquiredExecutionMemory);
+      synchronized (this) {
+        allocatedPages.clear(pageNumber);
+      }
+      return null;
+    }
+    final MemoryBlock page = memoryManager.tungstenMemoryAllocator().allocate(size);
     page.pageNumber = pageNumber;
     pageTable[pageNumber] = page;
     if (logger.isTraceEnabled()) {
@@ -152,45 +180,16 @@ public void freePage(MemoryBlock page) {
     if (logger.isTraceEnabled()) {
       logger.trace("Freed page number {} ({} bytes)", page.pageNumber, page.size());
     }
-    // Cannot access a page once it's freed.
-    executorMemoryManager.free(page);
-  }
-
-  /**
-   * Allocates a contiguous block of memory. Note that the allocated memory is not guaranteed
-   * to be zeroed out (call `zero()` on the result if this is necessary). This method is intended
-   * to be used for allocating operators' internal data structures. For data pages that you want to
-   * exchange between operators, consider using {@link TaskMemoryManager#allocatePage(long)}, since
-   * that will enable intra-memory pointers (see
-   * {@link TaskMemoryManager#encodePageNumberAndOffset(MemoryBlock, long)} and this class's
-   * top-level Javadoc for more details).
-   */
-  public MemoryBlock allocate(long size) throws OutOfMemoryError {
-    assert(size > 0) : "Size must be positive, but got " + size;
-    final MemoryBlock memory = executorMemoryManager.allocate(size);
-    synchronized(allocatedNonPageMemory) {
-      allocatedNonPageMemory.add(memory);
-    }
-    return memory;
-  }
-
-  /**
-   * Free memory allocated by {@link TaskMemoryManager#allocate(long)}.
-   */
-  public void free(MemoryBlock memory) {
-    assert (memory.pageNumber == -1) : "Should call freePage() for pages, not free()";
-    executorMemoryManager.free(memory);
-    synchronized(allocatedNonPageMemory) {
-      final boolean wasAlreadyRemoved = !allocatedNonPageMemory.remove(memory);
-      assert (!wasAlreadyRemoved) : "Called free() on memory that was already freed!";
-    }
+    long pageSize = page.size();
+    memoryManager.tungstenMemoryAllocator().free(page);
+    releaseExecutionMemory(pageSize);
   }
 
   /**
    * Given a memory page and offset within that page, encode this address into a 64-bit long.
    * This address will remain valid as long as the corresponding page has not been freed.
    *
-   * @param page a data page allocated by {@link TaskMemoryManager#allocate(long)}.
+   * @param page a data page allocated by {@link TaskMemoryManager#allocatePage(long)}/
    * @param offsetInPage an offset in this page which incorporates the base offset. In other words,
    *                     this should be the value that you would pass as the base offset into an
    *                     UNSAFE call (e.g. page.baseOffset() + something).
@@ -270,17 +269,15 @@ public long cleanUpAllAllocatedMemory() {
       }
     }
 
-    synchronized (allocatedNonPageMemory) {
-      final Iterator<MemoryBlock> iter = allocatedNonPageMemory.iterator();
-      while (iter.hasNext()) {
-        final MemoryBlock memory = iter.next();
-        freedBytes += memory.size();
-        // We don't call free() here because that calls Set.remove, which would lead to a
-        // ConcurrentModificationException here.
-        executorMemoryManager.free(memory);
-        iter.remove();
-      }
-    }
+    freedBytes += memoryManager.releaseAllExecutionMemoryForTask(taskAttemptId);
+
     return freedBytes;
   }
+
+  /**
+   * Returns the memory consumption, in bytes, for the current task
+   */
+  public long getMemoryConsumptionForThisTask() {
+    return memoryManager.getExecutionMemoryUsageForTask(taskAttemptId);
+  }
 }
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java b/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
index c11711966fa8..f8f2b220e181 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/PackedRecordPointer.java
@@ -17,6 +17,8 @@
 
 package org.apache.spark.shuffle.sort;
 
+import org.apache.spark.memory.TaskMemoryManager;
+
 /**
  * Wrapper around an 8-byte word that holds a 24-bit partition number and 40-bit record pointer.
  * <p>
@@ -26,7 +28,7 @@
  * </pre>
  * This implies that the maximum addressable page size is 2^27 bits = 128 megabytes, assuming that
  * our offsets in pages are not 8-byte-word-aligned. Since we have 2^13 pages (based off the
- * 13-bit page numbers assigned by {@link org.apache.spark.unsafe.memory.TaskMemoryManager}), this
+ * 13-bit page numbers assigned by {@link TaskMemoryManager}), this
  * implies that we can address 2^13 * 128 megabytes = 1 terabyte of RAM per task.
  * <p>
  * Assuming word-alignment would allow for a 1 gigabyte maximum page size, but we leave this
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
index 85fdaa8115fa..f43236f41ae7 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
@@ -33,14 +33,13 @@
 import org.apache.spark.executor.ShuffleWriteMetrics;
 import org.apache.spark.serializer.DummySerializerInstance;
 import org.apache.spark.serializer.SerializerInstance;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.storage.DiskBlockObjectWriter;
 import org.apache.spark.storage.TempShuffleBlockId;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 /**
@@ -72,7 +71,6 @@ final class ShuffleExternalSorter {
   @VisibleForTesting
   final int maxRecordSizeBytes;
   private final TaskMemoryManager taskMemoryManager;
-  private final ShuffleMemoryManager shuffleMemoryManager;
   private final BlockManager blockManager;
   private final TaskContext taskContext;
   private final ShuffleWriteMetrics writeMetrics;
@@ -105,7 +103,6 @@ final class ShuffleExternalSorter {
 
   public ShuffleExternalSorter(
       TaskMemoryManager memoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       BlockManager blockManager,
       TaskContext taskContext,
       int initialSize,
@@ -113,7 +110,6 @@ public ShuffleExternalSorter(
       SparkConf conf,
       ShuffleWriteMetrics writeMetrics) throws IOException {
     this.taskMemoryManager = memoryManager;
-    this.shuffleMemoryManager = shuffleMemoryManager;
     this.blockManager = blockManager;
     this.taskContext = taskContext;
     this.initialSize = initialSize;
@@ -124,7 +120,7 @@ public ShuffleExternalSorter(
     this.numElementsForSpillThreshold =
       conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MAX_VALUE);
     this.pageSizeBytes = (int) Math.min(
-      PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES, shuffleMemoryManager.pageSizeBytes());
+      PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES, taskMemoryManager.pageSizeBytes());
     this.maxRecordSizeBytes = pageSizeBytes - 4;
     this.writeMetrics = writeMetrics;
     initializeForWriting();
@@ -140,9 +136,9 @@ public ShuffleExternalSorter(
   private void initializeForWriting() throws IOException {
     // TODO: move this sizing calculation logic into a static method of sorter:
     final long memoryRequested = initialSize * 8L;
-    final long memoryAcquired = shuffleMemoryManager.tryToAcquire(memoryRequested);
+    final long memoryAcquired = taskMemoryManager.acquireExecutionMemory(memoryRequested);
     if (memoryAcquired != memoryRequested) {
-      shuffleMemoryManager.release(memoryAcquired);
+      taskMemoryManager.releaseExecutionMemory(memoryAcquired);
       throw new IOException("Could not acquire " + memoryRequested + " bytes of memory");
     }
 
@@ -272,6 +268,7 @@ private void writeSortedFile(boolean isLastFile) throws IOException {
    */
   @VisibleForTesting
   void spill() throws IOException {
+    assert(inMemSorter != null);
     logger.info("Thread {} spilling sort data of {} to disk ({} {} so far)",
       Thread.currentThread().getId(),
       Utils.bytesToString(getMemoryUsage()),
@@ -281,7 +278,7 @@ void spill() throws IOException {
     writeSortedFile(false);
     final long inMemSorterMemoryUsage = inMemSorter.getMemoryUsage();
     inMemSorter = null;
-    shuffleMemoryManager.release(inMemSorterMemoryUsage);
+    taskMemoryManager.releaseExecutionMemory(inMemSorterMemoryUsage);
     final long spillSize = freeMemory();
     taskContext.taskMetrics().incMemoryBytesSpilled(spillSize);
 
@@ -316,9 +313,13 @@ private long freeMemory() {
     long memoryFreed = 0;
     for (MemoryBlock block : allocatedPages) {
       taskMemoryManager.freePage(block);
-      shuffleMemoryManager.release(block.size());
       memoryFreed += block.size();
     }
+    if (inMemSorter != null) {
+      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
+      inMemSorter = null;
+      taskMemoryManager.releaseExecutionMemory(sorterMemoryUsage);
+    }
     allocatedPages.clear();
     currentPage = null;
     currentPagePosition = -1;
@@ -337,8 +338,9 @@ public void cleanupResources() {
       }
     }
     if (inMemSorter != null) {
-      shuffleMemoryManager.release(inMemSorter.getMemoryUsage());
+      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
       inMemSorter = null;
+      taskMemoryManager.releaseExecutionMemory(sorterMemoryUsage);
     }
   }
 
@@ -353,21 +355,20 @@ private void growPointerArrayIfNecessary() throws IOException {
       logger.debug("Attempting to expand sort pointer array");
       final long oldPointerArrayMemoryUsage = inMemSorter.getMemoryUsage();
       final long memoryToGrowPointerArray = oldPointerArrayMemoryUsage * 2;
-      final long memoryAcquired = shuffleMemoryManager.tryToAcquire(memoryToGrowPointerArray);
+      final long memoryAcquired = taskMemoryManager.acquireExecutionMemory(memoryToGrowPointerArray);
       if (memoryAcquired < memoryToGrowPointerArray) {
-        shuffleMemoryManager.release(memoryAcquired);
+        taskMemoryManager.releaseExecutionMemory(memoryAcquired);
         spill();
       } else {
         inMemSorter.expandPointerArray();
-        shuffleMemoryManager.release(oldPointerArrayMemoryUsage);
+        taskMemoryManager.releaseExecutionMemory(oldPointerArrayMemoryUsage);
       }
     }
   }
-  
+
   /**
    * Allocates more memory in order to insert an additional record. This will request additional
-   * memory from the {@link ShuffleMemoryManager} and spill if the requested memory can not be
-   * obtained.
+   * memory from the memory manager and spill if the requested memory can not be obtained.
    *
    * @param requiredSpace the required space in the data page, in bytes, including space for storing
    *                      the record size. This must be less than or equal to the page size (records
@@ -386,17 +387,14 @@ private void acquireNewPageIfNecessary(int requiredSpace) throws IOException {
         throw new IOException("Required space " + requiredSpace + " is greater than page size (" +
           pageSizeBytes + ")");
       } else {
-        final long memoryAcquired = shuffleMemoryManager.tryToAcquire(pageSizeBytes);
-        if (memoryAcquired < pageSizeBytes) {
-          shuffleMemoryManager.release(memoryAcquired);
+        currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
+        if (currentPage == null) {
           spill();
-          final long memoryAcquiredAfterSpilling = shuffleMemoryManager.tryToAcquire(pageSizeBytes);
-          if (memoryAcquiredAfterSpilling != pageSizeBytes) {
-            shuffleMemoryManager.release(memoryAcquiredAfterSpilling);
+          currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
+          if (currentPage == null) {
             throw new IOException("Unable to acquire " + pageSizeBytes + " bytes of memory");
           }
         }
-        currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
         currentPagePosition = currentPage.getBaseOffset();
         freeSpaceInCurrentPage = pageSizeBytes;
         allocatedPages.add(currentPage);
@@ -430,17 +428,14 @@ public void insertRecord(
       long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
       // The record is larger than the page size, so allocate a special overflow page just to hold
       // that record.
-      final long memoryGranted = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-      if (memoryGranted != overflowPageSize) {
-        shuffleMemoryManager.release(memoryGranted);
+      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+      if (overflowPage == null) {
         spill();
-        final long memoryGrantedAfterSpill = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-        if (memoryGrantedAfterSpill != overflowPageSize) {
-          shuffleMemoryManager.release(memoryGrantedAfterSpill);
+        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+        if (overflowPage == null) {
           throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
         }
       }
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
       allocatedPages.add(overflowPage);
       dataPage = overflowPage;
       dataPagePosition = overflowPage.getBaseOffset();
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
index e8f050cb2dab..f6c5c944bd77 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
@@ -49,12 +49,11 @@
 import org.apache.spark.serializer.Serializer;
 import org.apache.spark.serializer.SerializerInstance;
 import org.apache.spark.shuffle.IndexShuffleBlockResolver;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.shuffle.ShuffleWriter;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.storage.TimeTrackingOutputStream;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 @Private
 public class UnsafeShuffleWriter<K, V> extends ShuffleWriter<K, V> {
@@ -69,7 +68,6 @@ public class UnsafeShuffleWriter<K, V> extends ShuffleWriter<K, V> {
   private final BlockManager blockManager;
   private final IndexShuffleBlockResolver shuffleBlockResolver;
   private final TaskMemoryManager memoryManager;
-  private final ShuffleMemoryManager shuffleMemoryManager;
   private final SerializerInstance serializer;
   private final Partitioner partitioner;
   private final ShuffleWriteMetrics writeMetrics;
@@ -103,7 +101,6 @@ public UnsafeShuffleWriter(
       BlockManager blockManager,
       IndexShuffleBlockResolver shuffleBlockResolver,
       TaskMemoryManager memoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       SerializedShuffleHandle<K, V> handle,
       int mapId,
       TaskContext taskContext,
@@ -117,7 +114,6 @@ public UnsafeShuffleWriter(
     this.blockManager = blockManager;
     this.shuffleBlockResolver = shuffleBlockResolver;
     this.memoryManager = memoryManager;
-    this.shuffleMemoryManager = shuffleMemoryManager;
     this.mapId = mapId;
     final ShuffleDependency<K, V, V> dep = handle.dependency();
     this.shuffleId = dep.shuffleId();
@@ -197,7 +193,6 @@ private void open() throws IOException {
     assert (sorter == null);
     sorter = new ShuffleExternalSorter(
       memoryManager,
-      shuffleMemoryManager,
       blockManager,
       taskContext,
       INITIAL_SORT_BUFFER_SIZE,
diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index b24eed3952fd..f035bdac810b 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -26,7 +26,6 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.array.LongArray;
@@ -34,7 +33,7 @@
 import org.apache.spark.unsafe.hash.Murmur3_x86_32;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.unsafe.memory.MemoryLocation;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 /**
  * An append-only hash map where keys and values are contiguous regions of bytes.
@@ -70,8 +69,6 @@ public final class BytesToBytesMap {
 
   private final TaskMemoryManager taskMemoryManager;
 
-  private final ShuffleMemoryManager shuffleMemoryManager;
-
   /**
    * A linked list for tracking all allocated data pages so that we can free all of our memory.
    */
@@ -169,13 +166,11 @@ public final class BytesToBytesMap {
 
   public BytesToBytesMap(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       int initialCapacity,
       double loadFactor,
       long pageSizeBytes,
       boolean enablePerfMetrics) {
     this.taskMemoryManager = taskMemoryManager;
-    this.shuffleMemoryManager = shuffleMemoryManager;
     this.loadFactor = loadFactor;
     this.loc = new Location();
     this.pageSizeBytes = pageSizeBytes;
@@ -201,21 +196,18 @@ public BytesToBytesMap(
 
   public BytesToBytesMap(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       int initialCapacity,
       long pageSizeBytes) {
-    this(taskMemoryManager, shuffleMemoryManager, initialCapacity, 0.70, pageSizeBytes, false);
+    this(taskMemoryManager, initialCapacity, 0.70, pageSizeBytes, false);
   }
 
   public BytesToBytesMap(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       int initialCapacity,
       long pageSizeBytes,
       boolean enablePerfMetrics) {
     this(
       taskMemoryManager,
-      shuffleMemoryManager,
       initialCapacity,
       0.70,
       pageSizeBytes,
@@ -260,7 +252,6 @@ private void advanceToNextPage() {
       if (destructive && currentPage != null) {
         dataPagesIterator.remove();
         this.bmap.taskMemoryManager.freePage(currentPage);
-        this.bmap.shuffleMemoryManager.release(currentPage.size());
       }
       currentPage = dataPagesIterator.next();
       pageBaseObject = currentPage.getBaseObject();
@@ -572,14 +563,12 @@ public boolean putNewKey(
       if (useOverflowPage) {
         // The record is larger than the page size, so allocate a special overflow page just to hold
         // that record.
-        final long memoryRequested = requiredSize + 8;
-        final long memoryGranted = shuffleMemoryManager.tryToAcquire(memoryRequested);
-        if (memoryGranted != memoryRequested) {
-          shuffleMemoryManager.release(memoryGranted);
-          logger.debug("Failed to acquire {} bytes of memory", memoryRequested);
+        final long overflowPageSize = requiredSize + 8;
+        MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+        if (overflowPage == null) {
+          logger.debug("Failed to acquire {} bytes of memory", overflowPageSize);
           return false;
         }
-        MemoryBlock overflowPage = taskMemoryManager.allocatePage(memoryRequested);
         dataPages.add(overflowPage);
         dataPage = overflowPage;
         dataPageBaseObject = overflowPage.getBaseObject();
@@ -655,17 +644,15 @@ public boolean putNewKey(
   }
 
   /**
-   * Acquire a new page from the {@link ShuffleMemoryManager}.
+   * Acquire a new page from the memory manager.
    * @return whether there is enough space to allocate the new page.
    */
   private boolean acquireNewPage() {
-    final long memoryGranted = shuffleMemoryManager.tryToAcquire(pageSizeBytes);
-    if (memoryGranted != pageSizeBytes) {
-      shuffleMemoryManager.release(memoryGranted);
+    MemoryBlock newPage = taskMemoryManager.allocatePage(pageSizeBytes);
+    if (newPage == null) {
       logger.debug("Failed to acquire {} bytes of memory", pageSizeBytes);
       return false;
     }
-    MemoryBlock newPage = taskMemoryManager.allocatePage(pageSizeBytes);
     dataPages.add(newPage);
     pageCursor = 0;
     currentDataPage = newPage;
@@ -705,7 +692,6 @@ public void free() {
       MemoryBlock dataPage = dataPagesIterator.next();
       dataPagesIterator.remove();
       taskMemoryManager.freePage(dataPage);
-      shuffleMemoryManager.release(dataPage.size());
     }
     assert(dataPages.isEmpty());
   }
@@ -714,10 +700,6 @@ public TaskMemoryManager getTaskMemoryManager() {
     return taskMemoryManager;
   }
 
-  public ShuffleMemoryManager getShuffleMemoryManager() {
-    return shuffleMemoryManager;
-  }
-
   public long getPageSizeBytes() {
     return pageSizeBytes;
   }
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/RecordPointerAndKeyPrefix.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/RecordPointerAndKeyPrefix.java
index 0c4ebde407cf..dbf6770e0739 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/RecordPointerAndKeyPrefix.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/RecordPointerAndKeyPrefix.java
@@ -17,9 +17,11 @@
 
 package org.apache.spark.util.collection.unsafe.sort;
 
+import org.apache.spark.memory.TaskMemoryManager;
+
 final class RecordPointerAndKeyPrefix {
   /**
-   * A pointer to a record; see {@link org.apache.spark.unsafe.memory.TaskMemoryManager} for a
+   * A pointer to a record; see {@link TaskMemoryManager} for a
    * description of how these addresses are encoded.
    */
   public long recordPointer;
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index 0a311d2d935a..e317ea391c55 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -32,12 +32,11 @@
 
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 /**
@@ -52,7 +51,6 @@ public final class UnsafeExternalSorter {
   private final RecordComparator recordComparator;
   private final int initialSize;
   private final TaskMemoryManager taskMemoryManager;
-  private final ShuffleMemoryManager shuffleMemoryManager;
   private final BlockManager blockManager;
   private final TaskContext taskContext;
   private ShuffleWriteMetrics writeMetrics;
@@ -82,7 +80,6 @@ public final class UnsafeExternalSorter {
 
   public static UnsafeExternalSorter createWithExistingInMemorySorter(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       BlockManager blockManager,
       TaskContext taskContext,
       RecordComparator recordComparator,
@@ -90,26 +87,24 @@ public static UnsafeExternalSorter createWithExistingInMemorySorter(
       int initialSize,
       long pageSizeBytes,
       UnsafeInMemorySorter inMemorySorter) throws IOException {
-    return new UnsafeExternalSorter(taskMemoryManager, shuffleMemoryManager, blockManager,
+    return new UnsafeExternalSorter(taskMemoryManager, blockManager,
       taskContext, recordComparator, prefixComparator, initialSize, pageSizeBytes, inMemorySorter);
   }
 
   public static UnsafeExternalSorter create(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       BlockManager blockManager,
       TaskContext taskContext,
       RecordComparator recordComparator,
       PrefixComparator prefixComparator,
       int initialSize,
       long pageSizeBytes) throws IOException {
-    return new UnsafeExternalSorter(taskMemoryManager, shuffleMemoryManager, blockManager,
+    return new UnsafeExternalSorter(taskMemoryManager, blockManager,
       taskContext, recordComparator, prefixComparator, initialSize, pageSizeBytes, null);
   }
 
   private UnsafeExternalSorter(
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       BlockManager blockManager,
       TaskContext taskContext,
       RecordComparator recordComparator,
@@ -118,7 +113,6 @@ private UnsafeExternalSorter(
       long pageSizeBytes,
       @Nullable UnsafeInMemorySorter existingInMemorySorter) throws IOException {
     this.taskMemoryManager = taskMemoryManager;
-    this.shuffleMemoryManager = shuffleMemoryManager;
     this.blockManager = blockManager;
     this.taskContext = taskContext;
     this.recordComparator = recordComparator;
@@ -261,7 +255,6 @@ private long freeMemory() {
     long memoryFreed = 0;
     for (MemoryBlock block : allocatedPages) {
       taskMemoryManager.freePage(block);
-      shuffleMemoryManager.release(block.size());
       memoryFreed += block.size();
     }
     // TODO: track in-memory sorter memory usage (SPARK-10474)
@@ -309,8 +302,7 @@ private void growPointerArrayIfNecessary() throws IOException {
 
   /**
    * Allocates more memory in order to insert an additional record. This will request additional
-   * memory from the {@link ShuffleMemoryManager} and spill if the requested memory can not be
-   * obtained.
+   * memory from the memory manager and spill if the requested memory can not be obtained.
    *
    * @param requiredSpace the required space in the data page, in bytes, including space for storing
    *                      the record size. This must be less than or equal to the page size (records
@@ -335,23 +327,20 @@ private void acquireNewPageIfNecessary(int requiredSpace) throws IOException {
   }
 
   /**
-   * Acquire a new page from the {@link ShuffleMemoryManager}.
+   * Acquire a new page from the memory manager.
    *
    * If there is not enough space to allocate the new page, spill all existing ones
    * and try again. If there is still not enough space, report error to the caller.
    */
   private void acquireNewPage() throws IOException {
-    final long memoryAcquired = shuffleMemoryManager.tryToAcquire(pageSizeBytes);
-    if (memoryAcquired < pageSizeBytes) {
-      shuffleMemoryManager.release(memoryAcquired);
+    currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
+    if (currentPage == null) {
       spill();
-      final long memoryAcquiredAfterSpilling = shuffleMemoryManager.tryToAcquire(pageSizeBytes);
-      if (memoryAcquiredAfterSpilling != pageSizeBytes) {
-        shuffleMemoryManager.release(memoryAcquiredAfterSpilling);
+      currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
+      if (currentPage == null) {
         throw new IOException("Unable to acquire " + pageSizeBytes + " bytes of memory");
       }
     }
-    currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
     currentPagePosition = currentPage.getBaseOffset();
     freeSpaceInCurrentPage = pageSizeBytes;
     allocatedPages.add(currentPage);
@@ -379,17 +368,14 @@ public void insertRecord(
       long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
       // The record is larger than the page size, so allocate a special overflow page just to hold
       // that record.
-      final long memoryGranted = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-      if (memoryGranted != overflowPageSize) {
-        shuffleMemoryManager.release(memoryGranted);
+      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+      if (overflowPage == null) {
         spill();
-        final long memoryGrantedAfterSpill = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-        if (memoryGrantedAfterSpill != overflowPageSize) {
-          shuffleMemoryManager.release(memoryGrantedAfterSpill);
+        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+        if (overflowPage == null) {
           throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
         }
       }
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
       allocatedPages.add(overflowPage);
       dataPage = overflowPage;
       dataPagePosition = overflowPage.getBaseOffset();
@@ -441,17 +427,14 @@ public void insertKVRecord(
       long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
       // The record is larger than the page size, so allocate a special overflow page just to hold
       // that record.
-      final long memoryGranted = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-      if (memoryGranted != overflowPageSize) {
-        shuffleMemoryManager.release(memoryGranted);
+      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+      if (overflowPage == null) {
         spill();
-        final long memoryGrantedAfterSpill = shuffleMemoryManager.tryToAcquire(overflowPageSize);
-        if (memoryGrantedAfterSpill != overflowPageSize) {
-          shuffleMemoryManager.release(memoryGrantedAfterSpill);
+        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
+        if (overflowPage == null) {
           throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
         }
       }
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
       allocatedPages.add(overflowPage);
       dataPage = overflowPage;
       dataPagePosition = overflowPage.getBaseOffset();
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
index f7787e1019c2..5aad72c374c3 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
@@ -21,7 +21,7 @@
 
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.util.collection.Sorter;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 /**
  * Sorts records using an AlphaSort-style key-prefix sort. This sort stores pointers to records
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index b5c35c569e45..398e0936906a 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -38,9 +38,8 @@ import org.apache.spark.rpc.akka.AkkaRpcEnv
 import org.apache.spark.scheduler.{OutputCommitCoordinator, LiveListenerBus}
 import org.apache.spark.scheduler.OutputCommitCoordinator.OutputCommitCoordinatorEndpoint
 import org.apache.spark.serializer.Serializer
-import org.apache.spark.shuffle.{ShuffleMemoryManager, ShuffleManager}
+import org.apache.spark.shuffle.ShuffleManager
 import org.apache.spark.storage._
-import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator}
 import org.apache.spark.util.{AkkaUtils, RpcUtils, Utils}
 
 /**
@@ -70,10 +69,7 @@ class SparkEnv (
     val httpFileServer: HttpFileServer,
     val sparkFilesDir: String,
     val metricsSystem: MetricsSystem,
-    // TODO: unify these *MemoryManager classes (SPARK-10984)
     val memoryManager: MemoryManager,
-    val shuffleMemoryManager: ShuffleMemoryManager,
-    val executorMemoryManager: ExecutorMemoryManager,
     val outputCommitCoordinator: OutputCommitCoordinator,
     val conf: SparkConf) extends Logging {
 
@@ -340,13 +336,11 @@ object SparkEnv extends Logging {
     val useLegacyMemoryManager = conf.getBoolean("spark.memory.useLegacyMode", false)
     val memoryManager: MemoryManager =
       if (useLegacyMemoryManager) {
-        new StaticMemoryManager(conf)
+        new StaticMemoryManager(conf, numUsableCores)
       } else {
-        new UnifiedMemoryManager(conf)
+        new UnifiedMemoryManager(conf, numUsableCores)
       }
 
-    val shuffleMemoryManager = ShuffleMemoryManager.create(conf, memoryManager, numUsableCores)
-
     val blockTransferService = new NettyBlockTransferService(conf, securityManager, numUsableCores)
 
     val blockManagerMaster = new BlockManagerMaster(registerOrLookupEndpoint(
@@ -405,15 +399,6 @@ object SparkEnv extends Logging {
       new OutputCommitCoordinatorEndpoint(rpcEnv, outputCommitCoordinator))
     outputCommitCoordinator.coordinatorRef = Some(outputCommitCoordinatorRef)
 
-    val executorMemoryManager: ExecutorMemoryManager = {
-      val allocator = if (conf.getBoolean("spark.unsafe.offHeap", false)) {
-        MemoryAllocator.UNSAFE
-      } else {
-        MemoryAllocator.HEAP
-      }
-      new ExecutorMemoryManager(allocator)
-    }
-
     val envInstance = new SparkEnv(
       executorId,
       rpcEnv,
@@ -431,8 +416,6 @@ object SparkEnv extends Logging {
       sparkFilesDir,
       metricsSystem,
       memoryManager,
-      shuffleMemoryManager,
-      executorMemoryManager,
       outputCommitCoordinator,
       conf)
 
diff --git a/core/src/main/scala/org/apache/spark/TaskContext.scala b/core/src/main/scala/org/apache/spark/TaskContext.scala
index 63cca80b2d73..af558d6e5b47 100644
--- a/core/src/main/scala/org/apache/spark/TaskContext.scala
+++ b/core/src/main/scala/org/apache/spark/TaskContext.scala
@@ -21,8 +21,8 @@ import java.io.Serializable
 
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.executor.TaskMetrics
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.metrics.source.Source
-import org.apache.spark.unsafe.memory.TaskMemoryManager
 import org.apache.spark.util.TaskCompletionListener
 
 
diff --git a/core/src/main/scala/org/apache/spark/TaskContextImpl.scala b/core/src/main/scala/org/apache/spark/TaskContextImpl.scala
index 5df94c6d3a10..f0ae83a9341b 100644
--- a/core/src/main/scala/org/apache/spark/TaskContextImpl.scala
+++ b/core/src/main/scala/org/apache/spark/TaskContextImpl.scala
@@ -20,9 +20,9 @@ package org.apache.spark
 import scala.collection.mutable.{ArrayBuffer, HashMap}
 
 import org.apache.spark.executor.TaskMetrics
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.metrics.MetricsSystem
 import org.apache.spark.metrics.source.Source
-import org.apache.spark.unsafe.memory.TaskMemoryManager
 import org.apache.spark.util.{TaskCompletionListener, TaskCompletionListenerException}
 
 private[spark] class TaskContextImpl(
diff --git a/core/src/main/scala/org/apache/spark/executor/Executor.scala b/core/src/main/scala/org/apache/spark/executor/Executor.scala
index c3491bb8b1cf..9e88d488c037 100644
--- a/core/src/main/scala/org/apache/spark/executor/Executor.scala
+++ b/core/src/main/scala/org/apache/spark/executor/Executor.scala
@@ -29,10 +29,10 @@ import scala.util.control.NonFatal
 
 import org.apache.spark._
 import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.scheduler.{DirectTaskResult, IndirectTaskResult, Task}
 import org.apache.spark.shuffle.FetchFailedException
 import org.apache.spark.storage.{StorageLevel, TaskResultBlockId}
-import org.apache.spark.unsafe.memory.TaskMemoryManager
 import org.apache.spark.util._
 
 /**
@@ -179,7 +179,7 @@ private[spark] class Executor(
     }
 
     override def run(): Unit = {
-      val taskMemoryManager = new TaskMemoryManager(env.executorMemoryManager)
+      val taskMemoryManager = new TaskMemoryManager(env.memoryManager, taskId)
       val deserializeStartTime = System.currentTimeMillis()
       Thread.currentThread.setContextClassLoader(replClassLoader)
       val ser = env.closureSerializer.newInstance()
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
index 7168ac549106..6c9a71c3855b 100644
--- a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
@@ -17,20 +17,38 @@
 
 package org.apache.spark.memory
 
+import javax.annotation.concurrent.GuardedBy
+
 import scala.collection.mutable
+import scala.collection.mutable.ArrayBuffer
 
-import org.apache.spark.Logging
-import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
+import com.google.common.annotations.VisibleForTesting
 
+import org.apache.spark.{SparkException, TaskContext, SparkConf, Logging}
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
+import org.apache.spark.unsafe.array.ByteArrayMethods
+import org.apache.spark.unsafe.memory.MemoryAllocator
 
 /**
  * An abstract memory manager that enforces how memory is shared between execution and storage.
  *
  * In this context, execution memory refers to that used for computation in shuffles, joins,
  * sorts and aggregations, while storage memory refers to that used for caching and propagating
- * internal data across the cluster. There exists one of these per JVM.
+ * internal data across the cluster. There exists one MemoryManager per JVM.
+ *
+ * The MemoryManager abstract base class itself implements policies for sharing execution memory
+ * between tasks; it tries to ensure that each task gets a reasonable share of memory, instead of
+ * some task ramping up to a large amount first and then causing others to spill to disk repeatedly.
+ * If there are N tasks, it ensures that each task can acquire at least 1 / 2N of the memory
+ * before it has to spill, and at most 1 / N. Because N varies dynamically, we keep track of the
+ * set of active tasks and redo the calculations of 1 / 2N and 1 / N in waiting tasks whenever
+ * this set changes. This is all done by synchronizing access to mutable state and using wait() and
+ * notifyAll() to signal changes to callers. Prior to Spark 1.6, this arbitration of memory across
+ * tasks was performed by the ShuffleMemoryManager.
  */
-private[spark] abstract class MemoryManager extends Logging {
+private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) extends Logging {
+
+  // -- Methods related to memory allocation policies and bookkeeping ------------------------------
 
   // The memory store used to evict cached blocks
   private var _memoryStore: MemoryStore = _
@@ -42,8 +60,10 @@ private[spark] abstract class MemoryManager extends Logging {
   }
 
   // Amount of execution/storage memory in use, accesses must be synchronized on `this`
-  protected var _executionMemoryUsed: Long = 0
-  protected var _storageMemoryUsed: Long = 0
+  @GuardedBy("this") protected var _executionMemoryUsed: Long = 0
+  @GuardedBy("this") protected var _storageMemoryUsed: Long = 0
+  // Map from taskAttemptId -> memory consumption in bytes
+  @GuardedBy("this") private val executionMemoryForTask = new mutable.HashMap[Long, Long]()
 
   /**
    * Set the [[MemoryStore]] used by this manager to evict cached blocks.
@@ -65,15 +85,6 @@ private[spark] abstract class MemoryManager extends Logging {
 
   // TODO: avoid passing evicted blocks around to simplify method signatures (SPARK-10985)
 
-  /**
-   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
-   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
-   * @return number of bytes successfully granted (<= N).
-   */
-  def acquireExecutionMemory(
-      numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long
-
   /**
    * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
    * Blocks evicted in the process, if any, are added to `evictedBlocks`.
@@ -102,9 +113,92 @@ private[spark] abstract class MemoryManager extends Logging {
   }
 
   /**
-   * Release N bytes of execution memory.
+   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return number of bytes successfully granted (<= N).
+   */
+  @VisibleForTesting
+  private[memory] def doAcquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long
+
+  /**
+   * Try to acquire up to `numBytes` of execution memory for the current task and return the number
+   * of bytes obtained, or 0 if none can be allocated.
+   *
+   * This call may block until there is enough free memory in some situations, to make sure each
+   * task has a chance to ramp up to at least 1 / 2N of the total memory pool (where N is the # of
+   * active tasks) before it is forced to spill. This can happen if the number of tasks increase
+   * but an older task had a lot of memory already.
+   *
+   * Subclasses should override `doAcquireExecutionMemory` in order to customize the policies
+   * that control global sharing of memory between execution and storage.
    */
-  def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
+  private[memory]
+  final def acquireExecutionMemory(numBytes: Long, taskAttemptId: Long): Long = synchronized {
+    assert(numBytes > 0, "invalid number of bytes requested: " + numBytes)
+
+    // Add this task to the taskMemory map just so we can keep an accurate count of the number
+    // of active tasks, to let other tasks ramp down their memory in calls to tryToAcquire
+    if (!executionMemoryForTask.contains(taskAttemptId)) {
+      executionMemoryForTask(taskAttemptId) = 0L
+      // This will later cause waiting tasks to wake up and check numTasks again
+      notifyAll()
+    }
+
+    // Once the cross-task memory allocation policy has decided to grant more memory to a task,
+    // this method is called in order to actually obtain that execution memory, potentially
+    // triggering eviction of storage memory:
+    def acquire(toGrant: Long): Long = synchronized {
+      val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+      val acquired = doAcquireExecutionMemory(toGrant, evictedBlocks)
+      // Register evicted blocks, if any, with the active task metrics
+      Option(TaskContext.get()).foreach { tc =>
+        val metrics = tc.taskMetrics()
+        val lastUpdatedBlocks = metrics.updatedBlocks.getOrElse(Seq[(BlockId, BlockStatus)]())
+        metrics.updatedBlocks = Some(lastUpdatedBlocks ++ evictedBlocks.toSeq)
+      }
+      executionMemoryForTask(taskAttemptId) += acquired
+      acquired
+    }
+
+    // Keep looping until we're either sure that we don't want to grant this request (because this
+    // task would have more than 1 / numActiveTasks of the memory) or we have enough free
+    // memory to give it (we always let each task get at least 1 / (2 * numActiveTasks)).
+    // TODO: simplify this to limit each task to its own slot
+    while (true) {
+      val numActiveTasks = executionMemoryForTask.keys.size
+      val curMem = executionMemoryForTask(taskAttemptId)
+      val freeMemory = maxExecutionMemory - executionMemoryForTask.values.sum
+
+      // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
+      // don't let it be negative
+      val maxToGrant =
+        math.min(numBytes, math.max(0, (maxExecutionMemory / numActiveTasks) - curMem))
+      // Only give it as much memory as is free, which might be none if it reached 1 / numTasks
+      val toGrant = math.min(maxToGrant, freeMemory)
+
+      if (curMem < maxExecutionMemory / (2 * numActiveTasks)) {
+        // We want to let each task get at least 1 / (2 * numActiveTasks) before blocking;
+        // if we can't give it this much now, wait for other tasks to free up memory
+        // (this happens if older tasks allocated lots of memory before N grew)
+        if (
+          freeMemory >= math.min(maxToGrant, maxExecutionMemory / (2 * numActiveTasks) - curMem)) {
+          return acquire(toGrant)
+        } else {
+          logInfo(
+            s"TID $taskAttemptId waiting for at least 1/2N of execution memory pool to be free")
+          wait()
+        }
+      } else {
+        return acquire(toGrant)
+      }
+    }
+    0L  // Never reached
+  }
+
+  @VisibleForTesting
+  private[memory] def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
     if (numBytes > _executionMemoryUsed) {
       logWarning(s"Attempted to release $numBytes bytes of execution " +
         s"memory when we only have ${_executionMemoryUsed} bytes")
@@ -114,6 +208,36 @@ private[spark] abstract class MemoryManager extends Logging {
     }
   }
 
+  /**
+   * Release numBytes of execution memory belonging to the given task.
+   */
+  private[memory]
+  final def releaseExecutionMemory(numBytes: Long, taskAttemptId: Long): Unit = synchronized {
+    val curMem = executionMemoryForTask.getOrElse(taskAttemptId, 0L)
+    if (curMem < numBytes) {
+      throw new SparkException(
+        s"Internal error: release called on $numBytes bytes but task only has $curMem")
+    }
+    if (executionMemoryForTask.contains(taskAttemptId)) {
+      executionMemoryForTask(taskAttemptId) -= numBytes
+      if (executionMemoryForTask(taskAttemptId) <= 0) {
+        executionMemoryForTask.remove(taskAttemptId)
+      }
+      releaseExecutionMemory(numBytes)
+    }
+    notifyAll() // Notify waiters in acquireExecutionMemory() that memory has been freed
+  }
+
+  /**
+   * Release all memory for the given task and mark it as inactive (e.g. when a task ends).
+   * @return the number of bytes freed.
+   */
+  private[memory] def releaseAllExecutionMemoryForTask(taskAttemptId: Long): Long = synchronized {
+    val numBytesToFree = getExecutionMemoryUsageForTask(taskAttemptId)
+    releaseExecutionMemory(numBytesToFree, taskAttemptId)
+    numBytesToFree
+  }
+
   /**
    * Release N bytes of storage memory.
    */
@@ -155,4 +279,43 @@ private[spark] abstract class MemoryManager extends Logging {
     _storageMemoryUsed
   }
 
+  /**
+   * Returns the execution memory consumption, in bytes, for the given task.
+   */
+  private[memory] def getExecutionMemoryUsageForTask(taskAttemptId: Long): Long = synchronized {
+    executionMemoryForTask.getOrElse(taskAttemptId, 0L)
+  }
+
+  // -- Fields related to Tungsten managed memory -------------------------------------------------
+
+  /**
+   * The default page size, in bytes.
+   *
+   * If user didn't explicitly set "spark.buffer.pageSize", we figure out the default value
+   * by looking at the number of cores available to the process, and the total amount of memory,
+   * and then divide it by a factor of safety.
+   */
+  val pageSizeBytes: Long = {
+    val minPageSize = 1L * 1024 * 1024   // 1MB
+    val maxPageSize = 64L * minPageSize  // 64MB
+    val cores = if (numCores > 0) numCores else Runtime.getRuntime.availableProcessors()
+    // Because of rounding to next power of 2, we may have safetyFactor as 8 in worst case
+    val safetyFactor = 16
+    val size = ByteArrayMethods.nextPowerOf2(maxExecutionMemory / cores / safetyFactor)
+    val default = math.min(maxPageSize, math.max(minPageSize, size))
+    conf.getSizeAsBytes("spark.buffer.pageSize", default)
+  }
+
+  /**
+   * Tracks whether Tungsten memory will be allocated on the JVM heap or off-heap using
+   * sun.misc.Unsafe.
+   */
+  final val tungstenMemoryIsAllocatedInHeap: Boolean =
+    !conf.getBoolean("spark.unsafe.offHeap", false)
+
+  /**
+   * Allocates memory for use by Unsafe/Tungsten code.
+   */
+  private[memory] final val tungstenMemoryAllocator: MemoryAllocator =
+    if (tungstenMemoryIsAllocatedInHeap) MemoryAllocator.HEAP else MemoryAllocator.UNSAFE
 }
diff --git a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
index fa44f3723415..9c2c2e90a228 100644
--- a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
@@ -33,14 +33,16 @@ import org.apache.spark.storage.{BlockId, BlockStatus}
 private[spark] class StaticMemoryManager(
     conf: SparkConf,
     override val maxExecutionMemory: Long,
-    override val maxStorageMemory: Long)
-  extends MemoryManager {
+    override val maxStorageMemory: Long,
+    numCores: Int)
+  extends MemoryManager(conf, numCores) {
 
-  def this(conf: SparkConf) {
+  def this(conf: SparkConf, numCores: Int) {
     this(
       conf,
       StaticMemoryManager.getMaxExecutionMemory(conf),
-      StaticMemoryManager.getMaxStorageMemory(conf))
+      StaticMemoryManager.getMaxStorageMemory(conf),
+      numCores)
   }
 
   // Max number of bytes worth of blocks to evict when unrolling
@@ -52,7 +54,7 @@ private[spark] class StaticMemoryManager(
    * Acquire N bytes of memory for execution.
    * @return number of bytes successfully granted (<= N).
    */
-  override def acquireExecutionMemory(
+  override def doAcquireExecutionMemory(
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
     assert(numBytes >= 0)
diff --git a/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
index 5bf78d5b674b..a3093030a0f9 100644
--- a/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
@@ -42,10 +42,14 @@ import org.apache.spark.storage.{BlockStatus, BlockId}
  * up most of the storage space, in which case the new blocks will be evicted immediately
  * according to their respective storage levels.
  */
-private[spark] class UnifiedMemoryManager(conf: SparkConf, maxMemory: Long) extends MemoryManager {
+private[spark] class UnifiedMemoryManager(
+    conf: SparkConf,
+    maxMemory: Long,
+    numCores: Int)
+  extends MemoryManager(conf, numCores) {
 
-  def this(conf: SparkConf) {
-    this(conf, UnifiedMemoryManager.getMaxMemory(conf))
+  def this(conf: SparkConf, numCores: Int) {
+    this(conf, UnifiedMemoryManager.getMaxMemory(conf), numCores)
   }
 
   /**
@@ -91,7 +95,7 @@ private[spark] class UnifiedMemoryManager(conf: SparkConf, maxMemory: Long) exte
    * Blocks evicted in the process, if any, are added to `evictedBlocks`.
    * @return number of bytes successfully granted (<= N).
    */
-  override def acquireExecutionMemory(
+  private[memory] override def doAcquireExecutionMemory(
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
     assert(numBytes >= 0)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/Task.scala b/core/src/main/scala/org/apache/spark/scheduler/Task.scala
index 9edf9f048f9f..4fb32ba8cb18 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/Task.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/Task.scala
@@ -25,8 +25,8 @@ import scala.collection.mutable.HashMap
 import org.apache.spark.metrics.MetricsSystem
 import org.apache.spark.{Accumulator, SparkEnv, TaskContextImpl, TaskContext}
 import org.apache.spark.executor.TaskMetrics
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.serializer.SerializerInstance
-import org.apache.spark.unsafe.memory.TaskMemoryManager
 import org.apache.spark.util.ByteBufferInputStream
 import org.apache.spark.util.Utils
 
@@ -89,10 +89,6 @@ private[spark] abstract class Task[T](
     } finally {
       context.markTaskCompleted()
       try {
-        Utils.tryLogNonFatalError {
-          // Release memory used by this thread for shuffles
-          SparkEnv.get.shuffleMemoryManager.releaseMemoryForThisTask()
-        }
         Utils.tryLogNonFatalError {
           // Release memory used by this thread for unrolling blocks
           SparkEnv.get.blockManager.memoryStore.releaseUnrollMemoryForThisTask()
diff --git a/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
index 7c3e2b5a3703..b0abda4a81b8 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/BlockStoreShuffleReader.scala
@@ -98,13 +98,14 @@ private[spark] class BlockStoreShuffleReader[K, C](
       case Some(keyOrd: Ordering[K]) =>
         // Create an ExternalSorter to sort the data. Note that if spark.shuffle.spill is disabled,
         // the ExternalSorter won't spill to disk.
-        val sorter = new ExternalSorter[K, C, C](ordering = Some(keyOrd), serializer = Some(ser))
+        val sorter =
+          new ExternalSorter[K, C, C](context, ordering = Some(keyOrd), serializer = Some(ser))
         sorter.insertAll(aggregatedIter)
         context.taskMetrics().incMemoryBytesSpilled(sorter.memoryBytesSpilled)
         context.taskMetrics().incDiskBytesSpilled(sorter.diskBytesSpilled)
         context.internalMetricsToAccumulators(
           InternalAccumulator.PEAK_EXECUTION_MEMORY).add(sorter.peakMemoryUsedBytes)
-        sorter.iterator
+        CompletionIterator[Product2[K, C], Iterator[Product2[K, C]]](sorter.iterator, sorter.stop())
       case None =>
         aggregatedIter
     }
diff --git a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala b/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
deleted file mode 100644
index 9bd18da47f1a..000000000000
--- a/core/src/main/scala/org/apache/spark/shuffle/ShuffleMemoryManager.scala
+++ /dev/null
@@ -1,209 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle
-
-import scala.collection.mutable
-import scala.collection.mutable.ArrayBuffer
-
-import com.google.common.annotations.VisibleForTesting
-
-import org.apache.spark._
-import org.apache.spark.memory.{StaticMemoryManager, MemoryManager}
-import org.apache.spark.storage.{BlockId, BlockStatus}
-import org.apache.spark.unsafe.array.ByteArrayMethods
-
-/**
- * Allocates a pool of memory to tasks for use in shuffle operations. Each disk-spilling
- * collection (ExternalAppendOnlyMap or ExternalSorter) used by these tasks can acquire memory
- * from this pool and release it as it spills data out. When a task ends, all its memory will be
- * released by the Executor.
- *
- * This class tries to ensure that each task gets a reasonable share of memory, instead of some
- * task ramping up to a large amount first and then causing others to spill to disk repeatedly.
- * If there are N tasks, it ensures that each tasks can acquire at least 1 / 2N of the memory
- * before it has to spill, and at most 1 / N. Because N varies dynamically, we keep track of the
- * set of active tasks and redo the calculations of 1 / 2N and 1 / N in waiting tasks whenever
- * this set changes. This is all done by synchronizing access to `memoryManager` to mutate state
- * and using wait() and notifyAll() to signal changes.
- *
- * Use `ShuffleMemoryManager.create()` factory method to create a new instance.
- *
- * @param memoryManager the interface through which this manager acquires execution memory
- * @param pageSizeBytes number of bytes for each page, by default.
- */
-private[spark]
-class ShuffleMemoryManager protected (
-    memoryManager: MemoryManager,
-    val pageSizeBytes: Long)
-  extends Logging {
-
-  private val taskMemory = new mutable.HashMap[Long, Long]()  // taskAttemptId -> memory bytes
-
-  private def currentTaskAttemptId(): Long = {
-    // In case this is called on the driver, return an invalid task attempt id.
-    Option(TaskContext.get()).map(_.taskAttemptId()).getOrElse(-1L)
-  }
-
-  /**
-   * Try to acquire up to numBytes memory for the current task, and return the number of bytes
-   * obtained, or 0 if none can be allocated. This call may block until there is enough free memory
-   * in some situations, to make sure each task has a chance to ramp up to at least 1 / 2N of the
-   * total memory pool (where N is the # of active tasks) before it is forced to spill. This can
-   * happen if the number of tasks increases but an older task had a lot of memory already.
-   */
-  def tryToAcquire(numBytes: Long): Long = memoryManager.synchronized {
-    val taskAttemptId = currentTaskAttemptId()
-    assert(numBytes > 0, "invalid number of bytes requested: " + numBytes)
-
-    // Add this task to the taskMemory map just so we can keep an accurate count of the number
-    // of active tasks, to let other tasks ramp down their memory in calls to tryToAcquire
-    if (!taskMemory.contains(taskAttemptId)) {
-      taskMemory(taskAttemptId) = 0L
-      // This will later cause waiting tasks to wake up and check numTasks again
-      memoryManager.notifyAll()
-    }
-
-    // Keep looping until we're either sure that we don't want to grant this request (because this
-    // task would have more than 1 / numActiveTasks of the memory) or we have enough free
-    // memory to give it (we always let each task get at least 1 / (2 * numActiveTasks)).
-    // TODO: simplify this to limit each task to its own slot
-    while (true) {
-      val numActiveTasks = taskMemory.keys.size
-      val curMem = taskMemory(taskAttemptId)
-      val maxMemory = memoryManager.maxExecutionMemory
-      val freeMemory = maxMemory - taskMemory.values.sum
-
-      // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
-      // don't let it be negative
-      val maxToGrant = math.min(numBytes, math.max(0, (maxMemory / numActiveTasks) - curMem))
-      // Only give it as much memory as is free, which might be none if it reached 1 / numTasks
-      val toGrant = math.min(maxToGrant, freeMemory)
-
-      if (curMem < maxMemory / (2 * numActiveTasks)) {
-        // We want to let each task get at least 1 / (2 * numActiveTasks) before blocking;
-        // if we can't give it this much now, wait for other tasks to free up memory
-        // (this happens if older tasks allocated lots of memory before N grew)
-        if (freeMemory >= math.min(maxToGrant, maxMemory / (2 * numActiveTasks) - curMem)) {
-          return acquire(toGrant)
-        } else {
-          logInfo(
-            s"TID $taskAttemptId waiting for at least 1/2N of shuffle memory pool to be free")
-          memoryManager.wait()
-        }
-      } else {
-        return acquire(toGrant)
-      }
-    }
-    0L  // Never reached
-  }
-
-  /**
-   * Acquire N bytes of execution memory from the memory manager for the current task.
-   * @return number of bytes actually acquired (<= N).
-   */
-  private def acquire(numBytes: Long): Long = memoryManager.synchronized {
-    val taskAttemptId = currentTaskAttemptId()
-    val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
-    val acquired = memoryManager.acquireExecutionMemory(numBytes, evictedBlocks)
-    // Register evicted blocks, if any, with the active task metrics
-    // TODO: just do this in `acquireExecutionMemory` (SPARK-10985)
-    Option(TaskContext.get()).foreach { tc =>
-      val metrics = tc.taskMetrics()
-      val lastUpdatedBlocks = metrics.updatedBlocks.getOrElse(Seq[(BlockId, BlockStatus)]())
-      metrics.updatedBlocks = Some(lastUpdatedBlocks ++ evictedBlocks.toSeq)
-    }
-    taskMemory(taskAttemptId) += acquired
-    acquired
-  }
-
-  /** Release numBytes bytes for the current task. */
-  def release(numBytes: Long): Unit = memoryManager.synchronized {
-    val taskAttemptId = currentTaskAttemptId()
-    val curMem = taskMemory.getOrElse(taskAttemptId, 0L)
-    if (curMem < numBytes) {
-      throw new SparkException(
-        s"Internal error: release called on $numBytes bytes but task only has $curMem")
-    }
-    if (taskMemory.contains(taskAttemptId)) {
-      taskMemory(taskAttemptId) -= numBytes
-      memoryManager.releaseExecutionMemory(numBytes)
-    }
-    memoryManager.notifyAll() // Notify waiters in tryToAcquire that memory has been freed
-  }
-
-  /** Release all memory for the current task and mark it as inactive (e.g. when a task ends). */
-  def releaseMemoryForThisTask(): Unit = memoryManager.synchronized {
-    val taskAttemptId = currentTaskAttemptId()
-    taskMemory.remove(taskAttemptId).foreach { numBytes =>
-      memoryManager.releaseExecutionMemory(numBytes)
-    }
-    memoryManager.notifyAll() // Notify waiters in tryToAcquire that memory has been freed
-  }
-
-  /** Returns the memory consumption, in bytes, for the current task */
-  def getMemoryConsumptionForThisTask(): Long = memoryManager.synchronized {
-    val taskAttemptId = currentTaskAttemptId()
-    taskMemory.getOrElse(taskAttemptId, 0L)
-  }
-}
-
-
-private[spark] object ShuffleMemoryManager {
-
-  def create(
-      conf: SparkConf,
-      memoryManager: MemoryManager,
-      numCores: Int): ShuffleMemoryManager = {
-    val maxMemory = memoryManager.maxExecutionMemory
-    val pageSize = ShuffleMemoryManager.getPageSize(conf, maxMemory, numCores)
-    new ShuffleMemoryManager(memoryManager, pageSize)
-  }
-
-  /**
-   * Create a dummy [[ShuffleMemoryManager]] with the specified capacity and page size.
-   */
-  def create(maxMemory: Long, pageSizeBytes: Long): ShuffleMemoryManager = {
-    val conf = new SparkConf
-    val memoryManager = new StaticMemoryManager(
-      conf, maxExecutionMemory = maxMemory, maxStorageMemory = Long.MaxValue)
-    new ShuffleMemoryManager(memoryManager, pageSizeBytes)
-  }
-
-  @VisibleForTesting
-  def createForTesting(maxMemory: Long): ShuffleMemoryManager = {
-    create(maxMemory, 4 * 1024 * 1024)
-  }
-
-  /**
-   * Sets the page size, in bytes.
-   *
-   * If user didn't explicitly set "spark.buffer.pageSize", we figure out the default value
-   * by looking at the number of cores available to the process, and the total amount of memory,
-   * and then divide it by a factor of safety.
-   */
-  private def getPageSize(conf: SparkConf, maxMemory: Long, numCores: Int): Long = {
-    val minPageSize = 1L * 1024 * 1024   // 1MB
-    val maxPageSize = 64L * minPageSize  // 64MB
-    val cores = if (numCores > 0) numCores else Runtime.getRuntime.availableProcessors()
-    // Because of rounding to next power of 2, we may have safetyFactor as 8 in worst case
-    val safetyFactor = 16
-    val size = ByteArrayMethods.nextPowerOf2(maxMemory / cores / safetyFactor)
-    val default = math.min(maxPageSize, math.max(minPageSize, size))
-    conf.getSizeAsBytes("spark.buffer.pageSize", default)
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
index 1105167d39d8..66b6bbc61fe8 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleManager.scala
@@ -133,7 +133,6 @@ private[spark] class SortShuffleManager(conf: SparkConf) extends ShuffleManager
           env.blockManager,
           shuffleBlockResolver.asInstanceOf[IndexShuffleBlockResolver],
           context.taskMemoryManager(),
-          env.shuffleMemoryManager,
           unsafeShuffleHandle,
           mapId,
           context,
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
index bbd9c1ab53cd..808317b017a0 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
@@ -52,13 +52,13 @@ private[spark] class SortShuffleWriter[K, V, C](
     sorter = if (dep.mapSideCombine) {
       require(dep.aggregator.isDefined, "Map-side combine without Aggregator specified!")
       new ExternalSorter[K, V, C](
-        dep.aggregator, Some(dep.partitioner), dep.keyOrdering, dep.serializer)
+        context, dep.aggregator, Some(dep.partitioner), dep.keyOrdering, dep.serializer)
     } else {
       // In this case we pass neither an aggregator nor an ordering to the sorter, because we don't
       // care whether the keys get sorted in each partition; that will be done on the reduce side
       // if the operation being run is sortByKey.
       new ExternalSorter[K, V, V](
-        aggregator = None, Some(dep.partitioner), ordering = None, dep.serializer)
+        context, aggregator = None, Some(dep.partitioner), ordering = None, dep.serializer)
     }
     sorter.insertAll(records)
 
@@ -67,7 +67,7 @@ private[spark] class SortShuffleWriter[K, V, C](
     // (see SPARK-3570).
     val outputFile = shuffleBlockResolver.getDataFile(dep.shuffleId, mapId)
     val blockId = ShuffleBlockId(dep.shuffleId, mapId, IndexShuffleBlockResolver.NOOP_REDUCE_ID)
-    val partitionLengths = sorter.writePartitionedFile(blockId, context, outputFile)
+    val partitionLengths = sorter.writePartitionedFile(blockId, outputFile)
     shuffleBlockResolver.writeIndexFile(dep.shuffleId, mapId, partitionLengths)
 
     mapStatus = MapStatus(blockManager.shuffleServerId, partitionLengths)
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
index cfa58f5ef408..f6d81ee5bf05 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalAppendOnlyMap.scala
@@ -28,8 +28,10 @@ import com.google.common.io.ByteStreams
 
 import org.apache.spark.{Logging, SparkEnv, TaskContext}
 import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.serializer.{DeserializationStream, Serializer}
 import org.apache.spark.storage.{BlockId, BlockManager}
+import org.apache.spark.util.CompletionIterator
 import org.apache.spark.util.collection.ExternalAppendOnlyMap.HashComparator
 import org.apache.spark.executor.ShuffleWriteMetrics
 
@@ -55,12 +57,30 @@ class ExternalAppendOnlyMap[K, V, C](
     mergeValue: (C, V) => C,
     mergeCombiners: (C, C) => C,
     serializer: Serializer = SparkEnv.get.serializer,
-    blockManager: BlockManager = SparkEnv.get.blockManager)
+    blockManager: BlockManager = SparkEnv.get.blockManager,
+    context: TaskContext = TaskContext.get())
   extends Iterable[(K, C)]
   with Serializable
   with Logging
   with Spillable[SizeTracker] {
 
+  if (context == null) {
+    throw new IllegalStateException(
+      "Spillable collections should not be instantiated outside of tasks")
+  }
+
+  // Backwards-compatibility constructor for binary compatibility
+  def this(
+      createCombiner: V => C,
+      mergeValue: (C, V) => C,
+      mergeCombiners: (C, C) => C,
+      serializer: Serializer,
+      blockManager: BlockManager) {
+    this(createCombiner, mergeValue, mergeCombiners, serializer, blockManager, TaskContext.get())
+  }
+
+  override protected[this] def taskMemoryManager: TaskMemoryManager = context.taskMemoryManager()
+
   private var currentMap = new SizeTrackingAppendOnlyMap[K, C]
   private val spilledMaps = new ArrayBuffer[DiskMapIterator]
   private val sparkConf = SparkEnv.get.conf
@@ -118,6 +138,10 @@ class ExternalAppendOnlyMap[K, V, C](
    * The shuffle memory usage of the first trackMemoryThreshold entries is not tracked.
    */
   def insertAll(entries: Iterator[Product2[K, V]]): Unit = {
+    if (currentMap == null) {
+      throw new IllegalStateException(
+        "Cannot insert new elements into a map after calling iterator")
+    }
     // An update function for the map that we reuse across entries to avoid allocating
     // a new closure each time
     var curEntry: Product2[K, V] = null
@@ -215,17 +239,26 @@ class ExternalAppendOnlyMap[K, V, C](
   }
 
   /**
-   * Return an iterator that merges the in-memory map with the spilled maps.
+   * Return a destructive iterator that merges the in-memory map with the spilled maps.
    * If no spill has occurred, simply return the in-memory map's iterator.
    */
   override def iterator: Iterator[(K, C)] = {
+    if (currentMap == null) {
+      throw new IllegalStateException(
+        "ExternalAppendOnlyMap.iterator is destructive and should only be called once.")
+    }
     if (spilledMaps.isEmpty) {
-      currentMap.iterator
+      CompletionIterator[(K, C), Iterator[(K, C)]](currentMap.iterator, freeCurrentMap())
     } else {
       new ExternalIterator()
     }
   }
 
+  private def freeCurrentMap(): Unit = {
+    currentMap = null // So that the memory can be garbage-collected
+    releaseMemory()
+  }
+
   /**
    * An iterator that sort-merges (K, C) pairs from the in-memory map and the spilled maps
    */
@@ -237,7 +270,8 @@ class ExternalAppendOnlyMap[K, V, C](
 
     // Input streams are derived both from the in-memory map and spilled maps on disk
     // The in-memory map is sorted in place, while the spilled maps are already in sorted order
-    private val sortedMap = currentMap.destructiveSortedIterator(keyComparator)
+    private val sortedMap = CompletionIterator[(K, C), Iterator[(K, C)]](
+      currentMap.destructiveSortedIterator(keyComparator), freeCurrentMap())
     private val inputStreams = (Seq(sortedMap) ++ spilledMaps).map(it => it.buffered)
 
     inputStreams.foreach { it =>
@@ -493,12 +527,7 @@ class ExternalAppendOnlyMap[K, V, C](
       }
     }
 
-    val context = TaskContext.get()
-    // context is null in some tests of ExternalAppendOnlyMapSuite because these tests don't run in
-    // a TaskContext.
-    if (context != null) {
-      context.addTaskCompletionListener(context => cleanup())
-    }
+    context.addTaskCompletionListener(context => cleanup())
   }
 
   /** Convenience function to hash the given (K, C) pair by the key. */
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index c48c453a90d0..a44e72b7c16d 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -27,6 +27,7 @@ import com.google.common.annotations.VisibleForTesting
 import com.google.common.io.ByteStreams
 
 import org.apache.spark._
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.serializer._
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.storage.{BlockId, DiskBlockObjectWriter}
@@ -87,6 +88,7 @@ import org.apache.spark.storage.{BlockId, DiskBlockObjectWriter}
  * - Users are expected to call stop() at the end to delete all the intermediate files.
  */
 private[spark] class ExternalSorter[K, V, C](
+    context: TaskContext,
     aggregator: Option[Aggregator[K, V, C]] = None,
     partitioner: Option[Partitioner] = None,
     ordering: Option[Ordering[K]] = None,
@@ -94,6 +96,8 @@ private[spark] class ExternalSorter[K, V, C](
   extends Logging
   with Spillable[WritablePartitionedPairCollection[K, C]] {
 
+  override protected[this] def taskMemoryManager: TaskMemoryManager = context.taskMemoryManager()
+
   private val conf = SparkEnv.get.conf
 
   private val numPartitions = partitioner.map(_.numPartitions).getOrElse(1)
@@ -640,7 +644,6 @@ private[spark] class ExternalSorter[K, V, C](
    */
   def writePartitionedFile(
       blockId: BlockId,
-      context: TaskContext,
       outputFile: File): Array[Long] = {
 
     // Track location of each range in the output file
@@ -686,8 +689,11 @@ private[spark] class ExternalSorter[K, V, C](
   }
 
   def stop(): Unit = {
+    map = null // So that the memory can be garbage-collected
+    buffer = null // So that the memory can be garbage-collected
     spills.foreach(s => s.file.delete())
     spills.clear()
+    releaseMemory()
   }
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
index d2a68ca7a3b4..a76891acf0ba 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
@@ -17,8 +17,8 @@
 
 package org.apache.spark.util.collection
 
-import org.apache.spark.Logging
-import org.apache.spark.SparkEnv
+import org.apache.spark.memory.TaskMemoryManager
+import org.apache.spark.{Logging, SparkEnv}
 
 /**
  * Spills contents of an in-memory collection to disk when the memory threshold
@@ -40,7 +40,7 @@ private[spark] trait Spillable[C] extends Logging {
   protected def addElementsRead(): Unit = { _elementsRead += 1 }
 
   // Memory manager that can be used to acquire/release memory
-  private[this] val shuffleMemoryManager = SparkEnv.get.shuffleMemoryManager
+  protected[this] def taskMemoryManager: TaskMemoryManager
 
   // Initial threshold for the size of a collection before we start tracking its memory usage
   // For testing only
@@ -78,7 +78,7 @@ private[spark] trait Spillable[C] extends Logging {
     if (elementsRead % 32 == 0 && currentMemory >= myMemoryThreshold) {
       // Claim up to double our current memory from the shuffle memory pool
       val amountToRequest = 2 * currentMemory - myMemoryThreshold
-      val granted = shuffleMemoryManager.tryToAcquire(amountToRequest)
+      val granted = taskMemoryManager.acquireExecutionMemory(amountToRequest)
       myMemoryThreshold += granted
       // If we were granted too little memory to grow further (either tryToAcquire returned 0,
       // or we already had more memory than myMemoryThreshold), spill the current collection
@@ -92,7 +92,7 @@ private[spark] trait Spillable[C] extends Logging {
       spill(collection)
       _elementsRead = 0
       _memoryBytesSpilled += currentMemory
-      releaseMemoryForThisThread()
+      releaseMemory()
     }
     shouldSpill
   }
@@ -103,11 +103,11 @@ private[spark] trait Spillable[C] extends Logging {
   def memoryBytesSpilled: Long = _memoryBytesSpilled
 
   /**
-   * Release our memory back to the shuffle pool so that other threads can grab it.
+   * Release our memory back to the execution pool so that other tasks can grab it.
    */
-  private def releaseMemoryForThisThread(): Unit = {
+  def releaseMemory(): Unit = {
     // The amount we requested does not include the initial memory tracking threshold
-    shuffleMemoryManager.release(myMemoryThreshold - initialMemoryThreshold)
+    taskMemoryManager.releaseExecutionMemory(myMemoryThreshold - initialMemoryThreshold)
     myMemoryThreshold = initialMemoryThreshold
   }
 
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/memory/TaskMemoryManagerSuite.java b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
similarity index 74%
rename from unsafe/src/test/java/org/apache/spark/unsafe/memory/TaskMemoryManagerSuite.java
rename to core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
index 06fb08118365..f381db0c6265 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/memory/TaskMemoryManagerSuite.java
+++ b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
@@ -15,33 +15,28 @@
  * limitations under the License.
  */
 
-package org.apache.spark.unsafe.memory;
+package org.apache.spark.memory;
 
 import org.junit.Assert;
 import org.junit.Test;
 
-public class TaskMemoryManagerSuite {
+import org.apache.spark.SparkConf;
+import org.apache.spark.unsafe.memory.MemoryBlock;
 
-  @Test
-  public void leakedNonPageMemoryIsDetected() {
-    final TaskMemoryManager manager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
-    manager.allocate(1024);  // leak memory
-    Assert.assertEquals(1024, manager.cleanUpAllAllocatedMemory());
-  }
+public class TaskMemoryManagerSuite {
 
   @Test
   public void leakedPageMemoryIsDetected() {
-    final TaskMemoryManager manager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+    final TaskMemoryManager manager = new TaskMemoryManager(
+      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
     manager.allocatePage(4096);  // leak memory
     Assert.assertEquals(4096, manager.cleanUpAllAllocatedMemory());
   }
 
   @Test
   public void encodePageNumberAndOffsetOffHeap() {
-    final TaskMemoryManager manager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.UNSAFE));
+    final TaskMemoryManager manager = new TaskMemoryManager(
+      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "true")), 0);
     final MemoryBlock dataPage = manager.allocatePage(256);
     // In off-heap mode, an offset is an absolute address that may require more than 51 bits to
     // encode. This test exercises that corner-case:
@@ -53,8 +48,8 @@ public void encodePageNumberAndOffsetOffHeap() {
 
   @Test
   public void encodePageNumberAndOffsetOnHeap() {
-    final TaskMemoryManager manager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+    final TaskMemoryManager manager = new TaskMemoryManager(
+      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
     final MemoryBlock dataPage = manager.allocatePage(256);
     final long encodedAddress = manager.encodePageNumberAndOffset(dataPage, 64);
     Assert.assertEquals(dataPage.getBaseObject(), manager.getPage(encodedAddress));
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
index 232ae4d926bc..7fb2f92ca80e 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
@@ -21,18 +21,19 @@
 import org.junit.Test;
 import static org.junit.Assert.*;
 
-import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryAllocator;
+import org.apache.spark.SparkConf;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import static org.apache.spark.shuffle.sort.PackedRecordPointer.*;
 
 public class PackedRecordPointerSuite {
 
   @Test
   public void heap() {
+    final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "false");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
     final MemoryBlock page0 = memoryManager.allocatePage(128);
     final MemoryBlock page1 = memoryManager.allocatePage(128);
     final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
@@ -49,8 +50,9 @@ public void heap() {
 
   @Test
   public void offHeap() {
+    final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "true");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.UNSAFE));
+      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
     final MemoryBlock page0 = memoryManager.allocatePage(128);
     final MemoryBlock page1 = memoryManager.allocatePage(128);
     final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
index 1ef3c5ff64ba..5049a5306ff2 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
@@ -24,11 +24,11 @@
 import org.junit.Test;
 
 import org.apache.spark.HashPartitioner;
+import org.apache.spark.SparkConf;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryAllocator;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 public class ShuffleInMemorySorterSuite {
 
@@ -58,8 +58,9 @@ public void testBasicSorting() throws Exception {
       "Lychee",
       "Mango"
     };
+    final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "false");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
     final MemoryBlock dataPage = memoryManager.allocatePage(2048);
     final Object baseObject = dataPage.getBaseObject();
     final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
index 29d9823b1f71..d65926949c03 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
@@ -39,7 +39,6 @@
 import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.lessThan;
 import static org.junit.Assert.*;
-import static org.mockito.AdditionalAnswers.returnsFirstArg;
 import static org.mockito.Answers.RETURNS_SMART_NULLS;
 import static org.mockito.Mockito.*;
 
@@ -54,19 +53,15 @@
 import org.apache.spark.serializer.*;
 import org.apache.spark.scheduler.MapStatus;
 import org.apache.spark.shuffle.IndexShuffleBlockResolver;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
-import org.apache.spark.shuffle.sort.SerializedShuffleHandle;
 import org.apache.spark.storage.*;
-import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryAllocator;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 public class UnsafeShuffleWriterSuite {
 
   static final int NUM_PARTITITONS = 4;
-  final TaskMemoryManager taskMemoryManager =
-    new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+  TaskMemoryManager taskMemoryManager;
   final HashPartitioner hashPartitioner = new HashPartitioner(NUM_PARTITITONS);
   File mergedOutputFile;
   File tempDir;
@@ -76,7 +71,6 @@ public class UnsafeShuffleWriterSuite {
   final Serializer serializer = new KryoSerializer(new SparkConf());
   TaskMetrics taskMetrics;
 
-  @Mock(answer = RETURNS_SMART_NULLS) ShuffleMemoryManager shuffleMemoryManager;
   @Mock(answer = RETURNS_SMART_NULLS) BlockManager blockManager;
   @Mock(answer = RETURNS_SMART_NULLS) IndexShuffleBlockResolver shuffleBlockResolver;
   @Mock(answer = RETURNS_SMART_NULLS) DiskBlockManager diskBlockManager;
@@ -111,11 +105,11 @@ public void setUp() throws IOException {
     mergedOutputFile = File.createTempFile("mergedoutput", "", tempDir);
     partitionSizesInMergedFile = null;
     spillFilesCreated.clear();
-    conf = new SparkConf().set("spark.buffer.pageSize", "128m");
+    conf = new SparkConf()
+      .set("spark.buffer.pageSize", "128m")
+      .set("spark.unsafe.offHeap", "false");
     taskMetrics = new TaskMetrics();
-
-    when(shuffleMemoryManager.tryToAcquire(anyLong())).then(returnsFirstArg());
-    when(shuffleMemoryManager.pageSizeBytes()).thenReturn(128L * 1024 * 1024);
+    taskMemoryManager =  new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
 
     when(blockManager.diskBlockManager()).thenReturn(diskBlockManager);
     when(blockManager.getDiskWriter(
@@ -203,7 +197,6 @@ private UnsafeShuffleWriter<Object, Object> createWriter(
       blockManager,
       shuffleBlockResolver,
       taskMemoryManager,
-      shuffleMemoryManager,
       new SerializedShuffleHandle<Object, Object>(0, 1, shuffleDep),
       0, // map id
       taskContext,
@@ -405,11 +398,12 @@ public void mergeSpillsWithFileStreamAndNoCompression() throws Exception {
 
   @Test
   public void writeEnoughDataToTriggerSpill() throws Exception {
-    when(shuffleMemoryManager.tryToAcquire(anyLong()))
-      .then(returnsFirstArg()) // Allocate initial sort buffer
-      .then(returnsFirstArg()) // Allocate initial data page
-      .thenReturn(0L) // Deny request to allocate new data page
-      .then(returnsFirstArg());  // Grant new sort buffer and data page.
+    taskMemoryManager = spy(taskMemoryManager);
+    doCallRealMethod() // initialize sort buffer
+      .doCallRealMethod() // allocate initial data page
+      .doReturn(0L) // deny request to allocate new page
+      .doCallRealMethod() // grant new sort buffer and data page
+      .when(taskMemoryManager).acquireExecutionMemory(anyLong());
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
     final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<Product2<Object, Object>>();
     final byte[] bigByteArray = new byte[PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES / 128];
@@ -417,7 +411,7 @@ public void writeEnoughDataToTriggerSpill() throws Exception {
       dataToWrite.add(new Tuple2<Object, Object>(i, bigByteArray));
     }
     writer.write(dataToWrite.iterator());
-    verify(shuffleMemoryManager, times(5)).tryToAcquire(anyLong());
+    verify(taskMemoryManager, times(5)).acquireExecutionMemory(anyLong());
     assertEquals(2, spillFilesCreated.size());
     writer.stop(true);
     readRecordsFromFile();
@@ -432,18 +426,19 @@ public void writeEnoughDataToTriggerSpill() throws Exception {
 
   @Test
   public void writeEnoughRecordsToTriggerSortBufferExpansionAndSpill() throws Exception {
-    when(shuffleMemoryManager.tryToAcquire(anyLong()))
-      .then(returnsFirstArg()) // Allocate initial sort buffer
-      .then(returnsFirstArg()) // Allocate initial data page
-      .thenReturn(0L) // Deny request to grow sort buffer
-      .then(returnsFirstArg());  // Grant new sort buffer and data page.
+    taskMemoryManager = spy(taskMemoryManager);
+    doCallRealMethod() // initialize sort buffer
+      .doCallRealMethod() // allocate initial data page
+      .doReturn(0L) // deny request to allocate new page
+      .doCallRealMethod() // grant new sort buffer and data page
+      .when(taskMemoryManager).acquireExecutionMemory(anyLong());
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
-    final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<Product2<Object, Object>>();
+    final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<>();
     for (int i = 0; i < UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE; i++) {
       dataToWrite.add(new Tuple2<Object, Object>(i, i));
     }
     writer.write(dataToWrite.iterator());
-    verify(shuffleMemoryManager, times(5)).tryToAcquire(anyLong());
+    verify(taskMemoryManager, times(5)).acquireExecutionMemory(anyLong());
     assertEquals(2, spillFilesCreated.size());
     writer.stop(true);
     readRecordsFromFile();
@@ -509,13 +504,13 @@ public void testPeakMemoryUsed() throws Exception {
     final long recordLengthBytes = 8;
     final long pageSizeBytes = 256;
     final long numRecordsPerPage = pageSizeBytes / recordLengthBytes;
-    when(shuffleMemoryManager.pageSizeBytes()).thenReturn(pageSizeBytes);
+    taskMemoryManager = spy(taskMemoryManager);
+    when(taskMemoryManager.pageSizeBytes()).thenReturn(pageSizeBytes);
     final UnsafeShuffleWriter<Object, Object> writer =
       new UnsafeShuffleWriter<Object, Object>(
         blockManager,
         shuffleBlockResolver,
         taskMemoryManager,
-        shuffleMemoryManager,
         new SerializedShuffleHandle<>(0, 1, shuffleDep),
         0, // map id
         taskContext,
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
index ab480b60adae..6e52496cf933 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
@@ -21,15 +21,13 @@
 import java.nio.ByteBuffer;
 import java.util.*;
 
+import org.apache.spark.memory.TaskMemoryManager;
 import org.junit.*;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
 import static org.hamcrest.Matchers.greaterThan;
 import static org.junit.Assert.*;
-import static org.mockito.AdditionalMatchers.geq;
-import static org.mockito.Mockito.*;
 
-import org.apache.spark.shuffle.ShuffleMemoryManager;
+import org.apache.spark.SparkConf;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.memory.*;
 import org.apache.spark.unsafe.Platform;
@@ -39,42 +37,29 @@ public abstract class AbstractBytesToBytesMapSuite {
 
   private final Random rand = new Random(42);
 
-  private ShuffleMemoryManager shuffleMemoryManager;
+  private GrantEverythingMemoryManager memoryManager;
   private TaskMemoryManager taskMemoryManager;
-  private TaskMemoryManager sizeLimitedTaskMemoryManager;
   private final long PAGE_SIZE_BYTES = 1L << 26; // 64 megabytes
 
   @Before
   public void setup() {
-    shuffleMemoryManager = ShuffleMemoryManager.create(Long.MAX_VALUE, PAGE_SIZE_BYTES);
-    taskMemoryManager = new TaskMemoryManager(new ExecutorMemoryManager(getMemoryAllocator()));
-    // Mocked memory manager for tests that check the maximum array size, since actually allocating
-    // such large arrays will cause us to run out of memory in our tests.
-    sizeLimitedTaskMemoryManager = mock(TaskMemoryManager.class);
-    when(sizeLimitedTaskMemoryManager.allocate(geq(1L << 20))).thenAnswer(
-      new Answer<MemoryBlock>() {
-        @Override
-        public MemoryBlock answer(InvocationOnMock invocation) throws Throwable {
-          if (((Long) invocation.getArguments()[0] / 8) > Integer.MAX_VALUE) {
-            throw new OutOfMemoryError("Requested array size exceeds VM limit");
-          }
-          return new MemoryBlock(null, 0, (Long) invocation.getArguments()[0]);
-        }
-      }
-    );
+    memoryManager =
+      new GrantEverythingMemoryManager(
+        new SparkConf().set("spark.unsafe.offHeap", "" + useOffHeapMemoryAllocator()));
+    taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
   }
 
   @After
   public void tearDown() {
     Assert.assertEquals(0L, taskMemoryManager.cleanUpAllAllocatedMemory());
-    if (shuffleMemoryManager != null) {
-      long leakedShuffleMemory = shuffleMemoryManager.getMemoryConsumptionForThisTask();
-      shuffleMemoryManager = null;
-      Assert.assertEquals(0L, leakedShuffleMemory);
+    if (taskMemoryManager != null) {
+      long leakedMemory = taskMemoryManager.getMemoryConsumptionForThisTask();
+      taskMemoryManager = null;
+      Assert.assertEquals(0L, leakedMemory);
     }
   }
 
-  protected abstract MemoryAllocator getMemoryAllocator();
+  protected abstract boolean useOffHeapMemoryAllocator();
 
   private static byte[] getByteArray(MemoryLocation loc, int size) {
     final byte[] arr = new byte[size];
@@ -110,8 +95,7 @@ private static boolean arrayEquals(
 
   @Test
   public void emptyMap() {
-    BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, 64, PAGE_SIZE_BYTES);
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 64, PAGE_SIZE_BYTES);
     try {
       Assert.assertEquals(0, map.numElements());
       final int keyLengthInWords = 10;
@@ -126,8 +110,7 @@ public void emptyMap() {
 
   @Test
   public void setAndRetrieveAKey() {
-    BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, 64, PAGE_SIZE_BYTES);
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 64, PAGE_SIZE_BYTES);
     final int recordLengthWords = 10;
     final int recordLengthBytes = recordLengthWords * 8;
     final byte[] keyData = getRandomByteArray(recordLengthWords);
@@ -179,8 +162,7 @@ public void setAndRetrieveAKey() {
 
   private void iteratorTestBase(boolean destructive) throws Exception {
     final int size = 4096;
-    BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, size / 2, PAGE_SIZE_BYTES);
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, size / 2, PAGE_SIZE_BYTES);
     try {
       for (long i = 0; i < size; i++) {
         final long[] value = new long[] { i };
@@ -265,8 +247,8 @@ public void iteratingOverDataPagesWithWastedSpace() throws Exception {
     final int NUM_ENTRIES = 1000 * 1000;
     final int KEY_LENGTH = 24;
     final int VALUE_LENGTH = 40;
-    final BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, NUM_ENTRIES, PAGE_SIZE_BYTES);
+    final BytesToBytesMap map =
+      new BytesToBytesMap(taskMemoryManager, NUM_ENTRIES, PAGE_SIZE_BYTES);
     // Each record will take 8 + 24 + 40 = 72 bytes of space in the data page. Our 64-megabyte
     // pages won't be evenly-divisible by records of this size, which will cause us to waste some
     // space at the end of the page. This is necessary in order for us to take the end-of-record
@@ -335,9 +317,7 @@ public void randomizedStressTest() {
     // Java arrays' hashCodes() aren't based on the arrays' contents, so we need to wrap arrays
     // into ByteBuffers in order to use them as keys here.
     final Map<ByteBuffer, byte[]> expected = new HashMap<ByteBuffer, byte[]>();
-    final BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, size, PAGE_SIZE_BYTES);
-
+    final BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, size, PAGE_SIZE_BYTES);
     try {
       // Fill the map to 90% full so that we can trigger probing
       for (int i = 0; i < size * 0.9; i++) {
@@ -386,8 +366,7 @@ public void randomizedStressTest() {
   @Test
   public void randomizedTestWithRecordsLargerThanPageSize() {
     final long pageSizeBytes = 128;
-    final BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, 64, pageSizeBytes);
+    final BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 64, pageSizeBytes);
     // Java arrays' hashCodes() aren't based on the arrays' contents, so we need to wrap arrays
     // into ByteBuffers in order to use them as keys here.
     final Map<ByteBuffer, byte[]> expected = new HashMap<ByteBuffer, byte[]>();
@@ -436,9 +415,9 @@ public void randomizedTestWithRecordsLargerThanPageSize() {
 
   @Test
   public void failureToAllocateFirstPage() {
-    shuffleMemoryManager = ShuffleMemoryManager.createForTesting(1024);
-    BytesToBytesMap map =
-      new BytesToBytesMap(taskMemoryManager, shuffleMemoryManager, 1, PAGE_SIZE_BYTES);
+    memoryManager.markExecutionAsOutOfMemory();
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1, PAGE_SIZE_BYTES);
+    memoryManager.markExecutionAsOutOfMemory();
     try {
       final long[] emptyArray = new long[0];
       final BytesToBytesMap.Location loc =
@@ -454,12 +433,14 @@ public void failureToAllocateFirstPage() {
 
   @Test
   public void failureToGrow() {
-    shuffleMemoryManager = ShuffleMemoryManager.createForTesting(1024 * 10);
-    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, shuffleMemoryManager, 1, 1024);
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1, 1024);
     try {
       boolean success = true;
       int i;
-      for (i = 0; i < 1024; i++) {
+      for (i = 0; i < 127; i++) {
+        if (i > 0) {
+          memoryManager.markExecutionAsOutOfMemory();
+        }
         final long[] arr = new long[]{i};
         final BytesToBytesMap.Location loc = map.lookup(arr, Platform.LONG_ARRAY_OFFSET, 8);
         success =
@@ -478,7 +459,7 @@ public void failureToGrow() {
   @Test
   public void initialCapacityBoundsChecking() {
     try {
-      new BytesToBytesMap(sizeLimitedTaskMemoryManager, shuffleMemoryManager, 0, PAGE_SIZE_BYTES);
+      new BytesToBytesMap(taskMemoryManager, 0, PAGE_SIZE_BYTES);
       Assert.fail("Expected IllegalArgumentException to be thrown");
     } catch (IllegalArgumentException e) {
       // expected exception
@@ -486,36 +467,13 @@ public void initialCapacityBoundsChecking() {
 
     try {
       new BytesToBytesMap(
-        sizeLimitedTaskMemoryManager,
-        shuffleMemoryManager,
+        taskMemoryManager,
         BytesToBytesMap.MAX_CAPACITY + 1,
         PAGE_SIZE_BYTES);
       Assert.fail("Expected IllegalArgumentException to be thrown");
     } catch (IllegalArgumentException e) {
       // expected exception
     }
-
-    // Ignored because this can OOM now that we allocate the long array w/o a TaskMemoryManager
-    // Can allocate _at_ the max capacity
-    //    BytesToBytesMap map = new BytesToBytesMap(
-    //      sizeLimitedTaskMemoryManager,
-    //      shuffleMemoryManager,
-    //      BytesToBytesMap.MAX_CAPACITY,
-    //      PAGE_SIZE_BYTES);
-    //    map.free();
-  }
-
-  // Ignored because this can OOM now that we allocate the long array w/o a TaskMemoryManager
-  @Ignore
-  public void resizingLargeMap() {
-    // As long as a map's capacity is below the max, we should be able to resize up to the max
-    BytesToBytesMap map = new BytesToBytesMap(
-      sizeLimitedTaskMemoryManager,
-      shuffleMemoryManager,
-      BytesToBytesMap.MAX_CAPACITY - 64,
-      PAGE_SIZE_BYTES);
-    map.growAndRehash();
-    map.free();
   }
 
   @Test
@@ -523,8 +481,7 @@ public void testPeakMemoryUsed() {
     final long recordLengthBytes = 24;
     final long pageSizeBytes = 256 + 8; // 8 bytes for end-of-page marker
     final long numRecordsPerPage = (pageSizeBytes - 8) / recordLengthBytes;
-    final BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, 1024, pageSizeBytes);
+    final BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1024, pageSizeBytes);
 
     // Since BytesToBytesMap is append-only, we expect the total memory consumption to be
     // monotonically increasing. More specifically, every time we allocate a new page it
@@ -564,8 +521,7 @@ public void testPeakMemoryUsed() {
 
   @Test
   public void testAcquirePageInConstructor() {
-    final BytesToBytesMap map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, 1, PAGE_SIZE_BYTES);
+    final BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1, PAGE_SIZE_BYTES);
     assertEquals(1, map.getNumDataPages());
     map.free();
   }
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOffHeapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOffHeapSuite.java
index 5a10de49f54f..f0bad4d760c1 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOffHeapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOffHeapSuite.java
@@ -17,13 +17,10 @@
 
 package org.apache.spark.unsafe.map;
 
-import org.apache.spark.unsafe.memory.MemoryAllocator;
-
 public class BytesToBytesMapOffHeapSuite extends AbstractBytesToBytesMapSuite {
 
   @Override
-  protected MemoryAllocator getMemoryAllocator() {
-    return MemoryAllocator.UNSAFE;
+  protected boolean useOffHeapMemoryAllocator() {
+    return true;
   }
-
 }
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOnHeapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOnHeapSuite.java
index 12cc9b25d93b..d76bb4fd05c5 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOnHeapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/BytesToBytesMapOnHeapSuite.java
@@ -17,13 +17,10 @@
 
 package org.apache.spark.unsafe.map;
 
-import org.apache.spark.unsafe.memory.MemoryAllocator;
-
 public class BytesToBytesMapOnHeapSuite extends AbstractBytesToBytesMapSuite {
 
   @Override
-  protected MemoryAllocator getMemoryAllocator() {
-    return MemoryAllocator.HEAP;
+  protected boolean useOffHeapMemoryAllocator() {
+    return false;
   }
-
 }
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
index a5bbaa95fa45..94d50b94fde3 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
@@ -46,20 +46,19 @@
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
 import org.apache.spark.executor.TaskMetrics;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.serializer.SerializerInstance;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.storage.*;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryAllocator;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 public class UnsafeExternalSorterSuite {
 
   final LinkedList<File> spillFilesCreated = new LinkedList<File>();
-  final TaskMemoryManager taskMemoryManager =
-    new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+  final GrantEverythingMemoryManager memoryManager =
+    new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"));
+  final TaskMemoryManager taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
   // Use integer comparison for comparing prefixes (which are partition ids, in this case)
   final PrefixComparator prefixComparator = new PrefixComparator() {
     @Override
@@ -82,7 +81,6 @@ public int compare(
 
   SparkConf sparkConf;
   File tempDir;
-  ShuffleMemoryManager shuffleMemoryManager;
   @Mock(answer = RETURNS_SMART_NULLS) BlockManager blockManager;
   @Mock(answer = RETURNS_SMART_NULLS) DiskBlockManager diskBlockManager;
   @Mock(answer = RETURNS_SMART_NULLS) TaskContext taskContext;
@@ -102,7 +100,6 @@ public void setUp() {
     MockitoAnnotations.initMocks(this);
     sparkConf = new SparkConf();
     tempDir = Utils.createTempDir(System.getProperty("java.io.tmpdir"), "unsafe-test");
-    shuffleMemoryManager = ShuffleMemoryManager.create(Long.MAX_VALUE, pageSizeBytes);
     spillFilesCreated.clear();
     taskContext = mock(TaskContext.class);
     when(taskContext.taskMetrics()).thenReturn(new TaskMetrics());
@@ -143,13 +140,7 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
   @After
   public void tearDown() {
     try {
-      long leakedUnsafeMemory = taskMemoryManager.cleanUpAllAllocatedMemory();
-      if (shuffleMemoryManager != null) {
-        long leakedShuffleMemory = shuffleMemoryManager.getMemoryConsumptionForThisTask();
-        shuffleMemoryManager = null;
-        assertEquals(0L, leakedShuffleMemory);
-      }
-      assertEquals(0, leakedUnsafeMemory);
+      assertEquals(0L, taskMemoryManager.cleanUpAllAllocatedMemory());
     } finally {
       Utils.deleteRecursively(tempDir);
       tempDir = null;
@@ -178,7 +169,6 @@ private static void insertRecord(
   private UnsafeExternalSorter newSorter() throws IOException {
     return UnsafeExternalSorter.create(
       taskMemoryManager,
-      shuffleMemoryManager,
       blockManager,
       taskContext,
       recordComparator,
@@ -236,12 +226,16 @@ public void testSortingEmptyArrays() throws Exception {
 
   @Test
   public void spillingOccursInResponseToMemoryPressure() throws Exception {
-    shuffleMemoryManager = ShuffleMemoryManager.create(pageSizeBytes * 2, pageSizeBytes);
     final UnsafeExternalSorter sorter = newSorter();
-    final int numRecords = (int) pageSizeBytes / 4;
-    for (int i = 0; i <= numRecords; i++) {
+    // This should be enough records to completely fill up a data page:
+    final int numRecords = (int) (pageSizeBytes / (4 + 4));
+    for (int i = 0; i < numRecords; i++) {
       insertNumber(sorter, numRecords - i);
     }
+    assertEquals(1, sorter.getNumberOfAllocatedPages());
+    memoryManager.markExecutionAsOutOfMemory();
+    // The insertion of this record should trigger a spill:
+    insertNumber(sorter, 0);
     // Ensure that spill files were created
     assertThat(tempDir.listFiles().length, greaterThanOrEqualTo(1));
     // Read back the sorted data:
@@ -255,6 +249,7 @@ public void spillingOccursInResponseToMemoryPressure() throws Exception {
       assertEquals(i, Platform.getInt(iter.getBaseObject(), iter.getBaseOffset()));
       i++;
     }
+    assertEquals(numRecords + 1, i);
     sorter.cleanupResources();
     assertSpillFilesWereCleanedUp();
   }
@@ -323,7 +318,6 @@ public void testPeakMemoryUsed() throws Exception {
     final long numRecordsPerPage = pageSizeBytes / recordLengthBytes;
     final UnsafeExternalSorter sorter = UnsafeExternalSorter.create(
       taskMemoryManager,
-      shuffleMemoryManager,
       blockManager,
       taskContext,
       recordComparator,
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
index 778e813df6b5..d5de56a0512f 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
@@ -26,11 +26,11 @@
 import static org.mockito.Mockito.mock;
 
 import org.apache.spark.HashPartitioner;
+import org.apache.spark.SparkConf;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.memory.ExecutorMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryAllocator;
+import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 public class UnsafeInMemorySorterSuite {
 
@@ -43,7 +43,8 @@ private static String getStringFromDataPage(Object baseObject, long baseOffset,
   @Test
   public void testSortingEmptyInput() {
     final UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP)),
+      new TaskMemoryManager(
+        new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0),
       mock(RecordComparator.class),
       mock(PrefixComparator.class),
       100);
@@ -64,8 +65,8 @@ public void testSortingOnlyByIntegerPrefix() throws Exception {
       "Lychee",
       "Mango"
     };
-    final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP));
+    final TaskMemoryManager memoryManager = new TaskMemoryManager(
+      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
     final MemoryBlock dataPage = memoryManager.allocatePage(2048);
     final Object baseObject = dataPage.getBaseObject();
     // Write the records into the data page:
diff --git a/core/src/test/scala/org/apache/spark/FailureSuite.scala b/core/src/test/scala/org/apache/spark/FailureSuite.scala
index f58756e6f617..0242cbc9244a 100644
--- a/core/src/test/scala/org/apache/spark/FailureSuite.scala
+++ b/core/src/test/scala/org/apache/spark/FailureSuite.scala
@@ -149,7 +149,7 @@ class FailureSuite extends SparkFunSuite with LocalSparkContext {
     // cause is preserved
     val thrownDueToTaskFailure = intercept[SparkException] {
       sc.parallelize(Seq(0)).mapPartitions { iter =>
-        TaskContext.get().taskMemoryManager().allocate(128)
+        TaskContext.get().taskMemoryManager().allocatePage(128)
         throw new Exception("intentional task failure")
         iter
       }.count()
@@ -159,7 +159,7 @@ class FailureSuite extends SparkFunSuite with LocalSparkContext {
     // If the task succeeded but memory was leaked, then the task should fail due to that leak
     val thrownDueToMemoryLeak = intercept[SparkException] {
       sc.parallelize(Seq(0)).mapPartitions { iter =>
-        TaskContext.get().taskMemoryManager().allocate(128)
+        TaskContext.get().taskMemoryManager().allocatePage(128)
         iter
       }.count()
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala b/core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala
similarity index 56%
rename from sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
rename to core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala
index c4358f409b6e..fe102d8aeb2a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TestShuffleMemoryManager.scala
+++ b/core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala
@@ -15,51 +15,25 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.execution
+package org.apache.spark.memory
 
 import scala.collection.mutable
 
-import org.apache.spark.memory.MemoryManager
-import org.apache.spark.shuffle.ShuffleMemoryManager
-import org.apache.spark.storage.{BlockId, BlockStatus}
+import org.apache.spark.SparkConf
+import org.apache.spark.storage.{BlockStatus, BlockId}
 
-
-/**
- * A [[ShuffleMemoryManager]] that can be controlled to run out of memory.
- */
-class TestShuffleMemoryManager
-  extends ShuffleMemoryManager(new GrantEverythingMemoryManager, 4 * 1024 * 1024) {
-  private var oom = false
-
-  override def tryToAcquire(numBytes: Long): Long = {
+class GrantEverythingMemoryManager(conf: SparkConf) extends MemoryManager(conf, numCores = 1) {
+  private[memory] override def doAcquireExecutionMemory(
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
     if (oom) {
       oom = false
       0
     } else {
-      // Uncomment the following to trace memory allocations.
-      // println(s"tryToAcquire $numBytes in " +
-      //   Thread.currentThread().getStackTrace.mkString("", "\n  -", ""))
-      val acquired = super.tryToAcquire(numBytes)
-      acquired
+      _executionMemoryUsed += numBytes // To suppress warnings when freeing unallocated memory
+      numBytes
     }
   }
-
-  override def release(numBytes: Long): Unit = {
-    // Uncomment the following to trace memory releases.
-    // println(s"release $numBytes in " +
-    //   Thread.currentThread().getStackTrace.mkString("", "\n  -", ""))
-    super.release(numBytes)
-  }
-
-  def markAsOutOfMemory(): Unit = {
-    oom = true
-  }
-}
-
-private class GrantEverythingMemoryManager extends MemoryManager {
-  override def acquireExecutionMemory(
-      numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = numBytes
   override def acquireStorageMemory(
       blockId: BlockId,
       numBytes: Long,
@@ -68,8 +42,13 @@ private class GrantEverythingMemoryManager extends MemoryManager {
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
-  override def releaseExecutionMemory(numBytes: Long): Unit = { }
   override def releaseStorageMemory(numBytes: Long): Unit = { }
   override def maxExecutionMemory: Long = Long.MaxValue
   override def maxStorageMemory: Long = Long.MaxValue
+
+  private var oom = false
+
+  def markExecutionAsOutOfMemory(): Unit = {
+    oom = true
+  }
 }
diff --git a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
index 36e456631071..1265087743a9 100644
--- a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
@@ -19,10 +19,14 @@ package org.apache.spark.memory
 
 import java.util.concurrent.atomic.AtomicLong
 
+import scala.concurrent.duration.Duration
+import scala.concurrent.{Await, ExecutionContext, Future}
+
 import org.mockito.Matchers.{any, anyLong}
 import org.mockito.Mockito.{mock, when}
 import org.mockito.invocation.InvocationOnMock
 import org.mockito.stubbing.Answer
+import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.storage.MemoryStore
@@ -126,6 +130,136 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     assert(ensureFreeSpaceCalled.get() === DEFAULT_ENSURE_FREE_SPACE_CALLED,
       "ensure free space should not have been called!")
   }
+
+  /**
+   * Create a MemoryManager with the specified execution memory limit and no storage memory.
+   */
+  protected def createMemoryManager(maxExecutionMemory: Long): MemoryManager
+
+  // -- Tests of sharing of execution memory between tasks ----------------------------------------
+  // Prior to Spark 1.6, these tests were part of ShuffleMemoryManagerSuite.
+
+  implicit val ec = ExecutionContext.global
+
+  test("single task requesting execution memory") {
+    val manager = createMemoryManager(1000L)
+    val taskMemoryManager = new TaskMemoryManager(manager, 0)
+
+    assert(taskMemoryManager.acquireExecutionMemory(100L) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(200L) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
+
+    taskMemoryManager.releaseExecutionMemory(500L)
+    assert(taskMemoryManager.acquireExecutionMemory(300L) === 300L)
+    assert(taskMemoryManager.acquireExecutionMemory(300L) === 200L)
+
+    taskMemoryManager.cleanUpAllAllocatedMemory()
+    assert(taskMemoryManager.acquireExecutionMemory(1000L) === 1000L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
+  }
+
+  test("two tasks requesting full execution memory") {
+    val memoryManager = createMemoryManager(1000L)
+    val t1MemManager = new TaskMemoryManager(memoryManager, 1)
+    val t2MemManager = new TaskMemoryManager(memoryManager, 2)
+    val futureTimeout: Duration = 20.seconds
+
+    // Have both tasks request 500 bytes, then wait until both requests have been granted:
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(500L) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    assert(Await.result(t1Result1, futureTimeout) === 500L)
+    assert(Await.result(t2Result1, futureTimeout) === 500L)
+
+    // Have both tasks each request 500 bytes more; both should immediately return 0 as they are
+    // both now at 1 / N
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    assert(Await.result(t1Result2, 200.millis) === 0L)
+    assert(Await.result(t2Result2, 200.millis) === 0L)
+  }
+
+  test("two tasks cannot grow past 1 / N of execution memory") {
+    val memoryManager = createMemoryManager(1000L)
+    val t1MemManager = new TaskMemoryManager(memoryManager, 1)
+    val t2MemManager = new TaskMemoryManager(memoryManager, 2)
+    val futureTimeout: Duration = 20.seconds
+
+    // Have both tasks request 250 bytes, then wait until both requests have been granted:
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(250L) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L) }
+    assert(Await.result(t1Result1, futureTimeout) === 250L)
+    assert(Await.result(t2Result1, futureTimeout) === 250L)
+
+    // Have both tasks each request 500 bytes more.
+    // We should only grant 250 bytes to each of them on this second request
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    assert(Await.result(t1Result2, futureTimeout) === 250L)
+    assert(Await.result(t2Result2, futureTimeout) === 250L)
+  }
+
+  test("tasks can block to get at least 1 / 2N of execution memory") {
+    val memoryManager = createMemoryManager(1000L)
+    val t1MemManager = new TaskMemoryManager(memoryManager, 1)
+    val t2MemManager = new TaskMemoryManager(memoryManager, 2)
+    val futureTimeout: Duration = 20.seconds
+
+    // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L) }
+    assert(Await.result(t1Result1, futureTimeout) === 1000L)
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L) }
+    // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
+    // to make sure the other thread blocks for some time otherwise.
+    Thread.sleep(300)
+    t1MemManager.releaseExecutionMemory(250L)
+    // The memory freed from t1 should now be granted to t2.
+    assert(Await.result(t2Result1, futureTimeout) === 250L)
+    // Further requests by t2 should be denied immediately because it now has 1 / 2N of the memory.
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(100L) }
+    assert(Await.result(t2Result2, 200.millis) === 0L)
+  }
+
+  test("TaskMemoryManager.cleanUpAllAllocatedMemory") {
+    val memoryManager = createMemoryManager(1000L)
+    val t1MemManager = new TaskMemoryManager(memoryManager, 1)
+    val t2MemManager = new TaskMemoryManager(memoryManager, 2)
+    val futureTimeout: Duration = 20.seconds
+
+    // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L) }
+    assert(Await.result(t1Result1, futureTimeout) === 1000L)
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
+    // to make sure the other thread blocks for some time otherwise.
+    Thread.sleep(300)
+    // t1 releases all of its memory, so t2 should be able to grab all of the memory
+    t1MemManager.cleanUpAllAllocatedMemory()
+    assert(Await.result(t2Result1, futureTimeout) === 500L)
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    assert(Await.result(t2Result2, futureTimeout) === 500L)
+    val t2Result3 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    assert(Await.result(t2Result3, 200.millis) === 0L)
+  }
+
+  test("tasks should not be granted a negative amount of execution memory") {
+    // This is a regression test for SPARK-4715.
+    val memoryManager = createMemoryManager(1000L)
+    val t1MemManager = new TaskMemoryManager(memoryManager, 1)
+    val t2MemManager = new TaskMemoryManager(memoryManager, 2)
+    val futureTimeout: Duration = 20.seconds
+
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(700L) }
+    assert(Await.result(t1Result1, futureTimeout) === 700L)
+
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(300L) }
+    assert(Await.result(t2Result1, futureTimeout) === 300L)
+
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(300L) }
+    assert(Await.result(t1Result2, 200.millis) === 0L)
+  }
 }
 
 private object MemoryManagerSuite {
diff --git a/core/src/test/scala/org/apache/spark/memory/MemoryTestingUtils.scala b/core/src/test/scala/org/apache/spark/memory/MemoryTestingUtils.scala
new file mode 100644
index 000000000000..4b4c3b031132
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/memory/MemoryTestingUtils.scala
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import org.apache.spark.{SparkEnv, TaskContextImpl, TaskContext}
+
+/**
+ * Helper methods for mocking out memory-management-related classes in tests.
+ */
+object MemoryTestingUtils {
+  def fakeTaskContext(env: SparkEnv): TaskContext = {
+    val taskMemoryManager = new TaskMemoryManager(env.memoryManager, 0)
+    new TaskContextImpl(
+      stageId = 0,
+      partitionId = 0,
+      taskAttemptId = 0,
+      attemptNumber = 0,
+      taskMemoryManager = taskMemoryManager,
+      metricsSystem = env.metricsSystem,
+      internalAccumulators = Seq.empty)
+  }
+}
diff --git a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
index 6cae1f871e24..885c450d6d4f 100644
--- a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
@@ -36,27 +36,35 @@ class StaticMemoryManagerSuite extends MemoryManagerSuite {
       maxExecutionMem: Long,
       maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
     val mm = new StaticMemoryManager(
-      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem)
+      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem, numCores = 1)
     val ms = makeMemoryStore(mm)
     (mm, ms)
   }
 
+  override protected def createMemoryManager(maxMemory: Long): MemoryManager = {
+    new StaticMemoryManager(
+      conf,
+      maxExecutionMemory = maxMemory,
+      maxStorageMemory = 0,
+      numCores = 1)
+  }
+
   test("basic execution memory") {
     val maxExecutionMem = 1000L
     val (mm, _) = makeThings(maxExecutionMem, Long.MaxValue)
     assert(mm.executionMemoryUsed === 0L)
-    assert(mm.acquireExecutionMemory(10L, evictedBlocks) === 10L)
+    assert(mm.doAcquireExecutionMemory(10L, evictedBlocks) === 10L)
     assert(mm.executionMemoryUsed === 10L)
-    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
     // Acquire up to the max
-    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 890L)
+    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 890L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
-    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 0L)
+    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 0L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
     mm.releaseExecutionMemory(800L)
     assert(mm.executionMemoryUsed === 200L)
     // Acquire after release
-    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 1L)
+    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 1L)
     assert(mm.executionMemoryUsed === 201L)
     // Release beyond what was acquired
     mm.releaseExecutionMemory(maxExecutionMem)
@@ -108,10 +116,10 @@ class StaticMemoryManagerSuite extends MemoryManagerSuite {
     val dummyBlock = TestBlockId("ain't nobody love like you do")
     val (mm, ms) = makeThings(maxExecutionMem, maxStorageMem)
     // Only execution memory should increase
-    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 100L)
-    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 100L)
+    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 200L)
     // Only storage memory should increase
diff --git a/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
index e7baa50dc2cd..0c97f2bd8965 100644
--- a/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
@@ -34,11 +34,15 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
    * Make a [[UnifiedMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
    */
   private def makeThings(maxMemory: Long): (UnifiedMemoryManager, MemoryStore) = {
-    val mm = new UnifiedMemoryManager(conf, maxMemory)
+    val mm = new UnifiedMemoryManager(conf, maxMemory, numCores = 1)
     val ms = makeMemoryStore(mm)
     (mm, ms)
   }
 
+  override protected def createMemoryManager(maxMemory: Long): MemoryManager = {
+    new UnifiedMemoryManager(conf, maxMemory, numCores = 1)
+  }
+
   private def getStorageRegionSize(mm: UnifiedMemoryManager): Long = {
     mm invokePrivate PrivateMethod[Long]('storageRegionSize)()
   }
@@ -56,18 +60,18 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
     val maxMemory = 1000L
     val (mm, _) = makeThings(maxMemory)
     assert(mm.executionMemoryUsed === 0L)
-    assert(mm.acquireExecutionMemory(10L, evictedBlocks) === 10L)
+    assert(mm.doAcquireExecutionMemory(10L, evictedBlocks) === 10L)
     assert(mm.executionMemoryUsed === 10L)
-    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
     // Acquire up to the max
-    assert(mm.acquireExecutionMemory(1000L, evictedBlocks) === 890L)
+    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 890L)
     assert(mm.executionMemoryUsed === maxMemory)
-    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 0L)
+    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 0L)
     assert(mm.executionMemoryUsed === maxMemory)
     mm.releaseExecutionMemory(800L)
     assert(mm.executionMemoryUsed === 200L)
     // Acquire after release
-    assert(mm.acquireExecutionMemory(1L, evictedBlocks) === 1L)
+    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 1L)
     assert(mm.executionMemoryUsed === 201L)
     // Release beyond what was acquired
     mm.releaseExecutionMemory(maxMemory)
@@ -132,12 +136,12 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
     require(mm.storageMemoryUsed > storageRegionSize,
       s"bad test: storage memory used should exceed the storage region")
     // Execution needs to request 250 bytes to evict storage memory
-    assert(mm.acquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
     assert(mm.executionMemoryUsed === 100L)
     assert(mm.storageMemoryUsed === 750L)
     assertEnsureFreeSpaceNotCalled(ms)
     // Execution wants 200 bytes but only 150 are free, so storage is evicted
-    assert(mm.acquireExecutionMemory(200L, evictedBlocks) === 200L)
+    assert(mm.doAcquireExecutionMemory(200L, evictedBlocks) === 200L)
     assertEnsureFreeSpaceCalled(ms, 200L)
     assert(mm.executionMemoryUsed === 300L)
     mm.releaseAllStorageMemory()
@@ -151,7 +155,7 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
       s"bad test: storage memory used should be within the storage region")
     // Execution cannot evict storage because the latter is within the storage fraction,
     // so grant only what's remaining without evicting anything, i.e. 1000 - 300 - 400 = 300
-    assert(mm.acquireExecutionMemory(400L, evictedBlocks) === 300L)
+    assert(mm.doAcquireExecutionMemory(400L, evictedBlocks) === 300L)
     assert(mm.executionMemoryUsed === 600L)
     assert(mm.storageMemoryUsed === 400L)
     assertEnsureFreeSpaceNotCalled(ms)
@@ -170,7 +174,7 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
     require(executionRegionSize === expectedExecutionRegionSize,
       "bad test: storage region size is unexpected")
     // Acquire enough execution memory to exceed the execution region
-    assert(mm.acquireExecutionMemory(800L, evictedBlocks) === 800L)
+    assert(mm.doAcquireExecutionMemory(800L, evictedBlocks) === 800L)
     assert(mm.executionMemoryUsed === 800L)
     assert(mm.storageMemoryUsed === 0L)
     assertEnsureFreeSpaceNotCalled(ms)
@@ -188,7 +192,7 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
     mm.releaseExecutionMemory(maxMemory)
     mm.releaseStorageMemory(maxMemory)
     // Acquire some execution memory again, but this time keep it within the execution region
-    assert(mm.acquireExecutionMemory(200L, evictedBlocks) === 200L)
+    assert(mm.doAcquireExecutionMemory(200L, evictedBlocks) === 200L)
     assert(mm.executionMemoryUsed === 200L)
     assert(mm.storageMemoryUsed === 0L)
     assertEnsureFreeSpaceNotCalled(ms)
diff --git a/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
deleted file mode 100644
index 5877aa042d4a..000000000000
--- a/core/src/test/scala/org/apache/spark/shuffle/ShuffleMemoryManagerSuite.scala
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.shuffle
-
-import java.util.concurrent.CountDownLatch
-import java.util.concurrent.atomic.AtomicInteger
-
-import org.mockito.Mockito._
-import org.scalatest.concurrent.Timeouts
-import org.scalatest.time.SpanSugar._
-
-import org.apache.spark.{SparkFunSuite, TaskContext}
-import org.apache.spark.executor.TaskMetrics
-
-class ShuffleMemoryManagerSuite extends SparkFunSuite with Timeouts {
-
-  val nextTaskAttemptId = new AtomicInteger()
-
-  /** Launch a thread with the given body block and return it. */
-  private def startThread(name: String)(body: => Unit): Thread = {
-    val thread = new Thread("ShuffleMemorySuite " + name) {
-      override def run() {
-        try {
-          val taskAttemptId = nextTaskAttemptId.getAndIncrement
-          val mockTaskContext = mock(classOf[TaskContext], RETURNS_SMART_NULLS)
-          val taskMetrics = new TaskMetrics
-          when(mockTaskContext.taskAttemptId()).thenReturn(taskAttemptId)
-          when(mockTaskContext.taskMetrics()).thenReturn(taskMetrics)
-          TaskContext.setTaskContext(mockTaskContext)
-          body
-        } finally {
-          TaskContext.unset()
-        }
-      }
-    }
-    thread.start()
-    thread
-  }
-
-  test("single task requesting memory") {
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-
-    assert(manager.tryToAcquire(100L) === 100L)
-    assert(manager.tryToAcquire(400L) === 400L)
-    assert(manager.tryToAcquire(400L) === 400L)
-    assert(manager.tryToAcquire(200L) === 100L)
-    assert(manager.tryToAcquire(100L) === 0L)
-    assert(manager.tryToAcquire(100L) === 0L)
-
-    manager.release(500L)
-    assert(manager.tryToAcquire(300L) === 300L)
-    assert(manager.tryToAcquire(300L) === 200L)
-
-    manager.releaseMemoryForThisTask()
-    assert(manager.tryToAcquire(1000L) === 1000L)
-    assert(manager.tryToAcquire(100L) === 0L)
-  }
-
-  test("two threads requesting full memory") {
-    // Two threads request 500 bytes first, wait for each other to get it, and then request
-    // 500 more; we should immediately return 0 as both are now at 1 / N
-
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-
-    class State {
-      var t1Result1 = -1L
-      var t2Result1 = -1L
-      var t1Result2 = -1L
-      var t2Result2 = -1L
-    }
-    val state = new State
-
-    val t1 = startThread("t1") {
-      val r1 = manager.tryToAcquire(500L)
-      state.synchronized {
-        state.t1Result1 = r1
-        state.notifyAll()
-        while (state.t2Result1 === -1L) {
-          state.wait()
-        }
-      }
-      val r2 = manager.tryToAcquire(500L)
-      state.synchronized { state.t1Result2 = r2 }
-    }
-
-    val t2 = startThread("t2") {
-      val r1 = manager.tryToAcquire(500L)
-      state.synchronized {
-        state.t2Result1 = r1
-        state.notifyAll()
-        while (state.t1Result1 === -1L) {
-          state.wait()
-        }
-      }
-      val r2 = manager.tryToAcquire(500L)
-      state.synchronized { state.t2Result2 = r2 }
-    }
-
-    failAfter(20 seconds) {
-      t1.join()
-      t2.join()
-    }
-
-    assert(state.t1Result1 === 500L)
-    assert(state.t2Result1 === 500L)
-    assert(state.t1Result2 === 0L)
-    assert(state.t2Result2 === 0L)
-  }
-
-
-  test("tasks cannot grow past 1 / N") {
-    // Two tasks request 250 bytes first, wait for each other to get it, and then request
-    // 500 more; we should only grant 250 bytes to each of them on this second request
-
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-
-    class State {
-      var t1Result1 = -1L
-      var t2Result1 = -1L
-      var t1Result2 = -1L
-      var t2Result2 = -1L
-    }
-    val state = new State
-
-    val t1 = startThread("t1") {
-      val r1 = manager.tryToAcquire(250L)
-      state.synchronized {
-        state.t1Result1 = r1
-        state.notifyAll()
-        while (state.t2Result1 === -1L) {
-          state.wait()
-        }
-      }
-      val r2 = manager.tryToAcquire(500L)
-      state.synchronized { state.t1Result2 = r2 }
-    }
-
-    val t2 = startThread("t2") {
-      val r1 = manager.tryToAcquire(250L)
-      state.synchronized {
-        state.t2Result1 = r1
-        state.notifyAll()
-        while (state.t1Result1 === -1L) {
-          state.wait()
-        }
-      }
-      val r2 = manager.tryToAcquire(500L)
-      state.synchronized { state.t2Result2 = r2 }
-    }
-
-    failAfter(20 seconds) {
-      t1.join()
-      t2.join()
-    }
-
-    assert(state.t1Result1 === 250L)
-    assert(state.t2Result1 === 250L)
-    assert(state.t1Result2 === 250L)
-    assert(state.t2Result2 === 250L)
-  }
-
-  test("tasks can block to get at least 1 / 2N memory") {
-    // t1 grabs 1000 bytes and then waits until t2 is ready to make a request. It sleeps
-    // for a bit and releases 250 bytes, which should then be granted to t2. Further requests
-    // by t2 will return false right away because it now has 1 / 2N of the memory.
-
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-
-    class State {
-      var t1Requested = false
-      var t2Requested = false
-      var t1Result = -1L
-      var t2Result = -1L
-      var t2Result2 = -1L
-      var t2WaitTime = 0L
-    }
-    val state = new State
-
-    val t1 = startThread("t1") {
-      state.synchronized {
-        state.t1Result = manager.tryToAcquire(1000L)
-        state.t1Requested = true
-        state.notifyAll()
-        while (!state.t2Requested) {
-          state.wait()
-        }
-      }
-      // Sleep a bit before releasing our memory; this is hacky but it would be difficult to make
-      // sure the other thread blocks for some time otherwise
-      Thread.sleep(300)
-      manager.release(250L)
-    }
-
-    val t2 = startThread("t2") {
-      state.synchronized {
-        while (!state.t1Requested) {
-          state.wait()
-        }
-        state.t2Requested = true
-        state.notifyAll()
-      }
-      val startTime = System.currentTimeMillis()
-      val result = manager.tryToAcquire(250L)
-      val endTime = System.currentTimeMillis()
-      state.synchronized {
-        state.t2Result = result
-        // A second call should return 0 because we're now already at 1 / 2N
-        state.t2Result2 = manager.tryToAcquire(100L)
-        state.t2WaitTime = endTime - startTime
-      }
-    }
-
-    failAfter(20 seconds) {
-      t1.join()
-      t2.join()
-    }
-
-    // Both threads should've been able to acquire their memory; the second one will have waited
-    // until the first one acquired 1000 bytes and then released 250
-    state.synchronized {
-      assert(state.t1Result === 1000L, "t1 could not allocate memory")
-      assert(state.t2Result === 250L, "t2 could not allocate memory")
-      assert(state.t2WaitTime > 200, s"t2 waited less than 200 ms (${state.t2WaitTime})")
-      assert(state.t2Result2 === 0L, "t1 got extra memory the second time")
-    }
-  }
-
-  test("releaseMemoryForThisTask") {
-    // t1 grabs 1000 bytes and then waits until t2 is ready to make a request. It sleeps
-    // for a bit and releases all its memory. t2 should now be able to grab all the memory.
-
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-
-    class State {
-      var t1Requested = false
-      var t2Requested = false
-      var t1Result = -1L
-      var t2Result1 = -1L
-      var t2Result2 = -1L
-      var t2Result3 = -1L
-      var t2WaitTime = 0L
-    }
-    val state = new State
-
-    val t1 = startThread("t1") {
-      state.synchronized {
-        state.t1Result = manager.tryToAcquire(1000L)
-        state.t1Requested = true
-        state.notifyAll()
-        while (!state.t2Requested) {
-          state.wait()
-        }
-      }
-      // Sleep a bit before releasing our memory; this is hacky but it would be difficult to make
-      // sure the other task blocks for some time otherwise
-      Thread.sleep(300)
-      manager.releaseMemoryForThisTask()
-    }
-
-    val t2 = startThread("t2") {
-      state.synchronized {
-        while (!state.t1Requested) {
-          state.wait()
-        }
-        state.t2Requested = true
-        state.notifyAll()
-      }
-      val startTime = System.currentTimeMillis()
-      val r1 = manager.tryToAcquire(500L)
-      val endTime = System.currentTimeMillis()
-      val r2 = manager.tryToAcquire(500L)
-      val r3 = manager.tryToAcquire(500L)
-      state.synchronized {
-        state.t2Result1 = r1
-        state.t2Result2 = r2
-        state.t2Result3 = r3
-        state.t2WaitTime = endTime - startTime
-      }
-    }
-
-    failAfter(20 seconds) {
-      t1.join()
-      t2.join()
-    }
-
-    // Both tasks should've been able to acquire their memory; the second one will have waited
-    // until the first one acquired 1000 bytes and then released all of it
-    state.synchronized {
-      assert(state.t1Result === 1000L, "t1 could not allocate memory")
-      assert(state.t2Result1 === 500L, "t2 didn't get 500 bytes the first time")
-      assert(state.t2Result2 === 500L, "t2 didn't get 500 bytes the second time")
-      assert(state.t2Result3 === 0L, s"t2 got more bytes a third time (${state.t2Result3})")
-      assert(state.t2WaitTime > 200, s"t2 waited less than 200 ms (${state.t2WaitTime})")
-    }
-  }
-
-  test("tasks should not be granted a negative size") {
-    val manager = ShuffleMemoryManager.createForTesting(maxMemory = 1000L)
-    manager.tryToAcquire(700L)
-
-    val latch = new CountDownLatch(1)
-    startThread("t1") {
-      manager.tryToAcquire(300L)
-      latch.countDown()
-    }
-    latch.await() // Wait until `t1` calls `tryToAcquire`
-
-    val granted = manager.tryToAcquire(300L)
-    assert(0 === granted, "granted is negative")
-  }
-}
diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
index cc44c676b27a..6e3f500e15dc 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerReplicationSuite.scala
@@ -61,7 +61,7 @@ class BlockManagerReplicationSuite extends SparkFunSuite with Matchers with Befo
       maxMem: Long,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem, numCores = 1)
     val store = new BlockManager(name, rpcEnv, master, serializer, conf,
       memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
     memManager.setMemoryStore(store.memoryStore)
@@ -261,7 +261,7 @@ class BlockManagerReplicationSuite extends SparkFunSuite with Matchers with Befo
     val failableTransfer = mock(classOf[BlockTransferService]) // this wont actually work
     when(failableTransfer.hostName).thenReturn("some-hostname")
     when(failableTransfer.port).thenReturn(1000)
-    val memManager = new StaticMemoryManager(conf, Long.MaxValue, 10000)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, 10000, numCores = 1)
     val failableStore = new BlockManager("failable-store", rpcEnv, master, serializer, conf,
       memManager, mapOutputTracker, shuffleManager, failableTransfer, securityMgr, 0)
     memManager.setMemoryStore(failableStore.memoryStore)
diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
index f3fab33ca2e3..d49015afcd59 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
@@ -68,7 +68,7 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
       maxMem: Long,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem, numCores = 1)
     val blockManager = new BlockManager(name, rpcEnv, master, serializer, conf,
       memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
     memManager.setMemoryStore(blockManager.memoryStore)
@@ -823,7 +823,11 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
   test("block store put failure") {
     // Use Java serializer so we can create an unserializable error.
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
-    val memoryManager = new StaticMemoryManager(conf, Long.MaxValue, 1200)
+    val memoryManager = new StaticMemoryManager(
+      conf,
+      maxExecutionMemory = Long.MaxValue,
+      maxStorageMemory = 1200,
+      numCores = 1)
     store = new BlockManager(SparkContext.DRIVER_IDENTIFIER, rpcEnv, master,
       new JavaSerializer(conf), conf, memoryManager, mapOutputTracker,
       shuffleManager, transfer, securityMgr, 0)
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
index 5cb506ea2164..dc3185a6d505 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalAppendOnlyMapSuite.scala
@@ -21,7 +21,7 @@ import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark._
 import org.apache.spark.io.CompressionCodec
-
+import org.apache.spark.memory.MemoryTestingUtils
 
 class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
   import TestUtils.{assertNotSpilled, assertSpilled}
@@ -32,8 +32,11 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
   private def mergeCombiners[T](buf1: ArrayBuffer[T], buf2: ArrayBuffer[T]): ArrayBuffer[T] =
     buf1 ++= buf2
 
-  private def createExternalMap[T] = new ExternalAppendOnlyMap[T, T, ArrayBuffer[T]](
-    createCombiner[T], mergeValue[T], mergeCombiners[T])
+  private def createExternalMap[T] = {
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
+    new ExternalAppendOnlyMap[T, T, ArrayBuffer[T]](
+      createCombiner[T], mergeValue[T], mergeCombiners[T], context = context)
+  }
 
   private def createSparkConf(loadDefaults: Boolean, codec: Option[String] = None): SparkConf = {
     val conf = new SparkConf(loadDefaults)
@@ -49,23 +52,27 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
     conf
   }
 
-  test("simple insert") {
+  test("single insert insert") {
     val conf = createSparkConf(loadDefaults = false)
     sc = new SparkContext("local", "test", conf)
     val map = createExternalMap[Int]
-
-    // Single insert
     map.insert(1, 10)
-    var it = map.iterator
+    val it = map.iterator
     assert(it.hasNext)
     val kv = it.next()
     assert(kv._1 === 1 && kv._2 === ArrayBuffer[Int](10))
     assert(!it.hasNext)
+    sc.stop()
+  }
 
-    // Multiple insert
+  test("multiple insert") {
+    val conf = createSparkConf(loadDefaults = false)
+    sc = new SparkContext("local", "test", conf)
+    val map = createExternalMap[Int]
+    map.insert(1, 10)
     map.insert(2, 20)
     map.insert(3, 30)
-    it = map.iterator
+    val it = map.iterator
     assert(it.hasNext)
     assert(it.toSet === Set[(Int, ArrayBuffer[Int])](
       (1, ArrayBuffer[Int](10)),
@@ -144,39 +151,22 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
     sc = new SparkContext("local", "test", conf)
 
     val map = createExternalMap[Int]
+    val nullInt = null.asInstanceOf[Int]
     map.insert(1, 5)
     map.insert(2, 6)
     map.insert(3, 7)
-    assert(map.size === 3)
-    assert(map.iterator.toSet === Set[(Int, Seq[Int])](
-      (1, Seq[Int](5)),
-      (2, Seq[Int](6)),
-      (3, Seq[Int](7))
-    ))
-
-    // Null keys
-    val nullInt = null.asInstanceOf[Int]
+    map.insert(4, nullInt)
     map.insert(nullInt, 8)
-    assert(map.size === 4)
-    assert(map.iterator.toSet === Set[(Int, Seq[Int])](
+    map.insert(nullInt, nullInt)
+      val result = map.iterator.toSet[(Int, ArrayBuffer[Int])].map(kv => (kv._1, kv._2.sorted))
+    assert(result === Set[(Int, Seq[Int])](
       (1, Seq[Int](5)),
       (2, Seq[Int](6)),
       (3, Seq[Int](7)),
-      (nullInt, Seq[Int](8))
+      (4, Seq[Int](nullInt)),
+      (nullInt, Seq[Int](nullInt, 8))
     ))
 
-    // Null values
-    map.insert(4, nullInt)
-    map.insert(nullInt, nullInt)
-    assert(map.size === 5)
-    val result = map.iterator.toSet[(Int, ArrayBuffer[Int])].map(kv => (kv._1, kv._2.toSet))
-    assert(result === Set[(Int, Set[Int])](
-      (1, Set[Int](5)),
-      (2, Set[Int](6)),
-      (3, Set[Int](7)),
-      (4, Set[Int](nullInt)),
-      (nullInt, Set[Int](nullInt, 8))
-    ))
     sc.stop()
   }
 
@@ -344,7 +334,9 @@ class ExternalAppendOnlyMapSuite extends SparkFunSuite with LocalSparkContext {
     val conf = createSparkConf(loadDefaults = true)
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
-    val map = new ExternalAppendOnlyMap[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
+    val map =
+      new ExternalAppendOnlyMap[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _, context = context)
 
     // Insert 10 copies each of lots of objects whose hash codes are either 0 or 1. This causes
     // problems if the map fails to group together the objects with the same code (SPARK-2043).
diff --git a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
index e2cb791771d9..d7b2d07a4005 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/ExternalSorterSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.util.collection
 
+import org.apache.spark.memory.MemoryTestingUtils
+
 import scala.collection.mutable.ArrayBuffer
 import scala.util.Random
 
@@ -98,6 +100,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val conf = createSparkConf(loadDefaults = true, kryo = false)
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
     def mergeValue(buffer: ArrayBuffer[String], i: String): ArrayBuffer[String] = buffer += i
@@ -109,7 +112,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       createCombiner _, mergeValue _, mergeCombiners _)
 
     val sorter = new ExternalSorter[String, String, ArrayBuffer[String]](
-      Some(agg), None, None, None)
+      context, Some(agg), None, None, None)
 
     val collisionPairs = Seq(
       ("Aa", "BB"),                   // 2112
@@ -158,8 +161,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val conf = createSparkConf(loadDefaults = true, kryo = false)
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
     val agg = new Aggregator[FixedHashObject, Int, Int](_ => 1, _ + _, _ + _)
-    val sorter = new ExternalSorter[FixedHashObject, Int, Int](Some(agg), None, None, None)
+    val sorter = new ExternalSorter[FixedHashObject, Int, Int](context, Some(agg), None, None, None)
     // Insert 10 copies each of lots of objects whose hash codes are either 0 or 1. This causes
     // problems if the map fails to group together the objects with the same code (SPARK-2043).
     val toInsert = for (i <- 1 to 10; j <- 1 to size) yield (FixedHashObject(j, j % 2), 1)
@@ -180,6 +184,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val conf = createSparkConf(loadDefaults = true, kryo = false)
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     def createCombiner(i: Int): ArrayBuffer[Int] = ArrayBuffer[Int](i)
     def mergeValue(buffer: ArrayBuffer[Int], i: Int): ArrayBuffer[Int] = buffer += i
@@ -188,7 +193,8 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     }
 
     val agg = new Aggregator[Int, Int, ArrayBuffer[Int]](createCombiner, mergeValue, mergeCombiners)
-    val sorter = new ExternalSorter[Int, Int, ArrayBuffer[Int]](Some(agg), None, None, None)
+    val sorter =
+      new ExternalSorter[Int, Int, ArrayBuffer[Int]](context, Some(agg), None, None, None)
     sorter.insertAll(
       (1 to size).iterator.map(i => (i, i)) ++ Iterator((Int.MaxValue, Int.MaxValue)))
     assert(sorter.numSpills > 0, "sorter did not spill")
@@ -204,6 +210,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val conf = createSparkConf(loadDefaults = true, kryo = false)
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local-cluster[1,1,1024]", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     def createCombiner(i: String): ArrayBuffer[String] = ArrayBuffer[String](i)
     def mergeValue(buffer: ArrayBuffer[String], i: String): ArrayBuffer[String] = buffer += i
@@ -214,7 +221,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       createCombiner, mergeValue, mergeCombiners)
 
     val sorter = new ExternalSorter[String, String, ArrayBuffer[String]](
-      Some(agg), None, None, None)
+      context, Some(agg), None, None, None)
 
     sorter.insertAll((1 to size).iterator.map(i => (i.toString, i.toString)) ++ Iterator(
       (null.asInstanceOf[String], "1"),
@@ -271,31 +278,32 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   private def emptyDataStream(conf: SparkConf) {
     conf.set("spark.shuffle.manager", "sort")
     sc = new SparkContext("local", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
     val ord = implicitly[Ordering[Int]]
 
     // Both aggregator and ordering
     val sorter = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(3)), Some(ord), None)
+      context, Some(agg), Some(new HashPartitioner(3)), Some(ord), None)
     assert(sorter.iterator.toSeq === Seq())
     sorter.stop()
 
     // Only aggregator
     val sorter2 = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(3)), None, None)
+      context, Some(agg), Some(new HashPartitioner(3)), None, None)
     assert(sorter2.iterator.toSeq === Seq())
     sorter2.stop()
 
     // Only ordering
     val sorter3 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
+      context, None, Some(new HashPartitioner(3)), Some(ord), None)
     assert(sorter3.iterator.toSeq === Seq())
     sorter3.stop()
 
     // Neither aggregator nor ordering
     val sorter4 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), None, None)
+      context, None, Some(new HashPartitioner(3)), None, None)
     assert(sorter4.iterator.toSeq === Seq())
     sorter4.stop()
   }
@@ -303,6 +311,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
   private def fewElementsPerPartition(conf: SparkConf) {
     conf.set("spark.shuffle.manager", "sort")
     sc = new SparkContext("local", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     val agg = new Aggregator[Int, Int, Int](i => i, (i, j) => i + j, (i, j) => i + j)
     val ord = implicitly[Ordering[Int]]
@@ -313,28 +322,28 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
     // Both aggregator and ordering
     val sorter = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(7)), Some(ord), None)
+      context, Some(agg), Some(new HashPartitioner(7)), Some(ord), None)
     sorter.insertAll(elements.iterator)
     assert(sorter.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
     sorter.stop()
 
     // Only aggregator
     val sorter2 = new ExternalSorter[Int, Int, Int](
-      Some(agg), Some(new HashPartitioner(7)), None, None)
+      context, Some(agg), Some(new HashPartitioner(7)), None, None)
     sorter2.insertAll(elements.iterator)
     assert(sorter2.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
     sorter2.stop()
 
     // Only ordering
     val sorter3 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), Some(ord), None)
+      context, None, Some(new HashPartitioner(7)), Some(ord), None)
     sorter3.insertAll(elements.iterator)
     assert(sorter3.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
     sorter3.stop()
 
     // Neither aggregator nor ordering
     val sorter4 = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), None, None)
+      context, None, Some(new HashPartitioner(7)), None, None)
     sorter4.insertAll(elements.iterator)
     assert(sorter4.partitionedIterator.map(p => (p._1, p._2.toSet)).toSet === expected)
     sorter4.stop()
@@ -345,12 +354,13 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     conf.set("spark.shuffle.manager", "sort")
     conf.set("spark.shuffle.spill.numElementsForceSpillThreshold", (size / 2).toString)
     sc = new SparkContext("local", "test", conf)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
 
     val ord = implicitly[Ordering[Int]]
     val elements = Iterator((1, 1), (5, 5)) ++ (0 until size).iterator.map(x => (2, 2))
 
     val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(7)), Some(ord), None)
+      context, None, Some(new HashPartitioner(7)), Some(ord), None)
     sorter.insertAll(elements)
     assert(sorter.numSpills > 0, "sorter did not spill")
     val iter = sorter.partitionedIterator.map(p => (p._1, p._2.toList))
@@ -432,8 +442,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
     val diskBlockManager = sc.env.blockManager.diskBlockManager
     val ord = implicitly[Ordering[Int]]
     val expectedSize = if (withFailures) size - 1 else size
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
     val sorter = new ExternalSorter[Int, Int, Int](
-      None, Some(new HashPartitioner(3)), Some(ord), None)
+      context, None, Some(new HashPartitioner(3)), Some(ord), None)
     if (withFailures) {
       intercept[SparkException] {
         sorter.insertAll((0 until size).iterator.map { i =>
@@ -501,7 +512,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
         None
       }
     val ord = if (withOrdering) Some(implicitly[Ordering[Int]]) else None
-    val sorter = new ExternalSorter[Int, Int, Int](agg, Some(new HashPartitioner(3)), ord, None)
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
+    val sorter =
+      new ExternalSorter[Int, Int, Int](context, agg, Some(new HashPartitioner(3)), ord, None)
     sorter.insertAll((0 until size).iterator.map { i => (i / 4, i) })
     if (withSpilling) {
       assert(sorter.numSpills > 0, "sorter did not spill")
@@ -538,8 +551,9 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
 
     val testData = Array.tabulate(size) { _ => rand.nextInt().toString }
 
+    val context = MemoryTestingUtils.fakeTaskContext(sc.env)
     val sorter1 = new ExternalSorter[String, String, String](
-      None, None, Some(wrongOrdering), None)
+      context, None, None, Some(wrongOrdering), None)
     val thrown = intercept[IllegalArgumentException] {
       sorter1.insertAll(testData.iterator.map(i => (i, i)))
       assert(sorter1.numSpills > 0, "sorter did not spill")
@@ -561,7 +575,7 @@ class ExternalSorterSuite extends SparkFunSuite with LocalSparkContext {
       createCombiner, mergeValue, mergeCombiners)
 
     val sorter2 = new ExternalSorter[String, String, ArrayBuffer[String]](
-      Some(agg), None, None, None)
+      context, Some(agg), None, None, None)
     sorter2.insertAll(testData.iterator.map(i => (i, i)))
     assert(sorter2.numSpills > 0, "sorter did not spill")
 
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
index 7d94e0566faa..810c74fd2fb9 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
@@ -67,7 +67,6 @@ public UnsafeExternalRowSorter(
     final TaskContext taskContext = TaskContext.get();
     sorter = UnsafeExternalSorter.create(
       taskContext.taskMemoryManager(),
-      sparkEnv.shuffleMemoryManager(),
       sparkEnv.blockManager(),
       taskContext,
       new RowComparator(ordering, schema.length()),
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
index 09511ff35f78..82c645df284d 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
@@ -22,7 +22,6 @@
 import com.google.common.annotations.VisibleForTesting;
 
 import org.apache.spark.SparkEnv;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.sql.catalyst.InternalRow;
 import org.apache.spark.sql.catalyst.expressions.UnsafeProjection;
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
@@ -32,7 +31,7 @@
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.map.BytesToBytesMap;
 import org.apache.spark.unsafe.memory.MemoryLocation;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 
 /**
  * Unsafe-based HashMap for performing aggregations where the aggregated values are fixed-width.
@@ -88,8 +87,6 @@ public static boolean supportsAggregationBufferSchema(StructType schema) {
    * @param aggregationBufferSchema the schema of the aggregation buffer, used for row conversion.
    * @param groupingKeySchema the schema of the grouping key, used for row conversion.
    * @param taskMemoryManager the memory manager used to allocate our Unsafe memory structures.
-   * @param shuffleMemoryManager the shuffle memory manager, for coordinating our memory usage with
-   *                             other tasks.
    * @param initialCapacity the initial capacity of the map (a sizing hint to avoid re-hashing).
    * @param pageSizeBytes the data page size, in bytes; limits the maximum record size.
    * @param enablePerfMetrics if true, performance metrics will be recorded (has minor perf impact)
@@ -99,15 +96,14 @@ public UnsafeFixedWidthAggregationMap(
       StructType aggregationBufferSchema,
       StructType groupingKeySchema,
       TaskMemoryManager taskMemoryManager,
-      ShuffleMemoryManager shuffleMemoryManager,
       int initialCapacity,
       long pageSizeBytes,
       boolean enablePerfMetrics) {
     this.aggregationBufferSchema = aggregationBufferSchema;
     this.groupingKeyProjection = UnsafeProjection.create(groupingKeySchema);
     this.groupingKeySchema = groupingKeySchema;
-    this.map = new BytesToBytesMap(
-      taskMemoryManager, shuffleMemoryManager, initialCapacity, pageSizeBytes, enablePerfMetrics);
+    this.map =
+      new BytesToBytesMap(taskMemoryManager, initialCapacity, pageSizeBytes, enablePerfMetrics);
     this.enablePerfMetrics = enablePerfMetrics;
 
     // Initialize the buffer for aggregation value
@@ -256,7 +252,7 @@ public void printPerfMetrics() {
   public UnsafeKVExternalSorter destructAndCreateExternalSorter() throws IOException {
     UnsafeKVExternalSorter sorter = new UnsafeKVExternalSorter(
       groupingKeySchema, aggregationBufferSchema,
-      SparkEnv.get().blockManager(), map.getShuffleMemoryManager(), map.getPageSizeBytes(), map);
+      SparkEnv.get().blockManager(), map.getPageSizeBytes(), map);
     return sorter;
   }
 }
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index 9df5780e4fd8..46301f004295 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -24,7 +24,6 @@
 import com.google.common.annotations.VisibleForTesting;
 
 import org.apache.spark.TaskContext;
-import org.apache.spark.shuffle.ShuffleMemoryManager;
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
 import org.apache.spark.sql.catalyst.expressions.codegen.BaseOrdering;
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateOrdering;
@@ -34,7 +33,7 @@
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.map.BytesToBytesMap;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.unsafe.memory.TaskMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.collection.unsafe.sort.*;
 
 /**
@@ -50,14 +49,19 @@ public final class UnsafeKVExternalSorter {
   private final UnsafeExternalRowSorter.PrefixComputer prefixComputer;
   private final UnsafeExternalSorter sorter;
 
-  public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
-      BlockManager blockManager, ShuffleMemoryManager shuffleMemoryManager, long pageSizeBytes)
-    throws IOException {
-    this(keySchema, valueSchema, blockManager, shuffleMemoryManager, pageSizeBytes, null);
+  public UnsafeKVExternalSorter(
+      StructType keySchema,
+      StructType valueSchema,
+      BlockManager blockManager,
+      long pageSizeBytes) throws IOException {
+    this(keySchema, valueSchema, blockManager, pageSizeBytes, null);
   }
 
-  public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
-      BlockManager blockManager, ShuffleMemoryManager shuffleMemoryManager, long pageSizeBytes,
+  public UnsafeKVExternalSorter(
+      StructType keySchema,
+      StructType valueSchema,
+      BlockManager blockManager,
+      long pageSizeBytes,
       @Nullable BytesToBytesMap map) throws IOException {
     this.keySchema = keySchema;
     this.valueSchema = valueSchema;
@@ -73,7 +77,6 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
     if (map == null) {
       sorter = UnsafeExternalSorter.create(
         taskMemoryManager,
-        shuffleMemoryManager,
         blockManager,
         taskContext,
         recordComparator,
@@ -115,7 +118,6 @@ public UnsafeKVExternalSorter(StructType keySchema, StructType valueSchema,
 
       sorter = UnsafeExternalSorter.createWithExistingInMemorySorter(
         taskContext.taskMemoryManager(),
-        shuffleMemoryManager,
         blockManager,
         taskContext,
         new KVComparator(ordering, keySchema.length()),
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index 7cd0f7b81e46..fb2fc98e34fb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.execution.aggregate
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.unsafe.KVIterator
-import org.apache.spark.{InternalAccumulator, Logging, SparkEnv, TaskContext}
+import org.apache.spark.{InternalAccumulator, Logging, TaskContext}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeRowJoiner
@@ -34,7 +34,7 @@ import org.apache.spark.sql.types.StructType
  *
  * This iterator first uses hash-based aggregation to process input rows. It uses
  * a hash map to store groups and their corresponding aggregation buffers. If we
- * this map cannot allocate memory from [[org.apache.spark.shuffle.ShuffleMemoryManager]],
+ * this map cannot allocate memory from memory manager,
  * it switches to sort-based aggregation. The process of the switch has the following step:
  *  - Step 1: Sort all entries of the hash map based on values of grouping expressions and
  *            spill them to disk.
@@ -480,10 +480,9 @@ class TungstenAggregationIterator(
     initialAggregationBuffer,
     StructType.fromAttributes(allAggregateFunctions.flatMap(_.aggBufferAttributes)),
     StructType.fromAttributes(groupingExpressions.map(_.toAttribute)),
-    TaskContext.get.taskMemoryManager(),
-    SparkEnv.get.shuffleMemoryManager,
+    TaskContext.get().taskMemoryManager(),
     1024 * 16, // initial capacity
-    SparkEnv.get.shuffleMemoryManager.pageSizeBytes,
+    TaskContext.get().taskMemoryManager().pageSizeBytes,
     false // disable tracking of performance metrics
   )
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/WriterContainer.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/WriterContainer.scala
index cfd64c1d9eb3..1b59b19d9420 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/WriterContainer.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/WriterContainer.scala
@@ -344,8 +344,7 @@ private[sql] class DynamicPartitionWriterContainer(
               StructType.fromAttributes(partitionColumns),
               StructType.fromAttributes(dataColumns),
               SparkEnv.get.blockManager,
-              SparkEnv.get.shuffleMemoryManager,
-              SparkEnv.get.shuffleMemoryManager.pageSizeBytes)
+              TaskContext.get().taskMemoryManager().pageSizeBytes)
             sorter.insertKV(currentKey, getOutputRow(inputRow))
           }
         } else {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
index bc255b27502b..cc8abb1ba463 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
@@ -21,7 +21,7 @@ import java.io.{Externalizable, IOException, ObjectInput, ObjectOutput}
 import java.nio.ByteOrder
 import java.util.{HashMap => JavaHashMap}
 
-import org.apache.spark.shuffle.ShuffleMemoryManager
+import org.apache.spark.memory.{TaskMemoryManager, StaticMemoryManager}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.execution.SparkSqlSerializer
@@ -29,7 +29,7 @@ import org.apache.spark.sql.execution.local.LocalNode
 import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetrics}
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.map.BytesToBytesMap
-import org.apache.spark.unsafe.memory.{MemoryLocation, ExecutorMemoryManager, MemoryAllocator, TaskMemoryManager}
+import org.apache.spark.unsafe.memory.MemoryLocation
 import org.apache.spark.util.Utils
 import org.apache.spark.util.collection.CompactBuffer
 import org.apache.spark.{SparkConf, SparkEnv}
@@ -320,21 +320,20 @@ private[joins] final class UnsafeHashedRelation(
   override def readExternal(in: ObjectInput): Unit = Utils.tryOrIOException {
     val nKeys = in.readInt()
     // This is used in Broadcast, shared by multiple tasks, so we use on-heap memory
-    val taskMemoryManager = new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP))
+    // TODO(josh): This needs to be revisited before we merge this patch; making this change now
+    // so that tests compile:
+    val taskMemoryManager = new TaskMemoryManager(
+      new StaticMemoryManager(
+        new SparkConf().set("spark.unsafe.offHeap", "false"), Long.MaxValue, Long.MaxValue, 1), 0)
 
-    val pageSizeBytes = Option(SparkEnv.get).map(_.shuffleMemoryManager.pageSizeBytes)
+    val pageSizeBytes = Option(SparkEnv.get).map(_.memoryManager.pageSizeBytes)
       .getOrElse(new SparkConf().getSizeAsBytes("spark.buffer.pageSize", "16m"))
 
-    // Dummy shuffle memory manager which always grants all memory allocation requests.
-    // We use this because it doesn't make sense count shared broadcast variables' memory usage
-    // towards individual tasks' quotas. In the future, we should devise a better way of handling
-    // this.
-    val shuffleMemoryManager =
-      ShuffleMemoryManager.create(maxMemory = Long.MaxValue, pageSizeBytes = pageSizeBytes)
+    // TODO(josh): We won't need this dummy memory manager after future refactorings; revisit
+    // during code review
 
     binaryMap = new BytesToBytesMap(
       taskMemoryManager,
-      shuffleMemoryManager,
       (nKeys * 1.5 + 1).toInt, // reduce hash collision
       pageSizeBytes)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index 9385e5734db5..dd92dda48060 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -49,7 +49,8 @@ case class Sort(
   protected override def doExecute(): RDD[InternalRow] = attachTree(this, "sort") {
     child.execute().mapPartitions( { iterator =>
       val ordering = newOrdering(sortOrder, child.output)
-      val sorter = new ExternalSorter[InternalRow, Null, InternalRow](ordering = Some(ordering))
+      val sorter = new ExternalSorter[InternalRow, Null, InternalRow](
+        TaskContext.get(), ordering = Some(ordering))
       sorter.insertAll(iterator.map(r => (r.copy(), null)))
       val baseIterator = sorter.iterator.map(_._1)
       val context = TaskContext.get()
@@ -124,7 +125,7 @@ case class TungstenSort(
         }
       }
 
-      val pageSize = SparkEnv.get.shuffleMemoryManager.pageSizeBytes
+      val pageSize = SparkEnv.get.memoryManager.pageSizeBytes
       val sorter = new UnsafeExternalRowSorter(
         schema, ordering, prefixComparator, prefixComputer, pageSize)
       if (testSpillFrequency > 0) {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
index 1739798a24e0..dbf4863b767b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
@@ -23,13 +23,12 @@ import scala.util.{Try, Random}
 
 import org.scalatest.Matchers
 
-import org.apache.spark.{TaskContextImpl, TaskContext, SparkFunSuite}
-import org.apache.spark.shuffle.ShuffleMemoryManager
+import org.apache.spark.{SparkConf, TaskContextImpl, TaskContext, SparkFunSuite}
+import org.apache.spark.memory.{TaskMemoryManager, GrantEverythingMemoryManager}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
-import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator, TaskMemoryManager}
 import org.apache.spark.unsafe.types.UTF8String
 
 /**
@@ -49,23 +48,22 @@ class UnsafeFixedWidthAggregationMapSuite
   private def emptyAggregationBuffer: InternalRow = InternalRow(0)
   private val PAGE_SIZE_BYTES: Long = 1L << 26; // 64 megabytes
 
+  private var memoryManager: GrantEverythingMemoryManager = null
   private var taskMemoryManager: TaskMemoryManager = null
-  private var shuffleMemoryManager: TestShuffleMemoryManager = null
 
   def testWithMemoryLeakDetection(name: String)(f: => Unit) {
     def cleanup(): Unit = {
       if (taskMemoryManager != null) {
-        val leakedShuffleMemory = shuffleMemoryManager.getMemoryConsumptionForThisTask()
         assert(taskMemoryManager.cleanUpAllAllocatedMemory() === 0)
-        assert(leakedShuffleMemory === 0)
         taskMemoryManager = null
       }
       TaskContext.unset()
     }
 
     test(name) {
-      taskMemoryManager = new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP))
-      shuffleMemoryManager = new TestShuffleMemoryManager
+      val conf = new SparkConf().set("spark.unsafe.offHeap", "false")
+      memoryManager = new GrantEverythingMemoryManager(conf)
+      taskMemoryManager = new TaskMemoryManager(memoryManager, 0)
 
       TaskContext.setTaskContext(new TaskContextImpl(
         stageId = 0,
@@ -110,7 +108,6 @@ class UnsafeFixedWidthAggregationMapSuite
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      shuffleMemoryManager,
       1024, // initial capacity,
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -125,7 +122,6 @@ class UnsafeFixedWidthAggregationMapSuite
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      shuffleMemoryManager,
       1024, // initial capacity
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -153,7 +149,6 @@ class UnsafeFixedWidthAggregationMapSuite
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      shuffleMemoryManager,
       128, // initial capacity
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -176,14 +171,13 @@ class UnsafeFixedWidthAggregationMapSuite
 
   testWithMemoryLeakDetection("test external sorting") {
     // Memory consumption in the beginning of the task.
-    val initialMemoryConsumption = shuffleMemoryManager.getMemoryConsumptionForThisTask()
+    val initialMemoryConsumption = taskMemoryManager.getMemoryConsumptionForThisTask()
 
     val map = new UnsafeFixedWidthAggregationMap(
       emptyAggregationBuffer,
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      shuffleMemoryManager,
       128, // initial capacity
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -200,7 +194,7 @@ class UnsafeFixedWidthAggregationMapSuite
     val sorter = map.destructAndCreateExternalSorter()
 
     withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
+      assert(taskMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
     }
 
     // Add more keys to the sorter and make sure the results come out sorted.
@@ -214,7 +208,7 @@ class UnsafeFixedWidthAggregationMapSuite
       sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
 
       if ((i % 100) == 0) {
-        shuffleMemoryManager.markAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemory()
         sorter.closeCurrentPage()
       }
     }
@@ -238,7 +232,6 @@ class UnsafeFixedWidthAggregationMapSuite
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      shuffleMemoryManager,
       128, // initial capacity
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -258,7 +251,7 @@ class UnsafeFixedWidthAggregationMapSuite
       sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
 
       if ((i % 100) == 0) {
-        shuffleMemoryManager.markAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemory()
         sorter.closeCurrentPage()
       }
     }
@@ -281,14 +274,13 @@ class UnsafeFixedWidthAggregationMapSuite
   testWithMemoryLeakDetection("test external sorting with empty records") {
 
     // Memory consumption in the beginning of the task.
-    val initialMemoryConsumption = shuffleMemoryManager.getMemoryConsumptionForThisTask()
+    val initialMemoryConsumption = taskMemoryManager.getMemoryConsumptionForThisTask()
 
     val map = new UnsafeFixedWidthAggregationMap(
       emptyAggregationBuffer,
       StructType(Nil),
       StructType(Nil),
       taskMemoryManager,
-      shuffleMemoryManager,
       128, // initial capacity
       PAGE_SIZE_BYTES,
       false // disable perf metrics
@@ -303,7 +295,7 @@ class UnsafeFixedWidthAggregationMapSuite
     val sorter = map.destructAndCreateExternalSorter()
 
     withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      assert(shuffleMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
+      assert(taskMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
     }
 
     // Add more keys to the sorter and make sure the results come out sorted.
@@ -311,7 +303,7 @@ class UnsafeFixedWidthAggregationMapSuite
       sorter.insertKV(UnsafeRow.createFromByteArray(0, 0), UnsafeRow.createFromByteArray(0, 0))
 
       if ((i % 100) == 0) {
-        shuffleMemoryManager.markAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemory()
         sorter.closeCurrentPage()
       }
     }
@@ -332,34 +324,28 @@ class UnsafeFixedWidthAggregationMapSuite
   }
 
   testWithMemoryLeakDetection("convert to external sorter under memory pressure (SPARK-10474)") {
-    val smm = ShuffleMemoryManager.createForTesting(65536)
     val pageSize = 4096
     val map = new UnsafeFixedWidthAggregationMap(
       emptyAggregationBuffer,
       aggBufferSchema,
       groupKeySchema,
       taskMemoryManager,
-      smm,
       128, // initial capacity
       pageSize,
       false // disable perf metrics
     )
 
-    // Insert into the map until we've run out of space
     val rand = new Random(42)
-    var hasSpace = true
-    while (hasSpace) {
+    for (i <- 1 to 100) {
       val str = rand.nextString(1024)
       val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
-      if (buf == null) {
-        hasSpace = false
-      } else {
-        buf.setInt(0, str.length)
-      }
+      buf.setInt(0, str.length)
     }
-
-    // Ensure we're actually maxed out by asserting that we can't acquire even just 1 byte
-    assert(smm.tryToAcquire(1) === 0)
+    // Simulate running out of space
+    memoryManager.markExecutionAsOutOfMemory()
+    val str = rand.nextString(1024)
+    val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
+    assert(buf == null)
 
     // Convert the map into a sorter. This used to fail before the fix for SPARK-10474
     // because we would try to acquire space for the in-memory sorter pointer array before
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
index d3be568a8758..13dc1754c9ff 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
@@ -20,12 +20,12 @@ package org.apache.spark.sql.execution
 import scala.util.Random
 
 import org.apache.spark._
+import org.apache.spark.memory.{TaskMemoryManager, GrantEverythingMemoryManager}
 import org.apache.spark.sql.{RandomDataGenerator, Row}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.{InterpretedOrdering, UnsafeRow, UnsafeProjection}
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
-import org.apache.spark.unsafe.memory.{ExecutorMemoryManager, MemoryAllocator, TaskMemoryManager}
 
 /**
  * Test suite for [[UnsafeKVExternalSorter]], with randomly generated test data.
@@ -108,9 +108,9 @@ class UnsafeKVExternalSorterSuite extends SparkFunSuite with SharedSQLContext {
       inputData: Seq[(InternalRow, InternalRow)],
       pageSize: Long,
       spill: Boolean): Unit = {
-
-    val taskMemMgr = new TaskMemoryManager(new ExecutorMemoryManager(MemoryAllocator.HEAP))
-    val shuffleMemMgr = new TestShuffleMemoryManager
+    val memoryManager =
+      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"))
+    val taskMemMgr = new TaskMemoryManager(memoryManager, 0)
     TaskContext.setTaskContext(new TaskContextImpl(
       stageId = 0,
       partitionId = 0,
@@ -121,14 +121,14 @@ class UnsafeKVExternalSorterSuite extends SparkFunSuite with SharedSQLContext {
       internalAccumulators = Seq.empty))
 
     val sorter = new UnsafeKVExternalSorter(
-      keySchema, valueSchema, SparkEnv.get.blockManager, shuffleMemMgr, pageSize)
+      keySchema, valueSchema, SparkEnv.get.blockManager, pageSize)
 
     // Insert the keys and values into the sorter
     inputData.foreach { case (k, v) =>
       sorter.insertKV(k.asInstanceOf[UnsafeRow], v.asInstanceOf[UnsafeRow])
       // 1% chance we will spill
       if (rand.nextDouble() < 0.01 && spill) {
-        shuffleMemMgr.markAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemory()
         sorter.closeCurrentPage()
       }
     }
@@ -170,12 +170,7 @@ class UnsafeKVExternalSorterSuite extends SparkFunSuite with SharedSQLContext {
     assert(out.sorted(kvOrdering) === inputData.sorted(kvOrdering))
 
     // Make sure there is no memory leak
-    val leakedUnsafeMemory: Long = taskMemMgr.cleanUpAllAllocatedMemory
-    if (shuffleMemMgr != null) {
-      val leakedShuffleMemory: Long = shuffleMemMgr.getMemoryConsumptionForThisTask()
-      assert(0L === leakedShuffleMemory)
-    }
-    assert(0 === leakedUnsafeMemory)
+    assert(0 === taskMemMgr.cleanUpAllAllocatedMemory)
     TaskContext.unset()
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
index 1680d7e0a85c..d32572b54b8a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.execution
 import java.io.{File, ByteArrayInputStream, ByteArrayOutputStream}
 
 import org.apache.spark.executor.ShuffleWriteMetrics
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.ShuffleBlockId
 import org.apache.spark.util.collection.ExternalSorter
@@ -112,7 +113,12 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
       val data = (1 to 10000).iterator.map { i =>
         (i, converter(Row(i)))
       }
+      val taskMemoryManager = new TaskMemoryManager(sc.env.memoryManager, 0)
+      val taskContext = new TaskContextImpl(
+        0, 0, 0, 0, taskMemoryManager, null, InternalAccumulator.create(sc))
+
       val sorter = new ExternalSorter[Int, UnsafeRow, UnsafeRow](
+        taskContext,
         partitioner = Some(new HashPartitioner(10)),
         serializer = Some(new UnsafeRowSerializer(numFields = 1)))
 
@@ -122,10 +128,8 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
       assert(sorter.numSpills > 0)
 
       // Merging spilled files should not throw assertion error
-      val taskContext =
-        new TaskContextImpl(0, 0, 0, 0, null, null, InternalAccumulator.create(sc))
       taskContext.taskMetrics.shuffleWriteMetrics = Some(new ShuffleWriteMetrics)
-      sorter.writePartitionedFile(ShuffleBlockId(0, 0, 0), taskContext, outputFile)
+      sorter.writePartitionedFile(ShuffleBlockId(0, 0, 0), outputFile)
     } {
       // Clean up
       if (sc != null) {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
index cc0ac1b07c21..475037bd4537 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
@@ -18,16 +18,16 @@
 package org.apache.spark.sql.execution.aggregate
 
 import org.apache.spark._
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.InterpretedMutableProjection
 import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.sql.test.SharedSQLContext
-import org.apache.spark.unsafe.memory.TaskMemoryManager
 
 class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLContext {
 
   test("memory acquired on construction") {
-    val taskMemoryManager = new TaskMemoryManager(SparkEnv.get.executorMemoryManager)
+    val taskMemoryManager = new TaskMemoryManager(SparkEnv.get.memoryManager, 0)
     val taskContext = new TaskContextImpl(0, 0, 0, 0, taskMemoryManager, null, Seq.empty)
     TaskContext.setTaskContext(taskContext)
 
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
index b2b684871963..c17fb7238151 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockHandlerSuite.scala
@@ -254,7 +254,7 @@ class ReceivedBlockHandlerSuite
       maxMem: Long,
       conf: SparkConf,
       name: String = SparkContext.DRIVER_IDENTIFIER): BlockManager = {
-    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem)
+    val memManager = new StaticMemoryManager(conf, Long.MaxValue, maxMem, numCores = 1)
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
     val blockManager = new BlockManager(name, rpcEnv, blockManagerMaster, serializer, conf,
       memManager, mapOutputTracker, shuffleManager, transfer, securityMgr, 0)
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/ExecutorMemoryManager.java b/unsafe/src/main/java/org/apache/spark/unsafe/memory/ExecutorMemoryManager.java
deleted file mode 100644
index cbbe8594627a..000000000000
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/ExecutorMemoryManager.java
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.unsafe.memory;
-
-import java.lang.ref.WeakReference;
-import java.util.HashMap;
-import java.util.LinkedList;
-import java.util.Map;
-import javax.annotation.concurrent.GuardedBy;
-
-/**
- * Manages memory for an executor. Individual operators / tasks allocate memory through
- * {@link TaskMemoryManager} objects, which obtain their memory from ExecutorMemoryManager.
- */
-public class ExecutorMemoryManager {
-
-  /**
-   * Allocator, exposed for enabling untracked allocations of temporary data structures.
-   */
-  public final MemoryAllocator allocator;
-
-  /**
-   * Tracks whether memory will be allocated on the JVM heap or off-heap using sun.misc.Unsafe.
-   */
-  final boolean inHeap;
-
-  @GuardedBy("this")
-  private final Map<Long, LinkedList<WeakReference<MemoryBlock>>> bufferPoolsBySize =
-    new HashMap<Long, LinkedList<WeakReference<MemoryBlock>>>();
-
-  private static final int POOLING_THRESHOLD_BYTES = 1024 * 1024;
-
-  /**
-   * Construct a new ExecutorMemoryManager.
-   *
-   * @param allocator the allocator that will be used
-   */
-  public ExecutorMemoryManager(MemoryAllocator allocator) {
-    this.inHeap = allocator instanceof HeapMemoryAllocator;
-    this.allocator = allocator;
-  }
-
-  /**
-   * Returns true if allocations of the given size should go through the pooling mechanism and
-   * false otherwise.
-   */
-  private boolean shouldPool(long size) {
-    // Very small allocations are less likely to benefit from pooling.
-    // At some point, we should explore supporting pooling for off-heap memory, but for now we'll
-    // ignore that case in the interest of simplicity.
-    return size >= POOLING_THRESHOLD_BYTES && allocator instanceof HeapMemoryAllocator;
-  }
-
-  /**
-   * Allocates a contiguous block of memory. Note that the allocated memory is not guaranteed
-   * to be zeroed out (call `zero()` on the result if this is necessary).
-   */
-  MemoryBlock allocate(long size) throws OutOfMemoryError {
-    if (shouldPool(size)) {
-      synchronized (this) {
-        final LinkedList<WeakReference<MemoryBlock>> pool = bufferPoolsBySize.get(size);
-        if (pool != null) {
-          while (!pool.isEmpty()) {
-            final WeakReference<MemoryBlock> blockReference = pool.pop();
-            final MemoryBlock memory = blockReference.get();
-            if (memory != null) {
-              assert (memory.size() == size);
-              return memory;
-            }
-          }
-          bufferPoolsBySize.remove(size);
-        }
-      }
-      return allocator.allocate(size);
-    } else {
-      return allocator.allocate(size);
-    }
-  }
-
-  void free(MemoryBlock memory) {
-    final long size = memory.size();
-    if (shouldPool(size)) {
-      synchronized (this) {
-        LinkedList<WeakReference<MemoryBlock>> pool = bufferPoolsBySize.get(size);
-        if (pool == null) {
-          pool = new LinkedList<WeakReference<MemoryBlock>>();
-          bufferPoolsBySize.put(size, pool);
-        }
-        pool.add(new WeakReference<MemoryBlock>(memory));
-      }
-    } else {
-      allocator.free(memory);
-    }
-  }
-
-}
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java b/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
index 6722301df19d..ebe90d9e63d8 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
@@ -17,22 +17,71 @@
 
 package org.apache.spark.unsafe.memory;
 
+import javax.annotation.concurrent.GuardedBy;
+import java.lang.ref.WeakReference;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.Map;
+
 /**
  * A simple {@link MemoryAllocator} that can allocate up to 16GB using a JVM long primitive array.
  */
 public class HeapMemoryAllocator implements MemoryAllocator {
 
+  @GuardedBy("this")
+  private final Map<Long, LinkedList<WeakReference<MemoryBlock>>> bufferPoolsBySize =
+    new HashMap<>();
+
+  private static final int POOLING_THRESHOLD_BYTES = 1024 * 1024;
+
+  /**
+   * Returns true if allocations of the given size should go through the pooling mechanism and
+   * false otherwise.
+   */
+  private boolean shouldPool(long size) {
+    // Very small allocations are less likely to benefit from pooling.
+    return size >= POOLING_THRESHOLD_BYTES;
+  }
+
   @Override
   public MemoryBlock allocate(long size) throws OutOfMemoryError {
     if (size % 8 != 0) {
       throw new IllegalArgumentException("Size " + size + " was not a multiple of 8");
     }
+    if (shouldPool(size)) {
+      synchronized (this) {
+        final LinkedList<WeakReference<MemoryBlock>> pool = bufferPoolsBySize.get(size);
+        if (pool != null) {
+          while (!pool.isEmpty()) {
+            final WeakReference<MemoryBlock> blockReference = pool.pop();
+            final MemoryBlock memory = blockReference.get();
+            if (memory != null) {
+              assert (memory.size() == size);
+              return memory;
+            }
+          }
+          bufferPoolsBySize.remove(size);
+        }
+      }
+    }
     long[] array = new long[(int) (size / 8)];
     return MemoryBlock.fromLongArray(array);
   }
 
   @Override
   public void free(MemoryBlock memory) {
-    // Do nothing
+    final long size = memory.size();
+    if (shouldPool(size)) {
+      synchronized (this) {
+        LinkedList<WeakReference<MemoryBlock>> pool = bufferPoolsBySize.get(size);
+        if (pool == null) {
+          pool = new LinkedList<>();
+          bufferPoolsBySize.put(size, pool);
+        }
+        pool.add(new WeakReference<>(memory));
+      }
+    } else {
+      // Do nothing
+    }
   }
 }
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/MemoryBlock.java b/unsafe/src/main/java/org/apache/spark/unsafe/memory/MemoryBlock.java
index dd7582083437..e3e79471154d 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/MemoryBlock.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/memory/MemoryBlock.java
@@ -30,9 +30,10 @@ public class MemoryBlock extends MemoryLocation {
 
   /**
    * Optional page number; used when this MemoryBlock represents a page allocated by a
-   * MemoryManager. This is package-private and is modified by MemoryManager.
+   * TaskMemoryManager. This field is public so that it can be modified by the TaskMemoryManager,
+   * which lives in a different package.
    */
-  int pageNumber = -1;
+  public int pageNumber = -1;
 
   public MemoryBlock(@Nullable Object obj, long offset, long length) {
     super(obj, offset);

From 87f82a5fb9c4350a97c761411069245f07aad46f Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Sun, 25 Oct 2015 21:57:34 -0700
Subject: [PATCH 359/896] [SPARK-11127][STREAMING] upgrade AWS SDK and Kinesis
 Client Library (KCL)

AWS SDK 1.9.40 is the latest 1.9.x release. KCL 1.5.1 is the latest release that using AWS SDK 1.9.x. The main goal is to have Kinesis consumer be able to read messages generated from Kinesis Producer Library (KPL). The API should be compatible with old versions.

tdas brkyvz

Author: Xiangrui Meng <meng@databricks.com>

Closes #9153 from mengxr/SPARK-11127.
---
 pom.xml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pom.xml b/pom.xml
index 445e65c0459b..3dfc434fb553 100644
--- a/pom.xml
+++ b/pom.xml
@@ -152,8 +152,8 @@
     <avro.version>1.7.7</avro.version>
     <avro.mapred.classifier>hadoop2</avro.mapred.classifier>
     <jets3t.version>0.7.1</jets3t.version>
-    <aws.java.sdk.version>1.9.16</aws.java.sdk.version>
-    <aws.kinesis.client.version>1.3.0</aws.kinesis.client.version>
+    <aws.java.sdk.version>1.9.40</aws.java.sdk.version>
+    <aws.kinesis.client.version>1.4.0</aws.kinesis.client.version>
     <!--  org.apache.httpcomponents/httpclient-->
     <commons.httpclient.version>4.3.2</commons.httpclient.version>
     <!--  commons-httpclient/commons-httpclient-->

From 07ced43424447699e47106de9ca2fa714756bdeb Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Sun, 25 Oct 2015 22:47:39 -0700
Subject: [PATCH 360/896] [SPARK-11253] [SQL] reset all accumulators in
 physical operators before execute an action

With this change, our query execution listener can get the metrics correctly.

The UI still looks good after this change.
<img width="257" alt="screen shot 2015-10-23 at 11 25 14 am" src="https://cloud.githubusercontent.com/assets/3182036/10683834/d516f37e-7978-11e5-8118-343ed40eb824.png">
<img width="494" alt="screen shot 2015-10-23 at 11 25 01 am" src="https://cloud.githubusercontent.com/assets/3182036/10683837/e1fa60da-7978-11e5-8ec8-178b88f27764.png">

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9215 from cloud-fan/metric.
---
 .../org/apache/spark/sql/DataFrame.scala      |  3 +
 .../sql/execution/metric/SQLMetrics.scala     |  7 +-
 .../sql/util/DataFrameCallbackSuite.scala     | 81 ++++++++++++++++++-
 3 files changed, 87 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index bf25bcde208e..25ad3bb993f4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1974,6 +1974,9 @@ class DataFrame private[sql](
    */
   private def withCallback[T](name: String, df: DataFrame)(action: DataFrame => T) = {
     try {
+      df.queryExecution.executedPlan.foreach { plan =>
+        plan.metrics.valuesIterator.foreach(_.reset())
+      }
       val start = System.nanoTime()
       val result = action(df)
       val end = System.nanoTime()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
index 075b7ad88111..1c253e3942e9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/metric/SQLMetrics.scala
@@ -28,7 +28,12 @@ import org.apache.spark.{Accumulable, AccumulableParam, SparkContext}
  */
 private[sql] abstract class SQLMetric[R <: SQLMetricValue[T], T](
     name: String, val param: SQLMetricParam[R, T])
-  extends Accumulable[R, T](param.zero, param, Some(name), true)
+  extends Accumulable[R, T](param.zero, param, Some(name), true) {
+
+  def reset(): Unit = {
+    this.value = param.zero
+  }
+}
 
 /**
  * Create a layer for specialized metric. We cannot add `@specialized` to
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
index eb056cd51971..b46b0d2f6040 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/util/DataFrameCallbackSuite.scala
@@ -17,14 +17,14 @@
 
 package org.apache.spark.sql.util
 
-import org.apache.spark.SparkException
+import scala.collection.mutable.ArrayBuffer
+
+import org.apache.spark._
 import org.apache.spark.sql.{functions, QueryTest}
 import org.apache.spark.sql.catalyst.plans.logical.{Aggregate, Project}
 import org.apache.spark.sql.execution.QueryExecution
 import org.apache.spark.sql.test.SharedSQLContext
 
-import scala.collection.mutable.ArrayBuffer
-
 class DataFrameCallbackSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
   import functions._
@@ -54,6 +54,8 @@ class DataFrameCallbackSuite extends QueryTest with SharedSQLContext {
     assert(metrics(1)._1 == "count")
     assert(metrics(1)._2.analyzed.isInstanceOf[Aggregate])
     assert(metrics(1)._3 > 0)
+
+    sqlContext.listenerManager.unregister(listener)
   }
 
   test("execute callback functions when a DataFrame action failed") {
@@ -79,5 +81,78 @@ class DataFrameCallbackSuite extends QueryTest with SharedSQLContext {
     assert(metrics(0)._1 == "collect")
     assert(metrics(0)._2.analyzed.isInstanceOf[Project])
     assert(metrics(0)._3.getMessage == e.getMessage)
+
+    sqlContext.listenerManager.unregister(listener)
+  }
+
+  test("get numRows metrics by callback") {
+    val metrics = ArrayBuffer.empty[Long]
+    val listener = new QueryExecutionListener {
+      // Only test successful case here, so no need to implement `onFailure`
+      override def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit = {}
+
+      override def onSuccess(funcName: String, qe: QueryExecution, duration: Long): Unit = {
+        metrics += qe.executedPlan.longMetric("numInputRows").value.value
+      }
+    }
+    sqlContext.listenerManager.register(listener)
+
+    val df = Seq(1 -> "a").toDF("i", "j").groupBy("i").count()
+    df.collect()
+    df.collect()
+    Seq(1 -> "a", 2 -> "a").toDF("i", "j").groupBy("i").count().collect()
+
+    assert(metrics.length == 3)
+    assert(metrics(0) == 1)
+    assert(metrics(1) == 1)
+    assert(metrics(2) == 2)
+
+    sqlContext.listenerManager.unregister(listener)
+  }
+
+  // TODO: Currently some LongSQLMetric use -1 as initial value, so if the accumulator is never
+  // updated, we can filter it out later.  However, when we aggregate(sum) accumulator values at
+  // driver side for SQL physical operators, these -1 values will make our result smaller.
+  // A easy fix is to create a new SQLMetric(including new MetricValue, MetricParam, etc.), but we
+  // can do it later because the impact is just too small (1048576 tasks for 1 MB).
+  ignore("get size metrics by callback") {
+    val metrics = ArrayBuffer.empty[Long]
+    val listener = new QueryExecutionListener {
+      // Only test successful case here, so no need to implement `onFailure`
+      override def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit = {}
+
+      override def onSuccess(funcName: String, qe: QueryExecution, duration: Long): Unit = {
+        metrics += qe.executedPlan.longMetric("dataSize").value.value
+        val bottomAgg = qe.executedPlan.children(0).children(0)
+        metrics += bottomAgg.longMetric("dataSize").value.value
+      }
+    }
+    sqlContext.listenerManager.register(listener)
+
+    val sparkListener = new SaveInfoListener
+    sqlContext.sparkContext.addSparkListener(sparkListener)
+
+    val df = (1 to 100).map(i => i -> i.toString).toDF("i", "j")
+    df.groupBy("i").count().collect()
+
+    def getPeakExecutionMemory(stageId: Int): Long = {
+      val peakMemoryAccumulator = sparkListener.getCompletedStageInfos(stageId).accumulables
+        .filter(_._2.name == InternalAccumulator.PEAK_EXECUTION_MEMORY)
+
+      assert(peakMemoryAccumulator.size == 1)
+      peakMemoryAccumulator.head._2.value.toLong
+    }
+
+    assert(sparkListener.getCompletedStageInfos.length == 2)
+    val bottomAggDataSize = getPeakExecutionMemory(0)
+    val topAggDataSize = getPeakExecutionMemory(1)
+
+    // For this simple case, the peakExecutionMemory of a stage should be the data size of the
+    // aggregate operator, as we only have one memory consuming operator per stage.
+    assert(metrics.length == 2)
+    assert(metrics(0) == topAggDataSize)
+    assert(metrics(1) == bottomAggDataSize)
+
+    sqlContext.listenerManager.unregister(listener)
   }
 }

From 05c4bdb57947f44924b4fbdd8e4e2101f2f816f5 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Mon, 26 Oct 2015 09:25:19 +0100
Subject: [PATCH 361/896] [SPARK-11279][PYSPARK] Add DataFrame#toDF in PySpark

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9248 from zjffdu/SPARK-11279.
---
 python/pyspark/sql/dataframe.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 36fc6e0611dc..3baff8147753 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -1266,6 +1266,18 @@ def drop(self, col):
             raise TypeError("col should be a string or a Column")
         return DataFrame(jdf, self.sql_ctx)
 
+    @ignore_unicode_prefix
+    def toDF(self, *cols):
+        """Returns a new class:`DataFrame` that with new specified column names
+
+        :param cols: list of new column names (string)
+
+        >>> df.toDF('f1', 'f2').collect()
+        [Row(f1=2, f2=u'Alice'), Row(f1=5, f2=u'Bob')]
+        """
+        jdf = self._jdf.toDF(self._jseq(cols))
+        return DataFrame(jdf, self.sql_ctx)
+
     @since(1.3)
     def toPandas(self):
         """Returns the contents of this :class:`DataFrame` as Pandas ``pandas.DataFrame``.

From 616be29c7f2ebc184bd5ec97210da36a2174d80c Mon Sep 17 00:00:00 2001
From: Kevin Yu <qyu@us.ibm.com>
Date: Mon, 26 Oct 2015 09:34:15 +0000
Subject: [PATCH 362/896] [SPARK-5966][WIP] Spark-submit deploy-mode cluster is
 not compatible with master local>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

… master local>

Author: Kevin Yu <qyu@us.ibm.com>

Closes #9220 from kevinyu98/working_on_spark-5966.
---
 core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index 640cc325281a..84ae122f4437 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -328,6 +328,8 @@ object SparkSubmit {
       case (STANDALONE, CLUSTER) if args.isR =>
         printErrorAndExit("Cluster deploy mode is currently not supported for R " +
           "applications on standalone clusters.")
+      case (LOCAL, CLUSTER) =>
+        printErrorAndExit("Cluster deploy mode is not compatible with master \"local\"")
       case (_, CLUSTER) if isShell(args.primaryResource) =>
         printErrorAndExit("Cluster deploy mode is not applicable to Spark shells.")
       case (_, CLUSTER) if isSqlShell(args.mainClass) =>

From 3689beb98b6a6db61e35049fdb57b0cd6aad8019 Mon Sep 17 00:00:00 2001
From: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>
Date: Mon, 26 Oct 2015 15:12:25 -0700
Subject: [PATCH 363/896] [SPARK-10979][SPARKR] Sparkrmerge: Add merge to
 DataFrame with R signature

Add merge function to DataFrame, which supports R signature.
https://stat.ethz.ch/R-manual/R-devel/library/base/html/merge.html

Author: Narine Kokhlikyan <narine.kokhlikyan@gmail.com>

Closes #9012 from NarineK/sparkrmerge.
---
 R/pkg/R/DataFrame.R              | 140 ++++++++++++++++++++++++++++++-
 R/pkg/inst/tests/test_sparkSQL.R |  37 +++++++-
 2 files changed, 169 insertions(+), 8 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 2acbd081cd50..c8944459542a 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1457,15 +1457,147 @@ setMethod("join",
             dataFrame(sdf)
           })
 
-#' @rdname merge
+#'
 #' @name merge
 #' @aliases join
+#' @title Merges two data frames
+#' @param x the first data frame to be joined
+#' @param y the second data frame to be joined
+#' @param by a character vector specifying the join columns. If by is not
+#'   specified, the common column names in \code{x} and \code{y} will be used.
+#' @param by.x a character vector specifying the joining columns for x.
+#' @param by.y a character vector specifying the joining columns for y.
+#' @param all.x a boolean value indicating whether all the rows in x should
+#'              be including in the join
+#' @param all.y a boolean value indicating whether all the rows in y should
+#'              be including in the join
+#' @param sort a logical argument indicating whether the resulting columns should be sorted
+#' @details  If all.x and all.y are set to FALSE, a natural join will be returned. If
+#'   all.x is set to TRUE and all.y is set to FALSE, a left outer join will
+#'   be returned. If all.x is set to FALSE and all.y is set to TRUE, a right
+#'   outer join will be returned. If all.x and all.y are set to TRUE, a full
+#'   outer join will be returned.
+#' @rdname merge
+#' @export
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' df1 <- jsonFile(sqlContext, path)
+#' df2 <- jsonFile(sqlContext, path2)
+#' merge(df1, df2) # Performs a Cartesian
+#' merge(df1, df2, by = "col1") # Performs an inner join based on expression
+#' merge(df1, df2, by.x = "col1", by.y = "col2", all.y = TRUE)
+#' merge(df1, df2, by.x = "col1", by.y = "col2", all.x = TRUE)
+#' merge(df1, df2, by.x = "col1", by.y = "col2", all.x = TRUE, all.y = TRUE)
+#' merge(df1, df2, by.x = "col1", by.y = "col2", all = TRUE, sort = FALSE)
+#' merge(df1, df2, by = "col1", all = TRUE, suffixes = c("-X", "-Y"))
+#' }
 setMethod("merge",
           signature(x = "DataFrame", y = "DataFrame"),
-          function(x, y, joinExpr = NULL, joinType = NULL, ...) {
-            join(x, y, joinExpr, joinType)
-          })
+          function(x, y, by = intersect(names(x), names(y)), by.x = by, by.y = by,
+                   all = FALSE, all.x = all, all.y = all,
+                   sort = TRUE, suffixes = c("_x","_y"), ... ) {
+
+            if (length(suffixes) != 2) {
+              stop("suffixes must have length 2")
+            }
+
+            # join type is identified based on the values of all, all.x and all.y
+            # default join type is inner, according to R it should be natural but since it
+            # is not supported in spark inner join is used
+            joinType <- "inner"
+            if (all || (all.x && all.y)) {
+              joinType <- "outer"
+            } else if (all.x) {
+              joinType <- "left_outer"
+            } else if (all.y) {
+              joinType <- "right_outer"
+            }
 
+            # join expression is based on by.x, by.y if both by.x and by.y are not missing
+            # or on by, if by.x or by.y are missing or have different lengths
+            if (length(by.x) > 0 && length(by.x) == length(by.y)) {
+              joinX <- by.x
+              joinY <- by.y
+            } else if (length(by) > 0) {
+              # if join columns have the same name for both dataframes,
+              # they are used in join expression
+              joinX <- by
+              joinY <- by
+            } else {
+              # if by or both by.x and by.y have length 0, use Cartesian Product
+              joinRes <- join(x, y)
+              return (joinRes)
+            }
+
+            # sets alias for making colnames unique in dataframes 'x' and 'y'
+            colsX <- generateAliasesForIntersectedCols(x, by, suffixes[1])
+            colsY <- generateAliasesForIntersectedCols(y, by, suffixes[2])
+
+            # selects columns with their aliases from dataframes
+            # in case same column names are present in both data frames
+            xsel <- select(x, colsX)
+            ysel <- select(y, colsY)
+
+            # generates join conditions and adds them into a list
+            # it also considers alias names of the columns while generating join conditions
+            joinColumns <- lapply(seq_len(length(joinX)), function(i) {
+              colX <- joinX[[i]]
+              colY <- joinY[[i]]
+
+              if (colX %in% by) {
+                colX <- paste(colX, suffixes[1], sep = "")
+              }
+              if (colY %in% by) {
+                colY <- paste(colY, suffixes[2], sep = "")
+              }
+
+              colX <- getColumn(xsel, colX)
+              colY <- getColumn(ysel, colY)
+
+              colX == colY
+            })
+
+            # concatenates join columns with '&' and executes join
+            joinExpr <- Reduce("&", joinColumns)
+            joinRes <- join(xsel, ysel, joinExpr, joinType)
+
+            # sorts the result by 'by' columns if sort = TRUE
+            if (sort && length(by) > 0) {
+              colNameWithSuffix <- paste(by, suffixes[2], sep = "")
+              joinRes <- do.call("arrange", c(joinRes, colNameWithSuffix, decreasing = FALSE))
+            }
+
+            joinRes
+          })
+
+#' 
+#' Creates a list of columns by replacing the intersected ones with aliases.
+#' The name of the alias column is formed by concatanating the original column name and a suffix.
+#'
+#' @param x a DataFrame on which the
+#' @param intersectedColNames a list of intersected column names
+#' @param suffix a suffix for the column name
+#' @return list of columns
+#'
+generateAliasesForIntersectedCols <- function (x, intersectedColNames, suffix) {
+  allColNames <- names(x)
+  # sets alias for making colnames unique in dataframe 'x'
+  cols <- lapply(allColNames, function(colName) {
+    col <- getColumn(x, colName)
+    if (colName %in% intersectedColNames) {
+      newJoin <- paste(colName, suffix, sep = "")
+      if (newJoin %in% allColNames){
+        stop ("The following column name: ", newJoin, " occurs more than once in the 'DataFrame'.",
+          "Please use different suffixes for the intersected columns.")
+      }
+      col <- alias(col, newJoin)
+    }
+    col
+  })
+  cols
+}
 
 #' UnionAll
 #'
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 67d8b23cd7b8..540854d114b2 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1105,11 +1105,40 @@ test_that("join() and merge() on a DataFrame", {
   expect_equal(count(joined9), 4)
   expect_true(is.na(collect(orderBy(joined9, joined9$age))$age[2]))
 
-  merged <- select(merge(df, df2, df$name == df2$name, "outer"),
-                   alias(df$age + 5, "newAge"), df$name, df2$test)
-  expect_equal(names(merged), c("newAge", "name", "test"))
+  merged <- merge(df, df2, by.x = "name", by.y = "name", all.x = TRUE, all.y = TRUE)
   expect_equal(count(merged), 4)
-  expect_equal(collect(orderBy(merged, merged$name))$newAge[3], 24)
+  expect_equal(names(merged), c("age", "name_x", "name_y", "test"))
+  expect_equal(collect(orderBy(merged, merged$name_x))$age[3], 19)
+
+  merged <- merge(df, df2, suffixes = c("-X","-Y"))
+  expect_equal(count(merged), 3)
+  expect_equal(names(merged), c("age", "name-X", "name-Y", "test"))
+  expect_equal(collect(orderBy(merged, merged$"name-X"))$age[1], 30)
+
+  merged <- merge(df, df2, by = "name", suffixes = c("-X","-Y"), sort = FALSE)
+  expect_equal(count(merged), 3)
+  expect_equal(names(merged), c("age", "name-X", "name-Y", "test"))
+  expect_equal(collect(orderBy(merged, merged$"name-Y"))$"name-X"[3], "Michael")
+
+  merged <- merge(df, df2, by = "name", all = T, sort = T)
+  expect_equal(count(merged), 4)
+  expect_equal(names(merged), c("age", "name_x", "name_y", "test"))
+  expect_equal(collect(orderBy(merged, merged$"name_y"))$"name_x"[1], "Andy")
+
+  merged <- merge(df, df2, by = NULL)
+  expect_equal(count(merged), 12)
+  expect_equal(names(merged), c("age", "name", "name", "test"))
+
+  mockLines3 <- c("{\"name\":\"Michael\", \"name_y\":\"Michael\", \"test\": \"yes\"}",
+                  "{\"name\":\"Andy\", \"name_y\":\"Andy\", \"test\": \"no\"}",
+                  "{\"name\":\"Justin\", \"name_y\":\"Justin\", \"test\": \"yes\"}",
+                  "{\"name\":\"Bob\", \"name_y\":\"Bob\", \"test\": \"yes\"}")
+  jsonPath3 <- tempfile(pattern="sparkr-test", fileext=".tmp")
+  writeLines(mockLines3, jsonPath3)
+  df3 <- jsonFile(sqlContext, jsonPath3)
+  expect_error(merge(df, df3),
+               paste("The following column name: name_y occurs more than once in the 'DataFrame'.",
+                     "Please use different suffixes for the intersected columns.", sep = ""))
 })
 
 test_that("toJSON() returns an RDD of the correct values", {

From b60aab8a95e2a35a1d4023a9d0a0d9724e4164f9 Mon Sep 17 00:00:00 2001
From: Frank Rosner <frank@fam-rosner.de>
Date: Mon, 26 Oct 2015 15:46:59 -0700
Subject: [PATCH 364/896] [SPARK-11258] Converting a Spark DataFrame into an R
 data.frame is slow / requires a lot of memory

https://issues.apache.org/jira/browse/SPARK-11258

I was not able to locate an existing unit test for this function so I wrote one.

Author: Frank Rosner <frank@fam-rosner.de>

Closes #9222 from FRosner/master.
---
 .../org/apache/spark/sql/api/r/SQLUtils.scala | 16 ++++----
 .../spark/sql/api/r/SQLUtilsSuite.scala       | 38 +++++++++++++++++++
 2 files changed, 47 insertions(+), 7 deletions(-)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/api/r/SQLUtilsSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
index b0120a8d0dc4..b3f134614c6b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/api/r/SQLUtils.scala
@@ -130,16 +130,18 @@ private[r] object SQLUtils {
   }
 
   def dfToCols(df: DataFrame): Array[Array[Any]] = {
-    // localDF is Array[Row]
-    val localDF = df.collect()
+    val localDF: Array[Row] = df.collect()
     val numCols = df.columns.length
+    val numRows = localDF.length
 
-    // result is Array[Array[Any]]
-    (0 until numCols).map { colIdx =>
-      localDF.map { row =>
-        row(colIdx)
+    val colArray = new Array[Array[Any]](numCols)
+    for (colNo <- 0 until numCols) {
+      colArray(colNo) = new Array[Any](numRows)
+      for (rowNo <- 0 until numRows) {
+        colArray(colNo)(rowNo) = localDF(rowNo)(colNo)
       }
-    }.toArray
+    }
+    colArray
   }
 
   def saveMode(mode: String): SaveMode = {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/api/r/SQLUtilsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/api/r/SQLUtilsSuite.scala
new file mode 100644
index 000000000000..f54e23e3aa6c
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/api/r/SQLUtilsSuite.scala
@@ -0,0 +1,38 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql.api.r
+
+import org.apache.spark.sql.test.SharedSQLContext
+
+class SQLUtilsSuite extends SharedSQLContext {
+
+  import testImplicits._
+
+  test("dfToCols should collect and transpose a data frame") {
+    val df = Seq(
+      (1, 2, 3),
+      (4, 5, 6)
+    ).toDF
+    assert(SQLUtils.dfToCols(df) === Array(
+      Array(1, 4),
+      Array(2, 5),
+      Array(3, 6)
+    ))
+  }
+
+}

From 4bb2b3698ffed58cc5159db36f8b11573ad26b23 Mon Sep 17 00:00:00 2001
From: Alexander Slesarenko <avslesarenko@gmail.com>
Date: Mon, 26 Oct 2015 23:49:14 +0100
Subject: [PATCH 365/896] [SQL][DOC] Minor document fixes in interfaces.scala

rxin just noticed this while reading the code.

Author: Alexander Slesarenko <avslesarenko@gmail.com>

Closes #9284 from aslesarenko/doc-typos.
---
 .../org/apache/spark/sql/sources/interfaces.scala  | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 84eef0f8a672..a9a013e936fd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -43,7 +43,7 @@ import org.apache.spark.util.SerializableConfiguration
  * This allows users to give the data source alias as the format type over the fully qualified
  * class name.
  *
- * A new instance of this class with be instantiated each time a DDL call is made.
+ * A new instance of this class will be instantiated each time a DDL call is made.
  *
  * @since 1.5.0
  */
@@ -74,7 +74,7 @@ trait DataSourceRegister {
  * less verbose invocation.  For example, 'org.apache.spark.sql.json' would resolve to the
  * data source 'org.apache.spark.sql.json.DefaultSource'
  *
- * A new instance of this class with be instantiated each time a DDL call is made.
+ * A new instance of this class will be instantiated each time a DDL call is made.
  *
  * @since 1.3.0
  */
@@ -100,7 +100,7 @@ trait RelationProvider {
  * less verbose invocation.  For example, 'org.apache.spark.sql.json' would resolve to the
  * data source 'org.apache.spark.sql.json.DefaultSource'
  *
- * A new instance of this class with be instantiated each time a DDL call is made.
+ * A new instance of this class will be instantiated each time a DDL call is made.
  *
  * The difference between a [[RelationProvider]] and a [[SchemaRelationProvider]] is that
  * users need to provide a schema when using a [[SchemaRelationProvider]].
@@ -135,7 +135,7 @@ trait SchemaRelationProvider {
  * less verbose invocation.  For example, 'org.apache.spark.sql.json' would resolve to the
  * data source 'org.apache.spark.sql.json.DefaultSource'
  *
- * A new instance of this class with be instantiated each time a DDL call is made.
+ * A new instance of this class will be instantiated each time a DDL call is made.
  *
  * The difference between a [[RelationProvider]] and a [[HadoopFsRelationProvider]] is
  * that users need to provide a schema and a (possibly empty) list of partition columns when
@@ -195,7 +195,7 @@ trait CreatableRelationProvider {
  * implementation should inherit from one of the descendant `Scan` classes, which define various
  * abstract methods for execution.
  *
- * BaseRelations must also define a equality function that only returns true when the two
+ * BaseRelations must also define an equality function that only returns true when the two
  * instances will return the same data. This equality function is used when determining when
  * it is safe to substitute cached results for a given relation.
  *
@@ -208,7 +208,7 @@ abstract class BaseRelation {
 
   /**
    * Returns an estimated size of this relation in bytes. This information is used by the planner
-   * to decided when it is safe to broadcast a relation and can be overridden by sources that
+   * to decide when it is safe to broadcast a relation and can be overridden by sources that
    * know the size ahead of time. By default, the system will assume that tables are too
    * large to broadcast. This method will be called multiple times during query planning
    * and thus should not perform expensive operations for each invocation.
@@ -383,7 +383,7 @@ abstract class OutputWriter {
 
 /**
  * ::Experimental::
- * A [[BaseRelation]] that provides much of the common code required for formats that store their
+ * A [[BaseRelation]] that provides much of the common code required for relations that store their
  * data to an HDFS compatible filesystem.
  *
  * For the read path, similar to [[PrunedFilteredScan]], it can eliminate unneeded columns and

From d4c397a64af4cec899fdaa3e617ed20333cc567d Mon Sep 17 00:00:00 2001
From: Nong Li <nongli@gmail.com>
Date: Mon, 26 Oct 2015 18:27:02 -0700
Subject: [PATCH 366/896] [SPARK-11325] [SQL] Alias 'alias' in Scala's
 DataFrame API

Author: Nong Li <nongli@gmail.com>

Closes #9286 from nongli/spark-11325.
---
 .../scala/org/apache/spark/sql/DataFrame.scala     | 14 ++++++++++++++
 .../org/apache/spark/sql/DataFrameSuite.scala      |  7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 25ad3bb993f4..32d9b0b1d988 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -698,6 +698,20 @@ class DataFrame private[sql](
    */
   def as(alias: Symbol): DataFrame = as(alias.name)
 
+  /**
+   * Returns a new [[DataFrame]] with an alias set. Same as `as`.
+   * @group dfops
+   * @since 1.6.0
+   */
+  def alias(alias: String): DataFrame = as(alias)
+
+  /**
+   * (Scala-specific) Returns a new [[DataFrame]] with an alias set. Same as `as`.
+   * @group dfops
+   * @since 1.6.0
+   */
+  def alias(alias: Symbol): DataFrame = as(alias)
+
   /**
    * Selects a set of column based expressions.
    * {{{
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index f4c7aa34e560..59565a6b13d4 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -105,6 +105,13 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     assert(testData.head(2).head.schema === testData.schema)
   }
 
+  test("dataframe alias") {
+    val df = Seq(Tuple1(1)).toDF("c").as("t")
+    val dfAlias = df.alias("t2")
+    df.col("t.c")
+    dfAlias.col("t2.c")
+  }
+
   test("simple explode") {
     val df = Seq(Tuple1("a b c"), Tuple1("d e")).toDF("words")
 

From 82464fb2e02ca4e4d425017815090497b79dc93f Mon Sep 17 00:00:00 2001
From: Stephen De Gennaro <stepheng@realitymine.com>
Date: Mon, 26 Oct 2015 19:55:10 -0700
Subject: [PATCH 367/896] [SPARK-10947] [SQL] With schema inference from JSON
 into a Dataframe, add option to infer all primitive object types as strings

Currently, when a schema is inferred from a JSON file using sqlContext.read.json, the primitive object types are inferred as string, long, boolean, etc.

However, if the inferred type is too specific (JSON obviously does not enforce types itself), this can cause issues with merging dataframe schemas.

This pull request adds the option "primitivesAsString" to the JSON DataFrameReader which when true (defaults to false if not set) will infer all primitives as strings.

Below is an example usage of this new functionality.
```
val jsonDf = sqlContext.read.option("primitivesAsString", "true").json(sampleJsonFile)

scala> jsonDf.printSchema()
root
|-- bigInteger: string (nullable = true)
|-- boolean: string (nullable = true)
|-- double: string (nullable = true)
|-- integer: string (nullable = true)
|-- long: string (nullable = true)
|-- null: string (nullable = true)
|-- string: string (nullable = true)
```

Author: Stephen De Gennaro <stepheng@realitymine.com>

Closes #9249 from stephend-realitymine/stephend-primitives.
---
 .../apache/spark/sql/DataFrameReader.scala    |  10 +-
 .../datasources/json/InferSchema.scala        |  20 ++-
 .../datasources/json/JSONRelation.scala       |  14 +-
 .../datasources/json/JsonSuite.scala          | 138 +++++++++++++++++-
 4 files changed, 171 insertions(+), 11 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index 824220d85e04..6a194a443ab1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -256,8 +256,16 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    */
   def json(jsonRDD: RDD[String]): DataFrame = {
     val samplingRatio = extraOptions.getOrElse("samplingRatio", "1.0").toDouble
+    val primitivesAsString = extraOptions.getOrElse("primitivesAsString", "false").toBoolean
     sqlContext.baseRelationToDataFrame(
-      new JSONRelation(Some(jsonRDD), samplingRatio, userSpecifiedSchema, None, None)(sqlContext))
+      new JSONRelation(
+        Some(jsonRDD),
+        samplingRatio,
+        primitivesAsString,
+        userSpecifiedSchema,
+        None,
+        None)(sqlContext)
+    )
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
index d0780028dacb..b9914c581a65 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
@@ -35,7 +35,8 @@ private[sql] object InferSchema {
   def apply(
       json: RDD[String],
       samplingRatio: Double = 1.0,
-      columnNameOfCorruptRecords: String): StructType = {
+      columnNameOfCorruptRecords: String,
+      primitivesAsString: Boolean = false): StructType = {
     require(samplingRatio > 0, s"samplingRatio ($samplingRatio) should be greater than 0")
     val schemaData = if (samplingRatio > 0.99) {
       json
@@ -50,7 +51,7 @@ private[sql] object InferSchema {
         try {
           Utils.tryWithResource(factory.createParser(row)) { parser =>
             parser.nextToken()
-            inferField(parser)
+            inferField(parser, primitivesAsString)
           }
         } catch {
           case _: JsonParseException =>
@@ -70,14 +71,14 @@ private[sql] object InferSchema {
   /**
    * Infer the type of a json document from the parser's token stream
    */
-  private def inferField(parser: JsonParser): DataType = {
+  private def inferField(parser: JsonParser, primitivesAsString: Boolean): DataType = {
     import com.fasterxml.jackson.core.JsonToken._
     parser.getCurrentToken match {
       case null | VALUE_NULL => NullType
 
       case FIELD_NAME =>
         parser.nextToken()
-        inferField(parser)
+        inferField(parser, primitivesAsString)
 
       case VALUE_STRING if parser.getTextLength < 1 =>
         // Zero length strings and nulls have special handling to deal
@@ -92,7 +93,10 @@ private[sql] object InferSchema {
       case START_OBJECT =>
         val builder = Seq.newBuilder[StructField]
         while (nextUntil(parser, END_OBJECT)) {
-          builder += StructField(parser.getCurrentName, inferField(parser), nullable = true)
+          builder += StructField(
+            parser.getCurrentName,
+            inferField(parser, primitivesAsString),
+            nullable = true)
         }
 
         StructType(builder.result().sortBy(_.name))
@@ -103,11 +107,15 @@ private[sql] object InferSchema {
         // the type as we pass through all JSON objects.
         var elementType: DataType = NullType
         while (nextUntil(parser, END_ARRAY)) {
-          elementType = compatibleType(elementType, inferField(parser))
+          elementType = compatibleType(elementType, inferField(parser, primitivesAsString))
         }
 
         ArrayType(elementType)
 
+      case (VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT) if primitivesAsString => StringType
+
+      case (VALUE_TRUE | VALUE_FALSE) if primitivesAsString => StringType
+
       case VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT =>
         import JsonParser.NumberType._
         parser.getNumberType match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index 794b889a9362..5f104fca7d62 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -52,14 +52,23 @@ class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
       partitionColumns: Option[StructType],
       parameters: Map[String, String]): HadoopFsRelation = {
     val samplingRatio = parameters.get("samplingRatio").map(_.toDouble).getOrElse(1.0)
+    val primitivesAsString = parameters.get("primitivesAsString").map(_.toBoolean).getOrElse(false)
 
-    new JSONRelation(None, samplingRatio, dataSchema, None, partitionColumns, paths)(sqlContext)
+    new JSONRelation(
+      None,
+      samplingRatio,
+      primitivesAsString,
+      dataSchema,
+      None,
+      partitionColumns,
+      paths)(sqlContext)
   }
 }
 
 private[sql] class JSONRelation(
     val inputRDD: Option[RDD[String]],
     val samplingRatio: Double,
+    val primitivesAsString: Boolean,
     val maybeDataSchema: Option[StructType],
     val maybePartitionSpec: Option[PartitionSpec],
     override val userDefinedPartitionColumns: Option[StructType],
@@ -105,7 +114,8 @@ private[sql] class JSONRelation(
       InferSchema(
         inputRDD.getOrElse(createBaseRdd(files)),
         samplingRatio,
-        sqlContext.conf.columnNameOfCorruptRecord)
+        sqlContext.conf.columnNameOfCorruptRecord,
+        primitivesAsString)
     }
     checkConstraints(jsonSchema)
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index 7540223bf277..d3fd409291f2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -632,6 +632,136 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
     )
   }
 
+  test("Loading a JSON dataset primitivesAsString returns schema with primitive types as strings") {
+    val dir = Utils.createTempDir()
+    dir.delete()
+    val path = dir.getCanonicalPath
+    primitiveFieldAndType.map(record => record.replaceAll("\n", " ")).saveAsTextFile(path)
+    val jsonDF = sqlContext.read.option("primitivesAsString", "true").json(path)
+
+    val expectedSchema = StructType(
+      StructField("bigInteger", StringType, true) ::
+      StructField("boolean", StringType, true) ::
+      StructField("double", StringType, true) ::
+      StructField("integer", StringType, true) ::
+      StructField("long", StringType, true) ::
+      StructField("null", StringType, true) ::
+      StructField("string", StringType, true) :: Nil)
+
+    assert(expectedSchema === jsonDF.schema)
+
+    jsonDF.registerTempTable("jsonTable")
+
+    checkAnswer(
+      sql("select * from jsonTable"),
+      Row("92233720368547758070",
+      "true",
+      "1.7976931348623157E308",
+      "10",
+      "21474836470",
+      null,
+      "this is a simple string.")
+    )
+  }
+
+  test("Loading a JSON dataset primitivesAsString returns complex fields as strings") {
+    val jsonDF = sqlContext.read.option("primitivesAsString", "true").json(complexFieldAndType1)
+
+    val expectedSchema = StructType(
+      StructField("arrayOfArray1", ArrayType(ArrayType(StringType, true), true), true) ::
+      StructField("arrayOfArray2", ArrayType(ArrayType(StringType, true), true), true) ::
+      StructField("arrayOfBigInteger", ArrayType(StringType, true), true) ::
+      StructField("arrayOfBoolean", ArrayType(StringType, true), true) ::
+      StructField("arrayOfDouble", ArrayType(StringType, true), true) ::
+      StructField("arrayOfInteger", ArrayType(StringType, true), true) ::
+      StructField("arrayOfLong", ArrayType(StringType, true), true) ::
+      StructField("arrayOfNull", ArrayType(StringType, true), true) ::
+      StructField("arrayOfString", ArrayType(StringType, true), true) ::
+      StructField("arrayOfStruct", ArrayType(
+        StructType(
+          StructField("field1", StringType, true) ::
+          StructField("field2", StringType, true) ::
+          StructField("field3", StringType, true) :: Nil), true), true) ::
+      StructField("struct", StructType(
+        StructField("field1", StringType, true) ::
+        StructField("field2", StringType, true) :: Nil), true) ::
+      StructField("structWithArrayFields", StructType(
+        StructField("field1", ArrayType(StringType, true), true) ::
+        StructField("field2", ArrayType(StringType, true), true) :: Nil), true) :: Nil)
+
+    assert(expectedSchema === jsonDF.schema)
+
+    jsonDF.registerTempTable("jsonTable")
+
+    // Access elements of a primitive array.
+    checkAnswer(
+      sql("select arrayOfString[0], arrayOfString[1], arrayOfString[2] from jsonTable"),
+      Row("str1", "str2", null)
+    )
+
+    // Access an array of null values.
+    checkAnswer(
+      sql("select arrayOfNull from jsonTable"),
+      Row(Seq(null, null, null, null))
+    )
+
+    // Access elements of a BigInteger array (we use DecimalType internally).
+    checkAnswer(
+      sql("select arrayOfBigInteger[0], arrayOfBigInteger[1], arrayOfBigInteger[2] from jsonTable"),
+      Row("922337203685477580700", "-922337203685477580800", null)
+    )
+
+    // Access elements of an array of arrays.
+    checkAnswer(
+      sql("select arrayOfArray1[0], arrayOfArray1[1] from jsonTable"),
+      Row(Seq("1", "2", "3"), Seq("str1", "str2"))
+    )
+
+    // Access elements of an array of arrays.
+    checkAnswer(
+      sql("select arrayOfArray2[0], arrayOfArray2[1] from jsonTable"),
+      Row(Seq("1", "2", "3"), Seq("1.1", "2.1", "3.1"))
+    )
+
+    // Access elements of an array inside a filed with the type of ArrayType(ArrayType).
+    checkAnswer(
+      sql("select arrayOfArray1[1][1], arrayOfArray2[1][1] from jsonTable"),
+      Row("str2", "2.1")
+    )
+
+    // Access elements of an array of structs.
+    checkAnswer(
+      sql("select arrayOfStruct[0], arrayOfStruct[1], arrayOfStruct[2], arrayOfStruct[3] " +
+        "from jsonTable"),
+      Row(
+        Row("true", "str1", null),
+        Row("false", null, null),
+        Row(null, null, null),
+        null)
+    )
+
+    // Access a struct and fields inside of it.
+    checkAnswer(
+      sql("select struct, struct.field1, struct.field2 from jsonTable"),
+      Row(
+        Row("true", "92233720368547758070"),
+        "true",
+        "92233720368547758070") :: Nil
+    )
+
+    // Access an array field of a struct.
+    checkAnswer(
+      sql("select structWithArrayFields.field1, structWithArrayFields.field2 from jsonTable"),
+      Row(Seq("4", "5", "6"), Seq("str1", "str2"))
+    )
+
+    // Access elements of an array field of a struct.
+    checkAnswer(
+      sql("select structWithArrayFields.field1[1], structWithArrayFields.field2[3] from jsonTable"),
+      Row("5", null)
+    )
+  }
+
   test("Loading a JSON dataset from a text file with SQL") {
     val dir = Utils.createTempDir()
     dir.delete()
@@ -960,9 +1090,9 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
 
     val jsonDF = sqlContext.read.json(primitiveFieldAndType)
     val primTable = sqlContext.read.json(jsonDF.toJSON)
-    primTable.registerTempTable("primativeTable")
+    primTable.registerTempTable("primitiveTable")
     checkAnswer(
-        sql("select * from primativeTable"),
+        sql("select * from primitiveTable"),
       Row(new java.math.BigDecimal("92233720368547758070"),
         true,
         1.7976931348623157E308,
@@ -1039,24 +1169,28 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
     val relation0 = new JSONRelation(
       Some(empty),
       1.0,
+      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
       None, None)(sqlContext)
     val logicalRelation0 = LogicalRelation(relation0)
     val relation1 = new JSONRelation(
       Some(singleRow),
       1.0,
+      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
       None, None)(sqlContext)
     val logicalRelation1 = LogicalRelation(relation1)
     val relation2 = new JSONRelation(
       Some(singleRow),
       0.5,
+      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
       None, None)(sqlContext)
     val logicalRelation2 = LogicalRelation(relation2)
     val relation3 = new JSONRelation(
       Some(singleRow),
       1.0,
+      false,
       Some(StructType(StructField("b", IntegerType, true) :: Nil)),
       None, None)(sqlContext)
     val logicalRelation3 = LogicalRelation(relation3)

From dc3220ce11c7513b1452c82ee82cb86e908bcc2d Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Mon, 26 Oct 2015 20:58:18 -0700
Subject: [PATCH 368/896] [SPARK-11209][SPARKR] Add window functions into
 SparkR [step 1].

Author: Sun Rui <rui.sun@intel.com>

Closes #9193 from sun-rui/SPARK-11209.
---
 R/pkg/NAMESPACE                               |  4 +
 R/pkg/R/functions.R                           | 98 +++++++++++++++++++
 R/pkg/R/generics.R                            | 16 +++
 R/pkg/inst/tests/test_sparkSQL.R              |  2 +
 .../apache/spark/api/r/RBackendHandler.scala  |  3 +-
 5 files changed, 122 insertions(+), 1 deletion(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 52f7a0106aae..b73bed312824 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -119,6 +119,7 @@ exportMethods("%in%",
               "count",
               "countDistinct",
               "crc32",
+              "cumeDist",
               "date_add",
               "date_format",
               "date_sub",
@@ -150,8 +151,10 @@ exportMethods("%in%",
               "isNaN",
               "isNotNull",
               "isNull",
+              "lag",
               "last",
               "last_day",
+              "lead",
               "least",
               "length",
               "levenshtein",
@@ -177,6 +180,7 @@ exportMethods("%in%",
               "nanvl",
               "negate",
               "next_day",
+              "ntile",
               "otherwise",
               "pmod",
               "quarter",
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index a72fb7bb42fe..366290fe6627 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -2013,3 +2013,101 @@ setMethod("ifelse",
                                 "otherwise", no)
               column(jc)
           })
+
+###################### Window functions######################
+
+#' cumeDist
+#'
+#' Window function: returns the cumulative distribution of values within a window partition,
+#' i.e. the fraction of rows that are below the current row.
+#' 
+#'   N = total number of rows in the partition
+#'   cumeDist(x) = number of values before (and including) x / N
+#'   
+#' This is equivalent to the CUME_DIST function in SQL.
+#'
+#' @rdname cumeDist
+#' @name cumeDist
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{cumeDist()}
+setMethod("cumeDist",
+          signature(x = "missing"),
+          function() {
+            jc <- callJStatic("org.apache.spark.sql.functions", "cumeDist")
+            column(jc)
+          })
+
+#' lag
+#'
+#' Window function: returns the value that is `offset` rows before the current row, and
+#' `defaultValue` if there is less than `offset` rows before the current row. For example,
+#' an `offset` of one will return the previous row at any given point in the window partition.
+#' 
+#' This is equivalent to the LAG function in SQL.
+#'
+#' @rdname lag
+#' @name lag
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{lag(df$c)}
+setMethod("lag",
+          signature(x = "characterOrColumn", offset = "numeric", defaultValue = "ANY"),
+          function(x, offset, defaultValue = NULL) {
+            col <- if (class(x) == "Column") {
+              x@jc
+            } else {
+              x
+            }
+
+            jc <- callJStatic("org.apache.spark.sql.functions",
+                              "lag", col, as.integer(offset), defaultValue)
+            column(jc)
+          })
+
+#' lead
+#'
+#' Window function: returns the value that is `offset` rows after the current row, and
+#' `null` if there is less than `offset` rows after the current row. For example,
+#' an `offset` of one will return the next row at any given point in the window partition.
+#' 
+#' This is equivalent to the LEAD function in SQL.
+#'
+#' @rdname lead
+#' @name lead
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{lead(df$c)}
+setMethod("lead",
+          signature(x = "characterOrColumn", offset = "numeric", defaultValue = "ANY"),
+          function(x, offset, defaultValue = NULL) {
+            col <- if (class(x) == "Column") {
+              x@jc
+            } else {
+              x
+            }
+
+            jc <- callJStatic("org.apache.spark.sql.functions",
+                              "lead", col, as.integer(offset), defaultValue)
+            column(jc)
+          })
+
+#' ntile
+#'
+#' Window function: returns the ntile group id (from 1 to `n` inclusive) in an ordered window
+#' partition. Fow example, if `n` is 4, the first quarter of the rows will get value 1, the second
+#' quarter will get 2, the third quarter will get 3, and the last quarter will get 4.
+#' 
+#' This is equivalent to the NTILE function in SQL.
+#'
+#' @rdname ntile
+#' @name ntile
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{ntile(1)}
+setMethod("ntile",
+          signature(x = "numeric"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "ntile", as.integer(x))
+            column(jc)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 4a419f785e92..c11c3c8d3e15 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -714,6 +714,10 @@ setGeneric("countDistinct", function(x, ...) { standardGeneric("countDistinct")
 #' @export
 setGeneric("crc32", function(x) { standardGeneric("crc32") })
 
+#' @rdname cumeDist
+#' @export
+setGeneric("cumeDist", function(x) { standardGeneric("cumeDist") })
+
 #' @rdname datediff
 #' @export
 setGeneric("datediff", function(y, x) { standardGeneric("datediff") })
@@ -790,6 +794,10 @@ setGeneric("instr", function(y, x) { standardGeneric("instr") })
 #' @export
 setGeneric("isNaN", function(x) { standardGeneric("isNaN") })
 
+#' @rdname lag
+#' @export
+setGeneric("lag", function(x, offset, defaultValue = NULL) { standardGeneric("lag") })
+
 #' @rdname last
 #' @export
 setGeneric("last", function(x) { standardGeneric("last") })
@@ -798,6 +806,10 @@ setGeneric("last", function(x) { standardGeneric("last") })
 #' @export
 setGeneric("last_day", function(x) { standardGeneric("last_day") })
 
+#' @rdname lead
+#' @export
+setGeneric("lead", function(x, offset, defaultValue = NULL) { standardGeneric("lead") })
+
 #' @rdname least
 #' @export
 setGeneric("least", function(x, ...) { standardGeneric("least") })
@@ -858,6 +870,10 @@ setGeneric("negate", function(x) { standardGeneric("negate") })
 #' @export
 setGeneric("next_day", function(y, x) { standardGeneric("next_day") })
 
+#' @rdname ntile
+#' @export
+setGeneric("ntile", function(x) { standardGeneric("ntile") })
+
 #' @rdname countDistinct
 #' @export
 setGeneric("n_distinct", function(x, ...) { standardGeneric("n_distinct") })
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 540854d114b2..e1d4499925fe 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -829,6 +829,8 @@ test_that("column functions", {
   c9 <- signum(c) + sin(c) + sinh(c) + size(c) + soundex(c) + sqrt(c) + sum(c)
   c10 <- sumDistinct(c) + tan(c) + tanh(c) + toDegrees(c) + toRadians(c)
   c11 <- to_date(c) + trim(c) + unbase64(c) + unhex(c) + upper(c)
+  c12 <- lead("col", 1) + lead(c, 1) + lag("col", 1) + lag(c, 1)
+  c13 <- cumeDist() + ntile(1)
 
   df <- jsonFile(sqlContext, jsonPath)
   df2 <- select(df, between(df$age, c(20, 30)), between(df$age, c(10, 20)))
diff --git a/core/src/main/scala/org/apache/spark/api/r/RBackendHandler.scala b/core/src/main/scala/org/apache/spark/api/r/RBackendHandler.scala
index 2a792d81994f..0095548c463c 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RBackendHandler.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RBackendHandler.scala
@@ -224,7 +224,8 @@ private[r] class RBackendHandler(server: RBackend)
                 case _ => parameterType
               }
             }
-            if (!parameterWrapperType.isInstance(args(i))) {
+            if ((parameterType.isPrimitive || args(i) != null) &&
+                !parameterWrapperType.isInstance(args(i))) {
               argMatched = false
             }
           }

From a150e6c1b03b64a35855b8074b2fe077a6081a34 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 26 Oct 2015 21:14:26 -0700
Subject: [PATCH 369/896] [SPARK-10562] [SQL] support mixed case partitionBy
 column names for tables stored in metastore

https://issues.apache.org/jira/browse/SPARK-10562

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9226 from cloud-fan/par.
---
 .../spark/sql/hive/HiveMetastoreCatalog.scala | 61 +++++++++++--------
 .../sql/hive/MetastoreDataSourcesSuite.scala  |  9 ++-
 .../sql/hive/execution/SQLQuerySuite.scala    | 11 ++++
 3 files changed, 54 insertions(+), 27 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index fdb576bedbba..f4d45714fae4 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -143,6 +143,21 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
           }
         }
 
+        def partColsFromParts: Option[Seq[String]] = {
+          table.properties.get("spark.sql.sources.schema.numPartCols").map { numPartCols =>
+            (0 until numPartCols.toInt).map { index =>
+              val partCol = table.properties.get(s"spark.sql.sources.schema.partCol.$index").orNull
+              if (partCol == null) {
+                throw new AnalysisException(
+                  "Could not read partitioned columns from the metastore because it is corrupted " +
+                    s"(missing part $index of the it, $numPartCols parts are expected).")
+              }
+
+              partCol
+            }
+          }
+        }
+
         // Originally, we used spark.sql.sources.schema to store the schema of a data source table.
         // After SPARK-6024, we removed this flag.
         // Although we are not using spark.sql.sources.schema any more, we need to still support.
@@ -155,7 +170,7 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         // We only need names at here since userSpecifiedSchema we loaded from the metastore
         // contains partition columns. We can always get datatypes of partitioning columns
         // from userSpecifiedSchema.
-        val partitionColumns = table.partitionColumns.map(_.name)
+        val partitionColumns = partColsFromParts.getOrElse(Nil)
 
         // It does not appear that the ql client for the metastore has a way to enumerate all the
         // SerDe properties directly...
@@ -218,25 +233,21 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       }
     }
 
-    val metastorePartitionColumns = userSpecifiedSchema.map { schema =>
-      val fields = partitionColumns.map(col => schema(col))
-      fields.map { field =>
-        HiveColumn(
-          name = field.name,
-          hiveType = HiveMetastoreTypes.toMetastoreType(field.dataType),
-          comment = "")
-      }.toSeq
-    }.getOrElse {
-      if (partitionColumns.length > 0) {
-        // The table does not have a specified schema, which means that the schema will be inferred
-        // when we load the table. So, we are not expecting partition columns and we will discover
-        // partitions when we load the table. However, if there are specified partition columns,
-        // we simply ignore them and provide a warning message.
-        logWarning(
-          s"The schema and partitions of table $tableIdent will be inferred when it is loaded. " +
-            s"Specified partition columns (${partitionColumns.mkString(",")}) will be ignored.")
+    if (userSpecifiedSchema.isDefined && partitionColumns.length > 0) {
+      tableProperties.put("spark.sql.sources.schema.numPartCols", partitionColumns.length.toString)
+      partitionColumns.zipWithIndex.foreach { case (partCol, index) =>
+        tableProperties.put(s"spark.sql.sources.schema.partCol.$index", partCol)
       }
-      Seq.empty[HiveColumn]
+    }
+
+    if (userSpecifiedSchema.isEmpty && partitionColumns.length > 0) {
+      // The table does not have a specified schema, which means that the schema will be inferred
+      // when we load the table. So, we are not expecting partition columns and we will discover
+      // partitions when we load the table. However, if there are specified partition columns,
+      // we simply ignore them and provide a warning message.
+      logWarning(
+        s"The schema and partitions of table $tableIdent will be inferred when it is loaded. " +
+          s"Specified partition columns (${partitionColumns.mkString(",")}) will be ignored.")
     }
 
     val tableType = if (isExternal) {
@@ -255,8 +266,8 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
       HiveTable(
         specifiedDatabase = Option(dbName),
         name = tblName,
-        schema = Seq.empty,
-        partitionColumns = metastorePartitionColumns,
+        schema = Nil,
+        partitionColumns = Nil,
         tableType = tableType,
         properties = tableProperties.toMap,
         serdeProperties = options)
@@ -272,14 +283,14 @@ private[hive] class HiveMetastoreCatalog(val client: ClientInterface, hive: Hive
         }
       }
 
-      val partitionColumns = schemaToHiveColumn(relation.partitionColumns)
-      val dataColumns = schemaToHiveColumn(relation.schema).filterNot(partitionColumns.contains)
+      assert(partitionColumns.isEmpty)
+      assert(relation.partitionColumns.isEmpty)
 
       HiveTable(
         specifiedDatabase = Option(dbName),
         name = tblName,
-        schema = dataColumns,
-        partitionColumns = partitionColumns,
+        schema = schemaToHiveColumn(relation.schema),
+        partitionColumns = Nil,
         tableType = tableType,
         properties = tableProperties.toMap,
         serdeProperties = options,
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
index d2928876887b..f74eb1500b98 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/MetastoreDataSourcesSuite.scala
@@ -753,10 +753,15 @@ class MetastoreDataSourcesSuite extends QueryTest with SQLTestUtils with TestHiv
       invalidateTable(tableName)
       val metastoreTable = catalog.client.getTable("default", tableName)
       val expectedPartitionColumns = StructType(df.schema("d") :: df.schema("b") :: Nil)
+
+      val numPartCols = metastoreTable.properties("spark.sql.sources.schema.numPartCols").toInt
+      assert(numPartCols == 2)
+
       val actualPartitionColumns =
         StructType(
-          metastoreTable.partitionColumns.map(c =>
-            StructField(c.name, HiveMetastoreTypes.toDataType(c.hiveType))))
+          (0 until numPartCols).map { index =>
+            df.schema(metastoreTable.properties(s"spark.sql.sources.schema.partCol.$index"))
+          })
       // Make sure partition columns are correctly stored in metastore.
       assert(
         expectedPartitionColumns.sameType(actualPartitionColumns),
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 396150be76e8..fd380641dcc7 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1410,4 +1410,15 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       }
     }
   }
+
+  test("SPARK-10562: partition by column with mixed case name") {
+    withTable("tbl10562") {
+      val df = Seq(2012 -> "a").toDF("Year", "val")
+      df.write.partitionBy("Year").saveAsTable("tbl10562")
+      checkAnswer(sql("SELECT Year FROM tbl10562"), Row(2012))
+      checkAnswer(sql("SELECT yEAr FROM tbl10562"), Row(2012))
+      checkAnswer(sql("SELECT val FROM tbl10562 WHERE Year > 2015"), Nil)
+      checkAnswer(sql("SELECT val FROM tbl10562 WHERE Year == 2012"), Row("a"))
+    }
+  }
 }

From 943d4fa204a827ca8ecc39d9cf04e86890ee9840 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Mon, 26 Oct 2015 21:17:53 -0700
Subject: [PATCH 370/896] [SPARK-11289][DOC] Substitute code examples in ML
 features extractors with include_example

mengxr https://issues.apache.org/jira/browse/SPARK-11289

I make some changes in ML feature extractors. I.e. TF-IDF, Word2Vec, and CountVectorizer. I add new example code in spark/examples, hope it is the right place to add those examples.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9266 from yinxusen/SPARK-11289.
---
 docs/ml-features.md                           | 217 +-----------------
 .../ml/JavaCountVectorizerExample.java        |  69 ++++++
 .../spark/examples/ml/JavaTfIdfExample.java   |  79 +++++++
 .../examples/ml/JavaWord2VecExample.java      |  67 ++++++
 examples/src/main/python/ml/tf_idf_example.py |  47 ++++
 .../src/main/python/ml/word2vec_example.py    |  45 ++++
 .../examples/ml/CountVectorizerExample.scala  |  59 +++++
 .../spark/examples/ml/TfIdfExample.scala      |  53 +++++
 .../spark/examples/ml/Word2VecExample.scala   |  53 +++++
 9 files changed, 480 insertions(+), 209 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaTfIdfExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaWord2VecExample.java
 create mode 100644 examples/src/main/python/ml/tf_idf_example.py
 create mode 100644 examples/src/main/python/ml/word2vec_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/CountVectorizerExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/TfIdfExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/Word2VecExample.scala

diff --git a/docs/ml-features.md b/docs/ml-features.md
index 44a98829393e..142afac2f3f9 100644
--- a/docs/ml-features.md
+++ b/docs/ml-features.md
@@ -37,23 +37,7 @@ In the following code segment, we start with a set of sentences.  We split each
 Refer to the [HashingTF Scala docs](api/scala/index.html#org.apache.spark.ml.feature.HashingTF) and
 the [IDF Scala docs](api/scala/index.html#org.apache.spark.ml.feature.IDF) for more details on the API.
 
-{% highlight scala %}
-import org.apache.spark.ml.feature.{HashingTF, IDF, Tokenizer}
-
-val sentenceData = sqlContext.createDataFrame(Seq(
-  (0, "Hi I heard about Spark"),
-  (0, "I wish Java could use case classes"),
-  (1, "Logistic regression models are neat")
-)).toDF("label", "sentence")
-val tokenizer = new Tokenizer().setInputCol("sentence").setOutputCol("words")
-val wordsData = tokenizer.transform(sentenceData)
-val hashingTF = new HashingTF().setInputCol("words").setOutputCol("rawFeatures").setNumFeatures(20)
-val featurizedData = hashingTF.transform(wordsData)
-val idf = new IDF().setInputCol("rawFeatures").setOutputCol("features")
-val idfModel = idf.fit(featurizedData)
-val rescaledData = idfModel.transform(featurizedData)
-rescaledData.select("features", "label").take(3).foreach(println)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/TfIdfExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
@@ -61,49 +45,7 @@ rescaledData.select("features", "label").take(3).foreach(println)
 Refer to the [HashingTF Java docs](api/java/org/apache/spark/ml/feature/HashingTF.html) and the
 [IDF Java docs](api/java/org/apache/spark/ml/feature/IDF.html) for more details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.ml.feature.HashingTF;
-import org.apache.spark.ml.feature.IDF;
-import org.apache.spark.ml.feature.Tokenizer;
-import org.apache.spark.mllib.linalg.Vector;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.Row;
-import org.apache.spark.sql.RowFactory;
-import org.apache.spark.sql.types.DataTypes;
-import org.apache.spark.sql.types.Metadata;
-import org.apache.spark.sql.types.StructField;
-import org.apache.spark.sql.types.StructType;
-
-JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
-  RowFactory.create(0, "Hi I heard about Spark"),
-  RowFactory.create(0, "I wish Java could use case classes"),
-  RowFactory.create(1, "Logistic regression models are neat")
-));
-StructType schema = new StructType(new StructField[]{
-  new StructField("label", DataTypes.DoubleType, false, Metadata.empty()),
-  new StructField("sentence", DataTypes.StringType, false, Metadata.empty())
-});
-DataFrame sentenceData = sqlContext.createDataFrame(jrdd, schema);
-Tokenizer tokenizer = new Tokenizer().setInputCol("sentence").setOutputCol("words");
-DataFrame wordsData = tokenizer.transform(sentenceData);
-int numFeatures = 20;
-HashingTF hashingTF = new HashingTF()
-  .setInputCol("words")
-  .setOutputCol("rawFeatures")
-  .setNumFeatures(numFeatures);
-DataFrame featurizedData = hashingTF.transform(wordsData);
-IDF idf = new IDF().setInputCol("rawFeatures").setOutputCol("features");
-IDFModel idfModel = idf.fit(featurizedData);
-DataFrame rescaledData = idfModel.transform(featurizedData);
-for (Row r : rescaledData.select("features", "label").take(3)) {
-  Vector features = r.getAs(0);
-  Double label = r.getDouble(1);
-  System.out.println(features);
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaTfIdfExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
@@ -111,24 +53,7 @@ for (Row r : rescaledData.select("features", "label").take(3)) {
 Refer to the [HashingTF Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.HashingTF) and
 the [IDF Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.IDF) for more details on the API.
 
-{% highlight python %}
-from pyspark.ml.feature import HashingTF, IDF, Tokenizer
-
-sentenceData = sqlContext.createDataFrame([
-  (0, "Hi I heard about Spark"),
-  (0, "I wish Java could use case classes"),
-  (1, "Logistic regression models are neat")
-], ["label", "sentence"])
-tokenizer = Tokenizer(inputCol="sentence", outputCol="words")
-wordsData = tokenizer.transform(sentenceData)
-hashingTF = HashingTF(inputCol="words", outputCol="rawFeatures", numFeatures=20)
-featurizedData = hashingTF.transform(wordsData)
-idf = IDF(inputCol="rawFeatures", outputCol="features")
-idfModel = idf.fit(featurizedData)
-rescaledData = idfModel.transform(featurizedData)
-for features_label in rescaledData.select("features", "label").take(3):
-  print(features_label)
-{% endhighlight %}
+{% include_example python/ml/tf_idf_example.py %}
 </div>
 </div>
 
@@ -149,26 +74,7 @@ In the following code segment, we start with a set of documents, each of which i
 Refer to the [Word2Vec Scala docs](api/scala/index.html#org.apache.spark.ml.feature.Word2Vec)
 for more details on the API.
 
-{% highlight scala %}
-import org.apache.spark.ml.feature.Word2Vec
-
-// Input data: Each row is a bag of words from a sentence or document.
-val documentDF = sqlContext.createDataFrame(Seq(
-  "Hi I heard about Spark".split(" "),
-  "I wish Java could use case classes".split(" "),
-  "Logistic regression models are neat".split(" ")
-).map(Tuple1.apply)).toDF("text")
-
-// Learn a mapping from words to Vectors.
-val word2Vec = new Word2Vec()
-  .setInputCol("text")
-  .setOutputCol("result")
-  .setVectorSize(3)
-  .setMinCount(0)
-val model = word2Vec.fit(documentDF)
-val result = model.transform(documentDF)
-result.select("result").take(3).foreach(println)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/Word2VecExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
@@ -176,43 +82,7 @@ result.select("result").take(3).foreach(println)
 Refer to the [Word2Vec Java docs](api/java/org/apache/spark/ml/feature/Word2Vec.html)
 for more details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.Row;
-import org.apache.spark.sql.RowFactory;
-import org.apache.spark.sql.SQLContext;
-import org.apache.spark.sql.types.*;
-
-JavaSparkContext jsc = ...
-SQLContext sqlContext = ...
-
-// Input data: Each row is a bag of words from a sentence or document.
-JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
-  RowFactory.create(Arrays.asList("Hi I heard about Spark".split(" "))),
-  RowFactory.create(Arrays.asList("I wish Java could use case classes".split(" "))),
-  RowFactory.create(Arrays.asList("Logistic regression models are neat".split(" ")))
-));
-StructType schema = new StructType(new StructField[]{
-  new StructField("text", new ArrayType(DataTypes.StringType, true), false, Metadata.empty())
-});
-DataFrame documentDF = sqlContext.createDataFrame(jrdd, schema);
-
-// Learn a mapping from words to Vectors.
-Word2Vec word2Vec = new Word2Vec()
-  .setInputCol("text")
-  .setOutputCol("result")
-  .setVectorSize(3)
-  .setMinCount(0);
-Word2VecModel model = word2Vec.fit(documentDF);
-DataFrame result = model.transform(documentDF);
-for (Row r: result.select("result").take(3)) {
-  System.out.println(r);
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaWord2VecExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
@@ -220,22 +90,7 @@ for (Row r: result.select("result").take(3)) {
 Refer to the [Word2Vec Python docs](api/python/pyspark.ml.html#pyspark.ml.feature.Word2Vec)
 for more details on the API.
 
-{% highlight python %}
-from pyspark.ml.feature import Word2Vec
-
-# Input data: Each row is a bag of words from a sentence or document.
-documentDF = sqlContext.createDataFrame([
-  ("Hi I heard about Spark".split(" "), ),
-  ("I wish Java could use case classes".split(" "), ),
-  ("Logistic regression models are neat".split(" "), )
-], ["text"])
-# Learn a mapping from words to Vectors.
-word2Vec = Word2Vec(vectorSize=3, minCount=0, inputCol="text", outputCol="result")
-model = word2Vec.fit(documentDF)
-result = model.transform(documentDF)
-for feature in result.select("result").take(3):
-  print(feature)
-{% endhighlight %}
+{% include_example python/ml/word2vec_example.py %}
 </div>
 </div>
 
@@ -283,30 +138,7 @@ Refer to the [CountVectorizer Scala docs](api/scala/index.html#org.apache.spark.
 and the [CountVectorizerModel Scala docs](api/scala/index.html#org.apache.spark.ml.feature.CountVectorizerModel)
 for more details on the API.
 
-{% highlight scala %}
-import org.apache.spark.ml.feature.CountVectorizer
-import org.apache.spark.mllib.util.CountVectorizerModel
-
-val df = sqlContext.createDataFrame(Seq(
-  (0, Array("a", "b", "c")),
-  (1, Array("a", "b", "b", "c", "a"))
-)).toDF("id", "words")
-
-// fit a CountVectorizerModel from the corpus
-val cvModel: CountVectorizerModel = new CountVectorizer()
-  .setInputCol("words")
-  .setOutputCol("features")
-  .setVocabSize(3)
-  .setMinDF(2) // a term must appear in more or equal to 2 documents to be included in the vocabulary
-  .fit(df)
-
-// alternatively, define CountVectorizerModel with a-priori vocabulary
-val cvm = new CountVectorizerModel(Array("a", "b", "c"))
-  .setInputCol("words")
-  .setOutputCol("features")
-
-cvModel.transform(df).select("features").show()
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/CountVectorizerExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
@@ -315,40 +147,7 @@ Refer to the [CountVectorizer Java docs](api/java/org/apache/spark/ml/feature/Co
 and the [CountVectorizerModel Java docs](api/java/org/apache/spark/ml/feature/CountVectorizerModel.html)
 for more details on the API.
 
-{% highlight java %}
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.ml.feature.CountVectorizer;
-import org.apache.spark.ml.feature.CountVectorizerModel;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.Row;
-import org.apache.spark.sql.RowFactory;
-import org.apache.spark.sql.types.*;
-
-// Input data: Each row is a bag of words from a sentence or document.
-JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
-  RowFactory.create(Arrays.asList("a", "b", "c")),
-  RowFactory.create(Arrays.asList("a", "b", "b", "c", "a"))
-));
-StructType schema = new StructType(new StructField [] {
-  new StructField("text", new ArrayType(DataTypes.StringType, true), false, Metadata.empty())
-});
-DataFrame df = sqlContext.createDataFrame(jrdd, schema);
-
-// fit a CountVectorizerModel from the corpus
-CountVectorizerModel cvModel = new CountVectorizer()
-  .setInputCol("text")
-  .setOutputCol("feature")
-  .setVocabSize(3)
-  .setMinDF(2) // a term must appear in more or equal to 2 documents to be included in the vocabulary
-  .fit(df);
-
-// alternatively, define CountVectorizerModel with a-priori vocabulary
-CountVectorizerModel cvm = new CountVectorizerModel(new String[]{"a", "b", "c"})
-  .setInputCol("text")
-  .setOutputCol("feature");
-
-cvModel.transform(df).show();
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java %}
 </div>
 </div>
 
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java
new file mode 100644
index 000000000000..ac33adb65292
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaCountVectorizerExample.java
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+// $example on$
+import java.util.Arrays;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.feature.CountVectorizer;
+import org.apache.spark.ml.feature.CountVectorizerModel;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.RowFactory;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.types.*;
+// $example off$
+
+public class JavaCountVectorizerExample {
+  public static void main(String[] args) {
+
+    SparkConf conf = new SparkConf().setAppName("JavaCountVectorizerExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Input data: Each row is a bag of words from a sentence or document.
+    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+      RowFactory.create(Arrays.asList("a", "b", "c")),
+      RowFactory.create(Arrays.asList("a", "b", "b", "c", "a"))
+    ));
+    StructType schema = new StructType(new StructField [] {
+      new StructField("text", new ArrayType(DataTypes.StringType, true), false, Metadata.empty())
+    });
+    DataFrame df = sqlContext.createDataFrame(jrdd, schema);
+
+    // fit a CountVectorizerModel from the corpus
+    CountVectorizerModel cvModel = new CountVectorizer()
+      .setInputCol("text")
+      .setOutputCol("feature")
+      .setVocabSize(3)
+      .setMinDF(2)
+      .fit(df);
+
+    // alternatively, define CountVectorizerModel with a-priori vocabulary
+    CountVectorizerModel cvm = new CountVectorizerModel(new String[]{"a", "b", "c"})
+      .setInputCol("text")
+      .setOutputCol("feature");
+
+    cvModel.transform(df).show();
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaTfIdfExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaTfIdfExample.java
new file mode 100644
index 000000000000..a41a5ec9bff0
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaTfIdfExample.java
@@ -0,0 +1,79 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+// $example on$
+import java.util.Arrays;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.feature.HashingTF;
+import org.apache.spark.ml.feature.IDF;
+import org.apache.spark.ml.feature.IDFModel;
+import org.apache.spark.ml.feature.Tokenizer;
+import org.apache.spark.mllib.linalg.Vector;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.RowFactory;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.types.DataTypes;
+import org.apache.spark.sql.types.Metadata;
+import org.apache.spark.sql.types.StructField;
+import org.apache.spark.sql.types.StructType;
+// $example off$
+
+public class JavaTfIdfExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaTfIdfExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+      RowFactory.create(0, "Hi I heard about Spark"),
+      RowFactory.create(0, "I wish Java could use case classes"),
+      RowFactory.create(1, "Logistic regression models are neat")
+    ));
+    StructType schema = new StructType(new StructField[]{
+      new StructField("label", DataTypes.DoubleType, false, Metadata.empty()),
+      new StructField("sentence", DataTypes.StringType, false, Metadata.empty())
+    });
+    DataFrame sentenceData = sqlContext.createDataFrame(jrdd, schema);
+    Tokenizer tokenizer = new Tokenizer().setInputCol("sentence").setOutputCol("words");
+    DataFrame wordsData = tokenizer.transform(sentenceData);
+    int numFeatures = 20;
+    HashingTF hashingTF = new HashingTF()
+      .setInputCol("words")
+      .setOutputCol("rawFeatures")
+      .setNumFeatures(numFeatures);
+    DataFrame featurizedData = hashingTF.transform(wordsData);
+    IDF idf = new IDF().setInputCol("rawFeatures").setOutputCol("features");
+    IDFModel idfModel = idf.fit(featurizedData);
+    DataFrame rescaledData = idfModel.transform(featurizedData);
+    for (Row r : rescaledData.select("features", "label").take(3)) {
+      Vector features = r.getAs(0);
+      Double label = r.getDouble(1);
+      System.out.println(features);
+      System.out.println(label);
+    }
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaWord2VecExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaWord2VecExample.java
new file mode 100644
index 000000000000..d472375ca982
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaWord2VecExample.java
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+// $example on$
+import java.util.Arrays;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.feature.Word2Vec;
+import org.apache.spark.ml.feature.Word2VecModel;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.RowFactory;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.types.*;
+// $example off$
+
+public class JavaWord2VecExample {
+  public static void main(String[] args) {
+
+    SparkConf conf = new SparkConf().setAppName("JavaWord2VecExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Input data: Each row is a bag of words from a sentence or document.
+    JavaRDD<Row> jrdd = jsc.parallelize(Arrays.asList(
+      RowFactory.create(Arrays.asList("Hi I heard about Spark".split(" "))),
+      RowFactory.create(Arrays.asList("I wish Java could use case classes".split(" "))),
+      RowFactory.create(Arrays.asList("Logistic regression models are neat".split(" ")))
+    ));
+    StructType schema = new StructType(new StructField[]{
+      new StructField("text", new ArrayType(DataTypes.StringType, true), false, Metadata.empty())
+    });
+    DataFrame documentDF = sqlContext.createDataFrame(jrdd, schema);
+
+    // Learn a mapping from words to Vectors.
+    Word2Vec word2Vec = new Word2Vec()
+      .setInputCol("text")
+      .setOutputCol("result")
+      .setVectorSize(3)
+      .setMinCount(0);
+    Word2VecModel model = word2Vec.fit(documentDF);
+    DataFrame result = model.transform(documentDF);
+    for (Row r : result.select("result").take(3)) {
+      System.out.println(r);
+    }
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/ml/tf_idf_example.py b/examples/src/main/python/ml/tf_idf_example.py
new file mode 100644
index 000000000000..c92313378eec
--- /dev/null
+++ b/examples/src/main/python/ml/tf_idf_example.py
@@ -0,0 +1,47 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.ml.feature import HashingTF, IDF, Tokenizer
+# $example off$
+from pyspark.sql import SQLContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="TfIdfExample")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    sentenceData = sqlContext.createDataFrame([
+        (0, "Hi I heard about Spark"),
+        (0, "I wish Java could use case classes"),
+        (1, "Logistic regression models are neat")
+    ], ["label", "sentence"])
+    tokenizer = Tokenizer(inputCol="sentence", outputCol="words")
+    wordsData = tokenizer.transform(sentenceData)
+    hashingTF = HashingTF(inputCol="words", outputCol="rawFeatures", numFeatures=20)
+    featurizedData = hashingTF.transform(wordsData)
+    idf = IDF(inputCol="rawFeatures", outputCol="features")
+    idfModel = idf.fit(featurizedData)
+    rescaledData = idfModel.transform(featurizedData)
+    for features_label in rescaledData.select("features", "label").take(3):
+        print(features_label)
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/python/ml/word2vec_example.py b/examples/src/main/python/ml/word2vec_example.py
new file mode 100644
index 000000000000..53c77feb1014
--- /dev/null
+++ b/examples/src/main/python/ml/word2vec_example.py
@@ -0,0 +1,45 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+from pyspark.sql import SQLContext
+# $example on$
+from pyspark.ml.feature import Word2Vec
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="Word2VecExample")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Input data: Each row is a bag of words from a sentence or document.
+    documentDF = sqlContext.createDataFrame([
+        ("Hi I heard about Spark".split(" "), ),
+        ("I wish Java could use case classes".split(" "), ),
+        ("Logistic regression models are neat".split(" "), )
+    ], ["text"])
+    # Learn a mapping from words to Vectors.
+    word2Vec = Word2Vec(vectorSize=3, minCount=0, inputCol="text", outputCol="result")
+    model = word2Vec.fit(documentDF)
+    result = model.transform(documentDF)
+    for feature in result.select("result").take(3):
+        print(feature)
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/CountVectorizerExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/CountVectorizerExample.scala
new file mode 100644
index 000000000000..ba916f66c4c0
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/CountVectorizerExample.scala
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.feature.{CountVectorizer, CountVectorizerModel}
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+
+object CountVectorizerExample {
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("CounterVectorizerExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    val df = sqlContext.createDataFrame(Seq(
+      (0, Array("a", "b", "c")),
+      (1, Array("a", "b", "b", "c", "a"))
+    )).toDF("id", "words")
+
+    // fit a CountVectorizerModel from the corpus
+    val cvModel: CountVectorizerModel = new CountVectorizer()
+      .setInputCol("words")
+      .setOutputCol("features")
+      .setVocabSize(3)
+      .setMinDF(2)
+      .fit(df)
+
+    // alternatively, define CountVectorizerModel with a-priori vocabulary
+    val cvm = new CountVectorizerModel(Array("a", "b", "c"))
+      .setInputCol("words")
+      .setOutputCol("features")
+
+    cvModel.transform(df).select("features").show()
+    // $example off$
+  }
+}
+// scalastyle:on println
+
+
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/TfIdfExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/TfIdfExample.scala
new file mode 100644
index 000000000000..40c33e4e7d44
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/TfIdfExample.scala
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.feature.{HashingTF, IDF, Tokenizer}
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+object TfIdfExample {
+
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("TfIdfExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    val sentenceData = sqlContext.createDataFrame(Seq(
+      (0, "Hi I heard about Spark"),
+      (0, "I wish Java could use case classes"),
+      (1, "Logistic regression models are neat")
+    )).toDF("label", "sentence")
+
+    val tokenizer = new Tokenizer().setInputCol("sentence").setOutputCol("words")
+    val wordsData = tokenizer.transform(sentenceData)
+    val hashingTF = new HashingTF()
+      .setInputCol("words").setOutputCol("rawFeatures").setNumFeatures(20)
+    val featurizedData = hashingTF.transform(wordsData)
+    val idf = new IDF().setInputCol("rawFeatures").setOutputCol("features")
+    val idfModel = idf.fit(featurizedData)
+    val rescaledData = idfModel.transform(featurizedData)
+    rescaledData.select("features", "label").take(3).foreach(println)
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/Word2VecExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/Word2VecExample.scala
new file mode 100644
index 000000000000..631ab4c8efa0
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/Word2VecExample.scala
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.feature.Word2Vec
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+object Word2VecExample {
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("Word2Vec example")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Input data: Each row is a bag of words from a sentence or document.
+    val documentDF = sqlContext.createDataFrame(Seq(
+      "Hi I heard about Spark".split(" "),
+      "I wish Java could use case classes".split(" "),
+      "Logistic regression models are neat".split(" ")
+    ).map(Tuple1.apply)).toDF("text")
+
+    // Learn a mapping from words to Vectors.
+    val word2Vec = new Word2Vec()
+      .setInputCol("text")
+      .setOutputCol("result")
+      .setVectorSize(3)
+      .setMinCount(0)
+    val model = word2Vec.fit(documentDF)
+    val result = model.transform(documentDF)
+    result.select("result").take(3).foreach(println)
+    // $example off$
+  }
+}
+// scalastyle:on println

From 5d4f6abec4e371093e01c084656173e9cfabf29b Mon Sep 17 00:00:00 2001
From: noelsmith <mail@noelsmith.com>
Date: Mon, 26 Oct 2015 21:28:18 -0700
Subject: [PATCH 371/896] [SPARK-10271][PYSPARK][MLLIB] Added @since tags to
 pyspark.mllib.clustering

Duplicated the since decorator from pyspark.sql into pyspark (also tweaked to handle functions without docstrings).

Added since to methods + "versionadded::" to classes (derived from the git file history in pyspark).

Author: noelsmith <mail@noelsmith.com>

Closes #8627 from noel-smith/SPARK-10271-since-mllib-clustering.
---
 python/pyspark/mllib/clustering.py | 69 +++++++++++++++++++++++++++++-
 1 file changed, 68 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index 6964a45db249..c451df17cf26 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -28,7 +28,7 @@
 
 from collections import namedtuple
 
-from pyspark import SparkContext
+from pyspark import SparkContext, since
 from pyspark.rdd import RDD, ignore_unicode_prefix
 from pyspark.mllib.common import JavaModelWrapper, callMLlibFunc, callJavaFunc, _py2java, _java2py
 from pyspark.mllib.linalg import SparseVector, _convert_to_vector, DenseVector
@@ -96,21 +96,26 @@ class KMeansModel(Saveable, Loader):
     ...     initialModel = KMeansModel([(-1000.0,-1000.0),(5.0,5.0),(1000.0,1000.0)]))
     >>> model.clusterCenters
     [array([-1000., -1000.]), array([ 5.,  5.]), array([ 1000.,  1000.])]
+
+    .. versionadded:: 0.9.0
     """
 
     def __init__(self, centers):
         self.centers = centers
 
     @property
+    @since('1.0.0')
     def clusterCenters(self):
         """Get the cluster centers, represented as a list of NumPy arrays."""
         return self.centers
 
     @property
+    @since('1.4.0')
     def k(self):
         """Total number of clusters."""
         return len(self.centers)
 
+    @since('0.9.0')
     def predict(self, x):
         """Find the cluster to which x belongs in this model."""
         best = 0
@@ -126,6 +131,7 @@ def predict(self, x):
                 best_distance = distance
         return best
 
+    @since('1.4.0')
     def computeCost(self, rdd):
         """
         Return the K-means cost (sum of squared distances of points to
@@ -135,20 +141,32 @@ def computeCost(self, rdd):
                              [_convert_to_vector(c) for c in self.centers])
         return cost
 
+    @since('1.4.0')
     def save(self, sc, path):
+        """
+        Save this model to the given path.
+        """
         java_centers = _py2java(sc, [_convert_to_vector(c) for c in self.centers])
         java_model = sc._jvm.org.apache.spark.mllib.clustering.KMeansModel(java_centers)
         java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since('1.4.0')
     def load(cls, sc, path):
+        """
+        Load a model from the given path.
+        """
         java_model = sc._jvm.org.apache.spark.mllib.clustering.KMeansModel.load(sc._jsc.sc(), path)
         return KMeansModel(_java2py(sc, java_model.clusterCenters()))
 
 
 class KMeans(object):
+    """
+    .. versionadded:: 0.9.0
+    """
 
     @classmethod
+    @since('0.9.0')
     def train(cls, rdd, k, maxIterations=100, runs=1, initializationMode="k-means||",
               seed=None, initializationSteps=5, epsilon=1e-4, initialModel=None):
         """Train a k-means clustering model."""
@@ -222,9 +240,12 @@ class GaussianMixtureModel(JavaModelWrapper, JavaSaveable, JavaLoader):
     True
     >>> labels[3]==labels[4]
     True
+
+    .. versionadded:: 1.3.0
     """
 
     @property
+    @since('1.4.0')
     def weights(self):
         """
         Weights for each Gaussian distribution in the mixture, where weights[i] is
@@ -233,6 +254,7 @@ def weights(self):
         return array(self.call("weights"))
 
     @property
+    @since('1.4.0')
     def gaussians(self):
         """
         Array of MultivariateGaussian where gaussians[i] represents
@@ -243,10 +265,12 @@ def gaussians(self):
             for gaussian in zip(*self.call("gaussians"))]
 
     @property
+    @since('1.4.0')
     def k(self):
         """Number of gaussians in mixture."""
         return len(self.weights)
 
+    @since('1.3.0')
     def predict(self, x):
         """
         Find the cluster to which the points in 'x' has maximum membership
@@ -262,6 +286,7 @@ def predict(self, x):
             raise TypeError("x should be represented by an RDD, "
                             "but got %s." % type(x))
 
+    @since('1.3.0')
     def predictSoft(self, x):
         """
         Find the membership of each point in 'x' to all mixture components.
@@ -279,6 +304,7 @@ def predictSoft(self, x):
                             "but got %s." % type(x))
 
     @classmethod
+    @since('1.5.0')
     def load(cls, sc, path):
         """Load the GaussianMixtureModel from disk.
 
@@ -302,8 +328,11 @@ class GaussianMixture(object):
     :param maxIterations:   Number of iterations. Default to 100
     :param seed:            Random Seed
     :param initialModel:    GaussianMixtureModel for initializing learning
+
+    .. versionadded:: 1.3.0
     """
     @classmethod
+    @since('1.3.0')
     def train(cls, rdd, k, convergenceTol=1e-3, maxIterations=100, seed=None, initialModel=None):
         """Train a Gaussian Mixture clustering model."""
         initialModelWeights = None
@@ -358,15 +387,19 @@ class PowerIterationClusteringModel(JavaModelWrapper, JavaSaveable, JavaLoader):
     ...     rmtree(path)
     ... except OSError:
     ...     pass
+
+    .. versionadded:: 1.5.0
     """
 
     @property
+    @since('1.5.0')
     def k(self):
         """
         Returns the number of clusters.
         """
         return self.call("k")
 
+    @since('1.5.0')
     def assignments(self):
         """
         Returns the cluster assignments of this model.
@@ -375,7 +408,11 @@ def assignments(self):
             lambda x: (PowerIterationClustering.Assignment(*x)))
 
     @classmethod
+    @since('1.5.0')
     def load(cls, sc, path):
+        """
+        Load a model from the given path.
+        """
         model = cls._load_java(sc, path)
         wrapper = sc._jvm.PowerIterationClusteringModelWrapper(model)
         return PowerIterationClusteringModel(wrapper)
@@ -390,9 +427,12 @@ class PowerIterationClustering(object):
     From the abstract: PIC finds a very low-dimensional embedding of a
     dataset using truncated power iteration on a normalized pair-wise
     similarity matrix of the data.
+
+    .. versionadded:: 1.5.0
     """
 
     @classmethod
+    @since('1.5.0')
     def train(cls, rdd, k, maxIterations=100, initMode="random"):
         """
         :param rdd: an RDD of (i, j, s,,ij,,) tuples representing the
@@ -415,6 +455,8 @@ def train(cls, rdd, k, maxIterations=100, initMode="random"):
     class Assignment(namedtuple("Assignment", ["id", "cluster"])):
         """
         Represents an (id, cluster) tuple.
+
+        .. versionadded:: 1.5.0
         """
 
 
@@ -474,17 +516,21 @@ class StreamingKMeansModel(KMeansModel):
     0
     >>> stkm.predict([1.5, 1.5])
     1
+
+    .. versionadded:: 1.5.0
     """
     def __init__(self, clusterCenters, clusterWeights):
         super(StreamingKMeansModel, self).__init__(centers=clusterCenters)
         self._clusterWeights = list(clusterWeights)
 
     @property
+    @since('1.5.0')
     def clusterWeights(self):
         """Return the cluster weights."""
         return self._clusterWeights
 
     @ignore_unicode_prefix
+    @since('1.5.0')
     def update(self, data, decayFactor, timeUnit):
         """Update the centroids, according to data
 
@@ -523,6 +569,8 @@ class StreamingKMeans(object):
     :param decayFactor: float, forgetfulness of the previous centroids.
     :param timeUnit: can be "batches" or "points". If points, then the
                      decayfactor is raised to the power of no. of new points.
+
+    .. versionadded:: 1.5.0
     """
     def __init__(self, k=2, decayFactor=1.0, timeUnit="batches"):
         self._k = k
@@ -533,6 +581,7 @@ def __init__(self, k=2, decayFactor=1.0, timeUnit="batches"):
         self._timeUnit = timeUnit
         self._model = None
 
+    @since('1.5.0')
     def latestModel(self):
         """Return the latest model"""
         return self._model
@@ -547,16 +596,19 @@ def _validate(self, dstream):
                 "Expected dstream to be of type DStream, "
                 "got type %s" % type(dstream))
 
+    @since('1.5.0')
     def setK(self, k):
         """Set number of clusters."""
         self._k = k
         return self
 
+    @since('1.5.0')
     def setDecayFactor(self, decayFactor):
         """Set decay factor."""
         self._decayFactor = decayFactor
         return self
 
+    @since('1.5.0')
     def setHalfLife(self, halfLife, timeUnit):
         """
         Set number of batches after which the centroids of that
@@ -566,6 +618,7 @@ def setHalfLife(self, halfLife, timeUnit):
         self._decayFactor = exp(log(0.5) / halfLife)
         return self
 
+    @since('1.5.0')
     def setInitialCenters(self, centers, weights):
         """
         Set initial centers. Should be set before calling trainOn.
@@ -573,6 +626,7 @@ def setInitialCenters(self, centers, weights):
         self._model = StreamingKMeansModel(centers, weights)
         return self
 
+    @since('1.5.0')
     def setRandomCenters(self, dim, weight, seed):
         """
         Set the initial centres to be random samples from
@@ -584,6 +638,7 @@ def setRandomCenters(self, dim, weight, seed):
         self._model = StreamingKMeansModel(clusterCenters, clusterWeights)
         return self
 
+    @since('1.5.0')
     def trainOn(self, dstream):
         """Train the model on the incoming dstream."""
         self._validate(dstream)
@@ -593,6 +648,7 @@ def update(rdd):
 
         dstream.foreachRDD(update)
 
+    @since('1.5.0')
     def predictOn(self, dstream):
         """
         Make predictions on a dstream.
@@ -601,6 +657,7 @@ def predictOn(self, dstream):
         self._validate(dstream)
         return dstream.map(lambda x: self._model.predict(x))
 
+    @since('1.5.0')
     def predictOnValues(self, dstream):
         """
         Make predictions on a keyed dstream.
@@ -649,16 +706,21 @@ class LDAModel(JavaModelWrapper):
     ...     rmtree(path)
     ... except OSError:
     ...     pass
+
+    .. versionadded:: 1.5.0
     """
 
+    @since('1.5.0')
     def topicsMatrix(self):
         """Inferred topics, where each topic is represented by a distribution over terms."""
         return self.call("topicsMatrix").toArray()
 
+    @since('1.5.0')
     def vocabSize(self):
         """Vocabulary size (number of terms or terms in the vocabulary)"""
         return self.call("vocabSize")
 
+    @since('1.5.0')
     def save(self, sc, path):
         """Save the LDAModel on to disk.
 
@@ -672,6 +734,7 @@ def save(self, sc, path):
         self._java_model.save(sc._jsc.sc(), path)
 
     @classmethod
+    @since('1.5.0')
     def load(cls, sc, path):
         """Load the LDAModel from disk.
 
@@ -688,8 +751,12 @@ def load(cls, sc, path):
 
 
 class LDA(object):
+    """
+    .. versionadded:: 1.5.0
+    """
 
     @classmethod
+    @since('1.5.0')
     def train(cls, rdd, k=10, maxIterations=20, docConcentration=-1.0,
               topicConcentration=-1.0, seed=None, checkpointInterval=10, optimizer="em"):
         """Train a LDA model.

From 3cac6614a4fe60b1446bf704d0a35787d385fb86 Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Mon, 26 Oct 2015 21:47:42 -0700
Subject: [PATCH 372/896] [SPARK-11184][MLLIB] Declare most of .mllib code
 not-Experimental

Remove "Experimental" from .mllib code that has been around since 1.4.0 or earlier

Author: Sean Owen <sowen@cloudera.com>

Closes #9169 from srowen/SPARK-11184.
---
 .../mllib/classification/ClassificationModel.scala |  4 +---
 .../mllib/classification/LogisticRegression.scala  | 10 +---------
 .../apache/spark/mllib/classification/SVM.scala    |  8 +-------
 .../StreamingLogisticRegressionWithSGD.scala       |  4 +---
 .../spark/mllib/clustering/GaussianMixture.scala   |  5 +----
 .../mllib/clustering/GaussianMixtureModel.scala    |  6 +-----
 .../org/apache/spark/mllib/clustering/LDA.scala    |  5 +----
 .../apache/spark/mllib/clustering/LDAModel.scala   |  9 ---------
 .../clustering/PowerIterationClustering.scala      | 11 +----------
 .../spark/mllib/clustering/StreamingKMeans.scala   |  8 +-------
 .../evaluation/BinaryClassificationMetrics.scala   |  5 +----
 .../spark/mllib/evaluation/MulticlassMetrics.scala |  4 +---
 .../spark/mllib/evaluation/RankingMetrics.scala    |  4 +---
 .../spark/mllib/evaluation/RegressionMetrics.scala |  4 +---
 .../apache/spark/mllib/feature/ChiSqSelector.scala |  6 +-----
 .../spark/mllib/feature/ElementwiseProduct.scala   |  4 +---
 .../org/apache/spark/mllib/feature/HashingTF.scala |  4 +---
 .../scala/org/apache/spark/mllib/feature/IDF.scala |  6 +-----
 .../apache/spark/mllib/feature/Normalizer.scala    |  4 +---
 .../spark/mllib/feature/StandardScaler.scala       |  6 +-----
 .../org/apache/spark/mllib/feature/Word2Vec.scala  | 12 +++---------
 .../org/apache/spark/mllib/fpm/FPGrowth.scala      | 14 +-------------
 .../mllib/linalg/SingularValueDecomposition.scala  |  2 --
 .../mllib/linalg/distributed/BlockMatrix.scala     |  5 +----
 .../linalg/distributed/CoordinateMatrix.scala      |  6 +-----
 .../linalg/distributed/IndexedRowMatrix.scala      |  6 +-----
 .../spark/mllib/linalg/distributed/RowMatrix.scala |  6 +-----
 .../org/apache/spark/mllib/random/RandomRDDs.scala |  4 +---
 .../mllib/regression/IsotonicRegression.scala      |  8 +-------
 .../spark/mllib/regression/RegressionModel.scala   |  3 +--
 .../StreamingLinearRegressionWithSGD.scala         |  4 +---
 .../apache/spark/mllib/stat/KernelDensity.scala    |  4 +---
 .../org/apache/spark/mllib/stat/Statistics.scala   |  4 +---
 .../apache/spark/mllib/stat/test/TestResult.scala  |  4 ----
 .../org/apache/spark/mllib/tree/DecisionTree.scala |  4 +---
 .../spark/mllib/tree/GradientBoostedTrees.scala    |  4 +---
 .../org/apache/spark/mllib/tree/RandomForest.scala |  4 +---
 .../tree/configuration/BoostingStrategy.scala      |  5 +----
 .../mllib/tree/configuration/FeatureType.scala     |  4 +---
 .../tree/configuration/QuantileStrategy.scala      |  4 +---
 .../spark/mllib/tree/configuration/Strategy.scala  |  5 +----
 .../apache/spark/mllib/tree/impl/TimeTracker.scala |  3 ---
 .../spark/mllib/tree/model/DecisionTreeModel.scala |  4 +---
 .../mllib/tree/model/treeEnsembleModels.scala      |  7 +------
 .../org/apache/spark/mllib/util/MLUtils.scala      |  8 +-------
 45 files changed, 43 insertions(+), 208 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/ClassificationModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/ClassificationModel.scala
index 85a413243b04..5161bc72659c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/ClassificationModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/ClassificationModel.scala
@@ -19,17 +19,15 @@ package org.apache.spark.mllib.classification
 
 import org.json4s.{DefaultFormats, JValue}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.rdd.RDD
 
 /**
- * :: Experimental ::
  * Represents a classification model that predicts to which of a set of categories an example
  * belongs. The categories are represented by double values: 0.0, 1.0, 2.0, etc.
  */
-@Experimental
 @Since("0.8.0")
 trait ClassificationModel extends Serializable {
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
index 5ceff5b2259e..2d52abc122bf 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/LogisticRegression.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.mllib.classification
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.classification.impl.GLMClassificationModel
 import org.apache.spark.mllib.linalg.BLAS.dot
 import org.apache.spark.mllib.linalg.{DenseVector, Vector}
@@ -82,35 +82,29 @@ class LogisticRegressionModel @Since("1.3.0") (
   private var threshold: Option[Double] = Some(0.5)
 
   /**
-   * :: Experimental ::
    * Sets the threshold that separates positive predictions from negative predictions
    * in Binary Logistic Regression. An example with prediction score greater than or equal to
    * this threshold is identified as an positive, and negative otherwise. The default value is 0.5.
    * It is only used for binary classification.
    */
   @Since("1.0.0")
-  @Experimental
   def setThreshold(threshold: Double): this.type = {
     this.threshold = Some(threshold)
     this
   }
 
   /**
-   * :: Experimental ::
    * Returns the threshold (if any) used for converting raw prediction scores into 0/1 predictions.
    * It is only used for binary classification.
    */
   @Since("1.3.0")
-  @Experimental
   def getThreshold: Option[Double] = threshold
 
   /**
-   * :: Experimental ::
    * Clears the threshold so that `predict` will output raw prediction scores.
    * It is only used for binary classification.
    */
   @Since("1.0.0")
-  @Experimental
   def clearThreshold(): this.type = {
     threshold = None
     this
@@ -359,13 +353,11 @@ class LogisticRegressionWithLBFGS
   }
 
   /**
-   * :: Experimental ::
    * Set the number of possible outcomes for k classes classification problem in
    * Multinomial Logistic Regression.
    * By default, it is binary logistic regression so k will be set to 2.
    */
   @Since("1.3.0")
-  @Experimental
   def setNumClasses(numClasses: Int): this.type = {
     require(numClasses > 1)
     numOfLinearPredictor = numClasses - 1
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/SVM.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/SVM.scala
index 896565cd90e8..a8d3fd4177a2 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/SVM.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/SVM.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.mllib.classification
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.classification.impl.GLMClassificationModel
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.optimization._
@@ -43,32 +43,26 @@ class SVMModel @Since("1.1.0") (
   private var threshold: Option[Double] = Some(0.0)
 
   /**
-   * :: Experimental ::
    * Sets the threshold that separates positive predictions from negative predictions. An example
    * with prediction score greater than or equal to this threshold is identified as an positive,
    * and negative otherwise. The default value is 0.0.
    */
   @Since("1.0.0")
-  @Experimental
   def setThreshold(threshold: Double): this.type = {
     this.threshold = Some(threshold)
     this
   }
 
   /**
-   * :: Experimental ::
    * Returns the threshold (if any) used for converting raw prediction scores into 0/1 predictions.
    */
   @Since("1.3.0")
-  @Experimental
   def getThreshold: Option[Double] = threshold
 
   /**
-   * :: Experimental ::
    * Clears the threshold so that `predict` will output raw prediction scores.
    */
   @Since("1.0.0")
-  @Experimental
   def clearThreshold(): this.type = {
     threshold = None
     this
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/classification/StreamingLogisticRegressionWithSGD.scala b/mllib/src/main/scala/org/apache/spark/mllib/classification/StreamingLogisticRegressionWithSGD.scala
index 75630054d136..47bff5ebdde4 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/classification/StreamingLogisticRegressionWithSGD.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/classification/StreamingLogisticRegressionWithSGD.scala
@@ -17,12 +17,11 @@
 
 package org.apache.spark.mllib.classification
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.regression.StreamingLinearAlgorithm
 
 /**
- * :: Experimental ::
  * Train or predict a logistic regression model on streaming data. Training uses
  * Stochastic Gradient Descent to update the model based on each new batch of
  * incoming data from a DStream (see `LogisticRegressionWithSGD` for model equation)
@@ -43,7 +42,6 @@ import org.apache.spark.mllib.regression.StreamingLinearAlgorithm
  *    .trainOn(DStream)
  * }}}
  */
-@Experimental
 @Since("1.3.0")
 class StreamingLogisticRegressionWithSGD private[mllib] (
     private var stepSize: Double,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixture.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixture.scala
index f82bd82c2037..7b203e2f4081 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixture.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixture.scala
@@ -21,7 +21,7 @@ import scala.collection.mutable.IndexedSeq
 
 import breeze.linalg.{diag, DenseMatrix => BreezeMatrix, DenseVector => BDV, Vector => BV}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.{BLAS, DenseMatrix, Matrices, Vector, Vectors}
 import org.apache.spark.mllib.stat.distribution.MultivariateGaussian
@@ -30,8 +30,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.util.Utils
 
 /**
- * :: Experimental ::
- *
  * This class performs expectation maximization for multivariate Gaussian
  * Mixture Models (GMMs).  A GMM represents a composite distribution of
  * independent Gaussian distributions with associated "mixing" weights
@@ -52,7 +50,6 @@ import org.apache.spark.util.Utils
  * is considered to have occurred.
  * @param maxIterations The maximum number of iterations to perform
  */
-@Experimental
 @Since("1.3.0")
 class GaussianMixture private (
     private var k: Int,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
index a5902190d463..2115f7d99c18 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/GaussianMixtureModel.scala
@@ -24,7 +24,7 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.{Vector, Matrices, Matrix}
 import org.apache.spark.mllib.stat.distribution.MultivariateGaussian
@@ -33,8 +33,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.{SQLContext, Row}
 
 /**
- * :: Experimental ::
- *
  * Multivariate Gaussian Mixture Model (GMM) consisting of k Gaussians, where points
  * are drawn from each Gaussian i=1..k with probability w(i); mu(i) and sigma(i) are
  * the respective mean and covariance for each Gaussian distribution i=1..k.
@@ -45,7 +43,6 @@ import org.apache.spark.sql.{SQLContext, Row}
  *                  the Multivariate Gaussian (Normal) Distribution for Gaussian i
  */
 @Since("1.3.0")
-@Experimental
 class GaussianMixtureModel @Since("1.3.0") (
   @Since("1.3.0") val weights: Array[Double],
   @Since("1.3.0") val gaussians: Array[MultivariateGaussian]) extends Serializable with Saveable {
@@ -132,7 +129,6 @@ class GaussianMixtureModel @Since("1.3.0") (
 }
 
 @Since("1.4.0")
-@Experimental
 object GaussianMixtureModel extends Loader[GaussianMixtureModel] {
 
   private object SaveLoadV1_0 {
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDA.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDA.scala
index 92a321afb0ca..eb802a365ed6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDA.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDA.scala
@@ -20,7 +20,7 @@ package org.apache.spark.mllib.clustering
 import breeze.linalg.{DenseVector => BDV}
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
+import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.api.java.JavaPairRDD
 import org.apache.spark.graphx._
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
@@ -28,8 +28,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.util.Utils
 
 /**
- * :: Experimental ::
- *
  * Latent Dirichlet Allocation (LDA), a topic model designed for text documents.
  *
  * Terminology:
@@ -45,7 +43,6 @@ import org.apache.spark.util.Utils
  *       (Wikipedia)]]
  */
 @Since("1.3.0")
-@Experimental
 class LDA private (
     private var k: Int,
     private var maxIterations: Int,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
index 15129e0dd5a9..31d8a9fdea1c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
@@ -35,14 +35,11 @@ import org.apache.spark.sql.{Row, SQLContext}
 import org.apache.spark.util.BoundedPriorityQueue
 
 /**
- * :: Experimental ::
- *
  * Latent Dirichlet Allocation (LDA) model.
  *
  * This abstraction permits for different underlying representations,
  * including local and distributed data structures.
  */
-@Experimental
 @Since("1.3.0")
 abstract class LDAModel private[clustering] extends Saveable {
 
@@ -184,15 +181,12 @@ abstract class LDAModel private[clustering] extends Saveable {
 }
 
 /**
- * :: Experimental ::
- *
  * Local LDA model.
  * This model stores only the inferred topics.
  * It may be used for computing topics for new documents, but it may give less accurate answers
  * than the [[DistributedLDAModel]].
  * @param topics Inferred topics (vocabSize x k matrix).
  */
-@Experimental
 @Since("1.3.0")
 class LocalLDAModel private[clustering] (
     @Since("1.3.0") val topics: Matrix,
@@ -481,14 +475,11 @@ object LocalLDAModel extends Loader[LocalLDAModel] {
 }
 
 /**
- * :: Experimental ::
- *
  * Distributed LDA model.
  * This model stores the inferred topics, the full training dataset, and the topic distributions.
  * When computing topics for new documents, it may give more accurate answers
  * than the [[LocalLDAModel]].
  */
-@Experimental
 @Since("1.3.0")
 class DistributedLDAModel private[clustering] (
     private[clustering] val graph: Graph[LDA.TopicCounts, LDA.TokenCount],
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
index 6c76e26fd162..7cd9b08fa8e0 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/PowerIterationClustering.scala
@@ -21,7 +21,7 @@ import org.json4s.JsonDSL._
 import org.json4s._
 import org.json4s.jackson.JsonMethods._
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.graphx._
 import org.apache.spark.graphx.impl.GraphImpl
@@ -33,15 +33,12 @@ import org.apache.spark.util.random.XORShiftRandom
 import org.apache.spark.{Logging, SparkContext, SparkException}
 
 /**
- * :: Experimental ::
- *
  * Model produced by [[PowerIterationClustering]].
  *
  * @param k number of clusters
  * @param assignments an RDD of clustering [[PowerIterationClustering#Assignment]]s
  */
 @Since("1.3.0")
-@Experimental
 class PowerIterationClusteringModel @Since("1.3.0") (
     @Since("1.3.0") val k: Int,
     @Since("1.3.0") val assignments: RDD[PowerIterationClustering.Assignment])
@@ -107,8 +104,6 @@ object PowerIterationClusteringModel extends Loader[PowerIterationClusteringMode
 }
 
 /**
- * :: Experimental ::
- *
  * Power Iteration Clustering (PIC), a scalable graph clustering algorithm developed by
  * [[http://www.icml2010.org/papers/387.pdf Lin and Cohen]]. From the abstract: PIC finds a very
  * low-dimensional embedding of a dataset using truncated power iteration on a normalized pair-wise
@@ -120,7 +115,6 @@ object PowerIterationClusteringModel extends Loader[PowerIterationClusteringMode
  *
  * @see [[http://en.wikipedia.org/wiki/Spectral_clustering Spectral clustering (Wikipedia)]]
  */
-@Experimental
 @Since("1.3.0")
 class PowerIterationClustering private[clustering] (
     private var k: Int,
@@ -239,17 +233,14 @@ class PowerIterationClustering private[clustering] (
 }
 
 @Since("1.3.0")
-@Experimental
 object PowerIterationClustering extends Logging {
 
   /**
-   * :: Experimental ::
    * Cluster assignment.
    * @param id node id
    * @param cluster assigned cluster id
    */
   @Since("1.3.0")
-  @Experimental
   case class Assignment(id: Long, cluster: Int)
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
index 1d50ffec96fa..80843719f50b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/StreamingKMeans.scala
@@ -20,7 +20,7 @@ package org.apache.spark.mllib.clustering
 import scala.reflect.ClassTag
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaSparkContext._
 import org.apache.spark.mllib.linalg.{BLAS, Vector, Vectors}
 import org.apache.spark.rdd.RDD
@@ -30,8 +30,6 @@ import org.apache.spark.util.Utils
 import org.apache.spark.util.random.XORShiftRandom
 
 /**
- * :: Experimental ::
- *
  * StreamingKMeansModel extends MLlib's KMeansModel for streaming
  * algorithms, so it can keep track of a continuously updated weight
  * associated with each cluster, and also update the model by
@@ -65,7 +63,6 @@ import org.apache.spark.util.random.XORShiftRandom
  * as batches or points.
  */
 @Since("1.2.0")
-@Experimental
 class StreamingKMeansModel @Since("1.2.0") (
     @Since("1.2.0") override val clusterCenters: Array[Vector],
     @Since("1.2.0") val clusterWeights: Array[Double])
@@ -149,8 +146,6 @@ class StreamingKMeansModel @Since("1.2.0") (
 }
 
 /**
- * :: Experimental ::
- *
  * StreamingKMeans provides methods for configuring a
  * streaming k-means analysis, training the model on streaming,
  * and using the model to make predictions on streaming data.
@@ -168,7 +163,6 @@ class StreamingKMeansModel @Since("1.2.0") (
  * }}}
  */
 @Since("1.2.0")
-@Experimental
 class StreamingKMeans @Since("1.2.0") (
     @Since("1.2.0") var k: Int,
     @Since("1.2.0") var decayFactor: Double,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/BinaryClassificationMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/BinaryClassificationMetrics.scala
index 508fe532b130..12cf22095720 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/BinaryClassificationMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/BinaryClassificationMetrics.scala
@@ -17,15 +17,13 @@
 
 package org.apache.spark.mllib.evaluation
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.Logging
-import org.apache.spark.SparkContext._
 import org.apache.spark.mllib.evaluation.binary._
 import org.apache.spark.rdd.{RDD, UnionRDD}
 import org.apache.spark.sql.DataFrame
 
 /**
- * :: Experimental ::
  * Evaluator for binary classification.
  *
  * @param scoreAndLabels an RDD of (score, label) pairs.
@@ -43,7 +41,6 @@ import org.apache.spark.sql.DataFrame
  *                partition boundaries.
  */
 @Since("1.0.0")
-@Experimental
 class BinaryClassificationMetrics @Since("1.3.0") (
     @Since("1.3.0") val scoreAndLabels: RDD[(Double, Double)],
     @Since("1.3.0") val numBins: Int) extends Logging {
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/MulticlassMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/MulticlassMetrics.scala
index 00e837661dfc..c5104960cfcb 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/MulticlassMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/MulticlassMetrics.scala
@@ -19,8 +19,7 @@ package org.apache.spark.mllib.evaluation
 
 import scala.collection.Map
 
-import org.apache.spark.SparkContext._
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.{Matrices, Matrix}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.DataFrame
@@ -32,7 +31,6 @@ import org.apache.spark.sql.DataFrame
  * @param predictionAndLabels an RDD of (prediction, label) pairs.
  */
 @Since("1.1.0")
-@Experimental
 class MulticlassMetrics @Since("1.1.0") (predictionAndLabels: RDD[(Double, Double)]) {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
index a7f43f0b110f..cc01936dd34b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RankingMetrics.scala
@@ -23,7 +23,7 @@ import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.{JavaSparkContext, JavaRDD}
 import org.apache.spark.rdd.RDD
 
@@ -36,7 +36,6 @@ import org.apache.spark.rdd.RDD
  * @param predictionAndLabels an RDD of (predicted ranking, ground truth set) pairs.
  */
 @Since("1.2.0")
-@Experimental
 class RankingMetrics[T: ClassTag](predictionAndLabels: RDD[(Array[T], Array[T])])
   extends Logging with Serializable {
 
@@ -159,7 +158,6 @@ class RankingMetrics[T: ClassTag](predictionAndLabels: RDD[(Array[T], Array[T])]
 
 }
 
-@Experimental
 object RankingMetrics {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
index 799ebb980ef0..1d8f4fe340fb 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.mllib.evaluation
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.rdd.RDD
 import org.apache.spark.Logging
 import org.apache.spark.mllib.linalg.Vectors
@@ -25,13 +25,11 @@ import org.apache.spark.mllib.stat.{MultivariateStatisticalSummary, Multivariate
 import org.apache.spark.sql.DataFrame
 
 /**
- * :: Experimental ::
  * Evaluator for regression.
  *
  * @param predictionAndObservations an RDD of (prediction, observation) pairs.
  */
 @Since("1.2.0")
-@Experimental
 class RegressionMetrics @Since("1.2.0") (
     predictionAndObservations: RDD[(Double, Double)]) extends Logging {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
index 5246faf22191..d4d022afde05 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/ChiSqSelector.scala
@@ -23,7 +23,7 @@ import org.json4s._
 import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.stat.Statistics
@@ -33,13 +33,11 @@ import org.apache.spark.SparkContext
 import org.apache.spark.sql.{SQLContext, Row}
 
 /**
- * :: Experimental ::
  * Chi Squared selector model.
  *
  * @param selectedFeatures list of indices to select (filter). Must be ordered asc
  */
 @Since("1.3.0")
-@Experimental
 class ChiSqSelectorModel @Since("1.3.0") (
   @Since("1.3.0") val selectedFeatures: Array[Int]) extends VectorTransformer with Saveable {
 
@@ -173,7 +171,6 @@ object ChiSqSelectorModel extends Loader[ChiSqSelectorModel] {
 }
 
 /**
- * :: Experimental ::
  * Creates a ChiSquared feature selector.
  * @param numTopFeatures number of features that selector will select
  *                       (ordered by statistic value descending)
@@ -181,7 +178,6 @@ object ChiSqSelectorModel extends Loader[ChiSqSelectorModel] {
  *                       select all features.
  */
 @Since("1.3.0")
-@Experimental
 class ChiSqSelector @Since("1.3.0") (
   @Since("1.3.0") val numTopFeatures: Int) extends Serializable {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/ElementwiseProduct.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/ElementwiseProduct.scala
index d0a6cf61687a..c757fc7f06c5 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/ElementwiseProduct.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/ElementwiseProduct.scala
@@ -17,18 +17,16 @@
 
 package org.apache.spark.mllib.feature
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg._
 
 /**
- * :: Experimental ::
  * Outputs the Hadamard product (i.e., the element-wise product) of each input vector with a
  * provided "weight" vector. In other words, it scales each column of the dataset by a scalar
  * multiplier.
  * @param scalingVec The values used to scale the reference vector's individual components.
  */
 @Since("1.4.0")
-@Experimental
 class ElementwiseProduct @Since("1.4.0") (
     @Since("1.4.0") val scalingVec: Vector) extends VectorTransformer {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/HashingTF.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/HashingTF.scala
index e47d524b6162..c93ed64183ad 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/HashingTF.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/HashingTF.scala
@@ -22,20 +22,18 @@ import java.lang.{Iterable => JavaIterable}
 import scala.collection.JavaConverters._
 import scala.collection.mutable
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.util.Utils
 
 /**
- * :: Experimental ::
  * Maps a sequence of terms to their term frequencies using the hashing trick.
  *
  * @param numFeatures number of features (default: 2^20^)
  */
 @Since("1.1.0")
-@Experimental
 class HashingTF(val numFeatures: Int) extends Serializable {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/IDF.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/IDF.scala
index 68078ccfa3d6..cffa9fba05c8 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/IDF.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/IDF.scala
@@ -19,13 +19,12 @@ package org.apache.spark.mllib.feature
 
 import breeze.linalg.{DenseVector => BDV}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.rdd.RDD
 
 /**
- * :: Experimental ::
  * Inverse document frequency (IDF).
  * The standard formulation is used: `idf = log((m + 1) / (d(t) + 1))`, where `m` is the total
  * number of documents and `d(t)` is the number of documents that contain term `t`.
@@ -38,7 +37,6 @@ import org.apache.spark.rdd.RDD
  *                   should appear for filtering
  */
 @Since("1.1.0")
-@Experimental
 class IDF @Since("1.2.0") (@Since("1.2.0") val minDocFreq: Int) {
 
   @Since("1.1.0")
@@ -159,10 +157,8 @@ private object IDF {
 }
 
 /**
- * :: Experimental ::
  * Represents an IDF model that can transform term frequency vectors.
  */
-@Experimental
 @Since("1.1.0")
 class IDFModel private[spark] (@Since("1.1.0") val idf: Vector) extends Serializable {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/Normalizer.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/Normalizer.scala
index 8d5a22520d6b..af0c8e1d8a9d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/Normalizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/Normalizer.scala
@@ -17,11 +17,10 @@
 
 package org.apache.spark.mllib.feature
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 
 /**
- * :: Experimental ::
  * Normalizes samples individually to unit L^p^ norm
  *
  * For any 1 &lt;= p &lt; Double.PositiveInfinity, normalizes samples using
@@ -32,7 +31,6 @@ import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors
  * @param p Normalization in L^p^ space, p = 2 by default.
  */
 @Since("1.1.0")
-@Experimental
 class Normalizer @Since("1.1.0") (p: Double) extends VectorTransformer {
 
   @Since("1.1.0")
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/StandardScaler.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/StandardScaler.scala
index f018b453bae7..6fe573c52894 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/StandardScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/StandardScaler.scala
@@ -18,13 +18,12 @@
 package org.apache.spark.mllib.feature
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
+import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.stat.MultivariateOnlineSummarizer
 import org.apache.spark.rdd.RDD
 
 /**
- * :: Experimental ::
  * Standardizes features by removing the mean and scaling to unit std using column summary
  * statistics on the samples in the training set.
  *
@@ -33,7 +32,6 @@ import org.apache.spark.rdd.RDD
  * @param withStd True by default. Scales the data to unit standard deviation.
  */
 @Since("1.1.0")
-@Experimental
 class StandardScaler @Since("1.1.0") (withMean: Boolean, withStd: Boolean) extends Logging {
 
   @Since("1.1.0")
@@ -64,7 +62,6 @@ class StandardScaler @Since("1.1.0") (withMean: Boolean, withStd: Boolean) exten
 }
 
 /**
- * :: Experimental ::
  * Represents a StandardScaler model that can transform vectors.
  *
  * @param std column standard deviation values
@@ -73,7 +70,6 @@ class StandardScaler @Since("1.1.0") (withMean: Boolean, withStd: Boolean) exten
  * @param withMean whether to center the data before scaling
  */
 @Since("1.1.0")
-@Experimental
 class StandardScalerModel @Since("1.3.0") (
     @Since("1.3.0") val std: Vector,
     @Since("1.1.0") val mean: Vector,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
index 58857c338f54..f3e4d346e358 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
@@ -31,15 +31,14 @@ import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.Logging
 import org.apache.spark.SparkContext
-import org.apache.spark.SparkContext._
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
-import org.apache.spark.mllib.linalg.{Vector, Vectors, DenseMatrix, BLAS, DenseVector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.{Loader, Saveable}
 import org.apache.spark.rdd._
 import org.apache.spark.util.Utils
 import org.apache.spark.util.random.XORShiftRandom
-import org.apache.spark.sql.{SQLContext, Row}
+import org.apache.spark.sql.SQLContext
 
 /**
  *  Entry in vocabulary
@@ -53,7 +52,6 @@ private case class VocabWord(
 )
 
 /**
- * :: Experimental ::
  * Word2Vec creates vector representation of words in a text corpus.
  * The algorithm first constructs a vocabulary from the corpus
  * and then learns vector representation of words in the vocabulary.
@@ -71,7 +69,6 @@ private case class VocabWord(
  * Distributed Representations of Words and Phrases and their Compositionality.
  */
 @Since("1.1.0")
-@Experimental
 class Word2Vec extends Serializable with Logging {
 
   private var vectorSize = 100
@@ -427,7 +424,6 @@ class Word2Vec extends Serializable with Logging {
 }
 
 /**
- * :: Experimental ::
  * Word2Vec model
  * @param wordIndex maps each word to an index, which can retrieve the corresponding
  *                  vector from wordVectors
@@ -435,7 +431,6 @@ class Word2Vec extends Serializable with Logging {
  *                    to the word mapped with index i can be retrieved by the slice
  *                    (i * vectorSize, i * vectorSize + vectorSize)
  */
-@Experimental
 @Since("1.1.0")
 class Word2VecModel private[mllib] (
     private val wordIndex: Map[String, Int],
@@ -558,7 +553,6 @@ class Word2VecModel private[mllib] (
 }
 
 @Since("1.4.0")
-@Experimental
 object Word2VecModel extends Loader[Word2VecModel] {
 
   private def buildWordIndex(model: Map[String, Array[Float]]): Map[String, Int] = {
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/fpm/FPGrowth.scala b/mllib/src/main/scala/org/apache/spark/mllib/fpm/FPGrowth.scala
index aea5c4f8a8a7..70ef1ed30c71 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/fpm/FPGrowth.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/fpm/FPGrowth.scala
@@ -25,7 +25,7 @@ import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 
 import org.apache.spark.{HashPartitioner, Logging, Partitioner, SparkException}
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.mllib.fpm.FPGrowth._
@@ -33,15 +33,11 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.StorageLevel
 
 /**
- * :: Experimental ::
- *
  * Model trained by [[FPGrowth]], which holds frequent itemsets.
  * @param freqItemsets frequent itemset, which is an RDD of [[FreqItemset]]
  * @tparam Item item type
- *
  */
 @Since("1.3.0")
-@Experimental
 class FPGrowthModel[Item: ClassTag] @Since("1.3.0") (
     @Since("1.3.0") val freqItemsets: RDD[FreqItemset[Item]]) extends Serializable {
   /**
@@ -56,8 +52,6 @@ class FPGrowthModel[Item: ClassTag] @Since("1.3.0") (
 }
 
 /**
- * :: Experimental ::
- *
  * A parallel FP-growth algorithm to mine frequent itemsets. The algorithm is described in
  * [[http://dx.doi.org/10.1145/1454008.1454027 Li et al., PFP: Parallel FP-Growth for Query
  *  Recommendation]]. PFP distributes computation in such a way that each worker executes an
@@ -74,7 +68,6 @@ class FPGrowthModel[Item: ClassTag] @Since("1.3.0") (
  *
  */
 @Since("1.3.0")
-@Experimental
 class FPGrowth private (
     private var minSupport: Double,
     private var numPartitions: Int) extends Logging with Serializable {
@@ -213,12 +206,7 @@ class FPGrowth private (
   }
 }
 
-/**
- * :: Experimental ::
- *
- */
 @Since("1.3.0")
-@Experimental
 object FPGrowth {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/SingularValueDecomposition.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/SingularValueDecomposition.scala
index 4dcf8f28f202..4591cb88ef15 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/SingularValueDecomposition.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/SingularValueDecomposition.scala
@@ -20,11 +20,9 @@ package org.apache.spark.mllib.linalg
 import org.apache.spark.annotation.{Experimental, Since}
 
 /**
- * :: Experimental ::
  * Represents singular value decomposition (SVD) factors.
  */
 @Since("1.0.0")
-@Experimental
 case class SingularValueDecomposition[UType, VType](U: UType, s: Vector, V: VType)
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
index 81a6c0550bda..09527dcf5d9e 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/BlockMatrix.scala
@@ -22,7 +22,7 @@ import scala.collection.mutable.ArrayBuffer
 import breeze.linalg.{DenseMatrix => BDM}
 
 import org.apache.spark.{Logging, Partitioner, SparkException}
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.{DenseMatrix, Matrices, Matrix, SparseMatrix}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.StorageLevel
@@ -115,8 +115,6 @@ private[mllib] object GridPartitioner {
 }
 
 /**
- * :: Experimental ::
- *
  * Represents a distributed matrix in blocks of local matrices.
  *
  * @param blocks The RDD of sub-matrix blocks ((blockRowIndex, blockColIndex), sub-matrix) that
@@ -132,7 +130,6 @@ private[mllib] object GridPartitioner {
  *              zero, the number of columns will be calculated when `numCols` is invoked.
  */
 @Since("1.3.0")
-@Experimental
 class BlockMatrix @Since("1.3.0") (
     @Since("1.3.0") val blocks: RDD[((Int, Int), Matrix)],
     @Since("1.3.0") val rowsPerBlock: Int,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
index 644f293d88a7..8a70f34e70f6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/CoordinateMatrix.scala
@@ -19,23 +19,20 @@ package org.apache.spark.mllib.linalg.distributed
 
 import breeze.linalg.{DenseMatrix => BDM}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.rdd.RDD
 import org.apache.spark.mllib.linalg.{Matrix, SparseMatrix, Vectors}
 
 /**
- * :: Experimental ::
  * Represents an entry in an distributed matrix.
  * @param i row index
  * @param j column index
  * @param value value of the entry
  */
 @Since("1.0.0")
-@Experimental
 case class MatrixEntry(i: Long, j: Long, value: Double)
 
 /**
- * :: Experimental ::
  * Represents a matrix in coordinate format.
  *
  * @param entries matrix entries
@@ -45,7 +42,6 @@ case class MatrixEntry(i: Long, j: Long, value: Double)
  *              columns will be determined by the max column index plus one.
  */
 @Since("1.0.0")
-@Experimental
 class CoordinateMatrix @Since("1.0.0") (
     @Since("1.0.0") val entries: RDD[MatrixEntry],
     private var nRows: Long,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
index b20ea0dc50da..e6af0c0ec7ec 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
@@ -19,21 +19,18 @@ package org.apache.spark.mllib.linalg.distributed
 
 import breeze.linalg.{DenseMatrix => BDM}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.rdd.RDD
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.linalg.SingularValueDecomposition
 
 /**
- * :: Experimental ::
  * Represents a row of [[org.apache.spark.mllib.linalg.distributed.IndexedRowMatrix]].
  */
 @Since("1.0.0")
-@Experimental
 case class IndexedRow(index: Long, vector: Vector)
 
 /**
- * :: Experimental ::
  * Represents a row-oriented [[org.apache.spark.mllib.linalg.distributed.DistributedMatrix]] with
  * indexed rows.
  *
@@ -44,7 +41,6 @@ case class IndexedRow(index: Long, vector: Vector)
  *              columns will be determined by the size of the first row.
  */
 @Since("1.0.0")
-@Experimental
 class IndexedRowMatrix @Since("1.0.0") (
     @Since("1.0.0") val rows: RDD[IndexedRow],
     private var nRows: Long,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
index b8a7adceb15b..52c0f19c645d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
@@ -26,8 +26,7 @@ import breeze.linalg.{DenseMatrix => BDM, DenseVector => BDV, SparseVector => BS
 import breeze.numerics.{sqrt => brzSqrt}
 
 import org.apache.spark.Logging
-import org.apache.spark.SparkContext._
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.stat.{MultivariateOnlineSummarizer, MultivariateStatisticalSummary}
 import org.apache.spark.rdd.RDD
@@ -35,7 +34,6 @@ import org.apache.spark.util.random.XORShiftRandom
 import org.apache.spark.storage.StorageLevel
 
 /**
- * :: Experimental ::
  * Represents a row-oriented distributed Matrix with no meaningful row indices.
  *
  * @param rows rows stored as an RDD[Vector]
@@ -45,7 +43,6 @@ import org.apache.spark.storage.StorageLevel
  *              columns will be determined by the size of the first row.
  */
 @Since("1.0.0")
-@Experimental
 class RowMatrix @Since("1.0.0") (
     @Since("1.0.0") val rows: RDD[Vector],
     private var nRows: Long,
@@ -676,7 +673,6 @@ class RowMatrix @Since("1.0.0") (
 }
 
 @Since("1.0.0")
-@Experimental
 object RowMatrix {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
index 41d7c4d355f6..b0a716936ae6 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/random/RandomRDDs.scala
@@ -20,7 +20,7 @@ package org.apache.spark.mllib.random
 import scala.reflect.ClassTag
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{DeveloperApi, Experimental, Since}
+import org.apache.spark.annotation.{DeveloperApi, Since}
 import org.apache.spark.api.java.{JavaDoubleRDD, JavaRDD, JavaSparkContext}
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.mllib.linalg.Vector
@@ -29,10 +29,8 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.util.Utils
 
 /**
- * :: Experimental ::
  * Generator methods for creating RDDs comprised of `i.i.d.` samples from some distribution.
  */
-@Experimental
 @Since("1.1.0")
 object RandomRDDs {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/IsotonicRegression.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/IsotonicRegression.scala
index 877d31ba4130..ec78ea24539b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/IsotonicRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/IsotonicRegression.scala
@@ -29,7 +29,7 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.{JavaDoubleRDD, JavaRDD}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.{Loader, Saveable}
@@ -37,8 +37,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.SQLContext
 
 /**
- * :: Experimental ::
- *
  * Regression model for isotonic regression.
  *
  * @param boundaries Array of boundaries for which predictions are known.
@@ -49,7 +47,6 @@ import org.apache.spark.sql.SQLContext
  *
  */
 @Since("1.3.0")
-@Experimental
 class IsotonicRegressionModel @Since("1.3.0") (
     @Since("1.3.0") val boundaries: Array[Double],
     @Since("1.3.0") val predictions: Array[Double],
@@ -233,8 +230,6 @@ object IsotonicRegressionModel extends Loader[IsotonicRegressionModel] {
 }
 
 /**
- * :: Experimental ::
- *
  * Isotonic regression.
  * Currently implemented using parallelized pool adjacent violators algorithm.
  * Only univariate (single feature) algorithm supported.
@@ -252,7 +247,6 @@ object IsotonicRegressionModel extends Loader[IsotonicRegressionModel] {
  *
  * @see [[http://en.wikipedia.org/wiki/Isotonic_regression Isotonic regression (Wikipedia)]]
  */
-@Experimental
 @Since("1.3.0")
 class IsotonicRegression private (private var isotonic: Boolean) extends Serializable {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/RegressionModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/RegressionModel.scala
index 0e72d6591ce8..a95a54225a08 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/RegressionModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/RegressionModel.scala
@@ -19,13 +19,12 @@ package org.apache.spark.mllib.regression
 
 import org.json4s.{DefaultFormats, JValue}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.rdd.RDD
 
 @Since("0.8.0")
-@Experimental
 trait RegressionModel extends Serializable {
   /**
    * Predict values for the given data set using the model trained.
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/regression/StreamingLinearRegressionWithSGD.scala b/mllib/src/main/scala/org/apache/spark/mllib/regression/StreamingLinearRegressionWithSGD.scala
index fe1d487cdd07..fe2a46b9eecc 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/regression/StreamingLinearRegressionWithSGD.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/regression/StreamingLinearRegressionWithSGD.scala
@@ -17,11 +17,10 @@
 
 package org.apache.spark.mllib.regression
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.linalg.Vector
 
 /**
- * :: Experimental ::
  * Train or predict a linear regression model on streaming data. Training uses
  * Stochastic Gradient Descent to update the model based on each new batch of
  * incoming data from a DStream (see `LinearRegressionWithSGD` for model equation)
@@ -40,7 +39,6 @@ import org.apache.spark.mllib.linalg.Vector
  *    .setInitialWeights(Vectors.dense(...))
  *    .trainOn(DStream)
  */
-@Experimental
 @Since("1.1.0")
 class StreamingLinearRegressionWithSGD private[mllib] (
     private var stepSize: Double,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/KernelDensity.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/KernelDensity.scala
index 4a856f7f3434..f253963270bc 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/KernelDensity.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/KernelDensity.scala
@@ -19,12 +19,11 @@ package org.apache.spark.mllib.stat
 
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.rdd.RDD
 
 /**
- * :: Experimental ::
  * Kernel density estimation. Given a sample from a population, estimate its probability density
  * function at each of the given evaluation points using kernels. Only Gaussian kernel is supported.
  *
@@ -39,7 +38,6 @@ import org.apache.spark.rdd.RDD
  * }}}
  */
 @Since("1.4.0")
-@Experimental
 class KernelDensity extends Serializable {
 
   import KernelDensity._
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
index 84d64a5bfb38..bcb33a7a0467 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/Statistics.scala
@@ -19,7 +19,7 @@ package org.apache.spark.mllib.stat
 
 import scala.annotation.varargs
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.{JavaRDD, JavaDoubleRDD}
 import org.apache.spark.mllib.linalg.distributed.RowMatrix
 import org.apache.spark.mllib.linalg.{Matrix, Vector}
@@ -30,11 +30,9 @@ import org.apache.spark.mllib.stat.test.{ChiSqTest, ChiSqTestResult, KolmogorovS
 import org.apache.spark.rdd.RDD
 
 /**
- * :: Experimental ::
  * API for statistical functions in MLlib.
  */
 @Since("1.1.0")
-@Experimental
 object Statistics {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
index b0916d3e8465..8a29fd39a910 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/test/TestResult.scala
@@ -20,11 +20,9 @@ package org.apache.spark.mllib.stat.test
 import org.apache.spark.annotation.{Experimental, Since}
 
 /**
- * :: Experimental ::
  * Trait for hypothesis test results.
  * @tparam DF Return type of `degreesOfFreedom`.
  */
-@Experimental
 @Since("1.1.0")
 trait TestResult[DF] {
 
@@ -79,10 +77,8 @@ trait TestResult[DF] {
 }
 
 /**
- * :: Experimental ::
  * Object containing the test results for the chi-squared hypothesis test.
  */
-@Experimental
 @Since("1.1.0")
 class ChiSqTestResult private[stat] (override val pValue: Double,
     @Since("1.1.0") override val degreesOfFreedom: Int,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
index 53d6482f8057..af1f7e74c004 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/DecisionTree.scala
@@ -21,7 +21,7 @@ import scala.collection.JavaConverters._
 import scala.collection.mutable
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.tree.RandomForest.NodeIndexInfo
@@ -36,7 +36,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.util.random.XORShiftRandom
 
 /**
- * :: Experimental ::
  * A class which implements a decision tree learning algorithm for classification and regression.
  * It supports both continuous and categorical features.
  * @param strategy The configuration parameters for the tree algorithm which specify the type
@@ -44,7 +43,6 @@ import org.apache.spark.util.random.XORShiftRandom
  *                 categorical), depth of the tree, quantile calculation strategy, etc.
  */
 @Since("1.0.0")
-@Experimental
 class DecisionTree @Since("1.0.0") (private val strategy: Strategy)
   extends Serializable with Logging {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
index 66a07e31360d..729a21157482 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/GradientBoostedTrees.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.mllib.tree
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.impl.PeriodicRDDCheckpointer
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -31,7 +31,6 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.StorageLevel
 
 /**
- * :: Experimental ::
  * A class that implements
  * [[http://en.wikipedia.org/wiki/Gradient_boosting  Stochastic Gradient Boosting]]
  * for regression and binary classification.
@@ -50,7 +49,6 @@ import org.apache.spark.storage.StorageLevel
  * @param boostingStrategy Parameters for the gradient boosting algorithm.
  */
 @Since("1.2.0")
-@Experimental
 class GradientBoostedTrees @Since("1.2.0") (private val boostingStrategy: BoostingStrategy)
   extends Serializable with Logging {
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/RandomForest.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/RandomForest.scala
index 63a902f3eb51..a684cdd18c2f 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/RandomForest.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/RandomForest.scala
@@ -23,7 +23,7 @@ import scala.collection.mutable
 import scala.collection.JavaConverters._
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.tree.configuration.Strategy
@@ -39,7 +39,6 @@ import org.apache.spark.util.Utils
 import org.apache.spark.util.random.SamplingUtils
 
 /**
- * :: Experimental ::
  * A class that implements a [[http://en.wikipedia.org/wiki/Random_forest  Random Forest]]
  * learning algorithm for classification and regression.
  * It supports both continuous and categorical features.
@@ -66,7 +65,6 @@ import org.apache.spark.util.random.SamplingUtils
  *                                  to "onethird" for regression.
  * @param seed Random seed for bootstrapping and choosing feature subsets.
  */
-@Experimental
 private class RandomForest (
     private val strategy: Strategy,
     private val numTrees: Int,
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
index fc13bcfd8e99..d2513a9d5c5b 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/BoostingStrategy.scala
@@ -19,12 +19,11 @@ package org.apache.spark.mllib.tree.configuration
 
 import scala.beans.BeanProperty
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.tree.configuration.Algo._
 import org.apache.spark.mllib.tree.loss.{LogLoss, SquaredError, Loss}
 
 /**
- * :: Experimental ::
  * Configuration options for [[org.apache.spark.mllib.tree.GradientBoostedTrees]].
  *
  * @param treeStrategy Parameters for the tree algorithm. We support regression and binary
@@ -47,7 +46,6 @@ import org.apache.spark.mllib.tree.loss.{LogLoss, SquaredError, Loss}
  *                      [[org.apache.spark.mllib.tree.GradientBoostedTrees.run()]] is used.
  */
 @Since("1.2.0")
-@Experimental
 case class BoostingStrategy @Since("1.4.0") (
     // Required boosting parameters
     @Since("1.2.0") @BeanProperty var treeStrategy: Strategy,
@@ -79,7 +77,6 @@ case class BoostingStrategy @Since("1.4.0") (
 }
 
 @Since("1.2.0")
-@Experimental
 object BoostingStrategy {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/FeatureType.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/FeatureType.scala
index 4e0cd473def0..1470295d8a93 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/FeatureType.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/FeatureType.scala
@@ -17,14 +17,12 @@
 
 package org.apache.spark.mllib.tree.configuration
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 
 /**
- * :: Experimental ::
  * Enum to describe whether a feature is "continuous" or "categorical"
  */
 @Since("1.0.0")
-@Experimental
 object FeatureType extends Enumeration {
   @Since("1.0.0")
   type FeatureType = Value
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/QuantileStrategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/QuantileStrategy.scala
index 8262db8a4f11..1c16f136eb3e 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/QuantileStrategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/QuantileStrategy.scala
@@ -17,14 +17,12 @@
 
 package org.apache.spark.mllib.tree.configuration
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 
 /**
- * :: Experimental ::
  * Enum for selecting the quantile calculation strategy
  */
 @Since("1.0.0")
-@Experimental
 object QuantileStrategy extends Enumeration {
   @Since("1.0.0")
   type QuantileStrategy = Value
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
index 89cc13b7c06c..372d6617a401 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/configuration/Strategy.scala
@@ -20,13 +20,12 @@ package org.apache.spark.mllib.tree.configuration
 import scala.beans.BeanProperty
 import scala.collection.JavaConverters._
 
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.mllib.tree.impurity.{Variance, Entropy, Gini, Impurity}
 import org.apache.spark.mllib.tree.configuration.Algo._
 import org.apache.spark.mllib.tree.configuration.QuantileStrategy._
 
 /**
- * :: Experimental ::
  * Stores all the configuration options for tree construction
  * @param algo  Learning goal.  Supported:
  *              [[org.apache.spark.mllib.tree.configuration.Algo.Classification]],
@@ -68,7 +67,6 @@ import org.apache.spark.mllib.tree.configuration.QuantileStrategy._
  *                           [[org.apache.spark.SparkContext]], this setting is ignored.
  */
 @Since("1.0.0")
-@Experimental
 class Strategy @Since("1.3.0") (
     @Since("1.0.0") @BeanProperty var algo: Algo,
     @Since("1.0.0") @BeanProperty var impurity: Impurity,
@@ -179,7 +177,6 @@ class Strategy @Since("1.3.0") (
 }
 
 @Since("1.2.0")
-@Experimental
 object Strategy {
 
   /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/TimeTracker.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/TimeTracker.scala
index aac84243d5ce..70afaa162b2e 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/TimeTracker.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/impl/TimeTracker.scala
@@ -19,12 +19,9 @@ package org.apache.spark.mllib.tree.impl
 
 import scala.collection.mutable.{HashMap => MutableHashMap}
 
-import org.apache.spark.annotation.Experimental
-
 /**
  * Time tracker implementation which holds labeled timers.
  */
-@Experimental
 private[spark] class TimeTracker extends Serializable {
 
   private val starts: MutableHashMap[String, Long] = new MutableHashMap[String, Long]()
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/DecisionTreeModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/DecisionTreeModel.scala
index e1bf23f4c34b..54c136aecf66 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/DecisionTreeModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/DecisionTreeModel.scala
@@ -24,7 +24,7 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.{Logging, SparkContext}
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.tree.configuration.{Algo, FeatureType}
@@ -35,14 +35,12 @@ import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 import org.apache.spark.util.Utils
 
 /**
- * :: Experimental ::
  * Decision tree model for classification or regression.
  * This model stores the decision tree structure and parameters.
  * @param topNode root node
  * @param algo algorithm type -- classification or regression
  */
 @Since("1.0.0")
-@Experimental
 class DecisionTreeModel @Since("1.0.0") (
     @Since("1.0.0") val topNode: Node,
     @Since("1.0.0") val algo: Algo) extends Serializable with Saveable {
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/treeEnsembleModels.scala b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/treeEnsembleModels.scala
index df5b8feab5d5..90e032e3d984 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/tree/model/treeEnsembleModels.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/tree/model/treeEnsembleModels.scala
@@ -25,7 +25,7 @@ import org.json4s.JsonDSL._
 import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.{Logging, SparkContext}
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -38,16 +38,13 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.util.Utils
 
-
 /**
- * :: Experimental ::
  * Represents a random forest model.
  *
  * @param algo algorithm for the ensemble model, either Classification or Regression
  * @param trees tree ensembles
  */
 @Since("1.2.0")
-@Experimental
 class RandomForestModel @Since("1.2.0") (
     @Since("1.2.0") override val algo: Algo,
     @Since("1.2.0") override val trees: Array[DecisionTreeModel])
@@ -108,7 +105,6 @@ object RandomForestModel extends Loader[RandomForestModel] {
 }
 
 /**
- * :: Experimental ::
  * Represents a gradient boosted trees model.
  *
  * @param algo algorithm for the ensemble model, either Classification or Regression
@@ -116,7 +112,6 @@ object RandomForestModel extends Loader[RandomForestModel] {
  * @param treeWeights tree ensemble weights
  */
 @Since("1.2.0")
-@Experimental
 class GradientBoostedTreesModel @Since("1.2.0") (
     @Since("1.2.0") override val algo: Algo,
     @Since("1.2.0") override val trees: Array[DecisionTreeModel],
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala b/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
index 81c2f0ce6e12..414ea99cfd8c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/util/MLUtils.scala
@@ -19,9 +19,7 @@ package org.apache.spark.mllib.util
 
 import scala.reflect.ClassTag
 
-import breeze.linalg.{DenseVector => BDV, SparseVector => BSV}
-
-import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.annotation.Since
 import org.apache.spark.SparkContext
 import org.apache.spark.rdd.RDD
 import org.apache.spark.rdd.PartitionwiseSampledRDD
@@ -30,8 +28,6 @@ import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.linalg.{SparseVector, DenseVector, Vector, Vectors}
 import org.apache.spark.mllib.linalg.BLAS.dot
 import org.apache.spark.storage.StorageLevel
-import org.apache.spark.streaming.StreamingContext
-import org.apache.spark.streaming.dstream.DStream
 
 /**
  * Helper methods to load, save and pre-process data used in ML Lib.
@@ -263,13 +259,11 @@ object MLUtils {
   }
 
   /**
-   * :: Experimental ::
    * Return a k element array of pairs of RDDs with the first element of each pair
    * containing the training data, a complement of the validation data and the second
    * element, the validation data, containing a unique 1/kth of the data. Where k=numFolds.
    */
   @Since("1.0.0")
-  @Experimental
   def kFold[T: ClassTag](rdd: RDD[T], numFolds: Int, seed: Int): Array[(RDD[T], RDD[T])] = {
     val numFoldsF = numFolds.toFloat
     (1 to numFolds).map { fold =>

From 8b292b19c9b3aaaa51b919a12132e099e5be832d Mon Sep 17 00:00:00 2001
From: Reza Zadeh <reza@databricks.com>
Date: Mon, 26 Oct 2015 22:00:24 -0700
Subject: [PATCH 373/896] [SPARK-10654][MLLIB] Add columnSimilarities to
 IndexedRowMatrix

Add columnSimilarities to IndexedRowMatrix by delegating to functionality already in RowMatrix.

With a test.

Author: Reza Zadeh <reza@databricks.com>

Closes #8792 from rezazadeh/colsims.
---
 .../mllib/linalg/distributed/IndexedRowMatrix.scala | 13 +++++++++++++
 .../linalg/distributed/IndexedRowMatrixSuite.scala  | 12 ++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
index e6af0c0ec7ec..976299124ced 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
@@ -68,6 +68,19 @@ class IndexedRowMatrix @Since("1.0.0") (
     nRows
   }
 
+
+  /**
+   * Compute all cosine similarities between columns of this matrix using the brute-force
+   * approach of computing normalized dot products.
+   *
+   * @return An n x n sparse upper-triangular matrix of cosine similarities between
+   *         columns of this matrix.
+   */
+  @Since("1.6.0")
+  def columnSimilarities(): CoordinateMatrix = {
+    toRowMatrix().columnSimilarities()
+  }
+
   /**
    * Drops row indices and converts this matrix to a
    * [[org.apache.spark.mllib.linalg.distributed.RowMatrix]].
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrixSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrixSuite.scala
index 0ecb7a221a50..6de6cf2fa863 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrixSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrixSuite.scala
@@ -153,6 +153,18 @@ class IndexedRowMatrixSuite extends SparkFunSuite with MLlibTestSparkContext {
     }
   }
 
+  test("similar columns") {
+    val A = new IndexedRowMatrix(indexedRows)
+    val gram = A.computeGramianMatrix().toBreeze.toDenseMatrix
+
+    val G = A.columnSimilarities().toBreeze()
+
+    for (i <- 0 until n; j <- i + 1 until n) {
+      val trueResult = gram(i, j) / scala.math.sqrt(gram(i, i) * gram(j, j))
+      assert(math.abs(G(i, j) - trueResult) < 1e-6)
+    }
+  }
+
   def closeToZero(G: BDM[Double]): Boolean = {
     G.valuesIterator.map(math.abs).sum < 1e-6
   }

From d77d198fcc7c532a699f062a3e3877a7679809da Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Mon, 26 Oct 2015 23:53:41 -0700
Subject: [PATCH 374/896] [SPARK-11297] Add new code tags

mengxr https://issues.apache.org/jira/browse/SPARK-11297

Add new code tags to hold the same look and feel with previous documents.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9265 from yinxusen/SPARK-11297.
---
 docs/css/main.css | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/css/main.css b/docs/css/main.css
index 89305a7d3a35..d770173be101 100755
--- a/docs/css/main.css
+++ b/docs/css/main.css
@@ -74,6 +74,10 @@ code {
   color: #444444;
 }
 
+div .highlight pre {
+  font-size: 12px;
+}
+
 a code {
   color: #0088cc;
 }

From feb8d6a44fbfc31a880aaaac0cfcaadc91786073 Mon Sep 17 00:00:00 2001
From: Sem Mulder <sem.mulder@site2mobile.com>
Date: Tue, 27 Oct 2015 07:55:10 +0000
Subject: [PATCH 375/896] [SPARK-11276][CORE] SizeEstimator prevents class
 unloading

The SizeEstimator keeps a cache of ClassInfos but this cache uses Class objects as keys.
Which results in strong references to the Class objects. If these classes are dynamically created
this prevents the corresponding ClassLoader from being GCed. Leading to PermGen exhaustion.

We use a Map with WeakKeys to prevent this issue.

Author: Sem Mulder <sem.mulder@site2mobile.com>

Closes #9244 from SemMulder/fix-sizeestimator-classunloading.
---
 .../main/scala/org/apache/spark/util/SizeEstimator.scala    | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
index 14b1f2a17e70..23ee4eff0881 100644
--- a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
+++ b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.util
 
+import com.google.common.collect.MapMaker
+
 import java.lang.management.ManagementFactory
 import java.lang.reflect.{Field, Modifier}
 import java.util.{IdentityHashMap, Random}
@@ -29,7 +31,6 @@ import org.apache.spark.Logging
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.util.collection.OpenHashSet
 
-
 /**
  * :: DeveloperApi ::
  * Estimates the sizes of Java objects (number of bytes of memory they occupy), for use in
@@ -73,7 +74,8 @@ object SizeEstimator extends Logging {
   private val ALIGN_SIZE = 8
 
   // A cache of ClassInfo objects for each class
-  private val classInfos = new ConcurrentHashMap[Class[_], ClassInfo]
+  // We use weakKeys to allow GC of dynamically created classes
+  private val classInfos = new MapMaker().weakKeys().makeMap[Class[_], ClassInfo]()
 
   // Object and pointer sizes are arch dependent
   private var is64bit = false

From 8f888eea1aef5a28916ec406a99fc19648681ecf Mon Sep 17 00:00:00 2001
From: Nick Evans <me@nicolasevans.org>
Date: Tue, 27 Oct 2015 01:29:06 -0700
Subject: [PATCH 376/896] [SPARK-11270][STREAMING] Add improved equality
 testing for TopicAndPartition from the Kafka Streaming API

jerryshao tdas

I know this is kind of minor, and I know you all are busy, but this brings this class in line with the `OffsetRange` class, and makes tests a little more concise.

Instead of doing something like:
```
assert topic_and_partition_instance._topic == "foo"
assert topic_and_partition_instance._partition == 0
```

You can do something like:
```
assert topic_and_partition_instance == TopicAndPartition("foo", 0)
```

Before:
```
>>> from pyspark.streaming.kafka import TopicAndPartition
>>> TopicAndPartition("foo", 0) == TopicAndPartition("foo", 0)
False
```

After:
```
>>> from pyspark.streaming.kafka import TopicAndPartition
>>> TopicAndPartition("foo", 0) == TopicAndPartition("foo", 0)
True
```

I couldn't find any tests - am I missing something?

Author: Nick Evans <me@nicolasevans.org>

Closes #9236 from manygrams/topic_and_partition_equality.
---
 python/pyspark/streaming/kafka.py | 10 ++++++++++
 python/pyspark/streaming/tests.py | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/python/pyspark/streaming/kafka.py b/python/pyspark/streaming/kafka.py
index b35bbaf404cc..06e159172ab5 100644
--- a/python/pyspark/streaming/kafka.py
+++ b/python/pyspark/streaming/kafka.py
@@ -254,6 +254,16 @@ def __init__(self, topic, partition):
     def _jTopicAndPartition(self, helper):
         return helper.createTopicAndPartition(self._topic, self._partition)
 
+    def __eq__(self, other):
+        if isinstance(other, self.__class__):
+            return (self._topic == other._topic
+                    and self._partition == other._partition)
+        else:
+            return False
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
 
 class Broker(object):
     """
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 2c908daa8b21..f7fa481d5023 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -898,6 +898,16 @@ def transformWithOffsetRanges(rdd):
 
         self.assertEqual(offsetRanges, [OffsetRange(topic, 0, long(0), long(6))])
 
+    def test_topic_and_partition_equality(self):
+        topic_and_partition_a = TopicAndPartition("foo", 0)
+        topic_and_partition_b = TopicAndPartition("foo", 0)
+        topic_and_partition_c = TopicAndPartition("bar", 0)
+        topic_and_partition_d = TopicAndPartition("foo", 1)
+
+        self.assertEqual(topic_and_partition_a, topic_and_partition_b)
+        self.assertNotEqual(topic_and_partition_a, topic_and_partition_c)
+        self.assertNotEqual(topic_and_partition_a, topic_and_partition_d)
+
 
 class FlumeStreamTests(PySparkStreamingTestCase):
     timeout = 20  # seconds

From 17f499920776e0e995434cfa300ff2ff38658fa8 Mon Sep 17 00:00:00 2001
From: maxwell <maxwellzdm@gmail.com>
Date: Tue, 27 Oct 2015 01:31:28 -0700
Subject: [PATCH 377/896] [SPARK-5569][STREAMING] fix
 ObjectInputStreamWithLoader for supporting load array classes.

When use Kafka DirectStream API to create checkpoint and restore saved checkpoint when restart,
ClassNotFound exception would occur.

The reason for this error is that ObjectInputStreamWithLoader extends the ObjectInputStream class and override its resolveClass method. But Instead of Using Class.forName(desc,false,loader), Spark uses loader.loadClass(desc) to instance the class, which do not works with array class.

For example:
Class.forName("[Lorg.apache.spark.streaming.kafka.OffsetRange.",false,loader) works well while loader.loadClass("[Lorg.apache.spark.streaming.kafka.OffsetRange") would throw an class not found exception.

details of the difference between Class.forName and loader.loadClass can be found here.
http://bugs.java.com/view_bug.do?bug_id=6446627

Author: maxwell <maxwellzdm@gmail.com>
Author: DEMING ZHU <deming.zhu@linecorp.com>

Closes #8955 from maxwellzdm/master.
---
 .../apache/spark/streaming/Checkpoint.scala   |  4 ++-
 .../spark/streaming/CheckpointSuite.scala     | 35 +++++++++++++++++--
 2 files changed, 36 insertions(+), 3 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
index 8a6050f5227b..b7de6dde61c6 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
@@ -352,7 +352,9 @@ class ObjectInputStreamWithLoader(inputStream_ : InputStream, loader: ClassLoade
 
   override def resolveClass(desc: ObjectStreamClass): Class[_] = {
     try {
-      return loader.loadClass(desc.getName())
+      // scalastyle:off classforname
+      return Class.forName(desc.getName(), false, loader)
+      // scalastyle:on classforname
     } catch {
       case e: Exception =>
     }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
index a6956533c07a..84f5294aa39c 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
@@ -17,7 +17,8 @@
 
 package org.apache.spark.streaming
 
-import java.io.File
+import java.io.{ObjectOutputStream, ByteArrayOutputStream, ByteArrayInputStream, File}
+import org.apache.spark.TestUtils
 
 import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
 import scala.reflect.ClassTag
@@ -34,7 +35,7 @@ import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.streaming.dstream.{DStream, FileInputDStream}
 import org.apache.spark.streaming.scheduler.{ConstantEstimator, RateTestInputDStream, RateTestReceiver}
-import org.apache.spark.util.{Clock, ManualClock, Utils}
+import org.apache.spark.util.{MutableURLClassLoader, Clock, ManualClock, Utils}
 
 /**
  * This test suites tests the checkpointing functionality of DStreams -
@@ -579,6 +580,36 @@ class CheckpointSuite extends TestSuiteBase {
     }
   }
 
+  // This tests whether spark can deserialize array object
+  // refer to SPARK-5569
+  test("recovery from checkpoint contains array object") {
+    // create a class which is invisible to app class loader
+    val jar = TestUtils.createJarWithClasses(
+      classNames = Seq("testClz"),
+      toStringValue = "testStringValue"
+      )
+
+    // invisible to current class loader
+    val appClassLoader = getClass.getClassLoader
+    intercept[ClassNotFoundException](appClassLoader.loadClass("testClz"))
+
+    // visible to mutableURLClassLoader
+    val loader = new MutableURLClassLoader(
+      Array(jar), appClassLoader)
+    assert(loader.loadClass("testClz").newInstance().toString == "testStringValue")
+
+    // create and serialize Array[testClz]
+    // scalastyle:off classforname
+    val arrayObj = Class.forName("[LtestClz;", false, loader)
+    // scalastyle:on classforname
+    val bos = new ByteArrayOutputStream()
+    new ObjectOutputStream(bos).writeObject(arrayObj)
+
+    // deserialize the Array[testClz]
+    val ois = new ObjectInputStreamWithLoader(
+      new ByteArrayInputStream(bos.toByteArray), loader)
+    assert(ois.readObject().asInstanceOf[Class[_]].getName == "[LtestClz;")
+  }
 
   /**
    * Tests a streaming operation under checkpointing, by restarting the operation

From 958a0ec8fa58ff091f595db2b574a7aa3ff41253 Mon Sep 17 00:00:00 2001
From: Jia Li <jiali@us.ibm.com>
Date: Tue, 27 Oct 2015 10:57:08 +0100
Subject: [PATCH 378/896] [SPARK-11277][SQL] sort_array throws exception
 scala.MatchError

I'm new to spark. I was trying out the sort_array function then hit this exception. I looked into the spark source code. I found the root cause is that sort_array does not check for an array of NULLs. It's not meaningful to sort an array of entirely NULLs anyway.

I'm adding a check on the input array type to SortArray. If the array consists of NULLs entirely, there is no need to sort such array. I have also added a test case for this.

Please help to review my fix. Thanks!

Author: Jia Li <jiali@us.ibm.com>

Closes #9247 from jliwork/SPARK-11277.
---
 .../sql/catalyst/expressions/collectionOperations.scala    | 6 +++++-
 .../catalyst/expressions/CollectionFunctionsSuite.scala    | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
index 89d87726ac64..2cf19b939f73 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
@@ -68,6 +68,7 @@ case class SortArray(base: Expression, ascendingOrder: Expression)
   private lazy val lt: Comparator[Any] = {
     val ordering = base.dataType match {
       case _ @ ArrayType(n: AtomicType, _) => n.ordering.asInstanceOf[Ordering[Any]]
+      case _ @ ArrayType(s: StructType, _) => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
     }
 
     new Comparator[Any]() {
@@ -89,6 +90,7 @@ case class SortArray(base: Expression, ascendingOrder: Expression)
   private lazy val gt: Comparator[Any] = {
     val ordering = base.dataType match {
       case _ @ ArrayType(n: AtomicType, _) => n.ordering.asInstanceOf[Ordering[Any]]
+      case _ @ ArrayType(s: StructType, _) => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
     }
 
     new Comparator[Any]() {
@@ -109,7 +111,9 @@ case class SortArray(base: Expression, ascendingOrder: Expression)
   override def nullSafeEval(array: Any, ascending: Any): Any = {
     val elementType = base.dataType.asInstanceOf[ArrayType].elementType
     val data = array.asInstanceOf[ArrayData].toArray[AnyRef](elementType)
-    java.util.Arrays.sort(data, if (ascending.asInstanceOf[Boolean]) lt else gt)
+    if (elementType != NullType) {
+      java.util.Arrays.sort(data, if (ascending.asInstanceOf[Boolean]) lt else gt)
+    }
     new GenericArrayData(data.asInstanceOf[Array[Any]])
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionFunctionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionFunctionsSuite.scala
index a3e81888dfd0..1aae4678d627 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionFunctionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CollectionFunctionsSuite.scala
@@ -49,6 +49,7 @@ class CollectionFunctionsSuite extends SparkFunSuite with ExpressionEvalHelper {
     val a1 = Literal.create(Seq[Integer](), ArrayType(IntegerType))
     val a2 = Literal.create(Seq("b", "a"), ArrayType(StringType))
     val a3 = Literal.create(Seq("b", null, "a"), ArrayType(StringType))
+    val a4 = Literal.create(Seq(null, null), ArrayType(NullType))
 
     checkEvaluation(new SortArray(a0), Seq(1, 2, 3))
     checkEvaluation(new SortArray(a1), Seq[Integer]())
@@ -64,6 +65,12 @@ class CollectionFunctionsSuite extends SparkFunSuite with ExpressionEvalHelper {
     checkEvaluation(new SortArray(a3, Literal(false)), Seq("b", "a", null))
 
     checkEvaluation(Literal.create(null, ArrayType(StringType)), null)
+    checkEvaluation(new SortArray(a4), Seq(null, null))
+
+    val typeAS = ArrayType(StructType(StructField("a", IntegerType) :: Nil))
+    val arrayStruct = Literal.create(Seq(create_row(2), create_row(1)), typeAS)
+
+    checkEvaluation(new SortArray(arrayStruct), Seq(create_row(1), create_row(2)))
   }
 
   test("Array contains") {

From 360ed832f5213b805ac28cf1d2828be09480f2d6 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 27 Oct 2015 11:28:59 +0100
Subject: [PATCH 379/896] [SPARK-11303][SQL] filter should not be pushed down
 into sample

When sampling and then filtering DataFrame, the SQL Optimizer will push down filter into sample and produce wrong result. This is due to the sampler is calculated based on the original scope rather than the scope after filtering.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9294 from yanboliang/spark-11303.
---
 .../spark/sql/catalyst/optimizer/Optimizer.scala       |  4 ----
 .../scala/org/apache/spark/sql/SQLQuerySuite.scala     | 10 ++++++++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 0139b9e87ce8..d37f43888fd4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -74,10 +74,6 @@ object DefaultOptimizer extends Optimizer {
 object SamplePushDown extends Rule[LogicalPlan] {
 
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
-    // Push down filter into sample
-    case Filter(condition, s @ Sample(lb, up, replace, seed, child)) =>
-      Sample(lb, up, replace, seed,
-        Filter(condition, child))
     // Push down projection into sample
     case Project(projectList, s @ Sample(lb, up, replace, seed, child)) =>
       Sample(lb, up, replace, seed,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 298c32290697..f5ae3ae49b46 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1860,4 +1860,14 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         Row(1))
     }
   }
+
+  test("SPARK-11303: filter should not be pushed down into sample") {
+    val df = sqlContext.range(100)
+    List(true, false).foreach { withReplacement =>
+      val sampled = df.sample(withReplacement, 0.1, 1)
+      val sampledOdd = sampled.filter("id % 2 != 0")
+      val sampledEven = sampled.filter("id % 2 = 0")
+      assert(sampled.count() == sampledOdd.count() + sampledEven.count())
+    }
+  }
 }

From 9fc16a82adb5f3db2a250765c11393794404a51b Mon Sep 17 00:00:00 2001
From: Kay Ousterhout <kayousterhout@gmail.com>
Date: Tue, 27 Oct 2015 10:46:43 -0700
Subject: [PATCH 380/896] [SPARK-11306] Fix hang when JVM exits.

This commit fixes a bug where, in Standalone mode, if a task fails and crashes the JVM, the
failure is considered a "normal failure" (meaning it's considered unrelated to the task), so
the failure isn't counted against the task's maximum number of failures:
https://github.com/apache/spark/commit/af3bc59d1f5d9d952c2d7ad1af599c49f1dbdaf0#diff-a755f3d892ff2506a7aa7db52022d77cL138.
As a result, if a task fails in a way that results in it crashing the JVM, it will continuously be
re-launched, resulting in a hang. This commit fixes that problem.

This bug was introduced by #8007; andrewor14 mccheah vanzin can you take a look at this?

This error is hard to trigger because we handle executor losses through 2 code paths (the second is via Akka, where Akka notices that the executor endpoint is disconnected).  In my setup, the Akka code path completes first, and doesn't have this bug, so things work fine (see my recent email to the dev list about this).  If I manually disable the Akka code path, I can see the hang (and this commit fixes the issue).

Author: Kay Ousterhout <kayousterhout@gmail.com>

Closes #9273 from kayousterhout/SPARK-11306.
---
 .../spark/scheduler/cluster/SparkDeploySchedulerBackend.scala   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
index 2625c3e7ac71..a4214c496166 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
@@ -137,7 +137,7 @@ private[spark] class SparkDeploySchedulerBackend(
 
   override def executorRemoved(fullId: String, message: String, exitStatus: Option[Int]) {
     val reason: ExecutorLossReason = exitStatus match {
-      case Some(code) => ExecutorExited(code, isNormalExit = true, message)
+      case Some(code) => ExecutorExited(code, isNormalExit = false, message)
       case None => SlaveLost(message)
     }
     logInfo("Executor %s removed: %s".format(fullId, message))

From 3bdbbc6c972567861044dd6a6dc82f35cd12442d Mon Sep 17 00:00:00 2001
From: Mike Dusenberry <mwdusenb@us.ibm.com>
Date: Tue, 27 Oct 2015 11:05:14 -0700
Subject: [PATCH 381/896] [SPARK-6488][MLLIB][PYTHON] Support
 addition/multiplication in PySpark's BlockMatrix

This PR adds addition and multiplication to PySpark's `BlockMatrix` class via `add` and `multiply` functions.

Author: Mike Dusenberry <mwdusenb@us.ibm.com>

Closes #9139 from dusenberrymw/SPARK-6488_Add_Addition_and_Multiplication_to_PySpark_BlockMatrix.
---
 python/pyspark/mllib/linalg/distributed.py | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/python/pyspark/mllib/linalg/distributed.py b/python/pyspark/mllib/linalg/distributed.py
index aec407de90aa..0e7605078863 100644
--- a/python/pyspark/mllib/linalg/distributed.py
+++ b/python/pyspark/mllib/linalg/distributed.py
@@ -775,6 +775,74 @@ def numCols(self):
         """
         return self._java_matrix_wrapper.call("numCols")
 
+    def add(self, other):
+        """
+        Adds two block matrices together. The matrices must have the
+        same size and matching `rowsPerBlock` and `colsPerBlock` values.
+        If one of the sub matrix blocks that are being added is a
+        SparseMatrix, the resulting sub matrix block will also be a
+        SparseMatrix, even if it is being added to a DenseMatrix. If
+        two dense sub matrix blocks are added, the output block will
+        also be a DenseMatrix.
+
+        >>> dm1 = Matrices.dense(3, 2, [1, 2, 3, 4, 5, 6])
+        >>> dm2 = Matrices.dense(3, 2, [7, 8, 9, 10, 11, 12])
+        >>> sm = Matrices.sparse(3, 2, [0, 1, 3], [0, 1, 2], [7, 11, 12])
+        >>> blocks1 = sc.parallelize([((0, 0), dm1), ((1, 0), dm2)])
+        >>> blocks2 = sc.parallelize([((0, 0), dm1), ((1, 0), dm2)])
+        >>> blocks3 = sc.parallelize([((0, 0), sm), ((1, 0), dm2)])
+        >>> mat1 = BlockMatrix(blocks1, 3, 2)
+        >>> mat2 = BlockMatrix(blocks2, 3, 2)
+        >>> mat3 = BlockMatrix(blocks3, 3, 2)
+
+        >>> mat1.add(mat2).toLocalMatrix()
+        DenseMatrix(6, 2, [2.0, 4.0, 6.0, 14.0, 16.0, 18.0, 8.0, 10.0, 12.0, 20.0, 22.0, 24.0], 0)
+
+        >>> mat1.add(mat3).toLocalMatrix()
+        DenseMatrix(6, 2, [8.0, 2.0, 3.0, 14.0, 16.0, 18.0, 4.0, 16.0, 18.0, 20.0, 22.0, 24.0], 0)
+        """
+        if not isinstance(other, BlockMatrix):
+            raise TypeError("Other should be a BlockMatrix, got %s" % type(other))
+
+        other_java_block_matrix = other._java_matrix_wrapper._java_model
+        java_block_matrix = self._java_matrix_wrapper.call("add", other_java_block_matrix)
+        return BlockMatrix(java_block_matrix, self.rowsPerBlock, self.colsPerBlock)
+
+    def multiply(self, other):
+        """
+        Left multiplies this BlockMatrix by `other`, another
+        BlockMatrix. The `colsPerBlock` of this matrix must equal the
+        `rowsPerBlock` of `other`. If `other` contains any SparseMatrix
+        blocks, they will have to be converted to DenseMatrix blocks.
+        The output BlockMatrix will only consist of DenseMatrix blocks.
+        This may cause some performance issues until support for
+        multiplying two sparse matrices is added.
+
+        >>> dm1 = Matrices.dense(2, 3, [1, 2, 3, 4, 5, 6])
+        >>> dm2 = Matrices.dense(2, 3, [7, 8, 9, 10, 11, 12])
+        >>> dm3 = Matrices.dense(3, 2, [1, 2, 3, 4, 5, 6])
+        >>> dm4 = Matrices.dense(3, 2, [7, 8, 9, 10, 11, 12])
+        >>> sm = Matrices.sparse(3, 2, [0, 1, 3], [0, 1, 2], [7, 11, 12])
+        >>> blocks1 = sc.parallelize([((0, 0), dm1), ((0, 1), dm2)])
+        >>> blocks2 = sc.parallelize([((0, 0), dm3), ((1, 0), dm4)])
+        >>> blocks3 = sc.parallelize([((0, 0), sm), ((1, 0), dm4)])
+        >>> mat1 = BlockMatrix(blocks1, 2, 3)
+        >>> mat2 = BlockMatrix(blocks2, 3, 2)
+        >>> mat3 = BlockMatrix(blocks3, 3, 2)
+
+        >>> mat1.multiply(mat2).toLocalMatrix()
+        DenseMatrix(2, 2, [242.0, 272.0, 350.0, 398.0], 0)
+
+        >>> mat1.multiply(mat3).toLocalMatrix()
+        DenseMatrix(2, 2, [227.0, 258.0, 394.0, 450.0], 0)
+        """
+        if not isinstance(other, BlockMatrix):
+            raise TypeError("Other should be a BlockMatrix, got %s" % type(other))
+
+        other_java_block_matrix = other._java_matrix_wrapper._java_model
+        java_block_matrix = self._java_matrix_wrapper.call("multiply", other_java_block_matrix)
+        return BlockMatrix(java_block_matrix, self.rowsPerBlock, self.colsPerBlock)
+
     def toLocalMatrix(self):
         """
         Collect the distributed matrix on the driver as a DenseMatrix.

From 5a5f65905a202e59bc85170b01c57a883718ddf6 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Tue, 27 Oct 2015 13:28:52 -0700
Subject: [PATCH 382/896] [SPARK-11347] [SQL] Support for joinWith in Datasets

This PR adds a new operation `joinWith` to a `Dataset`, which returns a `Tuple` for each pair where a given `condition` evaluates to true.

```scala
case class ClassData(a: String, b: Int)

val ds1 = Seq(ClassData("a", 1), ClassData("b", 2)).toDS()
val ds2 = Seq(("a", 1), ("b", 2)).toDS()

> ds1.joinWith(ds2, $"_1" === $"a").collect()
res0: Array((ClassData("a", 1), ("a", 1)), (ClassData("b", 2), ("b", 2)))
```

This operation is similar to the relation `join` function with one important difference in the result schema. Since `joinWith` preserves objects present on either side of the join, the result schema is similarly nested into a tuple under the column names `_1` and `_2`.

This type of join can be useful both for preserving type-safety with the original object types as well as working with relational data where either side of the join has column names in common.

## Required Changes to Encoders
In the process of working on this patch, several deficiencies to the way that we were handling encoders were discovered.  Specifically, it turned out to be very difficult to `rebind` the non-expression based encoders to extract the nested objects from the results of joins (and also typed selects that return tuples).

As a result the following changes were made.
 - `ClassEncoder` has been renamed to `ExpressionEncoder` and has been improved to also handle primitive types.  Additionally, it is now possible to take arbitrary expression encoders and rewrite them into a single encoder that returns a tuple.
 - All internal operations on `Dataset`s now require an `ExpressionEncoder`.  If the users tries to pass a non-`ExpressionEncoder` in, an error will be thrown.  We can relax this requirement in the future by constructing a wrapper class that uses expressions to project the row to the expected schema, shielding the users code from the required remapping.  This will give us a nice balance where we don't force user encoders to understand attribute references and binding, but still allow our native encoder to leverage runtime code generation to construct specific encoders for a given schema that avoid an extra remapping step.
 - Additionally, the semantics for different types of objects are now better defined.  As stated in the `ExpressionEncoder` scaladoc:
  - Classes will have their sub fields extracted by name using `UnresolvedAttribute` expressions
  and `UnresolvedExtractValue` expressions.
  - Tuples will have their subfields extracted by position using `BoundReference` expressions.
  - Primitives will have their values extracted from the first ordinal with a schema that defaults
  to the name `value`.
 - Finally, the binding lifecycle for `Encoders` has now been unified across the codebase.  Encoders are now `resolved` to the appropriate schema in the constructor of `Dataset`.  This process replaces an unresolved expressions with concrete `AttributeReference` expressions.  Binding then happens on demand, when an encoder is going to be used to construct an object.  This closely mirrors the lifecycle for standard expressions when executing normal SQL or `DataFrame` queries.

Author: Michael Armbrust <michael@databricks.com>

Closes #9300 from marmbrus/datasets-tuples.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |  43 +++-
 .../sql/catalyst/encoders/ClassEncoder.scala  | 101 --------
 .../spark/sql/catalyst/encoders/Encoder.scala |  38 +--
 .../catalyst/encoders/ExpressionEncoder.scala | 217 ++++++++++++++++++
 .../catalyst/encoders/ProductEncoder.scala    |  47 ----
 .../sql/catalyst/encoders/RowEncoder.scala    |   5 +-
 .../sql/catalyst/encoders/package.scala}      |  29 +--
 .../catalyst/encoders/primitiveTypes.scala    | 100 --------
 .../spark/sql/catalyst/encoders/tuples.scala  | 173 --------------
 .../plans/logical/basicOperators.scala        |  28 +--
 ...ite.scala => ExpressionEncoderSuite.scala} |  39 ++--
 .../org/apache/spark/sql/DataFrame.scala      |   2 +-
 .../scala/org/apache/spark/sql/Dataset.scala  | 190 ++++++++-------
 .../org/apache/spark/sql/SQLContext.scala     |   4 +-
 .../org/apache/spark/sql/SQLImplicits.scala   |  13 +-
 .../spark/sql/execution/basicOperators.scala  |  16 +-
 .../org/apache/spark/sql/DatasetSuite.scala   |  89 ++++++-
 .../org/apache/spark/sql/QueryTest.scala      |  44 +++-
 18 files changed, 563 insertions(+), 615 deletions(-)
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
 rename sql/catalyst/src/{test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala => main/scala/org/apache/spark/sql/catalyst/encoders/package.scala} (56%)
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
 rename sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/{ProductEncoderSuite.scala => ExpressionEncoderSuite.scala} (91%)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index c25161ee81b6..9cbb7c2ffdc7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -146,6 +146,10 @@ trait ScalaReflection {
    * row with a compatible schema.  Fields of the row will be extracted using UnresolvedAttributes
    * of the same name as the constructor arguments.  Nested classes will have their fields accessed
    * using UnresolvedExtractValue.
+   *
+   * When used on a primitive type, the constructor will instead default to extracting the value
+   * from ordinal 0 (since there are no names to map to).  The actual location can be moved by
+   * calling unbind/bind with a new schema.
    */
   def constructorFor[T : TypeTag]: Expression = constructorFor(typeOf[T], None)
 
@@ -159,8 +163,14 @@ trait ScalaReflection {
         .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
         .getOrElse(UnresolvedAttribute(part))
 
+    /** Returns the current path with a field at ordinal extracted. */
+    def addToPathOrdinal(ordinal: Int, dataType: DataType) =
+      path
+        .map(p => GetStructField(p, StructField(s"_$ordinal", dataType), ordinal))
+        .getOrElse(BoundReference(ordinal, dataType, false))
+
     /** Returns the current path or throws an error. */
-    def getPath = path.getOrElse(sys.error("Constructors must start at a class type"))
+    def getPath = path.getOrElse(BoundReference(0, dataTypeFor(tpe), true))
 
     tpe match {
       case t if !dataTypeFor(t).isInstanceOf[ObjectType] =>
@@ -387,12 +397,17 @@ trait ScalaReflection {
         val className: String = t.erasure.typeSymbol.asClass.fullName
         val cls = Utils.classForName(className)
 
-        val arguments = params.head.map { p =>
+        val arguments = params.head.zipWithIndex.map { case (p, i) =>
           val fieldName = p.name.toString
           val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
-          val dataType = dataTypeFor(fieldType)
+          val dataType = schemaFor(fieldType).dataType
 
-          constructorFor(fieldType, Some(addToPath(fieldName)))
+          // For tuples, we based grab the inner fields by ordinal instead of name.
+          if (className startsWith "scala.Tuple") {
+            constructorFor(fieldType, Some(addToPathOrdinal(i, dataType)))
+          } else {
+            constructorFor(fieldType, Some(addToPath(fieldName)))
+          }
         }
 
         val newInstance = NewInstance(cls, arguments, propagateNull = false, ObjectType(cls))
@@ -413,7 +428,10 @@ trait ScalaReflection {
   /** Returns expressions for extracting all the fields from the given type. */
   def extractorsFor[T : TypeTag](inputObject: Expression): CreateNamedStruct = {
     ScalaReflectionLock.synchronized {
-      extractorFor(inputObject, typeTag[T].tpe).asInstanceOf[CreateNamedStruct]
+      extractorFor(inputObject, typeTag[T].tpe) match {
+        case s: CreateNamedStruct => s
+        case o => CreateNamedStruct(expressions.Literal("value") :: o :: Nil)
+      }
     }
   }
 
@@ -602,6 +620,21 @@ trait ScalaReflection {
         case t if t <:< localTypeOf[java.lang.Boolean] =>
           Invoke(inputObject, "booleanValue", BooleanType)
 
+        case t if t <:< definitions.IntTpe =>
+          BoundReference(0, IntegerType, false)
+        case t if t <:< definitions.LongTpe =>
+          BoundReference(0, LongType, false)
+        case t if t <:< definitions.DoubleTpe =>
+          BoundReference(0, DoubleType, false)
+        case t if t <:< definitions.FloatTpe =>
+          BoundReference(0, FloatType, false)
+        case t if t <:< definitions.ShortTpe =>
+          BoundReference(0, ShortType, false)
+        case t if t <:< definitions.ByteTpe =>
+          BoundReference(0, ByteType, false)
+        case t if t <:< definitions.BooleanTpe =>
+          BoundReference(0, BooleanType, false)
+
         case other =>
           throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
       }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
deleted file mode 100644
index b484b8fde636..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ClassEncoder.scala
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import scala.reflect.ClassTag
-
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, SimpleAnalyzer}
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
-import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
-import org.apache.spark.sql.types.{ObjectType, StructType}
-
-/**
- * A generic encoder for JVM objects.
- *
- * @param schema The schema after converting `T` to a Spark SQL row.
- * @param extractExpressions A set of expressions, one for each top-level field that can be used to
- *                           extract the values from a raw object.
- * @param clsTag A classtag for `T`.
- */
-case class ClassEncoder[T](
-    schema: StructType,
-    extractExpressions: Seq[Expression],
-    constructExpression: Expression,
-    clsTag: ClassTag[T])
-  extends Encoder[T] {
-
-  @transient
-  private lazy val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
-  private val inputRow = new GenericMutableRow(1)
-
-  @transient
-  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
-  private val dataType = ObjectType(clsTag.runtimeClass)
-
-  override def toRow(t: T): InternalRow = {
-    inputRow(0) = t
-    extractProjection(inputRow)
-  }
-
-  override def fromRow(row: InternalRow): T = {
-    constructProjection(row).get(0, dataType).asInstanceOf[T]
-  }
-
-  override def bind(schema: Seq[Attribute]): ClassEncoder[T] = {
-    val plan = Project(Alias(constructExpression, "object")() :: Nil, LocalRelation(schema))
-    val analyzedPlan = SimpleAnalyzer.execute(plan)
-    val resolvedExpression = analyzedPlan.expressions.head.children.head
-    val boundExpression = BindReferences.bindReference(resolvedExpression, schema)
-
-    copy(constructExpression = boundExpression)
-  }
-
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): ClassEncoder[T] = {
-    val positionToAttribute = AttributeMap.toIndex(oldSchema)
-    val attributeToNewPosition = AttributeMap.byIndex(newSchema)
-    copy(constructExpression = constructExpression transform {
-      case r: BoundReference =>
-        r.copy(ordinal = attributeToNewPosition(positionToAttribute(r.ordinal)))
-    })
-  }
-
-  override def bindOrdinals(schema: Seq[Attribute]): ClassEncoder[T] = {
-    var remaining = schema
-    copy(constructExpression = constructExpression transform {
-      case u: UnresolvedAttribute =>
-        val pos = remaining.head
-        remaining = remaining.drop(1)
-        pos
-    })
-  }
-
-  protected val attrs = extractExpressions.map(_.collect {
-    case a: Attribute => s"#${a.exprId}"
-    case b: BoundReference => s"[${b.ordinal}]"
-  }.headOption.getOrElse(""))
-
-
-  protected val schemaString =
-    schema
-      .zip(attrs)
-      .map { case(f, a) => s"${f.name}$a: ${f.dataType.simpleString}"}.mkString(", ")
-
-  override def toString: String = s"class[$schemaString]"
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index efb872ddb81e..329a132d3d8b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -18,10 +18,9 @@
 package org.apache.spark.sql.catalyst.encoders
 
 
+
 import scala.reflect.ClassTag
 
-import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types.StructType
 
 /**
@@ -30,44 +29,11 @@ import org.apache.spark.sql.types.StructType
  * Encoders are not intended to be thread-safe and thus they are allow to avoid internal locking
  * and reuse internal buffers to improve performance.
  */
-trait Encoder[T] {
+trait Encoder[T] extends Serializable {
 
   /** Returns the schema of encoding this type of object as a Row. */
   def schema: StructType
 
   /** A ClassTag that can be used to construct and Array to contain a collection of `T`. */
   def clsTag: ClassTag[T]
-
-  /**
-   * Returns an encoded version of `t` as a Spark SQL row.  Note that multiple calls to
-   * toRow are allowed to return the same actual [[InternalRow]] object.  Thus, the caller should
-   * copy the result before making another call if required.
-   */
-  def toRow(t: T): InternalRow
-
-  /**
-   * Returns an object of type `T`, extracting the required values from the provided row.  Note that
-   * you must `bind` an encoder to a specific schema before you can call this function.
-   */
-  def fromRow(row: InternalRow): T
-
-  /**
-   * Returns a new copy of this encoder, where the expressions used by `fromRow` are bound to the
-   * given schema.
-   */
-  def bind(schema: Seq[Attribute]): Encoder[T]
-
-  /**
-   * Binds this encoder to the given schema positionally.  In this binding, the first reference to
-   * any input is mapped to `schema(0)`, and so on for each input that is encountered.
-   */
-  def bindOrdinals(schema: Seq[Attribute]): Encoder[T]
-
-  /**
-   * Given an encoder that has already been bound to a given schema, returns a new encoder that
-   * where the positions are mapped from `oldSchema` to `newSchema`.  This can be used, for example,
-   * when you are trying to use an encoder on grouping keys that were orriginally part of a larger
-   * row, but now you have projected out only the key expressions.
-   */
-  def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[T]
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
new file mode 100644
index 000000000000..c287aebeeee0
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -0,0 +1,217 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.sql.catalyst.analysis.{SimpleAnalyzer, UnresolvedExtractValue, UnresolvedAttribute}
+import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
+import org.apache.spark.util.Utils
+
+import scala.reflect.ClassTag
+import scala.reflect.runtime.universe.{typeTag, TypeTag}
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.ScalaReflection
+import org.apache.spark.sql.types.{StructField, DataType, ObjectType, StructType}
+
+/**
+ * A factory for constructing encoders that convert objects and primitves to and from the
+ * internal row format using catalyst expressions and code generation.  By default, the
+ * expressions used to retrieve values from an input row when producing an object will be created as
+ * follows:
+ *  - Classes will have their sub fields extracted by name using [[UnresolvedAttribute]] expressions
+ *    and [[UnresolvedExtractValue]] expressions.
+ *  - Tuples will have their subfields extracted by position using [[BoundReference]] expressions.
+ *  - Primitives will have their values extracted from the first ordinal with a schema that defaults
+ *    to the name `value`.
+ */
+object ExpressionEncoder {
+  def apply[T : TypeTag](flat: Boolean = false): ExpressionEncoder[T] = {
+    // We convert the not-serializable TypeTag into StructType and ClassTag.
+    val mirror = typeTag[T].mirror
+    val cls = mirror.runtimeClass(typeTag[T].tpe)
+
+    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
+    val extractExpression = ScalaReflection.extractorsFor[T](inputObject)
+    val constructExpression = ScalaReflection.constructorFor[T]
+
+    new ExpressionEncoder[T](
+      extractExpression.dataType,
+      flat,
+      extractExpression.flatten,
+      constructExpression,
+      ClassTag[T](cls))
+  }
+
+  /**
+   * Given a set of N encoders, constructs a new encoder that produce objects as items in an
+   * N-tuple.  Note that these encoders should first be bound correctly to the combined input
+   * schema.
+   */
+  def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
+    val schema =
+      StructType(
+        encoders.zipWithIndex.map { case (e, i) => StructField(s"_${i + 1}", e.schema)})
+    val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
+    val extractExpressions = encoders.map {
+      case e if e.flat => e.extractExpressions.head
+      case other => CreateStruct(other.extractExpressions)
+    }
+    val constructExpression =
+      NewInstance(cls, encoders.map(_.constructExpression), false, ObjectType(cls))
+
+    new ExpressionEncoder[Any](
+      schema,
+      false,
+      extractExpressions,
+      constructExpression,
+      ClassTag.apply(cls))
+  }
+
+  /** A helper for producing encoders of Tuple2 from other encoders. */
+  def tuple[T1, T2](
+      e1: ExpressionEncoder[T1],
+      e2: ExpressionEncoder[T2]): ExpressionEncoder[(T1, T2)] =
+    tuple(e1 :: e2 :: Nil).asInstanceOf[ExpressionEncoder[(T1, T2)]]
+}
+
+/**
+ * A generic encoder for JVM objects.
+ *
+ * @param schema The schema after converting `T` to a Spark SQL row.
+ * @param extractExpressions A set of expressions, one for each top-level field that can be used to
+ *                           extract the values from a raw object.
+ * @param clsTag A classtag for `T`.
+ */
+case class ExpressionEncoder[T](
+    schema: StructType,
+    flat: Boolean,
+    extractExpressions: Seq[Expression],
+    constructExpression: Expression,
+    clsTag: ClassTag[T])
+  extends Encoder[T] {
+
+  if (flat) require(extractExpressions.size == 1)
+
+  @transient
+  private lazy val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
+  private val inputRow = new GenericMutableRow(1)
+
+  @transient
+  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
+
+  /**
+   * Returns an encoded version of `t` as a Spark SQL row.  Note that multiple calls to
+   * toRow are allowed to return the same actual [[InternalRow]] object.  Thus, the caller should
+   * copy the result before making another call if required.
+   */
+  def toRow(t: T): InternalRow = {
+    inputRow(0) = t
+    extractProjection(inputRow)
+  }
+
+  /**
+   * Returns an object of type `T`, extracting the required values from the provided row.  Note that
+   * you must `resolve` and `bind` an encoder to a specific schema before you can call this
+   * function.
+   */
+  def fromRow(row: InternalRow): T = try {
+    constructProjection(row).get(0, ObjectType(clsTag.runtimeClass)).asInstanceOf[T]
+  } catch {
+    case e: Exception =>
+      throw new RuntimeException(s"Error while decoding: $e\n${constructExpression.treeString}", e)
+  }
+
+  /**
+   * Returns a new copy of this encoder, where the expressions used by `fromRow` are resolved to the
+   * given schema.
+   */
+  def resolve(schema: Seq[Attribute]): ExpressionEncoder[T] = {
+    val plan = Project(Alias(constructExpression, "")() :: Nil, LocalRelation(schema))
+    val analyzedPlan = SimpleAnalyzer.execute(plan)
+    copy(constructExpression = analyzedPlan.expressions.head.children.head)
+  }
+
+  /**
+   * Returns a copy of this encoder where the expressions used to construct an object from an input
+   * row have been bound to the ordinals of the given schema.  Note that you need to first call
+   * resolve before bind.
+   */
+  def bind(schema: Seq[Attribute]): ExpressionEncoder[T] = {
+    copy(constructExpression = BindReferences.bindReference(constructExpression, schema))
+  }
+
+  /**
+   * Replaces any bound references in the schema with the attributes at the corresponding ordinal
+   * in the provided schema.  This can be used to "relocate" a given encoder to pull values from
+   * a different schema than it was initially bound to.  It can also be used to assign attributes
+   * to ordinal based extraction (i.e. because the input data was a tuple).
+   */
+  def unbind(schema: Seq[Attribute]): ExpressionEncoder[T] = {
+    val positionToAttribute = AttributeMap.toIndex(schema)
+    copy(constructExpression = constructExpression transform {
+      case b: BoundReference => positionToAttribute(b.ordinal)
+    })
+  }
+
+  /**
+   * Given an encoder that has already been bound to a given schema, returns a new encoder
+   * where the positions are mapped from `oldSchema` to `newSchema`.  This can be used, for example,
+   * when you are trying to use an encoder on grouping keys that were originally part of a larger
+   * row, but now you have projected out only the key expressions.
+   */
+  def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): ExpressionEncoder[T] = {
+    val positionToAttribute = AttributeMap.toIndex(oldSchema)
+    val attributeToNewPosition = AttributeMap.byIndex(newSchema)
+    copy(constructExpression = constructExpression transform {
+      case r: BoundReference =>
+        r.copy(ordinal = attributeToNewPosition(positionToAttribute(r.ordinal)))
+    })
+  }
+
+  /**
+   * Returns a copy of this encoder where the expressions used to create an object given an
+   * input row have been modified to pull the object out from a nested struct, instead of the
+   * top level fields.
+   */
+  def nested(input: Expression = BoundReference(0, schema, true)): ExpressionEncoder[T] = {
+    copy(constructExpression = constructExpression transform {
+      case u: Attribute if u != input =>
+        UnresolvedExtractValue(input, Literal(u.name))
+      case b: BoundReference if b != input =>
+        GetStructField(
+          input,
+          StructField(s"i[${b.ordinal}]", b.dataType),
+          b.ordinal)
+    })
+  }
+
+  protected val attrs = extractExpressions.flatMap(_.collect {
+    case _: UnresolvedAttribute => ""
+    case a: Attribute => s"#${a.exprId}"
+    case b: BoundReference => s"[${b.ordinal}]"
+  })
+
+  protected val schemaString =
+    schema
+      .zip(attrs)
+      .map { case(f, a) => s"${f.name}$a: ${f.dataType.simpleString}"}.mkString(", ")
+
+  override def toString: String = s"class[$schemaString]"
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
deleted file mode 100644
index 34f5e6c030f5..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import scala.reflect.ClassTag
-import scala.reflect.runtime.universe.{typeTag, TypeTag}
-
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.ScalaReflection
-import org.apache.spark.sql.types.{ObjectType, StructType}
-
-/**
- * A factory for constructing encoders that convert Scala's product type to/from the Spark SQL
- * internal binary representation.
- */
-object ProductEncoder {
-  def apply[T <: Product : TypeTag]: ClassEncoder[T] = {
-    // We convert the not-serializable TypeTag into StructType and ClassTag.
-    val mirror = typeTag[T].mirror
-    val cls = mirror.runtimeClass(typeTag[T].tpe)
-
-    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
-    val extractExpression = ScalaReflection.extractorsFor[T](inputObject)
-    val constructExpression = ScalaReflection.constructorFor[T]
-
-    new ClassEncoder[T](
-      extractExpression.dataType,
-      extractExpression.flatten,
-      constructExpression,
-      ClassTag[T](cls))
-  }
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index e9cc00a2b64c..0b42130a013b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -31,13 +31,14 @@ import org.apache.spark.unsafe.types.UTF8String
  * internal binary representation.
  */
 object RowEncoder {
-  def apply(schema: StructType): ClassEncoder[Row] = {
+  def apply(schema: StructType): ExpressionEncoder[Row] = {
     val cls = classOf[Row]
     val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
     val extractExpressions = extractorsFor(inputObject, schema)
     val constructExpression = constructorFor(schema)
-    new ClassEncoder[Row](
+    new ExpressionEncoder[Row](
       schema,
+      flat = false,
       extractExpressions.asInstanceOf[CreateStruct].children,
       constructExpression,
       ClassTag(cls))
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
similarity index 56%
rename from sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
index 52f8383faca9..d4642a500672 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/PrimitiveEncoderSuite.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
@@ -15,29 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.catalyst.encoders
+package org.apache.spark.sql.catalyst
 
-import org.apache.spark.SparkFunSuite
-
-class PrimitiveEncoderSuite extends SparkFunSuite {
-  test("long encoder") {
-    val enc = new LongEncoder()
-    val row = enc.toRow(10)
-    assert(row.getLong(0) == 10)
-    assert(enc.fromRow(row) == 10)
-  }
-
-  test("int encoder") {
-    val enc = new IntEncoder()
-    val row = enc.toRow(10)
-    assert(row.getInt(0) == 10)
-    assert(enc.fromRow(row) == 10)
-  }
-
-  test("string encoder") {
-    val enc = new StringEncoder()
-    val row = enc.toRow("test")
-    assert(row.getString(0) == "test")
-    assert(enc.fromRow(row) == "test")
+package object encoders {
+  private[sql] def encoderFor[A : Encoder]: ExpressionEncoder[A] = implicitly[Encoder[A]] match {
+    case e: ExpressionEncoder[A] => e
+    case _ => sys.error(s"Only expression encoders are supported today")
   }
 }
+
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
deleted file mode 100644
index a93f2d7c6115..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/primitiveTypes.scala
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import scala.reflect.ClassTag
-
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.sql.types._
-
-/** An encoder for primitive Long types. */
-case class LongEncoder(fieldName: String = "value", ordinal: Int = 0) extends Encoder[Long] {
-  private val row = UnsafeRow.createFromByteArray(64, 1)
-
-  override def clsTag: ClassTag[Long] = ClassTag.Long
-  override def schema: StructType =
-    StructType(StructField(fieldName, LongType) :: Nil)
-
-  override def fromRow(row: InternalRow): Long = row.getLong(ordinal)
-
-  override def toRow(t: Long): InternalRow = {
-    row.setLong(ordinal, t)
-    row
-  }
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[Long] = this
-  override def bind(schema: Seq[Attribute]): Encoder[Long] = this
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[Long] = this
-}
-
-/** An encoder for primitive Integer types. */
-case class IntEncoder(fieldName: String = "value", ordinal: Int = 0) extends Encoder[Int] {
-  private val row = UnsafeRow.createFromByteArray(64, 1)
-
-  override def clsTag: ClassTag[Int] = ClassTag.Int
-  override def schema: StructType =
-    StructType(StructField(fieldName, IntegerType) :: Nil)
-
-  override def fromRow(row: InternalRow): Int = row.getInt(ordinal)
-
-  override def toRow(t: Int): InternalRow = {
-    row.setInt(ordinal, t)
-    row
-  }
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[Int] = this
-  override def bind(schema: Seq[Attribute]): Encoder[Int] = this
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[Int] = this
-}
-
-/** An encoder for String types. */
-case class StringEncoder(
-    fieldName: String = "value",
-    ordinal: Int = 0) extends Encoder[String] {
-
-  val record = new SpecificMutableRow(StringType :: Nil)
-
-  @transient
-  lazy val projection =
-    GenerateUnsafeProjection.generate(BoundReference(0, StringType, true) :: Nil)
-
-  override def schema: StructType =
-    StructType(
-      StructField("value", StringType, nullable = false) :: Nil)
-
-  override def clsTag: ClassTag[String] = scala.reflect.classTag[String]
-
-
-  override final def fromRow(row: InternalRow): String = {
-    row.getString(ordinal)
-  }
-
-  override final def toRow(value: String): InternalRow = {
-    val utf8String = UTF8String.fromString(value)
-    record(0) = utf8String
-    // TODO: this is a bit of a hack to produce UnsafeRows
-    projection(record)
-  }
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[String] = this
-  override def bind(schema: Seq[Attribute]): Encoder[String] = this
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[String] = this
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
deleted file mode 100644
index a48eeda7d2e6..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/tuples.scala
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-
-import scala.reflect.ClassTag
-
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.types.{StructField, StructType}
-
-// Most of this file is codegen.
-// scalastyle:off
-
-/**
- * A set of composite encoders that take sub encoders and map each of their objects to a
- * Scala tuple.  Note that currently the implementation is fairly limited and only supports going
- * from an internal row to a tuple.
- */
-object TupleEncoder {
-
-  /** Code generator for composite tuple encoders. */
-  def main(args: Array[String]): Unit = {
-    (2 to 5).foreach { i =>
-      val types = (1 to i).map(t => s"T$t").mkString(", ")
-      val tupleType = s"($types)"
-      val args = (1 to i).map(t => s"e$t: Encoder[T$t]").mkString(", ")
-      val fields = (1 to i).map(t => s"""StructField("_$t", e$t.schema)""").mkString(", ")
-      val fromRow = (1 to i).map(t => s"e$t.fromRow(row)").mkString(", ")
-
-      println(
-        s"""
-          |class Tuple${i}Encoder[$types]($args) extends Encoder[$tupleType] {
-          |  val schema = StructType(Array($fields))
-          |
-          |  def clsTag: ClassTag[$tupleType] = scala.reflect.classTag[$tupleType]
-          |
-          |  def fromRow(row: InternalRow): $tupleType = {
-          |    ($fromRow)
-          |  }
-          |
-          |  override def toRow(t: $tupleType): InternalRow =
-          |    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
-          |
-          |  override def bind(schema: Seq[Attribute]): Encoder[$tupleType] = {
-          |    this
-          |  }
-          |
-          |  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[$tupleType] =
-          |    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-          |
-          |
-          |  override def bindOrdinals(schema: Seq[Attribute]): Encoder[$tupleType] =
-          |    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-          |}
-        """.stripMargin)
-    }
-  }
-}
-
-class Tuple2Encoder[T1, T2](e1: Encoder[T1], e2: Encoder[T2]) extends Encoder[(T1, T2)] {
-  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema)))
-
-  def clsTag: ClassTag[(T1, T2)] = scala.reflect.classTag[(T1, T2)]
-
-  def fromRow(row: InternalRow): (T1, T2) = {
-    (e1.fromRow(row), e2.fromRow(row))
-  }
-
-  override def toRow(t: (T1, T2)): InternalRow =
-    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
-
-  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2)] = {
-    this
-  }
-
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-}
-
-
-class Tuple3Encoder[T1, T2, T3](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3]) extends Encoder[(T1, T2, T3)] {
-  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema)))
-
-  def clsTag: ClassTag[(T1, T2, T3)] = scala.reflect.classTag[(T1, T2, T3)]
-
-  def fromRow(row: InternalRow): (T1, T2, T3) = {
-    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row))
-  }
-
-  override def toRow(t: (T1, T2, T3)): InternalRow =
-    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
-
-  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3)] = {
-    this
-  }
-
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-}
-
-
-class Tuple4Encoder[T1, T2, T3, T4](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4]) extends Encoder[(T1, T2, T3, T4)] {
-  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema), StructField("_4", e4.schema)))
-
-  def clsTag: ClassTag[(T1, T2, T3, T4)] = scala.reflect.classTag[(T1, T2, T3, T4)]
-
-  def fromRow(row: InternalRow): (T1, T2, T3, T4) = {
-    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row), e4.fromRow(row))
-  }
-
-  override def toRow(t: (T1, T2, T3, T4)): InternalRow =
-    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
-
-  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] = {
-    this
-  }
-
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-}
-
-
-class Tuple5Encoder[T1, T2, T3, T4, T5](e1: Encoder[T1], e2: Encoder[T2], e3: Encoder[T3], e4: Encoder[T4], e5: Encoder[T5]) extends Encoder[(T1, T2, T3, T4, T5)] {
-  val schema = StructType(Array(StructField("_1", e1.schema), StructField("_2", e2.schema), StructField("_3", e3.schema), StructField("_4", e4.schema), StructField("_5", e5.schema)))
-
-  def clsTag: ClassTag[(T1, T2, T3, T4, T5)] = scala.reflect.classTag[(T1, T2, T3, T4, T5)]
-
-  def fromRow(row: InternalRow): (T1, T2, T3, T4, T5) = {
-    (e1.fromRow(row), e2.fromRow(row), e3.fromRow(row), e4.fromRow(row), e5.fromRow(row))
-  }
-
-  override def toRow(t: (T1, T2, T3, T4, T5)): InternalRow =
-    throw new UnsupportedOperationException("Tuple Encoders only support fromRow.")
-
-  override def bind(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] = {
-    this
-  }
-
-  override def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-
-
-  override def bindOrdinals(schema: Seq[Attribute]): Encoder[(T1, T2, T3, T4, T5)] =
-    throw new UnsupportedOperationException("Tuple Encoders only support bind.")
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 21a55a537184..d2d3db0a4448 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.catalyst.plans.logical
 
-import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.Utils
 import org.apache.spark.sql.catalyst.plans._
@@ -450,8 +450,8 @@ case object OneRowRelation extends LeafNode {
  */
 case class MapPartitions[T, U](
     func: Iterator[T] => Iterator[U],
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     output: Seq[Attribute],
     child: LogicalPlan) extends UnaryNode {
   override def missingInput: AttributeSet = AttributeSet.empty
@@ -460,8 +460,8 @@ case class MapPartitions[T, U](
 /** Factory for constructing new `AppendColumn` nodes. */
 object AppendColumn {
   def apply[T : Encoder, U : Encoder](func: T => U, child: LogicalPlan): AppendColumn[T, U] = {
-    val attrs = implicitly[Encoder[U]].schema.toAttributes
-    new AppendColumn[T, U](func, implicitly[Encoder[T]], implicitly[Encoder[U]], attrs, child)
+    val attrs = encoderFor[U].schema.toAttributes
+    new AppendColumn[T, U](func, encoderFor[T], encoderFor[U], attrs, child)
   }
 }
 
@@ -472,8 +472,8 @@ object AppendColumn {
  */
 case class AppendColumn[T, U](
     func: T => U,
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     newColumns: Seq[Attribute],
     child: LogicalPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output ++ newColumns
@@ -488,11 +488,11 @@ object MapGroups {
       child: LogicalPlan): MapGroups[K, T, U] = {
     new MapGroups(
       func,
-      implicitly[Encoder[K]],
-      implicitly[Encoder[T]],
-      implicitly[Encoder[U]],
+      encoderFor[K],
+      encoderFor[T],
+      encoderFor[U],
       groupingAttributes,
-      implicitly[Encoder[U]].schema.toAttributes,
+      encoderFor[U].schema.toAttributes,
       child)
   }
 }
@@ -504,9 +504,9 @@ object MapGroups {
  */
 case class MapGroups[K, T, U](
     func: (K, Iterator[T]) => Iterator[U],
-    kEncoder: Encoder[K],
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    kEncoder: ExpressionEncoder[K],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     groupingAttributes: Seq[Attribute],
     output: Seq[Attribute],
     child: LogicalPlan) extends UnaryNode {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
similarity index 91%
rename from sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
rename to sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index 008d0bea8a94..a374da4da1f0 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -47,7 +47,16 @@ case class RepeatedData(
 
 case class SpecificCollection(l: List[Int])
 
-class ProductEncoderSuite extends SparkFunSuite {
+class ExpressionEncoderSuite extends SparkFunSuite {
+
+  encodeDecodeTest(1)
+  encodeDecodeTest(1L)
+  encodeDecodeTest(1.toDouble)
+  encodeDecodeTest(1.toFloat)
+  encodeDecodeTest(true)
+  encodeDecodeTest(false)
+  encodeDecodeTest(1.toShort)
+  encodeDecodeTest(1.toByte)
 
   encodeDecodeTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
 
@@ -210,24 +219,24 @@ class ProductEncoderSuite extends SparkFunSuite {
     { (l, r) => l._2.toString == r._2.toString }
 
   /** Simplified encodeDecodeTestCustom, where the comparison function can be `Object.equals`. */
-  protected def encodeDecodeTest[T <: Product : TypeTag](inputData: T) =
+  protected def encodeDecodeTest[T : TypeTag](inputData: T) =
     encodeDecodeTestCustom[T](inputData)((l, r) => l == r)
 
   /**
    * Constructs a test that round-trips `t` through an encoder, checking the results to ensure it
    * matches the original.
    */
-  protected def encodeDecodeTestCustom[T <: Product : TypeTag](
+  protected def encodeDecodeTestCustom[T : TypeTag](
       inputData: T)(
       c: (T, T) => Boolean) = {
-    test(s"encode/decode: $inputData") {
-      val encoder = try ProductEncoder[T] catch {
+    test(s"encode/decode: $inputData - ${inputData.getClass.getName}") {
+      val encoder = try ExpressionEncoder[T]() catch {
         case e: Exception =>
           fail(s"Exception thrown generating encoder", e)
       }
       val convertedData = encoder.toRow(inputData)
       val schema = encoder.schema.toAttributes
-      val boundEncoder = encoder.bind(schema)
+      val boundEncoder = encoder.resolve(schema).bind(schema)
       val convertedBack = try boundEncoder.fromRow(convertedData) catch {
         case e: Exception =>
           fail(
@@ -236,15 +245,19 @@ class ProductEncoderSuite extends SparkFunSuite {
               |Schema: ${schema.mkString(",")}
               |${encoder.schema.treeString}
               |
-              |Construct Expressions:
-              |${boundEncoder.constructExpression.treeString}
+              |Encoder:
+              |$boundEncoder
               |
             """.stripMargin, e)
       }
 
       if (!c(inputData, convertedBack)) {
-        val types =
-          convertedBack.productIterator.filter(_ != null).map(_.getClass.getName).mkString(",")
+        val types = convertedBack match {
+          case c: Product =>
+            c.productIterator.filter(_ != null).map(_.getClass.getName).mkString(",")
+          case other => other.getClass.getName
+        }
+
 
         val encodedData = try {
           convertedData.toSeq(encoder.schema).zip(encoder.schema).map {
@@ -269,11 +282,7 @@ class ProductEncoderSuite extends SparkFunSuite {
              |${encoder.schema.treeString}
              |
              |Extract Expressions:
-             |${boundEncoder.extractExpressions.map(_.treeString).mkString("\n")}
-             |
-             |Construct Expressions:
-             |${boundEncoder.constructExpression.treeString}
-             |
+             |$boundEncoder
          """.stripMargin)
         }
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 32d9b0b1d988..aa817a037ef5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -267,7 +267,7 @@ class DataFrame private[sql](
    * @since 1.6.0
    */
   @Experimental
-  def as[U : Encoder]: Dataset[U] = new Dataset[U](sqlContext, queryExecution)
+  def as[U : Encoder]: Dataset[U] = new Dataset[U](sqlContext, logicalPlan)
 
   /**
    * Returns a new [[DataFrame]] with columns renamed. This can be quite convenient in conversion
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 96213c763040..e0ab5f593e93 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -21,6 +21,7 @@ import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
 import org.apache.spark.sql.types.StructType
@@ -53,15 +54,21 @@ import org.apache.spark.sql.types.StructType
  * @since 1.6.0
  */
 @Experimental
-class Dataset[T] private[sql](
+class Dataset[T] private(
     @transient val sqlContext: SQLContext,
-    @transient val queryExecution: QueryExecution)(
-    implicit val encoder: Encoder[T]) extends Serializable {
+    @transient val queryExecution: QueryExecution,
+    unresolvedEncoder: Encoder[T]) extends Serializable {
+
+  /** The encoder for this [[Dataset]] that has been resolved to its output schema. */
+  private[sql] implicit val encoder: ExpressionEncoder[T] = unresolvedEncoder match {
+    case e: ExpressionEncoder[T] => e.resolve(queryExecution.analyzed.output)
+    case _ => throw new IllegalArgumentException("Only expression encoders are currently supported")
+  }
 
   private implicit def classTag = encoder.clsTag
 
   private[sql] def this(sqlContext: SQLContext, plan: LogicalPlan)(implicit encoder: Encoder[T]) =
-    this(sqlContext, new QueryExecution(sqlContext, plan))
+    this(sqlContext, new QueryExecution(sqlContext, plan), encoder)
 
   /** Returns the schema of the encoded form of the objects in this [[Dataset]]. */
   def schema: StructType = encoder.schema
@@ -76,7 +83,9 @@ class Dataset[T] private[sql](
    * TODO: document binding rules
    * @since 1.6.0
    */
-  def as[U : Encoder]: Dataset[U] = new Dataset(sqlContext, queryExecution)(implicitly[Encoder[U]])
+  def as[U : Encoder]: Dataset[U] = {
+    new Dataset(sqlContext, queryExecution, encoderFor[U])
+  }
 
   /**
    * Applies a logical alias to this [[Dataset]] that can be used to disambiguate columns that have
@@ -103,7 +112,7 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def rdd: RDD[T] = {
-    val tEnc = implicitly[Encoder[T]]
+    val tEnc = encoderFor[T]
     val input = queryExecution.analyzed.output
     queryExecution.toRdd.mapPartitions { iter =>
       val bound = tEnc.bind(input)
@@ -150,9 +159,9 @@ class Dataset[T] private[sql](
       sqlContext,
       MapPartitions[T, U](
         func,
-        implicitly[Encoder[T]],
-        implicitly[Encoder[U]],
-        implicitly[Encoder[U]].schema.toAttributes,
+        encoderFor[T],
+        encoderFor[U],
+        encoderFor[U].schema.toAttributes,
         logicalPlan))
   }
 
@@ -209,8 +218,8 @@ class Dataset[T] private[sql](
     val executed = sqlContext.executePlan(withGroupingKey)
 
     new GroupedDataset(
-      implicitly[Encoder[K]].bindOrdinals(withGroupingKey.newColumns),
-      implicitly[Encoder[T]].bind(inputPlan.output),
+      encoderFor[K].resolve(withGroupingKey.newColumns),
+      encoderFor[T].bind(inputPlan.output),
       executed,
       inputPlan.output,
       withGroupingKey.newColumns)
@@ -220,6 +229,18 @@ class Dataset[T] private[sql](
    *  Typed Relational  *
    * ****************** */
 
+  /**
+   * Selects a set of column based expressions.
+   * {{{
+   *   df.select($"colA", $"colB" + 1)
+   * }}}
+   * @group dfops
+   * @since 1.3.0
+   */
+  // Copied from Dataframe to make sure we don't have invalid overloads.
+  @scala.annotation.varargs
+  def select(cols: Column*): DataFrame = toDF().select(cols: _*)
+
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expression for each element.
    *
@@ -233,88 +254,64 @@ class Dataset[T] private[sql](
     new Dataset[U1](sqlContext, Project(Alias(c1.expr, "_1")() :: Nil, logicalPlan))
   }
 
-  // Codegen
-  // scalastyle:off
-
-  /** sbt scalaShell; println(Seq(1).toDS().genSelect) */
-  private def genSelect: String = {
-    (2 to 5).map { n =>
-      val types = (1 to n).map(i =>s"U$i").mkString(", ")
-      val args = (1 to n).map(i => s"c$i: TypedColumn[U$i]").mkString(", ")
-      val encoders = (1 to n).map(i => s"c$i.encoder").mkString(", ")
-      val schema = (1 to n).map(i => s"""Alias(c$i.expr, "_$i")()""").mkString(" :: ")
-      s"""
-         |/**
-         | * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
-         | * @since 1.6.0
-         | */
-         |def select[$types]($args): Dataset[($types)] = {
-         |  implicit val te = new Tuple${n}Encoder($encoders)
-         |  new Dataset[($types)](sqlContext,
-         |    Project(
-         |      $schema :: Nil,
-         |      logicalPlan))
-         |}
-         |
-       """.stripMargin
-    }.mkString("\n")
+  /**
+   * Internal helper function for building typed selects that return tuples.  For simplicity and
+   * code reuse, we do this without the help of the type system and then use helper functions
+   * that cast appropriately for the user facing interface.
+   */
+  protected def selectUntyped(columns: TypedColumn[_]*): Dataset[_] = {
+    val aliases = columns.zipWithIndex.map { case (c, i) => Alias(c.expr, s"_${i + 1}")() }
+    val unresolvedPlan = Project(aliases, logicalPlan)
+    val execution = new QueryExecution(sqlContext, unresolvedPlan)
+    // Rebind the encoders to the nested schema that will be produced by the select.
+    val encoders = columns.map(_.encoder.asInstanceOf[ExpressionEncoder[_]]).zip(aliases).map {
+      case (e: ExpressionEncoder[_], a) if !e.flat =>
+        e.nested(a.toAttribute).resolve(execution.analyzed.output)
+      case (e, a) =>
+        e.unbind(a.toAttribute :: Nil).resolve(execution.analyzed.output)
+    }
+    new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
   }
 
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
    */
-  def select[U1, U2](c1: TypedColumn[U1], c2: TypedColumn[U2]): Dataset[(U1, U2)] = {
-    implicit val te = new Tuple2Encoder(c1.encoder, c2.encoder)
-    new Dataset[(U1, U2)](sqlContext,
-      Project(
-        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Nil,
-        logicalPlan))
-  }
-
-
+  def select[U1, U2](c1: TypedColumn[U1], c2: TypedColumn[U2]): Dataset[(U1, U2)] =
+    selectUntyped(c1, c2).asInstanceOf[Dataset[(U1, U2)]]
 
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
    */
-  def select[U1, U2, U3](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3]): Dataset[(U1, U2, U3)] = {
-    implicit val te = new Tuple3Encoder(c1.encoder, c2.encoder, c3.encoder)
-    new Dataset[(U1, U2, U3)](sqlContext,
-      Project(
-        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Nil,
-        logicalPlan))
-  }
-
-
+  def select[U1, U2, U3](
+      c1: TypedColumn[U1],
+      c2: TypedColumn[U2],
+      c3: TypedColumn[U3]): Dataset[(U1, U2, U3)] =
+    selectUntyped(c1, c2, c3).asInstanceOf[Dataset[(U1, U2, U3)]]
 
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
    */
-  def select[U1, U2, U3, U4](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3], c4: TypedColumn[U4]): Dataset[(U1, U2, U3, U4)] = {
-    implicit val te = new Tuple4Encoder(c1.encoder, c2.encoder, c3.encoder, c4.encoder)
-    new Dataset[(U1, U2, U3, U4)](sqlContext,
-      Project(
-        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Alias(c4.expr, "_4")() :: Nil,
-        logicalPlan))
-  }
-
-
+  def select[U1, U2, U3, U4](
+      c1: TypedColumn[U1],
+      c2: TypedColumn[U2],
+      c3: TypedColumn[U3],
+      c4: TypedColumn[U4]): Dataset[(U1, U2, U3, U4)] =
+    selectUntyped(c1, c2, c3, c4).asInstanceOf[Dataset[(U1, U2, U3, U4)]]
 
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
    */
-  def select[U1, U2, U3, U4, U5](c1: TypedColumn[U1], c2: TypedColumn[U2], c3: TypedColumn[U3], c4: TypedColumn[U4], c5: TypedColumn[U5]): Dataset[(U1, U2, U3, U4, U5)] = {
-    implicit val te = new Tuple5Encoder(c1.encoder, c2.encoder, c3.encoder, c4.encoder, c5.encoder)
-    new Dataset[(U1, U2, U3, U4, U5)](sqlContext,
-      Project(
-        Alias(c1.expr, "_1")() :: Alias(c2.expr, "_2")() :: Alias(c3.expr, "_3")() :: Alias(c4.expr, "_4")() :: Alias(c5.expr, "_5")() :: Nil,
-        logicalPlan))
-  }
-
-  // scalastyle:on
+  def select[U1, U2, U3, U4, U5](
+      c1: TypedColumn[U1],
+      c2: TypedColumn[U2],
+      c3: TypedColumn[U3],
+      c4: TypedColumn[U4],
+      c5: TypedColumn[U5]): Dataset[(U1, U2, U3, U4, U5)] =
+    selectUntyped(c1, c2, c3, c4, c5).asInstanceOf[Dataset[(U1, U2, U3, U4, U5)]]
 
   /* **************** *
    *  Set operations  *
@@ -360,6 +357,48 @@ class Dataset[T] private[sql](
    */
   def subtract(other: Dataset[T]): Dataset[T] = withPlan[T](other)(Except)
 
+  /* ****** *
+   *  Joins *
+   * ****** */
+
+  /**
+   * Joins this [[Dataset]] returning a [[Tuple2]] for each pair where `condition` evaluates to
+   * true.
+   *
+   * This is similar to the relation `join` function with one important difference in the
+   * result schema. Since `joinWith` preserves objects present on either side of the join, the
+   * result schema is similarly nested into a tuple under the column names `_1` and `_2`.
+   *
+   * This type of join can be useful both for preserving type-safety with the original object
+   * types as well as working with relational data where either side of the join has column
+   * names in common.
+   */
+  def joinWith[U](other: Dataset[U], condition: Column): Dataset[(T, U)] = {
+    val left = this.logicalPlan
+    val right = other.logicalPlan
+
+    val leftData = this.encoder match {
+      case e if e.flat => Alias(left.output.head, "_1")()
+      case _ => Alias(CreateStruct(left.output), "_1")()
+    }
+    val rightData = other.encoder match {
+      case e if e.flat => Alias(right.output.head, "_2")()
+      case _ => Alias(CreateStruct(right.output), "_2")()
+    }
+    val leftEncoder =
+      if (encoder.flat) encoder else encoder.nested(leftData.toAttribute)
+    val rightEncoder =
+      if (other.encoder.flat) other.encoder else other.encoder.nested(rightData.toAttribute)
+    implicit val tuple2Encoder: Encoder[(T, U)] =
+      ExpressionEncoder.tuple(leftEncoder, rightEncoder)
+
+    withPlan[(T, U)](other) { (left, right) =>
+      Project(
+        leftData :: rightData :: Nil,
+        Join(left, right, Inner, Some(condition.expr)))
+    }
+  }
+
   /* ************************** *
    *  Gather to Driver Actions  *
    * ************************** */
@@ -380,13 +419,10 @@ class Dataset[T] private[sql](
   private[sql] def logicalPlan = queryExecution.analyzed
 
   private[sql] def withPlan(f: LogicalPlan => LogicalPlan): Dataset[T] =
-    new Dataset[T](sqlContext, sqlContext.executePlan(f(logicalPlan)))
+    new Dataset[T](sqlContext, sqlContext.executePlan(f(logicalPlan)), encoder)
 
   private[sql] def withPlan[R : Encoder](
       other: Dataset[_])(
       f: (LogicalPlan, LogicalPlan) => LogicalPlan): Dataset[R] =
-    new Dataset[R](
-      sqlContext,
-      sqlContext.executePlan(
-        f(logicalPlan, other.logicalPlan)))
+    new Dataset[R](sqlContext, f(logicalPlan, other.logicalPlan))
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 5e7198f97438..2cb94430e617 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -34,7 +34,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationEnd}
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.catalyst.analysis._
-import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.optimizer.{DefaultOptimizer, Optimizer}
@@ -491,7 +491,7 @@ class SQLContext private[sql](
 
 
   def createDataset[T : Encoder](data: Seq[T]): Dataset[T] = {
-    val enc = implicitly[Encoder[T]]
+    val enc = encoderFor[T]
     val attributes = enc.schema.toAttributes
     val encoded = data.map(d => enc.toRow(d).copy())
     val plan = new LocalRelation(attributes, encoded)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index af8474df0de8..f460a86414c4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -37,11 +37,16 @@ import org.apache.spark.unsafe.types.UTF8String
 abstract class SQLImplicits {
   protected def _sqlContext: SQLContext
 
-  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ProductEncoder[T]
+  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ExpressionEncoder[T]()
 
-  implicit def newIntEncoder: Encoder[Int] = new IntEncoder()
-  implicit def newLongEncoder: Encoder[Long] = new LongEncoder()
-  implicit def newStringEncoder: Encoder[String] = new StringEncoder()
+  implicit def newIntEncoder: Encoder[Int] = ExpressionEncoder[Int](flat = true)
+  implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
+  implicit def newDoubleEncoder: Encoder[Double] = ExpressionEncoder[Double](flat = true)
+  implicit def newFloatEncoder: Encoder[Float] = ExpressionEncoder[Float](flat = true)
+  implicit def newByteEncoder: Encoder[Byte] = ExpressionEncoder[Byte](flat = true)
+  implicit def newShortEncoder: Encoder[Short] = ExpressionEncoder[Short](flat = true)
+  implicit def newBooleanEncoder: Encoder[Boolean] = ExpressionEncoder[Boolean](flat = true)
+  implicit def newStringEncoder: Encoder[String] = ExpressionEncoder[String](flat = true)
 
   implicit def localSeqToDatasetHolder[T : Encoder](s: Seq[T]): DatasetHolder[T] = {
     DatasetHolder(_sqlContext.createDataset(s))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 2bb3dba5bd2b..89938471ee38 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.execution
 import org.apache.spark.rdd.{PartitionwiseSampledRDD, RDD, ShuffledRDD}
 import org.apache.spark.shuffle.sort.SortShuffleManager
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeRowJoiner
 import org.apache.spark.sql.catalyst.plans.physical._
@@ -319,8 +319,8 @@ case class OutputFaker(output: Seq[Attribute], child: SparkPlan) extends SparkPl
  */
 case class MapPartitions[T, U](
     func: Iterator[T] => Iterator[U],
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     output: Seq[Attribute],
     child: SparkPlan) extends UnaryNode {
 
@@ -337,8 +337,8 @@ case class MapPartitions[T, U](
  */
 case class AppendColumns[T, U](
     func: T => U,
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     newColumns: Seq[Attribute],
     child: SparkPlan) extends UnaryNode {
 
@@ -363,9 +363,9 @@ case class AppendColumns[T, U](
  */
 case class MapGroups[K, T, U](
     func: (K, Iterator[T]) => Iterator[U],
-    kEncoder: Encoder[K],
-    tEncoder: Encoder[T],
-    uEncoder: Encoder[U],
+    kEncoder: ExpressionEncoder[K],
+    tEncoder: ExpressionEncoder[T],
+    uEncoder: ExpressionEncoder[U],
     groupingAttributes: Seq[Attribute],
     output: Seq[Attribute],
     child: SparkPlan) extends UnaryNode {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 08496249c60c..aebb390a1d15 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -34,6 +34,13 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       data: _*)
   }
 
+  test("as tuple") {
+    val data = Seq(("a", 1), ("b", 2)).toDF("a", "b")
+    checkAnswer(
+      data.as[(String, Int)],
+      ("a", 1), ("b", 2))
+  }
+
   test("as case class / collect") {
     val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDF("a", "b").as[ClassData]
     checkAnswer(
@@ -61,14 +68,40 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       2, 3, 4)
   }
 
-  test("select 3") {
+  test("select 2") {
     val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
     checkAnswer(
       ds.select(
         expr("_1").as[String],
-        expr("_2").as[Int],
-        expr("_2 + 1").as[Int]),
-      ("a", 1, 2), ("b", 2, 3), ("c", 3, 4))
+        expr("_2").as[Int]) : Dataset[(String, Int)],
+      ("a", 1), ("b", 2), ("c", 3))
+  }
+
+  test("select 2, primitive and tuple") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.select(
+        expr("_1").as[String],
+        expr("struct(_2, _2)").as[(Int, Int)]),
+      ("a", (1, 1)), ("b", (2, 2)), ("c", (3, 3)))
+  }
+
+  test("select 2, primitive and class") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkAnswer(
+      ds.select(
+        expr("_1").as[String],
+        expr("named_struct('a', _1, 'b', _2)").as[ClassData]),
+      ("a", ClassData("a", 1)), ("b", ClassData("b", 2)), ("c", ClassData("c", 3)))
+  }
+
+  test("select 2, primitive and class, fields reordered") {
+    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
+    checkDecoding(
+      ds.select(
+        expr("_1").as[String],
+        expr("named_struct('b', _2, 'a', _1)").as[ClassData]),
+      ("a", ClassData("a", 1)), ("b", ClassData("b", 2)), ("c", ClassData("c", 3)))
   }
 
   test("filter") {
@@ -102,6 +135,54 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     assert(ds.fold(("", 0))((a, b) => ("sum", a._2 + b._2)) == ("sum", 6))
   }
 
+  test("joinWith, flat schema") {
+    val ds1 = Seq(1, 2, 3).toDS().as("a")
+    val ds2 = Seq(1, 2).toDS().as("b")
+
+    checkAnswer(
+      ds1.joinWith(ds2, $"a.value" === $"b.value"),
+      (1, 1), (2, 2))
+  }
+
+  test("joinWith, expression condition") {
+    val ds1 = Seq(ClassData("a", 1), ClassData("b", 2)).toDS()
+    val ds2 = Seq(("a", 1), ("b", 2)).toDS()
+
+    checkAnswer(
+      ds1.joinWith(ds2, $"_1" === $"a"),
+      (ClassData("a", 1), ("a", 1)), (ClassData("b", 2), ("b", 2)))
+  }
+
+  test("joinWith tuple with primitive, expression") {
+    val ds1 = Seq(1, 1, 2).toDS()
+    val ds2 = Seq(("a", 1), ("b", 2)).toDS()
+
+    checkAnswer(
+      ds1.joinWith(ds2, $"value" === $"_2"),
+      (1, ("a", 1)), (1, ("a", 1)), (2, ("b", 2)))
+  }
+
+  test("joinWith class with primitive, toDF") {
+    val ds1 = Seq(1, 1, 2).toDS()
+    val ds2 = Seq(ClassData("a", 1), ClassData("b", 2)).toDS()
+
+    checkAnswer(
+      ds1.joinWith(ds2, $"value" === $"b").toDF().select($"_1", $"_2.a", $"_2.b"),
+      Row(1, "a", 1) :: Row(1, "a", 1) :: Row(2, "b", 2) :: Nil)
+  }
+
+  test("multi-level joinWith") {
+    val ds1 = Seq(("a", 1), ("b", 2)).toDS().as("a")
+    val ds2 = Seq(("a", 1), ("b", 2)).toDS().as("b")
+    val ds3 = Seq(("a", 1), ("b", 2)).toDS().as("c")
+
+    checkAnswer(
+      ds1.joinWith(ds2, $"a._2" === $"b._2").as("ab").joinWith(ds3, $"ab._1._2" === $"c._2"),
+      ((("a", 1), ("a", 1)), ("a", 1)),
+      ((("b", 2), ("b", 2)), ("b", 2)))
+
+  }
+
   test("groupBy function, keys") {
     val ds = Seq(("a", 1), ("b", 1)).toDS()
     val grouped = ds.groupBy(v => (1, v._2))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index aba567512fe3..73e02eb0d957 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -20,12 +20,11 @@ package org.apache.spark.sql
 import java.util.{Locale, TimeZone}
 
 import scala.collection.JavaConverters._
-import scala.reflect.runtime.universe._
 
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.columnar.InMemoryRelation
-import org.apache.spark.sql.catalyst.encoders.{ProductEncoder, Encoder}
+import org.apache.spark.sql.catalyst.encoders.Encoder
 
 abstract class QueryTest extends PlanTest {
 
@@ -55,10 +54,49 @@ abstract class QueryTest extends PlanTest {
     }
   }
 
-  protected def checkAnswer[T : Encoder](ds: => Dataset[T], expectedAnswer: T*): Unit = {
+  /**
+   * Evaluates a dataset to make sure that the result of calling collect matches the given
+   * expected answer.
+   *  - Special handling is done based on whether the query plan should be expected to return
+   *    the results in sorted order.
+   *  - This function also checks to make sure that the schema for serializing the expected answer
+   *    matches that produced by the dataset (i.e. does manual construction of object match
+   *    the constructed encoder for cases like joins, etc).  Note that this means that it will fail
+   *    for cases where reordering is done on fields.  For such tests, user `checkDecoding` instead
+   *    which performs a subset of the checks done by this function.
+   */
+  protected def checkAnswer[T : Encoder](
+      ds: => Dataset[T],
+      expectedAnswer: T*): Unit = {
     checkAnswer(
       ds.toDF(),
       sqlContext.createDataset(expectedAnswer).toDF().collect().toSeq)
+
+    checkDecoding(ds, expectedAnswer: _*)
+  }
+
+  protected def checkDecoding[T](
+      ds: => Dataset[T],
+      expectedAnswer: T*): Unit = {
+    val decoded = try ds.collect().toSet catch {
+      case e: Exception =>
+        fail(
+          s"""
+             |Exception collecting dataset as objects
+             |${ds.encoder}
+             |${ds.encoder.constructExpression.treeString}
+             |${ds.queryExecution}
+           """.stripMargin, e)
+    }
+
+    if (decoded != expectedAnswer.toSet) {
+      fail(
+        s"""Decoded objects do not match expected objects:
+           |Expected: ${expectedAnswer.toSet.toSeq.map((a: Any) => a.toString).sorted}
+            |Actual ${decoded.toSet.toSeq.map((a: Any) => a.toString).sorted}
+            |${ds.encoder.constructExpression.treeString}
+         """.stripMargin)
+    }
   }
 
   /**

From 9dba5fb2b59174cefde5b62a5c892fe5925bea38 Mon Sep 17 00:00:00 2001
From: vectorijk <jiangkai@gmail.com>
Date: Tue, 27 Oct 2015 13:55:03 -0700
Subject: [PATCH 383/896] [SPARK-10024][PYSPARK] Python API RF and GBT related
 params clear up

implement {RandomForest, GBT, TreeEnsemble, TreeClassifier, TreeRegressor}Params for Python API
in pyspark/ml/{classification, regression}.py

Author: vectorijk <jiangkai@gmail.com>

Closes #9233 from vectorijk/spark-10024.
---
 python/pyspark/ml/classification.py | 182 +++-------------
 python/pyspark/ml/regression.py     | 324 ++++++++++++----------------
 2 files changed, 168 insertions(+), 338 deletions(-)

diff --git a/python/pyspark/ml/classification.py b/python/pyspark/ml/classification.py
index 88815e561f57..4cbe7fbd482d 100644
--- a/python/pyspark/ml/classification.py
+++ b/python/pyspark/ml/classification.py
@@ -19,7 +19,7 @@
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
 from pyspark.ml.param.shared import *
 from pyspark.ml.regression import (
-    RandomForestParams, DecisionTreeModel, TreeEnsembleModels)
+    RandomForestParams, TreeEnsembleParams, DecisionTreeModel, TreeEnsembleModels)
 from pyspark.mllib.common import inherit_doc
 
 
@@ -205,8 +205,34 @@ class TreeClassifierParams(object):
     """
     supportedImpurities = ["entropy", "gini"]
 
+    # a placeholder to make it appear in the generated doc
+    impurity = Param(Params._dummy(), "impurity",
+                     "Criterion used for information gain calculation (case-insensitive). " +
+                     "Supported options: " +
+                     ", ".join(supportedImpurities))
+
+    def __init__(self):
+        super(TreeClassifierParams, self).__init__()
+        #: param for Criterion used for information gain calculation (case-insensitive).
+        self.impurity = Param(self, "impurity", "Criterion used for information " +
+                              "gain calculation (case-insensitive). Supported options: " +
+                              ", ".join(self.supportedImpurities))
+
+    def setImpurity(self, value):
+        """
+        Sets the value of :py:attr:`impurity`.
+        """
+        self._paramMap[self.impurity] = value
+        return self
 
-class GBTParams(object):
+    def getImpurity(self):
+        """
+        Gets the value of impurity or its default value.
+        """
+        return self.getOrDefault(self.impurity)
+
+
+class GBTParams(TreeEnsembleParams):
     """
     Private class to track supported GBT params.
     """
@@ -216,7 +242,7 @@ class GBTParams(object):
 @inherit_doc
 class DecisionTreeClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
                              HasProbabilityCol, HasRawPredictionCol, DecisionTreeParams,
-                             HasCheckpointInterval):
+                             TreeClassifierParams, HasCheckpointInterval):
     """
     `http://en.wikipedia.org/wiki/Decision_tree_learning Decision tree`
     learning algorithm for classification.
@@ -250,11 +276,6 @@ class DecisionTreeClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPred
     1.0
     """
 
-    # a placeholder to make it appear in the generated doc
-    impurity = Param(Params._dummy(), "impurity",
-                     "Criterion used for information gain calculation (case-insensitive). " +
-                     "Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
-
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  probabilityCol="probability", rawPredictionCol="rawPrediction",
@@ -269,11 +290,6 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         super(DecisionTreeClassifier, self).__init__()
         self._java_obj = self._new_java_obj(
             "org.apache.spark.ml.classification.DecisionTreeClassifier", self.uid)
-        #: param for Criterion used for information gain calculation (case-insensitive).
-        self.impurity = \
-            Param(self, "impurity",
-                  "Criterion used for information gain calculation (case-insensitive). " +
-                  "Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                          maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
                          impurity="gini")
@@ -299,19 +315,6 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return DecisionTreeClassificationModel(java_model)
 
-    def setImpurity(self, value):
-        """
-        Sets the value of :py:attr:`impurity`.
-        """
-        self._paramMap[self.impurity] = value
-        return self
-
-    def getImpurity(self):
-        """
-        Gets the value of impurity or its default value.
-        """
-        return self.getOrDefault(self.impurity)
-
 
 @inherit_doc
 class DecisionTreeClassificationModel(DecisionTreeModel):
@@ -323,7 +326,7 @@ class DecisionTreeClassificationModel(DecisionTreeModel):
 @inherit_doc
 class RandomForestClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasSeed,
                              HasRawPredictionCol, HasProbabilityCol,
-                             DecisionTreeParams, HasCheckpointInterval):
+                             RandomForestParams, TreeClassifierParams, HasCheckpointInterval):
     """
     `http://en.wikipedia.org/wiki/Random_forest  Random Forest`
     learning algorithm for classification.
@@ -357,19 +360,6 @@ class RandomForestClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPred
     1.0
     """
 
-    # a placeholder to make it appear in the generated doc
-    impurity = Param(Params._dummy(), "impurity",
-                     "Criterion used for information gain calculation (case-insensitive). " +
-                     "Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
-    subsamplingRate = Param(Params._dummy(), "subsamplingRate",
-                            "Fraction of the training data used for learning each decision tree, " +
-                            "in range (0, 1].")
-    numTrees = Param(Params._dummy(), "numTrees", "Number of trees to train (>= 1)")
-    featureSubsetStrategy = \
-        Param(Params._dummy(), "featureSubsetStrategy",
-              "The number of features to consider for splits at each tree node. Supported " +
-              "options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
-
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  probabilityCol="probability", rawPredictionCol="rawPrediction",
@@ -386,23 +376,6 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         super(RandomForestClassifier, self).__init__()
         self._java_obj = self._new_java_obj(
             "org.apache.spark.ml.classification.RandomForestClassifier", self.uid)
-        #: param for Criterion used for information gain calculation (case-insensitive).
-        self.impurity = \
-            Param(self, "impurity",
-                  "Criterion used for information gain calculation (case-insensitive). " +
-                  "Supported options: " + ", ".join(TreeClassifierParams.supportedImpurities))
-        #: param for Fraction of the training data used for learning each decision tree,
-        #  in range (0, 1]
-        self.subsamplingRate = Param(self, "subsamplingRate",
-                                     "Fraction of the training data used for learning each " +
-                                     "decision tree, in range (0, 1].")
-        #: param for Number of trees to train (>= 1)
-        self.numTrees = Param(self, "numTrees", "Number of trees to train (>= 1)")
-        #: param for The number of features to consider for splits at each tree node
-        self.featureSubsetStrategy = \
-            Param(self, "featureSubsetStrategy",
-                  "The number of features to consider for splits at each tree node. Supported " +
-                  "options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                          maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
                          impurity="gini", numTrees=20, featureSubsetStrategy="auto")
@@ -429,58 +402,6 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return RandomForestClassificationModel(java_model)
 
-    def setImpurity(self, value):
-        """
-        Sets the value of :py:attr:`impurity`.
-        """
-        self._paramMap[self.impurity] = value
-        return self
-
-    def getImpurity(self):
-        """
-        Gets the value of impurity or its default value.
-        """
-        return self.getOrDefault(self.impurity)
-
-    def setSubsamplingRate(self, value):
-        """
-        Sets the value of :py:attr:`subsamplingRate`.
-        """
-        self._paramMap[self.subsamplingRate] = value
-        return self
-
-    def getSubsamplingRate(self):
-        """
-        Gets the value of subsamplingRate or its default value.
-        """
-        return self.getOrDefault(self.subsamplingRate)
-
-    def setNumTrees(self, value):
-        """
-        Sets the value of :py:attr:`numTrees`.
-        """
-        self._paramMap[self.numTrees] = value
-        return self
-
-    def getNumTrees(self):
-        """
-        Gets the value of numTrees or its default value.
-        """
-        return self.getOrDefault(self.numTrees)
-
-    def setFeatureSubsetStrategy(self, value):
-        """
-        Sets the value of :py:attr:`featureSubsetStrategy`.
-        """
-        self._paramMap[self.featureSubsetStrategy] = value
-        return self
-
-    def getFeatureSubsetStrategy(self):
-        """
-        Gets the value of featureSubsetStrategy or its default value.
-        """
-        return self.getOrDefault(self.featureSubsetStrategy)
-
 
 class RandomForestClassificationModel(TreeEnsembleModels):
     """
@@ -490,7 +411,7 @@ class RandomForestClassificationModel(TreeEnsembleModels):
 
 @inherit_doc
 class GBTClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
-                    DecisionTreeParams, HasCheckpointInterval):
+                    GBTParams, HasCheckpointInterval, HasStepSize, HasSeed):
     """
     `http://en.wikipedia.org/wiki/Gradient_boosting Gradient-Boosted Trees (GBTs)`
     learning algorithm for classification.
@@ -522,12 +443,6 @@ class GBTClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol
     lossType = Param(Params._dummy(), "lossType",
                      "Loss function which GBT tries to minimize (case-insensitive). " +
                      "Supported options: " + ", ".join(GBTParams.supportedLossTypes))
-    subsamplingRate = Param(Params._dummy(), "subsamplingRate",
-                            "Fraction of the training data used for learning each decision tree, " +
-                            "in range (0, 1].")
-    stepSize = Param(Params._dummy(), "stepSize",
-                     "Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the " +
-                     "contribution of each estimator")
 
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
@@ -547,15 +462,6 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.lossType = Param(self, "lossType",
                               "Loss function which GBT tries to minimize (case-insensitive). " +
                               "Supported options: " + ", ".join(GBTParams.supportedLossTypes))
-        #: Fraction of the training data used for learning each decision tree, in range (0, 1].
-        self.subsamplingRate = Param(self, "subsamplingRate",
-                                     "Fraction of the training data used for learning each " +
-                                     "decision tree, in range (0, 1].")
-        #: Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the contribution of
-        #  each estimator
-        self.stepSize = Param(self, "stepSize",
-                              "Step size (a.k.a. learning rate) in interval (0, 1] for shrinking " +
-                              "the contribution of each estimator")
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                          maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
                          lossType="logistic", maxIter=20, stepSize=0.1)
@@ -593,32 +499,6 @@ def getLossType(self):
         """
         return self.getOrDefault(self.lossType)
 
-    def setSubsamplingRate(self, value):
-        """
-        Sets the value of :py:attr:`subsamplingRate`.
-        """
-        self._paramMap[self.subsamplingRate] = value
-        return self
-
-    def getSubsamplingRate(self):
-        """
-        Gets the value of subsamplingRate or its default value.
-        """
-        return self.getOrDefault(self.subsamplingRate)
-
-    def setStepSize(self, value):
-        """
-        Sets the value of :py:attr:`stepSize`.
-        """
-        self._paramMap[self.stepSize] = value
-        return self
-
-    def getStepSize(self):
-        """
-        Gets the value of stepSize or its default value.
-        """
-        return self.getOrDefault(self.stepSize)
-
 
 class GBTClassificationModel(TreeEnsembleModels):
     """
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index eb5f4bd6d70b..eeb18b3e9d29 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -260,21 +260,127 @@ def predictions(self):
         return self._call_java("predictions")
 
 
-class TreeRegressorParams(object):
+class TreeEnsembleParams(DecisionTreeParams):
+    """
+    Mixin for Decision Tree-based ensemble algorithms parameters.
+    """
+
+    # a placeholder to make it appear in the generated doc
+    subsamplingRate = Param(Params._dummy(), "subsamplingRate", "Fraction of the training data " +
+                            "used for learning each decision tree, in range (0, 1].")
+
+    def __init__(self):
+        super(TreeEnsembleParams, self).__init__()
+        #: param for Fraction of the training data, in range (0, 1].
+        self.subsamplingRate = Param(self, "subsamplingRate", "Fraction of the training data " +
+                                     "used for learning each decision tree, in range (0, 1].")
+
+    @since("1.4.0")
+    def setSubsamplingRate(self, value):
+        """
+        Sets the value of :py:attr:`subsamplingRate`.
+        """
+        self._paramMap[self.subsamplingRate] = value
+        return self
+
+    @since("1.4.0")
+    def getSubsamplingRate(self):
+        """
+        Gets the value of subsamplingRate or its default value.
+        """
+        return self.getOrDefault(self.subsamplingRate)
+
+
+class TreeRegressorParams(Params):
     """
     Private class to track supported impurity measures.
     """
+
     supportedImpurities = ["variance"]
+    # a placeholder to make it appear in the generated doc
+    impurity = Param(Params._dummy(), "impurity",
+                     "Criterion used for information gain calculation (case-insensitive). " +
+                     "Supported options: " +
+                     ", ".join(supportedImpurities))
 
+    def __init__(self):
+        super(TreeRegressorParams, self).__init__()
+        #: param for Criterion used for information gain calculation (case-insensitive).
+        self.impurity = Param(self, "impurity", "Criterion used for information " +
+                              "gain calculation (case-insensitive). Supported options: " +
+                              ", ".join(self.supportedImpurities))
 
-class RandomForestParams(object):
+    @since("1.4.0")
+    def setImpurity(self, value):
+        """
+        Sets the value of :py:attr:`impurity`.
+        """
+        self._paramMap[self.impurity] = value
+        return self
+
+    @since("1.4.0")
+    def getImpurity(self):
+        """
+        Gets the value of impurity or its default value.
+        """
+        return self.getOrDefault(self.impurity)
+
+
+class RandomForestParams(TreeEnsembleParams):
     """
     Private class to track supported random forest parameters.
     """
+
     supportedFeatureSubsetStrategies = ["auto", "all", "onethird", "sqrt", "log2"]
+    # a placeholder to make it appear in the generated doc
+    numTrees = Param(Params._dummy(), "numTrees", "Number of trees to train (>= 1).")
+    featureSubsetStrategy = \
+        Param(Params._dummy(), "featureSubsetStrategy",
+              "The number of features to consider for splits at each tree node. Supported " +
+              "options: " + ", ".join(supportedFeatureSubsetStrategies))
+
+    def __init__(self):
+        super(RandomForestParams, self).__init__()
+        #: param for Number of trees to train (>= 1).
+        self.numTrees = Param(self, "numTrees", "Number of trees to train (>= 1).")
+        #: param for The number of features to consider for splits at each tree node.
+        self.featureSubsetStrategy = \
+            Param(self, "featureSubsetStrategy",
+                  "The number of features to consider for splits at each tree node. Supported " +
+                  "options: " + ", ".join(self.supportedFeatureSubsetStrategies))
+
+    @since("1.4.0")
+    def setNumTrees(self, value):
+        """
+        Sets the value of :py:attr:`numTrees`.
+        """
+        self._paramMap[self.numTrees] = value
+        return self
+
+    @since("1.4.0")
+    def getNumTrees(self):
+        """
+        Gets the value of numTrees or its default value.
+        """
+        return self.getOrDefault(self.numTrees)
 
+    @since("1.4.0")
+    def setFeatureSubsetStrategy(self, value):
+        """
+        Sets the value of :py:attr:`featureSubsetStrategy`.
+        """
+        self._paramMap[self.featureSubsetStrategy] = value
+        return self
 
-class GBTParams(object):
+    @since("1.4.0")
+    def getFeatureSubsetStrategy(self):
+        """
+        Gets the value of featureSubsetStrategy or its default value.
+        """
+        return self.getOrDefault(self.featureSubsetStrategy)
+
+
+class GBTParams(TreeEnsembleParams):
     """
     Private class to track supported GBT params.
     """
@@ -283,7 +389,7 @@ class GBTParams(object):
 
 @inherit_doc
 class DecisionTreeRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
-                            DecisionTreeParams, HasCheckpointInterval):
+                            DecisionTreeParams, TreeRegressorParams, HasCheckpointInterval):
     """
     `http://en.wikipedia.org/wiki/Decision_tree_learning Decision tree`
     learning algorithm for regression.
@@ -309,11 +415,6 @@ class DecisionTreeRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredi
     .. versionadded:: 1.4.0
     """
 
-    # a placeholder to make it appear in the generated doc
-    impurity = Param(Params._dummy(), "impurity",
-                     "Criterion used for information gain calculation (case-insensitive). " +
-                     "Supported options: " + ", ".join(TreeRegressorParams.supportedImpurities))
-
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
@@ -326,11 +427,6 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         super(DecisionTreeRegressor, self).__init__()
         self._java_obj = self._new_java_obj(
             "org.apache.spark.ml.regression.DecisionTreeRegressor", self.uid)
-        #: param for Criterion used for information gain calculation (case-insensitive).
-        self.impurity = \
-            Param(self, "impurity",
-                  "Criterion used for information gain calculation (case-insensitive). " +
-                  "Supported options: " + ", ".join(TreeRegressorParams.supportedImpurities))
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                          maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
                          impurity="variance")
@@ -355,21 +451,6 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return DecisionTreeRegressionModel(java_model)
 
-    @since("1.4.0")
-    def setImpurity(self, value):
-        """
-        Sets the value of :py:attr:`impurity`.
-        """
-        self._paramMap[self.impurity] = value
-        return self
-
-    @since("1.4.0")
-    def getImpurity(self):
-        """
-        Gets the value of impurity or its default value.
-        """
-        return self.getOrDefault(self.impurity)
-
 
 @inherit_doc
 class DecisionTreeModel(JavaModel):
@@ -422,7 +503,7 @@ class DecisionTreeRegressionModel(DecisionTreeModel):
 
 @inherit_doc
 class RandomForestRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasSeed,
-                            DecisionTreeParams, HasCheckpointInterval):
+                            RandomForestParams, TreeRegressorParams, HasCheckpointInterval):
     """
     `http://en.wikipedia.org/wiki/Random_forest  Random Forest`
     learning algorithm for regression.
@@ -447,54 +528,26 @@ class RandomForestRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredi
     .. versionadded:: 1.4.0
     """
 
-    # a placeholder to make it appear in the generated doc
-    impurity = Param(Params._dummy(), "impurity",
-                     "Criterion used for information gain calculation (case-insensitive). " +
-                     "Supported options: " + ", ".join(TreeRegressorParams.supportedImpurities))
-    subsamplingRate = Param(Params._dummy(), "subsamplingRate",
-                            "Fraction of the training data used for learning each decision tree, " +
-                            "in range (0, 1].")
-    numTrees = Param(Params._dummy(), "numTrees", "Number of trees to train (>= 1)")
-    featureSubsetStrategy = \
-        Param(Params._dummy(), "featureSubsetStrategy",
-              "The number of features to consider for splits at each tree node. Supported " +
-              "options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
-
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                 maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, impurity="variance",
-                 numTrees=20, featureSubsetStrategy="auto", seed=None):
+                 maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
+                 impurity="variance", subsamplingRate=1.0, seed=None, numTrees=20,
+                 featureSubsetStrategy="auto"):
         """
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
-                 impurity="variance", numTrees=20, \
-                 featureSubsetStrategy="auto", seed=None)
+                 impurity="variance", subsamplingRate=1.0, seed=None, numTrees=20, \
+                 featureSubsetStrategy="auto")
         """
         super(RandomForestRegressor, self).__init__()
         self._java_obj = self._new_java_obj(
             "org.apache.spark.ml.regression.RandomForestRegressor", self.uid)
-        #: param for Criterion used for information gain calculation (case-insensitive).
-        self.impurity = \
-            Param(self, "impurity",
-                  "Criterion used for information gain calculation (case-insensitive). " +
-                  "Supported options: " + ", ".join(TreeRegressorParams.supportedImpurities))
-        #: param for Fraction of the training data used for learning each decision tree,
-        #  in range (0, 1]
-        self.subsamplingRate = Param(self, "subsamplingRate",
-                                     "Fraction of the training data used for learning each " +
-                                     "decision tree, in range (0, 1].")
-        #: param for Number of trees to train (>= 1)
-        self.numTrees = Param(self, "numTrees", "Number of trees to train (>= 1)")
-        #: param for The number of features to consider for splits at each tree node
-        self.featureSubsetStrategy = \
-            Param(self, "featureSubsetStrategy",
-                  "The number of features to consider for splits at each tree node. Supported " +
-                  "options: " + ", ".join(RandomForestParams.supportedFeatureSubsetStrategies))
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                         maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
-                         impurity="variance", numTrees=20, featureSubsetStrategy="auto")
+                         maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
+                         impurity="variance", subsamplingRate=1.0, seed=None, numTrees=20,
+                         featureSubsetStrategy="auto")
         kwargs = self.__init__._input_kwargs
         self.setParams(**kwargs)
 
@@ -502,13 +555,15 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
     @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None,
-                  impurity="variance", numTrees=20, featureSubsetStrategy="auto"):
+                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
+                  impurity="variance", subsamplingRate=1.0, seed=None, numTrees=20,
+                  featureSubsetStrategy="auto"):
         """
         setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
-                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, seed=None, \
-                  impurity="variance", numTrees=20, featureSubsetStrategy="auto")
+                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
+                  impurity="variance", subsamplingRate=1.0, seed=None, numTrees=20, \
+                  featureSubsetStrategy="auto")
         Sets params for linear regression.
         """
         kwargs = self.setParams._input_kwargs
@@ -517,66 +572,6 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return RandomForestRegressionModel(java_model)
 
-    @since("1.4.0")
-    def setImpurity(self, value):
-        """
-        Sets the value of :py:attr:`impurity`.
-        """
-        self._paramMap[self.impurity] = value
-        return self
-
-    @since("1.4.0")
-    def getImpurity(self):
-        """
-        Gets the value of impurity or its default value.
-        """
-        return self.getOrDefault(self.impurity)
-
-    @since("1.4.0")
-    def setSubsamplingRate(self, value):
-        """
-        Sets the value of :py:attr:`subsamplingRate`.
-        """
-        self._paramMap[self.subsamplingRate] = value
-        return self
-
-    @since("1.4.0")
-    def getSubsamplingRate(self):
-        """
-        Gets the value of subsamplingRate or its default value.
-        """
-        return self.getOrDefault(self.subsamplingRate)
-
-    @since("1.4.0")
-    def setNumTrees(self, value):
-        """
-        Sets the value of :py:attr:`numTrees`.
-        """
-        self._paramMap[self.numTrees] = value
-        return self
-
-    @since("1.4.0")
-    def getNumTrees(self):
-        """
-        Gets the value of numTrees or its default value.
-        """
-        return self.getOrDefault(self.numTrees)
-
-    @since("1.4.0")
-    def setFeatureSubsetStrategy(self, value):
-        """
-        Sets the value of :py:attr:`featureSubsetStrategy`.
-        """
-        self._paramMap[self.featureSubsetStrategy] = value
-        return self
-
-    @since("1.4.0")
-    def getFeatureSubsetStrategy(self):
-        """
-        Gets the value of featureSubsetStrategy or its default value.
-        """
-        return self.getOrDefault(self.featureSubsetStrategy)
-
 
 class RandomForestRegressionModel(TreeEnsembleModels):
     """
@@ -588,7 +583,7 @@ class RandomForestRegressionModel(TreeEnsembleModels):
 
 @inherit_doc
 class GBTRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
-                   DecisionTreeParams, HasCheckpointInterval):
+                   GBTParams, HasCheckpointInterval, HasStepSize, HasSeed):
     """
     `http://en.wikipedia.org/wiki/Gradient_boosting Gradient-Boosted Trees (GBTs)`
     learning algorithm for regression.
@@ -617,23 +612,17 @@ class GBTRegressor(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol,
     lossType = Param(Params._dummy(), "lossType",
                      "Loss function which GBT tries to minimize (case-insensitive). " +
                      "Supported options: " + ", ".join(GBTParams.supportedLossTypes))
-    subsamplingRate = Param(Params._dummy(), "subsamplingRate",
-                            "Fraction of the training data used for learning each decision tree, " +
-                            "in range (0, 1].")
-    stepSize = Param(Params._dummy(), "stepSize",
-                     "Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the " +
-                     "contribution of each estimator")
 
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                 maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, lossType="squared",
-                 maxIter=20, stepSize=0.1):
+                 maxMemoryInMB=256, cacheNodeIds=False, subsamplingRate=1.0,
+                 checkpointInterval=10, lossType="squared", maxIter=20, stepSize=0.1):
         """
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
-                 maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
-                 lossType="squared", maxIter=20, stepSize=0.1)
+                 maxMemoryInMB=256, cacheNodeIds=False, subsamplingRate=1.0, \
+                 checkpointInterval=10, lossType="squared", maxIter=20, stepSize=0.1)
         """
         super(GBTRegressor, self).__init__()
         self._java_obj = self._new_java_obj("org.apache.spark.ml.regression.GBTRegressor", self.uid)
@@ -641,18 +630,9 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.lossType = Param(self, "lossType",
                               "Loss function which GBT tries to minimize (case-insensitive). " +
                               "Supported options: " + ", ".join(GBTParams.supportedLossTypes))
-        #: Fraction of the training data used for learning each decision tree, in range (0, 1].
-        self.subsamplingRate = Param(self, "subsamplingRate",
-                                     "Fraction of the training data used for learning each " +
-                                     "decision tree, in range (0, 1].")
-        #: Step size (a.k.a. learning rate) in interval (0, 1] for shrinking the contribution of
-        #  each estimator
-        self.stepSize = Param(self, "stepSize",
-                              "Step size (a.k.a. learning rate) in interval (0, 1] for shrinking " +
-                              "the contribution of each estimator")
         self._setDefault(maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                         maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
-                         lossType="squared", maxIter=20, stepSize=0.1)
+                         maxMemoryInMB=256, cacheNodeIds=False, subsamplingRate=1.0,
+                         checkpointInterval=10, lossType="squared", maxIter=20, stepSize=0.1)
         kwargs = self.__init__._input_kwargs
         self.setParams(**kwargs)
 
@@ -660,13 +640,13 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
     @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
-                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
-                  lossType="squared", maxIter=20, stepSize=0.1):
+                  maxMemoryInMB=256, cacheNodeIds=False, subsamplingRate=1.0,
+                  checkpointInterval=10, lossType="squared", maxIter=20, stepSize=0.1):
         """
         setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0, \
-                  maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10, \
-                  lossType="squared", maxIter=20, stepSize=0.1)
+                  maxMemoryInMB=256, cacheNodeIds=False, subsamplingRate=1.0, \
+                  checkpointInterval=10, lossType="squared", maxIter=20, stepSize=0.1)
         Sets params for Gradient Boosted Tree Regression.
         """
         kwargs = self.setParams._input_kwargs
@@ -690,36 +670,6 @@ def getLossType(self):
         """
         return self.getOrDefault(self.lossType)
 
-    @since("1.4.0")
-    def setSubsamplingRate(self, value):
-        """
-        Sets the value of :py:attr:`subsamplingRate`.
-        """
-        self._paramMap[self.subsamplingRate] = value
-        return self
-
-    @since("1.4.0")
-    def getSubsamplingRate(self):
-        """
-        Gets the value of subsamplingRate or its default value.
-        """
-        return self.getOrDefault(self.subsamplingRate)
-
-    @since("1.4.0")
-    def setStepSize(self, value):
-        """
-        Sets the value of :py:attr:`stepSize`.
-        """
-        self._paramMap[self.stepSize] = value
-        return self
-
-    @since("1.4.0")
-    def getStepSize(self):
-        """
-        Gets the value of stepSize or its default value.
-        """
-        return self.getOrDefault(self.stepSize)
-
 
 class GBTRegressionModel(TreeEnsembleModels):
     """
@@ -783,7 +733,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  fitIntercept=True, maxIter=100, tol=1E-6, censorCol="censor", \
                  quantileProbabilities=[0.01, 0.05, 0.1, 0.25, 0.5, 0.75, 0.9, 0.95, 0.99], \
-                 quantilesCol=None):
+                 quantilesCol=None)
         """
         super(AFTSurvivalRegression, self).__init__()
         self._java_obj = self._new_java_obj(

From 4f030b9e82172659d250281782ac573cbd1438fc Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Tue, 27 Oct 2015 16:01:26 -0700
Subject: [PATCH 384/896] [SPARK-11324][STREAMING] Flag for closing Write Ahead
 Logs after a write

Currently the Write Ahead Log in Spark Streaming flushes data as writes need to be made. S3 does not support flushing of data, data is written once the stream is actually closed.
In case of failure, the data for the last minute (default rolling interval) will not be properly written. Therefore we need a flag to close the stream after the write, so that we achieve read after write consistency.

cc tdas zsxwing

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9285 from brkyvz/caw-wal.
---
 .../util/FileBasedWriteAheadLog.scala         |  6 +++-
 .../streaming/util/WriteAheadLogUtils.scala   | 15 ++++++++-
 .../streaming/util/WriteAheadLogSuite.scala   | 32 +++++++++++++++----
 3 files changed, 44 insertions(+), 9 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
index 9f4a4d6806ab..bc3f2486c21f 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
@@ -47,7 +47,8 @@ private[streaming] class FileBasedWriteAheadLog(
     logDirectory: String,
     hadoopConf: Configuration,
     rollingIntervalSecs: Int,
-    maxFailures: Int
+    maxFailures: Int,
+    closeFileAfterWrite: Boolean
   ) extends WriteAheadLog with Logging {
 
   import FileBasedWriteAheadLog._
@@ -80,6 +81,9 @@ private[streaming] class FileBasedWriteAheadLog(
     while (!succeeded && failures < maxFailures) {
       try {
         fileSegment = getLogWriter(time).write(byteBuffer)
+        if (closeFileAfterWrite) {
+          resetWriter()
+        }
         succeeded = true
       } catch {
         case ex: Exception =>
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
index 7f6ff12c58d4..0ea970e61b69 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
@@ -31,11 +31,15 @@ private[streaming] object WriteAheadLogUtils extends Logging {
   val RECEIVER_WAL_ROLLING_INTERVAL_CONF_KEY =
     "spark.streaming.receiver.writeAheadLog.rollingIntervalSecs"
   val RECEIVER_WAL_MAX_FAILURES_CONF_KEY = "spark.streaming.receiver.writeAheadLog.maxFailures"
+  val RECEIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY =
+    "spark.streaming.receiver.writeAheadLog.closeFileAfterWrite"
 
   val DRIVER_WAL_CLASS_CONF_KEY = "spark.streaming.driver.writeAheadLog.class"
   val DRIVER_WAL_ROLLING_INTERVAL_CONF_KEY =
     "spark.streaming.driver.writeAheadLog.rollingIntervalSecs"
   val DRIVER_WAL_MAX_FAILURES_CONF_KEY = "spark.streaming.driver.writeAheadLog.maxFailures"
+  val DRIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY =
+    "spark.streaming.driver.writeAheadLog.closeFileAfterWrite"
 
   val DEFAULT_ROLLING_INTERVAL_SECS = 60
   val DEFAULT_MAX_FAILURES = 3
@@ -60,6 +64,14 @@ private[streaming] object WriteAheadLogUtils extends Logging {
     }
   }
 
+  def shouldCloseFileAfterWrite(conf: SparkConf, isDriver: Boolean): Boolean = {
+    if (isDriver) {
+      conf.getBoolean(DRIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY, defaultValue = false)
+    } else {
+      conf.getBoolean(RECEIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY, defaultValue = false)
+    }
+  }
+
   /**
    * Create a WriteAheadLog for the driver. If configured with custom WAL class, it will try
    * to create instance of that class, otherwise it will create the default FileBasedWriteAheadLog.
@@ -113,7 +125,8 @@ private[streaming] object WriteAheadLogUtils extends Logging {
       }
     }.getOrElse {
       new FileBasedWriteAheadLog(sparkConf, fileWalLogDirectory, fileWalHadoopConf,
-        getRollingIntervalSecs(sparkConf, isDriver), getMaxFailures(sparkConf, isDriver))
+        getRollingIntervalSecs(sparkConf, isDriver), getMaxFailures(sparkConf, isDriver),
+        shouldCloseFileAfterWrite(sparkConf, isDriver))
     }
   }
 
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index 5e49fd00769a..93ae41a3d2ec 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -203,6 +203,21 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
     assert(writtenData === dataToWrite)
   }
 
+  test("FileBasedWriteAheadLog - close after write flag") {
+    // Write data with rotation using WriteAheadLog class
+    val numFiles = 3
+    val dataToWrite = Seq.tabulate(numFiles)(_.toString)
+    // total advance time is less than 1000, therefore log shouldn't be rolled, but manually closed
+    writeDataUsingWriteAheadLog(testDir, dataToWrite, closeLog = false, clockAdvanceTime = 100,
+      closeFileAfterWrite = true)
+
+    // Read data manually to verify the written data
+    val logFiles = getLogFilesInDirectory(testDir)
+    assert(logFiles.size === numFiles)
+    val writtenData = logFiles.flatMap { file => readDataManually(file)}
+    assert(writtenData === dataToWrite)
+  }
+
   test("FileBasedWriteAheadLog - read rotating logs") {
     // Write data manually for testing reading through WriteAheadLog
     val writtenData = (1 to 10).map { i =>
@@ -296,8 +311,8 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
     assert(!nonexistentTempPath.exists())
 
     val writtenSegment = writeDataManually(generateRandomData(), testFile)
-    val wal = new FileBasedWriteAheadLog(
-      new SparkConf(), tempDir.getAbsolutePath, new Configuration(), 1, 1)
+    val wal = new FileBasedWriteAheadLog(new SparkConf(), tempDir.getAbsolutePath,
+      new Configuration(), 1, 1, closeFileAfterWrite = false)
     assert(!nonexistentTempPath.exists(), "Directory created just by creating log object")
     wal.read(writtenSegment.head)
     assert(!nonexistentTempPath.exists(), "Directory created just by attempting to read segment")
@@ -356,14 +371,16 @@ object WriteAheadLogSuite {
       logDirectory: String,
       data: Seq[String],
       manualClock: ManualClock = new ManualClock,
-      closeLog: Boolean = true
-    ): FileBasedWriteAheadLog = {
+      closeLog: Boolean = true,
+      clockAdvanceTime: Int = 500,
+      closeFileAfterWrite: Boolean = false): FileBasedWriteAheadLog = {
     if (manualClock.getTimeMillis() < 100000) manualClock.setTime(10000)
-    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1)
+    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1,
+      closeFileAfterWrite)
 
     // Ensure that 500 does not get sorted after 2000, so put a high base value.
     data.foreach { item =>
-      manualClock.advance(500)
+      manualClock.advance(clockAdvanceTime)
       wal.write(item, manualClock.getTimeMillis())
     }
     if (closeLog) wal.close()
@@ -418,7 +435,8 @@ object WriteAheadLogSuite {
 
   /** Read all the data in the log file in a directory using the WriteAheadLog class. */
   def readDataUsingWriteAheadLog(logDirectory: String): Seq[String] = {
-    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1)
+    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1,
+      closeFileAfterWrite = false)
     val data = wal.readAll().asScala.map(byteBufferToString).toSeq
     wal.close()
     data

From 9fbd75ab5d46612e52116ec5b9ced70715cf26b5 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Tue, 27 Oct 2015 16:14:33 -0700
Subject: [PATCH 385/896] =?UTF-8?q?[SPARK-11212][CORE][STREAMING]=20Make?=
 =?UTF-8?q?=20preferred=20locations=20support=20ExecutorCacheTaskLocation?=
 =?UTF-8?q?=20and=20update=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

… ReceiverTracker and ReceiverSchedulingPolicy to use it

This PR includes the following changes:

1. Add a new preferred location format, `executor_<host>_<executorID>` (e.g., "executor_localhost_2"), to support specifying the executor locations for RDD.
2. Use the new preferred location format in `ReceiverTracker` to optimize the starting time of Receivers when there are multiple executors in a host.

The goal of this PR is to enable the streaming scheduler to place receivers (which run as tasks) in specific executors. Basically, I want to have more control on the placement of the receivers such that they are evenly distributed among the executors. We tried to do this without changing the core scheduling logic. But it does not allow specifying particular executor as preferred location, only at the host level. So if there are two executors in the same host, and I want two receivers to run on them (one on each executor), I cannot specify that. Current code only specifies the host as preference, which may end up launching both receivers on the same executor. We try to work around it but restarting a receiver when it does not launch in the desired executor and hope that next time it will be started in the right one. But that cause lots of restarts, and delays in correctly launching the receiver.

So this change, would allow the streaming scheduler to specify the exact executor as the preferred location. Also this is not exposed to the user, only the streaming scheduler uses this.

Author: zsxwing <zsxwing@gmail.com>

Closes #9181 from zsxwing/executor-location.
---
 .../apache/spark/scheduler/TaskLocation.scala |  17 ++-
 .../spark/scheduler/TaskSetManagerSuite.scala |   1 +
 .../receiver/ReceiverSupervisorImpl.scala     |   5 +-
 .../scheduler/ReceiverSchedulingPolicy.scala  | 110 +++++++++++-------
 .../streaming/scheduler/ReceiverTracker.scala |  93 ++++++++-------
 .../scheduler/ReceiverTrackingInfo.scala      |   9 +-
 .../ReceiverSchedulingPolicySuite.scala       | 110 +++++++++++-------
 .../scheduler/ReceiverTrackerSuite.scala      |   4 +-
 8 files changed, 217 insertions(+), 132 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
index 1b65926f5c74..1eb6c1614fc0 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskLocation.scala
@@ -31,7 +31,9 @@ private[spark] sealed trait TaskLocation {
  */
 private [spark]
 case class ExecutorCacheTaskLocation(override val host: String, executorId: String)
-  extends TaskLocation
+  extends TaskLocation {
+  override def toString: String = s"${TaskLocation.executorLocationTag}${host}_$executorId"
+}
 
 /**
  * A location on a host.
@@ -53,6 +55,9 @@ private[spark] object TaskLocation {
   // confusion.  See  RFC 952 and RFC 1123 for information about the format of hostnames.
   val inMemoryLocationTag = "hdfs_cache_"
 
+  // Identify locations of executors with this prefix.
+  val executorLocationTag = "executor_"
+
   def apply(host: String, executorId: String): TaskLocation = {
     new ExecutorCacheTaskLocation(host, executorId)
   }
@@ -65,7 +70,15 @@ private[spark] object TaskLocation {
   def apply(str: String): TaskLocation = {
     val hstr = str.stripPrefix(inMemoryLocationTag)
     if (hstr.equals(str)) {
-      new HostTaskLocation(str)
+      if (str.startsWith(executorLocationTag)) {
+        val splits = str.split("_")
+        if (splits.length != 3) {
+          throw new IllegalArgumentException("Illegal executor location format: " + str)
+        }
+        new ExecutorCacheTaskLocation(splits(1), splits(2))
+      } else {
+        new HostTaskLocation(str)
+      }
     } else {
       new HDFSCacheTaskLocation(hstr)
     }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
index 695523cc8aa3..cd6bf723e70c 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
@@ -779,6 +779,7 @@ class TaskSetManagerSuite extends SparkFunSuite with LocalSparkContext with Logg
   test("Test TaskLocation for different host type.") {
     assert(TaskLocation("host1") === HostTaskLocation("host1"))
     assert(TaskLocation("hdfs_cache_host1") === HDFSCacheTaskLocation("host1"))
+    assert(TaskLocation("executor_host1_3") === ExecutorCacheTaskLocation("host1", "3"))
   }
 
   def createTaskResult(id: Int): DirectTaskResult[Int] = {
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisorImpl.scala b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisorImpl.scala
index 59ef58d232ee..167f56aa4228 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisorImpl.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/receiver/ReceiverSupervisorImpl.scala
@@ -47,7 +47,8 @@ private[streaming] class ReceiverSupervisorImpl(
     checkpointDirOption: Option[String]
   ) extends ReceiverSupervisor(receiver, env.conf) with Logging {
 
-  private val hostPort = SparkEnv.get.blockManager.blockManagerId.hostPort
+  private val host = SparkEnv.get.blockManager.blockManagerId.host
+  private val executorId = SparkEnv.get.blockManager.blockManagerId.executorId
 
   private val receivedBlockHandler: ReceivedBlockHandler = {
     if (WriteAheadLogUtils.enableReceiverLog(env.conf)) {
@@ -179,7 +180,7 @@ private[streaming] class ReceiverSupervisorImpl(
 
   override protected def onReceiverStart(): Boolean = {
     val msg = RegisterReceiver(
-      streamId, receiver.getClass.getSimpleName, hostPort, endpoint)
+      streamId, receiver.getClass.getSimpleName, host, executorId, endpoint)
     trackerEndpoint.askWithRetry[Boolean](msg)
   }
 
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
index d2b0be7f4a9c..234bc8660da8 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicy.scala
@@ -20,8 +20,8 @@ package org.apache.spark.streaming.scheduler
 import scala.collection.Map
 import scala.collection.mutable
 
+import org.apache.spark.scheduler.{ExecutorCacheTaskLocation, TaskLocation}
 import org.apache.spark.streaming.receiver.Receiver
-import org.apache.spark.util.Utils
 
 /**
  * A class that tries to schedule receivers with evenly distributed. There are two phases for
@@ -29,23 +29,23 @@ import org.apache.spark.util.Utils
  *
  * - The first phase is global scheduling when ReceiverTracker is starting and we need to schedule
  *   all receivers at the same time. ReceiverTracker will call `scheduleReceivers` at this phase.
- *   It will try to schedule receivers with evenly distributed. ReceiverTracker should update its
- *   receiverTrackingInfoMap according to the results of `scheduleReceivers`.
- *   `ReceiverTrackingInfo.scheduledExecutors` for each receiver will set to an executor list that
- *   contains the scheduled locations. Then when a receiver is starting, it will send a register
- *   request and `ReceiverTracker.registerReceiver` will be called. In
- *   `ReceiverTracker.registerReceiver`, if a receiver's scheduled executors is set, it should check
- *   if the location of this receiver is one of the scheduled executors, if not, the register will
+ *   It will try to schedule receivers such that they are evenly distributed. ReceiverTracker should
+ *   update its `receiverTrackingInfoMap` according to the results of `scheduleReceivers`.
+ *   `ReceiverTrackingInfo.scheduledLocations` for each receiver should be set to an location list
+ *   that contains the scheduled locations. Then when a receiver is starting, it will send a
+ *   register request and `ReceiverTracker.registerReceiver` will be called. In
+ *   `ReceiverTracker.registerReceiver`, if a receiver's scheduled locations is set, it should check
+ *   if the location of this receiver is one of the scheduled locations, if not, the register will
  *   be rejected.
  * - The second phase is local scheduling when a receiver is restarting. There are two cases of
  *   receiver restarting:
  *   - If a receiver is restarting because it's rejected due to the real location and the scheduled
- *     executors mismatching, in other words, it fails to start in one of the locations that
+ *     locations mismatching, in other words, it fails to start in one of the locations that
  *     `scheduleReceivers` suggested, `ReceiverTracker` should firstly choose the executors that are
- *     still alive in the list of scheduled executors, then use them to launch the receiver job.
- *   - If a receiver is restarting without a scheduled executors list, or the executors in the list
+ *     still alive in the list of scheduled locations, then use them to launch the receiver job.
+ *   - If a receiver is restarting without a scheduled locations list, or the executors in the list
  *     are dead, `ReceiverTracker` should call `rescheduleReceiver`. If so, `ReceiverTracker` should
- *     not set `ReceiverTrackingInfo.scheduledExecutors` for this executor, instead, it should clear
+ *     not set `ReceiverTrackingInfo.scheduledLocations` for this receiver, instead, it should clear
  *     it. Then when this receiver is registering, we can know this is a local scheduling, and
  *     `ReceiverTrackingInfo` should call `rescheduleReceiver` again to check if the launching
  *     location is matching.
@@ -69,9 +69,12 @@ private[streaming] class ReceiverSchedulingPolicy {
    * </ol>
    *
    * This method is called when we start to launch receivers at the first time.
+   *
+   * @return a map for receivers and their scheduled locations
    */
   def scheduleReceivers(
-      receivers: Seq[Receiver[_]], executors: Seq[String]): Map[Int, Seq[String]] = {
+      receivers: Seq[Receiver[_]],
+      executors: Seq[ExecutorCacheTaskLocation]): Map[Int, Seq[TaskLocation]] = {
     if (receivers.isEmpty) {
       return Map.empty
     }
@@ -80,16 +83,16 @@ private[streaming] class ReceiverSchedulingPolicy {
       return receivers.map(_.streamId -> Seq.empty).toMap
     }
 
-    val hostToExecutors = executors.groupBy(executor => Utils.parseHostPort(executor)._1)
-    val scheduledExecutors = Array.fill(receivers.length)(new mutable.ArrayBuffer[String])
-    val numReceiversOnExecutor = mutable.HashMap[String, Int]()
+    val hostToExecutors = executors.groupBy(_.host)
+    val scheduledLocations = Array.fill(receivers.length)(new mutable.ArrayBuffer[TaskLocation])
+    val numReceiversOnExecutor = mutable.HashMap[ExecutorCacheTaskLocation, Int]()
     // Set the initial value to 0
     executors.foreach(e => numReceiversOnExecutor(e) = 0)
 
     // Firstly, we need to respect "preferredLocation". So if a receiver has "preferredLocation",
     // we need to make sure the "preferredLocation" is in the candidate scheduled executor list.
     for (i <- 0 until receivers.length) {
-      // Note: preferredLocation is host but executors are host:port
+      // Note: preferredLocation is host but executors are host_executorId
       receivers(i).preferredLocation.foreach { host =>
         hostToExecutors.get(host) match {
           case Some(executorsOnHost) =>
@@ -97,7 +100,7 @@ private[streaming] class ReceiverSchedulingPolicy {
             // this host
             val leastScheduledExecutor =
               executorsOnHost.minBy(executor => numReceiversOnExecutor(executor))
-            scheduledExecutors(i) += leastScheduledExecutor
+            scheduledLocations(i) += leastScheduledExecutor
             numReceiversOnExecutor(leastScheduledExecutor) =
               numReceiversOnExecutor(leastScheduledExecutor) + 1
           case None =>
@@ -106,17 +109,20 @@ private[streaming] class ReceiverSchedulingPolicy {
             // 1. This executor is not up. But it may be up later.
             // 2. This executor is dead, or it's not a host in the cluster.
             // Currently, simply add host to the scheduled executors.
-            scheduledExecutors(i) += host
+
+            // Note: host could be `HDFSCacheTaskLocation`, so use `TaskLocation.apply` to handle
+            // this case
+            scheduledLocations(i) += TaskLocation(host)
         }
       }
     }
 
     // For those receivers that don't have preferredLocation, make sure we assign at least one
     // executor to them.
-    for (scheduledExecutorsForOneReceiver <- scheduledExecutors.filter(_.isEmpty)) {
+    for (scheduledLocationsForOneReceiver <- scheduledLocations.filter(_.isEmpty)) {
       // Select the executor that has the least receivers
       val (leastScheduledExecutor, numReceivers) = numReceiversOnExecutor.minBy(_._2)
-      scheduledExecutorsForOneReceiver += leastScheduledExecutor
+      scheduledLocationsForOneReceiver += leastScheduledExecutor
       numReceiversOnExecutor(leastScheduledExecutor) = numReceivers + 1
     }
 
@@ -124,22 +130,22 @@ private[streaming] class ReceiverSchedulingPolicy {
     val idleExecutors = numReceiversOnExecutor.filter(_._2 == 0).map(_._1)
     for (executor <- idleExecutors) {
       // Assign an idle executor to the receiver that has least candidate executors.
-      val leastScheduledExecutors = scheduledExecutors.minBy(_.size)
+      val leastScheduledExecutors = scheduledLocations.minBy(_.size)
       leastScheduledExecutors += executor
     }
 
-    receivers.map(_.streamId).zip(scheduledExecutors).toMap
+    receivers.map(_.streamId).zip(scheduledLocations).toMap
   }
 
   /**
-   * Return a list of candidate executors to run the receiver. If the list is empty, the caller can
+   * Return a list of candidate locations to run the receiver. If the list is empty, the caller can
    * run this receiver in arbitrary executor.
    *
    * This method tries to balance executors' load. Here is the approach to schedule executors
    * for a receiver.
    * <ol>
    *   <li>
-   *     If preferredLocation is set, preferredLocation should be one of the candidate executors.
+   *     If preferredLocation is set, preferredLocation should be one of the candidate locations.
    *   </li>
    *   <li>
    *     Every executor will be assigned to a weight according to the receivers running or
@@ -163,40 +169,58 @@ private[streaming] class ReceiverSchedulingPolicy {
       receiverId: Int,
       preferredLocation: Option[String],
       receiverTrackingInfoMap: Map[Int, ReceiverTrackingInfo],
-      executors: Seq[String]): Seq[String] = {
+      executors: Seq[ExecutorCacheTaskLocation]): Seq[TaskLocation] = {
     if (executors.isEmpty) {
       return Seq.empty
     }
 
     // Always try to schedule to the preferred locations
-    val scheduledExecutors = mutable.Set[String]()
-    scheduledExecutors ++= preferredLocation
-
-    val executorWeights = receiverTrackingInfoMap.values.flatMap { receiverTrackingInfo =>
-      receiverTrackingInfo.state match {
-        case ReceiverState.INACTIVE => Nil
-        case ReceiverState.SCHEDULED =>
-          val scheduledExecutors = receiverTrackingInfo.scheduledExecutors.get
-          // The probability that a scheduled receiver will run in an executor is
-          // 1.0 / scheduledLocations.size
-          scheduledExecutors.map(location => location -> (1.0 / scheduledExecutors.size))
-        case ReceiverState.ACTIVE => Seq(receiverTrackingInfo.runningExecutor.get -> 1.0)
-      }
-    }.groupBy(_._1).mapValues(_.map(_._2).sum) // Sum weights for each executor
+    val scheduledLocations = mutable.Set[TaskLocation]()
+    // Note: preferredLocation could be `HDFSCacheTaskLocation`, so use `TaskLocation.apply` to
+    // handle this case
+    scheduledLocations ++= preferredLocation.map(TaskLocation(_))
+
+    val executorWeights: Map[ExecutorCacheTaskLocation, Double] = {
+      receiverTrackingInfoMap.values.flatMap(convertReceiverTrackingInfoToExecutorWeights)
+        .groupBy(_._1).mapValues(_.map(_._2).sum) // Sum weights for each executor
+    }
 
     val idleExecutors = executors.toSet -- executorWeights.keys
     if (idleExecutors.nonEmpty) {
-      scheduledExecutors ++= idleExecutors
+      scheduledLocations ++= idleExecutors
     } else {
       // There is no idle executor. So select all executors that have the minimum weight.
       val sortedExecutors = executorWeights.toSeq.sortBy(_._2)
       if (sortedExecutors.nonEmpty) {
         val minWeight = sortedExecutors(0)._2
-        scheduledExecutors ++= sortedExecutors.takeWhile(_._2 == minWeight).map(_._1)
+        scheduledLocations ++= sortedExecutors.takeWhile(_._2 == minWeight).map(_._1)
       } else {
         // This should not happen since "executors" is not empty
       }
     }
-    scheduledExecutors.toSeq
+    scheduledLocations.toSeq
+  }
+
+  /**
+   * This method tries to convert a receiver tracking info to executor weights. Every executor will
+   * be assigned to a weight according to the receivers running or scheduling on it:
+   *
+   * - If a receiver is running on an executor, it contributes 1.0 to the executor's weight.
+   * - If a receiver is scheduled to an executor but has not yet run, it contributes
+   * `1.0 / #candidate_executors_of_this_receiver` to the executor's weight.
+   */
+  private def convertReceiverTrackingInfoToExecutorWeights(
+      receiverTrackingInfo: ReceiverTrackingInfo): Seq[(ExecutorCacheTaskLocation, Double)] = {
+    receiverTrackingInfo.state match {
+      case ReceiverState.INACTIVE => Nil
+      case ReceiverState.SCHEDULED =>
+        val scheduledLocations = receiverTrackingInfo.scheduledLocations.get
+        // The probability that a scheduled receiver will run in an executor is
+        // 1.0 / scheduledLocations.size
+        scheduledLocations.filter(_.isInstanceOf[ExecutorCacheTaskLocation]).map { location =>
+          location.asInstanceOf[ExecutorCacheTaskLocation] -> (1.0 / scheduledLocations.size)
+        }
+      case ReceiverState.ACTIVE => Seq(receiverTrackingInfo.runningExecutor.get -> 1.0)
+    }
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index 2ce80d618b0a..b183d856f50c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -17,20 +17,21 @@
 
 package org.apache.spark.streaming.scheduler
 
-import java.util.concurrent.{TimeUnit, CountDownLatch}
+import java.util.concurrent.{CountDownLatch, TimeUnit}
 
 import scala.collection.mutable.HashMap
 import scala.concurrent.ExecutionContext
 import scala.language.existentials
 import scala.util.{Failure, Success}
 
-import org.apache.spark.streaming.util.WriteAheadLogUtils
 import org.apache.spark._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.rpc._
+import org.apache.spark.scheduler.{TaskLocation, ExecutorCacheTaskLocation}
 import org.apache.spark.streaming.{StreamingContext, Time}
 import org.apache.spark.streaming.receiver._
-import org.apache.spark.util.{Utils, ThreadUtils, SerializableConfiguration}
+import org.apache.spark.streaming.util.WriteAheadLogUtils
+import org.apache.spark.util.{SerializableConfiguration, ThreadUtils, Utils}
 
 
 /** Enumeration to identify current state of a Receiver */
@@ -47,7 +48,8 @@ private[streaming] sealed trait ReceiverTrackerMessage
 private[streaming] case class RegisterReceiver(
     streamId: Int,
     typ: String,
-    hostPort: String,
+    host: String,
+    executorId: String,
     receiverEndpoint: RpcEndpointRef
   ) extends ReceiverTrackerMessage
 private[streaming] case class AddBlock(receivedBlockInfo: ReceivedBlockInfo)
@@ -235,7 +237,8 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
   private def registerReceiver(
       streamId: Int,
       typ: String,
-      hostPort: String,
+      host: String,
+      executorId: String,
       receiverEndpoint: RpcEndpointRef,
       senderAddress: RpcAddress
     ): Boolean = {
@@ -247,18 +250,23 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       return false
     }
 
-    val scheduledExecutors = receiverTrackingInfos(streamId).scheduledExecutors
-    val accetableExecutors = if (scheduledExecutors.nonEmpty) {
+    val scheduledLocations = receiverTrackingInfos(streamId).scheduledLocations
+    val acceptableExecutors = if (scheduledLocations.nonEmpty) {
         // This receiver is registering and it's scheduled by
-        // ReceiverSchedulingPolicy.scheduleReceivers. So use "scheduledExecutors" to check it.
-        scheduledExecutors.get
+        // ReceiverSchedulingPolicy.scheduleReceivers. So use "scheduledLocations" to check it.
+        scheduledLocations.get
       } else {
         // This receiver is scheduled by "ReceiverSchedulingPolicy.rescheduleReceiver", so calling
         // "ReceiverSchedulingPolicy.rescheduleReceiver" again to check it.
         scheduleReceiver(streamId)
       }
 
-    if (!accetableExecutors.contains(hostPort)) {
+    def isAcceptable: Boolean = acceptableExecutors.exists {
+      case loc: ExecutorCacheTaskLocation => loc.executorId == executorId
+      case loc: TaskLocation => loc.host == host
+    }
+
+    if (!isAcceptable) {
       // Refuse it since it's scheduled to a wrong executor
       false
     } else {
@@ -266,8 +274,8 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       val receiverTrackingInfo = ReceiverTrackingInfo(
         streamId,
         ReceiverState.ACTIVE,
-        scheduledExecutors = None,
-        runningExecutor = Some(hostPort),
+        scheduledLocations = None,
+        runningExecutor = Some(ExecutorCacheTaskLocation(host, executorId)),
         name = Some(name),
         endpoint = Some(receiverEndpoint))
       receiverTrackingInfos.put(streamId, receiverTrackingInfo)
@@ -338,25 +346,25 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
     logWarning(s"Error reported by receiver for stream $streamId: $messageWithError")
   }
 
-  private def scheduleReceiver(receiverId: Int): Seq[String] = {
+  private def scheduleReceiver(receiverId: Int): Seq[TaskLocation] = {
     val preferredLocation = receiverPreferredLocations.getOrElse(receiverId, None)
-    val scheduledExecutors = schedulingPolicy.rescheduleReceiver(
+    val scheduledLocations = schedulingPolicy.rescheduleReceiver(
       receiverId, preferredLocation, receiverTrackingInfos, getExecutors)
-    updateReceiverScheduledExecutors(receiverId, scheduledExecutors)
-    scheduledExecutors
+    updateReceiverScheduledExecutors(receiverId, scheduledLocations)
+    scheduledLocations
   }
 
   private def updateReceiverScheduledExecutors(
-      receiverId: Int, scheduledExecutors: Seq[String]): Unit = {
+      receiverId: Int, scheduledLocations: Seq[TaskLocation]): Unit = {
     val newReceiverTrackingInfo = receiverTrackingInfos.get(receiverId) match {
       case Some(oldInfo) =>
         oldInfo.copy(state = ReceiverState.SCHEDULED,
-          scheduledExecutors = Some(scheduledExecutors))
+          scheduledLocations = Some(scheduledLocations))
       case None =>
         ReceiverTrackingInfo(
           receiverId,
           ReceiverState.SCHEDULED,
-          Some(scheduledExecutors),
+          Some(scheduledLocations),
           runningExecutor = None)
     }
     receiverTrackingInfos.put(receiverId, newReceiverTrackingInfo)
@@ -370,13 +378,16 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
   /**
    * Get the list of executors excluding driver
    */
-  private def getExecutors: Seq[String] = {
+  private def getExecutors: Seq[ExecutorCacheTaskLocation] = {
     if (ssc.sc.isLocal) {
-      Seq(ssc.sparkContext.env.blockManager.blockManagerId.hostPort)
+      val blockManagerId = ssc.sparkContext.env.blockManager.blockManagerId
+      Seq(ExecutorCacheTaskLocation(blockManagerId.host, blockManagerId.executorId))
     } else {
       ssc.sparkContext.env.blockManager.master.getMemoryStatus.filter { case (blockManagerId, _) =>
         blockManagerId.executorId != SparkContext.DRIVER_IDENTIFIER // Ignore the driver location
-      }.map { case (blockManagerId, _) => blockManagerId.hostPort }.toSeq
+      }.map { case (blockManagerId, _) =>
+        ExecutorCacheTaskLocation(blockManagerId.host, blockManagerId.executorId)
+      }.toSeq
     }
   }
 
@@ -431,9 +442,9 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
     override def receive: PartialFunction[Any, Unit] = {
       // Local messages
       case StartAllReceivers(receivers) =>
-        val scheduledExecutors = schedulingPolicy.scheduleReceivers(receivers, getExecutors)
+        val scheduledLocations = schedulingPolicy.scheduleReceivers(receivers, getExecutors)
         for (receiver <- receivers) {
-          val executors = scheduledExecutors(receiver.streamId)
+          val executors = scheduledLocations(receiver.streamId)
           updateReceiverScheduledExecutors(receiver.streamId, executors)
           receiverPreferredLocations(receiver.streamId) = receiver.preferredLocation
           startReceiver(receiver, executors)
@@ -441,14 +452,14 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
       case RestartReceiver(receiver) =>
         // Old scheduled executors minus the ones that are not active any more
         val oldScheduledExecutors = getStoredScheduledExecutors(receiver.streamId)
-        val scheduledExecutors = if (oldScheduledExecutors.nonEmpty) {
+        val scheduledLocations = if (oldScheduledExecutors.nonEmpty) {
             // Try global scheduling again
             oldScheduledExecutors
           } else {
             val oldReceiverInfo = receiverTrackingInfos(receiver.streamId)
-            // Clear "scheduledExecutors" to indicate we are going to do local scheduling
+            // Clear "scheduledLocations" to indicate we are going to do local scheduling
             val newReceiverInfo = oldReceiverInfo.copy(
-              state = ReceiverState.INACTIVE, scheduledExecutors = None)
+              state = ReceiverState.INACTIVE, scheduledLocations = None)
             receiverTrackingInfos(receiver.streamId) = newReceiverInfo
             schedulingPolicy.rescheduleReceiver(
               receiver.streamId,
@@ -458,7 +469,7 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
           }
         // Assume there is one receiver restarting at one time, so we don't need to update
         // receiverTrackingInfos
-        startReceiver(receiver, scheduledExecutors)
+        startReceiver(receiver, scheduledLocations)
       case c: CleanupOldBlocks =>
         receiverTrackingInfos.values.flatMap(_.endpoint).foreach(_.send(c))
       case UpdateReceiverRateLimit(streamUID, newRate) =>
@@ -472,9 +483,9 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
 
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
       // Remote messages
-      case RegisterReceiver(streamId, typ, hostPort, receiverEndpoint) =>
+      case RegisterReceiver(streamId, typ, host, executorId, receiverEndpoint) =>
         val successful =
-          registerReceiver(streamId, typ, hostPort, receiverEndpoint, context.senderAddress)
+          registerReceiver(streamId, typ, host, executorId, receiverEndpoint, context.senderAddress)
         context.reply(successful)
       case AddBlock(receivedBlockInfo) =>
         context.reply(addBlock(receivedBlockInfo))
@@ -493,13 +504,16 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
     /**
      * Return the stored scheduled executors that are still alive.
      */
-    private def getStoredScheduledExecutors(receiverId: Int): Seq[String] = {
+    private def getStoredScheduledExecutors(receiverId: Int): Seq[TaskLocation] = {
       if (receiverTrackingInfos.contains(receiverId)) {
-        val scheduledExecutors = receiverTrackingInfos(receiverId).scheduledExecutors
-        if (scheduledExecutors.nonEmpty) {
+        val scheduledLocations = receiverTrackingInfos(receiverId).scheduledLocations
+        if (scheduledLocations.nonEmpty) {
           val executors = getExecutors.toSet
           // Only return the alive executors
-          scheduledExecutors.get.filter(executors)
+          scheduledLocations.get.filter {
+            case loc: ExecutorCacheTaskLocation => executors(loc)
+            case loc: TaskLocation => true
+          }
         } else {
           Nil
         }
@@ -511,7 +525,9 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
     /**
      * Start a receiver along with its scheduled executors
      */
-    private def startReceiver(receiver: Receiver[_], scheduledExecutors: Seq[String]): Unit = {
+    private def startReceiver(
+        receiver: Receiver[_],
+        scheduledLocations: Seq[TaskLocation]): Unit = {
       def shouldStartReceiver: Boolean = {
         // It's okay to start when trackerState is Initialized or Started
         !(isTrackerStopping || isTrackerStopped)
@@ -546,13 +562,12 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
           }
         }
 
-      // Create the RDD using the scheduledExecutors to run the receiver in a Spark job
+      // Create the RDD using the scheduledLocations to run the receiver in a Spark job
       val receiverRDD: RDD[Receiver[_]] =
-        if (scheduledExecutors.isEmpty) {
+        if (scheduledLocations.isEmpty) {
           ssc.sc.makeRDD(Seq(receiver), 1)
         } else {
-          val preferredLocations =
-            scheduledExecutors.map(hostPort => Utils.parseHostPort(hostPort)._1).distinct
+          val preferredLocations = scheduledLocations.map(_.toString).distinct
           ssc.sc.makeRDD(Seq(receiver -> preferredLocations))
         }
       receiverRDD.setName(s"Receiver $receiverId")
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
index 043ff4d0ff05..ab0a84f05214 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.streaming.scheduler
 
 import org.apache.spark.rpc.RpcEndpointRef
+import org.apache.spark.scheduler.{ExecutorCacheTaskLocation, TaskLocation}
 import org.apache.spark.streaming.scheduler.ReceiverState._
 
 private[streaming] case class ReceiverErrorInfo(
@@ -28,7 +29,7 @@ private[streaming] case class ReceiverErrorInfo(
  *
  * @param receiverId the unique receiver id
  * @param state the current Receiver state
- * @param scheduledExecutors the scheduled executors provided by ReceiverSchedulingPolicy
+ * @param scheduledLocations the scheduled locations provided by ReceiverSchedulingPolicy
  * @param runningExecutor the running executor if the receiver is active
  * @param name the receiver name
  * @param endpoint the receiver endpoint. It can be used to send messages to the receiver
@@ -37,8 +38,8 @@ private[streaming] case class ReceiverErrorInfo(
 private[streaming] case class ReceiverTrackingInfo(
     receiverId: Int,
     state: ReceiverState,
-    scheduledExecutors: Option[Seq[String]],
-    runningExecutor: Option[String],
+    scheduledLocations: Option[Seq[TaskLocation]],
+    runningExecutor: Option[ExecutorCacheTaskLocation],
     name: Option[String] = None,
     endpoint: Option[RpcEndpointRef] = None,
     errorInfo: Option[ReceiverErrorInfo] = None) {
@@ -47,7 +48,7 @@ private[streaming] case class ReceiverTrackingInfo(
     receiverId,
     name.getOrElse(""),
     state == ReceiverState.ACTIVE,
-    location = runningExecutor.getOrElse(""),
+    location = runningExecutor.map(_.host).getOrElse(""),
     lastErrorMessage = errorInfo.map(_.lastErrorMessage).getOrElse(""),
     lastError = errorInfo.map(_.lastError).getOrElse(""),
     lastErrorTime = errorInfo.map(_.lastErrorTime).getOrElse(-1L)
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicySuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicySuite.scala
index b2a51d72bac2..05b4e66c63ac 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicySuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverSchedulingPolicySuite.scala
@@ -20,73 +20,96 @@ package org.apache.spark.streaming.scheduler
 import scala.collection.mutable
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.scheduler.{ExecutorCacheTaskLocation, HostTaskLocation, TaskLocation}
 
 class ReceiverSchedulingPolicySuite extends SparkFunSuite {
 
   val receiverSchedulingPolicy = new ReceiverSchedulingPolicy
 
   test("rescheduleReceiver: empty executors") {
-    val scheduledExecutors =
+    val scheduledLocations =
       receiverSchedulingPolicy.rescheduleReceiver(0, None, Map.empty, executors = Seq.empty)
-    assert(scheduledExecutors === Seq.empty)
+    assert(scheduledLocations === Seq.empty)
   }
 
   test("rescheduleReceiver: receiver preferredLocation") {
+    val executors = Seq(ExecutorCacheTaskLocation("host2", "2"))
     val receiverTrackingInfoMap = Map(
       0 -> ReceiverTrackingInfo(0, ReceiverState.INACTIVE, None, None))
-    val scheduledExecutors = receiverSchedulingPolicy.rescheduleReceiver(
-      0, Some("host1"), receiverTrackingInfoMap, executors = Seq("host2"))
-    assert(scheduledExecutors.toSet === Set("host1", "host2"))
+    val scheduledLocations = receiverSchedulingPolicy.rescheduleReceiver(
+      0, Some("host1"), receiverTrackingInfoMap, executors)
+    assert(scheduledLocations.toSet === Set(HostTaskLocation("host1"), executors(0)))
   }
 
   test("rescheduleReceiver: return all idle executors if there are any idle executors") {
-    val executors = Seq("host1", "host2", "host3", "host4", "host5")
-    // host3 is idle
+    val executors = (1 to 5).map(i => ExecutorCacheTaskLocation(s"host$i", s"$i"))
+    // executor 1 is busy, others are idle.
     val receiverTrackingInfoMap = Map(
-      0 -> ReceiverTrackingInfo(0, ReceiverState.ACTIVE, None, Some("host1")))
-    val scheduledExecutors = receiverSchedulingPolicy.rescheduleReceiver(
+      0 -> ReceiverTrackingInfo(0, ReceiverState.ACTIVE, None, Some(executors(0))))
+    val scheduledLocations = receiverSchedulingPolicy.rescheduleReceiver(
       1, None, receiverTrackingInfoMap, executors)
-    assert(scheduledExecutors.toSet === Set("host2", "host3", "host4", "host5"))
+    assert(scheduledLocations.toSet === executors.tail.toSet)
   }
 
   test("rescheduleReceiver: return all executors that have minimum weight if no idle executors") {
-    val executors = Seq("host1", "host2", "host3", "host4", "host5")
+    val executors = Seq(
+      ExecutorCacheTaskLocation("host1", "1"),
+      ExecutorCacheTaskLocation("host2", "2"),
+      ExecutorCacheTaskLocation("host3", "3"),
+      ExecutorCacheTaskLocation("host4", "4"),
+      ExecutorCacheTaskLocation("host5", "5")
+    )
     // Weights: host1 = 1.5, host2 = 0.5, host3 = 1.0, host4 = 0.5, host5 = 0.5
     val receiverTrackingInfoMap = Map(
-      0 -> ReceiverTrackingInfo(0, ReceiverState.ACTIVE, None, Some("host1")),
-      1 -> ReceiverTrackingInfo(1, ReceiverState.SCHEDULED, Some(Seq("host2", "host3")), None),
-      2 -> ReceiverTrackingInfo(2, ReceiverState.SCHEDULED, Some(Seq("host1", "host3")), None),
-      3 -> ReceiverTrackingInfo(4, ReceiverState.SCHEDULED, Some(Seq("host4", "host5")), None))
-    val scheduledExecutors = receiverSchedulingPolicy.rescheduleReceiver(
+      0 -> ReceiverTrackingInfo(0, ReceiverState.ACTIVE, None,
+        Some(ExecutorCacheTaskLocation("host1", "1"))),
+      1 -> ReceiverTrackingInfo(1, ReceiverState.SCHEDULED,
+        Some(Seq(ExecutorCacheTaskLocation("host2", "2"), ExecutorCacheTaskLocation("host3", "3"))),
+        None),
+      2 -> ReceiverTrackingInfo(2, ReceiverState.SCHEDULED,
+        Some(Seq(ExecutorCacheTaskLocation("host1", "1"), ExecutorCacheTaskLocation("host3", "3"))),
+        None),
+      3 -> ReceiverTrackingInfo(4, ReceiverState.SCHEDULED,
+        Some(Seq(ExecutorCacheTaskLocation("host4", "4"),
+          ExecutorCacheTaskLocation("host5", "5"))), None))
+    val scheduledLocations = receiverSchedulingPolicy.rescheduleReceiver(
       4, None, receiverTrackingInfoMap, executors)
-    assert(scheduledExecutors.toSet === Set("host2", "host4", "host5"))
+    val expectedScheduledLocations = Set(
+      ExecutorCacheTaskLocation("host2", "2"),
+      ExecutorCacheTaskLocation("host4", "4"),
+      ExecutorCacheTaskLocation("host5", "5")
+    )
+    assert(scheduledLocations.toSet === expectedScheduledLocations)
   }
 
   test("scheduleReceivers: " +
     "schedule receivers evenly when there are more receivers than executors") {
     val receivers = (0 until 6).map(new RateTestReceiver(_))
-    val executors = (10000 until 10003).map(port => s"localhost:${port}")
-    val scheduledExecutors = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
-    val numReceiversOnExecutor = mutable.HashMap[String, Int]()
+    val executors = (0 until 3).map(executorId =>
+      ExecutorCacheTaskLocation("localhost", executorId.toString))
+    val scheduledLocations = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
+    val numReceiversOnExecutor = mutable.HashMap[TaskLocation, Int]()
     // There should be 2 receivers running on each executor and each receiver has one executor
-    scheduledExecutors.foreach { case (receiverId, executors) =>
-      assert(executors.size == 1)
-      numReceiversOnExecutor(executors(0)) = numReceiversOnExecutor.getOrElse(executors(0), 0) + 1
+    scheduledLocations.foreach { case (receiverId, locations) =>
+      assert(locations.size == 1)
+      assert(locations(0).isInstanceOf[ExecutorCacheTaskLocation])
+      numReceiversOnExecutor(locations(0)) = numReceiversOnExecutor.getOrElse(locations(0), 0) + 1
     }
     assert(numReceiversOnExecutor === executors.map(_ -> 2).toMap)
   }
 
-
   test("scheduleReceivers: " +
     "schedule receivers evenly when there are more executors than receivers") {
     val receivers = (0 until 3).map(new RateTestReceiver(_))
-    val executors = (10000 until 10006).map(port => s"localhost:${port}")
-    val scheduledExecutors = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
-    val numReceiversOnExecutor = mutable.HashMap[String, Int]()
+    val executors = (0 until 6).map(executorId =>
+      ExecutorCacheTaskLocation("localhost", executorId.toString))
+    val scheduledLocations = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
+    val numReceiversOnExecutor = mutable.HashMap[TaskLocation, Int]()
     // There should be 1 receiver running on each executor and each receiver has two executors
-    scheduledExecutors.foreach { case (receiverId, executors) =>
-      assert(executors.size == 2)
-      executors.foreach { l =>
+    scheduledLocations.foreach { case (receiverId, locations) =>
+      assert(locations.size == 2)
+      locations.foreach { l =>
+        assert(l.isInstanceOf[ExecutorCacheTaskLocation])
         numReceiversOnExecutor(l) = numReceiversOnExecutor.getOrElse(l, 0) + 1
       }
     }
@@ -96,34 +119,41 @@ class ReceiverSchedulingPolicySuite extends SparkFunSuite {
   test("scheduleReceivers: schedule receivers evenly when the preferredLocations are even") {
     val receivers = (0 until 3).map(new RateTestReceiver(_)) ++
       (3 until 6).map(new RateTestReceiver(_, Some("localhost")))
-    val executors = (10000 until 10003).map(port => s"localhost:${port}") ++
-      (10003 until 10006).map(port => s"localhost2:${port}")
-    val scheduledExecutors = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
-    val numReceiversOnExecutor = mutable.HashMap[String, Int]()
+    val executors = (0 until 3).map(executorId =>
+      ExecutorCacheTaskLocation("localhost", executorId.toString)) ++
+      (3 until 6).map(executorId =>
+        ExecutorCacheTaskLocation("localhost2", executorId.toString))
+    val scheduledLocations = receiverSchedulingPolicy.scheduleReceivers(receivers, executors)
+    val numReceiversOnExecutor = mutable.HashMap[TaskLocation, Int]()
     // There should be 1 receiver running on each executor and each receiver has 1 executor
-    scheduledExecutors.foreach { case (receiverId, executors) =>
+    scheduledLocations.foreach { case (receiverId, executors) =>
       assert(executors.size == 1)
       executors.foreach { l =>
+        assert(l.isInstanceOf[ExecutorCacheTaskLocation])
         numReceiversOnExecutor(l) = numReceiversOnExecutor.getOrElse(l, 0) + 1
       }
     }
     assert(numReceiversOnExecutor === executors.map(_ -> 1).toMap)
     // Make sure we schedule the receivers to their preferredLocations
     val executorsForReceiversWithPreferredLocation =
-      scheduledExecutors.filter { case (receiverId, executors) => receiverId >= 3 }.flatMap(_._2)
+      scheduledLocations.filter { case (receiverId, executors) => receiverId >= 3 }.flatMap(_._2)
     // We can simply check the executor set because we only know each receiver only has 1 executor
     assert(executorsForReceiversWithPreferredLocation.toSet ===
-      (10000 until 10003).map(port => s"localhost:${port}").toSet)
+      (0 until 3).map(executorId =>
+        ExecutorCacheTaskLocation("localhost", executorId.toString)
+      ).toSet)
   }
 
   test("scheduleReceivers: return empty if no receiver") {
-    assert(receiverSchedulingPolicy.scheduleReceivers(Seq.empty, Seq("localhost:10000")).isEmpty)
+    val scheduledLocations = receiverSchedulingPolicy.
+      scheduleReceivers(Seq.empty, Seq(ExecutorCacheTaskLocation("localhost", "1")))
+    assert(scheduledLocations.isEmpty)
   }
 
   test("scheduleReceivers: return empty scheduled executors if no executors") {
     val receivers = (0 until 3).map(new RateTestReceiver(_))
-    val scheduledExecutors = receiverSchedulingPolicy.scheduleReceivers(receivers, Seq.empty)
-    scheduledExecutors.foreach { case (receiverId, executors) =>
+    val scheduledLocations = receiverSchedulingPolicy.scheduleReceivers(receivers, Seq.empty)
+    scheduledLocations.foreach { case (receiverId, executors) =>
       assert(executors.isEmpty)
     }
   }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
index fda86aef457d..3bd8d086abf7 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/scheduler/ReceiverTrackerSuite.scala
@@ -99,8 +99,8 @@ class ReceiverTrackerSuite extends TestSuiteBase {
       output.register()
       ssc.start()
       eventually(timeout(10 seconds), interval(10 millis)) {
-        // If preferredLocations is set correctly, receiverTaskLocality should be NODE_LOCAL
-        assert(receiverTaskLocality === TaskLocality.NODE_LOCAL)
+        // If preferredLocations is set correctly, receiverTaskLocality should be PROCESS_LOCAL
+        assert(receiverTaskLocality === TaskLocality.PROCESS_LOCAL)
       }
     }
   }

From b960a890561eaf3795b93c621bd95be81e56f5b7 Mon Sep 17 00:00:00 2001
From: Kay Ousterhout <kayousterhout@gmail.com>
Date: Tue, 27 Oct 2015 16:55:10 -0700
Subject: [PATCH 386/896] [SPARK-11178] Improving naming around task failures.

Commit af3bc59d1f5d9d952c2d7ad1af599c49f1dbdaf0 introduced new
functionality so that if an executor dies for a reason that's not
caused by one of the tasks running on the executor (e.g., due to
pre-emption), Spark doesn't count the failure towards the maximum
number of failures for the task.  That commit introduced some vague
naming that this commit attempts to fix; in particular:

(1) The variable "isNormalExit", which was used to refer to cases where
the executor died for a reason unrelated to the tasks running on the
machine, has been renamed (and reversed) to "exitCausedByApp". The problem
with the existing name is that it's not clear (at least to me!) what it
means for an exit to be "normal"; the new name is intended to make the
purpose of this variable more clear.

(2) The variable "shouldEventuallyFailJob" has been renamed to
"countTowardsTaskFailures". This variable is used to determine whether
a task's failure should be counted towards the maximum number of failures
allowed for a task before the associated Stage is aborted. The problem
with the existing name is that it can be confused with implying that
the task's failure should immediately cause the stage to fail because it
is somehow fatal (this is the case for a fetch failure, for example: if
a task fails because of a fetch failure, there's no point in retrying,
and the whole stage should be failed).

Author: Kay Ousterhout <kayousterhout@gmail.com>

Closes #9164 from kayousterhout/SPARK-11178.
---
 .../org/apache/spark/TaskEndReason.scala      | 22 ++++++++++-----
 .../spark/scheduler/ExecutorLossReason.scala  |  9 ++++---
 .../spark/scheduler/TaskSetManager.scala      | 16 ++++++-----
 .../cluster/CoarseGrainedClusterMessage.scala |  2 +-
 .../cluster/SparkDeploySchedulerBackend.scala |  2 +-
 .../cluster/YarnSchedulerBackend.scala        |  8 +++---
 .../cluster/mesos/MesosSchedulerBackend.scala |  2 +-
 .../org/apache/spark/util/JsonProtocol.scala  |  9 +++----
 .../spark/scheduler/TaskSetManagerSuite.scala | 10 ++++---
 .../apache/spark/util/JsonProtocolSuite.scala |  6 ++---
 .../spark/deploy/yarn/YarnAllocator.scala     | 27 ++++++++++---------
 11 files changed, 66 insertions(+), 47 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/TaskEndReason.scala b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
index 9335c5f4160b..18278b292ff5 100644
--- a/core/src/main/scala/org/apache/spark/TaskEndReason.scala
+++ b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
@@ -53,7 +53,13 @@ sealed trait TaskFailedReason extends TaskEndReason {
   /** Error message displayed in the web UI. */
   def toErrorString: String
 
-  def shouldEventuallyFailJob: Boolean = true
+  /**
+   * Whether this task failure should be counted towards the maximum number of times the task is
+   * allowed to fail before the stage is aborted.  Set to false in cases where the task's failure
+   * was unrelated to the task; for example, if the task failed because the executor it was running
+   * on was killed.
+   */
+  def countTowardsTaskFailures: Boolean = true
 }
 
 /**
@@ -208,7 +214,7 @@ case class TaskCommitDenied(
    * towards failing the stage. This is intended to prevent spurious stage failures in cases
    * where many speculative tasks are launched and denied to commit.
    */
-  override def shouldEventuallyFailJob: Boolean = false
+  override def countTowardsTaskFailures: Boolean = false
 }
 
 /**
@@ -217,14 +223,18 @@ case class TaskCommitDenied(
  * the task crashed the JVM.
  */
 @DeveloperApi
-case class ExecutorLostFailure(execId: String, isNormalExit: Boolean = false)
+case class ExecutorLostFailure(execId: String, exitCausedByApp: Boolean = true)
   extends TaskFailedReason {
   override def toErrorString: String = {
-    val exitBehavior = if (isNormalExit) "normally" else "abnormally"
-    s"ExecutorLostFailure (executor ${execId} exited ${exitBehavior})"
+    val exitBehavior = if (exitCausedByApp) {
+      "caused by one of the running tasks"
+    } else {
+      "unrelated to the running tasks"
+    }
+    s"ExecutorLostFailure (executor ${execId} exited due to an issue ${exitBehavior})"
   }
 
-  override def shouldEventuallyFailJob: Boolean = !isNormalExit
+  override def countTowardsTaskFailures: Boolean = exitCausedByApp
 }
 
 /**
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
index 0a98c69b89ea..33edf2504385 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
@@ -28,12 +28,15 @@ class ExecutorLossReason(val message: String) extends Serializable {
 }
 
 private[spark]
-case class ExecutorExited(exitCode: Int, isNormalExit: Boolean, reason: String)
+case class ExecutorExited(exitCode: Int, exitCausedByApp: Boolean, reason: String)
   extends ExecutorLossReason(reason)
 
 private[spark] object ExecutorExited {
-  def apply(exitCode: Int, isNormalExit: Boolean): ExecutorExited = {
-    ExecutorExited(exitCode, isNormalExit, ExecutorExitCode.explainExitCode(exitCode))
+  def apply(exitCode: Int, exitCausedByApp: Boolean): ExecutorExited = {
+    ExecutorExited(
+      exitCode,
+      exitCausedByApp,
+      ExecutorExitCode.explainExitCode(exitCode))
   }
 }
 
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
index 987800d3d1f1..9b3fad9012ab 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
@@ -704,9 +704,10 @@ private[spark] class TaskSetManager(
         }
         ef.exception
 
-      case e: ExecutorLostFailure if e.isNormalExit =>
+      case e: ExecutorLostFailure if !e.exitCausedByApp =>
         logInfo(s"Task $tid failed because while it was being computed, its executor" +
-          s" exited normally. Not marking the task as failed.")
+          "exited for a reason unrelated to the task. Not counting this failure towards the " +
+          "maximum number of failures for the task.")
         None
 
       case e: TaskFailedReason =>  // TaskResultLost, TaskKilled, and others
@@ -724,7 +725,7 @@ private[spark] class TaskSetManager(
     addPendingTask(index)
     if (!isZombie && state != TaskState.KILLED
         && reason.isInstanceOf[TaskFailedReason]
-        && reason.asInstanceOf[TaskFailedReason].shouldEventuallyFailJob) {
+        && reason.asInstanceOf[TaskFailedReason].countTowardsTaskFailures) {
       assert (null != failureReason)
       numFailures(index) += 1
       if (numFailures(index) >= maxTaskFailures) {
@@ -797,11 +798,12 @@ private[spark] class TaskSetManager(
       }
     }
     for ((tid, info) <- taskInfos if info.running && info.executorId == execId) {
-      val isNormalExit: Boolean = reason match {
-        case exited: ExecutorExited => exited.isNormalExit
-        case _ => false
+      val exitCausedByApp: Boolean = reason match {
+        case exited: ExecutorExited => exited.exitCausedByApp
+        case _ => true
       }
-      handleFailedTask(tid, TaskState.FAILED, ExecutorLostFailure(info.executorId, isNormalExit))
+      handleFailedTask(
+        tid, TaskState.FAILED, ExecutorLostFailure(info.executorId, exitCausedByApp))
     }
     // recalculate valid locality levels and waits when executor is lost
     recomputeLocality()
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
index 4652df32efa7..8103efa7302e 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
@@ -98,7 +98,7 @@ private[spark] object CoarseGrainedClusterMessages {
       hostToLocalTaskCount: Map[String, Int])
     extends CoarseGrainedClusterMessage
 
-  // Check if an executor was force-killed but for a normal reason.
+  // Check if an executor was force-killed but for a reason unrelated to the running tasks.
   // This could be the case if the executor is preempted, for instance.
   case class GetExecutorLossReason(executorId: String) extends CoarseGrainedClusterMessage
 
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
index a4214c496166..05d9bc92f228 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
@@ -137,7 +137,7 @@ private[spark] class SparkDeploySchedulerBackend(
 
   override def executorRemoved(fullId: String, message: String, exitStatus: Option[Int]) {
     val reason: ExecutorLossReason = exitStatus match {
-      case Some(code) => ExecutorExited(code, isNormalExit = false, message)
+      case Some(code) => ExecutorExited(code, exitCausedByApp = true, message)
       case None => SlaveLost(message)
     }
     logInfo("Executor %s removed: %s".format(fullId, message))
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index 38218b9c08fd..e483688edef5 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -111,10 +111,10 @@ private[spark] abstract class YarnSchedulerBackend(
      * immediately.
      *
      * In YARN's case however it is crucial to talk to the application master and ask why the
-     * executor had exited. In particular, the executor may have exited due to the executor
-     * having been preempted. If the executor "exited normally" according to the application
-     * master then we pass that information down to the TaskSetManager to inform the
-     * TaskSetManager that tasks on that lost executor should not count towards a job failure.
+     * executor had exited. If the executor exited for some reason unrelated to the running tasks
+     * (e.g., preemption), according to the application master, then we pass that information down
+     * to the TaskSetManager to inform the TaskSetManager that tasks on that lost executor should
+     * not count towards a job failure.
      *
      * TODO there's a race condition where while we are querying the ApplicationMaster for
      * the executor loss reason, there is the potential that tasks will be scheduled on
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
index 6196176c7cc3..aaffac604a88 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
@@ -394,7 +394,7 @@ private[spark] class MesosSchedulerBackend(
                             slaveId: SlaveID, status: Int) {
     logInfo("Executor lost: %s, marking slave %s as lost".format(executorId.getValue,
                                                                  slaveId.getValue))
-    recordSlaveLost(d, slaveId, ExecutorExited(status, isNormalExit = false))
+    recordSlaveLost(d, slaveId, ExecutorExited(status, exitCausedByApp = true))
   }
 
   override def killTask(taskId: Long, executorId: String, interruptThread: Boolean): Unit = {
diff --git a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
index a06dc6f709d3..ad6615c1124d 100644
--- a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
@@ -367,9 +367,9 @@ private[spark] object JsonProtocol {
         ("Job ID" -> taskCommitDenied.jobID) ~
         ("Partition ID" -> taskCommitDenied.partitionID) ~
         ("Attempt Number" -> taskCommitDenied.attemptNumber)
-      case ExecutorLostFailure(executorId, isNormalExit) =>
+      case ExecutorLostFailure(executorId, exitCausedByApp) =>
         ("Executor ID" -> executorId) ~
-        ("Normal Exit" -> isNormalExit)
+        ("Exit Caused By App" -> exitCausedByApp)
       case _ => Utils.emptyJson
     }
     ("Reason" -> reason) ~ json
@@ -810,10 +810,9 @@ private[spark] object JsonProtocol {
         val attemptNo = Utils.jsonOption(json \ "Attempt Number").map(_.extract[Int]).getOrElse(-1)
         TaskCommitDenied(jobId, partitionId, attemptNo)
       case `executorLostFailure` =>
-        val isNormalExit = Utils.jsonOption(json \ "Normal Exit").
-          map(_.extract[Boolean])
+        val exitCausedByApp = Utils.jsonOption(json \ "Exit Caused By App").map(_.extract[Boolean])
         val executorId = Utils.jsonOption(json \ "Executor ID").map(_.extract[String])
-        ExecutorLostFailure(executorId.getOrElse("Unknown"), isNormalExit.getOrElse(false))
+        ExecutorLostFailure(executorId.getOrElse("Unknown"), exitCausedByApp.getOrElse(true))
       case `unknownReason` => UnknownReason
     }
   }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
index cd6bf723e70c..ecc18fc6e15b 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/TaskSetManagerSuite.scala
@@ -511,7 +511,7 @@ class TaskSetManagerSuite extends SparkFunSuite with LocalSparkContext with Logg
     assert(manager.myLocalityLevels.sameElements(Array(NO_PREF, ANY)))
   }
 
-  test("Executors are added but exit normally while running tasks") {
+  test("Executors exit for reason unrelated to currently running tasks") {
     sc = new SparkContext("local", "test")
     val sched = new FakeTaskScheduler(sc)
     val taskSet = FakeTask.createTaskSet(4,
@@ -526,11 +526,15 @@ class TaskSetManagerSuite extends SparkFunSuite with LocalSparkContext with Logg
     manager.executorAdded()
     assert(manager.resourceOffer("exec1", "host1", ANY).isDefined)
     sched.removeExecutor("execA")
-    manager.executorLost("execA", "host1", ExecutorExited(143, true, "Normal termination"))
+    manager.executorLost(
+      "execA",
+      "host1",
+      ExecutorExited(143, false, "Terminated for reason unrelated to running tasks"))
     assert(!sched.taskSetsFailed.contains(taskSet.id))
     assert(manager.resourceOffer("execC", "host2", ANY).isDefined)
     sched.removeExecutor("execC")
-    manager.executorLost("execC", "host2", ExecutorExited(1, false, "Abnormal termination"))
+    manager.executorLost(
+      "execC", "host2", ExecutorExited(1, true, "Terminated due to issue with running tasks"))
     assert(sched.taskSetsFailed.contains(taskSet.id))
   }
 
diff --git a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
index f9572921f43c..86137f259c13 100644
--- a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
@@ -603,10 +603,10 @@ class JsonProtocolSuite extends SparkFunSuite {
         assert(jobId1 === jobId2)
         assert(partitionId1 === partitionId2)
         assert(attemptNumber1 === attemptNumber2)
-      case (ExecutorLostFailure(execId1, isNormalExit1),
-          ExecutorLostFailure(execId2, isNormalExit2)) =>
+      case (ExecutorLostFailure(execId1, exit1CausedByApp),
+          ExecutorLostFailure(execId2, exit2CausedByApp)) =>
         assert(execId1 === execId2)
-        assert(isNormalExit1 === isNormalExit2)
+        assert(exit1CausedByApp === exit2CausedByApp)
       case (UnknownReason, UnknownReason) =>
       case _ => fail("Task end reasons don't match in types!")
     }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index 1deaa3743ddf..875bbd4e4e3d 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -445,40 +445,41 @@ private[yarn] class YarnAllocator(
         // there are some exit status' we shouldn't necessarily count against us, but for
         // now I think its ok as none of the containers are expected to exit.
         val exitStatus = completedContainer.getExitStatus
-        val (isNormalExit, containerExitReason) = exitStatus match {
+        val (exitCausedByApp, containerExitReason) = exitStatus match {
           case ContainerExitStatus.SUCCESS =>
-            (true, s"Executor for container $containerId exited normally.")
+            (false, s"Executor for container $containerId exited because of a YARN event (e.g., " +
+              "pre-emption) and not because of an error in the running job.")
           case ContainerExitStatus.PREEMPTED =>
-            // Preemption should count as a normal exit, since YARN preempts containers merely
-            // to do resource sharing, and tasks that fail due to preempted executors could
+            // Preemption is not the fault of the running tasks, since YARN preempts containers
+            // merely to do resource sharing, and tasks that fail due to preempted executors could
             // just as easily finish on any other executor. See SPARK-8167.
-            (true, s"Container ${containerId}${onHostStr} was preempted.")
+            (false, s"Container ${containerId}${onHostStr} was preempted.")
           // Should probably still count memory exceeded exit codes towards task failures
           case VMEM_EXCEEDED_EXIT_CODE =>
-            (false, memLimitExceededLogMessage(
+            (true, memLimitExceededLogMessage(
               completedContainer.getDiagnostics,
               VMEM_EXCEEDED_PATTERN))
           case PMEM_EXCEEDED_EXIT_CODE =>
-            (false, memLimitExceededLogMessage(
+            (true, memLimitExceededLogMessage(
               completedContainer.getDiagnostics,
               PMEM_EXCEEDED_PATTERN))
           case unknown =>
             numExecutorsFailed += 1
-            (false, "Container marked as failed: " + containerId + onHostStr +
+            (true, "Container marked as failed: " + containerId + onHostStr +
               ". Exit status: " + completedContainer.getExitStatus +
               ". Diagnostics: " + completedContainer.getDiagnostics)
 
         }
-        if (isNormalExit) {
-          logInfo(containerExitReason)
-        } else {
+        if (exitCausedByApp) {
           logWarning(containerExitReason)
+        } else {
+          logInfo(containerExitReason)
         }
-        ExecutorExited(0, isNormalExit, containerExitReason)
+        ExecutorExited(0, exitCausedByApp, containerExitReason)
       } else {
         // If we have already released this container, then it must mean
         // that the driver has explicitly requested it to be killed
-        ExecutorExited(completedContainer.getExitStatus, isNormalExit = true,
+        ExecutorExited(completedContainer.getExitStatus, exitCausedByApp = false,
           s"Container $containerId exited from explicit termination request.")
       }
 

From d9c6039897236c3f1e4503aa95c5c9b07b32eadd Mon Sep 17 00:00:00 2001
From: Cheng Hao <hao.cheng@intel.com>
Date: Tue, 27 Oct 2015 20:26:38 -0700
Subject: [PATCH 387/896] [SPARK-10484] [SQL] Optimize the cartesian join with
 broadcast join for some cases

In some cases, we can broadcast the smaller relation in cartesian join, which improve the performance significantly.

Author: Cheng Hao <hao.cheng@intel.com>

Closes #8652 from chenghao-intel/cartesian.
---
 .../spark/sql/execution/SparkPlanner.scala    |  3 +-
 .../spark/sql/execution/SparkStrategies.scala | 38 +++++---
 .../joins/BroadcastNestedLoopJoin.scala       |  7 +-
 .../org/apache/spark/sql/JoinSuite.scala      | 92 +++++++++++++++++++
 .../apache/spark/sql/hive/HiveContext.scala   |  3 +-
 ... JOIN #1-0-abfc0b99ee357f71639f6162345fe8e | 20 ++++
 ...JOIN #2-0-8412a39ee57885ccb0aaf848db8ef1dd | 20 ++++
 ...JOIN #3-0-e8a0427dbde35eea6011144443e5ffb4 | 20 ++++
 ...JOIN #4-0-45f8602d257655322b7d18cad09f6a0f | 20 ++++
 .../sql/hive/execution/HiveQuerySuite.scala   | 54 +++++++++++
 10 files changed, 261 insertions(+), 16 deletions(-)
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #1-0-abfc0b99ee357f71639f6162345fe8e
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #2-0-8412a39ee57885ccb0aaf848db8ef1dd
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #3-0-e8a0427dbde35eea6011144443e5ffb4
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #4-0-45f8602d257655322b7d18cad09f6a0f

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
index b346f43faebe..0f98fe88b210 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
@@ -44,8 +44,9 @@ class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
       EquiJoinSelection ::
       InMemoryScans ::
       BasicOperators ::
+      BroadcastNestedLoop ::
       CartesianProduct ::
-      BroadcastNestedLoopJoin :: Nil)
+      DefaultJoin :: Nil)
 
   /**
    * Used to build table scan operators where complex projection and filtering are done using
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 637deff4e220..ee9716285316 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -294,25 +294,24 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
     }
   }
 
-
-  object BroadcastNestedLoopJoin extends Strategy {
+  object BroadcastNestedLoop extends Strategy {
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
-      case logical.Join(left, right, joinType, condition) =>
-        val buildSide =
-          if (right.statistics.sizeInBytes <= left.statistics.sizeInBytes) {
-            joins.BuildRight
-          } else {
-            joins.BuildLeft
-          }
-        joins.BroadcastNestedLoopJoin(
-          planLater(left), planLater(right), buildSide, joinType, condition) :: Nil
+      case logical.Join(
+             CanBroadcast(left), right, joinType, condition) if joinType != LeftSemiJoin =>
+        execution.joins.BroadcastNestedLoopJoin(
+          planLater(left), planLater(right), joins.BuildLeft, joinType, condition) :: Nil
+      case logical.Join(
+             left, CanBroadcast(right), joinType, condition) if joinType != LeftSemiJoin =>
+        execution.joins.BroadcastNestedLoopJoin(
+          planLater(left), planLater(right), joins.BuildRight, joinType, condition) :: Nil
       case _ => Nil
     }
   }
 
   object CartesianProduct extends Strategy {
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
-      case logical.Join(left, right, _, None) =>
+      // TODO CartesianProduct doesn't support the Left Semi Join
+      case logical.Join(left, right, joinType, None) if joinType != LeftSemiJoin =>
         execution.joins.CartesianProduct(planLater(left), planLater(right)) :: Nil
       case logical.Join(left, right, Inner, Some(condition)) =>
         execution.Filter(condition,
@@ -321,6 +320,21 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
     }
   }
 
+  object DefaultJoin extends Strategy {
+    def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
+      case logical.Join(left, right, joinType, condition) =>
+        val buildSide =
+          if (right.statistics.sizeInBytes <= left.statistics.sizeInBytes) {
+            joins.BuildRight
+          } else {
+            joins.BuildLeft
+          }
+        joins.BroadcastNestedLoopJoin(
+          planLater(left), planLater(right), buildSide, joinType, condition) :: Nil
+      case _ => Nil
+    }
+  }
+
   protected lazy val singleRowRdd = sparkContext.parallelize(Seq(InternalRow()), 1)
 
   object TakeOrderedAndProject extends Strategy {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
index efef8c8a8b96..05d20f511aef 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
@@ -21,7 +21,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical.Partitioning
-import org.apache.spark.sql.catalyst.plans.{FullOuter, JoinType, LeftOuter, RightOuter}
+import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.util.collection.CompactBuffer
@@ -67,7 +67,10 @@ case class BroadcastNestedLoopJoin(
         left.output.map(_.withNullability(true)) ++ right.output
       case FullOuter =>
         left.output.map(_.withNullability(true)) ++ right.output.map(_.withNullability(true))
-      case x =>
+      case Inner =>
+        // TODO we can avoid breaking the lineage, since we union an empty RDD for Inner Join case
+        left.output ++ right.output
+      case x => // TODO support the Left Semi Join
         throw new IllegalArgumentException(
           s"BroadcastNestedLoopJoin should not take $x as the JoinType")
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
index b1fb06815868..a9ca46cab067 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
@@ -28,6 +28,10 @@ class JoinSuite extends QueryTest with SharedSQLContext {
 
   setupTestData()
 
+  def statisticSizeInByte(df: DataFrame): BigInt = {
+    df.queryExecution.optimizedPlan.statistics.sizeInBytes
+  }
+
   test("equi-join is hash-join") {
     val x = testData2.as("x")
     val y = testData2.as("y")
@@ -466,6 +470,94 @@ class JoinSuite extends QueryTest with SharedSQLContext {
     sql("UNCACHE TABLE testData")
   }
 
+  test("cross join with broadcast") {
+    sql("CACHE TABLE testData")
+
+    val sizeInByteOfTestData = statisticSizeInByte(sqlContext.table("testData"))
+
+    // we set the threshold is greater than statistic of the cached table testData
+    withSQLConf(
+      SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> (sizeInByteOfTestData + 1).toString()) {
+
+      assert(statisticSizeInByte(sqlContext.table("testData2")) >
+        sqlContext.conf.autoBroadcastJoinThreshold)
+
+      assert(statisticSizeInByte(sqlContext.table("testData")) <
+        sqlContext.conf.autoBroadcastJoinThreshold)
+
+      Seq(
+        ("SELECT * FROM testData LEFT SEMI JOIN testData2 ON key = a",
+          classOf[LeftSemiJoinHash]),
+        ("SELECT * FROM testData LEFT SEMI JOIN testData2",
+          classOf[LeftSemiJoinBNL]),
+        ("SELECT * FROM testData JOIN testData2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData JOIN testData2 WHERE key = 2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData LEFT JOIN testData2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData RIGHT JOIN testData2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData FULL OUTER JOIN testData2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData LEFT JOIN testData2 WHERE key = 2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData RIGHT JOIN testData2 WHERE key = 2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData FULL OUTER JOIN testData2 WHERE key = 2",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData JOIN testData2 WHERE key > a",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData FULL OUTER JOIN testData2 WHERE key > a",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData left JOIN testData2 WHERE (key * a != key + a)",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData right JOIN testData2 WHERE (key * a != key + a)",
+          classOf[BroadcastNestedLoopJoin]),
+        ("SELECT * FROM testData full JOIN testData2 WHERE (key * a != key + a)",
+          classOf[BroadcastNestedLoopJoin])
+      ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
+
+      checkAnswer(
+        sql(
+          """
+            SELECT x.value, y.a, y.b FROM testData x JOIN testData2 y WHERE x.key = 2
+          """.stripMargin),
+        Row("2", 1, 1) ::
+        Row("2", 1, 2) ::
+        Row("2", 2, 1) ::
+        Row("2", 2, 2) ::
+        Row("2", 3, 1) ::
+        Row("2", 3, 2) :: Nil)
+
+      checkAnswer(
+        sql(
+          """
+            SELECT x.value, y.a, y.b FROM testData x JOIN testData2 y WHERE x.key < y.a
+          """.stripMargin),
+        Row("1", 2, 1) ::
+        Row("1", 2, 2) ::
+        Row("1", 3, 1) ::
+        Row("1", 3, 2) ::
+        Row("2", 3, 1) ::
+        Row("2", 3, 2) :: Nil)
+
+      checkAnswer(
+        sql(
+          """
+            SELECT x.value, y.a, y.b FROM testData x JOIN testData2 y ON x.key < y.a
+          """.stripMargin),
+        Row("1", 2, 1) ::
+          Row("1", 2, 2) ::
+          Row("1", 3, 1) ::
+          Row("1", 3, 2) ::
+          Row("2", 3, 1) ::
+          Row("2", 3, 2) :: Nil)
+    }
+
+    sql("UNCACHE TABLE testData")
+  }
+
   test("left semi join") {
     val df = sql("SELECT * FROM testData2 LEFT SEMI JOIN testData ON key = a")
     checkAnswer(df,
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c328734df316..83a81cf5d1fc 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -588,8 +588,9 @@ class HiveContext private[hive](
       LeftSemiJoin,
       EquiJoinSelection,
       BasicOperators,
+      BroadcastNestedLoop,
       CartesianProduct,
-      BroadcastNestedLoopJoin
+      DefaultJoin
     )
   }
 
diff --git a/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #1-0-abfc0b99ee357f71639f6162345fe8e b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #1-0-abfc0b99ee357f71639f6162345fe8e
new file mode 100644
index 000000000000..0bb9399af0c4
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #1-0-abfc0b99ee357f71639f6162345fe8e	
@@ -0,0 +1,20 @@
+302	0
+302	0
+302	0
+305	0
+305	0
+305	0
+306	0
+306	0
+306	0
+307	0
+307	0
+307	0
+307	0
+307	0
+307	0
+308	0
+308	0
+308	0
+309	0
+309	0
diff --git a/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #2-0-8412a39ee57885ccb0aaf848db8ef1dd b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #2-0-8412a39ee57885ccb0aaf848db8ef1dd
new file mode 100644
index 000000000000..4e455ed25511
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #2-0-8412a39ee57885ccb0aaf848db8ef1dd	
@@ -0,0 +1,20 @@
+302	0
+302	0
+302	0
+305	0
+305	0
+305	0
+305	2
+305	4
+306	0
+306	0
+306	0
+306	2
+306	4
+306	5
+306	5
+306	5
+307	0
+307	0
+307	0
+307	0
diff --git a/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #3-0-e8a0427dbde35eea6011144443e5ffb4 b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #3-0-e8a0427dbde35eea6011144443e5ffb4
new file mode 100644
index 000000000000..4e455ed25511
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #3-0-e8a0427dbde35eea6011144443e5ffb4	
@@ -0,0 +1,20 @@
+302	0
+302	0
+302	0
+305	0
+305	0
+305	0
+305	2
+305	4
+306	0
+306	0
+306	0
+306	2
+306	4
+306	5
+306	5
+306	5
+307	0
+307	0
+307	0
+307	0
diff --git a/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #4-0-45f8602d257655322b7d18cad09f6a0f b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #4-0-45f8602d257655322b7d18cad09f6a0f
new file mode 100644
index 000000000000..4e455ed25511
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #4-0-45f8602d257655322b7d18cad09f6a0f	
@@ -0,0 +1,20 @@
+302	0
+302	0
+302	0
+305	0
+305	0
+305	0
+305	2
+305	4
+306	0
+306	0
+306	0
+306	2
+306	4
+306	5
+306	5
+306	5
+307	0
+307	0
+307	0
+307	0
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index 287850045314..b52f7d4b5789 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -20,6 +20,8 @@ package org.apache.spark.sql.hive.execution
 import java.io.File
 import java.util.{Locale, TimeZone}
 
+import org.apache.spark.sql.execution.joins.BroadcastNestedLoopJoin
+
 import scala.util.Try
 
 import org.scalatest.BeforeAndAfter
@@ -69,6 +71,58 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
     }
   }
 
+  // Testing the Broadcast based join for cartesian join (cross join)
+  // We assume that the Broadcast Join Threshold will works since the src is a small table
+  private val spark_10484_1 = """
+                                | SELECT a.key, b.key
+                                | FROM src a LEFT JOIN src b WHERE a.key > b.key + 300
+                                | ORDER BY b.key, a.key
+                                | LIMIT 20
+                              """.stripMargin
+  private val spark_10484_2 = """
+                                | SELECT a.key, b.key
+                                | FROM src a RIGHT JOIN src b WHERE a.key > b.key + 300
+                                | ORDER BY a.key, b.key
+                                | LIMIT 20
+                              """.stripMargin
+  private val spark_10484_3 = """
+                                | SELECT a.key, b.key
+                                | FROM src a FULL OUTER JOIN src b WHERE a.key > b.key + 300
+                                | ORDER BY a.key, b.key
+                                | LIMIT 20
+                              """.stripMargin
+  private val spark_10484_4 = """
+                                | SELECT a.key, b.key
+                                | FROM src a JOIN src b WHERE a.key > b.key + 300
+                                | ORDER BY a.key, b.key
+                                | LIMIT 20
+                              """.stripMargin
+
+  createQueryTest("SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #1",
+    spark_10484_1)
+
+  createQueryTest("SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #2",
+    spark_10484_2)
+
+  createQueryTest("SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #3",
+    spark_10484_3)
+
+  createQueryTest("SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN #4",
+    spark_10484_4)
+
+  test("SPARK-10484 Optimize the Cartesian (Cross) Join with broadcast based JOIN") {
+    def assertBroadcastNestedLoopJoin(sqlText: String): Unit = {
+      assert(sql(sqlText).queryExecution.sparkPlan.collect {
+        case _: BroadcastNestedLoopJoin => 1
+      }.nonEmpty)
+    }
+
+    assertBroadcastNestedLoopJoin(spark_10484_1)
+    assertBroadcastNestedLoopJoin(spark_10484_2)
+    assertBroadcastNestedLoopJoin(spark_10484_3)
+    assertBroadcastNestedLoopJoin(spark_10484_4)
+  }
+
   createQueryTest("SPARK-8976 Wrong Result for Rollup #1",
     """
       SELECT count(*) AS cnt, key % 5,GROUPING__ID FROM src group by key%5 WITH ROLLUP

From 826e1e304b57abbc56b8b7ffd663d53942ab3c7c Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Tue, 27 Oct 2015 23:07:37 -0700
Subject: [PATCH 388/896] [SPARK-11302][MLLIB] 2) Multivariate Gaussian Model
 with Covariance matrix returns incorrect answer in some cases

Fix computation of root-sigma-inverse in multivariate Gaussian; add a test and fix related Python mixture model test.

Supersedes https://github.com/apache/spark/pull/9293

Author: Sean Owen <sowen@cloudera.com>

Closes #9309 from srowen/SPARK-11302.2.
---
 .../stat/distribution/MultivariateGaussian.scala  |  8 ++++----
 .../distribution/MultivariateGaussianSuite.scala  | 15 +++++++++++++++
 python/pyspark/mllib/clustering.py                |  4 ++--
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala b/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
index 92a5af708d04..0724af93088c 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussian.scala
@@ -56,7 +56,7 @@ class MultivariateGaussian @Since("1.3.0") (
 
   /**
    * Compute distribution dependent constants:
-   *    rootSigmaInv = D^(-1/2)^ * U, where sigma = U * D * U.t
+   *    rootSigmaInv = D^(-1/2)^ * U.t, where sigma = U * D * U.t
    *    u = log((2*pi)^(-k/2)^ * det(sigma)^(-1/2)^)
    */
   private val (rootSigmaInv: DBM[Double], u: Double) = calculateCovarianceConstants
@@ -104,11 +104,11 @@ class MultivariateGaussian @Since("1.3.0") (
    *
    *    sigma = U * D * U.t
    *    inv(Sigma) = U * inv(D) * U.t
-   *               = (D^{-1/2}^ * U).t * (D^{-1/2}^ * U)
+   *               = (D^{-1/2}^ * U.t).t * (D^{-1/2}^ * U.t)
    *
    * and thus
    *
-   *    -0.5 * (x-mu).t * inv(Sigma) * (x-mu) = -0.5 * norm(D^{-1/2}^ * U  * (x-mu))^2^
+   *    -0.5 * (x-mu).t * inv(Sigma) * (x-mu) = -0.5 * norm(D^{-1/2}^ * U.t  * (x-mu))^2^
    *
    * To guard against singular covariance matrices, this method computes both the
    * pseudo-determinant and the pseudo-inverse (Moore-Penrose).  Singular values are considered
@@ -130,7 +130,7 @@ class MultivariateGaussian @Since("1.3.0") (
       // by inverting the square root of all non-zero values
       val pinvS = diag(new DBV(d.map(v => if (v > tol) math.sqrt(1.0 / v) else 0.0).toArray))
 
-      (pinvS * u, -0.5 * (mu.size * math.log(2.0 * math.Pi) + logPseudoDetSigma))
+      (pinvS * u.t, -0.5 * (mu.size * math.log(2.0 * math.Pi) + logPseudoDetSigma))
     } catch {
       case uex: UnsupportedOperationException =>
         throw new IllegalArgumentException("Covariance matrix has no non-zero singular values")
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussianSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussianSuite.scala
index aa60deb665ae..6e7a00347545 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussianSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/stat/distribution/MultivariateGaussianSuite.scala
@@ -65,4 +65,19 @@ class MultivariateGaussianSuite extends SparkFunSuite with MLlibTestSparkContext
     assert(dist.pdf(x1) ~== 0.11254 absTol 1E-5)
     assert(dist.pdf(x2) ~== 0.068259 absTol 1E-5)
   }
+
+  test("SPARK-11302") {
+    val x = Vectors.dense(629, 640, 1.7188, 618.19)
+    val mu = Vectors.dense(
+      1055.3910505836575, 1070.489299610895, 1.39020554474708, 1040.5907503867697)
+    val sigma = Matrices.dense(4, 4, Array(
+      166769.00466698944, 169336.6705268059, 12.820670788921873, 164243.93314092053,
+      169336.6705268059, 172041.5670061245, 21.62590020524533, 166678.01075856484,
+      12.820670788921873, 21.62590020524533, 0.872524191943962, 4.283255814732373,
+      164243.93314092053, 166678.01075856484, 4.283255814732373, 161848.9196719207))
+    val dist = new MultivariateGaussian(mu, sigma)
+    // Agrees with R's dmvnorm: 7.154782e-05
+    assert(dist.pdf(x) ~== 7.154782224045512E-5 absTol 1E-9)
+  }
+
 }
diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index c451df17cf26..d1c3755a785f 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -236,9 +236,9 @@ class GaussianMixtureModel(JavaModelWrapper, JavaSaveable, JavaLoader):
     >>> model = GaussianMixture.train(clusterdata_2, 2, convergenceTol=0.0001,
     ...                               maxIterations=150, seed=10)
     >>> labels = model.predict(clusterdata_2).collect()
-    >>> labels[0]==labels[1]==labels[2]
+    >>> labels[0]==labels[1]
     True
-    >>> labels[3]==labels[4]
+    >>> labels[2]==labels[3]==labels[4]
     True
 
     .. versionadded:: 1.3.0

From 82c1c5772817785709b0289f7d836beba812c791 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 27 Oct 2015 23:41:42 -0700
Subject: [PATCH 389/896] [MINOR][ML] fix compile warns

This fixes some compile time warnings.

Author: Xiangrui Meng <meng@databricks.com>

Closes #9319 from mengxr/mllib-compile-warn-20151027.
---
 .../org/apache/spark/ml/regression/LinearRegression.scala      | 2 +-
 .../spark/ml/classification/LogisticRegressionSuite.scala      | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 573a61a6eabd..c3ee8b3bc1ba 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -145,7 +145,7 @@ class LinearRegression(override val uid: String)
     // Extract the number of features before deciding optimization solver.
     val numFeatures = dataset.select(col($(featuresCol))).limit(1).map {
       case Row(features: Vector) => features.size
-    }.toArray()(0)
+    }.first()
     val w = if ($(weightCol).isEmpty) lit(1.0) else col($(weightCol))
 
     if (($(solver) == "auto" && $(elasticNetParam) == 0.0 && numFeatures <= 4096) ||
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index 5186c4e2be64..e0a795e5e0b0 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.ml.classification
 
+import scala.language.existentials
 import scala.util.Random
 
 import org.apache.spark.SparkFunSuite
@@ -24,7 +25,7 @@ import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.util.MLTestingUtils
 import org.apache.spark.mllib.classification.LogisticRegressionSuite._
-import org.apache.spark.mllib.linalg.{Vectors, Vector}
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._

From 5f1cee6f158adb1f9f485ed1d529c56bace68adc Mon Sep 17 00:00:00 2001
From: Nakul Jindal <njindal@us.ibm.com>
Date: Wed, 28 Oct 2015 01:02:03 -0700
Subject: [PATCH 390/896] [SPARK-11332] [ML] Refactored to use
 ml.feature.Instance instead of WeightedLeastSquare.Instance

WeightedLeastSquares now uses the common Instance class in ml.feature instead of a private one.

Author: Nakul Jindal <njindal@us.ibm.com>

Closes #9325 from nakul02/SPARK-11332_refactor_WeightedLeastSquares_dot_Instance.
---
 .../spark/ml/optim/WeightedLeastSquares.scala | 25 ++++++-------------
 .../ml/regression/LinearRegression.scala      |  4 +--
 .../ml/optim/WeightedLeastSquaresSuite.scala  | 10 ++++----
 3 files changed, 15 insertions(+), 24 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
index d7eaa5a9268f..3d64f7f29613 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.optim
 
 import org.apache.spark.Logging
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.rdd.RDD
 
@@ -121,16 +122,6 @@ private[ml] class WeightedLeastSquares(
 
 private[ml] object WeightedLeastSquares {
 
-  /**
-   * Case class for weighted observations.
-   * @param w weight, must be positive
-   * @param a features
-   * @param b label
-   */
-  case class Instance(w: Double, a: Vector, b: Double) {
-    require(w >= 0.0, s"Weight cannot be negative: $w.")
-  }
-
   /**
    * Aggregator to provide necessary summary statistics for solving [[WeightedLeastSquares]].
    */
@@ -168,8 +159,8 @@ private[ml] object WeightedLeastSquares {
      * Adds an instance.
      */
     def add(instance: Instance): this.type = {
-      val Instance(w, a, b) = instance
-      val ak = a.size
+      val Instance(l, w, f) = instance
+      val ak = f.size
       if (!initialized) {
         init(ak)
       }
@@ -177,11 +168,11 @@ private[ml] object WeightedLeastSquares {
       count += 1L
       wSum += w
       wwSum += w * w
-      bSum += w * b
-      bbSum += w * b * b
-      BLAS.axpy(w, a, aSum)
-      BLAS.axpy(w * b, a, abSum)
-      BLAS.spr(w, a, aaSum)
+      bSum += w * l
+      bbSum += w * l * l
+      BLAS.axpy(w, f, aSum)
+      BLAS.axpy(w * l, f, abSum)
+      BLAS.spr(w, f, aaSum)
       this
     }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index c3ee8b3bc1ba..f663b9bd9ac7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -154,10 +154,10 @@ class LinearRegression(override val uid: String)
         "solver is used.'")
       // For low dimensional data, WeightedLeastSquares is more efficiently since the
       // training algorithm only requires one pass through the data. (SPARK-10668)
-      val instances: RDD[WeightedLeastSquares.Instance] = dataset.select(
+      val instances: RDD[Instance] = dataset.select(
         col($(labelCol)), w, col($(featuresCol))).map {
           case Row(label: Double, weight: Double, features: Vector) =>
-            WeightedLeastSquares.Instance(weight, features, label)
+            Instance(label, weight, features)
       }
 
       val optimizer = new WeightedLeastSquares($(fitIntercept), $(regParam),
diff --git a/mllib/src/test/scala/org/apache/spark/ml/optim/WeightedLeastSquaresSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/optim/WeightedLeastSquaresSuite.scala
index 652f3adb984d..b542ba3dc54d 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/optim/WeightedLeastSquaresSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/optim/WeightedLeastSquaresSuite.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.ml.optim
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.ml.optim.WeightedLeastSquares.Instance
+import org.apache.spark.ml.feature.Instance
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
@@ -38,10 +38,10 @@ class WeightedLeastSquaresSuite extends SparkFunSuite with MLlibTestSparkContext
        w <- c(1, 2, 3, 4)
      */
     instances = sc.parallelize(Seq(
-      Instance(1.0, Vectors.dense(0.0, 5.0).toSparse, 17.0),
-      Instance(2.0, Vectors.dense(1.0, 7.0), 19.0),
-      Instance(3.0, Vectors.dense(2.0, 11.0), 23.0),
-      Instance(4.0, Vectors.dense(3.0, 13.0), 29.0)
+      Instance(17.0, 1.0, Vectors.dense(0.0, 5.0).toSparse),
+      Instance(19.0, 2.0, Vectors.dense(1.0, 7.0)),
+      Instance(23.0, 3.0, Vectors.dense(2.0, 11.0)),
+      Instance(29.0, 4.0, Vectors.dense(3.0, 13.0))
     ), 2)
   }
 

From 075ce4914fdcbbcc7286c3c30cb940ed28d474d2 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 28 Oct 2015 13:58:52 +0100
Subject: [PATCH 391/896] [SPARK-11313][SQL] implement cogroup on DataSets
 (support 2 datasets)

A simpler version of https://github.com/apache/spark/pull/9279, only support 2 datasets.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9324 from cloud-fan/cogroup2.
---
 .../sql/catalyst/expressions/UnsafeRow.java   |  1 +
 .../plans/logical/basicOperators.scala        | 39 ++++++++
 .../org/apache/spark/sql/GroupedDataset.scala | 20 +++++
 .../sql/execution/CoGroupedIterator.scala     | 89 +++++++++++++++++++
 .../spark/sql/execution/SparkStrategies.scala |  4 +
 .../spark/sql/execution/basicOperators.scala  | 41 +++++++++
 .../org/apache/spark/sql/DatasetSuite.scala   | 12 +++
 .../execution/CoGroupedIteratorSuite.scala    | 51 +++++++++++
 8 files changed, 257 insertions(+)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 850838af9be3..5ba14ebdb62a 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -591,6 +591,7 @@ public String toString() {
       build.append(java.lang.Long.toHexString(Platform.getLong(baseObject, baseOffset + i)));
       build.append(',');
     }
+    build.deleteCharAt(build.length() - 1);
     build.append(']');
     return build.toString();
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index d2d3db0a4448..4cb67aacf33e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -513,3 +513,42 @@ case class MapGroups[K, T, U](
   override def missingInput: AttributeSet = AttributeSet.empty
 }
 
+/** Factory for constructing new `CoGroup` nodes. */
+object CoGroup {
+  def apply[K : Encoder, Left : Encoder, Right : Encoder, R : Encoder](
+      func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+      leftGroup: Seq[Attribute],
+      rightGroup: Seq[Attribute],
+      left: LogicalPlan,
+      right: LogicalPlan): CoGroup[K, Left, Right, R] = {
+    CoGroup(
+      func,
+      encoderFor[K],
+      encoderFor[Left],
+      encoderFor[Right],
+      encoderFor[R],
+      encoderFor[R].schema.toAttributes,
+      leftGroup,
+      rightGroup,
+      left,
+      right)
+  }
+}
+
+/**
+ * A relation produced by applying `func` to each grouping key and associated values from left and
+ * right children.
+ */
+case class CoGroup[K, Left, Right, R](
+    func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+    kEncoder: ExpressionEncoder[K],
+    leftEnc: ExpressionEncoder[Left],
+    rightEnc: ExpressionEncoder[Right],
+    rEncoder: ExpressionEncoder[R],
+    output: Seq[Attribute],
+    leftGroup: Seq[Attribute],
+    rightGroup: Seq[Attribute],
+    left: LogicalPlan,
+    right: LogicalPlan) extends BinaryNode {
+  override def missingInput: AttributeSet = AttributeSet.empty
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 89a16dd8b0ac..612f2b60cd40 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -65,4 +65,24 @@ class GroupedDataset[K, T] private[sql](
       sqlContext,
       MapGroups(f, groupingAttributes, logicalPlan))
   }
+
+  /**
+   * Applies the given function to each cogrouped data.  For each unique group, the function will
+   * be passed the grouping key and 2 iterators containing all elements in the group from
+   * [[Dataset]] `this` and `other`.  The function can return an iterator containing elements of an
+   * arbitrary type which will be returned as a new [[Dataset]].
+   */
+  def cogroup[U, R : Encoder](
+      other: GroupedDataset[K, U])(
+      f: (K, Iterator[T], Iterator[U]) => Iterator[R]): Dataset[R] = {
+    implicit def uEnc: Encoder[U] = other.tEncoder
+    new Dataset[R](
+      sqlContext,
+      CoGroup(
+        f,
+        this.groupingAttributes,
+        other.groupingAttributes,
+        this.logicalPlan,
+        other.logicalPlan))
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
new file mode 100644
index 000000000000..ce5827855e4a
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.{Ascending, SortOrder, Attribute}
+import org.apache.spark.sql.catalyst.expressions.codegen.GenerateOrdering
+
+/**
+ * Iterates over [[GroupedIterator]]s and returns the cogrouped data, i.e. each record is a
+ * grouping key with its associated values from all [[GroupedIterator]]s.
+ * Note: we assume the output of each [[GroupedIterator]] is ordered by the grouping key.
+ */
+class CoGroupedIterator(
+    left: Iterator[(InternalRow, Iterator[InternalRow])],
+    right: Iterator[(InternalRow, Iterator[InternalRow])],
+    groupingSchema: Seq[Attribute])
+  extends Iterator[(InternalRow, Iterator[InternalRow], Iterator[InternalRow])] {
+
+  private val keyOrdering =
+    GenerateOrdering.generate(groupingSchema.map(SortOrder(_, Ascending)), groupingSchema)
+
+  private var currentLeftData: (InternalRow, Iterator[InternalRow]) = _
+  private var currentRightData: (InternalRow, Iterator[InternalRow]) = _
+
+  override def hasNext: Boolean = left.hasNext || right.hasNext
+
+  override def next(): (InternalRow, Iterator[InternalRow], Iterator[InternalRow]) = {
+    if (currentLeftData.eq(null) && left.hasNext) {
+      currentLeftData = left.next()
+    }
+    if (currentRightData.eq(null) && right.hasNext) {
+      currentRightData = right.next()
+    }
+
+    assert(currentLeftData.ne(null) || currentRightData.ne(null))
+
+    if (currentLeftData.eq(null)) {
+      // left is null, right is not null, consume the right data.
+      rightOnly()
+    } else if (currentRightData.eq(null)) {
+      // left is not null, right is null, consume the left data.
+      leftOnly()
+    } else if (currentLeftData._1 == currentRightData._1) {
+      // left and right have the same grouping key, consume both of them.
+      val result = (currentLeftData._1, currentLeftData._2, currentRightData._2)
+      currentLeftData = null
+      currentRightData = null
+      result
+    } else {
+      val compare = keyOrdering.compare(currentLeftData._1, currentRightData._1)
+      assert(compare != 0)
+      if (compare < 0) {
+        // the grouping key of left is smaller, consume the left data.
+        leftOnly()
+      } else {
+        // the grouping key of right is smaller, consume the right data.
+        rightOnly()
+      }
+    }
+  }
+
+  private def leftOnly(): (InternalRow, Iterator[InternalRow], Iterator[InternalRow]) = {
+    val result = (currentLeftData._1, currentLeftData._2, Iterator.empty)
+    currentLeftData = null
+    result
+  }
+
+  private def rightOnly(): (InternalRow, Iterator[InternalRow], Iterator[InternalRow]) = {
+    val result = (currentRightData._1, Iterator.empty, currentRightData._2)
+    currentRightData = null
+    result
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index ee9716285316..32067266b516 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -393,6 +393,10 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         execution.AppendColumns(f, tEnc, uEnc, newCol, planLater(child)) :: Nil
       case logical.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, child) =>
         execution.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, planLater(child)) :: Nil
+      case logical.CoGroup(f, kEnc, leftEnc, rightEnc, rEnc, output,
+        leftGroup, rightGroup, left, right) =>
+        execution.CoGroup(f, kEnc, leftEnc, rightEnc, rEnc, output, leftGroup, rightGroup,
+          planLater(left), planLater(right)) :: Nil
 
       case logical.Repartition(numPartitions, shuffle, child) =>
         if (shuffle) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 89938471ee38..d5a803f8c4b2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -390,3 +390,44 @@ case class MapGroups[K, T, U](
     }
   }
 }
+
+/**
+ * Co-groups the data from left and right children, and calls the function with each group and 2
+ * iterators containing all elements in the group from left and right side.
+ * The result of this function is encoded and flattened before being output.
+ */
+case class CoGroup[K, Left, Right, R](
+    func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+    kEncoder: ExpressionEncoder[K],
+    leftEnc: ExpressionEncoder[Left],
+    rightEnc: ExpressionEncoder[Right],
+    rEncoder: ExpressionEncoder[R],
+    output: Seq[Attribute],
+    leftGroup: Seq[Attribute],
+    rightGroup: Seq[Attribute],
+    left: SparkPlan,
+    right: SparkPlan) extends BinaryNode {
+
+  override def requiredChildDistribution: Seq[Distribution] =
+    ClusteredDistribution(leftGroup) :: ClusteredDistribution(rightGroup) :: Nil
+
+  override def requiredChildOrdering: Seq[Seq[SortOrder]] =
+    leftGroup.map(SortOrder(_, Ascending)) :: rightGroup.map(SortOrder(_, Ascending)) :: Nil
+
+  override protected def doExecute(): RDD[InternalRow] = {
+    left.execute().zipPartitions(right.execute()) { (leftData, rightData) =>
+      val leftGrouped = GroupedIterator(leftData, leftGroup, left.output)
+      val rightGrouped = GroupedIterator(rightData, rightGroup, right.output)
+      val groupKeyEncoder = kEncoder.bind(leftGroup)
+
+      new CoGroupedIterator(leftGrouped, rightGrouped, leftGroup).flatMap {
+        case (key, leftResult, rightResult) =>
+          val result = func(
+            groupKeyEncoder.fromRow(key),
+            leftResult.map(leftEnc.fromRow),
+            rightResult.map(rightEnc.fromRow))
+          result.map(rEncoder.toRow)
+      }
+    }
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index aebb390a1d15..993e6d269ee0 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -202,4 +202,16 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       agged,
       ("a", 30), ("b", 3), ("c", 1))
   }
+
+  test("cogroup") {
+    val ds1 = Seq(1 -> "a", 3 -> "abc", 5 -> "hello", 3 -> "foo").toDS()
+    val ds2 = Seq(2 -> "q", 3 -> "w", 5 -> "e", 5 -> "r").toDS()
+    val cogrouped = ds1.groupBy(_._1).cogroup(ds2.groupBy(_._1)) { case (key, data1, data2) =>
+      Iterator(key -> (data1.map(_._2).mkString + "#" + data2.map(_._2).mkString))
+    }
+
+    checkAnswer(
+      cogrouped,
+      1 -> "a#", 2 -> "#q", 3 -> "abcfoo#w", 5 -> "hello#er")
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
new file mode 100644
index 000000000000..d1fe81947e9e
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.expressions.ExpressionEvalHelper
+
+class CoGroupedIteratorSuite extends SparkFunSuite with ExpressionEvalHelper {
+
+  test("basic") {
+    val leftInput = Seq(create_row(1, "a"), create_row(1, "b"), create_row(2, "c")).iterator
+    val rightInput = Seq(create_row(1, 2L), create_row(2, 3L), create_row(3, 4L)).iterator
+    val leftGrouped = GroupedIterator(leftInput, Seq('i.int.at(0)), Seq('i.int, 's.string))
+    val rightGrouped = GroupedIterator(rightInput, Seq('i.int.at(0)), Seq('i.int, 'l.long))
+    val cogrouped = new CoGroupedIterator(leftGrouped, rightGrouped, Seq('i.int))
+
+    val result = cogrouped.map {
+      case (key, leftData, rightData) =>
+        assert(key.numFields == 1)
+        (key.getInt(0), leftData.toSeq, rightData.toSeq)
+    }.toSeq
+    assert(result ==
+      (1,
+        Seq(create_row(1, "a"), create_row(1, "b")),
+        Seq(create_row(1, 2L))) ::
+      (2,
+        Seq(create_row(2, "c")),
+        Seq(create_row(2, 3L))) ::
+      (3,
+        Seq.empty,
+        Seq(create_row(3, 4L))) ::
+      Nil
+    )
+  }
+}

From fd9e345ceeff385ba614a16d478097650caa98d0 Mon Sep 17 00:00:00 2001
From: "Mageswaran.D" <mageswaran1989@gmail.com>
Date: Wed, 28 Oct 2015 08:46:30 -0700
Subject: [PATCH 392/896] Typo in mllib-evaluation-metrics.md

Recall by threshold snippet was using "precisionByThreshold"

Author: Mageswaran.D <mageswaran1989@gmail.com>

Closes #9333 from Mageswaran1989/Typo_in_mllib-evaluation-metrics.md.
---
 docs/mllib-evaluation-metrics.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/mllib-evaluation-metrics.md b/docs/mllib-evaluation-metrics.md
index 2270f7a34b06..f73eff637dc3 100644
--- a/docs/mllib-evaluation-metrics.md
+++ b/docs/mllib-evaluation-metrics.md
@@ -141,7 +141,7 @@ precision.foreach { case (t, p) =>
 }
 
 // Recall by threshold
-val recall = metrics.precisionByThreshold
+val recall = metrics.recallByThreshold
 recall.foreach { case (t, r) =>
     println(s"Threshold: $t, Recall: $r")
 }
@@ -1509,4 +1509,4 @@ print("Explained variance = %s" % metrics.explainedVariance)
 {% endhighlight %}
 
 </div>
-</div>
\ No newline at end of file
+</div>

From fba9e95452ca0a9b589bc14b27c750c69f482b8d Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 28 Oct 2015 08:50:21 -0700
Subject: [PATCH 393/896] [SPARK-11369][ML][R] SparkR glm should support
 setting standardize
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

SparkR glm currently support :
```formula, family = c(“gaussian”, “binomial”), data, lambda = 0, alpha = 0```
We should also support setting standardize which has been defined at [design documentation](https://docs.google.com/document/d/10NZNSEurN2EdWM31uFYsgayIPfCFHiuIu3pCWrUmP_c/edit)

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9331 from yanboliang/spark-11369.
---
 R/pkg/R/mllib.R                                               | 4 ++--
 .../src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index 25615e805e03..aadd5b8da5e3 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -46,11 +46,11 @@ setClass("PipelineModel", representation(model = "jobj"))
 #'}
 setMethod("glm", signature(formula = "formula", family = "ANY", data = "DataFrame"),
           function(formula, family = c("gaussian", "binomial"), data, lambda = 0, alpha = 0,
-            solver = "auto") {
+            standardize = TRUE, solver = "auto") {
             family <- match.arg(family)
             model <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
                                  "fitRModelFormula", deparse(formula), data@sdf, family, lambda,
-                                 alpha, solver)
+                                 alpha, standardize, solver)
             return(new("PipelineModel", model = model))
           })
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index fec61fed3cb9..21ebf6d916db 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -31,6 +31,7 @@ private[r] object SparkRWrappers {
       family: String,
       lambda: Double,
       alpha: Double,
+      standardize: Boolean,
       solver: String): PipelineModel = {
     val formula = new RFormula().setFormula(value)
     val estimator = family match {
@@ -38,11 +39,13 @@ private[r] object SparkRWrappers {
         .setRegParam(lambda)
         .setElasticNetParam(alpha)
         .setFitIntercept(formula.hasIntercept)
+        .setStandardization(standardize)
         .setSolver(solver)
       case "binomial" => new LogisticRegression()
         .setRegParam(lambda)
         .setElasticNetParam(alpha)
         .setFitIntercept(formula.hasIntercept)
+        .setStandardization(standardize)
     }
     val pipeline = new Pipeline().setStages(Array(formula, estimator))
     pipeline.fit(df)

From f92b7b98e9998a6069996cc66ca26cbfa695fce5 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 28 Oct 2015 08:54:20 -0700
Subject: [PATCH 394/896] [SPARK-11367][ML][PYSPARK] Python LinearRegression
 should support setting solver

[SPARK-10668](https://issues.apache.org/jira/browse/SPARK-10668) has provided ```WeightedLeastSquares``` solver("normal") in ```LinearRegression``` with L2 regularization in Scala and R, Python ML ```LinearRegression``` should also support setting solver("auto", "normal", "l-bfgs")

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9328 from yanboliang/spark-11367.
---
 .../ml/param/_shared_params_code_gen.py       |  4 ++-
 python/pyspark/ml/param/shared.py             | 28 +++++++++++++++++++
 python/pyspark/ml/regression.py               | 27 ++++--------------
 3 files changed, 37 insertions(+), 22 deletions(-)

diff --git a/python/pyspark/ml/param/_shared_params_code_gen.py b/python/pyspark/ml/param/_shared_params_code_gen.py
index 7143d56330bd..070c5db01ae7 100644
--- a/python/pyspark/ml/param/_shared_params_code_gen.py
+++ b/python/pyspark/ml/param/_shared_params_code_gen.py
@@ -135,7 +135,9 @@ def get$Name(self):
          "values >= 0. The class with largest value p/t is predicted, where p is the original " +
          "probability of that class and t is the class' threshold.", None),
         ("weightCol", "weight column name. If this is not set or empty, we treat " +
-         "all instance weights as 1.0.", None)]
+         "all instance weights as 1.0.", None),
+        ("solver", "the solver algorithm for optimization. If this is not set or empty, " +
+         "default value is 'auto'.", "'auto'")]
 
     code = []
     for name, doc, defaultValueStr in shared:
diff --git a/python/pyspark/ml/param/shared.py b/python/pyspark/ml/param/shared.py
index 3a58ac87d6b6..4bdf2a8cc563 100644
--- a/python/pyspark/ml/param/shared.py
+++ b/python/pyspark/ml/param/shared.py
@@ -597,6 +597,34 @@ def getWeightCol(self):
         return self.getOrDefault(self.weightCol)
 
 
+class HasSolver(Params):
+    """
+    Mixin for param solver: the solver algorithm for optimization. If this is not set or empty, default value is 'auto'.
+    """
+
+    # a placeholder to make it appear in the generated doc
+    solver = Param(Params._dummy(), "solver", "the solver algorithm for optimization. If this is not set or empty, default value is 'auto'.")
+
+    def __init__(self):
+        super(HasSolver, self).__init__()
+        #: param for the solver algorithm for optimization. If this is not set or empty, default value is 'auto'.
+        self.solver = Param(self, "solver", "the solver algorithm for optimization. If this is not set or empty, default value is 'auto'.")
+        self._setDefault(solver='auto')
+
+    def setSolver(self, value):
+        """
+        Sets the value of :py:attr:`solver`.
+        """
+        self._paramMap[self.solver] = value
+        return self
+
+    def getSolver(self):
+        """
+        Gets the value of solver or its default value.
+        """
+        return self.getOrDefault(self.solver)
+
+
 class DecisionTreeParams(Params):
     """
     Mixin for Decision Tree parameters.
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index eeb18b3e9d29..dc68815556d4 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -33,7 +33,7 @@
 @inherit_doc
 class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
                        HasRegParam, HasTol, HasElasticNetParam, HasFitIntercept,
-                       HasStandardization):
+                       HasStandardization, HasSolver):
     """
     Linear regression.
 
@@ -50,7 +50,7 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
     >>> df = sqlContext.createDataFrame([
     ...     (1.0, Vectors.dense(1.0)),
     ...     (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
-    >>> lr = LinearRegression(maxIter=5, regParam=0.0)
+    >>> lr = LinearRegression(maxIter=5, regParam=0.0, solver="normal")
     >>> model = lr.fit(df)
     >>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
     >>> model.transform(test0).head().prediction
@@ -73,11 +73,11 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
-                 standardization=True):
+                 standardization=True, solver="auto"):
         """
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
-                 standardization=True)
+                 standardization=True, solver="auto")
         """
         super(LinearRegression, self).__init__()
         self._java_obj = self._new_java_obj(
@@ -90,11 +90,11 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
     @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
-                  standardization=True):
+                  standardization=True, solver="auto"):
         """
         setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                   maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
-                  standardization=True)
+                  standardization=True, solver="auto")
         Sets params for linear regression.
         """
         kwargs = self.setParams._input_kwargs
@@ -103,21 +103,6 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return LinearRegressionModel(java_model)
 
-    @since("1.4.0")
-    def setElasticNetParam(self, value):
-        """
-        Sets the value of :py:attr:`elasticNetParam`.
-        """
-        self._paramMap[self.elasticNetParam] = value
-        return self
-
-    @since("1.4.0")
-    def getElasticNetParam(self):
-        """
-        Gets the value of elasticNetParam or its default value.
-        """
-        return self.getOrDefault(self.elasticNetParam)
-
 
 class LinearRegressionModel(JavaModel):
     """

From 032748bb9add096e4691551ee73834f3e5363dd5 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Wed, 28 Oct 2015 09:40:05 -0700
Subject: [PATCH 395/896] [SPARK-11377] [SQL] withNewChildren should not
 convert StructType to Seq

This is minor, but I ran into while writing Datasets and while it wasn't needed for the final solution, it was super confusing so we should fix it.

Basically we recurse into `Seq` to see if they have children.  This breaks because we don't preserve the original subclass of `Seq` (and `StructType <:< Seq[StructField]`).  Since a struct can never contain children, lets just not recurse into it.

Author: Michael Armbrust <michael@databricks.com>

Closes #9334 from marmbrus/structMakeCopy.
---
 .../scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
index 7971e25188e8..35f087baccde 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.catalyst.trees
 
 import org.apache.spark.sql.catalyst.errors._
-import org.apache.spark.sql.types.DataType
+import org.apache.spark.sql.types.{StructType, DataType}
 
 /** Used by [[TreeNode.getNodeNumbered]] when traversing the tree for a given number */
 private class MutableInt(var i: Int)
@@ -176,6 +176,7 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]] extends Product {
     val remainingNewChildren = newChildren.toBuffer
     val remainingOldChildren = children.toBuffer
     val newArgs = productIterator.map {
+      case s: StructType => s // Don't convert struct types to some other type of Seq[StructField]
       // Handle Seq[TreeNode] in TreeNode parameters.
       case s: Seq[_] => s.map {
         case arg: TreeNode[_] if containsChild(arg) =>
@@ -337,6 +338,7 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]] extends Product {
              |Is otherCopyArgs specified correctly for $nodeName.
              |Exception message: ${e.getMessage}
              |ctor: $defaultCtor?
+             |types: ${newArgs.map(_.getClass).mkString(", ")}
              |args: ${newArgs.mkString(", ")}
            """.stripMargin)
     }

From 5aa05219118e3d3525fb703a4716ae8e04f3da72 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 28 Oct 2015 14:28:38 -0700
Subject: [PATCH 396/896] [SPARK-11292] [SQL] Python API for text data source

Adds DataFrameReader.text and DataFrameWriter.text.

Author: Reynold Xin <rxin@databricks.com>

Closes #9259 from rxin/SPARK-11292.
---
 python/pyspark/sql/readwriter.py      | 27 +++++++++++++++++++++++++--
 python/test_support/sql/text-test.txt |  2 ++
 2 files changed, 27 insertions(+), 2 deletions(-)
 create mode 100644 python/test_support/sql/text-test.txt

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index 93832d4c713e..97bd90c4db82 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -23,6 +23,7 @@
 from py4j.java_gateway import JavaClass
 
 from pyspark import RDD, since
+from pyspark.rdd import ignore_unicode_prefix
 from pyspark.sql.column import _to_seq
 from pyspark.sql.types import *
 
@@ -193,10 +194,22 @@ def parquet(self, *paths):
         """
         return self._df(self._jreader.parquet(_to_seq(self._sqlContext._sc, paths)))
 
+    @ignore_unicode_prefix
+    @since(1.6)
+    def text(self, path):
+        """Loads a text file and returns a [[DataFrame]] with a single string column named "text".
+
+        Each line in the text file is a new row in the resulting DataFrame.
+
+        >>> df = sqlContext.read.text('python/test_support/sql/text-test.txt')
+        >>> df.collect()
+        [Row(text=u'hello'), Row(text=u'this')]
+        """
+        return self._df(self._jreader.text(path))
+
     @since(1.5)
     def orc(self, path):
-        """
-        Loads an ORC file, returning the result as a :class:`DataFrame`.
+        """Loads an ORC file, returning the result as a :class:`DataFrame`.
 
         ::Note: Currently ORC support is only available together with
         :class:`HiveContext`.
@@ -432,6 +445,16 @@ def parquet(self, path, mode=None, partitionBy=None):
             self.partitionBy(partitionBy)
         self._jwrite.parquet(path)
 
+    @since(1.6)
+    def text(self, path):
+        """Saves the content of the DataFrame in a text file at the specified path.
+
+        The DataFrame must have only one column that is of string type.
+        Each row becomes a new line in the output file.
+        """
+        self._jwrite.text(path)
+
+    @since(1.5)
     def orc(self, path, mode=None, partitionBy=None):
         """Saves the content of the :class:`DataFrame` in ORC format at the specified path.
 
diff --git a/python/test_support/sql/text-test.txt b/python/test_support/sql/text-test.txt
new file mode 100644
index 000000000000..ae1e76c9e93a
--- /dev/null
+++ b/python/test_support/sql/text-test.txt
@@ -0,0 +1,2 @@
+hello
+this
\ No newline at end of file

From 20dfd46743401a528b70dfb7862e50ce9a3f8e02 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Wed, 28 Oct 2015 15:57:01 -0700
Subject: [PATCH 397/896] [SPARK-11363] [SQL] LeftSemiJoin should be LeftSemi
 in SparkStrategies

JIRA: https://issues.apache.org/jira/browse/SPARK-11363

In SparkStrategies some places use LeftSemiJoin. It should be LeftSemi.

cc chenghao-intel liancheng

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9318 from viirya/no-left-semi-join.
---
 .../org/apache/spark/sql/execution/SparkStrategies.scala    | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 32067266b516..86d1d390f191 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -297,11 +297,11 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
   object BroadcastNestedLoop extends Strategy {
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
       case logical.Join(
-             CanBroadcast(left), right, joinType, condition) if joinType != LeftSemiJoin =>
+             CanBroadcast(left), right, joinType, condition) if joinType != LeftSemi =>
         execution.joins.BroadcastNestedLoopJoin(
           planLater(left), planLater(right), joins.BuildLeft, joinType, condition) :: Nil
       case logical.Join(
-             left, CanBroadcast(right), joinType, condition) if joinType != LeftSemiJoin =>
+             left, CanBroadcast(right), joinType, condition) if joinType != LeftSemi =>
         execution.joins.BroadcastNestedLoopJoin(
           planLater(left), planLater(right), joins.BuildRight, joinType, condition) :: Nil
       case _ => Nil
@@ -311,7 +311,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
   object CartesianProduct extends Strategy {
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
       // TODO CartesianProduct doesn't support the Left Semi Join
-      case logical.Join(left, right, joinType, None) if joinType != LeftSemiJoin =>
+      case logical.Join(left, right, joinType, None) if joinType != LeftSemi =>
         execution.joins.CartesianProduct(planLater(left), planLater(right)) :: Nil
       case logical.Join(left, right, Inner, Some(condition)) =>
         execution.Filter(condition,

From e5b89978edf7fa52090116b9b5b53ddaeef08beb Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 29 Oct 2015 11:34:54 +0800
Subject: [PATCH 398/896] [SPARK-11376][SQL] Removes duplicated `mutableRow`
 field

This PR fixes a mistake in the code generated by `GenerateColumnAccessor`. Interestingly, although the code is illegal in Java (the class has two fields with the same name), Janino accepts it happily and accidentally works properly.

Author: Cheng Lian <lian@databricks.com>

Closes #9335 from liancheng/spark-11376.fix-generated-code.
---
 .../org/apache/spark/sql/columnar/GenerateColumnAccessor.scala  | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
index d0f5bfa1cd7b..7980a6f36d8e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
@@ -140,7 +140,6 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
         private int numRowsInBatch = 0;
 
         private scala.collection.Iterator input = null;
-        private MutableRow mutableRow = null;
         private DataType[] columnTypes = null;
         private int[] columnIndexes = null;
 
@@ -156,7 +155,6 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
 
         public void initialize(Iterator input, DataType[] columnTypes, int[] columnIndexes) {
           this.input = input;
-          this.mutableRow = mutableRow;
           this.columnTypes = columnTypes;
           this.columnIndexes = columnIndexes;
         }

From 0cb7662d8683c913c4fff02e8fb0ec75261d9731 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 28 Oct 2015 21:35:57 -0700
Subject: [PATCH 399/896] [SPARK-11351] [SQL] support hive interval literal

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9304 from cloud-fan/interval.
---
 .../apache/spark/sql/catalyst/SqlParser.scala | 71 +++++++++++++------
 .../spark/sql/catalyst/SqlParserSuite.scala   | 52 ++++++++++++++
 2 files changed, 103 insertions(+), 20 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 833368b7d589..0fef04302714 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -322,7 +322,7 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
   protected lazy val literal: Parser[Literal] =
     ( numericLiteral
     | booleanLiteral
-    | stringLit ^^ {case s => Literal.create(s, StringType) }
+    | stringLit ^^ { case s => Literal.create(s, StringType) }
     | intervalLiteral
     | NULL ^^^ Literal.create(null, NullType)
     )
@@ -349,13 +349,12 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
   protected lazy val integral: Parser[String] =
     sign.? ~ numericLit ^^ { case s ~ n => s.getOrElse("") + n }
 
-  private def intervalUnit(unitName: String) =
-    acceptIf {
-      case lexical.Identifier(str) =>
-        val normalized = lexical.normalizeKeyword(str)
-        normalized == unitName || normalized == unitName + "s"
-      case _ => false
-    } {_ => "wrong interval unit"}
+  private def intervalUnit(unitName: String) = acceptIf {
+    case lexical.Identifier(str) =>
+      val normalized = lexical.normalizeKeyword(str)
+      normalized == unitName || normalized == unitName + "s"
+    case _ => false
+  } {_ => "wrong interval unit"}
 
   protected lazy val month: Parser[Int] =
     integral <~ intervalUnit("month") ^^ { case num => num.toInt }
@@ -396,21 +395,53 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
       case num => num.toLong * CalendarInterval.MICROS_PER_WEEK
     }
 
+  private def intervalKeyword(keyword: String) = acceptIf {
+    case lexical.Identifier(str) =>
+      lexical.normalizeKeyword(str) == keyword
+    case _ => false
+  } {_ => "wrong interval keyword"}
+
   protected lazy val intervalLiteral: Parser[Literal] =
-    INTERVAL ~> year.? ~ month.? ~ week.? ~ day.? ~ hour.? ~ minute.? ~ second.? ~
-      millisecond.? ~ microsecond.? ^^ {
-        case year ~ month ~ week ~ day ~ hour ~ minute ~ second ~
+    ( INTERVAL ~> stringLit <~ intervalKeyword("year") ~ intervalKeyword("to") ~
+        intervalKeyword("month") ^^ { case s =>
+      Literal(CalendarInterval.fromYearMonthString(s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("day") ~ intervalKeyword("to") ~
+        intervalKeyword("second") ^^ { case s =>
+      Literal(CalendarInterval.fromDayTimeString(s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("year") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("year", s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("month") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("month", s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("day") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("day", s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("hour") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("hour", s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("minute") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("minute", s))
+    }
+    | INTERVAL ~> stringLit <~ intervalKeyword("second") ^^ { case s =>
+      Literal(CalendarInterval.fromSingleUnitString("second", s))
+    }
+    | INTERVAL ~> year.? ~ month.? ~ week.? ~ day.? ~ hour.? ~ minute.? ~ second.? ~
+        millisecond.? ~ microsecond.? ^^ { case year ~ month ~ week ~ day ~ hour ~ minute ~ second ~
           millisecond ~ microsecond =>
-          if (!Seq(year, month, week, day, hour, minute, second,
-            millisecond, microsecond).exists(_.isDefined)) {
-            throw new AnalysisException(
-              "at least one time unit should be given for interval literal")
-          }
-          val months = Seq(year, month).map(_.getOrElse(0)).sum
-          val microseconds = Seq(week, day, hour, minute, second, millisecond, microsecond)
-            .map(_.getOrElse(0L)).sum
-          Literal.create(new CalendarInterval(months, microseconds), CalendarIntervalType)
+      if (!Seq(year, month, week, day, hour, minute, second,
+        millisecond, microsecond).exists(_.isDefined)) {
+        throw new AnalysisException(
+          "at least one time unit should be given for interval literal")
       }
+      val months = Seq(year, month).map(_.getOrElse(0)).sum
+      val microseconds = Seq(week, day, hour, minute, second, millisecond, microsecond)
+        .map(_.getOrElse(0L)).sum
+      Literal(new CalendarInterval(months, microseconds))
+    }
+    )
 
   private def toNarrowestIntegerType(value: String): Any = {
     val bigIntValue = BigDecimal(value)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
index 79b4846cb954..ea28bfa021be 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
@@ -21,6 +21,7 @@ import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
 import org.apache.spark.sql.catalyst.expressions.{Literal, GreaterThan, Not, Attribute}
 import org.apache.spark.sql.catalyst.plans.PlanTest
 import org.apache.spark.sql.catalyst.plans.logical.{OneRowRelation, Project, LogicalPlan, Command}
+import org.apache.spark.unsafe.types.CalendarInterval
 
 private[sql] case class TestCommand(cmd: String) extends LogicalPlan with Command {
   override def output: Seq[Attribute] = Seq.empty
@@ -74,4 +75,55 @@ class SqlParserSuite extends PlanTest {
       OneRowRelation)
     comparePlans(parsed, expected)
   }
+
+  test("support hive interval literal") {
+    def checkInterval(sql: String, result: CalendarInterval): Unit = {
+      val parsed = SqlParser.parse(sql)
+      val expected = Project(
+        UnresolvedAlias(
+          Literal(result)
+        ) :: Nil,
+        OneRowRelation)
+      comparePlans(parsed, expected)
+    }
+
+    def checkYearMonth(lit: String): Unit = {
+      checkInterval(
+        s"SELECT INTERVAL '$lit' YEAR TO MONTH",
+        CalendarInterval.fromYearMonthString(lit))
+    }
+
+    def checkDayTime(lit: String): Unit = {
+      checkInterval(
+        s"SELECT INTERVAL '$lit' DAY TO SECOND",
+        CalendarInterval.fromDayTimeString(lit))
+    }
+
+    def checkSingleUnit(lit: String, unit: String): Unit = {
+      checkInterval(
+        s"SELECT INTERVAL '$lit' $unit",
+        CalendarInterval.fromSingleUnitString(unit, lit))
+    }
+
+    checkYearMonth("123-10")
+    checkYearMonth("496-0")
+    checkYearMonth("-2-3")
+    checkYearMonth("-123-0")
+
+    checkDayTime("99 11:22:33.123456789")
+    checkDayTime("-99 11:22:33.123456789")
+    checkDayTime("10 9:8:7.123456789")
+    checkDayTime("1 0:0:0")
+    checkDayTime("-1 0:0:0")
+    checkDayTime("1 0:0:1")
+
+    for (unit <- Seq("year", "month", "day", "hour", "minute", "second")) {
+      checkSingleUnit("7", unit)
+      checkSingleUnit("-7", unit)
+      checkSingleUnit("0", unit)
+    }
+
+    checkSingleUnit("13.123456789", "second")
+    checkSingleUnit("-13.123456789", "second")
+  }
 }

From 3dfa4ea526c881373eeffe541bc378d1fa598129 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Wed, 28 Oct 2015 21:45:00 -0700
Subject: [PATCH 400/896] [SPARK-11322] [PYSPARK] Keep full stack trace in
 captured exception

JIRA: https://issues.apache.org/jira/browse/SPARK-11322

As reported by JoshRosen in [databricks/spark-redshift/issues/89](https://github.com/databricks/spark-redshift/issues/89#issuecomment-149828308), the exception-masking behavior sometimes makes debugging harder. To deal with this issue, we should keep full stack trace in the captured exception.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9283 from viirya/py-exception-stacktrace.
---
 python/pyspark/sql/tests.py |  6 ++++++
 python/pyspark/sql/utils.py | 19 +++++++++++++++----
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index 6356d4bd6669..4c03a0d4ffe9 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -1079,6 +1079,12 @@ def test_capture_illegalargument_exception(self):
         df = self.sqlCtx.createDataFrame([(1, 2)], ["a", "b"])
         self.assertRaisesRegexp(IllegalArgumentException, "1024 is not in the permitted values",
                                 lambda: df.select(sha2(df.a, 1024)).collect())
+        try:
+            df.select(sha2(df.a, 1024)).collect()
+        except IllegalArgumentException as e:
+            self.assertRegexpMatches(e.desc, "1024 is not in the permitted values")
+            self.assertRegexpMatches(e.stackTrace,
+                                     "org.apache.spark.sql.functions")
 
     def test_with_column_with_existing_name(self):
         keys = self.df.withColumn("key", self.df.key).select("key").collect()
diff --git a/python/pyspark/sql/utils.py b/python/pyspark/sql/utils.py
index 0f795ca35b38..c4fda8bd3b89 100644
--- a/python/pyspark/sql/utils.py
+++ b/python/pyspark/sql/utils.py
@@ -18,13 +18,22 @@
 import py4j
 
 
-class AnalysisException(Exception):
+class CapturedException(Exception):
+    def __init__(self, desc, stackTrace):
+        self.desc = desc
+        self.stackTrace = stackTrace
+
+    def __str__(self):
+        return repr(self.desc)
+
+
+class AnalysisException(CapturedException):
     """
     Failed to analyze a SQL query plan.
     """
 
 
-class IllegalArgumentException(Exception):
+class IllegalArgumentException(CapturedException):
     """
     Passed an illegal or inappropriate argument.
     """
@@ -36,10 +45,12 @@ def deco(*a, **kw):
             return f(*a, **kw)
         except py4j.protocol.Py4JJavaError as e:
             s = e.java_exception.toString()
+            stackTrace = '\n\t at '.join(map(lambda x: x.toString(),
+                                             e.java_exception.getStackTrace()))
             if s.startswith('org.apache.spark.sql.AnalysisException: '):
-                raise AnalysisException(s.split(': ', 1)[1])
+                raise AnalysisException(s.split(': ', 1)[1], stackTrace)
             if s.startswith('java.lang.IllegalArgumentException: '):
-                raise IllegalArgumentException(s.split(': ', 1)[1])
+                raise IllegalArgumentException(s.split(': ', 1)[1], stackTrace)
             raise
     return deco
 

From 87f28fc24003ad60c52f899d10f38032631624dc Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 29 Oct 2015 11:17:03 +0100
Subject: [PATCH 401/896] [SPARK-11379][SQL] ExpressionEncoder can't handle top
 level primitive type correctly

For inner primitive type(e.g. inside `Product`), we use `schemaFor` to get the catalyst type for it, https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala#L403.

However, for top level primitive type, we use `dataTypeFor`, which is wrong.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9337 from cloud-fan/encoder.
---
 .../scala/org/apache/spark/sql/catalyst/ScalaReflection.scala   | 2 +-
 .../spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala    | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 9cbb7c2ffdc7..0b8a8abd02d6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -170,7 +170,7 @@ trait ScalaReflection {
         .getOrElse(BoundReference(ordinal, dataType, false))
 
     /** Returns the current path or throws an error. */
-    def getPath = path.getOrElse(BoundReference(0, dataTypeFor(tpe), true))
+    def getPath = path.getOrElse(BoundReference(0, schemaFor(tpe).dataType, true))
 
     tpe match {
       case t if !dataTypeFor(t).isInstanceOf[ObjectType] =>
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index a374da4da1f0..b0dacf7f555e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -57,6 +57,7 @@ class ExpressionEncoderSuite extends SparkFunSuite {
   encodeDecodeTest(false)
   encodeDecodeTest(1.toShort)
   encodeDecodeTest(1.toByte)
+  encodeDecodeTest("hello")
 
   encodeDecodeTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
 

From f79ebf2a9e99575908dad6f7a14c8cfcffdebd91 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 29 Oct 2015 11:49:45 +0100
Subject: [PATCH 402/896] [SPARK-11370] [SQL] fix a bug in GroupedIterator and
 create unit test for it

Before this PR, user has to consume the iterator of one group before process next group, or we will get into infinite loops.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9330 from cloud-fan/group.
---
 .../spark/sql/execution/GroupedIterator.scala | 99 ++++++++++++-------
 .../sql/execution/GroupedIteratorSuite.scala  | 82 +++++++++++++++
 2 files changed, 144 insertions(+), 37 deletions(-)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/GroupedIteratorSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
index 10742cf7348f..6a8850129f1a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/GroupedIterator.scala
@@ -27,7 +27,7 @@ object GroupedIterator {
       keyExpressions: Seq[Expression],
       inputSchema: Seq[Attribute]): Iterator[(InternalRow, Iterator[InternalRow])] = {
     if (input.hasNext) {
-      new GroupedIterator(input, keyExpressions, inputSchema)
+      new GroupedIterator(input.buffered, keyExpressions, inputSchema)
     } else {
       Iterator.empty
     }
@@ -64,7 +64,7 @@ object GroupedIterator {
  * @param inputSchema The schema of the rows in the `input` iterator.
  */
 class GroupedIterator private(
-    input: Iterator[InternalRow],
+    input: BufferedIterator[InternalRow],
     groupingExpressions: Seq[Expression],
     inputSchema: Seq[Attribute])
   extends Iterator[(InternalRow, Iterator[InternalRow])] {
@@ -83,10 +83,17 @@ class GroupedIterator private(
 
   /** Holds a copy of an input row that is in the current group. */
   var currentGroup = currentRow.copy()
-  var currentIterator: Iterator[InternalRow] = null
+
   assert(keyOrdering.compare(currentGroup, currentRow) == 0)
+  var currentIterator = createGroupValuesIterator()
 
-  // Return true if we already have the next iterator or fetching a new iterator is successful.
+  /**
+   * Return true if we already have the next iterator or fetching a new iterator is successful.
+   *
+   * Note that, if we get the iterator by `next`, we should consume it before call `hasNext`,
+   * because we will consume the input data to skip to next group while fetching a new iterator,
+   * thus make the previous iterator empty.
+   */
   def hasNext: Boolean = currentIterator != null || fetchNextGroupIterator
 
   def next(): (InternalRow, Iterator[InternalRow]) = {
@@ -96,46 +103,64 @@ class GroupedIterator private(
     ret
   }
 
-  def fetchNextGroupIterator(): Boolean = {
-    if (currentRow != null || input.hasNext) {
-      val inputIterator = new Iterator[InternalRow] {
-        // Return true if we have a row and it is in the current group, or if fetching a new row is
-        // successful.
-        def hasNext = {
-          (currentRow != null && keyOrdering.compare(currentGroup, currentRow) == 0) ||
-            fetchNextRowInGroup()
-        }
+  private def fetchNextGroupIterator(): Boolean = {
+    assert(currentIterator == null)
+
+    if (currentRow == null && input.hasNext) {
+      currentRow = input.next()
+    }
+
+    if (currentRow == null) {
+      // These is no data left, return false.
+      false
+    } else {
+      // Skip to next group.
+      while (input.hasNext && keyOrdering.compare(currentGroup, currentRow) == 0) {
+        currentRow = input.next()
+      }
+
+      if (keyOrdering.compare(currentGroup, currentRow) == 0) {
+        // We are in the last group, there is no more groups, return false.
+        false
+      } else {
+        // Now the `currentRow` is the first row of next group.
+        currentGroup = currentRow.copy()
+        currentIterator = createGroupValuesIterator()
+        true
+      }
+    }
+  }
+
+  private def createGroupValuesIterator(): Iterator[InternalRow] = {
+    new Iterator[InternalRow] {
+      def hasNext: Boolean = currentRow != null || fetchNextRowInGroup()
+
+      def next(): InternalRow = {
+        assert(hasNext)
+        val res = currentRow
+        currentRow = null
+        res
+      }
 
-        def fetchNextRowInGroup(): Boolean = {
-          if (currentRow != null || input.hasNext) {
+      private def fetchNextRowInGroup(): Boolean = {
+        assert(currentRow == null)
+
+        if (input.hasNext) {
+          // The inner iterator should NOT consume the input into next group, here we use `head` to
+          // peek the next input, to see if we should continue to process it.
+          if (keyOrdering.compare(currentGroup, input.head) == 0) {
+            // Next input is in the current group.  Continue the inner iterator.
             currentRow = input.next()
-            if (keyOrdering.compare(currentGroup, currentRow) == 0) {
-              // The row is in the current group.  Continue the inner iterator.
-              true
-            } else {
-              // We got a row, but its not in the right group.  End this inner iterator and prepare
-              // for the next group.
-              currentIterator = null
-              currentGroup = currentRow.copy()
-              false
-            }
+            true
           } else {
-            // There is no more input so we are done.
+            // Next input is not in the right group.  End this inner iterator.
             false
           }
-        }
-
-        def next(): InternalRow = {
-          assert(hasNext) // Ensure we have fetched the next row.
-          val res = currentRow
-          currentRow = null
-          res
+        } else {
+          // There is no more data, return false.
+          false
         }
       }
-      currentIterator = inputIterator
-      true
-    } else {
-      false
     }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/GroupedIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/GroupedIteratorSuite.scala
new file mode 100644
index 000000000000..e7a08481cfa8
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/GroupedIteratorSuite.scala
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.encoders.RowEncoder
+import org.apache.spark.sql.types.{LongType, StringType, IntegerType, StructType}
+
+class GroupedIteratorSuite extends SparkFunSuite {
+
+  test("basic") {
+    val schema = new StructType().add("i", IntegerType).add("s", StringType)
+    val encoder = RowEncoder(schema)
+    val input = Seq(Row(1, "a"), Row(1, "b"), Row(2, "c"))
+    val grouped = GroupedIterator(input.iterator.map(encoder.toRow),
+      Seq('i.int.at(0)), schema.toAttributes)
+
+    val result = grouped.map {
+      case (key, data) =>
+        assert(key.numFields == 1)
+        key.getInt(0) -> data.map(encoder.fromRow).toSeq
+    }.toSeq
+
+    assert(result ==
+      1 -> Seq(input(0), input(1)) ::
+      2 -> Seq(input(2)) :: Nil)
+  }
+
+  test("group by 2 columns") {
+    val schema = new StructType().add("i", IntegerType).add("l", LongType).add("s", StringType)
+    val encoder = RowEncoder(schema)
+
+    val input = Seq(
+      Row(1, 2L, "a"),
+      Row(1, 2L, "b"),
+      Row(1, 3L, "c"),
+      Row(2, 1L, "d"),
+      Row(3, 2L, "e"))
+
+    val grouped = GroupedIterator(input.iterator.map(encoder.toRow),
+      Seq('i.int.at(0), 'l.long.at(1)), schema.toAttributes)
+
+    val result = grouped.map {
+      case (key, data) =>
+        assert(key.numFields == 2)
+        (key.getInt(0), key.getLong(1), data.map(encoder.fromRow).toSeq)
+    }.toSeq
+
+    assert(result ==
+      (1, 2L, Seq(input(0), input(1))) ::
+      (1, 3L, Seq(input(2))) ::
+      (2, 1L, Seq(input(3))) ::
+      (3, 2L, Seq(input(4))) :: Nil)
+  }
+
+  test("do nothing to the value iterator") {
+    val schema = new StructType().add("i", IntegerType).add("s", StringType)
+    val encoder = RowEncoder(schema)
+    val input = Seq(Row(1, "a"), Row(1, "b"), Row(2, "c"))
+    val grouped = GroupedIterator(input.iterator.map(encoder.toRow),
+      Seq('i.int.at(0)), schema.toAttributes)
+
+    assert(grouped.length == 2)
+  }
+}

From f304f9c9a1c954b3b5786f90bb13f543637d3192 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Thu, 29 Oct 2015 15:02:13 +0100
Subject: [PATCH 403/896] [SPARK-11318] Include hive profile in
 make-distribution.sh command

Author: tedyu <yuzhihong@gmail.com>

Closes #9281 from tedyu/master.
---
 docs/building-spark.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/building-spark.md b/docs/building-spark.md
index 743643cbcc62..4f73adb85446 100644
--- a/docs/building-spark.md
+++ b/docs/building-spark.md
@@ -38,7 +38,7 @@ To create a Spark distribution like those distributed by the
 to be runnable, use `make-distribution.sh` in the project root directory. It can be configured 
 with Maven profile settings and so on like the direct Maven build. Example:
 
-    ./make-distribution.sh --name custom-spark --tgz -Phadoop-2.4 -Pyarn
+    ./make-distribution.sh --name custom-spark --tgz -Psparkr -Phadoop-2.4 -Phive -Phive-thriftserver -Pyarn
     
 For more information on usage, run `./make-distribution.sh --help`
 

From 3bb2a8d7508b507edfcc21bd20912b0ff4a0a248 Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Thu, 29 Oct 2015 15:11:00 +0100
Subject: [PATCH 404/896] [SPARK-11388][BUILD] Fix self closing tags.

Java 8 javadoc does not like self closing tags: ```<p/>```, ```<br/>```, ...

This PR fixes those.

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9339 from hvanhovell/SPARK-11388.
---
 .../java/org/apache/spark/launcher/SparkAppHandle.java    | 4 ++--
 .../java/org/apache/spark/launcher/SparkLauncher.java     | 8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
index 2896a91d5e79..13dd9f1739fb 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
@@ -19,7 +19,7 @@
 
 /**
  * A handle to a running Spark application.
- * <p/>
+ * <p>
  * Provides runtime information about the underlying Spark application, and actions to control it.
  *
  * @since 1.6.0
@@ -110,7 +110,7 @@ public interface Listener {
      * Callback for changes in the handle's state.
      *
      * @param handle The updated handle.
-     * @see {@link SparkAppHandle#getState()}
+     * @see SparkAppHandle#getState()
      */
     void stateChanged(SparkAppHandle handle);
 
diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java b/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
index 5d74b37033a5..dd1c93af6ca4 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkLauncher.java
@@ -350,7 +350,7 @@ public SparkLauncher setVerbose(boolean verbose) {
 
   /**
    * Launches a sub-process that will start the configured Spark application.
-   * <p/>
+   * <p>
    * The {@link #startApplication(SparkAppHandle.Listener...)} method is preferred when launching
    * Spark, since it provides better control of the child application.
    *
@@ -362,16 +362,16 @@ public Process launch() throws IOException {
 
   /**
    * Starts a Spark application.
-   * <p/>
+   * <p>
    * This method returns a handle that provides information about the running application and can
    * be used to do basic interaction with it.
-   * <p/>
+   * <p>
    * The returned handle assumes that the application will instantiate a single SparkContext
    * during its lifetime. Once that context reports a final state (one that indicates the
    * SparkContext has stopped), the handle will not perform new state transitions, so anything
    * that happens after that cannot be monitored. If the underlying application is launched as
    * a child process, {@link SparkAppHandle#kill()} can still be used to kill the child process.
-   * <p/>
+   * <p>
    * Currently, all applications are launched as child processes. The child's stdout and stderr
    * are merged and written to a logger (see <code>java.util.logging</code>). The logger's name
    * can be defined by setting {@link #CHILD_PROCESS_LOGGER_NAME} in the app's configuration. If

From f7a51deebad1b4c3b970a051f25d286110b94438 Mon Sep 17 00:00:00 2001
From: xin Wu <xinwu@us.ibm.com>
Date: Thu, 29 Oct 2015 07:42:46 -0700
Subject: [PATCH 405/896] [SPARK-11246] [SQL] Table cache for Parquet broken in
 1.5

The root cause is that when spark.sql.hive.convertMetastoreParquet=true by default, the cached InMemoryRelation of the ParquetRelation can not be looked up from the cachedData of CacheManager because the key comparison fails even though it is the same LogicalPlan representing the Subquery that wraps the ParquetRelation.
The solution in this PR is overriding the LogicalPlan.sameResult function in Subquery case class to eliminate subquery node first before directly comparing the child (ParquetRelation), which will find the key  to the cached InMemoryRelation.

Author: xin Wu <xinwu@us.ibm.com>

Closes #9326 from xwu0226/spark-11246-commit.
---
 .../sql/execution/datasources/LogicalRelation.scala   |  5 +++++
 .../org/apache/spark/sql/hive/CachedTableSuite.scala  | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
index 783252e0a297..219dae88e515 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/LogicalRelation.scala
@@ -62,6 +62,11 @@ case class LogicalRelation(
     case _ => false
   }
 
+  // When comparing two LogicalRelations from within LogicalPlan.sameResult, we only need
+  // LogicalRelation.cleanArgs to return Seq(relation), since expectedOutputAttribute's
+  // expId can be different but the relation is still the same.
+  override lazy val cleanArgs: Seq[Any] = Seq(relation)
+
   @transient override lazy val statistics: Statistics = Statistics(
     sizeInBytes = BigInt(relation.sizeInBytes)
   )
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
index 9adb3780a2c5..5c2fc7d82ffb 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.hive
 import java.io.File
 
 import org.apache.spark.sql.columnar.InMemoryColumnarTableScan
+import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.sql.{AnalysisException, QueryTest, SaveMode}
 import org.apache.spark.storage.RDDBlockId
@@ -203,4 +204,14 @@ class CachedTableSuite extends QueryTest with TestHiveSingleton {
     sql("DROP TABLE refreshTable")
     Utils.deleteRecursively(tempPath)
   }
+
+  test("SPARK-11246 cache parquet table") {
+    sql("CREATE TABLE cachedTable STORED AS PARQUET AS SELECT 1")
+
+    cacheTable("cachedTable")
+    val sparkPlan = sql("SELECT * FROM cachedTable").queryExecution.sparkPlan
+    assert(sparkPlan.collect { case e: InMemoryColumnarTableScan => e }.size === 1)
+
+    sql("DROP TABLE cachedTable")
+  }
 }

From 8185f038c13c72e1bea7b0921b84125b7a352139 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Thu, 29 Oct 2015 18:29:50 +0100
Subject: [PATCH 406/896] [SPARK-11188][SQL] Elide stacktraces in bin/spark-sql
 for AnalysisExceptions

Only print the error message to the console for Analysis Exceptions in sql-shell.

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #9194 from dilipbiswal/spark-11188.
---
 .../sql/hive/thriftserver/SparkSQLCLIDriver.scala    | 10 +++++++++-
 .../spark/sql/hive/thriftserver/SparkSQLDriver.scala | 11 ++++++++---
 .../spark/sql/hive/thriftserver/CliSuite.scala       | 12 ++++++++++--
 3 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
index b5073961a1c8..62e912c69abc 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
@@ -20,6 +20,8 @@ package org.apache.spark.sql.hive.thriftserver
 import java.io._
 import java.util.{ArrayList => JArrayList, Locale}
 
+import org.apache.spark.sql.AnalysisException
+
 import scala.collection.JavaConverters._
 
 import jline.console.ConsoleReader
@@ -298,6 +300,7 @@ private[hive] class SparkSQLCLIDriver extends CliDriver with Logging {
 
           driver.init()
           val out = sessionState.out
+          val err = sessionState.err
           val start: Long = System.currentTimeMillis()
           if (sessionState.getIsVerbose) {
             out.println(cmd)
@@ -308,7 +311,12 @@ private[hive] class SparkSQLCLIDriver extends CliDriver with Logging {
 
           ret = rc.getResponseCode
           if (ret != 0) {
-            console.printError(rc.getErrorMessage())
+            // For analysis exception, only the error is printed out to the console.
+            rc.getException() match {
+              case e : AnalysisException =>
+                err.println(s"""Error in query: ${e.getMessage}""")
+              case _ => err.println(rc.getErrorMessage())
+            }
             driver.close()
             return ret
           }
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLDriver.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLDriver.scala
index 2619286afc14..f1ec7238520a 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLDriver.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLDriver.scala
@@ -18,6 +18,8 @@
 package org.apache.spark.sql.hive.thriftserver
 
 import java.util.{Arrays, ArrayList => JArrayList, List => JList}
+import org.apache.log4j.LogManager
+import org.apache.spark.sql.AnalysisException
 
 import scala.collection.JavaConverters._
 
@@ -63,9 +65,12 @@ private[hive] class SparkSQLDriver(
       tableSchema = getResultSetSchema(execution)
       new CommandProcessorResponse(0)
     } catch {
-      case cause: Throwable =>
-        logError(s"Failed in [$command]", cause)
-        new CommandProcessorResponse(1, ExceptionUtils.getStackTrace(cause), null)
+        case ae: AnalysisException =>
+          logDebug(s"Failed in [$command]", ae)
+          new CommandProcessorResponse(1, ExceptionUtils.getStackTrace(ae), null, ae)
+        case cause: Throwable =>
+          logError(s"Failed in [$command]", cause)
+          new CommandProcessorResponse(1, ExceptionUtils.getStackTrace(cause), null, cause)
     }
   }
 
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
index 76d1591a235c..3fa5c8528b60 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
@@ -58,7 +58,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
    * @param timeout maximum time for the commands to complete
    * @param extraArgs any extra arguments
    * @param errorResponses a sequence of strings whose presence in the stdout of the forked process
-   *                       is taken as an immediate error condition. That is: if a line beginning
+   *                       is taken as an immediate error condition. That is: if a line containing
    *                       with one of these strings is found, fail the test immediately.
    *                       The default value is `Seq("Error:")`
    *
@@ -104,7 +104,7 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
         }
       } else {
         errorResponses.foreach { r =>
-          if (line.startsWith(r)) {
+          if (line.contains(r)) {
             foundAllExpectedAnswers.tryFailure(
               new RuntimeException(s"Failed with error line '$line'"))
           }
@@ -219,4 +219,12 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
         -> "OK"
     )
   }
+
+  test("SPARK-11188 Analysis error reporting") {
+    runCliWithin(timeout = 2.minute,
+      errorResponses = Seq("AnalysisException"))(
+      "select * from nonexistent_table;"
+        -> "Error in query: Table not found: nonexistent_table;"
+    )
+  }
 }

From a01cbf5daac148f39cd97299780f542abc41d1e9 Mon Sep 17 00:00:00 2001
From: sethah <seth.hendrickson16@gmail.com>
Date: Thu, 29 Oct 2015 11:58:39 -0700
Subject: [PATCH 407/896] [SPARK-10641][SQL] Add Skewness and Kurtosis Support

Implementing skewness and kurtosis support based on following algorithm:
https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Higher-order_statistics

Author: sethah <seth.hendrickson16@gmail.com>

Closes #9003 from sethah/SPARK-10641.
---
 .../catalyst/analysis/FunctionRegistry.scala  |   5 +
 .../catalyst/analysis/HiveTypeCoercion.scala  |   5 +
 .../spark/sql/catalyst/dsl/package.scala      |   5 +
 .../expressions/aggregate/functions.scala     | 329 ++++++++++++++++++
 .../expressions/aggregate/utils.scala         |  30 ++
 .../sql/catalyst/expressions/aggregates.scala |  95 +++++
 .../org/apache/spark/sql/GroupedData.scala    |  65 ++++
 .../org/apache/spark/sql/functions.scala      | 115 +++++-
 .../spark/sql/DataFrameAggregateSuite.scala   |  73 ++++
 .../org/apache/spark/sql/QueryTest.scala      |  48 +++
 .../org/apache/spark/sql/SQLQuerySuite.scala  |  63 +++-
 .../execution/HiveCompatibilitySuite.scala    |   1 -
 12 files changed, 823 insertions(+), 11 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index 3dce6c1a27e8..ed9fcfe014f0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -189,6 +189,11 @@ object FunctionRegistry {
     expression[StddevPop]("stddev_pop"),
     expression[StddevSamp]("stddev_samp"),
     expression[Sum]("sum"),
+    expression[Variance]("variance"),
+    expression[VariancePop]("var_pop"),
+    expression[VarianceSamp]("var_samp"),
+    expression[Skewness]("skewness"),
+    expression[Kurtosis]("kurtosis"),
 
     // string functions
     expression[Ascii]("ascii"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 1140150f6686..3c675672dab8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -300,6 +300,11 @@ object HiveTypeCoercion {
       case Stddev(e @ StringType()) => Stddev(Cast(e, DoubleType))
       case StddevPop(e @ StringType()) => StddevPop(Cast(e, DoubleType))
       case StddevSamp(e @ StringType()) => StddevSamp(Cast(e, DoubleType))
+      case Variance(e @ StringType()) => Variance(Cast(e, DoubleType))
+      case VariancePop(e @ StringType()) => VariancePop(Cast(e, DoubleType))
+      case VarianceSamp(e @ StringType()) => VarianceSamp(Cast(e, DoubleType))
+      case Skewness(e @ StringType()) => Skewness(Cast(e, DoubleType))
+      case Kurtosis(e @ StringType()) => Kurtosis(Cast(e, DoubleType))
     }
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
index 27b3cd84b384..787f67a297e3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
@@ -162,6 +162,11 @@ package object dsl {
     def stddev(e: Expression): Expression = Stddev(e)
     def stddev_pop(e: Expression): Expression = StddevPop(e)
     def stddev_samp(e: Expression): Expression = StddevSamp(e)
+    def variance(e: Expression): Expression = Variance(e)
+    def var_pop(e: Expression): Expression = VariancePop(e)
+    def var_samp(e: Expression): Expression = VarianceSamp(e)
+    def skewness(e: Expression): Expression = Skewness(e)
+    def kurtosis(e: Expression): Expression = Kurtosis(e)
 
     implicit class DslSymbol(sym: Symbol) extends ImplicitAttribute { def s: String = sym.name }
     // TODO more implicit class for literal?
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 515246d34424..281404f285a9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -930,3 +930,332 @@ object HyperLogLogPlusPlus {
   )
   // scalastyle:on
 }
+
+/**
+ * A central moment is the expected value of a specified power of the deviation of a random
+ * variable from the mean. Central moments are often used to characterize the properties of about
+ * the shape of a distribution.
+ *
+ * This class implements online, one-pass algorithms for computing the central moments of a set of
+ * points.
+ *
+ * Behavior:
+ *  - null values are ignored
+ *  - returns `Double.NaN` when the column contains `Double.NaN` values
+ *
+ * References:
+ *  - Xiangrui Meng.  "Simpler Online Updates for Arbitrary-Order Central Moments."
+ *      2015. http://arxiv.org/abs/1510.04923
+ *
+ * @see [[https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+ *     Algorithms for calculating variance (Wikipedia)]]
+ *
+ * @param child to compute central moments of.
+ */
+abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate with Serializable {
+
+  /**
+   * The central moment order to be computed.
+   */
+  protected def momentOrder: Int
+
+  override def children: Seq[Expression] = Seq(child)
+
+  override def nullable: Boolean = false
+
+  override def dataType: DataType = DoubleType
+
+  // Expected input data type.
+  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
+  // new version at planning time (after analysis phase). For now, NullType is added at here
+  // to make it resolved when we have cases like `select avg(null)`.
+  // We can use our analyzer to cast NullType to the default data type of the NumericType once
+  // we remove the old aggregate functions. Then, we will not need NullType at here.
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+
+  override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
+
+  /**
+   * Size of aggregation buffer.
+   */
+  private[this] val bufferSize = 5
+
+  override val aggBufferAttributes: Seq[AttributeReference] = Seq.tabulate(bufferSize) { i =>
+    AttributeReference(s"M$i", DoubleType)()
+  }
+
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
+
+  // buffer offsets
+  private[this] val nOffset = mutableAggBufferOffset
+  private[this] val meanOffset = mutableAggBufferOffset + 1
+  private[this] val secondMomentOffset = mutableAggBufferOffset + 2
+  private[this] val thirdMomentOffset = mutableAggBufferOffset + 3
+  private[this] val fourthMomentOffset = mutableAggBufferOffset + 4
+
+  // frequently used values for online updates
+  private[this] var delta = 0.0
+  private[this] var deltaN = 0.0
+  private[this] var delta2 = 0.0
+  private[this] var deltaN2 = 0.0
+  private[this] var n = 0.0
+  private[this] var mean = 0.0
+  private[this] var m2 = 0.0
+  private[this] var m3 = 0.0
+  private[this] var m4 = 0.0
+
+  /**
+   * Initialize all moments to zero.
+   */
+  override def initialize(buffer: MutableRow): Unit = {
+    for (aggIndex <- 0 until bufferSize) {
+      buffer.setDouble(mutableAggBufferOffset + aggIndex, 0.0)
+    }
+  }
+
+  /**
+   * Update the central moments buffer.
+   */
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val v = Cast(child, DoubleType).eval(input)
+    if (v != null) {
+      val updateValue = v match {
+        case d: Double => d
+      }
+
+      n = buffer.getDouble(nOffset)
+      mean = buffer.getDouble(meanOffset)
+
+      n += 1.0
+      buffer.setDouble(nOffset, n)
+      delta = updateValue - mean
+      deltaN = delta / n
+      mean += deltaN
+      buffer.setDouble(meanOffset, mean)
+
+      if (momentOrder >= 2) {
+        m2 = buffer.getDouble(secondMomentOffset)
+        m2 += delta * (delta - deltaN)
+        buffer.setDouble(secondMomentOffset, m2)
+      }
+
+      if (momentOrder >= 3) {
+        delta2 = delta * delta
+        deltaN2 = deltaN * deltaN
+        m3 = buffer.getDouble(thirdMomentOffset)
+        m3 += -3.0 * deltaN * m2 + delta * (delta2 - deltaN2)
+        buffer.setDouble(thirdMomentOffset, m3)
+      }
+
+      if (momentOrder >= 4) {
+        m4 = buffer.getDouble(fourthMomentOffset)
+        m4 += -4.0 * deltaN * m3 - 6.0 * deltaN2 * m2 +
+          delta * (delta * delta2 - deltaN * deltaN2)
+        buffer.setDouble(fourthMomentOffset, m4)
+      }
+    }
+  }
+
+  /**
+   * Merge two central moment buffers.
+   */
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    val n1 = buffer1.getDouble(nOffset)
+    val n2 = buffer2.getDouble(inputAggBufferOffset)
+    val mean1 = buffer1.getDouble(meanOffset)
+    val mean2 = buffer2.getDouble(inputAggBufferOffset + 1)
+
+    var secondMoment1 = 0.0
+    var secondMoment2 = 0.0
+
+    var thirdMoment1 = 0.0
+    var thirdMoment2 = 0.0
+
+    var fourthMoment1 = 0.0
+    var fourthMoment2 = 0.0
+
+    n = n1 + n2
+    buffer1.setDouble(nOffset, n)
+    delta = mean2 - mean1
+    deltaN = if (n == 0.0) 0.0 else delta / n
+    mean = mean1 + deltaN * n2
+    buffer1.setDouble(mutableAggBufferOffset + 1, mean)
+
+    // higher order moments computed according to:
+    // https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Higher-order_statistics
+    if (momentOrder >= 2) {
+      secondMoment1 = buffer1.getDouble(secondMomentOffset)
+      secondMoment2 = buffer2.getDouble(inputAggBufferOffset + 2)
+      m2 = secondMoment1 + secondMoment2 + delta * deltaN * n1 * n2
+      buffer1.setDouble(secondMomentOffset, m2)
+    }
+
+    if (momentOrder >= 3) {
+      thirdMoment1 = buffer1.getDouble(thirdMomentOffset)
+      thirdMoment2 = buffer2.getDouble(inputAggBufferOffset + 3)
+      m3 = thirdMoment1 + thirdMoment2 + deltaN * deltaN * delta * n1 * n2 *
+        (n1 - n2) + 3.0 * deltaN * (n1 * secondMoment2 - n2 * secondMoment1)
+      buffer1.setDouble(thirdMomentOffset, m3)
+    }
+
+    if (momentOrder >= 4) {
+      fourthMoment1 = buffer1.getDouble(fourthMomentOffset)
+      fourthMoment2 = buffer2.getDouble(inputAggBufferOffset + 4)
+      m4 = fourthMoment1 + fourthMoment2 + deltaN * deltaN * deltaN * delta * n1 *
+        n2 * (n1 * n1 - n1 * n2 + n2 * n2) + deltaN * deltaN * 6.0 *
+        (n1 * n1 * secondMoment2 + n2 * n2 * secondMoment1) +
+        4.0 * deltaN * (n1 * thirdMoment2 - n2 * thirdMoment1)
+      buffer1.setDouble(fourthMomentOffset, m4)
+    }
+  }
+
+  /**
+   * Compute aggregate statistic from sufficient moments.
+   * @param centralMoments Length `momentOrder + 1` array of central moments (un-normalized)
+   *                       needed to compute the aggregate stat.
+   */
+  def getStatistic(n: Double, mean: Double, centralMoments: Array[Double]): Double
+
+  override final def eval(buffer: InternalRow): Any = {
+    val n = buffer.getDouble(nOffset)
+    val mean = buffer.getDouble(meanOffset)
+    val moments = Array.ofDim[Double](momentOrder + 1)
+    moments(0) = 1.0
+    moments(1) = 0.0
+    if (momentOrder >= 2) {
+      moments(2) = buffer.getDouble(secondMomentOffset)
+    }
+    if (momentOrder >= 3) {
+      moments(3) = buffer.getDouble(thirdMomentOffset)
+    }
+    if (momentOrder >= 4) {
+      moments(4) = buffer.getDouble(fourthMomentOffset)
+    }
+
+    getStatistic(n, mean, moments)
+  }
+}
+
+case class Variance(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "variance"
+
+  override protected val momentOrder = 2
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
+
+    if (n == 0.0) Double.NaN else moments(2) / n
+  }
+}
+
+case class VarianceSamp(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "variance_samp"
+
+  override protected val momentOrder = 2
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
+
+    if (n == 0.0 || n == 1.0) Double.NaN else moments(2) / (n - 1.0)
+  }
+}
+
+case class VariancePop(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "variance_pop"
+
+  override protected val momentOrder = 2
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
+
+    if (n == 0.0) Double.NaN else moments(2) / n
+  }
+}
+
+case class Skewness(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "skewness"
+
+  override protected val momentOrder = 3
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
+    val m2 = moments(2)
+    val m3 = moments(3)
+    if (n == 0.0 || m2 == 0.0) {
+      Double.NaN
+    } else {
+      math.sqrt(n) * m3 / math.sqrt(m2 * m2 * m2)
+    }
+  }
+}
+
+case class Kurtosis(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "kurtosis"
+
+  override protected val momentOrder = 4
+
+  // NOTE: this is the formula for excess kurtosis, which is default for R and SciPy
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
+    val m2 = moments(2)
+    val m4 = moments(4)
+    if (n == 0.0 || m2 == 0.0) {
+      Double.NaN
+    } else {
+      n * m4 / (m2 * m2) - 3.0
+    }
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
index 12bdab091580..c911ec53f1ba 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
@@ -67,6 +67,12 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = false)
 
+        case expressions.Kurtosis(child) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.Kurtosis(child),
+            mode = aggregate.Complete,
+            isDistinct = false)
+
         case expressions.Last(child, ignoreNulls) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.Last(child, ignoreNulls),
@@ -85,6 +91,12 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = false)
 
+        case expressions.Skewness(child) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.Skewness(child),
+            mode = aggregate.Complete,
+            isDistinct = false)
+
         case expressions.Stddev(child) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.Stddev(child),
@@ -120,6 +132,24 @@ object Utils {
             aggregateFunction = aggregate.HyperLogLogPlusPlus(child, rsd),
             mode = aggregate.Complete,
             isDistinct = false)
+
+        case expressions.Variance(child) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.Variance(child),
+            mode = aggregate.Complete,
+            isDistinct = false)
+
+        case expressions.VariancePop(child) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.VariancePop(child),
+            mode = aggregate.Complete,
+            isDistinct = false)
+
+        case expressions.VarianceSamp(child) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.VarianceSamp(child),
+            mode = aggregate.Complete,
+            isDistinct = false)
       }
       // Check if there is any expressions.AggregateExpression1 left.
       // If so, we cannot convert this plan.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index 70819be5af5b..c1bab6d36ab2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -991,3 +991,98 @@ case class StddevFunction(
     }
   }
 }
+
+// placeholder
+case class Kurtosis(child: Expression) extends UnaryExpression with AggregateExpression1 {
+
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
+      "please set spark.sql.useAggregate2 = true")
+  }
+
+  override def nullable: Boolean = false
+
+  override def dataType: DoubleType.type = DoubleType
+
+  override def foldable: Boolean = false
+
+  override def prettyName: String = "kurtosis"
+
+  override def toString: String = s"KURTOSIS($child)"
+}
+
+// placeholder
+case class Skewness(child: Expression) extends UnaryExpression with AggregateExpression1 {
+
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
+      "please set spark.sql.useAggregate2 = true")
+  }
+
+  override def nullable: Boolean = false
+
+  override def dataType: DoubleType.type = DoubleType
+
+  override def foldable: Boolean = false
+
+  override def prettyName: String = "skewness"
+
+  override def toString: String = s"SKEWNESS($child)"
+}
+
+// placeholder
+case class Variance(child: Expression) extends UnaryExpression with AggregateExpression1 {
+
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
+      "please set spark.sql.useAggregate2 = true")
+  }
+
+  override def nullable: Boolean = false
+
+  override def dataType: DoubleType.type = DoubleType
+
+  override def foldable: Boolean = false
+
+  override def prettyName: String = "variance"
+
+  override def toString: String = s"VARIANCE($child)"
+}
+
+// placeholder
+case class VariancePop(child: Expression) extends UnaryExpression with AggregateExpression1 {
+
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
+      "please set spark.sql.useAggregate2 = true")
+  }
+
+  override def nullable: Boolean = false
+
+  override def dataType: DoubleType.type = DoubleType
+
+  override def foldable: Boolean = false
+
+  override def prettyName: String = "variance_pop"
+
+  override def toString: String = s"VAR_POP($child)"
+}
+
+// placeholder
+case class VarianceSamp(child: Expression) extends UnaryExpression with AggregateExpression1 {
+
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
+      "please set spark.sql.useAggregate2 = true")
+  }
+
+  override def nullable: Boolean = false
+
+  override def dataType: DoubleType.type = DoubleType
+
+  override def foldable: Boolean = false
+
+  override def prettyName: String = "variance_samp"
+
+  override def toString: String = s"VAR_SAMP($child)"
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index 102b802ad0a0..dc96384a4d28 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -127,7 +127,12 @@ class GroupedData protected[sql](
       case "stddev" => Stddev
       case "stddev_pop" => StddevPop
       case "stddev_samp" => StddevSamp
+      case "variance" => Variance
+      case "var_pop" => VariancePop
+      case "var_samp" => VarianceSamp
       case "sum" => Sum
+      case "skewness" => Skewness
+      case "kurtosis" => Kurtosis
       case "count" | "size" =>
         // Turn count(*) into count(1)
         (inputExpr: Expression) => inputExpr match {
@@ -250,6 +255,30 @@ class GroupedData protected[sql](
     aggregateNumericColumns(colNames : _*)(Average)
   }
 
+  /**
+   * Compute the skewness for each numeric columns for each group.
+   * The resulting [[DataFrame]] will also contain the grouping columns.
+   * When specified columns are given, only compute the skewness values for them.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def skewness(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(Skewness)
+  }
+
+  /**
+   * Compute the kurtosis for each numeric columns for each group.
+   * The resulting [[DataFrame]] will also contain the grouping columns.
+   * When specified columns are given, only compute the kurtosis values for them.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def kurtosis(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(Kurtosis)
+  }
+
   /**
    * Compute the max value for each numeric columns for each group.
    * The resulting [[DataFrame]] will also contain the grouping columns.
@@ -333,4 +362,40 @@ class GroupedData protected[sql](
   def sum(colNames: String*): DataFrame = {
     aggregateNumericColumns(colNames : _*)(Sum)
   }
+
+  /**
+   * Compute the sample variance for each numeric columns for each group.
+   * The resulting [[DataFrame]] will also contain the grouping columns.
+   * When specified columns are given, only compute the variance for them.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def variance(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(Variance)
+  }
+
+  /**
+   * Compute the population variance for each numeric columns for each group.
+   * The resulting [[DataFrame]] will also contain the grouping columns.
+   * When specified columns are given, only compute the variance for them.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def var_pop(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(VariancePop)
+  }
+
+  /**
+   * Compute the sample variance for each numeric columns for each group.
+   * The resulting [[DataFrame]] will also contain the grouping columns.
+   * When specified columns are given, only compute the variance for them.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def var_samp(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(VarianceSamp)
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 15c864a8ab64..c1737b1ef663 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -228,6 +228,22 @@ object functions {
    */
   def first(columnName: String): Column = first(Column(columnName))
 
+  /**
+   * Aggregate function: returns the kurtosis of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def kurtosis(e: Column): Column = Kurtosis(e.expr)
+
+  /**
+   * Aggregate function: returns the kurtosis of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def kurtosis(columnName: String): Column = kurtosis(Column(columnName))
+
   /**
    * Aggregate function: returns the last value in a group.
    *
@@ -295,8 +311,24 @@ object functions {
   def min(columnName: String): Column = min(Column(columnName))
 
   /**
-   * Aggregate function: returns the unbiased sample standard deviation
-   * of the expression in a group.
+   * Aggregate function: returns the skewness of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def skewness(e: Column): Column = Skewness(e.expr)
+
+  /**
+   * Aggregate function: returns the skewness of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def skewness(columnName: String): Column = skewness(Column(columnName))
+
+  /**
+   * Aggregate function: returns the unbiased sample standard deviation of
+   * the expression in a group.
    *
    * @group agg_funcs
    * @since 1.6.0
@@ -304,13 +336,13 @@ object functions {
   def stddev(e: Column): Column = Stddev(e.expr)
 
   /**
-   * Aggregate function: returns the population standard deviation of
+   * Aggregate function: returns the unbiased sample standard deviation of
    * the expression in a group.
    *
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev_pop(e: Column): Column = StddevPop(e.expr)
+  def stddev(columnName: String): Column = stddev(Column(columnName))
 
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
@@ -321,6 +353,33 @@ object functions {
    */
   def stddev_samp(e: Column): Column = StddevSamp(e.expr)
 
+  /**
+   * Aggregate function: returns the unbiased sample standard deviation of
+   * the expression in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def stddev_samp(columnName: String): Column = stddev_samp(Column(columnName))
+
+  /**
+   * Aggregate function: returns the population standard deviation of
+   * the expression in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def stddev_pop(e: Column): Column = StddevPop(e.expr)
+
+  /**
+   * Aggregate function: returns the population standard deviation of
+   * the expression in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def stddev_pop(columnName: String): Column = stddev_pop(Column(columnName))
+
   /**
    * Aggregate function: returns the sum of all values in the expression.
    *
@@ -353,6 +412,54 @@ object functions {
    */
   def sumDistinct(columnName: String): Column = sumDistinct(Column(columnName))
 
+  /**
+   * Aggregate function: returns the population variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def variance(e: Column): Column = Variance(e.expr)
+
+  /**
+   * Aggregate function: returns the population variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def variance(columnName: String): Column = variance(Column(columnName))
+
+  /**
+   * Aggregate function: returns the unbiased variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def var_samp(e: Column): Column = VarianceSamp(e.expr)
+
+  /**
+   * Aggregate function: returns the unbiased variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def var_samp(columnName: String): Column = var_samp(Column(columnName))
+
+  /**
+   * Aggregate function: returns the population variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def var_pop(e: Column): Column = VariancePop(e.expr)
+
+  /**
+   * Aggregate function: returns the population variance of the values in a group.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def var_pop(columnName: String): Column = var_pop(Column(columnName))
+
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Window functions
   //////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index f5ef9ffd7f4f..9b23977c765d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -221,4 +221,77 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
       emptyTableData.agg(sumDistinct('a)),
       Row(null))
   }
+
+  test("moments") {
+    val absTol = 1e-8
+
+    val sparkVariance = testData2.agg(variance('a))
+    val expectedVariance = Row(4.0 / 6.0)
+    checkAggregatesWithTol(sparkVariance, expectedVariance, absTol)
+    val sparkVariancePop = testData2.agg(var_pop('a))
+    checkAggregatesWithTol(sparkVariancePop, expectedVariance, absTol)
+
+    val sparkVarianceSamp = testData2.agg(var_samp('a))
+    val expectedVarianceSamp = Row(4.0 / 5.0)
+    checkAggregatesWithTol(sparkVarianceSamp, expectedVarianceSamp, absTol)
+
+    val sparkSkewness = testData2.agg(skewness('a))
+    val expectedSkewness = Row(0.0)
+    checkAggregatesWithTol(sparkSkewness, expectedSkewness, absTol)
+
+    val sparkKurtosis = testData2.agg(kurtosis('a))
+    val expectedKurtosis = Row(-1.5)
+    checkAggregatesWithTol(sparkKurtosis, expectedKurtosis, absTol)
+
+  }
+
+  test("zero moments") {
+    val emptyTableData = Seq((1, 2)).toDF("a", "b")
+    assert(emptyTableData.count() === 1)
+
+    checkAnswer(
+      emptyTableData.agg(variance('a)),
+      Row(0.0))
+
+    checkAnswer(
+      emptyTableData.agg(var_samp('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(var_pop('a)),
+      Row(0.0))
+
+    checkAnswer(
+      emptyTableData.agg(skewness('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(kurtosis('a)),
+      Row(Double.NaN))
+  }
+
+  test("null moments") {
+    val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
+    assert(emptyTableData.count() === 0)
+
+    checkAnswer(
+      emptyTableData.agg(variance('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(var_samp('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(var_pop('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(skewness('a)),
+      Row(Double.NaN))
+
+    checkAnswer(
+      emptyTableData.agg(kurtosis('a)),
+      Row(Double.NaN))
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index 73e02eb0d957..3c174efe73ff 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -134,6 +134,32 @@ abstract class QueryTest extends PlanTest {
     checkAnswer(df, expectedAnswer.collect())
   }
 
+  /**
+   * Runs the plan and makes sure the answer is within absTol of the expected result.
+   * @param dataFrame the [[DataFrame]] to be executed
+   * @param expectedAnswer the expected result in a [[Seq]] of [[Row]]s.
+   * @param absTol the absolute tolerance between actual and expected answers.
+   */
+  protected def checkAggregatesWithTol(dataFrame: DataFrame,
+      expectedAnswer: Seq[Row],
+      absTol: Double): Unit = {
+    // TODO: catch exceptions in data frame execution
+    val actualAnswer = dataFrame.collect()
+    require(actualAnswer.length == expectedAnswer.length,
+      s"actual num rows ${actualAnswer.length} != expected num of rows ${expectedAnswer.length}")
+
+    actualAnswer.zip(expectedAnswer).foreach {
+      case (actualRow, expectedRow) =>
+        QueryTest.checkAggregatesWithTol(actualRow, expectedRow, absTol)
+    }
+  }
+
+  protected def checkAggregatesWithTol(dataFrame: DataFrame,
+      expectedAnswer: Row,
+      absTol: Double): Unit = {
+    checkAggregatesWithTol(dataFrame, Seq(expectedAnswer), absTol)
+  }
+
   /**
    * Asserts that a given [[DataFrame]] will be executed using the given number of cached results.
    */
@@ -214,6 +240,28 @@ object QueryTest {
     return None
   }
 
+  /**
+   * Runs the plan and makes sure the answer is within absTol of the expected result.
+   * @param actualAnswer the actual result in a [[Row]].
+   * @param expectedAnswer the expected result in a[[Row]].
+   * @param absTol the absolute tolerance between actual and expected answers.
+   */
+  protected def checkAggregatesWithTol(actualAnswer: Row, expectedAnswer: Row, absTol: Double) = {
+    require(actualAnswer.length == expectedAnswer.length,
+      s"actual answer length ${actualAnswer.length} != " +
+        s"expected answer length ${expectedAnswer.length}")
+
+    // TODO: support other numeric types besides Double
+    // TODO: support struct types?
+    actualAnswer.toSeq.zip(expectedAnswer.toSeq).foreach {
+      case (actual: Double, expected: Double) =>
+        assert(math.abs(actual - expected) < absTol,
+          s"actual answer $actual not within $absTol of correct answer $expected")
+      case (actual, expected) =>
+        assert(actual == expected, s"$actual did not equal $expected")
+    }
+  }
+
   def checkAnswer(df: DataFrame, expectedAnswer: java.util.List[Row]): String = {
     checkAnswer(df, expectedAnswer.asScala) match {
       case Some(errorMessage) => errorMessage
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index f5ae3ae49b46..5a616fac0bc2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -523,8 +523,9 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
 
   test("aggregates with nulls") {
     checkAnswer(
-      sql("SELECT MIN(a), MAX(a), AVG(a), STDDEV(a), SUM(a), COUNT(a) FROM nullInts"),
-      Row(1, 3, 2, 1, 6, 3)
+      sql("SELECT SKEWNESS(a), KURTOSIS(a), MIN(a), MAX(a)," +
+        "AVG(a), VARIANCE(a), STDDEV(a), SUM(a), COUNT(a) FROM nullInts"),
+      Row(0, -1.5, 1, 3, 2, 2.0 / 3.0, 1, 6, 3)
     )
   }
 
@@ -717,14 +718,14 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   test("stddev") {
     checkAnswer(
       sql("SELECT STDDEV(a) FROM testData2"),
-      Row(math.sqrt(4/5.0))
+      Row(math.sqrt(4.0 / 5.0))
     )
   }
 
   test("stddev_pop") {
     checkAnswer(
       sql("SELECT STDDEV_POP(a) FROM testData2"),
-      Row(math.sqrt(4/6.0))
+      Row(math.sqrt(4.0 / 6.0))
     )
   }
 
@@ -735,10 +736,60 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     )
   }
 
+  test("var_samp") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT VAR_SAMP(a) FROM testData2")
+    val expectedAnswer = Row(4.0 / 5.0)
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
+  test("variance") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT VARIANCE(a) FROM testData2")
+    val expectedAnswer = Row(4.0 / 6.0)
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
+  test("var_pop") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT VAR_POP(a) FROM testData2")
+    val expectedAnswer = Row(4.0 / 6.0)
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
+  test("skewness") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT skewness(a) FROM testData2")
+    val expectedAnswer = Row(0.0)
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
+  test("kurtosis") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT kurtosis(a) FROM testData2")
+    val expectedAnswer = Row(-1.5)
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
   test("stddev agg") {
     checkAnswer(
-      sql("SELECT a, stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2 GROUP BY a"),
-      (1 to 3).map(i => Row(i, math.sqrt(1/2.0), math.sqrt(1/4.0), math.sqrt(1/2.0))))
+        sql("SELECT a, stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2 GROUP BY a"),
+      (1 to 3).map(i => Row(i, math.sqrt(1.0 / 2.0), math.sqrt(1.0 / 4.0), math.sqrt(1.0 / 2.0))))
+  }
+
+  test("variance agg") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT a, variance(b), var_samp(b), var_pop(b)" +
+      "FROM testData2 GROUP BY a")
+    val expectedAnswer = (1 to 3).map(i => Row(i, 1.0 / 4.0, 1.0 / 2.0, 1.0 / 4.0))
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+  }
+
+  test("skewness and kurtosis agg") {
+    val absTol = 1e-8
+    val sparkAnswer = sql("SELECT a, skewness(b), kurtosis(b) FROM testData2 GROUP BY a")
+    val expectedAnswer = (1 to 3).map(i => Row(i, 0.0, -2.0))
+    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
   }
 
   test("inner join where, one match per row") {
diff --git a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
index eed9e436f9af..9e357bf348c9 100644
--- a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
+++ b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
@@ -467,7 +467,6 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
     "escape_orderby1",
     "escape_sortby1",
     "explain_rearrange",
-    "fetch_aggregation",
     "fileformat_mix",
     "fileformat_sequencefile",
     "fileformat_text",

From f21ef8dbb2ef6526b8b47e18b9d8d91dd520c086 Mon Sep 17 00:00:00 2001
From: teramonagi <teramonagi@gmail.com>
Date: Thu, 29 Oct 2015 10:54:04 -0700
Subject: [PATCH 408/896] [SPARK-10532][EC2] Added --profile option to specify
 the name of profile

"profiles" give us the way that you can specify the set of credentials you want to use when you initialize a connection to AWS.

You can keep multiple sets of credentials in the same credentials files using different profile names.
For example, you can use --profile option to do that when you use "aws cli tool".

http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html

Author: teramonagi <teramonagi@gmail.com>

Closes #8696 from teramonagi/SPARK-10532.
---
 ec2/spark_ec2.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/ec2/spark_ec2.py b/ec2/spark_ec2.py
index 3a2361c6d6d2..9327e21e43db 100755
--- a/ec2/spark_ec2.py
+++ b/ec2/spark_ec2.py
@@ -181,6 +181,10 @@ def parse_args():
     parser.add_option(
         "-i", "--identity-file",
         help="SSH private key file to use for logging into instances")
+    parser.add_option(
+        "-p", "--profile", default=None,
+        help="If you have multiple profiles (AWS or boto config), you can configure " +
+             "additional, named profiles by using this option (default: %default)")
     parser.add_option(
         "-t", "--instance-type", default="m1.large",
         help="Type of instance to launch (default: %default). " +
@@ -1315,7 +1319,10 @@ def real_main():
         sys.exit(1)
 
     try:
-        conn = ec2.connect_to_region(opts.region)
+        if opts.profile is None:
+            conn = ec2.connect_to_region(opts.region)
+        else:
+            conn = ec2.connect_to_region(opts.region, profile_name=opts.profile)
     except Exception as e:
         print((e), file=stderr)
         sys.exit(1)

From 4f5e60c647d7d6827438721b7fabbc3a57b81023 Mon Sep 17 00:00:00 2001
From: Calvin Jia <jia.calvin@gmail.com>
Date: Thu, 29 Oct 2015 15:13:38 -0700
Subject: [PATCH 409/896] [SPARK-11236][CORE] Update Tachyon dependency from
 0.7.1 -> 0.8.0.

Upgrades the tachyon-client version to the latest release.

No new dependencies are added and no spark facing APIs are changed. The removal of the `tachyon-underfs-s3` exclusion will enable users to use S3 out of the box and there are no longer any additional external dependencies added by the module.

Author: Calvin Jia <jia.calvin@gmail.com>

Closes #9204 from calvinjia/spark-11236.
---
 core/pom.xml         | 6 +-----
 make-distribution.sh | 8 ++++----
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/core/pom.xml b/core/pom.xml
index 319a50049a82..dff40e91ad22 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -266,7 +266,7 @@
     <dependency>
       <groupId>org.tachyonproject</groupId>
       <artifactId>tachyon-client</artifactId>
-      <version>0.7.1</version>
+      <version>0.8.0</version>
       <exclusions>
         <exclusion>
           <groupId>org.apache.hadoop</groupId>
@@ -288,10 +288,6 @@
           <groupId>org.tachyonproject</groupId>
           <artifactId>tachyon-underfs-glusterfs</artifactId>
         </exclusion>
-        <exclusion>
-          <groupId>org.tachyonproject</groupId>
-          <artifactId>tachyon-underfs-s3</artifactId>
-        </exclusion>
       </exclusions>
     </dependency>
     <dependency>
diff --git a/make-distribution.sh b/make-distribution.sh
index 24418ace2627..f6766784813c 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -33,9 +33,9 @@ SPARK_HOME="$(cd "`dirname "$0"`"; pwd)"
 DISTDIR="$SPARK_HOME/dist"
 
 SPARK_TACHYON=false
-TACHYON_VERSION="0.7.1"
+TACHYON_VERSION="0.8.0"
 TACHYON_TGZ="tachyon-${TACHYON_VERSION}-bin.tar.gz"
-TACHYON_URL="https://github.com/amplab/tachyon/releases/download/v${TACHYON_VERSION}/${TACHYON_TGZ}"
+TACHYON_URL="http://tachyon-project.org/downloads/files/${TACHYON_VERSION}/${TACHYON_TGZ}"
 
 MAKE_TGZ=false
 NAME=none
@@ -240,10 +240,10 @@ if [ "$SPARK_TACHYON" == "true" ]; then
   fi
 
   tar xzf "${TACHYON_TGZ}"
-  cp "tachyon-${TACHYON_VERSION}/core/target/tachyon-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
+  cp "tachyon-${TACHYON_VERSION}/assembly/target/tachyon-assemblies-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
   mkdir -p "$DISTDIR/tachyon/src/main/java/tachyon/web"
   cp -r "tachyon-${TACHYON_VERSION}"/{bin,conf,libexec} "$DISTDIR/tachyon"
-  cp -r "tachyon-${TACHYON_VERSION}"/core/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
+  cp -r "tachyon-${TACHYON_VERSION}"/servers/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
 
   if [[ `uname -a` == Darwin* ]]; then
     # need to run sed differently on osx

From 96cf87f66d47245b19e719cb83947042b21546fa Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 29 Oct 2015 16:36:52 -0700
Subject: [PATCH 410/896] [SPARK-11301] [SQL] fix case sensitivity for filter
 on partitioned columns

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9271 from cloud-fan/filter.
---
 .../execution/datasources/DataSourceStrategy.scala   | 12 +++++-------
 .../scala/org/apache/spark/sql/DataFrameSuite.scala  | 10 ++++++++++
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index ffb4645b8932..af6626c89758 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -63,16 +63,14 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     case PhysicalOperation(projects, filters, l @ LogicalRelation(t: HadoopFsRelation, _))
         if t.partitionSpec.partitionColumns.nonEmpty =>
       // We divide the filter expressions into 3 parts
-      val partitionColumnNames = t.partitionSpec.partitionColumns.map(_.name).toSet
+      val partitionColumns = AttributeSet(
+        t.partitionColumns.map(c => l.output.find(_.name == c.name).get))
 
-      // TODO this is case-sensitive
-      // Only prunning the partition keys
-      val partitionFilters =
-        filters.filter(_.references.map(_.name).toSet.subsetOf(partitionColumnNames))
+      // Only pruning the partition keys
+      val partitionFilters = filters.filter(_.references.subsetOf(partitionColumns))
 
       // Only pushes down predicates that do not reference partition keys.
-      val pushedFilters =
-        filters.filter(_.references.map(_.name).toSet.intersect(partitionColumnNames).isEmpty)
+      val pushedFilters = filters.filter(_.references.intersect(partitionColumns).isEmpty)
 
       // Predicates with both partition keys and attributes
       val combineFilters = filters.toSet -- partitionFilters.toSet -- pushedFilters.toSet
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 59565a6b13d4..c9d6e19d2ce9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -987,4 +987,14 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     val df = (1 to 10).map(Tuple1.apply).toDF("i").as("src")
     assert(df.select($"src.i".cast(StringType)).columns.head === "i")
   }
+
+  test("SPARK-11301: fix case sensitivity for filter on partitioned columns") {
+    withSQLConf(SQLConf.CASE_SENSITIVE.key -> "false") {
+      withTempPath { path =>
+        Seq(2012 -> "a").toDF("year", "val").write.partitionBy("year").parquet(path.getAbsolutePath)
+        val df = sqlContext.read.parquet(path.getAbsolutePath)
+        checkAnswer(df.filter($"yEAr" > 2000).select($"val"), Row("a"))
+      }
+    }
+  }
 }

From d89be0bf81029cd82008a959d191e1c7b6ceaa18 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Thu, 29 Oct 2015 21:01:10 -0700
Subject: [PATCH 411/896] [SPARK-11409][SPARKR] Enable url link in R doc for
 Persist

Quick one line doc fix
link is not clickable
![image](https://cloud.githubusercontent.com/assets/8969467/10833041/4e91dd7c-7e4c-11e5-8905-713b986dbbde.png)

shivaram

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9363 from felixcheung/rpersistdoc.
---
 R/pkg/R/DataFrame.R | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index c8944459542a..87a2c66ffd2a 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -357,7 +357,7 @@ setMethod("cache",
 #'
 #' Persist this DataFrame with the specified storage level. For details of the
 #' supported storage levels, refer to
-#' http://spark.apache.org/docs/latest/programming-guide.html#rdd-persistence.
+#' \url{http://spark.apache.org/docs/latest/programming-guide.html#rdd-persistence}.
 #'
 #' @param x The DataFrame to persist
 #' @rdname persist
@@ -1572,7 +1572,7 @@ setMethod("merge",
             joinRes
           })
 
-#' 
+#'
 #' Creates a list of columns by replacing the intersected ones with aliases.
 #' The name of the alias column is formed by concatanating the original column name and a suffix.
 #'

From 56419cf11f769c80f391b45dc41b3c7101cc5ff4 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 29 Oct 2015 23:38:06 -0700
Subject: [PATCH 412/896] [SPARK-10342] [SPARK-10309] [SPARK-10474]
 [SPARK-10929] [SQL] Cooperative memory management

This PR introduce a mechanism to call spill() on those SQL operators that support spilling (for example, BytesToBytesMap, UnsafeExternalSorter and ShuffleExternalSorter) if there is not enough memory for execution. The preserved first page is needed anymore, so removed.

Other Spillable objects in Spark core (ExternalSorter and AppendOnlyMap) are not included in this PR, but those could benefit from this (trigger others' spilling).

The PrepareRDD may be not needed anymore, could be removed in follow up PR.

The following script will fail with OOM before this PR, finished in 150 seconds with 2G heap (also works in 1.5 branch, with similar duration).

```python
sqlContext.setConf("spark.sql.shuffle.partitions", "1")
df = sqlContext.range(1<<25).selectExpr("id", "repeat(id, 2) as s")
df2 = df.select(df.id.alias('id2'), df.s.alias('s2'))
j = df.join(df2, df.id==df2.id2).groupBy(df.id).max("id", "id2")
j.explain()
print j.count()
```

For thread-safety, here what I'm got:

1) Without calling spill(), the operators should only be used by single thread, no safety problems.

2) spill() could be triggered in two cases, triggered by itself, or by other operators. we can check trigger == this in spill(), so it's still in the same thread, so safety problems.

3) if it's triggered by other operators (right now cache will not trigger spill()), we only spill the data into disk when it's in scanning stage (building is finished), so the in-memory sorter or memory pages are read-only, we only need to synchronize the iterator and change it.

4) During scanning, the iterator will only use one record in one page, we can't free this page, because the downstream is currently using it (used by UnsafeRow or other objects). In BytesToBytesMap, we just skip the current page, and dump all others into disk. In UnsafeExternalSorter, we keep the page that is used by current record (having the same baseObject), free it when loading the next record. In ShuffleExternalSorter, the spill() will not trigger during scanning.

5) In order to avoid deadlock, we didn't call acquireMemory during spill (so we reused the pointer array in InMemorySorter).

Author: Davies Liu <davies@databricks.com>

Closes #9241 from davies/force_spill.
---
 .../apache/spark/memory/MemoryConsumer.java   | 128 ++++++
 .../spark/memory/TaskMemoryManager.java       | 138 ++++--
 .../shuffle/sort/ShuffleExternalSorter.java   | 210 +++------
 .../shuffle/sort/ShuffleInMemorySorter.java   |  50 +-
 .../shuffle/sort/UnsafeShuffleWriter.java     |   6 -
 .../spark/unsafe/map/BytesToBytesMap.java     | 430 +++++++++++-------
 .../unsafe/sort/UnsafeExternalSorter.java     | 426 ++++++++---------
 .../unsafe/sort/UnsafeInMemorySorter.java     |  60 ++-
 .../unsafe/sort/UnsafeSorterSpillReader.java  |   6 +-
 .../unsafe/sort/UnsafeSorterSpillWriter.java  |   2 +-
 .../apache/spark/memory/MemoryManager.scala   |   9 +-
 .../spark/util/collection/Spillable.scala     |   4 +-
 .../spark/memory/TaskMemoryManagerSuite.java  |  77 +++-
 .../sort/PackedRecordPointerSuite.java        |  30 +-
 .../sort/ShuffleInMemorySorterSuite.java      |   6 +-
 .../sort/UnsafeShuffleWriterSuite.java        |  38 +-
 .../map/AbstractBytesToBytesMapSuite.java     | 149 +++++-
 .../sort/UnsafeExternalSorterSuite.java       |  97 ++--
 .../sort/UnsafeInMemorySorterSuite.java       |  20 +-
 .../scala/org/apache/spark/FailureSuite.scala |   4 +-
 .../spark/memory/MemoryManagerSuite.scala     |  60 +--
 ...yManager.scala => TestMemoryManager.scala} |  32 +-
 .../execution/UnsafeExternalRowSorter.java    |   7 +-
 .../UnsafeFixedWidthAggregationMap.java       |   2 +-
 .../sql/execution/UnsafeKVExternalSorter.java |  19 +-
 .../UnsafeFixedWidthAggregationMapSuite.scala |  22 +-
 .../UnsafeKVExternalSorterSuite.scala         |   6 +-
 .../TungstenAggregationIteratorSuite.scala    |  54 ---
 .../unsafe/memory/HeapMemoryAllocator.java    |   9 +-
 .../unsafe/memory/UnsafeMemoryAllocator.java  |   3 -
 30 files changed, 1270 insertions(+), 834 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
 rename core/src/test/scala/org/apache/spark/memory/{GrantEverythingMemoryManager.scala => TestMemoryManager.scala} (71%)
 delete mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala

diff --git a/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
new file mode 100644
index 000000000000..008799cc7739
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
@@ -0,0 +1,128 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory;
+
+
+import java.io.IOException;
+
+import org.apache.spark.unsafe.memory.MemoryBlock;
+
+
+/**
+ * An memory consumer of TaskMemoryManager, which support spilling.
+ */
+public abstract class MemoryConsumer {
+
+  private final TaskMemoryManager taskMemoryManager;
+  private final long pageSize;
+  private long used;
+
+  protected MemoryConsumer(TaskMemoryManager taskMemoryManager, long pageSize) {
+    this.taskMemoryManager = taskMemoryManager;
+    this.pageSize = pageSize;
+    this.used = 0;
+  }
+
+  protected MemoryConsumer(TaskMemoryManager taskMemoryManager) {
+    this(taskMemoryManager, taskMemoryManager.pageSizeBytes());
+  }
+
+  /**
+   * Returns the size of used memory in bytes.
+   */
+  long getUsed() {
+    return used;
+  }
+
+  /**
+   * Force spill during building.
+   *
+   * For testing.
+   */
+  public void spill() throws IOException {
+    spill(Long.MAX_VALUE, this);
+  }
+
+  /**
+   * Spill some data to disk to release memory, which will be called by TaskMemoryManager
+   * when there is not enough memory for the task.
+   *
+   * This should be implemented by subclass.
+   *
+   * Note: In order to avoid possible deadlock, should not call acquireMemory() from spill().
+   *
+   * @param size the amount of memory should be released
+   * @param trigger the MemoryConsumer that trigger this spilling
+   * @return the amount of released memory in bytes
+   * @throws IOException
+   */
+  public abstract long spill(long size, MemoryConsumer trigger) throws IOException;
+
+  /**
+   * Acquire `size` bytes memory.
+   *
+   * If there is not enough memory, throws OutOfMemoryError.
+   */
+  protected void acquireMemory(long size) {
+    long got = taskMemoryManager.acquireExecutionMemory(size, this);
+    if (got < size) {
+      taskMemoryManager.releaseExecutionMemory(got, this);
+      taskMemoryManager.showMemoryUsage();
+      throw new OutOfMemoryError("Could not acquire " + size + " bytes of memory, got " + got);
+    }
+    used += got;
+  }
+
+  /**
+   * Release `size` bytes memory.
+   */
+  protected void releaseMemory(long size) {
+    used -= size;
+    taskMemoryManager.releaseExecutionMemory(size, this);
+  }
+
+  /**
+   * Allocate a memory block with at least `required` bytes.
+   *
+   * Throws IOException if there is not enough memory.
+   *
+   * @throws OutOfMemoryError
+   */
+  protected MemoryBlock allocatePage(long required) {
+    MemoryBlock page = taskMemoryManager.allocatePage(Math.max(pageSize, required), this);
+    if (page == null || page.size() < required) {
+      long got = 0;
+      if (page != null) {
+        got = page.size();
+        freePage(page);
+      }
+      taskMemoryManager.showMemoryUsage();
+      throw new OutOfMemoryError("Unable to acquire " + required + " bytes of memory, got " + got);
+    }
+    used += page.size();
+    return page;
+  }
+
+  /**
+   * Free a memory block.
+   */
+  protected void freePage(MemoryBlock page) {
+    used -= page.size();
+    taskMemoryManager.freePage(page, this);
+  }
+}
diff --git a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
index 7b31c90dac66..4230575446d3 100644
--- a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
+++ b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
@@ -17,13 +17,18 @@
 
 package org.apache.spark.memory;
 
-import java.util.*;
+import javax.annotation.concurrent.GuardedBy;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.BitSet;
+import java.util.HashSet;
 
 import com.google.common.annotations.VisibleForTesting;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.spark.unsafe.memory.MemoryBlock;
+import org.apache.spark.util.Utils;
 
 /**
  * Manages the memory allocated by an individual task.
@@ -100,6 +105,12 @@ public class TaskMemoryManager {
    */
   private final boolean inHeap;
 
+  /**
+   * The size of memory granted to each consumer.
+   */
+  @GuardedBy("this")
+  private final HashSet<MemoryConsumer> consumers;
+
   /**
    * Construct a new TaskMemoryManager.
    */
@@ -107,23 +118,92 @@ public TaskMemoryManager(MemoryManager memoryManager, long taskAttemptId) {
     this.inHeap = memoryManager.tungstenMemoryIsAllocatedInHeap();
     this.memoryManager = memoryManager;
     this.taskAttemptId = taskAttemptId;
+    this.consumers = new HashSet<>();
   }
 
   /**
-   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   * Acquire N bytes of memory for a consumer. If there is no enough memory, it will call
+   * spill() of consumers to release more memory.
+   *
    * @return number of bytes successfully granted (<= N).
    */
-  public long acquireExecutionMemory(long size) {
-    return memoryManager.acquireExecutionMemory(size, taskAttemptId);
+  public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
+    assert(required >= 0);
+    synchronized (this) {
+      long got = memoryManager.acquireExecutionMemory(required, taskAttemptId);
+
+      // try to release memory from other consumers first, then we can reduce the frequency of
+      // spilling, avoid to have too many spilled files.
+      if (got < required) {
+        // Call spill() on other consumers to release memory
+        for (MemoryConsumer c: consumers) {
+          if (c != null && c != consumer && c.getUsed() > 0) {
+            try {
+              long released = c.spill(required - got, consumer);
+              if (released > 0) {
+                logger.info("Task {} released {} from {} for {}", taskAttemptId,
+                  Utils.bytesToString(released), c, consumer);
+                got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId);
+                if (got >= required) {
+                  break;
+                }
+              }
+            } catch (IOException e) {
+              logger.error("error while calling spill() on " + c, e);
+              throw new OutOfMemoryError("error while calling spill() on " + c + " : "
+                + e.getMessage());
+            }
+          }
+        }
+      }
+
+      // call spill() on itself
+      if (got < required && consumer != null) {
+        try {
+          long released = consumer.spill(required - got, consumer);
+          if (released > 0) {
+            logger.info("Task {} released {} from itself ({})", taskAttemptId,
+              Utils.bytesToString(released), consumer);
+            got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId);
+          }
+        } catch (IOException e) {
+          logger.error("error while calling spill() on " + consumer, e);
+          throw new OutOfMemoryError("error while calling spill() on " + consumer + " : "
+            + e.getMessage());
+        }
+      }
+
+      consumers.add(consumer);
+      logger.debug("Task {} acquire {} for {}", taskAttemptId, Utils.bytesToString(got), consumer);
+      return got;
+    }
   }
 
   /**
-   * Release N bytes of execution memory.
+   * Release N bytes of execution memory for a MemoryConsumer.
    */
-  public void releaseExecutionMemory(long size) {
+  public void releaseExecutionMemory(long size, MemoryConsumer consumer) {
+    logger.debug("Task {} release {} from {}", taskAttemptId, Utils.bytesToString(size), consumer);
     memoryManager.releaseExecutionMemory(size, taskAttemptId);
   }
 
+  /**
+   * Dump the memory usage of all consumers.
+   */
+  public void showMemoryUsage() {
+    logger.info("Memory used in task " + taskAttemptId);
+    synchronized (this) {
+      for (MemoryConsumer c: consumers) {
+        if (c.getUsed() > 0) {
+          logger.info("Acquired by " + c + ": " + Utils.bytesToString(c.getUsed()));
+        }
+      }
+    }
+  }
+
+  /**
+   * Return the page size in bytes.
+   */
   public long pageSizeBytes() {
     return memoryManager.pageSizeBytes();
   }
@@ -134,42 +214,40 @@ public long pageSizeBytes() {
    *
    * Returns `null` if there was not enough memory to allocate the page.
    */
-  public MemoryBlock allocatePage(long size) {
+  public MemoryBlock allocatePage(long size, MemoryConsumer consumer) {
     if (size > MAXIMUM_PAGE_SIZE_BYTES) {
       throw new IllegalArgumentException(
         "Cannot allocate a page with more than " + MAXIMUM_PAGE_SIZE_BYTES + " bytes");
     }
 
+    long acquired = acquireExecutionMemory(size, consumer);
+    if (acquired <= 0) {
+      return null;
+    }
+
     final int pageNumber;
     synchronized (this) {
       pageNumber = allocatedPages.nextClearBit(0);
       if (pageNumber >= PAGE_TABLE_SIZE) {
+        releaseExecutionMemory(acquired, consumer);
         throw new IllegalStateException(
           "Have already allocated a maximum of " + PAGE_TABLE_SIZE + " pages");
       }
       allocatedPages.set(pageNumber);
     }
-    final long acquiredExecutionMemory = acquireExecutionMemory(size);
-    if (acquiredExecutionMemory != size) {
-      releaseExecutionMemory(acquiredExecutionMemory);
-      synchronized (this) {
-        allocatedPages.clear(pageNumber);
-      }
-      return null;
-    }
-    final MemoryBlock page = memoryManager.tungstenMemoryAllocator().allocate(size);
+    final MemoryBlock page = memoryManager.tungstenMemoryAllocator().allocate(acquired);
     page.pageNumber = pageNumber;
     pageTable[pageNumber] = page;
     if (logger.isTraceEnabled()) {
-      logger.trace("Allocate page number {} ({} bytes)", pageNumber, size);
+      logger.trace("Allocate page number {} ({} bytes)", pageNumber, acquired);
     }
     return page;
   }
 
   /**
-   * Free a block of memory allocated via {@link TaskMemoryManager#allocatePage(long)}.
+   * Free a block of memory allocated via {@link TaskMemoryManager#allocatePage}.
    */
-  public void freePage(MemoryBlock page) {
+  public void freePage(MemoryBlock page, MemoryConsumer consumer) {
     assert (page.pageNumber != -1) :
       "Called freePage() on memory that wasn't allocated with allocatePage()";
     assert(allocatedPages.get(page.pageNumber));
@@ -182,14 +260,14 @@ public void freePage(MemoryBlock page) {
     }
     long pageSize = page.size();
     memoryManager.tungstenMemoryAllocator().free(page);
-    releaseExecutionMemory(pageSize);
+    releaseExecutionMemory(pageSize, consumer);
   }
 
   /**
    * Given a memory page and offset within that page, encode this address into a 64-bit long.
    * This address will remain valid as long as the corresponding page has not been freed.
    *
-   * @param page a data page allocated by {@link TaskMemoryManager#allocatePage(long)}/
+   * @param page a data page allocated by {@link TaskMemoryManager#allocatePage}/
    * @param offsetInPage an offset in this page which incorporates the base offset. In other words,
    *                     this should be the value that you would pass as the base offset into an
    *                     UNSAFE call (e.g. page.baseOffset() + something).
@@ -261,17 +339,17 @@ public long getOffsetInPage(long pagePlusOffsetAddress) {
    * value can be used to detect memory leaks.
    */
   public long cleanUpAllAllocatedMemory() {
-    long freedBytes = 0;
-    for (MemoryBlock page : pageTable) {
-      if (page != null) {
-        freedBytes += page.size();
-        freePage(page);
+    synchronized (this) {
+      Arrays.fill(pageTable, null);
+      for (MemoryConsumer c: consumers) {
+        if (c != null && c.getUsed() > 0) {
+          // In case of failed task, it's normal to see leaked memory
+          logger.warn("leak " + Utils.bytesToString(c.getUsed()) + " memory from " + c);
+        }
       }
+      consumers.clear();
     }
-
-    freedBytes += memoryManager.releaseAllExecutionMemoryForTask(taskAttemptId);
-
-    return freedBytes;
+    return memoryManager.releaseAllExecutionMemoryForTask(taskAttemptId);
   }
 
   /**
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
index f43236f41ae7..400d8520019b 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
@@ -31,15 +31,15 @@
 import org.apache.spark.SparkConf;
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
+import org.apache.spark.memory.MemoryConsumer;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.serializer.DummySerializerInstance;
 import org.apache.spark.serializer.SerializerInstance;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.storage.DiskBlockObjectWriter;
 import org.apache.spark.storage.TempShuffleBlockId;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 /**
@@ -58,23 +58,18 @@
  * spill files. Instead, this merging is performed in {@link UnsafeShuffleWriter}, which uses a
  * specialized merge procedure that avoids extra serialization/deserialization.
  */
-final class ShuffleExternalSorter {
+final class ShuffleExternalSorter extends MemoryConsumer {
 
   private final Logger logger = LoggerFactory.getLogger(ShuffleExternalSorter.class);
 
   @VisibleForTesting
   static final int DISK_WRITE_BUFFER_SIZE = 1024 * 1024;
 
-  private final int initialSize;
   private final int numPartitions;
-  private final int pageSizeBytes;
-  @VisibleForTesting
-  final int maxRecordSizeBytes;
   private final TaskMemoryManager taskMemoryManager;
   private final BlockManager blockManager;
   private final TaskContext taskContext;
   private final ShuffleWriteMetrics writeMetrics;
-  private long numRecordsInsertedSinceLastSpill = 0;
 
   /** Force this sorter to spill when there are this many elements in memory. For testing only */
   private final long numElementsForSpillThreshold;
@@ -98,8 +93,7 @@ final class ShuffleExternalSorter {
   // These variables are reset after spilling:
   @Nullable private ShuffleInMemorySorter inMemSorter;
   @Nullable private MemoryBlock currentPage = null;
-  private long currentPagePosition = -1;
-  private long freeSpaceInCurrentPage = 0;
+  private long pageCursor = -1;
 
   public ShuffleExternalSorter(
       TaskMemoryManager memoryManager,
@@ -108,42 +102,21 @@ public ShuffleExternalSorter(
       int initialSize,
       int numPartitions,
       SparkConf conf,
-      ShuffleWriteMetrics writeMetrics) throws IOException {
+      ShuffleWriteMetrics writeMetrics) {
+    super(memoryManager, (int) Math.min(PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES,
+      memoryManager.pageSizeBytes()));
     this.taskMemoryManager = memoryManager;
     this.blockManager = blockManager;
     this.taskContext = taskContext;
-    this.initialSize = initialSize;
-    this.peakMemoryUsedBytes = initialSize;
     this.numPartitions = numPartitions;
     // Use getSizeAsKb (not bytes) to maintain backwards compatibility if no units are provided
     this.fileBufferSizeBytes = (int) conf.getSizeAsKb("spark.shuffle.file.buffer", "32k") * 1024;
     this.numElementsForSpillThreshold =
       conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MAX_VALUE);
-    this.pageSizeBytes = (int) Math.min(
-      PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES, taskMemoryManager.pageSizeBytes());
-    this.maxRecordSizeBytes = pageSizeBytes - 4;
     this.writeMetrics = writeMetrics;
-    initializeForWriting();
-
-    // preserve first page to ensure that we have at least one page to work with. Otherwise,
-    // other operators in the same task may starve this sorter (SPARK-9709).
-    acquireNewPageIfNecessary(pageSizeBytes);
-  }
-
-  /**
-   * Allocates new sort data structures. Called when creating the sorter and after each spill.
-   */
-  private void initializeForWriting() throws IOException {
-    // TODO: move this sizing calculation logic into a static method of sorter:
-    final long memoryRequested = initialSize * 8L;
-    final long memoryAcquired = taskMemoryManager.acquireExecutionMemory(memoryRequested);
-    if (memoryAcquired != memoryRequested) {
-      taskMemoryManager.releaseExecutionMemory(memoryAcquired);
-      throw new IOException("Could not acquire " + memoryRequested + " bytes of memory");
-    }
-
+    acquireMemory(initialSize * 8L);
     this.inMemSorter = new ShuffleInMemorySorter(initialSize);
-    numRecordsInsertedSinceLastSpill = 0;
+    this.peakMemoryUsedBytes = getMemoryUsage();
   }
 
   /**
@@ -242,6 +215,8 @@ private void writeSortedFile(boolean isLastFile) throws IOException {
       }
     }
 
+    inMemSorter.reset();
+
     if (!isLastFile) {  // i.e. this is a spill file
       // The current semantics of `shuffleRecordsWritten` seem to be that it's updated when records
       // are written to disk, not when they enter the shuffle sorting code. DiskBlockObjectWriter
@@ -266,9 +241,12 @@ private void writeSortedFile(boolean isLastFile) throws IOException {
   /**
    * Sort and spill the current records in response to memory pressure.
    */
-  @VisibleForTesting
-  void spill() throws IOException {
-    assert(inMemSorter != null);
+  @Override
+  public long spill(long size, MemoryConsumer trigger) throws IOException {
+    if (trigger != this || inMemSorter == null || inMemSorter.numRecords() == 0) {
+      return 0L;
+    }
+
     logger.info("Thread {} spilling sort data of {} to disk ({} {} so far)",
       Thread.currentThread().getId(),
       Utils.bytesToString(getMemoryUsage()),
@@ -276,13 +254,9 @@ void spill() throws IOException {
       spills.size() > 1 ? " times" : " time");
 
     writeSortedFile(false);
-    final long inMemSorterMemoryUsage = inMemSorter.getMemoryUsage();
-    inMemSorter = null;
-    taskMemoryManager.releaseExecutionMemory(inMemSorterMemoryUsage);
     final long spillSize = freeMemory();
     taskContext.taskMetrics().incMemoryBytesSpilled(spillSize);
-
-    initializeForWriting();
+    return spillSize;
   }
 
   private long getMemoryUsage() {
@@ -312,18 +286,12 @@ private long freeMemory() {
     updatePeakMemoryUsed();
     long memoryFreed = 0;
     for (MemoryBlock block : allocatedPages) {
-      taskMemoryManager.freePage(block);
       memoryFreed += block.size();
-    }
-    if (inMemSorter != null) {
-      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
-      inMemSorter = null;
-      taskMemoryManager.releaseExecutionMemory(sorterMemoryUsage);
+      freePage(block);
     }
     allocatedPages.clear();
     currentPage = null;
-    currentPagePosition = -1;
-    freeSpaceInCurrentPage = 0;
+    pageCursor = 0;
     return memoryFreed;
   }
 
@@ -332,16 +300,16 @@ private long freeMemory() {
    */
   public void cleanupResources() {
     freeMemory();
+    if (inMemSorter != null) {
+      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
+      inMemSorter = null;
+      releaseMemory(sorterMemoryUsage);
+    }
     for (SpillInfo spill : spills) {
       if (spill.file.exists() && !spill.file.delete()) {
         logger.error("Unable to delete spill file {}", spill.file.getPath());
       }
     }
-    if (inMemSorter != null) {
-      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
-      inMemSorter = null;
-      taskMemoryManager.releaseExecutionMemory(sorterMemoryUsage);
-    }
   }
 
   /**
@@ -352,16 +320,27 @@ public void cleanupResources() {
   private void growPointerArrayIfNecessary() throws IOException {
     assert(inMemSorter != null);
     if (!inMemSorter.hasSpaceForAnotherRecord()) {
-      logger.debug("Attempting to expand sort pointer array");
-      final long oldPointerArrayMemoryUsage = inMemSorter.getMemoryUsage();
-      final long memoryToGrowPointerArray = oldPointerArrayMemoryUsage * 2;
-      final long memoryAcquired = taskMemoryManager.acquireExecutionMemory(memoryToGrowPointerArray);
-      if (memoryAcquired < memoryToGrowPointerArray) {
-        taskMemoryManager.releaseExecutionMemory(memoryAcquired);
-        spill();
+      long used = inMemSorter.getMemoryUsage();
+      long needed = used + inMemSorter.getMemoryToExpand();
+      try {
+        acquireMemory(needed);  // could trigger spilling
+      } catch (OutOfMemoryError e) {
+        // should have trigger spilling
+        assert(inMemSorter.hasSpaceForAnotherRecord());
+        return;
+      }
+      // check if spilling is triggered or not
+      if (inMemSorter.hasSpaceForAnotherRecord()) {
+        releaseMemory(needed);
       } else {
-        inMemSorter.expandPointerArray();
-        taskMemoryManager.releaseExecutionMemory(oldPointerArrayMemoryUsage);
+        try {
+          inMemSorter.expandPointerArray();
+          releaseMemory(used);
+        } catch (OutOfMemoryError oom) {
+          // Just in case that JVM had run out of memory
+          releaseMemory(needed);
+          spill();
+        }
       }
     }
   }
@@ -370,96 +349,46 @@ private void growPointerArrayIfNecessary() throws IOException {
    * Allocates more memory in order to insert an additional record. This will request additional
    * memory from the memory manager and spill if the requested memory can not be obtained.
    *
-   * @param requiredSpace the required space in the data page, in bytes, including space for storing
+   * @param required the required space in the data page, in bytes, including space for storing
    *                      the record size. This must be less than or equal to the page size (records
    *                      that exceed the page size are handled via a different code path which uses
    *                      special overflow pages).
    */
-  private void acquireNewPageIfNecessary(int requiredSpace) throws IOException {
-    growPointerArrayIfNecessary();
-    if (requiredSpace > freeSpaceInCurrentPage) {
-      logger.trace("Required space {} is less than free space in current page ({})", requiredSpace,
-        freeSpaceInCurrentPage);
-      // TODO: we should track metrics on the amount of space wasted when we roll over to a new page
-      // without using the free space at the end of the current page. We should also do this for
-      // BytesToBytesMap.
-      if (requiredSpace > pageSizeBytes) {
-        throw new IOException("Required space " + requiredSpace + " is greater than page size (" +
-          pageSizeBytes + ")");
-      } else {
-        currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
-        if (currentPage == null) {
-          spill();
-          currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
-          if (currentPage == null) {
-            throw new IOException("Unable to acquire " + pageSizeBytes + " bytes of memory");
-          }
-        }
-        currentPagePosition = currentPage.getBaseOffset();
-        freeSpaceInCurrentPage = pageSizeBytes;
-        allocatedPages.add(currentPage);
-      }
+  private void acquireNewPageIfNecessary(int required) {
+    if (currentPage == null ||
+      pageCursor + required > currentPage.getBaseOffset() + currentPage.size() ) {
+      // TODO: try to find space in previous pages
+      currentPage = allocatePage(required);
+      pageCursor = currentPage.getBaseOffset();
+      allocatedPages.add(currentPage);
     }
   }
 
   /**
    * Write a record to the shuffle sorter.
    */
-  public void insertRecord(
-      Object recordBaseObject,
-      long recordBaseOffset,
-      int lengthInBytes,
-      int partitionId) throws IOException {
+  public void insertRecord(Object recordBase, long recordOffset, int length, int partitionId)
+    throws IOException {
 
-    if (numRecordsInsertedSinceLastSpill > numElementsForSpillThreshold) {
+    // for tests
+    assert(inMemSorter != null);
+    if (inMemSorter.numRecords() > numElementsForSpillThreshold) {
       spill();
     }
 
     growPointerArrayIfNecessary();
     // Need 4 bytes to store the record length.
-    final int totalSpaceRequired = lengthInBytes + 4;
-
-    // --- Figure out where to insert the new record ----------------------------------------------
-
-    final MemoryBlock dataPage;
-    long dataPagePosition;
-    boolean useOverflowPage = totalSpaceRequired > pageSizeBytes;
-    if (useOverflowPage) {
-      long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
-      // The record is larger than the page size, so allocate a special overflow page just to hold
-      // that record.
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-      if (overflowPage == null) {
-        spill();
-        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-        if (overflowPage == null) {
-          throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
-        }
-      }
-      allocatedPages.add(overflowPage);
-      dataPage = overflowPage;
-      dataPagePosition = overflowPage.getBaseOffset();
-    } else {
-      // The record is small enough to fit in a regular data page, but the current page might not
-      // have enough space to hold it (or no pages have been allocated yet).
-      acquireNewPageIfNecessary(totalSpaceRequired);
-      dataPage = currentPage;
-      dataPagePosition = currentPagePosition;
-      // Update bookkeeping information
-      freeSpaceInCurrentPage -= totalSpaceRequired;
-      currentPagePosition += totalSpaceRequired;
-    }
-    final Object dataPageBaseObject = dataPage.getBaseObject();
-
-    final long recordAddress =
-      taskMemoryManager.encodePageNumberAndOffset(dataPage, dataPagePosition);
-    Platform.putInt(dataPageBaseObject, dataPagePosition, lengthInBytes);
-    dataPagePosition += 4;
-    Platform.copyMemory(
-      recordBaseObject, recordBaseOffset, dataPageBaseObject, dataPagePosition, lengthInBytes);
-    assert(inMemSorter != null);
+    final int required = length + 4;
+    acquireNewPageIfNecessary(required);
+
+    assert(currentPage != null);
+    final Object base = currentPage.getBaseObject();
+    final long recordAddress = taskMemoryManager.encodePageNumberAndOffset(currentPage, pageCursor);
+    Platform.putInt(base, pageCursor, length);
+    pageCursor += 4;
+    Platform.copyMemory(recordBase, recordOffset, base, pageCursor, length);
+    pageCursor += length;
     inMemSorter.insertRecord(recordAddress, partitionId);
-    numRecordsInsertedSinceLastSpill += 1;
   }
 
   /**
@@ -475,6 +404,9 @@ public SpillInfo[] closeAndGetSpills() throws IOException {
         // Do not count the final file towards the spill count.
         writeSortedFile(true);
         freeMemory();
+        long sorterMemoryUsage = inMemSorter.getMemoryUsage();
+        inMemSorter = null;
+        releaseMemory(sorterMemoryUsage);
       }
       return spills.toArray(new SpillInfo[spills.size()]);
     } catch (IOException e) {
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
index a8dee6c6101c..e630575d1ae1 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
@@ -37,33 +37,51 @@ public int compare(PackedRecordPointer left, PackedRecordPointer right) {
    * {@link PackedRecordPointer}. The sort operates on this array instead of directly manipulating
    * records.
    */
-  private long[] pointerArray;
+  private long[] array;
 
   /**
    * The position in the pointer array where new records can be inserted.
    */
-  private int pointerArrayInsertPosition = 0;
+  private int pos = 0;
 
   public ShuffleInMemorySorter(int initialSize) {
     assert (initialSize > 0);
-    this.pointerArray = new long[initialSize];
-    this.sorter = new Sorter<PackedRecordPointer, long[]>(ShuffleSortDataFormat.INSTANCE);
+    this.array = new long[initialSize];
+    this.sorter = new Sorter<>(ShuffleSortDataFormat.INSTANCE);
   }
 
-  public void expandPointerArray() {
-    final long[] oldArray = pointerArray;
+  public int numRecords() {
+    return pos;
+  }
+
+  public void reset() {
+    pos = 0;
+  }
+
+  private int newLength() {
     // Guard against overflow:
-    final int newLength = oldArray.length * 2 > 0 ? (oldArray.length * 2) : Integer.MAX_VALUE;
-    pointerArray = new long[newLength];
-    System.arraycopy(oldArray, 0, pointerArray, 0, oldArray.length);
+    return array.length <= Integer.MAX_VALUE / 2 ? (array.length * 2) : Integer.MAX_VALUE;
+  }
+
+  /**
+   * Returns the memory needed to expand
+   */
+  public long getMemoryToExpand() {
+    return ((long) (newLength() - array.length)) * 8;
+  }
+
+  public void expandPointerArray() {
+    final long[] oldArray = array;
+    array = new long[newLength()];
+    System.arraycopy(oldArray, 0, array, 0, oldArray.length);
   }
 
   public boolean hasSpaceForAnotherRecord() {
-    return pointerArrayInsertPosition + 1 < pointerArray.length;
+    return pos < array.length;
   }
 
   public long getMemoryUsage() {
-    return pointerArray.length * 8L;
+    return array.length * 8L;
   }
 
   /**
@@ -78,15 +96,15 @@ public long getMemoryUsage() {
    */
   public void insertRecord(long recordPointer, int partitionId) {
     if (!hasSpaceForAnotherRecord()) {
-      if (pointerArray.length == Integer.MAX_VALUE) {
+      if (array.length == Integer.MAX_VALUE) {
         throw new IllegalStateException("Sort pointer array has reached maximum size");
       } else {
         expandPointerArray();
       }
     }
-    pointerArray[pointerArrayInsertPosition] =
+    array[pos] =
         PackedRecordPointer.packPointer(recordPointer, partitionId);
-    pointerArrayInsertPosition++;
+    pos++;
   }
 
   /**
@@ -118,7 +136,7 @@ public void loadNext() {
    * Return an iterator over record pointers in sorted order.
    */
   public ShuffleSorterIterator getSortedIterator() {
-    sorter.sort(pointerArray, 0, pointerArrayInsertPosition, SORT_COMPARATOR);
-    return new ShuffleSorterIterator(pointerArrayInsertPosition, pointerArray);
+    sorter.sort(array, 0, pos, SORT_COMPARATOR);
+    return new ShuffleSorterIterator(pos, array);
   }
 }
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
index f6c5c944bd77..e19b37864293 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
@@ -127,12 +127,6 @@ public UnsafeShuffleWriter(
     open();
   }
 
-  @VisibleForTesting
-  public int maxRecordSizeBytes() {
-    assert(sorter != null);
-    return sorter.maxRecordSizeBytes;
-  }
-
   private void updatePeakMemoryUsed() {
     // sorter can be null if this writer is closed
     if (sorter != null) {
diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index f035bdac810b..e36709c6fc84 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -18,14 +18,20 @@
 package org.apache.spark.unsafe.map;
 
 import javax.annotation.Nullable;
+import java.io.File;
+import java.io.IOException;
 import java.util.Iterator;
 import java.util.LinkedList;
-import java.util.List;
 
 import com.google.common.annotations.VisibleForTesting;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.apache.spark.SparkEnv;
+import org.apache.spark.executor.ShuffleWriteMetrics;
+import org.apache.spark.memory.MemoryConsumer;
+import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.storage.BlockManager;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.array.LongArray;
@@ -33,7 +39,8 @@
 import org.apache.spark.unsafe.hash.Murmur3_x86_32;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.unsafe.memory.MemoryLocation;
-import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.util.collection.unsafe.sort.UnsafeSorterSpillReader;
+import org.apache.spark.util.collection.unsafe.sort.UnsafeSorterSpillWriter;
 
 /**
  * An append-only hash map where keys and values are contiguous regions of bytes.
@@ -54,7 +61,7 @@
  * is consistent with {@link org.apache.spark.util.collection.unsafe.sort.UnsafeExternalSorter},
  * so we can pass records from this map directly into the sorter to sort records in place.
  */
-public final class BytesToBytesMap {
+public final class BytesToBytesMap extends MemoryConsumer {
 
   private final Logger logger = LoggerFactory.getLogger(BytesToBytesMap.class);
 
@@ -62,27 +69,22 @@ public final class BytesToBytesMap {
 
   private static final HashMapGrowthStrategy growthStrategy = HashMapGrowthStrategy.DOUBLING;
 
-  /**
-   * Special record length that is placed after the last record in a data page.
-   */
-  private static final int END_OF_PAGE_MARKER = -1;
-
   private final TaskMemoryManager taskMemoryManager;
 
   /**
    * A linked list for tracking all allocated data pages so that we can free all of our memory.
    */
-  private final List<MemoryBlock> dataPages = new LinkedList<MemoryBlock>();
+  private final LinkedList<MemoryBlock> dataPages = new LinkedList<>();
 
   /**
    * The data page that will be used to store keys and values for new hashtable entries. When this
    * page becomes full, a new page will be allocated and this pointer will change to point to that
    * new page.
    */
-  private MemoryBlock currentDataPage = null;
+  private MemoryBlock currentPage = null;
 
   /**
-   * Offset into `currentDataPage` that points to the location where new data can be inserted into
+   * Offset into `currentPage` that points to the location where new data can be inserted into
    * the page. This does not incorporate the page's base offset.
    */
   private long pageCursor = 0;
@@ -116,6 +118,11 @@ public final class BytesToBytesMap {
   // full base addresses in the page table for off-heap mode so that we can reconstruct the full
   // absolute memory addresses.
 
+  /**
+   * Whether or not the longArray can grow. We will not insert more elements if it's false.
+   */
+  private boolean canGrowArray = true;
+
   /**
    * A {@link BitSet} used to track location of the map where the key is set.
    * Size of the bitset should be half of the size of the long array.
@@ -164,13 +171,20 @@ public final class BytesToBytesMap {
 
   private long peakMemoryUsedBytes = 0L;
 
+  private final BlockManager blockManager;
+  private volatile MapIterator destructiveIterator = null;
+  private LinkedList<UnsafeSorterSpillWriter> spillWriters = new LinkedList<>();
+
   public BytesToBytesMap(
       TaskMemoryManager taskMemoryManager,
+      BlockManager blockManager,
       int initialCapacity,
       double loadFactor,
       long pageSizeBytes,
       boolean enablePerfMetrics) {
+    super(taskMemoryManager, pageSizeBytes);
     this.taskMemoryManager = taskMemoryManager;
+    this.blockManager = blockManager;
     this.loadFactor = loadFactor;
     this.loc = new Location();
     this.pageSizeBytes = pageSizeBytes;
@@ -187,18 +201,13 @@ public BytesToBytesMap(
         TaskMemoryManager.MAXIMUM_PAGE_SIZE_BYTES);
     }
     allocate(initialCapacity);
-
-    // Acquire a new page as soon as we construct the map to ensure that we have at least
-    // one page to work with. Otherwise, other operators in the same task may starve this
-    // map (SPARK-9747).
-    acquireNewPage();
   }
 
   public BytesToBytesMap(
       TaskMemoryManager taskMemoryManager,
       int initialCapacity,
       long pageSizeBytes) {
-    this(taskMemoryManager, initialCapacity, 0.70, pageSizeBytes, false);
+    this(taskMemoryManager, initialCapacity, pageSizeBytes, false);
   }
 
   public BytesToBytesMap(
@@ -208,6 +217,7 @@ public BytesToBytesMap(
       boolean enablePerfMetrics) {
     this(
       taskMemoryManager,
+      SparkEnv.get() != null ? SparkEnv.get().blockManager() :  null,
       initialCapacity,
       0.70,
       pageSizeBytes,
@@ -219,61 +229,153 @@ public BytesToBytesMap(
    */
   public int numElements() { return numElements; }
 
-  public static final class BytesToBytesMapIterator implements Iterator<Location> {
+  public final class MapIterator implements Iterator<Location> {
 
-    private final int numRecords;
-    private final Iterator<MemoryBlock> dataPagesIterator;
+    private int numRecords;
     private final Location loc;
 
     private MemoryBlock currentPage = null;
-    private int currentRecordNumber = 0;
+    private int recordsInPage = 0;
     private Object pageBaseObject;
     private long offsetInPage;
 
     // If this iterator destructive or not. When it is true, it frees each page as it moves onto
     // next one.
     private boolean destructive = false;
-    private BytesToBytesMap bmap;
+    private UnsafeSorterSpillReader reader = null;
 
-    private BytesToBytesMapIterator(
-        int numRecords, Iterator<MemoryBlock> dataPagesIterator, Location loc,
-        boolean destructive, BytesToBytesMap bmap) {
+    private MapIterator(int numRecords, Location loc, boolean destructive) {
       this.numRecords = numRecords;
-      this.dataPagesIterator = dataPagesIterator;
       this.loc = loc;
       this.destructive = destructive;
-      this.bmap = bmap;
-      if (dataPagesIterator.hasNext()) {
-        advanceToNextPage();
+      if (destructive) {
+        destructiveIterator = this;
       }
     }
 
     private void advanceToNextPage() {
-      if (destructive && currentPage != null) {
-        dataPagesIterator.remove();
-        this.bmap.taskMemoryManager.freePage(currentPage);
+      synchronized (this) {
+        int nextIdx = dataPages.indexOf(currentPage) + 1;
+        if (destructive && currentPage != null) {
+          dataPages.remove(currentPage);
+          freePage(currentPage);
+          nextIdx --;
+        }
+        if (dataPages.size() > nextIdx) {
+          currentPage = dataPages.get(nextIdx);
+          pageBaseObject = currentPage.getBaseObject();
+          offsetInPage = currentPage.getBaseOffset();
+          recordsInPage = Platform.getInt(pageBaseObject, offsetInPage);
+          offsetInPage += 4;
+        } else {
+          currentPage = null;
+          if (reader != null) {
+            // remove the spill file from disk
+            File file = spillWriters.removeFirst().getFile();
+            if (file != null && file.exists()) {
+              if (!file.delete()) {
+                logger.error("Was unable to delete spill file {}", file.getAbsolutePath());
+              }
+            }
+          }
+          try {
+            reader = spillWriters.getFirst().getReader(blockManager);
+            recordsInPage = -1;
+          } catch (IOException e) {
+            // Scala iterator does not handle exception
+            Platform.throwException(e);
+          }
+        }
       }
-      currentPage = dataPagesIterator.next();
-      pageBaseObject = currentPage.getBaseObject();
-      offsetInPage = currentPage.getBaseOffset();
     }
 
     @Override
     public boolean hasNext() {
-      return currentRecordNumber != numRecords;
+      if (numRecords == 0) {
+        if (reader != null) {
+          // remove the spill file from disk
+          File file = spillWriters.removeFirst().getFile();
+          if (file != null && file.exists()) {
+            if (!file.delete()) {
+              logger.error("Was unable to delete spill file {}", file.getAbsolutePath());
+            }
+          }
+        }
+      }
+      return numRecords > 0;
     }
 
     @Override
     public Location next() {
-      int totalLength = Platform.getInt(pageBaseObject, offsetInPage);
-      if (totalLength == END_OF_PAGE_MARKER) {
+      if (recordsInPage == 0) {
         advanceToNextPage();
-        totalLength = Platform.getInt(pageBaseObject, offsetInPage);
       }
-      loc.with(currentPage, offsetInPage);
-      offsetInPage += 4 + totalLength;
-      currentRecordNumber++;
-      return loc;
+      numRecords--;
+      if (currentPage != null) {
+        int totalLength = Platform.getInt(pageBaseObject, offsetInPage);
+        loc.with(currentPage, offsetInPage);
+        offsetInPage += 4 + totalLength;
+        recordsInPage --;
+        return loc;
+      } else {
+        assert(reader != null);
+        if (!reader.hasNext()) {
+          advanceToNextPage();
+        }
+        try {
+          reader.loadNext();
+        } catch (IOException e) {
+          // Scala iterator does not handle exception
+          Platform.throwException(e);
+        }
+        loc.with(reader.getBaseObject(), reader.getBaseOffset(), reader.getRecordLength());
+        return loc;
+      }
+    }
+
+    public long spill(long numBytes) throws IOException {
+      synchronized (this) {
+        if (!destructive || dataPages.size() == 1) {
+          return 0L;
+        }
+
+        // TODO: use existing ShuffleWriteMetrics
+        ShuffleWriteMetrics writeMetrics = new ShuffleWriteMetrics();
+
+        long released = 0L;
+        while (dataPages.size() > 0) {
+          MemoryBlock block = dataPages.getLast();
+          // The currentPage is used, cannot be released
+          if (block == currentPage) {
+            break;
+          }
+
+          Object base = block.getBaseObject();
+          long offset = block.getBaseOffset();
+          int numRecords = Platform.getInt(base, offset);
+          offset += 4;
+          final UnsafeSorterSpillWriter writer =
+            new UnsafeSorterSpillWriter(blockManager, 32 * 1024, writeMetrics, numRecords);
+          while (numRecords > 0) {
+            int length = Platform.getInt(base, offset);
+            writer.write(base, offset + 4, length, 0);
+            offset += 4 + length;
+            numRecords--;
+          }
+          writer.close();
+          spillWriters.add(writer);
+
+          dataPages.removeLast();
+          released += block.size();
+          freePage(block);
+
+          if (released >= numBytes) {
+            break;
+          }
+        }
+
+        return released;
+      }
     }
 
     @Override
@@ -290,8 +392,8 @@ public void remove() {
    * If any other lookups or operations are performed on this map while iterating over it, including
    * `lookup()`, the behavior of the returned iterator is undefined.
    */
-  public BytesToBytesMapIterator iterator() {
-    return new BytesToBytesMapIterator(numElements, dataPages.iterator(), loc, false, this);
+  public MapIterator iterator() {
+    return new MapIterator(numElements, loc, false);
   }
 
   /**
@@ -304,8 +406,8 @@ public BytesToBytesMapIterator iterator() {
    * If any other lookups or operations are performed on this map while iterating over it, including
    * `lookup()`, the behavior of the returned iterator is undefined.
    */
-  public BytesToBytesMapIterator destructiveIterator() {
-    return new BytesToBytesMapIterator(numElements, dataPages.iterator(), loc, true, this);
+  public MapIterator destructiveIterator() {
+    return new MapIterator(numElements, loc, true);
   }
 
   /**
@@ -314,11 +416,8 @@ public BytesToBytesMapIterator destructiveIterator() {
    *
    * This function always return the same {@link Location} instance to avoid object allocation.
    */
-  public Location lookup(
-      Object keyBaseObject,
-      long keyBaseOffset,
-      int keyRowLengthBytes) {
-    safeLookup(keyBaseObject, keyBaseOffset, keyRowLengthBytes, loc);
+  public Location lookup(Object keyBase, long keyOffset, int keyLength) {
+    safeLookup(keyBase, keyOffset, keyLength, loc);
     return loc;
   }
 
@@ -327,18 +426,14 @@ public Location lookup(
    *
    * This is a thread-safe version of `lookup`, could be used by multiple threads.
    */
-  public void safeLookup(
-      Object keyBaseObject,
-      long keyBaseOffset,
-      int keyRowLengthBytes,
-      Location loc) {
+  public void safeLookup(Object keyBase, long keyOffset, int keyLength, Location loc) {
     assert(bitset != null);
     assert(longArray != null);
 
     if (enablePerfMetrics) {
       numKeyLookups++;
     }
-    final int hashcode = HASHER.hashUnsafeWords(keyBaseObject, keyBaseOffset, keyRowLengthBytes);
+    final int hashcode = HASHER.hashUnsafeWords(keyBase, keyOffset, keyLength);
     int pos = hashcode & mask;
     int step = 1;
     while (true) {
@@ -354,16 +449,16 @@ public void safeLookup(
         if ((int) (stored) == hashcode) {
           // Full hash code matches.  Let's compare the keys for equality.
           loc.with(pos, hashcode, true);
-          if (loc.getKeyLength() == keyRowLengthBytes) {
+          if (loc.getKeyLength() == keyLength) {
             final MemoryLocation keyAddress = loc.getKeyAddress();
-            final Object storedKeyBaseObject = keyAddress.getBaseObject();
-            final long storedKeyBaseOffset = keyAddress.getBaseOffset();
+            final Object storedkeyBase = keyAddress.getBaseObject();
+            final long storedkeyOffset = keyAddress.getBaseOffset();
             final boolean areEqual = ByteArrayMethods.arrayEquals(
-              keyBaseObject,
-              keyBaseOffset,
-              storedKeyBaseObject,
-              storedKeyBaseOffset,
-              keyRowLengthBytes
+              keyBase,
+              keyOffset,
+              storedkeyBase,
+              storedkeyOffset,
+              keyLength
             );
             if (areEqual) {
               return;
@@ -410,18 +505,18 @@ private void updateAddressesAndSizes(long fullKeyAddress) {
         taskMemoryManager.getOffsetInPage(fullKeyAddress));
     }
 
-    private void updateAddressesAndSizes(final Object page, final long offsetInPage) {
-      long position = offsetInPage;
-      final int totalLength = Platform.getInt(page, position);
+    private void updateAddressesAndSizes(final Object base, final long offset) {
+      long position = offset;
+      final int totalLength = Platform.getInt(base, position);
       position += 4;
-      keyLength = Platform.getInt(page, position);
+      keyLength = Platform.getInt(base, position);
       position += 4;
       valueLength = totalLength - keyLength - 4;
 
-      keyMemoryLocation.setObjAndOffset(page, position);
+      keyMemoryLocation.setObjAndOffset(base, position);
 
       position += keyLength;
-      valueMemoryLocation.setObjAndOffset(page, position);
+      valueMemoryLocation.setObjAndOffset(base, position);
     }
 
     private Location with(int pos, int keyHashcode, boolean isDefined) {
@@ -443,6 +538,19 @@ private Location with(MemoryBlock page, long offsetInPage) {
       return this;
     }
 
+    /**
+     * This is only used for spilling
+     */
+    private Location with(Object base, long offset, int length) {
+      this.isDefined = true;
+      this.memoryPage = null;
+      keyLength = Platform.getInt(base, offset);
+      valueLength = length - 4 - keyLength;
+      keyMemoryLocation.setObjAndOffset(base, offset + 4);
+      valueMemoryLocation.setObjAndOffset(base, offset + 4 + keyLength);
+      return this;
+    }
+
     /**
      * Returns the memory page that contains the current record.
      * This is only valid if this is returned by {@link BytesToBytesMap#iterator()}.
@@ -517,9 +625,9 @@ public int getValueLength() {
      * As an example usage, here's the proper way to store a new key:
      * </p>
      * <pre>
-     *   Location loc = map.lookup(keyBaseObject, keyBaseOffset, keyLengthInBytes);
+     *   Location loc = map.lookup(keyBase, keyOffset, keyLength);
      *   if (!loc.isDefined()) {
-     *     if (!loc.putNewKey(keyBaseObject, keyBaseOffset, keyLengthInBytes, ...)) {
+     *     if (!loc.putNewKey(keyBase, keyOffset, keyLength, ...)) {
      *       // handle failure to grow map (by spilling, for example)
      *     }
      *   }
@@ -531,113 +639,59 @@ public int getValueLength() {
      * @return true if the put() was successful and false if the put() failed because memory could
      *         not be acquired.
      */
-    public boolean putNewKey(
-        Object keyBaseObject,
-        long keyBaseOffset,
-        int keyLengthBytes,
-        Object valueBaseObject,
-        long valueBaseOffset,
-        int valueLengthBytes) {
+    public boolean putNewKey(Object keyBase, long keyOffset, int keyLength,
+        Object valueBase, long valueOffset, int valueLength) {
       assert (!isDefined) : "Can only set value once for a key";
-      assert (keyLengthBytes % 8 == 0);
-      assert (valueLengthBytes % 8 == 0);
+      assert (keyLength % 8 == 0);
+      assert (valueLength % 8 == 0);
       assert(bitset != null);
       assert(longArray != null);
 
-      if (numElements == MAX_CAPACITY) {
-        throw new IllegalStateException("BytesToBytesMap has reached maximum capacity");
+      if (numElements == MAX_CAPACITY || !canGrowArray) {
+        return false;
       }
 
       // Here, we'll copy the data into our data pages. Because we only store a relative offset from
       // the key address instead of storing the absolute address of the value, the key and value
       // must be stored in the same memory page.
       // (8 byte key length) (key) (value)
-      final long requiredSize = 8 + keyLengthBytes + valueLengthBytes;
-
-      // --- Figure out where to insert the new record ---------------------------------------------
-
-      final MemoryBlock dataPage;
-      final Object dataPageBaseObject;
-      final long dataPageInsertOffset;
-      boolean useOverflowPage = requiredSize > pageSizeBytes - 8;
-      if (useOverflowPage) {
-        // The record is larger than the page size, so allocate a special overflow page just to hold
-        // that record.
-        final long overflowPageSize = requiredSize + 8;
-        MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-        if (overflowPage == null) {
-          logger.debug("Failed to acquire {} bytes of memory", overflowPageSize);
+      final long recordLength = 8 + keyLength + valueLength;
+      if (currentPage == null || currentPage.size() - pageCursor < recordLength) {
+        if (!acquireNewPage(recordLength + 4L)) {
           return false;
         }
-        dataPages.add(overflowPage);
-        dataPage = overflowPage;
-        dataPageBaseObject = overflowPage.getBaseObject();
-        dataPageInsertOffset = overflowPage.getBaseOffset();
-      } else if (currentDataPage == null || pageSizeBytes - 8 - pageCursor < requiredSize) {
-        // The record can fit in a data page, but either we have not allocated any pages yet or
-        // the current page does not have enough space.
-        if (currentDataPage != null) {
-          // There wasn't enough space in the current page, so write an end-of-page marker:
-          final Object pageBaseObject = currentDataPage.getBaseObject();
-          final long lengthOffsetInPage = currentDataPage.getBaseOffset() + pageCursor;
-          Platform.putInt(pageBaseObject, lengthOffsetInPage, END_OF_PAGE_MARKER);
-        }
-        if (!acquireNewPage()) {
-          return false;
-        }
-        dataPage = currentDataPage;
-        dataPageBaseObject = currentDataPage.getBaseObject();
-        dataPageInsertOffset = currentDataPage.getBaseOffset();
-      } else {
-        // There is enough space in the current data page.
-        dataPage = currentDataPage;
-        dataPageBaseObject = currentDataPage.getBaseObject();
-        dataPageInsertOffset = currentDataPage.getBaseOffset() + pageCursor;
       }
 
       // --- Append the key and value data to the current data page --------------------------------
-
-      long insertCursor = dataPageInsertOffset;
-
-      // Compute all of our offsets up-front:
-      final long recordOffset = insertCursor;
-      insertCursor += 4;
-      final long keyLengthOffset = insertCursor;
-      insertCursor += 4;
-      final long keyDataOffsetInPage = insertCursor;
-      insertCursor += keyLengthBytes;
-      final long valueDataOffsetInPage = insertCursor;
-      insertCursor += valueLengthBytes; // word used to store the value size
-
-      Platform.putInt(dataPageBaseObject, recordOffset,
-        keyLengthBytes + valueLengthBytes + 4);
-      Platform.putInt(dataPageBaseObject, keyLengthOffset, keyLengthBytes);
-      // Copy the key
-      Platform.copyMemory(
-        keyBaseObject, keyBaseOffset, dataPageBaseObject, keyDataOffsetInPage, keyLengthBytes);
-      // Copy the value
-      Platform.copyMemory(valueBaseObject, valueBaseOffset, dataPageBaseObject,
-        valueDataOffsetInPage, valueLengthBytes);
-
-      // --- Update bookeeping data structures -----------------------------------------------------
-
-      if (useOverflowPage) {
-        // Store the end-of-page marker at the end of the data page
-        Platform.putInt(dataPageBaseObject, insertCursor, END_OF_PAGE_MARKER);
-      } else {
-        pageCursor += requiredSize;
-      }
-
+      final Object base = currentPage.getBaseObject();
+      long offset = currentPage.getBaseOffset() + pageCursor;
+      final long recordOffset = offset;
+      Platform.putInt(base, offset, keyLength + valueLength + 4);
+      Platform.putInt(base, offset + 4, keyLength);
+      offset += 8;
+      Platform.copyMemory(keyBase, keyOffset, base, offset, keyLength);
+      offset += keyLength;
+      Platform.copyMemory(valueBase, valueOffset, base, offset, valueLength);
+
+      // --- Update bookkeeping data structures -----------------------------------------------------
+      offset = currentPage.getBaseOffset();
+      Platform.putInt(base, offset, Platform.getInt(base, offset) + 1);
+      pageCursor += recordLength;
       numElements++;
       bitset.set(pos);
       final long storedKeyAddress = taskMemoryManager.encodePageNumberAndOffset(
-        dataPage, recordOffset);
+        currentPage, recordOffset);
       longArray.set(pos * 2, storedKeyAddress);
       longArray.set(pos * 2 + 1, keyHashcode);
       updateAddressesAndSizes(storedKeyAddress);
       isDefined = true;
+
       if (numElements > growthThreshold && longArray.size() < MAX_CAPACITY) {
-        growAndRehash();
+        try {
+          growAndRehash();
+        } catch (OutOfMemoryError oom) {
+          canGrowArray = false;
+        }
       }
       return true;
     }
@@ -647,18 +701,26 @@ public boolean putNewKey(
    * Acquire a new page from the memory manager.
    * @return whether there is enough space to allocate the new page.
    */
-  private boolean acquireNewPage() {
-    MemoryBlock newPage = taskMemoryManager.allocatePage(pageSizeBytes);
-    if (newPage == null) {
-      logger.debug("Failed to acquire {} bytes of memory", pageSizeBytes);
+  private boolean acquireNewPage(long required) {
+    try {
+      currentPage = allocatePage(required);
+    } catch (OutOfMemoryError e) {
       return false;
     }
-    dataPages.add(newPage);
-    pageCursor = 0;
-    currentDataPage = newPage;
+    dataPages.add(currentPage);
+    Platform.putInt(currentPage.getBaseObject(), currentPage.getBaseOffset(), 0);
+    pageCursor = 4;
     return true;
   }
 
+  @Override
+  public long spill(long size, MemoryConsumer trigger) throws IOException {
+    if (trigger != this && destructiveIterator != null) {
+      return destructiveIterator.spill(size);
+    }
+    return 0L;
+  }
+
   /**
    * Allocate new data structures for this map. When calling this outside of the constructor,
    * make sure to keep references to the old data structures so that you can free them.
@@ -670,6 +732,7 @@ private void allocate(int capacity) {
     // The capacity needs to be divisible by 64 so that our bit set can be sized properly
     capacity = Math.max((int) Math.min(MAX_CAPACITY, ByteArrayMethods.nextPowerOf2(capacity)), 64);
     assert (capacity <= MAX_CAPACITY);
+    acquireMemory(capacity * 16);
     longArray = new LongArray(MemoryBlock.fromLongArray(new long[capacity * 2]));
     bitset = new BitSet(MemoryBlock.fromLongArray(new long[capacity / 64]));
 
@@ -677,6 +740,19 @@ private void allocate(int capacity) {
     this.mask = capacity - 1;
   }
 
+  /**
+   * Free the memory used by longArray.
+   */
+  public void freeArray() {
+    updatePeakMemoryUsed();
+    if (longArray != null) {
+      long used = longArray.memoryBlock().size();
+      longArray = null;
+      releaseMemory(used);
+      bitset = null;
+    }
+  }
+
   /**
    * Free all allocated memory associated with this map, including the storage for keys and values
    * as well as the hash map array itself.
@@ -684,16 +760,23 @@ private void allocate(int capacity) {
    * This method is idempotent and can be called multiple times.
    */
   public void free() {
-    updatePeakMemoryUsed();
-    longArray = null;
-    bitset = null;
+    freeArray();
     Iterator<MemoryBlock> dataPagesIterator = dataPages.iterator();
     while (dataPagesIterator.hasNext()) {
       MemoryBlock dataPage = dataPagesIterator.next();
       dataPagesIterator.remove();
-      taskMemoryManager.freePage(dataPage);
+      freePage(dataPage);
     }
     assert(dataPages.isEmpty());
+
+    while (!spillWriters.isEmpty()) {
+      File file = spillWriters.removeFirst().getFile();
+      if (file != null && file.exists()) {
+        if (!file.delete()) {
+          logger.error("Was unable to delete spill file {}", file.getAbsolutePath());
+        }
+      }
+    }
   }
 
   public TaskMemoryManager getTaskMemoryManager() {
@@ -782,7 +865,13 @@ void growAndRehash() {
     final int oldCapacity = (int) oldBitSet.capacity();
 
     // Allocate the new data structures
-    allocate(Math.min(growthStrategy.nextCapacity(oldCapacity), MAX_CAPACITY));
+    try {
+      allocate(Math.min(growthStrategy.nextCapacity(oldCapacity), MAX_CAPACITY));
+    } catch (OutOfMemoryError oom) {
+      longArray = oldLongArray;
+      bitset = oldBitSet;
+      throw oom;
+    }
 
     // Re-mask (we don't recompute the hashcode because we stored all 32 bits of it)
     for (int pos = oldBitSet.nextSetBit(0); pos >= 0; pos = oldBitSet.nextSetBit(pos + 1)) {
@@ -806,6 +895,7 @@ void growAndRehash() {
         }
       }
     }
+    releaseMemory(oldLongArray.memoryBlock().size());
 
     if (enablePerfMetrics) {
       timeSpentResizingNs += System.nanoTime() - resizeStartTime;
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index e317ea391c55..49a5a4b13b70 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -17,39 +17,34 @@
 
 package org.apache.spark.util.collection.unsafe.sort;
 
+import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
 import java.util.LinkedList;
 
-import javax.annotation.Nullable;
-
-import scala.runtime.AbstractFunction0;
-import scala.runtime.BoxedUnit;
-
 import com.google.common.annotations.VisibleForTesting;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
+import org.apache.spark.memory.MemoryConsumer;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.storage.BlockManager;
-import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.util.TaskCompletionListener;
 import org.apache.spark.util.Utils;
 
 /**
  * External sorter based on {@link UnsafeInMemorySorter}.
  */
-public final class UnsafeExternalSorter {
+public final class UnsafeExternalSorter extends MemoryConsumer {
 
   private final Logger logger = LoggerFactory.getLogger(UnsafeExternalSorter.class);
 
-  private final long pageSizeBytes;
   private final PrefixComparator prefixComparator;
   private final RecordComparator recordComparator;
-  private final int initialSize;
   private final TaskMemoryManager taskMemoryManager;
   private final BlockManager blockManager;
   private final TaskContext taskContext;
@@ -69,14 +64,12 @@ public final class UnsafeExternalSorter {
   private final LinkedList<UnsafeSorterSpillWriter> spillWriters = new LinkedList<>();
 
   // These variables are reset after spilling:
-  @Nullable private UnsafeInMemorySorter inMemSorter;
-  // Whether the in-mem sorter is created internally, or passed in from outside.
-  // If it is passed in from outside, we shouldn't release the in-mem sorter's memory.
-  private boolean isInMemSorterExternal = false;
+  @Nullable private volatile UnsafeInMemorySorter inMemSorter;
+
   private MemoryBlock currentPage = null;
-  private long currentPagePosition = -1;
-  private long freeSpaceInCurrentPage = 0;
+  private long pageCursor = -1;
   private long peakMemoryUsedBytes = 0;
+  private volatile SpillableIterator readingIterator = null;
 
   public static UnsafeExternalSorter createWithExistingInMemorySorter(
       TaskMemoryManager taskMemoryManager,
@@ -86,7 +79,7 @@ public static UnsafeExternalSorter createWithExistingInMemorySorter(
       PrefixComparator prefixComparator,
       int initialSize,
       long pageSizeBytes,
-      UnsafeInMemorySorter inMemorySorter) throws IOException {
+      UnsafeInMemorySorter inMemorySorter) {
     return new UnsafeExternalSorter(taskMemoryManager, blockManager,
       taskContext, recordComparator, prefixComparator, initialSize, pageSizeBytes, inMemorySorter);
   }
@@ -98,7 +91,7 @@ public static UnsafeExternalSorter create(
       RecordComparator recordComparator,
       PrefixComparator prefixComparator,
       int initialSize,
-      long pageSizeBytes) throws IOException {
+      long pageSizeBytes) {
     return new UnsafeExternalSorter(taskMemoryManager, blockManager,
       taskContext, recordComparator, prefixComparator, initialSize, pageSizeBytes, null);
   }
@@ -111,60 +104,41 @@ private UnsafeExternalSorter(
       PrefixComparator prefixComparator,
       int initialSize,
       long pageSizeBytes,
-      @Nullable UnsafeInMemorySorter existingInMemorySorter) throws IOException {
+      @Nullable UnsafeInMemorySorter existingInMemorySorter) {
+    super(taskMemoryManager, pageSizeBytes);
     this.taskMemoryManager = taskMemoryManager;
     this.blockManager = blockManager;
     this.taskContext = taskContext;
     this.recordComparator = recordComparator;
     this.prefixComparator = prefixComparator;
-    this.initialSize = initialSize;
     // Use getSizeAsKb (not bytes) to maintain backwards compatibility for units
     // this.fileBufferSizeBytes = (int) conf.getSizeAsKb("spark.shuffle.file.buffer", "32k") * 1024;
     this.fileBufferSizeBytes = 32 * 1024;
-    this.pageSizeBytes = pageSizeBytes;
+    // TODO: metrics tracking + integration with shuffle write metrics
+    // need to connect the write metrics to task metrics so we count the spill IO somewhere.
     this.writeMetrics = new ShuffleWriteMetrics();
 
     if (existingInMemorySorter == null) {
-      initializeForWriting();
-      // Acquire a new page as soon as we construct the sorter to ensure that we have at
-      // least one page to work with. Otherwise, other operators in the same task may starve
-      // this sorter (SPARK-9709). We don't need to do this if we already have an existing sorter.
-      acquireNewPage();
+      this.inMemSorter =
+        new UnsafeInMemorySorter(taskMemoryManager, recordComparator, prefixComparator, initialSize);
+      acquireMemory(inMemSorter.getMemoryUsage());
     } else {
-      this.isInMemSorterExternal = true;
       this.inMemSorter = existingInMemorySorter;
+      // will acquire after free the map
     }
+    this.peakMemoryUsedBytes = getMemoryUsage();
 
     // Register a cleanup task with TaskContext to ensure that memory is guaranteed to be freed at
     // the end of the task. This is necessary to avoid memory leaks in when the downstream operator
     // does not fully consume the sorter's output (e.g. sort followed by limit).
-    taskContext.addOnCompleteCallback(new AbstractFunction0<BoxedUnit>() {
-      @Override
-      public BoxedUnit apply() {
-        cleanupResources();
-        return null;
+    taskContext.addTaskCompletionListener(
+      new TaskCompletionListener() {
+        @Override
+        public void onTaskCompletion(TaskContext context) {
+          cleanupResources();
+        }
       }
-    });
-  }
-
-  // TODO: metrics tracking + integration with shuffle write metrics
-  // need to connect the write metrics to task metrics so we count the spill IO somewhere.
-
-  /**
-   * Allocates new sort data structures. Called when creating the sorter and after each spill.
-   */
-  private void initializeForWriting() throws IOException {
-    // Note: Do not track memory for the pointer array for now because of SPARK-10474.
-    // In more detail, in TungstenAggregate we only reserve a page, but when we fall back to
-    // sort-based aggregation we try to acquire a page AND a pointer array, which inevitably
-    // fails if all other memory is already occupied. It should be safe to not track the array
-    // because its memory footprint is frequently much smaller than that of a page. This is a
-    // temporary hack that we should address in 1.6.0.
-    // TODO: track the pointer array memory!
-    this.writeMetrics = new ShuffleWriteMetrics();
-    this.inMemSorter =
-      new UnsafeInMemorySorter(taskMemoryManager, recordComparator, prefixComparator, initialSize);
-    this.isInMemSorterExternal = false;
+    );
   }
 
   /**
@@ -173,14 +147,27 @@ private void initializeForWriting() throws IOException {
    */
   @VisibleForTesting
   public void closeCurrentPage() {
-    freeSpaceInCurrentPage = 0;
+    if (currentPage != null) {
+      pageCursor = currentPage.getBaseOffset() + currentPage.size();
+    }
   }
 
   /**
    * Sort and spill the current records in response to memory pressure.
    */
-  public void spill() throws IOException {
-    assert(inMemSorter != null);
+  @Override
+  public long spill(long size, MemoryConsumer trigger) throws IOException {
+    if (trigger != this) {
+      if (readingIterator != null) {
+        return readingIterator.spill();
+      }
+      return 0L;
+    }
+
+    if (inMemSorter == null || inMemSorter.numRecords() <= 0) {
+      return 0L;
+    }
+
     logger.info("Thread {} spilling sort data of {} to disk ({} {} so far)",
       Thread.currentThread().getId(),
       Utils.bytesToString(getMemoryUsage()),
@@ -202,6 +189,8 @@ public void spill() throws IOException {
         spillWriter.write(baseObject, baseOffset, recordLength, sortedRecords.getKeyPrefix());
       }
       spillWriter.close();
+
+      inMemSorter.reset();
     }
 
     final long spillSize = freeMemory();
@@ -210,7 +199,7 @@ public void spill() throws IOException {
     // written to disk. This also counts the space needed to store the sorter's pointer array.
     taskContext.taskMetrics().incMemoryBytesSpilled(spillSize);
 
-    initializeForWriting();
+    return spillSize;
   }
 
   /**
@@ -246,7 +235,7 @@ public int getNumberOfAllocatedPages() {
   }
 
   /**
-   * Free this sorter's in-memory data structures, including its data pages and pointer array.
+   * Free this sorter's data pages.
    *
    * @return the number of bytes freed.
    */
@@ -254,14 +243,12 @@ private long freeMemory() {
     updatePeakMemoryUsed();
     long memoryFreed = 0;
     for (MemoryBlock block : allocatedPages) {
-      taskMemoryManager.freePage(block);
       memoryFreed += block.size();
+      freePage(block);
     }
-    // TODO: track in-memory sorter memory usage (SPARK-10474)
     allocatedPages.clear();
     currentPage = null;
-    currentPagePosition = -1;
-    freeSpaceInCurrentPage = 0;
+    pageCursor = 0;
     return memoryFreed;
   }
 
@@ -283,8 +270,15 @@ private void deleteSpillFiles() {
    * Frees this sorter's in-memory data structures and cleans up its spill files.
    */
   public void cleanupResources() {
-    deleteSpillFiles();
-    freeMemory();
+    synchronized (this) {
+      deleteSpillFiles();
+      freeMemory();
+      if (inMemSorter != null) {
+        long used = inMemSorter.getMemoryUsage();
+        inMemSorter = null;
+        releaseMemory(used);
+      }
+    }
   }
 
   /**
@@ -295,8 +289,28 @@ public void cleanupResources() {
   private void growPointerArrayIfNecessary() throws IOException {
     assert(inMemSorter != null);
     if (!inMemSorter.hasSpaceForAnotherRecord()) {
-      // TODO: track the pointer array memory! (SPARK-10474)
-      inMemSorter.expandPointerArray();
+      long used = inMemSorter.getMemoryUsage();
+      long needed = used + inMemSorter.getMemoryToExpand();
+      try {
+        acquireMemory(needed);  // could trigger spilling
+      } catch (OutOfMemoryError e) {
+        // should have trigger spilling
+        assert(inMemSorter.hasSpaceForAnotherRecord());
+        return;
+      }
+      // check if spilling is triggered or not
+      if (inMemSorter.hasSpaceForAnotherRecord()) {
+        releaseMemory(needed);
+      } else {
+        try {
+          inMemSorter.expandPointerArray();
+          releaseMemory(used);
+        } catch (OutOfMemoryError oom) {
+          // Just in case that JVM had run out of memory
+          releaseMemory(needed);
+          spill();
+        }
+      }
     }
   }
 
@@ -304,101 +318,38 @@ private void growPointerArrayIfNecessary() throws IOException {
    * Allocates more memory in order to insert an additional record. This will request additional
    * memory from the memory manager and spill if the requested memory can not be obtained.
    *
-   * @param requiredSpace the required space in the data page, in bytes, including space for storing
+   * @param required the required space in the data page, in bytes, including space for storing
    *                      the record size. This must be less than or equal to the page size (records
    *                      that exceed the page size are handled via a different code path which uses
    *                      special overflow pages).
    */
-  private void acquireNewPageIfNecessary(int requiredSpace) throws IOException {
-    assert (requiredSpace <= pageSizeBytes);
-    if (requiredSpace > freeSpaceInCurrentPage) {
-      logger.trace("Required space {} is less than free space in current page ({})", requiredSpace,
-        freeSpaceInCurrentPage);
-      // TODO: we should track metrics on the amount of space wasted when we roll over to a new page
-      // without using the free space at the end of the current page. We should also do this for
-      // BytesToBytesMap.
-      if (requiredSpace > pageSizeBytes) {
-        throw new IOException("Required space " + requiredSpace + " is greater than page size (" +
-          pageSizeBytes + ")");
-      } else {
-        acquireNewPage();
-      }
+  private void acquireNewPageIfNecessary(int required) {
+    if (currentPage == null ||
+      pageCursor + required > currentPage.getBaseOffset() + currentPage.size()) {
+      // TODO: try to find space on previous pages
+      currentPage = allocatePage(required);
+      pageCursor = currentPage.getBaseOffset();
+      allocatedPages.add(currentPage);
     }
   }
 
-  /**
-   * Acquire a new page from the memory manager.
-   *
-   * If there is not enough space to allocate the new page, spill all existing ones
-   * and try again. If there is still not enough space, report error to the caller.
-   */
-  private void acquireNewPage() throws IOException {
-    currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
-    if (currentPage == null) {
-      spill();
-      currentPage = taskMemoryManager.allocatePage(pageSizeBytes);
-      if (currentPage == null) {
-        throw new IOException("Unable to acquire " + pageSizeBytes + " bytes of memory");
-      }
-    }
-    currentPagePosition = currentPage.getBaseOffset();
-    freeSpaceInCurrentPage = pageSizeBytes;
-    allocatedPages.add(currentPage);
-  }
-
   /**
    * Write a record to the sorter.
    */
-  public void insertRecord(
-      Object recordBaseObject,
-      long recordBaseOffset,
-      int lengthInBytes,
-      long prefix) throws IOException {
+  public void insertRecord(Object recordBase, long recordOffset, int length, long prefix)
+    throws IOException {
 
     growPointerArrayIfNecessary();
     // Need 4 bytes to store the record length.
-    final int totalSpaceRequired = lengthInBytes + 4;
-
-    // --- Figure out where to insert the new record ----------------------------------------------
-
-    final MemoryBlock dataPage;
-    long dataPagePosition;
-    boolean useOverflowPage = totalSpaceRequired > pageSizeBytes;
-    if (useOverflowPage) {
-      long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
-      // The record is larger than the page size, so allocate a special overflow page just to hold
-      // that record.
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-      if (overflowPage == null) {
-        spill();
-        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-        if (overflowPage == null) {
-          throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
-        }
-      }
-      allocatedPages.add(overflowPage);
-      dataPage = overflowPage;
-      dataPagePosition = overflowPage.getBaseOffset();
-    } else {
-      // The record is small enough to fit in a regular data page, but the current page might not
-      // have enough space to hold it (or no pages have been allocated yet).
-      acquireNewPageIfNecessary(totalSpaceRequired);
-      dataPage = currentPage;
-      dataPagePosition = currentPagePosition;
-      // Update bookkeeping information
-      freeSpaceInCurrentPage -= totalSpaceRequired;
-      currentPagePosition += totalSpaceRequired;
-    }
-    final Object dataPageBaseObject = dataPage.getBaseObject();
-
-    // --- Insert the record ----------------------------------------------------------------------
-
-    final long recordAddress =
-      taskMemoryManager.encodePageNumberAndOffset(dataPage, dataPagePosition);
-    Platform.putInt(dataPageBaseObject, dataPagePosition, lengthInBytes);
-    dataPagePosition += 4;
-    Platform.copyMemory(
-      recordBaseObject, recordBaseOffset, dataPageBaseObject, dataPagePosition, lengthInBytes);
+    final int required = length + 4;
+    acquireNewPageIfNecessary(required);
+
+    final Object base = currentPage.getBaseObject();
+    final long recordAddress = taskMemoryManager.encodePageNumberAndOffset(currentPage, pageCursor);
+    Platform.putInt(base, pageCursor, length);
+    pageCursor += 4;
+    Platform.copyMemory(recordBase, recordOffset, base, pageCursor, length);
+    pageCursor += length;
     assert(inMemSorter != null);
     inMemSorter.insertRecord(recordAddress, prefix);
   }
@@ -411,59 +362,24 @@ public void insertRecord(
    *
    * record length = key length + value length + 4
    */
-  public void insertKVRecord(
-      Object keyBaseObj, long keyOffset, int keyLen,
-      Object valueBaseObj, long valueOffset, int valueLen, long prefix) throws IOException {
+  public void insertKVRecord(Object keyBase, long keyOffset, int keyLen,
+      Object valueBase, long valueOffset, int valueLen, long prefix)
+    throws IOException {
 
     growPointerArrayIfNecessary();
-    final int totalSpaceRequired = keyLen + valueLen + 4 + 4;
-
-    // --- Figure out where to insert the new record ----------------------------------------------
-
-    final MemoryBlock dataPage;
-    long dataPagePosition;
-    boolean useOverflowPage = totalSpaceRequired > pageSizeBytes;
-    if (useOverflowPage) {
-      long overflowPageSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(totalSpaceRequired);
-      // The record is larger than the page size, so allocate a special overflow page just to hold
-      // that record.
-      MemoryBlock overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-      if (overflowPage == null) {
-        spill();
-        overflowPage = taskMemoryManager.allocatePage(overflowPageSize);
-        if (overflowPage == null) {
-          throw new IOException("Unable to acquire " + overflowPageSize + " bytes of memory");
-        }
-      }
-      allocatedPages.add(overflowPage);
-      dataPage = overflowPage;
-      dataPagePosition = overflowPage.getBaseOffset();
-    } else {
-      // The record is small enough to fit in a regular data page, but the current page might not
-      // have enough space to hold it (or no pages have been allocated yet).
-      acquireNewPageIfNecessary(totalSpaceRequired);
-      dataPage = currentPage;
-      dataPagePosition = currentPagePosition;
-      // Update bookkeeping information
-      freeSpaceInCurrentPage -= totalSpaceRequired;
-      currentPagePosition += totalSpaceRequired;
-    }
-    final Object dataPageBaseObject = dataPage.getBaseObject();
-
-    // --- Insert the record ----------------------------------------------------------------------
-
-    final long recordAddress =
-      taskMemoryManager.encodePageNumberAndOffset(dataPage, dataPagePosition);
-    Platform.putInt(dataPageBaseObject, dataPagePosition, keyLen + valueLen + 4);
-    dataPagePosition += 4;
-
-    Platform.putInt(dataPageBaseObject, dataPagePosition, keyLen);
-    dataPagePosition += 4;
-
-    Platform.copyMemory(keyBaseObj, keyOffset, dataPageBaseObject, dataPagePosition, keyLen);
-    dataPagePosition += keyLen;
-
-    Platform.copyMemory(valueBaseObj, valueOffset, dataPageBaseObject, dataPagePosition, valueLen);
+    final int required = keyLen + valueLen + 4 + 4;
+    acquireNewPageIfNecessary(required);
+
+    final Object base = currentPage.getBaseObject();
+    final long recordAddress = taskMemoryManager.encodePageNumberAndOffset(currentPage, pageCursor);
+    Platform.putInt(base, pageCursor, keyLen + valueLen + 4);
+    pageCursor += 4;
+    Platform.putInt(base, pageCursor, keyLen);
+    pageCursor += 4;
+    Platform.copyMemory(keyBase, keyOffset, base, pageCursor, keyLen);
+    pageCursor += keyLen;
+    Platform.copyMemory(valueBase, valueOffset, base, pageCursor, valueLen);
+    pageCursor += valueLen;
 
     assert(inMemSorter != null);
     inMemSorter.insertRecord(recordAddress, prefix);
@@ -475,10 +391,10 @@ public void insertKVRecord(
    */
   public UnsafeSorterIterator getSortedIterator() throws IOException {
     assert(inMemSorter != null);
-    final UnsafeInMemorySorter.SortedIterator inMemoryIterator = inMemSorter.getSortedIterator();
-    int numIteratorsToMerge = spillWriters.size() + (inMemoryIterator.hasNext() ? 1 : 0);
+    readingIterator = new SpillableIterator(inMemSorter.getSortedIterator());
+    int numIteratorsToMerge = spillWriters.size() + (readingIterator.hasNext() ? 1 : 0);
     if (spillWriters.isEmpty()) {
-      return inMemoryIterator;
+      return readingIterator;
     } else {
       final UnsafeSorterSpillMerger spillMerger =
         new UnsafeSorterSpillMerger(recordComparator, prefixComparator, numIteratorsToMerge);
@@ -486,9 +402,113 @@ public UnsafeSorterIterator getSortedIterator() throws IOException {
         spillMerger.addSpillIfNotEmpty(spillWriter.getReader(blockManager));
       }
       spillWriters.clear();
-      spillMerger.addSpillIfNotEmpty(inMemoryIterator);
+      spillMerger.addSpillIfNotEmpty(readingIterator);
 
       return spillMerger.getSortedIterator();
     }
   }
+
+  /**
+   * An UnsafeSorterIterator that support spilling.
+   */
+  class SpillableIterator extends UnsafeSorterIterator {
+    private UnsafeSorterIterator upstream;
+    private UnsafeSorterIterator nextUpstream = null;
+    private MemoryBlock lastPage = null;
+    private boolean loaded = false;
+    private int numRecords = 0;
+
+    public SpillableIterator(UnsafeInMemorySorter.SortedIterator inMemIterator) {
+      this.upstream = inMemIterator;
+      this.numRecords = inMemIterator.numRecordsLeft();
+    }
+
+    public long spill() throws IOException {
+      synchronized (this) {
+        if (!(upstream instanceof UnsafeInMemorySorter.SortedIterator && nextUpstream == null
+          && numRecords > 0)) {
+          return 0L;
+        }
+
+        UnsafeInMemorySorter.SortedIterator inMemIterator =
+          ((UnsafeInMemorySorter.SortedIterator) upstream).clone();
+
+        final UnsafeSorterSpillWriter spillWriter =
+          new UnsafeSorterSpillWriter(blockManager, fileBufferSizeBytes, writeMetrics, numRecords);
+        while (inMemIterator.hasNext()) {
+          inMemIterator.loadNext();
+          final Object baseObject = inMemIterator.getBaseObject();
+          final long baseOffset = inMemIterator.getBaseOffset();
+          final int recordLength = inMemIterator.getRecordLength();
+          spillWriter.write(baseObject, baseOffset, recordLength, inMemIterator.getKeyPrefix());
+        }
+        spillWriter.close();
+        spillWriters.add(spillWriter);
+        nextUpstream = spillWriter.getReader(blockManager);
+
+        long released = 0L;
+        synchronized (UnsafeExternalSorter.this) {
+          // release the pages except the one that is used
+          for (MemoryBlock page : allocatedPages) {
+            if (!loaded || page.getBaseObject() != inMemIterator.getBaseObject()) {
+              released += page.size();
+              freePage(page);
+            } else {
+              lastPage = page;
+            }
+          }
+          allocatedPages.clear();
+        }
+        return released;
+      }
+    }
+
+    @Override
+    public boolean hasNext() {
+      return numRecords > 0;
+    }
+
+    @Override
+    public void loadNext() throws IOException {
+      synchronized (this) {
+        loaded = true;
+        if (nextUpstream != null) {
+          // Just consumed the last record from in memory iterator
+          if (lastPage != null) {
+            freePage(lastPage);
+            lastPage = null;
+          }
+          upstream = nextUpstream;
+          nextUpstream = null;
+
+          assert(inMemSorter != null);
+          long used = inMemSorter.getMemoryUsage();
+          inMemSorter = null;
+          releaseMemory(used);
+        }
+        numRecords--;
+        upstream.loadNext();
+      }
+    }
+
+    @Override
+    public Object getBaseObject() {
+      return upstream.getBaseObject();
+    }
+
+    @Override
+    public long getBaseOffset() {
+      return upstream.getBaseOffset();
+    }
+
+    @Override
+    public int getRecordLength() {
+      return upstream.getRecordLength();
+    }
+
+    @Override
+    public long getKeyPrefix() {
+      return upstream.getKeyPrefix();
+    }
+  }
 }
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
index 5aad72c374c3..1480f0681ed9 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
@@ -70,12 +70,12 @@ public int compare(RecordPointerAndKeyPrefix r1, RecordPointerAndKeyPrefix r2) {
    * Within this buffer, position {@code 2 * i} holds a pointer pointer to the record at
    * index {@code i}, while position {@code 2 * i + 1} in the array holds an 8-byte key prefix.
    */
-  private long[] pointerArray;
+  private long[] array;
 
   /**
    * The position in the sort buffer where new records can be inserted.
    */
-  private int pointerArrayInsertPosition = 0;
+  private int pos = 0;
 
   public UnsafeInMemorySorter(
       final TaskMemoryManager memoryManager,
@@ -83,37 +83,43 @@ public UnsafeInMemorySorter(
       final PrefixComparator prefixComparator,
       int initialSize) {
     assert (initialSize > 0);
-    this.pointerArray = new long[initialSize * 2];
+    this.array = new long[initialSize * 2];
     this.memoryManager = memoryManager;
     this.sorter = new Sorter<>(UnsafeSortDataFormat.INSTANCE);
     this.sortComparator = new SortComparator(recordComparator, prefixComparator, memoryManager);
   }
 
+  public void reset() {
+    pos = 0;
+  }
+
   /**
    * @return the number of records that have been inserted into this sorter.
    */
   public int numRecords() {
-    return pointerArrayInsertPosition / 2;
+    return pos / 2;
   }
 
-  public long getMemoryUsage() {
-    return pointerArray.length * 8L;
+  private int newLength() {
+    return array.length < Integer.MAX_VALUE / 2 ? (array.length * 2) : Integer.MAX_VALUE;
+  }
+
+  public long getMemoryToExpand() {
+    return (long) (newLength() - array.length) * 8L;
   }
 
-  static long getMemoryRequirementsForPointerArray(long numEntries) {
-    return numEntries * 2L * 8L;
+  public long getMemoryUsage() {
+    return array.length * 8L;
   }
 
   public boolean hasSpaceForAnotherRecord() {
-    return pointerArrayInsertPosition + 2 < pointerArray.length;
+    return pos + 2 <= array.length;
   }
 
   public void expandPointerArray() {
-    final long[] oldArray = pointerArray;
-    // Guard against overflow:
-    final int newLength = oldArray.length * 2 > 0 ? (oldArray.length * 2) : Integer.MAX_VALUE;
-    pointerArray = new long[newLength];
-    System.arraycopy(oldArray, 0, pointerArray, 0, oldArray.length);
+    final long[] oldArray = array;
+    array = new long[newLength()];
+    System.arraycopy(oldArray, 0, array, 0, oldArray.length);
   }
 
   /**
@@ -127,10 +133,10 @@ public void insertRecord(long recordPointer, long keyPrefix) {
     if (!hasSpaceForAnotherRecord()) {
       expandPointerArray();
     }
-    pointerArray[pointerArrayInsertPosition] = recordPointer;
-    pointerArrayInsertPosition++;
-    pointerArray[pointerArrayInsertPosition] = keyPrefix;
-    pointerArrayInsertPosition++;
+    array[pos] = recordPointer;
+    pos++;
+    array[pos] = keyPrefix;
+    pos++;
   }
 
   public static final class SortedIterator extends UnsafeSorterIterator {
@@ -153,11 +159,25 @@ private SortedIterator(
       this.sortBuffer = sortBuffer;
     }
 
+    public SortedIterator clone () {
+      SortedIterator iter = new SortedIterator(memoryManager, sortBufferInsertPosition, sortBuffer);
+      iter.position = position;
+      iter.baseObject = baseObject;
+      iter.baseOffset = baseOffset;
+      iter.keyPrefix = keyPrefix;
+      iter.recordLength = recordLength;
+      return iter;
+    }
+
     @Override
     public boolean hasNext() {
       return position < sortBufferInsertPosition;
     }
 
+    public int numRecordsLeft() {
+      return (sortBufferInsertPosition - position) / 2;
+    }
+
     @Override
     public void loadNext() {
       // This pointer points to a 4-byte record length, followed by the record's bytes
@@ -187,7 +207,7 @@ public void loadNext() {
    * {@code next()} will return the same mutable object.
    */
   public SortedIterator getSortedIterator() {
-    sorter.sort(pointerArray, 0, pointerArrayInsertPosition / 2, sortComparator);
-    return new SortedIterator(memoryManager, pointerArrayInsertPosition, pointerArray);
+    sorter.sort(array, 0, pos / 2, sortComparator);
+    return new SortedIterator(memoryManager, pos, array);
   }
 }
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
index 501dfe77d13c..039e940a357e 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
@@ -20,18 +20,18 @@
 import java.io.*;
 
 import com.google.common.io.ByteStreams;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import org.apache.spark.storage.BlockId;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.unsafe.Platform;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * Reads spill files written by {@link UnsafeSorterSpillWriter} (see that class for a description
  * of the file format).
  */
-final class UnsafeSorterSpillReader extends UnsafeSorterIterator {
+public final class UnsafeSorterSpillReader extends UnsafeSorterIterator {
   private static final Logger logger = LoggerFactory.getLogger(UnsafeSorterSpillReader.class);
 
   private final File file;
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
index e59a84ff8d11..234e21140a1d 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
@@ -35,7 +35,7 @@
  *
  *   [# of records (int)] [[len (int)][prefix (long)][data (bytes)]...]
  */
-final class UnsafeSorterSpillWriter {
+public final class UnsafeSorterSpillWriter {
 
   static final int DISK_WRITE_BUFFER_SIZE = 1024 * 1024;
 
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
index 6c9a71c3855b..b0cf2696a397 100644
--- a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
@@ -24,6 +24,7 @@ import scala.collection.mutable.ArrayBuffer
 
 import com.google.common.annotations.VisibleForTesting
 
+import org.apache.spark.util.Utils
 import org.apache.spark.{SparkException, TaskContext, SparkConf, Logging}
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
 import org.apache.spark.unsafe.array.ByteArrayMethods
@@ -215,8 +216,12 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
   final def releaseExecutionMemory(numBytes: Long, taskAttemptId: Long): Unit = synchronized {
     val curMem = executionMemoryForTask.getOrElse(taskAttemptId, 0L)
     if (curMem < numBytes) {
-      throw new SparkException(
-        s"Internal error: release called on $numBytes bytes but task only has $curMem")
+      if (Utils.isTesting) {
+        throw new SparkException(
+          s"Internal error: release called on $numBytes bytes but task only has $curMem")
+      } else {
+        logWarning(s"Internal error: release called on $numBytes bytes but task only has $curMem")
+      }
     }
     if (executionMemoryForTask.contains(taskAttemptId)) {
       executionMemoryForTask(taskAttemptId) -= numBytes
diff --git a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
index a76891acf0ba..9e002621a690 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
@@ -78,7 +78,7 @@ private[spark] trait Spillable[C] extends Logging {
     if (elementsRead % 32 == 0 && currentMemory >= myMemoryThreshold) {
       // Claim up to double our current memory from the shuffle memory pool
       val amountToRequest = 2 * currentMemory - myMemoryThreshold
-      val granted = taskMemoryManager.acquireExecutionMemory(amountToRequest)
+      val granted = taskMemoryManager.acquireExecutionMemory(amountToRequest, null)
       myMemoryThreshold += granted
       // If we were granted too little memory to grow further (either tryToAcquire returned 0,
       // or we already had more memory than myMemoryThreshold), spill the current collection
@@ -107,7 +107,7 @@ private[spark] trait Spillable[C] extends Logging {
    */
   def releaseMemory(): Unit = {
     // The amount we requested does not include the initial memory tracking threshold
-    taskMemoryManager.releaseExecutionMemory(myMemoryThreshold - initialMemoryThreshold)
+    taskMemoryManager.releaseExecutionMemory(myMemoryThreshold - initialMemoryThreshold, null)
     myMemoryThreshold = initialMemoryThreshold
   }
 
diff --git a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
index f381db0c6265..dab7b0592cb4 100644
--- a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
+++ b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
@@ -17,6 +17,8 @@
 
 package org.apache.spark.memory;
 
+import java.io.IOException;
+
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -25,19 +27,40 @@
 
 public class TaskMemoryManagerSuite {
 
+  class TestMemoryConsumer extends MemoryConsumer {
+    TestMemoryConsumer(TaskMemoryManager memoryManager) {
+      super(memoryManager);
+    }
+
+    @Override
+    public long spill(long size, MemoryConsumer trigger) throws IOException {
+      long used = getUsed();
+      releaseMemory(used);
+      return used;
+    }
+
+    void use(long size) {
+      acquireMemory(size);
+    }
+
+    void free(long size) {
+      releaseMemory(size);
+    }
+  }
+
   @Test
   public void leakedPageMemoryIsDetected() {
     final TaskMemoryManager manager = new TaskMemoryManager(
-      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
-    manager.allocatePage(4096);  // leak memory
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+    manager.allocatePage(4096, null);  // leak memory
     Assert.assertEquals(4096, manager.cleanUpAllAllocatedMemory());
   }
 
   @Test
   public void encodePageNumberAndOffsetOffHeap() {
     final TaskMemoryManager manager = new TaskMemoryManager(
-      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "true")), 0);
-    final MemoryBlock dataPage = manager.allocatePage(256);
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "true")), 0);
+    final MemoryBlock dataPage = manager.allocatePage(256, null);
     // In off-heap mode, an offset is an absolute address that may require more than 51 bits to
     // encode. This test exercises that corner-case:
     final long offset = ((1L << TaskMemoryManager.OFFSET_BITS) + 10);
@@ -49,11 +72,53 @@ public void encodePageNumberAndOffsetOffHeap() {
   @Test
   public void encodePageNumberAndOffsetOnHeap() {
     final TaskMemoryManager manager = new TaskMemoryManager(
-      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
-    final MemoryBlock dataPage = manager.allocatePage(256);
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+    final MemoryBlock dataPage = manager.allocatePage(256, null);
     final long encodedAddress = manager.encodePageNumberAndOffset(dataPage, 64);
     Assert.assertEquals(dataPage.getBaseObject(), manager.getPage(encodedAddress));
     Assert.assertEquals(64, manager.getOffsetInPage(encodedAddress));
   }
 
+  @Test
+  public void cooperativeSpilling() {
+    final TestMemoryManager memoryManager = new TestMemoryManager(new SparkConf());
+    memoryManager.limit(100);
+    final TaskMemoryManager manager = new TaskMemoryManager(memoryManager, 0);
+
+    TestMemoryConsumer c1 = new TestMemoryConsumer(manager);
+    TestMemoryConsumer c2 = new TestMemoryConsumer(manager);
+    c1.use(100);
+    assert(c1.getUsed() == 100);
+    c2.use(100);
+    assert(c2.getUsed() == 100);
+    assert(c1.getUsed() == 0);  // spilled
+    c1.use(100);
+    assert(c1.getUsed() == 100);
+    assert(c2.getUsed() == 0);  // spilled
+
+    c1.use(50);
+    assert(c1.getUsed() == 50);  // spilled
+    assert(c2.getUsed() == 0);
+    c2.use(50);
+    assert(c1.getUsed() == 50);
+    assert(c2.getUsed() == 50);
+
+    c1.use(100);
+    assert(c1.getUsed() == 100);
+    assert(c2.getUsed() == 0);  // spilled
+
+    c1.free(20);
+    assert(c1.getUsed() == 80);
+    c2.use(10);
+    assert(c1.getUsed() == 80);
+    assert(c2.getUsed() == 10);
+    c2.use(100);
+    assert(c2.getUsed() == 100);
+    assert(c1.getUsed() == 0);  // spilled
+
+    c1.free(0);
+    c2.free(100);
+    assert(manager.cleanUpAllAllocatedMemory() == 0);
+  }
+
 }
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
index 7fb2f92ca80e..9a43f1f3a923 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/PackedRecordPointerSuite.java
@@ -17,25 +17,29 @@
 
 package org.apache.spark.shuffle.sort;
 
-import org.apache.spark.shuffle.sort.PackedRecordPointer;
+import java.io.IOException;
+
 import org.junit.Test;
-import static org.junit.Assert.*;
 
 import org.apache.spark.SparkConf;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
-import org.apache.spark.unsafe.memory.MemoryBlock;
+import org.apache.spark.memory.TestMemoryManager;
 import org.apache.spark.memory.TaskMemoryManager;
-import static org.apache.spark.shuffle.sort.PackedRecordPointer.*;
+import org.apache.spark.unsafe.memory.MemoryBlock;
+
+import static org.apache.spark.shuffle.sort.PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES;
+import static org.apache.spark.shuffle.sort.PackedRecordPointer.MAXIMUM_PARTITION_ID;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 
 public class PackedRecordPointerSuite {
 
   @Test
-  public void heap() {
+  public void heap() throws IOException {
     final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "false");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
-    final MemoryBlock page0 = memoryManager.allocatePage(128);
-    final MemoryBlock page1 = memoryManager.allocatePage(128);
+      new TaskMemoryManager(new TestMemoryManager(conf), 0);
+    final MemoryBlock page0 = memoryManager.allocatePage(128, null);
+    final MemoryBlock page1 = memoryManager.allocatePage(128, null);
     final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
       page1.getBaseOffset() + 42);
     PackedRecordPointer packedPointer = new PackedRecordPointer();
@@ -49,12 +53,12 @@ public void heap() {
   }
 
   @Test
-  public void offHeap() {
+  public void offHeap() throws IOException {
     final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "true");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
-    final MemoryBlock page0 = memoryManager.allocatePage(128);
-    final MemoryBlock page1 = memoryManager.allocatePage(128);
+      new TaskMemoryManager(new TestMemoryManager(conf), 0);
+    final MemoryBlock page0 = memoryManager.allocatePage(128, null);
+    final MemoryBlock page1 = memoryManager.allocatePage(128, null);
     final long addressInPage1 = memoryManager.encodePageNumberAndOffset(page1,
       page1.getBaseOffset() + 42);
     PackedRecordPointer packedPointer = new PackedRecordPointer();
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
index 5049a5306ff2..2293b1bbc113 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
@@ -26,7 +26,7 @@
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.SparkConf;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
+import org.apache.spark.memory.TestMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.memory.TaskMemoryManager;
 
@@ -60,8 +60,8 @@ public void testBasicSorting() throws Exception {
     };
     final SparkConf conf = new SparkConf().set("spark.unsafe.offHeap", "false");
     final TaskMemoryManager memoryManager =
-      new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
-    final MemoryBlock dataPage = memoryManager.allocatePage(2048);
+      new TaskMemoryManager(new TestMemoryManager(conf), 0);
+    final MemoryBlock dataPage = memoryManager.allocatePage(2048, null);
     final Object baseObject = dataPage.getBaseObject();
     final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
     final HashPartitioner hashPartitioner = new HashPartitioner(4);
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
index d65926949c03..4763395d7d40 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
@@ -54,13 +54,14 @@
 import org.apache.spark.scheduler.MapStatus;
 import org.apache.spark.shuffle.IndexShuffleBlockResolver;
 import org.apache.spark.storage.*;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
+import org.apache.spark.memory.TestMemoryManager;
 import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
 public class UnsafeShuffleWriterSuite {
 
   static final int NUM_PARTITITONS = 4;
+  TestMemoryManager memoryManager;
   TaskMemoryManager taskMemoryManager;
   final HashPartitioner hashPartitioner = new HashPartitioner(NUM_PARTITITONS);
   File mergedOutputFile;
@@ -106,10 +107,11 @@ public void setUp() throws IOException {
     partitionSizesInMergedFile = null;
     spillFilesCreated.clear();
     conf = new SparkConf()
-      .set("spark.buffer.pageSize", "128m")
+      .set("spark.buffer.pageSize", "1m")
       .set("spark.unsafe.offHeap", "false");
     taskMetrics = new TaskMetrics();
-    taskMemoryManager =  new TaskMemoryManager(new GrantEverythingMemoryManager(conf), 0);
+    memoryManager = new TestMemoryManager(conf);
+    taskMemoryManager =  new TaskMemoryManager(memoryManager, 0);
 
     when(blockManager.diskBlockManager()).thenReturn(diskBlockManager);
     when(blockManager.getDiskWriter(
@@ -344,9 +346,7 @@ private void testMergingSpills(
     }
     assertEquals(sumOfPartitionSizes, mergedOutputFile.length());
 
-    assertEquals(
-      HashMultiset.create(dataToWrite),
-      HashMultiset.create(readRecordsFromFile()));
+    assertEquals(HashMultiset.create(dataToWrite), HashMultiset.create(readRecordsFromFile()));
     assertSpillFilesWereCleanedUp();
     ShuffleWriteMetrics shuffleWriteMetrics = taskMetrics.shuffleWriteMetrics().get();
     assertEquals(dataToWrite.size(), shuffleWriteMetrics.shuffleRecordsWritten());
@@ -398,20 +398,14 @@ public void mergeSpillsWithFileStreamAndNoCompression() throws Exception {
 
   @Test
   public void writeEnoughDataToTriggerSpill() throws Exception {
-    taskMemoryManager = spy(taskMemoryManager);
-    doCallRealMethod() // initialize sort buffer
-      .doCallRealMethod() // allocate initial data page
-      .doReturn(0L) // deny request to allocate new page
-      .doCallRealMethod() // grant new sort buffer and data page
-      .when(taskMemoryManager).acquireExecutionMemory(anyLong());
+    memoryManager.limit(PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES);
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
     final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<Product2<Object, Object>>();
-    final byte[] bigByteArray = new byte[PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES / 128];
-    for (int i = 0; i < 128 + 1; i++) {
+    final byte[] bigByteArray = new byte[PackedRecordPointer.MAXIMUM_PAGE_SIZE_BYTES / 10];
+    for (int i = 0; i < 10 + 1; i++) {
       dataToWrite.add(new Tuple2<Object, Object>(i, bigByteArray));
     }
     writer.write(dataToWrite.iterator());
-    verify(taskMemoryManager, times(5)).acquireExecutionMemory(anyLong());
     assertEquals(2, spillFilesCreated.size());
     writer.stop(true);
     readRecordsFromFile();
@@ -426,19 +420,13 @@ public void writeEnoughDataToTriggerSpill() throws Exception {
 
   @Test
   public void writeEnoughRecordsToTriggerSortBufferExpansionAndSpill() throws Exception {
-    taskMemoryManager = spy(taskMemoryManager);
-    doCallRealMethod() // initialize sort buffer
-      .doCallRealMethod() // allocate initial data page
-      .doReturn(0L) // deny request to allocate new page
-      .doCallRealMethod() // grant new sort buffer and data page
-      .when(taskMemoryManager).acquireExecutionMemory(anyLong());
+    memoryManager.limit(UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE * 16);
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
     final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<>();
     for (int i = 0; i < UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE; i++) {
       dataToWrite.add(new Tuple2<Object, Object>(i, i));
     }
     writer.write(dataToWrite.iterator());
-    verify(taskMemoryManager, times(5)).acquireExecutionMemory(anyLong());
     assertEquals(2, spillFilesCreated.size());
     writer.stop(true);
     readRecordsFromFile();
@@ -473,11 +461,11 @@ public void writeRecordsThatAreBiggerThanMaxRecordSize() throws Exception {
     final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<Product2<Object, Object>>();
     dataToWrite.add(new Tuple2<Object, Object>(1, ByteBuffer.wrap(new byte[1])));
     // We should be able to write a record that's right _at_ the max record size
-    final byte[] atMaxRecordSize = new byte[writer.maxRecordSizeBytes()];
+    final byte[] atMaxRecordSize = new byte[(int) taskMemoryManager.pageSizeBytes() - 4];
     new Random(42).nextBytes(atMaxRecordSize);
     dataToWrite.add(new Tuple2<Object, Object>(2, ByteBuffer.wrap(atMaxRecordSize)));
     // Inserting a record that's larger than the max record size
-    final byte[] exceedsMaxRecordSize = new byte[writer.maxRecordSizeBytes() + 1];
+    final byte[] exceedsMaxRecordSize = new byte[(int) taskMemoryManager.pageSizeBytes()];
     new Random(42).nextBytes(exceedsMaxRecordSize);
     dataToWrite.add(new Tuple2<Object, Object>(3, ByteBuffer.wrap(exceedsMaxRecordSize)));
     writer.write(dataToWrite.iterator());
@@ -524,7 +512,7 @@ public void testPeakMemoryUsed() throws Exception {
       for (int i = 0; i < numRecordsPerPage * 10; i++) {
         writer.insertRecordIntoSorter(new Tuple2<Object, Object>(1, 1));
         newPeakMemory = writer.getPeakMemoryUsedBytes();
-        if (i % numRecordsPerPage == 0 && i != 0) {
+        if (i % numRecordsPerPage == 0) {
           // The first page is allocated in constructor, another page will be allocated after
           // every numRecordsPerPage records (peak memory should change).
           assertEquals(previousPeakMemory + pageSizeBytes, newPeakMemory);
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
index 6e52496cf933..92bd45e5fa24 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
@@ -17,40 +17,117 @@
 
 package org.apache.spark.unsafe.map;
 
-import java.lang.Exception;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.util.*;
 
-import org.apache.spark.memory.TaskMemoryManager;
-import org.junit.*;
-import static org.hamcrest.Matchers.greaterThan;
-import static org.junit.Assert.*;
+import scala.Tuple2;
+import scala.Tuple2$;
+import scala.runtime.AbstractFunction1;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 
 import org.apache.spark.SparkConf;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
-import org.apache.spark.unsafe.array.ByteArrayMethods;
-import org.apache.spark.unsafe.memory.*;
+import org.apache.spark.executor.ShuffleWriteMetrics;
+import org.apache.spark.memory.TestMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.serializer.SerializerInstance;
+import org.apache.spark.storage.*;
 import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.ByteArrayMethods;
+import org.apache.spark.unsafe.memory.MemoryLocation;
+import org.apache.spark.util.Utils;
+
+import static org.hamcrest.Matchers.greaterThan;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.mockito.AdditionalAnswers.returnsSecondArg;
+import static org.mockito.Answers.RETURNS_SMART_NULLS;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyInt;
+import static org.mockito.Mockito.when;
 
 
 public abstract class AbstractBytesToBytesMapSuite {
 
   private final Random rand = new Random(42);
 
-  private GrantEverythingMemoryManager memoryManager;
+  private TestMemoryManager memoryManager;
   private TaskMemoryManager taskMemoryManager;
   private final long PAGE_SIZE_BYTES = 1L << 26; // 64 megabytes
 
+  final LinkedList<File> spillFilesCreated = new LinkedList<File>();
+  File tempDir;
+
+  @Mock(answer = RETURNS_SMART_NULLS) BlockManager blockManager;
+  @Mock(answer = RETURNS_SMART_NULLS) DiskBlockManager diskBlockManager;
+
+  private static final class CompressStream extends AbstractFunction1<OutputStream, OutputStream> {
+    @Override
+    public OutputStream apply(OutputStream stream) {
+      return stream;
+    }
+  }
+
   @Before
   public void setup() {
     memoryManager =
-      new GrantEverythingMemoryManager(
+      new TestMemoryManager(
         new SparkConf().set("spark.unsafe.offHeap", "" + useOffHeapMemoryAllocator()));
     taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
+
+    tempDir = Utils.createTempDir(System.getProperty("java.io.tmpdir"), "unsafe-test");
+    spillFilesCreated.clear();
+    MockitoAnnotations.initMocks(this);
+    when(blockManager.diskBlockManager()).thenReturn(diskBlockManager);
+    when(diskBlockManager.createTempLocalBlock()).thenAnswer(new Answer<Tuple2<TempLocalBlockId, File>>() {
+      @Override
+      public Tuple2<TempLocalBlockId, File> answer(InvocationOnMock invocationOnMock) throws Throwable {
+        TempLocalBlockId blockId = new TempLocalBlockId(UUID.randomUUID());
+        File file = File.createTempFile("spillFile", ".spill", tempDir);
+        spillFilesCreated.add(file);
+        return Tuple2$.MODULE$.apply(blockId, file);
+      }
+    });
+    when(blockManager.getDiskWriter(
+      any(BlockId.class),
+      any(File.class),
+      any(SerializerInstance.class),
+      anyInt(),
+      any(ShuffleWriteMetrics.class))).thenAnswer(new Answer<DiskBlockObjectWriter>() {
+      @Override
+      public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Throwable {
+        Object[] args = invocationOnMock.getArguments();
+
+        return new DiskBlockObjectWriter(
+          (File) args[1],
+          (SerializerInstance) args[2],
+          (Integer) args[3],
+          new CompressStream(),
+          false,
+          (ShuffleWriteMetrics) args[4]
+        );
+      }
+    });
+    when(blockManager.wrapForCompression(any(BlockId.class), any(InputStream.class)))
+      .then(returnsSecondArg());
   }
 
   @After
   public void tearDown() {
+    Utils.deleteRecursively(tempDir);
+    tempDir = null;
+
     Assert.assertEquals(0L, taskMemoryManager.cleanUpAllAllocatedMemory());
     if (taskMemoryManager != null) {
       long leakedMemory = taskMemoryManager.getMemoryConsumptionForThisTask();
@@ -415,9 +492,8 @@ public void randomizedTestWithRecordsLargerThanPageSize() {
 
   @Test
   public void failureToAllocateFirstPage() {
-    memoryManager.markExecutionAsOutOfMemory();
+    memoryManager.limit(1024);  // longArray
     BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1, PAGE_SIZE_BYTES);
-    memoryManager.markExecutionAsOutOfMemory();
     try {
       final long[] emptyArray = new long[0];
       final BytesToBytesMap.Location loc =
@@ -439,7 +515,7 @@ public void failureToGrow() {
       int i;
       for (i = 0; i < 127; i++) {
         if (i > 0) {
-          memoryManager.markExecutionAsOutOfMemory();
+          memoryManager.limit(0);
         }
         final long[] arr = new long[]{i};
         final BytesToBytesMap.Location loc = map.lookup(arr, Platform.LONG_ARRAY_OFFSET, 8);
@@ -456,6 +532,44 @@ public void failureToGrow() {
     }
   }
 
+  @Test
+  public void spillInIterator() throws IOException {
+    BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, blockManager, 1, 0.75, 1024, false);
+    try {
+      int i;
+      for (i = 0; i < 1024; i++) {
+        final long[] arr = new long[]{i};
+        final BytesToBytesMap.Location loc = map.lookup(arr, Platform.LONG_ARRAY_OFFSET, 8);
+        loc.putNewKey(arr, Platform.LONG_ARRAY_OFFSET, 8, arr, Platform.LONG_ARRAY_OFFSET, 8);
+      }
+      BytesToBytesMap.MapIterator iter = map.iterator();
+      for (i = 0; i < 100; i++) {
+        iter.next();
+      }
+      // Non-destructive iterator is not spillable
+      Assert.assertEquals(0, iter.spill(1024L * 10));
+      for (i = 100; i < 1024; i++) {
+        iter.next();
+      }
+
+      BytesToBytesMap.MapIterator iter2 = map.destructiveIterator();
+      for (i = 0; i < 100; i++) {
+        iter2.next();
+      }
+      Assert.assertTrue(iter2.spill(1024) >= 1024);
+      for (i = 100; i < 1024; i++) {
+        iter2.next();
+      }
+      assertFalse(iter2.hasNext());
+    } finally {
+      map.free();
+      for (File spillFile : spillFilesCreated) {
+        assertFalse("Spill file " + spillFile.getPath() + " was not cleaned up",
+          spillFile.exists());
+      }
+    }
+  }
+
   @Test
   public void initialCapacityBoundsChecking() {
     try {
@@ -500,7 +614,7 @@ public void testPeakMemoryUsed() {
           Platform.LONG_ARRAY_OFFSET,
           8);
         newPeakMemory = map.getPeakMemoryUsedBytes();
-        if (i % numRecordsPerPage == 0 && i > 0) {
+        if (i % numRecordsPerPage == 0) {
           // We allocated a new page for this record, so peak memory should change
           assertEquals(previousPeakMemory + pageSizeBytes, newPeakMemory);
         } else {
@@ -519,11 +633,4 @@ public void testPeakMemoryUsed() {
     }
   }
 
-  @Test
-  public void testAcquirePageInConstructor() {
-    final BytesToBytesMap map = new BytesToBytesMap(taskMemoryManager, 1, PAGE_SIZE_BYTES);
-    assertEquals(1, map.getNumDataPages());
-    map.free();
-  }
-
 }
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
index 94d50b94fde3..cfead0e5924b 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
@@ -36,28 +36,29 @@
 import org.mockito.MockitoAnnotations;
 import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
-import static org.hamcrest.Matchers.greaterThanOrEqualTo;
-import static org.junit.Assert.*;
-import static org.mockito.AdditionalAnswers.returnsSecondArg;
-import static org.mockito.Answers.RETURNS_SMART_NULLS;
-import static org.mockito.Mockito.*;
 
 import org.apache.spark.SparkConf;
 import org.apache.spark.TaskContext;
 import org.apache.spark.executor.ShuffleWriteMetrics;
 import org.apache.spark.executor.TaskMetrics;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
+import org.apache.spark.memory.TestMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.serializer.SerializerInstance;
 import org.apache.spark.storage.*;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.Utils;
 
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.junit.Assert.*;
+import static org.mockito.AdditionalAnswers.returnsSecondArg;
+import static org.mockito.Answers.RETURNS_SMART_NULLS;
+import static org.mockito.Mockito.*;
+
 public class UnsafeExternalSorterSuite {
 
   final LinkedList<File> spillFilesCreated = new LinkedList<File>();
-  final GrantEverythingMemoryManager memoryManager =
-    new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"));
+  final TestMemoryManager memoryManager =
+    new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"));
   final TaskMemoryManager taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
   // Use integer comparison for comparing prefixes (which are partition ids, in this case)
   final PrefixComparator prefixComparator = new PrefixComparator() {
@@ -86,7 +87,7 @@ public int compare(
   @Mock(answer = RETURNS_SMART_NULLS) TaskContext taskContext;
 
 
-  private final long pageSizeBytes = new SparkConf().getSizeAsBytes("spark.buffer.pageSize", "64m");
+  private final long pageSizeBytes = new SparkConf().getSizeAsBytes("spark.buffer.pageSize", "4m");
 
   private static final class CompressStream extends AbstractFunction1<OutputStream, OutputStream> {
     @Override
@@ -233,7 +234,7 @@ public void spillingOccursInResponseToMemoryPressure() throws Exception {
       insertNumber(sorter, numRecords - i);
     }
     assertEquals(1, sorter.getNumberOfAllocatedPages());
-    memoryManager.markExecutionAsOutOfMemory();
+    memoryManager.markExecutionAsOutOfMemoryOnce();
     // The insertion of this record should trigger a spill:
     insertNumber(sorter, 0);
     // Ensure that spill files were created
@@ -311,6 +312,62 @@ public void sortingRecordsThatExceedPageSize() throws Exception {
     assertSpillFilesWereCleanedUp();
   }
 
+  @Test
+  public void forcedSpillingWithReadIterator() throws Exception {
+    final UnsafeExternalSorter sorter = newSorter();
+    long[] record = new long[100];
+    int recordSize = record.length * 8;
+    int n = (int) pageSizeBytes / recordSize * 3;
+    for (int i = 0; i < n; i++) {
+      record[0] = (long) i;
+      sorter.insertRecord(record, Platform.LONG_ARRAY_OFFSET, recordSize, 0);
+    }
+    assert(sorter.getNumberOfAllocatedPages() >= 2);
+    UnsafeExternalSorter.SpillableIterator iter =
+      (UnsafeExternalSorter.SpillableIterator) sorter.getSortedIterator();
+    int lastv = 0;
+    for (int i = 0; i < n / 3; i++) {
+      iter.hasNext();
+      iter.loadNext();
+      assert(Platform.getLong(iter.getBaseObject(), iter.getBaseOffset()) == i);
+      lastv = i;
+    }
+    assert(iter.spill() > 0);
+    assert(iter.spill() == 0);
+    assert(Platform.getLong(iter.getBaseObject(), iter.getBaseOffset()) == lastv);
+    for (int i = n / 3; i < n; i++) {
+      iter.hasNext();
+      iter.loadNext();
+      assert(Platform.getLong(iter.getBaseObject(), iter.getBaseOffset()) == i);
+    }
+    sorter.cleanupResources();
+    assertSpillFilesWereCleanedUp();
+  }
+
+  @Test
+  public void forcedSpillingWithNotReadIterator() throws Exception {
+    final UnsafeExternalSorter sorter = newSorter();
+    long[] record = new long[100];
+    int recordSize = record.length * 8;
+    int n = (int) pageSizeBytes / recordSize * 3;
+    for (int i = 0; i < n; i++) {
+      record[0] = (long) i;
+      sorter.insertRecord(record, Platform.LONG_ARRAY_OFFSET, recordSize, 0);
+    }
+    assert(sorter.getNumberOfAllocatedPages() >= 2);
+    UnsafeExternalSorter.SpillableIterator iter =
+      (UnsafeExternalSorter.SpillableIterator) sorter.getSortedIterator();
+    assert(iter.spill() > 0);
+    assert(iter.spill() == 0);
+    for (int i = 0; i < n; i++) {
+      iter.hasNext();
+      iter.loadNext();
+      assert(Platform.getLong(iter.getBaseObject(), iter.getBaseOffset()) == i);
+    }
+    sorter.cleanupResources();
+    assertSpillFilesWereCleanedUp();
+  }
+
   @Test
   public void testPeakMemoryUsed() throws Exception {
     final long recordLengthBytes = 8;
@@ -334,7 +391,7 @@ public void testPeakMemoryUsed() throws Exception {
         insertNumber(sorter, i);
         newPeakMemory = sorter.getPeakMemoryUsedBytes();
         // The first page is pre-allocated on instantiation
-        if (i % numRecordsPerPage == 0 && i > 0) {
+        if (i % numRecordsPerPage == 0) {
           // We allocated a new page for this record, so peak memory should change
           assertEquals(previousPeakMemory + pageSizeBytes, newPeakMemory);
         } else {
@@ -358,21 +415,5 @@ public void testPeakMemoryUsed() throws Exception {
     }
   }
 
-  @Test
-  public void testReservePageOnInstantiation() throws Exception {
-    final UnsafeExternalSorter sorter = newSorter();
-    try {
-      assertEquals(1, sorter.getNumberOfAllocatedPages());
-      // Inserting a new record doesn't allocate more memory since we already have a page
-      long peakMemory = sorter.getPeakMemoryUsedBytes();
-      insertNumber(sorter, 100);
-      assertEquals(peakMemory, sorter.getPeakMemoryUsedBytes());
-      assertEquals(1, sorter.getNumberOfAllocatedPages());
-    } finally {
-      sorter.cleanupResources();
-      assertSpillFilesWereCleanedUp();
-    }
-  }
-
 }
 
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
index d5de56a0512f..642f6585f8a1 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
@@ -20,17 +20,19 @@
 import java.util.Arrays;
 
 import org.junit.Test;
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.*;
-import static org.junit.Assert.*;
-import static org.mockito.Mockito.mock;
 
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.SparkConf;
+import org.apache.spark.memory.TestMemoryManager;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.memory.GrantEverythingMemoryManager;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.memory.TaskMemoryManager;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.isIn;
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
 
 public class UnsafeInMemorySorterSuite {
 
@@ -44,7 +46,7 @@ private static String getStringFromDataPage(Object baseObject, long baseOffset,
   public void testSortingEmptyInput() {
     final UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(
       new TaskMemoryManager(
-        new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0),
+        new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0),
       mock(RecordComparator.class),
       mock(PrefixComparator.class),
       100);
@@ -66,8 +68,8 @@ public void testSortingOnlyByIntegerPrefix() throws Exception {
       "Mango"
     };
     final TaskMemoryManager memoryManager = new TaskMemoryManager(
-      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
-    final MemoryBlock dataPage = memoryManager.allocatePage(2048);
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+    final MemoryBlock dataPage = memoryManager.allocatePage(2048, null);
     final Object baseObject = dataPage.getBaseObject();
     // Write the records into the data page:
     long position = dataPage.getBaseOffset();
diff --git a/core/src/test/scala/org/apache/spark/FailureSuite.scala b/core/src/test/scala/org/apache/spark/FailureSuite.scala
index 0242cbc9244a..203dab934ca1 100644
--- a/core/src/test/scala/org/apache/spark/FailureSuite.scala
+++ b/core/src/test/scala/org/apache/spark/FailureSuite.scala
@@ -149,7 +149,7 @@ class FailureSuite extends SparkFunSuite with LocalSparkContext {
     // cause is preserved
     val thrownDueToTaskFailure = intercept[SparkException] {
       sc.parallelize(Seq(0)).mapPartitions { iter =>
-        TaskContext.get().taskMemoryManager().allocatePage(128)
+        TaskContext.get().taskMemoryManager().allocatePage(128, null)
         throw new Exception("intentional task failure")
         iter
       }.count()
@@ -159,7 +159,7 @@ class FailureSuite extends SparkFunSuite with LocalSparkContext {
     // If the task succeeded but memory was leaked, then the task should fail due to that leak
     val thrownDueToMemoryLeak = intercept[SparkException] {
       sc.parallelize(Seq(0)).mapPartitions { iter =>
-        TaskContext.get().taskMemoryManager().allocatePage(128)
+        TaskContext.get().taskMemoryManager().allocatePage(128, null)
         iter
       }.count()
     }
diff --git a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
index 1265087743a9..4a9479cf490f 100644
--- a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
@@ -145,20 +145,20 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val manager = createMemoryManager(1000L)
     val taskMemoryManager = new TaskMemoryManager(manager, 0)
 
-    assert(taskMemoryManager.acquireExecutionMemory(100L) === 100L)
-    assert(taskMemoryManager.acquireExecutionMemory(400L) === 400L)
-    assert(taskMemoryManager.acquireExecutionMemory(400L) === 400L)
-    assert(taskMemoryManager.acquireExecutionMemory(200L) === 100L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L, null) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L, null) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(200L, null) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
 
-    taskMemoryManager.releaseExecutionMemory(500L)
-    assert(taskMemoryManager.acquireExecutionMemory(300L) === 300L)
-    assert(taskMemoryManager.acquireExecutionMemory(300L) === 200L)
+    taskMemoryManager.releaseExecutionMemory(500L, null)
+    assert(taskMemoryManager.acquireExecutionMemory(300L, null) === 300L)
+    assert(taskMemoryManager.acquireExecutionMemory(300L, null) === 200L)
 
     taskMemoryManager.cleanUpAllAllocatedMemory()
-    assert(taskMemoryManager.acquireExecutionMemory(1000L) === 1000L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(1000L, null) === 1000L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
   }
 
   test("two tasks requesting full execution memory") {
@@ -168,15 +168,15 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val futureTimeout: Duration = 20.seconds
 
     // Have both tasks request 500 bytes, then wait until both requests have been granted:
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(500L) }
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     assert(Await.result(t1Result1, futureTimeout) === 500L)
     assert(Await.result(t2Result1, futureTimeout) === 500L)
 
     // Have both tasks each request 500 bytes more; both should immediately return 0 as they are
     // both now at 1 / N
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L) }
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     assert(Await.result(t1Result2, 200.millis) === 0L)
     assert(Await.result(t2Result2, 200.millis) === 0L)
   }
@@ -188,15 +188,15 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val futureTimeout: Duration = 20.seconds
 
     // Have both tasks request 250 bytes, then wait until both requests have been granted:
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(250L) }
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(250L, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, null) }
     assert(Await.result(t1Result1, futureTimeout) === 250L)
     assert(Await.result(t2Result1, futureTimeout) === 250L)
 
     // Have both tasks each request 500 bytes more.
     // We should only grant 250 bytes to each of them on this second request
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L) }
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     assert(Await.result(t1Result2, futureTimeout) === 250L)
     assert(Await.result(t2Result2, futureTimeout) === 250L)
   }
@@ -208,17 +208,17 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val futureTimeout: Duration = 20.seconds
 
     // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, null) }
     assert(Await.result(t1Result1, futureTimeout) === 1000L)
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, null) }
     // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
     // to make sure the other thread blocks for some time otherwise.
     Thread.sleep(300)
-    t1MemManager.releaseExecutionMemory(250L)
+    t1MemManager.releaseExecutionMemory(250L, null)
     // The memory freed from t1 should now be granted to t2.
     assert(Await.result(t2Result1, futureTimeout) === 250L)
     // Further requests by t2 should be denied immediately because it now has 1 / 2N of the memory.
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(100L) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(100L, null) }
     assert(Await.result(t2Result2, 200.millis) === 0L)
   }
 
@@ -229,18 +229,18 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val futureTimeout: Duration = 20.seconds
 
     // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, null) }
     assert(Await.result(t1Result1, futureTimeout) === 1000L)
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
     // to make sure the other thread blocks for some time otherwise.
     Thread.sleep(300)
     // t1 releases all of its memory, so t2 should be able to grab all of the memory
     t1MemManager.cleanUpAllAllocatedMemory()
     assert(Await.result(t2Result1, futureTimeout) === 500L)
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     assert(Await.result(t2Result2, futureTimeout) === 500L)
-    val t2Result3 = Future { t2MemManager.acquireExecutionMemory(500L) }
+    val t2Result3 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
     assert(Await.result(t2Result3, 200.millis) === 0L)
   }
 
@@ -251,13 +251,13 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val t2MemManager = new TaskMemoryManager(memoryManager, 2)
     val futureTimeout: Duration = 20.seconds
 
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(700L) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(700L, null) }
     assert(Await.result(t1Result1, futureTimeout) === 700L)
 
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(300L) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(300L, null) }
     assert(Await.result(t2Result1, futureTimeout) === 300L)
 
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(300L) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(300L, null) }
     assert(Await.result(t1Result2, 200.millis) === 0L)
   }
 }
diff --git a/core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala b/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
similarity index 71%
rename from core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala
rename to core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
index fe102d8aeb2a..77e43554ee27 100644
--- a/core/src/test/scala/org/apache/spark/memory/GrantEverythingMemoryManager.scala
+++ b/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
@@ -22,16 +22,22 @@ import scala.collection.mutable
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockStatus, BlockId}
 
-class GrantEverythingMemoryManager(conf: SparkConf) extends MemoryManager(conf, numCores = 1) {
+class TestMemoryManager(conf: SparkConf) extends MemoryManager(conf, numCores = 1) {
   private[memory] override def doAcquireExecutionMemory(
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
-    if (oom) {
-      oom = false
+    if (oomOnce) {
+      oomOnce = false
       0
-    } else {
+    } else if (available >= numBytes) {
       _executionMemoryUsed += numBytes // To suppress warnings when freeing unallocated memory
+      available -= numBytes
       numBytes
+    } else {
+      _executionMemoryUsed += available
+      val grant = available
+      available = 0
+      grant
     }
   }
   override def acquireStorageMemory(
@@ -42,13 +48,23 @@ class GrantEverythingMemoryManager(conf: SparkConf) extends MemoryManager(conf,
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
-  override def releaseStorageMemory(numBytes: Long): Unit = { }
+  override def releaseExecutionMemory(numBytes: Long): Unit = {
+    available += numBytes
+    _executionMemoryUsed -= numBytes
+  }
+  override def releaseStorageMemory(numBytes: Long): Unit = {}
   override def maxExecutionMemory: Long = Long.MaxValue
   override def maxStorageMemory: Long = Long.MaxValue
 
-  private var oom = false
+  private var oomOnce = false
+  private var available = Long.MaxValue
 
-  def markExecutionAsOutOfMemory(): Unit = {
-    oom = true
+  def markExecutionAsOutOfMemoryOnce(): Unit = {
+    oomOnce = true
   }
+
+  def limit(avail: Long): Unit = {
+    available = avail
+  }
+
 }
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
index 810c74fd2fb9..f7063d1e5c82 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
@@ -96,15 +96,10 @@ void insertRow(UnsafeRow row) throws IOException {
     );
     numRowsInserted++;
     if (testSpillFrequency > 0 && (numRowsInserted % testSpillFrequency) == 0) {
-      spill();
+      sorter.spill();
     }
   }
 
-  @VisibleForTesting
-  void spill() throws IOException {
-    sorter.spill();
-  }
-
   /**
    * Return the peak memory used so far, in bytes.
    */
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
index 82c645df284d..889f97003450 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
@@ -165,7 +165,7 @@ public UnsafeRow getAggregationBufferFromUnsafeRow(UnsafeRow unsafeGroupingKeyRo
   public KVIterator<UnsafeRow, UnsafeRow> iterator() {
     return new KVIterator<UnsafeRow, UnsafeRow>() {
 
-      private final BytesToBytesMap.BytesToBytesMapIterator mapLocationIterator =
+      private final BytesToBytesMap.MapIterator mapLocationIterator =
         map.destructiveIterator();
       private final UnsafeRow key = new UnsafeRow();
       private final UnsafeRow value = new UnsafeRow();
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index 46301f004295..845f2ae6859b 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -17,13 +17,13 @@
 
 package org.apache.spark.sql.execution;
 
-import java.io.IOException;
-
 import javax.annotation.Nullable;
+import java.io.IOException;
 
 import com.google.common.annotations.VisibleForTesting;
 
 import org.apache.spark.TaskContext;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
 import org.apache.spark.sql.catalyst.expressions.codegen.BaseOrdering;
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateOrdering;
@@ -33,7 +33,6 @@
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.map.BytesToBytesMap;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.util.collection.unsafe.sort.*;
 
 /**
@@ -84,18 +83,16 @@ public UnsafeKVExternalSorter(
         /* initialSize */ 4096,
         pageSizeBytes);
     } else {
-      // Insert the records into the in-memory sorter.
-      // We will use the number of elements in the map as the initialSize of the
-      // UnsafeInMemorySorter. Because UnsafeInMemorySorter does not accept 0 as the initialSize,
-      // we will use 1 as its initial size if the map is empty.
-      // TODO: track pointer array memory used by this in-memory sorter! (SPARK-10474)
+      // The memory needed for UnsafeInMemorySorter should be less than longArray in map.
+      map.freeArray();
+      // The memory used by UnsafeInMemorySorter will be counted later (end of this block)
       final UnsafeInMemorySorter inMemSorter = new UnsafeInMemorySorter(
         taskMemoryManager, recordComparator, prefixComparator, Math.max(1, map.numElements()));
 
       // We cannot use the destructive iterator here because we are reusing the existing memory
       // pages in BytesToBytesMap to hold records during sorting.
       // The only new memory we are allocating is the pointer/prefix array.
-      BytesToBytesMap.BytesToBytesMapIterator iter = map.iterator();
+      BytesToBytesMap.MapIterator iter = map.iterator();
       final int numKeyFields = keySchema.size();
       UnsafeRow row = new UnsafeRow();
       while (iter.hasNext()) {
@@ -117,7 +114,7 @@ public UnsafeKVExternalSorter(
       }
 
       sorter = UnsafeExternalSorter.createWithExistingInMemorySorter(
-        taskContext.taskMemoryManager(),
+        taskMemoryManager,
         blockManager,
         taskContext,
         new KVComparator(ordering, keySchema.length()),
@@ -128,6 +125,8 @@ public UnsafeKVExternalSorter(
 
       sorter.spill();
       map.free();
+      // counting the memory used UnsafeInMemorySorter
+      taskMemoryManager.acquireExecutionMemory(inMemSorter.getMemoryUsage(), sorter);
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
index dbf4863b767b..a38623623a44 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
@@ -24,7 +24,7 @@ import scala.util.{Try, Random}
 import org.scalatest.Matchers
 
 import org.apache.spark.{SparkConf, TaskContextImpl, TaskContext, SparkFunSuite}
-import org.apache.spark.memory.{TaskMemoryManager, GrantEverythingMemoryManager}
+import org.apache.spark.memory.{TaskMemoryManager, TestMemoryManager}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, UnsafeProjection}
 import org.apache.spark.sql.test.SharedSQLContext
@@ -48,7 +48,7 @@ class UnsafeFixedWidthAggregationMapSuite
   private def emptyAggregationBuffer: InternalRow = InternalRow(0)
   private val PAGE_SIZE_BYTES: Long = 1L << 26; // 64 megabytes
 
-  private var memoryManager: GrantEverythingMemoryManager = null
+  private var memoryManager: TestMemoryManager = null
   private var taskMemoryManager: TaskMemoryManager = null
 
   def testWithMemoryLeakDetection(name: String)(f: => Unit) {
@@ -62,7 +62,7 @@ class UnsafeFixedWidthAggregationMapSuite
 
     test(name) {
       val conf = new SparkConf().set("spark.unsafe.offHeap", "false")
-      memoryManager = new GrantEverythingMemoryManager(conf)
+      memoryManager = new TestMemoryManager(conf)
       taskMemoryManager = new TaskMemoryManager(memoryManager, 0)
 
       TaskContext.setTaskContext(new TaskContextImpl(
@@ -193,10 +193,6 @@ class UnsafeFixedWidthAggregationMapSuite
     // Convert the map into a sorter
     val sorter = map.destructAndCreateExternalSorter()
 
-    withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      assert(taskMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
-    }
-
     // Add more keys to the sorter and make sure the results come out sorted.
     val additionalKeys = randomStrings(1024)
     val keyConverter = UnsafeProjection.create(groupKeySchema)
@@ -208,7 +204,7 @@ class UnsafeFixedWidthAggregationMapSuite
       sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemoryOnce()
         sorter.closeCurrentPage()
       }
     }
@@ -251,7 +247,7 @@ class UnsafeFixedWidthAggregationMapSuite
       sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemoryOnce()
         sorter.closeCurrentPage()
       }
     }
@@ -294,16 +290,12 @@ class UnsafeFixedWidthAggregationMapSuite
     // Convert the map into a sorter. Right now, it contains one record.
     val sorter = map.destructAndCreateExternalSorter()
 
-    withClue(s"destructAndCreateExternalSorter should release memory used by the map") {
-      assert(taskMemoryManager.getMemoryConsumptionForThisTask() === initialMemoryConsumption)
-    }
-
     // Add more keys to the sorter and make sure the results come out sorted.
     (1 to 4096).foreach { i =>
       sorter.insertKV(UnsafeRow.createFromByteArray(0, 0), UnsafeRow.createFromByteArray(0, 0))
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemoryOnce()
         sorter.closeCurrentPage()
       }
     }
@@ -342,7 +334,7 @@ class UnsafeFixedWidthAggregationMapSuite
       buf.setInt(0, str.length)
     }
     // Simulate running out of space
-    memoryManager.markExecutionAsOutOfMemory()
+    memoryManager.limit(0)
     val str = rand.nextString(1024)
     val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
     assert(buf == null)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
index 13dc1754c9ff..7b80963ec870 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeKVExternalSorterSuite.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.execution
 import scala.util.Random
 
 import org.apache.spark._
-import org.apache.spark.memory.{TaskMemoryManager, GrantEverythingMemoryManager}
+import org.apache.spark.memory.{TaskMemoryManager, TestMemoryManager}
 import org.apache.spark.sql.{RandomDataGenerator, Row}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.{InterpretedOrdering, UnsafeRow, UnsafeProjection}
@@ -109,7 +109,7 @@ class UnsafeKVExternalSorterSuite extends SparkFunSuite with SharedSQLContext {
       pageSize: Long,
       spill: Boolean): Unit = {
     val memoryManager =
-      new GrantEverythingMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"))
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"))
     val taskMemMgr = new TaskMemoryManager(memoryManager, 0)
     TaskContext.setTaskContext(new TaskContextImpl(
       stageId = 0,
@@ -128,7 +128,7 @@ class UnsafeKVExternalSorterSuite extends SparkFunSuite with SharedSQLContext {
       sorter.insertKV(k.asInstanceOf[UnsafeRow], v.asInstanceOf[UnsafeRow])
       // 1% chance we will spill
       if (rand.nextDouble() < 0.01 && spill) {
-        memoryManager.markExecutionAsOutOfMemory()
+        memoryManager.markExecutionAsOutOfMemoryOnce()
         sorter.closeCurrentPage()
       }
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
deleted file mode 100644
index 475037bd4537..000000000000
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIteratorSuite.scala
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.aggregate
-
-import org.apache.spark._
-import org.apache.spark.memory.TaskMemoryManager
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.InterpretedMutableProjection
-import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.sql.test.SharedSQLContext
-
-class TungstenAggregationIteratorSuite extends SparkFunSuite with SharedSQLContext {
-
-  test("memory acquired on construction") {
-    val taskMemoryManager = new TaskMemoryManager(SparkEnv.get.memoryManager, 0)
-    val taskContext = new TaskContextImpl(0, 0, 0, 0, taskMemoryManager, null, Seq.empty)
-    TaskContext.setTaskContext(taskContext)
-
-    // Assert that a page is allocated before processing starts
-    var iter: TungstenAggregationIterator = null
-    try {
-      val newMutableProjection = (expr: Seq[Expression], schema: Seq[Attribute]) => {
-        () => new InterpretedMutableProjection(expr, schema)
-      }
-      val dummyAccum = SQLMetrics.createLongMetric(sparkContext, "dummy")
-      iter = new TungstenAggregationIterator(Seq.empty, Seq.empty, Seq.empty, Seq.empty, Seq.empty,
-        0, Seq.empty, newMutableProjection, Seq.empty, None,
-        dummyAccum, dummyAccum, dummyAccum, dummyAccum)
-      val numPages = iter.getHashMap.getNumDataPages
-      assert(numPages === 1)
-    } finally {
-      // Clean up
-      if (iter != null) {
-        iter.free()
-      }
-      TaskContext.unset()
-    }
-  }
-}
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java b/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
index ebe90d9e63d8..09847cec9c4c 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/memory/HeapMemoryAllocator.java
@@ -23,6 +23,8 @@
 import java.util.LinkedList;
 import java.util.Map;
 
+import org.apache.spark.unsafe.Platform;
+
 /**
  * A simple {@link MemoryAllocator} that can allocate up to 16GB using a JVM long primitive array.
  */
@@ -45,9 +47,6 @@ private boolean shouldPool(long size) {
 
   @Override
   public MemoryBlock allocate(long size) throws OutOfMemoryError {
-    if (size % 8 != 0) {
-      throw new IllegalArgumentException("Size " + size + " was not a multiple of 8");
-    }
     if (shouldPool(size)) {
       synchronized (this) {
         final LinkedList<WeakReference<MemoryBlock>> pool = bufferPoolsBySize.get(size);
@@ -64,8 +63,8 @@ public MemoryBlock allocate(long size) throws OutOfMemoryError {
         }
       }
     }
-    long[] array = new long[(int) (size / 8)];
-    return MemoryBlock.fromLongArray(array);
+    long[] array = new long[(int) ((size + 7) / 8)];
+    return new MemoryBlock(array, Platform.LONG_ARRAY_OFFSET, size);
   }
 
   @Override
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/memory/UnsafeMemoryAllocator.java b/unsafe/src/main/java/org/apache/spark/unsafe/memory/UnsafeMemoryAllocator.java
index cda7826c8c99..98ce711176e4 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/memory/UnsafeMemoryAllocator.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/memory/UnsafeMemoryAllocator.java
@@ -26,9 +26,6 @@ public class UnsafeMemoryAllocator implements MemoryAllocator {
 
   @Override
   public MemoryBlock allocate(long size) throws OutOfMemoryError {
-    if (size % 8 != 0) {
-      throw new IllegalArgumentException("Size " + size + " was not a multiple of 8");
-    }
     long address = Platform.allocateMemory(size);
     return new MemoryBlock(null, address, size);
   }

From eb59b94c450fe6391d24d44ff7ea9bd4c6893af8 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Fri, 30 Oct 2015 00:36:20 -0700
Subject: [PATCH 413/896] [SPARK-11417] [SQL] no @Override in codegen

Older version of Janino (>2.7) does not support Override, we should not use that in codegen.

Author: Davies Liu <davies@databricks.com>

Closes #9372 from davies/no_override.
---
 .../catalyst/expressions/codegen/GenerateOrdering.scala    | 1 -
 .../catalyst/expressions/codegen/GeneratePredicate.scala   | 1 -
 .../catalyst/expressions/codegen/GenerateProjection.scala  | 7 -------
 3 files changed, 9 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
index c2b420286f75..1af7c73cd4bf 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateOrdering.scala
@@ -126,7 +126,6 @@ object GenerateOrdering extends CodeGenerator[Seq[SortOrder], Ordering[InternalR
           ${initMutableStates(ctx)}
         }
 
-        @Override
         public int compare(InternalRow a, InternalRow b) {
           InternalRow ${ctx.INPUT_ROW} = null;  // Holds current row being evaluated.
           $comparisons
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
index ae6ffe6293c5..457b4f08424a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GeneratePredicate.scala
@@ -55,7 +55,6 @@ object GeneratePredicate extends CodeGenerator[Expression, (InternalRow) => Bool
           ${initMutableStates(ctx)}
         }
 
-        @Override
         public boolean eval(InternalRow ${ctx.INPUT_ROW}) {
           ${eval.code}
           return !${eval.isNull} && ${eval.value};
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
index dbcc9dc08408..c0d313b2e130 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
@@ -82,7 +82,6 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
       if (cases.length > 0) {
         val getter = "get" + ctx.primitiveTypeName(jt)
         s"""
-      @Override
       public $jt $getter(int i) {
         if (isNullAt(i)) {
           return ${ctx.defaultValue(jt)};
@@ -107,7 +106,6 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
       if (cases.length > 0) {
         val setter = "set" + ctx.primitiveTypeName(jt)
         s"""
-      @Override
       public void $setter(int i, $jt value) {
         nullBits[i] = false;
         switch (i) {
@@ -169,7 +167,6 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         ${initMutableStates(ctx)}
       }
 
-      @Override
       public Object apply(Object r) {
         // GenerateProjection does not work with UnsafeRows.
         assert(!(r instanceof ${classOf[UnsafeRow].getName}));
@@ -189,7 +186,6 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         public void setNullAt(int i) { nullBits[i] = true; }
         public boolean isNullAt(int i) { return nullBits[i]; }
 
-        @Override
         public Object genericGet(int i) {
           if (isNullAt(i)) return null;
           switch (i) {
@@ -210,14 +206,12 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         $specificAccessorFunctions
         $specificMutatorFunctions
 
-        @Override
         public int hashCode() {
           int result = 37;
           $hashUpdates
           return result;
         }
 
-        @Override
         public boolean equals(Object other) {
           if (other instanceof SpecificRow) {
             SpecificRow row = (SpecificRow) other;
@@ -227,7 +221,6 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
           return super.equals(other);
         }
 
-        @Override
         public InternalRow copy() {
           Object[] arr = new Object[${expressions.length}];
           ${copyColumns}

From 86d65265fcab7edab88a7bdb10acba47da95bcb3 Mon Sep 17 00:00:00 2001
From: Lewuathe <lewuathe@me.com>
Date: Fri, 30 Oct 2015 02:59:05 -0700
Subject: [PATCH 414/896] =?UTF-8?q?[SPARK-11207]=20[ML]=20Add=20test=20cas?=
 =?UTF-8?q?es=20for=20solver=20selection=20of=20LinearRegres=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…sion as followup. This is the follow up work of SPARK-10668.

* Fix miner style issues.
* Add test case for checking whether solver is selected properly.

Author: Lewuathe <lewuathe@me.com>
Author: lewuathe <lewuathe@me.com>

Closes #9180 from Lewuathe/SPARK-11207.
---
 .../mllib/util/LinearDataGenerator.scala      |  54 +++++-
 .../ml/regression/LinearRegressionSuite.scala | 172 ++++++++++--------
 2 files changed, 144 insertions(+), 82 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/util/LinearDataGenerator.scala b/mllib/src/main/scala/org/apache/spark/mllib/util/LinearDataGenerator.scala
index d0ba454f379a..6ff07eed6cfd 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/util/LinearDataGenerator.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/util/LinearDataGenerator.scala
@@ -77,13 +77,11 @@ object LinearDataGenerator {
       nPoints: Int,
       seed: Int,
       eps: Double = 0.1): Seq[LabeledPoint] = {
-    generateLinearInput(intercept, weights,
-      Array.fill[Double](weights.length)(0.0),
-      Array.fill[Double](weights.length)(1.0 / 3.0),
-      nPoints, seed, eps)}
+    generateLinearInput(intercept, weights, Array.fill[Double](weights.length)(0.0),
+      Array.fill[Double](weights.length)(1.0 / 3.0), nPoints, seed, eps)
+  }
 
   /**
-   *
    * @param intercept Data intercept
    * @param weights  Weights to be applied.
    * @param xMean the mean of the generated features. Lots of time, if the features are not properly
@@ -104,16 +102,49 @@ object LinearDataGenerator {
       nPoints: Int,
       seed: Int,
       eps: Double): Seq[LabeledPoint] = {
+    generateLinearInput(intercept, weights, xMean, xVariance, nPoints, seed, eps, 0.0)
+  }
+
 
+  /**
+   * @param intercept Data intercept
+   * @param weights  Weights to be applied.
+   * @param xMean the mean of the generated features. Lots of time, if the features are not properly
+   *              standardized, the algorithm with poor implementation will have difficulty
+   *              to converge.
+   * @param xVariance the variance of the generated features.
+   * @param nPoints Number of points in sample.
+   * @param seed Random seed
+   * @param eps Epsilon scaling factor.
+   * @param sparsity The ratio of zero elements. If it is 0.0, LabeledPoints with
+   *                 DenseVector is returned.
+   * @return Seq of input.
+   */
+  @Since("1.6.0")
+  def generateLinearInput(
+      intercept: Double,
+      weights: Array[Double],
+      xMean: Array[Double],
+      xVariance: Array[Double],
+      nPoints: Int,
+      seed: Int,
+      eps: Double,
+      sparsity: Double): Seq[LabeledPoint] = {
+    require(0.0 <= sparsity && sparsity <= 1.0)
     val rnd = new Random(seed)
     val x = Array.fill[Array[Double]](nPoints)(
       Array.fill[Double](weights.length)(rnd.nextDouble()))
 
+    val sparseRnd = new Random(seed)
     x.foreach { v =>
       var i = 0
       val len = v.length
       while (i < len) {
-        v(i) = (v(i) - 0.5) * math.sqrt(12.0 * xVariance(i)) + xMean(i)
+        if (sparseRnd.nextDouble() < sparsity) {
+          v(i) = 0.0
+        } else {
+          v(i) = (v(i) - 0.5) * math.sqrt(12.0 * xVariance(i)) + xMean(i)
+        }
         i += 1
       }
     }
@@ -121,7 +152,16 @@ object LinearDataGenerator {
     val y = x.map { xi =>
       blas.ddot(weights.length, xi, 1, weights, 1) + intercept + eps * rnd.nextGaussian()
     }
-    y.zip(x).map(p => LabeledPoint(p._1, Vectors.dense(p._2)))
+
+    y.zip(x).map { p =>
+      if (sparsity == 0.0) {
+        // Return LabeledPoints with DenseVector
+        LabeledPoint(p._1, Vectors.dense(p._2))
+      } else {
+        // Return LabeledPoints with SparseVector
+        LabeledPoint(p._1, Vectors.dense(p._2).toSparse)
+      }
+    }
   }
 
   /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index a6e0c72ba903..a2a5c0bbdcb9 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -32,8 +32,9 @@ import org.apache.spark.sql.{DataFrame, Row}
 class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
 
   private val seed: Int = 42
-  @transient var dataset: DataFrame = _
-  @transient var datasetWithoutIntercept: DataFrame = _
+  @transient var datasetWithDenseFeature: DataFrame = _
+  @transient var datasetWithDenseFeatureWithoutIntercept: DataFrame = _
+  @transient var datasetWithSparseFeature: DataFrame = _
 
   /*
      In `LinearRegressionSuite`, we will make sure that the model trained by SparkML
@@ -49,16 +50,29 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
    */
   override def beforeAll(): Unit = {
     super.beforeAll()
-    dataset = sqlContext.createDataFrame(
+    datasetWithDenseFeature = sqlContext.createDataFrame(
       sc.parallelize(LinearDataGenerator.generateLinearInput(
-        6.3, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, seed, 0.1), 2))
+        intercept = 6.3, weights = Array(4.7, 7.2), xMean = Array(0.9, -1.3),
+        xVariance = Array(0.7, 1.2), nPoints = 10000, seed, eps = 0.1), 2))
     /*
        datasetWithoutIntercept is not needed for correctness testing but is useful for illustrating
        training model without intercept
      */
-    datasetWithoutIntercept = sqlContext.createDataFrame(
+    datasetWithDenseFeatureWithoutIntercept = sqlContext.createDataFrame(
       sc.parallelize(LinearDataGenerator.generateLinearInput(
-        0.0, Array(4.7, 7.2), Array(0.9, -1.3), Array(0.7, 1.2), 10000, seed, 0.1), 2))
+        intercept = 0.0, weights = Array(4.7, 7.2), xMean = Array(0.9, -1.3),
+        xVariance = Array(0.7, 1.2), nPoints = 10000, seed, eps = 0.1), 2))
+
+    val r = new Random(seed)
+    // When feature size is larger than 4096, normal optimizer is choosed
+    // as the solver of linear regression in the case of "auto" mode.
+    val featureSize = 4100
+    datasetWithSparseFeature = sqlContext.createDataFrame(
+      sc.parallelize(LinearDataGenerator.generateLinearInput(
+        intercept = 0.0, weights = Seq.fill(featureSize)(r.nextDouble).toArray,
+        xMean = Seq.fill(featureSize)(r.nextDouble).toArray,
+        xVariance = Seq.fill(featureSize)(r.nextDouble).toArray, nPoints = 200,
+        seed, eps = 0.1, sparsity = 0.7), 2))
   }
 
   test("params") {
@@ -77,19 +91,19 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(lir.getFitIntercept)
     assert(lir.getStandardization)
     assert(lir.getSolver == "auto")
-    val model = lir.fit(dataset)
+    val model = lir.fit(datasetWithDenseFeature)
 
     // copied model must have the same parent.
     MLTestingUtils.checkCopy(model)
 
-    model.transform(dataset)
+    model.transform(datasetWithDenseFeature)
       .select("label", "prediction")
       .collect()
     assert(model.getFeaturesCol === "features")
     assert(model.getPredictionCol === "prediction")
     assert(model.intercept !== 0.0)
     assert(model.hasParent)
-    val numFeatures = dataset.select("features").first().getAs[Vector](0).size
+    val numFeatures = datasetWithDenseFeature.select("features").first().getAs[Vector](0).size
     assert(model.numFeatures === numFeatures)
   }
 
@@ -98,8 +112,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val trainer1 = new LinearRegression().setSolver(solver)
       // The result should be the same regardless of standardization without regularization
       val trainer2 = (new LinearRegression).setStandardization(false).setSolver(solver)
-      val model1 = trainer1.fit(dataset)
-      val model2 = trainer2.fit(dataset)
+      val model1 = trainer1.fit(datasetWithDenseFeature)
+      val model2 = trainer2.fit(datasetWithDenseFeature)
 
       /*
          Using the following R code to load the data and train the model using glmnet package.
@@ -124,7 +138,7 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       assert(model2.intercept ~== interceptR relTol 1E-3)
       assert(model2.weights ~= weightsR relTol 1E-3)
 
-      model1.transform(dataset).select("features", "prediction").collect().foreach {
+      model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
             features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
@@ -139,10 +153,10 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       // Without regularization the results should be the same
       val trainer2 = (new LinearRegression).setFitIntercept(false).setStandardization(false)
         .setSolver(solver)
-      val model1 = trainer1.fit(dataset)
-      val modelWithoutIntercept1 = trainer1.fit(datasetWithoutIntercept)
-      val model2 = trainer2.fit(dataset)
-      val modelWithoutIntercept2 = trainer2.fit(datasetWithoutIntercept)
+      val model1 = trainer1.fit(datasetWithDenseFeature)
+      val modelWithoutIntercept1 = trainer1.fit(datasetWithDenseFeatureWithoutIntercept)
+      val model2 = trainer2.fit(datasetWithDenseFeature)
+      val modelWithoutIntercept2 = trainer2.fit(datasetWithDenseFeatureWithoutIntercept)
 
       /*
          weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0,
@@ -186,19 +200,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
         .setSolver(solver).setStandardization(false)
 
-      var model1: LinearRegressionModel = null
-      var model2: LinearRegressionModel = null
-
       // Normal optimizer is not supported with only L1 regularization case.
       if (solver == "normal") {
         intercept[IllegalArgumentException] {
-            trainer1.fit(dataset)
-            trainer2.fit(dataset)
+            trainer1.fit(datasetWithDenseFeature)
+            trainer2.fit(datasetWithDenseFeature)
           }
       } else {
-        model1 = trainer1.fit(dataset)
-        model2 = trainer2.fit(dataset)
-
+        val model1 = trainer1.fit(datasetWithDenseFeature)
+        val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
            weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57))
@@ -230,11 +240,12 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(model2.intercept ~== interceptR2 relTol 1E-3)
         assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-        model1.transform(dataset).select("features", "prediction").collect().foreach {
-          case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 =
-              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-            assert(prediction1 ~== prediction2 relTol 1E-5)
+        model1.transform(datasetWithDenseFeature).select("features", "prediction")
+          .collect().foreach {
+            case Row(features: DenseVector, prediction1: Double) =>
+              val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
+                model1.intercept
+              assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
     }
@@ -247,18 +258,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val trainer2 = (new LinearRegression).setElasticNetParam(1.0).setRegParam(0.57)
         .setFitIntercept(false).setStandardization(false).setSolver(solver)
 
-      var model1: LinearRegressionModel = null
-      var model2: LinearRegressionModel = null
-
       // Normal optimizer is not supported with only L1 regularization case.
       if (solver == "normal") {
         intercept[IllegalArgumentException] {
-            trainer1.fit(dataset)
-            trainer2.fit(dataset)
+            trainer1.fit(datasetWithDenseFeature)
+            trainer2.fit(datasetWithDenseFeature)
           }
       } else {
-        model1 = trainer1.fit(dataset)
-        model2 = trainer2.fit(dataset)
+        val model1 = trainer1.fit(datasetWithDenseFeature)
+        val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
            weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
@@ -292,11 +300,12 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(model2.intercept ~== interceptR2 absTol 1E-3)
         assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-        model1.transform(dataset).select("features", "prediction").collect().foreach {
-          case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 =
-              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
-            assert(prediction1 ~== prediction2 relTol 1E-5)
+        model1.transform(datasetWithDenseFeature).select("features", "prediction")
+          .collect().foreach {
+            case Row(features: DenseVector, prediction1: Double) =>
+              val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
+                model1.intercept
+              assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
     }
@@ -308,8 +317,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         .setSolver(solver)
       val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
         .setStandardization(false).setSolver(solver)
-      val model1 = trainer1.fit(dataset)
-      val model2 = trainer2.fit(dataset)
+      val model1 = trainer1.fit(datasetWithDenseFeature)
+      val model2 = trainer2.fit(datasetWithDenseFeature)
 
       /*
          weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3))
@@ -342,7 +351,7 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       assert(model2.intercept ~== interceptR2 relTol 1E-3)
       assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-      model1.transform(dataset).select("features", "prediction").collect().foreach {
+      model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
             features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
@@ -357,8 +366,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         .setFitIntercept(false).setSolver(solver)
       val trainer2 = (new LinearRegression).setElasticNetParam(0.0).setRegParam(2.3)
         .setFitIntercept(false).setStandardization(false).setSolver(solver)
-      val model1 = trainer1.fit(dataset)
-      val model2 = trainer2.fit(dataset)
+      val model1 = trainer1.fit(datasetWithDenseFeature)
+      val model2 = trainer2.fit(datasetWithDenseFeature)
 
       /*
          weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
@@ -392,7 +401,7 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       assert(model2.intercept ~== interceptR2 absTol 1E-3)
       assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-      model1.transform(dataset).select("features", "prediction").collect().foreach {
+      model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
             features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
@@ -408,18 +417,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
         .setStandardization(false).setSolver(solver)
 
-      var model1: LinearRegressionModel = null
-      var model2: LinearRegressionModel = null
-
       // Normal optimizer is not supported with non-zero elasticnet parameter.
       if (solver == "normal") {
         intercept[IllegalArgumentException] {
-            trainer1.fit(dataset)
-            trainer2.fit(dataset)
+            trainer1.fit(datasetWithDenseFeature)
+            trainer2.fit(datasetWithDenseFeature)
           }
       } else {
-        model1 = trainer1.fit(dataset)
-        model2 = trainer2.fit(dataset)
+        val model1 = trainer1.fit(datasetWithDenseFeature)
+        val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
            weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6))
@@ -452,10 +458,11 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(model2.intercept ~== interceptR2 relTol 1E-3)
         assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-        model1.transform(dataset).select("features", "prediction").collect().foreach {
+        model1.transform(datasetWithDenseFeature).select("features", "prediction")
+          .collect().foreach {
           case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 =
-              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
+              model1.intercept
             assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -469,18 +476,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val trainer2 = (new LinearRegression).setElasticNetParam(0.3).setRegParam(1.6)
         .setFitIntercept(false).setStandardization(false).setSolver(solver)
 
-      var model1: LinearRegressionModel = null
-      var model2: LinearRegressionModel = null
-
       // Normal optimizer is not supported with non-zero elasticnet parameter.
       if (solver == "normal") {
         intercept[IllegalArgumentException] {
-            trainer1.fit(dataset)
-            trainer2.fit(dataset)
+            trainer1.fit(datasetWithDenseFeature)
+            trainer2.fit(datasetWithDenseFeature)
           }
       } else {
-        model1 = trainer1.fit(dataset)
-        model2 = trainer2.fit(dataset)
+        val model1 = trainer1.fit(datasetWithDenseFeature)
+        val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
            weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
@@ -514,10 +518,11 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(model2.intercept ~== interceptR2 absTol 1E-3)
         assert(model2.weights ~= weightsR2 relTol 1E-3)
 
-        model1.transform(dataset).select("features", "prediction").collect().foreach {
+        model1.transform(datasetWithDenseFeature).select("features", "prediction")
+          .collect().foreach {
           case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 =
-              features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
+              model1.intercept
             assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -527,27 +532,26 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("linear regression model training summary") {
     Seq("auto", "l-bfgs", "normal").foreach { solver =>
       val trainer = new LinearRegression().setSolver(solver)
-      val model = trainer.fit(dataset)
+      val model = trainer.fit(datasetWithDenseFeature)
       val trainerNoPredictionCol = trainer.setPredictionCol("")
-      val modelNoPredictionCol = trainerNoPredictionCol.fit(dataset)
-
+      val modelNoPredictionCol = trainerNoPredictionCol.fit(datasetWithDenseFeature)
 
       // Training results for the model should be available
       assert(model.hasSummary)
       assert(modelNoPredictionCol.hasSummary)
 
       // Schema should be a superset of the input dataset
-      assert((dataset.schema.fieldNames.toSet + "prediction").subsetOf(
+      assert((datasetWithDenseFeature.schema.fieldNames.toSet + "prediction").subsetOf(
         model.summary.predictions.schema.fieldNames.toSet))
       // Validate that we re-insert a prediction column for evaluation
       val modelNoPredictionColFieldNames
       = modelNoPredictionCol.summary.predictions.schema.fieldNames
-      assert((dataset.schema.fieldNames.toSet).subsetOf(
+      assert((datasetWithDenseFeature.schema.fieldNames.toSet).subsetOf(
         modelNoPredictionColFieldNames.toSet))
       assert(modelNoPredictionColFieldNames.exists(s => s.startsWith("prediction_")))
 
       // Residuals in [[LinearRegressionResults]] should equal those manually computed
-      val expectedResiduals = dataset.select("features", "label")
+      val expectedResiduals = datasetWithDenseFeature.select("features", "label")
         .map { case Row(features: DenseVector, label: Double) =>
         val prediction =
           features(0) * model.weights(0) + features(1) * model.weights(1) + model.intercept
@@ -585,6 +589,10 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
             .objectiveHistory
             .sliding(2)
             .forall(x => x(0) >= x(1)))
+      } else {
+        // To clalify that the normal solver is used here.
+        assert(model.summary.objectiveHistory.length == 1)
+        assert(model.summary.objectiveHistory(0) == 0.0)
       }
     }
   }
@@ -592,10 +600,10 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("linear regression model testset evaluation summary") {
     Seq("auto", "l-bfgs", "normal").foreach { solver =>
       val trainer = new LinearRegression().setSolver(solver)
-      val model = trainer.fit(dataset)
+      val model = trainer.fit(datasetWithDenseFeature)
 
       // Evaluating on training dataset should yield results summary equal to training summary
-      val testSummary = model.evaluate(dataset)
+      val testSummary = model.evaluate(datasetWithDenseFeature)
       assert(model.summary.meanSquaredError ~== testSummary.meanSquaredError relTol 1E-5)
       assert(model.summary.r2 ~== testSummary.r2 relTol 1E-5)
       model.summary.residuals.select("residuals").collect()
@@ -693,4 +701,18 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       assert(model4a0.weights ~== model4b.weights absTol 1E-3)
     }
   }
+
+  test("linear regression model with l-bfgs with big feature datasets") {
+    val trainer = new LinearRegression().setSolver("auto")
+    val model = trainer.fit(datasetWithSparseFeature)
+
+    // Training results for the model should be available
+    assert(model.hasSummary)
+    // When LBFGS is used as optimizer, objective history can be restored.
+    assert(
+      model.summary
+        .objectiveHistory
+        .sliding(2)
+        .forall(x => x(0) >= x(1)))
+  }
 }

From 59db9e9c382fab40aac0633f2c779bee8cf2025f Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Fri, 30 Oct 2015 18:17:35 +0800
Subject: [PATCH 415/896] [SPARK-11103][SQL] Filter applied on Merged Parquet
 shema with new column fail

When enabling mergedSchema and predicate filter, this fails since Parquet does not accept filters pushed down when the columns of the filters do not exist in the schema.
This is related with Parquet issue (https://issues.apache.org/jira/browse/PARQUET-389).

For now, it just simply disables predicate push down when using merged schema in this PR.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #9327 from HyukjinKwon/SPARK-11103.
---
 .../datasources/parquet/ParquetRelation.scala |  6 +++++-
 .../parquet/ParquetFilterSuite.scala          | 20 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 77d851ca486b..44649a68b3c9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -292,6 +292,10 @@ private[sql] class ParquetRelation(
     val assumeBinaryIsString = sqlContext.conf.isParquetBinaryAsString
     val assumeInt96IsTimestamp = sqlContext.conf.isParquetINT96AsTimestamp
 
+    // When merging schemas is enabled and the column of the given filter does not exist,
+    // Parquet emits an exception which is an issue of Parquet (PARQUET-389).
+    val safeParquetFilterPushDown = !shouldMergeSchemas && parquetFilterPushDown
+
     // Parquet row group size. We will use this value as the value for
     // mapreduce.input.fileinputformat.split.minsize and mapred.min.split.size if the value
     // of these flags are smaller than the parquet row group size.
@@ -305,7 +309,7 @@ private[sql] class ParquetRelation(
         dataSchema,
         parquetBlockSize,
         useMetadataCache,
-        parquetFilterPushDown,
+        safeParquetFilterPushDown,
         assumeBinaryIsString,
         assumeInt96IsTimestamp) _
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 13fdd555a4c7..b2101beb9222 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -316,4 +316,24 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
       }
     }
   }
+
+  test("SPARK-11103: Filter applied on merged Parquet schema with new column fails") {
+    import testImplicits._
+
+    withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true",
+      SQLConf.PARQUET_SCHEMA_MERGING_ENABLED.key -> "true") {
+      withTempPath { dir =>
+        var pathOne = s"${dir.getCanonicalPath}/table1"
+        (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(pathOne)
+        var pathTwo = s"${dir.getCanonicalPath}/table2"
+        (1 to 3).map(i => (i, i.toString)).toDF("c", "b").write.parquet(pathTwo)
+
+        // If the "c = 1" filter gets pushed down, this query will throw an exception which
+        // Parquet emits. This is a Parquet issue (PARQUET-389).
+        checkAnswer(
+          sqlContext.read.parquet(pathOne, pathTwo).filter("c = 1"),
+          (1 to 1).map(i => Row(i, i.toString, null)))
+      }
+    }
+  }
 }

From 14d08b99085d4e609aeae0cf54d4584e860eb552 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 30 Oct 2015 12:17:51 +0100
Subject: [PATCH 416/896] [SPARK-11393] [SQL] CoGroupedIterator should respect
 the fact that GroupedIterator.hasNext is not idempotent

When we cogroup 2 `GroupedIterator`s in `CoGroupedIterator`, if the right side is smaller, we will consume right data and keep the left data unchanged. Then we call `hasNext` which will call `left.hasNext`. This will make `GroupedIterator` generate an extra group as the previous one has not been comsumed yet.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9346 from cloud-fan/cogroup and squashes the following commits:

9be67c8 [Wenchen Fan] SPARK-11393
---
 .../sql/execution/CoGroupedIterator.scala     | 14 ++++++-----
 .../execution/CoGroupedIteratorSuite.scala    | 24 +++++++++++++++++++
 2 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
index ce5827855e4a..663bc904f39c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/CoGroupedIterator.scala
@@ -38,17 +38,19 @@ class CoGroupedIterator(
   private var currentLeftData: (InternalRow, Iterator[InternalRow]) = _
   private var currentRightData: (InternalRow, Iterator[InternalRow]) = _
 
-  override def hasNext: Boolean = left.hasNext || right.hasNext
-
-  override def next(): (InternalRow, Iterator[InternalRow], Iterator[InternalRow]) = {
-    if (currentLeftData.eq(null) && left.hasNext) {
+  override def hasNext: Boolean = {
+    if (currentLeftData == null && left.hasNext) {
       currentLeftData = left.next()
     }
-    if (currentRightData.eq(null) && right.hasNext) {
+    if (currentRightData == null && right.hasNext) {
       currentRightData = right.next()
     }
 
-    assert(currentLeftData.ne(null) || currentRightData.ne(null))
+    currentLeftData != null || currentRightData != null
+  }
+
+  override def next(): (InternalRow, Iterator[InternalRow], Iterator[InternalRow]) = {
+    assert(hasNext)
 
     if (currentLeftData.eq(null)) {
       // left is null, right is not null, consume the right data.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
index d1fe81947e9e..4ff96e6574ca 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/CoGroupedIteratorSuite.scala
@@ -48,4 +48,28 @@ class CoGroupedIteratorSuite extends SparkFunSuite with ExpressionEvalHelper {
       Nil
     )
   }
+
+  test("SPARK-11393: respect the fact that GroupedIterator.hasNext is not idempotent") {
+    val leftInput = Seq(create_row(2, "a")).iterator
+    val rightInput = Seq(create_row(1, 2L)).iterator
+    val leftGrouped = GroupedIterator(leftInput, Seq('i.int.at(0)), Seq('i.int, 's.string))
+    val rightGrouped = GroupedIterator(rightInput, Seq('i.int.at(0)), Seq('i.int, 'l.long))
+    val cogrouped = new CoGroupedIterator(leftGrouped, rightGrouped, Seq('i.int))
+
+    val result = cogrouped.map {
+      case (key, leftData, rightData) =>
+        assert(key.numFields == 1)
+        (key.getInt(0), leftData.toSeq, rightData.toSeq)
+    }.toSeq
+
+    assert(result ==
+      (1,
+        Seq.empty,
+        Seq(create_row(1, 2L))) ::
+      (2,
+        Seq(create_row(2, "a")),
+        Seq.empty) ::
+      Nil
+    )
+  }
 }

From 0451b00148a294c665146563242d2fe2de943a02 Mon Sep 17 00:00:00 2001
From: Iulian Dragos <jaguarul@gmail.com>
Date: Fri, 30 Oct 2015 16:51:32 +0000
Subject: [PATCH 417/896] [SPARK-10986][MESOS] Set the context class loader in
 the Mesos executor backend.

See [SPARK-10986](https://issues.apache.org/jira/browse/SPARK-10986) for details.

This fixes the `ClassNotFoundException` for Spark classes in the serializer.

I am not sure this is the right way to handle the class loader, but I couldn't find any documentation on how the context class loader is used and who relies on it. It seems at least the serializer uses it to instantiate classes during deserialization.

I am open to suggestions (I tried this fix on a real Mesos cluster and it *does* fix the issue).

tnachen andrewor14

Author: Iulian Dragos <jaguarul@gmail.com>

Closes #9282 from dragos/issue/mesos-classloader.
---
 .../org/apache/spark/executor/MesosExecutorBackend.scala     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/executor/MesosExecutorBackend.scala b/core/src/main/scala/org/apache/spark/executor/MesosExecutorBackend.scala
index 0474fd2ccc12..c9f18ebc7f0e 100644
--- a/core/src/main/scala/org/apache/spark/executor/MesosExecutorBackend.scala
+++ b/core/src/main/scala/org/apache/spark/executor/MesosExecutorBackend.scala
@@ -63,6 +63,11 @@ private[spark] class MesosExecutorBackend
 
     logInfo(s"Registered with Mesos as executor ID $executorId with $cpusPerTask cpus")
     this.driver = driver
+    // Set a context class loader to be picked up by the serializer. Without this call
+    // the serializer would default to the null class loader, and fail to find Spark classes
+    // See SPARK-10986.
+    Thread.currentThread().setContextClassLoader(this.getClass.getClassLoader)
+
     val properties = Utils.deserialize[Array[(String, String)]](executorInfo.getData.toByteArray) ++
       Seq[(String, String)](("spark.app.id", frameworkInfo.getId.getValue))
     val conf = new SparkConf(loadDefaults = true).setAll(properties)

From fab710a9171932f01ac81d100db8523dbd314925 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Fri, 30 Oct 2015 10:51:11 -0700
Subject: [PATCH 418/896] [SPARK-11414][SPARKR] Forgot to update usage of
 'spark.sparkr.r.command' in RRDD in the PR for SPARK-10971.

Author: Sun Rui <rui.sun@intel.com>

Closes #9368 from sun-rui/SPARK-11414.
---
 core/src/main/scala/org/apache/spark/api/r/RRDD.scala | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/api/r/RRDD.scala b/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
index 9d5bbb5d609f..6b418e908cb5 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
@@ -392,7 +392,12 @@ private[r] object RRDD {
   }
 
   private def createRProcess(port: Int, script: String): BufferedStreamThread = {
-    val rCommand = SparkEnv.get.conf.get("spark.sparkr.r.command", "Rscript")
+    // "spark.sparkr.r.command" is deprecated and replaced by "spark.r.command",
+    // but kept here for backward compatibility.
+    val sparkConf = SparkEnv.get.conf
+    var rCommand = sparkConf.get("spark.sparkr.r.command", "Rscript")
+    rCommand = sparkConf.get("spark.r.command", rCommand)
+
     val rOptions = "--vanilla"
     val rLibDir = RUtils.sparkRPackagePath(isDriver = false)
     val rExecScript = rLibDir + "/SparkR/worker/" + script

From 40c77fb23a1ee0a4e69d735ee6247f83b7e13b92 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Fri, 30 Oct 2015 10:56:06 -0700
Subject: [PATCH 419/896] [SPARK-11210][SPARKR] Add window functions into
 SparkR [step 2].

Author: Sun Rui <rui.sun@intel.com>

Closes #9196 from sun-rui/SPARK-11210.
---
 R/pkg/NAMESPACE                  |  4 ++
 R/pkg/R/functions.R              | 92 ++++++++++++++++++++++++++++++++
 R/pkg/R/generics.R               | 16 ++++++
 R/pkg/inst/tests/test_sparkSQL.R |  5 ++
 4 files changed, 117 insertions(+)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index b73bed312824..cd9537a2655f 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -126,6 +126,7 @@ exportMethods("%in%",
               "datediff",
               "dayofmonth",
               "dayofyear",
+              "denseRank",
               "desc",
               "endsWith",
               "exp",
@@ -182,16 +183,19 @@ exportMethods("%in%",
               "next_day",
               "ntile",
               "otherwise",
+              "percentRank",
               "pmod",
               "quarter",
               "rand",
               "randn",
+              "rank",
               "regexp_extract",
               "regexp_replace",
               "reverse",
               "rint",
               "rlike",
               "round",
+              "rowNumber",
               "rpad",
               "rtrim",
               "second",
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index 366290fe6627..d7fd27927913 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -2038,6 +2038,28 @@ setMethod("cumeDist",
             column(jc)
           })
 
+#' denseRank
+#' 
+#' Window function: returns the rank of rows within a window partition, without any gaps.
+#' The difference between rank and denseRank is that denseRank leaves no gaps in ranking
+#' sequence when there are ties. That is, if you were ranking a competition using denseRank
+#' and had three people tie for second place, you would say that all three were in second
+#' place and that the next person came in third.
+#' 
+#' This is equivalent to the DENSE_RANK function in SQL.
+#'
+#' @rdname denseRank
+#' @name denseRank
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{denseRank()}
+setMethod("denseRank",
+          signature(x = "missing"),
+          function() {
+            jc <- callJStatic("org.apache.spark.sql.functions", "denseRank")
+            column(jc)
+          })
+
 #' lag
 #'
 #' Window function: returns the value that is `offset` rows before the current row, and
@@ -2111,3 +2133,73 @@ setMethod("ntile",
             jc <- callJStatic("org.apache.spark.sql.functions", "ntile", as.integer(x))
             column(jc)
           })
+
+#' percentRank
+#'
+#' Window function: returns the relative rank (i.e. percentile) of rows within a window partition.
+#' 
+#' This is computed by:
+#' 
+#'   (rank of row in its partition - 1) / (number of rows in the partition - 1)
+#'
+#' This is equivalent to the PERCENT_RANK function in SQL.
+#'
+#' @rdname percentRank
+#' @name percentRank
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{percentRank()}
+setMethod("percentRank",
+          signature(x = "missing"),
+          function() {
+            jc <- callJStatic("org.apache.spark.sql.functions", "percentRank")
+            column(jc)
+          })
+
+#' rank
+#'
+#' Window function: returns the rank of rows within a window partition.
+#' 
+#' The difference between rank and denseRank is that denseRank leaves no gaps in ranking
+#' sequence when there are ties. That is, if you were ranking a competition using denseRank
+#' and had three people tie for second place, you would say that all three were in second
+#' place and that the next person came in third.
+#' 
+#' This is equivalent to the RANK function in SQL.
+#'
+#' @rdname rank
+#' @name rank
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{rank()}
+setMethod("rank",
+          signature(x = "missing"),
+          function() {
+            jc <- callJStatic("org.apache.spark.sql.functions", "rank")
+            column(jc)
+          })
+
+# Expose rank() in the R base package
+setMethod("rank",
+          signature(x = "ANY"),
+          function(x, ...) {
+            base::rank(x, ...)
+          })
+
+#' rowNumber
+#'
+#' Window function: returns a sequential number starting at 1 within a window partition.
+#' 
+#' This is equivalent to the ROW_NUMBER function in SQL.
+#'
+#' @rdname rowNumber
+#' @name rowNumber
+#' @family window_funcs
+#' @export
+#' @examples \dontrun{rowNumber()}
+setMethod("rowNumber",
+          signature(x = "missing"),
+          function() {
+            jc <- callJStatic("org.apache.spark.sql.functions", "rowNumber")
+            column(jc)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index c11c3c8d3e15..0b35340e48e4 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -742,6 +742,10 @@ setGeneric("dayofmonth", function(x) { standardGeneric("dayofmonth") })
 #' @export
 setGeneric("dayofyear", function(x) { standardGeneric("dayofyear") })
 
+#' @rdname denseRank
+#' @export
+setGeneric("denseRank", function(x) { standardGeneric("denseRank") })
+
 #' @rdname explode
 #' @export
 setGeneric("explode", function(x) { standardGeneric("explode") })
@@ -878,6 +882,10 @@ setGeneric("ntile", function(x) { standardGeneric("ntile") })
 #' @export
 setGeneric("n_distinct", function(x, ...) { standardGeneric("n_distinct") })
 
+#' @rdname percentRank
+#' @export
+setGeneric("percentRank", function(x) { standardGeneric("percentRank") })
+
 #' @rdname pmod
 #' @export
 setGeneric("pmod", function(y, x) { standardGeneric("pmod") })
@@ -894,6 +902,10 @@ setGeneric("rand", function(seed) { standardGeneric("rand") })
 #' @export
 setGeneric("randn", function(seed) { standardGeneric("randn") })
 
+#' @rdname rank
+#' @export
+setGeneric("rank", function(x, ...) { standardGeneric("rank") })
+
 #' @rdname regexp_extract
 #' @export
 setGeneric("regexp_extract", function(x, pattern, idx) { standardGeneric("regexp_extract") })
@@ -911,6 +923,10 @@ setGeneric("reverse", function(x) { standardGeneric("reverse") })
 #' @export
 setGeneric("rint", function(x, ...) { standardGeneric("rint") })
 
+#' @rdname rowNumber
+#' @export
+setGeneric("rowNumber", function(x) { standardGeneric("rowNumber") })
+
 #' @rdname rpad
 #' @export
 setGeneric("rpad", function(x, len, pad) { standardGeneric("rpad") })
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index e1d4499925fe..b4a4d03b2643 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -831,6 +831,11 @@ test_that("column functions", {
   c11 <- to_date(c) + trim(c) + unbase64(c) + unhex(c) + upper(c)
   c12 <- lead("col", 1) + lead(c, 1) + lag("col", 1) + lag(c, 1)
   c13 <- cumeDist() + ntile(1)
+  c14 <- denseRank() + percentRank() + rank() + rowNumber()
+
+  # Test if base::rank() is exposed
+  expect_equal(class(rank())[[1]], "Column")
+  expect_equal(rank(1:3), as.numeric(c(1:3)))
 
   df <- jsonFile(sqlContext, jsonPath)
   df2 <- select(df, between(df$age, c(20, 30)), between(df$age, c(10, 20)))

From 729f983e66cf65da2e8f48c463ccde2b355240c4 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Fri, 30 Oct 2015 18:50:12 +0000
Subject: [PATCH 420/896] =?UTF-8?q?[SPARK-11342][TESTS]=20Allow=20to=20set?=
 =?UTF-8?q?=20hadoop=20profile=20when=20running=20dev/ru=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…n_tests

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9295 from zjffdu/SPARK-11342.
---
 dev/run-tests.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dev/run-tests.py b/dev/run-tests.py
index 6b4b71073453..9e1abb069719 100755
--- a/dev/run-tests.py
+++ b/dev/run-tests.py
@@ -486,7 +486,7 @@ def main():
     else:
         # else we're running locally and can use local settings
         build_tool = "sbt"
-        hadoop_version = "hadoop2.3"
+        hadoop_version = os.environ.get("HADOOP_PROFILE", "hadoop2.3")
         test_env = "local"
 
     print("[info] Using build tool", build_tool, "with Hadoop profile", hadoop_version,

From bb5a2af034196620d869fc9b1a400e014e718b8c Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Fri, 30 Oct 2015 13:51:32 -0700
Subject: [PATCH 421/896] [SPARK-11340][SPARKR] Support setting driver
 properties when starting Spark from R programmatically or from RStudio

Mapping spark.driver.memory from sparkEnvir to spark-submit commandline arguments.

shivaram suggested that we possibly add other spark.driver.* properties - do we want to add all of those? I thought those could be set in SparkConf?
sun-rui

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9290 from felixcheung/rdrivermem.
---
 R/pkg/R/sparkR.R                | 45 +++++++++++++++++++++++++++++----
 R/pkg/inst/tests/test_context.R | 27 ++++++++++++++++++++
 docs/sparkr.md                  | 28 ++++++++++++++------
 3 files changed, 87 insertions(+), 13 deletions(-)

diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index 043b0057bd04..004d08e74e1c 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -77,7 +77,9 @@ sparkR.stop <- function() {
 
 #' Initialize a new Spark Context.
 #'
-#' This function initializes a new SparkContext.
+#' This function initializes a new SparkContext. For details on how to initialize
+#' and use SparkR, refer to SparkR programming guide at 
+#' \url{http://spark.apache.org/docs/latest/sparkr.html#starting-up-sparkcontext-sqlcontext}.
 #'
 #' @param master The Spark master URL.
 #' @param appName Application name to register with cluster manager
@@ -93,7 +95,7 @@ sparkR.stop <- function() {
 #' sc <- sparkR.init("local[2]", "SparkR", "/home/spark",
 #'                  list(spark.executor.memory="1g"))
 #' sc <- sparkR.init("yarn-client", "SparkR", "/home/spark",
-#'                  list(spark.executor.memory="1g"),
+#'                  list(spark.executor.memory="4g"),
 #'                  list(LD_LIBRARY_PATH="/directory of JVM libraries (libjvm.so) on workers/"),
 #'                  c("jarfile1.jar","jarfile2.jar"))
 #'}
@@ -123,16 +125,21 @@ sparkR.init <- function(
     uriSep <- "////"
   }
 
+  sparkEnvirMap <- convertNamedListToEnv(sparkEnvir)
+
   existingPort <- Sys.getenv("EXISTING_SPARKR_BACKEND_PORT", "")
   if (existingPort != "") {
     backendPort <- existingPort
   } else {
     path <- tempfile(pattern = "backend_port")
+    submitOps <- getClientModeSparkSubmitOpts(
+        Sys.getenv("SPARKR_SUBMIT_ARGS", "sparkr-shell"),
+        sparkEnvirMap)
     launchBackend(
         args = path,
         sparkHome = sparkHome,
         jars = jars,
-        sparkSubmitOpts = Sys.getenv("SPARKR_SUBMIT_ARGS", "sparkr-shell"),
+        sparkSubmitOpts = submitOps,
         packages = sparkPackages)
     # wait atmost 100 seconds for JVM to launch
     wait <- 0.1
@@ -171,8 +178,6 @@ sparkR.init <- function(
     sparkHome <- suppressWarnings(normalizePath(sparkHome))
   }
 
-  sparkEnvirMap <- convertNamedListToEnv(sparkEnvir)
-
   sparkExecutorEnvMap <- convertNamedListToEnv(sparkExecutorEnv)
   if(is.null(sparkExecutorEnvMap$LD_LIBRARY_PATH)) {
     sparkExecutorEnvMap[["LD_LIBRARY_PATH"]] <-
@@ -320,3 +325,33 @@ clearJobGroup <- function(sc) {
 cancelJobGroup <- function(sc, groupId) {
   callJMethod(sc, "cancelJobGroup", groupId)
 }
+
+sparkConfToSubmitOps <- new.env()
+sparkConfToSubmitOps[["spark.driver.memory"]]           <- "--driver-memory"
+sparkConfToSubmitOps[["spark.driver.extraClassPath"]]   <- "--driver-class-path"
+sparkConfToSubmitOps[["spark.driver.extraJavaOptions"]] <- "--driver-java-options"
+sparkConfToSubmitOps[["spark.driver.extraLibraryPath"]] <- "--driver-library-path"
+
+# Utility function that returns Spark Submit arguments as a string
+#
+# A few Spark Application and Runtime environment properties cannot take effect after driver
+# JVM has started, as documented in:
+# http://spark.apache.org/docs/latest/configuration.html#application-properties
+# When starting SparkR without using spark-submit, for example, from Rstudio, add them to
+# spark-submit commandline if not already set in SPARKR_SUBMIT_ARGS so that they can be effective.
+getClientModeSparkSubmitOpts <- function(submitOps, sparkEnvirMap) {
+  envirToOps <- lapply(ls(sparkConfToSubmitOps), function(conf) {
+    opsValue <- sparkEnvirMap[[conf]]
+    # process only if --option is not already specified
+    if (!is.null(opsValue) &&
+        nchar(opsValue) > 1 &&
+        !grepl(sparkConfToSubmitOps[[conf]], submitOps)) {
+      # put "" around value in case it has spaces
+      paste0(sparkConfToSubmitOps[[conf]], " \"", opsValue, "\" ")
+    } else {
+      ""
+    }
+  })
+  # --option must be before the application class "sparkr-shell" in submitOps
+  paste0(paste0(envirToOps, collapse = ""), submitOps)
+}
diff --git a/R/pkg/inst/tests/test_context.R b/R/pkg/inst/tests/test_context.R
index e99815ed1562..80c1b89a4c62 100644
--- a/R/pkg/inst/tests/test_context.R
+++ b/R/pkg/inst/tests/test_context.R
@@ -65,3 +65,30 @@ test_that("job group functions can be called", {
   cancelJobGroup(sc, "groupId")
   clearJobGroup(sc)
 })
+
+test_that("getClientModeSparkSubmitOpts() returns spark-submit args from whitelist", {
+  e <- new.env()
+  e[["spark.driver.memory"]] <- "512m"
+  ops <- getClientModeSparkSubmitOpts("sparkrmain", e)
+  expect_equal("--driver-memory \"512m\" sparkrmain", ops)
+
+  e[["spark.driver.memory"]] <- "5g"
+  e[["spark.driver.extraClassPath"]] <- "/opt/class_path" # nolint
+  e[["spark.driver.extraJavaOptions"]] <- "-XX:+UseCompressedOops -XX:+UseCompressedStrings"
+  e[["spark.driver.extraLibraryPath"]] <- "/usr/local/hadoop/lib" # nolint
+  e[["random"]] <- "skipthis"
+  ops2 <- getClientModeSparkSubmitOpts("sparkr-shell", e)
+  # nolint start
+  expect_equal(ops2, paste0("--driver-class-path \"/opt/class_path\" --driver-java-options \"",
+                      "-XX:+UseCompressedOops -XX:+UseCompressedStrings\" --driver-library-path \"",
+                      "/usr/local/hadoop/lib\" --driver-memory \"5g\" sparkr-shell"))
+  # nolint end
+
+  e[["spark.driver.extraClassPath"]] <- "/" # too short
+  ops3 <- getClientModeSparkSubmitOpts("--driver-memory 4g sparkr-shell2", e)
+  # nolint start
+  expect_equal(ops3, paste0("--driver-java-options \"-XX:+UseCompressedOops ",
+                      "-XX:+UseCompressedStrings\" --driver-library-path \"/usr/local/hadoop/lib\"",
+                      " --driver-memory 4g sparkr-shell2"))
+  # nolint end
+})
diff --git a/docs/sparkr.md b/docs/sparkr.md
index 7139d16b4a06..497a276679f3 100644
--- a/docs/sparkr.md
+++ b/docs/sparkr.md
@@ -29,7 +29,7 @@ All of the examples on this page use sample data included in R or the Spark dist
 The entry point into SparkR is the `SparkContext` which connects your R program to a Spark cluster.
 You can create a `SparkContext` using `sparkR.init` and pass in options such as the application name
 , any spark packages depended on, etc. Further, to work with DataFrames we will need a `SQLContext`,
-which can be created from the  SparkContext. If you are working from the SparkR shell, the
+which can be created from the  SparkContext. If you are working from the `sparkR` shell, the
 `SQLContext` and `SparkContext` should already be created for you.
 
 {% highlight r %}
@@ -37,17 +37,29 @@ sc <- sparkR.init()
 sqlContext <- sparkRSQL.init(sc)
 {% endhighlight %}
 
+In the event you are creating `SparkContext` instead of using `sparkR` shell or `spark-submit`, you 
+could also specify certain Spark driver properties. Normally these
+[Application properties](configuration.html#application-properties) and
+[Runtime Environment](configuration.html#runtime-environment) cannot be set programmatically, as the
+driver JVM process would have been started, in this case SparkR takes care of this for you. To set
+them, pass them as you would other configuration properties in the `sparkEnvir` argument to
+`sparkR.init()`.
+
+{% highlight r %}
+sc <- sparkR.init("local[*]", "SparkR", "/home/spark", list(spark.driver.memory="2g"))
+{% endhighlight %}
+
 </div>
 
 ## Creating DataFrames
 With a `SQLContext`, applications can create `DataFrame`s from a local R data frame, from a [Hive table](sql-programming-guide.html#hive-tables), or from other [data sources](sql-programming-guide.html#data-sources).
 
 ### From local data frames
-The simplest way to create a data frame is to convert a local R data frame into a SparkR DataFrame. Specifically we can use `createDataFrame` and pass in the local R data frame to create a SparkR DataFrame. As an example, the following creates a `DataFrame` based using the `faithful` dataset from R. 
+The simplest way to create a data frame is to convert a local R data frame into a SparkR DataFrame. Specifically we can use `createDataFrame` and pass in the local R data frame to create a SparkR DataFrame. As an example, the following creates a `DataFrame` based using the `faithful` dataset from R.
 
 <div data-lang="r"  markdown="1">
 {% highlight r %}
-df <- createDataFrame(sqlContext, faithful) 
+df <- createDataFrame(sqlContext, faithful)
 
 # Displays the content of the DataFrame to stdout
 head(df)
@@ -96,7 +108,7 @@ printSchema(people)
 </div>
 
 The data sources API can also be used to save out DataFrames into multiple file formats. For example we can save the DataFrame from the previous example
-to a Parquet file using `write.df` 
+to a Parquet file using `write.df`
 
 <div data-lang="r"  markdown="1">
 {% highlight r %}
@@ -139,7 +151,7 @@ Here we include some basic examples and a complete list can be found in the [API
 <div data-lang="r"  markdown="1">
 {% highlight r %}
 # Create the DataFrame
-df <- createDataFrame(sqlContext, faithful) 
+df <- createDataFrame(sqlContext, faithful)
 
 # Get basic information about the DataFrame
 df
@@ -152,7 +164,7 @@ head(select(df, df$eruptions))
 ##2     1.800
 ##3     3.333
 
-# You can also pass in column name as strings 
+# You can also pass in column name as strings
 head(select(df, "eruptions"))
 
 # Filter the DataFrame to only retain rows with wait times shorter than 50 mins
@@ -166,7 +178,7 @@ head(filter(df, df$waiting < 50))
 
 </div>
 
-### Grouping, Aggregation 
+### Grouping, Aggregation
 
 SparkR data frames support a number of commonly used functions to aggregate data after grouping. For example we can compute a histogram of the `waiting` time in the `faithful` dataset as shown below
 
@@ -194,7 +206,7 @@ head(arrange(waiting_counts, desc(waiting_counts$count)))
 
 ### Operating on Columns
 
-SparkR also provides a number of functions that can directly applied to columns for data processing and during aggregation. The example below shows the use of basic arithmetic functions. 
+SparkR also provides a number of functions that can directly applied to columns for data processing and during aggregation. The example below shows the use of basic arithmetic functions.
 
 <div data-lang="r"  markdown="1">
 {% highlight r %}

From 45029bfdea42eb8964f2ba697859687393d2a558 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Fri, 30 Oct 2015 15:47:40 -0700
Subject: [PATCH 422/896] [SPARK-11423] remove MapPartitionsWithPreparationRDD

Since we do not need to preserve a page before calling compute(), MapPartitionsWithPreparationRDD is not needed anymore.

This PR basically revert #8543, #8511, #8038, #8011

Author: Davies Liu <davies@databricks.com>

Closes #9381 from davies/remove_prepare2.
---
 .../rdd/MapPartitionsWithPreparationRDD.scala | 66 ----------------
 .../spark/rdd/ZippedPartitionsRDD.scala       | 13 ---
 ...MapPartitionsWithPreparationRDDSuite.scala | 66 ----------------
 project/MimaExcludes.scala                    |  6 +-
 .../UnsafeFixedWidthAggregationMap.java       |  9 +--
 .../aggregate/TungstenAggregate.scala         | 79 +++++++------------
 .../TungstenAggregationIterator.scala         | 78 ++++++++----------
 .../org/apache/spark/sql/execution/sort.scala | 28 ++-----
 8 files changed, 75 insertions(+), 270 deletions(-)
 delete mode 100644 core/src/main/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDD.scala
 delete mode 100644 core/src/test/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDDSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDD.scala b/core/src/main/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDD.scala
deleted file mode 100644
index 417ff5278db2..000000000000
--- a/core/src/main/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDD.scala
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rdd
-
-import scala.collection.mutable.ArrayBuffer
-import scala.reflect.ClassTag
-
-import org.apache.spark.{Partition, Partitioner, TaskContext}
-
-/**
- * An RDD that applies a user provided function to every partition of the parent RDD, and
- * additionally allows the user to prepare each partition before computing the parent partition.
- */
-private[spark] class MapPartitionsWithPreparationRDD[U: ClassTag, T: ClassTag, M: ClassTag](
-    prev: RDD[T],
-    preparePartition: () => M,
-    executePartition: (TaskContext, Int, M, Iterator[T]) => Iterator[U],
-    preservesPartitioning: Boolean = false)
-  extends RDD[U](prev) {
-
-  override val partitioner: Option[Partitioner] = {
-    if (preservesPartitioning) firstParent[T].partitioner else None
-  }
-
-  override def getPartitions: Array[Partition] = firstParent[T].partitions
-
-  // In certain join operations, prepare can be called on the same partition multiple times.
-  // In this case, we need to ensure that each call to compute gets a separate prepare argument.
-  private[this] val preparedArguments: ArrayBuffer[M] = new ArrayBuffer[M]
-
-  /**
-   * Prepare a partition for a single call to compute.
-   */
-  def prepare(): Unit = {
-    preparedArguments += preparePartition()
-  }
-
-  /**
-   * Prepare a partition before computing it from its parent.
-   */
-  override def compute(partition: Partition, context: TaskContext): Iterator[U] = {
-    val prepared =
-      if (preparedArguments.isEmpty) {
-        preparePartition()
-      } else {
-        preparedArguments.remove(0)
-      }
-    val parentIterator = firstParent[T].iterator(partition, context)
-    executePartition(context, partition.index, prepared, parentIterator)
-  }
-}
diff --git a/core/src/main/scala/org/apache/spark/rdd/ZippedPartitionsRDD.scala b/core/src/main/scala/org/apache/spark/rdd/ZippedPartitionsRDD.scala
index 70bf04de6400..4333a679c8aa 100644
--- a/core/src/main/scala/org/apache/spark/rdd/ZippedPartitionsRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/ZippedPartitionsRDD.scala
@@ -73,16 +73,6 @@ private[spark] abstract class ZippedPartitionsBaseRDD[V: ClassTag](
     super.clearDependencies()
     rdds = null
   }
-
-  /**
-   * Call the prepare method of every parent that has one.
-   * This is needed for reserving execution memory in advance.
-   */
-  protected def tryPrepareParents(): Unit = {
-    rdds.collect {
-      case rdd: MapPartitionsWithPreparationRDD[_, _, _] => rdd.prepare()
-    }
-  }
 }
 
 private[spark] class ZippedPartitionsRDD2[A: ClassTag, B: ClassTag, V: ClassTag](
@@ -94,7 +84,6 @@ private[spark] class ZippedPartitionsRDD2[A: ClassTag, B: ClassTag, V: ClassTag]
   extends ZippedPartitionsBaseRDD[V](sc, List(rdd1, rdd2), preservesPartitioning) {
 
   override def compute(s: Partition, context: TaskContext): Iterator[V] = {
-    tryPrepareParents()
     val partitions = s.asInstanceOf[ZippedPartitionsPartition].partitions
     f(rdd1.iterator(partitions(0), context), rdd2.iterator(partitions(1), context))
   }
@@ -118,7 +107,6 @@ private[spark] class ZippedPartitionsRDD3
   extends ZippedPartitionsBaseRDD[V](sc, List(rdd1, rdd2, rdd3), preservesPartitioning) {
 
   override def compute(s: Partition, context: TaskContext): Iterator[V] = {
-    tryPrepareParents()
     val partitions = s.asInstanceOf[ZippedPartitionsPartition].partitions
     f(rdd1.iterator(partitions(0), context),
       rdd2.iterator(partitions(1), context),
@@ -146,7 +134,6 @@ private[spark] class ZippedPartitionsRDD4
   extends ZippedPartitionsBaseRDD[V](sc, List(rdd1, rdd2, rdd3, rdd4), preservesPartitioning) {
 
   override def compute(s: Partition, context: TaskContext): Iterator[V] = {
-    tryPrepareParents()
     val partitions = s.asInstanceOf[ZippedPartitionsPartition].partitions
     f(rdd1.iterator(partitions(0), context),
       rdd2.iterator(partitions(1), context),
diff --git a/core/src/test/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDDSuite.scala b/core/src/test/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDDSuite.scala
deleted file mode 100644
index e281e817e493..000000000000
--- a/core/src/test/scala/org/apache/spark/rdd/MapPartitionsWithPreparationRDDSuite.scala
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.rdd
-
-import scala.collection.mutable
-
-import org.apache.spark.{LocalSparkContext, SparkContext, SparkFunSuite, TaskContext}
-
-class MapPartitionsWithPreparationRDDSuite extends SparkFunSuite with LocalSparkContext {
-
-  test("prepare called before parent partition is computed") {
-    sc = new SparkContext("local", "test")
-
-    // Have the parent partition push a number to the list
-    val parent = sc.parallelize(1 to 100, 1).mapPartitions { iter =>
-      TestObject.things.append(20)
-      iter
-    }
-
-    // Push a different number during the prepare phase
-    val preparePartition = () => { TestObject.things.append(10) }
-
-    // Push yet another number during the execution phase
-    val executePartition = (
-        taskContext: TaskContext,
-        partitionIndex: Int,
-        notUsed: Unit,
-        parentIterator: Iterator[Int]) => {
-      TestObject.things.append(30)
-      TestObject.things.iterator
-    }
-
-    // Verify that the numbers are pushed in the order expected
-    val rdd = new MapPartitionsWithPreparationRDD[Int, Int, Unit](
-      parent, preparePartition, executePartition)
-    val result = rdd.collect()
-    assert(result === Array(10, 20, 30))
-
-    TestObject.things.clear()
-    // Zip two of these RDDs, both should be prepared before the parent is executed
-    val rdd2 = new MapPartitionsWithPreparationRDD[Int, Int, Unit](
-      parent, preparePartition, executePartition)
-    val result2 = rdd.zipPartitions(rdd2)((a, b) => a).collect()
-    assert(result2 === Array(10, 10, 20, 30, 20, 30))
-  }
-
-}
-
-private object TestObject {
-  val things = new mutable.ListBuffer[Int]
-}
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index b5e661d3ecfa..8282f7ea6240 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -107,7 +107,11 @@ object MimaExcludes {
           "org.apache.spark.sql.SQLContext.createSession")
       ) ++ Seq(
         ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.SparkContext.preferredNodeLocationData_=")
+          "org.apache.spark.SparkContext.preferredNodeLocationData_="),
+        ProblemFilters.exclude[MissingClassProblem](
+          "org.apache.spark.rdd.MapPartitionsWithPreparationRDD"),
+        ProblemFilters.exclude[MissingClassProblem](
+          "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
index 889f97003450..d4b6d75b4d98 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
@@ -19,9 +19,8 @@
 
 import java.io.IOException;
 
-import com.google.common.annotations.VisibleForTesting;
-
 import org.apache.spark.SparkEnv;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.sql.catalyst.InternalRow;
 import org.apache.spark.sql.catalyst.expressions.UnsafeProjection;
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
@@ -31,7 +30,6 @@
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.map.BytesToBytesMap;
 import org.apache.spark.unsafe.memory.MemoryLocation;
-import org.apache.spark.memory.TaskMemoryManager;
 
 /**
  * Unsafe-based HashMap for performing aggregations where the aggregated values are fixed-width.
@@ -218,11 +216,6 @@ public long getPeakMemoryUsedBytes() {
     return map.getPeakMemoryUsedBytes();
   }
 
-  @VisibleForTesting
-  public int getNumDataPages() {
-    return map.getNumDataPages();
-  }
-
   /**
    * Free the memory associated with this map. This is idempotent and can be called multiple times.
    */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index 0d3a4b36c161..15616915f736 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -17,15 +17,14 @@
 
 package org.apache.spark.sql.execution.aggregate
 
-import org.apache.spark.TaskContext
-import org.apache.spark.rdd.{MapPartitionsWithPreparationRDD, RDD}
+import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
-import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression2
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression2
 import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.{UnsafeFixedWidthAggregationMap, UnaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
+import org.apache.spark.sql.execution.{SparkPlan, UnaryNode, UnsafeFixedWidthAggregationMap}
 import org.apache.spark.sql.types.StructType
 
 case class TungstenAggregate(
@@ -84,59 +83,39 @@ case class TungstenAggregate(
     val dataSize = longMetric("dataSize")
     val spillSize = longMetric("spillSize")
 
-    /**
-     * Set up the underlying unsafe data structures used before computing the parent partition.
-     * This makes sure our iterator is not starved by other operators in the same task.
-     */
-    def preparePartition(): TungstenAggregationIterator = {
-      new TungstenAggregationIterator(
-        groupingExpressions,
-        nonCompleteAggregateExpressions,
-        nonCompleteAggregateAttributes,
-        completeAggregateExpressions,
-        completeAggregateAttributes,
-        initialInputBufferOffset,
-        resultExpressions,
-        newMutableProjection,
-        child.output,
-        testFallbackStartsAt,
-        numInputRows,
-        numOutputRows,
-        dataSize,
-        spillSize)
-    }
+    child.execute().mapPartitions { iter =>
 
-    /** Compute a partition using the iterator already set up previously. */
-    def executePartition(
-        context: TaskContext,
-        partitionIndex: Int,
-        aggregationIterator: TungstenAggregationIterator,
-        parentIterator: Iterator[InternalRow]): Iterator[UnsafeRow] = {
-      val hasInput = parentIterator.hasNext
-      if (!hasInput) {
-        // We're not using the underlying map, so we just can free it here
-        aggregationIterator.free()
-        if (groupingExpressions.isEmpty) {
+      val hasInput = iter.hasNext
+      if (!hasInput && groupingExpressions.nonEmpty) {
+        // This is a grouped aggregate and the input iterator is empty,
+        // so return an empty iterator.
+        Iterator.empty
+      } else {
+        val aggregationIterator =
+          new TungstenAggregationIterator(
+            groupingExpressions,
+            nonCompleteAggregateExpressions,
+            nonCompleteAggregateAttributes,
+            completeAggregateExpressions,
+            completeAggregateAttributes,
+            initialInputBufferOffset,
+            resultExpressions,
+            newMutableProjection,
+            child.output,
+            iter,
+            testFallbackStartsAt,
+            numInputRows,
+            numOutputRows,
+            dataSize,
+            spillSize)
+        if (!hasInput && groupingExpressions.isEmpty) {
           numOutputRows += 1
           Iterator.single[UnsafeRow](aggregationIterator.outputForEmptyGroupingKeyWithoutInput())
         } else {
-          // This is a grouped aggregate and the input iterator is empty,
-          // so return an empty iterator.
-          Iterator.empty
+          aggregationIterator
         }
-      } else {
-        aggregationIterator.start(parentIterator)
-        aggregationIterator
       }
     }
-
-    // Note: we need to set up the iterator in each partition before computing the
-    // parent partition, so we cannot simply use `mapPartitions` here (SPARK-9747).
-    val resultRdd = {
-      new MapPartitionsWithPreparationRDD[UnsafeRow, InternalRow, TungstenAggregationIterator](
-        child.execute(), preparePartition, executePartition, preservesPartitioning = true)
-    }
-    resultRdd.asInstanceOf[RDD[InternalRow]]
   }
 
   override def simpleString: String = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index fb2fc98e34fb..713a4db0cd59 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -74,6 +74,8 @@ import org.apache.spark.sql.types.StructType
  *   the function used to create mutable projections.
  * @param originalInputAttributes
  *   attributes of representing input rows from `inputIter`.
+ * @param inputIter
+ *   the iterator containing input [[UnsafeRow]]s.
  */
 class TungstenAggregationIterator(
     groupingExpressions: Seq[NamedExpression],
@@ -85,6 +87,7 @@ class TungstenAggregationIterator(
     resultExpressions: Seq[NamedExpression],
     newMutableProjection: (Seq[Expression], Seq[Attribute]) => (() => MutableProjection),
     originalInputAttributes: Seq[Attribute],
+    inputIter: Iterator[InternalRow],
     testFallbackStartsAt: Option[Int],
     numInputRows: LongSQLMetric,
     numOutputRows: LongSQLMetric,
@@ -92,9 +95,6 @@ class TungstenAggregationIterator(
     spillSize: LongSQLMetric)
   extends Iterator[UnsafeRow] with Logging {
 
-  // The parent partition iterator, to be initialized later in `start`
-  private[this] var inputIter: Iterator[InternalRow] = null
-
   ///////////////////////////////////////////////////////////////////////////
   // Part 1: Initializing aggregate functions.
   ///////////////////////////////////////////////////////////////////////////
@@ -486,15 +486,11 @@ class TungstenAggregationIterator(
     false // disable tracking of performance metrics
   )
 
-  // Exposed for testing
-  private[aggregate] def getHashMap: UnsafeFixedWidthAggregationMap = hashMap
-
   // The function used to read and process input rows. When processing input rows,
   // it first uses hash-based aggregation by putting groups and their buffers in
   // hashMap. If we could not allocate more memory for the map, we switch to
   // sort-based aggregation (by calling switchToSortBasedAggregation).
   private def processInputs(): Unit = {
-    assert(inputIter != null, "attempted to process input when iterator was null")
     if (groupingExpressions.isEmpty) {
       // If there is no grouping expressions, we can just reuse the same buffer over and over again.
       // Note that it would be better to eliminate the hash map entirely in the future.
@@ -526,7 +522,6 @@ class TungstenAggregationIterator(
   // that it switch to sort-based aggregation after `fallbackStartsAt` input rows have
   // been processed.
   private def processInputsWithControlledFallback(fallbackStartsAt: Int): Unit = {
-    assert(inputIter != null, "attempted to process input when iterator was null")
     var i = 0
     while (!sortBased && inputIter.hasNext) {
       val newInput = inputIter.next()
@@ -567,15 +562,11 @@ class TungstenAggregationIterator(
    * Switch to sort-based aggregation when the hash-based approach is unable to acquire memory.
    */
   private def switchToSortBasedAggregation(firstKey: UnsafeRow, firstInput: InternalRow): Unit = {
-    assert(inputIter != null, "attempted to process input when iterator was null")
     logInfo("falling back to sort based aggregation.")
     // Step 1: Get the ExternalSorter containing sorted entries of the map.
     externalSorter = hashMap.destructAndCreateExternalSorter()
 
-    // Step 2: Free the memory used by the map.
-    hashMap.free()
-
-    // Step 3: If we have aggregate function with mode Partial or Complete,
+    // Step 2: If we have aggregate function with mode Partial or Complete,
     // we need to process input rows to get aggregation buffer.
     // So, later in the sort-based aggregation iterator, we can do merge.
     // If aggregate functions are with mode Final and PartialMerge,
@@ -770,31 +761,27 @@ class TungstenAggregationIterator(
 
   /**
    * Start processing input rows.
-   * Only after this method is called will this iterator be non-empty.
    */
-  def start(parentIter: Iterator[InternalRow]): Unit = {
-    inputIter = parentIter
-    testFallbackStartsAt match {
-      case None =>
-        processInputs()
-      case Some(fallbackStartsAt) =>
-        // This is the testing path. processInputsWithControlledFallback is same as processInputs
-        // except that it switches to sort-based aggregation after `fallbackStartsAt` input rows
-        // have been processed.
-        processInputsWithControlledFallback(fallbackStartsAt)
-    }
+  testFallbackStartsAt match {
+    case None =>
+      processInputs()
+    case Some(fallbackStartsAt) =>
+      // This is the testing path. processInputsWithControlledFallback is same as processInputs
+      // except that it switches to sort-based aggregation after `fallbackStartsAt` input rows
+      // have been processed.
+      processInputsWithControlledFallback(fallbackStartsAt)
+  }
 
-    // If we did not switch to sort-based aggregation in processInputs,
-    // we pre-load the first key-value pair from the map (to make hasNext idempotent).
-    if (!sortBased) {
-      // First, set aggregationBufferMapIterator.
-      aggregationBufferMapIterator = hashMap.iterator()
-      // Pre-load the first key-value pair from the aggregationBufferMapIterator.
-      mapIteratorHasNext = aggregationBufferMapIterator.next()
-      // If the map is empty, we just free it.
-      if (!mapIteratorHasNext) {
-        hashMap.free()
-      }
+  // If we did not switch to sort-based aggregation in processInputs,
+  // we pre-load the first key-value pair from the map (to make hasNext idempotent).
+  if (!sortBased) {
+    // First, set aggregationBufferMapIterator.
+    aggregationBufferMapIterator = hashMap.iterator()
+    // Pre-load the first key-value pair from the aggregationBufferMapIterator.
+    mapIteratorHasNext = aggregationBufferMapIterator.next()
+    // If the map is empty, we just free it.
+    if (!mapIteratorHasNext) {
+      hashMap.free()
     }
   }
 
@@ -868,13 +855,16 @@ class TungstenAggregationIterator(
    * Generate a output row when there is no input and there is no grouping expression.
    */
   def outputForEmptyGroupingKeyWithoutInput(): UnsafeRow = {
-    assert(groupingExpressions.isEmpty)
-    assert(inputIter == null)
-    generateOutput(UnsafeRow.createFromByteArray(0, 0), initialAggregationBuffer)
-  }
-
-  /** Free memory used in the underlying map. */
-  def free(): Unit = {
-    hashMap.free()
+    if (groupingExpressions.isEmpty) {
+      sortBasedAggregationBuffer.copyFrom(initialAggregationBuffer)
+      // We create a output row and copy it. So, we can free the map.
+      val resultCopy =
+        generateOutput(UnsafeRow.createFromByteArray(0, 0), sortBasedAggregationBuffer).copy()
+      hashMap.free()
+      resultCopy
+    } else {
+      throw new IllegalStateException(
+        "This method should not be called when groupingExpressions is not empty.")
+    }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index dd92dda48060..1a3832a698b6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.rdd.{MapPartitionsWithPreparationRDD, RDD}
+import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions._
@@ -26,7 +26,7 @@ import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.sql.types.StructType
 import org.apache.spark.util.CompletionIterator
 import org.apache.spark.util.collection.ExternalSorter
-import org.apache.spark.{SparkEnv, InternalAccumulator, TaskContext}
+import org.apache.spark.{InternalAccumulator, SparkEnv, TaskContext}
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // This file defines various sort operators.
@@ -77,6 +77,7 @@ case class Sort(
  * @param testSpillFrequency Method for configuring periodic spilling in unit tests. If set, will
  *                           spill every `frequency` records.
  */
+
 case class TungstenSort(
     sortOrder: Seq[SortOrder],
     global: Boolean,
@@ -106,11 +107,7 @@ case class TungstenSort(
     val dataSize = longMetric("dataSize")
     val spillSize = longMetric("spillSize")
 
-    /**
-     * Set up the sorter in each partition before computing the parent partition.
-     * This makes sure our sorter is not starved by other sorters used in the same task.
-     */
-    def preparePartition(): UnsafeExternalRowSorter = {
+    child.execute().mapPartitions { iter =>
       val ordering = newOrdering(sortOrder, childOutput)
 
       // The comparator for comparing prefix
@@ -131,33 +128,20 @@ case class TungstenSort(
       if (testSpillFrequency > 0) {
         sorter.setTestSpillFrequency(testSpillFrequency)
       }
-      sorter
-    }
 
-    /** Compute a partition using the sorter already set up previously. */
-    def executePartition(
-        taskContext: TaskContext,
-        partitionIndex: Int,
-        sorter: UnsafeExternalRowSorter,
-        parentIterator: Iterator[InternalRow]): Iterator[InternalRow] = {
       // Remember spill data size of this task before execute this operator so that we can
       // figure out how many bytes we spilled for this operator.
       val spillSizeBefore = TaskContext.get().taskMetrics().memoryBytesSpilled
 
-      val sortedIterator = sorter.sort(parentIterator.asInstanceOf[Iterator[UnsafeRow]])
+      val sortedIterator = sorter.sort(iter.asInstanceOf[Iterator[UnsafeRow]])
 
       dataSize += sorter.getPeakMemoryUsage
       spillSize += TaskContext.get().taskMetrics().memoryBytesSpilled - spillSizeBefore
 
-      taskContext.internalMetricsToAccumulators(
+      TaskContext.get().internalMetricsToAccumulators(
         InternalAccumulator.PEAK_EXECUTION_MEMORY).add(sorter.getPeakMemoryUsage)
       sortedIterator
     }
-
-    // Note: we need to set up the external sorter in each partition before computing
-    // the parent partition, so we cannot simply use `mapPartitions` here (SPARK-9709).
-    new MapPartitionsWithPreparationRDD[InternalRow, InternalRow, UnsafeExternalRowSorter](
-      child.execute(), preparePartition, executePartition, preservesPartitioning = true)
   }
 
 }

From e8ec2a7b01cc86329a6fbafc3d371bdfd79fc1d6 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 30 Oct 2015 16:12:33 -0700
Subject: [PATCH 423/896] Revert "[SPARK-11236][CORE] Update Tachyon dependency
 from 0.7.1 -> 0.8.0."

This reverts commit 4f5e60c647d7d6827438721b7fabbc3a57b81023.
---
 core/pom.xml         | 6 +++++-
 make-distribution.sh | 8 ++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/core/pom.xml b/core/pom.xml
index dff40e91ad22..319a50049a82 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -266,7 +266,7 @@
     <dependency>
       <groupId>org.tachyonproject</groupId>
       <artifactId>tachyon-client</artifactId>
-      <version>0.8.0</version>
+      <version>0.7.1</version>
       <exclusions>
         <exclusion>
           <groupId>org.apache.hadoop</groupId>
@@ -288,6 +288,10 @@
           <groupId>org.tachyonproject</groupId>
           <artifactId>tachyon-underfs-glusterfs</artifactId>
         </exclusion>
+        <exclusion>
+          <groupId>org.tachyonproject</groupId>
+          <artifactId>tachyon-underfs-s3</artifactId>
+        </exclusion>
       </exclusions>
     </dependency>
     <dependency>
diff --git a/make-distribution.sh b/make-distribution.sh
index f6766784813c..24418ace2627 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -33,9 +33,9 @@ SPARK_HOME="$(cd "`dirname "$0"`"; pwd)"
 DISTDIR="$SPARK_HOME/dist"
 
 SPARK_TACHYON=false
-TACHYON_VERSION="0.8.0"
+TACHYON_VERSION="0.7.1"
 TACHYON_TGZ="tachyon-${TACHYON_VERSION}-bin.tar.gz"
-TACHYON_URL="http://tachyon-project.org/downloads/files/${TACHYON_VERSION}/${TACHYON_TGZ}"
+TACHYON_URL="https://github.com/amplab/tachyon/releases/download/v${TACHYON_VERSION}/${TACHYON_TGZ}"
 
 MAKE_TGZ=false
 NAME=none
@@ -240,10 +240,10 @@ if [ "$SPARK_TACHYON" == "true" ]; then
   fi
 
   tar xzf "${TACHYON_TGZ}"
-  cp "tachyon-${TACHYON_VERSION}/assembly/target/tachyon-assemblies-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
+  cp "tachyon-${TACHYON_VERSION}/core/target/tachyon-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
   mkdir -p "$DISTDIR/tachyon/src/main/java/tachyon/web"
   cp -r "tachyon-${TACHYON_VERSION}"/{bin,conf,libexec} "$DISTDIR/tachyon"
-  cp -r "tachyon-${TACHYON_VERSION}"/servers/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
+  cp -r "tachyon-${TACHYON_VERSION}"/core/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
 
   if [[ `uname -a` == Darwin* ]]; then
     # need to run sed differently on osx

From 69b9e4b3c2f929e3df55f5e71875c03bb9712948 Mon Sep 17 00:00:00 2001
From: Nakul Jindal <njindal@us.ibm.com>
Date: Fri, 30 Oct 2015 17:12:24 -0700
Subject: [PATCH 424/896] [SPARK-11385] [ML] foreachActive made public in
 MLLib's vector API

Made foreachActive public in MLLib's vector API

Author: Nakul Jindal <njindal@us.ibm.com>

Closes #9362 from nakul02/SPARK-11385_foreach_for_mllib_linalg_vector.
---
 .../scala/org/apache/spark/mllib/linalg/Vectors.scala    | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
index dcdc614455d3..bd9badc03c34 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
@@ -123,7 +123,8 @@ sealed trait Vector extends Serializable {
    *          the vector with type `Int`, and the second parameter is the corresponding value
    *          with type `Double`.
    */
-  private[spark] def foreachActive(f: (Int, Double) => Unit)
+  @Since("1.6.0")
+  def foreachActive(f: (Int, Double) => Unit): Unit
 
   /**
    * Number of active entries.  An "active entry" is an element which is explicitly stored,
@@ -570,7 +571,8 @@ class DenseVector @Since("1.0.0") (
     new DenseVector(values.clone())
   }
 
-  private[spark] override def foreachActive(f: (Int, Double) => Unit) = {
+  @Since("1.6.0")
+  override def foreachActive(f: (Int, Double) => Unit): Unit = {
     var i = 0
     val localValuesSize = values.length
     val localValues = values
@@ -700,7 +702,8 @@ class SparseVector @Since("1.0.0") (
 
   private[spark] override def toBreeze: BV[Double] = new BSV[Double](indices, values, size)
 
-  private[spark] override def foreachActive(f: (Int, Double) => Unit) = {
+  @Since("1.6.0")
+  override def foreachActive(f: (Int, Double) => Unit): Unit = {
     var i = 0
     val localValuesSize = values.length
     val localIndices = indices

From 3c471885dc4f86bea95ab542e0d48d22ae748404 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 30 Oct 2015 20:05:07 -0700
Subject: [PATCH 425/896] [SPARK-11434][SPARK-11103][SQL] Fix test ": Filter
 applied on merged Parquet schema with new column fails"

https://issues.apache.org/jira/browse/SPARK-11434

Author: Yin Huai <yhuai@databricks.com>

Closes #9387 from yhuai/SPARK-11434.
---
 .../execution/datasources/parquet/ParquetFilterSuite.scala  | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index b2101beb9222..f88ddc77a6a4 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -323,15 +323,15 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
     withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true",
       SQLConf.PARQUET_SCHEMA_MERGING_ENABLED.key -> "true") {
       withTempPath { dir =>
-        var pathOne = s"${dir.getCanonicalPath}/table1"
+        val pathOne = s"${dir.getCanonicalPath}/table1"
         (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(pathOne)
-        var pathTwo = s"${dir.getCanonicalPath}/table2"
+        val pathTwo = s"${dir.getCanonicalPath}/table2"
         (1 to 3).map(i => (i, i.toString)).toDF("c", "b").write.parquet(pathTwo)
 
         // If the "c = 1" filter gets pushed down, this query will throw an exception which
         // Parquet emits. This is a Parquet issue (PARQUET-389).
         checkAnswer(
-          sqlContext.read.parquet(pathOne, pathTwo).filter("c = 1"),
+          sqlContext.read.parquet(pathOne, pathTwo).filter("c = 1").selectExpr("c", "b", "a"),
           (1 to 1).map(i => Row(i, i.toString, null)))
       }
     }

From 97b3c8fb470f0d3c1cdb1aeb27f675e695442e87 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Sat, 31 Oct 2015 11:10:37 +0000
Subject: [PATCH 426/896] [SPARK-11226][SQL] Empty line in json file should be
 skipped

Currently the empty line in json file will be parsed into Row with all null field values. But in json, "{}" represents a json object, empty line is supposed to be skipped.

Make a trivial change for this.

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9211 from zjffdu/SPARK-11226.
---
 .../datasources/json/JacksonParser.scala      | 46 ++++++++++---------
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 11 +++++
 .../datasources/json/JsonSuite.scala          |  3 --
 3 files changed, 36 insertions(+), 24 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
index b2e52011a727..4f53eeb081b9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
@@ -245,29 +245,33 @@ private[sql] object JacksonParser {
       val factory = new JsonFactory()
 
       iter.flatMap { record =>
-        try {
-          Utils.tryWithResource(factory.createParser(record)) { parser =>
-            parser.nextToken()
-
-            convertField(factory, parser, schema) match {
-              case null => failedRecord(record)
-              case row: InternalRow => row :: Nil
-              case array: ArrayData =>
-                if (array.numElements() == 0) {
-                  Nil
-                } else {
-                  array.toArray[InternalRow](schema)
-                }
-              case _ =>
-                sys.error(
-                  s"Failed to parse record $record. Please make sure that each line of the file " +
-                    "(or each string in the RDD) is a valid JSON object or " +
-                    "an array of JSON objects.")
+        if (record.trim.isEmpty) {
+          Nil
+        } else {
+          try {
+            Utils.tryWithResource(factory.createParser(record)) { parser =>
+              parser.nextToken()
+
+              convertField(factory, parser, schema) match {
+                case null => failedRecord(record)
+                case row: InternalRow => row :: Nil
+                case array: ArrayData =>
+                  if (array.numElements() == 0) {
+                    Nil
+                  } else {
+                    array.toArray[InternalRow](schema)
+                  }
+                case _ =>
+                  sys.error(
+                    s"Failed to parse record $record. Please make sure that each line of " +
+                      "the file (or each string in the RDD) is a valid JSON object or " +
+                      "an array of JSON objects.")
+              }
             }
+          } catch {
+            case _: JsonProcessingException =>
+              failedRecord(record)
           }
-        } catch {
-          case _: JsonProcessingException =>
-            failedRecord(record)
         }
       }
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 5a616fac0bc2..5413ef1287da 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -225,6 +225,17 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       Seq(Row("1"), Row("2")))
   }
 
+  test("SPARK-11226 Skip empty line in json file") {
+    sqlContext.read.json(
+      sparkContext.parallelize(
+        Seq("{\"a\": \"1\"}}", "{\"a\": \"2\"}}", "{\"a\": \"3\"}}", "")))
+      .registerTempTable("d")
+
+    checkAnswer(
+      sql("select count(1) from d"),
+      Seq(Row(3)))
+  }
+
   test("SPARK-8828 sum should return null if all input values are null") {
     withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "true") {
       withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index d3fd409291f2..28b8f02bdf87 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -959,7 +959,6 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
       withTempTable("jsonTable") {
         val jsonDF = sqlContext.read.json(corruptRecords)
         jsonDF.registerTempTable("jsonTable")
-
         val schema = StructType(
           StructField("_unparsed", StringType, true) ::
           StructField("a", StringType, true) ::
@@ -976,7 +975,6 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
               |FROM jsonTable
             """.stripMargin),
           Row(null, null, null, "{") ::
-            Row(null, null, null, "") ::
             Row(null, null, null, """{"a":1, b:2}""") ::
             Row(null, null, null, """{"a":{, b:3}""") ::
             Row("str_a_4", "str_b_4", "str_c_4", null) ::
@@ -1001,7 +999,6 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
               |WHERE _unparsed IS NOT NULL
             """.stripMargin),
           Row("{") ::
-            Row("") ::
             Row("""{"a":1, b:2}""") ::
             Row("""{"a":{, b:3}""") ::
             Row("]") :: Nil

From ac4118db2dda802b936bb7a18a08844846c71285 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sat, 31 Oct 2015 10:47:22 -0700
Subject: [PATCH 427/896] [SPARK-11424] Guard against double-close() of
 RecordReaders

**TL;DR**: We can rule out one rare but potential cause of input stream corruption via defensive programming.

## Background

[MAPREDUCE-5918](https://issues.apache.org/jira/browse/MAPREDUCE-5918) is a bug where an instance of a decompressor ends up getting placed into a pool multiple times. Since the pool is backed by a list instead of a set, this can lead to the same decompressor being used in different places at the same time, which is not safe because those decompressors will overwrite each other's buffers. Sometimes this buffer sharing will lead to exceptions but other times it will might silently result in invalid / garbled input.

That Hadoop bug is fixed in Hadoop 2.7 but is still present in many Hadoop versions that we wish to support. As a result, I think that we should try to work around this issue in Spark via defensive programming to prevent RecordReaders from being closed multiple times.

So far, I've had a hard time coming up with explanations of exactly how double-`close()`s occur in practice, but I do have a couple of explanations that work on paper.

For instance, it looks like https://github.com/apache/spark/pull/7424, added in 1.5, introduces at least one extremely~rare corner-case path where Spark could double-close() a LineRecordReader instance in a way that triggers the bug. Here are the steps involved in the bad execution that I brainstormed up:

* [The task has finished reading input, so we call close()](https://github.com/apache/spark/blob/v1.5.1/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala#L168).
* [While handling the close call and trying to close the reader, reader.close() throws an exception]( https://github.com/apache/spark/blob/v1.5.1/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala#L190)
* We don't set `reader = null` after handling this exception, so the [TaskCompletionListener also ends up calling NewHadoopRDD.close()](https://github.com/apache/spark/blob/v1.5.1/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala#L156), which, in turn, closes the record reader again.

In this hypothetical situation, `LineRecordReader.close()` could [fail with an exception if its InputStream failed to close](https://github.com/apache/hadoop/blob/release-1.2.1/src/mapred/org/apache/hadoop/mapred/LineRecordReader.java#L212).
I googled for "Exception in RecordReader.close()" and it looks like it's possible for a closed Hadoop FileSystem to trigger an error there: [SPARK-757](https://issues.apache.org/jira/browse/SPARK-757), [SPARK-2491](https://issues.apache.org/jira/browse/SPARK-2491)

Looking at [SPARK-3052](https://issues.apache.org/jira/browse/SPARK-3052), it seems like it's possible to get spurious exceptions there when there is an error reading from Hadoop. If the Hadoop FileSystem were to get into an error state _right_ after reading the last record then it looks like we could hit the bug here in 1.5.

## The fix

This patch guards against these issues by modifying `HadoopRDD.close()` and `NewHadoopRDD.close()` so that they set `reader = null` even if an exception occurs in the `reader.close()` call. In addition, I modified `NextIterator. closeIfNeeded()` to guard against double-close if the first `close()` call throws an exception.

I don't have an easy way to test this, since I haven't been able to reproduce the bug that prompted this patch, but these changes seem safe and seem to rule out the on-paper reproductions that I was able to brainstorm up.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9382 from JoshRosen/hadoop-decompressor-pooling-fix and squashes the following commits:

5ec97d7 [Josh Rosen] Add SqlNewHadoopRDD.unsetInputFileName() that I accidentally deleted.
ae46cf4 [Josh Rosen] Merge remote-tracking branch 'origin/master' into hadoop-decompressor-pooling-fix
087aa63 [Josh Rosen] Guard against double-close() of RecordReaders.
---
 .../org/apache/spark/rdd/HadoopRDD.scala      | 23 +++++----
 .../org/apache/spark/rdd/NewHadoopRDD.scala   | 44 ++++++++---------
 .../apache/spark/rdd/SqlNewHadoopRDD.scala    | 47 ++++++++++---------
 .../org/apache/spark/util/NextIterator.scala  |  4 +-
 4 files changed, 66 insertions(+), 52 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
index 77b57132b9f1..d841f05ec52c 100644
--- a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -251,8 +251,21 @@ class HadoopRDD[K, V](
       }
 
       override def close() {
-        try {
-          reader.close()
+        if (reader != null) {
+          // Close the reader and release it. Note: it's very important that we don't close the
+          // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
+          // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
+          // corruption issues when reading compressed input.
+          try {
+            reader.close()
+          } catch {
+            case e: Exception =>
+              if (!ShutdownHookManager.inShutdown()) {
+                logWarning("Exception in RecordReader.close()", e)
+              }
+          } finally {
+            reader = null
+          }
           if (bytesReadCallback.isDefined) {
             inputMetrics.updateBytesRead()
           } else if (split.inputSplit.value.isInstanceOf[FileSplit] ||
@@ -266,12 +279,6 @@ class HadoopRDD[K, V](
                 logWarning("Unable to get input size to set InputMetrics for task", e)
             }
           }
-        } catch {
-          case e: Exception => {
-            if (!ShutdownHookManager.inShutdown()) {
-              logWarning("Exception in RecordReader.close()", e)
-            }
-          }
         }
       }
     }
diff --git a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
index 2872b93b8730..9c4b70844bdb 100644
--- a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
@@ -184,30 +184,32 @@ class NewHadoopRDD[K, V](
       }
 
       private def close() {
-        try {
-          if (reader != null) {
-            // Close reader and release it
+        if (reader != null) {
+          // Close the reader and release it. Note: it's very important that we don't close the
+          // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
+          // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
+          // corruption issues when reading compressed input.
+          try {
             reader.close()
-            reader = null
-
-            if (bytesReadCallback.isDefined) {
-              inputMetrics.updateBytesRead()
-            } else if (split.serializableHadoopSplit.value.isInstanceOf[FileSplit] ||
-                       split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
-              // If we can't get the bytes read from the FS stats, fall back to the split size,
-              // which may be inaccurate.
-              try {
-                inputMetrics.incBytesRead(split.serializableHadoopSplit.value.getLength)
-              } catch {
-                case e: java.io.IOException =>
-                  logWarning("Unable to get input size to set InputMetrics for task", e)
+          } catch {
+            case e: Exception =>
+              if (!ShutdownHookManager.inShutdown()) {
+                logWarning("Exception in RecordReader.close()", e)
               }
-            }
+          } finally {
+            reader = null
           }
-        } catch {
-          case e: Exception => {
-            if (!ShutdownHookManager.inShutdown()) {
-              logWarning("Exception in RecordReader.close()", e)
+          if (bytesReadCallback.isDefined) {
+            inputMetrics.updateBytesRead()
+          } else if (split.serializableHadoopSplit.value.isInstanceOf[FileSplit] ||
+                     split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
+            // If we can't get the bytes read from the FS stats, fall back to the split size,
+            // which may be inaccurate.
+            try {
+              inputMetrics.incBytesRead(split.serializableHadoopSplit.value.getLength)
+            } catch {
+              case e: java.io.IOException =>
+                logWarning("Unable to get input size to set InputMetrics for task", e)
             }
           }
         }
diff --git a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
index 0228c54e0511..264dae7f3908 100644
--- a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
@@ -189,32 +189,35 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
       }
 
       private def close() {
-        try {
-          if (reader != null) {
+        if (reader != null) {
+          SqlNewHadoopRDD.unsetInputFileName()
+          // Close the reader and release it. Note: it's very important that we don't close the
+          // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
+          // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
+          // corruption issues when reading compressed input.
+          try {
             reader.close()
-            reader = null
-
-            SqlNewHadoopRDD.unsetInputFileName()
-
-            if (bytesReadCallback.isDefined) {
-              inputMetrics.updateBytesRead()
-            } else if (split.serializableHadoopSplit.value.isInstanceOf[FileSplit] ||
-                       split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
-              // If we can't get the bytes read from the FS stats, fall back to the split size,
-              // which may be inaccurate.
-              try {
-                inputMetrics.incBytesRead(split.serializableHadoopSplit.value.getLength)
-              } catch {
-                case e: java.io.IOException =>
-                  logWarning("Unable to get input size to set InputMetrics for task", e)
+          } catch {
+            case e: Exception =>
+              if (!ShutdownHookManager.inShutdown()) {
+                logWarning("Exception in RecordReader.close()", e)
               }
-            }
+          } finally {
+            reader = null
           }
-        } catch {
-          case e: Exception =>
-            if (!ShutdownHookManager.inShutdown()) {
-              logWarning("Exception in RecordReader.close()", e)
+          if (bytesReadCallback.isDefined) {
+            inputMetrics.updateBytesRead()
+          } else if (split.serializableHadoopSplit.value.isInstanceOf[FileSplit] ||
+                     split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
+            // If we can't get the bytes read from the FS stats, fall back to the split size,
+            // which may be inaccurate.
+            try {
+              inputMetrics.incBytesRead(split.serializableHadoopSplit.value.getLength)
+            } catch {
+              case e: java.io.IOException =>
+                logWarning("Unable to get input size to set InputMetrics for task", e)
             }
+          }
         }
       }
     }
diff --git a/core/src/main/scala/org/apache/spark/util/NextIterator.scala b/core/src/main/scala/org/apache/spark/util/NextIterator.scala
index e5c732a5a559..0b505a576768 100644
--- a/core/src/main/scala/org/apache/spark/util/NextIterator.scala
+++ b/core/src/main/scala/org/apache/spark/util/NextIterator.scala
@@ -60,8 +60,10 @@ private[spark] abstract class NextIterator[U] extends Iterator[U] {
    */
   def closeIfNeeded() {
     if (!closed) {
-      close()
+      // Note: it's important that we set closed = true before calling close(), since setting it
+      // afterwards would permit us to call close() multiple times if close() threw an exception.
       closed = true
+      close()
     }
   }
 

From fc27dfbf0f8d3f96c70e27d88f7d0316c97ddb1e Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Sat, 31 Oct 2015 12:55:33 -0700
Subject: [PATCH 428/896] [SPARK-11024][SQL] Optimize NULL in
 <inlist-expressions> by folding it to Literal(null)

Add a rule in optimizer to convert NULL [NOT] IN (expr1,...,expr2) to
Literal(null).

This is a follow up defect to SPARK-8654

cloud-fan Can you please take a look ?

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #9348 from dilipbiswal/spark_11024.
---
 .../sql/catalyst/optimizer/Optimizer.scala    |  5 ++
 .../catalyst/optimizer/OptimizeInSuite.scala  | 51 ++++++++++++++++++-
 2 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index d37f43888fd4..338c5193cb7a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -417,6 +417,11 @@ object NullPropagation extends Rule[LogicalPlan] {
         case left :: Literal(null, _) :: Nil => Literal.create(null, e.dataType)
         case _ => e
       }
+
+      // If the value expression is NULL then transform the In expression to
+      // Literal(null)
+      case In(Literal(null, _), list) => Literal.create(null, BooleanType)
+
     }
   }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizeInSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizeInSuite.scala
index 6f7b5b9572e2..48cab01ac100 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizeInSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/OptimizeInSuite.scala
@@ -35,7 +35,8 @@ class OptimizeInSuite extends PlanTest {
     val batches =
       Batch("AnalysisNodes", Once,
         EliminateSubQueries) ::
-      Batch("ConstantFolding", Once,
+      Batch("ConstantFolding", FixedPoint(10),
+        NullPropagation,
         ConstantFolding,
         BooleanSimplification,
         OptimizeIn) :: Nil
@@ -82,4 +83,52 @@ class OptimizeInSuite extends PlanTest {
 
     comparePlans(optimized, correctAnswer)
   }
+
+  test("OptimizedIn test: NULL IN (expr1, ..., exprN) gets transformed to Filter(null)") {
+    val originalQuery =
+      testRelation
+        .where(In(Literal.create(null, NullType), Seq(Literal(1), Literal(2))))
+        .analyze
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+    val correctAnswer =
+      testRelation
+        .where(Literal.create(null, BooleanType))
+        .analyze
+
+    comparePlans(optimized, correctAnswer)
+  }
+
+  test("OptimizedIn test: Inset optimization disabled as " +
+    "list expression contains attribute)") {
+    val originalQuery =
+      testRelation
+        .where(In(Literal.create(null, StringType), Seq(Literal(1), UnresolvedAttribute("b"))))
+        .analyze
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+    val correctAnswer =
+      testRelation
+        .where(Literal.create(null, BooleanType))
+        .analyze
+
+    comparePlans(optimized, correctAnswer)
+  }
+
+  test("OptimizedIn test: Inset optimization disabled as " +
+    "list expression contains attribute - select)") {
+    val originalQuery =
+      testRelation
+        .select(In(Literal.create(null, StringType),
+        Seq(Literal(1), UnresolvedAttribute("b"))).as("a")).analyze
+
+    val optimized = Optimize.execute(originalQuery.analyze)
+    val correctAnswer =
+      testRelation
+        .select(Literal.create(null, BooleanType).as("a"))
+        .analyze
+
+    comparePlans(optimized, correctAnswer)
+  }
+
 }

From 40d3c6797a3dfd037eb69b2bcd336d8544deddf5 Mon Sep 17 00:00:00 2001
From: Steve Loughran <stevel@hortonworks.com>
Date: Sat, 31 Oct 2015 18:23:15 -0700
Subject: [PATCH 429/896] [SPARK-11265][YARN] YarnClient can't get tokens to
 talk to Hive 1.2.1 in a secure cluster

This is a fix for SPARK-11265; the introspection code to get Hive delegation tokens failing on Spark 1.5.1+, due to changes in the Hive codebase

Author: Steve Loughran <stevel@hortonworks.com>

Closes #9232 from steveloughran/stevel/patches/SPARK-11265-hive-tokens.
---
 yarn/pom.xml                                  | 25 +++++++
 .../org/apache/spark/deploy/yarn/Client.scala | 51 +------------
 .../deploy/yarn/YarnSparkHadoopUtil.scala     | 73 +++++++++++++++++++
 .../yarn/YarnSparkHadoopUtilSuite.scala       | 29 ++++++++
 4 files changed, 129 insertions(+), 49 deletions(-)

diff --git a/yarn/pom.xml b/yarn/pom.xml
index 3eadacba13e1..989b820bec9e 100644
--- a/yarn/pom.xml
+++ b/yarn/pom.xml
@@ -162,6 +162,31 @@
        <artifactId>jersey-server</artifactId>
        <scope>test</scope>
      </dependency>
+
+    <!--
+     Testing Hive reflection needs hive on the test classpath only.
+     It doesn't need the spark hive modules, so the -Phive flag is not checked.
+      -->
+    <dependency>
+      <groupId>${hive.group}</groupId>
+      <artifactId>hive-exec</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>${hive.group}</groupId>
+      <artifactId>hive-metastore</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.thrift</groupId>
+      <artifactId>libthrift</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.thrift</groupId>
+      <artifactId>libfb303</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 4954b6180902..a3f33d80184a 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -1337,55 +1337,8 @@ object Client extends Logging {
       conf: Configuration,
       credentials: Credentials) {
     if (shouldGetTokens(sparkConf, "hive") && UserGroupInformation.isSecurityEnabled) {
-      val mirror = universe.runtimeMirror(getClass.getClassLoader)
-
-      try {
-        val hiveConfClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.conf.HiveConf")
-        val hiveConf = hiveConfClass.newInstance()
-
-        val hiveConfGet = (param: String) => Option(hiveConfClass
-          .getMethod("get", classOf[java.lang.String])
-          .invoke(hiveConf, param))
-
-        val metastore_uri = hiveConfGet("hive.metastore.uris")
-
-        // Check for local metastore
-        if (metastore_uri != None && metastore_uri.get.toString.size > 0) {
-          val hiveClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.ql.metadata.Hive")
-          val hive = hiveClass.getMethod("get").invoke(null, hiveConf.asInstanceOf[Object])
-
-          val metastore_kerberos_principal_conf_var = mirror.classLoader
-            .loadClass("org.apache.hadoop.hive.conf.HiveConf$ConfVars")
-            .getField("METASTORE_KERBEROS_PRINCIPAL").get("varname").toString
-
-          val principal = hiveConfGet(metastore_kerberos_principal_conf_var)
-
-          val username = Option(UserGroupInformation.getCurrentUser().getUserName)
-          if (principal != None && username != None) {
-            val tokenStr = hiveClass.getMethod("getDelegationToken",
-              classOf[java.lang.String], classOf[java.lang.String])
-              .invoke(hive, username.get, principal.get).asInstanceOf[java.lang.String]
-
-            val hive2Token = new Token[DelegationTokenIdentifier]()
-            hive2Token.decodeFromUrlString(tokenStr)
-            credentials.addToken(new Text("hive.server2.delegation.token"), hive2Token)
-            logDebug("Added hive.Server2.delegation.token to conf.")
-            hiveClass.getMethod("closeCurrent").invoke(null)
-          } else {
-            logError("Username or principal == NULL")
-            logError(s"""username=${username.getOrElse("(NULL)")}""")
-            logError(s"""principal=${principal.getOrElse("(NULL)")}""")
-            throw new IllegalArgumentException("username and/or principal is equal to null!")
-          }
-        } else {
-          logDebug("HiveMetaStore configured in localmode")
-        }
-      } catch {
-        case e: java.lang.NoSuchMethodException => { logInfo("Hive Method not found " + e); return }
-        case e: java.lang.ClassNotFoundException => { logInfo("Hive Class not found " + e); return }
-        case e: Exception => { logError("Unexpected Exception " + e)
-          throw new RuntimeException("Unexpected exception", e)
-        }
+      YarnSparkHadoopUtil.get.obtainTokenForHiveMetastore(conf).foreach {
+        credentials.addToken(new Text("hive.server2.delegation.token"), _)
       }
     }
   }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
index f276e7efde9d..5924daf3ece4 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
@@ -22,14 +22,17 @@ import java.util.regex.Matcher
 import java.util.regex.Pattern
 
 import scala.collection.mutable.HashMap
+import scala.reflect.runtime._
 import scala.util.Try
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier
 import org.apache.hadoop.io.Text
 import org.apache.hadoop.mapred.{Master, JobConf}
 import org.apache.hadoop.security.Credentials
 import org.apache.hadoop.security.UserGroupInformation
+import org.apache.hadoop.security.token.Token
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 import org.apache.hadoop.yarn.api.ApplicationConstants
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
@@ -142,6 +145,76 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
     val containerIdString = System.getenv(ApplicationConstants.Environment.CONTAINER_ID.name())
     ConverterUtils.toContainerId(containerIdString)
   }
+
+  /**
+   * Obtains token for the Hive metastore, using the current user as the principal.
+   * Some exceptions are caught and downgraded to a log message.
+   * @param conf hadoop configuration; the Hive configuration will be based on this
+   * @return a token, or `None` if there's no need for a token (no metastore URI or principal
+   *         in the config), or if a binding exception was caught and downgraded.
+   */
+  def obtainTokenForHiveMetastore(conf: Configuration): Option[Token[DelegationTokenIdentifier]] = {
+    try {
+      obtainTokenForHiveMetastoreInner(conf, UserGroupInformation.getCurrentUser().getUserName)
+    } catch {
+      case e: ClassNotFoundException =>
+        logInfo(s"Hive class not found $e")
+        logDebug("Hive class not found", e)
+        None
+    }
+  }
+
+  /**
+   * Inner routine to obtains token for the Hive metastore; exceptions are raised on any problem.
+   * @param conf hadoop configuration; the Hive configuration will be based on this.
+   * @param username the username of the principal requesting the delegating token.
+   * @return a delegation token
+   */
+  private[yarn] def obtainTokenForHiveMetastoreInner(conf: Configuration,
+      username: String): Option[Token[DelegationTokenIdentifier]] = {
+    val mirror = universe.runtimeMirror(Utils.getContextOrSparkClassLoader)
+
+    // the hive configuration class is a subclass of Hadoop Configuration, so can be cast down
+    // to a Configuration and used without reflection
+    val hiveConfClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.conf.HiveConf")
+    // using the (Configuration, Class) constructor allows the current configuratin to be included
+    // in the hive config.
+    val ctor = hiveConfClass.getDeclaredConstructor(classOf[Configuration],
+      classOf[Object].getClass)
+    val hiveConf = ctor.newInstance(conf, hiveConfClass).asInstanceOf[Configuration]
+    val metastoreUri = hiveConf.getTrimmed("hive.metastore.uris", "")
+
+    // Check for local metastore
+    if (metastoreUri.nonEmpty) {
+      require(username.nonEmpty, "Username undefined")
+      val principalKey = "hive.metastore.kerberos.principal"
+      val principal = hiveConf.getTrimmed(principalKey, "")
+      require(principal.nonEmpty, "Hive principal $principalKey undefined")
+      logDebug(s"Getting Hive delegation token for $username against $principal at $metastoreUri")
+      val hiveClass = mirror.classLoader.loadClass("org.apache.hadoop.hive.ql.metadata.Hive")
+      val closeCurrent = hiveClass.getMethod("closeCurrent")
+      try {
+        // get all the instance methods before invoking any
+        val getDelegationToken = hiveClass.getMethod("getDelegationToken",
+          classOf[String], classOf[String])
+        val getHive = hiveClass.getMethod("get", hiveConfClass)
+
+        // invoke
+        val hive = getHive.invoke(null, hiveConf)
+        val tokenStr = getDelegationToken.invoke(hive, username, principal).asInstanceOf[String]
+        val hive2Token = new Token[DelegationTokenIdentifier]()
+        hive2Token.decodeFromUrlString(tokenStr)
+        Some(hive2Token)
+      } finally {
+        Utils.tryLogNonFatalError {
+          closeCurrent.invoke(null)
+        }
+      }
+    } else {
+      logDebug("HiveMetaStore configured in localmode")
+      None
+    }
+  }
 }
 
 object YarnSparkHadoopUtil {
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
index e1c67db76571..9132c56a9175 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
@@ -18,10 +18,12 @@
 package org.apache.spark.deploy.yarn
 
 import java.io.{File, IOException}
+import java.lang.reflect.InvocationTargetException
 
 import com.google.common.io.{ByteStreams, Files}
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.hive.ql.metadata.HiveException
 import org.apache.hadoop.yarn.api.ApplicationConstants
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
 import org.apache.hadoop.yarn.conf.YarnConfiguration
@@ -245,4 +247,31 @@ class YarnSparkHadoopUtilSuite extends SparkFunSuite with Matchers with Logging
       System.clearProperty("SPARK_YARN_MODE")
     }
   }
+
+  test("Obtain tokens For HiveMetastore") {
+    val hadoopConf = new Configuration()
+    hadoopConf.set("hive.metastore.kerberos.principal", "bob")
+    // thrift picks up on port 0 and bails out, without trying to talk to endpoint
+    hadoopConf.set("hive.metastore.uris", "http://localhost:0")
+    val util = new YarnSparkHadoopUtil
+    assertNestedHiveException(intercept[InvocationTargetException] {
+      util.obtainTokenForHiveMetastoreInner(hadoopConf, "alice")
+    })
+    // expect exception trapping code to unwind this hive-side exception
+    assertNestedHiveException(intercept[InvocationTargetException] {
+      util.obtainTokenForHiveMetastore(hadoopConf)
+    })
+  }
+
+  def assertNestedHiveException(e: InvocationTargetException): Throwable = {
+    val inner = e.getCause
+    if (inner == null) {
+      fail("No inner cause", e)
+    }
+    if (!inner.isInstanceOf[HiveException]) {
+      fail("Not a hive exception", inner)
+    }
+    inner
+  }
+
 }

From aa494a9c2ebd59baec47beb434cd09bf3f188218 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Sat, 31 Oct 2015 21:16:09 -0700
Subject: [PATCH 430/896] [SPARK-11117] [SPARK-11345] [SQL] Makes all
 HadoopFsRelation data sources produce UnsafeRow

This PR fixes two issues:

1.  `PhysicalRDD.outputsUnsafeRows` is always `false`

    Thus a `ConvertToUnsafe` operator is often required even if the underlying data source relation does output `UnsafeRow`.

1.  Internal/external row conversion for `HadoopFsRelation` is kinda messy

    Currently we're using `HadoopFsRelation.needConversion` and [dirty type erasure hacks][1] to indicate whether the relation outputs external row or internal row and apply external-to-internal conversion when necessary.  Basically, all builtin `HadoopFsRelation` data sources, i.e. Parquet, JSON, ORC, and Text output `InternalRow`, while typical external `HadoopFsRelation` data sources, e.g. spark-avro and spark-csv, output `Row`.

This PR adds a `private[sql]` interface method `HadoopFsRelation.buildInternalScan`, which by default invokes `HadoopFsRelation.buildScan` and converts `Row`s to `UnsafeRow`s (which are also `InternalRow`s).  All builtin `HadoopFsRelation` data sources override this method and directly output `UnsafeRow`s.  In this way, now `HadoopFsRelation` always produces `UnsafeRow`s. Thus `PhysicalRDD.outputsUnsafeRows` can be properly set by checking whether the underlying data source is a `HadoopFsRelation`.

A remaining question is that, can we assume that all non-builtin `HadoopFsRelation` data sources output external rows?  At least all well known ones do so.  However it's possible that some users implemented their own `HadoopFsRelation` data sources that leverages `InternalRow` and thus all those unstable internal data representations.  If this assumption is safe, we can deprecate `HadoopFsRelation.needConversion` and cleanup some more conversion code (like [here][2] and [here][3]).

This PR supersedes #9125.

Follow-ups:

1.  Makes JSON and ORC data sources output `UnsafeRow` directly

1.  Makes `HiveTableScan` output `UnsafeRow` directly

    This is related to 1 since ORC data source shares the same `Writable` unwrapping code with `HiveTableScan`.

[1]: https://github.com/apache/spark/blob/v1.5.1/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala#L353
[2]: https://github.com/apache/spark/blob/v1.5.1/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala#L331-L335
[3]: https://github.com/apache/spark/blob/v1.5.1/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala#L630-L669

Author: Cheng Lian <lian@databricks.com>

Closes #9305 from liancheng/spark-11345.unsafe-hadoop-fs-relation.
---
 .../sql/columnar/GenerateColumnAccessor.scala |  2 +-
 .../spark/sql/execution/ExistingRDD.scala     |  8 ++--
 .../datasources/DataSourceStrategy.scala      | 30 ++++++++-----
 .../datasources/json/JSONRelation.scala       | 18 +++++---
 .../parquet/CatalystRecordMaterializer.scala  |  2 +-
 .../parquet/CatalystRowConverter.scala        |  8 +++-
 .../datasources/parquet/ParquetRelation.scala |  6 +--
 .../datasources/text/DefaultSource.scala      | 34 +++++++++-----
 .../apache/spark/sql/sources/interfaces.scala | 44 +++++++++++++++++--
 .../parquet/ParquetQuerySuite.scala           |  2 +-
 .../spark/sql/hive/orc/OrcRelation.scala      | 30 ++++++-------
 .../sql/sources/hadoopFsRelationSuites.scala  | 31 +++++++++++++
 12 files changed, 156 insertions(+), 59 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
index 7980a6f36d8e..ff9393b465b7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
@@ -34,7 +34,7 @@ abstract class ColumnarIterator extends Iterator[InternalRow] {
 /**
  * An helper class to update the fields of UnsafeRow, used by ColumnAccessor
  *
- * WARNNING: These setter MUST be called in increasing order of ordinals.
+ * WARNING: These setter MUST be called in increasing order of ordinals.
  */
 class MutableUnsafeRow(val writer: UnsafeRowWriter) extends GenericMutableRow(null) {
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
index 87bd92e00a2c..7a466cf6a0a9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
@@ -22,7 +22,7 @@ import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
 import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
 import org.apache.spark.sql.catalyst.expressions.{Attribute, GenericMutableRow}
 import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Statistics}
-import org.apache.spark.sql.sources.BaseRelation
+import org.apache.spark.sql.sources.{HadoopFsRelation, BaseRelation}
 import org.apache.spark.sql.types.DataType
 import org.apache.spark.sql.{Row, SQLContext}
 
@@ -93,7 +93,9 @@ private[sql] case class LogicalRDD(
 private[sql] case class PhysicalRDD(
     output: Seq[Attribute],
     rdd: RDD[InternalRow],
-    extraInformation: String) extends LeafNode {
+    extraInformation: String,
+    override val outputsUnsafeRows: Boolean = false)
+  extends LeafNode {
 
   protected override def doExecute(): RDD[InternalRow] = rdd
 
@@ -105,7 +107,7 @@ private[sql] object PhysicalRDD {
       output: Seq[Attribute],
       rdd: RDD[InternalRow],
       relation: BaseRelation): PhysicalRDD = {
-    PhysicalRDD(output, rdd, relation.toString)
+    PhysicalRDD(output, rdd, relation.toString, relation.isInstanceOf[HadoopFsRelation])
   }
 }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index af6626c89758..65859865c8fb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -17,21 +17,21 @@
 
 package org.apache.spark.sql.execution.datasources
 
-import org.apache.spark.{Logging, TaskContext}
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.rdd.{MapPartitionsRDD, RDD, UnionRDD}
 import org.apache.spark.sql.catalyst.CatalystTypeConverters.convertToScala
-import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow, expressions}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.planning.PhysicalOperation
 import org.apache.spark.sql.catalyst.plans.logical
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow, expressions}
 import org.apache.spark.sql.execution.SparkPlan
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types.{StringType, StructType}
 import org.apache.spark.sql.{SaveMode, Strategy, execution, sources, _}
 import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.{SerializableConfiguration, Utils}
+import org.apache.spark.{Logging, TaskContext}
 
 /**
  * A Strategy for planning scans over data sources defined using the sources API.
@@ -106,8 +106,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         l,
         projects,
         filters,
-        (a, f) =>
-          toCatalystRDD(l, a, t.buildScan(a.map(_.name).toArray, f, t.paths, confBroadcast))) :: Nil
+        (a, f) => t.buildInternalScan(a.map(_.name).toArray, f, t.paths, confBroadcast)) :: Nil
 
     case l @ LogicalRelation(baseRelation: TableScan, _) =>
       execution.PhysicalRDD.createFromDataSource(
@@ -152,7 +151,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
           // Don't scan any partition columns to save I/O.  Here we are being optimistic and
           // assuming partition columns data stored in data files are always consistent with those
           // partition values encoded in partition directory paths.
-          val dataRows = relation.buildScan(
+          val dataRows = relation.buildInternalScan(
             requiredDataColumns.map(_.name).toArray, filters, Array(dir), confBroadcast)
 
           // Merges data values with partition values.
@@ -161,7 +160,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
             requiredDataColumns,
             partitionColumns,
             partitionValues,
-            toCatalystRDD(logicalRelation, requiredDataColumns, dataRows))
+            dataRows)
         }
 
         val unionedRows =
@@ -199,15 +198,24 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
       // Builds `AttributeReference`s for all partition columns so that we can use them to project
       // required partition columns.  Note that if a partition column appears in `requiredColumns`,
       // we should use the `AttributeReference` in `requiredColumns`.
-      val requiredColumnMap = requiredColumns.map(a => a.name -> a).toMap
-      val partitionColumns = partitionColumnSchema.toAttributes.map { a =>
-        requiredColumnMap.getOrElse(a.name, a)
+      val partitionColumns = {
+        val requiredColumnMap = requiredColumns.map(a => a.name -> a).toMap
+        partitionColumnSchema.toAttributes.map { a =>
+          requiredColumnMap.getOrElse(a.name, a)
+        }
       }
 
       val mapPartitionsFunc = (_: TaskContext, _: Int, iterator: Iterator[InternalRow]) => {
-        val projection = UnsafeProjection.create(requiredColumns, dataColumns ++ partitionColumns)
+        // Note that we can't use an `UnsafeRowJoiner` to replace the following `JoinedRow` and
+        // `UnsafeProjection`.  Because the projection may also adjust column order.
         val mutableJoinedRow = new JoinedRow()
-        iterator.map(dataRow => projection(mutableJoinedRow(dataRow, partitionValues)))
+        val unsafePartitionValues = UnsafeProjection.create(partitionColumnSchema)(partitionValues)
+        val unsafeProjection =
+          UnsafeProjection.create(requiredColumns, dataColumns ++ partitionColumns)
+
+        iterator.map { unsafeDataRow =>
+          unsafeProjection(mutableJoinedRow(unsafeDataRow, unsafePartitionValues))
+        }
       }
 
       // This is an internal RDD whose call site the user should not be concerned with
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index 5f104fca7d62..85b52f04c8d0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -34,6 +34,7 @@ import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.mapred.SparkHadoopMapRedUtil
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions.UnsafeProjection
 import org.apache.spark.sql.execution.datasources.PartitionSpec
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types.StructType
@@ -122,14 +123,21 @@ private[sql] class JSONRelation(
     jsonSchema
   }
 
-  override def buildScan(
+  override private[sql] def buildInternalScan(
       requiredColumns: Array[String],
       filters: Array[Filter],
-      inputPaths: Array[FileStatus]): RDD[Row] = {
-    JacksonParser(
+      inputPaths: Array[FileStatus],
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
+    val requiredDataSchema = StructType(requiredColumns.map(dataSchema(_)))
+    val rows = JacksonParser(
       inputRDD.getOrElse(createBaseRdd(inputPaths)),
-      StructType(requiredColumns.map(dataSchema(_))),
-      sqlContext.conf.columnNameOfCorruptRecord).asInstanceOf[RDD[Row]]
+      requiredDataSchema,
+      sqlContext.conf.columnNameOfCorruptRecord)
+
+    rows.mapPartitions { iterator =>
+      val unsafeProjection = UnsafeProjection.create(requiredDataSchema)
+      iterator.map(unsafeProjection)
+    }
   }
 
   override def equals(other: Any): Boolean = other match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRecordMaterializer.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRecordMaterializer.scala
index ed9e0aa65977..eeead9f5d88a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRecordMaterializer.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRecordMaterializer.scala
@@ -35,7 +35,7 @@ private[parquet] class CatalystRecordMaterializer(
 
   private val rootConverter = new CatalystRowConverter(parquetSchema, catalystSchema, NoopUpdater)
 
-  override def getCurrentRecord: InternalRow = rootConverter.currentRow
+  override def getCurrentRecord: InternalRow = rootConverter.currentRecord
 
   override def getRootConverter: GroupConverter = rootConverter
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index b16c46579f7c..1f653cd3d3cb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -163,10 +163,14 @@ private[parquet] class CatalystRowConverter(
     override def setFloat(value: Float): Unit = row.setFloat(ordinal, value)
   }
 
+  private val currentRow = new SpecificMutableRow(catalystType.map(_.dataType))
+
+  private val unsafeProjection = UnsafeProjection.create(catalystType)
+
   /**
-   * Represents the converted row object once an entire Parquet record is converted.
+   * The [[UnsafeRow]] converted from an entire Parquet record.
    */
-  val currentRow = new SpecificMutableRow(catalystType.map(_.dataType))
+  def currentRecord: UnsafeRow = unsafeProjection(currentRow)
 
   // Converters for each field.
   private val fieldConverters: Array[Converter with HasParentContainerUpdater] = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 44649a68b3c9..5a7c6b95b565 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -282,11 +282,11 @@ private[sql] class ParquetRelation(
     }
   }
 
-  override def buildScan(
+  override def buildInternalScan(
       requiredColumns: Array[String],
       filters: Array[Filter],
       inputFiles: Array[FileStatus],
-      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[Row] = {
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
     val useMetadataCache = sqlContext.getConf(SQLConf.PARQUET_CACHE_METADATA)
     val parquetFilterPushDown = sqlContext.conf.parquetFilterPushDown
     val assumeBinaryIsString = sqlContext.conf.isParquetBinaryAsString
@@ -361,7 +361,7 @@ private[sql] class ParquetRelation(
               id, i, rawSplits.get(i).asInstanceOf[InputSplit with Writable])
           }
         }
-      }.asInstanceOf[RDD[Row]]  // type erasure hack to pass RDD[InternalRow] as RDD[Row]
+      }
     }
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
index ab26c57ad192..52c4421d7e87 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
@@ -25,16 +25,20 @@ import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat
 import org.apache.hadoop.mapreduce.{RecordWriter, TaskAttemptContext, Job}
 import org.apache.hadoop.mapreduce.lib.input.FileInputFormat
 
+import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.mapred.SparkHadoopMapRedUtil
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
+import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, GenericMutableRow}
+import org.apache.spark.sql.catalyst.expressions.codegen.{UnsafeRowWriter, BufferHolder}
+import org.apache.spark.sql.columnar.MutableUnsafeRow
 import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
 import org.apache.spark.sql.execution.datasources.PartitionSpec
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types.{StringType, StructType}
 import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.util.SerializableConfiguration
 
 /**
  * A data source for reading text files.
@@ -79,8 +83,12 @@ private[sql] class TextRelation(
   /** This is an internal data source that outputs internal row format. */
   override val needConversion: Boolean = false
 
-  /** Read path. */
-  override def buildScan(inputPaths: Array[FileStatus]): RDD[Row] = {
+
+  override private[sql] def buildInternalScan(
+      requiredColumns: Array[String],
+      filters: Array[Filter],
+      inputPaths: Array[FileStatus],
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
     val job = new Job(sqlContext.sparkContext.hadoopConfiguration)
     val conf = SparkHadoopUtil.get.getConfigurationFromJobContext(job)
     val paths = inputPaths.map(_.getPath).sortBy(_.toUri)
@@ -92,17 +100,19 @@ private[sql] class TextRelation(
     sqlContext.sparkContext.hadoopRDD(
       conf.asInstanceOf[JobConf], classOf[TextInputFormat], classOf[LongWritable], classOf[Text])
       .mapPartitions { iter =>
-        var buffer = new Array[Byte](1024)
-        val row = new GenericMutableRow(1)
+        val bufferHolder = new BufferHolder
+        val unsafeRowWriter = new UnsafeRowWriter
+        val unsafeRow = new UnsafeRow
+
         iter.map { case (_, line) =>
-          if (line.getLength > buffer.length) {
-            buffer = new Array[Byte](line.getLength)
-          }
-          System.arraycopy(line.getBytes, 0, buffer, 0, line.getLength)
-          row.update(0, UTF8String.fromBytes(buffer, 0, line.getLength))
-          row
+          // Writes to an UnsafeRow directly
+          bufferHolder.reset()
+          unsafeRowWriter.initialize(bufferHolder, 1)
+          unsafeRowWriter.write(0, line.getBytes, 0, line.getLength)
+          unsafeRow.pointTo(bufferHolder.buffer, 1, bufferHolder.totalSize())
+          unsafeRow
         }
-      }.asInstanceOf[RDD[Row]]
+      }
   }
 
   /** Write path. */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index a9a013e936fd..7a553511483f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -585,11 +585,11 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
     })
   }
 
-  final private[sql] def buildScan(
+  final private[sql] def buildInternalScan(
       requiredColumns: Array[String],
       filters: Array[Filter],
       inputPaths: Array[String],
-      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[Row] = {
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
     val inputStatuses = inputPaths.flatMap { input =>
       val path = new Path(input)
 
@@ -604,7 +604,7 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
       }
     }
 
-    buildScan(requiredColumns, filters, inputStatuses, broadcastedConf)
+    buildInternalScan(requiredColumns, filters, inputStatuses, broadcastedConf)
   }
 
   /**
@@ -740,6 +740,44 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
     buildScan(requiredColumns, filters, inputFiles)
   }
 
+  /**
+   * For a non-partitioned relation, this method builds an `RDD[InternalRow]` containing all rows
+   * within this relation. For partitioned relations, this method is called for each selected
+   * partition, and builds an `RDD[InternalRow]` containing all rows within that single partition.
+   *
+   * Note:
+   *
+   * 1. Rows contained in the returned `RDD[InternalRow]` are assumed to be `UnsafeRow`s.
+   * 2. This interface is subject to change in future.
+   *
+   * @param requiredColumns Required columns.
+   * @param filters Candidate filters to be pushed down. The actual filter should be the conjunction
+   *        of all `filters`.  The pushed down filters are currently purely an optimization as they
+   *        will all be evaluated again. This means it is safe to use them with methods that produce
+   *        false positives such as filtering partitions based on a bloom filter.
+   * @param inputFiles For a non-partitioned relation, it contains paths of all data files in the
+   *        relation. For a partitioned relation, it contains paths of all data files in a single
+   *        selected partition.
+   * @param broadcastedConf A shared broadcast Hadoop Configuration, which can be used to reduce the
+   *        overhead of broadcasting the Configuration for every Hadoop RDD.
+   */
+  private[sql] def buildInternalScan(
+      requiredColumns: Array[String],
+      filters: Array[Filter],
+      inputFiles: Array[FileStatus],
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
+    val requiredSchema = StructType(requiredColumns.map(dataSchema.apply))
+    val internalRows = {
+      val externalRows = buildScan(requiredColumns, filters, inputFiles, broadcastedConf)
+      execution.RDDConversions.rowToRowRdd(externalRows, requiredSchema.map(_.dataType))
+    }
+
+    internalRows.mapPartitions { iterator =>
+      val unsafeProjection = UnsafeProjection.create(requiredSchema)
+      iterator.map(unsafeProjection)
+    }
+  }
+
   /**
    * Prepares a write job and returns an [[OutputWriterFactory]].  Client side job preparation can
    * be put here.  For example, user defined output committer can be configured here
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
index baff7f5752a7..70fae32b7e7a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetQuerySuite.scala
@@ -22,8 +22,8 @@ import java.io.File
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.sql._
-import org.apache.spark.sql.catalyst.{TableIdentifier, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.SpecificMutableRow
+import org.apache.spark.sql.catalyst.{InternalRow, TableIdentifier}
 import org.apache.spark.sql.execution.datasources.parquet.TestingUDT.{NestedStruct, NestedStructUDT}
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
index d1f30e188eaf..45de56703976 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
@@ -19,21 +19,20 @@ package org.apache.spark.sql.hive.orc
 
 import java.util.Properties
 
-import scala.collection.JavaConverters._
-
 import com.google.common.base.Objects
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.{FileStatus, Path}
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
 import org.apache.hadoop.hive.ql.io.orc.{OrcInputFormat, OrcOutputFormat, OrcSerde, OrcSplit, OrcStruct}
 import org.apache.hadoop.hive.serde2.objectinspector.SettableStructObjectInspector
-import org.apache.hadoop.hive.serde2.typeinfo.{TypeInfoUtils, StructTypeInfo}
+import org.apache.hadoop.hive.serde2.typeinfo.{StructTypeInfo, TypeInfoUtils}
 import org.apache.hadoop.io.{NullWritable, Writable}
 import org.apache.hadoop.mapred.{InputFormat => MapRedInputFormat, JobConf, OutputFormat => MapRedOutputFormat, RecordWriter, Reporter}
 import org.apache.hadoop.mapreduce.lib.input.FileInputFormat
 import org.apache.hadoop.mapreduce.{Job, TaskAttemptContext}
 
 import org.apache.spark.Logging
+import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.mapred.SparkHadoopMapRedUtil
 import org.apache.spark.rdd.{HadoopRDD, RDD}
@@ -199,12 +198,13 @@ private[sql] class OrcRelation(
       partitionColumns)
   }
 
-  override def buildScan(
+  override private[sql] def buildInternalScan(
       requiredColumns: Array[String],
       filters: Array[Filter],
-      inputPaths: Array[FileStatus]): RDD[Row] = {
+      inputPaths: Array[FileStatus],
+      broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
     val output = StructType(requiredColumns.map(dataSchema(_))).toAttributes
-    OrcTableScan(output, this, filters, inputPaths).execute().asInstanceOf[RDD[Row]]
+    OrcTableScan(output, this, filters, inputPaths).execute()
   }
 
   override def prepareJobForWrite(job: Job): OutputWriterFactory = {
@@ -253,16 +253,17 @@ private[orc] case class OrcTableScan(
       path: String,
       conf: Configuration,
       iterator: Iterator[Writable],
-      nonPartitionKeyAttrs: Seq[(Attribute, Int)],
-      mutableRow: MutableRow): Iterator[InternalRow] = {
+      nonPartitionKeyAttrs: Seq[Attribute]): Iterator[InternalRow] = {
     val deserializer = new OrcSerde
     val maybeStructOI = OrcFileOperator.getObjectInspector(path, Some(conf))
+    val mutableRow = new SpecificMutableRow(attributes.map(_.dataType))
+    val unsafeProjection = UnsafeProjection.create(StructType.fromAttributes(nonPartitionKeyAttrs))
 
     // SPARK-8501: ORC writes an empty schema ("struct<>") to an ORC file if the file contains zero
     // rows, and thus couldn't give a proper ObjectInspector.  In this case we just return an empty
     // partition since we know that this file is empty.
     maybeStructOI.map { soi =>
-      val (fieldRefs, fieldOrdinals) = nonPartitionKeyAttrs.map {
+      val (fieldRefs, fieldOrdinals) = nonPartitionKeyAttrs.zipWithIndex.map {
         case (attr, ordinal) =>
           soi.getStructFieldRef(attr.name) -> ordinal
       }.unzip
@@ -280,7 +281,7 @@ private[orc] case class OrcTableScan(
           }
           i += 1
         }
-        mutableRow: InternalRow
+        unsafeProjection(mutableRow)
       }
     }.getOrElse {
       Iterator.empty
@@ -322,13 +323,8 @@ private[orc] case class OrcTableScan(
     val wrappedConf = new SerializableConfiguration(conf)
 
     rdd.mapPartitionsWithInputSplit { case (split: OrcSplit, iterator) =>
-      val mutableRow = new SpecificMutableRow(attributes.map(_.dataType))
-      fillObject(
-        split.getPath.toString,
-        wrappedConf.value,
-        iterator.map(_._2),
-        attributes.zipWithIndex,
-        mutableRow)
+      val writableIterator = iterator.map(_._2)
+      fillObject(split.getPath.toString, wrappedConf.value, writableIterator, attributes)
     }
   }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
index e3605bb3f6bf..100b97137cff 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
@@ -27,6 +27,7 @@ import org.apache.parquet.hadoop.ParquetOutputCommitter
 
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.sql._
+import org.apache.spark.sql.execution.ConvertToUnsafe
 import org.apache.spark.sql.execution.datasources.LogicalRelation
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.sql.test.SQLTestUtils
@@ -687,6 +688,36 @@ abstract class HadoopFsRelationTest extends QueryTest with SQLTestUtils with Tes
       sqlContext.sparkContext.conf.set("spark.speculation", speculationEnabled.toString)
     }
   }
+
+  test("HadoopFsRelation produces UnsafeRow") {
+    withTempTable("test_unsafe") {
+      withTempPath { dir =>
+        val path = dir.getCanonicalPath
+        sqlContext.range(3).write.format(dataSourceName).save(path)
+        sqlContext.read
+          .format(dataSourceName)
+          .option("dataSchema", new StructType().add("id", LongType, nullable = false).json)
+          .load(path)
+          .registerTempTable("test_unsafe")
+
+        val df = sqlContext.sql(
+          """SELECT COUNT(*)
+            |FROM test_unsafe a JOIN test_unsafe b
+            |WHERE a.id = b.id
+          """.stripMargin)
+
+        val plan = df.queryExecution.executedPlan
+
+        assert(
+          plan.collect { case plan: ConvertToUnsafe => plan }.isEmpty,
+          s"""Query plan shouldn't have ${classOf[ConvertToUnsafe].getSimpleName} node(s):
+             |$plan
+           """.stripMargin)
+
+        checkAnswer(df, Row(3))
+      }
+    }
+  }
 }
 
 // This class is used to test SPARK-8578. We should not use any custom output committer when

From 643c49c75ee95243fd19ae73b5170e6e6e212b8d Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Sun, 1 Nov 2015 12:25:49 +0000
Subject: [PATCH 431/896] [SPARK-11305][DOCS] Remove Third-Party Hadoop
 Distributions Doc Page

Remove Hadoop third party distro page, and move Hadoop cluster config info to configuration page

CC pwendell

Author: Sean Owen <sowen@cloudera.com>

Closes #9298 from srowen/SPARK-11305.
---
 README.md                                |   5 +-
 docs/_layouts/global.html                |   1 -
 docs/configuration.md                    |  15 +++
 docs/hadoop-third-party-distributions.md | 117 -----------------------
 docs/index.md                            |   1 -
 docs/programming-guide.md                |   9 +-
 6 files changed, 19 insertions(+), 129 deletions(-)
 delete mode 100644 docs/hadoop-third-party-distributions.md

diff --git a/README.md b/README.md
index 4116ef356387..c0d6a946035a 100644
--- a/README.md
+++ b/README.md
@@ -87,10 +87,7 @@ Hadoop, you must build Spark against the same version that your cluster runs.
 Please refer to the build documentation at
 ["Specifying the Hadoop Version"](http://spark.apache.org/docs/latest/building-spark.html#specifying-the-hadoop-version)
 for detailed guidance on building for a particular distribution of Hadoop, including
-building for particular Hive and Hive Thriftserver distributions. See also
-["Third Party Hadoop Distributions"](http://spark.apache.org/docs/latest/hadoop-third-party-distributions.html)
-for guidance on building a Spark application that works with a particular
-distribution.
+building for particular Hive and Hive Thriftserver distributions.
 
 ## Configuration
 
diff --git a/docs/_layouts/global.html b/docs/_layouts/global.html
index b4952fe97ca0..467ff7a03fb7 100755
--- a/docs/_layouts/global.html
+++ b/docs/_layouts/global.html
@@ -112,7 +112,6 @@
                                 <li><a href="job-scheduling.html">Job Scheduling</a></li>
                                 <li><a href="security.html">Security</a></li>
                                 <li><a href="hardware-provisioning.html">Hardware Provisioning</a></li>
-                                <li><a href="hadoop-third-party-distributions.html">3<sup>rd</sup>-Party Hadoop Distros</a></li>
                                 <li class="divider"></li>
                                 <li><a href="building-spark.html">Building Spark</a></li>
                                 <li><a href="https://cwiki.apache.org/confluence/display/SPARK/Contributing+to+Spark">Contributing to Spark</a></li>
diff --git a/docs/configuration.md b/docs/configuration.md
index 682384d4249e..c276e8e90dec 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1674,3 +1674,18 @@ Spark uses [log4j](http://logging.apache.org/log4j/) for logging. You can config
 To specify a different configuration directory other than the default "SPARK_HOME/conf",
 you can set SPARK_CONF_DIR. Spark will use the the configuration files (spark-defaults.conf, spark-env.sh, log4j.properties, etc)
 from this directory.
+
+# Inheriting Hadoop Cluster Configuration
+
+If you plan to read and write from HDFS using Spark, there are two Hadoop configuration files that
+should be included on Spark's classpath:
+
+* `hdfs-site.xml`, which provides default behaviors for the HDFS client.
+* `core-site.xml`, which sets the default filesystem name.
+
+The location of these configuration files varies across CDH and HDP versions, but
+a common location is inside of `/etc/hadoop/conf`. Some tools, such as Cloudera Manager, create
+configurations on-the-fly, but offer a mechanisms to download copies of them.
+
+To make these files visible to Spark, set `HADOOP_CONF_DIR` in `$SPARK_HOME/spark-env.sh`
+to a location containing the configuration files.
diff --git a/docs/hadoop-third-party-distributions.md b/docs/hadoop-third-party-distributions.md
deleted file mode 100644
index 795dd82a6be0..000000000000
--- a/docs/hadoop-third-party-distributions.md
+++ /dev/null
@@ -1,117 +0,0 @@
----
-layout: global
-title: Third-Party Hadoop Distributions
----
-
-Spark can run against all versions of Cloudera's Distribution Including Apache Hadoop (CDH) and
-the Hortonworks Data Platform (HDP). There are a few things to keep in mind when using Spark
-with these distributions:
-
-# Compile-time Hadoop Version
-
-When compiling Spark, you'll need to specify the Hadoop version by defining the `hadoop.version`
-property. For certain versions, you will need to specify additional profiles. For more detail,
-see the guide on [building with maven](building-spark.html#specifying-the-hadoop-version):
-
-    mvn -Dhadoop.version=1.0.4 -DskipTests clean package
-    mvn -Phadoop-2.3 -Dhadoop.version=2.3.0 -DskipTests clean package
-
-The table below lists the corresponding `hadoop.version` code for each CDH/HDP release. Note that
-some Hadoop releases are binary compatible across client versions. This means the pre-built Spark
-distribution may "just work" without you needing to compile. That said, we recommend compiling with
-the _exact_ Hadoop version you are running to avoid any compatibility errors.
-
-<table>
-  <tr valign="top">
-    <td>
-      <h3>CDH Releases</h3>
-      <table class="table" style="width:350px; margin-right: 20px;">
-        <tr><th>Release</th><th>Version code</th></tr>
-        <tr><td>CDH 4.X.X (YARN mode)</td><td>2.0.0-cdh4.X.X</td></tr>
-        <tr><td>CDH 4.X.X</td><td>2.0.0-mr1-cdh4.X.X</td></tr>
-      </table>
-    </td>
-    <td>
-      <h3>HDP Releases</h3>
-      <table class="table" style="width:350px;">
-        <tr><th>Release</th><th>Version code</th></tr>
-        <tr><td>HDP 1.3</td><td>1.2.0</td></tr>
-        <tr><td>HDP 1.2</td><td>1.1.2</td></tr>
-        <tr><td>HDP 1.1</td><td>1.0.3</td></tr>
-        <tr><td>HDP 1.0</td><td>1.0.3</td></tr>
-        <tr><td>HDP 2.0</td><td>2.2.0</td></tr>
-      </table>
-    </td>
-  </tr>
-</table>
-
-In SBT, the equivalent can be achieved by setting the the `hadoop.version` property:
-
-    build/sbt -Dhadoop.version=1.0.4 assembly
-
-# Linking Applications to the Hadoop Version
-
-In addition to compiling Spark itself against the right version, you need to add a Maven dependency on that
-version of `hadoop-client` to any Spark applications you run, so they can also talk to the HDFS version
-on the cluster. If you are using CDH, you also need to add the Cloudera Maven repository.
-This looks as follows in SBT:
-
-{% highlight scala %}
-libraryDependencies += "org.apache.hadoop" % "hadoop-client" % "<version>"
-
-// If using CDH, also add Cloudera repo
-resolvers += "Cloudera Repository" at "https://repository.cloudera.com/artifactory/cloudera-repos/"
-{% endhighlight %}
-
-Or in Maven:
-
-{% highlight xml %}
-<project>
-  <dependencies>
-    ...
-    <dependency>
-      <groupId>org.apache.hadoop</groupId>
-      <artifactId>hadoop-client</artifactId>
-      <version>[version]</version>
-    </dependency>
-  </dependencies>
-
-  <!-- If using CDH, also add Cloudera repo -->
-  <repositories>
-    ...
-    <repository>
-      <id>Cloudera repository</id>
-      <url>https://repository.cloudera.com/artifactory/cloudera-repos/</url>
-    </repository>
-  </repositories>
-</project>
-
-{% endhighlight %}
-
-# Where to Run Spark
-
-As described in the [Hardware Provisioning](hardware-provisioning.html#storage-systems) guide,
-Spark can run in a variety of deployment modes:
-
-* Using dedicated set of Spark nodes in your cluster. These nodes should be co-located with your
-  Hadoop installation.
-* Running on the same nodes as an existing Hadoop installation, with a fixed amount memory and
-  cores dedicated to Spark on each node.
-* Run Spark alongside Hadoop using a cluster resource manager, such as YARN or Mesos.
-
-These options are identical for those using CDH and HDP.
-
-# Inheriting Cluster Configuration
-
-If you plan to read and write from HDFS using Spark, there are two Hadoop configuration files that
-should be included on Spark's classpath:
-
-* `hdfs-site.xml`, which provides default behaviors for the HDFS client.
-* `core-site.xml`, which sets the default filesystem name.
-
-The location of these configuration files varies across CDH and HDP versions, but
-a common location is inside of `/etc/hadoop/conf`. Some tools, such as Cloudera Manager, create
-configurations on-the-fly, but offer a mechanisms to download copies of them.
-
-To make these files visible to Spark, set `HADOOP_CONF_DIR` in `$SPARK_HOME/spark-env.sh`
-to a location containing the configuration files.
diff --git a/docs/index.md b/docs/index.md
index c0dc2b8d7412..f1d9e012c6cf 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -117,7 +117,6 @@ options for deployment:
 * [Job Scheduling](job-scheduling.html): scheduling resources across and within Spark applications
 * [Security](security.html): Spark security support
 * [Hardware Provisioning](hardware-provisioning.html): recommendations for cluster hardware
-* [3<sup>rd</sup> Party Hadoop Distributions](hadoop-third-party-distributions.html): using common Hadoop distributions
 * Integration with other storage systems:
   * [OpenStack Swift](storage-openstack-swift.html)
 * [Building Spark](building-spark.html): build Spark using the Maven system
diff --git a/docs/programming-guide.md b/docs/programming-guide.md
index 22656fd7910c..f823b89a4b5e 100644
--- a/docs/programming-guide.md
+++ b/docs/programming-guide.md
@@ -34,8 +34,7 @@ To write a Spark application, you need to add a Maven dependency on Spark. Spark
     version = {{site.SPARK_VERSION}}
 
 In addition, if you wish to access an HDFS cluster, you need to add a dependency on
-`hadoop-client` for your version of HDFS. Some common HDFS version tags are listed on the
-[third party distributions](hadoop-third-party-distributions.html) page.
+`hadoop-client` for your version of HDFS.
 
     groupId = org.apache.hadoop
     artifactId = hadoop-client
@@ -66,8 +65,7 @@ To write a Spark application in Java, you need to add a dependency on Spark. Spa
     version = {{site.SPARK_VERSION}}
 
 In addition, if you wish to access an HDFS cluster, you need to add a dependency on
-`hadoop-client` for your version of HDFS. Some common HDFS version tags are listed on the
-[third party distributions](hadoop-third-party-distributions.html) page.
+`hadoop-client` for your version of HDFS.
 
     groupId = org.apache.hadoop
     artifactId = hadoop-client
@@ -93,8 +91,7 @@ This script will load Spark's Java/Scala libraries and allow you to submit appli
 You can also use `bin/pyspark` to launch an interactive Python shell.
 
 If you wish to access HDFS data, you need to use a build of PySpark linking
-to your version of HDFS. Some common HDFS version tags are listed on the
-[third party distributions](hadoop-third-party-distributions.html) page.
+to your version of HDFS.
 [Prebuilt packages](http://spark.apache.org/downloads.html) are also available on the Spark homepage
 for common HDFS versions.
 

From dc7e399fc01e74f2ba28ebd945785cc0f7759ccd Mon Sep 17 00:00:00 2001
From: Christian Kadner <ckadner@us.ibm.com>
Date: Sun, 1 Nov 2015 13:09:42 -0800
Subject: [PATCH 432/896] [SPARK-11338] [WEBUI] Prepend app links on
 HistoryPage with uiRoot path

[SPARK-11338: HistoryPage not multi-tenancy enabled ...](https://issues.apache.org/jira/browse/SPARK-11338)
- `HistoryPage.scala` ...prepending all page links with the web proxy (`uiRoot`) path
- `HistoryServerSuite.scala` ...adding a test case to verify all site-relative links are prefixed when the environment variable `APPLICATION_WEB_PROXY_BASE` (or System property `spark.ui.proxyBase`) is set

Author: Christian Kadner <ckadner@us.ibm.com>

Closes #9291 from ckadner/SPARK-11338 and squashes the following commits:

01d2f35 [Christian Kadner] [SPARK-11338][WebUI] nit fixes
d054bd7 [Christian Kadner] [SPARK-11338][WebUI] prependBaseUri in method makePageLink
8bcb3dc [Christian Kadner] [SPARK-11338][WebUI] Prepend application links on HistoryPage with uiRoot path
---
 .../spark/deploy/history/HistoryPage.scala    |  9 ++++----
 .../deploy/history/HistoryServerSuite.scala   | 21 +++++++++++++++++--
 2 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala b/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
index b347cb3be69f..642d71b18c9e 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/HistoryPage.scala
@@ -161,7 +161,7 @@ private[history] class HistoryPage(parent: HistoryServer) extends WebUIPage("")
       info: ApplicationHistoryInfo,
       attempt: ApplicationAttemptInfo,
       isFirst: Boolean): Seq[Node] = {
-    val uiAddress = HistoryServer.getAttemptURI(info.id, attempt.attemptId)
+    val uiAddress = UIUtils.prependBaseUri(HistoryServer.getAttemptURI(info.id, attempt.attemptId))
     val startTime = UIUtils.formatDate(attempt.startTime)
     val endTime = if (attempt.endTime > 0) UIUtils.formatDate(attempt.endTime) else "-"
     val duration =
@@ -190,8 +190,7 @@ private[history] class HistoryPage(parent: HistoryServer) extends WebUIPage("")
       {
         if (renderAttemptIdColumn) {
           if (info.attempts.size > 1 && attempt.attemptId.isDefined) {
-            <td><a href={HistoryServer.getAttemptURI(info.id, attempt.attemptId)}>
-              {attempt.attemptId.get}</a></td>
+            <td><a href={uiAddress}>{attempt.attemptId.get}</a></td>
           } else {
             <td>&nbsp;</td>
           }
@@ -218,9 +217,9 @@ private[history] class HistoryPage(parent: HistoryServer) extends WebUIPage("")
   }
 
   private def makePageLink(linkPage: Int, showIncomplete: Boolean): String = {
-    "/?" + Array(
+    UIUtils.prependBaseUri("/?" + Array(
       "page=" + linkPage,
       "showIncomplete=" + showIncomplete
-    ).mkString("&")
+      ).mkString("&"))
   }
 }
diff --git a/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerSuite.scala b/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerSuite.scala
index e5b5e1bb6533..4b7fd4f13b69 100644
--- a/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/history/HistoryServerSuite.scala
@@ -29,7 +29,7 @@ import org.scalatest.{BeforeAndAfter, Matchers}
 import org.scalatest.mock.MockitoSugar
 
 import org.apache.spark.{JsonTestUtils, SecurityManager, SparkConf, SparkFunSuite}
-import org.apache.spark.ui.SparkUI
+import org.apache.spark.ui.{SparkUI, UIUtils}
 
 /**
  * A collection of tests against the historyserver, including comparing responses from the json
@@ -261,7 +261,24 @@ class HistoryServerSuite extends SparkFunSuite with BeforeAndAfter with Matchers
       l <- links
       attrs <- l.attribute("href")
     } yield (attrs.toString)
-    justHrefs should contain(link)
+    justHrefs should contain (UIUtils.prependBaseUri(resource = link))
+  }
+
+  test("relative links are prefixed with uiRoot (spark.ui.proxyBase)") {
+    val proxyBaseBeforeTest = System.getProperty("spark.ui.proxyBase")
+    val uiRoot = Option(System.getenv("APPLICATION_WEB_PROXY_BASE")).getOrElse("/testwebproxybase")
+    val page = new HistoryPage(server)
+    val request = mock[HttpServletRequest]
+
+    // when
+    System.setProperty("spark.ui.proxyBase", uiRoot)
+    val response = page.render(request)
+    System.setProperty("spark.ui.proxyBase", Option(proxyBaseBeforeTest).getOrElse(""))
+
+    // then
+    val urls = response \\ "@href" map (_.toString)
+    val siteRelativeLinks = urls filter (_.startsWith("/"))
+    all (siteRelativeLinks) should startWith (uiRoot)
   }
 
   def getContentAndCode(path: String, port: Int = port): (Int, Option[String], Option[String]) = {

From 046e32ed8467e0f46ffeca1a95d4d40017eb5bdb Mon Sep 17 00:00:00 2001
From: Nong Li <nongli@gmail.com>
Date: Sun, 1 Nov 2015 14:32:21 -0800
Subject: [PATCH 433/896] [SPARK-11410][SQL] Add APIs to provide functionality
 similar to Hive's DISTRIBUTE BY and SORT BY.

DISTRIBUTE BY allows the user to hash partition the data by specified exprs. It also allows for
optioning sorting within each resulting partition. There is no required relationship between the
exprs for partitioning and sorting (i.e. one does not need to be a prefix of the other).

This patch adds to APIs to DataFrames which can be used together to provide this functionality:
  1. distributeBy() which partitions the data frame into a specified number of partitions using the
     partitioning exprs.
  2. localSort() which sorts each partition using the provided sorting exprs.

To get the DISTRIBUTE BY functionality, the user simply does: df.distributeBy(...).localSort(...)

Author: Nong Li <nongli@gmail.com>

Closes #9364 from nongli/spark-11410.
---
 .../catalyst/plans/logical/partitioning.scala |  19 ++-
 .../org/apache/spark/sql/DataFrame.scala      |  60 +++++++--
 .../spark/sql/execution/SparkStrategies.scala |   8 +-
 .../org/apache/spark/sql/DataFrameSuite.scala | 118 +++++++++++++++++-
 4 files changed, 186 insertions(+), 19 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/partitioning.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/partitioning.scala
index 1f76b03bcb0f..a5bdee1b854c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/partitioning.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/partitioning.scala
@@ -31,10 +31,19 @@ case class SortPartitions(sortExpressions: Seq[SortOrder], child: LogicalPlan)
   extends RedistributeData
 
 /**
- * This method repartitions data using [[Expression]]s, and receives information about the
- * number of partitions during execution. Used when a specific ordering or distribution is
- * expected by the consumer of the query result. Use [[Repartition]] for RDD-like
+ * This method repartitions data using [[Expression]]s into `numPartitions`, and receives
+ * information about the number of partitions during execution. Used when a specific ordering or
+ * distribution is expected by the consumer of the query result. Use [[Repartition]] for RDD-like
  * `coalesce` and `repartition`.
+ * If `numPartitions` is not specified, the number of partitions will be the number set by
+ * `spark.sql.shuffle.partitions`.
  */
-case class RepartitionByExpression(partitionExpressions: Seq[Expression], child: LogicalPlan)
-  extends RedistributeData
+case class RepartitionByExpression(
+    partitionExpressions: Seq[Expression],
+    child: LogicalPlan,
+    numPartitions: Option[Int] = None) extends RedistributeData {
+  numPartitions match {
+    case Some(n) => require(n > 0, "numPartitions must be greater than 0.")
+    case None => // Ok
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index aa817a037ef5..53ad3c0266cd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -241,6 +241,18 @@ class DataFrame private[sql](
     sb.toString()
   }
 
+  private[sql] def sortInternal(global: Boolean, sortExprs: Seq[Column]): DataFrame = {
+    val sortOrder: Seq[SortOrder] = sortExprs.map { col =>
+      col.expr match {
+        case expr: SortOrder =>
+          expr
+        case expr: Expression =>
+          SortOrder(expr, Ascending)
+      }
+    }
+    Sort(sortOrder, global = global, logicalPlan)
+  }
+
   override def toString: String = {
     try {
       schema.map(f => s"${f.name}: ${f.dataType.simpleString}").mkString("[", ", ", "]")
@@ -633,15 +645,7 @@ class DataFrame private[sql](
    */
   @scala.annotation.varargs
   def sort(sortExprs: Column*): DataFrame = {
-    val sortOrder: Seq[SortOrder] = sortExprs.map { col =>
-      col.expr match {
-        case expr: SortOrder =>
-          expr
-        case expr: Expression =>
-          SortOrder(expr, Ascending)
-      }
-    }
-    Sort(sortOrder, global = true, logicalPlan)
+    sortInternal(true, sortExprs)
   }
 
   /**
@@ -662,6 +666,44 @@ class DataFrame private[sql](
   @scala.annotation.varargs
   def orderBy(sortExprs: Column*): DataFrame = sort(sortExprs : _*)
 
+  /**
+   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions into
+   * `numPartitions`. The resulting DataFrame is hash partitioned.
+   * @group dfops
+   * @since 1.6.0
+   */
+  def distributeBy(partitionExprs: Seq[Column], numPartitions: Int): DataFrame = {
+    RepartitionByExpression(partitionExprs.map { _.expr }, logicalPlan, Some(numPartitions))
+  }
+
+  /**
+   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions preserving
+   * the existing number of partitions. The resulting DataFrame is hash partitioned.
+   * @group dfops
+   * @since 1.6.0
+   */
+  def distributeBy(partitionExprs: Seq[Column]): DataFrame = {
+    RepartitionByExpression(partitionExprs.map { _.expr }, logicalPlan, None)
+  }
+
+  /**
+   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def localSort(sortCol: String, sortCols: String*): DataFrame = localSort(sortCol, sortCols : _*)
+
+  /**
+   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def localSort(sortExprs: Column*): DataFrame = {
+    sortInternal(false, sortExprs)
+  }
+
   /**
    * Selects column based on the column name and return it as a [[Column]].
    * Note that the column name can also reference to a nested column like `a.b`.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 86d1d390f191..f4464e0b916f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -27,8 +27,7 @@ import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.columnar.{InMemoryColumnarTableScan, InMemoryRelation}
 import org.apache.spark.sql.execution.datasources.{CreateTableUsing, CreateTempTableUsing, DescribeCommand => LogicalDescribeCommand, _}
 import org.apache.spark.sql.execution.{DescribeCommand => RunnableDescribeCommand}
-import org.apache.spark.sql.types._
-import org.apache.spark.sql.{SQLContext, Strategy, execution}
+import org.apache.spark.sql.{Strategy, execution}
 
 private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
   self: SparkPlanner =>
@@ -455,8 +454,9 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
           generator, join = join, outer = outer, g.output, planLater(child)) :: Nil
       case logical.OneRowRelation =>
         execution.PhysicalRDD(Nil, singleRowRdd, "OneRowRelation") :: Nil
-      case logical.RepartitionByExpression(expressions, child) =>
-        execution.Exchange(HashPartitioning(expressions, numPartitions), planLater(child)) :: Nil
+      case logical.RepartitionByExpression(expressions, child, nPartitions) =>
+        execution.Exchange(HashPartitioning(
+          expressions, nPartitions.getOrElse(numPartitions)), planLater(child)) :: Nil
       case e @ EvaluatePython(udf, child, _) =>
         BatchPythonEvaluation(udf, e.output, planLater(child)) :: Nil
       case LogicalRDD(output, rdd) => PhysicalRDD(output, rdd, "PhysicalRDD") :: Nil
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index c9d6e19d2ce9..6b86c5951b41 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -24,10 +24,14 @@ import scala.util.Random
 
 import org.scalatest.Matchers._
 
+import org.apache.spark.SparkException
 import org.apache.spark.sql.catalyst.plans.logical.OneRowRelation
+import org.apache.spark.sql.execution.Exchange
+import org.apache.spark.sql.execution.aggregate.TungstenAggregate
 import org.apache.spark.sql.functions._
+import org.apache.spark.sql.test.SQLTestData.TestData2
+import org.apache.spark.sql.test.{ExamplePoint, ExamplePointUDT, SharedSQLContext}
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.test.{ExamplePointUDT, ExamplePoint, SharedSQLContext}
 
 class DataFrameSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
@@ -997,4 +1001,116 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       }
     }
   }
+
+  /**
+   * Verifies that there is no Exchange between the Aggregations for `df`
+   */
+  private def verifyNonExchangingAgg(df: DataFrame) = {
+    var atFirstAgg: Boolean = false
+    df.queryExecution.executedPlan.foreach {
+      case agg: TungstenAggregate => {
+        atFirstAgg = !atFirstAgg
+      }
+      case _ => {
+        if (atFirstAgg) {
+          fail("Should not have operators between the two aggregations")
+        }
+      }
+    }
+  }
+
+  /**
+   * Verifies that there is an Exchange between the Aggregations for `df`
+   */
+  private def verifyExchangingAgg(df: DataFrame) = {
+    var atFirstAgg: Boolean = false
+    df.queryExecution.executedPlan.foreach {
+      case agg: TungstenAggregate => {
+        if (atFirstAgg) {
+          fail("Should not have back to back Aggregates")
+        }
+        atFirstAgg = true
+      }
+      case e: Exchange => atFirstAgg = false
+      case _ =>
+    }
+  }
+
+  test("distributeBy and localSort") {
+    val original = testData.repartition(1)
+    assert(original.rdd.partitions.length == 1)
+    val df = original.distributeBy(Column("key") :: Nil, 5)
+    assert(df.rdd.partitions.length  == 5)
+    checkAnswer(original.select(), df.select())
+
+    val df2 = original.distributeBy(Column("key") :: Nil, 10)
+    assert(df2.rdd.partitions.length  == 10)
+    checkAnswer(original.select(), df2.select())
+
+    // Group by the column we are distributed by. This should generate a plan with no exchange
+    // between the aggregates
+    val df3 = testData.distributeBy(Column("key") :: Nil).groupBy("key").count()
+    verifyNonExchangingAgg(df3)
+    verifyNonExchangingAgg(testData.distributeBy(Column("key") :: Column("value") :: Nil)
+      .groupBy("key", "value").count())
+
+    // Grouping by just the first distributeBy expr, need to exchange.
+    verifyExchangingAgg(testData.distributeBy(Column("key") :: Column("value") :: Nil)
+      .groupBy("key").count())
+
+    val data = sqlContext.sparkContext.parallelize(
+      (1 to 100).map(i => TestData2(i % 10, i))).toDF()
+
+    // Distribute and order by.
+    val df4 = data.distributeBy(Column("a") :: Nil).localSort($"b".desc)
+    // Walk each partition and verify that it is sorted descending and does not contain all
+    // the values.
+    df4.rdd.foreachPartition(p => {
+      var previousValue: Int = -1
+      var allSequential: Boolean = true
+      p.foreach(r => {
+        val v: Int = r.getInt(1)
+        if (previousValue != -1) {
+          if (previousValue < v) throw new SparkException("Partition is not ordered.")
+          if (v + 1 != previousValue) allSequential = false
+        }
+        previousValue = v
+      })
+      if (allSequential) throw new SparkException("Partition should not be globally ordered")
+    })
+
+    // Distribute and order by with multiple order bys
+    val df5 = data.distributeBy(Column("a") :: Nil, 2).localSort($"b".asc, $"a".asc)
+    // Walk each partition and verify that it is sorted ascending
+    df5.rdd.foreachPartition(p => {
+      var previousValue: Int = -1
+      var allSequential: Boolean = true
+      p.foreach(r => {
+        val v: Int = r.getInt(1)
+        if (previousValue != -1) {
+          if (previousValue > v) throw new SparkException("Partition is not ordered.")
+          if (v - 1 != previousValue) allSequential = false
+        }
+        previousValue = v
+      })
+      if (allSequential) throw new SparkException("Partition should not be all sequential")
+    })
+
+    // Distribute into one partition and order by. This partition should contain all the values.
+    val df6 = data.distributeBy(Column("a") :: Nil, 1).localSort($"b".asc)
+    // Walk each partition and verify that it is sorted descending and not globally sorted.
+    df6.rdd.foreachPartition(p => {
+      var previousValue: Int = -1
+      var allSequential: Boolean = true
+      p.foreach(r => {
+        val v: Int = r.getInt(1)
+        if (previousValue != -1) {
+          if (previousValue > v) throw new SparkException("Partition is not ordered.")
+          if (v - 1 != previousValue) allSequential = false
+        }
+        previousValue = v
+      })
+      if (!allSequential) throw new SparkException("Partition should contain all sequential values")
+    })
+  }
 }

From cf04fdfe71abc395163a625cc1f99ec5e54cc07e Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Sun, 1 Nov 2015 14:42:18 -0800
Subject: [PATCH 434/896] [SPARK-11020][CORE] Wait for HDFS to leave safe mode
 before initializing HS.

Large HDFS clusters may take a while to leave safe mode when starting; this change
makes the HS wait for that before doing checks about its configuraton. This means
the HS won't stop right away if HDFS is in safe mode and the configuration is not
correct, but that should be a very uncommon situation.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9043 from vanzin/SPARK-11020.
---
 .../deploy/history/FsHistoryProvider.scala    | 104 +++++++++++++++++-
 .../history/FsHistoryProviderSuite.scala      |  65 +++++++++++
 2 files changed, 166 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
index 80bfda9dddb3..24aa386c7212 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
@@ -27,6 +27,7 @@ import scala.collection.mutable
 import com.google.common.io.ByteStreams
 import com.google.common.util.concurrent.{MoreExecutors, ThreadFactoryBuilder}
 import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
+import org.apache.hadoop.hdfs.DistributedFileSystem
 import org.apache.hadoop.security.AccessControlException
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkException}
@@ -52,6 +53,10 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
 
   private val NOT_STARTED = "<Not Started>"
 
+  // Interval between safemode checks.
+  private val SAFEMODE_CHECK_INTERVAL_S = conf.getTimeAsSeconds(
+    "spark.history.fs.safemodeCheck.interval", "5s")
+
   // Interval between each check for event log updates
   private val UPDATE_INTERVAL_S = conf.getTimeAsSeconds("spark.history.fs.update.interval", "10s")
 
@@ -107,9 +112,57 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
     }
   }
 
-  initialize()
+  // Conf option used for testing the initialization code.
+  val initThread = if (!conf.getBoolean("spark.history.testing.skipInitialize", false)) {
+      initialize(None)
+    } else {
+      null
+    }
+
+  private[history] def initialize(errorHandler: Option[Thread.UncaughtExceptionHandler]): Thread = {
+    if (!isFsInSafeMode()) {
+      startPolling()
+      return null
+    }
+
+    // Cannot probe anything while the FS is in safe mode, so spawn a new thread that will wait
+    // for the FS to leave safe mode before enabling polling. This allows the main history server
+    // UI to be shown (so that the user can see the HDFS status).
+    //
+    // The synchronization in the run() method is needed because of the tests; mockito can
+    // misbehave if the test is modifying the mocked methods while the thread is calling
+    // them.
+    val initThread = new Thread(new Runnable() {
+      override def run(): Unit = {
+        try {
+          clock.synchronized {
+            while (isFsInSafeMode()) {
+              logInfo("HDFS is still in safe mode. Waiting...")
+              val deadline = clock.getTimeMillis() +
+                TimeUnit.SECONDS.toMillis(SAFEMODE_CHECK_INTERVAL_S)
+              clock.waitTillTime(deadline)
+            }
+          }
+          startPolling()
+        } catch {
+          case _: InterruptedException =>
+        }
+      }
+    })
+    initThread.setDaemon(true)
+    initThread.setName(s"${getClass().getSimpleName()}-init")
+    initThread.setUncaughtExceptionHandler(errorHandler.getOrElse(
+      new Thread.UncaughtExceptionHandler() {
+        override def uncaughtException(t: Thread, e: Throwable): Unit = {
+          logError("Error initializing FsHistoryProvider.", e)
+          System.exit(1)
+        }
+      }))
+    initThread.start()
+    initThread
+  }
 
-  private def initialize(): Unit = {
+  private def startPolling(): Unit = {
     // Validate the log directory.
     val path = new Path(logDir)
     if (!fs.exists(path)) {
@@ -170,7 +223,21 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
     }
   }
 
-  override def getConfig(): Map[String, String] = Map("Event log directory" -> logDir.toString)
+  override def getConfig(): Map[String, String] = {
+    val safeMode = if (isFsInSafeMode()) {
+      Map("HDFS State" -> "In safe mode, application logs not available.")
+    } else {
+      Map()
+    }
+    Map("Event log directory" -> logDir.toString) ++ safeMode
+  }
+
+  override def stop(): Unit = {
+    if (initThread != null && initThread.isAlive()) {
+      initThread.interrupt()
+      initThread.join()
+    }
+  }
 
   /**
    * Builds the application list based on the current contents of the log directory.
@@ -585,6 +652,37 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
     }
   }
 
+  /**
+   * Checks whether HDFS is in safe mode. The API is slightly different between hadoop 1 and 2,
+   * so we have to resort to ugly reflection (as usual...).
+   *
+   * Note that DistributedFileSystem is a `@LimitedPrivate` class, which for all practical reasons
+   * makes it more public than not.
+   */
+  private[history] def isFsInSafeMode(): Boolean = fs match {
+    case dfs: DistributedFileSystem =>
+      isFsInSafeMode(dfs)
+    case _ =>
+      false
+  }
+
+  // For testing.
+  private[history] def isFsInSafeMode(dfs: DistributedFileSystem): Boolean = {
+    val hadoop1Class = "org.apache.hadoop.hdfs.protocol.FSConstants$SafeModeAction"
+    val hadoop2Class = "org.apache.hadoop.hdfs.protocol.HdfsConstants$SafeModeAction"
+    val actionClass: Class[_] =
+      try {
+        getClass().getClassLoader().loadClass(hadoop2Class)
+      } catch {
+        case _: ClassNotFoundException =>
+          getClass().getClassLoader().loadClass(hadoop1Class)
+      }
+
+    val action = actionClass.getField("SAFEMODE_GET").get(null)
+    val method = dfs.getClass().getMethod("setSafeMode", action.getClass())
+    method.invoke(dfs, action).asInstanceOf[Boolean]
+  }
+
 }
 
 private[history] object FsHistoryProvider {
diff --git a/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala b/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
index 73cff89544dc..833aab14ca2d 100644
--- a/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
@@ -24,13 +24,19 @@ import java.util.concurrent.TimeUnit
 import java.util.zip.{ZipInputStream, ZipOutputStream}
 
 import scala.io.Source
+import scala.concurrent.duration._
+import scala.language.postfixOps
 
 import com.google.common.base.Charsets
 import com.google.common.io.{ByteStreams, Files}
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.hdfs.DistributedFileSystem
 import org.json4s.jackson.JsonMethods._
+import org.mockito.Matchers.any
+import org.mockito.Mockito.{doReturn, mock, spy, verify, when}
 import org.scalatest.BeforeAndAfter
 import org.scalatest.Matchers
+import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark.{Logging, SparkConf, SparkFunSuite}
 import org.apache.spark.io._
@@ -407,6 +413,65 @@ class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matc
     }
   }
 
+  test("provider correctly checks whether fs is in safe mode") {
+    val provider = spy(new FsHistoryProvider(createTestConf()))
+    val dfs = mock(classOf[DistributedFileSystem])
+    // Asserts that safe mode is false because we can't really control the return value of the mock,
+    // since the API is different between hadoop 1 and 2.
+    assert(!provider.isFsInSafeMode(dfs))
+  }
+
+  test("provider waits for safe mode to finish before initializing") {
+    val clock = new ManualClock()
+    val conf = createTestConf().set("spark.history.testing.skipInitialize", "true")
+    val provider = spy(new FsHistoryProvider(conf, clock))
+    doReturn(true).when(provider).isFsInSafeMode()
+
+    val initThread = provider.initialize(None)
+    try {
+      provider.getConfig().keys should contain ("HDFS State")
+
+      clock.setTime(5000)
+      provider.getConfig().keys should contain ("HDFS State")
+
+      // Synchronization needed because of mockito.
+      clock.synchronized {
+        doReturn(false).when(provider).isFsInSafeMode()
+        clock.setTime(10000)
+      }
+
+      eventually(timeout(1 second), interval(10 millis)) {
+        provider.getConfig().keys should not contain ("HDFS State")
+      }
+    } finally {
+      provider.stop()
+    }
+  }
+
+  test("provider reports error after FS leaves safe mode") {
+    testDir.delete()
+    val clock = new ManualClock()
+    val conf = createTestConf().set("spark.history.testing.skipInitialize", "true")
+    val provider = spy(new FsHistoryProvider(conf, clock))
+    doReturn(true).when(provider).isFsInSafeMode()
+
+    val errorHandler = mock(classOf[Thread.UncaughtExceptionHandler])
+    val initThread = provider.initialize(Some(errorHandler))
+    try {
+      // Synchronization needed because of mockito.
+      clock.synchronized {
+        doReturn(false).when(provider).isFsInSafeMode()
+        clock.setTime(10000)
+      }
+
+      eventually(timeout(1 second), interval(10 millis)) {
+        verify(errorHandler).uncaughtException(any(), any())
+      }
+    } finally {
+      provider.stop()
+    }
+  }
+
   /**
    * Asks the provider to check for logs and calls a function to perform checks on the updated
    * app list. Example:

From f8d93edec82eedab59d50aec06ca2de7e4cf14f6 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Sun, 1 Nov 2015 15:57:42 -0800
Subject: [PATCH 435/896] [SPARK-11073][CORE][YARN] Remove akka dependency in
 secret key generation.

Use standard JDK APIs for that (with a little help from Guava). Most of the
changes here are in test code, since there were no tests specific to that
part of the code.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9257 from vanzin/SPARK-11073.
---
 .../org/apache/spark/SecurityManager.scala    | 72 +++++++++++--------
 .../apache/spark/SecurityManagerSuite.scala   | 23 +++++-
 .../spark/deploy/LogUrlsStandaloneSuite.scala | 13 +---
 .../deploy/worker/WorkerArgumentsTest.scala   | 28 +-------
 .../apache/spark/storage/LocalDirsSuite.scala | 16 +----
 .../apache/spark/util/SparkConfWithEnv.scala  | 34 +++++++++
 .../deploy/yarn/YarnSparkHadoopUtil.scala     |  3 +-
 .../yarn/YarnSparkHadoopUtilSuite.scala       | 32 ++++++++-
 8 files changed, 138 insertions(+), 83 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/util/SparkConfWithEnv.scala

diff --git a/core/src/main/scala/org/apache/spark/SecurityManager.scala b/core/src/main/scala/org/apache/spark/SecurityManager.scala
index 746d2081d439..64e483e38477 100644
--- a/core/src/main/scala/org/apache/spark/SecurityManager.scala
+++ b/core/src/main/scala/org/apache/spark/SecurityManager.scala
@@ -17,11 +17,13 @@
 
 package org.apache.spark
 
+import java.lang.{Byte => JByte}
 import java.net.{Authenticator, PasswordAuthentication}
-import java.security.KeyStore
+import java.security.{KeyStore, SecureRandom}
 import java.security.cert.X509Certificate
 import javax.net.ssl._
 
+import com.google.common.hash.HashCodes
 import com.google.common.io.Files
 import org.apache.hadoop.io.Text
 
@@ -130,15 +132,16 @@ import org.apache.spark.util.Utils
  *
  *  The exact mechanisms used to generate/distribute the shared secret are deployment-specific.
  *
- *  For Yarn deployments, the secret is automatically generated using the Akka remote
- *  Crypt.generateSecureCookie() API. The secret is placed in the Hadoop UGI which gets passed
- *  around via the Hadoop RPC mechanism. Hadoop RPC can be configured to support different levels
- *  of protection. See the Hadoop documentation for more details. Each Spark application on Yarn
- *  gets a different shared secret. On Yarn, the Spark UI gets configured to use the Hadoop Yarn
- *  AmIpFilter which requires the user to go through the ResourceManager Proxy. That Proxy is there
- *  to reduce the possibility of web based attacks through YARN. Hadoop can be configured to use
- *  filters to do authentication. That authentication then happens via the ResourceManager Proxy
- *  and Spark will use that to do authorization against the view acls.
+ *  For YARN deployments, the secret is automatically generated. The secret is placed in the Hadoop
+ *  UGI which gets passed around via the Hadoop RPC mechanism. Hadoop RPC can be configured to
+ *  support different levels of protection. See the Hadoop documentation for more details. Each
+ *  Spark application on YARN gets a different shared secret.
+ *
+ *  On YARN, the Spark UI gets configured to use the Hadoop YARN AmIpFilter which requires the user
+ *  to go through the ResourceManager Proxy. That proxy is there to reduce the possibility of web
+ *  based attacks through YARN. Hadoop can be configured to use filters to do authentication. That
+ *  authentication then happens via the ResourceManager Proxy and Spark will use that to do
+ *  authorization against the view acls.
  *
  *  For other Spark deployments, the shared secret must be specified via the
  *  spark.authenticate.secret config.
@@ -189,8 +192,7 @@ import org.apache.spark.util.Utils
 private[spark] class SecurityManager(sparkConf: SparkConf)
   extends Logging with SecretKeyHolder {
 
-  // key used to store the spark secret in the Hadoop UGI
-  private val sparkSecretLookupKey = "sparkCookie"
+  import SecurityManager._
 
   private val authOn = sparkConf.getBoolean(SecurityManager.SPARK_AUTH_CONF, false)
   // keep spark.ui.acls.enable for backwards compatibility with 1.0
@@ -365,33 +367,38 @@ private[spark] class SecurityManager(sparkConf: SparkConf)
    * we throw an exception.
    */
   private def generateSecretKey(): String = {
-    if (!isAuthenticationEnabled) return null
-    // first check to see if the secret is already set, else generate a new one if on yarn
-    val sCookie = if (SparkHadoopUtil.get.isYarnMode) {
-      val secretKey = SparkHadoopUtil.get.getSecretKeyFromUserCredentials(sparkSecretLookupKey)
-      if (secretKey != null) {
-        logDebug("in yarn mode, getting secret from credentials")
-        return new Text(secretKey).toString
+    if (!isAuthenticationEnabled) {
+      null
+    } else if (SparkHadoopUtil.get.isYarnMode) {
+      // In YARN mode, the secure cookie will be created by the driver and stashed in the
+      // user's credentials, where executors can get it. The check for an array of size 0
+      // is because of the test code in YarnSparkHadoopUtilSuite.
+      val secretKey = SparkHadoopUtil.get.getSecretKeyFromUserCredentials(SECRET_LOOKUP_KEY)
+      if (secretKey == null || secretKey.length == 0) {
+        logDebug("generateSecretKey: yarn mode, secret key from credentials is null")
+        val rnd = new SecureRandom()
+        val length = sparkConf.getInt("spark.authenticate.secretBitLength", 256) / JByte.SIZE
+        val secret = new Array[Byte](length)
+        rnd.nextBytes(secret)
+
+        val cookie = HashCodes.fromBytes(secret).toString()
+        SparkHadoopUtil.get.addSecretKeyToUserCredentials(SECRET_LOOKUP_KEY, cookie)
+        cookie
       } else {
-        logDebug("getSecretKey: yarn mode, secret key from credentials is null")
+        new Text(secretKey).toString
       }
-      val cookie = akka.util.Crypt.generateSecureCookie
-      // if we generated the secret then we must be the first so lets set it so t
-      // gets used by everyone else
-      SparkHadoopUtil.get.addSecretKeyToUserCredentials(sparkSecretLookupKey, cookie)
-      logInfo("adding secret to credentials in yarn mode")
-      cookie
     } else {
       // user must have set spark.authenticate.secret config
       // For Master/Worker, auth secret is in conf; for Executors, it is in env variable
-      sys.env.get(SecurityManager.ENV_AUTH_SECRET)
+      Option(sparkConf.getenv(SecurityManager.ENV_AUTH_SECRET))
         .orElse(sparkConf.getOption(SecurityManager.SPARK_AUTH_SECRET_CONF)) match {
         case Some(value) => value
-        case None => throw new Exception("Error: a secret key must be specified via the " +
-          SecurityManager.SPARK_AUTH_SECRET_CONF + " config")
+        case None =>
+          throw new IllegalArgumentException(
+            "Error: a secret key must be specified via the " +
+              SecurityManager.SPARK_AUTH_SECRET_CONF + " config")
       }
     }
-    sCookie
   }
 
   /**
@@ -475,6 +482,9 @@ private[spark] object SecurityManager {
   val SPARK_AUTH_CONF: String = "spark.authenticate"
   val SPARK_AUTH_SECRET_CONF: String = "spark.authenticate.secret"
   // This is used to set auth secret to an executor's env variable. It should have the same
-  // value as SPARK_AUTH_SECERET_CONF set in SparkConf
+  // value as SPARK_AUTH_SECRET_CONF set in SparkConf
   val ENV_AUTH_SECRET = "_SPARK_AUTH_SECRET"
+
+  // key used to store the spark secret in the Hadoop UGI
+  val SECRET_LOOKUP_KEY = "sparkCookie"
 }
diff --git a/core/src/test/scala/org/apache/spark/SecurityManagerSuite.scala b/core/src/test/scala/org/apache/spark/SecurityManagerSuite.scala
index f29160d83408..26b95c06789f 100644
--- a/core/src/test/scala/org/apache/spark/SecurityManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/SecurityManagerSuite.scala
@@ -19,7 +19,7 @@ package org.apache.spark
 
 import java.io.File
 
-import org.apache.spark.util.Utils
+import org.apache.spark.util.{SparkConfWithEnv, Utils}
 
 class SecurityManagerSuite extends SparkFunSuite {
 
@@ -223,5 +223,26 @@ class SecurityManagerSuite extends SparkFunSuite {
     assert(securityManager.hostnameVerifier.isDefined === false)
   }
 
+  test("missing secret authentication key") {
+    val conf = new SparkConf().set("spark.authenticate", "true")
+    intercept[IllegalArgumentException] {
+      new SecurityManager(conf)
+    }
+  }
+
+  test("secret authentication key") {
+    val key = "very secret key"
+    val conf = new SparkConf()
+      .set(SecurityManager.SPARK_AUTH_CONF, "true")
+      .set(SecurityManager.SPARK_AUTH_SECRET_CONF, key)
+    assert(key === new SecurityManager(conf).getSecretKey())
+
+    val keyFromEnv = "very secret key from env"
+    val conf2 = new SparkConfWithEnv(Map(SecurityManager.ENV_AUTH_SECRET -> keyFromEnv))
+      .set(SecurityManager.SPARK_AUTH_CONF, "true")
+      .set(SecurityManager.SPARK_AUTH_SECRET_CONF, key)
+    assert(keyFromEnv === new SecurityManager(conf2).getSecretKey())
+  }
+
 }
 
diff --git a/core/src/test/scala/org/apache/spark/deploy/LogUrlsStandaloneSuite.scala b/core/src/test/scala/org/apache/spark/deploy/LogUrlsStandaloneSuite.scala
index 86eb41dd7e5d..8dd31b4b6fdd 100644
--- a/core/src/test/scala/org/apache/spark/deploy/LogUrlsStandaloneSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/LogUrlsStandaloneSuite.scala
@@ -25,6 +25,7 @@ import scala.io.Source
 import org.apache.spark.scheduler.cluster.ExecutorInfo
 import org.apache.spark.scheduler.{SparkListenerExecutorAdded, SparkListener}
 import org.apache.spark.{LocalSparkContext, SparkConf, SparkContext, SparkFunSuite}
+import org.apache.spark.util.SparkConfWithEnv
 
 class LogUrlsStandaloneSuite extends SparkFunSuite with LocalSparkContext {
 
@@ -53,17 +54,7 @@ class LogUrlsStandaloneSuite extends SparkFunSuite with LocalSparkContext {
 
   test("verify that log urls reflect SPARK_PUBLIC_DNS (SPARK-6175)") {
     val SPARK_PUBLIC_DNS = "public_dns"
-    class MySparkConf extends SparkConf(false) {
-      override def getenv(name: String): String = {
-        if (name == "SPARK_PUBLIC_DNS") SPARK_PUBLIC_DNS
-        else super.getenv(name)
-      }
-
-      override def clone: SparkConf = {
-        new MySparkConf().setAll(getAll)
-      }
-    }
-    val conf = new MySparkConf().set(
+    val conf = new SparkConfWithEnv(Map("SPARK_PUBLIC_DNS" -> SPARK_PUBLIC_DNS)).set(
       "spark.extraListeners", classOf[SaveExecutorInfo].getName)
     sc = new SparkContext("local-cluster[2,1,1024]", "test", conf)
 
diff --git a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerArgumentsTest.scala b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerArgumentsTest.scala
index 15f7ca4a6dac..637e78fda019 100644
--- a/core/src/test/scala/org/apache/spark/deploy/worker/WorkerArgumentsTest.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/worker/WorkerArgumentsTest.scala
@@ -19,7 +19,7 @@
 package org.apache.spark.deploy.worker
 
 import org.apache.spark.{SparkConf, SparkFunSuite}
-
+import org.apache.spark.util.SparkConfWithEnv
 
 class WorkerArgumentsTest extends SparkFunSuite {
 
@@ -34,18 +34,7 @@ class WorkerArgumentsTest extends SparkFunSuite {
 
   test("Memory can't be set to 0 when SPARK_WORKER_MEMORY env property leaves off M or G") {
     val args = Array("spark://localhost:0000  ")
-
-    class MySparkConf extends SparkConf(false) {
-      override def getenv(name: String): String = {
-        if (name == "SPARK_WORKER_MEMORY") "50000"
-        else super.getenv(name)
-      }
-
-      override def clone: SparkConf = {
-        new MySparkConf().setAll(getAll)
-      }
-    }
-    val conf = new MySparkConf()
+    val conf = new SparkConfWithEnv(Map("SPARK_WORKER_MEMORY" -> "50000"))
     intercept[IllegalStateException] {
       new WorkerArguments(args, conf)
     }
@@ -53,18 +42,7 @@ class WorkerArgumentsTest extends SparkFunSuite {
 
   test("Memory correctly set when SPARK_WORKER_MEMORY env property appends G") {
     val args = Array("spark://localhost:0000  ")
-
-    class MySparkConf extends SparkConf(false) {
-      override def getenv(name: String): String = {
-        if (name == "SPARK_WORKER_MEMORY") "5G"
-        else super.getenv(name)
-      }
-
-      override def clone: SparkConf = {
-        new MySparkConf().setAll(getAll)
-      }
-    }
-    val conf = new MySparkConf()
+    val conf = new SparkConfWithEnv(Map("SPARK_WORKER_MEMORY" -> "5G"))
     val workerArgs = new WorkerArguments(args, conf)
     assert(workerArgs.memory === 5120)
   }
diff --git a/core/src/test/scala/org/apache/spark/storage/LocalDirsSuite.scala b/core/src/test/scala/org/apache/spark/storage/LocalDirsSuite.scala
index ac6fec56bbf4..cc50289c7b3e 100644
--- a/core/src/test/scala/org/apache/spark/storage/LocalDirsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/LocalDirsSuite.scala
@@ -23,7 +23,7 @@ import org.apache.spark.util.Utils
 import org.scalatest.BeforeAndAfter
 
 import org.apache.spark.{SparkConf, SparkFunSuite}
-
+import org.apache.spark.util.SparkConfWithEnv
 
 /**
  * Tests for the spark.local.dir and SPARK_LOCAL_DIRS configuration options.
@@ -45,20 +45,10 @@ class LocalDirsSuite extends SparkFunSuite with BeforeAndAfter {
   test("SPARK_LOCAL_DIRS override also affects driver") {
     // Regression test for SPARK-2975
     assert(!new File("/NONEXISTENT_DIR").exists())
-    // SPARK_LOCAL_DIRS is a valid directory:
-    class MySparkConf extends SparkConf(false) {
-      override def getenv(name: String): String = {
-        if (name == "SPARK_LOCAL_DIRS") System.getProperty("java.io.tmpdir")
-        else super.getenv(name)
-      }
-
-      override def clone: SparkConf = {
-        new MySparkConf().setAll(getAll)
-      }
-    }
     // spark.local.dir only contains invalid directories, but that's not a problem since
     // SPARK_LOCAL_DIRS will override it on both the driver and workers:
-    val conf = new MySparkConf().set("spark.local.dir", "/NONEXISTENT_PATH")
+    val conf = new SparkConfWithEnv(Map("SPARK_LOCAL_DIRS" -> System.getProperty("java.io.tmpdir")))
+      .set("spark.local.dir", "/NONEXISTENT_PATH")
     assert(new File(Utils.getLocalDir(conf)).exists())
   }
 
diff --git a/core/src/test/scala/org/apache/spark/util/SparkConfWithEnv.scala b/core/src/test/scala/org/apache/spark/util/SparkConfWithEnv.scala
new file mode 100644
index 000000000000..ddd5edf4f739
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/util/SparkConfWithEnv.scala
@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.util
+
+import org.apache.spark.SparkConf
+
+/**
+ * Customized SparkConf that allows env variables to be overridden.
+ */
+class SparkConfWithEnv(env: Map[String, String]) extends SparkConf(false) {
+  override def getenv(name: String): String = {
+    env.get(name).getOrElse(super.getenv(name))
+  }
+
+  override def clone: SparkConf = {
+    new SparkConfWithEnv(env).setAll(getAll)
+  }
+
+}
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
index 5924daf3ece4..561ad79ee022 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.deploy.yarn
 
 import java.io.File
+import java.nio.charset.StandardCharsets.UTF_8
 import java.util.regex.Matcher
 import java.util.regex.Pattern
 
@@ -81,7 +82,7 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
 
   override def addSecretKeyToUserCredentials(key: String, secret: String) {
     val creds = new Credentials()
-    creds.addSecretKey(new Text(key), secret.getBytes("utf-8"))
+    creds.addSecretKey(new Text(key), secret.getBytes(UTF_8))
     addCurrentUserCredentials(creds)
   }
 
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
index 9132c56a9175..a70e66d39a64 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtilSuite.scala
@@ -24,8 +24,10 @@ import com.google.common.io.{ByteStreams, Files}
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
 import org.apache.hadoop.hive.ql.metadata.HiveException
+import org.apache.hadoop.io.Text
 import org.apache.hadoop.yarn.api.ApplicationConstants
 import org.apache.hadoop.yarn.api.ApplicationConstants.Environment
+import org.apache.hadoop.security.{Credentials, UserGroupInformation}
 import org.apache.hadoop.yarn.conf.YarnConfiguration
 import org.scalatest.Matchers
 
@@ -263,7 +265,7 @@ class YarnSparkHadoopUtilSuite extends SparkFunSuite with Matchers with Logging
     })
   }
 
-  def assertNestedHiveException(e: InvocationTargetException): Throwable = {
+  private def assertNestedHiveException(e: InvocationTargetException): Throwable = {
     val inner = e.getCause
     if (inner == null) {
       fail("No inner cause", e)
@@ -274,4 +276,32 @@ class YarnSparkHadoopUtilSuite extends SparkFunSuite with Matchers with Logging
     inner
   }
 
+  // This test needs to live here because it depends on isYarnMode returning true, which can only
+  // happen in the YARN module.
+  test("security manager token generation") {
+    try {
+      System.setProperty("SPARK_YARN_MODE", "true")
+      val initial = SparkHadoopUtil.get
+        .getSecretKeyFromUserCredentials(SecurityManager.SECRET_LOOKUP_KEY)
+      assert(initial === null || initial.length === 0)
+
+      val conf = new SparkConf()
+        .set(SecurityManager.SPARK_AUTH_CONF, "true")
+        .set(SecurityManager.SPARK_AUTH_SECRET_CONF, "unused")
+      val sm = new SecurityManager(conf)
+
+      val generated = SparkHadoopUtil.get
+        .getSecretKeyFromUserCredentials(SecurityManager.SECRET_LOOKUP_KEY)
+      assert(generated != null)
+      val genString = new Text(generated).toString()
+      assert(genString != "unused")
+      assert(sm.getSecretKey() === genString)
+    } finally {
+      // removeSecretKey() was only added in Hadoop 2.6, so instead we just set the secret
+      // to an empty string.
+      SparkHadoopUtil.get.addSecretKeyToUserCredentials(SecurityManager.SECRET_LOOKUP_KEY, "")
+      System.clearProperty("SPARK_YARN_MODE")
+    }
+  }
+
 }

From 3e770a64a48c271c5829d2bcbdc1d6430cda2ac9 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Sun, 1 Nov 2015 18:37:27 -0800
Subject: [PATCH 436/896] [SPARK-9298][SQL] Add pearson correlation aggregation
 function

JIRA: https://issues.apache.org/jira/browse/SPARK-9298

This patch adds pearson correlation aggregation function based on `AggregateExpression2`.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8587 from viirya/corr_aggregation.
---
 .../catalyst/analysis/FunctionRegistry.scala  |   1 +
 .../expressions/aggregate/functions.scala     | 159 ++++++++++++++++++
 .../expressions/aggregate/utils.scala         |   6 +
 .../sql/catalyst/expressions/aggregates.scala |  18 ++
 .../org/apache/spark/sql/functions.scala      |  18 ++
 .../execution/HiveCompatibilitySuite.scala    |   7 +-
 .../execution/AggregationQuerySuite.scala     | 104 ++++++++++++
 7 files changed, 311 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index ed9fcfe014f0..5f3ec74ac0d9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -178,6 +178,7 @@ object FunctionRegistry {
 
     // aggregate functions
     expression[Average]("avg"),
+    expression[Corr]("corr"),
     expression[Count]("count"),
     expression[First]("first"),
     expression[First]("first_value"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 281404f285a9..5d2eb7b017ab 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -23,6 +23,7 @@ import java.util
 import com.clearspring.analytics.hash.MurmurHash
 
 import org.apache.spark.sql.AnalysisException
+import org.apache.spark.sql.catalyst._
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
@@ -524,6 +525,164 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
   override val evaluateExpression = Cast(currentSum, resultType)
 }
 
+/**
+ * Compute Pearson correlation between two expressions.
+ * When applied on empty data (i.e., count is zero), it returns NULL.
+ *
+ * Definition of Pearson correlation can be found at
+ * http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient
+ *
+ * @param left one of the expressions to compute correlation with.
+ * @param right another expression to compute correlation with.
+ */
+case class Corr(
+    left: Expression,
+    right: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends ImperativeAggregate {
+
+  def children: Seq[Expression] = Seq(left, right)
+
+  def nullable: Boolean = false
+
+  def dataType: DataType = DoubleType
+
+  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
+
+  def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
+
+  def inputAggBufferAttributes: Seq[AttributeReference] = aggBufferAttributes.map(_.newInstance())
+
+  val aggBufferAttributes: Seq[AttributeReference] = Seq(
+    AttributeReference("xAvg", DoubleType)(),
+    AttributeReference("yAvg", DoubleType)(),
+    AttributeReference("Ck", DoubleType)(),
+    AttributeReference("MkX", DoubleType)(),
+    AttributeReference("MkY", DoubleType)(),
+    AttributeReference("count", LongType)())
+
+  // Local cache of mutableAggBufferOffset(s) that will be used in update and merge
+  private[this] val mutableAggBufferOffsetPlus1 = mutableAggBufferOffset + 1
+  private[this] val mutableAggBufferOffsetPlus2 = mutableAggBufferOffset + 2
+  private[this] val mutableAggBufferOffsetPlus3 = mutableAggBufferOffset + 3
+  private[this] val mutableAggBufferOffsetPlus4 = mutableAggBufferOffset + 4
+  private[this] val mutableAggBufferOffsetPlus5 = mutableAggBufferOffset + 5
+
+  // Local cache of inputAggBufferOffset(s) that will be used in update and merge
+  private[this] val inputAggBufferOffsetPlus1 = inputAggBufferOffset + 1
+  private[this] val inputAggBufferOffsetPlus2 = inputAggBufferOffset + 2
+  private[this] val inputAggBufferOffsetPlus3 = inputAggBufferOffset + 3
+  private[this] val inputAggBufferOffsetPlus4 = inputAggBufferOffset + 4
+  private[this] val inputAggBufferOffsetPlus5 = inputAggBufferOffset + 5
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def initialize(buffer: MutableRow): Unit = {
+    buffer.setDouble(mutableAggBufferOffset, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus1, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus2, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus3, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus4, 0.0)
+    buffer.setLong(mutableAggBufferOffsetPlus5, 0L)
+  }
+
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val leftEval = left.eval(input)
+    val rightEval = right.eval(input)
+
+    if (leftEval != null && rightEval != null) {
+      val x = leftEval.asInstanceOf[Double]
+      val y = rightEval.asInstanceOf[Double]
+
+      var xAvg = buffer.getDouble(mutableAggBufferOffset)
+      var yAvg = buffer.getDouble(mutableAggBufferOffsetPlus1)
+      var Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
+      var MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
+      var MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
+      var count = buffer.getLong(mutableAggBufferOffsetPlus5)
+
+      val deltaX = x - xAvg
+      val deltaY = y - yAvg
+      count += 1
+      xAvg += deltaX / count
+      yAvg += deltaY / count
+      Ck += deltaX * (y - yAvg)
+      MkX += deltaX * (x - xAvg)
+      MkY += deltaY * (y - yAvg)
+
+      buffer.setDouble(mutableAggBufferOffset, xAvg)
+      buffer.setDouble(mutableAggBufferOffsetPlus1, yAvg)
+      buffer.setDouble(mutableAggBufferOffsetPlus2, Ck)
+      buffer.setDouble(mutableAggBufferOffsetPlus3, MkX)
+      buffer.setDouble(mutableAggBufferOffsetPlus4, MkY)
+      buffer.setLong(mutableAggBufferOffsetPlus5, count)
+    }
+  }
+
+  // Merge counters from other partitions. Formula can be found at:
+  // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    val count2 = buffer2.getLong(inputAggBufferOffsetPlus5)
+
+    // We only go to merge two buffers if there is at least one record aggregated in buffer2.
+    // We don't need to check count in buffer1 because if count2 is more than zero, totalCount
+    // is more than zero too, then we won't get a divide by zero exception.
+    if (count2 > 0) {
+      var xAvg = buffer1.getDouble(mutableAggBufferOffset)
+      var yAvg = buffer1.getDouble(mutableAggBufferOffsetPlus1)
+      var Ck = buffer1.getDouble(mutableAggBufferOffsetPlus2)
+      var MkX = buffer1.getDouble(mutableAggBufferOffsetPlus3)
+      var MkY = buffer1.getDouble(mutableAggBufferOffsetPlus4)
+      var count = buffer1.getLong(mutableAggBufferOffsetPlus5)
+
+      val xAvg2 = buffer2.getDouble(inputAggBufferOffset)
+      val yAvg2 = buffer2.getDouble(inputAggBufferOffsetPlus1)
+      val Ck2 = buffer2.getDouble(inputAggBufferOffsetPlus2)
+      val MkX2 = buffer2.getDouble(inputAggBufferOffsetPlus3)
+      val MkY2 = buffer2.getDouble(inputAggBufferOffsetPlus4)
+
+      val totalCount = count + count2
+      val deltaX = xAvg - xAvg2
+      val deltaY = yAvg - yAvg2
+      Ck += Ck2 + deltaX * deltaY * count / totalCount * count2
+      xAvg = (xAvg * count + xAvg2 * count2) / totalCount
+      yAvg = (yAvg * count + yAvg2 * count2) / totalCount
+      MkX += MkX2 + deltaX * deltaX * count / totalCount * count2
+      MkY += MkY2 + deltaY * deltaY * count / totalCount * count2
+      count = totalCount
+
+      buffer1.setDouble(mutableAggBufferOffset, xAvg)
+      buffer1.setDouble(mutableAggBufferOffsetPlus1, yAvg)
+      buffer1.setDouble(mutableAggBufferOffsetPlus2, Ck)
+      buffer1.setDouble(mutableAggBufferOffsetPlus3, MkX)
+      buffer1.setDouble(mutableAggBufferOffsetPlus4, MkY)
+      buffer1.setLong(mutableAggBufferOffsetPlus5, count)
+    }
+  }
+
+  override def eval(buffer: InternalRow): Any = {
+    val count = buffer.getLong(mutableAggBufferOffsetPlus5)
+    if (count > 0) {
+      val Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
+      val MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
+      val MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
+      val corr = Ck / math.sqrt(MkX * MkY)
+      if (corr.isNaN) {
+        null
+      } else {
+        corr
+      }
+    } else {
+      null
+    }
+  }
+}
+
 // scalastyle:off
 /**
  * HyperLogLog++ (HLL++) is a state of the art cardinality estimation algorithm. This class
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
index c911ec53f1ba..564174f9b64e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
@@ -127,6 +127,12 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = true)
 
+        case expressions.Corr(left, right) =>
+          aggregate.AggregateExpression2(
+            aggregateFunction = aggregate.Corr(left, right),
+            mode = aggregate.Complete,
+            isDistinct = false)
+
         case expressions.ApproxCountDistinct(child, rsd) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.HyperLogLogPlusPlus(child, rsd),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index c1bab6d36ab2..bf59660c385e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -747,6 +747,24 @@ case class LastFunction(
   }
 }
 
+/**
+ * Calculate Pearson Correlation Coefficient for the given columns.
+ * Only support AggregateExpression2.
+ *
+ */
+case class Corr(left: Expression, right: Expression)
+    extends BinaryExpression with AggregateExpression1 with ImplicitCastInputTypes {
+  override def nullable: Boolean = false
+  override def dataType: DoubleType.type = DoubleType
+  override def toString: String = s"CORRELATION($left, $right)"
+  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
+  override def newInstance(): AggregateFunction1 = {
+    throw new UnsupportedOperationException(
+      "Corr only supports the new AggregateExpression2 and can only be used " +
+        "when spark.sql.useAggregate2 = true")
+  }
+}
+
 // Compute standard deviation based on online algorithm specified here:
 // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 abstract class StddevAgg1(child: Expression) extends UnaryExpression with PartialAggregate1 {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index c1737b1ef663..5a5c695e6ab3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -172,6 +172,24 @@ object functions {
    */
   def avg(columnName: String): Column = avg(Column(columnName))
 
+  /**
+   * Aggregate function: returns the Pearson Correlation Coefficient for two columns.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def corr(column1: Column, column2: Column): Column =
+    Corr(column1.expr, column2.expr)
+
+  /**
+   * Aggregate function: returns the Pearson Correlation Coefficient for two columns.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def corr(columnName1: String, columnName2: String): Column =
+    corr(Column(columnName1), Column(columnName2))
+
   /**
    * Aggregate function: returns the number of items in a group.
    *
diff --git a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
index 9e357bf348c9..6ed40b03975d 100644
--- a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
+++ b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
@@ -304,7 +304,11 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
 
     // classpath problems
     "compute_stats.*",
-    "udf_bitmap_.*"
+    "udf_bitmap_.*",
+
+    // The difference between the double numbers generated by Hive and Spark
+    // can be ignored (e.g., 0.6633880657639323 and 0.6633880657639322)
+    "udaf_corr"
   )
 
   /**
@@ -857,7 +861,6 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
     "type_cast_1",
     "type_widening",
     "udaf_collect_set",
-    "udaf_corr",
     "udaf_covar_pop",
     "udaf_covar_samp",
     "udaf_histogram_numeric",
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index f38a3f63c3b5..0cf0e0aab9eb 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.hive.execution
 
 import scala.collection.JavaConverters._
 
+import org.apache.spark.SparkException
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow
 import org.apache.spark.sql.execution.aggregate
@@ -556,6 +557,109 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         Row(0, null, 1, 1, null, 0) :: Nil)
   }
 
+  test("pearson correlation") {
+    val df = Seq.tabulate(10)(i => (1.0 * i, 2.0 * i, i * -1.0)).toDF("a", "b", "c")
+    val corr1 = df.repartition(2).groupBy().agg(corr("a", "b")).collect()(0).getDouble(0)
+    assert(math.abs(corr1 - 1.0) < 1e-12)
+    val corr2 = df.groupBy().agg(corr("a", "c")).collect()(0).getDouble(0)
+    assert(math.abs(corr2 + 1.0) < 1e-12)
+    // non-trivial example. To reproduce in python, use:
+    // >>> from scipy.stats import pearsonr
+    // >>> import numpy as np
+    // >>> a = np.array(range(20))
+    // >>> b = np.array([x * x - 2 * x + 3.5 for x in range(20)])
+    // >>> pearsonr(a, b)
+    // (0.95723391394758572, 3.8902121417802199e-11)
+    // In R, use:
+    // > a <- 0:19
+    // > b <- mapply(function(x) x * x - 2 * x + 3.5, a)
+    // > cor(a, b)
+    // [1] 0.957233913947585835
+    val df2 = Seq.tabulate(20)(x => (1.0 * x, x * x - 2 * x + 3.5)).toDF("a", "b")
+    val corr3 = df2.groupBy().agg(corr("a", "b")).collect()(0).getDouble(0)
+    assert(math.abs(corr3 - 0.95723391394758572) < 1e-12)
+
+    val df3 = Seq.tabulate(0)(i => (1.0 * i, 2.0 * i)).toDF("a", "b")
+    val corr4 = df3.groupBy().agg(corr("a", "b")).collect()(0)
+    assert(corr4 == Row(null))
+
+    val df4 = Seq.tabulate(10)(i => (1 * i, 2 * i, i * -1)).toDF("a", "b", "c")
+    val corr5 = df4.repartition(2).groupBy().agg(corr("a", "b")).collect()(0).getDouble(0)
+    assert(math.abs(corr5 - 1.0) < 1e-12)
+    val corr6 = df4.groupBy().agg(corr("a", "c")).collect()(0).getDouble(0)
+    assert(math.abs(corr6 + 1.0) < 1e-12)
+
+    // Test for udaf_corr in HiveCompatibilitySuite
+    // udaf_corr has been blacklisted due to numerical errors
+    // We test it here:
+    // SELECT corr(b, c) FROM covar_tab WHERE a < 1; => NULL
+    // SELECT corr(b, c) FROM covar_tab WHERE a < 3; => NULL
+    // SELECT corr(b, c) FROM covar_tab WHERE a = 3; => NULL
+    // SELECT a, corr(b, c) FROM covar_tab GROUP BY a ORDER BY a; =>
+    // 1       NULL
+    // 2       NULL
+    // 3       NULL
+    // 4       NULL
+    // 5       NULL
+    // 6       NULL
+    // SELECT corr(b, c) FROM covar_tab; => 0.6633880657639323
+
+    val covar_tab = Seq[(Integer, Integer, Integer)](
+      (1, null, 15),
+      (2, 3, null),
+      (3, 7, 12),
+      (4, 4, 14),
+      (5, 8, 17),
+      (6, 2, 11)).toDF("a", "b", "c")
+
+    covar_tab.registerTempTable("covar_tab")
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT corr(b, c) FROM covar_tab WHERE a < 1
+        """.stripMargin),
+      Row(null) :: Nil)
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT corr(b, c) FROM covar_tab WHERE a < 3
+        """.stripMargin),
+      Row(null) :: Nil)
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT corr(b, c) FROM covar_tab WHERE a = 3
+        """.stripMargin),
+      Row(null) :: Nil)
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT a, corr(b, c) FROM covar_tab GROUP BY a ORDER BY a
+        """.stripMargin),
+      Row(1, null) ::
+      Row(2, null) ::
+      Row(3, null) ::
+      Row(4, null) ::
+      Row(5, null) ::
+      Row(6, null) :: Nil)
+
+    val corr7 = sqlContext.sql("SELECT corr(b, c) FROM covar_tab").collect()(0).getDouble(0)
+    assert(math.abs(corr7 - 0.6633880657639323) < 1e-12)
+
+    withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "false") {
+      val errorMessage = intercept[SparkException] {
+        val df = Seq.tabulate(10)(i => (1.0 * i, 2.0 * i, i * -1.0)).toDF("a", "b", "c")
+        val corr1 = df.repartition(2).groupBy().agg(corr("a", "b")).collect()(0).getDouble(0)
+      }.getMessage
+      assert(errorMessage.contains("java.lang.UnsupportedOperationException: " +
+        "Corr only supports the new AggregateExpression2"))
+    }
+  }
+
   test("test Last implemented based on AggregateExpression1") {
     // TODO: Remove this test once we remove AggregateExpression1.
     import org.apache.spark.sql.functions._

From e963070c13f56fbc2dfaf9f5d4e69d34afd0957c Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Sun, 1 Nov 2015 23:52:50 -0800
Subject: [PATCH 437/896] [SPARK-9722] [ML] Pass random seed to spark.ml
 DecisionTree*

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #9402 from yu-iskw/SPARK-9722.
---
 .../org/apache/spark/ml/tree/impl/RandomForest.scala      | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
index 96d5652857e0..4a3b12d1440b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/impl/RandomForest.scala
@@ -74,7 +74,7 @@ private[ml] object RandomForest extends Logging {
     // Find the splits and the corresponding bins (interval between the splits) using a sample
     // of the input data.
     timer.start("findSplitsBins")
-    val splits = findSplits(retaggedInput, metadata)
+    val splits = findSplits(retaggedInput, metadata, seed)
     timer.stop("findSplitsBins")
     logDebug("numBins: feature: number of bins")
     logDebug(Range(0, metadata.numFeatures).map { featureIndex =>
@@ -815,6 +815,7 @@ private[ml] object RandomForest extends Logging {
    *
    * @param input Training data: RDD of [[org.apache.spark.mllib.regression.LabeledPoint]]
    * @param metadata Learning and dataset metadata
+   * @param seed random seed
    * @return A tuple of (splits, bins).
    *         Splits is an Array of [[org.apache.spark.mllib.tree.model.Split]]
    *          of size (numFeatures, numSplits).
@@ -823,7 +824,8 @@ private[ml] object RandomForest extends Logging {
    */
   protected[tree] def findSplits(
       input: RDD[LabeledPoint],
-      metadata: DecisionTreeMetadata): Array[Array[Split]] = {
+      metadata: DecisionTreeMetadata,
+      seed : Long): Array[Array[Split]] = {
 
     logDebug("isMulticlass = " + metadata.isMulticlass)
 
@@ -840,7 +842,7 @@ private[ml] object RandomForest extends Logging {
         1.0
       }
       logDebug("fraction of data used for calculating quantiles = " + fraction)
-      input.sample(withReplacement = false, fraction, new XORShiftRandom(1).nextInt()).collect()
+      input.sample(withReplacement = false, fraction, new XORShiftRandom(seed).nextInt()).collect()
     } else {
       new Array[LabeledPoint](0)
     }

From e209fa271ae57dc8849f8b1241bf1ea7d6d3d62c Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 2 Nov 2015 08:52:52 +0000
Subject: [PATCH 438/896] [SPARK-11271][SPARK-11016][CORE] Use Spark BitSet
 instead of RoaringBitmap to reduce memory usage

JIRA: https://issues.apache.org/jira/browse/SPARK-11271

As reported in the JIRA ticket, when there are too many tasks, the memory usage of MapStatus will cause problem. Use BitSet instead of RoaringBitMap should be more efficient in memory usage.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9243 from viirya/mapstatus-bitset.
---
 core/pom.xml                                  |  4 --
 .../apache/spark/scheduler/MapStatus.scala    | 13 +++--
 .../spark/serializer/KryoSerializer.scala     | 10 +---
 .../apache/spark/util/collection/BitSet.scala | 28 +++++++++--
 .../serializer/KryoSerializerSuite.scala      |  6 ---
 .../spark/util/collection/BitSetSuite.scala   | 49 +++++++++++++++++++
 pom.xml                                       |  5 --
 7 files changed, 82 insertions(+), 33 deletions(-)

diff --git a/core/pom.xml b/core/pom.xml
index 319a50049a82..1b6b13517bd5 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -173,10 +173,6 @@
       <groupId>net.jpountz.lz4</groupId>
       <artifactId>lz4</artifactId>
     </dependency>
-    <dependency>
-      <groupId>org.roaringbitmap</groupId>
-      <artifactId>RoaringBitmap</artifactId>
-    </dependency>
     <dependency>
       <groupId>commons-net</groupId>
       <artifactId>commons-net</artifactId>
diff --git a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
index 1efce124c0a6..180c8d1827e1 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
@@ -19,9 +19,8 @@ package org.apache.spark.scheduler
 
 import java.io.{Externalizable, ObjectInput, ObjectOutput}
 
-import org.roaringbitmap.RoaringBitmap
-
 import org.apache.spark.storage.BlockManagerId
+import org.apache.spark.util.collection.BitSet
 import org.apache.spark.util.Utils
 
 /**
@@ -133,7 +132,7 @@ private[spark] class CompressedMapStatus(
 private[spark] class HighlyCompressedMapStatus private (
     private[this] var loc: BlockManagerId,
     private[this] var numNonEmptyBlocks: Int,
-    private[this] var emptyBlocks: RoaringBitmap,
+    private[this] var emptyBlocks: BitSet,
     private[this] var avgSize: Long)
   extends MapStatus with Externalizable {
 
@@ -146,7 +145,7 @@ private[spark] class HighlyCompressedMapStatus private (
   override def location: BlockManagerId = loc
 
   override def getSizeForBlock(reduceId: Int): Long = {
-    if (emptyBlocks.contains(reduceId)) {
+    if (emptyBlocks.get(reduceId)) {
       0
     } else {
       avgSize
@@ -161,7 +160,7 @@ private[spark] class HighlyCompressedMapStatus private (
 
   override def readExternal(in: ObjectInput): Unit = Utils.tryOrIOException {
     loc = BlockManagerId(in)
-    emptyBlocks = new RoaringBitmap()
+    emptyBlocks = new BitSet
     emptyBlocks.readExternal(in)
     avgSize = in.readLong()
   }
@@ -177,15 +176,15 @@ private[spark] object HighlyCompressedMapStatus {
     // From a compression standpoint, it shouldn't matter whether we track empty or non-empty
     // blocks. From a performance standpoint, we benefit from tracking empty blocks because
     // we expect that there will be far fewer of them, so we will perform fewer bitmap insertions.
-    val emptyBlocks = new RoaringBitmap()
     val totalNumBlocks = uncompressedSizes.length
+    val emptyBlocks = new BitSet(totalNumBlocks)
     while (i < totalNumBlocks) {
       var size = uncompressedSizes(i)
       if (size > 0) {
         numNonEmptyBlocks += 1
         totalSize += size
       } else {
-        emptyBlocks.add(i)
+        emptyBlocks.set(i)
       }
       i += 1
     }
diff --git a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
index c5195c1143a8..bc51d4f2820c 100644
--- a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
+++ b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
@@ -30,7 +30,6 @@ import com.esotericsoftware.kryo.io.{Input => KryoInput, Output => KryoOutput}
 import com.esotericsoftware.kryo.serializers.{JavaSerializer => KryoJavaSerializer}
 import com.twitter.chill.{AllScalaRegistrar, EmptyScalaKryoInstantiator}
 import org.apache.avro.generic.{GenericData, GenericRecord}
-import org.roaringbitmap.{ArrayContainer, BitmapContainer, RoaringArray, RoaringBitmap}
 
 import org.apache.spark._
 import org.apache.spark.api.python.PythonBroadcast
@@ -39,7 +38,7 @@ import org.apache.spark.network.util.ByteUnit
 import org.apache.spark.scheduler.{CompressedMapStatus, HighlyCompressedMapStatus}
 import org.apache.spark.storage._
 import org.apache.spark.util.{Utils, BoundedPriorityQueue, SerializableConfiguration, SerializableJobConf}
-import org.apache.spark.util.collection.CompactBuffer
+import org.apache.spark.util.collection.{BitSet, CompactBuffer}
 
 /**
  * A Spark serializer that uses the [[https://code.google.com/p/kryo/ Kryo serialization library]].
@@ -363,12 +362,7 @@ private[serializer] object KryoSerializer {
     classOf[StorageLevel],
     classOf[CompressedMapStatus],
     classOf[HighlyCompressedMapStatus],
-    classOf[RoaringBitmap],
-    classOf[RoaringArray],
-    classOf[RoaringArray.Element],
-    classOf[Array[RoaringArray.Element]],
-    classOf[ArrayContainer],
-    classOf[BitmapContainer],
+    classOf[BitSet],
     classOf[CompactBuffer[_]],
     classOf[BlockManagerId],
     classOf[Array[Byte]],
diff --git a/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala b/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
index 7ab67fc3a2de..85c5bdbfcebc 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
@@ -17,14 +17,21 @@
 
 package org.apache.spark.util.collection
 
+import java.io.{Externalizable, ObjectInput, ObjectOutput}
+
+import org.apache.spark.util.{Utils => UUtils}
+
+
 /**
  * A simple, fixed-size bit set implementation. This implementation is fast because it avoids
  * safety/bound checking.
  */
-class BitSet(numBits: Int) extends Serializable {
+class BitSet(private[this] var numBits: Int) extends Externalizable {
 
-  private val words = new Array[Long](bit2words(numBits))
-  private val numWords = words.length
+  private var words = new Array[Long](bit2words(numBits))
+  private def numWords = words.length
+
+  def this() = this(0)
 
   /**
    * Compute the capacity (number of bits) that can be represented
@@ -230,4 +237,19 @@ class BitSet(numBits: Int) extends Serializable {
 
   /** Return the number of longs it would take to hold numBits. */
   private def bit2words(numBits: Int) = ((numBits - 1) >> 6) + 1
+
+  override def writeExternal(out: ObjectOutput): Unit = UUtils.tryOrIOException {
+    out.writeInt(numBits)
+    words.foreach(out.writeLong(_))
+  }
+
+  override def readExternal(in: ObjectInput): Unit = UUtils.tryOrIOException {
+    numBits = in.readInt()
+    words = new Array[Long](bit2words(numBits))
+    var index = 0
+    while (index < words.length) {
+      words(index) = in.readLong()
+      index += 1
+    }
+  }
 }
diff --git a/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala b/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
index e428414cf6e8..afe2e80358ca 100644
--- a/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
@@ -322,12 +322,6 @@ class KryoSerializerSuite extends SparkFunSuite with SharedSparkContext {
     val conf = new SparkConf(false)
     conf.set("spark.kryo.registrationRequired", "true")
 
-    // these cases require knowing the internals of RoaringBitmap a little.  Blocks span 2^16
-    // values, and they use a bitmap (dense) if they have more than 4096 values, and an
-    // array (sparse) if they use less.  So we just create two cases, one sparse and one dense.
-    // and we use a roaring bitmap for the empty blocks, so we trigger the dense case w/ mostly
-    // empty blocks
-
     val ser = new KryoSerializer(conf).newInstance()
     val denseBlockSizes = new Array[Long](5000)
     val sparseBlockSizes = Array[Long](0L, 1L, 0L, 2L)
diff --git a/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
index 69dbfa9cd714..b0db0988eeaa 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
@@ -17,7 +17,10 @@
 
 package org.apache.spark.util.collection
 
+import java.io.{File, FileInputStream, FileOutputStream, ObjectInputStream, ObjectOutputStream}
+
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.util.{Utils => UUtils}
 
 class BitSetSuite extends SparkFunSuite {
 
@@ -152,4 +155,50 @@ class BitSetSuite extends SparkFunSuite {
     assert(bitsetDiff.nextSetBit(85) === 85)
     assert(bitsetDiff.nextSetBit(86) === -1)
   }
+
+  test("read and write externally") {
+    val tempDir = UUtils.createTempDir()
+    val outputFile = File.createTempFile("bits", null, tempDir)
+
+    val fos = new FileOutputStream(outputFile)
+    val oos = new ObjectOutputStream(fos)
+
+    // Create BitSet
+    val setBits = Seq(0, 9, 1, 10, 90, 96)
+    val bitset = new BitSet(100)
+
+    for (i <- 0 until 100) {
+      assert(!bitset.get(i))
+    }
+
+    setBits.foreach(i => bitset.set(i))
+
+    for (i <- 0 until 100) {
+      if (setBits.contains(i)) {
+        assert(bitset.get(i))
+      } else {
+        assert(!bitset.get(i))
+      }
+    }
+    assert(bitset.cardinality() === setBits.size)
+
+    bitset.writeExternal(oos)
+    oos.close()
+
+    val fis = new FileInputStream(outputFile)
+    val ois = new ObjectInputStream(fis)
+
+    // Read BitSet from the file
+    val bitset2 = new BitSet(0)
+    bitset2.readExternal(ois)
+
+    for (i <- 0 until 100) {
+      if (setBits.contains(i)) {
+        assert(bitset2.get(i))
+      } else {
+        assert(!bitset2.get(i))
+      }
+    }
+    assert(bitset2.cardinality() === setBits.size)
+  }
 }
diff --git a/pom.xml b/pom.xml
index 3dfc434fb553..50c8f29cdbcd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -623,11 +623,6 @@
           </exclusion>
         </exclusions>
       </dependency>
-      <dependency>
-        <groupId>org.roaringbitmap</groupId>
-        <artifactId>RoaringBitmap</artifactId>
-        <version>0.4.5</version>
-      </dependency>
       <dependency>
         <groupId>commons-net</groupId>
         <artifactId>commons-net</artifactId>

From ea4a3e7d06dd4a0f669460513b27469c468214fb Mon Sep 17 00:00:00 2001
From: Yongjia Wang <yongjiaw@gmail.com>
Date: Mon, 2 Nov 2015 08:59:35 +0000
Subject: [PATCH 439/896] [SPARK-11413][BUILD] Bump joda-time version to 2.9
 for java 8 and s3

It's a known issue that joda-time before 2.8.1 is incompatible with java 1.8u60 or later, which causes s3 request to fail. This affects Spark when using s3 as data source.
https://github.com/aws/aws-sdk-java/issues/444

Author: Yongjia Wang <yongjiaw@gmail.com>

Closes #9379 from yongjiaw/SPARK-11413.
---
 pom.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pom.xml b/pom.xml
index 50c8f29cdbcd..762bfc728233 100644
--- a/pom.xml
+++ b/pom.xml
@@ -176,7 +176,7 @@
     <datanucleus-core.version>3.2.10</datanucleus-core.version>
     <janino.version>2.7.8</janino.version>
     <jersey.version>1.9</jersey.version>
-    <joda.version>2.5</joda.version>
+    <joda.version>2.9</joda.version>
     <jodd.version>3.5.2</jodd.version>
     <jsr305.version>1.3.9</jsr305.version>
     <libthrift.version>0.9.2</libthrift.version>

From 767522dc4e66dd26773d41d1576945187180d2b9 Mon Sep 17 00:00:00 2001
From: huangzhaowei <carlmartinmax@gmail.com>
Date: Mon, 2 Nov 2015 21:31:10 +0800
Subject: [PATCH 440/896] [SPARK-10786][SQL] Take the whole statement to
 generate the CommandProcessor

In the now implementation of `SparkSQLCLIDriver.scala`:
`val proc: CommandProcessor = CommandProcessorFactory.get(Array(tokens(0)), hconf)`
`CommandProcessorFactory` only take the first token of the statement, and this will be hard to diff the statement `delete jar xxx` and `delete from xxx`.
So maybe it's better to take the whole statement into the `CommandProcessorFactory`.

And in [HiveCommand](https://github.com/SaintBacchus/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/processors/HiveCommand.java#L76), it already special handing these two statement.
```java
if(command.length > 1 && "from".equalsIgnoreCase(command[1])) {
  //special handling for SQL "delete from <table> where..."
  return null;
}
```

Author: huangzhaowei <carlmartinmax@gmail.com>

Closes #8895 from SaintBacchus/SPARK-10786.
---
 .../apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
index 62e912c69abc..6419002a2aa8 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
@@ -290,7 +290,7 @@ private[hive] class SparkSQLCLIDriver extends CliDriver with Logging {
     } else {
       var ret = 0
       val hconf = conf.asInstanceOf[HiveConf]
-      val proc: CommandProcessor = CommandProcessorFactory.get(Array(tokens(0)), hconf)
+      val proc: CommandProcessor = CommandProcessorFactory.get(tokens, hconf)
 
       if (proc != null) {
         // scalastyle:off println

From 74ba95228d71a6dc4e95fef19f41dabe7c363d9e Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Mon, 2 Nov 2015 23:07:30 +0800
Subject: [PATCH 441/896] [SPARK-11311][SQL] spark cannot describe temporary
 functions

When describe temporary function, spark would return 'Unable to find function', this is not right.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #9277 from adrian-wang/functionreg.
---
 .../scala/org/apache/spark/sql/hive/hiveUDFs.scala     |  6 +++++-
 .../spark/sql/hive/execution/HiveQuerySuite.scala      | 10 ++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index 2ccad474b4f7..0b5e86350614 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -119,7 +119,11 @@ private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
           annotation.value(),
           annotation.extended()))
       } else {
-        None
+        Some(new ExpressionInfo(
+          info.getFunctionClass.getCanonicalName,
+          name,
+          null,
+          null))
       }
     }.getOrElse(None))
   }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index b52f7d4b5789..e597d6865f67 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -953,6 +953,16 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
     sql("DROP TABLE t1")
   }
 
+  test("CREATE TEMPORARY FUNCTION") {
+    val funcJar = TestHive.getHiveFile("TestUDTF.jar").getCanonicalPath
+    sql(s"ADD JAR $funcJar")
+    sql(
+      """CREATE TEMPORARY FUNCTION udtf_count2 AS
+        | 'org.apache.spark.sql.hive.execution.GenericUDTFCount2'""".stripMargin)
+    assert(sql("DESCRIBE FUNCTION udtf_count2").count > 1)
+    sql("DROP TEMPORARY FUNCTION udtf_count2")
+  }
+
   test("ADD FILE command") {
     val testFile = TestHive.getHiveFile("data/files/v1.txt").getCanonicalFile
     sql(s"ADD FILE $testFile")

From a930e624eb9feb0f7d37d99dcb8178feb9c0f177 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 2 Nov 2015 10:23:30 -0800
Subject: [PATCH 442/896] [SPARK-9817][YARN] Improve the locality calculation
 of containers by taking pending container requests into consideraion

This is a follow-up PR to further improve the locality calculation by considering the pending container's request. Since the locality preferences of tasks may be shifted from time to time, current localities of pending container requests may not fully match the new preferences, this PR improve it by removing outdated, unmatched container requests and replace with new requests.

sryza please help to review, thanks a lot.

Author: jerryshao <sshao@hortonworks.com>

Closes #8100 from jerryshao/SPARK-9817.
---
 .../spark/deploy/yarn/ApplicationMaster.scala |  2 +-
 ...yPreferredContainerPlacementStrategy.scala | 60 +++++++++++++--
 .../spark/deploy/yarn/YarnAllocator.scala     | 73 +++++++++++++++----
 .../ContainerPlacementStrategySuite.scala     | 38 ++++++++--
 .../deploy/yarn/YarnAllocatorSuite.scala      | 26 +++----
 5 files changed, 159 insertions(+), 40 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 4b4d9990ce9f..c6a6d7ac56bf 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -375,7 +375,7 @@ private[spark] class ApplicationMaster(
             }
           }
           try {
-            val numPendingAllocate = allocator.getNumPendingAllocate
+            val numPendingAllocate = allocator.getPendingAllocate.size
             val sleepInterval =
               if (numPendingAllocate > 0) {
                 val currentAllocationInterval =
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/LocalityPreferredContainerPlacementStrategy.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/LocalityPreferredContainerPlacementStrategy.scala
index 081780204e42..2ec189de7c91 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/LocalityPreferredContainerPlacementStrategy.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/LocalityPreferredContainerPlacementStrategy.scala
@@ -18,9 +18,11 @@
 package org.apache.spark.deploy.yarn
 
 import scala.collection.mutable.{ArrayBuffer, HashMap, Set}
+import scala.collection.JavaConverters._
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.yarn.api.records.{ContainerId, Resource}
+import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest
 import org.apache.hadoop.yarn.util.RackResolver
 
 import org.apache.spark.SparkConf
@@ -30,8 +32,8 @@ private[yarn] case class ContainerLocalityPreferences(nodes: Array[String], rack
 /**
  * This strategy is calculating the optimal locality preferences of YARN containers by considering
  * the node ratio of pending tasks, number of required cores/containers and and locality of current
- * existing containers. The target of this algorithm is to maximize the number of tasks that
- * would run locally.
+ * existing and pending allocated containers. The target of this algorithm is to maximize the number
+ * of tasks that would run locally.
  *
  * Consider a situation in which we have 20 tasks that require (host1, host2, host3)
  * and 10 tasks that require (host1, host2, host4), besides each container has 2 cores
@@ -91,6 +93,11 @@ private[yarn] class LocalityPreferredContainerPlacementStrategy(
    * @param numLocalityAwareTasks number of locality required tasks
    * @param hostToLocalTaskCount a map to store the preferred hostname and possible task
    *                             numbers running on it, used as hints for container allocation
+   * @param allocatedHostToContainersMap host to allocated containers map, used to calculate the
+   *                                     expected locality preference by considering the existing
+   *                                     containers
+   * @param localityMatchedPendingAllocations A sequence of pending container request which
+   *                                          matches the localities of current required tasks.
    * @return node localities and rack localities, each locality is an array of string,
    *         the length of localities is the same as number of containers
    */
@@ -98,10 +105,12 @@ private[yarn] class LocalityPreferredContainerPlacementStrategy(
       numContainer: Int,
       numLocalityAwareTasks: Int,
       hostToLocalTaskCount: Map[String, Int],
-      allocatedHostToContainersMap: HashMap[String, Set[ContainerId]]
+      allocatedHostToContainersMap: HashMap[String, Set[ContainerId]],
+      localityMatchedPendingAllocations: Seq[ContainerRequest]
     ): Array[ContainerLocalityPreferences] = {
     val updatedHostToContainerCount = expectedHostToContainerCount(
-      numLocalityAwareTasks, hostToLocalTaskCount, allocatedHostToContainersMap)
+      numLocalityAwareTasks, hostToLocalTaskCount, allocatedHostToContainersMap,
+        localityMatchedPendingAllocations)
     val updatedLocalityAwareContainerNum = updatedHostToContainerCount.values.sum
 
     // The number of containers to allocate, divided into two groups, one with preferred locality,
@@ -158,20 +167,28 @@ private[yarn] class LocalityPreferredContainerPlacementStrategy(
    * @param localityAwareTasks number of locality aware tasks
    * @param hostToLocalTaskCount a map to store the preferred hostname and possible task
    *                             numbers running on it, used as hints for container allocation
+   * @param allocatedHostToContainersMap host to allocated containers map, used to calculate the
+   *                                     expected locality preference by considering the existing
+   *                                     containers
+   * @param localityMatchedPendingAllocations A sequence of pending container request which
+   *                                          matches the localities of current required tasks.
    * @return a map with hostname as key and required number of containers on this host as value
    */
   private def expectedHostToContainerCount(
       localityAwareTasks: Int,
       hostToLocalTaskCount: Map[String, Int],
-      allocatedHostToContainersMap: HashMap[String, Set[ContainerId]]
+      allocatedHostToContainersMap: HashMap[String, Set[ContainerId]],
+      localityMatchedPendingAllocations: Seq[ContainerRequest]
     ): Map[String, Int] = {
     val totalLocalTaskNum = hostToLocalTaskCount.values.sum
+    val pendingHostToContainersMap = pendingHostToContainerCount(localityMatchedPendingAllocations)
+
     hostToLocalTaskCount.map { case (host, count) =>
       val expectedCount =
         count.toDouble * numExecutorsPending(localityAwareTasks) / totalLocalTaskNum
-      val existedCount = allocatedHostToContainersMap.get(host)
-        .map(_.size)
-        .getOrElse(0)
+      // Take the locality of pending containers into consideration
+      val existedCount = allocatedHostToContainersMap.get(host).map(_.size).getOrElse(0) +
+        pendingHostToContainersMap.getOrElse(host, 0.0)
 
       // If existing container can not fully satisfy the expected number of container,
       // the required container number is expected count minus existed count. Otherwise the
@@ -179,4 +196,31 @@ private[yarn] class LocalityPreferredContainerPlacementStrategy(
       (host, math.max(0, (expectedCount - existedCount).ceil.toInt))
     }
   }
+
+  /**
+   * According to the locality ratio and number of container requests, calculate the host to
+   * possible number of containers for pending allocated containers.
+   *
+   * If current locality ratio of hosts is: Host1 : Host2 : Host3 = 20 : 20 : 10,
+   * and pending container requests is 3, so the possible number of containers on
+   * Host1 : Host2 : Host3 will be 1.2 : 1.2 : 0.6.
+   * @param localityMatchedPendingAllocations A sequence of pending container request which
+   *                                          matches the localities of current required tasks.
+   * @return a Map with hostname as key and possible number of containers on this host as value
+   */
+  private def pendingHostToContainerCount(
+      localityMatchedPendingAllocations: Seq[ContainerRequest]): Map[String, Double] = {
+    val pendingHostToContainerCount = new HashMap[String, Int]()
+    localityMatchedPendingAllocations.foreach { cr =>
+      cr.getNodes.asScala.foreach { n =>
+        val count = pendingHostToContainerCount.getOrElse(n, 0) + 1
+        pendingHostToContainerCount(n) = count
+      }
+    }
+
+    val possibleTotalContainerNum = pendingHostToContainerCount.values.sum
+    val localityMatchedPendingNum = localityMatchedPendingAllocations.size.toDouble
+    pendingHostToContainerCount.mapValues(_ * localityMatchedPendingNum / possibleTotalContainerNum)
+      .toMap
+  }
 }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index 875bbd4e4e3d..a0cf1b4aa469 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -157,15 +157,19 @@ private[yarn] class YarnAllocator(
   def getNumExecutorsFailed: Int = numExecutorsFailed
 
   /**
-   * Number of container requests that have not yet been fulfilled.
+   * A sequence of pending container requests that have not yet been fulfilled.
    */
-  def getNumPendingAllocate: Int = getNumPendingAtLocation(ANY_HOST)
+  def getPendingAllocate: Seq[ContainerRequest] = getPendingAtLocation(ANY_HOST)
 
   /**
-   * Number of container requests at the given location that have not yet been fulfilled.
+   * A sequence of pending container requests at the given location that have not yet been
+   * fulfilled.
    */
-  private def getNumPendingAtLocation(location: String): Int =
-    amClient.getMatchingRequests(RM_REQUEST_PRIORITY, location, resource).asScala.map(_.size).sum
+  private def getPendingAtLocation(location: String): Seq[ContainerRequest] = {
+    amClient.getMatchingRequests(RM_REQUEST_PRIORITY, location, resource).asScala
+      .flatMap(_.asScala)
+      .toSeq
+  }
 
   /**
    * Request as many executors from the ResourceManager as needed to reach the desired total. If
@@ -251,20 +255,31 @@ private[yarn] class YarnAllocator(
    * Visible for testing.
    */
   def updateResourceRequests(): Unit = {
-    val numPendingAllocate = getNumPendingAllocate
+    val pendingAllocate = getPendingAllocate
+    val numPendingAllocate = pendingAllocate.size
     val missing = targetNumExecutors - numPendingAllocate - numExecutorsRunning
 
-    // TODO. Consider locality preferences of pending container requests.
-    // Since the last time we made container requests, stages have completed and been submitted,
-    // and that the localities at which we requested our pending executors
-    // no longer apply to our current needs. We should consider to remove all outstanding
-    // container requests and add requests anew each time to avoid this.
     if (missing > 0) {
       logInfo(s"Will request $missing executor containers, each with ${resource.getVirtualCores} " +
         s"cores and ${resource.getMemory} MB memory including $memoryOverhead MB overhead")
 
+      // Split the pending container request into three groups: locality matched list, locality
+      // unmatched list and non-locality list. Take the locality matched container request into
+      // consideration of container placement, treat as allocated containers.
+      // For locality unmatched and locality free container requests, cancel these container
+      // requests, since required locality preference has been changed, recalculating using
+      // container placement strategy.
+      val (localityMatched, localityUnMatched, localityFree) = splitPendingAllocationsByLocality(
+        hostToLocalTaskCounts, pendingAllocate)
+
+      // Remove the outdated container request and recalculate the requested container number
+      localityUnMatched.foreach(amClient.removeContainerRequest)
+      localityFree.foreach(amClient.removeContainerRequest)
+      val updatedNumContainer = missing + localityUnMatched.size + localityFree.size
+
       val containerLocalityPreferences = containerPlacementStrategy.localityOfRequestedContainers(
-        missing, numLocalityAwareTasks, hostToLocalTaskCounts, allocatedHostToContainersMap)
+        updatedNumContainer, numLocalityAwareTasks, hostToLocalTaskCounts,
+          allocatedHostToContainersMap, localityMatched)
 
       for (locality <- containerLocalityPreferences) {
         val request = createContainerRequest(resource, locality.nodes, locality.racks)
@@ -291,7 +306,7 @@ private[yarn] class YarnAllocator(
    * Creates a container request, handling the reflection required to use YARN features that were
    * added in recent versions.
    */
-  protected def createContainerRequest(
+  private def createContainerRequest(
       resource: Resource,
       nodes: Array[String],
       racks: Array[String]): ContainerRequest = {
@@ -535,6 +550,38 @@ private[yarn] class YarnAllocator(
 
   private[yarn] def getNumUnexpectedContainerRelease = numUnexpectedContainerRelease
 
+  /**
+   * Split the pending container requests into 3 groups based on current localities of pending
+   * tasks.
+   * @param hostToLocalTaskCount a map of preferred hostname to possible task counts to be used as
+   *                             container placement hint.
+   * @param pendingAllocations A sequence of pending allocation container request.
+   * @return A tuple of 3 sequences, first is a sequence of locality matched container
+   *         requests, second is a sequence of locality unmatched container requests, and third is a
+   *         sequence of locality free container requests.
+   */
+  private def splitPendingAllocationsByLocality(
+      hostToLocalTaskCount: Map[String, Int],
+      pendingAllocations: Seq[ContainerRequest]
+    ): (Seq[ContainerRequest], Seq[ContainerRequest], Seq[ContainerRequest]) = {
+    val localityMatched = ArrayBuffer[ContainerRequest]()
+    val localityUnMatched = ArrayBuffer[ContainerRequest]()
+    val localityFree = ArrayBuffer[ContainerRequest]()
+
+    val preferredHosts = hostToLocalTaskCount.keySet
+    pendingAllocations.foreach { cr =>
+      val nodes = cr.getNodes
+      if (nodes == null) {
+        localityFree += cr
+      } else if (nodes.asScala.toSet.intersect(preferredHosts).nonEmpty) {
+        localityMatched += cr
+      } else {
+        localityUnMatched += cr
+      }
+    }
+
+    (localityMatched.toSeq, localityUnMatched.toSeq, localityFree.toSeq)
+  }
 }
 
 private object YarnAllocator {
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/ContainerPlacementStrategySuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/ContainerPlacementStrategySuite.scala
index b7fe4ccc67a3..afb4b691b52d 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/ContainerPlacementStrategySuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/ContainerPlacementStrategySuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.deploy.yarn
 
+import org.apache.hadoop.yarn.client.api.AMRMClient.ContainerRequest
 import org.scalatest.{BeforeAndAfterEach, Matchers}
 
 import org.apache.spark.SparkFunSuite
@@ -26,6 +27,9 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
   private val yarnAllocatorSuite = new YarnAllocatorSuite
   import yarnAllocatorSuite._
 
+  def createContainerRequest(nodes: Array[String]): ContainerRequest =
+    new ContainerRequest(containerResource, nodes, null, YarnSparkHadoopUtil.RM_REQUEST_PRIORITY)
+
   override def beforeEach() {
     yarnAllocatorSuite.beforeEach()
   }
@@ -44,7 +48,8 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
     handler.handleAllocatedContainers(Array(createContainer("host1"), createContainer("host2")))
 
     val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
-      3, 15, Map("host3" -> 15, "host4" -> 15, "host5" -> 10), handler.allocatedHostToContainersMap)
+      3, 15, Map("host3" -> 15, "host4" -> 15, "host5" -> 10),
+        handler.allocatedHostToContainersMap, Seq.empty)
 
     assert(localities.map(_.nodes) === Array(
       Array("host3", "host4", "host5"),
@@ -66,7 +71,8 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
     ))
 
     val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
-      3, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10), handler.allocatedHostToContainersMap)
+      3, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10),
+        handler.allocatedHostToContainersMap, Seq.empty)
 
     assert(localities.map(_.nodes) ===
       Array(null, Array("host2", "host3"), Array("host2", "host3")))
@@ -86,7 +92,8 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
     ))
 
     val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
-      1, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10), handler.allocatedHostToContainersMap)
+      1, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10),
+        handler.allocatedHostToContainersMap, Seq.empty)
 
     assert(localities.map(_.nodes) === Array(Array("host2", "host3")))
   }
@@ -105,7 +112,8 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
     ))
 
     val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
-      3, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10), handler.allocatedHostToContainersMap)
+      3, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10),
+        handler.allocatedHostToContainersMap, Seq.empty)
 
     assert(localities.map(_.nodes) === Array(null, null, null))
   }
@@ -118,8 +126,28 @@ class ContainerPlacementStrategySuite extends SparkFunSuite with Matchers with B
     handler.handleAllocatedContainers(Array(createContainer("host1"), createContainer("host2")))
 
     val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
-      1, 0, Map.empty, handler.allocatedHostToContainersMap)
+      1, 0, Map.empty, handler.allocatedHostToContainersMap, Seq.empty)
 
     assert(localities.map(_.nodes) === Array(null))
   }
+
+  test("allocate locality preferred containers by considering the localities of pending requests") {
+    val handler = createAllocator(3)
+    handler.updateResourceRequests()
+    handler.handleAllocatedContainers(Array(
+      createContainer("host1"),
+      createContainer("host1"),
+      createContainer("host2")
+    ))
+
+    val pendingAllocationRequests = Seq(
+      createContainerRequest(Array("host2", "host3")),
+      createContainerRequest(Array("host1", "host4")))
+
+    val localities = handler.containerPlacementStrategy.localityOfRequestedContainers(
+      1, 15, Map("host1" -> 15, "host2" -> 15, "host3" -> 10),
+        handler.allocatedHostToContainersMap, pendingAllocationRequests)
+
+    assert(localities.map(_.nodes) === Array(Array("host3")))
+  }
 }
diff --git a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnAllocatorSuite.scala b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnAllocatorSuite.scala
index 5d05f514adde..bd80036c5cfa 100644
--- a/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnAllocatorSuite.scala
+++ b/yarn/src/test/scala/org/apache/spark/deploy/yarn/YarnAllocatorSuite.scala
@@ -116,7 +116,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     val handler = createAllocator(1)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (1)
+    handler.getPendingAllocate.size should be (1)
 
     val container = createContainer("host1")
     handler.handleAllocatedContainers(Array(container))
@@ -134,7 +134,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     val handler = createAllocator(4)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (4)
+    handler.getPendingAllocate.size should be (4)
 
     val container1 = createContainer("host1")
     val container2 = createContainer("host1")
@@ -154,7 +154,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     val handler = createAllocator(2)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (2)
+    handler.getPendingAllocate.size should be (2)
 
     val container1 = createContainer("host1")
     val container2 = createContainer("host2")
@@ -174,11 +174,11 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     val handler = createAllocator(4)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (4)
+    handler.getPendingAllocate.size should be (4)
 
     handler.requestTotalExecutorsWithPreferredLocalities(3, 0, Map.empty)
     handler.updateResourceRequests()
-    handler.getNumPendingAllocate should be (3)
+    handler.getPendingAllocate.size should be (3)
 
     val container = createContainer("host1")
     handler.handleAllocatedContainers(Array(container))
@@ -189,18 +189,18 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
 
     handler.requestTotalExecutorsWithPreferredLocalities(2, 0, Map.empty)
     handler.updateResourceRequests()
-    handler.getNumPendingAllocate should be (1)
+    handler.getPendingAllocate.size should be (1)
   }
 
   test("decrease total requested executors to less than currently running") {
     val handler = createAllocator(4)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (4)
+    handler.getPendingAllocate.size should be (4)
 
     handler.requestTotalExecutorsWithPreferredLocalities(3, 0, Map.empty)
     handler.updateResourceRequests()
-    handler.getNumPendingAllocate should be (3)
+    handler.getPendingAllocate.size should be (3)
 
     val container1 = createContainer("host1")
     val container2 = createContainer("host2")
@@ -210,7 +210,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
 
     handler.requestTotalExecutorsWithPreferredLocalities(1, 0, Map.empty)
     handler.updateResourceRequests()
-    handler.getNumPendingAllocate should be (0)
+    handler.getPendingAllocate.size should be (0)
     handler.getNumExecutorsRunning should be (2)
   }
 
@@ -218,7 +218,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     val handler = createAllocator(4)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (4)
+    handler.getPendingAllocate.size should be (4)
 
     val container1 = createContainer("host1")
     val container2 = createContainer("host2")
@@ -233,14 +233,14 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     handler.updateResourceRequests()
     handler.processCompletedContainers(statuses.toSeq)
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (1)
+    handler.getPendingAllocate.size should be (1)
   }
 
   test("lost executor removed from backend") {
     val handler = createAllocator(4)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (4)
+    handler.getPendingAllocate.size should be (4)
 
     val container1 = createContainer("host1")
     val container2 = createContainer("host2")
@@ -255,7 +255,7 @@ class YarnAllocatorSuite extends SparkFunSuite with Matchers with BeforeAndAfter
     handler.processCompletedContainers(statuses.toSeq)
     handler.updateResourceRequests()
     handler.getNumExecutorsRunning should be (0)
-    handler.getNumPendingAllocate should be (2)
+    handler.getPendingAllocate.size should be (2)
     handler.getNumExecutorsFailed should be (2)
     handler.getNumUnexpectedContainerRelease should be (2)
   }

From 71d1c907dec446db566b19f912159fd8f46deb7d Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 2 Nov 2015 10:26:36 -0800
Subject: [PATCH 443/896] [SPARK-10997][CORE] Add "client mode" to netty rpc
 env.

"Client mode" means the RPC env will not listen for incoming connections.
This allows certain processes in the Spark stack (such as Executors or
tha YARN client-mode AM) to act as pure clients when using the netty-based
RPC backend, reducing the number of sockets needed by the app and also the
number of open ports.

Client connections are also preferred when endpoints that actually have
a listening socket are involved; so, for example, if a Worker connects
to a Master and the Master needs to send a message to a Worker endpoint,
that client connection will be used, even though the Worker is also
listening for incoming connections.

With this change, the workaround for SPARK-10987 isn't necessary anymore, and
is removed. The AM connects to the driver in "client mode", and that connection
is used for all driver <-> AM communication, and so the AM is properly notified
when the connection goes down.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9210 from vanzin/SPARK-10997.
---
 .../scala/org/apache/spark/SparkEnv.scala     |   7 +-
 .../CoarseGrainedExecutorBackend.scala        |  20 +-
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |   8 +-
 .../apache/spark/rpc/netty/Dispatcher.scala   |   2 +-
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 245 ++++++++++--------
 .../org/apache/spark/rpc/netty/Outbox.scala   |  24 +-
 .../spark/rpc/netty/RpcEndpointAddress.scala  |  24 +-
 .../cluster/CoarseGrainedClusterMessage.scala |  10 +-
 .../CoarseGrainedSchedulerBackend.scala       |  18 +-
 .../cluster/YarnSchedulerBackend.scala        |   2 -
 .../org/apache/spark/rpc/RpcEnvSuite.scala    |  50 ++--
 .../spark/rpc/akka/AkkaRpcEnvSuite.scala      |  11 +-
 .../rpc/netty/NettyRpcAddressSuite.scala      |   7 +-
 .../spark/rpc/netty/NettyRpcEnvSuite.scala    |   9 +-
 .../rpc/netty/NettyRpcHandlerSuite.scala      |   8 +-
 network/yarn/pom.xml                          |   5 +
 .../spark/deploy/yarn/ApplicationMaster.scala |   6 +-
 17 files changed, 266 insertions(+), 190 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 398e0936906a..23ae9360f6a2 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -252,7 +252,8 @@ object SparkEnv extends Logging {
 
     // Create the ActorSystem for Akka and get the port it binds to.
     val actorSystemName = if (isDriver) driverActorSystemName else executorActorSystemName
-    val rpcEnv = RpcEnv.create(actorSystemName, hostname, port, conf, securityManager)
+    val rpcEnv = RpcEnv.create(actorSystemName, hostname, port, conf, securityManager,
+      clientMode = !isDriver)
     val actorSystem: ActorSystem =
       if (rpcEnv.isInstanceOf[AkkaRpcEnv]) {
         rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
@@ -262,9 +263,11 @@ object SparkEnv extends Logging {
       }
 
     // Figure out which port Akka actually bound to in case the original port is 0 or occupied.
+    // In the non-driver case, the RPC env's address may be null since it may not be listening
+    // for incoming connections.
     if (isDriver) {
       conf.set("spark.driver.port", rpcEnv.address.port.toString)
-    } else {
+    } else if (rpcEnv.address != null) {
       conf.set("spark.executor.port", rpcEnv.address.port.toString)
     }
 
diff --git a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
index a9c6a05ecd43..c2ebf3059621 100644
--- a/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
+++ b/core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala
@@ -45,8 +45,6 @@ private[spark] class CoarseGrainedExecutorBackend(
     env: SparkEnv)
   extends ThreadSafeRpcEndpoint with ExecutorBackend with Logging {
 
-  Utils.checkHostPort(hostPort, "Expected hostport")
-
   var executor: Executor = null
   @volatile var driver: Option[RpcEndpointRef] = None
 
@@ -80,9 +78,8 @@ private[spark] class CoarseGrainedExecutorBackend(
   }
 
   override def receive: PartialFunction[Any, Unit] = {
-    case RegisteredExecutor =>
+    case RegisteredExecutor(hostname) =>
       logInfo("Successfully registered with driver")
-      val (hostname, _) = Utils.parseHostPort(hostPort)
       executor = new Executor(executorId, hostname, env, userClassPath, isLocal = false)
 
     case RegisterExecutorFailed(message) =>
@@ -163,7 +160,8 @@ private[spark] object CoarseGrainedExecutorBackend extends Logging {
         hostname,
         port,
         executorConf,
-        new SecurityManager(executorConf))
+        new SecurityManager(executorConf),
+        clientMode = true)
       val driver = fetcher.setupEndpointRefByURI(driverUrl)
       val props = driver.askWithRetry[Seq[(String, String)]](RetrieveSparkProps) ++
         Seq[(String, String)](("spark.app.id", appId))
@@ -188,12 +186,12 @@ private[spark] object CoarseGrainedExecutorBackend extends Logging {
       val env = SparkEnv.createExecutorEnv(
         driverConf, executorId, hostname, port, cores, isLocal = false)
 
-      // SparkEnv sets spark.driver.port so it shouldn't be 0 anymore.
-      val boundPort = env.conf.getInt("spark.executor.port", 0)
-      assert(boundPort != 0)
-
-      // Start the CoarseGrainedExecutorBackend endpoint.
-      val sparkHostPort = hostname + ":" + boundPort
+      // SparkEnv will set spark.executor.port if the rpc env is listening for incoming
+      // connections (e.g., if it's using akka). Otherwise, the executor is running in
+      // client mode only, and does not accept incoming connections.
+      val sparkHostPort = env.conf.getOption("spark.executor.port").map { port =>
+          hostname + ":" + port
+        }.orNull
       env.rpcEnv.setupEndpoint("Executor", new CoarseGrainedExecutorBackend(
         env.rpcEnv, driverUrl, executorId, sparkHostPort, cores, userClassPath, env))
       workerUrl.foreach { url =>
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index 2c4a8b9a0a87..a560fd10cdf7 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -43,9 +43,10 @@ private[spark] object RpcEnv {
       host: String,
       port: Int,
       conf: SparkConf,
-      securityManager: SecurityManager): RpcEnv = {
+      securityManager: SecurityManager,
+      clientMode: Boolean = false): RpcEnv = {
     // Using Reflection to create the RpcEnv to avoid to depend on Akka directly
-    val config = RpcEnvConfig(conf, name, host, port, securityManager)
+    val config = RpcEnvConfig(conf, name, host, port, securityManager, clientMode)
     getRpcEnvFactory(conf).create(config)
   }
 }
@@ -139,4 +140,5 @@ private[spark] case class RpcEnvConfig(
     name: String,
     host: String,
     port: Int,
-    securityManager: SecurityManager)
+    securityManager: SecurityManager,
+    clientMode: Boolean)
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
index 7bf44a6565b6..eb25d6c7b721 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Dispatcher.scala
@@ -55,7 +55,7 @@ private[netty] class Dispatcher(nettyEnv: NettyRpcEnv) extends Logging {
   private var stopped = false
 
   def registerRpcEndpoint(name: String, endpoint: RpcEndpoint): NettyRpcEndpointRef = {
-    val addr = new RpcEndpointAddress(nettyEnv.address.host, nettyEnv.address.port, name)
+    val addr = RpcEndpointAddress(nettyEnv.address, name)
     val endpointRef = new NettyRpcEndpointRef(nettyEnv.conf, addr, nettyEnv)
     synchronized {
       if (stopped) {
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 284284eb805b..09093819bb22 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -17,10 +17,12 @@
 package org.apache.spark.rpc.netty
 
 import java.io._
+import java.lang.{Boolean => JBoolean}
 import java.net.{InetSocketAddress, URI}
 import java.nio.ByteBuffer
 import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicBoolean
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.mutable
@@ -29,6 +31,7 @@ import scala.reflect.ClassTag
 import scala.util.{DynamicVariable, Failure, Success}
 import scala.util.control.NonFatal
 
+import com.google.common.base.Preconditions
 import org.apache.spark.{Logging, SecurityManager, SparkConf}
 import org.apache.spark.network.TransportContext
 import org.apache.spark.network.client._
@@ -45,15 +48,14 @@ private[netty] class NettyRpcEnv(
     host: String,
     securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
 
-  // Override numConnectionsPerPeer to 1 for RPC.
   private val transportConf = SparkTransportConf.fromSparkConf(
     conf.clone.set("spark.shuffle.io.numConnectionsPerPeer", "1"),
     conf.getInt("spark.rpc.io.threads", 0))
 
   private val dispatcher: Dispatcher = new Dispatcher(this)
 
-  private val transportContext =
-    new TransportContext(transportConf, new NettyRpcHandler(dispatcher, this))
+  private val transportContext = new TransportContext(transportConf,
+    new NettyRpcHandler(dispatcher, this))
 
   private val clientFactory = {
     val bootstraps: java.util.List[TransportClientBootstrap] =
@@ -95,7 +97,7 @@ private[netty] class NettyRpcEnv(
     }
   }
 
-  def start(port: Int): Unit = {
+  def startServer(port: Int): Unit = {
     val bootstraps: java.util.List[TransportServerBootstrap] =
       if (securityManager.isAuthenticationEnabled()) {
         java.util.Arrays.asList(new SaslServerBootstrap(transportConf, securityManager))
@@ -107,9 +109,9 @@ private[netty] class NettyRpcEnv(
       RpcEndpointVerifier.NAME, new RpcEndpointVerifier(this, dispatcher))
   }
 
+  @Nullable
   override lazy val address: RpcAddress = {
-    require(server != null, "NettyRpcEnv has not yet started")
-    RpcAddress(host, server.getPort)
+    if (server != null) RpcAddress(host, server.getPort()) else null
   }
 
   override def setupEndpoint(name: String, endpoint: RpcEndpoint): RpcEndpointRef = {
@@ -120,7 +122,7 @@ private[netty] class NettyRpcEnv(
     val addr = RpcEndpointAddress(uri)
     val endpointRef = new NettyRpcEndpointRef(conf, addr, this)
     val verifier = new NettyRpcEndpointRef(
-      conf, RpcEndpointAddress(addr.host, addr.port, RpcEndpointVerifier.NAME), this)
+      conf, RpcEndpointAddress(addr.rpcAddress, RpcEndpointVerifier.NAME), this)
     verifier.ask[Boolean](RpcEndpointVerifier.CheckExistence(endpointRef.name)).flatMap { find =>
       if (find) {
         Future.successful(endpointRef)
@@ -135,28 +137,34 @@ private[netty] class NettyRpcEnv(
     dispatcher.stop(endpointRef)
   }
 
-  private def postToOutbox(address: RpcAddress, message: OutboxMessage): Unit = {
-    val targetOutbox = {
-      val outbox = outboxes.get(address)
-      if (outbox == null) {
-        val newOutbox = new Outbox(this, address)
-        val oldOutbox = outboxes.putIfAbsent(address, newOutbox)
-        if (oldOutbox == null) {
-          newOutbox
+  private def postToOutbox(receiver: NettyRpcEndpointRef, message: OutboxMessage): Unit = {
+    if (receiver.client != null) {
+      receiver.client.sendRpc(message.content, message.createCallback(receiver.client));
+    } else {
+      require(receiver.address != null,
+        "Cannot send message to client endpoint with no listen address.")
+      val targetOutbox = {
+        val outbox = outboxes.get(receiver.address)
+        if (outbox == null) {
+          val newOutbox = new Outbox(this, receiver.address)
+          val oldOutbox = outboxes.putIfAbsent(receiver.address, newOutbox)
+          if (oldOutbox == null) {
+            newOutbox
+          } else {
+            oldOutbox
+          }
         } else {
-          oldOutbox
+          outbox
         }
+      }
+      if (stopped.get) {
+        // It's possible that we put `targetOutbox` after stopping. So we need to clean it.
+        outboxes.remove(receiver.address)
+        targetOutbox.stop()
       } else {
-        outbox
+        targetOutbox.send(message)
       }
     }
-    if (stopped.get) {
-      // It's possible that we put `targetOutbox` after stopping. So we need to clean it.
-      outboxes.remove(address)
-      targetOutbox.stop()
-    } else {
-      targetOutbox.send(message)
-    }
   }
 
   private[netty] def send(message: RequestMessage): Unit = {
@@ -174,17 +182,14 @@ private[netty] class NettyRpcEnv(
       }(ThreadUtils.sameThread)
     } else {
       // Message to a remote RPC endpoint.
-      postToOutbox(remoteAddr, OutboxMessage(serialize(message), new RpcResponseCallback {
-
-        override def onFailure(e: Throwable): Unit = {
+      postToOutbox(message.receiver, OutboxMessage(serialize(message),
+        (e) => {
           logWarning(s"Exception when sending $message", e)
-        }
-
-        override def onSuccess(response: Array[Byte]): Unit = {
-          val ack = deserialize[Ack](response)
+        },
+        (client, response) => {
+          val ack = deserialize[Ack](client, response)
           logDebug(s"Receive ack from ${ack.sender}")
-        }
-      }))
+        }))
     }
   }
 
@@ -214,16 +219,14 @@ private[netty] class NettyRpcEnv(
           }
       }(ThreadUtils.sameThread)
     } else {
-      postToOutbox(remoteAddr, OutboxMessage(serialize(message), new RpcResponseCallback {
-
-        override def onFailure(e: Throwable): Unit = {
+      postToOutbox(message.receiver, OutboxMessage(serialize(message),
+        (e) => {
           if (!promise.tryFailure(e)) {
             logWarning("Ignore Exception", e)
           }
-        }
-
-        override def onSuccess(response: Array[Byte]): Unit = {
-          val reply = deserialize[AskResponse](response)
+        },
+        (client, response) => {
+          val reply = deserialize[AskResponse](client, response)
           if (reply.reply.isInstanceOf[RpcFailure]) {
             if (!promise.tryFailure(reply.reply.asInstanceOf[RpcFailure].e)) {
               logWarning(s"Ignore failure: ${reply.reply}")
@@ -231,8 +234,7 @@ private[netty] class NettyRpcEnv(
           } else if (!promise.trySuccess(reply.reply)) {
             logWarning(s"Ignore message: ${reply}")
           }
-        }
-      }))
+        }))
     }
     promise.future
   }
@@ -243,9 +245,11 @@ private[netty] class NettyRpcEnv(
       buffer.array(), buffer.arrayOffset + buffer.position, buffer.arrayOffset + buffer.limit)
   }
 
-  private[netty] def deserialize[T: ClassTag](bytes: Array[Byte]): T = {
-    deserialize { () =>
-      javaSerializerInstance.deserialize[T](ByteBuffer.wrap(bytes))
+  private[netty] def deserialize[T: ClassTag](client: TransportClient, bytes: Array[Byte]): T = {
+    NettyRpcEnv.currentClient.withValue(client) {
+      deserialize { () =>
+        javaSerializerInstance.deserialize[T](ByteBuffer.wrap(bytes))
+      }
     }
   }
 
@@ -254,7 +258,7 @@ private[netty] class NettyRpcEnv(
   }
 
   override def uriOf(systemName: String, address: RpcAddress, endpointName: String): String =
-    new RpcEndpointAddress(address.host, address.port, endpointName).toString
+    new RpcEndpointAddress(address, endpointName).toString
 
   override def shutdown(): Unit = {
     cleanup()
@@ -297,6 +301,7 @@ private[netty] class NettyRpcEnv(
       deserializationAction()
     }
   }
+
 }
 
 private[netty] object NettyRpcEnv extends Logging {
@@ -312,6 +317,13 @@ private[netty] object NettyRpcEnv extends Logging {
    * }}}
    */
   private[netty] val currentEnv = new DynamicVariable[NettyRpcEnv](null)
+
+  /**
+   * Similar to `currentEnv`, this variable references the client instance associated with an
+   * RPC, in case it's needed to find out the remote address during deserialization.
+   */
+  private[netty] val currentClient = new DynamicVariable[TransportClient](null)
+
 }
 
 private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
@@ -324,47 +336,68 @@ private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
       new JavaSerializer(sparkConf).newInstance().asInstanceOf[JavaSerializerInstance]
     val nettyEnv =
       new NettyRpcEnv(sparkConf, javaSerializerInstance, config.host, config.securityManager)
-    val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
-      nettyEnv.start(actualPort)
-      (nettyEnv, actualPort)
-    }
-    try {
-      Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
-    } catch {
-      case NonFatal(e) =>
-        nettyEnv.shutdown()
-        throw e
+    if (!config.clientMode) {
+      val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
+        nettyEnv.startServer(actualPort)
+        (nettyEnv, actualPort)
+      }
+      try {
+        Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
+      } catch {
+        case NonFatal(e) =>
+          nettyEnv.shutdown()
+          throw e
+      }
     }
+    nettyEnv
   }
 }
 
-private[netty] class NettyRpcEndpointRef(@transient private val conf: SparkConf)
+/**
+ * The NettyRpcEnv version of RpcEndpointRef.
+ *
+ * This class behaves differently depending on where it's created. On the node that "owns" the
+ * RpcEndpoint, it's a simple wrapper around the RpcEndpointAddress instance.
+ *
+ * On other machines that receive a serialized version of the reference, the behavior changes. The
+ * instance will keep track of the TransportClient that sent the reference, so that messages
+ * to the endpoint are sent over the client connection, instead of needing a new connection to
+ * be opened.
+ *
+ * The RpcAddress of this ref can be null; what that means is that the ref can only be used through
+ * a client connection, since the process hosting the endpoint is not listening for incoming
+ * connections. These refs should not be shared with 3rd parties, since they will not be able to
+ * send messages to the endpoint.
+ *
+ * @param conf Spark configuration.
+ * @param endpointAddress The address where the endpoint is listening.
+ * @param nettyEnv The RpcEnv associated with this ref.
+ * @param local Whether the referenced endpoint lives in the same process.
+ */
+private[netty] class NettyRpcEndpointRef(
+    @transient private val conf: SparkConf,
+    endpointAddress: RpcEndpointAddress,
+    @transient @volatile private var nettyEnv: NettyRpcEnv)
   extends RpcEndpointRef(conf) with Serializable with Logging {
 
-  @transient @volatile private var nettyEnv: NettyRpcEnv = _
+  @transient @volatile var client: TransportClient = _
 
-  @transient @volatile private var _address: RpcEndpointAddress = _
+  private val _address = if (endpointAddress.rpcAddress != null) endpointAddress else null
+  private val _name = endpointAddress.name
 
-  def this(conf: SparkConf, _address: RpcEndpointAddress, nettyEnv: NettyRpcEnv) {
-    this(conf)
-    this._address = _address
-    this.nettyEnv = nettyEnv
-  }
-
-  override def address: RpcAddress = _address.toRpcAddress
+  override def address: RpcAddress = if (_address != null) _address.rpcAddress else null
 
   private def readObject(in: ObjectInputStream): Unit = {
     in.defaultReadObject()
-    _address = in.readObject().asInstanceOf[RpcEndpointAddress]
     nettyEnv = NettyRpcEnv.currentEnv.value
+    client = NettyRpcEnv.currentClient.value
   }
 
   private def writeObject(out: ObjectOutputStream): Unit = {
     out.defaultWriteObject()
-    out.writeObject(_address)
   }
 
-  override def name: String = _address.name
+  override def name: String = _name
 
   override def ask[T: ClassTag](message: Any, timeout: RpcTimeout): Future[T] = {
     val promise = Promise[Any]()
@@ -429,41 +462,43 @@ private[netty] case class Ack(sender: NettyRpcEndpointRef) extends ResponseMessa
 private[netty] case class RpcFailure(e: Throwable)
 
 /**
- * Maintain the mapping relations between client addresses and [[RpcEnv]] addresses, broadcast
- * network events and forward messages to [[Dispatcher]].
+ * Dispatches incoming RPCs to registered endpoints.
+ *
+ * The handler keeps track of all client instances that communicate with it, so that the RpcEnv
+ * knows which `TransportClient` instance to use when sending RPCs to a client endpoint (i.e.,
+ * one that is not listening for incoming connections, but rather needs to be contacted via the
+ * client socket).
+ *
+ * Events are sent on a per-connection basis, so if a client opens multiple connections to the
+ * RpcEnv, multiple connection / disconnection events will be created for that client (albeit
+ * with different `RpcAddress` information).
  */
 private[netty] class NettyRpcHandler(
     dispatcher: Dispatcher, nettyEnv: NettyRpcEnv) extends RpcHandler with Logging {
 
-  private type ClientAddress = RpcAddress
-  private type RemoteEnvAddress = RpcAddress
-
-  // Store all client addresses and their NettyRpcEnv addresses.
-  // TODO: Is this even necessary?
-  @GuardedBy("this")
-  private val remoteAddresses = new mutable.HashMap[ClientAddress, RemoteEnvAddress]()
+  // TODO: Can we add connection callback (channel registered) to the underlying framework?
+  // A variable to track whether we should dispatch the RemoteProcessConnected message.
+  private val clients = new ConcurrentHashMap[TransportClient, JBoolean]()
 
   override def receive(
-      client: TransportClient, message: Array[Byte], callback: RpcResponseCallback): Unit = {
-    val requestMessage = nettyEnv.deserialize[RequestMessage](message)
-    val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
+      client: TransportClient,
+      message: Array[Byte],
+      callback: RpcResponseCallback): Unit = {
+    val addr = client.getChannel().remoteAddress().asInstanceOf[InetSocketAddress]
     assert(addr != null)
-    val remoteEnvAddress = requestMessage.senderAddress
     val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-
-    // TODO: Can we add connection callback (channel registered) to the underlying framework?
-    // A variable to track whether we should dispatch the RemoteProcessConnected message.
-    var dispatchRemoteProcessConnected = false
-    synchronized {
-      if (remoteAddresses.put(clientAddr, remoteEnvAddress).isEmpty) {
-        // clientAddr connects at the first time, fire "RemoteProcessConnected"
-        dispatchRemoteProcessConnected = true
-      }
+    if (clients.putIfAbsent(client, JBoolean.TRUE) == null) {
+      dispatcher.postToAll(RemoteProcessConnected(clientAddr))
     }
-    if (dispatchRemoteProcessConnected) {
-      dispatcher.postToAll(RemoteProcessConnected(remoteEnvAddress))
-    }
-    dispatcher.postRemoteMessage(requestMessage, callback)
+    val requestMessage = nettyEnv.deserialize[RequestMessage](client, message)
+    val messageToDispatch = if (requestMessage.senderAddress == null) {
+        // Create a new message with the socket address of the client as the sender.
+        RequestMessage(clientAddr, requestMessage.receiver, requestMessage.content,
+          requestMessage.needReply)
+      } else {
+        requestMessage
+      }
+    dispatcher.postRemoteMessage(messageToDispatch, callback)
   }
 
   override def getStreamManager: StreamManager = new OneForOneStreamManager
@@ -472,15 +507,7 @@ private[netty] class NettyRpcHandler(
     val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
-      val broadcastMessage =
-        synchronized {
-          remoteAddresses.get(clientAddr).map(RemoteProcessConnectionError(cause, _))
-        }
-      if (broadcastMessage.isEmpty) {
-        logError(cause.getMessage, cause)
-      } else {
-        dispatcher.postToAll(broadcastMessage.get)
-      }
+      dispatcher.postToAll(RemoteProcessConnectionError(cause, clientAddr))
     } else {
       // If the channel is closed before connecting, its remoteAddress will be null.
       // See java.net.Socket.getRemoteSocketAddress
@@ -493,15 +520,9 @@ private[netty] class NettyRpcHandler(
     val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
       val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
+      clients.remove(client)
       nettyEnv.removeOutbox(clientAddr)
-      val messageOpt: Option[RemoteProcessDisconnected] =
-      synchronized {
-        remoteAddresses.get(clientAddr).flatMap { remoteEnvAddress =>
-          remoteAddresses -= clientAddr
-          Some(RemoteProcessDisconnected(remoteEnvAddress))
-        }
-      }
-      messageOpt.foreach(dispatcher.postToAll)
+      dispatcher.postToAll(RemoteProcessDisconnected(clientAddr))
     } else {
       // If the channel is closed before connecting, its remoteAddress will be null. In this case,
       // we can ignore it since we don't fire "Associated".
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala
index 7d9d593b3624..2f6817f2eb93 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Outbox.scala
@@ -26,7 +26,21 @@ import org.apache.spark.SparkException
 import org.apache.spark.network.client.{RpcResponseCallback, TransportClient}
 import org.apache.spark.rpc.RpcAddress
 
-private[netty] case class OutboxMessage(content: Array[Byte], callback: RpcResponseCallback)
+private[netty] case class OutboxMessage(content: Array[Byte],
+  _onFailure: (Throwable) => Unit,
+  _onSuccess: (TransportClient, Array[Byte]) => Unit) {
+
+  def createCallback(client: TransportClient): RpcResponseCallback = new RpcResponseCallback() {
+    override def onFailure(e: Throwable): Unit = {
+      _onFailure(e)
+    }
+
+    override def onSuccess(response: Array[Byte]): Unit = {
+      _onSuccess(client, response)
+    }
+  }
+
+}
 
 private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
 
@@ -68,7 +82,7 @@ private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
       }
     }
     if (dropped) {
-      message.callback.onFailure(new SparkException("Message is dropped because Outbox is stopped"))
+      message._onFailure(new SparkException("Message is dropped because Outbox is stopped"))
     } else {
       drainOutbox()
     }
@@ -108,7 +122,7 @@ private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
       try {
         val _client = synchronized { client }
         if (_client != null) {
-          _client.sendRpc(message.content, message.callback)
+          _client.sendRpc(message.content, message.createCallback(_client))
         } else {
           assert(stopped == true)
         }
@@ -181,7 +195,7 @@ private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
     // update messages and it's safe to just drain the queue.
     var message = messages.poll()
     while (message != null) {
-      message.callback.onFailure(e)
+      message._onFailure(e)
       message = messages.poll()
     }
     assert(messages.isEmpty)
@@ -215,7 +229,7 @@ private[netty] class Outbox(nettyEnv: NettyRpcEnv, val address: RpcAddress) {
     // update messages and it's safe to just drain the queue.
     var message = messages.poll()
     while (message != null) {
-      message.callback.onFailure(new SparkException("Message is dropped because Outbox is stopped"))
+      message._onFailure(new SparkException("Message is dropped because Outbox is stopped"))
       message = messages.poll()
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
index 87b623693681..d2e94f943aba 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/RpcEndpointAddress.scala
@@ -23,15 +23,25 @@ import org.apache.spark.rpc.RpcAddress
 /**
  * An address identifier for an RPC endpoint.
  *
- * @param host host name of the remote process.
- * @param port the port the remote RPC environment binds to.
- * @param name name of the remote endpoint.
+ * The `rpcAddress` may be null, in which case the endpoint is registered via a client-only
+ * connection and can only be reached via the client that sent the endpoint reference.
+ *
+ * @param rpcAddress The socket address of the endpint.
+ * @param name Name of the endpoint.
  */
-private[netty] case class RpcEndpointAddress(host: String, port: Int, name: String) {
+private[netty] case class RpcEndpointAddress(val rpcAddress: RpcAddress, val name: String) {
+
+  require(name != null, "RpcEndpoint name must be provided.")
 
-  def toRpcAddress: RpcAddress = RpcAddress(host, port)
+  def this(host: String, port: Int, name: String) = {
+    this(RpcAddress(host, port), name)
+  }
 
-  override val toString = s"spark://$name@$host:$port"
+  override val toString = if (rpcAddress != null) {
+      s"spark://$name@${rpcAddress.host}:${rpcAddress.port}"
+    } else {
+      s"spark-client://$name"
+    }
 }
 
 private[netty] object RpcEndpointAddress {
@@ -51,7 +61,7 @@ private[netty] object RpcEndpointAddress {
           uri.getQuery != null) {
         throw new SparkException("Invalid Spark URL: " + sparkUrl)
       }
-      RpcEndpointAddress(host, port, name)
+      new RpcEndpointAddress(host, port, name)
     } catch {
       case e: java.net.URISyntaxException =>
         throw new SparkException("Invalid Spark URL: " + sparkUrl, e)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
index 8103efa7302e..f3d0d8547677 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedClusterMessage.scala
@@ -38,7 +38,7 @@ private[spark] object CoarseGrainedClusterMessages {
 
   sealed trait RegisterExecutorResponse
 
-  case object RegisteredExecutor extends CoarseGrainedClusterMessage
+  case class RegisteredExecutor(hostname: String) extends CoarseGrainedClusterMessage
     with RegisterExecutorResponse
 
   case class RegisterExecutorFailed(message: String) extends CoarseGrainedClusterMessage
@@ -51,9 +51,7 @@ private[spark] object CoarseGrainedClusterMessages {
       hostPort: String,
       cores: Int,
       logUrls: Map[String, String])
-    extends CoarseGrainedClusterMessage {
-    Utils.checkHostPort(hostPort, "Expected host port")
-  }
+    extends CoarseGrainedClusterMessage
 
   case class StatusUpdate(executorId: String, taskId: Long, state: TaskState,
     data: SerializableBuffer) extends CoarseGrainedClusterMessage
@@ -107,8 +105,4 @@ private[spark] object CoarseGrainedClusterMessages {
   // Used internally by executors to shut themselves down.
   case object Shutdown extends CoarseGrainedClusterMessage
 
-  // SPARK-10987: workaround for netty RPC issue; forces a connection from the driver back
-  // to the AM.
-  case object DriverHello extends CoarseGrainedClusterMessage
-
 }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index 55a564b5c8ea..439a11927026 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -131,16 +131,22 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
 
       case RegisterExecutor(executorId, executorRef, hostPort, cores, logUrls) =>
-        Utils.checkHostPort(hostPort, "Host port expected " + hostPort)
         if (executorDataMap.contains(executorId)) {
           context.reply(RegisterExecutorFailed("Duplicate executor ID: " + executorId))
         } else {
-          logInfo("Registered executor: " + executorRef + " with ID " + executorId)
-          addressToExecutorId(executorRef.address) = executorId
+          // If the executor's rpc env is not listening for incoming connections, `hostPort`
+          // will be null, and the client connection should be used to contact the executor.
+          val executorAddress = if (executorRef.address != null) {
+              executorRef.address
+            } else {
+              context.senderAddress
+            }
+          logInfo(s"Registered executor $executorRef ($executorAddress) with ID $executorId")
+          addressToExecutorId(executorAddress) = executorId
           totalCoreCount.addAndGet(cores)
           totalRegisteredExecutors.addAndGet(1)
-          val (host, _) = Utils.parseHostPort(hostPort)
-          val data = new ExecutorData(executorRef, executorRef.address, host, cores, cores, logUrls)
+          val data = new ExecutorData(executorRef, executorRef.address, executorAddress.host,
+            cores, cores, logUrls)
           // This must be synchronized because variables mutated
           // in this block are read when requesting executors
           CoarseGrainedSchedulerBackend.this.synchronized {
@@ -151,7 +157,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
             }
           }
           // Note: some tests expect the reply to come after we put the executor in the map
-          context.reply(RegisteredExecutor)
+          context.reply(RegisteredExecutor(executorAddress.host))
           listenerBus.post(
             SparkListenerExecutorAdded(System.currentTimeMillis(), executorId, data))
           makeOffers()
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index e483688edef5..cb24072d7d94 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -170,8 +170,6 @@ private[spark] abstract class YarnSchedulerBackend(
       case RegisterClusterManager(am) =>
         logInfo(s"ApplicationMaster registered as $am")
         amEndpoint = Option(am)
-        // See SPARK-10987.
-        am.send(DriverHello)
 
       case AddWebUIFilter(filterName, filterParams, proxyBase) =>
         addWebUIFilter(filterName, filterParams, proxyBase)
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 3bead6395d38..834e4743df86 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -48,7 +48,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     }
   }
 
-  def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv
+  def createRpcEnv(conf: SparkConf, name: String, port: Int, clientMode: Boolean = false): RpcEnv
 
   test("send a message locally") {
     @volatile var message: String = null
@@ -76,7 +76,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "send-remotely")
     try {
@@ -130,7 +130,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "ask-remotely")
     try {
@@ -158,7 +158,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     val shortProp = "spark.rpc.short.timeout"
     conf.set("spark.rpc.retry.wait", "0")
     conf.set("spark.rpc.numRetries", "1")
-    val anotherEnv = createRpcEnv(conf, "remote", 13345)
+    val anotherEnv = createRpcEnv(conf, "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "ask-timeout")
     try {
@@ -417,7 +417,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "sendWithReply-remotely")
     try {
@@ -457,7 +457,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "sendWithReply-remotely-error")
@@ -497,26 +497,40 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
 
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "network-events")
     val remoteAddress = anotherEnv.address
     rpcEndpointRef.send("hello")
     eventually(timeout(5 seconds), interval(5 millis)) {
-      assert(events === List(("onConnected", remoteAddress)))
+      // anotherEnv is connected in client mode, so the remote address may be unknown depending on
+      // the implementation. Account for that when doing checks.
+      if (remoteAddress != null) {
+        assert(events === List(("onConnected", remoteAddress)))
+      } else {
+        assert(events.size === 1)
+        assert(events(0)._1 === "onConnected")
+      }
     }
 
     anotherEnv.shutdown()
     anotherEnv.awaitTermination()
     eventually(timeout(5 seconds), interval(5 millis)) {
-      assert(events === List(
-        ("onConnected", remoteAddress),
-        ("onNetworkError", remoteAddress),
-        ("onDisconnected", remoteAddress)) ||
-        events === List(
-        ("onConnected", remoteAddress),
-        ("onDisconnected", remoteAddress)))
+      // Account for anotherEnv not having an address due to running in client mode.
+      if (remoteAddress != null) {
+        assert(events === List(
+          ("onConnected", remoteAddress),
+          ("onNetworkError", remoteAddress),
+          ("onDisconnected", remoteAddress)) ||
+          events === List(
+          ("onConnected", remoteAddress),
+          ("onDisconnected", remoteAddress)))
+      } else {
+        val eventNames = events.map(_._1)
+        assert(eventNames === List("onConnected", "onNetworkError", "onDisconnected") ||
+          eventNames === List("onConnected", "onDisconnected"))
+      }
     }
   }
 
@@ -529,7 +543,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "sendWithReply-unserializable-error")
@@ -558,7 +572,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     conf.set("spark.authenticate.secret", "good")
 
     val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345, clientMode = true)
 
     try {
       @volatile var message: String = null
@@ -589,7 +603,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     conf.set("spark.authenticate.secret", "good")
 
     val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345, clientMode = true)
 
     try {
       localEnv.setupEndpoint("ask-authentication", new RpcEndpoint {
diff --git a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
index 4aa75c9230b2..6478ab51c4da 100644
--- a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
@@ -22,9 +22,12 @@ import org.apache.spark.{SSLSampleConfigs, SecurityManager, SparkConf}
 
 class AkkaRpcEnvSuite extends RpcEnvSuite {
 
-  override def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv = {
+  override def createRpcEnv(conf: SparkConf,
+      name: String,
+      port: Int,
+      clientMode: Boolean = false): RpcEnv = {
     new AkkaRpcEnvFactory().create(
-      RpcEnvConfig(conf, name, "localhost", port, new SecurityManager(conf)))
+      RpcEnvConfig(conf, name, "localhost", port, new SecurityManager(conf), clientMode))
   }
 
   test("setupEndpointRef: systemName, address, endpointName") {
@@ -37,7 +40,7 @@ class AkkaRpcEnvSuite extends RpcEnvSuite {
     })
     val conf = new SparkConf()
     val newRpcEnv = new AkkaRpcEnvFactory().create(
-      RpcEnvConfig(conf, "test", "localhost", 12346, new SecurityManager(conf)))
+      RpcEnvConfig(conf, "test", "localhost", 12346, new SecurityManager(conf), false))
     try {
       val newRef = newRpcEnv.setupEndpointRef("local", ref.address, "test_endpoint")
       assert(s"akka.tcp://local@${env.address}/user/test_endpoint" ===
@@ -56,7 +59,7 @@ class AkkaRpcEnvSuite extends RpcEnvSuite {
     val conf = SSLSampleConfigs.sparkSSLConfig()
     val securityManager = new SecurityManager(conf)
     val rpcEnv = new AkkaRpcEnvFactory().create(
-      RpcEnvConfig(conf, "test", "localhost", 12346, securityManager))
+      RpcEnvConfig(conf, "test", "localhost", 12346, securityManager, false))
     try {
       val uri = rpcEnv.uriOf("local", RpcAddress("1.2.3.4", 12345), "test_endpoint")
       assert("akka.ssl.tcp://local@1.2.3.4:12345/user/test_endpoint" === uri)
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
index 973a07a0bde3..56743ba650b4 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcAddressSuite.scala
@@ -22,8 +22,13 @@ import org.apache.spark.SparkFunSuite
 class NettyRpcAddressSuite extends SparkFunSuite {
 
   test("toString") {
-    val addr = RpcEndpointAddress("localhost", 12345, "test")
+    val addr = new RpcEndpointAddress("localhost", 12345, "test")
     assert(addr.toString === "spark://test@localhost:12345")
   }
 
+  test("toString for client mode") {
+    val addr = RpcEndpointAddress(null, "test")
+    assert(addr.toString === "spark-client://test")
+  }
+
 }
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
index be19668e17c0..ce83087ec04d 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcEnvSuite.scala
@@ -22,8 +22,13 @@ import org.apache.spark.rpc._
 
 class NettyRpcEnvSuite extends RpcEnvSuite {
 
-  override def createRpcEnv(conf: SparkConf, name: String, port: Int): RpcEnv = {
-    val config = RpcEnvConfig(conf, "test", "localhost", port, new SecurityManager(conf))
+  override def createRpcEnv(
+      conf: SparkConf,
+      name: String,
+      port: Int,
+      clientMode: Boolean = false): RpcEnv = {
+    val config = RpcEnvConfig(conf, "test", "localhost", port, new SecurityManager(conf),
+      clientMode)
     new NettyRpcEnvFactory().create(config)
   }
 
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
index 5430e4c0c4d6..f9d8e80c98b6 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -30,7 +30,7 @@ import org.apache.spark.rpc._
 class NettyRpcHandlerSuite extends SparkFunSuite {
 
   val env = mock(classOf[NettyRpcEnv])
-  when(env.deserialize(any(classOf[Array[Byte]]))(any())).
+  when(env.deserialize(any(classOf[TransportClient]), any(classOf[Array[Byte]]))(any())).
     thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
 
   test("receive") {
@@ -42,7 +42,7 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
     when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
     nettyRpcHandler.receive(client, null, null)
 
-    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 40000)))
   }
 
   test("connectionTerminated") {
@@ -57,9 +57,9 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
     when(channel.remoteAddress()).thenReturn(new InetSocketAddress("localhost", 40000))
     nettyRpcHandler.connectionTerminated(client)
 
-    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 12345)))
+    verify(dispatcher, times(1)).postToAll(RemoteProcessConnected(RpcAddress("localhost", 40000)))
     verify(dispatcher, times(1)).postToAll(
-      RemoteProcessDisconnected(RpcAddress("localhost", 12345)))
+      RemoteProcessDisconnected(RpcAddress("localhost", 40000)))
   }
 
 }
diff --git a/network/yarn/pom.xml b/network/yarn/pom.xml
index 541ed9a8d0ab..e2360eff5cfe 100644
--- a/network/yarn/pom.xml
+++ b/network/yarn/pom.xml
@@ -54,6 +54,11 @@
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-client</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <scope>provided</scope>
+    </dependency>
   </dependencies>
 
   <build>
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index c6a6d7ac56bf..12ae350e4cef 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -321,7 +321,8 @@ private[spark] class ApplicationMaster(
 
   private def runExecutorLauncher(securityMgr: SecurityManager): Unit = {
     val port = sparkConf.getInt("spark.yarn.am.port", 0)
-    rpcEnv = RpcEnv.create("sparkYarnAM", Utils.localHostName, port, sparkConf, securityMgr)
+    rpcEnv = RpcEnv.create("sparkYarnAM", Utils.localHostName, port, sparkConf, securityMgr,
+      clientMode = true)
     val driverRef = waitForSparkDriver()
     addAmIpFilter()
     registerAM(rpcEnv, driverRef, sparkConf.get("spark.driver.appUIAddress", ""), securityMgr)
@@ -574,9 +575,6 @@ private[spark] class ApplicationMaster(
       case x: AddWebUIFilter =>
         logInfo(s"Add WebUI Filter. $x")
         driver.send(x)
-
-      case DriverHello =>
-        // SPARK-10987: no action needed for this message.
     }
 
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {

From f92f334ca47c03b980b06cf300aa652d0ffa1880 Mon Sep 17 00:00:00 2001
From: Jason White <jason.white@shopify.com>
Date: Mon, 2 Nov 2015 10:49:06 -0800
Subject: [PATCH 444/896] [SPARK-11437] [PYSPARK] Don't .take when converting
 RDD to DataFrame with provided schema

When creating a DataFrame from an RDD in PySpark, `createDataFrame` calls `.take(10)` to verify the first 10 rows of the RDD match the provided schema. Similar to https://issues.apache.org/jira/browse/SPARK-8070, but that issue affected cases where a schema was not provided.

Verifying the first 10 rows is of limited utility and causes the DAG to be executed non-lazily. If necessary, I believe this verification should be done lazily on all rows. However, since the caller is providing a schema to follow, I think it's acceptable to simply fail if the schema is incorrect.

marmbrus We chatted about this at SparkSummitEU. davies you made a similar change for the infer-schema path in https://github.com/apache/spark/pull/6606

Author: Jason White <jason.white@shopify.com>

Closes #9392 from JasonMWhite/createDataFrame_without_take.
---
 python/pyspark/sql/context.py | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/python/pyspark/sql/context.py b/python/pyspark/sql/context.py
index 79453658a167..924bb6433de0 100644
--- a/python/pyspark/sql/context.py
+++ b/python/pyspark/sql/context.py
@@ -318,13 +318,7 @@ def _createFromRDD(self, rdd, schema, samplingRatio):
                     struct.names[i] = name
             schema = struct
 
-        elif isinstance(schema, StructType):
-            # take the first few rows to verify schema
-            rows = rdd.take(10)
-            for row in rows:
-                _verify_type(row, schema)
-
-        else:
+        elif not isinstance(schema, StructType):
             raise TypeError("schema should be StructType or list or None, but got: %s" % schema)
 
         # convert python objects to sql data

From b3aedca6b55c678e40a5961e2fd3af4cb8c52bba Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Mon, 2 Nov 2015 14:36:37 -0600
Subject: [PATCH 445/896] [SPARK-11456][TESTS] Remove deprecated
 junit.framework in Java tests

Replace use of `junit.framework` with `org.junit`, and touch up tests in question

Author: Sean Owen <sowen@cloudera.com>

Closes #9411 from srowen/SPARK-11456.
---
 .../spark/unsafe/bitset/BitSetSuite.java      |  4 +-
 .../unsafe/hash/Murmur3_x86_32Suite.java      | 11 +--
 .../unsafe/types/CalendarIntervalSuite.java   | 78 +++++++++----------
 .../spark/unsafe/types/UTF8StringSuite.java   | 74 +++++++++---------
 4 files changed, 84 insertions(+), 83 deletions(-)

diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java b/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java
index a93fc0ee297c..14e38683df4a 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java
+++ b/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java
@@ -17,7 +17,7 @@
 
 package org.apache.spark.unsafe.bitset;
 
-import junit.framework.Assert;
+import org.junit.Assert;
 import org.junit.Test;
 
 import org.apache.spark.unsafe.memory.MemoryBlock;
@@ -25,7 +25,7 @@
 public class BitSetSuite {
 
   private static BitSet createBitSet(int capacity) {
-    assert capacity % 64 == 0;
+    Assert.assertEquals(0, capacity % 64);
     return new BitSet(MemoryBlock.fromLongArray(new long[capacity / 64]));
   }
 
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/hash/Murmur3_x86_32Suite.java b/unsafe/src/test/java/org/apache/spark/unsafe/hash/Murmur3_x86_32Suite.java
index 2f8cb132ac8b..e759cb33b3e6 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/hash/Murmur3_x86_32Suite.java
+++ b/unsafe/src/test/java/org/apache/spark/unsafe/hash/Murmur3_x86_32Suite.java
@@ -17,12 +17,13 @@
 
 package org.apache.spark.unsafe.hash;
 
+import java.nio.charset.StandardCharsets;
 import java.util.HashSet;
 import java.util.Random;
 import java.util.Set;
 
-import junit.framework.Assert;
 import org.apache.spark.unsafe.Platform;
+import org.junit.Assert;
 import org.junit.Test;
 
 /**
@@ -56,7 +57,7 @@ public void randomizedStressTest() {
     Random rand = new Random();
 
     // A set used to track collision rate.
-    Set<Integer> hashcodes = new HashSet<Integer>();
+    Set<Integer> hashcodes = new HashSet<>();
     for (int i = 0; i < size; i++) {
       int vint = rand.nextInt();
       long lint = rand.nextLong();
@@ -76,7 +77,7 @@ public void randomizedStressTestBytes() {
     Random rand = new Random();
 
     // A set used to track collision rate.
-    Set<Integer> hashcodes = new HashSet<Integer>();
+    Set<Integer> hashcodes = new HashSet<>();
     for (int i = 0; i < size; i++) {
       int byteArrSize = rand.nextInt(100) * 8;
       byte[] bytes = new byte[byteArrSize];
@@ -98,10 +99,10 @@ public void randomizedStressTestBytes() {
   public void randomizedStressTestPaddedStrings() {
     int size = 64000;
     // A set used to track collision rate.
-    Set<Integer> hashcodes = new HashSet<Integer>();
+    Set<Integer> hashcodes = new HashSet<>();
     for (int i = 0; i < size; i++) {
       int byteArrSize = 8;
-      byte[] strBytes = ("" + i).getBytes();
+      byte[] strBytes = String.valueOf(i).getBytes(StandardCharsets.UTF_8);
       byte[] paddedBytes = new byte[byteArrSize];
       System.arraycopy(strBytes, 0, paddedBytes, 0, strBytes.length);
 
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java b/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
index 80d4982c4b57..9e69e264ff28 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
+++ b/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
@@ -19,7 +19,7 @@
 
 import org.junit.Test;
 
-import static junit.framework.Assert.*;
+import static org.junit.Assert.*;
 import static org.apache.spark.unsafe.types.CalendarInterval.*;
 
 public class CalendarIntervalSuite {
@@ -42,19 +42,19 @@ public void toStringTest() {
     CalendarInterval i;
 
     i = new CalendarInterval(34, 0);
-    assertEquals(i.toString(), "interval 2 years 10 months");
+    assertEquals("interval 2 years 10 months", i.toString());
 
     i = new CalendarInterval(-34, 0);
-    assertEquals(i.toString(), "interval -2 years -10 months");
+    assertEquals("interval -2 years -10 months", i.toString());
 
     i = new CalendarInterval(0, 3 * MICROS_PER_WEEK + 13 * MICROS_PER_HOUR + 123);
-    assertEquals(i.toString(), "interval 3 weeks 13 hours 123 microseconds");
+    assertEquals("interval 3 weeks 13 hours 123 microseconds", i.toString());
 
     i = new CalendarInterval(0, -3 * MICROS_PER_WEEK - 13 * MICROS_PER_HOUR - 123);
-    assertEquals(i.toString(), "interval -3 weeks -13 hours -123 microseconds");
+    assertEquals("interval -3 weeks -13 hours -123 microseconds", i.toString());
 
     i = new CalendarInterval(34, 3 * MICROS_PER_WEEK + 13 * MICROS_PER_HOUR + 123);
-    assertEquals(i.toString(), "interval 2 years 10 months 3 weeks 13 hours 123 microseconds");
+    assertEquals("interval 2 years 10 months 3 weeks 13 hours 123 microseconds", i.toString());
   }
 
   @Test
@@ -73,32 +73,32 @@ public void fromStringTest() {
 
     input = "interval   -5  years  23   month";
     CalendarInterval result = new CalendarInterval(-5 * 12 + 23, 0);
-    assertEquals(CalendarInterval.fromString(input), result);
+    assertEquals(fromString(input), result);
 
     input = "interval   -5  years  23   month   ";
-    assertEquals(CalendarInterval.fromString(input), result);
+    assertEquals(fromString(input), result);
 
     input = "  interval   -5  years  23   month   ";
-    assertEquals(CalendarInterval.fromString(input), result);
+    assertEquals(fromString(input), result);
 
     // Error cases
     input = "interval   3month 1 hour";
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
 
     input = "interval 3 moth 1 hour";
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
 
     input = "interval";
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
 
     input = "int";
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
 
     input = "";
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
 
     input = null;
-    assertEquals(CalendarInterval.fromString(input), null);
+    assertNull(fromString(input));
   }
 
   @Test
@@ -108,15 +108,15 @@ public void fromYearMonthStringTest() {
 
     input = "99-10";
     i = new CalendarInterval(99 * 12 + 10, 0L);
-    assertEquals(CalendarInterval.fromYearMonthString(input), i);
+    assertEquals(fromYearMonthString(input), i);
 
     input = "-8-10";
     i = new CalendarInterval(-8 * 12 - 10, 0L);
-    assertEquals(CalendarInterval.fromYearMonthString(input), i);
+    assertEquals(fromYearMonthString(input), i);
 
     try {
       input = "99-15";
-      CalendarInterval.fromYearMonthString(input);
+      fromYearMonthString(input);
       fail("Expected to throw an exception for the invalid input");
     } catch (IllegalArgumentException e) {
       assertTrue(e.getMessage().contains("month 15 outside range"));
@@ -131,19 +131,19 @@ public void fromDayTimeStringTest() {
     input = "5 12:40:30.999999999";
     i = new CalendarInterval(0, 5 * MICROS_PER_DAY + 12 * MICROS_PER_HOUR +
       40 * MICROS_PER_MINUTE + 30 * MICROS_PER_SECOND + 999999L);
-    assertEquals(CalendarInterval.fromDayTimeString(input), i);
+    assertEquals(fromDayTimeString(input), i);
 
     input = "10 0:12:0.888";
     i = new CalendarInterval(0, 10 * MICROS_PER_DAY + 12 * MICROS_PER_MINUTE);
-    assertEquals(CalendarInterval.fromDayTimeString(input), i);
+    assertEquals(fromDayTimeString(input), i);
 
     input = "-3 0:0:0";
     i = new CalendarInterval(0, -3 * MICROS_PER_DAY);
-    assertEquals(CalendarInterval.fromDayTimeString(input), i);
+    assertEquals(fromDayTimeString(input), i);
 
     try {
       input = "5 30:12:20";
-      CalendarInterval.fromDayTimeString(input);
+      fromDayTimeString(input);
       fail("Expected to throw an exception for the invalid input");
     } catch (IllegalArgumentException e) {
       assertTrue(e.getMessage().contains("hour 30 outside range"));
@@ -151,7 +151,7 @@ public void fromDayTimeStringTest() {
 
     try {
       input = "5 30-12";
-      CalendarInterval.fromDayTimeString(input);
+      fromDayTimeString(input);
       fail("Expected to throw an exception for the invalid input");
     } catch (IllegalArgumentException e) {
       assertTrue(e.getMessage().contains("not match day-time format"));
@@ -165,19 +165,19 @@ public void fromSingleUnitStringTest() {
 
     input = "12";
     i = new CalendarInterval(12 * 12, 0L);
-    assertEquals(CalendarInterval.fromSingleUnitString("year", input), i);
+    assertEquals(fromSingleUnitString("year", input), i);
 
     input = "100";
     i = new CalendarInterval(0, 100 * MICROS_PER_DAY);
-    assertEquals(CalendarInterval.fromSingleUnitString("day", input), i);
+    assertEquals(fromSingleUnitString("day", input), i);
 
     input = "1999.38888";
     i = new CalendarInterval(0, 1999 * MICROS_PER_SECOND + 38);
-    assertEquals(CalendarInterval.fromSingleUnitString("second", input), i);
+    assertEquals(fromSingleUnitString("second", input), i);
 
     try {
       input = String.valueOf(Integer.MAX_VALUE);
-      CalendarInterval.fromSingleUnitString("year", input);
+      fromSingleUnitString("year", input);
       fail("Expected to throw an exception for the invalid input");
     } catch (IllegalArgumentException e) {
       assertTrue(e.getMessage().contains("outside range"));
@@ -185,7 +185,7 @@ public void fromSingleUnitStringTest() {
 
     try {
       input = String.valueOf(Long.MAX_VALUE / MICROS_PER_HOUR + 1);
-      CalendarInterval.fromSingleUnitString("hour", input);
+      fromSingleUnitString("hour", input);
       fail("Expected to throw an exception for the invalid input");
     } catch (IllegalArgumentException e) {
       assertTrue(e.getMessage().contains("outside range"));
@@ -197,16 +197,16 @@ public void addTest() {
     String input = "interval 3 month 1 hour";
     String input2 = "interval 2 month 100 hour";
 
-    CalendarInterval interval = CalendarInterval.fromString(input);
-    CalendarInterval interval2 = CalendarInterval.fromString(input2);
+    CalendarInterval interval = fromString(input);
+    CalendarInterval interval2 = fromString(input2);
 
     assertEquals(interval.add(interval2), new CalendarInterval(5, 101 * MICROS_PER_HOUR));
 
     input = "interval -10 month -81 hour";
     input2 = "interval 75 month 200 hour";
 
-    interval = CalendarInterval.fromString(input);
-    interval2 = CalendarInterval.fromString(input2);
+    interval = fromString(input);
+    interval2 = fromString(input2);
 
     assertEquals(interval.add(interval2), new CalendarInterval(65, 119 * MICROS_PER_HOUR));
   }
@@ -216,25 +216,25 @@ public void subtractTest() {
     String input = "interval 3 month 1 hour";
     String input2 = "interval 2 month 100 hour";
 
-    CalendarInterval interval = CalendarInterval.fromString(input);
-    CalendarInterval interval2 = CalendarInterval.fromString(input2);
+    CalendarInterval interval = fromString(input);
+    CalendarInterval interval2 = fromString(input2);
 
     assertEquals(interval.subtract(interval2), new CalendarInterval(1, -99 * MICROS_PER_HOUR));
 
     input = "interval -10 month -81 hour";
     input2 = "interval 75 month 200 hour";
 
-    interval = CalendarInterval.fromString(input);
-    interval2 = CalendarInterval.fromString(input2);
+    interval = fromString(input);
+    interval2 = fromString(input2);
 
     assertEquals(interval.subtract(interval2), new CalendarInterval(-85, -281 * MICROS_PER_HOUR));
   }
 
-  private void testSingleUnit(String unit, int number, int months, long microseconds) {
+  private static void testSingleUnit(String unit, int number, int months, long microseconds) {
     String input1 = "interval " + number + " " + unit;
     String input2 = "interval " + number + " " + unit + "s";
     CalendarInterval result = new CalendarInterval(months, microseconds);
-    assertEquals(CalendarInterval.fromString(input1), result);
-    assertEquals(CalendarInterval.fromString(input2), result);
+    assertEquals(fromString(input1), result);
+    assertEquals(fromString(input2), result);
   }
 }
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/types/UTF8StringSuite.java b/unsafe/src/test/java/org/apache/spark/unsafe/types/UTF8StringSuite.java
index 98aa8a2469a7..e21ffdcff9ab 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/types/UTF8StringSuite.java
+++ b/unsafe/src/test/java/org/apache/spark/unsafe/types/UTF8StringSuite.java
@@ -24,13 +24,13 @@
 import com.google.common.collect.ImmutableMap;
 import org.junit.Test;
 
-import static junit.framework.Assert.*;
+import static org.junit.Assert.*;
 
 import static org.apache.spark.unsafe.types.UTF8String.*;
 
 public class UTF8StringSuite {
 
-  private void checkBasic(String str, int len) throws UnsupportedEncodingException {
+  private static void checkBasic(String str, int len) throws UnsupportedEncodingException {
     UTF8String s1 = fromString(str);
     UTF8String s2 = fromBytes(str.getBytes("utf8"));
     assertEquals(s1.numChars(), len);
@@ -42,12 +42,12 @@ private void checkBasic(String str, int len) throws UnsupportedEncodingException
 
     assertEquals(s1.hashCode(), s2.hashCode());
 
-    assertEquals(s1.compareTo(s2), 0);
+    assertEquals(0, s1.compareTo(s2));
 
-    assertEquals(s1.contains(s2), true);
-    assertEquals(s2.contains(s1), true);
-    assertEquals(s1.startsWith(s1), true);
-    assertEquals(s1.endsWith(s1), true);
+    assertTrue(s1.contains(s2));
+    assertTrue(s2.contains(s1));
+    assertTrue(s1.startsWith(s1));
+    assertTrue(s1.endsWith(s1));
   }
 
   @Test
@@ -59,8 +59,8 @@ public void basicTest() throws UnsupportedEncodingException {
 
   @Test
   public void emptyStringTest() {
-    assertEquals(fromString(""), EMPTY_UTF8);
-    assertEquals(fromBytes(new byte[0]), EMPTY_UTF8);
+    assertEquals(EMPTY_UTF8, fromString(""));
+    assertEquals(EMPTY_UTF8, fromBytes(new byte[0]));
     assertEquals(0, EMPTY_UTF8.numChars());
     assertEquals(0, EMPTY_UTF8.numBytes());
   }
@@ -76,9 +76,9 @@ public void prefix() {
 
     byte[] buf1 = {1, 2, 3, 4, 5, 6, 7, 8, 9};
     byte[] buf2 = {1, 2, 3};
-    UTF8String str1 = UTF8String.fromBytes(buf1, 0, 3);
-    UTF8String str2 = UTF8String.fromBytes(buf1, 0, 8);
-    UTF8String str3 = UTF8String.fromBytes(buf2);
+    UTF8String str1 = fromBytes(buf1, 0, 3);
+    UTF8String str2 = fromBytes(buf1, 0, 8);
+    UTF8String str3 = fromBytes(buf2);
     assertTrue(str1.getPrefix() - str2.getPrefix() < 0);
     assertEquals(str1.getPrefix(), str3.getPrefix());
   }
@@ -98,7 +98,7 @@ public void compareTo() {
     assertTrue(fromString("你好123").compareTo(fromString("你好122")) > 0);
   }
 
-  protected void testUpperandLower(String upper, String lower) {
+  protected static void testUpperandLower(String upper, String lower) {
     UTF8String us = fromString(upper);
     UTF8String ls = fromString(lower);
     assertEquals(ls, us.toLowerCase());
@@ -127,22 +127,22 @@ public void titleCase() {
   @Test
   public void concatTest() {
     assertEquals(EMPTY_UTF8, concat());
-    assertEquals(null, concat((UTF8String) null));
+    assertNull(concat((UTF8String) null));
     assertEquals(EMPTY_UTF8, concat(EMPTY_UTF8));
     assertEquals(fromString("ab"), concat(fromString("ab")));
     assertEquals(fromString("ab"), concat(fromString("a"), fromString("b")));
     assertEquals(fromString("abc"), concat(fromString("a"), fromString("b"), fromString("c")));
-    assertEquals(null, concat(fromString("a"), null, fromString("c")));
-    assertEquals(null, concat(fromString("a"), null, null));
-    assertEquals(null, concat(null, null, null));
+    assertNull(concat(fromString("a"), null, fromString("c")));
+    assertNull(concat(fromString("a"), null, null));
+    assertNull(concat(null, null, null));
     assertEquals(fromString("数据砖头"), concat(fromString("数据"), fromString("砖头")));
   }
 
   @Test
   public void concatWsTest() {
     // Returns null if the separator is null
-    assertEquals(null, concatWs(null, (UTF8String)null));
-    assertEquals(null, concatWs(null, fromString("a")));
+    assertNull(concatWs(null, (UTF8String) null));
+    assertNull(concatWs(null, fromString("a")));
 
     // If separator is null, concatWs should skip all null inputs and never return null.
     UTF8String sep = fromString("哈哈");
@@ -381,16 +381,16 @@ public void split() {
   
   @Test
   public void levenshteinDistance() {
-    assertEquals(EMPTY_UTF8.levenshteinDistance(EMPTY_UTF8), 0);
-    assertEquals(EMPTY_UTF8.levenshteinDistance(fromString("a")), 1);
-    assertEquals(fromString("aaapppp").levenshteinDistance(EMPTY_UTF8), 7);
-    assertEquals(fromString("frog").levenshteinDistance(fromString("fog")), 1);
-    assertEquals(fromString("fly").levenshteinDistance(fromString("ant")),3);
-    assertEquals(fromString("elephant").levenshteinDistance(fromString("hippo")), 7);
-    assertEquals(fromString("hippo").levenshteinDistance(fromString("elephant")), 7);
-    assertEquals(fromString("hippo").levenshteinDistance(fromString("zzzzzzzz")), 8);
-    assertEquals(fromString("hello").levenshteinDistance(fromString("hallo")),1);
-    assertEquals(fromString("世界千世").levenshteinDistance(fromString("千a世b")),4);
+    assertEquals(0, EMPTY_UTF8.levenshteinDistance(EMPTY_UTF8));
+    assertEquals(1, EMPTY_UTF8.levenshteinDistance(fromString("a")));
+    assertEquals(7, fromString("aaapppp").levenshteinDistance(EMPTY_UTF8));
+    assertEquals(1, fromString("frog").levenshteinDistance(fromString("fog")));
+    assertEquals(3, fromString("fly").levenshteinDistance(fromString("ant")));
+    assertEquals(7, fromString("elephant").levenshteinDistance(fromString("hippo")));
+    assertEquals(7, fromString("hippo").levenshteinDistance(fromString("elephant")));
+    assertEquals(8, fromString("hippo").levenshteinDistance(fromString("zzzzzzzz")));
+    assertEquals(1, fromString("hello").levenshteinDistance(fromString("hallo")));
+    assertEquals(4, fromString("世界千世").levenshteinDistance(fromString("千a世b")));
   }
 
   @Test
@@ -432,14 +432,14 @@ public void createBlankString() {
 
   @Test
   public void findInSet() {
-    assertEquals(fromString("ab").findInSet(fromString("ab")), 1);
-    assertEquals(fromString("a,b").findInSet(fromString("b")), 2);
-    assertEquals(fromString("abc,b,ab,c,def").findInSet(fromString("ab")), 3);
-    assertEquals(fromString("ab,abc,b,ab,c,def").findInSet(fromString("ab")), 1);
-    assertEquals(fromString(",,,ab,abc,b,ab,c,def").findInSet(fromString("ab")), 4);
-    assertEquals(fromString(",ab,abc,b,ab,c,def").findInSet(fromString("")), 1);
-    assertEquals(fromString("数据砖头,abc,b,ab,c,def").findInSet(fromString("ab")), 4);
-    assertEquals(fromString("数据砖头,abc,b,ab,c,def").findInSet(fromString("def")), 6);
+    assertEquals(1, fromString("ab").findInSet(fromString("ab")));
+    assertEquals(2, fromString("a,b").findInSet(fromString("b")));
+    assertEquals(3, fromString("abc,b,ab,c,def").findInSet(fromString("ab")));
+    assertEquals(1, fromString("ab,abc,b,ab,c,def").findInSet(fromString("ab")));
+    assertEquals(4, fromString(",,,ab,abc,b,ab,c,def").findInSet(fromString("ab")));
+    assertEquals(1, fromString(",ab,abc,b,ab,c,def").findInSet(fromString("")));
+    assertEquals(4, fromString("数据砖头,abc,b,ab,c,def").findInSet(fromString("ab")));
+    assertEquals(6, fromString("数据砖头,abc,b,ab,c,def").findInSet(fromString("def")));
   }
 
   @Test

From 33ae7a35daa86c34f1f9f72f997e0c2d4cd8abec Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Mon, 2 Nov 2015 13:42:16 -0800
Subject: [PATCH 446/896] [SPARK-11358][MLLIB] deprecate runs in k-means

This PR deprecates `runs` in k-means. `runs` introduces extra complexity and overhead in MLlib's k-means implementation. I haven't seen much usage with `runs` not equal to `1`. We don't have a unit test for it either. We can deprecate this method in 1.6, and void it in 1.7. It helps us simplify the implementation.

cc: srowen

Author: Xiangrui Meng <meng@databricks.com>

Closes #9322 from mengxr/SPARK-11358.
---
 .../main/scala/org/apache/spark/mllib/clustering/KMeans.scala | 4 ++--
 python/pyspark/mllib/clustering.py                            | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
index 7168aac32c99..2895db7c9061 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
@@ -107,7 +107,7 @@ class KMeans private (
    * Number of runs of the algorithm to execute in parallel.
    */
   @Since("1.4.0")
-  @Experimental
+  @deprecated("Support for runs is deprecated. This param will have no effect in 1.7.0.", "1.6.0")
   def getRuns: Int = runs
 
   /**
@@ -117,7 +117,7 @@ class KMeans private (
    * return the best clustering found over any run. Default: 1.
    */
   @Since("0.8.0")
-  @Experimental
+  @deprecated("Support for runs is deprecated. This param will have no effect in 1.7.0.", "1.6.0")
   def setRuns(runs: Int): this.type = {
     if (runs <= 0) {
       throw new IllegalArgumentException("Number of runs must be positive")
diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index d1c3755a785f..8629aa5a1716 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -17,6 +17,7 @@
 
 import sys
 import array as pyarray
+import warnings
 
 if sys.version > '3':
     xrange = range
@@ -170,6 +171,9 @@ class KMeans(object):
     def train(cls, rdd, k, maxIterations=100, runs=1, initializationMode="k-means||",
               seed=None, initializationSteps=5, epsilon=1e-4, initialModel=None):
         """Train a k-means clustering model."""
+        if runs != 1:
+            warnings.warn(
+                "Support for runs is deprecated in 1.6.0. This param will have no effect in 1.7.0.")
         clusterInitialModel = []
         if initialModel is not None:
             if not isinstance(initialModel, KMeansModel):

From db11ee5e56e5fac59895c772a9a87c5ac86888ef Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Mon, 2 Nov 2015 13:51:53 -0800
Subject: [PATCH 447/896] [SPARK-11371] Make "mean" an alias for "avg" operator

From Reynold in the thread 'Exception when using some aggregate operators' (http://search-hadoop.com/m/q3RTt0xFr22nXB4/):

I don't think these are bugs. The SQL standard for average is "avg", not "mean". Similarly, a distinct count is supposed to be written as "count(distinct col)", not "countDistinct(col)".
We can, however, make "mean" an alias for "avg" to improve compatibility between DataFrame and SQL.

Author: tedyu <yuzhihong@gmail.com>

Closes #9332 from ted-yu/master.
---
 .../spark/sql/catalyst/analysis/FunctionRegistry.scala   | 1 +
 .../spark/sql/hive/execution/AggregationQuerySuite.scala | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index 5f3ec74ac0d9..24c1a7b7ac5a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -185,6 +185,7 @@ object FunctionRegistry {
     expression[Last]("last"),
     expression[Last]("last_value"),
     expression[Max]("max"),
+    expression[Average]("mean"),
     expression[Min]("min"),
     expression[Stddev]("stddev"),
     expression[StddevPop]("stddev_pop"),
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 0cf0e0aab9eb..74061db0f28a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -298,6 +298,15 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         """.stripMargin),
       Row(1, 20.0) :: Row(2, -0.5) :: Row(3, null) :: Row(null, 10.0) :: Nil)
 
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT key, mean(value)
+          |FROM agg1
+          |GROUP BY key
+        """.stripMargin),
+      Row(1, 20.0) :: Row(2, -0.5) :: Row(3, null) :: Row(null, 10.0) :: Nil)
+
     checkAnswer(
       sqlContext.sql(
         """

From 2804674a7af8f11eeb1280459bc9145815398eed Mon Sep 17 00:00:00 2001
From: Rishabh Bhardwaj <rbnext29@gmail.com>
Date: Mon, 2 Nov 2015 14:03:50 -0800
Subject: [PATCH 448/896] [SPARK-11383][DOCS] Replaced example code in
 mllib-naive-bayes.md/mllib-isotonic-regression.md using include_example

I have made the required changes in mllib-naive-bayes.md/mllib-isotonic-regression.md and also verified them.
Kindle Review it.

Author: Rishabh Bhardwaj <rbnext29@gmail.com>

Closes #9353 from rishabhbhardwaj/SPARK-11383.
---
 docs/mllib-isotonic-regression.md             | 124 +-----------------
 docs/mllib-naive-bayes.md                     |  89 +------------
 .../mllib/JavaIsotonicRegressionExample.java  |  86 ++++++++++++
 .../examples/mllib/JavaNaiveBayesExample.java |  64 +++++++++
 .../mllib/isotonic_regression_example.py      |  56 ++++++++
 .../main/python/mllib/naive_bayes_example.py  |  56 ++++++++
 .../mllib/IsotonicRegressionExample.scala     |  66 ++++++++++
 .../examples/mllib/NaiveBayesExample.scala    |  57 ++++++++
 8 files changed, 391 insertions(+), 207 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaIsotonicRegressionExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaNaiveBayesExample.java
 create mode 100644 examples/src/main/python/mllib/isotonic_regression_example.py
 create mode 100644 examples/src/main/python/mllib/naive_bayes_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/IsotonicRegressionExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala

diff --git a/docs/mllib-isotonic-regression.md b/docs/mllib-isotonic-regression.md
index f91a697b3189..85f9226b4341 100644
--- a/docs/mllib-isotonic-regression.md
+++ b/docs/mllib-isotonic-regression.md
@@ -61,42 +61,8 @@ labels and real labels in the test set.
 
 Refer to the [`IsotonicRegression` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.IsotonicRegression) and [`IsotonicRegressionModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.regression.IsotonicRegressionModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.regression.{IsotonicRegression, IsotonicRegressionModel}
-
-val data = sc.textFile("data/mllib/sample_isotonic_regression_data.txt")
-
-// Create label, feature, weight tuples from input data with weight set to default value 1.0.
-val parsedData = data.map { line =>
-  val parts = line.split(',').map(_.toDouble)
-  (parts(0), parts(1), 1.0)
-}
-
-// Split data into training (60%) and test (40%) sets.
-val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
-val training = splits(0)
-val test = splits(1)
-
-// Create isotonic regression model from training data.
-// Isotonic parameter defaults to true so it is only shown for demonstration
-val model = new IsotonicRegression().setIsotonic(true).run(training)
-
-// Create tuples of predicted and real labels.
-val predictionAndLabel = test.map { point =>
-  val predictedLabel = model.predict(point._2)
-  (predictedLabel, point._1)
-}
-
-// Calculate mean squared error between predicted and real labels.
-val meanSquaredError = predictionAndLabel.map{case(p, l) => math.pow((p - l), 2)}.mean()
-println("Mean Squared Error = " + meanSquaredError)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = IsotonicRegressionModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/IsotonicRegressionExample.scala %}
 </div>
-
 <div data-lang="java" markdown="1">
 Data are read from a file where each line has a format label,feature
 i.e. 4710.28,500.00. The data are split to training and testing set.
@@ -105,66 +71,8 @@ labels and real labels in the test set.
 
 Refer to the [`IsotonicRegression` Java docs](api/java/org/apache/spark/mllib/regression/IsotonicRegression.html) and [`IsotonicRegressionModel` Java docs](api/java/org/apache/spark/mllib/regression/IsotonicRegressionModel.html) for details on the API.
 
-{% highlight java %}
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaDoubleRDD;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.IsotonicRegressionModel;
-import scala.Tuple2;
-import scala.Tuple3;
-
-JavaRDD<String> data = sc.textFile("data/mllib/sample_isotonic_regression_data.txt");
-
-// Create label, feature, weight tuples from input data with weight set to default value 1.0.
-JavaRDD<Tuple3<Double, Double, Double>> parsedData = data.map(
-  new Function<String, Tuple3<Double, Double, Double>>() {
-    public Tuple3<Double, Double, Double> call(String line) {
-      String[] parts = line.split(",");
-      return new Tuple3<>(new Double(parts[0]), new Double(parts[1]), 1.0);
-    }
-  }
-);
-
-// Split data into training (60%) and test (40%) sets.
-JavaRDD<Tuple3<Double, Double, Double>>[] splits = parsedData.randomSplit(new double[] {0.6, 0.4}, 11L);
-JavaRDD<Tuple3<Double, Double, Double>> training = splits[0];
-JavaRDD<Tuple3<Double, Double, Double>> test = splits[1];
-
-// Create isotonic regression model from training data.
-// Isotonic parameter defaults to true so it is only shown for demonstration
-IsotonicRegressionModel model = new IsotonicRegression().setIsotonic(true).run(training);
-
-// Create tuples of predicted and real labels.
-JavaPairRDD<Double, Double> predictionAndLabel = test.mapToPair(
-  new PairFunction<Tuple3<Double, Double, Double>, Double, Double>() {
-    @Override public Tuple2<Double, Double> call(Tuple3<Double, Double, Double> point) {
-      Double predictedLabel = model.predict(point._2());
-      return new Tuple2<Double, Double>(predictedLabel, point._1());
-    }
-  }
-);
-
-// Calculate mean squared error between predicted and real labels.
-Double meanSquaredError = new JavaDoubleRDD(predictionAndLabel.map(
-  new Function<Tuple2<Double, Double>, Object>() {
-    @Override public Object call(Tuple2<Double, Double> pl) {
-      return Math.pow(pl._1() - pl._2(), 2);
-    }
-  }
-).rdd()).mean();
-
-System.out.println("Mean Squared Error = " + meanSquaredError);
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-IsotonicRegressionModel sameModel = IsotonicRegressionModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaIsotonicRegressionExample.java %}
 </div>
-
 <div data-lang="python" markdown="1">
 Data are read from a file where each line has a format label,feature
 i.e. 4710.28,500.00. The data are split to training and testing set.
@@ -173,32 +81,6 @@ labels and real labels in the test set.
 
 Refer to the [`IsotonicRegression` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.IsotonicRegression) and [`IsotonicRegressionModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.regression.IsotonicRegressionModel) for more details on the API.
 
-{% highlight python %}
-import math
-from pyspark.mllib.regression import IsotonicRegression, IsotonicRegressionModel
-
-data = sc.textFile("data/mllib/sample_isotonic_regression_data.txt")
-
-# Create label, feature, weight tuples from input data with weight set to default value 1.0.
-parsedData = data.map(lambda line: tuple([float(x) for x in line.split(',')]) + (1.0,))
-
-# Split data into training (60%) and test (40%) sets.
-training, test = parsedData.randomSplit([0.6, 0.4], 11)
-
-# Create isotonic regression model from training data.
-# Isotonic parameter defaults to true so it is only shown for demonstration
-model = IsotonicRegression.train(training)
-
-# Create tuples of predicted and real labels.
-predictionAndLabel = test.map(lambda p: (model.predict(p[1]), p[0]))
-
-# Calculate mean squared error between predicted and real labels.
-meanSquaredError = predictionAndLabel.map(lambda pl: math.pow((pl[0] - pl[1]), 2)).mean()
-print("Mean Squared Error = " + str(meanSquaredError))
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = IsotonicRegressionModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/isotonic_regression_example.py %}
 </div>
 </div>
diff --git a/docs/mllib-naive-bayes.md b/docs/mllib-naive-bayes.md
index f4f6a10c8299..60ac6c7e5bb1 100644
--- a/docs/mllib-naive-bayes.md
+++ b/docs/mllib-naive-bayes.md
@@ -40,32 +40,8 @@ can be used for evaluation and prediction.
 
 Refer to the [`NaiveBayes` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.NaiveBayes) and [`NaiveBayesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.NaiveBayesModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.classification.{NaiveBayes, NaiveBayesModel}
-import org.apache.spark.mllib.linalg.Vectors
-import org.apache.spark.mllib.regression.LabeledPoint
-
-val data = sc.textFile("data/mllib/sample_naive_bayes_data.txt")
-val parsedData = data.map { line =>
-  val parts = line.split(',')
-  LabeledPoint(parts(0).toDouble, Vectors.dense(parts(1).split(' ').map(_.toDouble)))
-}
-// Split data into training (60%) and test (40%).
-val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
-val training = splits(0)
-val test = splits(1)
-
-val model = NaiveBayes.train(training, lambda = 1.0, modelType = "multinomial")
-
-val predictionAndLabel = test.map(p => (model.predict(p.features), p.label))
-val accuracy = 1.0 * predictionAndLabel.filter(x => x._1 == x._2).count() / test.count()
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = NaiveBayesModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala %}
 </div>
-
 <div data-lang="java" markdown="1">
 
 [NaiveBayes](api/java/org/apache/spark/mllib/classification/NaiveBayes.html) implements
@@ -77,40 +53,8 @@ can be used for evaluation and prediction.
 
 Refer to the [`NaiveBayes` Java docs](api/java/org/apache/spark/mllib/classification/NaiveBayes.html) and [`NaiveBayesModel` Java docs](api/java/org/apache/spark/mllib/classification/NaiveBayesModel.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.classification.NaiveBayes;
-import org.apache.spark.mllib.classification.NaiveBayesModel;
-import org.apache.spark.mllib.regression.LabeledPoint;
-
-JavaRDD<LabeledPoint> training = ... // training set
-JavaRDD<LabeledPoint> test = ... // test set
-
-final NaiveBayesModel model = NaiveBayes.train(training.rdd(), 1.0);
-
-JavaPairRDD<Double, Double> predictionAndLabel = 
-  test.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-double accuracy = predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
-    @Override public Boolean call(Tuple2<Double, Double> pl) {
-      return pl._1().equals(pl._2());
-    }
-  }).count() / (double) test.count();
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-NaiveBayesModel sameModel = NaiveBayesModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaNaiveBayesExample.java %}
 </div>
-
 <div data-lang="python" markdown="1">
 
 [NaiveBayes](api/python/pyspark.mllib.html#pyspark.mllib.classification.NaiveBayes) implements multinomial
@@ -124,33 +68,6 @@ Note that the Python API does not yet support model save/load but will in the fu
 
 Refer to the [`NaiveBayes` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.NaiveBayes) and [`NaiveBayesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.NaiveBayesModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.classification import NaiveBayes, NaiveBayesModel
-from pyspark.mllib.linalg import Vectors
-from pyspark.mllib.regression import LabeledPoint
-
-def parseLine(line):
-    parts = line.split(',')
-    label = float(parts[0])
-    features = Vectors.dense([float(x) for x in parts[1].split(' ')])
-    return LabeledPoint(label, features)
-
-data = sc.textFile('data/mllib/sample_naive_bayes_data.txt').map(parseLine)
-
-# Split data aproximately into training (60%) and test (40%)
-training, test = data.randomSplit([0.6, 0.4], seed = 0)
-
-# Train a naive Bayes model.
-model = NaiveBayes.train(training, 1.0)
-
-# Make prediction and test accuracy.
-predictionAndLabel = test.map(lambda p : (model.predict(p.features), p.label))
-accuracy = 1.0 * predictionAndLabel.filter(lambda (x, v): x == v).count() / test.count()
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = NaiveBayesModel.load(sc, "myModelPath")
-{% endhighlight %}
-
+{% include_example python/mllib/naive_bayes_example.py %}
 </div>
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaIsotonicRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaIsotonicRegressionExample.java
new file mode 100644
index 000000000000..37e709b4cbc0
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaIsotonicRegressionExample.java
@@ -0,0 +1,86 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+import scala.Tuple3;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.api.java.JavaDoubleRDD;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.mllib.regression.IsotonicRegression;
+import org.apache.spark.mllib.regression.IsotonicRegressionModel;
+// $example off$
+import org.apache.spark.SparkConf;
+
+public class JavaIsotonicRegressionExample {
+  public static void main(String[] args) {
+    SparkConf sparkConf = new SparkConf().setAppName("JavaIsotonicRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+    // $example on$
+    JavaRDD<String> data = jsc.textFile("data/mllib/sample_isotonic_regression_data.txt");
+
+    // Create label, feature, weight tuples from input data with weight set to default value 1.0.
+    JavaRDD<Tuple3<Double, Double, Double>> parsedData = data.map(
+      new Function<String, Tuple3<Double, Double, Double>>() {
+        public Tuple3<Double, Double, Double> call(String line) {
+          String[] parts = line.split(",");
+          return new Tuple3<>(new Double(parts[0]), new Double(parts[1]), 1.0);
+        }
+      }
+    );
+
+    // Split data into training (60%) and test (40%) sets.
+    JavaRDD<Tuple3<Double, Double, Double>>[] splits = parsedData.randomSplit(new double[]{0.6, 0.4}, 11L);
+    JavaRDD<Tuple3<Double, Double, Double>> training = splits[0];
+    JavaRDD<Tuple3<Double, Double, Double>> test = splits[1];
+
+    // Create isotonic regression model from training data.
+    // Isotonic parameter defaults to true so it is only shown for demonstration
+    final IsotonicRegressionModel model = new IsotonicRegression().setIsotonic(true).run(training);
+
+    // Create tuples of predicted and real labels.
+    JavaPairRDD<Double, Double> predictionAndLabel = test.mapToPair(
+      new PairFunction<Tuple3<Double, Double, Double>, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(Tuple3<Double, Double, Double> point) {
+          Double predictedLabel = model.predict(point._2());
+          return new Tuple2<Double, Double>(predictedLabel, point._1());
+        }
+      }
+    );
+
+    // Calculate mean squared error between predicted and real labels.
+    Double meanSquaredError = new JavaDoubleRDD(predictionAndLabel.map(
+      new Function<Tuple2<Double, Double>, Object>() {
+        @Override
+        public Object call(Tuple2<Double, Double> pl) {
+          return Math.pow(pl._1() - pl._2(), 2);
+        }
+      }
+    ).rdd()).mean();
+    System.out.println("Mean Squared Error = " + meanSquaredError);
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myIsotonicRegressionModel");
+    IsotonicRegressionModel sameModel = IsotonicRegressionModel.load(jsc.sc(), "target/tmp/myIsotonicRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaNaiveBayesExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaNaiveBayesExample.java
new file mode 100644
index 000000000000..e6a5904bd71f
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaNaiveBayesExample.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.mllib.classification.NaiveBayes;
+import org.apache.spark.mllib.classification.NaiveBayesModel;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+import org.apache.spark.SparkConf;
+
+public class JavaNaiveBayesExample {
+  public static void main(String[] args) {
+    SparkConf sparkConf = new SparkConf().setAppName("JavaNaiveBayesExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+    // $example on$
+    String path = "data/mllib/sample_naive_bayes_data.txt";
+    JavaRDD<LabeledPoint> inputData = MLUtils.loadLibSVMFile(jsc.sc(), path).toJavaRDD();
+    JavaRDD<LabeledPoint>[] tmp = inputData.randomSplit(new double[]{0.6, 0.4}, 12345);
+    JavaRDD<LabeledPoint> training = tmp[0]; // training set
+    JavaRDD<LabeledPoint> test = tmp[1]; // test set
+    final NaiveBayesModel model = NaiveBayes.train(training.rdd(), 1.0);
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      test.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    double accuracy = predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
+      @Override
+      public Boolean call(Tuple2<Double, Double> pl) {
+        return pl._1().equals(pl._2());
+      }
+    }).count() / (double) test.count();
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myNaiveBayesModel");
+    NaiveBayesModel sameModel = NaiveBayesModel.load(jsc.sc(), "target/tmp/myNaiveBayesModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/isotonic_regression_example.py b/examples/src/main/python/mllib/isotonic_regression_example.py
new file mode 100644
index 000000000000..89dc9f4b6611
--- /dev/null
+++ b/examples/src/main/python/mllib/isotonic_regression_example.py
@@ -0,0 +1,56 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Isotonic Regression Example.
+"""
+from __future__ import print_function
+
+from pyspark import SparkContext
+# $example on$
+import math
+from pyspark.mllib.regression import IsotonicRegression, IsotonicRegressionModel
+# $example off$
+
+if __name__ == "__main__":
+
+    sc = SparkContext(appName="PythonIsotonicRegressionExample")
+
+    # $example on$
+    data = sc.textFile("data/mllib/sample_isotonic_regression_data.txt")
+
+    # Create label, feature, weight tuples from input data with weight set to default value 1.0.
+    parsedData = data.map(lambda line: tuple([float(x) for x in line.split(',')]) + (1.0,))
+
+    # Split data into training (60%) and test (40%) sets.
+    training, test = parsedData.randomSplit([0.6, 0.4], 11)
+
+    # Create isotonic regression model from training data.
+    # Isotonic parameter defaults to true so it is only shown for demonstration
+    model = IsotonicRegression.train(training)
+
+    # Create tuples of predicted and real labels.
+    predictionAndLabel = test.map(lambda p: (model.predict(p[1]), p[0]))
+
+    # Calculate mean squared error between predicted and real labels.
+    meanSquaredError = predictionAndLabel.map(lambda pl: math.pow((pl[0] - pl[1]), 2)).mean()
+    print("Mean Squared Error = " + str(meanSquaredError))
+
+    # Save and load model
+    model.save(sc, "target/tmp/myIsotonicRegressionModel")
+    sameModel = IsotonicRegressionModel.load(sc, "target/tmp/myIsotonicRegressionModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/naive_bayes_example.py b/examples/src/main/python/mllib/naive_bayes_example.py
new file mode 100644
index 000000000000..a2e7dacf2549
--- /dev/null
+++ b/examples/src/main/python/mllib/naive_bayes_example.py
@@ -0,0 +1,56 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+NaiveBayes Example.
+"""
+from __future__ import print_function
+
+# $example on$
+from pyspark.mllib.classification import NaiveBayes, NaiveBayesModel
+from pyspark.mllib.linalg import Vectors
+from pyspark.mllib.regression import LabeledPoint
+
+
+def parseLine(line):
+    parts = line.split(',')
+    label = float(parts[0])
+    features = Vectors.dense([float(x) for x in parts[1].split(' ')])
+    return LabeledPoint(label, features)
+# $example off$
+
+if __name__ == "__main__":
+
+    sc = SparkContext(appName="PythonNaiveBayesExample")
+
+    # $example on$
+    data = sc.textFile('data/mllib/sample_naive_bayes_data.txt').map(parseLine)
+
+    # Split data aproximately into training (60%) and test (40%)
+    training, test = data.randomSplit([0.6, 0.4], seed=0)
+
+    # Train a naive Bayes model.
+    model = NaiveBayes.train(training, 1.0)
+
+    # Make prediction and test accuracy.
+    predictionAndLabel = test.map(lambda p: (model.predict(p.features), p.label))
+    accuracy = 1.0 * predictionAndLabel.filter(lambda (x, v): x == v).count() / test.count()
+
+    # Save and load model
+    model.save(sc, "target/tmp/myNaiveBayesModel")
+    sameModel = NaiveBayesModel.load(sc, "target/tmp/myNaiveBayesModel")
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/IsotonicRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/IsotonicRegressionExample.scala
new file mode 100644
index 000000000000..52ac9ae7dd2d
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/IsotonicRegressionExample.scala
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.regression.{IsotonicRegression, IsotonicRegressionModel}
+// $example off$
+import org.apache.spark.{SparkConf, SparkContext}
+
+object IsotonicRegressionExample {
+
+  def main(args: Array[String]) : Unit = {
+
+    val conf = new SparkConf().setAppName("IsotonicRegressionExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    val data = sc.textFile("data/mllib/sample_isotonic_regression_data.txt")
+
+    // Create label, feature, weight tuples from input data with weight set to default value 1.0.
+    val parsedData = data.map { line =>
+      val parts = line.split(',').map(_.toDouble)
+      (parts(0), parts(1), 1.0)
+    }
+
+    // Split data into training (60%) and test (40%) sets.
+    val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
+    val training = splits(0)
+    val test = splits(1)
+
+    // Create isotonic regression model from training data.
+    // Isotonic parameter defaults to true so it is only shown for demonstration
+    val model = new IsotonicRegression().setIsotonic(true).run(training)
+
+    // Create tuples of predicted and real labels.
+    val predictionAndLabel = test.map { point =>
+      val predictedLabel = model.predict(point._2)
+      (predictedLabel, point._1)
+    }
+
+    // Calculate mean squared error between predicted and real labels.
+    val meanSquaredError = predictionAndLabel.map { case (p, l) => math.pow((p - l), 2) }.mean()
+    println("Mean Squared Error = " + meanSquaredError)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myIsotonicRegressionModel")
+    val sameModel = IsotonicRegressionModel.load(sc, "target/tmp/myIsotonicRegressionModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala
new file mode 100644
index 000000000000..a7a47c2a3556
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/NaiveBayesExample.scala
@@ -0,0 +1,57 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.classification.{NaiveBayes, NaiveBayesModel}
+import org.apache.spark.mllib.linalg.Vectors
+import org.apache.spark.mllib.regression.LabeledPoint
+// $example off$
+import org.apache.spark.{SparkConf, SparkContext}
+
+object NaiveBayesExample {
+
+  def main(args: Array[String]) : Unit = {
+    val conf = new SparkConf().setAppName("NaiveBayesExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    val data = sc.textFile("data/mllib/sample_naive_bayes_data.txt")
+    val parsedData = data.map { line =>
+      val parts = line.split(',')
+      LabeledPoint(parts(0).toDouble, Vectors.dense(parts(1).split(' ').map(_.toDouble)))
+    }
+
+    // Split data into training (60%) and test (40%).
+    val splits = parsedData.randomSplit(Array(0.6, 0.4), seed = 11L)
+    val training = splits(0)
+    val test = splits(1)
+
+    val model = NaiveBayes.train(training, lambda = 1.0, modelType = "multinomial")
+
+    val predictionAndLabel = test.map(p => (model.predict(p.features), p.label))
+    val accuracy = 1.0 * predictionAndLabel.filter(x => x._1 == x._2).count() / test.count()
+
+    // Save and load model
+    model.save(sc, "target/tmp/myNaiveBayesModel")
+    val sameModel = NaiveBayesModel.load(sc, "target/tmp/myNaiveBayesModel")
+    // $example off$
+  }
+}
+
+// scalastyle:on println

From ecfb3e73fd0a99f0be96034710974e78b6f9d624 Mon Sep 17 00:00:00 2001
From: lihao <lihaowhu@gmail.com>
Date: Mon, 2 Nov 2015 16:09:22 -0800
Subject: [PATCH 449/896] [SPARK-10286][ML][PYSPARK][DOCS] Add @since
 annotation to pyspark.ml.param and pyspark.ml.*

Author: lihao <lihaowhu@gmail.com>

Closes #9275 from lidinghao/SPARK-10286.
---
 python/pyspark/ml/evaluation.py     |  20 ++++
 python/pyspark/ml/feature.py        | 164 ++++++++++++++++++++++++++++
 python/pyspark/ml/param/__init__.py |  16 +++
 python/pyspark/ml/pipeline.py       |  30 +++++
 4 files changed, 230 insertions(+)

diff --git a/python/pyspark/ml/evaluation.py b/python/pyspark/ml/evaluation.py
index cb3b07947e48..dcc1738ec518 100644
--- a/python/pyspark/ml/evaluation.py
+++ b/python/pyspark/ml/evaluation.py
@@ -17,6 +17,7 @@
 
 from abc import abstractmethod, ABCMeta
 
+from pyspark import since
 from pyspark.ml.wrapper import JavaWrapper
 from pyspark.ml.param import Param, Params
 from pyspark.ml.param.shared import HasLabelCol, HasPredictionCol, HasRawPredictionCol
@@ -31,6 +32,8 @@
 class Evaluator(Params):
     """
     Base class for evaluators that compute metrics from predictions.
+
+    .. versionadded:: 1.4.0
     """
 
     __metaclass__ = ABCMeta
@@ -46,6 +49,7 @@ def _evaluate(self, dataset):
         """
         raise NotImplementedError()
 
+    @since("1.4.0")
     def evaluate(self, dataset, params=None):
         """
         Evaluates the output with optional parameters.
@@ -66,6 +70,7 @@ def evaluate(self, dataset, params=None):
         else:
             raise ValueError("Params must be a param map but got %s." % type(params))
 
+    @since("1.5.0")
     def isLargerBetter(self):
         """
         Indicates whether the metric returned by :py:meth:`evaluate` should be maximized
@@ -114,6 +119,8 @@ class BinaryClassificationEvaluator(JavaEvaluator, HasLabelCol, HasRawPrediction
     0.70...
     >>> evaluator.evaluate(dataset, {evaluator.metricName: "areaUnderPR"})
     0.83...
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -138,6 +145,7 @@ def __init__(self, rawPredictionCol="rawPrediction", labelCol="label",
         kwargs = self.__init__._input_kwargs
         self._set(**kwargs)
 
+    @since("1.4.0")
     def setMetricName(self, value):
         """
         Sets the value of :py:attr:`metricName`.
@@ -145,6 +153,7 @@ def setMetricName(self, value):
         self._paramMap[self.metricName] = value
         return self
 
+    @since("1.4.0")
     def getMetricName(self):
         """
         Gets the value of metricName or its default value.
@@ -152,6 +161,7 @@ def getMetricName(self):
         return self.getOrDefault(self.metricName)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, rawPredictionCol="rawPrediction", labelCol="label",
                   metricName="areaUnderROC"):
         """
@@ -180,6 +190,8 @@ class RegressionEvaluator(JavaEvaluator, HasLabelCol, HasPredictionCol):
     0.993...
     >>> evaluator.evaluate(dataset, {evaluator.metricName: "mae"})
     2.649...
+
+    .. versionadded:: 1.4.0
     """
     # Because we will maximize evaluation value (ref: `CrossValidator`),
     # when we evaluate a metric that is needed to minimize (e.g., `"rmse"`, `"mse"`, `"mae"`),
@@ -205,6 +217,7 @@ def __init__(self, predictionCol="prediction", labelCol="label",
         kwargs = self.__init__._input_kwargs
         self._set(**kwargs)
 
+    @since("1.4.0")
     def setMetricName(self, value):
         """
         Sets the value of :py:attr:`metricName`.
@@ -212,6 +225,7 @@ def setMetricName(self, value):
         self._paramMap[self.metricName] = value
         return self
 
+    @since("1.4.0")
     def getMetricName(self):
         """
         Gets the value of metricName or its default value.
@@ -219,6 +233,7 @@ def getMetricName(self):
         return self.getOrDefault(self.metricName)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, predictionCol="prediction", labelCol="label",
                   metricName="rmse"):
         """
@@ -246,6 +261,8 @@ class MulticlassClassificationEvaluator(JavaEvaluator, HasLabelCol, HasPredictio
     0.66...
     >>> evaluator.evaluate(dataset, {evaluator.metricName: "recall"})
     0.66...
+
+    .. versionadded:: 1.5.0
     """
     # a placeholder to make it appear in the generated doc
     metricName = Param(Params._dummy(), "metricName",
@@ -271,6 +288,7 @@ def __init__(self, predictionCol="prediction", labelCol="label",
         kwargs = self.__init__._input_kwargs
         self._set(**kwargs)
 
+    @since("1.5.0")
     def setMetricName(self, value):
         """
         Sets the value of :py:attr:`metricName`.
@@ -278,6 +296,7 @@ def setMetricName(self, value):
         self._paramMap[self.metricName] = value
         return self
 
+    @since("1.5.0")
     def getMetricName(self):
         """
         Gets the value of metricName or its default value.
@@ -285,6 +304,7 @@ def getMetricName(self):
         return self.getOrDefault(self.metricName)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, predictionCol="prediction", labelCol="label",
                   metricName="f1"):
         """
diff --git a/python/pyspark/ml/feature.py b/python/pyspark/ml/feature.py
index 55bde6d0ea4f..c7b6dd926c3e 100644
--- a/python/pyspark/ml/feature.py
+++ b/python/pyspark/ml/feature.py
@@ -19,6 +19,7 @@
 if sys.version > '3':
     basestring = str
 
+from pyspark import since
 from pyspark.rdd import ignore_unicode_prefix
 from pyspark.ml.param.shared import *
 from pyspark.ml.util import keyword_only
@@ -51,6 +52,8 @@ class Binarizer(JavaTransformer, HasInputCol, HasOutputCol):
     >>> params = {binarizer.threshold: -0.5, binarizer.outputCol: "vector"}
     >>> binarizer.transform(df, params).head().vector
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -71,6 +74,7 @@ def __init__(self, threshold=0.0, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, threshold=0.0, inputCol=None, outputCol=None):
         """
         setParams(self, threshold=0.0, inputCol=None, outputCol=None)
@@ -79,6 +83,7 @@ def setParams(self, threshold=0.0, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setThreshold(self, value):
         """
         Sets the value of :py:attr:`threshold`.
@@ -86,6 +91,7 @@ def setThreshold(self, value):
         self._paramMap[self.threshold] = value
         return self
 
+    @since("1.4.0")
     def getThreshold(self):
         """
         Gets the value of threshold or its default value.
@@ -114,6 +120,8 @@ class Bucketizer(JavaTransformer, HasInputCol, HasOutputCol):
     2.0
     >>> bucketizer.setParams(outputCol="b").transform(df).head().b
     0.0
+
+    .. versionadded:: 1.3.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -150,6 +158,7 @@ def __init__(self, splits=None, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, splits=None, inputCol=None, outputCol=None):
         """
         setParams(self, splits=None, inputCol=None, outputCol=None)
@@ -158,6 +167,7 @@ def setParams(self, splits=None, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setSplits(self, value):
         """
         Sets the value of :py:attr:`splits`.
@@ -165,6 +175,7 @@ def setSplits(self, value):
         self._paramMap[self.splits] = value
         return self
 
+    @since("1.4.0")
     def getSplits(self):
         """
         Gets the value of threshold or its default value.
@@ -194,6 +205,8 @@ class CountVectorizer(JavaEstimator, HasInputCol, HasOutputCol):
     ...
     >>> sorted(map(str, model.vocabulary))
     ['a', 'b', 'c']
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -242,6 +255,7 @@ def __init__(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outpu
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None):
         """
         setParams(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outputCol=None)
@@ -250,6 +264,7 @@ def setParams(self, minTF=1.0, minDF=1.0, vocabSize=1 << 18, inputCol=None, outp
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setMinTF(self, value):
         """
         Sets the value of :py:attr:`minTF`.
@@ -257,12 +272,14 @@ def setMinTF(self, value):
         self._paramMap[self.minTF] = value
         return self
 
+    @since("1.6.0")
     def getMinTF(self):
         """
         Gets the value of minTF or its default value.
         """
         return self.getOrDefault(self.minTF)
 
+    @since("1.6.0")
     def setMinDF(self, value):
         """
         Sets the value of :py:attr:`minDF`.
@@ -270,12 +287,14 @@ def setMinDF(self, value):
         self._paramMap[self.minDF] = value
         return self
 
+    @since("1.6.0")
     def getMinDF(self):
         """
         Gets the value of minDF or its default value.
         """
         return self.getOrDefault(self.minDF)
 
+    @since("1.6.0")
     def setVocabSize(self, value):
         """
         Sets the value of :py:attr:`vocabSize`.
@@ -283,6 +302,7 @@ def setVocabSize(self, value):
         self._paramMap[self.vocabSize] = value
         return self
 
+    @since("1.6.0")
     def getVocabSize(self):
         """
         Gets the value of vocabSize or its default value.
@@ -298,9 +318,12 @@ class CountVectorizerModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by CountVectorizer.
+
+    .. versionadded:: 1.6.0
     """
 
     @property
+    @since("1.6.0")
     def vocabulary(self):
         """
         An array of terms in the vocabulary.
@@ -331,6 +354,8 @@ class DCT(JavaTransformer, HasInputCol, HasOutputCol):
     >>> df3 = DCT(inverse=True, inputCol="resultVec", outputCol="origVec").transform(df2)
     >>> df3.head().origVec
     DenseVector([5.0, 8.0, 6.0])
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -351,6 +376,7 @@ def __init__(self, inverse=False, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, inverse=False, inputCol=None, outputCol=None):
         """
         setParams(self, inverse=False, inputCol=None, outputCol=None)
@@ -359,6 +385,7 @@ def setParams(self, inverse=False, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setInverse(self, value):
         """
         Sets the value of :py:attr:`inverse`.
@@ -366,6 +393,7 @@ def setInverse(self, value):
         self._paramMap[self.inverse] = value
         return self
 
+    @since("1.6.0")
     def getInverse(self):
         """
         Gets the value of inverse or its default value.
@@ -390,6 +418,8 @@ class ElementwiseProduct(JavaTransformer, HasInputCol, HasOutputCol):
     DenseVector([2.0, 2.0, 9.0])
     >>> ep.setParams(scalingVec=Vectors.dense([2.0, 3.0, 5.0])).transform(df).head().eprod
     DenseVector([4.0, 3.0, 15.0])
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -410,6 +440,7 @@ def __init__(self, scalingVec=None, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, scalingVec=None, inputCol=None, outputCol=None):
         """
         setParams(self, scalingVec=None, inputCol=None, outputCol=None)
@@ -418,6 +449,7 @@ def setParams(self, scalingVec=None, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.5.0")
     def setScalingVec(self, value):
         """
         Sets the value of :py:attr:`scalingVec`.
@@ -425,6 +457,7 @@ def setScalingVec(self, value):
         self._paramMap[self.scalingVec] = value
         return self
 
+    @since("1.5.0")
     def getScalingVec(self):
         """
         Gets the value of scalingVec or its default value.
@@ -449,6 +482,8 @@ class HashingTF(JavaTransformer, HasInputCol, HasOutputCol, HasNumFeatures):
     >>> params = {hashingTF.numFeatures: 5, hashingTF.outputCol: "vector"}
     >>> hashingTF.transform(df, params).head().vector
     SparseVector(5, {2: 1.0, 3: 1.0, 4: 1.0})
+
+    .. versionadded:: 1.3.0
     """
 
     @keyword_only
@@ -463,6 +498,7 @@ def __init__(self, numFeatures=1 << 18, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.3.0")
     def setParams(self, numFeatures=1 << 18, inputCol=None, outputCol=None):
         """
         setParams(self, numFeatures=1 << 18, inputCol=None, outputCol=None)
@@ -490,6 +526,8 @@ class IDF(JavaEstimator, HasInputCol, HasOutputCol):
     >>> params = {idf.minDocFreq: 1, idf.outputCol: "vector"}
     >>> idf.fit(df, params).transform(df).head().vector
     DenseVector([0.2877, 0.0])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -510,6 +548,7 @@ def __init__(self, minDocFreq=0, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, minDocFreq=0, inputCol=None, outputCol=None):
         """
         setParams(self, minDocFreq=0, inputCol=None, outputCol=None)
@@ -518,6 +557,7 @@ def setParams(self, minDocFreq=0, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setMinDocFreq(self, value):
         """
         Sets the value of :py:attr:`minDocFreq`.
@@ -525,6 +565,7 @@ def setMinDocFreq(self, value):
         self._paramMap[self.minDocFreq] = value
         return self
 
+    @since("1.4.0")
     def getMinDocFreq(self):
         """
         Gets the value of minDocFreq or its default value.
@@ -540,6 +581,8 @@ class IDFModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by IDF.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -571,6 +614,8 @@ class MinMaxScaler(JavaEstimator, HasInputCol, HasOutputCol):
     |[2.0]| [1.0]|
     +-----+------+
     ...
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -591,6 +636,7 @@ def __init__(self, min=0.0, max=1.0, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, min=0.0, max=1.0, inputCol=None, outputCol=None):
         """
         setParams(self, min=0.0, max=1.0, inputCol=None, outputCol=None)
@@ -599,6 +645,7 @@ def setParams(self, min=0.0, max=1.0, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setMin(self, value):
         """
         Sets the value of :py:attr:`min`.
@@ -606,12 +653,14 @@ def setMin(self, value):
         self._paramMap[self.min] = value
         return self
 
+    @since("1.6.0")
     def getMin(self):
         """
         Gets the value of min or its default value.
         """
         return self.getOrDefault(self.min)
 
+    @since("1.6.0")
     def setMax(self, value):
         """
         Sets the value of :py:attr:`max`.
@@ -619,6 +668,7 @@ def setMax(self, value):
         self._paramMap[self.max] = value
         return self
 
+    @since("1.6.0")
     def getMax(self):
         """
         Gets the value of max or its default value.
@@ -634,6 +684,8 @@ class MinMaxScalerModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by :py:class:`MinMaxScaler`.
+
+    .. versionadded:: 1.6.0
     """
 
 
@@ -668,6 +720,8 @@ class NGram(JavaTransformer, HasInputCol, HasOutputCol):
     Traceback (most recent call last):
         ...
     TypeError: Method setParams forces keyword arguments.
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -686,6 +740,7 @@ def __init__(self, n=2, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, n=2, inputCol=None, outputCol=None):
         """
         setParams(self, n=2, inputCol=None, outputCol=None)
@@ -694,6 +749,7 @@ def setParams(self, n=2, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.5.0")
     def setN(self, value):
         """
         Sets the value of :py:attr:`n`.
@@ -701,6 +757,7 @@ def setN(self, value):
         self._paramMap[self.n] = value
         return self
 
+    @since("1.5.0")
     def getN(self):
         """
         Gets the value of n or its default value.
@@ -726,6 +783,8 @@ class Normalizer(JavaTransformer, HasInputCol, HasOutputCol):
     >>> params = {normalizer.p: 1.0, normalizer.inputCol: "dense", normalizer.outputCol: "vector"}
     >>> normalizer.transform(df, params).head().vector
     DenseVector([0.4286, -0.5714])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -744,6 +803,7 @@ def __init__(self, p=2.0, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, p=2.0, inputCol=None, outputCol=None):
         """
         setParams(self, p=2.0, inputCol=None, outputCol=None)
@@ -752,6 +812,7 @@ def setParams(self, p=2.0, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setP(self, value):
         """
         Sets the value of :py:attr:`p`.
@@ -759,6 +820,7 @@ def setP(self, value):
         self._paramMap[self.p] = value
         return self
 
+    @since("1.4.0")
     def getP(self):
         """
         Gets the value of p or its default value.
@@ -800,6 +862,8 @@ class OneHotEncoder(JavaTransformer, HasInputCol, HasOutputCol):
     >>> params = {encoder.dropLast: False, encoder.outputCol: "test"}
     >>> encoder.transform(td, params).head().test
     SparseVector(3, {0: 1.0})
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -818,6 +882,7 @@ def __init__(self, dropLast=True, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, dropLast=True, inputCol=None, outputCol=None):
         """
         setParams(self, dropLast=True, inputCol=None, outputCol=None)
@@ -826,6 +891,7 @@ def setParams(self, dropLast=True, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setDropLast(self, value):
         """
         Sets the value of :py:attr:`dropLast`.
@@ -833,6 +899,7 @@ def setDropLast(self, value):
         self._paramMap[self.dropLast] = value
         return self
 
+    @since("1.4.0")
     def getDropLast(self):
         """
         Gets the value of dropLast or its default value.
@@ -858,6 +925,8 @@ class PolynomialExpansion(JavaTransformer, HasInputCol, HasOutputCol):
     DenseVector([0.5, 0.25, 2.0, 1.0, 4.0])
     >>> px.setParams(outputCol="test").transform(df).head().test
     DenseVector([0.5, 0.25, 2.0, 1.0, 4.0])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -877,6 +946,7 @@ def __init__(self, degree=2, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, degree=2, inputCol=None, outputCol=None):
         """
         setParams(self, degree=2, inputCol=None, outputCol=None)
@@ -885,6 +955,7 @@ def setParams(self, degree=2, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setDegree(self, value):
         """
         Sets the value of :py:attr:`degree`.
@@ -892,6 +963,7 @@ def setDegree(self, value):
         self._paramMap[self.degree] = value
         return self
 
+    @since("1.4.0")
     def getDegree(self):
         """
         Gets the value of degree or its default value.
@@ -929,6 +1001,8 @@ class RegexTokenizer(JavaTransformer, HasInputCol, HasOutputCol):
     Traceback (most recent call last):
         ...
     TypeError: Method setParams forces keyword arguments.
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -951,6 +1025,7 @@ def __init__(self, minTokenLength=1, gaps=True, pattern="\\s+", inputCol=None, o
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, minTokenLength=1, gaps=True, pattern="\\s+", inputCol=None, outputCol=None):
         """
         setParams(self, minTokenLength=1, gaps=True, pattern="\\s+", inputCol=None, outputCol=None)
@@ -959,6 +1034,7 @@ def setParams(self, minTokenLength=1, gaps=True, pattern="\\s+", inputCol=None,
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setMinTokenLength(self, value):
         """
         Sets the value of :py:attr:`minTokenLength`.
@@ -966,12 +1042,14 @@ def setMinTokenLength(self, value):
         self._paramMap[self.minTokenLength] = value
         return self
 
+    @since("1.4.0")
     def getMinTokenLength(self):
         """
         Gets the value of minTokenLength or its default value.
         """
         return self.getOrDefault(self.minTokenLength)
 
+    @since("1.4.0")
     def setGaps(self, value):
         """
         Sets the value of :py:attr:`gaps`.
@@ -979,12 +1057,14 @@ def setGaps(self, value):
         self._paramMap[self.gaps] = value
         return self
 
+    @since("1.4.0")
     def getGaps(self):
         """
         Gets the value of gaps or its default value.
         """
         return self.getOrDefault(self.gaps)
 
+    @since("1.4.0")
     def setPattern(self, value):
         """
         Sets the value of :py:attr:`pattern`.
@@ -992,6 +1072,7 @@ def setPattern(self, value):
         self._paramMap[self.pattern] = value
         return self
 
+    @since("1.4.0")
     def getPattern(self):
         """
         Gets the value of pattern or its default value.
@@ -1013,6 +1094,8 @@ class SQLTransformer(JavaTransformer):
     ...     statement="SELECT *, (v1 + v2) AS v3, (v1 * v2) AS v4 FROM __THIS__")
     >>> sqlTrans.transform(df).head()
     Row(id=0, v1=1.0, v2=3.0, v3=4.0, v4=3.0)
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1030,6 +1113,7 @@ def __init__(self, statement=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, statement=None):
         """
         setParams(self, statement=None)
@@ -1038,6 +1122,7 @@ def setParams(self, statement=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setStatement(self, value):
         """
         Sets the value of :py:attr:`statement`.
@@ -1045,6 +1130,7 @@ def setStatement(self, value):
         self._paramMap[self.statement] = value
         return self
 
+    @since("1.6.0")
     def getStatement(self):
         """
         Gets the value of statement or its default value.
@@ -1070,6 +1156,8 @@ class StandardScaler(JavaEstimator, HasInputCol, HasOutputCol):
     DenseVector([1.4142])
     >>> model.transform(df).collect()[1].scaled
     DenseVector([1.4142])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1090,6 +1178,7 @@ def __init__(self, withMean=False, withStd=True, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, withMean=False, withStd=True, inputCol=None, outputCol=None):
         """
         setParams(self, withMean=False, withStd=True, inputCol=None, outputCol=None)
@@ -1098,6 +1187,7 @@ def setParams(self, withMean=False, withStd=True, inputCol=None, outputCol=None)
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setWithMean(self, value):
         """
         Sets the value of :py:attr:`withMean`.
@@ -1105,12 +1195,14 @@ def setWithMean(self, value):
         self._paramMap[self.withMean] = value
         return self
 
+    @since("1.4.0")
     def getWithMean(self):
         """
         Gets the value of withMean or its default value.
         """
         return self.getOrDefault(self.withMean)
 
+    @since("1.4.0")
     def setWithStd(self, value):
         """
         Sets the value of :py:attr:`withStd`.
@@ -1118,6 +1210,7 @@ def setWithStd(self, value):
         self._paramMap[self.withStd] = value
         return self
 
+    @since("1.4.0")
     def getWithStd(self):
         """
         Gets the value of withStd or its default value.
@@ -1133,9 +1226,12 @@ class StandardScalerModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by StandardScaler.
+
+    .. versionadded:: 1.4.0
     """
 
     @property
+    @since("1.5.0")
     def std(self):
         """
         Standard deviation of the StandardScalerModel.
@@ -1143,6 +1239,7 @@ def std(self):
         return self._call_java("std")
 
     @property
+    @since("1.5.0")
     def mean(self):
         """
         Mean of the StandardScalerModel.
@@ -1171,6 +1268,8 @@ class StringIndexer(JavaEstimator, HasInputCol, HasOutputCol, HasHandleInvalid):
     >>> sorted(set([(i[0], str(i[1])) for i in itd.select(itd.id, itd.label2).collect()]),
     ...     key=lambda x: x[0])
     [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'a'), (4, 'a'), (5, 'c')]
+
+    .. versionadded:: 1.4.0
     """
 
     @keyword_only
@@ -1185,6 +1284,7 @@ def __init__(self, inputCol=None, outputCol=None, handleInvalid="error"):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, inputCol=None, outputCol=None, handleInvalid="error"):
         """
         setParams(self, inputCol=None, outputCol=None, handleInvalid="error")
@@ -1202,8 +1302,11 @@ class StringIndexerModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by StringIndexer.
+
+    .. versionadded:: 1.4.0
     """
     @property
+    @since("1.5.0")
     def labels(self):
         """
         Ordered list of labels, corresponding to indices to be assigned.
@@ -1221,6 +1324,8 @@ class IndexToString(JavaTransformer, HasInputCol, HasOutputCol):
     The index-string mapping is either from the ML attributes of the input column,
     or from user-supplied labels (which take precedence over ML attributes).
     See L{StringIndexer} for converting strings into indices.
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make the labels show up in generated doc
@@ -1243,6 +1348,7 @@ def __init__(self, inputCol=None, outputCol=None, labels=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, inputCol=None, outputCol=None, labels=None):
         """
         setParams(self, inputCol=None, outputCol=None, labels=None)
@@ -1251,6 +1357,7 @@ def setParams(self, inputCol=None, outputCol=None, labels=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setLabels(self, value):
         """
         Sets the value of :py:attr:`labels`.
@@ -1258,6 +1365,7 @@ def setLabels(self, value):
         self._paramMap[self.labels] = value
         return self
 
+    @since("1.6.0")
     def getLabels(self):
         """
         Gets the value of :py:attr:`labels` or its default value.
@@ -1271,6 +1379,8 @@ class StopWordsRemover(JavaTransformer, HasInputCol, HasOutputCol):
 
     A feature transformer that filters out stop words from input.
     Note: null values from input array are preserved unless adding null to stopWords explicitly.
+
+    .. versionadded:: 1.6.0
     """
     # a placeholder to make the stopwords show up in generated doc
     stopWords = Param(Params._dummy(), "stopWords", "The words to be filtered out")
@@ -1297,6 +1407,7 @@ def __init__(self, inputCol=None, outputCol=None, stopWords=None,
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, inputCol=None, outputCol=None, stopWords=None,
                   caseSensitive=False):
         """
@@ -1307,6 +1418,7 @@ def setParams(self, inputCol=None, outputCol=None, stopWords=None,
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setStopWords(self, value):
         """
         Specify the stopwords to be filtered.
@@ -1314,12 +1426,14 @@ def setStopWords(self, value):
         self._paramMap[self.stopWords] = value
         return self
 
+    @since("1.6.0")
     def getStopWords(self):
         """
         Get the stopwords.
         """
         return self.getOrDefault(self.stopWords)
 
+    @since("1.6.0")
     def setCaseSensitive(self, value):
         """
         Set whether to do a case sensitive comparison over the stop words
@@ -1327,6 +1441,7 @@ def setCaseSensitive(self, value):
         self._paramMap[self.caseSensitive] = value
         return self
 
+    @since("1.6.0")
     def getCaseSensitive(self):
         """
         Get whether to do a case sensitive comparison over the stop words.
@@ -1360,6 +1475,8 @@ class Tokenizer(JavaTransformer, HasInputCol, HasOutputCol):
     Traceback (most recent call last):
         ...
     TypeError: Method setParams forces keyword arguments.
+
+    .. versionadded:: 1.3.0
     """
 
     @keyword_only
@@ -1373,6 +1490,7 @@ def __init__(self, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.3.0")
     def setParams(self, inputCol=None, outputCol=None):
         """
         setParams(self, inputCol="input", outputCol="output")
@@ -1398,6 +1516,8 @@ class VectorAssembler(JavaTransformer, HasInputCols, HasOutputCol):
     >>> params = {vecAssembler.inputCols: ["b", "a"], vecAssembler.outputCol: "vector"}
     >>> vecAssembler.transform(df, params).head().vector
     DenseVector([0.0, 1.0])
+
+    .. versionadded:: 1.4.0
     """
 
     @keyword_only
@@ -1411,6 +1531,7 @@ def __init__(self, inputCols=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, inputCols=None, outputCol=None):
         """
         setParams(self, inputCols=None, outputCol=None)
@@ -1477,6 +1598,8 @@ class VectorIndexer(JavaEstimator, HasInputCol, HasOutputCol):
     >>> model2 = indexer.fit(df, params)
     >>> model2.transform(df).head().vector
     DenseVector([1.0, 0.0])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1501,6 +1624,7 @@ def __init__(self, maxCategories=20, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, maxCategories=20, inputCol=None, outputCol=None):
         """
         setParams(self, maxCategories=20, inputCol=None, outputCol=None)
@@ -1509,6 +1633,7 @@ def setParams(self, maxCategories=20, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setMaxCategories(self, value):
         """
         Sets the value of :py:attr:`maxCategories`.
@@ -1516,6 +1641,7 @@ def setMaxCategories(self, value):
         self._paramMap[self.maxCategories] = value
         return self
 
+    @since("1.4.0")
     def getMaxCategories(self):
         """
         Gets the value of maxCategories or its default value.
@@ -1531,9 +1657,12 @@ class VectorIndexerModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by VectorIndexer.
+
+    .. versionadded:: 1.4.0
     """
 
     @property
+    @since("1.4.0")
     def numFeatures(self):
         """
         Number of features, i.e., length of Vectors which this transforms.
@@ -1541,6 +1670,7 @@ def numFeatures(self):
         return self._call_java("numFeatures")
 
     @property
+    @since("1.4.0")
     def categoryMaps(self):
         """
         Feature value index.  Keys are categorical feature indices (column indices).
@@ -1573,6 +1703,8 @@ class VectorSlicer(JavaTransformer, HasInputCol, HasOutputCol):
     >>> vs = VectorSlicer(inputCol="features", outputCol="sliced", indices=[1, 4])
     >>> vs.transform(df).head().sliced
     DenseVector([2.3, 1.0])
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1600,6 +1732,7 @@ def __init__(self, inputCol=None, outputCol=None, indices=None, names=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, inputCol=None, outputCol=None, indices=None, names=None):
         """
         setParams(self, inputCol=None, outputCol=None, indices=None, names=None):
@@ -1608,6 +1741,7 @@ def setParams(self, inputCol=None, outputCol=None, indices=None, names=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.6.0")
     def setIndices(self, value):
         """
         Sets the value of :py:attr:`indices`.
@@ -1615,12 +1749,14 @@ def setIndices(self, value):
         self._paramMap[self.indices] = value
         return self
 
+    @since("1.6.0")
     def getIndices(self):
         """
         Gets the value of indices or its default value.
         """
         return self.getOrDefault(self.indices)
 
+    @since("1.6.0")
     def setNames(self, value):
         """
         Sets the value of :py:attr:`names`.
@@ -1628,6 +1764,7 @@ def setNames(self, value):
         self._paramMap[self.names] = value
         return self
 
+    @since("1.6.0")
     def getNames(self):
         """
         Gets the value of names or its default value.
@@ -1666,6 +1803,8 @@ class Word2Vec(JavaEstimator, HasStepSize, HasMaxIter, HasSeed, HasInputCol, Has
     ...
     >>> model.transform(doc).head().model
     DenseVector([-0.0422, -0.5138, -0.2546, 0.6885, 0.276])
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1699,6 +1838,7 @@ def __init__(self, vectorSize=100, minCount=5, numPartitions=1, stepSize=0.025,
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, vectorSize=100, minCount=5, numPartitions=1, stepSize=0.025, maxIter=1,
                   seed=None, inputCol=None, outputCol=None):
         """
@@ -1709,6 +1849,7 @@ def setParams(self, vectorSize=100, minCount=5, numPartitions=1, stepSize=0.025,
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.4.0")
     def setVectorSize(self, value):
         """
         Sets the value of :py:attr:`vectorSize`.
@@ -1716,12 +1857,14 @@ def setVectorSize(self, value):
         self._paramMap[self.vectorSize] = value
         return self
 
+    @since("1.4.0")
     def getVectorSize(self):
         """
         Gets the value of vectorSize or its default value.
         """
         return self.getOrDefault(self.vectorSize)
 
+    @since("1.4.0")
     def setNumPartitions(self, value):
         """
         Sets the value of :py:attr:`numPartitions`.
@@ -1729,12 +1872,14 @@ def setNumPartitions(self, value):
         self._paramMap[self.numPartitions] = value
         return self
 
+    @since("1.4.0")
     def getNumPartitions(self):
         """
         Gets the value of numPartitions or its default value.
         """
         return self.getOrDefault(self.numPartitions)
 
+    @since("1.4.0")
     def setMinCount(self, value):
         """
         Sets the value of :py:attr:`minCount`.
@@ -1742,6 +1887,7 @@ def setMinCount(self, value):
         self._paramMap[self.minCount] = value
         return self
 
+    @since("1.4.0")
     def getMinCount(self):
         """
         Gets the value of minCount or its default value.
@@ -1757,8 +1903,11 @@ class Word2VecModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by Word2Vec.
+
+    .. versionadded:: 1.4.0
     """
 
+    @since("1.5.0")
     def getVectors(self):
         """
         Returns the vector representation of the words as a dataframe
@@ -1766,6 +1915,7 @@ def getVectors(self):
         """
         return self._call_java("getVectors")
 
+    @since("1.5.0")
     def findSynonyms(self, word, num):
         """
         Find "num" number of words closest in similarity to "word".
@@ -1794,6 +1944,8 @@ class PCA(JavaEstimator, HasInputCol, HasOutputCol):
     >>> model = pca.fit(df)
     >>> model.transform(df).collect()[0].pca_features
     DenseVector([1.648..., -4.013...])
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1811,6 +1963,7 @@ def __init__(self, k=None, inputCol=None, outputCol=None):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, k=None, inputCol=None, outputCol=None):
         """
         setParams(self, k=None, inputCol=None, outputCol=None)
@@ -1819,6 +1972,7 @@ def setParams(self, k=None, inputCol=None, outputCol=None):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.5.0")
     def setK(self, value):
         """
         Sets the value of :py:attr:`k`.
@@ -1826,6 +1980,7 @@ def setK(self, value):
         self._paramMap[self.k] = value
         return self
 
+    @since("1.5.0")
     def getK(self):
         """
         Gets the value of k or its default value.
@@ -1841,6 +1996,8 @@ class PCAModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by PCA.
+
+    .. versionadded:: 1.5.0
     """
 
 
@@ -1879,6 +2036,8 @@ class RFormula(JavaEstimator, HasFeaturesCol, HasLabelCol):
     |0.0|0.0|  a|   [0.0]|  0.0|
     +---+---+---+--------+-----+
     ...
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -1896,6 +2055,7 @@ def __init__(self, formula=None, featuresCol="features", labelCol="label"):
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, formula=None, featuresCol="features", labelCol="label"):
         """
         setParams(self, formula=None, featuresCol="features", labelCol="label")
@@ -1904,6 +2064,7 @@ def setParams(self, formula=None, featuresCol="features", labelCol="label"):
         kwargs = self.setParams._input_kwargs
         return self._set(**kwargs)
 
+    @since("1.5.0")
     def setFormula(self, value):
         """
         Sets the value of :py:attr:`formula`.
@@ -1911,6 +2072,7 @@ def setFormula(self, value):
         self._paramMap[self.formula] = value
         return self
 
+    @since("1.5.0")
     def getFormula(self):
         """
         Gets the value of :py:attr:`formula`.
@@ -1926,6 +2088,8 @@ class RFormulaModel(JavaModel):
     .. note:: Experimental
 
     Model fitted by :py:class:`RFormula`.
+
+    .. versionadded:: 1.5.0
     """
 
 
diff --git a/python/pyspark/ml/param/__init__.py b/python/pyspark/ml/param/__init__.py
index 2e0c63cb47b1..35c9b776a3d5 100644
--- a/python/pyspark/ml/param/__init__.py
+++ b/python/pyspark/ml/param/__init__.py
@@ -18,6 +18,7 @@
 from abc import ABCMeta
 import copy
 
+from pyspark import since
 from pyspark.ml.util import Identifiable
 
 
@@ -27,6 +28,8 @@
 class Param(object):
     """
     A param with self-contained documentation.
+
+    .. versionadded:: 1.3.0
     """
 
     def __init__(self, parent, name, doc):
@@ -56,6 +59,8 @@ class Params(Identifiable):
     """
     Components that take parameters. This also provides an internal
     param map to store parameter values attached to the instance.
+
+    .. versionadded:: 1.3.0
     """
 
     __metaclass__ = ABCMeta
@@ -72,6 +77,7 @@ def __init__(self):
         self._params = None
 
     @property
+    @since("1.3.0")
     def params(self):
         """
         Returns all params ordered by name. The default implementation
@@ -83,6 +89,7 @@ def params(self):
                                        [getattr(self, x) for x in dir(self) if x != "params"]))
         return self._params
 
+    @since("1.4.0")
     def explainParam(self, param):
         """
         Explains a single param and returns its name, doc, and optional
@@ -100,6 +107,7 @@ def explainParam(self, param):
         valueStr = "(" + ", ".join(values) + ")"
         return "%s: %s %s" % (param.name, param.doc, valueStr)
 
+    @since("1.4.0")
     def explainParams(self):
         """
         Returns the documentation of all params with their optionally
@@ -107,6 +115,7 @@ def explainParams(self):
         """
         return "\n".join([self.explainParam(param) for param in self.params])
 
+    @since("1.4.0")
     def getParam(self, paramName):
         """
         Gets a param by its name.
@@ -117,6 +126,7 @@ def getParam(self, paramName):
         else:
             raise ValueError("Cannot find param with name %s." % paramName)
 
+    @since("1.4.0")
     def isSet(self, param):
         """
         Checks whether a param is explicitly set by user.
@@ -124,6 +134,7 @@ def isSet(self, param):
         param = self._resolveParam(param)
         return param in self._paramMap
 
+    @since("1.4.0")
     def hasDefault(self, param):
         """
         Checks whether a param has a default value.
@@ -131,6 +142,7 @@ def hasDefault(self, param):
         param = self._resolveParam(param)
         return param in self._defaultParamMap
 
+    @since("1.4.0")
     def isDefined(self, param):
         """
         Checks whether a param is explicitly set by user or has
@@ -138,6 +150,7 @@ def isDefined(self, param):
         """
         return self.isSet(param) or self.hasDefault(param)
 
+    @since("1.4.0")
     def hasParam(self, paramName):
         """
         Tests whether this instance contains a param with a given
@@ -146,6 +159,7 @@ def hasParam(self, paramName):
         param = self._resolveParam(paramName)
         return param in self.params
 
+    @since("1.4.0")
     def getOrDefault(self, param):
         """
         Gets the value of a param in the user-supplied param map or its
@@ -157,6 +171,7 @@ def getOrDefault(self, param):
         else:
             return self._defaultParamMap[param]
 
+    @since("1.4.0")
     def extractParamMap(self, extra=None):
         """
         Extracts the embedded default param values and user-supplied
@@ -175,6 +190,7 @@ def extractParamMap(self, extra=None):
         paramMap.update(extra)
         return paramMap
 
+    @since("1.4.0")
     def copy(self, extra=None):
         """
         Creates a copy of this instance with the same uid and some
diff --git a/python/pyspark/ml/pipeline.py b/python/pyspark/ml/pipeline.py
index 312a8502b3a2..4475451edb78 100644
--- a/python/pyspark/ml/pipeline.py
+++ b/python/pyspark/ml/pipeline.py
@@ -17,6 +17,7 @@
 
 from abc import ABCMeta, abstractmethod
 
+from pyspark import since
 from pyspark.ml.param import Param, Params
 from pyspark.ml.util import keyword_only
 from pyspark.mllib.common import inherit_doc
@@ -26,6 +27,8 @@
 class Estimator(Params):
     """
     Abstract class for estimators that fit models to data.
+
+    .. versionadded:: 1.3.0
     """
 
     __metaclass__ = ABCMeta
@@ -42,6 +45,7 @@ def _fit(self, dataset):
         """
         raise NotImplementedError()
 
+    @since("1.3.0")
     def fit(self, dataset, params=None):
         """
         Fits a model to the input dataset with optional parameters.
@@ -73,6 +77,8 @@ class Transformer(Params):
     """
     Abstract class for transformers that transform one dataset into
     another.
+
+    .. versionadded:: 1.3.0
     """
 
     __metaclass__ = ABCMeta
@@ -88,6 +94,7 @@ def _transform(self, dataset):
         """
         raise NotImplementedError()
 
+    @since("1.3.0")
     def transform(self, dataset, params=None):
         """
         Transforms the input dataset with optional parameters.
@@ -113,6 +120,8 @@ def transform(self, dataset, params=None):
 class Model(Transformer):
     """
     Abstract class for models that are fitted by estimators.
+
+    .. versionadded:: 1.4.0
     """
 
     __metaclass__ = ABCMeta
@@ -136,6 +145,8 @@ class Pipeline(Estimator):
     consists of fitted models and transformers, corresponding to the
     pipeline stages. If there are no stages, the pipeline acts as an
     identity transformer.
+
+    .. versionadded:: 1.3.0
     """
 
     @keyword_only
@@ -151,6 +162,7 @@ def __init__(self, stages=None):
         kwargs = self.__init__._input_kwargs
         self.setParams(**kwargs)
 
+    @since("1.3.0")
     def setStages(self, value):
         """
         Set pipeline stages.
@@ -161,6 +173,7 @@ def setStages(self, value):
         self._paramMap[self.stages] = value
         return self
 
+    @since("1.3.0")
     def getStages(self):
         """
         Get pipeline stages.
@@ -169,6 +182,7 @@ def getStages(self):
             return self._paramMap[self.stages]
 
     @keyword_only
+    @since("1.3.0")
     def setParams(self, stages=None):
         """
         setParams(self, stages=None)
@@ -204,7 +218,14 @@ def _fit(self, dataset):
                 transformers.append(stage)
         return PipelineModel(transformers)
 
+    @since("1.4.0")
     def copy(self, extra=None):
+        """
+        Creates a copy of this instance.
+
+        :param extra: extra parameters
+        :returns: new instance
+        """
         if extra is None:
             extra = dict()
         that = Params.copy(self, extra)
@@ -216,6 +237,8 @@ def copy(self, extra=None):
 class PipelineModel(Model):
     """
     Represents a compiled pipeline with transformers and fitted models.
+
+    .. versionadded:: 1.3.0
     """
 
     def __init__(self, stages):
@@ -227,7 +250,14 @@ def _transform(self, dataset):
             dataset = t.transform(dataset)
         return dataset
 
+    @since("1.4.0")
     def copy(self, extra=None):
+        """
+        Creates a copy of this instance.
+
+        :param extra: extra parameters
+        :returns: new instance
+        """
         if extra is None:
             extra = dict()
         stages = [stage.copy(extra) for stage in self.stages]

From ec03866a7ef2d0826520755d47c8c9480148a76c Mon Sep 17 00:00:00 2001
From: Dominik Dahlem <dominik.dahlem@gmail.combination>
Date: Mon, 2 Nov 2015 16:11:42 -0800
Subject: [PATCH 450/896] [SPARK-11343][ML] Allow float and double
 prediction/label columns in RegressionEvaluator

mengxr, felixcheung

This pull request just relaxes the type of the prediction/label columns to be float and double. Internally, these columns are casted to double. The other evaluators might need to be changed also.

Author: Dominik Dahlem <dominik.dahlem@gmail.combination>

Closes #9296 from dahlem/ddahlem_regression_evaluator_double_predictions_27102015.
---
 .../spark/ml/evaluation/RegressionEvaluator.scala    | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
index 3fd34d857101..ba012f444d3e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
@@ -23,7 +23,8 @@ import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
 import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
 import org.apache.spark.mllib.evaluation.RegressionMetrics
 import org.apache.spark.sql.{DataFrame, Row}
-import org.apache.spark.sql.types.DoubleType
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.types.{DoubleType, FloatType}
 
 /**
  * :: Experimental ::
@@ -72,10 +73,13 @@ final class RegressionEvaluator @Since("1.4.0") (@Since("1.4.0") override val ui
   @Since("1.4.0")
   override def evaluate(dataset: DataFrame): Double = {
     val schema = dataset.schema
-    SchemaUtils.checkColumnType(schema, $(predictionCol), DoubleType)
-    SchemaUtils.checkColumnType(schema, $(labelCol), DoubleType)
+    val predictionType = schema($(predictionCol)).dataType
+    require(predictionType == FloatType || predictionType == DoubleType)
+    val labelType = schema($(labelCol)).dataType
+    require(labelType == FloatType || labelType == DoubleType)
 
-    val predictionAndLabels = dataset.select($(predictionCol), $(labelCol))
+    val predictionAndLabels = dataset
+      .select(col($(predictionCol)).cast(DoubleType), col($(labelCol)).cast(DoubleType))
       .map { case Row(prediction: Double, label: Double) =>
         (prediction, label)
       }

From c020f7d9d43548d27ae4a9564ba38981fd530cb1 Mon Sep 17 00:00:00 2001
From: vectorijk <jiangkai@gmail.com>
Date: Mon, 2 Nov 2015 16:12:04 -0800
Subject: [PATCH 451/896] [SPARK-10592] [ML] [PySpark] Deprecate weights and
 use coefficients instead in ML models

Deprecated in `LogisticRegression` and `LinearRegression`

Author: vectorijk <jiangkai@gmail.com>

Closes #9311 from vectorijk/spark-10592.
---
 R/pkg/R/mllib.R                               |   6 +-
 .../classification/LogisticRegression.scala   |  11 +-
 .../apache/spark/ml/r/SparkRWrappers.scala    |  15 +-
 .../ml/regression/AFTSurvivalRegression.scala |  32 +--
 .../ml/regression/IsotonicRegression.scala    |   4 +-
 .../ml/regression/LinearRegression.scala      |  15 +-
 .../ml/classification/JavaOneVsRestSuite.java |   6 +-
 .../LogisticRegressionSuite.scala             | 152 ++++++++-------
 .../MultilayerPerceptronClassifierSuite.scala |   6 +-
 .../ml/classification/OneVsRestSuite.scala    |   6 +-
 .../AFTSurvivalRegressionSuite.scala          |  12 +-
 .../ml/regression/LinearRegressionSuite.scala | 184 +++++++++---------
 python/pyspark/ml/classification.py           |  13 ++
 python/pyspark/ml/regression.py               |  12 ++
 14 files changed, 263 insertions(+), 211 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index aadd5b8da5e3..60bfadb8e750 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -92,9 +92,9 @@ setMethod("summary", signature(x = "PipelineModel"),
           function(x, ...) {
             features <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
                                    "getModelFeatures", x@model)
-            weights <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                   "getModelWeights", x@model)
-            coefficients <- as.matrix(unlist(weights))
+            coefficients <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
+                                   "getModelCoefficients", x@model)
+            coefficients <- as.matrix(unlist(coefficients))
             colnames(coefficients) <- c("Estimate")
             rownames(coefficients) <- unlist(features)
             return(list(coefficients = coefficients))
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index 6f839ff4d7cd..a1335e7a1bde 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -392,11 +392,14 @@ class LogisticRegression(override val uid: String)
 @Experimental
 class LogisticRegressionModel private[ml] (
     override val uid: String,
-    val weights: Vector,
+    val coefficients: Vector,
     val intercept: Double)
   extends ProbabilisticClassificationModel[Vector, LogisticRegressionModel]
   with LogisticRegressionParams {
 
+  @deprecated("Use coefficients instead.", "1.6.0")
+  def weights: Vector = coefficients
+
   override def setThreshold(value: Double): this.type = super.setThreshold(value)
 
   override def getThreshold: Double = super.getThreshold
@@ -407,7 +410,7 @@ class LogisticRegressionModel private[ml] (
 
   /** Margin (rawPrediction) for class label 1.  For binary classification only. */
   private val margin: Vector => Double = (features) => {
-    BLAS.dot(features, weights) + intercept
+    BLAS.dot(features, coefficients) + intercept
   }
 
   /** Score (probability) for class label 1.  For binary classification only. */
@@ -416,7 +419,7 @@ class LogisticRegressionModel private[ml] (
     1.0 / (1.0 + math.exp(-m))
   }
 
-  override val numFeatures: Int = weights.size
+  override val numFeatures: Int = coefficients.size
 
   override val numClasses: Int = 2
 
@@ -483,7 +486,7 @@ class LogisticRegressionModel private[ml] (
   }
 
   override def copy(extra: ParamMap): LogisticRegressionModel = {
-    val newModel = copyValues(new LogisticRegressionModel(uid, weights, intercept), extra)
+    val newModel = copyValues(new LogisticRegressionModel(uid, coefficients, intercept), extra)
     if (trainingSummary.isDefined) newModel.setSummary(trainingSummary.get)
     newModel.setParent(parent)
   }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index 21ebf6d916db..9162ec0e4e15 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -51,13 +51,22 @@ private[r] object SparkRWrappers {
     pipeline.fit(df)
   }
 
+  @deprecated("Use getModelCoefficients instead.", "1.6.0")
   def getModelWeights(model: PipelineModel): Array[Double] = {
     model.stages.last match {
       case m: LinearRegressionModel =>
         Array(m.intercept) ++ m.weights.toArray
-      case _: LogisticRegressionModel =>
-        throw new UnsupportedOperationException(
-          "No weights available for LogisticRegressionModel")  // SPARK-9492
+      case m: LogisticRegressionModel =>
+        Array(m.intercept) ++ m.weights.toArray
+    }
+  }
+
+  def getModelCoefficients(model: PipelineModel): Array[Double] = {
+    model.stages.last match {
+      case m: LinearRegressionModel =>
+        Array(m.intercept) ++ m.coefficients.toArray
+      case m: LogisticRegressionModel =>
+        Array(m.intercept) ++ m.coefficients.toArray
     }
   }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index ac2c3d825f13..4dbbc7d39931 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -200,17 +200,17 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 
     val numFeatures = dataset.select($(featuresCol)).take(1)(0).getAs[Vector](0).size
     /*
-       The weights vector has three parts:
+       The coefficients vector has three parts:
        the first element: Double, log(sigma), the log of scale parameter
        the second element: Double, intercept of the beta parameter
        the third to the end elements: Doubles, regression coefficients vector of the beta parameter
      */
-    val initialWeights = Vectors.zeros(numFeatures + 2)
+    val initialCoefficients = Vectors.zeros(numFeatures + 2)
 
     val states = optimizer.iterations(new CachedDiffFunction(costFun),
-      initialWeights.toBreeze.toDenseVector)
+      initialCoefficients.toBreeze.toDenseVector)
 
-    val weights = {
+    val coefficients = {
       val arrayBuilder = mutable.ArrayBuilder.make[Double]
       var state: optimizer.State = null
       while (states.hasNext) {
@@ -227,10 +227,10 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 
     if (handlePersistence) instances.unpersist()
 
-    val coefficients = Vectors.dense(weights.slice(2, weights.length))
-    val intercept = weights(1)
-    val scale = math.exp(weights(0))
-    val model = new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale)
+    val regressionCoefficients = Vectors.dense(coefficients.slice(2, coefficients.length))
+    val intercept = coefficients(1)
+    val scale = math.exp(coefficients(0))
+    val model = new AFTSurvivalRegressionModel(uid, regressionCoefficients, intercept, scale)
     copyValues(model.setParent(this))
   }
 
@@ -251,7 +251,7 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 @Since("1.6.0")
 class AFTSurvivalRegressionModel private[ml] (
     @Since("1.6.0") override val uid: String,
-    @Since("1.6.0") val coefficients: Vector,
+    @Since("1.6.0") val regressionCoefficients: Vector,
     @Since("1.6.0") val intercept: Double,
     @Since("1.6.0") val scale: Double)
   extends Model[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams {
@@ -275,7 +275,7 @@ class AFTSurvivalRegressionModel private[ml] (
   @Since("1.6.0")
   def predictQuantiles(features: Vector): Vector = {
     // scale parameter for the Weibull distribution of lifetime
-    val lambda = math.exp(BLAS.dot(coefficients, features) + intercept)
+    val lambda = math.exp(BLAS.dot(regressionCoefficients, features) + intercept)
     // shape parameter for the Weibull distribution of lifetime
     val k = 1 / scale
     val quantiles = $(quantileProbabilities).map {
@@ -286,7 +286,7 @@ class AFTSurvivalRegressionModel private[ml] (
 
   @Since("1.6.0")
   def predict(features: Vector): Double = {
-    math.exp(BLAS.dot(coefficients, features) + intercept)
+    math.exp(BLAS.dot(regressionCoefficients, features) + intercept)
   }
 
   @Since("1.6.0")
@@ -309,7 +309,7 @@ class AFTSurvivalRegressionModel private[ml] (
 
   @Since("1.6.0")
   override def copy(extra: ParamMap): AFTSurvivalRegressionModel = {
-    copyValues(new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale), extra)
+    copyValues(new AFTSurvivalRegressionModel(uid, regressionCoefficients, intercept, scale), extra)
       .setParent(parent)
   }
 }
@@ -369,17 +369,17 @@ class AFTSurvivalRegressionModel private[ml] (
  *   \frac{\partial (-\iota)}{\partial (\log\sigma)}=
  *   \sum_{i=1}^{n}[\delta_{i}+(\delta_{i}-e^{\epsilon_{i}})\epsilon_{i}]
  * }}}
- * @param weights The log of scale parameter, the intercept and
+ * @param coefficients including three part: The log of scale parameter, the intercept and
  *                regression coefficients corresponding to the features.
  * @param fitIntercept Whether to fit an intercept term.
  */
-private class AFTAggregator(weights: BDV[Double], fitIntercept: Boolean)
+private class AFTAggregator(coefficients: BDV[Double], fitIntercept: Boolean)
   extends Serializable {
 
   // beta is the intercept and regression coefficients to the covariates
-  private val beta = weights.slice(1, weights.length)
+  private val beta = coefficients.slice(1, coefficients.length)
   // sigma is the scale parameter of the AFT model
-  private val sigma = math.exp(weights(0))
+  private val sigma = math.exp(coefficients(0))
 
   private var totalCnt: Long = 0L
   private var lossSum = 0.0
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
index 2ff500f291ab..f4a17c8f9a58 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
@@ -87,8 +87,8 @@ private[regression] trait IsotonicRegressionBase extends Params with HasFeatures
       lit(1.0)
     }
     dataset.select(col($(labelCol)), f, w)
-      .map { case Row(label: Double, feature: Double, weights: Double) =>
-      (label, feature, weights)
+      .map { case Row(label: Double, feature: Double, weight: Double) =>
+      (label, feature, weight)
     }
   }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index f663b9bd9ac7..6e9c7442b811 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -203,7 +203,7 @@ class LinearRegression(override val uid: String)
     val yMean = ySummarizer.mean(0)
     val yStd = math.sqrt(ySummarizer.variance(0))
 
-    // If the yStd is zero, then the intercept is yMean with zero weights;
+    // If the yStd is zero, then the intercept is yMean with zero coefficient;
     // as a result, training is not needed.
     if (yStd == 0.0) {
       logWarning(s"The standard deviation of the label is zero, so the coefficients will be " +
@@ -331,14 +331,17 @@ class LinearRegression(override val uid: String)
 @Experimental
 class LinearRegressionModel private[ml] (
     override val uid: String,
-    val weights: Vector,
+    val coefficients: Vector,
     val intercept: Double)
   extends RegressionModel[Vector, LinearRegressionModel]
   with LinearRegressionParams {
 
   private var trainingSummary: Option[LinearRegressionTrainingSummary] = None
 
-  override val numFeatures: Int = weights.size
+  @deprecated("Use coefficients instead.", "1.6.0")
+  def weights: Vector = coefficients
+
+  override val numFeatures: Int = coefficients.size
 
   /**
    * Gets summary (e.g. residuals, mse, r-squared ) of model on training set. An exception is
@@ -387,11 +390,11 @@ class LinearRegressionModel private[ml] (
 
 
   override protected def predict(features: Vector): Double = {
-    dot(features, weights) + intercept
+    dot(features, coefficients) + intercept
   }
 
   override def copy(extra: ParamMap): LinearRegressionModel = {
-    val newModel = copyValues(new LinearRegressionModel(uid, weights, intercept), extra)
+    val newModel = copyValues(new LinearRegressionModel(uid, coefficients, intercept), extra)
     if (trainingSummary.isDefined) newModel.setSummary(trainingSummary.get)
     newModel.setParent(parent)
   }
@@ -400,7 +403,7 @@ class LinearRegressionModel private[ml] (
 /**
  * :: Experimental ::
  * Linear regression training results. Currently, the training summary ignores the
- * training weights except for the objective trace.
+ * training coefficients except for the objective trace.
  * @param predictions predictions outputted by the model's `transform` method.
  * @param objectiveHistory objective function (scaled loss + regularization) at each iteration.
  */
diff --git a/mllib/src/test/java/org/apache/spark/ml/classification/JavaOneVsRestSuite.java b/mllib/src/test/java/org/apache/spark/ml/classification/JavaOneVsRestSuite.java
index 253cabf0133d..cbabafe1b541 100644
--- a/mllib/src/test/java/org/apache/spark/ml/classification/JavaOneVsRestSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/classification/JavaOneVsRestSuite.java
@@ -47,16 +47,16 @@ public void setUp() {
         jsql = new SQLContext(jsc);
         int nPoints = 3;
 
-        // The following weights and xMean/xVariance are computed from iris dataset with lambda=0.2.
+        // The following coefficients and xMean/xVariance are computed from iris dataset with lambda=0.2.
         // As a result, we are drawing samples from probability distribution of an actual model.
-        double[] weights = {
+        double[] coefficients = {
                 -0.57997, 0.912083, -0.371077, -0.819866, 2.688191,
                 -0.16624, -0.84355, -0.048509, -0.301789, 4.170682 };
 
         double[] xMean = {5.843, 3.057, 3.758, 1.199};
         double[] xVariance = {0.6856, 0.1899, 3.116, 0.581};
         List<LabeledPoint> points = JavaConverters.seqAsJavaListConverter(
-            generateMultinomialLogisticInput(weights, xMean, xVariance, true, nPoints, 42)
+            generateMultinomialLogisticInput(coefficients, xMean, xVariance, true, nPoints, 42)
         ).asJava();
         datasetRDD = jsc.parallelize(points, 2);
         dataset = jsql.createDataFrame(datasetRDD, LabeledPoint.class);
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index e0a795e5e0b0..325faf37e8ee 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -48,21 +48,22 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
 
        import org.apache.spark.mllib.classification.LogisticRegressionSuite
        val nPoints = 10000
-       val weights = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
+       val coefficients = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
        val xMean = Array(5.843, 3.057, 3.758, 1.199)
        val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
        val data = sc.parallelize(LogisticRegressionSuite.generateMultinomialLogisticInput(
-         weights, xMean, xVariance, true, nPoints, 42), 1)
+         coefficients, xMean, xVariance, true, nPoints, 42), 1)
        data.map(x=> x.label + ", " + x.features(0) + ", " + x.features(1) + ", "
          + x.features(2) + ", " + x.features(3)).saveAsTextFile("path")
      */
     binaryDataset = {
       val nPoints = 10000
-      val weights = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
+      val coefficients = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
       val xMean = Array(5.843, 3.057, 3.758, 1.199)
       val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
 
-      val testData = generateMultinomialLogisticInput(weights, xMean, xVariance, true, nPoints, 42)
+      val testData =
+        generateMultinomialLogisticInput(coefficients, xMean, xVariance, true, nPoints, 42)
 
       sqlContext.createDataFrame(sc.parallelize(testData, 4))
     }
@@ -296,8 +297,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 0))
-       weights
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 0))
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                            s0
@@ -308,14 +309,14 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.7996864
      */
     val interceptR = 2.8366423
-    val weightsR = Vectors.dense(-0.5895848, 0.8931147, -0.3925051, -0.7996864)
+    val coefficientsR = Vectors.dense(-0.5895848, 0.8931147, -0.3925051, -0.7996864)
 
     assert(model1.intercept ~== interceptR relTol 1E-3)
-    assert(model1.weights ~= weightsR relTol 1E-3)
+    assert(model1.coefficients ~= coefficientsR relTol 1E-3)
 
     // Without regularization, with or without standardization will converge to the same solution.
     assert(model2.intercept ~== interceptR relTol 1E-3)
-    assert(model2.weights ~= weightsR relTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR relTol 1E-3)
   }
 
   test("binary logistic regression without intercept without regularization") {
@@ -332,9 +333,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights =
+       coefficients =
            coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 0, intercept=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                            s0
@@ -345,14 +346,14 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.7407946
      */
     val interceptR = 0.0
-    val weightsR = Vectors.dense(-0.3534996, 1.2964482, -0.3571741, -0.7407946)
+    val coefficientsR = Vectors.dense(-0.3534996, 1.2964482, -0.3571741, -0.7407946)
 
     assert(model1.intercept ~== interceptR relTol 1E-3)
-    assert(model1.weights ~= weightsR relTol 1E-2)
+    assert(model1.coefficients ~= coefficientsR relTol 1E-2)
 
     // Without regularization, with or without standardization should converge to the same solution.
     assert(model2.intercept ~== interceptR relTol 1E-3)
-    assert(model2.weights ~= weightsR relTol 1E-2)
+    assert(model2.coefficients ~= coefficientsR relTol 1E-2)
   }
 
   test("binary logistic regression with intercept with L1 regularization") {
@@ -371,8 +372,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12))
-       weights
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12))
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -383,10 +384,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.02481551
      */
     val interceptR1 = -0.05627428
-    val weightsR1 = Vectors.dense(0.0, 0.0, -0.04325749, -0.02481551)
+    val coefficientsR1 = Vectors.dense(0.0, 0.0, -0.04325749, -0.02481551)
 
     assert(model1.intercept ~== interceptR1 relTol 1E-2)
-    assert(model1.weights ~= weightsR1 absTol 2E-2)
+    assert(model1.coefficients ~= coefficientsR1 absTol 2E-2)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -395,9 +396,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
            standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                            s0
@@ -408,10 +409,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5       .
      */
     val interceptR2 = 0.3722152
-    val weightsR2 = Vectors.dense(0.0, 0.0, -0.1665453, 0.0)
+    val coefficientsR2 = Vectors.dense(0.0, 0.0, -0.1665453, 0.0)
 
     assert(model2.intercept ~== interceptR2 relTol 1E-2)
-    assert(model2.weights ~= weightsR2 absTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR2 absTol 1E-3)
   }
 
   test("binary logistic regression without intercept with L1 regularization") {
@@ -430,9 +431,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
            intercept=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -443,10 +444,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.03891782
      */
     val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(0.0, 0.0, -0.05189203, -0.03891782)
+    val coefficientsR1 = Vectors.dense(0.0, 0.0, -0.05189203, -0.03891782)
 
     assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 absTol 1E-3)
+    assert(model1.coefficients ~= coefficientsR1 absTol 1E-3)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -455,9 +456,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 1, lambda = 0.12,
            intercept=FALSE, standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -468,10 +469,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5       .
      */
     val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(0.0, 0.0, -0.08420782, 0.0)
+    val coefficientsR2 = Vectors.dense(0.0, 0.0, -0.08420782, 0.0)
 
     assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 absTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR2 absTol 1E-3)
   }
 
   test("binary logistic regression with intercept with L2 regularization") {
@@ -490,8 +491,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37))
-       weights
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37))
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -502,10 +503,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.10062872
      */
     val interceptR1 = 0.15021751
-    val weightsR1 = Vectors.dense(-0.07251837, 0.10724191, -0.04865309, -0.10062872)
+    val coefficientsR1 = Vectors.dense(-0.07251837, 0.10724191, -0.04865309, -0.10062872)
 
     assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-3)
+    assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -514,9 +515,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
            standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -527,10 +528,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.06266838
      */
     val interceptR2 = 0.48657516
-    val weightsR2 = Vectors.dense(-0.05155371, 0.02301057, -0.11482896, -0.06266838)
+    val coefficientsR2 = Vectors.dense(-0.05155371, 0.02301057, -0.11482896, -0.06266838)
 
     assert(model2.intercept ~== interceptR2 relTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
   }
 
   test("binary logistic regression without intercept with L2 regularization") {
@@ -549,9 +550,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
            intercept=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -562,10 +563,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.09799775
      */
     val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(-0.06099165, 0.12857058, -0.04708770, -0.09799775)
+    val coefficientsR1 = Vectors.dense(-0.06099165, 0.12857058, -0.04708770, -0.09799775)
 
     assert(model1.intercept ~== interceptR1 absTol 1E-3)
-    assert(model1.weights ~= weightsR1 relTol 1E-2)
+    assert(model1.coefficients ~= coefficientsR1 relTol 1E-2)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -574,9 +575,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0, lambda = 1.37,
            intercept=FALSE, standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                              s0
@@ -587,10 +588,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.053314311
      */
     val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(-0.005679651, 0.048967094, -0.093714016, -0.053314311)
+    val coefficientsR2 = Vectors.dense(-0.005679651, 0.048967094, -0.093714016, -0.053314311)
 
     assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 relTol 1E-2)
+    assert(model2.coefficients ~= coefficientsR2 relTol 1E-2)
   }
 
   test("binary logistic regression with intercept with ElasticNet regularization") {
@@ -609,8 +610,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21))
-       weights
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21))
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -621,10 +622,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.15458796
      */
     val interceptR1 = 0.57734851
-    val weightsR1 = Vectors.dense(-0.05310287, 0.0, -0.08849250, -0.15458796)
+    val coefficientsR1 = Vectors.dense(-0.05310287, 0.0, -0.08849250, -0.15458796)
 
     assert(model1.intercept ~== interceptR1 relTol 6E-3)
-    assert(model1.weights ~== weightsR1 absTol 5E-3)
+    assert(model1.coefficients ~== coefficientsR1 absTol 5E-3)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -633,9 +634,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
            standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -646,10 +647,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.05350074
      */
     val interceptR2 = 0.51555993
-    val weightsR2 = Vectors.dense(0.0, 0.0, -0.18807395, -0.05350074)
+    val coefficientsR2 = Vectors.dense(0.0, 0.0, -0.18807395, -0.05350074)
 
     assert(model2.intercept ~== interceptR2 relTol 6E-3)
-    assert(model2.weights ~= weightsR2 absTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR2 absTol 1E-3)
   }
 
   test("binary logistic regression without intercept with ElasticNet regularization") {
@@ -668,9 +669,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
            intercept=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -681,10 +682,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5     -0.142534158
      */
     val interceptR1 = 0.0
-    val weightsR1 = Vectors.dense(-0.001005743, 0.072577857, -0.081203769, -0.142534158)
+    val coefficientsR1 = Vectors.dense(-0.001005743, 0.072577857, -0.081203769, -0.142534158)
 
     assert(model1.intercept ~== interceptR1 relTol 1E-3)
-    assert(model1.weights ~= weightsR1 absTol 1E-2)
+    assert(model1.coefficients ~= coefficientsR1 absTol 1E-2)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -693,9 +694,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 0.38, lambda = 0.21,
            intercept=FALSE, standardize=FALSE))
-       weights
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -706,10 +707,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5       .
      */
     val interceptR2 = 0.0
-    val weightsR2 = Vectors.dense(0.0, 0.03345223, -0.11304532, 0.0)
+    val coefficientsR2 = Vectors.dense(0.0, 0.03345223, -0.11304532, 0.0)
 
     assert(model2.intercept ~== interceptR2 absTol 1E-3)
-    assert(model2.weights ~= weightsR2 absTol 1E-3)
+    assert(model2.coefficients ~= coefficientsR2 absTol 1E-3)
   }
 
   test("binary logistic regression with intercept with strong L1 regularization") {
@@ -732,8 +733,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         }).histogram
 
     /*
-       For binary logistic regression with strong L1 regularization, all the weights will be zeros.
-       As a result,
+       For binary logistic regression with strong L1 regularization, all the coefficients
+       will be zeros. As a result,
        {{{
        P(0) = 1 / (1 + \exp(b)), and
        P(1) = \exp(b) / (1 + \exp(b))
@@ -743,13 +744,13 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        }}}
      */
     val interceptTheory = math.log(histogram(1) / histogram(0))
-    val weightsTheory = Vectors.dense(0.0, 0.0, 0.0, 0.0)
+    val coefficientsTheory = Vectors.dense(0.0, 0.0, 0.0, 0.0)
 
     assert(model1.intercept ~== interceptTheory relTol 1E-5)
-    assert(model1.weights ~= weightsTheory absTol 1E-6)
+    assert(model1.coefficients ~= coefficientsTheory absTol 1E-6)
 
     assert(model2.intercept ~== interceptTheory relTol 1E-5)
-    assert(model2.weights ~= weightsTheory absTol 1E-6)
+    assert(model2.coefficients ~= coefficientsTheory absTol 1E-6)
 
     /*
        Using the following R code to load the data and train the model using glmnet package.
@@ -758,8 +759,8 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data <- read.csv("path", header=FALSE)
        label = factor(data$V1)
        features = as.matrix(data.frame(data$V2, data$V3, data$V4, data$V5))
-       weights = coef(glmnet(features,label, family="binomial", alpha = 1.0, lambda = 6.0))
-       weights
+       coefficients = coef(glmnet(features,label, family="binomial", alpha = 1.0, lambda = 6.0))
+       coefficients
 
        5 x 1 sparse Matrix of class "dgCMatrix"
                             s0
@@ -770,10 +771,10 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
        data.V5       .
      */
     val interceptR = -0.248065
-    val weightsR = Vectors.dense(0.0, 0.0, 0.0, 0.0)
+    val coefficientsR = Vectors.dense(0.0, 0.0, 0.0, 0.0)
 
     assert(model1.intercept ~== interceptR relTol 1E-5)
-    assert(model1.weights ~== weightsR absTol 1E-6)
+    assert(model1.coefficients ~== coefficientsR absTol 1E-6)
   }
 
   test("evaluate on test set") {
@@ -814,10 +815,11 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("binary logistic regression with weighted samples") {
     val (dataset, weightedDataset) = {
       val nPoints = 1000
-      val weights = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
+      val coefficients = Array(-0.57997, 0.912083, -0.371077, -0.819866, 2.688191)
       val xMean = Array(5.843, 3.057, 3.758, 1.199)
       val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
-      val testData = generateMultinomialLogisticInput(weights, xMean, xVariance, true, nPoints, 42)
+      val testData =
+        generateMultinomialLogisticInput(coefficients, xMean, xVariance, true, nPoints, 42)
 
       // Let's over-sample the positive samples twice.
       val data1 = testData.flatMap { case labeledPoint: LabeledPoint =>
@@ -863,9 +865,9 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     val model1a0 = trainer1a.fit(dataset)
     val model1a1 = trainer1a.fit(weightedDataset)
     val model1b = trainer1b.fit(weightedDataset)
-    assert(model1a0.weights !~= model1a1.weights absTol 1E-3)
+    assert(model1a0.coefficients !~= model1a1.coefficients absTol 1E-3)
     assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
-    assert(model1a0.weights ~== model1b.weights absTol 1E-3)
+    assert(model1a0.coefficients ~== model1b.coefficients absTol 1E-3)
     assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
 
   }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
index 2d1df9b2b82e..17db8c44777d 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
@@ -53,16 +53,16 @@ class MultilayerPerceptronClassifierSuite extends SparkFunSuite with MLlibTestSp
   test("3 class classification with 2 hidden layers") {
     val nPoints = 1000
 
-    // The following weights are taken from OneVsRestSuite.scala
+    // The following coefficients are taken from OneVsRestSuite.scala
     // they represent 3-class iris dataset
-    val weights = Array(
+    val coefficients = Array(
       -0.57997, 0.912083, -0.371077, -0.819866, 2.688191,
       -0.16624, -0.84355, -0.048509, -0.301789, 4.170682)
 
     val xMean = Array(5.843, 3.057, 3.758, 1.199)
     val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
     val rdd = sc.parallelize(generateMultinomialLogisticInput(
-      weights, xMean, xVariance, true, nPoints, 42), 2)
+      coefficients, xMean, xVariance, true, nPoints, 42), 2)
     val dataFrame = sqlContext.createDataFrame(rdd).toDF("label", "features")
     val numClasses = 3
     val numIterations = 100
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/OneVsRestSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/OneVsRestSuite.scala
index 977f0e0b70c1..5ea71c5317b7 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/OneVsRestSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/OneVsRestSuite.scala
@@ -43,16 +43,16 @@ class OneVsRestSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     val nPoints = 1000
 
-    // The following weights and xMean/xVariance are computed from iris dataset with lambda=0.2.
+    // The following coefficients and xMean/xVariance are computed from iris dataset with lambda=0.2
     // As a result, we are drawing samples from probability distribution of an actual model.
-    val weights = Array(
+    val coefficients = Array(
       -0.57997, 0.912083, -0.371077, -0.819866, 2.688191,
       -0.16624, -0.84355, -0.048509, -0.301789, 4.170682)
 
     val xMean = Array(5.843, 3.057, 3.758, 1.199)
     val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
     rdd = sc.parallelize(generateMultinomialLogisticInput(
-      weights, xMean, xVariance, true, nPoints, 42), 2)
+      coefficients, xMean, xVariance, true, nPoints, 42), 2)
     dataset = sqlContext.createDataFrame(rdd)
   }
 
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
index 359f31027172..c0f791bce13d 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
@@ -141,12 +141,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 5
        n= 1000
      */
-    val coefficientsR = Vectors.dense(-0.039)
+    val regressionCoefficientsR = Vectors.dense(-0.039)
     val interceptR = 1.759
     val scaleR = 1.41
 
     assert(model.intercept ~== interceptR relTol 1E-3)
-    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*
@@ -212,12 +212,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 5
        n= 1000
      */
-    val coefficientsR = Vectors.dense(-0.0844, 0.0677)
+    val regressionCoefficientsR = Vectors.dense(-0.0844, 0.0677)
     val interceptR = 1.9206
     val scaleR = 0.977
 
     assert(model.intercept ~== interceptR relTol 1E-3)
-    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*
@@ -282,12 +282,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 6
        n= 1000
      */
-    val coefficientsR = Vectors.dense(0.896, -0.709)
+    val regressionCoefficientsR = Vectors.dense(0.896, -0.709)
     val interceptR = 0.0
     val scaleR = 1.52
 
     assert(model.intercept === interceptR)
-    assert(model.coefficients ~== coefficientsR relTol 1E-3)
+    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index a2a5c0bbdcb9..235c796d785a 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -122,8 +122,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          data <- read.csv("path", header=FALSE, stringsAsFactors=FALSE)
          features <- as.matrix(data.frame(as.numeric(data$V2), as.numeric(data$V3)))
          label <- as.numeric(data$V1)
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0))
-         > weights
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0))
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         6.298698
@@ -131,17 +131,18 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          as.numeric.data.V3. 7.199082
        */
       val interceptR = 6.298698
-      val weightsR = Vectors.dense(4.700706, 7.199082)
+      val coefficientsR = Vectors.dense(4.700706, 7.199082)
 
       assert(model1.intercept ~== interceptR relTol 1E-3)
-      assert(model1.weights ~= weightsR relTol 1E-3)
+      assert(model1.coefficients ~= coefficientsR relTol 1E-3)
       assert(model2.intercept ~== interceptR relTol 1E-3)
-      assert(model2.weights ~= weightsR relTol 1E-3)
+      assert(model2.coefficients ~= coefficientsR relTol 1E-3)
 
       model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
-            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+              model1.intercept
           assert(prediction1 ~== prediction2 relTol 1E-5)
       }
     }
@@ -159,37 +160,37 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val modelWithoutIntercept2 = trainer2.fit(datasetWithDenseFeatureWithoutIntercept)
 
       /*
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0,
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0, lambda = 0,
            intercept = FALSE))
-         > weights
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         .
          as.numeric.data.V2. 6.995908
          as.numeric.data.V3. 5.275131
        */
-      val weightsR = Vectors.dense(6.995908, 5.275131)
+      val coefficientsR = Vectors.dense(6.995908, 5.275131)
 
       assert(model1.intercept ~== 0 absTol 1E-3)
-      assert(model1.weights ~= weightsR relTol 1E-3)
+      assert(model1.coefficients ~= coefficientsR relTol 1E-3)
       assert(model2.intercept ~== 0 absTol 1E-3)
-      assert(model2.weights ~= weightsR relTol 1E-3)
+      assert(model2.coefficients ~= coefficientsR relTol 1E-3)
 
       /*
          Then again with the data with no intercept:
-         > weightsWithoutIntercept
+         > coefficientsWithourIntercept
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)           .
          as.numeric.data3.V2. 4.70011
          as.numeric.data3.V3. 7.19943
        */
-      val weightsWithoutInterceptR = Vectors.dense(4.70011, 7.19943)
+      val coefficientsWithourInterceptR = Vectors.dense(4.70011, 7.19943)
 
       assert(modelWithoutIntercept1.intercept ~== 0 absTol 1E-3)
-      assert(modelWithoutIntercept1.weights ~= weightsWithoutInterceptR relTol 1E-3)
+      assert(modelWithoutIntercept1.coefficients ~= coefficientsWithourInterceptR relTol 1E-3)
       assert(modelWithoutIntercept2.intercept ~== 0 absTol 1E-3)
-      assert(modelWithoutIntercept2.weights ~= weightsWithoutInterceptR relTol 1E-3)
+      assert(modelWithoutIntercept2.coefficients ~= coefficientsWithourInterceptR relTol 1E-3)
     }
   }
 
@@ -211,8 +212,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian",
+             alpha = 1.0, lambda = 0.57 ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                     s0
            (Intercept)         6.24300
@@ -220,14 +222,14 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 6.679841
          */
         val interceptR1 = 6.24300
-        val weightsR1 = Vectors.dense(4.024821, 6.679841)
+        val coefficientsR1 = Vectors.dense(4.024821, 6.679841)
         assert(model1.intercept ~== interceptR1 relTol 1E-3)
-        assert(model1.weights ~= weightsR1 relTol 1E-3)
+        assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-             standardize=FALSE))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 1.0,
+             lambda = 0.57, standardize=FALSE ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                     s0
            (Intercept)         6.416948
@@ -235,16 +237,17 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 6.724286
          */
         val interceptR2 = 6.416948
-        val weightsR2 = Vectors.dense(3.893869, 6.724286)
+        val coefficientsR2 = Vectors.dense(3.893869, 6.724286)
 
         assert(model2.intercept ~== interceptR2 relTol 1E-3)
-        assert(model2.weights ~= weightsR2 relTol 1E-3)
+        assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
         model1.transform(datasetWithDenseFeature).select("features", "prediction")
           .collect().foreach {
             case Row(features: DenseVector, prediction1: Double) =>
-              val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
-                model1.intercept
+              val prediction2 =
+                features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+                  model1.intercept
               assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -269,9 +272,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-             intercept=FALSE))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 1.0,
+             lambda = 0.57, intercept=FALSE ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                      s0
            (Intercept)          .
@@ -279,15 +282,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 4.772913
          */
         val interceptR1 = 0.0
-        val weightsR1 = Vectors.dense(6.299752, 4.772913)
+        val coefficientsR1 = Vectors.dense(6.299752, 4.772913)
 
         assert(model1.intercept ~== interceptR1 absTol 1E-3)
-        assert(model1.weights ~= weightsR1 relTol 1E-3)
+        assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 1.0, lambda = 0.57,
-             intercept=FALSE, standardize=FALSE))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 1.0,
+             lambda = 0.57, intercept=FALSE, standardize=FALSE ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                      s0
            (Intercept)         .
@@ -295,16 +298,17 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 4.764229
          */
         val interceptR2 = 0.0
-        val weightsR2 = Vectors.dense(6.232193, 4.764229)
+        val coefficientsR2 = Vectors.dense(6.232193, 4.764229)
 
         assert(model2.intercept ~== interceptR2 absTol 1E-3)
-        assert(model2.weights ~= weightsR2 relTol 1E-3)
+        assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
         model1.transform(datasetWithDenseFeature).select("features", "prediction")
           .collect().foreach {
             case Row(features: DenseVector, prediction1: Double) =>
-              val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
-                model1.intercept
+              val prediction2 =
+                features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+                  model1.intercept
               assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -321,8 +325,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model2 = trainer2.fit(datasetWithDenseFeature)
 
       /*
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3))
-         > weights
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3))
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         5.269376
@@ -330,15 +334,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          as.numeric.data.V3. 5.712356)
        */
       val interceptR1 = 5.269376
-      val weightsR1 = Vectors.dense(3.736216, 5.712356)
+      val coefficientsR1 = Vectors.dense(3.736216, 5.712356)
 
       assert(model1.intercept ~== interceptR1 relTol 1E-3)
-      assert(model1.weights ~= weightsR1 relTol 1E-3)
+      assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
       /*
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
            standardize=FALSE))
-         > weights
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         5.791109
@@ -346,15 +350,16 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          as.numeric.data.V3. 5.910406
        */
       val interceptR2 = 5.791109
-      val weightsR2 = Vectors.dense(3.435466, 5.910406)
+      val coefficientsR2 = Vectors.dense(3.435466, 5.910406)
 
       assert(model2.intercept ~== interceptR2 relTol 1E-3)
-      assert(model2.weights ~= weightsR2 relTol 1E-3)
+      assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
       model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
-            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+              model1.intercept
           assert(prediction1 ~== prediction2 relTol 1E-5)
       }
     }
@@ -370,9 +375,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model2 = trainer2.fit(datasetWithDenseFeature)
 
       /*
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
            intercept = FALSE))
-         > weights
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         .
@@ -380,15 +385,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          as.numeric.data.V3. 4.214502
        */
       val interceptR1 = 0.0
-      val weightsR1 = Vectors.dense(5.522875, 4.214502)
+      val coefficientsR1 = Vectors.dense(5.522875, 4.214502)
 
       assert(model1.intercept ~== interceptR1 absTol 1E-3)
-      assert(model1.weights ~= weightsR1 relTol 1E-3)
+      assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
       /*
-         weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
+         coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.0, lambda = 2.3,
            intercept = FALSE, standardize=FALSE))
-         > weights
+         > coefficients
           3 x 1 sparse Matrix of class "dgCMatrix"
                                    s0
          (Intercept)         .
@@ -396,15 +401,16 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
          as.numeric.data.V3. 4.187419
        */
       val interceptR2 = 0.0
-      val weightsR2 = Vectors.dense(5.263704, 4.187419)
+      val coefficientsR2 = Vectors.dense(5.263704, 4.187419)
 
       assert(model2.intercept ~== interceptR2 absTol 1E-3)
-      assert(model2.weights ~= weightsR2 relTol 1E-3)
+      assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
       model1.transform(datasetWithDenseFeature).select("features", "prediction").collect().foreach {
         case Row(features: DenseVector, prediction1: Double) =>
           val prediction2 =
-            features(0) * model1.weights(0) + features(1) * model1.weights(1) + model1.intercept
+            features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+              model1.intercept
           assert(prediction1 ~== prediction2 relTol 1E-5)
       }
     }
@@ -428,8 +434,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.3,
+             lambda = 1.6 ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                      s0
            (Intercept)         6.324108
@@ -437,15 +444,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 5.200403
          */
         val interceptR1 = 5.696056
-        val weightsR1 = Vectors.dense(3.670489, 6.001122)
+        val coefficientsR1 = Vectors.dense(3.670489, 6.001122)
 
         assert(model1.intercept ~== interceptR1 relTol 1E-3)
-        assert(model1.weights ~= weightsR1 relTol 1E-3)
+        assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6
              standardize=FALSE))
-           > weights
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                      s0
            (Intercept)         6.114723
@@ -453,16 +460,17 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 6.146531
          */
         val interceptR2 = 6.114723
-        val weightsR2 = Vectors.dense(3.409937, 6.146531)
+        val coefficientsR2 = Vectors.dense(3.409937, 6.146531)
 
         assert(model2.intercept ~== interceptR2 relTol 1E-3)
-        assert(model2.weights ~= weightsR2 relTol 1E-3)
+        assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
         model1.transform(datasetWithDenseFeature).select("features", "prediction")
           .collect().foreach {
           case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
-              model1.intercept
+            val prediction2 =
+              features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+                model1.intercept
             assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -487,9 +495,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         val model2 = trainer2.fit(datasetWithDenseFeature)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
-             intercept=FALSE))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.3,
+             lambda = 1.6, intercept=FALSE ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                       s0
            (Intercept)         .
@@ -497,15 +505,15 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.dataM.V3. 4.322251
          */
         val interceptR1 = 0.0
-        val weightsR1 = Vectors.dense(5.673348, 4.322251)
+        val coefficientsR1 = Vectors.dense(5.673348, 4.322251)
 
         assert(model1.intercept ~== interceptR1 absTol 1E-3)
-        assert(model1.weights ~= weightsR1 relTol 1E-3)
+        assert(model1.coefficients ~= coefficientsR1 relTol 1E-3)
 
         /*
-           weights <- coef(glmnet(features, label, family="gaussian", alpha = 0.3, lambda = 1.6,
-             intercept=FALSE, standardize=FALSE))
-           > weights
+           coefficients <- coef(glmnet(features, label, family="gaussian", alpha = 0.3,
+             lambda = 1.6, intercept=FALSE, standardize=FALSE ))
+           > coefficients
             3 x 1 sparse Matrix of class "dgCMatrix"
                                      s0
            (Intercept)         .
@@ -513,16 +521,17 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
            as.numeric.data.V3. 4.297622
          */
         val interceptR2 = 0.0
-        val weightsR2 = Vectors.dense(5.477988, 4.297622)
+        val coefficientsR2 = Vectors.dense(5.477988, 4.297622)
 
         assert(model2.intercept ~== interceptR2 absTol 1E-3)
-        assert(model2.weights ~= weightsR2 relTol 1E-3)
+        assert(model2.coefficients ~= coefficientsR2 relTol 1E-3)
 
         model1.transform(datasetWithDenseFeature).select("features", "prediction")
           .collect().foreach {
           case Row(features: DenseVector, prediction1: Double) =>
-            val prediction2 = features(0) * model1.weights(0) + features(1) * model1.weights(1) +
-              model1.intercept
+            val prediction2 =
+              features(0) * model1.coefficients(0) + features(1) * model1.coefficients(1) +
+                model1.intercept
             assert(prediction1 ~== prediction2 relTol 1E-5)
         }
       }
@@ -554,7 +563,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val expectedResiduals = datasetWithDenseFeature.select("features", "label")
         .map { case Row(features: DenseVector, label: Double) =>
         val prediction =
-          features(0) * model.weights(0) + features(1) * model.weights(1) + model.intercept
+          features(0) * model.coefficients(0) + features(1) * model.coefficients(1) +
+            model.intercept
         label - prediction
       }
         .zip(model.summary.residuals.map(_.getDouble(0)))
@@ -663,9 +673,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model1a1 = trainer1a.fit(weightedData)
       val model1b = trainer1b.fit(weightedData)
 
-      assert(model1a0.weights !~= model1a1.weights absTol 1E-3)
+      assert(model1a0.coefficients !~= model1a1.coefficients absTol 1E-3)
       assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
-      assert(model1a0.weights ~== model1b.weights absTol 1E-3)
+      assert(model1a0.coefficients ~== model1b.coefficients absTol 1E-3)
       assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
 
       val trainer2a = (new LinearRegression).setFitIntercept(true)
@@ -675,9 +685,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model2a0 = trainer2a.fit(data)
       val model2a1 = trainer2a.fit(weightedData)
       val model2b = trainer2b.fit(weightedData)
-      assert(model2a0.weights !~= model2a1.weights absTol 1E-3)
+      assert(model2a0.coefficients !~= model2a1.coefficients absTol 1E-3)
       assert(model2a0.intercept !~= model2a1.intercept absTol 1E-3)
-      assert(model2a0.weights ~== model2b.weights absTol 1E-3)
+      assert(model2a0.coefficients ~== model2b.coefficients absTol 1E-3)
       assert(model2a0.intercept ~== model2b.intercept absTol 1E-3)
 
       val trainer3a = (new LinearRegression).setFitIntercept(false)
@@ -687,8 +697,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model3a0 = trainer3a.fit(data)
       val model3a1 = trainer3a.fit(weightedData)
       val model3b = trainer3b.fit(weightedData)
-      assert(model3a0.weights !~= model3a1.weights absTol 1E-3)
-      assert(model3a0.weights ~== model3b.weights absTol 1E-3)
+      assert(model3a0.coefficients !~= model3a1.coefficients absTol 1E-3)
+      assert(model3a0.coefficients ~== model3b.coefficients absTol 1E-3)
 
       val trainer4a = (new LinearRegression).setFitIntercept(false)
         .setElasticNetParam(0.0).setRegParam(0.21).setStandardization(false).setSolver(solver)
@@ -697,8 +707,8 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
       val model4a0 = trainer4a.fit(data)
       val model4a1 = trainer4a.fit(weightedData)
       val model4b = trainer4b.fit(weightedData)
-      assert(model4a0.weights !~= model4a1.weights absTol 1E-3)
-      assert(model4a0.weights ~== model4b.weights absTol 1E-3)
+      assert(model4a0.coefficients !~= model4a1.coefficients absTol 1E-3)
+      assert(model4a0.coefficients ~== model4b.coefficients absTol 1E-3)
     }
   }
 
diff --git a/python/pyspark/ml/classification.py b/python/pyspark/ml/classification.py
index 4cbe7fbd482d..2e468f67b898 100644
--- a/python/pyspark/ml/classification.py
+++ b/python/pyspark/ml/classification.py
@@ -15,6 +15,9 @@
 # limitations under the License.
 #
 
+import warnings
+
+from pyspark import since
 from pyspark.ml.util import keyword_only
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
 from pyspark.ml.param.shared import *
@@ -189,8 +192,18 @@ def weights(self):
         """
         Model weights.
         """
+
+        warnings.warn("weights is deprecated. Use coefficients instead.")
         return self._call_java("weights")
 
+    @property
+    @since("1.6.0")
+    def coefficients(self):
+        """
+        Model coefficients.
+        """
+        return self._call_java("coefficients")
+
     @property
     def intercept(self):
         """
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index dc68815556d4..ab26616f4a01 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -15,6 +15,8 @@
 # limitations under the License.
 #
 
+import warnings
+
 from pyspark import since
 from pyspark.ml.util import keyword_only
 from pyspark.ml.wrapper import JavaEstimator, JavaModel
@@ -117,8 +119,18 @@ def weights(self):
         """
         Model weights.
         """
+
+        warnings.warn("weights is deprecated. Use coefficients instead.")
         return self._call_java("weights")
 
+    @property
+    @since("1.6.0")
+    def coefficients(self):
+        """
+        Model coefficients.
+        """
+        return self._call_java("coefficients")
+
     @property
     @since("1.4.0")
     def intercept(self):

From 476f4348e2ea57ea05f4b470abfe76d97eeb20ce Mon Sep 17 00:00:00 2001
From: Calvin Jia <jia.calvin@gmail.com>
Date: Mon, 2 Nov 2015 17:02:31 -0800
Subject: [PATCH 452/896] [SPARK-11236] [TEST-MAVEN] [TEST-HADOOP1.0] [CORE]
 Update Tachyon dependency 0.7.1 -> 0.8.1

This is a reopening of #9204 which failed hadoop1 sbt tests.

With the original PR, a classpath issue would occur due to the MIMA plugin pulling in hadoop-2.2 dependencies regardless of the hadoop version when building the `oldDeps` project. These affect the hadoop1 sbt build because they are placed in `lib_managed` and Tachyon 0.8.0's default hadoop version is 2.2.

Author: Calvin Jia <jia.calvin@gmail.com>

Closes #9395 from calvinjia/spark-11236.
---
 core/pom.xml         | 6 +-----
 make-distribution.sh | 8 ++++----
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/core/pom.xml b/core/pom.xml
index 1b6b13517bd5..570a25cf325a 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -262,7 +262,7 @@
     <dependency>
       <groupId>org.tachyonproject</groupId>
       <artifactId>tachyon-client</artifactId>
-      <version>0.7.1</version>
+      <version>0.8.1</version>
       <exclusions>
         <exclusion>
           <groupId>org.apache.hadoop</groupId>
@@ -284,10 +284,6 @@
           <groupId>org.tachyonproject</groupId>
           <artifactId>tachyon-underfs-glusterfs</artifactId>
         </exclusion>
-        <exclusion>
-          <groupId>org.tachyonproject</groupId>
-          <artifactId>tachyon-underfs-s3</artifactId>
-        </exclusion>
       </exclusions>
     </dependency>
     <dependency>
diff --git a/make-distribution.sh b/make-distribution.sh
index 24418ace2627..e1c2afdbc6d8 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -33,9 +33,9 @@ SPARK_HOME="$(cd "`dirname "$0"`"; pwd)"
 DISTDIR="$SPARK_HOME/dist"
 
 SPARK_TACHYON=false
-TACHYON_VERSION="0.7.1"
+TACHYON_VERSION="0.8.1"
 TACHYON_TGZ="tachyon-${TACHYON_VERSION}-bin.tar.gz"
-TACHYON_URL="https://github.com/amplab/tachyon/releases/download/v${TACHYON_VERSION}/${TACHYON_TGZ}"
+TACHYON_URL="http://tachyon-project.org/downloads/files/${TACHYON_VERSION}/${TACHYON_TGZ}"
 
 MAKE_TGZ=false
 NAME=none
@@ -240,10 +240,10 @@ if [ "$SPARK_TACHYON" == "true" ]; then
   fi
 
   tar xzf "${TACHYON_TGZ}"
-  cp "tachyon-${TACHYON_VERSION}/core/target/tachyon-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
+  cp "tachyon-${TACHYON_VERSION}/assembly/target/tachyon-assemblies-${TACHYON_VERSION}-jar-with-dependencies.jar" "$DISTDIR/lib"
   mkdir -p "$DISTDIR/tachyon/src/main/java/tachyon/web"
   cp -r "tachyon-${TACHYON_VERSION}"/{bin,conf,libexec} "$DISTDIR/tachyon"
-  cp -r "tachyon-${TACHYON_VERSION}"/core/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
+  cp -r "tachyon-${TACHYON_VERSION}"/servers/src/main/java/tachyon/web "$DISTDIR/tachyon/src/main/java/tachyon/web"
 
   if [[ `uname -a` == Darwin* ]]; then
     # need to run sed differently on osx

From 21ad846238a9a79564e2e99a1def89fd31a0870d Mon Sep 17 00:00:00 2001
From: DB Tsai <dbt@netflix.com>
Date: Mon, 2 Nov 2015 19:07:31 -0800
Subject: [PATCH 453/896] [MINOR][ML] removed the old `getModelWeights`
 function

Removed the old `getModelWeights` function which was private and renamed into `getModelCoefficients`

Author: DB Tsai <dbt@netflix.com>

Closes #9426 from dbtsai/feature-minor.
---
 .../scala/org/apache/spark/ml/r/SparkRWrappers.scala   | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index 9162ec0e4e15..24f76de806d8 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -51,16 +51,6 @@ private[r] object SparkRWrappers {
     pipeline.fit(df)
   }
 
-  @deprecated("Use getModelCoefficients instead.", "1.6.0")
-  def getModelWeights(model: PipelineModel): Array[Double] = {
-    model.stages.last match {
-      case m: LinearRegressionModel =>
-        Array(m.intercept) ++ m.weights.toArray
-      case m: LogisticRegressionModel =>
-        Array(m.intercept) ++ m.weights.toArray
-    }
-  }
-
   def getModelCoefficients(model: PipelineModel): Array[Double] = {
     model.stages.last match {
       case m: LinearRegressionModel =>

From 2cef1bb0b560a03aa7308f694b0c66347b90c9ea Mon Sep 17 00:00:00 2001
From: Nong Li <nongli@gmail.com>
Date: Mon, 2 Nov 2015 19:18:45 -0800
Subject: [PATCH 454/896] =?UTF-8?q?[SPARK-5354][SQL]=20Cached=20tables=20s?=
 =?UTF-8?q?hould=20preserve=20partitioning=20and=20ord=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…ering.

For cached tables, we can just maintain the partitioning and ordering from the
source relation.

Author: Nong Li <nongli@gmail.com>

Closes #9404 from nongli/spark-5354.
---
 .../columnar/InMemoryColumnarTableScan.scala  |  7 +++
 .../apache/spark/sql/execution/Exchange.scala | 40 ++++++++++---
 .../apache/spark/sql/CachedTableSuite.scala   | 59 +++++++++++++++++++
 3 files changed, 97 insertions(+), 9 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index b4607b12fcef..7eb1ad7cd819 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -25,6 +25,7 @@ import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, Statistics}
+import org.apache.spark.sql.catalyst.plans.physical.Partitioning
 import org.apache.spark.sql.execution.{ConvertToUnsafe, LeafNode, SparkPlan}
 import org.apache.spark.sql.types.UserDefinedType
 import org.apache.spark.storage.StorageLevel
@@ -209,6 +210,12 @@ private[sql] case class InMemoryColumnarTableScan(
 
   override def output: Seq[Attribute] = attributes
 
+  // The cached version does not change the outputPartitioning of the original SparkPlan.
+  override def outputPartitioning: Partitioning = relation.child.outputPartitioning
+
+  // The cached version does not change the outputOrdering of the original SparkPlan.
+  override def outputOrdering: Seq[SortOrder] = relation.child.outputOrdering
+
   override def outputsUnsafeRows: Boolean = true
 
   private def statsFor(a: Attribute) = relation.partitionStatistics.forAttribute(a)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 7f60c8f5eaa9..e81108b7884d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -194,12 +194,13 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
  */
 private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[SparkPlan] {
   // TODO: Determine the number of partitions.
-  private def numPartitions: Int = sqlContext.conf.numShufflePartitions
+  private def defaultPartitions: Int = sqlContext.conf.numShufflePartitions
 
   /**
    * Given a required distribution, returns a partitioning that satisfies that distribution.
    */
-  private def canonicalPartitioning(requiredDistribution: Distribution): Partitioning = {
+  private def createPartitioning(requiredDistribution: Distribution,
+      numPartitions: Int): Partitioning = {
     requiredDistribution match {
       case AllTuples => SinglePartition
       case ClusteredDistribution(clustering) => HashPartitioning(clustering, numPartitions)
@@ -220,7 +221,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       if (child.outputPartitioning.satisfies(distribution)) {
         child
       } else {
-        Exchange(canonicalPartitioning(distribution), child)
+        Exchange(createPartitioning(distribution, defaultPartitions), child)
       }
     }
 
@@ -229,12 +230,33 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
     if (children.length > 1
         && requiredChildDistributions.toSet != Set(UnspecifiedDistribution)
         && !Partitioning.allCompatible(children.map(_.outputPartitioning))) {
-      children = children.zip(requiredChildDistributions).map { case (child, distribution) =>
-        val targetPartitioning = canonicalPartitioning(distribution)
-        if (child.outputPartitioning.guarantees(targetPartitioning)) {
-          child
-        } else {
-          Exchange(targetPartitioning, child)
+
+      // First check if the existing partitions of the children all match. This means they are
+      // partitioned by the same partitioning into the same number of partitions. In that case,
+      // don't try to make them match `defaultPartitions`, just use the existing partitioning.
+      // TODO: this should be a cost based descision. For example, a big relation should probably
+      // maintain its existing number of partitions and smaller partitions should be shuffled.
+      // defaultPartitions is arbitrary.
+      val numPartitions = children.head.outputPartitioning.numPartitions
+      val useExistingPartitioning = children.zip(requiredChildDistributions).forall {
+        case (child, distribution) => {
+          child.outputPartitioning.guarantees(
+            createPartitioning(distribution, numPartitions))
+        }
+      }
+
+      children = if (useExistingPartitioning) {
+        children
+      } else {
+        children.zip(requiredChildDistributions).map {
+          case (child, distribution) => {
+            val targetPartitioning = createPartitioning(distribution, defaultPartitions)
+            if (child.outputPartitioning.guarantees(targetPartitioning)) {
+              child
+            } else {
+              Exchange(targetPartitioning, child)
+            }
+          }
         }
       }
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
index fd566c8276bc..605954b105d1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql
 
 import org.apache.spark.sql.catalyst.analysis.NoSuchTableException
+import org.apache.spark.sql.execution.Exchange
 import org.apache.spark.sql.execution.PhysicalRDD
 
 import scala.concurrent.duration._
@@ -353,4 +354,62 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
     assert(sparkPlan.collect { case e: InMemoryColumnarTableScan => e }.size === 3)
     assert(sparkPlan.collect { case e: PhysicalRDD => e }.size === 0)
   }
+
+  /**
+   * Verifies that the plan for `df` contains `expected` number of Exchange operators.
+   */
+  private def verifyNumExchanges(df: DataFrame, expected: Int): Unit = {
+    assert(df.queryExecution.executedPlan.collect { case e: Exchange => e }.size == expected)
+  }
+
+  test("A cached table preserves the partitioning and ordering of its cached SparkPlan") {
+    val table3x = testData.unionAll(testData).unionAll(testData)
+    table3x.registerTempTable("testData3x")
+
+    sql("SELECT key, value FROM testData3x ORDER BY key").registerTempTable("orderedTable")
+    sqlContext.cacheTable("orderedTable")
+    assertCached(sqlContext.table("orderedTable"))
+    // Should not have an exchange as the query is already sorted on the group by key.
+    verifyNumExchanges(sql("SELECT key, count(*) FROM orderedTable GROUP BY key"), 0)
+    checkAnswer(
+      sql("SELECT key, count(*) FROM orderedTable GROUP BY key ORDER BY key"),
+      sql("SELECT key, count(*) FROM testData3x GROUP BY key ORDER BY key").collect())
+    sqlContext.uncacheTable("orderedTable")
+
+    // Set up two tables distributed in the same way. Try this with the data distributed into
+    // different number of partitions.
+    for (numPartitions <- 1 until 10 by 4) {
+      testData.distributeBy(Column("key") :: Nil, numPartitions).registerTempTable("t1")
+      testData2.distributeBy(Column("a") :: Nil, numPartitions).registerTempTable("t2")
+      sqlContext.cacheTable("t1")
+      sqlContext.cacheTable("t2")
+
+      // Joining them should result in no exchanges.
+      verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 0)
+      checkAnswer(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"),
+        sql("SELECT * FROM testData t1 JOIN testData2 t2 ON t1.key = t2.a"))
+
+      // Grouping on the partition key should result in no exchanges
+      verifyNumExchanges(sql("SELECT count(*) FROM t1 GROUP BY key"), 0)
+      checkAnswer(sql("SELECT count(*) FROM t1 GROUP BY key"),
+        sql("SELECT count(*) FROM testData GROUP BY key"))
+
+      sqlContext.uncacheTable("t1")
+      sqlContext.uncacheTable("t2")
+      sqlContext.dropTempTable("t1")
+      sqlContext.dropTempTable("t2")
+    }
+
+    // Distribute the tables into non-matching number of partitions. Need to shuffle.
+    testData.distributeBy(Column("key") :: Nil, 6).registerTempTable("t1")
+    testData2.distributeBy(Column("a") :: Nil, 3).registerTempTable("t2")
+    sqlContext.cacheTable("t1")
+    sqlContext.cacheTable("t2")
+
+    verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 2)
+    sqlContext.uncacheTable("t1")
+    sqlContext.uncacheTable("t2")
+    sqlContext.dropTempTable("t1")
+    sqlContext.dropTempTable("t2")
+  }
 }

From 9cb5c731dadff9539126362827a258d6b65754bb Mon Sep 17 00:00:00 2001
From: Nong Li <nongli@gmail.com>
Date: Mon, 2 Nov 2015 20:32:08 -0800
Subject: [PATCH 455/896] [SPARK-11329][SQL] Support star expansion for
 structs.

1. Supporting expanding structs in Projections. i.e.
  "SELECT s.*" where s is a struct type.
  This is fixed by allowing the expand function to handle structs in addition to tables.

2. Supporting expanding * inside aggregate functions of structs.
   "SELECT max(struct(col1, structCol.*))"
   This requires recursively expanding the expressions. In this case, it it the aggregate
   expression "max(...)" and we need to recursively expand its children inputs.

Author: Nong Li <nongli@gmail.com>

Closes #9343 from nongli/spark-11329.
---
 .../apache/spark/sql/catalyst/SqlParser.scala |   6 +-
 .../sql/catalyst/analysis/Analyzer.scala      |  46 ++++--
 .../sql/catalyst/analysis/unresolved.scala    |  78 +++++++---
 .../scala/org/apache/spark/sql/Column.scala   |   3 +-
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 133 ++++++++++++++++++
 .../org/apache/spark/sql/hive/HiveQl.scala    |   2 +-
 6 files changed, 230 insertions(+), 38 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 0fef04302714..d7567e8613e3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -466,9 +466,9 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
 
   protected lazy val baseExpression: Parser[Expression] =
     ( "*" ^^^ UnresolvedStar(None)
-    | ident <~ "." ~ "*" ^^ { case tableName => UnresolvedStar(Option(tableName)) }
-    | primary
-    )
+    | (ident <~ "."). + <~ "*" ^^ { case target => { UnresolvedStar(Option(target)) }
+    } | primary
+   )
 
   protected lazy val signedPrimary: Parser[Expression] =
     sign ~ primary ^^ { case s ~ e => if (s == "-") UnaryMinus(e) else e }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index beabacfc88e3..912c967b95f0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -279,6 +279,24 @@ class Analyzer(
    * a logical plan node's children.
    */
   object ResolveReferences extends Rule[LogicalPlan] {
+    /**
+     * Foreach expression, expands the matching attribute.*'s in `child`'s input for the subtree
+     * rooted at each expression.
+     */
+    def expandStarExpressions(exprs: Seq[Expression], child: LogicalPlan): Seq[Expression] = {
+      exprs.flatMap {
+        case s: Star => s.expand(child, resolver)
+        case e =>
+          e.transformDown {
+            case f1: UnresolvedFunction if containsStar(f1.children) =>
+              f1.copy(children = f1.children.flatMap {
+                case s: Star => s.expand(child, resolver)
+                case o => o :: Nil
+              })
+          } :: Nil
+      }
+    }
+
     def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
       case p: LogicalPlan if !p.childrenResolved => p
 
@@ -286,44 +304,42 @@ class Analyzer(
       case p @ Project(projectList, child) if containsStar(projectList) =>
         Project(
           projectList.flatMap {
-            case s: Star => s.expand(child.output, resolver)
+            case s: Star => s.expand(child, resolver)
             case UnresolvedAlias(f @ UnresolvedFunction(_, args, _)) if containsStar(args) =>
-              val expandedArgs = args.flatMap {
-                case s: Star => s.expand(child.output, resolver)
-                case o => o :: Nil
-              }
-              UnresolvedAlias(child = f.copy(children = expandedArgs)) :: Nil
+              val newChildren = expandStarExpressions(args, child)
+              UnresolvedAlias(child = f.copy(children = newChildren)) :: Nil
+            case Alias(f @ UnresolvedFunction(_, args, _), name) if containsStar(args) =>
+              val newChildren = expandStarExpressions(args, child)
+              Alias(child = f.copy(children = newChildren), name)() :: Nil
             case UnresolvedAlias(c @ CreateArray(args)) if containsStar(args) =>
               val expandedArgs = args.flatMap {
-                case s: Star => s.expand(child.output, resolver)
+                case s: Star => s.expand(child, resolver)
                 case o => o :: Nil
               }
               UnresolvedAlias(c.copy(children = expandedArgs)) :: Nil
             case UnresolvedAlias(c @ CreateStruct(args)) if containsStar(args) =>
               val expandedArgs = args.flatMap {
-                case s: Star => s.expand(child.output, resolver)
+                case s: Star => s.expand(child, resolver)
                 case o => o :: Nil
               }
               UnresolvedAlias(c.copy(children = expandedArgs)) :: Nil
             case o => o :: Nil
           },
           child)
+
       case t: ScriptTransformation if containsStar(t.input) =>
         t.copy(
           input = t.input.flatMap {
-            case s: Star => s.expand(t.child.output, resolver)
+            case s: Star => s.expand(t.child, resolver)
             case o => o :: Nil
           }
         )
 
       // If the aggregate function argument contains Stars, expand it.
       case a: Aggregate if containsStar(a.aggregateExpressions) =>
-        a.copy(
-          aggregateExpressions = a.aggregateExpressions.flatMap {
-            case s: Star => s.expand(a.child.output, resolver)
-            case o => o :: Nil
-          }
-        )
+        val expanded = expandStarExpressions(a.aggregateExpressions, a.child)
+            .map(_.asInstanceOf[NamedExpression])
+        a.copy(aggregateExpressions = expanded)
 
       // Special handling for cases when self-join introduce duplicate expression ids.
       case j @ Join(left, right, _, _) if !j.selfJoinResolved =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
index c97365003935..6975662e2b73 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
@@ -18,12 +18,12 @@
 package org.apache.spark.sql.catalyst.analysis
 
 import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
-import org.apache.spark.sql.catalyst.{TableIdentifier, errors}
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans.logical.LeafNode
+import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
+import org.apache.spark.sql.catalyst.plans.logical.{LogicalPlan, LeafNode}
 import org.apache.spark.sql.catalyst.trees.TreeNode
-import org.apache.spark.sql.types.DataType
+import org.apache.spark.sql.catalyst.{TableIdentifier, errors}
+import org.apache.spark.sql.types.{DataType, StructType}
 
 /**
  * Thrown when an invalid attempt is made to access a property of a tree that has yet to be fully
@@ -158,7 +158,7 @@ abstract class Star extends LeafExpression with NamedExpression {
   override def toAttribute: Attribute = throw new UnresolvedException(this, "toAttribute")
   override lazy val resolved = false
 
-  def expand(input: Seq[Attribute], resolver: Resolver): Seq[NamedExpression]
+  def expand(input: LogicalPlan, resolver: Resolver): Seq[NamedExpression]
 }
 
 
@@ -166,26 +166,68 @@ abstract class Star extends LeafExpression with NamedExpression {
  * Represents all of the input attributes to a given relational operator, for example in
  * "SELECT * FROM ...".
  *
- * @param table an optional table that should be the target of the expansion.  If omitted all
- *              tables' columns are produced.
+ * This is also used to expand structs. For example:
+ * "SELECT record.* from (SELECT struct(a,b,c) as record ...)
+ *
+ * @param target an optional name that should be the target of the expansion.  If omitted all
+ *              targets' columns are produced. This can either be a table name or struct name. This
+ *              is a list of identifiers that is the path of the expansion.
  */
-case class UnresolvedStar(table: Option[String]) extends Star with Unevaluable {
+case class UnresolvedStar(target: Option[Seq[String]]) extends Star with Unevaluable {
+
+  override def expand(input: LogicalPlan, resolver: Resolver): Seq[NamedExpression] = {
 
-  override def expand(input: Seq[Attribute], resolver: Resolver): Seq[NamedExpression] = {
-    val expandedAttributes: Seq[Attribute] = table match {
+    // First try to expand assuming it is table.*.
+    val expandedAttributes: Seq[Attribute] = target match {
       // If there is no table specified, use all input attributes.
-      case None => input
+      case None => input.output
       // If there is a table, pick out attributes that are part of this table.
-      case Some(t) => input.filter(_.qualifiers.filter(resolver(_, t)).nonEmpty)
+      case Some(t) => if (t.size == 1) {
+        input.output.filter(_.qualifiers.filter(resolver(_, t.head)).nonEmpty)
+      } else {
+        List()
+      }
     }
-    expandedAttributes.zip(input).map {
-      case (n: NamedExpression, _) => n
-      case (e, originalAttribute) =>
-        Alias(e, originalAttribute.name)(qualifiers = originalAttribute.qualifiers)
+    if (!expandedAttributes.isEmpty) {
+      if (expandedAttributes.forall(_.isInstanceOf[NamedExpression])) {
+        return expandedAttributes
+      } else {
+        require(expandedAttributes.size == input.output.size)
+        expandedAttributes.zip(input.output).map {
+          case (e, originalAttribute) =>
+            Alias(e, originalAttribute.name)(qualifiers = originalAttribute.qualifiers)
+        }
+      }
+      return expandedAttributes
+    }
+
+    require(target.isDefined)
+
+    // Try to resolve it as a struct expansion. If there is a conflict and both are possible,
+    // (i.e. [name].* is both a table and a struct), the struct path can always be qualified.
+    val attribute = input.resolve(target.get, resolver)
+    if (attribute.isDefined) {
+      // This target resolved to an attribute in child. It must be a struct. Expand it.
+      attribute.get.dataType match {
+        case s: StructType => {
+          s.fields.map( f => {
+            val extract = GetStructField(attribute.get, f, s.getFieldIndex(f.name).get)
+            Alias(extract, target.get + "." + f.name)()
+          })
+        }
+        case _ => {
+          throw new AnalysisException("Can only star expand struct data types. Attribute: `" +
+            target.get + "`")
+        }
+      }
+    } else {
+      val from = input.inputSet.map(_.name).mkString(", ")
+      val targetString = target.get.mkString(".")
+      throw new AnalysisException(s"cannot resolve '$targetString.*' give input columns '$from'")
     }
   }
 
-  override def toString: String = table.map(_ + ".").getOrElse("") + "*"
+  override def toString: String = target.map(_ + ".").getOrElse("") + "*"
 }
 
 /**
@@ -225,7 +267,7 @@ case class MultiAlias(child: Expression, names: Seq[String])
  * @param expressions Expressions to expand.
  */
 case class ResolvedStar(expressions: Seq[NamedExpression]) extends Star with Unevaluable {
-  override def expand(input: Seq[Attribute], resolver: Resolver): Seq[NamedExpression] = expressions
+  override def expand(input: LogicalPlan, resolver: Resolver): Seq[NamedExpression] = expressions
   override def toString: String = expressions.mkString("ResolvedStar(", ", ", ")")
 }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index e4f4cf1533ac..3cde9d6cb470 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -60,7 +60,8 @@ class Column(protected[sql] val expr: Expression) extends Logging {
 
   def this(name: String) = this(name match {
     case "*" => UnresolvedStar(None)
-    case _ if name.endsWith(".*") => UnresolvedStar(Some(name.substring(0, name.length - 2)))
+    case _ if name.endsWith(".*") => UnresolvedStar(Some(UnresolvedAttribute.parseAttributeName(
+      name.substring(0, name.length - 2))))
     case _ => UnresolvedAttribute.quotedString(name)
   })
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 5413ef1287da..ee54bff24b19 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1932,4 +1932,137 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       assert(sampled.count() == sampledOdd.count() + sampledEven.count())
     }
   }
+
+  test("Struct Star Expansion") {
+    val structDf = testData2.select("a", "b").as("record")
+
+    checkAnswer(
+      structDf.select($"record.a", $"record.b"),
+      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+
+    checkAnswer(
+      structDf.select($"record.*"),
+      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+
+    checkAnswer(
+      structDf.select($"record.*", $"record.*"),
+      Row(1, 1, 1, 1) :: Row(1, 2, 1, 2) :: Row(2, 1, 2, 1) :: Row(2, 2, 2, 2) ::
+        Row(3, 1, 3, 1) :: Row(3, 2, 3, 2) :: Nil)
+
+    checkAnswer(
+      sql("select struct(a, b) as r1, struct(b, a) as r2 from testData2").select($"r1.*", $"r2.*"),
+      Row(1, 1, 1, 1) :: Row(1, 2, 2, 1) :: Row(2, 1, 1, 2) :: Row(2, 2, 2, 2) ::
+        Row(3, 1, 1, 3) :: Row(3, 2, 2, 3) :: Nil)
+
+    // Try with a registered table.
+    sql("select struct(a, b) as record from testData2").registerTempTable("structTable")
+    checkAnswer(sql("SELECT record.* FROM structTable"),
+      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+
+    checkAnswer(sql(
+      """
+        | SELECT min(struct(record.*)) FROM
+        |   (select struct(a,b) as record from testData2) tmp
+      """.stripMargin),
+      Row(Row(1, 1)) :: Nil)
+
+    // Try with an alias on the select list
+    checkAnswer(sql(
+      """
+        | SELECT max(struct(record.*)) as r FROM
+        |   (select struct(a,b) as record from testData2) tmp
+      """.stripMargin).select($"r.*"),
+      Row(3, 2) :: Nil)
+
+    // With GROUP BY
+    checkAnswer(sql(
+      """
+        | SELECT min(struct(record.*)) FROM
+        |   (select a as a, struct(a,b) as record from testData2) tmp
+        | GROUP BY a
+      """.stripMargin),
+      Row(Row(1, 1)) :: Row(Row(2, 1)) :: Row(Row(3, 1)) :: Nil)
+
+    // With GROUP BY and alias
+    checkAnswer(sql(
+      """
+        | SELECT max(struct(record.*)) as r FROM
+        |   (select a as a, struct(a,b) as record from testData2) tmp
+        | GROUP BY a
+      """.stripMargin).select($"r.*"),
+      Row(1, 2) :: Row(2, 2) :: Row(3, 2) :: Nil)
+
+    // With GROUP BY and alias and additional fields in the struct
+    checkAnswer(sql(
+      """
+        | SELECT max(struct(a, record.*, b)) as r FROM
+        |   (select a as a, b as b, struct(a,b) as record from testData2) tmp
+        | GROUP BY a
+      """.stripMargin).select($"r.*"),
+      Row(1, 1, 2, 2) :: Row(2, 2, 2, 2) :: Row(3, 3, 2, 2) :: Nil)
+
+    // Create a data set that contains nested structs.
+    val nestedStructData = sql(
+      """
+        | SELECT struct(r1, r2) as record FROM
+        |   (SELECT struct(a, b) as r1, struct(b, a) as r2 FROM testData2) tmp
+      """.stripMargin)
+
+    checkAnswer(nestedStructData.select($"record.*"),
+      Row(Row(1, 1), Row(1, 1)) :: Row(Row(1, 2), Row(2, 1)) :: Row(Row(2, 1), Row(1, 2)) ::
+        Row(Row(2, 2), Row(2, 2)) :: Row(Row(3, 1), Row(1, 3)) :: Row(Row(3, 2), Row(2, 3)) :: Nil)
+    checkAnswer(nestedStructData.select($"record.r1"),
+      Row(Row(1, 1)) :: Row(Row(1, 2)) :: Row(Row(2, 1)) :: Row(Row(2, 2)) ::
+        Row(Row(3, 1)) :: Row(Row(3, 2)) :: Nil)
+    checkAnswer(
+      nestedStructData.select($"record.r1.*"),
+      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+
+    // Try with a registered table
+    nestedStructData.registerTempTable("nestedStructTable")
+    checkAnswer(sql("SELECT record.* FROM nestedStructTable"),
+      nestedStructData.select($"record.*"))
+    checkAnswer(sql("SELECT record.r1 FROM nestedStructTable"),
+      nestedStructData.select($"record.r1"))
+    checkAnswer(sql("SELECT record.r1.* FROM nestedStructTable"),
+      nestedStructData.select($"record.r1.*"))
+
+    // Create paths with unusual characters.
+    val specialCharacterPath = sql(
+      """
+        | SELECT struct(`col$.a_`, `a.b.c.`) as `r&&b.c` FROM
+        |   (SELECT struct(a, b) as `col$.a_`, struct(b, a) as `a.b.c.` FROM testData2) tmp
+      """.stripMargin)
+    specialCharacterPath.registerTempTable("specialCharacterTable")
+    checkAnswer(specialCharacterPath.select($"`r&&b.c`.*"),
+      nestedStructData.select($"record.*"))
+    checkAnswer(sql("SELECT `r&&b.c`.`col$.a_` FROM specialCharacterTable"),
+      nestedStructData.select($"record.r1"))
+    checkAnswer(sql("SELECT `r&&b.c`.`a.b.c.` FROM specialCharacterTable"),
+      nestedStructData.select($"record.r2"))
+    checkAnswer(sql("SELECT `r&&b.c`.`col$.a_`.* FROM specialCharacterTable"),
+      nestedStructData.select($"record.r1.*"))
+
+    // Try star expanding a scalar. This should fail.
+    assert(intercept[AnalysisException](sql("select a.* from testData2")).getMessage.contains(
+      "Can only star expand struct data types."))
+
+    // Try resolving something not there.
+    assert(intercept[AnalysisException](sql("SELECT abc.* FROM nestedStructTable"))
+      .getMessage.contains("cannot resolve"))
+  }
+
+
+  test("Struct Star Expansion - Name conflict") {
+    // Create a data set that contains a naming conflict
+    val nameConflict = sql("SELECT struct(a, b) as nameConflict, a as a FROM testData2")
+    nameConflict.registerTempTable("nameConflict")
+    // Unqualified should resolve to table.
+    checkAnswer(sql("SELECT nameConflict.* FROM nameConflict"),
+      Row(Row(1, 1), 1) :: Row(Row(1, 2), 1) :: Row(Row(2, 1), 2) :: Row(Row(2, 2), 2) ::
+        Row(Row(3, 1), 3) :: Row(Row(3, 2), 3) :: Nil)
+    // Qualify the struct type with the table name.
+    checkAnswer(sql("SELECT nameConflict.nameConflict.* FROM nameConflict"),
+      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+  }
 }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 3697761f20c2..ab88c1e68fd7 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -1505,7 +1505,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
     // The format of dbName.tableName.* cannot be parsed by HiveParser. TOK_TABNAME will only
     // has a single child which is tableName.
     case Token("TOK_ALLCOLREF", Token("TOK_TABNAME", Token(name, Nil) :: Nil) :: Nil) =>
-      UnresolvedStar(Some(name))
+      UnresolvedStar(Some(UnresolvedAttribute.parseAttributeName(name)))
 
     /* Aggregate Functions */
     case Token("TOK_FUNCTIONSTAR", Token(COUNT(), Nil) :: Nil) => Count(Literal(1))

From efaa4721b511a1d29229facde6457a6dcda18966 Mon Sep 17 00:00:00 2001
From: Yves Raimond <yraimond@netflix.com>
Date: Mon, 2 Nov 2015 20:35:59 -0800
Subject: [PATCH 456/896] [SPARK-11432][GRAPHX] Personalized PageRank shouldn't
 use uniform initialization

Changes the personalized pagerank initialization to be non-uniform.

Author: Yves Raimond <yraimond@netflix.com>

Closes #9386 from moustaki/personalized-pagerank-init.
---
 .../apache/spark/graphx/lib/PageRank.scala    | 29 ++++++++++++-------
 .../spark/graphx/lib/PageRankSuite.scala      | 13 ++++++---
 2 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala b/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
index 8c0a461e99fa..52b237fc1509 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
@@ -104,18 +104,23 @@ object PageRank extends Logging {
       graph: Graph[VD, ED], numIter: Int, resetProb: Double = 0.15,
       srcId: Option[VertexId] = None): Graph[Double, Double] =
   {
+    val personalized = srcId isDefined
+    val src: VertexId = srcId.getOrElse(-1L)
+
     // Initialize the PageRank graph with each edge attribute having
-    // weight 1/outDegree and each vertex with attribute 1.0.
+    // weight 1/outDegree and each vertex with attribute resetProb.
+    // When running personalized pagerank, only the source vertex
+    // has an attribute resetProb. All others are set to 0.
     var rankGraph: Graph[Double, Double] = graph
       // Associate the degree with each vertex
       .outerJoinVertices(graph.outDegrees) { (vid, vdata, deg) => deg.getOrElse(0) }
       // Set the weight on the edges based on the degree
       .mapTriplets( e => 1.0 / e.srcAttr, TripletFields.Src )
       // Set the vertex attributes to the initial pagerank values
-      .mapVertices( (id, attr) => resetProb )
+      .mapVertices { (id, attr) =>
+        if (!(id != src && personalized)) resetProb else 0.0
+      }
 
-    val personalized = srcId isDefined
-    val src: VertexId = srcId.getOrElse(-1L)
     def delta(u: VertexId, v: VertexId): Double = { if (u == v) 1.0 else 0.0 }
 
     var iteration = 0
@@ -192,6 +197,9 @@ object PageRank extends Logging {
       graph: Graph[VD, ED], tol: Double, resetProb: Double = 0.15,
       srcId: Option[VertexId] = None): Graph[Double, Double] =
   {
+    val personalized = srcId.isDefined
+    val src: VertexId = srcId.getOrElse(-1L)
+
     // Initialize the pagerankGraph with each edge attribute
     // having weight 1/outDegree and each vertex with attribute 1.0.
     val pagerankGraph: Graph[(Double, Double), Double] = graph
@@ -202,13 +210,11 @@ object PageRank extends Logging {
       // Set the weight on the edges based on the degree
       .mapTriplets( e => 1.0 / e.srcAttr )
       // Set the vertex attributes to (initalPR, delta = 0)
-      .mapVertices( (id, attr) => (0.0, 0.0) )
+      .mapVertices { (id, attr) =>
+        if (id == src) (resetProb, Double.NegativeInfinity) else (0.0, 0.0)
+      }
       .cache()
 
-    val personalized = srcId.isDefined
-    val src: VertexId = srcId.getOrElse(-1L)
-
-
     // Define the three functions needed to implement PageRank in the GraphX
     // version of Pregel
     def vertexProgram(id: VertexId, attr: (Double, Double), msgSum: Double): (Double, Double) = {
@@ -225,7 +231,8 @@ object PageRank extends Logging {
       teleport = oldPR*delta
 
       val newPR = teleport + (1.0 - resetProb) * msgSum
-      (newPR, newPR - oldPR)
+      val newDelta = if (lastDelta == Double.NegativeInfinity) newPR else newPR - oldPR
+      (newPR, newDelta)
     }
 
     def sendMessage(edge: EdgeTriplet[(Double, Double), Double]) = {
@@ -239,7 +246,7 @@ object PageRank extends Logging {
     def messageCombiner(a: Double, b: Double): Double = a + b
 
     // The initial message received by all vertices in PageRank
-    val initialMessage = resetProb / (1.0 - resetProb)
+    val initialMessage = if (personalized) 0.0 else resetProb / (1.0 - resetProb)
 
     // Execute a dynamic version of Pregel.
     val vp = if (personalized) {
diff --git a/graphx/src/test/scala/org/apache/spark/graphx/lib/PageRankSuite.scala b/graphx/src/test/scala/org/apache/spark/graphx/lib/PageRankSuite.scala
index 45f1e3011035..bdff31446f8e 100644
--- a/graphx/src/test/scala/org/apache/spark/graphx/lib/PageRankSuite.scala
+++ b/graphx/src/test/scala/org/apache/spark/graphx/lib/PageRankSuite.scala
@@ -109,17 +109,22 @@ class PageRankSuite extends SparkFunSuite with LocalSparkContext {
       assert(notMatching === 0)
 
       val staticErrors = staticRanks2.map { case (vid, pr) =>
-        val correct = (vid > 0 && pr == resetProb) ||
-          (vid == 0 && math.abs(pr - (resetProb + (1.0 - resetProb) * (resetProb *
-            (nVertices - 1)) )) < 1.0E-5)
+        val correct = (vid > 0 && pr == 0.0) ||
+          (vid == 0 && pr == resetProb)
         if (!correct) 1 else 0
       }
       assert(staticErrors.sum === 0)
 
       val dynamicRanks = starGraph.personalizedPageRank(0, 0, resetProb).vertices.cache()
       assert(compareRanks(staticRanks2, dynamicRanks) < errorTol)
+
+      // We have one outbound edge from 1 to 0
+      val otherStaticRanks2 = starGraph.staticPersonalizedPageRank(1, numIter = 2, resetProb)
+        .vertices.cache()
+      val otherDynamicRanks = starGraph.personalizedPageRank(1, 0, resetProb).vertices.cache()
+      assert(compareRanks(otherDynamicRanks, otherStaticRanks2) < errorTol)
     }
-  } // end of test Star PageRank
+  } // end of test Star PersonalPageRank
 
   test("Grid PageRank") {
     withSpark { sc =>

From 9cf56c96b7d02a14175d40b336da14c2e1c88339 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Mon, 2 Nov 2015 21:18:38 -0800
Subject: [PATCH 457/896] [SPARK-11469][SQL] Allow users to define
 nondeterministic udfs.

This is the first task (https://issues.apache.org/jira/browse/SPARK-11469) of https://issues.apache.org/jira/browse/SPARK-11438

Author: Yin Huai <yhuai@databricks.com>

Closes #9393 from yhuai/udfNondeterministic.
---
 project/MimaExcludes.scala                    |  47 +++++
 .../sql/catalyst/expressions/ScalaUDF.scala   |   7 +-
 .../apache/spark/sql/UDFRegistration.scala    | 164 ++++++++++--------
 .../spark/sql/UserDefinedFunction.scala       |  13 +-
 .../scala/org/apache/spark/sql/UDFSuite.scala | 105 +++++++++++
 .../datasources/parquet/ParquetIOSuite.scala  |   4 +-
 6 files changed, 262 insertions(+), 78 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 8282f7ea6240..ec0e44b7f2d6 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -112,6 +112,53 @@ object MimaExcludes {
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD"),
         ProblemFilters.exclude[MissingClassProblem](
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$")
+      ) ++ Seq(
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$2"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$3"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$4"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$5"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$6"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$7"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$8"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$9"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$10"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$11"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$12"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$13"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$14"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$15"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$16"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$17"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$18"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$19"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$20"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$21"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$22"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$23"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$24")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
index 11c7950c0613..a04af7f1dd87 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
@@ -30,13 +30,18 @@ case class ScalaUDF(
     function: AnyRef,
     dataType: DataType,
     children: Seq[Expression],
-    inputTypes: Seq[DataType] = Nil)
+    inputTypes: Seq[DataType] = Nil,
+    isDeterministic: Boolean = true)
   extends Expression with ImplicitCastInputTypes with CodegenFallback {
 
   override def nullable: Boolean = true
 
   override def toString: String = s"UDF(${children.mkString(",")})"
 
+  override def foldable: Boolean = deterministic && children.forall(_.foldable)
+
+  override def deterministic: Boolean = isDeterministic && children.forall(_.deterministic)
+
   // scalastyle:off
 
   /** This method has been generated by this script
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
index fc4d0938c533..f5b95e13e47b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
@@ -58,8 +58,10 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
    * Register a user-defined aggregate function (UDAF).
    *
    * @param name the name of the UDAF.
-   * @param udaf the UDAF needs to be registered.
+   * @param udaf the UDAF that needs to be registered.
    * @return the registered UDAF.
+   *
+   * @since 1.5.0
    */
   def register(
       name: String,
@@ -69,6 +71,22 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     udaf
   }
 
+  /**
+   * Register a user-defined function (UDF).
+   *
+   * @param name the name of the UDF.
+   * @param udf the UDF that needs to be registered.
+   * @return the registered UDF.
+   *
+   * @since 1.6.0
+   */
+  def register(
+      name: String,
+      udf: UserDefinedFunction): UserDefinedFunction = {
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
+  }
+
   // scalastyle:off
 
   /* register 0-22 were generated by this script
@@ -86,9 +104,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
         def register[$typeTags](name: String, func: Function$x[$types]): UserDefinedFunction = {
           val dataType = ScalaReflection.schemaFor[RT].dataType
           val inputTypes = Try($inputTypes).getOrElse(Nil)
-          def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-          functionRegistry.registerFunction(name, builder)
-          UserDefinedFunction(func, dataType)
+          val udf = UserDefinedFunction(func, dataType, inputTypes)
+          functionRegistry.registerFunction(name, udf.builder)
+          udf
         }""")
     }
 
@@ -118,9 +136,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag](name: String, func: Function0[RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -131,9 +149,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag](name: String, func: Function1[A1, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -144,9 +162,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag](name: String, func: Function2[A1, A2, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -157,9 +175,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag](name: String, func: Function3[A1, A2, A3, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -170,9 +188,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag](name: String, func: Function4[A1, A2, A3, A4, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -183,9 +201,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag](name: String, func: Function5[A1, A2, A3, A4, A5, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -196,9 +214,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag](name: String, func: Function6[A1, A2, A3, A4, A5, A6, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -209,9 +227,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag](name: String, func: Function7[A1, A2, A3, A4, A5, A6, A7, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -222,9 +240,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag](name: String, func: Function8[A1, A2, A3, A4, A5, A6, A7, A8, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -235,9 +253,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag](name: String, func: Function9[A1, A2, A3, A4, A5, A6, A7, A8, A9, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -248,9 +266,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag](name: String, func: Function10[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -261,9 +279,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag](name: String, func: Function11[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -274,9 +292,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag](name: String, func: Function12[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -287,9 +305,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag](name: String, func: Function13[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -300,9 +318,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag](name: String, func: Function14[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -313,9 +331,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag](name: String, func: Function15[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -326,9 +344,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag](name: String, func: Function16[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -339,9 +357,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag](name: String, func: Function17[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -352,9 +370,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag](name: String, func: Function18[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -365,9 +383,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag](name: String, func: Function19[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -378,9 +396,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag](name: String, func: Function20[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -391,9 +409,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag](name: String, func: Function21[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   /**
@@ -404,9 +422,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag, A22: TypeTag](name: String, func: Function22[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: ScalaReflection.schemaFor[A22].dataType :: Nil).getOrElse(Nil)
-    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
-    functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    val udf = UserDefinedFunction(func, dataType, inputTypes)
+    functionRegistry.registerFunction(name, udf.builder)
+    udf
   }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala b/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
index 0f8cd280b5ac..1319391db537 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
@@ -44,11 +44,20 @@ import org.apache.spark.sql.types.DataType
 case class UserDefinedFunction protected[sql] (
     f: AnyRef,
     dataType: DataType,
-    inputTypes: Seq[DataType] = Nil) {
+    inputTypes: Seq[DataType] = Nil,
+    deterministic: Boolean = true) {
 
   def apply(exprs: Column*): Column = {
-    Column(ScalaUDF(f, dataType, exprs.map(_.expr), inputTypes))
+    Column(ScalaUDF(f, dataType, exprs.map(_.expr), inputTypes, deterministic))
   }
+
+  protected[sql] def builder: Seq[Expression] => ScalaUDF = {
+    (exprs: Seq[Expression]) =>
+      ScalaUDF(f, dataType, exprs, inputTypes, deterministic)
+  }
+
+  def nondeterministic: UserDefinedFunction =
+    UserDefinedFunction(f, dataType, inputTypes, deterministic = false)
 }
 
 /**
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
index e0435a0dba6a..6e510f0b8aff 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.sql.catalyst.expressions.ScalaUDF
+import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.test.SQLTestData._
 
@@ -191,4 +193,107 @@ class UDFSuite extends QueryTest with SharedSQLContext {
     // pass a decimal to intExpected.
     assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 1)
   }
+
+  private def checkNumUDFs(df: DataFrame, expectedNumUDFs: Int): Unit = {
+    val udfs = df.queryExecution.optimizedPlan.collect {
+      case p: logical.Project => p.projectList.flatMap {
+        case e => e.collect {
+          case udf: ScalaUDF => udf
+        }
+      }
+    }.flatten
+    assert(udfs.length === expectedNumUDFs)
+  }
+
+  test("foldable udf") {
+    import org.apache.spark.sql.functions._
+
+    val myUDF = udf((x: Int) => x + 1)
+
+    {
+      val df = sql("SELECT 1 as a")
+        .select(col("a"), myUDF(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
+      checkNumUDFs(df, 0)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+  }
+
+  test("nondeterministic udf: using UDFRegistration") {
+    import org.apache.spark.sql.functions._
+
+    val myUDF = sqlContext.udf.register("plusOne1", (x: Int) => x + 1)
+    sqlContext.udf.register("plusOne2", myUDF.nondeterministic)
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), myUDF(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
+      checkNumUDFs(df, 3)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), callUDF("plusOne1", col("a")).as("b"))
+        .select(col("a"), col("b"), callUDF("plusOne1", col("b")).as("c"))
+      checkNumUDFs(df, 3)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
+      checkNumUDFs(df, 2)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), callUDF("plusOne2", col("a")).as("b"))
+        .select(col("a"), col("b"), callUDF("plusOne2", col("b")).as("c"))
+      checkNumUDFs(df, 2)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+  }
+
+  test("nondeterministic udf: using udf function") {
+    import org.apache.spark.sql.functions._
+
+    val myUDF = udf((x: Int) => x + 1)
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), myUDF(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
+      checkNumUDFs(df, 3)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+
+    {
+      val df = sqlContext.range(1, 2).select(col("id").as("a"))
+        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
+      checkNumUDFs(df, 2)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+
+    {
+      // nondeterministicUDF will not be foldable.
+      val df = sql("SELECT 1 as a")
+        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
+        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
+      checkNumUDFs(df, 2)
+      checkAnswer(df, Row(1, 2, 3))
+    }
+  }
+
+  test("override a registered udf") {
+    sqlContext.udf.register("intExpected", (x: Int) => x)
+    assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 1)
+
+    sqlContext.udf.register("intExpected", (x: Int) => x + 1)
+    assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 2)
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 72744799897b..f14b2886a9ec 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -381,7 +381,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       sqlContext.udf.register("div0", (x: Int) => x / 0)
       withTempPath { dir =>
         intercept[org.apache.spark.SparkException] {
-          sqlContext.sql("select div0(1)").write.parquet(dir.getCanonicalPath)
+          sqlContext.range(1, 2).selectExpr("div0(id) as a").write.parquet(dir.getCanonicalPath)
         }
         val path = new Path(dir.getCanonicalPath, "_temporary")
         val fs = path.getFileSystem(hadoopConfiguration)
@@ -405,7 +405,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       sqlContext.udf.register("div0", (x: Int) => x / 0)
       withTempPath { dir =>
         intercept[org.apache.spark.SparkException] {
-          sqlContext.sql("select div0(1)").write.parquet(dir.getCanonicalPath)
+          sqlContext.range(1, 2).selectExpr("div0(id) as a").write.parquet(dir.getCanonicalPath)
         }
         val path = new Path(dir.getCanonicalPath, "_temporary")
         val fs = path.getFileSystem(hadoopConfiguration)

From c34c27fe9244939d8c905cd689536dfb81c74d7d Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Mon, 2 Nov 2015 23:52:36 -0800
Subject: [PATCH 458/896] [SPARK-9034][SQL] Reflect field names defined in
 GenericUDTF

Hive GenericUDTF#initialize() defines field names in a returned schema though,
the current HiveGenericUDTF drops these names.
We might need to reflect these in a logical plan tree.

Author: navis.ryu <navis@apache.org>

Closes #8456 from navis/SPARK-9034.
---
 .../spark/sql/catalyst/analysis/Analyzer.scala       | 11 +++++------
 .../spark/sql/catalyst/expressions/generators.scala  | 12 +++++++-----
 .../main/scala/org/apache/spark/sql/DataFrame.scala  | 10 +++++-----
 .../sql/hive/execution/HiveCompatibilitySuite.scala  |  1 +
 .../scala/org/apache/spark/sql/hive/hiveUDFs.scala   |  2 +-
 ...GenericUDTF #1-0-ff502d8c06f4b32f57aa45057b7fab0e |  1 +
 ...GenericUDTF #2-0-d6d0def30a7fad5f90fd835361820c30 |  1 +
 ...l_view_noalias-0-50131c0ba7b7a6b65c789a5a8497bada |  1 +
 ...l_view_noalias-1-72509f06e1f7c5d5ccc292f775f8eea7 |  0
 ...l_view_noalias-2-6d5806dd1d2511911a5de1e205523f42 |  2 ++
 ...l_view_noalias-3-155b3cc2f5054725a9c2acca3c38c00a |  0
 ...l_view_noalias-4-3b7045ace234af8e5e86d8ac23ccee56 |  2 ++
 ...al_view_noalias-5-e1eca4e08216897d090259d4fd1e3fe |  0
 ...l_view_noalias-6-16d227442dd775615c6ecfceedc6c612 |  0
 ...l_view_noalias-7-66cb5ab20690dd85b2ed95bbfb9481d3 |  2 ++
 .../spark/sql/hive/execution/HiveQuerySuite.scala    |  6 ++++++
 16 files changed, 34 insertions(+), 17 deletions(-)
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #1-0-ff502d8c06f4b32f57aa45057b7fab0e
 create mode 100644 sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #2-0-d6d0def30a7fad5f90fd835361820c30
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-0-50131c0ba7b7a6b65c789a5a8497bada
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-1-72509f06e1f7c5d5ccc292f775f8eea7
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-2-6d5806dd1d2511911a5de1e205523f42
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-3-155b3cc2f5054725a9c2acca3c38c00a
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-4-3b7045ace234af8e5e86d8ac23ccee56
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-5-e1eca4e08216897d090259d4fd1e3fe
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-6-16d227442dd775615c6ecfceedc6c612
 create mode 100644 sql/hive/src/test/resources/golden/lateral_view_noalias-7-66cb5ab20690dd85b2ed95bbfb9481d3

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 912c967b95f0..899ee67352df 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -147,7 +147,7 @@ class Analyzer(
             case u @ UnresolvedAlias(child) => child match {
               case ne: NamedExpression => ne
               case e if !e.resolved => u
-              case g: Generator if g.elementTypes.size > 1 => MultiAlias(g, Nil)
+              case g: Generator => MultiAlias(g, Nil)
               case c @ Cast(ne: NamedExpression, _) => Alias(c, ne.name)()
               case other => Alias(other, s"_c$i")()
             }
@@ -722,7 +722,7 @@ class Analyzer(
 
     /**
      * Construct the output attributes for a [[Generator]], given a list of names.  If the list of
-     * names is empty names are assigned by ordinal (i.e., _c0, _c1, ...) to match Hive's defaults.
+     * names is empty names are assigned from field names in generator.
      */
     private def makeGeneratorOutput(
         generator: Generator,
@@ -731,13 +731,12 @@ class Analyzer(
 
       if (names.length == elementTypes.length) {
         names.zip(elementTypes).map {
-          case (name, (t, nullable)) =>
+          case (name, (t, nullable, _)) =>
             AttributeReference(name, t, nullable)()
         }
       } else if (names.isEmpty) {
-        elementTypes.zipWithIndex.map {
-          // keep the default column names as Hive does _c0, _c1, _cN
-          case ((t, nullable), i) => AttributeReference(s"_c$i", t, nullable)()
+        elementTypes.map {
+          case (t, nullable, name) => AttributeReference(name, t, nullable)()
         }
       } else {
         failAnalysis(
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
index 1a2092c909c5..894a0730d1c2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
@@ -53,7 +53,7 @@ trait Generator extends Expression {
    * The output element data types in structure of Seq[(DataType, Nullable)]
    * TODO we probably need to add more information like metadata etc.
    */
-  def elementTypes: Seq[(DataType, Boolean)]
+  def elementTypes: Seq[(DataType, Boolean, String)]
 
   /** Should be implemented by child classes to perform specific Generators. */
   override def eval(input: InternalRow): TraversableOnce[InternalRow]
@@ -69,7 +69,7 @@ trait Generator extends Expression {
  * A generator that produces its output using the provided lambda function.
  */
 case class UserDefinedGenerator(
-    elementTypes: Seq[(DataType, Boolean)],
+    elementTypes: Seq[(DataType, Boolean, String)],
     function: Row => TraversableOnce[InternalRow],
     children: Seq[Expression])
   extends Generator with CodegenFallback {
@@ -112,9 +112,11 @@ case class Explode(child: Expression) extends UnaryExpression with Generator wit
     }
   }
 
-  override def elementTypes: Seq[(DataType, Boolean)] = child.dataType match {
-    case ArrayType(et, containsNull) => (et, containsNull) :: Nil
-    case MapType(kt, vt, valueContainsNull) => (kt, false) :: (vt, valueContainsNull) :: Nil
+  // hive-compatible default alias for explode function ("col" for array, "key", "value" for map)
+  override def elementTypes: Seq[(DataType, Boolean, String)] = child.dataType match {
+    case ArrayType(et, containsNull) => (et, containsNull, "col") :: Nil
+    case MapType(kt, vt, valueContainsNull) =>
+      (kt, false, "key") :: (vt, valueContainsNull, "value") :: Nil
   }
 
   override def eval(input: InternalRow): TraversableOnce[InternalRow] = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 53ad3c0266cd..fc0ab632f993 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1175,7 +1175,8 @@ class DataFrame private[sql](
   def explode[A <: Product : TypeTag](input: Column*)(f: Row => TraversableOnce[A]): DataFrame = {
     val schema = ScalaReflection.schemaFor[A].dataType.asInstanceOf[StructType]
 
-    val elementTypes = schema.toAttributes.map { attr => (attr.dataType, attr.nullable) }
+    val elementTypes = schema.toAttributes.map {
+      attr => (attr.dataType, attr.nullable, attr.name) }
     val names = schema.toAttributes.map(_.name)
     val convert = CatalystTypeConverters.createToCatalystConverter(schema)
 
@@ -1184,7 +1185,7 @@ class DataFrame private[sql](
     val generator = UserDefinedGenerator(elementTypes, rowFunction, input.map(_.expr))
 
     Generate(generator, join = true, outer = false,
-      qualifier = None, names.map(UnresolvedAttribute(_)), logicalPlan)
+      qualifier = None, generatorOutput = Nil, logicalPlan)
   }
 
   /**
@@ -1203,8 +1204,7 @@ class DataFrame private[sql](
     val dataType = ScalaReflection.schemaFor[B].dataType
     val attributes = AttributeReference(outputColumn, dataType)() :: Nil
     // TODO handle the metadata?
-    val elementTypes = attributes.map { attr => (attr.dataType, attr.nullable) }
-    val names = attributes.map(_.name)
+    val elementTypes = attributes.map { attr => (attr.dataType, attr.nullable, attr.name) }
 
     def rowFunction(row: Row): TraversableOnce[InternalRow] = {
       val convert = CatalystTypeConverters.createToCatalystConverter(dataType)
@@ -1213,7 +1213,7 @@ class DataFrame private[sql](
     val generator = UserDefinedGenerator(elementTypes, rowFunction, apply(inputColumn).expr :: Nil)
 
     Generate(generator, join = true, outer = false,
-      qualifier = None, names.map(UnresolvedAttribute(_)), logicalPlan)
+      qualifier = None, generatorOutput = Nil, logicalPlan)
   }
 
   /////////////////////////////////////////////////////////////////////////////
diff --git a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
index 6ed40b03975d..2d0d7b8af358 100644
--- a/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
+++ b/sql/hive/compatibility/src/test/scala/org/apache/spark/sql/hive/execution/HiveCompatibilitySuite.scala
@@ -661,6 +661,7 @@ class HiveCompatibilitySuite extends HiveQueryFileTest with BeforeAndAfter {
     "join_star",
     "lateral_view",
     "lateral_view_cp",
+    "lateral_view_noalias",
     "lateral_view_ppd",
     "leftsemijoin",
     "leftsemijoin_mr",
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index 0b5e86350614..a9db70119d01 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -511,7 +511,7 @@ private[hive] case class HiveGenericUDTF(
   protected lazy val collector = new UDTFCollector
 
   override lazy val elementTypes = outputInspector.getAllStructFieldRefs.asScala.map {
-    field => (inspectorToDataType(field.getFieldObjectInspector), true)
+    field => (inspectorToDataType(field.getFieldObjectInspector), true, field.getFieldName)
   }
 
   @transient
diff --git a/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #1-0-ff502d8c06f4b32f57aa45057b7fab0e b/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #1-0-ff502d8c06f4b32f57aa45057b7fab0e
new file mode 100644
index 000000000000..1cf253f92c05
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #1-0-ff502d8c06f4b32f57aa45057b7fab0e	
@@ -0,0 +1 @@
+238
diff --git a/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #2-0-d6d0def30a7fad5f90fd835361820c30 b/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #2-0-d6d0def30a7fad5f90fd835361820c30
new file mode 100644
index 000000000000..60878ffb7706
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/SPARK-9034 Reflect field names defined in GenericUDTF #2-0-d6d0def30a7fad5f90fd835361820c30	
@@ -0,0 +1 @@
+238	val_238
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-0-50131c0ba7b7a6b65c789a5a8497bada b/sql/hive/src/test/resources/golden/lateral_view_noalias-0-50131c0ba7b7a6b65c789a5a8497bada
new file mode 100644
index 000000000000..573541ac9702
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/lateral_view_noalias-0-50131c0ba7b7a6b65c789a5a8497bada
@@ -0,0 +1 @@
+0
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-1-72509f06e1f7c5d5ccc292f775f8eea7 b/sql/hive/src/test/resources/golden/lateral_view_noalias-1-72509f06e1f7c5d5ccc292f775f8eea7
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-2-6d5806dd1d2511911a5de1e205523f42 b/sql/hive/src/test/resources/golden/lateral_view_noalias-2-6d5806dd1d2511911a5de1e205523f42
new file mode 100644
index 000000000000..0da0d93886e0
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/lateral_view_noalias-2-6d5806dd1d2511911a5de1e205523f42
@@ -0,0 +1,2 @@
+key1	100
+key2	200
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-3-155b3cc2f5054725a9c2acca3c38c00a b/sql/hive/src/test/resources/golden/lateral_view_noalias-3-155b3cc2f5054725a9c2acca3c38c00a
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-4-3b7045ace234af8e5e86d8ac23ccee56 b/sql/hive/src/test/resources/golden/lateral_view_noalias-4-3b7045ace234af8e5e86d8ac23ccee56
new file mode 100644
index 000000000000..0da0d93886e0
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/lateral_view_noalias-4-3b7045ace234af8e5e86d8ac23ccee56
@@ -0,0 +1,2 @@
+key1	100
+key2	200
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-5-e1eca4e08216897d090259d4fd1e3fe b/sql/hive/src/test/resources/golden/lateral_view_noalias-5-e1eca4e08216897d090259d4fd1e3fe
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-6-16d227442dd775615c6ecfceedc6c612 b/sql/hive/src/test/resources/golden/lateral_view_noalias-6-16d227442dd775615c6ecfceedc6c612
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/sql/hive/src/test/resources/golden/lateral_view_noalias-7-66cb5ab20690dd85b2ed95bbfb9481d3 b/sql/hive/src/test/resources/golden/lateral_view_noalias-7-66cb5ab20690dd85b2ed95bbfb9481d3
new file mode 100644
index 000000000000..4ba46bbda5b0
--- /dev/null
+++ b/sql/hive/src/test/resources/golden/lateral_view_noalias-7-66cb5ab20690dd85b2ed95bbfb9481d3
@@ -0,0 +1,2 @@
+key1	100	key1	100
+key2	200	key2	200
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index e597d6865f67..fc72e3c7dc6a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -563,6 +563,12 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
   createQueryTest("Specify the udtf output",
     "SELECT d FROM (SELECT explode(array(1,1)) d FROM src LIMIT 1) t")
 
+  createQueryTest("SPARK-9034 Reflect field names defined in GenericUDTF #1",
+    "SELECT col FROM (SELECT explode(array(key,value)) FROM src LIMIT 1) t")
+
+  createQueryTest("SPARK-9034 Reflect field names defined in GenericUDTF #2",
+    "SELECT key,value FROM (SELECT explode(map(key,value)) FROM src LIMIT 1) t")
+
   test("sampling") {
     sql("SELECT * FROM src TABLESAMPLE(0.1 PERCENT) s")
     sql("SELECT * FROM src TABLESAMPLE(100 PERCENT) s")

From d728d5c98658c44ed2949b55d36edeaa46f8c980 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 3 Nov 2015 00:12:49 -0800
Subject: [PATCH 459/896] [SPARK-9858][SPARK-9859][SPARK-9861][SQL] Add an
 ExchangeCoordinator to estimate the number of post-shuffle partitions for
 aggregates and joins

https://issues.apache.org/jira/browse/SPARK-9858
https://issues.apache.org/jira/browse/SPARK-9859
https://issues.apache.org/jira/browse/SPARK-9861

Author: Yin Huai <yhuai@databricks.com>

Closes #9276 from yhuai/numReducer.
---
 .../plans/physical/partitioning.scala         |   8 +
 .../scala/org/apache/spark/sql/SQLConf.scala  |  27 +
 .../apache/spark/sql/execution/Exchange.scala | 217 +++++++-
 .../sql/execution/ExchangeCoordinator.scala   | 260 ++++++++++
 .../spark/sql/execution/ShuffledRowRDD.scala  | 134 ++++-
 .../execution/ExchangeCoordinatorSuite.scala  | 479 ++++++++++++++++++
 .../spark/sql/execution/PlannerSuite.scala    |   8 +-
 .../execution/UnsafeRowSerializerSuite.scala  |   7 +-
 .../sql/execution/joins/InnerJoinSuite.scala  |  19 +-
 9 files changed, 1115 insertions(+), 44 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
index 86b9417477ba..9312c8123e92 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
@@ -165,6 +165,11 @@ sealed trait Partitioning {
    * produced by `A` could have also been produced by `B`.
    */
   def guarantees(other: Partitioning): Boolean = this == other
+
+  def withNumPartitions(newNumPartitions: Int): Partitioning = {
+    throw new IllegalStateException(
+      s"It is not allowed to call withNumPartitions method of a ${this.getClass.getSimpleName}")
+  }
 }
 
 object Partitioning {
@@ -249,6 +254,9 @@ case class HashPartitioning(expressions: Seq[Expression], numPartitions: Int)
     case _ => false
   }
 
+  override def withNumPartitions(newNumPartitions: Int): HashPartitioning = {
+    HashPartitioning(expressions, newNumPartitions)
+  }
 }
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 6f2892085a8f..ed8b634ad563 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -233,6 +233,25 @@ private[spark] object SQLConf {
     defaultValue = Some(200),
     doc = "The default number of partitions to use when shuffling data for joins or aggregations.")
 
+  val SHUFFLE_TARGET_POSTSHUFFLE_INPUT_SIZE =
+    longConf("spark.sql.adaptive.shuffle.targetPostShuffleInputSize",
+      defaultValue = Some(64 * 1024 * 1024),
+      doc = "The target post-shuffle input size in bytes of a task.")
+
+  val ADAPTIVE_EXECUTION_ENABLED = booleanConf("spark.sql.adaptive.enabled",
+    defaultValue = Some(false),
+    doc = "When true, enable adaptive query execution.")
+
+  val SHUFFLE_MIN_NUM_POSTSHUFFLE_PARTITIONS =
+    intConf("spark.sql.adaptive.minNumPostShufflePartitions",
+      defaultValue = Some(-1),
+      doc = "The advisory minimal number of post-shuffle partitions provided to " +
+        "ExchangeCoordinator. This setting is used in our test to make sure we " +
+        "have enough parallelism to expose issues that will not be exposed with a " +
+        "single partition. When the value is a non-positive value, this setting will" +
+        "not be provided to ExchangeCoordinator.",
+      isPublic = false)
+
   val TUNGSTEN_ENABLED = booleanConf("spark.sql.tungsten.enabled",
     defaultValue = Some(true),
     doc = "When true, use the optimized Tungsten physical execution backend which explicitly " +
@@ -487,6 +506,14 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def numShufflePartitions: Int = getConf(SHUFFLE_PARTITIONS)
 
+  private[spark] def targetPostShuffleInputSize: Long =
+    getConf(SHUFFLE_TARGET_POSTSHUFFLE_INPUT_SIZE)
+
+  private[spark] def adaptiveExecutionEnabled: Boolean = getConf(ADAPTIVE_EXECUTION_ENABLED)
+
+  private[spark] def minNumPostShufflePartitions: Int =
+    getConf(SHUFFLE_MIN_NUM_POSTSHUFFLE_PARTITIONS)
+
   private[spark] def parquetFilterPushDown: Boolean = getConf(PARQUET_FILTER_PUSHDOWN_ENABLED)
 
   private[spark] def orcFilterPushDown: Boolean = getConf(ORC_FILTER_PUSHDOWN_ENABLED)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index e81108b7884d..0f72ec6cc107 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -36,9 +36,23 @@ import org.apache.spark.util.MutablePair
 /**
  * Performs a shuffle that will result in the desired `newPartitioning`.
  */
-case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends UnaryNode {
+case class Exchange(
+    var newPartitioning: Partitioning,
+    child: SparkPlan,
+    @transient coordinator: Option[ExchangeCoordinator]) extends UnaryNode {
 
-  override def nodeName: String = if (tungstenMode) "TungstenExchange" else "Exchange"
+  override def nodeName: String = {
+    val extraInfo = coordinator match {
+      case Some(exchangeCoordinator) if exchangeCoordinator.isEstimated =>
+        "Shuffle"
+      case Some(exchangeCoordinator) if !exchangeCoordinator.isEstimated =>
+        "May shuffle"
+      case None => "Shuffle without coordinator"
+    }
+
+    val simpleNodeName = if (tungstenMode) "TungstenExchange" else "Exchange"
+    s"$simpleNodeName($extraInfo)"
+  }
 
   /**
    * Returns true iff we can support the data type, and we are not doing range partitioning.
@@ -129,7 +143,27 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
     }
   }
 
-  protected override def doExecute(): RDD[InternalRow] = attachTree(this , "execute") {
+  override protected def doPrepare(): Unit = {
+    // If an ExchangeCoordinator is needed, we register this Exchange operator
+    // to the coordinator when we do prepare. It is important to make sure
+    // we register this operator right before the execution instead of register it
+    // in the constructor because it is possible that we create new instances of
+    // Exchange operators when we transform the physical plan
+    // (then the ExchangeCoordinator will hold references of unneeded Exchanges).
+    // So, we should only call registerExchange just before we start to execute
+    // the plan.
+    coordinator match {
+      case Some(exchangeCoordinator) => exchangeCoordinator.registerExchange(this)
+      case None =>
+    }
+  }
+
+  /**
+   * Returns a [[ShuffleDependency]] that will partition rows of its child based on
+   * the partitioning scheme defined in `newPartitioning`. Those partitions of
+   * the returned ShuffleDependency will be the input of shuffle.
+   */
+  private[sql] def prepareShuffleDependency(): ShuffleDependency[Int, InternalRow, InternalRow] = {
     val rdd = child.execute()
     val part: Partitioner = newPartitioning match {
       case RoundRobinPartitioning(numPartitions) => new HashPartitioner(numPartitions)
@@ -181,7 +215,54 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
         }
       }
     }
-    new ShuffledRowRDD(rddWithPartitionIds, serializer, part.numPartitions)
+
+    // Now, we manually create a ShuffleDependency. Because pairs in rddWithPartitionIds
+    // are in the form of (partitionId, row) and every partitionId is in the expected range
+    // [0, part.numPartitions - 1]. The partitioner of this is a PartitionIdPassthrough.
+    val dependency =
+      new ShuffleDependency[Int, InternalRow, InternalRow](
+        rddWithPartitionIds,
+        new PartitionIdPassthrough(part.numPartitions),
+        Some(serializer))
+
+    dependency
+  }
+
+  /**
+   * Returns a [[ShuffledRowRDD]] that represents the post-shuffle dataset.
+   * This [[ShuffledRowRDD]] is created based on a given [[ShuffleDependency]] and an optional
+   * partition start indices array. If this optional array is defined, the returned
+   * [[ShuffledRowRDD]] will fetch pre-shuffle partitions based on indices of this array.
+   */
+  private[sql] def preparePostShuffleRDD(
+      shuffleDependency: ShuffleDependency[Int, InternalRow, InternalRow],
+      specifiedPartitionStartIndices: Option[Array[Int]] = None): ShuffledRowRDD = {
+    // If an array of partition start indices is provided, we need to use this array
+    // to create the ShuffledRowRDD. Also, we need to update newPartitioning to
+    // update the number of post-shuffle partitions.
+    specifiedPartitionStartIndices.foreach { indices =>
+      assert(newPartitioning.isInstanceOf[HashPartitioning])
+      newPartitioning = newPartitioning.withNumPartitions(indices.length)
+    }
+    new ShuffledRowRDD(shuffleDependency, specifiedPartitionStartIndices)
+  }
+
+  protected override def doExecute(): RDD[InternalRow] = attachTree(this , "execute") {
+    coordinator match {
+      case Some(exchangeCoordinator) =>
+        val shuffleRDD = exchangeCoordinator.postShuffleRDD(this)
+        assert(shuffleRDD.partitions.length == newPartitioning.numPartitions)
+        shuffleRDD
+      case None =>
+        val shuffleDependency = prepareShuffleDependency()
+        preparePostShuffleRDD(shuffleDependency)
+    }
+  }
+}
+
+object Exchange {
+  def apply(newPartitioning: Partitioning, child: SparkPlan): Exchange = {
+    Exchange(newPartitioning, child, None: Option[ExchangeCoordinator])
   }
 }
 
@@ -193,13 +274,22 @@ case class Exchange(newPartitioning: Partitioning, child: SparkPlan) extends Una
  * input partition ordering requirements are met.
  */
 private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[SparkPlan] {
-  // TODO: Determine the number of partitions.
-  private def defaultPartitions: Int = sqlContext.conf.numShufflePartitions
+  private def defaultNumPreShufflePartitions: Int = sqlContext.conf.numShufflePartitions
+
+  private def targetPostShuffleInputSize: Long = sqlContext.conf.targetPostShuffleInputSize
+
+  private def adaptiveExecutionEnabled: Boolean = sqlContext.conf.adaptiveExecutionEnabled
+
+  private def minNumPostShufflePartitions: Option[Int] = {
+    val minNumPostShufflePartitions = sqlContext.conf.minNumPostShufflePartitions
+    if (minNumPostShufflePartitions > 0) Some(minNumPostShufflePartitions) else None
+  }
 
   /**
    * Given a required distribution, returns a partitioning that satisfies that distribution.
    */
-  private def createPartitioning(requiredDistribution: Distribution,
+  private def createPartitioning(
+      requiredDistribution: Distribution,
       numPartitions: Int): Partitioning = {
     requiredDistribution match {
       case AllTuples => SinglePartition
@@ -209,6 +299,98 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
     }
   }
 
+  /**
+   * Adds [[ExchangeCoordinator]] to [[Exchange]]s if adaptive query execution is enabled
+   * and partitioning schemes of these [[Exchange]]s support [[ExchangeCoordinator]].
+   */
+  private def withExchangeCoordinator(
+      children: Seq[SparkPlan],
+      requiredChildDistributions: Seq[Distribution]): Seq[SparkPlan] = {
+    val supportsCoordinator =
+      if (children.exists(_.isInstanceOf[Exchange])) {
+        // Right now, ExchangeCoordinator only support HashPartitionings.
+        children.forall {
+          case e @ Exchange(hash: HashPartitioning, _, _) => true
+          case child =>
+            child.outputPartitioning match {
+              case hash: HashPartitioning => true
+              case collection: PartitioningCollection =>
+                collection.partitionings.exists(_.isInstanceOf[HashPartitioning])
+              case _ => false
+            }
+        }
+      } else {
+        // In this case, although we do not have Exchange operators, we may still need to
+        // shuffle data when we have more than one children because data generated by
+        // these children may not be partitioned in the same way.
+        // Please see the comment in withCoordinator for more details.
+        val supportsDistribution =
+          requiredChildDistributions.forall(_.isInstanceOf[ClusteredDistribution])
+        children.length > 1 && supportsDistribution
+      }
+
+    val withCoordinator =
+      if (adaptiveExecutionEnabled && supportsCoordinator) {
+        val coordinator =
+          new ExchangeCoordinator(
+            children.length,
+            targetPostShuffleInputSize,
+            minNumPostShufflePartitions)
+        children.zip(requiredChildDistributions).map {
+          case (e: Exchange, _) =>
+            // This child is an Exchange, we need to add the coordinator.
+            e.copy(coordinator = Some(coordinator))
+          case (child, distribution) =>
+            // If this child is not an Exchange, we need to add an Exchange for now.
+            // Ideally, we can try to avoid this Exchange. However, when we reach here,
+            // there are at least two children operators (because if there is a single child
+            // and we can avoid Exchange, supportsCoordinator will be false and we
+            // will not reach here.). Although we can make two children have the same number of
+            // post-shuffle partitions. Their numbers of pre-shuffle partitions may be different.
+            // For example, let's say we have the following plan
+            //         Join
+            //         /  \
+            //       Agg  Exchange
+            //       /      \
+            //    Exchange  t2
+            //      /
+            //     t1
+            // In this case, because a post-shuffle partition can include multiple pre-shuffle
+            // partitions, a HashPartitioning will not be strictly partitioned by the hashcodes
+            // after shuffle. So, even we can use the child Exchange operator of the Join to
+            // have a number of post-shuffle partitions that matches the number of partitions of
+            // Agg, we cannot say these two children are partitioned in the same way.
+            // Here is another case
+            //         Join
+            //         /  \
+            //       Agg1  Agg2
+            //       /      \
+            //   Exchange1  Exchange2
+            //       /       \
+            //      t1       t2
+            // In this case, two Aggs shuffle data with the same column of the join condition.
+            // After we use ExchangeCoordinator, these two Aggs may not be partitioned in the same
+            // way. Let's say that Agg1 and Agg2 both have 5 pre-shuffle partitions and 2
+            // post-shuffle partitions. It is possible that Agg1 fetches those pre-shuffle
+            // partitions by using a partitionStartIndices [0, 3]. However, Agg2 may fetch its
+            // pre-shuffle partitions by using another partitionStartIndices [0, 4].
+            // So, Agg1 and Agg2 are actually not co-partitioned.
+            //
+            // It will be great to introduce a new Partitioning to represent the post-shuffle
+            // partitions when one post-shuffle partition includes multiple pre-shuffle partitions.
+            val targetPartitioning =
+              createPartitioning(distribution, defaultNumPreShufflePartitions)
+            assert(targetPartitioning.isInstanceOf[HashPartitioning])
+            Exchange(targetPartitioning, child, Some(coordinator))
+        }
+      } else {
+        // If we do not need ExchangeCoordinator, the original children are returned.
+        children
+      }
+
+    withCoordinator
+  }
+
   private def ensureDistributionAndOrdering(operator: SparkPlan): SparkPlan = {
     val requiredChildDistributions: Seq[Distribution] = operator.requiredChildDistribution
     val requiredChildOrderings: Seq[Seq[SortOrder]] = operator.requiredChildOrdering
@@ -221,7 +403,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       if (child.outputPartitioning.satisfies(distribution)) {
         child
       } else {
-        Exchange(createPartitioning(distribution, defaultPartitions), child)
+        Exchange(createPartitioning(distribution, defaultNumPreShufflePartitions), child)
       }
     }
 
@@ -234,7 +416,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       // First check if the existing partitions of the children all match. This means they are
       // partitioned by the same partitioning into the same number of partitions. In that case,
       // don't try to make them match `defaultPartitions`, just use the existing partitioning.
-      // TODO: this should be a cost based descision. For example, a big relation should probably
+      // TODO: this should be a cost based decision. For example, a big relation should probably
       // maintain its existing number of partitions and smaller partitions should be shuffled.
       // defaultPartitions is arbitrary.
       val numPartitions = children.head.outputPartitioning.numPartitions
@@ -250,7 +432,8 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       } else {
         children.zip(requiredChildDistributions).map {
           case (child, distribution) => {
-            val targetPartitioning = createPartitioning(distribution, defaultPartitions)
+            val targetPartitioning =
+              createPartitioning(distribution, defaultNumPreShufflePartitions)
             if (child.outputPartitioning.guarantees(targetPartitioning)) {
               child
             } else {
@@ -261,12 +444,24 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       }
     }
 
+    // Now, we need to add ExchangeCoordinator if necessary.
+    // Actually, it is not a good idea to add ExchangeCoordinators while we are adding Exchanges.
+    // However, with the way that we plan the query, we do not have a place where we have a
+    // global picture of all shuffle dependencies of a post-shuffle stage. So, we add coordinator
+    // at here for now.
+    // Once we finish https://issues.apache.org/jira/browse/SPARK-10665,
+    // we can first add Exchanges and then add coordinator once we have a DAG of query fragments.
+    children = withExchangeCoordinator(children, requiredChildDistributions)
+
     // Now that we've performed any necessary shuffles, add sorts to guarantee output orderings:
     children = children.zip(requiredChildOrderings).map { case (child, requiredOrdering) =>
       if (requiredOrdering.nonEmpty) {
         // If child.outputOrdering is [a, b] and requiredOrdering is [a], we do not need to sort.
         if (requiredOrdering != child.outputOrdering.take(requiredOrdering.length)) {
-          sqlContext.planner.BasicOperators.getSortOperator(requiredOrdering, global = false, child)
+          sqlContext.planner.BasicOperators.getSortOperator(
+            requiredOrdering,
+            global = false,
+            child)
         } else {
           child
         }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
new file mode 100644
index 000000000000..8dbd69e1f44b
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
@@ -0,0 +1,260 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import java.util.{Map => JMap, HashMap => JHashMap}
+
+import scala.collection.mutable.ArrayBuffer
+
+import org.apache.spark.{Logging, SimpleFutureAction, ShuffleDependency, MapOutputStatistics}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.InternalRow
+
+/**
+ * A coordinator used to determines how we shuffle data between stages generated by Spark SQL.
+ * Right now, the work of this coordinator is to determine the number of post-shuffle partitions
+ * for a stage that needs to fetch shuffle data from one or multiple stages.
+ *
+ * A coordinator is constructed with three parameters, `numExchanges`,
+ * `targetPostShuffleInputSize`, and `minNumPostShufflePartitions`.
+ *  - `numExchanges` is used to indicated that how many [[Exchange]]s that will be registered to
+ *    this coordinator. So, when we start to do any actual work, we have a way to make sure that
+ *    we have got expected number of [[Exchange]]s.
+ *  - `targetPostShuffleInputSize` is the targeted size of a post-shuffle partition's
+ *    input data size. With this parameter, we can estimate the number of post-shuffle partitions.
+ *    This parameter is configured through
+ *    `spark.sql.adaptive.shuffle.targetPostShuffleInputSize`.
+ *  - `minNumPostShufflePartitions` is an optional parameter. If it is defined, this coordinator
+ *    will try to make sure that there are at least `minNumPostShufflePartitions` post-shuffle
+ *    partitions.
+ *
+ * The workflow of this coordinator is described as follows:
+ *  - Before the execution of a [[SparkPlan]], for an [[Exchange]] operator,
+ *    if an [[ExchangeCoordinator]] is assigned to it, it registers itself to this coordinator.
+ *    This happens in the `doPrepare` method.
+ *  - Once we start to execute a physical plan, an [[Exchange]] registered to this coordinator will
+ *    call `postShuffleRDD` to get its corresponding post-shuffle [[ShuffledRowRDD]].
+ *    If this coordinator has made the decision on how to shuffle data, this [[Exchange]] will
+ *    immediately get its corresponding post-shuffle [[ShuffledRowRDD]].
+ *  - If this coordinator has not made the decision on how to shuffle data, it will ask those
+ *    registered [[Exchange]]s to submit their pre-shuffle stages. Then, based on the the size
+ *    statistics of pre-shuffle partitions, this coordinator will determine the number of
+ *    post-shuffle partitions and pack multiple pre-shuffle partitions with continuous indices
+ *    to a single post-shuffle partition whenever necessary.
+ *  - Finally, this coordinator will create post-shuffle [[ShuffledRowRDD]]s for all registered
+ *    [[Exchange]]s. So, when an [[Exchange]] calls `postShuffleRDD`, this coordinator can
+ *    lookup the corresponding [[RDD]].
+ *
+ * The strategy used to determine the number of post-shuffle partitions is described as follows.
+ * To determine the number of post-shuffle partitions, we have a target input size for a
+ * post-shuffle partition. Once we have size statistics of pre-shuffle partitions from stages
+ * corresponding to the registered [[Exchange]]s, we will do a pass of those statistics and
+ * pack pre-shuffle partitions with continuous indices to a single post-shuffle partition until
+ * the size of a post-shuffle partition is equal or greater than the target size.
+ * For example, we have two stages with the following pre-shuffle partition size statistics:
+ * stage 1: [100 MB, 20 MB, 100 MB, 10MB, 30 MB]
+ * stage 2: [10 MB,  10 MB, 70 MB,  5 MB, 5 MB]
+ * assuming the target input size is 128 MB, we will have three post-shuffle partitions,
+ * which are:
+ *  - post-shuffle partition 0: pre-shuffle partition 0 and 1
+ *  - post-shuffle partition 1: pre-shuffle partition 2
+ *  - post-shuffle partition 2: pre-shuffle partition 3 and 4
+ */
+private[sql] class ExchangeCoordinator(
+    numExchanges: Int,
+    advisoryTargetPostShuffleInputSize: Long,
+    minNumPostShufflePartitions: Option[Int] = None)
+  extends Logging {
+
+  // The registered Exchange operators.
+  private[this] val exchanges = ArrayBuffer[Exchange]()
+
+  // This map is used to lookup the post-shuffle ShuffledRowRDD for an Exchange operator.
+  private[this] val postShuffleRDDs: JMap[Exchange, ShuffledRowRDD] =
+    new JHashMap[Exchange, ShuffledRowRDD](numExchanges)
+
+  // A boolean that indicates if this coordinator has made decision on how to shuffle data.
+  // This variable will only be updated by doEstimationIfNecessary, which is protected by
+  // synchronized.
+  @volatile private[this] var estimated: Boolean = false
+
+  /**
+   * Registers an [[Exchange]] operator to this coordinator. This method is only allowed to be
+   * called in the `doPrepare` method of an [[Exchange]] operator.
+   */
+  def registerExchange(exchange: Exchange): Unit = synchronized {
+    exchanges += exchange
+  }
+
+  def isEstimated: Boolean = estimated
+
+  /**
+   * Estimates partition start indices for post-shuffle partitions based on
+   * mapOutputStatistics provided by all pre-shuffle stages.
+   */
+  private[sql] def estimatePartitionStartIndices(
+      mapOutputStatistics: Array[MapOutputStatistics]): Array[Int] = {
+    // If we have mapOutputStatistics.length <= numExchange, it is because we do not submit
+    // a stage when the number of partitions of this dependency is 0.
+    assert(mapOutputStatistics.length <= numExchanges)
+
+    // If minNumPostShufflePartitions is defined, it is possible that we need to use a
+    // value less than advisoryTargetPostShuffleInputSize as the target input size of
+    // a post shuffle task.
+    val targetPostShuffleInputSize = minNumPostShufflePartitions match {
+      case Some(numPartitions) =>
+        val totalPostShuffleInputSize = mapOutputStatistics.map(_.bytesByPartitionId.sum).sum
+        // The max at here is to make sure that when we have an empty table, we
+        // only have a single post-shuffle partition.
+        val maxPostShuffleInputSize =
+          math.max(math.ceil(totalPostShuffleInputSize / numPartitions.toDouble).toLong, 16)
+        math.min(maxPostShuffleInputSize, advisoryTargetPostShuffleInputSize)
+
+      case None => advisoryTargetPostShuffleInputSize
+    }
+
+    logInfo(
+      s"advisoryTargetPostShuffleInputSize: $advisoryTargetPostShuffleInputSize, " +
+      s"targetPostShuffleInputSize $targetPostShuffleInputSize.")
+
+    // Make sure we do get the same number of pre-shuffle partitions for those stages.
+    val distinctNumPreShufflePartitions =
+      mapOutputStatistics.map(stats => stats.bytesByPartitionId.length).distinct
+    assert(
+      distinctNumPreShufflePartitions.length == 1,
+      "There should be only one distinct value of the number pre-shuffle partitions " +
+        "among registered Exchange operator.")
+    val numPreShufflePartitions = distinctNumPreShufflePartitions.head
+
+    val partitionStartIndices = ArrayBuffer[Int]()
+    // The first element of partitionStartIndices is always 0.
+    partitionStartIndices += 0
+
+    var postShuffleInputSize = 0L
+
+    var i = 0
+    while (i < numPreShufflePartitions) {
+      // We calculate the total size of ith pre-shuffle partitions from all pre-shuffle stages.
+      // Then, we add the total size to postShuffleInputSize.
+      var j = 0
+      while (j < mapOutputStatistics.length) {
+        postShuffleInputSize += mapOutputStatistics(j).bytesByPartitionId(i)
+        j += 1
+      }
+
+      // If the current postShuffleInputSize is equal or greater than the
+      // targetPostShuffleInputSize, We need to add a new element in partitionStartIndices.
+      if (postShuffleInputSize >= targetPostShuffleInputSize) {
+        if (i < numPreShufflePartitions - 1) {
+          // Next start index.
+          partitionStartIndices += i + 1
+        } else {
+          // This is the last element. So, we do not need to append the next start index to
+          // partitionStartIndices.
+        }
+        // reset postShuffleInputSize.
+        postShuffleInputSize = 0L
+      }
+
+      i += 1
+    }
+
+    partitionStartIndices.toArray
+  }
+
+  private def doEstimationIfNecessary(): Unit = synchronized {
+    // It is unlikely that this method will be called from multiple threads
+    // (when multiple threads trigger the execution of THIS physical)
+    // because in common use cases, we will create new physical plan after
+    // users apply operations (e.g. projection) to an existing DataFrame.
+    // However, if it happens, we have synchronized to make sure only one
+    // thread will trigger the job submission.
+    if (!estimated) {
+      // Make sure we have the expected number of registered Exchange operators.
+      assert(exchanges.length == numExchanges)
+
+      val newPostShuffleRDDs = new JHashMap[Exchange, ShuffledRowRDD](numExchanges)
+
+      // Submit all map stages
+      val shuffleDependencies = ArrayBuffer[ShuffleDependency[Int, InternalRow, InternalRow]]()
+      val submittedStageFutures = ArrayBuffer[SimpleFutureAction[MapOutputStatistics]]()
+      var i = 0
+      while (i < numExchanges) {
+        val exchange = exchanges(i)
+        val shuffleDependency = exchange.prepareShuffleDependency()
+        shuffleDependencies += shuffleDependency
+        if (shuffleDependency.rdd.partitions.length != 0) {
+          // submitMapStage does not accept RDD with 0 partition.
+          // So, we will not submit this dependency.
+          submittedStageFutures +=
+            exchange.sqlContext.sparkContext.submitMapStage(shuffleDependency)
+        }
+        i += 1
+      }
+
+      // Wait for the finishes of those submitted map stages.
+      val mapOutputStatistics = new Array[MapOutputStatistics](submittedStageFutures.length)
+      i = 0
+      while (i < submittedStageFutures.length) {
+        // This call is a blocking call. If the stage has not finished, we will wait at here.
+        mapOutputStatistics(i) = submittedStageFutures(i).get()
+        i += 1
+      }
+
+      // Now, we estimate partitionStartIndices. partitionStartIndices.length will be the
+      // number of post-shuffle partitions.
+      val partitionStartIndices =
+        if (mapOutputStatistics.length == 0) {
+          None
+        } else {
+          Some(estimatePartitionStartIndices(mapOutputStatistics))
+        }
+
+      i = 0
+      while (i < numExchanges) {
+        val exchange = exchanges(i)
+        val rdd =
+          exchange.preparePostShuffleRDD(shuffleDependencies(i), partitionStartIndices)
+        newPostShuffleRDDs.put(exchange, rdd)
+
+        i += 1
+      }
+
+      // Finally, we set postShuffleRDDs and estimated.
+      assert(postShuffleRDDs.isEmpty)
+      assert(newPostShuffleRDDs.size() == numExchanges)
+      postShuffleRDDs.putAll(newPostShuffleRDDs)
+      estimated = true
+    }
+  }
+
+  def postShuffleRDD(exchange: Exchange): ShuffledRowRDD = {
+    doEstimationIfNecessary()
+
+    if (!postShuffleRDDs.containsKey(exchange)) {
+      throw new IllegalStateException(
+        s"The given $exchange is not registered in this coordinator.")
+    }
+
+    postShuffleRDDs.get(exchange)
+  }
+
+  override def toString: String = {
+    s"coordinator[target post-shuffle partition size: $advisoryTargetPostShuffleInputSize]"
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
index fb338b90bf79..42891287a300 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ShuffledRowRDD.scala
@@ -17,14 +17,23 @@
 
 package org.apache.spark.sql.execution
 
+import java.util.Arrays
+
 import org.apache.spark._
 import org.apache.spark.rdd.RDD
-import org.apache.spark.serializer.Serializer
 import org.apache.spark.sql.catalyst.InternalRow
 
-private class ShuffledRowRDDPartition(val idx: Int) extends Partition {
-  override val index: Int = idx
-  override def hashCode(): Int = idx
+/**
+ * The [[Partition]] used by [[ShuffledRowRDD]]. A post-shuffle partition
+ * (identified by `postShufflePartitionIndex`) contains a range of pre-shuffle partitions
+ * (`startPreShufflePartitionIndex` to `endPreShufflePartitionIndex - 1`, inclusive).
+ */
+private final class ShuffledRowRDDPartition(
+    val postShufflePartitionIndex: Int,
+    val startPreShufflePartitionIndex: Int,
+    val endPreShufflePartitionIndex: Int) extends Partition {
+  override val index: Int = postShufflePartitionIndex
+  override def hashCode(): Int = postShufflePartitionIndex
 }
 
 /**
@@ -35,33 +44,107 @@ private class PartitionIdPassthrough(override val numPartitions: Int) extends Pa
   override def getPartition(key: Any): Int = key.asInstanceOf[Int]
 }
 
+/**
+ * A Partitioner that might group together one or more partitions from the parent.
+ *
+ * @param parent a parent partitioner
+ * @param partitionStartIndices indices of partitions in parent that should create new partitions
+ *   in child (this should be an array of increasing partition IDs). For example, if we have a
+ *   parent with 5 partitions, and partitionStartIndices is [0, 2, 4], we get three output
+ *   partitions, corresponding to partition ranges [0, 1], [2, 3] and [4] of the parent partitioner.
+ */
+class CoalescedPartitioner(val parent: Partitioner, val partitionStartIndices: Array[Int])
+  extends Partitioner {
+
+  @transient private lazy val parentPartitionMapping: Array[Int] = {
+    val n = parent.numPartitions
+    val result = new Array[Int](n)
+    for (i <- 0 until partitionStartIndices.length) {
+      val start = partitionStartIndices(i)
+      val end = if (i < partitionStartIndices.length - 1) partitionStartIndices(i + 1) else n
+      for (j <- start until end) {
+        result(j) = i
+      }
+    }
+    result
+  }
+
+  override def numPartitions: Int = partitionStartIndices.length
+
+  override def getPartition(key: Any): Int = {
+    parentPartitionMapping(parent.getPartition(key))
+  }
+
+  override def equals(other: Any): Boolean = other match {
+    case c: CoalescedPartitioner =>
+      c.parent == parent && Arrays.equals(c.partitionStartIndices, partitionStartIndices)
+    case _ =>
+      false
+  }
+
+  override def hashCode(): Int = 31 * parent.hashCode() + Arrays.hashCode(partitionStartIndices)
+}
+
 /**
  * This is a specialized version of [[org.apache.spark.rdd.ShuffledRDD]] that is optimized for
  * shuffling rows instead of Java key-value pairs. Note that something like this should eventually
  * be implemented in Spark core, but that is blocked by some more general refactorings to shuffle
  * interfaces / internals.
  *
- * @param prev the RDD being shuffled. Elements of this RDD are (partitionId, Row) pairs.
- *             Partition ids should be in the range [0, numPartitions - 1].
- * @param serializer the serializer used during the shuffle.
- * @param numPartitions the number of post-shuffle partitions.
+ * This RDD takes a [[ShuffleDependency]] (`dependency`),
+ * and a optional array of partition start indices as input arguments
+ * (`specifiedPartitionStartIndices`).
+ *
+ * The `dependency` has the parent RDD of this RDD, which represents the dataset before shuffle
+ * (i.e. map output). Elements of this RDD are (partitionId, Row) pairs.
+ * Partition ids should be in the range [0, numPartitions - 1].
+ * `dependency.partitioner` is the original partitioner used to partition
+ * map output, and `dependency.partitioner.numPartitions` is the number of pre-shuffle partitions
+ * (i.e. the number of partitions of the map output).
+ *
+ * When `specifiedPartitionStartIndices` is defined, `specifiedPartitionStartIndices.length`
+ * will be the number of post-shuffle partitions. For this case, the `i`th post-shuffle
+ * partition includes `specifiedPartitionStartIndices[i]` to
+ * `specifiedPartitionStartIndices[i+1] - 1` (inclusive).
+ *
+ * When `specifiedPartitionStartIndices` is not defined, there will be
+ * `dependency.partitioner.numPartitions` post-shuffle partitions. For this case,
+ * a post-shuffle partition is created for every pre-shuffle partition.
  */
 class ShuffledRowRDD(
-    @transient var prev: RDD[Product2[Int, InternalRow]],
-    serializer: Serializer,
-    numPartitions: Int)
-  extends RDD[InternalRow](prev.context, Nil) {
+    var dependency: ShuffleDependency[Int, InternalRow, InternalRow],
+    specifiedPartitionStartIndices: Option[Array[Int]] = None)
+  extends RDD[InternalRow](dependency.rdd.context, Nil) {
 
-  private val part: Partitioner = new PartitionIdPassthrough(numPartitions)
+  private[this] val numPreShufflePartitions = dependency.partitioner.numPartitions
 
-  override def getDependencies: Seq[Dependency[_]] = {
-    List(new ShuffleDependency[Int, InternalRow, InternalRow](prev, part, Some(serializer)))
+  private[this] val partitionStartIndices: Array[Int] = specifiedPartitionStartIndices match {
+    case Some(indices) => indices
+    case None =>
+      // When specifiedPartitionStartIndices is not defined, every post-shuffle partition
+      // corresponds to a pre-shuffle partition.
+      (0 until numPreShufflePartitions).toArray
   }
 
-  override val partitioner = Some(part)
+  private[this] val part: Partitioner =
+    new CoalescedPartitioner(dependency.partitioner, partitionStartIndices)
+
+  override def getDependencies: Seq[Dependency[_]] = List(dependency)
+
+  override val partitioner: Option[Partitioner] = Some(part)
 
   override def getPartitions: Array[Partition] = {
-    Array.tabulate[Partition](part.numPartitions)(i => new ShuffledRowRDDPartition(i))
+    assert(partitionStartIndices.length == part.numPartitions)
+    Array.tabulate[Partition](partitionStartIndices.length) { i =>
+      val startIndex = partitionStartIndices(i)
+      val endIndex =
+        if (i < partitionStartIndices.length - 1) {
+          partitionStartIndices(i + 1)
+        } else {
+          numPreShufflePartitions
+        }
+      new ShuffledRowRDDPartition(i, startIndex, endIndex)
+    }
   }
 
   override def getPreferredLocations(partition: Partition): Seq[String] = {
@@ -71,15 +154,20 @@ class ShuffledRowRDD(
   }
 
   override def compute(split: Partition, context: TaskContext): Iterator[InternalRow] = {
-    val dep = dependencies.head.asInstanceOf[ShuffleDependency[Int, InternalRow, InternalRow]]
-    SparkEnv.get.shuffleManager.getReader(dep.shuffleHandle, split.index, split.index + 1, context)
-      .read()
-      .asInstanceOf[Iterator[Product2[Int, InternalRow]]]
-      .map(_._2)
+    val shuffledRowPartition = split.asInstanceOf[ShuffledRowRDDPartition]
+    // The range of pre-shuffle partitions that we are fetching at here is
+    // [startPreShufflePartitionIndex, endPreShufflePartitionIndex - 1].
+    val reader =
+      SparkEnv.get.shuffleManager.getReader(
+        dependency.shuffleHandle,
+        shuffledRowPartition.startPreShufflePartitionIndex,
+        shuffledRowPartition.endPreShufflePartitionIndex,
+        context)
+    reader.read().asInstanceOf[Iterator[Product2[Int, InternalRow]]].map(_._2)
   }
 
   override def clearDependencies() {
     super.clearDependencies()
-    prev = null
+    dependency = null
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
new file mode 100644
index 000000000000..25f2f5caeed1
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
@@ -0,0 +1,479 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.scalatest.BeforeAndAfterAll
+
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.test.TestSQLContext
+import org.apache.spark.sql._
+import org.apache.spark.{SparkFunSuite, SparkContext, SparkConf, MapOutputStatistics}
+
+class ExchangeCoordinatorSuite extends SparkFunSuite with BeforeAndAfterAll {
+
+  private var originalActiveSQLContext: Option[SQLContext] = _
+  private var originalInstantiatedSQLContext: Option[SQLContext] = _
+
+  override protected def beforeAll(): Unit = {
+    originalActiveSQLContext = SQLContext.getActiveContextOption()
+    originalInstantiatedSQLContext = SQLContext.getInstantiatedContextOption()
+
+    SQLContext.clearActive()
+    originalInstantiatedSQLContext.foreach(ctx => SQLContext.clearInstantiatedContext(ctx))
+  }
+
+  override protected def afterAll(): Unit = {
+    // Set these states back.
+    originalActiveSQLContext.foreach(ctx => SQLContext.setActive(ctx))
+    originalInstantiatedSQLContext.foreach(ctx => SQLContext.setInstantiatedContext(ctx))
+  }
+
+  private def checkEstimation(
+      coordinator: ExchangeCoordinator,
+      bytesByPartitionIdArray: Array[Array[Long]],
+      expectedPartitionStartIndices: Array[Int]): Unit = {
+    val mapOutputStatistics = bytesByPartitionIdArray.zipWithIndex.map {
+      case (bytesByPartitionId, index) =>
+        new MapOutputStatistics(index, bytesByPartitionId)
+    }
+    val estimatedPartitionStartIndices =
+      coordinator.estimatePartitionStartIndices(mapOutputStatistics)
+    assert(estimatedPartitionStartIndices === expectedPartitionStartIndices)
+  }
+
+  test("test estimatePartitionStartIndices - 1 Exchange") {
+    val coordinator = new ExchangeCoordinator(1, 100L)
+
+    {
+      // All bytes per partition are 0.
+      val bytesByPartitionId = Array[Long](0, 0, 0, 0, 0)
+      val expectedPartitionStartIndices = Array[Int](0)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+
+    {
+      // Some bytes per partition are 0 and total size is less than the target size.
+      // 1 post-shuffle partition is needed.
+      val bytesByPartitionId = Array[Long](10, 0, 20, 0, 0)
+      val expectedPartitionStartIndices = Array[Int](0)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+
+    {
+      // 2 post-shuffle partitions are needed.
+      val bytesByPartitionId = Array[Long](10, 0, 90, 20, 0)
+      val expectedPartitionStartIndices = Array[Int](0, 3)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+
+    {
+      // There are a few large pre-shuffle partitions.
+      val bytesByPartitionId = Array[Long](110, 10, 100, 110, 0)
+      val expectedPartitionStartIndices = Array[Int](0, 1, 3, 4)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+
+    {
+      // All pre-shuffle partitions are larger than the targeted size.
+      val bytesByPartitionId = Array[Long](100, 110, 100, 110, 110)
+      val expectedPartitionStartIndices = Array[Int](0, 1, 2, 3, 4)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+
+    {
+      // The last pre-shuffle partition is in a single post-shuffle partition.
+      val bytesByPartitionId = Array[Long](30, 30, 0, 40, 110)
+      val expectedPartitionStartIndices = Array[Int](0, 4)
+      checkEstimation(coordinator, Array(bytesByPartitionId), expectedPartitionStartIndices)
+    }
+  }
+
+  test("test estimatePartitionStartIndices - 2 Exchanges") {
+    val coordinator = new ExchangeCoordinator(2, 100L)
+
+    {
+      // If there are multiple values of the number of pre-shuffle partitions,
+      // we should see an assertion error.
+      val bytesByPartitionId1 = Array[Long](0, 0, 0, 0, 0)
+      val bytesByPartitionId2 = Array[Long](0, 0, 0, 0, 0, 0)
+      val mapOutputStatistics =
+        Array(
+          new MapOutputStatistics(0, bytesByPartitionId1),
+          new MapOutputStatistics(1, bytesByPartitionId2))
+      intercept[AssertionError](coordinator.estimatePartitionStartIndices(mapOutputStatistics))
+    }
+
+    {
+      // All bytes per partition are 0.
+      val bytesByPartitionId1 = Array[Long](0, 0, 0, 0, 0)
+      val bytesByPartitionId2 = Array[Long](0, 0, 0, 0, 0)
+      val expectedPartitionStartIndices = Array[Int](0)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // Some bytes per partition are 0.
+      // 1 post-shuffle partition is needed.
+      val bytesByPartitionId1 = Array[Long](0, 10, 0, 20, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 20, 0, 20)
+      val expectedPartitionStartIndices = Array[Int](0)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // 2 post-shuffle partition are needed.
+      val bytesByPartitionId1 = Array[Long](0, 10, 0, 20, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 70, 0, 30)
+      val expectedPartitionStartIndices = Array[Int](0, 3)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // 2 post-shuffle partition are needed.
+      val bytesByPartitionId1 = Array[Long](0, 99, 0, 20, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 70, 0, 30)
+      val expectedPartitionStartIndices = Array[Int](0, 2)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // 2 post-shuffle partition are needed.
+      val bytesByPartitionId1 = Array[Long](0, 100, 0, 30, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 70, 0, 30)
+      val expectedPartitionStartIndices = Array[Int](0, 2, 4)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // There are a few large pre-shuffle partitions.
+      val bytesByPartitionId1 = Array[Long](0, 100, 40, 30, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 60, 0, 110)
+      val expectedPartitionStartIndices = Array[Int](0, 2, 3)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // All pairs of pre-shuffle partitions are larger than the targeted size.
+      val bytesByPartitionId1 = Array[Long](100, 100, 40, 30, 0)
+      val bytesByPartitionId2 = Array[Long](30, 0, 60, 70, 110)
+      val expectedPartitionStartIndices = Array[Int](0, 1, 2, 3, 4)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+  }
+
+  test("test estimatePartitionStartIndices and enforce minimal number of reducers") {
+    val coordinator = new ExchangeCoordinator(2, 100L, Some(2))
+
+    {
+      // The minimal number of post-shuffle partitions is not enforced because
+      // the size of data is 0.
+      val bytesByPartitionId1 = Array[Long](0, 0, 0, 0, 0)
+      val bytesByPartitionId2 = Array[Long](0, 0, 0, 0, 0)
+      val expectedPartitionStartIndices = Array[Int](0)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // The minimal number of post-shuffle partitions is enforced.
+      val bytesByPartitionId1 = Array[Long](10, 5, 5, 0, 20)
+      val bytesByPartitionId2 = Array[Long](5, 10, 0, 10, 5)
+      val expectedPartitionStartIndices = Array[Int](0, 3)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+
+    {
+      // The number of post-shuffle partitions is determined by the coordinator.
+      val bytesByPartitionId1 = Array[Long](10, 50, 20, 80, 20)
+      val bytesByPartitionId2 = Array[Long](40, 10, 0, 10, 30)
+      val expectedPartitionStartIndices = Array[Int](0, 2, 4)
+      checkEstimation(
+        coordinator,
+        Array(bytesByPartitionId1, bytesByPartitionId2),
+        expectedPartitionStartIndices)
+    }
+  }
+
+  ///////////////////////////////////////////////////////////////////////////
+  // Query tests
+  ///////////////////////////////////////////////////////////////////////////
+
+  val numInputPartitions: Int = 10
+
+  def checkAnswer(actual: => DataFrame, expectedAnswer: Seq[Row]): Unit = {
+    QueryTest.checkAnswer(actual, expectedAnswer) match {
+      case Some(errorMessage) => fail(errorMessage)
+      case None =>
+    }
+  }
+
+  def withSQLContext(
+      f: SQLContext => Unit,
+      targetNumPostShufflePartitions: Int,
+      minNumPostShufflePartitions: Option[Int]): Unit = {
+    val sparkConf =
+      new SparkConf(false)
+        .setMaster("local[*]")
+        .setAppName("test")
+        .set("spark.ui.enabled", "false")
+        .set("spark.driver.allowMultipleContexts", "true")
+        .set(SQLConf.SHUFFLE_PARTITIONS.key, "5")
+        .set(SQLConf.ADAPTIVE_EXECUTION_ENABLED.key, "true")
+        .set(
+          SQLConf.SHUFFLE_TARGET_POSTSHUFFLE_INPUT_SIZE.key,
+          targetNumPostShufflePartitions.toString)
+    minNumPostShufflePartitions match {
+      case Some(numPartitions) =>
+        sparkConf.set(SQLConf.SHUFFLE_MIN_NUM_POSTSHUFFLE_PARTITIONS.key, numPartitions.toString)
+      case None =>
+        sparkConf.set(SQLConf.SHUFFLE_MIN_NUM_POSTSHUFFLE_PARTITIONS.key, "-1")
+    }
+    val sparkContext = new SparkContext(sparkConf)
+    val sqlContext = new TestSQLContext(sparkContext)
+    try f(sqlContext) finally sparkContext.stop()
+  }
+
+  Seq(Some(3), None).foreach { minNumPostShufflePartitions =>
+    val testNameNote = minNumPostShufflePartitions match {
+      case Some(numPartitions) => "(minNumPostShufflePartitions: 3)"
+      case None => ""
+    }
+
+    test(s"determining the number of reducers: aggregate operator$testNameNote") {
+      val test = { sqlContext: SQLContext =>
+        val df =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 20 as key", "id as value")
+        val agg = df.groupBy("key").count
+
+        // Check the answer first.
+        checkAnswer(
+          agg,
+          sqlContext.range(0, 20).selectExpr("id", "50 as cnt").collect())
+
+        // Then, let's look at the number of post-shuffle partitions estimated
+        // by the ExchangeCoordinator.
+        val exchanges = agg.queryExecution.executedPlan.collect {
+          case e: Exchange => e
+        }
+        assert(exchanges.length === 1)
+        minNumPostShufflePartitions match {
+          case Some(numPartitions) =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 3)
+              case o =>
+            }
+
+          case None =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 2)
+              case o =>
+            }
+        }
+      }
+
+      withSQLContext(test, 1536, minNumPostShufflePartitions)
+    }
+
+    test(s"determining the number of reducers: join operator$testNameNote") {
+      val test = { sqlContext: SQLContext =>
+        val df1 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key1", "id as value1")
+        val df2 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key2", "id as value2")
+
+        val join = df1.join(df2, col("key1") === col("key2")).select(col("key1"), col("value2"))
+
+        // Check the answer first.
+        val expectedAnswer =
+          sqlContext
+            .range(0, 1000)
+            .selectExpr("id % 500 as key", "id as value")
+            .unionAll(sqlContext.range(0, 1000).selectExpr("id % 500 as key", "id as value"))
+        checkAnswer(
+          join,
+          expectedAnswer.collect())
+
+        // Then, let's look at the number of post-shuffle partitions estimated
+        // by the ExchangeCoordinator.
+        val exchanges = join.queryExecution.executedPlan.collect {
+          case e: Exchange => e
+        }
+        assert(exchanges.length === 2)
+        minNumPostShufflePartitions match {
+          case Some(numPartitions) =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 3)
+              case o =>
+            }
+
+          case None =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 2)
+              case o =>
+            }
+        }
+      }
+
+      withSQLContext(test, 16384, minNumPostShufflePartitions)
+    }
+
+    test(s"determining the number of reducers: complex query 1$testNameNote") {
+      val test = { sqlContext: SQLContext =>
+        val df1 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key1", "id as value1")
+            .groupBy("key1")
+            .count
+            .toDF("key1", "cnt1")
+        val df2 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key2", "id as value2")
+            .groupBy("key2")
+            .count
+            .toDF("key2", "cnt2")
+
+        val join = df1.join(df2, col("key1") === col("key2")).select(col("key1"), col("cnt2"))
+
+        // Check the answer first.
+        val expectedAnswer =
+          sqlContext
+            .range(0, 500)
+            .selectExpr("id", "2 as cnt")
+        checkAnswer(
+          join,
+          expectedAnswer.collect())
+
+        // Then, let's look at the number of post-shuffle partitions estimated
+        // by the ExchangeCoordinator.
+        val exchanges = join.queryExecution.executedPlan.collect {
+          case e: Exchange => e
+        }
+        assert(exchanges.length === 4)
+        minNumPostShufflePartitions match {
+          case Some(numPartitions) =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 3)
+              case o =>
+            }
+
+          case None =>
+            assert(exchanges.forall(_.coordinator.isDefined))
+            assert(exchanges.map(_.outputPartitioning.numPartitions).toSeq.toSet === Set(1, 2))
+        }
+      }
+
+      withSQLContext(test, 6144, minNumPostShufflePartitions)
+    }
+
+    test(s"determining the number of reducers: complex query 2$testNameNote") {
+      val test = { sqlContext: SQLContext =>
+        val df1 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key1", "id as value1")
+            .groupBy("key1")
+            .count
+            .toDF("key1", "cnt1")
+        val df2 =
+          sqlContext
+            .range(0, 1000, 1, numInputPartitions)
+            .selectExpr("id % 500 as key2", "id as value2")
+
+        val join =
+          df1
+            .join(df2, col("key1") === col("key2"))
+            .select(col("key1"), col("cnt1"), col("value2"))
+
+        // Check the answer first.
+        val expectedAnswer =
+          sqlContext
+            .range(0, 1000)
+            .selectExpr("id % 500 as key", "2 as cnt", "id as value")
+        checkAnswer(
+          join,
+          expectedAnswer.collect())
+
+        // Then, let's look at the number of post-shuffle partitions estimated
+        // by the ExchangeCoordinator.
+        val exchanges = join.queryExecution.executedPlan.collect {
+          case e: Exchange => e
+        }
+        assert(exchanges.length === 3)
+        minNumPostShufflePartitions match {
+          case Some(numPartitions) =>
+            exchanges.foreach {
+              case e: Exchange =>
+                assert(e.coordinator.isDefined)
+                assert(e.outputPartitioning.numPartitions === 3)
+              case o =>
+            }
+
+          case None =>
+            assert(exchanges.forall(_.coordinator.isDefined))
+            assert(exchanges.map(_.outputPartitioning.numPartitions).toSeq.toSet === Set(2, 3))
+        }
+      }
+
+      withSQLContext(test, 6144, minNumPostShufflePartitions)
+    }
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index ebdab1c26d7b..2076c573b56c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -268,7 +268,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case Exchange(_, _) => true }.isEmpty) {
+    if (outputPlan.collect { case e: Exchange => true }.isEmpty) {
       fail(s"Exchange should have been added:\n$outputPlan")
     }
   }
@@ -306,7 +306,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case Exchange(_, _) => true }.isEmpty) {
+    if (outputPlan.collect { case e: Exchange => true }.isEmpty) {
       fail(s"Exchange should have been added:\n$outputPlan")
     }
   }
@@ -326,7 +326,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case Exchange(_, _) => true }.nonEmpty) {
+    if (outputPlan.collect { case e: Exchange => true }.nonEmpty) {
       fail(s"Exchange should not have been added:\n$outputPlan")
     }
   }
@@ -349,7 +349,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case Exchange(_, _) => true }.nonEmpty) {
+    if (outputPlan.collect { case e: Exchange => true }.nonEmpty) {
       fail(s"No Exchanges should have been added:\n$outputPlan")
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
index d32572b54b8a..09e258299de5 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeRowSerializerSuite.scala
@@ -152,7 +152,12 @@ class UnsafeRowSerializerSuite extends SparkFunSuite with LocalSparkContext {
     val unsafeRow = toUnsafeRow(row, Array(StringType, IntegerType))
     val rowsRDD = sc.parallelize(Seq((0, unsafeRow), (1, unsafeRow), (0, unsafeRow)))
       .asInstanceOf[RDD[Product2[Int, InternalRow]]]
-    val shuffled = new ShuffledRowRDD(rowsRDD, new UnsafeRowSerializer(2), 2)
+    val dependency =
+      new ShuffleDependency[Int, InternalRow, InternalRow](
+        rowsRDD,
+        new PartitionIdPassthrough(2),
+        Some(new UnsafeRowSerializer(2)))
+    val shuffled = new ShuffledRowRDD(dependency)
     shuffled.count()
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
index da58e96f3e6f..066c16e535c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
@@ -49,7 +49,16 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
       Row(null, "e")
     )), new StructType().add("n", IntegerType).add("l", StringType))
 
-  private lazy val myTestData = Seq(
+  private lazy val myTestData1 = Seq(
+    (1, 1),
+    (1, 2),
+    (2, 1),
+    (2, 2),
+    (3, 1),
+    (3, 2)
+  ).toDF("a", "b")
+
+  private lazy val myTestData2 = Seq(
     (1, 1),
     (1, 2),
     (2, 1),
@@ -184,8 +193,8 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
   )
 
   {
-    lazy val left = myTestData.where("a = 1")
-    lazy val right = myTestData.where("a = 1")
+    lazy val left = myTestData1.where("a = 1")
+    lazy val right = myTestData2.where("a = 1")
     testInnerJoin(
       "inner join, multiple matches",
       left,
@@ -201,8 +210,8 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
   }
 
   {
-    lazy val left = myTestData.where("a = 1")
-    lazy val right = myTestData.where("a = 2")
+    lazy val left = myTestData1.where("a = 1")
+    lazy val right = myTestData2.where("a = 2")
     testInnerJoin(
       "inner join, no matches",
       left,

From 67e23b39ac3cdee06668fa9131951278b9731e29 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 3 Nov 2015 11:42:08 +0100
Subject: [PATCH 460/896] [SPARK-10429] [SQL] make mutableProjection atomic

Right now, SQL's mutable projection updates every value of the mutable project after it evaluates the corresponding expression. This makes the behavior of MutableProjection confusing and complicate the implementation of common aggregate functions like stddev because developers need to be aware that when evaluating {{i+1}}th expression of a mutable projection, {{i}}th slot of the mutable row has already been updated.

This PR make the MutableProjection atomic, by generating all the results of expressions first, then copy them into mutableRow.

Had run a mircro-benchmark, there is no notable performance difference between using class members and local variables.

cc yhuai

Author: Davies Liu <davies@databricks.com>

Closes #9422 from davies/atomic_mutable and squashes the following commits:

bbc1758 [Davies Liu] support wide table
8a0ae14 [Davies Liu] fix bug
bec07da [Davies Liu] refactor
2891628 [Davies Liu] make mutableProjection atomic
---
 .../sql/catalyst/expressions/Projection.scala |  13 +-
 .../expressions/aggregate/functions.scala     | 154 ++++++++----------
 .../codegen/GenerateMutableProjection.scala   |  28 +++-
 3 files changed, 97 insertions(+), 98 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
index afe52e6a667e..a6fe730f6dad 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
@@ -19,8 +19,7 @@ package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
-import org.apache.spark.sql.types.{DataType, Decimal, StructType, _}
-import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
+import org.apache.spark.sql.types.{DataType, StructType}
 
 /**
  * A [[Projection]] that is calculated by calling the `eval` of each of the specified expressions.
@@ -62,6 +61,8 @@ case class InterpretedMutableProjection(expressions: Seq[Expression]) extends Mu
   def this(expressions: Seq[Expression], inputSchema: Seq[Attribute]) =
     this(expressions.map(BindReferences.bindReference(_, inputSchema)))
 
+  private[this] val buffer = new Array[Any](expressions.size)
+
   expressions.foreach(_.foreach {
     case n: Nondeterministic => n.setInitialValues()
     case _ =>
@@ -79,7 +80,13 @@ case class InterpretedMutableProjection(expressions: Seq[Expression]) extends Mu
   override def apply(input: InternalRow): InternalRow = {
     var i = 0
     while (i < exprArray.length) {
-      mutableRow(i) = exprArray(i).eval(input)
+      // Store the result into buffer first, to make the projection atomic (needed by aggregation)
+      buffer(i) = exprArray(i).eval(input)
+      i += 1
+    }
+    i = 0
+    while (i < exprArray.length) {
+      mutableRow(i) = buffer(i)
       i += 1
     }
     mutableRow
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index 5d2eb7b017ab..f2c3eca09511 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -57,37 +57,37 @@ case class Average(child: Expression) extends DeclarativeAggregate {
     case _ => DoubleType
   }
 
-  private val currentSum = AttributeReference("currentSum", sumDataType)()
-  private val currentCount = AttributeReference("currentCount", LongType)()
+  private val sum = AttributeReference("sum", sumDataType)()
+  private val count = AttributeReference("count", LongType)()
 
-  override val aggBufferAttributes = currentSum :: currentCount :: Nil
+  override val aggBufferAttributes = sum :: count :: Nil
 
   override val initialValues = Seq(
-    /* currentSum = */ Cast(Literal(0), sumDataType),
-    /* currentCount = */ Literal(0L)
+    /* sum = */ Cast(Literal(0), sumDataType),
+    /* count = */ Literal(0L)
   )
 
   override val updateExpressions = Seq(
-    /* currentSum = */
+    /* sum = */
     Add(
-      currentSum,
+      sum,
       Coalesce(Cast(child, sumDataType) :: Cast(Literal(0), sumDataType) :: Nil)),
-    /* currentCount = */ If(IsNull(child), currentCount, currentCount + 1L)
+    /* count = */ If(IsNull(child), count, count + 1L)
   )
 
   override val mergeExpressions = Seq(
-    /* currentSum = */ currentSum.left + currentSum.right,
-    /* currentCount = */ currentCount.left + currentCount.right
+    /* sum = */ sum.left + sum.right,
+    /* count = */ count.left + count.right
   )
 
-  // If all input are nulls, currentCount will be 0 and we will get null after the division.
+  // If all input are nulls, count will be 0 and we will get null after the division.
   override val evaluateExpression = child.dataType match {
     case DecimalType.Fixed(p, s) =>
       // increase the precision and scale to prevent precision loss
       val dt = DecimalType.bounded(p + 14, s + 4)
-      Cast(Cast(currentSum, dt) / Cast(currentCount, dt), resultType)
+      Cast(Cast(sum, dt) / Cast(count, dt), resultType)
     case _ =>
-      Cast(currentSum, resultType) / Cast(currentCount, resultType)
+      Cast(sum, resultType) / Cast(count, resultType)
   }
 }
 
@@ -102,23 +102,23 @@ case class Count(child: Expression) extends DeclarativeAggregate {
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val currentCount = AttributeReference("currentCount", LongType)()
+  private val count = AttributeReference("count", LongType)()
 
-  override val aggBufferAttributes = currentCount :: Nil
+  override val aggBufferAttributes = count :: Nil
 
   override val initialValues = Seq(
-    /* currentCount = */ Literal(0L)
+    /* count = */ Literal(0L)
   )
 
   override val updateExpressions = Seq(
-    /* currentCount = */ If(IsNull(child), currentCount, currentCount + 1L)
+    /* count = */ If(IsNull(child), count, count + 1L)
   )
 
   override val mergeExpressions = Seq(
-    /* currentCount = */ currentCount.left + currentCount.right
+    /* count = */ count.left + count.right
   )
 
-  override val evaluateExpression = Cast(currentCount, LongType)
+  override val evaluateExpression = Cast(count, LongType)
 }
 
 /**
@@ -372,101 +372,77 @@ abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
 
   private val resultType = DoubleType
 
-  private val preCount = AttributeReference("preCount", resultType)()
-  private val currentCount = AttributeReference("currentCount", resultType)()
-  private val preAvg = AttributeReference("preAvg", resultType)()
-  private val currentAvg = AttributeReference("currentAvg", resultType)()
-  private val currentMk = AttributeReference("currentMk", resultType)()
+  private val count = AttributeReference("count", resultType)()
+  private val avg = AttributeReference("avg", resultType)()
+  private val mk = AttributeReference("mk", resultType)()
 
-  override val aggBufferAttributes = preCount :: currentCount :: preAvg ::
-                                  currentAvg :: currentMk :: Nil
+  override val aggBufferAttributes = count :: avg :: mk :: Nil
 
   override val initialValues = Seq(
-    /* preCount = */ Cast(Literal(0), resultType),
-    /* currentCount = */ Cast(Literal(0), resultType),
-    /* preAvg = */ Cast(Literal(0), resultType),
-    /* currentAvg = */ Cast(Literal(0), resultType),
-    /* currentMk = */ Cast(Literal(0), resultType)
+    /* count = */ Cast(Literal(0), resultType),
+    /* avg = */ Cast(Literal(0), resultType),
+    /* mk = */ Cast(Literal(0), resultType)
   )
 
   override val updateExpressions = {
+    val value = Cast(child, resultType)
+    val newCount = count + Cast(Literal(1), resultType)
 
     // update average
     // avg = avg + (value - avg)/count
-    def avgAdd: Expression = {
-      currentAvg + ((Cast(child, resultType) - currentAvg) / currentCount)
-    }
+    val newAvg = avg + (value - avg) / newCount
 
     // update sum of square of difference from mean
     // Mk = Mk + (value - preAvg) * (value - updatedAvg)
-    def mkAdd: Expression = {
-      val delta1 = Cast(child, resultType) - preAvg
-      val delta2 = Cast(child, resultType) - currentAvg
-      currentMk + (delta1 * delta2)
-    }
+    val newMk = mk + (value - avg) * (value - newAvg)
 
     Seq(
-      /* preCount = */ If(IsNull(child), preCount, currentCount),
-      /* currentCount = */ If(IsNull(child), currentCount,
-                           Add(currentCount, Cast(Literal(1), resultType))),
-      /* preAvg = */ If(IsNull(child), preAvg, currentAvg),
-      /* currentAvg = */ If(IsNull(child), currentAvg, avgAdd),
-      /* currentMk = */ If(IsNull(child), currentMk, mkAdd)
+      /* count = */ If(IsNull(child), count, newCount),
+      /* avg = */ If(IsNull(child), avg, newAvg),
+      /* mk = */ If(IsNull(child), mk, newMk)
     )
   }
 
   override val mergeExpressions = {
 
     // count merge
-    def countMerge: Expression = {
-      currentCount.left + currentCount.right
-    }
+    val newCount = count.left + count.right
 
     // average merge
-    def avgMerge: Expression = {
-      ((currentAvg.left * preCount) + (currentAvg.right * currentCount.right)) /
-      (preCount + currentCount.right)
-    }
+    val newAvg = ((avg.left * count.left) + (avg.right * count.right)) / newCount
 
     // update sum of square differences
-    def mkMerge: Expression = {
-      val avgDelta = currentAvg.right - preAvg
-      val mkDelta = (avgDelta * avgDelta) * (preCount * currentCount.right) /
-        (preCount + currentCount.right)
-
-      currentMk.left + currentMk.right + mkDelta
+    val newMk = {
+      val avgDelta = avg.right - avg.left
+      val mkDelta = (avgDelta * avgDelta) * (count.left * count.right) / newCount
+      mk.left + mk.right + mkDelta
     }
 
     Seq(
-      /* preCount = */ If(IsNull(currentCount.left),
-                         Cast(Literal(0), resultType), currentCount.left),
-      /* currentCount = */ If(IsNull(currentCount.left), currentCount.right,
-                             If(IsNull(currentCount.right), currentCount.left, countMerge)),
-      /* preAvg = */ If(IsNull(currentAvg.left), Cast(Literal(0), resultType), currentAvg.left),
-      /* currentAvg = */ If(IsNull(currentAvg.left), currentAvg.right,
-                           If(IsNull(currentAvg.right), currentAvg.left, avgMerge)),
-      /* currentMk = */ If(IsNull(currentMk.left), currentMk.right,
-                          If(IsNull(currentMk.right), currentMk.left, mkMerge))
+      /* count = */ If(IsNull(count.left), count.right,
+                       If(IsNull(count.right), count.left, newCount)),
+      /* avg = */ If(IsNull(avg.left), avg.right,
+                     If(IsNull(avg.right), avg.left, newAvg)),
+      /* mk = */ If(IsNull(mk.left), mk.right,
+                    If(IsNull(mk.right), mk.left, newMk))
     )
   }
 
   override val evaluateExpression = {
-    // when currentCount == 0, return null
-    // when currentCount == 1, return 0
-    // when currentCount >1
-    // stddev_samp = sqrt (currentMk/(currentCount -1))
-    // stddev_pop = sqrt (currentMk/currentCount)
-    val varCol = {
+    // when count == 0, return null
+    // when count == 1, return 0
+    // when count >1
+    // stddev_samp = sqrt (mk/(count -1))
+    // stddev_pop = sqrt (mk/count)
+    val varCol =
       if (isSample) {
-        currentMk / Cast((currentCount - Cast(Literal(1), resultType)), resultType)
-      }
-      else {
-        currentMk / currentCount
+        mk / Cast((count - Cast(Literal(1), resultType)), resultType)
+      } else {
+        mk / count
       }
-    }
 
-    If(EqualTo(currentCount, Cast(Literal(0), resultType)), Cast(Literal(null), resultType),
-      If(EqualTo(currentCount, Cast(Literal(1), resultType)), Cast(Literal(0), resultType),
+    If(EqualTo(count, Cast(Literal(0), resultType)), Cast(Literal(null), resultType),
+      If(EqualTo(count, Cast(Literal(1), resultType)), Cast(Literal(0), resultType),
         Cast(Sqrt(varCol), resultType)))
   }
 }
@@ -499,30 +475,30 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
 
   private val sumDataType = resultType
 
-  private val currentSum = AttributeReference("currentSum", sumDataType)()
+  private val sum = AttributeReference("sum", sumDataType)()
 
   private val zero = Cast(Literal(0), sumDataType)
 
-  override val aggBufferAttributes = currentSum :: Nil
+  override val aggBufferAttributes = sum :: Nil
 
   override val initialValues = Seq(
-    /* currentSum = */ Literal.create(null, sumDataType)
+    /* sum = */ Literal.create(null, sumDataType)
   )
 
   override val updateExpressions = Seq(
-    /* currentSum = */
-    Coalesce(Seq(Add(Coalesce(Seq(currentSum, zero)), Cast(child, sumDataType)), currentSum))
+    /* sum = */
+    Coalesce(Seq(Add(Coalesce(Seq(sum, zero)), Cast(child, sumDataType)), sum))
   )
 
   override val mergeExpressions = {
-    val add = Add(Coalesce(Seq(currentSum.left, zero)), Cast(currentSum.right, sumDataType))
+    val add = Add(Coalesce(Seq(sum.left, zero)), Cast(sum.right, sumDataType))
     Seq(
-      /* currentSum = */
-      Coalesce(Seq(add, currentSum.left))
+      /* sum = */
+      Coalesce(Seq(add, sum.left))
     )
   }
 
-  override val evaluateExpression = Cast(currentSum, resultType)
+  override val evaluateExpression = Cast(sum, resultType)
 }
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
index e8ee64756d5d..4b66069b5f55 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
@@ -44,28 +44,42 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
       case (NoOp, _) => ""
       case (e, i) =>
         val evaluationCode = e.gen(ctx)
+        val isNull = s"isNull_$i"
+        val value = s"value_$i"
+        ctx.addMutableState("boolean", isNull, s"this.$isNull = true;")
+        ctx.addMutableState(ctx.javaType(e.dataType), value,
+          s"this.$value = ${ctx.defaultValue(e.dataType)};")
+        s"""
+          ${evaluationCode.code}
+          this.$isNull = ${evaluationCode.isNull};
+          this.$value = ${evaluationCode.value};
+         """
+    }
+    val updates = expressions.zipWithIndex.map {
+      case (NoOp, _) => ""
+      case (e, i) =>
         if (e.dataType.isInstanceOf[DecimalType]) {
           // Can't call setNullAt on DecimalType, because we need to keep the offset
           s"""
-            ${evaluationCode.code}
-            if (${evaluationCode.isNull}) {
+            if (this.isNull_$i) {
               ${ctx.setColumn("mutableRow", e.dataType, i, null)};
             } else {
-              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.value)};
+              ${ctx.setColumn("mutableRow", e.dataType, i, s"this.value_$i")};
             }
           """
         } else {
           s"""
-            ${evaluationCode.code}
-            if (${evaluationCode.isNull}) {
+            if (this.isNull_$i) {
               mutableRow.setNullAt($i);
             } else {
-              ${ctx.setColumn("mutableRow", e.dataType, i, evaluationCode.value)};
+              ${ctx.setColumn("mutableRow", e.dataType, i, s"this.value_$i")};
             }
           """
         }
     }
+
     val allProjections = ctx.splitExpressions(ctx.INPUT_ROW, projectionCodes)
+    val allUpdates = ctx.splitExpressions(ctx.INPUT_ROW, updates)
 
     val code = s"""
       public Object generate($exprType[] expr) {
@@ -98,6 +112,8 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
         public Object apply(Object _i) {
           InternalRow ${ctx.INPUT_ROW} = (InternalRow) _i;
           $allProjections
+          // copy all the results into MutableRow
+          $allUpdates
           return mutableRow;
         }
       }

From 425ff03f5ac4f3ddda1ba06656e620d5426f4209 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 3 Nov 2015 12:47:39 +0100
Subject: [PATCH 461/896] [SPARK-11436] [SQL] rebind right encoder when join 2
 datasets

When we join 2 datasets, we will combine 2 encoders into a tupled one, and use it as the encoder for the jioned dataset. Assume both of the 2 encoders are flat, their `constructExpression`s both reference to the first element of input row. However, when we combine 2 encoders, the schema of input row changed,  now the right encoder should reference to second element of input row. So we should rebind right encoder to let it know the new schema of input row before combine it.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9391 from cloud-fan/join and squashes the following commits:

846d3ab [Wenchen Fan] rebind right encoder when join 2 datasets
---
 .../src/main/scala/org/apache/spark/sql/Dataset.scala     | 4 +++-
 .../test/scala/org/apache/spark/sql/DatasetSuite.scala    | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index e0ab5f593e93..ed98a2541598 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -390,7 +390,9 @@ class Dataset[T] private(
     val rightEncoder =
       if (other.encoder.flat) other.encoder else other.encoder.nested(rightData.toAttribute)
     implicit val tuple2Encoder: Encoder[(T, U)] =
-      ExpressionEncoder.tuple(leftEncoder, rightEncoder)
+      ExpressionEncoder.tuple(
+        leftEncoder,
+        rightEncoder.rebind(right.output, left.output ++ right.output))
 
     withPlan[(T, U)](other) { (left, right) =>
       Project(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 993e6d269ee0..95b8d05cf441 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -214,4 +214,12 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       cogrouped,
       1 -> "a#", 2 -> "#q", 3 -> "abcfoo#w", 5 -> "hello#er")
   }
+
+  test("SPARK-11436: we should rebind right encoder when join 2 datasets") {
+    val ds1 = Seq("1", "2").toDS().as("a")
+    val ds2 = Seq(2, 3).toDS().as("b")
+
+    val joined = ds1.joinWith(ds2, $"a.value" === $"b.value")
+    checkAnswer(joined, ("2", 2))
+  }
 }

From b86f2cab67989f09ba1ba8604e52cd4b1e44e436 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Tue, 3 Nov 2015 13:02:17 +0100
Subject: [PATCH 462/896] [SPARK-11404] [SQL] Support for groupBy using column
 expressions

This PR adds a new method `groupBy(cols: Column*)` to `Dataset` that allows users to group using column expressions instead of a lambda function.  Since the return type of these expressions is not known at compile time, we just set the key type as a generic `Row`.  If the user would like to work the key in a type-safe way, they can call `grouped.asKey[Type]`, which is also added in this PR.

```scala
val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
val grouped = ds.groupBy($"_1").asKey[String]
val agged = grouped.mapGroups { case (g, iter) =>
  Iterator((g, iter.map(_._2).sum))
}

agged.collect()

res0: Array(("a", 30), ("b", 3), ("c", 1))
```

Author: Michael Armbrust <michael@databricks.com>

Closes #9359 from marmbrus/columnGroupBy and squashes the following commits:

bbcb03b [Michael Armbrust] Update DatasetSuite.scala
8fd2908 [Michael Armbrust] Update DatasetSuite.scala
0b0e2f8 [Michael Armbrust] [SPARK-11404] [SQL] Support for groupBy using column expressions
---
 .../scala/org/apache/spark/sql/Dataset.scala  | 36 ++++++++++++--
 .../org/apache/spark/sql/GroupedDataset.scala | 28 +++++++++--
 .../org/apache/spark/sql/DatasetSuite.scala   | 48 +++++++++++++++++++
 3 files changed, 106 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index ed98a2541598..7b75aeec4cf3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.Inner
@@ -78,9 +79,17 @@ class Dataset[T] private(
    * ************* */
 
   /**
-   * Returns a new `Dataset` where each record has been mapped on to the specified type.
-   * TODO: should bind here...
-   * TODO: document binding rules
+   * Returns a new `Dataset` where each record has been mapped on to the specified type.  The
+   * method used to map columns depend on the type of `U`:
+   *  - When `U` is a class, fields for the class will be mapped to columns of the same name
+   *    (case sensitivity is determined by `spark.sql.caseSensitive`)
+   *  - When `U` is a tuple, the columns will be be mapped by ordinal (i.e. the first column will
+   *    be assigned to `_1`).
+   *  - When `U` is a primitive type (i.e. String, Int, etc). then the first column of the
+   *    [[DataFrame]] will be used.
+   *
+   * If the schema of the [[DataFrame]] does not match the desired `U` type, you can use `select`
+   * along with `alias` or `as` to rearrange or rename as required.
    * @since 1.6.0
    */
   def as[U : Encoder]: Dataset[U] = {
@@ -225,6 +234,27 @@ class Dataset[T] private(
       withGroupingKey.newColumns)
   }
 
+  /**
+   * Returns a [[GroupedDataset]] where the data is grouped by the given [[Column]] expressions.
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def groupBy(cols: Column*): GroupedDataset[Row, T] = {
+    val withKeyColumns = logicalPlan.output ++ cols.map(_.expr).map(UnresolvedAlias)
+    val withKey = Project(withKeyColumns, logicalPlan)
+    val executed = sqlContext.executePlan(withKey)
+
+    val dataAttributes = executed.analyzed.output.dropRight(cols.size)
+    val keyAttributes = executed.analyzed.output.takeRight(cols.size)
+
+    new GroupedDataset(
+      RowEncoder(keyAttributes.toStructType),
+      encoderFor[T],
+      executed,
+      dataAttributes,
+      keyAttributes)
+  }
+
   /* ****************** *
    *  Typed Relational  *
    * ****************** */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 612f2b60cd40..96d6e9dd548e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql
 
-import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
@@ -34,11 +34,33 @@ class GroupedDataset[K, T] private[sql](
     private val dataAttributes: Seq[Attribute],
     private val groupingAttributes: Seq[Attribute]) extends Serializable {
 
-  private implicit def kEnc = kEncoder
-  private implicit def tEnc = tEncoder
+  private implicit val kEnc = kEncoder match {
+    case e: ExpressionEncoder[K] => e.resolve(groupingAttributes)
+    case other =>
+      throw new UnsupportedOperationException("Only expression encoders are currently supported")
+  }
+
+  private implicit val tEnc = tEncoder match {
+    case e: ExpressionEncoder[T] => e.resolve(dataAttributes)
+    case other =>
+      throw new UnsupportedOperationException("Only expression encoders are currently supported")
+  }
+
   private def logicalPlan = queryExecution.analyzed
   private def sqlContext = queryExecution.sqlContext
 
+  /**
+   * Returns a new [[GroupedDataset]] where the type of the key has been mapped to the specified
+   * type. The mapping of key columns to the type follows the same rules as `as` on [[Dataset]].
+   */
+  def asKey[L : Encoder]: GroupedDataset[L, T] =
+    new GroupedDataset(
+      encoderFor[L],
+      tEncoder,
+      queryExecution,
+      dataAttributes,
+      groupingAttributes)
+
   /**
    * Returns a [[Dataset]] that contains each unique key.
    */
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 95b8d05cf441..5973fa7f2a76 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -203,6 +203,54 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       ("a", 30), ("b", 3), ("c", 1))
   }
 
+  test("groupBy columns, mapGroups") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy($"_1")
+    val agged = grouped.mapGroups { case (g, iter) =>
+      Iterator((g.getString(0), iter.map(_._2).sum))
+    }
+
+    checkAnswer(
+      agged,
+      ("a", 30), ("b", 3), ("c", 1))
+  }
+
+  test("groupBy columns asKey, mapGroups") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy($"_1").asKey[String]
+    val agged = grouped.mapGroups { case (g, iter) =>
+      Iterator((g, iter.map(_._2).sum))
+    }
+
+    checkAnswer(
+      agged,
+      ("a", 30), ("b", 3), ("c", 1))
+  }
+
+  test("groupBy columns asKey tuple, mapGroups") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy($"_1", lit(1)).asKey[(String, Int)]
+    val agged = grouped.mapGroups { case (g, iter) =>
+      Iterator((g, iter.map(_._2).sum))
+    }
+
+    checkAnswer(
+      agged,
+      (("a", 1), 30), (("b", 1), 3), (("c", 1), 1))
+  }
+
+  test("groupBy columns asKey class, mapGroups") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy($"_1".as("a"), lit(1).as("b")).asKey[ClassData]
+    val agged = grouped.mapGroups { case (g, iter) =>
+      Iterator((g, iter.map(_._2).sum))
+    }
+
+    checkAnswer(
+      agged,
+      (ClassData("a", 1), 30), (ClassData("b", 1), 3), (ClassData("c", 1), 1))
+  }
+
   test("cogroup") {
     val ds1 = Seq(1 -> "a", 3 -> "abc", 5 -> "hello", 3 -> "foo").toDS()
     val ds2 = Seq(2 -> "q", 3 -> "w", 5 -> "e", 5 -> "r").toDS()

From 233e534ac43ea25ac1b0e6a985f6928d46c5d03a Mon Sep 17 00:00:00 2001
From: Jacek Lewandowski <lewandowski.jacek@gmail.com>
Date: Tue, 3 Nov 2015 12:46:11 +0000
Subject: [PATCH 463/896] [SPARK-11344] Made ApplicationDescription and
 DriverDescription case classes

DriverDescription refactored to case class because it included no mutable fields.

ApplicationDescription had one mutable field, which was appUiUrl. This field was set by the driver to point to the driver web UI. Master was modifying this field when the application was removed to redirect requests to history server. This was wrong because objects which are sent over the wire should be immutable. Now appUiUrl is immutable in ApplicationDescription and always points to the driver UI even if it is already shutdown. The UI url which master exposes to the user and modifies dynamically is now included into ApplicationInfo - a data object which describes the application state internally in master. That URL in ApplicationInfo is initialised with the value from ApplicationDescription.

ApplicationDescription also included value user, which is now a part of case class fields.

Author: Jacek Lewandowski <lewandowski.jacek@gmail.com>

Closes #9299 from jacek-lewandowski/SPARK-11344.
---
 .../spark/deploy/ApplicationDescription.scala | 33 ++++++-------------
 .../spark/deploy/DriverDescription.scala      | 21 ++++--------
 .../spark/deploy/master/ApplicationInfo.scala |  7 ++++
 .../apache/spark/deploy/master/Master.scala   | 12 ++++---
 .../deploy/master/ui/ApplicationPage.scala    |  2 +-
 .../spark/deploy/master/ui/MasterPage.scala   |  2 +-
 .../apache/spark/deploy/DeployTestUtils.scala |  3 +-
 7 files changed, 34 insertions(+), 46 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/ApplicationDescription.scala b/core/src/main/scala/org/apache/spark/deploy/ApplicationDescription.scala
index ae99432f5ce8..78bbd5c03f4a 100644
--- a/core/src/main/scala/org/apache/spark/deploy/ApplicationDescription.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/ApplicationDescription.scala
@@ -19,30 +19,17 @@ package org.apache.spark.deploy
 
 import java.net.URI
 
-private[spark] class ApplicationDescription(
-    val name: String,
-    val maxCores: Option[Int],
-    val memoryPerExecutorMB: Int,
-    val command: Command,
-    var appUiUrl: String,
-    val eventLogDir: Option[URI] = None,
+private[spark] case class ApplicationDescription(
+    name: String,
+    maxCores: Option[Int],
+    memoryPerExecutorMB: Int,
+    command: Command,
+    appUiUrl: String,
+    eventLogDir: Option[URI] = None,
     // short name of compression codec used when writing event logs, if any (e.g. lzf)
-    val eventLogCodec: Option[String] = None,
-    val coresPerExecutor: Option[Int] = None)
-  extends Serializable {
-
-  val user = System.getProperty("user.name", "<unknown>")
-
-  def copy(
-      name: String = name,
-      maxCores: Option[Int] = maxCores,
-      memoryPerExecutorMB: Int = memoryPerExecutorMB,
-      command: Command = command,
-      appUiUrl: String = appUiUrl,
-      eventLogDir: Option[URI] = eventLogDir,
-      eventLogCodec: Option[String] = eventLogCodec): ApplicationDescription =
-    new ApplicationDescription(
-      name, maxCores, memoryPerExecutorMB, command, appUiUrl, eventLogDir, eventLogCodec)
+    eventLogCodec: Option[String] = None,
+    coresPerExecutor: Option[Int] = None,
+    user: String = System.getProperty("user.name", "<unknown>")) {
 
   override def toString: String = "ApplicationDescription(" + name + ")"
 }
diff --git a/core/src/main/scala/org/apache/spark/deploy/DriverDescription.scala b/core/src/main/scala/org/apache/spark/deploy/DriverDescription.scala
index 659fb434a80f..1f5626ab5a89 100644
--- a/core/src/main/scala/org/apache/spark/deploy/DriverDescription.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/DriverDescription.scala
@@ -17,21 +17,12 @@
 
 package org.apache.spark.deploy
 
-private[deploy] class DriverDescription(
-    val jarUrl: String,
-    val mem: Int,
-    val cores: Int,
-    val supervise: Boolean,
-    val command: Command)
-  extends Serializable {
-
-  def copy(
-      jarUrl: String = jarUrl,
-      mem: Int = mem,
-      cores: Int = cores,
-      supervise: Boolean = supervise,
-      command: Command = command): DriverDescription =
-    new DriverDescription(jarUrl, mem, cores, supervise, command)
+private[deploy] case class DriverDescription(
+    jarUrl: String,
+    mem: Int,
+    cores: Int,
+    supervise: Boolean,
+    command: Command) {
 
   override def toString: String = s"DriverDescription (${command.mainClass})"
 }
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/ApplicationInfo.scala b/core/src/main/scala/org/apache/spark/deploy/master/ApplicationInfo.scala
index b40d20f9f786..ac553b71115d 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/ApplicationInfo.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/ApplicationInfo.scala
@@ -41,6 +41,7 @@ private[spark] class ApplicationInfo(
   @transient var coresGranted: Int = _
   @transient var endTime: Long = _
   @transient var appSource: ApplicationSource = _
+  @transient @volatile var appUIUrlAtHistoryServer: Option[String] = None
 
   // A cap on the number of executors this application can have at any given time.
   // By default, this is infinite. Only after the first allocation request is issued by the
@@ -135,4 +136,10 @@ private[spark] class ApplicationInfo(
     }
   }
 
+  /**
+   * Returns the original application UI url unless there is its address at history server
+   * is defined
+   */
+  def curAppUIUrl: String = appUIUrlAtHistoryServer.getOrElse(desc.appUiUrl)
+
 }
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
index 6715d6c70f49..b25a487806c7 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/Master.scala
@@ -768,7 +768,8 @@ private[deploy] class Master(
       ApplicationInfo = {
     val now = System.currentTimeMillis()
     val date = new Date(now)
-    new ApplicationInfo(now, newApplicationId(date), desc, date, driver, defaultCores)
+    val appId = newApplicationId(date)
+    new ApplicationInfo(now, appId, desc, date, driver, defaultCores)
   }
 
   private def registerApplication(app: ApplicationInfo): Unit = {
@@ -920,7 +921,7 @@ private[deploy] class Master(
       val eventLogDir = app.desc.eventLogDir
         .getOrElse {
           // Event logging is not enabled for this application
-          app.desc.appUiUrl = notFoundBasePath
+          app.appUIUrlAtHistoryServer = Some(notFoundBasePath)
           return None
         }
 
@@ -954,7 +955,7 @@ private[deploy] class Master(
       appIdToUI(app.id) = ui
       webUi.attachSparkUI(ui)
       // Application UI is successfully rebuilt, so link the Master UI to it
-      app.desc.appUiUrl = ui.basePath
+      app.appUIUrlAtHistoryServer = Some(ui.basePath)
       Some(ui)
     } catch {
       case fnf: FileNotFoundException =>
@@ -964,7 +965,7 @@ private[deploy] class Master(
         logWarning(msg)
         msg += " Did you specify the correct logging directory?"
         msg = URLEncoder.encode(msg, "UTF-8")
-        app.desc.appUiUrl = notFoundBasePath + s"?msg=$msg&title=$title"
+        app.appUIUrlAtHistoryServer = Some(notFoundBasePath + s"?msg=$msg&title=$title")
         None
       case e: Exception =>
         // Relay exception message to application UI page
@@ -973,7 +974,8 @@ private[deploy] class Master(
         var msg = s"Exception in replaying log for application $appName!"
         logError(msg, e)
         msg = URLEncoder.encode(msg, "UTF-8")
-        app.desc.appUiUrl = notFoundBasePath + s"?msg=$msg&exception=$exception&title=$title"
+        app.appUIUrlAtHistoryServer =
+            Some(notFoundBasePath + s"?msg=$msg&exception=$exception&title=$title")
         None
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/ui/ApplicationPage.scala b/core/src/main/scala/org/apache/spark/deploy/master/ui/ApplicationPage.scala
index e28e7e379ac9..f405aa2bdc8b 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/ui/ApplicationPage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/ui/ApplicationPage.scala
@@ -76,7 +76,7 @@ private[ui] class ApplicationPage(parent: MasterWebUI) extends WebUIPage("app")
             </li>
             <li><strong>Submit Date:</strong> {app.submitDate}</li>
             <li><strong>State:</strong> {app.state}</li>
-            <li><strong><a href={app.desc.appUiUrl}>Application Detail UI</a></strong></li>
+            <li><strong><a href={app.curAppUIUrl}>Application Detail UI</a></strong></li>
           </ul>
         </div>
       </div>
diff --git a/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterPage.scala b/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterPage.scala
index c3e20ebf8d6e..ee539dd1f511 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterPage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterPage.scala
@@ -206,7 +206,7 @@ private[ui] class MasterPage(parent: MasterWebUI) extends WebUIPage("") {
         {killLink}
       </td>
       <td>
-        <a href={app.desc.appUiUrl}>{app.desc.name}</a>
+        <a href={app.curAppUIUrl}>{app.desc.name}</a>
       </td>
       <td>
         {app.coresGranted}
diff --git a/core/src/test/scala/org/apache/spark/deploy/DeployTestUtils.scala b/core/src/test/scala/org/apache/spark/deploy/DeployTestUtils.scala
index 967aa0976f0c..3164760b08a7 100644
--- a/core/src/test/scala/org/apache/spark/deploy/DeployTestUtils.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/DeployTestUtils.scala
@@ -31,8 +31,9 @@ private[deploy] object DeployTestUtils {
   }
 
   def createAppInfo() : ApplicationInfo = {
+    val appDesc = createAppDesc()
     val appInfo = new ApplicationInfo(JsonConstants.appInfoStartTime,
-      "id", createAppDesc(), JsonConstants.submitDate, null, Int.MaxValue)
+      "id", appDesc, JsonConstants.submitDate, null, Int.MaxValue)
     appInfo.endTime = JsonConstants.currTimeInMillis
     appInfo
   }

From d188a67762dfc09929e30931509be5851e29dfa5 Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Tue, 3 Nov 2015 22:30:23 +0800
Subject: [PATCH 464/896] [SPARK-10533][SQL] handle scientific notation in
 sqlParser

https://issues.apache.org/jira/browse/SPARK-10533

val df = sqlContext.createDataFrame(Seq(("a",1.0),("b",2.0),("c",3.0)))
df.filter("_2 < 2.0e1").show

Scientific notation didn't work.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #9085 from adrian-wang/scinotation.
---
 .../sql/catalyst/AbstractSparkSQLParser.scala     | 15 +++++++++++++--
 .../org/apache/spark/sql/catalyst/SqlParser.scala | 11 +++++++++++
 .../org/apache/spark/sql/DataFrameSuite.scala     | 11 ++++++++---
 3 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
index 2bac08eac4fe..04ac4f20c66e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
@@ -82,6 +82,10 @@ class SqlLexical extends StdLexical {
     override def toString: String = chars
   }
 
+  case class DecimalLit(chars: String) extends Token {
+    override def toString: String = chars
+  }
+
   /* This is a work around to support the lazy setting */
   def initialize(keywords: Seq[String]): Unit = {
     reserved.clear()
@@ -102,8 +106,12 @@ class SqlLexical extends StdLexical {
   }
 
   override lazy val token: Parser[Token] =
-    ( identChar ~ (identChar | digit).* ^^
-      { case first ~ rest => processIdent((first :: rest).mkString) }
+    ( rep1(digit) ~ ('.' ~> digit.*).? ~ (exp ~> sign.? ~ rep1(digit)) ^^ {
+        case i ~ None ~ (sig ~ rest) =>
+          DecimalLit(i.mkString + "e" + sig.mkString + rest.mkString)
+        case i ~ Some(d) ~ (sig ~ rest) =>
+          DecimalLit(i.mkString + "." + d.mkString + "e" + sig.mkString + rest.mkString)
+      }
     | digit.* ~ identChar ~ (identChar | digit).* ^^
       { case first ~ middle ~ rest => processIdent((first ++ (middle :: rest)).mkString) }
     | rep1(digit) ~ ('.' ~> digit.*).? ^^ {
@@ -125,6 +133,9 @@ class SqlLexical extends StdLexical {
 
   override def identChar: Parser[Elem] = letter | elem('_')
 
+  private lazy val sign: Parser[Elem] = elem("s", c => c == '+' || c == '-')
+  private lazy val exp: Parser[Elem] = elem("e", c => c == 'E' || c == 'e')
+
   override def whitespace: Parser[Any] =
     ( whitespaceChar
     | '/' ~ '*' ~ comment
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index d7567e8613e3..1ba559d9e3b1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -337,6 +337,9 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     | sign.? ~ unsignedFloat ^^ {
       case s ~ f => Literal(toDecimalOrDouble(s.getOrElse("") + f))
     }
+    | sign.? ~ unsignedDecimal ^^ {
+      case s ~ d => Literal(toDecimalOrDouble(s.getOrElse("") + d))
+    }
     )
 
   protected lazy val unsignedFloat: Parser[String] =
@@ -344,6 +347,14 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     | elem("decimal", _.isInstanceOf[lexical.FloatLit]) ^^ (_.chars)
     )
 
+  protected lazy val unsignedDecimal: Parser[String] =
+    ( "." ~> decimalLit ^^ { u => "0." + u }
+    | elem("scientific_notation", _.isInstanceOf[lexical.DecimalLit]) ^^ (_.chars)
+    )
+
+  def decimalLit: Parser[String] =
+    elem("scientific_notation", _.isInstanceOf[lexical.DecimalLit]) ^^ (_.chars)
+
   protected lazy val sign: Parser[String] = ("+" | "-")
 
   protected lazy val integral: Parser[String] =
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 6b86c5951b41..a883bcb7b101 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -177,9 +177,14 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
   }
 
   test("filterExpr") {
-    checkAnswer(
-      testData.filter("key > 90"),
-      testData.collect().filter(_.getInt(0) > 90).toSeq)
+    val res = testData.collect().filter(_.getInt(0) > 90).toSeq
+    checkAnswer(testData.filter("key > 90"), res)
+    checkAnswer(testData.filter("key > 9.0e1"), res)
+    checkAnswer(testData.filter("key > .9e+2"), res)
+    checkAnswer(testData.filter("key > 0.9e+2"), res)
+    checkAnswer(testData.filter("key > 900e-1"), res)
+    checkAnswer(testData.filter("key > 900.0E-1"), res)
+    checkAnswer(testData.filter("key > 9.e+1"), res)
   }
 
   test("filterExpr using where") {

From 57446eb69ceb6b8856ab22b54abb22b47b80f841 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 3 Nov 2015 07:06:00 -0800
Subject: [PATCH 465/896] [SPARK-11256] Mark all
 Stage/ResultStage/ShuffleMapStage internal state as private.

Author: Reynold Xin <rxin@databricks.com>

Closes #9219 from rxin/stage-cleanup1.
---
 .../apache/spark/scheduler/DAGScheduler.scala | 33 +++++-----
 .../apache/spark/scheduler/ResultStage.scala  | 19 +++++-
 .../spark/scheduler/ShuffleMapStage.scala     | 61 +++++++++++++------
 .../org/apache/spark/scheduler/Stage.scala    |  5 +-
 4 files changed, 80 insertions(+), 38 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 995862ece594..5673fbf2c8fe 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -23,7 +23,7 @@ import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicInteger
 
 import scala.collection.Map
-import scala.collection.mutable.{ArrayBuffer, HashMap, HashSet, Stack}
+import scala.collection.mutable.{HashMap, HashSet, Stack}
 import scala.concurrent.duration._
 import scala.language.existentials
 import scala.language.postfixOps
@@ -535,10 +535,8 @@ class DAGScheduler(
     jobIdToActiveJob -= job.jobId
     activeJobs -= job
     job.finalStage match {
-      case r: ResultStage =>
-        r.resultOfJob = None
-      case m: ShuffleMapStage =>
-        m.mapStageJobs = m.mapStageJobs.filter(_ != job)
+      case r: ResultStage => r.removeActiveJob()
+      case m: ShuffleMapStage => m.removeActiveJob(job)
     }
   }
 
@@ -848,7 +846,7 @@ class DAGScheduler(
     val jobSubmissionTime = clock.getTimeMillis()
     jobIdToActiveJob(jobId) = job
     activeJobs += job
-    finalStage.resultOfJob = Some(job)
+    finalStage.setActiveJob(job)
     val stageIds = jobIdToStageIds(jobId).toArray
     val stageInfos = stageIds.flatMap(id => stageIdToStage.get(id).map(_.latestInfo))
     listenerBus.post(
@@ -880,7 +878,7 @@ class DAGScheduler(
     val job = new ActiveJob(jobId, finalStage, callSite, listener, properties)
     clearCacheLocs()
     logInfo("Got map stage job %s (%s) with %d output partitions".format(
-      jobId, callSite.shortForm, dependency.rdd.partitions.size))
+      jobId, callSite.shortForm, dependency.rdd.partitions.length))
     logInfo("Final stage: " + finalStage + " (" + finalStage.name + ")")
     logInfo("Parents of final stage: " + finalStage.parents)
     logInfo("Missing parents: " + getMissingParentStages(finalStage))
@@ -888,7 +886,7 @@ class DAGScheduler(
     val jobSubmissionTime = clock.getTimeMillis()
     jobIdToActiveJob(jobId) = job
     activeJobs += job
-    finalStage.mapStageJobs = job :: finalStage.mapStageJobs
+    finalStage.addActiveJob(job)
     val stageIds = jobIdToStageIds(jobId).toArray
     val stageInfos = stageIds.flatMap(id => stageIdToStage.get(id).map(_.latestInfo))
     listenerBus.post(
@@ -950,12 +948,12 @@ class DAGScheduler(
     // will be posted, which should always come after a corresponding SparkListenerStageSubmitted
     // event.
     outputCommitCoordinator.stageStart(stage.id)
-    val taskIdToLocations = try {
+    val taskIdToLocations: Map[Int, Seq[TaskLocation]] = try {
       stage match {
         case s: ShuffleMapStage =>
           partitionsToCompute.map { id => (id, getPreferredLocs(stage.rdd, id))}.toMap
         case s: ResultStage =>
-          val job = s.resultOfJob.get
+          val job = s.activeJob.get
           partitionsToCompute.map { id =>
             val p = s.partitions(id)
             (id, getPreferredLocs(stage.rdd, p))
@@ -1016,7 +1014,7 @@ class DAGScheduler(
           }
 
         case stage: ResultStage =>
-          val job = stage.resultOfJob.get
+          val job = stage.activeJob.get
           partitionsToCompute.map { id =>
             val p: Int = stage.partitions(id)
             val part = stage.rdd.partitions(p)
@@ -1132,7 +1130,7 @@ class DAGScheduler(
             // Cast to ResultStage here because it's part of the ResultTask
             // TODO Refactor this out to a function that accepts a ResultStage
             val resultStage = stage.asInstanceOf[ResultStage]
-            resultStage.resultOfJob match {
+            resultStage.activeJob match {
               case Some(job) =>
                 if (!job.finished(rt.outputId)) {
                   updateAccumulators(event)
@@ -1187,7 +1185,7 @@ class DAGScheduler(
               //       we registered these map outputs.
               mapOutputTracker.registerMapOutputs(
                 shuffleStage.shuffleDep.shuffleId,
-                shuffleStage.outputLocs.map(_.headOption.orNull),
+                shuffleStage.outputLocInMapOutputTrackerFormat(),
                 changeEpoch = true)
 
               clearCacheLocs()
@@ -1197,8 +1195,7 @@ class DAGScheduler(
                 // TODO: Lower-level scheduler should also deal with this
                 logInfo("Resubmitting " + shuffleStage + " (" + shuffleStage.name +
                   ") because some of its tasks had failed: " +
-                  shuffleStage.outputLocs.zipWithIndex.filter(_._1.isEmpty)
-                    .map(_._2).mkString(", "))
+                  shuffleStage.findMissingPartitions().mkString(", "))
                 submitStage(shuffleStage)
               } else {
                 // Mark any map-stage jobs waiting on this stage as finished
@@ -1312,8 +1309,10 @@ class DAGScheduler(
         // TODO: This will be really slow if we keep accumulating shuffle map stages
         for ((shuffleId, stage) <- shuffleToMapStage) {
           stage.removeOutputsOnExecutor(execId)
-          val locs = stage.outputLocs.map(_.headOption.orNull)
-          mapOutputTracker.registerMapOutputs(shuffleId, locs, changeEpoch = true)
+          mapOutputTracker.registerMapOutputs(
+            shuffleId,
+            stage.outputLocInMapOutputTrackerFormat(),
+            changeEpoch = true)
         }
         if (shuffleToMapStage.isEmpty) {
           mapOutputTracker.incrementEpoch()
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala b/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
index c1d86af7e8fb..d1687830ff7b 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ResultStage.scala
@@ -41,10 +41,25 @@ private[spark] class ResultStage(
    * The active job for this result stage. Will be empty if the job has already finished
    * (e.g., because the job was cancelled).
    */
-  var resultOfJob: Option[ActiveJob] = None
+  private[this] var _activeJob: Option[ActiveJob] = None
 
+  def activeJob: Option[ActiveJob] = _activeJob
+
+  def setActiveJob(job: ActiveJob): Unit = {
+    _activeJob = Option(job)
+  }
+
+  def removeActiveJob(): Unit = {
+    _activeJob = None
+  }
+
+  /**
+   * Returns the sequence of partition ids that are missing (i.e. needs to be computed).
+   *
+   * This can only be called when there is an active job.
+   */
   override def findMissingPartitions(): Seq[Int] = {
-    val job = resultOfJob.get
+    val job = activeJob.get
     (0 until job.numPartitions).filter(id => !job.finished(id))
   }
 
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
index 3832d99eddae..51416e5ce97f 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapStage.scala
@@ -43,35 +43,53 @@ private[spark] class ShuffleMapStage(
     val shuffleDep: ShuffleDependency[_, _, _])
   extends Stage(id, rdd, numTasks, parents, firstJobId, callSite) {
 
+  private[this] var _mapStageJobs: List[ActiveJob] = Nil
+
+  private[this] var _numAvailableOutputs: Int = 0
+
+  /**
+   * List of [[MapStatus]] for each partition. The index of the array is the map partition id,
+   * and each value in the array is the list of possible [[MapStatus]] for a partition
+   * (a single task might run multiple times).
+   */
+  private[this] val outputLocs = Array.fill[List[MapStatus]](numPartitions)(Nil)
+
   override def toString: String = "ShuffleMapStage " + id
 
-  /** Running map-stage jobs that were submitted to execute this stage independently (if any) */
-  var mapStageJobs: List[ActiveJob] = Nil
+  /**
+   * Returns the list of active jobs,
+   * i.e. map-stage jobs that were submitted to execute this stage independently (if any).
+   */
+  def mapStageJobs: Seq[ActiveJob] = _mapStageJobs
+
+  /** Adds the job to the active job list. */
+  def addActiveJob(job: ActiveJob): Unit = {
+    _mapStageJobs = job :: _mapStageJobs
+  }
+
+  /** Removes the job from the active job list. */
+  def removeActiveJob(job: ActiveJob): Unit = {
+    _mapStageJobs = _mapStageJobs.filter(_ != job)
+  }
 
   /**
    * Number of partitions that have shuffle outputs.
    * When this reaches [[numPartitions]], this map stage is ready.
    * This should be kept consistent as `outputLocs.filter(!_.isEmpty).size`.
    */
-  var numAvailableOutputs: Int = 0
+  def numAvailableOutputs: Int = _numAvailableOutputs
 
   /**
    * Returns true if the map stage is ready, i.e. all partitions have shuffle outputs.
    * This should be the same as `outputLocs.contains(Nil)`.
    */
-  def isAvailable: Boolean = numAvailableOutputs == numPartitions
-
-  /**
-   * List of [[MapStatus]] for each partition. The index of the array is the map partition id,
-   * and each value in the array is the list of possible [[MapStatus]] for a partition
-   * (a single task might run multiple times).
-   */
-  val outputLocs = Array.fill[List[MapStatus]](numPartitions)(Nil)
+  def isAvailable: Boolean = _numAvailableOutputs == numPartitions
 
+  /** Returns the sequence of partition ids that are missing (i.e. needs to be computed). */
   override def findMissingPartitions(): Seq[Int] = {
     val missing = (0 until numPartitions).filter(id => outputLocs(id).isEmpty)
-    assert(missing.size == numPartitions - numAvailableOutputs,
-      s"${missing.size} missing, expected ${numPartitions - numAvailableOutputs}")
+    assert(missing.size == numPartitions - _numAvailableOutputs,
+      s"${missing.size} missing, expected ${numPartitions - _numAvailableOutputs}")
     missing
   }
 
@@ -79,7 +97,7 @@ private[spark] class ShuffleMapStage(
     val prevList = outputLocs(partition)
     outputLocs(partition) = status :: prevList
     if (prevList == Nil) {
-      numAvailableOutputs += 1
+      _numAvailableOutputs += 1
     }
   }
 
@@ -88,10 +106,19 @@ private[spark] class ShuffleMapStage(
     val newList = prevList.filterNot(_.location == bmAddress)
     outputLocs(partition) = newList
     if (prevList != Nil && newList == Nil) {
-      numAvailableOutputs -= 1
+      _numAvailableOutputs -= 1
     }
   }
 
+  /**
+   * Returns an array of [[MapStatus]] (index by partition id). For each partition, the returned
+   * value contains only one (i.e. the first) [[MapStatus]]. If there is no entry for the partition,
+   * that position is filled with null.
+   */
+  def outputLocInMapOutputTrackerFormat(): Array[MapStatus] = {
+    outputLocs.map(_.headOption.orNull)
+  }
+
   /**
    * Removes all shuffle outputs associated with this executor. Note that this will also remove
    * outputs which are served by an external shuffle server (if one exists), as they are still
@@ -105,12 +132,12 @@ private[spark] class ShuffleMapStage(
       outputLocs(partition) = newList
       if (prevList != Nil && newList == Nil) {
         becameUnavailable = true
-        numAvailableOutputs -= 1
+        _numAvailableOutputs -= 1
       }
     }
     if (becameUnavailable) {
       logInfo("%s is now unavailable on executor %s (%d/%d, %s)".format(
-        this, execId, numAvailableOutputs, numPartitions, isAvailable))
+        this, execId, _numAvailableOutputs, numPartitions, isAvailable))
     }
   }
 }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
index 5ce4a484344f..7ea24a217bd3 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/Stage.scala
@@ -71,8 +71,8 @@ private[scheduler] abstract class Stage(
   /** The ID to use for the next new attempt for this stage. */
   private var nextAttemptId: Int = 0
 
-  val name = callSite.shortForm
-  val details = callSite.longForm
+  val name: String = callSite.shortForm
+  val details: String = callSite.longForm
 
   private var _internalAccumulators: Seq[Accumulator[Long]] = Seq.empty
 
@@ -134,6 +134,7 @@ private[scheduler] abstract class Stage(
   def latestInfo: StageInfo = _latestInfo
 
   override final def hashCode(): Int = id
+
   override final def equals(other: Any): Boolean = other match {
     case stage: Stage => stage != null && stage.id == id
     case _ => false

From d6035d97c91fe78b1336ade48134252915263ea6 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Tue, 3 Nov 2015 07:41:50 -0800
Subject: [PATCH 466/896] [SPARK-10304] [SQL] Partition discovery should throw
 an exception if the dir structure is invalid

JIRA: https://issues.apache.org/jira/browse/SPARK-10304

This patch detects if the structure of partition directories is not valid.

The test cases are from #8547. Thanks zhzhan.

cc liancheng

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #8840 from viirya/detect_invalid_part_dir.
---
 .../datasources/PartitioningUtils.scala       | 36 +++++++++++++------
 .../ParquetPartitionDiscoverySuite.scala      | 36 +++++++++++++++++--
 2 files changed, 59 insertions(+), 13 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
index 0a2007e15843..628c5e18936c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
@@ -77,9 +77,11 @@ private[sql] object PartitioningUtils {
       defaultPartitionName: String,
       typeInference: Boolean): PartitionSpec = {
     // First, we need to parse every partition's path and see if we can find partition values.
-    val pathsWithPartitionValues = paths.flatMap { path =>
-      parsePartition(path, defaultPartitionName, typeInference).map(path -> _)
-    }
+    val (partitionValues, optBasePaths) = paths.map { path =>
+      parsePartition(path, defaultPartitionName, typeInference)
+    }.unzip
+
+    val pathsWithPartitionValues = paths.zip(partitionValues).flatMap(x => x._2.map(x._1 -> _))
 
     if (pathsWithPartitionValues.isEmpty) {
       // This dataset is not partitioned.
@@ -87,6 +89,12 @@ private[sql] object PartitioningUtils {
     } else {
       // This dataset is partitioned. We need to check whether all partitions have the same
       // partition columns and resolve potential type conflicts.
+      val basePaths = optBasePaths.flatMap(x => x)
+      assert(
+        basePaths.distinct.size == 1,
+        "Conflicting directory structures detected. Suspicious paths:\b" +
+          basePaths.mkString("\n\t", "\n\t", "\n\n"))
+
       val resolvedPartitionValues = resolvePartitions(pathsWithPartitionValues)
 
       // Creates the StructType which represents the partition columns.
@@ -110,12 +118,12 @@ private[sql] object PartitioningUtils {
   }
 
   /**
-   * Parses a single partition, returns column names and values of each partition column.  For
-   * example, given:
+   * Parses a single partition, returns column names and values of each partition column, also
+   * the base path.  For example, given:
    * {{{
    *   path = hdfs://<host>:<port>/path/to/partition/a=42/b=hello/c=3.14
    * }}}
-   * it returns:
+   * it returns the partition:
    * {{{
    *   PartitionValues(
    *     Seq("a", "b", "c"),
@@ -124,34 +132,40 @@ private[sql] object PartitioningUtils {
    *       Literal.create("hello", StringType),
    *       Literal.create(3.14, FloatType)))
    * }}}
+   * and the base path:
+   * {{{
+   *   /path/to/partition
+   * }}}
    */
   private[sql] def parsePartition(
       path: Path,
       defaultPartitionName: String,
-      typeInference: Boolean): Option[PartitionValues] = {
+      typeInference: Boolean): (Option[PartitionValues], Option[Path]) = {
     val columns = ArrayBuffer.empty[(String, Literal)]
     // Old Hadoop versions don't have `Path.isRoot`
     var finished = path.getParent == null
     var chopped = path
+    var basePath = path
 
     while (!finished) {
       // Sometimes (e.g., when speculative task is enabled), temporary directories may be left
       // uncleaned.  Here we simply ignore them.
       if (chopped.getName.toLowerCase == "_temporary") {
-        return None
+        return (None, None)
       }
 
       val maybeColumn = parsePartitionColumn(chopped.getName, defaultPartitionName, typeInference)
       maybeColumn.foreach(columns += _)
+      basePath = chopped
       chopped = chopped.getParent
-      finished = maybeColumn.isEmpty || chopped.getParent == null
+      finished = (maybeColumn.isEmpty && !columns.isEmpty) || chopped.getParent == null
     }
 
     if (columns.isEmpty) {
-      None
+      (None, Some(path))
     } else {
       val (columnNames, values) = columns.reverse.unzip
-      Some(PartitionValues(columnNames, values))
+      (Some(PartitionValues(columnNames, values)), Some(basePath))
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
index 3a23b8ed6680..67b6a37fa502 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
@@ -58,14 +58,46 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
     check(defaultPartitionName, Literal.create(null, NullType))
   }
 
+  test("parse invalid partitioned directories") {
+    // Invalid
+    var paths = Seq(
+      "hdfs://host:9000/invalidPath",
+      "hdfs://host:9000/path/a=10/b=20",
+      "hdfs://host:9000/path/a=10.5/b=hello")
+
+    var exception = intercept[AssertionError] {
+      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+    }
+    assert(exception.getMessage().contains("Conflicting directory structures detected"))
+
+    // Valid
+    paths = Seq(
+      "hdfs://host:9000/path/_temporary",
+      "hdfs://host:9000/path/a=10/b=20",
+      "hdfs://host:9000/path/_temporary/path")
+
+    parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+
+    // Invalid
+    paths = Seq(
+      "hdfs://host:9000/path/_temporary",
+      "hdfs://host:9000/path/a=10/b=20",
+      "hdfs://host:9000/path/path1")
+
+    exception = intercept[AssertionError] {
+      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+    }
+    assert(exception.getMessage().contains("Conflicting directory structures detected"))
+  }
+
   test("parse partition") {
     def check(path: String, expected: Option[PartitionValues]): Unit = {
-      assert(expected === parsePartition(new Path(path), defaultPartitionName, true))
+      assert(expected === parsePartition(new Path(path), defaultPartitionName, true)._1)
     }
 
     def checkThrows[T <: Throwable: Manifest](path: String, expected: String): Unit = {
       val message = intercept[T] {
-        parsePartition(new Path(path), defaultPartitionName, true).get
+        parsePartition(new Path(path), defaultPartitionName, true)
       }.getMessage
 
       assert(message.contains(expected))

From d6f10aa7ea2806c0fbcfc31d7dee91d28319fab7 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 3 Nov 2015 08:29:07 -0800
Subject: [PATCH 467/896] [SPARK-9836][ML] Provide R-like summary statistics
 for OLS via normal equation solver

https://issues.apache.org/jira/browse/SPARK-9836

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9413 from yanboliang/spark-9836.
---
 .../spark/ml/optim/WeightedLeastSquares.scala |  15 +-
 .../ml/regression/LinearRegression.scala      |  90 +++++++++++-
 .../mllib/linalg/CholeskyDecomposition.scala  |  16 +++
 .../ml/regression/LinearRegressionSuite.scala | 129 ++++++++++++++++++
 4 files changed, 243 insertions(+), 7 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
index 3d64f7f29613..e612a2122ed6 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
@@ -26,10 +26,12 @@ import org.apache.spark.rdd.RDD
  * Model fitted by [[WeightedLeastSquares]].
  * @param coefficients model coefficients
  * @param intercept model intercept
+ * @param diagInvAtWA diagonal of matrix (A^T * W * A)^-1
  */
 private[ml] class WeightedLeastSquaresModel(
     val coefficients: DenseVector,
-    val intercept: Double) extends Serializable
+    val intercept: Double,
+    val diagInvAtWA: DenseVector) extends Serializable
 
 /**
  * Weighted least squares solver via normal equation.
@@ -73,7 +75,9 @@ private[ml] class WeightedLeastSquares(
     val summary = instances.treeAggregate(new Aggregator)(_.add(_), _.merge(_))
     summary.validate()
     logInfo(s"Number of instances: ${summary.count}.")
+    val k = summary.k
     val triK = summary.triK
+    val wSum = summary.wSum
     val bBar = summary.bBar
     val bStd = summary.bStd
     val aBar = summary.aBar
@@ -109,6 +113,11 @@ private[ml] class WeightedLeastSquares(
 
     val x = new DenseVector(CholeskyDecomposition.solve(aaBar.values, abBar.values))
 
+    val aaInv = CholeskyDecomposition.inverse(aaBar.values, k)
+    // aaInv is a packed upper triangular matrix, here we get all elements on diagonal
+    val diagInvAtWA = new DenseVector((1 to k).map { i =>
+      aaInv(i + (i - 1) * i / 2 - 1) / wSum }.toArray)
+
     // compute intercept
     val intercept = if (fitIntercept) {
       bBar - BLAS.dot(aBar, x)
@@ -116,7 +125,7 @@ private[ml] class WeightedLeastSquares(
       0.0
     }
 
-    new WeightedLeastSquaresModel(x, intercept)
+    new WeightedLeastSquaresModel(x, intercept, diagInvAtWA)
   }
 }
 
@@ -131,7 +140,7 @@ private[ml] object WeightedLeastSquares {
     var k: Int = _
     var count: Long = _
     var triK: Int = _
-    private var wSum: Double = _
+    var wSum: Double = _
     private var wwSum: Double = _
     private var bSum: Double = _
     private var bbSum: Double = _
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 6e9c7442b811..c51e30483ab3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -21,6 +21,7 @@ import scala.collection.mutable
 
 import breeze.linalg.{DenseVector => BDV}
 import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS, OWLQN => BreezeOWLQN}
+import breeze.stats.distributions.StudentsT
 
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.annotation.Experimental
@@ -36,7 +37,7 @@ import org.apache.spark.mllib.linalg.BLAS._
 import org.apache.spark.mllib.stat.MultivariateOnlineSummarizer
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.{DataFrame, Row}
-import org.apache.spark.sql.functions.{col, udf, lit}
+import org.apache.spark.sql.functions._
 import org.apache.spark.storage.StorageLevel
 
 /**
@@ -173,8 +174,11 @@ class LinearRegression(override val uid: String)
         summaryModel.transform(dataset),
         predictionColName,
         $(labelCol),
+        summaryModel,
+        model.diagInvAtWA.toArray,
         $(featuresCol),
         Array(0D))
+
       return lrModel.setSummary(trainingSummary)
     }
 
@@ -221,6 +225,8 @@ class LinearRegression(override val uid: String)
         summaryModel.transform(dataset),
         predictionColName,
         $(labelCol),
+        model,
+        Array(0D),
         $(featuresCol),
         Array(0D))
       return copyValues(model.setSummary(trainingSummary))
@@ -316,6 +322,8 @@ class LinearRegression(override val uid: String)
       summaryModel.transform(dataset),
       predictionColName,
       $(labelCol),
+      model,
+      Array(0D),
       $(featuresCol),
       objectiveHistory)
     model.setSummary(trainingSummary)
@@ -371,7 +379,8 @@ class LinearRegressionModel private[ml] (
   private[regression] def evaluate(dataset: DataFrame): LinearRegressionSummary = {
     // Handle possible missing or invalid prediction columns
     val (summaryModel, predictionColName) = findSummaryModelAndPredictionCol()
-    new LinearRegressionSummary(summaryModel.transform(dataset), predictionColName, $(labelCol))
+    new LinearRegressionSummary(summaryModel.transform(dataset), predictionColName,
+      $(labelCol), this, Array(0D))
   }
 
   /**
@@ -412,9 +421,11 @@ class LinearRegressionTrainingSummary private[regression] (
     predictions: DataFrame,
     predictionCol: String,
     labelCol: String,
+    model: LinearRegressionModel,
+    diagInvAtWA: Array[Double],
     val featuresCol: String,
     val objectiveHistory: Array[Double])
-  extends LinearRegressionSummary(predictions, predictionCol, labelCol) {
+  extends LinearRegressionSummary(predictions, predictionCol, labelCol, model, diagInvAtWA) {
 
   /** Number of training iterations until termination */
   val totalIterations = objectiveHistory.length
@@ -430,7 +441,9 @@ class LinearRegressionTrainingSummary private[regression] (
 class LinearRegressionSummary private[regression] (
     @transient val predictions: DataFrame,
     val predictionCol: String,
-    val labelCol: String) extends Serializable {
+    val labelCol: String,
+    val model: LinearRegressionModel,
+    val diagInvAtWA: Array[Double]) extends Serializable {
 
   @transient private val metrics = new RegressionMetrics(
     predictions
@@ -474,6 +487,75 @@ class LinearRegressionSummary private[regression] (
     predictions.select(t(col(predictionCol), col(labelCol)).as("residuals"))
   }
 
+  /** Number of instances in DataFrame predictions */
+  lazy val numInstances: Long = predictions.count()
+
+  /** Degrees of freedom */
+  private val degreesOfFreedom: Long = if (model.getFitIntercept) {
+    numInstances - model.coefficients.size - 1
+  } else {
+    numInstances - model.coefficients.size
+  }
+
+  /**
+   * The weighted residuals, the usual residuals rescaled by
+   * the square root of the instance weights.
+   */
+  lazy val devianceResiduals: Array[Double] = {
+    val weighted = if (model.getWeightCol.isEmpty) lit(1.0) else sqrt(col(model.getWeightCol))
+    val dr = predictions.select(col(model.getLabelCol).minus(col(model.getPredictionCol))
+      .multiply(weighted).as("weightedResiduals"))
+      .select(min(col("weightedResiduals")).as("min"), max(col("weightedResiduals")).as("max"))
+      .first()
+    Array(dr.getDouble(0), dr.getDouble(1))
+  }
+
+  /**
+   * Standard error of estimated coefficients.
+   * Note that standard error of estimated intercept is not supported currently.
+   */
+  lazy val coefficientStandardErrors: Array[Double] = {
+    if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
+      throw new UnsupportedOperationException(
+        "No Std. Error of coefficients available for this LinearRegressionModel")
+    } else {
+      val rss = if (model.getWeightCol.isEmpty) {
+        meanSquaredError * numInstances
+      } else {
+        val t = udf { (pred: Double, label: Double, weight: Double) =>
+          math.pow(label - pred, 2.0) * weight }
+        predictions.select(t(col(model.getPredictionCol), col(model.getLabelCol),
+          col(model.getWeightCol)).as("wse")).agg(sum(col("wse"))).first().getDouble(0)
+      }
+      val sigma2 = rss / degreesOfFreedom
+      diagInvAtWA.map(_ * sigma2).map(math.sqrt(_))
+    }
+  }
+
+  /** T-statistic of estimated coefficients.
+    * Note that t-statistic of estimated intercept is not supported currently.
+    */
+  lazy val tValues: Array[Double] = {
+    if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
+      throw new UnsupportedOperationException(
+        "No t-statistic available for this LinearRegressionModel")
+    } else {
+      model.coefficients.toArray.zip(coefficientStandardErrors).map { x => x._1 / x._2 }
+    }
+  }
+
+  /** Two-sided p-value of estimated coefficients.
+    * Note that p-value of estimated intercept is not supported currently.
+    */
+  lazy val pValues: Array[Double] = {
+    if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
+      throw new UnsupportedOperationException(
+        "No p-value available for this LinearRegressionModel")
+    } else {
+      tValues.map { x => 2.0 * (1.0 - StudentsT(degreesOfFreedom.toDouble).cdf(math.abs(x))) }
+    }
+  }
+
 }
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala
index 66eb40b6f4a6..0cd371e9cce3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/CholeskyDecomposition.scala
@@ -40,4 +40,20 @@ private[spark] object CholeskyDecomposition {
     assert(code == 0, s"lapack.dpotrs returned $code.")
     bx
   }
+
+  /**
+   * Computes the inverse of a real symmetric positive definite matrix A
+   * using the Cholesky factorization A = U**T*U.
+   * The input arguments are modified in-place to store the inverse matrix.
+   * @param UAi the upper triangular factor U from the Cholesky factorization A = U**T*U
+   * @param k the dimension of A
+   * @return the upper triangle of the (symmetric) inverse of A
+   */
+  def inverse(UAi: Array[Double], k: Int): Array[Double] = {
+    val info = new intW(0)
+    lapack.dpptri("U", k, UAi, info)
+    val code = info.`val`
+    assert(code == 0, s"lapack.dpptri returned $code.")
+    UAi
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index 235c796d785a..fbf83e892286 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -35,6 +35,7 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
   @transient var datasetWithDenseFeature: DataFrame = _
   @transient var datasetWithDenseFeatureWithoutIntercept: DataFrame = _
   @transient var datasetWithSparseFeature: DataFrame = _
+  @transient var datasetWithWeight: DataFrame = _
 
   /*
      In `LinearRegressionSuite`, we will make sure that the model trained by SparkML
@@ -73,6 +74,22 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         xMean = Seq.fill(featureSize)(r.nextDouble).toArray,
         xVariance = Seq.fill(featureSize)(r.nextDouble).toArray, nPoints = 200,
         seed, eps = 0.1, sparsity = 0.7), 2))
+
+    /*
+       R code:
+
+       A <- matrix(c(0, 1, 2, 3, 5, 7, 11, 13), 4, 2)
+       b <- c(17, 19, 23, 29)
+       w <- c(1, 2, 3, 4)
+       df <- as.data.frame(cbind(A, b))
+     */
+    datasetWithWeight = sqlContext.createDataFrame(
+      sc.parallelize(Seq(
+        Instance(17.0, 1.0, Vectors.dense(0.0, 5.0).toSparse),
+        Instance(19.0, 2.0, Vectors.dense(1.0, 7.0)),
+        Instance(23.0, 3.0, Vectors.dense(2.0, 11.0)),
+        Instance(29.0, 4.0, Vectors.dense(3.0, 13.0))
+      ), 2))
   }
 
   test("params") {
@@ -603,6 +620,16 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         // To clalify that the normal solver is used here.
         assert(model.summary.objectiveHistory.length == 1)
         assert(model.summary.objectiveHistory(0) == 0.0)
+        val devianceResidualsR = Array(-0.35566, 0.34504)
+        val seCoefR = Array(0.0011756, 0.0009032)
+        val tValsR = Array(3998, 7971)
+        val pValsR = Array(0, 0)
+        model.summary.devianceResiduals.zip(devianceResidualsR).foreach { x =>
+          assert(x._1 ~== x._2 absTol 1E-3) }
+        model.summary.coefficientStandardErrors.zip(seCoefR).foreach{ x =>
+          assert(x._1 ~== x._2 absTol 1E-3) }
+        model.summary.tValues.map(_.round).zip(tValsR).foreach{ x => assert(x._1 === x._2) }
+        model.summary.pValues.map(_.round).zip(pValsR).foreach{ x => assert(x._1 === x._2) }
       }
     }
   }
@@ -725,4 +752,106 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         .sliding(2)
         .forall(x => x(0) >= x(1)))
   }
+
+  test("linear regression summary with weighted samples and intercept by normal solver") {
+    /*
+       R code:
+
+       model <- glm(formula = "b ~ .", data = df, weights = w)
+       summary(model)
+
+       Call:
+       glm(formula = "b ~ .", data = df, weights = w)
+
+       Deviance Residuals:
+            1       2       3       4
+        1.920  -1.358  -1.109   0.960
+
+       Coefficients:
+                   Estimate Std. Error t value Pr(>|t|)
+       (Intercept)   18.080      9.608   1.882    0.311
+       V1             6.080      5.556   1.094    0.471
+       V2            -0.600      1.960  -0.306    0.811
+
+       (Dispersion parameter for gaussian family taken to be 7.68)
+
+           Null deviance: 202.00  on 3  degrees of freedom
+       Residual deviance:   7.68  on 1  degrees of freedom
+       AIC: 18.783
+
+       Number of Fisher Scoring iterations: 2
+     */
+
+    val model = new LinearRegression()
+      .setWeightCol("weight")
+      .setSolver("normal")
+      .fit(datasetWithWeight)
+    val coefficientsR = Vectors.dense(Array(6.080, -0.600))
+    val interceptR = 18.080
+    val devianceResidualsR = Array(-1.358, 1.920)
+    val seCoefR = Array(5.556, 1.960)
+    val tValsR = Array(1.094, -0.306)
+    val pValsR = Array(0.471, 0.811)
+
+    assert(model.coefficients ~== coefficientsR absTol 1E-3)
+    assert(model.intercept ~== interceptR absTol 1E-3)
+    model.summary.devianceResiduals.zip(devianceResidualsR).foreach { x =>
+      assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.coefficientStandardErrors.zip(seCoefR).foreach{ x =>
+      assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.tValues.zip(tValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.pValues.zip(pValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
+  }
+
+  test("linear regression summary with weighted samples and w/o intercept by normal solver") {
+    /*
+       R code:
+
+       model <- glm(formula = "b ~ . -1", data = df, weights = w)
+       summary(model)
+
+       Call:
+       glm(formula = "b ~ . -1", data = df, weights = w)
+
+       Deviance Residuals:
+            1       2       3       4
+        1.950   2.344  -4.600   2.103
+
+       Coefficients:
+          Estimate Std. Error t value Pr(>|t|)
+       V1  -3.7271     2.9032  -1.284   0.3279
+       V2   3.0100     0.6022   4.998   0.0378 *
+       ---
+       Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
+
+       (Dispersion parameter for gaussian family taken to be 17.4376)
+
+           Null deviance: 5962.000  on 4  degrees of freedom
+       Residual deviance:   34.875  on 2  degrees of freedom
+       AIC: 22.835
+
+       Number of Fisher Scoring iterations: 2
+     */
+
+    val model = new LinearRegression()
+      .setWeightCol("weight")
+      .setSolver("normal")
+      .setFitIntercept(false)
+      .fit(datasetWithWeight)
+    val coefficientsR = Vectors.dense(Array(-3.7271, 3.0100))
+    val interceptR = 0.0
+    val devianceResidualsR = Array(-4.600, 2.344)
+    val seCoefR = Array(2.9032, 0.6022)
+    val tValsR = Array(-1.284, 4.998)
+    val pValsR = Array(0.3279, 0.0378)
+
+    assert(model.coefficients ~== coefficientsR absTol 1E-3)
+    assert(model.intercept === interceptR)
+    model.summary.devianceResiduals.zip(devianceResidualsR).foreach { x =>
+      assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.coefficientStandardErrors.zip(seCoefR).foreach{ x =>
+      assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.tValues.zip(tValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
+    model.summary.pValues.zip(pValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
+  }
 }

From 3434572b141075f00698d94e6ee80febd3093c3b Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 3 Nov 2015 08:31:16 -0800
Subject: [PATCH 468/896] [MINOR][ML] Fix naming conventions of
 AFTSurvivalRegression coefficients

Rename ```regressionCoefficients``` back to ```coefficients```, and name ```weights``` to ```parameters```.
See discussion [here](https://github.com/apache/spark/pull/9311/files#diff-e277fd0bc21f825d3196b4551c01fe5fR230). mengxr vectorijk dbtsai

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9431 from yanboliang/aft-coefficients.
---
 .../ml/regression/AFTSurvivalRegression.scala | 38 +++++++++----------
 .../AFTSurvivalRegressionSuite.scala          | 12 +++---
 2 files changed, 25 insertions(+), 25 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index 4dbbc7d39931..b7d095872ffa 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -200,17 +200,17 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 
     val numFeatures = dataset.select($(featuresCol)).take(1)(0).getAs[Vector](0).size
     /*
-       The coefficients vector has three parts:
+       The parameters vector has three parts:
        the first element: Double, log(sigma), the log of scale parameter
        the second element: Double, intercept of the beta parameter
        the third to the end elements: Doubles, regression coefficients vector of the beta parameter
      */
-    val initialCoefficients = Vectors.zeros(numFeatures + 2)
+    val initialParameters = Vectors.zeros(numFeatures + 2)
 
     val states = optimizer.iterations(new CachedDiffFunction(costFun),
-      initialCoefficients.toBreeze.toDenseVector)
+      initialParameters.toBreeze.toDenseVector)
 
-    val coefficients = {
+    val parameters = {
       val arrayBuilder = mutable.ArrayBuilder.make[Double]
       var state: optimizer.State = null
       while (states.hasNext) {
@@ -227,10 +227,10 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 
     if (handlePersistence) instances.unpersist()
 
-    val regressionCoefficients = Vectors.dense(coefficients.slice(2, coefficients.length))
-    val intercept = coefficients(1)
-    val scale = math.exp(coefficients(0))
-    val model = new AFTSurvivalRegressionModel(uid, regressionCoefficients, intercept, scale)
+    val coefficients = Vectors.dense(parameters.slice(2, parameters.length))
+    val intercept = parameters(1)
+    val scale = math.exp(parameters(0))
+    val model = new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale)
     copyValues(model.setParent(this))
   }
 
@@ -251,7 +251,7 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
 @Since("1.6.0")
 class AFTSurvivalRegressionModel private[ml] (
     @Since("1.6.0") override val uid: String,
-    @Since("1.6.0") val regressionCoefficients: Vector,
+    @Since("1.6.0") val coefficients: Vector,
     @Since("1.6.0") val intercept: Double,
     @Since("1.6.0") val scale: Double)
   extends Model[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams {
@@ -275,7 +275,7 @@ class AFTSurvivalRegressionModel private[ml] (
   @Since("1.6.0")
   def predictQuantiles(features: Vector): Vector = {
     // scale parameter for the Weibull distribution of lifetime
-    val lambda = math.exp(BLAS.dot(regressionCoefficients, features) + intercept)
+    val lambda = math.exp(BLAS.dot(coefficients, features) + intercept)
     // shape parameter for the Weibull distribution of lifetime
     val k = 1 / scale
     val quantiles = $(quantileProbabilities).map {
@@ -286,7 +286,7 @@ class AFTSurvivalRegressionModel private[ml] (
 
   @Since("1.6.0")
   def predict(features: Vector): Double = {
-    math.exp(BLAS.dot(regressionCoefficients, features) + intercept)
+    math.exp(BLAS.dot(coefficients, features) + intercept)
   }
 
   @Since("1.6.0")
@@ -309,7 +309,7 @@ class AFTSurvivalRegressionModel private[ml] (
 
   @Since("1.6.0")
   override def copy(extra: ParamMap): AFTSurvivalRegressionModel = {
-    copyValues(new AFTSurvivalRegressionModel(uid, regressionCoefficients, intercept, scale), extra)
+    copyValues(new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale), extra)
       .setParent(parent)
   }
 }
@@ -369,17 +369,17 @@ class AFTSurvivalRegressionModel private[ml] (
  *   \frac{\partial (-\iota)}{\partial (\log\sigma)}=
  *   \sum_{i=1}^{n}[\delta_{i}+(\delta_{i}-e^{\epsilon_{i}})\epsilon_{i}]
  * }}}
- * @param coefficients including three part: The log of scale parameter, the intercept and
+ * @param parameters including three part: The log of scale parameter, the intercept and
  *                regression coefficients corresponding to the features.
  * @param fitIntercept Whether to fit an intercept term.
  */
-private class AFTAggregator(coefficients: BDV[Double], fitIntercept: Boolean)
+private class AFTAggregator(parameters: BDV[Double], fitIntercept: Boolean)
   extends Serializable {
 
   // beta is the intercept and regression coefficients to the covariates
-  private val beta = coefficients.slice(1, coefficients.length)
+  private val beta = parameters.slice(1, parameters.length)
   // sigma is the scale parameter of the AFT model
-  private val sigma = math.exp(coefficients(0))
+  private val sigma = math.exp(parameters(0))
 
   private var totalCnt: Long = 0L
   private var lossSum = 0.0
@@ -449,15 +449,15 @@ private class AFTAggregator(coefficients: BDV[Double], fitIntercept: Boolean)
 
 /**
  * AFTCostFun implements Breeze's DiffFunction[T] for AFT cost.
- * It returns the loss and gradient at a particular point (coefficients).
+ * It returns the loss and gradient at a particular point (parameters).
  * It's used in Breeze's convex optimization routines.
  */
 private class AFTCostFun(data: RDD[AFTPoint], fitIntercept: Boolean)
   extends DiffFunction[BDV[Double]] {
 
-  override def calculate(coefficients: BDV[Double]): (Double, BDV[Double]) = {
+  override def calculate(parameters: BDV[Double]): (Double, BDV[Double]) = {
 
-    val aftAggregator = data.treeAggregate(new AFTAggregator(coefficients, fitIntercept))(
+    val aftAggregator = data.treeAggregate(new AFTAggregator(parameters, fitIntercept))(
       seqOp = (c, v) => (c, v) match {
         case (aggregator, instance) => aggregator.add(instance)
       },
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
index c0f791bce13d..359f31027172 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
@@ -141,12 +141,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 5
        n= 1000
      */
-    val regressionCoefficientsR = Vectors.dense(-0.039)
+    val coefficientsR = Vectors.dense(-0.039)
     val interceptR = 1.759
     val scaleR = 1.41
 
     assert(model.intercept ~== interceptR relTol 1E-3)
-    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*
@@ -212,12 +212,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 5
        n= 1000
      */
-    val regressionCoefficientsR = Vectors.dense(-0.0844, 0.0677)
+    val coefficientsR = Vectors.dense(-0.0844, 0.0677)
     val interceptR = 1.9206
     val scaleR = 0.977
 
     assert(model.intercept ~== interceptR relTol 1E-3)
-    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*
@@ -282,12 +282,12 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
        Number of Newton-Raphson Iterations: 6
        n= 1000
      */
-    val regressionCoefficientsR = Vectors.dense(0.896, -0.709)
+    val coefficientsR = Vectors.dense(0.896, -0.709)
     val interceptR = 0.0
     val scaleR = 1.52
 
     assert(model.intercept === interceptR)
-    assert(model.regressionCoefficients ~== regressionCoefficientsR relTol 1E-3)
+    assert(model.coefficients ~== coefficientsR relTol 1E-3)
     assert(model.scale ~== scaleR relTol 1E-3)
 
     /*

From f54ff19b1edd4903950cb334987a447445fa97ef Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 3 Nov 2015 08:32:37 -0800
Subject: [PATCH 469/896] [SPARK-11349][ML] Support transform string label for
 RFormula

Currently ```RFormula``` can only handle label with ```NumericType``` or ```BinaryType``` (cast it to ```DoubleType``` as the label of Linear Regression training), we should also support label of ```StringType``` which is needed for Logistic Regression (glm with family = "binomial").
For label of ```StringType```, we should use ```StringIndexer``` to transform it to 0-based index.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9302 from yanboliang/spark-11349.
---
 .../apache/spark/ml/feature/RFormula.scala    | 10 +++++++++-
 .../spark/ml/feature/RFormulaSuite.scala      | 19 +++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
index f9b840097f3e..5c43a41bee3b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/RFormula.scala
@@ -132,6 +132,14 @@ class RFormula(override val uid: String) extends Estimator[RFormulaModel] with R
       .setOutputCol($(featuresCol))
     encoderStages += new VectorAttributeRewriter($(featuresCol), prefixesToRewrite.toMap)
     encoderStages += new ColumnPruner(tempColumns.toSet)
+
+    if (dataset.schema.fieldNames.contains(resolvedFormula.label) &&
+      dataset.schema(resolvedFormula.label).dataType == StringType) {
+      encoderStages += new StringIndexer()
+        .setInputCol(resolvedFormula.label)
+        .setOutputCol($(labelCol))
+    }
+
     val pipelineModel = new Pipeline(uid).setStages(encoderStages.toArray).fit(dataset)
     copyValues(new RFormulaModel(uid, resolvedFormula, pipelineModel).setParent(this))
   }
@@ -172,7 +180,7 @@ class RFormulaModel private[feature](
   override def transformSchema(schema: StructType): StructType = {
     checkCanTransform(schema)
     val withFeatures = pipelineModel.transformSchema(schema)
-    if (hasLabelCol(schema)) {
+    if (hasLabelCol(withFeatures)) {
       withFeatures
     } else if (schema.exists(_.name == resolvedFormula.label)) {
       val nullable = schema(resolvedFormula.label).dataType match {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
index b56013008b11..dc20a5ec2152 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/RFormulaSuite.scala
@@ -107,6 +107,25 @@ class RFormulaSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(result.collect() === expected.collect())
   }
 
+  test("index string label") {
+    val formula = new RFormula().setFormula("id ~ a + b")
+    val original = sqlContext.createDataFrame(
+      Seq(("male", "foo", 4), ("female", "bar", 4), ("female", "bar", 5), ("male", "baz", 5))
+    ).toDF("id", "a", "b")
+    val model = formula.fit(original)
+    val result = model.transform(original)
+    val resultSchema = model.transformSchema(original.schema)
+    val expected = sqlContext.createDataFrame(
+      Seq(
+        ("male", "foo", 4, Vectors.dense(0.0, 1.0, 4.0), 1.0),
+        ("female", "bar", 4, Vectors.dense(1.0, 0.0, 4.0), 0.0),
+        ("female", "bar", 5, Vectors.dense(1.0, 0.0, 5.0), 0.0),
+        ("male", "baz", 5, Vectors.dense(0.0, 0.0, 5.0), 1.0))
+    ).toDF("id", "a", "b", "features", "label")
+    // assert(result.schema.toString == resultSchema.toString)
+    assert(result.collect() === expected.collect())
+  }
+
   test("attribute generation") {
     val formula = new RFormula().setFormula("id ~ a + b")
     val original = sqlContext.createDataFrame(

From b2e4b314d989de8cad012bbddba703b31d8378a4 Mon Sep 17 00:00:00 2001
From: Mark Grover <grover.markgrover@gmail.com>
Date: Tue, 3 Nov 2015 08:51:40 -0800
Subject: [PATCH 470/896] [SPARK-9790][YARN] Expose in WebUI if NodeManager is
 the reason why executors were killed.

Author: Mark Grover <grover.markgrover@gmail.com>

Closes #8093 from markgrover/nm2.
---
 .../main/scala/org/apache/spark/TaskEndReason.scala   |  8 ++++++--
 .../scala/org/apache/spark/rpc/RpcEndpointRef.scala   |  4 ++--
 .../org/apache/spark/scheduler/TaskSetManager.scala   |  4 ++--
 .../cluster/CoarseGrainedSchedulerBackend.scala       |  5 +++--
 .../scheduler/cluster/YarnSchedulerBackend.scala      |  1 +
 .../scala/org/apache/spark/util/JsonProtocol.scala    | 11 ++++++++---
 .../spark/ui/jobs/JobProgressListenerSuite.scala      |  2 +-
 .../org/apache/spark/util/JsonProtocolSuite.scala     | 11 ++++++-----
 8 files changed, 29 insertions(+), 17 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/TaskEndReason.scala b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
index 18278b292ff5..13241b77bf97 100644
--- a/core/src/main/scala/org/apache/spark/TaskEndReason.scala
+++ b/core/src/main/scala/org/apache/spark/TaskEndReason.scala
@@ -223,8 +223,10 @@ case class TaskCommitDenied(
  * the task crashed the JVM.
  */
 @DeveloperApi
-case class ExecutorLostFailure(execId: String, exitCausedByApp: Boolean = true)
-  extends TaskFailedReason {
+case class ExecutorLostFailure(
+    execId: String,
+    exitCausedByApp: Boolean = true,
+    reason: Option[String]) extends TaskFailedReason {
   override def toErrorString: String = {
     val exitBehavior = if (exitCausedByApp) {
       "caused by one of the running tasks"
@@ -232,6 +234,8 @@ case class ExecutorLostFailure(execId: String, exitCausedByApp: Boolean = true)
       "unrelated to the running tasks"
     }
     s"ExecutorLostFailure (executor ${execId} exited due to an issue ${exitBehavior})"
+    s"ExecutorLostFailure (executor ${execId} exited ${exitBehavior})" +
+      reason.map { r => s" Reason: $r" }.getOrElse("")
   }
 
   override def countTowardsTaskFailures: Boolean = exitCausedByApp
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointRef.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointRef.scala
index f25710bb5bd6..623da3e9c11b 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEndpointRef.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEndpointRef.scala
@@ -67,7 +67,7 @@ private[spark] abstract class RpcEndpointRef(conf: SparkConf)
    * The default `timeout` will be used in every trial of calling `sendWithReply`. Because this
    * method retries, the message handling in the receiver side should be idempotent.
    *
-   * Note: this is a blocking action which may cost a lot of time,  so don't call it in an message
+   * Note: this is a blocking action which may cost a lot of time,  so don't call it in a message
    * loop of [[RpcEndpoint]].
    *
    * @param message the message to send
@@ -82,7 +82,7 @@ private[spark] abstract class RpcEndpointRef(conf: SparkConf)
    * retries. `timeout` will be used in every trial of calling `sendWithReply`. Because this method
    * retries, the message handling in the receiver side should be idempotent.
    *
-   * Note: this is a blocking action which may cost a lot of time, so don't call it in an message
+   * Note: this is a blocking action which may cost a lot of time, so don't call it in a message
    * loop of [[RpcEndpoint]].
    *
    * @param message the message to send
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
index 9b3fad9012ab..114468c48c44 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
@@ -802,8 +802,8 @@ private[spark] class TaskSetManager(
         case exited: ExecutorExited => exited.exitCausedByApp
         case _ => true
       }
-      handleFailedTask(
-        tid, TaskState.FAILED, ExecutorLostFailure(info.executorId, exitCausedByApp))
+      handleFailedTask(tid, TaskState.FAILED, ExecutorLostFailure(info.executorId, exitCausedByApp,
+        Some(reason.toString)))
     }
     // recalculate valid locality levels and waits when executor is lost
     recomputeLocality()
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index 439a11927026..ebce5021b19d 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -125,7 +125,6 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
             // Ignoring the task kill since the executor is not registered.
             logWarning(s"Attempted to kill task $taskId for unknown executor $executorId.")
         }
-
     }
 
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
@@ -195,7 +194,9 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     override def onDisconnected(remoteAddress: RpcAddress): Unit = {
       addressToExecutorId
         .get(remoteAddress)
-        .foreach(removeExecutor(_, SlaveLost("remote Rpc client disassociated")))
+        .foreach(removeExecutor(_, SlaveLost("Remote RPC client disassociated. Likely due to " +
+          "containers exceeding thresholds, or network issues. Check driver logs for WARN " +
+          "messages.")))
     }
 
     // Make fake resource offers on just one executor
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index cb24072d7d94..d75d6f673e84 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -175,6 +175,7 @@ private[spark] abstract class YarnSchedulerBackend(
         addWebUIFilter(filterName, filterParams, proxyBase)
 
       case RemoveExecutor(executorId, reason) =>
+        logWarning(reason.toString)
         removeExecutor(executorId, reason)
     }
 
diff --git a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
index ad6615c1124d..ee2eb58cf5e2 100644
--- a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
@@ -367,9 +367,10 @@ private[spark] object JsonProtocol {
         ("Job ID" -> taskCommitDenied.jobID) ~
         ("Partition ID" -> taskCommitDenied.partitionID) ~
         ("Attempt Number" -> taskCommitDenied.attemptNumber)
-      case ExecutorLostFailure(executorId, exitCausedByApp) =>
+      case ExecutorLostFailure(executorId, exitCausedByApp, reason) =>
         ("Executor ID" -> executorId) ~
-        ("Exit Caused By App" -> exitCausedByApp)
+        ("Exit Caused By App" -> exitCausedByApp) ~
+        ("Loss Reason" -> reason.map(_.toString))
       case _ => Utils.emptyJson
     }
     ("Reason" -> reason) ~ json
@@ -812,7 +813,11 @@ private[spark] object JsonProtocol {
       case `executorLostFailure` =>
         val exitCausedByApp = Utils.jsonOption(json \ "Exit Caused By App").map(_.extract[Boolean])
         val executorId = Utils.jsonOption(json \ "Executor ID").map(_.extract[String])
-        ExecutorLostFailure(executorId.getOrElse("Unknown"), exitCausedByApp.getOrElse(true))
+        val reason = Utils.jsonOption(json \ "Loss Reason").map(_.extract[String])
+        ExecutorLostFailure(
+          executorId.getOrElse("Unknown"),
+          exitCausedByApp.getOrElse(true),
+          reason)
       case `unknownReason` => UnknownReason
     }
   }
diff --git a/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala b/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala
index b140387d309f..e02f5a1b20fe 100644
--- a/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ui/jobs/JobProgressListenerSuite.scala
@@ -243,7 +243,7 @@ class JobProgressListenerSuite extends SparkFunSuite with LocalSparkContext with
       ExceptionFailure("Exception", "description", null, null, None, None),
       TaskResultLost,
       TaskKilled,
-      ExecutorLostFailure("0"),
+      ExecutorLostFailure("0", true, Some("Induced failure")),
       UnknownReason)
     var failCount = 0
     for (reason <- taskFailedReasons) {
diff --git a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
index 86137f259c13..953456c2caa8 100644
--- a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
@@ -152,7 +152,7 @@ class JsonProtocolSuite extends SparkFunSuite {
     testTaskEndReason(TaskResultLost)
     testTaskEndReason(TaskKilled)
     testTaskEndReason(TaskCommitDenied(2, 3, 4))
-    testTaskEndReason(ExecutorLostFailure("100", true))
+    testTaskEndReason(ExecutorLostFailure("100", true, Some("Induced failure")))
     testTaskEndReason(UnknownReason)
 
     // BlockId
@@ -296,10 +296,10 @@ class JsonProtocolSuite extends SparkFunSuite {
 
   test("ExecutorLostFailure backward compatibility") {
     // ExecutorLostFailure in Spark 1.1.0 does not have an "Executor ID" property.
-    val executorLostFailure = ExecutorLostFailure("100", true)
+    val executorLostFailure = ExecutorLostFailure("100", true, Some("Induced failure"))
     val oldEvent = JsonProtocol.taskEndReasonToJson(executorLostFailure)
       .removeField({ _._1 == "Executor ID" })
-    val expectedExecutorLostFailure = ExecutorLostFailure("Unknown", true)
+    val expectedExecutorLostFailure = ExecutorLostFailure("Unknown", true, Some("Induced failure"))
     assert(expectedExecutorLostFailure === JsonProtocol.taskEndReasonFromJson(oldEvent))
   }
 
@@ -603,10 +603,11 @@ class JsonProtocolSuite extends SparkFunSuite {
         assert(jobId1 === jobId2)
         assert(partitionId1 === partitionId2)
         assert(attemptNumber1 === attemptNumber2)
-      case (ExecutorLostFailure(execId1, exit1CausedByApp),
-          ExecutorLostFailure(execId2, exit2CausedByApp)) =>
+      case (ExecutorLostFailure(execId1, exit1CausedByApp, reason1),
+          ExecutorLostFailure(execId2, exit2CausedByApp, reason2)) =>
         assert(execId1 === execId2)
         assert(exit1CausedByApp === exit2CausedByApp)
+        assert(reason1 === reason2)
       case (UnknownReason, UnknownReason) =>
       case _ => fail("Task end reasons don't match in types!")
     }

From ebf8b0b48deaad64f7ca27051caee763451e2623 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Tue, 3 Nov 2015 10:07:45 -0800
Subject: [PATCH 471/896] [SPARK-10978][SQL] Allow data sources to eliminate
 filters

This PR adds a new method `unhandledFilters` to `BaseRelation`. Data sources which implement this method properly may avoid the overhead of defensive filtering done by Spark SQL.

Author: Cheng Lian <lian@databricks.com>

Closes #9399 from liancheng/spark-10978.unhandled-filters.
---
 .../datasources/DataSourceStrategy.scala      | 131 ++++++++++++++----
 .../apache/spark/sql/sources/interfaces.scala |   9 ++
 .../parquet/ParquetFilterSuite.scala          |   2 +-
 .../spark/sql/sources/FilteredScanSuite.scala | 129 ++++++++++++-----
 .../SimpleTextHadoopFsRelationSuite.scala     |  47 ++++++-
 .../sql/sources/SimpleTextRelation.scala      |  65 ++++++++-
 6 files changed, 315 insertions(+), 68 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 65859865c8fb..7265d6a4de2e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -43,7 +43,8 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         l,
         projects,
         filters,
-        (a, f) => toCatalystRDD(l, a, t.buildScan(a, f))) :: Nil
+        (requestedColumns, allPredicates, _) =>
+          toCatalystRDD(l, requestedColumns, t.buildScan(requestedColumns, allPredicates))) :: Nil
 
     case PhysicalOperation(projects, filters, l @ LogicalRelation(t: PrunedFilteredScan, _)) =>
       pruneFilterProject(
@@ -266,47 +267,81 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
       relation,
       projects,
       filterPredicates,
-      (requestedColumns, pushedFilters) => {
-        scanBuilder(requestedColumns, selectFilters(pushedFilters).toArray)
+      (requestedColumns, _, pushedFilters) => {
+        scanBuilder(requestedColumns, pushedFilters.toArray)
       })
   }
 
-  // Based on Catalyst expressions.
+  // Based on Catalyst expressions. The `scanBuilder` function accepts three arguments:
+  //
+  //  1. A `Seq[Attribute]`, containing all required column attributes. Used to handle relation
+  //     traits that support column pruning (e.g. `PrunedScan` and `PrunedFilteredScan`).
+  //
+  //  2. A `Seq[Expression]`, containing all gathered Catalyst filter expressions, only used for
+  //     `CatalystScan`.
+  //
+  //  3. A `Seq[Filter]`, containing all data source `Filter`s that are converted from (possibly a
+  //     subset of) Catalyst filter expressions and can be handled by `relation`.  Used to handle
+  //     relation traits (`CatalystScan` excluded) that support filter push-down (e.g.
+  //     `PrunedFilteredScan` and `HadoopFsRelation`).
+  //
+  // Note that 2 and 3 shouldn't be used together.
   protected def pruneFilterProjectRaw(
-      relation: LogicalRelation,
-      projects: Seq[NamedExpression],
-      filterPredicates: Seq[Expression],
-      scanBuilder: (Seq[Attribute], Seq[Expression]) => RDD[InternalRow]) = {
+    relation: LogicalRelation,
+    projects: Seq[NamedExpression],
+    filterPredicates: Seq[Expression],
+    scanBuilder: (Seq[Attribute], Seq[Expression], Seq[Filter]) => RDD[InternalRow]) = {
 
     val projectSet = AttributeSet(projects.flatMap(_.references))
     val filterSet = AttributeSet(filterPredicates.flatMap(_.references))
-    val filterCondition = filterPredicates.reduceLeftOption(expressions.And)
 
-    val pushedFilters = filterPredicates.map { _ transform {
+    val candidatePredicates = filterPredicates.map { _ transform {
       case a: AttributeReference => relation.attributeMap(a) // Match original case of attributes.
     }}
 
+    val (unhandledPredicates, pushedFilters) =
+      selectFilters(relation.relation, candidatePredicates)
+
+    // A set of column attributes that are only referenced by pushed down filters.  We can eliminate
+    // them from requested columns.
+    val handledSet = {
+      val handledPredicates = filterPredicates.filterNot(unhandledPredicates.contains)
+      val unhandledSet = AttributeSet(unhandledPredicates.flatMap(_.references))
+      AttributeSet(handledPredicates.flatMap(_.references)) --
+        (projectSet ++ unhandledSet).map(relation.attributeMap)
+    }
+
+    // Combines all Catalyst filter `Expression`s that are either not convertible to data source
+    // `Filter`s or cannot be handled by `relation`.
+    val filterCondition = unhandledPredicates.reduceLeftOption(expressions.And)
+
     if (projects.map(_.toAttribute) == projects &&
         projectSet.size == projects.size &&
         filterSet.subsetOf(projectSet)) {
       // When it is possible to just use column pruning to get the right projection and
       // when the columns of this projection are enough to evaluate all filter conditions,
       // just do a scan followed by a filter, with no extra project.
-      val requestedColumns =
-        projects.asInstanceOf[Seq[Attribute]] // Safe due to if above.
-          .map(relation.attributeMap)            // Match original case of attributes.
+      val requestedColumns = projects
+        // Safe due to if above.
+        .asInstanceOf[Seq[Attribute]]
+        // Match original case of attributes.
+        .map(relation.attributeMap)
+        // Don't request columns that are only referenced by pushed filters.
+        .filterNot(handledSet.contains)
 
       val scan = execution.PhysicalRDD.createFromDataSource(
         projects.map(_.toAttribute),
-        scanBuilder(requestedColumns, pushedFilters),
+        scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
         relation.relation)
       filterCondition.map(execution.Filter(_, scan)).getOrElse(scan)
     } else {
-      val requestedColumns = (projectSet ++ filterSet).map(relation.attributeMap).toSeq
+      // Don't request columns that are only referenced by pushed filters.
+      val requestedColumns =
+        (projectSet ++ filterSet -- handledSet).map(relation.attributeMap).toSeq
 
       val scan = execution.PhysicalRDD.createFromDataSource(
         requestedColumns,
-        scanBuilder(requestedColumns, pushedFilters),
+        scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
         relation.relation)
       execution.Project(projects, filterCondition.map(execution.Filter(_, scan)).getOrElse(scan))
     }
@@ -334,11 +369,12 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
   }
 
   /**
-   * Selects Catalyst predicate [[Expression]]s which are convertible into data source [[Filter]]s,
-   * and convert them.
+   * Tries to translate a Catalyst [[Expression]] into data source [[Filter]].
+   *
+   * @return a `Some[Filter]` if the input [[Expression]] is convertible, otherwise a `None`.
    */
-  protected[sql] def selectFilters(filters: Seq[Expression]) = {
-    def translate(predicate: Expression): Option[Filter] = predicate match {
+  protected[sql] def translateFilter(predicate: Expression): Option[Filter] = {
+    predicate match {
       case expressions.EqualTo(a: Attribute, Literal(v, t)) =>
         Some(sources.EqualTo(a.name, convertToScala(v, t)))
       case expressions.EqualTo(Literal(v, t), a: Attribute) =>
@@ -387,16 +423,16 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         Some(sources.IsNotNull(a.name))
 
       case expressions.And(left, right) =>
-        (translate(left) ++ translate(right)).reduceOption(sources.And)
+        (translateFilter(left) ++ translateFilter(right)).reduceOption(sources.And)
 
       case expressions.Or(left, right) =>
         for {
-          leftFilter <- translate(left)
-          rightFilter <- translate(right)
+          leftFilter <- translateFilter(left)
+          rightFilter <- translateFilter(right)
         } yield sources.Or(leftFilter, rightFilter)
 
       case expressions.Not(child) =>
-        translate(child).map(sources.Not)
+        translateFilter(child).map(sources.Not)
 
       case expressions.StartsWith(a: Attribute, Literal(v: UTF8String, StringType)) =>
         Some(sources.StringStartsWith(a.name, v.toString))
@@ -409,7 +445,52 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
 
       case _ => None
     }
+  }
+
+  /**
+   * Selects Catalyst predicate [[Expression]]s which are convertible into data source [[Filter]]s
+   * and can be handled by `relation`.
+   *
+   * @return A pair of `Seq[Expression]` and `Seq[Filter]`. The first element contains all Catalyst
+   *         predicate [[Expression]]s that are either not convertible or cannot be handled by
+   *         `relation`. The second element contains all converted data source [[Filter]]s that can
+   *        be handled by `relation`.
+   */
+  protected[sql] def selectFilters(
+    relation: BaseRelation,
+    predicates: Seq[Expression]): (Seq[Expression], Seq[Filter]) = {
+
+    // For conciseness, all Catalyst filter expressions of type `expressions.Expression` below are
+    // called `predicate`s, while all data source filters of type `sources.Filter` are simply called
+    // `filter`s.
+
+    val translated: Seq[(Expression, Filter)] =
+      for {
+        predicate <- predicates
+        filter <- translateFilter(predicate)
+      } yield predicate -> filter
+
+    // A map from original Catalyst expressions to corresponding translated data source filters.
+    val translatedMap: Map[Expression, Filter] = translated.toMap
+
+    // Catalyst predicate expressions that cannot be translated to data source filters.
+    val unrecognizedPredicates = predicates.filterNot(translatedMap.contains)
+
+    // Data source filters that cannot be handled by `relation`
+    val unhandledFilters = relation.unhandledFilters(translatedMap.values.toArray).toSet
+
+    val (unhandled, handled) = translated.partition {
+      case (predicate, filter) =>
+        unhandledFilters.contains(filter)
+    }
+
+    // Catalyst predicate expressions that can be translated to data source filters, but cannot be
+    // handled by `relation`.
+    val (unhandledPredicates, _) = unhandled.unzip
+
+    // Translated data source filters that can be handled by `relation`
+    val (_, handledFilters) = handled.unzip
 
-    filters.flatMap(translate)
+    (unrecognizedPredicates ++ unhandledPredicates, handledFilters)
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 7a553511483f..e296d631f0f3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -233,6 +233,15 @@ abstract class BaseRelation {
    * @since 1.4.0
    */
   def needConversion: Boolean = true
+
+  /**
+   * Given an array of [[Filter]]s, returns an array of [[Filter]]s that this data source relation
+   * cannot handle.  Spark SQL will apply all returned [[Filter]]s against rows returned by this
+   * data source relation.
+   *
+   * @since 1.6.0
+   */
+  def unhandledFilters(filters: Array[Filter]): Array[Filter] = filters
 }
 
 /**
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index f88ddc77a6a4..c24c9f025dad 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -59,7 +59,7 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
       }.flatten
       assert(analyzedPredicate.nonEmpty)
 
-      val selectedFilters = DataSourceStrategy.selectFilters(analyzedPredicate)
+      val selectedFilters = analyzedPredicate.flatMap(DataSourceStrategy.translateFilter)
       assert(selectedFilters.nonEmpty)
 
       selectedFilters.foreach { pred =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
index 68ce37c00077..7541e723029b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.sources
 
+import org.apache.spark.sql.execution.datasources.LogicalRelation
+
 import scala.language.existentials
 
 import org.apache.spark.rdd.RDD
@@ -44,16 +46,39 @@ case class SimpleFilteredScan(from: Int, to: Int)(@transient val sqlContext: SQL
       StructField("b", IntegerType, nullable = false) ::
       StructField("c", StringType, nullable = false) :: Nil)
 
+  override def unhandledFilters(filters: Array[Filter]): Array[Filter] = {
+    def unhandled(filter: Filter): Boolean = {
+      filter match {
+        case EqualTo(col, v) => col == "b"
+        case EqualNullSafe(col, v) => col == "b"
+        case LessThan(col, v: Int) => col == "b"
+        case LessThanOrEqual(col, v: Int) => col == "b"
+        case GreaterThan(col, v: Int) => col == "b"
+        case GreaterThanOrEqual(col, v: Int) => col == "b"
+        case In(col, values) => col == "b"
+        case IsNull(col) => col == "b"
+        case IsNotNull(col) => col == "b"
+        case Not(pred) => unhandled(pred)
+        case And(left, right) => unhandled(left) || unhandled(right)
+        case Or(left, right) => unhandled(left) || unhandled(right)
+        case _ => false
+      }
+    }
+
+    filters.filter(unhandled)
+  }
+
   override def buildScan(requiredColumns: Array[String], filters: Array[Filter]): RDD[Row] = {
     val rowBuilders = requiredColumns.map {
       case "a" => (i: Int) => Seq(i)
       case "b" => (i: Int) => Seq(i * 2)
       case "c" => (i: Int) =>
         val c = (i - 1 + 'a').toChar.toString
-        Seq(c * 5 + c.toUpperCase() * 5)
+        Seq(c * 5 + c.toUpperCase * 5)
     }
 
     FiltersPushed.list = filters
+    ColumnsRequired.set = requiredColumns.toSet
 
     // Predicate test on integer column
     def translateFilterOnA(filter: Filter): Int => Boolean = filter match {
@@ -86,9 +111,8 @@ case class SimpleFilteredScan(from: Int, to: Int)(@transient val sqlContext: SQL
     }
 
     def eval(a: Int) = {
-      val c = (a - 1 + 'a').toChar.toString * 5 + (a - 1 + 'a').toChar.toString.toUpperCase() * 5
-      !filters.map(translateFilterOnA(_)(a)).contains(false) &&
-        !filters.map(translateFilterOnC(_)(c)).contains(false)
+      val c = (a - 1 + 'a').toChar.toString * 5 + (a - 1 + 'a').toChar.toString.toUpperCase * 5
+      filters.forall(translateFilterOnA(_)(a)) && filters.forall(translateFilterOnC(_)(c))
     }
 
     sqlContext.sparkContext.parallelize(from to to).filter(eval).map(i =>
@@ -101,6 +125,11 @@ object FiltersPushed {
   var list: Seq[Filter] = Nil
 }
 
+// Used together with `SimpleFilteredScan` to check pushed columns.
+object ColumnsRequired {
+  var set: Set[String] = Set.empty
+}
+
 class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
   protected override lazy val sql = caseInsensitiveContext.sql _
 
@@ -115,12 +144,15 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
         |  to '10'
         |)
       """.stripMargin)
+
+    // UDF for testing filter push-down
+    caseInsensitiveContext.udf.register("udf_gt3", (_: Int) > 3)
   }
 
   sqlTest(
     "SELECT * FROM oneToTenFiltered",
     (1 to 10).map(i => Row(i, i * 2, (i - 1 + 'a').toChar.toString * 5
-      + (i - 1 + 'a').toChar.toString.toUpperCase() * 5)).toSeq)
+      + (i - 1 + 'a').toChar.toString.toUpperCase * 5)).toSeq)
 
   sqlTest(
     "SELECT a, b FROM oneToTenFiltered",
@@ -202,49 +234,64 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
     "SELECT a, b, c FROM oneToTenFiltered WHERE c like '%eE%'",
     Seq(Row(5, 5 * 2, "e" * 5 + "E" * 5)))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE A = 1", 1)
-  testPushDown("SELECT a FROM oneToTenFiltered WHERE A = 1", 1)
-  testPushDown("SELECT b FROM oneToTenFiltered WHERE A = 1", 1)
-  testPushDown("SELECT a, b FROM oneToTenFiltered WHERE A = 1", 1)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a = 1", 1)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 = a", 1)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE A = 1", 1, Set("a", "b", "c"))
+  testPushDown("SELECT a FROM oneToTenFiltered WHERE A = 1", 1, Set("a"))
+  testPushDown("SELECT b FROM oneToTenFiltered WHERE A = 1", 1, Set("b"))
+  testPushDown("SELECT a, b FROM oneToTenFiltered WHERE A = 1", 1, Set("a", "b"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a = 1", 1, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 = a", 1, Set("a", "b", "c"))
+
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a > 1", 9, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a >= 2", 9, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a > 1", 9)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a >= 2", 9)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 < a", 9, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE 2 <= a", 9, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 < a", 9)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE 2 <= a", 9)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 > a", 0, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE 2 >= a", 2, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE 1 > a", 0)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE 2 >= a", 2)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 1", 0, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a <= 2", 2, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 1", 0)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a <= 2", 2)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a > 1 AND a < 10", 8, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a > 1 AND a < 10", 8)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a IN (1,3,5)", 3, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a IN (1,3,5)", 3)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a = 20", 0, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE b = 1", 10, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a = 20", 0)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE b = 1", 10)
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 5 AND a > 1", 3, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 3 OR a > 8", 4, Set("a", "b", "c"))
+  testPushDown("SELECT * FROM oneToTenFiltered WHERE NOT (a < 6)", 5, Set("a", "b", "c"))
 
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 5 AND a > 1", 3)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 3 OR a > 8", 4)
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE NOT (a < 6)", 5)
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like 'c%'", 1, Set("a", "b", "c"))
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like 'C%'", 0, Set("a", "b", "c"))
 
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like 'c%'", 1)
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like 'C%'", 0)
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%D'", 1, Set("a", "b", "c"))
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%d'", 0, Set("a", "b", "c"))
 
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%D'", 1)
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%d'", 0)
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%eE%'", 1, Set("a", "b", "c"))
+  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%Ee%'", 0, Set("a", "b", "c"))
 
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%eE%'", 1)
-  testPushDown("SELECT a, b, c FROM oneToTenFiltered WHERE c like '%Ee%'", 0)
+  testPushDown("SELECT c FROM oneToTenFiltered WHERE c = 'aaaaaAAAAA'", 1, Set("c"))
+  testPushDown("SELECT c FROM oneToTenFiltered WHERE c IN ('aaaaaAAAAA', 'foo')", 1, Set("c"))
 
-  testPushDown("SELECT c FROM oneToTenFiltered WHERE c = 'aaaaaAAAAA'", 1)
-  testPushDown("SELECT c FROM oneToTenFiltered WHERE c IN ('aaaaaAAAAA', 'foo')", 1)
+  // Columns only referenced by UDF filter must be required, as UDF filters can't be pushed down.
+  testPushDown("SELECT c FROM oneToTenFiltered WHERE udf_gt3(A)", 10, Set("a", "c"))
 
-  def testPushDown(sqlString: String, expectedCount: Int): Unit = {
+  // A query with an unconvertible filter, an unhandled filter, and a handled filter.
+  testPushDown(
+    """SELECT a
+      |  FROM oneToTenFiltered
+      | WHERE udf_gt3(b)
+      |   AND b < 16
+      |   AND c IN ('bbbbbBBBBB', 'cccccCCCCC', 'dddddDDDDD', 'foo')
+    """.stripMargin.split("\n").map(_.trim).mkString(" "), 3, Set("a", "b"))
+
+  def testPushDown(
+      sqlString: String,
+      expectedCount: Int,
+      requiredColumnNames: Set[String]): Unit = {
     test(s"PushDown Returns $expectedCount: $sqlString") {
       val queryExecution = sql(sqlString).queryExecution
       val rawPlan = queryExecution.executedPlan.collect {
@@ -254,6 +301,17 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
         case _ => fail(s"More than one PhysicalRDD found\n$queryExecution")
       }
       val rawCount = rawPlan.execute().count()
+      assert(ColumnsRequired.set === requiredColumnNames)
+
+      assert {
+        val table = caseInsensitiveContext.table("oneToTenFiltered")
+        val relation = table.queryExecution.logical.collectFirst {
+          case LogicalRelation(r, _) => r
+        }.get
+
+        // `relation` should be able to handle all pushed filters
+        relation.unhandledFilters(FiltersPushed.list.toArray).isEmpty
+      }
 
       if (rawCount != expectedCount) {
         fail(
@@ -264,4 +322,3 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
     }
   }
 }
-
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
index a3a124488d98..d945408341fc 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
@@ -18,11 +18,16 @@
 package org.apache.spark.sql.sources
 
 import org.apache.hadoop.fs.Path
-
 import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.CatalystTypeConverters
+import org.apache.spark.sql.execution.PhysicalRDD
+import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types._
 
 class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest {
+  import testImplicits._
+
   override val dataSourceName: String = classOf[SimpleTextSource].getCanonicalName
 
   // We have a very limited number of supported types at here since it is just for a
@@ -64,4 +69,44 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest {
           .load(file.getCanonicalPath))
     }
   }
+
+  private val writer = testDF.write.option("dataSchema", dataSchema.json).format(dataSourceName)
+  private val reader = sqlContext.read.option("dataSchema", dataSchema.json).format(dataSourceName)
+
+  test("unhandledFilters") {
+    withTempPath { dir =>
+
+      val path = dir.getCanonicalPath
+      writer.save(s"$path/p=0")
+      writer.save(s"$path/p=1")
+
+      val isOdd = udf((_: Int) % 2 == 1)
+      val df = reader.load(path)
+        .filter(
+          // This filter is inconvertible
+          isOdd('a) &&
+            // This filter is convertible but unhandled
+            'a > 1 &&
+            // This filter is convertible and handled
+            'b > "val_1" &&
+            // This filter references a partiiton column, won't be pushed down
+            'p === 1
+        ).select('a, 'p)
+      val rawScan = df.queryExecution.executedPlan collect {
+        case p: PhysicalRDD => p
+      } match {
+        case Seq(p) => p
+      }
+
+      val outputSchema = new StructType().add("a", IntegerType).add("p", IntegerType)
+
+      assertResult(Set((2, 1), (3, 1))) {
+        rawScan.execute().collect()
+          .map { CatalystTypeConverters.convertToScala(_, outputSchema) }
+          .map { case Row(a, p) => (a, p) }.toSet
+      }
+
+      checkAnswer(df, Row(3, 1))
+    }
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
index aeaaa3e1c522..da09e1b00ae4 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.sql.sources
 
 import java.text.NumberFormat
-import java.util.UUID
 
 import com.google.common.base.Objects
 import org.apache.hadoop.fs.{FileStatus, Path}
@@ -26,12 +25,12 @@ import org.apache.hadoop.io.{NullWritable, Text}
 import org.apache.hadoop.mapreduce.lib.output.{FileOutputFormat, TextOutputFormat}
 import org.apache.hadoop.mapreduce.{Job, RecordWriter, TaskAttemptContext}
 
-import org.apache.spark.rdd.RDD
 import org.apache.spark.deploy.SparkHadoopUtil
-import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.{Cast, Literal}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, expressions}
 import org.apache.spark.sql.types.{DataType, StructType}
-import org.apache.spark.sql.{Row, SQLContext}
+import org.apache.spark.sql.{Row, SQLContext, sources}
 
 /**
  * A simple example [[HadoopFsRelationProvider]].
@@ -124,6 +123,53 @@ class SimpleTextRelation(
     }
   }
 
+  override def buildScan(
+      requiredColumns: Array[String],
+      filters: Array[Filter],
+      inputFiles: Array[FileStatus]): RDD[Row] = {
+
+    val fields = this.dataSchema.map(_.dataType)
+    val inputAttributes = this.dataSchema.toAttributes
+    val outputAttributes = requiredColumns.flatMap(name => inputAttributes.find(_.name == name))
+    val dataSchema = this.dataSchema
+
+    val inputPaths = inputFiles.map(_.getPath).mkString(",")
+    sparkContext.textFile(inputPaths).mapPartitions { iterator =>
+      // Constructs a filter predicate to simulate filter push-down
+      val predicate = {
+        val filterCondition: Expression = filters.collect {
+          // According to `unhandledFilters`, `SimpleTextRelation` only handles `GreaterThan` filter
+          case sources.GreaterThan(column, value) =>
+            val dataType = dataSchema(column).dataType
+            val literal = Literal.create(value, dataType)
+            val attribute = inputAttributes.find(_.name == column).get
+            expressions.GreaterThan(attribute, literal)
+        }.reduceOption(expressions.And).getOrElse(Literal(true))
+        InterpretedPredicate.create(filterCondition, inputAttributes)
+      }
+
+      // Uses a simple projection to simulate column pruning
+      val projection = new InterpretedMutableProjection(outputAttributes, inputAttributes)
+      val toScala = {
+        val requiredSchema = StructType.fromAttributes(outputAttributes)
+        CatalystTypeConverters.createToScalaConverter(requiredSchema)
+      }
+
+      iterator.map { record =>
+        new GenericInternalRow(record.split(",", -1).zip(fields).map {
+          case (v, dataType) =>
+            val value = if (v == "") null else v
+            // `Cast`ed values are always of internal types (e.g. UTF8String instead of String)
+            Cast(Literal(value), dataType).eval()
+        })
+      }.filter { row =>
+        predicate(row)
+      }.map { row =>
+        toScala(projection(row)).asInstanceOf[Row]
+      }
+    }
+  }
+
   override def prepareJobForWrite(job: Job): OutputWriterFactory = new OutputWriterFactory {
     job.setOutputFormatClass(classOf[TextOutputFormat[_, _]])
 
@@ -134,6 +180,15 @@ class SimpleTextRelation(
       new SimpleTextOutputWriter(path, context)
     }
   }
+
+  // `SimpleTextRelation` only handles `GreaterThan` filter.  This is used to test filter push-down
+  // and `BaseRelation.unhandledFilters()`.
+  override def unhandledFilters(filters: Array[Filter]): Array[Filter] = {
+    filters.filter {
+      case _: GreaterThan => false
+      case _ => true
+    }
+  }
 }
 
 /**

From a9676cc7107c5df6c62a58668c4d95ced1238370 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Tue, 3 Nov 2015 11:53:10 -0800
Subject: [PATCH 472/896] [SPARK-11407][SPARKR] Add doc for running from
 RStudio

![image](https://cloud.githubusercontent.com/assets/8969467/10871746/612ba44a-80a4-11e5-99a0-40b9931dee52.png)
(This is without css, but you get the idea)
shivaram

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9401 from felixcheung/rstudioprogrammingguide.
---
 docs/sparkr.md | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/docs/sparkr.md b/docs/sparkr.md
index 497a276679f3..437bd4756c27 100644
--- a/docs/sparkr.md
+++ b/docs/sparkr.md
@@ -30,14 +30,22 @@ The entry point into SparkR is the `SparkContext` which connects your R program
 You can create a `SparkContext` using `sparkR.init` and pass in options such as the application name
 , any spark packages depended on, etc. Further, to work with DataFrames we will need a `SQLContext`,
 which can be created from the  SparkContext. If you are working from the `sparkR` shell, the
-`SQLContext` and `SparkContext` should already be created for you.
+`SQLContext` and `SparkContext` should already be created for you, and you would not need to call
+`sparkR.init`.
 
+<div data-lang="r" markdown="1">
 {% highlight r %}
 sc <- sparkR.init()
 sqlContext <- sparkRSQL.init(sc)
 {% endhighlight %}
+</div>
+
+## Starting Up from RStudio
 
-In the event you are creating `SparkContext` instead of using `sparkR` shell or `spark-submit`, you 
+You can also start SparkR from RStudio. You can connect your R program to a Spark cluster from
+RStudio, R shell, Rscript or other R IDEs. To start, make sure SPARK_HOME is set in environment
+(you can check [Sys.getenv](https://stat.ethz.ch/R-manual/R-devel/library/base/html/Sys.getenv.html)),
+load the SparkR package, and call `sparkR.init` as below. In addition to calling `sparkR.init`, you
 could also specify certain Spark driver properties. Normally these
 [Application properties](configuration.html#application-properties) and
 [Runtime Environment](configuration.html#runtime-environment) cannot be set programmatically, as the
@@ -45,9 +53,41 @@ driver JVM process would have been started, in this case SparkR takes care of th
 them, pass them as you would other configuration properties in the `sparkEnvir` argument to
 `sparkR.init()`.
 
+<div data-lang="r" markdown="1">
 {% highlight r %}
-sc <- sparkR.init("local[*]", "SparkR", "/home/spark", list(spark.driver.memory="2g"))
+if (nchar(Sys.getenv("SPARK_HOME")) < 1) {
+  Sys.setenv(SPARK_HOME = "/home/spark")
+}
+library(SparkR, lib.loc = c(file.path(Sys.getenv("SPARK_HOME"), "R", "lib")))
+sc <- sparkR.init(master = "local[*]", sparkEnvir = list(spark.driver.memory="2g"))
 {% endhighlight %}
+</div>
+
+The following options can be set in `sparkEnvir` with `sparkR.init` from RStudio:
+
+<table class="table">
+  <tr><th>Property Name</th><th>Property group</th><th><code>spark-submit</code> equivalent</th></tr>
+  <tr>
+    <td><code>spark.driver.memory</code></td>
+    <td>Application Properties</td>
+    <td><code>--driver-memory</code></td>
+  </tr>
+  <tr>
+    <td><code>spark.driver.extraClassPath</code></td>
+    <td>Runtime Environment</td>
+    <td><code>--driver-class-path</code></td>
+  </tr>
+  <tr>
+    <td><code>spark.driver.extraJavaOptions</code></td>
+    <td>Runtime Environment</td>
+    <td><code>--driver-java-options</code></td>
+  </tr>
+  <tr>
+    <td><code>spark.driver.extraLibraryPath</code></td>
+    <td>Runtime Environment</td>
+    <td><code>--driver-library-path</code></td>
+  </tr>
+</table>
 
 </div>
 

From 1d04dc95c0d3caa485936e65b0493bcc9719f27e Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 3 Nov 2015 13:33:46 -0800
Subject: [PATCH 473/896] [SPARK-11467][SQL] add Python API for stddev/variance

Add Python API for stddev/stddev_pop/stddev_samp/variance/var_pop/var_samp/skewness/kurtosis

Author: Davies Liu <davies@databricks.com>

Closes #9424 from davies/py_var.
---
 python/pyspark/sql/functions.py               | 17 ++++
 python/pyspark/sql/group.py                   | 88 +++++++++++++++++++
 .../org/apache/spark/sql/functions.scala      | 67 --------------
 3 files changed, 105 insertions(+), 67 deletions(-)

diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index fa04f4cd83b6..2f7c2f4aacd4 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -122,6 +122,21 @@ def _():
     'bitwiseNOT': 'Computes bitwise not.',
 }
 
+_functions_1_6 = {
+    # unary math functions
+    "stddev": "Aggregate function: returns the unbiased sample standard deviation of" +
+              " the expression in a group.",
+    "stddev_samp": "Aggregate function: returns the unbiased sample standard deviation of" +
+              " the expression in a group.",
+    "stddev_pop": "Aggregate function: returns population standard deviation of" +
+              " the expression in a group.",
+    "variance": "Aggregate function: returns the population variance of the values in a group.",
+    "var_samp": "Aggregate function: returns the unbiased variance of the values in a group.",
+    "var_pop":  "Aggregate function: returns the population variance of the values in a group.",
+    "skewness": "Aggregate function: returns the skewness of the values in a group.",
+    "kurtosis": "Aggregate function: returns the kurtosis of the values in a group."
+}
+
 # math functions that take two arguments as input
 _binary_mathfunctions = {
     'atan2': 'Returns the angle theta from the conversion of rectangular coordinates (x, y) to' +
@@ -172,6 +187,8 @@ def _():
     globals()[_name] = since(1.4)(_create_binary_mathfunction(_name, _doc))
 for _name, _doc in _window_functions.items():
     globals()[_name] = since(1.4)(_create_window_function(_name, _doc))
+for _name, _doc in _functions_1_6.items():
+    globals()[_name] = since(1.6)(_create_function(_name, _doc))
 del _name, _doc
 
 
diff --git a/python/pyspark/sql/group.py b/python/pyspark/sql/group.py
index 71c0bccc5eef..946b53e71c2c 100644
--- a/python/pyspark/sql/group.py
+++ b/python/pyspark/sql/group.py
@@ -167,6 +167,94 @@ def sum(self, *cols):
         [Row(sum(age)=7, sum(height)=165)]
         """
 
+    @df_varargs_api
+    @since(1.6)
+    def stddev(self, *cols):
+        """Compute the sample standard deviation for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().stddev('age', 'height').collect()
+        [Row(STDDEV(age)=2.12..., STDDEV(height)=3.53...)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def stddev_samp(self, *cols):
+        """Compute the sample standard deviation for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().stddev_samp('age', 'height').collect()
+        [Row(STDDEV_SAMP(age)=2.12..., STDDEV_SAMP(height)=3.53...)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def stddev_pop(self, *cols):
+        """Compute the population standard deviation for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().stddev_pop('age', 'height').collect()
+        [Row(STDDEV_POP(age)=1.5, STDDEV_POP(height)=2.5)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def variance(self, *cols):
+        """Compute the sample variance for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().variance('age', 'height').collect()
+        [Row(VARIANCE(age)=2.25, VARIANCE(height)=6.25)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def var_pop(self, *cols):
+        """Compute the sample variance for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().var_pop('age', 'height').collect()
+        [Row(VAR_POP(age)=2.25, VAR_POP(height)=6.25)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def var_samp(self, *cols):
+        """Compute the sample variance for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().var_samp('age', 'height').collect()
+        [Row(VAR_SAMP(age)=4.5, VAR_SAMP(height)=12.5)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def skewness(self, *cols):
+        """Compute the skewness for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().skewness('age', 'height').collect()
+        [Row(SKEWNESS(age)=0.0, SKEWNESS(height)=0.0)]
+        """
+
+    @df_varargs_api
+    @since(1.6)
+    def kurtosis(self, *cols):
+        """Compute the kurtosis for each numeric columns for each group.
+
+        :param cols: list of column names (string). Non-numeric columns are ignored.
+
+        >>> df3.groupBy().kurtosis('age', 'height').collect()
+        [Row(KURTOSIS(age)=-2.0, KURTOSIS(height)=-2.0)]
+        """
+
 
 def _test():
     import doctest
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 5a5c695e6ab3..c8c52831668c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -254,14 +254,6 @@ object functions {
    */
   def kurtosis(e: Column): Column = Kurtosis(e.expr)
 
-  /**
-   * Aggregate function: returns the kurtosis of the values in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def kurtosis(columnName: String): Column = kurtosis(Column(columnName))
-
   /**
    * Aggregate function: returns the last value in a group.
    *
@@ -336,14 +328,6 @@ object functions {
    */
   def skewness(e: Column): Column = Skewness(e.expr)
 
-  /**
-   * Aggregate function: returns the skewness of the values in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def skewness(columnName: String): Column = skewness(Column(columnName))
-
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
    * the expression in a group.
@@ -353,15 +337,6 @@ object functions {
    */
   def stddev(e: Column): Column = Stddev(e.expr)
 
-  /**
-   * Aggregate function: returns the unbiased sample standard deviation of
-   * the expression in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def stddev(columnName: String): Column = stddev(Column(columnName))
-
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
    * the expression in a group.
@@ -371,15 +346,6 @@ object functions {
    */
   def stddev_samp(e: Column): Column = StddevSamp(e.expr)
 
-  /**
-   * Aggregate function: returns the unbiased sample standard deviation of
-   * the expression in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def stddev_samp(columnName: String): Column = stddev_samp(Column(columnName))
-
   /**
    * Aggregate function: returns the population standard deviation of
    * the expression in a group.
@@ -389,15 +355,6 @@ object functions {
    */
   def stddev_pop(e: Column): Column = StddevPop(e.expr)
 
-  /**
-   * Aggregate function: returns the population standard deviation of
-   * the expression in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def stddev_pop(columnName: String): Column = stddev_pop(Column(columnName))
-
   /**
    * Aggregate function: returns the sum of all values in the expression.
    *
@@ -438,14 +395,6 @@ object functions {
    */
   def variance(e: Column): Column = Variance(e.expr)
 
-  /**
-   * Aggregate function: returns the population variance of the values in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def variance(columnName: String): Column = variance(Column(columnName))
-
   /**
    * Aggregate function: returns the unbiased variance of the values in a group.
    *
@@ -454,14 +403,6 @@ object functions {
    */
   def var_samp(e: Column): Column = VarianceSamp(e.expr)
 
-  /**
-   * Aggregate function: returns the unbiased variance of the values in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def var_samp(columnName: String): Column = var_samp(Column(columnName))
-
   /**
    * Aggregate function: returns the population variance of the values in a group.
    *
@@ -470,14 +411,6 @@ object functions {
    */
   def var_pop(e: Column): Column = VariancePop(e.expr)
 
-  /**
-   * Aggregate function: returns the population variance of the values in a group.
-   *
-   * @group agg_funcs
-   * @since 1.6.0
-   */
-  def var_pop(columnName: String): Column = var_pop(Column(columnName))
-
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Window functions
   //////////////////////////////////////////////////////////////////////////////////////////////

From f6fcb4874ce20a1daa91b7434cf9c0254a89e979 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 4 Nov 2015 00:15:50 +0100
Subject: [PATCH 474/896] [SPARK-11477] [SQL] support create Dataset from RDD

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9434 from cloud-fan/rdd2ds and squashes the following commits:

0892d72 [Wenchen Fan] support create Dataset from RDD
---
 .../src/main/scala/org/apache/spark/sql/SQLContext.scala | 9 +++++++++
 .../main/scala/org/apache/spark/sql/SQLImplicits.scala   | 4 ++++
 .../test/scala/org/apache/spark/sql/DatasetSuite.scala   | 7 +++++++
 3 files changed, 20 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 2cb94430e617..5ad3871093fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -499,6 +499,15 @@ class SQLContext private[sql](
     new Dataset[T](this, plan)
   }
 
+  def createDataset[T : Encoder](data: RDD[T]): Dataset[T] = {
+    val enc = encoderFor[T]
+    val attributes = enc.schema.toAttributes
+    val encoded = data.map(d => enc.toRow(d))
+    val plan = LogicalRDD(attributes, encoded)(self)
+
+    new Dataset[T](this, plan)
+  }
+
   /**
    * Creates a DataFrame from an RDD[Row]. User can specify whether the input rows should be
    * converted to Catalyst rows.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index f460a86414c4..f2904e270811 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -48,6 +48,10 @@ abstract class SQLImplicits {
   implicit def newBooleanEncoder: Encoder[Boolean] = ExpressionEncoder[Boolean](flat = true)
   implicit def newStringEncoder: Encoder[String] = ExpressionEncoder[String](flat = true)
 
+  implicit def rddToDatasetHolder[T : Encoder](rdd: RDD[T]): DatasetHolder[T] = {
+    DatasetHolder(_sqlContext.createDataset(rdd))
+  }
+
   implicit def localSeqToDatasetHolder[T : Encoder](s: Seq[T]): DatasetHolder[T] = {
     DatasetHolder(_sqlContext.createDataset(s))
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 5973fa7f2a76..3e9b621cfd67 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -34,6 +34,13 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       data: _*)
   }
 
+  test("toDS with RDD") {
+    val ds = sparkContext.makeRDD(Seq("a", "b", "c"), 3).toDS()
+    checkAnswer(
+      ds.mapPartitions(_ => Iterator(1)),
+      1, 1, 1)
+  }
+
   test("as tuple") {
     val data = Seq(("a", 1), ("b", 2)).toDF("a", "b")
     checkAnswer(

From 680b4e7bca935dc1569f35fa319bdfb01a12f7e0 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Tue, 3 Nov 2015 15:26:35 -0800
Subject: [PATCH 475/896] Fix typo in WebUI

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #9444 from jaceklaskowski/TImely-fix.
---
 core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala b/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
index 712782d27b3c..51425e599e74 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
@@ -49,7 +49,7 @@ private[ui] class StagePage(parent: StagesTab) extends WebUIPage("stage") {
             ("shuffle-read-time-proportion", "Shuffle Read Time"),
             ("executor-runtime-proportion", "Executor Computing Time"),
             ("shuffle-write-time-proportion", "Shuffle Write Time"),
-            ("serialization-time-proportion", "Result Serialization TIme"),
+            ("serialization-time-proportion", "Result Serialization Time"),
             ("getting-result-time-proportion", "Getting Result Time"))
 
           legendPairs.zipWithIndex.map {

From 53e9cee3e4e845d1f875c487215c0f22503347b1 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Tue, 3 Nov 2015 16:26:28 -0800
Subject: [PATCH 476/896] [SPARK-11466][CORE] Avoid mockito in multi-threaded
 FsHistoryProviderSuite test.

The test functionality should be the same, but without using mockito; logs don't
really say anything useful but I suspect it may be the cause of the flakiness,
since updating mocks when multiple threads may be using it doesn't work very
well. It also allows some other cleanup (= less test code in FsHistoryProvider).

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9425 from vanzin/SPARK-11466.
---
 .../deploy/history/FsHistoryProvider.scala    | 31 ++++++--------
 .../history/FsHistoryProviderSuite.scala      | 42 +++++++++----------
 2 files changed, 34 insertions(+), 39 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
index 24aa386c7212..718efc4f3bd5 100644
--- a/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala
@@ -113,35 +113,30 @@ private[history] class FsHistoryProvider(conf: SparkConf, clock: Clock)
   }
 
   // Conf option used for testing the initialization code.
-  val initThread = if (!conf.getBoolean("spark.history.testing.skipInitialize", false)) {
-      initialize(None)
-    } else {
-      null
-    }
+  val initThread = initialize()
 
-  private[history] def initialize(errorHandler: Option[Thread.UncaughtExceptionHandler]): Thread = {
+  private[history] def initialize(): Thread = {
     if (!isFsInSafeMode()) {
       startPolling()
-      return null
+      null
+    } else {
+      startSafeModeCheckThread(None)
     }
+  }
 
+  private[history] def startSafeModeCheckThread(
+      errorHandler: Option[Thread.UncaughtExceptionHandler]): Thread = {
     // Cannot probe anything while the FS is in safe mode, so spawn a new thread that will wait
     // for the FS to leave safe mode before enabling polling. This allows the main history server
     // UI to be shown (so that the user can see the HDFS status).
-    //
-    // The synchronization in the run() method is needed because of the tests; mockito can
-    // misbehave if the test is modifying the mocked methods while the thread is calling
-    // them.
     val initThread = new Thread(new Runnable() {
       override def run(): Unit = {
         try {
-          clock.synchronized {
-            while (isFsInSafeMode()) {
-              logInfo("HDFS is still in safe mode. Waiting...")
-              val deadline = clock.getTimeMillis() +
-                TimeUnit.SECONDS.toMillis(SAFEMODE_CHECK_INTERVAL_S)
-              clock.waitTillTime(deadline)
-            }
+          while (isFsInSafeMode()) {
+            logInfo("HDFS is still in safe mode. Waiting...")
+            val deadline = clock.getTimeMillis() +
+              TimeUnit.SECONDS.toMillis(SAFEMODE_CHECK_INTERVAL_S)
+            clock.waitTillTime(deadline)
           }
           startPolling()
         } catch {
diff --git a/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala b/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
index 833aab14ca2d..5cab17f8a38f 100644
--- a/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/history/FsHistoryProviderSuite.scala
@@ -41,7 +41,7 @@ import org.scalatest.concurrent.Eventually._
 import org.apache.spark.{Logging, SparkConf, SparkFunSuite}
 import org.apache.spark.io._
 import org.apache.spark.scheduler._
-import org.apache.spark.util.{JsonProtocol, ManualClock, Utils}
+import org.apache.spark.util.{Clock, JsonProtocol, ManualClock, Utils}
 
 class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matchers with Logging {
 
@@ -423,22 +423,16 @@ class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matc
 
   test("provider waits for safe mode to finish before initializing") {
     val clock = new ManualClock()
-    val conf = createTestConf().set("spark.history.testing.skipInitialize", "true")
-    val provider = spy(new FsHistoryProvider(conf, clock))
-    doReturn(true).when(provider).isFsInSafeMode()
-
-    val initThread = provider.initialize(None)
+    val provider = new SafeModeTestProvider(createTestConf(), clock)
+    val initThread = provider.initialize()
     try {
       provider.getConfig().keys should contain ("HDFS State")
 
       clock.setTime(5000)
       provider.getConfig().keys should contain ("HDFS State")
 
-      // Synchronization needed because of mockito.
-      clock.synchronized {
-        doReturn(false).when(provider).isFsInSafeMode()
-        clock.setTime(10000)
-      }
+      provider.inSafeMode = false
+      clock.setTime(10000)
 
       eventually(timeout(1 second), interval(10 millis)) {
         provider.getConfig().keys should not contain ("HDFS State")
@@ -451,18 +445,12 @@ class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matc
   test("provider reports error after FS leaves safe mode") {
     testDir.delete()
     val clock = new ManualClock()
-    val conf = createTestConf().set("spark.history.testing.skipInitialize", "true")
-    val provider = spy(new FsHistoryProvider(conf, clock))
-    doReturn(true).when(provider).isFsInSafeMode()
-
+    val provider = new SafeModeTestProvider(createTestConf(), clock)
     val errorHandler = mock(classOf[Thread.UncaughtExceptionHandler])
-    val initThread = provider.initialize(Some(errorHandler))
+    val initThread = provider.startSafeModeCheckThread(Some(errorHandler))
     try {
-      // Synchronization needed because of mockito.
-      clock.synchronized {
-        doReturn(false).when(provider).isFsInSafeMode()
-        clock.setTime(10000)
-      }
+      provider.inSafeMode = false
+      clock.setTime(10000)
 
       eventually(timeout(1 second), interval(10 millis)) {
         verify(errorHandler).uncaughtException(any(), any())
@@ -530,4 +518,16 @@ class FsHistoryProviderSuite extends SparkFunSuite with BeforeAndAfter with Matc
     log
   }
 
+  private class SafeModeTestProvider(conf: SparkConf, clock: Clock)
+    extends FsHistoryProvider(conf, clock) {
+
+    @volatile var inSafeMode = true
+
+    // Skip initialization so that we can manually start the safe mode check thread.
+    private[history] override def initialize(): Thread = null
+
+    private[history] override def isFsInSafeMode(): Boolean = inSafeMode
+
+  }
+
 }

From 5051262d4ca6a2c529c9b1ba86d54cce60a7af17 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 3 Nov 2015 16:27:56 -0800
Subject: [PATCH 477/896] [SPARK-11489][SQL] Only include common first order
 statistics in GroupedData

We added a bunch of higher order statistics such as skewness and kurtosis to GroupedData. I don't think they are common enough to justify being listed, since users can always use the normal statistics aggregate functions.

That is to say, after this change, we won't support
```scala
df.groupBy("key").kurtosis("colA", "colB")
```

However, we will still support
```scala
df.groupBy("key").agg(kurtosis(col("colA")), kurtosis(col("colB")))
```

Author: Reynold Xin <rxin@databricks.com>

Closes #9446 from rxin/SPARK-11489.
---
 python/pyspark/sql/group.py                   |  88 -----------
 .../org/apache/spark/sql/GroupedData.scala    | 146 ++++--------------
 .../apache/spark/sql/JavaDataFrameSuite.java  |   1 -
 3 files changed, 28 insertions(+), 207 deletions(-)

diff --git a/python/pyspark/sql/group.py b/python/pyspark/sql/group.py
index 946b53e71c2c..71c0bccc5eef 100644
--- a/python/pyspark/sql/group.py
+++ b/python/pyspark/sql/group.py
@@ -167,94 +167,6 @@ def sum(self, *cols):
         [Row(sum(age)=7, sum(height)=165)]
         """
 
-    @df_varargs_api
-    @since(1.6)
-    def stddev(self, *cols):
-        """Compute the sample standard deviation for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().stddev('age', 'height').collect()
-        [Row(STDDEV(age)=2.12..., STDDEV(height)=3.53...)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def stddev_samp(self, *cols):
-        """Compute the sample standard deviation for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().stddev_samp('age', 'height').collect()
-        [Row(STDDEV_SAMP(age)=2.12..., STDDEV_SAMP(height)=3.53...)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def stddev_pop(self, *cols):
-        """Compute the population standard deviation for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().stddev_pop('age', 'height').collect()
-        [Row(STDDEV_POP(age)=1.5, STDDEV_POP(height)=2.5)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def variance(self, *cols):
-        """Compute the sample variance for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().variance('age', 'height').collect()
-        [Row(VARIANCE(age)=2.25, VARIANCE(height)=6.25)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def var_pop(self, *cols):
-        """Compute the sample variance for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().var_pop('age', 'height').collect()
-        [Row(VAR_POP(age)=2.25, VAR_POP(height)=6.25)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def var_samp(self, *cols):
-        """Compute the sample variance for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().var_samp('age', 'height').collect()
-        [Row(VAR_SAMP(age)=4.5, VAR_SAMP(height)=12.5)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def skewness(self, *cols):
-        """Compute the skewness for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().skewness('age', 'height').collect()
-        [Row(SKEWNESS(age)=0.0, SKEWNESS(height)=0.0)]
-        """
-
-    @df_varargs_api
-    @since(1.6)
-    def kurtosis(self, *cols):
-        """Compute the kurtosis for each numeric columns for each group.
-
-        :param cols: list of column names (string). Non-numeric columns are ignored.
-
-        >>> df3.groupBy().kurtosis('age', 'height').collect()
-        [Row(KURTOSIS(age)=-2.0, KURTOSIS(height)=-2.0)]
-        """
-
 
 def _test():
     import doctest
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index dc96384a4d28..c2b2a4013d51 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -26,42 +26,14 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{Rollup, Cube, Aggregate}
 import org.apache.spark.sql.types.NumericType
 
-/**
- * Companion object for GroupedData
- */
-private[sql] object GroupedData {
-  def apply(
-      df: DataFrame,
-      groupingExprs: Seq[Expression],
-      groupType: GroupType): GroupedData = {
-    new GroupedData(df, groupingExprs, groupType: GroupType)
-  }
-
-  /**
-   * The Grouping Type
-   */
-  private[sql] trait GroupType
-
-  /**
-   * To indicate it's the GroupBy
-   */
-  private[sql] object GroupByType extends GroupType
-
-  /**
-   * To indicate it's the CUBE
-   */
-  private[sql] object CubeType extends GroupType
-
-  /**
-   * To indicate it's the ROLLUP
-   */
-  private[sql] object RollupType extends GroupType
-}
 
 /**
  * :: Experimental ::
  * A set of methods for aggregations on a [[DataFrame]], created by [[DataFrame.groupBy]].
  *
+ * The main method is the agg function, which has multiple variants. This class also contains
+ * convenience some first order statistics such as mean, sum for convenience.
+ *
  * @since 1.3.0
  */
 @Experimental
@@ -124,7 +96,7 @@ class GroupedData protected[sql](
       case "avg" | "average" | "mean" => Average
       case "max" => Max
       case "min" => Min
-      case "stddev" => Stddev
+      case "stddev" | "std" => Stddev
       case "stddev_pop" => StddevPop
       case "stddev_samp" => StddevSamp
       case "variance" => Variance
@@ -255,30 +227,6 @@ class GroupedData protected[sql](
     aggregateNumericColumns(colNames : _*)(Average)
   }
 
-  /**
-   * Compute the skewness for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the skewness values for them.
-   *
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def skewness(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(Skewness)
-  }
-
-  /**
-   * Compute the kurtosis for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the kurtosis values for them.
-   *
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def kurtosis(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(Kurtosis)
-  }
-
   /**
    * Compute the max value for each numeric columns for each group.
    * The resulting [[DataFrame]] will also contain the grouping columns.
@@ -316,86 +264,48 @@ class GroupedData protected[sql](
   }
 
   /**
-   * Compute the sample standard deviation for each numeric columns for each group.
+   * Compute the sum for each numeric columns for each group.
    * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the stddev for them.
+   * When specified columns are given, only compute the sum for them.
    *
-   * @since 1.6.0
+   * @since 1.3.0
    */
   @scala.annotation.varargs
-  def stddev(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(Stddev)
+  def sum(colNames: String*): DataFrame = {
+    aggregateNumericColumns(colNames : _*)(Sum)
   }
+}
 
-  /**
-   * Compute the population standard deviation for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the stddev for them.
-   *
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def stddev_pop(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(StddevPop)
-  }
 
-  /**
-   * Compute the sample standard deviation for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the stddev for them.
-   *
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def stddev_samp(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(StddevSamp)
+/**
+ * Companion object for GroupedData.
+ */
+private[sql] object GroupedData {
+
+  def apply(
+      df: DataFrame,
+      groupingExprs: Seq[Expression],
+      groupType: GroupType): GroupedData = {
+    new GroupedData(df, groupingExprs, groupType: GroupType)
   }
 
   /**
-   * Compute the sum for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the sum for them.
-   *
-   * @since 1.3.0
+   * The Grouping Type
    */
-  @scala.annotation.varargs
-  def sum(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(Sum)
-  }
+  private[sql] trait GroupType
 
   /**
-   * Compute the sample variance for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the variance for them.
-   *
-   * @since 1.6.0
+   * To indicate it's the GroupBy
    */
-  @scala.annotation.varargs
-  def variance(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(Variance)
-  }
+  private[sql] object GroupByType extends GroupType
 
   /**
-   * Compute the population variance for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the variance for them.
-   *
-   * @since 1.6.0
+   * To indicate it's the CUBE
    */
-  @scala.annotation.varargs
-  def var_pop(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(VariancePop)
-  }
+  private[sql] object CubeType extends GroupType
 
   /**
-   * Compute the sample variance for each numeric columns for each group.
-   * The resulting [[DataFrame]] will also contain the grouping columns.
-   * When specified columns are given, only compute the variance for them.
-   *
-   * @since 1.6.0
+   * To indicate it's the ROLLUP
    */
-  @scala.annotation.varargs
-  def var_samp(colNames: String*): DataFrame = {
-    aggregateNumericColumns(colNames : _*)(VarianceSamp)
-  }
+  private[sql] object RollupType extends GroupType
 }
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index a1a3fdbb486e..49f516e86d75 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -91,7 +91,6 @@ public void testVarargMethods() {
     df.groupBy().mean("key");
     df.groupBy().max("key");
     df.groupBy().min("key");
-    df.groupBy().stddev("key");
     df.groupBy().sum("key");
 
     // Varargs in column expressions

From d648a4ad546eb05deab1005e92b815b2cbea621b Mon Sep 17 00:00:00 2001
From: lewuathe <lewuathe@me.com>
Date: Tue, 3 Nov 2015 16:38:22 -0800
Subject: [PATCH 478/896] [DOC] Missing link to R DataFrame API doc

Author: lewuathe <lewuathe@me.com>
Author: Lewuathe <lewuathe@me.com>

Closes #9394 from Lewuathe/missing-link-to-R-dataframe.
---
 R/pkg/R/DataFrame.R           | 105 +++++++++++++++++++++++++++++++---
 docs/sql-programming-guide.md |   2 +-
 2 files changed, 98 insertions(+), 9 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 87a2c66ffd2a..df5bc8137187 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -23,15 +23,23 @@ NULL
 setOldClass("jobj")
 
 #' @title S4 class that represents a DataFrame
-#' @description DataFrames can be created using functions like
-#'              \code{jsonFile}, \code{table} etc.
+#' @description DataFrames can be created using functions like \link{createDataFrame},
+#'              \link{jsonFile}, \link{table} etc.
+#' @family dataframe_funcs
 #' @rdname DataFrame
-#' @seealso jsonFile, table
 #' @docType class
 #'
 #' @slot env An R environment that stores bookkeeping states of the DataFrame
 #' @slot sdf A Java object reference to the backing Scala DataFrame
+#' @seealso \link{createDataFrame}, \link{jsonFile}, \link{table}
+#' @seealso \url{https://spark.apache.org/docs/latest/sparkr.html#sparkr-dataframes}
 #' @export
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' df <- createDataFrame(sqlContext, faithful)
+#'}
 setClass("DataFrame",
          slots = list(env = "environment",
                       sdf = "jobj"))
@@ -46,7 +54,6 @@ setMethod("initialize", "DataFrame", function(.Object, sdf, isCached) {
 
 #' @rdname DataFrame
 #' @export
-#'
 #' @param sdf A Java object reference to the backing Scala DataFrame
 #' @param isCached TRUE if the dataFrame is cached
 dataFrame <- function(sdf, isCached = FALSE) {
@@ -61,6 +68,7 @@ dataFrame <- function(sdf, isCached = FALSE) {
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname printSchema
 #' @name printSchema
 #' @export
@@ -85,6 +93,7 @@ setMethod("printSchema",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname schema
 #' @name schema
 #' @export
@@ -108,6 +117,7 @@ setMethod("schema",
 #'
 #' @param x A SparkSQL DataFrame
 #' @param extended Logical. If extended is False, explain() only prints the physical plan.
+#' @family dataframe_funcs
 #' @rdname explain
 #' @name explain
 #' @export
@@ -138,6 +148,7 @@ setMethod("explain",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname isLocal
 #' @name isLocal
 #' @export
@@ -162,6 +173,7 @@ setMethod("isLocal",
 #' @param x A SparkSQL DataFrame
 #' @param numRows The number of rows to print. Defaults to 20.
 #'
+#' @family dataframe_funcs
 #' @rdname showDF
 #' @name showDF
 #' @export
@@ -186,6 +198,7 @@ setMethod("showDF",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname show
 #' @name show
 #' @export
@@ -212,6 +225,7 @@ setMethod("show", "DataFrame",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname dtypes
 #' @name dtypes
 #' @export
@@ -237,6 +251,7 @@ setMethod("dtypes",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname columns
 #' @name columns
 #' @aliases names
@@ -257,6 +272,7 @@ setMethod("columns",
             })
           })
 
+#' @family dataframe_funcs
 #' @rdname columns
 #' @name names
 setMethod("names",
@@ -265,6 +281,7 @@ setMethod("names",
             columns(x)
           })
 
+#' @family dataframe_funcs
 #' @rdname columns
 #' @name names<-
 setMethod("names<-",
@@ -283,6 +300,7 @@ setMethod("names<-",
 #' @param x A SparkSQL DataFrame
 #' @param tableName A character vector containing the name of the table
 #'
+#' @family dataframe_funcs
 #' @rdname registerTempTable
 #' @name registerTempTable
 #' @export
@@ -310,6 +328,7 @@ setMethod("registerTempTable",
 #' @param overwrite A logical argument indicating whether or not to overwrite
 #' the existing rows in the table.
 #'
+#' @family dataframe_funcs
 #' @rdname insertInto
 #' @name insertInto
 #' @export
@@ -334,6 +353,7 @@ setMethod("insertInto",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname cache
 #' @name cache
 #' @export
@@ -360,6 +380,8 @@ setMethod("cache",
 #' \url{http://spark.apache.org/docs/latest/programming-guide.html#rdd-persistence}.
 #'
 #' @param x The DataFrame to persist
+#'
+#' @family dataframe_funcs
 #' @rdname persist
 #' @name persist
 #' @export
@@ -386,6 +408,8 @@ setMethod("persist",
 #'
 #' @param x The DataFrame to unpersist
 #' @param blocking Whether to block until all blocks are deleted
+#'
+#' @family dataframe_funcs
 #' @rdname unpersist-methods
 #' @name unpersist
 #' @export
@@ -412,6 +436,8 @@ setMethod("unpersist",
 #'
 #' @param x A SparkSQL DataFrame
 #' @param numPartitions The number of partitions to use.
+#'
+#' @family dataframe_funcs
 #' @rdname repartition
 #' @name repartition
 #' @export
@@ -435,8 +461,10 @@ setMethod("repartition",
 # Convert the rows of a DataFrame into JSON objects and return an RDD where
 # each element contains a JSON string.
 #
-#@param x A SparkSQL DataFrame
+# @param x A SparkSQL DataFrame
 # @return A StringRRDD of JSON objects
+#
+# @family dataframe_funcs
 # @rdname tojson
 # @export
 # @examples
@@ -462,6 +490,8 @@ setMethod("toJSON",
 #'
 #' @param x A SparkSQL DataFrame
 #' @param path The directory where the file is saved
+#'
+#' @family dataframe_funcs
 #' @rdname saveAsParquetFile
 #' @name saveAsParquetFile
 #' @export
@@ -484,6 +514,8 @@ setMethod("saveAsParquetFile",
 #' Return a new DataFrame containing the distinct rows in this DataFrame.
 #'
 #' @param x A SparkSQL DataFrame
+#'
+#' @family dataframe_funcs
 #' @rdname distinct
 #' @name distinct
 #' @export
@@ -506,6 +538,7 @@ setMethod("distinct",
 #
 #' @description Returns a new DataFrame containing distinct rows in this DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname unique
 #' @name unique
 #' @aliases distinct
@@ -522,6 +555,8 @@ setMethod("unique",
 #' @param x A SparkSQL DataFrame
 #' @param withReplacement Sampling with replacement or not
 #' @param fraction The (rough) sample target fraction
+#'
+#' @family dataframe_funcs
 #' @rdname sample
 #' @aliases sample_frac
 #' @export
@@ -545,6 +580,7 @@ setMethod("sample",
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname sample
 #' @name sample_frac
 setMethod("sample_frac",
@@ -560,6 +596,7 @@ setMethod("sample_frac",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname count
 #' @name count
 #' @aliases nrow
@@ -583,6 +620,7 @@ setMethod("count",
 #'
 #' @name nrow
 #'
+#' @family dataframe_funcs
 #' @rdname nrow
 #' @aliases count
 setMethod("nrow",
@@ -595,6 +633,7 @@ setMethod("nrow",
 #'
 #' @param x a SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname ncol
 #' @name ncol
 #' @export
@@ -615,6 +654,7 @@ setMethod("ncol",
 #' Returns the dimentions (number of rows and columns) of a DataFrame
 #' @param x a SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname dim
 #' @name dim
 #' @export
@@ -637,6 +677,8 @@ setMethod("dim",
 #' @param x A SparkSQL DataFrame
 #' @param stringsAsFactors (Optional) A logical indicating whether or not string columns
 #' should be converted to factors. FALSE by default.
+#'
+#' @family dataframe_funcs
 #' @rdname collect
 #' @name collect
 #' @export
@@ -704,6 +746,7 @@ setMethod("collect",
 #' @param num The number of rows to return
 #' @return A new DataFrame containing the number of rows specified.
 #'
+#' @family dataframe_funcs
 #' @rdname limit
 #' @name limit
 #' @export
@@ -724,6 +767,7 @@ setMethod("limit",
 
 #' Take the first NUM rows of a DataFrame and return a the results as a data.frame
 #'
+#' @family dataframe_funcs
 #' @rdname take
 #' @name take
 #' @export
@@ -752,6 +796,7 @@ setMethod("take",
 #' @param num The number of rows to return. Default is 6.
 #' @return A data.frame
 #'
+#' @family dataframe_funcs
 #' @rdname head
 #' @name head
 #' @export
@@ -774,6 +819,7 @@ setMethod("head",
 #'
 #' @param x A SparkSQL DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname first
 #' @name first
 #' @export
@@ -797,6 +843,7 @@ setMethod("first",
 #
 # @param x A Spark DataFrame
 #
+# @family dataframe_funcs
 # @rdname DataFrame
 # @export
 # @examples
@@ -827,6 +874,7 @@ setMethod("toRDD",
 #' @return a GroupedData
 #' @seealso GroupedData
 #' @aliases group_by
+#' @family dataframe_funcs
 #' @rdname groupBy
 #' @name groupBy
 #' @export
@@ -851,6 +899,7 @@ setMethod("groupBy",
              groupedData(sgd)
            })
 
+#' @family dataframe_funcs
 #' @rdname groupBy
 #' @name group_by
 setMethod("group_by",
@@ -864,6 +913,7 @@ setMethod("group_by",
 #' Compute aggregates by specifying a list of columns
 #'
 #' @param x a DataFrame
+#' @family dataframe_funcs
 #' @rdname agg
 #' @name agg
 #' @aliases summarize
@@ -874,6 +924,7 @@ setMethod("agg",
             agg(groupBy(x), ...)
           })
 
+#' @family dataframe_funcs
 #' @rdname agg
 #' @name summarize
 setMethod("summarize",
@@ -889,6 +940,7 @@ setMethod("summarize",
 # the requested map function.                                                     #
 ###################################################################################
 
+# @family dataframe_funcs
 # @rdname lapply
 setMethod("lapply",
           signature(X = "DataFrame", FUN = "function"),
@@ -897,6 +949,7 @@ setMethod("lapply",
             lapply(rdd, FUN)
           })
 
+# @family dataframe_funcs
 # @rdname lapply
 setMethod("map",
           signature(X = "DataFrame", FUN = "function"),
@@ -904,6 +957,7 @@ setMethod("map",
             lapply(X, FUN)
           })
 
+# @family dataframe_funcs
 # @rdname flatMap
 setMethod("flatMap",
           signature(X = "DataFrame", FUN = "function"),
@@ -911,7 +965,7 @@ setMethod("flatMap",
             rdd <- toRDD(X)
             flatMap(rdd, FUN)
           })
-
+# @family dataframe_funcs
 # @rdname lapplyPartition
 setMethod("lapplyPartition",
           signature(X = "DataFrame", FUN = "function"),
@@ -920,6 +974,7 @@ setMethod("lapplyPartition",
             lapplyPartition(rdd, FUN)
           })
 
+# @family dataframe_funcs
 # @rdname lapplyPartition
 setMethod("mapPartitions",
           signature(X = "DataFrame", FUN = "function"),
@@ -927,6 +982,7 @@ setMethod("mapPartitions",
             lapplyPartition(X, FUN)
           })
 
+# @family dataframe_funcs
 # @rdname foreach
 setMethod("foreach",
           signature(x = "DataFrame", func = "function"),
@@ -935,6 +991,7 @@ setMethod("foreach",
             foreach(rdd, func)
           })
 
+# @family dataframe_funcs
 # @rdname foreach
 setMethod("foreachPartition",
           signature(x = "DataFrame", func = "function"),
@@ -1034,6 +1091,7 @@ setMethod("[", signature(x = "DataFrame", i = "Column"),
 #' @param select expression for the single Column or a list of columns to select from the DataFrame
 #' @return A new DataFrame containing only the rows that meet the condition with selected columns
 #' @export
+#' @family dataframe_funcs
 #' @rdname subset
 #' @name subset
 #' @aliases [
@@ -1064,6 +1122,7 @@ setMethod("subset", signature(x = "DataFrame"),
 #' @param col A list of columns or single Column or name
 #' @return A new DataFrame with selected columns
 #' @export
+#' @family dataframe_funcs
 #' @rdname select
 #' @name select
 #' @family subsetting functions
@@ -1091,6 +1150,7 @@ setMethod("select", signature(x = "DataFrame", col = "character"),
             }
           })
 
+#' @family dataframe_funcs
 #' @rdname select
 #' @export
 setMethod("select", signature(x = "DataFrame", col = "Column"),
@@ -1102,6 +1162,7 @@ setMethod("select", signature(x = "DataFrame", col = "Column"),
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname select
 #' @export
 setMethod("select",
@@ -1126,6 +1187,7 @@ setMethod("select",
 #' @param expr A string containing a SQL expression
 #' @param ... Additional expressions
 #' @return A DataFrame
+#' @family dataframe_funcs
 #' @rdname selectExpr
 #' @name selectExpr
 #' @export
@@ -1153,6 +1215,7 @@ setMethod("selectExpr",
 #' @param colName A string containing the name of the new column.
 #' @param col A Column expression.
 #' @return A DataFrame with the new column added.
+#' @family dataframe_funcs
 #' @rdname withColumn
 #' @name withColumn
 #' @aliases mutate transform
@@ -1178,6 +1241,7 @@ setMethod("withColumn",
 #' @param .data A DataFrame
 #' @param col a named argument of the form name = col
 #' @return A new DataFrame with the new columns added.
+#' @family dataframe_funcs
 #' @rdname withColumn
 #' @name mutate
 #' @aliases withColumn transform
@@ -1211,6 +1275,7 @@ setMethod("mutate",
           })
 
 #' @export
+#' @family dataframe_funcs
 #' @rdname withColumn
 #' @name transform
 #' @aliases withColumn mutate
@@ -1228,6 +1293,7 @@ setMethod("transform",
 #' @param existingCol The name of the column you want to change.
 #' @param newCol The new column name.
 #' @return A DataFrame with the column name changed.
+#' @family dataframe_funcs
 #' @rdname withColumnRenamed
 #' @name withColumnRenamed
 #' @export
@@ -1259,6 +1325,7 @@ setMethod("withColumnRenamed",
 #' @param x A DataFrame
 #' @param newCol A named pair of the form new_column_name = existing_column
 #' @return A DataFrame with the column name changed.
+#' @family dataframe_funcs
 #' @rdname withColumnRenamed
 #' @name rename
 #' @aliases withColumnRenamed
@@ -1303,6 +1370,7 @@ setClassUnion("characterOrColumn", c("character", "Column"))
 #' @param decreasing A logical argument indicating sorting order for columns when
 #'                   a character vector is specified for col
 #' @return A DataFrame where all elements are sorted.
+#' @family dataframe_funcs
 #' @rdname arrange
 #' @name arrange
 #' @aliases orderby
@@ -1329,6 +1397,7 @@ setMethod("arrange",
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname arrange
 #' @export
 setMethod("arrange",
@@ -1360,6 +1429,7 @@ setMethod("arrange",
             do.call("arrange", c(x, jcols))
           })
 
+#' @family dataframe_funcs
 #' @rdname arrange
 #' @name orderby
 setMethod("orderBy",
@@ -1376,6 +1446,7 @@ setMethod("orderBy",
 #' @param condition The condition to filter on. This may either be a Column expression
 #' or a string containing a SQL statement
 #' @return A DataFrame containing only the rows that meet the condition.
+#' @family dataframe_funcs
 #' @rdname filter
 #' @name filter
 #' @family subsetting functions
@@ -1399,6 +1470,7 @@ setMethod("filter",
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname filter
 #' @name where
 setMethod("where",
@@ -1419,6 +1491,7 @@ setMethod("where",
 #' 'inner', 'outer', 'full', 'fullouter', leftouter', 'left_outer', 'left',
 #' 'right_outer', 'rightouter', 'right', and 'leftsemi'. The default joinType is "inner".
 #' @return A DataFrame containing the result of the join operation.
+#' @family dataframe_funcs
 #' @rdname join
 #' @name join
 #' @export
@@ -1477,6 +1550,7 @@ setMethod("join",
 #'   be returned. If all.x is set to FALSE and all.y is set to TRUE, a right
 #'   outer join will be returned. If all.x and all.y are set to TRUE, a full
 #'   outer join will be returned.
+#' @family dataframe_funcs
 #' @rdname merge
 #' @export
 #' @examples
@@ -1608,6 +1682,7 @@ generateAliasesForIntersectedCols <- function (x, intersectedColNames, suffix) {
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the union.
+#' @family dataframe_funcs
 #' @rdname unionAll
 #' @name unionAll
 #' @export
@@ -1627,9 +1702,10 @@ setMethod("unionAll",
           })
 
 #' @title Union two or more DataFrames
-#
+#'
 #' @description Returns a new DataFrame containing rows of all parameters.
-#
+#'
+#' @family dataframe_funcs
 #' @rdname rbind
 #' @name rbind
 #' @aliases unionAll
@@ -1651,6 +1727,7 @@ setMethod("rbind",
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the intersect.
+#' @family dataframe_funcs
 #' @rdname intersect
 #' @name intersect
 #' @export
@@ -1677,6 +1754,7 @@ setMethod("intersect",
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the except operation.
+#' @family dataframe_funcs
 #' @rdname except
 #' @name except
 #' @export
@@ -1716,6 +1794,7 @@ setMethod("except",
 #' @param source A name for external data source
 #' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
+#' @family dataframe_funcs
 #' @rdname write.df
 #' @name write.df
 #' @aliases saveDF
@@ -1751,6 +1830,7 @@ setMethod("write.df",
             callJMethod(df@sdf, "save", source, jmode, options)
           })
 
+#' @family dataframe_funcs
 #' @rdname write.df
 #' @name saveDF
 #' @export
@@ -1781,6 +1861,7 @@ setMethod("saveDF",
 #' @param source A name for external data source
 #' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
+#' @family dataframe_funcs
 #' @rdname saveAsTable
 #' @name saveAsTable
 #' @export
@@ -1821,6 +1902,7 @@ setMethod("saveAsTable",
 #' @param col A string of name
 #' @param ... Additional expressions
 #' @return A DataFrame
+#' @family dataframe_funcs
 #' @rdname describe
 #' @name describe
 #' @aliases summary
@@ -1843,6 +1925,7 @@ setMethod("describe",
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname describe
 #' @name describe
 setMethod("describe",
@@ -1857,6 +1940,7 @@ setMethod("describe",
 #'
 #' @description Computes statistics for numeric columns of the DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname summary
 #' @name summary
 setMethod("summary",
@@ -1881,6 +1965,7 @@ setMethod("summary",
 #' @param cols Optional list of column names to consider.
 #' @return A DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname nafunctions
 #' @name dropna
 #' @aliases na.omit
@@ -1910,6 +1995,7 @@ setMethod("dropna",
             dataFrame(sdf)
           })
 
+#' @family dataframe_funcs
 #' @rdname nafunctions
 #' @name na.omit
 #' @export
@@ -1937,6 +2023,7 @@ setMethod("na.omit",
 #'             column is simply ignored.
 #' @return A DataFrame
 #'
+#' @family dataframe_funcs
 #' @rdname nafunctions
 #' @name fillna
 #' @export
@@ -2000,6 +2087,7 @@ setMethod("fillna",
 #' @title Download data from a DataFrame into a data.frame
 #' @param x a DataFrame
 #' @return a data.frame
+#' @family dataframe_funcs
 #' @rdname as.data.frame
 #' @examples \dontrun{
 #'
@@ -2020,6 +2108,7 @@ setMethod("as.data.frame",
 #' the DataFrame is searched by R when evaluating a variable, so columns in
 #' the DataFrame can be accessed by simply giving their names.
 #'
+#' @family dataframe_funcs
 #' @rdname attach
 #' @title Attach DataFrame to R search path
 #' @param what (DataFrame) The DataFrame to attach
diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index f07c9573696e..510b3599721a 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -160,7 +160,7 @@ showDF(df)
 
 ## DataFrame Operations
 
-DataFrames provide a domain-specific language for structured data manipulation in [Scala](api/scala/index.html#org.apache.spark.sql.DataFrame), [Java](api/java/index.html?org/apache/spark/sql/DataFrame.html), and [Python](api/python/pyspark.sql.html#pyspark.sql.DataFrame).
+DataFrames provide a domain-specific language for structured data manipulation in [Scala](api/scala/index.html#org.apache.spark.sql.DataFrame), [Java](api/java/index.html?org/apache/spark/sql/DataFrame.html), [Python](api/python/pyspark.sql.html#pyspark.sql.DataFrame) and [R](api/R/DataFrame.html).
 
 Here we include some basic examples of structured data processing using DataFrames:
 

From e352de0db2789919e1e0385b79f29b508a6b2b77 Mon Sep 17 00:00:00 2001
From: Nong <nong@cloudera.com>
Date: Tue, 3 Nov 2015 16:44:37 -0800
Subject: [PATCH 479/896] [SPARK-11329] [SQL] Cleanup from spark-11329 fix.

Author: Nong <nong@cloudera.com>

Closes #9442 from nongli/spark-11483.
---
 .../apache/spark/sql/catalyst/SqlParser.scala |  4 +-
 .../sql/catalyst/analysis/unresolved.scala    | 18 +----
 .../scala/org/apache/spark/sql/Column.scala   |  6 +-
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 79 +++++++++++--------
 4 files changed, 55 insertions(+), 52 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 1ba559d9e3b1..440e9e28fa78 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -477,8 +477,8 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
 
   protected lazy val baseExpression: Parser[Expression] =
     ( "*" ^^^ UnresolvedStar(None)
-    | (ident <~ "."). + <~ "*" ^^ { case target => { UnresolvedStar(Option(target)) }
-    } | primary
+    | (ident <~ "."). + <~ "*" ^^ { case target => UnresolvedStar(Option(target))}
+    | primary
    )
 
   protected lazy val signedPrimary: Parser[Expression] =
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
index 6975662e2b73..eae17c86ddc7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
@@ -183,28 +183,16 @@ case class UnresolvedStar(target: Option[Seq[String]]) extends Star with Unevalu
       case None => input.output
       // If there is a table, pick out attributes that are part of this table.
       case Some(t) => if (t.size == 1) {
-        input.output.filter(_.qualifiers.filter(resolver(_, t.head)).nonEmpty)
+        input.output.filter(_.qualifiers.exists(resolver(_, t.head)))
       } else {
         List()
       }
     }
-    if (!expandedAttributes.isEmpty) {
-      if (expandedAttributes.forall(_.isInstanceOf[NamedExpression])) {
-        return expandedAttributes
-      } else {
-        require(expandedAttributes.size == input.output.size)
-        expandedAttributes.zip(input.output).map {
-          case (e, originalAttribute) =>
-            Alias(e, originalAttribute.name)(qualifiers = originalAttribute.qualifiers)
-        }
-      }
-      return expandedAttributes
-    }
-
-    require(target.isDefined)
+    if (expandedAttributes.nonEmpty) return expandedAttributes
 
     // Try to resolve it as a struct expansion. If there is a conflict and both are possible,
     // (i.e. [name].* is both a table and a struct), the struct path can always be qualified.
+    require(target.isDefined)
     val attribute = input.resolve(target.get, resolver)
     if (attribute.isDefined) {
       // This target resolved to an attribute in child. It must be a struct. Expand it.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 3cde9d6cb470..c73f696962de 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -60,8 +60,10 @@ class Column(protected[sql] val expr: Expression) extends Logging {
 
   def this(name: String) = this(name match {
     case "*" => UnresolvedStar(None)
-    case _ if name.endsWith(".*") => UnresolvedStar(Some(UnresolvedAttribute.parseAttributeName(
-      name.substring(0, name.length - 2))))
+    case _ if name.endsWith(".*") => {
+      val parts = UnresolvedAttribute.parseAttributeName(name.substring(0, name.length - 2))
+      UnresolvedStar(Some(parts))
+    }
     case _ => UnresolvedAttribute.quotedString(name)
   })
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index ee54bff24b19..6388a8b9c372 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -25,7 +25,7 @@ import org.apache.spark.sql.catalyst.DefaultParserDialect
 import org.apache.spark.sql.catalyst.analysis.FunctionRegistry
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.execution.aggregate
-import org.apache.spark.sql.execution.joins.{SortMergeJoin, CartesianProduct}
+import org.apache.spark.sql.execution.joins.{CartesianProduct, SortMergeJoin}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SQLTestData._
 import org.apache.spark.sql.test.{SharedSQLContext, TestSQLContext}
@@ -1956,7 +1956,8 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
 
     // Try with a registered table.
     sql("select struct(a, b) as record from testData2").registerTempTable("structTable")
-    checkAnswer(sql("SELECT record.* FROM structTable"),
+    checkAnswer(
+      sql("SELECT record.* FROM structTable"),
       Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
 
     checkAnswer(sql(
@@ -2019,50 +2020,62 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
 
     // Try with a registered table
-    nestedStructData.registerTempTable("nestedStructTable")
-    checkAnswer(sql("SELECT record.* FROM nestedStructTable"),
-      nestedStructData.select($"record.*"))
-    checkAnswer(sql("SELECT record.r1 FROM nestedStructTable"),
-      nestedStructData.select($"record.r1"))
-    checkAnswer(sql("SELECT record.r1.* FROM nestedStructTable"),
-      nestedStructData.select($"record.r1.*"))
-
-    // Create paths with unusual characters.
+    withTempTable("nestedStructTable") {
+      nestedStructData.registerTempTable("nestedStructTable")
+      checkAnswer(
+        sql("SELECT record.* FROM nestedStructTable"),
+        nestedStructData.select($"record.*"))
+      checkAnswer(
+        sql("SELECT record.r1 FROM nestedStructTable"),
+        nestedStructData.select($"record.r1"))
+      checkAnswer(
+        sql("SELECT record.r1.* FROM nestedStructTable"),
+        nestedStructData.select($"record.r1.*"))
+
+      // Try resolving something not there.
+      assert(intercept[AnalysisException](sql("SELECT abc.* FROM nestedStructTable"))
+        .getMessage.contains("cannot resolve"))
+    }
+
+    // Create paths with unusual characters
     val specialCharacterPath = sql(
       """
         | SELECT struct(`col$.a_`, `a.b.c.`) as `r&&b.c` FROM
         |   (SELECT struct(a, b) as `col$.a_`, struct(b, a) as `a.b.c.` FROM testData2) tmp
       """.stripMargin)
-    specialCharacterPath.registerTempTable("specialCharacterTable")
-    checkAnswer(specialCharacterPath.select($"`r&&b.c`.*"),
-      nestedStructData.select($"record.*"))
-    checkAnswer(sql("SELECT `r&&b.c`.`col$.a_` FROM specialCharacterTable"),
-      nestedStructData.select($"record.r1"))
-    checkAnswer(sql("SELECT `r&&b.c`.`a.b.c.` FROM specialCharacterTable"),
-      nestedStructData.select($"record.r2"))
-    checkAnswer(sql("SELECT `r&&b.c`.`col$.a_`.* FROM specialCharacterTable"),
-      nestedStructData.select($"record.r1.*"))
+    withTempTable("specialCharacterTable") {
+      specialCharacterPath.registerTempTable("specialCharacterTable")
+      checkAnswer(
+        specialCharacterPath.select($"`r&&b.c`.*"),
+        nestedStructData.select($"record.*"))
+      checkAnswer(
+        sql("SELECT `r&&b.c`.`col$.a_` FROM specialCharacterTable"),
+        nestedStructData.select($"record.r1"))
+      checkAnswer(
+        sql("SELECT `r&&b.c`.`a.b.c.` FROM specialCharacterTable"),
+        nestedStructData.select($"record.r2"))
+      checkAnswer(
+        sql("SELECT `r&&b.c`.`col$.a_`.* FROM specialCharacterTable"),
+        nestedStructData.select($"record.r1.*"))
+    }
 
     // Try star expanding a scalar. This should fail.
     assert(intercept[AnalysisException](sql("select a.* from testData2")).getMessage.contains(
       "Can only star expand struct data types."))
-
-    // Try resolving something not there.
-    assert(intercept[AnalysisException](sql("SELECT abc.* FROM nestedStructTable"))
-      .getMessage.contains("cannot resolve"))
   }
 
-
   test("Struct Star Expansion - Name conflict") {
     // Create a data set that contains a naming conflict
     val nameConflict = sql("SELECT struct(a, b) as nameConflict, a as a FROM testData2")
-    nameConflict.registerTempTable("nameConflict")
-    // Unqualified should resolve to table.
-    checkAnswer(sql("SELECT nameConflict.* FROM nameConflict"),
-      Row(Row(1, 1), 1) :: Row(Row(1, 2), 1) :: Row(Row(2, 1), 2) :: Row(Row(2, 2), 2) ::
-        Row(Row(3, 1), 3) :: Row(Row(3, 2), 3) :: Nil)
-    // Qualify the struct type with the table name.
-    checkAnswer(sql("SELECT nameConflict.nameConflict.* FROM nameConflict"),
-      Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+    withTempTable("nameConflict") {
+      nameConflict.registerTempTable("nameConflict")
+      // Unqualified should resolve to table.
+      checkAnswer(sql("SELECT nameConflict.* FROM nameConflict"),
+        Row(Row(1, 1), 1) :: Row(Row(1, 2), 1) :: Row(Row(2, 1), 2) :: Row(Row(2, 2), 2) ::
+          Row(Row(3, 1), 3) :: Row(Row(3, 2), 3) :: Nil)
+      // Qualify the struct type with the table name.
+      checkAnswer(sql("SELECT nameConflict.nameConflict.* FROM nameConflict"),
+        Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
+    }
   }
 }

From 2692bdb7dbf36d6247f595d5fd0cb9cda89e1fdd Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 3 Nov 2015 20:25:58 -0800
Subject: [PATCH 480/896] [SPARK-11455][SQL] fix case sensitivity of partition
 by

depend on `caseSensitive` to do column name equality check, instead of just `==`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9410 from cloud-fan/partition.
---
 .../datasources/PartitioningUtils.scala       |  7 ++---
 .../datasources/ResolvedDataSource.scala      | 27 ++++++++++++++-----
 .../sql/execution/datasources/rules.scala     |  6 +++--
 .../org/apache/spark/sql/DataFrameSuite.scala | 10 +++++++
 4 files changed, 39 insertions(+), 11 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
index 628c5e18936c..16dc23661c07 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
@@ -287,10 +287,11 @@ private[sql] object PartitioningUtils {
 
   def validatePartitionColumnDataTypes(
       schema: StructType,
-      partitionColumns: Array[String]): Unit = {
+      partitionColumns: Array[String],
+      caseSensitive: Boolean): Unit = {
 
-    ResolvedDataSource.partitionColumnsSchema(schema, partitionColumns).foreach { field =>
-      field.dataType match {
+    ResolvedDataSource.partitionColumnsSchema(schema, partitionColumns, caseSensitive).foreach {
+      field => field.dataType match {
         case _: AtomicType => // OK
         case _ => throw new AnalysisException(s"Cannot use ${field.dataType} for partition column")
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
index 54beabbf63b5..86a306b8f941 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/ResolvedDataSource.scala
@@ -99,7 +99,8 @@ object ResolvedDataSource extends Logging {
           val maybePartitionsSchema = if (partitionColumns.isEmpty) {
             None
           } else {
-            Some(partitionColumnsSchema(schema, partitionColumns))
+            Some(partitionColumnsSchema(
+              schema, partitionColumns, sqlContext.conf.caseSensitiveAnalysis))
           }
 
           val caseInsensitiveOptions = new CaseInsensitiveMap(options)
@@ -172,14 +173,24 @@ object ResolvedDataSource extends Logging {
 
   def partitionColumnsSchema(
       schema: StructType,
-      partitionColumns: Array[String]): StructType = {
+      partitionColumns: Array[String],
+      caseSensitive: Boolean): StructType = {
+    val equality = columnNameEquality(caseSensitive)
     StructType(partitionColumns.map { col =>
-      schema.find(_.name == col).getOrElse {
+      schema.find(f => equality(f.name, col)).getOrElse {
         throw new RuntimeException(s"Partition column $col not found in schema $schema")
       }
     }).asNullable
   }
 
+  private def columnNameEquality(caseSensitive: Boolean): (String, String) => Boolean = {
+    if (caseSensitive) {
+      org.apache.spark.sql.catalyst.analysis.caseSensitiveResolution
+    } else {
+      org.apache.spark.sql.catalyst.analysis.caseInsensitiveResolution
+    }
+  }
+
   /** Create a [[ResolvedDataSource]] for saving the content of the given DataFrame. */
   def apply(
       sqlContext: SQLContext,
@@ -207,14 +218,18 @@ object ResolvedDataSource extends Logging {
           path.makeQualified(fs.getUri, fs.getWorkingDirectory)
         }
 
-        PartitioningUtils.validatePartitionColumnDataTypes(data.schema, partitionColumns)
+        val caseSensitive = sqlContext.conf.caseSensitiveAnalysis
+        PartitioningUtils.validatePartitionColumnDataTypes(
+          data.schema, partitionColumns, caseSensitive)
 
-        val dataSchema = StructType(data.schema.filterNot(f => partitionColumns.contains(f.name)))
+        val equality = columnNameEquality(caseSensitive)
+        val dataSchema = StructType(
+          data.schema.filterNot(f => partitionColumns.exists(equality(_, f.name))))
         val r = dataSource.createRelation(
           sqlContext,
           Array(outputPath.toString),
           Some(dataSchema.asNullable),
-          Some(partitionColumnsSchema(data.schema, partitionColumns)),
+          Some(partitionColumnsSchema(data.schema, partitionColumns, caseSensitive)),
           caseInsensitiveOptions)
 
         // For partitioned relation r, r.schema's column ordering can be different from the column
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
index abc016bf020d..1a8e7ab202dc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/rules.scala
@@ -140,7 +140,8 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
           // OK
         }
 
-        PartitioningUtils.validatePartitionColumnDataTypes(r.schema, part.keySet.toArray)
+        PartitioningUtils.validatePartitionColumnDataTypes(
+          r.schema, part.keySet.toArray, catalog.conf.caseSensitiveAnalysis)
 
         // Get all input data source relations of the query.
         val srcRelations = query.collect {
@@ -190,7 +191,8 @@ private[sql] case class PreWriteCheck(catalog: Catalog) extends (LogicalPlan =>
           // OK
         }
 
-        PartitioningUtils.validatePartitionColumnDataTypes(query.schema, partitionColumns)
+        PartitioningUtils.validatePartitionColumnDataTypes(
+          query.schema, partitionColumns, catalog.conf.caseSensitiveAnalysis)
 
       case _ => // OK
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index a883bcb7b101..a9e641342311 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -1118,4 +1118,14 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       if (!allSequential) throw new SparkException("Partition should contain all sequential values")
     })
   }
+
+  test("fix case sensitivity of partition by") {
+    withSQLConf(SQLConf.CASE_SENSITIVE.key -> "false") {
+      withTempPath { path =>
+        val p = path.getAbsolutePath
+        Seq(2012 -> "a").toDF("year", "val").write.partitionBy("yEAr").parquet(p)
+        checkAnswer(sqlContext.read.parquet(p).select("YeaR"), Row(2012))
+      }
+    }
+  }
 }

From 8aff36e91de0fee2f3f56c6d240bb203b5bb48ba Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Wed, 4 Nov 2015 10:49:34 +0000
Subject: [PATCH 481/896] [SPARK-2960][DEPLOY] Support executing Spark from
 symlinks (reopen)

This PR is based on the work of roji to support running Spark scripts from symlinks. Thanks for the great work roji . Would you mind taking a look at this PR, thanks a lot.

For releases like HDP and others, normally it will expose the Spark executables as symlinks and put in `PATH`, but current Spark's scripts do not support finding real path from symlink recursively, this will make spark fail to execute from symlink. This PR try to solve this issue by finding the absolute path from symlink.

Instead of using `readlink -f` like what this PR (https://github.com/apache/spark/pull/2386) implemented is that `-f` is not support for Mac, so here manually seeking the path through loop.

I've tested with Mac and Linux (Cent OS), looks fine.

This PR did not fix the scripts under `sbin` folder, not sure if it needs to be fixed also?

Please help to review, any comment is greatly appreciated.

Author: jerryshao <sshao@hortonworks.com>
Author: Shay Rojansky <roji@roji.org>

Closes #8669 from jerryshao/SPARK-2960.
---
 bin/beeline                         |  8 +++++---
 bin/load-spark-env.sh               | 32 ++++++++++++++++-------------
 bin/pyspark                         | 14 +++++++------
 bin/run-example                     | 18 ++++++++--------
 bin/spark-class                     | 15 +++++++-------
 bin/spark-shell                     |  9 +++++---
 bin/spark-sql                       |  7 +++++--
 bin/spark-submit                    |  6 ++++--
 bin/sparkR                          |  9 +++++---
 sbin/slaves.sh                      |  9 ++++----
 sbin/spark-config.sh                | 23 +++++++--------------
 sbin/spark-daemon.sh                | 23 +++++++++++----------
 sbin/spark-daemons.sh               |  9 ++++----
 sbin/start-all.sh                   | 11 +++++-----
 sbin/start-history-server.sh        | 11 +++++-----
 sbin/start-master.sh                | 17 +++++++--------
 sbin/start-mesos-dispatcher.sh      | 11 +++++-----
 sbin/start-mesos-shuffle-service.sh | 11 +++++-----
 sbin/start-shuffle-service.sh       | 11 +++++-----
 sbin/start-slave.sh                 | 18 ++++++++--------
 sbin/start-slaves.sh                | 19 ++++++++---------
 sbin/start-thriftserver.sh          | 11 +++++-----
 sbin/stop-all.sh                    | 14 ++++++-------
 sbin/stop-history-server.sh         |  7 ++++---
 sbin/stop-master.sh                 | 13 ++++++------
 sbin/stop-mesos-dispatcher.sh       |  9 ++++----
 sbin/stop-mesos-shuffle-service.sh  |  7 ++++---
 sbin/stop-shuffle-service.sh        |  7 ++++---
 sbin/stop-slave.sh                  | 15 +++++++-------
 sbin/stop-slaves.sh                 | 15 +++++++-------
 sbin/stop-thriftserver.sh           |  7 ++++---
 31 files changed, 213 insertions(+), 183 deletions(-)

diff --git a/bin/beeline b/bin/beeline
index 3fcb6df34339..1627626941a7 100755
--- a/bin/beeline
+++ b/bin/beeline
@@ -23,8 +23,10 @@
 # Enter posix mode for bash
 set -o posix
 
-# Figure out where Spark is installed
-FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
+# Figure out if SPARK_HOME is set
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 CLASS="org.apache.hive.beeline.BeeLine"
-exec "$FWDIR/bin/spark-class" $CLASS "$@"
+exec "${SPARK_HOME}/bin/spark-class" $CLASS "$@"
diff --git a/bin/load-spark-env.sh b/bin/load-spark-env.sh
index 95779e9ddbb1..eaea964ed5b3 100644
--- a/bin/load-spark-env.sh
+++ b/bin/load-spark-env.sh
@@ -20,13 +20,17 @@
 # This script loads spark-env.sh if it exists, and ensures it is only loaded once.
 # spark-env.sh is loaded from SPARK_CONF_DIR if set, or within the current directory's
 # conf/ subdirectory.
-FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
+
+# Figure out where Spark is installed
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 if [ -z "$SPARK_ENV_LOADED" ]; then
   export SPARK_ENV_LOADED=1
 
   # Returns the parent of the directory this script lives in.
-  parent_dir="$(cd "`dirname "$0"`"/..; pwd)"
+  parent_dir="${SPARK_HOME}"
 
   user_conf_dir="${SPARK_CONF_DIR:-"$parent_dir"/conf}"
 
@@ -42,18 +46,18 @@ fi
 
 if [ -z "$SPARK_SCALA_VERSION" ]; then
 
-    ASSEMBLY_DIR2="$FWDIR/assembly/target/scala-2.11"
-    ASSEMBLY_DIR1="$FWDIR/assembly/target/scala-2.10"
+  ASSEMBLY_DIR2="${SPARK_HOME}/assembly/target/scala-2.11"
+  ASSEMBLY_DIR1="${SPARK_HOME}/assembly/target/scala-2.10"
 
-    if [[ -d "$ASSEMBLY_DIR2" && -d "$ASSEMBLY_DIR1" ]]; then
-        echo -e "Presence of build for both scala versions(SCALA 2.10 and SCALA 2.11) detected." 1>&2
-        echo -e 'Either clean one of them or, export SPARK_SCALA_VERSION=2.11 in spark-env.sh.' 1>&2
-        exit 1
-    fi
+  if [[ -d "$ASSEMBLY_DIR2" && -d "$ASSEMBLY_DIR1" ]]; then
+    echo -e "Presence of build for both scala versions(SCALA 2.10 and SCALA 2.11) detected." 1>&2
+    echo -e 'Either clean one of them or, export SPARK_SCALA_VERSION=2.11 in spark-env.sh.' 1>&2
+    exit 1
+  fi
 
-    if [ -d "$ASSEMBLY_DIR2" ]; then
-        export SPARK_SCALA_VERSION="2.11"
-    else
-        export SPARK_SCALA_VERSION="2.10"
-    fi
+  if [ -d "$ASSEMBLY_DIR2" ]; then
+    export SPARK_SCALA_VERSION="2.11"
+  else
+    export SPARK_SCALA_VERSION="2.10"
+  fi
 fi
diff --git a/bin/pyspark b/bin/pyspark
index 18012ee4a0b4..5eaa17d3c201 100755
--- a/bin/pyspark
+++ b/bin/pyspark
@@ -17,9 +17,11 @@
 # limitations under the License.
 #
 
-export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-source "$SPARK_HOME"/bin/load-spark-env.sh
+source "${SPARK_HOME}"/bin/load-spark-env.sh
 export _SPARK_CMD_USAGE="Usage: ./bin/pyspark [options]"
 
 # In Spark <= 1.1, setting IPYTHON=1 would cause the driver to be launched using the `ipython`
@@ -64,12 +66,12 @@ fi
 export PYSPARK_PYTHON
 
 # Add the PySpark classes to the Python path:
-export PYTHONPATH="$SPARK_HOME/python/:$PYTHONPATH"
-export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.9-src.zip:$PYTHONPATH"
+export PYTHONPATH="${SPARK_HOME}/python/:$PYTHONPATH"
+export PYTHONPATH="${SPARK_HOME}/python/lib/py4j-0.9-src.zip:$PYTHONPATH"
 
 # Load the PySpark shell.py script when ./pyspark is used interactively:
 export OLD_PYTHONSTARTUP="$PYTHONSTARTUP"
-export PYTHONSTARTUP="$SPARK_HOME/python/pyspark/shell.py"
+export PYTHONSTARTUP="${SPARK_HOME}/python/pyspark/shell.py"
 
 # For pyspark tests
 if [[ -n "$SPARK_TESTING" ]]; then
@@ -82,4 +84,4 @@ fi
 
 export PYSPARK_DRIVER_PYTHON
 export PYSPARK_DRIVER_PYTHON_OPTS
-exec "$SPARK_HOME"/bin/spark-submit pyspark-shell-main --name "PySparkShell" "$@"
+exec "${SPARK_HOME}"/bin/spark-submit pyspark-shell-main --name "PySparkShell" "$@"
diff --git a/bin/run-example b/bin/run-example
index 798e2caeb88c..e1b0d5789bed 100755
--- a/bin/run-example
+++ b/bin/run-example
@@ -17,11 +17,13 @@
 # limitations under the License.
 #
 
-FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
-export SPARK_HOME="$FWDIR"
-EXAMPLES_DIR="$FWDIR"/examples
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
+
+EXAMPLES_DIR="${SPARK_HOME}"/examples
 
-. "$FWDIR"/bin/load-spark-env.sh
+. "${SPARK_HOME}"/bin/load-spark-env.sh
 
 if [ -n "$1" ]; then
   EXAMPLE_CLASS="$1"
@@ -34,8 +36,8 @@ else
   exit 1
 fi
 
-if [ -f "$FWDIR/RELEASE" ]; then
-  JAR_PATH="${FWDIR}/lib"
+if [ -f "${SPARK_HOME}/RELEASE" ]; then
+  JAR_PATH="${SPARK_HOME}/lib"
 else
   JAR_PATH="${EXAMPLES_DIR}/target/scala-${SPARK_SCALA_VERSION}"
 fi
@@ -44,7 +46,7 @@ JAR_COUNT=0
 
 for f in "${JAR_PATH}"/spark-examples-*hadoop*.jar; do
   if [[ ! -e "$f" ]]; then
-    echo "Failed to find Spark examples assembly in $FWDIR/lib or $FWDIR/examples/target" 1>&2
+    echo "Failed to find Spark examples assembly in ${SPARK_HOME}/lib or ${SPARK_HOME}/examples/target" 1>&2
     echo "You need to build Spark before running this program" 1>&2
     exit 1
   fi
@@ -67,7 +69,7 @@ if [[ ! $EXAMPLE_CLASS == org.apache.spark.examples* ]]; then
   EXAMPLE_CLASS="org.apache.spark.examples.$EXAMPLE_CLASS"
 fi
 
-exec "$FWDIR"/bin/spark-submit \
+exec "${SPARK_HOME}"/bin/spark-submit \
   --master $EXAMPLE_MASTER \
   --class $EXAMPLE_CLASS \
   "$SPARK_EXAMPLES_JAR" \
diff --git a/bin/spark-class b/bin/spark-class
index 8cae6ccbabe7..87d06693af4f 100755
--- a/bin/spark-class
+++ b/bin/spark-class
@@ -17,10 +17,11 @@
 # limitations under the License.
 #
 
-# Figure out where Spark is installed
-export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$SPARK_HOME"/bin/load-spark-env.sh
+. "${SPARK_HOME}"/bin/load-spark-env.sh
 
 # Find the java binary
 if [ -n "${JAVA_HOME}" ]; then
@@ -36,10 +37,10 @@ fi
 
 # Find assembly jar
 SPARK_ASSEMBLY_JAR=
-if [ -f "$SPARK_HOME/RELEASE" ]; then
-  ASSEMBLY_DIR="$SPARK_HOME/lib"
+if [ -f "${SPARK_HOME}/RELEASE" ]; then
+  ASSEMBLY_DIR="${SPARK_HOME}/lib"
 else
-  ASSEMBLY_DIR="$SPARK_HOME/assembly/target/scala-$SPARK_SCALA_VERSION"
+  ASSEMBLY_DIR="${SPARK_HOME}/assembly/target/scala-$SPARK_SCALA_VERSION"
 fi
 
 GREP_OPTIONS=
@@ -65,7 +66,7 @@ LAUNCH_CLASSPATH="$SPARK_ASSEMBLY_JAR"
 
 # Add the launcher build dir to the classpath if requested.
 if [ -n "$SPARK_PREPEND_CLASSES" ]; then
-  LAUNCH_CLASSPATH="$SPARK_HOME/launcher/target/scala-$SPARK_SCALA_VERSION/classes:$LAUNCH_CLASSPATH"
+  LAUNCH_CLASSPATH="${SPARK_HOME}/launcher/target/scala-$SPARK_SCALA_VERSION/classes:$LAUNCH_CLASSPATH"
 fi
 
 export _SPARK_ASSEMBLY="$SPARK_ASSEMBLY_JAR"
diff --git a/bin/spark-shell b/bin/spark-shell
index 00ab7afd118b..6583b5bd880e 100755
--- a/bin/spark-shell
+++ b/bin/spark-shell
@@ -28,7 +28,10 @@ esac
 # Enter posix mode for bash
 set -o posix
 
-export FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
+
 export _SPARK_CMD_USAGE="Usage: ./bin/spark-shell [options]"
 
 # SPARK-4161: scala does not assume use of the java classpath,
@@ -47,11 +50,11 @@ function main() {
     # (see https://github.com/sbt/sbt/issues/562).
     stty -icanon min 1 -echo > /dev/null 2>&1
     export SPARK_SUBMIT_OPTS="$SPARK_SUBMIT_OPTS -Djline.terminal=unix"
-    "$FWDIR"/bin/spark-submit --class org.apache.spark.repl.Main --name "Spark shell" "$@"
+    "${SPARK_HOME}"/bin/spark-submit --class org.apache.spark.repl.Main --name "Spark shell" "$@"
     stty icanon echo > /dev/null 2>&1
   else
     export SPARK_SUBMIT_OPTS
-    "$FWDIR"/bin/spark-submit --class org.apache.spark.repl.Main --name "Spark shell" "$@"
+    "${SPARK_HOME}"/bin/spark-submit --class org.apache.spark.repl.Main --name "Spark shell" "$@"
   fi
 }
 
diff --git a/bin/spark-sql b/bin/spark-sql
index 4ea7bc6e39c0..970d12cbf51d 100755
--- a/bin/spark-sql
+++ b/bin/spark-sql
@@ -17,6 +17,9 @@
 # limitations under the License.
 #
 
-export FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
+
 export _SPARK_CMD_USAGE="Usage: ./bin/spark-sql [options] [cli option]"
-exec "$FWDIR"/bin/spark-submit --class org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver "$@"
+exec "${SPARK_HOME}"/bin/spark-submit --class org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver "$@"
diff --git a/bin/spark-submit b/bin/spark-submit
index 255378b0f077..023f9c162f4b 100755
--- a/bin/spark-submit
+++ b/bin/spark-submit
@@ -17,9 +17,11 @@
 # limitations under the License.
 #
 
-SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 # disable randomized hash for string in Python 3.3+
 export PYTHONHASHSEED=0
 
-exec "$SPARK_HOME"/bin/spark-class org.apache.spark.deploy.SparkSubmit "$@"
+exec "${SPARK_HOME}"/bin/spark-class org.apache.spark.deploy.SparkSubmit "$@"
diff --git a/bin/sparkR b/bin/sparkR
index 464c29f36942..2c07a82e2173 100755
--- a/bin/sparkR
+++ b/bin/sparkR
@@ -17,7 +17,10 @@
 # limitations under the License.
 #
 
-export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
-source "$SPARK_HOME"/bin/load-spark-env.sh
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
+
+source "${SPARK_HOME}"/bin/load-spark-env.sh
 export _SPARK_CMD_USAGE="Usage: ./bin/sparkR [options]"
-exec "$SPARK_HOME"/bin/spark-submit sparkr-shell-main "$@"
+exec "${SPARK_HOME}"/bin/spark-submit sparkr-shell-main "$@"
diff --git a/sbin/slaves.sh b/sbin/slaves.sh
index cdad47ee2e59..c971aa3296b0 100755
--- a/sbin/slaves.sh
+++ b/sbin/slaves.sh
@@ -36,10 +36,11 @@ if [ $# -le 0 ]; then
   exit 1
 fi
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
 # If the slaves file is specified in the command line,
 # then it takes precedence over the definition in
@@ -65,7 +66,7 @@ then
   shift
 fi
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 if [ "$HOSTLIST" = "" ]; then
   if [ "$SPARK_SLAVES" = "" ]; then
diff --git a/sbin/spark-config.sh b/sbin/spark-config.sh
index e6bf544c1479..d8d9d00d64eb 100755
--- a/sbin/spark-config.sh
+++ b/sbin/spark-config.sh
@@ -19,21 +19,12 @@
 # should not be executable directly
 # also should not be passed any arguments, since we need original $*
 
-# resolve links - $0 may be a softlink
-this="${BASH_SOURCE:-$0}"
-common_bin="$(cd -P -- "$(dirname -- "$this")" && pwd -P)"
-script="$(basename -- "$this")"
-this="$common_bin/$script"
+# symlink and absolute path should rely on SPARK_HOME to resolve
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-# convert relative path to absolute path
-config_bin="`dirname "$this"`"
-script="`basename "$this"`"
-config_bin="`cd "$config_bin"; pwd`"
-this="$config_bin/$script"
-
-export SPARK_PREFIX="`dirname "$this"`"/..
-export SPARK_HOME="${SPARK_PREFIX}"
-export SPARK_CONF_DIR="${SPARK_CONF_DIR:-"$SPARK_HOME/conf"}"
+export SPARK_CONF_DIR="${SPARK_CONF_DIR:-"${SPARK_HOME}/conf"}"
 # Add the PySpark classes to the PYTHONPATH:
-export PYTHONPATH="$SPARK_HOME/python:$PYTHONPATH"
-export PYTHONPATH="$SPARK_HOME/python/lib/py4j-0.9-src.zip:$PYTHONPATH"
+export PYTHONPATH="${SPARK_HOME}/python:${PYTHONPATH}"
+export PYTHONPATH="${SPARK_HOME}/python/lib/py4j-0.9-src.zip:${PYTHONPATH}"
diff --git a/sbin/spark-daemon.sh b/sbin/spark-daemon.sh
index 0fbe795822fb..6ab57df40952 100755
--- a/sbin/spark-daemon.sh
+++ b/sbin/spark-daemon.sh
@@ -37,10 +37,11 @@ if [ $# -le 1 ]; then
   exit 1
 fi
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
 # get arguments
 
@@ -86,7 +87,7 @@ spark_rotate_log ()
     fi
 }
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 if [ "$SPARK_IDENT_STRING" = "" ]; then
   export SPARK_IDENT_STRING="$USER"
@@ -97,7 +98,7 @@ export SPARK_PRINT_LAUNCH_COMMAND="1"
 
 # get log directory
 if [ "$SPARK_LOG_DIR" = "" ]; then
-  export SPARK_LOG_DIR="$SPARK_HOME/logs"
+  export SPARK_LOG_DIR="${SPARK_HOME}/logs"
 fi
 mkdir -p "$SPARK_LOG_DIR"
 touch "$SPARK_LOG_DIR"/.spark_test > /dev/null 2>&1
@@ -137,7 +138,7 @@ run_command() {
 
   if [ "$SPARK_MASTER" != "" ]; then
     echo rsync from "$SPARK_MASTER"
-    rsync -a -e ssh --delete --exclude=.svn --exclude='logs/*' --exclude='contrib/hod/logs/*' "$SPARK_MASTER/" "$SPARK_HOME"
+    rsync -a -e ssh --delete --exclude=.svn --exclude='logs/*' --exclude='contrib/hod/logs/*' "$SPARK_MASTER/" "${SPARK_HOME}"
   fi
 
   spark_rotate_log "$log"
@@ -145,12 +146,12 @@ run_command() {
 
   case "$mode" in
     (class)
-      nohup nice -n "$SPARK_NICENESS" "$SPARK_PREFIX"/bin/spark-class $command "$@" >> "$log" 2>&1 < /dev/null &
+      nohup nice -n "$SPARK_NICENESS" "${SPARK_HOME}"/bin/spark-class $command "$@" >> "$log" 2>&1 < /dev/null &
       newpid="$!"
       ;;
 
     (submit)
-      nohup nice -n "$SPARK_NICENESS" "$SPARK_PREFIX"/bin/spark-submit --class $command "$@" >> "$log" 2>&1 < /dev/null &
+      nohup nice -n "$SPARK_NICENESS" "${SPARK_HOME}"/bin/spark-submit --class $command "$@" >> "$log" 2>&1 < /dev/null &
       newpid="$!"
       ;;
 
@@ -205,13 +206,13 @@ case $option in
       else
         echo $pid file is present but $command not running
         exit 1
-      fi  
+      fi
     else
       echo $command not running.
       exit 2
-    fi  
+    fi
     ;;
-  
+
   (*)
     echo $usage
     exit 1
diff --git a/sbin/spark-daemons.sh b/sbin/spark-daemons.sh
index 5d9f2bb51cae..dec2f4432df3 100755
--- a/sbin/spark-daemons.sh
+++ b/sbin/spark-daemons.sh
@@ -27,9 +27,10 @@ if [ $# -le 1 ]; then
   exit 1
 fi
 
-sbin=`dirname "$0"`
-sbin=`cd "$sbin"; pwd`
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-exec "$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin/spark-daemon.sh" "$@"
+exec "${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/sbin/spark-daemon.sh" "$@"
diff --git a/sbin/start-all.sh b/sbin/start-all.sh
index 1baf57cea09e..6217f9bf28e3 100755
--- a/sbin/start-all.sh
+++ b/sbin/start-all.sh
@@ -21,8 +21,9 @@
 # Starts the master on this node.
 # Starts a worker on each node specified in conf/slaves
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 TACHYON_STR=""
 
@@ -36,10 +37,10 @@ shift
 done
 
 # Load the Spark configuration
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
 # Start Master
-"$sbin"/start-master.sh $TACHYON_STR
+"${SPARK_HOME}/sbin"/start-master.sh $TACHYON_STR
 
 # Start Workers
-"$sbin"/start-slaves.sh $TACHYON_STR
+"${SPARK_HOME}/sbin"/start-slaves.sh $TACHYON_STR
diff --git a/sbin/start-history-server.sh b/sbin/start-history-server.sh
index 9034e5715cc8..6851d99b7e8f 100755
--- a/sbin/start-history-server.sh
+++ b/sbin/start-history-server.sh
@@ -24,10 +24,11 @@
 # Use the SPARK_HISTORY_OPTS environment variable to set history server configuration.
 #
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
-exec "$sbin"/spark-daemon.sh start org.apache.spark.deploy.history.HistoryServer 1 $@
+exec "${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.history.HistoryServer 1 $@
diff --git a/sbin/start-master.sh b/sbin/start-master.sh
index a7f5d5702fd8..c20e19a8412d 100755
--- a/sbin/start-master.sh
+++ b/sbin/start-master.sh
@@ -19,8 +19,9 @@
 
 # Starts the master on the machine this script is executed on.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 ORIGINAL_ARGS="$@"
 
@@ -39,9 +40,9 @@ case $1 in
 shift
 done
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 if [ "$SPARK_MASTER_PORT" = "" ]; then
   SPARK_MASTER_PORT=7077
@@ -55,12 +56,12 @@ if [ "$SPARK_MASTER_WEBUI_PORT" = "" ]; then
   SPARK_MASTER_WEBUI_PORT=8080
 fi
 
-"$sbin"/spark-daemon.sh start org.apache.spark.deploy.master.Master 1 \
+"${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.master.Master 1 \
   --ip $SPARK_MASTER_IP --port $SPARK_MASTER_PORT --webui-port $SPARK_MASTER_WEBUI_PORT \
   $ORIGINAL_ARGS
 
 if [ "$START_TACHYON" == "true" ]; then
-  "$sbin"/../tachyon/bin/tachyon bootstrap-conf $SPARK_MASTER_IP
-  "$sbin"/../tachyon/bin/tachyon format -s
-  "$sbin"/../tachyon/bin/tachyon-start.sh master
+  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon bootstrap-conf $SPARK_MASTER_IP
+  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon format -s
+  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon-start.sh master
 fi
diff --git a/sbin/start-mesos-dispatcher.sh b/sbin/start-mesos-dispatcher.sh
index ef1fc573d5c6..4777e1668c70 100755
--- a/sbin/start-mesos-dispatcher.sh
+++ b/sbin/start-mesos-dispatcher.sh
@@ -21,12 +21,13 @@
 # Rest server to handle driver requests for Mesos cluster mode.
 # Only one cluster dispatcher is needed per Mesos cluster.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 if [ "$SPARK_MESOS_DISPATCHER_PORT" = "" ]; then
   SPARK_MESOS_DISPATCHER_PORT=7077
@@ -37,4 +38,4 @@ if [ "$SPARK_MESOS_DISPATCHER_HOST" = "" ]; then
 fi
 
 
-"$sbin"/spark-daemon.sh start org.apache.spark.deploy.mesos.MesosClusterDispatcher 1 --host $SPARK_MESOS_DISPATCHER_HOST --port $SPARK_MESOS_DISPATCHER_PORT "$@"
+"${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.mesos.MesosClusterDispatcher 1 --host $SPARK_MESOS_DISPATCHER_HOST --port $SPARK_MESOS_DISPATCHER_PORT "$@"
diff --git a/sbin/start-mesos-shuffle-service.sh b/sbin/start-mesos-shuffle-service.sh
index 64580762c5dc..184584567602 100755
--- a/sbin/start-mesos-shuffle-service.sh
+++ b/sbin/start-mesos-shuffle-service.sh
@@ -26,10 +26,11 @@
 # Use the SPARK_SHUFFLE_OPTS environment variable to set shuffle service configuration.
 #
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
-exec "$sbin"/spark-daemon.sh start org.apache.spark.deploy.mesos.MesosExternalShuffleService 1
+exec "${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.mesos.MesosExternalShuffleService 1
diff --git a/sbin/start-shuffle-service.sh b/sbin/start-shuffle-service.sh
index 4fddcf7f95d4..793e165be6c7 100755
--- a/sbin/start-shuffle-service.sh
+++ b/sbin/start-shuffle-service.sh
@@ -24,10 +24,11 @@
 # Use the SPARK_SHUFFLE_OPTS environment variable to set shuffle server configuration.
 #
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
-exec "$sbin"/spark-daemon.sh start org.apache.spark.deploy.ExternalShuffleService 1
+exec "${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.ExternalShuffleService 1
diff --git a/sbin/start-slave.sh b/sbin/start-slave.sh
index 4c919ff76a8f..21455648d1c6 100755
--- a/sbin/start-slave.sh
+++ b/sbin/start-slave.sh
@@ -21,14 +21,14 @@
 #
 # Environment Variables
 #
-#   SPARK_WORKER_INSTANCES  The number of worker instances to run on this 
+#   SPARK_WORKER_INSTANCES  The number of worker instances to run on this
 #                           slave.  Default is 1.
-#   SPARK_WORKER_PORT       The base port number for the first worker. If set, 
+#   SPARK_WORKER_PORT       The base port number for the first worker. If set,
 #                           subsequent workers will increment this number.  If
 #                           unset, Spark will find a valid port number, but
 #                           with no guarantee of a predictable pattern.
 #   SPARK_WORKER_WEBUI_PORT The base port for the web interface of the first
-#                           worker.  Subsequent workers will increment this 
+#                           worker.  Subsequent workers will increment this
 #                           number.  Default is 8081.
 
 usage="Usage: start-slave.sh <spark-master-URL> where <spark-master-URL> is like spark://localhost:7077"
@@ -39,12 +39,13 @@ if [ $# -lt 1 ]; then
   exit 1
 fi
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 # First argument should be the master; we need to store it aside because we may
 # need to insert arguments between it and the other arguments
@@ -71,7 +72,7 @@ function start_instance {
   fi
   WEBUI_PORT=$(( $SPARK_WORKER_WEBUI_PORT + $WORKER_NUM - 1 ))
 
-  "$sbin"/spark-daemon.sh start org.apache.spark.deploy.worker.Worker $WORKER_NUM \
+  "${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.worker.Worker $WORKER_NUM \
      --webui-port "$WEBUI_PORT" $PORT_FLAG $PORT_NUM $MASTER "$@"
 }
 
@@ -82,4 +83,3 @@ else
     start_instance $(( 1 + $i )) "$@"
   done
 fi
-
diff --git a/sbin/start-slaves.sh b/sbin/start-slaves.sh
index 24d6268815ed..51ca81e053b7 100755
--- a/sbin/start-slaves.sh
+++ b/sbin/start-slaves.sh
@@ -19,16 +19,16 @@
 
 # Starts a slave instance on each machine specified in the conf/slaves file.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
-
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 START_TACHYON=false
 
 while (( "$#" )); do
 case $1 in
     --with-tachyon)
-      if [ ! -e "$sbin"/../tachyon/bin/tachyon ]; then
+      if [ ! -e "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon ]; then
         echo "Error: --with-tachyon specified, but tachyon not found."
         exit -1
       fi
@@ -38,9 +38,8 @@ case $1 in
 shift
 done
 
-. "$sbin/spark-config.sh"
-
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 # Find the port number for the master
 if [ "$SPARK_MASTER_PORT" = "" ]; then
@@ -52,11 +51,11 @@ if [ "$SPARK_MASTER_IP" = "" ]; then
 fi
 
 if [ "$START_TACHYON" == "true" ]; then
-  "$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin"/../tachyon/bin/tachyon bootstrap-conf "$SPARK_MASTER_IP"
+  "${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon bootstrap-conf "$SPARK_MASTER_IP"
 
   # set -t so we can call sudo
-  SPARK_SSH_OPTS="-o StrictHostKeyChecking=no -t" "$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin/../tachyon/bin/tachyon-start.sh" worker SudoMount \; sleep 1
+  SPARK_SSH_OPTS="-o StrictHostKeyChecking=no -t" "${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/tachyon/bin/tachyon-start.sh" worker SudoMount \; sleep 1
 fi
 
 # Launch the slaves
-"$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin/start-slave.sh" "spark://$SPARK_MASTER_IP:$SPARK_MASTER_PORT"
+"${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/sbin/start-slave.sh" "spark://$SPARK_MASTER_IP:$SPARK_MASTER_PORT"
diff --git a/sbin/start-thriftserver.sh b/sbin/start-thriftserver.sh
index 5b0aeb177fff..ad7e7c5277eb 100755
--- a/sbin/start-thriftserver.sh
+++ b/sbin/start-thriftserver.sh
@@ -23,8 +23,9 @@
 # Enter posix mode for bash
 set -o posix
 
-# Figure out where Spark is installed
-FWDIR="$(cd "`dirname "$0"`"/..; pwd)"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 # NOTE: This exact class name is matched downstream by SparkSubmit.
 # Any changes need to be reflected there.
@@ -39,10 +40,10 @@ function usage {
   pattern+="\|======="
   pattern+="\|--help"
 
-  "$FWDIR"/bin/spark-submit --help 2>&1 | grep -v Usage 1>&2
+  "${SPARK_HOME}"/bin/spark-submit --help 2>&1 | grep -v Usage 1>&2
   echo
   echo "Thrift server options:"
-  "$FWDIR"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
+  "${SPARK_HOME}"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
 }
 
 if [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
@@ -52,4 +53,4 @@ fi
 
 export SUBMIT_USAGE_FUNCTION=usage
 
-exec "$FWDIR"/sbin/spark-daemon.sh submit $CLASS 1 "$@"
+exec "${SPARK_HOME}"/sbin/spark-daemon.sh submit $CLASS 1 "$@"
diff --git a/sbin/stop-all.sh b/sbin/stop-all.sh
index 1a9abe07db84..4e476ca05cb0 100755
--- a/sbin/stop-all.sh
+++ b/sbin/stop-all.sh
@@ -20,23 +20,23 @@
 # Stop all spark daemons.
 # Run this on the master node.
 
-
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
 # Load the Spark configuration
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
 # Stop the slaves, then the master
-"$sbin"/stop-slaves.sh
-"$sbin"/stop-master.sh
+"${SPARK_HOME}/sbin"/stop-slaves.sh
+"${SPARK_HOME}/sbin"/stop-master.sh
 
 if [ "$1" == "--wait" ]
 then
   printf "Waiting for workers to shut down..."
   while true
   do
-    running=`$sbin/slaves.sh ps -ef | grep -v grep | grep deploy.worker.Worker`
+    running=`${SPARK_HOME}/sbin/slaves.sh ps -ef | grep -v grep | grep deploy.worker.Worker`
     if [ -z "$running" ]
     then
       printf "\nAll workers successfully shut down.\n"
diff --git a/sbin/stop-history-server.sh b/sbin/stop-history-server.sh
index 6e6056359510..14e3af4be910 100755
--- a/sbin/stop-history-server.sh
+++ b/sbin/stop-history-server.sh
@@ -19,7 +19,8 @@
 
 # Stops the history server on the machine this script is executed on.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.deploy.history.HistoryServer 1
+"${SPARK_HOME}/sbin/spark-daemon.sh" stop org.apache.spark.deploy.history.HistoryServer 1
diff --git a/sbin/stop-master.sh b/sbin/stop-master.sh
index 729702d92191..e57962bb354d 100755
--- a/sbin/stop-master.sh
+++ b/sbin/stop-master.sh
@@ -19,13 +19,14 @@
 
 # Stops the master on the machine this script is executed on.
 
-sbin=`dirname "$0"`
-sbin=`cd "$sbin"; pwd`
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.deploy.master.Master 1
+"${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.master.Master 1
 
-if [ -e "$sbin"/../tachyon/bin/tachyon ]; then
-  "$sbin"/../tachyon/bin/tachyon killAll tachyon.master.Master
+if [ -e "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon ]; then
+  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon killAll tachyon.master.Master
 fi
diff --git a/sbin/stop-mesos-dispatcher.sh b/sbin/stop-mesos-dispatcher.sh
index cb65d95b5e52..5c0b4e051db3 100755
--- a/sbin/stop-mesos-dispatcher.sh
+++ b/sbin/stop-mesos-dispatcher.sh
@@ -18,10 +18,11 @@
 #
 # Stop the Mesos Cluster dispatcher on the machine this script is executed on.
 
-sbin=`dirname "$0"`
-sbin=`cd "$sbin"; pwd`
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.deploy.mesos.MesosClusterDispatcher 1
+"${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.mesos.MesosClusterDispatcher 1
 
diff --git a/sbin/stop-mesos-shuffle-service.sh b/sbin/stop-mesos-shuffle-service.sh
index 0e965d5ec588..d23cad375e1b 100755
--- a/sbin/stop-mesos-shuffle-service.sh
+++ b/sbin/stop-mesos-shuffle-service.sh
@@ -19,7 +19,8 @@
 
 # Stops the Mesos external shuffle service on the machine this script is executed on.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.deploy.mesos.MesosExternalShuffleService 1
+"${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.mesos.MesosExternalShuffleService 1
diff --git a/sbin/stop-shuffle-service.sh b/sbin/stop-shuffle-service.sh
index 4cb6891ae27f..50d69cf34e0a 100755
--- a/sbin/stop-shuffle-service.sh
+++ b/sbin/stop-shuffle-service.sh
@@ -19,7 +19,8 @@
 
 # Stops the external shuffle service on the machine this script is executed on.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.deploy.ExternalShuffleService 1
+"${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.ExternalShuffleService 1
diff --git a/sbin/stop-slave.sh b/sbin/stop-slave.sh
index 3d1da5b254f2..685bcf59b33a 100755
--- a/sbin/stop-slave.sh
+++ b/sbin/stop-slave.sh
@@ -21,23 +21,24 @@
 #
 # Environment variables
 #
-#   SPARK_WORKER_INSTANCES The number of worker instances that should be 
+#   SPARK_WORKER_INSTANCES The number of worker instances that should be
 #                          running on this slave.  Default is 1.
 
 # Usage: stop-slave.sh
 #   Stops all slaves on this worker machine
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 if [ "$SPARK_WORKER_INSTANCES" = "" ]; then
-  "$sbin"/spark-daemon.sh stop org.apache.spark.deploy.worker.Worker 1
+  "${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.worker.Worker 1
 else
   for ((i=0; i<$SPARK_WORKER_INSTANCES; i++)); do
-    "$sbin"/spark-daemon.sh stop org.apache.spark.deploy.worker.Worker $(( $i + 1 ))
+    "${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.deploy.worker.Worker $(( $i + 1 ))
   done
 fi
diff --git a/sbin/stop-slaves.sh b/sbin/stop-slaves.sh
index 54c9bd46803a..63956377629d 100755
--- a/sbin/stop-slaves.sh
+++ b/sbin/stop-slaves.sh
@@ -17,16 +17,17 @@
 # limitations under the License.
 #
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-. "$sbin/spark-config.sh"
+. "${SPARK_HOME}/sbin/spark-config.sh"
 
-. "$SPARK_PREFIX/bin/load-spark-env.sh"
+. "${SPARK_HOME}/bin/load-spark-env.sh"
 
 # do before the below calls as they exec
-if [ -e "$sbin"/../tachyon/bin/tachyon ]; then
-  "$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin"/../tachyon/bin/tachyon killAll tachyon.worker.Worker
+if [ -e "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon ]; then
+  "${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon killAll tachyon.worker.Worker
 fi
 
-"$sbin/slaves.sh" cd "$SPARK_HOME" \; "$sbin"/stop-slave.sh
+"${SPARK_HOME}/sbin/slaves.sh" cd "${SPARK_HOME}" \; "${SPARK_HOME}/sbin"/stop-slave.sh
diff --git a/sbin/stop-thriftserver.sh b/sbin/stop-thriftserver.sh
index 4031a00d4a68..cf45058f882a 100755
--- a/sbin/stop-thriftserver.sh
+++ b/sbin/stop-thriftserver.sh
@@ -19,7 +19,8 @@
 
 # Stops the thrift server on the machine this script is executed on.
 
-sbin="`dirname "$0"`"
-sbin="`cd "$sbin"; pwd`"
+if [ -z "${SPARK_HOME}" ]; then
+  export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
+fi
 
-"$sbin"/spark-daemon.sh stop org.apache.spark.sql.hive.thriftserver.HiveThriftServer2 1
+"${SPARK_HOME}/sbin"/spark-daemon.sh stop org.apache.spark.sql.hive.thriftserver.HiveThriftServer2 1

From c09e5139874fb3626e005c8240cca5308b902ef3 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Wed, 4 Nov 2015 10:51:40 +0000
Subject: [PATCH 482/896] [SPARK-11442] Reduce numSlices for local metrics test
 of SparkListenerSuite

In the thread, http://search-hadoop.com/m/q3RTtcQiFSlTxeP/test+failed+due+to+OOME&subj=test+failed+due+to+OOME, it was discussed that memory consumption for SparkListenerSuite should be brought down.

This is an attempt in that direction by reducing numSlices for local metrics test.

Author: tedyu <yuzhihong@gmail.com>

Closes #9384 from tedyu/master.
---
 .../org/apache/spark/scheduler/SparkListenerSuite.scala  | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
index a9652d7e7d0b..53102b9f1c93 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
@@ -212,14 +212,15 @@ class SparkListenerSuite extends SparkFunSuite with LocalSparkContext with Match
       i
     }
 
-    val d = sc.parallelize(0 to 1e4.toInt, 64).map(w)
+    val numSlices = 16
+    val d = sc.parallelize(0 to 1e3.toInt, numSlices).map(w)
     d.count()
     sc.listenerBus.waitUntilEmpty(WAIT_TIMEOUT_MILLIS)
     listener.stageInfos.size should be (1)
 
     val d2 = d.map { i => w(i) -> i * 2 }.setName("shuffle input 1")
     val d3 = d.map { i => w(i) -> (0 to (i % 5)) }.setName("shuffle input 2")
-    val d4 = d2.cogroup(d3, 64).map { case (k, (v1, v2)) =>
+    val d4 = d2.cogroup(d3, numSlices).map { case (k, (v1, v2)) =>
       w(k) -> (v1.size, v2.size)
     }
     d4.setName("A Cogroup")
@@ -258,8 +259,8 @@ class SparkListenerSuite extends SparkFunSuite with LocalSparkContext with Match
         if (stageInfo.rddInfos.exists(_.name == d4.name)) {
           taskMetrics.shuffleReadMetrics should be ('defined)
           val sm = taskMetrics.shuffleReadMetrics.get
-          sm.totalBlocksFetched should be (128)
-          sm.localBlocksFetched should be (128)
+          sm.totalBlocksFetched should be (2*numSlices)
+          sm.localBlocksFetched should be (2*numSlices)
           sm.remoteBlocksFetched should be (0)
           sm.remoteBytesRead should be (0L)
         }

From e328b69c31821e4b27673d7ef6182ab3b7a05ca8 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 4 Nov 2015 08:28:33 -0800
Subject: [PATCH 483/896] [SPARK-9492][ML][R] LogisticRegression in R should
 provide model statistics

Like ml ```LinearRegression```, ```LogisticRegression``` should provide a training summary including feature names and their coefficients.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9303 from yanboliang/spark-9492.
---
 R/pkg/inst/tests/test_mllib.R                   | 17 +++++++++++++++++
 .../ml/classification/LogisticRegression.scala  | 17 +++++++++++++----
 .../org/apache/spark/ml/r/SparkRWrappers.scala  |  7 ++++---
 project/MimaExcludes.scala                      |  4 +++-
 4 files changed, 37 insertions(+), 8 deletions(-)

diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 3331ce738358..032cfef061fd 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -67,3 +67,20 @@ test_that("summary coefficients match with native glm", {
     as.character(stats$features) ==
     c("(Intercept)", "Sepal_Length", "Species_versicolor", "Species_virginica")))
 })
+
+test_that("summary coefficients match with native glm of family 'binomial'", {
+  df <- createDataFrame(sqlContext, iris)
+  training <- filter(df, df$Species != "setosa")
+  stats <- summary(glm(Species ~ Sepal_Length + Sepal_Width, data = training,
+    family = "binomial"))
+  coefs <- as.vector(stats$coefficients)
+
+  rTraining <- iris[iris$Species %in% c("versicolor","virginica"),]
+  rCoefs <- as.vector(coef(glm(Species ~ Sepal.Length + Sepal.Width, data = rTraining,
+    family = binomial(link = "logit"))))
+
+  expect_true(all(abs(rCoefs - coefs) < 1e-4))
+  expect_true(all(
+    as.character(stats$features) ==
+    c("(Intercept)", "Sepal_Length", "Sepal_Width")))
+})
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index a1335e7a1bde..f5fca686df14 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -378,6 +378,7 @@ class LogisticRegression(override val uid: String)
       model.transform(dataset),
       $(probabilityCol),
       $(labelCol),
+      $(featuresCol),
       objectiveHistory)
     model.setSummary(logRegSummary)
   }
@@ -452,7 +453,8 @@ class LogisticRegressionModel private[ml] (
    */
   // TODO: decide on a good name before exposing to public API
   private[classification] def evaluate(dataset: DataFrame): LogisticRegressionSummary = {
-    new BinaryLogisticRegressionSummary(this.transform(dataset), $(probabilityCol), $(labelCol))
+    new BinaryLogisticRegressionSummary(
+      this.transform(dataset), $(probabilityCol), $(labelCol), $(featuresCol))
   }
 
   /**
@@ -614,9 +616,12 @@ sealed trait LogisticRegressionSummary extends Serializable {
   /** Field in "predictions" which gives the calibrated probability of each instance as a vector. */
   def probabilityCol: String
 
-  /** Field in "predictions" which gives the the true label of each instance. */
+  /** Field in "predictions" which gives the true label of each instance. */
   def labelCol: String
 
+  /** Field in "predictions" which gives the features of each instance as a vector. */
+  def featuresCol: String
+
 }
 
 /**
@@ -626,6 +631,7 @@ sealed trait LogisticRegressionSummary extends Serializable {
  * @param probabilityCol field in "predictions" which gives the calibrated probability of
  *                       each instance as a vector.
  * @param labelCol field in "predictions" which gives the true label of each instance.
+ * @param featuresCol field in "predictions" which gives the features of each instance as a vector.
  * @param objectiveHistory objective function (scaled loss + regularization) at each iteration.
  */
 @Experimental
@@ -633,8 +639,9 @@ class BinaryLogisticRegressionTrainingSummary private[classification] (
     predictions: DataFrame,
     probabilityCol: String,
     labelCol: String,
+    featuresCol: String,
     val objectiveHistory: Array[Double])
-  extends BinaryLogisticRegressionSummary(predictions, probabilityCol, labelCol)
+  extends BinaryLogisticRegressionSummary(predictions, probabilityCol, labelCol, featuresCol)
   with LogisticRegressionTrainingSummary {
 
 }
@@ -646,12 +653,14 @@ class BinaryLogisticRegressionTrainingSummary private[classification] (
  * @param probabilityCol field in "predictions" which gives the calibrated probability of
  *                       each instance.
  * @param labelCol field in "predictions" which gives the true label of each instance.
+ * @param featuresCol field in "predictions" which gives the features of each instance as a vector.
  */
 @Experimental
 class BinaryLogisticRegressionSummary private[classification] (
     @transient override val predictions: DataFrame,
     override val probabilityCol: String,
-    override val labelCol: String) extends LogisticRegressionSummary {
+    override val labelCol: String,
+    override val featuresCol: String) extends LogisticRegressionSummary {
 
   private val sqlContext = predictions.sqlContext
   import sqlContext.implicits._
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index 24f76de806d8..5be2f8693621 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -66,9 +66,10 @@ private[r] object SparkRWrappers {
         val attrs = AttributeGroup.fromStructField(
           m.summary.predictions.schema(m.summary.featuresCol))
         Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
-      case _: LogisticRegressionModel =>
-        throw new UnsupportedOperationException(
-          "No features names available for LogisticRegressionModel")  // SPARK-9492
+      case m: LogisticRegressionModel =>
+        val attrs = AttributeGroup.fromStructField(
+          m.summary.predictions.schema(m.summary.featuresCol))
+        Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
     }
   }
 }
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index ec0e44b7f2d6..eeef96c378bd 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -59,7 +59,9 @@ object MimaExcludes {
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.ml.classification.LogisticAggregator.add"),
         ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.ml.classification.LogisticAggregator.count")
+          "org.apache.spark.ml.classification.LogisticAggregator.count"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.ml.classification.LogisticRegressionSummary.featuresCol")
       ) ++ Seq(
         // SPARK-10381 Fix types / units in private AskPermissionToCommitOutput RPC message.
         // This class is marked as `private` but MiMa still seems to be confused by the change.

From 820064e613609bbf7edd726d982da1de60bf417a Mon Sep 17 00:00:00 2001
From: Pravin Gadakh <pravingadakh177@gmail.com>
Date: Wed, 4 Nov 2015 08:32:08 -0800
Subject: [PATCH 484/896] [SPARK-11380][DOCS] Replace example code in
 mllib-frequent-pattern-mining.md using include_example

Author: Pravin Gadakh <pravingadakh177@gmail.com>
Author: Pravin Gadakh <prgadakh@in.ibm.com>

Closes #9340 from pravingadakh/SPARK-11380.
---
 docs/mllib-frequent-pattern-mining.md         | 168 +-----------------
 .../mllib/JavaAssociationRulesExample.java    |  56 ++++++
 .../examples/mllib/JavaPrefixSpanExample.java |  55 ++++++
 .../examples/mllib/JavaSimpleFPGrowth.java    |  71 ++++++++
 .../src/main/python/mllib/fpgrowth_example.py |  33 ++++
 .../mllib/AssociationRulesExample.scala       |  54 ++++++
 .../examples/mllib/PrefixSpanExample.scala    |  52 ++++++
 .../spark/examples/mllib/SimpleFPGrowth.scala |  59 ++++++
 8 files changed, 387 insertions(+), 161 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaAssociationRulesExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaPrefixSpanExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaSimpleFPGrowth.java
 create mode 100644 examples/src/main/python/mllib/fpgrowth_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/AssociationRulesExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/PrefixSpanExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/SimpleFPGrowth.scala

diff --git a/docs/mllib-frequent-pattern-mining.md b/docs/mllib-frequent-pattern-mining.md
index f749eb4f2ff4..fe42896a05d8 100644
--- a/docs/mllib-frequent-pattern-mining.md
+++ b/docs/mllib-frequent-pattern-mining.md
@@ -52,31 +52,7 @@ details) from `transactions`.
 
 Refer to the [`FPGrowth` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.FPGrowth) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.rdd.RDD
-import org.apache.spark.mllib.fpm.FPGrowth
-
-val data = sc.textFile("data/mllib/sample_fpgrowth.txt")
-
-val transactions: RDD[Array[String]] = data.map(s => s.trim.split(' '))
-
-val fpg = new FPGrowth()
-  .setMinSupport(0.2)
-  .setNumPartitions(10)
-val model = fpg.run(transactions)
-
-model.freqItemsets.collect().foreach { itemset =>
-  println(itemset.items.mkString("[", ",", "]") + ", " + itemset.freq)
-}
-
-val minConfidence = 0.8
-model.generateAssociationRules(minConfidence).collect().foreach { rule =>
-  println(
-    rule.antecedent.mkString("[", ",", "]")
-      + " => " + rule.consequent .mkString("[", ",", "]")
-      + ", " + rule.confidence)
-}
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/SimpleFPGrowth.scala %}
 
 </div>
 
@@ -95,46 +71,7 @@ details) from `transactions`.
 
 Refer to the [`FPGrowth` Java docs](api/java/org/apache/spark/mllib/fpm/FPGrowth.html) for details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-import java.util.List;
-
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.mllib.fpm.AssociationRules;
-import org.apache.spark.mllib.fpm.FPGrowth;
-import org.apache.spark.mllib.fpm.FPGrowthModel;
-
-SparkConf conf = new SparkConf().setAppName("FP-growth Example");
-JavaSparkContext sc = new JavaSparkContext(conf);
-
-JavaRDD<String> data = sc.textFile("data/mllib/sample_fpgrowth.txt");
-
-JavaRDD<List<String>> transactions = data.map(
-  new Function<String, List<String>>() {
-    public List<String> call(String line) {
-      String[] parts = line.split(" ");
-      return Arrays.asList(parts);
-    }
-  }
-);
-
-FPGrowth fpg = new FPGrowth()
-  .setMinSupport(0.2)
-  .setNumPartitions(10);
-FPGrowthModel<String> model = fpg.run(transactions);
-
-for (FPGrowth.FreqItemset<String> itemset: model.freqItemsets().toJavaRDD().collect()) {
-  System.out.println("[" + itemset.javaItems() + "], " + itemset.freq());
-}
-
-double minConfidence = 0.8;
-for (AssociationRules.Rule<String> rule
-    : model.generateAssociationRules(minConfidence).toJavaRDD().collect()) {
-  System.out.println(
-    rule.javaAntecedent() + " => " + rule.javaConsequent() + ", " + rule.confidence());
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaSimpleFPGrowth.java %}
 
 </div>
 
@@ -149,19 +86,7 @@ that stores the frequent itemsets with their frequencies.
 
 Refer to the [`FPGrowth` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.fpm.FPGrowth) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.fpm import FPGrowth
-
-data = sc.textFile("data/mllib/sample_fpgrowth.txt")
-
-transactions = data.map(lambda line: line.strip().split(' '))
-
-model = FPGrowth.train(transactions, minSupport=0.2, numPartitions=10)
-
-result = model.freqItemsets().collect()
-for fi in result:
-    print(fi)
-{% endhighlight %}
+{% include_example python/mllib/fpgrowth_example.py %}
 
 </div>
 
@@ -177,27 +102,7 @@ that have a single item as the consequent.
 
 Refer to the [`AssociationRules` Scala docs](api/java/org/apache/spark/mllib/fpm/AssociationRules.html) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.rdd.RDD
-import org.apache.spark.mllib.fpm.AssociationRules
-import org.apache.spark.mllib.fpm.FPGrowth.FreqItemset
-
-val freqItemsets = sc.parallelize(Seq(
-  new FreqItemset(Array("a"), 15L),
-  new FreqItemset(Array("b"), 35L),
-  new FreqItemset(Array("a", "b"), 12L)
-));
-
-val ar = new AssociationRules()
-  .setMinConfidence(0.8)
-val results = ar.run(freqItemsets)
-
-results.collect().foreach { rule =>
-  println("[" + rule.antecedent.mkString(",")
-    + "=>"
-    + rule.consequent.mkString(",") + "]," + rule.confidence)
-}
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/AssociationRulesExample.scala %}
 
 </div>
 
@@ -208,29 +113,7 @@ that have a single item as the consequent.
 
 Refer to the [`AssociationRules` Java docs](api/java/org/apache/spark/mllib/fpm/AssociationRules.html) for details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.mllib.fpm.AssociationRules;
-import org.apache.spark.mllib.fpm.FPGrowth.FreqItemset;
-
-JavaRDD<FPGrowth.FreqItemset<String>> freqItemsets = sc.parallelize(Arrays.asList(
-  new FreqItemset<String>(new String[] {"a"}, 15L),
-  new FreqItemset<String>(new String[] {"b"}, 35L),
-  new FreqItemset<String>(new String[] {"a", "b"}, 12L)
-));
-
-AssociationRules arules = new AssociationRules()
-  .setMinConfidence(0.8);
-JavaRDD<AssociationRules.Rule<String>> results = arules.run(freqItemsets);
-
-for (AssociationRules.Rule<String> rule: results.collect()) {
-  System.out.println(
-    rule.javaAntecedent() + " => " + rule.javaConsequent() + ", " + rule.confidence());
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaAssociationRulesExample.java %}
 
 </div>
 </div>
@@ -278,24 +161,7 @@ that stores the frequent sequences with their frequencies.
 
 Refer to the [`PrefixSpan` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.PrefixSpan) and [`PrefixSpanModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.fpm.PrefixSpanModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.fpm.PrefixSpan
-
-val sequences = sc.parallelize(Seq(
-    Array(Array(1, 2), Array(3)),
-    Array(Array(1), Array(3, 2), Array(1, 2)),
-    Array(Array(1, 2), Array(5)),
-    Array(Array(6))
-  ), 2).cache()
-val prefixSpan = new PrefixSpan()
-  .setMinSupport(0.5)
-  .setMaxPatternLength(5)
-val model = prefixSpan.run(sequences)
-model.freqSequences.collect().foreach { freqSequence =>
-println(
-  freqSequence.sequence.map(_.mkString("[", ", ", "]")).mkString("[", ", ", "]") + ", " + freqSequence.freq)
-}
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/PrefixSpanExample.scala %}
 
 </div>
 
@@ -309,27 +175,7 @@ that stores the frequent sequences with their frequencies.
 
 Refer to the [`PrefixSpan` Java docs](api/java/org/apache/spark/mllib/fpm/PrefixSpan.html) and [`PrefixSpanModel` Java docs](api/java/org/apache/spark/mllib/fpm/PrefixSpanModel.html) for details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-import java.util.List;
-
-import org.apache.spark.mllib.fpm.PrefixSpan;
-import org.apache.spark.mllib.fpm.PrefixSpanModel;
-
-JavaRDD<List<List<Integer>>> sequences = sc.parallelize(Arrays.asList(
-  Arrays.asList(Arrays.asList(1, 2), Arrays.asList(3)),
-  Arrays.asList(Arrays.asList(1), Arrays.asList(3, 2), Arrays.asList(1, 2)),
-  Arrays.asList(Arrays.asList(1, 2), Arrays.asList(5)),
-  Arrays.asList(Arrays.asList(6))
-), 2);
-PrefixSpan prefixSpan = new PrefixSpan()
-  .setMinSupport(0.5)
-  .setMaxPatternLength(5);
-PrefixSpanModel<Integer> model = prefixSpan.run(sequences);
-for (PrefixSpan.FreqSequence<Integer> freqSeq: model.freqSequences().toJavaRDD().collect()) {
-  System.out.println(freqSeq.javaSequence() + ", " + freqSeq.freq());
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaPrefixSpanExample.java %}
 
 </div>
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaAssociationRulesExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaAssociationRulesExample.java
new file mode 100644
index 000000000000..4d0f989819ac
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaAssociationRulesExample.java
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.Arrays;
+
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.mllib.fpm.AssociationRules;
+import org.apache.spark.mllib.fpm.FPGrowth;
+import org.apache.spark.mllib.fpm.FPGrowth.FreqItemset;
+// $example off$
+
+import org.apache.spark.SparkConf;
+
+public class JavaAssociationRulesExample {
+
+  public static void main(String[] args) {
+
+    SparkConf sparkConf = new SparkConf().setAppName("JavaAssociationRulesExample");
+    JavaSparkContext sc = new JavaSparkContext(sparkConf);
+
+    // $example on$
+    JavaRDD<FPGrowth.FreqItemset<String>> freqItemsets = sc.parallelize(Arrays.asList(
+      new FreqItemset<String>(new String[] {"a"}, 15L),
+      new FreqItemset<String>(new String[] {"b"}, 35L),
+      new FreqItemset<String>(new String[] {"a", "b"}, 12L)
+    ));
+
+    AssociationRules arules = new AssociationRules()
+      .setMinConfidence(0.8);
+    JavaRDD<AssociationRules.Rule<String>> results = arules.run(freqItemsets);
+
+    for (AssociationRules.Rule<String> rule : results.collect()) {
+      System.out.println(
+        rule.javaAntecedent() + " => " + rule.javaConsequent() + ", " + rule.confidence());
+    }
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaPrefixSpanExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaPrefixSpanExample.java
new file mode 100644
index 000000000000..68ec7c1e6ebe
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaPrefixSpanExample.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.Arrays;
+import java.util.List;
+// $example off$
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.mllib.fpm.PrefixSpan;
+import org.apache.spark.mllib.fpm.PrefixSpanModel;
+// $example off$
+import org.apache.spark.SparkConf;
+
+public class JavaPrefixSpanExample {
+
+  public static void main(String[] args) {
+
+    SparkConf sparkConf = new SparkConf().setAppName("JavaPrefixSpanExample");
+    JavaSparkContext sc = new JavaSparkContext(sparkConf);
+
+    // $example on$
+    JavaRDD<List<List<Integer>>> sequences = sc.parallelize(Arrays.asList(
+      Arrays.asList(Arrays.asList(1, 2), Arrays.asList(3)),
+      Arrays.asList(Arrays.asList(1), Arrays.asList(3, 2), Arrays.asList(1, 2)),
+      Arrays.asList(Arrays.asList(1, 2), Arrays.asList(5)),
+      Arrays.asList(Arrays.asList(6))
+    ), 2);
+    PrefixSpan prefixSpan = new PrefixSpan()
+      .setMinSupport(0.5)
+      .setMaxPatternLength(5);
+    PrefixSpanModel<Integer> model = prefixSpan.run(sequences);
+    for (PrefixSpan.FreqSequence<Integer> freqSeq: model.freqSequences().toJavaRDD().collect()) {
+      System.out.println(freqSeq.javaSequence() + ", " + freqSeq.freq());
+    }
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaSimpleFPGrowth.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaSimpleFPGrowth.java
new file mode 100644
index 000000000000..72edaca5e95b
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaSimpleFPGrowth.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example off$
+import org.apache.spark.api.java.function.Function;
+// $example on$
+import org.apache.spark.mllib.fpm.AssociationRules;
+import org.apache.spark.mllib.fpm.FPGrowth;
+import org.apache.spark.mllib.fpm.FPGrowthModel;
+// $example off$
+
+import org.apache.spark.SparkConf;
+
+public class JavaSimpleFPGrowth {
+
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("FP-growth Example");
+    JavaSparkContext sc = new JavaSparkContext(conf);
+
+    // $example on$
+    JavaRDD<String> data = sc.textFile("data/mllib/sample_fpgrowth.txt");
+
+    JavaRDD<List<String>> transactions = data.map(
+      new Function<String, List<String>>() {
+        public List<String> call(String line) {
+          String[] parts = line.split(" ");
+          return Arrays.asList(parts);
+        }
+      }
+    );
+
+    FPGrowth fpg = new FPGrowth()
+      .setMinSupport(0.2)
+      .setNumPartitions(10);
+    FPGrowthModel<String> model = fpg.run(transactions);
+
+    for (FPGrowth.FreqItemset<String> itemset: model.freqItemsets().toJavaRDD().collect()) {
+      System.out.println("[" + itemset.javaItems() + "], " + itemset.freq());
+    }
+
+    double minConfidence = 0.8;
+    for (AssociationRules.Rule<String> rule
+      : model.generateAssociationRules(minConfidence).toJavaRDD().collect()) {
+      System.out.println(
+        rule.javaAntecedent() + " => " + rule.javaConsequent() + ", " + rule.confidence());
+    }
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/fpgrowth_example.py b/examples/src/main/python/mllib/fpgrowth_example.py
new file mode 100644
index 000000000000..715f5268206c
--- /dev/null
+++ b/examples/src/main/python/mllib/fpgrowth_example.py
@@ -0,0 +1,33 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# $example on$
+from pyspark.mllib.fpm import FPGrowth
+# $example off$
+from pyspark import SparkContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="FPGrowth")
+
+    # $example on$
+    data = sc.textFile("data/mllib/sample_fpgrowth.txt")
+    transactions = data.map(lambda line: line.strip().split(' '))
+    model = FPGrowth.train(transactions, minSupport=0.2, numPartitions=10)
+    result = model.freqItemsets().collect()
+    for fi in result:
+        print(fi)
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/AssociationRulesExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/AssociationRulesExample.scala
new file mode 100644
index 000000000000..ca22ddafc3c4
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/AssociationRulesExample.scala
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.fpm.AssociationRules
+import org.apache.spark.mllib.fpm.FPGrowth.FreqItemset
+// $example off$
+
+import org.apache.spark.{SparkConf, SparkContext}
+
+object AssociationRulesExample {
+
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("AssociationRulesExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    val freqItemsets = sc.parallelize(Seq(
+      new FreqItemset(Array("a"), 15L),
+      new FreqItemset(Array("b"), 35L),
+      new FreqItemset(Array("a", "b"), 12L)
+    ))
+
+    val ar = new AssociationRules()
+      .setMinConfidence(0.8)
+    val results = ar.run(freqItemsets)
+
+    results.collect().foreach { rule =>
+      println("[" + rule.antecedent.mkString(",")
+        + "=>"
+        + rule.consequent.mkString(",") + "]," + rule.confidence)
+    }
+    // $example off$
+  }
+
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/PrefixSpanExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/PrefixSpanExample.scala
new file mode 100644
index 000000000000..d237232c430c
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/PrefixSpanExample.scala
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.fpm.PrefixSpan
+// $example off$
+
+import org.apache.spark.{SparkConf, SparkContext}
+
+object PrefixSpanExample {
+
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("PrefixSpanExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    val sequences = sc.parallelize(Seq(
+      Array(Array(1, 2), Array(3)),
+      Array(Array(1), Array(3, 2), Array(1, 2)),
+      Array(Array(1, 2), Array(5)),
+      Array(Array(6))
+    ), 2).cache()
+    val prefixSpan = new PrefixSpan()
+      .setMinSupport(0.5)
+      .setMaxPatternLength(5)
+    val model = prefixSpan.run(sequences)
+    model.freqSequences.collect().foreach { freqSequence =>
+      println(
+        freqSequence.sequence.map(_.mkString("[", ", ", "]")).mkString("[", ", ", "]") +
+          ", " + freqSequence.freq)
+    }
+    // $example off$
+  }
+}
+// scalastyle:off println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/SimpleFPGrowth.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/SimpleFPGrowth.scala
new file mode 100644
index 000000000000..b4e06afa7410
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/SimpleFPGrowth.scala
@@ -0,0 +1,59 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.fpm.FPGrowth
+import org.apache.spark.rdd.RDD
+// $example off$
+
+import org.apache.spark.{SparkContext, SparkConf}
+
+object SimpleFPGrowth {
+
+  def main(args: Array[String]) {
+
+    val conf = new SparkConf().setAppName("SimpleFPGrowth")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    val data = sc.textFile("data/mllib/sample_fpgrowth.txt")
+
+    val transactions: RDD[Array[String]] = data.map(s => s.trim.split(' '))
+
+    val fpg = new FPGrowth()
+      .setMinSupport(0.2)
+      .setNumPartitions(10)
+    val model = fpg.run(transactions)
+
+    model.freqItemsets.collect().foreach { itemset =>
+      println(itemset.items.mkString("[", ",", "]") + ", " + itemset.freq)
+    }
+
+    val minConfidence = 0.8
+    model.generateAssociationRules(minConfidence).collect().foreach { rule =>
+      println(
+        rule.antecedent.mkString("[", ",", "]")
+          + " => " + rule.consequent .mkString("[", ",", "]")
+          + ", " + rule.confidence)
+    }
+    // $example off$
+  }
+}
+// scalastyle:on println

From 9b214cea896056e7d0a69ae9d3c282e1f027d5b9 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Wed, 4 Nov 2015 08:36:55 -0800
Subject: [PATCH 485/896] [SPARK-11443] Reserve space lines

The trim_codeblock(lines) function in include_example.rb removes some blank lines in the code.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9400 from yinxusen/SPARK-11443.
---
 docs/_plugins/include_example.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/_plugins/include_example.rb b/docs/_plugins/include_example.rb
index 0f4184c7462b..6ee63a5ac69d 100644
--- a/docs/_plugins/include_example.rb
+++ b/docs/_plugins/include_example.rb
@@ -50,7 +50,7 @@ def trim_codeblock(lines)
         .map { |l| l[/\A */].size }
         .min
 
-      lines.map { |l| l[min_start_spaces .. -1] }
+      lines.map { |l| l.strip.size == 0 ? l : l[min_start_spaces .. -1] }
     end
 
     # Select lines according to labels in code. Currently we use "$example on$" and "$example off$"

From 8790ee6d69e50ca84eb849742be48f2476743b5b Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 4 Nov 2015 09:07:22 -0800
Subject: [PATCH 486/896] [SPARK-10622][CORE][YARN] Differentiate dead from
 "mostly dead" executors.

In YARN mode, when preemption is enabled, we may leave executors in a
zombie state while we wait to retrieve the reason for which the executor
exited. This is so that we don't account for failed tasks that were
running on a preempted executor.

The issue is that while we wait for this information, the scheduler
might decide to schedule tasks on the executor, which will never be
able to run them. Other side effects include the block manager still
considering the executor available to cache blocks, for example.

So, when we know that an executor went down but we don't know why,
stop everything related to the executor, except its running tasks.
Only when we know the reason for the exit (or give up waiting for
it) we do update the running tasks.

This is achieved by a new `disableExecutor()` method in the
`Schedulable` interface. For managers that do not behave like this
(i.e. every one but YARN), the existing `executorLost()` method
will behave the same way it did before.

On top of that change, a few minor changes that made debugging easier,
and fixed some other minor issues:
- The cluster-mode AM was printing a misleading log message every
  time an executor disconnected from the driver (because the akka
  actor system was shared between driver and AM).
- Avoid sending unnecessary requests for an executor's exit reason
  when we already know it was explicitly disabled / killed. This
  avoids both multiple requests, and unnecessary requests that would
  just cause warning messages on the AM (in the explicit kill case).
- Tone down a log message about the executor being lost when it
  exited normally (e.g. preemption)
- Wake up the AM monitor thread when requests for executor loss
  reasons arrive too, so that we can more quickly remove executors
  from this zombie state.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #8887 from vanzin/SPARK-10622.
---
 .../spark/scheduler/ExecutorLossReason.scala  |  9 +++
 .../spark/scheduler/TaskSchedulerImpl.scala   | 32 ++++++--
 .../CoarseGrainedSchedulerBackend.scala       | 37 ++++++++-
 .../cluster/YarnSchedulerBackend.scala        |  9 +--
 .../scheduler/TaskSchedulerImplSuite.scala    | 36 +++++++++
 .../spark/deploy/yarn/ApplicationMaster.scala | 79 +++++++++++--------
 .../spark/deploy/yarn/YarnAllocator.scala     |  5 ++
 7 files changed, 157 insertions(+), 50 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
index 33edf2504385..47a5cbff4930 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
@@ -40,6 +40,15 @@ private[spark] object ExecutorExited {
   }
 }
 
+/**
+ * A loss reason that means we don't yet know why the executor exited.
+ *
+ * This is used by the task scheduler to remove state associated with the executor, but
+ * not yet fail any tasks that were running in the executor before the real loss reason
+ * is known.
+ */
+private [spark] object LossReasonPending extends ExecutorLossReason("Pending loss reason.")
+
 private[spark]
 case class SlaveLost(_message: String = "Slave lost")
   extends ExecutorLossReason(_message)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
index 1c7bfe89c02a..43d7d80b7aae 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
@@ -468,11 +468,20 @@ private[spark] class TaskSchedulerImpl(
         removeExecutor(executorId, reason)
         failedExecutor = Some(executorId)
       } else {
-         // We may get multiple executorLost() calls with different loss reasons. For example, one
-         // may be triggered by a dropped connection from the slave while another may be a report
-         // of executor termination from Mesos. We produce log messages for both so we eventually
-         // report the termination reason.
-         logError("Lost an executor " + executorId + " (already removed): " + reason)
+         executorIdToHost.get(executorId) match {
+           case Some(_) =>
+             // If the host mapping still exists, it means we don't know the loss reason for the
+             // executor. So call removeExecutor() to update tasks running on that executor when
+             // the real loss reason is finally known.
+             removeExecutor(executorId, reason)
+
+           case None =>
+             // We may get multiple executorLost() calls with different loss reasons. For example,
+             // one may be triggered by a dropped connection from the slave while another may be a
+             // report of executor termination from Mesos. We produce log messages for both so we
+             // eventually report the termination reason.
+             logError("Lost an executor " + executorId + " (already removed): " + reason)
+         }
       }
     }
     // Call dagScheduler.executorLost without holding the lock on this to prevent deadlock
@@ -482,7 +491,11 @@ private[spark] class TaskSchedulerImpl(
     }
   }
 
-  /** Remove an executor from all our data structures and mark it as lost */
+  /**
+   * Remove an executor from all our data structures and mark it as lost. If the executor's loss
+   * reason is not yet known, do not yet remove its association with its host nor update the status
+   * of any running tasks, since the loss reason defines whether we'll fail those tasks.
+   */
   private def removeExecutor(executorId: String, reason: ExecutorLossReason) {
     activeExecutorIds -= executorId
     val host = executorIdToHost(executorId)
@@ -497,8 +510,11 @@ private[spark] class TaskSchedulerImpl(
         }
       }
     }
-    executorIdToHost -= executorId
-    rootPool.executorLost(executorId, host, reason)
+
+    if (reason != LossReasonPending) {
+      executorIdToHost -= executorId
+      rootPool.executorLost(executorId, host, reason)
+    }
   }
 
   def executorAdded(execId: String, host: String) {
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index ebce5021b19d..f71d98feac05 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -73,6 +73,9 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
   // The number of pending tasks which is locality required
   protected var localityAwareTasks = 0
 
+  // Executors that have been lost, but for which we don't yet know the real exit reason.
+  protected val executorsPendingLossReason = new HashSet[String]
+
   class DriverEndpoint(override val rpcEnv: RpcEnv, sparkProperties: Seq[(String, String)])
     extends ThreadSafeRpcEndpoint with Logging {
 
@@ -184,7 +187,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     // Make fake resource offers on all executors
     private def makeOffers() {
       // Filter out executors under killing
-      val activeExecutors = executorDataMap.filterKeys(!executorsPendingToRemove.contains(_))
+      val activeExecutors = executorDataMap.filterKeys(executorIsAlive)
       val workOffers = activeExecutors.map { case (id, executorData) =>
         new WorkerOffer(id, executorData.executorHost, executorData.freeCores)
       }.toSeq
@@ -202,7 +205,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     // Make fake resource offers on just one executor
     private def makeOffers(executorId: String) {
       // Filter out executors under killing
-      if (!executorsPendingToRemove.contains(executorId)) {
+      if (executorIsAlive(executorId)) {
         val executorData = executorDataMap(executorId)
         val workOffers = Seq(
           new WorkerOffer(executorId, executorData.executorHost, executorData.freeCores))
@@ -210,6 +213,11 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
       }
     }
 
+    private def executorIsAlive(executorId: String): Boolean = synchronized {
+      !executorsPendingToRemove.contains(executorId) &&
+        !executorsPendingLossReason.contains(executorId)
+    }
+
     // Launch tasks returned by a set of resource offers
     private def launchTasks(tasks: Seq[Seq[TaskDescription]]) {
       for (task <- tasks.flatten) {
@@ -246,6 +254,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
             addressToExecutorId -= executorInfo.executorAddress
             executorDataMap -= executorId
             executorsPendingToRemove -= executorId
+            executorsPendingLossReason -= executorId
           }
           totalCoreCount.addAndGet(-executorInfo.totalCores)
           totalRegisteredExecutors.addAndGet(-1)
@@ -256,6 +265,30 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
       }
     }
 
+    /**
+     * Stop making resource offers for the given executor. The executor is marked as lost with
+     * the loss reason still pending.
+     *
+     * @return Whether executor was alive.
+     */
+    protected def disableExecutor(executorId: String): Boolean = {
+      val shouldDisable = CoarseGrainedSchedulerBackend.this.synchronized {
+        if (executorIsAlive(executorId)) {
+          executorsPendingLossReason += executorId
+          true
+        } else {
+          false
+        }
+      }
+
+      if (shouldDisable) {
+        logInfo(s"Disabling executor $executorId.")
+        scheduler.executorLost(executorId, LossReasonPending)
+      }
+
+      shouldDisable
+    }
+
     override def onStop() {
       reviveThread.shutdownNow()
     }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
index d75d6f673e84..80da37b09b59 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/YarnSchedulerBackend.scala
@@ -115,15 +115,12 @@ private[spark] abstract class YarnSchedulerBackend(
      * (e.g., preemption), according to the application master, then we pass that information down
      * to the TaskSetManager to inform the TaskSetManager that tasks on that lost executor should
      * not count towards a job failure.
-     *
-     * TODO there's a race condition where while we are querying the ApplicationMaster for
-     * the executor loss reason, there is the potential that tasks will be scheduled on
-     * the executor that failed. We should fix this by having this onDisconnected event
-     * also "blacklist" executors so that tasks are not assigned to them.
      */
     override def onDisconnected(rpcAddress: RpcAddress): Unit = {
       addressToExecutorId.get(rpcAddress).foreach { executorId =>
-        yarnSchedulerEndpoint.handleExecutorDisconnectedFromDriver(executorId, rpcAddress)
+        if (disableExecutor(executorId)) {
+          yarnSchedulerEndpoint.handleExecutorDisconnectedFromDriver(executorId, rpcAddress)
+        }
       }
     }
   }
diff --git a/core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala
index c2edd4c317d6..2afb595e6f10 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala
@@ -237,4 +237,40 @@ class TaskSchedulerImplSuite extends SparkFunSuite with LocalSparkContext with L
     }
   }
 
+  test("tasks are not re-scheduled while executor loss reason is pending") {
+    sc = new SparkContext("local", "TaskSchedulerImplSuite")
+    val taskScheduler = new TaskSchedulerImpl(sc)
+    taskScheduler.initialize(new FakeSchedulerBackend)
+    // Need to initialize a DAGScheduler for the taskScheduler to use for callbacks.
+    new DAGScheduler(sc, taskScheduler) {
+      override def taskStarted(task: Task[_], taskInfo: TaskInfo) {}
+      override def executorAdded(execId: String, host: String) {}
+    }
+
+    val e0Offers = Seq(new WorkerOffer("executor0", "host0", 1))
+    val e1Offers = Seq(new WorkerOffer("executor1", "host0", 1))
+    val attempt1 = FakeTask.createTaskSet(1)
+
+    // submit attempt 1, offer resources, task gets scheduled
+    taskScheduler.submitTasks(attempt1)
+    val taskDescriptions = taskScheduler.resourceOffers(e0Offers).flatten
+    assert(1 === taskDescriptions.length)
+
+    // mark executor0 as dead but pending fail reason
+    taskScheduler.executorLost("executor0", LossReasonPending)
+
+    // offer some more resources on a different executor, nothing should change
+    val taskDescriptions2 = taskScheduler.resourceOffers(e1Offers).flatten
+    assert(0 === taskDescriptions2.length)
+
+    // provide the actual loss reason for executor0
+    taskScheduler.executorLost("executor0", SlaveLost("oops"))
+
+    // executor0's tasks should have failed now that the loss reason is known, so offering more
+    // resources should make them be scheduled on the new executor.
+    val taskDescriptions3 = taskScheduler.resourceOffers(e1Offers).flatten
+    assert(1 === taskDescriptions3.length)
+    assert("executor1" === taskDescriptions3(0).executorId)
+  }
+
 }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 12ae350e4cef..50ae7ffeec4c 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -87,8 +87,27 @@ private[spark] class ApplicationMaster(
 
   @volatile private var reporterThread: Thread = _
   @volatile private var allocator: YarnAllocator = _
+
+  // Lock for controlling the allocator (heartbeat) thread.
   private val allocatorLock = new Object()
 
+  // Steady state heartbeat interval. We want to be reasonably responsive without causing too many
+  // requests to RM.
+  private val heartbeatInterval = {
+    // Ensure that progress is sent before YarnConfiguration.RM_AM_EXPIRY_INTERVAL_MS elapses.
+    val expiryInterval = yarnConf.getInt(YarnConfiguration.RM_AM_EXPIRY_INTERVAL_MS, 120000)
+    math.max(0, math.min(expiryInterval / 2,
+      sparkConf.getTimeAsMs("spark.yarn.scheduler.heartbeat.interval-ms", "3s")))
+  }
+
+  // Initial wait interval before allocator poll, to allow for quicker ramp up when executors are
+  // being requested.
+  private val initialAllocationInterval = math.min(heartbeatInterval,
+    sparkConf.getTimeAsMs("spark.yarn.scheduler.initial-allocation.interval", "200ms"))
+
+  // Next wait interval before allocator poll.
+  private var nextAllocationInterval = initialAllocationInterval
+
   // Fields used in client mode.
   private var rpcEnv: RpcEnv = null
   private var amEndpoint: RpcEndpointRef = _
@@ -332,19 +351,6 @@ private[spark] class ApplicationMaster(
   }
 
   private def launchReporterThread(): Thread = {
-    // Ensure that progress is sent before YarnConfiguration.RM_AM_EXPIRY_INTERVAL_MS elapses.
-    val expiryInterval = yarnConf.getInt(YarnConfiguration.RM_AM_EXPIRY_INTERVAL_MS, 120000)
-
-    // we want to be reasonably responsive without causing too many requests to RM.
-    val heartbeatInterval = math.max(0, math.min(expiryInterval / 2,
-      sparkConf.getTimeAsMs("spark.yarn.scheduler.heartbeat.interval-ms", "3s")))
-
-    // we want to check more frequently for pending containers
-    val initialAllocationInterval = math.min(heartbeatInterval,
-      sparkConf.getTimeAsMs("spark.yarn.scheduler.initial-allocation.interval", "200ms"))
-
-    var nextAllocationInterval = initialAllocationInterval
-
     // The number of failures in a row until Reporter thread give up
     val reporterMaxFailures = sparkConf.getInt("spark.yarn.scheduler.reporterThread.maxFailures", 5)
 
@@ -377,19 +383,19 @@ private[spark] class ApplicationMaster(
           }
           try {
             val numPendingAllocate = allocator.getPendingAllocate.size
-            val sleepInterval =
-              if (numPendingAllocate > 0) {
-                val currentAllocationInterval =
-                  math.min(heartbeatInterval, nextAllocationInterval)
-                nextAllocationInterval = currentAllocationInterval * 2 // avoid overflow
-                currentAllocationInterval
-              } else {
-                nextAllocationInterval = initialAllocationInterval
-                heartbeatInterval
-              }
-            logDebug(s"Number of pending allocations is $numPendingAllocate. " +
-                     s"Sleeping for $sleepInterval.")
             allocatorLock.synchronized {
+              val sleepInterval =
+                if (numPendingAllocate > 0 || allocator.getNumPendingLossReasonRequests > 0) {
+                  val currentAllocationInterval =
+                    math.min(heartbeatInterval, nextAllocationInterval)
+                  nextAllocationInterval = currentAllocationInterval * 2 // avoid overflow
+                  currentAllocationInterval
+                } else {
+                  nextAllocationInterval = initialAllocationInterval
+                  heartbeatInterval
+                }
+              logDebug(s"Number of pending allocations is $numPendingAllocate. " +
+                       s"Sleeping for $sleepInterval.")
               allocatorLock.wait(sleepInterval)
             }
           } catch {
@@ -560,6 +566,11 @@ private[spark] class ApplicationMaster(
     userThread
   }
 
+  private def resetAllocatorInterval(): Unit = allocatorLock.synchronized {
+    nextAllocationInterval = initialAllocationInterval
+    allocatorLock.notifyAll()
+  }
+
   /**
    * An [[RpcEndpoint]] that communicates with the driver's scheduler backend.
    */
@@ -581,11 +592,9 @@ private[spark] class ApplicationMaster(
       case RequestExecutors(requestedTotal, localityAwareTasks, hostToLocalTaskCount) =>
         Option(allocator) match {
           case Some(a) =>
-            allocatorLock.synchronized {
-              if (a.requestTotalExecutorsWithPreferredLocalities(requestedTotal,
-                localityAwareTasks, hostToLocalTaskCount)) {
-                allocatorLock.notifyAll()
-              }
+            if (a.requestTotalExecutorsWithPreferredLocalities(requestedTotal,
+              localityAwareTasks, hostToLocalTaskCount)) {
+              resetAllocatorInterval()
             }
 
           case None =>
@@ -603,17 +612,19 @@ private[spark] class ApplicationMaster(
 
       case GetExecutorLossReason(eid) =>
         Option(allocator) match {
-          case Some(a) => a.enqueueGetLossReasonRequest(eid, context)
-          case None => logWarning(s"Container allocator is not ready to find" +
-            s" executor loss reasons yet.")
+          case Some(a) =>
+            a.enqueueGetLossReasonRequest(eid, context)
+            resetAllocatorInterval()
+          case None =>
+            logWarning("Container allocator is not ready to find executor loss reasons yet.")
         }
     }
 
     override def onDisconnected(remoteAddress: RpcAddress): Unit = {
-      logInfo(s"Driver terminated or disconnected! Shutting down. $remoteAddress")
       // In cluster mode, do not rely on the disassociated event to exit
       // This avoids potentially reporting incorrect exit codes if the driver fails
       if (!isClusterMode) {
+        logInfo(s"Driver terminated or disconnected! Shutting down. $remoteAddress")
         finish(FinalApplicationStatus.SUCCEEDED, ApplicationMaster.EXIT_SUCCESS)
       }
     }
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index a0cf1b4aa469..4d9e777cb413 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -550,6 +550,10 @@ private[yarn] class YarnAllocator(
 
   private[yarn] def getNumUnexpectedContainerRelease = numUnexpectedContainerRelease
 
+  private[yarn] def getNumPendingLossReasonRequests: Int = synchronized {
+    pendingLossReasonRequests.size
+  }
+
   /**
    * Split the pending container requests into 3 groups based on current localities of pending
    * tasks.
@@ -582,6 +586,7 @@ private[yarn] class YarnAllocator(
 
     (localityMatched.toSeq, localityUnMatched.toSeq, localityFree.toSeq)
   }
+
 }
 
 private object YarnAllocator {

From 27feafccbd6945b000ca51b14c57912acbad9031 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 4 Nov 2015 09:11:54 -0800
Subject: [PATCH 487/896] [SPARK-11235][NETWORK] Add ability to stream data
 using network lib.

The current interface used to fetch shuffle data is not very efficient for
large buffers; it requires the receiver to buffer the entirety of the
contents being downloaded in memory before processing the data.

To use the network library to transfer large files (such as those that
can be added using SparkContext addJar / addFile), this change adds a
more efficient way of downloding data, by streaming the data and feeding
it to a callback as data arrives.

This is achieved by a custom frame decoder that replaces the current netty
one; this decoder allows entering a mode where framing is skipped and data
is instead provided directly to a callback. The existing netty classes
(ByteToMessageDecoder and LengthFieldBasedFrameDecoder) could not be reused
since their semantics do not allow for the interception approach the new
decoder uses.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9206 from vanzin/SPARK-11235.
---
 .../spark/network/TransportContext.java       |   3 +-
 .../spark/network/client/StreamCallback.java  |  40 +++
 .../network/client/StreamInterceptor.java     |  76 ++++
 .../spark/network/client/TransportClient.java |  41 +++
 .../client/TransportResponseHandler.java      |  47 ++-
 .../network/protocol/ChunkFetchSuccess.java   |  16 +-
 .../spark/network/protocol/Message.java       |   6 +-
 .../network/protocol/MessageDecoder.java      |   9 +
 .../network/protocol/MessageEncoder.java      |  27 +-
 .../network/protocol/ResponseWithBody.java    |  40 +++
 .../spark/network/protocol/StreamFailure.java |  80 +++++
 .../spark/network/protocol/StreamRequest.java |  78 +++++
 .../network/protocol/StreamResponse.java      |  91 +++++
 .../spark/network/server/StreamManager.java   |  13 +
 .../server/TransportRequestHandler.java       |  20 ++
 .../apache/spark/network/util/NettyUtils.java |   9 +-
 .../network/util/TransportFrameDecoder.java   | 154 +++++++++
 .../apache/spark/network/ProtocolSuite.java   |   8 +
 .../org/apache/spark/network/StreamSuite.java | 325 ++++++++++++++++++
 .../util/TransportFrameDecoderSuite.java      | 142 ++++++++
 20 files changed, 1196 insertions(+), 29 deletions(-)
 create mode 100644 network/common/src/main/java/org/apache/spark/network/client/StreamCallback.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/protocol/ResponseWithBody.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/protocol/StreamFailure.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/protocol/StreamRequest.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/protocol/StreamResponse.java
 create mode 100644 network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
 create mode 100644 network/common/src/test/java/org/apache/spark/network/StreamSuite.java
 create mode 100644 network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java

diff --git a/network/common/src/main/java/org/apache/spark/network/TransportContext.java b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
index b8d073fa16b4..43900e6f2c97 100644
--- a/network/common/src/main/java/org/apache/spark/network/TransportContext.java
+++ b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
@@ -39,6 +39,7 @@
 import org.apache.spark.network.server.TransportServerBootstrap;
 import org.apache.spark.network.util.NettyUtils;
 import org.apache.spark.network.util.TransportConf;
+import org.apache.spark.network.util.TransportFrameDecoder;
 
 /**
  * Contains the context to create a {@link TransportServer}, {@link TransportClientFactory}, and to
@@ -119,7 +120,7 @@ public TransportChannelHandler initializePipeline(
       TransportChannelHandler channelHandler = createChannelHandler(channel, channelRpcHandler);
       channel.pipeline()
         .addLast("encoder", encoder)
-        .addLast("frameDecoder", NettyUtils.createFrameDecoder())
+        .addLast(TransportFrameDecoder.HANDLER_NAME, NettyUtils.createFrameDecoder())
         .addLast("decoder", decoder)
         .addLast("idleStateHandler", new IdleStateHandler(0, 0, conf.connectionTimeoutMs() / 1000))
         // NOTE: Chunks are currently guaranteed to be returned in the order of request, but this
diff --git a/network/common/src/main/java/org/apache/spark/network/client/StreamCallback.java b/network/common/src/main/java/org/apache/spark/network/client/StreamCallback.java
new file mode 100644
index 000000000000..093fada320cc
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/client/StreamCallback.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.client;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+/**
+ * Callback for streaming data. Stream data will be offered to the {@link onData(ByteBuffer)}
+ * method as it arrives. Once all the stream data is received, {@link onComplete()} will be
+ * called.
+ * <p>
+ * The network library guarantees that a single thread will call these methods at a time, but
+ * different call may be made by different threads.
+ */
+public interface StreamCallback {
+  /** Called upon receipt of stream data. */
+  void onData(String streamId, ByteBuffer buf) throws IOException;
+
+  /** Called when all data from the stream has been received. */
+  void onComplete(String streamId) throws IOException;
+
+  /** Called if there's an error reading data from the stream. */
+  void onFailure(String streamId, Throwable cause) throws IOException;
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java b/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
new file mode 100644
index 000000000000..02230a00e69f
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.client;
+
+import java.nio.ByteBuffer;
+import java.nio.channels.ClosedChannelException;
+
+import io.netty.buffer.ByteBuf;
+
+import org.apache.spark.network.util.TransportFrameDecoder;
+
+/**
+ * An interceptor that is registered with the frame decoder to feed stream data to a
+ * callback.
+ */
+class StreamInterceptor implements TransportFrameDecoder.Interceptor {
+
+  private final String streamId;
+  private final long byteCount;
+  private final StreamCallback callback;
+
+  private volatile long bytesRead;
+
+  StreamInterceptor(String streamId, long byteCount, StreamCallback callback) {
+    this.streamId = streamId;
+    this.byteCount = byteCount;
+    this.callback = callback;
+    this.bytesRead = 0;
+  }
+
+  @Override
+  public void exceptionCaught(Throwable cause) throws Exception {
+    callback.onFailure(streamId, cause);
+  }
+
+  @Override
+  public void channelInactive() throws Exception {
+    callback.onFailure(streamId, new ClosedChannelException());
+  }
+
+  @Override
+  public boolean handle(ByteBuf buf) throws Exception {
+    int toRead = (int) Math.min(buf.readableBytes(), byteCount - bytesRead);
+    ByteBuffer nioBuffer = buf.readSlice(toRead).nioBuffer();
+
+    int available = nioBuffer.remaining();
+    callback.onData(streamId, nioBuffer);
+    bytesRead += available;
+    if (bytesRead > byteCount) {
+      RuntimeException re = new IllegalStateException(String.format(
+        "Read too many bytes? Expected %d, but read %d.", byteCount, bytesRead));
+      callback.onFailure(streamId, re);
+      throw re;
+    } else if (bytesRead == byteCount) {
+      callback.onComplete(streamId);
+    }
+
+    return bytesRead != byteCount;
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
index fbb8bb6b2f6c..a0ba223e340a 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
@@ -38,6 +38,7 @@
 import org.apache.spark.network.protocol.ChunkFetchRequest;
 import org.apache.spark.network.protocol.RpcRequest;
 import org.apache.spark.network.protocol.StreamChunkId;
+import org.apache.spark.network.protocol.StreamRequest;
 import org.apache.spark.network.util.NettyUtils;
 
 /**
@@ -159,6 +160,46 @@ public void operationComplete(ChannelFuture future) throws Exception {
       });
   }
 
+  /**
+   * Request to stream the data with the given stream ID from the remote end.
+   *
+   * @param streamId The stream to fetch.
+   * @param callback Object to call with the stream data.
+   */
+  public void stream(final String streamId, final StreamCallback callback) {
+    final String serverAddr = NettyUtils.getRemoteAddress(channel);
+    final long startTime = System.currentTimeMillis();
+    logger.debug("Sending stream request for {} to {}", streamId, serverAddr);
+
+    // Need to synchronize here so that the callback is added to the queue and the RPC is
+    // written to the socket atomically, so that callbacks are called in the right order
+    // when responses arrive.
+    synchronized (this) {
+      handler.addStreamCallback(callback);
+      channel.writeAndFlush(new StreamRequest(streamId)).addListener(
+        new ChannelFutureListener() {
+          @Override
+          public void operationComplete(ChannelFuture future) throws Exception {
+            if (future.isSuccess()) {
+              long timeTaken = System.currentTimeMillis() - startTime;
+              logger.trace("Sending request for {} to {} took {} ms", streamId, serverAddr,
+                timeTaken);
+            } else {
+              String errorMsg = String.format("Failed to send request for %s to %s: %s", streamId,
+                serverAddr, future.cause());
+              logger.error(errorMsg, future.cause());
+              channel.close();
+              try {
+                callback.onFailure(streamId, new IOException(errorMsg, future.cause()));
+              } catch (Exception e) {
+                logger.error("Uncaught exception in RPC response callback handler!", e);
+              }
+            }
+          }
+        });
+    }
+  }
+
   /**
    * Sends an opaque message to the RpcHandler on the server-side. The callback will be invoked
    * with the server's response or upon any failure.
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
index 94fc21af5e60..ed3f36af5804 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
@@ -19,7 +19,9 @@
 
 import java.io.IOException;
 import java.util.Map;
+import java.util.Queue;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicLong;
 
 import io.netty.channel.Channel;
@@ -32,8 +34,11 @@
 import org.apache.spark.network.protocol.RpcFailure;
 import org.apache.spark.network.protocol.RpcResponse;
 import org.apache.spark.network.protocol.StreamChunkId;
+import org.apache.spark.network.protocol.StreamFailure;
+import org.apache.spark.network.protocol.StreamResponse;
 import org.apache.spark.network.server.MessageHandler;
 import org.apache.spark.network.util.NettyUtils;
+import org.apache.spark.network.util.TransportFrameDecoder;
 
 /**
  * Handler that processes server responses, in response to requests issued from a
@@ -50,6 +55,8 @@ public class TransportResponseHandler extends MessageHandler<ResponseMessage> {
 
   private final Map<Long, RpcResponseCallback> outstandingRpcs;
 
+  private final Queue<StreamCallback> streamCallbacks;
+
   /** Records the time (in system nanoseconds) that the last fetch or RPC request was sent. */
   private final AtomicLong timeOfLastRequestNs;
 
@@ -57,6 +64,7 @@ public TransportResponseHandler(Channel channel) {
     this.channel = channel;
     this.outstandingFetches = new ConcurrentHashMap<StreamChunkId, ChunkReceivedCallback>();
     this.outstandingRpcs = new ConcurrentHashMap<Long, RpcResponseCallback>();
+    this.streamCallbacks = new ConcurrentLinkedQueue<StreamCallback>();
     this.timeOfLastRequestNs = new AtomicLong(0);
   }
 
@@ -78,6 +86,10 @@ public void removeRpcRequest(long requestId) {
     outstandingRpcs.remove(requestId);
   }
 
+  public void addStreamCallback(StreamCallback callback) {
+    streamCallbacks.offer(callback);
+  }
+
   /**
    * Fire the failure callback for all outstanding requests. This is called when we have an
    * uncaught exception or pre-mature connection termination.
@@ -124,11 +136,11 @@ public void handle(ResponseMessage message) {
       if (listener == null) {
         logger.warn("Ignoring response for block {} from {} since it is not outstanding",
           resp.streamChunkId, remoteAddress);
-        resp.buffer.release();
+        resp.body.release();
       } else {
         outstandingFetches.remove(resp.streamChunkId);
-        listener.onSuccess(resp.streamChunkId.chunkIndex, resp.buffer);
-        resp.buffer.release();
+        listener.onSuccess(resp.streamChunkId.chunkIndex, resp.body);
+        resp.body.release();
       }
     } else if (message instanceof ChunkFetchFailure) {
       ChunkFetchFailure resp = (ChunkFetchFailure) message;
@@ -161,6 +173,34 @@ public void handle(ResponseMessage message) {
         outstandingRpcs.remove(resp.requestId);
         listener.onFailure(new RuntimeException(resp.errorString));
       }
+    } else if (message instanceof StreamResponse) {
+      StreamResponse resp = (StreamResponse) message;
+      StreamCallback callback = streamCallbacks.poll();
+      if (callback != null) {
+        StreamInterceptor interceptor = new StreamInterceptor(resp.streamId, resp.byteCount,
+          callback);
+        try {
+          TransportFrameDecoder frameDecoder = (TransportFrameDecoder)
+            channel.pipeline().get(TransportFrameDecoder.HANDLER_NAME);
+          frameDecoder.setInterceptor(interceptor);
+        } catch (Exception e) {
+          logger.error("Error installing stream handler.", e);
+        }
+      } else {
+        logger.error("Could not find callback for StreamResponse.");
+      }
+    } else if (message instanceof StreamFailure) {
+      StreamFailure resp = (StreamFailure) message;
+      StreamCallback callback = streamCallbacks.poll();
+      if (callback != null) {
+        try {
+          callback.onFailure(resp.streamId, new RuntimeException(resp.error));
+        } catch (IOException ioe) {
+          logger.warn("Error in stream failure handler.", ioe);
+        }
+      } else {
+        logger.warn("Stream failure with unknown callback: {}", resp.error);
+      }
     } else {
       throw new IllegalStateException("Unknown response type: " + message.type());
     }
@@ -175,4 +215,5 @@ public int numOutstandingRequests() {
   public long getTimeOfLastRequestNs() {
     return timeOfLastRequestNs.get();
   }
+
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/ChunkFetchSuccess.java b/network/common/src/main/java/org/apache/spark/network/protocol/ChunkFetchSuccess.java
index c962fb7ecf76..e6a7e9a8b414 100644
--- a/network/common/src/main/java/org/apache/spark/network/protocol/ChunkFetchSuccess.java
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/ChunkFetchSuccess.java
@@ -30,13 +30,12 @@
  * may be written by Netty in a more efficient manner (i.e., zero-copy write).
  * Similarly, the client-side decoding will reuse the Netty ByteBuf as the buffer.
  */
-public final class ChunkFetchSuccess implements ResponseMessage {
+public final class ChunkFetchSuccess extends ResponseWithBody {
   public final StreamChunkId streamChunkId;
-  public final ManagedBuffer buffer;
 
   public ChunkFetchSuccess(StreamChunkId streamChunkId, ManagedBuffer buffer) {
+    super(buffer, true);
     this.streamChunkId = streamChunkId;
-    this.buffer = buffer;
   }
 
   @Override
@@ -53,6 +52,11 @@ public void encode(ByteBuf buf) {
     streamChunkId.encode(buf);
   }
 
+  @Override
+  public ResponseMessage createFailureResponse(String error) {
+    return new ChunkFetchFailure(streamChunkId, error);
+  }
+
   /** Decoding uses the given ByteBuf as our data, and will retain() it. */
   public static ChunkFetchSuccess decode(ByteBuf buf) {
     StreamChunkId streamChunkId = StreamChunkId.decode(buf);
@@ -63,14 +67,14 @@ public static ChunkFetchSuccess decode(ByteBuf buf) {
 
   @Override
   public int hashCode() {
-    return Objects.hashCode(streamChunkId, buffer);
+    return Objects.hashCode(streamChunkId, body);
   }
 
   @Override
   public boolean equals(Object other) {
     if (other instanceof ChunkFetchSuccess) {
       ChunkFetchSuccess o = (ChunkFetchSuccess) other;
-      return streamChunkId.equals(o.streamChunkId) && buffer.equals(o.buffer);
+      return streamChunkId.equals(o.streamChunkId) && body.equals(o.body);
     }
     return false;
   }
@@ -79,7 +83,7 @@ public boolean equals(Object other) {
   public String toString() {
     return Objects.toStringHelper(this)
       .add("streamChunkId", streamChunkId)
-      .add("buffer", buffer)
+      .add("buffer", body)
       .toString();
   }
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/Message.java b/network/common/src/main/java/org/apache/spark/network/protocol/Message.java
index d568370125fd..d01598c20f16 100644
--- a/network/common/src/main/java/org/apache/spark/network/protocol/Message.java
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/Message.java
@@ -27,7 +27,8 @@ public interface Message extends Encodable {
   /** Preceding every serialized Message is its type, which allows us to deserialize it. */
   public static enum Type implements Encodable {
     ChunkFetchRequest(0), ChunkFetchSuccess(1), ChunkFetchFailure(2),
-    RpcRequest(3), RpcResponse(4), RpcFailure(5);
+    RpcRequest(3), RpcResponse(4), RpcFailure(5),
+    StreamRequest(6), StreamResponse(7), StreamFailure(8);
 
     private final byte id;
 
@@ -51,6 +52,9 @@ public static Type decode(ByteBuf buf) {
         case 3: return RpcRequest;
         case 4: return RpcResponse;
         case 5: return RpcFailure;
+        case 6: return StreamRequest;
+        case 7: return StreamResponse;
+        case 8: return StreamFailure;
         default: throw new IllegalArgumentException("Unknown message type: " + id);
       }
     }
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/MessageDecoder.java b/network/common/src/main/java/org/apache/spark/network/protocol/MessageDecoder.java
index 81f8d7f96350..3c04048f3821 100644
--- a/network/common/src/main/java/org/apache/spark/network/protocol/MessageDecoder.java
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/MessageDecoder.java
@@ -63,6 +63,15 @@ private Message decode(Message.Type msgType, ByteBuf in) {
       case RpcFailure:
         return RpcFailure.decode(in);
 
+      case StreamRequest:
+        return StreamRequest.decode(in);
+
+      case StreamResponse:
+        return StreamResponse.decode(in);
+
+      case StreamFailure:
+        return StreamFailure.decode(in);
+
       default:
         throw new IllegalArgumentException("Unexpected message type: " + msgType);
     }
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/MessageEncoder.java b/network/common/src/main/java/org/apache/spark/network/protocol/MessageEncoder.java
index 0f999f5dfe8d..6cce97c807dc 100644
--- a/network/common/src/main/java/org/apache/spark/network/protocol/MessageEncoder.java
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/MessageEncoder.java
@@ -45,27 +45,32 @@ public final class MessageEncoder extends MessageToMessageEncoder<Message> {
   public void encode(ChannelHandlerContext ctx, Message in, List<Object> out) {
     Object body = null;
     long bodyLength = 0;
+    boolean isBodyInFrame = false;
 
-    // Only ChunkFetchSuccesses have data besides the header.
+    // Detect ResponseWithBody messages and get the data buffer out of them.
     // The body is used in order to enable zero-copy transfer for the payload.
-    if (in instanceof ChunkFetchSuccess) {
-      ChunkFetchSuccess resp = (ChunkFetchSuccess) in;
+    if (in instanceof ResponseWithBody) {
+      ResponseWithBody resp = (ResponseWithBody) in;
       try {
-        bodyLength = resp.buffer.size();
-        body = resp.buffer.convertToNetty();
+        bodyLength = resp.body.size();
+        body = resp.body.convertToNetty();
+        isBodyInFrame = resp.isBodyInFrame;
       } catch (Exception e) {
-        // Re-encode this message as BlockFetchFailure.
-        logger.error(String.format("Error opening block %s for client %s",
-          resp.streamChunkId, ctx.channel().remoteAddress()), e);
-        encode(ctx, new ChunkFetchFailure(resp.streamChunkId, e.getMessage()), out);
+        // Re-encode this message as a failure response.
+        String error = e.getMessage() != null ? e.getMessage() : "null";
+        logger.error(String.format("Error processing %s for client %s",
+          resp, ctx.channel().remoteAddress()), e);
+        encode(ctx, resp.createFailureResponse(error), out);
         return;
       }
     }
 
     Message.Type msgType = in.type();
-    // All messages have the frame length, message type, and message itself.
+    // All messages have the frame length, message type, and message itself. The frame length
+    // may optionally include the length of the body data, depending on what message is being
+    // sent.
     int headerLength = 8 + msgType.encodedLength() + in.encodedLength();
-    long frameLength = headerLength + bodyLength;
+    long frameLength = headerLength + (isBodyInFrame ? bodyLength : 0);
     ByteBuf header = ctx.alloc().heapBuffer(headerLength);
     header.writeLong(frameLength);
     msgType.encode(header);
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/ResponseWithBody.java b/network/common/src/main/java/org/apache/spark/network/protocol/ResponseWithBody.java
new file mode 100644
index 000000000000..67be77e39f71
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/ResponseWithBody.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.protocol;
+
+import com.google.common.base.Objects;
+import io.netty.buffer.ByteBuf;
+
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NettyManagedBuffer;
+
+/**
+ * Abstract class for response messages that contain a large data portion kept in a separate
+ * buffer. These messages are treated especially by MessageEncoder.
+ */
+public abstract class ResponseWithBody implements ResponseMessage {
+  public final ManagedBuffer body;
+  public final boolean isBodyInFrame;
+
+  protected ResponseWithBody(ManagedBuffer body, boolean isBodyInFrame) {
+    this.body = body;
+    this.isBodyInFrame = isBodyInFrame;
+  }
+
+  public abstract ResponseMessage createFailureResponse(String error);
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/StreamFailure.java b/network/common/src/main/java/org/apache/spark/network/protocol/StreamFailure.java
new file mode 100644
index 000000000000..e3dade2ebf90
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/StreamFailure.java
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.protocol;
+
+import com.google.common.base.Objects;
+import io.netty.buffer.ByteBuf;
+
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NettyManagedBuffer;
+
+/**
+ * Message indicating an error when transferring a stream.
+ */
+public final class StreamFailure implements ResponseMessage {
+  public final String streamId;
+  public final String error;
+
+  public StreamFailure(String streamId, String error) {
+    this.streamId = streamId;
+    this.error = error;
+  }
+
+  @Override
+  public Type type() { return Type.StreamFailure; }
+
+  @Override
+  public int encodedLength() {
+    return Encoders.Strings.encodedLength(streamId) + Encoders.Strings.encodedLength(error);
+  }
+
+  @Override
+  public void encode(ByteBuf buf) {
+    Encoders.Strings.encode(buf, streamId);
+    Encoders.Strings.encode(buf, error);
+  }
+
+  public static StreamFailure decode(ByteBuf buf) {
+    String streamId = Encoders.Strings.decode(buf);
+    String error = Encoders.Strings.decode(buf);
+    return new StreamFailure(streamId, error);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(streamId, error);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other instanceof StreamFailure) {
+      StreamFailure o = (StreamFailure) other;
+      return streamId.equals(o.streamId) && error.equals(o.error);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return Objects.toStringHelper(this)
+      .add("streamId", streamId)
+      .add("error", error)
+      .toString();
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/StreamRequest.java b/network/common/src/main/java/org/apache/spark/network/protocol/StreamRequest.java
new file mode 100644
index 000000000000..821e8f53884d
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/StreamRequest.java
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.protocol;
+
+import com.google.common.base.Objects;
+import io.netty.buffer.ByteBuf;
+
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NettyManagedBuffer;
+
+/**
+ * Request to stream data from the remote end.
+ * <p>
+ * The stream ID is an arbitrary string that needs to be negotiated between the two endpoints before
+ * the data can be streamed.
+ */
+public final class StreamRequest implements RequestMessage {
+   public final String streamId;
+
+   public StreamRequest(String streamId) {
+     this.streamId = streamId;
+   }
+
+  @Override
+  public Type type() { return Type.StreamRequest; }
+
+  @Override
+  public int encodedLength() {
+    return Encoders.Strings.encodedLength(streamId);
+  }
+
+  @Override
+  public void encode(ByteBuf buf) {
+    Encoders.Strings.encode(buf, streamId);
+  }
+
+  public static StreamRequest decode(ByteBuf buf) {
+    String streamId = Encoders.Strings.decode(buf);
+    return new StreamRequest(streamId);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(streamId);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other instanceof StreamRequest) {
+      StreamRequest o = (StreamRequest) other;
+      return streamId.equals(o.streamId);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return Objects.toStringHelper(this)
+      .add("streamId", streamId)
+      .toString();
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/protocol/StreamResponse.java b/network/common/src/main/java/org/apache/spark/network/protocol/StreamResponse.java
new file mode 100644
index 000000000000..ac5ab9a323a1
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/protocol/StreamResponse.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.protocol;
+
+import com.google.common.base.Objects;
+import io.netty.buffer.ByteBuf;
+
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NettyManagedBuffer;
+
+/**
+ * Response to {@link StreamRequest} when the stream has been successfully opened.
+ * <p>
+ * Note the message itself does not contain the stream data. That is written separately by the
+ * sender. The receiver is expected to set a temporary channel handler that will consume the
+ * number of bytes this message says the stream has.
+ */
+public final class StreamResponse extends ResponseWithBody {
+   public final String streamId;
+   public final long byteCount;
+
+   public StreamResponse(String streamId, long byteCount, ManagedBuffer buffer) {
+     super(buffer, false);
+     this.streamId = streamId;
+     this.byteCount = byteCount;
+   }
+
+  @Override
+  public Type type() { return Type.StreamResponse; }
+
+  @Override
+  public int encodedLength() {
+    return 8 + Encoders.Strings.encodedLength(streamId);
+  }
+
+  /** Encoding does NOT include 'buffer' itself. See {@link MessageEncoder}. */
+  @Override
+  public void encode(ByteBuf buf) {
+    Encoders.Strings.encode(buf, streamId);
+    buf.writeLong(byteCount);
+  }
+
+  @Override
+  public ResponseMessage createFailureResponse(String error) {
+    return new StreamFailure(streamId, error);
+  }
+
+  public static StreamResponse decode(ByteBuf buf) {
+    String streamId = Encoders.Strings.decode(buf);
+    long byteCount = buf.readLong();
+    return new StreamResponse(streamId, byteCount, null);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hashCode(byteCount, streamId);
+  }
+
+  @Override
+  public boolean equals(Object other) {
+    if (other instanceof StreamResponse) {
+      StreamResponse o = (StreamResponse) other;
+      return byteCount == o.byteCount && streamId.equals(o.streamId);
+    }
+    return false;
+  }
+
+  @Override
+  public String toString() {
+    return Objects.toStringHelper(this)
+      .add("streamId", streamId)
+      .add("byteCount", byteCount)
+      .toString();
+  }
+
+}
diff --git a/network/common/src/main/java/org/apache/spark/network/server/StreamManager.java b/network/common/src/main/java/org/apache/spark/network/server/StreamManager.java
index aaa677c96564..3f0155957a14 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/StreamManager.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/StreamManager.java
@@ -46,6 +46,19 @@ public abstract class StreamManager {
    */
   public abstract ManagedBuffer getChunk(long streamId, int chunkIndex);
 
+  /**
+   * Called in response to a stream() request. The returned data is streamed to the client
+   * through a single TCP connection.
+   *
+   * Note the <code>streamId</code> argument is not related to the similarly named argument in the
+   * {@link #getChunk(long, int)} method.
+   *
+   * @param streamId id of a stream that has been previously registered with the StreamManager.
+   */
+  public ManagedBuffer openStream(String streamId) {
+    throw new UnsupportedOperationException();
+  }
+
   /**
    * Associates a stream with a single client connection, which is guaranteed to be the only reader
    * of the stream. The getChunk() method will be called serially on this connection and once the
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
index 9b8b047b49a8..4f67bd573be2 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportRequestHandler.java
@@ -35,6 +35,9 @@
 import org.apache.spark.network.protocol.ChunkFetchSuccess;
 import org.apache.spark.network.protocol.RpcFailure;
 import org.apache.spark.network.protocol.RpcResponse;
+import org.apache.spark.network.protocol.StreamFailure;
+import org.apache.spark.network.protocol.StreamRequest;
+import org.apache.spark.network.protocol.StreamResponse;
 import org.apache.spark.network.util.NettyUtils;
 
 /**
@@ -92,6 +95,8 @@ public void handle(RequestMessage request) {
       processFetchRequest((ChunkFetchRequest) request);
     } else if (request instanceof RpcRequest) {
       processRpcRequest((RpcRequest) request);
+    } else if (request instanceof StreamRequest) {
+      processStreamRequest((StreamRequest) request);
     } else {
       throw new IllegalArgumentException("Unknown request type: " + request);
     }
@@ -117,6 +122,21 @@ private void processFetchRequest(final ChunkFetchRequest req) {
     respond(new ChunkFetchSuccess(req.streamChunkId, buf));
   }
 
+  private void processStreamRequest(final StreamRequest req) {
+    final String client = NettyUtils.getRemoteAddress(channel);
+    ManagedBuffer buf;
+    try {
+      buf = streamManager.openStream(req.streamId);
+    } catch (Exception e) {
+      logger.error(String.format(
+        "Error opening stream %s for request from %s", req.streamId, client), e);
+      respond(new StreamFailure(req.streamId, Throwables.getStackTraceAsString(e)));
+      return;
+    }
+
+    respond(new StreamResponse(req.streamId, buf.size(), buf));
+  }
+
   private void processRpcRequest(final RpcRequest req) {
     try {
       rpcHandler.receive(reverseClient, req.message, new RpcResponseCallback() {
diff --git a/network/common/src/main/java/org/apache/spark/network/util/NettyUtils.java b/network/common/src/main/java/org/apache/spark/network/util/NettyUtils.java
index 26c6399ce7db..caa7260bc828 100644
--- a/network/common/src/main/java/org/apache/spark/network/util/NettyUtils.java
+++ b/network/common/src/main/java/org/apache/spark/network/util/NettyUtils.java
@@ -89,13 +89,8 @@ public static Class<? extends ServerChannel> getServerChannelClass(IOMode mode)
    * Creates a LengthFieldBasedFrameDecoder where the first 8 bytes are the length of the frame.
    * This is used before all decoders.
    */
-  public static ByteToMessageDecoder createFrameDecoder() {
-    // maxFrameLength = 2G
-    // lengthFieldOffset = 0
-    // lengthFieldLength = 8
-    // lengthAdjustment = -8, i.e. exclude the 8 byte length itself
-    // initialBytesToStrip = 8, i.e. strip out the length field itself
-    return new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 8, -8, 8);
+  public static TransportFrameDecoder createFrameDecoder() {
+    return new TransportFrameDecoder();
   }
 
   /** Returns the remote address on the channel or "&lt;unknown remote&gt;" if none exists. */
diff --git a/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java b/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
new file mode 100644
index 000000000000..272ea84e6180
--- /dev/null
+++ b/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
@@ -0,0 +1,154 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.util;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.CompositeByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+
+/**
+ * A customized frame decoder that allows intercepting raw data.
+ * <p>
+ * This behaves like Netty's frame decoder (with harcoded parameters that match this library's
+ * needs), except it allows an interceptor to be installed to read data directly before it's
+ * framed.
+ * <p>
+ * Unlike Netty's frame decoder, each frame is dispatched to child handlers as soon as it's
+ * decoded, instead of building as many frames as the current buffer allows and dispatching
+ * all of them. This allows a child handler to install an interceptor if needed.
+ * <p>
+ * If an interceptor is installed, framing stops, and data is instead fed directly to the
+ * interceptor. When the interceptor indicates that it doesn't need to read any more data,
+ * framing resumes. Interceptors should not hold references to the data buffers provided
+ * to their handle() method.
+ */
+public class TransportFrameDecoder extends ChannelInboundHandlerAdapter {
+
+  public static final String HANDLER_NAME = "frameDecoder";
+  private static final int LENGTH_SIZE = 8;
+  private static final int MAX_FRAME_SIZE = Integer.MAX_VALUE;
+
+  private CompositeByteBuf buffer;
+  private volatile Interceptor interceptor;
+
+  @Override
+  public void channelRead(ChannelHandlerContext ctx, Object data) throws Exception {
+    ByteBuf in = (ByteBuf) data;
+
+    if (buffer == null) {
+      buffer = in.alloc().compositeBuffer();
+    }
+
+    buffer.writeBytes(in);
+
+    while (buffer.isReadable()) {
+      feedInterceptor();
+      if (interceptor != null) {
+        continue;
+      }
+
+      ByteBuf frame = decodeNext();
+      if (frame != null) {
+        ctx.fireChannelRead(frame);
+      } else {
+        break;
+      }
+    }
+
+    // We can't discard read sub-buffers if there are other references to the buffer (e.g.
+    // through slices used for framing). This assumes that code that retains references
+    // will call retain() from the thread that called "fireChannelRead()" above, otherwise
+    // ref counting will go awry.
+    if (buffer != null && buffer.refCnt() == 1) {
+      buffer.discardReadComponents();
+    }
+  }
+
+  protected ByteBuf decodeNext() throws Exception {
+    if (buffer.readableBytes() < LENGTH_SIZE) {
+      return null;
+    }
+
+    int frameLen = (int) buffer.readLong() - LENGTH_SIZE;
+    if (buffer.readableBytes() < frameLen) {
+      buffer.readerIndex(buffer.readerIndex() - LENGTH_SIZE);
+      return null;
+    }
+
+    Preconditions.checkArgument(frameLen < MAX_FRAME_SIZE, "Too large frame: %s", frameLen);
+    Preconditions.checkArgument(frameLen > 0, "Frame length should be positive: %s", frameLen);
+
+    ByteBuf frame = buffer.readSlice(frameLen);
+    frame.retain();
+    return frame;
+  }
+
+  @Override
+  public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+    if (buffer != null) {
+      if (buffer.isReadable()) {
+        feedInterceptor();
+      }
+      buffer.release();
+    }
+    if (interceptor != null) {
+      interceptor.channelInactive();
+    }
+    super.channelInactive(ctx);
+  }
+
+  @Override
+  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+    if (interceptor != null) {
+      interceptor.exceptionCaught(cause);
+    }
+    super.exceptionCaught(ctx, cause);
+  }
+
+  public void setInterceptor(Interceptor interceptor) {
+    Preconditions.checkState(this.interceptor == null, "Already have an interceptor.");
+    this.interceptor = interceptor;
+  }
+
+  private void feedInterceptor() throws Exception {
+    if (interceptor != null && !interceptor.handle(buffer)) {
+      interceptor = null;
+    }
+  }
+
+  public static interface Interceptor {
+
+    /**
+     * Handles data received from the remote end.
+     *
+     * @param data Buffer containing data.
+     * @return "true" if the interceptor expects more data, "false" to uninstall the interceptor.
+     */
+    boolean handle(ByteBuf data) throws Exception;
+
+    /** Called if an exception is thrown in the channel pipeline. */
+    void exceptionCaught(Throwable cause) throws Exception;
+
+    /** Called if the channel is closed and the interceptor is still installed. */
+    void channelInactive() throws Exception;
+
+  }
+
+}
diff --git a/network/common/src/test/java/org/apache/spark/network/ProtocolSuite.java b/network/common/src/test/java/org/apache/spark/network/ProtocolSuite.java
index d500bc3c98a7..22b451fc0e60 100644
--- a/network/common/src/test/java/org/apache/spark/network/ProtocolSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/ProtocolSuite.java
@@ -39,6 +39,9 @@
 import org.apache.spark.network.protocol.RpcRequest;
 import org.apache.spark.network.protocol.RpcResponse;
 import org.apache.spark.network.protocol.StreamChunkId;
+import org.apache.spark.network.protocol.StreamFailure;
+import org.apache.spark.network.protocol.StreamRequest;
+import org.apache.spark.network.protocol.StreamResponse;
 import org.apache.spark.network.util.ByteArrayWritableChannel;
 import org.apache.spark.network.util.NettyUtils;
 
@@ -80,6 +83,7 @@ public void requests() {
     testClientToServer(new ChunkFetchRequest(new StreamChunkId(1, 2)));
     testClientToServer(new RpcRequest(12345, new byte[0]));
     testClientToServer(new RpcRequest(12345, new byte[100]));
+    testClientToServer(new StreamRequest("abcde"));
   }
 
   @Test
@@ -92,6 +96,10 @@ public void responses() {
     testServerToClient(new RpcResponse(12345, new byte[1000]));
     testServerToClient(new RpcFailure(0, "this is an error"));
     testServerToClient(new RpcFailure(0, ""));
+    // Note: buffer size must be "0" since StreamResponse's buffer is written differently to the
+    // channel and cannot be tested like this.
+    testServerToClient(new StreamResponse("anId", 12345L, new TestManagedBuffer(0)));
+    testServerToClient(new StreamFailure("anId", "this is an error"));
   }
 
   /**
diff --git a/network/common/src/test/java/org/apache/spark/network/StreamSuite.java b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
new file mode 100644
index 000000000000..6dcec831dec7
--- /dev/null
+++ b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
@@ -0,0 +1,325 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import com.google.common.io.Files;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+import org.apache.spark.network.buffer.FileSegmentManagedBuffer;
+import org.apache.spark.network.buffer.ManagedBuffer;
+import org.apache.spark.network.buffer.NioManagedBuffer;
+import org.apache.spark.network.client.RpcResponseCallback;
+import org.apache.spark.network.client.StreamCallback;
+import org.apache.spark.network.client.TransportClient;
+import org.apache.spark.network.client.TransportClientFactory;
+import org.apache.spark.network.server.RpcHandler;
+import org.apache.spark.network.server.StreamManager;
+import org.apache.spark.network.server.TransportServer;
+import org.apache.spark.network.util.SystemPropertyConfigProvider;
+import org.apache.spark.network.util.TransportConf;
+
+public class StreamSuite {
+  private static final String[] STREAMS = { "largeBuffer", "smallBuffer", "file" };
+
+  private static TransportServer server;
+  private static TransportClientFactory clientFactory;
+  private static File testFile;
+  private static File tempDir;
+
+  private static ByteBuffer smallBuffer;
+  private static ByteBuffer largeBuffer;
+
+  private static ByteBuffer createBuffer(int bufSize) {
+    ByteBuffer buf = ByteBuffer.allocate(bufSize);
+    for (int i = 0; i < bufSize; i ++) {
+      buf.put((byte) i);
+    }
+    buf.flip();
+    return buf;
+  }
+
+  @BeforeClass
+  public static void setUp() throws Exception {
+    tempDir = Files.createTempDir();
+    smallBuffer = createBuffer(100);
+    largeBuffer = createBuffer(100000);
+
+    testFile = File.createTempFile("stream-test-file", "txt", tempDir);
+    FileOutputStream fp = new FileOutputStream(testFile);
+    try {
+      Random rnd = new Random();
+      for (int i = 0; i < 512; i++) {
+        byte[] fileContent = new byte[1024];
+        rnd.nextBytes(fileContent);
+        fp.write(fileContent);
+      }
+    } finally {
+      fp.close();
+    }
+
+    final TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+    final StreamManager streamManager = new StreamManager() {
+      @Override
+      public ManagedBuffer getChunk(long streamId, int chunkIndex) {
+        throw new UnsupportedOperationException();
+      }
+
+      @Override
+      public ManagedBuffer openStream(String streamId) {
+        switch (streamId) {
+          case "largeBuffer":
+            return new NioManagedBuffer(largeBuffer);
+          case "smallBuffer":
+            return new NioManagedBuffer(smallBuffer);
+          case "file":
+            return new FileSegmentManagedBuffer(conf, testFile, 0, testFile.length());
+          default:
+            throw new IllegalArgumentException("Invalid stream: " + streamId);
+        }
+      }
+    };
+    RpcHandler handler = new RpcHandler() {
+      @Override
+      public void receive(TransportClient client, byte[] message, RpcResponseCallback callback) {
+        throw new UnsupportedOperationException();
+      }
+
+      @Override
+      public StreamManager getStreamManager() {
+        return streamManager;
+      }
+    };
+    TransportContext context = new TransportContext(conf, handler);
+    server = context.createServer();
+    clientFactory = context.createClientFactory();
+  }
+
+  @AfterClass
+  public static void tearDown() {
+    server.close();
+    clientFactory.close();
+    if (tempDir != null) {
+      for (File f : tempDir.listFiles()) {
+        f.delete();
+      }
+      tempDir.delete();
+    }
+  }
+
+  @Test
+  public void testSingleStream() throws Throwable {
+    TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
+    try {
+      StreamTask task = new StreamTask(client, "largeBuffer", TimeUnit.SECONDS.toMillis(5));
+      task.run();
+      task.check();
+    } finally {
+      client.close();
+    }
+  }
+
+  @Test
+  public void testMultipleStreams() throws Throwable {
+    TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
+    try {
+      for (int i = 0; i < 20; i++) {
+        StreamTask task = new StreamTask(client, STREAMS[i % STREAMS.length],
+          TimeUnit.SECONDS.toMillis(5));
+        task.run();
+        task.check();
+      }
+    } finally {
+      client.close();
+    }
+  }
+
+  @Test
+  public void testConcurrentStreams() throws Throwable {
+    ExecutorService executor = Executors.newFixedThreadPool(20);
+    TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
+
+    try {
+      List<StreamTask> tasks = new ArrayList<>();
+      for (int i = 0; i < 20; i++) {
+        StreamTask task = new StreamTask(client, STREAMS[i % STREAMS.length],
+          TimeUnit.SECONDS.toMillis(20));
+        tasks.add(task);
+        executor.submit(task);
+      }
+
+      executor.shutdown();
+      assertTrue("Timed out waiting for tasks.", executor.awaitTermination(30, TimeUnit.SECONDS));
+      for (StreamTask task : tasks) {
+        task.check();
+      }
+    } finally {
+      executor.shutdownNow();
+      client.close();
+    }
+  }
+
+  private static class StreamTask implements Runnable {
+
+    private final TransportClient client;
+    private final String streamId;
+    private final long timeoutMs;
+    private Throwable error;
+
+    StreamTask(TransportClient client, String streamId, long timeoutMs) {
+      this.client = client;
+      this.streamId = streamId;
+      this.timeoutMs = timeoutMs;
+    }
+
+    @Override
+    public void run() {
+      ByteBuffer srcBuffer = null;
+      OutputStream out = null;
+      File outFile = null;
+      try {
+        ByteArrayOutputStream baos = null;
+
+        switch (streamId) {
+          case "largeBuffer":
+            baos = new ByteArrayOutputStream();
+            out = baos;
+            srcBuffer = largeBuffer;
+            break;
+          case "smallBuffer":
+            baos = new ByteArrayOutputStream();
+            out = baos;
+            srcBuffer = smallBuffer;
+            break;
+          case "file":
+            outFile = File.createTempFile("data", ".tmp", tempDir);
+            out = new FileOutputStream(outFile);
+            break;
+          default:
+            throw new IllegalArgumentException(streamId);
+        }
+
+        TestCallback callback = new TestCallback(out);
+        client.stream(streamId, callback);
+        waitForCompletion(callback);
+
+        if (srcBuffer == null) {
+          assertTrue("File stream did not match.", Files.equal(testFile, outFile));
+        } else {
+          ByteBuffer base;
+          synchronized (srcBuffer) {
+            base = srcBuffer.duplicate();
+          }
+          byte[] result = baos.toByteArray();
+          byte[] expected = new byte[base.remaining()];
+          base.get(expected);
+          assertEquals(expected.length, result.length);
+          assertTrue("buffers don't match", Arrays.equals(expected, result));
+        }
+      } catch (Throwable t) {
+        error = t;
+      } finally {
+        if (out != null) {
+          try {
+            out.close();
+          } catch (Exception e) {
+            // ignore.
+          }
+        }
+        if (outFile != null) {
+          outFile.delete();
+        }
+      }
+    }
+
+    public void check() throws Throwable {
+      if (error != null) {
+        throw error;
+      }
+    }
+
+    private void waitForCompletion(TestCallback callback) throws Exception {
+      long now = System.currentTimeMillis();
+      long deadline = now + timeoutMs;
+      synchronized (callback) {
+        while (!callback.completed && now < deadline) {
+          callback.wait(deadline - now);
+          now = System.currentTimeMillis();
+        }
+      }
+      assertTrue("Timed out waiting for stream.", callback.completed);
+      assertNull(callback.error);
+    }
+
+  }
+
+  private static class TestCallback implements StreamCallback {
+
+    private final OutputStream out;
+    public volatile boolean completed;
+    public volatile Throwable error;
+
+    TestCallback(OutputStream out) {
+      this.out = out;
+      this.completed = false;
+    }
+
+    @Override
+    public void onData(String streamId, ByteBuffer buf) throws IOException {
+      byte[] tmp = new byte[buf.remaining()];
+      buf.get(tmp);
+      out.write(tmp);
+    }
+
+    @Override
+    public void onComplete(String streamId) throws IOException {
+      out.close();
+      synchronized (this) {
+        completed = true;
+        notifyAll();
+      }
+    }
+
+    @Override
+    public void onFailure(String streamId, Throwable cause) {
+      error = cause;
+      synchronized (this) {
+        completed = true;
+        notifyAll();
+      }
+    }
+
+  }
+
+}
diff --git a/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java b/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
new file mode 100644
index 000000000000..ca74f0a00cf9
--- /dev/null
+++ b/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
@@ -0,0 +1,142 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.util;
+
+import java.nio.ByteBuffer;
+import java.util.Random;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelHandlerContext;
+import org.junit.Test;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+public class TransportFrameDecoderSuite {
+
+  @Test
+  public void testFrameDecoding() throws Exception {
+    Random rnd = new Random();
+    TransportFrameDecoder decoder = new TransportFrameDecoder();
+    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+
+    final int frameCount = 100;
+    ByteBuf data = Unpooled.buffer();
+    try {
+      for (int i = 0; i < frameCount; i++) {
+        byte[] frame = new byte[1024 * (rnd.nextInt(31) + 1)];
+        data.writeLong(frame.length + 8);
+        data.writeBytes(frame);
+      }
+
+      while (data.isReadable()) {
+        int size = rnd.nextInt(16 * 1024) + 256;
+        decoder.channelRead(ctx, data.readSlice(Math.min(data.readableBytes(), size)));
+      }
+
+      verify(ctx, times(frameCount)).fireChannelRead(any(ByteBuf.class));
+    } finally {
+      data.release();
+    }
+  }
+
+  @Test
+  public void testInterception() throws Exception {
+    final int interceptedReads = 3;
+    TransportFrameDecoder decoder = new TransportFrameDecoder();
+    TransportFrameDecoder.Interceptor interceptor = spy(new MockInterceptor(interceptedReads));
+    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+
+    byte[] data = new byte[8];
+    ByteBuf len = Unpooled.copyLong(8 + data.length);
+    ByteBuf dataBuf = Unpooled.wrappedBuffer(data);
+
+    try {
+      decoder.setInterceptor(interceptor);
+      for (int i = 0; i < interceptedReads; i++) {
+        decoder.channelRead(ctx, dataBuf);
+        dataBuf.release();
+        dataBuf = Unpooled.wrappedBuffer(data);
+      }
+      decoder.channelRead(ctx, len);
+      decoder.channelRead(ctx, dataBuf);
+      verify(interceptor, times(interceptedReads)).handle(any(ByteBuf.class));
+      verify(ctx).fireChannelRead(any(ByteBuffer.class));
+    } finally {
+      len.release();
+      dataBuf.release();
+    }
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testNegativeFrameSize() throws Exception {
+    testInvalidFrame(-1);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testEmptyFrame() throws Exception {
+    // 8 because frame size includes the frame length.
+    testInvalidFrame(8);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testLargeFrame() throws Exception {
+    // Frame length includes the frame size field, so need to add a few more bytes.
+    testInvalidFrame(Integer.MAX_VALUE + 9);
+  }
+
+  private void testInvalidFrame(long size) throws Exception {
+    TransportFrameDecoder decoder = new TransportFrameDecoder();
+    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+    ByteBuf frame = Unpooled.copyLong(size);
+    try {
+      decoder.channelRead(ctx, frame);
+    } finally {
+      frame.release();
+    }
+  }
+
+  private static class MockInterceptor implements TransportFrameDecoder.Interceptor {
+
+    private int remainingReads;
+
+    MockInterceptor(int readCount) {
+      this.remainingReads = readCount;
+    }
+
+    @Override
+    public boolean handle(ByteBuf data) throws Exception {
+      data.readerIndex(data.readerIndex() + data.readableBytes());
+      assertFalse(data.isReadable());
+      remainingReads -= 1;
+      return remainingReads != 0;
+    }
+
+    @Override
+    public void exceptionCaught(Throwable cause) throws Exception {
+
+    }
+
+    @Override
+    public void channelInactive() throws Exception {
+
+    }
+
+  }
+
+}

From cd1df662386c599a9d0968b9fc14f27b0883d285 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 09:32:30 -0800
Subject: [PATCH 488/896] [SPARK-11485][SQL] Make DataFrameHolder and
 DatasetHolder public.

These two classes should be public, since they are used in public code.

Author: Reynold Xin <rxin@databricks.com>

Closes #9445 from rxin/SPARK-11485.
---
 project/MimaExcludes.scala                            |  3 +++
 .../scala/org/apache/spark/sql/DataFrameHolder.scala  |  7 ++++++-
 .../scala/org/apache/spark/sql/DatasetHolder.scala    | 11 ++++++++---
 .../scala/org/apache/spark/sql/SQLImplicits.scala     |  4 ++++
 4 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index eeef96c378bd..90dc947d4e58 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -161,6 +161,9 @@ object MimaExcludes {
           "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$23"),
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$24")
+      ) ++ Seq(
+        // SPARK-11485
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.DataFrameHolder.df")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameHolder.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameHolder.scala
index 2f19ec040301..3b30337f1f87 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameHolder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameHolder.scala
@@ -20,9 +20,14 @@ package org.apache.spark.sql
 /**
  * A container for a [[DataFrame]], used for implicit conversions.
  *
+ * To use this, import implicit conversions in SQL:
+ * {{{
+ *   import sqlContext.implicits._
+ * }}}
+ *
  * @since 1.3.0
  */
-private[sql] case class DataFrameHolder(df: DataFrame) {
+case class DataFrameHolder private[sql](private val df: DataFrame) {
 
   // This is declared with parentheses to prevent the Scala compiler from treating
   // `rdd.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
index 17817cbcc5e0..45f0098b9288 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
@@ -18,11 +18,16 @@
 package org.apache.spark.sql
 
 /**
- * A container for a [[DataFrame]], used for implicit conversions.
+ * A container for a [[Dataset]], used for implicit conversions.
  *
- * @since 1.3.0
+ * To use this, import implicit conversions in SQL:
+ * {{{
+ *   import sqlContext.implicits._
+ * }}}
+ *
+ * @since 1.6.0
  */
-private[sql] case class DatasetHolder[T](df: Dataset[T]) {
+case class DatasetHolder[T] private[sql](private val df: Dataset[T]) {
 
   // This is declared with parentheses to prevent the Scala compiler from treating
   // `rdd.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index f2904e270811..6da46a5f7ef9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -52,6 +52,10 @@ abstract class SQLImplicits {
     DatasetHolder(_sqlContext.createDataset(rdd))
   }
 
+  /**
+   * Creates a [[Dataset]] from a local Seq.
+   * @since 1.6.0
+   */
   implicit def localSeqToDatasetHolder[T : Encoder](s: Seq[T]): DatasetHolder[T] = {
     DatasetHolder(_sqlContext.createDataset(s))
   }

From e0fc9c7e59848cb78f8d598898bfca004a3710d8 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 4 Nov 2015 09:33:30 -0800
Subject: [PATCH 489/896] [SPARK-11197][SQL] add doc for run SQL on files
 directly

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9467 from cloud-fan/doc.
---
 docs/sql-programming-guide.md | 38 +++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 510b3599721a..2fe5c3633889 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -882,6 +882,44 @@ saveDF(select(df, "name", "age"), "namesAndAges.parquet", "parquet")
 </div>
 </div>
 
+### Run SQL on files directly
+
+Instead of using read API to load a file into DataFrame and query it, you can also query that
+file directly with SQL.
+
+<div class="codetabs">
+<div data-lang="scala"  markdown="1">
+
+{% highlight scala %}
+val df = sqlContext.sql("SELECT * FROM parquet.`examples/src/main/resources/users.parquet`")
+{% endhighlight %}
+
+</div>
+
+<div data-lang="java"  markdown="1">
+
+{% highlight java %}
+DataFrame df = sqlContext.sql("SELECT * FROM parquet.`examples/src/main/resources/users.parquet`");
+{% endhighlight %}
+</div>
+
+<div data-lang="python"  markdown="1">
+
+{% highlight python %}
+df = sqlContext.sql("SELECT * FROM parquet.`examples/src/main/resources/users.parquet`")
+{% endhighlight %}
+
+</div>
+
+<div data-lang="r"  markdown="1">
+
+{% highlight r %}
+df <- sql(sqlContext, "SELECT * FROM parquet.`examples/src/main/resources/users.parquet`")
+{% endhighlight %}
+
+</div>
+</div>
+
 ### Save Modes
 
 Save operations can optionally take a `SaveMode`, that specifies how to handle existing data if

From 3bd6f5d2ae503468de0e218d51c331e249a862bb Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 09:34:52 -0800
Subject: [PATCH 490/896] [SPARK-11490][SQL] variance should alias var_samp
 instead of var_pop.

stddev is an alias for stddev_samp. variance should be consistent with stddev.

Also took the chance to remove internal Stddev and Variance, and only kept StddevSamp/StddevPop and VarianceSamp/VariancePop.

Author: Reynold Xin <rxin@databricks.com>

Closes #9449 from rxin/SPARK-11490.
---
 .../catalyst/analysis/FunctionRegistry.scala  |  4 +-
 .../catalyst/analysis/HiveTypeCoercion.scala  |  2 -
 .../spark/sql/catalyst/dsl/package.scala      |  8 ----
 .../expressions/aggregate/functions.scala     | 29 ------------
 .../expressions/aggregate/utils.scala         | 12 -----
 .../sql/catalyst/expressions/aggregates.scala | 45 +++++--------------
 .../org/apache/spark/sql/DataFrame.scala      |  2 +-
 .../org/apache/spark/sql/GroupedData.scala    |  4 +-
 .../org/apache/spark/sql/functions.scala      |  9 ++--
 .../spark/sql/DataFrameAggregateSuite.scala   | 17 +++----
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 14 +++---
 11 files changed, 32 insertions(+), 114 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index 24c1a7b7ac5a..d4334d16289a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -187,11 +187,11 @@ object FunctionRegistry {
     expression[Max]("max"),
     expression[Average]("mean"),
     expression[Min]("min"),
-    expression[Stddev]("stddev"),
+    expression[StddevSamp]("stddev"),
     expression[StddevPop]("stddev_pop"),
     expression[StddevSamp]("stddev_samp"),
     expression[Sum]("sum"),
-    expression[Variance]("variance"),
+    expression[VarianceSamp]("variance"),
     expression[VariancePop]("var_pop"),
     expression[VarianceSamp]("var_samp"),
     expression[Skewness]("skewness"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 3c675672dab8..84e2b1366f62 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -297,10 +297,8 @@ object HiveTypeCoercion {
       case Sum(e @ StringType()) => Sum(Cast(e, DoubleType))
       case SumDistinct(e @ StringType()) => Sum(Cast(e, DoubleType))
       case Average(e @ StringType()) => Average(Cast(e, DoubleType))
-      case Stddev(e @ StringType()) => Stddev(Cast(e, DoubleType))
       case StddevPop(e @ StringType()) => StddevPop(Cast(e, DoubleType))
       case StddevSamp(e @ StringType()) => StddevSamp(Cast(e, DoubleType))
-      case Variance(e @ StringType()) => Variance(Cast(e, DoubleType))
       case VariancePop(e @ StringType()) => VariancePop(Cast(e, DoubleType))
       case VarianceSamp(e @ StringType()) => VarianceSamp(Cast(e, DoubleType))
       case Skewness(e @ StringType()) => Skewness(Cast(e, DoubleType))
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
index 787f67a297e3..d8df66430a69 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
@@ -159,14 +159,6 @@ package object dsl {
     def lower(e: Expression): Expression = Lower(e)
     def sqrt(e: Expression): Expression = Sqrt(e)
     def abs(e: Expression): Expression = Abs(e)
-    def stddev(e: Expression): Expression = Stddev(e)
-    def stddev_pop(e: Expression): Expression = StddevPop(e)
-    def stddev_samp(e: Expression): Expression = StddevSamp(e)
-    def variance(e: Expression): Expression = Variance(e)
-    def var_pop(e: Expression): Expression = VariancePop(e)
-    def var_samp(e: Expression): Expression = VarianceSamp(e)
-    def skewness(e: Expression): Expression = Skewness(e)
-    def kurtosis(e: Expression): Expression = Kurtosis(e)
 
     implicit class DslSymbol(sym: Symbol) extends ImplicitAttribute { def s: String = sym.name }
     // TODO more implicit class for literal?
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
index f2c3eca09511..10dc5e64b7ec 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
@@ -328,13 +328,6 @@ case class Min(child: Expression) extends DeclarativeAggregate {
   override val evaluateExpression = min
 }
 
-// Compute the sample standard deviation of a column
-case class Stddev(child: Expression) extends StddevAgg(child) {
-
-  override def isSample: Boolean = true
-  override def prettyName: String = "stddev"
-}
-
 // Compute the population standard deviation of a column
 case class StddevPop(child: Expression) extends StddevAgg(child) {
 
@@ -1274,28 +1267,6 @@ abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate w
   }
 }
 
-case class Variance(child: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def prettyName: String = "variance"
-
-  override protected val momentOrder = 2
-
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
-    require(moments.length == momentOrder + 1,
-      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
-
-    if (n == 0.0) Double.NaN else moments(2) / n
-  }
-}
-
 case class VarianceSamp(child: Expression,
     mutableAggBufferOffset: Int = 0,
     inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
index 564174f9b64e..644c6211d5f3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
@@ -97,12 +97,6 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = false)
 
-        case expressions.Stddev(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Stddev(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
         case expressions.StddevPop(child) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.StddevPop(child),
@@ -139,12 +133,6 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = false)
 
-        case expressions.Variance(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Variance(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
         case expressions.VariancePop(child) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.VariancePop(child),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index bf59660c385e..89d63abd9f27 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -785,13 +785,6 @@ abstract class StddevAgg1(child: Expression) extends UnaryExpression with Partia
 
 }
 
-// Compute the sample standard deviation of a column
-case class Stddev(child: Expression) extends StddevAgg1(child) {
-
-  override def toString: String = s"STDDEV($child)"
-  override def isSample: Boolean = true
-}
-
 // Compute the population standard deviation of a column
 case class StddevPop(child: Expression) extends StddevAgg1(child) {
 
@@ -807,20 +800,21 @@ case class StddevSamp(child: Expression) extends StddevAgg1(child) {
 }
 
 case class ComputePartialStd(child: Expression) extends UnaryExpression with AggregateExpression1 {
-    def this() = this(null)
-
-    override def children: Seq[Expression] = child :: Nil
-    override def nullable: Boolean = false
-    override def dataType: DataType = ArrayType(DoubleType)
-    override def toString: String = s"computePartialStddev($child)"
-    override def newInstance(): ComputePartialStdFunction =
-      new ComputePartialStdFunction(child, this)
+  def this() = this(null)
+
+  override def children: Seq[Expression] = child :: Nil
+  override def nullable: Boolean = false
+  override def dataType: DataType = ArrayType(DoubleType)
+  override def toString: String = s"computePartialStddev($child)"
+  override def newInstance(): ComputePartialStdFunction =
+    new ComputePartialStdFunction(child, this)
 }
 
 case class ComputePartialStdFunction (
     expr: Expression,
     base: AggregateExpression1
-) extends AggregateFunction1 {
+  ) extends AggregateFunction1 {
+
   def this() = this(null, null)  // Required for serialization
 
   private val computeType = DoubleType
@@ -1048,25 +1042,6 @@ case class Skewness(child: Expression) extends UnaryExpression with AggregateExp
   override def toString: String = s"SKEWNESS($child)"
 }
 
-// placeholder
-case class Variance(child: Expression) extends UnaryExpression with AggregateExpression1 {
-
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
-      "please set spark.sql.useAggregate2 = true")
-  }
-
-  override def nullable: Boolean = false
-
-  override def dataType: DoubleType.type = DoubleType
-
-  override def foldable: Boolean = false
-
-  override def prettyName: String = "variance"
-
-  override def toString: String = s"VARIANCE($child)"
-}
-
 // placeholder
 case class VariancePop(child: Expression) extends UnaryExpression with AggregateExpression1 {
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index fc0ab632f993..5e9c7efbbf16 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1383,7 +1383,7 @@ class DataFrame private[sql](
     val statistics = List[(String, Expression => Expression)](
       "count" -> Count,
       "mean" -> Average,
-      "stddev" -> Stddev,
+      "stddev" -> StddevSamp,
       "min" -> Min,
       "max" -> Max)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index c2b2a4013d51..7cf66b65c872 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -96,10 +96,10 @@ class GroupedData protected[sql](
       case "avg" | "average" | "mean" => Average
       case "max" => Max
       case "min" => Min
-      case "stddev" | "std" => Stddev
+      case "stddev" | "std" => StddevSamp
       case "stddev_pop" => StddevPop
       case "stddev_samp" => StddevSamp
-      case "variance" => Variance
+      case "variance" => VarianceSamp
       case "var_pop" => VariancePop
       case "var_samp" => VarianceSamp
       case "sum" => Sum
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index c8c52831668c..c70c965a9b04 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -329,13 +329,12 @@ object functions {
   def skewness(e: Column): Column = Skewness(e.expr)
 
   /**
-   * Aggregate function: returns the unbiased sample standard deviation of
-   * the expression in a group.
+   * Aggregate function: alias for [[stddev_samp]].
    *
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev(e: Column): Column = Stddev(e.expr)
+  def stddev(e: Column): Column = StddevSamp(e.expr)
 
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
@@ -388,12 +387,12 @@ object functions {
   def sumDistinct(columnName: String): Column = sumDistinct(Column(columnName))
 
   /**
-   * Aggregate function: returns the population variance of the values in a group.
+   * Aggregate function: alias for [[var_samp]].
    *
    * @group agg_funcs
    * @since 1.6.0
    */
-  def variance(e: Column): Column = Variance(e.expr)
+  def variance(e: Column): Column = VarianceSamp(e.expr)
 
   /**
    * Aggregate function: returns the unbiased variance of the values in a group.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index 9b23977c765d..b0e2ffaa6068 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -226,23 +226,18 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     val absTol = 1e-8
 
     val sparkVariance = testData2.agg(variance('a))
-    val expectedVariance = Row(4.0 / 6.0)
-    checkAggregatesWithTol(sparkVariance, expectedVariance, absTol)
+    checkAggregatesWithTol(sparkVariance, Row(4.0 / 5.0), absTol)
     val sparkVariancePop = testData2.agg(var_pop('a))
-    checkAggregatesWithTol(sparkVariancePop, expectedVariance, absTol)
+    checkAggregatesWithTol(sparkVariancePop, Row(4.0 / 6.0), absTol)
 
     val sparkVarianceSamp = testData2.agg(var_samp('a))
-    val expectedVarianceSamp = Row(4.0 / 5.0)
-    checkAggregatesWithTol(sparkVarianceSamp, expectedVarianceSamp, absTol)
+    checkAggregatesWithTol(sparkVarianceSamp, Row(4.0 / 5.0), absTol)
 
     val sparkSkewness = testData2.agg(skewness('a))
-    val expectedSkewness = Row(0.0)
-    checkAggregatesWithTol(sparkSkewness, expectedSkewness, absTol)
+    checkAggregatesWithTol(sparkSkewness, Row(0.0), absTol)
 
     val sparkKurtosis = testData2.agg(kurtosis('a))
-    val expectedKurtosis = Row(-1.5)
-    checkAggregatesWithTol(sparkKurtosis, expectedKurtosis, absTol)
-
+    checkAggregatesWithTol(sparkKurtosis, Row(-1.5), absTol)
   }
 
   test("zero moments") {
@@ -251,7 +246,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
 
     checkAnswer(
       emptyTableData.agg(variance('a)),
-      Row(0.0))
+      Row(Double.NaN))
 
     checkAnswer(
       emptyTableData.agg(var_samp('a)),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 6388a8b9c372..5731a356243e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -536,7 +536,7 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     checkAnswer(
       sql("SELECT SKEWNESS(a), KURTOSIS(a), MIN(a), MAX(a)," +
         "AVG(a), VARIANCE(a), STDDEV(a), SUM(a), COUNT(a) FROM nullInts"),
-      Row(0, -1.5, 1, 3, 2, 2.0 / 3.0, 1, 6, 3)
+      Row(0, -1.5, 1, 3, 2, 1.0, 1, 6, 3)
     )
   }
 
@@ -757,7 +757,7 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   test("variance") {
     val absTol = 1e-8
     val sparkAnswer = sql("SELECT VARIANCE(a) FROM testData2")
-    val expectedAnswer = Row(4.0 / 6.0)
+    val expectedAnswer = Row(0.8)
     checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
   }
 
@@ -784,16 +784,16 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
 
   test("stddev agg") {
     checkAnswer(
-        sql("SELECT a, stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2 GROUP BY a"),
+      sql("SELECT a, stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2 GROUP BY a"),
       (1 to 3).map(i => Row(i, math.sqrt(1.0 / 2.0), math.sqrt(1.0 / 4.0), math.sqrt(1.0 / 2.0))))
   }
 
   test("variance agg") {
     val absTol = 1e-8
-    val sparkAnswer = sql("SELECT a, variance(b), var_samp(b), var_pop(b)" +
-      "FROM testData2 GROUP BY a")
-    val expectedAnswer = (1 to 3).map(i => Row(i, 1.0 / 4.0, 1.0 / 2.0, 1.0 / 4.0))
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
+    checkAggregatesWithTol(
+      sql("SELECT a, variance(b), var_samp(b), var_pop(b) FROM testData2 GROUP BY a"),
+      (1 to 3).map(i => Row(i, 1.0 / 2.0, 1.0 / 2.0, 1.0 / 4.0)),
+      absTol)
   }
 
   test("skewness and kurtosis agg") {

From 987df4bfcafeca3633453c2d2f8e14d221fcef33 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 10:04:51 -0800
Subject: [PATCH 491/896] Closes #9464


From de289bf279e14e47859b5fbcd70e97b9d0759f14 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Wed, 4 Nov 2015 10:56:32 -0800
Subject: [PATCH 492/896] [SPARK-10304][SQL] Following up checking valid dir
 structure for partition discovery

This patch follows up #8840.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9459 from viirya/detect_invalid_part_dir_following.
---
 .../datasources/PartitioningUtils.scala          | 14 +++++++++++++-
 .../parquet/ParquetPartitionDiscoverySuite.scala | 16 ++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
index 16dc23661c07..86bc3a1b6dab 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
@@ -81,6 +81,8 @@ private[sql] object PartitioningUtils {
       parsePartition(path, defaultPartitionName, typeInference)
     }.unzip
 
+    // We create pairs of (path -> path's partition value) here
+    // If the corresponding partition value is None, the pair will be skiped
     val pathsWithPartitionValues = paths.zip(partitionValues).flatMap(x => x._2.map(x._1 -> _))
 
     if (pathsWithPartitionValues.isEmpty) {
@@ -89,11 +91,21 @@ private[sql] object PartitioningUtils {
     } else {
       // This dataset is partitioned. We need to check whether all partitions have the same
       // partition columns and resolve potential type conflicts.
+
+      // Check if there is conflicting directory structure.
+      // For the paths such as:
+      // var paths = Seq(
+      //   "hdfs://host:9000/invalidPath",
+      //   "hdfs://host:9000/path/a=10/b=20",
+      //   "hdfs://host:9000/path/a=10.5/b=hello")
+      // It will be recognised as conflicting directory structure:
+      //   "hdfs://host:9000/invalidPath"
+      //   "hdfs://host:9000/path"
       val basePaths = optBasePaths.flatMap(x => x)
       assert(
         basePaths.distinct.size == 1,
         "Conflicting directory structures detected. Suspicious paths:\b" +
-          basePaths.mkString("\n\t", "\n\t", "\n\n"))
+          basePaths.distinct.mkString("\n\t", "\n\t", "\n\n"))
 
       val resolvedPartitionValues = resolvePartitions(pathsWithPartitionValues)
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
index 67b6a37fa502..61cc0da50865 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
@@ -88,6 +88,22 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
     }
     assert(exception.getMessage().contains("Conflicting directory structures detected"))
+
+    // Invalid
+    // Conflicting directory structure:
+    // "hdfs://host:9000/tmp/tables/partitionedTable"
+    // "hdfs://host:9000/tmp/tables/nonPartitionedTable1"
+    // "hdfs://host:9000/tmp/tables/nonPartitionedTable2"
+    paths = Seq(
+      "hdfs://host:9000/tmp/tables/partitionedTable",
+      "hdfs://host:9000/tmp/tables/partitionedTable/p=1/",
+      "hdfs://host:9000/tmp/tables/nonPartitionedTable1",
+      "hdfs://host:9000/tmp/tables/nonPartitionedTable2")
+
+    exception = intercept[AssertionError] {
+      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+    }
+    assert(exception.getMessage().contains("Conflicting directory structures detected"))
   }
 
   test("parse partition") {

From abf5e4285d97b148a32cf22f5287511198175cb6 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 12:33:47 -0800
Subject: [PATCH 493/896] [SPARK-11504][SQL] API audit for distributeBy and
 localSort

1. Renamed localSort -> sortWithinPartitions to avoid ambiguity in "local"
2. distributeBy -> repartition to match the existing repartition.

Author: Reynold Xin <rxin@databricks.com>

Closes #9470 from rxin/SPARK-11504.
---
 .../org/apache/spark/sql/DataFrame.scala      | 132 ++++++++++--------
 .../apache/spark/sql/CachedTableSuite.scala   |  20 ++-
 .../org/apache/spark/sql/DataFrameSuite.scala |  44 +++---
 3 files changed, 113 insertions(+), 83 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 5e9c7efbbf16..d3a2249d7006 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -241,18 +241,6 @@ class DataFrame private[sql](
     sb.toString()
   }
 
-  private[sql] def sortInternal(global: Boolean, sortExprs: Seq[Column]): DataFrame = {
-    val sortOrder: Seq[SortOrder] = sortExprs.map { col =>
-      col.expr match {
-        case expr: SortOrder =>
-          expr
-        case expr: Expression =>
-          SortOrder(expr, Ascending)
-      }
-    }
-    Sort(sortOrder, global = global, logicalPlan)
-  }
-
   override def toString: String = {
     try {
       schema.map(f => s"${f.name}: ${f.dataType.simpleString}").mkString("[", ", ", "]")
@@ -619,6 +607,32 @@ class DataFrame private[sql](
     plan.copy(condition = cond)
   }
 
+  /**
+   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
+   *
+   * This is the same operation as "SORT BY" in SQL (Hive QL).
+   *
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def sortWithinPartitions(sortCol: String, sortCols: String*): DataFrame = {
+    sortWithinPartitions(sortCol, sortCols : _*)
+  }
+
+  /**
+   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
+   *
+   * This is the same operation as "SORT BY" in SQL (Hive QL).
+   *
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def sortWithinPartitions(sortExprs: Column*): DataFrame = {
+    sortInternal(global = false, sortExprs)
+  }
+
   /**
    * Returns a new [[DataFrame]] sorted by the specified column, all in ascending order.
    * {{{
@@ -645,7 +659,7 @@ class DataFrame private[sql](
    */
   @scala.annotation.varargs
   def sort(sortExprs: Column*): DataFrame = {
-    sortInternal(true, sortExprs)
+    sortInternal(global = true, sortExprs)
   }
 
   /**
@@ -666,44 +680,6 @@ class DataFrame private[sql](
   @scala.annotation.varargs
   def orderBy(sortExprs: Column*): DataFrame = sort(sortExprs : _*)
 
-  /**
-   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions into
-   * `numPartitions`. The resulting DataFrame is hash partitioned.
-   * @group dfops
-   * @since 1.6.0
-   */
-  def distributeBy(partitionExprs: Seq[Column], numPartitions: Int): DataFrame = {
-    RepartitionByExpression(partitionExprs.map { _.expr }, logicalPlan, Some(numPartitions))
-  }
-
-  /**
-   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions preserving
-   * the existing number of partitions. The resulting DataFrame is hash partitioned.
-   * @group dfops
-   * @since 1.6.0
-   */
-  def distributeBy(partitionExprs: Seq[Column]): DataFrame = {
-    RepartitionByExpression(partitionExprs.map { _.expr }, logicalPlan, None)
-  }
-
-  /**
-   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
-   * @group dfops
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def localSort(sortCol: String, sortCols: String*): DataFrame = localSort(sortCol, sortCols : _*)
-
-  /**
-   * Returns a new [[DataFrame]] with each partition sorted by the given expressions.
-   * @group dfops
-   * @since 1.6.0
-   */
-  @scala.annotation.varargs
-  def localSort(sortExprs: Column*): DataFrame = {
-    sortInternal(false, sortExprs)
-  }
-
   /**
    * Selects column based on the column name and return it as a [[Column]].
    * Note that the column name can also reference to a nested column like `a.b`.
@@ -798,7 +774,9 @@ class DataFrame private[sql](
    * SQL expressions.
    *
    * {{{
+   *   // The following are equivalent:
    *   df.selectExpr("colA", "colB as newName", "abs(colC)")
+   *   df.select(expr("colA"), expr("colB as newName"), expr("abs(colC)"))
    * }}}
    * @group dfops
    * @since 1.3.0
@@ -1524,13 +1502,41 @@ class DataFrame private[sql](
 
   /**
    * Returns a new [[DataFrame]] that has exactly `numPartitions` partitions.
-   * @group rdd
+   * @group dfops
    * @since 1.3.0
    */
   def repartition(numPartitions: Int): DataFrame = {
     Repartition(numPartitions, shuffle = true, logicalPlan)
   }
 
+  /**
+   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions into
+   * `numPartitions`. The resulting DataFrame is hash partitioned.
+   *
+   * This is the same operation as "DISTRIBUTE BY" in SQL (Hive QL).
+   *
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def repartition(numPartitions: Int, partitionExprs: Column*): DataFrame = {
+    RepartitionByExpression(partitionExprs.map(_.expr), logicalPlan, Some(numPartitions))
+  }
+
+  /**
+   * Returns a new [[DataFrame]] partitioned by the given partitioning expressions preserving
+   * the existing number of partitions. The resulting DataFrame is hash partitioned.
+   *
+   * This is the same operation as "DISTRIBUTE BY" in SQL (Hive QL).
+   *
+   * @group dfops
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def repartition(partitionExprs: Column*): DataFrame = {
+    RepartitionByExpression(partitionExprs.map(_.expr), logicalPlan, numPartitions = None)
+  }
+
   /**
    * Returns a new [[DataFrame]] that has exactly `numPartitions` partitions.
    * Similar to coalesce defined on an [[RDD]], this operation results in a narrow dependency, e.g.
@@ -2016,6 +2022,12 @@ class DataFrame private[sql](
     write.mode(SaveMode.Append).insertInto(tableName)
   }
 
+  ////////////////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////
+  // End of deprecated methods
+  ////////////////////////////////////////////////////////////////////////////
+  ////////////////////////////////////////////////////////////////////////////
+
   /**
    * Wrap a DataFrame action to track all Spark jobs in the body so that we can connect them with
    * an execution.
@@ -2045,10 +2057,16 @@ class DataFrame private[sql](
     }
   }
 
-  ////////////////////////////////////////////////////////////////////////////
-  ////////////////////////////////////////////////////////////////////////////
-  // End of deprecated methods
-  ////////////////////////////////////////////////////////////////////////////
-  ////////////////////////////////////////////////////////////////////////////
+  private def sortInternal(global: Boolean, sortExprs: Seq[Column]): DataFrame = {
+    val sortOrder: Seq[SortOrder] = sortExprs.map { col =>
+      col.expr match {
+        case expr: SortOrder =>
+          expr
+        case expr: Expression =>
+          SortOrder(expr, Ascending)
+      }
+    }
+    Sort(sortOrder, global = global, logicalPlan)
+  }
 
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
index 605954b105d1..dbcb011f603f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
@@ -379,8 +379,8 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
     // Set up two tables distributed in the same way. Try this with the data distributed into
     // different number of partitions.
     for (numPartitions <- 1 until 10 by 4) {
-      testData.distributeBy(Column("key") :: Nil, numPartitions).registerTempTable("t1")
-      testData2.distributeBy(Column("a") :: Nil, numPartitions).registerTempTable("t2")
+      testData.repartition(numPartitions, $"key").registerTempTable("t1")
+      testData2.repartition(numPartitions, $"a").registerTempTable("t2")
       sqlContext.cacheTable("t1")
       sqlContext.cacheTable("t2")
 
@@ -401,8 +401,20 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
     }
 
     // Distribute the tables into non-matching number of partitions. Need to shuffle.
-    testData.distributeBy(Column("key") :: Nil, 6).registerTempTable("t1")
-    testData2.distributeBy(Column("a") :: Nil, 3).registerTempTable("t2")
+    testData.repartition(6, $"key").registerTempTable("t1")
+    testData2.repartition(3, $"a").registerTempTable("t2")
+    sqlContext.cacheTable("t1")
+    sqlContext.cacheTable("t2")
+
+    verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 2)
+    sqlContext.uncacheTable("t1")
+    sqlContext.uncacheTable("t2")
+    sqlContext.dropTempTable("t1")
+    sqlContext.dropTempTable("t2")
+
+    // One side of join is not partitioned in the desired way. Need to shuffle.
+    testData.repartition(6, $"value").registerTempTable("t1")
+    testData2.repartition(6, $"a").registerTempTable("t2")
     sqlContext.cacheTable("t1")
     sqlContext.cacheTable("t2")
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index a9e641342311..84a616d0b908 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -1044,79 +1044,79 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
   test("distributeBy and localSort") {
     val original = testData.repartition(1)
     assert(original.rdd.partitions.length == 1)
-    val df = original.distributeBy(Column("key") :: Nil, 5)
-    assert(df.rdd.partitions.length  == 5)
+    val df = original.repartition(5, $"key")
+    assert(df.rdd.partitions.length == 5)
     checkAnswer(original.select(), df.select())
 
-    val df2 = original.distributeBy(Column("key") :: Nil, 10)
-    assert(df2.rdd.partitions.length  == 10)
+    val df2 = original.repartition(10, $"key")
+    assert(df2.rdd.partitions.length == 10)
     checkAnswer(original.select(), df2.select())
 
     // Group by the column we are distributed by. This should generate a plan with no exchange
     // between the aggregates
-    val df3 = testData.distributeBy(Column("key") :: Nil).groupBy("key").count()
+    val df3 = testData.repartition($"key").groupBy("key").count()
     verifyNonExchangingAgg(df3)
-    verifyNonExchangingAgg(testData.distributeBy(Column("key") :: Column("value") :: Nil)
+    verifyNonExchangingAgg(testData.repartition($"key", $"value")
       .groupBy("key", "value").count())
 
     // Grouping by just the first distributeBy expr, need to exchange.
-    verifyExchangingAgg(testData.distributeBy(Column("key") :: Column("value") :: Nil)
+    verifyExchangingAgg(testData.repartition($"key", $"value")
       .groupBy("key").count())
 
     val data = sqlContext.sparkContext.parallelize(
       (1 to 100).map(i => TestData2(i % 10, i))).toDF()
 
     // Distribute and order by.
-    val df4 = data.distributeBy(Column("a") :: Nil).localSort($"b".desc)
+    val df4 = data.repartition($"a").sortWithinPartitions($"b".desc)
     // Walk each partition and verify that it is sorted descending and does not contain all
     // the values.
-    df4.rdd.foreachPartition(p => {
+    df4.rdd.foreachPartition { p =>
       var previousValue: Int = -1
       var allSequential: Boolean = true
-      p.foreach(r => {
+      p.foreach { r =>
         val v: Int = r.getInt(1)
         if (previousValue != -1) {
           if (previousValue < v) throw new SparkException("Partition is not ordered.")
           if (v + 1 != previousValue) allSequential = false
         }
         previousValue = v
-      })
+      }
       if (allSequential) throw new SparkException("Partition should not be globally ordered")
-    })
+    }
 
     // Distribute and order by with multiple order bys
-    val df5 = data.distributeBy(Column("a") :: Nil, 2).localSort($"b".asc, $"a".asc)
+    val df5 = data.repartition(2, $"a").sortWithinPartitions($"b".asc, $"a".asc)
     // Walk each partition and verify that it is sorted ascending
-    df5.rdd.foreachPartition(p => {
+    df5.rdd.foreachPartition { p =>
       var previousValue: Int = -1
       var allSequential: Boolean = true
-      p.foreach(r => {
+      p.foreach { r =>
         val v: Int = r.getInt(1)
         if (previousValue != -1) {
           if (previousValue > v) throw new SparkException("Partition is not ordered.")
           if (v - 1 != previousValue) allSequential = false
         }
         previousValue = v
-      })
+      }
       if (allSequential) throw new SparkException("Partition should not be all sequential")
-    })
+    }
 
     // Distribute into one partition and order by. This partition should contain all the values.
-    val df6 = data.distributeBy(Column("a") :: Nil, 1).localSort($"b".asc)
+    val df6 = data.repartition(1, $"a").sortWithinPartitions($"b".asc)
     // Walk each partition and verify that it is sorted descending and not globally sorted.
-    df6.rdd.foreachPartition(p => {
+    df6.rdd.foreachPartition { p =>
       var previousValue: Int = -1
       var allSequential: Boolean = true
-      p.foreach(r => {
+      p.foreach { r =>
         val v: Int = r.getInt(1)
         if (previousValue != -1) {
           if (previousValue > v) throw new SparkException("Partition is not ordered.")
           if (v - 1 != previousValue) allSequential = false
         }
         previousValue = v
-      })
+      }
       if (!allSequential) throw new SparkException("Partition should contain all sequential values")
-    })
+    }
   }
 
   test("fix case sensitivity of partition by") {

From d19f4fda63d0800a85b3e1c8379160bbbf17b6a3 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 13:44:07 -0800
Subject: [PATCH 494/896] [SPARK-11505][SQL] Break aggregate functions into
 multiple files

functions.scala was getting pretty long. I broke it into multiple files.

I also added explicit data types for some public vals, and renamed aggregate function pretty names to lower case, which is more consistent with rest of the functions.

Author: Reynold Xin <rxin@databricks.com>

Closes #9471 from rxin/SPARK-11505.
---
 .../unsafe/sort/UnsafeExternalSorter.java     |   5 +-
 .../expressions/aggregate/Average.scala       |  86 ++
 .../aggregate/CentralMomentAgg.scala          | 230 +++++
 .../catalyst/expressions/aggregate/Corr.scala | 179 ++++
 .../expressions/aggregate/Count.scala         |  52 +
 .../expressions/aggregate/First.scala         |  92 ++
 ...ctions.scala => HyperLogLogPlusPlus.scala} | 933 ------------------
 .../expressions/aggregate/Kurtosis.scala      |  49 +
 .../catalyst/expressions/aggregate/Last.scala |  89 ++
 .../catalyst/expressions/aggregate/Max.scala  |  55 ++
 .../catalyst/expressions/aggregate/Min.scala  |  56 ++
 .../expressions/aggregate/Skewness.scala      |  48 +
 .../expressions/aggregate/Stddev.scala        | 134 +++
 .../catalyst/expressions/aggregate/Sum.scala  |  75 ++
 .../aggregate/{utils.scala => Utils.scala}    |   0
 .../expressions/aggregate/Variance.scala      |  66 ++
 .../sql/catalyst/expressions/aggregates.scala |  24 +-
 17 files changed, 1223 insertions(+), 950 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/{functions.scala => HyperLogLogPlusPlus.scala} (72%)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/{utils.scala => Utils.scala} (100%)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index 49a5a4b13b70..509fb0a044c0 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -157,11 +157,14 @@ public void closeCurrentPage() {
    */
   @Override
   public long spill(long size, MemoryConsumer trigger) throws IOException {
+    assert(inMemSorter != null);
     if (trigger != this) {
       if (readingIterator != null) {
         return readingIterator.spill();
+      } else {
+
       }
-      return 0L;
+      return 0L; // this should throw exception
     }
 
     if (inMemSorter == null || inMemSorter.numRecords() <= 0) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
new file mode 100644
index 000000000000..c8c20ada5fbc
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
@@ -0,0 +1,86 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+case class Average(child: Expression) extends DeclarativeAggregate {
+
+  override def prettyName: String = "avg"
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // Return data type.
+  override def dataType: DataType = resultType
+
+  // Expected input data type.
+  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
+  // new version at planning time (after analysis phase). For now, NullType is added at here
+  // to make it resolved when we have cases like `select avg(null)`.
+  // We can use our analyzer to cast NullType to the default data type of the NumericType once
+  // we remove the old aggregate functions. Then, we will not need NullType at here.
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+
+  private val resultType = child.dataType match {
+    case DecimalType.Fixed(p, s) =>
+      DecimalType.bounded(p + 4, s + 4)
+    case _ => DoubleType
+  }
+
+  private val sumDataType = child.dataType match {
+    case _ @ DecimalType.Fixed(p, s) => DecimalType.bounded(p + 10, s)
+    case _ => DoubleType
+  }
+
+  private val sum = AttributeReference("sum", sumDataType)()
+  private val count = AttributeReference("count", LongType)()
+
+  override val aggBufferAttributes = sum :: count :: Nil
+
+  override val initialValues = Seq(
+    /* sum = */ Cast(Literal(0), sumDataType),
+    /* count = */ Literal(0L)
+  )
+
+  override val updateExpressions = Seq(
+    /* sum = */
+    Add(
+      sum,
+      Coalesce(Cast(child, sumDataType) :: Cast(Literal(0), sumDataType) :: Nil)),
+    /* count = */ If(IsNull(child), count, count + 1L)
+  )
+
+  override val mergeExpressions = Seq(
+    /* sum = */ sum.left + sum.right,
+    /* count = */ count.left + count.right
+  )
+
+  // If all input are nulls, count will be 0 and we will get null after the division.
+  override val evaluateExpression = child.dataType match {
+    case DecimalType.Fixed(p, s) =>
+      // increase the precision and scale to prevent precision loss
+      val dt = DecimalType.bounded(p + 14, s + 4)
+      Cast(Cast(sum, dt) / Cast(count, dt), resultType)
+    case _ =>
+      Cast(sum, resultType) / Cast(count, resultType)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
new file mode 100644
index 000000000000..ef08b025ff55
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
@@ -0,0 +1,230 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+/**
+ * A central moment is the expected value of a specified power of the deviation of a random
+ * variable from the mean. Central moments are often used to characterize the properties of about
+ * the shape of a distribution.
+ *
+ * This class implements online, one-pass algorithms for computing the central moments of a set of
+ * points.
+ *
+ * Behavior:
+ *  - null values are ignored
+ *  - returns `Double.NaN` when the column contains `Double.NaN` values
+ *
+ * References:
+ *  - Xiangrui Meng.  "Simpler Online Updates for Arbitrary-Order Central Moments."
+ *      2015. http://arxiv.org/abs/1510.04923
+ *
+ * @see [[https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+ *     Algorithms for calculating variance (Wikipedia)]]
+ *
+ * @param child to compute central moments of.
+ */
+abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate with Serializable {
+
+  /**
+   * The central moment order to be computed.
+   */
+  protected def momentOrder: Int
+
+  override def children: Seq[Expression] = Seq(child)
+
+  override def nullable: Boolean = false
+
+  override def dataType: DataType = DoubleType
+
+  // Expected input data type.
+  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
+  // new version at planning time (after analysis phase). For now, NullType is added at here
+  // to make it resolved when we have cases like `select avg(null)`.
+  // We can use our analyzer to cast NullType to the default data type of the NumericType once
+  // we remove the old aggregate functions. Then, we will not need NullType at here.
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+
+  override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
+
+  /**
+   * Size of aggregation buffer.
+   */
+  private[this] val bufferSize = 5
+
+  override val aggBufferAttributes: Seq[AttributeReference] = Seq.tabulate(bufferSize) { i =>
+    AttributeReference(s"M$i", DoubleType)()
+  }
+
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
+
+  // buffer offsets
+  private[this] val nOffset = mutableAggBufferOffset
+  private[this] val meanOffset = mutableAggBufferOffset + 1
+  private[this] val secondMomentOffset = mutableAggBufferOffset + 2
+  private[this] val thirdMomentOffset = mutableAggBufferOffset + 3
+  private[this] val fourthMomentOffset = mutableAggBufferOffset + 4
+
+  // frequently used values for online updates
+  private[this] var delta = 0.0
+  private[this] var deltaN = 0.0
+  private[this] var delta2 = 0.0
+  private[this] var deltaN2 = 0.0
+  private[this] var n = 0.0
+  private[this] var mean = 0.0
+  private[this] var m2 = 0.0
+  private[this] var m3 = 0.0
+  private[this] var m4 = 0.0
+
+  /**
+   * Initialize all moments to zero.
+   */
+  override def initialize(buffer: MutableRow): Unit = {
+    for (aggIndex <- 0 until bufferSize) {
+      buffer.setDouble(mutableAggBufferOffset + aggIndex, 0.0)
+    }
+  }
+
+  /**
+   * Update the central moments buffer.
+   */
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val v = Cast(child, DoubleType).eval(input)
+    if (v != null) {
+      val updateValue = v match {
+        case d: Double => d
+      }
+
+      n = buffer.getDouble(nOffset)
+      mean = buffer.getDouble(meanOffset)
+
+      n += 1.0
+      buffer.setDouble(nOffset, n)
+      delta = updateValue - mean
+      deltaN = delta / n
+      mean += deltaN
+      buffer.setDouble(meanOffset, mean)
+
+      if (momentOrder >= 2) {
+        m2 = buffer.getDouble(secondMomentOffset)
+        m2 += delta * (delta - deltaN)
+        buffer.setDouble(secondMomentOffset, m2)
+      }
+
+      if (momentOrder >= 3) {
+        delta2 = delta * delta
+        deltaN2 = deltaN * deltaN
+        m3 = buffer.getDouble(thirdMomentOffset)
+        m3 += -3.0 * deltaN * m2 + delta * (delta2 - deltaN2)
+        buffer.setDouble(thirdMomentOffset, m3)
+      }
+
+      if (momentOrder >= 4) {
+        m4 = buffer.getDouble(fourthMomentOffset)
+        m4 += -4.0 * deltaN * m3 - 6.0 * deltaN2 * m2 +
+          delta * (delta * delta2 - deltaN * deltaN2)
+        buffer.setDouble(fourthMomentOffset, m4)
+      }
+    }
+  }
+
+  /**
+   * Merge two central moment buffers.
+   */
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    val n1 = buffer1.getDouble(nOffset)
+    val n2 = buffer2.getDouble(inputAggBufferOffset)
+    val mean1 = buffer1.getDouble(meanOffset)
+    val mean2 = buffer2.getDouble(inputAggBufferOffset + 1)
+
+    var secondMoment1 = 0.0
+    var secondMoment2 = 0.0
+
+    var thirdMoment1 = 0.0
+    var thirdMoment2 = 0.0
+
+    var fourthMoment1 = 0.0
+    var fourthMoment2 = 0.0
+
+    n = n1 + n2
+    buffer1.setDouble(nOffset, n)
+    delta = mean2 - mean1
+    deltaN = if (n == 0.0) 0.0 else delta / n
+    mean = mean1 + deltaN * n2
+    buffer1.setDouble(mutableAggBufferOffset + 1, mean)
+
+    // higher order moments computed according to:
+    // https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Higher-order_statistics
+    if (momentOrder >= 2) {
+      secondMoment1 = buffer1.getDouble(secondMomentOffset)
+      secondMoment2 = buffer2.getDouble(inputAggBufferOffset + 2)
+      m2 = secondMoment1 + secondMoment2 + delta * deltaN * n1 * n2
+      buffer1.setDouble(secondMomentOffset, m2)
+    }
+
+    if (momentOrder >= 3) {
+      thirdMoment1 = buffer1.getDouble(thirdMomentOffset)
+      thirdMoment2 = buffer2.getDouble(inputAggBufferOffset + 3)
+      m3 = thirdMoment1 + thirdMoment2 + deltaN * deltaN * delta * n1 * n2 *
+        (n1 - n2) + 3.0 * deltaN * (n1 * secondMoment2 - n2 * secondMoment1)
+      buffer1.setDouble(thirdMomentOffset, m3)
+    }
+
+    if (momentOrder >= 4) {
+      fourthMoment1 = buffer1.getDouble(fourthMomentOffset)
+      fourthMoment2 = buffer2.getDouble(inputAggBufferOffset + 4)
+      m4 = fourthMoment1 + fourthMoment2 + deltaN * deltaN * deltaN * delta * n1 *
+        n2 * (n1 * n1 - n1 * n2 + n2 * n2) + deltaN * deltaN * 6.0 *
+        (n1 * n1 * secondMoment2 + n2 * n2 * secondMoment1) +
+        4.0 * deltaN * (n1 * thirdMoment2 - n2 * thirdMoment1)
+      buffer1.setDouble(fourthMomentOffset, m4)
+    }
+  }
+
+  /**
+   * Compute aggregate statistic from sufficient moments.
+   * @param centralMoments Length `momentOrder + 1` array of central moments (un-normalized)
+   *                       needed to compute the aggregate stat.
+   */
+  def getStatistic(n: Double, mean: Double, centralMoments: Array[Double]): Double
+
+  override final def eval(buffer: InternalRow): Any = {
+    val n = buffer.getDouble(nOffset)
+    val mean = buffer.getDouble(meanOffset)
+    val moments = Array.ofDim[Double](momentOrder + 1)
+    moments(0) = 1.0
+    moments(1) = 0.0
+    if (momentOrder >= 2) {
+      moments(2) = buffer.getDouble(secondMomentOffset)
+    }
+    if (momentOrder >= 3) {
+      moments(3) = buffer.getDouble(thirdMomentOffset)
+    }
+    if (momentOrder >= 4) {
+      moments(4) = buffer.getDouble(fourthMomentOffset)
+    }
+
+    getStatistic(n, mean, moments)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
new file mode 100644
index 000000000000..832338378fb3
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
@@ -0,0 +1,179 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+/**
+ * Compute Pearson correlation between two expressions.
+ * When applied on empty data (i.e., count is zero), it returns NULL.
+ *
+ * Definition of Pearson correlation can be found at
+ * http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient
+ */
+case class Corr(
+    left: Expression,
+    right: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends ImperativeAggregate {
+
+  override def children: Seq[Expression] = Seq(left, right)
+
+  override def nullable: Boolean = false
+
+  override def dataType: DataType = DoubleType
+
+  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
+
+  override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
+
+  override def inputAggBufferAttributes: Seq[AttributeReference] = {
+    aggBufferAttributes.map(_.newInstance())
+  }
+
+  override val aggBufferAttributes: Seq[AttributeReference] = Seq(
+    AttributeReference("xAvg", DoubleType)(),
+    AttributeReference("yAvg", DoubleType)(),
+    AttributeReference("Ck", DoubleType)(),
+    AttributeReference("MkX", DoubleType)(),
+    AttributeReference("MkY", DoubleType)(),
+    AttributeReference("count", LongType)())
+
+  // Local cache of mutableAggBufferOffset(s) that will be used in update and merge
+  private[this] val mutableAggBufferOffsetPlus1 = mutableAggBufferOffset + 1
+  private[this] val mutableAggBufferOffsetPlus2 = mutableAggBufferOffset + 2
+  private[this] val mutableAggBufferOffsetPlus3 = mutableAggBufferOffset + 3
+  private[this] val mutableAggBufferOffsetPlus4 = mutableAggBufferOffset + 4
+  private[this] val mutableAggBufferOffsetPlus5 = mutableAggBufferOffset + 5
+
+  // Local cache of inputAggBufferOffset(s) that will be used in update and merge
+  private[this] val inputAggBufferOffsetPlus1 = inputAggBufferOffset + 1
+  private[this] val inputAggBufferOffsetPlus2 = inputAggBufferOffset + 2
+  private[this] val inputAggBufferOffsetPlus3 = inputAggBufferOffset + 3
+  private[this] val inputAggBufferOffsetPlus4 = inputAggBufferOffset + 4
+  private[this] val inputAggBufferOffsetPlus5 = inputAggBufferOffset + 5
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def initialize(buffer: MutableRow): Unit = {
+    buffer.setDouble(mutableAggBufferOffset, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus1, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus2, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus3, 0.0)
+    buffer.setDouble(mutableAggBufferOffsetPlus4, 0.0)
+    buffer.setLong(mutableAggBufferOffsetPlus5, 0L)
+  }
+
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val leftEval = left.eval(input)
+    val rightEval = right.eval(input)
+
+    if (leftEval != null && rightEval != null) {
+      val x = leftEval.asInstanceOf[Double]
+      val y = rightEval.asInstanceOf[Double]
+
+      var xAvg = buffer.getDouble(mutableAggBufferOffset)
+      var yAvg = buffer.getDouble(mutableAggBufferOffsetPlus1)
+      var Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
+      var MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
+      var MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
+      var count = buffer.getLong(mutableAggBufferOffsetPlus5)
+
+      val deltaX = x - xAvg
+      val deltaY = y - yAvg
+      count += 1
+      xAvg += deltaX / count
+      yAvg += deltaY / count
+      Ck += deltaX * (y - yAvg)
+      MkX += deltaX * (x - xAvg)
+      MkY += deltaY * (y - yAvg)
+
+      buffer.setDouble(mutableAggBufferOffset, xAvg)
+      buffer.setDouble(mutableAggBufferOffsetPlus1, yAvg)
+      buffer.setDouble(mutableAggBufferOffsetPlus2, Ck)
+      buffer.setDouble(mutableAggBufferOffsetPlus3, MkX)
+      buffer.setDouble(mutableAggBufferOffsetPlus4, MkY)
+      buffer.setLong(mutableAggBufferOffsetPlus5, count)
+    }
+  }
+
+  // Merge counters from other partitions. Formula can be found at:
+  // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    val count2 = buffer2.getLong(inputAggBufferOffsetPlus5)
+
+    // We only go to merge two buffers if there is at least one record aggregated in buffer2.
+    // We don't need to check count in buffer1 because if count2 is more than zero, totalCount
+    // is more than zero too, then we won't get a divide by zero exception.
+    if (count2 > 0) {
+      var xAvg = buffer1.getDouble(mutableAggBufferOffset)
+      var yAvg = buffer1.getDouble(mutableAggBufferOffsetPlus1)
+      var Ck = buffer1.getDouble(mutableAggBufferOffsetPlus2)
+      var MkX = buffer1.getDouble(mutableAggBufferOffsetPlus3)
+      var MkY = buffer1.getDouble(mutableAggBufferOffsetPlus4)
+      var count = buffer1.getLong(mutableAggBufferOffsetPlus5)
+
+      val xAvg2 = buffer2.getDouble(inputAggBufferOffset)
+      val yAvg2 = buffer2.getDouble(inputAggBufferOffsetPlus1)
+      val Ck2 = buffer2.getDouble(inputAggBufferOffsetPlus2)
+      val MkX2 = buffer2.getDouble(inputAggBufferOffsetPlus3)
+      val MkY2 = buffer2.getDouble(inputAggBufferOffsetPlus4)
+
+      val totalCount = count + count2
+      val deltaX = xAvg - xAvg2
+      val deltaY = yAvg - yAvg2
+      Ck += Ck2 + deltaX * deltaY * count / totalCount * count2
+      xAvg = (xAvg * count + xAvg2 * count2) / totalCount
+      yAvg = (yAvg * count + yAvg2 * count2) / totalCount
+      MkX += MkX2 + deltaX * deltaX * count / totalCount * count2
+      MkY += MkY2 + deltaY * deltaY * count / totalCount * count2
+      count = totalCount
+
+      buffer1.setDouble(mutableAggBufferOffset, xAvg)
+      buffer1.setDouble(mutableAggBufferOffsetPlus1, yAvg)
+      buffer1.setDouble(mutableAggBufferOffsetPlus2, Ck)
+      buffer1.setDouble(mutableAggBufferOffsetPlus3, MkX)
+      buffer1.setDouble(mutableAggBufferOffsetPlus4, MkY)
+      buffer1.setLong(mutableAggBufferOffsetPlus5, count)
+    }
+  }
+
+  override def eval(buffer: InternalRow): Any = {
+    val count = buffer.getLong(mutableAggBufferOffsetPlus5)
+    if (count > 0) {
+      val Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
+      val MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
+      val MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
+      val corr = Ck / math.sqrt(MkX * MkY)
+      if (corr.isNaN) {
+        null
+      } else {
+        corr
+      }
+    } else {
+      null
+    }
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
new file mode 100644
index 000000000000..54df96cd2446
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
@@ -0,0 +1,52 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+case class Count(child: Expression) extends DeclarativeAggregate {
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = false
+
+  // Return data type.
+  override def dataType: DataType = LongType
+
+  // Expected input data type.
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  private val count = AttributeReference("count", LongType)()
+
+  override val aggBufferAttributes = count :: Nil
+
+  override val initialValues = Seq(
+    /* count = */ Literal(0L)
+  )
+
+  override val updateExpressions = Seq(
+    /* count = */ If(IsNull(child), count, count + 1L)
+  )
+
+  override val mergeExpressions = Seq(
+    /* count = */ count.left + count.right
+  )
+
+  override val evaluateExpression = Cast(count, LongType)
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
new file mode 100644
index 000000000000..902814301585
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
@@ -0,0 +1,92 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.AnalysisException
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+/**
+ * Returns the first value of `child` for a group of rows. If the first value of `child`
+ * is `null`, it returns `null` (respecting nulls). Even if [[First]] is used on a already
+ * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
+ * is used) its result will not be deterministic (unless the input table is sorted and has
+ * a single partition, and we use a single reducer to do the aggregation.).
+ */
+case class First(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // First is not a deterministic function.
+  override def deterministic: Boolean = false
+
+  // Return data type.
+  override def dataType: DataType = child.dataType
+
+  // Expected input data type.
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  private val first = AttributeReference("first", child.dataType)()
+
+  private val valueSet = AttributeReference("valueSet", BooleanType)()
+
+  override val aggBufferAttributes: Seq[AttributeReference] = first :: valueSet :: Nil
+
+  override val initialValues: Seq[Literal] = Seq(
+    /* first = */ Literal.create(null, child.dataType),
+    /* valueSet = */ Literal.create(false, BooleanType)
+  )
+
+  override val updateExpressions: Seq[Expression] = {
+    if (ignoreNulls) {
+      Seq(
+        /* first = */ If(Or(valueSet, IsNull(child)), first, child),
+        /* valueSet = */ Or(valueSet, IsNotNull(child))
+      )
+    } else {
+      Seq(
+        /* first = */ If(valueSet, first, child),
+        /* valueSet = */ Literal.create(true, BooleanType)
+      )
+    }
+  }
+
+  override val mergeExpressions: Seq[Expression] = {
+    // For first, we can just check if valueSet.left is set to true. If it is set
+    // to true, we use first.right. If not, we use first.right (even if valueSet.right is
+    // false, we are safe to do so because first.right will be null in this case).
+    Seq(
+      /* first = */ If(valueSet.left, first.left, first.right),
+      /* valueSet = */ Or(valueSet.left, valueSet.right)
+    )
+  }
+
+  override val evaluateExpression: AttributeReference = first
+
+  override def toString: String = s"first($child)${if (ignoreNulls) " ignore nulls"}"
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
similarity index 72%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
index 10dc5e64b7ec..8d341ee630bd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/functions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
@@ -22,636 +22,10 @@ import java.util
 
 import com.clearspring.analytics.hash.MurmurHash
 
-import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst._
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
 
-case class Average(child: Expression) extends DeclarativeAggregate {
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // Return data type.
-  override def dataType: DataType = resultType
-
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select avg(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
-
-  private val resultType = child.dataType match {
-    case DecimalType.Fixed(p, s) =>
-      DecimalType.bounded(p + 4, s + 4)
-    case _ => DoubleType
-  }
-
-  private val sumDataType = child.dataType match {
-    case _ @ DecimalType.Fixed(p, s) => DecimalType.bounded(p + 10, s)
-    case _ => DoubleType
-  }
-
-  private val sum = AttributeReference("sum", sumDataType)()
-  private val count = AttributeReference("count", LongType)()
-
-  override val aggBufferAttributes = sum :: count :: Nil
-
-  override val initialValues = Seq(
-    /* sum = */ Cast(Literal(0), sumDataType),
-    /* count = */ Literal(0L)
-  )
-
-  override val updateExpressions = Seq(
-    /* sum = */
-    Add(
-      sum,
-      Coalesce(Cast(child, sumDataType) :: Cast(Literal(0), sumDataType) :: Nil)),
-    /* count = */ If(IsNull(child), count, count + 1L)
-  )
-
-  override val mergeExpressions = Seq(
-    /* sum = */ sum.left + sum.right,
-    /* count = */ count.left + count.right
-  )
-
-  // If all input are nulls, count will be 0 and we will get null after the division.
-  override val evaluateExpression = child.dataType match {
-    case DecimalType.Fixed(p, s) =>
-      // increase the precision and scale to prevent precision loss
-      val dt = DecimalType.bounded(p + 14, s + 4)
-      Cast(Cast(sum, dt) / Cast(count, dt), resultType)
-    case _ =>
-      Cast(sum, resultType) / Cast(count, resultType)
-  }
-}
-
-case class Count(child: Expression) extends DeclarativeAggregate {
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = false
-
-  // Return data type.
-  override def dataType: DataType = LongType
-
-  // Expected input data type.
-  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
-
-  private val count = AttributeReference("count", LongType)()
-
-  override val aggBufferAttributes = count :: Nil
-
-  override val initialValues = Seq(
-    /* count = */ Literal(0L)
-  )
-
-  override val updateExpressions = Seq(
-    /* count = */ If(IsNull(child), count, count + 1L)
-  )
-
-  override val mergeExpressions = Seq(
-    /* count = */ count.left + count.right
-  )
-
-  override val evaluateExpression = Cast(count, LongType)
-}
-
-/**
- * Returns the first value of `child` for a group of rows. If the first value of `child`
- * is `null`, it returns `null` (respecting nulls). Even if [[First]] is used on a already
- * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
- * is used) its result will not be deterministic (unless the input table is sorted and has
- * a single partition, and we use a single reducer to do the aggregation.).
- * @param child
- */
-case class First(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
-
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
-  private val ignoreNulls: Boolean = ignoreNullsExpr match {
-    case Literal(b: Boolean, BooleanType) => b
-    case _ =>
-      throw new AnalysisException("The second argument of First should be a boolean literal.")
-  }
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // First is not a deterministic function.
-  override def deterministic: Boolean = false
-
-  // Return data type.
-  override def dataType: DataType = child.dataType
-
-  // Expected input data type.
-  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
-
-  private val first = AttributeReference("first", child.dataType)()
-
-  private val valueSet = AttributeReference("valueSet", BooleanType)()
-
-  override val aggBufferAttributes = first :: valueSet :: Nil
-
-  override val initialValues = Seq(
-    /* first = */ Literal.create(null, child.dataType),
-    /* valueSet = */ Literal.create(false, BooleanType)
-  )
-
-  override val updateExpressions = {
-    if (ignoreNulls) {
-      Seq(
-        /* first = */ If(Or(valueSet, IsNull(child)), first, child),
-        /* valueSet = */ Or(valueSet, IsNotNull(child))
-      )
-    } else {
-      Seq(
-        /* first = */ If(valueSet, first, child),
-        /* valueSet = */ Literal.create(true, BooleanType)
-      )
-    }
-  }
-
-  override val mergeExpressions = {
-    // For first, we can just check if valueSet.left is set to true. If it is set
-    // to true, we use first.right. If not, we use first.right (even if valueSet.right is
-    // false, we are safe to do so because first.right will be null in this case).
-    Seq(
-      /* first = */ If(valueSet.left, first.left, first.right),
-      /* valueSet = */ Or(valueSet.left, valueSet.right)
-    )
-  }
-
-  override val evaluateExpression = first
-
-  override def toString: String = s"FIRST($child)${if (ignoreNulls) " IGNORE NULLS"}"
-}
-
-/**
- * Returns the last value of `child` for a group of rows. If the last value of `child`
- * is `null`, it returns `null` (respecting nulls). Even if [[Last]] is used on a already
- * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
- * is used) its result will not be deterministic (unless the input table is sorted and has
- * a single partition, and we use a single reducer to do the aggregation.).
- * @param child
- */
-case class Last(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
-
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
-  private val ignoreNulls: Boolean = ignoreNullsExpr match {
-    case Literal(b: Boolean, BooleanType) => b
-    case _ =>
-      throw new AnalysisException("The second argument of First should be a boolean literal.")
-  }
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // Last is not a deterministic function.
-  override def deterministic: Boolean = false
-
-  // Return data type.
-  override def dataType: DataType = child.dataType
-
-  // Expected input data type.
-  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
-
-  private val last = AttributeReference("last", child.dataType)()
-
-  override val aggBufferAttributes = last :: Nil
-
-  override val initialValues = Seq(
-    /* last = */ Literal.create(null, child.dataType)
-  )
-
-  override val updateExpressions = {
-    if (ignoreNulls) {
-      Seq(
-        /* last = */ If(IsNull(child), last, child)
-      )
-    } else {
-      Seq(
-        /* last = */ child
-      )
-    }
-  }
-
-  override val mergeExpressions = {
-    if (ignoreNulls) {
-      Seq(
-        /* last = */ If(IsNull(last.right), last.left, last.right)
-      )
-    } else {
-      Seq(
-        /* last = */ last.right
-      )
-    }
-  }
-
-  override val evaluateExpression = last
-
-  override def toString: String = s"LAST($child)${if (ignoreNulls) " IGNORE NULLS"}"
-}
-
-case class Max(child: Expression) extends DeclarativeAggregate {
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // Return data type.
-  override def dataType: DataType = child.dataType
-
-  // Expected input data type.
-  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
-
-  private val max = AttributeReference("max", child.dataType)()
-
-  override val aggBufferAttributes = max :: Nil
-
-  override val initialValues = Seq(
-    /* max = */ Literal.create(null, child.dataType)
-  )
-
-  override val updateExpressions = Seq(
-    /* max = */ If(IsNull(child), max, If(IsNull(max), child, Greatest(Seq(max, child))))
-  )
-
-  override val mergeExpressions = {
-    val greatest = Greatest(Seq(max.left, max.right))
-    Seq(
-      /* max = */ If(IsNull(max.right), max.left, If(IsNull(max.left), max.right, greatest))
-    )
-  }
-
-  override val evaluateExpression = max
-}
-
-case class Min(child: Expression) extends DeclarativeAggregate {
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // Return data type.
-  override def dataType: DataType = child.dataType
-
-  // Expected input data type.
-  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
-
-  private val min = AttributeReference("min", child.dataType)()
-
-  override val aggBufferAttributes = min :: Nil
-
-  override val initialValues = Seq(
-    /* min = */ Literal.create(null, child.dataType)
-  )
-
-  override val updateExpressions = Seq(
-    /* min = */ If(IsNull(child), min, If(IsNull(min), child, Least(Seq(min, child))))
-  )
-
-  override val mergeExpressions = {
-    val least = Least(Seq(min.left, min.right))
-    Seq(
-      /* min = */ If(IsNull(min.right), min.left, If(IsNull(min.left), min.right, least))
-    )
-  }
-
-  override val evaluateExpression = min
-}
-
-// Compute the population standard deviation of a column
-case class StddevPop(child: Expression) extends StddevAgg(child) {
-
-  override def isSample: Boolean = false
-  override def prettyName: String = "stddev_pop"
-}
-
-// Compute the sample standard deviation of a column
-case class StddevSamp(child: Expression) extends StddevAgg(child) {
-
-  override def isSample: Boolean = true
-  override def prettyName: String = "stddev_samp"
-}
-
-// Compute standard deviation based on online algorithm specified here:
-// http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  def isSample: Boolean
-
-  // Return data type.
-  override def dataType: DataType = resultType
-
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select stddev(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
-
-  private val resultType = DoubleType
-
-  private val count = AttributeReference("count", resultType)()
-  private val avg = AttributeReference("avg", resultType)()
-  private val mk = AttributeReference("mk", resultType)()
-
-  override val aggBufferAttributes = count :: avg :: mk :: Nil
-
-  override val initialValues = Seq(
-    /* count = */ Cast(Literal(0), resultType),
-    /* avg = */ Cast(Literal(0), resultType),
-    /* mk = */ Cast(Literal(0), resultType)
-  )
-
-  override val updateExpressions = {
-    val value = Cast(child, resultType)
-    val newCount = count + Cast(Literal(1), resultType)
-
-    // update average
-    // avg = avg + (value - avg)/count
-    val newAvg = avg + (value - avg) / newCount
-
-    // update sum of square of difference from mean
-    // Mk = Mk + (value - preAvg) * (value - updatedAvg)
-    val newMk = mk + (value - avg) * (value - newAvg)
-
-    Seq(
-      /* count = */ If(IsNull(child), count, newCount),
-      /* avg = */ If(IsNull(child), avg, newAvg),
-      /* mk = */ If(IsNull(child), mk, newMk)
-    )
-  }
-
-  override val mergeExpressions = {
-
-    // count merge
-    val newCount = count.left + count.right
-
-    // average merge
-    val newAvg = ((avg.left * count.left) + (avg.right * count.right)) / newCount
-
-    // update sum of square differences
-    val newMk = {
-      val avgDelta = avg.right - avg.left
-      val mkDelta = (avgDelta * avgDelta) * (count.left * count.right) / newCount
-      mk.left + mk.right + mkDelta
-    }
-
-    Seq(
-      /* count = */ If(IsNull(count.left), count.right,
-                       If(IsNull(count.right), count.left, newCount)),
-      /* avg = */ If(IsNull(avg.left), avg.right,
-                     If(IsNull(avg.right), avg.left, newAvg)),
-      /* mk = */ If(IsNull(mk.left), mk.right,
-                    If(IsNull(mk.right), mk.left, newMk))
-    )
-  }
-
-  override val evaluateExpression = {
-    // when count == 0, return null
-    // when count == 1, return 0
-    // when count >1
-    // stddev_samp = sqrt (mk/(count -1))
-    // stddev_pop = sqrt (mk/count)
-    val varCol =
-      if (isSample) {
-        mk / Cast((count - Cast(Literal(1), resultType)), resultType)
-      } else {
-        mk / count
-      }
-
-    If(EqualTo(count, Cast(Literal(0), resultType)), Cast(Literal(null), resultType),
-      If(EqualTo(count, Cast(Literal(1), resultType)), Cast(Literal(0), resultType),
-        Cast(Sqrt(varCol), resultType)))
-  }
-}
-
-case class Sum(child: Expression) extends DeclarativeAggregate {
-
-  override def children: Seq[Expression] = child :: Nil
-
-  override def nullable: Boolean = true
-
-  // Return data type.
-  override def dataType: DataType = resultType
-
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select sum(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] =
-    Seq(TypeCollection(LongType, DoubleType, DecimalType, NullType))
-
-  private val resultType = child.dataType match {
-    case DecimalType.Fixed(precision, scale) =>
-      DecimalType.bounded(precision + 10, scale)
-    // TODO: Remove this line once we remove the NullType from inputTypes.
-    case NullType => IntegerType
-    case _ => child.dataType
-  }
-
-  private val sumDataType = resultType
-
-  private val sum = AttributeReference("sum", sumDataType)()
-
-  private val zero = Cast(Literal(0), sumDataType)
-
-  override val aggBufferAttributes = sum :: Nil
-
-  override val initialValues = Seq(
-    /* sum = */ Literal.create(null, sumDataType)
-  )
-
-  override val updateExpressions = Seq(
-    /* sum = */
-    Coalesce(Seq(Add(Coalesce(Seq(sum, zero)), Cast(child, sumDataType)), sum))
-  )
-
-  override val mergeExpressions = {
-    val add = Add(Coalesce(Seq(sum.left, zero)), Cast(sum.right, sumDataType))
-    Seq(
-      /* sum = */
-      Coalesce(Seq(add, sum.left))
-    )
-  }
-
-  override val evaluateExpression = Cast(sum, resultType)
-}
-
-/**
- * Compute Pearson correlation between two expressions.
- * When applied on empty data (i.e., count is zero), it returns NULL.
- *
- * Definition of Pearson correlation can be found at
- * http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient
- *
- * @param left one of the expressions to compute correlation with.
- * @param right another expression to compute correlation with.
- */
-case class Corr(
-    left: Expression,
-    right: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0)
-  extends ImperativeAggregate {
-
-  def children: Seq[Expression] = Seq(left, right)
-
-  def nullable: Boolean = false
-
-  def dataType: DataType = DoubleType
-
-  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
-
-  def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
-
-  def inputAggBufferAttributes: Seq[AttributeReference] = aggBufferAttributes.map(_.newInstance())
-
-  val aggBufferAttributes: Seq[AttributeReference] = Seq(
-    AttributeReference("xAvg", DoubleType)(),
-    AttributeReference("yAvg", DoubleType)(),
-    AttributeReference("Ck", DoubleType)(),
-    AttributeReference("MkX", DoubleType)(),
-    AttributeReference("MkY", DoubleType)(),
-    AttributeReference("count", LongType)())
-
-  // Local cache of mutableAggBufferOffset(s) that will be used in update and merge
-  private[this] val mutableAggBufferOffsetPlus1 = mutableAggBufferOffset + 1
-  private[this] val mutableAggBufferOffsetPlus2 = mutableAggBufferOffset + 2
-  private[this] val mutableAggBufferOffsetPlus3 = mutableAggBufferOffset + 3
-  private[this] val mutableAggBufferOffsetPlus4 = mutableAggBufferOffset + 4
-  private[this] val mutableAggBufferOffsetPlus5 = mutableAggBufferOffset + 5
-
-  // Local cache of inputAggBufferOffset(s) that will be used in update and merge
-  private[this] val inputAggBufferOffsetPlus1 = inputAggBufferOffset + 1
-  private[this] val inputAggBufferOffsetPlus2 = inputAggBufferOffset + 2
-  private[this] val inputAggBufferOffsetPlus3 = inputAggBufferOffset + 3
-  private[this] val inputAggBufferOffsetPlus4 = inputAggBufferOffset + 4
-  private[this] val inputAggBufferOffsetPlus5 = inputAggBufferOffset + 5
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def initialize(buffer: MutableRow): Unit = {
-    buffer.setDouble(mutableAggBufferOffset, 0.0)
-    buffer.setDouble(mutableAggBufferOffsetPlus1, 0.0)
-    buffer.setDouble(mutableAggBufferOffsetPlus2, 0.0)
-    buffer.setDouble(mutableAggBufferOffsetPlus3, 0.0)
-    buffer.setDouble(mutableAggBufferOffsetPlus4, 0.0)
-    buffer.setLong(mutableAggBufferOffsetPlus5, 0L)
-  }
-
-  override def update(buffer: MutableRow, input: InternalRow): Unit = {
-    val leftEval = left.eval(input)
-    val rightEval = right.eval(input)
-
-    if (leftEval != null && rightEval != null) {
-      val x = leftEval.asInstanceOf[Double]
-      val y = rightEval.asInstanceOf[Double]
-
-      var xAvg = buffer.getDouble(mutableAggBufferOffset)
-      var yAvg = buffer.getDouble(mutableAggBufferOffsetPlus1)
-      var Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
-      var MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
-      var MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
-      var count = buffer.getLong(mutableAggBufferOffsetPlus5)
-
-      val deltaX = x - xAvg
-      val deltaY = y - yAvg
-      count += 1
-      xAvg += deltaX / count
-      yAvg += deltaY / count
-      Ck += deltaX * (y - yAvg)
-      MkX += deltaX * (x - xAvg)
-      MkY += deltaY * (y - yAvg)
-
-      buffer.setDouble(mutableAggBufferOffset, xAvg)
-      buffer.setDouble(mutableAggBufferOffsetPlus1, yAvg)
-      buffer.setDouble(mutableAggBufferOffsetPlus2, Ck)
-      buffer.setDouble(mutableAggBufferOffsetPlus3, MkX)
-      buffer.setDouble(mutableAggBufferOffsetPlus4, MkY)
-      buffer.setLong(mutableAggBufferOffsetPlus5, count)
-    }
-  }
-
-  // Merge counters from other partitions. Formula can be found at:
-  // http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
-    val count2 = buffer2.getLong(inputAggBufferOffsetPlus5)
-
-    // We only go to merge two buffers if there is at least one record aggregated in buffer2.
-    // We don't need to check count in buffer1 because if count2 is more than zero, totalCount
-    // is more than zero too, then we won't get a divide by zero exception.
-    if (count2 > 0) {
-      var xAvg = buffer1.getDouble(mutableAggBufferOffset)
-      var yAvg = buffer1.getDouble(mutableAggBufferOffsetPlus1)
-      var Ck = buffer1.getDouble(mutableAggBufferOffsetPlus2)
-      var MkX = buffer1.getDouble(mutableAggBufferOffsetPlus3)
-      var MkY = buffer1.getDouble(mutableAggBufferOffsetPlus4)
-      var count = buffer1.getLong(mutableAggBufferOffsetPlus5)
-
-      val xAvg2 = buffer2.getDouble(inputAggBufferOffset)
-      val yAvg2 = buffer2.getDouble(inputAggBufferOffsetPlus1)
-      val Ck2 = buffer2.getDouble(inputAggBufferOffsetPlus2)
-      val MkX2 = buffer2.getDouble(inputAggBufferOffsetPlus3)
-      val MkY2 = buffer2.getDouble(inputAggBufferOffsetPlus4)
-
-      val totalCount = count + count2
-      val deltaX = xAvg - xAvg2
-      val deltaY = yAvg - yAvg2
-      Ck += Ck2 + deltaX * deltaY * count / totalCount * count2
-      xAvg = (xAvg * count + xAvg2 * count2) / totalCount
-      yAvg = (yAvg * count + yAvg2 * count2) / totalCount
-      MkX += MkX2 + deltaX * deltaX * count / totalCount * count2
-      MkY += MkY2 + deltaY * deltaY * count / totalCount * count2
-      count = totalCount
-
-      buffer1.setDouble(mutableAggBufferOffset, xAvg)
-      buffer1.setDouble(mutableAggBufferOffsetPlus1, yAvg)
-      buffer1.setDouble(mutableAggBufferOffsetPlus2, Ck)
-      buffer1.setDouble(mutableAggBufferOffsetPlus3, MkX)
-      buffer1.setDouble(mutableAggBufferOffsetPlus4, MkY)
-      buffer1.setLong(mutableAggBufferOffsetPlus5, count)
-    }
-  }
-
-  override def eval(buffer: InternalRow): Any = {
-    val count = buffer.getLong(mutableAggBufferOffsetPlus5)
-    if (count > 0) {
-      val Ck = buffer.getDouble(mutableAggBufferOffsetPlus2)
-      val MkX = buffer.getDouble(mutableAggBufferOffsetPlus3)
-      val MkY = buffer.getDouble(mutableAggBufferOffsetPlus4)
-      val corr = Ck / math.sqrt(MkX * MkY)
-      if (corr.isNaN) {
-        null
-      } else {
-        corr
-      }
-    } else {
-      null
-    }
-  }
-}
-
 // scalastyle:off
 /**
  * HyperLogLog++ (HLL++) is a state of the art cardinality estimation algorithm. This class
@@ -1058,310 +432,3 @@ object HyperLogLogPlusPlus {
   )
   // scalastyle:on
 }
-
-/**
- * A central moment is the expected value of a specified power of the deviation of a random
- * variable from the mean. Central moments are often used to characterize the properties of about
- * the shape of a distribution.
- *
- * This class implements online, one-pass algorithms for computing the central moments of a set of
- * points.
- *
- * Behavior:
- *  - null values are ignored
- *  - returns `Double.NaN` when the column contains `Double.NaN` values
- *
- * References:
- *  - Xiangrui Meng.  "Simpler Online Updates for Arbitrary-Order Central Moments."
- *      2015. http://arxiv.org/abs/1510.04923
- *
- * @see [[https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
- *     Algorithms for calculating variance (Wikipedia)]]
- *
- * @param child to compute central moments of.
- */
-abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate with Serializable {
-
-  /**
-   * The central moment order to be computed.
-   */
-  protected def momentOrder: Int
-
-  override def children: Seq[Expression] = Seq(child)
-
-  override def nullable: Boolean = false
-
-  override def dataType: DataType = DoubleType
-
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select avg(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
-
-  override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
-
-  /**
-   * Size of aggregation buffer.
-   */
-  private[this] val bufferSize = 5
-
-  override val aggBufferAttributes: Seq[AttributeReference] = Seq.tabulate(bufferSize) { i =>
-    AttributeReference(s"M$i", DoubleType)()
-  }
-
-  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
-  // in the superclass because that will lead to initialization ordering issues.
-  override val inputAggBufferAttributes: Seq[AttributeReference] =
-    aggBufferAttributes.map(_.newInstance())
-
-  // buffer offsets
-  private[this] val nOffset = mutableAggBufferOffset
-  private[this] val meanOffset = mutableAggBufferOffset + 1
-  private[this] val secondMomentOffset = mutableAggBufferOffset + 2
-  private[this] val thirdMomentOffset = mutableAggBufferOffset + 3
-  private[this] val fourthMomentOffset = mutableAggBufferOffset + 4
-
-  // frequently used values for online updates
-  private[this] var delta = 0.0
-  private[this] var deltaN = 0.0
-  private[this] var delta2 = 0.0
-  private[this] var deltaN2 = 0.0
-  private[this] var n = 0.0
-  private[this] var mean = 0.0
-  private[this] var m2 = 0.0
-  private[this] var m3 = 0.0
-  private[this] var m4 = 0.0
-
-  /**
-   * Initialize all moments to zero.
-   */
-  override def initialize(buffer: MutableRow): Unit = {
-    for (aggIndex <- 0 until bufferSize) {
-      buffer.setDouble(mutableAggBufferOffset + aggIndex, 0.0)
-    }
-  }
-
-  /**
-   * Update the central moments buffer.
-   */
-  override def update(buffer: MutableRow, input: InternalRow): Unit = {
-    val v = Cast(child, DoubleType).eval(input)
-    if (v != null) {
-      val updateValue = v match {
-        case d: Double => d
-      }
-
-      n = buffer.getDouble(nOffset)
-      mean = buffer.getDouble(meanOffset)
-
-      n += 1.0
-      buffer.setDouble(nOffset, n)
-      delta = updateValue - mean
-      deltaN = delta / n
-      mean += deltaN
-      buffer.setDouble(meanOffset, mean)
-
-      if (momentOrder >= 2) {
-        m2 = buffer.getDouble(secondMomentOffset)
-        m2 += delta * (delta - deltaN)
-        buffer.setDouble(secondMomentOffset, m2)
-      }
-
-      if (momentOrder >= 3) {
-        delta2 = delta * delta
-        deltaN2 = deltaN * deltaN
-        m3 = buffer.getDouble(thirdMomentOffset)
-        m3 += -3.0 * deltaN * m2 + delta * (delta2 - deltaN2)
-        buffer.setDouble(thirdMomentOffset, m3)
-      }
-
-      if (momentOrder >= 4) {
-        m4 = buffer.getDouble(fourthMomentOffset)
-        m4 += -4.0 * deltaN * m3 - 6.0 * deltaN2 * m2 +
-          delta * (delta * delta2 - deltaN * deltaN2)
-        buffer.setDouble(fourthMomentOffset, m4)
-      }
-    }
-  }
-
-  /**
-   * Merge two central moment buffers.
-   */
-  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
-    val n1 = buffer1.getDouble(nOffset)
-    val n2 = buffer2.getDouble(inputAggBufferOffset)
-    val mean1 = buffer1.getDouble(meanOffset)
-    val mean2 = buffer2.getDouble(inputAggBufferOffset + 1)
-
-    var secondMoment1 = 0.0
-    var secondMoment2 = 0.0
-
-    var thirdMoment1 = 0.0
-    var thirdMoment2 = 0.0
-
-    var fourthMoment1 = 0.0
-    var fourthMoment2 = 0.0
-
-    n = n1 + n2
-    buffer1.setDouble(nOffset, n)
-    delta = mean2 - mean1
-    deltaN = if (n == 0.0) 0.0 else delta / n
-    mean = mean1 + deltaN * n2
-    buffer1.setDouble(mutableAggBufferOffset + 1, mean)
-
-    // higher order moments computed according to:
-    // https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Higher-order_statistics
-    if (momentOrder >= 2) {
-      secondMoment1 = buffer1.getDouble(secondMomentOffset)
-      secondMoment2 = buffer2.getDouble(inputAggBufferOffset + 2)
-      m2 = secondMoment1 + secondMoment2 + delta * deltaN * n1 * n2
-      buffer1.setDouble(secondMomentOffset, m2)
-    }
-
-    if (momentOrder >= 3) {
-      thirdMoment1 = buffer1.getDouble(thirdMomentOffset)
-      thirdMoment2 = buffer2.getDouble(inputAggBufferOffset + 3)
-      m3 = thirdMoment1 + thirdMoment2 + deltaN * deltaN * delta * n1 * n2 *
-        (n1 - n2) + 3.0 * deltaN * (n1 * secondMoment2 - n2 * secondMoment1)
-      buffer1.setDouble(thirdMomentOffset, m3)
-    }
-
-    if (momentOrder >= 4) {
-      fourthMoment1 = buffer1.getDouble(fourthMomentOffset)
-      fourthMoment2 = buffer2.getDouble(inputAggBufferOffset + 4)
-      m4 = fourthMoment1 + fourthMoment2 + deltaN * deltaN * deltaN * delta * n1 *
-        n2 * (n1 * n1 - n1 * n2 + n2 * n2) + deltaN * deltaN * 6.0 *
-        (n1 * n1 * secondMoment2 + n2 * n2 * secondMoment1) +
-        4.0 * deltaN * (n1 * thirdMoment2 - n2 * thirdMoment1)
-      buffer1.setDouble(fourthMomentOffset, m4)
-    }
-  }
-
-  /**
-   * Compute aggregate statistic from sufficient moments.
-   * @param centralMoments Length `momentOrder + 1` array of central moments (un-normalized)
-   *                       needed to compute the aggregate stat.
-   */
-  def getStatistic(n: Double, mean: Double, centralMoments: Array[Double]): Double
-
-  override final def eval(buffer: InternalRow): Any = {
-    val n = buffer.getDouble(nOffset)
-    val mean = buffer.getDouble(meanOffset)
-    val moments = Array.ofDim[Double](momentOrder + 1)
-    moments(0) = 1.0
-    moments(1) = 0.0
-    if (momentOrder >= 2) {
-      moments(2) = buffer.getDouble(secondMomentOffset)
-    }
-    if (momentOrder >= 3) {
-      moments(3) = buffer.getDouble(thirdMomentOffset)
-    }
-    if (momentOrder >= 4) {
-      moments(4) = buffer.getDouble(fourthMomentOffset)
-    }
-
-    getStatistic(n, mean, moments)
-  }
-}
-
-case class VarianceSamp(child: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def prettyName: String = "variance_samp"
-
-  override protected val momentOrder = 2
-
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
-    require(moments.length == momentOrder + 1,
-      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
-
-    if (n == 0.0 || n == 1.0) Double.NaN else moments(2) / (n - 1.0)
-  }
-}
-
-case class VariancePop(child: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def prettyName: String = "variance_pop"
-
-  override protected val momentOrder = 2
-
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
-    require(moments.length == momentOrder + 1,
-      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
-
-    if (n == 0.0) Double.NaN else moments(2) / n
-  }
-}
-
-case class Skewness(child: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def prettyName: String = "skewness"
-
-  override protected val momentOrder = 3
-
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
-    require(moments.length == momentOrder + 1,
-      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
-    val m2 = moments(2)
-    val m3 = moments(3)
-    if (n == 0.0 || m2 == 0.0) {
-      Double.NaN
-    } else {
-      math.sqrt(n) * m3 / math.sqrt(m2 * m2 * m2)
-    }
-  }
-}
-
-case class Kurtosis(child: Expression,
-    mutableAggBufferOffset: Int = 0,
-    inputAggBufferOffset: Int = 0) extends CentralMomentAgg(child) {
-
-  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
-    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
-
-  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
-    copy(inputAggBufferOffset = newInputAggBufferOffset)
-
-  override def prettyName: String = "kurtosis"
-
-  override protected val momentOrder = 4
-
-  // NOTE: this is the formula for excess kurtosis, which is default for R and SciPy
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
-    require(moments.length == momentOrder + 1,
-      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
-    val m2 = moments(2)
-    val m4 = moments(4)
-    if (n == 0.0 || m2 == 0.0) {
-      Double.NaN
-    } else {
-      n * m4 / (m2 * m2) - 3.0
-    }
-  }
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
new file mode 100644
index 000000000000..6da39e714344
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
@@ -0,0 +1,49 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+
+case class Kurtosis(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "kurtosis"
+
+  override protected val momentOrder = 4
+
+  // NOTE: this is the formula for excess kurtosis, which is default for R and SciPy
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
+    val m2 = moments(2)
+    val m4 = moments(4)
+    if (n == 0.0 || m2 == 0.0) {
+      Double.NaN
+    } else {
+      n * m4 / (m2 * m2) - 3.0
+    }
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
new file mode 100644
index 000000000000..8636bfe8d07a
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.AnalysisException
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+/**
+ * Returns the last value of `child` for a group of rows. If the last value of `child`
+ * is `null`, it returns `null` (respecting nulls). Even if [[Last]] is used on a already
+ * sorted column, if we do partial aggregation and final aggregation (when mergeExpression
+ * is used) its result will not be deterministic (unless the input table is sorted and has
+ * a single partition, and we use a single reducer to do the aggregation.).
+ */
+case class Last(child: Expression, ignoreNullsExpr: Expression) extends DeclarativeAggregate {
+
+  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
+
+  private val ignoreNulls: Boolean = ignoreNullsExpr match {
+    case Literal(b: Boolean, BooleanType) => b
+    case _ =>
+      throw new AnalysisException("The second argument of First should be a boolean literal.")
+  }
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // Last is not a deterministic function.
+  override def deterministic: Boolean = false
+
+  // Return data type.
+  override def dataType: DataType = child.dataType
+
+  // Expected input data type.
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  private val last = AttributeReference("last", child.dataType)()
+
+  override val aggBufferAttributes: Seq[AttributeReference] = last :: Nil
+
+  override val initialValues: Seq[Literal] = Seq(
+    /* last = */ Literal.create(null, child.dataType)
+  )
+
+  override val updateExpressions: Seq[Expression] = {
+    if (ignoreNulls) {
+      Seq(
+        /* last = */ If(IsNull(child), last, child)
+      )
+    } else {
+      Seq(
+        /* last = */ child
+      )
+    }
+  }
+
+  override val mergeExpressions: Seq[Expression] = {
+    if (ignoreNulls) {
+      Seq(
+        /* last = */ If(IsNull(last.right), last.left, last.right)
+      )
+    } else {
+      Seq(
+        /* last = */ last.right
+      )
+    }
+  }
+
+  override val evaluateExpression: AttributeReference = last
+
+  override def toString: String = s"last($child)${if (ignoreNulls) " ignore nulls"}"
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
new file mode 100644
index 000000000000..b9d75ad45283
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+case class Max(child: Expression) extends DeclarativeAggregate {
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // Return data type.
+  override def dataType: DataType = child.dataType
+
+  // Expected input data type.
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  private val max = AttributeReference("max", child.dataType)()
+
+  override val aggBufferAttributes: Seq[AttributeReference] = max :: Nil
+
+  override val initialValues: Seq[Literal] = Seq(
+    /* max = */ Literal.create(null, child.dataType)
+  )
+
+  override val updateExpressions: Seq[Expression] = Seq(
+    /* max = */ If(IsNull(child), max, If(IsNull(max), child, Greatest(Seq(max, child))))
+  )
+
+  override val mergeExpressions: Seq[Expression] = {
+    val greatest = Greatest(Seq(max.left, max.right))
+    Seq(
+      /* max = */ If(IsNull(max.right), max.left, If(IsNull(max.left), max.right, greatest))
+    )
+  }
+
+  override val evaluateExpression: AttributeReference = max
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
new file mode 100644
index 000000000000..5ed9cd348dab
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+
+case class Min(child: Expression) extends DeclarativeAggregate {
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // Return data type.
+  override def dataType: DataType = child.dataType
+
+  // Expected input data type.
+  override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
+
+  private val min = AttributeReference("min", child.dataType)()
+
+  override val aggBufferAttributes: Seq[AttributeReference] = min :: Nil
+
+  override val initialValues: Seq[Expression] = Seq(
+    /* min = */ Literal.create(null, child.dataType)
+  )
+
+  override val updateExpressions: Seq[Expression] = Seq(
+    /* min = */ If(IsNull(child), min, If(IsNull(min), child, Least(Seq(min, child))))
+  )
+
+  override val mergeExpressions: Seq[Expression] = {
+    val least = Least(Seq(min.left, min.right))
+    Seq(
+      /* min = */ If(IsNull(min.right), min.left, If(IsNull(min.left), min.right, least))
+    )
+  }
+
+  override val evaluateExpression: AttributeReference = min
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
new file mode 100644
index 000000000000..0def7ddfd9d3
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+
+case class Skewness(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "skewness"
+
+  override protected val momentOrder = 3
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
+    val m2 = moments(2)
+    val m3 = moments(3)
+    if (n == 0.0 || m2 == 0.0) {
+      Double.NaN
+    } else {
+      math.sqrt(n) * m3 / math.sqrt(m2 * m2 * m2)
+    }
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
new file mode 100644
index 000000000000..3f47ffe13cbc
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+
+// Compute the population standard deviation of a column
+case class StddevPop(child: Expression) extends StddevAgg(child) {
+  override def isSample: Boolean = false
+  override def prettyName: String = "stddev_pop"
+}
+
+
+// Compute the sample standard deviation of a column
+case class StddevSamp(child: Expression) extends StddevAgg(child) {
+  override def isSample: Boolean = true
+  override def prettyName: String = "stddev_samp"
+}
+
+
+// Compute standard deviation based on online algorithm specified here:
+// http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
+
+  def isSample: Boolean
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  override def dataType: DataType = resultType
+
+  // Expected input data type.
+  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
+  // new version at planning time (after analysis phase). For now, NullType is added at here
+  // to make it resolved when we have cases like `select stddev(null)`.
+  // We can use our analyzer to cast NullType to the default data type of the NumericType once
+  // we remove the old aggregate functions. Then, we will not need NullType at here.
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+
+  private val resultType = DoubleType
+
+  private val count = AttributeReference("count", resultType)()
+  private val avg = AttributeReference("avg", resultType)()
+  private val mk = AttributeReference("mk", resultType)()
+
+  override val aggBufferAttributes = count :: avg :: mk :: Nil
+
+  override val initialValues: Seq[Expression] = Seq(
+    /* count = */ Cast(Literal(0), resultType),
+    /* avg = */ Cast(Literal(0), resultType),
+    /* mk = */ Cast(Literal(0), resultType)
+  )
+
+  override val updateExpressions: Seq[Expression] = {
+    val value = Cast(child, resultType)
+    val newCount = count + Cast(Literal(1), resultType)
+
+    // update average
+    // avg = avg + (value - avg)/count
+    val newAvg = avg + (value - avg) / newCount
+
+    // update sum ofference from mean
+    // Mk = Mk + (value - preAvg) * (value - updatedAvg)
+    val newMk = mk + (value - avg) * (value - newAvg)
+
+    Seq(
+      /* count = */ If(IsNull(child), count, newCount),
+      /* avg = */ If(IsNull(child), avg, newAvg),
+      /* mk = */ If(IsNull(child), mk, newMk)
+    )
+  }
+
+  override val mergeExpressions: Seq[Expression] = {
+
+    // count merge
+    val newCount = count.left + count.right
+
+    // average merge
+    val newAvg = ((avg.left * count.left) + (avg.right * count.right)) / newCount
+
+    // update sum of square differences
+    val newMk = {
+      val avgDelta = avg.right - avg.left
+      val mkDelta = (avgDelta * avgDelta) * (count.left * count.right) / newCount
+      mk.left + mk.right + mkDelta
+    }
+
+    Seq(
+      /* count = */ If(IsNull(count.left), count.right,
+                       If(IsNull(count.right), count.left, newCount)),
+      /* avg = */ If(IsNull(avg.left), avg.right,
+                     If(IsNull(avg.right), avg.left, newAvg)),
+      /* mk = */ If(IsNull(mk.left), mk.right,
+                    If(IsNull(mk.right), mk.left, newMk))
+    )
+  }
+
+  override val evaluateExpression: Expression = {
+    // when count == 0, return null
+    // when count == 1, return 0
+    // when count >1
+    // stddev_samp = sqrt (mk/(count -1))
+    // stddev_pop = sqrt (mk/count)
+    val varCol =
+      if (isSample) {
+        mk / Cast(count - Cast(Literal(1), resultType), resultType)
+      } else {
+        mk / count
+      }
+
+    If(EqualTo(count, Cast(Literal(0), resultType)), Cast(Literal(null), resultType),
+      If(EqualTo(count, Cast(Literal(1), resultType)), Cast(Literal(0), resultType),
+        Cast(Sqrt(varCol), resultType)))
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
new file mode 100644
index 000000000000..7f8adbc56ad1
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types._
+
+case class Sum(child: Expression) extends DeclarativeAggregate {
+
+  override def children: Seq[Expression] = child :: Nil
+
+  override def nullable: Boolean = true
+
+  // Return data type.
+  override def dataType: DataType = resultType
+
+  // Expected input data type.
+  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
+  // new version at planning time (after analysis phase). For now, NullType is added at here
+  // to make it resolved when we have cases like `select sum(null)`.
+  // We can use our analyzer to cast NullType to the default data type of the NumericType once
+  // we remove the old aggregate functions. Then, we will not need NullType at here.
+  override def inputTypes: Seq[AbstractDataType] =
+    Seq(TypeCollection(LongType, DoubleType, DecimalType, NullType))
+
+  private val resultType = child.dataType match {
+    case DecimalType.Fixed(precision, scale) =>
+      DecimalType.bounded(precision + 10, scale)
+    // TODO: Remove this line once we remove the NullType from inputTypes.
+    case NullType => IntegerType
+    case _ => child.dataType
+  }
+
+  private val sumDataType = resultType
+
+  private val sum = AttributeReference("sum", sumDataType)()
+
+  private val zero = Cast(Literal(0), sumDataType)
+
+  override val aggBufferAttributes = sum :: Nil
+
+  override val initialValues: Seq[Expression] = Seq(
+    /* sum = */ Literal.create(null, sumDataType)
+  )
+
+  override val updateExpressions: Seq[Expression] = Seq(
+    /* sum = */
+    Coalesce(Seq(Add(Coalesce(Seq(sum, zero)), Cast(child, sumDataType)), sum))
+  )
+
+  override val mergeExpressions: Seq[Expression] = {
+    val add = Add(Coalesce(Seq(sum.left, zero)), Cast(sum.right, sumDataType))
+    Seq(
+      /* sum = */
+      Coalesce(Seq(add, sum.left))
+    )
+  }
+
+  override val evaluateExpression: Expression = Cast(sum, resultType)
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
similarity index 100%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/utils.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
new file mode 100644
index 000000000000..ec63534e5290
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions.aggregate
+
+import org.apache.spark.sql.catalyst.expressions._
+
+case class VarianceSamp(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "var_samp"
+
+  override protected val momentOrder = 2
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
+
+    if (n == 0.0 || n == 1.0) Double.NaN else moments(2) / (n - 1.0)
+  }
+}
+
+case class VariancePop(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def prettyName: String = "var_pop"
+
+  override protected val momentOrder = 2
+
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
+
+    if (n == 0.0) Double.NaN else moments(2) / n
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
index 89d63abd9f27..3dcf7915d77b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
@@ -549,7 +549,7 @@ case class SumDistinct(child: Expression) extends UnaryExpression with PartialAg
     case _ =>
       child.dataType
   }
-  override def toString: String = s"SUM(DISTINCT $child)"
+  override def toString: String = s"sum(distinct $child)"
   override def newInstance(): SumDistinctFunction = new SumDistinctFunction(child, this)
 
   override def asPartial: SplitEvaluation = {
@@ -646,7 +646,7 @@ case class First(
 
   override def nullable: Boolean = true
   override def dataType: DataType = child.dataType
-  override def toString: String = s"FIRST(${child}${if (ignoreNulls) " IGNORE NULLS"})"
+  override def toString: String = s"first(${child}${if (ignoreNulls) " ignore nulls"})"
 
   override def asPartial: SplitEvaluation = {
     val partialFirst = Alias(First(child, ignoreNulls), "PartialFirst")()
@@ -707,7 +707,7 @@ case class Last(
   override def references: AttributeSet = child.references
   override def nullable: Boolean = true
   override def dataType: DataType = child.dataType
-  override def toString: String = s"LAST($child)${if (ignoreNulls) " IGNORE NULLS"}"
+  override def toString: String = s"last($child)${if (ignoreNulls) " ignore nulls"}"
 
   override def asPartial: SplitEvaluation = {
     val partialLast = Alias(Last(child, ignoreNulls), "PartialLast")()
@@ -756,7 +756,7 @@ case class Corr(left: Expression, right: Expression)
     extends BinaryExpression with AggregateExpression1 with ImplicitCastInputTypes {
   override def nullable: Boolean = false
   override def dataType: DoubleType.type = DoubleType
-  override def toString: String = s"CORRELATION($left, $right)"
+  override def toString: String = s"corr($left, $right)"
   override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
   override def newInstance(): AggregateFunction1 = {
     throw new UnsupportedOperationException(
@@ -788,14 +788,14 @@ abstract class StddevAgg1(child: Expression) extends UnaryExpression with Partia
 // Compute the population standard deviation of a column
 case class StddevPop(child: Expression) extends StddevAgg1(child) {
 
-  override def toString: String = s"STDDEV_POP($child)"
+  override def toString: String = s"stddev_pop($child)"
   override def isSample: Boolean = false
 }
 
 // Compute the sample standard deviation of a column
 case class StddevSamp(child: Expression) extends StddevAgg1(child) {
 
-  override def toString: String = s"STDDEV_SAMP($child)"
+  override def toString: String = s"stddev_samp($child)"
   override def isSample: Boolean = true
 }
 
@@ -1019,8 +1019,6 @@ case class Kurtosis(child: Expression) extends UnaryExpression with AggregateExp
   override def foldable: Boolean = false
 
   override def prettyName: String = "kurtosis"
-
-  override def toString: String = s"KURTOSIS($child)"
 }
 
 // placeholder
@@ -1038,8 +1036,6 @@ case class Skewness(child: Expression) extends UnaryExpression with AggregateExp
   override def foldable: Boolean = false
 
   override def prettyName: String = "skewness"
-
-  override def toString: String = s"SKEWNESS($child)"
 }
 
 // placeholder
@@ -1056,9 +1052,7 @@ case class VariancePop(child: Expression) extends UnaryExpression with Aggregate
 
   override def foldable: Boolean = false
 
-  override def prettyName: String = "variance_pop"
-
-  override def toString: String = s"VAR_POP($child)"
+  override def prettyName: String = "var_pop"
 }
 
 // placeholder
@@ -1075,7 +1069,5 @@ case class VarianceSamp(child: Expression) extends UnaryExpression with Aggregat
 
   override def foldable: Boolean = false
 
-  override def prettyName: String = "variance_samp"
-
-  override def toString: String = s"VAR_SAMP($child)"
+  override def prettyName: String = "var_samp"
 }

From 701fb5052080fa8c0a79ad7c1e65693ccf444787 Mon Sep 17 00:00:00 2001
From: Adam Roberts <aroberts@uk.ibm.com>
Date: Wed, 4 Nov 2015 14:03:31 -0800
Subject: [PATCH 495/896] [SPARK-10949] Update Snappy version to 1.1.2

This is an updated version of #8995 by a-roberts. Original description follows:

Snappy now supports concatenation of serialized streams, this patch contains a version number change and the "does not support" test is now a "supports" test.

Snappy 1.1.2 changelog mentions:

> snappy-java-1.1.2 (22 September 2015)
> This is a backward compatible release for 1.1.x.
> Add AIX (32-bit) support.
> There is no upgrade for the native libraries of the other platforms.

> A major change since 1.1.1 is a support for reading concatenated results of SnappyOutputStream(s)
> snappy-java-1.1.2-RC2 (18 May 2015)
> Fix #107: SnappyOutputStream.close() is not idempotent
> snappy-java-1.1.2-RC1 (13 May 2015)
> SnappyInputStream now supports reading concatenated compressed results of SnappyOutputStream
> There has been no compressed format change since 1.0.5.x. So You can read the compressed results > interchangeablly between these versions.
> Fixes a problem when java.io.tmpdir does not exist.

Closes #8995.

Author: Adam Roberts <aroberts@uk.ibm.com>
Author: Josh Rosen <joshrosen@databricks.com>

Closes #9439 from JoshRosen/update-snappy.
---
 .../org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java  | 4 ++--
 .../main/scala/org/apache/spark/io/CompressionCodec.scala   | 5 +++++
 .../scala/org/apache/spark/io/CompressionCodecSuite.scala   | 6 ++----
 pom.xml                                                     | 2 +-
 4 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
index e19b37864293..6a0a89e81c32 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
@@ -254,8 +254,8 @@ private long[] mergeSpills(SpillInfo[] spills) throws IOException {
     final CompressionCodec compressionCodec = CompressionCodec$.MODULE$.createCodec(sparkConf);
     final boolean fastMergeEnabled =
       sparkConf.getBoolean("spark.shuffle.unsafe.fastMergeEnabled", true);
-    final boolean fastMergeIsSupported =
-      !compressionEnabled || compressionCodec instanceof LZFCompressionCodec;
+    final boolean fastMergeIsSupported = !compressionEnabled ||
+      CompressionCodec$.MODULE$.supportsConcatenationOfSerializedStreams(compressionCodec);
     try {
       if (spills.length == 0) {
         new FileOutputStream(outputFile).close(); // Create an empty file
diff --git a/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala b/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala
index 9dc36704a676..ca74eedf89be 100644
--- a/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala
+++ b/core/src/main/scala/org/apache/spark/io/CompressionCodec.scala
@@ -47,6 +47,11 @@ trait CompressionCodec {
 private[spark] object CompressionCodec {
 
   private val configKey = "spark.io.compression.codec"
+
+  private[spark] def supportsConcatenationOfSerializedStreams(codec: CompressionCodec): Boolean = {
+    codec.isInstanceOf[SnappyCompressionCodec] || codec.isInstanceOf[LZFCompressionCodec]
+  }
+
   private val shortCompressionCodecNames = Map(
     "lz4" -> classOf[LZ4CompressionCodec].getName,
     "lzf" -> classOf[LZFCompressionCodec].getName,
diff --git a/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala b/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala
index cbdb33c89d0f..1553ab60bdda 100644
--- a/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala
+++ b/core/src/test/scala/org/apache/spark/io/CompressionCodecSuite.scala
@@ -100,12 +100,10 @@ class CompressionCodecSuite extends SparkFunSuite {
     testCodec(codec)
   }
 
-  test("snappy does not support concatenation of serialized streams") {
+  test("snappy supports concatenation of serialized streams") {
     val codec = CompressionCodec.createCodec(conf, classOf[SnappyCompressionCodec].getName)
     assert(codec.getClass === classOf[SnappyCompressionCodec])
-    intercept[Exception] {
-      testConcatenationOfSerializedStreams(codec)
-    }
+    testConcatenationOfSerializedStreams(codec)
   }
 
   test("bad compression codec") {
diff --git a/pom.xml b/pom.xml
index 762bfc728233..f5a3e44fc0a3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -165,7 +165,7 @@
     <jline.groupid>org.scala-lang</jline.groupid>
     <codehaus.jackson.version>1.9.13</codehaus.jackson.version>
     <fasterxml.jackson.version>2.4.4</fasterxml.jackson.version>
-    <snappy.version>1.1.1.7</snappy.version>
+    <snappy.version>1.1.2</snappy.version>
     <netlib.java.version>1.1.2</netlib.java.version>
     <calcite.version>1.2.0-incubating</calcite.version>
     <commons-codec.version>1.10</commons-codec.version>

From 1b6a5d4af9691c3f7f3ebee3146dc13d12a0e047 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 4 Nov 2015 14:45:02 -0800
Subject: [PATCH 496/896] [SPARK-11493] remove bitset from BytesToBytesMap

Since we have 4 bytes as number of records in the beginning of a page, the address can not be zero, so we do not need the bitset.

For performance concerns, the bitset could help speed up false lookup if the slot is empty (because bitset is smaller than longArray, cache hit rate will be higher). In practice, the map is filled with 35% - 70% (use 50% as average), so only half of the false lookups can benefit of it, all others will pay the cost of load the bitset (still need to access the longArray anyway).

For aggregation, we always need to access the longArray (insert a new key after false lookup), also confirmed by a benchmark.

 For broadcast hash join, there could be a regression, but a simple benchmark showed that it may not (most of lookup are false):

```
sqlContext.range(1<<20).write.parquet("small")
df = sqlContext.read.parquet('small')
for i in range(3):
    t = time.time()
    df2 = sqlContext.range(1<<26).selectExpr("id * 1111111111 % 987654321 as id2")
    df2.join(df, df.id == df2.id2).count()
    print time.time() -t
```

Having bitset (used time in seconds):
```
17.5404241085
10.2758829594
10.5786800385
```
After removing bitset (used time in seconds):
```
21.8939979076
12.4132959843
9.97224712372
```

cc rxin nongli

Author: Davies Liu <davies@databricks.com>

Closes #9452 from davies/remove_bitset.
---
 .../spark/unsafe/map/BytesToBytesMap.java     |  58 +++------
 .../apache/spark/unsafe/bitset/BitSet.java    | 113 ------------------
 .../spark/unsafe/bitset/BitSetSuite.java      |  88 --------------
 3 files changed, 15 insertions(+), 244 deletions(-)
 delete mode 100644 unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java
 delete mode 100644 unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java

diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index e36709c6fc84..07241c827c2a 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -35,7 +35,6 @@
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.array.LongArray;
-import org.apache.spark.unsafe.bitset.BitSet;
 import org.apache.spark.unsafe.hash.Murmur3_x86_32;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.unsafe.memory.MemoryLocation;
@@ -123,12 +122,6 @@ public final class BytesToBytesMap extends MemoryConsumer {
    */
   private boolean canGrowArray = true;
 
-  /**
-   * A {@link BitSet} used to track location of the map where the key is set.
-   * Size of the bitset should be half of the size of the long array.
-   */
-  @Nullable private BitSet bitset;
-
   private final double loadFactor;
 
   /**
@@ -427,7 +420,6 @@ public Location lookup(Object keyBase, long keyOffset, int keyLength) {
    * This is a thread-safe version of `lookup`, could be used by multiple threads.
    */
   public void safeLookup(Object keyBase, long keyOffset, int keyLength, Location loc) {
-    assert(bitset != null);
     assert(longArray != null);
 
     if (enablePerfMetrics) {
@@ -440,7 +432,7 @@ public void safeLookup(Object keyBase, long keyOffset, int keyLength, Location l
       if (enablePerfMetrics) {
         numProbes++;
       }
-      if (!bitset.isSet(pos)) {
+      if (longArray.get(pos * 2) == 0) {
         // This is a new key.
         loc.with(pos, hashcode, false);
         return;
@@ -644,7 +636,6 @@ public boolean putNewKey(Object keyBase, long keyOffset, int keyLength,
       assert (!isDefined) : "Can only set value once for a key";
       assert (keyLength % 8 == 0);
       assert (valueLength % 8 == 0);
-      assert(bitset != null);
       assert(longArray != null);
 
       if (numElements == MAX_CAPACITY || !canGrowArray) {
@@ -678,7 +669,6 @@ public boolean putNewKey(Object keyBase, long keyOffset, int keyLength,
       Platform.putInt(base, offset, Platform.getInt(base, offset) + 1);
       pageCursor += recordLength;
       numElements++;
-      bitset.set(pos);
       final long storedKeyAddress = taskMemoryManager.encodePageNumberAndOffset(
         currentPage, recordOffset);
       longArray.set(pos * 2, storedKeyAddress);
@@ -734,7 +724,6 @@ private void allocate(int capacity) {
     assert (capacity <= MAX_CAPACITY);
     acquireMemory(capacity * 16);
     longArray = new LongArray(MemoryBlock.fromLongArray(new long[capacity * 2]));
-    bitset = new BitSet(MemoryBlock.fromLongArray(new long[capacity / 64]));
 
     this.growthThreshold = (int) (capacity * loadFactor);
     this.mask = capacity - 1;
@@ -749,7 +738,6 @@ public void freeArray() {
       long used = longArray.memoryBlock().size();
       longArray = null;
       releaseMemory(used);
-      bitset = null;
     }
   }
 
@@ -795,9 +783,7 @@ public long getTotalMemoryConsumption() {
     for (MemoryBlock dataPage : dataPages) {
       totalDataPagesSize += dataPage.size();
     }
-    return totalDataPagesSize +
-      ((bitset != null) ? bitset.memoryBlock().size() : 0L) +
-      ((longArray != null) ? longArray.memoryBlock().size() : 0L);
+    return totalDataPagesSize + ((longArray != null) ? longArray.memoryBlock().size() : 0L);
   }
 
   private void updatePeakMemoryUsed() {
@@ -852,7 +838,6 @@ public int getNumDataPages() {
    */
   @VisibleForTesting
   void growAndRehash() {
-    assert(bitset != null);
     assert(longArray != null);
 
     long resizeStartTime = -1;
@@ -861,39 +846,26 @@ void growAndRehash() {
     }
     // Store references to the old data structures to be used when we re-hash
     final LongArray oldLongArray = longArray;
-    final BitSet oldBitSet = bitset;
-    final int oldCapacity = (int) oldBitSet.capacity();
+    final int oldCapacity = (int) oldLongArray.size() / 2;
 
     // Allocate the new data structures
-    try {
-      allocate(Math.min(growthStrategy.nextCapacity(oldCapacity), MAX_CAPACITY));
-    } catch (OutOfMemoryError oom) {
-      longArray = oldLongArray;
-      bitset = oldBitSet;
-      throw oom;
-    }
+    allocate(Math.min(growthStrategy.nextCapacity(oldCapacity), MAX_CAPACITY));
 
     // Re-mask (we don't recompute the hashcode because we stored all 32 bits of it)
-    for (int pos = oldBitSet.nextSetBit(0); pos >= 0; pos = oldBitSet.nextSetBit(pos + 1)) {
-      final long keyPointer = oldLongArray.get(pos * 2);
-      final int hashcode = (int) oldLongArray.get(pos * 2 + 1);
+    for (int i = 0; i < oldLongArray.size(); i += 2) {
+      final long keyPointer = oldLongArray.get(i);
+      if (keyPointer == 0) {
+        continue;
+      }
+      final int hashcode = (int) oldLongArray.get(i + 1);
       int newPos = hashcode & mask;
       int step = 1;
-      boolean keepGoing = true;
-
-      // No need to check for equality here when we insert so this has one less if branch than
-      // the similar code path in addWithoutResize.
-      while (keepGoing) {
-        if (!bitset.isSet(newPos)) {
-          bitset.set(newPos);
-          longArray.set(newPos * 2, keyPointer);
-          longArray.set(newPos * 2 + 1, hashcode);
-          keepGoing = false;
-        } else {
-          newPos = (newPos + step) & mask;
-          step++;
-        }
+      while (longArray.get(newPos * 2) != 0) {
+        newPos = (newPos + step) & mask;
+        step++;
       }
+      longArray.set(newPos * 2, keyPointer);
+      longArray.set(newPos * 2 + 1, hashcode);
     }
     releaseMemory(oldLongArray.memoryBlock().size());
 
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java b/unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java
deleted file mode 100644
index 7c124173b0bb..000000000000
--- a/unsafe/src/main/java/org/apache/spark/unsafe/bitset/BitSet.java
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.unsafe.bitset;
-
-import org.apache.spark.unsafe.array.LongArray;
-import org.apache.spark.unsafe.memory.MemoryBlock;
-
-/**
- * A fixed size uncompressed bit set backed by a {@link LongArray}.
- *
- * Each bit occupies exactly one bit of storage.
- */
-public final class BitSet {
-
-  /** A long array for the bits. */
-  private final LongArray words;
-
-  /** Length of the long array. */
-  private final int numWords;
-
-  private final Object baseObject;
-  private final long baseOffset;
-
-  /**
-   * Creates a new {@link BitSet} using the specified memory block. Size of the memory block must be
-   * multiple of 8 bytes (i.e. 64 bits).
-   */
-  public BitSet(MemoryBlock memory) {
-    words = new LongArray(memory);
-    assert (words.size() <= Integer.MAX_VALUE);
-    numWords = (int) words.size();
-    baseObject = words.memoryBlock().getBaseObject();
-    baseOffset = words.memoryBlock().getBaseOffset();
-  }
-
-  public MemoryBlock memoryBlock() {
-    return words.memoryBlock();
-  }
-
-  /**
-   * Returns the number of bits in this {@code BitSet}.
-   */
-  public long capacity() {
-    return numWords * 64;
-  }
-
-  /**
-   * Sets the bit at the specified index to {@code true}.
-   */
-  public void set(int index) {
-    assert index < numWords * 64 : "index (" + index + ") should < length (" + numWords * 64 + ")";
-    BitSetMethods.set(baseObject, baseOffset, index);
-  }
-
-  /**
-   * Sets the bit at the specified index to {@code false}.
-   */
-  public void unset(int index) {
-    assert index < numWords * 64 : "index (" + index + ") should < length (" + numWords * 64 + ")";
-    BitSetMethods.unset(baseObject, baseOffset, index);
-  }
-
-  /**
-   * Returns {@code true} if the bit is set at the specified index.
-   */
-  public boolean isSet(int index) {
-    assert index < numWords * 64 : "index (" + index + ") should < length (" + numWords * 64 + ")";
-    return BitSetMethods.isSet(baseObject, baseOffset, index);
-  }
-
-  /**
-   * Returns the index of the first bit that is set to true that occurs on or after the
-   * specified starting index. If no such bit exists then {@code -1} is returned.
-   * <p>
-   * To iterate over the true bits in a BitSet, use the following loop:
-   * <pre>
-   * <code>
-   *  for (long i = bs.nextSetBit(0); i &gt;= 0; i = bs.nextSetBit(i + 1)) {
-   *    // operate on index i here
-   *  }
-   * </code>
-   * </pre>
-   *
-   * @param fromIndex the index to start checking from (inclusive)
-   * @return the index of the next set bit, or -1 if there is no such bit
-   */
-  public int nextSetBit(int fromIndex) {
-    return BitSetMethods.nextSetBit(baseObject, baseOffset, fromIndex, numWords);
-  }
-
-  /**
-   * Returns {@code true} if any bit is set.
-   */
-  public boolean anySet() {
-    return BitSetMethods.anySet(baseObject, baseOffset, numWords);
-  }
-
-}
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java b/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java
deleted file mode 100644
index 14e38683df4a..000000000000
--- a/unsafe/src/test/java/org/apache/spark/unsafe/bitset/BitSetSuite.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.unsafe.bitset;
-
-import org.junit.Assert;
-import org.junit.Test;
-
-import org.apache.spark.unsafe.memory.MemoryBlock;
-
-public class BitSetSuite {
-
-  private static BitSet createBitSet(int capacity) {
-    Assert.assertEquals(0, capacity % 64);
-    return new BitSet(MemoryBlock.fromLongArray(new long[capacity / 64]));
-  }
-
-  @Test
-  public void basicOps() {
-    BitSet bs = createBitSet(64);
-    Assert.assertEquals(64, bs.capacity());
-
-    // Make sure the bit set starts empty.
-    for (int i = 0; i < bs.capacity(); i++) {
-      Assert.assertFalse(bs.isSet(i));
-    }
-    // another form of asserting that the bit set is empty
-    Assert.assertFalse(bs.anySet());
-
-    // Set every bit and check it.
-    for (int i = 0; i < bs.capacity(); i++) {
-      bs.set(i);
-      Assert.assertTrue(bs.isSet(i));
-    }
-
-    // Unset every bit and check it.
-    for (int i = 0; i < bs.capacity(); i++) {
-      Assert.assertTrue(bs.isSet(i));
-      bs.unset(i);
-      Assert.assertFalse(bs.isSet(i));
-    }
-
-    // Make sure anySet() can detect any set bit
-    bs = createBitSet(256);
-    bs.set(64);
-    Assert.assertTrue(bs.anySet());
-  }
-
-  @Test
-  public void traversal() {
-    BitSet bs = createBitSet(256);
-
-    Assert.assertEquals(-1, bs.nextSetBit(0));
-    Assert.assertEquals(-1, bs.nextSetBit(10));
-    Assert.assertEquals(-1, bs.nextSetBit(64));
-
-    bs.set(10);
-    Assert.assertEquals(10, bs.nextSetBit(0));
-    Assert.assertEquals(10, bs.nextSetBit(1));
-    Assert.assertEquals(10, bs.nextSetBit(10));
-    Assert.assertEquals(-1, bs.nextSetBit(11));
-
-    bs.set(11);
-    Assert.assertEquals(10, bs.nextSetBit(10));
-    Assert.assertEquals(11, bs.nextSetBit(11));
-
-    // Skip a whole word and find it
-    bs.set(190);
-    Assert.assertEquals(190, bs.nextSetBit(12));
-
-    Assert.assertEquals(-1, bs.nextSetBit(191));
-    Assert.assertEquals(-1, bs.nextSetBit(256));
-  }
-}

From 411ff6afb485c9d8cfc667c9346f836f2529ea9f Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Wed, 4 Nov 2015 15:28:19 -0800
Subject: [PATCH 497/896] [SPARK-10028][MLLIB][PYTHON] Add Python API for
 PrefixSpan

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #9469 from yu-iskw/SPARK-10028.
---
 .../api/python/PrefixSpanModelWrapper.scala   | 32 +++++++++
 .../mllib/api/python/PythonMLLibAPI.scala     | 23 ++++++-
 python/pyspark/mllib/fpm.py                   | 69 ++++++++++++++++++-
 3 files changed, 122 insertions(+), 2 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/api/python/PrefixSpanModelWrapper.scala

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PrefixSpanModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PrefixSpanModelWrapper.scala
new file mode 100644
index 000000000000..0027602a04f8
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PrefixSpanModelWrapper.scala
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.api.python
+
+import org.apache.spark.mllib.fpm.PrefixSpanModel
+import org.apache.spark.rdd.RDD
+
+/**
+ * A Wrapper of PrefixSpanModel to provide helper method for Python
+ */
+private[python] class PrefixSpanModelWrapper(model: PrefixSpanModel[Any])
+  extends PrefixSpanModel(model.freqSequences) {
+
+  def getFreqSequences: RDD[Array[Any]] = {
+    SerDe.fromTuple2RDD(model.freqSequences.map(x => (x.javaSequence, x.freq)))
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
index 21e55938fa7a..40c41806cdfe 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
@@ -35,7 +35,7 @@ import org.apache.spark.mllib.classification._
 import org.apache.spark.mllib.clustering._
 import org.apache.spark.mllib.evaluation.RankingMetrics
 import org.apache.spark.mllib.feature._
-import org.apache.spark.mllib.fpm.{FPGrowth, FPGrowthModel}
+import org.apache.spark.mllib.fpm.{FPGrowth, FPGrowthModel, PrefixSpan}
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.linalg.distributed._
 import org.apache.spark.mllib.optimization._
@@ -557,6 +557,27 @@ private[python] class PythonMLLibAPI extends Serializable {
     new FPGrowthModelWrapper(model)
   }
 
+  /**
+   * Java stub for Python mllib PrefixSpan.train().  This stub returns a handle
+   * to the Java object instead of the content of the Java object.  Extra care
+   * needs to be taken in the Python code to ensure it gets freed on exit; see
+   * the Py4J documentation.
+   */
+  def trainPrefixSpanModel(
+      data: JavaRDD[java.util.ArrayList[java.util.ArrayList[Any]]],
+      minSupport: Double,
+      maxPatternLength: Int,
+      localProjDBSize: Int ): PrefixSpanModelWrapper = {
+    val prefixSpan = new PrefixSpan()
+      .setMinSupport(minSupport)
+      .setMaxPatternLength(maxPatternLength)
+      .setMaxLocalProjDBSize(localProjDBSize)
+
+    val trainData = data.rdd.map(_.asScala.toArray.map(_.asScala.toArray))
+    val model = prefixSpan.run(trainData)
+    new PrefixSpanModelWrapper(model)
+  }
+
   /**
    * Java stub for Normalizer.transform()
    */
diff --git a/python/pyspark/mllib/fpm.py b/python/pyspark/mllib/fpm.py
index bdabba9602a8..2039decc0cb3 100644
--- a/python/pyspark/mllib/fpm.py
+++ b/python/pyspark/mllib/fpm.py
@@ -23,7 +23,7 @@
 from pyspark.rdd import ignore_unicode_prefix
 from pyspark.mllib.common import JavaModelWrapper, callMLlibFunc, inherit_doc
 
-__all__ = ['FPGrowth', 'FPGrowthModel']
+__all__ = ['FPGrowth', 'FPGrowthModel', 'PrefixSpan', 'PrefixSpanModel']
 
 
 @inherit_doc
@@ -85,6 +85,73 @@ class FreqItemset(namedtuple("FreqItemset", ["items", "freq"])):
         """
 
 
+@inherit_doc
+@ignore_unicode_prefix
+class PrefixSpanModel(JavaModelWrapper):
+    """
+    .. note:: Experimental
+
+    Model fitted by PrefixSpan
+
+    >>> data = [
+    ...    [["a", "b"], ["c"]],
+    ...    [["a"], ["c", "b"], ["a", "b"]],
+    ...    [["a", "b"], ["e"]],
+    ...    [["f"]]]
+    >>> rdd = sc.parallelize(data, 2)
+    >>> model = PrefixSpan.train(rdd)
+    >>> sorted(model.freqSequences().collect())
+    [FreqSequence(sequence=[[u'a']], freq=3), FreqSequence(sequence=[[u'a'], [u'a']], freq=1), ...
+
+    .. versionadded:: 1.6.0
+    """
+
+    @since("1.6.0")
+    def freqSequences(self):
+        """Gets frequence sequences"""
+        return self.call("getFreqSequences").map(lambda x: PrefixSpan.FreqSequence(x[0], x[1]))
+
+
+class PrefixSpan(object):
+    """
+    .. note:: Experimental
+
+    A parallel PrefixSpan algorithm to mine frequent sequential patterns.
+    The PrefixSpan algorithm is described in J. Pei, et al., PrefixSpan:
+    Mining Sequential Patterns Efficiently by Prefix-Projected Pattern Growth
+    ([[http://doi.org/10.1109/ICDE.2001.914830]]).
+
+    .. versionadded:: 1.6.0
+    """
+
+    @classmethod
+    @since("1.6.0")
+    def train(cls, data, minSupport=0.1, maxPatternLength=10, maxLocalProjDBSize=32000000):
+        """
+        Finds the complete set of frequent sequential patterns in the input sequences of itemsets.
+
+        :param data: The input data set, each element contains a sequnce of itemsets.
+        :param minSupport: the minimal support level of the sequential pattern, any pattern appears
+            more than  (minSupport * size-of-the-dataset) times will be output (default: `0.1`)
+        :param maxPatternLength: the maximal length of the sequential pattern, any pattern appears
+            less than maxPatternLength will be output. (default: `10`)
+        :param maxLocalProjDBSize: The maximum number of items (including delimiters used in
+            the internal storage format) allowed in a projected database before local
+            processing. If a projected database exceeds this size, another
+            iteration of distributed prefix growth is run. (default: `32000000`)
+        """
+        model = callMLlibFunc("trainPrefixSpanModel",
+                              data, minSupport, maxPatternLength, maxLocalProjDBSize)
+        return PrefixSpanModel(model)
+
+    class FreqSequence(namedtuple("FreqSequence", ["sequence", "freq"])):
+        """
+        Represents a (sequence, freq) tuple.
+
+        .. versionadded:: 1.6.0
+        """
+
+
 def _test():
     import doctest
     import pyspark.mllib.fpm

From b6e0a5ae6f243139f11c9cbbf18cddd3f25db208 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 4 Nov 2015 16:49:25 -0800
Subject: [PATCH 498/896] [SPARK-11510][SQL] Remove SQL aggregation tests for
 higher order statistics

We have some aggregate function tests in both DataFrameAggregateSuite and SQLQuerySuite. The two have almost the same coverage and we should just remove the SQL one.

Author: Reynold Xin <rxin@databricks.com>

Closes #9475 from rxin/SPARK-11510.
---
 .../spark/sql/DataFrameAggregateSuite.scala   | 97 ++++++-------------
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 77 ---------------
 .../spark/sql/StringFunctionsSuite.scala      |  1 -
 3 files changed, 28 insertions(+), 147 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index b0e2ffaa6068..2e679e7bc4e0 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -83,13 +83,8 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
 
   test("average") {
     checkAnswer(
-      testData2.agg(avg('a)),
-      Row(2.0))
-
-    // Also check mean
-    checkAnswer(
-      testData2.agg(mean('a)),
-      Row(2.0))
+      testData2.agg(avg('a), mean('a)),
+      Row(2.0, 2.0))
 
     checkAnswer(
       testData2.agg(avg('a), sumDistinct('a)), // non-partial
@@ -98,6 +93,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     checkAnswer(
       decimalData.agg(avg('a)),
       Row(new java.math.BigDecimal(2.0)))
+
     checkAnswer(
       decimalData.agg(avg('a), sumDistinct('a)), // non-partial
       Row(new java.math.BigDecimal(2.0), new java.math.BigDecimal(6)) :: Nil)
@@ -168,44 +164,23 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
 
   test("zero count") {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
-    assert(emptyTableData.count() === 0)
-
     checkAnswer(
       emptyTableData.agg(count('a), sumDistinct('a)), // non-partial
       Row(0, null))
   }
 
   test("stddev") {
-    val testData2ADev = math.sqrt(4/5.0)
-
+    val testData2ADev = math.sqrt(4 / 5.0)
     checkAnswer(
-      testData2.agg(stddev('a)),
-      Row(testData2ADev))
-
-    checkAnswer(
-      testData2.agg(stddev_pop('a)),
-      Row(math.sqrt(4/6.0)))
-
-    checkAnswer(
-      testData2.agg(stddev_samp('a)),
-      Row(testData2ADev))
+      testData2.agg(stddev('a), stddev_pop('a), stddev_samp('a)),
+      Row(testData2ADev, math.sqrt(4 / 6.0), testData2ADev))
   }
 
   test("zero stddev") {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
-    assert(emptyTableData.count() == 0)
-
-    checkAnswer(
-    emptyTableData.agg(stddev('a)),
-    Row(null))
-
     checkAnswer(
-    emptyTableData.agg(stddev_pop('a)),
-    Row(null))
-
-    checkAnswer(
-    emptyTableData.agg(stddev_samp('a)),
-    Row(null))
+    emptyTableData.agg(stddev('a), stddev_pop('a), stddev_samp('a)),
+    Row(null, null, null))
   }
 
   test("zero sum") {
@@ -227,6 +202,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
 
     val sparkVariance = testData2.agg(variance('a))
     checkAggregatesWithTol(sparkVariance, Row(4.0 / 5.0), absTol)
+
     val sparkVariancePop = testData2.agg(var_pop('a))
     checkAggregatesWithTol(sparkVariancePop, Row(4.0 / 6.0), absTol)
 
@@ -241,52 +217,35 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
   }
 
   test("zero moments") {
-    val emptyTableData = Seq((1, 2)).toDF("a", "b")
-    assert(emptyTableData.count() === 1)
-
-    checkAnswer(
-      emptyTableData.agg(variance('a)),
-      Row(Double.NaN))
-
-    checkAnswer(
-      emptyTableData.agg(var_samp('a)),
-      Row(Double.NaN))
-
+    val input = Seq((1, 2)).toDF("a", "b")
     checkAnswer(
-      emptyTableData.agg(var_pop('a)),
-      Row(0.0))
+      input.agg(variance('a), var_samp('a), var_pop('a), skewness('a), kurtosis('a)),
+      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN))
 
     checkAnswer(
-      emptyTableData.agg(skewness('a)),
-      Row(Double.NaN))
-
-    checkAnswer(
-      emptyTableData.agg(kurtosis('a)),
-      Row(Double.NaN))
+      input.agg(
+        expr("variance(a)"),
+        expr("var_samp(a)"),
+        expr("var_pop(a)"),
+        expr("skewness(a)"),
+        expr("kurtosis(a)")),
+      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN))
   }
 
   test("null moments") {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
-    assert(emptyTableData.count() === 0)
-
-    checkAnswer(
-      emptyTableData.agg(variance('a)),
-      Row(Double.NaN))
-
-    checkAnswer(
-      emptyTableData.agg(var_samp('a)),
-      Row(Double.NaN))
-
-    checkAnswer(
-      emptyTableData.agg(var_pop('a)),
-      Row(Double.NaN))
 
     checkAnswer(
-      emptyTableData.agg(skewness('a)),
-      Row(Double.NaN))
+      emptyTableData.agg(variance('a), var_samp('a), var_pop('a), skewness('a), kurtosis('a)),
+      Row(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN))
 
     checkAnswer(
-      emptyTableData.agg(kurtosis('a)),
-      Row(Double.NaN))
+      emptyTableData.agg(
+        expr("variance(a)"),
+        expr("var_samp(a)"),
+        expr("var_pop(a)"),
+        expr("skewness(a)"),
+        expr("kurtosis(a)")),
+      Row(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN))
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 5731a356243e..3de277a79a52 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -726,83 +726,6 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     }
   }
 
-  test("stddev") {
-    checkAnswer(
-      sql("SELECT STDDEV(a) FROM testData2"),
-      Row(math.sqrt(4.0 / 5.0))
-    )
-  }
-
-  test("stddev_pop") {
-    checkAnswer(
-      sql("SELECT STDDEV_POP(a) FROM testData2"),
-      Row(math.sqrt(4.0 / 6.0))
-    )
-  }
-
-  test("stddev_samp") {
-    checkAnswer(
-      sql("SELECT STDDEV_SAMP(a) FROM testData2"),
-      Row(math.sqrt(4/5.0))
-    )
-  }
-
-  test("var_samp") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT VAR_SAMP(a) FROM testData2")
-    val expectedAnswer = Row(4.0 / 5.0)
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
-  test("variance") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT VARIANCE(a) FROM testData2")
-    val expectedAnswer = Row(0.8)
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
-  test("var_pop") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT VAR_POP(a) FROM testData2")
-    val expectedAnswer = Row(4.0 / 6.0)
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
-  test("skewness") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT skewness(a) FROM testData2")
-    val expectedAnswer = Row(0.0)
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
-  test("kurtosis") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT kurtosis(a) FROM testData2")
-    val expectedAnswer = Row(-1.5)
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
-  test("stddev agg") {
-    checkAnswer(
-      sql("SELECT a, stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2 GROUP BY a"),
-      (1 to 3).map(i => Row(i, math.sqrt(1.0 / 2.0), math.sqrt(1.0 / 4.0), math.sqrt(1.0 / 2.0))))
-  }
-
-  test("variance agg") {
-    val absTol = 1e-8
-    checkAggregatesWithTol(
-      sql("SELECT a, variance(b), var_samp(b), var_pop(b) FROM testData2 GROUP BY a"),
-      (1 to 3).map(i => Row(i, 1.0 / 2.0, 1.0 / 2.0, 1.0 / 4.0)),
-      absTol)
-  }
-
-  test("skewness and kurtosis agg") {
-    val absTol = 1e-8
-    val sparkAnswer = sql("SELECT a, skewness(b), kurtosis(b) FROM testData2 GROUP BY a")
-    val expectedAnswer = (1 to 3).map(i => Row(i, 0.0, -2.0))
-    checkAggregatesWithTol(sparkAnswer, expectedAnswer, absTol)
-  }
-
   test("inner join where, one match per row") {
     checkAnswer(
       sql("SELECT * FROM upperCaseData JOIN lowerCaseData WHERE n = N"),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/StringFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/StringFunctionsSuite.scala
index e12e6bea3026..e2090b0a83ce 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/StringFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/StringFunctionsSuite.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql
 
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
-import org.apache.spark.sql.types.Decimal
 
 
 class StringFunctionsSuite extends QueryTest with SharedSQLContext {

From ce5e6a2849ae860689fa3e7d5aaa12216945ea99 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 4 Nov 2015 16:58:38 -0800
Subject: [PATCH 499/896] [SPARK-11491] Update build to use Scala 2.10.5

Spark should build against Scala 2.10.5, since that includes a fix for Scaladoc that will fix doc snapshot publishing: https://issues.scala-lang.org/browse/SI-8479

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9450 from JoshRosen/upgrade-to-scala-2.10.5.
---
 LICENSE                            | 10 +++++-----
 dev/audit-release/README.md        |  2 +-
 dev/audit-release/audit_release.py |  2 +-
 docker/spark-test/base/Dockerfile  |  2 +-
 docs/_config.yml                   |  2 +-
 pom.xml                            |  4 ++--
 project/SparkBuild.scala           |  2 +-
 7 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/LICENSE b/LICENSE
index 790476ece15b..0db2d14465bd 100644
--- a/LICENSE
+++ b/LICENSE
@@ -250,11 +250,11 @@ The text of each license is also included at licenses/LICENSE-[project].txt.
         (Interpreter classes (all .scala files in repl/src/main/scala
         except for Main.Scala, SparkHelper.scala and ExecutorClassLoader.scala),
         and for SerializableMapWrapper in JavaUtils.scala)
-     (BSD-like) Scala Actors library (org.scala-lang:scala-actors:2.10.4 - http://www.scala-lang.org/)
-     (BSD-like) Scala Compiler (org.scala-lang:scala-compiler:2.10.4 - http://www.scala-lang.org/)
-     (BSD-like) Scala Compiler (org.scala-lang:scala-reflect:2.10.4 - http://www.scala-lang.org/)
-     (BSD-like) Scala Library (org.scala-lang:scala-library:2.10.4 - http://www.scala-lang.org/)
-     (BSD-like) Scalap (org.scala-lang:scalap:2.10.4 - http://www.scala-lang.org/)
+     (BSD-like) Scala Actors library (org.scala-lang:scala-actors:2.10.5 - http://www.scala-lang.org/)
+     (BSD-like) Scala Compiler (org.scala-lang:scala-compiler:2.10.5 - http://www.scala-lang.org/)
+     (BSD-like) Scala Compiler (org.scala-lang:scala-reflect:2.10.5 - http://www.scala-lang.org/)
+     (BSD-like) Scala Library (org.scala-lang:scala-library:2.10.5 - http://www.scala-lang.org/)
+     (BSD-like) Scalap (org.scala-lang:scalap:2.10.5 - http://www.scala-lang.org/)
      (BSD-style) scalacheck (org.scalacheck:scalacheck_2.10:1.10.0 - http://www.scalacheck.org)
      (BSD-style) spire (org.spire-math:spire_2.10:0.7.1 - http://spire-math.org)
      (BSD-style) spire-macros (org.spire-math:spire-macros_2.10:0.7.1 - http://spire-math.org)
diff --git a/dev/audit-release/README.md b/dev/audit-release/README.md
index 38becda0eae9..f72f8c653a26 100644
--- a/dev/audit-release/README.md
+++ b/dev/audit-release/README.md
@@ -4,7 +4,7 @@ run them locally by setting appropriate environment variables.
 
 ```
 $ cd sbt_app_core
-$ SCALA_VERSION=2.10.4 \
+$ SCALA_VERSION=2.10.5 \
   SPARK_VERSION=1.0.0-SNAPSHOT \
   SPARK_RELEASE_REPOSITORY=file:///home/patrick/.ivy2/local \
   sbt run
diff --git a/dev/audit-release/audit_release.py b/dev/audit-release/audit_release.py
index 0b7069f6e116..27d1dd784ce2 100755
--- a/dev/audit-release/audit_release.py
+++ b/dev/audit-release/audit_release.py
@@ -35,7 +35,7 @@
 RELEASE_KEY = "XXXXXXXX" # Your 8-digit hex
 RELEASE_REPOSITORY = "https://repository.apache.org/content/repositories/orgapachespark-1033"
 RELEASE_VERSION = "1.1.1"
-SCALA_VERSION = "2.10.4"
+SCALA_VERSION = "2.10.5"
 SCALA_BINARY_VERSION = "2.10"
 
 # Do not set these
diff --git a/docker/spark-test/base/Dockerfile b/docker/spark-test/base/Dockerfile
index 5dbdb8b22a44..7ba0de603dc7 100644
--- a/docker/spark-test/base/Dockerfile
+++ b/docker/spark-test/base/Dockerfile
@@ -25,7 +25,7 @@ RUN apt-get update && \
     apt-get install -y less openjdk-7-jre-headless net-tools vim-tiny sudo openssh-server && \
     rm -rf /var/lib/apt/lists/*
 
-ENV SCALA_VERSION 2.10.4
+ENV SCALA_VERSION 2.10.5
 ENV CDH_VERSION cdh4
 ENV SCALA_HOME /opt/scala-$SCALA_VERSION
 ENV SPARK_HOME /opt/spark
diff --git a/docs/_config.yml b/docs/_config.yml
index c59cc465ef89..2c70b76be8b7 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -17,7 +17,7 @@ include:
 SPARK_VERSION: 1.6.0-SNAPSHOT
 SPARK_VERSION_SHORT: 1.6.0
 SCALA_BINARY_VERSION: "2.10"
-SCALA_VERSION: "2.10.4"
+SCALA_VERSION: "2.10.5"
 MESOS_VERSION: 0.21.0
 SPARK_ISSUE_TRACKER_URL: https://issues.apache.org/jira/browse/SPARK
 SPARK_GITHUB_URL: https://github.com/apache/spark
diff --git a/pom.xml b/pom.xml
index f5a3e44fc0a3..4ed1c0c82dee 100644
--- a/pom.xml
+++ b/pom.xml
@@ -159,7 +159,7 @@
     <!--  commons-httpclient/commons-httpclient-->
     <httpclient.classic.version>3.1</httpclient.classic.version>
     <commons.math3.version>3.4.1</commons.math3.version>
-    <scala.version>2.10.4</scala.version>
+    <scala.version>2.10.5</scala.version>
     <scala.binary.version>2.10</scala.binary.version>
     <jline.version>${scala.version}</jline.version>
     <jline.groupid>org.scala-lang</jline.groupid>
@@ -2422,7 +2422,7 @@
         <property><name>!scala-2.11</name></property>
       </activation>
       <properties>
-        <scala.version>2.10.4</scala.version>
+        <scala.version>2.10.5</scala.version>
         <scala.binary.version>2.10</scala.binary.version>
         <jline.version>${scala.version}</jline.version>
         <jline.groupid>org.scala-lang</jline.groupid>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 766edd9500c3..75c36930dece 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -316,7 +316,7 @@ object OldDeps {
 
   def oldDepsSettings() = Defaults.coreDefaultSettings ++ Seq(
     name := "old-deps",
-    scalaVersion := "2.10.4",
+    scalaVersion := "2.10.5",
     retrieveManaged := true,
     retrievePattern := "[type]s/[artifact](-[revision])(-[classifier]).[ext]",
     libraryDependencies := Seq("spark-streaming-mqtt", "spark-streaming-zeromq",

From a752ddad7fe1d0f01b51f7551ec017ff87e1eea5 Mon Sep 17 00:00:00 2001
From: Zhenhua Wang <wangzhenhua@huawei.com>
Date: Wed, 4 Nov 2015 17:16:00 -0800
Subject: [PATCH 500/896] [SPARK-11398] [SQL] unnecessary def dialectClassName
 in HiveContext, and misleading dialect conf at the start of spark-sql
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

1. def dialectClassName in HiveContext is unnecessary.
In HiveContext, if conf.dialect == "hiveql", getSQLDialect() will return new HiveQLDialect(this);
else it will use super.getSQLDialect(). Then in super.getSQLDialect(), it calls dialectClassName, which is overriden in HiveContext and still return super.dialectClassName.
So we'll never reach the code "classOf[HiveQLDialect].getCanonicalName" of def dialectClassName in HiveContext.

2. When we start bin/spark-sql, the default context is HiveContext, and the corresponding dialect is hiveql.
However, if we type "set spark.sql.dialect;", the result is "sql", which is inconsistent with the actual dialect and is misleading. For example, we can use sql like "create table" which is only allowed in hiveql, but this dialect conf shows it's "sql".
Although this problem will not cause any execution error, it's misleading to spark sql users. Therefore I think we should fix it.
In this pr, while procesing “set spark.sql.dialect” in SetCommand, I use "conf.dialect" instead of "getConf()" for the case of key == SQLConf.DIALECT.key, so that it will return the right dialect conf.

Author: Zhenhua Wang <wangzhenhua@huawei.com>

Closes #9349 from wzhfy/dialect.
---
 .../scala/org/apache/spark/sql/execution/commands.scala    | 6 +++++-
 .../main/scala/org/apache/spark/sql/hive/HiveContext.scala | 6 ------
 .../apache/spark/sql/hive/execution/SQLQuerySuite.scala    | 7 +++++++
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index 856607615ae8..e5f60b15e735 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -156,7 +156,11 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
       val runFunc = (sqlContext: SQLContext) => {
         val value =
           try {
-            sqlContext.getConf(key)
+            if (key == SQLConf.DIALECT.key) {
+              sqlContext.conf.dialect
+            } else {
+              sqlContext.getConf(key)
+            }
           } catch {
             case _: NoSuchElementException => "<undefined>"
           }
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 83a81cf5d1fc..1f5135320326 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -555,12 +555,6 @@ class HiveContext private[hive](
     override def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE, false)
   }
 
-  protected[sql] override def dialectClassName = if (conf.dialect == "hiveql") {
-    classOf[HiveQLDialect].getCanonicalName
-  } else {
-    super.dialectClassName
-  }
-
   protected[sql] override def getSQLDialect(): ParserDialect = {
     if (conf.dialect == "hiveql") {
       new HiveQLDialect(this)
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index fd380641dcc7..af48d478953b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -335,6 +335,13 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
     }
   }
 
+  test("SQL dialect at the start of HiveContext") {
+    val hiveContext = new HiveContext(sqlContext.sparkContext)
+    val dialectConf = "spark.sql.dialect"
+    checkAnswer(hiveContext.sql(s"set $dialectConf"), Row(dialectConf, "hiveql"))
+    assert(hiveContext.getSQLDialect().getClass === classOf[HiveQLDialect])
+  }
+
   test("SQL Dialect Switching") {
     assert(getSQLDialect().getClass === classOf[HiveQLDialect])
     setConf("spark.sql.dialect", classOf[MyDialect].getCanonicalName())

From d0b56339625727744e2c30fc2167bc6a457d37f7 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 4 Nov 2015 17:19:52 -0800
Subject: [PATCH 501/896] [SPARK-11307] Reduce memory consumption of
 OutputCommitCoordinator

OutputCommitCoordinator uses a map in a place where an array would suffice, increasing its memory consumption for result stages with millions of tasks.

This patch replaces that map with an array. The only tricky part of this is reasoning about the range of possible array indexes in order to make sure that we never index out of bounds.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9274 from JoshRosen/SPARK-11307.
---
 .../apache/spark/scheduler/DAGScheduler.scala |  8 +++-
 .../scheduler/OutputCommitCoordinator.scala   | 40 ++++++++++++-------
 .../OutputCommitCoordinatorSuite.scala        |  2 +-
 3 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 5673fbf2c8fe..a1f0fd05f661 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -947,7 +947,13 @@ class DAGScheduler(
     // serializable. If tasks are not serializable, a SparkListenerStageCompleted event
     // will be posted, which should always come after a corresponding SparkListenerStageSubmitted
     // event.
-    outputCommitCoordinator.stageStart(stage.id)
+    stage match {
+      case s: ShuffleMapStage =>
+        outputCommitCoordinator.stageStart(stage = s.id, maxPartitionId = s.numPartitions - 1)
+      case s: ResultStage =>
+        outputCommitCoordinator.stageStart(
+          stage = s.id, maxPartitionId = s.rdd.partitions.length - 1)
+    }
     val taskIdToLocations: Map[Int, Seq[TaskLocation]] = try {
       stage match {
         case s: ShuffleMapStage =>
diff --git a/core/src/main/scala/org/apache/spark/scheduler/OutputCommitCoordinator.scala b/core/src/main/scala/org/apache/spark/scheduler/OutputCommitCoordinator.scala
index add0dedc03f4..4d146678174f 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/OutputCommitCoordinator.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/OutputCommitCoordinator.scala
@@ -47,6 +47,8 @@ private[spark] class OutputCommitCoordinator(conf: SparkConf, isDriver: Boolean)
   private type PartitionId = Int
   private type TaskAttemptNumber = Int
 
+  private val NO_AUTHORIZED_COMMITTER: TaskAttemptNumber = -1
+
   /**
    * Map from active stages's id => partition id => task attempt with exclusive lock on committing
    * output for that partition.
@@ -56,9 +58,7 @@ private[spark] class OutputCommitCoordinator(conf: SparkConf, isDriver: Boolean)
    *
    * Access to this map should be guarded by synchronizing on the OutputCommitCoordinator instance.
    */
-  private val authorizedCommittersByStage: CommittersByStageMap = mutable.Map()
-  private type CommittersByStageMap =
-    mutable.Map[StageId, mutable.Map[PartitionId, TaskAttemptNumber]]
+  private val authorizedCommittersByStage = mutable.Map[StageId, Array[TaskAttemptNumber]]()
 
   /**
    * Returns whether the OutputCommitCoordinator's internal data structures are all empty.
@@ -95,9 +95,21 @@ private[spark] class OutputCommitCoordinator(conf: SparkConf, isDriver: Boolean)
     }
   }
 
-  // Called by DAGScheduler
-  private[scheduler] def stageStart(stage: StageId): Unit = synchronized {
-    authorizedCommittersByStage(stage) = mutable.HashMap[PartitionId, TaskAttemptNumber]()
+  /**
+   * Called by the DAGScheduler when a stage starts.
+   *
+   * @param stage the stage id.
+   * @param maxPartitionId the maximum partition id that could appear in this stage's tasks (i.e.
+   *                       the maximum possible value of `context.partitionId`).
+   */
+  private[scheduler] def stageStart(
+      stage: StageId,
+      maxPartitionId: Int): Unit = {
+    val arr = new Array[TaskAttemptNumber](maxPartitionId + 1)
+    java.util.Arrays.fill(arr, NO_AUTHORIZED_COMMITTER)
+    synchronized {
+      authorizedCommittersByStage(stage) = arr
+    }
   }
 
   // Called by DAGScheduler
@@ -122,10 +134,10 @@ private[spark] class OutputCommitCoordinator(conf: SparkConf, isDriver: Boolean)
         logInfo(s"Task was denied committing, stage: $stage, partition: $partition, " +
           s"attempt: $attemptNumber")
       case otherReason =>
-        if (authorizedCommitters.get(partition).exists(_ == attemptNumber)) {
+        if (authorizedCommitters(partition) == attemptNumber) {
           logDebug(s"Authorized committer (attemptNumber=$attemptNumber, stage=$stage, " +
             s"partition=$partition) failed; clearing lock")
-          authorizedCommitters.remove(partition)
+          authorizedCommitters(partition) = NO_AUTHORIZED_COMMITTER
         }
     }
   }
@@ -145,16 +157,16 @@ private[spark] class OutputCommitCoordinator(conf: SparkConf, isDriver: Boolean)
       attemptNumber: TaskAttemptNumber): Boolean = synchronized {
     authorizedCommittersByStage.get(stage) match {
       case Some(authorizedCommitters) =>
-        authorizedCommitters.get(partition) match {
-          case Some(existingCommitter) =>
-            logDebug(s"Denying attemptNumber=$attemptNumber to commit for stage=$stage, " +
-              s"partition=$partition; existingCommitter = $existingCommitter")
-            false
-          case None =>
+        authorizedCommitters(partition) match {
+          case NO_AUTHORIZED_COMMITTER =>
             logDebug(s"Authorizing attemptNumber=$attemptNumber to commit for stage=$stage, " +
               s"partition=$partition")
             authorizedCommitters(partition) = attemptNumber
             true
+          case existingCommitter =>
+            logDebug(s"Denying attemptNumber=$attemptNumber to commit for stage=$stage, " +
+              s"partition=$partition; existingCommitter = $existingCommitter")
+            false
         }
       case None =>
         logDebug(s"Stage $stage has completed, so not allowing attempt number $attemptNumber of" +
diff --git a/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
index 48456a9cd6e7..7345508bfe99 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/OutputCommitCoordinatorSuite.scala
@@ -171,7 +171,7 @@ class OutputCommitCoordinatorSuite extends SparkFunSuite with BeforeAndAfter {
     val partition: Int = 2
     val authorizedCommitter: Int = 3
     val nonAuthorizedCommitter: Int = 100
-    outputCommitCoordinator.stageStart(stage)
+    outputCommitCoordinator.stageStart(stage, maxPartitionId = 2)
 
     assert(outputCommitCoordinator.canCommit(stage, partition, authorizedCommitter))
     assert(!outputCommitCoordinator.canCommit(stage, partition, nonAuthorizedCommitter))

From 81498dd5c86ca51d2fb351c8ef52cbb28e6844f4 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 4 Nov 2015 21:30:21 -0800
Subject: [PATCH 502/896] [SPARK-11425] [SPARK-11486] Improve hybrid
 aggregation

After aggregation, the dataset could be smaller than inputs, so it's better to do hash based aggregation for all inputs, then using sort based aggregation to merge them.

Author: Davies Liu <davies@databricks.com>

Closes #9383 from davies/fix_switch.
---
 .../spark/unsafe/map/BytesToBytesMap.java     |  46 +++--
 .../unsafe/sort/UnsafeExternalSorter.java     |  39 ++--
 .../unsafe/sort/UnsafeInMemorySorter.java     |  15 +-
 .../UnsafeFixedWidthAggregationMap.java       |   9 +-
 .../sql/execution/UnsafeKVExternalSorter.java |  23 ++-
 .../TungstenAggregationIterator.scala         | 171 +++++-------------
 .../UnsafeFixedWidthAggregationMapSuite.scala |  64 +++----
 .../execution/AggregationQuerySuite.scala     |  12 +-
 8 files changed, 165 insertions(+), 214 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index 07241c827c2a..6656fd1d0bc5 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -20,6 +20,7 @@
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.Iterator;
 import java.util.LinkedList;
 
@@ -638,7 +639,11 @@ public boolean putNewKey(Object keyBase, long keyOffset, int keyLength,
       assert (valueLength % 8 == 0);
       assert(longArray != null);
 
-      if (numElements == MAX_CAPACITY || !canGrowArray) {
+
+      if (numElements == MAX_CAPACITY
+        // The map could be reused from last spill (because of no enough memory to grow),
+        // then we don't try to grow again if hit the `growthThreshold`.
+        || !canGrowArray && numElements > growthThreshold) {
         return false;
       }
 
@@ -730,25 +735,18 @@ private void allocate(int capacity) {
   }
 
   /**
-   * Free the memory used by longArray.
+   * Free all allocated memory associated with this map, including the storage for keys and values
+   * as well as the hash map array itself.
+   *
+   * This method is idempotent and can be called multiple times.
    */
-  public void freeArray() {
+  public void free() {
     updatePeakMemoryUsed();
     if (longArray != null) {
       long used = longArray.memoryBlock().size();
       longArray = null;
       releaseMemory(used);
     }
-  }
-
-  /**
-   * Free all allocated memory associated with this map, including the storage for keys and values
-   * as well as the hash map array itself.
-   *
-   * This method is idempotent and can be called multiple times.
-   */
-  public void free() {
-    freeArray();
     Iterator<MemoryBlock> dataPagesIterator = dataPages.iterator();
     while (dataPagesIterator.hasNext()) {
       MemoryBlock dataPage = dataPagesIterator.next();
@@ -833,6 +831,28 @@ public int getNumDataPages() {
     return dataPages.size();
   }
 
+  /**
+   * Returns the underline long[] of longArray.
+   */
+  public long[] getArray() {
+    assert(longArray != null);
+    return (long[]) longArray.memoryBlock().getBaseObject();
+  }
+
+  /**
+   * Reset this map to initialized state.
+   */
+  public void reset() {
+    numElements = 0;
+    Arrays.fill(getArray(), 0);
+    while (dataPages.size() > 0) {
+      MemoryBlock dataPage = dataPages.removeLast();
+      freePage(dataPage);
+    }
+    currentPage = null;
+    pageCursor = 0;
+  }
+
   /**
    * Grows the size of the hash table and re-hash everything.
    */
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index 509fb0a044c0..cba043bc48cc 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -79,9 +79,13 @@ public static UnsafeExternalSorter createWithExistingInMemorySorter(
       PrefixComparator prefixComparator,
       int initialSize,
       long pageSizeBytes,
-      UnsafeInMemorySorter inMemorySorter) {
-    return new UnsafeExternalSorter(taskMemoryManager, blockManager,
+      UnsafeInMemorySorter inMemorySorter) throws IOException {
+    UnsafeExternalSorter sorter = new UnsafeExternalSorter(taskMemoryManager, blockManager,
       taskContext, recordComparator, prefixComparator, initialSize, pageSizeBytes, inMemorySorter);
+    sorter.spill(Long.MAX_VALUE, sorter);
+    // The external sorter will be used to insert records, in-memory sorter is not needed.
+    sorter.inMemSorter = null;
+    return sorter;
   }
 
   public static UnsafeExternalSorter create(
@@ -124,7 +128,6 @@ private UnsafeExternalSorter(
       acquireMemory(inMemSorter.getMemoryUsage());
     } else {
       this.inMemSorter = existingInMemorySorter;
-      // will acquire after free the map
     }
     this.peakMemoryUsedBytes = getMemoryUsage();
 
@@ -157,12 +160,9 @@ public void closeCurrentPage() {
    */
   @Override
   public long spill(long size, MemoryConsumer trigger) throws IOException {
-    assert(inMemSorter != null);
     if (trigger != this) {
       if (readingIterator != null) {
         return readingIterator.spill();
-      } else {
-
       }
       return 0L; // this should throw exception
     }
@@ -388,25 +388,38 @@ public void insertKVRecord(Object keyBase, long keyOffset, int keyLen,
     inMemSorter.insertRecord(recordAddress, prefix);
   }
 
+  /**
+   * Merges another UnsafeExternalSorters into this one, the other one will be emptied.
+   *
+   * @throws IOException
+   */
+  public void merge(UnsafeExternalSorter other) throws IOException {
+    other.spill();
+    spillWriters.addAll(other.spillWriters);
+    // remove them from `spillWriters`, or the files will be deleted in `cleanupResources`.
+    other.spillWriters.clear();
+    other.cleanupResources();
+  }
+
   /**
    * Returns a sorted iterator. It is the caller's responsibility to call `cleanupResources()`
    * after consuming this iterator.
    */
   public UnsafeSorterIterator getSortedIterator() throws IOException {
-    assert(inMemSorter != null);
-    readingIterator = new SpillableIterator(inMemSorter.getSortedIterator());
-    int numIteratorsToMerge = spillWriters.size() + (readingIterator.hasNext() ? 1 : 0);
     if (spillWriters.isEmpty()) {
+      assert(inMemSorter != null);
+      readingIterator = new SpillableIterator(inMemSorter.getSortedIterator());
       return readingIterator;
     } else {
       final UnsafeSorterSpillMerger spillMerger =
-        new UnsafeSorterSpillMerger(recordComparator, prefixComparator, numIteratorsToMerge);
+        new UnsafeSorterSpillMerger(recordComparator, prefixComparator, spillWriters.size());
       for (UnsafeSorterSpillWriter spillWriter : spillWriters) {
         spillMerger.addSpillIfNotEmpty(spillWriter.getReader(blockManager));
       }
-      spillWriters.clear();
-      spillMerger.addSpillIfNotEmpty(readingIterator);
-
+      if (inMemSorter != null) {
+        readingIterator = new SpillableIterator(inMemSorter.getSortedIterator());
+        spillMerger.addSpillIfNotEmpty(readingIterator);
+      }
       return spillMerger.getSortedIterator();
     }
   }
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
index 1480f0681ed9..d57213b9b8bf 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
@@ -19,9 +19,9 @@
 
 import java.util.Comparator;
 
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.util.collection.Sorter;
-import org.apache.spark.memory.TaskMemoryManager;
 
 /**
  * Sorts records using an AlphaSort-style key-prefix sort. This sort stores pointers to records
@@ -77,13 +77,20 @@ public int compare(RecordPointerAndKeyPrefix r1, RecordPointerAndKeyPrefix r2) {
    */
   private int pos = 0;
 
+  public UnsafeInMemorySorter(
+    final TaskMemoryManager memoryManager,
+    final RecordComparator recordComparator,
+    final PrefixComparator prefixComparator,
+    int initialSize) {
+    this(memoryManager, recordComparator, prefixComparator, new long[initialSize * 2]);
+  }
+
   public UnsafeInMemorySorter(
       final TaskMemoryManager memoryManager,
       final RecordComparator recordComparator,
       final PrefixComparator prefixComparator,
-      int initialSize) {
-    assert (initialSize > 0);
-    this.array = new long[initialSize * 2];
+      long[] array) {
+    this.array = array;
     this.memoryManager = memoryManager;
     this.sorter = new Sorter<>(UnsafeSortDataFormat.INSTANCE);
     this.sortComparator = new SortComparator(recordComparator, prefixComparator, memoryManager);
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
index d4b6d75b4d98..a2f99d566d47 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
@@ -236,16 +236,13 @@ public void printPerfMetrics() {
 
   /**
    * Sorts the map's records in place, spill them to disk, and returns an [[UnsafeKVExternalSorter]]
-   * that can be used to insert more records to do external sorting.
    *
-   * The only memory that is allocated is the address/prefix array, 16 bytes per record.
-   *
-   * Note that this destroys the map, and as a result, the map cannot be used anymore after this.
+   * Note that the map will be reset for inserting new records, and the returned sorter can NOT be used
+   * to insert records.
    */
   public UnsafeKVExternalSorter destructAndCreateExternalSorter() throws IOException {
-    UnsafeKVExternalSorter sorter = new UnsafeKVExternalSorter(
+    return new UnsafeKVExternalSorter(
       groupingKeySchema, aggregationBufferSchema,
       SparkEnv.get().blockManager(), map.getPageSizeBytes(), map);
-    return sorter;
   }
 }
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index 845f2ae6859b..e2898ef2e215 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -83,11 +83,10 @@ public UnsafeKVExternalSorter(
         /* initialSize */ 4096,
         pageSizeBytes);
     } else {
-      // The memory needed for UnsafeInMemorySorter should be less than longArray in map.
-      map.freeArray();
-      // The memory used by UnsafeInMemorySorter will be counted later (end of this block)
+      // During spilling, the array in map will not be used, so we can borrow that and use it
+      // as the underline array for in-memory sorter (it's always large enough).
       final UnsafeInMemorySorter inMemSorter = new UnsafeInMemorySorter(
-        taskMemoryManager, recordComparator, prefixComparator, Math.max(1, map.numElements()));
+        taskMemoryManager, recordComparator, prefixComparator, map.getArray());
 
       // We cannot use the destructive iterator here because we are reusing the existing memory
       // pages in BytesToBytesMap to hold records during sorting.
@@ -123,10 +122,9 @@ public UnsafeKVExternalSorter(
         pageSizeBytes,
         inMemSorter);
 
-      sorter.spill();
-      map.free();
-      // counting the memory used UnsafeInMemorySorter
-      taskMemoryManager.acquireExecutionMemory(inMemSorter.getMemoryUsage(), sorter);
+      // reset the map, so we can re-use it to insert new records. the inMemSorter will not used
+      // anymore, so the underline array could be used by map again.
+      map.reset();
     }
   }
 
@@ -142,6 +140,15 @@ public void insertKV(UnsafeRow key, UnsafeRow value) throws IOException {
       value.getBaseObject(), value.getBaseOffset(), value.getSizeInBytes(), prefix);
   }
 
+  /**
+   * Merges another UnsafeKVExternalSorter into `this`, the other one will be emptied.
+   *
+   * @throws IOException
+   */
+  public void merge(UnsafeKVExternalSorter other) throws IOException {
+    sorter.merge(other.sorter);
+  }
+
   /**
    * Returns a sorted iterator. It is the caller's responsibility to call `cleanupResources()`
    * after consuming this iterator.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index 713a4db0cd59..ce8d592c368e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -34,14 +34,18 @@ import org.apache.spark.sql.types.StructType
  *
  * This iterator first uses hash-based aggregation to process input rows. It uses
  * a hash map to store groups and their corresponding aggregation buffers. If we
- * this map cannot allocate memory from memory manager,
- * it switches to sort-based aggregation. The process of the switch has the following step:
+ * this map cannot allocate memory from memory manager, it spill the map into disk
+ * and create a new one. After processed all the input, then merge all the spills
+ * together using external sorter, and do sort-based aggregation.
+ *
+ * The process has the following step:
+ *  - Step 0: Do hash-based aggregation.
  *  - Step 1: Sort all entries of the hash map based on values of grouping expressions and
  *            spill them to disk.
- *  - Step 2: Create a external sorter based on the spilled sorted map entries.
- *  - Step 3: Redirect all input rows to the external sorter.
- *  - Step 4: Get a sorted [[KVIterator]] from the external sorter.
- *  - Step 5: Initialize sort-based aggregation.
+ *  - Step 2: Create a external sorter based on the spilled sorted map entries and reset the map.
+ *  - Step 3: Get a sorted [[KVIterator]] from the external sorter.
+ *  - Step 4: Repeat step 0 until no more input.
+ *  - Step 5: Initialize sort-based aggregation on the sorted iterator.
  * Then, this iterator works in the way of sort-based aggregation.
  *
  * The code of this class is organized as follows:
@@ -488,9 +492,10 @@ class TungstenAggregationIterator(
 
   // The function used to read and process input rows. When processing input rows,
   // it first uses hash-based aggregation by putting groups and their buffers in
-  // hashMap. If we could not allocate more memory for the map, we switch to
-  // sort-based aggregation (by calling switchToSortBasedAggregation).
-  private def processInputs(): Unit = {
+  // hashMap. If there is not enough memory, it will multiple hash-maps, spilling
+  // after each becomes full then using sort to merge these spills, finally do sort
+  // based aggregation.
+  private def processInputs(fallbackStartsAt: Int): Unit = {
     if (groupingExpressions.isEmpty) {
       // If there is no grouping expressions, we can just reuse the same buffer over and over again.
       // Note that it would be better to eliminate the hash map entirely in the future.
@@ -502,44 +507,40 @@ class TungstenAggregationIterator(
         processRow(buffer, newInput)
       }
     } else {
-      while (!sortBased && inputIter.hasNext) {
+      var i = 0
+      while (inputIter.hasNext) {
         val newInput = inputIter.next()
         numInputRows += 1
         val groupingKey = groupProjection.apply(newInput)
-        val buffer: UnsafeRow = hashMap.getAggregationBufferFromUnsafeRow(groupingKey)
+        var buffer: UnsafeRow = null
+        if (i < fallbackStartsAt) {
+          buffer = hashMap.getAggregationBufferFromUnsafeRow(groupingKey)
+        }
         if (buffer == null) {
-          // buffer == null means that we could not allocate more memory.
-          // Now, we need to spill the map and switch to sort-based aggregation.
-          switchToSortBasedAggregation(groupingKey, newInput)
-        } else {
-          processRow(buffer, newInput)
+          val sorter = hashMap.destructAndCreateExternalSorter()
+          if (externalSorter == null) {
+            externalSorter = sorter
+          } else {
+            externalSorter.merge(sorter)
+          }
+          i = 0
+          buffer = hashMap.getAggregationBufferFromUnsafeRow(groupingKey)
+          if (buffer == null) {
+            // failed to allocate the first page
+            throw new OutOfMemoryError("No enough memory for aggregation")
+          }
         }
+        processRow(buffer, newInput)
+        i += 1
       }
-    }
-  }
 
-  // This function is only used for testing. It basically the same as processInputs except
-  // that it switch to sort-based aggregation after `fallbackStartsAt` input rows have
-  // been processed.
-  private def processInputsWithControlledFallback(fallbackStartsAt: Int): Unit = {
-    var i = 0
-    while (!sortBased && inputIter.hasNext) {
-      val newInput = inputIter.next()
-      numInputRows += 1
-      val groupingKey = groupProjection.apply(newInput)
-      val buffer: UnsafeRow = if (i < fallbackStartsAt) {
-        hashMap.getAggregationBufferFromUnsafeRow(groupingKey)
-      } else {
-        null
-      }
-      if (buffer == null) {
-        // buffer == null means that we could not allocate more memory.
-        // Now, we need to spill the map and switch to sort-based aggregation.
-        switchToSortBasedAggregation(groupingKey, newInput)
-      } else {
-        processRow(buffer, newInput)
+      if (externalSorter != null) {
+        val sorter = hashMap.destructAndCreateExternalSorter()
+        externalSorter.merge(sorter)
+        hashMap.free()
+
+        switchToSortBasedAggregation()
       }
-      i += 1
     }
   }
 
@@ -561,88 +562,8 @@ class TungstenAggregationIterator(
   /**
    * Switch to sort-based aggregation when the hash-based approach is unable to acquire memory.
    */
-  private def switchToSortBasedAggregation(firstKey: UnsafeRow, firstInput: InternalRow): Unit = {
+  private def switchToSortBasedAggregation(): Unit = {
     logInfo("falling back to sort based aggregation.")
-    // Step 1: Get the ExternalSorter containing sorted entries of the map.
-    externalSorter = hashMap.destructAndCreateExternalSorter()
-
-    // Step 2: If we have aggregate function with mode Partial or Complete,
-    // we need to process input rows to get aggregation buffer.
-    // So, later in the sort-based aggregation iterator, we can do merge.
-    // If aggregate functions are with mode Final and PartialMerge,
-    // we just need to project the aggregation buffer from an input row.
-    val needsProcess = aggregationMode match {
-      case (Some(Partial), None) => true
-      case (None, Some(Complete)) => true
-      case (Some(Final), Some(Complete)) => true
-      case _ => false
-    }
-
-    // Note: Since we spill the sorter's contents immediately after creating it, we must insert
-    // something into the sorter here to ensure that we acquire at least a page of memory.
-    // This is done through `externalSorter.insertKV`, which will trigger the page allocation.
-    // Otherwise, children operators may steal the window of opportunity and starve our sorter.
-
-    if (needsProcess) {
-      // First, we create a buffer.
-      val buffer = createNewAggregationBuffer()
-
-      // Process firstKey and firstInput.
-      // Initialize buffer.
-      buffer.copyFrom(initialAggregationBuffer)
-      processRow(buffer, firstInput)
-      externalSorter.insertKV(firstKey, buffer)
-
-      // Process the rest of input rows.
-      while (inputIter.hasNext) {
-        val newInput = inputIter.next()
-        numInputRows += 1
-        val groupingKey = groupProjection.apply(newInput)
-        buffer.copyFrom(initialAggregationBuffer)
-        processRow(buffer, newInput)
-        externalSorter.insertKV(groupingKey, buffer)
-      }
-    } else {
-      // When needsProcess is false, the format of input rows is groupingKey + aggregation buffer.
-      // We need to project the aggregation buffer part from an input row.
-      val buffer = createNewAggregationBuffer()
-      // In principle, we could use `allAggregateFunctions.flatMap(_.inputAggBufferAttributes)` to
-      // extract the aggregation buffer. In practice, however, we extract it positionally by relying
-      // on it being present at the end of the row. The reason for this relates to how the different
-      // aggregates handle input binding.
-      //
-      // ImperativeAggregate uses field numbers and field number offsets to manipulate its buffers,
-      // so its correctness does not rely on attribute bindings. When we fall back to sort-based
-      // aggregation, these field number offsets (mutableAggBufferOffset and inputAggBufferOffset)
-      // need to be updated and any internal state in the aggregate functions themselves must be
-      // reset, so we call withNewMutableAggBufferOffset and withNewInputAggBufferOffset to reset
-      // this state and update the offsets.
-      //
-      // The updated ImperativeAggregate will have different attribute ids for its
-      // aggBufferAttributes and inputAggBufferAttributes. This isn't a problem for the actual
-      // ImperativeAggregate evaluation, but it means that
-      // `allAggregateFunctions.flatMap(_.inputAggBufferAttributes)` will no longer match the
-      // attributes in `originalInputAttributes`, which is why we can't use those attributes here.
-      //
-      // For more details, see the discussion on PR #9038.
-      val bufferExtractor = newMutableProjection(
-        originalInputAttributes.drop(initialInputBufferOffset),
-        originalInputAttributes)()
-      bufferExtractor.target(buffer)
-
-      // Insert firstKey and its buffer.
-      bufferExtractor(firstInput)
-      externalSorter.insertKV(firstKey, buffer)
-
-      // Insert the rest of input rows.
-      while (inputIter.hasNext) {
-        val newInput = inputIter.next()
-        numInputRows += 1
-        val groupingKey = groupProjection.apply(newInput)
-        bufferExtractor(newInput)
-        externalSorter.insertKV(groupingKey, buffer)
-      }
-    }
 
     // Set aggregationMode, processRow, and generateOutput for sort-based aggregation.
     val newAggregationMode = aggregationMode match {
@@ -762,15 +683,7 @@ class TungstenAggregationIterator(
   /**
    * Start processing input rows.
    */
-  testFallbackStartsAt match {
-    case None =>
-      processInputs()
-    case Some(fallbackStartsAt) =>
-      // This is the testing path. processInputsWithControlledFallback is same as processInputs
-      // except that it switches to sort-based aggregation after `fallbackStartsAt` input rows
-      // have been processed.
-      processInputsWithControlledFallback(fallbackStartsAt)
-  }
+  processInputs(testFallbackStartsAt.getOrElse(Int.MaxValue))
 
   // If we did not switch to sort-based aggregation in processInputs,
   // we pre-load the first key-value pair from the map (to make hasNext idempotent).
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
index a38623623a44..7ceaee38d131 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMapSuite.scala
@@ -170,9 +170,6 @@ class UnsafeFixedWidthAggregationMapSuite
   }
 
   testWithMemoryLeakDetection("test external sorting") {
-    // Memory consumption in the beginning of the task.
-    val initialMemoryConsumption = taskMemoryManager.getMemoryConsumptionForThisTask()
-
     val map = new UnsafeFixedWidthAggregationMap(
       emptyAggregationBuffer,
       aggBufferSchema,
@@ -189,35 +186,33 @@ class UnsafeFixedWidthAggregationMapSuite
       buf.setInt(0, keyString.length)
       assert(buf != null)
     }
-
-    // Convert the map into a sorter
     val sorter = map.destructAndCreateExternalSorter()
 
     // Add more keys to the sorter and make sure the results come out sorted.
     val additionalKeys = randomStrings(1024)
-    val keyConverter = UnsafeProjection.create(groupKeySchema)
-    val valueConverter = UnsafeProjection.create(aggBufferSchema)
-
     additionalKeys.zipWithIndex.foreach { case (str, i) =>
-      val k = InternalRow(UTF8String.fromString(str))
-      val v = InternalRow(str.length)
-      sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
+      val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
+      buf.setInt(0, str.length)
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemoryOnce()
-        sorter.closeCurrentPage()
+        val sorter2 = map.destructAndCreateExternalSorter()
+        sorter.merge(sorter2)
       }
     }
+    val sorter2 = map.destructAndCreateExternalSorter()
+    sorter.merge(sorter2)
 
     val out = new scala.collection.mutable.ArrayBuffer[String]
     val iter = sorter.sortedIterator()
     while (iter.next()) {
-      assert(iter.getKey.getString(0).length === iter.getValue.getInt(0))
-      out += iter.getKey.getString(0)
+      // At here, we also test if copy is correct.
+      val key = iter.getKey.copy()
+      val value = iter.getValue.copy()
+      assert(key.getString(0).length === value.getInt(0))
+      out += key.getString(0)
     }
 
     assert(out === (keys ++ additionalKeys).sorted)
-
     map.free()
   }
 
@@ -232,25 +227,21 @@ class UnsafeFixedWidthAggregationMapSuite
       PAGE_SIZE_BYTES,
       false // disable perf metrics
     )
-
-    // Convert the map into a sorter
     val sorter = map.destructAndCreateExternalSorter()
 
     // Add more keys to the sorter and make sure the results come out sorted.
     val additionalKeys = randomStrings(1024)
-    val keyConverter = UnsafeProjection.create(groupKeySchema)
-    val valueConverter = UnsafeProjection.create(aggBufferSchema)
-
     additionalKeys.zipWithIndex.foreach { case (str, i) =>
-      val k = InternalRow(UTF8String.fromString(str))
-      val v = InternalRow(str.length)
-      sorter.insertKV(keyConverter.apply(k), valueConverter.apply(v))
+      val buf = map.getAggregationBuffer(InternalRow(UTF8String.fromString(str)))
+      buf.setInt(0, str.length)
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemoryOnce()
-        sorter.closeCurrentPage()
+        val sorter2 = map.destructAndCreateExternalSorter()
+        sorter.merge(sorter2)
       }
     }
+    val sorter2 = map.destructAndCreateExternalSorter()
+    sorter.merge(sorter2)
 
     val out = new scala.collection.mutable.ArrayBuffer[String]
     val iter = sorter.sortedIterator()
@@ -262,16 +253,12 @@ class UnsafeFixedWidthAggregationMapSuite
       out += key.getString(0)
     }
 
-    assert(out === (additionalKeys).sorted)
-
+    assert(out === additionalKeys.sorted)
     map.free()
   }
 
   testWithMemoryLeakDetection("test external sorting with empty records") {
 
-    // Memory consumption in the beginning of the task.
-    val initialMemoryConsumption = taskMemoryManager.getMemoryConsumptionForThisTask()
-
     val map = new UnsafeFixedWidthAggregationMap(
       emptyAggregationBuffer,
       StructType(Nil),
@@ -281,7 +268,6 @@ class UnsafeFixedWidthAggregationMapSuite
       PAGE_SIZE_BYTES,
       false // disable perf metrics
     )
-
     (1 to 10).foreach { i =>
       val buf = map.getAggregationBuffer(UnsafeRow.createFromByteArray(0, 0))
       assert(buf != null)
@@ -292,13 +278,15 @@ class UnsafeFixedWidthAggregationMapSuite
 
     // Add more keys to the sorter and make sure the results come out sorted.
     (1 to 4096).foreach { i =>
-      sorter.insertKV(UnsafeRow.createFromByteArray(0, 0), UnsafeRow.createFromByteArray(0, 0))
+      map.getAggregationBufferFromUnsafeRow(UnsafeRow.createFromByteArray(0, 0))
 
       if ((i % 100) == 0) {
-        memoryManager.markExecutionAsOutOfMemoryOnce()
-        sorter.closeCurrentPage()
+        val sorter2 = map.destructAndCreateExternalSorter()
+        sorter.merge(sorter2)
       }
     }
+    val sorter2 = map.destructAndCreateExternalSorter()
+    sorter.merge(sorter2)
 
     var count = 0
     val iter = sorter.sortedIterator()
@@ -309,9 +297,8 @@ class UnsafeFixedWidthAggregationMapSuite
       count += 1
     }
 
-    // 1 record was from the map and 4096 records were explicitly inserted.
-    assert(count === 4097)
-
+    // 1 record per map, spilled 42 times.
+    assert(count === 42)
     map.free()
   }
 
@@ -345,6 +332,7 @@ class UnsafeFixedWidthAggregationMapSuite
     var sorter: UnsafeKVExternalSorter = null
     try {
       sorter = map.destructAndCreateExternalSorter()
+      map.free()
     } finally {
       if (sorter != null) {
         sorter.cleanupResources()
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 74061db0f28a..ea80060e370e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -22,13 +22,12 @@ import scala.collection.JavaConverters._
 import org.apache.spark.SparkException
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.expressions.UnsafeRow
-import org.apache.spark.sql.execution.aggregate
 import org.apache.spark.sql.expressions.{MutableAggregationBuffer, UserDefinedAggregateFunction}
 import org.apache.spark.sql.functions._
-import org.apache.spark.sql.test.SQLTestUtils
-import org.apache.spark.sql.types._
 import org.apache.spark.sql.hive.aggregate.{MyDoubleAvg, MyDoubleSum}
 import org.apache.spark.sql.hive.test.TestHiveSingleton
+import org.apache.spark.sql.test.SQLTestUtils
+import org.apache.spark.sql.types._
 
 class ScalaAggregateFunction(schema: StructType) extends UserDefinedAggregateFunction {
 
@@ -702,6 +701,13 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
     }
   }
 
+  test("no aggregation function (SPARK-11486)") {
+    val df = sqlContext.range(20).selectExpr("id", "repeat(id, 1) as s")
+      .groupBy("s").count()
+      .groupBy().count()
+    checkAnswer(df, Row(20) :: Nil)
+  }
+
   test("udaf with all data types") {
     val struct =
       StructType(

From 6f81eae24f83df51a99d4bb2629dd7daadc01519 Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Thu, 5 Nov 2015 09:08:53 +0000
Subject: [PATCH 503/896] [SPARK-11440][CORE][STREAMING][BUILD] Declare rest of
 @Experimental items non-experimental if they've existed since 1.2.0

Remove `Experimental` annotations in core, streaming for items that existed in 1.2.0 or before. The changes are:

* SparkContext
  * binary{Files,Records} : 1.2.0
  * submitJob : 1.0.0
* JavaSparkContext
  * binary{Files,Records} : 1.2.0
* DoubleRDDFunctions, JavaDoubleRDD
  * {mean,sum}Approx : 1.0.0
* PairRDDFunctions, JavaPairRDD
  * sampleByKeyExact : 1.2.0
  * countByKeyApprox : 1.0.0
* PairRDDFunctions
  * countApproxDistinctByKey : 1.1.0
* RDD
  * countApprox, countByValueApprox, countApproxDistinct : 1.0.0
* JavaRDDLike
  * countApprox : 1.0.0
* PythonHadoopUtil.Converter : 1.1.0
* PortableDataStream : 1.2.0 (related to binaryFiles)
* BoundedDouble : 1.0.0
* PartialResult : 1.0.0
* StreamingContext, JavaStreamingContext
  * binaryRecordsStream : 1.2.0
* HiveContext
  * analyze : 1.2.0

Author: Sean Owen <sowen@cloudera.com>

Closes #9396 from srowen/SPARK-11440.
---
 .../src/main/scala/org/apache/spark/SparkContext.scala | 10 +---------
 .../org/apache/spark/api/java/JavaDoubleRDD.scala      |  7 -------
 .../scala/org/apache/spark/api/java/JavaPairRDD.scala  |  9 ---------
 .../scala/org/apache/spark/api/java/JavaRDDLike.scala  |  5 -----
 .../org/apache/spark/api/java/JavaSparkContext.scala   |  7 -------
 .../org/apache/spark/api/python/PythonHadoopUtil.scala |  3 ---
 .../org/apache/spark/input/PortableDataStream.scala    |  2 --
 .../scala/org/apache/spark/partial/BoundedDouble.scala |  4 ----
 .../scala/org/apache/spark/partial/PartialResult.scala |  3 ---
 .../org/apache/spark/rdd/DoubleRDDFunctions.scala      |  4 ----
 .../scala/org/apache/spark/rdd/PairRDDFunctions.scala  |  7 -------
 core/src/main/scala/org/apache/spark/rdd/RDD.scala     |  8 +-------
 .../scala/org/apache/spark/sql/hive/HiveContext.scala  |  2 --
 .../org/apache/spark/streaming/StreamingContext.scala  |  3 ---
 .../streaming/api/java/JavaStreamingContext.scala      |  3 ---
 15 files changed, 2 insertions(+), 75 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index a6857b4c7d88..7421821e2601 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -45,7 +45,7 @@ import org.apache.hadoop.mapreduce.lib.input.{FileInputFormat => NewFileInputFor
 
 import org.apache.mesos.MesosNativeLibrary
 
-import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.deploy.{LocalSparkCluster, SparkHadoopUtil}
 import org.apache.spark.executor.{ExecutorEndpoint, TriggerThreadDump}
@@ -870,8 +870,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * :: Experimental ::
-   *
    * Get an RDD for a Hadoop-readable dataset as PortableDataStream for each file
    * (useful for binary data)
    *
@@ -902,7 +900,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    *             list of inputs.
    * @param minPartitions A suggestion value of the minimal splitting number for input data.
    */
-  @Experimental
   def binaryFiles(
       path: String,
       minPartitions: Int = defaultMinPartitions): RDD[(String, PortableDataStream)] = withScope {
@@ -922,8 +919,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * :: Experimental ::
-   *
    * Load data from a flat binary file, assuming the length of each record is constant.
    *
    * '''Note:''' We ensure that the byte array for each record in the resulting RDD
@@ -936,7 +931,6 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    *
    * @return An RDD of data with values, represented as byte arrays
    */
-  @Experimental
   def binaryRecords(
       path: String,
       recordLength: Int,
@@ -1963,10 +1957,8 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   }
 
   /**
-   * :: Experimental ::
    * Submit a job for execution and return a FutureJob holding the result.
    */
-  @Experimental
   def submitJob[T, U, R](
       rdd: RDD[T],
       processPartition: Iterator[T] => U,
diff --git a/core/src/main/scala/org/apache/spark/api/java/JavaDoubleRDD.scala b/core/src/main/scala/org/apache/spark/api/java/JavaDoubleRDD.scala
index a650df605b92..c32aefac465b 100644
--- a/core/src/main/scala/org/apache/spark/api/java/JavaDoubleRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/java/JavaDoubleRDD.scala
@@ -24,7 +24,6 @@ import scala.reflect.ClassTag
 
 import org.apache.spark.Partitioner
 import org.apache.spark.SparkContext.doubleRDDToDoubleRDDFunctions
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function.{Function => JFunction}
 import org.apache.spark.partial.{BoundedDouble, PartialResult}
 import org.apache.spark.rdd.RDD
@@ -209,25 +208,19 @@ class JavaDoubleRDD(val srdd: RDD[scala.Double])
     srdd.meanApprox(timeout, confidence)
 
   /**
-   * :: Experimental ::
    * Approximate operation to return the mean within a timeout.
    */
-  @Experimental
   def meanApprox(timeout: Long): PartialResult[BoundedDouble] = srdd.meanApprox(timeout)
 
   /**
-   * :: Experimental ::
    * Approximate operation to return the sum within a timeout.
    */
-  @Experimental
   def sumApprox(timeout: Long, confidence: JDouble): PartialResult[BoundedDouble] =
     srdd.sumApprox(timeout, confidence)
 
   /**
-   * :: Experimental ::
    * Approximate operation to return the sum within a timeout.
    */
-  @Experimental
   def sumApprox(timeout: Long): PartialResult[BoundedDouble] = srdd.sumApprox(timeout)
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala b/core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala
index 8344f6368ac4..0b0c6e5bb8cc 100644
--- a/core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/java/JavaPairRDD.scala
@@ -32,7 +32,6 @@ import org.apache.hadoop.mapreduce.{OutputFormat => NewOutputFormat}
 
 import org.apache.spark.{HashPartitioner, Partitioner}
 import org.apache.spark.Partitioner._
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.api.java.JavaUtils.mapAsSerializableJavaMap
 import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2, PairFunction}
@@ -159,7 +158,6 @@ class JavaPairRDD[K, V](val rdd: RDD[(K, V)])
     sampleByKey(withReplacement, fractions, Utils.random.nextLong)
 
   /**
-   * ::Experimental::
    * Return a subset of this RDD sampled by key (via stratified sampling) containing exactly
    * math.ceil(numItems * samplingRate) for each stratum (group of pairs with the same key).
    *
@@ -169,14 +167,12 @@ class JavaPairRDD[K, V](val rdd: RDD[(K, V)])
    * additional pass over the RDD to guarantee sample size; when sampling with replacement, we need
    * two additional passes.
    */
-  @Experimental
   def sampleByKeyExact(withReplacement: Boolean,
       fractions: JMap[K, Double],
       seed: Long): JavaPairRDD[K, V] =
     new JavaPairRDD[K, V](rdd.sampleByKeyExact(withReplacement, fractions.asScala, seed))
 
   /**
-   * ::Experimental::
    * Return a subset of this RDD sampled by key (via stratified sampling) containing exactly
    * math.ceil(numItems * samplingRate) for each stratum (group of pairs with the same key).
    *
@@ -188,7 +184,6 @@ class JavaPairRDD[K, V](val rdd: RDD[(K, V)])
    *
    * Use Utils.random.nextLong as the default seed for the random number generator.
    */
-  @Experimental
   def sampleByKeyExact(withReplacement: Boolean, fractions: JMap[K, Double]): JavaPairRDD[K, V] =
     sampleByKeyExact(withReplacement, fractions, Utils.random.nextLong)
 
@@ -300,20 +295,16 @@ class JavaPairRDD[K, V](val rdd: RDD[(K, V)])
   def countByKey(): java.util.Map[K, Long] = mapAsSerializableJavaMap(rdd.countByKey())
 
   /**
-   * :: Experimental ::
    * Approximate version of countByKey that can return a partial result if it does
    * not finish within a timeout.
    */
-  @Experimental
   def countByKeyApprox(timeout: Long): PartialResult[java.util.Map[K, BoundedDouble]] =
     rdd.countByKeyApprox(timeout).map(mapAsSerializableJavaMap)
 
   /**
-   * :: Experimental ::
    * Approximate version of countByKey that can return a partial result if it does
    * not finish within a timeout.
    */
-  @Experimental
   def countByKeyApprox(timeout: Long, confidence: Double = 0.95)
   : PartialResult[java.util.Map[K, BoundedDouble]] =
     rdd.countByKeyApprox(timeout, confidence).map(mapAsSerializableJavaMap)
diff --git a/core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala b/core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala
index fc817cdd6a3f..871be0b1f39e 100644
--- a/core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala
+++ b/core/src/main/scala/org/apache/spark/api/java/JavaRDDLike.scala
@@ -28,7 +28,6 @@ import com.google.common.base.Optional
 import org.apache.hadoop.io.compress.CompressionCodec
 
 import org.apache.spark._
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaPairRDD._
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.api.java.JavaUtils.mapAsSerializableJavaMap
@@ -436,20 +435,16 @@ trait JavaRDDLike[T, This <: JavaRDDLike[T, This]] extends Serializable {
   def count(): Long = rdd.count()
 
   /**
-   * :: Experimental ::
    * Approximate version of count() that returns a potentially incomplete result
    * within a timeout, even if not all tasks have finished.
    */
-  @Experimental
   def countApprox(timeout: Long, confidence: Double): PartialResult[BoundedDouble] =
     rdd.countApprox(timeout, confidence)
 
   /**
-   * :: Experimental ::
    * Approximate version of count() that returns a potentially incomplete result
    * within a timeout, even if not all tasks have finished.
    */
-  @Experimental
   def countApprox(timeout: Long): PartialResult[BoundedDouble] =
     rdd.countApprox(timeout)
 
diff --git a/core/src/main/scala/org/apache/spark/api/java/JavaSparkContext.scala b/core/src/main/scala/org/apache/spark/api/java/JavaSparkContext.scala
index 609496ccdfef..4f54cd69e217 100644
--- a/core/src/main/scala/org/apache/spark/api/java/JavaSparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/api/java/JavaSparkContext.scala
@@ -33,7 +33,6 @@ import org.apache.hadoop.mapreduce.{InputFormat => NewInputFormat}
 
 import org.apache.spark._
 import org.apache.spark.AccumulatorParam._
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.{EmptyRDD, HadoopRDD, NewHadoopRDD, RDD}
@@ -266,8 +265,6 @@ class JavaSparkContext(val sc: SparkContext)
     new JavaPairRDD(sc.binaryFiles(path, minPartitions))
 
   /**
-   * :: Experimental ::
-   *
    * Read a directory of binary files from HDFS, a local file system (available on all nodes),
    * or any Hadoop-supported file system URI as a byte array. Each file is read as a single
    * record and returned in a key-value pair, where the key is the path of each file,
@@ -294,19 +291,15 @@ class JavaSparkContext(val sc: SparkContext)
    *
    * @note Small files are preferred; very large files but may cause bad performance.
    */
-  @Experimental
   def binaryFiles(path: String): JavaPairRDD[String, PortableDataStream] =
     new JavaPairRDD(sc.binaryFiles(path, defaultMinPartitions))
 
   /**
-   * :: Experimental ::
-   *
    * Load data from a flat binary file, assuming the length of each record is constant.
    *
    * @param path Directory to the input data files
    * @return An RDD of data with values, represented as byte arrays
    */
-  @Experimental
   def binaryRecords(path: String, recordLength: Int): JavaRDD[Array[Byte]] = {
     new JavaRDD(sc.binaryRecords(path, recordLength))
   }
diff --git a/core/src/main/scala/org/apache/spark/api/python/PythonHadoopUtil.scala b/core/src/main/scala/org/apache/spark/api/python/PythonHadoopUtil.scala
index a7dfa1d257cf..d2beef2a0dd4 100644
--- a/core/src/main/scala/org/apache/spark/api/python/PythonHadoopUtil.scala
+++ b/core/src/main/scala/org/apache/spark/api/python/PythonHadoopUtil.scala
@@ -24,17 +24,14 @@ import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.io._
 
 import org.apache.spark.{Logging, SparkException}
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.rdd.RDD
 import org.apache.spark.util.{SerializableConfiguration, Utils}
 
 /**
- * :: Experimental ::
  * A trait for use with reading custom classes in PySpark. Implement this trait and add custom
  * transformation code by overriding the convert method.
  */
-@Experimental
 trait Converter[T, + U] extends Serializable {
   def convert(obj: T): U
 }
diff --git a/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala b/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
index e2ffc3b64e5d..33e4ee021581 100644
--- a/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
+++ b/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
@@ -27,7 +27,6 @@ import org.apache.hadoop.fs.Path
 import org.apache.hadoop.mapreduce.{InputSplit, JobContext, RecordReader, TaskAttemptContext}
 import org.apache.hadoop.mapreduce.lib.input.{CombineFileInputFormat, CombineFileRecordReader, CombineFileSplit}
 
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.deploy.SparkHadoopUtil
 
 /**
@@ -129,7 +128,6 @@ private[spark] class StreamInputFormat extends StreamFileInputFormat[PortableDat
  * @note TaskAttemptContext is not serializable resulting in the confBytes construct
  * @note CombineFileSplit is not serializable resulting in the splitBytes construct
  */
-@Experimental
 class PortableDataStream(
     isplit: CombineFileSplit,
     context: TaskAttemptContext,
diff --git a/core/src/main/scala/org/apache/spark/partial/BoundedDouble.scala b/core/src/main/scala/org/apache/spark/partial/BoundedDouble.scala
index aed035334442..48b943415317 100644
--- a/core/src/main/scala/org/apache/spark/partial/BoundedDouble.scala
+++ b/core/src/main/scala/org/apache/spark/partial/BoundedDouble.scala
@@ -17,13 +17,9 @@
 
 package org.apache.spark.partial
 
-import org.apache.spark.annotation.Experimental
-
 /**
- * :: Experimental ::
  * A Double value with error bars and associated confidence.
  */
-@Experimental
 class BoundedDouble(val mean: Double, val confidence: Double, val low: Double, val high: Double) {
   override def toString(): String = "[%.3f, %.3f]".format(low, high)
 }
diff --git a/core/src/main/scala/org/apache/spark/partial/PartialResult.scala b/core/src/main/scala/org/apache/spark/partial/PartialResult.scala
index 53c4b32c95ab..25cb7490aa9c 100644
--- a/core/src/main/scala/org/apache/spark/partial/PartialResult.scala
+++ b/core/src/main/scala/org/apache/spark/partial/PartialResult.scala
@@ -17,9 +17,6 @@
 
 package org.apache.spark.partial
 
-import org.apache.spark.annotation.Experimental
-
-@Experimental
 class PartialResult[R](initialVal: R, isFinal: Boolean) {
   private var finalValue: Option[R] = if (isFinal) Some(initialVal) else None
   private var failure: Option[Exception] = None
diff --git a/core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala b/core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala
index 926bce6f15a2..7fbaadcea3a3 100644
--- a/core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala
@@ -74,10 +74,8 @@ class DoubleRDDFunctions(self: RDD[Double]) extends Logging with Serializable {
   }
 
   /**
-   * :: Experimental ::
    * Approximate operation to return the mean within a timeout.
    */
-  @Experimental
   def meanApprox(
       timeout: Long,
       confidence: Double = 0.95): PartialResult[BoundedDouble] = self.withScope {
@@ -87,10 +85,8 @@ class DoubleRDDFunctions(self: RDD[Double]) extends Logging with Serializable {
   }
 
   /**
-   * :: Experimental ::
    * Approximate operation to return the sum within a timeout.
    */
-  @Experimental
   def sumApprox(
       timeout: Long,
       confidence: Double = 0.95): PartialResult[BoundedDouble] = self.withScope {
diff --git a/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala b/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
index a981b63942e6..c6181902ace6 100644
--- a/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/PairRDDFunctions.scala
@@ -274,7 +274,6 @@ class PairRDDFunctions[K, V](self: RDD[(K, V)])
   }
 
   /**
-   * ::Experimental::
    * Return a subset of this RDD sampled by key (via stratified sampling) containing exactly
    * math.ceil(numItems * samplingRate) for each stratum (group of pairs with the same key).
    *
@@ -289,7 +288,6 @@ class PairRDDFunctions[K, V](self: RDD[(K, V)])
    * @param seed seed for the random number generator
    * @return RDD containing the sampled subset
    */
-  @Experimental
   def sampleByKeyExact(
       withReplacement: Boolean,
       fractions: Map[K, Double],
@@ -384,19 +382,15 @@ class PairRDDFunctions[K, V](self: RDD[(K, V)])
   }
 
   /**
-   * :: Experimental ::
    * Approximate version of countByKey that can return a partial result if it does
    * not finish within a timeout.
    */
-  @Experimental
   def countByKeyApprox(timeout: Long, confidence: Double = 0.95)
       : PartialResult[Map[K, BoundedDouble]] = self.withScope {
     self.map(_._1).countByValueApprox(timeout, confidence)
   }
 
   /**
-   * :: Experimental ::
-   *
    * Return approximate number of distinct values for each key in this RDD.
    *
    * The algorithm used is based on streamlib's implementation of "HyperLogLog in Practice:
@@ -413,7 +407,6 @@ class PairRDDFunctions[K, V](self: RDD[(K, V)])
    *           If `sp` equals 0, the sparse representation is skipped.
    * @param partitioner Partitioner to use for the resulting RDD.
    */
-  @Experimental
   def countApproxDistinctByKey(
       p: Int,
       sp: Int,
diff --git a/core/src/main/scala/org/apache/spark/rdd/RDD.scala b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
index a97bb174438a..800ef53cbef0 100644
--- a/core/src/main/scala/org/apache/spark/rdd/RDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
@@ -31,7 +31,7 @@ import org.apache.hadoop.mapred.TextOutputFormat
 
 import org.apache.spark._
 import org.apache.spark.Partitioner._
-import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.partial.BoundedDouble
 import org.apache.spark.partial.CountEvaluator
@@ -1119,11 +1119,9 @@ abstract class RDD[T: ClassTag](
   def count(): Long = sc.runJob(this, Utils.getIteratorSize _).sum
 
   /**
-   * :: Experimental ::
    * Approximate version of count() that returns a potentially incomplete result
    * within a timeout, even if not all tasks have finished.
    */
-  @Experimental
   def countApprox(
       timeout: Long,
       confidence: Double = 0.95): PartialResult[BoundedDouble] = withScope {
@@ -1152,10 +1150,8 @@ abstract class RDD[T: ClassTag](
   }
 
   /**
-   * :: Experimental ::
    * Approximate version of countByValue().
    */
-  @Experimental
   def countByValueApprox(timeout: Long, confidence: Double = 0.95)
       (implicit ord: Ordering[T] = null)
       : PartialResult[Map[T, BoundedDouble]] = withScope {
@@ -1174,7 +1170,6 @@ abstract class RDD[T: ClassTag](
   }
 
   /**
-   * :: Experimental ::
    * Return approximate number of distinct elements in the RDD.
    *
    * The algorithm used is based on streamlib's implementation of "HyperLogLog in Practice:
@@ -1190,7 +1185,6 @@ abstract class RDD[T: ClassTag](
    * @param sp The precision value for the sparse set, between 0 and 32.
    *           If `sp` equals 0, the sparse representation is skipped.
    */
-  @Experimental
   def countApproxDistinct(p: Int, sp: Int): Long = withScope {
     require(p >= 4, s"p ($p) must be >= 4")
     require(sp <= 32, s"sp ($sp) must be <= 32")
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 1f5135320326..670d6a78e36e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -36,7 +36,6 @@ import org.apache.hadoop.hive.ql.metadata.Table
 import org.apache.hadoop.hive.ql.parse.VariableSubstitution
 import org.apache.hadoop.hive.serde2.io.{DateWritable, TimestampWritable}
 
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaSparkContext
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.SQLConf.SQLConfEntry._
@@ -356,7 +355,6 @@ class HiveContext private[hive](
    *
    * @since 1.2.0
    */
-  @Experimental
   def analyze(tableName: String) {
     val tableIdent = SqlParser.parseTableIdentifier(tableName)
     val relation = EliminateSubQueries(catalog.lookupRelation(tableIdent))
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index 051f53de64cd..97113835f3bd 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -445,8 +445,6 @@ class StreamingContext private[streaming] (
   }
 
   /**
-   * :: Experimental ::
-   *
    * Create an input stream that monitors a Hadoop-compatible filesystem
    * for new files and reads them as flat binary files, assuming a fixed length per record,
    * generating one byte array per record. Files must be written to the monitored directory
@@ -459,7 +457,6 @@ class StreamingContext private[streaming] (
    * @param directory HDFS directory to monitor for new file
    * @param recordLength length of each record in bytes
    */
-  @Experimental
   def binaryRecordsStream(
       directory: String,
       recordLength: Int): DStream[Array[Byte]] = withNamedScope("binary records stream") {
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala
index 13f371f29603..8f21c79a760c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingContext.scala
@@ -222,8 +222,6 @@ class JavaStreamingContext(val ssc: StreamingContext) extends Closeable {
   }
 
   /**
-   * :: Experimental ::
-   *
    * Create an input stream that monitors a Hadoop-compatible filesystem
    * for new files and reads them as flat binary files with fixed record lengths,
    * yielding byte arrays
@@ -234,7 +232,6 @@ class JavaStreamingContext(val ssc: StreamingContext) extends Closeable {
    * @param directory HDFS directory to monitor for new files
    * @param recordLength The length at which to split the records
    */
-  @Experimental
   def binaryRecordsStream(directory: String, recordLength: Int): JavaDStream[Array[Byte]] = {
     ssc.binaryRecordsStream(directory, recordLength)
   }

From 859dff56eb0f8c63c86e7e900a12340c199e6247 Mon Sep 17 00:00:00 2001
From: Nick Evans <me@nicolasevans.org>
Date: Thu, 5 Nov 2015 09:18:20 +0000
Subject: [PATCH 504/896] [SPARK-11378][STREAMING] make
 StreamingContext.awaitTerminationOrTimeout return properly

This adds a failing test checking that `awaitTerminationOrTimeout` returns the expected value, and then fixes that failing test with the addition of a `return`.

tdas zsxwing

Author: Nick Evans <me@nicolasevans.org>

Closes #9336 from manygrams/fix_await_termination_or_timeout.
---
 python/pyspark/streaming/context.py | 2 +-
 python/pyspark/streaming/tests.py   | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/streaming/context.py b/python/pyspark/streaming/context.py
index 975c75473214..8be56c991526 100644
--- a/python/pyspark/streaming/context.py
+++ b/python/pyspark/streaming/context.py
@@ -218,7 +218,7 @@ def awaitTerminationOrTimeout(self, timeout):
 
         @param timeout: time to wait in seconds
         """
-        self._jssc.awaitTerminationOrTimeout(int(timeout * 1000))
+        return self._jssc.awaitTerminationOrTimeout(int(timeout * 1000))
 
     def stop(self, stopSparkContext=True, stopGraceFully=False):
         """
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index f7fa481d5023..179479625bca 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -596,6 +596,13 @@ def setupFunc():
         self.ssc = StreamingContext.getActiveOrCreate(None, setupFunc)
         self.assertTrue(self.setupCalled)
 
+    def test_await_termination_or_timeout(self):
+        self._add_input_stream()
+        self.ssc.start()
+        self.assertFalse(self.ssc.awaitTerminationOrTimeout(0.001))
+        self.ssc.stop(False)
+        self.assertTrue(self.ssc.awaitTerminationOrTimeout(0.001))
+
 
 class CheckpointTests(unittest.TestCase):
 

From 7bdc92197cce0edc0110dc9c2158e6e3f42c72ee Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Thu, 5 Nov 2015 09:23:09 +0000
Subject: [PATCH 505/896] [SPARK-11449][CORE] PortableDataStream should be a
 factory

```PortableDataStream``` maintains some internal state. This makes it tricky to reuse a stream (one needs to call ```close``` on both the ```PortableDataStream``` and the ```InputStream``` it produces).

This PR removes all state from ```PortableDataStream``` and effectively turns it into an ```InputStream```/```Array[Byte]``` factory. This makes the user responsible for managing the ```InputStream``` it returns.

cc srowen

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9417 from hvanhovell/SPARK-11449.
---
 .../spark/input/PortableDataStream.scala      | 45 +++++++------------
 1 file changed, 16 insertions(+), 29 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala b/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
index 33e4ee021581..280e7a5fe893 100644
--- a/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
+++ b/core/src/main/scala/org/apache/spark/input/PortableDataStream.scala
@@ -21,7 +21,7 @@ import java.io.{ByteArrayInputStream, ByteArrayOutputStream, DataInputStream, Da
 
 import scala.collection.JavaConverters._
 
-import com.google.common.io.ByteStreams
+import com.google.common.io.{Closeables, ByteStreams}
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
 import org.apache.hadoop.mapreduce.{InputSplit, JobContext, RecordReader, TaskAttemptContext}
@@ -82,7 +82,6 @@ private[spark] abstract class StreamBasedRecordReader[T](
     if (!processed) {
       val fileIn = new PortableDataStream(split, context, index)
       value = parseStream(fileIn)
-      fileIn.close() // if it has not been open yet, close does nothing
       key = fileIn.getPath
       processed = true
       true
@@ -134,12 +133,6 @@ class PortableDataStream(
     index: Integer)
   extends Serializable {
 
-  // transient forces file to be reopened after being serialization
-  // it is also used for non-serializable classes
-
-  @transient private var fileIn: DataInputStream = null
-  @transient private var isOpen = false
-
   private val confBytes = {
     val baos = new ByteArrayOutputStream()
     SparkHadoopUtil.get.getConfigurationFromJobContext(context).
@@ -175,40 +168,34 @@ class PortableDataStream(
   }
 
   /**
-   * Create a new DataInputStream from the split and context
+   * Create a new DataInputStream from the split and context. The user of this method is responsible
+   * for closing the stream after usage.
    */
   def open(): DataInputStream = {
-    if (!isOpen) {
-      val pathp = split.getPath(index)
-      val fs = pathp.getFileSystem(conf)
-      fileIn = fs.open(pathp)
-      isOpen = true
-    }
-    fileIn
+    val pathp = split.getPath(index)
+    val fs = pathp.getFileSystem(conf)
+    fs.open(pathp)
   }
 
   /**
    * Read the file as a byte array
    */
   def toArray(): Array[Byte] = {
-    open()
-    val innerBuffer = ByteStreams.toByteArray(fileIn)
-    close()
-    innerBuffer
+    val stream = open()
+    try {
+      ByteStreams.toByteArray(stream)
+    } finally {
+      Closeables.close(stream, true)
+    }
   }
 
   /**
-   * Close the file (if it is currently open)
+   * Closing the PortableDataStream is not needed anymore. The user either can use the
+   * PortableDataStream to get a DataInputStream (which the user needs to close after usage),
+   * or a byte array.
    */
+  @deprecated("Closing the PortableDataStream is not needed anymore.", "1.6.0")
   def close(): Unit = {
-    if (isOpen) {
-      try {
-        fileIn.close()
-        isOpen = false
-      } catch {
-        case ioe: java.io.IOException => // do nothing
-      }
-    }
   }
 
   def getPath(): String = path

From a94671a027c29bacea37f56b95eccb115638abff Mon Sep 17 00:00:00 2001
From: a1singh <a1singh@ucsd.edu>
Date: Thu, 5 Nov 2015 12:51:10 +0000
Subject: [PATCH 506/896] [SPARK-11506][MLLIB] Removed redundant operation in
 Online LDA implementation

In file LDAOptimizer.scala:

line 441: since "idx" was never used, replaced unrequired zipWithIndex.foreach with foreach.

-      nonEmptyDocs.zipWithIndex.foreach { case ((_, termCounts: Vector), idx: Int) =>
+      nonEmptyDocs.foreach { case (_, termCounts: Vector) =>

Author: a1singh <a1singh@ucsd.edu>

Closes #9456 from a1singh/master.
---
 .../scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
index 38486e949bbc..17c0609800e9 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAOptimizer.scala
@@ -438,7 +438,7 @@ final class OnlineLDAOptimizer extends LDAOptimizer {
 
       val stat = BDM.zeros[Double](k, vocabSize)
       var gammaPart = List[BDV[Double]]()
-      nonEmptyDocs.zipWithIndex.foreach { case ((_, termCounts: Vector), idx: Int) =>
+      nonEmptyDocs.foreach { case (_, termCounts: Vector) =>
         val ids: List[Int] = termCounts match {
           case v: DenseVector => (0 until v.size).toList
           case v: SparseVector => v.indices.toList

From 77488fb8e586103ba4c0858b73e1715f1a66671f Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 5 Nov 2015 23:49:44 +0800
Subject: [PATCH 507/896] [MINOR][SQL] A minor log line fix

`jars` in the log line is an array, so `$jars` doesn't print its content.

Author: Cheng Lian <lian@databricks.com>

Closes #9494 from liancheng/minor.log-fix.
---
 .../src/main/scala/org/apache/spark/sql/hive/HiveContext.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 670d6a78e36e..2d72b959af13 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -309,7 +309,8 @@ class HiveContext private[hive](
           .map(_.toURI.toURL)
 
       logInfo(
-        s"Initializing HiveMetastoreConnection version $hiveMetastoreVersion using $jars")
+        s"Initializing HiveMetastoreConnection version $hiveMetastoreVersion " +
+          s"using ${jars.mkString(":")}")
       new IsolatedClientLoader(
         version = metaVersion,
         execJars = jars.toSeq,

From 72634f27e3110fd7f5bfca498752f69d0b1f873c Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 5 Nov 2015 08:59:06 -0800
Subject: [PATCH 508/896] [MINOR][ML][DOC] Rename weights to coefficients in
 user guide

We should use ```coefficients``` rather than ```weights``` in user guide that freshman can get the right conventional name at the outset. mengxr vectorijk

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9493 from yanboliang/docs-coefficients.
---
 docs/ml-linear-methods.md | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/docs/ml-linear-methods.md b/docs/ml-linear-methods.md
index 4e94e2f9c708..16e2ee71293a 100644
--- a/docs/ml-linear-methods.md
+++ b/docs/ml-linear-methods.md
@@ -71,8 +71,8 @@ val lr = new LogisticRegression()
 // Fit the model
 val lrModel = lr.fit(training)
 
-// Print the weights and intercept for logistic regression
-println(s"Weights: ${lrModel.weights} Intercept: ${lrModel.intercept}")
+// Print the coefficients and intercept for logistic regression
+println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
 {% endhighlight %}
 </div>
 
@@ -105,8 +105,8 @@ public class LogisticRegressionWithElasticNetExample {
     // Fit the model
     LogisticRegressionModel lrModel = lr.fit(training);
 
-    // Print the weights and intercept for logistic regression
-    System.out.println("Weights: " + lrModel.weights() + " Intercept: " + lrModel.intercept());
+    // Print the coefficients and intercept for logistic regression
+    System.out.println("Coefficients: " + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
   }
 }
 {% endhighlight %}
@@ -124,8 +124,8 @@ lr = LogisticRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
 # Fit the model
 lrModel = lr.fit(training)
 
-# Print the weights and intercept for logistic regression
-print("Weights: " + str(lrModel.weights))
+# Print the coefficients and intercept for logistic regression
+print("Coefficients: " + str(lrModel.coefficients))
 print("Intercept: " + str(lrModel.intercept))
 {% endhighlight %}
 </div>
@@ -258,8 +258,8 @@ val lr = new LinearRegression()
 // Fit the model
 val lrModel = lr.fit(training)
 
-// Print the weights and intercept for linear regression
-println(s"Weights: ${lrModel.weights} Intercept: ${lrModel.intercept}")
+// Print the coefficients and intercept for linear regression
+println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
 
 // Summarize the model over the training set and print out some metrics
 val trainingSummary = lrModel.summary
@@ -302,8 +302,8 @@ public class LinearRegressionWithElasticNetExample {
     // Fit the model
     LinearRegressionModel lrModel = lr.fit(training);
 
-    // Print the weights and intercept for linear regression
-    System.out.println("Weights: " + lrModel.weights() + " Intercept: " + lrModel.intercept());
+    // Print the coefficients and intercept for linear regression
+    System.out.println("Coefficients: " + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
 
     // Summarize the model over the training set and print out some metrics
     LinearRegressionTrainingSummary trainingSummary = lrModel.summary();
@@ -330,8 +330,8 @@ lr = LinearRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
 # Fit the model
 lrModel = lr.fit(training)
 
-# Print the weights and intercept for linear regression
-print("Weights: " + str(lrModel.weights))
+# Print the coefficients and intercept for linear regression
+print("Coefficients: " + str(lrModel.coefficients))
 print("Intercept: " + str(lrModel.intercept))
 
 # Linear regression model summary is not yet supported in Python.

From 2e86cf1b01ae0ed69f72bf8054330440d432eeb7 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 5 Nov 2015 09:00:03 -0800
Subject: [PATCH 509/896] [SPARK-11527][ML][PYSPARK] PySpark
 AFTSurvivalRegressionModel should expose coefficients/intercept/scale

PySpark ```AFTSurvivalRegressionModel``` should expose coefficients/intercept/scale. mengxr vectorijk

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9492 from yanboliang/spark-11527.
---
 python/pyspark/ml/regression.py | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index ab26616f4a01..d7b4fd92c381 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -824,6 +824,30 @@ class AFTSurvivalRegressionModel(JavaModel):
     .. versionadded:: 1.6.0
     """
 
+    @property
+    @since("1.6.0")
+    def coefficients(self):
+        """
+        Model coefficients.
+        """
+        return self._call_java("coefficients")
+
+    @property
+    @since("1.6.0")
+    def intercept(self):
+        """
+        Model intercept.
+        """
+        return self._call_java("intercept")
+
+    @property
+    @since("1.6.0")
+    def scale(self):
+        """
+        Model scale paramter.
+        """
+        return self._call_java("scale")
+
     def predictQuantiles(self, features):
         """
         Predicted Quantiles

From a4b5cefcf1a196e6b257e6127d6b43a7e50200ac Mon Sep 17 00:00:00 2001
From: Nishkam Ravi <nishkamravi@gmail.com>
Date: Thu, 5 Nov 2015 09:35:49 -0800
Subject: [PATCH 510/896] [SPARK-11501][CORE][YARN] Propagate spark.rpc config
 to executors

spark.rpc is supposed to be configurable but is not currently (doesn't get propagated to executors because RpcEnv.create is done before driver properties are fetched).

Author: Nishkam Ravi <nishkamravi@gmail.com>

Closes #9460 from nishkamravi2/master_akka.
---
 core/src/main/scala/org/apache/spark/SparkConf.scala | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/src/main/scala/org/apache/spark/SparkConf.scala b/core/src/main/scala/org/apache/spark/SparkConf.scala
index f023e4b21cb4..19633a3ce6a0 100644
--- a/core/src/main/scala/org/apache/spark/SparkConf.scala
+++ b/core/src/main/scala/org/apache/spark/SparkConf.scala
@@ -629,6 +629,7 @@ private[spark] object SparkConf extends Logging {
     name.startsWith("spark.akka") ||
     (name.startsWith("spark.auth") && name != SecurityManager.SPARK_AUTH_SECRET_CONF) ||
     name.startsWith("spark.ssl") ||
+    name.startsWith("spark.rpc") ||
     isSparkPortConf(name)
   }
 

From b072ff4d1d05fc212cd7036d1897a032a395f0b3 Mon Sep 17 00:00:00 2001
From: Huaxin Gao <huaxing@oc0558782468.ibm.com>
Date: Thu, 5 Nov 2015 09:41:14 -0800
Subject: [PATCH 511/896] [SPARK-11474][SQL] change fetchSize to fetchsize

In DefaultDataSource.scala, it has
override def createRelation(
sqlContext: SQLContext,
parameters: Map[String, String]): BaseRelation
The parameters is CaseInsensitiveMap.
After this line
parameters.foreach(kv => properties.setProperty(kv._1, kv._2))
properties is set to all lower case key/value pairs and fetchSize becomes fetchsize.
However, in compute method in JDBCRDD, it has
val fetchSize = properties.getProperty("fetchSize", "0").toInt
so fetchSize value is always 0 and never gets set correctly.

Author: Huaxin Gao <huaxing@oc0558782468.ibm.com>

Closes #9473 from huaxingao/spark-11474.
---
 .../apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
index 730d88b024cb..018a009fbda6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
@@ -347,6 +347,7 @@ private[sql] class JDBCRDD(
 
   /**
    * Runs the SQL query against the JDBC driver.
+   *
    */
   override def compute(thePart: Partition, context: TaskContext): Iterator[InternalRow] =
     new Iterator[InternalRow] {
@@ -368,7 +369,7 @@ private[sql] class JDBCRDD(
     val sqlText = s"SELECT $columnList FROM $fqTable $myWhereClause"
     val stmt = conn.prepareStatement(sqlText,
         ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY)
-    val fetchSize = properties.getProperty("fetchSize", "0").toInt
+    val fetchSize = properties.getProperty("fetchsize", "0").toInt
     stmt.setFetchSize(fetchSize)
     val rs = stmt.executeQuery()
 

From 9da7ceed81b0afce7deb8f39f3a6d565d401a391 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 5 Nov 2015 09:56:18 -0800
Subject: [PATCH 512/896] [SPARK-11473][ML] R-like summary statistics with
 intercept for OLS via normal equation solver

Follow up [SPARK-9836](https://issues.apache.org/jira/browse/SPARK-9836), we should also support summary statistics for ```intercept```.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9485 from yanboliang/spark-11473.
---
 .../spark/ml/optim/WeightedLeastSquares.scala | 35 ++++++++++---------
 .../ml/regression/LinearRegression.scala      | 22 +++++++-----
 .../ml/regression/LinearRegressionSuite.scala | 16 ++++-----
 python/pyspark/ml/regression.py               | 16 ++++-----
 4 files changed, 48 insertions(+), 41 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
index e612a2122ed6..8617722ae542 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
@@ -75,7 +75,7 @@ private[ml] class WeightedLeastSquares(
     val summary = instances.treeAggregate(new Aggregator)(_.add(_), _.merge(_))
     summary.validate()
     logInfo(s"Number of instances: ${summary.count}.")
-    val k = summary.k
+    val k = if (fitIntercept) summary.k + 1 else summary.k
     val triK = summary.triK
     val wSum = summary.wSum
     val bBar = summary.bBar
@@ -86,14 +86,6 @@ private[ml] class WeightedLeastSquares(
     val aaBar = summary.aaBar
     val aaValues = aaBar.values
 
-    if (fitIntercept) {
-      // shift centers
-      // A^T A - aBar aBar^T
-      BLAS.spr(-1.0, aBar, aaValues)
-      // A^T b - bBar aBar
-      BLAS.axpy(-bBar, aBar, abBar)
-    }
-
     // add regularization to diagonals
     var i = 0
     var j = 2
@@ -111,21 +103,32 @@ private[ml] class WeightedLeastSquares(
       j += 1
     }
 
-    val x = new DenseVector(CholeskyDecomposition.solve(aaBar.values, abBar.values))
+    val aa = if (fitIntercept) {
+      Array.concat(aaBar.values, aBar.values, Array(1.0))
+    } else {
+      aaBar.values
+    }
+    val ab = if (fitIntercept) {
+      Array.concat(abBar.values, Array(bBar))
+    } else {
+      abBar.values
+    }
+
+    val x = CholeskyDecomposition.solve(aa, ab)
+
+    val aaInv = CholeskyDecomposition.inverse(aa, k)
 
-    val aaInv = CholeskyDecomposition.inverse(aaBar.values, k)
     // aaInv is a packed upper triangular matrix, here we get all elements on diagonal
     val diagInvAtWA = new DenseVector((1 to k).map { i =>
       aaInv(i + (i - 1) * i / 2 - 1) / wSum }.toArray)
 
-    // compute intercept
-    val intercept = if (fitIntercept) {
-      bBar - BLAS.dot(aBar, x)
+    val (coefficients, intercept) = if (fitIntercept) {
+      (new DenseVector(x.slice(0, x.length - 1)), x.last)
     } else {
-      0.0
+      (new DenseVector(x), 0.0)
     }
 
-    new WeightedLeastSquaresModel(x, intercept, diagInvAtWA)
+    new WeightedLeastSquaresModel(coefficients, intercept, diagInvAtWA)
   }
 }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index c51e30483ab3..663831381870 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -511,8 +511,7 @@ class LinearRegressionSummary private[regression] (
   }
 
   /**
-   * Standard error of estimated coefficients.
-   * Note that standard error of estimated intercept is not supported currently.
+   * Standard error of estimated coefficients and intercept.
    */
   lazy val coefficientStandardErrors: Array[Double] = {
     if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
@@ -532,21 +531,26 @@ class LinearRegressionSummary private[regression] (
     }
   }
 
-  /** T-statistic of estimated coefficients.
-    * Note that t-statistic of estimated intercept is not supported currently.
-    */
+  /**
+   * T-statistic of estimated coefficients and intercept.
+   */
   lazy val tValues: Array[Double] = {
     if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
       throw new UnsupportedOperationException(
         "No t-statistic available for this LinearRegressionModel")
     } else {
-      model.coefficients.toArray.zip(coefficientStandardErrors).map { x => x._1 / x._2 }
+      val estimate = if (model.getFitIntercept) {
+        Array.concat(model.coefficients.toArray, Array(model.intercept))
+      } else {
+        model.coefficients.toArray
+      }
+      estimate.zip(coefficientStandardErrors).map { x => x._1 / x._2 }
     }
   }
 
-  /** Two-sided p-value of estimated coefficients.
-    * Note that p-value of estimated intercept is not supported currently.
-    */
+  /**
+   * Two-sided p-value of estimated coefficients and intercept.
+   */
   lazy val pValues: Array[Double] = {
     if (diagInvAtWA.length == 1 && diagInvAtWA(0) == 0) {
       throw new UnsupportedOperationException(
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index fbf83e892286..a1d86fe8feda 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -621,13 +621,13 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(model.summary.objectiveHistory.length == 1)
         assert(model.summary.objectiveHistory(0) == 0.0)
         val devianceResidualsR = Array(-0.35566, 0.34504)
-        val seCoefR = Array(0.0011756, 0.0009032)
-        val tValsR = Array(3998, 7971)
-        val pValsR = Array(0, 0)
+        val seCoefR = Array(0.0011756, 0.0009032, 0.0018489)
+        val tValsR = Array(3998, 7971, 3407)
+        val pValsR = Array(0, 0, 0)
         model.summary.devianceResiduals.zip(devianceResidualsR).foreach { x =>
-          assert(x._1 ~== x._2 absTol 1E-3) }
+          assert(x._1 ~== x._2 absTol 1E-5) }
         model.summary.coefficientStandardErrors.zip(seCoefR).foreach{ x =>
-          assert(x._1 ~== x._2 absTol 1E-3) }
+          assert(x._1 ~== x._2 absTol 1E-5) }
         model.summary.tValues.map(_.round).zip(tValsR).foreach{ x => assert(x._1 === x._2) }
         model.summary.pValues.map(_.round).zip(pValsR).foreach{ x => assert(x._1 === x._2) }
       }
@@ -789,9 +789,9 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     val coefficientsR = Vectors.dense(Array(6.080, -0.600))
     val interceptR = 18.080
     val devianceResidualsR = Array(-1.358, 1.920)
-    val seCoefR = Array(5.556, 1.960)
-    val tValsR = Array(1.094, -0.306)
-    val pValsR = Array(0.471, 0.811)
+    val seCoefR = Array(5.556, 1.960, 9.608)
+    val tValsR = Array(1.094, -0.306, 1.882)
+    val pValsR = Array(0.471, 0.811, 0.311)
 
     assert(model.coefficients ~== coefficientsR absTol 1E-3)
     assert(model.intercept ~== interceptR absTol 1E-3)
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index d7b4fd92c381..7648bf13266b 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -55,15 +55,15 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
     >>> lr = LinearRegression(maxIter=5, regParam=0.0, solver="normal")
     >>> model = lr.fit(df)
     >>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
-    >>> model.transform(test0).head().prediction
-    -1.0
-    >>> model.weights
-    DenseVector([1.0])
-    >>> model.intercept
-    0.0
+    >>> abs(model.transform(test0).head().prediction - (-1.0)) < 0.001
+    True
+    >>> abs(model.coefficients[0] - 1.0) < 0.001
+    True
+    >>> abs(model.intercept - 0.0) < 0.001
+    True
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
-    >>> model.transform(test1).head().prediction
-    1.0
+    >>> abs(model.transform(test1).head().prediction - 1.0) < 0.001
+    True
     >>> lr.setParams("vector")
     Traceback (most recent call last):
         ...

From c76865c6220e3e7b2a266bbc4935567ef55303d8 Mon Sep 17 00:00:00 2001
From: Srinivasa Reddy Vundela <vsr@cloudera.com>
Date: Thu, 5 Nov 2015 11:30:44 -0800
Subject: [PATCH 513/896] [SPARK-11484][WEBUI] Using proxyBase set by spark AM

Use the proxyBase set by the AM, if not found then use env. This is to fix the issue if somebody accidentally set APPLICATION_WEB_PROXY_BASE to wrong proxyBase

Author: Srinivasa Reddy Vundela <vsr@cloudera.com>

Closes #9448 from vundela/master.
---
 .../src/main/scala/org/apache/spark/ui/UIUtils.scala | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
index 68a9f912a5d2..25dcb604d9e5 100644
--- a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
+++ b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
@@ -143,14 +143,10 @@ private[spark] object UIUtils extends Logging {
 
   // Yarn has to go through a proxy so the base uri is provided and has to be on all links
   def uiRoot: String = {
-    if (System.getenv("APPLICATION_WEB_PROXY_BASE") != null) {
-      System.getenv("APPLICATION_WEB_PROXY_BASE")
-    } else if (System.getProperty("spark.ui.proxyBase") != null) {
-      System.getProperty("spark.ui.proxyBase")
-    }
-    else {
-      ""
-    }
+    // SPARK-11484 - Use the proxyBase set by the AM, if not found then use env.
+    sys.props.get("spark.ui.proxyBase")
+      .orElse(sys.env.get("APPLICATION_WEB_PROXY_BASE"))
+      .getOrElse("")
   }
 
   def prependBaseUri(basePath: String = "", resource: String = ""): String = {

From 6b87acd6649a3390b5c2c4fcb61e58d125d0d87c Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 11:58:13 -0800
Subject: [PATCH 514/896] [SPARK-11513][SQL] Remove implicit conversion from
 LogicalPlan to DataFrame

This internal implicit conversion has been a source of confusion for a lot of new developers.

Author: Reynold Xin <rxin@databricks.com>

Closes #9479 from rxin/SPARK-11513.
---
 .../org/apache/spark/sql/DataFrame.scala      | 123 +++++++++++-------
 .../scala/org/apache/spark/sql/Dataset.scala  |   5 +-
 2 files changed, 78 insertions(+), 50 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index d3a2249d7006..6336dee7be6a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -147,14 +147,6 @@ class DataFrame private[sql](
       queryExecution.analyzed
   }
 
-  /**
-   * An implicit conversion function internal to this class for us to avoid doing
-   * "new DataFrame(...)" everywhere.
-   */
-  @inline private implicit def logicalPlanToDataFrame(logicalPlan: LogicalPlan): DataFrame = {
-    new DataFrame(sqlContext, logicalPlan)
-  }
-
   protected[sql] def resolve(colName: String): NamedExpression = {
     queryExecution.analyzed.resolveQuoted(colName, sqlContext.analyzer.resolver).getOrElse {
       throw new AnalysisException(
@@ -235,7 +227,7 @@ class DataFrame private[sql](
     // For Data that has more than "numRows" records
     if (hasMoreData) {
       val rowsString = if (numRows == 1) "row" else "rows"
-      sb.append(s"only showing top $numRows ${rowsString}\n")
+      sb.append(s"only showing top $numRows $rowsString\n")
     }
 
     sb.toString()
@@ -332,7 +324,7 @@ class DataFrame private[sql](
    */
   def explain(extended: Boolean): Unit = {
     val explain = ExplainCommand(queryExecution.logical, extended = extended)
-    explain.queryExecution.executedPlan.executeCollect().foreach {
+    withPlan(explain).queryExecution.executedPlan.executeCollect().foreach {
       // scalastyle:off println
       r => println(r.getString(0))
       // scalastyle:on println
@@ -370,7 +362,7 @@ class DataFrame private[sql](
    * @group action
    * @since 1.3.0
    */
-  def show(numRows: Int): Unit = show(numRows, true)
+  def show(numRows: Int): Unit = show(numRows, truncate = true)
 
   /**
    * Displays the top 20 rows of [[DataFrame]] in a tabular form. Strings more than 20 characters
@@ -445,7 +437,7 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def join(right: DataFrame): DataFrame = {
+  def join(right: DataFrame): DataFrame = withPlan {
     Join(logicalPlan, right.logicalPlan, joinType = Inner, None)
   }
 
@@ -520,21 +512,25 @@ class DataFrame private[sql](
       Join(logicalPlan, right.logicalPlan, joinType = Inner, None)).analyzed.asInstanceOf[Join]
 
     // Project only one of the join columns.
-    val joinedCols = usingColumns.map(col => joined.right.resolve(col))
+    val joinedCols = usingColumns.map(col => withPlan(joined.right).resolve(col))
     val condition = usingColumns.map { col =>
-      catalyst.expressions.EqualTo(joined.left.resolve(col), joined.right.resolve(col))
+      catalyst.expressions.EqualTo(
+        withPlan(joined.left).resolve(col),
+        withPlan(joined.right).resolve(col))
     }.reduceLeftOption[catalyst.expressions.BinaryExpression] { (cond, eqTo) =>
       catalyst.expressions.And(cond, eqTo)
     }
 
-    Project(
-      joined.output.filterNot(joinedCols.contains(_)),
-      Join(
-        joined.left,
-        joined.right,
-        joinType = JoinType(joinType),
-        condition)
-    )
+    withPlan {
+      Project(
+        joined.output.filterNot(joinedCols.contains(_)),
+        Join(
+          joined.left,
+          joined.right,
+          joinType = JoinType(joinType),
+          condition)
+      )
+    }
   }
 
   /**
@@ -581,19 +577,20 @@ class DataFrame private[sql](
 
     // Trigger analysis so in the case of self-join, the analyzer will clone the plan.
     // After the cloning, left and right side will have distinct expression ids.
-    val plan = Join(logicalPlan, right.logicalPlan, JoinType(joinType), Some(joinExprs.expr))
+    val plan = withPlan(
+      Join(logicalPlan, right.logicalPlan, JoinType(joinType), Some(joinExprs.expr)))
       .queryExecution.analyzed.asInstanceOf[Join]
 
     // If auto self join alias is disabled, return the plan.
     if (!sqlContext.conf.dataFrameSelfJoinAutoResolveAmbiguity) {
-      return plan
+      return withPlan(plan)
     }
 
     // If left/right have no output set intersection, return the plan.
-    val lanalyzed = this.logicalPlan.queryExecution.analyzed
-    val ranalyzed = right.logicalPlan.queryExecution.analyzed
+    val lanalyzed = withPlan(this.logicalPlan).queryExecution.analyzed
+    val ranalyzed = withPlan(right.logicalPlan).queryExecution.analyzed
     if (lanalyzed.outputSet.intersect(ranalyzed.outputSet).isEmpty) {
-      return plan
+      return withPlan(plan)
     }
 
     // Otherwise, find the trivially true predicates and automatically resolves them to both sides.
@@ -602,9 +599,14 @@ class DataFrame private[sql](
     val cond = plan.condition.map { _.transform {
       case catalyst.expressions.EqualTo(a: AttributeReference, b: AttributeReference)
           if a.sameRef(b) =>
-        catalyst.expressions.EqualTo(plan.left.resolve(a.name), plan.right.resolve(b.name))
+        catalyst.expressions.EqualTo(
+          withPlan(plan.left).resolve(a.name),
+          withPlan(plan.right).resolve(b.name))
     }}
-    plan.copy(condition = cond)
+
+    withPlan {
+      plan.copy(condition = cond)
+    }
   }
 
   /**
@@ -707,7 +709,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def as(alias: String): DataFrame = Subquery(alias, logicalPlan)
+  def as(alias: String): DataFrame = withPlan {
+    Subquery(alias, logicalPlan)
+  }
 
   /**
    * (Scala-specific) Returns a new [[DataFrame]] with an alias set.
@@ -739,7 +743,7 @@ class DataFrame private[sql](
    * @since 1.3.0
    */
   @scala.annotation.varargs
-  def select(cols: Column*): DataFrame = {
+  def select(cols: Column*): DataFrame = withPlan {
     val namedExpressions = cols.map {
       // Wrap UnresolvedAttribute with UnresolvedAlias, as when we resolve UnresolvedAttribute, we
       // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
@@ -798,7 +802,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def filter(condition: Column): DataFrame = Filter(condition.expr, logicalPlan)
+  def filter(condition: Column): DataFrame = withPlan {
+    Filter(condition.expr, logicalPlan)
+  }
 
   /**
    * Filters rows using the given SQL expression.
@@ -1039,7 +1045,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def limit(n: Int): DataFrame = Limit(Literal(n), logicalPlan)
+  def limit(n: Int): DataFrame = withPlan {
+    Limit(Literal(n), logicalPlan)
+  }
 
   /**
    * Returns a new [[DataFrame]] containing union of rows in this frame and another frame.
@@ -1047,7 +1055,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def unionAll(other: DataFrame): DataFrame = Union(logicalPlan, other.logicalPlan)
+  def unionAll(other: DataFrame): DataFrame = withPlan {
+    Union(logicalPlan, other.logicalPlan)
+  }
 
   /**
    * Returns a new [[DataFrame]] containing rows only in both this frame and another frame.
@@ -1055,7 +1065,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def intersect(other: DataFrame): DataFrame = Intersect(logicalPlan, other.logicalPlan)
+  def intersect(other: DataFrame): DataFrame = withPlan {
+    Intersect(logicalPlan, other.logicalPlan)
+  }
 
   /**
    * Returns a new [[DataFrame]] containing rows in this frame but not in another frame.
@@ -1063,7 +1075,9 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def except(other: DataFrame): DataFrame = Except(logicalPlan, other.logicalPlan)
+  def except(other: DataFrame): DataFrame = withPlan {
+    Except(logicalPlan, other.logicalPlan)
+  }
 
   /**
    * Returns a new [[DataFrame]] by sampling a fraction of rows.
@@ -1074,7 +1088,7 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def sample(withReplacement: Boolean, fraction: Double, seed: Long): DataFrame = {
+  def sample(withReplacement: Boolean, fraction: Double, seed: Long): DataFrame = withPlan {
     Sample(0.0, fraction, withReplacement, seed, logicalPlan)
   }
 
@@ -1102,7 +1116,7 @@ class DataFrame private[sql](
     val sum = weights.sum
     val normalizedCumWeights = weights.map(_ / sum).scanLeft(0.0d)(_ + _)
     normalizedCumWeights.sliding(2).map { x =>
-      new DataFrame(sqlContext, Sample(x(0), x(1), false, seed, logicalPlan))
+      new DataFrame(sqlContext, Sample(x(0), x(1), withReplacement = false, seed, logicalPlan))
     }.toArray
   }
 
@@ -1162,8 +1176,10 @@ class DataFrame private[sql](
       f.andThen(_.map(convert(_).asInstanceOf[InternalRow]))
     val generator = UserDefinedGenerator(elementTypes, rowFunction, input.map(_.expr))
 
-    Generate(generator, join = true, outer = false,
-      qualifier = None, generatorOutput = Nil, logicalPlan)
+    withPlan {
+      Generate(generator, join = true, outer = false,
+        qualifier = None, generatorOutput = Nil, logicalPlan)
+    }
   }
 
   /**
@@ -1190,8 +1206,10 @@ class DataFrame private[sql](
     }
     val generator = UserDefinedGenerator(elementTypes, rowFunction, apply(inputColumn).expr :: Nil)
 
-    Generate(generator, join = true, outer = false,
-      qualifier = None, generatorOutput = Nil, logicalPlan)
+    withPlan {
+      Generate(generator, join = true, outer = false,
+        qualifier = None, generatorOutput = Nil, logicalPlan)
+    }
   }
 
   /////////////////////////////////////////////////////////////////////////////
@@ -1309,7 +1327,7 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.4.0
    */
-  def dropDuplicates(colNames: Seq[String]): DataFrame = {
+  def dropDuplicates(colNames: Seq[String]): DataFrame = withPlan {
     val groupCols = colNames.map(resolve)
     val groupColExprIds = groupCols.map(_.exprId)
     val aggCols = logicalPlan.output.map { attr =>
@@ -1355,7 +1373,7 @@ class DataFrame private[sql](
    * @since 1.3.1
    */
   @scala.annotation.varargs
-  def describe(cols: String*): DataFrame = {
+  def describe(cols: String*): DataFrame = withPlan {
 
     // The list of summary statistics to compute, in the form of expressions.
     val statistics = List[(String, Expression => Expression)](
@@ -1505,7 +1523,7 @@ class DataFrame private[sql](
    * @group dfops
    * @since 1.3.0
    */
-  def repartition(numPartitions: Int): DataFrame = {
+  def repartition(numPartitions: Int): DataFrame = withPlan {
     Repartition(numPartitions, shuffle = true, logicalPlan)
   }
 
@@ -1519,7 +1537,7 @@ class DataFrame private[sql](
    * @since 1.6.0
    */
   @scala.annotation.varargs
-  def repartition(numPartitions: Int, partitionExprs: Column*): DataFrame = {
+  def repartition(numPartitions: Int, partitionExprs: Column*): DataFrame = withPlan {
     RepartitionByExpression(partitionExprs.map(_.expr), logicalPlan, Some(numPartitions))
   }
 
@@ -1533,7 +1551,7 @@ class DataFrame private[sql](
    * @since 1.6.0
    */
   @scala.annotation.varargs
-  def repartition(partitionExprs: Column*): DataFrame = {
+  def repartition(partitionExprs: Column*): DataFrame = withPlan {
     RepartitionByExpression(partitionExprs.map(_.expr), logicalPlan, numPartitions = None)
   }
 
@@ -1545,7 +1563,7 @@ class DataFrame private[sql](
    * @group rdd
    * @since 1.4.0
    */
-  def coalesce(numPartitions: Int): DataFrame = {
+  def coalesce(numPartitions: Int): DataFrame = withPlan {
     Repartition(numPartitions, shuffle = false, logicalPlan)
   }
 
@@ -2066,7 +2084,14 @@ class DataFrame private[sql](
           SortOrder(expr, Ascending)
       }
     }
-    Sort(sortOrder, global = global, logicalPlan)
+    withPlan {
+      Sort(sortOrder, global = global, logicalPlan)
+    }
+  }
+
+  /** A convenient function to wrap a logical plan and produce a DataFrame. */
+  @inline private def withPlan(logicalPlan: => LogicalPlan): DataFrame = {
+    new DataFrame(sqlContext, logicalPlan)
   }
 
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 7b75aeec4cf3..500227e93a47 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -107,13 +107,16 @@ class Dataset[T] private(
    * strongly typed objects that Dataset operations work on, a Dataframe returns generic [[Row]]
    * objects that allow fields to be accessed by ordinal or name.
    */
+  // This is declared with parentheses to prevent the Scala compiler from treating
+  // `ds.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
   def toDF(): DataFrame = DataFrame(sqlContext, logicalPlan)
 
-
   /**
    * Returns this Dataset.
    * @since 1.6.0
    */
+  // This is declared with parentheses to prevent the Scala compiler from treating
+  // `ds.toDS("1")` as invoking this toDF and then apply on the returned Dataset.
   def toDS(): Dataset[T] = this
 
   /**

From f80f7b69a3f81d0ea879a31c769d17ffbbac74aa Mon Sep 17 00:00:00 2001
From: "Ehsan M.Kermani" <ehsanmo1367@gmail.com>
Date: Thu, 5 Nov 2015 12:11:57 -0800
Subject: [PATCH 515/896] [SPARK-10265][DOCUMENTATION, ML] Fixed @Since
 annotation to ml.regression

Here is my first commit.

Author: Ehsan M.Kermani <ehsanmo1367@gmail.com>

Closes #8728 from ehsanmok/SinceAnn.
---
 .../ml/regression/DecisionTreeRegressor.scala | 20 +++++++++--
 .../spark/ml/regression/GBTRegressor.scala    | 33 ++++++++++++++++---
 .../ml/regression/IsotonicRegression.scala    | 26 +++++++++++++--
 .../ml/regression/LinearRegression.scala      | 28 ++++++++++++++--
 .../ml/regression/RandomForestRegressor.scala | 30 ++++++++++++++---
 5 files changed, 119 insertions(+), 18 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
index 88b79a4eb82b..04420fc6e825 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.regression
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{PredictionModel, Predictor}
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.tree.{DecisionTreeModel, DecisionTreeParams, Node, TreeRegressorParams}
@@ -36,30 +36,39 @@ import org.apache.spark.sql.DataFrame
  * for regression.
  * It supports both continuous and categorical features.
  */
+@Since("1.4.0")
 @Experimental
-final class DecisionTreeRegressor(override val uid: String)
+final class DecisionTreeRegressor @Since("1.4.0") (@Since("1.4.0") override val uid: String)
   extends Predictor[Vector, DecisionTreeRegressor, DecisionTreeRegressionModel]
   with DecisionTreeParams with TreeRegressorParams {
 
+  @Since("1.4.0")
   def this() = this(Identifiable.randomUID("dtr"))
 
   // Override parameter setters from parent trait for Java API compatibility.
-
+  @Since("1.4.0")
   override def setMaxDepth(value: Int): this.type = super.setMaxDepth(value)
 
+  @Since("1.4.0")
   override def setMaxBins(value: Int): this.type = super.setMaxBins(value)
 
+  @Since("1.4.0")
   override def setMinInstancesPerNode(value: Int): this.type =
     super.setMinInstancesPerNode(value)
 
+  @Since("1.4.0")
   override def setMinInfoGain(value: Double): this.type = super.setMinInfoGain(value)
 
+  @Since("1.4.0")
   override def setMaxMemoryInMB(value: Int): this.type = super.setMaxMemoryInMB(value)
 
+  @Since("1.4.0")
   override def setCacheNodeIds(value: Boolean): this.type = super.setCacheNodeIds(value)
 
+  @Since("1.4.0")
   override def setCheckpointInterval(value: Int): this.type = super.setCheckpointInterval(value)
 
+  @Since("1.4.0")
   override def setImpurity(value: String): this.type = super.setImpurity(value)
 
   override protected def train(dataset: DataFrame): DecisionTreeRegressionModel = {
@@ -78,9 +87,11 @@ final class DecisionTreeRegressor(override val uid: String)
       subsamplingRate = 1.0)
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): DecisionTreeRegressor = defaultCopy(extra)
 }
 
+@Since("1.4.0")
 @Experimental
 object DecisionTreeRegressor {
   /** Accessor for supported impurities: variance */
@@ -93,6 +104,7 @@ object DecisionTreeRegressor {
  * It supports both continuous and categorical features.
  * @param rootNode  Root of the decision tree
  */
+@Since("1.4.0")
 @Experimental
 final class DecisionTreeRegressionModel private[ml] (
     override val uid: String,
@@ -115,10 +127,12 @@ final class DecisionTreeRegressionModel private[ml] (
     rootNode.predictImpl(features).prediction
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): DecisionTreeRegressionModel = {
     copyValues(new DecisionTreeRegressionModel(uid, rootNode, numFeatures), extra).setParent(parent)
   }
 
+  @Since("1.4.0")
   override def toString: String = {
     s"DecisionTreeRegressionModel (uid=$uid) of depth $depth with $numNodes nodes"
   }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
index 65b5b3e0727d..07144cc7cfbd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/GBTRegressor.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.regression
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{PredictionModel, Predictor}
 import org.apache.spark.ml.param.{Param, ParamMap}
 import org.apache.spark.ml.tree.{DecisionTreeModel, GBTParams, TreeEnsembleModel, TreeRegressorParams}
@@ -42,54 +42,65 @@ import org.apache.spark.sql.types.DoubleType
  * learning algorithm for regression.
  * It supports both continuous and categorical features.
  */
+@Since("1.4.0")
 @Experimental
-final class GBTRegressor(override val uid: String)
+final class GBTRegressor @Since("1.4.0") (@Since("1.4.0") override val uid: String)
   extends Predictor[Vector, GBTRegressor, GBTRegressionModel]
   with GBTParams with TreeRegressorParams with Logging {
 
+  @Since("1.4.0")
   def this() = this(Identifiable.randomUID("gbtr"))
 
   // Override parameter setters from parent trait for Java API compatibility.
 
   // Parameters from TreeRegressorParams:
-
+  @Since("1.4.0")
   override def setMaxDepth(value: Int): this.type = super.setMaxDepth(value)
 
+  @Since("1.4.0")
   override def setMaxBins(value: Int): this.type = super.setMaxBins(value)
 
+  @Since("1.4.0")
   override def setMinInstancesPerNode(value: Int): this.type =
     super.setMinInstancesPerNode(value)
 
+  @Since("1.4.0")
   override def setMinInfoGain(value: Double): this.type = super.setMinInfoGain(value)
 
+  @Since("1.4.0")
   override def setMaxMemoryInMB(value: Int): this.type = super.setMaxMemoryInMB(value)
 
+  @Since("1.4.0")
   override def setCacheNodeIds(value: Boolean): this.type = super.setCacheNodeIds(value)
 
+  @Since("1.4.0")
   override def setCheckpointInterval(value: Int): this.type = super.setCheckpointInterval(value)
 
   /**
    * The impurity setting is ignored for GBT models.
    * Individual trees are built using impurity "Variance."
    */
+  @Since("1.4.0")
   override def setImpurity(value: String): this.type = {
     logWarning("GBTRegressor.setImpurity should NOT be used")
     this
   }
 
   // Parameters from TreeEnsembleParams:
-
+  @Since("1.4.0")
   override def setSubsamplingRate(value: Double): this.type = super.setSubsamplingRate(value)
 
+  @Since("1.4.0")
   override def setSeed(value: Long): this.type = {
     logWarning("The 'seed' parameter is currently ignored by Gradient Boosting.")
     super.setSeed(value)
   }
 
   // Parameters from GBTParams:
-
+  @Since("1.4.0")
   override def setMaxIter(value: Int): this.type = super.setMaxIter(value)
 
+  @Since("1.4.0")
   override def setStepSize(value: Double): this.type = super.setStepSize(value)
 
   // Parameters for GBTRegressor:
@@ -100,6 +111,7 @@ final class GBTRegressor(override val uid: String)
    * (default = squared)
    * @group param
    */
+  @Since("1.4.0")
   val lossType: Param[String] = new Param[String](this, "lossType", "Loss function which GBT" +
     " tries to minimize (case-insensitive). Supported options:" +
     s" ${GBTRegressor.supportedLossTypes.mkString(", ")}",
@@ -108,9 +120,11 @@ final class GBTRegressor(override val uid: String)
   setDefault(lossType -> "squared")
 
   /** @group setParam */
+  @Since("1.4.0")
   def setLossType(value: String): this.type = set(lossType, value)
 
   /** @group getParam */
+  @Since("1.4.0")
   def getLossType: String = $(lossType).toLowerCase
 
   /** (private[ml]) Convert new loss to old loss. */
@@ -135,13 +149,16 @@ final class GBTRegressor(override val uid: String)
     GBTRegressionModel.fromOld(oldModel, this, categoricalFeatures, numFeatures)
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): GBTRegressor = defaultCopy(extra)
 }
 
+@Since("1.4.0")
 @Experimental
 object GBTRegressor {
   // The losses below should be lowercase.
   /** Accessor for supported loss settings: squared (L2), absolute (L1) */
+  @Since("1.4.0")
   final val supportedLossTypes: Array[String] = Array("squared", "absolute").map(_.toLowerCase)
 }
 
@@ -154,6 +171,7 @@ object GBTRegressor {
  * @param _trees  Decision trees in the ensemble.
  * @param _treeWeights  Weights for the decision trees in the ensemble.
  */
+@Since("1.4.0")
 @Experimental
 final class GBTRegressionModel private[ml](
     override val uid: String,
@@ -172,11 +190,14 @@ final class GBTRegressionModel private[ml](
    * @param _trees  Decision trees in the ensemble.
    * @param _treeWeights  Weights for the decision trees in the ensemble.
    */
+  @Since("1.4.0")
   def this(uid: String, _trees: Array[DecisionTreeRegressionModel], _treeWeights: Array[Double]) =
     this(uid, _trees, _treeWeights, -1)
 
+  @Since("1.4.0")
   override def trees: Array[DecisionTreeModel] = _trees.asInstanceOf[Array[DecisionTreeModel]]
 
+  @Since("1.4.0")
   override def treeWeights: Array[Double] = _treeWeights
 
   override protected def transformImpl(dataset: DataFrame): DataFrame = {
@@ -194,11 +215,13 @@ final class GBTRegressionModel private[ml](
     blas.ddot(numTrees, treePredictions, 1, _treeWeights, 1)
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): GBTRegressionModel = {
     copyValues(new GBTRegressionModel(uid, _trees, _treeWeights, numFeatures),
       extra).setParent(parent)
   }
 
+  @Since("1.4.0")
   override def toString: String = {
     s"GBTRegressionModel (uid=$uid) with $numTrees trees"
   }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
index f4a17c8f9a58..a1fe01b04710 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.ml.regression
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared.{HasFeaturesCol, HasLabelCol, HasPredictionCol, HasWeightCol}
@@ -124,32 +124,42 @@ private[regression] trait IsotonicRegressionBase extends Params with HasFeatures
  *
  * Uses [[org.apache.spark.mllib.regression.IsotonicRegression]].
  */
+@Since("1.5.0")
 @Experimental
-class IsotonicRegression(override val uid: String) extends Estimator[IsotonicRegressionModel]
-  with IsotonicRegressionBase {
+class IsotonicRegression @Since("1.5.0") (@Since("1.5.0") override val uid: String)
+  extends Estimator[IsotonicRegressionModel] with IsotonicRegressionBase {
 
+  @Since("1.5.0")
   def this() = this(Identifiable.randomUID("isoReg"))
 
   /** @group setParam */
+  @Since("1.5.0")
   def setLabelCol(value: String): this.type = set(labelCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setFeaturesCol(value: String): this.type = set(featuresCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setIsotonic(value: Boolean): this.type = set(isotonic, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setWeightCol(value: String): this.type = set(weightCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setFeatureIndex(value: Int): this.type = set(featureIndex, value)
 
+  @Since("1.5.0")
   override def copy(extra: ParamMap): IsotonicRegression = defaultCopy(extra)
 
+  @Since("1.5.0")
   override def fit(dataset: DataFrame): IsotonicRegressionModel = {
     validateAndTransformSchema(dataset.schema, fitting = true)
     // Extract columns from data.  If dataset is persisted, do not persist oldDataset.
@@ -163,6 +173,7 @@ class IsotonicRegression(override val uid: String) extends Estimator[IsotonicReg
     copyValues(new IsotonicRegressionModel(uid, oldModel).setParent(this))
   }
 
+  @Since("1.5.0")
   override def transformSchema(schema: StructType): StructType = {
     validateAndTransformSchema(schema, fitting = true)
   }
@@ -178,6 +189,7 @@ class IsotonicRegression(override val uid: String) extends Estimator[IsotonicReg
  * @param oldModel A [[org.apache.spark.mllib.regression.IsotonicRegressionModel]]
  *                 model trained by [[org.apache.spark.mllib.regression.IsotonicRegression]].
  */
+@Since("1.5.0")
 @Experimental
 class IsotonicRegressionModel private[ml] (
     override val uid: String,
@@ -185,27 +197,34 @@ class IsotonicRegressionModel private[ml] (
   extends Model[IsotonicRegressionModel] with IsotonicRegressionBase {
 
   /** @group setParam */
+  @Since("1.5.0")
   def setFeaturesCol(value: String): this.type = set(featuresCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setPredictionCol(value: String): this.type = set(predictionCol, value)
 
   /** @group setParam */
+  @Since("1.5.0")
   def setFeatureIndex(value: Int): this.type = set(featureIndex, value)
 
   /** Boundaries in increasing order for which predictions are known. */
+  @Since("1.5.0")
   def boundaries: Vector = Vectors.dense(oldModel.boundaries)
 
   /**
    * Predictions associated with the boundaries at the same index, monotone because of isotonic
    * regression.
    */
+  @Since("1.5.0")
   def predictions: Vector = Vectors.dense(oldModel.predictions)
 
+  @Since("1.5.0")
   override def copy(extra: ParamMap): IsotonicRegressionModel = {
     copyValues(new IsotonicRegressionModel(uid, oldModel), extra).setParent(parent)
   }
 
+  @Since("1.5.0")
   override def transform(dataset: DataFrame): DataFrame = {
     val predict = dataset.schema($(featuresCol)).dataType match {
       case DoubleType =>
@@ -217,6 +236,7 @@ class IsotonicRegressionModel private[ml] (
     dataset.withColumn($(predictionCol), predict(col($(featuresCol))))
   }
 
+  @Since("1.5.0")
   override def transformSchema(schema: StructType): StructType = {
     validateAndTransformSchema(schema, fitting = false)
   }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 663831381870..913140e58198 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -24,9 +24,9 @@ import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS,
 import breeze.stats.distributions.StudentsT
 
 import org.apache.spark.{Logging, SparkException}
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.optim.WeightedLeastSquares
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.param.shared._
@@ -61,11 +61,13 @@ private[regression] trait LinearRegressionParams extends PredictorParams
  *  - L1 (Lasso)
  *  - L2 + L1 (elastic net)
  */
+@Since("1.3.0")
 @Experimental
-class LinearRegression(override val uid: String)
+class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String)
   extends Regressor[Vector, LinearRegression, LinearRegressionModel]
   with LinearRegressionParams with Logging {
 
+  @Since("1.4.0")
   def this() = this(Identifiable.randomUID("linReg"))
 
   /**
@@ -73,6 +75,7 @@ class LinearRegression(override val uid: String)
    * Default is 0.0.
    * @group setParam
    */
+  @Since("1.3.0")
   def setRegParam(value: Double): this.type = set(regParam, value)
   setDefault(regParam -> 0.0)
 
@@ -81,6 +84,7 @@ class LinearRegression(override val uid: String)
    * Default is true.
    * @group setParam
    */
+  @Since("1.5.0")
   def setFitIntercept(value: Boolean): this.type = set(fitIntercept, value)
   setDefault(fitIntercept -> true)
 
@@ -93,6 +97,7 @@ class LinearRegression(override val uid: String)
    * Default is true.
    * @group setParam
    */
+  @Since("1.5.0")
   def setStandardization(value: Boolean): this.type = set(standardization, value)
   setDefault(standardization -> true)
 
@@ -103,6 +108,7 @@ class LinearRegression(override val uid: String)
    * Default is 0.0 which is an L2 penalty.
    * @group setParam
    */
+  @Since("1.4.0")
   def setElasticNetParam(value: Double): this.type = set(elasticNetParam, value)
   setDefault(elasticNetParam -> 0.0)
 
@@ -111,6 +117,7 @@ class LinearRegression(override val uid: String)
    * Default is 100.
    * @group setParam
    */
+  @Since("1.3.0")
   def setMaxIter(value: Int): this.type = set(maxIter, value)
   setDefault(maxIter -> 100)
 
@@ -120,6 +127,7 @@ class LinearRegression(override val uid: String)
    * Default is 1E-6.
    * @group setParam
    */
+  @Since("1.4.0")
   def setTol(value: Double): this.type = set(tol, value)
   setDefault(tol -> 1E-6)
 
@@ -129,6 +137,7 @@ class LinearRegression(override val uid: String)
    * Default is empty, so all instances have weight one.
    * @group setParam
    */
+  @Since("1.6.0")
   def setWeightCol(value: String): this.type = set(weightCol, value)
   setDefault(weightCol -> "")
 
@@ -139,6 +148,7 @@ class LinearRegression(override val uid: String)
    * selected automatically.
    * @group setParam
    */
+  @Since("1.6.0")
   def setSolver(value: String): this.type = set(solver, value)
   setDefault(solver -> "auto")
 
@@ -329,6 +339,7 @@ class LinearRegression(override val uid: String)
     model.setSummary(trainingSummary)
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): LinearRegression = defaultCopy(extra)
 }
 
@@ -336,6 +347,7 @@ class LinearRegression(override val uid: String)
  * :: Experimental ::
  * Model produced by [[LinearRegression]].
  */
+@Since("1.3.0")
 @Experimental
 class LinearRegressionModel private[ml] (
     override val uid: String,
@@ -355,6 +367,7 @@ class LinearRegressionModel private[ml] (
    * Gets summary (e.g. residuals, mse, r-squared ) of model on training set. An exception is
    * thrown if `trainingSummary == None`.
    */
+  @Since("1.5.0")
   def summary: LinearRegressionTrainingSummary = trainingSummary match {
     case Some(summ) => summ
     case None =>
@@ -369,6 +382,7 @@ class LinearRegressionModel private[ml] (
   }
 
   /** Indicates whether a training summary exists for this model instance. */
+  @Since("1.5.0")
   def hasSummary: Boolean = trainingSummary.isDefined
 
   /**
@@ -402,6 +416,7 @@ class LinearRegressionModel private[ml] (
     dot(features, coefficients) + intercept
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): LinearRegressionModel = {
     val newModel = copyValues(new LinearRegressionModel(uid, coefficients, intercept), extra)
     if (trainingSummary.isDefined) newModel.setSummary(trainingSummary.get)
@@ -416,6 +431,7 @@ class LinearRegressionModel private[ml] (
  * @param predictions predictions outputted by the model's `transform` method.
  * @param objectiveHistory objective function (scaled loss + regularization) at each iteration.
  */
+@Since("1.5.0")
 @Experimental
 class LinearRegressionTrainingSummary private[regression] (
     predictions: DataFrame,
@@ -428,6 +444,7 @@ class LinearRegressionTrainingSummary private[regression] (
   extends LinearRegressionSummary(predictions, predictionCol, labelCol, model, diagInvAtWA) {
 
   /** Number of training iterations until termination */
+  @Since("1.5.0")
   val totalIterations = objectiveHistory.length
 
 }
@@ -437,6 +454,7 @@ class LinearRegressionTrainingSummary private[regression] (
  * Linear regression results evaluated on a dataset.
  * @param predictions predictions outputted by the model's `transform` method.
  */
+@Since("1.5.0")
 @Experimental
 class LinearRegressionSummary private[regression] (
     @transient val predictions: DataFrame,
@@ -455,33 +473,39 @@ class LinearRegressionSummary private[regression] (
    * explainedVariance = 1 - variance(y - \hat{y}) / variance(y)
    * Reference: [[http://en.wikipedia.org/wiki/Explained_variation]]
    */
+  @Since("1.5.0")
   val explainedVariance: Double = metrics.explainedVariance
 
   /**
    * Returns the mean absolute error, which is a risk function corresponding to the
    * expected value of the absolute error loss or l1-norm loss.
    */
+  @Since("1.5.0")
   val meanAbsoluteError: Double = metrics.meanAbsoluteError
 
   /**
    * Returns the mean squared error, which is a risk function corresponding to the
    * expected value of the squared error loss or quadratic loss.
    */
+  @Since("1.5.0")
   val meanSquaredError: Double = metrics.meanSquaredError
 
   /**
    * Returns the root mean squared error, which is defined as the square root of
    * the mean squared error.
    */
+  @Since("1.5.0")
   val rootMeanSquaredError: Double = metrics.rootMeanSquaredError
 
   /**
    * Returns R^2^, the coefficient of determination.
    * Reference: [[http://en.wikipedia.org/wiki/Coefficient_of_determination]]
    */
+  @Since("1.5.0")
   val r2: Double = metrics.r2
 
   /** Residuals (label - predicted value) */
+  @Since("1.5.0")
   @transient lazy val residuals: DataFrame = {
     val t = udf { (pred: Double, label: Double) => label - pred }
     predictions.select(t(col(predictionCol), col(labelCol)).as("residuals"))
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
index 64fc17247cce..71e40b513ee0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/RandomForestRegressor.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.regression
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{PredictionModel, Predictor}
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.tree.{DecisionTreeModel, RandomForestParams, TreeEnsembleModel, TreeRegressorParams}
@@ -37,44 +37,55 @@ import org.apache.spark.sql.functions._
  * [[http://en.wikipedia.org/wiki/Random_forest  Random Forest]] learning algorithm for regression.
  * It supports both continuous and categorical features.
  */
+@Since("1.4.0")
 @Experimental
-final class RandomForestRegressor(override val uid: String)
+final class RandomForestRegressor @Since("1.4.0") (@Since("1.4.0") override val uid: String)
   extends Predictor[Vector, RandomForestRegressor, RandomForestRegressionModel]
   with RandomForestParams with TreeRegressorParams {
 
+  @Since("1.4.0")
   def this() = this(Identifiable.randomUID("rfr"))
 
   // Override parameter setters from parent trait for Java API compatibility.
 
   // Parameters from TreeRegressorParams:
-
+  @Since("1.4.0")
   override def setMaxDepth(value: Int): this.type = super.setMaxDepth(value)
 
+  @Since("1.4.0")
   override def setMaxBins(value: Int): this.type = super.setMaxBins(value)
 
+  @Since("1.4.0")
   override def setMinInstancesPerNode(value: Int): this.type =
     super.setMinInstancesPerNode(value)
 
+  @Since("1.4.0")
   override def setMinInfoGain(value: Double): this.type = super.setMinInfoGain(value)
 
+  @Since("1.4.0")
   override def setMaxMemoryInMB(value: Int): this.type = super.setMaxMemoryInMB(value)
 
+  @Since("1.4.0")
   override def setCacheNodeIds(value: Boolean): this.type = super.setCacheNodeIds(value)
 
+  @Since("1.4.0")
   override def setCheckpointInterval(value: Int): this.type = super.setCheckpointInterval(value)
 
+  @Since("1.4.0")
   override def setImpurity(value: String): this.type = super.setImpurity(value)
 
   // Parameters from TreeEnsembleParams:
-
+  @Since("1.4.0")
   override def setSubsamplingRate(value: Double): this.type = super.setSubsamplingRate(value)
 
+  @Since("1.4.0")
   override def setSeed(value: Long): this.type = super.setSeed(value)
 
   // Parameters from RandomForestParams:
-
+  @Since("1.4.0")
   override def setNumTrees(value: Int): this.type = super.setNumTrees(value)
 
+  @Since("1.4.0")
   override def setFeatureSubsetStrategy(value: String): this.type =
     super.setFeatureSubsetStrategy(value)
 
@@ -91,15 +102,19 @@ final class RandomForestRegressor(override val uid: String)
     new RandomForestRegressionModel(trees, numFeatures)
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): RandomForestRegressor = defaultCopy(extra)
 }
 
+@Since("1.4.0")
 @Experimental
 object RandomForestRegressor {
   /** Accessor for supported impurity settings: variance */
+  @Since("1.4.0")
   final val supportedImpurities: Array[String] = TreeRegressorParams.supportedImpurities
 
   /** Accessor for supported featureSubsetStrategy settings: auto, all, onethird, sqrt, log2 */
+  @Since("1.4.0")
   final val supportedFeatureSubsetStrategies: Array[String] =
     RandomForestParams.supportedFeatureSubsetStrategies
 }
@@ -111,6 +126,7 @@ object RandomForestRegressor {
  * @param _trees  Decision trees in the ensemble.
  * @param numFeatures  Number of features used by this model
  */
+@Since("1.4.0")
 @Experimental
 final class RandomForestRegressionModel private[ml] (
     override val uid: String,
@@ -128,11 +144,13 @@ final class RandomForestRegressionModel private[ml] (
   private[ml] def this(trees: Array[DecisionTreeRegressionModel], numFeatures: Int) =
     this(Identifiable.randomUID("rfr"), trees, numFeatures)
 
+  @Since("1.4.0")
   override def trees: Array[DecisionTreeModel] = _trees.asInstanceOf[Array[DecisionTreeModel]]
 
   // Note: We may add support for weights (based on tree performance) later on.
   private lazy val _treeWeights: Array[Double] = Array.fill[Double](numTrees)(1.0)
 
+  @Since("1.4.0")
   override def treeWeights: Array[Double] = _treeWeights
 
   override protected def transformImpl(dataset: DataFrame): DataFrame = {
@@ -150,10 +168,12 @@ final class RandomForestRegressionModel private[ml] (
     _trees.map(_.rootNode.predictImpl(features).prediction).sum / numTrees
   }
 
+  @Since("1.4.0")
   override def copy(extra: ParamMap): RandomForestRegressionModel = {
     copyValues(new RandomForestRegressionModel(uid, _trees, numFeatures), extra).setParent(parent)
   }
 
+  @Since("1.4.0")
   override def toString: String = {
     s"RandomForestRegressionModel (uid=$uid) with $numTrees trees"
   }

From 14ee0f5726f96e2c4c28ac328d43fd85a0630b48 Mon Sep 17 00:00:00 2001
From: Travis Hegner <thegner@trilliumit.com>
Date: Thu, 5 Nov 2015 12:35:23 -0800
Subject: [PATCH 516/896] [SPARK-10648] Oracle dialect to handle nonspecific
 numeric types

This is the alternative/agreed upon solution to PR #8780.

Creating an OracleDialect to handle the nonspecific numeric types that can be defined in oracle.

Author: Travis Hegner <thegner@trilliumit.com>

Closes #9495 from travishegner/OracleDialect.
---
 .../apache/spark/sql/jdbc/JdbcDialects.scala  | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index 88ae83957a70..f9a6a09b6270 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -139,6 +139,7 @@ object JdbcDialects {
   registerDialect(DB2Dialect)
   registerDialect(MsSqlServerDialect)
   registerDialect(DerbyDialect)
+  registerDialect(OracleDialect)
 
 
   /**
@@ -315,3 +316,27 @@ case object DerbyDialect extends JdbcDialect {
 
 }
 
+/**
+ * :: DeveloperApi ::
+ * Default Oracle dialect, mapping a nonspecific numeric type to a general decimal type.
+ */
+@DeveloperApi
+case object OracleDialect extends JdbcDialect {
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:oracle")
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    // Handle NUMBER fields that have no precision/scale in special way
+    // because JDBC ResultSetMetaData converts this to 0 procision and -127 scale
+    // For more details, please see
+    // https://github.com/apache/spark/pull/8780#issuecomment-145598968
+    // and
+    // https://github.com/apache/spark/pull/8780#issuecomment-144541760
+    if (sqlType == Types.NUMERIC && size == 0) {
+      // This is sub-optimal as we have to pick a precision/scale in advance whereas the data
+      //  in Oracle is allowed to have different precision/scale for each value.
+      Some(DecimalType(DecimalType.MAX_PRECISION, 10))
+    } else {
+      None
+    }
+  }
+}

From 8a5314efd19fb8f8a194a373fd994b954cc1fd47 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 13:34:36 -0800
Subject: [PATCH 517/896] [SPARK-11532][SQL] Remove implicit conversion from
 Expression to Column

Author: Reynold Xin <rxin@databricks.com>

Closes #9500 from rxin/SPARK-11532.
---
 .../scala/org/apache/spark/sql/Column.scala   | 118 ++++++++++--------
 1 file changed, 66 insertions(+), 52 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index c73f696962de..c32c93897ce0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -68,7 +68,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
   })
 
   /** Creates a column based on the given expression. */
-  implicit private def exprToColumn(newExpr: Expression): Column = new Column(newExpr)
+  private def withExpr(newExpr: Expression): Column = new Column(newExpr)
 
   override def toString: String = expr.prettyString
 
@@ -99,7 +99,9 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def apply(extraction: Any): Column = UnresolvedExtractValue(expr, lit(extraction).expr)
+  def apply(extraction: Any): Column = withExpr {
+    UnresolvedExtractValue(expr, lit(extraction).expr)
+  }
 
   /**
    * Unary minus, i.e. negate the expression.
@@ -115,7 +117,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def unary_- : Column = UnaryMinus(expr)
+  def unary_- : Column = withExpr { UnaryMinus(expr) }
 
   /**
    * Inversion of boolean expression, i.e. NOT.
@@ -131,7 +133,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def unary_! : Column = Not(expr)
+  def unary_! : Column = withExpr { Not(expr) }
 
   /**
    * Equality test.
@@ -147,7 +149,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def === (other: Any): Column = {
+  def === (other: Any): Column = withExpr {
     val right = lit(other).expr
     if (this.expr == right) {
       logWarning(
@@ -188,7 +190,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def !== (other: Any): Column = Not(EqualTo(expr, lit(other).expr))
+  def !== (other: Any): Column = withExpr{ Not(EqualTo(expr, lit(other).expr)) }
 
   /**
    * Inequality test.
@@ -205,7 +207,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group java_expr_ops
    * @since 1.3.0
    */
-  def notEqual(other: Any): Column = Not(EqualTo(expr, lit(other).expr))
+  def notEqual(other: Any): Column = withExpr { Not(EqualTo(expr, lit(other).expr)) }
 
   /**
    * Greater than.
@@ -221,7 +223,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def > (other: Any): Column = GreaterThan(expr, lit(other).expr)
+  def > (other: Any): Column = withExpr { GreaterThan(expr, lit(other).expr) }
 
   /**
    * Greater than.
@@ -252,7 +254,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def < (other: Any): Column = LessThan(expr, lit(other).expr)
+  def < (other: Any): Column = withExpr { LessThan(expr, lit(other).expr) }
 
   /**
    * Less than.
@@ -282,7 +284,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def <= (other: Any): Column = LessThanOrEqual(expr, lit(other).expr)
+  def <= (other: Any): Column = withExpr { LessThanOrEqual(expr, lit(other).expr) }
 
   /**
    * Less than or equal to.
@@ -312,7 +314,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def >= (other: Any): Column = GreaterThanOrEqual(expr, lit(other).expr)
+  def >= (other: Any): Column = withExpr { GreaterThanOrEqual(expr, lit(other).expr) }
 
   /**
    * Greater than or equal to an expression.
@@ -335,7 +337,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def <=> (other: Any): Column = EqualNullSafe(expr, lit(other).expr)
+  def <=> (other: Any): Column = withExpr { EqualNullSafe(expr, lit(other).expr) }
 
   /**
    * Equality test that is safe for null values.
@@ -368,7 +370,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    */
   def when(condition: Column, value: Any): Column = this.expr match {
     case CaseWhen(branches: Seq[Expression]) =>
-      CaseWhen(branches ++ Seq(lit(condition).expr, lit(value).expr))
+      withExpr { CaseWhen(branches ++ Seq(lit(condition).expr, lit(value).expr)) }
     case _ =>
       throw new IllegalArgumentException(
         "when() can only be applied on a Column previously generated by when() function")
@@ -398,7 +400,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
   def otherwise(value: Any): Column = this.expr match {
     case CaseWhen(branches: Seq[Expression]) =>
       if (branches.size % 2 == 0) {
-        CaseWhen(branches :+ lit(value).expr)
+        withExpr { CaseWhen(branches :+ lit(value).expr) }
       } else {
         throw new IllegalArgumentException(
           "otherwise() can only be applied once on a Column previously generated by when()")
@@ -424,7 +426,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.5.0
    */
-  def isNaN: Column = IsNaN(expr)
+  def isNaN: Column = withExpr { IsNaN(expr) }
 
   /**
    * True if the current expression is null.
@@ -432,7 +434,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def isNull: Column = IsNull(expr)
+  def isNull: Column = withExpr { IsNull(expr) }
 
   /**
    * True if the current expression is NOT null.
@@ -440,7 +442,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def isNotNull: Column = IsNotNull(expr)
+  def isNotNull: Column = withExpr { IsNotNull(expr) }
 
   /**
    * Boolean OR.
@@ -455,7 +457,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def || (other: Any): Column = Or(expr, lit(other).expr)
+  def || (other: Any): Column = withExpr { Or(expr, lit(other).expr) }
 
   /**
    * Boolean OR.
@@ -485,7 +487,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def && (other: Any): Column = And(expr, lit(other).expr)
+  def && (other: Any): Column = withExpr { And(expr, lit(other).expr) }
 
   /**
    * Boolean AND.
@@ -515,7 +517,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def + (other: Any): Column = Add(expr, lit(other).expr)
+  def + (other: Any): Column = withExpr { Add(expr, lit(other).expr) }
 
   /**
    * Sum of this expression and another expression.
@@ -545,7 +547,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def - (other: Any): Column = Subtract(expr, lit(other).expr)
+  def - (other: Any): Column = withExpr { Subtract(expr, lit(other).expr) }
 
   /**
    * Subtraction. Subtract the other expression from this expression.
@@ -575,7 +577,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def * (other: Any): Column = Multiply(expr, lit(other).expr)
+  def * (other: Any): Column = withExpr { Multiply(expr, lit(other).expr) }
 
   /**
    * Multiplication of this expression and another expression.
@@ -605,7 +607,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def / (other: Any): Column = Divide(expr, lit(other).expr)
+  def / (other: Any): Column = withExpr { Divide(expr, lit(other).expr) }
 
   /**
    * Division this expression by another expression.
@@ -628,7 +630,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def % (other: Any): Column = Remainder(expr, lit(other).expr)
+  def % (other: Any): Column = withExpr { Remainder(expr, lit(other).expr) }
 
   /**
    * Modulo (a.k.a. remainder) expression.
@@ -657,7 +659,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def isin(list: Any*): Column = In(expr, list.map(lit(_).expr))
+  def isin(list: Any*): Column = withExpr { In(expr, list.map(lit(_).expr)) }
 
   /**
    * SQL like expression.
@@ -665,7 +667,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def like(literal: String): Column = Like(expr, lit(literal).expr)
+  def like(literal: String): Column = withExpr { Like(expr, lit(literal).expr) }
 
   /**
    * SQL RLIKE expression (LIKE with Regex).
@@ -673,7 +675,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def rlike(literal: String): Column = RLike(expr, lit(literal).expr)
+  def rlike(literal: String): Column = withExpr { RLike(expr, lit(literal).expr) }
 
   /**
    * An expression that gets an item at position `ordinal` out of an array,
@@ -682,7 +684,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def getItem(key: Any): Column = UnresolvedExtractValue(expr, Literal(key))
+  def getItem(key: Any): Column = withExpr { UnresolvedExtractValue(expr, Literal(key)) }
 
   /**
    * An expression that gets a field by name in a [[StructType]].
@@ -690,7 +692,9 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def getField(fieldName: String): Column = UnresolvedExtractValue(expr, Literal(fieldName))
+  def getField(fieldName: String): Column = withExpr {
+    UnresolvedExtractValue(expr, Literal(fieldName))
+  }
 
   /**
    * An expression that returns a substring.
@@ -700,7 +704,9 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def substr(startPos: Column, len: Column): Column = Substring(expr, startPos.expr, len.expr)
+  def substr(startPos: Column, len: Column): Column = withExpr {
+    Substring(expr, startPos.expr, len.expr)
+  }
 
   /**
    * An expression that returns a substring.
@@ -710,7 +716,9 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def substr(startPos: Int, len: Int): Column = Substring(expr, lit(startPos).expr, lit(len).expr)
+  def substr(startPos: Int, len: Int): Column = withExpr {
+    Substring(expr, lit(startPos).expr, lit(len).expr)
+  }
 
   /**
    * Contains the other element.
@@ -718,7 +726,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def contains(other: Any): Column = Contains(expr, lit(other).expr)
+  def contains(other: Any): Column = withExpr { Contains(expr, lit(other).expr) }
 
   /**
    * String starts with.
@@ -726,7 +734,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def startsWith(other: Column): Column = StartsWith(expr, lit(other).expr)
+  def startsWith(other: Column): Column = withExpr { StartsWith(expr, lit(other).expr) }
 
   /**
    * String starts with another string literal.
@@ -742,7 +750,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def endsWith(other: Column): Column = EndsWith(expr, lit(other).expr)
+  def endsWith(other: Column): Column = withExpr { EndsWith(expr, lit(other).expr) }
 
   /**
    * String ends with another string literal.
@@ -777,9 +785,11 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def as(alias: String): Column = expr match {
-    case ne: NamedExpression => Alias(expr, alias)(explicitMetadata = Some(ne.metadata))
-    case other => Alias(other, alias)()
+  def as(alias: String): Column = withExpr {
+    expr match {
+      case ne: NamedExpression => Alias(expr, alias)(explicitMetadata = Some(ne.metadata))
+      case other => Alias(other, alias)()
+    }
   }
 
   /**
@@ -792,7 +802,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def as(aliases: Seq[String]): Column = MultiAlias(expr, aliases)
+  def as(aliases: Seq[String]): Column = withExpr { MultiAlias(expr, aliases) }
 
   /**
    * Assigns the given aliases to the results of a table generating function.
@@ -804,7 +814,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def as(aliases: Array[String]): Column = MultiAlias(expr, aliases)
+  def as(aliases: Array[String]): Column = withExpr { MultiAlias(expr, aliases) }
 
   /**
    * Gives the column an alias.
@@ -819,9 +829,11 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def as(alias: Symbol): Column = expr match {
-    case ne: NamedExpression => Alias(expr, alias.name)(explicitMetadata = Some(ne.metadata))
-    case other => Alias(other, alias.name)()
+  def as(alias: Symbol): Column = withExpr {
+    expr match {
+      case ne: NamedExpression => Alias(expr, alias.name)(explicitMetadata = Some(ne.metadata))
+      case other => Alias(other, alias.name)()
+    }
   }
 
   /**
@@ -834,7 +846,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def as(alias: String, metadata: Metadata): Column = {
+  def as(alias: String, metadata: Metadata): Column = withExpr {
     Alias(expr, alias)(explicitMetadata = Some(metadata))
   }
 
@@ -852,10 +864,12 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def cast(to: DataType): Column = expr match {
-    // keeps the name of expression if possible when do cast.
-    case ne: NamedExpression => UnresolvedAlias(Cast(expr, to))
-    case _ => Cast(expr, to)
+  def cast(to: DataType): Column = withExpr {
+    expr match {
+      // keeps the name of expression if possible when do cast.
+      case ne: NamedExpression => UnresolvedAlias(Cast(expr, to))
+      case _ => Cast(expr, to)
+    }
   }
 
   /**
@@ -885,7 +899,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def desc: Column = SortOrder(expr, Descending)
+  def desc: Column = withExpr { SortOrder(expr, Descending) }
 
   /**
    * Returns an ordering used in sorting.
@@ -900,7 +914,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.3.0
    */
-  def asc: Column = SortOrder(expr, Ascending)
+  def asc: Column = withExpr { SortOrder(expr, Ascending) }
 
   /**
    * Prints the expression to the console for debugging purpose.
@@ -927,7 +941,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def bitwiseOR(other: Any): Column = BitwiseOr(expr, lit(other).expr)
+  def bitwiseOR(other: Any): Column = withExpr { BitwiseOr(expr, lit(other).expr) }
 
   /**
    * Compute bitwise AND of this expression with another expression.
@@ -938,7 +952,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def bitwiseAND(other: Any): Column = BitwiseAnd(expr, lit(other).expr)
+  def bitwiseAND(other: Any): Column = withExpr { BitwiseAnd(expr, lit(other).expr) }
 
   /**
    * Compute bitwise XOR of this expression with another expression.
@@ -949,7 +963,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * @group expr_ops
    * @since 1.4.0
    */
-  def bitwiseXOR(other: Any): Column = BitwiseXor(expr, lit(other).expr)
+  def bitwiseXOR(other: Any): Column = withExpr { BitwiseXor(expr, lit(other).expr) }
 
   /**
    * Define a windowing column.

From b9455d1f1810e1e3f472014f665ad3ad3122bcc0 Mon Sep 17 00:00:00 2001
From: adrian555 <wzhuang@us.ibm.com>
Date: Thu, 5 Nov 2015 14:47:38 -0800
Subject: [PATCH 518/896] [SPARK-11260][SPARKR] with() function support

Author: adrian555 <wzhuang@us.ibm.com>
Author: Adrian Zhuang <adrian555@users.noreply.github.com>

Closes #9443 from adrian555/with.
---
 R/pkg/NAMESPACE                  |  1 +
 R/pkg/R/DataFrame.R              | 30 ++++++++++++++++++++++++------
 R/pkg/R/generics.R               |  4 ++++
 R/pkg/R/utils.R                  | 13 +++++++++++++
 R/pkg/inst/tests/test_sparkSQL.R |  9 +++++++++
 5 files changed, 51 insertions(+), 6 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index cd9537a2655f..56b8ed0bf271 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -83,6 +83,7 @@ exportMethods("arrange",
               "unique",
               "unpersist",
               "where",
+              "with",
               "withColumn",
               "withColumnRenamed",
               "write.df")
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index df5bc8137187..44ce9414da5c 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -2126,11 +2126,29 @@ setMethod("as.data.frame",
 setMethod("attach",
           signature(what = "DataFrame"),
           function(what, pos = 2, name = deparse(substitute(what)), warn.conflicts = TRUE) {
-            cols <- columns(what)
-            stopifnot(length(cols) > 0)
-            newEnv <- new.env()
-            for (i in 1:length(cols)) {
-              assign(x = cols[i], value = what[, cols[i]], envir = newEnv)
-            }
+            newEnv <- assignNewEnv(what)
             attach(newEnv, pos = pos, name = name, warn.conflicts = warn.conflicts)
           })
+
+#' Evaluate a R expression in an environment constructed from a DataFrame
+#' with() allows access to columns of a DataFrame by simply referring to
+#' their name. It appends every column of a DataFrame into a new
+#' environment. Then, the given expression is evaluated in this new
+#' environment.
+#'
+#' @rdname with
+#' @title Evaluate a R expression in an environment constructed from a DataFrame
+#' @param data (DataFrame) DataFrame to use for constructing an environment.
+#' @param expr (expression) Expression to evaluate.
+#' @param ... arguments to be passed to future methods.
+#' @examples
+#' \dontrun{
+#' with(irisDf, nrow(Sepal_Width))
+#' }
+#' @seealso \link{attach}
+setMethod("with",
+          signature(data = "DataFrame"),
+          function(data, expr, ...) {
+            newEnv <- assignNewEnv(data)
+            eval(substitute(expr), envir = newEnv, enclos = newEnv)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 0b35340e48e4..083d37fee28a 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -1043,3 +1043,7 @@ setGeneric("as.data.frame")
 #' @rdname attach
 #' @export
 setGeneric("attach")
+
+#' @rdname with
+#' @export
+setGeneric("with")
diff --git a/R/pkg/R/utils.R b/R/pkg/R/utils.R
index 0b9e2957fe9a..db3b2c4bbd79 100644
--- a/R/pkg/R/utils.R
+++ b/R/pkg/R/utils.R
@@ -623,3 +623,16 @@ convertNamedListToEnv <- function(namedList) {
   }
   env
 }
+
+# Assign a new environment for attach() and with() methods
+assignNewEnv <- function(data) {
+  stopifnot(class(data) == "DataFrame")
+  cols <- columns(data)
+  stopifnot(length(cols) > 0)
+
+  env <- new.env()
+  for (i in 1:length(cols)) {
+    assign(x = cols[i], value = data[, cols[i]], envir = env)
+  }
+  env
+}
\ No newline at end of file
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index b4a4d03b2643..816315b1e4e1 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1494,6 +1494,15 @@ test_that("attach() on a DataFrame", {
   expect_error(age)
 })
 
+test_that("with() on a DataFrame", {
+  df <- createDataFrame(sqlContext, iris)
+  expect_error(Sepal_Length)
+  sum1 <- with(df, list(summary(Sepal_Length), summary(Sepal_Width)))
+  expect_equal(collect(sum1[[1]])[1, "Sepal_Length"], "150")
+  sum2 <- with(df, distinct(Sepal_Length))
+  expect_equal(nrow(sum2), 35)
+})
+
 unlink(parquetPath)
 unlink(jsonPath)
 unlink(jsonPathNa)

From d9e30c59cede7f57786bb19e64ba422eda43bdcb Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 5 Nov 2015 14:53:16 -0800
Subject: [PATCH 519/896] [SPARK-10656][SQL] completely support special chars
 in DataFrame

the main problem is: we interpret column name with special handling of `.` for DataFrame. This enables us to write something like `df("a.b")` to get the field `b` of `a`. However, we don't need this feature in `DataFrame.apply("*")` or `DataFrame.withColumnRenamed`. In these 2 cases, the column name is the final name already, we don't need extra process to interpret it.

The solution is simple, use `queryExecution.analyzed.output` to get resolved column directly, instead of using `DataFrame.resolve`.

close https://github.com/apache/spark/pull/8811

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9462 from cloud-fan/special-chars.
---
 .../scala/org/apache/spark/sql/DataFrame.scala   | 16 ++++++++++------
 .../org/apache/spark/sql/DataFrameSuite.scala    |  6 ++++++
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 6336dee7be6a..f2d4db555027 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -698,7 +698,7 @@ class DataFrame private[sql](
    */
   def col(colName: String): Column = colName match {
     case "*" =>
-      Column(ResolvedStar(schema.fieldNames.map(resolve)))
+      Column(ResolvedStar(queryExecution.analyzed.output))
     case _ =>
       val expr = resolve(colName)
       Column(expr)
@@ -1259,13 +1259,17 @@ class DataFrame private[sql](
    */
   def withColumnRenamed(existingName: String, newName: String): DataFrame = {
     val resolver = sqlContext.analyzer.resolver
-    val shouldRename = schema.exists(f => resolver(f.name, existingName))
+    val output = queryExecution.analyzed.output
+    val shouldRename = output.exists(f => resolver(f.name, existingName))
     if (shouldRename) {
-      val colNames = schema.map { field =>
-        val name = field.name
-        if (resolver(name, existingName)) Column(name).as(newName) else Column(name)
+      val columns = output.map { col =>
+        if (resolver(col.name, existingName)) {
+          Column(col).as(newName)
+        } else {
+          Column(col)
+        }
       }
-      select(colNames : _*)
+      select(columns : _*)
     } else {
       this
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 84a616d0b908..f3a7aa280367 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -1128,4 +1128,10 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       }
     }
   }
+
+  test("SPARK-10656: completely support special chars") {
+    val df = Seq(1 -> "a").toDF("i_$.a", "d^'a.")
+    checkAnswer(df.select(df("*")), Row(1, "a"))
+    checkAnswer(df.withColumnRenamed("d^'a.", "a"), Row(1, "a"))
+  }
 }

From b6974f8fed1726a381636e996834111a8e7ced8d Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 15:34:05 -0800
Subject: [PATCH 520/896] [SPARK-11536][SQL] Remove the internal implicit
 conversion from Expression to Column in functions.scala

Author: Reynold Xin <rxin@databricks.com>

Closes #9505 from rxin/SPARK-11536.
---
 .../org/apache/spark/sql/functions.scala      | 580 +++++++++---------
 1 file changed, 299 insertions(+), 281 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index c70c965a9b04..04627589886a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -51,7 +51,7 @@ import org.apache.spark.util.Utils
 object functions {
 // scalastyle:on
 
-  private[this] implicit def toColumn(expr: Expression): Column = Column(expr)
+  private def withExpr(expr: Expression): Column = Column(expr)
 
   /**
    * Returns a [[Column]] based on the given column name.
@@ -128,7 +128,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def approxCountDistinct(e: Column): Column = ApproxCountDistinct(e.expr)
+  def approxCountDistinct(e: Column): Column = withExpr { ApproxCountDistinct(e.expr) }
 
   /**
    * Aggregate function: returns the approximate number of distinct items in a group.
@@ -144,7 +144,9 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def approxCountDistinct(e: Column, rsd: Double): Column = ApproxCountDistinct(e.expr, rsd)
+  def approxCountDistinct(e: Column, rsd: Double): Column = withExpr {
+    ApproxCountDistinct(e.expr, rsd)
+  }
 
   /**
    * Aggregate function: returns the approximate number of distinct items in a group.
@@ -162,7 +164,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def avg(e: Column): Column = Average(e.expr)
+  def avg(e: Column): Column = withExpr { Average(e.expr) }
 
   /**
    * Aggregate function: returns the average of the values in a group.
@@ -178,8 +180,9 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def corr(column1: Column, column2: Column): Column =
+  def corr(column1: Column, column2: Column): Column = withExpr {
     Corr(column1.expr, column2.expr)
+  }
 
   /**
    * Aggregate function: returns the Pearson Correlation Coefficient for two columns.
@@ -187,8 +190,9 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def corr(columnName1: String, columnName2: String): Column =
+  def corr(columnName1: String, columnName2: String): Column = {
     corr(Column(columnName1), Column(columnName2))
+  }
 
   /**
    * Aggregate function: returns the number of items in a group.
@@ -196,10 +200,12 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def count(e: Column): Column = e.expr match {
-    // Turn count(*) into count(1)
-    case s: Star => Count(Literal(1))
-    case _ => Count(e.expr)
+  def count(e: Column): Column = withExpr {
+    e.expr match {
+      // Turn count(*) into count(1)
+      case s: Star => Count(Literal(1))
+      case _ => Count(e.expr)
+    }
   }
 
   /**
@@ -217,8 +223,9 @@ object functions {
    * @since 1.3.0
    */
   @scala.annotation.varargs
-  def countDistinct(expr: Column, exprs: Column*): Column =
+  def countDistinct(expr: Column, exprs: Column*): Column = withExpr {
     CountDistinct((expr +: exprs).map(_.expr))
+  }
 
   /**
    * Aggregate function: returns the number of distinct items in a group.
@@ -236,7 +243,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def first(e: Column): Column = First(e.expr)
+  def first(e: Column): Column = withExpr { First(e.expr) }
 
   /**
    * Aggregate function: returns the first value of a column in a group.
@@ -252,7 +259,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def kurtosis(e: Column): Column = Kurtosis(e.expr)
+  def kurtosis(e: Column): Column = withExpr { Kurtosis(e.expr) }
 
   /**
    * Aggregate function: returns the last value in a group.
@@ -260,7 +267,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def last(e: Column): Column = Last(e.expr)
+  def last(e: Column): Column = withExpr { Last(e.expr) }
 
   /**
    * Aggregate function: returns the last value of the column in a group.
@@ -276,7 +283,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def max(e: Column): Column = Max(e.expr)
+  def max(e: Column): Column = withExpr { Max(e.expr) }
 
   /**
    * Aggregate function: returns the maximum value of the column in a group.
@@ -310,7 +317,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def min(e: Column): Column = Min(e.expr)
+  def min(e: Column): Column = withExpr { Min(e.expr) }
 
   /**
    * Aggregate function: returns the minimum value of the column in a group.
@@ -326,7 +333,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def skewness(e: Column): Column = Skewness(e.expr)
+  def skewness(e: Column): Column = withExpr { Skewness(e.expr) }
 
   /**
    * Aggregate function: alias for [[stddev_samp]].
@@ -334,7 +341,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev(e: Column): Column = StddevSamp(e.expr)
+  def stddev(e: Column): Column = withExpr { StddevSamp(e.expr) }
 
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
@@ -343,7 +350,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev_samp(e: Column): Column = StddevSamp(e.expr)
+  def stddev_samp(e: Column): Column = withExpr { StddevSamp(e.expr) }
 
   /**
    * Aggregate function: returns the population standard deviation of
@@ -352,7 +359,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev_pop(e: Column): Column = StddevPop(e.expr)
+  def stddev_pop(e: Column): Column = withExpr { StddevPop(e.expr) }
 
   /**
    * Aggregate function: returns the sum of all values in the expression.
@@ -360,7 +367,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def sum(e: Column): Column = Sum(e.expr)
+  def sum(e: Column): Column = withExpr { Sum(e.expr) }
 
   /**
    * Aggregate function: returns the sum of all values in the given column.
@@ -376,7 +383,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def sumDistinct(e: Column): Column = SumDistinct(e.expr)
+  def sumDistinct(e: Column): Column = withExpr { SumDistinct(e.expr) }
 
   /**
    * Aggregate function: returns the sum of distinct values in the expression.
@@ -392,7 +399,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def variance(e: Column): Column = VarianceSamp(e.expr)
+  def variance(e: Column): Column = withExpr { VarianceSamp(e.expr) }
 
   /**
    * Aggregate function: returns the unbiased variance of the values in a group.
@@ -400,7 +407,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def var_samp(e: Column): Column = VarianceSamp(e.expr)
+  def var_samp(e: Column): Column = withExpr { VarianceSamp(e.expr) }
 
   /**
    * Aggregate function: returns the population variance of the values in a group.
@@ -408,7 +415,7 @@ object functions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def var_pop(e: Column): Column = VariancePop(e.expr)
+  def var_pop(e: Column): Column = withExpr { VariancePop(e.expr) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Window functions
@@ -429,9 +436,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def cumeDist(): Column = {
-    UnresolvedWindowFunction("cume_dist", Nil)
-  }
+  def cumeDist(): Column = withExpr { UnresolvedWindowFunction("cume_dist", Nil) }
 
   /**
    * Window function: returns the rank of rows within a window partition, without any gaps.
@@ -446,9 +451,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def denseRank(): Column = {
-    UnresolvedWindowFunction("dense_rank", Nil)
-  }
+  def denseRank(): Column = withExpr { UnresolvedWindowFunction("dense_rank", Nil) }
 
   /**
    * Window function: returns the value that is `offset` rows before the current row, and
@@ -460,9 +463,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lag(e: Column, offset: Int): Column = {
-    lag(e, offset, null)
-  }
+  def lag(e: Column, offset: Int): Column = lag(e, offset, null)
 
   /**
    * Window function: returns the value that is `offset` rows before the current row, and
@@ -474,9 +475,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lag(columnName: String, offset: Int): Column = {
-    lag(columnName, offset, null)
-  }
+  def lag(columnName: String, offset: Int): Column = lag(columnName, offset, null)
 
   /**
    * Window function: returns the value that is `offset` rows before the current row, and
@@ -502,7 +501,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lag(e: Column, offset: Int, defaultValue: Any): Column = {
+  def lag(e: Column, offset: Int, defaultValue: Any): Column = withExpr {
     UnresolvedWindowFunction("lag", e.expr :: Literal(offset) :: Literal(defaultValue) :: Nil)
   }
 
@@ -516,9 +515,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lead(columnName: String, offset: Int): Column = {
-    lead(columnName, offset, null)
-  }
+  def lead(columnName: String, offset: Int): Column = { lead(columnName, offset, null) }
 
   /**
    * Window function: returns the value that is `offset` rows after the current row, and
@@ -530,9 +527,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lead(e: Column, offset: Int): Column = {
-    lead(e, offset, null)
-  }
+  def lead(e: Column, offset: Int): Column = { lead(e, offset, null) }
 
   /**
    * Window function: returns the value that is `offset` rows after the current row, and
@@ -558,7 +553,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def lead(e: Column, offset: Int, defaultValue: Any): Column = {
+  def lead(e: Column, offset: Int, defaultValue: Any): Column = withExpr {
     UnresolvedWindowFunction("lead", e.expr :: Literal(offset) :: Literal(defaultValue) :: Nil)
   }
 
@@ -572,9 +567,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def ntile(n: Int): Column = {
-    UnresolvedWindowFunction("ntile", lit(n).expr :: Nil)
-  }
+  def ntile(n: Int): Column = withExpr { UnresolvedWindowFunction("ntile", lit(n).expr :: Nil) }
 
   /**
    * Window function: returns the relative rank (i.e. percentile) of rows within a window partition.
@@ -589,9 +582,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def percentRank(): Column = {
-    UnresolvedWindowFunction("percent_rank", Nil)
-  }
+  def percentRank(): Column = withExpr { UnresolvedWindowFunction("percent_rank", Nil) }
 
   /**
    * Window function: returns the rank of rows within a window partition.
@@ -606,9 +597,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def rank(): Column = {
-    UnresolvedWindowFunction("rank", Nil)
-  }
+  def rank(): Column = withExpr { UnresolvedWindowFunction("rank", Nil) }
 
   /**
    * Window function: returns a sequential number starting at 1 within a window partition.
@@ -618,9 +607,7 @@ object functions {
    * @group window_funcs
    * @since 1.4.0
    */
-  def rowNumber(): Column = {
-    UnresolvedWindowFunction("row_number", Nil)
-  }
+  def rowNumber(): Column = withExpr { UnresolvedWindowFunction("row_number", Nil) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Non-aggregate functions
@@ -632,7 +619,7 @@ object functions {
    * @group normal_funcs
    * @since 1.3.0
    */
-  def abs(e: Column): Column = Abs(e.expr)
+  def abs(e: Column): Column = withExpr { Abs(e.expr) }
 
   /**
    * Creates a new array column. The input columns must all have the same data type.
@@ -641,7 +628,7 @@ object functions {
    * @since 1.4.0
    */
   @scala.annotation.varargs
-  def array(cols: Column*): Column = CreateArray(cols.map(_.expr))
+  def array(cols: Column*): Column = withExpr { CreateArray(cols.map(_.expr)) }
 
   /**
    * Creates a new array column. The input columns must all have the same data type.
@@ -679,14 +666,14 @@ object functions {
    * @since 1.3.0
    */
   @scala.annotation.varargs
-  def coalesce(e: Column*): Column = Coalesce(e.map(_.expr))
+  def coalesce(e: Column*): Column = withExpr { Coalesce(e.map(_.expr)) }
 
   /**
    * Creates a string column for the file name of the current Spark task.
    *
    * @group normal_funcs
    */
-  def inputFileName(): Column = InputFileName()
+  def inputFileName(): Column = withExpr { InputFileName() }
 
   /**
    * Return true iff the column is NaN.
@@ -694,7 +681,7 @@ object functions {
    * @group normal_funcs
    * @since 1.5.0
    */
-  def isNaN(e: Column): Column = IsNaN(e.expr)
+  def isNaN(e: Column): Column = withExpr { IsNaN(e.expr) }
 
   /**
    * A column expression that generates monotonically increasing 64-bit integers.
@@ -711,7 +698,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def monotonicallyIncreasingId(): Column = MonotonicallyIncreasingID()
+  def monotonicallyIncreasingId(): Column = withExpr { MonotonicallyIncreasingID() }
 
   /**
    * Returns col1 if it is not NaN, or col2 if col1 is NaN.
@@ -721,7 +708,7 @@ object functions {
    * @group normal_funcs
    * @since 1.5.0
    */
-  def nanvl(col1: Column, col2: Column): Column = NaNvl(col1.expr, col2.expr)
+  def nanvl(col1: Column, col2: Column): Column = withExpr { NaNvl(col1.expr, col2.expr) }
 
   /**
    * Unary minus, i.e. negate the expression.
@@ -760,7 +747,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def rand(seed: Long): Column = Rand(seed)
+  def rand(seed: Long): Column = withExpr { Rand(seed) }
 
   /**
    * Generate a random column with i.i.d. samples from U[0.0, 1.0].
@@ -776,7 +763,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def randn(seed: Long): Column = Randn(seed)
+  def randn(seed: Long): Column = withExpr { Randn(seed) }
 
   /**
    * Generate a column with i.i.d. samples from the standard normal distribution.
@@ -794,7 +781,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def sparkPartitionId(): Column = SparkPartitionID()
+  def sparkPartitionId(): Column = withExpr { SparkPartitionID() }
 
   /**
    * Computes the square root of the specified float value.
@@ -802,7 +789,7 @@ object functions {
    * @group math_funcs
    * @since 1.3.0
    */
-  def sqrt(e: Column): Column = Sqrt(e.expr)
+  def sqrt(e: Column): Column = withExpr { Sqrt(e.expr) }
 
   /**
    * Computes the square root of the specified float value.
@@ -823,9 +810,7 @@ object functions {
    * @since 1.4.0
    */
   @scala.annotation.varargs
-  def struct(cols: Column*): Column = {
-    CreateStruct(cols.map(_.expr))
-  }
+  def struct(cols: Column*): Column = withExpr { CreateStruct(cols.map(_.expr)) }
 
   /**
    * Creates a new struct column that composes multiple input columns.
@@ -858,7 +843,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def when(condition: Column, value: Any): Column = {
+  def when(condition: Column, value: Any): Column = withExpr {
     CaseWhen(Seq(condition.expr, lit(value).expr))
   }
 
@@ -868,7 +853,7 @@ object functions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def bitwiseNOT(e: Column): Column = BitwiseNot(e.expr)
+  def bitwiseNOT(e: Column): Column = withExpr { BitwiseNot(e.expr) }
 
   /**
    * Parses the expression string into the column that it represents, similar to
@@ -893,7 +878,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def acos(e: Column): Column = Acos(e.expr)
+  def acos(e: Column): Column = withExpr { Acos(e.expr) }
 
   /**
    * Computes the cosine inverse of the given column; the returned angle is in the range
@@ -911,7 +896,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def asin(e: Column): Column = Asin(e.expr)
+  def asin(e: Column): Column = withExpr { Asin(e.expr) }
 
   /**
    * Computes the sine inverse of the given column; the returned angle is in the range
@@ -928,7 +913,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def atan(e: Column): Column = Atan(e.expr)
+  def atan(e: Column): Column = withExpr { Atan(e.expr) }
 
   /**
    * Computes the tangent inverse of the given column.
@@ -945,7 +930,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def atan2(l: Column, r: Column): Column = Atan2(l.expr, r.expr)
+  def atan2(l: Column, r: Column): Column = withExpr { Atan2(l.expr, r.expr) }
 
   /**
    * Returns the angle theta from the conversion of rectangular coordinates (x, y) to
@@ -982,7 +967,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def atan2(l: Column, r: Double): Column = atan2(l, lit(r).expr)
+  def atan2(l: Column, r: Double): Column = atan2(l, lit(r))
 
   /**
    * Returns the angle theta from the conversion of rectangular coordinates (x, y) to
@@ -1000,7 +985,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def atan2(l: Double, r: Column): Column = atan2(lit(l).expr, r)
+  def atan2(l: Double, r: Column): Column = atan2(lit(l), r)
 
   /**
    * Returns the angle theta from the conversion of rectangular coordinates (x, y) to
@@ -1018,7 +1003,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def bin(e: Column): Column = Bin(e.expr)
+  def bin(e: Column): Column = withExpr { Bin(e.expr) }
 
   /**
    * An expression that returns the string representation of the binary value of the given long
@@ -1035,7 +1020,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def cbrt(e: Column): Column = Cbrt(e.expr)
+  def cbrt(e: Column): Column = withExpr { Cbrt(e.expr) }
 
   /**
    * Computes the cube-root of the given column.
@@ -1051,7 +1036,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def ceil(e: Column): Column = Ceil(e.expr)
+  def ceil(e: Column): Column = withExpr { Ceil(e.expr) }
 
   /**
    * Computes the ceiling of the given column.
@@ -1067,8 +1052,9 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def conv(num: Column, fromBase: Int, toBase: Int): Column =
+  def conv(num: Column, fromBase: Int, toBase: Int): Column = withExpr {
     Conv(num.expr, lit(fromBase).expr, lit(toBase).expr)
+  }
 
   /**
    * Computes the cosine of the given value.
@@ -1076,7 +1062,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def cos(e: Column): Column = Cos(e.expr)
+  def cos(e: Column): Column = withExpr { Cos(e.expr) }
 
   /**
    * Computes the cosine of the given column.
@@ -1092,7 +1078,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def cosh(e: Column): Column = Cosh(e.expr)
+  def cosh(e: Column): Column = withExpr { Cosh(e.expr) }
 
   /**
    * Computes the hyperbolic cosine of the given column.
@@ -1108,7 +1094,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def exp(e: Column): Column = Exp(e.expr)
+  def exp(e: Column): Column = withExpr { Exp(e.expr) }
 
   /**
    * Computes the exponential of the given column.
@@ -1124,7 +1110,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def expm1(e: Column): Column = Expm1(e.expr)
+  def expm1(e: Column): Column = withExpr { Expm1(e.expr) }
 
   /**
    * Computes the exponential of the given column.
@@ -1140,7 +1126,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def factorial(e: Column): Column = Factorial(e.expr)
+  def factorial(e: Column): Column = withExpr { Factorial(e.expr) }
 
   /**
    * Computes the floor of the given value.
@@ -1148,7 +1134,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def floor(e: Column): Column = Floor(e.expr)
+  def floor(e: Column): Column = withExpr { Floor(e.expr) }
 
   /**
    * Computes the floor of the given column.
@@ -1166,7 +1152,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def greatest(exprs: Column*): Column = {
+  def greatest(exprs: Column*): Column = withExpr {
     require(exprs.length > 1, "greatest requires at least 2 arguments.")
     Greatest(exprs.map(_.expr))
   }
@@ -1189,7 +1175,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def hex(column: Column): Column = Hex(column.expr)
+  def hex(column: Column): Column = withExpr { Hex(column.expr) }
 
   /**
    * Inverse of hex. Interprets each pair of characters as a hexadecimal number
@@ -1198,7 +1184,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def unhex(column: Column): Column = Unhex(column.expr)
+  def unhex(column: Column): Column = withExpr { Unhex(column.expr) }
 
   /**
    * Computes `sqrt(a^2^ + b^2^)` without intermediate overflow or underflow.
@@ -1206,7 +1192,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def hypot(l: Column, r: Column): Column = Hypot(l.expr, r.expr)
+  def hypot(l: Column, r: Column): Column = withExpr { Hypot(l.expr, r.expr) }
 
   /**
    * Computes `sqrt(a^2^ + b^2^)` without intermediate overflow or underflow.
@@ -1239,7 +1225,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def hypot(l: Column, r: Double): Column = hypot(l, lit(r).expr)
+  def hypot(l: Column, r: Double): Column = hypot(l, lit(r))
 
   /**
    * Computes `sqrt(a^2^ + b^2^)` without intermediate overflow or underflow.
@@ -1255,7 +1241,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def hypot(l: Double, r: Column): Column = hypot(lit(l).expr, r)
+  def hypot(l: Double, r: Column): Column = hypot(lit(l), r)
 
   /**
    * Computes `sqrt(a^2^ + b^2^)` without intermediate overflow or underflow.
@@ -1273,7 +1259,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def least(exprs: Column*): Column = {
+  def least(exprs: Column*): Column = withExpr {
     require(exprs.length > 1, "least requires at least 2 arguments.")
     Least(exprs.map(_.expr))
   }
@@ -1296,7 +1282,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def log(e: Column): Column = Log(e.expr)
+  def log(e: Column): Column = withExpr { Log(e.expr) }
 
   /**
    * Computes the natural logarithm of the given column.
@@ -1312,7 +1298,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def log(base: Double, a: Column): Column = Logarithm(lit(base).expr, a.expr)
+  def log(base: Double, a: Column): Column = withExpr { Logarithm(lit(base).expr, a.expr) }
 
   /**
    * Returns the first argument-base logarithm of the second argument.
@@ -1328,7 +1314,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def log10(e: Column): Column = Log10(e.expr)
+  def log10(e: Column): Column = withExpr { Log10(e.expr) }
 
   /**
    * Computes the logarithm of the given value in base 10.
@@ -1344,7 +1330,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def log1p(e: Column): Column = Log1p(e.expr)
+  def log1p(e: Column): Column = withExpr { Log1p(e.expr) }
 
   /**
    * Computes the natural logarithm of the given column plus one.
@@ -1360,7 +1346,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def log2(expr: Column): Column = Log2(expr.expr)
+  def log2(expr: Column): Column = withExpr { Log2(expr.expr) }
 
   /**
    * Computes the logarithm of the given value in base 2.
@@ -1376,7 +1362,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def pow(l: Column, r: Column): Column = Pow(l.expr, r.expr)
+  def pow(l: Column, r: Column): Column = withExpr { Pow(l.expr, r.expr) }
 
   /**
    * Returns the value of the first argument raised to the power of the second argument.
@@ -1408,7 +1394,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def pow(l: Column, r: Double): Column = pow(l, lit(r).expr)
+  def pow(l: Column, r: Double): Column = pow(l, lit(r))
 
   /**
    * Returns the value of the first argument raised to the power of the second argument.
@@ -1424,7 +1410,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def pow(l: Double, r: Column): Column = pow(lit(l).expr, r)
+  def pow(l: Double, r: Column): Column = pow(lit(l), r)
 
   /**
    * Returns the value of the first argument raised to the power of the second argument.
@@ -1440,7 +1426,9 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def pmod(dividend: Column, divisor: Column): Column = Pmod(dividend.expr, divisor.expr)
+  def pmod(dividend: Column, divisor: Column): Column = withExpr {
+    Pmod(dividend.expr, divisor.expr)
+  }
 
   /**
    * Returns the double value that is closest in value to the argument and
@@ -1449,7 +1437,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def rint(e: Column): Column = Rint(e.expr)
+  def rint(e: Column): Column = withExpr { Rint(e.expr) }
 
   /**
    * Returns the double value that is closest in value to the argument and
@@ -1466,7 +1454,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def round(e: Column): Column = round(e.expr, 0)
+  def round(e: Column): Column = round(e, 0)
 
   /**
    * Round the value of `e` to `scale` decimal places if `scale` >= 0
@@ -1475,7 +1463,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def round(e: Column, scale: Int): Column = Round(e.expr, Literal(scale))
+  def round(e: Column, scale: Int): Column = withExpr { Round(e.expr, Literal(scale)) }
 
   /**
    * Shift the the given value numBits left. If the given value is a long value, this function
@@ -1484,7 +1472,7 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def shiftLeft(e: Column, numBits: Int): Column = ShiftLeft(e.expr, lit(numBits).expr)
+  def shiftLeft(e: Column, numBits: Int): Column = withExpr { ShiftLeft(e.expr, lit(numBits).expr) }
 
   /**
    * Shift the the given value numBits right. If the given value is a long value, it will return
@@ -1493,7 +1481,9 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def shiftRight(e: Column, numBits: Int): Column = ShiftRight(e.expr, lit(numBits).expr)
+  def shiftRight(e: Column, numBits: Int): Column = withExpr {
+    ShiftRight(e.expr, lit(numBits).expr)
+  }
 
   /**
    * Unsigned shift the the given value numBits right. If the given value is a long value,
@@ -1502,8 +1492,9 @@ object functions {
    * @group math_funcs
    * @since 1.5.0
    */
-  def shiftRightUnsigned(e: Column, numBits: Int): Column =
+  def shiftRightUnsigned(e: Column, numBits: Int): Column = withExpr {
     ShiftRightUnsigned(e.expr, lit(numBits).expr)
+  }
 
   /**
    * Computes the signum of the given value.
@@ -1511,7 +1502,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def signum(e: Column): Column = Signum(e.expr)
+  def signum(e: Column): Column = withExpr { Signum(e.expr) }
 
   /**
    * Computes the signum of the given column.
@@ -1527,7 +1518,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def sin(e: Column): Column = Sin(e.expr)
+  def sin(e: Column): Column = withExpr { Sin(e.expr) }
 
   /**
    * Computes the sine of the given column.
@@ -1543,7 +1534,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def sinh(e: Column): Column = Sinh(e.expr)
+  def sinh(e: Column): Column = withExpr { Sinh(e.expr) }
 
   /**
    * Computes the hyperbolic sine of the given column.
@@ -1559,7 +1550,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def tan(e: Column): Column = Tan(e.expr)
+  def tan(e: Column): Column = withExpr { Tan(e.expr) }
 
   /**
    * Computes the tangent of the given column.
@@ -1575,7 +1566,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def tanh(e: Column): Column = Tanh(e.expr)
+  def tanh(e: Column): Column = withExpr { Tanh(e.expr) }
 
   /**
    * Computes the hyperbolic tangent of the given column.
@@ -1591,7 +1582,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def toDegrees(e: Column): Column = ToDegrees(e.expr)
+  def toDegrees(e: Column): Column = withExpr { ToDegrees(e.expr) }
 
   /**
    * Converts an angle measured in radians to an approximately equivalent angle measured in degrees.
@@ -1607,7 +1598,7 @@ object functions {
    * @group math_funcs
    * @since 1.4.0
    */
-  def toRadians(e: Column): Column = ToRadians(e.expr)
+  def toRadians(e: Column): Column = withExpr { ToRadians(e.expr) }
 
   /**
    * Converts an angle measured in degrees to an approximately equivalent angle measured in radians.
@@ -1628,7 +1619,7 @@ object functions {
    * @group misc_funcs
    * @since 1.5.0
    */
-  def md5(e: Column): Column = Md5(e.expr)
+  def md5(e: Column): Column = withExpr { Md5(e.expr) }
 
   /**
    * Calculates the SHA-1 digest of a binary column and returns the value
@@ -1637,7 +1628,7 @@ object functions {
    * @group misc_funcs
    * @since 1.5.0
    */
-  def sha1(e: Column): Column = Sha1(e.expr)
+  def sha1(e: Column): Column = withExpr { Sha1(e.expr) }
 
   /**
    * Calculates the SHA-2 family of hash functions of a binary column and
@@ -1652,7 +1643,7 @@ object functions {
   def sha2(e: Column, numBits: Int): Column = {
     require(Seq(0, 224, 256, 384, 512).contains(numBits),
       s"numBits $numBits is not in the permitted values (0, 224, 256, 384, 512)")
-    Sha2(e.expr, lit(numBits).expr)
+    withExpr { Sha2(e.expr, lit(numBits).expr) }
   }
 
   /**
@@ -1662,7 +1653,7 @@ object functions {
    * @group misc_funcs
    * @since 1.5.0
    */
-  def crc32(e: Column): Column = Crc32(e.expr)
+  def crc32(e: Column): Column = withExpr { Crc32(e.expr) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // String functions
@@ -1675,7 +1666,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def ascii(e: Column): Column = Ascii(e.expr)
+  def ascii(e: Column): Column = withExpr { Ascii(e.expr) }
 
   /**
    * Computes the BASE64 encoding of a binary column and returns it as a string column.
@@ -1684,7 +1675,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def base64(e: Column): Column = Base64(e.expr)
+  def base64(e: Column): Column = withExpr { Base64(e.expr) }
 
   /**
    * Concatenates multiple input string columns together into a single string column.
@@ -1693,7 +1684,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def concat(exprs: Column*): Column = Concat(exprs.map(_.expr))
+  def concat(exprs: Column*): Column = withExpr { Concat(exprs.map(_.expr)) }
 
   /**
    * Concatenates multiple input string columns together into a single string column,
@@ -1703,7 +1694,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def concat_ws(sep: String, exprs: Column*): Column = {
+  def concat_ws(sep: String, exprs: Column*): Column = withExpr {
     ConcatWs(Literal.create(sep, StringType) +: exprs.map(_.expr))
   }
 
@@ -1715,7 +1706,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def decode(value: Column, charset: String): Column = Decode(value.expr, lit(charset).expr)
+  def decode(value: Column, charset: String): Column = withExpr {
+    Decode(value.expr, lit(charset).expr)
+  }
 
   /**
    * Computes the first argument into a binary from a string using the provided character set
@@ -1725,7 +1718,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def encode(value: Column, charset: String): Column = Encode(value.expr, lit(charset).expr)
+  def encode(value: Column, charset: String): Column = withExpr {
+    Encode(value.expr, lit(charset).expr)
+  }
 
   /**
    * Formats numeric column x to a format like '#,###,###.##', rounded to d decimal places,
@@ -1737,7 +1732,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def format_number(x: Column, d: Int): Column = FormatNumber(x.expr, lit(d).expr)
+  def format_number(x: Column, d: Int): Column = withExpr {
+    FormatNumber(x.expr, lit(d).expr)
+  }
 
   /**
    * Formats the arguments in printf-style and returns the result as a string column.
@@ -1746,7 +1743,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def format_string(format: String, arguments: Column*): Column = {
+  def format_string(format: String, arguments: Column*): Column = withExpr {
     FormatString((lit(format) +: arguments).map(_.expr): _*)
   }
 
@@ -1759,7 +1756,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def initcap(e: Column): Column = InitCap(e.expr)
+  def initcap(e: Column): Column = withExpr { InitCap(e.expr) }
 
   /**
    * Locate the position of the first occurrence of substr column in the given string.
@@ -1771,7 +1768,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def instr(str: Column, substring: String): Column = StringInstr(str.expr, lit(substring).expr)
+  def instr(str: Column, substring: String): Column = withExpr {
+    StringInstr(str.expr, lit(substring).expr)
+  }
 
   /**
    * Computes the length of a given string or binary column.
@@ -1779,7 +1778,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def length(e: Column): Column = Length(e.expr)
+  def length(e: Column): Column = withExpr { Length(e.expr) }
 
   /**
    * Converts a string column to lower case.
@@ -1787,14 +1786,14 @@ object functions {
    * @group string_funcs
    * @since 1.3.0
    */
-  def lower(e: Column): Column = Lower(e.expr)
+  def lower(e: Column): Column = withExpr { Lower(e.expr) }
 
   /**
    * Computes the Levenshtein distance of the two given string columns.
    * @group string_funcs
    * @since 1.5.0
    */
-  def levenshtein(l: Column, r: Column): Column = Levenshtein(l.expr, r.expr)
+  def levenshtein(l: Column, r: Column): Column = withExpr { Levenshtein(l.expr, r.expr) }
 
   /**
    * Locate the position of the first occurrence of substr.
@@ -1804,7 +1803,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def locate(substr: String, str: Column): Column = {
+  def locate(substr: String, str: Column): Column = withExpr {
     new StringLocate(lit(substr).expr, str.expr)
   }
 
@@ -1817,7 +1816,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def locate(substr: String, str: Column, pos: Int): Column = {
+  def locate(substr: String, str: Column, pos: Int): Column = withExpr {
     StringLocate(lit(substr).expr, str.expr, lit(pos).expr)
   }
 
@@ -1827,7 +1826,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def lpad(str: Column, len: Int, pad: String): Column = {
+  def lpad(str: Column, len: Int, pad: String): Column = withExpr {
     StringLPad(str.expr, lit(len).expr, lit(pad).expr)
   }
 
@@ -1837,7 +1836,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def ltrim(e: Column): Column = StringTrimLeft(e.expr)
+  def ltrim(e: Column): Column = withExpr {StringTrimLeft(e.expr) }
 
   /**
    * Extract a specific(idx) group identified by a java regex, from the specified string column.
@@ -1845,7 +1844,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def regexp_extract(e: Column, exp: String, groupIdx: Int): Column = {
+  def regexp_extract(e: Column, exp: String, groupIdx: Int): Column = withExpr {
     RegExpExtract(e.expr, lit(exp).expr, lit(groupIdx).expr)
   }
 
@@ -1855,7 +1854,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def regexp_replace(e: Column, pattern: String, replacement: String): Column = {
+  def regexp_replace(e: Column, pattern: String, replacement: String): Column = withExpr {
     RegExpReplace(e.expr, lit(pattern).expr, lit(replacement).expr)
   }
 
@@ -1866,7 +1865,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def unbase64(e: Column): Column = UnBase64(e.expr)
+  def unbase64(e: Column): Column = withExpr { UnBase64(e.expr) }
 
   /**
    * Right-padded with pad to a length of len.
@@ -1874,7 +1873,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def rpad(str: Column, len: Int, pad: String): Column = {
+  def rpad(str: Column, len: Int, pad: String): Column = withExpr {
     StringRPad(str.expr, lit(len).expr, lit(pad).expr)
   }
 
@@ -1884,7 +1883,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def repeat(str: Column, n: Int): Column = {
+  def repeat(str: Column, n: Int): Column = withExpr {
     StringRepeat(str.expr, lit(n).expr)
   }
 
@@ -1894,9 +1893,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def reverse(str: Column): Column = {
-    StringReverse(str.expr)
-  }
+  def reverse(str: Column): Column = withExpr { StringReverse(str.expr) }
 
   /**
    * Trim the spaces from right end for the specified string value.
@@ -1904,7 +1901,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def rtrim(e: Column): Column = StringTrimRight(e.expr)
+  def rtrim(e: Column): Column = withExpr { StringTrimRight(e.expr) }
 
   /**
    * * Return the soundex code for the specified expression.
@@ -1912,7 +1909,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def soundex(e: Column): Column = SoundEx(e.expr)
+  def soundex(e: Column): Column = withExpr { SoundEx(e.expr) }
 
   /**
    * Splits str around pattern (pattern is a regular expression).
@@ -1921,7 +1918,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def split(str: Column, pattern: String): Column = {
+  def split(str: Column, pattern: String): Column = withExpr {
     StringSplit(str.expr, lit(pattern).expr)
   }
 
@@ -1933,8 +1930,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def substring(str: Column, pos: Int, len: Int): Column =
+  def substring(str: Column, pos: Int, len: Int): Column = withExpr {
     Substring(str.expr, lit(pos).expr, lit(len).expr)
+  }
 
   /**
    * Returns the substring from string str before count occurrences of the delimiter delim.
@@ -1944,8 +1942,9 @@ object functions {
    *
    * @group string_funcs
    */
-  def substring_index(str: Column, delim: String, count: Int): Column =
+  def substring_index(str: Column, delim: String, count: Int): Column = withExpr {
     SubstringIndex(str.expr, lit(delim).expr, lit(count).expr)
+  }
 
   /**
    * Translate any character in the src by a character in replaceString.
@@ -1956,8 +1955,9 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def translate(src: Column, matchingString: String, replaceString: String): Column =
+  def translate(src: Column, matchingString: String, replaceString: String): Column = withExpr {
     StringTranslate(src.expr, lit(matchingString).expr, lit(replaceString).expr)
+  }
 
   /**
    * Trim the spaces from both ends for the specified string column.
@@ -1965,7 +1965,7 @@ object functions {
    * @group string_funcs
    * @since 1.5.0
    */
-  def trim(e: Column): Column = StringTrim(e.expr)
+  def trim(e: Column): Column = withExpr { StringTrim(e.expr) }
 
   /**
    * Converts a string column to upper case.
@@ -1973,7 +1973,7 @@ object functions {
    * @group string_funcs
    * @since 1.3.0
    */
-  def upper(e: Column): Column = Upper(e.expr)
+  def upper(e: Column): Column = withExpr { Upper(e.expr) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // DateTime functions
@@ -1985,8 +1985,9 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def add_months(startDate: Column, numMonths: Int): Column =
+  def add_months(startDate: Column, numMonths: Int): Column = withExpr {
     AddMonths(startDate.expr, Literal(numMonths))
+  }
 
   /**
    * Returns the current date as a date column.
@@ -1994,7 +1995,7 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def current_date(): Column = CurrentDate()
+  def current_date(): Column = withExpr { CurrentDate() }
 
   /**
    * Returns the current timestamp as a timestamp column.
@@ -2002,7 +2003,7 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def current_timestamp(): Column = CurrentTimestamp()
+  def current_timestamp(): Column = withExpr { CurrentTimestamp() }
 
   /**
    * Converts a date/timestamp/string to a value of string in the format specified by the date
@@ -2017,71 +2018,72 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def date_format(dateExpr: Column, format: String): Column =
+  def date_format(dateExpr: Column, format: String): Column = withExpr {
     DateFormatClass(dateExpr.expr, Literal(format))
+  }
 
   /**
    * Returns the date that is `days` days after `start`
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def date_add(start: Column, days: Int): Column = DateAdd(start.expr, Literal(days))
+  def date_add(start: Column, days: Int): Column = withExpr { DateAdd(start.expr, Literal(days)) }
 
   /**
    * Returns the date that is `days` days before `start`
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def date_sub(start: Column, days: Int): Column = DateSub(start.expr, Literal(days))
+  def date_sub(start: Column, days: Int): Column = withExpr { DateSub(start.expr, Literal(days)) }
 
   /**
    * Returns the number of days from `start` to `end`.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def datediff(end: Column, start: Column): Column = DateDiff(end.expr, start.expr)
+  def datediff(end: Column, start: Column): Column = withExpr { DateDiff(end.expr, start.expr) }
 
   /**
    * Extracts the year as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def year(e: Column): Column = Year(e.expr)
+  def year(e: Column): Column = withExpr { Year(e.expr) }
 
   /**
    * Extracts the quarter as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def quarter(e: Column): Column = Quarter(e.expr)
+  def quarter(e: Column): Column = withExpr { Quarter(e.expr) }
 
   /**
    * Extracts the month as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def month(e: Column): Column = Month(e.expr)
+  def month(e: Column): Column = withExpr { Month(e.expr) }
 
   /**
    * Extracts the day of the month as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def dayofmonth(e: Column): Column = DayOfMonth(e.expr)
+  def dayofmonth(e: Column): Column = withExpr { DayOfMonth(e.expr) }
 
   /**
    * Extracts the day of the year as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def dayofyear(e: Column): Column = DayOfYear(e.expr)
+  def dayofyear(e: Column): Column = withExpr { DayOfYear(e.expr) }
 
   /**
    * Extracts the hours as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def hour(e: Column): Column = Hour(e.expr)
+  def hour(e: Column): Column = withExpr { Hour(e.expr) }
 
   /**
    * Given a date column, returns the last day of the month which the given date belongs to.
@@ -2091,21 +2093,23 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def last_day(e: Column): Column = LastDay(e.expr)
+  def last_day(e: Column): Column = withExpr { LastDay(e.expr) }
 
   /**
    * Extracts the minutes as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def minute(e: Column): Column = Minute(e.expr)
+  def minute(e: Column): Column = withExpr { Minute(e.expr) }
 
   /*
    * Returns number of months between dates `date1` and `date2`.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def months_between(date1: Column, date2: Column): Column = MonthsBetween(date1.expr, date2.expr)
+  def months_between(date1: Column, date2: Column): Column = withExpr {
+    MonthsBetween(date1.expr, date2.expr)
+  }
 
   /**
    * Given a date column, returns the first date which is later than the value of the date column
@@ -2120,21 +2124,23 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def next_day(date: Column, dayOfWeek: String): Column = NextDay(date.expr, lit(dayOfWeek).expr)
+  def next_day(date: Column, dayOfWeek: String): Column = withExpr {
+    NextDay(date.expr, lit(dayOfWeek).expr)
+  }
 
   /**
    * Extracts the seconds as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def second(e: Column): Column = Second(e.expr)
+  def second(e: Column): Column = withExpr { Second(e.expr) }
 
   /**
    * Extracts the week number as an integer from a given date/timestamp/string.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def weekofyear(e: Column): Column = WeekOfYear(e.expr)
+  def weekofyear(e: Column): Column = withExpr { WeekOfYear(e.expr) }
 
   /**
    * Converts the number of seconds from unix epoch (1970-01-01 00:00:00 UTC) to a string
@@ -2143,7 +2149,9 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def from_unixtime(ut: Column): Column = FromUnixTime(ut.expr, Literal("yyyy-MM-dd HH:mm:ss"))
+  def from_unixtime(ut: Column): Column = withExpr {
+    FromUnixTime(ut.expr, Literal("yyyy-MM-dd HH:mm:ss"))
+  }
 
   /**
    * Converts the number of seconds from unix epoch (1970-01-01 00:00:00 UTC) to a string
@@ -2152,14 +2160,18 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def from_unixtime(ut: Column, f: String): Column = FromUnixTime(ut.expr, Literal(f))
+  def from_unixtime(ut: Column, f: String): Column = withExpr {
+    FromUnixTime(ut.expr, Literal(f))
+  }
 
   /**
    * Gets current Unix timestamp in seconds.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def unix_timestamp(): Column = UnixTimestamp(CurrentTimestamp(), Literal("yyyy-MM-dd HH:mm:ss"))
+  def unix_timestamp(): Column = withExpr {
+    UnixTimestamp(CurrentTimestamp(), Literal("yyyy-MM-dd HH:mm:ss"))
+  }
 
   /**
    * Converts time string in format yyyy-MM-dd HH:mm:ss to Unix timestamp (in seconds),
@@ -2167,7 +2179,9 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def unix_timestamp(s: Column): Column = UnixTimestamp(s.expr, Literal("yyyy-MM-dd HH:mm:ss"))
+  def unix_timestamp(s: Column): Column = withExpr {
+    UnixTimestamp(s.expr, Literal("yyyy-MM-dd HH:mm:ss"))
+  }
 
   /**
    * Convert time string with given pattern
@@ -2176,7 +2190,7 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def unix_timestamp(s: Column, p: String): Column = UnixTimestamp(s.expr, Literal(p))
+  def unix_timestamp(s: Column, p: String): Column = withExpr {UnixTimestamp(s.expr, Literal(p)) }
 
   /**
    * Converts the column into DateType.
@@ -2184,7 +2198,7 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def to_date(e: Column): Column = ToDate(e.expr)
+  def to_date(e: Column): Column = withExpr { ToDate(e.expr) }
 
   /**
    * Returns date truncated to the unit specified by the format.
@@ -2195,22 +2209,27 @@ object functions {
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def trunc(date: Column, format: String): Column = TruncDate(date.expr, Literal(format))
+  def trunc(date: Column, format: String): Column = withExpr {
+    TruncDate(date.expr, Literal(format))
+  }
 
   /**
    * Assumes given timestamp is UTC and converts to given timezone.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def from_utc_timestamp(ts: Column, tz: String): Column =
-    FromUTCTimestamp(ts.expr, Literal(tz).expr)
+  def from_utc_timestamp(ts: Column, tz: String): Column = withExpr {
+    FromUTCTimestamp(ts.expr, Literal(tz))
+  }
 
   /**
    * Assumes given timestamp is in given timezone and converts to UTC.
    * @group datetime_funcs
    * @since 1.5.0
    */
-  def to_utc_timestamp(ts: Column, tz: String): Column = ToUTCTimestamp(ts.expr, Literal(tz).expr)
+  def to_utc_timestamp(ts: Column, tz: String): Column = withExpr {
+    ToUTCTimestamp(ts.expr, Literal(tz))
+  }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Collection functions
@@ -2221,8 +2240,9 @@ object functions {
    * @group collection_funcs
    * @since 1.5.0
    */
-  def array_contains(column: Column, value: Any): Column =
+  def array_contains(column: Column, value: Any): Column = withExpr {
     ArrayContains(column.expr, Literal(value))
+  }
 
   /**
    * Creates a new row for each element in the given array or map column.
@@ -2230,7 +2250,7 @@ object functions {
    * @group collection_funcs
    * @since 1.3.0
    */
-  def explode(e: Column): Column = Explode(e.expr)
+  def explode(e: Column): Column = withExpr { Explode(e.expr) }
 
   /**
    * Returns length of array or map.
@@ -2238,7 +2258,7 @@ object functions {
    * @group collection_funcs
    * @since 1.5.0
    */
-  def size(e: Column): Column = Size(e.expr)
+  def size(e: Column): Column = withExpr { Size(e.expr) }
 
   /**
    * Sorts the input array for the given column in ascending order,
@@ -2256,7 +2276,7 @@ object functions {
    * @group collection_funcs
    * @since 1.5.0
    */
-  def sort_array(e: Column, asc: Boolean): Column = SortArray(e.expr, lit(asc).expr)
+  def sort_array(e: Column, asc: Boolean): Column = withExpr { SortArray(e.expr, lit(asc).expr) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   //////////////////////////////////////////////////////////////////////////////////////////////
@@ -2296,11 +2316,10 @@ object functions {
      * @deprecated As of 1.5.0, since it's redundant with udf()
      */
     @deprecated("Use udf", "1.5.0")
-    def callUDF(f: Function$x[$fTypes], returnType: DataType${if (args.length > 0) ", " + args else ""}): Column = {
+    def callUDF(f: Function$x[$fTypes], returnType: DataType${if (args.length > 0) ", " + args else ""}): Column = withExpr {
       ScalaUDF(f, returnType, Seq($argsInUDF))
     }""")
   }
-  }
   */
   /**
    * Defines a user-defined function of 0 arguments as user-defined function (UDF).
@@ -2435,147 +2454,146 @@ object functions {
   }
 
   //////////////////////////////////////////////////////////////////////////////////////////////////
-
   /**
-   * Call a Scala function of 0 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 0 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function0[_], returnType: DataType): Column = {
+  def callUDF(f: Function0[_], returnType: DataType): Column = withExpr {
     ScalaUDF(f, returnType, Seq())
   }
 
   /**
-   * Call a Scala function of 1 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 1 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function1[_, _], returnType: DataType, arg1: Column): Column = {
+  def callUDF(f: Function1[_, _], returnType: DataType, arg1: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr))
   }
 
   /**
-   * Call a Scala function of 2 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 2 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function2[_, _, _], returnType: DataType, arg1: Column, arg2: Column): Column = {
+  def callUDF(f: Function2[_, _, _], returnType: DataType, arg1: Column, arg2: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr))
   }
 
   /**
-   * Call a Scala function of 3 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 3 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function3[_, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column): Column = {
+  def callUDF(f: Function3[_, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr))
   }
 
   /**
-   * Call a Scala function of 4 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 4 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function4[_, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column): Column = {
+  def callUDF(f: Function4[_, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr))
   }
 
   /**
-   * Call a Scala function of 5 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 5 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function5[_, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column): Column = {
+  def callUDF(f: Function5[_, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr))
   }
 
   /**
-   * Call a Scala function of 6 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 6 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function6[_, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column): Column = {
+  def callUDF(f: Function6[_, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr))
   }
 
   /**
-   * Call a Scala function of 7 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 7 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function7[_, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column): Column = {
+  def callUDF(f: Function7[_, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr))
   }
 
   /**
-   * Call a Scala function of 8 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 8 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function8[_, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column): Column = {
+  def callUDF(f: Function8[_, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr))
   }
 
   /**
-   * Call a Scala function of 9 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 9 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function9[_, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column): Column = {
+  def callUDF(f: Function9[_, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr, arg9.expr))
   }
 
   /**
-   * Call a Scala function of 10 arguments as user-defined function (UDF). This requires
-   * you to specify the return data type.
-   *
-   * @group udf_funcs
-   * @since 1.3.0
-   * @deprecated As of 1.5.0, since it's redundant with udf()
-   */
+    * Call a Scala function of 10 arguments as user-defined function (UDF). This requires
+    * you to specify the return data type.
+    *
+    * @group udf_funcs
+    * @since 1.3.0
+    * @deprecated As of 1.5.0, since it's redundant with udf()
+    */
   @deprecated("Use udf", "1.5.0")
-  def callUDF(f: Function10[_, _, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column, arg10: Column): Column = {
+  def callUDF(f: Function10[_, _, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column, arg10: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr, arg9.expr, arg10.expr))
   }
 
@@ -2597,7 +2615,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  def callUDF(udfName: String, cols: Column*): Column = {
+  def callUDF(udfName: String, cols: Column*): Column = withExpr {
     UnresolvedFunction(udfName, cols.map(_.expr), isDistinct = false)
   }
 
@@ -2618,7 +2636,7 @@ object functions {
    * @deprecated As of 1.5.0, since it was not coherent to have two functions callUdf and callUDF
    */
   @deprecated("Use callUDF", "1.5.0")
-  def callUdf(udfName: String, cols: Column*): Column = {
+  def callUdf(udfName: String, cols: Column*): Column = withExpr {
     // Note: we avoid using closures here because on file systems that are case-insensitive, the
     // compiled class file for the closure here will conflict with the one in callUDF (upper case).
     val exprs = new Array[Expression](cols.size)

From 244010624200eddea6dfd1b2c89f40be45212e96 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 5 Nov 2015 16:34:10 -0800
Subject: [PATCH 521/896] [SPARK-11542] [SPARKR] fix glm with long fomular

Because deparse() will break the long string into multiple lines, the deserialization will fail

Author: Davies Liu <davies@databricks.com>

Closes #9510 from davies/fix_glm.
---
 R/pkg/R/mllib.R               |  3 ++-
 R/pkg/inst/tests/test_mllib.R | 12 ++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index 60bfadb8e750..b0d73dd93a79 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -48,8 +48,9 @@ setMethod("glm", signature(formula = "formula", family = "ANY", data = "DataFram
           function(formula, family = c("gaussian", "binomial"), data, lambda = 0, alpha = 0,
             standardize = TRUE, solver = "auto") {
             family <- match.arg(family)
+            formula <- paste(deparse(formula), collapse="")
             model <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                 "fitRModelFormula", deparse(formula), data@sdf, family, lambda,
+                                 "fitRModelFormula", formula, data@sdf, family, lambda,
                                  alpha, standardize, solver)
             return(new("PipelineModel", model = model))
           })
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 032cfef061fd..4761e285a247 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -33,6 +33,18 @@ test_that("glm and predict", {
   expect_equal(typeof(take(select(prediction, "prediction"), 1)$prediction), "double")
 })
 
+test_that("glm should work with long formula", {
+  training <- createDataFrame(sqlContext, iris)
+  training$LongLongLongLongLongName <- training$Sepal_Width
+  training$VeryLongLongLongLonLongName <- training$Sepal_Length
+  training$AnotherLongLongLongLongName <- training$Species
+  model <- glm(LongLongLongLongLongName ~ VeryLongLongLongLonLongName + AnotherLongLongLongLongName,
+               data = training)
+  vals <- collect(select(predict(model, training), "prediction"))
+  rVals <- predict(glm(Sepal.Width ~ Sepal.Length + Species, data = iris), iris)
+  expect_true(all(abs(rVals - vals) < 1e-6), rVals - vals)
+})
+
 test_that("predictions match with native glm", {
   training <- createDataFrame(sqlContext, iris)
   model <- glm(Sepal_Width ~ Sepal_Length + Species, data = training)

From 07414afac9a100ede1dee5f3d45a657802c8bd2a Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 5 Nov 2015 17:02:22 -0800
Subject: [PATCH 522/896] [SPARK-11537] [SQL] fix negative
 hours/minutes/seconds

Currently, if the Timestamp is before epoch (1970/01/01), the hours, minutes and seconds will be negative (also rounding up).

Author: Davies Liu <davies@databricks.com>

Closes #9502 from davies/neg_hour.
---
 .../sql/catalyst/util/DateTimeUtils.scala     | 23 ++++++++++++-------
 .../catalyst/util/DateTimeUtilsSuite.scala    | 13 +++++++++++
 2 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index 781ed1688a32..f5fff90e5a54 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -392,29 +392,36 @@ object DateTimeUtils {
     Some((c.getTimeInMillis / MILLIS_PER_DAY).toInt)
   }
 
+  /**
+   * Returns the microseconds since year zero (-17999) from microseconds since epoch.
+   */
+  def absoluteMicroSecond(microsec: SQLTimestamp): SQLTimestamp = {
+    microsec + toYearZero * MICROS_PER_DAY
+  }
+
   /**
    * Returns the hour value of a given timestamp value. The timestamp is expressed in microseconds.
    */
-  def getHours(timestamp: SQLTimestamp): Int = {
-    val localTs = (timestamp / 1000) + defaultTimeZone.getOffset(timestamp / 1000)
-    ((localTs / 1000 / 3600) % 24).toInt
+  def getHours(microsec: SQLTimestamp): Int = {
+    val localTs = absoluteMicroSecond(microsec) + defaultTimeZone.getOffset(microsec / 1000) * 1000L
+    ((localTs / MICROS_PER_SECOND / 3600) % 24).toInt
   }
 
   /**
    * Returns the minute value of a given timestamp value. The timestamp is expressed in
    * microseconds.
    */
-  def getMinutes(timestamp: SQLTimestamp): Int = {
-    val localTs = (timestamp / 1000) + defaultTimeZone.getOffset(timestamp / 1000)
-    ((localTs / 1000 / 60) % 60).toInt
+  def getMinutes(microsec: SQLTimestamp): Int = {
+    val localTs = absoluteMicroSecond(microsec) + defaultTimeZone.getOffset(microsec / 1000) * 1000L
+    ((localTs / MICROS_PER_SECOND / 60) % 60).toInt
   }
 
   /**
    * Returns the second value of a given timestamp value. The timestamp is expressed in
    * microseconds.
    */
-  def getSeconds(timestamp: SQLTimestamp): Int = {
-    ((timestamp / 1000 / 1000) % 60).toInt
+  def getSeconds(microsec: SQLTimestamp): Int = {
+    ((absoluteMicroSecond(microsec) / MICROS_PER_SECOND) % 60).toInt
   }
 
   private[this] def isLeapYear(year: Int): Boolean = {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
index 46335941b62d..64d15e6b910c 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
@@ -358,6 +358,19 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     assert(getSeconds(c.getTimeInMillis * 1000) === 9)
   }
 
+  test("hours / miniute / seconds") {
+    Seq(Timestamp.valueOf("2015-06-11 10:12:35.789"),
+      Timestamp.valueOf("2015-06-11 20:13:40.789"),
+      Timestamp.valueOf("1900-06-11 12:14:50.789"),
+      Timestamp.valueOf("1700-02-28 12:14:50.123456")).foreach { t =>
+      val us = fromJavaTimestamp(t)
+      assert(toJavaTimestamp(us) === t)
+      assert(getHours(us) === t.getHours)
+      assert(getMinutes(us) === t.getMinutes)
+      assert(getSeconds(us) === t.getSeconds)
+    }
+  }
+
   test("get day in year") {
     val c = Calendar.getInstance()
     c.set(2015, 2, 18, 0, 0, 0)

From 6091e91fca58078a0f1d9c35d68c0ae7205a534c Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 17:10:35 -0800
Subject: [PATCH 523/896] Revert "[SPARK-11469][SQL] Allow users to define
 nondeterministic udfs."

This reverts commit 9cf56c96b7d02a14175d40b336da14c2e1c88339.
---
 project/MimaExcludes.scala                    |  47 -----
 .../sql/catalyst/expressions/ScalaUDF.scala   |   7 +-
 .../apache/spark/sql/UDFRegistration.scala    | 164 ++++++++----------
 .../spark/sql/UserDefinedFunction.scala       |  13 +-
 .../scala/org/apache/spark/sql/UDFSuite.scala | 105 -----------
 .../datasources/parquet/ParquetIOSuite.scala  |   4 +-
 6 files changed, 78 insertions(+), 262 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 90dc947d4e58..40f5c9fec8bb 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -114,53 +114,6 @@ object MimaExcludes {
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD"),
         ProblemFilters.exclude[MissingClassProblem](
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$")
-      ) ++ Seq(
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$2"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$3"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$4"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$5"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$6"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$7"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$8"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$9"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$10"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$11"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$12"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$13"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$14"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$15"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$16"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$17"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$18"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$19"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$20"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$21"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$22"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$23"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.sql.UDFRegistration.org$apache$spark$sql$UDFRegistration$$builder$24")
       ) ++ Seq(
         // SPARK-11485
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.DataFrameHolder.df")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
index a04af7f1dd87..11c7950c0613 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
@@ -30,18 +30,13 @@ case class ScalaUDF(
     function: AnyRef,
     dataType: DataType,
     children: Seq[Expression],
-    inputTypes: Seq[DataType] = Nil,
-    isDeterministic: Boolean = true)
+    inputTypes: Seq[DataType] = Nil)
   extends Expression with ImplicitCastInputTypes with CodegenFallback {
 
   override def nullable: Boolean = true
 
   override def toString: String = s"UDF(${children.mkString(",")})"
 
-  override def foldable: Boolean = deterministic && children.forall(_.foldable)
-
-  override def deterministic: Boolean = isDeterministic && children.forall(_.deterministic)
-
   // scalastyle:off
 
   /** This method has been generated by this script
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
index f5b95e13e47b..fc4d0938c533 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
@@ -58,10 +58,8 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
    * Register a user-defined aggregate function (UDAF).
    *
    * @param name the name of the UDAF.
-   * @param udaf the UDAF that needs to be registered.
+   * @param udaf the UDAF needs to be registered.
    * @return the registered UDAF.
-   *
-   * @since 1.5.0
    */
   def register(
       name: String,
@@ -71,22 +69,6 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     udaf
   }
 
-  /**
-   * Register a user-defined function (UDF).
-   *
-   * @param name the name of the UDF.
-   * @param udf the UDF that needs to be registered.
-   * @return the registered UDF.
-   *
-   * @since 1.6.0
-   */
-  def register(
-      name: String,
-      udf: UserDefinedFunction): UserDefinedFunction = {
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
-  }
-
   // scalastyle:off
 
   /* register 0-22 were generated by this script
@@ -104,9 +86,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
         def register[$typeTags](name: String, func: Function$x[$types]): UserDefinedFunction = {
           val dataType = ScalaReflection.schemaFor[RT].dataType
           val inputTypes = Try($inputTypes).getOrElse(Nil)
-          val udf = UserDefinedFunction(func, dataType, inputTypes)
-          functionRegistry.registerFunction(name, udf.builder)
-          udf
+          def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+          functionRegistry.registerFunction(name, builder)
+          UserDefinedFunction(func, dataType)
         }""")
     }
 
@@ -136,9 +118,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag](name: String, func: Function0[RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -149,9 +131,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag](name: String, func: Function1[A1, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -162,9 +144,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag](name: String, func: Function2[A1, A2, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -175,9 +157,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag](name: String, func: Function3[A1, A2, A3, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -188,9 +170,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag](name: String, func: Function4[A1, A2, A3, A4, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -201,9 +183,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag](name: String, func: Function5[A1, A2, A3, A4, A5, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -214,9 +196,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag](name: String, func: Function6[A1, A2, A3, A4, A5, A6, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -227,9 +209,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag](name: String, func: Function7[A1, A2, A3, A4, A5, A6, A7, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -240,9 +222,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag](name: String, func: Function8[A1, A2, A3, A4, A5, A6, A7, A8, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -253,9 +235,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag](name: String, func: Function9[A1, A2, A3, A4, A5, A6, A7, A8, A9, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -266,9 +248,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag](name: String, func: Function10[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -279,9 +261,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag](name: String, func: Function11[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -292,9 +274,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag](name: String, func: Function12[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -305,9 +287,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag](name: String, func: Function13[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -318,9 +300,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag](name: String, func: Function14[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -331,9 +313,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag](name: String, func: Function15[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -344,9 +326,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag](name: String, func: Function16[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -357,9 +339,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag](name: String, func: Function17[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -370,9 +352,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag](name: String, func: Function18[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -383,9 +365,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag](name: String, func: Function19[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -396,9 +378,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag](name: String, func: Function20[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -409,9 +391,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag](name: String, func: Function21[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   /**
@@ -422,9 +404,9 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
   def register[RT: TypeTag, A1: TypeTag, A2: TypeTag, A3: TypeTag, A4: TypeTag, A5: TypeTag, A6: TypeTag, A7: TypeTag, A8: TypeTag, A9: TypeTag, A10: TypeTag, A11: TypeTag, A12: TypeTag, A13: TypeTag, A14: TypeTag, A15: TypeTag, A16: TypeTag, A17: TypeTag, A18: TypeTag, A19: TypeTag, A20: TypeTag, A21: TypeTag, A22: TypeTag](name: String, func: Function22[A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, RT]): UserDefinedFunction = {
     val dataType = ScalaReflection.schemaFor[RT].dataType
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: ScalaReflection.schemaFor[A22].dataType :: Nil).getOrElse(Nil)
-    val udf = UserDefinedFunction(func, dataType, inputTypes)
-    functionRegistry.registerFunction(name, udf.builder)
-    udf
+    def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
+    functionRegistry.registerFunction(name, builder)
+    UserDefinedFunction(func, dataType)
   }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala b/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
index 1319391db537..0f8cd280b5ac 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/UserDefinedFunction.scala
@@ -44,20 +44,11 @@ import org.apache.spark.sql.types.DataType
 case class UserDefinedFunction protected[sql] (
     f: AnyRef,
     dataType: DataType,
-    inputTypes: Seq[DataType] = Nil,
-    deterministic: Boolean = true) {
+    inputTypes: Seq[DataType] = Nil) {
 
   def apply(exprs: Column*): Column = {
-    Column(ScalaUDF(f, dataType, exprs.map(_.expr), inputTypes, deterministic))
+    Column(ScalaUDF(f, dataType, exprs.map(_.expr), inputTypes))
   }
-
-  protected[sql] def builder: Seq[Expression] => ScalaUDF = {
-    (exprs: Seq[Expression]) =>
-      ScalaUDF(f, dataType, exprs, inputTypes, deterministic)
-  }
-
-  def nondeterministic: UserDefinedFunction =
-    UserDefinedFunction(f, dataType, inputTypes, deterministic = false)
 }
 
 /**
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
index 6e510f0b8aff..e0435a0dba6a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql
 
-import org.apache.spark.sql.catalyst.expressions.ScalaUDF
-import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.test.SQLTestData._
 
@@ -193,107 +191,4 @@ class UDFSuite extends QueryTest with SharedSQLContext {
     // pass a decimal to intExpected.
     assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 1)
   }
-
-  private def checkNumUDFs(df: DataFrame, expectedNumUDFs: Int): Unit = {
-    val udfs = df.queryExecution.optimizedPlan.collect {
-      case p: logical.Project => p.projectList.flatMap {
-        case e => e.collect {
-          case udf: ScalaUDF => udf
-        }
-      }
-    }.flatten
-    assert(udfs.length === expectedNumUDFs)
-  }
-
-  test("foldable udf") {
-    import org.apache.spark.sql.functions._
-
-    val myUDF = udf((x: Int) => x + 1)
-
-    {
-      val df = sql("SELECT 1 as a")
-        .select(col("a"), myUDF(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
-      checkNumUDFs(df, 0)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-  }
-
-  test("nondeterministic udf: using UDFRegistration") {
-    import org.apache.spark.sql.functions._
-
-    val myUDF = sqlContext.udf.register("plusOne1", (x: Int) => x + 1)
-    sqlContext.udf.register("plusOne2", myUDF.nondeterministic)
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), myUDF(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
-      checkNumUDFs(df, 3)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), callUDF("plusOne1", col("a")).as("b"))
-        .select(col("a"), col("b"), callUDF("plusOne1", col("b")).as("c"))
-      checkNumUDFs(df, 3)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
-      checkNumUDFs(df, 2)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), callUDF("plusOne2", col("a")).as("b"))
-        .select(col("a"), col("b"), callUDF("plusOne2", col("b")).as("c"))
-      checkNumUDFs(df, 2)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-  }
-
-  test("nondeterministic udf: using udf function") {
-    import org.apache.spark.sql.functions._
-
-    val myUDF = udf((x: Int) => x + 1)
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), myUDF(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF(col("b")).as("c"))
-      checkNumUDFs(df, 3)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-
-    {
-      val df = sqlContext.range(1, 2).select(col("id").as("a"))
-        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
-      checkNumUDFs(df, 2)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-
-    {
-      // nondeterministicUDF will not be foldable.
-      val df = sql("SELECT 1 as a")
-        .select(col("a"), myUDF.nondeterministic(col("a")).as("b"))
-        .select(col("a"), col("b"), myUDF.nondeterministic(col("b")).as("c"))
-      checkNumUDFs(df, 2)
-      checkAnswer(df, Row(1, 2, 3))
-    }
-  }
-
-  test("override a registered udf") {
-    sqlContext.udf.register("intExpected", (x: Int) => x)
-    assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 1)
-
-    sqlContext.udf.register("intExpected", (x: Int) => x + 1)
-    assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 2)
-  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index f14b2886a9ec..72744799897b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -381,7 +381,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       sqlContext.udf.register("div0", (x: Int) => x / 0)
       withTempPath { dir =>
         intercept[org.apache.spark.SparkException] {
-          sqlContext.range(1, 2).selectExpr("div0(id) as a").write.parquet(dir.getCanonicalPath)
+          sqlContext.sql("select div0(1)").write.parquet(dir.getCanonicalPath)
         }
         val path = new Path(dir.getCanonicalPath, "_temporary")
         val fs = path.getFileSystem(hadoopConfiguration)
@@ -405,7 +405,7 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       sqlContext.udf.register("div0", (x: Int) => x / 0)
       withTempPath { dir =>
         intercept[org.apache.spark.SparkException] {
-          sqlContext.range(1, 2).selectExpr("div0(id) as a").write.parquet(dir.getCanonicalPath)
+          sqlContext.sql("select div0(1)").write.parquet(dir.getCanonicalPath)
         }
         val path = new Path(dir.getCanonicalPath, "_temporary")
         val fs = path.getFileSystem(hadoopConfiguration)

From 8fa8c8375d7015a0332aa9ee613d7c6b6d62bae7 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Thu, 5 Nov 2015 17:59:01 -0800
Subject: [PATCH 524/896] [SPARK-11514][ML] Pass random seed to spark.ml
 DecisionTree*

cc jkbradley

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #9486 from yu-iskw/SPARK-11514.
---
 .../ml/classification/DecisionTreeClassifier.scala    |  4 +++-
 .../spark/ml/regression/DecisionTreeRegressor.scala   |  4 +++-
 .../scala/org/apache/spark/ml/tree/treeParams.scala   | 11 ++++++-----
 .../classification/DecisionTreeClassifierSuite.scala  |  1 +
 .../ml/regression/DecisionTreeRegressorSuite.scala    |  1 +
 5 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
index b0157f7ce24e..c478aea44ace 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/DecisionTreeClassifier.scala
@@ -62,6 +62,8 @@ final class DecisionTreeClassifier(override val uid: String)
 
   override def setImpurity(value: String): this.type = super.setImpurity(value)
 
+  override def setSeed(value: Long): this.type = super.setSeed(value)
+
   override protected def train(dataset: DataFrame): DecisionTreeClassificationModel = {
     val categoricalFeatures: Map[Int, Int] =
       MetadataUtils.getCategoricalFeatures(dataset.schema($(featuresCol)))
@@ -75,7 +77,7 @@ final class DecisionTreeClassifier(override val uid: String)
     val oldDataset: RDD[LabeledPoint] = extractLabeledPoints(dataset)
     val strategy = getOldStrategy(categoricalFeatures, numClasses)
     val trees = RandomForest.run(oldDataset, strategy, numTrees = 1, featureSubsetStrategy = "all",
-      seed = 0L, parentUID = Some(uid))
+      seed = $(seed), parentUID = Some(uid))
     trees.head.asInstanceOf[DecisionTreeClassificationModel]
   }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
index 04420fc6e825..477030d9ea3e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/DecisionTreeRegressor.scala
@@ -71,13 +71,15 @@ final class DecisionTreeRegressor @Since("1.4.0") (@Since("1.4.0") override val
   @Since("1.4.0")
   override def setImpurity(value: String): this.type = super.setImpurity(value)
 
+  override def setSeed(value: Long): this.type = super.setSeed(value)
+
   override protected def train(dataset: DataFrame): DecisionTreeRegressionModel = {
     val categoricalFeatures: Map[Int, Int] =
       MetadataUtils.getCategoricalFeatures(dataset.schema($(featuresCol)))
     val oldDataset: RDD[LabeledPoint] = extractLabeledPoints(dataset)
     val strategy = getOldStrategy(categoricalFeatures)
     val trees = RandomForest.run(oldDataset, strategy, numTrees = 1, featureSubsetStrategy = "all",
-      seed = 0L, parentUID = Some(uid))
+      seed = $(seed), parentUID = Some(uid))
     trees.head.asInstanceOf[DecisionTreeRegressionModel]
   }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
index 281ba6eeffa9..1da97db9277d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tree/treeParams.scala
@@ -29,7 +29,8 @@ import org.apache.spark.mllib.tree.loss.{Loss => OldLoss}
  *
  * Note: Marked as private and DeveloperApi since this may be made public in the future.
  */
-private[ml] trait DecisionTreeParams extends PredictorParams with HasCheckpointInterval {
+private[ml] trait DecisionTreeParams extends PredictorParams
+  with HasCheckpointInterval with HasSeed {
 
   /**
    * Maximum depth of the tree (>= 0).
@@ -123,6 +124,9 @@ private[ml] trait DecisionTreeParams extends PredictorParams with HasCheckpointI
   /** @group getParam */
   final def getMinInfoGain: Double = $(minInfoGain)
 
+  /** @group setParam */
+  def setSeed(value: Long): this.type = set(seed, value)
+
   /** @group expertSetParam */
   def setMaxMemoryInMB(value: Int): this.type = set(maxMemoryInMB, value)
 
@@ -257,7 +261,7 @@ private[ml] object TreeRegressorParams {
  *
  * Note: Marked as private and DeveloperApi since this may be made public in the future.
  */
-private[ml] trait TreeEnsembleParams extends DecisionTreeParams with HasSeed {
+private[ml] trait TreeEnsembleParams extends DecisionTreeParams {
 
   /**
    * Fraction of the training data used for learning each decision tree, in range (0, 1].
@@ -276,9 +280,6 @@ private[ml] trait TreeEnsembleParams extends DecisionTreeParams with HasSeed {
   /** @group getParam */
   final def getSubsamplingRate: Double = $(subsamplingRate)
 
-  /** @group setParam */
-  def setSeed(value: Long): this.type = set(seed, value)
-
   /**
    * Create a Strategy instance to use with the old API.
    * NOTE: The caller should set impurity and seed.
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
index 815f6fd99758..92b8f84144ab 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/DecisionTreeClassifierSuite.scala
@@ -72,6 +72,7 @@ class DecisionTreeClassifierSuite extends SparkFunSuite with MLlibTestSparkConte
       .setImpurity("gini")
       .setMaxDepth(2)
       .setMaxBins(100)
+      .setSeed(1)
     val categoricalFeatures = Map(0 -> 3, 1-> 3)
     val numClasses = 2
     compareAPIs(categoricalDataPointsRDD, dt, categoricalFeatures, numClasses)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
index 868fb8eecb8b..e0d5afa7a7e9 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
@@ -49,6 +49,7 @@ class DecisionTreeRegressorSuite extends SparkFunSuite with MLlibTestSparkContex
       .setImpurity("variance")
       .setMaxDepth(2)
       .setMaxBins(100)
+      .setSeed(1)
     val categoricalFeatures = Map(0 -> 3, 1-> 3)
     compareAPIs(categoricalDataPointsRDD, dt, categoricalFeatures)
   }

From 468ad0ae874d5cf55712ee976faf77f19c937ccb Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Thu, 5 Nov 2015 18:03:12 -0800
Subject: [PATCH 525/896] [SPARK-11457][STREAMING][YARN] Fix incorrect AM proxy
 filter conf recovery from checkpoint

Currently Yarn AM proxy filter configuration is recovered from checkpoint file when Spark Streaming application is restarted, which will lead to some unwanted behaviors:

1. Wrong RM address if RM is redeployed from failure.
2. Wrong proxyBase, since app id is updated, old app id for proxyBase is wrong.

So instead of recovering from checkpoint file, these configurations should be reloaded each time when app started.

This problem only exists in Yarn cluster mode, for Yarn client mode, these configurations will be updated with RPC message `AddWebUIFilter`.

Please help to review tdas harishreedharan vanzin , thanks a lot.

Author: jerryshao <sshao@hortonworks.com>

Closes #9412 from jerryshao/SPARK-11457.
---
 .../org/apache/spark/streaming/Checkpoint.scala     | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
index b7de6dde61c6..0cd55d9aec2c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
@@ -55,7 +55,8 @@ class Checkpoint(ssc: StreamingContext, val checkpointTime: Time)
       "spark.driver.port",
       "spark.master",
       "spark.yarn.keytab",
-      "spark.yarn.principal")
+      "spark.yarn.principal",
+      "spark.ui.filters")
 
     val newSparkConf = new SparkConf(loadDefaults = false).setAll(sparkConfPairs)
       .remove("spark.driver.host")
@@ -66,6 +67,16 @@ class Checkpoint(ssc: StreamingContext, val checkpointTime: Time)
         newSparkConf.set(prop, value)
       }
     }
+
+    // Add Yarn proxy filter specific configurations to the recovered SparkConf
+    val filter = "org.apache.hadoop.yarn.server.webproxy.amfilter.AmIpFilter"
+    val filterPrefix = s"spark.$filter.param."
+    newReloadConf.getAll.foreach { case (k, v) =>
+      if (k.startsWith(filterPrefix) && k.length > filterPrefix.length) {
+        newSparkConf.set(k, v)
+      }
+    }
+
     newSparkConf
   }
 

From 5e31db70bb783656ba042863fcd3c223e17a8f81 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 5 Nov 2015 18:05:58 -0800
Subject: [PATCH 526/896] [SPARK-11538][BUILD] Force guava 14 in sbt build.

sbt's version resolution code always picks the most recent version, and we
don't want that for guava.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9508 from vanzin/SPARK-11538.
---
 project/SparkBuild.scala | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 75c36930dece..b75ed13a78c6 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -207,7 +207,8 @@ object SparkBuild extends PomBuild {
   // Note ordering of these settings matter.
   /* Enable shared settings on all projects */
   (allProjects ++ optionallyEnabledProjects ++ assemblyProjects ++ Seq(spark, tools))
-    .foreach(enable(sharedSettings ++ ExcludedDependencies.settings ++ Revolver.settings))
+    .foreach(enable(sharedSettings ++ DependencyOverrides.settings ++
+      ExcludedDependencies.settings ++ Revolver.settings))
 
   /* Enable tests settings for all projects except examples, assembly and tools */
   (allProjects ++ optionallyEnabledProjects).foreach(enable(TestSettings.settings))
@@ -291,6 +292,14 @@ object Flume {
   lazy val settings = sbtavro.SbtAvro.avroSettings
 }
 
+/**
+ * Overrides to work around sbt's dependency resolution being different from Maven's.
+ */
+object DependencyOverrides {
+  lazy val settings = Seq(
+    dependencyOverrides += "com.google.guava" % "guava" % "14.0.1")
+}
+
 /**
   This excludes library dependencies in sbt, which are specified in maven but are
   not needed by sbt build.

From 3cc2c053b5d68c747a30bd58cf388b87b1922f13 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 18:12:54 -0800
Subject: [PATCH 527/896] [SPARK-11540][SQL] API audit for
 QueryExecutionListener.

Author: Reynold Xin <rxin@databricks.com>

Closes #9509 from rxin/SPARK-11540.
---
 .../spark/sql/execution/QueryExecution.scala  |  30 +++---
 .../sql/util/QueryExecutionListener.scala     | 101 ++++++++++--------
 2 files changed, 72 insertions(+), 59 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
index fc9174549e64..c2142d03f422 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.execution
 
+import com.google.common.annotations.VisibleForTesting
+
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.catalyst.InternalRow
@@ -25,31 +27,33 @@ import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 /**
  * The primary workflow for executing relational queries using Spark.  Designed to allow easy
  * access to the intermediate phases of query execution for developers.
+ *
+ * While this is not a public class, we should avoid changing the function names for the sake of
+ * changing them, because a lot of developers use the feature for debugging.
  */
 class QueryExecution(val sqlContext: SQLContext, val logical: LogicalPlan) {
-  val analyzer = sqlContext.analyzer
-  val optimizer = sqlContext.optimizer
-  val planner = sqlContext.planner
-  val cacheManager = sqlContext.cacheManager
-  val prepareForExecution = sqlContext.prepareForExecution
 
-  def assertAnalyzed(): Unit = analyzer.checkAnalysis(analyzed)
+  @VisibleForTesting
+  def assertAnalyzed(): Unit = sqlContext.analyzer.checkAnalysis(analyzed)
+
+  lazy val analyzed: LogicalPlan = sqlContext.analyzer.execute(logical)
 
-  lazy val analyzed: LogicalPlan = analyzer.execute(logical)
   lazy val withCachedData: LogicalPlan = {
     assertAnalyzed()
-    cacheManager.useCachedData(analyzed)
+    sqlContext.cacheManager.useCachedData(analyzed)
   }
-  lazy val optimizedPlan: LogicalPlan = optimizer.execute(withCachedData)
+
+  lazy val optimizedPlan: LogicalPlan = sqlContext.optimizer.execute(withCachedData)
 
   // TODO: Don't just pick the first one...
   lazy val sparkPlan: SparkPlan = {
     SparkPlan.currentContext.set(sqlContext)
-    planner.plan(optimizedPlan).next()
+    sqlContext.planner.plan(optimizedPlan).next()
   }
+
   // executedPlan should not be used to initialize any SparkPlan. It should be
   // only used for execution.
-  lazy val executedPlan: SparkPlan = prepareForExecution.execute(sparkPlan)
+  lazy val executedPlan: SparkPlan = sqlContext.prepareForExecution.execute(sparkPlan)
 
   /** Internal version of the RDD. Avoids copies and has no schema */
   lazy val toRdd: RDD[InternalRow] = executedPlan.execute()
@@ -57,11 +61,11 @@ class QueryExecution(val sqlContext: SQLContext, val logical: LogicalPlan) {
   protected def stringOrError[A](f: => A): String =
     try f.toString catch { case e: Throwable => e.toString }
 
-  def simpleString: String =
+  def simpleString: String = {
     s"""== Physical Plan ==
        |${stringOrError(executedPlan)}
       """.stripMargin.trim
-
+  }
 
   override def toString: String = {
     def output =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala b/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
index 909a8abd225b..ac432e2baa3c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/util/QueryExecutionListener.scala
@@ -19,36 +19,38 @@ package org.apache.spark.sql.util
 
 import java.util.concurrent.locks.ReentrantReadWriteLock
 import scala.collection.mutable.ListBuffer
+import scala.util.control.NonFatal
 
-import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.Logging
+import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.sql.execution.QueryExecution
 
 
 /**
+ * :: Experimental ::
  * The interface of query execution listener that can be used to analyze execution metrics.
  *
- * Note that implementations should guarantee thread-safety as they will be used in a non
- * thread-safe way.
+ * Note that implementations should guarantee thread-safety as they can be invoked by
+ * multiple different threads.
  */
 @Experimental
 trait QueryExecutionListener {
 
   /**
    * A callback function that will be called when a query executed successfully.
-   * Implementations should guarantee thread-safe.
+   * Note that this can be invoked by multiple different threads.
    *
-   * @param funcName the name of the action that triggered this query.
+   * @param funcName name of the action that triggered this query.
    * @param qe the QueryExecution object that carries detail information like logical plan,
    *           physical plan, etc.
-   * @param duration the execution time for this query in nanoseconds.
+   * @param durationNs the execution time for this query in nanoseconds.
    */
   @DeveloperApi
-  def onSuccess(funcName: String, qe: QueryExecution, duration: Long)
+  def onSuccess(funcName: String, qe: QueryExecution, durationNs: Long): Unit
 
   /**
    * A callback function that will be called when a query execution failed.
-   * Implementations should guarantee thread-safe.
+   * Note that this can be invoked by multiple different threads.
    *
    * @param funcName the name of the action that triggered this query.
    * @param qe the QueryExecution object that carries detail information like logical plan,
@@ -56,34 +58,20 @@ trait QueryExecutionListener {
    * @param exception the exception that failed this query.
    */
   @DeveloperApi
-  def onFailure(funcName: String, qe: QueryExecution, exception: Exception)
+  def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit
 }
 
-@Experimental
-class ExecutionListenerManager extends Logging {
-  private[this] val listeners = ListBuffer.empty[QueryExecutionListener]
-  private[this] val lock = new ReentrantReadWriteLock()
-
-  /** Acquires a read lock on the cache for the duration of `f`. */
-  private def readLock[A](f: => A): A = {
-    val rl = lock.readLock()
-    rl.lock()
-    try f finally {
-      rl.unlock()
-    }
-  }
 
-  /** Acquires a write lock on the cache for the duration of `f`. */
-  private def writeLock[A](f: => A): A = {
-    val wl = lock.writeLock()
-    wl.lock()
-    try f finally {
-      wl.unlock()
-    }
-  }
+/**
+ * :: Experimental ::
+ *
+ * Manager for [[QueryExecutionListener]]. See [[org.apache.spark.sql.SQLContext.listenerManager]].
+ */
+@Experimental
+class ExecutionListenerManager private[sql] () extends Logging {
 
   /**
-   * Registers the specified QueryExecutionListener.
+   * Registers the specified [[QueryExecutionListener]].
    */
   @DeveloperApi
   def register(listener: QueryExecutionListener): Unit = writeLock {
@@ -91,7 +79,7 @@ class ExecutionListenerManager extends Logging {
   }
 
   /**
-   * Unregisters the specified QueryExecutionListener.
+   * Unregisters the specified [[QueryExecutionListener]].
    */
   @DeveloperApi
   def unregister(listener: QueryExecutionListener): Unit = writeLock {
@@ -99,38 +87,59 @@ class ExecutionListenerManager extends Logging {
   }
 
   /**
-   * clears out all registered QueryExecutionListeners.
+   * Removes all the registered [[QueryExecutionListener]].
    */
   @DeveloperApi
   def clear(): Unit = writeLock {
     listeners.clear()
   }
 
-  private[sql] def onSuccess(
-      funcName: String,
-      qe: QueryExecution,
-      duration: Long): Unit = readLock {
-    withErrorHandling { listener =>
-      listener.onSuccess(funcName, qe, duration)
+  private[sql] def onSuccess(funcName: String, qe: QueryExecution, duration: Long): Unit = {
+    readLock {
+      withErrorHandling { listener =>
+        listener.onSuccess(funcName, qe, duration)
+      }
     }
   }
 
-  private[sql] def onFailure(
-      funcName: String,
-      qe: QueryExecution,
-      exception: Exception): Unit = readLock {
-    withErrorHandling { listener =>
-      listener.onFailure(funcName, qe, exception)
+  private[sql] def onFailure(funcName: String, qe: QueryExecution, exception: Exception): Unit = {
+    readLock {
+      withErrorHandling { listener =>
+        listener.onFailure(funcName, qe, exception)
+      }
     }
   }
 
+  private[this] val listeners = ListBuffer.empty[QueryExecutionListener]
+
+  /** A lock to prevent updating the list of listeners while we are traversing through them. */
+  private[this] val lock = new ReentrantReadWriteLock()
+
   private def withErrorHandling(f: QueryExecutionListener => Unit): Unit = {
     for (listener <- listeners) {
       try {
         f(listener)
       } catch {
-        case e: Exception => logWarning("error executing query execution listener", e)
+        case NonFatal(e) => logWarning("Error executing query execution listener", e)
       }
     }
   }
+
+  /** Acquires a read lock on the cache for the duration of `f`. */
+  private def readLock[A](f: => A): A = {
+    val rl = lock.readLock()
+    rl.lock()
+    try f finally {
+      rl.unlock()
+    }
+  }
+
+  /** Acquires a write lock on the cache for the duration of `f`. */
+  private def writeLock[A](f: => A): A = {
+    val wl = lock.writeLock()
+    wl.lock()
+    try f finally {
+      wl.unlock()
+    }
+  }
 }

From eec74ba8bde7f9446cc38e687bda103e85669d35 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 5 Nov 2015 19:02:18 -0800
Subject: [PATCH 528/896] [SPARK-7542][SQL] Support off-heap index/sort buffer

This brings the support of off-heap memory for array inside BytesToBytesMap and InMemorySorter, then we could allocate all the memory from off-heap for execution.

Closes #8068

Author: Davies Liu <davies@databricks.com>

Closes #9477 from davies/unsafe_timsort.
---
 .../apache/spark/memory/MemoryConsumer.java   | 36 +++++-----
 .../spark/memory/TaskMemoryManager.java       |  6 +-
 .../shuffle/sort/ShuffleExternalSorter.java   | 26 +++----
 .../shuffle/sort/ShuffleInMemorySorter.java   | 67 ++++++++++---------
 .../shuffle/sort/ShuffleSortDataFormat.java   | 38 +++++++----
 .../spark/unsafe/map/BytesToBytesMap.java     | 18 +++--
 .../unsafe/sort/UnsafeExternalSorter.java     | 28 +++-----
 .../unsafe/sort/UnsafeInMemorySorter.java     | 66 +++++++++++-------
 .../unsafe/sort/UnsafeSortDataFormat.java     | 47 +++++++------
 .../spark/memory/TaskMemoryManagerSuite.java  | 23 -------
 .../spark/memory/TestMemoryConsumer.java      | 45 +++++++++++++
 .../sort/ShuffleInMemorySorterSuite.java      | 16 +++--
 .../sort/UnsafeExternalSorterSuite.java       |  1 -
 .../sort/UnsafeInMemorySorterSuite.java       | 12 ++--
 .../sql/execution/UnsafeKVExternalSorter.java |  3 +-
 .../apache/spark/unsafe/array/LongArray.java  | 18 ++++-
 .../spark/unsafe/array/LongArraySuite.java    |  4 ++
 17 files changed, 265 insertions(+), 189 deletions(-)
 create mode 100644 core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java

diff --git a/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
index 008799cc7739..8fbdb72832ad 100644
--- a/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
+++ b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
@@ -20,6 +20,7 @@
 
 import java.io.IOException;
 
+import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 
 
@@ -28,9 +29,9 @@
  */
 public abstract class MemoryConsumer {
 
-  private final TaskMemoryManager taskMemoryManager;
+  protected final TaskMemoryManager taskMemoryManager;
   private final long pageSize;
-  private long used;
+  protected long used;
 
   protected MemoryConsumer(TaskMemoryManager taskMemoryManager, long pageSize) {
     this.taskMemoryManager = taskMemoryManager;
@@ -74,26 +75,29 @@ public void spill() throws IOException {
   public abstract long spill(long size, MemoryConsumer trigger) throws IOException;
 
   /**
-   * Acquire `size` bytes memory.
-   *
-   * If there is not enough memory, throws OutOfMemoryError.
+   * Allocates a LongArray of `size`.
    */
-  protected void acquireMemory(long size) {
-    long got = taskMemoryManager.acquireExecutionMemory(size, this);
-    if (got < size) {
-      taskMemoryManager.releaseExecutionMemory(got, this);
+  public LongArray allocateArray(long size) {
+    long required = size * 8L;
+    MemoryBlock page = taskMemoryManager.allocatePage(required, this);
+    if (page == null || page.size() < required) {
+      long got = 0;
+      if (page != null) {
+        got = page.size();
+        taskMemoryManager.freePage(page, this);
+      }
       taskMemoryManager.showMemoryUsage();
-      throw new OutOfMemoryError("Could not acquire " + size + " bytes of memory, got " + got);
+      throw new OutOfMemoryError("Unable to acquire " + required + " bytes of memory, got " + got);
     }
-    used += got;
+    used += required;
+    return new LongArray(page);
   }
 
   /**
-   * Release `size` bytes memory.
+   * Frees a LongArray.
    */
-  protected void releaseMemory(long size) {
-    used -= size;
-    taskMemoryManager.releaseExecutionMemory(size, this);
+  public void freeArray(LongArray array) {
+    freePage(array.memoryBlock());
   }
 
   /**
@@ -109,7 +113,7 @@ protected MemoryBlock allocatePage(long required) {
       long got = 0;
       if (page != null) {
         got = page.size();
-        freePage(page);
+        taskMemoryManager.freePage(page, this);
       }
       taskMemoryManager.showMemoryUsage();
       throw new OutOfMemoryError("Unable to acquire " + required + " bytes of memory, got " + got);
diff --git a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
index 4230575446d3..6440f9c0f30d 100644
--- a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
+++ b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
@@ -137,7 +137,7 @@ public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
       if (got < required) {
         // Call spill() on other consumers to release memory
         for (MemoryConsumer c: consumers) {
-          if (c != null && c != consumer && c.getUsed() > 0) {
+          if (c != consumer && c.getUsed() > 0) {
             try {
               long released = c.spill(required - got, consumer);
               if (released > 0) {
@@ -173,7 +173,9 @@ public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
         }
       }
 
-      consumers.add(consumer);
+      if (consumer != null) {
+        consumers.add(consumer);
+      }
       logger.debug("Task {} acquire {} for {}", taskAttemptId, Utils.bytesToString(got), consumer);
       return got;
     }
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
index 400d8520019b..9affff80143d 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleExternalSorter.java
@@ -39,6 +39,7 @@
 import org.apache.spark.storage.DiskBlockObjectWriter;
 import org.apache.spark.storage.TempShuffleBlockId;
 import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.util.Utils;
 
@@ -114,8 +115,7 @@ public ShuffleExternalSorter(
     this.numElementsForSpillThreshold =
       conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MAX_VALUE);
     this.writeMetrics = writeMetrics;
-    acquireMemory(initialSize * 8L);
-    this.inMemSorter = new ShuffleInMemorySorter(initialSize);
+    this.inMemSorter = new ShuffleInMemorySorter(this, initialSize);
     this.peakMemoryUsedBytes = getMemoryUsage();
   }
 
@@ -301,9 +301,8 @@ private long freeMemory() {
   public void cleanupResources() {
     freeMemory();
     if (inMemSorter != null) {
-      long sorterMemoryUsage = inMemSorter.getMemoryUsage();
+      inMemSorter.free();
       inMemSorter = null;
-      releaseMemory(sorterMemoryUsage);
     }
     for (SpillInfo spill : spills) {
       if (spill.file.exists() && !spill.file.delete()) {
@@ -321,9 +320,10 @@ private void growPointerArrayIfNecessary() throws IOException {
     assert(inMemSorter != null);
     if (!inMemSorter.hasSpaceForAnotherRecord()) {
       long used = inMemSorter.getMemoryUsage();
-      long needed = used + inMemSorter.getMemoryToExpand();
+      LongArray array;
       try {
-        acquireMemory(needed);  // could trigger spilling
+        // could trigger spilling
+        array = allocateArray(used / 8 * 2);
       } catch (OutOfMemoryError e) {
         // should have trigger spilling
         assert(inMemSorter.hasSpaceForAnotherRecord());
@@ -331,16 +331,9 @@ private void growPointerArrayIfNecessary() throws IOException {
       }
       // check if spilling is triggered or not
       if (inMemSorter.hasSpaceForAnotherRecord()) {
-        releaseMemory(needed);
+        freeArray(array);
       } else {
-        try {
-          inMemSorter.expandPointerArray();
-          releaseMemory(used);
-        } catch (OutOfMemoryError oom) {
-          // Just in case that JVM had run out of memory
-          releaseMemory(needed);
-          spill();
-        }
+        inMemSorter.expandPointerArray(array);
       }
     }
   }
@@ -404,9 +397,8 @@ public SpillInfo[] closeAndGetSpills() throws IOException {
         // Do not count the final file towards the spill count.
         writeSortedFile(true);
         freeMemory();
-        long sorterMemoryUsage = inMemSorter.getMemoryUsage();
+        inMemSorter.free();
         inMemSorter = null;
-        releaseMemory(sorterMemoryUsage);
       }
       return spills.toArray(new SpillInfo[spills.size()]);
     } catch (IOException e) {
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
index e630575d1ae1..58ad88e1ed87 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorter.java
@@ -19,11 +19,14 @@
 
 import java.util.Comparator;
 
+import org.apache.spark.memory.MemoryConsumer;
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.util.collection.Sorter;
 
 final class ShuffleInMemorySorter {
 
-  private final Sorter<PackedRecordPointer, long[]> sorter;
+  private final Sorter<PackedRecordPointer, LongArray> sorter;
   private static final class SortComparator implements Comparator<PackedRecordPointer> {
     @Override
     public int compare(PackedRecordPointer left, PackedRecordPointer right) {
@@ -32,24 +35,34 @@ public int compare(PackedRecordPointer left, PackedRecordPointer right) {
   }
   private static final SortComparator SORT_COMPARATOR = new SortComparator();
 
+  private final MemoryConsumer consumer;
+
   /**
    * An array of record pointers and partition ids that have been encoded by
    * {@link PackedRecordPointer}. The sort operates on this array instead of directly manipulating
    * records.
    */
-  private long[] array;
+  private LongArray array;
 
   /**
    * The position in the pointer array where new records can be inserted.
    */
   private int pos = 0;
 
-  public ShuffleInMemorySorter(int initialSize) {
+  public ShuffleInMemorySorter(MemoryConsumer consumer, int initialSize) {
+    this.consumer = consumer;
     assert (initialSize > 0);
-    this.array = new long[initialSize];
+    this.array = consumer.allocateArray(initialSize);
     this.sorter = new Sorter<>(ShuffleSortDataFormat.INSTANCE);
   }
 
+  public void free() {
+    if (array != null) {
+      consumer.freeArray(array);
+      array = null;
+    }
+  }
+
   public int numRecords() {
     return pos;
   }
@@ -58,30 +71,25 @@ public void reset() {
     pos = 0;
   }
 
-  private int newLength() {
-    // Guard against overflow:
-    return array.length <= Integer.MAX_VALUE / 2 ? (array.length * 2) : Integer.MAX_VALUE;
-  }
-
-  /**
-   * Returns the memory needed to expand
-   */
-  public long getMemoryToExpand() {
-    return ((long) (newLength() - array.length)) * 8;
-  }
-
-  public void expandPointerArray() {
-    final long[] oldArray = array;
-    array = new long[newLength()];
-    System.arraycopy(oldArray, 0, array, 0, oldArray.length);
+  public void expandPointerArray(LongArray newArray) {
+    assert(newArray.size() > array.size());
+    Platform.copyMemory(
+      array.getBaseObject(),
+      array.getBaseOffset(),
+      newArray.getBaseObject(),
+      newArray.getBaseOffset(),
+      array.size() * 8L
+    );
+    consumer.freeArray(array);
+    array = newArray;
   }
 
   public boolean hasSpaceForAnotherRecord() {
-    return pos < array.length;
+    return pos < array.size();
   }
 
   public long getMemoryUsage() {
-    return array.length * 8L;
+    return array.size() * 8L;
   }
 
   /**
@@ -96,14 +104,9 @@ public long getMemoryUsage() {
    */
   public void insertRecord(long recordPointer, int partitionId) {
     if (!hasSpaceForAnotherRecord()) {
-      if (array.length == Integer.MAX_VALUE) {
-        throw new IllegalStateException("Sort pointer array has reached maximum size");
-      } else {
-        expandPointerArray();
-      }
+      expandPointerArray(consumer.allocateArray(array.size() * 2));
     }
-    array[pos] =
-        PackedRecordPointer.packPointer(recordPointer, partitionId);
+    array.set(pos, PackedRecordPointer.packPointer(recordPointer, partitionId));
     pos++;
   }
 
@@ -112,12 +115,12 @@ public void insertRecord(long recordPointer, int partitionId) {
    */
   public static final class ShuffleSorterIterator {
 
-    private final long[] pointerArray;
+    private final LongArray pointerArray;
     private final int numRecords;
     final PackedRecordPointer packedRecordPointer = new PackedRecordPointer();
     private int position = 0;
 
-    public ShuffleSorterIterator(int numRecords, long[] pointerArray) {
+    public ShuffleSorterIterator(int numRecords, LongArray pointerArray) {
       this.numRecords = numRecords;
       this.pointerArray = pointerArray;
     }
@@ -127,7 +130,7 @@ public boolean hasNext() {
     }
 
     public void loadNext() {
-      packedRecordPointer.set(pointerArray[position]);
+      packedRecordPointer.set(pointerArray.get(position));
       position++;
     }
   }
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
index 8a1e5aec6ff0..8f4e3229976d 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/ShuffleSortDataFormat.java
@@ -17,16 +17,19 @@
 
 package org.apache.spark.shuffle.sort;
 
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
+import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.util.collection.SortDataFormat;
 
-final class ShuffleSortDataFormat extends SortDataFormat<PackedRecordPointer, long[]> {
+final class ShuffleSortDataFormat extends SortDataFormat<PackedRecordPointer, LongArray> {
 
   public static final ShuffleSortDataFormat INSTANCE = new ShuffleSortDataFormat();
 
   private ShuffleSortDataFormat() { }
 
   @Override
-  public PackedRecordPointer getKey(long[] data, int pos) {
+  public PackedRecordPointer getKey(LongArray data, int pos) {
     // Since we re-use keys, this method shouldn't be called.
     throw new UnsupportedOperationException();
   }
@@ -37,31 +40,38 @@ public PackedRecordPointer newKey() {
   }
 
   @Override
-  public PackedRecordPointer getKey(long[] data, int pos, PackedRecordPointer reuse) {
-    reuse.set(data[pos]);
+  public PackedRecordPointer getKey(LongArray data, int pos, PackedRecordPointer reuse) {
+    reuse.set(data.get(pos));
     return reuse;
   }
 
   @Override
-  public void swap(long[] data, int pos0, int pos1) {
-    final long temp = data[pos0];
-    data[pos0] = data[pos1];
-    data[pos1] = temp;
+  public void swap(LongArray data, int pos0, int pos1) {
+    final long temp = data.get(pos0);
+    data.set(pos0, data.get(pos1));
+    data.set(pos1, temp);
   }
 
   @Override
-  public void copyElement(long[] src, int srcPos, long[] dst, int dstPos) {
-    dst[dstPos] = src[srcPos];
+  public void copyElement(LongArray src, int srcPos, LongArray dst, int dstPos) {
+    dst.set(dstPos, src.get(srcPos));
   }
 
   @Override
-  public void copyRange(long[] src, int srcPos, long[] dst, int dstPos, int length) {
-    System.arraycopy(src, srcPos, dst, dstPos, length);
+  public void copyRange(LongArray src, int srcPos, LongArray dst, int dstPos, int length) {
+    Platform.copyMemory(
+      src.getBaseObject(),
+      src.getBaseOffset() + srcPos * 8,
+      dst.getBaseObject(),
+      dst.getBaseOffset() + dstPos * 8,
+      length * 8
+    );
   }
 
   @Override
-  public long[] allocate(int length) {
-    return new long[length];
+  public LongArray allocate(int length) {
+    // This buffer is used temporary (usually small), so it's fine to allocated from JVM heap.
+    return new LongArray(MemoryBlock.fromLongArray(new long[length]));
   }
 
 }
diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index 6656fd1d0bc5..04694dc54418 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -20,7 +20,6 @@
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
-import java.util.Arrays;
 import java.util.Iterator;
 import java.util.LinkedList;
 
@@ -724,11 +723,10 @@ public long spill(long size, MemoryConsumer trigger) throws IOException {
    */
   private void allocate(int capacity) {
     assert (capacity >= 0);
-    // The capacity needs to be divisible by 64 so that our bit set can be sized properly
     capacity = Math.max((int) Math.min(MAX_CAPACITY, ByteArrayMethods.nextPowerOf2(capacity)), 64);
     assert (capacity <= MAX_CAPACITY);
-    acquireMemory(capacity * 16);
-    longArray = new LongArray(MemoryBlock.fromLongArray(new long[capacity * 2]));
+    longArray = allocateArray(capacity * 2);
+    longArray.zeroOut();
 
     this.growthThreshold = (int) (capacity * loadFactor);
     this.mask = capacity - 1;
@@ -743,9 +741,8 @@ private void allocate(int capacity) {
   public void free() {
     updatePeakMemoryUsed();
     if (longArray != null) {
-      long used = longArray.memoryBlock().size();
+      freeArray(longArray);
       longArray = null;
-      releaseMemory(used);
     }
     Iterator<MemoryBlock> dataPagesIterator = dataPages.iterator();
     while (dataPagesIterator.hasNext()) {
@@ -834,9 +831,9 @@ public int getNumDataPages() {
   /**
    * Returns the underline long[] of longArray.
    */
-  public long[] getArray() {
+  public LongArray getArray() {
     assert(longArray != null);
-    return (long[]) longArray.memoryBlock().getBaseObject();
+    return longArray;
   }
 
   /**
@@ -844,7 +841,8 @@ public long[] getArray() {
    */
   public void reset() {
     numElements = 0;
-    Arrays.fill(getArray(), 0);
+    longArray.zeroOut();
+
     while (dataPages.size() > 0) {
       MemoryBlock dataPage = dataPages.removeLast();
       freePage(dataPage);
@@ -887,7 +885,7 @@ void growAndRehash() {
       longArray.set(newPos * 2, keyPointer);
       longArray.set(newPos * 2 + 1, hashcode);
     }
-    releaseMemory(oldLongArray.memoryBlock().size());
+    freeArray(oldLongArray);
 
     if (enablePerfMetrics) {
       timeSpentResizingNs += System.nanoTime() - resizeStartTime;
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index cba043bc48cc..9a7b2ad06cab 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -32,6 +32,7 @@
 import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.util.TaskCompletionListener;
 import org.apache.spark.util.Utils;
@@ -123,9 +124,8 @@ private UnsafeExternalSorter(
     this.writeMetrics = new ShuffleWriteMetrics();
 
     if (existingInMemorySorter == null) {
-      this.inMemSorter =
-        new UnsafeInMemorySorter(taskMemoryManager, recordComparator, prefixComparator, initialSize);
-      acquireMemory(inMemSorter.getMemoryUsage());
+      this.inMemSorter = new UnsafeInMemorySorter(
+        this, taskMemoryManager, recordComparator, prefixComparator, initialSize);
     } else {
       this.inMemSorter = existingInMemorySorter;
     }
@@ -277,9 +277,8 @@ public void cleanupResources() {
       deleteSpillFiles();
       freeMemory();
       if (inMemSorter != null) {
-        long used = inMemSorter.getMemoryUsage();
+        inMemSorter.free();
         inMemSorter = null;
-        releaseMemory(used);
       }
     }
   }
@@ -293,9 +292,10 @@ private void growPointerArrayIfNecessary() throws IOException {
     assert(inMemSorter != null);
     if (!inMemSorter.hasSpaceForAnotherRecord()) {
       long used = inMemSorter.getMemoryUsage();
-      long needed = used + inMemSorter.getMemoryToExpand();
+      LongArray array;
       try {
-        acquireMemory(needed);  // could trigger spilling
+        // could trigger spilling
+        array = allocateArray(used / 8 * 2);
       } catch (OutOfMemoryError e) {
         // should have trigger spilling
         assert(inMemSorter.hasSpaceForAnotherRecord());
@@ -303,16 +303,9 @@ private void growPointerArrayIfNecessary() throws IOException {
       }
       // check if spilling is triggered or not
       if (inMemSorter.hasSpaceForAnotherRecord()) {
-        releaseMemory(needed);
+        freeArray(array);
       } else {
-        try {
-          inMemSorter.expandPointerArray();
-          releaseMemory(used);
-        } catch (OutOfMemoryError oom) {
-          // Just in case that JVM had run out of memory
-          releaseMemory(needed);
-          spill();
-        }
+        inMemSorter.expandPointerArray(array);
       }
     }
   }
@@ -498,9 +491,8 @@ public void loadNext() throws IOException {
           nextUpstream = null;
 
           assert(inMemSorter != null);
-          long used = inMemSorter.getMemoryUsage();
+          inMemSorter.free();
           inMemSorter = null;
-          releaseMemory(used);
         }
         numRecords--;
         upstream.loadNext();
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
index d57213b9b8bf..a218ad4623f4 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
@@ -19,8 +19,10 @@
 
 import java.util.Comparator;
 
+import org.apache.spark.memory.MemoryConsumer;
 import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.util.collection.Sorter;
 
 /**
@@ -62,15 +64,16 @@ public int compare(RecordPointerAndKeyPrefix r1, RecordPointerAndKeyPrefix r2) {
     }
   }
 
+  private final MemoryConsumer consumer;
   private final TaskMemoryManager memoryManager;
-  private final Sorter<RecordPointerAndKeyPrefix, long[]> sorter;
+  private final Sorter<RecordPointerAndKeyPrefix, LongArray> sorter;
   private final Comparator<RecordPointerAndKeyPrefix> sortComparator;
 
   /**
    * Within this buffer, position {@code 2 * i} holds a pointer pointer to the record at
    * index {@code i}, while position {@code 2 * i + 1} in the array holds an 8-byte key prefix.
    */
-  private long[] array;
+  private LongArray array;
 
   /**
    * The position in the sort buffer where new records can be inserted.
@@ -78,22 +81,33 @@ public int compare(RecordPointerAndKeyPrefix r1, RecordPointerAndKeyPrefix r2) {
   private int pos = 0;
 
   public UnsafeInMemorySorter(
+    final MemoryConsumer consumer,
     final TaskMemoryManager memoryManager,
     final RecordComparator recordComparator,
     final PrefixComparator prefixComparator,
     int initialSize) {
-    this(memoryManager, recordComparator, prefixComparator, new long[initialSize * 2]);
+    this(consumer, memoryManager, recordComparator, prefixComparator,
+      consumer.allocateArray(initialSize * 2));
   }
 
   public UnsafeInMemorySorter(
+    final MemoryConsumer consumer,
       final TaskMemoryManager memoryManager,
       final RecordComparator recordComparator,
       final PrefixComparator prefixComparator,
-      long[] array) {
-    this.array = array;
+      LongArray array) {
+    this.consumer = consumer;
     this.memoryManager = memoryManager;
     this.sorter = new Sorter<>(UnsafeSortDataFormat.INSTANCE);
     this.sortComparator = new SortComparator(recordComparator, prefixComparator, memoryManager);
+    this.array = array;
+  }
+
+  /**
+   * Free the memory used by pointer array.
+   */
+  public void free() {
+    consumer.freeArray(array);
   }
 
   public void reset() {
@@ -107,26 +121,26 @@ public int numRecords() {
     return pos / 2;
   }
 
-  private int newLength() {
-    return array.length < Integer.MAX_VALUE / 2 ? (array.length * 2) : Integer.MAX_VALUE;
-  }
-
-  public long getMemoryToExpand() {
-    return (long) (newLength() - array.length) * 8L;
-  }
-
   public long getMemoryUsage() {
-    return array.length * 8L;
+    return array.size() * 8L;
   }
 
   public boolean hasSpaceForAnotherRecord() {
-    return pos + 2 <= array.length;
+    return pos + 2 <= array.size();
   }
 
-  public void expandPointerArray() {
-    final long[] oldArray = array;
-    array = new long[newLength()];
-    System.arraycopy(oldArray, 0, array, 0, oldArray.length);
+  public void expandPointerArray(LongArray newArray) {
+    if (newArray.size() < array.size()) {
+      throw new OutOfMemoryError("Not enough memory to grow pointer array");
+    }
+    Platform.copyMemory(
+      array.getBaseObject(),
+      array.getBaseOffset(),
+      newArray.getBaseObject(),
+      newArray.getBaseOffset(),
+      array.size() * 8L);
+    consumer.freeArray(array);
+    array = newArray;
   }
 
   /**
@@ -138,11 +152,11 @@ public void expandPointerArray() {
    */
   public void insertRecord(long recordPointer, long keyPrefix) {
     if (!hasSpaceForAnotherRecord()) {
-      expandPointerArray();
+      expandPointerArray(consumer.allocateArray(array.size() * 2));
     }
-    array[pos] = recordPointer;
+    array.set(pos, recordPointer);
     pos++;
-    array[pos] = keyPrefix;
+    array.set(pos, keyPrefix);
     pos++;
   }
 
@@ -150,7 +164,7 @@ public static final class SortedIterator extends UnsafeSorterIterator {
 
     private final TaskMemoryManager memoryManager;
     private final int sortBufferInsertPosition;
-    private final long[] sortBuffer;
+    private final LongArray sortBuffer;
     private int position = 0;
     private Object baseObject;
     private long baseOffset;
@@ -160,7 +174,7 @@ public static final class SortedIterator extends UnsafeSorterIterator {
     private SortedIterator(
         TaskMemoryManager memoryManager,
         int sortBufferInsertPosition,
-        long[] sortBuffer) {
+        LongArray sortBuffer) {
       this.memoryManager = memoryManager;
       this.sortBufferInsertPosition = sortBufferInsertPosition;
       this.sortBuffer = sortBuffer;
@@ -188,11 +202,11 @@ public int numRecordsLeft() {
     @Override
     public void loadNext() {
       // This pointer points to a 4-byte record length, followed by the record's bytes
-      final long recordPointer = sortBuffer[position];
+      final long recordPointer = sortBuffer.get(position);
       baseObject = memoryManager.getPage(recordPointer);
       baseOffset = memoryManager.getOffsetInPage(recordPointer) + 4;  // Skip over record length
       recordLength = Platform.getInt(baseObject, baseOffset - 4);
-      keyPrefix = sortBuffer[position + 1];
+      keyPrefix = sortBuffer.get(position + 1);
       position += 2;
     }
 
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSortDataFormat.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSortDataFormat.java
index d09c728a7a63..d3137f5f31c2 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSortDataFormat.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSortDataFormat.java
@@ -17,6 +17,9 @@
 
 package org.apache.spark.util.collection.unsafe.sort;
 
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.array.LongArray;
+import org.apache.spark.unsafe.memory.MemoryBlock;
 import org.apache.spark.util.collection.SortDataFormat;
 
 /**
@@ -26,14 +29,14 @@
  * Within each long[] buffer, position {@code 2 * i} holds a pointer pointer to the record at
  * index {@code i}, while position {@code 2 * i + 1} in the array holds an 8-byte key prefix.
  */
-final class UnsafeSortDataFormat extends SortDataFormat<RecordPointerAndKeyPrefix, long[]> {
+final class UnsafeSortDataFormat extends SortDataFormat<RecordPointerAndKeyPrefix, LongArray> {
 
   public static final UnsafeSortDataFormat INSTANCE = new UnsafeSortDataFormat();
 
   private UnsafeSortDataFormat() { }
 
   @Override
-  public RecordPointerAndKeyPrefix getKey(long[] data, int pos) {
+  public RecordPointerAndKeyPrefix getKey(LongArray data, int pos) {
     // Since we re-use keys, this method shouldn't be called.
     throw new UnsupportedOperationException();
   }
@@ -44,37 +47,43 @@ public RecordPointerAndKeyPrefix newKey() {
   }
 
   @Override
-  public RecordPointerAndKeyPrefix getKey(long[] data, int pos, RecordPointerAndKeyPrefix reuse) {
-    reuse.recordPointer = data[pos * 2];
-    reuse.keyPrefix = data[pos * 2 + 1];
+  public RecordPointerAndKeyPrefix getKey(LongArray data, int pos, RecordPointerAndKeyPrefix reuse) {
+    reuse.recordPointer = data.get(pos * 2);
+    reuse.keyPrefix = data.get(pos * 2 + 1);
     return reuse;
   }
 
   @Override
-  public void swap(long[] data, int pos0, int pos1) {
-    long tempPointer = data[pos0 * 2];
-    long tempKeyPrefix = data[pos0 * 2 + 1];
-    data[pos0 * 2] = data[pos1 * 2];
-    data[pos0 * 2 + 1] = data[pos1 * 2 + 1];
-    data[pos1 * 2] = tempPointer;
-    data[pos1 * 2 + 1] = tempKeyPrefix;
+  public void swap(LongArray data, int pos0, int pos1) {
+    long tempPointer = data.get(pos0 * 2);
+    long tempKeyPrefix = data.get(pos0 * 2 + 1);
+    data.set(pos0 * 2, data.get(pos1 * 2));
+    data.set(pos0 * 2 + 1, data.get(pos1 * 2 + 1));
+    data.set(pos1 * 2, tempPointer);
+    data.set(pos1 * 2 + 1, tempKeyPrefix);
   }
 
   @Override
-  public void copyElement(long[] src, int srcPos, long[] dst, int dstPos) {
-    dst[dstPos * 2] = src[srcPos * 2];
-    dst[dstPos * 2 + 1] = src[srcPos * 2 + 1];
+  public void copyElement(LongArray src, int srcPos, LongArray dst, int dstPos) {
+    dst.set(dstPos * 2, src.get(srcPos * 2));
+    dst.set(dstPos * 2 + 1, src.get(srcPos * 2 + 1));
   }
 
   @Override
-  public void copyRange(long[] src, int srcPos, long[] dst, int dstPos, int length) {
-    System.arraycopy(src, srcPos * 2, dst, dstPos * 2, length * 2);
+  public void copyRange(LongArray src, int srcPos, LongArray dst, int dstPos, int length) {
+    Platform.copyMemory(
+      src.getBaseObject(),
+      src.getBaseOffset() + srcPos * 16,
+      dst.getBaseObject(),
+      dst.getBaseOffset() + dstPos * 16,
+      length * 16);
   }
 
   @Override
-  public long[] allocate(int length) {
+  public LongArray allocate(int length) {
     assert (length < Integer.MAX_VALUE / 2) : "Length " + length + " is too large";
-    return new long[length * 2];
+    // This is used as temporary buffer, it's fine to allocate from JVM heap.
+    return new LongArray(MemoryBlock.fromLongArray(new long[length * 2]));
   }
 
 }
diff --git a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
index dab7b0592cb4..c73131739561 100644
--- a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
+++ b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
@@ -17,8 +17,6 @@
 
 package org.apache.spark.memory;
 
-import java.io.IOException;
-
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -27,27 +25,6 @@
 
 public class TaskMemoryManagerSuite {
 
-  class TestMemoryConsumer extends MemoryConsumer {
-    TestMemoryConsumer(TaskMemoryManager memoryManager) {
-      super(memoryManager);
-    }
-
-    @Override
-    public long spill(long size, MemoryConsumer trigger) throws IOException {
-      long used = getUsed();
-      releaseMemory(used);
-      return used;
-    }
-
-    void use(long size) {
-      acquireMemory(size);
-    }
-
-    void free(long size) {
-      releaseMemory(size);
-    }
-  }
-
   @Test
   public void leakedPageMemoryIsDetected() {
     final TaskMemoryManager manager = new TaskMemoryManager(
diff --git a/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java b/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java
new file mode 100644
index 000000000000..8ae364273850
--- /dev/null
+++ b/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory;
+
+import java.io.IOException;
+
+public class TestMemoryConsumer extends MemoryConsumer {
+  public TestMemoryConsumer(TaskMemoryManager memoryManager) {
+    super(memoryManager);
+  }
+
+  @Override
+  public long spill(long size, MemoryConsumer trigger) throws IOException {
+    long used = getUsed();
+    free(used);
+    return used;
+  }
+
+  void use(long size) {
+    long got = taskMemoryManager.acquireExecutionMemory(size, this);
+    used += got;
+  }
+
+  void free(long size) {
+    used -= size;
+    taskMemoryManager.releaseExecutionMemory(size, this);
+  }
+}
+
+
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
index 2293b1bbc113..faa5a863ee63 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/ShuffleInMemorySorterSuite.java
@@ -25,13 +25,19 @@
 
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.SparkConf;
-import org.apache.spark.unsafe.Platform;
+import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.memory.TestMemoryConsumer;
 import org.apache.spark.memory.TestMemoryManager;
+import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.memory.MemoryBlock;
-import org.apache.spark.memory.TaskMemoryManager;
 
 public class ShuffleInMemorySorterSuite {
 
+  final TestMemoryManager memoryManager =
+    new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false"));
+  final TaskMemoryManager taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
+  final TestMemoryConsumer consumer = new TestMemoryConsumer(taskMemoryManager);
+
   private static String getStringFromDataPage(Object baseObject, long baseOffset, int strLength) {
     final byte[] strBytes = new byte[strLength];
     Platform.copyMemory(baseObject, baseOffset, strBytes, Platform.BYTE_ARRAY_OFFSET, strLength);
@@ -40,7 +46,7 @@ private static String getStringFromDataPage(Object baseObject, long baseOffset,
 
   @Test
   public void testSortingEmptyInput() {
-    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(100);
+    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(consumer, 100);
     final ShuffleInMemorySorter.ShuffleSorterIterator iter = sorter.getSortedIterator();
     assert(!iter.hasNext());
   }
@@ -63,7 +69,7 @@ public void testBasicSorting() throws Exception {
       new TaskMemoryManager(new TestMemoryManager(conf), 0);
     final MemoryBlock dataPage = memoryManager.allocatePage(2048, null);
     final Object baseObject = dataPage.getBaseObject();
-    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
+    final ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(consumer, 4);
     final HashPartitioner hashPartitioner = new HashPartitioner(4);
 
     // Write the records into the data page and store pointers into the sorter
@@ -104,7 +110,7 @@ public void testBasicSorting() throws Exception {
 
   @Test
   public void testSortingManyNumbers() throws Exception {
-    ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(4);
+    ShuffleInMemorySorter sorter = new ShuffleInMemorySorter(consumer, 4);
     int[] numbersToSort = new int[128000];
     Random random = new Random(16);
     for (int i = 0; i < numbersToSort.length; i++) {
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
index cfead0e5924b..11c3a7be3887 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
@@ -390,7 +390,6 @@ public void testPeakMemoryUsed() throws Exception {
       for (int i = 0; i < numRecordsPerPage * 10; i++) {
         insertNumber(sorter, i);
         newPeakMemory = sorter.getPeakMemoryUsedBytes();
-        // The first page is pre-allocated on instantiation
         if (i % numRecordsPerPage == 0) {
           // We allocated a new page for this record, so peak memory should change
           assertEquals(previousPeakMemory + pageSizeBytes, newPeakMemory);
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
index 642f6585f8a1..a203a09648ac 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorterSuite.java
@@ -23,6 +23,7 @@
 
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.SparkConf;
+import org.apache.spark.memory.TestMemoryConsumer;
 import org.apache.spark.memory.TestMemoryManager;
 import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.unsafe.Platform;
@@ -44,9 +45,11 @@ private static String getStringFromDataPage(Object baseObject, long baseOffset,
 
   @Test
   public void testSortingEmptyInput() {
-    final UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(
-      new TaskMemoryManager(
-        new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0),
+    final TaskMemoryManager memoryManager = new TaskMemoryManager(
+      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+    final TestMemoryConsumer consumer = new TestMemoryConsumer(memoryManager);
+    final UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(consumer,
+      memoryManager,
       mock(RecordComparator.class),
       mock(PrefixComparator.class),
       100);
@@ -69,6 +72,7 @@ public void testSortingOnlyByIntegerPrefix() throws Exception {
     };
     final TaskMemoryManager memoryManager = new TaskMemoryManager(
       new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+    final TestMemoryConsumer consumer = new TestMemoryConsumer(memoryManager);
     final MemoryBlock dataPage = memoryManager.allocatePage(2048, null);
     final Object baseObject = dataPage.getBaseObject();
     // Write the records into the data page:
@@ -102,7 +106,7 @@ public int compare(long prefix1, long prefix2) {
         return (int) prefix1 - (int) prefix2;
       }
     };
-    UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(memoryManager, recordComparator,
+    UnsafeInMemorySorter sorter = new UnsafeInMemorySorter(consumer, memoryManager, recordComparator,
       prefixComparator, dataToSort.length);
     // Given a page of records, insert those records into the sorter one-by-one:
     position = dataPage.getBaseOffset();
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
index e2898ef2e215..8c9b9c85e37f 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeKVExternalSorter.java
@@ -85,8 +85,9 @@ public UnsafeKVExternalSorter(
     } else {
       // During spilling, the array in map will not be used, so we can borrow that and use it
       // as the underline array for in-memory sorter (it's always large enough).
+      // Since we will not grow the array, it's fine to pass `null` as consumer.
       final UnsafeInMemorySorter inMemSorter = new UnsafeInMemorySorter(
-        taskMemoryManager, recordComparator, prefixComparator, map.getArray());
+        null, taskMemoryManager, recordComparator, prefixComparator, map.getArray());
 
       // We cannot use the destructive iterator here because we are reusing the existing memory
       // pages in BytesToBytesMap to hold records during sorting.
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/array/LongArray.java b/unsafe/src/main/java/org/apache/spark/unsafe/array/LongArray.java
index 74105050e419..1a3cdff63826 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/array/LongArray.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/array/LongArray.java
@@ -39,7 +39,6 @@ public final class LongArray {
   private final long length;
 
   public LongArray(MemoryBlock memory) {
-    assert memory.size() % WIDTH == 0 : "Memory not aligned (" + memory.size() + ")";
     assert memory.size() < (long) Integer.MAX_VALUE * 8: "Array size > 4 billion elements";
     this.memory = memory;
     this.baseObj = memory.getBaseObject();
@@ -51,6 +50,14 @@ public MemoryBlock memoryBlock() {
     return memory;
   }
 
+  public Object getBaseObject() {
+    return baseObj;
+  }
+
+  public long getBaseOffset() {
+    return baseOffset;
+  }
+
   /**
    * Returns the number of elements this array can hold.
    */
@@ -58,6 +65,15 @@ public long size() {
     return length;
   }
 
+  /**
+   * Fill this all with 0L.
+   */
+  public void zeroOut() {
+    for (long off = baseOffset; off < baseOffset + length * WIDTH; off += WIDTH) {
+      Platform.putLong(baseObj, off, 0);
+    }
+  }
+
   /**
    * Sets the value at position {@code index}.
    */
diff --git a/unsafe/src/test/java/org/apache/spark/unsafe/array/LongArraySuite.java b/unsafe/src/test/java/org/apache/spark/unsafe/array/LongArraySuite.java
index 5974cf91ff99..fb8e53b3348f 100644
--- a/unsafe/src/test/java/org/apache/spark/unsafe/array/LongArraySuite.java
+++ b/unsafe/src/test/java/org/apache/spark/unsafe/array/LongArraySuite.java
@@ -34,5 +34,9 @@ public void basicTest() {
     Assert.assertEquals(2, arr.size());
     Assert.assertEquals(1L, arr.get(0));
     Assert.assertEquals(3L, arr.get(1));
+
+    arr.zeroOut();
+    Assert.assertEquals(0L, arr.get(0));
+    Assert.assertEquals(0L, arr.get(1));
   }
 }

From 363a476c3fefb0263e63fd24df0b2779a64f79ec Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 5 Nov 2015 21:42:32 -0800
Subject: [PATCH 529/896] [SPARK-11528] [SQL] Typed aggregations for Datasets

This PR adds the ability to do typed SQL aggregations.  We will likely also want to provide an interface to allow users to do aggregations on objects, but this is deferred to another PR.

```scala
val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
ds.groupBy(_._1).agg(sum("_2").as[Int]).collect()

res0: Array(("a", 30), ("b", 3), ("c", 1))
```

Author: Michael Armbrust <michael@databricks.com>

Closes #9499 from marmbrus/dataset-agg.
---
 .../expressions/namedExpressions.scala        |  4 +
 .../scala/org/apache/spark/sql/Dataset.scala  |  2 +-
 .../org/apache/spark/sql/GroupedDataset.scala | 93 ++++++++++++++++++-
 .../org/apache/spark/sql/DatasetSuite.scala   | 36 +++++++
 4 files changed, 132 insertions(+), 3 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 8957df0be681..9ab5c299d0f5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -254,6 +254,10 @@ case class AttributeReference(
   }
 
   override def toString: String = s"$name#${exprId.id}$typeSuffix"
+
+  // Since the expression id is not in the first constructor it is missing from the default
+  // tree string.
+  override def simpleString: String = s"$name#${exprId.id}: ${dataType.simpleString}"
 }
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 500227e93a47..4bca9c3b3fe5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -55,7 +55,7 @@ import org.apache.spark.sql.types.StructType
  * @since 1.6.0
  */
 @Experimental
-class Dataset[T] private(
+class Dataset[T] private[sql](
     @transient val sqlContext: SQLContext,
     @transient val queryExecution: QueryExecution,
     unresolvedEncoder: Encoder[T]) extends Serializable {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 96d6e9dd548e..b8fc373dffcf 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -17,16 +17,25 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Encoder}
-import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, Alias, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
 
 /**
+ * :: Experimental ::
  * A [[Dataset]] has been logically grouped by a user specified grouping key.  Users should not
  * construct a [[GroupedDataset]] directly, but should instead call `groupBy` on an existing
  * [[Dataset]].
+ *
+ * COMPATIBILITY NOTE: Long term we plan to make [[GroupedDataset)]] extend `GroupedData`.  However,
+ * making this change to the class hierarchy would break some function signatures. As such, this
+ * class should be considered a preview of the final API.  Changes will be made to the interface
+ * after Spark 1.6.
  */
+@Experimental
 class GroupedDataset[K, T] private[sql](
     private val kEncoder: Encoder[K],
     private val tEncoder: Encoder[T],
@@ -35,7 +44,7 @@ class GroupedDataset[K, T] private[sql](
     private val groupingAttributes: Seq[Attribute]) extends Serializable {
 
   private implicit val kEnc = kEncoder match {
-    case e: ExpressionEncoder[K] => e.resolve(groupingAttributes)
+    case e: ExpressionEncoder[K] => e.unbind(groupingAttributes).resolve(groupingAttributes)
     case other =>
       throw new UnsupportedOperationException("Only expression encoders are currently supported")
   }
@@ -46,9 +55,16 @@ class GroupedDataset[K, T] private[sql](
       throw new UnsupportedOperationException("Only expression encoders are currently supported")
   }
 
+  /** Encoders for built in aggregations. */
+  private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
+
   private def logicalPlan = queryExecution.analyzed
   private def sqlContext = queryExecution.sqlContext
 
+  private def groupedData =
+    new GroupedData(
+      new DataFrame(sqlContext, logicalPlan), groupingAttributes, GroupedData.GroupByType)
+
   /**
    * Returns a new [[GroupedDataset]] where the type of the key has been mapped to the specified
    * type. The mapping of key columns to the type follows the same rules as `as` on [[Dataset]].
@@ -88,6 +104,79 @@ class GroupedDataset[K, T] private[sql](
       MapGroups(f, groupingAttributes, logicalPlan))
   }
 
+  // To ensure valid overloading.
+  protected def agg(expr: Column, exprs: Column*): DataFrame =
+    groupedData.agg(expr, exprs: _*)
+
+  /**
+   * Internal helper function for building typed aggregations that return tuples.  For simplicity
+   * and code reuse, we do this without the help of the type system and then use helper functions
+   * that cast appropriately for the user facing interface.
+   * TODO: does not handle aggrecations that return nonflat results,
+   */
+  protected def aggUntyped(columns: TypedColumn[_]*): Dataset[_] = {
+    val aliases = (groupingAttributes ++ columns.map(_.expr)).map {
+      case u: UnresolvedAttribute => UnresolvedAlias(u)
+      case expr: NamedExpression => expr
+      case expr: Expression => Alias(expr, expr.prettyString)()
+    }
+
+    val unresolvedPlan = Aggregate(groupingAttributes, aliases, logicalPlan)
+    val execution = new QueryExecution(sqlContext, unresolvedPlan)
+
+    val columnEncoders = columns.map(_.encoder.asInstanceOf[ExpressionEncoder[_]])
+
+    // Rebind the encoders to the nested schema that will be produced by the aggregation.
+    val encoders = (kEnc +: columnEncoders).zip(execution.analyzed.output).map {
+      case (e: ExpressionEncoder[_], a) if !e.flat =>
+        e.nested(a).resolve(execution.analyzed.output)
+      case (e, a) =>
+        e.unbind(a :: Nil).resolve(execution.analyzed.output)
+    }
+    new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
+  }
+
+  /**
+   * Computes the given aggregation, returning a [[Dataset]] of tuples for each unique key
+   * and the result of computing this aggregation over all elements in the group.
+   */
+  def agg[A1](col1: TypedColumn[A1]): Dataset[(K, A1)] =
+    aggUntyped(col1).asInstanceOf[Dataset[(K, A1)]]
+
+  /**
+   * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
+   * and the result of computing these aggregations over all elements in the group.
+   */
+  def agg[A1, A2](col1: TypedColumn[A1], col2: TypedColumn[A2]): Dataset[(K, A1, A2)] =
+    aggUntyped(col1, col2).asInstanceOf[Dataset[(K, A1, A2)]]
+
+  /**
+   * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
+   * and the result of computing these aggregations over all elements in the group.
+   */
+  def agg[A1, A2, A3](
+      col1: TypedColumn[A1],
+      col2: TypedColumn[A2],
+      col3: TypedColumn[A3]): Dataset[(K, A1, A2, A3)] =
+    aggUntyped(col1, col2, col3).asInstanceOf[Dataset[(K, A1, A2, A3)]]
+
+  /**
+   * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
+   * and the result of computing these aggregations over all elements in the group.
+   */
+  def agg[A1, A2, A3, A4](
+      col1: TypedColumn[A1],
+      col2: TypedColumn[A2],
+      col3: TypedColumn[A3],
+      col4: TypedColumn[A4]): Dataset[(K, A1, A2, A3, A4)] =
+    aggUntyped(col1, col2, col3, col4).asInstanceOf[Dataset[(K, A1, A2, A3, A4)]]
+
+  /**
+   * Returns a [[Dataset]] that contains a tuple with each key and the number of items present
+   * for that key.
+   */
+  def count(): Dataset[(K, Long)] = agg(functions.count("*").as[Long])
+
   /**
    * Applies the given function to each cogrouped data.  For each unique group, the function will
    * be passed the grouping key and 2 iterators containing all elements in the group from
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 3e9b621cfd67..d61e17edc64e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -258,6 +258,42 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       (ClassData("a", 1), 30), (ClassData("b", 1), 3), (ClassData("c", 1), 1))
   }
 
+  test("typed aggregation: expr") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(sum("_2").as[Int]),
+      ("a", 30), ("b", 3), ("c", 1))
+  }
+
+  test("typed aggregation: expr, expr") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(sum("_2").as[Int], sum($"_2" + 1).as[Long]),
+      ("a", 30, 32L), ("b", 3, 5L), ("c", 1, 2L))
+  }
+
+  test("typed aggregation: expr, expr, expr") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(sum("_2").as[Int], sum($"_2" + 1).as[Long], count("*").as[Long]),
+      ("a", 30, 32L, 2L), ("b", 3, 5L, 2L), ("c", 1, 2L, 1L))
+  }
+
+  test("typed aggregation: expr, expr, expr, expr") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(
+        sum("_2").as[Int],
+        sum($"_2" + 1).as[Long],
+        count("*").as[Long],
+        avg("_2").as[Double]),
+      ("a", 30, 32L, 2L, 15.0), ("b", 3, 5L, 2L, 1.5), ("c", 1, 2L, 1L, 1.0))
+  }
+
   test("cogroup") {
     val ds1 = Seq(1 -> "a", 3 -> "abc", 5 -> "hello", 3 -> "foo").toDS()
     val ds2 = Seq(2 -> "q", 3 -> "w", 5 -> "e", 5 -> "r").toDS()

From bc5d6c03893a9bd340d6b94d3550e25648412241 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 5 Nov 2015 22:03:26 -0800
Subject: [PATCH 530/896] [SPARK-11541][SQL] Break JdbcDialects.scala into
 multiple files and mark various dialects as private.

Author: Reynold Xin <rxin@databricks.com>

Closes #9511 from rxin/SPARK-11541.
---
 project/MimaExcludes.scala                    |  19 +-
 .../org/apache/spark/sql/GroupedData.scala    |   2 +-
 .../spark/sql/jdbc/AggregatedDialect.scala    |  44 ++++
 .../apache/spark/sql/jdbc/DB2Dialect.scala    |  32 +++
 .../apache/spark/sql/jdbc/DerbyDialect.scala  |  44 ++++
 .../apache/spark/sql/jdbc/JdbcDialects.scala  | 190 +-----------------
 .../spark/sql/jdbc/MsSqlServerDialect.scala   |  41 ++++
 .../apache/spark/sql/jdbc/MySQLDialect.scala  |  48 +++++
 .../apache/spark/sql/jdbc/OracleDialect.scala |  45 +++++
 .../spark/sql/jdbc/PostgresDialect.scala      |  54 +++++
 10 files changed, 332 insertions(+), 187 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/AggregatedDialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/DB2Dialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/DerbyDialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 40f5c9fec8bb..dacef911e397 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -116,7 +116,24 @@ object MimaExcludes {
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$")
       ) ++ Seq(
         // SPARK-11485
-        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.DataFrameHolder.df")
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.DataFrameHolder.df"),
+        // SPARK-11541 mark various JDBC dialects as private
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.productElement"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.productArity"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.canEqual"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.productIterator"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.productPrefix"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.toString"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.NoopDialect.hashCode"),
+        ProblemFilters.exclude[MissingTypesProblem]("org.apache.spark.sql.jdbc.PostgresDialect$"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.productElement"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.productArity"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.canEqual"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.productIterator"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.productPrefix"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.toString"),
+        ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.hashCode"),
+        ProblemFilters.exclude[MissingTypesProblem]("org.apache.spark.sql.jdbc.NoopDialect$")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index 7cf66b65c872..f9eab5c2e965 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -40,7 +40,7 @@ import org.apache.spark.sql.types.NumericType
 class GroupedData protected[sql](
     df: DataFrame,
     groupingExprs: Seq[Expression],
-    private val groupType: GroupedData.GroupType) {
+    groupType: GroupedData.GroupType) {
 
   private[this] def toDF(aggExprs: Seq[Expression]): DataFrame = {
     val aggregates = if (df.sqlContext.conf.dataFrameRetainGroupColumns) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/AggregatedDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/AggregatedDialect.scala
new file mode 100644
index 000000000000..467d8d62d1b7
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/AggregatedDialect.scala
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import org.apache.spark.sql.types.{DataType, MetadataBuilder}
+
+/**
+ * AggregatedDialect can unify multiple dialects into one virtual Dialect.
+ * Dialects are tried in order, and the first dialect that does not return a
+ * neutral element will will.
+ *
+ * @param dialects List of dialects.
+ */
+private class AggregatedDialect(dialects: List[JdbcDialect]) extends JdbcDialect {
+
+  require(dialects.nonEmpty)
+
+  override def canHandle(url : String): Boolean =
+    dialects.map(_.canHandle(url)).reduce(_ && _)
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    dialects.flatMap(_.getCatalystType(sqlType, typeName, size, md)).headOption
+  }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = {
+    dialects.flatMap(_.getJDBCType(dt)).headOption
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DB2Dialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DB2Dialect.scala
new file mode 100644
index 000000000000..b1cb0e55026b
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DB2Dialect.scala
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import org.apache.spark.sql.types.{BooleanType, StringType, DataType}
+
+
+private object DB2Dialect extends JdbcDialect {
+
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:db2")
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case StringType => Option(JdbcType("CLOB", java.sql.Types.CLOB))
+    case BooleanType => Option(JdbcType("CHAR(1)", java.sql.Types.CHAR))
+    case _ => None
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DerbyDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DerbyDialect.scala
new file mode 100644
index 000000000000..84f68e779c38
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/DerbyDialect.scala
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.sql.Types
+
+import org.apache.spark.sql.types._
+
+
+private object DerbyDialect extends JdbcDialect {
+
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:derby")
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (sqlType == Types.REAL) Option(FloatType) else None
+  }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case StringType => Option(JdbcType("CLOB", java.sql.Types.CLOB))
+    case ByteType => Option(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
+    case ShortType => Option(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
+    case BooleanType => Option(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
+    // 31 is the maximum precision and 5 is the default scale for a Derby DECIMAL
+    case t: DecimalType if t.precision > 31 =>
+      Option(JdbcType("DECIMAL(31,5)", java.sql.Types.DECIMAL))
+    case _ => None
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index f9a6a09b6270..14bfea4e3e28 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.jdbc
 
-import java.sql.Types
-
 import org.apache.spark.sql.types._
 import org.apache.spark.annotation.DeveloperApi
 
@@ -115,11 +113,10 @@ abstract class JdbcDialect {
 @DeveloperApi
 object JdbcDialects {
 
-  private var dialects = List[JdbcDialect]()
-
   /**
    * Register a dialect for use on all new matching jdbc [[org.apache.spark.sql.DataFrame]].
    * Readding an existing dialect will cause a move-to-front.
+   *
    * @param dialect The new dialect.
    */
   def registerDialect(dialect: JdbcDialect) : Unit = {
@@ -128,12 +125,15 @@ object JdbcDialects {
 
   /**
    * Unregister a dialect. Does nothing if the dialect is not registered.
+   *
    * @param dialect The jdbc dialect.
    */
   def unregisterDialect(dialect : JdbcDialect) : Unit = {
     dialects = dialects.filterNot(_ == dialect)
   }
 
+  private[this] var dialects = List[JdbcDialect]()
+
   registerDialect(MySQLDialect)
   registerDialect(PostgresDialect)
   registerDialect(DB2Dialect)
@@ -141,7 +141,6 @@ object JdbcDialects {
   registerDialect(DerbyDialect)
   registerDialect(OracleDialect)
 
-
   /**
    * Fetch the JdbcDialect class corresponding to a given database url.
    */
@@ -156,187 +155,8 @@ object JdbcDialects {
 }
 
 /**
- * :: DeveloperApi ::
- * AggregatedDialect can unify multiple dialects into one virtual Dialect.
- * Dialects are tried in order, and the first dialect that does not return a
- * neutral element will will.
- * @param dialects List of dialects.
- */
-@DeveloperApi
-class AggregatedDialect(dialects: List[JdbcDialect]) extends JdbcDialect {
-
-  require(dialects.nonEmpty)
-
-  override def canHandle(url : String): Boolean =
-    dialects.map(_.canHandle(url)).reduce(_ && _)
-
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    dialects.flatMap(_.getCatalystType(sqlType, typeName, size, md)).headOption
-  }
-
-  override def getJDBCType(dt: DataType): Option[JdbcType] = {
-    dialects.flatMap(_.getJDBCType(dt)).headOption
-  }
-}
-
-/**
- * :: DeveloperApi ::
  * NOOP dialect object, always returning the neutral element.
  */
-@DeveloperApi
-case object NoopDialect extends JdbcDialect {
+private object NoopDialect extends JdbcDialect {
   override def canHandle(url : String): Boolean = true
 }
-
-/**
- * :: DeveloperApi ::
- * Default postgres dialect, mapping bit/cidr/inet on read and string/binary/boolean on write.
- */
-@DeveloperApi
-case object PostgresDialect extends JdbcDialect {
-  override def canHandle(url: String): Boolean = url.startsWith("jdbc:postgresql")
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    if (sqlType == Types.BIT && typeName.equals("bit") && size != 1) {
-      Option(BinaryType)
-    } else if (sqlType == Types.OTHER && typeName.equals("cidr")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("inet")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("json")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("jsonb")) {
-      Option(StringType)
-    } else None
-  }
-
-  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
-    case StringType => Some(JdbcType("TEXT", java.sql.Types.CHAR))
-    case BinaryType => Some(JdbcType("BYTEA", java.sql.Types.BINARY))
-    case BooleanType => Some(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
-    case _ => None
-  }
-
-  override def getTableExistsQuery(table: String): String = {
-    s"SELECT 1 FROM $table LIMIT 1"
-  }
-
-}
-
-/**
- * :: DeveloperApi ::
- * Default mysql dialect to read bit/bitsets correctly.
- */
-@DeveloperApi
-case object MySQLDialect extends JdbcDialect {
-  override def canHandle(url : String): Boolean = url.startsWith("jdbc:mysql")
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    if (sqlType == Types.VARBINARY && typeName.equals("BIT") && size != 1) {
-      // This could instead be a BinaryType if we'd rather return bit-vectors of up to 64 bits as
-      // byte arrays instead of longs.
-      md.putLong("binarylong", 1)
-      Option(LongType)
-    } else if (sqlType == Types.BIT && typeName.equals("TINYINT")) {
-      Option(BooleanType)
-    } else None
-  }
-
-  override def quoteIdentifier(colName: String): String = {
-    s"`$colName`"
-  }
-
-  override def getTableExistsQuery(table: String): String = {
-    s"SELECT 1 FROM $table LIMIT 1"
-  }
-}
-
-/**
- * :: DeveloperApi ::
- * Default DB2 dialect, mapping string/boolean on write to valid DB2 types.
- * By default string, and boolean gets mapped to db2 invalid types TEXT, and BIT(1).
- */
-@DeveloperApi
-case object DB2Dialect extends JdbcDialect {
-
-  override def canHandle(url: String): Boolean = url.startsWith("jdbc:db2")
-
-  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
-    case StringType => Some(JdbcType("CLOB", java.sql.Types.CLOB))
-    case BooleanType => Some(JdbcType("CHAR(1)", java.sql.Types.CHAR))
-    case _ => None
-  }
-}
-
-/**
- * :: DeveloperApi ::
- * Default Microsoft SQL Server dialect, mapping the datetimeoffset types to a String on read.
- */
-@DeveloperApi
-case object MsSqlServerDialect extends JdbcDialect {
-  override def canHandle(url: String): Boolean = url.startsWith("jdbc:sqlserver")
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    if (typeName.contains("datetimeoffset")) {
-      // String is recommend by Microsoft SQL Server for datetimeoffset types in non-MS clients
-      Option(StringType)
-    } else None
-  }
-
-  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
-    case TimestampType => Some(JdbcType("DATETIME", java.sql.Types.TIMESTAMP))
-    case _ => None
-  }
-}
-
-/**
- * :: DeveloperApi ::
- * Default Apache Derby dialect, mapping real on read
- * and string/byte/short/boolean/decimal on write.
- */
-@DeveloperApi
-case object DerbyDialect extends JdbcDialect {
-  override def canHandle(url: String): Boolean = url.startsWith("jdbc:derby")
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    if (sqlType == Types.REAL) Option(FloatType) else None
-  }
-
-  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
-    case StringType => Some(JdbcType("CLOB", java.sql.Types.CLOB))
-    case ByteType => Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
-    case ShortType => Some(JdbcType("SMALLINT", java.sql.Types.SMALLINT))
-    case BooleanType => Some(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
-    // 31 is the maximum precision and 5 is the default scale for a Derby DECIMAL
-    case (t: DecimalType) if (t.precision > 31) =>
-      Some(JdbcType("DECIMAL(31,5)", java.sql.Types.DECIMAL))
-    case _ => None
-  }
-
-}
-
-/**
- * :: DeveloperApi ::
- * Default Oracle dialect, mapping a nonspecific numeric type to a general decimal type.
- */
-@DeveloperApi
-case object OracleDialect extends JdbcDialect {
-  override def canHandle(url: String): Boolean = url.startsWith("jdbc:oracle")
-  override def getCatalystType(
-      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
-    // Handle NUMBER fields that have no precision/scale in special way
-    // because JDBC ResultSetMetaData converts this to 0 procision and -127 scale
-    // For more details, please see
-    // https://github.com/apache/spark/pull/8780#issuecomment-145598968
-    // and
-    // https://github.com/apache/spark/pull/8780#issuecomment-144541760
-    if (sqlType == Types.NUMERIC && size == 0) {
-      // This is sub-optimal as we have to pick a precision/scale in advance whereas the data
-      //  in Oracle is allowed to have different precision/scale for each value.
-      Some(DecimalType(DecimalType.MAX_PRECISION, 10))
-    } else {
-      None
-    }
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
new file mode 100644
index 000000000000..3eb722b070d5
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MsSqlServerDialect.scala
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import org.apache.spark.sql.types._
+
+
+private object MsSqlServerDialect extends JdbcDialect {
+
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:sqlserver")
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (typeName.contains("datetimeoffset")) {
+      // String is recommend by Microsoft SQL Server for datetimeoffset types in non-MS clients
+      Option(StringType)
+    } else {
+      None
+    }
+  }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case TimestampType => Some(JdbcType("DATETIME", java.sql.Types.TIMESTAMP))
+    case _ => None
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala
new file mode 100644
index 000000000000..da413ed1f08b
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/MySQLDialect.scala
@@ -0,0 +1,48 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.sql.Types
+
+import org.apache.spark.sql.types.{BooleanType, LongType, DataType, MetadataBuilder}
+
+
+private case object MySQLDialect extends JdbcDialect {
+
+  override def canHandle(url : String): Boolean = url.startsWith("jdbc:mysql")
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (sqlType == Types.VARBINARY && typeName.equals("BIT") && size != 1) {
+      // This could instead be a BinaryType if we'd rather return bit-vectors of up to 64 bits as
+      // byte arrays instead of longs.
+      md.putLong("binarylong", 1)
+      Option(LongType)
+    } else if (sqlType == Types.BIT && typeName.equals("TINYINT")) {
+      Option(BooleanType)
+    } else None
+  }
+
+  override def quoteIdentifier(colName: String): String = {
+    s"`$colName`"
+  }
+
+  override def getTableExistsQuery(table: String): String = {
+    s"SELECT 1 FROM $table LIMIT 1"
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala
new file mode 100644
index 000000000000..4165c382689f
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/OracleDialect.scala
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.sql.Types
+
+import org.apache.spark.sql.types._
+
+
+private case object OracleDialect extends JdbcDialect {
+
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:oracle")
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    // Handle NUMBER fields that have no precision/scale in special way
+    // because JDBC ResultSetMetaData converts this to 0 procision and -127 scale
+    // For more details, please see
+    // https://github.com/apache/spark/pull/8780#issuecomment-145598968
+    // and
+    // https://github.com/apache/spark/pull/8780#issuecomment-144541760
+    if (sqlType == Types.NUMERIC && size == 0) {
+      // This is sub-optimal as we have to pick a precision/scale in advance whereas the data
+      //  in Oracle is allowed to have different precision/scale for each value.
+      Option(DecimalType(DecimalType.MAX_PRECISION, 10))
+    } else {
+      None
+    }
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala
new file mode 100644
index 000000000000..e701a7fcd9e1
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.sql.Types
+
+import org.apache.spark.sql.types._
+
+
+private object PostgresDialect extends JdbcDialect {
+
+  override def canHandle(url: String): Boolean = url.startsWith("jdbc:postgresql")
+
+  override def getCatalystType(
+      sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
+    if (sqlType == Types.BIT && typeName.equals("bit") && size != 1) {
+      Option(BinaryType)
+    } else if (sqlType == Types.OTHER && typeName.equals("cidr")) {
+      Option(StringType)
+    } else if (sqlType == Types.OTHER && typeName.equals("inet")) {
+      Option(StringType)
+    } else if (sqlType == Types.OTHER && typeName.equals("json")) {
+      Option(StringType)
+    } else if (sqlType == Types.OTHER && typeName.equals("jsonb")) {
+      Option(StringType)
+    } else None
+  }
+
+  override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
+    case StringType => Some(JdbcType("TEXT", java.sql.Types.CHAR))
+    case BinaryType => Some(JdbcType("BYTEA", java.sql.Types.BINARY))
+    case BooleanType => Some(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
+    case _ => None
+  }
+
+  override def getTableExistsQuery(table: String): String = {
+    s"SELECT 1 FROM $table LIMIT 1"
+  }
+}

From 253e87e8ab8717ffef40a6d0d376b1add155ef90 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 6 Nov 2015 06:38:49 -0800
Subject: [PATCH 531/896] [SPARK-11453][SQL][FOLLOW-UP] remove DecimalLit

A cleanup for https://github.com/apache/spark/pull/9085.

The `DecimalLit` is very similar to `FloatLit`, we can just keep one of them.
Also added low level unit test at `SqlParserSuite`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9482 from cloud-fan/parser.
---
 .../sql/catalyst/AbstractSparkSQLParser.scala | 23 ++++++++-----------
 .../apache/spark/sql/catalyst/SqlParser.scala | 20 ++++------------
 .../spark/sql/catalyst/SqlParserSuite.scala   | 21 +++++++++++++++++
 3 files changed, 35 insertions(+), 29 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
index 04ac4f20c66e..bdc52c08acb6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/AbstractSparkSQLParser.scala
@@ -78,10 +78,6 @@ private[sql] abstract class AbstractSparkSQLParser
 }
 
 class SqlLexical extends StdLexical {
-  case class FloatLit(chars: String) extends Token {
-    override def toString: String = chars
-  }
-
   case class DecimalLit(chars: String) extends Token {
     override def toString: String = chars
   }
@@ -106,17 +102,16 @@ class SqlLexical extends StdLexical {
   }
 
   override lazy val token: Parser[Token] =
-    ( rep1(digit) ~ ('.' ~> digit.*).? ~ (exp ~> sign.? ~ rep1(digit)) ^^ {
-        case i ~ None ~ (sig ~ rest) =>
-          DecimalLit(i.mkString + "e" + sig.mkString + rest.mkString)
-        case i ~ Some(d) ~ (sig ~ rest) =>
-          DecimalLit(i.mkString + "." + d.mkString + "e" + sig.mkString + rest.mkString)
-      }
+    ( rep1(digit) ~ scientificNotation ^^ { case i ~ s => DecimalLit(i.mkString + s) }
+    | '.' ~> (rep1(digit) ~ scientificNotation) ^^
+      { case i ~ s => DecimalLit("0." + i.mkString + s) }
+    | rep1(digit) ~ ('.' ~> digit.*) ~ scientificNotation ^^
+      { case i1 ~ i2 ~ s => DecimalLit(i1.mkString + "." + i2.mkString + s) }
     | digit.* ~ identChar ~ (identChar | digit).* ^^
       { case first ~ middle ~ rest => processIdent((first ++ (middle :: rest)).mkString) }
     | rep1(digit) ~ ('.' ~> digit.*).? ^^ {
         case i ~ None => NumericLit(i.mkString)
-        case i ~ Some(d) => FloatLit(i.mkString + "." + d.mkString)
+        case i ~ Some(d) => DecimalLit(i.mkString + "." + d.mkString)
       }
     | '\'' ~> chrExcept('\'', '\n', EofCh).* <~ '\'' ^^
       { case chars => StringLit(chars mkString "") }
@@ -133,8 +128,10 @@ class SqlLexical extends StdLexical {
 
   override def identChar: Parser[Elem] = letter | elem('_')
 
-  private lazy val sign: Parser[Elem] = elem("s", c => c == '+' || c == '-')
-  private lazy val exp: Parser[Elem] = elem("e", c => c == 'E' || c == 'e')
+  private lazy val scientificNotation: Parser[String] =
+    (elem('e') | elem('E')) ~> (elem('+') | elem('-')).? ~ rep1(digit) ^^ {
+      case s ~ rest => "e" + s.mkString + rest.mkString
+    }
 
   override def whitespace: Parser[Any] =
     ( whitespaceChar
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index 440e9e28fa78..cd717c09f8e5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -334,27 +334,15 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
 
   protected lazy val numericLiteral: Parser[Literal] =
     ( integral  ^^ { case i => Literal(toNarrowestIntegerType(i)) }
-    | sign.? ~ unsignedFloat ^^ {
-      case s ~ f => Literal(toDecimalOrDouble(s.getOrElse("") + f))
-    }
-    | sign.? ~ unsignedDecimal ^^ {
-      case s ~ d => Literal(toDecimalOrDouble(s.getOrElse("") + d))
-    }
+    | sign.? ~ unsignedFloat ^^
+      { case s ~ f => Literal(toDecimalOrDouble(s.getOrElse("") + f)) }
     )
 
   protected lazy val unsignedFloat: Parser[String] =
     ( "." ~> numericLit ^^ { u => "0." + u }
-    | elem("decimal", _.isInstanceOf[lexical.FloatLit]) ^^ (_.chars)
+    | elem("decimal", _.isInstanceOf[lexical.DecimalLit]) ^^ (_.chars)
     )
 
-  protected lazy val unsignedDecimal: Parser[String] =
-    ( "." ~> decimalLit ^^ { u => "0." + u }
-    | elem("scientific_notation", _.isInstanceOf[lexical.DecimalLit]) ^^ (_.chars)
-    )
-
-  def decimalLit: Parser[String] =
-    elem("scientific_notation", _.isInstanceOf[lexical.DecimalLit]) ^^ (_.chars)
-
   protected lazy val sign: Parser[String] = ("+" | "-")
 
   protected lazy val integral: Parser[String] =
@@ -477,7 +465,7 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
 
   protected lazy val baseExpression: Parser[Expression] =
     ( "*" ^^^ UnresolvedStar(None)
-    | (ident <~ "."). + <~ "*" ^^ { case target => UnresolvedStar(Option(target))}
+    | rep1(ident <~ ".") <~ "*" ^^ { case target => UnresolvedStar(Option(target))}
     | primary
    )
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
index ea28bfa021be..9ff893b84775 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/SqlParserSuite.scala
@@ -126,4 +126,25 @@ class SqlParserSuite extends PlanTest {
     checkSingleUnit("13.123456789", "second")
     checkSingleUnit("-13.123456789", "second")
   }
+
+  test("support scientific notation") {
+    def assertRight(input: String, output: Double): Unit = {
+      val parsed = SqlParser.parse("SELECT " + input)
+      val expected = Project(
+        UnresolvedAlias(
+          Literal(output)
+        ) :: Nil,
+        OneRowRelation)
+      comparePlans(parsed, expected)
+    }
+
+    assertRight("9.0e1", 90)
+    assertRight(".9e+2", 90)
+    assertRight("0.9e+2", 90)
+    assertRight("900e-1", 90)
+    assertRight("900.0E-1", 90)
+    assertRight("9.e+1", 90)
+
+    intercept[RuntimeException](SqlParser.parse("SELECT .e3"))
+  }
 }

From cf69ce136590fea51843bc54f44f0f45c7d0ac36 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Fri, 6 Nov 2015 14:51:53 +0000
Subject: [PATCH 532/896] [SPARK-11511][STREAMING] Fix NPE when an InputDStream
 is not used

Just ignored `InputDStream`s that have null `rememberDuration` in `DStreamGraph.getMaxInputStreamRememberDuration`.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9476 from zsxwing/SPARK-11511.
---
 .../apache/spark/streaming/DStreamGraph.scala    |  3 ++-
 .../spark/streaming/StreamingContextSuite.scala  | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
index 1b0b7890b3b0..7829f5e88799 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/DStreamGraph.scala
@@ -167,7 +167,8 @@ final private[streaming] class DStreamGraph extends Serializable with Logging {
    * safe remember duration which can be used to perform cleanup operations.
    */
   def getMaxInputStreamRememberDuration(): Duration = {
-    inputStreams.map { _.rememberDuration }.maxBy { _.milliseconds }
+    // If an InputDStream is not used, its `rememberDuration` will be null and we can ignore them
+    inputStreams.map(_.rememberDuration).filter(_ != null).maxBy(_.milliseconds)
   }
 
   @throws(classOf[IOException])
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
index c7a877142b37..860fac29c0ee 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingContextSuite.scala
@@ -780,6 +780,22 @@ class StreamingContextSuite extends SparkFunSuite with BeforeAndAfter with Timeo
       "Please don't use queueStream when checkpointing is enabled."))
   }
 
+  test("Creating an InputDStream but not using it should not crash") {
+    ssc = new StreamingContext(master, appName, batchDuration)
+    val input1 = addInputStream(ssc)
+    val input2 = addInputStream(ssc)
+    val output = new TestOutputStream(input2)
+    output.register()
+    val batchCount = new BatchCounter(ssc)
+    ssc.start()
+    // Just wait for completing 2 batches to make sure it triggers
+    // `DStream.getMaxInputStreamRememberDuration`
+    batchCount.waitUntilBatchesCompleted(2, 10000)
+    // Throw the exception if crash
+    ssc.awaitTerminationOrTimeout(1)
+    ssc.stop()
+  }
+
   def addInputStream(s: StreamingContext): DStream[Int] = {
     val input = (1 to 100).map(i => 1 to i)
     val inputStream = new TestInputStream(s, input, 1)

From 574141a29835ce78d68c97bb54336cf4fd3c39d3 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Fri, 6 Nov 2015 10:52:04 -0800
Subject: [PATCH 533/896] [SPARK-9162] [SQL] Implement code generation for
 ScalaUDF

JIRA: https://issues.apache.org/jira/browse/SPARK-9162

Currently ScalaUDF extends CodegenFallback and doesn't provide code generation implementation. This path implements code generation for ScalaUDF.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9270 from viirya/scalaudf-codegen.
---
 .../sql/catalyst/expressions/ScalaUDF.scala   | 85 ++++++++++++++++++-
 .../scala/org/apache/spark/sql/UDFSuite.scala | 41 +++++++++
 2 files changed, 124 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
index 11c7950c0613..3388cc20a980 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.catalyst.expressions
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.codegen.CodegenFallback
+import org.apache.spark.sql.catalyst.expressions.codegen._
 import org.apache.spark.sql.types.DataType
 
 /**
@@ -31,7 +31,7 @@ case class ScalaUDF(
     dataType: DataType,
     children: Seq[Expression],
     inputTypes: Seq[DataType] = Nil)
-  extends Expression with ImplicitCastInputTypes with CodegenFallback {
+  extends Expression with ImplicitCastInputTypes {
 
   override def nullable: Boolean = true
 
@@ -60,6 +60,10 @@ case class ScalaUDF(
 
   */
 
+  // Accessors used in genCode
+  def userDefinedFunc(): AnyRef = function
+  def getChildren(): Seq[Expression] = children
+
   private[this] val f = children.size match {
     case 0 =>
       val func = function.asInstanceOf[() => Any]
@@ -960,6 +964,83 @@ case class ScalaUDF(
   }
 
   // scalastyle:on
+
+  // Generate codes used to convert the arguments to Scala type for user-defined funtions
+  private[this] def genCodeForConverter(ctx: CodeGenContext, index: Int): String = {
+    val converterClassName = classOf[Any => Any].getName
+    val typeConvertersClassName = CatalystTypeConverters.getClass.getName + ".MODULE$"
+    val expressionClassName = classOf[Expression].getName
+    val scalaUDFClassName = classOf[ScalaUDF].getName
+
+    val converterTerm = ctx.freshName("converter")
+    val expressionIdx = ctx.references.size - 1
+    ctx.addMutableState(converterClassName, converterTerm,
+      s"this.$converterTerm = ($converterClassName)$typeConvertersClassName" +
+        s".createToScalaConverter(((${expressionClassName})((($scalaUDFClassName)" +
+          s"expressions[$expressionIdx]).getChildren().apply($index))).dataType());")
+    converterTerm
+  }
+
+  override def genCode(
+      ctx: CodeGenContext,
+      ev: GeneratedExpressionCode): String = {
+
+    ctx.references += this
+
+    val scalaUDFClassName = classOf[ScalaUDF].getName
+    val converterClassName = classOf[Any => Any].getName
+    val typeConvertersClassName = CatalystTypeConverters.getClass.getName + ".MODULE$"
+    val expressionClassName = classOf[Expression].getName
+
+    // Generate codes used to convert the returned value of user-defined functions to Catalyst type
+    val catalystConverterTerm = ctx.freshName("catalystConverter")
+    val catalystConverterTermIdx = ctx.references.size - 1
+    ctx.addMutableState(converterClassName, catalystConverterTerm,
+      s"this.$catalystConverterTerm = ($converterClassName)$typeConvertersClassName" +
+        s".createToCatalystConverter((($scalaUDFClassName)expressions" +
+          s"[$catalystConverterTermIdx]).dataType());")
+
+    val resultTerm = ctx.freshName("result")
+
+    // This must be called before children expressions' codegen
+    // because ctx.references is used in genCodeForConverter
+    val converterTerms = (0 until children.size).map(genCodeForConverter(ctx, _))
+
+    // Initialize user-defined function
+    val funcClassName = s"scala.Function${children.size}"
+
+    val funcTerm = ctx.freshName("udf")
+    val funcExpressionIdx = ctx.references.size - 1
+    ctx.addMutableState(funcClassName, funcTerm,
+      s"this.$funcTerm = ($funcClassName)((($scalaUDFClassName)expressions" +
+        s"[$funcExpressionIdx]).userDefinedFunc());")
+
+    // codegen for children expressions
+    val evals = children.map(_.gen(ctx))
+
+    // Generate the codes for expressions and calling user-defined function
+    // We need to get the boxedType of dataType's javaType here. Because for the dataType
+    // such as IntegerType, its javaType is `int` and the returned type of user-defined
+    // function is Object. Trying to convert an Object to `int` will cause casting exception.
+    val evalCode = evals.map(_.code).mkString
+    val funcArguments = converterTerms.zip(evals).map {
+      case (converter, eval) => s"$converter.apply(${eval.value})"
+    }.mkString(",")
+    val callFunc = s"${ctx.boxedType(ctx.javaType(dataType))} $resultTerm = " +
+      s"(${ctx.boxedType(ctx.javaType(dataType))})${catalystConverterTerm}" +
+        s".apply($funcTerm.apply($funcArguments));"
+
+    evalCode + s"""
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      Boolean ${ev.isNull};
+
+      $callFunc
+
+      ${ev.value} = $resultTerm;
+      ${ev.isNull} = $resultTerm == null;
+    """
+  }
+
   private[this] val converter = CatalystTypeConverters.createToCatalystConverter(dataType)
   override def eval(input: InternalRow): Any = converter(f(input))
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
index e0435a0dba6a..9837fa6bdb35 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
@@ -191,4 +191,45 @@ class UDFSuite extends QueryTest with SharedSQLContext {
     // pass a decimal to intExpected.
     assert(sql("SELECT intExpected(1.0)").head().getInt(0) === 1)
   }
+
+  test("udf in different types") {
+    sqlContext.udf.register("testDataFunc", (n: Int, s: String) => { (n, s) })
+    sqlContext.udf.register("decimalDataFunc",
+      (a: java.math.BigDecimal, b: java.math.BigDecimal) => { (a, b) })
+    sqlContext.udf.register("binaryDataFunc", (a: Array[Byte], b: Int) => { (a, b) })
+    sqlContext.udf.register("arrayDataFunc",
+      (data: Seq[Int], nestedData: Seq[Seq[Int]]) => { (data, nestedData) })
+    sqlContext.udf.register("mapDataFunc",
+      (data: scala.collection.Map[Int, String]) => { data })
+    sqlContext.udf.register("complexDataFunc",
+      (m: Map[String, Int], a: Seq[Int], b: Boolean) => { (m, a, b) } )
+
+    checkAnswer(
+      sql("SELECT tmp.t.* FROM (SELECT testDataFunc(key, value) AS t from testData) tmp").toDF(),
+      testData)
+    checkAnswer(
+      sql("""
+           | SELECT tmp.t.* FROM
+           | (SELECT decimalDataFunc(a, b) AS t FROM decimalData) tmp
+          """.stripMargin).toDF(), decimalData)
+    checkAnswer(
+      sql("""
+           | SELECT tmp.t.* FROM
+           | (SELECT binaryDataFunc(a, b) AS t FROM binaryData) tmp
+          """.stripMargin).toDF(), binaryData)
+    checkAnswer(
+      sql("""
+           | SELECT tmp.t.* FROM
+           | (SELECT arrayDataFunc(data, nestedData) AS t FROM arrayData) tmp
+          """.stripMargin).toDF(), arrayData.toDF())
+    checkAnswer(
+      sql("""
+           | SELECT mapDataFunc(data) AS t FROM mapData
+          """.stripMargin).toDF(), mapData.toDF())
+    checkAnswer(
+      sql("""
+           | SELECT tmp.t.* FROM
+           | (SELECT complexDataFunc(m, a, b) AS t FROM complexData) tmp
+          """.stripMargin).toDF(), complexData.select("m", "a", "b"))
+  }
 }

From c048929c6a9f7ce57f384037cd6c0bf5751c447a Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Fri, 6 Nov 2015 11:11:36 -0800
Subject: [PATCH 534/896] [SPARK-10978][SQL][FOLLOW-UP] More comprehensive
 tests for PR #9399

This PR adds test cases that test various column pruning and filter push-down cases.

Author: Cheng Lian <lian@databricks.com>

Closes #9468 from liancheng/spark-10978.follow-up.
---
 .../spark/sql/sources/FilteredScanSuite.scala |  21 +-
 .../SimpleTextHadoopFsRelationSuite.scala     | 335 ++++++++++++++++--
 .../sql/sources/SimpleTextRelation.scala      |  11 +
 3 files changed, 321 insertions(+), 46 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
index 7541e723029b..2cad964e55b2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
@@ -17,16 +17,15 @@
 
 package org.apache.spark.sql.sources
 
-import org.apache.spark.sql.execution.datasources.LogicalRelation
-
 import scala.language.existentials
 
 import org.apache.spark.rdd.RDD
-import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.expressions.PredicateHelper
+import org.apache.spark.sql.execution.datasources.LogicalRelation
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
-
+import org.apache.spark.unsafe.types.UTF8String
 
 class FilteredScanSource extends RelationProvider {
   override def createRelation(
@@ -130,7 +129,7 @@ object ColumnsRequired {
   var set: Set[String] = Set.empty
 }
 
-class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
+class FilteredScanSuite extends DataSourceTest with SharedSQLContext with PredicateHelper {
   protected override lazy val sql = caseInsensitiveContext.sql _
 
   override def beforeAll(): Unit = {
@@ -144,9 +143,6 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
         |  to '10'
         |)
       """.stripMargin)
-
-    // UDF for testing filter push-down
-    caseInsensitiveContext.udf.register("udf_gt3", (_: Int) > 3)
   }
 
   sqlTest(
@@ -276,14 +272,15 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext {
   testPushDown("SELECT c FROM oneToTenFiltered WHERE c = 'aaaaaAAAAA'", 1, Set("c"))
   testPushDown("SELECT c FROM oneToTenFiltered WHERE c IN ('aaaaaAAAAA', 'foo')", 1, Set("c"))
 
-  // Columns only referenced by UDF filter must be required, as UDF filters can't be pushed down.
-  testPushDown("SELECT c FROM oneToTenFiltered WHERE udf_gt3(A)", 10, Set("a", "c"))
+  // Filters referencing multiple columns are not convertible, all referenced columns must be
+  // required.
+  testPushDown("SELECT c FROM oneToTenFiltered WHERE A + b > 9", 10, Set("a", "b", "c"))
 
-  // A query with an unconvertible filter, an unhandled filter, and a handled filter.
+  // A query with an inconvertible filter, an unhandled filter, and a handled filter.
   testPushDown(
     """SELECT a
       |  FROM oneToTenFiltered
-      | WHERE udf_gt3(b)
+      | WHERE a + b > 9
       |   AND b < 16
       |   AND c IN ('bbbbbBBBBB', 'cccccCCCCC', 'dddddDDDDD', 'foo')
     """.stripMargin.split("\n").map(_.trim).mkString(" "), 3, Set("a", "b"))
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
index d945408341fc..9251a69f31a4 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
@@ -17,15 +17,21 @@
 
 package org.apache.spark.sql.sources
 
+import java.io.File
+
 import org.apache.hadoop.fs.Path
+
+import org.apache.spark.sql.catalyst.expressions.Expression
 import org.apache.spark.deploy.SparkHadoopUtil
-import org.apache.spark.sql.Row
-import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.execution.PhysicalRDD
+import org.apache.spark.sql.catalyst.analysis.UnresolvedAttribute
+import org.apache.spark.sql.catalyst.expressions.{AttributeReference, PredicateHelper}
+import org.apache.spark.sql.execution.{LogicalRDD, PhysicalRDD}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types._
+import org.apache.spark.sql.{Column, DataFrame, Row, execution}
+import org.apache.spark.util.Utils
 
-class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest {
+class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with PredicateHelper {
   import testImplicits._
 
   override val dataSourceName: String = classOf[SimpleTextSource].getCanonicalName
@@ -70,43 +76,304 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest {
     }
   }
 
-  private val writer = testDF.write.option("dataSchema", dataSchema.json).format(dataSourceName)
-  private val reader = sqlContext.read.option("dataSchema", dataSchema.json).format(dataSourceName)
-
-  test("unhandledFilters") {
-    withTempPath { dir =>
-
-      val path = dir.getCanonicalPath
-      writer.save(s"$path/p=0")
-      writer.save(s"$path/p=1")
-
-      val isOdd = udf((_: Int) % 2 == 1)
-      val df = reader.load(path)
-        .filter(
-          // This filter is inconvertible
-          isOdd('a) &&
-            // This filter is convertible but unhandled
-            'a > 1 &&
-            // This filter is convertible and handled
-            'b > "val_1" &&
-            // This filter references a partiiton column, won't be pushed down
-            'p === 1
-        ).select('a, 'p)
-      val rawScan = df.queryExecution.executedPlan collect {
+  private var tempPath: File = _
+
+  private var partitionedDF: DataFrame = _
+
+  private val partitionedDataSchema: StructType = StructType('a.int :: 'b.int :: 'c.string :: Nil)
+
+  protected override def beforeAll(): Unit = {
+    this.tempPath = Utils.createTempDir()
+
+    val df = sqlContext.range(10).select(
+      'id cast IntegerType as 'a,
+      ('id cast IntegerType) * 2 as 'b,
+      concat(lit("val_"), 'id) as 'c
+    )
+
+    partitionedWriter(df).save(s"${tempPath.getCanonicalPath}/p=0")
+    partitionedWriter(df).save(s"${tempPath.getCanonicalPath}/p=1")
+
+    partitionedDF = partitionedReader.load(tempPath.getCanonicalPath)
+  }
+
+  override protected def afterAll(): Unit = {
+    Utils.deleteRecursively(tempPath)
+  }
+
+  private def partitionedWriter(df: DataFrame) =
+    df.write.option("dataSchema", partitionedDataSchema.json).format(dataSourceName)
+
+  private def partitionedReader =
+    sqlContext.read.option("dataSchema", partitionedDataSchema.json).format(dataSourceName)
+
+  /**
+   * Constructs test cases that test column pruning and filter push-down.
+   *
+   * For filter push-down, the following filters are not pushed-down.
+   *
+   * 1. Partitioning filters don't participate filter push-down, they are handled separately in
+   *    `DataSourceStrategy`
+   *
+   * 2. Catalyst filter `Expression`s that cannot be converted to data source `Filter`s are not
+   *    pushed down (e.g. UDF and filters referencing multiple columns).
+   *
+   * 3. Catalyst filter `Expression`s that can be converted to data source `Filter`s but cannot be
+   *    handled by the underlying data source are not pushed down (e.g. returned from
+   *    `BaseRelation.unhandledFilters()`).
+   *
+   *    Note that for [[SimpleTextRelation]], all data source [[Filter]]s other than [[GreaterThan]]
+   *    are unhandled.  We made this assumption in [[SimpleTextRelation.unhandledFilters()]] only
+   *    for testing purposes.
+   *
+   * @param projections Projection list of the query
+   * @param filter Filter condition of the query
+   * @param requiredColumns Expected names of required columns
+   * @param pushedFilters Expected data source [[Filter]]s that are pushed down
+   * @param inconvertibleFilters Expected Catalyst filter [[Expression]]s that cannot be converted
+   *        to data source [[Filter]]s
+   * @param unhandledFilters Expected Catalyst flter [[Expression]]s that can be converted to data
+   *        source [[Filter]]s but cannot be handled by the data source relation
+   * @param partitioningFilters Expected Catalyst filter [[Expression]]s that reference partition
+   *        columns
+   * @param expectedRawScanAnswer Expected query result of the raw table scan returned by the data
+   *        source relation
+   * @param expectedAnswer Expected query result of the full query
+   */
+  def testPruningAndFiltering(
+      projections: Seq[Column],
+      filter: Column,
+      requiredColumns: Seq[String],
+      pushedFilters: Seq[Filter],
+      inconvertibleFilters: Seq[Column],
+      unhandledFilters: Seq[Column],
+      partitioningFilters: Seq[Column])(
+      expectedRawScanAnswer: => Seq[Row])(
+      expectedAnswer: => Seq[Row]): Unit = {
+    test(s"pruning and filtering: df.select(${projections.mkString(", ")}).where($filter)") {
+      val df = partitionedDF.where(filter).select(projections: _*)
+      val queryExecution = df.queryExecution
+      val executedPlan = queryExecution.executedPlan
+
+      val rawScan = executedPlan.collect {
         case p: PhysicalRDD => p
       } match {
-        case Seq(p) => p
+        case Seq(scan) => scan
+        case _ => fail(s"More than one PhysicalRDD found\n$queryExecution")
       }
 
-      val outputSchema = new StructType().add("a", IntegerType).add("p", IntegerType)
+      markup("Checking raw scan answer")
+      checkAnswer(
+        DataFrame(sqlContext, LogicalRDD(rawScan.output, rawScan.rdd)(sqlContext)),
+        expectedRawScanAnswer)
 
-      assertResult(Set((2, 1), (3, 1))) {
-        rawScan.execute().collect()
-          .map { CatalystTypeConverters.convertToScala(_, outputSchema) }
-          .map { case Row(a, p) => (a, p) }.toSet
+      markup("Checking full query answer")
+      checkAnswer(df, expectedAnswer)
+
+      markup("Checking required columns")
+      assert(requiredColumns === SimpleTextRelation.requiredColumns)
+
+      val nonPushedFilters = {
+        val boundFilters = executedPlan.collect {
+          case f: execution.Filter => f
+        } match {
+          case Nil => Nil
+          case Seq(f) => splitConjunctivePredicates(f.condition)
+          case _ => fail(s"More than one PhysicalRDD found\n$queryExecution")
+        }
+
+        // Unbound these bound filters so that we can easily compare them with expected results.
+        boundFilters.map {
+          _.transform { case a: AttributeReference => UnresolvedAttribute(a.name) }
+        }.toSet
       }
 
-      checkAnswer(df, Row(3, 1))
+      markup("Checking pushed filters")
+      assert(SimpleTextRelation.pushedFilters === pushedFilters.toSet)
+
+      val expectedInconvertibleFilters = inconvertibleFilters.map(_.expr).toSet
+      val expectedUnhandledFilters = unhandledFilters.map(_.expr).toSet
+      val expectedPartitioningFilters = partitioningFilters.map(_.expr).toSet
+
+      markup("Checking unhandled and inconvertible filters")
+      assert(expectedInconvertibleFilters ++ expectedUnhandledFilters === nonPushedFilters)
+
+      markup("Checking partitioning filters")
+      val actualPartitioningFilters = splitConjunctivePredicates(filter.expr).filter {
+        _.references.contains(UnresolvedAttribute("p"))
+      }.toSet
+
+      // Partitioning filters are handled separately and don't participate filter push-down. So they
+      // shouldn't be part of non-pushed filters.
+      assert(expectedPartitioningFilters.intersect(nonPushedFilters).isEmpty)
+      assert(expectedPartitioningFilters === actualPartitioningFilters)
     }
   }
+
+  testPruningAndFiltering(
+    projections = Seq('*),
+    filter = 'p > 0,
+    requiredColumns = Seq("a", "b", "c"),
+    pushedFilters = Nil,
+    inconvertibleFilters = Nil,
+    unhandledFilters = Nil,
+    partitioningFilters = Seq('p > 0)
+  ) {
+    Seq(
+      Row(0, 0, "val_0", 1),
+      Row(1, 2, "val_1", 1),
+      Row(2, 4, "val_2", 1),
+      Row(3, 6, "val_3", 1),
+      Row(4, 8, "val_4", 1),
+      Row(5, 10, "val_5", 1),
+      Row(6, 12, "val_6", 1),
+      Row(7, 14, "val_7", 1),
+      Row(8, 16, "val_8", 1),
+      Row(9, 18, "val_9", 1))
+  } {
+    Seq(
+      Row(0, 0, "val_0", 1),
+      Row(1, 2, "val_1", 1),
+      Row(2, 4, "val_2", 1),
+      Row(3, 6, "val_3", 1),
+      Row(4, 8, "val_4", 1),
+      Row(5, 10, "val_5", 1),
+      Row(6, 12, "val_6", 1),
+      Row(7, 14, "val_7", 1),
+      Row(8, 16, "val_8", 1),
+      Row(9, 18, "val_9", 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('c, 'p),
+    filter = 'a < 3 && 'p > 0,
+    requiredColumns = Seq("c", "a"),
+    pushedFilters = Nil,
+    inconvertibleFilters = Nil,
+    unhandledFilters = Seq('a < 3),
+    partitioningFilters = Seq('p > 0)
+  ) {
+    Seq(
+      Row("val_0", 1, 0),
+      Row("val_1", 1, 1),
+      Row("val_2", 1, 2),
+      Row("val_3", 1, 3),
+      Row("val_4", 1, 4),
+      Row("val_5", 1, 5),
+      Row("val_6", 1, 6),
+      Row("val_7", 1, 7),
+      Row("val_8", 1, 8),
+      Row("val_9", 1, 9))
+  } {
+    Seq(
+      Row("val_0", 1),
+      Row("val_1", 1),
+      Row("val_2", 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('*),
+    filter = 'a > 8,
+    requiredColumns = Seq("a", "b", "c"),
+    pushedFilters = Seq(GreaterThan("a", 8)),
+    inconvertibleFilters = Nil,
+    unhandledFilters = Nil,
+    partitioningFilters = Nil
+  ) {
+    Seq(
+      Row(9, 18, "val_9", 0),
+      Row(9, 18, "val_9", 1))
+  } {
+    Seq(
+      Row(9, 18, "val_9", 0),
+      Row(9, 18, "val_9", 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('b, 'p),
+    filter = 'a > 8,
+    requiredColumns = Seq("b"),
+    pushedFilters = Seq(GreaterThan("a", 8)),
+    inconvertibleFilters = Nil,
+    unhandledFilters = Nil,
+    partitioningFilters = Nil
+  ) {
+    Seq(
+      Row(18, 0),
+      Row(18, 1))
+  } {
+    Seq(
+      Row(18, 0),
+      Row(18, 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('b, 'p),
+    filter = 'a > 8 && 'p > 0,
+    requiredColumns = Seq("b"),
+    pushedFilters = Seq(GreaterThan("a", 8)),
+    inconvertibleFilters = Nil,
+    unhandledFilters = Nil,
+    partitioningFilters = Seq('p > 0)
+  ) {
+    Seq(
+      Row(18, 1))
+  } {
+    Seq(
+      Row(18, 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('b, 'p),
+    filter = 'c > "val_7" && 'b < 18 && 'p > 0,
+    requiredColumns = Seq("b"),
+    pushedFilters = Seq(GreaterThan("c", "val_7")),
+    inconvertibleFilters = Nil,
+    unhandledFilters = Seq('b < 18),
+    partitioningFilters = Seq('p > 0)
+  ) {
+    Seq(
+      Row(16, 1),
+      Row(18, 1))
+  } {
+    Seq(
+      Row(16, 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('b, 'p),
+    filter = 'a % 2 === 0 && 'c > "val_7" && 'b < 18 && 'p > 0,
+    requiredColumns = Seq("b", "a"),
+    pushedFilters = Seq(GreaterThan("c", "val_7")),
+    inconvertibleFilters = Seq('a % 2 === 0),
+    unhandledFilters = Seq('b < 18),
+    partitioningFilters = Seq('p > 0)
+  ) {
+    Seq(
+      Row(16, 1, 8),
+      Row(18, 1, 9))
+  } {
+    Seq(
+      Row(16, 1))
+  }
+
+  testPruningAndFiltering(
+    projections = Seq('b, 'p),
+    filter = 'a > 7 && 'a < 9,
+    requiredColumns = Seq("b", "a"),
+    pushedFilters = Seq(GreaterThan("a", 7)),
+    inconvertibleFilters = Nil,
+    unhandledFilters = Seq('a < 9),
+    partitioningFilters = Nil
+  ) {
+    Seq(
+      Row(16, 0, 8),
+      Row(16, 1, 8),
+      Row(18, 0, 9),
+      Row(18, 1, 9))
+  } {
+    Seq(
+      Row(16, 0),
+      Row(16, 1))
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
index da09e1b00ae4..bdc48a383bbb 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
@@ -128,6 +128,9 @@ class SimpleTextRelation(
       filters: Array[Filter],
       inputFiles: Array[FileStatus]): RDD[Row] = {
 
+    SimpleTextRelation.requiredColumns = requiredColumns
+    SimpleTextRelation.pushedFilters = filters.toSet
+
     val fields = this.dataSchema.map(_.dataType)
     val inputAttributes = this.dataSchema.toAttributes
     val outputAttributes = requiredColumns.flatMap(name => inputAttributes.find(_.name == name))
@@ -191,6 +194,14 @@ class SimpleTextRelation(
   }
 }
 
+object SimpleTextRelation {
+  // Used to test column pruning
+  var requiredColumns: Seq[String] = Nil
+
+  // Used to test filter push-down
+  var pushedFilters: Set[Filter] = Set.empty
+}
+
 /**
  * A simple example [[HadoopFsRelationProvider]].
  */

From 8211aab0793cf64202b99be4f31bb8a9ae77050d Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 6 Nov 2015 11:13:51 -0800
Subject: [PATCH 535/896] [SPARK-9858][SQL] Add an ExchangeCoordinator to
 estimate the number of post-shuffle partitions for aggregates and joins
 (follow-up)

https://issues.apache.org/jira/browse/SPARK-9858

This PR is the follow-up work of https://github.com/apache/spark/pull/9276. It addresses JoshRosen's comments.

Author: Yin Huai <yhuai@databricks.com>

Closes #9453 from yhuai/numReducer-followUp.
---
 .../plans/physical/partitioning.scala         |   8 -
 .../apache/spark/sql/execution/Exchange.scala |  40 +++--
 .../sql/execution/ExchangeCoordinator.scala   |  31 ++--
 .../apache/spark/sql/CachedTableSuite.scala   | 150 ++++++++++++++----
 4 files changed, 167 insertions(+), 62 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
index 9312c8123e92..86b9417477ba 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
@@ -165,11 +165,6 @@ sealed trait Partitioning {
    * produced by `A` could have also been produced by `B`.
    */
   def guarantees(other: Partitioning): Boolean = this == other
-
-  def withNumPartitions(newNumPartitions: Int): Partitioning = {
-    throw new IllegalStateException(
-      s"It is not allowed to call withNumPartitions method of a ${this.getClass.getSimpleName}")
-  }
 }
 
 object Partitioning {
@@ -254,9 +249,6 @@ case class HashPartitioning(expressions: Seq[Expression], numPartitions: Int)
     case _ => false
   }
 
-  override def withNumPartitions(newNumPartitions: Int): HashPartitioning = {
-    HashPartitioning(expressions, newNumPartitions)
-  }
 }
 
 /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index 0f72ec6cc107..a4ce328c1a9e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -242,7 +242,7 @@ case class Exchange(
     // update the number of post-shuffle partitions.
     specifiedPartitionStartIndices.foreach { indices =>
       assert(newPartitioning.isInstanceOf[HashPartitioning])
-      newPartitioning = newPartitioning.withNumPartitions(indices.length)
+      newPartitioning = UnknownPartitioning(indices.length)
     }
     new ShuffledRowRDD(shuffleDependency, specifiedPartitionStartIndices)
   }
@@ -262,7 +262,7 @@ case class Exchange(
 
 object Exchange {
   def apply(newPartitioning: Partitioning, child: SparkPlan): Exchange = {
-    Exchange(newPartitioning, child, None: Option[ExchangeCoordinator])
+    Exchange(newPartitioning, child, coordinator = None: Option[ExchangeCoordinator])
   }
 }
 
@@ -315,7 +315,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
             child.outputPartitioning match {
               case hash: HashPartitioning => true
               case collection: PartitioningCollection =>
-                collection.partitionings.exists(_.isInstanceOf[HashPartitioning])
+                collection.partitionings.forall(_.isInstanceOf[HashPartitioning])
               case _ => false
             }
         }
@@ -416,28 +416,48 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       // First check if the existing partitions of the children all match. This means they are
       // partitioned by the same partitioning into the same number of partitions. In that case,
       // don't try to make them match `defaultPartitions`, just use the existing partitioning.
-      // TODO: this should be a cost based decision. For example, a big relation should probably
-      // maintain its existing number of partitions and smaller partitions should be shuffled.
-      // defaultPartitions is arbitrary.
-      val numPartitions = children.head.outputPartitioning.numPartitions
+      val maxChildrenNumPartitions = children.map(_.outputPartitioning.numPartitions).max
       val useExistingPartitioning = children.zip(requiredChildDistributions).forall {
         case (child, distribution) => {
           child.outputPartitioning.guarantees(
-            createPartitioning(distribution, numPartitions))
+            createPartitioning(distribution, maxChildrenNumPartitions))
         }
       }
 
       children = if (useExistingPartitioning) {
+        // We do not need to shuffle any child's output.
         children
       } else {
+        // We need to shuffle at least one child's output.
+        // Now, we will determine the number of partitions that will be used by created
+        // partitioning schemes.
+        val numPartitions = {
+          // Let's see if we need to shuffle all child's outputs when we use
+          // maxChildrenNumPartitions.
+          val shufflesAllChildren = children.zip(requiredChildDistributions).forall {
+            case (child, distribution) => {
+              !child.outputPartitioning.guarantees(
+                createPartitioning(distribution, maxChildrenNumPartitions))
+            }
+          }
+          // If we need to shuffle all children, we use defaultNumPreShufflePartitions as the
+          // number of partitions. Otherwise, we use maxChildrenNumPartitions.
+          if (shufflesAllChildren) defaultNumPreShufflePartitions else maxChildrenNumPartitions
+        }
+
         children.zip(requiredChildDistributions).map {
           case (child, distribution) => {
             val targetPartitioning =
-              createPartitioning(distribution, defaultNumPreShufflePartitions)
+              createPartitioning(distribution, numPartitions)
             if (child.outputPartitioning.guarantees(targetPartitioning)) {
               child
             } else {
-              Exchange(targetPartitioning, child)
+              child match {
+                // If child is an exchange, we replace it with
+                // a new one having targetPartitioning.
+                case Exchange(_, c, _) => Exchange(targetPartitioning, c)
+                case _ => Exchange(targetPartitioning, child)
+              }
             }
           }
         }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
index 8dbd69e1f44b..827fdd278460 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExchangeCoordinator.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.execution
 
 import java.util.{Map => JMap, HashMap => JHashMap}
+import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.mutable.ArrayBuffer
 
@@ -97,6 +98,7 @@ private[sql] class ExchangeCoordinator(
    * Registers an [[Exchange]] operator to this coordinator. This method is only allowed to be
    * called in the `doPrepare` method of an [[Exchange]] operator.
    */
+  @GuardedBy("this")
   def registerExchange(exchange: Exchange): Unit = synchronized {
     exchanges += exchange
   }
@@ -109,7 +111,7 @@ private[sql] class ExchangeCoordinator(
    */
   private[sql] def estimatePartitionStartIndices(
       mapOutputStatistics: Array[MapOutputStatistics]): Array[Int] = {
-    // If we have mapOutputStatistics.length <= numExchange, it is because we do not submit
+    // If we have mapOutputStatistics.length < numExchange, it is because we do not submit
     // a stage when the number of partitions of this dependency is 0.
     assert(mapOutputStatistics.length <= numExchanges)
 
@@ -121,6 +123,8 @@ private[sql] class ExchangeCoordinator(
         val totalPostShuffleInputSize = mapOutputStatistics.map(_.bytesByPartitionId.sum).sum
         // The max at here is to make sure that when we have an empty table, we
         // only have a single post-shuffle partition.
+        // There is no particular reason that we pick 16. We just need a number to
+        // prevent maxPostShuffleInputSize from being set to 0.
         val maxPostShuffleInputSize =
           math.max(math.ceil(totalPostShuffleInputSize / numPartitions.toDouble).toLong, 16)
         math.min(maxPostShuffleInputSize, advisoryTargetPostShuffleInputSize)
@@ -135,6 +139,12 @@ private[sql] class ExchangeCoordinator(
     // Make sure we do get the same number of pre-shuffle partitions for those stages.
     val distinctNumPreShufflePartitions =
       mapOutputStatistics.map(stats => stats.bytesByPartitionId.length).distinct
+    // The reason that we are expecting a single value of the number of pre-shuffle partitions
+    // is that when we add Exchanges, we set the number of pre-shuffle partitions
+    // (i.e. map output partitions) using a static setting, which is the value of
+    // spark.sql.shuffle.partitions. Even if two input RDDs are having different
+    // number of partitions, they will have the same number of pre-shuffle partitions
+    // (i.e. map output partitions).
     assert(
       distinctNumPreShufflePartitions.length == 1,
       "There should be only one distinct value of the number pre-shuffle partitions " +
@@ -177,6 +187,7 @@ private[sql] class ExchangeCoordinator(
     partitionStartIndices.toArray
   }
 
+  @GuardedBy("this")
   private def doEstimationIfNecessary(): Unit = synchronized {
     // It is unlikely that this method will be called from multiple threads
     // (when multiple threads trigger the execution of THIS physical)
@@ -209,11 +220,11 @@ private[sql] class ExchangeCoordinator(
 
       // Wait for the finishes of those submitted map stages.
       val mapOutputStatistics = new Array[MapOutputStatistics](submittedStageFutures.length)
-      i = 0
-      while (i < submittedStageFutures.length) {
+      var j = 0
+      while (j < submittedStageFutures.length) {
         // This call is a blocking call. If the stage has not finished, we will wait at here.
-        mapOutputStatistics(i) = submittedStageFutures(i).get()
-        i += 1
+        mapOutputStatistics(j) = submittedStageFutures(j).get()
+        j += 1
       }
 
       // Now, we estimate partitionStartIndices. partitionStartIndices.length will be the
@@ -225,14 +236,14 @@ private[sql] class ExchangeCoordinator(
           Some(estimatePartitionStartIndices(mapOutputStatistics))
         }
 
-      i = 0
-      while (i < numExchanges) {
-        val exchange = exchanges(i)
+      var k = 0
+      while (k < numExchanges) {
+        val exchange = exchanges(k)
         val rdd =
-          exchange.preparePostShuffleRDD(shuffleDependencies(i), partitionStartIndices)
+          exchange.preparePostShuffleRDD(shuffleDependencies(k), partitionStartIndices)
         newPostShuffleRDDs.put(exchange, rdd)
 
-        i += 1
+        k += 1
       }
 
       // Finally, we set postShuffleRDDs and estimated.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
index dbcb011f603f..bce94dafad75 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
@@ -29,12 +29,12 @@ import org.scalatest.concurrent.Eventually._
 import org.apache.spark.Accumulators
 import org.apache.spark.sql.columnar._
 import org.apache.spark.sql.functions._
-import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.sql.test.{SQLTestUtils, SharedSQLContext}
 import org.apache.spark.storage.{StorageLevel, RDDBlockId}
 
 private case class BigData(s: String)
 
-class CachedTableSuite extends QueryTest with SharedSQLContext {
+class CachedTableSuite extends QueryTest with SQLTestUtils with SharedSQLContext {
   import testImplicits._
 
   def rddIdOf(tableName: String): Int = {
@@ -375,53 +375,135 @@ class CachedTableSuite extends QueryTest with SharedSQLContext {
       sql("SELECT key, count(*) FROM orderedTable GROUP BY key ORDER BY key"),
       sql("SELECT key, count(*) FROM testData3x GROUP BY key ORDER BY key").collect())
     sqlContext.uncacheTable("orderedTable")
+    sqlContext.dropTempTable("orderedTable")
 
     // Set up two tables distributed in the same way. Try this with the data distributed into
     // different number of partitions.
     for (numPartitions <- 1 until 10 by 4) {
-      testData.repartition(numPartitions, $"key").registerTempTable("t1")
-      testData2.repartition(numPartitions, $"a").registerTempTable("t2")
+      withTempTable("t1", "t2") {
+        testData.repartition(numPartitions, $"key").registerTempTable("t1")
+        testData2.repartition(numPartitions, $"a").registerTempTable("t2")
+        sqlContext.cacheTable("t1")
+        sqlContext.cacheTable("t2")
+
+        // Joining them should result in no exchanges.
+        verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 0)
+        checkAnswer(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"),
+          sql("SELECT * FROM testData t1 JOIN testData2 t2 ON t1.key = t2.a"))
+
+        // Grouping on the partition key should result in no exchanges
+        verifyNumExchanges(sql("SELECT count(*) FROM t1 GROUP BY key"), 0)
+        checkAnswer(sql("SELECT count(*) FROM t1 GROUP BY key"),
+          sql("SELECT count(*) FROM testData GROUP BY key"))
+
+        sqlContext.uncacheTable("t1")
+        sqlContext.uncacheTable("t2")
+      }
+    }
+
+    // Distribute the tables into non-matching number of partitions. Need to shuffle one side.
+    withTempTable("t1", "t2") {
+      testData.repartition(6, $"key").registerTempTable("t1")
+      testData2.repartition(3, $"a").registerTempTable("t2")
       sqlContext.cacheTable("t1")
       sqlContext.cacheTable("t2")
 
-      // Joining them should result in no exchanges.
-      verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 0)
-      checkAnswer(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"),
-        sql("SELECT * FROM testData t1 JOIN testData2 t2 ON t1.key = t2.a"))
+      val query = sql("SELECT key, value, a, b FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a")
+      verifyNumExchanges(query, 1)
+      assert(query.queryExecution.executedPlan.outputPartitioning.numPartitions === 6)
+      checkAnswer(
+        query,
+        testData.join(testData2, $"key" === $"a").select($"key", $"value", $"a", $"b"))
+      sqlContext.uncacheTable("t1")
+      sqlContext.uncacheTable("t2")
+    }
 
-      // Grouping on the partition key should result in no exchanges
-      verifyNumExchanges(sql("SELECT count(*) FROM t1 GROUP BY key"), 0)
-      checkAnswer(sql("SELECT count(*) FROM t1 GROUP BY key"),
-        sql("SELECT count(*) FROM testData GROUP BY key"))
+    // One side of join is not partitioned in the desired way. Need to shuffle one side.
+    withTempTable("t1", "t2") {
+      testData.repartition(6, $"value").registerTempTable("t1")
+      testData2.repartition(6, $"a").registerTempTable("t2")
+      sqlContext.cacheTable("t1")
+      sqlContext.cacheTable("t2")
 
+      val query = sql("SELECT key, value, a, b FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a")
+      verifyNumExchanges(query, 1)
+      assert(query.queryExecution.executedPlan.outputPartitioning.numPartitions === 6)
+      checkAnswer(
+        query,
+        testData.join(testData2, $"key" === $"a").select($"key", $"value", $"a", $"b"))
       sqlContext.uncacheTable("t1")
       sqlContext.uncacheTable("t2")
-      sqlContext.dropTempTable("t1")
-      sqlContext.dropTempTable("t2")
     }
 
-    // Distribute the tables into non-matching number of partitions. Need to shuffle.
-    testData.repartition(6, $"key").registerTempTable("t1")
-    testData2.repartition(3, $"a").registerTempTable("t2")
-    sqlContext.cacheTable("t1")
-    sqlContext.cacheTable("t2")
+    withTempTable("t1", "t2") {
+      testData.repartition(6, $"value").registerTempTable("t1")
+      testData2.repartition(12, $"a").registerTempTable("t2")
+      sqlContext.cacheTable("t1")
+      sqlContext.cacheTable("t2")
 
-    verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 2)
-    sqlContext.uncacheTable("t1")
-    sqlContext.uncacheTable("t2")
-    sqlContext.dropTempTable("t1")
-    sqlContext.dropTempTable("t2")
+      val query = sql("SELECT key, value, a, b FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a")
+      verifyNumExchanges(query, 1)
+      assert(query.queryExecution.executedPlan.outputPartitioning.numPartitions === 12)
+      checkAnswer(
+        query,
+        testData.join(testData2, $"key" === $"a").select($"key", $"value", $"a", $"b"))
+      sqlContext.uncacheTable("t1")
+      sqlContext.uncacheTable("t2")
+    }
 
-    // One side of join is not partitioned in the desired way. Need to shuffle.
-    testData.repartition(6, $"value").registerTempTable("t1")
-    testData2.repartition(6, $"a").registerTempTable("t2")
-    sqlContext.cacheTable("t1")
-    sqlContext.cacheTable("t2")
+    // One side of join is not partitioned in the desired way. Since the number of partitions of
+    // the side that has already partitioned is smaller than the side that is not partitioned,
+    // we shuffle both side.
+    withTempTable("t1", "t2") {
+      testData.repartition(6, $"value").registerTempTable("t1")
+      testData2.repartition(3, $"a").registerTempTable("t2")
+      sqlContext.cacheTable("t1")
+      sqlContext.cacheTable("t2")
 
-    verifyNumExchanges(sql("SELECT * FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a"), 2)
-    sqlContext.uncacheTable("t1")
-    sqlContext.uncacheTable("t2")
-    sqlContext.dropTempTable("t1")
-    sqlContext.dropTempTable("t2")
+      val query = sql("SELECT key, value, a, b FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a")
+      verifyNumExchanges(query, 2)
+      checkAnswer(
+        query,
+        testData.join(testData2, $"key" === $"a").select($"key", $"value", $"a", $"b"))
+      sqlContext.uncacheTable("t1")
+      sqlContext.uncacheTable("t2")
+    }
+
+    // repartition's column ordering is different from group by column ordering.
+    // But they use the same set of columns.
+    withTempTable("t1") {
+      testData.repartition(6, $"value", $"key").registerTempTable("t1")
+      sqlContext.cacheTable("t1")
+
+      val query = sql("SELECT value, key from t1 group by key, value")
+      verifyNumExchanges(query, 0)
+      checkAnswer(
+        query,
+        testData.distinct().select($"value", $"key"))
+      sqlContext.uncacheTable("t1")
+    }
+
+    // repartition's column ordering is different from join condition's column ordering.
+    // We will still shuffle because hashcodes of a row depend on the column ordering.
+    // If we do not shuffle, we may actually partition two tables in totally two different way.
+    // See PartitioningSuite for more details.
+    withTempTable("t1", "t2") {
+      val df1 = testData
+      df1.repartition(6, $"value", $"key").registerTempTable("t1")
+      val df2 = testData2.select($"a", $"b".cast("string"))
+      df2.repartition(6, $"a", $"b").registerTempTable("t2")
+      sqlContext.cacheTable("t1")
+      sqlContext.cacheTable("t2")
+
+      val query =
+        sql("SELECT key, value, a, b FROM t1 t1 JOIN t2 t2 ON t1.key = t2.a and t1.value = t2.b")
+      verifyNumExchanges(query, 1)
+      assert(query.queryExecution.executedPlan.outputPartitioning.numPartitions === 6)
+      checkAnswer(
+        query,
+        df1.join(df2, $"key" === $"a" && $"value" === $"b").select($"key", $"value", $"a", $"b"))
+      sqlContext.uncacheTable("t1")
+      sqlContext.uncacheTable("t2")
+    }
   }
 }

From 62bb290773c9f9fa53cbe6d4eedc6e153761a763 Mon Sep 17 00:00:00 2001
From: Jacek Laskowski <jacek.laskowski@deepsense.io>
Date: Fri, 6 Nov 2015 20:05:18 +0000
Subject: [PATCH 536/896] Typo fixes + code readability improvements

Author: Jacek Laskowski <jacek.laskowski@deepsense.io>

Closes #9501 from jaceklaskowski/typos-with-style.
---
 .../scala/org/apache/spark/rdd/HadoopRDD.scala     | 14 ++++++--------
 .../org/apache/spark/scheduler/DAGScheduler.scala  | 12 +++++++++---
 .../apache/spark/scheduler/ShuffleMapTask.scala    | 10 +++++-----
 .../scala/org/apache/spark/scheduler/TaskSet.scala |  2 +-
 4 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
index d841f05ec52c..0453614f6a1d 100644
--- a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -88,8 +88,8 @@ private[spark] class HadoopPartition(rddId: Int, idx: Int, s: InputSplit)
  *
  * @param sc The SparkContext to associate the RDD with.
  * @param broadcastedConf A general Hadoop Configuration, or a subclass of it. If the enclosed
- *     variabe references an instance of JobConf, then that JobConf will be used for the Hadoop job.
- *     Otherwise, a new JobConf will be created on each slave using the enclosed Configuration.
+ *   variable references an instance of JobConf, then that JobConf will be used for the Hadoop job.
+ *   Otherwise, a new JobConf will be created on each slave using the enclosed Configuration.
  * @param initLocalJobConfFuncOpt Optional closure used to initialize any JobConf that HadoopRDD
  *     creates.
  * @param inputFormatClass Storage format of the data to be read.
@@ -123,7 +123,7 @@ class HadoopRDD[K, V](
       sc,
       sc.broadcast(new SerializableConfiguration(conf))
         .asInstanceOf[Broadcast[SerializableConfiguration]],
-      None /* initLocalJobConfFuncOpt */,
+      initLocalJobConfFuncOpt = None,
       inputFormatClass,
       keyClass,
       valueClass,
@@ -184,8 +184,9 @@ class HadoopRDD[K, V](
   protected def getInputFormat(conf: JobConf): InputFormat[K, V] = {
     val newInputFormat = ReflectionUtils.newInstance(inputFormatClass.asInstanceOf[Class[_]], conf)
       .asInstanceOf[InputFormat[K, V]]
-    if (newInputFormat.isInstanceOf[Configurable]) {
-      newInputFormat.asInstanceOf[Configurable].setConf(conf)
+    newInputFormat match {
+      case c: Configurable => c.setConf(conf)
+      case _ =>
     }
     newInputFormat
   }
@@ -195,9 +196,6 @@ class HadoopRDD[K, V](
     // add the credentials here as this can be called before SparkContext initialized
     SparkHadoopUtil.get.addCredentials(jobConf)
     val inputFormat = getInputFormat(jobConf)
-    if (inputFormat.isInstanceOf[Configurable]) {
-      inputFormat.asInstanceOf[Configurable].setConf(jobConf)
-    }
     val inputSplits = inputFormat.getSplits(jobConf, minPartitions)
     val array = new Array[Partition](inputSplits.size)
     for (i <- 0 until inputSplits.size) {
diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index a1f0fd05f661..4a9518fff4e7 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -541,8 +541,7 @@ class DAGScheduler(
   }
 
   /**
-   * Submit an action job to the scheduler and get a JobWaiter object back. The JobWaiter object
-   * can be used to block until the the job finishes executing or can be used to cancel the job.
+   * Submit an action job to the scheduler.
    *
    * @param rdd target RDD to run tasks on
    * @param func a function to run on each partition of the RDD
@@ -551,6 +550,11 @@ class DAGScheduler(
    * @param callSite where in the user program this job was called
    * @param resultHandler callback to pass each result to
    * @param properties scheduler properties to attach to this job, e.g. fair scheduler pool name
+   *
+   * @return a JobWaiter object that can be used to block until the job finishes executing
+   *         or can be used to cancel the job.
+   *
+   * @throws IllegalArgumentException when partitions ids are illegal
    */
   def submitJob[T, U](
       rdd: RDD[T],
@@ -584,7 +588,7 @@ class DAGScheduler(
 
   /**
    * Run an action job on the given RDD and pass all the results to the resultHandler function as
-   * they arrive. Throws an exception if the job fials, or returns normally if successful.
+   * they arrive.
    *
    * @param rdd target RDD to run tasks on
    * @param func a function to run on each partition of the RDD
@@ -593,6 +597,8 @@ class DAGScheduler(
    * @param callSite where in the user program this job was called
    * @param resultHandler callback to pass each result to
    * @param properties scheduler properties to attach to this job, e.g. fair scheduler pool name
+   *
+   * @throws Exception when the job fails
    */
   def runJob[T, U](
       rdd: RDD[T],
diff --git a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapTask.scala b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapTask.scala
index f478f9982afe..ea97ef0e746d 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapTask.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ShuffleMapTask.scala
@@ -27,11 +27,11 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.shuffle.ShuffleWriter
 
 /**
-* A ShuffleMapTask divides the elements of an RDD into multiple buckets (based on a partitioner
-* specified in the ShuffleDependency).
-*
-* See [[org.apache.spark.scheduler.Task]] for more information.
-*
+ * A ShuffleMapTask divides the elements of an RDD into multiple buckets (based on a partitioner
+ * specified in the ShuffleDependency).
+ *
+ * See [[org.apache.spark.scheduler.Task]] for more information.
+ *
  * @param stageId id of the stage this task belongs to
  * @param taskBinary broadcast version of the RDD and the ShuffleDependency. Once deserialized,
  *                   the type should be (RDD[_], ShuffleDependency[_, _, _]).
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSet.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSet.scala
index be8526ba9b94..517c8991aed7 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSet.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSet.scala
@@ -29,7 +29,7 @@ private[spark] class TaskSet(
     val stageAttemptId: Int,
     val priority: Int,
     val properties: Properties) {
-    val id: String = stageId + "." + stageAttemptId
+  val id: String = stageId + "." + stageAttemptId
 
   override def toString: String = "TaskSet " + id
 }

From 49f1a820372d1cba41f3f00d07eb5728f2ed6705 Mon Sep 17 00:00:00 2001
From: Imran Rashid <irashid@cloudera.com>
Date: Fri, 6 Nov 2015 20:06:24 +0000
Subject: [PATCH 537/896] [SPARK-10116][CORE] XORShiftRandom.hashSeed is random
 in high bits

https://issues.apache.org/jira/browse/SPARK-10116

This is really trivial, just happened to notice it -- if `XORShiftRandom.hashSeed` is really supposed to have random bits throughout (as the comment implies), it needs to do something for the conversion to `long`.

mengxr mkolod

Author: Imran Rashid <irashid@cloudera.com>

Closes #8314 from squito/SPARK-10116.
---
 R/pkg/inst/tests/test_sparkSQL.R              |  8 +--
 .../spark/util/random/XORShiftRandom.scala    |  6 ++-
 .../java/org/apache/spark/JavaAPISuite.java   | 20 ++++---
 .../spark/rdd/PairRDDFunctionsSuite.scala     | 52 +++++++++++++------
 .../util/random/XORShiftRandomSuite.scala     | 15 ++++++
 .../MultilayerPerceptronClassifierSuite.scala |  5 +-
 .../spark/ml/feature/Word2VecSuite.scala      | 16 ++++--
 .../clustering/StreamingKMeansSuite.scala     | 13 +++--
 python/pyspark/ml/feature.py                  | 20 +++----
 python/pyspark/ml/recommendation.py           |  6 +--
 python/pyspark/mllib/recommendation.py        |  4 +-
 python/pyspark/sql/dataframe.py               |  6 +--
 .../catalyst/expressions/RandomSuite.scala    |  8 +--
 .../apache/spark/sql/JavaDataFrameSuite.java  |  6 ++-
 .../apache/spark/sql/DataFrameStatSuite.scala |  4 +-
 15 files changed, 128 insertions(+), 61 deletions(-)

diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 816315b1e4e1..92cff1fba719 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -875,9 +875,9 @@ test_that("column binary mathfunctions", {
   expect_equal(collect(select(df, shiftRight(df$b, 1)))[4, 1], 4)
   expect_equal(collect(select(df, shiftRightUnsigned(df$b, 1)))[4, 1], 4)
   expect_equal(class(collect(select(df, rand()))[2, 1]), "numeric")
-  expect_equal(collect(select(df, rand(1)))[1, 1], 0.45, tolerance = 0.01)
+  expect_equal(collect(select(df, rand(1)))[1, 1], 0.134, tolerance = 0.01)
   expect_equal(class(collect(select(df, randn()))[2, 1]), "numeric")
-  expect_equal(collect(select(df, randn(1)))[1, 1], -0.0111, tolerance = 0.01)
+  expect_equal(collect(select(df, randn(1)))[1, 1], -1.03, tolerance = 0.01)
 })
 
 test_that("string operators", {
@@ -1458,8 +1458,8 @@ test_that("sampleBy() on a DataFrame", {
   fractions <- list("0" = 0.1, "1" = 0.2)
   sample <- sampleBy(df, "key", fractions, 0)
   result <- collect(orderBy(count(groupBy(sample, "key")), "key"))
-  expect_identical(as.list(result[1, ]), list(key = "0", count = 2))
-  expect_identical(as.list(result[2, ]), list(key = "1", count = 10))
+  expect_identical(as.list(result[1, ]), list(key = "0", count = 3))
+  expect_identical(as.list(result[2, ]), list(key = "1", count = 7))
 })
 
 test_that("SQL error message is returned from JVM", {
diff --git a/core/src/main/scala/org/apache/spark/util/random/XORShiftRandom.scala b/core/src/main/scala/org/apache/spark/util/random/XORShiftRandom.scala
index 85fb923cd9bc..e8cdb6e98bf3 100644
--- a/core/src/main/scala/org/apache/spark/util/random/XORShiftRandom.scala
+++ b/core/src/main/scala/org/apache/spark/util/random/XORShiftRandom.scala
@@ -60,9 +60,11 @@ private[spark] class XORShiftRandom(init: Long) extends JavaRandom(init) {
 private[spark] object XORShiftRandom {
 
   /** Hash seeds to have 0/1 bits throughout. */
-  private def hashSeed(seed: Long): Long = {
+  private[random] def hashSeed(seed: Long): Long = {
     val bytes = ByteBuffer.allocate(java.lang.Long.SIZE).putLong(seed).array()
-    MurmurHash3.bytesHash(bytes)
+    val lowBits = MurmurHash3.bytesHash(bytes)
+    val highBits = MurmurHash3.bytesHash(bytes, lowBits)
+    (highBits.toLong << 32) | (lowBits.toLong & 0xFFFFFFFFL)
   }
 
   /**
diff --git a/core/src/test/java/org/apache/spark/JavaAPISuite.java b/core/src/test/java/org/apache/spark/JavaAPISuite.java
index fd8f7f39b7cc..4d4e9820500e 100644
--- a/core/src/test/java/org/apache/spark/JavaAPISuite.java
+++ b/core/src/test/java/org/apache/spark/JavaAPISuite.java
@@ -146,21 +146,29 @@ public void intersection() {
   public void sample() {
     List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
     JavaRDD<Integer> rdd = sc.parallelize(ints);
-    JavaRDD<Integer> sample20 = rdd.sample(true, 0.2, 3);
+    // the seeds here are "magic" to make this work out nicely
+    JavaRDD<Integer> sample20 = rdd.sample(true, 0.2, 8);
     Assert.assertEquals(2, sample20.count());
-    JavaRDD<Integer> sample20WithoutReplacement = rdd.sample(false, 0.2, 5);
+    JavaRDD<Integer> sample20WithoutReplacement = rdd.sample(false, 0.2, 2);
     Assert.assertEquals(2, sample20WithoutReplacement.count());
   }
 
   @Test
   public void randomSplit() {
-    List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
+    List<Integer> ints = new ArrayList<>(1000);
+    for (int i = 0; i < 1000; i++) {
+      ints.add(i);
+    }
     JavaRDD<Integer> rdd = sc.parallelize(ints);
     JavaRDD<Integer>[] splits = rdd.randomSplit(new double[] { 0.4, 0.6, 1.0 }, 31);
+    // the splits aren't perfect -- not enough data for them to be -- just check they're about right
     Assert.assertEquals(3, splits.length);
-    Assert.assertEquals(1, splits[0].count());
-    Assert.assertEquals(2, splits[1].count());
-    Assert.assertEquals(7, splits[2].count());
+    long s0 = splits[0].count();
+    long s1 = splits[1].count();
+    long s2 = splits[2].count();
+    Assert.assertTrue(s0 + " not within expected range", s0 > 150 && s0 < 250);
+    Assert.assertTrue(s1 + " not within expected range", s1 > 250 && s0 < 350);
+    Assert.assertTrue(s2 + " not within expected range", s2 > 430 && s2 < 570);
   }
 
   @Test
diff --git a/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala b/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
index 1321ec84735b..7d2cfcca9436 100644
--- a/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rdd/PairRDDFunctionsSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.rdd
 
+import org.apache.commons.math3.distribution.{PoissonDistribution, BinomialDistribution}
 import org.apache.hadoop.fs.FileSystem
 import org.apache.hadoop.mapred._
 import org.apache.hadoop.util.Progressable
@@ -578,17 +579,36 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       (x: Int) => if (x % 10 < (10 * fractionPositive).toInt) "1" else "0"
     }
 
-    def checkSize(exact: Boolean,
-        withReplacement: Boolean,
-        expected: Long,
-        actual: Long,
-        p: Double): Boolean = {
+    def assertBinomialSample(
+        exact: Boolean,
+        actual: Int,
+        trials: Int,
+        p: Double): Unit = {
+      if (exact) {
+        assert(actual == math.ceil(p * trials).toInt)
+      } else {
+        val dist = new BinomialDistribution(trials, p)
+        val q = dist.cumulativeProbability(actual)
+        withClue(s"p = $p: trials = $trials") {
+          assert(q >= 0.001 && q <= 0.999)
+        }
+      }
+    }
+
+    def assertPoissonSample(
+        exact: Boolean,
+        actual: Int,
+        trials: Int,
+        p: Double): Unit = {
       if (exact) {
-        return expected == actual
+        assert(actual == math.ceil(p * trials).toInt)
+      } else {
+        val dist = new PoissonDistribution(p * trials)
+        val q = dist.cumulativeProbability(actual)
+        withClue(s"p = $p: trials = $trials") {
+          assert(q >= 0.001 && q <= 0.999)
+        }
       }
-      val stdev = if (withReplacement) math.sqrt(expected) else math.sqrt(expected * p * (1 - p))
-      // Very forgiving margin since we're dealing with very small sample sizes most of the time
-      math.abs(actual - expected) <= 6 * stdev
     }
 
     def testSampleExact(stratifiedData: RDD[(String, Int)],
@@ -613,8 +633,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
         samplingRate: Double,
         seed: Long,
         n: Long): Unit = {
-      val expectedSampleSize = stratifiedData.countByKey()
-        .mapValues(count => math.ceil(count * samplingRate).toInt)
+      val trials = stratifiedData.countByKey()
       val fractions = Map("1" -> samplingRate, "0" -> samplingRate)
       val sample = if (exact) {
         stratifiedData.sampleByKeyExact(false, fractions, seed)
@@ -623,8 +642,10 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       }
       val sampleCounts = sample.countByKey()
       val takeSample = sample.collect()
-      sampleCounts.foreach { case(k, v) =>
-        assert(checkSize(exact, false, expectedSampleSize(k), v, samplingRate)) }
+      sampleCounts.foreach { case (k, v) =>
+        assertBinomialSample(exact = exact, actual = v.toInt, trials = trials(k).toInt,
+          p = samplingRate)
+      }
       assert(takeSample.size === takeSample.toSet.size)
       takeSample.foreach { x => assert(1 <= x._2 && x._2 <= n, s"elements not in [1, $n]") }
     }
@@ -635,6 +656,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
         samplingRate: Double,
         seed: Long,
         n: Long): Unit = {
+      val trials = stratifiedData.countByKey()
       val expectedSampleSize = stratifiedData.countByKey().mapValues(count =>
         math.ceil(count * samplingRate).toInt)
       val fractions = Map("1" -> samplingRate, "0" -> samplingRate)
@@ -646,7 +668,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
       val sampleCounts = sample.countByKey()
       val takeSample = sample.collect()
       sampleCounts.foreach { case (k, v) =>
-        assert(checkSize(exact, true, expectedSampleSize(k), v, samplingRate))
+        assertPoissonSample(exact, actual = v.toInt, trials = trials(k).toInt, p = samplingRate)
       }
       val groupedByKey = takeSample.groupBy(_._1)
       for ((key, v) <- groupedByKey) {
@@ -657,7 +679,7 @@ class PairRDDFunctionsSuite extends SparkFunSuite with SharedSparkContext {
           if (exact) {
             assert(v.toSet.size <= expectedSampleSize(key))
           } else {
-            assert(checkSize(false, true, expectedSampleSize(key), v.toSet.size, samplingRate))
+            assertPoissonSample(false, actual = v.toSet.size, trials(key).toInt, p = samplingRate)
           }
         }
       }
diff --git a/core/src/test/scala/org/apache/spark/util/random/XORShiftRandomSuite.scala b/core/src/test/scala/org/apache/spark/util/random/XORShiftRandomSuite.scala
index d26667bf720c..a5b50fce5c0a 100644
--- a/core/src/test/scala/org/apache/spark/util/random/XORShiftRandomSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/random/XORShiftRandomSuite.scala
@@ -65,4 +65,19 @@ class XORShiftRandomSuite extends SparkFunSuite with Matchers {
     val random = new XORShiftRandom(0L)
     assert(random.nextInt() != 0)
   }
+
+  test ("hashSeed has random bits throughout") {
+    val totalBitCount = (0 until 10).map { seed =>
+      val hashed = XORShiftRandom.hashSeed(seed)
+      val bitCount = java.lang.Long.bitCount(hashed)
+      // make sure we have roughly equal numbers of 0s and 1s.  Mostly just check that we
+      // don't have all 0s or 1s in the high bits
+      bitCount should be > 20
+      bitCount should be < 44
+      bitCount
+    }.sum
+    // and over all the seeds, very close to equal numbers of 0s & 1s
+    totalBitCount should be > (32 * 10 - 30)
+    totalBitCount should be < (32 * 10 + 30)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
index 17db8c44777d..a326432d017f 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/MultilayerPerceptronClassifierSuite.scala
@@ -61,8 +61,9 @@ class MultilayerPerceptronClassifierSuite extends SparkFunSuite with MLlibTestSp
 
     val xMean = Array(5.843, 3.057, 3.758, 1.199)
     val xVariance = Array(0.6856, 0.1899, 3.116, 0.581)
+    // the input seed is somewhat magic, to make this test pass
     val rdd = sc.parallelize(generateMultinomialLogisticInput(
-      coefficients, xMean, xVariance, true, nPoints, 42), 2)
+      coefficients, xMean, xVariance, true, nPoints, 1), 2)
     val dataFrame = sqlContext.createDataFrame(rdd).toDF("label", "features")
     val numClasses = 3
     val numIterations = 100
@@ -70,7 +71,7 @@ class MultilayerPerceptronClassifierSuite extends SparkFunSuite with MLlibTestSp
     val trainer = new MultilayerPerceptronClassifier()
       .setLayers(layers)
       .setBlockSize(1)
-      .setSeed(11L)
+      .setSeed(11L) // currently this seed is ignored
       .setMaxIter(numIterations)
     val model = trainer.fit(dataFrame)
     val numFeatures = dataFrame.select("features").first().getAs[Vector](0).size
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
index a2e46f202995..23dfdaa9f8fc 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
@@ -66,9 +66,12 @@ class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext {
     // copied model must have the same parent.
     MLTestingUtils.checkCopy(model)
 
+    // These expectations are just magic values, characterizing the current
+    // behavior.  The test needs to be updated to be more general, see SPARK-11502
+    val magicExp = Vectors.dense(0.30153007534417237, -0.6833061711354689, 0.5116530778733167)
     model.transform(docDF).select("result", "expected").collect().foreach {
       case Row(vector1: Vector, vector2: Vector) =>
-        assert(vector1 ~== vector2 absTol 1E-5, "Transformed vector is different with expected.")
+        assert(vector1 ~== magicExp absTol 1E-5, "Transformed vector is different with expected.")
     }
   }
 
@@ -99,8 +102,15 @@ class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext {
     val realVectors = model.getVectors.sort("word").select("vector").map {
       case Row(v: Vector) => v
     }.collect()
+    // These expectations are just magic values, characterizing the current
+    // behavior.  The test needs to be updated to be more general, see SPARK-11502
+    val magicExpected = Seq(
+      Vectors.dense(0.3326166272163391, -0.5603077411651611, -0.2309209555387497),
+      Vectors.dense(0.32463887333869934, -0.9306551218032837, 1.393115520477295),
+      Vectors.dense(-0.27150997519493103, 0.4372006058692932, -0.13465698063373566)
+    )
 
-    realVectors.zip(expectedVectors).foreach {
+    realVectors.zip(magicExpected).foreach {
       case (real, expected) =>
         assert(real ~== expected absTol 1E-5, "Actual vector is different from expected.")
     }
@@ -122,7 +132,7 @@ class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext {
       .setSeed(42L)
       .fit(docDF)
 
-    val expectedSimilarity = Array(0.2789285076917586, -0.6336972059851644)
+    val expectedSimilarity = Array(0.18032623242822343, -0.5717976464798823)
     val (synonyms, similarity) = model.findSynonyms("a", 2).map {
       case Row(w: String, sim: Double) => (w, sim)
     }.collect().unzip
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/clustering/StreamingKMeansSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/clustering/StreamingKMeansSuite.scala
index 3645d29dccdb..65e37c64d404 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/clustering/StreamingKMeansSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/clustering/StreamingKMeansSuite.scala
@@ -98,9 +98,16 @@ class StreamingKMeansSuite extends SparkFunSuite with TestSuiteBase {
     runStreams(ssc, numBatches, numBatches)
 
     // check that estimated centers are close to true centers
-    // NOTE exact assignment depends on the initialization!
-    assert(centers(0) ~== kMeans.latestModel().clusterCenters(0) absTol 1E-1)
-    assert(centers(1) ~== kMeans.latestModel().clusterCenters(1) absTol 1E-1)
+    // cluster ordering is arbitrary, so choose closest cluster
+    val d0 = Vectors.sqdist(kMeans.latestModel().clusterCenters(0), centers(0))
+    val d1 = Vectors.sqdist(kMeans.latestModel().clusterCenters(0), centers(1))
+    val (c0, c1) = if (d0 < d1) {
+      (centers(0), centers(1))
+    } else {
+      (centers(1), centers(0))
+    }
+    assert(c0 ~== kMeans.latestModel().clusterCenters(0) absTol 1E-1)
+    assert(c1 ~== kMeans.latestModel().clusterCenters(1) absTol 1E-1)
   }
 
   test("detecting dying clusters") {
diff --git a/python/pyspark/ml/feature.py b/python/pyspark/ml/feature.py
index c7b6dd926c3e..b02d41b52ab2 100644
--- a/python/pyspark/ml/feature.py
+++ b/python/pyspark/ml/feature.py
@@ -1788,21 +1788,21 @@ class Word2Vec(JavaEstimator, HasStepSize, HasMaxIter, HasSeed, HasInputCol, Has
     +----+--------------------+
     |word|              vector|
     +----+--------------------+
-    |   a|[-0.3511952459812...|
-    |   b|[0.29077222943305...|
-    |   c|[0.02315592765808...|
+    |   a|[0.09461779892444...|
+    |   b|[1.15474212169647...|
+    |   c|[-0.3794820010662...|
     +----+--------------------+
     ...
     >>> model.findSynonyms("a", 2).show()
-    +----+-------------------+
-    |word|         similarity|
-    +----+-------------------+
-    |   b|0.29255685145799626|
-    |   c|-0.5414068302988307|
-    +----+-------------------+
+    +----+--------------------+
+    |word|          similarity|
+    +----+--------------------+
+    |   b| 0.16782984556103436|
+    |   c|-0.46761559092107646|
+    +----+--------------------+
     ...
     >>> model.transform(doc).head().model
-    DenseVector([-0.0422, -0.5138, -0.2546, 0.6885, 0.276])
+    DenseVector([0.5524, -0.4995, -0.3599, 0.0241, 0.3461])
 
     .. versionadded:: 1.4.0
     """
diff --git a/python/pyspark/ml/recommendation.py b/python/pyspark/ml/recommendation.py
index ec5748a1cfe9..b44c66f73cc4 100644
--- a/python/pyspark/ml/recommendation.py
+++ b/python/pyspark/ml/recommendation.py
@@ -76,11 +76,11 @@ class ALS(JavaEstimator, HasCheckpointInterval, HasMaxIter, HasPredictionCol, Ha
     >>> test = sqlContext.createDataFrame([(0, 2), (1, 0), (2, 0)], ["user", "item"])
     >>> predictions = sorted(model.transform(test).collect(), key=lambda r: r[0])
     >>> predictions[0]
-    Row(user=0, item=2, prediction=0.39...)
+    Row(user=0, item=2, prediction=-0.13807615637779236)
     >>> predictions[1]
-    Row(user=1, item=0, prediction=3.19...)
+    Row(user=1, item=0, prediction=2.6258413791656494)
     >>> predictions[2]
-    Row(user=2, item=0, prediction=-1.15...)
+    Row(user=2, item=0, prediction=-1.5018409490585327)
 
     .. versionadded:: 1.4.0
     """
diff --git a/python/pyspark/mllib/recommendation.py b/python/pyspark/mllib/recommendation.py
index b9442b0d16c0..93e47a797f49 100644
--- a/python/pyspark/mllib/recommendation.py
+++ b/python/pyspark/mllib/recommendation.py
@@ -101,12 +101,12 @@ class MatrixFactorizationModel(JavaModelWrapper, JavaSaveable, JavaLoader):
 
     >>> model = ALS.train(ratings, 1, nonnegative=True, seed=10)
     >>> model.predict(2, 2)
-    3.8...
+    3.73...
 
     >>> df = sqlContext.createDataFrame([Rating(1, 1, 1.0), Rating(1, 2, 2.0), Rating(2, 1, 2.0)])
     >>> model = ALS.train(df, 1, nonnegative=True, seed=10)
     >>> model.predict(2, 2)
-    3.8...
+    3.73...
 
     >>> model = ALS.trainImplicit(ratings, 1, nonnegative=True, seed=10)
     >>> model.predict(2, 2)
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 3baff8147753..765a4511b64b 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -436,7 +436,7 @@ def sample(self, withReplacement, fraction, seed=None):
         """Returns a sampled subset of this :class:`DataFrame`.
 
         >>> df.sample(False, 0.5, 42).count()
-        1
+        2
         """
         assert fraction >= 0.0, "Negative fraction value: %s" % fraction
         seed = seed if seed is not None else random.randint(0, sys.maxsize)
@@ -463,8 +463,8 @@ def sampleBy(self, col, fractions, seed=None):
         +---+-----+
         |key|count|
         +---+-----+
-        |  0|    3|
-        |  1|    8|
+        |  0|    5|
+        |  1|    9|
         +---+-----+
 
         """
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala
index 4a644d136f09..b7a0d44fa7e5 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/RandomSuite.scala
@@ -24,12 +24,12 @@ import org.apache.spark.SparkFunSuite
 class RandomSuite extends SparkFunSuite with ExpressionEvalHelper {
 
   test("random") {
-    checkDoubleEvaluation(Rand(30), 0.7363714192755834 +- 0.001)
-    checkDoubleEvaluation(Randn(30), 0.5181478766595276 +- 0.001)
+    checkDoubleEvaluation(Rand(30), 0.31429268272540556 +- 0.001)
+    checkDoubleEvaluation(Randn(30), -0.4798519469521663 +- 0.001)
   }
 
   test("SPARK-9127 codegen with long seed") {
-    checkDoubleEvaluation(Rand(5419823303878592871L), 0.4061913198963727 +- 0.001)
-    checkDoubleEvaluation(Randn(5419823303878592871L), -0.24417152005343168 +- 0.001)
+    checkDoubleEvaluation(Rand(5419823303878592871L), 0.2304755080444375 +- 0.001)
+    checkDoubleEvaluation(Randn(5419823303878592871L), -1.2824262718225607 +- 0.001)
   }
 }
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index 49f516e86d75..40bff57a17a0 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -257,7 +257,9 @@ public void testSampleBy() {
     DataFrame df = context.range(0, 100, 1, 2).select(col("id").mod(3).as("key"));
     DataFrame sampled = df.stat().<Integer>sampleBy("key", ImmutableMap.of(0, 0.1, 1, 0.2), 0L);
     Row[] actual = sampled.groupBy("key").count().orderBy("key").collect();
-    Row[] expected = {RowFactory.create(0, 5), RowFactory.create(1, 8)};
-    Assert.assertArrayEquals(expected, actual);
+    Assert.assertEquals(0, actual[0].getLong(0));
+    Assert.assertTrue(0 <= actual[0].getLong(1) && actual[0].getLong(1) <= 8);
+    Assert.assertEquals(1, actual[1].getLong(0));
+    Assert.assertTrue(2 <= actual[1].getLong(1) && actual[1].getLong(1) <= 13);
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala
index 6524abcf5e97..b15af42caa3a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala
@@ -41,7 +41,7 @@ class DataFrameStatSuite extends QueryTest with SharedSQLContext {
     val data = sparkContext.parallelize(1 to n, 2).toDF("id")
     checkAnswer(
       data.sample(withReplacement = false, 0.05, seed = 13),
-      Seq(16, 23, 88, 100).map(Row(_))
+      Seq(3, 17, 27, 58, 62).map(Row(_))
     )
   }
 
@@ -186,6 +186,6 @@ class DataFrameStatSuite extends QueryTest with SharedSQLContext {
     val sampled = df.stat.sampleBy("key", Map(0 -> 0.1, 1 -> 0.2), 0L)
     checkAnswer(
       sampled.groupBy("key").count().orderBy("key"),
-      Seq(Row(0, 5), Row(1, 8)))
+      Seq(Row(0, 6), Row(1, 11)))
   }
 }

From f328fedafd7bd084470a5e402de0429b5b7f8cd7 Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Fri, 6 Nov 2015 12:21:53 -0800
Subject: [PATCH 538/896] [SPARK-11450] [SQL] Add Unsafe Row processing to
 Expand

This PR enables the Expand operator to process and produce Unsafe Rows.

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9414 from hvanhovell/SPARK-11450.
---
 .../sql/catalyst/expressions/Projection.scala |  6 ++-
 .../apache/spark/sql/execution/Expand.scala   | 19 ++++---
 .../spark/sql/execution/basicOperators.scala  |  8 +--
 .../spark/sql/execution/ExpandSuite.scala     | 54 +++++++++++++++++++
 4 files changed, 73 insertions(+), 14 deletions(-)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/ExpandSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
index a6fe730f6dad..79dabe8e925a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
@@ -128,7 +128,11 @@ object UnsafeProjection {
    * Returns an UnsafeProjection for given sequence of Expressions (bounded).
    */
   def create(exprs: Seq[Expression]): UnsafeProjection = {
-    GenerateUnsafeProjection.generate(exprs)
+    val unsafeExprs = exprs.map(_ transform {
+      case CreateStruct(children) => CreateStructUnsafe(children)
+      case CreateNamedStruct(children) => CreateNamedStructUnsafe(children)
+    })
+    GenerateUnsafeProjection.generate(unsafeExprs)
   }
 
   def create(expr: Expression): UnsafeProjection = create(Seq(expr))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
index a458881f4094..55e95769d3fa 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
@@ -41,14 +41,21 @@ case class Expand(
   // as UNKNOWN partitioning
   override def outputPartitioning: Partitioning = UnknownPartitioning(0)
 
+  override def outputsUnsafeRows: Boolean = child.outputsUnsafeRows
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = true
+
+  private[this] val projection = {
+    if (outputsUnsafeRows) {
+      (exprs: Seq[Expression]) => UnsafeProjection.create(exprs, child.output)
+    } else {
+      (exprs: Seq[Expression]) => newMutableProjection(exprs, child.output)()
+    }
+  }
+
   protected override def doExecute(): RDD[InternalRow] = attachTree(this, "execute") {
     child.execute().mapPartitions { iter =>
-      // TODO Move out projection objects creation and transfer to
-      // workers via closure. However we can't assume the Projection
-      // is serializable because of the code gen, so we have to
-      // create the projections within each of the partition processing.
-      val groups = projections.map(ee => newProjection(ee, child.output)).toArray
-
+      val groups = projections.map(projection).toArray
       new Iterator[InternalRow] {
         private[this] var result: InternalRow = _
         private[this] var idx = -1  // -1 means the initial state
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index d5a803f8c4b2..799650a4f784 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -67,16 +67,10 @@ case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan)
 
   override def output: Seq[Attribute] = projectList.map(_.toAttribute)
 
-  /** Rewrite the project list to use unsafe expressions as needed. */
-  protected val unsafeProjectList = projectList.map(_ transform {
-    case CreateStruct(children) => CreateStructUnsafe(children)
-    case CreateNamedStruct(children) => CreateNamedStructUnsafe(children)
-  })
-
   protected override def doExecute(): RDD[InternalRow] = {
     val numRows = longMetric("numRows")
     child.execute().mapPartitions { iter =>
-      val project = UnsafeProjection.create(unsafeProjectList, child.output)
+      val project = UnsafeProjection.create(projectList, child.output)
       iter.map { row =>
         numRows += 1
         project(row)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ExpandSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExpandSuite.scala
new file mode 100644
index 000000000000..faef76d52ae7
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExpandSuite.scala
@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.sql.Row
+import org.apache.spark.sql.catalyst.expressions.{AttributeReference, BoundReference, Alias, Literal}
+import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.sql.types.IntegerType
+
+class ExpandSuite extends SparkPlanTest with SharedSQLContext {
+  import testImplicits.localSeqToDataFrameHolder
+
+  private def testExpand(f: SparkPlan => SparkPlan): Unit = {
+    val input = (1 to 1000).map(Tuple1.apply)
+    val projections = Seq.tabulate(2) { i =>
+      Alias(BoundReference(0, IntegerType, false), "id")() :: Alias(Literal(i), "gid")() :: Nil
+    }
+    val attributes = projections.head.map(_.toAttribute)
+    checkAnswer(
+      input.toDF(),
+      plan => Expand(projections, attributes, f(plan)),
+      input.flatMap(i => Seq.tabulate(2)(j => Row(i._1, j)))
+    )
+  }
+
+  test("inheriting child row type") {
+    val exprs = AttributeReference("a", IntegerType, false)() :: Nil
+    val plan = Expand(Seq(exprs), exprs, ConvertToUnsafe(LocalTableScan(exprs, Seq.empty)))
+    assert(plan.outputsUnsafeRows, "Expand should inherits the created row type from its child.")
+  }
+
+  test("expanding UnsafeRows") {
+    testExpand(ConvertToUnsafe)
+  }
+
+  test("expanding SafeRows") {
+    testExpand(identity)
+  }
+}

From 3a652f691b220fada0286f8d0a562c5657973d4d Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Fri, 6 Nov 2015 14:47:41 -0800
Subject: [PATCH 539/896] [SPARK-11561][SQL] Rename text data source's column
 name to value.

Author: Reynold Xin <rxin@databricks.com>

Closes #9527 from rxin/SPARK-11561.
---
 .../sql/execution/datasources/text/DefaultSource.scala      | 6 ++----
 .../spark/sql/execution/datasources/text/TextSuite.scala    | 2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
index 52c4421d7e87..4b8b8e4e74da 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
@@ -30,14 +30,12 @@ import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.mapred.SparkHadoopMapRedUtil
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.{UnsafeRow, GenericMutableRow}
+import org.apache.spark.sql.catalyst.expressions.UnsafeRow
 import org.apache.spark.sql.catalyst.expressions.codegen.{UnsafeRowWriter, BufferHolder}
-import org.apache.spark.sql.columnar.MutableUnsafeRow
 import org.apache.spark.sql.{AnalysisException, Row, SQLContext}
 import org.apache.spark.sql.execution.datasources.PartitionSpec
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types.{StringType, StructType}
-import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.SerializableConfiguration
 
 /**
@@ -78,7 +76,7 @@ private[sql] class TextRelation(
   extends HadoopFsRelation(maybePartitionSpec) {
 
   /** Data schema is always a single column, named "text". */
-  override def dataSchema: StructType = new StructType().add("text", StringType)
+  override def dataSchema: StructType = new StructType().add("value", StringType)
 
   /** This is an internal data source that outputs internal row format. */
   override val needConversion: Boolean = false
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala
index 0a2306c06646..914e516613f9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/text/TextSuite.scala
@@ -65,7 +65,7 @@ class TextSuite extends QueryTest with SharedSQLContext {
   /** Verifies data and schema. */
   private def verifyFrame(df: DataFrame): Unit = {
     // schema
-    assert(df.schema == new StructType().add("text", StringType))
+    assert(df.schema == new StructType().add("value", StringType))
 
     // verify content
     val data = df.collect()

From c447c9d54603890db7399fb80adc9fae40b71f64 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Fri, 6 Nov 2015 14:51:03 -0800
Subject: [PATCH 540/896] [SPARK-11217][ML] save/load for non-meta estimators
 and transformers

This PR implements the default save/load for non-meta estimators and transformers using the JSON serialization of param values. The saved metadata includes:

* class name
* uid
* timestamp
* paramMap

The save/load interface is similar to DataFrames. We use the current active context by default, which should be sufficient for most use cases.

~~~scala
instance.save("path")
instance.write.context(sqlContext).overwrite().save("path")

Instance.load("path")
~~~

The param handling is different from the design doc. We didn't save default and user-set params separately, and when we load it back, all parameters are user-set. This does cause issues. But it also cause other issues if we modify the default params.

TODOs:

* [x] Java test
* [ ] a follow-up PR to implement default save/load for all non-meta estimators and transformers

cc jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9454 from mengxr/SPARK-11217.
---
 .../apache/spark/ml/feature/Binarizer.scala   |  11 +-
 .../org/apache/spark/ml/param/params.scala    |   2 +-
 .../org/apache/spark/ml/util/ReadWrite.scala  | 220 ++++++++++++++++++
 .../ml/util/JavaDefaultReadWriteSuite.java    |  74 ++++++
 .../spark/ml/feature/BinarizerSuite.scala     |  11 +-
 .../spark/ml/util/DefaultReadWriteTest.scala  | 110 +++++++++
 .../apache/spark/ml/util/TempDirectory.scala  |  45 ++++
 7 files changed, 469 insertions(+), 4 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
 create mode 100644 mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
index edad75443645..e5c25574d4b1 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
@@ -22,7 +22,7 @@ import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute.BinaryAttribute
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.sql._
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types.{DoubleType, StructType}
@@ -33,7 +33,7 @@ import org.apache.spark.sql.types.{DoubleType, StructType}
  */
 @Experimental
 final class Binarizer(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol {
+  extends Transformer with Writable with HasInputCol with HasOutputCol {
 
   def this() = this(Identifiable.randomUID("binarizer"))
 
@@ -86,4 +86,11 @@ final class Binarizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): Binarizer = defaultCopy(extra)
+
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+object Binarizer extends Readable[Binarizer] {
+
+  override def read: Reader[Binarizer] = new DefaultParamsReader[Binarizer]
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
index 8361406f8729..c9325709187c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
@@ -592,7 +592,7 @@ trait Params extends Identifiable with Serializable {
   /**
    * Sets a parameter in the embedded param map.
    */
-  protected final def set[T](param: Param[T], value: T): this.type = {
+  final def set[T](param: Param[T], value: T): this.type = {
     set(param -> value)
   }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
new file mode 100644
index 000000000000..ea790e0dddc7
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -0,0 +1,220 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.util
+
+import java.io.IOException
+
+import org.apache.hadoop.fs.{FileSystem, Path}
+import org.json4s._
+import org.json4s.JsonDSL._
+import org.json4s.jackson.JsonMethods._
+
+import org.apache.spark.{Logging, SparkContext}
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.param.{ParamPair, Params}
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.util.Utils
+
+/**
+ * Trait for [[Writer]] and [[Reader]].
+ */
+private[util] sealed trait BaseReadWrite {
+  private var optionSQLContext: Option[SQLContext] = None
+
+  /**
+   * Sets the SQL context to use for saving/loading.
+   */
+  @Since("1.6.0")
+  def context(sqlContext: SQLContext): this.type = {
+    optionSQLContext = Option(sqlContext)
+    this
+  }
+
+  /**
+   * Returns the user-specified SQL context or the default.
+   */
+  protected final def sqlContext: SQLContext = optionSQLContext.getOrElse {
+    SQLContext.getOrCreate(SparkContext.getOrCreate())
+  }
+}
+
+/**
+ * Abstract class for utility classes that can save ML instances.
+ */
+@Experimental
+@Since("1.6.0")
+abstract class Writer extends BaseReadWrite {
+
+  protected var shouldOverwrite: Boolean = false
+
+  /**
+   * Saves the ML instances to the input path.
+   */
+  @Since("1.6.0")
+  @throws[IOException]("If the input path already exists but overwrite is not enabled.")
+  def save(path: String): Unit
+
+  /**
+   * Overwrites if the output path already exists.
+   */
+  @Since("1.6.0")
+  def overwrite(): this.type = {
+    shouldOverwrite = true
+    this
+  }
+
+  // override for Java compatibility
+  override def context(sqlContext: SQLContext): this.type = super.context(sqlContext)
+}
+
+/**
+ * Trait for classes that provide [[Writer]].
+ */
+@Since("1.6.0")
+trait Writable {
+
+  /**
+   * Returns a [[Writer]] instance for this ML instance.
+   */
+  @Since("1.6.0")
+  def write: Writer
+
+  /**
+   * Saves this ML instance to the input path, a shortcut of `write.save(path)`.
+   */
+  @Since("1.6.0")
+  @throws[IOException]("If the input path already exists but overwrite is not enabled.")
+  def save(path: String): Unit = write.save(path)
+}
+
+/**
+ * Abstract class for utility classes that can load ML instances.
+ * @tparam T ML instance type
+ */
+@Experimental
+@Since("1.6.0")
+abstract class Reader[T] extends BaseReadWrite {
+
+  /**
+   * Loads the ML component from the input path.
+   */
+  @Since("1.6.0")
+  def load(path: String): T
+
+  // override for Java compatibility
+  override def context(sqlContext: SQLContext): this.type = super.context(sqlContext)
+}
+
+/**
+ * Trait for objects that provide [[Reader]].
+ * @tparam T ML instance type
+ */
+@Experimental
+@Since("1.6.0")
+trait Readable[T] {
+
+  /**
+   * Returns a [[Reader]] instance for this class.
+   */
+  @Since("1.6.0")
+  def read: Reader[T]
+
+  /**
+   * Reads an ML instance from the input path, a shortcut of `read.load(path)`.
+   */
+  @Since("1.6.0")
+  def load(path: String): T = read.load(path)
+}
+
+/**
+ * Default [[Writer]] implementation for transformers and estimators that contain basic
+ * (json4s-serializable) params and no data. This will not handle more complex params or types with
+ * data (e.g., models with coefficients).
+ * @param instance object to save
+ */
+private[ml] class DefaultParamsWriter(instance: Params) extends Writer with Logging {
+
+  /**
+   * Saves the ML component to the input path.
+   */
+  override def save(path: String): Unit = {
+    val sc = sqlContext.sparkContext
+
+    val hadoopConf = sc.hadoopConfiguration
+    val fs = FileSystem.get(hadoopConf)
+    val p = new Path(path)
+    if (fs.exists(p)) {
+      if (shouldOverwrite) {
+        logInfo(s"Path $path already exists. It will be overwritten.")
+        // TODO: Revert back to the original content if save is not successful.
+        fs.delete(p, true)
+      } else {
+        throw new IOException(
+          s"Path $path already exists. Please use write.overwrite().save(path) to overwrite it.")
+      }
+    }
+
+    val uid = instance.uid
+    val cls = instance.getClass.getName
+    val params = instance.extractParamMap().toSeq.asInstanceOf[Seq[ParamPair[Any]]]
+    val jsonParams = params.map { case ParamPair(p, v) =>
+      p.name -> parse(p.jsonEncode(v))
+    }.toList
+    val metadata = ("class" -> cls) ~
+      ("timestamp" -> System.currentTimeMillis()) ~
+      ("uid" -> uid) ~
+      ("paramMap" -> jsonParams)
+    val metadataPath = new Path(path, "metadata").toString
+    val metadataJson = compact(render(metadata))
+    sc.parallelize(Seq(metadataJson), 1).saveAsTextFile(metadataPath)
+  }
+}
+
+/**
+ * Default [[Reader]] implementation for transformers and estimators that contain basic
+ * (json4s-serializable) params and no data. This will not handle more complex params or types with
+ * data (e.g., models with coefficients).
+ * @tparam T ML instance type
+ */
+private[ml] class DefaultParamsReader[T] extends Reader[T] {
+
+  /**
+   * Loads the ML component from the input path.
+   */
+  override def load(path: String): T = {
+    implicit val format = DefaultFormats
+    val sc = sqlContext.sparkContext
+    val metadataPath = new Path(path, "metadata").toString
+    val metadataStr = sc.textFile(metadataPath, 1).first()
+    val metadata = parse(metadataStr)
+    val cls = Utils.classForName((metadata \ "class").extract[String])
+    val uid = (metadata \ "uid").extract[String]
+    val instance = cls.getConstructor(classOf[String]).newInstance(uid).asInstanceOf[Params]
+    (metadata \ "paramMap") match {
+      case JObject(pairs) =>
+        pairs.foreach { case (paramName, jsonValue) =>
+          val param = instance.getParam(paramName)
+          val value = param.jsonDecode(compact(render(jsonValue)))
+          instance.set(param, value)
+        }
+      case _ =>
+        throw new IllegalArgumentException(s"Cannot recognize JSON metadata: $metadataStr.")
+    }
+    instance.asInstanceOf[T]
+  }
+}
diff --git a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
new file mode 100644
index 000000000000..c39538014be8
--- /dev/null
+++ b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
@@ -0,0 +1,74 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.util;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.util.Utils;
+
+public class JavaDefaultReadWriteSuite {
+
+  JavaSparkContext jsc = null;
+  File tempDir = null;
+
+  @Before
+  public void setUp() {
+    jsc = new JavaSparkContext("local[2]", "JavaDefaultReadWriteSuite");
+    tempDir = Utils.createTempDir(
+      System.getProperty("java.io.tmpdir"), "JavaDefaultReadWriteSuite");
+  }
+
+  @After
+  public void tearDown() {
+    if (jsc != null) {
+      jsc.stop();
+      jsc = null;
+    }
+    Utils.deleteRecursively(tempDir);
+  }
+
+  @Test
+  public void testDefaultReadWrite() throws IOException {
+    String uid = "my_params";
+    MyParams instance = new MyParams(uid);
+    instance.set(instance.intParam(), 2);
+    String outputPath = new File(tempDir, uid).getPath();
+    instance.save(outputPath);
+    try {
+      instance.save(outputPath);
+      Assert.fail(
+        "Write without overwrite enabled should fail if the output directory already exists.");
+    } catch (IOException e) {
+      // expected
+    }
+    SQLContext sqlContext = new SQLContext(jsc);
+    instance.write().context(sqlContext).overwrite().save(outputPath);
+    MyParams newInstance = MyParams.load(outputPath);
+    Assert.assertEquals("UID should match.", instance.uid(), newInstance.uid());
+    Assert.assertEquals("Params should be preserved.",
+      2, newInstance.getOrDefault(newInstance.intParam()));
+  }
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
index 208604398366..9dfa1439cc30 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
@@ -19,10 +19,11 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
 
-class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   @transient var data: Array[Double] = _
 
@@ -66,4 +67,12 @@ class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(x === y, "The feature value is not correct after binarization.")
     }
   }
+
+  test("read/write") {
+    val binarizer = new Binarizer()
+      .setInputCol("feature")
+      .setOutputCol("binarized_feature")
+      .setThreshold(0.1)
+    testDefaultReadWrite(binarizer)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
new file mode 100644
index 000000000000..4545b0f281f5
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.util
+
+import java.io.{File, IOException}
+
+import org.scalatest.Suite
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.param._
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+
+trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
+
+  /**
+   * Checks "overwrite" option and params.
+   * @param instance ML instance to test saving/loading
+   * @tparam T ML instance type
+   */
+  def testDefaultReadWrite[T <: Params with Writable](instance: T): Unit = {
+    val uid = instance.uid
+    val path = new File(tempDir, uid).getPath
+
+    instance.save(path)
+    intercept[IOException] {
+      instance.save(path)
+    }
+    instance.write.overwrite().save(path)
+    val loader = instance.getClass.getMethod("read").invoke(null).asInstanceOf[Reader[T]]
+    val newInstance = loader.load(path)
+
+    assert(newInstance.uid === instance.uid)
+    instance.params.foreach { p =>
+      if (instance.isDefined(p)) {
+        (instance.getOrDefault(p), newInstance.getOrDefault(p)) match {
+          case (Array(values), Array(newValues)) =>
+            assert(values === newValues, s"Values do not match on param ${p.name}.")
+          case (value, newValue) =>
+            assert(value === newValue, s"Values do not match on param ${p.name}.")
+        }
+      } else {
+        assert(!newInstance.isDefined(p), s"Param ${p.name} shouldn't be defined.")
+      }
+    }
+
+    val load = instance.getClass.getMethod("load", classOf[String])
+    val another = load.invoke(instance, path).asInstanceOf[T]
+    assert(another.uid === instance.uid)
+  }
+}
+
+class MyParams(override val uid: String) extends Params with Writable {
+
+  final val intParamWithDefault: IntParam = new IntParam(this, "intParamWithDefault", "doc")
+  final val intParam: IntParam = new IntParam(this, "intParam", "doc")
+  final val floatParam: FloatParam = new FloatParam(this, "floatParam", "doc")
+  final val doubleParam: DoubleParam = new DoubleParam(this, "doubleParam", "doc")
+  final val longParam: LongParam = new LongParam(this, "longParam", "doc")
+  final val stringParam: Param[String] = new Param[String](this, "stringParam", "doc")
+  final val intArrayParam: IntArrayParam = new IntArrayParam(this, "intArrayParam", "doc")
+  final val doubleArrayParam: DoubleArrayParam =
+    new DoubleArrayParam(this, "doubleArrayParam", "doc")
+  final val stringArrayParam: StringArrayParam =
+    new StringArrayParam(this, "stringArrayParam", "doc")
+
+  setDefault(intParamWithDefault -> 0)
+  set(intParam -> 1)
+  set(floatParam -> 2.0f)
+  set(doubleParam -> 3.0)
+  set(longParam -> 4L)
+  set(stringParam -> "5")
+  set(intArrayParam -> Array(6, 7))
+  set(doubleArrayParam -> Array(8.0, 9.0))
+  set(stringArrayParam -> Array("10", "11"))
+
+  override def copy(extra: ParamMap): Params = defaultCopy(extra)
+
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+object MyParams extends Readable[MyParams] {
+
+  override def read: Reader[MyParams] = new DefaultParamsReader[MyParams]
+
+  override def load(path: String): MyParams = read.load(path)
+}
+
+class DefaultReadWriteSuite extends SparkFunSuite with MLlibTestSparkContext
+  with DefaultReadWriteTest {
+
+  test("default read/write") {
+    val myParams = new MyParams("my_params")
+    testDefaultReadWrite(myParams)
+  }
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala b/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala
new file mode 100644
index 000000000000..2742026a69c2
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala
@@ -0,0 +1,45 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.util
+
+import java.io.File
+
+import org.scalatest.{BeforeAndAfterAll, Suite}
+
+import org.apache.spark.util.Utils
+
+/**
+ * Trait that creates a temporary directory before all tests and deletes it after all.
+ */
+trait TempDirectory extends BeforeAndAfterAll { self: Suite =>
+
+  private var _tempDir: File = _
+
+  /** Returns the temporary directory as a [[File]] instance. */
+  protected def tempDir: File = _tempDir
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+    _tempDir = Utils.createTempDir(this.getClass.getName)
+  }
+
+  override def afterAll(): Unit = {
+    Utils.deleteRecursively(_tempDir)
+    super.afterAll()
+  }
+}

From f6680cdc5d2912dea9768ef5c3e2cc101b06daf8 Mon Sep 17 00:00:00 2001
From: Thomas Graves <tgraves@staydecay.corp.gq1.yahoo.com>
Date: Fri, 6 Nov 2015 15:24:33 -0800
Subject: [PATCH 541/896] [SPARK-11555] spark on yarn spark-class --num-workers
 doesn't work

I tested the various options with both spark-submit and spark-class of specifying number of executors in both client and cluster mode where it applied.

--num-workers, --num-executors, spark.executor.instances, SPARK_EXECUTOR_INSTANCES, default nothing supplied

Author: Thomas Graves <tgraves@staydecay.corp.gq1.yahoo.com>

Closes #9523 from tgravescs/SPARK-11555.
---
 .../org/apache/spark/deploy/yarn/ClientArguments.scala     | 2 +-
 .../org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
index 1165061db21e..a9f437435735 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/ClientArguments.scala
@@ -81,7 +81,7 @@ private[spark] class ClientArguments(args: Array[String], sparkConf: SparkConf)
       .orNull
     // If dynamic allocation is enabled, start at the configured initial number of executors.
     // Default to minExecutors if no initialExecutors is set.
-    numExecutors = YarnSparkHadoopUtil.getInitialTargetExecutorNumber(sparkConf)
+    numExecutors = YarnSparkHadoopUtil.getInitialTargetExecutorNumber(sparkConf, numExecutors)
     principal = Option(principal)
       .orElse(sparkConf.getOption("spark.yarn.principal"))
       .orNull
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
index 561ad79ee022..a290ebeec900 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
@@ -392,8 +392,11 @@ object YarnSparkHadoopUtil {
   /**
    * Getting the initial target number of executors depends on whether dynamic allocation is
    * enabled.
+   * If not using dynamic allocation it gets the number of executors reqeusted by the user.
    */
-  def getInitialTargetExecutorNumber(conf: SparkConf): Int = {
+  def getInitialTargetExecutorNumber(
+      conf: SparkConf,
+      numExecutors: Int = DEFAULT_NUMBER_EXECUTORS): Int = {
     if (Utils.isDynamicAllocationEnabled(conf)) {
       val minNumExecutors = conf.getInt("spark.dynamicAllocation.minExecutors", 0)
       val initialNumExecutors =
@@ -406,7 +409,7 @@ object YarnSparkHadoopUtil {
       initialNumExecutors
     } else {
       val targetNumExecutors =
-        sys.env.get("SPARK_EXECUTOR_INSTANCES").map(_.toInt).getOrElse(DEFAULT_NUMBER_EXECUTORS)
+        sys.env.get("SPARK_EXECUTOR_INSTANCES").map(_.toInt).getOrElse(numExecutors)
       // System property can override environment variable.
       conf.getInt("spark.executor.instances", targetNumExecutors)
     }

From 7e9a9e603abce8689938bdd62d04b29299644aa4 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 6 Nov 2015 15:37:07 -0800
Subject: [PATCH 542/896] [SPARK-11269][SQL] Java API support & test cases for
 Dataset

This simply brings https://github.com/apache/spark/pull/9358 up-to-date.

Author: Wenchen Fan <wenchen@databricks.com>
Author: Reynold Xin <rxin@databricks.com>

Closes #9528 from rxin/dataset-java.
---
 .../spark/sql/catalyst/encoders/Encoder.scala | 123 +++++-
 .../sql/catalyst/expressions/objects.scala    |  21 ++
 .../scala/org/apache/spark/sql/Dataset.scala  | 126 ++++++-
 .../org/apache/spark/sql/DatasetHolder.scala  |   6 +-
 .../org/apache/spark/sql/GroupedDataset.scala |  17 +
 .../org/apache/spark/sql/SQLContext.scala     |   4 +
 .../apache/spark/sql/JavaDatasetSuite.java    | 357 ++++++++++++++++++
 .../spark/sql/DatasetPrimitiveSuite.scala     |   2 +-
 8 files changed, 644 insertions(+), 12 deletions(-)
 create mode 100644 sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index 329a132d3d8b..f05e18288de2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -17,11 +17,11 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-
-
 import scala.reflect.ClassTag
 
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.util.Utils
+import org.apache.spark.sql.types.{DataType, ObjectType, StructField, StructType}
+import org.apache.spark.sql.catalyst.expressions._
 
 /**
  * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
@@ -37,3 +37,120 @@ trait Encoder[T] extends Serializable {
   /** A ClassTag that can be used to construct and Array to contain a collection of `T`. */
   def clsTag: ClassTag[T]
 }
+
+object Encoder {
+  import scala.reflect.runtime.universe._
+
+  def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
+  def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
+  def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
+  def INT: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true)
+  def LONG: Encoder[java.lang.Long] = ExpressionEncoder(flat = true)
+  def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder(flat = true)
+  def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
+  def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
+
+  def tuple[T1, T2](enc1: Encoder[T1], enc2: Encoder[T2]): Encoder[(T1, T2)] = {
+    tuple(Seq(enc1, enc2).map(_.asInstanceOf[ExpressionEncoder[_]]))
+      .asInstanceOf[ExpressionEncoder[(T1, T2)]]
+  }
+
+  def tuple[T1, T2, T3](
+      enc1: Encoder[T1],
+      enc2: Encoder[T2],
+      enc3: Encoder[T3]): Encoder[(T1, T2, T3)] = {
+    tuple(Seq(enc1, enc2, enc3).map(_.asInstanceOf[ExpressionEncoder[_]]))
+      .asInstanceOf[ExpressionEncoder[(T1, T2, T3)]]
+  }
+
+  def tuple[T1, T2, T3, T4](
+      enc1: Encoder[T1],
+      enc2: Encoder[T2],
+      enc3: Encoder[T3],
+      enc4: Encoder[T4]): Encoder[(T1, T2, T3, T4)] = {
+    tuple(Seq(enc1, enc2, enc3, enc4).map(_.asInstanceOf[ExpressionEncoder[_]]))
+      .asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4)]]
+  }
+
+  def tuple[T1, T2, T3, T4, T5](
+      enc1: Encoder[T1],
+      enc2: Encoder[T2],
+      enc3: Encoder[T3],
+      enc4: Encoder[T4],
+      enc5: Encoder[T5]): Encoder[(T1, T2, T3, T4, T5)] = {
+    tuple(Seq(enc1, enc2, enc3, enc4, enc5).map(_.asInstanceOf[ExpressionEncoder[_]]))
+      .asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4, T5)]]
+  }
+
+  private def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
+    assert(encoders.length > 1)
+    // make sure all encoders are resolved, i.e. `Attribute` has been resolved to `BoundReference`.
+    assert(encoders.forall(_.constructExpression.find(_.isInstanceOf[Attribute]).isEmpty))
+
+    val schema = StructType(encoders.zipWithIndex.map {
+      case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
+    })
+
+    val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
+
+    val extractExpressions = encoders.map {
+      case e if e.flat => e.extractExpressions.head
+      case other => CreateStruct(other.extractExpressions)
+    }.zipWithIndex.map { case (expr, index) =>
+      expr.transformUp {
+        case BoundReference(0, t: ObjectType, _) =>
+          Invoke(
+            BoundReference(0, ObjectType(cls), true),
+            s"_${index + 1}",
+            t)
+      }
+    }
+
+    val constructExpressions = encoders.zipWithIndex.map { case (enc, index) =>
+      if (enc.flat) {
+        enc.constructExpression.transform {
+          case b: BoundReference => b.copy(ordinal = index)
+        }
+      } else {
+        enc.constructExpression.transformUp {
+          case BoundReference(ordinal, dt, _) =>
+            GetInternalRowField(BoundReference(index, enc.schema, true), ordinal, dt)
+        }
+      }
+    }
+
+    val constructExpression =
+      NewInstance(cls, constructExpressions, false, ObjectType(cls))
+
+    new ExpressionEncoder[Any](
+      schema,
+      false,
+      extractExpressions,
+      constructExpression,
+      ClassTag.apply(cls))
+  }
+
+
+  def typeTagOfTuple2[T1 : TypeTag, T2 : TypeTag]: TypeTag[(T1, T2)] = typeTag[(T1, T2)]
+
+  private def getTypeTag[T](c: Class[T]): TypeTag[T] = {
+    import scala.reflect.api
+
+    // val mirror = runtimeMirror(c.getClassLoader)
+    val mirror = rootMirror
+    val sym = mirror.staticClass(c.getName)
+    val tpe = sym.selfType
+    TypeTag(mirror, new api.TypeCreator {
+      def apply[U <: api.Universe with Singleton](m: api.Mirror[U]) =
+        if (m eq mirror) tpe.asInstanceOf[U # Type]
+        else throw new IllegalArgumentException(
+          s"Type tag defined in $mirror cannot be migrated to other mirrors.")
+    })
+  }
+
+  def forTuple2[T1, T2](c1: Class[T1], c2: Class[T2]): Encoder[(T1, T2)] = {
+    implicit val typeTag1 = getTypeTag(c1)
+    implicit val typeTag2 = getTypeTag(c2)
+    ExpressionEncoder[(T1, T2)]()
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 81855289762c..4f58464221b4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -491,3 +491,24 @@ case class CreateExternalRow(children: Seq[Expression]) extends Expression {
       s"final ${classOf[Row].getName} ${ev.value} = new $rowClass($values);"
   }
 }
+
+case class GetInternalRowField(child: Expression, ordinal: Int, dataType: DataType)
+  extends UnaryExpression {
+
+  override def nullable: Boolean = true
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val row = child.gen(ctx)
+    s"""
+      ${row.code}
+      final boolean ${ev.isNull} = ${row.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      if (!${ev.isNull}) {
+        ${ev.value} = ${ctx.getValue(row.value, dataType, ordinal.toString)};
+      }
+    """
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 4bca9c3b3fe5..fecbdac9a600 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -17,9 +17,13 @@
 
 package org.apache.spark.sql
 
+import scala.collection.JavaConverters._
+
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
+import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2, _}
+
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.Inner
@@ -151,18 +155,37 @@ class Dataset[T] private[sql](
   def transform[U](t: Dataset[T] => Dataset[U]): Dataset[U] = t(this)
 
   /**
+   * (Scala-specific)
    * Returns a new [[Dataset]] that only contains elements where `func` returns `true`.
    * @since 1.6.0
    */
   def filter(func: T => Boolean): Dataset[T] = mapPartitions(_.filter(func))
 
   /**
+   * (Java-specific)
+   * Returns a new [[Dataset]] that only contains elements where `func` returns `true`.
+   * @since 1.6.0
+   */
+  def filter(func: JFunction[T, java.lang.Boolean]): Dataset[T] =
+    filter(t => func.call(t).booleanValue())
+
+  /**
+   * (Scala-specific)
    * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
    * @since 1.6.0
    */
   def map[U : Encoder](func: T => U): Dataset[U] = mapPartitions(_.map(func))
 
   /**
+   * (Java-specific)
+   * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
+   * @since 1.6.0
+   */
+  def map[U](func: JFunction[T, U], encoder: Encoder[U]): Dataset[U] =
+    map(t => func.call(t))(encoder)
+
+  /**
+   * (Scala-specific)
    * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
    * @since 1.6.0
    */
@@ -177,30 +200,77 @@ class Dataset[T] private[sql](
         logicalPlan))
   }
 
+  /**
+   * (Java-specific)
+   * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
+   * @since 1.6.0
+   */
+  def mapPartitions[U](
+      f: FlatMapFunction[java.util.Iterator[T], U],
+      encoder: Encoder[U]): Dataset[U] = {
+    val func: (Iterator[T]) => Iterator[U] = x => f.call(x.asJava).iterator().asScala
+    mapPartitions(func)(encoder)
+  }
+
+  /**
+   * (Scala-specific)
+   * Returns a new [[Dataset]] by first applying a function to all elements of this [[Dataset]],
+   * and then flattening the results.
+   * @since 1.6.0
+   */
   def flatMap[U : Encoder](func: T => TraversableOnce[U]): Dataset[U] =
     mapPartitions(_.flatMap(func))
 
+  /**
+   * (Java-specific)
+   * Returns a new [[Dataset]] by first applying a function to all elements of this [[Dataset]],
+   * and then flattening the results.
+   * @since 1.6.0
+   */
+  def flatMap[U](f: FlatMapFunction[T, U], encoder: Encoder[U]): Dataset[U] = {
+    val func: (T) => Iterable[U] = x => f.call(x).asScala
+    flatMap(func)(encoder)
+  }
+
   /* ************** *
    *  Side effects  *
    * ************** */
 
   /**
+   * (Scala-specific)
    * Runs `func` on each element of this Dataset.
    * @since 1.6.0
    */
   def foreach(func: T => Unit): Unit = rdd.foreach(func)
 
   /**
+   * (Java-specific)
+   * Runs `func` on each element of this Dataset.
+   * @since 1.6.0
+   */
+  def foreach(func: VoidFunction[T]): Unit = foreach(func.call(_))
+
+  /**
+   * (Scala-specific)
    * Runs `func` on each partition of this Dataset.
    * @since 1.6.0
    */
   def foreachPartition(func: Iterator[T] => Unit): Unit = rdd.foreachPartition(func)
 
+  /**
+   * (Java-specific)
+   * Runs `func` on each partition of this Dataset.
+   * @since 1.6.0
+   */
+  def foreachPartition(func: VoidFunction[java.util.Iterator[T]]): Unit =
+    foreachPartition(it => func.call(it.asJava))
+
   /* ************* *
    *  Aggregation  *
    * ************* */
 
   /**
+   * (Scala-specific)
    * Reduces the elements of this Dataset using the specified  binary function.  The given function
    * must be commutative and associative or the result may be non-deterministic.
    * @since 1.6.0
@@ -208,6 +278,15 @@ class Dataset[T] private[sql](
   def reduce(func: (T, T) => T): T = rdd.reduce(func)
 
   /**
+   * (Java-specific)
+   * Reduces the elements of this Dataset using the specified  binary function.  The given function
+   * must be commutative and associative or the result may be non-deterministic.
+   * @since 1.6.0
+   */
+  def reduce(func: JFunction2[T, T, T]): T = reduce(func.call(_, _))
+
+  /**
+   * (Scala-specific)
    * Aggregates the elements of each partition, and then the results for all the partitions, using a
    * given associative and commutative function and a neutral "zero value".
    *
@@ -221,6 +300,15 @@ class Dataset[T] private[sql](
   def fold(zeroValue: T)(op: (T, T) => T): T = rdd.fold(zeroValue)(op)
 
   /**
+   * (Java-specific)
+   * Aggregates the elements of each partition, and then the results for all the partitions, using a
+   * given associative and commutative function and a neutral "zero value".
+   * @since 1.6.0
+   */
+  def fold(zeroValue: T, func: JFunction2[T, T, T]): T = fold(zeroValue)(func.call(_, _))
+
+  /**
+   * (Scala-specific)
    * Returns a [[GroupedDataset]] where the data is grouped by the given key function.
    * @since 1.6.0
    */
@@ -258,6 +346,14 @@ class Dataset[T] private[sql](
       keyAttributes)
   }
 
+  /**
+   * (Java-specific)
+   * Returns a [[GroupedDataset]] where the data is grouped by the given key function.
+   * @since 1.6.0
+   */
+  def groupBy[K](f: JFunction[T, K], encoder: Encoder[K]): GroupedDataset[K, T] =
+    groupBy(f.call(_))(encoder)
+
   /* ****************** *
    *  Typed Relational  *
    * ****************** */
@@ -267,8 +363,7 @@ class Dataset[T] private[sql](
    * {{{
    *   df.select($"colA", $"colB" + 1)
    * }}}
-   * @group dfops
-   * @since 1.3.0
+   * @since 1.6.0
    */
   // Copied from Dataframe to make sure we don't have invalid overloads.
   @scala.annotation.varargs
@@ -279,7 +374,7 @@ class Dataset[T] private[sql](
    *
    * {{{
    *   val ds = Seq(1, 2, 3).toDS()
-   *   val newDS = ds.select(e[Int]("value + 1"))
+   *   val newDS = ds.select(expr("value + 1").as[Int])
    * }}}
    * @since 1.6.0
    */
@@ -405,6 +500,8 @@ class Dataset[T] private[sql](
    * This type of join can be useful both for preserving type-safety with the original object
    * types as well as working with relational data where either side of the join has column
    * names in common.
+   *
+   * @since 1.6.0
    */
   def joinWith[U](other: Dataset[U], condition: Column): Dataset[(T, U)] = {
     val left = this.logicalPlan
@@ -438,12 +535,31 @@ class Dataset[T] private[sql](
    *  Gather to Driver Actions  *
    * ************************** */
 
-  /** Returns the first element in this [[Dataset]]. */
+  /**
+   * Returns the first element in this [[Dataset]].
+   * @since 1.6.0
+   */
   def first(): T = rdd.first()
 
-  /** Collects the elements to an Array. */
+  /**
+   * Collects the elements to an Array.
+   * @since 1.6.0
+   */
   def collect(): Array[T] = rdd.collect()
 
+  /**
+   * (Java-specific)
+   * Collects the elements to a Java list.
+   *
+   * Due to the incompatibility problem between Scala and Java, the return type of [[collect()]] at
+   * Java side is `java.lang.Object`, which is not easy to use.  Java user can use this method
+   * instead and keep the generic type for result.
+   *
+   * @since 1.6.0
+   */
+  def collectAsList(): java.util.List[T] =
+    rdd.collect().toSeq.asJava
+
   /** Returns the first `num` elements of this [[Dataset]] as an Array. */
   def take(num: Int): Array[T] = rdd.take(num)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
index 45f0098b9288..08097e9f0208 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DatasetHolder.scala
@@ -27,9 +27,9 @@ package org.apache.spark.sql
  *
  * @since 1.6.0
  */
-case class DatasetHolder[T] private[sql](private val df: Dataset[T]) {
+case class DatasetHolder[T] private[sql](private val ds: Dataset[T]) {
 
   // This is declared with parentheses to prevent the Scala compiler from treating
-  // `rdd.toDF("1")` as invoking this toDF and then apply on the returned DataFrame.
-  def toDS(): Dataset[T] = df
+  // `rdd.toDS("1")` as invoking this toDS and then apply on the returned Dataset.
+  def toDS(): Dataset[T] = ds
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index b8fc373dffcf..b2803d5a9a1e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -17,7 +17,11 @@
 
 package org.apache.spark.sql
 
+import java.util.{Iterator => JIterator}
+import scala.collection.JavaConverters._
+
 import org.apache.spark.annotation.Experimental
+import org.apache.spark.api.java.function.{Function2 => JFunction2, Function3 => JFunction3, _}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, Alias, Attribute}
@@ -104,6 +108,12 @@ class GroupedDataset[K, T] private[sql](
       MapGroups(f, groupingAttributes, logicalPlan))
   }
 
+  def mapGroups[U](
+      f: JFunction2[K, JIterator[T], JIterator[U]],
+      encoder: Encoder[U]): Dataset[U] = {
+    mapGroups((key, data) => f.call(key, data.asJava).asScala)(encoder)
+  }
+
   // To ensure valid overloading.
   protected def agg(expr: Column, exprs: Column*): DataFrame =
     groupedData.agg(expr, exprs: _*)
@@ -196,4 +206,11 @@ class GroupedDataset[K, T] private[sql](
         this.logicalPlan,
         other.logicalPlan))
   }
+
+  def cogroup[U, R](
+      other: GroupedDataset[K, U],
+      f: JFunction3[K, JIterator[T], JIterator[U], JIterator[R]],
+      encoder: Encoder[R]): Dataset[R] = {
+    cogroup(other)((key, left, right) => f.call(key, left.asJava, right.asJava).asScala)(encoder)
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 5ad3871093fc..5598731af5fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -508,6 +508,10 @@ class SQLContext private[sql](
     new Dataset[T](this, plan)
   }
 
+  def createDataset[T : Encoder](data: java.util.List[T]): Dataset[T] = {
+    createDataset(data.asScala)
+  }
+
   /**
    * Creates a DataFrame from an RDD[Row]. User can specify whether the input rows should be
    * converted to Catalyst rows.
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
new file mode 100644
index 000000000000..a9493d576d17
--- /dev/null
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -0,0 +1,357 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package test.org.apache.spark.sql;
+
+import java.io.Serializable;
+import java.util.*;
+
+import scala.Tuple2;
+import scala.Tuple3;
+import scala.Tuple4;
+import scala.Tuple5;
+import org.junit.*;
+
+import org.apache.spark.Accumulator;
+import org.apache.spark.SparkContext;
+import org.apache.spark.api.java.function.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.sql.catalyst.encoders.Encoder;
+import org.apache.spark.sql.catalyst.encoders.Encoder$;
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.GroupedDataset;
+import org.apache.spark.sql.test.TestSQLContext;
+
+import static org.apache.spark.sql.functions.*;
+
+public class JavaDatasetSuite implements Serializable {
+  private transient JavaSparkContext jsc;
+  private transient TestSQLContext context;
+  private transient Encoder$ e = Encoder$.MODULE$;
+
+  @Before
+  public void setUp() {
+    // Trigger static initializer of TestData
+    SparkContext sc = new SparkContext("local[*]", "testing");
+    jsc = new JavaSparkContext(sc);
+    context = new TestSQLContext(sc);
+    context.loadTestData();
+  }
+
+  @After
+  public void tearDown() {
+    context.sparkContext().stop();
+    context = null;
+    jsc = null;
+  }
+
+  private <T1, T2> Tuple2<T1, T2> tuple2(T1 t1, T2 t2) {
+    return new Tuple2<T1, T2>(t1, t2);
+  }
+
+  @Test
+  public void testCollect() {
+    List<String> data = Arrays.asList("hello", "world");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+    String[] collected = (String[]) ds.collect();
+    Assert.assertEquals(Arrays.asList("hello", "world"), Arrays.asList(collected));
+  }
+
+  @Test
+  public void testCommonOperation() {
+    List<String> data = Arrays.asList("hello", "world");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Assert.assertEquals("hello", ds.first());
+
+    Dataset<String> filtered = ds.filter(new Function<String, Boolean>() {
+      @Override
+      public Boolean call(String v) throws Exception {
+        return v.startsWith("h");
+      }
+    });
+    Assert.assertEquals(Arrays.asList("hello"), filtered.collectAsList());
+
+
+    Dataset<Integer> mapped = ds.map(new Function<String, Integer>() {
+      @Override
+      public Integer call(String v) throws Exception {
+        return v.length();
+      }
+    }, e.INT());
+    Assert.assertEquals(Arrays.asList(5, 5), mapped.collectAsList());
+
+    Dataset<String> parMapped = ds.mapPartitions(new FlatMapFunction<Iterator<String>, String>() {
+      @Override
+      public Iterable<String> call(Iterator<String> it) throws Exception {
+        List<String> ls = new LinkedList<String>();
+        while (it.hasNext()) {
+          ls.add(it.next().toUpperCase());
+        }
+        return ls;
+      }
+    }, e.STRING());
+    Assert.assertEquals(Arrays.asList("HELLO", "WORLD"), parMapped.collectAsList());
+
+    Dataset<String> flatMapped = ds.flatMap(new FlatMapFunction<String, String>() {
+      @Override
+      public Iterable<String> call(String s) throws Exception {
+        List<String> ls = new LinkedList<String>();
+        for (char c : s.toCharArray()) {
+          ls.add(String.valueOf(c));
+        }
+        return ls;
+      }
+    }, e.STRING());
+    Assert.assertEquals(
+      Arrays.asList("h", "e", "l", "l", "o", "w", "o", "r", "l", "d"),
+      flatMapped.collectAsList());
+  }
+
+  @Test
+  public void testForeach() {
+    final Accumulator<Integer> accum = jsc.accumulator(0);
+    List<String> data = Arrays.asList("a", "b", "c");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+
+    ds.foreach(new VoidFunction<String>() {
+      @Override
+      public void call(String s) throws Exception {
+        accum.add(1);
+      }
+    });
+    Assert.assertEquals(3, accum.value().intValue());
+  }
+
+  @Test
+  public void testReduce() {
+    List<Integer> data = Arrays.asList(1, 2, 3);
+    Dataset<Integer> ds = context.createDataset(data, e.INT());
+
+    int reduced = ds.reduce(new Function2<Integer, Integer, Integer>() {
+      @Override
+      public Integer call(Integer v1, Integer v2) throws Exception {
+        return v1 + v2;
+      }
+    });
+    Assert.assertEquals(6, reduced);
+
+    int folded = ds.fold(1, new Function2<Integer, Integer, Integer>() {
+      @Override
+      public Integer call(Integer v1, Integer v2) throws Exception {
+        return v1 * v2;
+      }
+    });
+    Assert.assertEquals(6, folded);
+  }
+
+  @Test
+  public void testGroupBy() {
+    List<String> data = Arrays.asList("a", "foo", "bar");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+    GroupedDataset<Integer, String> grouped = ds.groupBy(new Function<String, Integer>() {
+      @Override
+      public Integer call(String v) throws Exception {
+        return v.length();
+      }
+    }, e.INT());
+
+    Dataset<String> mapped = grouped.mapGroups(
+      new Function2<Integer, Iterator<String>, Iterator<String>>() {
+        @Override
+        public Iterator<String> call(Integer key, Iterator<String> data) throws Exception {
+          StringBuilder sb = new StringBuilder(key.toString());
+          while (data.hasNext()) {
+            sb.append(data.next());
+          }
+          return Collections.singletonList(sb.toString()).iterator();
+        }
+      },
+      e.STRING());
+
+    Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
+
+    List<Integer> data2 = Arrays.asList(2, 6, 10);
+    Dataset<Integer> ds2 = context.createDataset(data2, e.INT());
+    GroupedDataset<Integer, Integer> grouped2 = ds2.groupBy(new Function<Integer, Integer>() {
+      @Override
+      public Integer call(Integer v) throws Exception {
+        return v / 2;
+      }
+    }, e.INT());
+
+    Dataset<String> cogrouped = grouped.cogroup(
+      grouped2,
+      new Function3<Integer, Iterator<String>, Iterator<Integer>, Iterator<String>>() {
+        @Override
+        public Iterator<String> call(
+            Integer key,
+            Iterator<String> left,
+            Iterator<Integer> right) throws Exception {
+          StringBuilder sb = new StringBuilder(key.toString());
+          while (left.hasNext()) {
+            sb.append(left.next());
+          }
+          sb.append("#");
+          while (right.hasNext()) {
+            sb.append(right.next());
+          }
+          return Collections.singletonList(sb.toString()).iterator();
+        }
+      },
+      e.STRING());
+
+    Assert.assertEquals(Arrays.asList("1a#2", "3foobar#6", "5#10"), cogrouped.collectAsList());
+  }
+
+  @Test
+  public void testGroupByColumn() {
+    List<String> data = Arrays.asList("a", "foo", "bar");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+    GroupedDataset<Integer, String> grouped = ds.groupBy(length(col("value"))).asKey(e.INT());
+
+    Dataset<String> mapped = grouped.mapGroups(
+      new Function2<Integer, Iterator<String>, Iterator<String>>() {
+        @Override
+        public Iterator<String> call(Integer key, Iterator<String> data) throws Exception {
+          StringBuilder sb = new StringBuilder(key.toString());
+          while (data.hasNext()) {
+            sb.append(data.next());
+          }
+          return Collections.singletonList(sb.toString()).iterator();
+        }
+      },
+      e.STRING());
+
+    Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
+  }
+
+  @Test
+  public void testSelect() {
+    List<Integer> data = Arrays.asList(2, 6);
+    Dataset<Integer> ds = context.createDataset(data, e.INT());
+
+    Dataset<Tuple2<Integer, String>> selected = ds.select(
+      expr("value + 1").as(e.INT()),
+      col("value").cast("string").as(e.STRING()));
+
+    Assert.assertEquals(
+      Arrays.asList(tuple2(3, "2"), tuple2(7, "6")),
+      selected.collectAsList());
+  }
+
+  @Test
+  public void testSetOperation() {
+    List<String> data = Arrays.asList("abc", "abc", "xyz");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+
+    Assert.assertEquals(
+      Arrays.asList("abc", "xyz"),
+      sort(ds.distinct().collectAsList().toArray(new String[0])));
+
+    List<String> data2 = Arrays.asList("xyz", "foo", "foo");
+    Dataset<String> ds2 = context.createDataset(data2, e.STRING());
+
+    Dataset<String> intersected = ds.intersect(ds2);
+    Assert.assertEquals(Arrays.asList("xyz"), intersected.collectAsList());
+
+    Dataset<String> unioned = ds.union(ds2);
+    Assert.assertEquals(
+      Arrays.asList("abc", "abc", "foo", "foo", "xyz", "xyz"),
+      sort(unioned.collectAsList().toArray(new String[0])));
+
+    Dataset<String> subtracted = ds.subtract(ds2);
+    Assert.assertEquals(Arrays.asList("abc", "abc"), subtracted.collectAsList());
+  }
+
+  private <T extends Comparable<T>> List<T> sort(T[] data) {
+    Arrays.sort(data);
+    return Arrays.asList(data);
+  }
+
+  @Test
+  public void testJoin() {
+    List<Integer> data = Arrays.asList(1, 2, 3);
+    Dataset<Integer> ds = context.createDataset(data, e.INT()).as("a");
+    List<Integer> data2 = Arrays.asList(2, 3, 4);
+    Dataset<Integer> ds2 = context.createDataset(data2, e.INT()).as("b");
+
+    Dataset<Tuple2<Integer, Integer>> joined =
+      ds.joinWith(ds2, col("a.value").equalTo(col("b.value")));
+    Assert.assertEquals(
+      Arrays.asList(tuple2(2, 2), tuple2(3, 3)),
+      joined.collectAsList());
+  }
+
+  @Test
+  public void testTupleEncoder() {
+    Encoder<Tuple2<Integer, String>> encoder2 = e.tuple(e.INT(), e.STRING());
+    List<Tuple2<Integer, String>> data2 = Arrays.asList(tuple2(1, "a"), tuple2(2, "b"));
+    Dataset<Tuple2<Integer, String>> ds2 = context.createDataset(data2, encoder2);
+    Assert.assertEquals(data2, ds2.collectAsList());
+
+    Encoder<Tuple3<Integer, Long, String>> encoder3 = e.tuple(e.INT(), e.LONG(), e.STRING());
+    List<Tuple3<Integer, Long, String>> data3 =
+      Arrays.asList(new Tuple3<Integer, Long, String>(1, 2L, "a"));
+    Dataset<Tuple3<Integer, Long, String>> ds3 = context.createDataset(data3, encoder3);
+    Assert.assertEquals(data3, ds3.collectAsList());
+
+    Encoder<Tuple4<Integer, String, Long, String>> encoder4 =
+      e.tuple(e.INT(), e.STRING(), e.LONG(), e.STRING());
+    List<Tuple4<Integer, String, Long, String>> data4 =
+      Arrays.asList(new Tuple4<Integer, String, Long, String>(1, "b", 2L, "a"));
+    Dataset<Tuple4<Integer, String, Long, String>> ds4 = context.createDataset(data4, encoder4);
+    Assert.assertEquals(data4, ds4.collectAsList());
+
+    Encoder<Tuple5<Integer, String, Long, String, Boolean>> encoder5 =
+      e.tuple(e.INT(), e.STRING(), e.LONG(), e.STRING(), e.BOOLEAN());
+    List<Tuple5<Integer, String, Long, String, Boolean>> data5 =
+      Arrays.asList(new Tuple5<Integer, String, Long, String, Boolean>(1, "b", 2L, "a", true));
+    Dataset<Tuple5<Integer, String, Long, String, Boolean>> ds5 =
+      context.createDataset(data5, encoder5);
+    Assert.assertEquals(data5, ds5.collectAsList());
+  }
+
+  @Test
+  public void testNestedTupleEncoder() {
+    // test ((int, string), string)
+    Encoder<Tuple2<Tuple2<Integer, String>, String>> encoder =
+      e.tuple(e.tuple(e.INT(), e.STRING()), e.STRING());
+    List<Tuple2<Tuple2<Integer, String>, String>> data =
+      Arrays.asList(tuple2(tuple2(1, "a"), "a"), tuple2(tuple2(2, "b"), "b"));
+    Dataset<Tuple2<Tuple2<Integer, String>, String>> ds = context.createDataset(data, encoder);
+    Assert.assertEquals(data, ds.collectAsList());
+
+    // test (int, (string, string, long))
+    Encoder<Tuple2<Integer, Tuple3<String, String, Long>>> encoder2 =
+      e.tuple(e.INT(), e.tuple(e.STRING(), e.STRING(), e.LONG()));
+    List<Tuple2<Integer, Tuple3<String, String, Long>>> data2 =
+      Arrays.asList(tuple2(1, new Tuple3<String, String, Long>("a", "b", 3L)));
+    Dataset<Tuple2<Integer, Tuple3<String, String, Long>>> ds2 =
+      context.createDataset(data2, encoder2);
+    Assert.assertEquals(data2, ds2.collectAsList());
+
+    // test (int, ((string, long), string))
+    Encoder<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> encoder3 =
+      e.tuple(e.INT(), e.tuple(e.tuple(e.STRING(), e.LONG()), e.STRING()));
+    List<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> data3 =
+      Arrays.asList(tuple2(1, tuple2(tuple2("a", 2L), "b")));
+    Dataset<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> ds3 =
+      context.createDataset(data3, encoder3);
+    Assert.assertEquals(data3, ds3.collectAsList());
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
index 32443557fb8e..e3b0346f857d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -59,7 +59,7 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
   test("foreach") {
     val ds = Seq(1, 2, 3).toDS()
     val acc = sparkContext.accumulator(0)
-    ds.foreach(acc +=)
+    ds.foreach(acc += _)
     assert(acc.value == 6)
   }
 

From 1ab72b08601a1c8a674bdd3fab84d9804899b2c7 Mon Sep 17 00:00:00 2001
From: Nong Li <nong@databricks.com>
Date: Fri, 6 Nov 2015 15:48:20 -0800
Subject: [PATCH 543/896] =?UTF-8?q?[SPARK-11410]=20[PYSPARK]=20Add=20pytho?=
 =?UTF-8?q?n=20bindings=20for=20repartition=20and=20sortW=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…ithinPartitions.

Author: Nong Li <nong@databricks.com>

Closes #9504 from nongli/spark-11410.
---
 python/pyspark/sql/dataframe.py | 117 +++++++++++++++++++++++++++-----
 1 file changed, 101 insertions(+), 16 deletions(-)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 765a4511b64b..b97c94dad834 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -422,6 +422,67 @@ def repartition(self, numPartitions):
         """
         return DataFrame(self._jdf.repartition(numPartitions), self.sql_ctx)
 
+    @since(1.3)
+    def repartition(self, numPartitions, *cols):
+        """
+        Returns a new :class:`DataFrame` partitioned by the given partitioning expressions. The
+        resulting DataFrame is hash partitioned.
+
+        ``numPartitions`` can be an int to specify the target number of partitions or a Column.
+        If it is a Column, it will be used as the first partitioning column. If not specified,
+        the default number of partitions is used.
+
+        .. versionchanged:: 1.6
+           Added optional arguments to specify the partitioning columns. Also made numPartitions
+           optional if partitioning columns are specified.
+
+        >>> df.repartition(10).rdd.getNumPartitions()
+        10
+        >>> data = df.unionAll(df).repartition("age")
+        >>> data.show()
+        +---+-----+
+        |age| name|
+        +---+-----+
+        |  2|Alice|
+        |  2|Alice|
+        |  5|  Bob|
+        |  5|  Bob|
+        +---+-----+
+        >>> data = data.repartition(7, "age")
+        >>> data.show()
+        +---+-----+
+        |age| name|
+        +---+-----+
+        |  5|  Bob|
+        |  5|  Bob|
+        |  2|Alice|
+        |  2|Alice|
+        +---+-----+
+        >>> data.rdd.getNumPartitions()
+        7
+        >>> data = data.repartition("name", "age")
+        >>> data.show()
+        +---+-----+
+        |age| name|
+        +---+-----+
+        |  5|  Bob|
+        |  5|  Bob|
+        |  2|Alice|
+        |  2|Alice|
+        +---+-----+
+        """
+        if isinstance(numPartitions, int):
+            if len(cols) == 0:
+                return DataFrame(self._jdf.repartition(numPartitions), self.sql_ctx)
+            else:
+                return DataFrame(
+                    self._jdf.repartition(numPartitions, self._jcols(*cols)), self.sql_ctx)
+        elif isinstance(numPartitions, (basestring, Column)):
+            cols = (numPartitions, ) + cols
+            return DataFrame(self._jdf.repartition(self._jcols(*cols)), self.sql_ctx)
+        else:
+            raise TypeError("numPartitions should be an int or Column")
+
     @since(1.3)
     def distinct(self):
         """Returns a new :class:`DataFrame` containing the distinct rows in this :class:`DataFrame`.
@@ -589,6 +650,26 @@ def join(self, other, on=None, how=None):
                 jdf = self._jdf.join(other._jdf, on._jc, how)
         return DataFrame(jdf, self.sql_ctx)
 
+    @since(1.6)
+    def sortWithinPartitions(self, *cols, **kwargs):
+        """Returns a new :class:`DataFrame` with each partition sorted by the specified column(s).
+
+        :param cols: list of :class:`Column` or column names to sort by.
+        :param ascending: boolean or list of boolean (default True).
+            Sort ascending vs. descending. Specify list for multiple sort orders.
+            If a list is specified, length of the list must equal length of the `cols`.
+
+        >>> df.sortWithinPartitions("age", ascending=False).show()
+        +---+-----+
+        |age| name|
+        +---+-----+
+        |  2|Alice|
+        |  5|  Bob|
+        +---+-----+
+        """
+        jdf = self._jdf.sortWithinPartitions(self._sort_cols(cols, kwargs))
+        return DataFrame(jdf, self.sql_ctx)
+
     @ignore_unicode_prefix
     @since(1.3)
     def sort(self, *cols, **kwargs):
@@ -613,22 +694,7 @@ def sort(self, *cols, **kwargs):
         >>> df.orderBy(["age", "name"], ascending=[0, 1]).collect()
         [Row(age=5, name=u'Bob'), Row(age=2, name=u'Alice')]
         """
-        if not cols:
-            raise ValueError("should sort by at least one column")
-        if len(cols) == 1 and isinstance(cols[0], list):
-            cols = cols[0]
-        jcols = [_to_java_column(c) for c in cols]
-        ascending = kwargs.get('ascending', True)
-        if isinstance(ascending, (bool, int)):
-            if not ascending:
-                jcols = [jc.desc() for jc in jcols]
-        elif isinstance(ascending, list):
-            jcols = [jc if asc else jc.desc()
-                     for asc, jc in zip(ascending, jcols)]
-        else:
-            raise TypeError("ascending can only be boolean or list, but got %s" % type(ascending))
-
-        jdf = self._jdf.sort(self._jseq(jcols))
+        jdf = self._jdf.sort(self._sort_cols(cols, kwargs))
         return DataFrame(jdf, self.sql_ctx)
 
     orderBy = sort
@@ -650,6 +716,25 @@ def _jcols(self, *cols):
             cols = cols[0]
         return self._jseq(cols, _to_java_column)
 
+    def _sort_cols(self, cols, kwargs):
+        """ Return a JVM Seq of Columns that describes the sort order
+        """
+        if not cols:
+            raise ValueError("should sort by at least one column")
+        if len(cols) == 1 and isinstance(cols[0], list):
+            cols = cols[0]
+        jcols = [_to_java_column(c) for c in cols]
+        ascending = kwargs.get('ascending', True)
+        if isinstance(ascending, (bool, int)):
+            if not ascending:
+                jcols = [jc.desc() for jc in jcols]
+        elif isinstance(ascending, list):
+            jcols = [jc if asc else jc.desc()
+                     for asc, jc in zip(ascending, jcols)]
+        else:
+            raise TypeError("ascending can only be boolean or list, but got %s" % type(ascending))
+        return self._jseq(jcols)
+
     @since("1.3.1")
     def describe(self, *cols):
         """Computes statistics for numeric columns.

From 6d0ead322e72303c6444c6ac641378a4690cde96 Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Fri, 6 Nov 2015 16:04:20 -0800
Subject: [PATCH 544/896] [SPARK-9241][SQL] Supporting multiple DISTINCT
 columns (2) - Rewriting Rule

The second PR for SPARK-9241, this adds support for multiple distinct columns to the new aggregation code path.

This PR solves the multiple DISTINCT column problem by rewriting these Aggregates into an Expand-Aggregate-Aggregate combination. See the [JIRA ticket](https://issues.apache.org/jira/browse/SPARK-9241) for some information on this. The advantages over the - competing - [first PR](https://github.com/apache/spark/pull/9280) are:
- This can use the faster TungstenAggregate code path.
- It is impossible to OOM due to an ```OpenHashSet``` allocating to much memory. However, this will multiply the number of input rows by the number of distinct clauses (plus one), and puts a lot more memory pressure on the aggregation code path itself.

The location of this Rule is a bit funny, and should probably change when the old aggregation path is changed.

cc yhuai - Could you also tell me where to add tests for this?

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9406 from hvanhovell/SPARK-9241-rewriter.
---
 .../expressions/aggregate/Count.scala         |   2 +
 .../expressions/aggregate/Utils.scala         | 186 +++++++++++++++++-
 .../expressions/aggregate/interfaces.scala    |   6 +
 .../sql/catalyst/optimizer/Optimizer.scala    |   6 +-
 .../plans/logical/basicOperators.scala        |  80 ++++----
 .../spark/sql/execution/SparkStrategies.scala |   2 +-
 6 files changed, 238 insertions(+), 44 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
index 54df96cd2446..ec0c8b483a90 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
@@ -49,4 +49,6 @@ case class Count(child: Expression) extends DeclarativeAggregate {
   )
 
   override val evaluateExpression = Cast(count, LongType)
+
+  override def defaultResult: Option[Literal] = Option(Literal(0L))
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
index 644c6211d5f3..39010c3be6d4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
@@ -20,8 +20,9 @@ package org.apache.spark.sql.catalyst.expressions.aggregate
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst._
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans.logical.{Aggregate, LogicalPlan}
-import org.apache.spark.sql.types.{StructType, MapType, ArrayType}
+import org.apache.spark.sql.catalyst.plans.logical.{Expand, Aggregate, LogicalPlan}
+import org.apache.spark.sql.catalyst.rules.Rule
+import org.apache.spark.sql.types.{IntegerType, StructType, MapType, ArrayType}
 
 /**
  * Utility functions used by the query planner to convert our plan to new aggregation code path.
@@ -41,7 +42,7 @@ object Utils {
 
   private def doConvert(plan: LogicalPlan): Option[Aggregate] = plan match {
     case p: Aggregate if supportsGroupingKeySchema(p) =>
-      val converted = p.transformExpressionsDown {
+      val converted = MultipleDistinctRewriter.rewrite(p.transformExpressionsDown {
         case expressions.Average(child) =>
           aggregate.AggregateExpression2(
             aggregateFunction = aggregate.Average(child),
@@ -144,7 +145,8 @@ object Utils {
             aggregateFunction = aggregate.VarianceSamp(child),
             mode = aggregate.Complete,
             isDistinct = false)
-      }
+      })
+
       // Check if there is any expressions.AggregateExpression1 left.
       // If so, we cannot convert this plan.
       val hasAggregateExpression1 = converted.aggregateExpressions.exists { expr =>
@@ -156,6 +158,7 @@ object Utils {
       }
 
       // Check if there are multiple distinct columns.
+      // TODO remove this.
       val aggregateExpressions = converted.aggregateExpressions.flatMap { expr =>
         expr.collect {
           case agg: AggregateExpression2 => agg
@@ -213,3 +216,178 @@ object Utils {
     case other => None
   }
 }
+
+/**
+ * This rule rewrites an aggregate query with multiple distinct clauses into an expanded double
+ * aggregation in which the regular aggregation expressions and every distinct clause is aggregated
+ * in a separate group. The results are then combined in a second aggregate.
+ *
+ * TODO Expression cannocalization
+ * TODO Eliminate foldable expressions from distinct clauses.
+ * TODO This eliminates all distinct expressions. We could safely pass one to the aggregate
+ *      operator. Perhaps this is a good thing? It is much simpler to plan later on...
+ */
+object MultipleDistinctRewriter extends Rule[LogicalPlan] {
+
+  def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
+    case a: Aggregate => rewrite(a)
+    case p => p
+  }
+
+  def rewrite(a: Aggregate): Aggregate = {
+
+    // Collect all aggregate expressions.
+    val aggExpressions = a.aggregateExpressions.flatMap { e =>
+      e.collect {
+        case ae: AggregateExpression2 => ae
+      }
+    }
+
+    // Extract distinct aggregate expressions.
+    val distinctAggGroups = aggExpressions
+      .filter(_.isDistinct)
+      .groupBy(_.aggregateFunction.children.toSet)
+
+    // Only continue to rewrite if there is more than one distinct group.
+    if (distinctAggGroups.size > 1) {
+      // Create the attributes for the grouping id and the group by clause.
+      val gid = new AttributeReference("gid", IntegerType, false)()
+      val groupByMap = a.groupingExpressions.collect {
+        case ne: NamedExpression => ne -> ne.toAttribute
+        case e => e -> new AttributeReference(e.prettyName, e.dataType, e.nullable)()
+      }
+      val groupByAttrs = groupByMap.map(_._2)
+
+      // Functions used to modify aggregate functions and their inputs.
+      def evalWithinGroup(id: Literal, e: Expression) = If(EqualTo(gid, id), e, nullify(e))
+      def patchAggregateFunctionChildren(
+          af: AggregateFunction2,
+          id: Literal,
+          attrs: Map[Expression, Expression]): AggregateFunction2 = {
+        af.withNewChildren(af.children.map { case afc =>
+          evalWithinGroup(id, attrs(afc))
+        }).asInstanceOf[AggregateFunction2]
+      }
+
+      // Setup unique distinct aggregate children.
+      val distinctAggChildren = distinctAggGroups.keySet.flatten.toSeq
+      val distinctAggChildAttrMap = distinctAggChildren.map(expressionAttributePair).toMap
+      val distinctAggChildAttrs = distinctAggChildAttrMap.values.toSeq
+
+      // Setup expand & aggregate operators for distinct aggregate expressions.
+      val distinctAggOperatorMap = distinctAggGroups.toSeq.zipWithIndex.map {
+        case ((group, expressions), i) =>
+          val id = Literal(i + 1)
+
+          // Expand projection
+          val projection = distinctAggChildren.map {
+            case e if group.contains(e) => e
+            case e => nullify(e)
+          } :+ id
+
+          // Final aggregate
+          val operators = expressions.map { e =>
+            val af = e.aggregateFunction
+            val naf = patchAggregateFunctionChildren(af, id, distinctAggChildAttrMap)
+            (e, e.copy(aggregateFunction = naf, isDistinct = false))
+          }
+
+          (projection, operators)
+      }
+
+      // Setup expand for the 'regular' aggregate expressions.
+      val regularAggExprs = aggExpressions.filter(!_.isDistinct)
+      val regularAggChildren = regularAggExprs.flatMap(_.aggregateFunction.children).distinct
+      val regularAggChildAttrMap = regularAggChildren.map(expressionAttributePair).toMap
+
+      // Setup aggregates for 'regular' aggregate expressions.
+      val regularGroupId = Literal(0)
+      val regularAggOperatorMap = regularAggExprs.map { e =>
+        // Perform the actual aggregation in the initial aggregate.
+        val af = patchAggregateFunctionChildren(
+          e.aggregateFunction,
+          regularGroupId,
+          regularAggChildAttrMap)
+        val a = Alias(e.copy(aggregateFunction = af), e.toString)()
+
+        // Get the result of the first aggregate in the last aggregate.
+        val b = AggregateExpression2(
+          aggregate.First(evalWithinGroup(regularGroupId, a.toAttribute), Literal(true)),
+          mode = Complete,
+          isDistinct = false)
+
+        // Some aggregate functions (COUNT) have the special property that they can return a
+        // non-null result without any input. We need to make sure we return a result in this case.
+        val c = af.defaultResult match {
+          case Some(lit) => Coalesce(Seq(b, lit))
+          case None => b
+        }
+
+        (e, a, c)
+      }
+
+      // Construct the regular aggregate input projection only if we need one.
+      val regularAggProjection = if (regularAggExprs.nonEmpty) {
+        Seq(a.groupingExpressions ++
+          distinctAggChildren.map(nullify) ++
+          Seq(regularGroupId) ++
+          regularAggChildren)
+      } else {
+        Seq.empty[Seq[Expression]]
+      }
+
+      // Construct the distinct aggregate input projections.
+      val regularAggNulls = regularAggChildren.map(nullify)
+      val distinctAggProjections = distinctAggOperatorMap.map {
+        case (projection, _) =>
+          a.groupingExpressions ++
+            projection ++
+            regularAggNulls
+      }
+
+      // Construct the expand operator.
+      val expand = Expand(
+        regularAggProjection ++ distinctAggProjections,
+        groupByAttrs ++ distinctAggChildAttrs ++ Seq(gid) ++ regularAggChildAttrMap.values.toSeq,
+        a.child)
+
+      // Construct the first aggregate operator. This de-duplicates the all the children of
+      // distinct operators, and applies the regular aggregate operators.
+      val firstAggregateGroupBy = groupByAttrs ++ distinctAggChildAttrs :+ gid
+      val firstAggregate = Aggregate(
+        firstAggregateGroupBy,
+        firstAggregateGroupBy ++ regularAggOperatorMap.map(_._2),
+        expand)
+
+      // Construct the second aggregate
+      val transformations: Map[Expression, Expression] =
+        (distinctAggOperatorMap.flatMap(_._2) ++
+          regularAggOperatorMap.map(e => (e._1, e._3))).toMap
+
+      val patchedAggExpressions = a.aggregateExpressions.map { e =>
+        e.transformDown {
+          case e: Expression =>
+            // The same GROUP BY clauses can have different forms (different names for instance) in
+            // the groupBy and aggregate expressions of an aggregate. This makes a map lookup
+            // tricky. So we do a linear search for a semantically equal group by expression.
+            groupByMap
+              .find(ge => e.semanticEquals(ge._1))
+              .map(_._2)
+              .getOrElse(transformations.getOrElse(e, e))
+        }.asInstanceOf[NamedExpression]
+      }
+      Aggregate(groupByAttrs, patchedAggExpressions, firstAggregate)
+    } else {
+      a
+    }
+  }
+
+  private def nullify(e: Expression) = Literal.create(null, e.dataType)
+
+  private def expressionAttributePair(e: Expression) =
+    // We are creating a new reference here instead of reusing the attribute in case of a
+    // NamedExpression. This is done to prevent collisions between distinct and regular aggregate
+    // children, in this case attribute reuse causes the input of the regular aggregate to bound to
+    // the (nulled out) input of the distinct aggregate.
+    e -> new AttributeReference(e.prettyName, e.dataType, true)()
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index a2fab258fcac..5c5b3d1ccd3c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -133,6 +133,12 @@ sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInp
    */
   def supportsPartial: Boolean = true
 
+  /**
+   * Result of the aggregate function when the input is empty. This is currently only used for the
+   * proper rewriting of distinct aggregate functions.
+   */
+  def defaultResult: Option[Literal] = None
+
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
     throw new UnsupportedOperationException(s"Cannot evaluate expression: $this")
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index 338c5193cb7a..d222dfa33ad8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -200,9 +200,9 @@ object SetOperationPushDown extends Rule[LogicalPlan] with PredicateHelper {
  */
 object ColumnPruning extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
-    case a @ Aggregate(_, _, e @ Expand(_, groupByExprs, _, child))
-      if (child.outputSet -- AttributeSet(groupByExprs) -- a.references).nonEmpty =>
-      a.copy(child = e.copy(child = prunedChild(child, AttributeSet(groupByExprs) ++ a.references)))
+    case a @ Aggregate(_, _, e @ Expand(_, _, child))
+      if (child.outputSet -- AttributeSet(e.output) -- a.references).nonEmpty =>
+      a.copy(child = e.copy(child = prunedChild(child, AttributeSet(e.output) ++ a.references)))
 
     // Eliminate attributes that are not needed to calculate the specified aggregates.
     case a @ Aggregate(_, _, child) if (child.outputSet -- a.references).nonEmpty =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 4cb67aacf33e..fb963e2f8f7e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -235,33 +235,17 @@ case class Window(
     projectList ++ windowExpressions.map(_.toAttribute)
 }
 
-/**
- * Apply the all of the GroupExpressions to every input row, hence we will get
- * multiple output rows for a input row.
- * @param bitmasks The bitmask set represents the grouping sets
- * @param groupByExprs The grouping by expressions
- * @param child       Child operator
- */
-case class Expand(
-    bitmasks: Seq[Int],
-    groupByExprs: Seq[Expression],
-    gid: Attribute,
-    child: LogicalPlan) extends UnaryNode {
-  override def statistics: Statistics = {
-    val sizeInBytes = child.statistics.sizeInBytes * projections.length
-    Statistics(sizeInBytes = sizeInBytes)
-  }
-
-  val projections: Seq[Seq[Expression]] = expand()
-
+private[sql] object Expand {
   /**
-   * Extract attribute set according to the grouping id
+   * Extract attribute set according to the grouping id.
+   *
    * @param bitmask bitmask to represent the selected of the attribute sequence
    * @param exprs the attributes in sequence
    * @return the attributes of non selected specified via bitmask (with the bit set to 1)
    */
-  private def buildNonSelectExprSet(bitmask: Int, exprs: Seq[Expression])
-  : OpenHashSet[Expression] = {
+  private def buildNonSelectExprSet(
+      bitmask: Int,
+      exprs: Seq[Expression]): OpenHashSet[Expression] = {
     val set = new OpenHashSet[Expression](2)
 
     var bit = exprs.length - 1
@@ -274,18 +258,28 @@ case class Expand(
   }
 
   /**
-   * Create an array of Projections for the child projection, and replace the projections'
-   * expressions which equal GroupBy expressions with Literal(null), if those expressions
-   * are not set for this grouping set (according to the bit mask).
+   * Apply the all of the GroupExpressions to every input row, hence we will get
+   * multiple output rows for a input row.
+   *
+   * @param bitmasks The bitmask set represents the grouping sets
+   * @param groupByExprs The grouping by expressions
+   * @param gid Attribute of the grouping id
+   * @param child Child operator
    */
-  private[this] def expand(): Seq[Seq[Expression]] = {
-    val result = new scala.collection.mutable.ArrayBuffer[Seq[Expression]]
-
-    bitmasks.foreach { bitmask =>
+  def apply(
+    bitmasks: Seq[Int],
+    groupByExprs: Seq[Expression],
+    gid: Attribute,
+    child: LogicalPlan): Expand = {
+    // Create an array of Projections for the child projection, and replace the projections'
+    // expressions which equal GroupBy expressions with Literal(null), if those expressions
+    // are not set for this grouping set (according to the bit mask).
+    val projections = bitmasks.map { bitmask =>
       // get the non selected grouping attributes according to the bit mask
       val nonSelectedGroupExprSet = buildNonSelectExprSet(bitmask, groupByExprs)
 
-      val substitution = (child.output :+ gid).map(expr => expr transformDown {
+      (child.output :+ gid).map(expr => expr transformDown {
+        // TODO this causes a problem when a column is used both for grouping and aggregation.
         case x: Expression if nonSelectedGroupExprSet.contains(x) =>
           // if the input attribute in the Invalid Grouping Expression set of for this group
           // replace it with constant null
@@ -294,15 +288,29 @@ case class Expand(
           // replace the groupingId with concrete value (the bit mask)
           Literal.create(bitmask, IntegerType)
       })
-
-      result += substitution
     }
-
-    result.toSeq
+    Expand(projections, child.output :+ gid, child)
   }
+}
 
-  override def output: Seq[Attribute] = {
-    child.output :+ gid
+/**
+ * Apply a number of projections to every input row, hence we will get multiple output rows for
+ * a input row.
+ *
+ * @param projections to apply
+ * @param output of all projections.
+ * @param child operator.
+ */
+case class Expand(
+    projections: Seq[Seq[Expression]],
+    output: Seq[Attribute],
+    child: LogicalPlan) extends UnaryNode {
+
+  override def statistics: Statistics = {
+    // TODO shouldn't we factor in the size of the projection versus the size of the backing child
+    //      row?
+    val sizeInBytes = child.statistics.sizeInBytes * projections.length
+    Statistics(sizeInBytes = sizeInBytes)
   }
 }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index f4464e0b916f..dd3bb33c5728 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -420,7 +420,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         }
       case logical.Filter(condition, child) =>
         execution.Filter(condition, planLater(child)) :: Nil
-      case e @ logical.Expand(_, _, _, child) =>
+      case e @ logical.Expand(_, _, child) =>
         execution.Expand(e.projections, e.output, planLater(child)) :: Nil
       case a @ logical.Aggregate(group, agg, child) => {
         val useNewAggregation = sqlContext.conf.useSqlAggregate2 && sqlContext.conf.codegenEnabled

From 1c80d66e52c0bcc4e5adda78b3d8e5bf55e4f128 Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Fri, 6 Nov 2015 17:13:46 -0800
Subject: [PATCH 545/896] [SPARK-11546] Thrift server makes too many logs about
 result schema

SparkExecuteStatementOperation logs result schema for each getNextRowSet() calls which is by default every 1000 rows, overwhelming whole log file.

Author: navis.ryu <navis@apache.org>

Closes #9514 from navis/SPARK-11546.
---
 .../SparkExecuteStatementOperation.scala      | 24 ++++++++++---------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
index 719b03e1c7c7..82fef92dcb73 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
@@ -53,6 +53,18 @@ private[hive] class SparkExecuteStatementOperation(
   private var dataTypes: Array[DataType] = _
   private var statementId: String = _
 
+  private lazy val resultSchema: TableSchema = {
+    if (result == null || result.queryExecution.analyzed.output.size == 0) {
+      new TableSchema(Arrays.asList(new FieldSchema("Result", "string", "")))
+    } else {
+      logInfo(s"Result Schema: ${result.queryExecution.analyzed.output}")
+      val schema = result.queryExecution.analyzed.output.map { attr =>
+        new FieldSchema(attr.name, HiveMetastoreTypes.toMetastoreType(attr.dataType), "")
+      }
+      new TableSchema(schema.asJava)
+    }
+  }
+
   def close(): Unit = {
     // RDDs will be cleaned automatically upon garbage collection.
     hiveContext.sparkContext.clearJobGroup()
@@ -120,17 +132,7 @@ private[hive] class SparkExecuteStatementOperation(
     }
   }
 
-  def getResultSetSchema: TableSchema = {
-    if (result == null || result.queryExecution.analyzed.output.size == 0) {
-      new TableSchema(Arrays.asList(new FieldSchema("Result", "string", "")))
-    } else {
-      logInfo(s"Result Schema: ${result.queryExecution.analyzed.output}")
-      val schema = result.queryExecution.analyzed.output.map { attr =>
-        new FieldSchema(attr.name, HiveMetastoreTypes.toMetastoreType(attr.dataType), "")
-      }
-      new TableSchema(schema.asJava)
-    }
-  }
+  def getResultSetSchema: TableSchema = resultSchema
 
   override def run(): Unit = {
     setState(OperationState.PENDING)

From 105732dcc6b651b9779f4a5773a759c5b4fbd21d Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Fri, 6 Nov 2015 17:22:30 -0800
Subject: [PATCH 546/896] [HOTFIX] Fix python tests after #9527

#9527 missed updating the python tests.

Author: Michael Armbrust <michael@databricks.com>

Closes #9533 from marmbrus/hotfixTextValue.
---
 python/pyspark/sql/readwriter.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index 97bd90c4db82..927f4077424d 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -203,7 +203,7 @@ def text(self, path):
 
         >>> df = sqlContext.read.text('python/test_support/sql/text-test.txt')
         >>> df.collect()
-        [Row(text=u'hello'), Row(text=u'this')]
+        [Row(value=u'hello'), Row(value=u'this')]
         """
         return self._df(self._jreader.text(path))
 

From 30b706b7b36482921ec04145a0121ca147984fa8 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Fri, 6 Nov 2015 18:17:34 -0800
Subject: [PATCH 547/896] [SPARK-11389][CORE] Add support for off-heap memory
 to MemoryManager

In order to lay the groundwork for proper off-heap memory support in SQL / Tungsten, we need to extend our MemoryManager to perform bookkeeping for off-heap memory.

## User-facing changes

This PR introduces a new configuration, `spark.memory.offHeapSize` (name subject to change), which specifies the absolute amount of off-heap memory that Spark and Spark SQL can use. If Tungsten is configured to use off-heap execution memory for allocating data pages, then all data page allocations must fit within this size limit.

## Internals changes

This PR contains a lot of internal refactoring of the MemoryManager. The key change at the heart of this patch is the introduction of a `MemoryPool` class (name subject to change) to manage the bookkeeping for a particular category of memory (storage, on-heap execution, and off-heap execution). These MemoryPools are not fixed-size; they can be dynamically grown and shrunk according to the MemoryManager's policies. In StaticMemoryManager, these pools have fixed sizes, proportional to the legacy `[storage|shuffle].memoryFraction`. In the new UnifiedMemoryManager, the sizes of these pools are dynamically adjusted according to its policies.

There are two subclasses of `MemoryPool`: `StorageMemoryPool` manages storage memory and `ExecutionMemoryPool` manages execution memory. The MemoryManager creates two execution pools, one for on-heap memory and one for off-heap. Instances of `ExecutionMemoryPool` manage the logic for fair sharing of their pooled memory across running tasks (in other words, the ShuffleMemoryManager-like logic has been moved out of MemoryManager and pushed into these ExecutionMemoryPool instances).

I think that this design is substantially easier to understand and reason about than the previous design, where most of these responsibilities were handled by MemoryManager and its subclasses. To see this, take at look at how simple the logic in `UnifiedMemoryManager` has become: it's now very easy to see when memory is dynamically shifted between storage and execution.

## TODOs

- [x] Fix handful of test failures in the MemoryManagerSuites.
- [x] Fix remaining TODO comments in code.
- [ ] Document new configuration.
- [x] Fix commented-out tests / asserts:
  - [x] UnifiedMemoryManagerSuite.
- [x] Write tests that exercise the new off-heap memory management policies.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9344 from JoshRosen/offheap-memory-accounting.
---
 .../apache/spark/memory/MemoryConsumer.java   |   7 +-
 .../org/apache/spark/memory/MemoryMode.java   |  26 ++
 .../spark/memory/TaskMemoryManager.java       |  72 +++--
 .../scala/org/apache/spark/SparkEnv.scala     |   2 +-
 .../spark/memory/ExecutionMemoryPool.scala    | 153 +++++++++++
 .../apache/spark/memory/MemoryManager.scala   | 246 ++++++------------
 .../org/apache/spark/memory/MemoryPool.scala  |  71 +++++
 .../spark/memory/StaticMemoryManager.scala    |  75 +-----
 .../spark/memory/StorageMemoryPool.scala      | 138 ++++++++++
 .../spark/memory/UnifiedMemoryManager.scala   | 138 +++++-----
 .../org/apache/spark/memory/package.scala     |  75 ++++++
 .../spark/util/collection/Spillable.scala     |   8 +-
 .../spark/memory/TaskMemoryManagerSuite.java  |   8 +-
 .../spark/memory/TestMemoryConsumer.java      |  10 +-
 .../sort/UnsafeShuffleWriterSuite.java        |   2 +-
 .../map/AbstractBytesToBytesMapSuite.java     |   4 +-
 .../spark/memory/MemoryManagerSuite.scala     | 104 +++++---
 .../memory/StaticMemoryManagerSuite.scala     |  39 +--
 .../spark/memory/TestMemoryManager.scala      |  20 +-
 .../memory/UnifiedMemoryManagerSuite.scala    |  93 +++----
 .../spark/storage/BlockManagerSuite.scala     |   2 +-
 21 files changed, 828 insertions(+), 465 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/memory/MemoryMode.java
 create mode 100644 core/src/main/scala/org/apache/spark/memory/ExecutionMemoryPool.scala
 create mode 100644 core/src/main/scala/org/apache/spark/memory/MemoryPool.scala
 create mode 100644 core/src/main/scala/org/apache/spark/memory/StorageMemoryPool.scala
 create mode 100644 core/src/main/scala/org/apache/spark/memory/package.scala

diff --git a/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
index 8fbdb72832ad..36138cc9a297 100644
--- a/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
+++ b/core/src/main/java/org/apache/spark/memory/MemoryConsumer.java
@@ -17,15 +17,15 @@
 
 package org.apache.spark.memory;
 
-
 import java.io.IOException;
 
 import org.apache.spark.unsafe.array.LongArray;
 import org.apache.spark.unsafe.memory.MemoryBlock;
 
-
 /**
  * An memory consumer of TaskMemoryManager, which support spilling.
+ *
+ * Note: this only supports allocation / spilling of Tungsten memory.
  */
 public abstract class MemoryConsumer {
 
@@ -36,7 +36,6 @@ public abstract class MemoryConsumer {
   protected MemoryConsumer(TaskMemoryManager taskMemoryManager, long pageSize) {
     this.taskMemoryManager = taskMemoryManager;
     this.pageSize = pageSize;
-    this.used = 0;
   }
 
   protected MemoryConsumer(TaskMemoryManager taskMemoryManager) {
@@ -67,6 +66,8 @@ public void spill() throws IOException {
    *
    * Note: In order to avoid possible deadlock, should not call acquireMemory() from spill().
    *
+   * Note: today, this only frees Tungsten-managed pages.
+   *
    * @param size the amount of memory should be released
    * @param trigger the MemoryConsumer that trigger this spilling
    * @return the amount of released memory in bytes
diff --git a/core/src/main/java/org/apache/spark/memory/MemoryMode.java b/core/src/main/java/org/apache/spark/memory/MemoryMode.java
new file mode 100644
index 000000000000..3a5e72d8aaec
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/memory/MemoryMode.java
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory;
+
+import org.apache.spark.annotation.Private;
+
+@Private
+public enum MemoryMode {
+  ON_HEAP,
+  OFF_HEAP
+}
diff --git a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
index 6440f9c0f30d..5f743b28857b 100644
--- a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
+++ b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
@@ -103,10 +103,10 @@ public class TaskMemoryManager {
    * without doing any masking or lookups. Since this branching should be well-predicted by the JIT,
    * this extra layer of indirection / abstraction hopefully shouldn't be too expensive.
    */
-  private final boolean inHeap;
+  final MemoryMode tungstenMemoryMode;
 
   /**
-   * The size of memory granted to each consumer.
+   * Tracks spillable memory consumers.
    */
   @GuardedBy("this")
   private final HashSet<MemoryConsumer> consumers;
@@ -115,7 +115,7 @@ public class TaskMemoryManager {
    * Construct a new TaskMemoryManager.
    */
   public TaskMemoryManager(MemoryManager memoryManager, long taskAttemptId) {
-    this.inHeap = memoryManager.tungstenMemoryIsAllocatedInHeap();
+    this.tungstenMemoryMode = memoryManager.tungstenMemoryMode();
     this.memoryManager = memoryManager;
     this.taskAttemptId = taskAttemptId;
     this.consumers = new HashSet<>();
@@ -127,12 +127,19 @@ public TaskMemoryManager(MemoryManager memoryManager, long taskAttemptId) {
    *
    * @return number of bytes successfully granted (<= N).
    */
-  public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
+  public long acquireExecutionMemory(
+      long required,
+      MemoryMode mode,
+      MemoryConsumer consumer) {
     assert(required >= 0);
+    // If we are allocating Tungsten pages off-heap and receive a request to allocate on-heap
+    // memory here, then it may not make sense to spill since that would only end up freeing
+    // off-heap memory. This is subject to change, though, so it may be risky to make this
+    // optimization now in case we forget to undo it late when making changes.
     synchronized (this) {
-      long got = memoryManager.acquireExecutionMemory(required, taskAttemptId);
+      long got = memoryManager.acquireExecutionMemory(required, taskAttemptId, mode);
 
-      // try to release memory from other consumers first, then we can reduce the frequency of
+      // Try to release memory from other consumers first, then we can reduce the frequency of
       // spilling, avoid to have too many spilled files.
       if (got < required) {
         // Call spill() on other consumers to release memory
@@ -140,10 +147,10 @@ public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
           if (c != consumer && c.getUsed() > 0) {
             try {
               long released = c.spill(required - got, consumer);
-              if (released > 0) {
-                logger.info("Task {} released {} from {} for {}", taskAttemptId,
+              if (released > 0 && mode == tungstenMemoryMode) {
+                logger.debug("Task {} released {} from {} for {}", taskAttemptId,
                   Utils.bytesToString(released), c, consumer);
-                got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId);
+                got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId, mode);
                 if (got >= required) {
                   break;
                 }
@@ -161,10 +168,10 @@ public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
       if (got < required && consumer != null) {
         try {
           long released = consumer.spill(required - got, consumer);
-          if (released > 0) {
-            logger.info("Task {} released {} from itself ({})", taskAttemptId,
+          if (released > 0 && mode == tungstenMemoryMode) {
+            logger.debug("Task {} released {} from itself ({})", taskAttemptId,
               Utils.bytesToString(released), consumer);
-            got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId);
+            got += memoryManager.acquireExecutionMemory(required - got, taskAttemptId, mode);
           }
         } catch (IOException e) {
           logger.error("error while calling spill() on " + consumer, e);
@@ -184,9 +191,9 @@ public long acquireExecutionMemory(long required, MemoryConsumer consumer) {
   /**
    * Release N bytes of execution memory for a MemoryConsumer.
    */
-  public void releaseExecutionMemory(long size, MemoryConsumer consumer) {
+  public void releaseExecutionMemory(long size, MemoryMode mode, MemoryConsumer consumer) {
     logger.debug("Task {} release {} from {}", taskAttemptId, Utils.bytesToString(size), consumer);
-    memoryManager.releaseExecutionMemory(size, taskAttemptId);
+    memoryManager.releaseExecutionMemory(size, taskAttemptId, mode);
   }
 
   /**
@@ -195,11 +202,19 @@ public void releaseExecutionMemory(long size, MemoryConsumer consumer) {
   public void showMemoryUsage() {
     logger.info("Memory used in task " + taskAttemptId);
     synchronized (this) {
+      long memoryAccountedForByConsumers = 0;
       for (MemoryConsumer c: consumers) {
-        if (c.getUsed() > 0) {
-          logger.info("Acquired by " + c + ": " + Utils.bytesToString(c.getUsed()));
+        long totalMemUsage = c.getUsed();
+        memoryAccountedForByConsumers += totalMemUsage;
+        if (totalMemUsage > 0) {
+          logger.info("Acquired by " + c + ": " + Utils.bytesToString(totalMemUsage));
         }
       }
+      long memoryNotAccountedFor =
+        memoryManager.getExecutionMemoryUsageForTask(taskAttemptId) - memoryAccountedForByConsumers;
+      logger.info(
+        "{} bytes of memory were used by task {} but are not associated with specific consumers",
+        memoryNotAccountedFor, taskAttemptId);
     }
   }
 
@@ -214,7 +229,8 @@ public long pageSizeBytes() {
    * Allocate a block of memory that will be tracked in the MemoryManager's page table; this is
    * intended for allocating large blocks of Tungsten memory that will be shared between operators.
    *
-   * Returns `null` if there was not enough memory to allocate the page.
+   * Returns `null` if there was not enough memory to allocate the page. May return a page that
+   * contains fewer bytes than requested, so callers should verify the size of returned pages.
    */
   public MemoryBlock allocatePage(long size, MemoryConsumer consumer) {
     if (size > MAXIMUM_PAGE_SIZE_BYTES) {
@@ -222,7 +238,7 @@ public MemoryBlock allocatePage(long size, MemoryConsumer consumer) {
         "Cannot allocate a page with more than " + MAXIMUM_PAGE_SIZE_BYTES + " bytes");
     }
 
-    long acquired = acquireExecutionMemory(size, consumer);
+    long acquired = acquireExecutionMemory(size, tungstenMemoryMode, consumer);
     if (acquired <= 0) {
       return null;
     }
@@ -231,7 +247,7 @@ public MemoryBlock allocatePage(long size, MemoryConsumer consumer) {
     synchronized (this) {
       pageNumber = allocatedPages.nextClearBit(0);
       if (pageNumber >= PAGE_TABLE_SIZE) {
-        releaseExecutionMemory(acquired, consumer);
+        releaseExecutionMemory(acquired, tungstenMemoryMode, consumer);
         throw new IllegalStateException(
           "Have already allocated a maximum of " + PAGE_TABLE_SIZE + " pages");
       }
@@ -262,7 +278,7 @@ public void freePage(MemoryBlock page, MemoryConsumer consumer) {
     }
     long pageSize = page.size();
     memoryManager.tungstenMemoryAllocator().free(page);
-    releaseExecutionMemory(pageSize, consumer);
+    releaseExecutionMemory(pageSize, tungstenMemoryMode, consumer);
   }
 
   /**
@@ -276,7 +292,7 @@ public void freePage(MemoryBlock page, MemoryConsumer consumer) {
    * @return an encoded page address.
    */
   public long encodePageNumberAndOffset(MemoryBlock page, long offsetInPage) {
-    if (!inHeap) {
+    if (tungstenMemoryMode == MemoryMode.OFF_HEAP) {
       // In off-heap mode, an offset is an absolute address that may require a full 64 bits to
       // encode. Due to our page size limitation, though, we can convert this into an offset that's
       // relative to the page's base offset; this relative offset will fit in 51 bits.
@@ -305,7 +321,7 @@ private static long decodeOffset(long pagePlusOffsetAddress) {
    * {@link TaskMemoryManager#encodePageNumberAndOffset(MemoryBlock, long)}
    */
   public Object getPage(long pagePlusOffsetAddress) {
-    if (inHeap) {
+    if (tungstenMemoryMode == MemoryMode.ON_HEAP) {
       final int pageNumber = decodePageNumber(pagePlusOffsetAddress);
       assert (pageNumber >= 0 && pageNumber < PAGE_TABLE_SIZE);
       final MemoryBlock page = pageTable[pageNumber];
@@ -323,7 +339,7 @@ public Object getPage(long pagePlusOffsetAddress) {
    */
   public long getOffsetInPage(long pagePlusOffsetAddress) {
     final long offsetInPage = decodeOffset(pagePlusOffsetAddress);
-    if (inHeap) {
+    if (tungstenMemoryMode == MemoryMode.ON_HEAP) {
       return offsetInPage;
     } else {
       // In off-heap mode, an offset is an absolute address. In encodePageNumberAndOffset, we
@@ -351,11 +367,19 @@ public long cleanUpAllAllocatedMemory() {
       }
       consumers.clear();
     }
+
+    for (MemoryBlock page : pageTable) {
+      if (page != null) {
+        memoryManager.tungstenMemoryAllocator().free(page);
+      }
+    }
+    Arrays.fill(pageTable, null);
+
     return memoryManager.releaseAllExecutionMemoryForTask(taskAttemptId);
   }
 
   /**
-   * Returns the memory consumption, in bytes, for the current task
+   * Returns the memory consumption, in bytes, for the current task.
    */
   public long getMemoryConsumptionForThisTask() {
     return memoryManager.getExecutionMemoryUsageForTask(taskAttemptId);
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 23ae9360f6a2..4474a83bedbd 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -341,7 +341,7 @@ object SparkEnv extends Logging {
       if (useLegacyMemoryManager) {
         new StaticMemoryManager(conf, numUsableCores)
       } else {
-        new UnifiedMemoryManager(conf, numUsableCores)
+        UnifiedMemoryManager(conf, numUsableCores)
       }
 
     val blockTransferService = new NettyBlockTransferService(conf, securityManager, numUsableCores)
diff --git a/core/src/main/scala/org/apache/spark/memory/ExecutionMemoryPool.scala b/core/src/main/scala/org/apache/spark/memory/ExecutionMemoryPool.scala
new file mode 100644
index 000000000000..7825bae42587
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/ExecutionMemoryPool.scala
@@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.mutable
+
+import org.apache.spark.Logging
+
+/**
+ * Implements policies and bookkeeping for sharing a adjustable-sized pool of memory between tasks.
+ *
+ * Tries to ensure that each task gets a reasonable share of memory, instead of some task ramping up
+ * to a large amount first and then causing others to spill to disk repeatedly.
+ *
+ * If there are N tasks, it ensures that each task can acquire at least 1 / 2N of the memory
+ * before it has to spill, and at most 1 / N. Because N varies dynamically, we keep track of the
+ * set of active tasks and redo the calculations of 1 / 2N and 1 / N in waiting tasks whenever this
+ * set changes. This is all done by synchronizing access to mutable state and using wait() and
+ * notifyAll() to signal changes to callers. Prior to Spark 1.6, this arbitration of memory across
+ * tasks was performed by the ShuffleMemoryManager.
+ *
+ * @param lock a [[MemoryManager]] instance to synchronize on
+ * @param poolName a human-readable name for this pool, for use in log messages
+ */
+class ExecutionMemoryPool(
+    lock: Object,
+    poolName: String
+  ) extends MemoryPool(lock) with Logging {
+
+  /**
+   * Map from taskAttemptId -> memory consumption in bytes
+   */
+  @GuardedBy("lock")
+  private val memoryForTask = new mutable.HashMap[Long, Long]()
+
+  override def memoryUsed: Long = lock.synchronized {
+    memoryForTask.values.sum
+  }
+
+  /**
+   * Returns the memory consumption, in bytes, for the given task.
+   */
+  def getMemoryUsageForTask(taskAttemptId: Long): Long = lock.synchronized {
+    memoryForTask.getOrElse(taskAttemptId, 0L)
+  }
+
+  /**
+   * Try to acquire up to `numBytes` of memory for the given task and return the number of bytes
+   * obtained, or 0 if none can be allocated.
+   *
+   * This call may block until there is enough free memory in some situations, to make sure each
+   * task has a chance to ramp up to at least 1 / 2N of the total memory pool (where N is the # of
+   * active tasks) before it is forced to spill. This can happen if the number of tasks increase
+   * but an older task had a lot of memory already.
+   *
+   * @return the number of bytes granted to the task.
+   */
+  def acquireMemory(numBytes: Long, taskAttemptId: Long): Long = lock.synchronized {
+    assert(numBytes > 0, s"invalid number of bytes requested: $numBytes")
+
+    // Add this task to the taskMemory map just so we can keep an accurate count of the number
+    // of active tasks, to let other tasks ramp down their memory in calls to `acquireMemory`
+    if (!memoryForTask.contains(taskAttemptId)) {
+      memoryForTask(taskAttemptId) = 0L
+      // This will later cause waiting tasks to wake up and check numTasks again
+      lock.notifyAll()
+    }
+
+    // Keep looping until we're either sure that we don't want to grant this request (because this
+    // task would have more than 1 / numActiveTasks of the memory) or we have enough free
+    // memory to give it (we always let each task get at least 1 / (2 * numActiveTasks)).
+    // TODO: simplify this to limit each task to its own slot
+    while (true) {
+      val numActiveTasks = memoryForTask.keys.size
+      val curMem = memoryForTask(taskAttemptId)
+
+      // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
+      // don't let it be negative
+      val maxToGrant =
+        math.min(numBytes, math.max(0, (poolSize / numActiveTasks) - curMem))
+      // Only give it as much memory as is free, which might be none if it reached 1 / numTasks
+      val toGrant = math.min(maxToGrant, memoryFree)
+
+      if (curMem < poolSize / (2 * numActiveTasks)) {
+        // We want to let each task get at least 1 / (2 * numActiveTasks) before blocking;
+        // if we can't give it this much now, wait for other tasks to free up memory
+        // (this happens if older tasks allocated lots of memory before N grew)
+        if (memoryFree >= math.min(maxToGrant, poolSize / (2 * numActiveTasks) - curMem)) {
+          memoryForTask(taskAttemptId) += toGrant
+          return toGrant
+        } else {
+          logInfo(
+            s"TID $taskAttemptId waiting for at least 1/2N of $poolName pool to be free")
+          lock.wait()
+        }
+      } else {
+        memoryForTask(taskAttemptId) += toGrant
+        return toGrant
+      }
+    }
+    0L  // Never reached
+  }
+
+  /**
+   * Release `numBytes` of memory acquired by the given task.
+   */
+  def releaseMemory(numBytes: Long, taskAttemptId: Long): Unit = lock.synchronized {
+    val curMem = memoryForTask.getOrElse(taskAttemptId, 0L)
+    var memoryToFree = if (curMem < numBytes) {
+      logWarning(
+        s"Internal error: release called on $numBytes bytes but task only has $curMem bytes " +
+          s"of memory from the $poolName pool")
+      curMem
+    } else {
+      numBytes
+    }
+    if (memoryForTask.contains(taskAttemptId)) {
+      memoryForTask(taskAttemptId) -= memoryToFree
+      if (memoryForTask(taskAttemptId) <= 0) {
+        memoryForTask.remove(taskAttemptId)
+      }
+    }
+    lock.notifyAll() // Notify waiters in acquireMemory() that memory has been freed
+  }
+
+  /**
+   * Release all memory for the given task and mark it as inactive (e.g. when a task ends).
+   * @return the number of bytes freed.
+   */
+  def releaseAllMemoryForTask(taskAttemptId: Long): Long = lock.synchronized {
+    val numBytesToFree = getMemoryUsageForTask(taskAttemptId)
+    releaseMemory(numBytesToFree, taskAttemptId)
+    numBytesToFree
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
index b0cf2696a397..ceb8ea434e1b 100644
--- a/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryManager.scala
@@ -20,12 +20,8 @@ package org.apache.spark.memory
 import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.mutable
-import scala.collection.mutable.ArrayBuffer
 
-import com.google.common.annotations.VisibleForTesting
-
-import org.apache.spark.util.Utils
-import org.apache.spark.{SparkException, TaskContext, SparkConf, Logging}
+import org.apache.spark.{SparkConf, Logging}
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore}
 import org.apache.spark.unsafe.array.ByteArrayMethods
 import org.apache.spark.unsafe.memory.MemoryAllocator
@@ -36,53 +32,40 @@ import org.apache.spark.unsafe.memory.MemoryAllocator
  * In this context, execution memory refers to that used for computation in shuffles, joins,
  * sorts and aggregations, while storage memory refers to that used for caching and propagating
  * internal data across the cluster. There exists one MemoryManager per JVM.
- *
- * The MemoryManager abstract base class itself implements policies for sharing execution memory
- * between tasks; it tries to ensure that each task gets a reasonable share of memory, instead of
- * some task ramping up to a large amount first and then causing others to spill to disk repeatedly.
- * If there are N tasks, it ensures that each task can acquire at least 1 / 2N of the memory
- * before it has to spill, and at most 1 / N. Because N varies dynamically, we keep track of the
- * set of active tasks and redo the calculations of 1 / 2N and 1 / N in waiting tasks whenever
- * this set changes. This is all done by synchronizing access to mutable state and using wait() and
- * notifyAll() to signal changes to callers. Prior to Spark 1.6, this arbitration of memory across
- * tasks was performed by the ShuffleMemoryManager.
  */
-private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) extends Logging {
+private[spark] abstract class MemoryManager(
+    conf: SparkConf,
+    numCores: Int,
+    storageMemory: Long,
+    onHeapExecutionMemory: Long) extends Logging {
 
   // -- Methods related to memory allocation policies and bookkeeping ------------------------------
 
-  // The memory store used to evict cached blocks
-  private var _memoryStore: MemoryStore = _
-  protected def memoryStore: MemoryStore = {
-    if (_memoryStore == null) {
-      throw new IllegalArgumentException("memory store not initialized yet")
-    }
-    _memoryStore
-  }
+  @GuardedBy("this")
+  protected val storageMemoryPool = new StorageMemoryPool(this)
+  @GuardedBy("this")
+  protected val onHeapExecutionMemoryPool = new ExecutionMemoryPool(this, "on-heap execution")
+  @GuardedBy("this")
+  protected val offHeapExecutionMemoryPool = new ExecutionMemoryPool(this, "off-heap execution")
 
-  // Amount of execution/storage memory in use, accesses must be synchronized on `this`
-  @GuardedBy("this") protected var _executionMemoryUsed: Long = 0
-  @GuardedBy("this") protected var _storageMemoryUsed: Long = 0
-  // Map from taskAttemptId -> memory consumption in bytes
-  @GuardedBy("this") private val executionMemoryForTask = new mutable.HashMap[Long, Long]()
-
-  /**
-   * Set the [[MemoryStore]] used by this manager to evict cached blocks.
-   * This must be set after construction due to initialization ordering constraints.
-   */
-  final def setMemoryStore(store: MemoryStore): Unit = {
-    _memoryStore = store
-  }
+  storageMemoryPool.incrementPoolSize(storageMemory)
+  onHeapExecutionMemoryPool.incrementPoolSize(onHeapExecutionMemory)
+  offHeapExecutionMemoryPool.incrementPoolSize(conf.getSizeAsBytes("spark.memory.offHeapSize", 0))
 
   /**
-   * Total available memory for execution, in bytes.
+   * Total available memory for storage, in bytes. This amount can vary over time, depending on
+   * the MemoryManager implementation.
+   * In this model, this is equivalent to the amount of memory not occupied by execution.
    */
-  def maxExecutionMemory: Long
+  def maxStorageMemory: Long
 
   /**
-   * Total available memory for storage, in bytes.
+   * Set the [[MemoryStore]] used by this manager to evict cached blocks.
+   * This must be set after construction due to initialization ordering constraints.
    */
-  def maxStorageMemory: Long
+  final def setMemoryStore(store: MemoryStore): Unit = synchronized {
+    storageMemoryPool.setMemoryStore(store)
+  }
 
   // TODO: avoid passing evicted blocks around to simplify method signatures (SPARK-10985)
 
@@ -94,7 +77,9 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
   def acquireStorageMemory(
       blockId: BlockId,
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    storageMemoryPool.acquireMemory(blockId, numBytes, evictedBlocks)
+  }
 
   /**
    * Acquire N bytes of memory to unroll the given block, evicting existing ones if necessary.
@@ -109,103 +94,25 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
   def acquireUnrollMemory(
       blockId: BlockId,
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
-    acquireStorageMemory(blockId, numBytes, evictedBlocks)
-  }
-
-  /**
-   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
-   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
-   * @return number of bytes successfully granted (<= N).
-   */
-  @VisibleForTesting
-  private[memory] def doAcquireExecutionMemory(
-      numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean
 
   /**
-   * Try to acquire up to `numBytes` of execution memory for the current task and return the number
-   * of bytes obtained, or 0 if none can be allocated.
+   * Try to acquire up to `numBytes` of execution memory for the current task and return the
+   * number of bytes obtained, or 0 if none can be allocated.
    *
    * This call may block until there is enough free memory in some situations, to make sure each
    * task has a chance to ramp up to at least 1 / 2N of the total memory pool (where N is the # of
    * active tasks) before it is forced to spill. This can happen if the number of tasks increase
    * but an older task had a lot of memory already.
-   *
-   * Subclasses should override `doAcquireExecutionMemory` in order to customize the policies
-   * that control global sharing of memory between execution and storage.
    */
   private[memory]
-  final def acquireExecutionMemory(numBytes: Long, taskAttemptId: Long): Long = synchronized {
-    assert(numBytes > 0, "invalid number of bytes requested: " + numBytes)
-
-    // Add this task to the taskMemory map just so we can keep an accurate count of the number
-    // of active tasks, to let other tasks ramp down their memory in calls to tryToAcquire
-    if (!executionMemoryForTask.contains(taskAttemptId)) {
-      executionMemoryForTask(taskAttemptId) = 0L
-      // This will later cause waiting tasks to wake up and check numTasks again
-      notifyAll()
-    }
-
-    // Once the cross-task memory allocation policy has decided to grant more memory to a task,
-    // this method is called in order to actually obtain that execution memory, potentially
-    // triggering eviction of storage memory:
-    def acquire(toGrant: Long): Long = synchronized {
-      val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
-      val acquired = doAcquireExecutionMemory(toGrant, evictedBlocks)
-      // Register evicted blocks, if any, with the active task metrics
-      Option(TaskContext.get()).foreach { tc =>
-        val metrics = tc.taskMetrics()
-        val lastUpdatedBlocks = metrics.updatedBlocks.getOrElse(Seq[(BlockId, BlockStatus)]())
-        metrics.updatedBlocks = Some(lastUpdatedBlocks ++ evictedBlocks.toSeq)
-      }
-      executionMemoryForTask(taskAttemptId) += acquired
-      acquired
-    }
-
-    // Keep looping until we're either sure that we don't want to grant this request (because this
-    // task would have more than 1 / numActiveTasks of the memory) or we have enough free
-    // memory to give it (we always let each task get at least 1 / (2 * numActiveTasks)).
-    // TODO: simplify this to limit each task to its own slot
-    while (true) {
-      val numActiveTasks = executionMemoryForTask.keys.size
-      val curMem = executionMemoryForTask(taskAttemptId)
-      val freeMemory = maxExecutionMemory - executionMemoryForTask.values.sum
-
-      // How much we can grant this task; don't let it grow to more than 1 / numActiveTasks;
-      // don't let it be negative
-      val maxToGrant =
-        math.min(numBytes, math.max(0, (maxExecutionMemory / numActiveTasks) - curMem))
-      // Only give it as much memory as is free, which might be none if it reached 1 / numTasks
-      val toGrant = math.min(maxToGrant, freeMemory)
-
-      if (curMem < maxExecutionMemory / (2 * numActiveTasks)) {
-        // We want to let each task get at least 1 / (2 * numActiveTasks) before blocking;
-        // if we can't give it this much now, wait for other tasks to free up memory
-        // (this happens if older tasks allocated lots of memory before N grew)
-        if (
-          freeMemory >= math.min(maxToGrant, maxExecutionMemory / (2 * numActiveTasks) - curMem)) {
-          return acquire(toGrant)
-        } else {
-          logInfo(
-            s"TID $taskAttemptId waiting for at least 1/2N of execution memory pool to be free")
-          wait()
-        }
-      } else {
-        return acquire(toGrant)
-      }
-    }
-    0L  // Never reached
-  }
-
-  @VisibleForTesting
-  private[memory] def releaseExecutionMemory(numBytes: Long): Unit = synchronized {
-    if (numBytes > _executionMemoryUsed) {
-      logWarning(s"Attempted to release $numBytes bytes of execution " +
-        s"memory when we only have ${_executionMemoryUsed} bytes")
-      _executionMemoryUsed = 0
-    } else {
-      _executionMemoryUsed -= numBytes
+  def acquireExecutionMemory(
+      numBytes: Long,
+      taskAttemptId: Long,
+      memoryMode: MemoryMode): Long = synchronized {
+    memoryMode match {
+      case MemoryMode.ON_HEAP => onHeapExecutionMemoryPool.acquireMemory(numBytes, taskAttemptId)
+      case MemoryMode.OFF_HEAP => offHeapExecutionMemoryPool.acquireMemory(numBytes, taskAttemptId)
     }
   }
 
@@ -213,24 +120,14 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
    * Release numBytes of execution memory belonging to the given task.
    */
   private[memory]
-  final def releaseExecutionMemory(numBytes: Long, taskAttemptId: Long): Unit = synchronized {
-    val curMem = executionMemoryForTask.getOrElse(taskAttemptId, 0L)
-    if (curMem < numBytes) {
-      if (Utils.isTesting) {
-        throw new SparkException(
-          s"Internal error: release called on $numBytes bytes but task only has $curMem")
-      } else {
-        logWarning(s"Internal error: release called on $numBytes bytes but task only has $curMem")
-      }
-    }
-    if (executionMemoryForTask.contains(taskAttemptId)) {
-      executionMemoryForTask(taskAttemptId) -= numBytes
-      if (executionMemoryForTask(taskAttemptId) <= 0) {
-        executionMemoryForTask.remove(taskAttemptId)
-      }
-      releaseExecutionMemory(numBytes)
+  def releaseExecutionMemory(
+      numBytes: Long,
+      taskAttemptId: Long,
+      memoryMode: MemoryMode): Unit = synchronized {
+    memoryMode match {
+      case MemoryMode.ON_HEAP => onHeapExecutionMemoryPool.releaseMemory(numBytes, taskAttemptId)
+      case MemoryMode.OFF_HEAP => offHeapExecutionMemoryPool.releaseMemory(numBytes, taskAttemptId)
     }
-    notifyAll() // Notify waiters in acquireExecutionMemory() that memory has been freed
   }
 
   /**
@@ -238,35 +135,28 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
    * @return the number of bytes freed.
    */
   private[memory] def releaseAllExecutionMemoryForTask(taskAttemptId: Long): Long = synchronized {
-    val numBytesToFree = getExecutionMemoryUsageForTask(taskAttemptId)
-    releaseExecutionMemory(numBytesToFree, taskAttemptId)
-    numBytesToFree
+    onHeapExecutionMemoryPool.releaseAllMemoryForTask(taskAttemptId) +
+      offHeapExecutionMemoryPool.releaseAllMemoryForTask(taskAttemptId)
   }
 
   /**
    * Release N bytes of storage memory.
    */
   def releaseStorageMemory(numBytes: Long): Unit = synchronized {
-    if (numBytes > _storageMemoryUsed) {
-      logWarning(s"Attempted to release $numBytes bytes of storage " +
-        s"memory when we only have ${_storageMemoryUsed} bytes")
-      _storageMemoryUsed = 0
-    } else {
-      _storageMemoryUsed -= numBytes
-    }
+    storageMemoryPool.releaseMemory(numBytes)
   }
 
   /**
    * Release all storage memory acquired.
    */
-  def releaseAllStorageMemory(): Unit = synchronized {
-    _storageMemoryUsed = 0
+  final def releaseAllStorageMemory(): Unit = synchronized {
+    storageMemoryPool.releaseAllMemory()
   }
 
   /**
    * Release N bytes of unroll memory.
    */
-  def releaseUnrollMemory(numBytes: Long): Unit = synchronized {
+  final def releaseUnrollMemory(numBytes: Long): Unit = synchronized {
     releaseStorageMemory(numBytes)
   }
 
@@ -274,25 +164,34 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
    * Execution memory currently in use, in bytes.
    */
   final def executionMemoryUsed: Long = synchronized {
-    _executionMemoryUsed
+    onHeapExecutionMemoryPool.memoryUsed + offHeapExecutionMemoryPool.memoryUsed
   }
 
   /**
    * Storage memory currently in use, in bytes.
    */
   final def storageMemoryUsed: Long = synchronized {
-    _storageMemoryUsed
+    storageMemoryPool.memoryUsed
   }
 
   /**
    * Returns the execution memory consumption, in bytes, for the given task.
    */
   private[memory] def getExecutionMemoryUsageForTask(taskAttemptId: Long): Long = synchronized {
-    executionMemoryForTask.getOrElse(taskAttemptId, 0L)
+    onHeapExecutionMemoryPool.getMemoryUsageForTask(taskAttemptId) +
+      offHeapExecutionMemoryPool.getMemoryUsageForTask(taskAttemptId)
   }
 
   // -- Fields related to Tungsten managed memory -------------------------------------------------
 
+  /**
+   * Tracks whether Tungsten memory will be allocated on the JVM heap or off-heap using
+   * sun.misc.Unsafe.
+   */
+  final val tungstenMemoryMode: MemoryMode = {
+    if (conf.getBoolean("spark.unsafe.offHeap", false)) MemoryMode.OFF_HEAP else MemoryMode.ON_HEAP
+  }
+
   /**
    * The default page size, in bytes.
    *
@@ -306,21 +205,22 @@ private[spark] abstract class MemoryManager(conf: SparkConf, numCores: Int) exte
     val cores = if (numCores > 0) numCores else Runtime.getRuntime.availableProcessors()
     // Because of rounding to next power of 2, we may have safetyFactor as 8 in worst case
     val safetyFactor = 16
-    val size = ByteArrayMethods.nextPowerOf2(maxExecutionMemory / cores / safetyFactor)
+    val maxTungstenMemory: Long = tungstenMemoryMode match {
+      case MemoryMode.ON_HEAP => onHeapExecutionMemoryPool.poolSize
+      case MemoryMode.OFF_HEAP => offHeapExecutionMemoryPool.poolSize
+    }
+    val size = ByteArrayMethods.nextPowerOf2(maxTungstenMemory / cores / safetyFactor)
     val default = math.min(maxPageSize, math.max(minPageSize, size))
     conf.getSizeAsBytes("spark.buffer.pageSize", default)
   }
 
-  /**
-   * Tracks whether Tungsten memory will be allocated on the JVM heap or off-heap using
-   * sun.misc.Unsafe.
-   */
-  final val tungstenMemoryIsAllocatedInHeap: Boolean =
-    !conf.getBoolean("spark.unsafe.offHeap", false)
-
   /**
    * Allocates memory for use by Unsafe/Tungsten code.
    */
-  private[memory] final val tungstenMemoryAllocator: MemoryAllocator =
-    if (tungstenMemoryIsAllocatedInHeap) MemoryAllocator.HEAP else MemoryAllocator.UNSAFE
+  private[memory] final val tungstenMemoryAllocator: MemoryAllocator = {
+    tungstenMemoryMode match {
+      case MemoryMode.ON_HEAP => MemoryAllocator.HEAP
+      case MemoryMode.OFF_HEAP => MemoryAllocator.UNSAFE
+    }
+  }
 }
diff --git a/core/src/main/scala/org/apache/spark/memory/MemoryPool.scala b/core/src/main/scala/org/apache/spark/memory/MemoryPool.scala
new file mode 100644
index 000000000000..bfeec47e3892
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/MemoryPool.scala
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import javax.annotation.concurrent.GuardedBy
+
+/**
+ * Manages bookkeeping for an adjustable-sized region of memory. This class is internal to
+ * the [[MemoryManager]]. See subclasses for more details.
+ *
+ * @param lock a [[MemoryManager]] instance, used for synchronization. We purposely erase the type
+ *             to `Object` to avoid programming errors, since this object should only be used for
+ *             synchronization purposes.
+ */
+abstract class MemoryPool(lock: Object) {
+
+  @GuardedBy("lock")
+  private[this] var _poolSize: Long = 0
+
+  /**
+   * Returns the current size of the pool, in bytes.
+   */
+  final def poolSize: Long = lock.synchronized {
+    _poolSize
+  }
+
+  /**
+   * Returns the amount of free memory in the pool, in bytes.
+   */
+  final def memoryFree: Long = lock.synchronized {
+    _poolSize - memoryUsed
+  }
+
+  /**
+   * Expands the pool by `delta` bytes.
+   */
+  final def incrementPoolSize(delta: Long): Unit = lock.synchronized {
+    require(delta >= 0)
+    _poolSize += delta
+  }
+
+  /**
+   * Shrinks the pool by `delta` bytes.
+   */
+  final def decrementPoolSize(delta: Long): Unit = lock.synchronized {
+    require(delta >= 0)
+    require(delta <= _poolSize)
+    require(_poolSize - delta >= memoryUsed)
+    _poolSize -= delta
+  }
+
+  /**
+   * Returns the amount of used memory in this pool (in bytes).
+   */
+  def memoryUsed: Long
+}
diff --git a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
index 9c2c2e90a228..12a094306861 100644
--- a/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/StaticMemoryManager.scala
@@ -22,7 +22,6 @@ import scala.collection.mutable
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockId, BlockStatus}
 
-
 /**
  * A [[MemoryManager]] that statically partitions the heap space into disjoint regions.
  *
@@ -32,10 +31,14 @@ import org.apache.spark.storage.{BlockId, BlockStatus}
  */
 private[spark] class StaticMemoryManager(
     conf: SparkConf,
-    override val maxExecutionMemory: Long,
+    maxOnHeapExecutionMemory: Long,
     override val maxStorageMemory: Long,
     numCores: Int)
-  extends MemoryManager(conf, numCores) {
+  extends MemoryManager(
+    conf,
+    numCores,
+    maxStorageMemory,
+    maxOnHeapExecutionMemory) {
 
   def this(conf: SparkConf, numCores: Int) {
     this(
@@ -50,76 +53,15 @@ private[spark] class StaticMemoryManager(
     (maxStorageMemory * conf.getDouble("spark.storage.unrollFraction", 0.2)).toLong
   }
 
-  /**
-   * Acquire N bytes of memory for execution.
-   * @return number of bytes successfully granted (<= N).
-   */
-  override def doAcquireExecutionMemory(
-      numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
-    assert(numBytes >= 0)
-    assert(_executionMemoryUsed <= maxExecutionMemory)
-    val bytesToGrant = math.min(numBytes, maxExecutionMemory - _executionMemoryUsed)
-    _executionMemoryUsed += bytesToGrant
-    bytesToGrant
-  }
-
-  /**
-   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
-   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
-   * @return whether all N bytes were successfully granted.
-   */
-  override def acquireStorageMemory(
-      blockId: BlockId,
-      numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
-    acquireStorageMemory(blockId, numBytes, numBytes, evictedBlocks)
-  }
-
-  /**
-   * Acquire N bytes of memory to unroll the given block, evicting existing ones if necessary.
-   *
-   * This evicts at most M bytes worth of existing blocks, where M is a fraction of the storage
-   * space specified by `spark.storage.unrollFraction`. Blocks evicted in the process, if any,
-   * are added to `evictedBlocks`.
-   *
-   * @return whether all N bytes were successfully granted.
-   */
   override def acquireUnrollMemory(
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
-    val currentUnrollMemory = memoryStore.currentUnrollMemory
+    val currentUnrollMemory = storageMemoryPool.memoryStore.currentUnrollMemory
     val maxNumBytesToFree = math.max(0, maxMemoryToEvictForUnroll - currentUnrollMemory)
     val numBytesToFree = math.min(numBytes, maxNumBytesToFree)
-    acquireStorageMemory(blockId, numBytes, numBytesToFree, evictedBlocks)
+    storageMemoryPool.acquireMemory(blockId, numBytes, numBytesToFree, evictedBlocks)
   }
-
-  /**
-   * Acquire N bytes of storage memory for the given block, evicting existing ones if necessary.
-   *
-   * @param blockId the ID of the block we are acquiring storage memory for
-   * @param numBytesToAcquire the size of this block
-   * @param numBytesToFree the size of space to be freed through evicting blocks
-   * @param evictedBlocks a holder for blocks evicted in the process
-   * @return whether all N bytes were successfully granted.
-   */
-  private def acquireStorageMemory(
-      blockId: BlockId,
-      numBytesToAcquire: Long,
-      numBytesToFree: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
-    assert(numBytesToAcquire >= 0)
-    assert(numBytesToFree >= 0)
-    memoryStore.ensureFreeSpace(blockId, numBytesToFree, evictedBlocks)
-    assert(_storageMemoryUsed <= maxStorageMemory)
-    val enoughMemory = _storageMemoryUsed + numBytesToAcquire <= maxStorageMemory
-    if (enoughMemory) {
-      _storageMemoryUsed += numBytesToAcquire
-    }
-    enoughMemory
-  }
-
 }
 
 
@@ -135,7 +77,6 @@ private[spark] object StaticMemoryManager {
     (systemMaxMemory * memoryFraction * safetyFraction).toLong
   }
 
-
   /**
    * Return the total amount of memory available for the execution region, in bytes.
    */
diff --git a/core/src/main/scala/org/apache/spark/memory/StorageMemoryPool.scala b/core/src/main/scala/org/apache/spark/memory/StorageMemoryPool.scala
new file mode 100644
index 000000000000..6a322eabf81e
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/StorageMemoryPool.scala
@@ -0,0 +1,138 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.memory
+
+import javax.annotation.concurrent.GuardedBy
+
+import scala.collection.mutable
+import scala.collection.mutable.ArrayBuffer
+
+import org.apache.spark.{TaskContext, Logging}
+import org.apache.spark.storage.{MemoryStore, BlockStatus, BlockId}
+
+/**
+ * Performs bookkeeping for managing an adjustable-size pool of memory that is used for storage
+ * (caching).
+ *
+ * @param lock a [[MemoryManager]] instance to synchronize on
+ */
+class StorageMemoryPool(lock: Object) extends MemoryPool(lock) with Logging {
+
+  @GuardedBy("lock")
+  private[this] var _memoryUsed: Long = 0L
+
+  override def memoryUsed: Long = lock.synchronized {
+    _memoryUsed
+  }
+
+  private var _memoryStore: MemoryStore = _
+  def memoryStore: MemoryStore = {
+    if (_memoryStore == null) {
+      throw new IllegalStateException("memory store not initialized yet")
+    }
+    _memoryStore
+  }
+
+  /**
+   * Set the [[MemoryStore]] used by this manager to evict cached blocks.
+   * This must be set after construction due to initialization ordering constraints.
+   */
+  final def setMemoryStore(store: MemoryStore): Unit = {
+    _memoryStore = store
+  }
+
+  /**
+   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
+   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
+   * @return whether all N bytes were successfully granted.
+   */
+  def acquireMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = lock.synchronized {
+    acquireMemory(blockId, numBytes, numBytes, evictedBlocks)
+  }
+
+  /**
+   * Acquire N bytes of storage memory for the given block, evicting existing ones if necessary.
+   *
+   * @param blockId the ID of the block we are acquiring storage memory for
+   * @param numBytesToAcquire the size of this block
+   * @param numBytesToFree the size of space to be freed through evicting blocks
+   * @return whether all N bytes were successfully granted.
+   */
+  def acquireMemory(
+      blockId: BlockId,
+      numBytesToAcquire: Long,
+      numBytesToFree: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = lock.synchronized {
+    assert(numBytesToAcquire >= 0)
+    assert(numBytesToFree >= 0)
+    assert(memoryUsed <= poolSize)
+    memoryStore.ensureFreeSpace(blockId, numBytesToFree, evictedBlocks)
+    // Register evicted blocks, if any, with the active task metrics
+    Option(TaskContext.get()).foreach { tc =>
+      val metrics = tc.taskMetrics()
+      val lastUpdatedBlocks = metrics.updatedBlocks.getOrElse(Seq[(BlockId, BlockStatus)]())
+      metrics.updatedBlocks = Some(lastUpdatedBlocks ++ evictedBlocks.toSeq)
+    }
+    // NOTE: If the memory store evicts blocks, then those evictions will synchronously call
+    // back into this StorageMemoryPool in order to free. Therefore, these variables should have
+    // been updated.
+    val enoughMemory = numBytesToAcquire <= memoryFree
+    if (enoughMemory) {
+      _memoryUsed += numBytesToAcquire
+    }
+    enoughMemory
+  }
+
+  def releaseMemory(size: Long): Unit = lock.synchronized {
+    if (size > _memoryUsed) {
+      logWarning(s"Attempted to release $size bytes of storage " +
+        s"memory when we only have ${_memoryUsed} bytes")
+      _memoryUsed = 0
+    } else {
+      _memoryUsed -= size
+    }
+  }
+
+  def releaseAllMemory(): Unit = lock.synchronized {
+    _memoryUsed = 0
+  }
+
+  /**
+   * Try to shrink the size of this storage memory pool by `spaceToFree` bytes. Return the number
+   * of bytes removed from the pool's capacity.
+   */
+  def shrinkPoolToFreeSpace(spaceToFree: Long): Long = lock.synchronized {
+    // First, shrink the pool by reclaiming free memory:
+    val spaceFreedByReleasingUnusedMemory = Math.min(spaceToFree, memoryFree)
+    decrementPoolSize(spaceFreedByReleasingUnusedMemory)
+    if (spaceFreedByReleasingUnusedMemory == spaceToFree) {
+      spaceFreedByReleasingUnusedMemory
+    } else {
+      // If reclaiming free memory did not adequately shrink the pool, begin evicting blocks:
+      val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
+      memoryStore.ensureFreeSpace(spaceToFree - spaceFreedByReleasingUnusedMemory, evictedBlocks)
+      val spaceFreedByEviction = evictedBlocks.map(_._2.memSize).sum
+      _memoryUsed -= spaceFreedByEviction
+      decrementPoolSize(spaceFreedByEviction)
+      spaceFreedByReleasingUnusedMemory + spaceFreedByEviction
+    }
+  }
+}
diff --git a/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
index a3093030a0f9..8be5b0541909 100644
--- a/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
+++ b/core/src/main/scala/org/apache/spark/memory/UnifiedMemoryManager.scala
@@ -22,7 +22,6 @@ import scala.collection.mutable
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockStatus, BlockId}
 
-
 /**
  * A [[MemoryManager]] that enforces a soft boundary between execution and storage such that
  * either side can borrow memory from the other.
@@ -41,98 +40,105 @@ import org.apache.spark.storage.{BlockStatus, BlockId}
  * The implication is that attempts to cache blocks may fail if execution has already eaten
  * up most of the storage space, in which case the new blocks will be evicted immediately
  * according to their respective storage levels.
+ *
+ * @param storageRegionSize Size of the storage region, in bytes.
+ *                          This region is not statically reserved; execution can borrow from
+ *                          it if necessary. Cached blocks can be evicted only if actual
+ *                          storage memory usage exceeds this region.
  */
-private[spark] class UnifiedMemoryManager(
+private[spark] class UnifiedMemoryManager private[memory] (
     conf: SparkConf,
     maxMemory: Long,
+    private val storageRegionSize: Long,
     numCores: Int)
-  extends MemoryManager(conf, numCores) {
-
-  def this(conf: SparkConf, numCores: Int) {
-    this(conf, UnifiedMemoryManager.getMaxMemory(conf), numCores)
-  }
-
-  /**
-   * Size of the storage region, in bytes.
-   *
-   * This region is not statically reserved; execution can borrow from it if necessary.
-   * Cached blocks can be evicted only if actual storage memory usage exceeds this region.
-   */
-  private val storageRegionSize: Long = {
-    (maxMemory * conf.getDouble("spark.memory.storageFraction", 0.5)).toLong
-  }
-
-  /**
-   * Total amount of memory, in bytes, not currently occupied by either execution or storage.
-   */
-  private def totalFreeMemory: Long = synchronized {
-    assert(_executionMemoryUsed <= maxMemory)
-    assert(_storageMemoryUsed <= maxMemory)
-    assert(_executionMemoryUsed + _storageMemoryUsed <= maxMemory)
-    maxMemory - _executionMemoryUsed - _storageMemoryUsed
-  }
+  extends MemoryManager(
+    conf,
+    numCores,
+    storageRegionSize,
+    maxMemory - storageRegionSize) {
 
-  /**
-   * Total available memory for execution, in bytes.
-   * In this model, this is equivalent to the amount of memory not occupied by storage.
-   */
-  override def maxExecutionMemory: Long = synchronized {
-    maxMemory - _storageMemoryUsed
-  }
+  // We always maintain this invariant:
+  assert(onHeapExecutionMemoryPool.poolSize + storageMemoryPool.poolSize == maxMemory)
 
-  /**
-   * Total available memory for storage, in bytes.
-   * In this model, this is equivalent to the amount of memory not occupied by execution.
-   */
   override def maxStorageMemory: Long = synchronized {
-    maxMemory - _executionMemoryUsed
+    maxMemory - onHeapExecutionMemoryPool.memoryUsed
   }
 
   /**
-   * Acquire N bytes of memory for execution, evicting cached blocks if necessary.
+   * Try to acquire up to `numBytes` of execution memory for the current task and return the
+   * number of bytes obtained, or 0 if none can be allocated.
    *
-   * This method evicts blocks only up to the amount of memory borrowed by storage.
-   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
-   * @return number of bytes successfully granted (<= N).
+   * This call may block until there is enough free memory in some situations, to make sure each
+   * task has a chance to ramp up to at least 1 / 2N of the total memory pool (where N is the # of
+   * active tasks) before it is forced to spill. This can happen if the number of tasks increase
+   * but an older task had a lot of memory already.
    */
-  private[memory] override def doAcquireExecutionMemory(
+  override private[memory] def acquireExecutionMemory(
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
+      taskAttemptId: Long,
+      memoryMode: MemoryMode): Long = synchronized {
+    assert(onHeapExecutionMemoryPool.poolSize + storageMemoryPool.poolSize == maxMemory)
     assert(numBytes >= 0)
-    val memoryBorrowedByStorage = math.max(0, _storageMemoryUsed - storageRegionSize)
-    // If there is not enough free memory AND storage has borrowed some execution memory,
-    // then evict as much memory borrowed by storage as needed to grant this request
-    val shouldEvictStorage = totalFreeMemory < numBytes && memoryBorrowedByStorage > 0
-    if (shouldEvictStorage) {
-      val spaceToEnsure = math.min(numBytes, memoryBorrowedByStorage)
-      memoryStore.ensureFreeSpace(spaceToEnsure, evictedBlocks)
+    memoryMode match {
+      case MemoryMode.ON_HEAP =>
+        if (numBytes > onHeapExecutionMemoryPool.memoryFree) {
+          val extraMemoryNeeded = numBytes - onHeapExecutionMemoryPool.memoryFree
+          // There is not enough free memory in the execution pool, so try to reclaim memory from
+          // storage. We can reclaim any free memory from the storage pool. If the storage pool
+          // has grown to become larger than `storageRegionSize`, we can evict blocks and reclaim
+          // the memory that storage has borrowed from execution.
+          val memoryReclaimableFromStorage =
+            math.max(storageMemoryPool.memoryFree, storageMemoryPool.poolSize - storageRegionSize)
+          if (memoryReclaimableFromStorage > 0) {
+            // Only reclaim as much space as is necessary and available:
+            val spaceReclaimed = storageMemoryPool.shrinkPoolToFreeSpace(
+              math.min(extraMemoryNeeded, memoryReclaimableFromStorage))
+            onHeapExecutionMemoryPool.incrementPoolSize(spaceReclaimed)
+          }
+        }
+        onHeapExecutionMemoryPool.acquireMemory(numBytes, taskAttemptId)
+      case MemoryMode.OFF_HEAP =>
+        // For now, we only support on-heap caching of data, so we do not need to interact with
+        // the storage pool when allocating off-heap memory. This will change in the future, though.
+        super.acquireExecutionMemory(numBytes, taskAttemptId, memoryMode)
     }
-    val bytesToGrant = math.min(numBytes, totalFreeMemory)
-    _executionMemoryUsed += bytesToGrant
-    bytesToGrant
   }
 
-  /**
-   * Acquire N bytes of memory to cache the given block, evicting existing ones if necessary.
-   * Blocks evicted in the process, if any, are added to `evictedBlocks`.
-   * @return whether all N bytes were successfully granted.
-   */
   override def acquireStorageMemory(
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    assert(onHeapExecutionMemoryPool.poolSize + storageMemoryPool.poolSize == maxMemory)
     assert(numBytes >= 0)
-    memoryStore.ensureFreeSpace(blockId, numBytes, evictedBlocks)
-    val enoughMemory = totalFreeMemory >= numBytes
-    if (enoughMemory) {
-      _storageMemoryUsed += numBytes
+    if (numBytes > storageMemoryPool.memoryFree) {
+      // There is not enough free memory in the storage pool, so try to borrow free memory from
+      // the execution pool.
+      val memoryBorrowedFromExecution = Math.min(onHeapExecutionMemoryPool.memoryFree, numBytes)
+      onHeapExecutionMemoryPool.decrementPoolSize(memoryBorrowedFromExecution)
+      storageMemoryPool.incrementPoolSize(memoryBorrowedFromExecution)
     }
-    enoughMemory
+    storageMemoryPool.acquireMemory(blockId, numBytes, evictedBlocks)
   }
 
+  override def acquireUnrollMemory(
+      blockId: BlockId,
+      numBytes: Long,
+      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = synchronized {
+    acquireStorageMemory(blockId, numBytes, evictedBlocks)
+  }
 }
 
-private object UnifiedMemoryManager {
+object UnifiedMemoryManager {
+
+  def apply(conf: SparkConf, numCores: Int): UnifiedMemoryManager = {
+    val maxMemory = getMaxMemory(conf)
+    new UnifiedMemoryManager(
+      conf,
+      maxMemory = maxMemory,
+      storageRegionSize =
+        (maxMemory * conf.getDouble("spark.memory.storageFraction", 0.5)).toLong,
+      numCores = numCores)
+  }
 
   /**
    * Return the total amount of memory shared between execution and storage, in bytes.
diff --git a/core/src/main/scala/org/apache/spark/memory/package.scala b/core/src/main/scala/org/apache/spark/memory/package.scala
new file mode 100644
index 000000000000..564e30d2ffd6
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/memory/package.scala
@@ -0,0 +1,75 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark
+
+/**
+ * This package implements Spark's memory management system. This system consists of two main
+ * components, a JVM-wide memory manager and a per-task manager:
+ *
+ * - [[org.apache.spark.memory.MemoryManager]] manages Spark's overall memory usage within a JVM.
+ *   This component implements the policies for dividing the available memory across tasks and for
+ *   allocating memory between storage (memory used caching and data transfer) and execution (memory
+ *   used by computations, such as shuffles, joins, sorts, and aggregations).
+ * - [[org.apache.spark.memory.TaskMemoryManager]] manages the memory allocated by individual tasks.
+ *   Tasks interact with TaskMemoryManager and never directly interact with the JVM-wide
+ *   MemoryManager.
+ *
+ * Internally, each of these components have additional abstractions for memory bookkeeping:
+ *
+ *  - [[org.apache.spark.memory.MemoryConsumer]]s are clients of the TaskMemoryManager and
+ *    correspond to individual operators and data structures within a task. The TaskMemoryManager
+ *    receives memory allocation requests from MemoryConsumers and issues callbacks to consumers
+ *    in order to trigger spilling when running low on memory.
+ *  - [[org.apache.spark.memory.MemoryPool]]s are a bookkeeping abstraction used by the
+ *    MemoryManager to track the division of memory between storage and execution.
+ *
+ * Diagrammatically:
+ *
+ * {{{
+ *       +-------------+
+ *       | MemConsumer |----+                                   +------------------------+
+ *       +-------------+    |    +-------------------+          |     MemoryManager      |
+ *                          +--->| TaskMemoryManager |----+     |                        |
+ *       +-------------+    |    +-------------------+    |     |  +------------------+  |
+ *       | MemConsumer |----+                             |     |  |  StorageMemPool  |  |
+ *       +-------------+         +-------------------+    |     |  +------------------+  |
+ *                               | TaskMemoryManager |----+     |                        |
+ *                               +-------------------+    |     |  +------------------+  |
+ *                                                        +---->|  |OnHeapExecMemPool |  |
+ *                                        *               |     |  +------------------+  |
+ *                                        *               |     |                        |
+ *       +-------------+                  *               |     |  +------------------+  |
+ *       | MemConsumer |----+                             |     |  |OffHeapExecMemPool|  |
+ *       +-------------+    |    +-------------------+    |     |  +------------------+  |
+ *                          +--->| TaskMemoryManager |----+     |                        |
+ *                               +-------------------+          +------------------------+
+ * }}}
+ *
+ *
+ * There are two implementations of [[org.apache.spark.memory.MemoryManager]] which vary in how
+ * they handle the sizing of their memory pools:
+ *
+ *  - [[org.apache.spark.memory.UnifiedMemoryManager]], the default in Spark 1.6+, enforces soft
+ *    boundaries between storage and execution memory, allowing requests for memory in one region
+ *    to be fulfilled by borrowing memory from the other.
+ *  - [[org.apache.spark.memory.StaticMemoryManager]] enforces hard boundaries between storage
+ *    and execution memory by statically partitioning Spark's memory and preventing storage and
+ *    execution from borrowing memory from each other. This mode is retained only for legacy
+ *    compatibility purposes.
+ */
+package object memory
diff --git a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
index 9e002621a690..3a48af82b1da 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/Spillable.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.util.collection
 
-import org.apache.spark.memory.TaskMemoryManager
+import org.apache.spark.memory.{MemoryMode, TaskMemoryManager}
 import org.apache.spark.{Logging, SparkEnv}
 
 /**
@@ -78,7 +78,8 @@ private[spark] trait Spillable[C] extends Logging {
     if (elementsRead % 32 == 0 && currentMemory >= myMemoryThreshold) {
       // Claim up to double our current memory from the shuffle memory pool
       val amountToRequest = 2 * currentMemory - myMemoryThreshold
-      val granted = taskMemoryManager.acquireExecutionMemory(amountToRequest, null)
+      val granted =
+        taskMemoryManager.acquireExecutionMemory(amountToRequest, MemoryMode.ON_HEAP, null)
       myMemoryThreshold += granted
       // If we were granted too little memory to grow further (either tryToAcquire returned 0,
       // or we already had more memory than myMemoryThreshold), spill the current collection
@@ -107,7 +108,8 @@ private[spark] trait Spillable[C] extends Logging {
    */
   def releaseMemory(): Unit = {
     // The amount we requested does not include the initial memory tracking threshold
-    taskMemoryManager.releaseExecutionMemory(myMemoryThreshold - initialMemoryThreshold, null)
+    taskMemoryManager.releaseExecutionMemory(
+      myMemoryThreshold - initialMemoryThreshold, MemoryMode.ON_HEAP, null)
     myMemoryThreshold = initialMemoryThreshold
   }
 
diff --git a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
index c73131739561..711eed0193bc 100644
--- a/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
+++ b/core/src/test/java/org/apache/spark/memory/TaskMemoryManagerSuite.java
@@ -28,8 +28,14 @@ public class TaskMemoryManagerSuite {
   @Test
   public void leakedPageMemoryIsDetected() {
     final TaskMemoryManager manager = new TaskMemoryManager(
-      new TestMemoryManager(new SparkConf().set("spark.unsafe.offHeap", "false")), 0);
+      new StaticMemoryManager(
+        new SparkConf().set("spark.unsafe.offHeap", "false"),
+        Long.MAX_VALUE,
+        Long.MAX_VALUE,
+        1),
+      0);
     manager.allocatePage(4096, null);  // leak memory
+    Assert.assertEquals(4096, manager.getMemoryConsumptionForThisTask());
     Assert.assertEquals(4096, manager.cleanUpAllAllocatedMemory());
   }
 
diff --git a/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java b/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java
index 8ae364273850..e6e16fff8040 100644
--- a/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java
+++ b/core/src/test/java/org/apache/spark/memory/TestMemoryConsumer.java
@@ -32,13 +32,19 @@ public long spill(long size, MemoryConsumer trigger) throws IOException {
   }
 
   void use(long size) {
-    long got = taskMemoryManager.acquireExecutionMemory(size, this);
+    long got = taskMemoryManager.acquireExecutionMemory(
+      size,
+      taskMemoryManager.tungstenMemoryMode,
+      this);
     used += got;
   }
 
   void free(long size) {
     used -= size;
-    taskMemoryManager.releaseExecutionMemory(size, this);
+    taskMemoryManager.releaseExecutionMemory(
+      size,
+      taskMemoryManager.tungstenMemoryMode,
+      this);
   }
 }
 
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
index 4763395d7d40..0e0eca515afc 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
@@ -423,7 +423,7 @@ public void writeEnoughRecordsToTriggerSortBufferExpansionAndSpill() throws Exce
     memoryManager.limit(UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE * 16);
     final UnsafeShuffleWriter<Object, Object> writer = createWriter(false);
     final ArrayList<Product2<Object, Object>> dataToWrite = new ArrayList<>();
-    for (int i = 0; i < UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE; i++) {
+    for (int i = 0; i < UnsafeShuffleWriter.INITIAL_SORT_BUFFER_SIZE + 1; i++) {
       dataToWrite.add(new Tuple2<Object, Object>(i, i));
     }
     writer.write(dataToWrite.iterator());
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
index 92bd45e5fa24..3bca790f3087 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
@@ -83,7 +83,9 @@ public OutputStream apply(OutputStream stream) {
   public void setup() {
     memoryManager =
       new TestMemoryManager(
-        new SparkConf().set("spark.unsafe.offHeap", "" + useOffHeapMemoryAllocator()));
+        new SparkConf()
+          .set("spark.unsafe.offHeap", "" + useOffHeapMemoryAllocator())
+          .set("spark.memory.offHeapSize", "256mb"));
     taskMemoryManager = new TaskMemoryManager(memoryManager, 0);
 
     tempDir = Utils.createTempDir(System.getProperty("java.io.tmpdir"), "unsafe-test");
diff --git a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
index 4a9479cf490f..f55d435fa33a 100644
--- a/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/MemoryManagerSuite.scala
@@ -19,6 +19,7 @@ package org.apache.spark.memory
 
 import java.util.concurrent.atomic.AtomicLong
 
+import scala.collection.mutable
 import scala.concurrent.duration.Duration
 import scala.concurrent.{Await, ExecutionContext, Future}
 
@@ -29,7 +30,7 @@ import org.mockito.stubbing.Answer
 import org.scalatest.time.SpanSugar._
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.storage.MemoryStore
+import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, StorageLevel}
 
 
 /**
@@ -78,7 +79,12 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
         require(args(numBytesPos).isInstanceOf[Long], s"bad test: expected ensureFreeSpace " +
           s"argument at index $numBytesPos to be a Long: ${args.mkString(", ")}")
         val numBytes = args(numBytesPos).asInstanceOf[Long]
-        mockEnsureFreeSpace(mm, numBytes)
+        val success = mockEnsureFreeSpace(mm, numBytes)
+        if (success) {
+          args.last.asInstanceOf[mutable.Buffer[(BlockId, BlockStatus)]].append(
+            (null, BlockStatus(StorageLevel.MEMORY_ONLY, numBytes, 0L, 0L)))
+        }
+        success
       }
     }
   }
@@ -132,93 +138,95 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
   }
 
   /**
-   * Create a MemoryManager with the specified execution memory limit and no storage memory.
+   * Create a MemoryManager with the specified execution memory limits and no storage memory.
    */
-  protected def createMemoryManager(maxExecutionMemory: Long): MemoryManager
+  protected def createMemoryManager(
+     maxOnHeapExecutionMemory: Long,
+     maxOffHeapExecutionMemory: Long = 0L): MemoryManager
 
   // -- Tests of sharing of execution memory between tasks ----------------------------------------
   // Prior to Spark 1.6, these tests were part of ShuffleMemoryManagerSuite.
 
   implicit val ec = ExecutionContext.global
 
-  test("single task requesting execution memory") {
+  test("single task requesting on-heap execution memory") {
     val manager = createMemoryManager(1000L)
     val taskMemoryManager = new TaskMemoryManager(manager, 0)
 
-    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 100L)
-    assert(taskMemoryManager.acquireExecutionMemory(400L, null) === 400L)
-    assert(taskMemoryManager.acquireExecutionMemory(400L, null) === 400L)
-    assert(taskMemoryManager.acquireExecutionMemory(200L, null) === 100L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, MemoryMode.ON_HEAP, null) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L, MemoryMode.ON_HEAP, null) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(400L, MemoryMode.ON_HEAP, null) === 400L)
+    assert(taskMemoryManager.acquireExecutionMemory(200L, MemoryMode.ON_HEAP, null) === 100L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, MemoryMode.ON_HEAP, null) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, MemoryMode.ON_HEAP, null) === 0L)
 
-    taskMemoryManager.releaseExecutionMemory(500L, null)
-    assert(taskMemoryManager.acquireExecutionMemory(300L, null) === 300L)
-    assert(taskMemoryManager.acquireExecutionMemory(300L, null) === 200L)
+    taskMemoryManager.releaseExecutionMemory(500L, MemoryMode.ON_HEAP, null)
+    assert(taskMemoryManager.acquireExecutionMemory(300L, MemoryMode.ON_HEAP, null) === 300L)
+    assert(taskMemoryManager.acquireExecutionMemory(300L, MemoryMode.ON_HEAP, null) === 200L)
 
     taskMemoryManager.cleanUpAllAllocatedMemory()
-    assert(taskMemoryManager.acquireExecutionMemory(1000L, null) === 1000L)
-    assert(taskMemoryManager.acquireExecutionMemory(100L, null) === 0L)
+    assert(taskMemoryManager.acquireExecutionMemory(1000L, MemoryMode.ON_HEAP, null) === 1000L)
+    assert(taskMemoryManager.acquireExecutionMemory(100L, MemoryMode.ON_HEAP, null) === 0L)
   }
 
-  test("two tasks requesting full execution memory") {
+  test("two tasks requesting full on-heap execution memory") {
     val memoryManager = createMemoryManager(1000L)
     val t1MemManager = new TaskMemoryManager(memoryManager, 1)
     val t2MemManager = new TaskMemoryManager(memoryManager, 2)
     val futureTimeout: Duration = 20.seconds
 
     // Have both tasks request 500 bytes, then wait until both requests have been granted:
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result1, futureTimeout) === 500L)
     assert(Await.result(t2Result1, futureTimeout) === 500L)
 
     // Have both tasks each request 500 bytes more; both should immediately return 0 as they are
     // both now at 1 / N
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result2, 200.millis) === 0L)
     assert(Await.result(t2Result2, 200.millis) === 0L)
   }
 
-  test("two tasks cannot grow past 1 / N of execution memory") {
+  test("two tasks cannot grow past 1 / N of on-heap execution memory") {
     val memoryManager = createMemoryManager(1000L)
     val t1MemManager = new TaskMemoryManager(memoryManager, 1)
     val t2MemManager = new TaskMemoryManager(memoryManager, 2)
     val futureTimeout: Duration = 20.seconds
 
     // Have both tasks request 250 bytes, then wait until both requests have been granted:
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(250L, null) }
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, null) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(250L, MemoryMode.ON_HEAP, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result1, futureTimeout) === 250L)
     assert(Await.result(t2Result1, futureTimeout) === 250L)
 
     // Have both tasks each request 500 bytes more.
     // We should only grant 250 bytes to each of them on this second request
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, null) }
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result2, futureTimeout) === 250L)
     assert(Await.result(t2Result2, futureTimeout) === 250L)
   }
 
-  test("tasks can block to get at least 1 / 2N of execution memory") {
+  test("tasks can block to get at least 1 / 2N of on-heap execution memory") {
     val memoryManager = createMemoryManager(1000L)
     val t1MemManager = new TaskMemoryManager(memoryManager, 1)
     val t2MemManager = new TaskMemoryManager(memoryManager, 2)
     val futureTimeout: Duration = 20.seconds
 
     // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, null) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result1, futureTimeout) === 1000L)
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(250L, MemoryMode.ON_HEAP, null) }
     // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
     // to make sure the other thread blocks for some time otherwise.
     Thread.sleep(300)
-    t1MemManager.releaseExecutionMemory(250L, null)
+    t1MemManager.releaseExecutionMemory(250L, MemoryMode.ON_HEAP, null)
     // The memory freed from t1 should now be granted to t2.
     assert(Await.result(t2Result1, futureTimeout) === 250L)
     // Further requests by t2 should be denied immediately because it now has 1 / 2N of the memory.
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(100L, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(100L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t2Result2, 200.millis) === 0L)
   }
 
@@ -229,18 +237,18 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val futureTimeout: Duration = 20.seconds
 
     // t1 grabs 1000 bytes and then waits until t2 is ready to make a request.
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, null) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(1000L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result1, futureTimeout) === 1000L)
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     // Make sure that t2 didn't grab the memory right away. This is hacky but it would be difficult
     // to make sure the other thread blocks for some time otherwise.
     Thread.sleep(300)
     // t1 releases all of its memory, so t2 should be able to grab all of the memory
     t1MemManager.cleanUpAllAllocatedMemory()
     assert(Await.result(t2Result1, futureTimeout) === 500L)
-    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result2 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t2Result2, futureTimeout) === 500L)
-    val t2Result3 = Future { t2MemManager.acquireExecutionMemory(500L, null) }
+    val t2Result3 = Future { t2MemManager.acquireExecutionMemory(500L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t2Result3, 200.millis) === 0L)
   }
 
@@ -251,15 +259,35 @@ private[memory] trait MemoryManagerSuite extends SparkFunSuite {
     val t2MemManager = new TaskMemoryManager(memoryManager, 2)
     val futureTimeout: Duration = 20.seconds
 
-    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(700L, null) }
+    val t1Result1 = Future { t1MemManager.acquireExecutionMemory(700L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result1, futureTimeout) === 700L)
 
-    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(300L, null) }
+    val t2Result1 = Future { t2MemManager.acquireExecutionMemory(300L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t2Result1, futureTimeout) === 300L)
 
-    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(300L, null) }
+    val t1Result2 = Future { t1MemManager.acquireExecutionMemory(300L, MemoryMode.ON_HEAP, null) }
     assert(Await.result(t1Result2, 200.millis) === 0L)
   }
+
+  test("off-heap execution allocations cannot exceed limit") {
+    val memoryManager = createMemoryManager(
+      maxOnHeapExecutionMemory = 0L,
+      maxOffHeapExecutionMemory = 1000L)
+
+    val tMemManager = new TaskMemoryManager(memoryManager, 1)
+    val result1 = Future { tMemManager.acquireExecutionMemory(1000L, MemoryMode.OFF_HEAP, null) }
+    assert(Await.result(result1, 200.millis) === 1000L)
+    assert(tMemManager.getMemoryConsumptionForThisTask === 1000L)
+
+    val result2 = Future { tMemManager.acquireExecutionMemory(300L, MemoryMode.OFF_HEAP, null) }
+    assert(Await.result(result2, 200.millis) === 0L)
+
+    assert(tMemManager.getMemoryConsumptionForThisTask === 1000L)
+    tMemManager.releaseExecutionMemory(500L, MemoryMode.OFF_HEAP, null)
+    assert(tMemManager.getMemoryConsumptionForThisTask === 500L)
+    tMemManager.releaseExecutionMemory(500L, MemoryMode.OFF_HEAP, null)
+    assert(tMemManager.getMemoryConsumptionForThisTask === 0L)
+  }
 }
 
 private object MemoryManagerSuite {
diff --git a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
index 885c450d6d4f..54cb28c389c2 100644
--- a/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/StaticMemoryManagerSuite.scala
@@ -24,7 +24,6 @@ import org.mockito.Mockito.when
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, TestBlockId}
 
-
 class StaticMemoryManagerSuite extends MemoryManagerSuite {
   private val conf = new SparkConf().set("spark.storage.unrollFraction", "0.4")
   private val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
@@ -36,38 +35,47 @@ class StaticMemoryManagerSuite extends MemoryManagerSuite {
       maxExecutionMem: Long,
       maxStorageMem: Long): (StaticMemoryManager, MemoryStore) = {
     val mm = new StaticMemoryManager(
-      conf, maxExecutionMemory = maxExecutionMem, maxStorageMemory = maxStorageMem, numCores = 1)
+      conf,
+      maxOnHeapExecutionMemory = maxExecutionMem,
+      maxStorageMemory = maxStorageMem,
+      numCores = 1)
     val ms = makeMemoryStore(mm)
     (mm, ms)
   }
 
-  override protected def createMemoryManager(maxMemory: Long): MemoryManager = {
+  override protected def createMemoryManager(
+      maxOnHeapExecutionMemory: Long,
+      maxOffHeapExecutionMemory: Long): StaticMemoryManager = {
     new StaticMemoryManager(
-      conf,
-      maxExecutionMemory = maxMemory,
+      conf.clone
+        .set("spark.memory.fraction", "1")
+        .set("spark.testing.memory", maxOnHeapExecutionMemory.toString)
+        .set("spark.memory.offHeapSize", maxOffHeapExecutionMemory.toString),
+      maxOnHeapExecutionMemory = maxOnHeapExecutionMemory,
       maxStorageMemory = 0,
       numCores = 1)
   }
 
   test("basic execution memory") {
     val maxExecutionMem = 1000L
+    val taskAttemptId = 0L
     val (mm, _) = makeThings(maxExecutionMem, Long.MaxValue)
     assert(mm.executionMemoryUsed === 0L)
-    assert(mm.doAcquireExecutionMemory(10L, evictedBlocks) === 10L)
+    assert(mm.acquireExecutionMemory(10L, taskAttemptId, MemoryMode.ON_HEAP) === 10L)
     assert(mm.executionMemoryUsed === 10L)
-    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.acquireExecutionMemory(100L, taskAttemptId, MemoryMode.ON_HEAP) === 100L)
     // Acquire up to the max
-    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 890L)
+    assert(mm.acquireExecutionMemory(1000L, taskAttemptId, MemoryMode.ON_HEAP) === 890L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
-    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 0L)
+    assert(mm.acquireExecutionMemory(1L, taskAttemptId, MemoryMode.ON_HEAP) === 0L)
     assert(mm.executionMemoryUsed === maxExecutionMem)
-    mm.releaseExecutionMemory(800L)
+    mm.releaseExecutionMemory(800L, taskAttemptId, MemoryMode.ON_HEAP)
     assert(mm.executionMemoryUsed === 200L)
     // Acquire after release
-    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 1L)
+    assert(mm.acquireExecutionMemory(1L, taskAttemptId, MemoryMode.ON_HEAP) === 1L)
     assert(mm.executionMemoryUsed === 201L)
     // Release beyond what was acquired
-    mm.releaseExecutionMemory(maxExecutionMem)
+    mm.releaseExecutionMemory(maxExecutionMem, taskAttemptId, MemoryMode.ON_HEAP)
     assert(mm.executionMemoryUsed === 0L)
   }
 
@@ -113,13 +121,14 @@ class StaticMemoryManagerSuite extends MemoryManagerSuite {
   test("execution and storage isolation") {
     val maxExecutionMem = 200L
     val maxStorageMem = 1000L
+    val taskAttemptId = 0L
     val dummyBlock = TestBlockId("ain't nobody love like you do")
     val (mm, ms) = makeThings(maxExecutionMem, maxStorageMem)
     // Only execution memory should increase
-    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.acquireExecutionMemory(100L, taskAttemptId, MemoryMode.ON_HEAP) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 100L)
-    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 100L)
+    assert(mm.acquireExecutionMemory(1000L, taskAttemptId, MemoryMode.ON_HEAP) === 100L)
     assert(mm.storageMemoryUsed === 0L)
     assert(mm.executionMemoryUsed === 200L)
     // Only storage memory should increase
@@ -128,7 +137,7 @@ class StaticMemoryManagerSuite extends MemoryManagerSuite {
     assert(mm.storageMemoryUsed === 50L)
     assert(mm.executionMemoryUsed === 200L)
     // Only execution memory should be released
-    mm.releaseExecutionMemory(133L)
+    mm.releaseExecutionMemory(133L, taskAttemptId, MemoryMode.ON_HEAP)
     assert(mm.storageMemoryUsed === 50L)
     assert(mm.executionMemoryUsed === 67L)
     // Only storage memory should be released
diff --git a/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala b/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
index 77e43554ee27..0706a6e45de8 100644
--- a/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
+++ b/core/src/test/scala/org/apache/spark/memory/TestMemoryManager.scala
@@ -22,19 +22,20 @@ import scala.collection.mutable
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockStatus, BlockId}
 
-class TestMemoryManager(conf: SparkConf) extends MemoryManager(conf, numCores = 1) {
-  private[memory] override def doAcquireExecutionMemory(
+class TestMemoryManager(conf: SparkConf)
+  extends MemoryManager(conf, numCores = 1, Long.MaxValue, Long.MaxValue) {
+
+  override private[memory] def acquireExecutionMemory(
       numBytes: Long,
-      evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Long = synchronized {
+      taskAttemptId: Long,
+      memoryMode: MemoryMode): Long = {
     if (oomOnce) {
       oomOnce = false
       0
     } else if (available >= numBytes) {
-      _executionMemoryUsed += numBytes // To suppress warnings when freeing unallocated memory
       available -= numBytes
       numBytes
     } else {
-      _executionMemoryUsed += available
       val grant = available
       available = 0
       grant
@@ -48,12 +49,13 @@ class TestMemoryManager(conf: SparkConf) extends MemoryManager(conf, numCores =
       blockId: BlockId,
       numBytes: Long,
       evictedBlocks: mutable.Buffer[(BlockId, BlockStatus)]): Boolean = true
-  override def releaseExecutionMemory(numBytes: Long): Unit = {
+  override def releaseStorageMemory(numBytes: Long): Unit = {}
+  override private[memory] def releaseExecutionMemory(
+      numBytes: Long,
+      taskAttemptId: Long,
+      memoryMode: MemoryMode): Unit = {
     available += numBytes
-    _executionMemoryUsed -= numBytes
   }
-  override def releaseStorageMemory(numBytes: Long): Unit = {}
-  override def maxExecutionMemory: Long = Long.MaxValue
   override def maxStorageMemory: Long = Long.MaxValue
 
   private var oomOnce = false
diff --git a/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
index 0c97f2bd8965..8cebe81c3bff 100644
--- a/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/memory/UnifiedMemoryManagerSuite.scala
@@ -24,57 +24,52 @@ import org.scalatest.PrivateMethodTester
 import org.apache.spark.SparkConf
 import org.apache.spark.storage.{BlockId, BlockStatus, MemoryStore, TestBlockId}
 
-
 class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTester {
-  private val conf = new SparkConf().set("spark.memory.storageFraction", "0.5")
   private val dummyBlock = TestBlockId("--")
   private val evictedBlocks = new ArrayBuffer[(BlockId, BlockStatus)]
 
+  private val storageFraction: Double = 0.5
+
   /**
    * Make a [[UnifiedMemoryManager]] and a [[MemoryStore]] with limited class dependencies.
    */
   private def makeThings(maxMemory: Long): (UnifiedMemoryManager, MemoryStore) = {
-    val mm = new UnifiedMemoryManager(conf, maxMemory, numCores = 1)
+    val mm = createMemoryManager(maxMemory)
     val ms = makeMemoryStore(mm)
     (mm, ms)
   }
 
-  override protected def createMemoryManager(maxMemory: Long): MemoryManager = {
-    new UnifiedMemoryManager(conf, maxMemory, numCores = 1)
-  }
-
-  private def getStorageRegionSize(mm: UnifiedMemoryManager): Long = {
-    mm invokePrivate PrivateMethod[Long]('storageRegionSize)()
-  }
-
-  test("storage region size") {
-    val maxMemory = 1000L
-    val (mm, _) = makeThings(maxMemory)
-    val storageFraction = conf.get("spark.memory.storageFraction").toDouble
-    val expectedStorageRegionSize = maxMemory * storageFraction
-    val actualStorageRegionSize = getStorageRegionSize(mm)
-    assert(expectedStorageRegionSize === actualStorageRegionSize)
+  override protected def createMemoryManager(
+      maxOnHeapExecutionMemory: Long,
+      maxOffHeapExecutionMemory: Long): UnifiedMemoryManager = {
+    val conf = new SparkConf()
+      .set("spark.memory.fraction", "1")
+      .set("spark.testing.memory", maxOnHeapExecutionMemory.toString)
+      .set("spark.memory.offHeapSize", maxOffHeapExecutionMemory.toString)
+      .set("spark.memory.storageFraction", storageFraction.toString)
+    UnifiedMemoryManager(conf, numCores = 1)
   }
 
   test("basic execution memory") {
     val maxMemory = 1000L
+    val taskAttemptId = 0L
     val (mm, _) = makeThings(maxMemory)
     assert(mm.executionMemoryUsed === 0L)
-    assert(mm.doAcquireExecutionMemory(10L, evictedBlocks) === 10L)
+    assert(mm.acquireExecutionMemory(10L, taskAttemptId, MemoryMode.ON_HEAP) === 10L)
     assert(mm.executionMemoryUsed === 10L)
-    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.acquireExecutionMemory(100L, taskAttemptId, MemoryMode.ON_HEAP) === 100L)
     // Acquire up to the max
-    assert(mm.doAcquireExecutionMemory(1000L, evictedBlocks) === 890L)
+    assert(mm.acquireExecutionMemory(1000L, taskAttemptId, MemoryMode.ON_HEAP) === 890L)
     assert(mm.executionMemoryUsed === maxMemory)
-    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 0L)
+    assert(mm.acquireExecutionMemory(1L, taskAttemptId, MemoryMode.ON_HEAP) === 0L)
     assert(mm.executionMemoryUsed === maxMemory)
-    mm.releaseExecutionMemory(800L)
+    mm.releaseExecutionMemory(800L, taskAttemptId, MemoryMode.ON_HEAP)
     assert(mm.executionMemoryUsed === 200L)
     // Acquire after release
-    assert(mm.doAcquireExecutionMemory(1L, evictedBlocks) === 1L)
+    assert(mm.acquireExecutionMemory(1L, taskAttemptId, MemoryMode.ON_HEAP) === 1L)
     assert(mm.executionMemoryUsed === 201L)
     // Release beyond what was acquired
-    mm.releaseExecutionMemory(maxMemory)
+    mm.releaseExecutionMemory(maxMemory, taskAttemptId, MemoryMode.ON_HEAP)
     assert(mm.executionMemoryUsed === 0L)
   }
 
@@ -118,44 +113,34 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
 
   test("execution evicts storage") {
     val maxMemory = 1000L
+    val taskAttemptId = 0L
     val (mm, ms) = makeThings(maxMemory)
-    // First, ensure the test classes are set up as expected
-    val expectedStorageRegionSize = 500L
-    val expectedExecutionRegionSize = 500L
-    val storageRegionSize = getStorageRegionSize(mm)
-    val executionRegionSize = maxMemory - expectedStorageRegionSize
-    require(storageRegionSize === expectedStorageRegionSize,
-      "bad test: storage region size is unexpected")
-    require(executionRegionSize === expectedExecutionRegionSize,
-      "bad test: storage region size is unexpected")
     // Acquire enough storage memory to exceed the storage region
     assert(mm.acquireStorageMemory(dummyBlock, 750L, evictedBlocks))
     assertEnsureFreeSpaceCalled(ms, 750L)
     assert(mm.executionMemoryUsed === 0L)
     assert(mm.storageMemoryUsed === 750L)
-    require(mm.storageMemoryUsed > storageRegionSize,
-      s"bad test: storage memory used should exceed the storage region")
     // Execution needs to request 250 bytes to evict storage memory
-    assert(mm.doAcquireExecutionMemory(100L, evictedBlocks) === 100L)
+    assert(mm.acquireExecutionMemory(100L, taskAttemptId, MemoryMode.ON_HEAP) === 100L)
     assert(mm.executionMemoryUsed === 100L)
     assert(mm.storageMemoryUsed === 750L)
     assertEnsureFreeSpaceNotCalled(ms)
     // Execution wants 200 bytes but only 150 are free, so storage is evicted
-    assert(mm.doAcquireExecutionMemory(200L, evictedBlocks) === 200L)
-    assertEnsureFreeSpaceCalled(ms, 200L)
+    assert(mm.acquireExecutionMemory(200L, taskAttemptId, MemoryMode.ON_HEAP) === 200L)
+    assert(mm.executionMemoryUsed === 300L)
+    assertEnsureFreeSpaceCalled(ms, 50L)
     assert(mm.executionMemoryUsed === 300L)
     mm.releaseAllStorageMemory()
-    require(mm.executionMemoryUsed < executionRegionSize,
-      s"bad test: execution memory used should be within the execution region")
+    require(mm.executionMemoryUsed === 300L)
     require(mm.storageMemoryUsed === 0, "bad test: all storage memory should have been released")
     // Acquire some storage memory again, but this time keep it within the storage region
     assert(mm.acquireStorageMemory(dummyBlock, 400L, evictedBlocks))
     assertEnsureFreeSpaceCalled(ms, 400L)
-    require(mm.storageMemoryUsed < storageRegionSize,
-      s"bad test: storage memory used should be within the storage region")
+    assert(mm.storageMemoryUsed === 400L)
+    assert(mm.executionMemoryUsed === 300L)
     // Execution cannot evict storage because the latter is within the storage fraction,
     // so grant only what's remaining without evicting anything, i.e. 1000 - 300 - 400 = 300
-    assert(mm.doAcquireExecutionMemory(400L, evictedBlocks) === 300L)
+    assert(mm.acquireExecutionMemory(400L, taskAttemptId, MemoryMode.ON_HEAP) === 300L)
     assert(mm.executionMemoryUsed === 600L)
     assert(mm.storageMemoryUsed === 400L)
     assertEnsureFreeSpaceNotCalled(ms)
@@ -163,23 +148,13 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
 
   test("storage does not evict execution") {
     val maxMemory = 1000L
+    val taskAttemptId = 0L
     val (mm, ms) = makeThings(maxMemory)
-    // First, ensure the test classes are set up as expected
-    val expectedStorageRegionSize = 500L
-    val expectedExecutionRegionSize = 500L
-    val storageRegionSize = getStorageRegionSize(mm)
-    val executionRegionSize = maxMemory - expectedStorageRegionSize
-    require(storageRegionSize === expectedStorageRegionSize,
-      "bad test: storage region size is unexpected")
-    require(executionRegionSize === expectedExecutionRegionSize,
-      "bad test: storage region size is unexpected")
     // Acquire enough execution memory to exceed the execution region
-    assert(mm.doAcquireExecutionMemory(800L, evictedBlocks) === 800L)
+    assert(mm.acquireExecutionMemory(800L, taskAttemptId, MemoryMode.ON_HEAP) === 800L)
     assert(mm.executionMemoryUsed === 800L)
     assert(mm.storageMemoryUsed === 0L)
     assertEnsureFreeSpaceNotCalled(ms)
-    require(mm.executionMemoryUsed > executionRegionSize,
-      s"bad test: execution memory used should exceed the execution region")
     // Storage should not be able to evict execution
     assert(mm.acquireStorageMemory(dummyBlock, 100L, evictedBlocks))
     assert(mm.executionMemoryUsed === 800L)
@@ -189,15 +164,13 @@ class UnifiedMemoryManagerSuite extends MemoryManagerSuite with PrivateMethodTes
     assert(mm.executionMemoryUsed === 800L)
     assert(mm.storageMemoryUsed === 100L)
     assertEnsureFreeSpaceCalled(ms, 250L)
-    mm.releaseExecutionMemory(maxMemory)
+    mm.releaseExecutionMemory(maxMemory, taskAttemptId, MemoryMode.ON_HEAP)
     mm.releaseStorageMemory(maxMemory)
     // Acquire some execution memory again, but this time keep it within the execution region
-    assert(mm.doAcquireExecutionMemory(200L, evictedBlocks) === 200L)
+    assert(mm.acquireExecutionMemory(200L, taskAttemptId, MemoryMode.ON_HEAP) === 200L)
     assert(mm.executionMemoryUsed === 200L)
     assert(mm.storageMemoryUsed === 0L)
     assertEnsureFreeSpaceNotCalled(ms)
-    require(mm.executionMemoryUsed < executionRegionSize,
-      s"bad test: execution memory used should be within the execution region")
     // Storage should still not be able to evict execution
     assert(mm.acquireStorageMemory(dummyBlock, 750L, evictedBlocks))
     assert(mm.executionMemoryUsed === 200L)
diff --git a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
index d49015afcd59..53991d8a1aed 100644
--- a/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/storage/BlockManagerSuite.scala
@@ -825,7 +825,7 @@ class BlockManagerSuite extends SparkFunSuite with Matchers with BeforeAndAfterE
     val transfer = new NettyBlockTransferService(conf, securityMgr, numCores = 1)
     val memoryManager = new StaticMemoryManager(
       conf,
-      maxExecutionMemory = Long.MaxValue,
+      maxOnHeapExecutionMemory = Long.MaxValue,
       maxStorageMemory = 1200,
       numCores = 1)
     store = new BlockManager(SparkContext.DRIVER_IDENTIFIER, rpcEnv, master,

From 7f741905b06ed6d3dfbff6db41a3355dab71aa3c Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Sat, 7 Nov 2015 05:35:53 +0100
Subject: [PATCH 548/896] [SPARK-11112] DAG visualization: display RDD callsite

<img width="548" alt="screen shot 2015-11-01 at 9 42 33 am" src="https://cloud.githubusercontent.com/assets/2133137/10870343/2a8cd070-807d-11e5-857a-4ebcace77b5b.png">
mateiz sarutak

Author: Andrew Or <andrew@databricks.com>

Closes #9398 from andrewor14/rdd-callsite.
---
 .../apache/spark/ui/static/spark-dag-viz.css  |  4 ++
 .../org/apache/spark/storage/RDDInfo.scala    | 16 +++++++-
 .../spark/ui/scope/RDDOperationGraph.scala    | 10 +++--
 .../org/apache/spark/util/JsonProtocol.scala  | 17 ++++++++-
 .../scala/org/apache/spark/util/Utils.scala   |  1 +
 .../org/apache/spark/ui/UISeleniumSuite.scala | 14 +++----
 .../apache/spark/util/JsonProtocolSuite.scala | 37 ++++++++++++++++---
 7 files changed, 79 insertions(+), 20 deletions(-)

diff --git a/core/src/main/resources/org/apache/spark/ui/static/spark-dag-viz.css b/core/src/main/resources/org/apache/spark/ui/static/spark-dag-viz.css
index 3b4ae2ed354b..9cc5c79f6734 100644
--- a/core/src/main/resources/org/apache/spark/ui/static/spark-dag-viz.css
+++ b/core/src/main/resources/org/apache/spark/ui/static/spark-dag-viz.css
@@ -122,3 +122,7 @@
   stroke: #52C366;
   stroke-width: 2px;
 }
+
+.tooltip-inner {
+  white-space: pre-wrap;
+}
diff --git a/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala b/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
index 96062626b504..3fa209b92417 100644
--- a/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
+++ b/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
@@ -19,7 +19,7 @@ package org.apache.spark.storage
 
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.rdd.{RDDOperationScope, RDD}
-import org.apache.spark.util.Utils
+import org.apache.spark.util.{CallSite, Utils}
 
 @DeveloperApi
 class RDDInfo(
@@ -28,9 +28,20 @@ class RDDInfo(
     val numPartitions: Int,
     var storageLevel: StorageLevel,
     val parentIds: Seq[Int],
+    val callSite: CallSite,
     val scope: Option[RDDOperationScope] = None)
   extends Ordered[RDDInfo] {
 
+  def this(
+      id: Int,
+      name: String,
+      numPartitions: Int,
+      storageLevel: StorageLevel,
+      parentIds: Seq[Int],
+      scope: Option[RDDOperationScope] = None) {
+    this(id, name, numPartitions, storageLevel, parentIds, CallSite.empty, scope)
+  }
+
   var numCachedPartitions = 0
   var memSize = 0L
   var diskSize = 0L
@@ -56,6 +67,7 @@ private[spark] object RDDInfo {
   def fromRdd(rdd: RDD[_]): RDDInfo = {
     val rddName = Option(rdd.name).getOrElse(Utils.getFormattedClassName(rdd))
     val parentIds = rdd.dependencies.map(_.rdd.id)
-    new RDDInfo(rdd.id, rddName, rdd.partitions.length, rdd.getStorageLevel, parentIds, rdd.scope)
+    new RDDInfo(rdd.id, rddName, rdd.partitions.length,
+      rdd.getStorageLevel, parentIds, rdd.creationSite, rdd.scope)
   }
 }
diff --git a/core/src/main/scala/org/apache/spark/ui/scope/RDDOperationGraph.scala b/core/src/main/scala/org/apache/spark/ui/scope/RDDOperationGraph.scala
index 81f168a447ea..24274562657b 100644
--- a/core/src/main/scala/org/apache/spark/ui/scope/RDDOperationGraph.scala
+++ b/core/src/main/scala/org/apache/spark/ui/scope/RDDOperationGraph.scala
@@ -23,6 +23,7 @@ import scala.collection.mutable.{StringBuilder, ListBuffer}
 import org.apache.spark.Logging
 import org.apache.spark.scheduler.StageInfo
 import org.apache.spark.storage.StorageLevel
+import org.apache.spark.util.CallSite
 
 /**
  * A representation of a generic cluster graph used for storing information on RDD operations.
@@ -38,7 +39,7 @@ private[ui] case class RDDOperationGraph(
     rootCluster: RDDOperationCluster)
 
 /** A node in an RDDOperationGraph. This represents an RDD. */
-private[ui] case class RDDOperationNode(id: Int, name: String, cached: Boolean)
+private[ui] case class RDDOperationNode(id: Int, name: String, cached: Boolean, callsite: CallSite)
 
 /**
  * A directed edge connecting two nodes in an RDDOperationGraph.
@@ -104,8 +105,8 @@ private[ui] object RDDOperationGraph extends Logging {
       edges ++= rdd.parentIds.map { parentId => RDDOperationEdge(parentId, rdd.id) }
 
       // TODO: differentiate between the intention to cache an RDD and whether it's actually cached
-      val node = nodes.getOrElseUpdate(
-        rdd.id, RDDOperationNode(rdd.id, rdd.name, rdd.storageLevel != StorageLevel.NONE))
+      val node = nodes.getOrElseUpdate(rdd.id, RDDOperationNode(
+        rdd.id, rdd.name, rdd.storageLevel != StorageLevel.NONE, rdd.callSite))
 
       if (rdd.scope.isEmpty) {
         // This RDD has no encompassing scope, so we put it directly in the root cluster
@@ -177,7 +178,8 @@ private[ui] object RDDOperationGraph extends Logging {
 
   /** Return the dot representation of a node in an RDDOperationGraph. */
   private def makeDotNode(node: RDDOperationNode): String = {
-    s"""${node.id} [label="${node.name} [${node.id}]"]"""
+    val label = s"${node.name} [${node.id}]\n${node.callsite.shortForm}"
+    s"""${node.id} [label="$label"]"""
   }
 
   /** Update the dot representation of the RDDOperationGraph in cluster to subgraph. */
diff --git a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
index ee2eb58cf5e2..c9beeb25e05a 100644
--- a/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
+++ b/core/src/main/scala/org/apache/spark/util/JsonProtocol.scala
@@ -398,6 +398,7 @@ private[spark] object JsonProtocol {
     ("RDD ID" -> rddInfo.id) ~
     ("Name" -> rddInfo.name) ~
     ("Scope" -> rddInfo.scope.map(_.toJson)) ~
+    ("Callsite" -> callsiteToJson(rddInfo.callSite)) ~
     ("Parent IDs" -> parentIds) ~
     ("Storage Level" -> storageLevel) ~
     ("Number of Partitions" -> rddInfo.numPartitions) ~
@@ -407,6 +408,11 @@ private[spark] object JsonProtocol {
     ("Disk Size" -> rddInfo.diskSize)
   }
 
+  def callsiteToJson(callsite: CallSite): JValue = {
+    ("Short Form" -> callsite.shortForm) ~
+    ("Long Form" -> callsite.longForm)
+  }
+
   def storageLevelToJson(storageLevel: StorageLevel): JValue = {
     ("Use Disk" -> storageLevel.useDisk) ~
     ("Use Memory" -> storageLevel.useMemory) ~
@@ -851,6 +857,9 @@ private[spark] object JsonProtocol {
     val scope = Utils.jsonOption(json \ "Scope")
       .map(_.extract[String])
       .map(RDDOperationScope.fromJson)
+    val callsite = Utils.jsonOption(json \ "Callsite")
+      .map(callsiteFromJson)
+      .getOrElse(CallSite.empty)
     val parentIds = Utils.jsonOption(json \ "Parent IDs")
       .map { l => l.extract[List[JValue]].map(_.extract[Int]) }
       .getOrElse(Seq.empty)
@@ -863,7 +872,7 @@ private[spark] object JsonProtocol {
       .getOrElse(json \ "Tachyon Size").extract[Long]
     val diskSize = (json \ "Disk Size").extract[Long]
 
-    val rddInfo = new RDDInfo(rddId, name, numPartitions, storageLevel, parentIds, scope)
+    val rddInfo = new RDDInfo(rddId, name, numPartitions, storageLevel, parentIds, callsite, scope)
     rddInfo.numCachedPartitions = numCachedPartitions
     rddInfo.memSize = memSize
     rddInfo.externalBlockStoreSize = externalBlockStoreSize
@@ -871,6 +880,12 @@ private[spark] object JsonProtocol {
     rddInfo
   }
 
+  def callsiteFromJson(json: JValue): CallSite = {
+    val shortForm = (json \ "Short Form").extract[String]
+    val longForm = (json \ "Long Form").extract[String]
+    CallSite(shortForm, longForm)
+  }
+
   def storageLevelFromJson(json: JValue): StorageLevel = {
     val useDisk = (json \ "Use Disk").extract[Boolean]
     val useMemory = (json \ "Use Memory").extract[Boolean]
diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 5a976ee839b1..316c194ff345 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -57,6 +57,7 @@ private[spark] case class CallSite(shortForm: String, longForm: String)
 private[spark] object CallSite {
   val SHORT_FORM = "callSite.short"
   val LONG_FORM = "callSite.long"
+  val empty = CallSite("", "")
 }
 
 /**
diff --git a/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala b/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
index 18eec7da9763..ceecfd665bf8 100644
--- a/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ui/UISeleniumSuite.scala
@@ -615,29 +615,29 @@ class UISeleniumSuite extends SparkFunSuite with WebBrowser with Matchers with B
       assert(stage0.contains("digraph G {\n  subgraph clusterstage_0 {\n    " +
         "label=&quot;Stage 0&quot;;\n    subgraph "))
       assert(stage0.contains("{\n      label=&quot;parallelize&quot;;\n      " +
-        "0 [label=&quot;ParallelCollectionRDD [0]&quot;];\n    }"))
+        "0 [label=&quot;ParallelCollectionRDD [0]"))
       assert(stage0.contains("{\n      label=&quot;map&quot;;\n      " +
-        "1 [label=&quot;MapPartitionsRDD [1]&quot;];\n    }"))
+        "1 [label=&quot;MapPartitionsRDD [1]"))
       assert(stage0.contains("{\n      label=&quot;groupBy&quot;;\n      " +
-        "2 [label=&quot;MapPartitionsRDD [2]&quot;];\n    }"))
+        "2 [label=&quot;MapPartitionsRDD [2]"))
 
       val stage1 = Source.fromURL(sc.ui.get.appUIAddress +
         "/stages/stage/?id=1&attempt=0&expandDagViz=true").mkString
       assert(stage1.contains("digraph G {\n  subgraph clusterstage_1 {\n    " +
         "label=&quot;Stage 1&quot;;\n    subgraph "))
       assert(stage1.contains("{\n      label=&quot;groupBy&quot;;\n      " +
-        "3 [label=&quot;ShuffledRDD [3]&quot;];\n    }"))
+        "3 [label=&quot;ShuffledRDD [3]"))
       assert(stage1.contains("{\n      label=&quot;map&quot;;\n      " +
-        "4 [label=&quot;MapPartitionsRDD [4]&quot;];\n    }"))
+        "4 [label=&quot;MapPartitionsRDD [4]"))
       assert(stage1.contains("{\n      label=&quot;groupBy&quot;;\n      " +
-        "5 [label=&quot;MapPartitionsRDD [5]&quot;];\n    }"))
+        "5 [label=&quot;MapPartitionsRDD [5]"))
 
       val stage2 = Source.fromURL(sc.ui.get.appUIAddress +
         "/stages/stage/?id=2&attempt=0&expandDagViz=true").mkString
       assert(stage2.contains("digraph G {\n  subgraph clusterstage_2 {\n    " +
         "label=&quot;Stage 2&quot;;\n    subgraph "))
       assert(stage2.contains("{\n      label=&quot;groupBy&quot;;\n      " +
-        "6 [label=&quot;ShuffledRDD [6]&quot;];\n    }"))
+        "6 [label=&quot;ShuffledRDD [6]"))
     }
   }
 
diff --git a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
index 953456c2caa8..3f94ef704191 100644
--- a/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/JsonProtocolSuite.scala
@@ -111,6 +111,7 @@ class JsonProtocolSuite extends SparkFunSuite {
   test("Dependent Classes") {
     val logUrlMap = Map("stderr" -> "mystderr", "stdout" -> "mystdout").toMap
     testRDDInfo(makeRddInfo(2, 3, 4, 5L, 6L))
+    testCallsite(CallSite("happy", "birthday"))
     testStageInfo(makeStageInfo(10, 20, 30, 40L, 50L))
     testTaskInfo(makeTaskInfo(999L, 888, 55, 777L, false))
     testTaskMetrics(makeTaskMetrics(
@@ -163,6 +164,10 @@ class JsonProtocolSuite extends SparkFunSuite {
     testBlockId(StreamBlockId(1, 2L))
   }
 
+  /* ============================== *
+   |  Backward compatibility tests  |
+   * ============================== */
+
   test("ExceptionFailure backward compatibility") {
     val exceptionFailure = ExceptionFailure("To be", "or not to be", stackTrace, null,
       None, None)
@@ -334,14 +339,17 @@ class JsonProtocolSuite extends SparkFunSuite {
     assertEquals(expectedJobEnd, JsonProtocol.jobEndFromJson(oldEndEvent))
   }
 
-  test("RDDInfo backward compatibility (scope, parent IDs)") {
-    // Prior to Spark 1.4.0, RDDInfo did not have the "Scope" and "Parent IDs" properties
-    val rddInfo = new RDDInfo(
-      1, "one", 100, StorageLevel.NONE, Seq(1, 6, 8), Some(new RDDOperationScope("fable")))
+  test("RDDInfo backward compatibility (scope, parent IDs, callsite)") {
+    // "Scope" and "Parent IDs" were introduced in Spark 1.4.0
+    // "Callsite" was introduced in Spark 1.6.0
+    val rddInfo = new RDDInfo(1, "one", 100, StorageLevel.NONE, Seq(1, 6, 8),
+      CallSite("short", "long"), Some(new RDDOperationScope("fable")))
     val oldRddInfoJson = JsonProtocol.rddInfoToJson(rddInfo)
       .removeField({ _._1 == "Parent IDs"})
       .removeField({ _._1 == "Scope"})
-    val expectedRddInfo = new RDDInfo(1, "one", 100, StorageLevel.NONE, Seq.empty, scope = None)
+      .removeField({ _._1 == "Callsite"})
+    val expectedRddInfo = new RDDInfo(
+      1, "one", 100, StorageLevel.NONE, Seq.empty, CallSite.empty, scope = None)
     assertEquals(expectedRddInfo, JsonProtocol.rddInfoFromJson(oldRddInfoJson))
   }
 
@@ -389,6 +397,11 @@ class JsonProtocolSuite extends SparkFunSuite {
     assertEquals(info, newInfo)
   }
 
+  private def testCallsite(callsite: CallSite): Unit = {
+    val newCallsite = JsonProtocol.callsiteFromJson(JsonProtocol.callsiteToJson(callsite))
+    assert(callsite === newCallsite)
+  }
+
   private def testStageInfo(info: StageInfo) {
     val newInfo = JsonProtocol.stageInfoFromJson(JsonProtocol.stageInfoToJson(info))
     assertEquals(info, newInfo)
@@ -713,7 +726,8 @@ class JsonProtocolSuite extends SparkFunSuite {
   }
 
   private def makeRddInfo(a: Int, b: Int, c: Int, d: Long, e: Long) = {
-    val r = new RDDInfo(a, "mayor", b, StorageLevel.MEMORY_AND_DISK, Seq(1, 4, 7))
+    val r = new RDDInfo(a, "mayor", b, StorageLevel.MEMORY_AND_DISK,
+      Seq(1, 4, 7), CallSite(a.toString, b.toString))
     r.numCachedPartitions = c
     r.memSize = d
     r.diskSize = e
@@ -856,6 +870,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |      {
       |        "RDD ID": 101,
       |        "Name": "mayor",
+      |        "Callsite": {"Short Form": "101", "Long Form": "201"},
       |        "Parent IDs": [1, 4, 7],
       |        "Storage Level": {
       |          "Use Disk": true,
@@ -1258,6 +1273,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 1,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "1", "Long Form": "200"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1301,6 +1317,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 2,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "2", "Long Form": "400"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1318,6 +1335,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 3,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "3", "Long Form": "401"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1361,6 +1379,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 3,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "3", "Long Form": "600"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1378,6 +1397,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 4,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "4", "Long Form": "601"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1395,6 +1415,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 5,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "5", "Long Form": "602"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1438,6 +1459,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 4,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "4", "Long Form": "800"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1455,6 +1477,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 5,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "5", "Long Form": "801"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1472,6 +1495,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 6,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "6", "Long Form": "802"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,
@@ -1489,6 +1513,7 @@ class JsonProtocolSuite extends SparkFunSuite {
       |        {
       |          "RDD ID": 7,
       |          "Name": "mayor",
+      |          "Callsite": {"Short Form": "7", "Long Form": "803"},
       |          "Parent IDs": [1, 4, 7],
       |          "Storage Level": {
       |            "Use Disk": true,

From 2ff0e79a8647cca5c9c57f613a07e739ac4f677e Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Fri, 6 Nov 2015 22:56:29 -0800
Subject: [PATCH 549/896] [SPARK-8467] [MLLIB] [PYSPARK] Add
 LDAModel.describeTopics() in Python

Could jkbradley and davies review it?

- Create a wrapper class: `LDAModelWrapper` for `LDAModel`. Because we can't deal with the return value of`describeTopics` in Scala from pyspark directly. `Array[(Array[Int], Array[Double])]` is too complicated to convert it.
- Add `loadLDAModel` in `PythonMLlibAPI`. Since `LDAModel` in Scala is an abstract class and we need to call `load` of `DistributedLDAModel`.

[[SPARK-8467] Add LDAModel.describeTopics() in Python - ASF JIRA](https://issues.apache.org/jira/browse/SPARK-8467)

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8643 from yu-iskw/SPARK-8467-2.
---
 .../mllib/api/python/LDAModelWrapper.scala    | 46 +++++++++++++++++++
 .../mllib/api/python/PythonMLLibAPI.scala     | 13 +++++-
 python/pyspark/mllib/clustering.py            | 33 +++++++------
 3 files changed, 75 insertions(+), 17 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/api/python/LDAModelWrapper.scala

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/LDAModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/LDAModelWrapper.scala
new file mode 100644
index 000000000000..63282eee6e65
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/LDAModelWrapper.scala
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.mllib.api.python
+
+import scala.collection.JavaConverters
+
+import org.apache.spark.SparkContext
+import org.apache.spark.mllib.clustering.LDAModel
+import org.apache.spark.mllib.linalg.Matrix
+
+/**
+ * Wrapper around LDAModel to provide helper methods in Python
+ */
+private[python] class LDAModelWrapper(model: LDAModel) {
+
+  def topicsMatrix(): Matrix = model.topicsMatrix
+
+  def vocabSize(): Int = model.vocabSize
+
+  def describeTopics(): Array[Byte] = describeTopics(this.model.vocabSize)
+
+  def describeTopics(maxTermsPerTopic: Int): Array[Byte] = {
+    val topics = model.describeTopics(maxTermsPerTopic).map { case (terms, termWeights) =>
+      val jTerms = JavaConverters.seqAsJavaListConverter(terms).asJava
+      val jTermWeights = JavaConverters.seqAsJavaListConverter(termWeights).asJava
+      Array[Any](jTerms, jTermWeights)
+    }
+    SerDe.dumps(JavaConverters.seqAsJavaListConverter(topics).asJava)
+  }
+
+  def save(sc: SparkContext, path: String): Unit = model.save(sc, path)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
index 40c41806cdfe..54b03a9f9028 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/PythonMLLibAPI.scala
@@ -517,7 +517,7 @@ private[python] class PythonMLLibAPI extends Serializable {
       topicConcentration: Double,
       seed: java.lang.Long,
       checkpointInterval: Int,
-      optimizer: String): LDAModel = {
+      optimizer: String): LDAModelWrapper = {
     val algo = new LDA()
       .setK(k)
       .setMaxIterations(maxIterations)
@@ -535,7 +535,16 @@ private[python] class PythonMLLibAPI extends Serializable {
         case _ => throw new IllegalArgumentException("input values contains invalid type value.")
       }
     }
-    algo.run(documents)
+    val model = algo.run(documents)
+    new LDAModelWrapper(model)
+  }
+
+  /**
+   * Load a LDA model
+   */
+  def loadLDAModel(jsc: JavaSparkContext, path: String): LDAModelWrapper = {
+    val model = DistributedLDAModel.load(jsc.sc, path)
+    new LDAModelWrapper(model)
   }
 
 
diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index 8629aa5a1716..12081f8c6907 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -671,7 +671,7 @@ def predictOnValues(self, dstream):
         return dstream.mapValues(lambda x: self._model.predict(x))
 
 
-class LDAModel(JavaModelWrapper):
+class LDAModel(JavaModelWrapper, JavaSaveable, Loader):
 
     """ A clustering model derived from the LDA method.
 
@@ -691,9 +691,14 @@ class LDAModel(JavaModelWrapper):
     ...     [2, SparseVector(2, {0: 1.0})],
     ... ]
     >>> rdd =  sc.parallelize(data)
-    >>> model = LDA.train(rdd, k=2)
+    >>> model = LDA.train(rdd, k=2, seed=1)
     >>> model.vocabSize()
     2
+    >>> model.describeTopics()
+    [([1, 0], [0.5..., 0.49...]), ([0, 1], [0.5..., 0.49...])]
+    >>> model.describeTopics(1)
+    [([1], [0.5...]), ([0], [0.5...])]
+
     >>> topics = model.topicsMatrix()
     >>> topics_expect = array([[0.5,  0.5], [0.5, 0.5]])
     >>> assert_almost_equal(topics, topics_expect, 1)
@@ -724,18 +729,17 @@ def vocabSize(self):
         """Vocabulary size (number of terms or terms in the vocabulary)"""
         return self.call("vocabSize")
 
-    @since('1.5.0')
-    def save(self, sc, path):
-        """Save the LDAModel on to disk.
+    @since('1.6.0')
+    def describeTopics(self, maxTermsPerTopic=None):
+        """Return the topics described by weighted terms.
 
-        :param sc: SparkContext
-        :param path: str, path to where the model needs to be stored.
+        WARNING: If vocabSize and k are large, this can return a large object!
         """
-        if not isinstance(sc, SparkContext):
-            raise TypeError("sc should be a SparkContext, got type %s" % type(sc))
-        if not isinstance(path, basestring):
-            raise TypeError("path should be a basestring, got type %s" % type(path))
-        self._java_model.save(sc._jsc.sc(), path)
+        if maxTermsPerTopic is None:
+            topics = self.call("describeTopics")
+        else:
+            topics = self.call("describeTopics", maxTermsPerTopic)
+        return topics
 
     @classmethod
     @since('1.5.0')
@@ -749,9 +753,8 @@ def load(cls, sc, path):
             raise TypeError("sc should be a SparkContext, got type %s" % type(sc))
         if not isinstance(path, basestring):
             raise TypeError("path should be a basestring, got type %s" % type(path))
-        java_model = sc._jvm.org.apache.spark.mllib.clustering.DistributedLDAModel.load(
-            sc._jsc.sc(), path)
-        return cls(java_model)
+        model = callMLlibFunc("loadLDAModel", sc, path)
+        return LDAModel(model)
 
 
 class LDA(object):

From ef362846eb448769bcf774fc9090a5013d459464 Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Sat, 7 Nov 2015 13:37:37 -0800
Subject: [PATCH 550/896] [SPARK-9241][SQL] Supporting multiple DISTINCT
 columns - follow-up

This PR is a follow up for PR https://github.com/apache/spark/pull/9406. It adds more documentation to the rewriting rule, removes a redundant if expression in the non-distinct aggregation path and adds a multiple distinct test to the AggregationQuerySuite.

cc yhuai marmbrus

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9541 from hvanhovell/SPARK-9241-followup.
---
 .../expressions/aggregate/Utils.scala         | 114 ++++++++++++++----
 .../execution/AggregationQuerySuite.scala     |  17 +++
 2 files changed, 108 insertions(+), 23 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
index 39010c3be6d4..ac23f727829b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
@@ -222,10 +222,76 @@ object Utils {
  * aggregation in which the regular aggregation expressions and every distinct clause is aggregated
  * in a separate group. The results are then combined in a second aggregate.
  *
- * TODO Expression cannocalization
- * TODO Eliminate foldable expressions from distinct clauses.
- * TODO This eliminates all distinct expressions. We could safely pass one to the aggregate
- *      operator. Perhaps this is a good thing? It is much simpler to plan later on...
+ * For example (in scala):
+ * {{{
+ *   val data = Seq(
+ *     ("a", "ca1", "cb1", 10),
+ *     ("a", "ca1", "cb2", 5),
+ *     ("b", "ca1", "cb1", 13))
+ *     .toDF("key", "cat1", "cat2", "value")
+ *   data.registerTempTable("data")
+ *
+ *   val agg = data.groupBy($"key")
+ *     .agg(
+ *       countDistinct($"cat1").as("cat1_cnt"),
+ *       countDistinct($"cat2").as("cat2_cnt"),
+ *       sum($"value").as("total"))
+ * }}}
+ *
+ * This translates to the following (pseudo) logical plan:
+ * {{{
+ * Aggregate(
+ *    key = ['key]
+ *    functions = [COUNT(DISTINCT 'cat1),
+ *                 COUNT(DISTINCT 'cat2),
+ *                 sum('value)]
+ *    output = ['key, 'cat1_cnt, 'cat2_cnt, 'total])
+ *   LocalTableScan [...]
+ * }}}
+ *
+ * This rule rewrites this logical plan to the following (pseudo) logical plan:
+ * {{{
+ * Aggregate(
+ *    key = ['key]
+ *    functions = [count(if (('gid = 1)) 'cat1 else null),
+ *                 count(if (('gid = 2)) 'cat2 else null),
+ *                 first(if (('gid = 0)) 'total else null) ignore nulls]
+ *    output = ['key, 'cat1_cnt, 'cat2_cnt, 'total])
+ *   Aggregate(
+ *      key = ['key, 'cat1, 'cat2, 'gid]
+ *      functions = [sum('value)]
+ *      output = ['key, 'cat1, 'cat2, 'gid, 'total])
+ *     Expand(
+ *        projections = [('key, null, null, 0, cast('value as bigint)),
+ *                       ('key, 'cat1, null, 1, null),
+ *                       ('key, null, 'cat2, 2, null)]
+ *        output = ['key, 'cat1, 'cat2, 'gid, 'value])
+ *       LocalTableScan [...]
+ * }}}
+ *
+ * The rule does the following things here:
+ * 1. Expand the data. There are three aggregation groups in this query:
+ *    i. the non-distinct group;
+ *    ii. the distinct 'cat1 group;
+ *    iii. the distinct 'cat2 group.
+ *    An expand operator is inserted to expand the child data for each group. The expand will null
+ *    out all unused columns for the given group; this must be done in order to ensure correctness
+ *    later on. Groups can by identified by a group id (gid) column added by the expand operator.
+ * 2. De-duplicate the distinct paths and aggregate the non-aggregate path. The group by clause of
+ *    this aggregate consists of the original group by clause, all the requested distinct columns
+ *    and the group id. Both de-duplication of distinct column and the aggregation of the
+ *    non-distinct group take advantage of the fact that we group by the group id (gid) and that we
+ *    have nulled out all non-relevant columns for the the given group.
+ * 3. Aggregating the distinct groups and combining this with the results of the non-distinct
+ *    aggregation. In this step we use the group id to filter the inputs for the aggregate
+ *    functions. The result of the non-distinct group are 'aggregated' by using the first operator,
+ *    it might be more elegant to use the native UDAF merge mechanism for this in the future.
+ *
+ * This rule duplicates the input data by two or more times (# distinct groups + an optional
+ * non-distinct group). This will put quite a bit of memory pressure of the used aggregate and
+ * exchange operators. Keeping the number of distinct groups as low a possible should be priority,
+ * we could improve this in the current rule by applying more advanced expression cannocalization
+ * techniques.
  */
 object MultipleDistinctRewriter extends Rule[LogicalPlan] {
 
@@ -261,11 +327,10 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       // Functions used to modify aggregate functions and their inputs.
       def evalWithinGroup(id: Literal, e: Expression) = If(EqualTo(gid, id), e, nullify(e))
       def patchAggregateFunctionChildren(
-          af: AggregateFunction2,
-          id: Literal,
-          attrs: Map[Expression, Expression]): AggregateFunction2 = {
-        af.withNewChildren(af.children.map { case afc =>
-          evalWithinGroup(id, attrs(afc))
+          af: AggregateFunction2)(
+          attrs: Expression => Expression): AggregateFunction2 = {
+        af.withNewChildren(af.children.map {
+          case afc => attrs(afc)
         }).asInstanceOf[AggregateFunction2]
       }
 
@@ -288,7 +353,9 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
           // Final aggregate
           val operators = expressions.map { e =>
             val af = e.aggregateFunction
-            val naf = patchAggregateFunctionChildren(af, id, distinctAggChildAttrMap)
+            val naf = patchAggregateFunctionChildren(af) { x =>
+              evalWithinGroup(id, distinctAggChildAttrMap(x))
+            }
             (e, e.copy(aggregateFunction = naf, isDistinct = false))
           }
 
@@ -304,26 +371,27 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       val regularGroupId = Literal(0)
       val regularAggOperatorMap = regularAggExprs.map { e =>
         // Perform the actual aggregation in the initial aggregate.
-        val af = patchAggregateFunctionChildren(
-          e.aggregateFunction,
-          regularGroupId,
-          regularAggChildAttrMap)
-        val a = Alias(e.copy(aggregateFunction = af), e.toString)()
-
-        // Get the result of the first aggregate in the last aggregate.
-        val b = AggregateExpression2(
-          aggregate.First(evalWithinGroup(regularGroupId, a.toAttribute), Literal(true)),
+        val af = patchAggregateFunctionChildren(e.aggregateFunction)(regularAggChildAttrMap)
+        val operator = Alias(e.copy(aggregateFunction = af), e.toString)()
+
+        // Select the result of the first aggregate in the last aggregate.
+        val result = AggregateExpression2(
+          aggregate.First(evalWithinGroup(regularGroupId, operator.toAttribute), Literal(true)),
           mode = Complete,
           isDistinct = false)
 
         // Some aggregate functions (COUNT) have the special property that they can return a
         // non-null result without any input. We need to make sure we return a result in this case.
-        val c = af.defaultResult match {
-          case Some(lit) => Coalesce(Seq(b, lit))
-          case None => b
+        val resultWithDefault = af.defaultResult match {
+          case Some(lit) => Coalesce(Seq(result, lit))
+          case None => result
         }
 
-        (e, a, c)
+        // Return a Tuple3 containing:
+        // i. The original aggregate expression (used for look ups).
+        // ii. The actual aggregation operator (used in the first aggregate).
+        // iii. The operator that selects and returns the result (used in the second aggregate).
+        (e, operator, resultWithDefault)
       }
 
       // Construct the regular aggregate input projection only if we need one.
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index ea80060e370e..7f6fe339232a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -516,6 +516,23 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         Row(3, 4, 4, 3, null) :: Nil)
   }
 
+  test("multiple distinct column sets") {
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT
+          |  key,
+          |  count(distinct value1),
+          |  count(distinct value2)
+          |FROM agg2
+          |GROUP BY key
+        """.stripMargin),
+      Row(null, 3, 3) ::
+        Row(1, 2, 3) ::
+        Row(2, 2, 1) ::
+        Row(3, 0, 1) :: Nil)
+  }
+
   test("test count") {
     checkAnswer(
       sqlContext.sql(

From 4b69a42eda3aff08eb7437c353fe2cc87ed67181 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Sat, 7 Nov 2015 19:44:45 -0800
Subject: [PATCH 551/896] [SPARK-11362] [SQL] Use Spark BitSet in
 BroadcastNestedLoopJoin

JIRA: https://issues.apache.org/jira/browse/SPARK-11362

We use scala.collection.mutable.BitSet in BroadcastNestedLoopJoin now. We should use Spark's BitSet.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9316 from viirya/use-spark-bitset.
---
 .../joins/BroadcastNestedLoopJoin.scala        | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
index 05d20f511aef..aab177b2e842 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastNestedLoopJoin.scala
@@ -24,7 +24,7 @@ import org.apache.spark.sql.catalyst.plans.physical.Partitioning
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
 import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.util.collection.CompactBuffer
+import org.apache.spark.util.collection.{BitSet, CompactBuffer}
 
 
 case class BroadcastNestedLoopJoin(
@@ -95,9 +95,7 @@ case class BroadcastNestedLoopJoin(
     /** All rows that either match both-way, or rows from streamed joined with nulls. */
     val matchesOrStreamedRowsWithNulls = streamed.execute().mapPartitions { streamedIter =>
       val matchedRows = new CompactBuffer[InternalRow]
-      // TODO: Use Spark's BitSet.
-      val includedBroadcastTuples =
-        new scala.collection.mutable.BitSet(broadcastedRelation.value.size)
+      val includedBroadcastTuples = new BitSet(broadcastedRelation.value.size)
       val joinedRow = new JoinedRow
 
       val leftNulls = new GenericMutableRow(left.output.size)
@@ -115,11 +113,11 @@ case class BroadcastNestedLoopJoin(
             case BuildRight if boundCondition(joinedRow(streamedRow, broadcastedRow)) =>
               matchedRows += resultProj(joinedRow(streamedRow, broadcastedRow)).copy()
               streamRowMatched = true
-              includedBroadcastTuples += i
+              includedBroadcastTuples.set(i)
             case BuildLeft if boundCondition(joinedRow(broadcastedRow, streamedRow)) =>
               matchedRows += resultProj(joinedRow(broadcastedRow, streamedRow)).copy()
               streamRowMatched = true
-              includedBroadcastTuples += i
+              includedBroadcastTuples.set(i)
             case _ =>
           }
           i += 1
@@ -138,8 +136,8 @@ case class BroadcastNestedLoopJoin(
 
     val includedBroadcastTuples = matchesOrStreamedRowsWithNulls.map(_._2)
     val allIncludedBroadcastTuples = includedBroadcastTuples.fold(
-      new scala.collection.mutable.BitSet(broadcastedRelation.value.size)
-    )(_ ++ _)
+      new BitSet(broadcastedRelation.value.size)
+    )(_ | _)
 
     val leftNulls = new GenericMutableRow(left.output.size)
     val rightNulls = new GenericMutableRow(right.output.size)
@@ -155,7 +153,7 @@ case class BroadcastNestedLoopJoin(
           val joinedRow = new JoinedRow
           joinedRow.withLeft(leftNulls)
           while (i < rel.length) {
-            if (!allIncludedBroadcastTuples.contains(i)) {
+            if (!allIncludedBroadcastTuples.get(i)) {
               buf += resultProj(joinedRow.withRight(rel(i))).copy()
             }
             i += 1
@@ -164,7 +162,7 @@ case class BroadcastNestedLoopJoin(
           val joinedRow = new JoinedRow
           joinedRow.withRight(rightNulls)
           while (i < rel.length) {
-            if (!allIncludedBroadcastTuples.contains(i)) {
+            if (!allIncludedBroadcastTuples.get(i)) {
               buf += resultProj(joinedRow.withLeft(rel(i))).copy()
             }
             i += 1

From d981902101767b32dc83a5a639311e197f5cbcc1 Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Sun, 8 Nov 2015 11:15:58 +0000
Subject: [PATCH 552/896] [SPARK-11476][DOCS] Incorrect function referred to in
 MLib Random data generation documentation

Fix Python example to use normalRDD as advertised

Author: Sean Owen <sowen@cloudera.com>

Closes #9529 from srowen/SPARK-11476.
---
 docs/mllib-statistics.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/mllib-statistics.md b/docs/mllib-statistics.md
index 2c7c9ed693fd..ade5b0768aef 100644
--- a/docs/mllib-statistics.md
+++ b/docs/mllib-statistics.md
@@ -594,7 +594,7 @@ sc = ... # SparkContext
 
 # Generate a random double RDD that contains 1 million i.i.d. values drawn from the
 # standard normal distribution `N(0, 1)`, evenly distributed in 10 partitions.
-u = RandomRDDs.uniformRDD(sc, 1000000L, 10)
+u = RandomRDDs.normalRDD(sc, 1000000L, 10)
 # Apply a transform to get a random double RDD following `N(1, 4)`.
 v = u.map(lambda x: 1.0 + 2.0 * x)
 {% endhighlight %}

From 5c4e6d7ec9157c02494a382dfb49e7fbde3be222 Mon Sep 17 00:00:00 2001
From: Rohit Agarwal <mindprince@gmail.com>
Date: Sun, 8 Nov 2015 14:24:26 +0000
Subject: [PATCH 553/896] [DOC][SQL] Remove redundant out-of-place python
 snippet

This snippet seems to be mistakenly introduced at two places in #5348.

Author: Rohit Agarwal <mindprince@gmail.com>

Closes #9540 from mindprince/patch-1.
---
 docs/sql-programming-guide.md | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 2fe5c3633889..085874133d96 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1089,15 +1089,6 @@ for (teenName in collect(teenNames)) {
 
 </div>
 
-<div data-lang="python"  markdown="1">
-
-{% highlight python %}
-# sqlContext is an existing HiveContext
-sqlContext.sql("REFRESH TABLE my_table")
-{% endhighlight %}
-
-</div>
-
 <div data-lang="sql"  markdown="1">
 
 {% highlight sql %}

From 30c8ba71a76788cbc6916bc1ba6bc8522925fc2b Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Sun, 8 Nov 2015 11:06:10 -0800
Subject: [PATCH 554/896] [SPARK-11451][SQL] Support single distinct count on
 multiple columns.

This PR adds support for multiple column in a single count distinct aggregate to the new aggregation path.

cc yhuai

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9409 from hvanhovell/SPARK-11451.
---
 .../expressions/aggregate/Utils.scala         | 44 +++++++++++--------
 .../expressions/conditionalExpressions.scala  | 30 ++++++++++++-
 .../plans/logical/basicOperators.scala        |  3 ++
 .../ConditionalExpressionSuite.scala          | 14 ++++++
 .../spark/sql/DataFrameAggregateSuite.scala   | 25 +++++++++++
 .../execution/AggregationQuerySuite.scala     | 37 +++++++++++++---
 6 files changed, 127 insertions(+), 26 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
index ac23f727829b..9b22ce261973 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
@@ -22,26 +22,27 @@ import org.apache.spark.sql.catalyst._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.{Expand, Aggregate, LogicalPlan}
 import org.apache.spark.sql.catalyst.rules.Rule
-import org.apache.spark.sql.types.{IntegerType, StructType, MapType, ArrayType}
+import org.apache.spark.sql.types._
 
 /**
  * Utility functions used by the query planner to convert our plan to new aggregation code path.
  */
 object Utils {
-  // Right now, we do not support complex types in the grouping key schema.
-  private def supportsGroupingKeySchema(aggregate: Aggregate): Boolean = {
-    val hasComplexTypes = aggregate.groupingExpressions.map(_.dataType).exists {
-      case array: ArrayType => true
-      case map: MapType => true
-      case struct: StructType => true
-      case _ => false
-    }
 
-    !hasComplexTypes
+  // Check if the DataType given cannot be part of a group by clause.
+  private def isUnGroupable(dt: DataType): Boolean = dt match {
+    case _: ArrayType | _: MapType => true
+    case s: StructType => s.fields.exists(f => isUnGroupable(f.dataType))
+    case _ => false
   }
 
+  // Right now, we do not support complex types in the grouping key schema.
+  private def supportsGroupingKeySchema(aggregate: Aggregate): Boolean =
+    !aggregate.groupingExpressions.exists(e => isUnGroupable(e.dataType))
+
   private def doConvert(plan: LogicalPlan): Option[Aggregate] = plan match {
     case p: Aggregate if supportsGroupingKeySchema(p) =>
+
       val converted = MultipleDistinctRewriter.rewrite(p.transformExpressionsDown {
         case expressions.Average(child) =>
           aggregate.AggregateExpression2(
@@ -55,10 +56,14 @@ object Utils {
             mode = aggregate.Complete,
             isDistinct = false)
 
-        // We do not support multiple COUNT DISTINCT columns for now.
-        case expressions.CountDistinct(children) if children.length == 1 =>
+        case expressions.CountDistinct(children) =>
+          val child = if (children.size > 1) {
+            DropAnyNull(CreateStruct(children))
+          } else {
+            children.head
+          }
           aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Count(children.head),
+            aggregateFunction = aggregate.Count(child),
             mode = aggregate.Complete,
             isDistinct = true)
 
@@ -320,7 +325,7 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       val gid = new AttributeReference("gid", IntegerType, false)()
       val groupByMap = a.groupingExpressions.collect {
         case ne: NamedExpression => ne -> ne.toAttribute
-        case e => e -> new AttributeReference(e.prettyName, e.dataType, e.nullable)()
+        case e => e -> new AttributeReference(e.prettyString, e.dataType, e.nullable)()
       }
       val groupByAttrs = groupByMap.map(_._2)
 
@@ -365,14 +370,15 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       // Setup expand for the 'regular' aggregate expressions.
       val regularAggExprs = aggExpressions.filter(!_.isDistinct)
       val regularAggChildren = regularAggExprs.flatMap(_.aggregateFunction.children).distinct
-      val regularAggChildAttrMap = regularAggChildren.map(expressionAttributePair).toMap
+      val regularAggChildAttrMap = regularAggChildren.map(expressionAttributePair)
 
       // Setup aggregates for 'regular' aggregate expressions.
       val regularGroupId = Literal(0)
+      val regularAggChildAttrLookup = regularAggChildAttrMap.toMap
       val regularAggOperatorMap = regularAggExprs.map { e =>
         // Perform the actual aggregation in the initial aggregate.
-        val af = patchAggregateFunctionChildren(e.aggregateFunction)(regularAggChildAttrMap)
-        val operator = Alias(e.copy(aggregateFunction = af), e.toString)()
+        val af = patchAggregateFunctionChildren(e.aggregateFunction)(regularAggChildAttrLookup)
+        val operator = Alias(e.copy(aggregateFunction = af), e.prettyString)()
 
         // Select the result of the first aggregate in the last aggregate.
         val result = AggregateExpression2(
@@ -416,7 +422,7 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       // Construct the expand operator.
       val expand = Expand(
         regularAggProjection ++ distinctAggProjections,
-        groupByAttrs ++ distinctAggChildAttrs ++ Seq(gid) ++ regularAggChildAttrMap.values.toSeq,
+        groupByAttrs ++ distinctAggChildAttrs ++ Seq(gid) ++ regularAggChildAttrMap.map(_._2),
         a.child)
 
       // Construct the first aggregate operator. This de-duplicates the all the children of
@@ -457,5 +463,5 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
     // NamedExpression. This is done to prevent collisions between distinct and regular aggregate
     // children, in this case attribute reuse causes the input of the regular aggregate to bound to
     // the (nulled out) input of the distinct aggregate.
-    e -> new AttributeReference(e.prettyName, e.dataType, true)()
+    e -> new AttributeReference(e.prettyString, e.dataType, true)()
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
index d532629984be..0d4af43978ea 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
@@ -21,7 +21,7 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions.codegen._
 import org.apache.spark.sql.catalyst.util.TypeUtils
-import org.apache.spark.sql.types.{NullType, BooleanType, DataType}
+import org.apache.spark.sql.types._
 
 
 case class If(predicate: Expression, trueValue: Expression, falseValue: Expression)
@@ -419,3 +419,31 @@ case class Greatest(children: Seq[Expression]) extends Expression {
     """
   }
 }
+
+/** Operator that drops a row when it contains any nulls. */
+case class DropAnyNull(child: Expression) extends UnaryExpression with ExpectsInputTypes {
+  override def nullable: Boolean = true
+  override def dataType: DataType = child.dataType
+  override def inputTypes: Seq[AbstractDataType] = Seq(StructType)
+
+  protected override def nullSafeEval(input: Any): InternalRow = {
+    val row = input.asInstanceOf[InternalRow]
+    if (row.anyNull) {
+      null
+    } else {
+      row
+    }
+  }
+
+  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    nullSafeCodeGen(ctx, ev, eval => {
+      s"""
+        if ($eval.anyNull()) {
+          ${ev.isNull} = true;
+        } else {
+          ${ev.value} = $eval;
+        }
+      """
+    })
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index fb963e2f8f7e..09aac00a455f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -306,6 +306,9 @@ case class Expand(
     output: Seq[Attribute],
     child: LogicalPlan) extends UnaryNode {
 
+  override def references: AttributeSet =
+    AttributeSet(projections.flatten.flatMap(_.references))
+
   override def statistics: Statistics = {
     // TODO shouldn't we factor in the size of the projection versus the size of the backing child
     //      row?
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ConditionalExpressionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ConditionalExpressionSuite.scala
index 0df673bb9fa0..c1e3c17b8710 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ConditionalExpressionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ConditionalExpressionSuite.scala
@@ -231,4 +231,18 @@ class ConditionalExpressionSuite extends SparkFunSuite with ExpressionEvalHelper
       checkConsistencyBetweenInterpretedAndCodegen(Greatest, dt, 2)
     }
   }
+
+  test("function dropAnyNull") {
+    val drop = DropAnyNull(CreateStruct(Seq('a.string.at(0), 'b.string.at(1))))
+    val a = create_row("a", "q")
+    val nullStr: String = null
+    checkEvaluation(drop, a, a)
+    checkEvaluation(drop, null, create_row("b", nullStr))
+    checkEvaluation(drop, null, create_row(nullStr, nullStr))
+
+    val row = 'r.struct(
+      StructField("a", StringType, false),
+      StructField("b", StringType, true)).at(0)
+    checkEvaluation(DropAnyNull(row), null, create_row(null))
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index 2e679e7bc4e0..eb1ee266c5d2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -162,6 +162,31 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     )
   }
 
+  test("multiple column distinct count") {
+    val df1 = Seq(
+      ("a", "b", "c"),
+      ("a", "b", "c"),
+      ("a", "b", "d"),
+      ("x", "y", "z"),
+      ("x", "q", null.asInstanceOf[String]))
+      .toDF("key1", "key2", "key3")
+
+    checkAnswer(
+      df1.agg(countDistinct('key1, 'key2)),
+      Row(3)
+    )
+
+    checkAnswer(
+      df1.agg(countDistinct('key1, 'key2, 'key3)),
+      Row(3)
+    )
+
+    checkAnswer(
+      df1.groupBy('key1).agg(countDistinct('key2, 'key3)),
+      Seq(Row("a", 2), Row("x", 1))
+    )
+  }
+
   test("zero count") {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
     checkAnswer(
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 7f6fe339232a..ea36c132bb19 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -516,21 +516,46 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         Row(3, 4, 4, 3, null) :: Nil)
   }
 
-  test("multiple distinct column sets") {
+  test("single distinct multiple columns set") {
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT
+          |  key,
+          |  count(distinct value1, value2)
+          |FROM agg2
+          |GROUP BY key
+        """.stripMargin),
+      Row(null, 3) ::
+        Row(1, 3) ::
+        Row(2, 1) ::
+        Row(3, 0) :: Nil)
+  }
+
+  test("multiple distinct multiple columns sets") {
     checkAnswer(
       sqlContext.sql(
         """
           |SELECT
           |  key,
           |  count(distinct value1),
-          |  count(distinct value2)
+          |  sum(distinct value1),
+          |  count(distinct value2),
+          |  sum(distinct value2),
+          |  count(distinct value1, value2),
+          |  count(value1),
+          |  sum(value1),
+          |  count(value2),
+          |  sum(value2),
+          |  count(*),
+          |  count(1)
           |FROM agg2
           |GROUP BY key
         """.stripMargin),
-      Row(null, 3, 3) ::
-        Row(1, 2, 3) ::
-        Row(2, 2, 1) ::
-        Row(3, 0, 1) :: Nil)
+      Row(null, 3, 30, 3, 60, 3, 3, 30, 3, 60, 4, 4) ::
+        Row(1, 2, 40, 3, -10, 3, 3, 70, 3, -10, 3, 3) ::
+        Row(2, 2, 0, 1, 1, 1, 3, 1, 3, 3, 4, 4) ::
+        Row(3, 0, null, 1, 3, 0, 0, null, 1, 3, 2, 2) :: Nil)
   }
 
   test("test count") {

From 26739059bc39cd7aa7e0b1c16089c1cf8d8e4d7d Mon Sep 17 00:00:00 2001
From: xin Wu <xinwu@us.ibm.com>
Date: Sun, 8 Nov 2015 12:28:19 -0800
Subject: [PATCH 555/896] =?UTF-8?q?[SPARK-10046][SQL]=20Hive=20warehouse?=
 =?UTF-8?q?=20dir=20not=20set=20in=20current=20directory=20when=20not=20?=
 =?UTF-8?q?=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Doc change to align with HiveConf default in terms of where to create `warehouse` directory.

Author: xin Wu <xinwu@us.ibm.com>

Closes #9365 from xwu0226/spark-10046-commit.
---
 docs/sql-programming-guide.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 085874133d96..52e03b951f96 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1627,8 +1627,10 @@ YARN cluster. The convenient way to do this is adding them through the `--jars`
 When working with Hive one must construct a `HiveContext`, which inherits from `SQLContext`, and
 adds support for finding tables in the MetaStore and writing queries using HiveQL. Users who do
 not have an existing Hive deployment can still create a `HiveContext`.  When not configured by the
-hive-site.xml, the context automatically creates `metastore_db` and `warehouse` in the current
-directory.
+hive-site.xml, the context automatically creates `metastore_db` in the current directory and
+creates `warehouse` directory indicated by HiveConf, which defaults to `/user/hive/warehouse`.
+Note that you may need to grant write privilege on `/user/hive/warehouse` to the user who starts
+the spark application.
 
 {% highlight scala %}
 // sc is an existing SparkContext.

From b2d195e137fad88d567974659fa7023ff4da96cd Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Sun, 8 Nov 2015 12:59:35 -0800
Subject: [PATCH 556/896] [SPARK-11554][SQL] add map/flatMap to GroupedDataset

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9521 from cloud-fan/map.
---
 .../plans/logical/basicOperators.scala        |  4 +-
 .../org/apache/spark/sql/GroupedDataset.scala | 29 ++++++++++++--
 .../spark/sql/execution/basicOperators.scala  |  2 +-
 .../apache/spark/sql/JavaDatasetSuite.java    | 16 ++++----
 .../spark/sql/DatasetPrimitiveSuite.scala     | 16 ++++++--
 .../org/apache/spark/sql/DatasetSuite.scala   | 40 +++++++++----------
 6 files changed, 70 insertions(+), 37 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 09aac00a455f..e151ac04ede2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -494,7 +494,7 @@ case class AppendColumn[T, U](
 /** Factory for constructing new `MapGroups` nodes. */
 object MapGroups {
   def apply[K : Encoder, T : Encoder, U : Encoder](
-      func: (K, Iterator[T]) => Iterator[U],
+      func: (K, Iterator[T]) => TraversableOnce[U],
       groupingAttributes: Seq[Attribute],
       child: LogicalPlan): MapGroups[K, T, U] = {
     new MapGroups(
@@ -514,7 +514,7 @@ object MapGroups {
  * object representation of all the rows with that key.
  */
 case class MapGroups[K, T, U](
-    func: (K, Iterator[T]) => Iterator[U],
+    func: (K, Iterator[T]) => TraversableOnce[U],
     kEncoder: ExpressionEncoder[K],
     tEncoder: ExpressionEncoder[T],
     uEncoder: ExpressionEncoder[U],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index b2803d5a9a1e..5c3f62654587 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -102,16 +102,39 @@ class GroupedDataset[K, T] private[sql](
    * (for example, by calling `toList`) unless they are sure that this is possible given the memory
    * constraints of their cluster.
    */
-  def mapGroups[U : Encoder](f: (K, Iterator[T]) => Iterator[U]): Dataset[U] = {
+  def flatMap[U : Encoder](f: (K, Iterator[T]) => TraversableOnce[U]): Dataset[U] = {
     new Dataset[U](
       sqlContext,
       MapGroups(f, groupingAttributes, logicalPlan))
   }
 
-  def mapGroups[U](
+  def flatMap[U](
       f: JFunction2[K, JIterator[T], JIterator[U]],
       encoder: Encoder[U]): Dataset[U] = {
-    mapGroups((key, data) => f.call(key, data.asJava).asScala)(encoder)
+    flatMap((key, data) => f.call(key, data.asJava).asScala)(encoder)
+  }
+
+  /**
+   * Applies the given function to each group of data.  For each unique group, the function will
+   * be passed the group key and an iterator that contains all of the elements in the group. The
+   * function can return an element of arbitrary type which will be returned as a new [[Dataset]].
+   *
+   * Internally, the implementation will spill to disk if any given group is too large to fit into
+   * memory.  However, users must take care to avoid materializing the whole iterator for a group
+   * (for example, by calling `toList`) unless they are sure that this is possible given the memory
+   * constraints of their cluster.
+   */
+  def map[U : Encoder](f: (K, Iterator[T]) => U): Dataset[U] = {
+    val func = (key: K, it: Iterator[T]) => Iterator(f(key, it))
+    new Dataset[U](
+      sqlContext,
+      MapGroups(func, groupingAttributes, logicalPlan))
+  }
+
+  def map[U](
+      f: JFunction2[K, JIterator[T], U],
+      encoder: Encoder[U]): Dataset[U] = {
+    map((key, data) => f.call(key, data.asJava))(encoder)
   }
 
   // To ensure valid overloading.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 799650a4f784..2593b16b1c8d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -356,7 +356,7 @@ case class AppendColumns[T, U](
  * being output.
  */
 case class MapGroups[K, T, U](
-    func: (K, Iterator[T]) => Iterator[U],
+    func: (K, Iterator[T]) => TraversableOnce[U],
     kEncoder: ExpressionEncoder[K],
     tEncoder: ExpressionEncoder[T],
     uEncoder: ExpressionEncoder[U],
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index a9493d576d17..0d3b1a5af52c 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -170,15 +170,15 @@ public Integer call(String v) throws Exception {
       }
     }, e.INT());
 
-    Dataset<String> mapped = grouped.mapGroups(
-      new Function2<Integer, Iterator<String>, Iterator<String>>() {
+    Dataset<String> mapped = grouped.map(
+      new Function2<Integer, Iterator<String>, String>() {
         @Override
-        public Iterator<String> call(Integer key, Iterator<String> data) throws Exception {
+        public String call(Integer key, Iterator<String> data) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
           while (data.hasNext()) {
             sb.append(data.next());
           }
-          return Collections.singletonList(sb.toString()).iterator();
+          return sb.toString();
         }
       },
       e.STRING());
@@ -224,15 +224,15 @@ public void testGroupByColumn() {
     Dataset<String> ds = context.createDataset(data, e.STRING());
     GroupedDataset<Integer, String> grouped = ds.groupBy(length(col("value"))).asKey(e.INT());
 
-    Dataset<String> mapped = grouped.mapGroups(
-      new Function2<Integer, Iterator<String>, Iterator<String>>() {
+    Dataset<String> mapped = grouped.map(
+      new Function2<Integer, Iterator<String>, String>() {
         @Override
-        public Iterator<String> call(Integer key, Iterator<String> data) throws Exception {
+        public String call(Integer key, Iterator<String> data) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
           while (data.hasNext()) {
             sb.append(data.next());
           }
-          return Collections.singletonList(sb.toString()).iterator();
+          return sb.toString();
         }
       },
       e.STRING());
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
index e3b0346f857d..fcf03f718098 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -88,16 +88,26 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
       0, 1)
   }
 
-  test("groupBy function, mapGroups") {
+  test("groupBy function, map") {
     val ds = Seq(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).toDS()
     val grouped = ds.groupBy(_ % 2)
-    val agged = grouped.mapGroups { case (g, iter) =>
+    val agged = grouped.map { case (g, iter) =>
       val name = if (g == 0) "even" else "odd"
-      Iterator((name, iter.size))
+      (name, iter.size)
     }
 
     checkAnswer(
       agged,
       ("even", 5), ("odd", 6))
   }
+
+  test("groupBy function, flatMap") {
+    val ds = Seq("a", "b", "c", "xyz", "hello").toDS()
+    val grouped = ds.groupBy(_.length)
+    val agged = grouped.flatMap { case (g, iter) => Iterator(g.toString, iter.mkString) }
+
+    checkAnswer(
+      agged,
+      "1", "abc", "3", "xyz", "5", "hello")
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index d61e17edc64e..6f1174e6577e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -198,60 +198,60 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       (1, 1))
   }
 
-  test("groupBy function, mapGroups") {
+  test("groupBy function, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
-    val agged = grouped.mapGroups { case (g, iter) =>
-      Iterator((g._1, iter.map(_._2).sum))
-    }
+    val agged = grouped.map { case (g, iter) => (g._1, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
       ("a", 30), ("b", 3), ("c", 1))
   }
 
-  test("groupBy columns, mapGroups") {
+  test("groupBy function, fatMap") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+    val grouped = ds.groupBy(v => (v._1, "word"))
+    val agged = grouped.flatMap { case (g, iter) => Iterator(g._1, iter.map(_._2).sum.toString) }
+
+    checkAnswer(
+      agged,
+      "a", "30", "b", "3", "c", "1")
+  }
+
+  test("groupBy columns, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1")
-    val agged = grouped.mapGroups { case (g, iter) =>
-      Iterator((g.getString(0), iter.map(_._2).sum))
-    }
+    val agged = grouped.map { case (g, iter) => (g.getString(0), iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
       ("a", 30), ("b", 3), ("c", 1))
   }
 
-  test("groupBy columns asKey, mapGroups") {
+  test("groupBy columns asKey, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1").asKey[String]
-    val agged = grouped.mapGroups { case (g, iter) =>
-      Iterator((g, iter.map(_._2).sum))
-    }
+    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
       ("a", 30), ("b", 3), ("c", 1))
   }
 
-  test("groupBy columns asKey tuple, mapGroups") {
+  test("groupBy columns asKey tuple, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1", lit(1)).asKey[(String, Int)]
-    val agged = grouped.mapGroups { case (g, iter) =>
-      Iterator((g, iter.map(_._2).sum))
-    }
+    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
       (("a", 1), 30), (("b", 1), 3), (("c", 1), 1))
   }
 
-  test("groupBy columns asKey class, mapGroups") {
+  test("groupBy columns asKey class, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1".as("a"), lit(1).as("b")).asKey[ClassData]
-    val agged = grouped.mapGroups { case (g, iter) =>
-      Iterator((g, iter.map(_._2).sum))
-    }
+    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,

From 97b7080cf2d2846c7257f8926f775f27d457fe7d Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sun, 8 Nov 2015 20:57:09 -0800
Subject: [PATCH 557/896] [SPARK-11564][SQL] Dataset Java API audit

A few changes:

1. Removed fold, since it can be confusing for distributed collections.
2. Created specific interfaces for each Dataset function (e.g. MapFunction, ReduceFunction, MapPartitionsFunction)
3. Added more documentation and test cases.

The other thing I'm considering doing is to have a "collector" interface for FlatMapFunction and MapPartitionsFunction, similar to MapReduce's map function.

Author: Reynold Xin <rxin@databricks.com>

Closes #9531 from rxin/SPARK-11564.
---
 .../api/java/function/FilterFunction.java     |  29 +++++
 .../api/java/function/ForeachFunction.java    |  29 +++++
 .../function/ForeachPartitionFunction.java    |  28 +++++
 .../spark/api/java/function/Function0.java    |   2 +-
 .../spark/api/java/function/MapFunction.java  |  27 +++++
 .../java/function/MapPartitionsFunction.java  |  28 +++++
 .../api/java/function/ReduceFunction.java     |  27 +++++
 .../spark/sql/catalyst/encoders/Encoder.scala |  38 +++++--
 .../org/apache/spark/sql/DataFrame.scala      |  47 ++++++--
 .../scala/org/apache/spark/sql/Dataset.scala  | 100 +++++++++---------
 .../apache/spark/sql/JavaDataFrameSuite.java  |   7 ++
 .../apache/spark/sql/JavaDatasetSuite.java    |  36 +++----
 .../spark/sql/DatasetPrimitiveSuite.scala     |   5 -
 .../org/apache/spark/sql/DatasetSuite.scala   |  10 +-
 14 files changed, 316 insertions(+), 97 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/FilterFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/ForeachFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/ForeachPartitionFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/MapFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/MapPartitionsFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/ReduceFunction.java

diff --git a/core/src/main/java/org/apache/spark/api/java/function/FilterFunction.java b/core/src/main/java/org/apache/spark/api/java/function/FilterFunction.java
new file mode 100644
index 000000000000..e8d999dd0013
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/FilterFunction.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * Base interface for a function used in Dataset's filter function.
+ *
+ * If the function returns true, the element is discarded in the returned Dataset.
+ */
+public interface FilterFunction<T> extends Serializable {
+  boolean call(T value) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/ForeachFunction.java b/core/src/main/java/org/apache/spark/api/java/function/ForeachFunction.java
new file mode 100644
index 000000000000..07e54b28fa12
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/ForeachFunction.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * Base interface for a function used in Dataset's foreach function.
+ *
+ * Spark will invoke the call function on each element in the input Dataset.
+ */
+public interface ForeachFunction<T> extends Serializable {
+  void call(T t) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/ForeachPartitionFunction.java b/core/src/main/java/org/apache/spark/api/java/function/ForeachPartitionFunction.java
new file mode 100644
index 000000000000..4938a51bcd71
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/ForeachPartitionFunction.java
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+/**
+ * Base interface for a function used in Dataset's foreachPartition function.
+ */
+public interface ForeachPartitionFunction<T> extends Serializable {
+  void call(Iterator<T> t) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/Function0.java b/core/src/main/java/org/apache/spark/api/java/function/Function0.java
index 38e410c5debe..c86928dd0540 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/Function0.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/Function0.java
@@ -23,5 +23,5 @@
  * A zero-argument function that returns an R.
  */
 public interface Function0<R> extends Serializable {
-  public R call() throws Exception;
+  R call() throws Exception;
 }
diff --git a/core/src/main/java/org/apache/spark/api/java/function/MapFunction.java b/core/src/main/java/org/apache/spark/api/java/function/MapFunction.java
new file mode 100644
index 000000000000..3ae6ef44898e
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/MapFunction.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * Base interface for a map function used in Dataset's map function.
+ */
+public interface MapFunction<T, U> extends Serializable {
+  U call(T value) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/MapPartitionsFunction.java b/core/src/main/java/org/apache/spark/api/java/function/MapPartitionsFunction.java
new file mode 100644
index 000000000000..6cb569ce0cb6
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/MapPartitionsFunction.java
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+/**
+ * Base interface for function used in Dataset's mapPartitions.
+ */
+public interface MapPartitionsFunction<T, U> extends Serializable {
+  Iterable<U> call(Iterator<T> input) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/ReduceFunction.java b/core/src/main/java/org/apache/spark/api/java/function/ReduceFunction.java
new file mode 100644
index 000000000000..ee092d0058f4
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/ReduceFunction.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * Base interface for function used in Dataset's reduce.
+ */
+public interface ReduceFunction<T> extends Serializable {
+  T call(T v1, T v2) throws Exception;
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
index f05e18288de2..6569b900fed9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql.catalyst.encoders
 import scala.reflect.ClassTag
 
 import org.apache.spark.util.Utils
-import org.apache.spark.sql.types.{DataType, ObjectType, StructField, StructType}
+import org.apache.spark.sql.types.{ObjectType, StructField, StructType}
 import org.apache.spark.sql.catalyst.expressions._
 
 /**
@@ -100,7 +100,7 @@ object Encoder {
       expr.transformUp {
         case BoundReference(0, t: ObjectType, _) =>
           Invoke(
-            BoundReference(0, ObjectType(cls), true),
+            BoundReference(0, ObjectType(cls), nullable = true),
             s"_${index + 1}",
             t)
       }
@@ -114,13 +114,13 @@ object Encoder {
       } else {
         enc.constructExpression.transformUp {
           case BoundReference(ordinal, dt, _) =>
-            GetInternalRowField(BoundReference(index, enc.schema, true), ordinal, dt)
+            GetInternalRowField(BoundReference(index, enc.schema, nullable = true), ordinal, dt)
         }
       }
     }
 
     val constructExpression =
-      NewInstance(cls, constructExpressions, false, ObjectType(cls))
+      NewInstance(cls, constructExpressions, propagateNull = false, ObjectType(cls))
 
     new ExpressionEncoder[Any](
       schema,
@@ -130,7 +130,6 @@ object Encoder {
       ClassTag.apply(cls))
   }
 
-
   def typeTagOfTuple2[T1 : TypeTag, T2 : TypeTag]: TypeTag[(T1, T2)] = typeTag[(T1, T2)]
 
   private def getTypeTag[T](c: Class[T]): TypeTag[T] = {
@@ -148,9 +147,36 @@ object Encoder {
     })
   }
 
-  def forTuple2[T1, T2](c1: Class[T1], c2: Class[T2]): Encoder[(T1, T2)] = {
+  def forTuple[T1, T2](c1: Class[T1], c2: Class[T2]): Encoder[(T1, T2)] = {
     implicit val typeTag1 = getTypeTag(c1)
     implicit val typeTag2 = getTypeTag(c2)
     ExpressionEncoder[(T1, T2)]()
   }
+
+  def forTuple[T1, T2, T3](c1: Class[T1], c2: Class[T2], c3: Class[T3]): Encoder[(T1, T2, T3)] = {
+    implicit val typeTag1 = getTypeTag(c1)
+    implicit val typeTag2 = getTypeTag(c2)
+    implicit val typeTag3 = getTypeTag(c3)
+    ExpressionEncoder[(T1, T2, T3)]()
+  }
+
+  def forTuple[T1, T2, T3, T4](
+      c1: Class[T1], c2: Class[T2], c3: Class[T3], c4: Class[T4]): Encoder[(T1, T2, T3, T4)] = {
+    implicit val typeTag1 = getTypeTag(c1)
+    implicit val typeTag2 = getTypeTag(c2)
+    implicit val typeTag3 = getTypeTag(c3)
+    implicit val typeTag4 = getTypeTag(c4)
+    ExpressionEncoder[(T1, T2, T3, T4)]()
+  }
+
+  def forTuple[T1, T2, T3, T4, T5](
+      c1: Class[T1], c2: Class[T2], c3: Class[T3], c4: Class[T4], c5: Class[T5])
+    : Encoder[(T1, T2, T3, T4, T5)] = {
+    implicit val typeTag1 = getTypeTag(c1)
+    implicit val typeTag2 = getTypeTag(c2)
+    implicit val typeTag3 = getTypeTag(c3)
+    implicit val typeTag4 = getTypeTag(c4)
+    implicit val typeTag5 = getTypeTag(c5)
+    ExpressionEncoder[(T1, T2, T3, T4, T5)]()
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index f2d4db555027..8ab958adadcc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1478,18 +1478,54 @@ class DataFrame private[sql](
 
   /**
    * Returns the first `n` rows in the [[DataFrame]].
+   *
+   * Running take requires moving data into the application's driver process, and doing so on a
+   * very large dataset can crash the driver process with OutOfMemoryError.
+   *
    * @group action
    * @since 1.3.0
    */
   def take(n: Int): Array[Row] = head(n)
 
+  /**
+   * Returns the first `n` rows in the [[DataFrame]] as a list.
+   *
+   * Running take requires moving data into the application's driver process, and doing so with
+   * a very large `n` can crash the driver process with OutOfMemoryError.
+   *
+   * @group action
+   * @since 1.6.0
+   */
+  def takeAsList(n: Int): java.util.List[Row] = java.util.Arrays.asList(take(n) : _*)
+
   /**
    * Returns an array that contains all of [[Row]]s in this [[DataFrame]].
+   *
+   * Running take requires moving data into the application's driver process, and doing so with
+   * a very large `n` can crash the driver process with OutOfMemoryError.
+   *
+   * For Java API, use [[collectAsList]].
+   *
    * @group action
    * @since 1.3.0
    */
   def collect(): Array[Row] = collect(needCallback = true)
 
+  /**
+   * Returns a Java list that contains all of [[Row]]s in this [[DataFrame]].
+   *
+   * Running collect requires moving all the data into the application's driver process, and
+   * doing so on a very large dataset can crash the driver process with OutOfMemoryError.
+   *
+   * @group action
+   * @since 1.3.0
+   */
+  def collectAsList(): java.util.List[Row] = withCallback("collectAsList", this) { _ =>
+    withNewExecutionId {
+      java.util.Arrays.asList(rdd.collect() : _*)
+    }
+  }
+
   private def collect(needCallback: Boolean): Array[Row] = {
     def execute(): Array[Row] = withNewExecutionId {
       queryExecution.executedPlan.executeCollectPublic()
@@ -1502,17 +1538,6 @@ class DataFrame private[sql](
     }
   }
 
-  /**
-   * Returns a Java list that contains all of [[Row]]s in this [[DataFrame]].
-   * @group action
-   * @since 1.3.0
-   */
-  def collectAsList(): java.util.List[Row] = withCallback("collectAsList", this) { _ =>
-    withNewExecutionId {
-      java.util.Arrays.asList(rdd.collect() : _*)
-    }
-  }
-
   /**
    * Returns the number of rows in the [[DataFrame]].
    * @group action
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index fecbdac9a600..959e0f5ba03e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -22,7 +22,7 @@ import scala.collection.JavaConverters._
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
-import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2, _}
+import org.apache.spark.api.java.function._
 
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
@@ -75,7 +75,11 @@ class Dataset[T] private[sql](
   private[sql] def this(sqlContext: SQLContext, plan: LogicalPlan)(implicit encoder: Encoder[T]) =
     this(sqlContext, new QueryExecution(sqlContext, plan), encoder)
 
-  /** Returns the schema of the encoded form of the objects in this [[Dataset]]. */
+  /**
+   * Returns the schema of the encoded form of the objects in this [[Dataset]].
+   *
+   * @since 1.6.0
+   */
   def schema: StructType = encoder.schema
 
   /* ************* *
@@ -103,6 +107,7 @@ class Dataset[T] private[sql](
   /**
    * Applies a logical alias to this [[Dataset]] that can be used to disambiguate columns that have
    * the same name after two Datasets have been joined.
+   * @since 1.6.0
    */
   def as(alias: String): Dataset[T] = withPlan(Subquery(alias, _))
 
@@ -166,8 +171,7 @@ class Dataset[T] private[sql](
    * Returns a new [[Dataset]] that only contains elements where `func` returns `true`.
    * @since 1.6.0
    */
-  def filter(func: JFunction[T, java.lang.Boolean]): Dataset[T] =
-    filter(t => func.call(t).booleanValue())
+  def filter(func: FilterFunction[T]): Dataset[T] = filter(t => func.call(t))
 
   /**
    * (Scala-specific)
@@ -181,7 +185,7 @@ class Dataset[T] private[sql](
    * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
    * @since 1.6.0
    */
-  def map[U](func: JFunction[T, U], encoder: Encoder[U]): Dataset[U] =
+  def map[U](func: MapFunction[T, U], encoder: Encoder[U]): Dataset[U] =
     map(t => func.call(t))(encoder)
 
   /**
@@ -205,10 +209,8 @@ class Dataset[T] private[sql](
    * Returns a new [[Dataset]] that contains the result of applying `func` to each element.
    * @since 1.6.0
    */
-  def mapPartitions[U](
-      f: FlatMapFunction[java.util.Iterator[T], U],
-      encoder: Encoder[U]): Dataset[U] = {
-    val func: (Iterator[T]) => Iterator[U] = x => f.call(x.asJava).iterator().asScala
+  def mapPartitions[U](f: MapPartitionsFunction[T, U], encoder: Encoder[U]): Dataset[U] = {
+    val func: (Iterator[T]) => Iterator[U] = x => f.call(x.asJava).iterator.asScala
     mapPartitions(func)(encoder)
   }
 
@@ -248,7 +250,7 @@ class Dataset[T] private[sql](
    * Runs `func` on each element of this Dataset.
    * @since 1.6.0
    */
-  def foreach(func: VoidFunction[T]): Unit = foreach(func.call(_))
+  def foreach(func: ForeachFunction[T]): Unit = foreach(func.call(_))
 
   /**
    * (Scala-specific)
@@ -262,7 +264,7 @@ class Dataset[T] private[sql](
    * Runs `func` on each partition of this Dataset.
    * @since 1.6.0
    */
-  def foreachPartition(func: VoidFunction[java.util.Iterator[T]]): Unit =
+  def foreachPartition(func: ForeachPartitionFunction[T]): Unit =
     foreachPartition(it => func.call(it.asJava))
 
   /* ************* *
@@ -271,7 +273,7 @@ class Dataset[T] private[sql](
 
   /**
    * (Scala-specific)
-   * Reduces the elements of this Dataset using the specified  binary function.  The given function
+   * Reduces the elements of this Dataset using the specified binary function.  The given function
    * must be commutative and associative or the result may be non-deterministic.
    * @since 1.6.0
    */
@@ -279,33 +281,11 @@ class Dataset[T] private[sql](
 
   /**
    * (Java-specific)
-   * Reduces the elements of this Dataset using the specified  binary function.  The given function
+   * Reduces the elements of this Dataset using the specified binary function.  The given function
    * must be commutative and associative or the result may be non-deterministic.
    * @since 1.6.0
    */
-  def reduce(func: JFunction2[T, T, T]): T = reduce(func.call(_, _))
-
-  /**
-   * (Scala-specific)
-   * Aggregates the elements of each partition, and then the results for all the partitions, using a
-   * given associative and commutative function and a neutral "zero value".
-   *
-   * This behaves somewhat differently than the fold operations implemented for non-distributed
-   * collections in functional languages like Scala. This fold operation may be applied to
-   * partitions individually, and then those results will be folded into the final result.
-   * If op is not commutative, then the result may differ from that of a fold applied to a
-   * non-distributed collection.
-   * @since 1.6.0
-   */
-  def fold(zeroValue: T)(op: (T, T) => T): T = rdd.fold(zeroValue)(op)
-
-  /**
-   * (Java-specific)
-   * Aggregates the elements of each partition, and then the results for all the partitions, using a
-   * given associative and commutative function and a neutral "zero value".
-   * @since 1.6.0
-   */
-  def fold(zeroValue: T, func: JFunction2[T, T, T]): T = fold(zeroValue)(func.call(_, _))
+  def reduce(func: ReduceFunction[T]): T = reduce(func.call(_, _))
 
   /**
    * (Scala-specific)
@@ -351,7 +331,7 @@ class Dataset[T] private[sql](
    * Returns a [[GroupedDataset]] where the data is grouped by the given key function.
    * @since 1.6.0
    */
-  def groupBy[K](f: JFunction[T, K], encoder: Encoder[K]): GroupedDataset[K, T] =
+  def groupBy[K](f: MapFunction[T, K], encoder: Encoder[K]): GroupedDataset[K, T] =
     groupBy(f.call(_))(encoder)
 
   /* ****************** *
@@ -367,7 +347,7 @@ class Dataset[T] private[sql](
    */
   // Copied from Dataframe to make sure we don't have invalid overloads.
   @scala.annotation.varargs
-  def select(cols: Column*): DataFrame = toDF().select(cols: _*)
+  protected def select(cols: Column*): DataFrame = toDF().select(cols: _*)
 
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expression for each element.
@@ -462,8 +442,7 @@ class Dataset[T] private[sql](
    * and thus is not affected by a custom `equals` function defined on `T`.
    * @since 1.6.0
    */
-  def intersect(other: Dataset[T]): Dataset[T] =
-    withPlan[T](other)(Intersect)
+  def intersect(other: Dataset[T]): Dataset[T] = withPlan[T](other)(Intersect)
 
   /**
    * Returns a new [[Dataset]] that contains the elements of both this and the `other` [[Dataset]]
@@ -473,8 +452,7 @@ class Dataset[T] private[sql](
    * duplicate items.  As such, it is analagous to `UNION ALL` in SQL.
    * @since 1.6.0
    */
-  def union(other: Dataset[T]): Dataset[T] =
-    withPlan[T](other)(Union)
+  def union(other: Dataset[T]): Dataset[T] = withPlan[T](other)(Union)
 
   /**
    * Returns a new [[Dataset]] where any elements present in `other` have been removed.
@@ -542,27 +520,47 @@ class Dataset[T] private[sql](
   def first(): T = rdd.first()
 
   /**
-   * Collects the elements to an Array.
+   * Returns an array that contains all the elements in this [[Dataset]].
+   *
+   * Running collect requires moving all the data into the application's driver process, and
+   * doing so on a very large dataset can crash the driver process with OutOfMemoryError.
+   *
+   * For Java API, use [[collectAsList]].
    * @since 1.6.0
    */
   def collect(): Array[T] = rdd.collect()
 
   /**
-   * (Java-specific)
-   * Collects the elements to a Java list.
+   * Returns an array that contains all the elements in this [[Dataset]].
    *
-   * Due to the incompatibility problem between Scala and Java, the return type of [[collect()]] at
-   * Java side is `java.lang.Object`, which is not easy to use.  Java user can use this method
-   * instead and keep the generic type for result.
+   * Running collect requires moving all the data into the application's driver process, and
+   * doing so on a very large dataset can crash the driver process with OutOfMemoryError.
    *
+   * For Java API, use [[collectAsList]].
    * @since 1.6.0
    */
-  def collectAsList(): java.util.List[T] =
-    rdd.collect().toSeq.asJava
+  def collectAsList(): java.util.List[T] = rdd.collect().toSeq.asJava
 
-  /** Returns the first `num` elements of this [[Dataset]] as an Array. */
+  /**
+   * Returns the first `num` elements of this [[Dataset]] as an array.
+   *
+   * Running take requires moving data into the application's driver process, and doing so with
+   * a very large `n` can crash the driver process with OutOfMemoryError.
+   *
+   * @since 1.6.0
+   */
   def take(num: Int): Array[T] = rdd.take(num)
 
+  /**
+   * Returns the first `num` elements of this [[Dataset]] as an array.
+   *
+   * Running take requires moving data into the application's driver process, and doing so with
+   * a very large `n` can crash the driver process with OutOfMemoryError.
+   *
+   * @since 1.6.0
+   */
+  def takeAsList(num: Int): java.util.List[T] = java.util.Arrays.asList(take(num) : _*)
+
   /* ******************** *
    *  Internal Functions  *
    * ******************** */
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index 40bff57a17a0..d191b50fa802 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -65,6 +65,13 @@ public void testExecution() {
     Assert.assertEquals(1, df.select("key").collect()[0].get(0));
   }
 
+  @Test
+  public void testCollectAndTake() {
+    DataFrame df = context.table("testData").filter("key = 1 or key = 2 or key = 3");
+    Assert.assertEquals(3, df.select("key").collectAsList().size());
+    Assert.assertEquals(2, df.select("key").takeAsList(2).size());
+  }
+
   /**
    * See SPARK-5904. Abstract vararg methods defined in Scala do not work in Java.
    */
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 0d3b1a5af52c..0f90de774dd3 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -68,8 +68,16 @@ private <T1, T2> Tuple2<T1, T2> tuple2(T1 t1, T2 t2) {
   public void testCollect() {
     List<String> data = Arrays.asList("hello", "world");
     Dataset<String> ds = context.createDataset(data, e.STRING());
-    String[] collected = (String[]) ds.collect();
-    Assert.assertEquals(Arrays.asList("hello", "world"), Arrays.asList(collected));
+    List<String> collected = ds.collectAsList();
+    Assert.assertEquals(Arrays.asList("hello", "world"), collected);
+  }
+
+  @Test
+  public void testTake() {
+    List<String> data = Arrays.asList("hello", "world");
+    Dataset<String> ds = context.createDataset(data, e.STRING());
+    List<String> collected = ds.takeAsList(1);
+    Assert.assertEquals(Arrays.asList("hello"), collected);
   }
 
   @Test
@@ -78,16 +86,16 @@ public void testCommonOperation() {
     Dataset<String> ds = context.createDataset(data, e.STRING());
     Assert.assertEquals("hello", ds.first());
 
-    Dataset<String> filtered = ds.filter(new Function<String, Boolean>() {
+    Dataset<String> filtered = ds.filter(new FilterFunction<String>() {
       @Override
-      public Boolean call(String v) throws Exception {
+      public boolean call(String v) throws Exception {
         return v.startsWith("h");
       }
     });
     Assert.assertEquals(Arrays.asList("hello"), filtered.collectAsList());
 
 
-    Dataset<Integer> mapped = ds.map(new Function<String, Integer>() {
+    Dataset<Integer> mapped = ds.map(new MapFunction<String, Integer>() {
       @Override
       public Integer call(String v) throws Exception {
         return v.length();
@@ -95,7 +103,7 @@ public Integer call(String v) throws Exception {
     }, e.INT());
     Assert.assertEquals(Arrays.asList(5, 5), mapped.collectAsList());
 
-    Dataset<String> parMapped = ds.mapPartitions(new FlatMapFunction<Iterator<String>, String>() {
+    Dataset<String> parMapped = ds.mapPartitions(new MapPartitionsFunction<String, String>() {
       @Override
       public Iterable<String> call(Iterator<String> it) throws Exception {
         List<String> ls = new LinkedList<String>();
@@ -128,7 +136,7 @@ public void testForeach() {
     List<String> data = Arrays.asList("a", "b", "c");
     Dataset<String> ds = context.createDataset(data, e.STRING());
 
-    ds.foreach(new VoidFunction<String>() {
+    ds.foreach(new ForeachFunction<String>() {
       @Override
       public void call(String s) throws Exception {
         accum.add(1);
@@ -142,28 +150,20 @@ public void testReduce() {
     List<Integer> data = Arrays.asList(1, 2, 3);
     Dataset<Integer> ds = context.createDataset(data, e.INT());
 
-    int reduced = ds.reduce(new Function2<Integer, Integer, Integer>() {
+    int reduced = ds.reduce(new ReduceFunction<Integer>() {
       @Override
       public Integer call(Integer v1, Integer v2) throws Exception {
         return v1 + v2;
       }
     });
     Assert.assertEquals(6, reduced);
-
-    int folded = ds.fold(1, new Function2<Integer, Integer, Integer>() {
-      @Override
-      public Integer call(Integer v1, Integer v2) throws Exception {
-        return v1 * v2;
-      }
-    });
-    Assert.assertEquals(6, folded);
   }
 
   @Test
   public void testGroupBy() {
     List<String> data = Arrays.asList("a", "foo", "bar");
     Dataset<String> ds = context.createDataset(data, e.STRING());
-    GroupedDataset<Integer, String> grouped = ds.groupBy(new Function<String, Integer>() {
+    GroupedDataset<Integer, String> grouped = ds.groupBy(new MapFunction<String, Integer>() {
       @Override
       public Integer call(String v) throws Exception {
         return v.length();
@@ -187,7 +187,7 @@ public String call(Integer key, Iterator<String> data) throws Exception {
 
     List<Integer> data2 = Arrays.asList(2, 6, 10);
     Dataset<Integer> ds2 = context.createDataset(data2, e.INT());
-    GroupedDataset<Integer, Integer> grouped2 = ds2.groupBy(new Function<Integer, Integer>() {
+    GroupedDataset<Integer, Integer> grouped2 = ds2.groupBy(new MapFunction<Integer, Integer>() {
       @Override
       public Integer call(Integer v) throws Exception {
         return v / 2;
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
index fcf03f718098..63b00975e4eb 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -75,11 +75,6 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
     assert(ds.reduce(_ + _) == 6)
   }
 
-  test("fold") {
-    val ds = Seq(1, 2, 3).toDS()
-    assert(ds.fold(0)(_ + _) == 6)
-  }
-
   test("groupBy function, keys") {
     val ds = Seq(1, 2, 3, 4, 5).toDS()
     val grouped = ds.groupBy(_ % 2)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 6f1174e6577e..aea5a700d020 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -61,6 +61,11 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     assert(ds.collect() === Array(ClassData("a", 1), ClassData("b", 2), ClassData("c", 3)))
   }
 
+  test("as case class - take") {
+    val ds = Seq((1, "a"), (2, "b"), (3, "c")).toDF("b", "a").as[ClassData]
+    assert(ds.take(2) === Array(ClassData("a", 1), ClassData("b", 2)))
+  }
+
   test("map") {
     val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
     checkAnswer(
@@ -137,11 +142,6 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     assert(ds.reduce((a, b) => ("sum", a._2 + b._2)) == ("sum", 6))
   }
 
-  test("fold") {
-    val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
-    assert(ds.fold(("", 0))((a, b) => ("sum", a._2 + b._2)) == ("sum", 6))
-  }
-
   test("joinWith, flat schema") {
     val ds1 = Seq(1, 2, 3).toDS().as("a")
     val ds2 = Seq(1, 2).toDS().as("b")

From d8b50f70298dbf45e91074ee2d751fee7eecb119 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Sun, 8 Nov 2015 21:01:53 -0800
Subject: [PATCH 558/896] [SPARK-11453][SQL] append data to partitioned table
 will messes up the result

The reason is that:

1. For partitioned hive table, we will move the partitioned columns after data columns. (e.g. `<a: Int, b: Int>` partition by `a` will become `<b: Int, a: Int>`)
2. When append data to table, we use position to figure out how to match input columns to table's columns.

So when we append data to partitioned table, we will match wrong columns between input and table. A solution is reordering the input columns before match by position, like what we did for [`InsertIntoHadoopFsRelation`](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/InsertIntoHadoopFsRelation.scala#L101-L105)

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9408 from cloud-fan/append.
---
 .../apache/spark/sql/DataFrameWriter.scala    | 29 ++++++++++++++++---
 .../sql/sources/PartitionedWriteSuite.scala   |  8 +++++
 .../sql/hive/execution/SQLQuerySuite.scala    | 20 +++++++++++++
 3 files changed, 53 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
index 7887e559a302..e63a4d5e8b10 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
@@ -23,8 +23,8 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.{SqlParser, TableIdentifier}
-import org.apache.spark.sql.catalyst.analysis.UnresolvedRelation
-import org.apache.spark.sql.catalyst.plans.logical.InsertIntoTable
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, UnresolvedRelation}
+import org.apache.spark.sql.catalyst.plans.logical.{Project, InsertIntoTable}
 import org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, ResolvedDataSource}
 import org.apache.spark.sql.sources.HadoopFsRelation
@@ -167,17 +167,38 @@ final class DataFrameWriter private[sql](df: DataFrame) {
   }
 
   private def insertInto(tableIdent: TableIdentifier): Unit = {
-    val partitions = partitioningColumns.map(_.map(col => col -> (None: Option[String])).toMap)
+    val partitions = normalizedParCols.map(_.map(col => col -> (None: Option[String])).toMap)
     val overwrite = mode == SaveMode.Overwrite
+
+    // A partitioned relation's schema can be different from the input logicalPlan, since
+    // partition columns are all moved after data columns. We Project to adjust the ordering.
+    // TODO: this belongs to the analyzer.
+    val input = normalizedParCols.map { parCols =>
+      val (inputPartCols, inputDataCols) = df.logicalPlan.output.partition { attr =>
+        parCols.contains(attr.name)
+      }
+      Project(inputDataCols ++ inputPartCols, df.logicalPlan)
+    }.getOrElse(df.logicalPlan)
+
     df.sqlContext.executePlan(
       InsertIntoTable(
         UnresolvedRelation(tableIdent),
         partitions.getOrElse(Map.empty[String, Option[String]]),
-        df.logicalPlan,
+        input,
         overwrite,
         ifNotExists = false)).toRdd
   }
 
+  private def normalizedParCols: Option[Seq[String]] = partitioningColumns.map { parCols =>
+    parCols.map { col =>
+      df.logicalPlan.output
+        .map(_.name)
+        .find(df.sqlContext.analyzer.resolver(_, col))
+        .getOrElse(throw new AnalysisException(s"Partition column $col not found in existing " +
+          s"columns (${df.logicalPlan.output.map(_.name).mkString(", ")})"))
+    }
+  }
+
   /**
    * Saves the content of the [[DataFrame]] as the specified table.
    *
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/sources/PartitionedWriteSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/sources/PartitionedWriteSuite.scala
index c9791879ec74..3eaa817f9c0b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/sources/PartitionedWriteSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/sources/PartitionedWriteSuite.scala
@@ -53,4 +53,12 @@ class PartitionedWriteSuite extends QueryTest with SharedSQLContext {
 
     Utils.deleteRecursively(path)
   }
+
+  test("partitioned columns should appear at the end of schema") {
+    withTempPath { f =>
+      val path = f.getAbsolutePath
+      Seq(1 -> "a").toDF("i", "j").write.partitionBy("i").parquet(path)
+      assert(sqlContext.read.parquet(path).schema.map(_.name) == Seq("j", "i"))
+    }
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index af48d478953b..9a425d7f6b26 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1428,4 +1428,24 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       checkAnswer(sql("SELECT val FROM tbl10562 WHERE Year == 2012"), Row("a"))
     }
   }
+
+  test("SPARK-11453: append data to partitioned table") {
+    withTable("tbl11453") {
+      Seq("1" -> "10", "2" -> "20").toDF("i", "j")
+        .write.partitionBy("i").saveAsTable("tbl11453")
+
+      Seq("3" -> "30").toDF("i", "j")
+        .write.mode(SaveMode.Append).partitionBy("i").saveAsTable("tbl11453")
+      checkAnswer(
+        sqlContext.read.table("tbl11453").select("i", "j").orderBy("i"),
+        Row("1", "10") :: Row("2", "20") :: Row("3", "30") :: Nil)
+
+      // make sure case sensitivity is correct.
+      Seq("4" -> "40").toDF("i", "j")
+        .write.mode(SaveMode.Append).partitionBy("I").saveAsTable("tbl11453")
+      checkAnswer(
+        sqlContext.read.table("tbl11453").select("i", "j").orderBy("i"),
+        Row("1", "10") :: Row("2", "20") :: Row("3", "30") :: Row("4", "40") :: Nil)
+    }
+  }
 }

From 9e48cdfbdecc9554a425ba35c0252910fd1e8faa Mon Sep 17 00:00:00 2001
From: Charles Yeh <charlesyeh@dropbox.com>
Date: Mon, 9 Nov 2015 13:22:05 +0100
Subject: [PATCH 559/896] [SPARK-11218][CORE] show help messages for
 start-slave and start-master

Addressing https://issues.apache.org/jira/browse/SPARK-11218, mostly copied start-thriftserver.sh.
```
charlesyeh-mbp:spark charlesyeh$ ./sbin/start-master.sh --help
Usage: Master [options]

Options:
  -i HOST, --ip HOST     Hostname to listen on (deprecated, please use --host or -h)
  -h HOST, --host HOST   Hostname to listen on
  -p PORT, --port PORT   Port to listen on (default: 7077)
  --webui-port PORT      Port for web UI (default: 8080)
  --properties-file FILE Path to a custom Spark properties file.
                         Default is conf/spark-defaults.conf.
```
```
charlesyeh-mbp:spark charlesyeh$ ./sbin/start-slave.sh
Usage: Worker [options] <master>

Master must be a URL of the form spark://hostname:port

Options:
  -c CORES, --cores CORES  Number of cores to use
  -m MEM, --memory MEM     Amount of memory to use (e.g. 1000M, 2G)
  -d DIR, --work-dir DIR   Directory to run apps in (default: SPARK_HOME/work)
  -i HOST, --ip IP         Hostname to listen on (deprecated, please use --host or -h)
  -h HOST, --host HOST     Hostname to listen on
  -p PORT, --port PORT     Port to listen on (default: random)
  --webui-port PORT        Port for web UI (default: 8081)
  --properties-file FILE   Path to a custom Spark properties file.
                           Default is conf/spark-defaults.conf.
```

Author: Charles Yeh <charlesyeh@dropbox.com>

Closes #9432 from CharlesYeh/helpmsg.
---
 sbin/start-master.sh | 24 +++++++++++++++++++-----
 sbin/start-slave.sh  | 24 +++++++++++++++---------
 2 files changed, 34 insertions(+), 14 deletions(-)

diff --git a/sbin/start-master.sh b/sbin/start-master.sh
index c20e19a8412d..9f2e14dff609 100755
--- a/sbin/start-master.sh
+++ b/sbin/start-master.sh
@@ -23,6 +23,20 @@ if [ -z "${SPARK_HOME}" ]; then
   export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
 fi
 
+# NOTE: This exact class name is matched downstream by SparkSubmit.
+# Any changes need to be reflected there.
+CLASS="org.apache.spark.deploy.master.Master"
+
+if [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
+  echo "Usage: ./sbin/start-master.sh [options]"
+  pattern="Usage:"
+  pattern+="\|Using Spark's default log4j profile:"
+  pattern+="\|Registered signal handlers for"
+
+  "${SPARK_HOME}"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
+  exit 1
+fi
+
 ORIGINAL_ARGS="$@"
 
 START_TACHYON=false
@@ -30,7 +44,7 @@ START_TACHYON=false
 while (( "$#" )); do
 case $1 in
     --with-tachyon)
-      if [ ! -e "$sbin"/../tachyon/bin/tachyon ]; then
+      if [ ! -e "${SPARK_HOME}"/tachyon/bin/tachyon ]; then
         echo "Error: --with-tachyon specified, but tachyon not found."
         exit -1
       fi
@@ -56,12 +70,12 @@ if [ "$SPARK_MASTER_WEBUI_PORT" = "" ]; then
   SPARK_MASTER_WEBUI_PORT=8080
 fi
 
-"${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.master.Master 1 \
+"${SPARK_HOME}/sbin"/spark-daemon.sh start $CLASS 1 \
   --ip $SPARK_MASTER_IP --port $SPARK_MASTER_PORT --webui-port $SPARK_MASTER_WEBUI_PORT \
   $ORIGINAL_ARGS
 
 if [ "$START_TACHYON" == "true" ]; then
-  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon bootstrap-conf $SPARK_MASTER_IP
-  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon format -s
-  "${SPARK_HOME}/sbin"/../tachyon/bin/tachyon-start.sh master
+  "${SPARK_HOME}"/tachyon/bin/tachyon bootstrap-conf $SPARK_MASTER_IP
+  "${SPARK_HOME}"/tachyon/bin/tachyon format -s
+  "${SPARK_HOME}"/tachyon/bin/tachyon-start.sh master
 fi
diff --git a/sbin/start-slave.sh b/sbin/start-slave.sh
index 21455648d1c6..8c268b885915 100755
--- a/sbin/start-slave.sh
+++ b/sbin/start-slave.sh
@@ -31,18 +31,24 @@
 #                           worker.  Subsequent workers will increment this
 #                           number.  Default is 8081.
 
-usage="Usage: start-slave.sh <spark-master-URL> where <spark-master-URL> is like spark://localhost:7077"
-
-if [ $# -lt 1 ]; then
-  echo $usage
-  echo Called as start-slave.sh $*
-  exit 1
-fi
-
 if [ -z "${SPARK_HOME}" ]; then
   export SPARK_HOME="$(cd "`dirname "$0"`"/..; pwd)"
 fi
 
+# NOTE: This exact class name is matched downstream by SparkSubmit.
+# Any changes need to be reflected there.
+CLASS="org.apache.spark.deploy.worker.Worker"
+
+if [[ $# -lt 1 ]] || [[ "$@" = *--help ]] || [[ "$@" = *-h ]]; then
+  echo "Usage: ./sbin/start-slave.sh [options] <master>"
+  pattern="Usage:"
+  pattern+="\|Using Spark's default log4j profile:"
+  pattern+="\|Registered signal handlers for"
+
+  "${SPARK_HOME}"/bin/spark-class $CLASS --help 2>&1 | grep -v "$pattern" 1>&2
+  exit 1
+fi
+
 . "${SPARK_HOME}/sbin/spark-config.sh"
 
 . "${SPARK_HOME}/bin/load-spark-env.sh"
@@ -72,7 +78,7 @@ function start_instance {
   fi
   WEBUI_PORT=$(( $SPARK_WORKER_WEBUI_PORT + $WORKER_NUM - 1 ))
 
-  "${SPARK_HOME}/sbin"/spark-daemon.sh start org.apache.spark.deploy.worker.Worker $WORKER_NUM \
+  "${SPARK_HOME}/sbin"/spark-daemon.sh start $CLASS $WORKER_NUM \
      --webui-port "$WEBUI_PORT" $PORT_FLAG $PORT_NUM $MASTER "$@"
 }
 

From b541b31630b1b85b48d6096079d073ccf46a62e8 Mon Sep 17 00:00:00 2001
From: Rohit Agarwal <mindprince@gmail.com>
Date: Mon, 9 Nov 2015 13:28:00 +0100
Subject: [PATCH 560/896] [DOC][MINOR][SQL] Fix internal link

It doesn't show up as a hyperlink currently. It will show up as a hyperlink after this change.

Author: Rohit Agarwal <mindprince@gmail.com>

Closes #9544 from mindprince/patch-2.
---
 docs/sql-programming-guide.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 52e03b951f96..ccd26904329d 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -2287,7 +2287,7 @@ Several caching related features are not supported yet:
 Spark SQL is designed to be compatible with the Hive Metastore, SerDes and UDFs.
 Currently Hive SerDes and UDFs are based on Hive 1.2.1,
 and Spark SQL can be connected to different versions of Hive Metastore
-(from 0.12.0 to 1.2.1. Also see http://spark.apache.org/docs/latest/sql-programming-guide.html#interacting-with-different-versions-of-hive-metastore).
+(from 0.12.0 to 1.2.1. Also see [Interacting with Different Versions of Hive Metastore] (#interacting-with-different-versions-of-hive-metastore)).
 
 #### Deploying in Existing Hive Warehouses
 

From 8c0e1b50e960d3e8e51d0618c462eed2bb4936f0 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Mon, 9 Nov 2015 08:56:22 -0800
Subject: [PATCH 561/896] [SPARK-11494][ML][R] Expose R-like summary statistics
 in SparkR::glm for linear regression

Expose R-like summary statistics in SparkR::glm for linear regression, the output of ```summary``` like
```Java
$DevianceResiduals
 Min        Max
 -0.9509607 0.7291832

$Coefficients
                   Estimate   Std. Error t value   Pr(>|t|)
(Intercept)        1.6765     0.2353597  7.123139  4.456124e-11
Sepal_Length       0.3498801  0.04630128 7.556598  4.187317e-12
Species_versicolor -0.9833885 0.07207471 -13.64402 0
Species_virginica  -1.00751   0.09330565 -10.79796 0
```

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9561 from yanboliang/spark-11494.
---
 R/pkg/R/mllib.R                               | 22 ++++++--
 R/pkg/inst/tests/test_mllib.R                 | 31 +++++++++---
 .../apache/spark/ml/r/SparkRWrappers.scala    | 50 +++++++++++++++++--
 3 files changed, 88 insertions(+), 15 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index b0d73dd93a79..7ff859741b4a 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -91,12 +91,26 @@ setMethod("predict", signature(object = "PipelineModel"),
 #'}
 setMethod("summary", signature(x = "PipelineModel"),
           function(x, ...) {
+            modelName <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
+                                   "getModelName", x@model)
             features <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
                                    "getModelFeatures", x@model)
             coefficients <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
                                    "getModelCoefficients", x@model)
-            coefficients <- as.matrix(unlist(coefficients))
-            colnames(coefficients) <- c("Estimate")
-            rownames(coefficients) <- unlist(features)
-            return(list(coefficients = coefficients))
+            if (modelName == "LinearRegressionModel") {
+              devianceResiduals <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
+                                               "getModelDevianceResiduals", x@model)
+              devianceResiduals <- matrix(devianceResiduals, nrow = 1)
+              colnames(devianceResiduals) <- c("Min", "Max")
+              rownames(devianceResiduals) <- rep("", times = 1)
+              coefficients <- matrix(coefficients, ncol = 4)
+              colnames(coefficients) <- c("Estimate", "Std. Error", "t value", "Pr(>|t|)")
+              rownames(coefficients) <- unlist(features)
+              return(list(DevianceResiduals = devianceResiduals, Coefficients = coefficients))
+            } else {
+              coefficients <- as.matrix(unlist(coefficients))
+              colnames(coefficients) <- c("Estimate")
+              rownames(coefficients) <- unlist(features)
+              return(list(coefficients = coefficients))
+            }
           })
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 4761e285a247..2606407bdcb4 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -71,12 +71,23 @@ test_that("feature interaction vs native glm", {
 
 test_that("summary coefficients match with native glm", {
   training <- createDataFrame(sqlContext, iris)
-  stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training, solver = "l-bfgs"))
-  coefs <- as.vector(stats$coefficients)
+  stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training, solver = "normal"))
+  coefs <- unlist(stats$Coefficients)
+  devianceResiduals <- unlist(stats$DevianceResiduals)
+
   rCoefs <- as.vector(coef(glm(Sepal.Width ~ Sepal.Length + Species, data = iris)))
-  expect_true(all(abs(rCoefs - coefs) < 1e-6))
+  rStdError <- c(0.23536, 0.04630, 0.07207, 0.09331)
+  rTValue <- c(7.123, 7.557, -13.644, -10.798)
+  rPValue <- c(0.0, 0.0, 0.0, 0.0)
+  rDevianceResiduals <- c(-0.95096, 0.72918)
+
+  expect_true(all(abs(rCoefs - coefs[1:4]) < 1e-6))
+  expect_true(all(abs(rStdError - coefs[5:8]) < 1e-5))
+  expect_true(all(abs(rTValue - coefs[9:12]) < 1e-3))
+  expect_true(all(abs(rPValue - coefs[13:16]) < 1e-6))
+  expect_true(all(abs(rDevianceResiduals - devianceResiduals) < 1e-5))
   expect_true(all(
-    as.character(stats$features) ==
+    rownames(stats$Coefficients) ==
     c("(Intercept)", "Sepal_Length", "Species_versicolor", "Species_virginica")))
 })
 
@@ -85,14 +96,20 @@ test_that("summary coefficients match with native glm of family 'binomial'", {
   training <- filter(df, df$Species != "setosa")
   stats <- summary(glm(Species ~ Sepal_Length + Sepal_Width, data = training,
     family = "binomial"))
-  coefs <- as.vector(stats$coefficients)
+  coefs <- as.vector(stats$Coefficients)
 
   rTraining <- iris[iris$Species %in% c("versicolor","virginica"),]
   rCoefs <- as.vector(coef(glm(Species ~ Sepal.Length + Sepal.Width, data = rTraining,
     family = binomial(link = "logit"))))
+  rStdError <- c(3.0974, 0.5169, 0.8628)
+  rTValue <- c(-4.212, 3.680, 0.469)
+  rPValue <- c(0.000, 0.000, 0.639)
 
-  expect_true(all(abs(rCoefs - coefs) < 1e-4))
+  expect_true(all(abs(rCoefs - coefs[1:3]) < 1e-4))
+  expect_true(all(abs(rStdError - coefs[4:6]) < 1e-4))
+  expect_true(all(abs(rTValue - coefs[7:9]) < 1e-3))
+  expect_true(all(abs(rPValue - coefs[10:12]) < 1e-3))
   expect_true(all(
-    as.character(stats$features) ==
+    rownames(stats$Coefficients) ==
     c("(Intercept)", "Sepal_Length", "Sepal_Width")))
 })
diff --git a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
index 5be2f8693621..4d82b90bfdf2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/r/SparkRWrappers.scala
@@ -52,11 +52,36 @@ private[r] object SparkRWrappers {
   }
 
   def getModelCoefficients(model: PipelineModel): Array[Double] = {
+    model.stages.last match {
+      case m: LinearRegressionModel => {
+        val coefficientStandardErrorsR = Array(m.summary.coefficientStandardErrors.last) ++
+          m.summary.coefficientStandardErrors.dropRight(1)
+        val tValuesR = Array(m.summary.tValues.last) ++ m.summary.tValues.dropRight(1)
+        val pValuesR = Array(m.summary.pValues.last) ++ m.summary.pValues.dropRight(1)
+        if (m.getFitIntercept) {
+          Array(m.intercept) ++ m.coefficients.toArray ++ coefficientStandardErrorsR ++
+            tValuesR ++ pValuesR
+        } else {
+          m.coefficients.toArray ++ coefficientStandardErrorsR ++ tValuesR ++ pValuesR
+        }
+      }
+      case m: LogisticRegressionModel => {
+        if (m.getFitIntercept) {
+          Array(m.intercept) ++ m.coefficients.toArray
+        } else {
+          m.coefficients.toArray
+        }
+      }
+    }
+  }
+
+  def getModelDevianceResiduals(model: PipelineModel): Array[Double] = {
     model.stages.last match {
       case m: LinearRegressionModel =>
-        Array(m.intercept) ++ m.coefficients.toArray
+        m.summary.devianceResiduals
       case m: LogisticRegressionModel =>
-        Array(m.intercept) ++ m.coefficients.toArray
+        throw new UnsupportedOperationException(
+          "No deviance residuals available for LogisticRegressionModel")
     }
   }
 
@@ -65,11 +90,28 @@ private[r] object SparkRWrappers {
       case m: LinearRegressionModel =>
         val attrs = AttributeGroup.fromStructField(
           m.summary.predictions.schema(m.summary.featuresCol))
-        Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
+        if (m.getFitIntercept) {
+          Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
+        } else {
+          attrs.attributes.get.map(_.name.get)
+        }
       case m: LogisticRegressionModel =>
         val attrs = AttributeGroup.fromStructField(
           m.summary.predictions.schema(m.summary.featuresCol))
-        Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
+        if (m.getFitIntercept) {
+          Array("(Intercept)") ++ attrs.attributes.get.map(_.name.get)
+        } else {
+          attrs.attributes.get.map(_.name.get)
+        }
+    }
+  }
+
+  def getModelName(model: PipelineModel): String = {
+    model.stages.last match {
+      case m: LinearRegressionModel =>
+        "LinearRegressionModel"
+      case m: LogisticRegressionModel =>
+        "LogisticRegressionModel"
     }
   }
 }

From d50a66cc04bfa1c483f04daffe465322316c745e Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Mon, 9 Nov 2015 08:57:29 -0800
Subject: [PATCH 562/896] [SPARK-10689][ML][DOC] User guide and example code
 for AFTSurvivalRegression

Add user guide and example code for ```AFTSurvivalRegression```.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9491 from yanboliang/spark-10689.
---
 docs/ml-guide.md                              |  1 +
 docs/ml-survival-regression.md                | 96 +++++++++++++++++++
 .../ml/JavaAFTSurvivalRegressionExample.java  | 71 ++++++++++++++
 .../main/python/ml/aft_survival_regression.py | 51 ++++++++++
 .../ml/AFTSurvivalRegressionExample.scala     | 62 ++++++++++++
 5 files changed, 281 insertions(+)
 create mode 100644 docs/ml-survival-regression.md
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaAFTSurvivalRegressionExample.java
 create mode 100644 examples/src/main/python/ml/aft_survival_regression.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala

diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index fd3a6167bc65..c293e71d2870 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -44,6 +44,7 @@ provide class probabilities, and linear models provide model summaries.
 * [Ensembles](ml-ensembles.html)
 * [Linear methods with elastic net regularization](ml-linear-methods.html)
 * [Multilayer perceptron classifier](ml-ann.html)
+* [Survival Regression](ml-survival-regression.html)
 
 
 # Main concepts in Pipelines
diff --git a/docs/ml-survival-regression.md b/docs/ml-survival-regression.md
new file mode 100644
index 000000000000..ab275213b9a8
--- /dev/null
+++ b/docs/ml-survival-regression.md
@@ -0,0 +1,96 @@
+---
+layout: global
+title: Survival Regression - ML
+displayTitle: <a href="ml-guide.html">ML</a> - Survival Regression
+---
+
+
+`\[
+\newcommand{\R}{\mathbb{R}}
+\newcommand{\E}{\mathbb{E}}
+\newcommand{\x}{\mathbf{x}}
+\newcommand{\y}{\mathbf{y}}
+\newcommand{\wv}{\mathbf{w}}
+\newcommand{\av}{\mathbf{\alpha}}
+\newcommand{\bv}{\mathbf{b}}
+\newcommand{\N}{\mathbb{N}}
+\newcommand{\id}{\mathbf{I}}
+\newcommand{\ind}{\mathbf{1}}
+\newcommand{\0}{\mathbf{0}}
+\newcommand{\unit}{\mathbf{e}}
+\newcommand{\one}{\mathbf{1}}
+\newcommand{\zero}{\mathbf{0}}
+\]`
+
+
+In `spark.ml`, we implement the [Accelerated failure time (AFT)](https://en.wikipedia.org/wiki/Accelerated_failure_time_model) 
+model which is a parametric survival regression model for censored data. 
+It describes a model for the log of survival time, so it's often called 
+log-linear model for survival analysis. Different from 
+[Proportional hazards](https://en.wikipedia.org/wiki/Proportional_hazards_model) model
+designed for the same purpose, the AFT model is more easily to parallelize 
+because each instance contribute to the objective function independently.
+
+Given the values of the covariates $x^{'}$, for random lifetime $t_{i}$ of 
+subjects i = 1, ..., n, with possible right-censoring, 
+the likelihood function under the AFT model is given as:
+`\[
+L(\beta,\sigma)=\prod_{i=1}^n[\frac{1}{\sigma}f_{0}(\frac{\log{t_{i}}-x^{'}\beta}{\sigma})]^{\delta_{i}}S_{0}(\frac{\log{t_{i}}-x^{'}\beta}{\sigma})^{1-\delta_{i}}
+\]`
+Where $\delta_{i}$ is the indicator of the event has occurred i.e. uncensored or not.
+Using $\epsilon_{i}=\frac{\log{t_{i}}-x^{'}\beta}{\sigma}$, the log-likelihood function
+assumes the form:
+`\[
+\iota(\beta,\sigma)=\sum_{i=1}^{n}[-\delta_{i}\log\sigma+\delta_{i}\log{f_{0}}(\epsilon_{i})+(1-\delta_{i})\log{S_{0}(\epsilon_{i})}]
+\]`
+Where $S_{0}(\epsilon_{i})$ is the baseline survivor function,
+and $f_{0}(\epsilon_{i})$ is corresponding density function.
+
+The most commonly used AFT model is based on the Weibull distribution of the survival time. 
+The Weibull distribution for lifetime corresponding to extreme value distribution for 
+log of the lifetime, and the $S_{0}(\epsilon)$ function is:
+`\[   
+S_{0}(\epsilon_{i})=\exp(-e^{\epsilon_{i}})
+\]`
+the $f_{0}(\epsilon_{i})$ function is:
+`\[
+f_{0}(\epsilon_{i})=e^{\epsilon_{i}}\exp(-e^{\epsilon_{i}})
+\]`
+The log-likelihood function for AFT model with Weibull distribution of lifetime is:
+`\[
+\iota(\beta,\sigma)= -\sum_{i=1}^n[\delta_{i}\log\sigma-\delta_{i}\epsilon_{i}+e^{\epsilon_{i}}]
+\]`
+Due to minimizing the negative log-likelihood equivalent to maximum a posteriori probability,
+the loss function we use to optimize is $-\iota(\beta,\sigma)$.
+The gradient functions for $\beta$ and $\log\sigma$ respectively are:
+`\[   
+\frac{\partial (-\iota)}{\partial \beta}=\sum_{1=1}^{n}[\delta_{i}-e^{\epsilon_{i}}]\frac{x_{i}}{\sigma}
+\]`
+`\[ 
+\frac{\partial (-\iota)}{\partial (\log\sigma)}=\sum_{i=1}^{n}[\delta_{i}+(\delta_{i}-e^{\epsilon_{i}})\epsilon_{i}]
+\]`
+
+The AFT model can be formulated as a convex optimization problem, 
+i.e. the task of finding a minimizer of a convex function $-\iota(\beta,\sigma)$ 
+that depends coefficients vector $\beta$ and the log of scale parameter $\log\sigma$.
+The optimization algorithm underlying the implementation is L-BFGS.
+The implementation matches the result from R's survival function 
+[survreg](https://stat.ethz.ch/R-manual/R-devel/library/survival/html/survreg.html)
+
+## Example:
+
+<div class="codetabs">
+
+<div data-lang="scala" markdown="1">
+{% include_example scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala %}
+</div>
+
+<div data-lang="java" markdown="1">
+{% include_example java/org/apache/spark/examples/ml/JavaAFTSurvivalRegressionExample.java %}
+</div>
+
+<div data-lang="python" markdown="1">
+{% include_example python/ml/aft_survival_regression.py %}
+</div>
+
+</div>
\ No newline at end of file
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaAFTSurvivalRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaAFTSurvivalRegressionExample.java
new file mode 100644
index 000000000000..69a174562fcf
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaAFTSurvivalRegressionExample.java
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+// $example on$
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.regression.AFTSurvivalRegression;
+import org.apache.spark.ml.regression.AFTSurvivalRegressionModel;
+import org.apache.spark.mllib.linalg.*;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.RowFactory;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.types.*;
+// $example off$
+
+public class JavaAFTSurvivalRegressionExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaAFTSurvivalRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext jsql = new SQLContext(jsc);
+
+    // $example on$
+    List<Row> data = Arrays.asList(
+      RowFactory.create(1.218, 1.0, Vectors.dense(1.560, -0.605)),
+      RowFactory.create(2.949, 0.0, Vectors.dense(0.346, 2.158)),
+      RowFactory.create(3.627, 0.0, Vectors.dense(1.380, 0.231)),
+      RowFactory.create(0.273, 1.0, Vectors.dense(0.520, 1.151)),
+      RowFactory.create(4.199, 0.0, Vectors.dense(0.795, -0.226))
+    );
+    StructType schema = new StructType(new StructField[]{
+      new StructField("label", DataTypes.DoubleType, false, Metadata.empty()),
+      new StructField("censor", DataTypes.DoubleType, false, Metadata.empty()),
+      new StructField("features", new VectorUDT(), false, Metadata.empty())
+    });
+    DataFrame training = jsql.createDataFrame(data, schema);
+    double[] quantileProbabilities = new double[]{0.3, 0.6};
+    AFTSurvivalRegression aft = new AFTSurvivalRegression()
+      .setQuantileProbabilities(quantileProbabilities)
+      .setQuantilesCol("quantiles");
+
+    AFTSurvivalRegressionModel model = aft.fit(training);
+
+    // Print the coefficients, intercept and scale parameter for AFT survival regression
+    System.out.println("Coefficients: " + model.coefficients() + " Intercept: "
+      + model.intercept() + " Scale: " + model.scale());
+    model.transform(training).show(false);
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/python/ml/aft_survival_regression.py b/examples/src/main/python/ml/aft_survival_regression.py
new file mode 100644
index 000000000000..0ee01fd8258d
--- /dev/null
+++ b/examples/src/main/python/ml/aft_survival_regression.py
@@ -0,0 +1,51 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+from pyspark.sql import SQLContext
+# $example on$
+from pyspark.ml.regression import AFTSurvivalRegression
+from pyspark.mllib.linalg import Vectors
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="AFTSurvivalRegressionExample")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    training = sqlContext.createDataFrame([
+        (1.218, 1.0, Vectors.dense(1.560, -0.605)),
+        (2.949, 0.0, Vectors.dense(0.346, 2.158)),
+        (3.627, 0.0, Vectors.dense(1.380, 0.231)),
+        (0.273, 1.0, Vectors.dense(0.520, 1.151)),
+        (4.199, 0.0, Vectors.dense(0.795, -0.226))], ["label", "censor", "features"])
+    quantileProbabilities = [0.3, 0.6]
+    aft = AFTSurvivalRegression(quantileProbabilities=quantileProbabilities,
+                                quantilesCol="quantiles")
+
+    model = aft.fit(training)
+
+    # Print the coefficients, intercept and scale parameter for AFT survival regression
+    print("Coefficients: " + str(model.coefficients))
+    print("Intercept: " + str(model.intercept))
+    print("Scale: " + str(model.scale))
+    model.transform(training).show(truncate=False)
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala
new file mode 100644
index 000000000000..5da285e83681
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala
@@ -0,0 +1,62 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.ml.regression.AFTSurvivalRegression
+import org.apache.spark.mllib.linalg.Vectors
+// $example off$
+
+/**
+ * An example for AFTSurvivalRegression.
+ */
+object AFTSurvivalRegressionExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("AFTSurvivalRegressionExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    val training = sqlContext.createDataFrame(Seq(
+      (1.218, 1.0, Vectors.dense(1.560, -0.605)),
+      (2.949, 0.0, Vectors.dense(0.346, 2.158)),
+      (3.627, 0.0, Vectors.dense(1.380, 0.231)),
+      (0.273, 1.0, Vectors.dense(0.520, 1.151)),
+      (4.199, 0.0, Vectors.dense(0.795, -0.226))
+    )).toDF("label", "censor", "features")
+    val quantileProbabilities = Array(0.3, 0.6)
+    val aft = new AFTSurvivalRegression()
+      .setQuantileProbabilities(quantileProbabilities)
+      .setQuantilesCol("quantiles")
+
+    val model = aft.fit(training)
+
+    // Print the coefficients, intercept and scale parameter for AFT survival regression
+    println(s"Coefficients: ${model.coefficients} Intercept: " +
+      s"${model.intercept} Scale: ${model.scale}")
+    model.transform(training).show(false)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:off println

From 9b88e1dcad6b5b14a22cf64a1055ad9870507b5a Mon Sep 17 00:00:00 2001
From: fazlan-nazeem <fazlann@wso2.com>
Date: Mon, 9 Nov 2015 08:58:55 -0800
Subject: [PATCH 563/896] [SPARK-11582][MLLIB] specifying pmml version
 attribute =4.2 in the root node of pmml model

The current pmml models generated do not specify the pmml version in its root node. This is a problem when using this pmml model in other tools because they expect the version attribute to be set explicitly. This fix adds the pmml version attribute to the generated pmml models and specifies its value as 4.2.

Author: fazlan-nazeem <fazlann@wso2.com>

Closes #9558 from fazlan-nazeem/master.
---
 .../org/apache/spark/mllib/pmml/export/PMMLModelExport.scala     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/pmml/export/PMMLModelExport.scala b/mllib/src/main/scala/org/apache/spark/mllib/pmml/export/PMMLModelExport.scala
index c5fdecd3ca17..9267e6dbdb85 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/pmml/export/PMMLModelExport.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/pmml/export/PMMLModelExport.scala
@@ -32,6 +32,7 @@ private[mllib] trait PMMLModelExport {
   @BeanProperty
   val pmml: PMML = new PMML
 
+  pmml.setVersion("4.2")
   setHeader(pmml)
 
   private def setHeader(pmml: PMML): Unit = {

From 08a7a836c393d6a62b9b216eeb01fad0b90b6c52 Mon Sep 17 00:00:00 2001
From: Charles Yeh <charlesyeh@dropbox.com>
Date: Mon, 9 Nov 2015 11:59:32 -0600
Subject: [PATCH 564/896] [SPARK-10565][CORE] add missing web UI stats to
 /api/v1/applications JSON

I looked at the other endpoints, and they don't seem to be missing any fields.
Added fields:
![image](https://cloud.githubusercontent.com/assets/613879/10948801/58159982-82e4-11e5-86dc-62da201af910.png)

Author: Charles Yeh <charlesyeh@dropbox.com>

Closes #9472 from CharlesYeh/api_vars.
---
 .../spark/deploy/master/ui/MasterWebUI.scala  |  7 +-
 .../api/v1/ApplicationListResource.scala      |  8 ++
 .../org/apache/spark/status/api/v1/api.scala  |  4 +
 .../scala/org/apache/spark/ui/SparkUI.scala   |  4 +
 .../deploy/master/ui/MasterWebUISuite.scala   | 90 +++++++++++++++++++
 project/MimaExcludes.scala                    |  3 +
 6 files changed, 114 insertions(+), 2 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/deploy/master/ui/MasterWebUISuite.scala

diff --git a/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterWebUI.scala b/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterWebUI.scala
index 6174fc11f83d..e41554a5a6d2 100644
--- a/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterWebUI.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/master/ui/MasterWebUI.scala
@@ -28,14 +28,17 @@ import org.apache.spark.ui.JettyUtils._
  * Web UI server for the standalone master.
  */
 private[master]
-class MasterWebUI(val master: Master, requestedPort: Int)
+class MasterWebUI(
+    val master: Master,
+    requestedPort: Int,
+    customMasterPage: Option[MasterPage] = None)
   extends WebUI(master.securityMgr, requestedPort, master.conf, name = "MasterUI") with Logging
   with UIRoot {
 
   val masterEndpointRef = master.self
   val killEnabled = master.conf.getBoolean("spark.ui.killEnabled", true)
 
-  val masterPage = new MasterPage(this)
+  val masterPage = customMasterPage.getOrElse(new MasterPage(this))
 
   initialize()
 
diff --git a/core/src/main/scala/org/apache/spark/status/api/v1/ApplicationListResource.scala b/core/src/main/scala/org/apache/spark/status/api/v1/ApplicationListResource.scala
index 17b521f3e1d4..0fc0fb59d861 100644
--- a/core/src/main/scala/org/apache/spark/status/api/v1/ApplicationListResource.scala
+++ b/core/src/main/scala/org/apache/spark/status/api/v1/ApplicationListResource.scala
@@ -62,6 +62,10 @@ private[spark] object ApplicationsListResource {
     new ApplicationInfo(
       id = app.id,
       name = app.name,
+      coresGranted = None,
+      maxCores = None,
+      coresPerExecutor = None,
+      memoryPerExecutorMB = None,
       attempts = app.attempts.map { internalAttemptInfo =>
         new ApplicationAttemptInfo(
           attemptId = internalAttemptInfo.attemptId,
@@ -81,6 +85,10 @@ private[spark] object ApplicationsListResource {
     new ApplicationInfo(
       id = internal.id,
       name = internal.desc.name,
+      coresGranted = Some(internal.coresGranted),
+      maxCores = internal.desc.maxCores,
+      coresPerExecutor = internal.desc.coresPerExecutor,
+      memoryPerExecutorMB = Some(internal.desc.memoryPerExecutorMB),
       attempts = Seq(new ApplicationAttemptInfo(
         attemptId = None,
         startTime = new Date(internal.startTime),
diff --git a/core/src/main/scala/org/apache/spark/status/api/v1/api.scala b/core/src/main/scala/org/apache/spark/status/api/v1/api.scala
index 2bec64f2ef02..baddfc50c1a4 100644
--- a/core/src/main/scala/org/apache/spark/status/api/v1/api.scala
+++ b/core/src/main/scala/org/apache/spark/status/api/v1/api.scala
@@ -25,6 +25,10 @@ import org.apache.spark.JobExecutionStatus
 class ApplicationInfo private[spark](
     val id: String,
     val name: String,
+    val coresGranted: Option[Int],
+    val maxCores: Option[Int],
+    val coresPerExecutor: Option[Int],
+    val memoryPerExecutorMB: Option[Int],
     val attempts: Seq[ApplicationAttemptInfo])
 
 class ApplicationAttemptInfo private[spark](
diff --git a/core/src/main/scala/org/apache/spark/ui/SparkUI.scala b/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
index 99085ada9f0a..4608bce202ec 100644
--- a/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
+++ b/core/src/main/scala/org/apache/spark/ui/SparkUI.scala
@@ -102,6 +102,10 @@ private[spark] class SparkUI private (
     Iterator(new ApplicationInfo(
       id = appId,
       name = appName,
+      coresGranted = None,
+      maxCores = None,
+      coresPerExecutor = None,
+      memoryPerExecutorMB = None,
       attempts = Seq(new ApplicationAttemptInfo(
         attemptId = None,
         startTime = new Date(startTime),
diff --git a/core/src/test/scala/org/apache/spark/deploy/master/ui/MasterWebUISuite.scala b/core/src/test/scala/org/apache/spark/deploy/master/ui/MasterWebUISuite.scala
new file mode 100644
index 000000000000..fba835f054f8
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/deploy/master/ui/MasterWebUISuite.scala
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.deploy.master.ui
+
+import java.util.Date
+
+import scala.io.Source
+import scala.language.postfixOps
+
+import org.json4s.jackson.JsonMethods._
+import org.json4s.JsonAST.{JNothing, JString, JInt}
+import org.mockito.Mockito.{mock, when}
+import org.scalatest.BeforeAndAfter
+
+import org.apache.spark.{SparkConf, SecurityManager, SparkFunSuite}
+import org.apache.spark.deploy.DeployMessages.MasterStateResponse
+import org.apache.spark.deploy.DeployTestUtils._
+import org.apache.spark.deploy.master._
+import org.apache.spark.rpc.RpcEnv
+
+
+class MasterWebUISuite extends SparkFunSuite with BeforeAndAfter {
+
+  val masterPage = mock(classOf[MasterPage])
+  val master = {
+    val conf = new SparkConf
+    val securityMgr = new SecurityManager(conf)
+    val rpcEnv = RpcEnv.create(Master.SYSTEM_NAME, "localhost", 0, conf, securityMgr)
+    val master = new Master(rpcEnv, rpcEnv.address, 0, securityMgr, conf)
+    master
+  }
+  val masterWebUI = new MasterWebUI(master, 0, customMasterPage = Some(masterPage))
+
+  before {
+    masterWebUI.bind()
+  }
+
+  after {
+    masterWebUI.stop()
+  }
+
+  test("list applications") {
+    val worker = createWorkerInfo()
+    val appDesc = createAppDesc()
+    // use new start date so it isn't filtered by UI
+    val activeApp = new ApplicationInfo(
+      new Date().getTime, "id", appDesc, new Date(), null, Int.MaxValue)
+    activeApp.addExecutor(worker, 2)
+
+    val workers = Array[WorkerInfo](worker)
+    val activeApps = Array(activeApp)
+    val completedApps = Array[ApplicationInfo]()
+    val activeDrivers = Array[DriverInfo]()
+    val completedDrivers = Array[DriverInfo]()
+    val stateResponse = new MasterStateResponse(
+      "host", 8080, None, workers, activeApps, completedApps,
+      activeDrivers, completedDrivers, RecoveryState.ALIVE)
+
+    when(masterPage.getMasterState).thenReturn(stateResponse)
+
+    val resultJson = Source.fromURL(
+      s"http://localhost:${masterWebUI.boundPort}/api/v1/applications")
+      .mkString
+    val parsedJson = parse(resultJson)
+    val firstApp = parsedJson(0)
+
+    assert(firstApp \ "id" === JString(activeApp.id))
+    assert(firstApp \ "name" === JString(activeApp.desc.name))
+    assert(firstApp \ "coresGranted" === JInt(2))
+    assert(firstApp \ "maxCores" === JInt(4))
+    assert(firstApp \ "memoryPerExecutorMB" === JInt(1234))
+    assert(firstApp \ "coresPerExecutor" === JNothing)
+  }
+
+}
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index dacef911e397..50220790d1f8 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -134,6 +134,9 @@ object MimaExcludes {
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.toString"),
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.jdbc.PostgresDialect.hashCode"),
         ProblemFilters.exclude[MissingTypesProblem]("org.apache.spark.sql.jdbc.NoopDialect$")
+      ) ++ Seq (
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.status.api.v1.ApplicationInfo.this")
       )
     case v if v.startsWith("1.5") =>
       Seq(

From 404a28f4edd09cf17361dcbd770e4cafde51bf6d Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Mon, 9 Nov 2015 10:07:58 -0800
Subject: [PATCH 565/896] [SPARK-11112] Fix Scala 2.11 compilation error in
 RDDInfo.scala

As shown in https://amplab.cs.berkeley.edu/jenkins/view/Spark-QA-Compile/job/Spark-Master-Scala211-Compile/1946/console , compilation fails with:
```
[error] /home/jenkins/workspace/Spark-Master-Scala211-Compile/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala:25: in class RDDInfo, multiple overloaded alternatives of constructor RDDInfo define default arguments.
[error] class RDDInfo(
[error]
```
This PR tries to fix the compilation error

Author: tedyu <yuzhihong@gmail.com>

Closes #9538 from tedyu/master.
---
 .../scala/org/apache/spark/storage/RDDInfo.scala     | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala b/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
index 3fa209b92417..87c1b981e7e1 100644
--- a/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
+++ b/core/src/main/scala/org/apache/spark/storage/RDDInfo.scala
@@ -28,20 +28,10 @@ class RDDInfo(
     val numPartitions: Int,
     var storageLevel: StorageLevel,
     val parentIds: Seq[Int],
-    val callSite: CallSite,
+    val callSite: CallSite = CallSite.empty,
     val scope: Option[RDDOperationScope] = None)
   extends Ordered[RDDInfo] {
 
-  def this(
-      id: Int,
-      name: String,
-      numPartitions: Int,
-      storageLevel: StorageLevel,
-      parentIds: Seq[Int],
-      scope: Option[RDDOperationScope] = None) {
-    this(id, name, numPartitions, storageLevel, parentIds, CallSite.empty, scope)
-  }
-
   var numCachedPartitions = 0
   var memSize = 0L
   var diskSize = 0L

From cd174882a5a211298d6e173fe989d567d08ebc0d Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Mon, 9 Nov 2015 10:26:09 -0800
Subject: [PATCH 566/896] [SPARK-9865][SPARKR] Flaky SparkR test:
 test_sparkSQL.R: sample on a DataFrame

Make sample test less flaky by setting the seed

Tested with
```
repeat {  if (count(sample(df, FALSE, 0.1)) == 3) { break } }
```

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9549 from felixcheung/rsample.
---
 R/pkg/inst/tests/test_sparkSQL.R | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 92cff1fba719..fbdb9a8f1ef6 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -647,11 +647,11 @@ test_that("sample on a DataFrame", {
   sampled <- sample(df, FALSE, 1.0)
   expect_equal(nrow(collect(sampled)), count(df))
   expect_is(sampled, "DataFrame")
-  sampled2 <- sample(df, FALSE, 0.1)
+  sampled2 <- sample(df, FALSE, 0.1, 0) # set seed for predictable result
   expect_true(count(sampled2) < 3)
 
   # Also test sample_frac
-  sampled3 <- sample_frac(df, FALSE, 0.1)
+  sampled3 <- sample_frac(df, FALSE, 0.1, 0) # set seed for predictable result
   expect_true(count(sampled3) < 3)
 })
 

From 874cd66d4b6d156d0ef112a3d0f3bc5683c6a0ec Mon Sep 17 00:00:00 2001
From: chriskang90 <jckang@uchicago.edu>
Date: Mon, 9 Nov 2015 19:39:22 +0100
Subject: [PATCH 567/896] [DOCS] Fix typo for Python section on unifying Kafka
 streams

1) kafkaStreams is a list.  The list should be unpacked when passing it into the streaming context union method, which accepts a variable number of streams.
2) print() should be pprint() for pyspark.

This contribution is my original work, and I license the work to the project under the project's open source license.

Author: chriskang90 <jckang@uchicago.edu>

Closes #9545 from c-kang/streaming_python_typo.
---
 docs/streaming-programming-guide.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/streaming-programming-guide.md b/docs/streaming-programming-guide.md
index c751dbb41785..e9a27f446a89 100644
--- a/docs/streaming-programming-guide.md
+++ b/docs/streaming-programming-guide.md
@@ -1948,8 +1948,8 @@ unifiedStream.print();
 {% highlight python %}
 numStreams = 5
 kafkaStreams = [KafkaUtils.createStream(...) for _ in range (numStreams)]
-unifiedStream = streamingContext.union(kafkaStreams)
-unifiedStream.print()
+unifiedStream = streamingContext.union(*kafkaStreams)
+unifiedStream.pprint()
 {% endhighlight %}
 </div>
 </div>

From 860ea0d386b5fbbe26bf2954f402a9a73ad37edc Mon Sep 17 00:00:00 2001
From: Bharat Lal <bharat.iisc@gmail.com>
Date: Mon, 9 Nov 2015 11:33:01 -0800
Subject: [PATCH 568/896] [SPARK-11581][DOCS] Example mllib code in
 documentation incorrectly computes MSE

Author: Bharat Lal <bharat.iisc@gmail.com>

Closes #9560 from bharatl/SPARK-11581.
---
 docs/mllib-decision-tree.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/mllib-decision-tree.md b/docs/mllib-decision-tree.md
index f31c4f88936b..b5b454bc6924 100644
--- a/docs/mllib-decision-tree.md
+++ b/docs/mllib-decision-tree.md
@@ -439,7 +439,7 @@ Double testMSE =
     public Double call(Double a, Double b) {
       return a + b;
     }
-  }) / data.count();
+  }) / testData.count();
 System.out.println("Test Mean Squared Error: " + testMSE);
 System.out.println("Learned regression tree model:\n" + model.toDebugString());
 

From 88a3fdcc783f880a8d01c7e194ec42fc114bdf8a Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Mon, 9 Nov 2015 13:16:04 -0800
Subject: [PATCH 569/896] [SPARK-10280][MLLIB][PYSPARK][DOCS] Add @since
 annotation to pyspark.ml.classification

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #8690 from yu-iskw/SPARK-10280.
---
 python/pyspark/ml/classification.py | 56 +++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/python/pyspark/ml/classification.py b/python/pyspark/ml/classification.py
index 2e468f67b898..603f2c7f798d 100644
--- a/python/pyspark/ml/classification.py
+++ b/python/pyspark/ml/classification.py
@@ -67,6 +67,8 @@ class LogisticRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredicti
     Traceback (most recent call last):
         ...
     TypeError: Method setParams forces keyword arguments.
+
+    .. versionadded:: 1.3.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -99,6 +101,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self._checkThresholdConsistency()
 
     @keyword_only
+    @since("1.3.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
                   threshold=0.5, thresholds=None, probabilityCol="probability",
@@ -119,6 +122,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return LogisticRegressionModel(java_model)
 
+    @since("1.4.0")
     def setThreshold(self, value):
         """
         Sets the value of :py:attr:`threshold`.
@@ -129,6 +133,7 @@ def setThreshold(self, value):
             del self._paramMap[self.thresholds]
         return self
 
+    @since("1.4.0")
     def getThreshold(self):
         """
         Gets the value of threshold or its default value.
@@ -144,6 +149,7 @@ def getThreshold(self):
         else:
             return self.getOrDefault(self.threshold)
 
+    @since("1.5.0")
     def setThresholds(self, value):
         """
         Sets the value of :py:attr:`thresholds`.
@@ -154,6 +160,7 @@ def setThresholds(self, value):
             del self._paramMap[self.threshold]
         return self
 
+    @since("1.5.0")
     def getThresholds(self):
         """
         If :py:attr:`thresholds` is set, return its value.
@@ -185,9 +192,12 @@ def _checkThresholdConsistency(self):
 class LogisticRegressionModel(JavaModel):
     """
     Model fitted by LogisticRegression.
+
+    .. versionadded:: 1.3.0
     """
 
     @property
+    @since("1.4.0")
     def weights(self):
         """
         Model weights.
@@ -205,6 +215,7 @@ def coefficients(self):
         return self._call_java("coefficients")
 
     @property
+    @since("1.4.0")
     def intercept(self):
         """
         Model intercept.
@@ -215,6 +226,8 @@ def intercept(self):
 class TreeClassifierParams(object):
     """
     Private class to track supported impurity measures.
+
+    .. versionadded:: 1.4.0
     """
     supportedImpurities = ["entropy", "gini"]
 
@@ -231,6 +244,7 @@ def __init__(self):
                               "gain calculation (case-insensitive). Supported options: " +
                               ", ".join(self.supportedImpurities))
 
+    @since("1.6.0")
     def setImpurity(self, value):
         """
         Sets the value of :py:attr:`impurity`.
@@ -238,6 +252,7 @@ def setImpurity(self, value):
         self._paramMap[self.impurity] = value
         return self
 
+    @since("1.6.0")
     def getImpurity(self):
         """
         Gets the value of impurity or its default value.
@@ -248,6 +263,8 @@ def getImpurity(self):
 class GBTParams(TreeEnsembleParams):
     """
     Private class to track supported GBT params.
+
+    .. versionadded:: 1.4.0
     """
     supportedLossTypes = ["logistic"]
 
@@ -287,6 +304,8 @@ class DecisionTreeClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPred
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     @keyword_only
@@ -310,6 +329,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   probabilityCol="probability", rawPredictionCol="rawPrediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
@@ -333,6 +353,8 @@ def _create_model(self, java_model):
 class DecisionTreeClassificationModel(DecisionTreeModel):
     """
     Model fitted by DecisionTreeClassifier.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -371,6 +393,8 @@ class RandomForestClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPred
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     @keyword_only
@@ -396,6 +420,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   probabilityCol="probability", rawPredictionCol="rawPrediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
@@ -419,6 +444,8 @@ def _create_model(self, java_model):
 class RandomForestClassificationModel(TreeEnsembleModels):
     """
     Model fitted by RandomForestClassifier.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -450,6 +477,8 @@ class GBTClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol
     >>> test1 = sqlContext.createDataFrame([(Vectors.sparse(1, [0], [1.0]),)], ["features"])
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.4.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -482,6 +511,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxDepth=5, maxBins=32, minInstancesPerNode=1, minInfoGain=0.0,
                   maxMemoryInMB=256, cacheNodeIds=False, checkpointInterval=10,
@@ -499,6 +529,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return GBTClassificationModel(java_model)
 
+    @since("1.4.0")
     def setLossType(self, value):
         """
         Sets the value of :py:attr:`lossType`.
@@ -506,6 +537,7 @@ def setLossType(self, value):
         self._paramMap[self.lossType] = value
         return self
 
+    @since("1.4.0")
     def getLossType(self):
         """
         Gets the value of lossType or its default value.
@@ -516,6 +548,8 @@ def getLossType(self):
 class GBTClassificationModel(TreeEnsembleModels):
     """
     Model fitted by GBTClassifier.
+
+    .. versionadded:: 1.4.0
     """
 
 
@@ -555,6 +589,8 @@ class NaiveBayes(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, H
     >>> test1 = sc.parallelize([Row(features=Vectors.sparse(2, [0], [1.0]))]).toDF()
     >>> model.transform(test1).head().prediction
     1.0
+
+    .. versionadded:: 1.5.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -587,6 +623,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.5.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   probabilityCol="probability", rawPredictionCol="rawPrediction", smoothing=1.0,
                   modelType="multinomial"):
@@ -602,6 +639,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return NaiveBayesModel(java_model)
 
+    @since("1.5.0")
     def setSmoothing(self, value):
         """
         Sets the value of :py:attr:`smoothing`.
@@ -609,12 +647,14 @@ def setSmoothing(self, value):
         self._paramMap[self.smoothing] = value
         return self
 
+    @since("1.5.0")
     def getSmoothing(self):
         """
         Gets the value of smoothing or its default value.
         """
         return self.getOrDefault(self.smoothing)
 
+    @since("1.5.0")
     def setModelType(self, value):
         """
         Sets the value of :py:attr:`modelType`.
@@ -622,6 +662,7 @@ def setModelType(self, value):
         self._paramMap[self.modelType] = value
         return self
 
+    @since("1.5.0")
     def getModelType(self):
         """
         Gets the value of modelType or its default value.
@@ -632,9 +673,12 @@ def getModelType(self):
 class NaiveBayesModel(JavaModel):
     """
     Model fitted by NaiveBayes.
+
+    .. versionadded:: 1.5.0
     """
 
     @property
+    @since("1.5.0")
     def pi(self):
         """
         log of class priors.
@@ -642,6 +686,7 @@ def pi(self):
         return self._call_java("pi")
 
     @property
+    @since("1.5.0")
     def theta(self):
         """
         log of class conditional probabilities.
@@ -681,6 +726,8 @@ class MultilayerPerceptronClassifier(JavaEstimator, HasFeaturesCol, HasLabelCol,
     |[0.0,0.0]|       0.0|
     +---------+----------+
     ...
+
+    .. versionadded:: 1.6.0
     """
 
     # a placeholder to make it appear in the generated doc
@@ -715,6 +762,7 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
         self.setParams(**kwargs)
 
     @keyword_only
+    @since("1.6.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, tol=1e-4, seed=None, layers=None, blockSize=128):
         """
@@ -731,6 +779,7 @@ def setParams(self, featuresCol="features", labelCol="label", predictionCol="pre
     def _create_model(self, java_model):
         return MultilayerPerceptronClassificationModel(java_model)
 
+    @since("1.6.0")
     def setLayers(self, value):
         """
         Sets the value of :py:attr:`layers`.
@@ -738,12 +787,14 @@ def setLayers(self, value):
         self._paramMap[self.layers] = value
         return self
 
+    @since("1.6.0")
     def getLayers(self):
         """
         Gets the value of layers or its default value.
         """
         return self.getOrDefault(self.layers)
 
+    @since("1.6.0")
     def setBlockSize(self, value):
         """
         Sets the value of :py:attr:`blockSize`.
@@ -751,6 +802,7 @@ def setBlockSize(self, value):
         self._paramMap[self.blockSize] = value
         return self
 
+    @since("1.6.0")
     def getBlockSize(self):
         """
         Gets the value of blockSize or its default value.
@@ -761,9 +813,12 @@ def getBlockSize(self):
 class MultilayerPerceptronClassificationModel(JavaModel):
     """
     Model fitted by MultilayerPerceptronClassifier.
+
+    .. versionadded:: 1.6.0
     """
 
     @property
+    @since("1.6.0")
     def layers(self):
         """
         array of layer sizes including input and output layers.
@@ -771,6 +826,7 @@ def layers(self):
         return self._call_java("javaLayers")
 
     @property
+    @since("1.6.0")
     def weights(self):
         """
         vector of initial weights for the model that consists of the weights of layers.

From 5039a49b636325f321daa089971107003fae9d4b Mon Sep 17 00:00:00 2001
From: Felix Bechstein <felix.bechstein@otto.de>
Date: Mon, 9 Nov 2015 13:36:14 -0800
Subject: [PATCH 570/896] [SPARK-10471][CORE][MESOS] prevent getting offers for
 unmet constraints

this change rejects offers for slaves with unmet constraints for 120s to mitigate offer starvation.
this prevents mesos to send us these offers again and again.
in return, we get more offers for slaves which might meet our constraints.
and it enables mesos to send the rejected offers to other frameworks.

Author: Felix Bechstein <felix.bechstein@otto.de>

Closes #8639 from felixb/decline_offers_constraint_mismatch.
---
 .../mesos/CoarseMesosSchedulerBackend.scala   | 92 +++++++++++--------
 .../cluster/mesos/MesosSchedulerBackend.scala | 48 +++++++---
 .../cluster/mesos/MesosSchedulerUtils.scala   |  4 +
 3 files changed, 91 insertions(+), 53 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
index d10a77f8e5c7..2de9b6a65169 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
@@ -101,6 +101,10 @@ private[spark] class CoarseMesosSchedulerBackend(
   private val slaveOfferConstraints =
     parseConstraintString(sc.conf.get("spark.mesos.constraints", ""))
 
+  // reject offers with mismatched constraints in seconds
+  private val rejectOfferDurationForUnmetConstraints =
+    getRejectOfferDurationForUnmetConstraints(sc)
+
   // A client for talking to the external shuffle service, if it is a
   private val mesosExternalShuffleClient: Option[MesosExternalShuffleClient] = {
     if (shuffleServiceEnabled) {
@@ -249,48 +253,56 @@ private[spark] class CoarseMesosSchedulerBackend(
         val mem = getResource(offer.getResourcesList, "mem")
         val cpus = getResource(offer.getResourcesList, "cpus").toInt
         val id = offer.getId.getValue
-        if (taskIdToSlaveId.size < executorLimit &&
-            totalCoresAcquired < maxCores &&
-            meetsConstraints &&
-            mem >= calculateTotalMemory(sc) &&
-            cpus >= 1 &&
-            failuresBySlaveId.getOrElse(slaveId, 0) < MAX_SLAVE_FAILURES &&
-            !slaveIdsWithExecutors.contains(slaveId)) {
-          // Launch an executor on the slave
-          val cpusToUse = math.min(cpus, maxCores - totalCoresAcquired)
-          totalCoresAcquired += cpusToUse
-          val taskId = newMesosTaskId()
-          taskIdToSlaveId.put(taskId, slaveId)
-          slaveIdsWithExecutors += slaveId
-          coresByTaskId(taskId) = cpusToUse
-          // Gather cpu resources from the available resources and use them in the task.
-          val (remainingResources, cpuResourcesToUse) =
-            partitionResources(offer.getResourcesList, "cpus", cpusToUse)
-          val (_, memResourcesToUse) =
-            partitionResources(remainingResources.asJava, "mem", calculateTotalMemory(sc))
-          val taskBuilder = MesosTaskInfo.newBuilder()
-            .setTaskId(TaskID.newBuilder().setValue(taskId.toString).build())
-            .setSlaveId(offer.getSlaveId)
-            .setCommand(createCommand(offer, cpusToUse + extraCoresPerSlave, taskId))
-            .setName("Task " + taskId)
-            .addAllResources(cpuResourcesToUse.asJava)
-            .addAllResources(memResourcesToUse.asJava)
-
-          sc.conf.getOption("spark.mesos.executor.docker.image").foreach { image =>
-            MesosSchedulerBackendUtil
-              .setupContainerBuilderDockerInfo(image, sc.conf, taskBuilder.getContainerBuilder())
+        if (meetsConstraints) {
+          if (taskIdToSlaveId.size < executorLimit &&
+              totalCoresAcquired < maxCores &&
+              mem >= calculateTotalMemory(sc) &&
+              cpus >= 1 &&
+              failuresBySlaveId.getOrElse(slaveId, 0) < MAX_SLAVE_FAILURES &&
+              !slaveIdsWithExecutors.contains(slaveId)) {
+            // Launch an executor on the slave
+            val cpusToUse = math.min(cpus, maxCores - totalCoresAcquired)
+            totalCoresAcquired += cpusToUse
+            val taskId = newMesosTaskId()
+            taskIdToSlaveId.put(taskId, slaveId)
+            slaveIdsWithExecutors += slaveId
+            coresByTaskId(taskId) = cpusToUse
+            // Gather cpu resources from the available resources and use them in the task.
+            val (remainingResources, cpuResourcesToUse) =
+              partitionResources(offer.getResourcesList, "cpus", cpusToUse)
+            val (_, memResourcesToUse) =
+              partitionResources(remainingResources.asJava, "mem", calculateTotalMemory(sc))
+            val taskBuilder = MesosTaskInfo.newBuilder()
+              .setTaskId(TaskID.newBuilder().setValue(taskId.toString).build())
+              .setSlaveId(offer.getSlaveId)
+              .setCommand(createCommand(offer, cpusToUse + extraCoresPerSlave, taskId))
+              .setName("Task " + taskId)
+              .addAllResources(cpuResourcesToUse.asJava)
+              .addAllResources(memResourcesToUse.asJava)
+
+            sc.conf.getOption("spark.mesos.executor.docker.image").foreach { image =>
+              MesosSchedulerBackendUtil
+                .setupContainerBuilderDockerInfo(image, sc.conf, taskBuilder.getContainerBuilder())
+            }
+
+            // Accept the offer and launch the task
+            logDebug(s"Accepting offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus")
+            slaveIdToHost(offer.getSlaveId.getValue) = offer.getHostname
+            d.launchTasks(
+              Collections.singleton(offer.getId),
+              Collections.singleton(taskBuilder.build()), filters)
+          } else {
+            // Decline the offer
+            logDebug(s"Declining offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus")
+            d.declineOffer(offer.getId)
           }
-
-          // accept the offer and launch the task
-          logDebug(s"Accepting offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus")
-          slaveIdToHost(offer.getSlaveId.getValue) = offer.getHostname
-          d.launchTasks(
-            Collections.singleton(offer.getId),
-            Collections.singleton(taskBuilder.build()), filters)
         } else {
-          // Decline the offer
-          logDebug(s"Declining offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus")
-          d.declineOffer(offer.getId)
+          // This offer does not meet constraints. We don't need to see it again.
+          // Decline the offer for a long period of time.
+          logDebug(s"Declining offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus"
+              + s" for $rejectOfferDurationForUnmetConstraints seconds")
+          d.declineOffer(offer.getId, Filters.newBuilder()
+            .setRefuseSeconds(rejectOfferDurationForUnmetConstraints).build())
         }
       }
     }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
index aaffac604a88..281965a5981b 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala
@@ -63,6 +63,10 @@ private[spark] class MesosSchedulerBackend(
   private[this] val slaveOfferConstraints =
     parseConstraintString(sc.conf.get("spark.mesos.constraints", ""))
 
+  // reject offers with mismatched constraints in seconds
+  private val rejectOfferDurationForUnmetConstraints =
+    getRejectOfferDurationForUnmetConstraints(sc)
+
   @volatile var appId: String = _
 
   override def start() {
@@ -212,29 +216,47 @@ private[spark] class MesosSchedulerBackend(
    */
   override def resourceOffers(d: SchedulerDriver, offers: JList[Offer]) {
     inClassLoader() {
-      // Fail-fast on offers we know will be rejected
-      val (usableOffers, unUsableOffers) = offers.asScala.partition { o =>
+      // Fail first on offers with unmet constraints
+      val (offersMatchingConstraints, offersNotMatchingConstraints) =
+        offers.asScala.partition { o =>
+          val offerAttributes = toAttributeMap(o.getAttributesList)
+          val meetsConstraints =
+            matchesAttributeRequirements(slaveOfferConstraints, offerAttributes)
+
+          // add some debug messaging
+          if (!meetsConstraints) {
+            val id = o.getId.getValue
+            logDebug(s"Declining offer: $id with attributes: $offerAttributes")
+          }
+
+          meetsConstraints
+        }
+
+      // These offers do not meet constraints. We don't need to see them again.
+      // Decline the offer for a long period of time.
+      offersNotMatchingConstraints.foreach { o =>
+        d.declineOffer(o.getId, Filters.newBuilder()
+          .setRefuseSeconds(rejectOfferDurationForUnmetConstraints).build())
+      }
+
+      // Of the matching constraints, see which ones give us enough memory and cores
+      val (usableOffers, unUsableOffers) = offersMatchingConstraints.partition { o =>
         val mem = getResource(o.getResourcesList, "mem")
         val cpus = getResource(o.getResourcesList, "cpus")
         val slaveId = o.getSlaveId.getValue
         val offerAttributes = toAttributeMap(o.getAttributesList)
 
-        // check if all constraints are satisfield
-        //  1. Attribute constraints
-        //  2. Memory requirements
-        //  3. CPU requirements - need at least 1 for executor, 1 for task
-        val meetsConstraints = matchesAttributeRequirements(slaveOfferConstraints, offerAttributes)
+        // check offers for
+        //  1. Memory requirements
+        //  2. CPU requirements - need at least 1 for executor, 1 for task
         val meetsMemoryRequirements = mem >= calculateTotalMemory(sc)
         val meetsCPURequirements = cpus >= (mesosExecutorCores + scheduler.CPUS_PER_TASK)
-
         val meetsRequirements =
-          (meetsConstraints && meetsMemoryRequirements && meetsCPURequirements) ||
+          (meetsMemoryRequirements && meetsCPURequirements) ||
           (slaveIdToExecutorInfo.contains(slaveId) && cpus >= scheduler.CPUS_PER_TASK)
-
-        // add some debug messaging
         val debugstr = if (meetsRequirements) "Accepting" else "Declining"
-        val id = o.getId.getValue
-        logDebug(s"$debugstr offer: $id with attributes: $offerAttributes mem: $mem cpu: $cpus")
+        logDebug(s"$debugstr offer: ${o.getId.getValue} with attributes: "
+          + s"$offerAttributes mem: $mem cpu: $cpus")
 
         meetsRequirements
       }
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
index 860c8e097b3b..721861fbbc51 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
@@ -336,4 +336,8 @@ private[mesos] trait MesosSchedulerUtils extends Logging {
     }
   }
 
+  protected def getRejectOfferDurationForUnmetConstraints(sc: SparkContext): Long = {
+    sc.conf.getTimeAsSeconds("spark.mesos.rejectOfferDurationForUnmetConstraints", "120s")
+  }
+
 }

From 51d41e4b1a3a25a3fde3a4345afcfe4766023d23 Mon Sep 17 00:00:00 2001
From: sachin aggarwal <different.sachin@gmail.com>
Date: Mon, 9 Nov 2015 14:25:42 -0800
Subject: [PATCH 571/896] [SPARK-11552][DOCS][Replaced example code in
 ml-decision-tree.md using include_example]

I have tested it on my local, it is working fine, please review

Author: sachin aggarwal <different.sachin@gmail.com>

Closes #9539 from agsachin/SPARK-11552-real.
---
 docs/ml-decision-tree.md                      | 338 +-----------------
 ...JavaDecisionTreeClassificationExample.java | 103 ++++++
 .../ml/JavaDecisionTreeRegressionExample.java |  90 +++++
 .../decision_tree_classification_example.py   |  77 ++++
 .../ml/decision_tree_regression_example.py    |  74 ++++
 .../DecisionTreeClassificationExample.scala   |  94 +++++
 .../ml/DecisionTreeRegressionExample.scala    |  81 +++++
 7 files changed, 527 insertions(+), 330 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
 create mode 100644 examples/src/main/python/ml/decision_tree_classification_example.py
 create mode 100644 examples/src/main/python/ml/decision_tree_regression_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala

diff --git a/docs/ml-decision-tree.md b/docs/ml-decision-tree.md
index 542819e93e6d..2bfac6f6c837 100644
--- a/docs/ml-decision-tree.md
+++ b/docs/ml-decision-tree.md
@@ -118,196 +118,24 @@ We use two feature transformers to prepare the data; these help index categories
 
 More details on parameters can be found in the [Scala API documentation](api/scala/index.html#org.apache.spark.ml.classification.DecisionTreeClassifier).
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.classification.DecisionTreeClassifier
-import org.apache.spark.ml.classification.DecisionTreeClassificationModel
-import org.apache.spark.ml.feature.{StringIndexer, IndexToString, VectorIndexer}
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-val labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data)
-// Automatically identify categorical features, and index them.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4) // features with > 4 distinct values are treated as continuous
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a DecisionTree model.
-val dt = new DecisionTreeClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures")
-
-// Convert indexed labels back to original labels.
-val labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels)
-
-// Chain indexers and tree in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(labelIndexer, featureIndexer, dt, labelConverter))
-
-// Train model.  This also runs the indexers.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision")
-val accuracy = evaluator.evaluate(predictions)
-println("Test Error = " + (1.0 - accuracy))
-
-val treeModel = model.stages(2).asInstanceOf[DecisionTreeClassificationModel]
-println("Learned classification tree model:\n" + treeModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala %}
+
 </div>
 
 <div data-lang="java" markdown="1">
 
 More details on parameters can be found in the [Java API documentation](api/java/org/apache/spark/ml/classification/DecisionTreeClassifier.html).
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.classification.DecisionTreeClassifier;
-import org.apache.spark.ml.classification.DecisionTreeClassificationModel;
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
-import org.apache.spark.ml.feature.*;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(sc.sc(), "data/mllib/sample_libsvm_data.txt");
-DataFrame data = jsql.createDataFrame(rdd, LabeledPoint.class);
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-StringIndexerModel labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data);
-// Automatically identify categorical features, and index them.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4) // features with > 4 distinct values are treated as continuous
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a DecisionTree model.
-DecisionTreeClassifier dt = new DecisionTreeClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures");
-
-// Convert indexed labels back to original labels.
-IndexToString labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels());
-
-// Chain indexers and tree in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {labelIndexer, featureIndexer, dt, labelConverter});
-
-// Train model.  This also runs the indexers.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision");
-double accuracy = evaluator.evaluate(predictions);
-System.out.println("Test Error = " + (1.0 - accuracy));
-
-DecisionTreeClassificationModel treeModel =
-  (DecisionTreeClassificationModel)(model.stages()[2]);
-System.out.println("Learned classification tree model:\n" + treeModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java %}
+
 </div>
 
 <div data-lang="python" markdown="1">
 
 More details on parameters can be found in the [Python API documentation](api/python/pyspark.ml.html#pyspark.ml.classification.DecisionTreeClassifier).
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.classification import DecisionTreeClassifier
-from pyspark.ml.feature import StringIndexer, VectorIndexer
-from pyspark.ml.evaluation import MulticlassClassificationEvaluator
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file, converting it to a DataFrame.
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
-
-# Index labels, adding metadata to the label column.
-# Fit on whole dataset to include all labels in index.
-labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
-# Automatically identify categorical features, and index them.
-# We specify maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a DecisionTree model.
-dt = DecisionTreeClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures")
-
-# Chain indexers and tree in a Pipeline
-pipeline = Pipeline(stages=[labelIndexer, featureIndexer, dt])
-
-# Train model.  This also runs the indexers.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "indexedLabel", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = MulticlassClassificationEvaluator(
-    labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
-accuracy = evaluator.evaluate(predictions)
-print "Test Error = %g" % (1.0 - accuracy)
+{% include_example python/ml/decision_tree_classification_example.py %}
 
-treeModel = model.stages[2]
-print treeModel # summary only
-{% endhighlight %}
 </div>
 
 </div>
@@ -323,171 +151,21 @@ We use a feature transformer to index categorical features, adding metadata to t
 
 More details on parameters can be found in the [Scala API documentation](api/scala/index.html#org.apache.spark.ml.regression.DecisionTreeRegressor).
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.regression.DecisionTreeRegressor
-import org.apache.spark.ml.regression.DecisionTreeRegressionModel
-import org.apache.spark.ml.feature.VectorIndexer
-import org.apache.spark.ml.evaluation.RegressionEvaluator
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
-
-// Automatically identify categorical features, and index them.
-// Here, we treat features with > 4 distinct values as continuous.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a DecisionTree model.
-val dt = new DecisionTreeRegressor()
-  .setLabelCol("label")
-  .setFeaturesCol("indexedFeatures")
-
-// Chain indexer and tree in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(featureIndexer, dt))
-
-// Train model.  This also runs the indexer.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse")
-val rmse = evaluator.evaluate(predictions)
-println("Root Mean Squared Error (RMSE) on test data = " + rmse)
-
-val treeModel = model.stages(1).asInstanceOf[DecisionTreeRegressionModel]
-println("Learned regression tree model:\n" + treeModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 More details on parameters can be found in the [Java API documentation](api/java/org/apache/spark/ml/regression/DecisionTreeRegressor.html).
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.evaluation.RegressionEvaluator;
-import org.apache.spark.ml.feature.VectorIndexer;
-import org.apache.spark.ml.feature.VectorIndexerModel;
-import org.apache.spark.ml.regression.DecisionTreeRegressionModel;
-import org.apache.spark.ml.regression.DecisionTreeRegressor;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(sc.sc(), "data/mllib/sample_libsvm_data.txt");
-DataFrame data = jsql.createDataFrame(rdd, LabeledPoint.class);
-
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a DecisionTree model.
-DecisionTreeRegressor dt = new DecisionTreeRegressor()
-  .setFeaturesCol("indexedFeatures");
-
-// Chain indexer and tree in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {featureIndexer, dt});
-
-// Train model.  This also runs the indexer.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-RegressionEvaluator evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse");
-double rmse = evaluator.evaluate(predictions);
-System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
-
-DecisionTreeRegressionModel treeModel =
-  (DecisionTreeRegressionModel)(model.stages()[1]);
-System.out.println("Learned regression tree model:\n" + treeModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 
 More details on parameters can be found in the [Python API documentation](api/python/pyspark.ml.html#pyspark.ml.regression.DecisionTreeRegressor).
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.regression import DecisionTreeRegressor
-from pyspark.ml.feature import VectorIndexer
-from pyspark.ml.evaluation import RegressionEvaluator
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file, converting it to a DataFrame.
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
-
-# Automatically identify categorical features, and index them.
-# We specify maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a DecisionTree model.
-dt = DecisionTreeRegressor(featuresCol="indexedFeatures")
-
-# Chain indexer and tree in a Pipeline
-pipeline = Pipeline(stages=[featureIndexer, dt])
-
-# Train model.  This also runs the indexer.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = RegressionEvaluator(
-    labelCol="label", predictionCol="prediction", metricName="rmse")
-rmse = evaluator.evaluate(predictions)
-print "Root Mean Squared Error (RMSE) on test data = %g" % rmse
-
-treeModel = model.stages[1]
-print treeModel # summary only
-{% endhighlight %}
+{% include_example python/ml/decision_tree_regression_example.py %}
 </div>
 
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
new file mode 100644
index 000000000000..51c1730a8a08
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// scalastyle:off println
+package org.apache.spark.examples.ml;
+// $example on$
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.classification.DecisionTreeClassifier;
+import org.apache.spark.ml.classification.DecisionTreeClassificationModel;
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
+import org.apache.spark.ml.feature.*;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.rdd.RDD;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaDecisionTreeClassificationExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaDecisionTreeClassificationExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt");
+    DataFrame data = sqlContext.createDataFrame(rdd, LabeledPoint.class);
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    StringIndexerModel labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data);
+
+    // Automatically identify categorical features, and index them.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4) // features with > 4 distinct values are treated as continuous
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a DecisionTree model.
+    DecisionTreeClassifier dt = new DecisionTreeClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures");
+
+    // Convert indexed labels back to original labels.
+    IndexToString labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels());
+
+    // Chain indexers and tree in a Pipeline
+    Pipeline pipeline = new Pipeline()
+      .setStages(new PipelineStage[]{labelIndexer, featureIndexer, dt, labelConverter});
+
+    // Train model.  This also runs the indexers.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision");
+    double accuracy = evaluator.evaluate(predictions);
+    System.out.println("Test Error = " + (1.0 - accuracy));
+
+    DecisionTreeClassificationModel treeModel =
+      (DecisionTreeClassificationModel) (model.stages()[2]);
+    System.out.println("Learned classification tree model:\n" + treeModel.toDebugString());
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
new file mode 100644
index 000000000000..a4098a4233ec
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// scalastyle:off println
+package org.apache.spark.examples.ml;
+// $example on$
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.evaluation.RegressionEvaluator;
+import org.apache.spark.ml.feature.VectorIndexer;
+import org.apache.spark.ml.feature.VectorIndexerModel;
+import org.apache.spark.ml.regression.DecisionTreeRegressionModel;
+import org.apache.spark.ml.regression.DecisionTreeRegressor;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.rdd.RDD;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaDecisionTreeRegressionExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaDecisionTreeRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt");
+    DataFrame data = sqlContext.createDataFrame(rdd, LabeledPoint.class);
+
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a DecisionTree model.
+    DecisionTreeRegressor dt = new DecisionTreeRegressor()
+      .setFeaturesCol("indexedFeatures");
+
+    // Chain indexer and tree in a Pipeline
+    Pipeline pipeline = new Pipeline()
+      .setStages(new PipelineStage[]{featureIndexer, dt});
+
+    // Train model.  This also runs the indexer.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    RegressionEvaluator evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse");
+    double rmse = evaluator.evaluate(predictions);
+    System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
+
+    DecisionTreeRegressionModel treeModel =
+      (DecisionTreeRegressionModel) (model.stages()[1]);
+    System.out.println("Learned regression tree model:\n" + treeModel.toDebugString());
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/ml/decision_tree_classification_example.py b/examples/src/main/python/ml/decision_tree_classification_example.py
new file mode 100644
index 000000000000..0af92050e3e3
--- /dev/null
+++ b/examples/src/main/python/ml/decision_tree_classification_example.py
@@ -0,0 +1,77 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Decision Tree Classification Example.
+"""
+from __future__ import print_function
+
+import sys
+
+# $example on$
+from pyspark import SparkContext, SQLContext
+from pyspark.ml import Pipeline
+from pyspark.ml.classification import DecisionTreeClassifier
+from pyspark.ml.feature import StringIndexer, VectorIndexer
+from pyspark.ml.evaluation import MulticlassClassificationEvaluator
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="decision_tree_classification_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+
+    # Index labels, adding metadata to the label column.
+    # Fit on whole dataset to include all labels in index.
+    labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
+    # Automatically identify categorical features, and index them.
+    # We specify maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a DecisionTree model.
+    dt = DecisionTreeClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures")
+
+    # Chain indexers and tree in a Pipeline
+    pipeline = Pipeline(stages=[labelIndexer, featureIndexer, dt])
+
+    # Train model.  This also runs the indexers.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "indexedLabel", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = MulticlassClassificationEvaluator(
+        labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
+    accuracy = evaluator.evaluate(predictions)
+    print("Test Error = %g " % (1.0 - accuracy))
+
+    treeModel = model.stages[2]
+    # summary only
+    print(treeModel)
+    # $example off$
diff --git a/examples/src/main/python/ml/decision_tree_regression_example.py b/examples/src/main/python/ml/decision_tree_regression_example.py
new file mode 100644
index 000000000000..3857aed538da
--- /dev/null
+++ b/examples/src/main/python/ml/decision_tree_regression_example.py
@@ -0,0 +1,74 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Decision Tree Regression Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.ml import Pipeline
+from pyspark.ml.regression import DecisionTreeRegressor
+from pyspark.ml.feature import VectorIndexer
+from pyspark.ml.evaluation import RegressionEvaluator
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="decision_tree_classification_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+
+    # Automatically identify categorical features, and index them.
+    # We specify maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a DecisionTree model.
+    dt = DecisionTreeRegressor(featuresCol="indexedFeatures")
+
+    # Chain indexer and tree in a Pipeline
+    pipeline = Pipeline(stages=[featureIndexer, dt])
+
+    # Train model.  This also runs the indexer.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = RegressionEvaluator(
+        labelCol="label", predictionCol="prediction", metricName="rmse")
+    rmse = evaluator.evaluate(predictions)
+    print("Root Mean Squared Error (RMSE) on test data = %g" % rmse)
+
+    treeModel = model.stages[1]
+    # summary only
+    print(treeModel)
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
new file mode 100644
index 000000000000..a24a344f1bcf
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.classification.DecisionTreeClassifier
+import org.apache.spark.ml.classification.DecisionTreeClassificationModel
+import org.apache.spark.ml.feature.{StringIndexer, IndexToString, VectorIndexer}
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+object DecisionTreeClassificationExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("DecisionTreeClassificationExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+    import sqlContext.implicits._
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    val labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data)
+    // Automatically identify categorical features, and index them.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4) // features with > 4 distinct values are treated as continuous
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a DecisionTree model.
+    val dt = new DecisionTreeClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures")
+
+    // Convert indexed labels back to original labels.
+    val labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels)
+
+    // Chain indexers and tree in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(labelIndexer, featureIndexer, dt, labelConverter))
+
+    // Train model.  This also runs the indexers.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision")
+    val accuracy = evaluator.evaluate(predictions)
+    println("Test Error = " + (1.0 - accuracy))
+
+    val treeModel = model.stages(2).asInstanceOf[DecisionTreeClassificationModel]
+    println("Learned classification tree model:\n" + treeModel.toDebugString)
+    // $example off$
+  }
+}
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
new file mode 100644
index 000000000000..64cd98612900
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.regression.DecisionTreeRegressor
+import org.apache.spark.ml.regression.DecisionTreeRegressionModel
+import org.apache.spark.ml.feature.VectorIndexer
+import org.apache.spark.ml.evaluation.RegressionEvaluator
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+object DecisionTreeRegressionExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("DecisionTreeRegressionExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+    import sqlContext.implicits._
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+
+    // Automatically identify categorical features, and index them.
+    // Here, we treat features with > 4 distinct values as continuous.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a DecisionTree model.
+    val dt = new DecisionTreeRegressor()
+      .setLabelCol("label")
+      .setFeaturesCol("indexedFeatures")
+
+    // Chain indexer and tree in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(featureIndexer, dt))
+
+    // Train model.  This also runs the indexer.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse")
+    val rmse = evaluator.evaluate(predictions)
+    println("Root Mean Squared Error (RMSE) on test data = " + rmse)
+
+    val treeModel = model.stages(1).asInstanceOf[DecisionTreeRegressionModel]
+    println("Learned regression tree model:\n" + treeModel.toDebugString)
+    // $example off$
+  }
+}

From b7720fa45525cff6e812fa448d0841cb41f6c8a5 Mon Sep 17 00:00:00 2001
From: Rishabh Bhardwaj <rbnext29@gmail.com>
Date: Mon, 9 Nov 2015 14:27:36 -0800
Subject: [PATCH 572/896] [SPARK-11548][DOCS] Replaced example code in
 mllib-collaborative-filtering.md using include_example

Kindly review the changes.

Author: Rishabh Bhardwaj <rbnext29@gmail.com>

Closes #9519 from rishabhbhardwaj/SPARK-11337.
---
 docs/mllib-collaborative-filtering.md         | 138 +-----------------
 .../mllib/JavaRecommendationExample.java      |  97 ++++++++++++
 .../python/mllib/recommendation_example.py    |  54 +++++++
 .../mllib/RecommendationExample.scala         |  67 +++++++++
 4 files changed, 221 insertions(+), 135 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaRecommendationExample.java
 create mode 100644 examples/src/main/python/mllib/recommendation_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/RecommendationExample.scala

diff --git a/docs/mllib-collaborative-filtering.md b/docs/mllib-collaborative-filtering.md
index 1ad52123c74a..7cd1b894e7cb 100644
--- a/docs/mllib-collaborative-filtering.md
+++ b/docs/mllib-collaborative-filtering.md
@@ -66,43 +66,7 @@ recommendation model by measuring the Mean Squared Error of rating prediction.
 
 Refer to the [`ALS` Scala docs](api/scala/index.html#org.apache.spark.mllib.recommendation.ALS) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.recommendation.ALS
-import org.apache.spark.mllib.recommendation.MatrixFactorizationModel
-import org.apache.spark.mllib.recommendation.Rating
-
-// Load and parse the data
-val data = sc.textFile("data/mllib/als/test.data")
-val ratings = data.map(_.split(',') match { case Array(user, item, rate) =>
-    Rating(user.toInt, item.toInt, rate.toDouble)
-  })
-
-// Build the recommendation model using ALS
-val rank = 10
-val numIterations = 10
-val model = ALS.train(ratings, rank, numIterations, 0.01)
-
-// Evaluate the model on rating data
-val usersProducts = ratings.map { case Rating(user, product, rate) =>
-  (user, product)
-}
-val predictions = 
-  model.predict(usersProducts).map { case Rating(user, product, rate) => 
-    ((user, product), rate)
-  }
-val ratesAndPreds = ratings.map { case Rating(user, product, rate) => 
-  ((user, product), rate)
-}.join(predictions)
-val MSE = ratesAndPreds.map { case ((user, product), (r1, r2)) => 
-  val err = (r1 - r2)
-  err * err
-}.mean()
-println("Mean Squared Error = " + MSE)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = MatrixFactorizationModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/RecommendationExample.scala %}
 
 If the rating matrix is derived from another source of information (e.g., it is inferred from
 other signals), you can use the `trainImplicit` method to get better results.
@@ -123,81 +87,7 @@ that is equivalent to the provided example in Scala is given below:
 
 Refer to the [`ALS` Java docs](api/java/org/apache/spark/mllib/recommendation/ALS.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.mllib.recommendation.ALS;
-import org.apache.spark.mllib.recommendation.MatrixFactorizationModel;
-import org.apache.spark.mllib.recommendation.Rating;
-import org.apache.spark.SparkConf;
-
-public class CollaborativeFiltering {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Collaborative Filtering Example");
-    JavaSparkContext sc = new JavaSparkContext(conf);
-
-    // Load and parse the data
-    String path = "data/mllib/als/test.data";
-    JavaRDD<String> data = sc.textFile(path);
-    JavaRDD<Rating> ratings = data.map(
-      new Function<String, Rating>() {
-        public Rating call(String s) {
-          String[] sarray = s.split(",");
-          return new Rating(Integer.parseInt(sarray[0]), Integer.parseInt(sarray[1]), 
-                            Double.parseDouble(sarray[2]));
-        }
-      }
-    );
-
-    // Build the recommendation model using ALS
-    int rank = 10;
-    int numIterations = 10;
-    MatrixFactorizationModel model = ALS.train(JavaRDD.toRDD(ratings), rank, numIterations, 0.01); 
-
-    // Evaluate the model on rating data
-    JavaRDD<Tuple2<Object, Object>> userProducts = ratings.map(
-      new Function<Rating, Tuple2<Object, Object>>() {
-        public Tuple2<Object, Object> call(Rating r) {
-          return new Tuple2<Object, Object>(r.user(), r.product());
-        }
-      }
-    );
-    JavaPairRDD<Tuple2<Integer, Integer>, Double> predictions = JavaPairRDD.fromJavaRDD(
-      model.predict(JavaRDD.toRDD(userProducts)).toJavaRDD().map(
-        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Double>>() {
-          public Tuple2<Tuple2<Integer, Integer>, Double> call(Rating r){
-            return new Tuple2<Tuple2<Integer, Integer>, Double>(
-              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
-          }
-        }
-    ));
-    JavaRDD<Tuple2<Double, Double>> ratesAndPreds = 
-      JavaPairRDD.fromJavaRDD(ratings.map(
-        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Double>>() {
-          public Tuple2<Tuple2<Integer, Integer>, Double> call(Rating r){
-            return new Tuple2<Tuple2<Integer, Integer>, Double>(
-              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
-          }
-        }
-    )).join(predictions).values();
-    double MSE = JavaDoubleRDD.fromRDD(ratesAndPreds.map(
-      new Function<Tuple2<Double, Double>, Object>() {
-        public Object call(Tuple2<Double, Double> pair) {
-          Double err = pair._1() - pair._2();
-          return err * err;
-        }
-      }
-    ).rdd()).mean();
-    System.out.println("Mean Squared Error = " + MSE);
-
-    // Save and load model
-    model.save(sc.sc(), "myModelPath");
-    MatrixFactorizationModel sameModel = MatrixFactorizationModel.load(sc.sc(), "myModelPath");
-  }
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaRecommendationExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
@@ -207,29 +97,7 @@ recommendation by measuring the Mean Squared Error of rating prediction.
 
 Refer to the [`ALS` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.recommendation.ALS) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.recommendation import ALS, MatrixFactorizationModel, Rating
-
-# Load and parse the data
-data = sc.textFile("data/mllib/als/test.data")
-ratings = data.map(lambda l: l.split(',')).map(lambda l: Rating(int(l[0]), int(l[1]), float(l[2])))
-
-# Build the recommendation model using Alternating Least Squares
-rank = 10
-numIterations = 10
-model = ALS.train(ratings, rank, numIterations)
-
-# Evaluate the model on training data
-testdata = ratings.map(lambda p: (p[0], p[1]))
-predictions = model.predictAll(testdata).map(lambda r: ((r[0], r[1]), r[2]))
-ratesAndPreds = ratings.map(lambda r: ((r[0], r[1]), r[2])).join(predictions)
-MSE = ratesAndPreds.map(lambda r: (r[1][0] - r[1][1])**2).mean()
-print("Mean Squared Error = " + str(MSE))
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = MatrixFactorizationModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/recommendation_example.py %}
 
 If the rating matrix is derived from other source of information (i.e., it is inferred from other
 signals), you can use the trainImplicit method to get better results.
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaRecommendationExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRecommendationExample.java
new file mode 100644
index 000000000000..1065fde953b9
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRecommendationExample.java
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.recommendation.ALS;
+import org.apache.spark.mllib.recommendation.MatrixFactorizationModel;
+import org.apache.spark.mllib.recommendation.Rating;
+import org.apache.spark.SparkConf;
+// $example off$
+
+public class JavaRecommendationExample {
+  public static void main(String args[]) {
+    // $example on$
+    SparkConf conf = new SparkConf().setAppName("Java Collaborative Filtering Example");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+
+    // Load and parse the data
+    String path = "data/mllib/als/test.data";
+    JavaRDD<String> data = jsc.textFile(path);
+    JavaRDD<Rating> ratings = data.map(
+      new Function<String, Rating>() {
+        public Rating call(String s) {
+          String[] sarray = s.split(",");
+          return new Rating(Integer.parseInt(sarray[0]), Integer.parseInt(sarray[1]),
+            Double.parseDouble(sarray[2]));
+        }
+      }
+    );
+
+    // Build the recommendation model using ALS
+    int rank = 10;
+    int numIterations = 10;
+    MatrixFactorizationModel model = ALS.train(JavaRDD.toRDD(ratings), rank, numIterations, 0.01);
+
+    // Evaluate the model on rating data
+    JavaRDD<Tuple2<Object, Object>> userProducts = ratings.map(
+      new Function<Rating, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(Rating r) {
+          return new Tuple2<Object, Object>(r.user(), r.product());
+        }
+      }
+    );
+    JavaPairRDD<Tuple2<Integer, Integer>, Double> predictions = JavaPairRDD.fromJavaRDD(
+      model.predict(JavaRDD.toRDD(userProducts)).toJavaRDD().map(
+        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Double>>() {
+          public Tuple2<Tuple2<Integer, Integer>, Double> call(Rating r){
+            return new Tuple2<Tuple2<Integer, Integer>, Double>(
+              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
+          }
+        }
+      ));
+    JavaRDD<Tuple2<Double, Double>> ratesAndPreds =
+      JavaPairRDD.fromJavaRDD(ratings.map(
+        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Double>>() {
+          public Tuple2<Tuple2<Integer, Integer>, Double> call(Rating r){
+            return new Tuple2<Tuple2<Integer, Integer>, Double>(
+              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
+          }
+        }
+      )).join(predictions).values();
+    double MSE = JavaDoubleRDD.fromRDD(ratesAndPreds.map(
+      new Function<Tuple2<Double, Double>, Object>() {
+        public Object call(Tuple2<Double, Double> pair) {
+          Double err = pair._1() - pair._2();
+          return err * err;
+        }
+      }
+    ).rdd()).mean();
+    System.out.println("Mean Squared Error = " + MSE);
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myCollaborativeFilter");
+    MatrixFactorizationModel sameModel = MatrixFactorizationModel.load(jsc.sc(),
+      "target/tmp/myCollaborativeFilter");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/recommendation_example.py b/examples/src/main/python/mllib/recommendation_example.py
new file mode 100644
index 000000000000..615db0749b18
--- /dev/null
+++ b/examples/src/main/python/mllib/recommendation_example.py
@@ -0,0 +1,54 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Collaborative Filtering Classification Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+
+# $example on$
+from pyspark.mllib.recommendation import ALS, MatrixFactorizationModel, Rating
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="PythonCollaborativeFilteringExample")
+    # $example on$
+    # Load and parse the data
+    data = sc.textFile("data/mllib/als/test.data")
+    ratings = data.map(lambda l: l.split(','))\
+        .map(lambda l: Rating(int(l[0]), int(l[1]), float(l[2])))
+
+    # Build the recommendation model using Alternating Least Squares
+    rank = 10
+    numIterations = 10
+    model = ALS.train(ratings, rank, numIterations)
+
+    # Evaluate the model on training data
+    testdata = ratings.map(lambda p: (p[0], p[1]))
+    predictions = model.predictAll(testdata).map(lambda r: ((r[0], r[1]), r[2]))
+    ratesAndPreds = ratings.map(lambda r: ((r[0], r[1]), r[2])).join(predictions)
+    MSE = ratesAndPreds.map(lambda r: (r[1][0] - r[1][1])**2).mean()
+    print("Mean Squared Error = " + str(MSE))
+
+    # Save and load model
+    model.save(sc, "target/tmp/myCollaborativeFilter")
+    sameModel = MatrixFactorizationModel.load(sc, "target/tmp/myCollaborativeFilter")
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/RecommendationExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/RecommendationExample.scala
new file mode 100644
index 000000000000..64e460246544
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/RecommendationExample.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.mllib.recommendation.ALS
+import org.apache.spark.mllib.recommendation.MatrixFactorizationModel
+import org.apache.spark.mllib.recommendation.Rating
+// $example off$
+
+object RecommendationExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("CollaborativeFilteringExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load and parse the data
+    val data = sc.textFile("data/mllib/als/test.data")
+    val ratings = data.map(_.split(',') match { case Array(user, item, rate) =>
+      Rating(user.toInt, item.toInt, rate.toDouble)
+    })
+
+    // Build the recommendation model using ALS
+    val rank = 10
+    val numIterations = 10
+    val model = ALS.train(ratings, rank, numIterations, 0.01)
+
+    // Evaluate the model on rating data
+    val usersProducts = ratings.map { case Rating(user, product, rate) =>
+      (user, product)
+    }
+    val predictions =
+      model.predict(usersProducts).map { case Rating(user, product, rate) =>
+        ((user, product), rate)
+      }
+    val ratesAndPreds = ratings.map { case Rating(user, product, rate) =>
+      ((user, product), rate)
+    }.join(predictions)
+    val MSE = ratesAndPreds.map { case ((user, product), (r1, r2)) =>
+      val err = (r1 - r2)
+      err * err
+    }.mean()
+    println("Mean Squared Error = " + MSE)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myCollaborativeFilter")
+    val sameModel = MatrixFactorizationModel.load(sc, "target/tmp/myCollaborativeFilter")
+    // $example off$
+  }
+}
+// scalastyle:on println

From f138cb873335654476d1cd1070900b552dd8b21a Mon Sep 17 00:00:00 2001
From: Nick Buroojy <nick.buroojy@civitaslearning.com>
Date: Mon, 9 Nov 2015 14:30:37 -0800
Subject: [PATCH 573/896] [SPARK-9301][SQL] Add collect_set and collect_list
 aggregate functions

For now they are thin wrappers around the corresponding Hive UDAFs.

One limitation with these in Hive 0.13.0 is they only support aggregating primitive types.

I chose snake_case here instead of camelCase because it seems to be used in the majority of the multi-word fns.

Do we also want to add these to `functions.py`?

This approach was recommended here: https://github.com/apache/spark/pull/8592#issuecomment-154247089

marmbrus rxin

Author: Nick Buroojy <nick.buroojy@civitaslearning.com>

Closes #9526 from nburoojy/nick/udaf-alias.

(cherry picked from commit a6ee4f989d020420dd08b97abb24802200ff23b2)
Signed-off-by: Michael Armbrust <michael@databricks.com>
---
 python/pyspark/sql/functions.py               | 25 +++++++++++--------
 python/pyspark/sql/tests.py                   | 17 +++++++++++++
 .../org/apache/spark/sql/functions.scala      | 20 +++++++++++++++
 .../hive/HiveDataFrameAnalyticsSuite.scala    | 15 +++++++++--
 4 files changed, 64 insertions(+), 13 deletions(-)

diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index 2f7c2f4aacd4..962f676d406d 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -124,17 +124,20 @@ def _():
 
 _functions_1_6 = {
     # unary math functions
-    "stddev": "Aggregate function: returns the unbiased sample standard deviation of" +
-              " the expression in a group.",
-    "stddev_samp": "Aggregate function: returns the unbiased sample standard deviation of" +
-              " the expression in a group.",
-    "stddev_pop": "Aggregate function: returns population standard deviation of" +
-              " the expression in a group.",
-    "variance": "Aggregate function: returns the population variance of the values in a group.",
-    "var_samp": "Aggregate function: returns the unbiased variance of the values in a group.",
-    "var_pop":  "Aggregate function: returns the population variance of the values in a group.",
-    "skewness": "Aggregate function: returns the skewness of the values in a group.",
-    "kurtosis": "Aggregate function: returns the kurtosis of the values in a group."
+    'stddev': 'Aggregate function: returns the unbiased sample standard deviation of' +
+              ' the expression in a group.',
+    'stddev_samp': 'Aggregate function: returns the unbiased sample standard deviation of' +
+                   ' the expression in a group.',
+    'stddev_pop': 'Aggregate function: returns population standard deviation of' +
+                  ' the expression in a group.',
+    'variance': 'Aggregate function: returns the population variance of the values in a group.',
+    'var_samp': 'Aggregate function: returns the unbiased variance of the values in a group.',
+    'var_pop':  'Aggregate function: returns the population variance of the values in a group.',
+    'skewness': 'Aggregate function: returns the skewness of the values in a group.',
+    'kurtosis': 'Aggregate function: returns the kurtosis of the values in a group.',
+    'collect_list': 'Aggregate function: returns a list of objects with duplicates.',
+    'collect_set': 'Aggregate function: returns a set of objects with duplicate elements' +
+                   ' eliminated.'
 }
 
 # math functions that take two arguments as input
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index 4c03a0d4ffe9..e224574bcb30 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -1230,6 +1230,23 @@ def test_window_functions_without_partitionBy(self):
         for r, ex in zip(rs, expected):
             self.assertEqual(tuple(r), ex[:len(r)])
 
+    def test_collect_functions(self):
+        df = self.sqlCtx.createDataFrame([(1, "1"), (2, "2"), (1, "2"), (1, "2")], ["key", "value"])
+        from pyspark.sql import functions
+
+        self.assertEqual(
+            sorted(df.select(functions.collect_set(df.key).alias('r')).collect()[0].r),
+            [1, 2])
+        self.assertEqual(
+            sorted(df.select(functions.collect_list(df.key).alias('r')).collect()[0].r),
+            [1, 1, 1, 2])
+        self.assertEqual(
+            sorted(df.select(functions.collect_set(df.value).alias('r')).collect()[0].r),
+            ["1", "2"])
+        self.assertEqual(
+            sorted(df.select(functions.collect_list(df.value).alias('r')).collect()[0].r),
+            ["1", "2", "2", "2"])
+
 
 if __name__ == "__main__":
     if xmlrunner:
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 04627589886a..3f0b24b68b81 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -174,6 +174,26 @@ object functions {
    */
   def avg(columnName: String): Column = avg(Column(columnName))
 
+  /**
+   * Aggregate function: returns a list of objects with duplicates.
+   *
+   * For now this is an alias for the collect_list Hive UDAF.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def collect_list(e: Column): Column = callUDF("collect_list", e)
+
+  /**
+   * Aggregate function: returns a set of objects with duplicate elements eliminated.
+   *
+   * For now this is an alias for the collect_set Hive UDAF.
+   *
+   * @group agg_funcs
+   * @since 1.6.0
+   */
+  def collect_set(e: Column): Column = callUDF("collect_set", e)
+
   /**
    * Aggregate function: returns the Pearson Correlation Coefficient for two columns.
    *
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
index 2e5cae415e54..9864acf76526 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.hive
 
-import org.apache.spark.sql.{DataFrame, QueryTest}
+import org.apache.spark.sql.{DataFrame, QueryTest, Row}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.scalatest.BeforeAndAfterAll
@@ -32,7 +32,7 @@ class HiveDataFrameAnalyticsSuite extends QueryTest with TestHiveSingleton with
   private var testData: DataFrame = _
 
   override def beforeAll() {
-    testData = Seq((1, 2), (2, 4)).toDF("a", "b")
+    testData = Seq((1, 2), (2, 2), (3, 4)).toDF("a", "b")
     hiveContext.registerDataFrameAsTable(testData, "mytable")
   }
 
@@ -52,6 +52,17 @@ class HiveDataFrameAnalyticsSuite extends QueryTest with TestHiveSingleton with
     )
   }
 
+  test("collect functions") {
+    checkAnswer(
+      testData.select(collect_list($"a"), collect_list($"b")),
+      Seq(Row(Seq(1, 2, 3), Seq(2, 2, 4)))
+    )
+    checkAnswer(
+      testData.select(collect_set($"a"), collect_set($"b")),
+      Seq(Row(Seq(1, 2, 3), Seq(2, 4)))
+    )
+  }
+
   test("cube") {
     checkAnswer(
       testData.cube($"a" + $"b", $"b").agg(sum($"a" - $"b")),

From 150f6a89b79f0e5bc31aa83731429dc7ac5ea76b Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Mon, 9 Nov 2015 14:32:52 -0800
Subject: [PATCH 574/896] [SPARK-11595] [SQL] Fixes ADD JAR when the input path
 contains URL scheme

Author: Cheng Lian <lian@databricks.com>

Closes #9569 from liancheng/spark-11595.fix-add-jar.
---
 .../hive/thriftserver/HiveThriftServer2Suites.scala   |  1 +
 .../apache/spark/sql/hive/client/ClientWrapper.scala  | 11 +++++++++--
 .../spark/sql/hive/client/IsolatedClientLoader.scala  |  9 +++------
 .../spark/sql/hive/execution/HiveQuerySuite.scala     |  8 +++++---
 4 files changed, 18 insertions(+), 11 deletions(-)

diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index ff8ca0150649..5903b9e71cdd 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -41,6 +41,7 @@ import org.apache.thrift.transport.TSocket
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.sql.hive.HiveContext
+import org.apache.spark.sql.hive.test.TestHive
 import org.apache.spark.sql.test.ProcessTestUtils.ProcessOutputCapturer
 import org.apache.spark.util.Utils
 import org.apache.spark.{Logging, SparkFunSuite}
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
index 3dce86c48074..f1c2489b3827 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
@@ -19,7 +19,6 @@ package org.apache.spark.sql.hive.client
 
 import java.io.{File, PrintStream}
 import java.util.{Map => JMap}
-import javax.annotation.concurrent.GuardedBy
 
 import scala.collection.JavaConverters._
 import scala.language.reflectiveCalls
@@ -548,7 +547,15 @@ private[hive] class ClientWrapper(
   }
 
   def addJar(path: String): Unit = {
-    clientLoader.addJar(path)
+    val uri = new Path(path).toUri
+    val jarURL = if (uri.getScheme == null) {
+      // `path` is a local file path without a URL scheme
+      new File(path).toURI.toURL
+    } else {
+      // `path` is a URL with a scheme
+      uri.toURL
+    }
+    clientLoader.addJar(jarURL)
     runSqlHive(s"ADD JAR $path")
   }
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
index f99c3ed2ae98..e041e0d8e5ae 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/IsolatedClientLoader.scala
@@ -22,7 +22,6 @@ import java.lang.reflect.InvocationTargetException
 import java.net.{URL, URLClassLoader}
 import java.util
 
-import scala.collection.mutable
 import scala.language.reflectiveCalls
 import scala.util.Try
 
@@ -30,10 +29,9 @@ import org.apache.commons.io.{FileUtils, IOUtils}
 
 import org.apache.spark.Logging
 import org.apache.spark.deploy.SparkSubmitUtils
-import org.apache.spark.util.{MutableURLClassLoader, Utils}
-
 import org.apache.spark.sql.catalyst.util.quietly
 import org.apache.spark.sql.hive.HiveContext
+import org.apache.spark.util.{MutableURLClassLoader, Utils}
 
 /** Factory for `IsolatedClientLoader` with specific versions of hive. */
 private[hive] object IsolatedClientLoader {
@@ -190,9 +188,8 @@ private[hive] class IsolatedClientLoader(
     new NonClosableMutableURLClassLoader(isolatedClassLoader)
   }
 
-  private[hive] def addJar(path: String): Unit = synchronized {
-    val jarURL = new java.io.File(path).toURI.toURL
-    classLoader.addURL(jarURL)
+  private[hive] def addJar(path: URL): Unit = synchronized {
+    classLoader.addURL(path)
   }
 
   /** The isolated client interface to Hive. */
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index fc72e3c7dc6a..78378c8b69c7 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -927,7 +927,7 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
   test("SPARK-2263: Insert Map<K, V> values") {
     sql("CREATE TABLE m(value MAP<INT, STRING>)")
     sql("INSERT OVERWRITE TABLE m SELECT MAP(key, value) FROM src LIMIT 10")
-    sql("SELECT * FROM m").collect().zip(sql("SELECT * FROM src LIMIT 10").collect()).map {
+    sql("SELECT * FROM m").collect().zip(sql("SELECT * FROM src LIMIT 10").collect()).foreach {
       case (Row(map: Map[_, _]), Row(key: Int, value: String)) =>
         assert(map.size === 1)
         assert(map.head === (key, value))
@@ -961,10 +961,12 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
 
   test("CREATE TEMPORARY FUNCTION") {
     val funcJar = TestHive.getHiveFile("TestUDTF.jar").getCanonicalPath
-    sql(s"ADD JAR $funcJar")
+    val jarURL = s"file://$funcJar"
+    sql(s"ADD JAR $jarURL")
     sql(
       """CREATE TEMPORARY FUNCTION udtf_count2 AS
-        | 'org.apache.spark.sql.hive.execution.GenericUDTFCount2'""".stripMargin)
+        |'org.apache.spark.sql.hive.execution.GenericUDTFCount2'
+      """.stripMargin)
     assert(sql("DESCRIBE FUNCTION udtf_count2").count > 1)
     sql("DROP TEMPORARY FUNCTION udtf_count2")
   }

From a3a7c9103e136035d65a5564f9eb0fa04727c4f3 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Mon, 9 Nov 2015 14:39:18 -0800
Subject: [PATCH 575/896] [SPARK-11359][STREAMING][KINESIS] Checkpoint to
 DynamoDB even when new data doesn't come in

Currently, the checkpoints to DynamoDB occur only when new data comes in, as we update the clock for the checkpointState. This PR makes the checkpoint a scheduled execution based on the `checkpointInterval`.

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9421 from brkyvz/kinesis-checkpoint.
---
 .../kinesis/KinesisCheckpointState.scala      |  54 -------
 .../kinesis/KinesisCheckpointer.scala         | 133 +++++++++++++++
 .../streaming/kinesis/KinesisReceiver.scala   |  38 ++++-
 .../kinesis/KinesisRecordProcessor.scala      |  59 ++-----
 .../kinesis/KinesisCheckpointerSuite.scala    | 152 ++++++++++++++++++
 .../kinesis/KinesisReceiverSuite.scala        |  96 +++--------
 6 files changed, 349 insertions(+), 183 deletions(-)
 delete mode 100644 extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointState.scala
 create mode 100644 extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointer.scala
 create mode 100644 extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointerSuite.scala

diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointState.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointState.scala
deleted file mode 100644
index 83a453755951..000000000000
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointState.scala
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.spark.streaming.kinesis
-
-import org.apache.spark.Logging
-import org.apache.spark.streaming.Duration
-import org.apache.spark.util.{Clock, ManualClock, SystemClock}
-
-/**
- * This is a helper class for managing checkpoint clocks.
- *
- * @param checkpointInterval
- * @param currentClock.  Default to current SystemClock if none is passed in (mocking purposes)
- */
-private[kinesis] class KinesisCheckpointState(
-    checkpointInterval: Duration,
-    currentClock: Clock = new SystemClock())
-  extends Logging {
-
-  /* Initialize the checkpoint clock using the given currentClock + checkpointInterval millis */
-  val checkpointClock = new ManualClock()
-  checkpointClock.setTime(currentClock.getTimeMillis() + checkpointInterval.milliseconds)
-
-  /**
-   * Check if it's time to checkpoint based on the current time and the derived time
-   *   for the next checkpoint
-   *
-   * @return true if it's time to checkpoint
-   */
-  def shouldCheckpoint(): Boolean = {
-    new SystemClock().getTimeMillis() > checkpointClock.getTimeMillis()
-  }
-
-  /**
-   * Advance the checkpoint clock by the checkpoint interval.
-   */
-  def advanceCheckpoint(): Unit = {
-    checkpointClock.advance(checkpointInterval.milliseconds)
-  }
-}
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointer.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointer.scala
new file mode 100644
index 000000000000..1ca6d4302c2b
--- /dev/null
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointer.scala
@@ -0,0 +1,133 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.streaming.kinesis
+
+import java.util.concurrent._
+
+import scala.util.control.NonFatal
+
+import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorCheckpointer
+import com.amazonaws.services.kinesis.clientlibrary.types.ShutdownReason
+
+import org.apache.spark.Logging
+import org.apache.spark.streaming.Duration
+import org.apache.spark.streaming.util.RecurringTimer
+import org.apache.spark.util.{Clock, SystemClock, ThreadUtils}
+
+/**
+ * This is a helper class for managing Kinesis checkpointing.
+ *
+ * @param receiver The receiver that keeps track of which sequence numbers we can checkpoint
+ * @param checkpointInterval How frequently we will checkpoint to DynamoDB
+ * @param workerId Worker Id of KCL worker for logging purposes
+ * @param clock In order to use ManualClocks for the purpose of testing
+ */
+private[kinesis] class KinesisCheckpointer(
+    receiver: KinesisReceiver[_],
+    checkpointInterval: Duration,
+    workerId: String,
+    clock: Clock = new SystemClock) extends Logging {
+
+  // a map from shardId's to checkpointers
+  private val checkpointers = new ConcurrentHashMap[String, IRecordProcessorCheckpointer]()
+
+  private val lastCheckpointedSeqNums = new ConcurrentHashMap[String, String]()
+
+  private val checkpointerThread: RecurringTimer = startCheckpointerThread()
+
+  /** Update the checkpointer instance to the most recent one for the given shardId. */
+  def setCheckpointer(shardId: String, checkpointer: IRecordProcessorCheckpointer): Unit = {
+    checkpointers.put(shardId, checkpointer)
+  }
+
+  /**
+   * Stop tracking the specified shardId.
+   *
+   * If a checkpointer is provided, e.g. on IRecordProcessor.shutdown [[ShutdownReason.TERMINATE]],
+   * we will use that to make the final checkpoint. If `null` is provided, we will not make the
+   * checkpoint, e.g. in case of [[ShutdownReason.ZOMBIE]].
+   */
+  def removeCheckpointer(shardId: String, checkpointer: IRecordProcessorCheckpointer): Unit = {
+    synchronized {
+      checkpointers.remove(shardId)
+      checkpoint(shardId, checkpointer)
+    }
+  }
+
+  /** Perform the checkpoint. */
+  private def checkpoint(shardId: String, checkpointer: IRecordProcessorCheckpointer): Unit = {
+    try {
+      if (checkpointer != null) {
+        receiver.getLatestSeqNumToCheckpoint(shardId).foreach { latestSeqNum =>
+          val lastSeqNum = lastCheckpointedSeqNums.get(shardId)
+          // Kinesis sequence numbers are monotonically increasing strings, therefore we can do
+          // safely do the string comparison
+          if (lastSeqNum == null || latestSeqNum > lastSeqNum) {
+            /* Perform the checkpoint */
+            KinesisRecordProcessor.retryRandom(checkpointer.checkpoint(latestSeqNum), 4, 100)
+            logDebug(s"Checkpoint:  WorkerId $workerId completed checkpoint at sequence number" +
+              s" $latestSeqNum for shardId $shardId")
+            lastCheckpointedSeqNums.put(shardId, latestSeqNum)
+          }
+        }
+      } else {
+        logDebug(s"Checkpointing skipped for shardId $shardId. Checkpointer not set.")
+      }
+    } catch {
+      case NonFatal(e) =>
+        logWarning(s"Failed to checkpoint shardId $shardId to DynamoDB.", e)
+    }
+  }
+
+  /** Checkpoint the latest saved sequence numbers for all active shardId's. */
+  private def checkpointAll(): Unit = synchronized {
+    // if this method throws an exception, then the scheduled task will not run again
+    try {
+      val shardIds = checkpointers.keys()
+      while (shardIds.hasMoreElements) {
+        val shardId = shardIds.nextElement()
+        checkpoint(shardId, checkpointers.get(shardId))
+      }
+    } catch {
+      case NonFatal(e) =>
+        logWarning("Failed to checkpoint to DynamoDB.", e)
+    }
+  }
+
+  /**
+   * Start the checkpointer thread with the given checkpoint duration.
+   */
+  private def startCheckpointerThread(): RecurringTimer = {
+    val period = checkpointInterval.milliseconds
+    val threadName = s"Kinesis Checkpointer - Worker $workerId"
+    val timer = new RecurringTimer(clock, period, _ => checkpointAll(), threadName)
+    timer.start()
+    logDebug(s"Started checkpointer thread: $threadName")
+    timer
+  }
+
+  /**
+   * Shutdown the checkpointer. Should be called on the onStop of the Receiver.
+   */
+  def shutdown(): Unit = {
+    // the recurring timer checkpoints for us one last time.
+    checkpointerThread.stop(interruptTimer = false)
+    checkpointers.clear()
+    lastCheckpointedSeqNums.clear()
+    logInfo("Successfully shutdown Kinesis Checkpointer.")
+  }
+}
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
index 134d627cdaff..50993f157cd9 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
@@ -23,7 +23,7 @@ import scala.collection.mutable
 import scala.util.control.NonFatal
 
 import com.amazonaws.auth.{AWSCredentials, AWSCredentialsProvider, DefaultAWSCredentialsProviderChain}
-import com.amazonaws.services.kinesis.clientlibrary.interfaces.{IRecordProcessor, IRecordProcessorFactory}
+import com.amazonaws.services.kinesis.clientlibrary.interfaces.{IRecordProcessorCheckpointer, IRecordProcessor, IRecordProcessorFactory}
 import com.amazonaws.services.kinesis.clientlibrary.lib.worker.{InitialPositionInStream, KinesisClientLibConfiguration, Worker}
 import com.amazonaws.services.kinesis.model.Record
 
@@ -31,8 +31,7 @@ import org.apache.spark.storage.{StorageLevel, StreamBlockId}
 import org.apache.spark.streaming.Duration
 import org.apache.spark.streaming.receiver.{BlockGenerator, BlockGeneratorListener, Receiver}
 import org.apache.spark.util.Utils
-import org.apache.spark.{Logging, SparkEnv}
-
+import org.apache.spark.Logging
 
 private[kinesis]
 case class SerializableAWSCredentials(accessKeyId: String, secretKey: String)
@@ -127,6 +126,11 @@ private[kinesis] class KinesisReceiver[T](
   private val blockIdToSeqNumRanges = new mutable.HashMap[StreamBlockId, SequenceNumberRanges]
     with mutable.SynchronizedMap[StreamBlockId, SequenceNumberRanges]
 
+  /**
+   * The centralized kinesisCheckpointer that checkpoints based on the given checkpointInterval.
+   */
+  @volatile private var kinesisCheckpointer: KinesisCheckpointer = null
+
   /**
    * Latest sequence number ranges that have been stored successfully.
    * This is used for checkpointing through KCL */
@@ -141,6 +145,7 @@ private[kinesis] class KinesisReceiver[T](
 
     workerId = Utils.localHostName() + ":" + UUID.randomUUID()
 
+    kinesisCheckpointer = new KinesisCheckpointer(receiver, checkpointInterval, workerId)
     // KCL config instance
     val awsCredProvider = resolveAWSCredentialsProvider()
     val kinesisClientLibConfiguration =
@@ -157,8 +162,8 @@ private[kinesis] class KinesisReceiver[T](
     *  We're using our custom KinesisRecordProcessor in this case.
     */
     val recordProcessorFactory = new IRecordProcessorFactory {
-      override def createProcessor: IRecordProcessor = new KinesisRecordProcessor(receiver,
-        workerId, new KinesisCheckpointState(checkpointInterval))
+      override def createProcessor: IRecordProcessor =
+        new KinesisRecordProcessor(receiver, workerId)
     }
 
     worker = new Worker(recordProcessorFactory, kinesisClientLibConfiguration)
@@ -198,6 +203,10 @@ private[kinesis] class KinesisReceiver[T](
       logInfo(s"Stopped receiver for workerId $workerId")
     }
     workerId = null
+    if (kinesisCheckpointer != null) {
+      kinesisCheckpointer.shutdown()
+      kinesisCheckpointer = null
+    }
   }
 
   /** Add records of the given shard to the current block being generated */
@@ -216,6 +225,25 @@ private[kinesis] class KinesisReceiver[T](
     shardIdToLatestStoredSeqNum.get(shardId)
   }
 
+  /**
+   * Set the checkpointer that will be used to checkpoint sequence numbers to DynamoDB for the
+   * given shardId.
+   */
+  def setCheckpointer(shardId: String, checkpointer: IRecordProcessorCheckpointer): Unit = {
+    assert(kinesisCheckpointer != null, "Kinesis Checkpointer not initialized!")
+    kinesisCheckpointer.setCheckpointer(shardId, checkpointer)
+  }
+
+  /**
+   * Remove the checkpointer for the given shardId. The provided checkpointer will be used to
+   * checkpoint one last time for the given shard. If `checkpointer` is `null`, then we will not
+   * checkpoint.
+   */
+  def removeCheckpointer(shardId: String, checkpointer: IRecordProcessorCheckpointer): Unit = {
+    assert(kinesisCheckpointer != null, "Kinesis Checkpointer not initialized!")
+    kinesisCheckpointer.removeCheckpointer(shardId, checkpointer)
+  }
+
   /**
    * Remember the range of sequence numbers that was added to the currently active block.
    * Internally, this is synchronized with `finalizeRangesForCurrentBlock()`.
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
index 1d5178790ec4..e381ffa0cbef 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
@@ -27,26 +27,23 @@ import com.amazonaws.services.kinesis.clientlibrary.types.ShutdownReason
 import com.amazonaws.services.kinesis.model.Record
 
 import org.apache.spark.Logging
+import org.apache.spark.streaming.Duration
 
 /**
  * Kinesis-specific implementation of the Kinesis Client Library (KCL) IRecordProcessor.
  * This implementation operates on the Array[Byte] from the KinesisReceiver.
  * The Kinesis Worker creates an instance of this KinesisRecordProcessor for each
- *   shard in the Kinesis stream upon startup.  This is normally done in separate threads,
- *   but the KCLs within the KinesisReceivers will balance themselves out if you create
- *   multiple Receivers.
+ * shard in the Kinesis stream upon startup.  This is normally done in separate threads,
+ * but the KCLs within the KinesisReceivers will balance themselves out if you create
+ * multiple Receivers.
  *
  * @param receiver Kinesis receiver
  * @param workerId for logging purposes
- * @param checkpointState represents the checkpoint state including the next checkpoint time.
- *   It's injected here for mocking purposes.
  */
-private[kinesis] class KinesisRecordProcessor[T](
-    receiver: KinesisReceiver[T],
-    workerId: String,
-    checkpointState: KinesisCheckpointState) extends IRecordProcessor with Logging {
+private[kinesis] class KinesisRecordProcessor[T](receiver: KinesisReceiver[T], workerId: String)
+  extends IRecordProcessor with Logging {
 
-  // shardId to be populated during initialize()
+  // shardId populated during initialize()
   @volatile
   private var shardId: String = _
 
@@ -74,34 +71,7 @@ private[kinesis] class KinesisRecordProcessor[T](
       try {
         receiver.addRecords(shardId, batch)
         logDebug(s"Stored: Worker $workerId stored ${batch.size} records for shardId $shardId")
-
-        /*
-         *
-         * Checkpoint the sequence number of the last record successfully stored.
-         * Note that in this current implementation, the checkpointing occurs only when after
-         * checkpointIntervalMillis from the last checkpoint, AND when there is new record
-         * to process. This leads to the checkpointing lagging behind what records have been
-         * stored by the receiver. Ofcourse, this can lead records processed more than once,
-         * under failures and restarts.
-         *
-         * TODO: Instead of checkpointing here, run a separate timer task to perform
-         * checkpointing so that it checkpoints in a timely manner independent of whether
-         * new records are available or not.
-         */
-        if (checkpointState.shouldCheckpoint()) {
-          receiver.getLatestSeqNumToCheckpoint(shardId).foreach { latestSeqNum =>
-            /* Perform the checkpoint */
-            KinesisRecordProcessor.retryRandom(checkpointer.checkpoint(latestSeqNum), 4, 100)
-
-            /* Update the next checkpoint time */
-            checkpointState.advanceCheckpoint()
-
-            logDebug(s"Checkpoint:  WorkerId $workerId completed checkpoint of ${batch.size}" +
-              s" records for shardId $shardId")
-            logDebug(s"Checkpoint:  Next checkpoint is at " +
-              s" ${checkpointState.checkpointClock.getTimeMillis()} for shardId $shardId")
-          }
-        }
+        receiver.setCheckpointer(shardId, checkpointer)
       } catch {
         case NonFatal(e) => {
           /*
@@ -142,23 +112,18 @@ private[kinesis] class KinesisRecordProcessor[T](
        * It's now OK to read from the new shards that resulted from a resharding event.
        */
       case ShutdownReason.TERMINATE =>
-        val latestSeqNumToCheckpointOption = receiver.getLatestSeqNumToCheckpoint(shardId)
-        if (latestSeqNumToCheckpointOption.nonEmpty) {
-          KinesisRecordProcessor.retryRandom(
-            checkpointer.checkpoint(latestSeqNumToCheckpointOption.get), 4, 100)
-        }
+        receiver.removeCheckpointer(shardId, checkpointer)
 
       /*
-       * ZOMBIE Use Case.  NoOp.
+       * ZOMBIE Use Case or Unknown reason.  NoOp.
        * No checkpoint because other workers may have taken over and already started processing
        *    the same records.
        * This may lead to records being processed more than once.
        */
-      case ShutdownReason.ZOMBIE =>
-
-      /* Unknown reason.  NoOp */
       case _ =>
+        receiver.removeCheckpointer(shardId, null) // return null so that we don't checkpoint
     }
+
   }
 }
 
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointerSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointerSuite.scala
new file mode 100644
index 000000000000..645e64a0bc3a
--- /dev/null
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisCheckpointerSuite.scala
@@ -0,0 +1,152 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.kinesis
+
+import java.util.concurrent.{TimeoutException, ExecutorService}
+
+import scala.concurrent.{Await, ExecutionContext, Future}
+import scala.concurrent.duration._
+import scala.language.postfixOps
+
+import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorCheckpointer
+import org.mockito.Matchers._
+import org.mockito.Mockito._
+import org.mockito.invocation.InvocationOnMock
+import org.mockito.stubbing.Answer
+import org.scalatest.{PrivateMethodTester, BeforeAndAfterEach}
+import org.scalatest.concurrent.Eventually
+import org.scalatest.concurrent.Eventually._
+import org.scalatest.mock.MockitoSugar
+
+import org.apache.spark.streaming.{Duration, TestSuiteBase}
+import org.apache.spark.util.ManualClock
+
+class KinesisCheckpointerSuite extends TestSuiteBase
+  with MockitoSugar
+  with BeforeAndAfterEach
+  with PrivateMethodTester
+  with Eventually {
+
+  private val workerId = "dummyWorkerId"
+  private val shardId = "dummyShardId"
+  private val seqNum = "123"
+  private val otherSeqNum = "245"
+  private val checkpointInterval = Duration(10)
+  private val someSeqNum = Some(seqNum)
+  private val someOtherSeqNum = Some(otherSeqNum)
+
+  private var receiverMock: KinesisReceiver[Array[Byte]] = _
+  private var checkpointerMock: IRecordProcessorCheckpointer = _
+  private var kinesisCheckpointer: KinesisCheckpointer = _
+  private var clock: ManualClock = _
+
+  private val checkpoint = PrivateMethod[Unit]('checkpoint)
+
+  override def beforeEach(): Unit = {
+    receiverMock = mock[KinesisReceiver[Array[Byte]]]
+    checkpointerMock = mock[IRecordProcessorCheckpointer]
+    clock = new ManualClock()
+    kinesisCheckpointer = new KinesisCheckpointer(receiverMock, checkpointInterval, workerId, clock)
+  }
+
+  test("checkpoint is not called twice for the same sequence number") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
+    kinesisCheckpointer.invokePrivate(checkpoint(shardId, checkpointerMock))
+    kinesisCheckpointer.invokePrivate(checkpoint(shardId, checkpointerMock))
+
+    verify(checkpointerMock, times(1)).checkpoint(anyString())
+  }
+
+  test("checkpoint is called after sequence number increases") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId))
+      .thenReturn(someSeqNum).thenReturn(someOtherSeqNum)
+    kinesisCheckpointer.invokePrivate(checkpoint(shardId, checkpointerMock))
+    kinesisCheckpointer.invokePrivate(checkpoint(shardId, checkpointerMock))
+
+    verify(checkpointerMock, times(1)).checkpoint(seqNum)
+    verify(checkpointerMock, times(1)).checkpoint(otherSeqNum)
+  }
+
+  test("should checkpoint if we have exceeded the checkpoint interval") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId))
+      .thenReturn(someSeqNum).thenReturn(someOtherSeqNum)
+
+    kinesisCheckpointer.setCheckpointer(shardId, checkpointerMock)
+    clock.advance(5 * checkpointInterval.milliseconds)
+
+    eventually(timeout(1 second)) {
+      verify(checkpointerMock, times(1)).checkpoint(seqNum)
+      verify(checkpointerMock, times(1)).checkpoint(otherSeqNum)
+    }
+  }
+
+  test("shouldn't checkpoint if we have not exceeded the checkpoint interval") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
+
+    kinesisCheckpointer.setCheckpointer(shardId, checkpointerMock)
+    clock.advance(checkpointInterval.milliseconds / 2)
+
+    verify(checkpointerMock, never()).checkpoint(anyString())
+  }
+
+  test("should not checkpoint for the same sequence number") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
+
+    kinesisCheckpointer.setCheckpointer(shardId, checkpointerMock)
+
+    clock.advance(checkpointInterval.milliseconds * 5)
+    eventually(timeout(1 second)) {
+      verify(checkpointerMock, atMost(1)).checkpoint(anyString())
+    }
+  }
+
+  test("removing checkpointer checkpoints one last time") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
+
+    kinesisCheckpointer.removeCheckpointer(shardId, checkpointerMock)
+    verify(checkpointerMock, times(1)).checkpoint(anyString())
+  }
+
+  test("if checkpointing is going on, wait until finished before removing and checkpointing") {
+    when(receiverMock.getLatestSeqNumToCheckpoint(shardId))
+      .thenReturn(someSeqNum).thenReturn(someOtherSeqNum)
+    when(checkpointerMock.checkpoint(anyString)).thenAnswer(new Answer[Unit] {
+      override def answer(invocations: InvocationOnMock): Unit = {
+        clock.waitTillTime(clock.getTimeMillis() + checkpointInterval.milliseconds / 2)
+      }
+    })
+
+    kinesisCheckpointer.setCheckpointer(shardId, checkpointerMock)
+    clock.advance(checkpointInterval.milliseconds)
+    eventually(timeout(1 second)) {
+      verify(checkpointerMock, times(1)).checkpoint(anyString())
+    }
+    // don't block test thread
+    val f = Future(kinesisCheckpointer.removeCheckpointer(shardId, checkpointerMock))(
+      ExecutionContext.global)
+
+    intercept[TimeoutException] {
+      Await.ready(f, 50 millis)
+    }
+
+    clock.advance(checkpointInterval.milliseconds / 2)
+    eventually(timeout(1 second)) {
+      verify(checkpointerMock, times(2)).checkpoint(anyString())
+    }
+  }
+}
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
index 17ab444704f4..e5c70db554a2 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisReceiverSuite.scala
@@ -25,12 +25,13 @@ import com.amazonaws.services.kinesis.clientlibrary.interfaces.IRecordProcessorC
 import com.amazonaws.services.kinesis.clientlibrary.types.ShutdownReason
 import com.amazonaws.services.kinesis.model.Record
 import org.mockito.Matchers._
+import org.mockito.Matchers.{eq => meq}
 import org.mockito.Mockito._
 import org.scalatest.mock.MockitoSugar
 import org.scalatest.{BeforeAndAfter, Matchers}
 
-import org.apache.spark.streaming.{Milliseconds, TestSuiteBase}
-import org.apache.spark.util.{Clock, ManualClock, Utils}
+import org.apache.spark.streaming.{Duration, TestSuiteBase}
+import org.apache.spark.util.Utils
 
 /**
  * Suite of Kinesis streaming receiver tests focusing mostly on the KinesisRecordProcessor
@@ -44,6 +45,7 @@ class KinesisReceiverSuite extends TestSuiteBase with Matchers with BeforeAndAft
   val workerId = "dummyWorkerId"
   val shardId = "dummyShardId"
   val seqNum = "dummySeqNum"
+  val checkpointInterval = Duration(10)
   val someSeqNum = Some(seqNum)
 
   val record1 = new Record()
@@ -54,24 +56,10 @@ class KinesisReceiverSuite extends TestSuiteBase with Matchers with BeforeAndAft
 
   var receiverMock: KinesisReceiver[Array[Byte]] = _
   var checkpointerMock: IRecordProcessorCheckpointer = _
-  var checkpointClockMock: ManualClock = _
-  var checkpointStateMock: KinesisCheckpointState = _
-  var currentClockMock: Clock = _
 
   override def beforeFunction(): Unit = {
     receiverMock = mock[KinesisReceiver[Array[Byte]]]
     checkpointerMock = mock[IRecordProcessorCheckpointer]
-    checkpointClockMock = mock[ManualClock]
-    checkpointStateMock = mock[KinesisCheckpointState]
-    currentClockMock = mock[Clock]
-  }
-
-  override def afterFunction(): Unit = {
-    super.afterFunction()
-    // Since this suite was originally written using EasyMock, add this to preserve the old
-    // mocking semantics (see SPARK-5735 for more details)
-    verifyNoMoreInteractions(receiverMock, checkpointerMock, checkpointClockMock,
-      checkpointStateMock, currentClockMock)
   }
 
   test("check serializability of SerializableAWSCredentials") {
@@ -79,113 +67,67 @@ class KinesisReceiverSuite extends TestSuiteBase with Matchers with BeforeAndAft
       Utils.serialize(new SerializableAWSCredentials("x", "y")))
   }
 
-  test("process records including store and checkpoint") {
+  test("process records including store and set checkpointer") {
     when(receiverMock.isStopped()).thenReturn(false)
-    when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
-    when(checkpointStateMock.shouldCheckpoint()).thenReturn(true)
 
-    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId, checkpointStateMock)
+    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId)
     recordProcessor.initialize(shardId)
     recordProcessor.processRecords(batch, checkpointerMock)
 
     verify(receiverMock, times(1)).isStopped()
     verify(receiverMock, times(1)).addRecords(shardId, batch)
-    verify(receiverMock, times(1)).getLatestSeqNumToCheckpoint(shardId)
-    verify(checkpointStateMock, times(1)).shouldCheckpoint()
-    verify(checkpointerMock, times(1)).checkpoint(anyString)
-    verify(checkpointStateMock, times(1)).advanceCheckpoint()
+    verify(receiverMock, times(1)).setCheckpointer(shardId, checkpointerMock)
   }
 
-  test("shouldn't store and checkpoint when receiver is stopped") {
+  test("shouldn't store and update checkpointer when receiver is stopped") {
     when(receiverMock.isStopped()).thenReturn(true)
 
-    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId, checkpointStateMock)
+    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId)
     recordProcessor.processRecords(batch, checkpointerMock)
 
     verify(receiverMock, times(1)).isStopped()
     verify(receiverMock, never).addRecords(anyString, anyListOf(classOf[Record]))
-    verify(checkpointerMock, never).checkpoint(anyString)
+    verify(receiverMock, never).setCheckpointer(anyString, meq(checkpointerMock))
   }
 
-  test("shouldn't checkpoint when exception occurs during store") {
+  test("shouldn't update checkpointer when exception occurs during store") {
     when(receiverMock.isStopped()).thenReturn(false)
     when(
       receiverMock.addRecords(anyString, anyListOf(classOf[Record]))
     ).thenThrow(new RuntimeException())
 
     intercept[RuntimeException] {
-      val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId, checkpointStateMock)
+      val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId)
       recordProcessor.initialize(shardId)
       recordProcessor.processRecords(batch, checkpointerMock)
     }
 
     verify(receiverMock, times(1)).isStopped()
     verify(receiverMock, times(1)).addRecords(shardId, batch)
-    verify(checkpointerMock, never).checkpoint(anyString)
-  }
-
-  test("should set checkpoint time to currentTime + checkpoint interval upon instantiation") {
-    when(currentClockMock.getTimeMillis()).thenReturn(0)
-
-    val checkpointIntervalMillis = 10
-    val checkpointState =
-      new KinesisCheckpointState(Milliseconds(checkpointIntervalMillis), currentClockMock)
-    assert(checkpointState.checkpointClock.getTimeMillis() == checkpointIntervalMillis)
-
-    verify(currentClockMock, times(1)).getTimeMillis()
-  }
-
-  test("should checkpoint if we have exceeded the checkpoint interval") {
-    when(currentClockMock.getTimeMillis()).thenReturn(0)
-
-    val checkpointState = new KinesisCheckpointState(Milliseconds(Long.MinValue), currentClockMock)
-    assert(checkpointState.shouldCheckpoint())
-
-    verify(currentClockMock, times(1)).getTimeMillis()
-  }
-
-  test("shouldn't checkpoint if we have not exceeded the checkpoint interval") {
-    when(currentClockMock.getTimeMillis()).thenReturn(0)
-
-    val checkpointState = new KinesisCheckpointState(Milliseconds(Long.MaxValue), currentClockMock)
-    assert(!checkpointState.shouldCheckpoint())
-
-    verify(currentClockMock, times(1)).getTimeMillis()
-  }
-
-  test("should add to time when advancing checkpoint") {
-    when(currentClockMock.getTimeMillis()).thenReturn(0)
-
-    val checkpointIntervalMillis = 10
-    val checkpointState =
-      new KinesisCheckpointState(Milliseconds(checkpointIntervalMillis), currentClockMock)
-    assert(checkpointState.checkpointClock.getTimeMillis() == checkpointIntervalMillis)
-    checkpointState.advanceCheckpoint()
-    assert(checkpointState.checkpointClock.getTimeMillis() == (2 * checkpointIntervalMillis))
-
-    verify(currentClockMock, times(1)).getTimeMillis()
+    verify(receiverMock, never).setCheckpointer(anyString, meq(checkpointerMock))
   }
 
   test("shutdown should checkpoint if the reason is TERMINATE") {
     when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
 
-    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId, checkpointStateMock)
+    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId)
     recordProcessor.initialize(shardId)
     recordProcessor.shutdown(checkpointerMock, ShutdownReason.TERMINATE)
 
-    verify(receiverMock, times(1)).getLatestSeqNumToCheckpoint(shardId)
-    verify(checkpointerMock, times(1)).checkpoint(anyString)
+    verify(receiverMock, times(1)).removeCheckpointer(meq(shardId), meq(checkpointerMock))
   }
 
+
   test("shutdown should not checkpoint if the reason is something other than TERMINATE") {
     when(receiverMock.getLatestSeqNumToCheckpoint(shardId)).thenReturn(someSeqNum)
 
-    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId, checkpointStateMock)
+    val recordProcessor = new KinesisRecordProcessor(receiverMock, workerId)
     recordProcessor.initialize(shardId)
     recordProcessor.shutdown(checkpointerMock, ShutdownReason.ZOMBIE)
     recordProcessor.shutdown(checkpointerMock, null)
 
-    verify(checkpointerMock, never).checkpoint(anyString)
+    verify(receiverMock, times(2)).removeCheckpointer(meq(shardId),
+      meq[IRecordProcessorCheckpointer](null))
   }
 
   test("retry success on first attempt") {

From 8a2336893a7ff610a6c4629dd567b85078730616 Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Mon, 9 Nov 2015 14:56:36 -0800
Subject: [PATCH 576/896] [SPARK-6517][MLLIB] Implement the Algorithm of
 Hierarchical Clustering

I implemented a hierarchical clustering algorithm again.  This PR doesn't include examples, documentation and spark.ml APIs. I am going to send another PRs later.
https://issues.apache.org/jira/browse/SPARK-6517

- This implementation based on a bi-sectiong K-means clustering.
    - It derives from the freeman-lab 's implementation
- The basic idea is not changed from the previous version. (#2906)
    - However, It is 1000x faster than the previous version through parallel processing.

Thank you for your great cooperation, RJ Nowling(rnowling), Jeremy Freeman(freeman-lab), Xiangrui Meng(mengxr) and Sean Owen(srowen).

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Author: Xiangrui Meng <meng@databricks.com>
Author: Yu ISHIKAWA <yu-iskw@users.noreply.github.com>

Closes #5267 from yu-iskw/new-hierarchical-clustering.
---
 .../mllib/clustering/BisectingKMeans.scala    | 491 ++++++++++++++++++
 .../clustering/BisectingKMeansModel.scala     |  95 ++++
 .../clustering/JavaBisectingKMeansSuite.java  |  73 +++
 .../clustering/BisectingKMeansSuite.scala     | 182 +++++++
 4 files changed, 841 insertions(+)
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeans.scala
 create mode 100644 mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeansModel.scala
 create mode 100644 mllib/src/test/java/org/apache/spark/mllib/clustering/JavaBisectingKMeansSuite.java
 create mode 100644 mllib/src/test/scala/org/apache/spark/mllib/clustering/BisectingKMeansSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeans.scala
new file mode 100644
index 000000000000..29a7aa0bb63f
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeans.scala
@@ -0,0 +1,491 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.clustering
+
+import java.util.Random
+
+import scala.collection.mutable
+
+import org.apache.spark.Logging
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.api.java.JavaRDD
+import org.apache.spark.mllib.linalg.{BLAS, Vector, Vectors}
+import org.apache.spark.mllib.util.MLUtils
+import org.apache.spark.rdd.RDD
+import org.apache.spark.storage.StorageLevel
+
+/**
+ * A bisecting k-means algorithm based on the paper "A comparison of document clustering techniques"
+ * by Steinbach, Karypis, and Kumar, with modification to fit Spark.
+ * The algorithm starts from a single cluster that contains all points.
+ * Iteratively it finds divisible clusters on the bottom level and bisects each of them using
+ * k-means, until there are `k` leaf clusters in total or no leaf clusters are divisible.
+ * The bisecting steps of clusters on the same level are grouped together to increase parallelism.
+ * If bisecting all divisible clusters on the bottom level would result more than `k` leaf clusters,
+ * larger clusters get higher priority.
+ *
+ * @param k the desired number of leaf clusters (default: 4). The actual number could be smaller if
+ *          there are no divisible leaf clusters.
+ * @param maxIterations the max number of k-means iterations to split clusters (default: 20)
+ * @param minDivisibleClusterSize the minimum number of points (if >= 1.0) or the minimum proportion
+ *                                of points (if < 1.0) of a divisible cluster (default: 1)
+ * @param seed a random seed (default: hash value of the class name)
+ *
+ * @see [[http://glaros.dtc.umn.edu/gkhome/fetch/papers/docclusterKDDTMW00.pdf
+ *     Steinbach, Karypis, and Kumar, A comparison of document clustering techniques,
+ *     KDD Workshop on Text Mining, 2000.]]
+ */
+@Since("1.6.0")
+@Experimental
+class BisectingKMeans private (
+    private var k: Int,
+    private var maxIterations: Int,
+    private var minDivisibleClusterSize: Double,
+    private var seed: Long) extends Logging {
+
+  import BisectingKMeans._
+
+  /**
+   * Constructs with the default configuration
+   */
+  @Since("1.6.0")
+  def this() = this(4, 20, 1.0, classOf[BisectingKMeans].getName.##)
+
+  /**
+   * Sets the desired number of leaf clusters (default: 4).
+   * The actual number could be smaller if there are no divisible leaf clusters.
+   */
+  @Since("1.6.0")
+  def setK(k: Int): this.type = {
+    require(k > 0, s"k must be positive but got $k.")
+    this.k = k
+    this
+  }
+
+  /**
+   * Gets the desired number of leaf clusters.
+   */
+  @Since("1.6.0")
+  def getK: Int = this.k
+
+  /**
+   * Sets the max number of k-means iterations to split clusters (default: 20).
+   */
+  @Since("1.6.0")
+  def setMaxIterations(maxIterations: Int): this.type = {
+    require(maxIterations > 0, s"maxIterations must be positive but got $maxIterations.")
+    this.maxIterations = maxIterations
+    this
+  }
+
+  /**
+   * Gets the max number of k-means iterations to split clusters.
+   */
+  @Since("1.6.0")
+  def getMaxIterations: Int = this.maxIterations
+
+  /**
+   * Sets the minimum number of points (if >= `1.0`) or the minimum proportion of points
+   * (if < `1.0`) of a divisible cluster (default: 1).
+   */
+  @Since("1.6.0")
+  def setMinDivisibleClusterSize(minDivisibleClusterSize: Double): this.type = {
+    require(minDivisibleClusterSize > 0.0,
+      s"minDivisibleClusterSize must be positive but got $minDivisibleClusterSize.")
+    this.minDivisibleClusterSize = minDivisibleClusterSize
+    this
+  }
+
+  /**
+   * Gets the minimum number of points (if >= `1.0`) or the minimum proportion of points
+   * (if < `1.0`) of a divisible cluster.
+   */
+  @Since("1.6.0")
+  def getMinDivisibleClusterSize: Double = minDivisibleClusterSize
+
+  /**
+   * Sets the random seed (default: hash value of the class name).
+   */
+  @Since("1.6.0")
+  def setSeed(seed: Long): this.type = {
+    this.seed = seed
+    this
+  }
+
+  /**
+   * Gets the random seed.
+   */
+  @Since("1.6.0")
+  def getSeed: Long = this.seed
+
+  /**
+   * Runs the bisecting k-means algorithm.
+   * @param input RDD of vectors
+   * @return model for the bisecting kmeans
+   */
+  @Since("1.6.0")
+  def run(input: RDD[Vector]): BisectingKMeansModel = {
+    if (input.getStorageLevel == StorageLevel.NONE) {
+      logWarning(s"The input RDD ${input.id} is not directly cached, which may hurt performance if"
+        + " its parent RDDs are also not cached.")
+    }
+    val d = input.map(_.size).first()
+    logInfo(s"Feature dimension: $d.")
+    // Compute and cache vector norms for fast distance computation.
+    val norms = input.map(v => Vectors.norm(v, 2.0)).persist(StorageLevel.MEMORY_AND_DISK)
+    val vectors = input.zip(norms).map { case (x, norm) => new VectorWithNorm(x, norm) }
+    var assignments = vectors.map(v => (ROOT_INDEX, v))
+    var activeClusters = summarize(d, assignments)
+    val rootSummary = activeClusters(ROOT_INDEX)
+    val n = rootSummary.size
+    logInfo(s"Number of points: $n.")
+    logInfo(s"Initial cost: ${rootSummary.cost}.")
+    val minSize = if (minDivisibleClusterSize >= 1.0) {
+      math.ceil(minDivisibleClusterSize).toLong
+    } else {
+      math.ceil(minDivisibleClusterSize * n).toLong
+    }
+    logInfo(s"The minimum number of points of a divisible cluster is $minSize.")
+    var inactiveClusters = mutable.Seq.empty[(Long, ClusterSummary)]
+    val random = new Random(seed)
+    var numLeafClustersNeeded = k - 1
+    var level = 1
+    while (activeClusters.nonEmpty && numLeafClustersNeeded > 0 && level < LEVEL_LIMIT) {
+      // Divisible clusters are sufficiently large and have non-trivial cost.
+      var divisibleClusters = activeClusters.filter { case (_, summary) =>
+        (summary.size >= minSize) && (summary.cost > MLUtils.EPSILON * summary.size)
+      }
+      // If we don't need all divisible clusters, take the larger ones.
+      if (divisibleClusters.size > numLeafClustersNeeded) {
+        divisibleClusters = divisibleClusters.toSeq.sortBy { case (_, summary) =>
+            -summary.size
+          }.take(numLeafClustersNeeded)
+          .toMap
+      }
+      if (divisibleClusters.nonEmpty) {
+        val divisibleIndices = divisibleClusters.keys.toSet
+        logInfo(s"Dividing ${divisibleIndices.size} clusters on level $level.")
+        var newClusterCenters = divisibleClusters.flatMap { case (index, summary) =>
+          val (left, right) = splitCenter(summary.center, random)
+          Iterator((leftChildIndex(index), left), (rightChildIndex(index), right))
+        }.map(identity) // workaround for a Scala bug (SI-7005) that produces a not serializable map
+        var newClusters: Map[Long, ClusterSummary] = null
+        var newAssignments: RDD[(Long, VectorWithNorm)] = null
+        for (iter <- 0 until maxIterations) {
+          newAssignments = updateAssignments(assignments, divisibleIndices, newClusterCenters)
+            .filter { case (index, _) =>
+            divisibleIndices.contains(parentIndex(index))
+          }
+          newClusters = summarize(d, newAssignments)
+          newClusterCenters = newClusters.mapValues(_.center).map(identity)
+        }
+        // TODO: Unpersist old indices.
+        val indices = updateAssignments(assignments, divisibleIndices, newClusterCenters).keys
+          .persist(StorageLevel.MEMORY_AND_DISK)
+        assignments = indices.zip(vectors)
+        inactiveClusters ++= activeClusters
+        activeClusters = newClusters
+        numLeafClustersNeeded -= divisibleClusters.size
+      } else {
+        logInfo(s"None active and divisible clusters left on level $level. Stop iterations.")
+        inactiveClusters ++= activeClusters
+        activeClusters = Map.empty
+      }
+      level += 1
+    }
+    val clusters = activeClusters ++ inactiveClusters
+    val root = buildTree(clusters)
+    new BisectingKMeansModel(root)
+  }
+
+  /**
+   * Java-friendly version of [[run(RDD[Vector])*]]
+   */
+  def run(data: JavaRDD[Vector]): BisectingKMeansModel = run(data.rdd)
+}
+
+private object BisectingKMeans extends Serializable {
+
+  /** The index of the root node of a tree. */
+  private val ROOT_INDEX: Long = 1
+
+  private val MAX_DIVISIBLE_CLUSTER_INDEX: Long = Long.MaxValue / 2
+
+  private val LEVEL_LIMIT = math.log10(Long.MaxValue) / math.log10(2)
+
+  /** Returns the left child index of the given node index. */
+  private def leftChildIndex(index: Long): Long = {
+    require(index <= MAX_DIVISIBLE_CLUSTER_INDEX, s"Child index out of bound: 2 * $index.")
+    2 * index
+  }
+
+  /** Returns the right child index of the given node index. */
+  private def rightChildIndex(index: Long): Long = {
+    require(index <= MAX_DIVISIBLE_CLUSTER_INDEX, s"Child index out of bound: 2 * $index + 1.")
+    2 * index + 1
+  }
+
+  /** Returns the parent index of the given node index, or 0 if the input is 1 (root). */
+  private def parentIndex(index: Long): Long = {
+    index / 2
+  }
+
+  /**
+   * Summarizes data by each cluster as Map.
+   * @param d feature dimension
+   * @param assignments pairs of point and its cluster index
+   * @return a map from cluster indices to corresponding cluster summaries
+   */
+  private def summarize(
+      d: Int,
+      assignments: RDD[(Long, VectorWithNorm)]): Map[Long, ClusterSummary] = {
+    assignments.aggregateByKey(new ClusterSummaryAggregator(d))(
+        seqOp = (agg, v) => agg.add(v),
+        combOp = (agg1, agg2) => agg1.merge(agg2)
+      ).mapValues(_.summary)
+      .collect().toMap
+  }
+
+  /**
+   * Cluster summary aggregator.
+   * @param d feature dimension
+   */
+  private class ClusterSummaryAggregator(val d: Int) extends Serializable {
+    private var n: Long = 0L
+    private val sum: Vector = Vectors.zeros(d)
+    private var sumSq: Double = 0.0
+
+    /** Adds a point. */
+    def add(v: VectorWithNorm): this.type = {
+      n += 1L
+      // TODO: use a numerically stable approach to estimate cost
+      sumSq += v.norm * v.norm
+      BLAS.axpy(1.0, v.vector, sum)
+      this
+    }
+
+    /** Merges another aggregator. */
+    def merge(other: ClusterSummaryAggregator): this.type = {
+      n += other.n
+      sumSq += other.sumSq
+      BLAS.axpy(1.0, other.sum, sum)
+      this
+    }
+
+    /** Returns the summary. */
+    def summary: ClusterSummary = {
+      val mean = sum.copy
+      if (n > 0L) {
+        BLAS.scal(1.0 / n, mean)
+      }
+      val center = new VectorWithNorm(mean)
+      val cost = math.max(sumSq - n * center.norm * center.norm, 0.0)
+      new ClusterSummary(n, center, cost)
+    }
+  }
+
+  /**
+   * Bisects a cluster center.
+   *
+   * @param center current cluster center
+   * @param random a random number generator
+   * @return initial centers
+   */
+  private def splitCenter(
+      center: VectorWithNorm,
+      random: Random): (VectorWithNorm, VectorWithNorm) = {
+    val d = center.vector.size
+    val norm = center.norm
+    val level = 1e-4 * norm
+    val noise = Vectors.dense(Array.fill(d)(random.nextDouble()))
+    val left = center.vector.copy
+    BLAS.axpy(-level, noise, left)
+    val right = center.vector.copy
+    BLAS.axpy(level, noise, right)
+    (new VectorWithNorm(left), new VectorWithNorm(right))
+  }
+
+  /**
+   * Updates assignments.
+   * @param assignments current assignments
+   * @param divisibleIndices divisible cluster indices
+   * @param newClusterCenters new cluster centers
+   * @return new assignments
+   */
+  private def updateAssignments(
+      assignments: RDD[(Long, VectorWithNorm)],
+      divisibleIndices: Set[Long],
+      newClusterCenters: Map[Long, VectorWithNorm]): RDD[(Long, VectorWithNorm)] = {
+    assignments.map { case (index, v) =>
+      if (divisibleIndices.contains(index)) {
+        val children = Seq(leftChildIndex(index), rightChildIndex(index))
+        val selected = children.minBy { child =>
+          KMeans.fastSquaredDistance(newClusterCenters(child), v)
+        }
+        (selected, v)
+      } else {
+        (index, v)
+      }
+    }
+  }
+
+  /**
+   * Builds a clustering tree by re-indexing internal and leaf clusters.
+   * @param clusters a map from cluster indices to corresponding cluster summaries
+   * @return the root node of the clustering tree
+   */
+  private def buildTree(clusters: Map[Long, ClusterSummary]): ClusteringTreeNode = {
+    var leafIndex = 0
+    var internalIndex = -1
+
+    /**
+     * Builds a subtree from this given node index.
+     */
+    def buildSubTree(rawIndex: Long): ClusteringTreeNode = {
+      val cluster = clusters(rawIndex)
+      val size = cluster.size
+      val center = cluster.center
+      val cost = cluster.cost
+      val isInternal = clusters.contains(leftChildIndex(rawIndex))
+      if (isInternal) {
+        val index = internalIndex
+        internalIndex -= 1
+        val leftIndex = leftChildIndex(rawIndex)
+        val rightIndex = rightChildIndex(rawIndex)
+        val height = math.sqrt(Seq(leftIndex, rightIndex).map { childIndex =>
+          KMeans.fastSquaredDistance(center, clusters(childIndex).center)
+        }.max)
+        val left = buildSubTree(leftIndex)
+        val right = buildSubTree(rightIndex)
+        new ClusteringTreeNode(index, size, center, cost, height, Array(left, right))
+      } else {
+        val index = leafIndex
+        leafIndex += 1
+        val height = 0.0
+        new ClusteringTreeNode(index, size, center, cost, height, Array.empty)
+      }
+    }
+
+    buildSubTree(ROOT_INDEX)
+  }
+
+  /**
+   * Summary of a cluster.
+   *
+   * @param size the number of points within this cluster
+   * @param center the center of the points within this cluster
+   * @param cost the sum of squared distances to the center
+   */
+  private case class ClusterSummary(size: Long, center: VectorWithNorm, cost: Double)
+}
+
+/**
+ * Represents a node in a clustering tree.
+ *
+ * @param index node index, negative for internal nodes and non-negative for leaf nodes
+ * @param size size of the cluster
+ * @param centerWithNorm cluster center with norm
+ * @param cost cost of the cluster, i.e., the sum of squared distances to the center
+ * @param height height of the node in the dendrogram. Currently this is defined as the max distance
+ *               from the center to the centers of the children's, but subject to change.
+ * @param children children nodes
+ */
+@Since("1.6.0")
+@Experimental
+class ClusteringTreeNode private[clustering] (
+    val index: Int,
+    val size: Long,
+    private val centerWithNorm: VectorWithNorm,
+    val cost: Double,
+    val height: Double,
+    val children: Array[ClusteringTreeNode]) extends Serializable {
+
+  /** Whether this is a leaf node. */
+  val isLeaf: Boolean = children.isEmpty
+
+  require((isLeaf && index >= 0) || (!isLeaf && index < 0))
+
+  /** Cluster center. */
+  def center: Vector = centerWithNorm.vector
+
+  /** Predicts the leaf cluster node index that the input point belongs to. */
+  def predict(point: Vector): Int = {
+    val (index, _) = predict(new VectorWithNorm(point))
+    index
+  }
+
+  /** Returns the full prediction path from root to leaf. */
+  def predictPath(point: Vector): Array[ClusteringTreeNode] = {
+    predictPath(new VectorWithNorm(point)).toArray
+  }
+
+  /** Returns the full prediction path from root to leaf. */
+  private def predictPath(pointWithNorm: VectorWithNorm): List[ClusteringTreeNode] = {
+    if (isLeaf) {
+      this :: Nil
+    } else {
+      val selected = children.minBy { child =>
+        KMeans.fastSquaredDistance(child.centerWithNorm, pointWithNorm)
+      }
+      selected :: selected.predictPath(pointWithNorm)
+    }
+  }
+
+  /**
+   * Computes the cost (squared distance to the predicted leaf cluster center) of the input point.
+   */
+  def computeCost(point: Vector): Double = {
+    val (_, cost) = predict(new VectorWithNorm(point))
+    cost
+  }
+
+  /**
+   * Predicts the cluster index and the cost of the input point.
+   */
+  private def predict(pointWithNorm: VectorWithNorm): (Int, Double) = {
+    predict(pointWithNorm, KMeans.fastSquaredDistance(centerWithNorm, pointWithNorm))
+  }
+
+  /**
+   * Predicts the cluster index and the cost of the input point.
+   * @param pointWithNorm input point
+   * @param cost the cost to the current center
+   * @return (predicted leaf cluster index, cost)
+   */
+  private def predict(pointWithNorm: VectorWithNorm, cost: Double): (Int, Double) = {
+    if (isLeaf) {
+      (index, cost)
+    } else {
+      val (selectedChild, minCost) = children.map { child =>
+        (child, KMeans.fastSquaredDistance(child.centerWithNorm, pointWithNorm))
+      }.minBy(_._2)
+      selectedChild.predict(pointWithNorm, minCost)
+    }
+  }
+
+  /**
+   * Returns all leaf nodes from this node.
+   */
+  def leafNodes: Array[ClusteringTreeNode] = {
+    if (isLeaf) {
+      Array(this)
+    } else {
+      children.flatMap(_.leafNodes)
+    }
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeansModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeansModel.scala
new file mode 100644
index 000000000000..5015f1540d92
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/BisectingKMeansModel.scala
@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.clustering
+
+import org.apache.spark.Logging
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.api.java.JavaRDD
+import org.apache.spark.mllib.linalg.Vector
+import org.apache.spark.rdd.RDD
+
+/**
+ * Clustering model produced by [[BisectingKMeans]].
+ * The prediction is done level-by-level from the root node to a leaf node, and at each node among
+ * its children the closest to the input point is selected.
+ *
+ * @param root the root node of the clustering tree
+ */
+@Since("1.6.0")
+@Experimental
+class BisectingKMeansModel @Since("1.6.0") (
+    @Since("1.6.0") val root: ClusteringTreeNode
+  ) extends Serializable with Logging {
+
+  /**
+   * Leaf cluster centers.
+   */
+  @Since("1.6.0")
+  def clusterCenters: Array[Vector] = root.leafNodes.map(_.center)
+
+  /**
+   * Number of leaf clusters.
+   */
+  lazy val k: Int = clusterCenters.length
+
+  /**
+   * Predicts the index of the cluster that the input point belongs to.
+   */
+  @Since("1.6.0")
+  def predict(point: Vector): Int = {
+    root.predict(point)
+  }
+
+  /**
+   * Predicts the indices of the clusters that the input points belong to.
+   */
+  @Since("1.6.0")
+  def predict(points: RDD[Vector]): RDD[Int] = {
+    points.map { p => root.predict(p) }
+  }
+
+  /**
+   * Java-friendly version of [[predict(RDD[Vector])*]]
+   */
+  @Since("1.6.0")
+  def predict(points: JavaRDD[Vector]): JavaRDD[java.lang.Integer] =
+    predict(points.rdd).toJavaRDD().asInstanceOf[JavaRDD[java.lang.Integer]]
+
+  /**
+   * Computes the squared distance between the input point and the cluster center it belongs to.
+   */
+  @Since("1.6.0")
+  def computeCost(point: Vector): Double = {
+    root.computeCost(point)
+  }
+
+  /**
+   * Computes the sum of squared distances between the input points and their corresponding cluster
+   * centers.
+   */
+  @Since("1.6.0")
+  def computeCost(data: RDD[Vector]): Double = {
+    data.map(root.computeCost).sum()
+  }
+
+  /**
+   * Java-friendly version of [[computeCost(RDD[Vector])*]].
+   */
+  @Since("1.6.0")
+  def computeCost(data: JavaRDD[Vector]): Double = this.computeCost(data.rdd)
+}
diff --git a/mllib/src/test/java/org/apache/spark/mllib/clustering/JavaBisectingKMeansSuite.java b/mllib/src/test/java/org/apache/spark/mllib/clustering/JavaBisectingKMeansSuite.java
new file mode 100644
index 000000000000..a714620ff7e4
--- /dev/null
+++ b/mllib/src/test/java/org/apache/spark/mllib/clustering/JavaBisectingKMeansSuite.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.clustering;
+
+import java.io.Serializable;
+
+import com.google.common.collect.Lists;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.mllib.linalg.Vector;
+import org.apache.spark.mllib.linalg.Vectors;
+
+public class JavaBisectingKMeansSuite implements Serializable {
+  private transient JavaSparkContext sc;
+
+  @Before
+  public void setUp() {
+    sc = new JavaSparkContext("local", this.getClass().getSimpleName());
+  }
+
+  @After
+  public void tearDown() {
+    sc.stop();
+    sc = null;
+  }
+
+  @Test
+  public void twoDimensionalData() {
+    JavaRDD<Vector> points = sc.parallelize(Lists.newArrayList(
+      Vectors.dense(4, -1),
+      Vectors.dense(4, 1),
+      Vectors.sparse(2, new int[] {0}, new double[] {1.0})
+    ), 2);
+
+    BisectingKMeans bkm = new BisectingKMeans()
+      .setK(4)
+      .setMaxIterations(2)
+      .setSeed(1L);
+    BisectingKMeansModel model = bkm.run(points);
+    Assert.assertEquals(3, model.k());
+    Assert.assertArrayEquals(new double[] {3.0, 0.0}, model.root().center().toArray(), 1e-12);
+    for (ClusteringTreeNode child: model.root().children()) {
+      double[] center = child.center().toArray();
+      if (center[0] > 2) {
+        Assert.assertEquals(2, child.size());
+        Assert.assertArrayEquals(new double[] {4.0, 0.0}, center, 1e-12);
+      } else {
+        Assert.assertEquals(1, child.size());
+        Assert.assertArrayEquals(new double[] {1.0, 0.0}, center, 1e-12);
+      }
+    }
+  }
+}
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/clustering/BisectingKMeansSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/clustering/BisectingKMeansSuite.scala
new file mode 100644
index 000000000000..41b9d5c0d93b
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/mllib/clustering/BisectingKMeansSuite.scala
@@ -0,0 +1,182 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.clustering
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.linalg.Vectors
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.mllib.util.TestingUtils._
+
+class BisectingKMeansSuite extends SparkFunSuite with MLlibTestSparkContext {
+
+  test("default values") {
+    val bkm0 = new BisectingKMeans()
+    assert(bkm0.getK === 4)
+    assert(bkm0.getMaxIterations === 20)
+    assert(bkm0.getMinDivisibleClusterSize === 1.0)
+    val bkm1 = new BisectingKMeans()
+    assert(bkm0.getSeed === bkm1.getSeed, "The default seed should be constant.")
+  }
+
+  test("setter/getter") {
+    val bkm = new BisectingKMeans()
+
+    val k = 10
+    assert(bkm.getK !== k)
+    assert(bkm.setK(k).getK === k)
+    val maxIter = 100
+    assert(bkm.getMaxIterations !== maxIter)
+    assert(bkm.setMaxIterations(maxIter).getMaxIterations === maxIter)
+    val minSize = 2.0
+    assert(bkm.getMinDivisibleClusterSize !== minSize)
+    assert(bkm.setMinDivisibleClusterSize(minSize).getMinDivisibleClusterSize === minSize)
+    val seed = 10L
+    assert(bkm.getSeed !== seed)
+    assert(bkm.setSeed(seed).getSeed === seed)
+
+    intercept[IllegalArgumentException] {
+      bkm.setK(0)
+    }
+    intercept[IllegalArgumentException] {
+      bkm.setMaxIterations(0)
+    }
+    intercept[IllegalArgumentException] {
+      bkm.setMinDivisibleClusterSize(0.0)
+    }
+  }
+
+  test("1D data") {
+    val points = Vectors.sparse(1, Array.empty, Array.empty) +:
+      (1 until 8).map(i => Vectors.dense(i))
+    val data = sc.parallelize(points, 2)
+    val bkm = new BisectingKMeans()
+      .setK(4)
+      .setMaxIterations(1)
+      .setSeed(1L)
+    // The clusters should be
+    // (0, 1, 2, 3, 4, 5, 6, 7)
+    //   - (0, 1, 2, 3)
+    //     - (0, 1)
+    //     - (2, 3)
+    //   - (4, 5, 6, 7)
+    //     - (4, 5)
+    //     - (6, 7)
+    val model = bkm.run(data)
+    assert(model.k === 4)
+    // The total cost should be 8 * 0.5 * 0.5 = 2.0.
+    assert(model.computeCost(data) ~== 2.0 relTol 1e-12)
+    val predictions = data.map(v => (v(0), model.predict(v))).collectAsMap()
+    Range(0, 8, 2).foreach { i =>
+      assert(predictions(i) === predictions(i + 1),
+        s"$i and ${i + 1} should belong to the same cluster.")
+    }
+    val root = model.root
+    assert(root.center(0) ~== 3.5 relTol 1e-12)
+    assert(root.height ~== 2.0 relTol 1e-12)
+    assert(root.children.length === 2)
+    assert(root.children(0).height ~== 1.0 relTol 1e-12)
+    assert(root.children(1).height ~== 1.0 relTol 1e-12)
+  }
+
+  test("points are the same") {
+    val data = sc.parallelize(Seq.fill(8)(Vectors.dense(1.0, 1.0)), 2)
+    val bkm = new BisectingKMeans()
+      .setK(2)
+      .setMaxIterations(1)
+      .setSeed(1L)
+    val model = bkm.run(data)
+    assert(model.k === 1)
+  }
+
+  test("more desired clusters than points") {
+    val data = sc.parallelize(Seq.tabulate(4)(i => Vectors.dense(i)), 2)
+    val bkm = new BisectingKMeans()
+      .setK(8)
+      .setMaxIterations(2)
+      .setSeed(1L)
+    val model = bkm.run(data)
+    assert(model.k === 4)
+  }
+
+  test("min divisible cluster") {
+    val data = sc.parallelize(
+      Seq.tabulate(16)(i => Vectors.dense(i)) ++ Seq.tabulate(4)(i => Vectors.dense(-100.0 - i)),
+      2)
+    val bkm = new BisectingKMeans()
+      .setK(4)
+      .setMinDivisibleClusterSize(10)
+      .setMaxIterations(1)
+      .setSeed(1L)
+    val model = bkm.run(data)
+    assert(model.k === 3)
+    assert(model.predict(Vectors.dense(-100)) === model.predict(Vectors.dense(-97)))
+    assert(model.predict(Vectors.dense(7)) !== model.predict(Vectors.dense(8)))
+
+    bkm.setMinDivisibleClusterSize(0.5)
+    val sameModel = bkm.run(data)
+    assert(sameModel.k === 3)
+  }
+
+  test("larger clusters get selected first") {
+    val data = sc.parallelize(
+      Seq.tabulate(16)(i => Vectors.dense(i)) ++ Seq.tabulate(4)(i => Vectors.dense(-100.0 - i)),
+      2)
+    val bkm = new BisectingKMeans()
+      .setK(3)
+      .setMaxIterations(1)
+      .setSeed(1L)
+    val model = bkm.run(data)
+    assert(model.k === 3)
+    assert(model.predict(Vectors.dense(-100)) === model.predict(Vectors.dense(-97)))
+    assert(model.predict(Vectors.dense(7)) !== model.predict(Vectors.dense(8)))
+  }
+
+  test("2D data") {
+    val points = Seq(
+      (11, 10), (9, 10), (10, 9), (10, 11),
+      (11, -10), (9, -10), (10, -9), (10, -11),
+      (0, 1), (0, -1)
+    ).map { case (x, y) =>
+      if (x == 0) {
+        Vectors.sparse(2, Array(1), Array(y))
+      } else {
+        Vectors.dense(x, y)
+      }
+    }
+    val data = sc.parallelize(points, 2)
+    val bkm = new BisectingKMeans()
+      .setK(3)
+      .setMaxIterations(4)
+      .setSeed(1L)
+    val model = bkm.run(data)
+    assert(model.k === 3)
+    assert(model.root.center ~== Vectors.dense(8, 0) relTol 1e-12)
+    model.root.leafNodes.foreach { node =>
+      if (node.center(0) < 5) {
+        assert(node.size === 2)
+        assert(node.center ~== Vectors.dense(0, 0) relTol 1e-12)
+      } else if (node.center(1) > 0) {
+        assert(node.size === 4)
+        assert(node.center ~== Vectors.dense(10, 10) relTol 1e-12)
+      } else {
+        assert(node.size === 4)
+        assert(node.center ~== Vectors.dense(10, -10) relTol 1e-12)
+      }
+    }
+  }
+}

From fcb57e9c7323e24b8563800deb035f94f616474e Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 9 Nov 2015 15:16:47 -0800
Subject: [PATCH 577/896] [SPARK-11564][SQL][FOLLOW-UP] improve java api for
 GroupedDataset

created `MapGroupFunction`, `FlatMapGroupFunction`, `CoGroupFunction`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9564 from cloud-fan/map.
---
 .../api/java/function/CoGroupFunction.java    | 29 +++++++++++++++
 .../api/java/function/FlatMapFunction.java    |  2 +-
 .../api/java/function/FlatMapFunction2.java   |  2 +-
 .../java/function/FlatMapGroupFunction.java   | 28 +++++++++++++++
 .../api/java/function/MapGroupFunction.java   | 28 +++++++++++++++
 .../plans/logical/basicOperators.scala        |  4 +--
 .../org/apache/spark/sql/GroupedDataset.scala | 12 +++----
 .../spark/sql/execution/basicOperators.scala  |  2 +-
 .../apache/spark/sql/JavaDatasetSuite.java    | 36 ++++++++++++-------
 9 files changed, 118 insertions(+), 25 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/CoGroupFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java

diff --git a/core/src/main/java/org/apache/spark/api/java/function/CoGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/CoGroupFunction.java
new file mode 100644
index 000000000000..279639af5d43
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/CoGroupFunction.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+/**
+ * A function that returns zero or more output records from each grouping key and its values from 2
+ * Datasets.
+ */
+public interface CoGroupFunction<K, V1, V2, R> extends Serializable {
+  Iterable<R> call(K key, Iterator<V1> left, Iterator<V2> right) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction.java b/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction.java
index 23f5fdd43631..ef0d1824121e 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction.java
@@ -23,5 +23,5 @@
  * A function that returns zero or more output records from each input record.
  */
 public interface FlatMapFunction<T, R> extends Serializable {
-  public Iterable<R> call(T t) throws Exception;
+  Iterable<R> call(T t) throws Exception;
 }
diff --git a/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction2.java b/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction2.java
index c48e92f535ff..14a98a38ef5a 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction2.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/FlatMapFunction2.java
@@ -23,5 +23,5 @@
  * A function that takes two inputs and returns zero or more output records.
  */
 public interface FlatMapFunction2<T1, T2, R> extends Serializable {
-  public Iterable<R> call(T1 t1, T2 t2) throws Exception;
+  Iterable<R> call(T1 t1, T2 t2) throws Exception;
 }
diff --git a/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java
new file mode 100644
index 000000000000..18a2d733ca70
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+/**
+ * A function that returns zero or more output records from each grouping key and its values.
+ */
+public interface FlatMapGroupFunction<K, V, R> extends Serializable {
+  Iterable<R> call(K key, Iterator<V> values) throws Exception;
+}
diff --git a/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
new file mode 100644
index 000000000000..2935f9986a56
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+import java.util.Iterator;
+
+/**
+ * Base interface for a map function used in GroupedDataset's map function.
+ */
+public interface MapGroupFunction<K, V, R> extends Serializable {
+  R call(K key, Iterator<V> values) throws Exception;
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index e151ac04ede2..d771088d69de 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -527,7 +527,7 @@ case class MapGroups[K, T, U](
 /** Factory for constructing new `CoGroup` nodes. */
 object CoGroup {
   def apply[K : Encoder, Left : Encoder, Right : Encoder, R : Encoder](
-      func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+      func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
       leftGroup: Seq[Attribute],
       rightGroup: Seq[Attribute],
       left: LogicalPlan,
@@ -551,7 +551,7 @@ object CoGroup {
  * right children.
  */
 case class CoGroup[K, Left, Right, R](
-    func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+    func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
     kEncoder: ExpressionEncoder[K],
     leftEnc: ExpressionEncoder[Left],
     rightEnc: ExpressionEncoder[Right],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 5c3f62654587..850315e281df 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -108,9 +108,7 @@ class GroupedDataset[K, T] private[sql](
       MapGroups(f, groupingAttributes, logicalPlan))
   }
 
-  def flatMap[U](
-      f: JFunction2[K, JIterator[T], JIterator[U]],
-      encoder: Encoder[U]): Dataset[U] = {
+  def flatMap[U](f: FlatMapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
     flatMap((key, data) => f.call(key, data.asJava).asScala)(encoder)
   }
 
@@ -131,9 +129,7 @@ class GroupedDataset[K, T] private[sql](
       MapGroups(func, groupingAttributes, logicalPlan))
   }
 
-  def map[U](
-      f: JFunction2[K, JIterator[T], U],
-      encoder: Encoder[U]): Dataset[U] = {
+  def map[U](f: MapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
     map((key, data) => f.call(key, data.asJava))(encoder)
   }
 
@@ -218,7 +214,7 @@ class GroupedDataset[K, T] private[sql](
    */
   def cogroup[U, R : Encoder](
       other: GroupedDataset[K, U])(
-      f: (K, Iterator[T], Iterator[U]) => Iterator[R]): Dataset[R] = {
+      f: (K, Iterator[T], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
     implicit def uEnc: Encoder[U] = other.tEncoder
     new Dataset[R](
       sqlContext,
@@ -232,7 +228,7 @@ class GroupedDataset[K, T] private[sql](
 
   def cogroup[U, R](
       other: GroupedDataset[K, U],
-      f: JFunction3[K, JIterator[T], JIterator[U], JIterator[R]],
+      f: CoGroupFunction[K, T, U, R],
       encoder: Encoder[R]): Dataset[R] = {
     cogroup(other)((key, left, right) => f.call(key, left.asJava, right.asJava).asScala)(encoder)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 2593b16b1c8d..145de0db9eda 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -391,7 +391,7 @@ case class MapGroups[K, T, U](
  * The result of this function is encoded and flattened before being output.
  */
 case class CoGroup[K, Left, Right, R](
-    func: (K, Iterator[Left], Iterator[Right]) => Iterator[R],
+    func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
     kEncoder: ExpressionEncoder[K],
     leftEnc: ExpressionEncoder[Left],
     rightEnc: ExpressionEncoder[Right],
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 0f90de774dd3..312cf33e4c2d 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -29,7 +29,6 @@
 import org.apache.spark.Accumulator;
 import org.apache.spark.SparkContext;
 import org.apache.spark.api.java.function.*;
-import org.apache.spark.api.java.function.Function;
 import org.apache.spark.api.java.JavaSparkContext;
 import org.apache.spark.sql.catalyst.encoders.Encoder;
 import org.apache.spark.sql.catalyst.encoders.Encoder$;
@@ -170,20 +169,33 @@ public Integer call(String v) throws Exception {
       }
     }, e.INT());
 
-    Dataset<String> mapped = grouped.map(
-      new Function2<Integer, Iterator<String>, String>() {
+    Dataset<String> mapped = grouped.map(new MapGroupFunction<Integer, String, String>() {
+      @Override
+      public String call(Integer key, Iterator<String> values) throws Exception {
+        StringBuilder sb = new StringBuilder(key.toString());
+        while (values.hasNext()) {
+          sb.append(values.next());
+        }
+        return sb.toString();
+      }
+    }, e.STRING());
+
+    Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
+
+    Dataset<String> flatMapped = grouped.flatMap(
+      new FlatMapGroupFunction<Integer, String, String>() {
         @Override
-        public String call(Integer key, Iterator<String> data) throws Exception {
+        public Iterable<String> call(Integer key, Iterator<String> values) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
-          while (data.hasNext()) {
-            sb.append(data.next());
+          while (values.hasNext()) {
+            sb.append(values.next());
           }
-          return sb.toString();
+          return Collections.singletonList(sb.toString());
         }
       },
       e.STRING());
 
-    Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
+    Assert.assertEquals(Arrays.asList("1a", "3foobar"), flatMapped.collectAsList());
 
     List<Integer> data2 = Arrays.asList(2, 6, 10);
     Dataset<Integer> ds2 = context.createDataset(data2, e.INT());
@@ -196,9 +208,9 @@ public Integer call(Integer v) throws Exception {
 
     Dataset<String> cogrouped = grouped.cogroup(
       grouped2,
-      new Function3<Integer, Iterator<String>, Iterator<Integer>, Iterator<String>>() {
+      new CoGroupFunction<Integer, String, Integer, String>() {
         @Override
-        public Iterator<String> call(
+        public Iterable<String> call(
             Integer key,
             Iterator<String> left,
             Iterator<Integer> right) throws Exception {
@@ -210,7 +222,7 @@ public Iterator<String> call(
           while (right.hasNext()) {
             sb.append(right.next());
           }
-          return Collections.singletonList(sb.toString()).iterator();
+          return Collections.singletonList(sb.toString());
         }
       },
       e.STRING());
@@ -225,7 +237,7 @@ public void testGroupByColumn() {
     GroupedDataset<Integer, String> grouped = ds.groupBy(length(col("value"))).asKey(e.INT());
 
     Dataset<String> mapped = grouped.map(
-      new Function2<Integer, Iterator<String>, String>() {
+      new MapGroupFunction<Integer, String, String>() {
         @Override
         public String call(Integer key, Iterator<String> data) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());

From 9565c246eadecf4836d247d0067f2200f061d25f Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Mon, 9 Nov 2015 15:20:50 -0800
Subject: [PATCH 578/896] [SPARK-9557][SQL] Refactor ParquetFilterSuite and
 remove old ParquetFilters code

Actually this was resolved by https://github.com/apache/spark/pull/8275.

But I found the JIRA issue for this is not marked as resolved since the PR above was made for another issue but the PR above resolved both.

I commented that this is resolved by the PR above; however, I opened this PR as I would like to just add
a little bit of corrections.

In the previous PR, I refactored the test by not reducing just collecting filters; however, this would not test  properly `And` filter (which is not given to the tests). I unintentionally changed this from the original way (before being refactored).

In this PR, I just followed the original way to collect filters by reducing.

I would like to close this if this PR is inappropriate and somebody would like this deal with it in the separate PR related with this.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #9554 from HyukjinKwon/SPARK-9557.
---
 .../datasources/parquet/ParquetFilterSuite.scala          | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index c24c9f025dad..579dabf73318 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -54,12 +54,12 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
         .select(output.map(e => Column(e)): _*)
         .where(Column(predicate))
 
-      val analyzedPredicate = query.queryExecution.optimizedPlan.collect {
+      val maybeAnalyzedPredicate = query.queryExecution.optimizedPlan.collect {
         case PhysicalOperation(_, filters, LogicalRelation(_: ParquetRelation, _)) => filters
-      }.flatten
-      assert(analyzedPredicate.nonEmpty)
+      }.flatten.reduceLeftOption(_ && _)
+      assert(maybeAnalyzedPredicate.isDefined)
 
-      val selectedFilters = analyzedPredicate.flatMap(DataSourceStrategy.translateFilter)
+      val selectedFilters = maybeAnalyzedPredicate.flatMap(DataSourceStrategy.translateFilter)
       assert(selectedFilters.nonEmpty)
 
       selectedFilters.foreach { pred =>

From 2f38378856fb56bdd9be7ccedf56427e81701f4e Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Mon, 9 Nov 2015 16:06:48 -0800
Subject: [PATCH 579/896] [SPARK-11360][DOC] Loss of nullability when writing
 parquet files

This fix is to add one line to explain the current behavior of Spark SQL when writing Parquet files. All columns are forced to be nullable for compatibility reasons.

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9314 from gatorsmile/lossNull.
---
 docs/sql-programming-guide.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index ccd26904329d..6e02d6564b00 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -982,7 +982,8 @@ when a table is dropped.
 
 [Parquet](http://parquet.io) is a columnar format that is supported by many other data processing systems.
 Spark SQL provides support for both reading and writing Parquet files that automatically preserves the schema
-of the original data.
+of the original data. When writing Parquet files, all columns are automatically converted to be nullable for 
+compatibility reasons.
 
 ### Loading Data Programmatically
 

From 9c740a9ddf6344a03b4b45380eaf0cfc6e2299b5 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Mon, 9 Nov 2015 16:11:00 -0800
Subject: [PATCH 580/896] [SPARK-11578][SQL] User API for Typed Aggregation

This PR adds a new interface for user-defined aggregations, that can be used in `DataFrame` and `Dataset` operations to take all of the elements of a group and reduce them to a single value.

For example, the following aggregator extracts an `int` from a specific class and adds them up:

```scala
  case class Data(i: Int)

  val customSummer =  new Aggregator[Data, Int, Int] {
    def prepare(d: Data) = d.i
    def reduce(l: Int, r: Int) = l + r
    def present(r: Int) = r
  }.toColumn()

  val ds: Dataset[Data] = ...
  val aggregated = ds.select(customSummer)
```

By using helper functions, users can make a generic `Aggregator` that works on any input type:

```scala
/** An `Aggregator` that adds up any numeric type returned by the given function. */
class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializable {
  val numeric = implicitly[Numeric[N]]
  override def zero: N = numeric.zero
  override def reduce(b: N, a: I): N = numeric.plus(b, f(a))
  override def present(reduction: N): N = reduction
}

def sum[I, N : Numeric : Encoder](f: I => N): TypedColumn[I, N] = new SumOf(f).toColumn
```

These aggregators can then be used alongside other built-in SQL aggregations.

```scala
val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
ds
  .groupBy(_._1)
  .agg(
    sum(_._2),                // The aggregator defined above.
    expr("sum(_2)").as[Int],  // A built-in dynatically typed aggregation.
    count("*"))               // A built-in statically typed aggregation.
  .collect()

res0: ("a", 30, 30, 2L), ("b", 3, 3, 2L), ("c", 1, 1, 1L)
```

The current implementation focuses on integrating this into the typed API, but currently only supports running aggregations that return a single long value as explained in `TypedAggregateExpression`.  This will be improved in a followup PR.

Author: Michael Armbrust <michael@databricks.com>

Closes #9555 from marmbrus/dataset-useragg.
---
 .../scala/org/apache/spark/sql/Column.scala   |  11 +-
 .../scala/org/apache/spark/sql/Dataset.scala  |  30 ++--
 .../org/apache/spark/sql/GroupedDataset.scala |  51 ++++---
 .../org/apache/spark/sql/SQLContext.scala     |   1 -
 .../aggregate/TypedAggregateExpression.scala  | 129 ++++++++++++++++++
 .../spark/sql/expressions/Aggregator.scala    |  81 +++++++++++
 .../org/apache/spark/sql/functions.scala      |  30 +++-
 .../apache/spark/sql/JavaDatasetSuite.java    |   4 +-
 .../spark/sql/DatasetAggregatorSuite.scala    |  65 +++++++++
 9 files changed, 360 insertions(+), 42 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index c32c93897ce0..d26b6c357920 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -23,7 +23,7 @@ import org.apache.spark.annotation.Experimental
 import org.apache.spark.Logging
 import org.apache.spark.sql.functions.lit
 import org.apache.spark.sql.catalyst.analysis._
-import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
@@ -39,10 +39,13 @@ private[sql] object Column {
 }
 
 /**
- * A [[Column]] where an [[Encoder]] has been given for the expected return type.
+ * A [[Column]] where an [[Encoder]] has been given for the expected input and return type.
  * @since 1.6.0
+ * @tparam T The input type expected for this expression.  Can be `Any` if the expression is type
+ *           checked by the analyzer instead of the compiler (i.e. `expr("sum(...)")`).
+ * @tparam U The output type of this column.
  */
-class TypedColumn[T](expr: Expression)(implicit val encoder: Encoder[T]) extends Column(expr)
+class TypedColumn[-T, U](expr: Expression, val encoder: Encoder[U]) extends Column(expr)
 
 /**
  * :: Experimental ::
@@ -85,7 +88,7 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    * results into the correct JVM types.
    * @since 1.6.0
    */
-  def as[T : Encoder]: TypedColumn[T] = new TypedColumn[T](expr)
+  def as[U : Encoder]: TypedColumn[Any, U] = new TypedColumn[Any, U](expr, encoderFor[U])
 
   /**
    * Extracts a value or values from a complex type.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 959e0f5ba03e..6d2968e2881f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -358,7 +358,7 @@ class Dataset[T] private[sql](
    * }}}
    * @since 1.6.0
    */
-  def select[U1: Encoder](c1: TypedColumn[U1]): Dataset[U1] = {
+  def select[U1: Encoder](c1: TypedColumn[T, U1]): Dataset[U1] = {
     new Dataset[U1](sqlContext, Project(Alias(c1.expr, "_1")() :: Nil, logicalPlan))
   }
 
@@ -367,7 +367,7 @@ class Dataset[T] private[sql](
    * code reuse, we do this without the help of the type system and then use helper functions
    * that cast appropriately for the user facing interface.
    */
-  protected def selectUntyped(columns: TypedColumn[_]*): Dataset[_] = {
+  protected def selectUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
     val aliases = columns.zipWithIndex.map { case (c, i) => Alias(c.expr, s"_${i + 1}")() }
     val unresolvedPlan = Project(aliases, logicalPlan)
     val execution = new QueryExecution(sqlContext, unresolvedPlan)
@@ -385,7 +385,7 @@ class Dataset[T] private[sql](
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
    */
-  def select[U1, U2](c1: TypedColumn[U1], c2: TypedColumn[U2]): Dataset[(U1, U2)] =
+  def select[U1, U2](c1: TypedColumn[T, U1], c2: TypedColumn[T, U2]): Dataset[(U1, U2)] =
     selectUntyped(c1, c2).asInstanceOf[Dataset[(U1, U2)]]
 
   /**
@@ -393,9 +393,9 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1, U2, U3](
-      c1: TypedColumn[U1],
-      c2: TypedColumn[U2],
-      c3: TypedColumn[U3]): Dataset[(U1, U2, U3)] =
+      c1: TypedColumn[T, U1],
+      c2: TypedColumn[T, U2],
+      c3: TypedColumn[T, U3]): Dataset[(U1, U2, U3)] =
     selectUntyped(c1, c2, c3).asInstanceOf[Dataset[(U1, U2, U3)]]
 
   /**
@@ -403,10 +403,10 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1, U2, U3, U4](
-      c1: TypedColumn[U1],
-      c2: TypedColumn[U2],
-      c3: TypedColumn[U3],
-      c4: TypedColumn[U4]): Dataset[(U1, U2, U3, U4)] =
+      c1: TypedColumn[T, U1],
+      c2: TypedColumn[T, U2],
+      c3: TypedColumn[T, U3],
+      c4: TypedColumn[T, U4]): Dataset[(U1, U2, U3, U4)] =
     selectUntyped(c1, c2, c3, c4).asInstanceOf[Dataset[(U1, U2, U3, U4)]]
 
   /**
@@ -414,11 +414,11 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1, U2, U3, U4, U5](
-      c1: TypedColumn[U1],
-      c2: TypedColumn[U2],
-      c3: TypedColumn[U3],
-      c4: TypedColumn[U4],
-      c5: TypedColumn[U5]): Dataset[(U1, U2, U3, U4, U5)] =
+      c1: TypedColumn[T, U1],
+      c2: TypedColumn[T, U2],
+      c3: TypedColumn[T, U3],
+      c4: TypedColumn[T, U4],
+      c5: TypedColumn[T, U5]): Dataset[(U1, U2, U3, U4, U5)] =
     selectUntyped(c1, c2, c3, c4, c5).asInstanceOf[Dataset[(U1, U2, U3, U4, U5)]]
 
   /* **************** *
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 850315e281df..db6149922928 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql
 
 import java.util.{Iterator => JIterator}
+
 import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
@@ -26,8 +27,10 @@ import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttrib
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, Alias, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.execution.QueryExecution
 
+
 /**
  * :: Experimental ::
  * A [[Dataset]] has been logically grouped by a user specified grouping key.  Users should not
@@ -143,7 +146,7 @@ class GroupedDataset[K, T] private[sql](
    * that cast appropriately for the user facing interface.
    * TODO: does not handle aggrecations that return nonflat results,
    */
-  protected def aggUntyped(columns: TypedColumn[_]*): Dataset[_] = {
+  protected def aggUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
     val aliases = (groupingAttributes ++ columns.map(_.expr)).map {
       case u: UnresolvedAttribute => UnresolvedAlias(u)
       case expr: NamedExpression => expr
@@ -151,7 +154,15 @@ class GroupedDataset[K, T] private[sql](
     }
 
     val unresolvedPlan = Aggregate(groupingAttributes, aliases, logicalPlan)
-    val execution = new QueryExecution(sqlContext, unresolvedPlan)
+
+    // Fill in the input encoders for any aggregators in the plan.
+    val withEncoders = unresolvedPlan transformAllExpressions {
+      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
+        ta.copy(
+          aEncoder = Some(tEnc.asInstanceOf[ExpressionEncoder[Any]]),
+          children = dataAttributes)
+    }
+    val execution = new QueryExecution(sqlContext, withEncoders)
 
     val columnEncoders = columns.map(_.encoder.asInstanceOf[ExpressionEncoder[_]])
 
@@ -162,43 +173,47 @@ class GroupedDataset[K, T] private[sql](
       case (e, a) =>
         e.unbind(a :: Nil).resolve(execution.analyzed.output)
     }
-    new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
+
+    new Dataset(
+      sqlContext,
+      execution,
+      ExpressionEncoder.tuple(encoders))
   }
 
   /**
    * Computes the given aggregation, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing this aggregation over all elements in the group.
    */
-  def agg[A1](col1: TypedColumn[A1]): Dataset[(K, A1)] =
-    aggUntyped(col1).asInstanceOf[Dataset[(K, A1)]]
+  def agg[U1](col1: TypedColumn[T, U1]): Dataset[(K, U1)] =
+    aggUntyped(col1).asInstanceOf[Dataset[(K, U1)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
    */
-  def agg[A1, A2](col1: TypedColumn[A1], col2: TypedColumn[A2]): Dataset[(K, A1, A2)] =
-    aggUntyped(col1, col2).asInstanceOf[Dataset[(K, A1, A2)]]
+  def agg[U1, U2](col1: TypedColumn[T, U1], col2: TypedColumn[T, U2]): Dataset[(K, U1, U2)] =
+    aggUntyped(col1, col2).asInstanceOf[Dataset[(K, U1, U2)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
    */
-  def agg[A1, A2, A3](
-      col1: TypedColumn[A1],
-      col2: TypedColumn[A2],
-      col3: TypedColumn[A3]): Dataset[(K, A1, A2, A3)] =
-    aggUntyped(col1, col2, col3).asInstanceOf[Dataset[(K, A1, A2, A3)]]
+  def agg[U1, U2, U3](
+      col1: TypedColumn[T, U1],
+      col2: TypedColumn[T, U2],
+      col3: TypedColumn[T, U3]): Dataset[(K, U1, U2, U3)] =
+    aggUntyped(col1, col2, col3).asInstanceOf[Dataset[(K, U1, U2, U3)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
    */
-  def agg[A1, A2, A3, A4](
-      col1: TypedColumn[A1],
-      col2: TypedColumn[A2],
-      col3: TypedColumn[A3],
-      col4: TypedColumn[A4]): Dataset[(K, A1, A2, A3, A4)] =
-    aggUntyped(col1, col2, col3, col4).asInstanceOf[Dataset[(K, A1, A2, A3, A4)]]
+  def agg[U1, U2, U3, U4](
+      col1: TypedColumn[T, U1],
+      col2: TypedColumn[T, U2],
+      col3: TypedColumn[T, U3],
+      col4: TypedColumn[T, U4]): Dataset[(K, U1, U2, U3, U4)] =
+    aggUntyped(col1, col2, col3, col4).asInstanceOf[Dataset[(K, U1, U2, U3, U4)]]
 
   /**
    * Returns a [[Dataset]] that contains a tuple with each key and the number of items present
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 5598731af5fc..1cf1e30f967c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -21,7 +21,6 @@ import java.beans.{BeanInfo, Introspector}
 import java.util.Properties
 import java.util.concurrent.atomic.AtomicReference
 
-
 import scala.collection.JavaConverters._
 import scala.collection.immutable
 import scala.reflect.runtime.universe.TypeTag
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
new file mode 100644
index 000000000000..24d8122b6222
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -0,0 +1,129 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.aggregate
+
+import scala.language.existentials
+
+import org.apache.spark.Logging
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.expressions.aggregate.ImperativeAggregate
+import org.apache.spark.sql.expressions.Aggregator
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types.{StructType, DataType}
+
+object TypedAggregateExpression {
+  def apply[A, B : Encoder, C : Encoder](
+      aggregator: Aggregator[A, B, C]): TypedAggregateExpression = {
+    new TypedAggregateExpression(
+      aggregator.asInstanceOf[Aggregator[Any, Any, Any]],
+      None,
+      encoderFor[B].asInstanceOf[ExpressionEncoder[Any]],
+      encoderFor[C].asInstanceOf[ExpressionEncoder[Any]],
+      Nil,
+      0,
+      0)
+  }
+}
+
+/**
+ * This class is a rough sketch of how to hook `Aggregator` into the Aggregation system.  It has
+ * the following limitations:
+ *  - It assumes the aggregator reduces and returns a single column of type `long`.
+ *  - It might only work when there is a single aggregator in the first column.
+ *  - It assumes the aggregator has a zero, `0`.
+ */
+case class TypedAggregateExpression(
+    aggregator: Aggregator[Any, Any, Any],
+    aEncoder: Option[ExpressionEncoder[Any]],
+    bEncoder: ExpressionEncoder[Any],
+    cEncoder: ExpressionEncoder[Any],
+    children: Seq[Expression],
+    mutableAggBufferOffset: Int,
+    inputAggBufferOffset: Int)
+  extends ImperativeAggregate with Logging {
+
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
+
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
+
+  override def nullable: Boolean = true
+
+  // TODO: this assumes flat results...
+  override def dataType: DataType = cEncoder.schema.head.dataType
+
+  override def deterministic: Boolean = true
+
+  override lazy val resolved: Boolean = aEncoder.isDefined
+
+  override lazy val inputTypes: Seq[DataType] =
+    aEncoder.map(_.schema.map(_.dataType)).getOrElse(Nil)
+
+  override val aggBufferSchema: StructType = bEncoder.schema
+
+  override val aggBufferAttributes: Seq[AttributeReference] = aggBufferSchema.toAttributes
+
+  // Note: although this simply copies aggBufferAttributes, this common code can not be placed
+  // in the superclass because that will lead to initialization ordering issues.
+  override val inputAggBufferAttributes: Seq[AttributeReference] =
+    aggBufferAttributes.map(_.newInstance())
+
+  lazy val inputAttributes = aEncoder.get.schema.toAttributes
+  lazy val inputMapping = AttributeMap(inputAttributes.zip(children))
+  lazy val boundA =
+    aEncoder.get.copy(constructExpression = aEncoder.get.constructExpression transform {
+      case a: AttributeReference => inputMapping(a)
+    })
+
+  // TODO: this probably only works when we are in the first column.
+  val bAttributes = bEncoder.schema.toAttributes
+  lazy val boundB = bEncoder.resolve(bAttributes).bind(bAttributes)
+
+  override def initialize(buffer: MutableRow): Unit = {
+    // TODO: We need to either force Aggregator to have a zero or we need to eliminate the need for
+    // this in execution.
+    buffer.setInt(mutableAggBufferOffset, aggregator.zero.asInstanceOf[Int])
+  }
+
+  override def update(buffer: MutableRow, input: InternalRow): Unit = {
+    val inputA = boundA.fromRow(input)
+    val currentB = boundB.fromRow(buffer)
+    val merged = aggregator.reduce(currentB, inputA)
+    val returned = boundB.toRow(merged)
+    buffer.setInt(mutableAggBufferOffset, returned.getInt(0))
+  }
+
+  override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
+    buffer1.setLong(
+      mutableAggBufferOffset,
+      buffer1.getLong(mutableAggBufferOffset) + buffer2.getLong(inputAggBufferOffset))
+  }
+
+  override def eval(buffer: InternalRow): Any = {
+    buffer.getInt(mutableAggBufferOffset)
+  }
+
+  override def toString: String = {
+    s"""${aggregator.getClass.getSimpleName}(${children.mkString(",")})"""
+  }
+
+  override def nodeName: String = aggregator.getClass.getSimpleName
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
new file mode 100644
index 000000000000..0b3192a6da9d
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -0,0 +1,81 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.expressions
+
+import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, AggregateExpression2}
+import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
+import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
+
+/**
+ * A base class for user-defined aggregations, which can be used in [[DataFrame]] and [[Dataset]]
+ * operations to take all of the elements of a group and reduce them to a single value.
+ *
+ * For example, the following aggregator extracts an `int` from a specific class and adds them up:
+ * {{{
+ *   case class Data(i: Int)
+ *
+ *   val customSummer =  new Aggregator[Data, Int, Int] {
+ *     def zero = 0
+ *     def reduce(b: Int, a: Data) = b + a.i
+ *     def present(r: Int) = r
+ *   }.toColumn()
+ *
+ *   val ds: Dataset[Data]
+ *   val aggregated = ds.select(customSummer)
+ * }}}
+ *
+ * Based loosely on Aggregator from Algebird: https://github.com/twitter/algebird
+ *
+ * @tparam A The input type for the aggregation.
+ * @tparam B The type of the intermediate value of the reduction.
+ * @tparam C The type of the final result.
+ */
+abstract class Aggregator[-A, B, C] {
+
+  /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
+  def zero: B
+
+  /**
+   * Combine two values to produce a new value.  For performance, the function may modify `b` and
+   * return it instead of constructing new object for b.
+   */
+  def reduce(b: B, a: A): B
+
+  /**
+   * Transform the output of the reduction.
+   */
+  def present(reduction: B): C
+
+  /**
+   * Returns this `Aggregator` as a [[TypedColumn]] that can be used in [[Dataset]] or [[DataFrame]]
+   * operations.
+   */
+  def toColumn(
+      implicit bEncoder: Encoder[B],
+      cEncoder: Encoder[C]): TypedColumn[A, C] = {
+    val expr =
+      new AggregateExpression2(
+        TypedAggregateExpression(this),
+        Complete,
+        false)
+
+    new TypedColumn[A, C](expr, encoderFor[C])
+  }
+}
+
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 3f0b24b68b81..6d56542ee087 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql
 
+
+
 import scala.language.implicitConversions
 import scala.reflect.runtime.universe.{TypeTag, typeTag}
 import scala.util.Try
@@ -24,11 +26,32 @@ import scala.util.Try
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.{SqlParser, ScalaReflection}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, Star}
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, Encoder}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical.BroadcastHint
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
 
+/**
+ * Ensures that java functions signatures for methods that now return a [[TypedColumn]] still have
+ * legacy equivalents in bytecode.  This compatibility is done by forcing the compiler to generate
+ * "bridge" methods due to the use of covariant return types.
+ *
+ * {{{
+ * In LegacyFunctions:
+ * public abstract org.apache.spark.sql.Column avg(java.lang.String);
+ *
+ * In functions:
+ * public static org.apache.spark.sql.TypedColumn<java.lang.Object, java.lang.Object> avg(...);
+ * }}}
+ *
+ * This allows us to use the same functions both in typed [[Dataset]] operations and untyped
+ * [[DataFrame]] operations when the return type for a given function is statically known.
+ */
+private[sql] abstract class LegacyFunctions {
+  def count(columnName: String): Column
+}
+
 /**
  * :: Experimental ::
  * Functions available for [[DataFrame]].
@@ -48,11 +71,14 @@ import org.apache.spark.util.Utils
  */
 @Experimental
 // scalastyle:off
-object functions {
+object functions extends LegacyFunctions {
 // scalastyle:on
 
   private def withExpr(expr: Expression): Column = Column(expr)
 
+  private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
+
+
   /**
    * Returns a [[Column]] based on the given column name.
    *
@@ -234,7 +260,7 @@ object functions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def count(columnName: String): Column = count(Column(columnName))
+  def count(columnName: String): TypedColumn[Any, Long] = count(Column(columnName)).as[Long]
 
   /**
    * Aggregate function: returns the number of distinct items in a group.
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 312cf33e4c2d..2da63d1b9670 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -258,8 +258,8 @@ public void testSelect() {
     Dataset<Integer> ds = context.createDataset(data, e.INT());
 
     Dataset<Tuple2<Integer, String>> selected = ds.select(
-      expr("value + 1").as(e.INT()),
-      col("value").cast("string").as(e.STRING()));
+      expr("value + 1"),
+      col("value").cast("string")).as(e.tuple(e.INT(), e.STRING()));
 
     Assert.assertEquals(
       Arrays.asList(tuple2(3, "2"), tuple2(7, "6")),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
new file mode 100644
index 000000000000..340470c096b8
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import org.apache.spark.sql.catalyst.encoders.Encoder
+import org.apache.spark.sql.functions._
+
+import scala.language.postfixOps
+
+import org.apache.spark.sql.test.SharedSQLContext
+
+import org.apache.spark.sql.expressions.Aggregator
+
+/** An `Aggregator` that adds up any numeric type returned by the given function. */
+class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializable {
+  val numeric = implicitly[Numeric[N]]
+
+  override def zero: N = numeric.zero
+
+  override def reduce(b: N, a: I): N = numeric.plus(b, f(a))
+
+  override def present(reduction: N): N = reduction
+}
+
+class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
+
+  import testImplicits._
+
+  def sum[I, N : Numeric : Encoder](f: I => N): TypedColumn[I, N] =
+    new SumOf(f).toColumn
+
+  test("typed aggregation: TypedAggregator") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(sum(_._2)),
+      ("a", 30), ("b", 3), ("c", 1))
+  }
+
+  test("typed aggregation: TypedAggregator, expr, expr") {
+    val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(
+        sum(_._2),
+        expr("sum(_2)").as[Int],
+        count("*")),
+      ("a", 30, 30, 2L), ("b", 3, 3, 2L), ("c", 1, 1, 1L))
+  }
+}

From 675c7e723cadff588405c23826a00686587728b8 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Mon, 9 Nov 2015 16:22:15 -0800
Subject: [PATCH 581/896] [SPARK-11564][SQL] Fix documentation for
 DataFrame.take/collect

Author: Reynold Xin <rxin@databricks.com>

Closes #9557 from rxin/SPARK-11564-1.
---
 .../src/main/scala/org/apache/spark/sql/DataFrame.scala   | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 8ab958adadcc..d25807cf8d09 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1479,8 +1479,8 @@ class DataFrame private[sql](
   /**
    * Returns the first `n` rows in the [[DataFrame]].
    *
-   * Running take requires moving data into the application's driver process, and doing so on a
-   * very large dataset can crash the driver process with OutOfMemoryError.
+   * Running take requires moving data into the application's driver process, and doing so with
+   * a very large `n` can crash the driver process with OutOfMemoryError.
    *
    * @group action
    * @since 1.3.0
@@ -1501,8 +1501,8 @@ class DataFrame private[sql](
   /**
    * Returns an array that contains all of [[Row]]s in this [[DataFrame]].
    *
-   * Running take requires moving data into the application's driver process, and doing so with
-   * a very large `n` can crash the driver process with OutOfMemoryError.
+   * Running collect requires moving all the data into the application's driver process, and
+   * doing so on a very large dataset can crash the driver process with OutOfMemoryError.
    *
    * For Java API, use [[collectAsList]].
    *

From 7dc9d8dba6c4bc655896b137062d896dec4ef64a Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Mon, 9 Nov 2015 16:25:29 -0800
Subject: [PATCH 582/896] [SPARK-11610][MLLIB][PYTHON][DOCS] Make the docs of
 LDAModel.describeTopics in Python more specific

cc jkbradley

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #9577 from yu-iskw/SPARK-11610.
---
 python/pyspark/mllib/clustering.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index 12081f8c6907..1fa061dc2da9 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -734,6 +734,12 @@ def describeTopics(self, maxTermsPerTopic=None):
         """Return the topics described by weighted terms.
 
         WARNING: If vocabSize and k are large, this can return a large object!
+
+        :param maxTermsPerTopic: Maximum number of terms to collect for each topic.
+            (default: vocabulary size)
+        :return: Array over topics. Each topic is represented as a pair of matching arrays:
+            (term indices, term weights in topic).
+            Each topic's terms are sorted in order of decreasing weight.
         """
         if maxTermsPerTopic is None:
             topics = self.call("describeTopics")

From 61f9c8711c79f35d67b0456155866da316b131d9 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Mon, 9 Nov 2015 16:55:23 -0800
Subject: [PATCH 583/896] [SPARK-11069][ML] Add RegexTokenizer option to
 convert to lowercase

jira: https://issues.apache.org/jira/browse/SPARK-11069
quotes from jira:
Tokenizer converts strings to lowercase automatically, but RegexTokenizer does not. It would be nice to add an option to RegexTokenizer to convert to lowercase. Proposal:
call the Boolean Param "toLowercase"
set default to false (so behavior does not change)

Actually sklearn converts to lowercase before tokenizing too

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #9092 from hhbyyh/tokenLower.
---
 .../apache/spark/ml/feature/Tokenizer.scala   | 19 ++++++++++++++--
 .../spark/ml/feature/JavaTokenizerSuite.java  |  1 +
 .../spark/ml/feature/TokenizerSuite.scala     | 22 ++++++++++++++-----
 3 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
index 248288ca73e9..1b82b40caac1 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
@@ -100,10 +100,25 @@ class RegexTokenizer(override val uid: String)
   /** @group getParam */
   def getPattern: String = $(pattern)
 
-  setDefault(minTokenLength -> 1, gaps -> true, pattern -> "\\s+")
+  /**
+   * Indicates whether to convert all characters to lowercase before tokenizing.
+   * Default: true
+   * @group param
+   */
+  final val toLowercase: BooleanParam = new BooleanParam(this, "toLowercase",
+    "whether to convert all characters to lowercase before tokenizing.")
+
+  /** @group setParam */
+  def setToLowercase(value: Boolean): this.type = set(toLowercase, value)
+
+  /** @group getParam */
+  def getToLowercase: Boolean = $(toLowercase)
+
+  setDefault(minTokenLength -> 1, gaps -> true, pattern -> "\\s+", toLowercase -> true)
 
-  override protected def createTransformFunc: String => Seq[String] = { str =>
+  override protected def createTransformFunc: String => Seq[String] = { originStr =>
     val re = $(pattern).r
+    val str = if ($(toLowercase)) originStr.toLowerCase() else originStr
     val tokens = if ($(gaps)) re.split(str).toSeq else re.findAllIn(str).toSeq
     val minLength = $(minTokenLength)
     tokens.filter(_.length >= minLength)
diff --git a/mllib/src/test/java/org/apache/spark/ml/feature/JavaTokenizerSuite.java b/mllib/src/test/java/org/apache/spark/ml/feature/JavaTokenizerSuite.java
index 02309ce63219..c407d98f1b79 100644
--- a/mllib/src/test/java/org/apache/spark/ml/feature/JavaTokenizerSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/feature/JavaTokenizerSuite.java
@@ -53,6 +53,7 @@ public void regexTokenizer() {
       .setOutputCol("tokens")
       .setPattern("\\s")
       .setGaps(true)
+      .setToLowercase(false)
       .setMinTokenLength(3);
 
 
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
index e5fd21c3f6fc..a02992a2407b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
@@ -48,13 +48,13 @@ class RegexTokenizerSuite extends SparkFunSuite with MLlibTestSparkContext {
       .setInputCol("rawText")
       .setOutputCol("tokens")
     val dataset0 = sqlContext.createDataFrame(Seq(
-      TokenizerTestData("Test for tokenization.", Array("Test", "for", "tokenization", ".")),
-      TokenizerTestData("Te,st. punct", Array("Te", ",", "st", ".", "punct"))
+      TokenizerTestData("Test for tokenization.", Array("test", "for", "tokenization", ".")),
+      TokenizerTestData("Te,st. punct", Array("te", ",", "st", ".", "punct"))
     ))
     testRegexTokenizer(tokenizer0, dataset0)
 
     val dataset1 = sqlContext.createDataFrame(Seq(
-      TokenizerTestData("Test for tokenization.", Array("Test", "for", "tokenization")),
+      TokenizerTestData("Test for tokenization.", Array("test", "for", "tokenization")),
       TokenizerTestData("Te,st. punct", Array("punct"))
     ))
     tokenizer0.setMinTokenLength(3)
@@ -64,11 +64,23 @@ class RegexTokenizerSuite extends SparkFunSuite with MLlibTestSparkContext {
       .setInputCol("rawText")
       .setOutputCol("tokens")
     val dataset2 = sqlContext.createDataFrame(Seq(
-      TokenizerTestData("Test for tokenization.", Array("Test", "for", "tokenization.")),
-      TokenizerTestData("Te,st.  punct", Array("Te,st.", "punct"))
+      TokenizerTestData("Test for tokenization.", Array("test", "for", "tokenization.")),
+      TokenizerTestData("Te,st.  punct", Array("te,st.", "punct"))
     ))
     testRegexTokenizer(tokenizer2, dataset2)
   }
+
+  test("RegexTokenizer with toLowercase false") {
+    val tokenizer = new RegexTokenizer()
+      .setInputCol("rawText")
+      .setOutputCol("tokens")
+      .setToLowercase(false)
+    val dataset = sqlContext.createDataFrame(Seq(
+      TokenizerTestData("JAVA SCALA", Array("JAVA", "SCALA")),
+      TokenizerTestData("java scala", Array("java", "scala"))
+    ))
+    testRegexTokenizer(tokenizer, dataset)
+  }
 }
 
 object RegexTokenizerSuite extends SparkFunSuite {

From 26062d22607e1f9854bc2588ba22a4e0f8bba48c Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Mon, 9 Nov 2015 17:18:49 -0800
Subject: [PATCH 584/896] [SPARK-11198][STREAMING][KINESIS] Support
 de-aggregation of records during recovery

While the KCL handles de-aggregation during the regular operation, during recovery we use the lower level api, and therefore need to de-aggregate the records.

tdas Testing is an issue, we need protobuf magic to do the aggregated records. Maybe we could depend on KPL for tests?

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9403 from brkyvz/kinesis-deaggregation.
---
 extras/kinesis-asl/pom.xml                    |  6 ++
 .../kinesis/KinesisBackedBlockRDD.scala       |  6 +-
 .../streaming/kinesis/KinesisReceiver.scala   |  1 -
 .../kinesis/KinesisRecordProcessor.scala      |  2 +-
 .../kinesis/KinesisBackedBlockRDDSuite.scala  | 12 +++-
 .../kinesis/KinesisStreamSuite.scala          | 17 +++---
 .../streaming/kinesis/KinesisTestUtils.scala  | 55 +++++++++++++++----
 pom.xml                                       |  2 +
 8 files changed, 76 insertions(+), 25 deletions(-)
 rename extras/kinesis-asl/src/{main => test}/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala (80%)

diff --git a/extras/kinesis-asl/pom.xml b/extras/kinesis-asl/pom.xml
index ef72d97eae69..519a920279c9 100644
--- a/extras/kinesis-asl/pom.xml
+++ b/extras/kinesis-asl/pom.xml
@@ -64,6 +64,12 @@
       <artifactId>aws-java-sdk</artifactId>
       <version>${aws.java.sdk.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.amazonaws</groupId>
+      <artifactId>amazon-kinesis-producer</artifactId>
+      <version>${aws.kinesis.producer.version}</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
index 000897a4e729..691c1790b207 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDD.scala
@@ -23,6 +23,7 @@ import scala.util.control.NonFatal
 
 import com.amazonaws.auth.{AWSCredentials, DefaultAWSCredentialsProviderChain}
 import com.amazonaws.services.kinesis.AmazonKinesisClient
+import com.amazonaws.services.kinesis.clientlibrary.types.UserRecord
 import com.amazonaws.services.kinesis.model._
 
 import org.apache.spark._
@@ -210,7 +211,10 @@ class KinesisSequenceRangeIterator(
       s"getting records using shard iterator") {
         client.getRecords(getRecordsRequest)
       }
-    (getRecordsResult.getRecords.iterator().asScala, getRecordsResult.getNextShardIterator)
+    // De-aggregate records, if KPL was used in producing the records. The KCL automatically
+    // handles de-aggregation during regular operation. This code path is used during recovery
+    val recordIterator = UserRecord.deaggregate(getRecordsResult.getRecords)
+    (recordIterator.iterator().asScala, getRecordsResult.getNextShardIterator)
   }
 
   /**
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
index 50993f157cd9..97dbb918573a 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisReceiver.scala
@@ -216,7 +216,6 @@ private[kinesis] class KinesisReceiver[T](
       val metadata = SequenceNumberRange(streamName, shardId,
         records.get(0).getSequenceNumber(), records.get(records.size() - 1).getSequenceNumber())
       blockGenerator.addMultipleDataWithCallback(dataIterator, metadata)
-
     }
   }
 
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
index e381ffa0cbef..b5b76cb92d86 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
+++ b/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisRecordProcessor.scala
@@ -80,7 +80,7 @@ private[kinesis] class KinesisRecordProcessor[T](receiver: KinesisReceiver[T], w
            *     more than once.
            */
           logError(s"Exception:  WorkerId $workerId encountered and exception while storing " +
-              " or checkpointing a batch for workerId $workerId and shardId $shardId.", e)
+              s" or checkpointing a batch for workerId $workerId and shardId $shardId.", e)
 
           /* Rethrow the exception to the Kinesis Worker that is managing this RecordProcessor. */
           throw e
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
index 9f9e146a08d4..52c61dfb1c02 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisBackedBlockRDDSuite.scala
@@ -22,7 +22,8 @@ import org.scalatest.BeforeAndAfterAll
 import org.apache.spark.storage.{BlockId, BlockManager, StorageLevel, StreamBlockId}
 import org.apache.spark.{SparkConf, SparkContext, SparkException}
 
-class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll {
+abstract class KinesisBackedBlockRDDTests(aggregateTestData: Boolean)
+  extends KinesisFunSuite with BeforeAndAfterAll {
 
   private val testData = 1 to 8
 
@@ -37,13 +38,12 @@ class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll
   private var sc: SparkContext = null
   private var blockManager: BlockManager = null
 
-
   override def beforeAll(): Unit = {
     runIfTestsEnabled("Prepare KinesisTestUtils") {
       testUtils = new KinesisTestUtils()
       testUtils.createStream()
 
-      shardIdToDataAndSeqNumbers = testUtils.pushData(testData)
+      shardIdToDataAndSeqNumbers = testUtils.pushData(testData, aggregate = aggregateTestData)
       require(shardIdToDataAndSeqNumbers.size > 1, "Need data to be sent to multiple shards")
 
       shardIds = shardIdToDataAndSeqNumbers.keySet.toSeq
@@ -247,3 +247,9 @@ class KinesisBackedBlockRDDSuite extends KinesisFunSuite with BeforeAndAfterAll
     Array.tabulate(num) { i => new StreamBlockId(0, i) }
   }
 }
+
+class WithAggregationKinesisBackedBlockRDDSuite
+  extends KinesisBackedBlockRDDTests(aggregateTestData = true)
+
+class WithoutAggregationKinesisBackedBlockRDDSuite
+  extends KinesisBackedBlockRDDTests(aggregateTestData = false)
diff --git a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
index ba84e557dfcc..dee30444d8cc 100644
--- a/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisStreamSuite.scala
@@ -39,7 +39,7 @@ import org.apache.spark.streaming.scheduler.ReceivedBlockInfo
 import org.apache.spark.util.Utils
 import org.apache.spark.{SparkConf, SparkContext}
 
-class KinesisStreamSuite extends KinesisFunSuite
+abstract class KinesisStreamTests(aggregateTestData: Boolean) extends KinesisFunSuite
   with Eventually with BeforeAndAfter with BeforeAndAfterAll {
 
   // This is the name that KCL will use to save metadata to DynamoDB
@@ -182,13 +182,13 @@ class KinesisStreamSuite extends KinesisFunSuite
     val collected = new mutable.HashSet[Int] with mutable.SynchronizedSet[Int]
     stream.map { bytes => new String(bytes).toInt }.foreachRDD { rdd =>
       collected ++= rdd.collect()
-      logInfo("Collected = " + rdd.collect().toSeq.mkString(", "))
+      logInfo("Collected = " + collected.mkString(", "))
     }
     ssc.start()
 
     val testData = 1 to 10
     eventually(timeout(120 seconds), interval(10 second)) {
-      testUtils.pushData(testData)
+      testUtils.pushData(testData, aggregateTestData)
       assert(collected === testData.toSet, "\nData received does not match data sent")
     }
     ssc.stop(stopSparkContext = false)
@@ -207,13 +207,13 @@ class KinesisStreamSuite extends KinesisFunSuite
     val collected = new mutable.HashSet[Int] with mutable.SynchronizedSet[Int]
     stream.foreachRDD { rdd =>
       collected ++= rdd.collect()
-      logInfo("Collected = " + rdd.collect().toSeq.mkString(", "))
+      logInfo("Collected = " + collected.mkString(", "))
     }
     ssc.start()
 
     val testData = 1 to 10
     eventually(timeout(120 seconds), interval(10 second)) {
-      testUtils.pushData(testData)
+      testUtils.pushData(testData, aggregateTestData)
       val modData = testData.map(_ + 5)
       assert(collected === modData.toSet, "\nData received does not match data sent")
     }
@@ -254,7 +254,7 @@ class KinesisStreamSuite extends KinesisFunSuite
     // If this times out because numBatchesWithData is empty, then its likely that foreachRDD
     // function failed with exceptions, and nothing got added to `collectedData`
     eventually(timeout(2 minutes), interval(1 seconds)) {
-      testUtils.pushData(1 to 5)
+      testUtils.pushData(1 to 5, aggregateTestData)
       assert(isCheckpointPresent && numBatchesWithData > 10)
     }
     ssc.stop(stopSparkContext = true)  // stop the SparkContext so that the blocks are not reused
@@ -285,5 +285,8 @@ class KinesisStreamSuite extends KinesisFunSuite
     }
     ssc.stop()
   }
-
 }
+
+class WithAggregationKinesisStreamSuite extends KinesisStreamTests(aggregateTestData = true)
+
+class WithoutAggregationKinesisStreamSuite extends KinesisStreamTests(aggregateTestData = false)
diff --git a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala
similarity index 80%
rename from extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala
rename to extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala
index 634bf9452107..7487aa1c1263 100644
--- a/extras/kinesis-asl/src/main/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala
+++ b/extras/kinesis-asl/src/test/scala/org/apache/spark/streaming/kinesis/KinesisTestUtils.scala
@@ -31,6 +31,8 @@ import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient
 import com.amazonaws.services.dynamodbv2.document.DynamoDB
 import com.amazonaws.services.kinesis.AmazonKinesisClient
 import com.amazonaws.services.kinesis.model._
+import com.amazonaws.services.kinesis.producer.{KinesisProducer, KinesisProducerConfiguration, UserRecordResult}
+import com.google.common.util.concurrent.{FutureCallback, Futures}
 
 import org.apache.spark.Logging
 
@@ -64,6 +66,16 @@ private[kinesis] class KinesisTestUtils extends Logging {
     new DynamoDB(dynamoDBClient)
   }
 
+  private lazy val kinesisProducer: KinesisProducer = {
+    val conf = new KinesisProducerConfiguration()
+      .setRecordMaxBufferedTime(1000)
+      .setMaxConnections(1)
+      .setRegion(regionName)
+      .setMetricsLevel("none")
+
+    new KinesisProducer(conf)
+  }
+
   def streamName: String = {
     require(streamCreated, "Stream not yet created, call createStream() to create one")
     _streamName
@@ -90,22 +102,41 @@ private[kinesis] class KinesisTestUtils extends Logging {
    * Push data to Kinesis stream and return a map of
    * shardId -> seq of (data, seq number) pushed to corresponding shard
    */
-  def pushData(testData: Seq[Int]): Map[String, Seq[(Int, String)]] = {
+  def pushData(testData: Seq[Int], aggregate: Boolean): Map[String, Seq[(Int, String)]] = {
     require(streamCreated, "Stream not yet created, call createStream() to create one")
     val shardIdToSeqNumbers = new mutable.HashMap[String, ArrayBuffer[(Int, String)]]()
 
     testData.foreach { num =>
       val str = num.toString
-      val putRecordRequest = new PutRecordRequest().withStreamName(streamName)
-        .withData(ByteBuffer.wrap(str.getBytes()))
-        .withPartitionKey(str)
-
-      val putRecordResult = kinesisClient.putRecord(putRecordRequest)
-      val shardId = putRecordResult.getShardId
-      val seqNumber = putRecordResult.getSequenceNumber()
-      val sentSeqNumbers = shardIdToSeqNumbers.getOrElseUpdate(shardId,
-        new ArrayBuffer[(Int, String)]())
-      sentSeqNumbers += ((num, seqNumber))
+      val data = ByteBuffer.wrap(str.getBytes())
+      if (aggregate) {
+        val future = kinesisProducer.addUserRecord(streamName, str, data)
+        val kinesisCallBack = new FutureCallback[UserRecordResult]() {
+          override def onFailure(t: Throwable): Unit = {} // do nothing
+
+          override def onSuccess(result: UserRecordResult): Unit = {
+            val shardId = result.getShardId
+            val seqNumber = result.getSequenceNumber()
+            val sentSeqNumbers = shardIdToSeqNumbers.getOrElseUpdate(shardId,
+              new ArrayBuffer[(Int, String)]())
+            sentSeqNumbers += ((num, seqNumber))
+          }
+        }
+
+        Futures.addCallback(future, kinesisCallBack)
+        kinesisProducer.flushSync() // make sure we send all data before returning the map
+      } else {
+        val putRecordRequest = new PutRecordRequest().withStreamName(streamName)
+          .withData(data)
+          .withPartitionKey(str)
+
+        val putRecordResult = kinesisClient.putRecord(putRecordRequest)
+        val shardId = putRecordResult.getShardId
+        val seqNumber = putRecordResult.getSequenceNumber()
+        val sentSeqNumbers = shardIdToSeqNumbers.getOrElseUpdate(shardId,
+          new ArrayBuffer[(Int, String)]())
+        sentSeqNumbers += ((num, seqNumber))
+      }
     }
 
     logInfo(s"Pushed $testData:\n\t ${shardIdToSeqNumbers.mkString("\n\t")}")
@@ -116,7 +147,7 @@ private[kinesis] class KinesisTestUtils extends Logging {
    * Expose a Python friendly API.
    */
   def pushData(testData: java.util.List[Int]): Unit = {
-    pushData(testData.asScala)
+    pushData(testData.asScala, aggregate = false)
   }
 
   def deleteStream(): Unit = {
diff --git a/pom.xml b/pom.xml
index 4ed1c0c82dee..fd8c77351388 100644
--- a/pom.xml
+++ b/pom.xml
@@ -154,6 +154,8 @@
     <jets3t.version>0.7.1</jets3t.version>
     <aws.java.sdk.version>1.9.40</aws.java.sdk.version>
     <aws.kinesis.client.version>1.4.0</aws.kinesis.client.version>
+    <!-- the producer is used in tests -->
+    <aws.kinesis.producer.version>0.10.1</aws.kinesis.producer.version>
     <!--  org.apache.httpcomponents/httpclient-->
     <commons.httpclient.version>4.3.2</commons.httpclient.version>
     <!--  commons-httpclient/commons-httpclient-->

From 0ce6f9b2d203ce67aeb4d3aedf19bbd997fe01b9 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Mon, 9 Nov 2015 17:35:12 -0800
Subject: [PATCH 585/896] [SPARK-11141][STREAMING] Batch
 ReceivedBlockTrackerLogEvents for WAL writes

When using S3 as a directory for WALs, the writes take too long. The driver gets very easily bottlenecked when multiple receivers send AddBlock events to the ReceiverTracker. This PR adds batching of events in the ReceivedBlockTracker so that receivers don't get blocked by the driver for too long.

cc zsxwing tdas

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9143 from brkyvz/batch-wal-writes.
---
 .../scheduler/ReceivedBlockTracker.scala      |  62 ++-
 .../streaming/scheduler/ReceiverTracker.scala |  25 +-
 .../streaming/util/BatchedWriteAheadLog.scala | 223 ++++++++
 .../streaming/util/WriteAheadLogUtils.scala   |  21 +-
 .../streaming/util/WriteAheadLogSuite.scala   | 506 ++++++++++++------
 .../util/WriteAheadLogUtilsSuite.scala        | 122 +++++
 6 files changed, 767 insertions(+), 192 deletions(-)
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
 create mode 100644 streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceivedBlockTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceivedBlockTracker.scala
index f2711d1355e6..500dc70c9850 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceivedBlockTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceivedBlockTracker.scala
@@ -22,12 +22,13 @@ import java.nio.ByteBuffer
 import scala.collection.JavaConverters._
 import scala.collection.mutable
 import scala.language.implicitConversions
+import scala.util.control.NonFatal
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.streaming.Time
-import org.apache.spark.streaming.util.{WriteAheadLog, WriteAheadLogUtils}
+import org.apache.spark.streaming.util.{BatchedWriteAheadLog, WriteAheadLog, WriteAheadLogUtils}
 import org.apache.spark.util.{Clock, Utils}
 import org.apache.spark.{Logging, SparkConf}
 
@@ -41,7 +42,6 @@ private[streaming] case class BatchAllocationEvent(time: Time, allocatedBlocks:
 private[streaming] case class BatchCleanupEvent(times: Seq[Time])
   extends ReceivedBlockTrackerLogEvent
 
-
 /** Class representing the blocks of all the streams allocated to a batch */
 private[streaming]
 case class AllocatedBlocks(streamIdToAllocatedBlocks: Map[Int, Seq[ReceivedBlockInfo]]) {
@@ -82,15 +82,22 @@ private[streaming] class ReceivedBlockTracker(
   }
 
   /** Add received block. This event will get written to the write ahead log (if enabled). */
-  def addBlock(receivedBlockInfo: ReceivedBlockInfo): Boolean = synchronized {
+  def addBlock(receivedBlockInfo: ReceivedBlockInfo): Boolean = {
     try {
-      writeToLog(BlockAdditionEvent(receivedBlockInfo))
-      getReceivedBlockQueue(receivedBlockInfo.streamId) += receivedBlockInfo
-      logDebug(s"Stream ${receivedBlockInfo.streamId} received " +
-        s"block ${receivedBlockInfo.blockStoreResult.blockId}")
-      true
+      val writeResult = writeToLog(BlockAdditionEvent(receivedBlockInfo))
+      if (writeResult) {
+        synchronized {
+          getReceivedBlockQueue(receivedBlockInfo.streamId) += receivedBlockInfo
+        }
+        logDebug(s"Stream ${receivedBlockInfo.streamId} received " +
+          s"block ${receivedBlockInfo.blockStoreResult.blockId}")
+      } else {
+        logDebug(s"Failed to acknowledge stream ${receivedBlockInfo.streamId} receiving " +
+          s"block ${receivedBlockInfo.blockStoreResult.blockId} in the Write Ahead Log.")
+      }
+      writeResult
     } catch {
-      case e: Exception =>
+      case NonFatal(e) =>
         logError(s"Error adding block $receivedBlockInfo", e)
         false
     }
@@ -106,10 +113,12 @@ private[streaming] class ReceivedBlockTracker(
           (streamId, getReceivedBlockQueue(streamId).dequeueAll(x => true))
       }.toMap
       val allocatedBlocks = AllocatedBlocks(streamIdToBlocks)
-      writeToLog(BatchAllocationEvent(batchTime, allocatedBlocks))
-      timeToAllocatedBlocks(batchTime) = allocatedBlocks
-      lastAllocatedBatchTime = batchTime
-      allocatedBlocks
+      if (writeToLog(BatchAllocationEvent(batchTime, allocatedBlocks))) {
+        timeToAllocatedBlocks.put(batchTime, allocatedBlocks)
+        lastAllocatedBatchTime = batchTime
+      } else {
+        logInfo(s"Possibly processed batch $batchTime need to be processed again in WAL recovery")
+      }
     } else {
       // This situation occurs when:
       // 1. WAL is ended with BatchAllocationEvent, but without BatchCleanupEvent,
@@ -157,9 +166,12 @@ private[streaming] class ReceivedBlockTracker(
     require(cleanupThreshTime.milliseconds < clock.getTimeMillis())
     val timesToCleanup = timeToAllocatedBlocks.keys.filter { _ < cleanupThreshTime }.toSeq
     logInfo("Deleting batches " + timesToCleanup)
-    writeToLog(BatchCleanupEvent(timesToCleanup))
-    timeToAllocatedBlocks --= timesToCleanup
-    writeAheadLogOption.foreach(_.clean(cleanupThreshTime.milliseconds, waitForCompletion))
+    if (writeToLog(BatchCleanupEvent(timesToCleanup))) {
+      timeToAllocatedBlocks --= timesToCleanup
+      writeAheadLogOption.foreach(_.clean(cleanupThreshTime.milliseconds, waitForCompletion))
+    } else {
+      logWarning("Failed to acknowledge batch clean up in the Write Ahead Log.")
+    }
   }
 
   /** Stop the block tracker. */
@@ -185,8 +197,8 @@ private[streaming] class ReceivedBlockTracker(
       logTrace(s"Recovery: Inserting allocated batch for time $batchTime to " +
         s"${allocatedBlocks.streamIdToAllocatedBlocks}")
       streamIdToUnallocatedBlockQueues.values.foreach { _.clear() }
-      lastAllocatedBatchTime = batchTime
       timeToAllocatedBlocks.put(batchTime, allocatedBlocks)
+      lastAllocatedBatchTime = batchTime
     }
 
     // Cleanup the batch allocations
@@ -213,12 +225,20 @@ private[streaming] class ReceivedBlockTracker(
   }
 
   /** Write an update to the tracker to the write ahead log */
-  private def writeToLog(record: ReceivedBlockTrackerLogEvent) {
+  private def writeToLog(record: ReceivedBlockTrackerLogEvent): Boolean = {
     if (isWriteAheadLogEnabled) {
-      logDebug(s"Writing to log $record")
-      writeAheadLogOption.foreach { logManager =>
-        logManager.write(ByteBuffer.wrap(Utils.serialize(record)), clock.getTimeMillis())
+      logTrace(s"Writing record: $record")
+      try {
+        writeAheadLogOption.get.write(ByteBuffer.wrap(Utils.serialize(record)),
+          clock.getTimeMillis())
+        true
+      } catch {
+        case NonFatal(e) =>
+          logWarning(s"Exception thrown while writing record: $record to the WriteAheadLog.", e)
+          false
       }
+    } else {
+      true
     }
   }
 
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
index b183d856f50c..ea5d12b50fcc 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTracker.scala
@@ -20,7 +20,7 @@ package org.apache.spark.streaming.scheduler
 import java.util.concurrent.{CountDownLatch, TimeUnit}
 
 import scala.collection.mutable.HashMap
-import scala.concurrent.ExecutionContext
+import scala.concurrent.{Future, ExecutionContext}
 import scala.language.existentials
 import scala.util.{Failure, Success}
 
@@ -437,7 +437,12 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
 
     // TODO Remove this thread pool after https://github.com/apache/spark/issues/7385 is merged
     private val submitJobThreadPool = ExecutionContext.fromExecutorService(
-      ThreadUtils.newDaemonCachedThreadPool("submit-job-thead-pool"))
+      ThreadUtils.newDaemonCachedThreadPool("submit-job-thread-pool"))
+
+    private val walBatchingThreadPool = ExecutionContext.fromExecutorService(
+      ThreadUtils.newDaemonCachedThreadPool("wal-batching-thread-pool"))
+
+    @volatile private var active: Boolean = true
 
     override def receive: PartialFunction[Any, Unit] = {
       // Local messages
@@ -488,7 +493,19 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
           registerReceiver(streamId, typ, host, executorId, receiverEndpoint, context.senderAddress)
         context.reply(successful)
       case AddBlock(receivedBlockInfo) =>
-        context.reply(addBlock(receivedBlockInfo))
+        if (WriteAheadLogUtils.isBatchingEnabled(ssc.conf, isDriver = true)) {
+          walBatchingThreadPool.execute(new Runnable {
+            override def run(): Unit = Utils.tryLogNonFatalError {
+              if (active) {
+                context.reply(addBlock(receivedBlockInfo))
+              } else {
+                throw new IllegalStateException("ReceiverTracker RpcEndpoint shut down.")
+              }
+            }
+          })
+        } else {
+          context.reply(addBlock(receivedBlockInfo))
+        }
       case DeregisterReceiver(streamId, message, error) =>
         deregisterReceiver(streamId, message, error)
         context.reply(true)
@@ -599,6 +616,8 @@ class ReceiverTracker(ssc: StreamingContext, skipReceiverLaunch: Boolean = false
 
     override def onStop(): Unit = {
       submitJobThreadPool.shutdownNow()
+      active = false
+      walBatchingThreadPool.shutdown()
     }
 
     /**
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
new file mode 100644
index 000000000000..9727ed2ba144
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
@@ -0,0 +1,223 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.util
+
+import java.nio.ByteBuffer
+import java.util.concurrent.LinkedBlockingQueue
+import java.util.{Iterator => JIterator}
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable.ArrayBuffer
+import scala.concurrent.{Await, Promise}
+import scala.concurrent.duration._
+import scala.util.control.NonFatal
+
+import org.apache.spark.{Logging, SparkConf}
+import org.apache.spark.util.Utils
+
+/**
+ * A wrapper for a WriteAheadLog that batches records before writing data. Handles aggregation
+ * during writes, and de-aggregation in the `readAll` method. The end consumer has to handle
+ * de-aggregation after the `read` method. In addition, the `WriteAheadLogRecordHandle` returned
+ * after the write will contain the batch of records rather than individual records.
+ *
+ * When writing a batch of records, the `time` passed to the `wrappedLog` will be the timestamp
+ * of the latest record in the batch. This is very important in achieving correctness. Consider the
+ * following example:
+ * We receive records with timestamps 1, 3, 5, 7. We use "log-1" as the filename. Once we receive
+ * a clean up request for timestamp 3, we would clean up the file "log-1", and lose data regarding
+ * 5 and 7.
+ *
+ * This means the caller can assume the same write semantics as any other WriteAheadLog
+ * implementation despite the batching in the background - when the write() returns, the data is
+ * written to the WAL and is durable. To take advantage of the batching, the caller can write from
+ * multiple threads, each of which will stay blocked until the corresponding data has been written.
+ *
+ * All other methods of the WriteAheadLog interface will be passed on to the wrapped WriteAheadLog.
+ */
+private[util] class BatchedWriteAheadLog(val wrappedLog: WriteAheadLog, conf: SparkConf)
+  extends WriteAheadLog with Logging {
+
+  import BatchedWriteAheadLog._
+
+  private val walWriteQueue = new LinkedBlockingQueue[Record]()
+
+  // Whether the writer thread is active
+  @volatile private var active: Boolean = true
+  private val buffer = new ArrayBuffer[Record]()
+
+  private val batchedWriterThread = startBatchedWriterThread()
+
+  /**
+   * Write a byte buffer to the log file. This method adds the byteBuffer to a queue and blocks
+   * until the record is properly written by the parent.
+   */
+  override def write(byteBuffer: ByteBuffer, time: Long): WriteAheadLogRecordHandle = {
+    val promise = Promise[WriteAheadLogRecordHandle]()
+    val putSuccessfully = synchronized {
+      if (active) {
+        walWriteQueue.offer(Record(byteBuffer, time, promise))
+        true
+      } else {
+        false
+      }
+    }
+    if (putSuccessfully) {
+      Await.result(promise.future, WriteAheadLogUtils.getBatchingTimeout(conf).milliseconds)
+    } else {
+      throw new IllegalStateException("close() was called on BatchedWriteAheadLog before " +
+        s"write request with time $time could be fulfilled.")
+    }
+  }
+
+  /**
+   * This method is not supported as the resulting ByteBuffer would actually require de-aggregation.
+   * This method is primarily used in testing, and to ensure that it is not used in production,
+   * we throw an UnsupportedOperationException.
+   */
+  override def read(segment: WriteAheadLogRecordHandle): ByteBuffer = {
+    throw new UnsupportedOperationException("read() is not supported for BatchedWriteAheadLog " +
+      "as the data may require de-aggregation.")
+  }
+
+  /**
+   * Read all the existing logs from the log directory. The output of the wrapped WriteAheadLog
+   * will be de-aggregated.
+   */
+  override def readAll(): JIterator[ByteBuffer] = {
+    wrappedLog.readAll().asScala.flatMap(deaggregate).asJava
+  }
+
+  /**
+   * Delete the log files that are older than the threshold time.
+   *
+   * This method is handled by the parent WriteAheadLog.
+   */
+  override def clean(threshTime: Long, waitForCompletion: Boolean): Unit = {
+    wrappedLog.clean(threshTime, waitForCompletion)
+  }
+
+
+  /**
+   * Stop the batched writer thread, fulfill promises with failures and close the wrapped WAL.
+   */
+  override def close(): Unit = {
+    logInfo(s"BatchedWriteAheadLog shutting down at time: ${System.currentTimeMillis()}.")
+    synchronized {
+      active = false
+    }
+    batchedWriterThread.interrupt()
+    batchedWriterThread.join()
+    while (!walWriteQueue.isEmpty) {
+      val Record(_, time, promise) = walWriteQueue.poll()
+      promise.failure(new IllegalStateException("close() was called on BatchedWriteAheadLog " +
+        s"before write request with time $time could be fulfilled."))
+    }
+    wrappedLog.close()
+  }
+
+  /** Start the actual log writer on a separate thread. */
+  private def startBatchedWriterThread(): Thread = {
+    val thread = new Thread(new Runnable {
+      override def run(): Unit = {
+        while (active) {
+          try {
+            flushRecords()
+          } catch {
+            case NonFatal(e) =>
+              logWarning("Encountered exception in Batched Writer Thread.", e)
+          }
+        }
+        logInfo("BatchedWriteAheadLog Writer thread exiting.")
+      }
+    }, "BatchedWriteAheadLog Writer")
+    thread.setDaemon(true)
+    thread.start()
+    thread
+  }
+
+  /** Write all the records in the buffer to the write ahead log. */
+  private def flushRecords(): Unit = {
+    try {
+      buffer.append(walWriteQueue.take())
+      val numBatched = walWriteQueue.drainTo(buffer.asJava) + 1
+      logDebug(s"Received $numBatched records from queue")
+    } catch {
+      case _: InterruptedException =>
+        logWarning("BatchedWriteAheadLog Writer queue interrupted.")
+    }
+    try {
+      var segment: WriteAheadLogRecordHandle = null
+      if (buffer.length > 0) {
+        logDebug(s"Batched ${buffer.length} records for Write Ahead Log write")
+        // We take the latest record for the timestamp. Please refer to the class Javadoc for
+        // detailed explanation
+        val time = buffer.last.time
+        segment = wrappedLog.write(aggregate(buffer), time)
+      }
+      buffer.foreach(_.promise.success(segment))
+    } catch {
+      case e: InterruptedException =>
+        logWarning("BatchedWriteAheadLog Writer queue interrupted.", e)
+        buffer.foreach(_.promise.failure(e))
+      case NonFatal(e) =>
+        logWarning(s"BatchedWriteAheadLog Writer failed to write $buffer", e)
+        buffer.foreach(_.promise.failure(e))
+    } finally {
+      buffer.clear()
+    }
+  }
+}
+
+/** Static methods for aggregating and de-aggregating records. */
+private[util] object BatchedWriteAheadLog {
+
+  /**
+   * Wrapper class for representing the records that we will write to the WriteAheadLog. Coupled
+   * with the timestamp for the write request of the record, and the promise that will block the
+   * write request, while a separate thread is actually performing the write.
+   */
+  case class Record(data: ByteBuffer, time: Long, promise: Promise[WriteAheadLogRecordHandle])
+
+  /** Copies the byte array of a ByteBuffer. */
+  private def getByteArray(buffer: ByteBuffer): Array[Byte] = {
+    val byteArray = new Array[Byte](buffer.remaining())
+    buffer.get(byteArray)
+    byteArray
+  }
+
+  /** Aggregate multiple serialized ReceivedBlockTrackerLogEvents in a single ByteBuffer. */
+  def aggregate(records: Seq[Record]): ByteBuffer = {
+    ByteBuffer.wrap(Utils.serialize[Array[Array[Byte]]](
+      records.map(record => getByteArray(record.data)).toArray))
+  }
+
+  /**
+   * De-aggregate serialized ReceivedBlockTrackerLogEvents in a single ByteBuffer.
+   * A stream may not have used batching initially, but started using it after a restart. This
+   * method therefore needs to be backwards compatible.
+   */
+  def deaggregate(buffer: ByteBuffer): Array[ByteBuffer] = {
+    try {
+      Utils.deserialize[Array[Array[Byte]]](getByteArray(buffer)).map(ByteBuffer.wrap)
+    } catch {
+      case _: ClassCastException => // users may restart a stream with batching enabled
+        Array(buffer)
+    }
+  }
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
index 0ea970e61b69..731a369fc92c 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
@@ -38,6 +38,8 @@ private[streaming] object WriteAheadLogUtils extends Logging {
   val DRIVER_WAL_ROLLING_INTERVAL_CONF_KEY =
     "spark.streaming.driver.writeAheadLog.rollingIntervalSecs"
   val DRIVER_WAL_MAX_FAILURES_CONF_KEY = "spark.streaming.driver.writeAheadLog.maxFailures"
+  val DRIVER_WAL_BATCHING_CONF_KEY = "spark.streaming.driver.writeAheadLog.allowBatching"
+  val DRIVER_WAL_BATCHING_TIMEOUT_CONF_KEY = "spark.streaming.driver.writeAheadLog.batchingTimeout"
   val DRIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY =
     "spark.streaming.driver.writeAheadLog.closeFileAfterWrite"
 
@@ -64,6 +66,18 @@ private[streaming] object WriteAheadLogUtils extends Logging {
     }
   }
 
+  def isBatchingEnabled(conf: SparkConf, isDriver: Boolean): Boolean = {
+    isDriver && conf.getBoolean(DRIVER_WAL_BATCHING_CONF_KEY, defaultValue = false)
+  }
+
+  /**
+   * How long we will wait for the wrappedLog in the BatchedWriteAheadLog to write the records
+   * before we fail the write attempt to unblock receivers.
+   */
+  def getBatchingTimeout(conf: SparkConf): Long = {
+    conf.getLong(DRIVER_WAL_BATCHING_TIMEOUT_CONF_KEY, defaultValue = 5000)
+  }
+
   def shouldCloseFileAfterWrite(conf: SparkConf, isDriver: Boolean): Boolean = {
     if (isDriver) {
       conf.getBoolean(DRIVER_WAL_CLOSE_AFTER_WRITE_CONF_KEY, defaultValue = false)
@@ -115,7 +129,7 @@ private[streaming] object WriteAheadLogUtils extends Logging {
     } else {
       sparkConf.getOption(RECEIVER_WAL_CLASS_CONF_KEY)
     }
-    classNameOption.map { className =>
+    val wal = classNameOption.map { className =>
       try {
         instantiateClass(
           Utils.classForName(className).asInstanceOf[Class[_ <: WriteAheadLog]], sparkConf)
@@ -128,6 +142,11 @@ private[streaming] object WriteAheadLogUtils extends Logging {
         getRollingIntervalSecs(sparkConf, isDriver), getMaxFailures(sparkConf, isDriver),
         shouldCloseFileAfterWrite(sparkConf, isDriver))
     }
+    if (isBatchingEnabled(sparkConf, isDriver)) {
+      new BatchedWriteAheadLog(wal, sparkConf)
+    } else {
+      wal
+    }
   }
 
   /** Instantiate the class, either using single arg constructor or zero arg constructor */
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index 93ae41a3d2ec..e96f4c2a2934 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -18,31 +18,47 @@ package org.apache.spark.streaming.util
 
 import java.io._
 import java.nio.ByteBuffer
-import java.util
+import java.util.concurrent.{ExecutionException, ThreadPoolExecutor}
+import java.util.concurrent.atomic.AtomicInteger
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
+import scala.concurrent._
 import scala.concurrent.duration._
 import scala.language.{implicitConversions, postfixOps}
-import scala.reflect.ClassTag
+import scala.util.{Failure, Success}
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
+import org.mockito.Matchers.{eq => meq}
+import org.mockito.Matchers._
+import org.mockito.Mockito._
+import org.mockito.invocation.InvocationOnMock
+import org.mockito.stubbing.Answer
+import org.scalatest.concurrent.Eventually
 import org.scalatest.concurrent.Eventually._
-import org.scalatest.BeforeAndAfter
+import org.scalatest.{BeforeAndAfterEach, BeforeAndAfter}
+import org.scalatest.mock.MockitoSugar
 
-import org.apache.spark.util.{ManualClock, Utils}
-import org.apache.spark.{SparkConf, SparkException, SparkFunSuite}
+import org.apache.spark.streaming.scheduler._
+import org.apache.spark.util.{ThreadUtils, ManualClock, Utils}
+import org.apache.spark.{SparkException, SparkConf, SparkFunSuite}
 
-class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
+/** Common tests for WriteAheadLogs that we would like to test with different configurations. */
+abstract class CommonWriteAheadLogTests(
+    allowBatching: Boolean,
+    closeFileAfterWrite: Boolean,
+    testTag: String = "")
+  extends SparkFunSuite with BeforeAndAfter {
 
   import WriteAheadLogSuite._
 
-  val hadoopConf = new Configuration()
-  var tempDir: File = null
-  var testDir: String = null
-  var testFile: String = null
-  var writeAheadLog: FileBasedWriteAheadLog = null
+  protected val hadoopConf = new Configuration()
+  protected var tempDir: File = null
+  protected var testDir: String = null
+  protected var testFile: String = null
+  protected var writeAheadLog: WriteAheadLog = null
+  protected def testPrefix = if (testTag != "") testTag + " - " else testTag
 
   before {
     tempDir = Utils.createTempDir()
@@ -58,49 +74,130 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
     Utils.deleteRecursively(tempDir)
   }
 
-  test("WriteAheadLogUtils - log selection and creation") {
-    val logDir = Utils.createTempDir().getAbsolutePath()
+  test(testPrefix + "read all logs") {
+    // Write data manually for testing reading through WriteAheadLog
+    val writtenData = (1 to 10).map { i =>
+      val data = generateRandomData()
+      val file = testDir + s"/log-$i-$i"
+      writeDataManually(data, file, allowBatching)
+      data
+    }.flatten
 
-    def assertDriverLogClass[T <: WriteAheadLog: ClassTag](conf: SparkConf): WriteAheadLog = {
-      val log = WriteAheadLogUtils.createLogForDriver(conf, logDir, hadoopConf)
-      assert(log.getClass === implicitly[ClassTag[T]].runtimeClass)
-      log
+    val logDirectoryPath = new Path(testDir)
+    val fileSystem = HdfsUtils.getFileSystemForPath(logDirectoryPath, hadoopConf)
+    assert(fileSystem.exists(logDirectoryPath) === true)
+
+    // Read data using manager and verify
+    val readData = readDataUsingWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    assert(readData === writtenData)
+  }
+
+  test(testPrefix + "write logs") {
+    // Write data with rotation using WriteAheadLog class
+    val dataToWrite = generateRandomData()
+    writeDataUsingWriteAheadLog(testDir, dataToWrite, closeFileAfterWrite = closeFileAfterWrite,
+      allowBatching = allowBatching)
+
+    // Read data manually to verify the written data
+    val logFiles = getLogFilesInDirectory(testDir)
+    assert(logFiles.size > 1)
+    val writtenData = readAndDeserializeDataManually(logFiles, allowBatching)
+    assert(writtenData === dataToWrite)
+  }
+
+  test(testPrefix + "read all logs after write") {
+    // Write data with manager, recover with new manager and verify
+    val dataToWrite = generateRandomData()
+    writeDataUsingWriteAheadLog(testDir, dataToWrite, closeFileAfterWrite, allowBatching)
+    val logFiles = getLogFilesInDirectory(testDir)
+    assert(logFiles.size > 1)
+    val readData = readDataUsingWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    assert(dataToWrite === readData)
+  }
+
+  test(testPrefix + "clean old logs") {
+    logCleanUpTest(waitForCompletion = false)
+  }
+
+  test(testPrefix + "clean old logs synchronously") {
+    logCleanUpTest(waitForCompletion = true)
+  }
+
+  private def logCleanUpTest(waitForCompletion: Boolean): Unit = {
+    // Write data with manager, recover with new manager and verify
+    val manualClock = new ManualClock
+    val dataToWrite = generateRandomData()
+    writeAheadLog = writeDataUsingWriteAheadLog(testDir, dataToWrite, closeFileAfterWrite,
+      allowBatching, manualClock, closeLog = false)
+    val logFiles = getLogFilesInDirectory(testDir)
+    assert(logFiles.size > 1)
+
+    writeAheadLog.clean(manualClock.getTimeMillis() / 2, waitForCompletion)
+
+    if (waitForCompletion) {
+      assert(getLogFilesInDirectory(testDir).size < logFiles.size)
+    } else {
+      eventually(Eventually.timeout(1 second), interval(10 milliseconds)) {
+        assert(getLogFilesInDirectory(testDir).size < logFiles.size)
+      }
     }
+  }
 
-    def assertReceiverLogClass[T: ClassTag](conf: SparkConf): WriteAheadLog = {
-      val log = WriteAheadLogUtils.createLogForReceiver(conf, logDir, hadoopConf)
-      assert(log.getClass === implicitly[ClassTag[T]].runtimeClass)
-      log
+  test(testPrefix + "handling file errors while reading rotating logs") {
+    // Generate a set of log files
+    val manualClock = new ManualClock
+    val dataToWrite1 = generateRandomData()
+    writeDataUsingWriteAheadLog(testDir, dataToWrite1, closeFileAfterWrite, allowBatching,
+      manualClock)
+    val logFiles1 = getLogFilesInDirectory(testDir)
+    assert(logFiles1.size > 1)
+
+
+    // Recover old files and generate a second set of log files
+    val dataToWrite2 = generateRandomData()
+    manualClock.advance(100000)
+    writeDataUsingWriteAheadLog(testDir, dataToWrite2, closeFileAfterWrite, allowBatching ,
+      manualClock)
+    val logFiles2 = getLogFilesInDirectory(testDir)
+    assert(logFiles2.size > logFiles1.size)
+
+    // Read the files and verify that all the written data can be read
+    val readData1 = readDataUsingWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    assert(readData1 === (dataToWrite1 ++ dataToWrite2))
+
+    // Corrupt the first set of files so that they are basically unreadable
+    logFiles1.foreach { f =>
+      val raf = new FileOutputStream(f, true).getChannel()
+      raf.truncate(1)
+      raf.close()
     }
 
-    val emptyConf = new SparkConf()  // no log configuration
-    assertDriverLogClass[FileBasedWriteAheadLog](emptyConf)
-    assertReceiverLogClass[FileBasedWriteAheadLog](emptyConf)
-
-    // Verify setting driver WAL class
-    val conf1 = new SparkConf().set("spark.streaming.driver.writeAheadLog.class",
-      classOf[MockWriteAheadLog0].getName())
-    assertDriverLogClass[MockWriteAheadLog0](conf1)
-    assertReceiverLogClass[FileBasedWriteAheadLog](conf1)
-
-    // Verify setting receiver WAL class
-    val receiverWALConf = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
-      classOf[MockWriteAheadLog0].getName())
-    assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf)
-    assertReceiverLogClass[MockWriteAheadLog0](receiverWALConf)
-
-    // Verify setting receiver WAL class with 1-arg constructor
-    val receiverWALConf2 = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
-      classOf[MockWriteAheadLog1].getName())
-    assertReceiverLogClass[MockWriteAheadLog1](receiverWALConf2)
-
-    // Verify failure setting receiver WAL class with 2-arg constructor
-    intercept[SparkException] {
-      val receiverWALConf3 = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
-        classOf[MockWriteAheadLog2].getName())
-      assertReceiverLogClass[MockWriteAheadLog1](receiverWALConf3)
+    // Verify that the corrupted files do not prevent reading of the second set of data
+    val readData = readDataUsingWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    assert(readData === dataToWrite2)
+  }
+
+  test(testPrefix + "do not create directories or files unless write") {
+    val nonexistentTempPath = File.createTempFile("test", "")
+    nonexistentTempPath.delete()
+    assert(!nonexistentTempPath.exists())
+
+    val writtenSegment = writeDataManually(generateRandomData(), testFile, allowBatching)
+    val wal = createWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    assert(!nonexistentTempPath.exists(), "Directory created just by creating log object")
+    if (allowBatching) {
+      intercept[UnsupportedOperationException](wal.read(writtenSegment.head))
+    } else {
+      wal.read(writtenSegment.head)
     }
+    assert(!nonexistentTempPath.exists(), "Directory created just by attempting to read segment")
   }
+}
+
+class FileBasedWriteAheadLogSuite
+  extends CommonWriteAheadLogTests(false, false, "FileBasedWriteAheadLog") {
+
+  import WriteAheadLogSuite._
 
   test("FileBasedWriteAheadLogWriter - writing data") {
     val dataToWrite = generateRandomData()
@@ -122,7 +219,7 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
 
   test("FileBasedWriteAheadLogReader - sequentially reading data") {
     val writtenData = generateRandomData()
-    writeDataManually(writtenData, testFile)
+    writeDataManually(writtenData, testFile, allowBatching = false)
     val reader = new FileBasedWriteAheadLogReader(testFile, hadoopConf)
     val readData = reader.toSeq.map(byteBufferToString)
     assert(readData === writtenData)
@@ -166,7 +263,7 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
   test("FileBasedWriteAheadLogRandomReader - reading data using random reader") {
     // Write data manually for testing the random reader
     val writtenData = generateRandomData()
-    val segments = writeDataManually(writtenData, testFile)
+    val segments = writeDataManually(writtenData, testFile, allowBatching = false)
 
     // Get a random order of these segments and read them back
     val writtenDataAndSegments = writtenData.zip(segments).toSeq.permutations.take(10).flatten
@@ -190,163 +287,212 @@ class WriteAheadLogSuite extends SparkFunSuite with BeforeAndAfter {
     }
     reader.close()
   }
+}
 
-  test("FileBasedWriteAheadLog - write rotating logs") {
-    // Write data with rotation using WriteAheadLog class
-    val dataToWrite = generateRandomData()
-    writeDataUsingWriteAheadLog(testDir, dataToWrite)
-
-    // Read data manually to verify the written data
-    val logFiles = getLogFilesInDirectory(testDir)
-    assert(logFiles.size > 1)
-    val writtenData = logFiles.flatMap { file => readDataManually(file)}
-    assert(writtenData === dataToWrite)
-  }
+abstract class CloseFileAfterWriteTests(allowBatching: Boolean, testTag: String)
+  extends CommonWriteAheadLogTests(allowBatching, closeFileAfterWrite = true, testTag) {
 
-  test("FileBasedWriteAheadLog - close after write flag") {
+  import WriteAheadLogSuite._
+  test(testPrefix + "close after write flag") {
     // Write data with rotation using WriteAheadLog class
     val numFiles = 3
     val dataToWrite = Seq.tabulate(numFiles)(_.toString)
     // total advance time is less than 1000, therefore log shouldn't be rolled, but manually closed
     writeDataUsingWriteAheadLog(testDir, dataToWrite, closeLog = false, clockAdvanceTime = 100,
-      closeFileAfterWrite = true)
+      closeFileAfterWrite = true, allowBatching = allowBatching)
 
     // Read data manually to verify the written data
     val logFiles = getLogFilesInDirectory(testDir)
     assert(logFiles.size === numFiles)
-    val writtenData = logFiles.flatMap { file => readDataManually(file)}
+    val writtenData: Seq[String] = readAndDeserializeDataManually(logFiles, allowBatching)
     assert(writtenData === dataToWrite)
   }
+}
 
-  test("FileBasedWriteAheadLog - read rotating logs") {
-    // Write data manually for testing reading through WriteAheadLog
-    val writtenData = (1 to 10).map { i =>
-      val data = generateRandomData()
-      val file = testDir + s"/log-$i-$i"
-      writeDataManually(data, file)
-      data
-    }.flatten
+class FileBasedWriteAheadLogWithFileCloseAfterWriteSuite
+  extends CloseFileAfterWriteTests(allowBatching = false, "FileBasedWriteAheadLog")
 
-    val logDirectoryPath = new Path(testDir)
-    val fileSystem = HdfsUtils.getFileSystemForPath(logDirectoryPath, hadoopConf)
-    assert(fileSystem.exists(logDirectoryPath) === true)
+class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
+    allowBatching = true,
+    closeFileAfterWrite = false,
+    "BatchedWriteAheadLog") with MockitoSugar with BeforeAndAfterEach with Eventually {
 
-    // Read data using manager and verify
-    val readData = readDataUsingWriteAheadLog(testDir)
-    assert(readData === writtenData)
-  }
+  import BatchedWriteAheadLog._
+  import WriteAheadLogSuite._
 
-  test("FileBasedWriteAheadLog - recover past logs when creating new manager") {
-    // Write data with manager, recover with new manager and verify
-    val dataToWrite = generateRandomData()
-    writeDataUsingWriteAheadLog(testDir, dataToWrite)
-    val logFiles = getLogFilesInDirectory(testDir)
-    assert(logFiles.size > 1)
-    val readData = readDataUsingWriteAheadLog(testDir)
-    assert(dataToWrite === readData)
+  private var wal: WriteAheadLog = _
+  private var walHandle: WriteAheadLogRecordHandle = _
+  private var walBatchingThreadPool: ThreadPoolExecutor = _
+  private var walBatchingExecutionContext: ExecutionContextExecutorService = _
+  private val sparkConf = new SparkConf()
+
+  override def beforeEach(): Unit = {
+    wal = mock[WriteAheadLog]
+    walHandle = mock[WriteAheadLogRecordHandle]
+    walBatchingThreadPool = ThreadUtils.newDaemonFixedThreadPool(8, "wal-test-thread-pool")
+    walBatchingExecutionContext = ExecutionContext.fromExecutorService(walBatchingThreadPool)
   }
 
-  test("FileBasedWriteAheadLog - clean old logs") {
-    logCleanUpTest(waitForCompletion = false)
+  override def afterEach(): Unit = {
+    if (walBatchingExecutionContext != null) {
+      walBatchingExecutionContext.shutdownNow()
+    }
   }
 
-  test("FileBasedWriteAheadLog - clean old logs synchronously") {
-    logCleanUpTest(waitForCompletion = true)
-  }
+  test("BatchedWriteAheadLog - serializing and deserializing batched records") {
+    val events = Seq(
+      BlockAdditionEvent(ReceivedBlockInfo(0, None, None, null)),
+      BatchAllocationEvent(null, null),
+      BatchCleanupEvent(Nil)
+    )
 
-  private def logCleanUpTest(waitForCompletion: Boolean): Unit = {
-    // Write data with manager, recover with new manager and verify
-    val manualClock = new ManualClock
-    val dataToWrite = generateRandomData()
-    writeAheadLog = writeDataUsingWriteAheadLog(testDir, dataToWrite, manualClock, closeLog = false)
-    val logFiles = getLogFilesInDirectory(testDir)
-    assert(logFiles.size > 1)
+    val buffers = events.map(e => Record(ByteBuffer.wrap(Utils.serialize(e)), 0L, null))
+    val batched = BatchedWriteAheadLog.aggregate(buffers)
+    val deaggregate = BatchedWriteAheadLog.deaggregate(batched).map(buffer =>
+      Utils.deserialize[ReceivedBlockTrackerLogEvent](buffer.array()))
 
-    writeAheadLog.clean(manualClock.getTimeMillis() / 2, waitForCompletion)
+    assert(deaggregate.toSeq === events)
+  }
 
-    if (waitForCompletion) {
-      assert(getLogFilesInDirectory(testDir).size < logFiles.size)
-    } else {
-      eventually(timeout(1 second), interval(10 milliseconds)) {
-        assert(getLogFilesInDirectory(testDir).size < logFiles.size)
-      }
+  test("BatchedWriteAheadLog - failures in wrappedLog get bubbled up") {
+    when(wal.write(any[ByteBuffer], anyLong)).thenThrow(new RuntimeException("Hello!"))
+    // the BatchedWriteAheadLog should bubble up any exceptions that may have happened during writes
+    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
+
+    intercept[RuntimeException] {
+      val buffer = mock[ByteBuffer]
+      batchedWal.write(buffer, 2L)
     }
   }
 
-  test("FileBasedWriteAheadLog - handling file errors while reading rotating logs") {
-    // Generate a set of log files
-    val manualClock = new ManualClock
-    val dataToWrite1 = generateRandomData()
-    writeDataUsingWriteAheadLog(testDir, dataToWrite1, manualClock)
-    val logFiles1 = getLogFilesInDirectory(testDir)
-    assert(logFiles1.size > 1)
+  // we make the write requests in separate threads so that we don't block the test thread
+  private def promiseWriteEvent(wal: WriteAheadLog, event: String, time: Long): Promise[Unit] = {
+    val p = Promise[Unit]()
+    p.completeWith(Future {
+      val v = wal.write(event, time)
+      assert(v === walHandle)
+    }(walBatchingExecutionContext))
+    p
+  }
 
+  /**
+   * In order to block the writes on the writer thread, we mock the write method, and block it
+   * for some time with a promise.
+   */
+  private def writeBlockingPromise(wal: WriteAheadLog): Promise[Any] = {
+    // we would like to block the write so that we can queue requests
+    val promise = Promise[Any]()
+    when(wal.write(any[ByteBuffer], any[Long])).thenAnswer(
+      new Answer[WriteAheadLogRecordHandle] {
+        override def answer(invocation: InvocationOnMock): WriteAheadLogRecordHandle = {
+          Await.ready(promise.future, 4.seconds)
+          walHandle
+        }
+      }
+    )
+    promise
+  }
 
-    // Recover old files and generate a second set of log files
-    val dataToWrite2 = generateRandomData()
-    manualClock.advance(100000)
-    writeDataUsingWriteAheadLog(testDir, dataToWrite2, manualClock)
-    val logFiles2 = getLogFilesInDirectory(testDir)
-    assert(logFiles2.size > logFiles1.size)
+  test("BatchedWriteAheadLog - name log with aggregated entries with the timestamp of last entry") {
+    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
+    // block the write so that we can batch some records
+    val promise = writeBlockingPromise(wal)
+
+    val event1 = "hello"
+    val event2 = "world"
+    val event3 = "this"
+    val event4 = "is"
+    val event5 = "doge"
+
+    // The queue.take() immediately takes the 3, and there is nothing left in the queue at that
+    // moment. Then the promise blocks the writing of 3. The rest get queued.
+    promiseWriteEvent(batchedWal, event1, 3L)
+    // rest of the records will be batched while it takes 3 to get written
+    promiseWriteEvent(batchedWal, event2, 5L)
+    promiseWriteEvent(batchedWal, event3, 8L)
+    promiseWriteEvent(batchedWal, event4, 12L)
+    promiseWriteEvent(batchedWal, event5, 10L)
+    eventually(timeout(1 second)) {
+      assert(walBatchingThreadPool.getActiveCount === 5)
+    }
+    promise.success(true)
 
-    // Read the files and verify that all the written data can be read
-    val readData1 = readDataUsingWriteAheadLog(testDir)
-    assert(readData1 === (dataToWrite1 ++ dataToWrite2))
+    val buffer1 = wrapArrayArrayByte(Array(event1))
+    val buffer2 = wrapArrayArrayByte(Array(event2, event3, event4, event5))
 
-    // Corrupt the first set of files so that they are basically unreadable
-    logFiles1.foreach { f =>
-      val raf = new FileOutputStream(f, true).getChannel()
-      raf.truncate(1)
-      raf.close()
+    eventually(timeout(1 second)) {
+      verify(wal, times(1)).write(meq(buffer1), meq(3L))
+      // the file name should be the timestamp of the last record, as events should be naturally
+      // in order of timestamp, and we need the last element.
+      verify(wal, times(1)).write(meq(buffer2), meq(10L))
     }
-
-    // Verify that the corrupted files do not prevent reading of the second set of data
-    val readData = readDataUsingWriteAheadLog(testDir)
-    assert(readData === dataToWrite2)
   }
 
-  test("FileBasedWriteAheadLog - do not create directories or files unless write") {
-    val nonexistentTempPath = File.createTempFile("test", "")
-    nonexistentTempPath.delete()
-    assert(!nonexistentTempPath.exists())
+  test("BatchedWriteAheadLog - shutdown properly") {
+    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
+    batchedWal.close()
+    verify(wal, times(1)).close()
 
-    val writtenSegment = writeDataManually(generateRandomData(), testFile)
-    val wal = new FileBasedWriteAheadLog(new SparkConf(), tempDir.getAbsolutePath,
-      new Configuration(), 1, 1, closeFileAfterWrite = false)
-    assert(!nonexistentTempPath.exists(), "Directory created just by creating log object")
-    wal.read(writtenSegment.head)
-    assert(!nonexistentTempPath.exists(), "Directory created just by attempting to read segment")
+    intercept[IllegalStateException](batchedWal.write(mock[ByteBuffer], 12L))
   }
-}
 
-object WriteAheadLogSuite {
+  test("BatchedWriteAheadLog - fail everything in queue during shutdown") {
+    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
 
-  class MockWriteAheadLog0() extends WriteAheadLog {
-    override def write(record: ByteBuffer, time: Long): WriteAheadLogRecordHandle = { null }
-    override def read(handle: WriteAheadLogRecordHandle): ByteBuffer = { null }
-    override def readAll(): util.Iterator[ByteBuffer] = { null }
-    override def clean(threshTime: Long, waitForCompletion: Boolean): Unit = { }
-    override def close(): Unit = { }
-  }
+    // block the write so that we can batch some records
+    writeBlockingPromise(wal)
+
+    val event1 = ("hello", 3L)
+    val event2 = ("world", 5L)
+    val event3 = ("this", 8L)
+    val event4 = ("is", 9L)
+    val event5 = ("doge", 10L)
+
+    // The queue.take() immediately takes the 3, and there is nothing left in the queue at that
+    // moment. Then the promise blocks the writing of 3. The rest get queued.
+    val writePromises = Seq(event1, event2, event3, event4, event5).map { event =>
+      promiseWriteEvent(batchedWal, event._1, event._2)
+    }
 
-  class MockWriteAheadLog1(val conf: SparkConf) extends MockWriteAheadLog0()
+    eventually(timeout(1 second)) {
+      assert(walBatchingThreadPool.getActiveCount === 5)
+    }
+
+    batchedWal.close()
+    eventually(timeout(1 second)) {
+      assert(writePromises.forall(_.isCompleted))
+      assert(writePromises.forall(_.future.value.get.isFailure)) // all should have failed
+    }
+  }
+}
 
-  class MockWriteAheadLog2(val conf: SparkConf, x: Int) extends MockWriteAheadLog0()
+class BatchedWriteAheadLogWithCloseFileAfterWriteSuite
+  extends CloseFileAfterWriteTests(allowBatching = true, "BatchedWriteAheadLog")
 
+object WriteAheadLogSuite {
 
   private val hadoopConf = new Configuration()
 
   /** Write data to a file directly and return an array of the file segments written. */
-  def writeDataManually(data: Seq[String], file: String): Seq[FileBasedWriteAheadLogSegment] = {
+  def writeDataManually(
+      data: Seq[String],
+      file: String,
+      allowBatching: Boolean): Seq[FileBasedWriteAheadLogSegment] = {
     val segments = new ArrayBuffer[FileBasedWriteAheadLogSegment]()
     val writer = HdfsUtils.getOutputStream(file, hadoopConf)
-    data.foreach { item =>
+    def writeToStream(bytes: Array[Byte]): Unit = {
       val offset = writer.getPos
-      val bytes = Utils.serialize(item)
       writer.writeInt(bytes.size)
       writer.write(bytes)
       segments += FileBasedWriteAheadLogSegment(file, offset, bytes.size)
     }
+    if (allowBatching) {
+      writeToStream(wrapArrayArrayByte(data.toArray[String]).array())
+    } else {
+      data.foreach { item =>
+        writeToStream(Utils.serialize(item))
+      }
+    }
     writer.close()
     segments
   }
@@ -356,8 +502,7 @@ object WriteAheadLogSuite {
    */
   def writeDataUsingWriter(
       filePath: String,
-      data: Seq[String]
-    ): Seq[FileBasedWriteAheadLogSegment] = {
+      data: Seq[String]): Seq[FileBasedWriteAheadLogSegment] = {
     val writer = new FileBasedWriteAheadLogWriter(filePath, hadoopConf)
     val segments = data.map {
       item => writer.write(item)
@@ -370,13 +515,13 @@ object WriteAheadLogSuite {
   def writeDataUsingWriteAheadLog(
       logDirectory: String,
       data: Seq[String],
+      closeFileAfterWrite: Boolean,
+      allowBatching: Boolean,
       manualClock: ManualClock = new ManualClock,
       closeLog: Boolean = true,
-      clockAdvanceTime: Int = 500,
-      closeFileAfterWrite: Boolean = false): FileBasedWriteAheadLog = {
+      clockAdvanceTime: Int = 500): WriteAheadLog = {
     if (manualClock.getTimeMillis() < 100000) manualClock.setTime(10000)
-    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1,
-      closeFileAfterWrite)
+    val wal = createWriteAheadLog(logDirectory, closeFileAfterWrite, allowBatching)
 
     // Ensure that 500 does not get sorted after 2000, so put a high base value.
     data.foreach { item =>
@@ -406,16 +551,16 @@ object WriteAheadLogSuite {
   }
 
   /** Read all the data from a log file directly and return the list of byte buffers. */
-  def readDataManually(file: String): Seq[String] = {
+  def readDataManually[T](file: String): Seq[T] = {
     val reader = HdfsUtils.getInputStream(file, hadoopConf)
-    val buffer = new ArrayBuffer[String]
+    val buffer = new ArrayBuffer[T]
     try {
       while (true) {
         // Read till EOF is thrown
         val length = reader.readInt()
         val bytes = new Array[Byte](length)
         reader.read(bytes)
-        buffer += Utils.deserialize[String](bytes)
+        buffer += Utils.deserialize[T](bytes)
       }
     } catch {
       case ex: EOFException =>
@@ -434,15 +579,17 @@ object WriteAheadLogSuite {
   }
 
   /** Read all the data in the log file in a directory using the WriteAheadLog class. */
-  def readDataUsingWriteAheadLog(logDirectory: String): Seq[String] = {
-    val wal = new FileBasedWriteAheadLog(new SparkConf(), logDirectory, hadoopConf, 1, 1,
-      closeFileAfterWrite = false)
+  def readDataUsingWriteAheadLog(
+      logDirectory: String,
+      closeFileAfterWrite: Boolean,
+      allowBatching: Boolean): Seq[String] = {
+    val wal = createWriteAheadLog(logDirectory, closeFileAfterWrite, allowBatching)
     val data = wal.readAll().asScala.map(byteBufferToString).toSeq
     wal.close()
     data
   }
 
-  /** Get the log files in a direction */
+  /** Get the log files in a directory. */
   def getLogFilesInDirectory(directory: String): Seq[String] = {
     val logDirectoryPath = new Path(directory)
     val fileSystem = HdfsUtils.getFileSystemForPath(logDirectoryPath, hadoopConf)
@@ -458,10 +605,31 @@ object WriteAheadLogSuite {
     }
   }
 
+  def createWriteAheadLog(
+      logDirectory: String,
+      closeFileAfterWrite: Boolean,
+      allowBatching: Boolean): WriteAheadLog = {
+    val sparkConf = new SparkConf
+    val wal = new FileBasedWriteAheadLog(sparkConf, logDirectory, hadoopConf, 1, 1,
+      closeFileAfterWrite)
+    if (allowBatching) new BatchedWriteAheadLog(wal, sparkConf) else wal
+  }
+
   def generateRandomData(): Seq[String] = {
     (1 to 100).map { _.toString }
   }
 
+  def readAndDeserializeDataManually(logFiles: Seq[String], allowBatching: Boolean): Seq[String] = {
+    if (allowBatching) {
+      logFiles.flatMap { file =>
+        val data = readDataManually[Array[Array[Byte]]](file)
+        data.flatMap(byteArray => byteArray.map(Utils.deserialize[String]))
+      }
+    } else {
+      logFiles.flatMap { file => readDataManually[String](file)}
+    }
+  }
+
   implicit def stringToByteBuffer(str: String): ByteBuffer = {
     ByteBuffer.wrap(Utils.serialize(str))
   }
@@ -469,4 +637,8 @@ object WriteAheadLogSuite {
   implicit def byteBufferToString(byteBuffer: ByteBuffer): String = {
     Utils.deserialize[String](byteBuffer.array)
   }
+
+  def wrapArrayArrayByte[T](records: Array[T]): ByteBuffer = {
+    ByteBuffer.wrap(Utils.serialize[Array[Array[Byte]]](records.map(Utils.serialize[T])))
+  }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala
new file mode 100644
index 000000000000..9152728191ea
--- /dev/null
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.util
+
+import java.nio.ByteBuffer
+import java.util
+
+import scala.reflect.ClassTag
+
+import org.apache.hadoop.conf.Configuration
+
+import org.apache.spark.{SparkException, SparkConf, SparkFunSuite}
+import org.apache.spark.util.Utils
+
+class WriteAheadLogUtilsSuite extends SparkFunSuite {
+  import WriteAheadLogUtilsSuite._
+
+  private val logDir = Utils.createTempDir().getAbsolutePath()
+  private val hadoopConf = new Configuration()
+
+  def assertDriverLogClass[T <: WriteAheadLog: ClassTag](
+      conf: SparkConf,
+      isBatched: Boolean = false): WriteAheadLog = {
+    val log = WriteAheadLogUtils.createLogForDriver(conf, logDir, hadoopConf)
+    if (isBatched) {
+      assert(log.isInstanceOf[BatchedWriteAheadLog])
+      val parentLog = log.asInstanceOf[BatchedWriteAheadLog].wrappedLog
+      assert(parentLog.getClass === implicitly[ClassTag[T]].runtimeClass)
+    } else {
+      assert(log.getClass === implicitly[ClassTag[T]].runtimeClass)
+    }
+    log
+  }
+
+  def assertReceiverLogClass[T <: WriteAheadLog: ClassTag](conf: SparkConf): WriteAheadLog = {
+    val log = WriteAheadLogUtils.createLogForReceiver(conf, logDir, hadoopConf)
+    assert(log.getClass === implicitly[ClassTag[T]].runtimeClass)
+    log
+  }
+
+  test("log selection and creation") {
+
+    val emptyConf = new SparkConf()  // no log configuration
+    assertDriverLogClass[FileBasedWriteAheadLog](emptyConf)
+    assertReceiverLogClass[FileBasedWriteAheadLog](emptyConf)
+
+    // Verify setting driver WAL class
+    val driverWALConf = new SparkConf().set("spark.streaming.driver.writeAheadLog.class",
+      classOf[MockWriteAheadLog0].getName())
+    assertDriverLogClass[MockWriteAheadLog0](driverWALConf)
+    assertReceiverLogClass[FileBasedWriteAheadLog](driverWALConf)
+
+    // Verify setting receiver WAL class
+    val receiverWALConf = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
+      classOf[MockWriteAheadLog0].getName())
+    assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf)
+    assertReceiverLogClass[MockWriteAheadLog0](receiverWALConf)
+
+    // Verify setting receiver WAL class with 1-arg constructor
+    val receiverWALConf2 = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
+      classOf[MockWriteAheadLog1].getName())
+    assertReceiverLogClass[MockWriteAheadLog1](receiverWALConf2)
+
+    // Verify failure setting receiver WAL class with 2-arg constructor
+    intercept[SparkException] {
+      val receiverWALConf3 = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
+        classOf[MockWriteAheadLog2].getName())
+      assertReceiverLogClass[MockWriteAheadLog1](receiverWALConf3)
+    }
+  }
+
+  test("wrap WriteAheadLog in BatchedWriteAheadLog when batching is enabled") {
+    def getBatchedSparkConf: SparkConf =
+      new SparkConf().set("spark.streaming.driver.writeAheadLog.allowBatching", "true")
+
+    val justBatchingConf = getBatchedSparkConf
+    assertDriverLogClass[FileBasedWriteAheadLog](justBatchingConf, isBatched = true)
+    assertReceiverLogClass[FileBasedWriteAheadLog](justBatchingConf)
+
+    // Verify setting driver WAL class
+    val driverWALConf = getBatchedSparkConf.set("spark.streaming.driver.writeAheadLog.class",
+      classOf[MockWriteAheadLog0].getName())
+    assertDriverLogClass[MockWriteAheadLog0](driverWALConf, isBatched = true)
+    assertReceiverLogClass[FileBasedWriteAheadLog](driverWALConf)
+
+    // Verify receivers are not wrapped
+    val receiverWALConf = getBatchedSparkConf.set("spark.streaming.receiver.writeAheadLog.class",
+      classOf[MockWriteAheadLog0].getName())
+    assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf, isBatched = true)
+    assertReceiverLogClass[MockWriteAheadLog0](receiverWALConf)
+  }
+}
+
+object WriteAheadLogUtilsSuite {
+
+  class MockWriteAheadLog0() extends WriteAheadLog {
+    override def write(record: ByteBuffer, time: Long): WriteAheadLogRecordHandle = { null }
+    override def read(handle: WriteAheadLogRecordHandle): ByteBuffer = { null }
+    override def readAll(): util.Iterator[ByteBuffer] = { null }
+    override def clean(threshTime: Long, waitForCompletion: Boolean): Unit = { }
+    override def close(): Unit = { }
+  }
+
+  class MockWriteAheadLog1(val conf: SparkConf) extends MockWriteAheadLog0()
+
+  class MockWriteAheadLog2(val conf: SparkConf, x: Int) extends MockWriteAheadLog0()
+}

From 1f0f14efe35f986e338ee2cbc1ef2a9ce7395c00 Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Mon, 9 Nov 2015 17:38:19 -0800
Subject: [PATCH 586/896] [SPARK-11462][STREAMING] Add JavaStreamingListener

Currently, StreamingListener is not Java friendly because it exposes some Scala collections to Java users directly, such as Option, Map.

This PR added a Java version of StreamingListener and a bunch of Java friendly classes for Java users.

Author: zsxwing <zsxwing@gmail.com>
Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9420 from zsxwing/java-streaming-listener.
---
 .../api/java/JavaStreamingListener.scala      | 168 ++++++++++
 .../java/JavaStreamingListenerWrapper.scala   | 122 ++++++++
 .../JavaStreamingListenerAPISuite.java        |  85 +++++
 .../JavaStreamingListenerWrapperSuite.scala   | 290 ++++++++++++++++++
 4 files changed, 665 insertions(+)
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
 create mode 100644 streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
 create mode 100644 streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
new file mode 100644
index 000000000000..c86c7101ff6d
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
@@ -0,0 +1,168 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.api.java
+
+import org.apache.spark.streaming.Time
+
+/**
+ * A listener interface for receiving information about an ongoing streaming  computation.
+ */
+private[streaming] class JavaStreamingListener {
+
+  /** Called when a receiver has been started */
+  def onReceiverStarted(receiverStarted: JavaStreamingListenerReceiverStarted): Unit = { }
+
+  /** Called when a receiver has reported an error */
+  def onReceiverError(receiverError: JavaStreamingListenerReceiverError): Unit = { }
+
+  /** Called when a receiver has been stopped */
+  def onReceiverStopped(receiverStopped: JavaStreamingListenerReceiverStopped): Unit = { }
+
+  /** Called when a batch of jobs has been submitted for processing. */
+  def onBatchSubmitted(batchSubmitted: JavaStreamingListenerBatchSubmitted): Unit = { }
+
+  /** Called when processing of a batch of jobs has started.  */
+  def onBatchStarted(batchStarted: JavaStreamingListenerBatchStarted): Unit = { }
+
+  /** Called when processing of a batch of jobs has completed. */
+  def onBatchCompleted(batchCompleted: JavaStreamingListenerBatchCompleted): Unit = { }
+
+  /** Called when processing of a job of a batch has started. */
+  def onOutputOperationStarted(
+      outputOperationStarted: JavaStreamingListenerOutputOperationStarted): Unit = { }
+
+  /** Called when processing of a job of a batch has completed. */
+  def onOutputOperationCompleted(
+      outputOperationCompleted: JavaStreamingListenerOutputOperationCompleted): Unit = { }
+}
+
+/**
+ * Base trait for events related to JavaStreamingListener
+ */
+private[streaming] sealed trait JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerBatchSubmitted(val batchInfo: JavaBatchInfo)
+  extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerBatchCompleted(val batchInfo: JavaBatchInfo)
+  extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerBatchStarted(val batchInfo: JavaBatchInfo)
+  extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerOutputOperationStarted(
+    val outputOperationInfo: JavaOutputOperationInfo) extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerOutputOperationCompleted(
+    val outputOperationInfo: JavaOutputOperationInfo) extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerReceiverStarted(val receiverInfo: JavaReceiverInfo)
+  extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerReceiverError(val receiverInfo: JavaReceiverInfo)
+  extends JavaStreamingListenerEvent
+
+private[streaming] class JavaStreamingListenerReceiverStopped(val receiverInfo: JavaReceiverInfo)
+  extends JavaStreamingListenerEvent
+
+/**
+ * Class having information on batches.
+ *
+ * @param batchTime Time of the batch
+ * @param streamIdToInputInfo A map of input stream id to its input info
+ * @param submissionTime Clock time of when jobs of this batch was submitted to the streaming
+ *                       scheduler queue
+ * @param processingStartTime Clock time of when the first job of this batch started processing.
+ *                            `-1` means the batch has not yet started
+ * @param processingEndTime Clock time of when the last job of this batch finished processing. `-1`
+ *                          means the batch has not yet completed.
+ * @param schedulingDelay Time taken for the first job of this batch to start processing from the
+ *                        time this batch was submitted to the streaming scheduler. Essentially, it
+ *                        is `processingStartTime` - `submissionTime`. `-1` means the batch has not
+ *                        yet started
+ * @param processingDelay Time taken for the all jobs of this batch to finish processing from the
+ *                        time they started processing. Essentially, it is
+ *                        `processingEndTime` - `processingStartTime`. `-1` means the batch has not
+ *                        yet completed.
+ * @param totalDelay Time taken for all the jobs of this batch to finish processing from the time
+ *                   they were submitted.  Essentially, it is `processingDelay` + `schedulingDelay`.
+ *                   `-1` means the batch has not yet completed.
+ * @param numRecords The number of recorders received by the receivers in this batch
+ * @param outputOperationInfos The output operations in this batch
+ */
+private[streaming] case class JavaBatchInfo(
+    batchTime: Time,
+    streamIdToInputInfo: java.util.Map[Int, JavaStreamInputInfo],
+    submissionTime: Long,
+    processingStartTime: Long,
+    processingEndTime: Long,
+    schedulingDelay: Long,
+    processingDelay: Long,
+    totalDelay: Long,
+    numRecords: Long,
+    outputOperationInfos: java.util.Map[Int, JavaOutputOperationInfo])
+
+/**
+ * Track the information of input stream at specified batch time.
+ *
+ * @param inputStreamId the input stream id
+ * @param numRecords the number of records in a batch
+ * @param metadata metadata for this batch. It should contain at least one standard field named
+ *                 "Description" which maps to the content that will be shown in the UI.
+ * @param metadataDescription description of this input stream
+ */
+private[streaming] case class JavaStreamInputInfo(
+    inputStreamId: Int,
+    numRecords: Long,
+    metadata: java.util.Map[String, Any],
+    metadataDescription: String)
+
+/**
+ * Class having information about a receiver
+ */
+private[streaming] case class JavaReceiverInfo(
+    streamId: Int,
+    name: String,
+    active: Boolean,
+    location: String,
+    lastErrorMessage: String,
+    lastError: String,
+    lastErrorTime: Long)
+
+/**
+ * Class having information on output operations.
+ *
+ * @param batchTime Time of the batch
+ * @param id Id of this output operation. Different output operations have different ids in a batch.
+ * @param name The name of this output operation.
+ * @param description The description of this output operation.
+ * @param startTime Clock time of when the output operation started processing. `-1` means the
+ *                  output operation has not yet started
+ * @param endTime Clock time of when the output operation started processing. `-1` means the output
+ *                operation has not yet completed
+ * @param failureReason Failure reason if this output operation fails. If the output operation is
+ *                      successful, this field is `null`.
+ */
+private[streaming] case class JavaOutputOperationInfo(
+    batchTime: Time,
+    id: Int,
+    name: String,
+    description: String,
+    startTime: Long,
+    endTime: Long,
+    failureReason: String)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
new file mode 100644
index 000000000000..2c60b396a661
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.api.java
+
+import scala.collection.JavaConverters._
+
+import org.apache.spark.streaming.scheduler._
+
+/**
+ * A wrapper to convert a [[JavaStreamingListener]] to a [[StreamingListener]].
+ */
+private[streaming] class JavaStreamingListenerWrapper(javaStreamingListener: JavaStreamingListener)
+  extends StreamingListener {
+
+  private def toJavaReceiverInfo(receiverInfo: ReceiverInfo): JavaReceiverInfo = {
+    JavaReceiverInfo(
+      receiverInfo.streamId,
+      receiverInfo.name,
+      receiverInfo.active,
+      receiverInfo.location,
+      receiverInfo.lastErrorMessage,
+      receiverInfo.lastError,
+      receiverInfo.lastErrorTime
+    )
+  }
+
+  private def toJavaStreamInputInfo(streamInputInfo: StreamInputInfo): JavaStreamInputInfo = {
+    JavaStreamInputInfo(
+      streamInputInfo.inputStreamId,
+      streamInputInfo.numRecords: Long,
+      streamInputInfo.metadata.asJava,
+      streamInputInfo.metadataDescription.orNull
+    )
+  }
+
+  private def toJavaOutputOperationInfo(
+      outputOperationInfo: OutputOperationInfo): JavaOutputOperationInfo = {
+    JavaOutputOperationInfo(
+      outputOperationInfo.batchTime,
+      outputOperationInfo.id,
+      outputOperationInfo.name,
+      outputOperationInfo.description: String,
+      outputOperationInfo.startTime.getOrElse(-1),
+      outputOperationInfo.endTime.getOrElse(-1),
+      outputOperationInfo.failureReason.orNull
+    )
+  }
+
+  private def toJavaBatchInfo(batchInfo: BatchInfo): JavaBatchInfo = {
+    JavaBatchInfo(
+      batchInfo.batchTime,
+      batchInfo.streamIdToInputInfo.mapValues(toJavaStreamInputInfo(_)).asJava,
+      batchInfo.submissionTime,
+      batchInfo.processingStartTime.getOrElse(-1),
+      batchInfo.processingEndTime.getOrElse(-1),
+      batchInfo.schedulingDelay.getOrElse(-1),
+      batchInfo.processingDelay.getOrElse(-1),
+      batchInfo.totalDelay.getOrElse(-1),
+      batchInfo.numRecords,
+      batchInfo.outputOperationInfos.mapValues(toJavaOutputOperationInfo(_)).asJava
+    )
+  }
+
+  override def onReceiverStarted(receiverStarted: StreamingListenerReceiverStarted): Unit = {
+    javaStreamingListener.onReceiverStarted(
+      new JavaStreamingListenerReceiverStarted(toJavaReceiverInfo(receiverStarted.receiverInfo)))
+  }
+
+  override def onReceiverError(receiverError: StreamingListenerReceiverError): Unit = {
+    javaStreamingListener.onReceiverError(
+      new JavaStreamingListenerReceiverError(toJavaReceiverInfo(receiverError.receiverInfo)))
+  }
+
+  override def onReceiverStopped(receiverStopped: StreamingListenerReceiverStopped): Unit = {
+    javaStreamingListener.onReceiverStopped(
+      new JavaStreamingListenerReceiverStopped(toJavaReceiverInfo(receiverStopped.receiverInfo)))
+  }
+
+  override def onBatchSubmitted(batchSubmitted: StreamingListenerBatchSubmitted): Unit = {
+    javaStreamingListener.onBatchSubmitted(
+      new JavaStreamingListenerBatchSubmitted(toJavaBatchInfo(batchSubmitted.batchInfo)))
+  }
+
+  override def onBatchStarted(batchStarted: StreamingListenerBatchStarted): Unit = {
+    javaStreamingListener.onBatchStarted(
+      new JavaStreamingListenerBatchStarted(toJavaBatchInfo(batchStarted.batchInfo)))
+  }
+
+  override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted): Unit = {
+    javaStreamingListener.onBatchCompleted(
+      new JavaStreamingListenerBatchCompleted(toJavaBatchInfo(batchCompleted.batchInfo)))
+  }
+
+  override def onOutputOperationStarted(
+      outputOperationStarted: StreamingListenerOutputOperationStarted): Unit = {
+    javaStreamingListener.onOutputOperationStarted(new JavaStreamingListenerOutputOperationStarted(
+      toJavaOutputOperationInfo(outputOperationStarted.outputOperationInfo)))
+  }
+
+  override def onOutputOperationCompleted(
+      outputOperationCompleted: StreamingListenerOutputOperationCompleted): Unit = {
+    javaStreamingListener.onOutputOperationCompleted(
+      new JavaStreamingListenerOutputOperationCompleted(
+        toJavaOutputOperationInfo(outputOperationCompleted.outputOperationInfo)))
+  }
+
+}
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
new file mode 100644
index 000000000000..8cc285aa7fb3
--- /dev/null
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package org.apache.spark.streaming;
+
+import org.apache.spark.streaming.api.java.*;
+
+public class JavaStreamingListenerAPISuite extends JavaStreamingListener {
+
+  @Override
+  public void onReceiverStarted(JavaStreamingListenerReceiverStarted receiverStarted) {
+    JavaReceiverInfo receiverInfo = receiverStarted.receiverInfo();
+    receiverInfo.streamId();
+    receiverInfo.name();
+    receiverInfo.active();
+    receiverInfo.location();
+    receiverInfo.lastErrorMessage();
+    receiverInfo.lastError();
+    receiverInfo.lastErrorTime();
+  }
+
+  @Override
+  public void onReceiverError(JavaStreamingListenerReceiverError receiverError) {
+    JavaReceiverInfo receiverInfo = receiverError.receiverInfo();
+    receiverInfo.streamId();
+    receiverInfo.name();
+    receiverInfo.active();
+    receiverInfo.location();
+    receiverInfo.lastErrorMessage();
+    receiverInfo.lastError();
+    receiverInfo.lastErrorTime();
+  }
+
+  @Override
+  public void onReceiverStopped(JavaStreamingListenerReceiverStopped receiverStopped) {
+    JavaReceiverInfo receiverInfo = receiverStopped.receiverInfo();
+    receiverInfo.streamId();
+    receiverInfo.name();
+    receiverInfo.active();
+    receiverInfo.location();
+    receiverInfo.lastErrorMessage();
+    receiverInfo.lastError();
+    receiverInfo.lastErrorTime();
+  }
+
+  @Override
+  public void onBatchSubmitted(JavaStreamingListenerBatchSubmitted batchSubmitted) {
+    super.onBatchSubmitted(batchSubmitted);
+  }
+
+  @Override
+  public void onBatchStarted(JavaStreamingListenerBatchStarted batchStarted) {
+    super.onBatchStarted(batchStarted);
+  }
+
+  @Override
+  public void onBatchCompleted(JavaStreamingListenerBatchCompleted batchCompleted) {
+    super.onBatchCompleted(batchCompleted);
+  }
+
+  @Override
+  public void onOutputOperationStarted(JavaStreamingListenerOutputOperationStarted outputOperationStarted) {
+    super.onOutputOperationStarted(outputOperationStarted);
+  }
+
+  @Override
+  public void onOutputOperationCompleted(JavaStreamingListenerOutputOperationCompleted outputOperationCompleted) {
+    super.onOutputOperationCompleted(outputOperationCompleted);
+  }
+}
diff --git a/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala b/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala
new file mode 100644
index 000000000000..6d6d61e70caf
--- /dev/null
+++ b/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala
@@ -0,0 +1,290 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.api.java
+
+import scala.collection.JavaConverters._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.streaming.Time
+import org.apache.spark.streaming.scheduler._
+
+class JavaStreamingListenerWrapperSuite extends SparkFunSuite {
+
+  test("basic") {
+    val listener = new TestJavaStreamingListener()
+    val listenerWrapper = new JavaStreamingListenerWrapper(listener)
+
+    val receiverStarted = StreamingListenerReceiverStarted(ReceiverInfo(
+      streamId = 2,
+      name = "test",
+      active = true,
+      location = "localhost"
+    ))
+    listenerWrapper.onReceiverStarted(receiverStarted)
+    assertReceiverInfo(listener.receiverStarted.receiverInfo, receiverStarted.receiverInfo)
+
+    val receiverStopped = StreamingListenerReceiverStopped(ReceiverInfo(
+      streamId = 2,
+      name = "test",
+      active = false,
+      location = "localhost"
+    ))
+    listenerWrapper.onReceiverStopped(receiverStopped)
+    assertReceiverInfo(listener.receiverStopped.receiverInfo, receiverStopped.receiverInfo)
+
+    val receiverError = StreamingListenerReceiverError(ReceiverInfo(
+      streamId = 2,
+      name = "test",
+      active = false,
+      location = "localhost",
+      lastErrorMessage = "failed",
+      lastError = "failed",
+      lastErrorTime = System.currentTimeMillis()
+    ))
+    listenerWrapper.onReceiverError(receiverError)
+    assertReceiverInfo(listener.receiverError.receiverInfo, receiverError.receiverInfo)
+
+    val batchSubmitted = StreamingListenerBatchSubmitted(BatchInfo(
+      batchTime = Time(1000L),
+      streamIdToInputInfo = Map(
+        0 -> StreamInputInfo(
+          inputStreamId = 0,
+          numRecords = 1000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver1")),
+        1 -> StreamInputInfo(
+          inputStreamId = 1,
+          numRecords = 2000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver2"))),
+      submissionTime = 1001L,
+      None,
+      None,
+      outputOperationInfos = Map(
+        0 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 0,
+          name = "op1",
+          description = "operation1",
+          startTime = None,
+          endTime = None,
+          failureReason = None),
+        1 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 1,
+          name = "op2",
+          description = "operation2",
+          startTime = None,
+          endTime = None,
+          failureReason = None))
+    ))
+    listenerWrapper.onBatchSubmitted(batchSubmitted)
+    assertBatchInfo(listener.batchSubmitted.batchInfo, batchSubmitted.batchInfo)
+
+    val batchStarted = StreamingListenerBatchStarted(BatchInfo(
+      batchTime = Time(1000L),
+      streamIdToInputInfo = Map(
+        0 -> StreamInputInfo(
+          inputStreamId = 0,
+          numRecords = 1000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver1")),
+        1 -> StreamInputInfo(
+          inputStreamId = 1,
+          numRecords = 2000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver2"))),
+      submissionTime = 1001L,
+      Some(1002L),
+      None,
+      outputOperationInfos = Map(
+        0 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 0,
+          name = "op1",
+          description = "operation1",
+          startTime = Some(1003L),
+          endTime = None,
+          failureReason = None),
+        1 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 1,
+          name = "op2",
+          description = "operation2",
+          startTime = Some(1005L),
+          endTime = None,
+          failureReason = None))
+    ))
+    listenerWrapper.onBatchStarted(batchStarted)
+    assertBatchInfo(listener.batchStarted.batchInfo, batchStarted.batchInfo)
+
+    val batchCompleted = StreamingListenerBatchCompleted(BatchInfo(
+      batchTime = Time(1000L),
+      streamIdToInputInfo = Map(
+        0 -> StreamInputInfo(
+          inputStreamId = 0,
+          numRecords = 1000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver1")),
+        1 -> StreamInputInfo(
+          inputStreamId = 1,
+          numRecords = 2000,
+          metadata = Map(StreamInputInfo.METADATA_KEY_DESCRIPTION -> "receiver2"))),
+      submissionTime = 1001L,
+      Some(1002L),
+      Some(1010L),
+      outputOperationInfos = Map(
+        0 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 0,
+          name = "op1",
+          description = "operation1",
+          startTime = Some(1003L),
+          endTime = Some(1004L),
+          failureReason = None),
+        1 -> OutputOperationInfo(
+          batchTime = Time(1000L),
+          id = 1,
+          name = "op2",
+          description = "operation2",
+          startTime = Some(1005L),
+          endTime = Some(1010L),
+          failureReason = None))
+    ))
+    listenerWrapper.onBatchCompleted(batchCompleted)
+    assertBatchInfo(listener.batchCompleted.batchInfo, batchCompleted.batchInfo)
+
+    val outputOperationStarted = StreamingListenerOutputOperationStarted(OutputOperationInfo(
+      batchTime = Time(1000L),
+      id = 0,
+      name = "op1",
+      description = "operation1",
+      startTime = Some(1003L),
+      endTime = None,
+      failureReason = None
+    ))
+    listenerWrapper.onOutputOperationStarted(outputOperationStarted)
+    assertOutputOperationInfo(listener.outputOperationStarted.outputOperationInfo,
+      outputOperationStarted.outputOperationInfo)
+
+    val outputOperationCompleted = StreamingListenerOutputOperationCompleted(OutputOperationInfo(
+      batchTime = Time(1000L),
+      id = 0,
+      name = "op1",
+      description = "operation1",
+      startTime = Some(1003L),
+      endTime = Some(1004L),
+      failureReason = None
+    ))
+    listenerWrapper.onOutputOperationCompleted(outputOperationCompleted)
+    assertOutputOperationInfo(listener.outputOperationCompleted.outputOperationInfo,
+      outputOperationCompleted.outputOperationInfo)
+  }
+
+  private def assertReceiverInfo(
+      javaReceiverInfo: JavaReceiverInfo, receiverInfo: ReceiverInfo): Unit = {
+    assert(javaReceiverInfo.streamId === receiverInfo.streamId)
+    assert(javaReceiverInfo.name === receiverInfo.name)
+    assert(javaReceiverInfo.active === receiverInfo.active)
+    assert(javaReceiverInfo.location === receiverInfo.location)
+    assert(javaReceiverInfo.lastErrorMessage === receiverInfo.lastErrorMessage)
+    assert(javaReceiverInfo.lastError === receiverInfo.lastError)
+    assert(javaReceiverInfo.lastErrorTime === receiverInfo.lastErrorTime)
+  }
+
+  private def assertBatchInfo(javaBatchInfo: JavaBatchInfo, batchInfo: BatchInfo): Unit = {
+    assert(javaBatchInfo.batchTime === batchInfo.batchTime)
+    assert(javaBatchInfo.streamIdToInputInfo.size === batchInfo.streamIdToInputInfo.size)
+    batchInfo.streamIdToInputInfo.foreach { case (streamId, streamInputInfo) =>
+      assertStreamingInfo(javaBatchInfo.streamIdToInputInfo.get(streamId), streamInputInfo)
+    }
+    assert(javaBatchInfo.submissionTime === batchInfo.submissionTime)
+    assert(javaBatchInfo.processingStartTime === batchInfo.processingStartTime.getOrElse(-1))
+    assert(javaBatchInfo.processingEndTime === batchInfo.processingEndTime.getOrElse(-1))
+    assert(javaBatchInfo.schedulingDelay === batchInfo.schedulingDelay.getOrElse(-1))
+    assert(javaBatchInfo.processingDelay === batchInfo.processingDelay.getOrElse(-1))
+    assert(javaBatchInfo.totalDelay === batchInfo.totalDelay.getOrElse(-1))
+    assert(javaBatchInfo.numRecords === batchInfo.numRecords)
+    assert(javaBatchInfo.outputOperationInfos.size === batchInfo.outputOperationInfos.size)
+    batchInfo.outputOperationInfos.foreach { case (outputOperationId, outputOperationInfo) =>
+      assertOutputOperationInfo(
+        javaBatchInfo.outputOperationInfos.get(outputOperationId), outputOperationInfo)
+    }
+  }
+
+  private def assertStreamingInfo(
+      javaStreamInputInfo: JavaStreamInputInfo, streamInputInfo: StreamInputInfo): Unit = {
+    assert(javaStreamInputInfo.inputStreamId === streamInputInfo.inputStreamId)
+    assert(javaStreamInputInfo.numRecords === streamInputInfo.numRecords)
+    assert(javaStreamInputInfo.metadata === streamInputInfo.metadata.asJava)
+    assert(javaStreamInputInfo.metadataDescription === streamInputInfo.metadataDescription.orNull)
+  }
+
+  private def assertOutputOperationInfo(
+      javaOutputOperationInfo: JavaOutputOperationInfo,
+      outputOperationInfo: OutputOperationInfo): Unit = {
+    assert(javaOutputOperationInfo.batchTime === outputOperationInfo.batchTime)
+    assert(javaOutputOperationInfo.id === outputOperationInfo.id)
+    assert(javaOutputOperationInfo.name === outputOperationInfo.name)
+    assert(javaOutputOperationInfo.description === outputOperationInfo.description)
+    assert(javaOutputOperationInfo.startTime === outputOperationInfo.startTime.getOrElse(-1))
+    assert(javaOutputOperationInfo.endTime === outputOperationInfo.endTime.getOrElse(-1))
+    assert(javaOutputOperationInfo.failureReason === outputOperationInfo.failureReason.orNull)
+  }
+}
+
+class TestJavaStreamingListener extends JavaStreamingListener {
+
+  var receiverStarted: JavaStreamingListenerReceiverStarted = null
+  var receiverError: JavaStreamingListenerReceiverError = null
+  var receiverStopped: JavaStreamingListenerReceiverStopped = null
+  var batchSubmitted: JavaStreamingListenerBatchSubmitted = null
+  var batchStarted: JavaStreamingListenerBatchStarted = null
+  var batchCompleted: JavaStreamingListenerBatchCompleted = null
+  var outputOperationStarted: JavaStreamingListenerOutputOperationStarted = null
+  var outputOperationCompleted: JavaStreamingListenerOutputOperationCompleted = null
+
+  override def onReceiverStarted(receiverStarted: JavaStreamingListenerReceiverStarted): Unit = {
+    this.receiverStarted = receiverStarted
+  }
+
+  override def onReceiverError(receiverError: JavaStreamingListenerReceiverError): Unit = {
+    this.receiverError = receiverError
+  }
+
+  override def onReceiverStopped(receiverStopped: JavaStreamingListenerReceiverStopped): Unit = {
+    this.receiverStopped = receiverStopped
+  }
+
+  override def onBatchSubmitted(batchSubmitted: JavaStreamingListenerBatchSubmitted): Unit = {
+    this.batchSubmitted = batchSubmitted
+  }
+
+  override def onBatchStarted(batchStarted: JavaStreamingListenerBatchStarted): Unit = {
+    this.batchStarted = batchStarted
+  }
+
+  override def onBatchCompleted(batchCompleted: JavaStreamingListenerBatchCompleted): Unit = {
+    this.batchCompleted = batchCompleted
+  }
+
+  override def onOutputOperationStarted(
+      outputOperationStarted: JavaStreamingListenerOutputOperationStarted): Unit = {
+    this.outputOperationStarted = outputOperationStarted
+  }
+
+  override def onOutputOperationCompleted(
+      outputOperationCompleted: JavaStreamingListenerOutputOperationCompleted): Unit = {
+    this.outputOperationCompleted = outputOperationCompleted
+  }
+}

From 6502944f39893b9dfb472f8406d5f3a02a316eff Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Mon, 9 Nov 2015 18:13:37 -0800
Subject: [PATCH 587/896] [SPARK-11333][STREAMING] Add executorId to
 ReceiverInfo and display it in UI

Expose executorId to `ReceiverInfo` and UI since it's helpful when there are multiple executors running in the same host. Screenshot:

<img width="1058" alt="screen shot 2015-11-02 at 10 52 19 am" src="https://cloud.githubusercontent.com/assets/1000778/10890968/2e2f5512-8150-11e5-8d9d-746e826b69e8.png">

Author: Shixiong Zhu <shixiong@databricks.com>
Author: zsxwing <zsxwing@gmail.com>

Closes #9418 from zsxwing/SPARK-11333.
---
 .../spark/streaming/api/java/JavaStreamingListener.scala  | 1 +
 .../streaming/api/java/JavaStreamingListenerWrapper.scala | 1 +
 .../apache/spark/streaming/scheduler/ReceiverInfo.scala   | 1 +
 .../spark/streaming/scheduler/ReceiverTrackingInfo.scala  | 1 +
 .../org/apache/spark/streaming/ui/StreamingPage.scala     | 8 ++++++--
 .../spark/streaming/JavaStreamingListenerAPISuite.java    | 3 +++
 .../api/java/JavaStreamingListenerWrapperSuite.scala      | 8 ++++++--
 .../streaming/ui/StreamingJobProgressListenerSuite.scala  | 6 +++---
 8 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
index c86c7101ff6d..34429074fe80 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
@@ -140,6 +140,7 @@ private[streaming] case class JavaReceiverInfo(
     name: String,
     active: Boolean,
     location: String,
+    executorId: String,
     lastErrorMessage: String,
     lastError: String,
     lastErrorTime: Long)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
index 2c60b396a661..b109b9f1cbea 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapper.scala
@@ -33,6 +33,7 @@ private[streaming] class JavaStreamingListenerWrapper(javaStreamingListener: Jav
       receiverInfo.name,
       receiverInfo.active,
       receiverInfo.location,
+      receiverInfo.executorId,
       receiverInfo.lastErrorMessage,
       receiverInfo.lastError,
       receiverInfo.lastErrorTime
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverInfo.scala
index 59df892397fe..3b35964114c0 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverInfo.scala
@@ -30,6 +30,7 @@ case class ReceiverInfo(
     name: String,
     active: Boolean,
     location: String,
+    executorId: String,
     lastErrorMessage: String = "",
     lastError: String = "",
     lastErrorTime: Long = -1L
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
index ab0a84f05214..4dc5bb9c3bfb 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/ReceiverTrackingInfo.scala
@@ -49,6 +49,7 @@ private[streaming] case class ReceiverTrackingInfo(
     name.getOrElse(""),
     state == ReceiverState.ACTIVE,
     location = runningExecutor.map(_.host).getOrElse(""),
+    executorId = runningExecutor.map(_.executorId).getOrElse(""),
     lastErrorMessage = errorInfo.map(_.lastErrorMessage).getOrElse(""),
     lastError = errorInfo.map(_.lastError).getOrElse(""),
     lastErrorTime = errorInfo.map(_.lastErrorTime).getOrElse(-1L)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala
index 96d943e75d27..4588b2163cd4 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/StreamingPage.scala
@@ -402,7 +402,7 @@ private[ui] class StreamingPage(parent: StreamingTab)
         <tr>
           <th style="width: 151px;"></th>
           <th style="width: 167px; padding: 8px 0 8px 0"><div style="margin: 0 8px 0 8px">Status</div></th>
-          <th style="width: 167px; padding: 8px 0 8px 0"><div style="margin: 0 8px 0 8px">Location</div></th>
+          <th style="width: 167px; padding: 8px 0 8px 0"><div style="margin: 0 8px 0 8px">Executor ID / Host</div></th>
           <th style="width: 166px; padding: 8px 0 8px 0"><div style="margin: 0 8px 0 8px">Last Error Time</div></th>
           <th>Last Error Message</th>
         </tr>
@@ -430,7 +430,11 @@ private[ui] class StreamingPage(parent: StreamingTab)
     val receiverActive = receiverInfo.map { info =>
       if (info.active) "ACTIVE" else "INACTIVE"
     }.getOrElse(emptyCell)
-    val receiverLocation = receiverInfo.map(_.location).getOrElse(emptyCell)
+    val receiverLocation = receiverInfo.map { info =>
+      val executorId = if (info.executorId.isEmpty) emptyCell else info.executorId
+      val location = if (info.location.isEmpty) emptyCell else info.location
+      s"$executorId / $location"
+    }.getOrElse(emptyCell)
     val receiverLastError = receiverInfo.map { info =>
       val msg = s"${info.lastErrorMessage} - ${info.lastError}"
       if (msg.size > 100) msg.take(97) + "..." else msg
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
index 8cc285aa7fb3..67b2a0703e02 100644
--- a/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaStreamingListenerAPISuite.java
@@ -29,6 +29,7 @@ public void onReceiverStarted(JavaStreamingListenerReceiverStarted receiverStart
     receiverInfo.name();
     receiverInfo.active();
     receiverInfo.location();
+    receiverInfo.executorId();
     receiverInfo.lastErrorMessage();
     receiverInfo.lastError();
     receiverInfo.lastErrorTime();
@@ -41,6 +42,7 @@ public void onReceiverError(JavaStreamingListenerReceiverError receiverError) {
     receiverInfo.name();
     receiverInfo.active();
     receiverInfo.location();
+    receiverInfo.executorId();
     receiverInfo.lastErrorMessage();
     receiverInfo.lastError();
     receiverInfo.lastErrorTime();
@@ -53,6 +55,7 @@ public void onReceiverStopped(JavaStreamingListenerReceiverStopped receiverStopp
     receiverInfo.name();
     receiverInfo.active();
     receiverInfo.location();
+    receiverInfo.executorId();
     receiverInfo.lastErrorMessage();
     receiverInfo.lastError();
     receiverInfo.lastErrorTime();
diff --git a/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala b/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala
index 6d6d61e70caf..0295e059f7bc 100644
--- a/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala
+++ b/streaming/src/test/java/org/apache/spark/streaming/api/java/JavaStreamingListenerWrapperSuite.scala
@@ -33,7 +33,8 @@ class JavaStreamingListenerWrapperSuite extends SparkFunSuite {
       streamId = 2,
       name = "test",
       active = true,
-      location = "localhost"
+      location = "localhost",
+      executorId = "1"
     ))
     listenerWrapper.onReceiverStarted(receiverStarted)
     assertReceiverInfo(listener.receiverStarted.receiverInfo, receiverStarted.receiverInfo)
@@ -42,7 +43,8 @@ class JavaStreamingListenerWrapperSuite extends SparkFunSuite {
       streamId = 2,
       name = "test",
       active = false,
-      location = "localhost"
+      location = "localhost",
+      executorId = "1"
     ))
     listenerWrapper.onReceiverStopped(receiverStopped)
     assertReceiverInfo(listener.receiverStopped.receiverInfo, receiverStopped.receiverInfo)
@@ -52,6 +54,7 @@ class JavaStreamingListenerWrapperSuite extends SparkFunSuite {
       name = "test",
       active = false,
       location = "localhost",
+      executorId = "1",
       lastErrorMessage = "failed",
       lastError = "failed",
       lastErrorTime = System.currentTimeMillis()
@@ -197,6 +200,7 @@ class JavaStreamingListenerWrapperSuite extends SparkFunSuite {
     assert(javaReceiverInfo.name === receiverInfo.name)
     assert(javaReceiverInfo.active === receiverInfo.active)
     assert(javaReceiverInfo.location === receiverInfo.location)
+    assert(javaReceiverInfo.executorId === receiverInfo.executorId)
     assert(javaReceiverInfo.lastErrorMessage === receiverInfo.lastErrorMessage)
     assert(javaReceiverInfo.lastError === receiverInfo.lastError)
     assert(javaReceiverInfo.lastErrorTime === receiverInfo.lastErrorTime)
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
index af4718b4eb70..34cd7435569e 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ui/StreamingJobProgressListenerSuite.scala
@@ -130,20 +130,20 @@ class StreamingJobProgressListenerSuite extends TestSuiteBase with Matchers {
     listener.numTotalReceivedRecords should be (600)
 
     // onReceiverStarted
-    val receiverInfoStarted = ReceiverInfo(0, "test", true, "localhost")
+    val receiverInfoStarted = ReceiverInfo(0, "test", true, "localhost", "0")
     listener.onReceiverStarted(StreamingListenerReceiverStarted(receiverInfoStarted))
     listener.receiverInfo(0) should be (Some(receiverInfoStarted))
     listener.receiverInfo(1) should be (None)
 
     // onReceiverError
-    val receiverInfoError = ReceiverInfo(1, "test", true, "localhost")
+    val receiverInfoError = ReceiverInfo(1, "test", true, "localhost", "1")
     listener.onReceiverError(StreamingListenerReceiverError(receiverInfoError))
     listener.receiverInfo(0) should be (Some(receiverInfoStarted))
     listener.receiverInfo(1) should be (Some(receiverInfoError))
     listener.receiverInfo(2) should be (None)
 
     // onReceiverStopped
-    val receiverInfoStopped = ReceiverInfo(2, "test", true, "localhost")
+    val receiverInfoStopped = ReceiverInfo(2, "test", true, "localhost", "2")
     listener.onReceiverStopped(StreamingListenerReceiverStopped(receiverInfoStopped))
     listener.receiverInfo(0) should be (Some(receiverInfoStarted))
     listener.receiverInfo(1) should be (Some(receiverInfoError))

From 1431319e5bc46c7225a8edeeec482816d14a83b8 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Mon, 9 Nov 2015 18:53:57 -0800
Subject: [PATCH 588/896] Add mockito as an explicit test dependency to
 spark-streaming

While sbt successfully compiles as it properly pulls the mockito dependency, maven builds have broken. We need this in ASAP.
tdas

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9584 from brkyvz/fix-master.
---
 streaming/pom.xml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/streaming/pom.xml b/streaming/pom.xml
index 145c8a7321c0..435e16db13ab 100644
--- a/streaming/pom.xml
+++ b/streaming/pom.xml
@@ -93,6 +93,11 @@
       <artifactId>selenium-java</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>

From c4e19b3819df4cd7a1c495a00bd2844cf55f4dbd Mon Sep 17 00:00:00 2001
From: Shivaram Venkataraman <shivaram@cs.berkeley.edu>
Date: Mon, 9 Nov 2015 21:06:01 -0800
Subject: [PATCH 589/896] [SPARK-11587][SPARKR] Fix the summary generic to
 match base R

The signature is summary(object, ...) as defined in
https://stat.ethz.ch/R-manual/R-devel/library/base/html/summary.html

Author: Shivaram Venkataraman <shivaram@cs.berkeley.edu>

Closes #9582 from shivaram/summary-fix.
---
 R/pkg/R/DataFrame.R           |  6 +++---
 R/pkg/R/generics.R            |  2 +-
 R/pkg/R/mllib.R               | 12 ++++++------
 R/pkg/inst/tests/test_mllib.R |  6 ++++++
 4 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 44ce9414da5c..e9013aa34a84 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -1944,9 +1944,9 @@ setMethod("describe",
 #' @rdname summary
 #' @name summary
 setMethod("summary",
-          signature(x = "DataFrame"),
-          function(x) {
-            describe(x)
+          signature(object = "DataFrame"),
+          function(object, ...) {
+            describe(object)
           })
 
 
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 083d37fee28a..efef7d66b522 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -561,7 +561,7 @@ setGeneric("summarize", function(x,...) { standardGeneric("summarize") })
 
 #' @rdname summary
 #' @export
-setGeneric("summary", function(x, ...) { standardGeneric("summary") })
+setGeneric("summary", function(object, ...) { standardGeneric("summary") })
 
 # @rdname tojson
 # @export
diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index 7ff859741b4a..7126b7cde4bd 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -89,17 +89,17 @@ setMethod("predict", signature(object = "PipelineModel"),
 #' model <- glm(y ~ x, trainingData)
 #' summary(model)
 #'}
-setMethod("summary", signature(x = "PipelineModel"),
-          function(x, ...) {
+setMethod("summary", signature(object = "PipelineModel"),
+          function(object, ...) {
             modelName <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                   "getModelName", x@model)
+                                   "getModelName", object@model)
             features <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                   "getModelFeatures", x@model)
+                                   "getModelFeatures", object@model)
             coefficients <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                   "getModelCoefficients", x@model)
+                                   "getModelCoefficients", object@model)
             if (modelName == "LinearRegressionModel") {
               devianceResiduals <- callJStatic("org.apache.spark.ml.api.r.SparkRWrappers",
-                                               "getModelDevianceResiduals", x@model)
+                                               "getModelDevianceResiduals", object@model)
               devianceResiduals <- matrix(devianceResiduals, nrow = 1)
               colnames(devianceResiduals) <- c("Min", "Max")
               rownames(devianceResiduals) <- rep("", times = 1)
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 2606407bdcb4..42287ea19adc 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -113,3 +113,9 @@ test_that("summary coefficients match with native glm of family 'binomial'", {
     rownames(stats$Coefficients) ==
     c("(Intercept)", "Sepal_Length", "Sepal_Width")))
 })
+
+test_that("summary works on base GLM models", {
+  baseModel <- stats::glm(Sepal.Width ~ Sepal.Length + Species, data = iris)
+  baseSummary <- summary(baseModel)
+  expect_true(abs(baseSummary$deviance - 12.19313) < 1e-4)
+})

From d6cd3a18e720e8f6f1f307e0dffad3512952d997 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 9 Nov 2015 23:27:36 -0800
Subject: [PATCH 590/896] [SPARK-11599] [SQL] fix NPE when resolve Hive UDF in
 SQLParser

The DataFrame APIs that takes a SQL expression always use SQLParser, then the HiveFunctionRegistry will called outside of Hive state, cause NPE if there is not a active Session State for current thread (in PySpark).

cc rxin yhuai

Author: Davies Liu <davies@databricks.com>

Closes #9576 from davies/hive_udf.
---
 .../apache/spark/sql/hive/HiveContext.scala   | 10 +++++-
 .../sql/hive/execution/HiveQuerySuite.scala   | 33 ++++++++++++++-----
 2 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 2d72b959af13..c5f69657f529 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -454,7 +454,15 @@ class HiveContext private[hive](
   // Note that HiveUDFs will be overridden by functions registered in this context.
   @transient
   override protected[sql] lazy val functionRegistry: FunctionRegistry =
-    new HiveFunctionRegistry(FunctionRegistry.builtin.copy())
+    new HiveFunctionRegistry(FunctionRegistry.builtin.copy()) {
+      override def lookupFunction(name: String, children: Seq[Expression]): Expression = {
+        // Hive Registry need current database to lookup function
+        // TODO: the current database of executionHive should be consistent with metadataHive
+        executionHive.withHiveState {
+          super.lookupFunction(name, children)
+        }
+      }
+    }
 
   // The Hive UDF current_database() is foldable, will be evaluated by optimizer, but the optimizer
   // can't access the SessionState of metadataHive.
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index 78378c8b69c7..f0a7a6cc7a1e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -20,22 +20,19 @@ package org.apache.spark.sql.hive.execution
 import java.io.File
 import java.util.{Locale, TimeZone}
 
-import org.apache.spark.sql.execution.joins.BroadcastNestedLoopJoin
-
 import scala.util.Try
 
-import org.scalatest.BeforeAndAfter
-
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
+import org.scalatest.BeforeAndAfter
 
-import org.apache.spark.{SparkFiles, SparkException}
-import org.apache.spark.sql.{AnalysisException, DataFrame, Row}
 import org.apache.spark.sql.catalyst.expressions.Cast
 import org.apache.spark.sql.catalyst.plans.logical.Project
+import org.apache.spark.sql.execution.joins.BroadcastNestedLoopJoin
 import org.apache.spark.sql.hive._
-import org.apache.spark.sql.hive.test.TestHiveContext
-import org.apache.spark.sql.hive.test.TestHive
 import org.apache.spark.sql.hive.test.TestHive._
+import org.apache.spark.sql.hive.test.{TestHive, TestHiveContext}
+import org.apache.spark.sql.{AnalysisException, DataFrame, Row}
+import org.apache.spark.{SparkException, SparkFiles}
 
 case class TestData(a: Int, b: String)
 
@@ -1237,6 +1234,26 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
 
   }
 
+  test("lookup hive UDF in another thread") {
+    val e = intercept[AnalysisException] {
+      range(1).selectExpr("not_a_udf()")
+    }
+    assert(e.getMessage.contains("undefined function not_a_udf"))
+    var success = false
+    val t = new Thread("test") {
+      override def run(): Unit = {
+        val e = intercept[AnalysisException] {
+          range(1).selectExpr("not_a_udf()")
+        }
+        assert(e.getMessage.contains("undefined function not_a_udf"))
+        success = true
+      }
+    }
+    t.start()
+    t.join()
+    assert(success)
+  }
+
   createQueryTest("select from thrift based table",
     "SELECT * from src_thrift")
 

From 521b3cae118d1e22c170e2aad43f9baa162db55e Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 9 Nov 2015 23:28:32 -0800
Subject: [PATCH 591/896] [SPARK-11598] [SQL] enable tests for
 ShuffledHashOuterJoin

Author: Davies Liu <davies@databricks.com>

Closes #9573 from davies/join_condition.
---
 .../org/apache/spark/sql/JoinSuite.scala      | 435 ++++++++++--------
 1 file changed, 231 insertions(+), 204 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
index a9ca46cab067..3f3b837f7581 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
@@ -237,214 +237,241 @@ class JoinSuite extends QueryTest with SharedSQLContext {
         Row(2, 2, 2, 2) :: Nil)
   }
 
-  test("left outer join") {
-    checkAnswer(
-      upperCaseData.join(lowerCaseData, $"n" === $"N", "left"),
-      Row(1, "A", 1, "a") ::
-        Row(2, "B", 2, "b") ::
-        Row(3, "C", 3, "c") ::
-        Row(4, "D", 4, "d") ::
-        Row(5, "E", null, null) ::
-        Row(6, "F", null, null) :: Nil)
-
-    checkAnswer(
-      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"n" > 1, "left"),
-      Row(1, "A", null, null) ::
-        Row(2, "B", 2, "b") ::
-        Row(3, "C", 3, "c") ::
-        Row(4, "D", 4, "d") ::
-        Row(5, "E", null, null) ::
-        Row(6, "F", null, null) :: Nil)
-
-    checkAnswer(
-      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"N" > 1, "left"),
-      Row(1, "A", null, null) ::
-        Row(2, "B", 2, "b") ::
-        Row(3, "C", 3, "c") ::
-        Row(4, "D", 4, "d") ::
-        Row(5, "E", null, null) ::
-        Row(6, "F", null, null) :: Nil)
-
-    checkAnswer(
-      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"l" > $"L", "left"),
-      Row(1, "A", 1, "a") ::
-        Row(2, "B", 2, "b") ::
-        Row(3, "C", 3, "c") ::
-        Row(4, "D", 4, "d") ::
-        Row(5, "E", null, null) ::
-        Row(6, "F", null, null) :: Nil)
-
-    // Make sure we are choosing left.outputPartitioning as the
-    // outputPartitioning for the outer join operator.
-    checkAnswer(
-      sql(
-        """
-          |SELECT l.N, count(*)
-          |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
-          |GROUP BY l.N
-        """.stripMargin),
-      Row(1, 1) ::
-        Row(2, 1) ::
-        Row(3, 1) ::
-        Row(4, 1) ::
-        Row(5, 1) ::
-        Row(6, 1) :: Nil)
-
-    checkAnswer(
-      sql(
-        """
-          |SELECT r.a, count(*)
-          |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
-          |GROUP BY r.a
-        """.stripMargin),
-      Row(null, 6) :: Nil)
-  }
+  def test_outer_join(useSMJ: Boolean): Unit = {
+
+    val algo = if (useSMJ) "SortMergeOuterJoin" else "ShuffledHashOuterJoin"
+
+    test("left outer join: " + algo) {
+      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
+
+        checkAnswer(
+          upperCaseData.join(lowerCaseData, $"n" === $"N", "left"),
+          Row(1, "A", 1, "a") ::
+            Row(2, "B", 2, "b") ::
+            Row(3, "C", 3, "c") ::
+            Row(4, "D", 4, "d") ::
+            Row(5, "E", null, null) ::
+            Row(6, "F", null, null) :: Nil)
+
+        checkAnswer(
+          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"n" > 1, "left"),
+          Row(1, "A", null, null) ::
+            Row(2, "B", 2, "b") ::
+            Row(3, "C", 3, "c") ::
+            Row(4, "D", 4, "d") ::
+            Row(5, "E", null, null) ::
+            Row(6, "F", null, null) :: Nil)
+
+        checkAnswer(
+          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"N" > 1, "left"),
+          Row(1, "A", null, null) ::
+            Row(2, "B", 2, "b") ::
+            Row(3, "C", 3, "c") ::
+            Row(4, "D", 4, "d") ::
+            Row(5, "E", null, null) ::
+            Row(6, "F", null, null) :: Nil)
+
+        checkAnswer(
+          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"l" > $"L", "left"),
+          Row(1, "A", 1, "a") ::
+            Row(2, "B", 2, "b") ::
+            Row(3, "C", 3, "c") ::
+            Row(4, "D", 4, "d") ::
+            Row(5, "E", null, null) ::
+            Row(6, "F", null, null) :: Nil)
+
+        // Make sure we are choosing left.outputPartitioning as the
+        // outputPartitioning for the outer join operator.
+        checkAnswer(
+          sql(
+            """
+            |SELECT l.N, count(*)
+            |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
+            |GROUP BY l.N
+          """.
+              stripMargin),
+        Row(1, 1) ::
+          Row(2, 1) ::
+          Row(3, 1) ::
+          Row(4, 1) ::
+          Row(5, 1) ::
+          Row(6, 1) :: Nil)
+
+        checkAnswer(
+          sql(
+            """
+              |SELECT r.a, count(*)
+              |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
+              |GROUP BY r.a
+            """.stripMargin),
+          Row(null, 6) :: Nil)
+      }
+    }
 
-  test("right outer join") {
-    checkAnswer(
-      lowerCaseData.join(upperCaseData, $"n" === $"N", "right"),
-      Row(1, "a", 1, "A") ::
-        Row(2, "b", 2, "B") ::
-        Row(3, "c", 3, "C") ::
-        Row(4, "d", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-    checkAnswer(
-      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"n" > 1, "right"),
-      Row(null, null, 1, "A") ::
-        Row(2, "b", 2, "B") ::
-        Row(3, "c", 3, "C") ::
-        Row(4, "d", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-    checkAnswer(
-      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"N" > 1, "right"),
-      Row(null, null, 1, "A") ::
-        Row(2, "b", 2, "B") ::
-        Row(3, "c", 3, "C") ::
-        Row(4, "d", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-    checkAnswer(
-      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"l" > $"L", "right"),
-      Row(1, "a", 1, "A") ::
-        Row(2, "b", 2, "B") ::
-        Row(3, "c", 3, "C") ::
-        Row(4, "d", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-
-    // Make sure we are choosing right.outputPartitioning as the
-    // outputPartitioning for the outer join operator.
-    checkAnswer(
-      sql(
-        """
-          |SELECT l.a, count(*)
-          |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
-          |GROUP BY l.a
-        """.stripMargin),
-      Row(null, 6))
+    test("right outer join: " + algo) {
+      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
+        checkAnswer(
+          lowerCaseData.join(upperCaseData, $"n" === $"N", "right"),
+          Row(1, "a", 1, "A") ::
+            Row(2, "b", 2, "B") ::
+            Row(3, "c", 3, "C") ::
+            Row(4, "d", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+        checkAnswer(
+          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"n" > 1, "right"),
+          Row(null, null, 1, "A") ::
+            Row(2, "b", 2, "B") ::
+            Row(3, "c", 3, "C") ::
+            Row(4, "d", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+        checkAnswer(
+          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"N" > 1, "right"),
+          Row(null, null, 1, "A") ::
+            Row(2, "b", 2, "B") ::
+            Row(3, "c", 3, "C") ::
+            Row(4, "d", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+        checkAnswer(
+          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"l" > $"L", "right"),
+          Row(1, "a", 1, "A") ::
+            Row(2, "b", 2, "B") ::
+            Row(3, "c", 3, "C") ::
+            Row(4, "d", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+
+        // Make sure we are choosing right.outputPartitioning as the
+        // outputPartitioning for the outer join operator.
+        checkAnswer(
+          sql(
+            """
+              |SELECT l.a, count(*)
+              |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
+              |GROUP BY l.a
+            """.stripMargin),
+          Row(null,
+            6))
+
+        checkAnswer(
+          sql(
+            """
+              |SELECT r.N, count(*)
+              |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
+              |GROUP BY r.N
+            """.stripMargin),
+          Row(1
+            , 1) ::
+            Row(2, 1) ::
+            Row(3, 1) ::
+            Row(4, 1) ::
+            Row(5, 1) ::
+            Row(6, 1) :: Nil)
+        }
+      }
 
-    checkAnswer(
-      sql(
-        """
-          |SELECT r.N, count(*)
-          |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
-          |GROUP BY r.N
-        """.stripMargin),
-      Row(1, 1) ::
-        Row(2, 1) ::
-        Row(3, 1) ::
-        Row(4, 1) ::
-        Row(5, 1) ::
-        Row(6, 1) :: Nil)
+    test("full outer join: " + algo) {
+      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
+
+        upperCaseData.where('N <= 4).registerTempTable("left")
+        upperCaseData.where('N >= 3).registerTempTable("right")
+
+        val left = UnresolvedRelation(TableIdentifier("left"), None)
+        val right = UnresolvedRelation(TableIdentifier("right"), None)
+
+        checkAnswer(
+          left.join(right, $"left.N" === $"right.N", "full"),
+          Row(1, "A", null, null) ::
+            Row(2, "B", null, null) ::
+            Row(3, "C", 3, "C") ::
+            Row(4, "D", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+
+        checkAnswer(
+          left.join(right, ($"left.N" === $"right.N") && ($"left.N" !== 3), "full"),
+          Row(1, "A", null, null) ::
+            Row(2, "B", null, null) ::
+            Row(3, "C", null, null) ::
+            Row(null, null, 3, "C") ::
+            Row(4, "D", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+
+        checkAnswer(
+          left.join(right, ($"left.N" === $"right.N") && ($"right.N" !== 3), "full"),
+          Row(1, "A", null, null) ::
+            Row(2, "B", null, null) ::
+            Row(3, "C", null, null) ::
+            Row(null, null, 3, "C") ::
+            Row(4, "D", 4, "D") ::
+            Row(null, null, 5, "E") ::
+            Row(null, null, 6, "F") :: Nil)
+
+        // Make sure we are UnknownPartitioning as the outputPartitioning for the outer join
+        // operator.
+        checkAnswer(
+          sql(
+            """
+            |SELECT l.a, count(*)
+            |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
+            |GROUP BY l.a
+          """.
+              stripMargin),
+        Row(
+          null, 10))
+
+        checkAnswer(
+          sql(
+            """
+              |SELECT r.N, count(*)
+              |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
+              |GROUP BY r.N
+            """.stripMargin),
+          Row
+            (1, 1) ::
+            Row(2, 1) ::
+            Row(3, 1) ::
+            Row(4, 1) ::
+            Row(5, 1) ::
+            Row(6, 1) ::
+            Row(null, 4) :: Nil)
+
+        checkAnswer(
+          sql(
+            """
+              |SELECT l.N, count(*)
+              |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
+              |GROUP BY l.N
+            """.stripMargin),
+          Row(1
+            , 1) ::
+            Row(2, 1) ::
+            Row(3, 1) ::
+            Row(4, 1) ::
+            Row(5, 1) ::
+            Row(6, 1) ::
+            Row(null, 4) :: Nil)
+
+        checkAnswer(
+          sql(
+            """
+            |SELECT r.a, count(*)
+            |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
+            |GROUP BY r.a
+          """.
+              stripMargin),
+          Row(null, 10))
+      }
+    }
   }
 
-  test("full outer join") {
-    upperCaseData.where('N <= 4).registerTempTable("left")
-    upperCaseData.where('N >= 3).registerTempTable("right")
-
-    val left = UnresolvedRelation(TableIdentifier("left"), None)
-    val right = UnresolvedRelation(TableIdentifier("right"), None)
-
-    checkAnswer(
-      left.join(right, $"left.N" === $"right.N", "full"),
-      Row(1, "A", null, null) ::
-        Row(2, "B", null, null) ::
-        Row(3, "C", 3, "C") ::
-        Row(4, "D", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-
-    checkAnswer(
-      left.join(right, ($"left.N" === $"right.N") && ($"left.N" !== 3), "full"),
-      Row(1, "A", null, null) ::
-        Row(2, "B", null, null) ::
-        Row(3, "C", null, null) ::
-        Row(null, null, 3, "C") ::
-        Row(4, "D", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-
-    checkAnswer(
-      left.join(right, ($"left.N" === $"right.N") && ($"right.N" !== 3), "full"),
-      Row(1, "A", null, null) ::
-        Row(2, "B", null, null) ::
-        Row(3, "C", null, null) ::
-        Row(null, null, 3, "C") ::
-        Row(4, "D", 4, "D") ::
-        Row(null, null, 5, "E") ::
-        Row(null, null, 6, "F") :: Nil)
-
-    // Make sure we are UnknownPartitioning as the outputPartitioning for the outer join operator.
-    checkAnswer(
-      sql(
-        """
-          |SELECT l.a, count(*)
-          |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
-          |GROUP BY l.a
-        """.stripMargin),
-      Row(null, 10))
-
-    checkAnswer(
-      sql(
-        """
-          |SELECT r.N, count(*)
-          |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
-          |GROUP BY r.N
-        """.stripMargin),
-      Row(1, 1) ::
-        Row(2, 1) ::
-        Row(3, 1) ::
-        Row(4, 1) ::
-        Row(5, 1) ::
-        Row(6, 1) ::
-        Row(null, 4) :: Nil)
-
-    checkAnswer(
-      sql(
-        """
-          |SELECT l.N, count(*)
-          |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
-          |GROUP BY l.N
-        """.stripMargin),
-      Row(1, 1) ::
-        Row(2, 1) ::
-        Row(3, 1) ::
-        Row(4, 1) ::
-        Row(5, 1) ::
-        Row(6, 1) ::
-        Row(null, 4) :: Nil)
-
-    checkAnswer(
-      sql(
-        """
-          |SELECT r.a, count(*)
-          |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
-          |GROUP BY r.a
-        """.stripMargin),
-      Row(null, 10))
-  }
+  // test SortMergeOuterJoin
+  test_outer_join(true)
+  // test ShuffledHashOuterJoin
+  test_outer_join(false)
 
   test("broadcasted left semi join operator selection") {
     sqlContext.cacheManager.clearCache()

From 5507a9d0935aa42d65c3a4fa65da680b5af14faf Mon Sep 17 00:00:00 2001
From: Paul Chandler <pestilence669@users.noreply.github.com>
Date: Tue, 10 Nov 2015 12:59:53 +0100
Subject: [PATCH 592/896] Fix typo in driver page

"Comamnd property" => "Command property"

Author: Paul Chandler <pestilence669@users.noreply.github.com>

Closes #9578 from pestilence669/fix_spelling.
---
 .../scala/org/apache/spark/deploy/mesos/ui/DriverPage.scala     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/mesos/ui/DriverPage.scala b/core/src/main/scala/org/apache/spark/deploy/mesos/ui/DriverPage.scala
index e8ef60bd5428..bc67fd460d9a 100644
--- a/core/src/main/scala/org/apache/spark/deploy/mesos/ui/DriverPage.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/mesos/ui/DriverPage.scala
@@ -46,7 +46,7 @@ private[ui] class DriverPage(parent: MesosClusterUI) extends WebUIPage("driver")
     val schedulerHeaders = Seq("Scheduler property", "Value")
     val commandEnvHeaders = Seq("Command environment variable", "Value")
     val launchedHeaders = Seq("Launched property", "Value")
-    val commandHeaders = Seq("Comamnd property", "Value")
+    val commandHeaders = Seq("Command property", "Value")
     val retryHeaders = Seq("Last failed status", "Next retry time", "Retry count")
     val driverDescription = Iterable.apply(driverState.description)
     val submissionState = Iterable.apply(driverState.submissionState)

From a81f47ff7498e7063c855ccf75bba81ab101b43e Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Tue, 10 Nov 2015 10:05:53 -0800
Subject: [PATCH 593/896] [SPARK-11382] Replace example code in
 mllib-decision-tree.md using include_example

https://issues.apache.org/jira/browse/SPARK-11382

B.T.W. I fix an error in naive_bayes_example.py.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9596 from yinxusen/SPARK-11382.
---
 docs/mllib-decision-tree.md                   | 253 +-----------------
 ...JavaDecisionTreeClassificationExample.java |  91 +++++++
 .../JavaDecisionTreeRegressionExample.java    |  96 +++++++
 .../decision_tree_classification_example.py   |  55 ++++
 .../mllib/decision_tree_regression_example.py |  56 ++++
 .../main/python/mllib/naive_bayes_example.py  |   1 +
 .../DecisionTreeClassificationExample.scala   |  67 +++++
 .../mllib/DecisionTreeRegressionExample.scala |  66 +++++
 8 files changed, 438 insertions(+), 247 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeClassificationExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeRegressionExample.java
 create mode 100644 examples/src/main/python/mllib/decision_tree_classification_example.py
 create mode 100644 examples/src/main/python/mllib/decision_tree_regression_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeClassificationExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRegressionExample.scala

diff --git a/docs/mllib-decision-tree.md b/docs/mllib-decision-tree.md
index b5b454bc6924..77ce34e91af3 100644
--- a/docs/mllib-decision-tree.md
+++ b/docs/mllib-decision-tree.md
@@ -194,137 +194,19 @@ maximum tree depth of 5. The test error is calculated to measure the algorithm a
 <div data-lang="scala" markdown="1">
 Refer to the [`DecisionTree` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.DecisionTreeModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.DecisionTree
-import org.apache.spark.mllib.tree.model.DecisionTreeModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a DecisionTree model.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-val numClasses = 2
-val categoricalFeaturesInfo = Map[Int, Int]()
-val impurity = "gini"
-val maxDepth = 5
-val maxBins = 32
-
-val model = DecisionTree.trainClassifier(trainingData, numClasses, categoricalFeaturesInfo,
-  impurity, maxDepth, maxBins)
-
-// Evaluate model on test instances and compute test error
-val labelAndPreds = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testErr = labelAndPreds.filter(r => r._1 != r._2).count.toDouble / testData.count()
-println("Test Error = " + testErr)
-println("Learned classification tree model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = DecisionTreeModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/DecisionTreeClassificationExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`DecisionTree` Java docs](api/java/org/apache/spark/mllib/tree/DecisionTree.html) and [`DecisionTreeModel` Java docs](api/java/org/apache/spark/mllib/tree/model/DecisionTreeModel.html) for details on the API.
 
-{% highlight java %}
-import java.util.HashMap;
-import scala.Tuple2;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.DecisionTree;
-import org.apache.spark.mllib.tree.model.DecisionTreeModel;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.SparkConf;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaDecisionTree");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Set parameters.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Integer numClasses = 2;
-Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-String impurity = "gini";
-Integer maxDepth = 5;
-Integer maxBins = 32;
-
-// Train a DecisionTree model for classification.
-final DecisionTreeModel model = DecisionTree.trainClassifier(trainingData, numClasses,
-  categoricalFeaturesInfo, impurity, maxDepth, maxBins);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testErr =
-  1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
-    @Override
-    public Boolean call(Tuple2<Double, Double> pl) {
-      return !pl._1().equals(pl._2());
-    }
-  }).count() / testData.count();
-System.out.println("Test Error: " + testErr);
-System.out.println("Learned classification tree model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-DecisionTreeModel sameModel = DecisionTreeModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaDecisionTreeClassificationExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`DecisionTree` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTreeModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.regression import LabeledPoint
-from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file into an RDD of LabeledPoint.
-data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a DecisionTree model.
-#  Empty categoricalFeaturesInfo indicates all features are continuous.
-model = DecisionTree.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
-                                     impurity='gini', maxDepth=5, maxBins=32)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
-print('Test Error = ' + str(testErr))
-print('Learned classification tree model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = DecisionTreeModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/decision_tree_classification_example.py %}
 </div>
 
 </div>
@@ -343,142 +225,19 @@ depth of 5. The Mean Squared Error (MSE) is computed at the end to evaluate
 <div data-lang="scala" markdown="1">
 Refer to the [`DecisionTree` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.DecisionTreeModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.DecisionTree
-import org.apache.spark.mllib.tree.model.DecisionTreeModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a DecisionTree model.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-val categoricalFeaturesInfo = Map[Int, Int]()
-val impurity = "variance"
-val maxDepth = 5
-val maxBins = 32
-
-val model = DecisionTree.trainRegressor(trainingData, categoricalFeaturesInfo, impurity,
-  maxDepth, maxBins)
-
-// Evaluate model on test instances and compute test error
-val labelsAndPredictions = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testMSE = labelsAndPredictions.map{ case(v, p) => math.pow((v - p), 2)}.mean()
-println("Test Mean Squared Error = " + testMSE)
-println("Learned regression tree model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = DecisionTreeModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/DecisionTreeRegressionExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`DecisionTree` Java docs](api/java/org/apache/spark/mllib/tree/DecisionTree.html) and [`DecisionTreeModel` Java docs](api/java/org/apache/spark/mllib/tree/model/DecisionTreeModel.html) for details on the API.
 
-{% highlight java %}
-import java.util.HashMap;
-import scala.Tuple2;
-import org.apache.spark.api.java.function.Function2;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.DecisionTree;
-import org.apache.spark.mllib.tree.model.DecisionTreeModel;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.SparkConf;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaDecisionTree");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Set parameters.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-String impurity = "variance";
-Integer maxDepth = 5;
-Integer maxBins = 32;
-
-// Train a DecisionTree model.
-final DecisionTreeModel model = DecisionTree.trainRegressor(trainingData,
-  categoricalFeaturesInfo, impurity, maxDepth, maxBins);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testMSE =
-  predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
-    @Override
-    public Double call(Tuple2<Double, Double> pl) {
-      Double diff = pl._1() - pl._2();
-      return diff * diff;
-    }
-  }).reduce(new Function2<Double, Double, Double>() {
-    @Override
-    public Double call(Double a, Double b) {
-      return a + b;
-    }
-  }) / testData.count();
-System.out.println("Test Mean Squared Error: " + testMSE);
-System.out.println("Learned regression tree model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-DecisionTreeModel sameModel = DecisionTreeModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaDecisionTreeRegressionExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`DecisionTree` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTree) and [`DecisionTreeModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.DecisionTreeModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.regression import LabeledPoint
-from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file into an RDD of LabeledPoint.
-data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a DecisionTree model.
-#  Empty categoricalFeaturesInfo indicates all features are continuous.
-model = DecisionTree.trainRegressor(trainingData, categoricalFeaturesInfo={},
-                                    impurity='variance', maxDepth=5, maxBins=32)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() / float(testData.count())
-print('Test Mean Squared Error = ' + str(testMSE))
-print('Learned regression tree model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = DecisionTreeModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/decision_tree_regression_example.py %}
 </div>
 
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeClassificationExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeClassificationExample.java
new file mode 100644
index 000000000000..5839b0cf8a8f
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeClassificationExample.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+import java.util.Map;
+
+import scala.Tuple2;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.DecisionTree;
+import org.apache.spark.mllib.tree.model.DecisionTreeModel;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+
+class JavaDecisionTreeClassificationExample {
+
+  public static void main(String[] args) {
+
+    // $example on$
+    SparkConf sparkConf = new SparkConf().setAppName("JavaDecisionTreeClassificationExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Set parameters.
+    //  Empty categoricalFeaturesInfo indicates all features are continuous.
+    Integer numClasses = 2;
+    Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    String impurity = "gini";
+    Integer maxDepth = 5;
+    Integer maxBins = 32;
+
+    // Train a DecisionTree model for classification.
+    final DecisionTreeModel model = DecisionTree.trainClassifier(trainingData, numClasses,
+      categoricalFeaturesInfo, impurity, maxDepth, maxBins);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    Double testErr =
+      1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
+        @Override
+        public Boolean call(Tuple2<Double, Double> pl) {
+          return !pl._1().equals(pl._2());
+        }
+      }).count() / testData.count();
+
+    System.out.println("Test Error: " + testErr);
+    System.out.println("Learned classification tree model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myDecisionTreeClassificationModel");
+    DecisionTreeModel sameModel = DecisionTreeModel
+      .load(jsc.sc(), "target/tmp/myDecisionTreeClassificationModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeRegressionExample.java
new file mode 100644
index 000000000000..ccde578249f7
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaDecisionTreeRegressionExample.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+import java.util.Map;
+
+import scala.Tuple2;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.DecisionTree;
+import org.apache.spark.mllib.tree.model.DecisionTreeModel;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+
+class JavaDecisionTreeRegressionExample {
+
+  public static void main(String[] args) {
+
+    // $example on$
+    SparkConf sparkConf = new SparkConf().setAppName("JavaDecisionTreeRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Set parameters.
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    String impurity = "variance";
+    Integer maxDepth = 5;
+    Integer maxBins = 32;
+
+    // Train a DecisionTree model.
+    final DecisionTreeModel model = DecisionTree.trainRegressor(trainingData,
+      categoricalFeaturesInfo, impurity, maxDepth, maxBins);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+      @Override
+      public Tuple2<Double, Double> call(LabeledPoint p) {
+        return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+      }
+    });
+    Double testMSE =
+      predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
+        @Override
+        public Double call(Tuple2<Double, Double> pl) {
+          Double diff = pl._1() - pl._2();
+          return diff * diff;
+        }
+      }).reduce(new Function2<Double, Double, Double>() {
+        @Override
+        public Double call(Double a, Double b) {
+          return a + b;
+        }
+      }) / data.count();
+    System.out.println("Test Mean Squared Error: " + testMSE);
+    System.out.println("Learned regression tree model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myDecisionTreeRegressionModel");
+    DecisionTreeModel sameModel = DecisionTreeModel
+      .load(jsc.sc(), "target/tmp/myDecisionTreeRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/decision_tree_classification_example.py b/examples/src/main/python/mllib/decision_tree_classification_example.py
new file mode 100644
index 000000000000..1b529768b6c6
--- /dev/null
+++ b/examples/src/main/python/mllib/decision_tree_classification_example.py
@@ -0,0 +1,55 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Decision Tree Classification Example.
+"""
+from __future__ import print_function
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+
+    sc = SparkContext(appName="PythonDecisionTreeClassificationExample")
+
+    # $example on$
+    # Load and parse the data file into an RDD of LabeledPoint.
+    data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a DecisionTree model.
+    #  Empty categoricalFeaturesInfo indicates all features are continuous.
+    model = DecisionTree.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
+                                         impurity='gini', maxDepth=5, maxBins=32)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
+    print('Test Error = ' + str(testErr))
+    print('Learned classification tree model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myDecisionTreeClassificationModel")
+    sameModel = DecisionTreeModel.load(sc, "target/tmp/myDecisionTreeClassificationModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/decision_tree_regression_example.py b/examples/src/main/python/mllib/decision_tree_regression_example.py
new file mode 100644
index 000000000000..cf518eac67e8
--- /dev/null
+++ b/examples/src/main/python/mllib/decision_tree_regression_example.py
@@ -0,0 +1,56 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Decision Tree Regression Example.
+"""
+from __future__ import print_function
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import DecisionTree, DecisionTreeModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+
+    sc = SparkContext(appName="PythonDecisionTreeRegressionExample")
+
+    # $example on$
+    # Load and parse the data file into an RDD of LabeledPoint.
+    data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a DecisionTree model.
+    #  Empty categoricalFeaturesInfo indicates all features are continuous.
+    model = DecisionTree.trainRegressor(trainingData, categoricalFeaturesInfo={},
+                                        impurity='variance', maxDepth=5, maxBins=32)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() /\
+        float(testData.count())
+    print('Test Mean Squared Error = ' + str(testMSE))
+    print('Learned regression tree model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myDecisionTreeRegressionModel")
+    sameModel = DecisionTreeModel.load(sc, "target/tmp/myDecisionTreeRegressionModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/naive_bayes_example.py b/examples/src/main/python/mllib/naive_bayes_example.py
index a2e7dacf2549..f5e120c678fc 100644
--- a/examples/src/main/python/mllib/naive_bayes_example.py
+++ b/examples/src/main/python/mllib/naive_bayes_example.py
@@ -20,6 +20,7 @@
 """
 from __future__ import print_function
 
+from pyspark import SparkContext
 # $example on$
 from pyspark.mllib.classification import NaiveBayes, NaiveBayesModel
 from pyspark.mllib.linalg import Vectors
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeClassificationExample.scala
new file mode 100644
index 000000000000..d427bbadaa0c
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeClassificationExample.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.tree.DecisionTree
+import org.apache.spark.mllib.tree.model.DecisionTreeModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+import org.apache.spark.{SparkConf, SparkContext}
+
+object DecisionTreeClassificationExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("DecisionTreeClassificationExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a DecisionTree model.
+    //  Empty categoricalFeaturesInfo indicates all features are continuous.
+    val numClasses = 2
+    val categoricalFeaturesInfo = Map[Int, Int]()
+    val impurity = "gini"
+    val maxDepth = 5
+    val maxBins = 32
+
+    val model = DecisionTree.trainClassifier(trainingData, numClasses, categoricalFeaturesInfo,
+      impurity, maxDepth, maxBins)
+
+    // Evaluate model on test instances and compute test error
+    val labelAndPreds = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testErr = labelAndPreds.filter(r => r._1 != r._2).count().toDouble / testData.count()
+    println("Test Error = " + testErr)
+    println("Learned classification tree model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myDecisionTreeClassificationModel")
+    val sameModel = DecisionTreeModel.load(sc, "target/tmp/myDecisionTreeClassificationModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRegressionExample.scala
new file mode 100644
index 000000000000..fb05e7d9c506
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/DecisionTreeRegressionExample.scala
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.tree.DecisionTree
+import org.apache.spark.mllib.tree.model.DecisionTreeModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+import org.apache.spark.{SparkConf, SparkContext}
+
+object DecisionTreeRegressionExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("DecisionTreeRegressionExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a DecisionTree model.
+    //  Empty categoricalFeaturesInfo indicates all features are continuous.
+    val categoricalFeaturesInfo = Map[Int, Int]()
+    val impurity = "variance"
+    val maxDepth = 5
+    val maxBins = 32
+
+    val model = DecisionTree.trainRegressor(trainingData, categoricalFeaturesInfo, impurity,
+      maxDepth, maxBins)
+
+    // Evaluate model on test instances and compute test error
+    val labelsAndPredictions = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testMSE = labelsAndPredictions.map{ case (v, p) => math.pow(v - p, 2) }.mean()
+    println("Test Mean Squared Error = " + testMSE)
+    println("Learned regression tree model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myDecisionTreeRegressionModel")
+    val sameModel = DecisionTreeModel.load(sc, "target/tmp/myDecisionTreeRegressionModel")
+    // $example off$
+  }
+}
+// scalastyle:on println

From 689386b1c60997e4505749915f7005a52c207de2 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 10 Nov 2015 10:14:19 -0800
Subject: [PATCH 594/896] [SPARK-7841][BUILD] Stop using retrieveManaged to
 retrieve dependencies in SBT

This patch modifies Spark's SBT build so that it no longer uses `retrieveManaged` / `lib_managed` to store its dependencies. The motivations for this change are nicely described on the JIRA ticket ([SPARK-7841](https://issues.apache.org/jira/browse/SPARK-7841)); my personal interest in doing this stems from the fact that `lib_managed` has caused me some pain while debugging dependency issues in another PR of mine.

Removing our use of `lib_managed` would be trivial except for one snag: the Datanucleus JARs, required by Spark SQL's Hive integration, cannot be included in assembly JARs due to problems with merging OSGI `plugin.xml` files. As a result, several places in the packaging and deployment pipeline assume that these Datanucleus JARs are copied to `lib_managed/jars`. In the interest of maintaining compatibility, I have chosen to retain the `lib_managed/jars` directory _only_ for these Datanucleus JARs and have added custom code to `SparkBuild.scala` to automatically copy those JARs to that folder as part of the `assembly` task.

`dev/mima` also depended on `lib_managed` in a hacky way in order to set classpaths when generating MiMa excludes; I've updated this to obtain the classpaths directly from SBT instead.

/cc dragos marmbrus pwendell srowen

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9575 from JoshRosen/SPARK-7841.
---
 dev/mima                 |  2 +-
 project/SparkBuild.scala | 22 +++++++++++++++++-----
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/dev/mima b/dev/mima
index 2952fa65d42f..d5baffc6ef8a 100755
--- a/dev/mima
+++ b/dev/mima
@@ -38,7 +38,7 @@ generate_mima_ignore() {
 # it did not process the new classes (which are in assembly jar).
 generate_mima_ignore
 
-export SPARK_CLASSPATH="`find lib_managed \( -name '*spark*jar' -a -type f \) | tr "\\n" ":"`"
+export SPARK_CLASSPATH="$(build/sbt "export oldDeps/fullClasspath" | tail -n1)"
 echo "SPARK_CLASSPATH=$SPARK_CLASSPATH"
 
 generate_mima_ignore
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index b75ed13a78c6..a9fb741d7593 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -16,6 +16,7 @@
  */
 
 import java.io._
+import java.nio.file.Files
 
 import scala.util.Properties
 import scala.collection.JavaConverters._
@@ -135,8 +136,6 @@ object SparkBuild extends PomBuild {
       .orElse(sys.props.get("java.home").map { p => new File(p).getParentFile().getAbsolutePath() })
       .map(file),
     incOptions := incOptions.value.withNameHashing(true),
-    retrieveManaged := true,
-    retrievePattern := "[type]s/[artifact](-[revision])(-[classifier]).[ext]",
     publishMavenStyle := true,
     unidocGenjavadocVersion := "0.9-spark0",
 
@@ -326,8 +325,6 @@ object OldDeps {
   def oldDepsSettings() = Defaults.coreDefaultSettings ++ Seq(
     name := "old-deps",
     scalaVersion := "2.10.5",
-    retrieveManaged := true,
-    retrievePattern := "[type]s/[artifact](-[revision])(-[classifier]).[ext]",
     libraryDependencies := Seq("spark-streaming-mqtt", "spark-streaming-zeromq",
       "spark-streaming-flume", "spark-streaming-kafka", "spark-streaming-twitter",
       "spark-streaming", "spark-mllib", "spark-bagel", "spark-graphx",
@@ -404,6 +401,8 @@ object Assembly {
 
   val hadoopVersion = taskKey[String]("The version of hadoop that spark is compiled against.")
 
+  val deployDatanucleusJars = taskKey[Unit]("Deploy datanucleus jars to the spark/lib_managed/jars directory")
+
   lazy val settings = assemblySettings ++ Seq(
     test in assembly := {},
     hadoopVersion := {
@@ -429,7 +428,20 @@ object Assembly {
       case m if m.toLowerCase.startsWith("meta-inf/services/") => MergeStrategy.filterDistinctLines
       case "reference.conf"                                    => MergeStrategy.concat
       case _                                                   => MergeStrategy.first
-    }
+    },
+    deployDatanucleusJars := {
+      val jars: Seq[File] = (fullClasspath in assembly).value.map(_.data)
+        .filter(_.getPath.contains("org.datanucleus"))
+      var libManagedJars = new File(BuildCommons.sparkHome, "lib_managed/jars")
+      libManagedJars.mkdirs()
+      jars.foreach { jar =>
+        val dest = new File(libManagedJars, jar.getName)
+        if (!dest.exists()) {
+          Files.copy(jar.toPath, dest.toPath)
+        }
+      }
+    },
+    assembly <<= assembly.dependsOn(deployDatanucleusJars)
   )
 }
 

From 6e5fc37883ed81c3ee2338145a48de3036d19399 Mon Sep 17 00:00:00 2001
From: Lianhui Wang <lianhuiwang09@gmail.com>
Date: Tue, 10 Nov 2015 10:40:08 -0800
Subject: [PATCH 595/896] [SPARK-11252][NETWORK] ShuffleClient should release
 connection after fetching blocks had been completed for external shuffle

with yarn's external shuffle, ExternalShuffleClient of executors reserve its connections for yarn's NodeManager until application has been completed. so it will make NodeManager and executors have many socket connections.
in order to reduce network pressure of NodeManager's shuffleService, after registerWithShuffleServer or fetchBlocks have been completed in ExternalShuffleClient, connection for NM's shuffleService needs to be closed.andrewor14 rxin vanzin

Author: Lianhui Wang <lianhuiwang09@gmail.com>

Closes #9227 from lianhuiwang/spark-11252.
---
 .../spark/deploy/ExternalShuffleService.scala |  3 +-
 .../spark/network/TransportContext.java       | 11 +++++-
 .../client/TransportClientFactory.java        | 10 ++++++
 .../server/TransportChannelHandler.java       | 26 +++++++++-----
 .../network/TransportClientFactorySuite.java  | 34 +++++++++++++++++++
 .../shuffle/ExternalShuffleClient.java        | 12 ++++---
 6 files changed, 81 insertions(+), 15 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala b/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
index 6840a3ae831f..a039d543c35e 100644
--- a/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
@@ -47,7 +47,8 @@ class ExternalShuffleService(sparkConf: SparkConf, securityManager: SecurityMana
 
   private val transportConf = SparkTransportConf.fromSparkConf(sparkConf, numUsableCores = 0)
   private val blockHandler = newShuffleBlockHandler(transportConf)
-  private val transportContext: TransportContext = new TransportContext(transportConf, blockHandler)
+  private val transportContext: TransportContext =
+    new TransportContext(transportConf, blockHandler, true)
 
   private var server: TransportServer = _
 
diff --git a/network/common/src/main/java/org/apache/spark/network/TransportContext.java b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
index 43900e6f2c97..1b64b863a9fe 100644
--- a/network/common/src/main/java/org/apache/spark/network/TransportContext.java
+++ b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
@@ -59,15 +59,24 @@ public class TransportContext {
 
   private final TransportConf conf;
   private final RpcHandler rpcHandler;
+  private final boolean closeIdleConnections;
 
   private final MessageEncoder encoder;
   private final MessageDecoder decoder;
 
   public TransportContext(TransportConf conf, RpcHandler rpcHandler) {
+    this(conf, rpcHandler, false);
+  }
+
+  public TransportContext(
+      TransportConf conf,
+      RpcHandler rpcHandler,
+      boolean closeIdleConnections) {
     this.conf = conf;
     this.rpcHandler = rpcHandler;
     this.encoder = new MessageEncoder();
     this.decoder = new MessageDecoder();
+    this.closeIdleConnections = closeIdleConnections;
   }
 
   /**
@@ -144,7 +153,7 @@ private TransportChannelHandler createChannelHandler(Channel channel, RpcHandler
     TransportRequestHandler requestHandler = new TransportRequestHandler(channel, client,
       rpcHandler);
     return new TransportChannelHandler(client, responseHandler, requestHandler,
-      conf.connectionTimeoutMs());
+      conf.connectionTimeoutMs(), closeIdleConnections);
   }
 
   public TransportConf getConf() { return conf; }
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
index 4952ffb44bb8..42a4f664e697 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
@@ -158,6 +158,16 @@ public TransportClient createClient(String remoteHost, int remotePort) throws IO
     }
   }
 
+  /**
+   * Create a completely new {@link TransportClient} to the given remote host / port
+   * But this connection is not pooled.
+   */
+  public TransportClient createUnmanagedClient(String remoteHost, int remotePort)
+      throws IOException {
+    final InetSocketAddress address = new InetSocketAddress(remoteHost, remotePort);
+    return createClient(address);
+  }
+
   /** Create a completely new {@link TransportClient} to the remote address. */
   private TransportClient createClient(InetSocketAddress address) throws IOException {
     logger.debug("Creating new connection to " + address);
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
index 8e0ee709e38e..f8fcd1c3d7d7 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
@@ -55,16 +55,19 @@ public class TransportChannelHandler extends SimpleChannelInboundHandler<Message
   private final TransportResponseHandler responseHandler;
   private final TransportRequestHandler requestHandler;
   private final long requestTimeoutNs;
+  private final boolean closeIdleConnections;
 
   public TransportChannelHandler(
       TransportClient client,
       TransportResponseHandler responseHandler,
       TransportRequestHandler requestHandler,
-      long requestTimeoutMs) {
+      long requestTimeoutMs,
+      boolean closeIdleConnections) {
     this.client = client;
     this.responseHandler = responseHandler;
     this.requestHandler = requestHandler;
     this.requestTimeoutNs = requestTimeoutMs * 1000L * 1000;
+    this.closeIdleConnections = closeIdleConnections;
   }
 
   public TransportClient getClient() {
@@ -111,16 +114,21 @@ public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exc
       IdleStateEvent e = (IdleStateEvent) evt;
       // See class comment for timeout semantics. In addition to ensuring we only timeout while
       // there are outstanding requests, we also do a secondary consistency check to ensure
-      // there's no race between the idle timeout and incrementing the numOutstandingRequests.
-      boolean hasInFlightRequests = responseHandler.numOutstandingRequests() > 0;
+      // there's no race between the idle timeout and incrementing the numOutstandingRequests
+      // (see SPARK-7003).
       boolean isActuallyOverdue =
         System.nanoTime() - responseHandler.getTimeOfLastRequestNs() > requestTimeoutNs;
-      if (e.state() == IdleState.ALL_IDLE && hasInFlightRequests && isActuallyOverdue) {
-        String address = NettyUtils.getRemoteAddress(ctx.channel());
-        logger.error("Connection to {} has been quiet for {} ms while there are outstanding " +
-          "requests. Assuming connection is dead; please adjust spark.network.timeout if this " +
-          "is wrong.", address, requestTimeoutNs / 1000 / 1000);
-        ctx.close();
+      if (e.state() == IdleState.ALL_IDLE && isActuallyOverdue) {
+        if (responseHandler.numOutstandingRequests() > 0) {
+          String address = NettyUtils.getRemoteAddress(ctx.channel());
+          logger.error("Connection to {} has been quiet for {} ms while there are outstanding " +
+            "requests. Assuming connection is dead; please adjust spark.network.timeout if this " +
+            "is wrong.", address, requestTimeoutNs / 1000 / 1000);
+          ctx.close();
+        } else if (closeIdleConnections) {
+          // While CloseIdleConnections is enable, we also close idle connection
+          ctx.close();
+        }
       }
     }
   }
diff --git a/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java b/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
index 35de5e57ccb9..f44713741930 100644
--- a/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
@@ -21,6 +21,7 @@
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Map;
+import java.util.NoSuchElementException;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -37,6 +38,7 @@
 import org.apache.spark.network.server.NoOpRpcHandler;
 import org.apache.spark.network.server.RpcHandler;
 import org.apache.spark.network.server.TransportServer;
+import org.apache.spark.network.util.ConfigProvider;
 import org.apache.spark.network.util.SystemPropertyConfigProvider;
 import org.apache.spark.network.util.JavaUtils;
 import org.apache.spark.network.util.MapConfigProvider;
@@ -177,4 +179,36 @@ public void closeBlockClientsWithFactory() throws IOException {
     assertFalse(c1.isActive());
     assertFalse(c2.isActive());
   }
+
+  @Test
+  public void closeIdleConnectionForRequestTimeOut() throws IOException, InterruptedException {
+    TransportConf conf = new TransportConf(new ConfigProvider() {
+
+      @Override
+      public String get(String name) {
+        if ("spark.shuffle.io.connectionTimeout".equals(name)) {
+          // We should make sure there is enough time for us to observe the channel is active
+          return "1s";
+        }
+        String value = System.getProperty(name);
+        if (value == null) {
+          throw new NoSuchElementException(name);
+        }
+        return value;
+      }
+    });
+    TransportContext context = new TransportContext(conf, new NoOpRpcHandler(), true);
+    TransportClientFactory factory = context.createClientFactory();
+    try {
+      TransportClient c1 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
+      assertTrue(c1.isActive());
+      long expiredTime = System.currentTimeMillis() + 10000; // 10 seconds
+      while (c1.isActive() && System.currentTimeMillis() < expiredTime) {
+        Thread.sleep(10);
+      }
+      assertFalse(c1.isActive());
+    } finally {
+      factory.close();
+    }
+  }
 }
diff --git a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleClient.java b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleClient.java
index ea6d248d66be..ef3a9dcc8711 100644
--- a/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleClient.java
+++ b/network/shuffle/src/main/java/org/apache/spark/network/shuffle/ExternalShuffleClient.java
@@ -78,7 +78,7 @@ protected void checkInit() {
   @Override
   public void init(String appId) {
     this.appId = appId;
-    TransportContext context = new TransportContext(conf, new NoOpRpcHandler());
+    TransportContext context = new TransportContext(conf, new NoOpRpcHandler(), true);
     List<TransportClientBootstrap> bootstraps = Lists.newArrayList();
     if (saslEnabled) {
       bootstraps.add(new SaslClientBootstrap(conf, appId, secretKeyHolder, saslEncryptionEnabled));
@@ -137,9 +137,13 @@ public void registerWithShuffleServer(
       String execId,
       ExecutorShuffleInfo executorInfo) throws IOException {
     checkInit();
-    TransportClient client = clientFactory.createClient(host, port);
-    byte[] registerMessage = new RegisterExecutor(appId, execId, executorInfo).toByteArray();
-    client.sendRpcSync(registerMessage, 5000 /* timeoutMs */);
+    TransportClient client = clientFactory.createUnmanagedClient(host, port);
+    try {
+      byte[] registerMessage = new RegisterExecutor(appId, execId, executorInfo).toByteArray();
+      client.sendRpcSync(registerMessage, 5000 /* timeoutMs */);
+    } finally {
+      client.close();
+    }
   }
 
   @Override

From e0701c75601c43f69ed27fc7c252321703db51f2 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 10 Nov 2015 11:06:29 -0800
Subject: [PATCH 596/896] [SPARK-9830][SQL] Remove AggregateExpression1 and
 Aggregate Operator used to evaluate AggregateExpression1s

https://issues.apache.org/jira/browse/SPARK-9830

This PR contains the following main changes.
* Removing `AggregateExpression1`.
* Removing `Aggregate` operator, which is used to evaluate `AggregateExpression1`.
* Removing planner rule used to plan `Aggregate`.
* Linking `MultipleDistinctRewriter` to analyzer.
* Renaming `AggregateExpression2` to `AggregateExpression` and `AggregateFunction2` to `AggregateFunction`.
* Updating places where we create aggregate expression. The way to create aggregate expressions is `AggregateExpression(aggregateFunction, mode, isDistinct)`.
* Changing `val`s in `DeclarativeAggregate`s that touch children of this function to `lazy val`s (when we create aggregate expression in DataFrame API, children of an aggregate function can be unresolved).

Author: Yin Huai <yhuai@databricks.com>

Closes #9556 from yhuai/removeAgg1.
---
 R/pkg/R/functions.R                           |    2 +-
 python/pyspark/sql/dataframe.py               |    2 +-
 python/pyspark/sql/functions.py               |    2 +-
 python/pyspark/sql/tests.py                   |    2 +-
 .../spark/sql/catalyst/CatalystConf.scala     |   10 +-
 .../apache/spark/sql/catalyst/SqlParser.scala |   14 +-
 .../sql/catalyst/analysis/Analyzer.scala      |   26 +-
 .../sql/catalyst/analysis/CheckAnalysis.scala |   46 +-
 .../DistinctAggregationRewriter.scala}        |  235 +---
 .../catalyst/analysis/FunctionRegistry.scala  |    2 +
 .../catalyst/analysis/HiveTypeCoercion.scala  |   20 +-
 .../sql/catalyst/analysis/unresolved.scala    |    4 +
 .../spark/sql/catalyst/dsl/package.scala      |   22 +-
 .../expressions/aggregate/Average.scala       |   31 +-
 .../aggregate/CentralMomentAgg.scala          |   13 +-
 .../catalyst/expressions/aggregate/Corr.scala |   15 +
 .../expressions/aggregate/Count.scala         |   28 +-
 .../expressions/aggregate/First.scala         |   14 +-
 .../aggregate/HyperLogLogPlusPlus.scala       |   17 +
 .../expressions/aggregate/Kurtosis.scala      |    2 +
 .../catalyst/expressions/aggregate/Last.scala |   12 +-
 .../catalyst/expressions/aggregate/Max.scala  |   17 +-
 .../catalyst/expressions/aggregate/Min.scala  |   17 +-
 .../expressions/aggregate/Skewness.scala      |    2 +
 .../expressions/aggregate/Stddev.scala        |   31 +-
 .../catalyst/expressions/aggregate/Sum.scala  |   29 +-
 .../expressions/aggregate/Variance.scala      |    7 +-
 .../expressions/aggregate/interfaces.scala    |   57 +-
 .../sql/catalyst/expressions/aggregates.scala | 1073 -----------------
 .../sql/catalyst/optimizer/Optimizer.scala    |   23 +-
 .../sql/catalyst/planning/patterns.scala      |   74 --
 .../spark/sql/catalyst/plans/QueryPlan.scala  |   12 +-
 .../plans/logical/basicOperators.scala        |    4 +-
 .../analysis/AnalysisErrorSuite.scala         |   23 +-
 .../sql/catalyst/analysis/AnalysisSuite.scala |    2 +-
 .../analysis/DecimalPrecisionSuite.scala      |    1 +
 .../ExpressionTypeCheckingSuite.scala         |    6 +-
 .../optimizer/ConstantFoldingSuite.scala      |    4 +-
 .../optimizer/FilterPushdownSuite.scala       |   14 +-
 .../org/apache/spark/sql/DataFrame.scala      |   13 +-
 .../org/apache/spark/sql/GroupedData.scala    |   45 +-
 .../scala/org/apache/spark/sql/SQLConf.scala  |   20 +-
 .../spark/sql/execution/Aggregate.scala       |  205 ----
 .../apache/spark/sql/execution/Expand.scala   |    3 +
 .../spark/sql/execution/SparkPlanner.scala    |    1 -
 .../spark/sql/execution/SparkStrategies.scala |  238 ++--
 .../aggregate/AggregationIterator.scala       |   28 +-
 .../aggregate/SortBasedAggregate.scala        |    4 +-
 .../SortBasedAggregationIterator.scala        |    8 +-
 .../aggregate/TungstenAggregate.scala         |    6 +-
 .../TungstenAggregationIterator.scala         |   36 +-
 .../spark/sql/execution/aggregate/udaf.scala  |    2 +-
 .../spark/sql/execution/aggregate/utils.scala |   20 +-
 .../spark/sql/expressions/Aggregator.scala    |    5 +-
 .../spark/sql/expressions/WindowSpec.scala    |   82 +-
 .../apache/spark/sql/expressions/udaf.scala   |    6 +-
 .../org/apache/spark/sql/functions.scala      |   53 +-
 .../org/apache/spark/sql/SQLQuerySuite.scala  |   69 +-
 .../spark/sql/UserDefinedTypeSuite.scala      |   15 +-
 .../spark/sql/execution/PlannerSuite.scala    |    2 +-
 .../execution/metric/SQLMetricsSuite.scala    |   30 -
 .../apache/spark/sql/hive/HiveContext.scala   |    1 -
 .../org/apache/spark/sql/hive/HiveQl.scala    |    8 +-
 .../execution/AggregationQuerySuite.scala     |  188 ++-
 64 files changed, 743 insertions(+), 2260 deletions(-)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/{expressions/aggregate/Utils.scala => analysis/DistinctAggregationRewriter.scala} (58%)
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala

diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index d7fd27927913..0b280870295a 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -1339,7 +1339,7 @@ setMethod("pmod", signature(y = "Column"),
 #' @export
 setMethod("approxCountDistinct",
           signature(x = "Column"),
-          function(x, rsd = 0.95) {
+          function(x, rsd = 0.05) {
             jc <- callJStatic("org.apache.spark.sql.functions", "approxCountDistinct", x@jc, rsd)
             column(jc)
           })
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index b97c94dad834..0dd75ba7ca82 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -866,7 +866,7 @@ def selectExpr(self, *expr):
         This is a variant of :func:`select` that accepts SQL expressions.
 
         >>> df.selectExpr("age * 2", "abs(age)").collect()
-        [Row((age * 2)=4, 'abs(age)=2), Row((age * 2)=10, 'abs(age)=5)]
+        [Row((age * 2)=4, abs(age)=2), Row((age * 2)=10, abs(age)=5)]
         """
         if len(expr) == 1 and isinstance(expr[0], list):
             expr = expr[0]
diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index 962f676d406d..6e1cbde4239f 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -382,7 +382,7 @@ def expr(str):
     """Parses the expression string into the column that it represents
 
     >>> df.select(expr("length(name)")).collect()
-    [Row('length(name)=5), Row('length(name)=3)]
+    [Row(length(name)=5), Row(length(name)=3)]
     """
     sc = SparkContext._active_spark_context
     return Column(sc._jvm.functions.expr(str))
diff --git a/python/pyspark/sql/tests.py b/python/pyspark/sql/tests.py
index e224574bcb30..9f5f7cfdf7a6 100644
--- a/python/pyspark/sql/tests.py
+++ b/python/pyspark/sql/tests.py
@@ -1017,7 +1017,7 @@ def test_expr(self):
         row = Row(a="length string", b=75)
         df = self.sqlCtx.createDataFrame([row])
         result = df.select(functions.expr("length(a)")).collect()[0].asDict()
-        self.assertEqual(13, result["'length(a)"])
+        self.assertEqual(13, result["length(a)"])
 
     def test_replace(self):
         schema = StructType([
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystConf.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystConf.scala
index 3f351b07b37d..7c2b8a940788 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystConf.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/CatalystConf.scala
@@ -19,6 +19,8 @@ package org.apache.spark.sql.catalyst
 
 private[spark] trait CatalystConf {
   def caseSensitiveAnalysis: Boolean
+
+  protected[spark] def specializeSingleDistinctAggPlanning: Boolean
 }
 
 /**
@@ -29,7 +31,13 @@ object EmptyConf extends CatalystConf {
   override def caseSensitiveAnalysis: Boolean = {
     throw new UnsupportedOperationException
   }
+
+  protected[spark] override def specializeSingleDistinctAggPlanning: Boolean = {
+    throw new UnsupportedOperationException
+  }
 }
 
 /** A CatalystConf that can be used for local testing. */
-case class SimpleCatalystConf(caseSensitiveAnalysis: Boolean) extends CatalystConf
+case class SimpleCatalystConf(caseSensitiveAnalysis: Boolean) extends CatalystConf {
+  protected[spark] override def specializeSingleDistinctAggPlanning: Boolean = true
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
index cd717c09f8e5..2a132d8b82be 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/SqlParser.scala
@@ -22,6 +22,7 @@ import scala.language.implicitConversions
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.util.DataTypeParser
@@ -272,7 +273,7 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
   protected lazy val function: Parser[Expression] =
     ( ident <~ ("(" ~ "*" ~ ")") ^^ { case udfName =>
       if (lexical.normalizeKeyword(udfName) == "count") {
-        Count(Literal(1))
+        AggregateExpression(Count(Literal(1)), mode = Complete, isDistinct = false)
       } else {
         throw new AnalysisException(s"invalid expression $udfName(*)")
       }
@@ -281,14 +282,14 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
       { case udfName ~ exprs => UnresolvedFunction(udfName, exprs, isDistinct = false) }
     | ident ~ ("(" ~ DISTINCT ~> repsep(expression, ",")) <~ ")" ^^ { case udfName ~ exprs =>
       lexical.normalizeKeyword(udfName) match {
-        case "sum" => SumDistinct(exprs.head)
-        case "count" => CountDistinct(exprs)
+        case "count" =>
+          aggregate.Count(exprs).toAggregateExpression(isDistinct = true)
         case _ => UnresolvedFunction(udfName, exprs, isDistinct = true)
       }
     }
     | APPROXIMATE ~> ident ~ ("(" ~ DISTINCT ~> expression <~ ")") ^^ { case udfName ~ exp =>
       if (lexical.normalizeKeyword(udfName) == "count") {
-        ApproxCountDistinct(exp)
+        AggregateExpression(new HyperLogLogPlusPlus(exp), mode = Complete, isDistinct = false)
       } else {
         throw new AnalysisException(s"invalid function approximate $udfName")
       }
@@ -296,7 +297,10 @@ object SqlParser extends AbstractSparkSQLParser with DataTypeParser {
     | APPROXIMATE ~> "(" ~> unsignedFloat ~ ")" ~ ident ~ "(" ~ DISTINCT ~ expression <~ ")" ^^
       { case s ~ _ ~ udfName ~ _ ~ _ ~ exp =>
         if (lexical.normalizeKeyword(udfName) == "count") {
-          ApproxCountDistinct(exp, s.toDouble)
+          AggregateExpression(
+            HyperLogLogPlusPlus(exp, s.toDouble, 0, 0),
+            mode = Complete,
+            isDistinct = false)
         } else {
           throw new AnalysisException(s"invalid function approximate($s) $udfName")
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 899ee67352df..b1e14390b7dc 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -20,8 +20,8 @@ package org.apache.spark.sql.catalyst.analysis
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, AggregateExpression2, AggregateFunction2}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules._
 import org.apache.spark.sql.catalyst.trees.TreeNodeRef
@@ -79,6 +79,7 @@ class Analyzer(
       ExtractWindowExpressions ::
       GlobalAggregates ::
       ResolveAggregateFunctions ::
+      DistinctAggregationRewriter(conf) ::
       HiveTypeCoercion.typeCoercionRules ++
       extendedResolutionRules : _*),
     Batch("Nondeterministic", Once,
@@ -525,21 +526,14 @@ class Analyzer(
           case u @ UnresolvedFunction(name, children, isDistinct) =>
             withPosition(u) {
               registry.lookupFunction(name, children) match {
-                // We get an aggregate function built based on AggregateFunction2 interface.
-                // So, we wrap it in AggregateExpression2.
-                case agg2: AggregateFunction2 => AggregateExpression2(agg2, Complete, isDistinct)
-                // Currently, our old aggregate function interface supports SUM(DISTINCT ...)
-                // and COUTN(DISTINCT ...).
-                case sumDistinct: SumDistinct => sumDistinct
-                case countDistinct: CountDistinct => countDistinct
-                // DISTINCT is not meaningful with Max and Min.
-                case max: Max if isDistinct => max
-                case min: Min if isDistinct => min
-                // For other aggregate functions, DISTINCT keyword is not supported for now.
-                // Once we converted to the new code path, we will allow using DISTINCT keyword.
-                case other: AggregateExpression1 if isDistinct =>
-                  failAnalysis(s"$name does not support DISTINCT keyword.")
-                // If it does not have DISTINCT keyword, we will return it as is.
+                // DISTINCT is not meaningful for a Max or a Min.
+                case max: Max if isDistinct =>
+                  AggregateExpression(max, Complete, isDistinct = false)
+                case min: Min if isDistinct =>
+                  AggregateExpression(min, Complete, isDistinct = false)
+                // We get an aggregate function, we need to wrap it in an AggregateExpression.
+                case agg2: AggregateFunction => AggregateExpression(agg2, Complete, isDistinct)
+                // This function is not an aggregate function, just return the resolved one.
                 case other => other
               }
             }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
index 98d6637c0601..8322e9930cd5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.catalyst.analysis
 
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateFunction, AggregateExpression}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.types._
 
@@ -108,7 +109,19 @@ trait CheckAnalysis {
 
           case Aggregate(groupingExprs, aggregateExprs, child) =>
             def checkValidAggregateExpression(expr: Expression): Unit = expr match {
-              case _: AggregateExpression => // OK
+              case aggExpr: AggregateExpression =>
+                // TODO: Is it possible that the child of a agg function is another
+                // agg function?
+                aggExpr.aggregateFunction.children.foreach {
+                  // This is just a sanity check, our analysis rule PullOutNondeterministic should
+                  // already pull out those nondeterministic expressions and evaluate them in
+                  // a Project node.
+                  case child if !child.deterministic =>
+                    failAnalysis(
+                      s"nondeterministic expression ${expr.prettyString} should not " +
+                        s"appear in the arguments of an aggregate function.")
+                  case child => // OK
+                }
               case e: Attribute if !groupingExprs.exists(_.semanticEquals(e)) =>
                 failAnalysis(
                   s"expression '${e.prettyString}' is neither present in the group by, " +
@@ -120,14 +133,26 @@ trait CheckAnalysis {
               case e => e.children.foreach(checkValidAggregateExpression)
             }
 
-            def checkValidGroupingExprs(expr: Expression): Unit = expr.dataType match {
-              case BinaryType =>
-                failAnalysis(s"binary type expression ${expr.prettyString} cannot be used " +
-                  "in grouping expression")
-              case m: MapType =>
-                failAnalysis(s"map type expression ${expr.prettyString} cannot be used " +
-                  "in grouping expression")
-              case _ => // OK
+            def checkValidGroupingExprs(expr: Expression): Unit = {
+              expr.dataType match {
+                case BinaryType =>
+                  failAnalysis(s"binary type expression ${expr.prettyString} cannot be used " +
+                    "in grouping expression")
+                case a: ArrayType =>
+                  failAnalysis(s"array type expression ${expr.prettyString} cannot be used " +
+                    "in grouping expression")
+                case m: MapType =>
+                  failAnalysis(s"map type expression ${expr.prettyString} cannot be used " +
+                    "in grouping expression")
+                case _ => // OK
+              }
+              if (!expr.deterministic) {
+                // This is just a sanity check, our analysis rule PullOutNondeterministic should
+                // already pull out those nondeterministic expressions and evaluate them in
+                // a Project node.
+                failAnalysis(s"nondeterministic expression ${expr.prettyString} should not " +
+                  s"appear in grouping expression.")
+              }
             }
 
             aggregateExprs.foreach(checkValidAggregateExpression)
@@ -179,7 +204,8 @@ trait CheckAnalysis {
               s"unresolved operator ${operator.simpleString}")
 
           case o if o.expressions.exists(!_.deterministic) &&
-            !o.isInstanceOf[Project] && !o.isInstanceOf[Filter] =>
+            !o.isInstanceOf[Project] && !o.isInstanceOf[Filter] & !o.isInstanceOf[Aggregate] =>
+            // The rule above is used to check Aggregate operator.
             failAnalysis(
               s"""nondeterministic expressions are only allowed in Project or Filter, found:
                  | ${o.expressions.map(_.prettyString).mkString(",")}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
similarity index 58%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
index 9b22ce261973..397eff05686b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Utils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
@@ -15,215 +15,17 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.catalyst.expressions.aggregate
+package org.apache.spark.sql.catalyst.analysis
 
-import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst._
+import org.apache.spark.sql.catalyst.CatalystConf
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans.logical.{Expand, Aggregate, LogicalPlan}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression, AggregateFunction, Complete}
+import org.apache.spark.sql.catalyst.plans.logical.{Aggregate, Expand, LogicalPlan}
 import org.apache.spark.sql.catalyst.rules.Rule
-import org.apache.spark.sql.types._
+import org.apache.spark.sql.types.IntegerType
 
 /**
- * Utility functions used by the query planner to convert our plan to new aggregation code path.
- */
-object Utils {
-
-  // Check if the DataType given cannot be part of a group by clause.
-  private def isUnGroupable(dt: DataType): Boolean = dt match {
-    case _: ArrayType | _: MapType => true
-    case s: StructType => s.fields.exists(f => isUnGroupable(f.dataType))
-    case _ => false
-  }
-
-  // Right now, we do not support complex types in the grouping key schema.
-  private def supportsGroupingKeySchema(aggregate: Aggregate): Boolean =
-    !aggregate.groupingExpressions.exists(e => isUnGroupable(e.dataType))
-
-  private def doConvert(plan: LogicalPlan): Option[Aggregate] = plan match {
-    case p: Aggregate if supportsGroupingKeySchema(p) =>
-
-      val converted = MultipleDistinctRewriter.rewrite(p.transformExpressionsDown {
-        case expressions.Average(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Average(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Count(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Count(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.CountDistinct(children) =>
-          val child = if (children.size > 1) {
-            DropAnyNull(CreateStruct(children))
-          } else {
-            children.head
-          }
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Count(child),
-            mode = aggregate.Complete,
-            isDistinct = true)
-
-        case expressions.First(child, ignoreNulls) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.First(child, ignoreNulls),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Kurtosis(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Kurtosis(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Last(child, ignoreNulls) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Last(child, ignoreNulls),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Max(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Max(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Min(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Min(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Skewness(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Skewness(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.StddevPop(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.StddevPop(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.StddevSamp(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.StddevSamp(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.Sum(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Sum(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.SumDistinct(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Sum(child),
-            mode = aggregate.Complete,
-            isDistinct = true)
-
-        case expressions.Corr(left, right) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.Corr(left, right),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.ApproxCountDistinct(child, rsd) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.HyperLogLogPlusPlus(child, rsd),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.VariancePop(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.VariancePop(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-
-        case expressions.VarianceSamp(child) =>
-          aggregate.AggregateExpression2(
-            aggregateFunction = aggregate.VarianceSamp(child),
-            mode = aggregate.Complete,
-            isDistinct = false)
-      })
-
-      // Check if there is any expressions.AggregateExpression1 left.
-      // If so, we cannot convert this plan.
-      val hasAggregateExpression1 = converted.aggregateExpressions.exists { expr =>
-        // For every expressions, check if it contains AggregateExpression1.
-        expr.find {
-          case agg: expressions.AggregateExpression1 => true
-          case other => false
-        }.isDefined
-      }
-
-      // Check if there are multiple distinct columns.
-      // TODO remove this.
-      val aggregateExpressions = converted.aggregateExpressions.flatMap { expr =>
-        expr.collect {
-          case agg: AggregateExpression2 => agg
-        }
-      }.toSet.toSeq
-      val functionsWithDistinct = aggregateExpressions.filter(_.isDistinct)
-      val hasMultipleDistinctColumnSets =
-        if (functionsWithDistinct.map(_.aggregateFunction.children).distinct.length > 1) {
-          true
-        } else {
-          false
-        }
-
-      if (!hasAggregateExpression1 && !hasMultipleDistinctColumnSets) Some(converted) else None
-
-    case other => None
-  }
-
-  def checkInvalidAggregateFunction2(aggregate: Aggregate): Unit = {
-    // If the plan cannot be converted, we will do a final round check to see if the original
-    // logical.Aggregate contains both AggregateExpression1 and AggregateExpression2. If so,
-    // we need to throw an exception.
-    val aggregateFunction2s = aggregate.aggregateExpressions.flatMap { expr =>
-      expr.collect {
-        case agg: AggregateExpression2 => agg.aggregateFunction
-      }
-    }.distinct
-    if (aggregateFunction2s.nonEmpty) {
-      // For functions implemented based on the new interface, prepare a list of function names.
-      val invalidFunctions = {
-        if (aggregateFunction2s.length > 1) {
-          s"${aggregateFunction2s.tail.map(_.nodeName).mkString(",")} " +
-            s"and ${aggregateFunction2s.head.nodeName} are"
-        } else {
-          s"${aggregateFunction2s.head.nodeName} is"
-        }
-      }
-      val errorMessage =
-        s"${invalidFunctions} implemented based on the new Aggregate Function " +
-          s"interface and it cannot be used with functions implemented based on " +
-          s"the old Aggregate Function interface."
-      throw new AnalysisException(errorMessage)
-    }
-  }
-
-  def tryConvert(plan: LogicalPlan): Option[Aggregate] = plan match {
-    case p: Aggregate =>
-      val converted = doConvert(p)
-      if (converted.isDefined) {
-        converted
-      } else {
-        checkInvalidAggregateFunction2(p)
-        None
-      }
-    case other => None
-  }
-}
-
-/**
- * This rule rewrites an aggregate query with multiple distinct clauses into an expanded double
+ * This rule rewrites an aggregate query with distinct aggregations into an expanded double
  * aggregation in which the regular aggregation expressions and every distinct clause is aggregated
  * in a separate group. The results are then combined in a second aggregate.
  *
@@ -298,9 +100,11 @@ object Utils {
  * we could improve this in the current rule by applying more advanced expression cannocalization
  * techniques.
  */
-object MultipleDistinctRewriter extends Rule[LogicalPlan] {
+case class DistinctAggregationRewriter(conf: CatalystConf) extends Rule[LogicalPlan] {
 
   def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
+    case p if !p.resolved => p
+    // We need to wait until this Aggregate operator is resolved.
     case a: Aggregate => rewrite(a)
     case p => p
   }
@@ -310,7 +114,7 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
     // Collect all aggregate expressions.
     val aggExpressions = a.aggregateExpressions.flatMap { e =>
       e.collect {
-        case ae: AggregateExpression2 => ae
+        case ae: AggregateExpression => ae
       }
     }
 
@@ -319,8 +123,15 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       .filter(_.isDistinct)
       .groupBy(_.aggregateFunction.children.toSet)
 
-    // Only continue to rewrite if there is more than one distinct group.
-    if (distinctAggGroups.size > 1) {
+    val shouldRewrite = if (conf.specializeSingleDistinctAggPlanning) {
+      // When the flag is set to specialize single distinct agg planning,
+      // we will rely on our Aggregation strategy to handle queries with a single
+      // distinct column and this aggregate operator does have grouping expressions.
+      distinctAggGroups.size > 1 || (distinctAggGroups.size == 1 && a.groupingExpressions.isEmpty)
+    } else {
+      distinctAggGroups.size >= 1
+    }
+    if (shouldRewrite) {
       // Create the attributes for the grouping id and the group by clause.
       val gid = new AttributeReference("gid", IntegerType, false)()
       val groupByMap = a.groupingExpressions.collect {
@@ -332,11 +143,11 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
       // Functions used to modify aggregate functions and their inputs.
       def evalWithinGroup(id: Literal, e: Expression) = If(EqualTo(gid, id), e, nullify(e))
       def patchAggregateFunctionChildren(
-          af: AggregateFunction2)(
-          attrs: Expression => Expression): AggregateFunction2 = {
+          af: AggregateFunction)(
+          attrs: Expression => Expression): AggregateFunction = {
         af.withNewChildren(af.children.map {
           case afc => attrs(afc)
-        }).asInstanceOf[AggregateFunction2]
+        }).asInstanceOf[AggregateFunction]
       }
 
       // Setup unique distinct aggregate children.
@@ -381,7 +192,7 @@ object MultipleDistinctRewriter extends Rule[LogicalPlan] {
         val operator = Alias(e.copy(aggregateFunction = af), e.prettyString)()
 
         // Select the result of the first aggregate in the last aggregate.
-        val result = AggregateExpression2(
+        val result = AggregateExpression(
           aggregate.First(evalWithinGroup(regularGroupId, operator.toAttribute), Literal(true)),
           mode = Complete,
           isDistinct = false)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index d4334d16289a..dfa749d1afa5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -24,6 +24,7 @@ import scala.util.{Failure, Success, Try}
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.analysis.FunctionRegistry.FunctionBuilder
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.util.StringKeyHashMap
 
 
@@ -177,6 +178,7 @@ object FunctionRegistry {
     expression[ToRadians]("radians"),
 
     // aggregate functions
+    expression[HyperLogLogPlusPlus]("approx_count_distinct"),
     expression[Average]("avg"),
     expression[Corr]("corr"),
     expression[Count]("count"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 84e2b1366f62..bf2bff0243fa 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.catalyst.analysis
 import javax.annotation.Nullable
 
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.sql.types._
@@ -295,14 +296,17 @@ object HiveTypeCoercion {
         i.makeCopy(Array(Cast(a, StringType), b.map(Cast(_, StringType))))
 
       case Sum(e @ StringType()) => Sum(Cast(e, DoubleType))
-      case SumDistinct(e @ StringType()) => Sum(Cast(e, DoubleType))
       case Average(e @ StringType()) => Average(Cast(e, DoubleType))
       case StddevPop(e @ StringType()) => StddevPop(Cast(e, DoubleType))
       case StddevSamp(e @ StringType()) => StddevSamp(Cast(e, DoubleType))
-      case VariancePop(e @ StringType()) => VariancePop(Cast(e, DoubleType))
-      case VarianceSamp(e @ StringType()) => VarianceSamp(Cast(e, DoubleType))
-      case Skewness(e @ StringType()) => Skewness(Cast(e, DoubleType))
-      case Kurtosis(e @ StringType()) => Kurtosis(Cast(e, DoubleType))
+      case VariancePop(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        VariancePop(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
+      case VarianceSamp(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        VarianceSamp(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
+      case Skewness(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        Skewness(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
+      case Kurtosis(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        Kurtosis(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
     }
   }
 
@@ -562,12 +566,6 @@ object HiveTypeCoercion {
       case Sum(e @ IntegralType()) if e.dataType != LongType => Sum(Cast(e, LongType))
       case Sum(e @ FractionalType()) if e.dataType != DoubleType => Sum(Cast(e, DoubleType))
 
-      case s @ SumDistinct(e @ DecimalType()) => s // Decimal is already the biggest.
-      case SumDistinct(e @ IntegralType()) if e.dataType != LongType =>
-        SumDistinct(Cast(e, LongType))
-      case SumDistinct(e @ FractionalType()) if e.dataType != DoubleType =>
-        SumDistinct(Cast(e, DoubleType))
-
       case s @ Average(e @ DecimalType()) => s // Decimal is already the biggest.
       case Average(e @ IntegralType()) if e.dataType != LongType =>
         Average(Cast(e, LongType))
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
index eae17c86ddc7..6485bdfb3023 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
@@ -141,6 +141,10 @@ case class UnresolvedFunction(
   override def nullable: Boolean = throw new UnresolvedException(this, "nullable")
   override lazy val resolved = false
 
+  override def prettyString: String = {
+    s"${name}(${children.map(_.prettyString).mkString(",")})"
+  }
+
   override def toString: String = s"'$name(${children.mkString(",")})"
 }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
index d8df66430a69..af594c25c54c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/dsl/package.scala
@@ -23,6 +23,7 @@ import scala.language.implicitConversions
 
 import org.apache.spark.sql.catalyst.analysis.{EliminateSubQueries, UnresolvedExtractValue, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.types._
@@ -144,17 +145,18 @@ package object dsl {
       }
     }
 
-    def sum(e: Expression): Expression = Sum(e)
-    def sumDistinct(e: Expression): Expression = SumDistinct(e)
-    def count(e: Expression): Expression = Count(e)
-    def countDistinct(e: Expression*): Expression = CountDistinct(e)
+    def sum(e: Expression): Expression = Sum(e).toAggregateExpression()
+    def sumDistinct(e: Expression): Expression = Sum(e).toAggregateExpression(isDistinct = true)
+    def count(e: Expression): Expression = Count(e).toAggregateExpression()
+    def countDistinct(e: Expression*): Expression =
+      Count(e).toAggregateExpression(isDistinct = true)
     def approxCountDistinct(e: Expression, rsd: Double = 0.05): Expression =
-      ApproxCountDistinct(e, rsd)
-    def avg(e: Expression): Expression = Average(e)
-    def first(e: Expression): Expression = First(e)
-    def last(e: Expression): Expression = Last(e)
-    def min(e: Expression): Expression = Min(e)
-    def max(e: Expression): Expression = Max(e)
+      HyperLogLogPlusPlus(e, rsd).toAggregateExpression()
+    def avg(e: Expression): Expression = Average(e).toAggregateExpression()
+    def first(e: Expression): Expression = new First(e).toAggregateExpression()
+    def last(e: Expression): Expression = new Last(e).toAggregateExpression()
+    def min(e: Expression): Expression = Min(e).toAggregateExpression()
+    def max(e: Expression): Expression = Max(e).toAggregateExpression()
     def upper(e: Expression): Expression = Upper(e)
     def lower(e: Expression): Expression = Lower(e)
     def sqrt(e: Expression): Expression = Sqrt(e)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
index c8c20ada5fbc..7f9e5034702e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
@@ -17,8 +17,10 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 case class Average(child: Expression) extends DeclarativeAggregate {
@@ -32,36 +34,33 @@ case class Average(child: Expression) extends DeclarativeAggregate {
   // Return data type.
   override def dataType: DataType = resultType
 
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select avg(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
 
-  private val resultType = child.dataType match {
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForNumericExpr(child.dataType, "function average")
+
+  private lazy val resultType = child.dataType match {
     case DecimalType.Fixed(p, s) =>
       DecimalType.bounded(p + 4, s + 4)
     case _ => DoubleType
   }
 
-  private val sumDataType = child.dataType match {
+  private lazy val sumDataType = child.dataType match {
     case _ @ DecimalType.Fixed(p, s) => DecimalType.bounded(p + 10, s)
     case _ => DoubleType
   }
 
-  private val sum = AttributeReference("sum", sumDataType)()
-  private val count = AttributeReference("count", LongType)()
+  private lazy val sum = AttributeReference("sum", sumDataType)()
+  private lazy val count = AttributeReference("count", LongType)()
 
-  override val aggBufferAttributes = sum :: count :: Nil
+  override lazy val aggBufferAttributes = sum :: count :: Nil
 
-  override val initialValues = Seq(
+  override lazy val initialValues = Seq(
     /* sum = */ Cast(Literal(0), sumDataType),
     /* count = */ Literal(0L)
   )
 
-  override val updateExpressions = Seq(
+  override lazy val updateExpressions = Seq(
     /* sum = */
     Add(
       sum,
@@ -69,13 +68,13 @@ case class Average(child: Expression) extends DeclarativeAggregate {
     /* count = */ If(IsNull(child), count, count + 1L)
   )
 
-  override val mergeExpressions = Seq(
+  override lazy val mergeExpressions = Seq(
     /* sum = */ sum.left + sum.right,
     /* count = */ count.left + count.right
   )
 
   // If all input are nulls, count will be 0 and we will get null after the division.
-  override val evaluateExpression = child.dataType match {
+  override lazy val evaluateExpression = child.dataType match {
     case DecimalType.Fixed(p, s) =>
       // increase the precision and scale to prevent precision loss
       val dt = DecimalType.bounded(p + 14, s + 4)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
index ef08b025ff55..984ce7f24dac 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
@@ -18,7 +18,9 @@
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 /**
@@ -55,13 +57,10 @@ abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate w
 
   override def dataType: DataType = DoubleType
 
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select avg(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
+
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForNumericExpr(child.dataType, s"function $prettyName")
 
   override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
index 832338378fb3..00d7436b710d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Corr.scala
@@ -18,7 +18,9 @@
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
 import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 /**
@@ -35,6 +37,9 @@ case class Corr(
     inputAggBufferOffset: Int = 0)
   extends ImperativeAggregate {
 
+  def this(left: Expression, right: Expression) =
+    this(left, right, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+
   override def children: Seq[Expression] = Seq(left, right)
 
   override def nullable: Boolean = false
@@ -43,6 +48,16 @@ case class Corr(
 
   override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
 
+  override def checkInputDataTypes(): TypeCheckResult = {
+    if (left.dataType.isInstanceOf[DoubleType] && right.dataType.isInstanceOf[DoubleType]) {
+      TypeCheckResult.TypeCheckSuccess
+    } else {
+      TypeCheckResult.TypeCheckFailure(
+        s"corr requires that both arguments are double type, " +
+          s"not (${left.dataType}, ${right.dataType}).")
+    }
+  }
+
   override def aggBufferSchema: StructType = StructType.fromAttributes(aggBufferAttributes)
 
   override def inputAggBufferAttributes: Seq[AttributeReference] = {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
index ec0c8b483a90..09a1da9200df 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Count.scala
@@ -32,23 +32,39 @@ case class Count(child: Expression) extends DeclarativeAggregate {
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val count = AttributeReference("count", LongType)()
+  private lazy val count = AttributeReference("count", LongType)()
 
-  override val aggBufferAttributes = count :: Nil
+  override lazy val aggBufferAttributes = count :: Nil
 
-  override val initialValues = Seq(
+  override lazy val initialValues = Seq(
     /* count = */ Literal(0L)
   )
 
-  override val updateExpressions = Seq(
+  override lazy val updateExpressions = Seq(
     /* count = */ If(IsNull(child), count, count + 1L)
   )
 
-  override val mergeExpressions = Seq(
+  override lazy val mergeExpressions = Seq(
     /* count = */ count.left + count.right
   )
 
-  override val evaluateExpression = Cast(count, LongType)
+  override lazy val evaluateExpression = Cast(count, LongType)
 
   override def defaultResult: Option[Literal] = Option(Literal(0L))
 }
+
+object Count {
+  def apply(children: Seq[Expression]): Count = {
+    // This is used to deal with COUNT DISTINCT. When we have multiple
+    // children (COUNT(DISTINCT col1, col2, ...)), we wrap them in a STRUCT (i.e. a Row).
+    // Also, the semantic of COUNT(DISTINCT col1, col2, ...) is that if there is any
+    // null in the arguments, we will not count that row. So, we use DropAnyNull at here
+    // to return a null when any field of the created STRUCT is null.
+    val child = if (children.size > 1) {
+      DropAnyNull(CreateStruct(children))
+    } else {
+      children.head
+    }
+    Count(child)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
index 902814301585..35f57426feaf 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/First.scala
@@ -51,18 +51,18 @@ case class First(child: Expression, ignoreNullsExpr: Expression) extends Declara
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val first = AttributeReference("first", child.dataType)()
+  private lazy val first = AttributeReference("first", child.dataType)()
 
-  private val valueSet = AttributeReference("valueSet", BooleanType)()
+  private lazy val valueSet = AttributeReference("valueSet", BooleanType)()
 
-  override val aggBufferAttributes: Seq[AttributeReference] = first :: valueSet :: Nil
+  override lazy val aggBufferAttributes: Seq[AttributeReference] = first :: valueSet :: Nil
 
-  override val initialValues: Seq[Literal] = Seq(
+  override lazy val initialValues: Seq[Literal] = Seq(
     /* first = */ Literal.create(null, child.dataType),
     /* valueSet = */ Literal.create(false, BooleanType)
   )
 
-  override val updateExpressions: Seq[Expression] = {
+  override lazy val updateExpressions: Seq[Expression] = {
     if (ignoreNulls) {
       Seq(
         /* first = */ If(Or(valueSet, IsNull(child)), first, child),
@@ -76,7 +76,7 @@ case class First(child: Expression, ignoreNullsExpr: Expression) extends Declara
     }
   }
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
     // For first, we can just check if valueSet.left is set to true. If it is set
     // to true, we use first.right. If not, we use first.right (even if valueSet.right is
     // false, we are safe to do so because first.right will be null in this case).
@@ -86,7 +86,7 @@ case class First(child: Expression, ignoreNullsExpr: Expression) extends Declara
     )
   }
 
-  override val evaluateExpression: AttributeReference = first
+  override lazy val evaluateExpression: AttributeReference = first
 
   override def toString: String = s"first($child)${if (ignoreNulls) " ignore nulls"}"
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
index 8d341ee630bd..8a95c541f1e8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/HyperLogLogPlusPlus.scala
@@ -22,6 +22,7 @@ import java.util
 
 import com.clearspring.analytics.hash.MurmurHash
 
+import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
@@ -55,6 +56,22 @@ case class HyperLogLogPlusPlus(
   extends ImperativeAggregate {
   import HyperLogLogPlusPlus._
 
+  def this(child: Expression) = {
+    this(child = child, relativeSD = 0.05, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+  }
+
+  def this(child: Expression, relativeSD: Expression) = {
+    this(
+      child = child,
+      relativeSD = relativeSD match {
+        case Literal(d: Double, DoubleType) => d
+        case _ =>
+          throw new AnalysisException("The second argument should be a double literal.")
+      },
+      mutableAggBufferOffset = 0,
+      inputAggBufferOffset = 0)
+  }
+
   override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
     copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
index 6da39e714344..bae78d98493b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
@@ -24,6 +24,8 @@ case class Kurtosis(child: Expression,
     inputAggBufferOffset: Int = 0)
   extends CentralMomentAgg(child) {
 
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+
   override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
     copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
index 8636bfe8d07a..be7e12d7a233 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Last.scala
@@ -51,15 +51,15 @@ case class Last(child: Expression, ignoreNullsExpr: Expression) extends Declarat
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val last = AttributeReference("last", child.dataType)()
+  private lazy val last = AttributeReference("last", child.dataType)()
 
-  override val aggBufferAttributes: Seq[AttributeReference] = last :: Nil
+  override lazy val aggBufferAttributes: Seq[AttributeReference] = last :: Nil
 
-  override val initialValues: Seq[Literal] = Seq(
+  override lazy val initialValues: Seq[Literal] = Seq(
     /* last = */ Literal.create(null, child.dataType)
   )
 
-  override val updateExpressions: Seq[Expression] = {
+  override lazy val updateExpressions: Seq[Expression] = {
     if (ignoreNulls) {
       Seq(
         /* last = */ If(IsNull(child), last, child)
@@ -71,7 +71,7 @@ case class Last(child: Expression, ignoreNullsExpr: Expression) extends Declarat
     }
   }
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
     if (ignoreNulls) {
       Seq(
         /* last = */ If(IsNull(last.right), last.left, last.right)
@@ -83,7 +83,7 @@ case class Last(child: Expression, ignoreNullsExpr: Expression) extends Declarat
     }
   }
 
-  override val evaluateExpression: AttributeReference = last
+  override lazy val evaluateExpression: AttributeReference = last
 
   override def toString: String = s"last($child)${if (ignoreNulls) " ignore nulls"}"
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
index b9d75ad45283..61cae44cd0f5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
@@ -17,7 +17,9 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 case class Max(child: Expression) extends DeclarativeAggregate {
@@ -32,24 +34,27 @@ case class Max(child: Expression) extends DeclarativeAggregate {
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val max = AttributeReference("max", child.dataType)()
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForOrderingExpr(child.dataType, "function max")
 
-  override val aggBufferAttributes: Seq[AttributeReference] = max :: Nil
+  private lazy val max = AttributeReference("max", child.dataType)()
 
-  override val initialValues: Seq[Literal] = Seq(
+  override lazy val aggBufferAttributes: Seq[AttributeReference] = max :: Nil
+
+  override lazy val initialValues: Seq[Literal] = Seq(
     /* max = */ Literal.create(null, child.dataType)
   )
 
-  override val updateExpressions: Seq[Expression] = Seq(
+  override lazy val updateExpressions: Seq[Expression] = Seq(
     /* max = */ If(IsNull(child), max, If(IsNull(max), child, Greatest(Seq(max, child))))
   )
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
     val greatest = Greatest(Seq(max.left, max.right))
     Seq(
       /* max = */ If(IsNull(max.right), max.left, If(IsNull(max.left), max.right, greatest))
     )
   }
 
-  override val evaluateExpression: AttributeReference = max
+  override lazy val evaluateExpression: AttributeReference = max
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
index 5ed9cd348dab..242456d9e2e1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
@@ -17,7 +17,9 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 
@@ -33,24 +35,27 @@ case class Min(child: Expression) extends DeclarativeAggregate {
   // Expected input data type.
   override def inputTypes: Seq[AbstractDataType] = Seq(AnyDataType)
 
-  private val min = AttributeReference("min", child.dataType)()
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForOrderingExpr(child.dataType, "function min")
 
-  override val aggBufferAttributes: Seq[AttributeReference] = min :: Nil
+  private lazy val min = AttributeReference("min", child.dataType)()
 
-  override val initialValues: Seq[Expression] = Seq(
+  override lazy val aggBufferAttributes: Seq[AttributeReference] = min :: Nil
+
+  override lazy val initialValues: Seq[Expression] = Seq(
     /* min = */ Literal.create(null, child.dataType)
   )
 
-  override val updateExpressions: Seq[Expression] = Seq(
+  override lazy val updateExpressions: Seq[Expression] = Seq(
     /* min = */ If(IsNull(child), min, If(IsNull(min), child, Least(Seq(min, child))))
   )
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
     val least = Least(Seq(min.left, min.right))
     Seq(
       /* min = */ If(IsNull(min.right), min.left, If(IsNull(min.left), min.right, least))
     )
   }
 
-  override val evaluateExpression: AttributeReference = min
+  override lazy val evaluateExpression: AttributeReference = min
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
index 0def7ddfd9d3..c593074fa247 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
@@ -24,6 +24,8 @@ case class Skewness(child: Expression,
     inputAggBufferOffset: Int = 0)
   extends CentralMomentAgg(child) {
 
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+
   override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
     copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
index 3f47ffe13cbc..5b9eb7ae02f2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
@@ -17,8 +17,10 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 
@@ -48,29 +50,26 @@ abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
 
   override def dataType: DataType = resultType
 
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select stddev(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType, NullType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
 
-  private val resultType = DoubleType
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForNumericExpr(child.dataType, "function stddev")
 
-  private val count = AttributeReference("count", resultType)()
-  private val avg = AttributeReference("avg", resultType)()
-  private val mk = AttributeReference("mk", resultType)()
+  private lazy val resultType = DoubleType
 
-  override val aggBufferAttributes = count :: avg :: mk :: Nil
+  private lazy val count = AttributeReference("count", resultType)()
+  private lazy val avg = AttributeReference("avg", resultType)()
+  private lazy val mk = AttributeReference("mk", resultType)()
 
-  override val initialValues: Seq[Expression] = Seq(
+  override lazy val aggBufferAttributes = count :: avg :: mk :: Nil
+
+  override lazy val initialValues: Seq[Expression] = Seq(
     /* count = */ Cast(Literal(0), resultType),
     /* avg = */ Cast(Literal(0), resultType),
     /* mk = */ Cast(Literal(0), resultType)
   )
 
-  override val updateExpressions: Seq[Expression] = {
+  override lazy val updateExpressions: Seq[Expression] = {
     val value = Cast(child, resultType)
     val newCount = count + Cast(Literal(1), resultType)
 
@@ -89,7 +88,7 @@ abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
     )
   }
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
 
     // count merge
     val newCount = count.left + count.right
@@ -114,7 +113,7 @@ abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
     )
   }
 
-  override val evaluateExpression: Expression = {
+  override lazy val evaluateExpression: Expression = {
     // when count == 0, return null
     // when count == 1, return 0
     // when count >1
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
index 7f8adbc56ad1..c005ec965721 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
@@ -17,7 +17,9 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.types._
 
 case class Sum(child: Expression) extends DeclarativeAggregate {
@@ -29,16 +31,13 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
   // Return data type.
   override def dataType: DataType = resultType
 
-  // Expected input data type.
-  // TODO: Right now, we replace old aggregate functions (based on AggregateExpression1) to the
-  // new version at planning time (after analysis phase). For now, NullType is added at here
-  // to make it resolved when we have cases like `select sum(null)`.
-  // We can use our analyzer to cast NullType to the default data type of the NumericType once
-  // we remove the old aggregate functions. Then, we will not need NullType at here.
   override def inputTypes: Seq[AbstractDataType] =
     Seq(TypeCollection(LongType, DoubleType, DecimalType, NullType))
 
-  private val resultType = child.dataType match {
+  override def checkInputDataTypes(): TypeCheckResult =
+    TypeUtils.checkForNumericExpr(child.dataType, "function sum")
+
+  private lazy val resultType = child.dataType match {
     case DecimalType.Fixed(precision, scale) =>
       DecimalType.bounded(precision + 10, scale)
     // TODO: Remove this line once we remove the NullType from inputTypes.
@@ -46,24 +45,24 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
     case _ => child.dataType
   }
 
-  private val sumDataType = resultType
+  private lazy val sumDataType = resultType
 
-  private val sum = AttributeReference("sum", sumDataType)()
+  private lazy val sum = AttributeReference("sum", sumDataType)()
 
-  private val zero = Cast(Literal(0), sumDataType)
+  private lazy val zero = Cast(Literal(0), sumDataType)
 
-  override val aggBufferAttributes = sum :: Nil
+  override lazy val aggBufferAttributes = sum :: Nil
 
-  override val initialValues: Seq[Expression] = Seq(
+  override lazy val initialValues: Seq[Expression] = Seq(
     /* sum = */ Literal.create(null, sumDataType)
   )
 
-  override val updateExpressions: Seq[Expression] = Seq(
+  override lazy val updateExpressions: Seq[Expression] = Seq(
     /* sum = */
     Coalesce(Seq(Add(Coalesce(Seq(sum, zero)), Cast(child, sumDataType)), sum))
   )
 
-  override val mergeExpressions: Seq[Expression] = {
+  override lazy val mergeExpressions: Seq[Expression] = {
     val add = Add(Coalesce(Seq(sum.left, zero)), Cast(sum.right, sumDataType))
     Seq(
       /* sum = */
@@ -71,5 +70,5 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
     )
   }
 
-  override val evaluateExpression: Expression = Cast(sum, resultType)
+  override lazy val evaluateExpression: Expression = Cast(sum, resultType)
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
index ec63534e5290..ede2da280596 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
@@ -24,6 +24,8 @@ case class VarianceSamp(child: Expression,
     inputAggBufferOffset: Int = 0)
   extends CentralMomentAgg(child) {
 
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+
   override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
     copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
@@ -42,11 +44,14 @@ case class VarianceSamp(child: Expression,
   }
 }
 
-case class VariancePop(child: Expression,
+case class VariancePop(
+    child: Expression,
     mutableAggBufferOffset: Int = 0,
     inputAggBufferOffset: Int = 0)
   extends CentralMomentAgg(child) {
 
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
+
   override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
     copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
index 5c5b3d1ccd3c..3b441de34a49 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
@@ -17,23 +17,24 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
+import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.types._
 
-/** The mode of an [[AggregateFunction2]]. */
+/** The mode of an [[AggregateFunction]]. */
 private[sql] sealed trait AggregateMode
 
 /**
- * An [[AggregateFunction2]] with [[Partial]] mode is used for partial aggregation.
+ * An [[AggregateFunction]] with [[Partial]] mode is used for partial aggregation.
  * This function updates the given aggregation buffer with the original input of this
  * function. When it has processed all input rows, the aggregation buffer is returned.
  */
 private[sql] case object Partial extends AggregateMode
 
 /**
- * An [[AggregateFunction2]] with [[PartialMerge]] mode is used to merge aggregation buffers
+ * An [[AggregateFunction]] with [[PartialMerge]] mode is used to merge aggregation buffers
  * containing intermediate results for this function.
  * This function updates the given aggregation buffer by merging multiple aggregation buffers.
  * When it has processed all input rows, the aggregation buffer is returned.
@@ -41,7 +42,7 @@ private[sql] case object Partial extends AggregateMode
 private[sql] case object PartialMerge extends AggregateMode
 
 /**
- * An [[AggregateFunction2]] with [[Final]] mode is used to merge aggregation buffers
+ * An [[AggregateFunction]] with [[Final]] mode is used to merge aggregation buffers
  * containing intermediate results for this function and then generate final result.
  * This function updates the given aggregation buffer by merging multiple aggregation buffers.
  * When it has processed all input rows, the final result of this function is returned.
@@ -49,7 +50,7 @@ private[sql] case object PartialMerge extends AggregateMode
 private[sql] case object Final extends AggregateMode
 
 /**
- * An [[AggregateFunction2]] with [[Complete]] mode is used to evaluate this function directly
+ * An [[AggregateFunction]] with [[Complete]] mode is used to evaluate this function directly
  * from original input rows without any partial aggregation.
  * This function updates the given aggregation buffer with the original input of this
  * function. When it has processed all input rows, the final result of this function is returned.
@@ -67,13 +68,15 @@ private[sql] case object NoOp extends Expression with Unevaluable {
 }
 
 /**
- * A container for an [[AggregateFunction2]] with its [[AggregateMode]] and a field
+ * A container for an [[AggregateFunction]] with its [[AggregateMode]] and a field
  * (`isDistinct`) indicating if DISTINCT keyword is specified for this function.
  */
-private[sql] case class AggregateExpression2(
-    aggregateFunction: AggregateFunction2,
+private[sql] case class AggregateExpression(
+    aggregateFunction: AggregateFunction,
     mode: AggregateMode,
-    isDistinct: Boolean) extends AggregateExpression {
+    isDistinct: Boolean)
+  extends Expression
+  with Unevaluable {
 
   override def children: Seq[Expression] = aggregateFunction :: Nil
   override def dataType: DataType = aggregateFunction.dataType
@@ -89,6 +92,8 @@ private[sql] case class AggregateExpression2(
     AttributeSet(childReferences)
   }
 
+  override def prettyString: String = aggregateFunction.prettyString
+
   override def toString: String = s"(${aggregateFunction},mode=$mode,isDistinct=$isDistinct)"
 }
 
@@ -106,10 +111,10 @@ private[sql] case class AggregateExpression2(
  * combined aggregation buffer which concatenates the aggregation buffers of the individual
  * aggregate functions.
  *
- * Code which accepts [[AggregateFunction2]] instances should be prepared to handle both types of
+ * Code which accepts [[AggregateFunction]] instances should be prepared to handle both types of
  * aggregate functions.
  */
-sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInputTypes {
+sealed abstract class AggregateFunction extends Expression with ImplicitCastInputTypes {
 
   /** An aggregate function is not foldable. */
   final override def foldable: Boolean = false
@@ -141,6 +146,27 @@ sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInp
 
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String =
     throw new UnsupportedOperationException(s"Cannot evaluate expression: $this")
+
+  /**
+   * Wraps this [[AggregateFunction]] in an [[AggregateExpression]] because
+   * [[AggregateExpression]] is the container of an [[AggregateFunction]], aggregation mode,
+   * and the flag indicating if this aggregation is distinct aggregation or not.
+   * An [[AggregateFunction]] should not be used without being wrapped in
+   * an [[AggregateExpression]].
+   */
+  def toAggregateExpression(): AggregateExpression = toAggregateExpression(isDistinct = false)
+
+  /**
+   * Wraps this [[AggregateFunction]] in an [[AggregateExpression]] and set isDistinct
+   * field of the [[AggregateExpression]] to the given value because
+   * [[AggregateExpression]] is the container of an [[AggregateFunction]], aggregation mode,
+   * and the flag indicating if this aggregation is distinct aggregation or not.
+   * An [[AggregateFunction]] should not be used without being wrapped in
+   * an [[AggregateExpression]].
+   */
+  def toAggregateExpression(isDistinct: Boolean): AggregateExpression = {
+    AggregateExpression(aggregateFunction = this, mode = Complete, isDistinct = isDistinct)
+  }
 }
 
 /**
@@ -161,7 +187,7 @@ sealed abstract class AggregateFunction2 extends Expression with ImplicitCastInp
  * `inputAggBufferOffset`, but not on the correctness of the attribute ids in `aggBufferAttributes`
  * and `inputAggBufferAttributes`.
  */
-abstract class ImperativeAggregate extends AggregateFunction2 {
+abstract class ImperativeAggregate extends AggregateFunction {
 
   /**
    * The offset of this function's first buffer value in the underlying shared mutable aggregation
@@ -258,9 +284,14 @@ abstract class ImperativeAggregate extends AggregateFunction2 {
  * `bufferAttributes`, defining attributes for the fields of the mutable aggregation buffer. You
  * can then use these attributes when defining `updateExpressions`, `mergeExpressions`, and
  * `evaluateExpressions`.
+ *
+ * Please note that children of an aggregate function can be unresolved (it will happen when
+ * we create this function in DataFrame API). So, if there is any fields in
+ * the implemented class that need to access fields of its children, please make
+ * those fields `lazy val`s.
  */
 abstract class DeclarativeAggregate
-  extends AggregateFunction2
+  extends AggregateFunction
   with Serializable
   with Unevaluable {
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
deleted file mode 100644
index 3dcf7915d77b..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregates.scala
+++ /dev/null
@@ -1,1073 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.expressions
-
-import com.clearspring.analytics.stream.cardinality.HyperLogLog
-
-import org.apache.spark.sql.AnalysisException
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
-import org.apache.spark.sql.catalyst.expressions.codegen.{CodeGenContext, GeneratedExpressionCode}
-import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData, TypeUtils}
-import org.apache.spark.sql.types._
-import org.apache.spark.util.collection.OpenHashSet
-
-
-trait AggregateExpression extends Expression with Unevaluable
-
-trait AggregateExpression1 extends AggregateExpression {
-
-  /**
-   * Aggregate expressions should not be foldable.
-   */
-  override def foldable: Boolean = false
-
-  /**
-   * Creates a new instance that can be used to compute this aggregate expression for a group
-   * of input rows/
-   */
-  def newInstance(): AggregateFunction1
-}
-
-/**
- * Represents an aggregation that has been rewritten to be performed in two steps.
- *
- * @param finalEvaluation an aggregate expression that evaluates to same final result as the
- *                        original aggregation.
- * @param partialEvaluations A sequence of [[NamedExpression]]s that can be computed on partial
- *                           data sets and are required to compute the `finalEvaluation`.
- */
-case class SplitEvaluation(
-    finalEvaluation: Expression,
-    partialEvaluations: Seq[NamedExpression])
-
-/**
- * An [[AggregateExpression1]] that can be partially computed without seeing all relevant tuples.
- * These partial evaluations can then be combined to compute the actual answer.
- */
-trait PartialAggregate1 extends AggregateExpression1 {
-
-  /**
-   * Returns a [[SplitEvaluation]] that computes this aggregation using partial aggregation.
-   */
-  def asPartial: SplitEvaluation
-}
-
-/**
- * A specific implementation of an aggregate function. Used to wrap a generic
- * [[AggregateExpression1]] with an algorithm that will be used to compute one specific result.
- */
-abstract class AggregateFunction1 extends LeafExpression with Serializable {
-
-  /** Base should return the generic aggregate expression that this function is computing */
-  val base: AggregateExpression1
-
-  override def nullable: Boolean = base.nullable
-  override def dataType: DataType = base.dataType
-
-  def update(input: InternalRow): Unit
-
-  override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    throw new UnsupportedOperationException(
-      "AggregateFunction1 should not be used for generated aggregates")
-  }
-}
-
-case class Min(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  override def nullable: Boolean = true
-  override def dataType: DataType = child.dataType
-
-  override def asPartial: SplitEvaluation = {
-    val partialMin = Alias(Min(child), "PartialMin")()
-    SplitEvaluation(Min(partialMin.toAttribute), partialMin :: Nil)
-  }
-
-  override def newInstance(): MinFunction = new MinFunction(child, this)
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForOrderingExpr(child.dataType, "function min")
-}
-
-case class MinFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
-
-  val currentMin: MutableLiteral = MutableLiteral(null, expr.dataType)
-  val cmp = GreaterThan(currentMin, expr)
-
-  override def update(input: InternalRow): Unit = {
-    if (currentMin.value == null) {
-      currentMin.value = expr.eval(input)
-    } else if (cmp.eval(input) == true) {
-      currentMin.value = expr.eval(input)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = currentMin.value
-}
-
-case class Max(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  override def nullable: Boolean = true
-  override def dataType: DataType = child.dataType
-
-  override def asPartial: SplitEvaluation = {
-    val partialMax = Alias(Max(child), "PartialMax")()
-    SplitEvaluation(Max(partialMax.toAttribute), partialMax :: Nil)
-  }
-
-  override def newInstance(): MaxFunction = new MaxFunction(child, this)
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForOrderingExpr(child.dataType, "function max")
-}
-
-case class MaxFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
-
-  val currentMax: MutableLiteral = MutableLiteral(null, expr.dataType)
-  val cmp = LessThan(currentMax, expr)
-
-  override def update(input: InternalRow): Unit = {
-    if (currentMax.value == null) {
-      currentMax.value = expr.eval(input)
-    } else if (cmp.eval(input) == true) {
-      currentMax.value = expr.eval(input)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = currentMax.value
-}
-
-case class Count(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  override def nullable: Boolean = false
-  override def dataType: LongType.type = LongType
-
-  override def asPartial: SplitEvaluation = {
-    val partialCount = Alias(Count(child), "PartialCount")()
-    SplitEvaluation(Coalesce(Seq(Sum(partialCount.toAttribute), Literal(0L))), partialCount :: Nil)
-  }
-
-  override def newInstance(): CountFunction = new CountFunction(child, this)
-}
-
-case class CountFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
-
-  var count: Long = _
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      count += 1L
-    }
-  }
-
-  override def eval(input: InternalRow): Any = count
-}
-
-case class CountDistinct(expressions: Seq[Expression]) extends PartialAggregate1 {
-  def this() = this(null)
-
-  override def children: Seq[Expression] = expressions
-
-  override def nullable: Boolean = false
-  override def dataType: DataType = LongType
-  override def toString: String = s"COUNT(DISTINCT ${expressions.mkString(",")})"
-  override def newInstance(): CountDistinctFunction = new CountDistinctFunction(expressions, this)
-
-  override def asPartial: SplitEvaluation = {
-    val partialSet = Alias(CollectHashSet(expressions), "partialSets")()
-    SplitEvaluation(
-      CombineSetsAndCount(partialSet.toAttribute),
-      partialSet :: Nil)
-  }
-}
-
-case class CountDistinctFunction(
-    @transient expr: Seq[Expression],
-    @transient base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  val seen = new OpenHashSet[Any]()
-
-  @transient
-  val distinctValue = new InterpretedProjection(expr)
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = distinctValue(input)
-    if (!evaluatedExpr.anyNull) {
-      seen.add(evaluatedExpr)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = seen.size.toLong
-}
-
-case class CollectHashSet(expressions: Seq[Expression]) extends AggregateExpression1 {
-  def this() = this(null)
-
-  override def children: Seq[Expression] = expressions
-  override def nullable: Boolean = false
-  override def dataType: OpenHashSetUDT = new OpenHashSetUDT(expressions.head.dataType)
-  override def toString: String = s"AddToHashSet(${expressions.mkString(",")})"
-  override def newInstance(): CollectHashSetFunction =
-    new CollectHashSetFunction(expressions, this)
-}
-
-case class CollectHashSetFunction(
-    @transient expr: Seq[Expression],
-    @transient base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  val seen = new OpenHashSet[Any]()
-
-  @transient
-  val distinctValue = new InterpretedProjection(expr)
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = distinctValue(input)
-    if (!evaluatedExpr.anyNull) {
-      seen.add(evaluatedExpr)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    seen
-  }
-}
-
-case class CombineSetsAndCount(inputSet: Expression) extends AggregateExpression1 {
-  def this() = this(null)
-
-  override def children: Seq[Expression] = inputSet :: Nil
-  override def nullable: Boolean = false
-  override def dataType: DataType = LongType
-  override def toString: String = s"CombineAndCount($inputSet)"
-  override def newInstance(): CombineSetsAndCountFunction = {
-    new CombineSetsAndCountFunction(inputSet, this)
-  }
-}
-
-case class CombineSetsAndCountFunction(
-    @transient inputSet: Expression,
-    @transient base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  val seen = new OpenHashSet[Any]()
-
-  override def update(input: InternalRow): Unit = {
-    val inputSetEval = inputSet.eval(input).asInstanceOf[OpenHashSet[Any]]
-    val inputIterator = inputSetEval.iterator
-    while (inputIterator.hasNext) {
-      seen.add(inputIterator.next)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = seen.size.toLong
-}
-
-/** The data type of ApproxCountDistinctPartition since its output is a HyperLogLog object. */
-private[sql] case object HyperLogLogUDT extends UserDefinedType[HyperLogLog] {
-
-  override def sqlType: DataType = BinaryType
-
-  /** Since we are using HyperLogLog internally, usually it will not be called. */
-  override def serialize(obj: Any): Array[Byte] =
-    obj.asInstanceOf[HyperLogLog].getBytes
-
-
-  /** Since we are using HyperLogLog internally, usually it will not be called. */
-  override def deserialize(datum: Any): HyperLogLog =
-    HyperLogLog.Builder.build(datum.asInstanceOf[Array[Byte]])
-
-  override def userClass: Class[HyperLogLog] = classOf[HyperLogLog]
-}
-
-case class ApproxCountDistinctPartition(child: Expression, relativeSD: Double)
-  extends UnaryExpression with AggregateExpression1 {
-
-  override def nullable: Boolean = false
-  override def dataType: DataType = HyperLogLogUDT
-  override def toString: String = s"APPROXIMATE COUNT(DISTINCT $child)"
-  override def newInstance(): ApproxCountDistinctPartitionFunction = {
-    new ApproxCountDistinctPartitionFunction(child, this, relativeSD)
-  }
-}
-
-case class ApproxCountDistinctPartitionFunction(
-    expr: Expression,
-    base: AggregateExpression1,
-    relativeSD: Double)
-  extends AggregateFunction1 {
-  def this() = this(null, null, 0) // Required for serialization.
-
-  private val hyperLogLog = new HyperLogLog(relativeSD)
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      hyperLogLog.offer(evaluatedExpr)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = hyperLogLog
-}
-
-case class ApproxCountDistinctMerge(child: Expression, relativeSD: Double)
-  extends UnaryExpression with AggregateExpression1 {
-
-  override def nullable: Boolean = false
-  override def dataType: LongType.type = LongType
-  override def toString: String = s"APPROXIMATE COUNT(DISTINCT $child)"
-  override def newInstance(): ApproxCountDistinctMergeFunction = {
-    new ApproxCountDistinctMergeFunction(child, this, relativeSD)
-  }
-}
-
-case class ApproxCountDistinctMergeFunction(
-    expr: Expression,
-    base: AggregateExpression1,
-    relativeSD: Double)
-  extends AggregateFunction1 {
-  def this() = this(null, null, 0) // Required for serialization.
-
-  private val hyperLogLog = new HyperLogLog(relativeSD)
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    hyperLogLog.addAll(evaluatedExpr.asInstanceOf[HyperLogLog])
-  }
-
-  override def eval(input: InternalRow): Any = hyperLogLog.cardinality()
-}
-
-case class ApproxCountDistinct(child: Expression, relativeSD: Double = 0.05)
-  extends UnaryExpression with PartialAggregate1 {
-
-  override def nullable: Boolean = false
-  override def dataType: LongType.type = LongType
-  override def toString: String = s"APPROXIMATE COUNT(DISTINCT $child)"
-
-  override def asPartial: SplitEvaluation = {
-    val partialCount =
-      Alias(ApproxCountDistinctPartition(child, relativeSD), "PartialApproxCountDistinct")()
-
-    SplitEvaluation(
-      ApproxCountDistinctMerge(partialCount.toAttribute, relativeSD),
-      partialCount :: Nil)
-  }
-
-  override def newInstance(): CountDistinctFunction = new CountDistinctFunction(child :: Nil, this)
-}
-
-case class Average(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  override def prettyName: String = "avg"
-
-  override def nullable: Boolean = true
-
-  override def dataType: DataType = child.dataType match {
-    case DecimalType.Fixed(precision, scale) =>
-      // Add 4 digits after decimal point, like Hive
-      DecimalType.bounded(precision + 4, scale + 4)
-    case _ =>
-      DoubleType
-  }
-
-  override def asPartial: SplitEvaluation = {
-    child.dataType match {
-      case DecimalType.Fixed(precision, scale) =>
-        val partialSum = Alias(Sum(child), "PartialSum")()
-        val partialCount = Alias(Count(child), "PartialCount")()
-
-        // partialSum already increase the precision by 10
-        val castedSum = Cast(Sum(partialSum.toAttribute), partialSum.dataType)
-        val castedCount = Cast(Sum(partialCount.toAttribute), partialSum.dataType)
-        SplitEvaluation(
-          Cast(Divide(castedSum, castedCount), dataType),
-          partialCount :: partialSum :: Nil)
-
-      case _ =>
-        val partialSum = Alias(Sum(child), "PartialSum")()
-        val partialCount = Alias(Count(child), "PartialCount")()
-
-        val castedSum = Cast(Sum(partialSum.toAttribute), dataType)
-        val castedCount = Cast(Sum(partialCount.toAttribute), dataType)
-        SplitEvaluation(
-          Divide(castedSum, castedCount),
-          partialCount :: partialSum :: Nil)
-    }
-  }
-
-  override def newInstance(): AverageFunction = new AverageFunction(child, this)
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForNumericExpr(child.dataType, "function average")
-}
-
-case class AverageFunction(expr: Expression, base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  private val calcType =
-    expr.dataType match {
-      case DecimalType.Fixed(precision, scale) =>
-        DecimalType.bounded(precision + 10, scale)
-      case _ =>
-        expr.dataType
-    }
-
-  private val zero = Cast(Literal(0), calcType)
-
-  private var count: Long = _
-  private val sum = MutableLiteral(zero.eval(null), calcType)
-
-  private def addFunction(value: Any) = Add(sum,
-    Cast(Literal.create(value, expr.dataType), calcType))
-
-  override def eval(input: InternalRow): Any = {
-    if (count == 0L) {
-      null
-    } else {
-      expr.dataType match {
-        case DecimalType.Fixed(precision, scale) =>
-          val dt = DecimalType.bounded(precision + 14, scale + 4)
-          Cast(Divide(Cast(sum, dt), Cast(Literal(count), dt)), dataType).eval(null)
-        case _ =>
-          Divide(
-            Cast(sum, dataType),
-            Cast(Literal(count), dataType)).eval(null)
-      }
-    }
-  }
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      count += 1
-      sum.update(addFunction(evaluatedExpr), input)
-    }
-  }
-}
-
-case class Sum(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  override def nullable: Boolean = true
-
-  override def dataType: DataType = child.dataType match {
-    case DecimalType.Fixed(precision, scale) =>
-      // Add 10 digits left of decimal point, like Hive
-      DecimalType.bounded(precision + 10, scale)
-    case _ =>
-      child.dataType
-  }
-
-  override def asPartial: SplitEvaluation = {
-    child.dataType match {
-      case DecimalType.Fixed(_, _) =>
-        val partialSum = Alias(Sum(child), "PartialSum")()
-        SplitEvaluation(
-          Cast(Sum(partialSum.toAttribute), dataType),
-          partialSum :: Nil)
-
-      case _ =>
-        val partialSum = Alias(Sum(child), "PartialSum")()
-        SplitEvaluation(
-          Sum(partialSum.toAttribute),
-          partialSum :: Nil)
-    }
-  }
-
-  override def newInstance(): SumFunction = new SumFunction(child, this)
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForNumericExpr(child.dataType, "function sum")
-}
-
-case class SumFunction(expr: Expression, base: AggregateExpression1) extends AggregateFunction1 {
-  def this() = this(null, null) // Required for serialization.
-
-  private val calcType =
-    expr.dataType match {
-      case DecimalType.Fixed(precision, scale) =>
-        DecimalType.bounded(precision + 10, scale)
-      case _ =>
-        expr.dataType
-    }
-
-  private val zero = Cast(Literal(0), calcType)
-
-  private val sum = MutableLiteral(null, calcType)
-
-  private val addFunction = Coalesce(Seq(Add(Coalesce(Seq(sum, zero)), Cast(expr, calcType)), sum))
-
-  override def update(input: InternalRow): Unit = {
-    sum.update(addFunction, input)
-  }
-
-  override def eval(input: InternalRow): Any = {
-    expr.dataType match {
-      case DecimalType.Fixed(_, _) =>
-        Cast(sum, dataType).eval(null)
-      case _ => sum.eval(null)
-    }
-  }
-}
-
-case class SumDistinct(child: Expression) extends UnaryExpression with PartialAggregate1 {
-
-  def this() = this(null)
-  override def nullable: Boolean = true
-  override def dataType: DataType = child.dataType match {
-    case DecimalType.Fixed(precision, scale) =>
-      // Add 10 digits left of decimal point, like Hive
-      DecimalType.bounded(precision + 10, scale)
-    case _ =>
-      child.dataType
-  }
-  override def toString: String = s"sum(distinct $child)"
-  override def newInstance(): SumDistinctFunction = new SumDistinctFunction(child, this)
-
-  override def asPartial: SplitEvaluation = {
-    val partialSet = Alias(CollectHashSet(child :: Nil), "partialSets")()
-    SplitEvaluation(
-      CombineSetsAndSum(partialSet.toAttribute, this),
-      partialSet :: Nil)
-  }
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForNumericExpr(child.dataType, "function sumDistinct")
-}
-
-case class SumDistinctFunction(expr: Expression, base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  private val seen = new scala.collection.mutable.HashSet[Any]()
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      seen += evaluatedExpr
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    if (seen.size == 0) {
-      null
-    } else {
-      Cast(Literal(
-        seen.reduceLeft(
-          dataType.asInstanceOf[NumericType].numeric.asInstanceOf[Numeric[Any]].plus)),
-        dataType).eval(null)
-    }
-  }
-}
-
-case class CombineSetsAndSum(inputSet: Expression, base: Expression) extends AggregateExpression1 {
-  def this() = this(null, null)
-
-  override def children: Seq[Expression] = inputSet :: Nil
-  override def nullable: Boolean = true
-  override def dataType: DataType = base.dataType
-  override def toString: String = s"CombineAndSum($inputSet)"
-  override def newInstance(): CombineSetsAndSumFunction = {
-    new CombineSetsAndSumFunction(inputSet, this)
-  }
-}
-
-case class CombineSetsAndSumFunction(
-    @transient inputSet: Expression,
-    @transient base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null) // Required for serialization.
-
-  val seen = new OpenHashSet[Any]()
-
-  override def update(input: InternalRow): Unit = {
-    val inputSetEval = inputSet.eval(input).asInstanceOf[OpenHashSet[Any]]
-    val inputIterator = inputSetEval.iterator
-    while (inputIterator.hasNext) {
-      seen.add(inputIterator.next())
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    val casted = seen.asInstanceOf[OpenHashSet[InternalRow]]
-    if (casted.size == 0) {
-      null
-    } else {
-      Cast(Literal(
-        casted.iterator.map(f => f.get(0, null)).reduceLeft(
-          base.dataType.asInstanceOf[NumericType].numeric.asInstanceOf[Numeric[Any]].plus)),
-        base.dataType).eval(null)
-    }
-  }
-}
-
-case class First(
-    child: Expression,
-    ignoreNullsExpr: Expression)
-  extends UnaryExpression with PartialAggregate1 {
-
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
-  private val ignoreNulls: Boolean = ignoreNullsExpr match {
-    case Literal(b: Boolean, BooleanType) => b
-    case _ =>
-      throw new AnalysisException("The second argument of First should be a boolean literal.")
-  }
-
-  override def nullable: Boolean = true
-  override def dataType: DataType = child.dataType
-  override def toString: String = s"first(${child}${if (ignoreNulls) " ignore nulls"})"
-
-  override def asPartial: SplitEvaluation = {
-    val partialFirst = Alias(First(child, ignoreNulls), "PartialFirst")()
-    SplitEvaluation(
-      First(partialFirst.toAttribute, ignoreNulls),
-      partialFirst :: Nil)
-  }
-  override def newInstance(): FirstFunction = new FirstFunction(child, ignoreNulls, this)
-}
-
-object First {
-  def apply(child: Expression): First = First(child, ignoreNulls = false)
-
-  def apply(child: Expression, ignoreNulls: Boolean): First =
-    First(child, Literal.create(ignoreNulls, BooleanType))
-}
-
-case class FirstFunction(
-    expr: Expression,
-    ignoreNulls: Boolean,
-    base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null.asInstanceOf[Boolean], null) // Required for serialization.
-
-  private[this] var result: Any = null
-
-  private[this] var valueSet: Boolean = false
-
-  override def update(input: InternalRow): Unit = {
-    if (!valueSet) {
-      val value = expr.eval(input)
-      // When we have not set the result, we will set the result if we respect nulls
-      // (i.e. ignoreNulls is false), or we ignore nulls and the evaluated value is not null.
-      if (!ignoreNulls || (ignoreNulls && value != null)) {
-        result = value
-        valueSet = true
-      }
-    }
-  }
-
-  override def eval(input: InternalRow): Any = result
-}
-
-case class Last(
-    child: Expression,
-    ignoreNullsExpr: Expression)
-  extends UnaryExpression with PartialAggregate1 {
-
-  def this(child: Expression) = this(child, Literal.create(false, BooleanType))
-
-  private val ignoreNulls: Boolean = ignoreNullsExpr match {
-    case Literal(b: Boolean, BooleanType) => b
-    case _ =>
-      throw new AnalysisException("The second argument of First should be a boolean literal.")
-  }
-
-  override def references: AttributeSet = child.references
-  override def nullable: Boolean = true
-  override def dataType: DataType = child.dataType
-  override def toString: String = s"last($child)${if (ignoreNulls) " ignore nulls"}"
-
-  override def asPartial: SplitEvaluation = {
-    val partialLast = Alias(Last(child, ignoreNulls), "PartialLast")()
-    SplitEvaluation(
-      Last(partialLast.toAttribute, ignoreNulls),
-      partialLast :: Nil)
-  }
-  override def newInstance(): LastFunction = new LastFunction(child, ignoreNulls, this)
-}
-
-object Last {
-  def apply(child: Expression): Last = Last(child, ignoreNulls = false)
-
-  def apply(child: Expression, ignoreNulls: Boolean): Last =
-    Last(child, Literal.create(ignoreNulls, BooleanType))
-}
-
-case class LastFunction(
-    expr: Expression,
-    ignoreNulls: Boolean,
-    base: AggregateExpression1)
-  extends AggregateFunction1 {
-
-  def this() = this(null, null.asInstanceOf[Boolean], null) // Required for serialization.
-
-  var result: Any = null
-
-  override def update(input: InternalRow): Unit = {
-    val value = expr.eval(input)
-    if (!ignoreNulls || (ignoreNulls && value != null)) {
-      result = value
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    result
-  }
-}
-
-/**
- * Calculate Pearson Correlation Coefficient for the given columns.
- * Only support AggregateExpression2.
- *
- */
-case class Corr(left: Expression, right: Expression)
-    extends BinaryExpression with AggregateExpression1 with ImplicitCastInputTypes {
-  override def nullable: Boolean = false
-  override def dataType: DoubleType.type = DoubleType
-  override def toString: String = s"corr($left, $right)"
-  override def inputTypes: Seq[AbstractDataType] = Seq(DoubleType, DoubleType)
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException(
-      "Corr only supports the new AggregateExpression2 and can only be used " +
-        "when spark.sql.useAggregate2 = true")
-  }
-}
-
-// Compute standard deviation based on online algorithm specified here:
-// http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-abstract class StddevAgg1(child: Expression) extends UnaryExpression with PartialAggregate1 {
-  override def nullable: Boolean = true
-  override def dataType: DataType = DoubleType
-
-  def isSample: Boolean
-
-  override def asPartial: SplitEvaluation = {
-    val partialStd = Alias(ComputePartialStd(child), "PartialStddev")()
-    SplitEvaluation(MergePartialStd(partialStd.toAttribute, isSample), partialStd :: Nil)
-  }
-
-  override def newInstance(): StddevFunction = new StddevFunction(child, this, isSample)
-
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForNumericExpr(child.dataType, "function stddev")
-
-}
-
-// Compute the population standard deviation of a column
-case class StddevPop(child: Expression) extends StddevAgg1(child) {
-
-  override def toString: String = s"stddev_pop($child)"
-  override def isSample: Boolean = false
-}
-
-// Compute the sample standard deviation of a column
-case class StddevSamp(child: Expression) extends StddevAgg1(child) {
-
-  override def toString: String = s"stddev_samp($child)"
-  override def isSample: Boolean = true
-}
-
-case class ComputePartialStd(child: Expression) extends UnaryExpression with AggregateExpression1 {
-  def this() = this(null)
-
-  override def children: Seq[Expression] = child :: Nil
-  override def nullable: Boolean = false
-  override def dataType: DataType = ArrayType(DoubleType)
-  override def toString: String = s"computePartialStddev($child)"
-  override def newInstance(): ComputePartialStdFunction =
-    new ComputePartialStdFunction(child, this)
-}
-
-case class ComputePartialStdFunction (
-    expr: Expression,
-    base: AggregateExpression1
-  ) extends AggregateFunction1 {
-
-  def this() = this(null, null)  // Required for serialization
-
-  private val computeType = DoubleType
-  private val zero = Cast(Literal(0), computeType)
-  private var partialCount: Long = 0L
-
-  // the mean of data processed so far
-  private val partialAvg: MutableLiteral = MutableLiteral(zero.eval(null), computeType)
-
-  // update average based on this formula:
-  // avg = avg + (value - avg)/count
-  private def avgAddFunction (value: Literal): Expression = {
-    val delta = Subtract(Cast(value, computeType), partialAvg)
-    Add(partialAvg, Divide(delta, Cast(Literal(partialCount), computeType)))
-  }
-
-  // the sum of squares of difference from mean
-  private val partialMk: MutableLiteral = MutableLiteral(zero.eval(null), computeType)
-
-  // update sum of square of difference from mean based on following formula:
-  // Mk = Mk + (value - preAvg) * (value - updatedAvg)
-  private def mkAddFunction(value: Literal, prePartialAvg: MutableLiteral): Expression = {
-    val delta1 = Subtract(Cast(value, computeType), prePartialAvg)
-    val delta2 = Subtract(Cast(value, computeType), partialAvg)
-    Add(partialMk, Multiply(delta1, delta2))
-  }
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      val exprValue = Literal.create(evaluatedExpr, expr.dataType)
-      val prePartialAvg = partialAvg.copy()
-      partialCount += 1
-      partialAvg.update(avgAddFunction(exprValue), input)
-      partialMk.update(mkAddFunction(exprValue, prePartialAvg), input)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    new GenericArrayData(Array(Cast(Literal(partialCount), computeType).eval(null),
-        partialAvg.eval(null),
-        partialMk.eval(null)))
-  }
-}
-
-case class MergePartialStd(
-    child: Expression,
-    isSample: Boolean
-) extends UnaryExpression with AggregateExpression1 {
-  def this() = this(null, false) // required for serialization
-
-  override def children: Seq[Expression] = child:: Nil
-  override def nullable: Boolean = false
-  override def dataType: DataType = DoubleType
-  override def toString: String = s"MergePartialStd($child)"
-  override def newInstance(): MergePartialStdFunction = {
-    new MergePartialStdFunction(child, this, isSample)
-  }
-}
-
-case class MergePartialStdFunction(
-    expr: Expression,
-    base: AggregateExpression1,
-    isSample: Boolean
-) extends AggregateFunction1 {
-  def this() = this (null, null, false) // Required for serialization
-
-  private val computeType = DoubleType
-  private val zero = Cast(Literal(0), computeType)
-  private val combineCount = MutableLiteral(zero.eval(null), computeType)
-  private val combineAvg = MutableLiteral(zero.eval(null), computeType)
-  private val combineMk = MutableLiteral(zero.eval(null), computeType)
-
-  private def avgUpdateFunction(preCount: Expression,
-                                partialCount: Expression,
-                                partialAvg: Expression): Expression = {
-    Divide(Add(Multiply(combineAvg, preCount),
-               Multiply(partialAvg, partialCount)),
-           Add(preCount, partialCount))
-  }
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input).asInstanceOf[ArrayData]
-
-    if (evaluatedExpr != null) {
-      val exprValue = evaluatedExpr.toArray(computeType)
-      val (partialCount, partialAvg, partialMk) =
-        (Literal.create(exprValue(0), computeType),
-         Literal.create(exprValue(1), computeType),
-         Literal.create(exprValue(2), computeType))
-
-      if (Cast(partialCount, LongType).eval(null).asInstanceOf[Long] > 0) {
-        val preCount = combineCount.copy()
-        combineCount.update(Add(combineCount, partialCount), input)
-
-        val preAvg = combineAvg.copy()
-        val avgDelta = Subtract(partialAvg, preAvg)
-        val mkDelta = Multiply(Multiply(avgDelta, avgDelta),
-                               Divide(Multiply(preCount, partialCount),
-                                      combineCount))
-
-        // update average based on following formula
-        // (combineAvg * preCount + partialAvg * partialCount) / (preCount + partialCount)
-        combineAvg.update(avgUpdateFunction(preCount, partialCount, partialAvg), input)
-
-        // update sum of square differences from mean based on following formula
-        // (combineMk + partialMk + (avgDelta * avgDelta) * (preCount * partialCount/combineCount)
-        combineMk.update(Add(combineMk, Add(partialMk, mkDelta)), input)
-      }
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    val count: Long = Cast(combineCount, LongType).eval(null).asInstanceOf[Long]
-
-    if (count == 0) null
-    else if (count < 2) zero.eval(null)
-    else {
-      // when total count > 2
-      // stddev_samp = sqrt (combineMk/(combineCount -1))
-      // stddev_pop = sqrt (combineMk/combineCount)
-      val varCol = {
-        if (isSample) {
-          Divide(combineMk, Cast(Literal(count - 1), computeType))
-        }
-        else {
-          Divide(combineMk, Cast(Literal(count), computeType))
-        }
-      }
-      Sqrt(varCol).eval(null)
-    }
-  }
-}
-
-case class StddevFunction(
-    expr: Expression,
-    base: AggregateExpression1,
-    isSample: Boolean
-) extends AggregateFunction1 {
-
-  def this() = this(null, null, false) // Required for serialization
-
-  private val computeType = DoubleType
-  private var curCount: Long = 0L
-  private val zero = Cast(Literal(0), computeType)
-  private val curAvg = MutableLiteral(zero.eval(null), computeType)
-  private val curMk = MutableLiteral(zero.eval(null), computeType)
-
-  private def curAvgAddFunction(value: Literal): Expression = {
-    val delta = Subtract(Cast(value, computeType), curAvg)
-    Add(curAvg, Divide(delta, Cast(Literal(curCount), computeType)))
-  }
-  private def curMkAddFunction(value: Literal, preAvg: MutableLiteral): Expression = {
-    val delta1 = Subtract(Cast(value, computeType), preAvg)
-    val delta2 = Subtract(Cast(value, computeType), curAvg)
-    Add(curMk, Multiply(delta1, delta2))
-  }
-
-  override def update(input: InternalRow): Unit = {
-    val evaluatedExpr = expr.eval(input)
-    if (evaluatedExpr != null) {
-      val preAvg: MutableLiteral = curAvg.copy()
-      val exprValue = Literal.create(evaluatedExpr, expr.dataType)
-      curCount += 1L
-      curAvg.update(curAvgAddFunction(exprValue), input)
-      curMk.update(curMkAddFunction(exprValue, preAvg), input)
-    }
-  }
-
-  override def eval(input: InternalRow): Any = {
-    if (curCount == 0) null
-    else if (curCount < 2) zero.eval(null)
-    else {
-      // when total count > 2,
-      // stddev_samp = sqrt(curMk/(curCount - 1))
-      // stddev_pop = sqrt(curMk/curCount)
-      val varCol = {
-        if (isSample) {
-          Divide(curMk, Cast(Literal(curCount - 1), computeType))
-        }
-        else {
-          Divide(curMk, Cast(Literal(curCount), computeType))
-        }
-      }
-      Sqrt(varCol).eval(null)
-    }
-  }
-}
-
-// placeholder
-case class Kurtosis(child: Expression) extends UnaryExpression with AggregateExpression1 {
-
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
-      "please set spark.sql.useAggregate2 = true")
-  }
-
-  override def nullable: Boolean = false
-
-  override def dataType: DoubleType.type = DoubleType
-
-  override def foldable: Boolean = false
-
-  override def prettyName: String = "kurtosis"
-}
-
-// placeholder
-case class Skewness(child: Expression) extends UnaryExpression with AggregateExpression1 {
-
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
-      "please set spark.sql.useAggregate2 = true")
-  }
-
-  override def nullable: Boolean = false
-
-  override def dataType: DoubleType.type = DoubleType
-
-  override def foldable: Boolean = false
-
-  override def prettyName: String = "skewness"
-}
-
-// placeholder
-case class VariancePop(child: Expression) extends UnaryExpression with AggregateExpression1 {
-
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
-      "please set spark.sql.useAggregate2 = true")
-  }
-
-  override def nullable: Boolean = false
-
-  override def dataType: DoubleType.type = DoubleType
-
-  override def foldable: Boolean = false
-
-  override def prettyName: String = "var_pop"
-}
-
-// placeholder
-case class VarianceSamp(child: Expression) extends UnaryExpression with AggregateExpression1 {
-
-  override def newInstance(): AggregateFunction1 = {
-    throw new UnsupportedOperationException("AggregateExpression1 is no longer supported, " +
-      "please set spark.sql.useAggregate2 = true")
-  }
-
-  override def nullable: Boolean = false
-
-  override def dataType: DoubleType.type = DoubleType
-
-  override def foldable: Boolean = false
-
-  override def prettyName: String = "var_samp"
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
index d222dfa33ad8..f4dba67f13b5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
@@ -20,6 +20,7 @@ package org.apache.spark.sql.catalyst.optimizer
 import scala.collection.immutable.HashSet
 import org.apache.spark.sql.catalyst.analysis.{CleanupAliases, EliminateSubQueries}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.plans.FullOuter
 import org.apache.spark.sql.catalyst.plans.LeftOuter
@@ -201,8 +202,8 @@ object SetOperationPushDown extends Rule[LogicalPlan] with PredicateHelper {
 object ColumnPruning extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
     case a @ Aggregate(_, _, e @ Expand(_, _, child))
-      if (child.outputSet -- AttributeSet(e.output) -- a.references).nonEmpty =>
-      a.copy(child = e.copy(child = prunedChild(child, AttributeSet(e.output) ++ a.references)))
+      if (child.outputSet -- e.references -- a.references).nonEmpty =>
+      a.copy(child = e.copy(child = prunedChild(child, e.references ++ a.references)))
 
     // Eliminate attributes that are not needed to calculate the specified aggregates.
     case a @ Aggregate(_, _, child) if (child.outputSet -- a.references).nonEmpty =>
@@ -363,7 +364,8 @@ object LikeSimplification extends Rule[LogicalPlan] {
 object NullPropagation extends Rule[LogicalPlan] {
   def apply(plan: LogicalPlan): LogicalPlan = plan transform {
     case q: LogicalPlan => q transformExpressionsUp {
-      case e @ Count(Literal(null, _)) => Cast(Literal(0L), e.dataType)
+      case e @ AggregateExpression(Count(Literal(null, _)), _, _) =>
+        Cast(Literal(0L), e.dataType)
       case e @ IsNull(c) if !c.nullable => Literal.create(false, BooleanType)
       case e @ IsNotNull(c) if !c.nullable => Literal.create(true, BooleanType)
       case e @ GetArrayItem(Literal(null, _), _) => Literal.create(null, e.dataType)
@@ -375,7 +377,9 @@ object NullPropagation extends Rule[LogicalPlan] {
         Literal.create(null, e.dataType)
       case e @ EqualNullSafe(Literal(null, _), r) => IsNull(r)
       case e @ EqualNullSafe(l, Literal(null, _)) => IsNull(l)
-      case e @ Count(expr) if !expr.nullable => Count(Literal(1))
+      case e @ AggregateExpression(Count(expr), mode, false) if !expr.nullable =>
+        // This rule should be only triggered when isDistinct field is false.
+        AggregateExpression(Count(Literal(1)), mode, isDistinct = false)
 
       // For Coalesce, remove null literals.
       case e @ Coalesce(children) =>
@@ -857,12 +861,15 @@ object DecimalAggregates extends Rule[LogicalPlan] {
   private val MAX_DOUBLE_DIGITS = 15
 
   def apply(plan: LogicalPlan): LogicalPlan = plan transformAllExpressions {
-    case Sum(e @ DecimalType.Expression(prec, scale)) if prec + 10 <= MAX_LONG_DIGITS =>
-      MakeDecimal(Sum(UnscaledValue(e)), prec + 10, scale)
+    case AggregateExpression(Sum(e @ DecimalType.Expression(prec, scale)), mode, isDistinct)
+      if prec + 10 <= MAX_LONG_DIGITS =>
+      MakeDecimal(AggregateExpression(Sum(UnscaledValue(e)), mode, isDistinct), prec + 10, scale)
 
-    case Average(e @ DecimalType.Expression(prec, scale)) if prec + 4 <= MAX_DOUBLE_DIGITS =>
+    case AggregateExpression(Average(e @ DecimalType.Expression(prec, scale)), mode, isDistinct)
+      if prec + 4 <= MAX_DOUBLE_DIGITS =>
+      val newAggExpr = AggregateExpression(Average(UnscaledValue(e)), mode, isDistinct)
       Cast(
-        Divide(Average(UnscaledValue(e)), Literal.create(math.pow(10.0, scale), DoubleType)),
+        Divide(newAggExpr, Literal.create(math.pow(10.0, scale), DoubleType)),
         DecimalType(prec + 4, scale + 4))
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
index 3b975b904a33..6f4f11406d7c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
@@ -84,80 +84,6 @@ object PhysicalOperation extends PredicateHelper {
   }
 }
 
-/**
- * Matches a logical aggregation that can be performed on distributed data in two steps.  The first
- * operates on the data in each partition performing partial aggregation for each group.  The second
- * occurs after the shuffle and completes the aggregation.
- *
- * This pattern will only match if all aggregate expressions can be computed partially and will
- * return the rewritten aggregation expressions for both phases.
- *
- * The returned values for this match are as follows:
- *  - Grouping attributes for the final aggregation.
- *  - Aggregates for the final aggregation.
- *  - Grouping expressions for the partial aggregation.
- *  - Partial aggregate expressions.
- *  - Input to the aggregation.
- */
-object PartialAggregation {
-  type ReturnType =
-    (Seq[Attribute], Seq[NamedExpression], Seq[Expression], Seq[NamedExpression], LogicalPlan)
-
-  def unapply(plan: LogicalPlan): Option[ReturnType] = plan match {
-    case logical.Aggregate(groupingExpressions, aggregateExpressions, child) =>
-      // Collect all aggregate expressions.
-      val allAggregates =
-        aggregateExpressions.flatMap(_ collect { case a: AggregateExpression1 => a})
-      // Collect all aggregate expressions that can be computed partially.
-      val partialAggregates =
-        aggregateExpressions.flatMap(_ collect { case p: PartialAggregate1 => p})
-
-      // Only do partial aggregation if supported by all aggregate expressions.
-      if (allAggregates.size == partialAggregates.size) {
-        // Create a map of expressions to their partial evaluations for all aggregate expressions.
-        val partialEvaluations: Map[TreeNodeRef, SplitEvaluation] =
-          partialAggregates.map(a => (new TreeNodeRef(a), a.asPartial)).toMap
-
-        // We need to pass all grouping expressions though so the grouping can happen a second
-        // time. However some of them might be unnamed so we alias them allowing them to be
-        // referenced in the second aggregation.
-        val namedGroupingExpressions: Seq[(Expression, NamedExpression)] =
-          groupingExpressions.map {
-            case n: NamedExpression => (n, n)
-            case other => (other, Alias(other, "PartialGroup")())
-          }
-
-        // Replace aggregations with a new expression that computes the result from the already
-        // computed partial evaluations and grouping values.
-        val rewrittenAggregateExpressions = aggregateExpressions.map(_.transformDown {
-          case e: Expression if partialEvaluations.contains(new TreeNodeRef(e)) =>
-            partialEvaluations(new TreeNodeRef(e)).finalEvaluation
-
-          case e: Expression =>
-            namedGroupingExpressions.collectFirst {
-              case (expr, ne) if expr semanticEquals e => ne.toAttribute
-            }.getOrElse(e)
-        }).asInstanceOf[Seq[NamedExpression]]
-
-        val partialComputation = namedGroupingExpressions.map(_._2) ++
-          partialEvaluations.values.flatMap(_.partialEvaluations)
-
-        val namedGroupingAttributes = namedGroupingExpressions.map(_._2.toAttribute)
-
-        Some(
-          (namedGroupingAttributes,
-           rewrittenAggregateExpressions,
-           groupingExpressions,
-           partialComputation,
-           child))
-      } else {
-        None
-      }
-    case _ => None
-  }
-}
-
-
 /**
  * A pattern that finds joins with equality conditions that can be evaluated using equi-join.
  *
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
index 0ec9f0857108..b9db7838db08 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/QueryPlan.scala
@@ -137,13 +137,17 @@ abstract class QueryPlan[PlanType <: TreeNode[PlanType]] extends TreeNode[PlanTy
 
   /** Returns all of the expressions present in this query plan operator. */
   def expressions: Seq[Expression] = {
+    // Recursively find all expressions from a traversable.
+    def seqToExpressions(seq: Traversable[Any]): Traversable[Expression] = seq.flatMap {
+      case e: Expression => e :: Nil
+      case s: Traversable[_] => seqToExpressions(s)
+      case other => Nil
+    }
+
     productIterator.flatMap {
       case e: Expression => e :: Nil
       case Some(e: Expression) => e :: Nil
-      case seq: Traversable[_] => seq.flatMap {
-        case e: Expression => e :: Nil
-        case other => Nil
-      }
+      case seq: Traversable[_] => seqToExpressions(seq)
       case other => Nil
     }.toSeq
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index d771088d69de..764f8aaebddf 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.catalyst.plans.logical
 
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.aggregate.Utils
+import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.types._
 import org.apache.spark.util.collection.OpenHashSet
@@ -219,8 +219,6 @@ case class Aggregate(
     !expressions.exists(!_.resolved) && childrenResolved && !hasWindowExpressions
   }
 
-  lazy val newAggregation: Option[Aggregate] = Utils.tryConvert(this)
-
   override def output: Seq[Attribute] = aggregateExpressions.map(_.toAttribute)
 }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
index fbdd3a7776f5..5a2368e32997 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
@@ -171,16 +171,18 @@ class AnalysisErrorSuite extends AnalysisTest {
 
   test("SPARK-6452 regression test") {
     // CheckAnalysis should throw AnalysisException when Aggregate contains missing attribute(s)
+    // Since we manually construct the logical plan at here and Sum only accetp
+    // LongType, DoubleType, and DecimalType. We use LongType as the type of a.
     val plan =
       Aggregate(
         Nil,
-        Alias(Sum(AttributeReference("a", IntegerType)(exprId = ExprId(1))), "b")() :: Nil,
+        Alias(sum(AttributeReference("a", LongType)(exprId = ExprId(1))), "b")() :: Nil,
         LocalRelation(
-          AttributeReference("a", IntegerType)(exprId = ExprId(2))))
+          AttributeReference("a", LongType)(exprId = ExprId(2))))
 
     assert(plan.resolved)
 
-    assertAnalysisError(plan, "resolved attribute(s) a#1 missing from a#2" :: Nil)
+    assertAnalysisError(plan, "resolved attribute(s) a#1L missing from a#2L" :: Nil)
   }
 
   test("error test for self-join") {
@@ -196,7 +198,7 @@ class AnalysisErrorSuite extends AnalysisTest {
     val plan =
       Aggregate(
         AttributeReference("a", BinaryType)(exprId = ExprId(2)) :: Nil,
-        Alias(Sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
+        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
         LocalRelation(
           AttributeReference("a", BinaryType)(exprId = ExprId(2)),
           AttributeReference("b", IntegerType)(exprId = ExprId(1))))
@@ -207,13 +209,24 @@ class AnalysisErrorSuite extends AnalysisTest {
     val plan2 =
       Aggregate(
         AttributeReference("a", MapType(IntegerType, StringType))(exprId = ExprId(2)) :: Nil,
-        Alias(Sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
+        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
         LocalRelation(
           AttributeReference("a", MapType(IntegerType, StringType))(exprId = ExprId(2)),
           AttributeReference("b", IntegerType)(exprId = ExprId(1))))
 
     assertAnalysisError(plan2,
       "map type expression a cannot be used in grouping expression" :: Nil)
+
+    val plan3 =
+      Aggregate(
+        AttributeReference("a", ArrayType(IntegerType))(exprId = ExprId(2)) :: Nil,
+        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
+        LocalRelation(
+          AttributeReference("a", ArrayType(IntegerType))(exprId = ExprId(2)),
+          AttributeReference("b", IntegerType)(exprId = ExprId(1))))
+
+    assertAnalysisError(plan3,
+      "array type expression a cannot be used in grouping expression" :: Nil)
   }
 
   test("Join can't work on binary and map types") {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 71d2939ecffe..65f09b46afae 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -45,7 +45,7 @@ class AnalysisSuite extends AnalysisTest {
     val explode = Explode(AttributeReference("a", IntegerType, nullable = true)())
     assert(!Project(Seq(Alias(explode, "explode")()), testRelation).resolved)
 
-    assert(!Project(Seq(Alias(Count(Literal(1)), "count")()), testRelation).resolved)
+    assert(!Project(Seq(Alias(count(Literal(1)), "count")()), testRelation).resolved)
   }
 
   test("analyze project") {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
index 40c4ae792091..fed591fd90a9 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/DecimalPrecisionSuite.scala
@@ -21,6 +21,7 @@ import org.scalatest.BeforeAndAfter
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.{Union, Project, LocalRelation}
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.catalyst.{TableIdentifier, SimpleCatalystConf}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
index c9bcc68f0203..b902982add8f 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
@@ -22,6 +22,7 @@ import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.dsl.plans._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
 import org.apache.spark.sql.types.{TypeCollection, StringType}
 
@@ -140,15 +141,16 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
   }
 
   test("check types for aggregates") {
+    // We use AggregateFunction directly at here because the error will be thrown from it
+    // instead of from AggregateExpression, which is the wrapper of an AggregateFunction.
+
     // We will cast String to Double for sum and average
     assertSuccess(Sum('stringField))
-    assertSuccess(SumDistinct('stringField))
     assertSuccess(Average('stringField))
 
     assertError(Min('complexField), "min does not support ordering on type")
     assertError(Max('complexField), "max does not support ordering on type")
     assertError(Sum('booleanField), "function sum requires numeric type")
-    assertError(SumDistinct('booleanField), "function sumDistinct requires numeric type")
     assertError(Average('booleanField), "function average requires numeric type")
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ConstantFoldingSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ConstantFoldingSuite.scala
index e67606288f51..8aaefa84937c 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ConstantFoldingSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/ConstantFoldingSuite.scala
@@ -162,7 +162,7 @@ class ConstantFoldingSuite extends PlanTest {
       testRelation
         .select(
           Rand(5L) + Literal(1) as Symbol("c1"),
-          Sum('a) as Symbol("c2"))
+          sum('a) as Symbol("c2"))
 
     val optimized = Optimize.execute(originalQuery.analyze)
 
@@ -170,7 +170,7 @@ class ConstantFoldingSuite extends PlanTest {
       testRelation
         .select(
           Rand(5L) + Literal(1.0) as Symbol("c1"),
-          Sum('a) as Symbol("c2"))
+          sum('a) as Symbol("c2"))
         .analyze
 
     comparePlans(optimized, correctAnswer)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
index ed810a12808f..0290fafe879f 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
@@ -68,7 +68,7 @@ class FilterPushdownSuite extends PlanTest {
   test("column pruning for group") {
     val originalQuery =
       testRelation
-        .groupBy('a)('a, Count('b))
+        .groupBy('a)('a, count('b))
         .select('a)
 
     val optimized = Optimize.execute(originalQuery.analyze)
@@ -84,7 +84,7 @@ class FilterPushdownSuite extends PlanTest {
   test("column pruning for group with alias") {
     val originalQuery =
       testRelation
-        .groupBy('a)('a as 'c, Count('b))
+        .groupBy('a)('a as 'c, count('b))
         .select('c)
 
     val optimized = Optimize.execute(originalQuery.analyze)
@@ -656,7 +656,7 @@ class FilterPushdownSuite extends PlanTest {
 
   test("aggregate: push down filter when filter on group by expression") {
     val originalQuery = testRelation
-                        .groupBy('a)('a, Count('b) as 'c)
+                        .groupBy('a)('a, count('b) as 'c)
                         .select('a, 'c)
                         .where('a === 2)
 
@@ -664,7 +664,7 @@ class FilterPushdownSuite extends PlanTest {
 
     val correctAnswer = testRelation
                         .where('a === 2)
-                        .groupBy('a)('a, Count('b) as 'c)
+                        .groupBy('a)('a, count('b) as 'c)
                         .analyze
     comparePlans(optimized, correctAnswer)
   }
@@ -672,7 +672,7 @@ class FilterPushdownSuite extends PlanTest {
   test("aggregate: don't push down filter when filter not on group by expression") {
     val originalQuery = testRelation
                         .select('a, 'b)
-                        .groupBy('a)('a, Count('b) as 'c)
+                        .groupBy('a)('a, count('b) as 'c)
                         .where('c === 2L)
 
     val optimized = Optimize.execute(originalQuery.analyze)
@@ -683,7 +683,7 @@ class FilterPushdownSuite extends PlanTest {
   test("aggregate: push down filters partially which are subset of group by expressions") {
     val originalQuery = testRelation
                         .select('a, 'b)
-                        .groupBy('a)('a, Count('b) as 'c)
+                        .groupBy('a)('a, count('b) as 'c)
                         .where('c === 2L && 'a === 3)
 
     val optimized = Optimize.execute(originalQuery.analyze)
@@ -691,7 +691,7 @@ class FilterPushdownSuite extends PlanTest {
     val correctAnswer = testRelation
                         .select('a, 'b)
                         .where('a === 3)
-                        .groupBy('a)('a, Count('b) as 'c)
+                        .groupBy('a)('a, count('b) as 'c)
                         .where('c === 2L)
                         .analyze
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index d25807cf8d09..3b69247dc54e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -34,6 +34,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
@@ -1338,7 +1339,7 @@ class DataFrame private[sql](
       if (groupColExprIds.contains(attr.exprId)) {
         attr
       } else {
-        Alias(First(attr), attr.name)()
+        Alias(new First(attr).toAggregateExpression(), attr.name)()
       }
     }
     Aggregate(groupCols, aggCols, logicalPlan)
@@ -1381,11 +1382,11 @@ class DataFrame private[sql](
 
     // The list of summary statistics to compute, in the form of expressions.
     val statistics = List[(String, Expression => Expression)](
-      "count" -> Count,
-      "mean" -> Average,
-      "stddev" -> StddevSamp,
-      "min" -> Min,
-      "max" -> Max)
+      "count" -> ((child: Expression) => Count(child).toAggregateExpression()),
+      "mean" -> ((child: Expression) => Average(child).toAggregateExpression()),
+      "stddev" -> ((child: Expression) => StddevSamp(child).toAggregateExpression()),
+      "min" -> ((child: Expression) => Min(child).toAggregateExpression()),
+      "max" -> ((child: Expression) => Max(child).toAggregateExpression()))
 
     val outputCols = (if (cols.isEmpty) numericColumns.map(_.prettyString) else cols).toList
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index f9eab5c2e965..5babf2cc0ca2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -21,8 +21,9 @@ import scala.collection.JavaConverters._
 import scala.language.implicitConversions
 
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttribute, Star}
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, UnresolvedAlias, UnresolvedAttribute, Star}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.{Rollup, Cube, Aggregate}
 import org.apache.spark.sql.types.NumericType
 
@@ -70,7 +71,7 @@ class GroupedData protected[sql](
     }
   }
 
-  private[this] def aggregateNumericColumns(colNames: String*)(f: Expression => Expression)
+  private[this] def aggregateNumericColumns(colNames: String*)(f: Expression => AggregateFunction)
     : DataFrame = {
 
     val columnExprs = if (colNames.isEmpty) {
@@ -88,30 +89,28 @@ class GroupedData protected[sql](
         namedExpr
       }
     }
-    toDF(columnExprs.map(f))
+    toDF(columnExprs.map(expr => f(expr).toAggregateExpression()))
   }
 
   private[this] def strToExpr(expr: String): (Expression => Expression) = {
-    expr.toLowerCase match {
-      case "avg" | "average" | "mean" => Average
-      case "max" => Max
-      case "min" => Min
-      case "stddev" | "std" => StddevSamp
-      case "stddev_pop" => StddevPop
-      case "stddev_samp" => StddevSamp
-      case "variance" => VarianceSamp
-      case "var_pop" => VariancePop
-      case "var_samp" => VarianceSamp
-      case "sum" => Sum
-      case "skewness" => Skewness
-      case "kurtosis" => Kurtosis
-      case "count" | "size" =>
-        // Turn count(*) into count(1)
-        (inputExpr: Expression) => inputExpr match {
-          case s: Star => Count(Literal(1))
-          case _ => Count(inputExpr)
-        }
+    val exprToFunc: (Expression => Expression) = {
+      (inputExpr: Expression) => expr.toLowerCase match {
+        // We special handle a few cases that have alias that are not in function registry.
+        case "avg" | "average" | "mean" =>
+          UnresolvedFunction("avg", inputExpr :: Nil, isDistinct = false)
+        case "stddev" | "std" =>
+          UnresolvedFunction("stddev", inputExpr :: Nil, isDistinct = false)
+        // Also special handle count because we need to take care count(*).
+        case "count" | "size" =>
+          // Turn count(*) into count(1)
+          inputExpr match {
+            case s: Star => Count(Literal(1)).toAggregateExpression()
+            case _ => Count(inputExpr).toAggregateExpression()
+          }
+        case name => UnresolvedFunction(name, inputExpr :: Nil, isDistinct = false)
+      }
     }
+    (inputExpr: Expression) => exprToFunc(inputExpr)
   }
 
   /**
@@ -213,7 +212,7 @@ class GroupedData protected[sql](
    *
    * @since 1.3.0
    */
-  def count(): DataFrame = toDF(Seq(Alias(Count(Literal(1)), "count")()))
+  def count(): DataFrame = toDF(Seq(Alias(Count(Literal(1)).toAggregateExpression(), "count")()))
 
   /**
    * Compute the average value for each numeric columns for each group. This is an alias for `avg`.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index ed8b634ad563..b7314189b540 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -448,15 +448,24 @@ private[spark] object SQLConf {
     defaultValue = Some(true),
     isPublic = false)
 
-  val USE_SQL_AGGREGATE2 = booleanConf("spark.sql.useAggregate2",
-    defaultValue = Some(true), doc = "<TODO>")
-
   val RUN_SQL_ON_FILES = booleanConf("spark.sql.runSQLOnFiles",
     defaultValue = Some(true),
     isPublic = false,
     doc = "When true, we could use `datasource`.`path` as table in SQL query"
   )
 
+  val SPECIALIZE_SINGLE_DISTINCT_AGG_PLANNING =
+    booleanConf("spark.sql.specializeSingleDistinctAggPlanning",
+      defaultValue = Some(true),
+      isPublic = false,
+      doc = "When true, if a query only has a single distinct column and it has " +
+        "grouping expressions, we will use our planner rule to handle this distinct " +
+        "column (other cases are handled by DistinctAggregationRewriter). " +
+        "When false, we will always use DistinctAggregationRewriter to plan " +
+        "aggregation queries with DISTINCT keyword. This is an internal flag that is " +
+        "used to benchmark the performance impact of using DistinctAggregationRewriter to " +
+        "plan aggregation queries with a single distinct column.")
+
   object Deprecated {
     val MAPRED_REDUCE_TASKS = "mapred.reduce.tasks"
     val EXTERNAL_SORT = "spark.sql.planner.externalSort"
@@ -532,8 +541,6 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def unsafeEnabled: Boolean = getConf(UNSAFE_ENABLED, getConf(TUNGSTEN_ENABLED))
 
-  private[spark] def useSqlAggregate2: Boolean = getConf(USE_SQL_AGGREGATE2)
-
   private[spark] def autoBroadcastJoinThreshold: Int = getConf(AUTO_BROADCASTJOIN_THRESHOLD)
 
   private[spark] def defaultSizeInBytes: Long =
@@ -575,6 +582,9 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def runSQLOnFile: Boolean = getConf(RUN_SQL_ON_FILES)
 
+  protected[spark] override def specializeSingleDistinctAggPlanning: Boolean =
+    getConf(SPECIALIZE_SINGLE_DISTINCT_AGG_PLANNING)
+
   /** ********************** SQLConf functionality methods ************ */
 
   /** Set Spark SQL configuration properties. */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala
deleted file mode 100644
index 6f3f1bd97ad5..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Aggregate.scala
+++ /dev/null
@@ -1,205 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution
-
-import java.util.HashMap
-
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.errors._
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.metric.SQLMetrics
-
-/**
- * Groups input data by `groupingExpressions` and computes the `aggregateExpressions` for each
- * group.
- *
- * @param partial if true then aggregation is done partially on local data without shuffling to
- *                ensure all values where `groupingExpressions` are equal are present.
- * @param groupingExpressions expressions that are evaluated to determine grouping.
- * @param aggregateExpressions expressions that are computed for each group.
- * @param child the input data source.
- */
-case class Aggregate(
-    partial: Boolean,
-    groupingExpressions: Seq[Expression],
-    aggregateExpressions: Seq[NamedExpression],
-    child: SparkPlan)
-  extends UnaryNode {
-
-  override private[sql] lazy val metrics = Map(
-    "numInputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of input rows"),
-    "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"))
-
-  override def requiredChildDistribution: List[Distribution] = {
-    if (partial) {
-      UnspecifiedDistribution :: Nil
-    } else {
-      if (groupingExpressions == Nil) {
-        AllTuples :: Nil
-      } else {
-        ClusteredDistribution(groupingExpressions) :: Nil
-      }
-    }
-  }
-
-  override def output: Seq[Attribute] = aggregateExpressions.map(_.toAttribute)
-
-  /**
-   * An aggregate that needs to be computed for each row in a group.
-   *
-   * @param unbound Unbound version of this aggregate, used for result substitution.
-   * @param aggregate A bound copy of this aggregate used to create a new aggregation buffer.
-   * @param resultAttribute An attribute used to refer to the result of this aggregate in the final
-   *                        output.
-   */
-  case class ComputedAggregate(
-      unbound: AggregateExpression1,
-      aggregate: AggregateExpression1,
-      resultAttribute: AttributeReference)
-
-  /** A list of aggregates that need to be computed for each group. */
-  private[this] val computedAggregates = aggregateExpressions.flatMap { agg =>
-    agg.collect {
-      case a: AggregateExpression1 =>
-        ComputedAggregate(
-          a,
-          BindReferences.bindReference(a, child.output),
-          AttributeReference(s"aggResult:$a", a.dataType, a.nullable)())
-    }
-  }.toArray
-
-  /** The schema of the result of all aggregate evaluations */
-  private[this] val computedSchema = computedAggregates.map(_.resultAttribute)
-
-  /** Creates a new aggregate buffer for a group. */
-  private[this] def newAggregateBuffer(): Array[AggregateFunction1] = {
-    val buffer = new Array[AggregateFunction1](computedAggregates.length)
-    var i = 0
-    while (i < computedAggregates.length) {
-      buffer(i) = computedAggregates(i).aggregate.newInstance()
-      i += 1
-    }
-    buffer
-  }
-
-  /** Named attributes used to substitute grouping attributes into the final result. */
-  private[this] val namedGroups = groupingExpressions.map {
-    case ne: NamedExpression => ne -> ne.toAttribute
-    case e => e -> Alias(e, s"groupingExpr:$e")().toAttribute
-  }
-
-  /**
-   * A map of substitutions that are used to insert the aggregate expressions and grouping
-   * expression into the final result expression.
-   */
-  private[this] val resultMap =
-    (computedAggregates.map { agg => agg.unbound -> agg.resultAttribute } ++ namedGroups).toMap
-
-  /**
-   * Substituted version of aggregateExpressions expressions which are used to compute final
-   * output rows given a group and the result of all aggregate computations.
-   */
-  private[this] val resultExpressions = aggregateExpressions.map { agg =>
-    agg.transform {
-      case e: Expression if resultMap.contains(e) => resultMap(e)
-    }
-  }
-
-  protected override def doExecute(): RDD[InternalRow] = attachTree(this, "execute") {
-    val numInputRows = longMetric("numInputRows")
-    val numOutputRows = longMetric("numOutputRows")
-    if (groupingExpressions.isEmpty) {
-      child.execute().mapPartitions { iter =>
-        val buffer = newAggregateBuffer()
-        var currentRow: InternalRow = null
-        while (iter.hasNext) {
-          currentRow = iter.next()
-          numInputRows += 1
-          var i = 0
-          while (i < buffer.length) {
-            buffer(i).update(currentRow)
-            i += 1
-          }
-        }
-        val resultProjection = new InterpretedProjection(resultExpressions, computedSchema)
-        val aggregateResults = new GenericMutableRow(computedAggregates.length)
-
-        var i = 0
-        while (i < buffer.length) {
-          aggregateResults(i) = buffer(i).eval(EmptyRow)
-          i += 1
-        }
-
-        numOutputRows += 1
-        Iterator(resultProjection(aggregateResults))
-      }
-    } else {
-      child.execute().mapPartitions { iter =>
-        val hashTable = new HashMap[InternalRow, Array[AggregateFunction1]]
-        val groupingProjection = new InterpretedMutableProjection(groupingExpressions, child.output)
-
-        var currentRow: InternalRow = null
-        while (iter.hasNext) {
-          currentRow = iter.next()
-          numInputRows += 1
-          val currentGroup = groupingProjection(currentRow)
-          var currentBuffer = hashTable.get(currentGroup)
-          if (currentBuffer == null) {
-            currentBuffer = newAggregateBuffer()
-            hashTable.put(currentGroup.copy(), currentBuffer)
-          }
-
-          var i = 0
-          while (i < currentBuffer.length) {
-            currentBuffer(i).update(currentRow)
-            i += 1
-          }
-        }
-
-        new Iterator[InternalRow] {
-          private[this] val hashTableIter = hashTable.entrySet().iterator()
-          private[this] val aggregateResults = new GenericMutableRow(computedAggregates.length)
-          private[this] val resultProjection =
-            new InterpretedMutableProjection(
-              resultExpressions, computedSchema ++ namedGroups.map(_._2))
-          private[this] val joinedRow = new JoinedRow
-
-          override final def hasNext: Boolean = hashTableIter.hasNext
-
-          override final def next(): InternalRow = {
-            val currentEntry = hashTableIter.next()
-            val currentGroup = currentEntry.getKey
-            val currentBuffer = currentEntry.getValue
-            numOutputRows += 1
-
-            var i = 0
-            while (i < currentBuffer.length) {
-              // Evaluating an aggregate buffer returns the result.  No row is required since we
-              // already added all rows in the group using update.
-              aggregateResults(i) = currentBuffer(i).eval(EmptyRow)
-              i += 1
-            }
-            resultProjection(joinedRow(aggregateResults, currentGroup))
-          }
-        }
-      }
-    }
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
index 55e95769d3fa..91530bd63798 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Expand.scala
@@ -45,6 +45,9 @@ case class Expand(
   override def canProcessUnsafeRows: Boolean = true
   override def canProcessSafeRows: Boolean = true
 
+  override def references: AttributeSet =
+    AttributeSet(projections.flatten.flatMap(_.references))
+
   private[this] val projection = {
     if (outputsUnsafeRows) {
       (exprs: Seq[Expression]) => UnsafeProjection.create(exprs, child.output)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
index 0f98fe88b210..a10d1edcc91a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
@@ -38,7 +38,6 @@ class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
       DataSourceStrategy ::
       DDLStrategy ::
       TakeOrderedAndProject ::
-      HashAggregation ::
       Aggregation ::
       LeftSemiJoin ::
       EquiJoinSelection ::
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index dd3bb33c5728..d65cb1bae7fb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.execution
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression2, Utils}
+import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
 import org.apache.spark.sql.catalyst.planning._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical.{BroadcastHint, LogicalPlan}
@@ -146,148 +146,104 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
     }
   }
 
-  object HashAggregation extends Strategy {
-    def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
-      // Aggregations that can be performed in two phases, before and after the shuffle.
-      case PartialAggregation(
-          namedGroupingAttributes,
-          rewrittenAggregateExpressions,
-          groupingExpressions,
-          partialComputation,
-          child) if !canBeConvertedToNewAggregation(plan) =>
-        execution.Aggregate(
-          partial = false,
-          namedGroupingAttributes,
-          rewrittenAggregateExpressions,
-          execution.Aggregate(
-            partial = true,
-            groupingExpressions,
-            partialComputation,
-            planLater(child))) :: Nil
-
-      case _ => Nil
-    }
-
-    def canBeConvertedToNewAggregation(plan: LogicalPlan): Boolean = plan match {
-      case a: logical.Aggregate =>
-        if (sqlContext.conf.useSqlAggregate2 && sqlContext.conf.codegenEnabled) {
-          a.newAggregation.isDefined
-        } else {
-          Utils.checkInvalidAggregateFunction2(a)
-          false
-        }
-      case _ => false
-    }
-
-    def allAggregates(exprs: Seq[Expression]): Seq[AggregateExpression1] =
-      exprs.flatMap(_.collect { case a: AggregateExpression1 => a })
-  }
-
   /**
    * Used to plan the aggregate operator for expressions based on the AggregateFunction2 interface.
    */
   object Aggregation extends Strategy {
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
-      case p: logical.Aggregate if sqlContext.conf.useSqlAggregate2 &&
-          sqlContext.conf.codegenEnabled =>
-        val converted = p.newAggregation
-        converted match {
-          case None => Nil // Cannot convert to new aggregation code path.
-          case Some(logical.Aggregate(groupingExpressions, resultExpressions, child)) =>
-            // A single aggregate expression might appear multiple times in resultExpressions.
-            // In order to avoid evaluating an individual aggregate function multiple times, we'll
-            // build a set of the distinct aggregate expressions and build a function which can
-            // be used to re-write expressions so that they reference the single copy of the
-            // aggregate function which actually gets computed.
-            val aggregateExpressions = resultExpressions.flatMap { expr =>
-              expr.collect {
-                case agg: AggregateExpression2 => agg
-              }
-            }.distinct
-            // For those distinct aggregate expressions, we create a map from the
-            // aggregate function to the corresponding attribute of the function.
-            val aggregateFunctionToAttribute = aggregateExpressions.map { agg =>
-              val aggregateFunction = agg.aggregateFunction
-              val attribute = Alias(aggregateFunction, aggregateFunction.toString)().toAttribute
-              (aggregateFunction, agg.isDistinct) -> attribute
-            }.toMap
-
-            val (functionsWithDistinct, functionsWithoutDistinct) =
-              aggregateExpressions.partition(_.isDistinct)
-            if (functionsWithDistinct.map(_.aggregateFunction.children).distinct.length > 1) {
-              // This is a sanity check. We should not reach here when we have multiple distinct
-              // column sets (aggregate.NewAggregation will not match).
-              sys.error(
-                "Multiple distinct column sets are not supported by the new aggregation" +
-                  "code path.")
-            }
+      case logical.Aggregate(groupingExpressions, resultExpressions, child) =>
+        // A single aggregate expression might appear multiple times in resultExpressions.
+        // In order to avoid evaluating an individual aggregate function multiple times, we'll
+        // build a set of the distinct aggregate expressions and build a function which can
+        // be used to re-write expressions so that they reference the single copy of the
+        // aggregate function which actually gets computed.
+        val aggregateExpressions = resultExpressions.flatMap { expr =>
+          expr.collect {
+            case agg: AggregateExpression => agg
+          }
+        }.distinct
+        // For those distinct aggregate expressions, we create a map from the
+        // aggregate function to the corresponding attribute of the function.
+        val aggregateFunctionToAttribute = aggregateExpressions.map { agg =>
+          val aggregateFunction = agg.aggregateFunction
+          val attribute = Alias(aggregateFunction, aggregateFunction.toString)().toAttribute
+          (aggregateFunction, agg.isDistinct) -> attribute
+        }.toMap
+
+        val (functionsWithDistinct, functionsWithoutDistinct) =
+          aggregateExpressions.partition(_.isDistinct)
+        if (functionsWithDistinct.map(_.aggregateFunction.children).distinct.length > 1) {
+          // This is a sanity check. We should not reach here when we have multiple distinct
+          // column sets. Our MultipleDistinctRewriter should take care this case.
+          sys.error("You hit a query analyzer bug. Please report your query to " +
+            "Spark user mailing list.")
+        }
 
-            val namedGroupingExpressions = groupingExpressions.map {
-              case ne: NamedExpression => ne -> ne
-              // If the expression is not a NamedExpressions, we add an alias.
-              // So, when we generate the result of the operator, the Aggregate Operator
-              // can directly get the Seq of attributes representing the grouping expressions.
-              case other =>
-                val withAlias = Alias(other, other.toString)()
-                other -> withAlias
-            }
-            val groupExpressionMap = namedGroupingExpressions.toMap
-
-            // The original `resultExpressions` are a set of expressions which may reference
-            // aggregate expressions, grouping column values, and constants. When aggregate operator
-            // emits output rows, we will use `resultExpressions` to generate an output projection
-            // which takes the grouping columns and final aggregate result buffer as input.
-            // Thus, we must re-write the result expressions so that their attributes match up with
-            // the attributes of the final result projection's input row:
-            val rewrittenResultExpressions = resultExpressions.map { expr =>
-              expr.transformDown {
-                case AggregateExpression2(aggregateFunction, _, isDistinct) =>
-                  // The final aggregation buffer's attributes will be `finalAggregationAttributes`,
-                  // so replace each aggregate expression by its corresponding attribute in the set:
-                  aggregateFunctionToAttribute(aggregateFunction, isDistinct)
-                case expression =>
-                  // Since we're using `namedGroupingAttributes` to extract the grouping key
-                  // columns, we need to replace grouping key expressions with their corresponding
-                  // attributes. We do not rely on the equality check at here since attributes may
-                  // differ cosmetically. Instead, we use semanticEquals.
-                  groupExpressionMap.collectFirst {
-                    case (expr, ne) if expr semanticEquals expression => ne.toAttribute
-                  }.getOrElse(expression)
-              }.asInstanceOf[NamedExpression]
+        val namedGroupingExpressions = groupingExpressions.map {
+          case ne: NamedExpression => ne -> ne
+          // If the expression is not a NamedExpressions, we add an alias.
+          // So, when we generate the result of the operator, the Aggregate Operator
+          // can directly get the Seq of attributes representing the grouping expressions.
+          case other =>
+            val withAlias = Alias(other, other.toString)()
+            other -> withAlias
+        }
+        val groupExpressionMap = namedGroupingExpressions.toMap
+
+        // The original `resultExpressions` are a set of expressions which may reference
+        // aggregate expressions, grouping column values, and constants. When aggregate operator
+        // emits output rows, we will use `resultExpressions` to generate an output projection
+        // which takes the grouping columns and final aggregate result buffer as input.
+        // Thus, we must re-write the result expressions so that their attributes match up with
+        // the attributes of the final result projection's input row:
+        val rewrittenResultExpressions = resultExpressions.map { expr =>
+          expr.transformDown {
+            case AggregateExpression(aggregateFunction, _, isDistinct) =>
+              // The final aggregation buffer's attributes will be `finalAggregationAttributes`,
+              // so replace each aggregate expression by its corresponding attribute in the set:
+              aggregateFunctionToAttribute(aggregateFunction, isDistinct)
+            case expression =>
+              // Since we're using `namedGroupingAttributes` to extract the grouping key
+              // columns, we need to replace grouping key expressions with their corresponding
+              // attributes. We do not rely on the equality check at here since attributes may
+              // differ cosmetically. Instead, we use semanticEquals.
+              groupExpressionMap.collectFirst {
+                case (expr, ne) if expr semanticEquals expression => ne.toAttribute
+              }.getOrElse(expression)
+          }.asInstanceOf[NamedExpression]
+        }
+
+        val aggregateOperator =
+          if (aggregateExpressions.map(_.aggregateFunction).exists(!_.supportsPartial)) {
+            if (functionsWithDistinct.nonEmpty) {
+              sys.error("Distinct columns cannot exist in Aggregate operator containing " +
+                "aggregate functions which don't support partial aggregation.")
+            } else {
+              aggregate.Utils.planAggregateWithoutPartial(
+                namedGroupingExpressions.map(_._2),
+                aggregateExpressions,
+                aggregateFunctionToAttribute,
+                rewrittenResultExpressions,
+                planLater(child))
             }
+          } else if (functionsWithDistinct.isEmpty) {
+            aggregate.Utils.planAggregateWithoutDistinct(
+              namedGroupingExpressions.map(_._2),
+              aggregateExpressions,
+              aggregateFunctionToAttribute,
+              rewrittenResultExpressions,
+              planLater(child))
+          } else {
+            aggregate.Utils.planAggregateWithOneDistinct(
+              namedGroupingExpressions.map(_._2),
+              functionsWithDistinct,
+              functionsWithoutDistinct,
+              aggregateFunctionToAttribute,
+              rewrittenResultExpressions,
+              planLater(child))
+          }
 
-            val aggregateOperator =
-              if (aggregateExpressions.map(_.aggregateFunction).exists(!_.supportsPartial)) {
-                if (functionsWithDistinct.nonEmpty) {
-                  sys.error("Distinct columns cannot exist in Aggregate operator containing " +
-                    "aggregate functions which don't support partial aggregation.")
-                } else {
-                  aggregate.Utils.planAggregateWithoutPartial(
-                    namedGroupingExpressions.map(_._2),
-                    aggregateExpressions,
-                    aggregateFunctionToAttribute,
-                    rewrittenResultExpressions,
-                    planLater(child))
-                }
-              } else if (functionsWithDistinct.isEmpty) {
-                aggregate.Utils.planAggregateWithoutDistinct(
-                  namedGroupingExpressions.map(_._2),
-                  aggregateExpressions,
-                  aggregateFunctionToAttribute,
-                  rewrittenResultExpressions,
-                  planLater(child))
-              } else {
-                aggregate.Utils.planAggregateWithOneDistinct(
-                  namedGroupingExpressions.map(_._2),
-                  functionsWithDistinct,
-                  functionsWithoutDistinct,
-                  aggregateFunctionToAttribute,
-                  rewrittenResultExpressions,
-                  planLater(child))
-              }
-
-            aggregateOperator
-        }
+        aggregateOperator
 
       case _ => Nil
     }
@@ -422,18 +378,6 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         execution.Filter(condition, planLater(child)) :: Nil
       case e @ logical.Expand(_, _, child) =>
         execution.Expand(e.projections, e.output, planLater(child)) :: Nil
-      case a @ logical.Aggregate(group, agg, child) => {
-        val useNewAggregation = sqlContext.conf.useSqlAggregate2 && sqlContext.conf.codegenEnabled
-        if (useNewAggregation && a.newAggregation.isDefined) {
-          // If this logical.Aggregate can be planned to use new aggregation code path
-          // (i.e. it can be planned by the Strategy Aggregation), we will not use the old
-          // aggregation code path.
-          Nil
-        } else {
-          Utils.checkInvalidAggregateFunction2(a)
-          execution.Aggregate(partial = false, group, agg, planLater(child)) :: Nil
-        }
-      }
       case logical.Window(projectList, windowExprs, partitionSpec, orderSpec, child) =>
         execution.Window(
           projectList, windowExprs, partitionSpec, orderSpec, planLater(child)) :: Nil
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
index 99fb7a40b72e..008478a6a0e1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
@@ -35,9 +35,9 @@ import scala.collection.mutable.ArrayBuffer
 abstract class AggregationIterator(
     groupingKeyAttributes: Seq[Attribute],
     valueAttributes: Seq[Attribute],
-    nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateExpressions: Seq[AggregateExpression],
     nonCompleteAggregateAttributes: Seq[Attribute],
-    completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateExpressions: Seq[AggregateExpression],
     completeAggregateAttributes: Seq[Attribute],
     initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
@@ -76,14 +76,14 @@ abstract class AggregationIterator(
 
   // Initialize all AggregateFunctions by binding references if necessary,
   // and set inputBufferOffset and mutableBufferOffset.
-  protected val allAggregateFunctions: Array[AggregateFunction2] = {
+  protected val allAggregateFunctions: Array[AggregateFunction] = {
     var mutableBufferOffset = 0
     var inputBufferOffset: Int = initialInputBufferOffset
-    val functions = new Array[AggregateFunction2](allAggregateExpressions.length)
+    val functions = new Array[AggregateFunction](allAggregateExpressions.length)
     var i = 0
     while (i < allAggregateExpressions.length) {
       val func = allAggregateExpressions(i).aggregateFunction
-      val funcWithBoundReferences: AggregateFunction2 = allAggregateExpressions(i).mode match {
+      val funcWithBoundReferences: AggregateFunction = allAggregateExpressions(i).mode match {
         case Partial | Complete if func.isInstanceOf[ImperativeAggregate] =>
           // We need to create BoundReferences if the function is not an
           // expression-based aggregate function (it does not support code-gen) and the mode of
@@ -135,7 +135,7 @@ abstract class AggregationIterator(
   }
 
   // All AggregateFunctions functions with mode Partial, PartialMerge, or Final.
-  private[this] val nonCompleteAggregateFunctions: Array[AggregateFunction2] =
+  private[this] val nonCompleteAggregateFunctions: Array[AggregateFunction] =
     allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
 
   // All imperative aggregate functions with mode Partial, PartialMerge, or Final.
@@ -172,7 +172,7 @@ abstract class AggregationIterator(
       case (Some(Partial), None) =>
         val updateExpressions = nonCompleteAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.updateExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val expressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
@@ -204,7 +204,7 @@ abstract class AggregationIterator(
         //    allAggregateFunctions.flatMap(_.cloneBufferAttributes)
         val mergeExpressions = nonCompleteAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.mergeExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         // This projection is used to merge buffer values for all expression-based aggregates.
         val expressionAggMergeProjection =
@@ -225,7 +225,7 @@ abstract class AggregationIterator(
 
       // Final-Complete
       case (Some(Final), Some(Complete)) =>
-        val completeAggregateFunctions: Array[AggregateFunction2] =
+        val completeAggregateFunctions: Array[AggregateFunction] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
         // All imperative aggregate functions with mode Complete.
         val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
@@ -248,7 +248,7 @@ abstract class AggregationIterator(
         val mergeExpressions =
           nonCompleteAggregateFunctions.flatMap {
             case ae: DeclarativeAggregate => ae.mergeExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+            case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           } ++ completeOffsetExpressions
         val finalExpressionAggMergeProjection =
           newMutableProjection(mergeExpressions, mergeInputSchema)()
@@ -256,7 +256,7 @@ abstract class AggregationIterator(
         val updateExpressions =
           finalOffsetExpressions ++ completeAggregateFunctions.flatMap {
             case ae: DeclarativeAggregate => ae.updateExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+            case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
         val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
@@ -282,7 +282,7 @@ abstract class AggregationIterator(
 
       // Complete-only
       case (None, Some(Complete)) =>
-        val completeAggregateFunctions: Array[AggregateFunction2] =
+        val completeAggregateFunctions: Array[AggregateFunction] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
         // All imperative aggregate functions with mode Complete.
         val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
@@ -291,7 +291,7 @@ abstract class AggregationIterator(
         val updateExpressions =
           completeAggregateFunctions.flatMap {
             case ae: DeclarativeAggregate => ae.updateExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+            case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           }
         val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferSchema ++ valueAttributes)()
@@ -353,7 +353,7 @@ abstract class AggregationIterator(
           allAggregateFunctions.flatMap(_.aggBufferAttributes)
         val evalExpressions = allAggregateFunctions.map {
           case ae: DeclarativeAggregate => ae.evaluateExpression
-          case agg: AggregateFunction2 => NoOp
+          case agg: AggregateFunction => NoOp
         }
         val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferSchemata)()
         val aggregateResultSchema = nonCompleteAggregateAttributes ++ completeAggregateAttributes
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
index 4d37106e007f..fb7f30c2aec9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
@@ -29,9 +29,9 @@ import org.apache.spark.sql.execution.metric.SQLMetrics
 case class SortBasedAggregate(
     requiredChildDistributionExpressions: Option[Seq[Expression]],
     groupingExpressions: Seq[NamedExpression],
-    nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateExpressions: Seq[AggregateExpression],
     nonCompleteAggregateAttributes: Seq[Attribute],
-    completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateExpressions: Seq[AggregateExpression],
     completeAggregateAttributes: Seq[Attribute],
     initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
index 64c673064f57..fe5c3195f867 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregationIterator.scala
@@ -19,11 +19,11 @@ package org.apache.spark.sql.execution.aggregate
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression2, AggregateFunction2}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression, AggregateFunction}
 import org.apache.spark.sql.execution.metric.LongSQLMetric
 
 /**
- * An iterator used to evaluate [[AggregateFunction2]]. It assumes the input rows have been
+ * An iterator used to evaluate [[AggregateFunction]]. It assumes the input rows have been
  * sorted by values of [[groupingKeyAttributes]].
  */
 class SortBasedAggregationIterator(
@@ -31,9 +31,9 @@ class SortBasedAggregationIterator(
     groupingKeyAttributes: Seq[Attribute],
     valueAttributes: Seq[Attribute],
     inputIterator: Iterator[InternalRow],
-    nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateExpressions: Seq[AggregateExpression],
     nonCompleteAggregateAttributes: Seq[Attribute],
-    completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateExpressions: Seq[AggregateExpression],
     completeAggregateAttributes: Seq[Attribute],
     initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index 15616915f736..1edde1e5a16d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -21,7 +21,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression2
+import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
 import org.apache.spark.sql.catalyst.plans.physical._
 import org.apache.spark.sql.execution.metric.SQLMetrics
 import org.apache.spark.sql.execution.{SparkPlan, UnaryNode, UnsafeFixedWidthAggregationMap}
@@ -30,9 +30,9 @@ import org.apache.spark.sql.types.StructType
 case class TungstenAggregate(
     requiredChildDistributionExpressions: Option[Seq[Expression]],
     groupingExpressions: Seq[NamedExpression],
-    nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateExpressions: Seq[AggregateExpression],
     nonCompleteAggregateAttributes: Seq[Attribute],
-    completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateExpressions: Seq[AggregateExpression],
     completeAggregateAttributes: Seq[Attribute],
     initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
index ce8d592c368e..04391443920a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregationIterator.scala
@@ -64,12 +64,12 @@ import org.apache.spark.sql.types.StructType
  * @param groupingExpressions
  *   expressions for grouping keys
  * @param nonCompleteAggregateExpressions
- *   [[AggregateExpression2]] containing [[AggregateFunction2]]s with mode [[Partial]],
- *   [[PartialMerge]], or [[Final]].
+ * [[AggregateExpression]] containing [[AggregateFunction]]s with mode [[Partial]],
+ * [[PartialMerge]], or [[Final]].
  * @param nonCompleteAggregateAttributes the attributes of the nonCompleteAggregateExpressions'
  *   outputs when they are stored in the final aggregation buffer.
  * @param completeAggregateExpressions
- *   [[AggregateExpression2]] containing [[AggregateFunction2]]s with mode [[Complete]].
+ * [[AggregateExpression]] containing [[AggregateFunction]]s with mode [[Complete]].
  * @param completeAggregateAttributes the attributes of completeAggregateExpressions' outputs
  *   when they are stored in the final aggregation buffer.
  * @param resultExpressions
@@ -83,9 +83,9 @@ import org.apache.spark.sql.types.StructType
  */
 class TungstenAggregationIterator(
     groupingExpressions: Seq[NamedExpression],
-    nonCompleteAggregateExpressions: Seq[AggregateExpression2],
+    nonCompleteAggregateExpressions: Seq[AggregateExpression],
     nonCompleteAggregateAttributes: Seq[Attribute],
-    completeAggregateExpressions: Seq[AggregateExpression2],
+    completeAggregateExpressions: Seq[AggregateExpression],
     completeAggregateAttributes: Seq[Attribute],
     initialInputBufferOffset: Int,
     resultExpressions: Seq[NamedExpression],
@@ -106,7 +106,7 @@ class TungstenAggregationIterator(
   // A Seq containing all AggregateExpressions.
   // It is important that all AggregateExpressions with the mode Partial, PartialMerge or Final
   // are at the beginning of the allAggregateExpressions.
-  private[this] val allAggregateExpressions: Seq[AggregateExpression2] =
+  private[this] val allAggregateExpressions: Seq[AggregateExpression] =
     nonCompleteAggregateExpressions ++ completeAggregateExpressions
 
   // Check to make sure we do not have more than three modes in our AggregateExpressions.
@@ -150,10 +150,10 @@ class TungstenAggregationIterator(
   // Initialize all AggregateFunctions by binding references, if necessary,
   // and setting inputBufferOffset and mutableBufferOffset.
   private def initializeAllAggregateFunctions(
-      startingInputBufferOffset: Int): Array[AggregateFunction2] = {
+      startingInputBufferOffset: Int): Array[AggregateFunction] = {
     var mutableBufferOffset = 0
     var inputBufferOffset: Int = startingInputBufferOffset
-    val functions = new Array[AggregateFunction2](allAggregateExpressions.length)
+    val functions = new Array[AggregateFunction](allAggregateExpressions.length)
     var i = 0
     while (i < allAggregateExpressions.length) {
       val func = allAggregateExpressions(i).aggregateFunction
@@ -195,7 +195,7 @@ class TungstenAggregationIterator(
     functions
   }
 
-  private[this] var allAggregateFunctions: Array[AggregateFunction2] =
+  private[this] var allAggregateFunctions: Array[AggregateFunction] =
     initializeAllAggregateFunctions(initialInputBufferOffset)
 
   // Positions of those imperative aggregate functions in allAggregateFunctions.
@@ -263,7 +263,7 @@ class TungstenAggregationIterator(
       case (Some(Partial), None) =>
         val updateExpressions = allAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.updateExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val imperativeAggregateFunctions: Array[ImperativeAggregate] =
           allAggregateFunctions.collect { case func: ImperativeAggregate => func}
@@ -286,7 +286,7 @@ class TungstenAggregationIterator(
       case (Some(PartialMerge), None) | (Some(Final), None) =>
         val mergeExpressions = allAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.mergeExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val imperativeAggregateFunctions: Array[ImperativeAggregate] =
           allAggregateFunctions.collect { case func: ImperativeAggregate => func}
@@ -307,11 +307,11 @@ class TungstenAggregationIterator(
 
       // Final-Complete
       case (Some(Final), Some(Complete)) =>
-        val completeAggregateFunctions: Array[AggregateFunction2] =
+        val completeAggregateFunctions: Array[AggregateFunction] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
         val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
           completeAggregateFunctions.collect { case func: ImperativeAggregate => func }
-        val nonCompleteAggregateFunctions: Array[AggregateFunction2] =
+        val nonCompleteAggregateFunctions: Array[AggregateFunction] =
           allAggregateFunctions.take(nonCompleteAggregateExpressions.length)
         val nonCompleteImperativeAggregateFunctions: Array[ImperativeAggregate] =
           nonCompleteAggregateFunctions.collect { case func: ImperativeAggregate => func }
@@ -321,7 +321,7 @@ class TungstenAggregationIterator(
         val mergeExpressions =
           nonCompleteAggregateFunctions.flatMap {
             case ae: DeclarativeAggregate => ae.mergeExpressions
-            case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+            case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
           } ++ completeOffsetExpressions
         val finalMergeProjection =
           newMutableProjection(mergeExpressions, aggregationBufferAttributes ++ inputAttributes)()
@@ -331,7 +331,7 @@ class TungstenAggregationIterator(
           Seq.fill(nonCompleteAggregateFunctions.map(_.aggBufferAttributes.length).sum)(NoOp)
         val updateExpressions = finalOffsetExpressions ++ completeAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.updateExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val completeUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
@@ -358,7 +358,7 @@ class TungstenAggregationIterator(
 
       // Complete-only
       case (None, Some(Complete)) =>
-        val completeAggregateFunctions: Array[AggregateFunction2] =
+        val completeAggregateFunctions: Array[AggregateFunction] =
           allAggregateFunctions.takeRight(completeAggregateExpressions.length)
         // All imperative aggregate functions with mode Complete.
         val completeImperativeAggregateFunctions: Array[ImperativeAggregate] =
@@ -366,7 +366,7 @@ class TungstenAggregationIterator(
 
         val updateExpressions = completeAggregateFunctions.flatMap {
           case ae: DeclarativeAggregate => ae.updateExpressions
-          case agg: AggregateFunction2 => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
+          case agg: AggregateFunction => Seq.fill(agg.aggBufferAttributes.length)(NoOp)
         }
         val completeExpressionAggUpdateProjection =
           newMutableProjection(updateExpressions, aggregationBufferAttributes ++ inputAttributes)()
@@ -414,7 +414,7 @@ class TungstenAggregationIterator(
         val joinedRow = new JoinedRow()
         val evalExpressions = allAggregateFunctions.map {
           case ae: DeclarativeAggregate => ae.evaluateExpression
-          case agg: AggregateFunction2 => NoOp
+          case agg: AggregateFunction => NoOp
         }
         val expressionAggEvalProjection = newMutableProjection(evalExpressions, bufferAttributes)()
         // These are the attributes of the row produced by `expressionAggEvalProjection`
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
index d2f56e0fc14a..20359c1e540e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/udaf.scala
@@ -22,7 +22,7 @@ import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateMutableProjection
 import org.apache.spark.sql.catalyst.expressions.{MutableRow, InterpretedMutableProjection, AttributeReference, Expression}
-import org.apache.spark.sql.catalyst.expressions.aggregate.{ImperativeAggregate, AggregateFunction2}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{ImperativeAggregate, AggregateFunction}
 import org.apache.spark.sql.expressions.{MutableAggregationBuffer, UserDefinedAggregateFunction}
 import org.apache.spark.sql.types._
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index eaafd83158a1..79abf2d5929b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -28,8 +28,8 @@ object Utils {
 
   def planAggregateWithoutPartial(
       groupingExpressions: Seq[NamedExpression],
-      aggregateExpressions: Seq[AggregateExpression2],
-      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
+      aggregateExpressions: Seq[AggregateExpression],
+      aggregateFunctionToAttribute: Map[(AggregateFunction, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
 
@@ -54,8 +54,8 @@ object Utils {
 
   def planAggregateWithoutDistinct(
       groupingExpressions: Seq[NamedExpression],
-      aggregateExpressions: Seq[AggregateExpression2],
-      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
+      aggregateExpressions: Seq[AggregateExpression],
+      aggregateFunctionToAttribute: Map[(AggregateFunction, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
     // Check if we can use TungstenAggregate.
@@ -137,9 +137,9 @@ object Utils {
 
   def planAggregateWithOneDistinct(
       groupingExpressions: Seq[NamedExpression],
-      functionsWithDistinct: Seq[AggregateExpression2],
-      functionsWithoutDistinct: Seq[AggregateExpression2],
-      aggregateFunctionToAttribute: Map[(AggregateFunction2, Boolean), Attribute],
+      functionsWithDistinct: Seq[AggregateExpression],
+      functionsWithoutDistinct: Seq[AggregateExpression],
+      aggregateFunctionToAttribute: Map[(AggregateFunction, Boolean), Attribute],
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
 
@@ -253,16 +253,16 @@ object Utils {
         // Children of an AggregateFunction with DISTINCT keyword has already
         // been evaluated. At here, we need to replace original children
         // to AttributeReferences.
-        case agg @ AggregateExpression2(aggregateFunction, mode, true) =>
+        case agg @ AggregateExpression(aggregateFunction, mode, true) =>
           val rewrittenAggregateFunction = aggregateFunction.transformDown {
             case expr if expr == distinctColumnExpression => distinctColumnAttribute
-          }.asInstanceOf[AggregateFunction2]
+          }.asInstanceOf[AggregateFunction]
           // We rewrite the aggregate function to a non-distinct aggregation because
           // its input will have distinct arguments.
           // We just keep the isDistinct setting to true, so when users look at the query plan,
           // they still can see distinct aggregations.
           val rewrittenAggregateExpression =
-            AggregateExpression2(rewrittenAggregateFunction, Complete, isDistinct = true)
+            AggregateExpression(rewrittenAggregateFunction, Complete, isDistinct = true)
 
           val aggregateFunctionAttribute = aggregateFunctionToAttribute(agg.aggregateFunction, true)
           (rewrittenAggregateExpression, aggregateFunctionAttribute)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 0b3192a6da9d..8cc25c244063 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.expressions
 
 import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
-import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, AggregateExpression2}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression, Complete}
 import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
 
@@ -70,7 +70,7 @@ abstract class Aggregator[-A, B, C] {
       implicit bEncoder: Encoder[B],
       cEncoder: Encoder[C]): TypedColumn[A, C] = {
     val expr =
-      new AggregateExpression2(
+      new AggregateExpression(
         TypedAggregateExpression(this),
         Complete,
         false)
@@ -78,4 +78,3 @@ abstract class Aggregator[-A, B, C] {
     new TypedColumn[A, C](expr, encoderFor[C])
   }
 }
-
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
index 8b9247adea20..fc873c04f88f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/WindowSpec.scala
@@ -18,9 +18,9 @@
 package org.apache.spark.sql.expressions
 
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.sql.types.BooleanType
 import org.apache.spark.sql.{Column, catalyst}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 
 
 /**
@@ -141,40 +141,56 @@ class WindowSpec private[sql](
    */
   private[sql] def withAggregate(aggregate: Column): Column = {
     val windowExpr = aggregate.expr match {
-      case Average(child) => WindowExpression(
-        UnresolvedWindowFunction("avg", child :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Sum(child) => WindowExpression(
-        UnresolvedWindowFunction("sum", child :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Count(child) => WindowExpression(
-        UnresolvedWindowFunction("count", child :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case First(child, ignoreNulls) => WindowExpression(
-        // TODO this is a hack for Hive UDAF first_value
-        UnresolvedWindowFunction(
-          "first_value",
-          child :: ignoreNulls :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Last(child, ignoreNulls) => WindowExpression(
-        // TODO this is a hack for Hive UDAF last_value
-        UnresolvedWindowFunction(
-          "last_value",
-          child :: ignoreNulls :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Min(child) => WindowExpression(
-        UnresolvedWindowFunction("min", child :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case Max(child) => WindowExpression(
-        UnresolvedWindowFunction("max", child :: Nil),
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
-      case wf: WindowFunction => WindowExpression(
-        wf,
-        WindowSpecDefinition(partitionSpec, orderSpec, frame))
+      // First, we check if we get an aggregate function without the DISTINCT keyword.
+      // Right now, we do not support using a DISTINCT aggregate function as a
+      // window function.
+      case AggregateExpression(aggregateFunction, _, isDistinct) if !isDistinct =>
+        aggregateFunction match {
+          case Average(child) => WindowExpression(
+            UnresolvedWindowFunction("avg", child :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case Sum(child) => WindowExpression(
+            UnresolvedWindowFunction("sum", child :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case Count(child) => WindowExpression(
+            UnresolvedWindowFunction("count", child :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case First(child, ignoreNulls) => WindowExpression(
+            // TODO this is a hack for Hive UDAF first_value
+            UnresolvedWindowFunction(
+              "first_value",
+              child :: ignoreNulls :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case Last(child, ignoreNulls) => WindowExpression(
+            // TODO this is a hack for Hive UDAF last_value
+            UnresolvedWindowFunction(
+              "last_value",
+              child :: ignoreNulls :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case Min(child) => WindowExpression(
+            UnresolvedWindowFunction("min", child :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case Max(child) => WindowExpression(
+            UnresolvedWindowFunction("max", child :: Nil),
+            WindowSpecDefinition(partitionSpec, orderSpec, frame))
+          case x =>
+            throw new UnsupportedOperationException(s"$x is not supported in a window operation.")
+        }
+
+      case AggregateExpression(aggregateFunction, _, isDistinct) if isDistinct =>
+        throw new UnsupportedOperationException(
+          s"Distinct aggregate function ${aggregateFunction} is not supported " +
+            s"in window operation.")
+
+      case wf: WindowFunction =>
+        WindowExpression(
+          wf,
+          WindowSpecDefinition(partitionSpec, orderSpec, frame))
+
       case x =>
-        throw new UnsupportedOperationException(s"$x is not supported in window operation.")
+        throw new UnsupportedOperationException(s"$x is not supported in a window operation.")
     }
+
     new Column(windowExpr)
   }
-
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala
index 258afadc7695..11dbf391cff9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.expressions
 
-import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, AggregateExpression2}
+import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, AggregateExpression}
 import org.apache.spark.sql.execution.aggregate.ScalaUDAF
 import org.apache.spark.sql.{Column, Row}
 import org.apache.spark.sql.types._
@@ -109,7 +109,7 @@ abstract class UserDefinedAggregateFunction extends Serializable {
   @scala.annotation.varargs
   def apply(exprs: Column*): Column = {
     val aggregateExpression =
-      AggregateExpression2(
+      AggregateExpression(
         ScalaUDAF(exprs.map(_.expr), this),
         Complete,
         isDistinct = false)
@@ -123,7 +123,7 @@ abstract class UserDefinedAggregateFunction extends Serializable {
   @scala.annotation.varargs
   def distinct(exprs: Column*): Column = {
     val aggregateExpression =
-      AggregateExpression2(
+      AggregateExpression(
         ScalaUDAF(exprs.map(_.expr), this),
         Complete,
         isDistinct = true)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 6d56542ee087..22104e4d4861 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -28,6 +28,7 @@ import org.apache.spark.sql.catalyst.{SqlParser, ScalaReflection}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, Star}
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, Encoder}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.BroadcastHint
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
@@ -76,6 +77,12 @@ object functions extends LegacyFunctions {
 
   private def withExpr(expr: Expression): Column = Column(expr)
 
+  private def withAggregateFunction(
+    func: AggregateFunction,
+    isDistinct: Boolean = false): Column = {
+    Column(func.toAggregateExpression(isDistinct))
+  }
+
   private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
 
 
@@ -154,7 +161,9 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def approxCountDistinct(e: Column): Column = withExpr { ApproxCountDistinct(e.expr) }
+  def approxCountDistinct(e: Column): Column = withAggregateFunction {
+    HyperLogLogPlusPlus(e.expr)
+  }
 
   /**
    * Aggregate function: returns the approximate number of distinct items in a group.
@@ -170,8 +179,8 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def approxCountDistinct(e: Column, rsd: Double): Column = withExpr {
-    ApproxCountDistinct(e.expr, rsd)
+  def approxCountDistinct(e: Column, rsd: Double): Column = withAggregateFunction {
+    HyperLogLogPlusPlus(e.expr, rsd, 0, 0)
   }
 
   /**
@@ -190,7 +199,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def avg(e: Column): Column = withExpr { Average(e.expr) }
+  def avg(e: Column): Column = withAggregateFunction { Average(e.expr) }
 
   /**
    * Aggregate function: returns the average of the values in a group.
@@ -226,7 +235,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def corr(column1: Column, column2: Column): Column = withExpr {
+  def corr(column1: Column, column2: Column): Column = withAggregateFunction {
     Corr(column1.expr, column2.expr)
   }
 
@@ -246,7 +255,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def count(e: Column): Column = withExpr {
+  def count(e: Column): Column = withAggregateFunction {
     e.expr match {
       // Turn count(*) into count(1)
       case s: Star => Count(Literal(1))
@@ -269,8 +278,8 @@ object functions extends LegacyFunctions {
    * @since 1.3.0
    */
   @scala.annotation.varargs
-  def countDistinct(expr: Column, exprs: Column*): Column = withExpr {
-    CountDistinct((expr +: exprs).map(_.expr))
+  def countDistinct(expr: Column, exprs: Column*): Column = {
+    withAggregateFunction(Count.apply((expr +: exprs).map(_.expr)), isDistinct = true)
   }
 
   /**
@@ -289,7 +298,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def first(e: Column): Column = withExpr { First(e.expr) }
+  def first(e: Column): Column = withAggregateFunction { new First(e.expr) }
 
   /**
    * Aggregate function: returns the first value of a column in a group.
@@ -305,7 +314,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def kurtosis(e: Column): Column = withExpr { Kurtosis(e.expr) }
+  def kurtosis(e: Column): Column = withAggregateFunction { Kurtosis(e.expr) }
 
   /**
    * Aggregate function: returns the last value in a group.
@@ -313,7 +322,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def last(e: Column): Column = withExpr { Last(e.expr) }
+  def last(e: Column): Column = withAggregateFunction { new Last(e.expr) }
 
   /**
    * Aggregate function: returns the last value of the column in a group.
@@ -329,7 +338,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def max(e: Column): Column = withExpr { Max(e.expr) }
+  def max(e: Column): Column = withAggregateFunction { Max(e.expr) }
 
   /**
    * Aggregate function: returns the maximum value of the column in a group.
@@ -363,7 +372,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def min(e: Column): Column = withExpr { Min(e.expr) }
+  def min(e: Column): Column = withAggregateFunction { Min(e.expr) }
 
   /**
    * Aggregate function: returns the minimum value of the column in a group.
@@ -379,7 +388,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def skewness(e: Column): Column = withExpr { Skewness(e.expr) }
+  def skewness(e: Column): Column = withAggregateFunction { Skewness(e.expr) }
 
   /**
    * Aggregate function: alias for [[stddev_samp]].
@@ -387,7 +396,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev(e: Column): Column = withExpr { StddevSamp(e.expr) }
+  def stddev(e: Column): Column = withAggregateFunction { StddevSamp(e.expr) }
 
   /**
    * Aggregate function: returns the unbiased sample standard deviation of
@@ -396,7 +405,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev_samp(e: Column): Column = withExpr { StddevSamp(e.expr) }
+  def stddev_samp(e: Column): Column = withAggregateFunction { StddevSamp(e.expr) }
 
   /**
    * Aggregate function: returns the population standard deviation of
@@ -405,7 +414,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def stddev_pop(e: Column): Column = withExpr { StddevPop(e.expr) }
+  def stddev_pop(e: Column): Column = withAggregateFunction { StddevPop(e.expr) }
 
   /**
    * Aggregate function: returns the sum of all values in the expression.
@@ -413,7 +422,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def sum(e: Column): Column = withExpr { Sum(e.expr) }
+  def sum(e: Column): Column = withAggregateFunction { Sum(e.expr) }
 
   /**
    * Aggregate function: returns the sum of all values in the given column.
@@ -429,7 +438,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def sumDistinct(e: Column): Column = withExpr { SumDistinct(e.expr) }
+  def sumDistinct(e: Column): Column = withAggregateFunction(Sum(e.expr), isDistinct = true)
 
   /**
    * Aggregate function: returns the sum of distinct values in the expression.
@@ -445,7 +454,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def variance(e: Column): Column = withExpr { VarianceSamp(e.expr) }
+  def variance(e: Column): Column = withAggregateFunction { VarianceSamp(e.expr) }
 
   /**
    * Aggregate function: returns the unbiased variance of the values in a group.
@@ -453,7 +462,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def var_samp(e: Column): Column = withExpr { VarianceSamp(e.expr) }
+  def var_samp(e: Column): Column = withAggregateFunction { VarianceSamp(e.expr) }
 
   /**
    * Aggregate function: returns the population variance of the values in a group.
@@ -461,7 +470,7 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.6.0
    */
-  def var_pop(e: Column): Column = withExpr { VariancePop(e.expr) }
+  def var_pop(e: Column): Column = withAggregateFunction { VariancePop(e.expr) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Window functions
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 3de277a79a52..441a0c6d0e36 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -237,34 +237,10 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   }
 
   test("SPARK-8828 sum should return null if all input values are null") {
-    withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "true") {
-      withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-        checkAnswer(
-          sql("select sum(a), avg(a) from allNulls"),
-          Seq(Row(null, null))
-        )
-      }
-      withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "false") {
-        checkAnswer(
-          sql("select sum(a), avg(a) from allNulls"),
-          Seq(Row(null, null))
-        )
-      }
-    }
-    withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "false") {
-      withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-        checkAnswer(
-          sql("select sum(a), avg(a) from allNulls"),
-          Seq(Row(null, null))
-        )
-      }
-      withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "false") {
-        checkAnswer(
-          sql("select sum(a), avg(a) from allNulls"),
-          Seq(Row(null, null))
-        )
-      }
-    }
+    checkAnswer(
+      sql("select sum(a), avg(a) from allNulls"),
+      Seq(Row(null, null))
+    )
   }
 
   private def testCodeGen(sqlText: String, expectedResults: Seq[Row]): Unit = {
@@ -507,29 +483,22 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   }
 
   test("literal in agg grouping expressions") {
-    def literalInAggTest(): Unit = {
-      checkAnswer(
-        sql("SELECT a, count(1) FROM testData2 GROUP BY a, 1"),
-        Seq(Row(1, 2), Row(2, 2), Row(3, 2)))
-      checkAnswer(
-        sql("SELECT a, count(2) FROM testData2 GROUP BY a, 2"),
-        Seq(Row(1, 2), Row(2, 2), Row(3, 2)))
-
-      checkAnswer(
-        sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a, 1"),
-        sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a"))
-      checkAnswer(
-        sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a, 1 + 2"),
-        sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a"))
-      checkAnswer(
-        sql("SELECT 1, 2, sum(b) FROM testData2 GROUP BY 1, 2"),
-        sql("SELECT 1, 2, sum(b) FROM testData2"))
-    }
+    checkAnswer(
+      sql("SELECT a, count(1) FROM testData2 GROUP BY a, 1"),
+      Seq(Row(1, 2), Row(2, 2), Row(3, 2)))
+    checkAnswer(
+      sql("SELECT a, count(2) FROM testData2 GROUP BY a, 2"),
+      Seq(Row(1, 2), Row(2, 2), Row(3, 2)))
 
-    literalInAggTest()
-    withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "false") {
-      literalInAggTest()
-    }
+    checkAnswer(
+      sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a, 1"),
+      sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a"))
+    checkAnswer(
+      sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a, 1 + 2"),
+      sql("SELECT a, 1, sum(b) FROM testData2 GROUP BY a"))
+    checkAnswer(
+      sql("SELECT 1, 2, sum(b) FROM testData2 GROUP BY 1, 2"),
+      sql("SELECT 1, 2, sum(b) FROM testData2"))
   }
 
   test("aggregates with nulls") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
index a229e5814df8..e31c528f3a63 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
@@ -21,16 +21,13 @@ import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
 
 import scala.beans.{BeanInfo, BeanProperty}
 
-import com.clearspring.analytics.stream.cardinality.HyperLogLog
-
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.{OpenHashSetUDT, HyperLogLogUDT}
+import org.apache.spark.sql.catalyst.expressions.OpenHashSetUDT
 import org.apache.spark.sql.execution.datasources.parquet.ParquetTest
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
-import org.apache.spark.util.Utils
 import org.apache.spark.util.collection.OpenHashSet
 
 
@@ -134,16 +131,6 @@ class UserDefinedTypeSuite extends QueryTest with SharedSQLContext with ParquetT
     df.orderBy('int).limit(1).groupBy('int).agg(first('vec)).collect()(0).getAs[MyDenseVector](0)
   }
 
-  test("HyperLogLogUDT") {
-    val hyperLogLogUDT = HyperLogLogUDT
-    val hyperLogLog = new HyperLogLog(0.4)
-    (1 to 10).foreach(i => hyperLogLog.offer(Row(i)))
-
-    val actual = hyperLogLogUDT.deserialize(hyperLogLogUDT.serialize(hyperLogLog))
-    assert(actual.cardinality() === hyperLogLog.cardinality())
-    assert(java.util.Arrays.equals(actual.getBytes, hyperLogLog.getBytes))
-  }
-
   test("OpenHashSetUDT") {
     val openHashSetUDT = new OpenHashSetUDT(IntegerType)
     val set = new OpenHashSet[Int]
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index 2076c573b56c..44634dacbde6 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -38,7 +38,7 @@ class PlannerSuite extends SharedSQLContext {
   private def testPartialAggregationPlan(query: LogicalPlan): Unit = {
     val planner = sqlContext.planner
     import planner._
-    val plannedOption = HashAggregation(query).headOption.orElse(Aggregation(query).headOption)
+    val plannedOption = Aggregation(query).headOption
     val planned =
       plannedOption.getOrElse(
         fail(s"Could query play aggregation query $query. Is it an aggregation query?"))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index cdd885ba1420..4b4f5c6c45c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -152,36 +152,6 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
     )
   }
 
-  test("Aggregate metrics") {
-    withSQLConf(
-      SQLConf.UNSAFE_ENABLED.key -> "false",
-      SQLConf.CODEGEN_ENABLED.key -> "false",
-      SQLConf.TUNGSTEN_ENABLED.key -> "false") {
-      // Assume the execution plan is
-      // ... -> Aggregate(nodeId = 2) -> TungstenExchange(nodeId = 1) -> Aggregate(nodeId = 0)
-      val df = testData2.groupBy().count() // 2 partitions
-      testSparkPlanMetrics(df, 1, Map(
-        2L -> ("Aggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 2L)),
-        0L -> ("Aggregate", Map(
-          "number of input rows" -> 2L,
-          "number of output rows" -> 1L)))
-      )
-
-      // 2 partitions and each partition contains 2 keys
-      val df2 = testData2.groupBy('a).count()
-      testSparkPlanMetrics(df2, 1, Map(
-        2L -> ("Aggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 4L)),
-        0L -> ("Aggregate", Map(
-          "number of input rows" -> 4L,
-          "number of output rows" -> 3L)))
-      )
-    }
-  }
-
   test("SortBasedAggregate metrics") {
     // Because SortBasedAggregate may skip different rows if the number of partitions is different,
     // this test should use the deterministic number of partitions.
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c5f69657f529..ba6204633b9c 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -584,7 +584,6 @@ class HiveContext private[hive](
       HiveTableScans,
       DataSinks,
       Scripts,
-      HashAggregation,
       Aggregation,
       LeftSemiJoin,
       EquiJoinSelection,
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index ab88c1e68fd7..6f8ed413a06c 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -38,6 +38,7 @@ import org.apache.spark.Logging
 import org.apache.spark.sql.{AnalysisException, catalyst}
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.{logical, _}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.trees.CurrentOrigin
@@ -1508,9 +1509,10 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       UnresolvedStar(Some(UnresolvedAttribute.parseAttributeName(name)))
 
     /* Aggregate Functions */
-    case Token("TOK_FUNCTIONSTAR", Token(COUNT(), Nil) :: Nil) => Count(Literal(1))
-    case Token("TOK_FUNCTIONDI", Token(COUNT(), Nil) :: args) => CountDistinct(args.map(nodeToExpr))
-    case Token("TOK_FUNCTIONDI", Token(SUM(), Nil) :: arg :: Nil) => SumDistinct(nodeToExpr(arg))
+    case Token("TOK_FUNCTIONDI", Token(COUNT(), Nil) :: args) =>
+      Count(args.map(nodeToExpr)).toAggregateExpression(isDistinct = true)
+    case Token("TOK_FUNCTIONSTAR", Token(COUNT(), Nil) :: Nil) =>
+      Count(Literal(1)).toAggregateExpression()
 
     /* Casts */
     case Token("TOK_FUNCTION", Token("TOK_STRING", Nil) :: arg :: Nil) =>
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index ea36c132bb19..6bf2c53440ba 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -69,11 +69,7 @@ class ScalaAggregateFunction(schema: StructType) extends UserDefinedAggregateFun
 abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   import testImplicits._
 
-  var originalUseAggregate2: Boolean = _
-
   override def beforeAll(): Unit = {
-    originalUseAggregate2 = sqlContext.conf.useSqlAggregate2
-    sqlContext.setConf(SQLConf.USE_SQL_AGGREGATE2.key, "true")
     val data1 = Seq[(Integer, Integer)](
       (1, 10),
       (null, -60),
@@ -120,7 +116,6 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
     sqlContext.sql("DROP TABLE IF EXISTS agg1")
     sqlContext.sql("DROP TABLE IF EXISTS agg2")
     sqlContext.dropTempTable("emptyTable")
-    sqlContext.setConf(SQLConf.USE_SQL_AGGREGATE2.key, originalUseAggregate2.toString)
   }
 
   test("empty table") {
@@ -447,73 +442,80 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
   }
 
   test("single distinct column set") {
-    // DISTINCT is not meaningful with Max and Min, so we just ignore the DISTINCT keyword.
-    checkAnswer(
-      sqlContext.sql(
-        """
-          |SELECT
-          |  min(distinct value1),
-          |  sum(distinct value1),
-          |  avg(value1),
-          |  avg(value2),
-          |  max(distinct value1)
-          |FROM agg2
-        """.stripMargin),
-      Row(-60, 70.0, 101.0/9.0, 5.6, 100))
-
-    checkAnswer(
-      sqlContext.sql(
-        """
-          |SELECT
-          |  mydoubleavg(distinct value1),
-          |  avg(value1),
-          |  avg(value2),
-          |  key,
-          |  mydoubleavg(value1 - 1),
-          |  mydoubleavg(distinct value1) * 0.1,
-          |  avg(value1 + value2)
-          |FROM agg2
-          |GROUP BY key
-        """.stripMargin),
-      Row(120.0, 70.0/3.0, -10.0/3.0, 1, 67.0/3.0 + 100.0, 12.0, 20.0) ::
-        Row(100.0, 1.0/3.0, 1.0, 2, -2.0/3.0 + 100.0, 10.0, 2.0) ::
-        Row(null, null, 3.0, 3, null, null, null) ::
-        Row(110.0, 10.0, 20.0, null, 109.0, 11.0, 30.0) :: Nil)
-
-    checkAnswer(
-      sqlContext.sql(
-        """
-          |SELECT
-          |  key,
-          |  mydoubleavg(distinct value1),
-          |  mydoublesum(value2),
-          |  mydoublesum(distinct value1),
-          |  mydoubleavg(distinct value1),
-          |  mydoubleavg(value1)
-          |FROM agg2
-          |GROUP BY key
-        """.stripMargin),
-      Row(1, 120.0, -10.0, 40.0, 120.0, 70.0/3.0 + 100.0) ::
-        Row(2, 100.0, 3.0, 0.0, 100.0, 1.0/3.0 + 100.0) ::
-        Row(3, null, 3.0, null, null, null) ::
-        Row(null, 110.0, 60.0, 30.0, 110.0, 110.0) :: Nil)
-
-    checkAnswer(
-      sqlContext.sql(
-        """
-          |SELECT
-          |  count(value1),
-          |  count(*),
-          |  count(1),
-          |  count(DISTINCT value1),
-          |  key
-          |FROM agg2
-          |GROUP BY key
-        """.stripMargin),
-      Row(3, 3, 3, 2, 1) ::
-        Row(3, 4, 4, 2, 2) ::
-        Row(0, 2, 2, 0, 3) ::
-        Row(3, 4, 4, 3, null) :: Nil)
+    Seq(true, false).foreach { specializeSingleDistinctAgg =>
+      val conf =
+        (SQLConf.SPECIALIZE_SINGLE_DISTINCT_AGG_PLANNING.key,
+          specializeSingleDistinctAgg.toString)
+      withSQLConf(conf) {
+        // DISTINCT is not meaningful with Max and Min, so we just ignore the DISTINCT keyword.
+        checkAnswer(
+          sqlContext.sql(
+            """
+              |SELECT
+              |  min(distinct value1),
+              |  sum(distinct value1),
+              |  avg(value1),
+              |  avg(value2),
+              |  max(distinct value1)
+              |FROM agg2
+            """.stripMargin),
+          Row(-60, 70.0, 101.0/9.0, 5.6, 100))
+
+        checkAnswer(
+          sqlContext.sql(
+            """
+              |SELECT
+              |  mydoubleavg(distinct value1),
+              |  avg(value1),
+              |  avg(value2),
+              |  key,
+              |  mydoubleavg(value1 - 1),
+              |  mydoubleavg(distinct value1) * 0.1,
+              |  avg(value1 + value2)
+              |FROM agg2
+              |GROUP BY key
+            """.stripMargin),
+          Row(120.0, 70.0/3.0, -10.0/3.0, 1, 67.0/3.0 + 100.0, 12.0, 20.0) ::
+            Row(100.0, 1.0/3.0, 1.0, 2, -2.0/3.0 + 100.0, 10.0, 2.0) ::
+            Row(null, null, 3.0, 3, null, null, null) ::
+            Row(110.0, 10.0, 20.0, null, 109.0, 11.0, 30.0) :: Nil)
+
+        checkAnswer(
+          sqlContext.sql(
+            """
+              |SELECT
+              |  key,
+              |  mydoubleavg(distinct value1),
+              |  mydoublesum(value2),
+              |  mydoublesum(distinct value1),
+              |  mydoubleavg(distinct value1),
+              |  mydoubleavg(value1)
+              |FROM agg2
+              |GROUP BY key
+            """.stripMargin),
+          Row(1, 120.0, -10.0, 40.0, 120.0, 70.0/3.0 + 100.0) ::
+            Row(2, 100.0, 3.0, 0.0, 100.0, 1.0/3.0 + 100.0) ::
+            Row(3, null, 3.0, null, null, null) ::
+            Row(null, 110.0, 60.0, 30.0, 110.0, 110.0) :: Nil)
+
+        checkAnswer(
+          sqlContext.sql(
+            """
+              |SELECT
+              |  count(value1),
+              |  count(*),
+              |  count(1),
+              |  count(DISTINCT value1),
+              |  key
+              |FROM agg2
+              |GROUP BY key
+            """.stripMargin),
+          Row(3, 3, 3, 2, 1) ::
+            Row(3, 4, 4, 2, 2) ::
+            Row(0, 2, 2, 0, 3) ::
+            Row(3, 4, 4, 3, null) :: Nil)
+      }
+    }
   }
 
   test("single distinct multiple columns set") {
@@ -699,48 +701,6 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
 
     val corr7 = sqlContext.sql("SELECT corr(b, c) FROM covar_tab").collect()(0).getDouble(0)
     assert(math.abs(corr7 - 0.6633880657639323) < 1e-12)
-
-    withSQLConf(SQLConf.USE_SQL_AGGREGATE2.key -> "false") {
-      val errorMessage = intercept[SparkException] {
-        val df = Seq.tabulate(10)(i => (1.0 * i, 2.0 * i, i * -1.0)).toDF("a", "b", "c")
-        val corr1 = df.repartition(2).groupBy().agg(corr("a", "b")).collect()(0).getDouble(0)
-      }.getMessage
-      assert(errorMessage.contains("java.lang.UnsupportedOperationException: " +
-        "Corr only supports the new AggregateExpression2"))
-    }
-  }
-
-  test("test Last implemented based on AggregateExpression1") {
-    // TODO: Remove this test once we remove AggregateExpression1.
-    import org.apache.spark.sql.functions._
-    val df = Seq((1, 1), (2, 2), (3, 3)).toDF("i", "j").repartition(1)
-    withSQLConf(
-      SQLConf.SHUFFLE_PARTITIONS.key -> "1",
-      SQLConf.USE_SQL_AGGREGATE2.key -> "false") {
-
-      checkAnswer(
-        df.groupBy("i").agg(last("j")),
-        df
-      )
-    }
-  }
-
-  test("error handling") {
-    withSQLConf("spark.sql.useAggregate2" -> "false") {
-      val errorMessage = intercept[AnalysisException] {
-        sqlContext.sql(
-          """
-            |SELECT
-            |  key,
-            |  sum(value + 1.5 * key),
-            |  mydoublesum(value),
-            |  mydoubleavg(value)
-            |FROM agg1
-            |GROUP BY key
-          """.stripMargin).collect()
-      }.getMessage
-      assert(errorMessage.contains("implemented based on the new Aggregate Function interface"))
-    }
   }
 
   test("no aggregation function (SPARK-11486)") {

From 47735cdc2a878cfdbe76316d3ff8314a45dabf54 Mon Sep 17 00:00:00 2001
From: "Oscar D. Lara Yejas" <olarayej@mail.usf.edu>
Date: Tue, 10 Nov 2015 11:07:57 -0800
Subject: [PATCH 597/896] [SPARK-10863][SPARKR] Method coltypes() (New version)

This is a follow up on PR #8984, as the corresponding branch for such PR was damaged.

Author: Oscar D. Lara Yejas <olarayej@mail.usf.edu>

Closes #9579 from olarayej/SPARK-10863_NEW14.
---
 R/pkg/DESCRIPTION                |  1 +
 R/pkg/NAMESPACE                  |  6 ++--
 R/pkg/R/DataFrame.R              | 49 ++++++++++++++++++++++++++++++++
 R/pkg/R/generics.R               |  4 +++
 R/pkg/R/schema.R                 | 15 +---------
 R/pkg/R/types.R                  | 43 ++++++++++++++++++++++++++++
 R/pkg/inst/tests/test_sparkSQL.R | 24 +++++++++++++++-
 7 files changed, 124 insertions(+), 18 deletions(-)
 create mode 100644 R/pkg/R/types.R

diff --git a/R/pkg/DESCRIPTION b/R/pkg/DESCRIPTION
index 3d6edb70ec98..369714f7b99c 100644
--- a/R/pkg/DESCRIPTION
+++ b/R/pkg/DESCRIPTION
@@ -34,4 +34,5 @@ Collate:
     'serialize.R'
     'sparkR.R'
     'stats.R'
+    'types.R'
     'utils.R'
diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 56b8ed0bf271..52fd6c9f76c5 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -23,9 +23,11 @@ export("setJobGroup",
 exportClasses("DataFrame")
 
 exportMethods("arrange",
+              "as.data.frame",
               "attach",
               "cache",
               "collect",
+              "coltypes",
               "columns",
               "count",
               "cov",
@@ -262,6 +264,4 @@ export("structField",
        "structType",
        "structType.jobj",
        "structType.structField",
-       "print.structType")
-
-export("as.data.frame")
+       "print.structType")
\ No newline at end of file
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index e9013aa34a84..cc868069d1e5 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -2152,3 +2152,52 @@ setMethod("with",
             newEnv <- assignNewEnv(data)
             eval(substitute(expr), envir = newEnv, enclos = newEnv)
           })
+
+#' Returns the column types of a DataFrame.
+#' 
+#' @name coltypes
+#' @title Get column types of a DataFrame
+#' @family dataframe_funcs
+#' @param x (DataFrame)
+#' @return value (character) A character vector with the column types of the given DataFrame
+#' @rdname coltypes
+#' @examples \dontrun{
+#' irisDF <- createDataFrame(sqlContext, iris)
+#' coltypes(irisDF)
+#' }
+setMethod("coltypes",
+          signature(x = "DataFrame"),
+          function(x) {
+            # Get the data types of the DataFrame by invoking dtypes() function
+            types <- sapply(dtypes(x), function(x) {x[[2]]})
+
+            # Map Spark data types into R's data types using DATA_TYPES environment
+            rTypes <- sapply(types, USE.NAMES=F, FUN=function(x) {
+
+              # Check for primitive types
+              type <- PRIMITIVE_TYPES[[x]]
+
+              if (is.null(type)) {
+                # Check for complex types
+                for (t in names(COMPLEX_TYPES)) {
+                  if (substring(x, 1, nchar(t)) == t) {
+                    type <- COMPLEX_TYPES[[t]]
+                    break
+                  }
+                }
+
+                if (is.null(type)) {
+                  stop(paste("Unsupported data type: ", x))
+                }
+              }
+              type
+            })
+
+            # Find which types don't have mapping to R
+            naIndices <- which(is.na(rTypes))
+
+            # Assign the original scala data types to the unmatched ones
+            rTypes[naIndices] <- types[naIndices]
+
+            rTypes
+          })
\ No newline at end of file
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index efef7d66b522..89731affeb89 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -1047,3 +1047,7 @@ setGeneric("attach")
 #' @rdname with
 #' @export
 setGeneric("with")
+
+#' @rdname coltypes
+#' @export
+setGeneric("coltypes", function(x) { standardGeneric("coltypes") })
\ No newline at end of file
diff --git a/R/pkg/R/schema.R b/R/pkg/R/schema.R
index 6f0e9a94e9bf..c6ddb562270b 100644
--- a/R/pkg/R/schema.R
+++ b/R/pkg/R/schema.R
@@ -115,20 +115,7 @@ structField.jobj <- function(x) {
 }
 
 checkType <- function(type) {
-  primtiveTypes <- c("byte",
-                     "integer",
-                     "float",
-                     "double",
-                     "numeric",
-                     "character",
-                     "string",
-                     "binary",
-                     "raw",
-                     "logical",
-                     "boolean",
-                     "timestamp",
-                     "date")
-  if (type %in% primtiveTypes) {
+  if (!is.null(PRIMITIVE_TYPES[[type]])) {
     return()
   } else {
     # Check complex types
diff --git a/R/pkg/R/types.R b/R/pkg/R/types.R
new file mode 100644
index 000000000000..1828c23ab0f6
--- /dev/null
+++ b/R/pkg/R/types.R
@@ -0,0 +1,43 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# types.R. This file handles the data type mapping between Spark and R
+
+# The primitive data types, where names(PRIMITIVE_TYPES) are Scala types whereas
+# values are equivalent R types. This is stored in an environment to allow for
+# more efficient look up (environments use hashmaps).
+PRIMITIVE_TYPES <- as.environment(list(
+  "byte"="integer",
+  "tinyint"="integer",
+  "smallint"="integer",
+  "integer"="integer",
+  "bigint"="numeric",
+  "float"="numeric",
+  "double"="numeric",
+  "decimal"="numeric",
+  "string"="character",
+  "binary"="raw",
+  "boolean"="logical",
+  "timestamp"="POSIXct",
+  "date"="Date"))
+
+# The complex data types. These do not have any direct mapping to R's types.
+COMPLEX_TYPES <- list(
+  "map"=NA,
+  "array"=NA,
+  "struct"=NA)
+
+# The full list of data types.
+DATA_TYPES <- as.environment(c(as.list(PRIMITIVE_TYPES), COMPLEX_TYPES))
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index fbdb9a8f1ef6..06f52d021cff 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1467,8 +1467,9 @@ test_that("SQL error message is returned from JVM", {
   expect_equal(grepl("Table not found: blah", retError), TRUE)
 })
 
+irisDF <- createDataFrame(sqlContext, iris)
+
 test_that("Method as.data.frame as a synonym for collect()", {
-  irisDF <- createDataFrame(sqlContext, iris)
   expect_equal(as.data.frame(irisDF), collect(irisDF))
   irisDF2 <- irisDF[irisDF$Species == "setosa", ]
   expect_equal(as.data.frame(irisDF2), collect(irisDF2))
@@ -1503,6 +1504,27 @@ test_that("with() on a DataFrame", {
   expect_equal(nrow(sum2), 35)
 })
 
+test_that("Method coltypes() to get R's data types of a DataFrame", {
+  expect_equal(coltypes(irisDF), c(rep("numeric", 4), "character"))
+
+  data <- data.frame(c1=c(1,2,3),
+                     c2=c(T,F,T),
+                     c3=c("2015/01/01 10:00:00", "2015/01/02 10:00:00", "2015/01/03 10:00:00"))
+
+  schema <- structType(structField("c1", "byte"),
+                       structField("c3", "boolean"),
+                       structField("c4", "timestamp"))
+
+  # Test primitive types
+  DF <- createDataFrame(sqlContext, data, schema)
+  expect_equal(coltypes(DF), c("integer", "logical", "POSIXct"))
+
+  # Test complex types
+  x <- createDataFrame(sqlContext, list(list(as.environment(
+    list("a"="b", "c"="d", "e"="f")))))
+  expect_equal(coltypes(x), "map<string,string>")
+})
+
 unlink(parquetPath)
 unlink(jsonPath)
 unlink(jsonPathNa)

From dfcfcbcc0448ebc6f02eba6bf0495832a321c87e Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 10 Nov 2015 11:14:25 -0800
Subject: [PATCH 598/896] [SPARK-11578][SQL][FOLLOW-UP] complete the user
 facing api for typed aggregation

Currently the user facing api for typed aggregation has some limitations:

* the customized typed aggregation must be the first of aggregation list
* the customized typed aggregation can only use long as buffer type
* the customized typed aggregation can only use flat type as result type

This PR tries to remove these limitations.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9599 from cloud-fan/agg.
---
 .../catalyst/encoders/ExpressionEncoder.scala |  6 +++
 .../aggregate/TypedAggregateExpression.scala  | 50 +++++++++++++-----
 .../spark/sql/expressions/Aggregator.scala    |  5 ++
 .../spark/sql/DatasetAggregatorSuite.scala    | 52 +++++++++++++++++++
 4 files changed, 99 insertions(+), 14 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index c287aebeeee0..005c0627f56b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -185,6 +185,12 @@ case class ExpressionEncoder[T](
     })
   }
 
+  def shift(delta: Int): ExpressionEncoder[T] = {
+    copy(constructExpression = constructExpression transform {
+      case r: BoundReference => r.copy(ordinal = r.ordinal + delta)
+    })
+  }
+
   /**
    * Returns a copy of this encoder where the expressions used to create an object given an
    * input row have been modified to pull the object out from a nested struct, instead of the
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index 24d8122b6222..0e5bc1f9abf2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -20,13 +20,13 @@ package org.apache.spark.sql.execution.aggregate
 import scala.language.existentials
 
 import org.apache.spark.Logging
+import org.apache.spark.sql.expressions.Aggregator
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
 import org.apache.spark.sql.catalyst.expressions.aggregate.ImperativeAggregate
-import org.apache.spark.sql.expressions.Aggregator
 import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.types.{StructType, DataType}
+import org.apache.spark.sql.types._
 
 object TypedAggregateExpression {
   def apply[A, B : Encoder, C : Encoder](
@@ -67,8 +67,11 @@ case class TypedAggregateExpression(
 
   override def nullable: Boolean = true
 
-  // TODO: this assumes flat results...
-  override def dataType: DataType = cEncoder.schema.head.dataType
+  override def dataType: DataType = if (cEncoder.flat) {
+    cEncoder.schema.head.dataType
+  } else {
+    cEncoder.schema
+  }
 
   override def deterministic: Boolean = true
 
@@ -93,32 +96,51 @@ case class TypedAggregateExpression(
       case a: AttributeReference => inputMapping(a)
     })
 
-  // TODO: this probably only works when we are in the first column.
   val bAttributes = bEncoder.schema.toAttributes
   lazy val boundB = bEncoder.resolve(bAttributes).bind(bAttributes)
 
+  private def updateBuffer(buffer: MutableRow, value: InternalRow): Unit = {
+    // todo: need a more neat way to assign the value.
+    var i = 0
+    while (i < aggBufferAttributes.length) {
+      aggBufferSchema(i).dataType match {
+        case IntegerType => buffer.setInt(mutableAggBufferOffset + i, value.getInt(i))
+        case LongType => buffer.setLong(mutableAggBufferOffset + i, value.getLong(i))
+      }
+      i += 1
+    }
+  }
+
   override def initialize(buffer: MutableRow): Unit = {
-    // TODO: We need to either force Aggregator to have a zero or we need to eliminate the need for
-    // this in execution.
-    buffer.setInt(mutableAggBufferOffset, aggregator.zero.asInstanceOf[Int])
+    val zero = bEncoder.toRow(aggregator.zero)
+    updateBuffer(buffer, zero)
   }
 
   override def update(buffer: MutableRow, input: InternalRow): Unit = {
     val inputA = boundA.fromRow(input)
-    val currentB = boundB.fromRow(buffer)
+    val currentB = boundB.shift(mutableAggBufferOffset).fromRow(buffer)
     val merged = aggregator.reduce(currentB, inputA)
     val returned = boundB.toRow(merged)
-    buffer.setInt(mutableAggBufferOffset, returned.getInt(0))
+
+    updateBuffer(buffer, returned)
   }
 
   override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
-    buffer1.setLong(
-      mutableAggBufferOffset,
-      buffer1.getLong(mutableAggBufferOffset) + buffer2.getLong(inputAggBufferOffset))
+    val b1 = boundB.shift(mutableAggBufferOffset).fromRow(buffer1)
+    val b2 = boundB.shift(inputAggBufferOffset).fromRow(buffer2)
+    val merged = aggregator.merge(b1, b2)
+    val returned = boundB.toRow(merged)
+
+    updateBuffer(buffer1, returned)
   }
 
   override def eval(buffer: InternalRow): Any = {
-    buffer.getInt(mutableAggBufferOffset)
+    val b = boundB.shift(mutableAggBufferOffset).fromRow(buffer)
+    val result = cEncoder.toRow(aggregator.present(b))
+    dataType match {
+      case _: StructType => result
+      case _ => result.get(0, dataType)
+    }
   }
 
   override def toString: String = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 8cc25c244063..3c1c457e06d5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -57,6 +57,11 @@ abstract class Aggregator[-A, B, C] {
    */
   def reduce(b: B, a: A): B
 
+  /**
+   * Merge two intermediate values
+   */
+  def merge(b1: B, b2: B): B
+
   /**
    * Transform the output of the reduction.
    */
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 340470c096b8..206095a51976 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -34,9 +34,41 @@ class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializ
 
   override def reduce(b: N, a: I): N = numeric.plus(b, f(a))
 
+  override def merge(b1: N, b2: N): N = numeric.plus(b1, b2)
+
   override def present(reduction: N): N = reduction
 }
 
+object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] with Serializable {
+  override def zero: (Long, Long) = (0, 0)
+
+  override def reduce(countAndSum: (Long, Long), input: (String, Int)): (Long, Long) = {
+    (countAndSum._1 + 1, countAndSum._2 + input._2)
+  }
+
+  override def merge(b1: (Long, Long), b2: (Long, Long)): (Long, Long) = {
+    (b1._1 + b2._1, b1._2 + b2._2)
+  }
+
+  override def present(countAndSum: (Long, Long)): Double = countAndSum._2 / countAndSum._1
+}
+
+object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, Long)]
+  with Serializable {
+
+  override def zero: (Long, Long) = (0, 0)
+
+  override def reduce(countAndSum: (Long, Long), input: (String, Int)): (Long, Long) = {
+    (countAndSum._1 + 1, countAndSum._2 + input._2)
+  }
+
+  override def merge(b1: (Long, Long), b2: (Long, Long)): (Long, Long) = {
+    (b1._1 + b2._1, b1._2 + b2._2)
+  }
+
+  override def present(reduction: (Long, Long)): (Long, Long) = reduction
+}
+
 class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
 
   import testImplicits._
@@ -62,4 +94,24 @@ class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
         count("*")),
       ("a", 30, 30, 2L), ("b", 3, 3, 2L), ("c", 1, 1, 1L))
   }
+
+  test("typed aggregation: complex case") {
+    val ds = Seq("a" -> 1, "a" -> 3, "b" -> 3).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(
+        expr("avg(_2)").as[Double],
+        TypedAverage.toColumn),
+      ("a", 2.0, 2.0), ("b", 3.0, 3.0))
+  }
+
+  test("typed aggregation: complex result type") {
+    val ds = Seq("a" -> 1, "a" -> 3, "b" -> 3).toDS()
+
+    checkAnswer(
+      ds.groupBy(_._1).agg(
+        expr("avg(_2)").as[Double],
+        ComplexResultAgg.toColumn),
+      ("a", 2.0, (2L, 4L)), ("b", 3.0, (1L, 3L)))
+  }
 }

From 53600854c270d4c953fe95fbae528740b5cf6603 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 10 Nov 2015 11:21:31 -0800
Subject: [PATCH 599/896] [SPARK-11590][SQL] use native json_tuple in lateral
 view

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9562 from cloud-fan/json-tuple.
---
 .../expressions/jsonExpressions.scala         | 23 +++++---------
 .../expressions/JsonExpressionsSuite.scala    | 30 ++++++++++--------
 .../org/apache/spark/sql/DataFrame.scala      |  8 +++--
 .../org/apache/spark/sql/functions.scala      | 12 +++++++
 .../apache/spark/sql/JsonFunctionsSuite.scala | 23 ++++++++------
 .../org/apache/spark/sql/hive/HiveQl.scala    |  4 +++
 .../apache/spark/sql/hive/HiveQlSuite.scala   | 13 ++++++++
 .../sql/hive/execution/SQLQuerySuite.scala    | 31 +++++++++++++++++++
 8 files changed, 104 insertions(+), 40 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
index 8c9853e628d2..8cd73236a787 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala
@@ -314,7 +314,7 @@ case class GetJsonObject(json: Expression, path: Expression)
 }
 
 case class JsonTuple(children: Seq[Expression])
-  extends Expression with CodegenFallback {
+  extends Generator with CodegenFallback {
 
   import SharedFactory._
 
@@ -324,8 +324,8 @@ case class JsonTuple(children: Seq[Expression])
   }
 
   // if processing fails this shared value will be returned
-  @transient private lazy val nullRow: InternalRow =
-    new GenericInternalRow(Array.ofDim[Any](fieldExpressions.length))
+  @transient private lazy val nullRow: Seq[InternalRow] =
+    new GenericInternalRow(Array.ofDim[Any](fieldExpressions.length)) :: Nil
 
   // the json body is the first child
   @transient private lazy val jsonExpr: Expression = children.head
@@ -344,15 +344,8 @@ case class JsonTuple(children: Seq[Expression])
   // and count the number of foldable fields, we'll use this later to optimize evaluation
   @transient private lazy val constantFields: Int = foldableFieldNames.count(_ != null)
 
-  override lazy val dataType: StructType = {
-    val fields = fieldExpressions.zipWithIndex.map {
-      case (_, idx) => StructField(
-        name = s"c$idx", // mirroring GenericUDTFJSONTuple.initialize
-        dataType = StringType,
-        nullable = true)
-    }
-
-    StructType(fields)
+  override def elementTypes: Seq[(DataType, Boolean, String)] = fieldExpressions.zipWithIndex.map {
+    case (_, idx) => (StringType, true, s"c$idx")
   }
 
   override def prettyName: String = "json_tuple"
@@ -367,7 +360,7 @@ case class JsonTuple(children: Seq[Expression])
     }
   }
 
-  override def eval(input: InternalRow): InternalRow = {
+  override def eval(input: InternalRow): TraversableOnce[InternalRow] = {
     val json = jsonExpr.eval(input).asInstanceOf[UTF8String]
     if (json == null) {
       return nullRow
@@ -383,7 +376,7 @@ case class JsonTuple(children: Seq[Expression])
     }
   }
 
-  private def parseRow(parser: JsonParser, input: InternalRow): InternalRow = {
+  private def parseRow(parser: JsonParser, input: InternalRow): Seq[InternalRow] = {
     // only objects are supported
     if (parser.nextToken() != JsonToken.START_OBJECT) {
       return nullRow
@@ -433,7 +426,7 @@ case class JsonTuple(children: Seq[Expression])
       parser.skipChildren()
     }
 
-    new GenericInternalRow(row)
+    new GenericInternalRow(row) :: Nil
   }
 
   private def copyCurrentStructure(generator: JsonGenerator, parser: JsonParser): Unit = {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
index f33125f463e1..7b754091f471 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/JsonExpressionsSuite.scala
@@ -209,8 +209,12 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
     Literal("f5") ::
     Nil
 
+  private def checkJsonTuple(jt: JsonTuple, expected: InternalRow): Unit = {
+    assert(jt.eval(null).toSeq.head === expected)
+  }
+
   test("json_tuple - hive key 1") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(
         Literal("""{"f1": "value1", "f2": "value2", "f3": 3, "f5": 5.23}""") ::
           jsonTupleQuery),
@@ -218,7 +222,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 2") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(
         Literal("""{"f1": "value12", "f3": "value3", "f2": 2, "f4": 4.01}""") ::
           jsonTupleQuery),
@@ -226,7 +230,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 2 (mix of foldable fields)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("""{"f1": "value12", "f3": "value3", "f2": 2, "f4": 4.01}""") ::
         Literal("f1") ::
         NonFoldableLiteral("f2") ::
@@ -238,7 +242,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 3") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(
         Literal("""{"f1": "value13", "f4": "value44", "f3": "value33", "f2": 2, "f5": 5.01}""") ::
           jsonTupleQuery),
@@ -247,7 +251,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 3 (nonfoldable json)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(
         NonFoldableLiteral(
           """{"f1": "value13", "f4": "value44",
@@ -258,7 +262,7 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 3 (nonfoldable fields)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal(
         """{"f1": "value13", "f4": "value44",
           | "f3": "value33", "f2": 2, "f5": 5.01}""".stripMargin) ::
@@ -273,43 +277,43 @@ class JsonExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
   }
 
   test("json_tuple - hive key 4 - null json") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal(null) :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(null, null, null, null, null)))
   }
 
   test("json_tuple - hive key 5 - null and empty fields") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("""{"f1": "", "f5": null}""") :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(UTF8String.fromString(""), null, null, null, null)))
   }
 
   test("json_tuple - hive key 6 - invalid json (array)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("[invalid JSON string]") :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(null, null, null, null, null)))
   }
 
   test("json_tuple - invalid json (object start only)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("{") :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(null, null, null, null, null)))
   }
 
   test("json_tuple - invalid json (no object end)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("""{"foo": "bar"""") :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(null, null, null, null, null)))
   }
 
   test("json_tuple - invalid json (invalid json)") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("\\") :: jsonTupleQuery),
       InternalRow.fromSeq(Seq(null, null, null, null, null)))
   }
 
   test("json_tuple - preserve newlines") {
-    checkEvaluation(
+    checkJsonTuple(
       JsonTuple(Literal("{\"a\":\"b\nc\"}") :: Literal("a") :: Nil),
       InternalRow.fromSeq(Seq(UTF8String.fromString("b\nc"))))
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 3b69247dc54e..9368435a63c3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -750,10 +750,14 @@ class DataFrame private[sql](
       // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
       // make it a NamedExpression.
       case Column(u: UnresolvedAttribute) => UnresolvedAlias(u)
+
       case Column(expr: NamedExpression) => expr
-      // Leave an unaliased explode with an empty list of names since the analyzer will generate the
-      // correct defaults after the nested expression's type has been resolved.
+
+      // Leave an unaliased generator with an empty list of names since the analyzer will generate
+      // the correct defaults after the nested expression's type has been resolved.
       case Column(explode: Explode) => MultiAlias(explode, Nil)
+      case Column(jt: JsonTuple) => MultiAlias(jt, Nil)
+
       case Column(expr: Expression) => Alias(expr, expr.prettyString)()
     }
     Project(namedExpressions.toSeq, logicalPlan)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 22104e4d4861..a59d738010f7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -2307,6 +2307,18 @@ object functions extends LegacyFunctions {
    */
   def explode(e: Column): Column = withExpr { Explode(e.expr) }
 
+  /**
+   * Creates a new row for a json column according to the given field names.
+   *
+   * @group collection_funcs
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def json_tuple(json: Column, fields: String*): Column = withExpr {
+    require(fields.length > 0, "at least 1 field name should be given.")
+    JsonTuple(json.expr +: fields.map(Literal.apply))
+  }
+
   /**
    * Returns length of array or map.
    *
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
index e3531d0d6d79..14fd56fc8c22 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala
@@ -41,23 +41,26 @@ class JsonFunctionsSuite extends QueryTest with SharedSQLContext {
 
   test("json_tuple select") {
     val df: DataFrame = tuples.toDF("key", "jstring")
-    val expected = Row("1", Row("value1", "value2", "3", null, "5.23")) ::
-      Row("2", Row("value12", "2", "value3", "4.01", null)) ::
-      Row("3", Row("value13", "2", "value33", "value44", "5.01")) ::
-      Row("4", Row(null, null, null, null, null)) ::
-      Row("5", Row("", null, null, null, null)) ::
-      Row("6", Row(null, null, null, null, null)) ::
+    val expected =
+      Row("1", "value1", "value2", "3", null, "5.23") ::
+      Row("2", "value12", "2", "value3", "4.01", null) ::
+      Row("3", "value13", "2", "value33", "value44", "5.01") ::
+      Row("4", null, null, null, null, null) ::
+      Row("5", "", null, null, null, null) ::
+      Row("6", null, null, null, null, null) ::
       Nil
 
-    checkAnswer(df.selectExpr("key", "json_tuple(jstring, 'f1', 'f2', 'f3', 'f4', 'f5')"), expected)
+    checkAnswer(
+      df.select($"key", functions.json_tuple($"jstring", "f1", "f2", "f3", "f4", "f5")),
+      expected)
   }
 
   test("json_tuple filter and group") {
     val df: DataFrame = tuples.toDF("key", "jstring")
     val expr = df
-      .selectExpr("json_tuple(jstring, 'f1', 'f2') as jt")
-      .where($"jt.c0".isNotNull)
-      .groupBy($"jt.c1")
+      .select(functions.json_tuple($"jstring", "f1", "f2"))
+      .where($"c0".isNotNull)
+      .groupBy($"c1")
       .count()
 
     val expected = Row(null, 1) ::
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
index 6f8ed413a06c..091caab921fe 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala
@@ -1821,6 +1821,7 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
   }
 
   val explode = "(?i)explode".r
+  val jsonTuple = "(?i)json_tuple".r
   def nodesToGenerator(nodes: Seq[Node]): (Generator, Seq[String]) = {
     val function = nodes.head
 
@@ -1833,6 +1834,9 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C
       case Token("TOK_FUNCTION", Token(explode(), Nil) :: child :: Nil) =>
         (Explode(nodeToExpr(child)), attributes)
 
+      case Token("TOK_FUNCTION", Token(jsonTuple(), Nil) :: children) =>
+        (JsonTuple(children.map(nodeToExpr)), attributes)
+
       case Token("TOK_FUNCTION", Token(functionName, Nil) :: children) =>
         val functionInfo: FunctionInfo =
           Option(FunctionRegistry.getFunctionInfo(functionName.toLowerCase)).getOrElse(
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
index 528a7398b10d..a330362b4e1d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveQlSuite.scala
@@ -18,6 +18,8 @@
 package org.apache.spark.sql.hive
 
 import org.apache.hadoop.hive.serde.serdeConstants
+import org.apache.spark.sql.catalyst.expressions.JsonTuple
+import org.apache.spark.sql.catalyst.plans.logical.Generate
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.SparkFunSuite
@@ -183,4 +185,15 @@ class HiveQlSuite extends SparkFunSuite with BeforeAndAfterAll {
     assertError("select interval '.1111111111' second",
       "nanosecond 1111111111 outside range")
   }
+
+  test("use native json_tuple instead of hive's UDTF in LATERAL VIEW") {
+    val plan = HiveQl.parseSql(
+      """
+        |SELECT *
+        |FROM (SELECT '{"f1": "value1", "f2": 12}' json) test
+        |LATERAL VIEW json_tuple(json, 'f1', 'f2') jt AS a, b
+      """.stripMargin)
+
+    assert(plan.children.head.asInstanceOf[Generate].generator.isInstanceOf[JsonTuple])
+  }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
index 9a425d7f6b26..3427152b2da0 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala
@@ -1448,4 +1448,35 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
         Row("1", "10") :: Row("2", "20") :: Row("3", "30") :: Row("4", "40") :: Nil)
     }
   }
+
+  test("SPARK-11590: use native json_tuple in lateral view") {
+    checkAnswer(sql(
+      """
+        |SELECT a, b
+        |FROM (SELECT '{"f1": "value1", "f2": 12}' json) test
+        |LATERAL VIEW json_tuple(json, 'f1', 'f2') jt AS a, b
+      """.stripMargin), Row("value1", "12"))
+
+    // we should use `c0`, `c1`... as the name of fields if no alias is provided, to follow hive.
+    checkAnswer(sql(
+      """
+        |SELECT c0, c1
+        |FROM (SELECT '{"f1": "value1", "f2": 12}' json) test
+        |LATERAL VIEW json_tuple(json, 'f1', 'f2') jt
+      """.stripMargin), Row("value1", "12"))
+
+    // we can also use `json_tuple` in project list.
+    checkAnswer(sql(
+      """
+        |SELECT json_tuple(json, 'f1', 'f2')
+        |FROM (SELECT '{"f1": "value1", "f2": 12}' json) test
+      """.stripMargin), Row("value1", "12"))
+
+    // we can also mix `json_tuple` with other project expressions.
+    checkAnswer(sql(
+      """
+        |SELECT json_tuple(json, 'f1', 'f2'), 3.14, str
+        |FROM (SELECT '{"f1": "value1", "f2": 12}' json, 'hello' as str) test
+      """.stripMargin), Row("value1", "12", 3.14, "hello"))
+  }
 }

From 87aedc48c01dffbd880e6ca84076ed47c68f88d0 Mon Sep 17 00:00:00 2001
From: Nong Li <nong@databricks.com>
Date: Tue, 10 Nov 2015 11:28:53 -0800
Subject: [PATCH 600/896] [SPARK-10371][SQL] Implement subexpr elimination for
 UnsafeProjections

This patch adds the building blocks for codegening subexpr elimination and implements
it end to end for UnsafeProjection. The building blocks can be used to do the same thing
for other operators.

It introduces some utilities to compute common sub expressions. Expressions can be added to
this data structure. The expr and its children will be recursively matched against existing
expressions (ones previously added) and grouped into common groups. This is built using
the existing `semanticEquals`. It does not understand things like commutative or associative
expressions. This can be done as future work.

After building this data structure, the codegen process takes advantage of it by:
  1. Generating a helper function in the generated class that computes the common
     subexpression. This is done for all common subexpressions that have at least
     two occurrences and the expression tree is sufficiently complex.
  2. When generating the apply() function, if the helper function exists, call that
     instead of regenerating the expression tree. Repeated calls to the helper function
     shortcircuit the evaluation logic.

Author: Nong Li <nong@databricks.com>
Author: Nong Li <nongli@gmail.com>

This patch had conflicts when merged, resolved by
Committer: Michael Armbrust <michael@databricks.com>

Closes #9480 from nongli/spark-10371.
---
 .../expressions/EquivalentExpressions.scala   | 106 ++++++++++++
 .../sql/catalyst/expressions/Expression.scala |  50 +++++-
 .../sql/catalyst/expressions/Projection.scala |  16 ++
 .../expressions/codegen/CodeGenerator.scala   | 110 ++++++++++++-
 .../codegen/GenerateUnsafeProjection.scala    |  36 ++++-
 .../expressions/namedExpressions.scala        |   4 +
 .../SubexpressionEliminationSuite.scala       | 153 ++++++++++++++++++
 .../scala/org/apache/spark/sql/SQLConf.scala  |   8 +
 .../spark/sql/execution/SparkPlan.scala       |   5 +
 .../spark/sql/execution/basicOperators.scala  |   3 +-
 .../org/apache/spark/sql/SQLQuerySuite.scala  |  48 ++++++
 11 files changed, 523 insertions(+), 16 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
new file mode 100644
index 000000000000..e7380d21f98a
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
@@ -0,0 +1,106 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions
+
+import scala.collection.mutable
+
+/**
+ * This class is used to compute equality of (sub)expression trees. Expressions can be added
+ * to this class and they subsequently query for expression equality. Expression trees are
+ * considered equal if for the same input(s), the same result is produced.
+ */
+class EquivalentExpressions {
+  /**
+   * Wrapper around an Expression that provides semantic equality.
+   */
+  case class Expr(e: Expression) {
+    val hash = e.semanticHash()
+    override def equals(o: Any): Boolean = o match {
+      case other: Expr => e.semanticEquals(other.e)
+      case _ => false
+    }
+    override def hashCode: Int = hash
+  }
+
+  // For each expression, the set of equivalent expressions.
+  private val equivalenceMap: mutable.HashMap[Expr, mutable.MutableList[Expression]] =
+      new mutable.HashMap[Expr, mutable.MutableList[Expression]]
+
+  /**
+   * Adds each expression to this data structure, grouping them with existing equivalent
+   * expressions. Non-recursive.
+   * Returns if there was already a matching expression.
+   */
+  def addExpr(expr: Expression): Boolean = {
+    if (expr.deterministic) {
+      val e: Expr = Expr(expr)
+      val f = equivalenceMap.get(e)
+      if (f.isDefined) {
+        f.get.+= (expr)
+        true
+      } else {
+        equivalenceMap.put(e, mutable.MutableList(expr))
+        false
+      }
+    } else {
+      false
+    }
+  }
+
+  /**
+   * Adds the expression to this datastructure recursively. Stops if a matching expression
+   * is found. That is, if `expr` has already been added, its children are not added.
+   * If ignoreLeaf is true, leaf nodes are ignored.
+   */
+  def addExprTree(root: Expression, ignoreLeaf: Boolean = true): Unit = {
+    val skip = root.isInstanceOf[LeafExpression] && ignoreLeaf
+    if (!skip && root.deterministic && !addExpr(root)) {
+     root.children.foreach(addExprTree(_, ignoreLeaf))
+    }
+  }
+
+  /**
+   * Returns all fo the expression trees that are equivalent to `e`. Returns
+   * an empty collection if there are none.
+   */
+  def getEquivalentExprs(e: Expression): Seq[Expression] = {
+    equivalenceMap.get(Expr(e)).getOrElse(mutable.MutableList())
+  }
+
+  /**
+   * Returns all the equivalent sets of expressions.
+   */
+  def getAllEquivalentExprs: Seq[Seq[Expression]] = {
+    equivalenceMap.values.map(_.toSeq).toSeq
+  }
+
+  /**
+   * Returns the state of the datastructure as a string. If all is false, skips sets of equivalent
+   * expressions with cardinality 1.
+   */
+  def debugString(all: Boolean = false): String = {
+    val sb: mutable.StringBuilder = new StringBuilder()
+    sb.append("Equivalent expressions:\n")
+    equivalenceMap.foreach { case (k, v) => {
+      if (all || v.length > 1) {
+        sb.append("  " + v.mkString(", ")).append("\n")
+      }
+    }}
+    sb.toString()
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
index 96fcc799e537..7d5741eefcc7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
@@ -92,12 +92,24 @@ abstract class Expression extends TreeNode[Expression] {
    * @return [[GeneratedExpressionCode]]
    */
   def gen(ctx: CodeGenContext): GeneratedExpressionCode = {
-    val isNull = ctx.freshName("isNull")
-    val primitive = ctx.freshName("primitive")
-    val ve = GeneratedExpressionCode("", isNull, primitive)
-    ve.code = genCode(ctx, ve)
-    // Add `this` in the comment.
-    ve.copy(s"/* $this */\n" + ve.code)
+    val subExprState = ctx.subExprEliminationExprs.get(this)
+    if (subExprState.isDefined) {
+      // This expression is repeated meaning the code to evaluated has already been added
+      // as a function, `subExprState.fnName`. Just call that.
+      val code =
+        s"""
+           |/* $this */
+           |${subExprState.get.fnName}(${ctx.INPUT_ROW});
+           |""".stripMargin.trim
+      GeneratedExpressionCode(code, subExprState.get.code.isNull, subExprState.get.code.value)
+    } else {
+      val isNull = ctx.freshName("isNull")
+      val primitive = ctx.freshName("primitive")
+      val ve = GeneratedExpressionCode("", isNull, primitive)
+      ve.code = genCode(ctx, ve)
+      // Add `this` in the comment.
+      ve.copy(s"/* $this */\n" + ve.code.trim)
+    }
   }
 
   /**
@@ -145,11 +157,37 @@ abstract class Expression extends TreeNode[Expression] {
         case (i1, i2) => i1 == i2
       }
     }
+    // Non-determinstic expressions cannot be equal
+    if (!deterministic || !other.deterministic) return false
     val elements1 = this.productIterator.toSeq
     val elements2 = other.asInstanceOf[Product].productIterator.toSeq
     checkSemantic(elements1, elements2)
   }
 
+  /**
+   * Returns the hash for this expression. Expressions that compute the same result, even if
+   * they differ cosmetically should return the same hash.
+   */
+  def semanticHash() : Int = {
+    def computeHash(e: Seq[Any]): Int = {
+      // See http://stackoverflow.com/questions/113511/hash-code-implementation
+      var hash: Int = 17
+      e.foreach(i => {
+        val h: Int = i match {
+          case (e: Expression) => e.semanticHash()
+          case (Some(e: Expression)) => e.semanticHash()
+          case (t: Traversable[_]) => computeHash(t.toSeq)
+          case null => 0
+          case (o) => o.hashCode()
+        }
+        hash = hash * 37 + h
+      })
+      hash
+    }
+
+    computeHash(this.productIterator.toSeq)
+  }
+
   /**
    * Checks the input data types, returns `TypeCheckResult.success` if it's valid,
    * or returns a `TypeCheckResult` with an error message if invalid.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
index 79dabe8e925a..9f0b7821ae74 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
@@ -144,6 +144,22 @@ object UnsafeProjection {
   def create(exprs: Seq[Expression], inputSchema: Seq[Attribute]): UnsafeProjection = {
     create(exprs.map(BindReferences.bindReference(_, inputSchema)))
   }
+
+  /**
+    * Same as other create()'s but allowing enabling/disabling subexpression elimination.
+    * TODO: refactor the plumbing and clean this up.
+    */
+  def create(
+      exprs: Seq[Expression],
+      inputSchema: Seq[Attribute],
+      subexpressionEliminationEnabled: Boolean): UnsafeProjection = {
+    val e = exprs.map(BindReferences.bindReference(_, inputSchema))
+      .map(_ transform {
+        case CreateStruct(children) => CreateStructUnsafe(children)
+        case CreateNamedStruct(children) => CreateNamedStructUnsafe(children)
+    })
+    GenerateUnsafeProjection.generate(e, subexpressionEliminationEnabled)
+  }
 }
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index f0f7a6cf0cc4..60a3d6018496 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -92,6 +92,33 @@ class CodeGenContext {
     addedFunctions += ((funcName, funcCode))
   }
 
+  /**
+   * Holds expressions that are equivalent. Used to perform subexpression elimination
+   * during codegen.
+   *
+   * For expressions that appear more than once, generate additional code to prevent
+   * recomputing the value.
+   *
+   * For example, consider two exprsesion generated from this SQL statement:
+   *  SELECT (col1 + col2), (col1 + col2) / col3.
+   *
+   *  equivalentExpressions will match the tree containing `col1 + col2` and it will only
+   *  be evaluated once.
+   */
+  val equivalentExpressions: EquivalentExpressions = new EquivalentExpressions
+
+  // State used for subexpression elimination.
+  case class SubExprEliminationState(
+    val isLoaded: String, code: GeneratedExpressionCode, val fnName: String)
+
+  // Foreach expression that is participating in subexpression elimination, the state to use.
+  val subExprEliminationExprs: mutable.HashMap[Expression, SubExprEliminationState] =
+    mutable.HashMap[Expression, SubExprEliminationState]()
+
+  // The collection of isLoaded variables that need to be reset on each row.
+  val subExprIsLoadedVariables: mutable.ArrayBuffer[String] =
+    mutable.ArrayBuffer.empty[String]
+
   final val JAVA_BOOLEAN = "boolean"
   final val JAVA_BYTE = "byte"
   final val JAVA_SHORT = "short"
@@ -317,6 +344,87 @@ class CodeGenContext {
       functions.map(name => s"$name($row);").mkString("\n")
     }
   }
+
+  /**
+   * Checks and sets up the state and codegen for subexpression elimination. This finds the
+   * common subexpresses, generates the functions that evaluate those expressions and populates
+   * the mapping of common subexpressions to the generated functions.
+   */
+  private def subexpressionElimination(expressions: Seq[Expression]) = {
+    // Add each expression tree and compute the common subexpressions.
+    expressions.foreach(equivalentExpressions.addExprTree(_))
+
+    // Get all the exprs that appear at least twice and set up the state for subexpression
+    // elimination.
+    val commonExprs = equivalentExpressions.getAllEquivalentExprs.filter(_.size > 1)
+    commonExprs.foreach(e => {
+      val expr = e.head
+      val isLoaded = freshName("isLoaded")
+      val isNull = freshName("isNull")
+      val primitive = freshName("primitive")
+      val fnName = freshName("evalExpr")
+
+      // Generate the code for this expression tree and wrap it in a function.
+      val code = expr.gen(this)
+      val fn =
+        s"""
+           |private void $fnName(InternalRow ${INPUT_ROW}) {
+           |  if (!$isLoaded) {
+           |    ${code.code.trim}
+           |    $isLoaded = true;
+           |    $isNull = ${code.isNull};
+           |    $primitive = ${code.value};
+           |  }
+           |}
+           """.stripMargin
+      code.code = fn
+      code.isNull = isNull
+      code.value = primitive
+
+      addNewFunction(fnName, fn)
+
+      // Add a state and a mapping of the common subexpressions that are associate with this
+      // state. Adding this expression to subExprEliminationExprMap means it will call `fn`
+      // when it is code generated. This decision should be a cost based one.
+      //
+      // The cost of doing subexpression elimination is:
+      //   1. Extra function call, although this is probably *good* as the JIT can decide to
+      //      inline or not.
+      //   2. Extra branch to check isLoaded. This branch is likely to be predicted correctly
+      //      very often. The reason it is not loaded is because of a prior branch.
+      //   3. Extra store into isLoaded.
+      // The benefit doing subexpression elimination is:
+      //   1. Running the expression logic. Even for a simple expression, it is likely more than 3
+      //      above.
+      //   2. Less code.
+      // Currently, we will do this for all non-leaf only expression trees (i.e. expr trees with
+      // at least two nodes) as the cost of doing it is expected to be low.
+
+      // Maintain the loaded value and isNull as member variables. This is necessary if the codegen
+      // function is split across multiple functions.
+      // TODO: maintaining this as a local variable probably allows the compiler to do better
+      // optimizations.
+      addMutableState("boolean", isLoaded, s"$isLoaded = false;")
+      addMutableState("boolean", isNull, s"$isNull = false;")
+      addMutableState(javaType(expr.dataType), primitive,
+        s"$primitive = ${defaultValue(expr.dataType)};")
+      subExprIsLoadedVariables += isLoaded
+
+      val state = SubExprEliminationState(isLoaded, code, fnName)
+      e.foreach(subExprEliminationExprs.put(_, state))
+    })
+  }
+
+  /**
+   * Generates code for expressions. If doSubexpressionElimination is true, subexpression
+   * elimination will be performed. Subexpression elimination assumes that the code will for each
+   * expression will be combined in the `expressions` order.
+   */
+  def generateExpressions(expressions: Seq[Expression],
+      doSubexpressionElimination: Boolean = false): Seq[GeneratedExpressionCode] = {
+    if (doSubexpressionElimination) subexpressionElimination(expressions)
+    expressions.map(e => e.gen(this))
+  }
 }
 
 /**
@@ -349,7 +457,7 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
   }
 
   protected def declareAddedFunctions(ctx: CodeGenContext): String = {
-    ctx.addedFunctions.map { case (funcName, funcCode) => funcCode }.mkString("\n")
+    ctx.addedFunctions.map { case (funcName, funcCode) => funcCode }.mkString("\n").trim
   }
 
   /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 2136f82ba475..9ef226141421 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -139,9 +139,9 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
         s"""
           ${input.code}
           if (${input.isNull}) {
-            $setNull
+            ${setNull.trim}
           } else {
-            $writeField
+            ${writeField.trim}
           }
         """
     }
@@ -149,7 +149,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     s"""
       $rowWriter.initialize($bufferHolder, ${inputs.length});
       ${ctx.splitExpressions(row, writeFields)}
-    """
+    """.trim
   }
 
   // TODO: if the nullability of array element is correct, we can use it to save null check.
@@ -275,8 +275,11 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     """
   }
 
-  def createCode(ctx: CodeGenContext, expressions: Seq[Expression]): GeneratedExpressionCode = {
-    val exprEvals = expressions.map(e => e.gen(ctx))
+  def createCode(
+      ctx: CodeGenContext,
+      expressions: Seq[Expression],
+      useSubexprElimination: Boolean = false): GeneratedExpressionCode = {
+    val exprEvals = ctx.generateExpressions(expressions, useSubexprElimination)
     val exprTypes = expressions.map(_.dataType)
 
     val result = ctx.freshName("result")
@@ -285,10 +288,15 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     val holderClass = classOf[BufferHolder].getName
     ctx.addMutableState(holderClass, bufferHolder, s"this.$bufferHolder = new $holderClass();")
 
+    // Reset the isLoaded flag for each row.
+    val subexprReset = ctx.subExprIsLoadedVariables.map { v => s"${v} = false;" }.mkString("\n")
+
     val code =
       s"""
         $bufferHolder.reset();
+        $subexprReset
         ${writeExpressionsToBuffer(ctx, ctx.INPUT_ROW, exprEvals, exprTypes, bufferHolder)}
+
         $result.pointTo($bufferHolder.buffer, ${expressions.length}, $bufferHolder.totalSize());
       """
     GeneratedExpressionCode(code, "false", result)
@@ -300,10 +308,21 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
   protected def bind(in: Seq[Expression], inputSchema: Seq[Attribute]): Seq[Expression] =
     in.map(BindReferences.bindReference(_, inputSchema))
 
+  def generate(
+    expressions: Seq[Expression],
+    subexpressionEliminationEnabled: Boolean): UnsafeProjection = {
+    create(canonicalize(expressions), subexpressionEliminationEnabled)
+  }
+
   protected def create(expressions: Seq[Expression]): UnsafeProjection = {
-    val ctx = newCodeGenContext()
+    create(expressions, false)
+  }
 
-    val eval = createCode(ctx, expressions)
+  private def create(
+      expressions: Seq[Expression],
+      subexpressionEliminationEnabled: Boolean): UnsafeProjection = {
+    val ctx = newCodeGenContext()
+    val eval = createCode(ctx, expressions, subexpressionEliminationEnabled)
 
     val code = s"""
       public Object generate($exprType[] exprs) {
@@ -315,6 +334,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
         private $exprType[] expressions;
 
         ${declareMutableStates(ctx)}
+
         ${declareAddedFunctions(ctx)}
 
         public SpecificUnsafeProjection($exprType[] expressions) {
@@ -328,7 +348,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
         }
 
         public UnsafeRow apply(InternalRow ${ctx.INPUT_ROW}) {
-          ${eval.code}
+          ${eval.code.trim}
           return ${eval.value};
         }
       }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 9ab5c299d0f5..f80bcfcb0b0b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -203,6 +203,10 @@ case class AttributeReference(
     case _ => false
   }
 
+  override def semanticHash(): Int = {
+    this.exprId.hashCode()
+  }
+
   override def hashCode: Int = {
     // See http://stackoverflow.com/questions/113511/hash-code-implementation
     var h = 17
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
new file mode 100644
index 000000000000..9de066e99d63
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
@@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.sql.catalyst.expressions
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.types.IntegerType
+
+class SubexpressionEliminationSuite extends SparkFunSuite {
+  test("Semantic equals and hash") {
+    val id = ExprId(1)
+    val a: AttributeReference = AttributeReference("name", IntegerType)()
+    val b1 = a.withName("name2").withExprId(id)
+    val b2 = a.withExprId(id)
+
+    assert(b1 != b2)
+    assert(a != b1)
+    assert(b1.semanticEquals(b2))
+    assert(!b1.semanticEquals(a))
+    assert(a.hashCode != b1.hashCode)
+    assert(b1.hashCode == b2.hashCode)
+    assert(b1.semanticHash() == b2.semanticHash())
+  }
+
+  test("Expression Equivalence - basic") {
+    val equivalence = new EquivalentExpressions
+    assert(equivalence.getAllEquivalentExprs.isEmpty)
+
+    val oneA = Literal(1)
+    val oneB = Literal(1)
+    val twoA = Literal(2)
+    var twoB = Literal(2)
+
+    assert(equivalence.getEquivalentExprs(oneA).isEmpty)
+    assert(equivalence.getEquivalentExprs(twoA).isEmpty)
+
+    // Add oneA and test if it is returned. Since it is a group of one, it does not.
+    assert(!equivalence.addExpr(oneA))
+    assert(equivalence.getEquivalentExprs(oneA).size == 1)
+    assert(equivalence.getEquivalentExprs(twoA).isEmpty)
+    assert(equivalence.addExpr((oneA)))
+    assert(equivalence.getEquivalentExprs(oneA).size == 2)
+
+    // Add B and make sure they can see each other.
+    assert(equivalence.addExpr(oneB))
+    // Use exists and reference equality because of how equals is defined.
+    assert(equivalence.getEquivalentExprs(oneA).exists(_ eq oneB))
+    assert(equivalence.getEquivalentExprs(oneA).exists(_ eq oneA))
+    assert(equivalence.getEquivalentExprs(oneB).exists(_ eq oneA))
+    assert(equivalence.getEquivalentExprs(oneB).exists(_ eq oneB))
+    assert(equivalence.getEquivalentExprs(twoA).isEmpty)
+    assert(equivalence.getAllEquivalentExprs.size == 1)
+    assert(equivalence.getAllEquivalentExprs.head.size == 3)
+    assert(equivalence.getAllEquivalentExprs.head.contains(oneA))
+    assert(equivalence.getAllEquivalentExprs.head.contains(oneB))
+
+    val add1 = Add(oneA, oneB)
+    val add2 = Add(oneA, oneB)
+
+    equivalence.addExpr(add1)
+    equivalence.addExpr(add2)
+
+    assert(equivalence.getAllEquivalentExprs.size == 2)
+    assert(equivalence.getEquivalentExprs(add2).exists(_ eq add1))
+    assert(equivalence.getEquivalentExprs(add2).size == 2)
+    assert(equivalence.getEquivalentExprs(add1).exists(_ eq add2))
+  }
+
+  test("Expression Equivalence - Trees") {
+    val one = Literal(1)
+    val two = Literal(2)
+
+    val add = Add(one, two)
+    val abs = Abs(add)
+    val add2 = Add(add, add)
+
+    var equivalence = new EquivalentExpressions
+    equivalence.addExprTree(add, true)
+    equivalence.addExprTree(abs, true)
+    equivalence.addExprTree(add2, true)
+
+    // Should only have one equivalence for `one + two`
+    assert(equivalence.getAllEquivalentExprs.filter(_.size > 1).size == 1)
+    assert(equivalence.getAllEquivalentExprs.filter(_.size > 1).head.size == 4)
+
+    // Set up the expressions
+    //   one * two,
+    //   (one * two) * (one * two)
+    //   sqrt( (one * two) * (one * two) )
+    //   (one * two) + sqrt( (one * two) * (one * two) )
+    equivalence = new EquivalentExpressions
+    val mul = Multiply(one, two)
+    val mul2 = Multiply(mul, mul)
+    val sqrt = Sqrt(mul2)
+    val sum = Add(mul2, sqrt)
+    equivalence.addExprTree(mul, true)
+    equivalence.addExprTree(mul2, true)
+    equivalence.addExprTree(sqrt, true)
+    equivalence.addExprTree(sum, true)
+
+    // (one * two), (one * two) * (one * two) and sqrt( (one * two) * (one * two) ) should be found
+    assert(equivalence.getAllEquivalentExprs.filter(_.size > 1).size == 3)
+    assert(equivalence.getEquivalentExprs(mul).size == 3)
+    assert(equivalence.getEquivalentExprs(mul2).size == 3)
+    assert(equivalence.getEquivalentExprs(sqrt).size == 2)
+    assert(equivalence.getEquivalentExprs(sum).size == 1)
+
+    // Some expressions inspired by TPCH-Q1
+    // sum(l_quantity) as sum_qty,
+    // sum(l_extendedprice) as sum_base_price,
+    // sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,
+    // sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
+    // avg(l_extendedprice) as avg_price,
+    // avg(l_discount) as avg_disc
+    equivalence = new EquivalentExpressions
+    val quantity = Literal(1)
+    val price = Literal(1.1)
+    val discount = Literal(.24)
+    val tax = Literal(0.1)
+    equivalence.addExprTree(quantity, false)
+    equivalence.addExprTree(price, false)
+    equivalence.addExprTree(Multiply(price, Subtract(Literal(1), discount)), false)
+    equivalence.addExprTree(
+      Multiply(
+        Multiply(price, Subtract(Literal(1), discount)),
+        Add(Literal(1), tax)), false)
+    equivalence.addExprTree(price, false)
+    equivalence.addExprTree(discount, false)
+    // quantity, price, discount and (price * (1 - discount))
+    assert(equivalence.getAllEquivalentExprs.filter(_.size > 1).size == 4)
+  }
+
+  test("Expression equivalence - non deterministic") {
+    val sum = Add(Rand(0), Rand(0))
+    val equivalence = new EquivalentExpressions
+    equivalence.addExpr(sum)
+    equivalence.addExpr(sum)
+    assert(equivalence.getAllEquivalentExprs.isEmpty)
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index b7314189b540..89e196c06600 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -268,6 +268,11 @@ private[spark] object SQLConf {
     doc = "When true, use the new optimized Tungsten physical execution backend.",
     isPublic = false)
 
+  val SUBEXPRESSION_ELIMINATION_ENABLED = booleanConf("spark.sql.subexpressionElimination.enabled",
+    defaultValue = Some(true),  // use CODEGEN_ENABLED as default
+    doc = "When true, common subexpressions will be eliminated.",
+    isPublic = false)
+
   val DIALECT = stringConf(
     "spark.sql.dialect",
     defaultValue = Some("sql"),
@@ -541,6 +546,9 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def unsafeEnabled: Boolean = getConf(UNSAFE_ENABLED, getConf(TUNGSTEN_ENABLED))
 
+  private[spark] def subexpressionEliminationEnabled: Boolean =
+    getConf(SUBEXPRESSION_ELIMINATION_ENABLED, codegenEnabled)
+
   private[spark] def autoBroadcastJoinThreshold: Int = getConf(AUTO_BROADCASTJOIN_THRESHOLD)
 
   private[spark] def defaultSizeInBytes: Long =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
index 8bb293ae87e6..8650ac500b65 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
@@ -66,6 +66,11 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
   } else {
     false
   }
+  val subexpressionEliminationEnabled: Boolean = if (sqlContext != null) {
+    sqlContext.conf.subexpressionEliminationEnabled
+  } else {
+    false
+  }
 
   /**
    * Whether the "prepare" method is called.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 145de0db9eda..303d636164ad 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -70,7 +70,8 @@ case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan)
   protected override def doExecute(): RDD[InternalRow] = {
     val numRows = longMetric("numRows")
     child.execute().mapPartitions { iter =>
-      val project = UnsafeProjection.create(projectList, child.output)
+      val project = UnsafeProjection.create(projectList, child.output,
+        subexpressionEliminationEnabled)
       iter.map { row =>
         numRows += 1
         project(row)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 441a0c6d0e36..19e850a46fdf 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1970,4 +1970,52 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         Row(1, 1) :: Row(1, 2) :: Row(2, 1) :: Row(2, 2) :: Row(3, 1) :: Row(3, 2) :: Nil)
     }
   }
+
+  test("Common subexpression elimination") {
+    // select from a table to prevent constant folding.
+    val df = sql("SELECT a, b from testData2 limit 1")
+    checkAnswer(df, Row(1, 1))
+
+    checkAnswer(df.selectExpr("a + 1", "a + 1"), Row(2, 2))
+    checkAnswer(df.selectExpr("a + 1", "a + 1 + 1"), Row(2, 3))
+
+    // This does not work because the expressions get grouped like (a + a) + 1
+    checkAnswer(df.selectExpr("a + 1", "a + a + 1"), Row(2, 3))
+    checkAnswer(df.selectExpr("a + 1", "a + (a + 1)"), Row(2, 3))
+
+    // Identity udf that tracks the number of times it is called.
+    val countAcc = sparkContext.accumulator(0, "CallCount")
+    sqlContext.udf.register("testUdf", (x: Int) => {
+      countAcc.++=(1)
+      x
+    })
+
+    // Evaluates df, verifying it is equal to the expectedResult and the accumulator's value
+    // is correct.
+    def verifyCallCount(df: DataFrame, expectedResult: Row, expectedCount: Int): Unit = {
+      countAcc.setValue(0)
+      checkAnswer(df, expectedResult)
+      assert(countAcc.value == expectedCount)
+    }
+
+    verifyCallCount(df.selectExpr("testUdf(a)"), Row(1), 1)
+    verifyCallCount(df.selectExpr("testUdf(a)", "testUdf(a)"), Row(1, 1), 1)
+    verifyCallCount(df.selectExpr("testUdf(a + 1)", "testUdf(a + 1)"), Row(2, 2), 1)
+    verifyCallCount(df.selectExpr("testUdf(a + 1)", "testUdf(a)"), Row(2, 1), 2)
+    verifyCallCount(
+      df.selectExpr("testUdf(a + 1) + testUdf(a + 1)", "testUdf(a + 1)"), Row(4, 2), 1)
+
+    verifyCallCount(
+      df.selectExpr("testUdf(a + 1) + testUdf(1 + b)", "testUdf(a + 1)"), Row(4, 2), 2)
+
+    // Would be nice if semantic equals for `+` understood commutative
+    verifyCallCount(
+      df.selectExpr("testUdf(a + 1) + testUdf(1 + a)", "testUdf(a + 1)"), Row(4, 2), 2)
+
+    // Try disabling it via configuration.
+    sqlContext.setConf("spark.sql.subexpressionElimination.enabled", "false")
+    verifyCallCount(df.selectExpr("testUdf(a)", "testUdf(a)"), Row(1, 1), 2)
+    sqlContext.setConf("spark.sql.subexpressionElimination.enabled", "true")
+    verifyCallCount(df.selectExpr("testUdf(a)", "testUdf(a)"), Row(1, 1), 1)
+  }
 }

From f14e95115c0939a77ebcb00209696a87fd651ff9 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 10 Nov 2015 11:34:36 -0800
Subject: [PATCH 601/896] [ML][R] SparkR::glm summary result to compare with
 native R

Follow up #9561. Due to [SPARK-11587](https://issues.apache.org/jira/browse/SPARK-11587) has been fixed, we should compare SparkR::glm summary result with native R output rather than hard-code one. mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9590 from yanboliang/glm-r-test.
---
 R/pkg/R/mllib.R               |  2 +-
 R/pkg/inst/tests/test_mllib.R | 31 ++++++++++---------------------
 2 files changed, 11 insertions(+), 22 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index 7126b7cde4bd..f23e1c7f1fce 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -106,7 +106,7 @@ setMethod("summary", signature(object = "PipelineModel"),
               coefficients <- matrix(coefficients, ncol = 4)
               colnames(coefficients) <- c("Estimate", "Std. Error", "t value", "Pr(>|t|)")
               rownames(coefficients) <- unlist(features)
-              return(list(DevianceResiduals = devianceResiduals, Coefficients = coefficients))
+              return(list(devianceResiduals = devianceResiduals, coefficients = coefficients))
             } else {
               coefficients <- as.matrix(unlist(coefficients))
               colnames(coefficients) <- c("Estimate")
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index 42287ea19adc..d497ad8c9daa 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -72,22 +72,17 @@ test_that("feature interaction vs native glm", {
 test_that("summary coefficients match with native glm", {
   training <- createDataFrame(sqlContext, iris)
   stats <- summary(glm(Sepal_Width ~ Sepal_Length + Species, data = training, solver = "normal"))
-  coefs <- unlist(stats$Coefficients)
-  devianceResiduals <- unlist(stats$DevianceResiduals)
+  coefs <- unlist(stats$coefficients)
+  devianceResiduals <- unlist(stats$devianceResiduals)
 
-  rCoefs <- as.vector(coef(glm(Sepal.Width ~ Sepal.Length + Species, data = iris)))
-  rStdError <- c(0.23536, 0.04630, 0.07207, 0.09331)
-  rTValue <- c(7.123, 7.557, -13.644, -10.798)
-  rPValue <- c(0.0, 0.0, 0.0, 0.0)
+  rStats <- summary(glm(Sepal.Width ~ Sepal.Length + Species, data = iris))
+  rCoefs <- unlist(rStats$coefficients)
   rDevianceResiduals <- c(-0.95096, 0.72918)
 
-  expect_true(all(abs(rCoefs - coefs[1:4]) < 1e-6))
-  expect_true(all(abs(rStdError - coefs[5:8]) < 1e-5))
-  expect_true(all(abs(rTValue - coefs[9:12]) < 1e-3))
-  expect_true(all(abs(rPValue - coefs[13:16]) < 1e-6))
+  expect_true(all(abs(rCoefs - coefs) < 1e-5))
   expect_true(all(abs(rDevianceResiduals - devianceResiduals) < 1e-5))
   expect_true(all(
-    rownames(stats$Coefficients) ==
+    rownames(stats$coefficients) ==
     c("(Intercept)", "Sepal_Length", "Species_versicolor", "Species_virginica")))
 })
 
@@ -96,21 +91,15 @@ test_that("summary coefficients match with native glm of family 'binomial'", {
   training <- filter(df, df$Species != "setosa")
   stats <- summary(glm(Species ~ Sepal_Length + Sepal_Width, data = training,
     family = "binomial"))
-  coefs <- as.vector(stats$Coefficients)
+  coefs <- as.vector(stats$coefficients[,1])
 
   rTraining <- iris[iris$Species %in% c("versicolor","virginica"),]
   rCoefs <- as.vector(coef(glm(Species ~ Sepal.Length + Sepal.Width, data = rTraining,
     family = binomial(link = "logit"))))
-  rStdError <- c(3.0974, 0.5169, 0.8628)
-  rTValue <- c(-4.212, 3.680, 0.469)
-  rPValue <- c(0.000, 0.000, 0.639)
-
-  expect_true(all(abs(rCoefs - coefs[1:3]) < 1e-4))
-  expect_true(all(abs(rStdError - coefs[4:6]) < 1e-4))
-  expect_true(all(abs(rTValue - coefs[7:9]) < 1e-3))
-  expect_true(all(abs(rPValue - coefs[10:12]) < 1e-3))
+
+  expect_true(all(abs(rCoefs - coefs) < 1e-4))
   expect_true(all(
-    rownames(stats$Coefficients) ==
+    rownames(stats$coefficients) ==
     c("(Intercept)", "Sepal_Length", "Sepal_Width")))
 })
 

From 18350a57004eb87cafa9504ff73affab4b818e06 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 10 Nov 2015 11:36:43 -0800
Subject: [PATCH 602/896] [SPARK-11618][ML] Minor refactoring of basic ML
 import/export

Refactoring
* separated overwrite and param save logic in DefaultParamsWriter
* added sparkVersion to DefaultParamsWriter

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9587 from jkbradley/logreg-io.
---
 .../org/apache/spark/ml/util/ReadWrite.scala  | 57 ++++++++++---------
 1 file changed, 30 insertions(+), 27 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index ea790e0dddc7..cbdf913ba8df 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -51,6 +51,9 @@ private[util] sealed trait BaseReadWrite {
   protected final def sqlContext: SQLContext = optionSQLContext.getOrElse {
     SQLContext.getOrCreate(SparkContext.getOrCreate())
   }
+
+  /** Returns the [[SparkContext]] underlying [[sqlContext]] */
+  protected final def sc: SparkContext = sqlContext.sparkContext
 }
 
 /**
@@ -58,7 +61,7 @@ private[util] sealed trait BaseReadWrite {
  */
 @Experimental
 @Since("1.6.0")
-abstract class Writer extends BaseReadWrite {
+abstract class Writer extends BaseReadWrite with Logging {
 
   protected var shouldOverwrite: Boolean = false
 
@@ -67,7 +70,29 @@ abstract class Writer extends BaseReadWrite {
    */
   @Since("1.6.0")
   @throws[IOException]("If the input path already exists but overwrite is not enabled.")
-  def save(path: String): Unit
+  def save(path: String): Unit = {
+    val hadoopConf = sc.hadoopConfiguration
+    val fs = FileSystem.get(hadoopConf)
+    val p = new Path(path)
+    if (fs.exists(p)) {
+      if (shouldOverwrite) {
+        logInfo(s"Path $path already exists. It will be overwritten.")
+        // TODO: Revert back to the original content if save is not successful.
+        fs.delete(p, true)
+      } else {
+        throw new IOException(
+          s"Path $path already exists. Please use write.overwrite().save(path) to overwrite it.")
+      }
+    }
+    saveImpl(path)
+  }
+
+  /**
+   * [[save()]] handles overwriting and then calls this method.  Subclasses should override this
+   * method to implement the actual saving of the instance.
+   */
+  @Since("1.6.0")
+  protected def saveImpl(path: String): Unit
 
   /**
    * Overwrites if the output path already exists.
@@ -147,28 +172,9 @@ trait Readable[T] {
  * data (e.g., models with coefficients).
  * @param instance object to save
  */
-private[ml] class DefaultParamsWriter(instance: Params) extends Writer with Logging {
-
-  /**
-   * Saves the ML component to the input path.
-   */
-  override def save(path: String): Unit = {
-    val sc = sqlContext.sparkContext
-
-    val hadoopConf = sc.hadoopConfiguration
-    val fs = FileSystem.get(hadoopConf)
-    val p = new Path(path)
-    if (fs.exists(p)) {
-      if (shouldOverwrite) {
-        logInfo(s"Path $path already exists. It will be overwritten.")
-        // TODO: Revert back to the original content if save is not successful.
-        fs.delete(p, true)
-      } else {
-        throw new IOException(
-          s"Path $path already exists. Please use write.overwrite().save(path) to overwrite it.")
-      }
-    }
+private[ml] class DefaultParamsWriter(instance: Params) extends Writer {
 
+  override protected def saveImpl(path: String): Unit = {
     val uid = instance.uid
     val cls = instance.getClass.getName
     val params = instance.extractParamMap().toSeq.asInstanceOf[Seq[ParamPair[Any]]]
@@ -177,6 +183,7 @@ private[ml] class DefaultParamsWriter(instance: Params) extends Writer with Logg
     }.toList
     val metadata = ("class" -> cls) ~
       ("timestamp" -> System.currentTimeMillis()) ~
+      ("sparkVersion" -> sc.version) ~
       ("uid" -> uid) ~
       ("paramMap" -> jsonParams)
     val metadataPath = new Path(path, "metadata").toString
@@ -193,12 +200,8 @@ private[ml] class DefaultParamsWriter(instance: Params) extends Writer with Logg
  */
 private[ml] class DefaultParamsReader[T] extends Reader[T] {
 
-  /**
-   * Loads the ML component from the input path.
-   */
   override def load(path: String): T = {
     implicit val format = DefaultFormats
-    val sc = sqlContext.sparkContext
     val metadataPath = new Path(path, "metadata").toString
     val metadataStr = sc.textFile(metadataPath, 1).first()
     val metadata = parse(metadataStr)

From dba1a62cf1baa9ae1ee665d592e01dfad78331a2 Mon Sep 17 00:00:00 2001
From: unknown <ulanov@ULANOV3.americas.hpqcorp.net>
Date: Tue, 10 Nov 2015 14:25:06 -0800
Subject: [PATCH 603/896] [SPARK-7316][MLLIB] RDD sliding window with step

Implementation of step capability for sliding window function in MLlib's RDD.

Though one can use current sliding window with step 1 and then filter every Nth window, it will take more time and space (N*data.count times more than needed). For example, below are the results for various windows and steps on 10M data points:

Window | Step | Time | Windows produced
------------ | ------------- | ---------- | ----------
128 | 1 |  6.38 | 9999873
128 | 10 | 0.9 | 999988
128 | 100 | 0.41 | 99999
1024 | 1 | 44.67 | 9998977
1024 | 10 | 4.74 | 999898
1024 | 100 | 0.78 | 99990
```
import org.apache.spark.mllib.rdd.RDDFunctions._
val rdd = sc.parallelize(1 to 10000000, 10)
rdd.count
val window = 1024
val step = 1
val t = System.nanoTime(); val windows = rdd.sliding(window, step); println(windows.count); println((System.nanoTime() - t) / 1e9)
```

Author: unknown <ulanov@ULANOV3.americas.hpqcorp.net>
Author: Alexander Ulanov <nashb@yandex.ru>
Author: Xiangrui Meng <meng@databricks.com>

Closes #5855 from avulanov/SPARK-7316-sliding.
---
 .../apache/spark/mllib/rdd/RDDFunctions.scala | 11 ++-
 .../apache/spark/mllib/rdd/SlidingRDD.scala   | 71 ++++++++++---------
 .../spark/mllib/rdd/RDDFunctionsSuite.scala   | 11 +--
 3 files changed, 54 insertions(+), 39 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/rdd/RDDFunctions.scala b/mllib/src/main/scala/org/apache/spark/mllib/rdd/RDDFunctions.scala
index 78172843be56..19a047ded257 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/rdd/RDDFunctions.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/rdd/RDDFunctions.scala
@@ -37,15 +37,20 @@ class RDDFunctions[T: ClassTag](self: RDD[T]) extends Serializable {
    * trigger a Spark job if the parent RDD has more than one partitions and the window size is
    * greater than 1.
    */
-  def sliding(windowSize: Int): RDD[Array[T]] = {
+  def sliding(windowSize: Int, step: Int): RDD[Array[T]] = {
     require(windowSize > 0, s"Sliding window size must be positive, but got $windowSize.")
-    if (windowSize == 1) {
+    if (windowSize == 1 && step == 1) {
       self.map(Array(_))
     } else {
-      new SlidingRDD[T](self, windowSize)
+      new SlidingRDD[T](self, windowSize, step)
     }
   }
 
+  /**
+   * [[sliding(Int, Int)*]] with step = 1.
+   */
+  def sliding(windowSize: Int): RDD[Array[T]] = sliding(windowSize, 1)
+
   /**
    * Reduces the elements of this RDD in a multi-level tree pattern.
    *
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala b/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
index 1facf83d806d..ead8db634499 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/rdd/SlidingRDD.scala
@@ -24,13 +24,13 @@ import org.apache.spark.{TaskContext, Partition}
 import org.apache.spark.rdd.RDD
 
 private[mllib]
-class SlidingRDDPartition[T](val idx: Int, val prev: Partition, val tail: Seq[T])
+class SlidingRDDPartition[T](val idx: Int, val prev: Partition, val tail: Seq[T], val offset: Int)
   extends Partition with Serializable {
   override val index: Int = idx
 }
 
 /**
- * Represents a RDD from grouping items of its parent RDD in fixed size blocks by passing a sliding
+ * Represents an RDD from grouping items of its parent RDD in fixed size blocks by passing a sliding
  * window over them. The ordering is first based on the partition index and then the ordering of
  * items within each partition. This is similar to sliding in Scala collections, except that it
  * becomes an empty RDD if the window size is greater than the total number of items. It needs to
@@ -40,19 +40,24 @@ class SlidingRDDPartition[T](val idx: Int, val prev: Partition, val tail: Seq[T]
  *
  * @param parent the parent RDD
  * @param windowSize the window size, must be greater than 1
+ * @param step step size for windows
  *
- * @see [[org.apache.spark.mllib.rdd.RDDFunctions#sliding]]
+ * @see [[org.apache.spark.mllib.rdd.RDDFunctions.sliding(Int, Int)*]]
+ * @see [[scala.collection.IterableLike.sliding(Int, Int)*]]
  */
 private[mllib]
-class SlidingRDD[T: ClassTag](@transient val parent: RDD[T], val windowSize: Int)
+class SlidingRDD[T: ClassTag](@transient val parent: RDD[T], val windowSize: Int, val step: Int)
   extends RDD[Array[T]](parent) {
 
-  require(windowSize > 1, s"Window size must be greater than 1, but got $windowSize.")
+  require(windowSize > 0 && step > 0 && !(windowSize == 1 && step == 1),
+    "Window size and step must be greater than 0, " +
+      s"and they cannot be both 1, but got windowSize = $windowSize and step = $step.")
 
   override def compute(split: Partition, context: TaskContext): Iterator[Array[T]] = {
     val part = split.asInstanceOf[SlidingRDDPartition[T]]
     (firstParent[T].iterator(part.prev, context) ++ part.tail)
-      .sliding(windowSize)
+      .drop(part.offset)
+      .sliding(windowSize, step)
       .withPartial(false)
       .map(_.toArray)
   }
@@ -62,40 +67,42 @@ class SlidingRDD[T: ClassTag](@transient val parent: RDD[T], val windowSize: Int
 
   override def getPartitions: Array[Partition] = {
     val parentPartitions = parent.partitions
-    val n = parentPartitions.size
+    val n = parentPartitions.length
     if (n == 0) {
       Array.empty
     } else if (n == 1) {
-      Array(new SlidingRDDPartition[T](0, parentPartitions(0), Seq.empty))
+      Array(new SlidingRDDPartition[T](0, parentPartitions(0), Seq.empty, 0))
     } else {
-      val n1 = n - 1
       val w1 = windowSize - 1
-      // Get the first w1 items of each partition, starting from the second partition.
-      val nextHeads =
-        parent.context.runJob(parent, (iter: Iterator[T]) => iter.take(w1).toArray, 1 until n)
-      val partitions = mutable.ArrayBuffer[SlidingRDDPartition[T]]()
+      // Get partition sizes and first w1 elements.
+      val (sizes, heads) = parent.mapPartitions { iter =>
+        val w1Array = iter.take(w1).toArray
+        Iterator.single((w1Array.length + iter.length, w1Array))
+      }.collect().unzip
+      val partitions = mutable.ArrayBuffer.empty[SlidingRDDPartition[T]]
       var i = 0
+      var cumSize = 0
       var partitionIndex = 0
-      while (i < n1) {
-        var j = i
-        val tail = mutable.ListBuffer[T]()
-        // Keep appending to the current tail until appended a head of size w1.
-        while (j < n1 && nextHeads(j).size < w1) {
-          tail ++= nextHeads(j)
-          j += 1
+      while (i < n) {
+        val mod = cumSize % step
+        val offset = if (mod == 0) 0 else step - mod
+        val size = sizes(i)
+        if (offset < size) {
+          val tail = mutable.ListBuffer.empty[T]
+          // Keep appending to the current tail until it has w1 elements.
+          var j = i + 1
+          while (j < n && tail.length < w1) {
+            tail ++= heads(j).take(w1 - tail.length)
+            j += 1
+          }
+          if (sizes(i) + tail.length >= offset + windowSize) {
+            partitions +=
+              new SlidingRDDPartition[T](partitionIndex, parentPartitions(i), tail, offset)
+            partitionIndex += 1
+          }
         }
-        if (j < n1) {
-          tail ++= nextHeads(j)
-          j += 1
-        }
-        partitions += new SlidingRDDPartition[T](partitionIndex, parentPartitions(i), tail)
-        partitionIndex += 1
-        // Skip appended heads.
-        i = j
-      }
-      // If the head of last partition has size w1, we also need to add this partition.
-      if (nextHeads.last.size == w1) {
-        partitions += new SlidingRDDPartition[T](partitionIndex, parentPartitions(n1), Seq.empty)
+        cumSize += size
+        i += 1
       }
       partitions.toArray
     }
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/rdd/RDDFunctionsSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/rdd/RDDFunctionsSuite.scala
index bc6417261483..ac93733bab5f 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/rdd/RDDFunctionsSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/rdd/RDDFunctionsSuite.scala
@@ -28,9 +28,12 @@ class RDDFunctionsSuite extends SparkFunSuite with MLlibTestSparkContext {
     for (numPartitions <- 1 to 8) {
       val rdd = sc.parallelize(data, numPartitions)
       for (windowSize <- 1 to 6) {
-        val sliding = rdd.sliding(windowSize).collect().map(_.toList).toList
-        val expected = data.sliding(windowSize).map(_.toList).toList
-        assert(sliding === expected)
+        for (step <- 1 to 3) {
+          val sliding = rdd.sliding(windowSize, step).collect().map(_.toList).toList
+          val expected = data.sliding(windowSize, step)
+            .map(_.toList).toList.filter(l => l.size == windowSize)
+          assert(sliding === expected)
+        }
       }
       assert(rdd.sliding(7).collect().isEmpty,
         "Should return an empty RDD if the window size is greater than the number of items.")
@@ -40,7 +43,7 @@ class RDDFunctionsSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("sliding with empty partitions") {
     val data = Seq(Seq(1, 2, 3), Seq.empty[Int], Seq(4), Seq.empty[Int], Seq(5, 6, 7))
     val rdd = sc.parallelize(data, data.length).flatMap(s => s)
-    assert(rdd.partitions.size === data.length)
+    assert(rdd.partitions.length === data.length)
     val sliding = rdd.sliding(3).collect().toSeq.map(_.toSeq)
     val expected = data.flatMap(x => x).sliding(3).toSeq.map(_.toSeq)
     assert(sliding === expected)

From 724cf7a38c551bf2a79b87a8158bbe1725f9f888 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Tue, 10 Nov 2015 14:30:19 -0800
Subject: [PATCH 604/896] [SPARK-11616][SQL] Improve toString for Dataset

Author: Michael Armbrust <michael@databricks.com>

Closes #9586 from marmbrus/dataset-toString.
---
 .../org/apache/spark/sql/DataFrame.scala      | 14 ++-----
 .../scala/org/apache/spark/sql/Dataset.scala  |  4 +-
 .../spark/sql/execution/Queryable.scala       | 37 +++++++++++++++++++
 .../org/apache/spark/sql/DatasetSuite.scala   |  5 +++
 4 files changed, 47 insertions(+), 13 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 9368435a63c3..691b476fff8d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -39,7 +39,7 @@ import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
-import org.apache.spark.sql.execution.{EvaluatePython, ExplainCommand, FileRelation, LogicalRDD, QueryExecution, SQLExecution}
+import org.apache.spark.sql.execution.{EvaluatePython, ExplainCommand, FileRelation, LogicalRDD, QueryExecution, Queryable, SQLExecution}
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation}
 import org.apache.spark.sql.execution.datasources.json.JacksonGenerator
 import org.apache.spark.sql.sources.HadoopFsRelation
@@ -116,7 +116,8 @@ private[sql] object DataFrame {
 @Experimental
 class DataFrame private[sql](
     @transient val sqlContext: SQLContext,
-    @DeveloperApi @transient val queryExecution: QueryExecution) extends Serializable {
+    @DeveloperApi @transient val queryExecution: QueryExecution)
+  extends Queryable with Serializable {
 
   // Note for Spark contributors: if adding or updating any action in `DataFrame`, please make sure
   // you wrap it with `withNewExecutionId` if this actions doesn't call other action.
@@ -234,15 +235,6 @@ class DataFrame private[sql](
     sb.toString()
   }
 
-  override def toString: String = {
-    try {
-      schema.map(f => s"${f.name}: ${f.dataType.simpleString}").mkString("[", ", ", "]")
-    } catch {
-      case NonFatal(e) =>
-        s"Invalid tree; ${e.getMessage}:\n$queryExecution"
-    }
-  }
-
   /**
    * Returns the object itself.
    * @group basic
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 6d2968e2881f..a7e5ab19bf84 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -28,7 +28,7 @@ import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.execution.QueryExecution
+import org.apache.spark.sql.execution.{Queryable, QueryExecution}
 import org.apache.spark.sql.types.StructType
 
 /**
@@ -62,7 +62,7 @@ import org.apache.spark.sql.types.StructType
 class Dataset[T] private[sql](
     @transient val sqlContext: SQLContext,
     @transient val queryExecution: QueryExecution,
-    unresolvedEncoder: Encoder[T]) extends Serializable {
+    unresolvedEncoder: Encoder[T]) extends Queryable with Serializable {
 
   /** The encoder for this [[Dataset]] that has been resolved to its output schema. */
   private[sql] implicit val encoder: ExpressionEncoder[T] = unresolvedEncoder match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
new file mode 100644
index 000000000000..9ca383896a09
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.sql.types.StructType
+
+import scala.util.control.NonFatal
+
+/** A trait that holds shared code between DataFrames and Datasets. */
+private[sql] trait Queryable {
+  def schema: StructType
+  def queryExecution: QueryExecution
+
+  override def toString: String = {
+    try {
+      schema.map(f => s"${f.name}: ${f.dataType.simpleString}").mkString("[", ", ", "]")
+    } catch {
+      case NonFatal(e) =>
+        s"Invalid tree; ${e.getMessage}:\n$queryExecution"
+    }
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index aea5a700d020..621148528714 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -313,4 +313,9 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     val joined = ds1.joinWith(ds2, $"a.value" === $"b.value")
     checkAnswer(joined, ("2", 2))
   }
+
+  test("toString") {
+    val ds = Seq((1, 2)).toDS()
+    assert(ds.toString == "[_1: int, _2: int]")
+  }
 }

From 638c51d9380081b3b8182be2c2460bd53b8b0a4f Mon Sep 17 00:00:00 2001
From: Pravin Gadakh <pravingadakh177@gmail.com>
Date: Tue, 10 Nov 2015 14:47:04 -0800
Subject: [PATCH 605/896] [SPARK-11550][DOCS] Replace example code in
 mllib-optimization.md using include_example

Author: Pravin Gadakh <pravingadakh177@gmail.com>

Closes #9516 from pravingadakh/SPARK-11550.
---
 docs/mllib-optimization.md                    | 145 +-----------------
 .../examples/mllib/JavaLBFGSExample.java      | 108 +++++++++++++
 .../spark/examples/mllib/LBFGSExample.scala   |  90 +++++++++++
 3 files changed, 200 insertions(+), 143 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaLBFGSExample.java
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/LBFGSExample.scala

diff --git a/docs/mllib-optimization.md b/docs/mllib-optimization.md
index a3bd130ba077..ad7bcd9bfd40 100644
--- a/docs/mllib-optimization.md
+++ b/docs/mllib-optimization.md
@@ -220,154 +220,13 @@ L-BFGS optimizer.
 <div data-lang="scala" markdown="1">
 Refer to the [`LBFGS` Scala docs](api/scala/index.html#org.apache.spark.mllib.optimization.LBFGS) and [`SquaredL2Updater` Scala docs](api/scala/index.html#org.apache.spark.mllib.optimization.SquaredL2Updater) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.SparkContext
-import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
-import org.apache.spark.mllib.linalg.Vectors
-import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.mllib.classification.LogisticRegressionModel
-import org.apache.spark.mllib.optimization.{LBFGS, LogisticGradient, SquaredL2Updater}
-
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-val numFeatures = data.take(1)(0).features.size
-
-// Split data into training (60%) and test (40%).
-val splits = data.randomSplit(Array(0.6, 0.4), seed = 11L)
-
-// Append 1 into the training data as intercept.
-val training = splits(0).map(x => (x.label, MLUtils.appendBias(x.features))).cache()
-
-val test = splits(1)
-
-// Run training algorithm to build the model
-val numCorrections = 10
-val convergenceTol = 1e-4
-val maxNumIterations = 20
-val regParam = 0.1
-val initialWeightsWithIntercept = Vectors.dense(new Array[Double](numFeatures + 1))
-
-val (weightsWithIntercept, loss) = LBFGS.runLBFGS(
-  training,
-  new LogisticGradient(),
-  new SquaredL2Updater(),
-  numCorrections,
-  convergenceTol,
-  maxNumIterations,
-  regParam,
-  initialWeightsWithIntercept)
-
-val model = new LogisticRegressionModel(
-  Vectors.dense(weightsWithIntercept.toArray.slice(0, weightsWithIntercept.size - 1)),
-  weightsWithIntercept(weightsWithIntercept.size - 1))
-
-// Clear the default threshold.
-model.clearThreshold()
-
-// Compute raw scores on the test set.
-val scoreAndLabels = test.map { point =>
-  val score = model.predict(point.features)
-  (score, point.label)
-}
-
-// Get evaluation metrics.
-val metrics = new BinaryClassificationMetrics(scoreAndLabels)
-val auROC = metrics.areaUnderROC()
-
-println("Loss of each step in training process")
-loss.foreach(println)
-println("Area under ROC = " + auROC)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/LBFGSExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`LBFGS` Java docs](api/java/org/apache/spark/mllib/optimization/LBFGS.html) and [`SquaredL2Updater` Java docs](api/java/org/apache/spark/mllib/optimization/SquaredL2Updater.html) for details on the API.
 
-{% highlight java %}
-import java.util.Arrays;
-import java.util.Random;
-
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.mllib.classification.LogisticRegressionModel;
-import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics;
-import org.apache.spark.mllib.linalg.Vector;
-import org.apache.spark.mllib.linalg.Vectors;
-import org.apache.spark.mllib.optimization.*;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.SparkConf;
-import org.apache.spark.SparkContext;
-
-public class LBFGSExample {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("L-BFGS Example");
-    SparkContext sc = new SparkContext(conf);
-    String path = "data/mllib/sample_libsvm_data.txt";
-    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
-    int numFeatures = data.take(1).get(0).features().size();
-    
-    // Split initial RDD into two... [60% training data, 40% testing data].
-    JavaRDD<LabeledPoint> trainingInit = data.sample(false, 0.6, 11L);
-    JavaRDD<LabeledPoint> test = data.subtract(trainingInit);
-    
-    // Append 1 into the training data as intercept.
-    JavaRDD<Tuple2<Object, Vector>> training = data.map(
-      new Function<LabeledPoint, Tuple2<Object, Vector>>() {
-        public Tuple2<Object, Vector> call(LabeledPoint p) {
-          return new Tuple2<Object, Vector>(p.label(), MLUtils.appendBias(p.features()));
-        }
-      });
-    training.cache();
-
-    // Run training algorithm to build the model.
-    int numCorrections = 10;
-    double convergenceTol = 1e-4;
-    int maxNumIterations = 20;
-    double regParam = 0.1;
-    Vector initialWeightsWithIntercept = Vectors.dense(new double[numFeatures + 1]);
-
-    Tuple2<Vector, double[]> result = LBFGS.runLBFGS(
-      training.rdd(),
-      new LogisticGradient(),
-      new SquaredL2Updater(),
-      numCorrections,
-      convergenceTol,
-      maxNumIterations,
-      regParam,
-      initialWeightsWithIntercept);
-    Vector weightsWithIntercept = result._1();
-    double[] loss = result._2();
-
-    final LogisticRegressionModel model = new LogisticRegressionModel(
-      Vectors.dense(Arrays.copyOf(weightsWithIntercept.toArray(), weightsWithIntercept.size() - 1)),
-      (weightsWithIntercept.toArray())[weightsWithIntercept.size() - 1]);
-
-    // Clear the default threshold.
-    model.clearThreshold();
-
-    // Compute raw scores on the test set.
-    JavaRDD<Tuple2<Object, Object>> scoreAndLabels = test.map(
-      new Function<LabeledPoint, Tuple2<Object, Object>>() {
-      public Tuple2<Object, Object> call(LabeledPoint p) {
-        Double score = model.predict(p.features());
-        return new Tuple2<Object, Object>(score, p.label());
-      }
-    });
-
-    // Get evaluation metrics.
-    BinaryClassificationMetrics metrics = 
-      new BinaryClassificationMetrics(scoreAndLabels.rdd());
-    double auROC = metrics.areaUnderROC();
-     
-    System.out.println("Loss of each step in training process");
-    for (double l : loss)
-      System.out.println(l);
-    System.out.println("Area under ROC = " + auROC);
-  }
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaLBFGSExample.java %}
 </div>
 </div>
 
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaLBFGSExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaLBFGSExample.java
new file mode 100644
index 000000000000..355883f61bd6
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaLBFGSExample.java
@@ -0,0 +1,108 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.Arrays;
+
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.classification.LogisticRegressionModel;
+import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics;
+import org.apache.spark.mllib.linalg.Vector;
+import org.apache.spark.mllib.linalg.Vectors;
+import org.apache.spark.mllib.optimization.*;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.SparkConf;
+import org.apache.spark.SparkContext;
+// $example off$
+
+public class JavaLBFGSExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("L-BFGS Example");
+    SparkContext sc = new SparkContext(conf);
+
+    // $example on$
+    String path = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
+    int numFeatures = data.take(1).get(0).features().size();
+
+    // Split initial RDD into two... [60% training data, 40% testing data].
+    JavaRDD<LabeledPoint> trainingInit = data.sample(false, 0.6, 11L);
+    JavaRDD<LabeledPoint> test = data.subtract(trainingInit);
+
+    // Append 1 into the training data as intercept.
+    JavaRDD<Tuple2<Object, Vector>> training = data.map(
+      new Function<LabeledPoint, Tuple2<Object, Vector>>() {
+        public Tuple2<Object, Vector> call(LabeledPoint p) {
+          return new Tuple2<Object, Vector>(p.label(), MLUtils.appendBias(p.features()));
+        }
+      });
+    training.cache();
+
+    // Run training algorithm to build the model.
+    int numCorrections = 10;
+    double convergenceTol = 1e-4;
+    int maxNumIterations = 20;
+    double regParam = 0.1;
+    Vector initialWeightsWithIntercept = Vectors.dense(new double[numFeatures + 1]);
+
+    Tuple2<Vector, double[]> result = LBFGS.runLBFGS(
+      training.rdd(),
+      new LogisticGradient(),
+      new SquaredL2Updater(),
+      numCorrections,
+      convergenceTol,
+      maxNumIterations,
+      regParam,
+      initialWeightsWithIntercept);
+    Vector weightsWithIntercept = result._1();
+    double[] loss = result._2();
+
+    final LogisticRegressionModel model = new LogisticRegressionModel(
+      Vectors.dense(Arrays.copyOf(weightsWithIntercept.toArray(), weightsWithIntercept.size() - 1)),
+      (weightsWithIntercept.toArray())[weightsWithIntercept.size() - 1]);
+
+    // Clear the default threshold.
+    model.clearThreshold();
+
+    // Compute raw scores on the test set.
+    JavaRDD<Tuple2<Object, Object>> scoreAndLabels = test.map(
+      new Function<LabeledPoint, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(LabeledPoint p) {
+          Double score = model.predict(p.features());
+          return new Tuple2<Object, Object>(score, p.label());
+        }
+      });
+
+    // Get evaluation metrics.
+    BinaryClassificationMetrics metrics =
+      new BinaryClassificationMetrics(scoreAndLabels.rdd());
+    double auROC = metrics.areaUnderROC();
+
+    System.out.println("Loss of each step in training process");
+    for (double l : loss)
+      System.out.println(l);
+    System.out.println("Area under ROC = " + auROC);
+    // $example off$
+  }
+}
+
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/LBFGSExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/LBFGSExample.scala
new file mode 100644
index 000000000000..61d2e7715f53
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/LBFGSExample.scala
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.classification.LogisticRegressionModel
+import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
+import org.apache.spark.mllib.linalg.Vectors
+import org.apache.spark.mllib.optimization.{LBFGS, LogisticGradient, SquaredL2Updater}
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+import org.apache.spark.{SparkConf, SparkContext}
+
+object LBFGSExample {
+
+  def main(args: Array[String]): Unit = {
+
+    val conf = new SparkConf().setAppName("LBFGSExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    val numFeatures = data.take(1)(0).features.size
+
+    // Split data into training (60%) and test (40%).
+    val splits = data.randomSplit(Array(0.6, 0.4), seed = 11L)
+
+    // Append 1 into the training data as intercept.
+    val training = splits(0).map(x => (x.label, MLUtils.appendBias(x.features))).cache()
+
+    val test = splits(1)
+
+    // Run training algorithm to build the model
+    val numCorrections = 10
+    val convergenceTol = 1e-4
+    val maxNumIterations = 20
+    val regParam = 0.1
+    val initialWeightsWithIntercept = Vectors.dense(new Array[Double](numFeatures + 1))
+
+    val (weightsWithIntercept, loss) = LBFGS.runLBFGS(
+      training,
+      new LogisticGradient(),
+      new SquaredL2Updater(),
+      numCorrections,
+      convergenceTol,
+      maxNumIterations,
+      regParam,
+      initialWeightsWithIntercept)
+
+    val model = new LogisticRegressionModel(
+      Vectors.dense(weightsWithIntercept.toArray.slice(0, weightsWithIntercept.size - 1)),
+      weightsWithIntercept(weightsWithIntercept.size - 1))
+
+    // Clear the default threshold.
+    model.clearThreshold()
+
+    // Compute raw scores on the test set.
+    val scoreAndLabels = test.map { point =>
+      val score = model.predict(point.features)
+      (score, point.label)
+    }
+
+    // Get evaluation metrics.
+    val metrics = new BinaryClassificationMetrics(scoreAndLabels)
+    val auROC = metrics.areaUnderROC()
+
+    println("Loss of each step in training process")
+    loss.foreach(println)
+    println("Area under ROC = " + auROC)
+    // $example off$
+  }
+}
+// scalastyle:on println

From 32790fe7249b0efe2cbc5c4ee2df0fb687dcd624 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Tue, 10 Nov 2015 15:47:10 -0800
Subject: [PATCH 606/896] [SPARK-11567] [PYTHON] Add Python API for corr
 Aggregate function

like `df.agg(corr("col1", "col2")`

davies

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9536 from felixcheung/pyfunc.
---
 python/pyspark/sql/functions.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index 6e1cbde4239f..c3da513c1389 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -255,6 +255,22 @@ def coalesce(*cols):
     return Column(jc)
 
 
+@since(1.6)
+def corr(col1, col2):
+    """Returns a new :class:`Column` for the Pearson Correlation Coefficient for ``col1``
+    and ``col2``.
+
+    >>> a = [x * x - 2 * x + 3.5 for x in range(20)]
+    >>> b = range(20)
+    >>> corrDf = sqlContext.createDataFrame(zip(a, b))
+    >>> corrDf = corrDf.agg(corr(corrDf._1, corrDf._2).alias('c'))
+    >>> corrDf.selectExpr('abs(c - 0.9572339139475857) < 1e-16 as t').collect()
+    [Row(t=True)]
+    """
+    sc = SparkContext._active_spark_context
+    return Column(sc._jvm.functions.corr(_to_java_column(col1), _to_java_column(col2)))
+
+
 @since(1.3)
 def countDistinct(col, *cols):
     """Returns a new :class:`Column` for distinct count of ``col`` or ``cols``.

From 1dde39d796bbf42336051a86bedf871c7fddd513 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 10 Nov 2015 15:58:30 -0800
Subject: [PATCH 607/896] [SPARK-9818] Re-enable Docker tests for JDBC data
 source

This patch re-enables tests for the Docker JDBC data source. These tests were reverted in #4872 due to transitive dependency conflicts introduced by the `docker-client` library. This patch should avoid those problems by using a version of `docker-client` which shades its transitive dependencies and by performing some build-magic to work around problems with that shaded JAR.

In addition, I significantly refactored the tests to simplify the setup and teardown code and to fix several Docker networking issues which caused problems when running in `boot2docker`.

Closes #8101.

Author: Josh Rosen <joshrosen@databricks.com>
Author: Yijie Shen <henry.yijieshen@gmail.com>

Closes #9503 from JoshRosen/docker-jdbc-tests.
---
 docker-integration-tests/pom.xml              | 149 ++++++++++++++++
 .../sql/jdbc/DockerJDBCIntegrationSuite.scala | 160 ++++++++++++++++++
 .../sql/jdbc/MySQLIntegrationSuite.scala      | 153 +++++++++++++++++
 .../sql/jdbc/PostgresIntegrationSuite.scala   |  82 +++++++++
 .../org/apache/spark/util/DockerUtils.scala   |  68 ++++++++
 pom.xml                                       |  14 ++
 project/SparkBuild.scala                      |  14 +-
 .../org/apache/spark/tags/DockerTest.java     |  26 +++
 8 files changed, 664 insertions(+), 2 deletions(-)
 create mode 100644 docker-integration-tests/pom.xml
 create mode 100644 docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DockerJDBCIntegrationSuite.scala
 create mode 100644 docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MySQLIntegrationSuite.scala
 create mode 100644 docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
 create mode 100644 docker-integration-tests/src/test/scala/org/apache/spark/util/DockerUtils.scala
 create mode 100644 tags/src/main/java/org/apache/spark/tags/DockerTest.java

diff --git a/docker-integration-tests/pom.xml b/docker-integration-tests/pom.xml
new file mode 100644
index 000000000000..dee0c4aa37ae
--- /dev/null
+++ b/docker-integration-tests/pom.xml
@@ -0,0 +1,149 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apache.spark</groupId>
+    <artifactId>spark-parent_2.10</artifactId>
+    <version>1.6.0-SNAPSHOT</version>
+    <relativePath>../pom.xml</relativePath>
+  </parent>
+
+  <artifactId>spark-docker-integration-tests_2.10</artifactId>
+  <packaging>jar</packaging>
+  <name>Spark Project Docker Integration Tests</name>
+  <url>http://spark.apache.org/</url>
+  <properties>
+    <sbt.project.name>docker-integration-tests</sbt.project.name>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.spotify</groupId>
+      <artifactId>docker-client</artifactId>
+      <classifier>shaded</classifier>
+      <scope>test</scope>
+      <!--
+        See https://github.com/spotify/docker-client/pull/272#issuecomment-155249101
+        for an explanation of why these exclusions are (necessarily) a mess.
+      -->
+      <exclusions>
+        <exclusion>
+          <groupId>com.fasterxml.jackson.jaxrs</groupId>
+          <artifactId>jackson-jaxrs-json-provider</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>com.fasterxml.jackson.datatype</groupId>
+          <artifactId>jackson-datatype-guava</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>com.fasterxml.jackson.core</groupId>
+          <artifactId>jackson-databind</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.glassfish.jersey.core</groupId>
+          <artifactId>jersey-client</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.glassfish.jersey.connectors</groupId>
+          <artifactId>jersey-apache-connector</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.glassfish.jersey.media</groupId>
+          <artifactId>jersey-media-json-jackson</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <!-- Necessary in order to avoid errors in log messages: -->
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>18.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-core_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-core_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-sql_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-sql_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <type>test-jar</type>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.spark</groupId>
+      <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
+      <version>${project.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <!-- Jersey dependencies, used to override version.
+     See https://github.com/apache/spark/pull/9503#issuecomment-154369560 for
+     background on why we need to use a newer Jersey only in this test module;
+     we can remove this once https://github.com/spotify/docker-client/pull/272 is
+     merged and a new docker-client release is published. -->
+    <dependency>
+      <groupId>com.sun.jersey</groupId>
+      <artifactId>jersey-server</artifactId>
+      <version>1.19</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.sun.jersey</groupId>
+      <artifactId>jersey-core</artifactId>
+      <version>1.19</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.sun.jersey</groupId>
+      <artifactId>jersey-servlet</artifactId>
+      <version>1.19</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.sun.jersey</groupId>
+      <artifactId>jersey-json</artifactId>
+      <version>1.19</version>
+      <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>stax</groupId>
+          <artifactId>stax-api</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
+    <!-- End Jersey dependencies -->
+  </dependencies>
+</project>
diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DockerJDBCIntegrationSuite.scala b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DockerJDBCIntegrationSuite.scala
new file mode 100644
index 000000000000..c503c4a13b48
--- /dev/null
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/DockerJDBCIntegrationSuite.scala
@@ -0,0 +1,160 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.net.ServerSocket
+import java.sql.Connection
+
+import scala.collection.JavaConverters._
+import scala.util.control.NonFatal
+
+import com.spotify.docker.client._
+import com.spotify.docker.client.messages.{ContainerConfig, HostConfig, PortBinding}
+import org.scalatest.BeforeAndAfterAll
+import org.scalatest.concurrent.Eventually
+import org.scalatest.time.SpanSugar._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.util.DockerUtils
+import org.apache.spark.sql.test.SharedSQLContext
+
+abstract class DatabaseOnDocker {
+  /**
+   * The docker image to be pulled.
+   */
+  val imageName: String
+
+  /**
+   * Environment variables to set inside of the Docker container while launching it.
+   */
+  val env: Map[String, String]
+
+  /**
+   * The container-internal JDBC port that the database listens on.
+   */
+  val jdbcPort: Int
+
+  /**
+   * Return a JDBC URL that connects to the database running at the given IP address and port.
+   */
+  def getJdbcUrl(ip: String, port: Int): String
+}
+
+abstract class DockerJDBCIntegrationSuite
+  extends SparkFunSuite
+  with BeforeAndAfterAll
+  with Eventually
+  with SharedSQLContext {
+
+  val db: DatabaseOnDocker
+
+  private var docker: DockerClient = _
+  private var containerId: String = _
+  protected var jdbcUrl: String = _
+
+  override def beforeAll() {
+    super.beforeAll()
+    try {
+      docker = DefaultDockerClient.fromEnv.build()
+      // Check that Docker is actually up
+      try {
+        docker.ping()
+      } catch {
+        case NonFatal(e) =>
+          log.error("Exception while connecting to Docker. Check whether Docker is running.")
+          throw e
+      }
+      // Ensure that the Docker image is installed:
+      try {
+        docker.inspectImage(db.imageName)
+      } catch {
+        case e: ImageNotFoundException =>
+          log.warn(s"Docker image ${db.imageName} not found; pulling image from registry")
+          docker.pull(db.imageName)
+      }
+      // Configure networking (necessary for boot2docker / Docker Machine)
+      val externalPort: Int = {
+        val sock = new ServerSocket(0)
+        val port = sock.getLocalPort
+        sock.close()
+        port
+      }
+      val dockerIp = DockerUtils.getDockerIp()
+      val hostConfig: HostConfig = HostConfig.builder()
+        .networkMode("bridge")
+        .portBindings(
+          Map(s"${db.jdbcPort}/tcp" -> List(PortBinding.of(dockerIp, externalPort)).asJava).asJava)
+        .build()
+      // Create the database container:
+      val config = ContainerConfig.builder()
+        .image(db.imageName)
+        .networkDisabled(false)
+        .env(db.env.map { case (k, v) => s"$k=$v" }.toSeq.asJava)
+        .hostConfig(hostConfig)
+        .exposedPorts(s"${db.jdbcPort}/tcp")
+        .build()
+      containerId = docker.createContainer(config).id
+      // Start the container and wait until the database can accept JDBC connections:
+      docker.startContainer(containerId)
+      jdbcUrl = db.getJdbcUrl(dockerIp, externalPort)
+      eventually(timeout(60.seconds), interval(1.seconds)) {
+        val conn = java.sql.DriverManager.getConnection(jdbcUrl)
+        conn.close()
+      }
+      // Run any setup queries:
+      val conn: Connection = java.sql.DriverManager.getConnection(jdbcUrl)
+      try {
+        dataPreparation(conn)
+      } finally {
+        conn.close()
+      }
+    } catch {
+      case NonFatal(e) =>
+        try {
+          afterAll()
+        } finally {
+          throw e
+        }
+    }
+  }
+
+  override def afterAll() {
+    try {
+      if (docker != null) {
+        try {
+          if (containerId != null) {
+            docker.killContainer(containerId)
+            docker.removeContainer(containerId)
+          }
+        } catch {
+          case NonFatal(e) =>
+            logWarning(s"Could not stop container $containerId", e)
+        } finally {
+          docker.close()
+        }
+      }
+    } finally {
+      super.afterAll()
+    }
+  }
+
+  /**
+   * Prepare databases and tables for testing.
+   */
+  def dataPreparation(connection: Connection): Unit
+}
diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MySQLIntegrationSuite.scala b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MySQLIntegrationSuite.scala
new file mode 100644
index 000000000000..c68e4dc4933b
--- /dev/null
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/MySQLIntegrationSuite.scala
@@ -0,0 +1,153 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.math.BigDecimal
+import java.sql.{Connection, Date, Timestamp}
+import java.util.Properties
+
+import org.apache.spark.tags.DockerTest
+
+@DockerTest
+class MySQLIntegrationSuite extends DockerJDBCIntegrationSuite {
+  override val db = new DatabaseOnDocker {
+    override val imageName = "mysql:5.7.9"
+    override val env = Map(
+      "MYSQL_ROOT_PASSWORD" -> "rootpass"
+    )
+    override val jdbcPort: Int = 3306
+    override def getJdbcUrl(ip: String, port: Int): String =
+      s"jdbc:mysql://$ip:$port/mysql?user=root&password=rootpass"
+  }
+
+  override def dataPreparation(conn: Connection): Unit = {
+    conn.prepareStatement("CREATE DATABASE foo").executeUpdate()
+    conn.prepareStatement("CREATE TABLE tbl (x INTEGER, y TEXT(8))").executeUpdate()
+    conn.prepareStatement("INSERT INTO tbl VALUES (42,'fred')").executeUpdate()
+    conn.prepareStatement("INSERT INTO tbl VALUES (17,'dave')").executeUpdate()
+
+    conn.prepareStatement("CREATE TABLE numbers (onebit BIT(1), tenbits BIT(10), "
+      + "small SMALLINT, med MEDIUMINT, nor INT, big BIGINT, deci DECIMAL(40,20), flt FLOAT, "
+      + "dbl DOUBLE)").executeUpdate()
+    conn.prepareStatement("INSERT INTO numbers VALUES (b'0', b'1000100101', "
+      + "17, 77777, 123456789, 123456789012345, 123456789012345.123456789012345, "
+      + "42.75, 1.0000000000000002)").executeUpdate()
+
+    conn.prepareStatement("CREATE TABLE dates (d DATE, t TIME, dt DATETIME, ts TIMESTAMP, "
+      + "yr YEAR)").executeUpdate()
+    conn.prepareStatement("INSERT INTO dates VALUES ('1991-11-09', '13:31:24', "
+      + "'1996-01-01 01:23:45', '2009-02-13 23:31:30', '2001')").executeUpdate()
+
+    // TODO: Test locale conversion for strings.
+    conn.prepareStatement("CREATE TABLE strings (a CHAR(10), b VARCHAR(10), c TINYTEXT, "
+      + "d TEXT, e MEDIUMTEXT, f LONGTEXT, g BINARY(4), h VARBINARY(10), i BLOB)"
+    ).executeUpdate()
+    conn.prepareStatement("INSERT INTO strings VALUES ('the', 'quick', 'brown', 'fox', " +
+      "'jumps', 'over', 'the', 'lazy', 'dog')").executeUpdate()
+  }
+
+  test("Basic test") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "tbl", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 2)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 2)
+    assert(types(0).equals("class java.lang.Integer"))
+    assert(types(1).equals("class java.lang.String"))
+  }
+
+  test("Numeric types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "numbers", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 9)
+    assert(types(0).equals("class java.lang.Boolean"))
+    assert(types(1).equals("class java.lang.Long"))
+    assert(types(2).equals("class java.lang.Integer"))
+    assert(types(3).equals("class java.lang.Integer"))
+    assert(types(4).equals("class java.lang.Integer"))
+    assert(types(5).equals("class java.lang.Long"))
+    assert(types(6).equals("class java.math.BigDecimal"))
+    assert(types(7).equals("class java.lang.Double"))
+    assert(types(8).equals("class java.lang.Double"))
+    assert(rows(0).getBoolean(0) == false)
+    assert(rows(0).getLong(1) == 0x225)
+    assert(rows(0).getInt(2) == 17)
+    assert(rows(0).getInt(3) == 77777)
+    assert(rows(0).getInt(4) == 123456789)
+    assert(rows(0).getLong(5) == 123456789012345L)
+    val bd = new BigDecimal("123456789012345.12345678901234500000")
+    assert(rows(0).getAs[BigDecimal](6).equals(bd))
+    assert(rows(0).getDouble(7) == 42.75)
+    assert(rows(0).getDouble(8) == 1.0000000000000002)
+  }
+
+  test("Date types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "dates", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 5)
+    assert(types(0).equals("class java.sql.Date"))
+    assert(types(1).equals("class java.sql.Timestamp"))
+    assert(types(2).equals("class java.sql.Timestamp"))
+    assert(types(3).equals("class java.sql.Timestamp"))
+    assert(types(4).equals("class java.sql.Date"))
+    assert(rows(0).getAs[Date](0).equals(Date.valueOf("1991-11-09")))
+    assert(rows(0).getAs[Timestamp](1).equals(Timestamp.valueOf("1970-01-01 13:31:24")))
+    assert(rows(0).getAs[Timestamp](2).equals(Timestamp.valueOf("1996-01-01 01:23:45")))
+    assert(rows(0).getAs[Timestamp](3).equals(Timestamp.valueOf("2009-02-13 23:31:30")))
+    assert(rows(0).getAs[Date](4).equals(Date.valueOf("2001-01-01")))
+  }
+
+  test("String types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "strings", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 9)
+    assert(types(0).equals("class java.lang.String"))
+    assert(types(1).equals("class java.lang.String"))
+    assert(types(2).equals("class java.lang.String"))
+    assert(types(3).equals("class java.lang.String"))
+    assert(types(4).equals("class java.lang.String"))
+    assert(types(5).equals("class java.lang.String"))
+    assert(types(6).equals("class [B"))
+    assert(types(7).equals("class [B"))
+    assert(types(8).equals("class [B"))
+    assert(rows(0).getString(0).equals("the"))
+    assert(rows(0).getString(1).equals("quick"))
+    assert(rows(0).getString(2).equals("brown"))
+    assert(rows(0).getString(3).equals("fox"))
+    assert(rows(0).getString(4).equals("jumps"))
+    assert(rows(0).getString(5).equals("over"))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](6), Array[Byte](116, 104, 101, 0)))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](7), Array[Byte](108, 97, 122, 121)))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](8), Array[Byte](100, 111, 103)))
+  }
+
+  test("Basic write test") {
+    val df1 = sqlContext.read.jdbc(jdbcUrl, "numbers", new Properties)
+    val df2 = sqlContext.read.jdbc(jdbcUrl, "dates", new Properties)
+    val df3 = sqlContext.read.jdbc(jdbcUrl, "strings", new Properties)
+    df1.write.jdbc(jdbcUrl, "numberscopy", new Properties)
+    df2.write.jdbc(jdbcUrl, "datescopy", new Properties)
+    df3.write.jdbc(jdbcUrl, "stringscopy", new Properties)
+  }
+}
diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
new file mode 100644
index 000000000000..164a7f396280
--- /dev/null
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
@@ -0,0 +1,82 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.jdbc
+
+import java.sql.Connection
+import java.util.Properties
+
+import org.apache.spark.tags.DockerTest
+
+@DockerTest
+class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
+  override val db = new DatabaseOnDocker {
+    override val imageName = "postgres:9.4.5"
+    override val env = Map(
+      "POSTGRES_PASSWORD" -> "rootpass"
+    )
+    override val jdbcPort = 5432
+    override def getJdbcUrl(ip: String, port: Int): String =
+      s"jdbc:postgresql://$ip:$port/postgres?user=postgres&password=rootpass"
+  }
+
+  override def dataPreparation(conn: Connection): Unit = {
+    conn.prepareStatement("CREATE DATABASE foo").executeUpdate()
+    conn.setCatalog("foo")
+    conn.prepareStatement("CREATE TABLE bar (a text, b integer, c double precision, d bigint, "
+      + "e bit(1), f bit(10), g bytea, h boolean, i inet, j cidr)").executeUpdate()
+    conn.prepareStatement("INSERT INTO bar VALUES ('hello', 42, 1.25, 123456789012345, B'0', "
+      + "B'1000100101', E'\\\\xDEADBEEF', true, '172.16.0.42', '192.168.0.0/16')").executeUpdate()
+  }
+
+  test("Type mapping for various types") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "bar", new Properties)
+    val rows = df.collect()
+    assert(rows.length == 1)
+    val types = rows(0).toSeq.map(x => x.getClass.toString)
+    assert(types.length == 10)
+    assert(types(0).equals("class java.lang.String"))
+    assert(types(1).equals("class java.lang.Integer"))
+    assert(types(2).equals("class java.lang.Double"))
+    assert(types(3).equals("class java.lang.Long"))
+    assert(types(4).equals("class java.lang.Boolean"))
+    assert(types(5).equals("class [B"))
+    assert(types(6).equals("class [B"))
+    assert(types(7).equals("class java.lang.Boolean"))
+    assert(types(8).equals("class java.lang.String"))
+    assert(types(9).equals("class java.lang.String"))
+    assert(rows(0).getString(0).equals("hello"))
+    assert(rows(0).getInt(1) == 42)
+    assert(rows(0).getDouble(2) == 1.25)
+    assert(rows(0).getLong(3) == 123456789012345L)
+    assert(rows(0).getBoolean(4) == false)
+    // BIT(10)'s come back as ASCII strings of ten ASCII 0's and 1's...
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](5),
+      Array[Byte](49, 48, 48, 48, 49, 48, 48, 49, 48, 49)))
+    assert(java.util.Arrays.equals(rows(0).getAs[Array[Byte]](6),
+      Array[Byte](0xDE.toByte, 0xAD.toByte, 0xBE.toByte, 0xEF.toByte)))
+    assert(rows(0).getBoolean(7) == true)
+    assert(rows(0).getString(8) == "172.16.0.42")
+    assert(rows(0).getString(9) == "192.168.0.0/16")
+  }
+
+  test("Basic write test") {
+    val df = sqlContext.read.jdbc(jdbcUrl, "bar", new Properties)
+    df.write.jdbc(jdbcUrl, "public.barcopy", new Properties)
+    // Test only that it doesn't crash.
+  }
+}
diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/util/DockerUtils.scala b/docker-integration-tests/src/test/scala/org/apache/spark/util/DockerUtils.scala
new file mode 100644
index 000000000000..87271776d856
--- /dev/null
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/util/DockerUtils.scala
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.util
+
+import java.net.{Inet4Address, NetworkInterface, InetAddress}
+
+import scala.collection.JavaConverters._
+import scala.sys.process._
+import scala.util.Try
+
+private[spark] object DockerUtils {
+
+  def getDockerIp(): String = {
+    /** If docker-machine is setup on this box, attempts to find the ip from it. */
+    def findFromDockerMachine(): Option[String] = {
+      sys.env.get("DOCKER_MACHINE_NAME").flatMap { name =>
+        Try(Seq("/bin/bash", "-c", s"docker-machine ip $name 2>/dev/null").!!.trim).toOption
+      }
+    }
+    sys.env.get("DOCKER_IP")
+      .orElse(findFromDockerMachine())
+      .orElse(Try(Seq("/bin/bash", "-c", "boot2docker ip 2>/dev/null").!!.trim).toOption)
+      .getOrElse {
+        // This block of code is based on Utils.findLocalInetAddress(), but is modified to blacklist
+        // certain interfaces.
+        val address = InetAddress.getLocalHost
+        // Address resolves to something like 127.0.1.1, which happens on Debian; try to find
+        // a better address using the local network interfaces
+        // getNetworkInterfaces returns ifs in reverse order compared to ifconfig output order
+        // on unix-like system. On windows, it returns in index order.
+        // It's more proper to pick ip address following system output order.
+        val blackListedIFs = Seq(
+          "vboxnet0",  // Mac
+          "docker0"    // Linux
+        )
+        val activeNetworkIFs = NetworkInterface.getNetworkInterfaces.asScala.toSeq.filter { i =>
+          !blackListedIFs.contains(i.getName)
+        }
+        val reOrderedNetworkIFs = activeNetworkIFs.reverse
+        for (ni <- reOrderedNetworkIFs) {
+          val addresses = ni.getInetAddresses.asScala
+            .filterNot(addr => addr.isLinkLocalAddress || addr.isLoopbackAddress).toSeq
+          if (addresses.nonEmpty) {
+            val addr = addresses.find(_.isInstanceOf[Inet4Address]).getOrElse(addresses.head)
+            // because of Inet6Address.toHostName may add interface at the end if it knows about it
+            val strippedAddress = InetAddress.getByAddress(addr.getAddress)
+            return strippedAddress.getHostAddress
+          }
+        }
+        address.getHostAddress
+      }
+  }
+}
diff --git a/pom.xml b/pom.xml
index fd8c77351388..c499a80aa0f4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -98,6 +98,7 @@
     <module>sql/catalyst</module>
     <module>sql/core</module>
     <module>sql/hive</module>
+    <module>docker-integration-tests</module>
     <module>unsafe</module>
     <module>assembly</module>
     <module>external/twitter</module>
@@ -778,6 +779,19 @@
         <version>0.11</version>
         <scope>test</scope>
       </dependency>
+      <dependency>
+        <groupId>com.spotify</groupId>
+        <artifactId>docker-client</artifactId>
+        <classifier>shaded</classifier>
+        <version>3.2.1</version>
+        <scope>test</scope>
+        <exclusions>
+          <exclusion>
+            <artifactId>guava</artifactId>
+            <groupId>com.google.guava</groupId>
+          </exclusion>
+        </exclusions>
+      </dependency>
       <dependency>
         <groupId>org.apache.curator</groupId>
         <artifactId>curator-recipes</artifactId>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index a9fb741d7593..b7c619224329 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -43,8 +43,9 @@ object BuildCommons {
       "streaming-zeromq", "launcher", "unsafe", "test-tags").map(ProjectRef(buildLocation, _))
 
   val optionallyEnabledProjects@Seq(yarn, yarnStable, java8Tests, sparkGangliaLgpl,
-    streamingKinesisAsl) = Seq("yarn", "yarn-stable", "java8-tests", "ganglia-lgpl",
-    "streaming-kinesis-asl").map(ProjectRef(buildLocation, _))
+    streamingKinesisAsl, dockerIntegrationTests) =
+    Seq("yarn", "yarn-stable", "java8-tests", "ganglia-lgpl", "streaming-kinesis-asl",
+      "docker-integration-tests").map(ProjectRef(buildLocation, _))
 
   val assemblyProjects@Seq(assembly, examples, networkYarn, streamingFlumeAssembly, streamingKafkaAssembly, streamingMqttAssembly, streamingKinesisAslAssembly) =
     Seq("assembly", "examples", "network-yarn", "streaming-flume-assembly", "streaming-kafka-assembly", "streaming-mqtt-assembly", "streaming-kinesis-asl-assembly")
@@ -240,6 +241,8 @@ object SparkBuild extends PomBuild {
 
   enable(Flume.settings)(streamingFlumeSink)
 
+  enable(DockerIntegrationTests.settings)(dockerIntegrationTests)
+
 
   /**
    * Adds the ability to run the spark shell directly from SBT without building an assembly
@@ -291,6 +294,13 @@ object Flume {
   lazy val settings = sbtavro.SbtAvro.avroSettings
 }
 
+object DockerIntegrationTests {
+  // This serves to override the override specified in DependencyOverrides:
+  lazy val settings = Seq(
+    dependencyOverrides += "com.google.guava" % "guava" % "18.0"
+  )
+}
+
 /**
  * Overrides to work around sbt's dependency resolution being different from Maven's.
  */
diff --git a/tags/src/main/java/org/apache/spark/tags/DockerTest.java b/tags/src/main/java/org/apache/spark/tags/DockerTest.java
new file mode 100644
index 000000000000..0fecf3b8f979
--- /dev/null
+++ b/tags/src/main/java/org/apache/spark/tags/DockerTest.java
@@ -0,0 +1,26 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.tags;
+
+import java.lang.annotation.*;
+import org.scalatest.TagAnnotation;
+
+@TagAnnotation
+@Retention(RetentionPolicy.RUNTIME)
+@Target({ElementType.METHOD, ElementType.TYPE})
+public @interface DockerTest { }

From e281b87398f1298cc3df8e0409c7040acdddce03 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 10 Nov 2015 16:20:10 -0800
Subject: [PATCH 608/896] [SPARK-5565][ML] LDA wrapper for Pipelines API

This adds LDA to spark.ml, the Pipelines API.  It follows the design doc in the JIRA: [https://issues.apache.org/jira/browse/SPARK-5565], with one major change:
* I eliminated doc IDs.  These are not necessary with DataFrames since the user can add an ID column as needed.

Note: This will conflict with [https://github.com/apache/spark/pull/9484], but I'll try to merge [https://github.com/apache/spark/pull/9484] first and then rebase this PR.

CC: hhbyyh feynmanliang  If you have a chance to make a pass, that'd be really helpful--thanks!  Now that I'm done traveling & this PR is almost ready, I'll see about reviewing other PRs critical for 1.6.

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9513 from jkbradley/lda-pipelines.
---
 .../org/apache/spark/ml/clustering/LDA.scala  | 701 ++++++++++++++++++
 .../spark/mllib/clustering/LDAModel.scala     |  29 +-
 .../apache/spark/ml/clustering/LDASuite.scala | 221 ++++++
 3 files changed, 946 insertions(+), 5 deletions(-)
 create mode 100644 mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
new file mode 100644
index 000000000000..f66233ed3d0f
--- /dev/null
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
@@ -0,0 +1,701 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.clustering
+
+import org.apache.spark.Logging
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
+import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.ml.param.shared.{HasCheckpointInterval, HasFeaturesCol, HasSeed, HasMaxIter}
+import org.apache.spark.ml.param._
+import org.apache.spark.mllib.clustering.{DistributedLDAModel => OldDistributedLDAModel,
+    EMLDAOptimizer => OldEMLDAOptimizer, LDA => OldLDA, LDAModel => OldLDAModel,
+    LDAOptimizer => OldLDAOptimizer, LocalLDAModel => OldLocalLDAModel,
+    OnlineLDAOptimizer => OldOnlineLDAOptimizer}
+import org.apache.spark.mllib.linalg.{VectorUDT, Vectors, Matrix, Vector}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.{SQLContext, DataFrame, Row}
+import org.apache.spark.sql.functions.{col, monotonicallyIncreasingId, udf}
+import org.apache.spark.sql.types.StructType
+
+
+private[clustering] trait LDAParams extends Params with HasFeaturesCol with HasMaxIter
+  with HasSeed with HasCheckpointInterval {
+
+  /**
+   * Param for the number of topics (clusters) to infer. Must be > 1. Default: 10.
+   * @group param
+   */
+  @Since("1.6.0")
+  final val k = new IntParam(this, "k", "number of topics (clusters) to infer",
+    ParamValidators.gt(1))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getK: Int = $(k)
+
+  /**
+   * Concentration parameter (commonly named "alpha") for the prior placed on documents'
+   * distributions over topics ("theta").
+   *
+   * This is the parameter to a Dirichlet distribution, where larger values mean more smoothing
+   * (more regularization).
+   *
+   * If not set by the user, then docConcentration is set automatically. If set to
+   * singleton vector [alpha], then alpha is replicated to a vector of length k in fitting.
+   * Otherwise, the [[docConcentration]] vector must be length k.
+   * (default = automatic)
+   *
+   * Optimizer-specific parameter settings:
+   *  - EM
+   *     - Currently only supports symmetric distributions, so all values in the vector should be
+   *       the same.
+   *     - Values should be > 1.0
+   *     - default = uniformly (50 / k) + 1, where 50/k is common in LDA libraries and +1 follows
+   *       from Asuncion et al. (2009), who recommend a +1 adjustment for EM.
+   *  - Online
+   *     - Values should be >= 0
+   *     - default = uniformly (1.0 / k), following the implementation from
+   *       [[https://github.com/Blei-Lab/onlineldavb]].
+   * @group param
+   */
+  @Since("1.6.0")
+  final val docConcentration = new DoubleArrayParam(this, "docConcentration",
+    "Concentration parameter (commonly named \"alpha\") for the prior placed on documents'" +
+      " distributions over topics (\"theta\").", (alpha: Array[Double]) => alpha.forall(_ >= 0.0))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getDocConcentration: Array[Double] = $(docConcentration)
+
+  /** Get docConcentration used by spark.mllib LDA */
+  protected def getOldDocConcentration: Vector = {
+    if (isSet(docConcentration)) {
+      Vectors.dense(getDocConcentration)
+    } else {
+      Vectors.dense(-1.0)
+    }
+  }
+
+  /**
+   * Concentration parameter (commonly named "beta" or "eta") for the prior placed on topics'
+   * distributions over terms.
+   *
+   * This is the parameter to a symmetric Dirichlet distribution.
+   *
+   * Note: The topics' distributions over terms are called "beta" in the original LDA paper
+   * by Blei et al., but are called "phi" in many later papers such as Asuncion et al., 2009.
+   *
+   * If not set by the user, then topicConcentration is set automatically.
+   *  (default = automatic)
+   *
+   * Optimizer-specific parameter settings:
+   *  - EM
+   *     - Value should be > 1.0
+   *     - default = 0.1 + 1, where 0.1 gives a small amount of smoothing and +1 follows
+   *       Asuncion et al. (2009), who recommend a +1 adjustment for EM.
+   *  - Online
+   *     - Value should be >= 0
+   *     - default = (1.0 / k), following the implementation from
+   *       [[https://github.com/Blei-Lab/onlineldavb]].
+   * @group param
+   */
+  @Since("1.6.0")
+  final val topicConcentration = new DoubleParam(this, "topicConcentration",
+    "Concentration parameter (commonly named \"beta\" or \"eta\") for the prior placed on topic'" +
+      " distributions over terms.", ParamValidators.gtEq(0))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getTopicConcentration: Double = $(topicConcentration)
+
+  /** Get topicConcentration used by spark.mllib LDA */
+  protected def getOldTopicConcentration: Double = {
+    if (isSet(topicConcentration)) {
+      getTopicConcentration
+    } else {
+      -1.0
+    }
+  }
+
+  /** Supported values for Param [[optimizer]]. */
+  @Since("1.6.0")
+  final val supportedOptimizers: Array[String] = Array("online", "em")
+
+  /**
+   * Optimizer or inference algorithm used to estimate the LDA model.
+   * Currently supported (case-insensitive):
+   *  - "online": Online Variational Bayes (default)
+   *  - "em": Expectation-Maximization
+   *
+   * For details, see the following papers:
+   *  - Online LDA:
+   *     Hoffman, Blei and Bach.  "Online Learning for Latent Dirichlet Allocation."
+   *     Neural Information Processing Systems, 2010.
+   *     [[http://www.cs.columbia.edu/~blei/papers/HoffmanBleiBach2010b.pdf]]
+   *  - EM:
+   *     Asuncion et al.  "On Smoothing and Inference for Topic Models."
+   *     Uncertainty in Artificial Intelligence, 2009.
+   *     [[http://arxiv.org/pdf/1205.2662.pdf]]
+   *
+   * @group param
+   */
+  @Since("1.6.0")
+  final val optimizer = new Param[String](this, "optimizer", "Optimizer or inference" +
+    " algorithm used to estimate the LDA model.  Supported: " + supportedOptimizers.mkString(", "),
+    (o: String) => ParamValidators.inArray(supportedOptimizers).apply(o.toLowerCase))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getOptimizer: String = $(optimizer)
+
+  /**
+   * Output column with estimates of the topic mixture distribution for each document (often called
+   * "theta" in the literature).  Returns a vector of zeros for an empty document.
+   *
+   * This uses a variational approximation following Hoffman et al. (2010), where the approximate
+   * distribution is called "gamma."  Technically, this method returns this approximation "gamma"
+   * for each document.
+   * @group param
+   */
+  @Since("1.6.0")
+  final val topicDistributionCol = new Param[String](this, "topicDistribution", "Output column" +
+    " with estimates of the topic mixture distribution for each document (often called \"theta\"" +
+    " in the literature).  Returns a vector of zeros for an empty document.")
+
+  setDefault(topicDistributionCol -> "topicDistribution")
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getTopicDistributionCol: String = $(topicDistributionCol)
+
+  /**
+   * A (positive) learning parameter that downweights early iterations. Larger values make early
+   * iterations count less.
+   * This is called "tau0" in the Online LDA paper (Hoffman et al., 2010)
+   * Default: 1024, following Hoffman et al.
+   * @group expertParam
+   */
+  @Since("1.6.0")
+  final val learningOffset = new DoubleParam(this, "learningOffset", "A (positive) learning" +
+    " parameter that downweights early iterations. Larger values make early iterations count less.",
+    ParamValidators.gt(0))
+
+  /** @group expertGetParam */
+  @Since("1.6.0")
+  def getLearningOffset: Double = $(learningOffset)
+
+  /**
+   * Learning rate, set as an exponential decay rate.
+   * This should be between (0.5, 1.0] to guarantee asymptotic convergence.
+   * This is called "kappa" in the Online LDA paper (Hoffman et al., 2010).
+   * Default: 0.51, based on Hoffman et al.
+   * @group expertParam
+   */
+  @Since("1.6.0")
+  final val learningDecay = new DoubleParam(this, "learningDecay", "Learning rate, set as an" +
+    " exponential decay rate. This should be between (0.5, 1.0] to guarantee asymptotic" +
+    " convergence.", ParamValidators.gt(0))
+
+  /** @group expertGetParam */
+  @Since("1.6.0")
+  def getLearningDecay: Double = $(learningDecay)
+
+  /**
+   * Fraction of the corpus to be sampled and used in each iteration of mini-batch gradient descent,
+   * in range (0, 1].
+   *
+   * Note that this should be adjusted in synch with [[LDA.maxIter]]
+   * so the entire corpus is used.  Specifically, set both so that
+   * maxIterations * miniBatchFraction >= 1.
+   *
+   * Note: This is the same as the `miniBatchFraction` parameter in
+   *       [[org.apache.spark.mllib.clustering.OnlineLDAOptimizer]].
+   *
+   * Default: 0.05, i.e., 5% of total documents.
+   * @group param
+   */
+  @Since("1.6.0")
+  final val subsamplingRate = new DoubleParam(this, "subsamplingRate", "Fraction of the corpus" +
+    " to be sampled and used in each iteration of mini-batch gradient descent, in range (0, 1].",
+    ParamValidators.inRange(0.0, 1.0, lowerInclusive = false, upperInclusive = true))
+
+  /** @group getParam */
+  @Since("1.6.0")
+  def getSubsamplingRate: Double = $(subsamplingRate)
+
+  /**
+   * Indicates whether the docConcentration (Dirichlet parameter for
+   * document-topic distribution) will be optimized during training.
+   * Setting this to true will make the model more expressive and fit the training data better.
+   * Default: false
+   * @group expertParam
+   */
+  @Since("1.6.0")
+  final val optimizeDocConcentration = new BooleanParam(this, "optimizeDocConcentration",
+    "Indicates whether the docConcentration (Dirichlet parameter for document-topic" +
+      " distribution) will be optimized during training.")
+
+  /** @group expertGetParam */
+  @Since("1.6.0")
+  def getOptimizeDocConcentration: Boolean = $(optimizeDocConcentration)
+
+  /**
+   * Validates and transforms the input schema.
+   * @param schema input schema
+   * @return output schema
+   */
+  protected def validateAndTransformSchema(schema: StructType): StructType = {
+    SchemaUtils.checkColumnType(schema, $(featuresCol), new VectorUDT)
+    SchemaUtils.appendColumn(schema, $(topicDistributionCol), new VectorUDT)
+  }
+
+  @Since("1.6.0")
+  override def validateParams(): Unit = {
+    if (isSet(docConcentration)) {
+      if (getDocConcentration.length != 1) {
+        require(getDocConcentration.length == getK, s"LDA docConcentration was of length" +
+          s" ${getDocConcentration.length}, but k = $getK.  docConcentration must be an array of" +
+          s" length either 1 (scalar) or k (num topics).")
+      }
+      getOptimizer match {
+        case "online" =>
+          require(getDocConcentration.forall(_ >= 0),
+            "For Online LDA optimizer, docConcentration values must be >= 0.  Found values: " +
+              getDocConcentration.mkString(","))
+        case "em" =>
+          require(getDocConcentration.forall(_ >= 0),
+            "For EM optimizer, docConcentration values must be >= 1.  Found values: " +
+              getDocConcentration.mkString(","))
+      }
+    }
+    if (isSet(topicConcentration)) {
+      getOptimizer match {
+        case "online" =>
+          require(getTopicConcentration >= 0, s"For Online LDA optimizer, topicConcentration" +
+            s" must be >= 0.  Found value: $getTopicConcentration")
+        case "em" =>
+          require(getTopicConcentration >= 0, s"For EM optimizer, topicConcentration" +
+            s" must be >= 1.  Found value: $getTopicConcentration")
+      }
+    }
+  }
+
+  private[clustering] def getOldOptimizer: OldLDAOptimizer = getOptimizer match {
+    case "online" =>
+      new OldOnlineLDAOptimizer()
+        .setTau0($(learningOffset))
+        .setKappa($(learningDecay))
+        .setMiniBatchFraction($(subsamplingRate))
+        .setOptimizeDocConcentration($(optimizeDocConcentration))
+    case "em" =>
+      new OldEMLDAOptimizer()
+  }
+}
+
+
+/**
+ * :: Experimental ::
+ * Model fitted by [[LDA]].
+ *
+ * @param vocabSize  Vocabulary size (number of terms or terms in the vocabulary)
+ * @param oldLocalModel  Underlying spark.mllib model.
+ *                       If this model was produced by Online LDA, then this is the
+ *                       only model representation.
+ *                       If this model was produced by EM, then this local
+ *                       representation may be built lazily.
+ * @param sqlContext  Used to construct local DataFrames for returning query results
+ */
+@Since("1.6.0")
+@Experimental
+class LDAModel private[ml] (
+    @Since("1.6.0") override val uid: String,
+    @Since("1.6.0") val vocabSize: Int,
+    @Since("1.6.0") protected var oldLocalModel: Option[OldLocalLDAModel],
+    @Since("1.6.0") @transient protected val sqlContext: SQLContext)
+  extends Model[LDAModel] with LDAParams with Logging {
+
+  /** Returns underlying spark.mllib model */
+  @Since("1.6.0")
+  protected def getModel: OldLDAModel = oldLocalModel match {
+    case Some(m) => m
+    case None =>
+      // Should never happen.
+      throw new RuntimeException("LDAModel required local model format," +
+        " but the underlying model is missing.")
+  }
+
+  /**
+   * The features for LDA should be a [[Vector]] representing the word counts in a document.
+   * The vector should be of length vocabSize, with counts for each term (word).
+   * @group setParam
+   */
+  @Since("1.6.0")
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setSeed(value: Long): this.type = set(seed, value)
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): LDAModel = {
+    val copied = new LDAModel(uid, vocabSize, oldLocalModel, sqlContext)
+    copyValues(copied, extra).setParent(parent)
+  }
+
+  @Since("1.6.0")
+  override def transform(dataset: DataFrame): DataFrame = {
+    if ($(topicDistributionCol).nonEmpty) {
+      val t = udf(oldLocalModel.get.getTopicDistributionMethod(sqlContext.sparkContext))
+      dataset.withColumn($(topicDistributionCol), t(col($(featuresCol))))
+    } else {
+      logWarning("LDAModel.transform was called without any output columns. Set an output column" +
+        " such as topicDistributionCol to produce results.")
+      dataset
+    }
+  }
+
+  @Since("1.6.0")
+  override def transformSchema(schema: StructType): StructType = {
+    validateAndTransformSchema(schema)
+  }
+
+  /**
+   * Value for [[docConcentration]] estimated from data.
+   * If Online LDA was used and [[optimizeDocConcentration]] was set to false,
+   * then this returns the fixed (given) value for the [[docConcentration]] parameter.
+   */
+  @Since("1.6.0")
+  def estimatedDocConcentration: Vector = getModel.docConcentration
+
+  /**
+   * Inferred topics, where each topic is represented by a distribution over terms.
+   * This is a matrix of size vocabSize x k, where each column is a topic.
+   * No guarantees are given about the ordering of the topics.
+   *
+   * WARNING: If this model is actually a [[DistributedLDAModel]] instance from EM,
+   *          then this method could involve collecting a large amount of data to the driver
+   *          (on the order of vocabSize x k).
+   */
+  @Since("1.6.0")
+  def topicsMatrix: Matrix = getModel.topicsMatrix
+
+  /** Indicates whether this instance is of type [[DistributedLDAModel]] */
+  @Since("1.6.0")
+  def isDistributed: Boolean = false
+
+  /**
+   * Calculates a lower bound on the log likelihood of the entire corpus.
+   *
+   * See Equation (16) in the Online LDA paper (Hoffman et al., 2010).
+   *
+   * WARNING: If this model was learned via a [[DistributedLDAModel]], this involves collecting
+   *          a large [[topicsMatrix]] to the driver.  This implementation may be changed in the
+   *          future.
+   *
+   * @param dataset  test corpus to use for calculating log likelihood
+   * @return variational lower bound on the log likelihood of the entire corpus
+   */
+  @Since("1.6.0")
+  def logLikelihood(dataset: DataFrame): Double = oldLocalModel match {
+    case Some(m) =>
+      val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
+      m.logLikelihood(oldDataset)
+    case None =>
+      // Should never happen.
+      throw new RuntimeException("LocalLDAModel.logLikelihood was called," +
+        " but the underlying model is missing.")
+  }
+
+  /**
+   * Calculate an upper bound bound on perplexity.  (Lower is better.)
+   * See Equation (16) in the Online LDA paper (Hoffman et al., 2010).
+   *
+   * @param dataset test corpus to use for calculating perplexity
+   * @return Variational upper bound on log perplexity per token.
+   */
+  @Since("1.6.0")
+  def logPerplexity(dataset: DataFrame): Double = oldLocalModel match {
+    case Some(m) =>
+      val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
+      m.logPerplexity(oldDataset)
+    case None =>
+      // Should never happen.
+      throw new RuntimeException("LocalLDAModel.logPerplexity was called," +
+        " but the underlying model is missing.")
+  }
+
+  /**
+   * Return the topics described by their top-weighted terms.
+   *
+   * @param maxTermsPerTopic  Maximum number of terms to collect for each topic.
+   *                          Default value of 10.
+   * @return  Local DataFrame with one topic per Row, with columns:
+   *           - "topic": IntegerType: topic index
+   *           - "termIndices": ArrayType(IntegerType): term indices, sorted in order of decreasing
+   *                            term importance
+   *           - "termWeights": ArrayType(DoubleType): corresponding sorted term weights
+   */
+  @Since("1.6.0")
+  def describeTopics(maxTermsPerTopic: Int): DataFrame = {
+    val topics = getModel.describeTopics(maxTermsPerTopic).zipWithIndex.map {
+      case ((termIndices, termWeights), topic) =>
+        (topic, termIndices.toSeq, termWeights.toSeq)
+    }
+    sqlContext.createDataFrame(topics).toDF("topic", "termIndices", "termWeights")
+  }
+
+  @Since("1.6.0")
+  def describeTopics(): DataFrame = describeTopics(10)
+}
+
+
+/**
+ * :: Experimental ::
+ *
+ * Distributed model fitted by [[LDA]] using Expectation-Maximization (EM).
+ *
+ * This model stores the inferred topics, the full training dataset, and the topic distribution
+ * for each training document.
+ */
+@Since("1.6.0")
+@Experimental
+class DistributedLDAModel private[ml] (
+    uid: String,
+    vocabSize: Int,
+    private val oldDistributedModel: OldDistributedLDAModel,
+    sqlContext: SQLContext)
+  extends LDAModel(uid, vocabSize, None, sqlContext) {
+
+  /**
+   * Convert this distributed model to a local representation.  This discards info about the
+   * training dataset.
+   */
+  @Since("1.6.0")
+  def toLocal: LDAModel = {
+    if (oldLocalModel.isEmpty) {
+      oldLocalModel = Some(oldDistributedModel.toLocal)
+    }
+    new LDAModel(uid, vocabSize, oldLocalModel, sqlContext)
+  }
+
+  @Since("1.6.0")
+  override protected def getModel: OldLDAModel = oldDistributedModel
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): DistributedLDAModel = {
+    val copied = new DistributedLDAModel(uid, vocabSize, oldDistributedModel, sqlContext)
+    if (oldLocalModel.nonEmpty) copied.oldLocalModel = oldLocalModel
+    copyValues(copied, extra).setParent(parent)
+    copied
+  }
+
+  @Since("1.6.0")
+  override def topicsMatrix: Matrix = {
+    if (oldLocalModel.isEmpty) {
+      oldLocalModel = Some(oldDistributedModel.toLocal)
+    }
+    super.topicsMatrix
+  }
+
+  @Since("1.6.0")
+  override def isDistributed: Boolean = true
+
+  @Since("1.6.0")
+  override def logLikelihood(dataset: DataFrame): Double = {
+    if (oldLocalModel.isEmpty) {
+      oldLocalModel = Some(oldDistributedModel.toLocal)
+    }
+    super.logLikelihood(dataset)
+  }
+
+  @Since("1.6.0")
+  override def logPerplexity(dataset: DataFrame): Double = {
+    if (oldLocalModel.isEmpty) {
+      oldLocalModel = Some(oldDistributedModel.toLocal)
+    }
+    super.logPerplexity(dataset)
+  }
+
+  /**
+   * Log likelihood of the observed tokens in the training set,
+   * given the current parameter estimates:
+   *  log P(docs | topics, topic distributions for docs, Dirichlet hyperparameters)
+   *
+   * Notes:
+   *  - This excludes the prior; for that, use [[logPrior]].
+   *  - Even with [[logPrior]], this is NOT the same as the data log likelihood given the
+   *    hyperparameters.
+   *  - This is computed from the topic distributions computed during training. If you call
+   *    [[logLikelihood()]] on the same training dataset, the topic distributions will be computed
+   *    again, possibly giving different results.
+   */
+  @Since("1.6.0")
+  lazy val trainingLogLikelihood: Double = oldDistributedModel.logLikelihood
+
+  /**
+   * Log probability of the current parameter estimate:
+   * log P(topics, topic distributions for docs | Dirichlet hyperparameters)
+   */
+  @Since("1.6.0")
+  lazy val logPrior: Double = oldDistributedModel.logPrior
+}
+
+
+/**
+ * :: Experimental ::
+ *
+ * Latent Dirichlet Allocation (LDA), a topic model designed for text documents.
+ *
+ * Terminology:
+ *  - "term" = "word": an element of the vocabulary
+ *  - "token": instance of a term appearing in a document
+ *  - "topic": multinomial distribution over terms representing some concept
+ *  - "document": one piece of text, corresponding to one row in the input data
+ *
+ * References:
+ *  - Original LDA paper (journal version):
+ *    Blei, Ng, and Jordan.  "Latent Dirichlet Allocation."  JMLR, 2003.
+ *
+ * Input data (featuresCol):
+ *  LDA is given a collection of documents as input data, via the featuresCol parameter.
+ *  Each document is specified as a [[Vector]] of length vocabSize, where each entry is the
+ *  count for the corresponding term (word) in the document.  Feature transformers such as
+ *  [[org.apache.spark.ml.feature.Tokenizer]] and [[org.apache.spark.ml.feature.CountVectorizer]]
+ *  can be useful for converting text to word count vectors.
+ *
+ * @see [[http://en.wikipedia.org/wiki/Latent_Dirichlet_allocation Latent Dirichlet allocation
+ *       (Wikipedia)]]
+ */
+@Since("1.6.0")
+@Experimental
+class LDA @Since("1.6.0") (
+    @Since("1.6.0") override val uid: String) extends Estimator[LDAModel] with LDAParams {
+
+  @Since("1.6.0")
+  def this() = this(Identifiable.randomUID("lda"))
+
+  setDefault(maxIter -> 20, k -> 10, optimizer -> "online", checkpointInterval -> 10,
+    learningOffset -> 1024, learningDecay -> 0.51, subsamplingRate -> 0.05,
+    optimizeDocConcentration -> true)
+
+  /**
+   * The features for LDA should be a [[Vector]] representing the word counts in a document.
+   * The vector should be of length vocabSize, with counts for each term (word).
+   * @group setParam
+   */
+  @Since("1.6.0")
+  def setFeaturesCol(value: String): this.type = set(featuresCol, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setMaxIter(value: Int): this.type = set(maxIter, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setSeed(value: Long): this.type = set(seed, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setCheckpointInterval(value: Int): this.type = set(checkpointInterval, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setK(value: Int): this.type = set(k, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setDocConcentration(value: Array[Double]): this.type = set(docConcentration, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setDocConcentration(value: Double): this.type = set(docConcentration, Array(value))
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setTopicConcentration(value: Double): this.type = set(topicConcentration, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setOptimizer(value: String): this.type = set(optimizer, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setTopicDistributionCol(value: String): this.type = set(topicDistributionCol, value)
+
+  /** @group expertSetParam */
+  @Since("1.6.0")
+  def setLearningOffset(value: Double): this.type = set(learningOffset, value)
+
+  /** @group expertSetParam */
+  @Since("1.6.0")
+  def setLearningDecay(value: Double): this.type = set(learningDecay, value)
+
+  /** @group setParam */
+  @Since("1.6.0")
+  def setSubsamplingRate(value: Double): this.type = set(subsamplingRate, value)
+
+  /** @group expertSetParam */
+  @Since("1.6.0")
+  def setOptimizeDocConcentration(value: Boolean): this.type = set(optimizeDocConcentration, value)
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): LDA = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def fit(dataset: DataFrame): LDAModel = {
+    transformSchema(dataset.schema, logging = true)
+    val oldLDA = new OldLDA()
+      .setK($(k))
+      .setDocConcentration(getOldDocConcentration)
+      .setTopicConcentration(getOldTopicConcentration)
+      .setMaxIterations($(maxIter))
+      .setSeed($(seed))
+      .setCheckpointInterval($(checkpointInterval))
+      .setOptimizer(getOldOptimizer)
+    // TODO: persist here, or in old LDA?
+    val oldData = LDA.getOldDataset(dataset, $(featuresCol))
+    val oldModel = oldLDA.run(oldData)
+    val newModel = oldModel match {
+      case m: OldLocalLDAModel =>
+        new LDAModel(uid, m.vocabSize, Some(m), dataset.sqlContext)
+      case m: OldDistributedLDAModel =>
+        new DistributedLDAModel(uid, m.vocabSize, m, dataset.sqlContext)
+    }
+    copyValues(newModel).setParent(this)
+  }
+
+  @Since("1.6.0")
+  override def transformSchema(schema: StructType): StructType = {
+    validateAndTransformSchema(schema)
+  }
+}
+
+
+private[clustering] object LDA {
+
+  /** Get dataset for spark.mllib LDA */
+  def getOldDataset(dataset: DataFrame, featuresCol: String): RDD[(Long, Vector)] = {
+    dataset
+      .withColumn("docId", monotonicallyIncreasingId())
+      .select("docId", featuresCol)
+      .map { case Row(docId: Long, features: Vector) =>
+        (docId, features)
+      }
+  }
+}
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
index 31d8a9fdea1c..cd520f09bd46 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
@@ -183,8 +183,7 @@ abstract class LDAModel private[clustering] extends Saveable {
 /**
  * Local LDA model.
  * This model stores only the inferred topics.
- * It may be used for computing topics for new documents, but it may give less accurate answers
- * than the [[DistributedLDAModel]].
+ *
  * @param topics Inferred topics (vocabSize x k matrix).
  */
 @Since("1.3.0")
@@ -353,7 +352,7 @@ class LocalLDAModel private[clustering] (
 
     documents.map { case (id: Long, termCounts: Vector) =>
       if (termCounts.numNonzeros == 0) {
-         (id, Vectors.zeros(k))
+        (id, Vectors.zeros(k))
       } else {
         val (gamma, _) = OnlineLDAOptimizer.variationalTopicInference(
           termCounts,
@@ -366,6 +365,28 @@ class LocalLDAModel private[clustering] (
     }
   }
 
+  /** Get a method usable as a UDF for [[topicDistributions()]] */
+  private[spark] def getTopicDistributionMethod(sc: SparkContext): Vector => Vector = {
+    val expElogbeta = exp(LDAUtils.dirichletExpectation(topicsMatrix.toBreeze.toDenseMatrix.t).t)
+    val expElogbetaBc = sc.broadcast(expElogbeta)
+    val docConcentrationBrz = this.docConcentration.toBreeze
+    val gammaShape = this.gammaShape
+    val k = this.k
+
+    (termCounts: Vector) =>
+      if (termCounts.numNonzeros == 0) {
+        Vectors.zeros(k)
+      } else {
+        val (gamma, _) = OnlineLDAOptimizer.variationalTopicInference(
+          termCounts,
+          expElogbetaBc.value,
+          docConcentrationBrz,
+          gammaShape,
+          k)
+        Vectors.dense(normalize(gamma, 1.0).toArray)
+      }
+  }
+
   /**
    * Java-friendly version of [[topicDistributions]]
    */
@@ -477,8 +498,6 @@ object LocalLDAModel extends Loader[LocalLDAModel] {
 /**
  * Distributed LDA model.
  * This model stores the inferred topics, the full training dataset, and the topic distributions.
- * When computing topics for new documents, it may give more accurate answers
- * than the [[LocalLDAModel]].
  */
 @Since("1.3.0")
 class DistributedLDAModel private[clustering] (
diff --git a/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
new file mode 100644
index 000000000000..edb927495e8b
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
@@ -0,0 +1,221 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.clustering
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
+
+
+object LDASuite {
+  def generateLDAData(
+      sql: SQLContext,
+      rows: Int,
+      k: Int,
+      vocabSize: Int): DataFrame = {
+    val avgWC = 1  // average instances of each word in a doc
+    val sc = sql.sparkContext
+    val rng = new java.util.Random()
+    rng.setSeed(1)
+    val rdd = sc.parallelize(1 to rows).map { i =>
+      Vectors.dense(Array.fill(vocabSize)(rng.nextInt(2 * avgWC).toDouble))
+    }.map(v => new TestRow(v))
+    sql.createDataFrame(rdd)
+  }
+}
+
+
+class LDASuite extends SparkFunSuite with MLlibTestSparkContext {
+
+  val k: Int = 5
+  val vocabSize: Int = 30
+  @transient var dataset: DataFrame = _
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+    dataset = LDASuite.generateLDAData(sqlContext, 50, k, vocabSize)
+  }
+
+  test("default parameters") {
+    val lda = new LDA()
+
+    assert(lda.getFeaturesCol === "features")
+    assert(lda.getMaxIter === 20)
+    assert(lda.isDefined(lda.seed))
+    assert(lda.getCheckpointInterval === 10)
+    assert(lda.getK === 10)
+    assert(!lda.isSet(lda.docConcentration))
+    assert(!lda.isSet(lda.topicConcentration))
+    assert(lda.getOptimizer === "online")
+    assert(lda.getLearningDecay === 0.51)
+    assert(lda.getLearningOffset === 1024)
+    assert(lda.getSubsamplingRate === 0.05)
+    assert(lda.getOptimizeDocConcentration)
+    assert(lda.getTopicDistributionCol === "topicDistribution")
+  }
+
+  test("set parameters") {
+    val lda = new LDA()
+      .setFeaturesCol("test_feature")
+      .setMaxIter(33)
+      .setSeed(123)
+      .setCheckpointInterval(7)
+      .setK(9)
+      .setTopicConcentration(0.56)
+      .setTopicDistributionCol("myOutput")
+
+    assert(lda.getFeaturesCol === "test_feature")
+    assert(lda.getMaxIter === 33)
+    assert(lda.getSeed === 123)
+    assert(lda.getCheckpointInterval === 7)
+    assert(lda.getK === 9)
+    assert(lda.getTopicConcentration === 0.56)
+    assert(lda.getTopicDistributionCol === "myOutput")
+
+
+    // setOptimizer
+    lda.setOptimizer("em")
+    assert(lda.getOptimizer === "em")
+    lda.setOptimizer("online")
+    assert(lda.getOptimizer === "online")
+    lda.setLearningDecay(0.53)
+    assert(lda.getLearningDecay === 0.53)
+    lda.setLearningOffset(1027)
+    assert(lda.getLearningOffset === 1027)
+    lda.setSubsamplingRate(0.06)
+    assert(lda.getSubsamplingRate === 0.06)
+    lda.setOptimizeDocConcentration(false)
+    assert(!lda.getOptimizeDocConcentration)
+  }
+
+  test("parameters validation") {
+    val lda = new LDA()
+
+    // misc Params
+    intercept[IllegalArgumentException] {
+      new LDA().setK(1)
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setOptimizer("no_such_optimizer")
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setDocConcentration(-1.1)
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setTopicConcentration(-1.1)
+    }
+
+    // validateParams()
+    lda.validateParams()
+    lda.setDocConcentration(1.1)
+    lda.validateParams()
+    lda.setDocConcentration(Range(0, lda.getK).map(_ + 2.0).toArray)
+    lda.validateParams()
+    lda.setDocConcentration(Range(0, lda.getK - 1).map(_ + 2.0).toArray)
+    withClue("LDA docConcentration validity check failed for bad array length") {
+      intercept[IllegalArgumentException] {
+        lda.validateParams()
+      }
+    }
+
+    // Online LDA
+    intercept[IllegalArgumentException] {
+      new LDA().setLearningOffset(0)
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setLearningDecay(0)
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setSubsamplingRate(0)
+    }
+    intercept[IllegalArgumentException] {
+      new LDA().setSubsamplingRate(1.1)
+    }
+  }
+
+  test("fit & transform with Online LDA") {
+    val lda = new LDA().setK(k).setSeed(1).setOptimizer("online").setMaxIter(2)
+    val model = lda.fit(dataset)
+
+    MLTestingUtils.checkCopy(model)
+
+    assert(!model.isInstanceOf[DistributedLDAModel])
+    assert(model.vocabSize === vocabSize)
+    assert(model.estimatedDocConcentration.size === k)
+    assert(model.topicsMatrix.numRows === vocabSize)
+    assert(model.topicsMatrix.numCols === k)
+    assert(!model.isDistributed)
+
+    // transform()
+    val transformed = model.transform(dataset)
+    val expectedColumns = Array("features", lda.getTopicDistributionCol)
+    expectedColumns.foreach { column =>
+      assert(transformed.columns.contains(column))
+    }
+    transformed.select(lda.getTopicDistributionCol).collect().foreach { r =>
+      val topicDistribution = r.getAs[Vector](0)
+      assert(topicDistribution.size === k)
+      assert(topicDistribution.toArray.forall(w => w >= 0.0 && w <= 1.0))
+    }
+
+    // logLikelihood, logPerplexity
+    val ll = model.logLikelihood(dataset)
+    assert(ll <= 0.0 && ll != Double.NegativeInfinity)
+    val lp = model.logPerplexity(dataset)
+    assert(lp >= 0.0 && lp != Double.PositiveInfinity)
+
+    // describeTopics
+    val topics = model.describeTopics(3)
+    assert(topics.count() === k)
+    assert(topics.select("topic").map(_.getInt(0)).collect().toSet === Range(0, k).toSet)
+    topics.select("termIndices").collect().foreach { case r: Row =>
+      val termIndices = r.getAs[Seq[Int]](0)
+      assert(termIndices.length === 3 && termIndices.toSet.size === 3)
+    }
+    topics.select("termWeights").collect().foreach { case r: Row =>
+      val termWeights = r.getAs[Seq[Double]](0)
+      assert(termWeights.length === 3 && termWeights.forall(w => w >= 0.0 && w <= 1.0))
+    }
+  }
+
+  test("fit & transform with EM LDA") {
+    val lda = new LDA().setK(k).setSeed(1).setOptimizer("em").setMaxIter(2)
+    val model_ = lda.fit(dataset)
+
+    MLTestingUtils.checkCopy(model_)
+
+    assert(model_.isInstanceOf[DistributedLDAModel])
+    val model = model_.asInstanceOf[DistributedLDAModel]
+    assert(model.vocabSize === vocabSize)
+    assert(model.estimatedDocConcentration.size === k)
+    assert(model.topicsMatrix.numRows === vocabSize)
+    assert(model.topicsMatrix.numCols === k)
+    assert(model.isDistributed)
+
+    val localModel = model.toLocal
+    assert(!localModel.isInstanceOf[DistributedLDAModel])
+
+    // training logLikelihood, logPrior
+    val ll = model.trainingLogLikelihood
+    assert(ll <= 0.0 && ll != Double.NegativeInfinity)
+    val lp = model.logPrior
+    assert(lp <= 0.0 && lp != Double.NegativeInfinity)
+  }
+}

From 3121e78168808c015fb21da8b0d44bb33649fb81 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Tue, 10 Nov 2015 16:25:22 -0800
Subject: [PATCH 609/896] [SPARK-9830][SPARK-11641][SQL][FOLLOW-UP] Remove
 AggregateExpression1 and update toString of Exchange

https://issues.apache.org/jira/browse/SPARK-9830

This is the follow-up pr for https://github.com/apache/spark/pull/9556 to address davies' comments.

Author: Yin Huai <yhuai@databricks.com>

Closes #9607 from yhuai/removeAgg1-followup.
---
 .../sql/catalyst/analysis/Analyzer.scala      |   2 +-
 .../sql/catalyst/analysis/CheckAnalysis.scala |  58 +++++---
 .../expressions/aggregate/Average.scala       |   2 +-
 .../aggregate/CentralMomentAgg.scala          |   2 +-
 .../expressions/aggregate/Stddev.scala        |   2 +-
 .../catalyst/expressions/aggregate/Sum.scala  |   2 +-
 .../analysis/AnalysisErrorSuite.scala         | 127 ++++++++++++++----
 .../scala/org/apache/spark/sql/SQLConf.scala  |   1 +
 .../apache/spark/sql/execution/Exchange.scala |   8 +-
 .../apache/spark/sql/execution/commands.scala |  10 ++
 10 files changed, 160 insertions(+), 54 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index b1e14390b7dc..a9cd9a77038e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -532,7 +532,7 @@ class Analyzer(
                 case min: Min if isDistinct =>
                   AggregateExpression(min, Complete, isDistinct = false)
                 // We get an aggregate function, we need to wrap it in an AggregateExpression.
-                case agg2: AggregateFunction => AggregateExpression(agg2, Complete, isDistinct)
+                case agg: AggregateFunction => AggregateExpression(agg, Complete, isDistinct)
                 // This function is not an aggregate function, just return the resolved one.
                 case other => other
               }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
index 8322e9930cd5..5a4b0c1e39ce 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
@@ -110,17 +110,21 @@ trait CheckAnalysis {
           case Aggregate(groupingExprs, aggregateExprs, child) =>
             def checkValidAggregateExpression(expr: Expression): Unit = expr match {
               case aggExpr: AggregateExpression =>
-                // TODO: Is it possible that the child of a agg function is another
-                // agg function?
-                aggExpr.aggregateFunction.children.foreach {
-                  // This is just a sanity check, our analysis rule PullOutNondeterministic should
-                  // already pull out those nondeterministic expressions and evaluate them in
-                  // a Project node.
-                  case child if !child.deterministic =>
+                aggExpr.aggregateFunction.children.foreach { child =>
+                  child.foreach {
+                    case agg: AggregateExpression =>
+                      failAnalysis(
+                        s"It is not allowed to use an aggregate function in the argument of " +
+                          s"another aggregate function. Please use the inner aggregate function " +
+                          s"in a sub-query.")
+                    case other => // OK
+                  }
+
+                  if (!child.deterministic) {
                     failAnalysis(
                       s"nondeterministic expression ${expr.prettyString} should not " +
                         s"appear in the arguments of an aggregate function.")
-                  case child => // OK
+                  }
                 }
               case e: Attribute if !groupingExprs.exists(_.semanticEquals(e)) =>
                 failAnalysis(
@@ -133,19 +137,33 @@ trait CheckAnalysis {
               case e => e.children.foreach(checkValidAggregateExpression)
             }
 
+            def checkSupportedGroupingDataType(
+                expressionString: String,
+                dataType: DataType): Unit = dataType match {
+              case BinaryType =>
+                failAnalysis(s"expression $expressionString cannot be used in " +
+                  s"grouping expression because it is in binary type or its inner field is " +
+                  s"in binary type")
+              case a: ArrayType =>
+                failAnalysis(s"expression $expressionString cannot be used in " +
+                  s"grouping expression because it is in array type or its inner field is " +
+                  s"in array type")
+              case m: MapType =>
+                failAnalysis(s"expression $expressionString cannot be used in " +
+                  s"grouping expression because it is in map type or its inner field is " +
+                  s"in map type")
+              case s: StructType =>
+                s.fields.foreach { f =>
+                  checkSupportedGroupingDataType(expressionString, f.dataType)
+                }
+              case udt: UserDefinedType[_] =>
+                checkSupportedGroupingDataType(expressionString, udt.sqlType)
+              case _ => // OK
+            }
+
             def checkValidGroupingExprs(expr: Expression): Unit = {
-              expr.dataType match {
-                case BinaryType =>
-                  failAnalysis(s"binary type expression ${expr.prettyString} cannot be used " +
-                    "in grouping expression")
-                case a: ArrayType =>
-                  failAnalysis(s"array type expression ${expr.prettyString} cannot be used " +
-                    "in grouping expression")
-                case m: MapType =>
-                  failAnalysis(s"map type expression ${expr.prettyString} cannot be used " +
-                    "in grouping expression")
-                case _ => // OK
-              }
+              checkSupportedGroupingDataType(expr.prettyString, expr.dataType)
+
               if (!expr.deterministic) {
                 // This is just a sanity check, our analysis rule PullOutNondeterministic should
                 // already pull out those nondeterministic expressions and evaluate them in
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
index 7f9e5034702e..94ac4bf09b90 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Average.scala
@@ -34,7 +34,7 @@ case class Average(child: Expression) extends DeclarativeAggregate {
   // Return data type.
   override def dataType: DataType = resultType
 
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(NumericType)
 
   override def checkInputDataTypes(): TypeCheckResult =
     TypeUtils.checkForNumericExpr(child.dataType, "function average")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
index 984ce7f24dac..de5872ab11eb 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
@@ -57,7 +57,7 @@ abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate w
 
   override def dataType: DataType = DoubleType
 
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(NumericType)
 
   override def checkInputDataTypes(): TypeCheckResult =
     TypeUtils.checkForNumericExpr(child.dataType, s"function $prettyName")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
index 5b9eb7ae02f2..274800962335 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
@@ -50,7 +50,7 @@ abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
 
   override def dataType: DataType = resultType
 
-  override def inputTypes: Seq[AbstractDataType] = Seq(TypeCollection(NumericType))
+  override def inputTypes: Seq[AbstractDataType] = Seq(NumericType)
 
   override def checkInputDataTypes(): TypeCheckResult =
     TypeUtils.checkForNumericExpr(child.dataType, "function stddev")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
index c005ec965721..cfb042e0aa78 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Sum.scala
@@ -32,7 +32,7 @@ case class Sum(child: Expression) extends DeclarativeAggregate {
   override def dataType: DataType = resultType
 
   override def inputTypes: Seq[AbstractDataType] =
-    Seq(TypeCollection(LongType, DoubleType, DecimalType, NullType))
+    Seq(TypeCollection(LongType, DoubleType, DecimalType))
 
   override def checkInputDataTypes(): TypeCheckResult =
     TypeUtils.checkForNumericExpr(child.dataType, "function sum")
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
index 5a2368e32997..2e7c3bd67b55 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
@@ -23,8 +23,59 @@ import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.dsl.plans._
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 
+import scala.beans.{BeanProperty, BeanInfo}
+
+@BeanInfo
+private[sql] case class GroupableData(@BeanProperty data: Int)
+
+private[sql] class GroupableUDT extends UserDefinedType[GroupableData] {
+
+  override def sqlType: DataType = IntegerType
+
+  override def serialize(obj: Any): Int = {
+    obj match {
+      case groupableData: GroupableData => groupableData.data
+    }
+  }
+
+  override def deserialize(datum: Any): GroupableData = {
+    datum match {
+      case data: Int => GroupableData(data)
+    }
+  }
+
+  override def userClass: Class[GroupableData] = classOf[GroupableData]
+
+  private[spark] override def asNullable: GroupableUDT = this
+}
+
+@BeanInfo
+private[sql] case class UngroupableData(@BeanProperty data: Array[Int])
+
+private[sql] class UngroupableUDT extends UserDefinedType[UngroupableData] {
+
+  override def sqlType: DataType = ArrayType(IntegerType)
+
+  override def serialize(obj: Any): ArrayData = {
+    obj match {
+      case groupableData: UngroupableData => new GenericArrayData(groupableData.data)
+    }
+  }
+
+  override def deserialize(datum: Any): UngroupableData = {
+    datum match {
+      case data: Array[Int] => UngroupableData(data)
+    }
+  }
+
+  override def userClass: Class[UngroupableData] = classOf[UngroupableData]
+
+  private[spark] override def asNullable: UngroupableUDT = this
+}
+
 case class TestFunction(
     children: Seq[Expression],
     inputTypes: Seq[AbstractDataType])
@@ -194,39 +245,65 @@ class AnalysisErrorSuite extends AnalysisTest {
     assert(error.message.contains("Conflicting attributes"))
   }
 
-  test("aggregation can't work on binary and map types") {
-    val plan =
-      Aggregate(
-        AttributeReference("a", BinaryType)(exprId = ExprId(2)) :: Nil,
-        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
-        LocalRelation(
-          AttributeReference("a", BinaryType)(exprId = ExprId(2)),
-          AttributeReference("b", IntegerType)(exprId = ExprId(1))))
+  test("check grouping expression data types") {
+    def checkDataType(dataType: DataType, shouldSuccess: Boolean): Unit = {
+      val plan =
+        Aggregate(
+          AttributeReference("a", dataType)(exprId = ExprId(2)) :: Nil,
+          Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
+          LocalRelation(
+            AttributeReference("a", dataType)(exprId = ExprId(2)),
+            AttributeReference("b", IntegerType)(exprId = ExprId(1))))
+
+      shouldSuccess match {
+        case true =>
+          assertAnalysisSuccess(plan, true)
+        case false =>
+          assertAnalysisError(plan, "expression a cannot be used in grouping expression" :: Nil)
+      }
 
-    assertAnalysisError(plan,
-      "binary type expression a cannot be used in grouping expression" :: Nil)
+    }
 
-    val plan2 =
-      Aggregate(
-        AttributeReference("a", MapType(IntegerType, StringType))(exprId = ExprId(2)) :: Nil,
-        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
-        LocalRelation(
-          AttributeReference("a", MapType(IntegerType, StringType))(exprId = ExprId(2)),
-          AttributeReference("b", IntegerType)(exprId = ExprId(1))))
+    val supportedDataTypes = Seq(
+      StringType,
+      NullType, BooleanType,
+      ByteType, ShortType, IntegerType, LongType,
+      FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
+      DateType, TimestampType,
+      new StructType()
+        .add("f1", FloatType, nullable = true)
+        .add("f2", StringType, nullable = true),
+      new GroupableUDT())
+    supportedDataTypes.foreach { dataType =>
+      checkDataType(dataType, shouldSuccess = true)
+    }
 
-    assertAnalysisError(plan2,
-      "map type expression a cannot be used in grouping expression" :: Nil)
+    val unsupportedDataTypes = Seq(
+      BinaryType,
+      ArrayType(IntegerType),
+      MapType(StringType, LongType),
+      new StructType()
+        .add("f1", FloatType, nullable = true)
+        .add("f2", ArrayType(BooleanType, containsNull = true), nullable = true),
+      new UngroupableUDT())
+    unsupportedDataTypes.foreach { dataType =>
+      checkDataType(dataType, shouldSuccess = false)
+    }
+  }
 
-    val plan3 =
+  test("we should fail analysis when we find nested aggregate functions") {
+    val plan =
       Aggregate(
-        AttributeReference("a", ArrayType(IntegerType))(exprId = ExprId(2)) :: Nil,
-        Alias(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1))), "c")() :: Nil,
+        AttributeReference("a", IntegerType)(exprId = ExprId(2)) :: Nil,
+        Alias(sum(sum(AttributeReference("b", IntegerType)(exprId = ExprId(1)))), "c")() :: Nil,
         LocalRelation(
-          AttributeReference("a", ArrayType(IntegerType))(exprId = ExprId(2)),
+          AttributeReference("a", IntegerType)(exprId = ExprId(2)),
           AttributeReference("b", IntegerType)(exprId = ExprId(1))))
 
-    assertAnalysisError(plan3,
-      "array type expression a cannot be used in grouping expression" :: Nil)
+    assertAnalysisError(
+      plan,
+      "It is not allowed to use an aggregate function in the argument of " +
+        "another aggregate function." :: Nil)
   }
 
   test("Join can't work on binary and map types") {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 89e196c06600..57d7d30e0eca 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -474,6 +474,7 @@ private[spark] object SQLConf {
   object Deprecated {
     val MAPRED_REDUCE_TASKS = "mapred.reduce.tasks"
     val EXTERNAL_SORT = "spark.sql.planner.externalSort"
+    val USE_SQL_AGGREGATE2 = "spark.sql.useAggregate2"
   }
 }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index a4ce328c1a9e..b733b26987bc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -44,14 +44,14 @@ case class Exchange(
   override def nodeName: String = {
     val extraInfo = coordinator match {
       case Some(exchangeCoordinator) if exchangeCoordinator.isEstimated =>
-        "Shuffle"
+        s"(coordinator id: ${System.identityHashCode(coordinator)})"
       case Some(exchangeCoordinator) if !exchangeCoordinator.isEstimated =>
-        "May shuffle"
-      case None => "Shuffle without coordinator"
+        s"(coordinator id: ${System.identityHashCode(coordinator)})"
+      case None => ""
     }
 
     val simpleNodeName = if (tungstenMode) "TungstenExchange" else "Exchange"
-    s"$simpleNodeName($extraInfo)"
+    s"${simpleNodeName}${extraInfo}"
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index e5f60b15e735..8b2755a58757 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -111,6 +111,16 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
       }
       (keyValueOutput, runFunc)
 
+    case Some((SQLConf.Deprecated.USE_SQL_AGGREGATE2, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.USE_SQL_AGGREGATE2} is deprecated and " +
+            s"will be ignored. ${SQLConf.Deprecated.USE_SQL_AGGREGATE2} will " +
+            s"continue to be true.")
+        Seq(Row(SQLConf.Deprecated.USE_SQL_AGGREGATE2, "true"))
+      }
+      (keyValueOutput, runFunc)
+
     // Configures a single property.
     case Some((key, Some(value))) =>
       val runFunc = (sqlContext: SQLContext) => {

From 21c562fa03430365f5c2b7d6de1f8f60ab2140d4 Mon Sep 17 00:00:00 2001
From: Herman van Hovell <hvanhovell@questtec.nl>
Date: Tue, 10 Nov 2015 16:28:21 -0800
Subject: [PATCH 610/896] [SPARK-9241][SQL] Supporting multiple DISTINCT
 columns - follow-up (3)

This PR is a 2nd follow-up for [SPARK-9241](https://issues.apache.org/jira/browse/SPARK-9241). It contains the following improvements:
* Fix for a potential bug in distinct child expression and attribute alignment.
* Improved handling of duplicate distinct child expressions.
* Added test for distinct UDAF with multiple children.

cc yhuai

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #9566 from hvanhovell/SPARK-9241-followup-2.
---
 .../DistinctAggregationRewriter.scala         |  9 ++--
 .../execution/AggregationQuerySuite.scala     | 41 +++++++++++++++++--
 2 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
index 397eff05686b..c0c960471a61 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
@@ -151,11 +151,12 @@ case class DistinctAggregationRewriter(conf: CatalystConf) extends Rule[LogicalP
       }
 
       // Setup unique distinct aggregate children.
-      val distinctAggChildren = distinctAggGroups.keySet.flatten.toSeq
-      val distinctAggChildAttrMap = distinctAggChildren.map(expressionAttributePair).toMap
-      val distinctAggChildAttrs = distinctAggChildAttrMap.values.toSeq
+      val distinctAggChildren = distinctAggGroups.keySet.flatten.toSeq.distinct
+      val distinctAggChildAttrMap = distinctAggChildren.map(expressionAttributePair)
+      val distinctAggChildAttrs = distinctAggChildAttrMap.map(_._2)
 
       // Setup expand & aggregate operators for distinct aggregate expressions.
+      val distinctAggChildAttrLookup = distinctAggChildAttrMap.toMap
       val distinctAggOperatorMap = distinctAggGroups.toSeq.zipWithIndex.map {
         case ((group, expressions), i) =>
           val id = Literal(i + 1)
@@ -170,7 +171,7 @@ case class DistinctAggregationRewriter(conf: CatalystConf) extends Rule[LogicalP
           val operators = expressions.map { e =>
             val af = e.aggregateFunction
             val naf = patchAggregateFunctionChildren(af) { x =>
-              evalWithinGroup(id, distinctAggChildAttrMap(x))
+              evalWithinGroup(id, distinctAggChildAttrLookup(x))
             }
             (e, e.copy(aggregateFunction = naf, isDistinct = false))
           }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 6bf2c53440ba..8253921563b3 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -66,6 +66,36 @@ class ScalaAggregateFunction(schema: StructType) extends UserDefinedAggregateFun
   }
 }
 
+class LongProductSum extends UserDefinedAggregateFunction {
+  def inputSchema: StructType = new StructType()
+    .add("a", LongType)
+    .add("b", LongType)
+
+  def bufferSchema: StructType = new StructType()
+    .add("product", LongType)
+
+  def dataType: DataType = LongType
+
+  def deterministic: Boolean = true
+
+  def initialize(buffer: MutableAggregationBuffer): Unit = {
+    buffer(0) = 0L
+  }
+
+  def update(buffer: MutableAggregationBuffer, input: Row): Unit = {
+    if (!(input.isNullAt(0) || input.isNullAt(1))) {
+      buffer(0) = buffer.getLong(0) + input.getLong(0) * input.getLong(1)
+    }
+  }
+
+  def merge(buffer1: MutableAggregationBuffer, buffer2: Row): Unit = {
+    buffer1(0) = buffer1.getLong(0) + buffer2.getLong(0)
+  }
+
+  def evaluate(buffer: Row): Any =
+    buffer.getLong(0)
+}
+
 abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
   import testImplicits._
 
@@ -110,6 +140,7 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
     // Register UDAFs
     sqlContext.udf.register("mydoublesum", new MyDoubleSum)
     sqlContext.udf.register("mydoubleavg", new MyDoubleAvg)
+    sqlContext.udf.register("longProductSum", new LongProductSum)
   }
 
   override def afterAll(): Unit = {
@@ -545,19 +576,21 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
           |  count(distinct value2),
           |  sum(distinct value2),
           |  count(distinct value1, value2),
+          |  longProductSum(distinct value1, value2),
           |  count(value1),
           |  sum(value1),
           |  count(value2),
           |  sum(value2),
+          |  longProductSum(value1, value2),
           |  count(*),
           |  count(1)
           |FROM agg2
           |GROUP BY key
         """.stripMargin),
-      Row(null, 3, 30, 3, 60, 3, 3, 30, 3, 60, 4, 4) ::
-        Row(1, 2, 40, 3, -10, 3, 3, 70, 3, -10, 3, 3) ::
-        Row(2, 2, 0, 1, 1, 1, 3, 1, 3, 3, 4, 4) ::
-        Row(3, 0, null, 1, 3, 0, 0, null, 1, 3, 2, 2) :: Nil)
+      Row(null, 3, 30, 3, 60, 3, -4700, 3, 30, 3, 60, -4700, 4, 4) ::
+        Row(1, 2, 40, 3, -10, 3, -100, 3, 70, 3, -10, -100, 3, 3) ::
+        Row(2, 2, 0, 1, 1, 1, 1, 3, 1, 3, 3, 2, 4, 4) ::
+        Row(3, 0, null, 1, 3, 0, 0, 0, null, 1, 3, 0, 2, 2) :: Nil)
   }
 
   test("test count") {

From a3989058c0938c8c59c278e7d1a766701cfa255b Mon Sep 17 00:00:00 2001
From: Bryan Cutler <bjcutler@us.ibm.com>
Date: Tue, 10 Nov 2015 16:32:32 -0800
Subject: [PATCH 611/896] [SPARK-10827][CORE] AppClient should not use
 `askWithReply` in `receiveAndReply`

Changed AppClient to be non-blocking in `receiveAndReply` by using a separate thread to wait for response and reply to the context.  The threads are managed by a thread pool.  Also added unit tests for the AppClient interface.

Author: Bryan Cutler <bjcutler@us.ibm.com>

Closes #9317 from BryanCutler/appClient-receiveAndReply-SPARK-10827.
---
 .../spark/deploy/client/AppClient.scala       |  33 ++-
 .../spark/deploy/client/AppClientSuite.scala  | 209 ++++++++++++++++++
 2 files changed, 238 insertions(+), 4 deletions(-)
 create mode 100644 core/src/test/scala/org/apache/spark/deploy/client/AppClientSuite.scala

diff --git a/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala b/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
index 25ea6925434a..3f29da663b79 100644
--- a/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
@@ -49,8 +49,8 @@ private[spark] class AppClient(
   private val REGISTRATION_TIMEOUT_SECONDS = 20
   private val REGISTRATION_RETRIES = 3
 
-  private var endpoint: RpcEndpointRef = null
-  private var appId: String = null
+  @volatile private var endpoint: RpcEndpointRef = null
+  @volatile private var appId: String = null
   @volatile private var registered = false
 
   private class ClientEndpoint(override val rpcEnv: RpcEnv) extends ThreadSafeRpcEndpoint
@@ -77,6 +77,11 @@ private[spark] class AppClient(
     private val registrationRetryThread =
       ThreadUtils.newDaemonSingleThreadScheduledExecutor("appclient-registration-retry-thread")
 
+    // A thread pool to perform receive then reply actions in a thread so as not to block the
+    // event loop.
+    private val askAndReplyThreadPool =
+      ThreadUtils.newDaemonCachedThreadPool("appclient-receive-and-reply-threadpool")
+
     override def onStart(): Unit = {
       try {
         registerWithMaster(1)
@@ -200,7 +205,7 @@ private[spark] class AppClient(
 
       case r: RequestExecutors =>
         master match {
-          case Some(m) => context.reply(m.askWithRetry[Boolean](r))
+          case Some(m) => askAndReplyAsync(m, context, r)
           case None =>
             logWarning("Attempted to request executors before registering with Master.")
             context.reply(false)
@@ -208,13 +213,32 @@ private[spark] class AppClient(
 
       case k: KillExecutors =>
         master match {
-          case Some(m) => context.reply(m.askWithRetry[Boolean](k))
+          case Some(m) => askAndReplyAsync(m, context, k)
           case None =>
             logWarning("Attempted to kill executors before registering with Master.")
             context.reply(false)
         }
     }
 
+    private def askAndReplyAsync[T](
+        endpointRef: RpcEndpointRef,
+        context: RpcCallContext,
+        msg: T): Unit = {
+      // Create a thread to ask a message and reply with the result.  Allow thread to be
+      // interrupted during shutdown, otherwise context must be notified of NonFatal errors.
+      askAndReplyThreadPool.execute(new Runnable {
+        override def run(): Unit = {
+          try {
+            context.reply(endpointRef.askWithRetry[Boolean](msg))
+          } catch {
+            case ie: InterruptedException => // Cancelled
+            case NonFatal(t) =>
+              context.sendFailure(t)
+          }
+        }
+      })
+    }
+
     override def onDisconnected(address: RpcAddress): Unit = {
       if (master.exists(_.address == address)) {
         logWarning(s"Connection to $address failed; waiting for master to reconnect...")
@@ -252,6 +276,7 @@ private[spark] class AppClient(
       registrationRetryThread.shutdownNow()
       registerMasterFutures.foreach(_.cancel(true))
       registerMasterThreadPool.shutdownNow()
+      askAndReplyThreadPool.shutdownNow()
     }
 
   }
diff --git a/core/src/test/scala/org/apache/spark/deploy/client/AppClientSuite.scala b/core/src/test/scala/org/apache/spark/deploy/client/AppClientSuite.scala
new file mode 100644
index 000000000000..1e5c05a73f8a
--- /dev/null
+++ b/core/src/test/scala/org/apache/spark/deploy/client/AppClientSuite.scala
@@ -0,0 +1,209 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.deploy.client
+
+import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
+import scala.concurrent.duration._
+
+import org.scalatest.BeforeAndAfterAll
+import org.scalatest.concurrent.Eventually._
+
+import org.apache.spark._
+import org.apache.spark.deploy.{ApplicationDescription, Command}
+import org.apache.spark.deploy.DeployMessages.{MasterStateResponse, RequestMasterState}
+import org.apache.spark.deploy.master.{ApplicationInfo, Master}
+import org.apache.spark.deploy.worker.Worker
+import org.apache.spark.rpc.RpcEnv
+import org.apache.spark.util.Utils
+
+/**
+ * End-to-end tests for application client in standalone mode.
+ */
+class AppClientSuite extends SparkFunSuite with LocalSparkContext with BeforeAndAfterAll {
+  private val numWorkers = 2
+  private val conf = new SparkConf()
+  private val securityManager = new SecurityManager(conf)
+
+  private var masterRpcEnv: RpcEnv = null
+  private var workerRpcEnvs: Seq[RpcEnv] = null
+  private var master: Master = null
+  private var workers: Seq[Worker] = null
+
+  /**
+   * Start the local cluster.
+   * Note: local-cluster mode is insufficient because we want a reference to the Master.
+   */
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+    masterRpcEnv = RpcEnv.create(Master.SYSTEM_NAME, "localhost", 0, conf, securityManager)
+    workerRpcEnvs = (0 until numWorkers).map { i =>
+      RpcEnv.create(Worker.SYSTEM_NAME + i, "localhost", 0, conf, securityManager)
+    }
+    master = makeMaster()
+    workers = makeWorkers(10, 2048)
+    // Wait until all workers register with master successfully
+    eventually(timeout(60.seconds), interval(10.millis)) {
+      assert(getMasterState.workers.size === numWorkers)
+    }
+  }
+
+  override def afterAll(): Unit = {
+    workerRpcEnvs.foreach(_.shutdown())
+    masterRpcEnv.shutdown()
+    workers.foreach(_.stop())
+    master.stop()
+    workerRpcEnvs = null
+    masterRpcEnv = null
+    workers = null
+    master = null
+    super.afterAll()
+  }
+
+  test("interface methods of AppClient using local Master") {
+    val ci = new AppClientInst(masterRpcEnv.address.toSparkURL)
+
+    ci.client.start()
+
+    // Client should connect with one Master which registers the application
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(ci.listener.connectedIdList.size === 1, "client listener should have one connection")
+      assert(apps.size === 1, "master should have 1 registered app")
+    }
+
+    // Send message to Master to request Executors, verify request by change in executor limit
+    val numExecutorsRequested = 1
+    assert(ci.client.requestTotalExecutors(numExecutorsRequested))
+
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.head.getExecutorLimit === numExecutorsRequested, s"executor request failed")
+    }
+
+    // Send request to kill executor, verify request was made
+    assert {
+      val apps = getApplications()
+      val executorId: String = apps.head.executors.head._2.fullId
+      ci.client.killExecutors(Seq(executorId))
+    }
+
+    // Issue stop command for Client to disconnect from Master
+    ci.client.stop()
+
+    // Verify Client is marked dead and unregistered from Master
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(ci.listener.deadReasonList.size === 1, "client should have been marked dead")
+      assert(apps.isEmpty, "master should have 0 registered apps")
+    }
+  }
+
+  test("request from AppClient before initialized with master") {
+    val ci = new AppClientInst(masterRpcEnv.address.toSparkURL)
+
+    // requests to master should fail immediately
+    assert(ci.client.requestTotalExecutors(3) === false)
+  }
+
+  // ===============================
+  // | Utility methods for testing |
+  // ===============================
+
+  /** Return a SparkConf for applications that want to talk to our Master. */
+  private def appConf: SparkConf = {
+    new SparkConf()
+      .setMaster(masterRpcEnv.address.toSparkURL)
+      .setAppName("test")
+      .set("spark.executor.memory", "256m")
+  }
+
+  /** Make a master to which our application will send executor requests. */
+  private def makeMaster(): Master = {
+    val master = new Master(masterRpcEnv, masterRpcEnv.address, 0, securityManager, conf)
+    masterRpcEnv.setupEndpoint(Master.ENDPOINT_NAME, master)
+    master
+  }
+
+  /** Make a few workers that talk to our master. */
+  private def makeWorkers(cores: Int, memory: Int): Seq[Worker] = {
+    (0 until numWorkers).map { i =>
+      val rpcEnv = workerRpcEnvs(i)
+      val worker = new Worker(rpcEnv, 0, cores, memory, Array(masterRpcEnv.address),
+        Worker.SYSTEM_NAME + i, Worker.ENDPOINT_NAME, null, conf, securityManager)
+      rpcEnv.setupEndpoint(Worker.ENDPOINT_NAME, worker)
+      worker
+    }
+  }
+
+  /** Get the Master state */
+  private def getMasterState: MasterStateResponse = {
+    master.self.askWithRetry[MasterStateResponse](RequestMasterState)
+  }
+
+  /** Get the applictions that are active from Master */
+  private def getApplications(): Seq[ApplicationInfo] = {
+    getMasterState.activeApps
+  }
+
+  /** Application Listener to collect events */
+  private class AppClientCollector extends AppClientListener with Logging {
+    val connectedIdList = new ArrayBuffer[String] with SynchronizedBuffer[String]
+    @volatile var disconnectedCount: Int = 0
+    val deadReasonList = new ArrayBuffer[String] with SynchronizedBuffer[String]
+    val execAddedList = new ArrayBuffer[String] with SynchronizedBuffer[String]
+    val execRemovedList = new ArrayBuffer[String] with SynchronizedBuffer[String]
+
+    def connected(id: String): Unit = {
+      connectedIdList += id
+    }
+
+    def disconnected(): Unit = {
+      synchronized {
+        disconnectedCount += 1
+      }
+    }
+
+    def dead(reason: String): Unit = {
+      deadReasonList += reason
+    }
+
+    def executorAdded(
+        id: String,
+        workerId: String,
+        hostPort: String,
+        cores: Int,
+        memory: Int): Unit = {
+      execAddedList += id
+    }
+
+    def executorRemoved(id: String, message: String, exitStatus: Option[Int]): Unit = {
+      execRemovedList += id
+    }
+  }
+
+  /** Create AppClient and supporting objects */
+  private class AppClientInst(masterUrl: String) {
+    val rpcEnv = RpcEnv.create("spark", Utils.localHostName(), 0, conf, securityManager)
+    private val cmd = new Command(TestExecutor.getClass.getCanonicalName.stripSuffix("$"),
+      List(), Map(), Seq(), Seq(), Seq())
+    private val desc = new ApplicationDescription("AppClientSuite", Some(1), 512, cmd, "ignored")
+    val listener = new AppClientCollector
+    val client = new AppClient(rpcEnv, Array(masterUrl), desc, listener, new SparkConf)
+  }
+
+}

From c0e48dfa611fa5d94132af7e6f6731f60ab833da Mon Sep 17 00:00:00 2001
From: Yu ISHIKAWA <yuu.ishikawa@gmail.com>
Date: Tue, 10 Nov 2015 16:42:28 -0800
Subject: [PATCH 612/896] [SPARK-11566] [MLLIB] [PYTHON] Refactoring
 GaussianMixtureModel.gaussians in Python

cc jkbradley

Author: Yu ISHIKAWA <yuu.ishikawa@gmail.com>

Closes #9534 from yu-iskw/SPARK-11566.
---
 .../python/GaussianMixtureModelWrapper.scala  | 21 ++++++-------------
 python/pyspark/mllib/clustering.py            |  2 +-
 2 files changed, 7 insertions(+), 16 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/api/python/GaussianMixtureModelWrapper.scala b/mllib/src/main/scala/org/apache/spark/mllib/api/python/GaussianMixtureModelWrapper.scala
index 0ec88ef77d69..6a3b20c88d2d 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/api/python/GaussianMixtureModelWrapper.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/api/python/GaussianMixtureModelWrapper.scala
@@ -17,14 +17,11 @@
 
 package org.apache.spark.mllib.api.python
 
-import java.util.{List => JList}
-
-import scala.collection.JavaConverters._
-import scala.collection.mutable.ArrayBuffer
+import scala.collection.JavaConverters
 
 import org.apache.spark.SparkContext
-import org.apache.spark.mllib.linalg.{Vector, Vectors, Matrix}
 import org.apache.spark.mllib.clustering.GaussianMixtureModel
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 
 /**
   * Wrapper around GaussianMixtureModel to provide helper methods in Python
@@ -36,17 +33,11 @@ private[python] class GaussianMixtureModelWrapper(model: GaussianMixtureModel) {
   /**
     * Returns gaussians as a List of Vectors and Matrices corresponding each MultivariateGaussian
     */
-  val gaussians: JList[Object] = {
-    val modelGaussians = model.gaussians
-    var i = 0
-    var mu = ArrayBuffer.empty[Vector]
-    var sigma = ArrayBuffer.empty[Matrix]
-    while (i < k) {
-      mu += modelGaussians(i).mu
-      sigma += modelGaussians(i).sigma
-      i += 1
+  val gaussians: Array[Byte] = {
+    val modelGaussians = model.gaussians.map { gaussian =>
+      Array[Any](gaussian.mu, gaussian.sigma)
     }
-    List(mu.toArray, sigma.toArray).map(_.asInstanceOf[Object]).asJava
+    SerDe.dumps(JavaConverters.seqAsJavaListConverter(modelGaussians).asJava)
   }
 
   def save(sc: SparkContext, path: String): Unit = model.save(sc, path)
diff --git a/python/pyspark/mllib/clustering.py b/python/pyspark/mllib/clustering.py
index 1fa061dc2da9..c9e6f1dec6bf 100644
--- a/python/pyspark/mllib/clustering.py
+++ b/python/pyspark/mllib/clustering.py
@@ -266,7 +266,7 @@ def gaussians(self):
         """
         return [
             MultivariateGaussian(gaussian[0], gaussian[1])
-            for gaussian in zip(*self.call("gaussians"))]
+            for gaussian in self.call("gaussians")]
 
     @property
     @since('1.4.0')

From 33112f9c48680c33d663978f76806ebf0ea39789 Mon Sep 17 00:00:00 2001
From: Imran Rashid <irashid@cloudera.com>
Date: Tue, 10 Nov 2015 16:50:22 -0800
Subject: [PATCH 613/896] [SPARK-10192][CORE] simple test w/ failure involving
 a shared dependency

just trying to increase test coverage in the scheduler, this already works.  It includes a regression test for SPARK-9809

copied some test utils from https://github.com/apache/spark/pull/5636, we can wait till that is merged first

Author: Imran Rashid <irashid@cloudera.com>

Closes #8402 from squito/test_retry_in_shared_shuffle_dep.
---
 .../spark/scheduler/DAGSchedulerSuite.scala   | 51 ++++++++++++++++++-
 1 file changed, 49 insertions(+), 2 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 3816b8c4a09a..068b49bd5844 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -594,11 +594,17 @@ class DAGSchedulerSuite
    * @param stageId - The current stageId
    * @param attemptIdx - The current attempt count
    */
-  private def completeNextResultStageWithSuccess(stageId: Int, attemptIdx: Int): Unit = {
+  private def completeNextResultStageWithSuccess(
+      stageId: Int,
+      attemptIdx: Int,
+      partitionToResult: Int => Int = _ => 42): Unit = {
     val stageAttempt = taskSets.last
     checkStageId(stageId, attemptIdx, stageAttempt)
     assert(scheduler.stageIdToStage(stageId).isInstanceOf[ResultStage])
-    complete(stageAttempt, stageAttempt.tasks.zipWithIndex.map(_ => (Success, 42)).toSeq)
+    val taskResults = stageAttempt.tasks.zipWithIndex.map { case (task, idx) =>
+      (Success, partitionToResult(idx))
+    }
+    complete(stageAttempt, taskResults.toSeq)
   }
 
   /**
@@ -1054,6 +1060,47 @@ class DAGSchedulerSuite
     assertDataStructuresEmpty()
   }
 
+  /**
+   * Run two jobs, with a shared dependency.  We simulate a fetch failure in the second job, which
+   * requires regenerating some outputs of the shared dependency.  One key aspect of this test is
+   * that the second job actually uses a different stage for the shared dependency (a "skipped"
+   * stage).
+   */
+  test("shuffle fetch failure in a reused shuffle dependency") {
+    // Run the first job successfully, which creates one shuffle dependency
+
+    val shuffleMapRdd = new MyRDD(sc, 2, Nil)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
+    submit(reduceRdd, Array(0, 1))
+
+    completeShuffleMapStageSuccessfully(0, 0, 2)
+    completeNextResultStageWithSuccess(1, 0)
+    assert(results === Map(0 -> 42, 1 -> 42))
+    assertDataStructuresEmpty()
+
+    // submit another job w/ the shared dependency, and have a fetch failure
+    val reduce2 = new MyRDD(sc, 2, List(shuffleDep))
+    submit(reduce2, Array(0, 1))
+    // Note that the stage numbering here is only b/c the shared dependency produces a new, skipped
+    // stage.  If instead it reused the existing stage, then this would be stage 2
+    completeNextStageWithFetchFailure(3, 0, shuffleDep)
+    scheduler.resubmitFailedStages()
+
+    // the scheduler now creates a new task set to regenerate the missing map output, but this time
+    // using a different stage, the "skipped" one
+
+    // SPARK-9809 -- this stage is submitted without a task for each partition (because some of
+    // the shuffle map output is still available from stage 0); make sure we've still got internal
+    // accumulators setup
+    assert(scheduler.stageIdToStage(2).internalAccumulators.nonEmpty)
+    completeShuffleMapStageSuccessfully(2, 0, 2)
+    completeNextResultStageWithSuccess(3, 1, idx => idx + 1234)
+    assert(results === Map(0 -> 1234, 1 -> 1235))
+
+    assertDataStructuresEmpty()
+  }
+
   /**
    * This test runs a three stage job, with a fetch failure in stage 1.  but during the retry, we
    * have completions from both the first & second attempt of stage 1.  So all the map output is

From 3e0a6cf1e02a19b37c68d3026415d53bb57a576b Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Tue, 10 Nov 2015 16:51:25 -0800
Subject: [PATCH 614/896] [SPARK-11572] Exit AsynchronousListenerBus thread
 when stop() is called

As vonnagy reported in the following thread:
http://search-hadoop.com/m/q3RTtk982kvIow22

Attempts to join the thread in AsynchronousListenerBus resulted in lock up because AsynchronousListenerBus thread was still getting messages `SparkListenerExecutorMetricsUpdate` from the DAGScheduler

Author: tedyu <yuzhihong@gmail.com>

Closes #9546 from ted-yu/master.
---
 .../org/apache/spark/util/AsynchronousListenerBus.scala  | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
index 61b5a4cecddc..b8481eabc761 100644
--- a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
+++ b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
@@ -67,15 +67,12 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
           processingEvent = true
         }
         try {
-          val event = eventQueue.poll
-          if (event == null) {
+          if (stopped.get()) {
             // Get out of the while loop and shutdown the daemon thread
-            if (!stopped.get) {
-              throw new IllegalStateException("Polling `null` from eventQueue means" +
-                " the listener bus has been stopped. So `stopped` must be true")
-            }
             return
           }
+          val event = eventQueue.poll
+          assert(event != null, "event queue was empty but the listener bus was not stopped")
           postToAll(event)
         } finally {
           self.synchronized {

From 900917541651abe7125f0d205085d2ab6a00d92c Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Tue, 10 Nov 2015 16:52:26 -0800
Subject: [PATCH 615/896] [SPARK-11615] Drop @VisibleForTesting annotation

See http://search-hadoop.com/m/q3RTtjpe8r1iRbTj2 for discussion.

Summary: addition of VisibleForTesting annotation resulted in spark-shell malfunctioning.

Author: tedyu <yuzhihong@gmail.com>

Closes #9585 from tedyu/master.
---
 .../src/main/scala/org/apache/spark/rpc/netty/Inbox.scala | 8 ++++----
 .../org/apache/spark/ui/jobs/JobProgressListener.scala    | 2 --
 .../org/apache/spark/util/AsynchronousListenerBus.scala   | 5 ++---
 .../org/apache/spark/util/collection/ExternalSorter.scala | 3 +--
 scalastyle-config.xml                                     | 7 +++++++
 .../org/apache/spark/sql/execution/QueryExecution.scala   | 3 ---
 .../spark/network/shuffle/ShuffleTestAccessor.scala       | 1 -
 7 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
index c72b588db57f..464027f07cc8 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/Inbox.scala
@@ -21,8 +21,6 @@ import javax.annotation.concurrent.GuardedBy
 
 import scala.util.control.NonFatal
 
-import com.google.common.annotations.VisibleForTesting
-
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.rpc.{RpcAddress, RpcEndpoint, ThreadSafeRpcEndpoint}
 
@@ -193,8 +191,10 @@ private[netty] class Inbox(
 
   def isEmpty: Boolean = inbox.synchronized { messages.isEmpty }
 
-  /** Called when we are dropping a message. Test cases override this to test message dropping. */
-  @VisibleForTesting
+  /**
+   * Called when we are dropping a message. Test cases override this to test message dropping.
+   * Exposed for testing.
+   */
   protected def onDrop(message: InboxMessage): Unit = {
     logWarning(s"Drop $message because $endpointRef is stopped")
   }
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
index 77d034fa5ba2..ca37829216f2 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/JobProgressListener.scala
@@ -21,8 +21,6 @@ import java.util.concurrent.TimeoutException
 
 import scala.collection.mutable.{HashMap, HashSet, ListBuffer}
 
-import com.google.common.annotations.VisibleForTesting
-
 import org.apache.spark._
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.executor.TaskMetrics
diff --git a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
index b8481eabc761..b3b54af972cb 100644
--- a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
+++ b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
@@ -20,7 +20,6 @@ package org.apache.spark.util
 import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicBoolean
 
-import com.google.common.annotations.VisibleForTesting
 import org.apache.spark.SparkContext
 
 /**
@@ -119,8 +118,8 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
    * For testing only. Wait until there are no more events in the queue, or until the specified
    * time has elapsed. Throw `TimeoutException` if the specified time elapsed before the queue
    * emptied.
+   * Exposed for testing.
    */
-  @VisibleForTesting
   @throws(classOf[TimeoutException])
   def waitUntilEmpty(timeoutMillis: Long): Unit = {
     val finishTime = System.currentTimeMillis + timeoutMillis
@@ -137,8 +136,8 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
 
   /**
    * For testing only. Return whether the listener daemon thread is still alive.
+   * Exposed for testing.
    */
-  @VisibleForTesting
   def listenerThreadIsAlive: Boolean = listenerThread.isAlive
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index a44e72b7c16d..bd6844d045ca 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -23,7 +23,6 @@ import java.util.Comparator
 import scala.collection.mutable.ArrayBuffer
 import scala.collection.mutable
 
-import com.google.common.annotations.VisibleForTesting
 import com.google.common.io.ByteStreams
 
 import org.apache.spark._
@@ -608,8 +607,8 @@ private[spark] class ExternalSorter[K, V, C](
    *
    * For now, we just merge all the spilled files in once pass, but this can be modified to
    * support hierarchical merging.
+   * Exposed for testing.
    */
-  @VisibleForTesting
   def partitionedIterator: Iterator[(Int, Iterator[Product2[K, C]])] = {
     val usingMap = aggregator.isDefined
     val collection: WritablePartitionedPairCollection[K, C] = if (usingMap) map else buffer
diff --git a/scalastyle-config.xml b/scalastyle-config.xml
index 64a0c71bbef2..050c3f360476 100644
--- a/scalastyle-config.xml
+++ b/scalastyle-config.xml
@@ -150,6 +150,13 @@ This file is divided into 3 sections:
       // scalastyle:on println]]></customMessage>
   </check>
 
+  <check customId="visiblefortesting" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
+    <parameters><parameter name="regex">@VisibleForTesting</parameter></parameters>
+    <customMessage><![CDATA[
+      @VisibleForTesting auses classpath issues. Please note this in the java doc instead (SPARK-11615).
+    ]]></customMessage>
+  </check>
+
   <check customId="classforname" level="error" class="org.scalastyle.file.RegexChecker" enabled="true">
     <parameters><parameter name="regex">Class\.forName</parameter></parameters>
     <customMessage><![CDATA[
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
index c2142d03f422..77843f53b9bd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.execution
 
-import com.google.common.annotations.VisibleForTesting
-
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.catalyst.InternalRow
@@ -33,7 +31,6 @@ import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
  */
 class QueryExecution(val sqlContext: SQLContext, val logical: LogicalPlan) {
 
-  @VisibleForTesting
   def assertAnalyzed(): Unit = sqlContext.analyzer.checkAnalysis(analyzed)
 
   lazy val analyzed: LogicalPlan = sqlContext.analyzer.execute(logical)
diff --git a/yarn/src/test/scala/org/apache/spark/network/shuffle/ShuffleTestAccessor.scala b/yarn/src/test/scala/org/apache/spark/network/shuffle/ShuffleTestAccessor.scala
index aa46ec5100f0..94bf579dc824 100644
--- a/yarn/src/test/scala/org/apache/spark/network/shuffle/ShuffleTestAccessor.scala
+++ b/yarn/src/test/scala/org/apache/spark/network/shuffle/ShuffleTestAccessor.scala
@@ -19,7 +19,6 @@ package org.apache.spark.network.shuffle
 import java.io.{IOException, File}
 import java.util.concurrent.ConcurrentMap
 
-import com.google.common.annotations.VisibleForTesting
 import org.apache.hadoop.yarn.api.records.ApplicationId
 import org.fusesource.leveldbjni.JniDBFactory
 import org.iq80.leveldb.{DB, Options}

From 6600786dddc89cb16779ee56b9173f63a3af3f27 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Tue, 10 Nov 2015 16:54:06 -0800
Subject: [PATCH 616/896] [SPARK-11361][STREAMING] Show scopes of RDD
 operations inside DStream.foreachRDD and DStream.transform in DAG viz

Currently, when a DStream sets the scope for RDD generated by it, that scope is not allowed to be overridden by the RDD operations. So in case of `DStream.foreachRDD`, all the RDDs generated inside the foreachRDD get the same scope - `foreachRDD  <time>`, as set by the `ForeachDStream`. So it is hard to debug generated RDDs in the RDD DAG viz in the Spark UI.

This patch allows the RDD operations inside `DStream.transform` and `DStream.foreachRDD` to append their own scopes to the earlier DStream scope.

I have also slightly tweaked how callsites are set such that the short callsite reflects the RDD operation name and line number. This tweak is necessary as callsites are not managed through scopes (which support nesting and overriding) and I didnt want to add another local property to control nesting and overriding of callsites.

## Before:
![image](https://cloud.githubusercontent.com/assets/663212/10808548/fa71c0c4-7da9-11e5-9af0-5737793a146f.png)

## After:
![image](https://cloud.githubusercontent.com/assets/663212/10808659/37bc45b6-7dab-11e5-8041-c20be6a9bc26.png)

The code that was used to generate this is:
```
    val lines = ssc.socketTextStream(args(0), args(1).toInt, StorageLevel.MEMORY_AND_DISK_SER)
    val words = lines.flatMap(_.split(" "))
    val wordCounts = words.map(x => (x, 1)).reduceByKey(_ + _)
    wordCounts.foreachRDD { rdd =>
      val temp = rdd.map { _ -> 1 }.reduceByKey( _ + _)
      val temp2 = temp.map { _ -> 1}.reduceByKey(_ + _)
      val count = temp2.count
      println(count)
    }
```

Note
- The inner scopes of the RDD operations map/reduceByKey inside foreachRDD is visible
- The short callsites of stages refers to the line number of the RDD ops rather than the same line number of foreachRDD in all three cases.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9315 from tdas/SPARK-11361.
---
 .../scala/org/apache/spark/SparkContext.scala |  9 ++-
 .../spark/streaming/TestOutputStream.scala    |  2 +-
 .../spark/streaming/dstream/DStream.scala     | 63 +++++++++++++---
 .../streaming/dstream/ForEachDStream.scala    | 14 +++-
 .../dstream/TransformedDStream.scala          | 13 ++++
 .../spark/streaming/DStreamScopeSuite.scala   | 75 ++++++++++++++++---
 .../spark/streaming/TestSuiteBase.scala       |  4 +-
 7 files changed, 147 insertions(+), 33 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 7421821e2601..67270c38fa1b 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1787,10 +1787,11 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
    * has overridden the call site using `setCallSite()`, this will return the user's version.
    */
   private[spark] def getCallSite(): CallSite = {
-    Option(getLocalProperty(CallSite.SHORT_FORM)).map { case shortCallSite =>
-      val longCallSite = Option(getLocalProperty(CallSite.LONG_FORM)).getOrElse("")
-      CallSite(shortCallSite, longCallSite)
-    }.getOrElse(Utils.getCallSite())
+    val callSite = Utils.getCallSite()
+    CallSite(
+      Option(getLocalProperty(CallSite.SHORT_FORM)).getOrElse(callSite.shortForm),
+      Option(getLocalProperty(CallSite.LONG_FORM)).getOrElse(callSite.longForm)
+    )
   }
 
   /**
diff --git a/external/flume/src/test/scala/org/apache/spark/streaming/TestOutputStream.scala b/external/flume/src/test/scala/org/apache/spark/streaming/TestOutputStream.scala
index 1a900007b696..79077e4a49e1 100644
--- a/external/flume/src/test/scala/org/apache/spark/streaming/TestOutputStream.scala
+++ b/external/flume/src/test/scala/org/apache/spark/streaming/TestOutputStream.scala
@@ -37,7 +37,7 @@ class TestOutputStream[T: ClassTag](parent: DStream[T],
   extends ForEachDStream[T](parent, (rdd: RDD[T], t: Time) => {
     val collected = rdd.collect()
     output += collected
-  }) {
+  }, false) {
 
   // This is to clear the output buffer every it is read from a checkpoint
   @throws(classOf[IOException])
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala
index 1da0b0a54df0..1a6edf9473d8 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/DStream.scala
@@ -341,7 +341,7 @@ abstract class DStream[T: ClassTag] (
       // of RDD generation, else generate nothing.
       if (isTimeValid(time)) {
 
-        val rddOption = createRDDWithLocalProperties(time) {
+        val rddOption = createRDDWithLocalProperties(time, displayInnerRDDOps = false) {
           // Disable checks for existing output directories in jobs launched by the streaming
           // scheduler, since we may need to write output to an existing directory during checkpoint
           // recovery; see SPARK-4835 for more details. We need to have this call here because
@@ -373,27 +373,52 @@ abstract class DStream[T: ClassTag] (
   /**
    * Wrap a body of code such that the call site and operation scope
    * information are passed to the RDDs created in this body properly.
-   */
-  protected def createRDDWithLocalProperties[U](time: Time)(body: => U): U = {
+   * @param body RDD creation code to execute with certain local properties.
+   * @param time Current batch time that should be embedded in the scope names
+   * @param displayInnerRDDOps Whether the detailed callsites and scopes of the inner RDDs generated
+   *                           by `body` will be displayed in the UI; only the scope and callsite
+   *                           of the DStream operation that generated `this` will be displayed.
+   */
+  protected[streaming] def createRDDWithLocalProperties[U](
+      time: Time,
+      displayInnerRDDOps: Boolean)(body: => U): U = {
     val scopeKey = SparkContext.RDD_SCOPE_KEY
     val scopeNoOverrideKey = SparkContext.RDD_SCOPE_NO_OVERRIDE_KEY
     // Pass this DStream's operation scope and creation site information to RDDs through
     // thread-local properties in our SparkContext. Since this method may be called from another
     // DStream, we need to temporarily store any old scope and creation site information to
     // restore them later after setting our own.
-    val prevCallSite = ssc.sparkContext.getCallSite()
+    val prevCallSite = CallSite(
+      ssc.sparkContext.getLocalProperty(CallSite.SHORT_FORM),
+      ssc.sparkContext.getLocalProperty(CallSite.LONG_FORM)
+    )
     val prevScope = ssc.sparkContext.getLocalProperty(scopeKey)
     val prevScopeNoOverride = ssc.sparkContext.getLocalProperty(scopeNoOverrideKey)
 
     try {
-      ssc.sparkContext.setCallSite(creationSite)
+      if (displayInnerRDDOps) {
+        // Unset the short form call site, so that generated RDDs get their own
+        ssc.sparkContext.setLocalProperty(CallSite.SHORT_FORM, null)
+        ssc.sparkContext.setLocalProperty(CallSite.LONG_FORM, null)
+      } else {
+        // Set the callsite, so that the generated RDDs get the DStream's call site and
+        // the internal RDD call sites do not get displayed
+        ssc.sparkContext.setCallSite(creationSite)
+      }
+
       // Use the DStream's base scope for this RDD so we can (1) preserve the higher level
       // DStream operation name, and (2) share this scope with other DStreams created in the
       // same operation. Disallow nesting so that low-level Spark primitives do not show up.
       // TODO: merge callsites with scopes so we can just reuse the code there
       makeScope(time).foreach { s =>
         ssc.sparkContext.setLocalProperty(scopeKey, s.toJson)
-        ssc.sparkContext.setLocalProperty(scopeNoOverrideKey, "true")
+        if (displayInnerRDDOps) {
+          // Allow inner RDDs to add inner scopes
+          ssc.sparkContext.setLocalProperty(scopeNoOverrideKey, null)
+        } else {
+          // Do not allow inner RDDs to override the scope set by DStream
+          ssc.sparkContext.setLocalProperty(scopeNoOverrideKey, "true")
+        }
       }
 
       body
@@ -628,7 +653,7 @@ abstract class DStream[T: ClassTag] (
    */
   def foreachRDD(foreachFunc: RDD[T] => Unit): Unit = ssc.withScope {
     val cleanedF = context.sparkContext.clean(foreachFunc, false)
-    this.foreachRDD((r: RDD[T], t: Time) => cleanedF(r))
+    foreachRDD((r: RDD[T], t: Time) => cleanedF(r), displayInnerRDDOps = true)
   }
 
   /**
@@ -639,7 +664,23 @@ abstract class DStream[T: ClassTag] (
     // because the DStream is reachable from the outer object here, and because
     // DStreams can't be serialized with closures, we can't proactively check
     // it for serializability and so we pass the optional false to SparkContext.clean
-    new ForEachDStream(this, context.sparkContext.clean(foreachFunc, false)).register()
+    foreachRDD(foreachFunc, displayInnerRDDOps = true)
+  }
+
+  /**
+   * Apply a function to each RDD in this DStream. This is an output operator, so
+   * 'this' DStream will be registered as an output stream and therefore materialized.
+   * @param foreachFunc foreachRDD function
+   * @param displayInnerRDDOps Whether the detailed callsites and scopes of the RDDs generated
+   *                           in the `foreachFunc` to be displayed in the UI. If `false`, then
+   *                           only the scopes and callsites of `foreachRDD` will override those
+   *                           of the RDDs on the display.
+   */
+  private def foreachRDD(
+      foreachFunc: (RDD[T], Time) => Unit,
+      displayInnerRDDOps: Boolean): Unit = {
+    new ForEachDStream(this,
+      context.sparkContext.clean(foreachFunc, false), displayInnerRDDOps).register()
   }
 
   /**
@@ -730,7 +771,7 @@ abstract class DStream[T: ClassTag] (
         // scalastyle:on println
       }
     }
-    new ForEachDStream(this, context.sparkContext.clean(foreachFunc)).register()
+    foreachRDD(context.sparkContext.clean(foreachFunc), displayInnerRDDOps = false)
   }
 
   /**
@@ -900,7 +941,7 @@ abstract class DStream[T: ClassTag] (
       val file = rddToFileName(prefix, suffix, time)
       rdd.saveAsObjectFile(file)
     }
-    this.foreachRDD(saveFunc)
+    this.foreachRDD(saveFunc, displayInnerRDDOps = false)
   }
 
   /**
@@ -913,7 +954,7 @@ abstract class DStream[T: ClassTag] (
       val file = rddToFileName(prefix, suffix, time)
       rdd.saveAsTextFile(file)
     }
-    this.foreachRDD(saveFunc)
+    this.foreachRDD(saveFunc, displayInnerRDDOps = false)
   }
 
   /**
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/ForEachDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/ForEachDStream.scala
index c109ceccc698..4410a9977c87 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/ForEachDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/ForEachDStream.scala
@@ -22,10 +22,19 @@ import org.apache.spark.streaming.{Duration, Time}
 import org.apache.spark.streaming.scheduler.Job
 import scala.reflect.ClassTag
 
+/**
+ * An internal DStream used to represent output operations like DStream.foreachRDD.
+ * @param parent        Parent DStream
+ * @param foreachFunc   Function to apply on each RDD generated by the parent DStream
+ * @param displayInnerRDDOps Whether the detailed callsites and scopes of the RDDs generated
+ *                           by `foreachFunc` will be displayed in the UI; only the scope and
+ *                           callsite of `DStream.foreachRDD` will be displayed.
+ */
 private[streaming]
 class ForEachDStream[T: ClassTag] (
     parent: DStream[T],
-    foreachFunc: (RDD[T], Time) => Unit
+    foreachFunc: (RDD[T], Time) => Unit,
+    displayInnerRDDOps: Boolean
   ) extends DStream[Unit](parent.ssc) {
 
   override def dependencies: List[DStream[_]] = List(parent)
@@ -37,8 +46,7 @@ class ForEachDStream[T: ClassTag] (
   override def generateJob(time: Time): Option[Job] = {
     parent.getOrCompute(time) match {
       case Some(rdd) =>
-        val jobFunc = () => createRDDWithLocalProperties(time) {
-          ssc.sparkContext.setCallSite(creationSite)
+        val jobFunc = () => createRDDWithLocalProperties(time, displayInnerRDDOps) {
           foreachFunc(rdd, time)
         }
         Some(new Job(time, jobFunc))
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
index 5eabdf63dc8d..080bc873fa0a 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TransformedDStream.scala
@@ -51,4 +51,17 @@ class TransformedDStream[U: ClassTag] (
     }
     Some(transformedRDD)
   }
+
+  /**
+   * Wrap a body of code such that the call site and operation scope
+   * information are passed to the RDDs created in this body properly.
+   * This has been overriden to make sure that `displayInnerRDDOps` is always `true`, that is,
+   * the inner scopes and callsites of RDDs generated in `DStream.transform` are always
+   * displayed in the UI.
+   */
+  override protected[streaming] def createRDDWithLocalProperties[U](
+      time: Time,
+      displayInnerRDDOps: Boolean)(body: => U): U = {
+    super.createRDDWithLocalProperties(time, displayInnerRDDOps = true)(body)
+  }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/DStreamScopeSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/DStreamScopeSuite.scala
index 8844c9d74b93..bc223e648a41 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/DStreamScopeSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/DStreamScopeSuite.scala
@@ -17,12 +17,15 @@
 
 package org.apache.spark.streaming
 
+import scala.collection.mutable.ArrayBuffer
+
 import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll}
 
-import org.apache.spark.{SparkContext, SparkFunSuite}
-import org.apache.spark.rdd.RDDOperationScope
+import org.apache.spark.rdd.{RDD, RDDOperationScope}
 import org.apache.spark.streaming.dstream.DStream
 import org.apache.spark.streaming.ui.UIUtils
+import org.apache.spark.util.ManualClock
+import org.apache.spark.{SparkConf, SparkContext, SparkFunSuite}
 
 /**
  * Tests whether scope information is passed from DStream operations to RDDs correctly.
@@ -32,7 +35,9 @@ class DStreamScopeSuite extends SparkFunSuite with BeforeAndAfter with BeforeAnd
   private val batchDuration: Duration = Seconds(1)
 
   override def beforeAll(): Unit = {
-    ssc = new StreamingContext(new SparkContext("local", "test"), batchDuration)
+    val conf = new SparkConf().setMaster("local").setAppName("test")
+    conf.set("spark.streaming.clock", classOf[ManualClock].getName())
+    ssc = new StreamingContext(new SparkContext(conf), batchDuration)
   }
 
   override def afterAll(): Unit = {
@@ -103,6 +108,8 @@ class DStreamScopeSuite extends SparkFunSuite with BeforeAndAfter with BeforeAnd
 
   test("scoping nested operations") {
     val inputStream = new DummyInputDStream(ssc)
+    // countByKeyAndWindow internally uses reduceByKeyAndWindow, but only countByKeyAndWindow
+    // should appear in scope
     val countStream = inputStream.countByWindow(Seconds(10), Seconds(1))
     countStream.initialize(Time(0))
 
@@ -137,6 +144,57 @@ class DStreamScopeSuite extends SparkFunSuite with BeforeAndAfter with BeforeAnd
     testStream(countStream)
   }
 
+  test("transform should allow RDD operations to be captured in scopes") {
+    val inputStream = new DummyInputDStream(ssc)
+    val transformedStream = inputStream.transform { _.map { _ -> 1}.reduceByKey(_ + _) }
+    transformedStream.initialize(Time(0))
+
+    val transformScopeBase = transformedStream.baseScope.map(RDDOperationScope.fromJson)
+    val transformScope1 = transformedStream.getOrCompute(Time(1000)).get.scope
+    val transformScope2 = transformedStream.getOrCompute(Time(2000)).get.scope
+    val transformScope3 = transformedStream.getOrCompute(Time(3000)).get.scope
+
+    // Assert that all children RDDs inherit the DStream operation name correctly
+    assertDefined(transformScopeBase, transformScope1, transformScope2, transformScope3)
+    assert(transformScopeBase.get.name === "transform")
+    assertNestedScopeCorrect(transformScope1.get, 1000)
+    assertNestedScopeCorrect(transformScope2.get, 2000)
+    assertNestedScopeCorrect(transformScope3.get, 3000)
+
+    def assertNestedScopeCorrect(rddScope: RDDOperationScope, batchTime: Long): Unit = {
+      assert(rddScope.name === "reduceByKey")
+      assert(rddScope.parent.isDefined)
+      assertScopeCorrect(transformScopeBase.get, rddScope.parent.get, batchTime)
+    }
+  }
+
+  test("foreachRDD should allow RDD operations to be captured in scope") {
+    val inputStream = new DummyInputDStream(ssc)
+    val generatedRDDs = new ArrayBuffer[RDD[(Int, Int)]]
+    inputStream.foreachRDD { rdd =>
+      generatedRDDs += rdd.map { _ -> 1}.reduceByKey(_ + _)
+    }
+    val batchCounter = new BatchCounter(ssc)
+    ssc.start()
+    val clock = ssc.scheduler.clock.asInstanceOf[ManualClock]
+    clock.advance(3000)
+    batchCounter.waitUntilBatchesCompleted(3, 10000)
+    assert(generatedRDDs.size === 3)
+
+    val foreachBaseScope =
+      ssc.graph.getOutputStreams().head.baseScope.map(RDDOperationScope.fromJson)
+    assertDefined(foreachBaseScope)
+    assert(foreachBaseScope.get.name === "foreachRDD")
+
+    val rddScopes = generatedRDDs.map { _.scope }
+    assertDefined(rddScopes: _*)
+    rddScopes.zipWithIndex.foreach { case (rddScope, idx) =>
+      assert(rddScope.get.name === "reduceByKey")
+      assert(rddScope.get.parent.isDefined)
+      assertScopeCorrect(foreachBaseScope.get, rddScope.get.parent.get, (idx + 1) * 1000)
+    }
+  }
+
   /** Assert that the RDD operation scope properties are not set in our SparkContext. */
   private def assertPropertiesNotSet(): Unit = {
     assert(ssc != null)
@@ -149,19 +207,12 @@ class DStreamScopeSuite extends SparkFunSuite with BeforeAndAfter with BeforeAnd
       baseScope: RDDOperationScope,
       rddScope: RDDOperationScope,
       batchTime: Long): Unit = {
-    assertScopeCorrect(baseScope.id, baseScope.name, rddScope, batchTime)
-  }
-
-  /** Assert that the given RDD scope inherits the base name and ID correctly. */
-  private def assertScopeCorrect(
-      baseScopeId: String,
-      baseScopeName: String,
-      rddScope: RDDOperationScope,
-      batchTime: Long): Unit = {
+    val (baseScopeId, baseScopeName) = (baseScope.id, baseScope.name)
     val formattedBatchTime = UIUtils.formatBatchTime(
       batchTime, ssc.graph.batchDuration.milliseconds, showYYYYMMSS = false)
     assert(rddScope.id === s"${baseScopeId}_$batchTime")
     assert(rddScope.name.replaceAll("\\n", " ") === s"$baseScopeName @ $formattedBatchTime")
+    assert(rddScope.parent.isEmpty)  // There should not be any higher scope
   }
 
   /** Assert that all the specified options are defined. */
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/TestSuiteBase.scala b/streaming/src/test/scala/org/apache/spark/streaming/TestSuiteBase.scala
index 0d58a7b54412..a45c92d9c7bc 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/TestSuiteBase.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/TestSuiteBase.scala
@@ -98,7 +98,7 @@ class TestOutputStream[T: ClassTag](
   ) extends ForEachDStream[T](parent, (rdd: RDD[T], t: Time) => {
     val collected = rdd.collect()
     output += collected
-  }) {
+  }, false) {
 
   // This is to clear the output buffer every it is read from a checkpoint
   @throws(classOf[IOException])
@@ -122,7 +122,7 @@ class TestOutputStreamWithPartitions[T: ClassTag](
   extends ForEachDStream[T](parent, (rdd: RDD[T], t: Time) => {
     val collected = rdd.glom().collect().map(_.toSeq)
     output += collected
-  }) {
+  }, false) {
 
   // This is to clear the output buffer every it is read from a checkpoint
   @throws(classOf[IOException])

From 12c7635dc025239d3b69b9adef2f4eebb28edf48 Mon Sep 17 00:00:00 2001
From: Forest Fang <saurfang@users.noreply.github.com>
Date: Tue, 10 Nov 2015 16:55:58 -0800
Subject: [PATCH 617/896] [MINOR] Fix typo in AggregationQuerySuite.scala

Author: Forest Fang <saurfang@users.noreply.github.com>

Closes #9357 from saurfang/patch-1.
---
 .../spark/sql/hive/execution/AggregationQuerySuite.scala      | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 8253921563b3..22d2aefd699b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -795,14 +795,14 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
       val df = sqlContext.createDataFrame(rdd, schema)
 
       val allColumns = df.schema.fields.map(f => col(f.name))
-      val expectedAnaswer =
+      val expectedAnswer =
         data
           .find(r => r.getInt(0) == 50)
           .getOrElse(fail("A row with id 50 should be the expected answer."))
       checkAnswer(
         df.groupBy().agg(udaf(allColumns: _*)),
         // udaf returns a Row as the output value.
-        Row(expectedAnaswer)
+        Row(expectedAnswer)
       )
     }
   }

From 745e45d5ff7fe251c0d5197b7e08b1f80807b005 Mon Sep 17 00:00:00 2001
From: Marc Prud'hommeaux <mwp1@cornell.edu>
Date: Tue, 10 Nov 2015 16:57:08 -0800
Subject: [PATCH 618/896] [MINOR] License header formatting fix

The header wasn't indented properly.

Author: Marc Prud'hommeaux <mwp1@cornell.edu>

Closes #9312 from mprudhom/patch-1.
---
 .../datasources/jdbc/DefaultSource.scala      | 30 +++++++++----------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/DefaultSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/DefaultSource.scala
index 6773afc794f9..f522303be94a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/DefaultSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/DefaultSource.scala
@@ -1,19 +1,19 @@
 /*
-* Licensed to the Apache Software Foundation (ASF) under one or more
-* contributor license agreements.  See the NOTICE file distributed with
-* this work for additional information regarding copyright ownership.
-* The ASF licenses this file to You under the Apache License, Version 2.0
-* (the "License"); you may not use this file except in compliance with
-* the License.  You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 package org.apache.spark.sql.execution.datasources.jdbc
 

From 6e101d2e9d6e08a6a63f7065c1e87a5338f763ea Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 10 Nov 2015 18:45:48 -0800
Subject: [PATCH 619/896] [SPARK-6726][ML] Import/export for spark.ml
 LogisticRegressionModel

This PR adds model save/load for spark.ml's LogisticRegressionModel.  It also does minor refactoring of the default save/load classes to reuse code.

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9606 from jkbradley/logreg-io2.
---
 .../classification/LogisticRegression.scala   | 68 ++++++++++++++++-
 .../org/apache/spark/ml/util/ReadWrite.scala  | 74 +++++++++++++++++--
 .../LogisticRegressionSuite.scala             | 17 ++++-
 .../spark/ml/util/DefaultReadWriteTest.scala  |  4 +-
 4 files changed, 152 insertions(+), 11 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index f5fca686df14..a88f52674102 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -21,13 +21,14 @@ import scala.collection.mutable
 
 import breeze.linalg.{DenseVector => BDV}
 import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS, OWLQN => BreezeOWLQN}
+import org.apache.hadoop.fs.Path
 
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.linalg.BLAS._
 import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
@@ -396,7 +397,7 @@ class LogisticRegressionModel private[ml] (
     val coefficients: Vector,
     val intercept: Double)
   extends ProbabilisticClassificationModel[Vector, LogisticRegressionModel]
-  with LogisticRegressionParams {
+  with LogisticRegressionParams with Writable {
 
   @deprecated("Use coefficients instead.", "1.6.0")
   def weights: Vector = coefficients
@@ -510,8 +511,71 @@ class LogisticRegressionModel private[ml] (
     // Note: We should use getThreshold instead of $(threshold) since getThreshold is overridden.
     if (probability(1) > getThreshold) 1 else 0
   }
+
+  /**
+   * Returns a [[Writer]] instance for this ML instance.
+   *
+   * For [[LogisticRegressionModel]], this does NOT currently save the training [[summary]].
+   * An option to save [[summary]] may be added in the future.
+   */
+  override def write: Writer = new LogisticRegressionWriter(this)
+}
+
+
+/** [[Writer]] instance for [[LogisticRegressionModel]] */
+private[classification] class LogisticRegressionWriter(instance: LogisticRegressionModel)
+  extends Writer with Logging {
+
+  private case class Data(
+      numClasses: Int,
+      numFeatures: Int,
+      intercept: Double,
+      coefficients: Vector)
+
+  override protected def saveImpl(path: String): Unit = {
+    // Save metadata and Params
+    DefaultParamsWriter.saveMetadata(instance, path, sc)
+    // Save model data: numClasses, numFeatures, intercept, coefficients
+    val data = Data(instance.numClasses, instance.numFeatures, instance.intercept,
+      instance.coefficients)
+    val dataPath = new Path(path, "data").toString
+    sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
+  }
+}
+
+
+object LogisticRegressionModel extends Readable[LogisticRegressionModel] {
+
+  override def read: Reader[LogisticRegressionModel] = new LogisticRegressionReader
+
+  override def load(path: String): LogisticRegressionModel = read.load(path)
 }
 
+
+private[classification] class LogisticRegressionReader extends Reader[LogisticRegressionModel] {
+
+  /** Checked against metadata when loading model */
+  private val className = "org.apache.spark.ml.classification.LogisticRegressionModel"
+
+  override def load(path: String): LogisticRegressionModel = {
+    val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+    val dataPath = new Path(path, "data").toString
+    val data = sqlContext.read.format("parquet").load(dataPath)
+      .select("numClasses", "numFeatures", "intercept", "coefficients").head()
+    // We will need numClasses, numFeatures in the future for multinomial logreg support.
+    // val numClasses = data.getInt(0)
+    // val numFeatures = data.getInt(1)
+    val intercept = data.getDouble(2)
+    val coefficients = data.getAs[Vector](3)
+    val model = new LogisticRegressionModel(metadata.uid, coefficients, intercept)
+
+    DefaultParamsReader.getAndSetParams(model, metadata)
+    model
+  }
+}
+
+
 /**
  * MultiClassSummarizer computes the number of distinct labels and corresponding counts,
  * and validates the data to see if the labels used for k class multi-label classification
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index cbdf913ba8df..85f888c9f2f6 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -175,6 +175,21 @@ trait Readable[T] {
 private[ml] class DefaultParamsWriter(instance: Params) extends Writer {
 
   override protected def saveImpl(path: String): Unit = {
+    DefaultParamsWriter.saveMetadata(instance, path, sc)
+  }
+}
+
+private[ml] object DefaultParamsWriter {
+
+  /**
+   * Saves metadata + Params to: path + "/metadata"
+   *  - class
+   *  - timestamp
+   *  - sparkVersion
+   *  - uid
+   *  - paramMap
+   */
+  def saveMetadata(instance: Params, path: String, sc: SparkContext): Unit = {
     val uid = instance.uid
     val cls = instance.getClass.getName
     val params = instance.extractParamMap().toSeq.asInstanceOf[Seq[ParamPair[Any]]]
@@ -201,14 +216,61 @@ private[ml] class DefaultParamsWriter(instance: Params) extends Writer {
 private[ml] class DefaultParamsReader[T] extends Reader[T] {
 
   override def load(path: String): T = {
-    implicit val format = DefaultFormats
+    val metadata = DefaultParamsReader.loadMetadata(path, sc)
+    val cls = Utils.classForName(metadata.className)
+    val instance =
+      cls.getConstructor(classOf[String]).newInstance(metadata.uid).asInstanceOf[Params]
+    DefaultParamsReader.getAndSetParams(instance, metadata)
+    instance.asInstanceOf[T]
+  }
+}
+
+private[ml] object DefaultParamsReader {
+
+  /**
+   * All info from metadata file.
+   * @param params  paramMap, as a [[JValue]]
+   * @param metadataStr  Full metadata file String (for debugging)
+   */
+  case class Metadata(
+      className: String,
+      uid: String,
+      timestamp: Long,
+      sparkVersion: String,
+      params: JValue,
+      metadataStr: String)
+
+  /**
+   * Load metadata from file.
+   * @param expectedClassName  If non empty, this is checked against the loaded metadata.
+   * @throws IllegalArgumentException if expectedClassName is specified and does not match metadata
+   */
+  def loadMetadata(path: String, sc: SparkContext, expectedClassName: String = ""): Metadata = {
     val metadataPath = new Path(path, "metadata").toString
     val metadataStr = sc.textFile(metadataPath, 1).first()
     val metadata = parse(metadataStr)
-    val cls = Utils.classForName((metadata \ "class").extract[String])
+
+    implicit val format = DefaultFormats
+    val className = (metadata \ "class").extract[String]
     val uid = (metadata \ "uid").extract[String]
-    val instance = cls.getConstructor(classOf[String]).newInstance(uid).asInstanceOf[Params]
-    (metadata \ "paramMap") match {
+    val timestamp = (metadata \ "timestamp").extract[Long]
+    val sparkVersion = (metadata \ "sparkVersion").extract[String]
+    val params = metadata \ "paramMap"
+    if (expectedClassName.nonEmpty) {
+      require(className == expectedClassName, s"Error loading metadata: Expected class name" +
+        s" $expectedClassName but found class name $className")
+    }
+
+    Metadata(className, uid, timestamp, sparkVersion, params, metadataStr)
+  }
+
+  /**
+   * Extract Params from metadata, and set them in the instance.
+   * This works if all Params implement [[org.apache.spark.ml.param.Param.jsonDecode()]].
+   */
+  def getAndSetParams(instance: Params, metadata: Metadata): Unit = {
+    implicit val format = DefaultFormats
+    metadata.params match {
       case JObject(pairs) =>
         pairs.foreach { case (paramName, jsonValue) =>
           val param = instance.getParam(paramName)
@@ -216,8 +278,8 @@ private[ml] class DefaultParamsReader[T] extends Reader[T] {
           instance.set(param, value)
         }
       case _ =>
-        throw new IllegalArgumentException(s"Cannot recognize JSON metadata: $metadataStr.")
+        throw new IllegalArgumentException(
+          s"Cannot recognize JSON metadata: ${metadata.metadataStr}.")
     }
-    instance.asInstanceOf[T]
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index 325faf37e8ee..51b06b7eb6d5 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -23,7 +23,7 @@ import scala.util.Random
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{Identifiable, DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.classification.LogisticRegressionSuite._
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -31,7 +31,8 @@ import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row}
 
-class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class LogisticRegressionSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   @transient var dataset: DataFrame = _
   @transient var binaryDataset: DataFrame = _
@@ -869,6 +870,18 @@ class LogisticRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(model1a0.intercept !~= model1a1.intercept absTol 1E-3)
     assert(model1a0.coefficients ~== model1b.coefficients absTol 1E-3)
     assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
+  }
 
+  test("read/write") {
+    // Set some Params to make sure set Params are serialized.
+    val lr = new LogisticRegression()
+      .setElasticNetParam(0.1)
+      .setMaxIter(2)
+      .fit(dataset)
+    val lr2 = testDefaultReadWrite(lr)
+    assert(lr.intercept === lr2.intercept)
+    assert(lr.coefficients.toArray === lr2.coefficients.toArray)
+    assert(lr.numClasses === lr2.numClasses)
+    assert(lr.numFeatures === lr2.numFeatures)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index 4545b0f281f5..cac4bd9aa3ab 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -31,8 +31,9 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
    * Checks "overwrite" option and params.
    * @param instance ML instance to test saving/loading
    * @tparam T ML instance type
+   * @return  Instance loaded from file
    */
-  def testDefaultReadWrite[T <: Params with Writable](instance: T): Unit = {
+  def testDefaultReadWrite[T <: Params with Writable](instance: T): T = {
     val uid = instance.uid
     val path = new File(tempDir, uid).getPath
 
@@ -61,6 +62,7 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
     val load = instance.getClass.getMethod("load", classOf[String])
     val another = load.invoke(instance, path).asInstanceOf[T]
     assert(another.uid === instance.uid)
+    another
   }
 }
 

From fac53d8ec015e27d034dfe30ed8ce7d83f07efa6 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Tue, 10 Nov 2015 22:24:00 -0800
Subject: [PATCH 620/896] [SPARK-10192][HOTFIX] Fix NPE in test that was added
 in #8402

This fixes an NPE introduced in SPARK-10192 / #8402.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9620 from JoshRosen/SPARK-10192-hotfix.
---
 .../scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 068b49bd5844..4d6b25455226 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -1070,7 +1070,7 @@ class DAGSchedulerSuite
     // Run the first job successfully, which creates one shuffle dependency
 
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
-    val shuffleDep = new ShuffleDependency(shuffleMapRdd, null)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))
     val reduceRdd = new MyRDD(sc, 2, List(shuffleDep))
     submit(reduceRdd, Array(0, 1))
 

From 1a8e0468a1c07e99ad395eb0e4dc072c5cf7393a Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Tue, 10 Nov 2015 22:45:17 -0800
Subject: [PATCH 621/896] [SPARK-11468] [SPARKR] add stddev/variance agg
 functions for Column

Checked names, none of them should conflict with anything in base

shivaram davies rxin

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9489 from felixcheung/rstddev.
---
 R/pkg/NAMESPACE                  |  10 ++
 R/pkg/R/functions.R              | 186 +++++++++++++++++++++++++++++--
 R/pkg/R/generics.R               |  40 +++++++
 R/pkg/R/group.R                  |   8 +-
 R/pkg/inst/tests/test_sparkSQL.R |  83 +++++++++++---
 5 files changed, 297 insertions(+), 30 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 52fd6c9f76c5..2ee7d6f94f1b 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -155,6 +155,7 @@ exportMethods("%in%",
               "isNaN",
               "isNotNull",
               "isNull",
+              "kurtosis",
               "lag",
               "last",
               "last_day",
@@ -207,12 +208,17 @@ exportMethods("%in%",
               "shiftLeft",
               "shiftRight",
               "shiftRightUnsigned",
+              "sd",
               "sign",
               "signum",
               "sin",
               "sinh",
               "size",
+              "skewness",
               "soundex",
+              "stddev",
+              "stddev_pop",
+              "stddev_samp",
               "sqrt",
               "startsWith",
               "substr",
@@ -231,6 +237,10 @@ exportMethods("%in%",
               "unhex",
               "unix_timestamp",
               "upper",
+              "var",
+              "variance",
+              "var_pop",
+              "var_samp",
               "weekofyear",
               "when",
               "year")
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index 0b280870295a..3d0255a62f15 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -520,6 +520,22 @@ setMethod("isNaN",
             column(jc)
           })
 
+#' kurtosis
+#'
+#' Aggregate function: returns the kurtosis of the values in a group.
+#'
+#' @rdname kurtosis
+#' @name kurtosis
+#' @family agg_funcs
+#' @export
+#' @examples \dontrun{kurtosis(df$c)}
+setMethod("kurtosis",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "kurtosis", x@jc)
+            column(jc)
+          })
+
 #' last
 #'
 #' Aggregate function: returns the last value in a group.
@@ -861,6 +877,28 @@ setMethod("rtrim",
             column(jc)
           })
 
+#' sd
+#'
+#' Aggregate function: alias for \link{stddev_samp}
+#'
+#' @rdname sd
+#' @name sd
+#' @family agg_funcs
+#' @seealso \link{stddev_pop}, \link{stddev_samp}
+#' @export
+#' @examples
+#'\dontrun{
+#'stddev(df$c)
+#'select(df, stddev(df$age))
+#'agg(df, sd(df$age))
+#'}
+setMethod("sd",
+          signature(x = "Column"),
+          function(x, na.rm = FALSE) {
+            # In R, sample standard deviation is calculated with the sd() function.
+            stddev_samp(x)
+          })
+
 #' second
 #'
 #' Extracts the seconds as an integer from a given date/timestamp/string.
@@ -958,6 +996,22 @@ setMethod("size",
             column(jc)
           })
 
+#' skewness
+#'
+#' Aggregate function: returns the skewness of the values in a group.
+#'
+#' @rdname skewness
+#' @name skewness
+#' @family agg_funcs
+#' @export
+#' @examples \dontrun{skewness(df$c)}
+setMethod("skewness",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "skewness", x@jc)
+            column(jc)
+          })
+
 #' soundex
 #'
 #' Return the soundex code for the specified expression.
@@ -974,6 +1028,49 @@ setMethod("soundex",
             column(jc)
           })
 
+#' @rdname sd
+#' @name stddev
+setMethod("stddev",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "stddev", x@jc)
+            column(jc)
+          })
+
+#' stddev_pop
+#'
+#' Aggregate function: returns the population standard deviation of the expression in a group.
+#'
+#' @rdname stddev_pop
+#' @name stddev_pop
+#' @family agg_funcs
+#' @seealso \link{sd}, \link{stddev_samp}
+#' @export
+#' @examples \dontrun{stddev_pop(df$c)}
+setMethod("stddev_pop",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "stddev_pop", x@jc)
+            column(jc)
+          })
+
+#' stddev_samp
+#'
+#' Aggregate function: returns the unbiased sample standard deviation of the expression in a group.
+#'
+#' @rdname stddev_samp
+#' @name stddev_samp
+#' @family agg_funcs
+#' @seealso \link{stddev_pop}, \link{sd}
+#' @export
+#' @examples \dontrun{stddev_samp(df$c)}
+setMethod("stddev_samp",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "stddev_samp", x@jc)
+            column(jc)
+          })
+
 #' sqrt
 #'
 #' Computes the square root of the specified float value.
@@ -1168,6 +1265,71 @@ setMethod("upper",
             column(jc)
           })
 
+#' var
+#'
+#' Aggregate function: alias for \link{var_samp}.
+#'
+#' @rdname var
+#' @name var
+#' @family agg_funcs
+#' @seealso \link{var_pop}, \link{var_samp}
+#' @export
+#' @examples
+#'\dontrun{
+#'variance(df$c)
+#'select(df, var_pop(df$age))
+#'agg(df, var(df$age))
+#'}
+setMethod("var",
+          signature(x = "Column"),
+          function(x, y = NULL, na.rm = FALSE, use) {
+            # In R, sample variance is calculated with the var() function.
+            var_samp(x)
+          })
+
+#' @rdname var
+#' @name variance
+setMethod("variance",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "variance", x@jc)
+            column(jc)
+          })
+
+#' var_pop
+#'
+#' Aggregate function: returns the population variance of the values in a group.
+#'
+#' @rdname var_pop
+#' @name var_pop
+#' @family agg_funcs
+#' @seealso \link{var}, \link{var_samp}
+#' @export
+#' @examples \dontrun{var_pop(df$c)}
+setMethod("var_pop",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "var_pop", x@jc)
+            column(jc)
+          })
+
+#' var_samp
+#'
+#' Aggregate function: returns the unbiased variance of the values in a group.
+#'
+#' @rdname var_samp
+#' @name var_samp
+#' @family agg_funcs
+#' @seealso \link{var_pop}, \link{var}
+#' @export
+#' @examples \dontrun{var_samp(df$c)}
+setMethod("var_samp",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "var_samp", x@jc)
+            column(jc)
+          })
+
 #' weekofyear
 #'
 #' Extracts the week number as an integer from a given date/timestamp/string.
@@ -2020,10 +2182,10 @@ setMethod("ifelse",
 #'
 #' Window function: returns the cumulative distribution of values within a window partition,
 #' i.e. the fraction of rows that are below the current row.
-#' 
+#'
 #'   N = total number of rows in the partition
 #'   cumeDist(x) = number of values before (and including) x / N
-#'   
+#'
 #' This is equivalent to the CUME_DIST function in SQL.
 #'
 #' @rdname cumeDist
@@ -2039,13 +2201,13 @@ setMethod("cumeDist",
           })
 
 #' denseRank
-#' 
+#'
 #' Window function: returns the rank of rows within a window partition, without any gaps.
 #' The difference between rank and denseRank is that denseRank leaves no gaps in ranking
 #' sequence when there are ties. That is, if you were ranking a competition using denseRank
 #' and had three people tie for second place, you would say that all three were in second
 #' place and that the next person came in third.
-#' 
+#'
 #' This is equivalent to the DENSE_RANK function in SQL.
 #'
 #' @rdname denseRank
@@ -2065,7 +2227,7 @@ setMethod("denseRank",
 #' Window function: returns the value that is `offset` rows before the current row, and
 #' `defaultValue` if there is less than `offset` rows before the current row. For example,
 #' an `offset` of one will return the previous row at any given point in the window partition.
-#' 
+#'
 #' This is equivalent to the LAG function in SQL.
 #'
 #' @rdname lag
@@ -2092,7 +2254,7 @@ setMethod("lag",
 #' Window function: returns the value that is `offset` rows after the current row, and
 #' `null` if there is less than `offset` rows after the current row. For example,
 #' an `offset` of one will return the next row at any given point in the window partition.
-#' 
+#'
 #' This is equivalent to the LEAD function in SQL.
 #'
 #' @rdname lead
@@ -2119,7 +2281,7 @@ setMethod("lead",
 #' Window function: returns the ntile group id (from 1 to `n` inclusive) in an ordered window
 #' partition. Fow example, if `n` is 4, the first quarter of the rows will get value 1, the second
 #' quarter will get 2, the third quarter will get 3, and the last quarter will get 4.
-#' 
+#'
 #' This is equivalent to the NTILE function in SQL.
 #'
 #' @rdname ntile
@@ -2137,9 +2299,9 @@ setMethod("ntile",
 #' percentRank
 #'
 #' Window function: returns the relative rank (i.e. percentile) of rows within a window partition.
-#' 
+#'
 #' This is computed by:
-#' 
+#'
 #'   (rank of row in its partition - 1) / (number of rows in the partition - 1)
 #'
 #' This is equivalent to the PERCENT_RANK function in SQL.
@@ -2159,12 +2321,12 @@ setMethod("percentRank",
 #' rank
 #'
 #' Window function: returns the rank of rows within a window partition.
-#' 
+#'
 #' The difference between rank and denseRank is that denseRank leaves no gaps in ranking
 #' sequence when there are ties. That is, if you were ranking a competition using denseRank
 #' and had three people tie for second place, you would say that all three were in second
 #' place and that the next person came in third.
-#' 
+#'
 #' This is equivalent to the RANK function in SQL.
 #'
 #' @rdname rank
@@ -2189,7 +2351,7 @@ setMethod("rank",
 #' rowNumber
 #'
 #' Window function: returns a sequential number starting at 1 within a window partition.
-#' 
+#'
 #' This is equivalent to the ROW_NUMBER function in SQL.
 #'
 #' @rdname rowNumber
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 89731affeb89..92ad4ee8685e 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -798,6 +798,10 @@ setGeneric("instr", function(y, x) { standardGeneric("instr") })
 #' @export
 setGeneric("isNaN", function(x) { standardGeneric("isNaN") })
 
+#' @rdname kurtosis
+#' @export
+setGeneric("kurtosis", function(x) { standardGeneric("kurtosis") })
+
 #' @rdname lag
 #' @export
 setGeneric("lag", function(x, offset, defaultValue = NULL) { standardGeneric("lag") })
@@ -935,6 +939,10 @@ setGeneric("rpad", function(x, len, pad) { standardGeneric("rpad") })
 #' @export
 setGeneric("rtrim", function(x) { standardGeneric("rtrim") })
 
+#' @rdname sd
+#' @export
+setGeneric("sd", function(x, na.rm = FALSE) { standardGeneric("sd") })
+
 #' @rdname second
 #' @export
 setGeneric("second", function(x) { standardGeneric("second") })
@@ -967,10 +975,26 @@ setGeneric("signum", function(x) { standardGeneric("signum") })
 #' @export
 setGeneric("size", function(x) { standardGeneric("size") })
 
+#' @rdname skewness
+#' @export
+setGeneric("skewness", function(x) { standardGeneric("skewness") })
+
 #' @rdname soundex
 #' @export
 setGeneric("soundex", function(x) { standardGeneric("soundex") })
 
+#' @rdname sd
+#' @export
+setGeneric("stddev", function(x) { standardGeneric("stddev") })
+
+#' @rdname stddev_pop
+#' @export
+setGeneric("stddev_pop", function(x) { standardGeneric("stddev_pop") })
+
+#' @rdname stddev_samp
+#' @export
+setGeneric("stddev_samp", function(x) { standardGeneric("stddev_samp") })
+
 #' @rdname substring_index
 #' @export
 setGeneric("substring_index", function(x, delim, count) { standardGeneric("substring_index") })
@@ -1019,6 +1043,22 @@ setGeneric("unix_timestamp", function(x, format) { standardGeneric("unix_timesta
 #' @export
 setGeneric("upper", function(x) { standardGeneric("upper") })
 
+#' @rdname var
+#' @export
+setGeneric("var", function(x, y = NULL, na.rm = FALSE, use) { standardGeneric("var") })
+
+#' @rdname var
+#' @export
+setGeneric("variance", function(x) { standardGeneric("variance") })
+
+#' @rdname var_pop
+#' @export
+setGeneric("var_pop", function(x) { standardGeneric("var_pop") })
+
+#' @rdname var_samp
+#' @export
+setGeneric("var_samp", function(x) { standardGeneric("var_samp") })
+
 #' @rdname weekofyear
 #' @export
 setGeneric("weekofyear", function(x) { standardGeneric("weekofyear") })
diff --git a/R/pkg/R/group.R b/R/pkg/R/group.R
index 4cab1a69f601..e5f702faee65 100644
--- a/R/pkg/R/group.R
+++ b/R/pkg/R/group.R
@@ -79,6 +79,7 @@ setMethod("count",
 #' @param x a GroupedData
 #' @return a DataFrame
 #' @rdname agg
+#' @family agg_funcs
 #' @examples
 #' \dontrun{
 #'  df2 <- agg(df, age = "sum")  # new column name will be created as 'SUM(age#0)'
@@ -117,8 +118,11 @@ setMethod("summarize",
             agg(x, ...)
           })
 
-# sum/mean/avg/min/max
-methods <- c("sum", "mean", "avg", "min", "max")
+# Aggregate Functions by name
+methods <- c("avg", "max", "mean", "min", "sum")
+
+# These are not exposed on GroupedData: "kurtosis", "skewness", "stddev", "stddev_samp", "stddev_pop",
+# "variance", "var_samp", "var_pop"
 
 createMethod <- function(name) {
   setMethod(name,
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 06f52d021cff..9e453a1e7c2f 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -826,12 +826,13 @@ test_that("column functions", {
   c6 <- log(c) + (c) + log1p(c) + log2(c) + lower(c) + ltrim(c) + max(c) + md5(c)
   c7 <- mean(c) + min(c) + month(c) + negate(c) + quarter(c)
   c8 <- reverse(c) + rint(c) + round(c) + rtrim(c) + sha1(c)
-  c9 <- signum(c) + sin(c) + sinh(c) + size(c) + soundex(c) + sqrt(c) + sum(c)
+  c9 <- signum(c) + sin(c) + sinh(c) + size(c) + stddev(c) + soundex(c) + sqrt(c) + sum(c)
   c10 <- sumDistinct(c) + tan(c) + tanh(c) + toDegrees(c) + toRadians(c)
   c11 <- to_date(c) + trim(c) + unbase64(c) + unhex(c) + upper(c)
-  c12 <- lead("col", 1) + lead(c, 1) + lag("col", 1) + lag(c, 1)
-  c13 <- cumeDist() + ntile(1)
-  c14 <- denseRank() + percentRank() + rank() + rowNumber()
+  c12 <- variance(c)
+  c13 <- lead("col", 1) + lead(c, 1) + lag("col", 1) + lag(c, 1)
+  c14 <- cumeDist() + ntile(1)
+  c15 <- denseRank() + percentRank() + rank() + rowNumber()
 
   # Test if base::rank() is exposed
   expect_equal(class(rank())[[1]], "Column")
@@ -849,6 +850,12 @@ test_that("column functions", {
   expect_equal(collect(df3)[[2, 1]], FALSE)
   expect_equal(collect(df3)[[3, 1]], TRUE)
 
+  expect_equal(collect(select(df, sum(df$age)))[1, 1], 49)
+
+  expect_true(abs(collect(select(df, stddev(df$age)))[1, 1] - 7.778175) < 1e-6)
+
+  expect_equal(collect(select(df, var_pop(df$age)))[1, 1], 30.25)
+
   df4 <- createDataFrame(sqlContext, list(list(a = "010101")))
   expect_equal(collect(select(df4, conv(df4$a, 2, 16)))[1, 1], "15")
 })
@@ -976,7 +983,7 @@ test_that("when(), otherwise() and ifelse() on a DataFrame", {
   expect_equal(collect(select(df, ifelse(df$a > 1 & df$b > 2, 0, 1)))[, 1], c(1, 0))
 })
 
-test_that("group by", {
+test_that("group by, agg functions", {
   df <- jsonFile(sqlContext, jsonPath)
   df1 <- agg(df, name = "max", age = "sum")
   expect_equal(1, count(df1))
@@ -997,20 +1004,64 @@ test_that("group by", {
   expect_is(df_summarized, "DataFrame")
   expect_equal(3, count(df_summarized))
 
-  df3 <- agg(gd, age = "sum")
-  expect_is(df3, "DataFrame")
-  expect_equal(3, count(df3))
-
-  df3 <- agg(gd, age = sum(df$age))
+  df3 <- agg(gd, age = "stddev")
   expect_is(df3, "DataFrame")
-  expect_equal(3, count(df3))
-  expect_equal(columns(df3), c("name", "age"))
+  df3_local <- collect(df3)
+  expect_equal(0, df3_local[df3_local$name == "Andy",][1, 2])
 
-  df4 <- sum(gd, "age")
+  df4 <- agg(gd, sumAge = sum(df$age))
   expect_is(df4, "DataFrame")
   expect_equal(3, count(df4))
-  expect_equal(3, count(mean(gd, "age")))
-  expect_equal(3, count(max(gd, "age")))
+  expect_equal(columns(df4), c("name", "sumAge"))
+
+  df5 <- sum(gd, "age")
+  expect_is(df5, "DataFrame")
+  expect_equal(3, count(df5))
+
+  expect_equal(3, count(mean(gd)))
+  expect_equal(3, count(max(gd)))
+  expect_equal(30, collect(max(gd))[1, 2])
+  expect_equal(1, collect(count(gd))[1, 2])
+
+  mockLines2 <- c("{\"name\":\"ID1\", \"value\": \"10\"}",
+                  "{\"name\":\"ID1\", \"value\": \"10\"}",
+                  "{\"name\":\"ID1\", \"value\": \"22\"}",
+                  "{\"name\":\"ID2\", \"value\": \"-3\"}")
+  jsonPath2 <- tempfile(pattern="sparkr-test", fileext=".tmp")
+  writeLines(mockLines2, jsonPath2)
+  gd2 <- groupBy(jsonFile(sqlContext, jsonPath2), "name")
+  df6 <- agg(gd2, value = "sum")
+  df6_local <- collect(df6)
+  expect_equal(42, df6_local[df6_local$name == "ID1",][1, 2])
+  expect_equal(-3, df6_local[df6_local$name == "ID2",][1, 2])
+
+  df7 <- agg(gd2, value = "stddev")
+  df7_local <- collect(df7)
+  expect_true(abs(df7_local[df7_local$name == "ID1",][1, 2] - 6.928203) < 1e-6)
+  expect_equal(0, df7_local[df7_local$name == "ID2",][1, 2])
+
+  mockLines3 <- c("{\"name\":\"Andy\", \"age\":30}",
+                  "{\"name\":\"Andy\", \"age\":30}",
+                  "{\"name\":\"Justin\", \"age\":19}",
+                  "{\"name\":\"Justin\", \"age\":1}")
+  jsonPath3 <- tempfile(pattern="sparkr-test", fileext=".tmp")
+  writeLines(mockLines3, jsonPath3)
+  df8 <- jsonFile(sqlContext, jsonPath3)
+  gd3 <- groupBy(df8, "name")
+  gd3_local <- collect(sum(gd3))
+  expect_equal(60, gd3_local[gd3_local$name == "Andy",][1, 2])
+  expect_equal(20, gd3_local[gd3_local$name == "Justin",][1, 2])
+
+  expect_true(abs(collect(agg(df, sd(df$age)))[1, 1] - 7.778175) < 1e-6)
+  gd3_local <- collect(agg(gd3, var(df8$age)))
+  expect_equal(162, gd3_local[gd3_local$name == "Justin",][1, 2])
+
+  # make sure base:: or stats::sd, var are working
+  expect_true(abs(sd(1:2) - 0.7071068) < 1e-6)
+  expect_true(abs(var(1:5, 1:5) - 2.5) < 1e-6)
+
+  unlink(jsonPath2)
+  unlink(jsonPath3)
 })
 
 test_that("arrange() and orderBy() on a DataFrame", {
@@ -1238,7 +1289,7 @@ test_that("mutate(), transform(), rename() and names()", {
   expect_equal(columns(transformedDF)[4], "newAge2")
   expect_equal(first(filter(transformedDF, transformedDF$name == "Andy"))$newAge, -30)
 
-  # test if transform on local data frames works
+  # test if base::transform on local data frames works
   # ensure the proper signature is used - otherwise this will fail to run
   attach(airquality)
   result <- transform(Ozone, logOzone = log(Ozone))

From bd70244b3cda62cc447fd4cc343d4eb5ddaec893 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 10 Nov 2015 22:46:17 -0800
Subject: [PATCH 622/896] [SPARK-11463] [PYSPARK] only install signal in main
 thread

Only install signal in main thread, or it will fail to create context in not-main thread.

Author: Davies Liu <davies@databricks.com>

Closes #9574 from davies/python_signal.
---
 python/pyspark/context.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/context.py b/python/pyspark/context.py
index afd74d937a41..77710a13394c 100644
--- a/python/pyspark/context.py
+++ b/python/pyspark/context.py
@@ -21,6 +21,7 @@
 import shutil
 import signal
 import sys
+import threading
 from threading import RLock
 from tempfile import NamedTemporaryFile
 
@@ -222,7 +223,9 @@ def _do_init(self, master, appName, sparkHome, pyFiles, environment, batchSize,
         def signal_handler(signal, frame):
             self.cancelAllJobs()
 
-        signal.signal(signal.SIGINT, signal_handler)
+        # see http://stackoverflow.com/questions/23206787/
+        if isinstance(threading.current_thread(), threading._MainThread):
+            signal.signal(signal.SIGINT, signal_handler)
 
     def _initialize_context(self, jconf):
         """

From 99f5f988612b3093d73d9ce98819767e822fcbff Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Tue, 10 Nov 2015 23:16:18 -0800
Subject: [PATCH 623/896] [SPARK-11290][STREAMING] Basic implementation of
 trackStateByKey

Current updateStateByKey provides stateful processing in Spark Streaming. It allows the user to maintain per-key state and manage that state using an updateFunction. The updateFunction is called for each key, and it uses new data and existing state of the key, to generate an updated state. However, based on community feedback, we have learnt the following lessons.
* Need for more optimized state management that does not scan every key
* Need to make it easier to implement common use cases - (a) timeout of idle data, (b) returning items other than state

The high level idea that of this PR
* Introduce a new API trackStateByKey that, allows the user to update per-key state, and emit arbitrary records. The new API is necessary as this will have significantly different semantics than the existing updateStateByKey API. This API will have direct support for timeouts.
* Internally, the system will keep the state data as a map/list within the partitions of the state RDDs. The new data RDDs will be partitioned appropriately, and for all the key-value data, it will lookup the map/list in the state RDD partition and create a new list/map of updated state data. The new state RDD partition will be created based on the update data and if necessary, with old data.
Here is the detailed design doc. Please take a look and provide feedback as comments.
https://docs.google.com/document/d/1NoALLyd83zGs1hNGMm0Pc5YOVgiPpMHugGMk6COqxxE/edit#heading=h.ph3w0clkd4em

This is still WIP. Major things left to be done.
- [x] Implement basic functionality of state tracking, with initial RDD and timeouts
- [x] Unit tests for state tracking
- [x] Unit tests for initial RDD and timeout
- [ ] Unit tests for TrackStateRDD
       - [x] state creating, updating, removing
       - [ ] emitting
       - [ ] checkpointing
- [x] Misc unit tests for State, TrackStateSpec, etc.
- [x] Update docs and experimental tags

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9256 from tdas/trackStateByKey.
---
 .../streaming/StatefulNetworkWordCount.scala  |  25 +-
 .../org/apache/spark/streaming/State.scala    | 193 +++++++
 .../apache/spark/streaming/StateSpec.scala    | 212 ++++++++
 .../dstream/PairDStreamFunctions.scala        |  46 +-
 .../streaming/dstream/TrackStateDStream.scala | 142 +++++
 .../spark/streaming/rdd/TrackStateRDD.scala   | 188 +++++++
 .../spark/streaming/util/StateMap.scala       | 337 ++++++++++++
 .../spark/streaming/StateMapSuite.scala       | 314 +++++++++++
 .../streaming/TrackStateByKeySuite.scala      | 494 ++++++++++++++++++
 .../streaming/rdd/TrackStateRDDSuite.scala    | 193 +++++++
 10 files changed, 2125 insertions(+), 19 deletions(-)
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/State.scala
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
 create mode 100644 streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
 create mode 100644 streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
 create mode 100644 streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala

diff --git a/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala b/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
index 02ba1c2eed0f..be2ae0b47336 100644
--- a/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
@@ -44,18 +44,6 @@ object StatefulNetworkWordCount {
 
     StreamingExamples.setStreamingLogLevels()
 
-    val updateFunc = (values: Seq[Int], state: Option[Int]) => {
-      val currentCount = values.sum
-
-      val previousCount = state.getOrElse(0)
-
-      Some(currentCount + previousCount)
-    }
-
-    val newUpdateFunc = (iterator: Iterator[(String, Seq[Int], Option[Int])]) => {
-      iterator.flatMap(t => updateFunc(t._2, t._3).map(s => (t._1, s)))
-    }
-
     val sparkConf = new SparkConf().setAppName("StatefulNetworkWordCount")
     // Create the context with a 1 second batch size
     val ssc = new StreamingContext(sparkConf, Seconds(1))
@@ -71,9 +59,16 @@ object StatefulNetworkWordCount {
     val wordDstream = words.map(x => (x, 1))
 
     // Update the cumulative count using updateStateByKey
-    // This will give a Dstream made of state (which is the cumulative count of the words)
-    val stateDstream = wordDstream.updateStateByKey[Int](newUpdateFunc,
-      new HashPartitioner (ssc.sparkContext.defaultParallelism), true, initialRDD)
+    // This will give a DStream made of state (which is the cumulative count of the words)
+    val trackStateFunc = (batchTime: Time, word: String, one: Option[Int], state: State[Int]) => {
+      val sum = one.getOrElse(0) + state.getOption.getOrElse(0)
+      val output = (word, sum)
+      state.update(sum)
+      Some(output)
+    }
+
+    val stateDstream = wordDstream.trackStateByKey(
+      StateSpec.function(trackStateFunc).initialState(initialRDD))
     stateDstream.print()
     ssc.start()
     ssc.awaitTermination()
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/State.scala b/streaming/src/main/scala/org/apache/spark/streaming/State.scala
new file mode 100644
index 000000000000..7dd1b72f8049
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/State.scala
@@ -0,0 +1,193 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming
+
+import scala.language.implicitConversions
+
+import org.apache.spark.annotation.Experimental
+
+/**
+ * :: Experimental ::
+ * Abstract class for getting and updating the tracked state in the `trackStateByKey` operation of
+ * a [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
+ * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+ *
+ * Scala example of using `State`:
+ * {{{
+ *    // A tracking function that maintains an integer state and return a String
+ *    def trackStateFunc(data: Option[Int], state: State[Int]): Option[String] = {
+ *      // Check if state exists
+ *      if (state.exists) {
+ *        val existingState = state.get  // Get the existing state
+ *        val shouldRemove = ...         // Decide whether to remove the state
+ *        if (shouldRemove) {
+ *          state.remove()     // Remove the state
+ *        } else {
+ *          val newState = ...
+ *          state.update(newState)    // Set the new state
+ *        }
+ *      } else {
+ *        val initialState = ...
+ *        state.update(initialState)  // Set the initial state
+ *      }
+ *      ... // return something
+ *    }
+ *
+ * }}}
+ *
+ * Java example:
+ * {{{
+ *      TODO(@zsxwing)
+ * }}}
+ */
+@Experimental
+sealed abstract class State[S] {
+
+  /** Whether the state already exists */
+  def exists(): Boolean
+
+  /**
+   * Get the state if it exists, otherwise it will throw `java.util.NoSuchElementException`.
+   * Check with `exists()` whether the state exists or not before calling `get()`.
+   *
+   * @throws java.util.NoSuchElementException If the state does not exist.
+   */
+  def get(): S
+
+  /**
+   * Update the state with a new value.
+   *
+   * State cannot be updated if it has been already removed (that is, `remove()` has already been
+   * called) or it is going to be removed due to timeout (that is, `isTimingOut()` is `true`).
+   *
+   * @throws java.lang.IllegalArgumentException If the state has already been removed, or is
+   *                                            going to be removed
+   */
+  def update(newState: S): Unit
+
+  /**
+   * Remove the state if it exists.
+   *
+   * State cannot be updated if it has been already removed (that is, `remove()` has already been
+   * called) or it is going to be removed due to timeout (that is, `isTimingOut()` is `true`).
+   */
+  def remove(): Unit
+
+  /**
+   * Whether the state is timing out and going to be removed by the system after the current batch.
+   * This timeout can occur if timeout duration has been specified in the
+   * [[org.apache.spark.streaming.StateSpec StatSpec]] and the key has not received any new data
+   * for that timeout duration.
+   */
+  def isTimingOut(): Boolean
+
+  /**
+   * Get the state as an [[scala.Option]]. It will be `Some(state)` if it exists, otherwise `None`.
+   */
+  @inline final def getOption(): Option[S] = if (exists) Some(get()) else None
+
+  @inline final override def toString(): String = {
+    getOption.map { _.toString }.getOrElse("<state not set>")
+  }
+}
+
+/** Internal implementation of the [[State]] interface */
+private[streaming] class StateImpl[S] extends State[S] {
+
+  private var state: S = null.asInstanceOf[S]
+  private var defined: Boolean = false
+  private var timingOut: Boolean = false
+  private var updated: Boolean = false
+  private var removed: Boolean = false
+
+  // ========= Public API =========
+  override def exists(): Boolean = {
+    defined
+  }
+
+  override def get(): S = {
+    if (defined) {
+      state
+    } else {
+      throw new NoSuchElementException("State is not set")
+    }
+  }
+
+  override def update(newState: S): Unit = {
+    require(!removed, "Cannot update the state after it has been removed")
+    require(!timingOut, "Cannot update the state that is timing out")
+    state = newState
+    defined = true
+    updated = true
+  }
+
+  override def isTimingOut(): Boolean = {
+    timingOut
+  }
+
+  override def remove(): Unit = {
+    require(!timingOut, "Cannot remove the state that is timing out")
+    require(!removed, "Cannot remove the state that has already been removed")
+    defined = false
+    updated = false
+    removed = true
+  }
+
+  // ========= Internal API =========
+
+  /** Whether the state has been marked for removing */
+  def isRemoved(): Boolean = {
+    removed
+  }
+
+  /** Whether the state has been been updated */
+  def isUpdated(): Boolean = {
+    updated
+  }
+
+  /**
+   * Update the internal data and flags in `this` to the given state option.
+   * This method allows `this` object to be reused across many state records.
+   */
+  def wrap(optionalState: Option[S]): Unit = {
+    optionalState match {
+      case Some(newState) =>
+        this.state = newState
+        defined = true
+
+      case None =>
+        this.state = null.asInstanceOf[S]
+        defined = false
+    }
+    timingOut = false
+    removed = false
+    updated = false
+  }
+
+  /**
+   * Update the internal data and flags in `this` to the given state that is going to be timed out.
+   * This method allows `this` object to be reused across many state records.
+   */
+  def wrapTiminoutState(newState: S): Unit = {
+    this.state = newState
+    defined = true
+    timingOut = true
+    removed = false
+    updated = false
+  }
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala b/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
new file mode 100644
index 000000000000..c9fe35e74c1c
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
@@ -0,0 +1,212 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.api.java.JavaPairRDD
+import org.apache.spark.rdd.RDD
+import org.apache.spark.util.ClosureCleaner
+import org.apache.spark.{HashPartitioner, Partitioner}
+
+
+/**
+ * :: Experimental ::
+ * Abstract class representing all the specifications of the DStream transformation
+ * `trackStateByKey` operation of a
+ * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
+ * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+ * Use the [[org.apache.spark.streaming.StateSpec StateSpec.apply()]] or
+ * [[org.apache.spark.streaming.StateSpec StateSpec.create()]] to create instances of
+ * this class.
+ *
+ * Example in Scala:
+ * {{{
+ *    def trackingFunction(data: Option[ValueType], wrappedState: State[StateType]): EmittedType = {
+ *      ...
+ *    }
+ *
+ *    val spec = StateSpec.function(trackingFunction).numPartitions(10)
+ *
+ *    val emittedRecordDStream = keyValueDStream.trackStateByKey[StateType, EmittedDataType](spec)
+ * }}}
+ *
+ * Example in Java:
+ * {{{
+ *    StateStateSpec[KeyType, ValueType, StateType, EmittedDataType] spec =
+ *      StateStateSpec.function[KeyType, ValueType, StateType, EmittedDataType](trackingFunction)
+ *                    .numPartition(10);
+ *
+ *    JavaDStream[EmittedDataType] emittedRecordDStream =
+ *      javaPairDStream.trackStateByKey[StateType, EmittedDataType](spec);
+ * }}}
+ */
+@Experimental
+sealed abstract class StateSpec[KeyType, ValueType, StateType, EmittedType] extends Serializable {
+
+  /** Set the RDD containing the initial states that will be used by `trackStateByKey` */
+  def initialState(rdd: RDD[(KeyType, StateType)]): this.type
+
+  /** Set the RDD containing the initial states that will be used by `trackStateByKey` */
+  def initialState(javaPairRDD: JavaPairRDD[KeyType, StateType]): this.type
+
+  /**
+   * Set the number of partitions by which the state RDDs generated by `trackStateByKey`
+   * will be partitioned. Hash partitioning will be used.
+   */
+  def numPartitions(numPartitions: Int): this.type
+
+  /**
+   * Set the partitioner by which the state RDDs generated by `trackStateByKey` will be
+   * be partitioned.
+   */
+  def partitioner(partitioner: Partitioner): this.type
+
+  /**
+   * Set the duration after which the state of an idle key will be removed. A key and its state is
+   * considered idle if it has not received any data for at least the given duration. The state
+   * tracking function will be called one final time on the idle states that are going to be
+   * removed; [[org.apache.spark.streaming.State State.isTimingOut()]] set
+   * to `true` in that call.
+   */
+  def timeout(idleDuration: Duration): this.type
+}
+
+
+/**
+ * :: Experimental ::
+ * Builder object for creating instances of [[org.apache.spark.streaming.StateSpec StateSpec]]
+ * that is used for specifying the parameters of the DStream transformation
+ * `trackStateByKey` operation of a
+ * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
+ * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+ *
+ * Example in Scala:
+ * {{{
+ *    def trackingFunction(data: Option[ValueType], wrappedState: State[StateType]): EmittedType = {
+ *      ...
+ *    }
+ *
+ *    val spec = StateSpec.function(trackingFunction).numPartitions(10)
+ *
+ *    val emittedRecordDStream = keyValueDStream.trackStateByKey[StateType, EmittedDataType](spec)
+ * }}}
+ *
+ * Example in Java:
+ * {{{
+ *    StateStateSpec[KeyType, ValueType, StateType, EmittedDataType] spec =
+ *      StateStateSpec.function[KeyType, ValueType, StateType, EmittedDataType](trackingFunction)
+ *                    .numPartition(10);
+ *
+ *    JavaDStream[EmittedDataType] emittedRecordDStream =
+ *      javaPairDStream.trackStateByKey[StateType, EmittedDataType](spec);
+ * }}}
+ */
+@Experimental
+object StateSpec {
+  /**
+   * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all the specifications
+   * `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
+   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+   * @param trackingFunction The function applied on every data item to manage the associated state
+   *                         and generate the emitted data
+   * @tparam KeyType      Class of the keys
+   * @tparam ValueType    Class of the values
+   * @tparam StateType    Class of the states data
+   * @tparam EmittedType  Class of the emitted data
+   */
+  def function[KeyType, ValueType, StateType, EmittedType](
+      trackingFunction: (Time, KeyType, Option[ValueType], State[StateType]) => Option[EmittedType]
+    ): StateSpec[KeyType, ValueType, StateType, EmittedType] = {
+    ClosureCleaner.clean(trackingFunction, checkSerializable = true)
+    new StateSpecImpl(trackingFunction)
+  }
+
+  /**
+   * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all the specifications
+   * `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
+   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+   * @param trackingFunction The function applied on every data item to manage the associated state
+   *                         and generate the emitted data
+   * @tparam ValueType    Class of the values
+   * @tparam StateType    Class of the states data
+   * @tparam EmittedType  Class of the emitted data
+   */
+  def function[KeyType, ValueType, StateType, EmittedType](
+      trackingFunction: (Option[ValueType], State[StateType]) => EmittedType
+    ): StateSpec[KeyType, ValueType, StateType, EmittedType] = {
+    ClosureCleaner.clean(trackingFunction, checkSerializable = true)
+    val wrappedFunction =
+      (time: Time, key: Any, value: Option[ValueType], state: State[StateType]) => {
+        Some(trackingFunction(value, state))
+      }
+    new StateSpecImpl(wrappedFunction)
+  }
+}
+
+
+/** Internal implementation of [[org.apache.spark.streaming.StateSpec]] interface. */
+private[streaming]
+case class StateSpecImpl[K, V, S, T](
+    function: (Time, K, Option[V], State[S]) => Option[T]) extends StateSpec[K, V, S, T] {
+
+  require(function != null)
+
+  @volatile private var partitioner: Partitioner = null
+  @volatile private var initialStateRDD: RDD[(K, S)] = null
+  @volatile private var timeoutInterval: Duration = null
+
+  override def initialState(rdd: RDD[(K, S)]): this.type = {
+    this.initialStateRDD = rdd
+    this
+  }
+
+  override def initialState(javaPairRDD: JavaPairRDD[K, S]): this.type = {
+    this.initialStateRDD = javaPairRDD.rdd
+    this
+  }
+
+
+  override def numPartitions(numPartitions: Int): this.type = {
+    this.partitioner(new HashPartitioner(numPartitions))
+    this
+  }
+
+  override def partitioner(partitioner: Partitioner): this.type = {
+    this.partitioner = partitioner
+    this
+  }
+
+  override def timeout(interval: Duration): this.type = {
+    this.timeoutInterval = interval
+    this
+  }
+
+  // ================= Private Methods =================
+
+  private[streaming] def getFunction(): (Time, K, Option[V], State[S]) => Option[T] = function
+
+  private[streaming] def getInitialStateRDD(): Option[RDD[(K, S)]] = Option(initialStateRDD)
+
+  private[streaming] def getPartitioner(): Option[Partitioner] = Option(partitioner)
+
+  private[streaming] def getTimeoutInterval(): Option[Duration] = Option(timeoutInterval)
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/PairDStreamFunctions.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/PairDStreamFunctions.scala
index 71bec96d46c8..fb691eed27e3 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/PairDStreamFunctions.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/PairDStreamFunctions.scala
@@ -24,19 +24,19 @@ import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.mapred.{JobConf, OutputFormat}
 import org.apache.hadoop.mapreduce.{OutputFormat => NewOutputFormat}
 
-import org.apache.spark.{HashPartitioner, Partitioner}
+import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
-import org.apache.spark.streaming.{Duration, Time}
 import org.apache.spark.streaming.StreamingContext.rddToFileName
+import org.apache.spark.streaming._
 import org.apache.spark.util.{SerializableConfiguration, SerializableJobConf}
+import org.apache.spark.{HashPartitioner, Partitioner}
 
 /**
  * Extra functions available on DStream of (key, value) pairs through an implicit conversion.
  */
 class PairDStreamFunctions[K, V](self: DStream[(K, V)])
     (implicit kt: ClassTag[K], vt: ClassTag[V], ord: Ordering[K])
-  extends Serializable
-{
+  extends Serializable {
   private[streaming] def ssc = self.ssc
 
   private[streaming] def sparkContext = self.context.sparkContext
@@ -350,6 +350,44 @@ class PairDStreamFunctions[K, V](self: DStream[(K, V)])
     )
   }
 
+  /**
+   * :: Experimental ::
+   * Return a new DStream of data generated by combining the key-value data in `this` stream
+   * with a continuously updated per-key state. The user-provided state tracking function is
+   * applied on each keyed data item along with its corresponding state. The function can choose to
+   * update/remove the state and return a transformed data, which forms the
+   * [[org.apache.spark.streaming.dstream.TrackStateDStream]].
+   *
+   * The specifications of this transformation is made through the
+   * [[org.apache.spark.streaming.StateSpec StateSpec]] class. Besides the tracking function, there
+   * are a number of optional parameters - initial state data, number of partitions, timeouts, etc.
+   * See the [[org.apache.spark.streaming.StateSpec StateSpec spec docs]] for more details.
+   *
+   * Example of using `trackStateByKey`:
+   * {{{
+   *    def trackingFunction(data: Option[Int], wrappedState: State[Int]): String = {
+   *      // Check if state exists, accordingly update/remove state and return transformed data
+   *    }
+   *
+   *    val spec = StateSpec.function(trackingFunction).numPartitions(10)
+   *
+   *    val trackStateDStream = keyValueDStream.trackStateByKey[Int, String](spec)
+   * }}}
+   *
+   * @param spec          Specification of this transformation
+   * @tparam StateType    Class type of the state
+   * @tparam EmittedType  Class type of the tranformed data return by the tracking function
+   */
+  @Experimental
+  def trackStateByKey[StateType: ClassTag, EmittedType: ClassTag](
+      spec: StateSpec[K, V, StateType, EmittedType]
+    ): TrackStateDStream[K, V, StateType, EmittedType] = {
+    new TrackStateDStreamImpl[K, V, StateType, EmittedType](
+      self,
+      spec.asInstanceOf[StateSpecImpl[K, V, StateType, EmittedType]]
+    )
+  }
+
   /**
    * Return a new "state" DStream where the state for each key is updated by applying
    * the given function on the previous state of the key and the new values of each key.
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
new file mode 100644
index 000000000000..58d89c93bcbe
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
@@ -0,0 +1,142 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.dstream
+
+import scala.reflect.ClassTag
+
+import org.apache.spark._
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.rdd.{EmptyRDD, RDD}
+import org.apache.spark.storage.StorageLevel
+import org.apache.spark.streaming._
+import org.apache.spark.streaming.rdd.{TrackStateRDD, TrackStateRDDRecord}
+
+/**
+ * :: Experimental ::
+ * DStream representing the stream of records emitted by the tracking function in the
+ * `trackStateByKey` operation on a
+ * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]].
+ * Additionally, it also gives access to the stream of state snapshots, that is, the state data of
+ * all keys after a batch has updated them.
+ *
+ * @tparam KeyType Class of the state key
+ * @tparam StateType Class of the state data
+ * @tparam EmittedType Class of the emitted records
+ */
+@Experimental
+sealed abstract class TrackStateDStream[KeyType, ValueType, StateType, EmittedType: ClassTag](
+    ssc: StreamingContext) extends DStream[EmittedType](ssc) {
+
+  /** Return a pair DStream where each RDD is the snapshot of the state of all the keys. */
+  def stateSnapshots(): DStream[(KeyType, StateType)]
+}
+
+/** Internal implementation of the [[TrackStateDStream]] */
+private[streaming] class TrackStateDStreamImpl[
+    KeyType: ClassTag, ValueType: ClassTag, StateType: ClassTag, EmittedType: ClassTag](
+    dataStream: DStream[(KeyType, ValueType)],
+    spec: StateSpecImpl[KeyType, ValueType, StateType, EmittedType])
+  extends TrackStateDStream[KeyType, ValueType, StateType, EmittedType](dataStream.context) {
+
+  private val internalStream =
+    new InternalTrackStateDStream[KeyType, ValueType, StateType, EmittedType](dataStream, spec)
+
+  override def slideDuration: Duration = internalStream.slideDuration
+
+  override def dependencies: List[DStream[_]] = List(internalStream)
+
+  override def compute(validTime: Time): Option[RDD[EmittedType]] = {
+    internalStream.getOrCompute(validTime).map { _.flatMap[EmittedType] { _.emittedRecords } }
+  }
+
+  /**
+   * Forward the checkpoint interval to the internal DStream that computes the state maps. This
+   * to make sure that this DStream does not get checkpointed, only the internal stream.
+   */
+  override def checkpoint(checkpointInterval: Duration): DStream[EmittedType] = {
+    internalStream.checkpoint(checkpointInterval)
+    this
+  }
+
+  /** Return a pair DStream where each RDD is the snapshot of the state of all the keys. */
+  def stateSnapshots(): DStream[(KeyType, StateType)] = {
+    internalStream.flatMap {
+      _.stateMap.getAll().map { case (k, s, _) => (k, s) }.toTraversable }
+  }
+
+  def keyClass: Class[_] = implicitly[ClassTag[KeyType]].runtimeClass
+
+  def valueClass: Class[_] = implicitly[ClassTag[ValueType]].runtimeClass
+
+  def stateClass: Class[_] = implicitly[ClassTag[StateType]].runtimeClass
+
+  def emittedClass: Class[_] = implicitly[ClassTag[EmittedType]].runtimeClass
+}
+
+/**
+ * A DStream that allows per-key state to be maintains, and arbitrary records to be generated
+ * based on updates to the state. This is the main DStream that implements the `trackStateByKey`
+ * operation on DStreams.
+ *
+ * @param parent Parent (key, value) stream that is the source
+ * @param spec Specifications of the trackStateByKey operation
+ * @tparam K   Key type
+ * @tparam V   Value type
+ * @tparam S   Type of the state maintained
+ * @tparam E   Type of the emitted data
+ */
+private[streaming]
+class InternalTrackStateDStream[K: ClassTag, V: ClassTag, S: ClassTag, E: ClassTag](
+    parent: DStream[(K, V)], spec: StateSpecImpl[K, V, S, E])
+  extends DStream[TrackStateRDDRecord[K, S, E]](parent.context) {
+
+  persist(StorageLevel.MEMORY_ONLY)
+
+  private val partitioner = spec.getPartitioner().getOrElse(
+    new HashPartitioner(ssc.sc.defaultParallelism))
+
+  private val trackingFunction = spec.getFunction()
+
+  override def slideDuration: Duration = parent.slideDuration
+
+  override def dependencies: List[DStream[_]] = List(parent)
+
+  /** Enable automatic checkpointing */
+  override val mustCheckpoint = true
+
+  /** Method that generates a RDD for the given time */
+  override def compute(validTime: Time): Option[RDD[TrackStateRDDRecord[K, S, E]]] = {
+    // Get the previous state or create a new empty state RDD
+    val prevStateRDD = getOrCompute(validTime - slideDuration).getOrElse {
+      TrackStateRDD.createFromPairRDD[K, V, S, E](
+        spec.getInitialStateRDD().getOrElse(new EmptyRDD[(K, S)](ssc.sparkContext)),
+        partitioner, validTime
+      )
+    }
+
+    // Compute the new state RDD with previous state RDD and partitioned data RDD
+    parent.getOrCompute(validTime).map { dataRDD =>
+      val partitionedDataRDD = dataRDD.partitionBy(partitioner)
+      val timeoutThresholdTime = spec.getTimeoutInterval().map { interval =>
+        (validTime - interval).milliseconds
+      }
+      new TrackStateRDD(
+        prevStateRDD, partitionedDataRDD, trackingFunction, validTime, timeoutThresholdTime)
+    }
+  }
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
new file mode 100644
index 000000000000..ed7cea26d060
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
@@ -0,0 +1,188 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.rdd
+
+import java.io.{IOException, ObjectInputStream, ObjectOutputStream}
+
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.ClassTag
+
+import org.apache.spark.rdd.{MapPartitionsRDD, RDD}
+import org.apache.spark.streaming.{Time, StateImpl, State}
+import org.apache.spark.streaming.util.{EmptyStateMap, StateMap}
+import org.apache.spark.util.Utils
+import org.apache.spark._
+
+/**
+ * Record storing the keyed-state [[TrackStateRDD]]. Each record contains a [[StateMap]] and a
+ * sequence of records returned by the tracking function of `trackStateByKey`.
+ */
+private[streaming] case class TrackStateRDDRecord[K, S, T](
+    var stateMap: StateMap[K, S], var emittedRecords: Seq[T])
+
+/**
+ * Partition of the [[TrackStateRDD]], which depends on corresponding partitions of prev state
+ * RDD, and a partitioned keyed-data RDD
+ */
+private[streaming] class TrackStateRDDPartition(
+    idx: Int,
+    @transient private var prevStateRDD: RDD[_],
+    @transient private var partitionedDataRDD: RDD[_]) extends Partition {
+
+  private[rdd] var previousSessionRDDPartition: Partition = null
+  private[rdd] var partitionedDataRDDPartition: Partition = null
+
+  override def index: Int = idx
+  override def hashCode(): Int = idx
+
+  @throws(classOf[IOException])
+  private def writeObject(oos: ObjectOutputStream): Unit = Utils.tryOrIOException {
+    // Update the reference to parent split at the time of task serialization
+    previousSessionRDDPartition = prevStateRDD.partitions(index)
+    partitionedDataRDDPartition = partitionedDataRDD.partitions(index)
+    oos.defaultWriteObject()
+  }
+}
+
+
+/**
+ * RDD storing the keyed-state of `trackStateByKey` and corresponding emitted records.
+ * Each partition of this RDD has a single record of type [[TrackStateRDDRecord]]. This contains a
+ * [[StateMap]] (containing the keyed-states) and the sequence of records returned by the tracking
+ * function of  `trackStateByKey`.
+ * @param prevStateRDD The previous TrackStateRDD on whose StateMap data `this` RDD will be created
+ * @param partitionedDataRDD The partitioned data RDD which is used update the previous StateMaps
+ *                           in the `prevStateRDD` to create `this` RDD
+ * @param trackingFunction The function that will be used to update state and return new data
+ * @param batchTime        The time of the batch to which this RDD belongs to. Use to update
+ */
+private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
+    private var prevStateRDD: RDD[TrackStateRDDRecord[K, S, T]],
+    private var partitionedDataRDD: RDD[(K, V)],
+    trackingFunction: (Time, K, Option[V], State[S]) => Option[T],
+    batchTime: Time, timeoutThresholdTime: Option[Long]
+  ) extends RDD[TrackStateRDDRecord[K, S, T]](
+    partitionedDataRDD.sparkContext,
+    List(
+      new OneToOneDependency[TrackStateRDDRecord[K, S, T]](prevStateRDD),
+      new OneToOneDependency(partitionedDataRDD))
+  ) {
+
+  @volatile private var doFullScan = false
+
+  require(prevStateRDD.partitioner.nonEmpty)
+  require(partitionedDataRDD.partitioner == prevStateRDD.partitioner)
+
+  override val partitioner = prevStateRDD.partitioner
+
+  override def checkpoint(): Unit = {
+    super.checkpoint()
+    doFullScan = true
+  }
+
+  override def compute(
+      partition: Partition, context: TaskContext): Iterator[TrackStateRDDRecord[K, S, T]] = {
+
+    val stateRDDPartition = partition.asInstanceOf[TrackStateRDDPartition]
+    val prevStateRDDIterator = prevStateRDD.iterator(
+      stateRDDPartition.previousSessionRDDPartition, context)
+    val dataIterator = partitionedDataRDD.iterator(
+      stateRDDPartition.partitionedDataRDDPartition, context)
+
+    // Create a new state map by cloning the previous one (if it exists) or by creating an empty one
+    val newStateMap = if (prevStateRDDIterator.hasNext) {
+      prevStateRDDIterator.next().stateMap.copy()
+    } else {
+      new EmptyStateMap[K, S]()
+    }
+
+    val emittedRecords = new ArrayBuffer[T]
+    val wrappedState = new StateImpl[S]()
+
+    // Call the tracking function on each record in the data RDD partition, and accordingly
+    // update the states touched, and the data returned by the tracking function.
+    dataIterator.foreach { case (key, value) =>
+      wrappedState.wrap(newStateMap.get(key))
+      val emittedRecord = trackingFunction(batchTime, key, Some(value), wrappedState)
+      if (wrappedState.isRemoved) {
+        newStateMap.remove(key)
+      } else if (wrappedState.isUpdated) {
+        newStateMap.put(key, wrappedState.get(), batchTime.milliseconds)
+      }
+      emittedRecords ++= emittedRecord
+    }
+
+    // If the RDD is expected to be doing a full scan of all the data in the StateMap,
+    // then use this opportunity to filter out those keys that have timed out.
+    // For each of them call the tracking function.
+    if (doFullScan && timeoutThresholdTime.isDefined) {
+      newStateMap.getByTime(timeoutThresholdTime.get).foreach { case (key, state, _) =>
+        wrappedState.wrapTiminoutState(state)
+        val emittedRecord = trackingFunction(batchTime, key, None, wrappedState)
+        emittedRecords ++= emittedRecord
+        newStateMap.remove(key)
+      }
+    }
+
+    Iterator(TrackStateRDDRecord(newStateMap, emittedRecords))
+  }
+
+  override protected def getPartitions: Array[Partition] = {
+    Array.tabulate(prevStateRDD.partitions.length) { i =>
+      new TrackStateRDDPartition(i, prevStateRDD, partitionedDataRDD)}
+  }
+
+  override def clearDependencies(): Unit = {
+    super.clearDependencies()
+    prevStateRDD = null
+    partitionedDataRDD = null
+  }
+
+  def setFullScan(): Unit = {
+    doFullScan = true
+  }
+}
+
+private[streaming] object TrackStateRDD {
+
+  def createFromPairRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
+      pairRDD: RDD[(K, S)],
+      partitioner: Partitioner,
+      updateTime: Time): TrackStateRDD[K, V, S, T] = {
+
+    val rddOfTrackStateRecords = pairRDD.partitionBy(partitioner).mapPartitions ({ iterator =>
+      val stateMap = StateMap.create[K, S](SparkEnv.get.conf)
+      iterator.foreach { case (key, state) => stateMap.put(key, state, updateTime.milliseconds) }
+      Iterator(TrackStateRDDRecord(stateMap, Seq.empty[T]))
+    }, preservesPartitioning = true)
+
+    val emptyDataRDD = pairRDD.sparkContext.emptyRDD[(K, V)].partitionBy(partitioner)
+
+    val noOpFunc = (time: Time, key: K, value: Option[V], state: State[S]) => None
+
+    new TrackStateRDD[K, V, S, T](rddOfTrackStateRecords, emptyDataRDD, noOpFunc, updateTime, None)
+  }
+}
+
+private[streaming] class EmittedRecordsRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
+    parent: TrackStateRDD[K, V, S, T]) extends RDD[T](parent) {
+  override protected def getPartitions: Array[Partition] = parent.partitions
+  override def compute(partition: Partition, context: TaskContext): Iterator[T] = {
+    parent.compute(partition, context).flatMap { _.emittedRecords }
+  }
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
new file mode 100644
index 000000000000..ed622ef7bf70
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
@@ -0,0 +1,337 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.util
+
+import java.io.{ObjectInputStream, ObjectOutputStream}
+
+import scala.reflect.ClassTag
+
+import org.apache.spark.SparkConf
+import org.apache.spark.streaming.util.OpenHashMapBasedStateMap._
+import org.apache.spark.util.collection.OpenHashMap
+
+/** Internal interface for defining the map that keeps track of sessions. */
+private[streaming] abstract class StateMap[K: ClassTag, S: ClassTag] extends Serializable {
+
+  /** Get the state for a key if it exists */
+  def get(key: K): Option[S]
+
+  /** Get all the keys and states whose updated time is older than the given threshold time */
+  def getByTime(threshUpdatedTime: Long): Iterator[(K, S, Long)]
+
+  /** Get all the keys and states in this map. */
+  def getAll(): Iterator[(K, S, Long)]
+
+  /** Add or update state */
+  def put(key: K, state: S, updatedTime: Long): Unit
+
+  /** Remove a key */
+  def remove(key: K): Unit
+
+  /**
+   * Shallow copy `this` map to create a new state map.
+   * Updates to the new map should not mutate `this` map.
+   */
+  def copy(): StateMap[K, S]
+
+  def toDebugString(): String = toString()
+}
+
+/** Companion object for [[StateMap]], with utility methods */
+private[streaming] object StateMap {
+  def empty[K: ClassTag, S: ClassTag]: StateMap[K, S] = new EmptyStateMap[K, S]
+
+  def create[K: ClassTag, S: ClassTag](conf: SparkConf): StateMap[K, S] = {
+    val deltaChainThreshold = conf.getInt("spark.streaming.sessionByKey.deltaChainThreshold",
+      DELTA_CHAIN_LENGTH_THRESHOLD)
+    new OpenHashMapBasedStateMap[K, S](64, deltaChainThreshold)
+  }
+}
+
+/** Implementation of StateMap interface representing an empty map */
+private[streaming] class EmptyStateMap[K: ClassTag, S: ClassTag] extends StateMap[K, S] {
+  override def put(key: K, session: S, updateTime: Long): Unit = {
+    throw new NotImplementedError("put() should not be called on an EmptyStateMap")
+  }
+  override def get(key: K): Option[S] = None
+  override def getByTime(threshUpdatedTime: Long): Iterator[(K, S, Long)] = Iterator.empty
+  override def getAll(): Iterator[(K, S, Long)] = Iterator.empty
+  override def copy(): StateMap[K, S] = this
+  override def remove(key: K): Unit = { }
+  override def toDebugString(): String = ""
+}
+
+/** Implementation of StateMap based on Spark's [[org.apache.spark.util.collection.OpenHashMap]] */
+private[streaming] class OpenHashMapBasedStateMap[K: ClassTag, S: ClassTag](
+    @transient @volatile var parentStateMap: StateMap[K, S],
+    initialCapacity: Int = 64,
+    deltaChainThreshold: Int = DELTA_CHAIN_LENGTH_THRESHOLD
+  ) extends StateMap[K, S] { self =>
+
+  def this(initialCapacity: Int, deltaChainThreshold: Int) = this(
+    new EmptyStateMap[K, S],
+    initialCapacity = initialCapacity,
+    deltaChainThreshold = deltaChainThreshold)
+
+  def this(deltaChainThreshold: Int) = this(
+    initialCapacity = 64, deltaChainThreshold = deltaChainThreshold)
+
+  def this() = this(DELTA_CHAIN_LENGTH_THRESHOLD)
+
+  @transient @volatile private var deltaMap =
+    new OpenHashMap[K, StateInfo[S]](initialCapacity)
+
+  /** Get the session data if it exists */
+  override def get(key: K): Option[S] = {
+    val stateInfo = deltaMap(key)
+    if (stateInfo != null) {
+      if (!stateInfo.deleted) {
+        Some(stateInfo.data)
+      } else {
+        None
+      }
+    } else {
+      parentStateMap.get(key)
+    }
+  }
+
+  /** Get all the keys and states whose updated time is older than the give threshold time */
+  override def getByTime(threshUpdatedTime: Long): Iterator[(K, S, Long)] = {
+    val oldStates = parentStateMap.getByTime(threshUpdatedTime).filter { case (key, value, _) =>
+      !deltaMap.contains(key)
+    }
+
+    val updatedStates = deltaMap.iterator.filter { case (_, stateInfo) =>
+      !stateInfo.deleted && stateInfo.updateTime < threshUpdatedTime
+    }.map { case (key, stateInfo) =>
+      (key, stateInfo.data, stateInfo.updateTime)
+    }
+    oldStates ++ updatedStates
+  }
+
+  /** Get all the keys and states in this map. */
+  override def getAll(): Iterator[(K, S, Long)] = {
+
+    val oldStates = parentStateMap.getAll().filter { case (key, _, _) =>
+      !deltaMap.contains(key)
+    }
+
+    val updatedStates = deltaMap.iterator.filter { ! _._2.deleted }.map { case (key, stateInfo) =>
+      (key, stateInfo.data, stateInfo.updateTime)
+    }
+    oldStates ++ updatedStates
+  }
+
+  /** Add or update state */
+  override def put(key: K, state: S, updateTime: Long): Unit = {
+    val stateInfo = deltaMap(key)
+    if (stateInfo != null) {
+      stateInfo.update(state, updateTime)
+    } else {
+      deltaMap.update(key, new StateInfo(state, updateTime))
+    }
+  }
+
+  /** Remove a state */
+  override def remove(key: K): Unit = {
+    val stateInfo = deltaMap(key)
+    if (stateInfo != null) {
+      stateInfo.markDeleted()
+    } else {
+      val newInfo = new StateInfo[S](deleted = true)
+      deltaMap.update(key, newInfo)
+    }
+  }
+
+  /**
+   * Shallow copy the map to create a new session store. Updates to the new map
+   * should not mutate `this` map.
+   */
+  override def copy(): StateMap[K, S] = {
+    new OpenHashMapBasedStateMap[K, S](this, deltaChainThreshold = deltaChainThreshold)
+  }
+
+  /** Whether the delta chain lenght is long enough that it should be compacted */
+  def shouldCompact: Boolean = {
+    deltaChainLength >= deltaChainThreshold
+  }
+
+  /** Length of the delta chains of this map */
+  def deltaChainLength: Int = parentStateMap match {
+    case map: OpenHashMapBasedStateMap[_, _] => map.deltaChainLength + 1
+    case _ => 0
+  }
+
+  /**
+   * Approximate number of keys in the map. This is an overestimation that is mainly used to
+   * reserve capacity in a new map at delta compaction time.
+   */
+  def approxSize: Int = deltaMap.size + {
+    parentStateMap match {
+      case s: OpenHashMapBasedStateMap[_, _] => s.approxSize
+      case _ => 0
+    }
+  }
+
+  /** Get all the data of this map as string formatted as a tree based on the delta depth */
+  override def toDebugString(): String = {
+    val tabs = if (deltaChainLength > 0) {
+      ("    " * (deltaChainLength - 1)) + "+--- "
+    } else ""
+    parentStateMap.toDebugString() + "\n" + deltaMap.iterator.mkString(tabs, "\n" + tabs, "")
+  }
+
+  override def toString(): String = {
+    s"[${System.identityHashCode(this)}, ${System.identityHashCode(parentStateMap)}]"
+  }
+
+  /**
+   * Serialize the map data. Besides serialization, this method actually compact the deltas
+   * (if needed) in a single pass over all the data in the map.
+   */
+
+  private def writeObject(outputStream: ObjectOutputStream): Unit = {
+    // Write all the non-transient fields, especially class tags, etc.
+    outputStream.defaultWriteObject()
+
+    // Write the data in the delta of this state map
+    outputStream.writeInt(deltaMap.size)
+    val deltaMapIterator = deltaMap.iterator
+    var deltaMapCount = 0
+    while (deltaMapIterator.hasNext) {
+      deltaMapCount += 1
+      val (key, stateInfo) = deltaMapIterator.next()
+      outputStream.writeObject(key)
+      outputStream.writeObject(stateInfo)
+    }
+    assert(deltaMapCount == deltaMap.size)
+
+    // Write the data in the parent state map while copying the data into a new parent map for
+    // compaction (if needed)
+    val doCompaction = shouldCompact
+    val newParentSessionStore = if (doCompaction) {
+      val initCapacity = if (approxSize > 0) approxSize else 64
+      new OpenHashMapBasedStateMap[K, S](initialCapacity = initCapacity, deltaChainThreshold)
+    } else { null }
+
+    val iterOfActiveSessions = parentStateMap.getAll()
+
+    var parentSessionCount = 0
+
+    // First write the approximate size of the data to be written, so that readObject can
+    // allocate appropriately sized OpenHashMap.
+    outputStream.writeInt(approxSize)
+
+    while(iterOfActiveSessions.hasNext) {
+      parentSessionCount += 1
+
+      val (key, state, updateTime) = iterOfActiveSessions.next()
+      outputStream.writeObject(key)
+      outputStream.writeObject(state)
+      outputStream.writeLong(updateTime)
+
+      if (doCompaction) {
+        newParentSessionStore.deltaMap.update(
+          key, StateInfo(state, updateTime, deleted = false))
+      }
+    }
+
+    // Write the final limit marking object with the correct count of records written.
+    val limiterObj = new LimitMarker(parentSessionCount)
+    outputStream.writeObject(limiterObj)
+    if (doCompaction) {
+      parentStateMap = newParentSessionStore
+    }
+  }
+
+  /** Deserialize the map data. */
+  private def readObject(inputStream: ObjectInputStream): Unit = {
+
+    // Read the non-transient fields, especially class tags, etc.
+    inputStream.defaultReadObject()
+
+    // Read the data of the delta
+    val deltaMapSize = inputStream.readInt()
+    deltaMap = new OpenHashMap[K, StateInfo[S]]()
+    var deltaMapCount = 0
+    while (deltaMapCount < deltaMapSize) {
+      val key = inputStream.readObject().asInstanceOf[K]
+      val sessionInfo = inputStream.readObject().asInstanceOf[StateInfo[S]]
+      deltaMap.update(key, sessionInfo)
+      deltaMapCount += 1
+    }
+
+
+    // Read the data of the parent map. Keep reading records, until the limiter is reached
+    // First read the approximate number of records to expect and allocate properly size
+    // OpenHashMap
+    val parentSessionStoreSizeHint = inputStream.readInt()
+    val newParentSessionStore = new OpenHashMapBasedStateMap[K, S](
+      initialCapacity = parentSessionStoreSizeHint, deltaChainThreshold)
+
+    // Read the records until the limit marking object has been reached
+    var parentSessionLoopDone = false
+    while(!parentSessionLoopDone) {
+      val obj = inputStream.readObject()
+      if (obj.isInstanceOf[LimitMarker]) {
+        parentSessionLoopDone = true
+        val expectedCount = obj.asInstanceOf[LimitMarker].num
+        assert(expectedCount == newParentSessionStore.deltaMap.size)
+      } else {
+        val key = obj.asInstanceOf[K]
+        val state = inputStream.readObject().asInstanceOf[S]
+        val updateTime = inputStream.readLong()
+        newParentSessionStore.deltaMap.update(
+          key, StateInfo(state, updateTime, deleted = false))
+      }
+    }
+    parentStateMap = newParentSessionStore
+  }
+}
+
+/**
+ * Companion object of [[OpenHashMapBasedStateMap]] having associated helper
+ * classes and methods
+ */
+private[streaming] object OpenHashMapBasedStateMap {
+
+  /** Internal class to represent the state information */
+  case class StateInfo[S](
+      var data: S = null.asInstanceOf[S],
+      var updateTime: Long = -1,
+      var deleted: Boolean = false) {
+
+    def markDeleted(): Unit = {
+      deleted = true
+    }
+
+    def update(newData: S, newUpdateTime: Long): Unit = {
+      data = newData
+      updateTime = newUpdateTime
+      deleted = false
+    }
+  }
+
+  /**
+   * Internal class to represent a marker the demarkate the the end of all state data in the
+   * serialized bytes.
+   */
+  class LimitMarker(val num: Int) extends Serializable
+
+  val DELTA_CHAIN_LENGTH_THRESHOLD = 20
+}
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
new file mode 100644
index 000000000000..48d3b41b66cb
--- /dev/null
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
@@ -0,0 +1,314 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming
+
+import scala.collection.{immutable, mutable, Map}
+import scala.util.Random
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.streaming.util.{EmptyStateMap, OpenHashMapBasedStateMap, StateMap}
+import org.apache.spark.util.Utils
+
+class StateMapSuite extends SparkFunSuite {
+
+  test("EmptyStateMap") {
+    val map = new EmptyStateMap[Int, Int]
+    intercept[scala.NotImplementedError] {
+      map.put(1, 1, 1)
+    }
+    assert(map.get(1) === None)
+    assert(map.getByTime(10000).isEmpty)
+    assert(map.getAll().isEmpty)
+    map.remove(1)   // no exception
+    assert(map.copy().eq(map))
+  }
+
+  test("OpenHashMapBasedStateMap - put, get, getByTime, getAll, remove") {
+    val map = new OpenHashMapBasedStateMap[Int, Int]()
+
+    map.put(1, 100, 10)
+    assert(map.get(1) === Some(100))
+    assert(map.get(2) === None)
+    assert(map.getByTime(11).toSet === Set((1, 100, 10)))
+    assert(map.getByTime(10).toSet === Set.empty)
+    assert(map.getByTime(9).toSet === Set.empty)
+    assert(map.getAll().toSet === Set((1, 100, 10)))
+
+    map.put(2, 200, 20)
+    assert(map.getByTime(21).toSet === Set((1, 100, 10), (2, 200, 20)))
+    assert(map.getByTime(11).toSet === Set((1, 100, 10)))
+    assert(map.getByTime(10).toSet === Set.empty)
+    assert(map.getByTime(9).toSet === Set.empty)
+    assert(map.getAll().toSet === Set((1, 100, 10), (2, 200, 20)))
+
+    map.remove(1)
+    assert(map.get(1) === None)
+    assert(map.getAll().toSet === Set((2, 200, 20)))
+  }
+
+  test("OpenHashMapBasedStateMap - put, get, getByTime, getAll, remove with copy") {
+    val parentMap = new OpenHashMapBasedStateMap[Int, Int]()
+    parentMap.put(1, 100, 1)
+    parentMap.put(2, 200, 2)
+    parentMap.remove(1)
+
+    // Create child map and make changes
+    val map = parentMap.copy()
+    assert(map.get(1) === None)
+    assert(map.get(2) === Some(200))
+    assert(map.getByTime(10).toSet === Set((2, 200, 2)))
+    assert(map.getByTime(2).toSet === Set.empty)
+    assert(map.getAll().toSet === Set((2, 200, 2)))
+
+    // Add new items
+    map.put(3, 300, 3)
+    assert(map.get(3) === Some(300))
+    map.put(4, 400, 4)
+    assert(map.get(4) === Some(400))
+    assert(map.getByTime(10).toSet === Set((2, 200, 2), (3, 300, 3), (4, 400, 4)))
+    assert(map.getByTime(4).toSet === Set((2, 200, 2), (3, 300, 3)))
+    assert(map.getAll().toSet === Set((2, 200, 2), (3, 300, 3), (4, 400, 4)))
+    assert(parentMap.getAll().toSet === Set((2, 200, 2)))
+
+    // Remove items
+    map.remove(4)
+    assert(map.get(4) === None)       // item added in this map, then removed in this map
+    map.remove(2)
+    assert(map.get(2) === None)       // item removed in parent map, then added in this map
+    assert(map.getAll().toSet === Set((3, 300, 3)))
+    assert(parentMap.getAll().toSet === Set((2, 200, 2)))
+
+    // Update items
+    map.put(1, 1000, 100)
+    assert(map.get(1) === Some(1000)) // item removed in parent map, then added in this map
+    map.put(2, 2000, 200)
+    assert(map.get(2) === Some(2000)) // item added in parent map, then removed + added in this map
+    map.put(3, 3000, 300)
+    assert(map.get(3) === Some(3000)) // item added + updated in this map
+    map.put(4, 4000, 400)
+    assert(map.get(4) === Some(4000)) // item removed + updated in this map
+
+    assert(map.getAll().toSet ===
+      Set((1, 1000, 100), (2, 2000, 200), (3, 3000, 300), (4, 4000, 400)))
+    assert(parentMap.getAll().toSet === Set((2, 200, 2)))
+
+    map.remove(2)         // remove item present in parent map, so that its not visible in child map
+
+    // Create child map and see availability of items
+    val childMap = map.copy()
+    assert(childMap.getAll().toSet === map.getAll().toSet)
+    assert(childMap.get(1) === Some(1000))  // item removed in grandparent, but added in parent map
+    assert(childMap.get(2) === None)        // item added in grandparent, but removed in parent map
+    assert(childMap.get(3) === Some(3000))  // item added and updated in parent map
+
+    childMap.put(2, 20000, 200)
+    assert(childMap.get(2) === Some(20000)) // item map
+  }
+
+  test("OpenHashMapBasedStateMap - serializing and deserializing") {
+    val map1 = new OpenHashMapBasedStateMap[Int, Int]()
+    map1.put(1, 100, 1)
+    map1.put(2, 200, 2)
+
+    val map2 = map1.copy()
+    map2.put(3, 300, 3)
+    map2.put(4, 400, 4)
+
+    val map3 = map2.copy()
+    map3.put(3, 600, 3)
+    map3.remove(2)
+
+    // Do not test compaction
+    assert(map3.asInstanceOf[OpenHashMapBasedStateMap[_, _]].shouldCompact === false)
+
+    val deser_map3 = Utils.deserialize[StateMap[Int, Int]](
+      Utils.serialize(map3), Thread.currentThread().getContextClassLoader)
+    assertMap(deser_map3, map3, 1, "Deserialized map not same as original map")
+  }
+
+  test("OpenHashMapBasedStateMap - serializing and deserializing with compaction") {
+    val targetDeltaLength = 10
+    val deltaChainThreshold = 5
+
+    var map = new OpenHashMapBasedStateMap[Int, Int](
+      deltaChainThreshold = deltaChainThreshold)
+
+    // Make large delta chain with length more than deltaChainThreshold
+    for(i <- 1 to targetDeltaLength) {
+      map.put(Random.nextInt(), Random.nextInt(), 1)
+      map = map.copy().asInstanceOf[OpenHashMapBasedStateMap[Int, Int]]
+    }
+    assert(map.deltaChainLength > deltaChainThreshold)
+    assert(map.shouldCompact === true)
+
+    val deser_map = Utils.deserialize[OpenHashMapBasedStateMap[Int, Int]](
+      Utils.serialize(map), Thread.currentThread().getContextClassLoader)
+    assert(deser_map.deltaChainLength < deltaChainThreshold)
+    assert(deser_map.shouldCompact === false)
+    assertMap(deser_map, map, 1, "Deserialized + compacted map not same as original map")
+  }
+
+  test("OpenHashMapBasedStateMap - all possible sequences of operations with copies ") {
+    /*
+     * This tests the map using all permutations of sequences operations, across multiple map
+     * copies as well as between copies. It is to ensure complete coverage, though it is
+     * kind of hard to debug this. It is set up as follows.
+     *
+     * - For any key, there can be 2 types of update ops on a state map - put or remove
+     *
+     * - These operations are done on a test map in "sets". After each set, the map is "copied"
+     *   to create a new map, and the next set of operations are done on the new one. This tests
+     *   whether the map data persistes correctly across copies.
+     *
+     * - Within each set, there are a number of operations to test whether the map correctly
+     *   updates and removes data without affecting the parent state map.
+     *
+     * - Overall this creates (numSets * numOpsPerSet) operations, each of which that can 2 types
+     *   of operations. This leads to a total of [2 ^ (numSets * numOpsPerSet)] different sequence
+     *   of operations, which we will test with different keys.
+     *
+     * Example: With numSets = 2, and numOpsPerSet = 2 give numTotalOps = 4. This means that
+     * 2 ^ 4 = 16 possible permutations needs to be tested using 16 keys.
+     * _______________________________________________
+     * |         |      Set1       |     Set2        |
+     * |         |-----------------|-----------------|
+     * |         |   Op1    Op2   |c|   Op3    Op4   |
+     * |---------|----------------|o|----------------|
+     * | key 0   |   put    put   |p|   put    put   |
+     * | key 1   |   put    put   |y|   put    rem   |
+     * | key 2   |   put    put   | |   rem    put   |
+     * | key 3   |   put    put   |t|   rem    rem   |
+     * | key 4   |   put    rem   |h|   put    put   |
+     * | key 5   |   put    rem   |e|   put    rem   |
+     * | key 6   |   put    rem   | |   rem    put   |
+     * | key 7   |   put    rem   |s|   rem    rem   |
+     * | key 8   |   rem    put   |t|   put    put   |
+     * | key 9   |   rem    put   |a|   put    rem   |
+     * | key 10  |   rem    put   |t|   rem    put   |
+     * | key 11  |   rem    put   |e|   rem    rem   |
+     * | key 12  |   rem    rem   | |   put    put   |
+     * | key 13  |   rem    rem   |m|   put    rem   |
+     * | key 14  |   rem    rem   |a|   rem    put   |
+     * | key 15  |   rem    rem   |p|   rem    rem   |
+     * |_________|________________|_|________________|
+     */
+
+    val numTypeMapOps = 2   // 0 = put a new value, 1 = remove value
+    val numSets = 3
+    val numOpsPerSet = 3    // to test seq of ops like update -> remove -> update in same set
+    val numTotalOps = numOpsPerSet * numSets
+    val numKeys = math.pow(numTypeMapOps, numTotalOps).toInt  // to get all combinations of ops
+
+    val refMap = new mutable.HashMap[Int, (Int, Long)]()
+    var prevSetRefMap: immutable.Map[Int, (Int, Long)] = null
+
+    var stateMap: StateMap[Int, Int] = new OpenHashMapBasedStateMap[Int, Int]()
+    var prevSetStateMap: StateMap[Int, Int] = null
+
+    var time = 1L
+
+    for (setId <- 0 until numSets) {
+      for (opInSetId <- 0 until numOpsPerSet) {
+        val opId = setId * numOpsPerSet + opInSetId
+        for (keyId <- 0 until numKeys) {
+          time += 1
+          // Find the operation type that needs to be done
+          // This is similar to finding the nth bit value of a binary number
+          // E.g.  nth bit from the right of any binary number B is [ B / (2 ^ (n - 1)) ] % 2
+          val opCode =
+            (keyId / math.pow(numTypeMapOps, numTotalOps - opId - 1).toInt) % numTypeMapOps
+          opCode match {
+            case 0 =>
+              val value = Random.nextInt()
+              stateMap.put(keyId, value, time)
+              refMap.put(keyId, (value, time))
+            case 1 =>
+              stateMap.remove(keyId)
+              refMap.remove(keyId)
+          }
+        }
+
+        // Test whether the current state map after all key updates is correct
+        assertMap(stateMap, refMap, time, "State map does not match reference map")
+
+        // Test whether the previous map before copy has not changed
+        if (prevSetStateMap != null && prevSetRefMap != null) {
+          assertMap(prevSetStateMap, prevSetRefMap, time,
+            "Parent state map somehow got modified, does not match corresponding reference map")
+        }
+      }
+
+      // Copy the map and remember the previous maps for future tests
+      prevSetStateMap = stateMap
+      prevSetRefMap = refMap.toMap
+      stateMap = stateMap.copy()
+
+      // Assert that the copied map has the same data
+      assertMap(stateMap, prevSetRefMap, time,
+        "State map does not match reference map after copying")
+    }
+    assertMap(stateMap, refMap.toMap, time, "Final state map does not match reference map")
+  }
+
+  // Assert whether all the data and operations on a state map matches that of a reference state map
+  private def assertMap(
+      mapToTest: StateMap[Int, Int],
+      refMapToTestWith: StateMap[Int, Int],
+      time: Long,
+      msg: String): Unit = {
+    withClue(msg) {
+      // Assert all the data is same as the reference map
+      assert(mapToTest.getAll().toSet === refMapToTestWith.getAll().toSet)
+
+      // Assert that get on every key returns the right value
+      for (keyId <- refMapToTestWith.getAll().map { _._1 }) {
+        assert(mapToTest.get(keyId) === refMapToTestWith.get(keyId))
+      }
+
+      // Assert that every time threshold returns the correct data
+      for (t <- 0L to (time + 1)) {
+        assert(mapToTest.getByTime(t).toSet ===  refMapToTestWith.getByTime(t).toSet)
+      }
+    }
+  }
+
+  // Assert whether all the data and operations on a state map matches that of a reference map
+  private def assertMap(
+      mapToTest: StateMap[Int, Int],
+      refMapToTestWith: Map[Int, (Int, Long)],
+      time: Long,
+      msg: String): Unit = {
+    withClue(msg) {
+      // Assert all the data is same as the reference map
+      assert(mapToTest.getAll().toSet ===
+        refMapToTestWith.iterator.map { x => (x._1, x._2._1, x._2._2) }.toSet)
+
+      // Assert that get on every key returns the right value
+      for (keyId <- refMapToTestWith.keys) {
+        assert(mapToTest.get(keyId) === refMapToTestWith.get(keyId).map { _._1 })
+      }
+
+      // Assert that every time threshold returns the correct data
+      for (t <- 0L to (time + 1)) {
+        val expectedRecords =
+          refMapToTestWith.iterator.filter { _._2._2 < t }.map { x => (x._1, x._2._1, x._2._2) }
+        assert(mapToTest.getByTime(t).toSet ===  expectedRecords.toSet)
+      }
+    }
+  }
+}
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
new file mode 100644
index 000000000000..e3072b444284
--- /dev/null
+++ b/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
@@ -0,0 +1,494 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming
+
+import java.io.File
+
+import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
+import scala.reflect.ClassTag
+
+import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll}
+
+import org.apache.spark.streaming.dstream.{TrackStateDStream, TrackStateDStreamImpl}
+import org.apache.spark.util.{ManualClock, Utils}
+import org.apache.spark.{SparkConf, SparkContext, SparkFunSuite}
+
+class TrackStateByKeySuite extends SparkFunSuite with BeforeAndAfterAll with BeforeAndAfter {
+
+  private var sc: SparkContext = null
+  private var ssc: StreamingContext = null
+  private var checkpointDir: File = null
+  private val batchDuration = Seconds(1)
+
+  before {
+    StreamingContext.getActive().foreach {
+      _.stop(stopSparkContext = false)
+    }
+    checkpointDir = Utils.createTempDir("checkpoint")
+
+    ssc = new StreamingContext(sc, batchDuration)
+    ssc.checkpoint(checkpointDir.toString)
+  }
+
+  after {
+    StreamingContext.getActive().foreach {
+      _.stop(stopSparkContext = false)
+    }
+  }
+
+  override def beforeAll(): Unit = {
+    val conf = new SparkConf().setMaster("local").setAppName("TrackStateByKeySuite")
+    conf.set("spark.streaming.clock", classOf[ManualClock].getName())
+    sc = new SparkContext(conf)
+  }
+
+  test("state - get, exists, update, remove, ") {
+    var state: StateImpl[Int] = null
+
+    def testState(
+        expectedData: Option[Int],
+        shouldBeUpdated: Boolean = false,
+        shouldBeRemoved: Boolean = false,
+        shouldBeTimingOut: Boolean = false
+      ): Unit = {
+      if (expectedData.isDefined) {
+        assert(state.exists)
+        assert(state.get() === expectedData.get)
+        assert(state.getOption() === expectedData)
+        assert(state.getOption.getOrElse(-1) === expectedData.get)
+      } else {
+        assert(!state.exists)
+        intercept[NoSuchElementException] {
+          state.get()
+        }
+        assert(state.getOption() === None)
+        assert(state.getOption.getOrElse(-1) === -1)
+      }
+
+      assert(state.isTimingOut() === shouldBeTimingOut)
+      if (shouldBeTimingOut) {
+        intercept[IllegalArgumentException] {
+          state.remove()
+        }
+        intercept[IllegalArgumentException] {
+          state.update(-1)
+        }
+      }
+
+      assert(state.isUpdated() === shouldBeUpdated)
+
+      assert(state.isRemoved() === shouldBeRemoved)
+      if (shouldBeRemoved) {
+        intercept[IllegalArgumentException] {
+          state.remove()
+        }
+        intercept[IllegalArgumentException] {
+          state.update(-1)
+        }
+      }
+    }
+
+    state = new StateImpl[Int]()
+    testState(None)
+
+    state.wrap(None)
+    testState(None)
+
+    state.wrap(Some(1))
+    testState(Some(1))
+
+    state.update(2)
+    testState(Some(2), shouldBeUpdated = true)
+
+    state = new StateImpl[Int]()
+    state.update(2)
+    testState(Some(2), shouldBeUpdated = true)
+
+    state.remove()
+    testState(None, shouldBeRemoved = true)
+
+    state.wrapTiminoutState(3)
+    testState(Some(3), shouldBeTimingOut = true)
+  }
+
+  test("trackStateByKey - basic operations with simple API") {
+    val inputData =
+      Seq(
+        Seq(),
+        Seq("a"),
+        Seq("a", "b"),
+        Seq("a", "b", "c"),
+        Seq("a", "b"),
+        Seq("a"),
+        Seq()
+      )
+
+    val outputData =
+      Seq(
+        Seq(),
+        Seq(1),
+        Seq(2, 1),
+        Seq(3, 2, 1),
+        Seq(4, 3),
+        Seq(5),
+        Seq()
+      )
+
+    val stateData =
+      Seq(
+        Seq(),
+        Seq(("a", 1)),
+        Seq(("a", 2), ("b", 1)),
+        Seq(("a", 3), ("b", 2), ("c", 1)),
+        Seq(("a", 4), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1))
+      )
+
+    // state maintains running count, and updated count is returned
+    val trackStateFunc = (value: Option[Int], state: State[Int]) => {
+      val sum = value.getOrElse(0) + state.getOption.getOrElse(0)
+      state.update(sum)
+      sum
+    }
+
+    testOperation[String, Int, Int](
+      inputData, StateSpec.function(trackStateFunc), outputData, stateData)
+  }
+
+  test("trackStateByKey - basic operations with advanced API") {
+    val inputData =
+      Seq(
+        Seq(),
+        Seq("a"),
+        Seq("a", "b"),
+        Seq("a", "b", "c"),
+        Seq("a", "b"),
+        Seq("a"),
+        Seq()
+      )
+
+    val outputData =
+      Seq(
+        Seq(),
+        Seq("aa"),
+        Seq("aa", "bb"),
+        Seq("aa", "bb", "cc"),
+        Seq("aa", "bb"),
+        Seq("aa"),
+        Seq()
+      )
+
+    val stateData =
+      Seq(
+        Seq(),
+        Seq(("a", 1)),
+        Seq(("a", 2), ("b", 1)),
+        Seq(("a", 3), ("b", 2), ("c", 1)),
+        Seq(("a", 4), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1))
+      )
+
+    // state maintains running count, key string doubled and returned
+    val trackStateFunc = (batchTime: Time, key: String, value: Option[Int], state: State[Int]) => {
+      val sum = value.getOrElse(0) + state.getOption.getOrElse(0)
+      state.update(sum)
+      Some(key * 2)
+    }
+
+    testOperation(inputData, StateSpec.function(trackStateFunc), outputData, stateData)
+  }
+
+  test("trackStateByKey - type inferencing and class tags") {
+
+    // Simple track state function with value as Int, state as Double and emitted type as Double
+    val simpleFunc = (value: Option[Int], state: State[Double]) => {
+      0L
+    }
+
+    // Advanced track state function with key as String, value as Int, state as Double and
+    // emitted type as Double
+    val advancedFunc = (time: Time, key: String, value: Option[Int], state: State[Double]) => {
+      Some(0L)
+    }
+
+    def testTypes(dstream: TrackStateDStream[_, _, _, _]): Unit = {
+      val dstreamImpl = dstream.asInstanceOf[TrackStateDStreamImpl[_, _, _, _]]
+      assert(dstreamImpl.keyClass === classOf[String])
+      assert(dstreamImpl.valueClass === classOf[Int])
+      assert(dstreamImpl.stateClass === classOf[Double])
+      assert(dstreamImpl.emittedClass === classOf[Long])
+    }
+
+    val inputStream = new TestInputStream[(String, Int)](ssc, Seq.empty, numPartitions = 2)
+
+    // Defining StateSpec inline with trackStateByKey and simple function implicitly gets the types
+    val simpleFunctionStateStream1 = inputStream.trackStateByKey(
+      StateSpec.function(simpleFunc).numPartitions(1))
+    testTypes(simpleFunctionStateStream1)
+
+    // Separately defining StateSpec with simple function requires explicitly specifying types
+    val simpleFuncSpec = StateSpec.function[String, Int, Double, Long](simpleFunc)
+    val simpleFunctionStateStream2 = inputStream.trackStateByKey(simpleFuncSpec)
+    testTypes(simpleFunctionStateStream2)
+
+    // Separately defining StateSpec with advanced function implicitly gets the types
+    val advFuncSpec1 = StateSpec.function(advancedFunc)
+    val advFunctionStateStream1 = inputStream.trackStateByKey(advFuncSpec1)
+    testTypes(advFunctionStateStream1)
+
+    // Defining StateSpec inline with trackStateByKey and advanced func implicitly gets the types
+    val advFunctionStateStream2 = inputStream.trackStateByKey(
+      StateSpec.function(simpleFunc).numPartitions(1))
+    testTypes(advFunctionStateStream2)
+
+    // Defining StateSpec inline with trackStateByKey and advanced func implicitly gets the types
+    val advFuncSpec2 = StateSpec.function[String, Int, Double, Long](advancedFunc)
+    val advFunctionStateStream3 = inputStream.trackStateByKey[Double, Long](advFuncSpec2)
+    testTypes(advFunctionStateStream3)
+  }
+
+  test("trackStateByKey - states as emitted records") {
+    val inputData =
+      Seq(
+        Seq(),
+        Seq("a"),
+        Seq("a", "b"),
+        Seq("a", "b", "c"),
+        Seq("a", "b"),
+        Seq("a"),
+        Seq()
+      )
+
+    val outputData =
+      Seq(
+        Seq(),
+        Seq(("a", 1)),
+        Seq(("a", 2), ("b", 1)),
+        Seq(("a", 3), ("b", 2), ("c", 1)),
+        Seq(("a", 4), ("b", 3)),
+        Seq(("a", 5)),
+        Seq()
+      )
+
+    val stateData =
+      Seq(
+        Seq(),
+        Seq(("a", 1)),
+        Seq(("a", 2), ("b", 1)),
+        Seq(("a", 3), ("b", 2), ("c", 1)),
+        Seq(("a", 4), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1)),
+        Seq(("a", 5), ("b", 3), ("c", 1))
+      )
+
+    val trackStateFunc = (time: Time, key: String, value: Option[Int], state: State[Int]) => {
+      val sum = value.getOrElse(0) + state.getOption.getOrElse(0)
+      val output = (key, sum)
+      state.update(sum)
+      Some(output)
+    }
+
+    testOperation(inputData, StateSpec.function(trackStateFunc), outputData, stateData)
+  }
+
+  test("trackStateByKey - initial states, with nothing emitted") {
+
+    val initialState = Seq(("a", 5), ("b", 10), ("c", -20), ("d", 0))
+
+    val inputData =
+      Seq(
+        Seq(),
+        Seq("a"),
+        Seq("a", "b"),
+        Seq("a", "b", "c"),
+        Seq("a", "b"),
+        Seq("a"),
+        Seq()
+      )
+
+    val outputData = Seq.fill(inputData.size)(Seq.empty[Int])
+
+    val stateData =
+      Seq(
+        Seq(("a", 5), ("b", 10), ("c", -20), ("d", 0)),
+        Seq(("a", 6), ("b", 10), ("c", -20), ("d", 0)),
+        Seq(("a", 7), ("b", 11), ("c", -20), ("d", 0)),
+        Seq(("a", 8), ("b", 12), ("c", -19), ("d", 0)),
+        Seq(("a", 9), ("b", 13), ("c", -19), ("d", 0)),
+        Seq(("a", 10), ("b", 13), ("c", -19), ("d", 0)),
+        Seq(("a", 10), ("b", 13), ("c", -19), ("d", 0))
+      )
+
+    val trackStateFunc = (time: Time, key: String, value: Option[Int], state: State[Int]) => {
+      val sum = value.getOrElse(0) + state.getOption.getOrElse(0)
+      val output = (key, sum)
+      state.update(sum)
+      None.asInstanceOf[Option[Int]]
+    }
+
+    val trackStateSpec = StateSpec.function(trackStateFunc).initialState(sc.makeRDD(initialState))
+    testOperation(inputData, trackStateSpec, outputData, stateData)
+  }
+
+  test("trackStateByKey - state removing") {
+    val inputData =
+      Seq(
+        Seq(),
+        Seq("a"),
+        Seq("a", "b"), // a will be removed
+        Seq("a", "b", "c"), // b will be removed
+        Seq("a", "b", "c"), // a and c will be removed
+        Seq("a", "b"), // b will be removed
+        Seq("a"), // a will be removed
+        Seq()
+      )
+
+    // States that were removed
+    val outputData =
+      Seq(
+        Seq(),
+        Seq(),
+        Seq("a"),
+        Seq("b"),
+        Seq("a", "c"),
+        Seq("b"),
+        Seq("a"),
+        Seq()
+      )
+
+    val stateData =
+      Seq(
+        Seq(),
+        Seq(("a", 1)),
+        Seq(("b", 1)),
+        Seq(("a", 1), ("c", 1)),
+        Seq(("b", 1)),
+        Seq(("a", 1)),
+        Seq(),
+        Seq()
+      )
+
+    val trackStateFunc = (time: Time, key: String, value: Option[Int], state: State[Int]) => {
+      if (state.exists) {
+        state.remove()
+        Some(key)
+      } else {
+        state.update(value.get)
+        None
+      }
+    }
+
+    testOperation(
+      inputData, StateSpec.function(trackStateFunc).numPartitions(1), outputData, stateData)
+  }
+
+  test("trackStateByKey - state timing out") {
+    val inputData =
+      Seq(
+        Seq("a", "b", "c"),
+        Seq("a", "b"),
+        Seq("a"),
+        Seq(), // c will time out
+        Seq(), // b will time out
+        Seq("a") // a will not time out
+      ) ++ Seq.fill(20)(Seq("a")) // a will continue to stay active
+
+    val trackStateFunc = (time: Time, key: String, value: Option[Int], state: State[Int]) => {
+      if (value.isDefined) {
+        state.update(1)
+      }
+      if (state.isTimingOut) {
+        Some(key)
+      } else {
+        None
+      }
+    }
+
+    val (collectedOutputs, collectedStateSnapshots) = getOperationOutput(
+      inputData, StateSpec.function(trackStateFunc).timeout(Seconds(3)), 20)
+
+    // b and c should be emitted once each, when they were marked as expired
+    assert(collectedOutputs.flatten.sorted === Seq("b", "c"))
+
+    // States for a, b, c should be defined at one point of time
+    assert(collectedStateSnapshots.exists {
+      _.toSet == Set(("a", 1), ("b", 1), ("c", 1))
+    })
+
+    // Finally state should be defined only for a
+    assert(collectedStateSnapshots.last.toSet === Set(("a", 1)))
+  }
+
+
+  private def testOperation[K: ClassTag, S: ClassTag, T: ClassTag](
+      input: Seq[Seq[K]],
+      trackStateSpec: StateSpec[K, Int, S, T],
+      expectedOutputs: Seq[Seq[T]],
+      expectedStateSnapshots: Seq[Seq[(K, S)]]
+    ): Unit = {
+    require(expectedOutputs.size == expectedStateSnapshots.size)
+
+    val (collectedOutputs, collectedStateSnapshots) =
+      getOperationOutput(input, trackStateSpec, expectedOutputs.size)
+    assert(expectedOutputs, collectedOutputs, "outputs")
+    assert(expectedStateSnapshots, collectedStateSnapshots, "state snapshots")
+  }
+
+  private def getOperationOutput[K: ClassTag, S: ClassTag, T: ClassTag](
+      input: Seq[Seq[K]],
+      trackStateSpec: StateSpec[K, Int, S, T],
+      numBatches: Int
+    ): (Seq[Seq[T]], Seq[Seq[(K, S)]]) = {
+
+    // Setup the stream computation
+    val inputStream = new TestInputStream(ssc, input, numPartitions = 2)
+    val trackeStateStream = inputStream.map(x => (x, 1)).trackStateByKey(trackStateSpec)
+    val collectedOutputs = new ArrayBuffer[Seq[T]] with SynchronizedBuffer[Seq[T]]
+    val outputStream = new TestOutputStream(trackeStateStream, collectedOutputs)
+    val collectedStateSnapshots = new ArrayBuffer[Seq[(K, S)]] with SynchronizedBuffer[Seq[(K, S)]]
+    val stateSnapshotStream = new TestOutputStream(
+      trackeStateStream.stateSnapshots(), collectedStateSnapshots)
+    outputStream.register()
+    stateSnapshotStream.register()
+
+    val batchCounter = new BatchCounter(ssc)
+    ssc.start()
+
+    val clock = ssc.scheduler.clock.asInstanceOf[ManualClock]
+    clock.advance(batchDuration.milliseconds * numBatches)
+
+    batchCounter.waitUntilBatchesCompleted(numBatches, 10000)
+    (collectedOutputs, collectedStateSnapshots)
+  }
+
+  private def assert[U](expected: Seq[Seq[U]], collected: Seq[Seq[U]], typ: String) {
+    val debugString = "\nExpected:\n" + expected.mkString("\n") +
+      "\nCollected:\n" + collected.mkString("\n")
+    assert(expected.size === collected.size,
+      s"number of collected $typ (${collected.size}) different from expected (${expected.size})" +
+        debugString)
+    expected.zip(collected).foreach { case (c, e) =>
+      assert(c.toSet === e.toSet,
+        s"collected $typ is different from expected $debugString"
+      )
+    }
+  }
+}
+
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
new file mode 100644
index 000000000000..fc5f26607ef9
--- /dev/null
+++ b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
@@ -0,0 +1,193 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.rdd
+
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.ClassTag
+
+import org.scalatest.BeforeAndAfterAll
+
+import org.apache.spark.rdd.RDD
+import org.apache.spark.streaming.{Time, State}
+import org.apache.spark.{HashPartitioner, SparkConf, SparkContext, SparkFunSuite}
+
+class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
+
+  private var sc = new SparkContext(
+    new SparkConf().setMaster("local").setAppName("TrackStateRDDSuite"))
+
+  override def afterAll(): Unit = {
+    sc.stop()
+  }
+
+  test("creation from pair RDD") {
+    val data = Seq((1, "1"), (2, "2"), (3, "3"))
+    val partitioner = new HashPartitioner(10)
+    val rdd = TrackStateRDD.createFromPairRDD[Int, Int, String, Int](
+      sc.parallelize(data), partitioner, Time(123))
+    assertRDD[Int, Int, String, Int](rdd, data.map { x => (x._1, x._2, 123)}.toSet, Set.empty)
+    assert(rdd.partitions.size === partitioner.numPartitions)
+
+    assert(rdd.partitioner === Some(partitioner))
+  }
+
+  test("states generated by TrackStateRDD") {
+    val initStates = Seq(("k1", 0), ("k2", 0))
+    val initTime = 123
+    val initStateWthTime = initStates.map { x => (x._1, x._2, initTime) }.toSet
+    val partitioner = new HashPartitioner(2)
+    val initStateRDD = TrackStateRDD.createFromPairRDD[String, Int, Int, Int](
+      sc.parallelize(initStates), partitioner, Time(initTime)).persist()
+    assertRDD(initStateRDD, initStateWthTime, Set.empty)
+
+    val updateTime = 345
+
+    /**
+     * Test that the test state RDD, when operated with new data,
+     * creates a new state RDD with expected states
+     */
+    def testStateUpdates(
+        testStateRDD: TrackStateRDD[String, Int, Int, Int],
+        testData: Seq[(String, Int)],
+        expectedStates: Set[(String, Int, Int)]): TrackStateRDD[String, Int, Int, Int] = {
+
+      // Persist the test TrackStateRDD so that its not recomputed while doing the next operation.
+      // This is to make sure that we only track which state keys are being touched in the next op.
+      testStateRDD.persist().count()
+
+      // To track which keys are being touched
+      TrackStateRDDSuite.touchedStateKeys.clear()
+
+      val trackingFunc = (time: Time, key: String, data: Option[Int], state: State[Int]) => {
+
+        // Track the key that has been touched
+        TrackStateRDDSuite.touchedStateKeys += key
+
+        // If the data is 0, do not do anything with the state
+        // else if the data is 1, increment the state if it exists, or set new state to 0
+        // else if the data is 2, remove the state if it exists
+        data match {
+          case Some(1) =>
+            if (state.exists()) { state.update(state.get + 1) }
+            else state.update(0)
+          case Some(2) =>
+            state.remove()
+          case _ =>
+        }
+        None.asInstanceOf[Option[Int]]  // Do not return anything, not being tested
+      }
+      val newDataRDD = sc.makeRDD(testData).partitionBy(testStateRDD.partitioner.get)
+
+      // Assert that the new state RDD has expected state data
+      val newStateRDD = assertOperation(
+        testStateRDD, newDataRDD, trackingFunc, updateTime, expectedStates, Set.empty)
+
+      // Assert that the function was called only for the keys present in the data
+      assert(TrackStateRDDSuite.touchedStateKeys.size === testData.size,
+        "More number of keys are being touched than that is expected")
+      assert(TrackStateRDDSuite.touchedStateKeys.toSet === testData.toMap.keys,
+        "Keys not in the data are being touched unexpectedly")
+
+      // Assert that the test RDD's data has not changed
+      assertRDD(initStateRDD, initStateWthTime, Set.empty)
+      newStateRDD
+    }
+
+    // Test no-op, no state should change
+    testStateUpdates(initStateRDD, Seq(), initStateWthTime)   // should not scan any state
+    testStateUpdates(
+      initStateRDD, Seq(("k1", 0)), initStateWthTime)         // should not update existing state
+    testStateUpdates(
+      initStateRDD, Seq(("k3", 0)), initStateWthTime)         // should not create new state
+
+    // Test creation of new state
+    val rdd1 = testStateUpdates(initStateRDD, Seq(("k3", 1)), // should create k3's state as 0
+      Set(("k1", 0, initTime), ("k2", 0, initTime), ("k3", 0, updateTime)))
+
+    val rdd2 = testStateUpdates(rdd1, Seq(("k4", 1)),         // should create k4's state as 0
+      Set(("k1", 0, initTime), ("k2", 0, initTime), ("k3", 0, updateTime), ("k4", 0, updateTime)))
+
+    // Test updating of state
+    val rdd3 = testStateUpdates(
+      initStateRDD, Seq(("k1", 1)),                   // should increment k1's state 0 -> 1
+      Set(("k1", 1, updateTime), ("k2", 0, initTime)))
+
+    val rdd4 = testStateUpdates(rdd3,
+      Seq(("x", 0), ("k2", 1), ("k2", 1), ("k3", 1)),  // should update k2, 0 -> 2 and create k3, 0
+      Set(("k1", 1, updateTime), ("k2", 2, updateTime), ("k3", 0, updateTime)))
+
+    val rdd5 = testStateUpdates(
+      rdd4, Seq(("k3", 1)),                           // should update k3's state 0 -> 2
+      Set(("k1", 1, updateTime), ("k2", 2, updateTime), ("k3", 1, updateTime)))
+
+    // Test removing of state
+    val rdd6 = testStateUpdates(                      // should remove k1's state
+      initStateRDD, Seq(("k1", 2)), Set(("k2", 0, initTime)))
+
+    val rdd7 = testStateUpdates(                      // should remove k2's state
+      rdd6, Seq(("k2", 2), ("k0", 2), ("k3", 1)), Set(("k3", 0, updateTime)))
+
+    val rdd8 = testStateUpdates(
+      rdd7, Seq(("k3", 2)), Set()                     //
+    )
+  }
+
+  /** Assert whether the `trackStateByKey` operation generates expected results */
+  private def assertOperation[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
+      testStateRDD: TrackStateRDD[K, V, S, T],
+      newDataRDD: RDD[(K, V)],
+      trackStateFunc: (Time, K, Option[V], State[S]) => Option[T],
+      currentTime: Long,
+      expectedStates: Set[(K, S, Int)],
+      expectedEmittedRecords: Set[T],
+      doFullScan: Boolean = false
+    ): TrackStateRDD[K, V, S, T] = {
+
+    val partitionedNewDataRDD = if (newDataRDD.partitioner != testStateRDD.partitioner) {
+      newDataRDD.partitionBy(testStateRDD.partitioner.get)
+    } else {
+      newDataRDD
+    }
+
+    val newStateRDD = new TrackStateRDD[K, V, S, T](
+      testStateRDD, newDataRDD, trackStateFunc, Time(currentTime), None)
+    if (doFullScan) newStateRDD.setFullScan()
+
+    // Persist to make sure that it gets computed only once and we can track precisely how many
+    // state keys the computing touched
+    newStateRDD.persist()
+    assertRDD(newStateRDD, expectedStates, expectedEmittedRecords)
+    newStateRDD
+  }
+
+  /** Assert whether the [[TrackStateRDD]] has the expected state ad emitted records */
+  private def assertRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
+      trackStateRDD: TrackStateRDD[K, V, S, T],
+      expectedStates: Set[(K, S, Int)],
+      expectedEmittedRecords: Set[T]): Unit = {
+    val states = trackStateRDD.flatMap { _.stateMap.getAll() }.collect().toSet
+    val emittedRecords = trackStateRDD.flatMap { _.emittedRecords }.collect().toSet
+    assert(states === expectedStates, "states after track state operation were not as expected")
+    assert(emittedRecords === expectedEmittedRecords,
+      "emitted records after track state operation were not as expected")
+  }
+}
+
+object TrackStateRDDSuite {
+  private val touchedStateKeys = new ArrayBuffer[String]()
+}

From 1bc41125ee6306e627be212969854f639969c440 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Wed, 11 Nov 2015 16:46:04 +0800
Subject: [PATCH 624/896] [SPARK-11500][SQL] Not deterministic order of columns
 when using merging schemas.

https://issues.apache.org/jira/browse/SPARK-11500

As filed in SPARK-11500, if merging schemas is enabled, the order of files to touch is a matter which might affect the ordering of the output columns.

This was mostly because of the use of `Set` and `Map` so I replaced them to `LinkedHashSet` and `LinkedHashMap` to keep the insertion order.

Also, I changed `reduceOption` to `reduceLeftOption`, and replaced the order of `filesToTouch` from `metadataStatuses ++ commonMetadataStatuses ++ needMerged` to  `needMerged ++ metadataStatuses ++ commonMetadataStatuses` in order to touch the part-files first which always have the schema in footers whereas the others might not exist.

One nit is, If merging schemas is not enabled, but when multiple files are given, there is no guarantee of the output order, since there might not be a summary file for the first file, which ends up putting ahead the columns of the other files.

However, I thought this should be okay since disabling merging schemas means (assumes) all the files have the same schemas.

In addition, in the test code for this, I only checked the names of fields.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #9517 from HyukjinKwon/SPARK-11500.
---
 .../datasources/parquet/ParquetRelation.scala | 29 +++++++++++++++----
 .../apache/spark/sql/sources/interfaces.scala | 22 +++++++-------
 .../ParquetHadoopFsRelationSuite.scala        | 21 +++++++++++++-
 3 files changed, 55 insertions(+), 17 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 5a7c6b95b565..21337b2932aa 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -383,7 +383,7 @@ private[sql] class ParquetRelation(
     var schema: StructType = _
 
     // Cached leaves
-    var cachedLeaves: Set[FileStatus] = null
+    var cachedLeaves: mutable.LinkedHashSet[FileStatus] = null
 
     /**
      * Refreshes `FileStatus`es, footers, partition spec, and table schema.
@@ -396,13 +396,13 @@ private[sql] class ParquetRelation(
         !cachedLeaves.equals(currentLeafStatuses)
 
       if (leafStatusesChanged) {
-        cachedLeaves = currentLeafStatuses.toIterator.toSet
+        cachedLeaves = currentLeafStatuses
 
         // Lists `FileStatus`es of all leaf nodes (files) under all base directories.
         val leaves = currentLeafStatuses.filter { f =>
           isSummaryFile(f.getPath) ||
             !(f.getPath.getName.startsWith("_") || f.getPath.getName.startsWith("."))
-        }.toArray
+        }.toArray.sortBy(_.getPath.toString)
 
         dataStatuses = leaves.filterNot(f => isSummaryFile(f.getPath))
         metadataStatuses =
@@ -465,13 +465,30 @@ private[sql] class ParquetRelation(
           // You should enable this configuration only if you are very sure that for the parquet
           // part-files to read there are corresponding summary files containing correct schema.
 
+          // As filed in SPARK-11500, the order of files to touch is a matter, which might affect
+          // the ordering of the output columns. There are several things to mention here.
+          //
+          //  1. If mergeRespectSummaries config is false, then it merges schemas by reducing from
+          //     the first part-file so that the columns of the lexicographically first file show
+          //     first.
+          //
+          //  2. If mergeRespectSummaries config is true, then there should be, at least,
+          //     "_metadata"s for all given files, so that we can ensure the columns of
+          //     the lexicographically first file show first.
+          //
+          //  3. If shouldMergeSchemas is false, but when multiple files are given, there is
+          //     no guarantee of the output order, since there might not be a summary file for the
+          //     lexicographically first file, which ends up putting ahead the columns of
+          //     the other files. However, this should be okay since not enabling
+          //     shouldMergeSchemas means (assumes) all the files have the same schemas.
+
           val needMerged: Seq[FileStatus] =
             if (mergeRespectSummaries) {
               Seq()
             } else {
               dataStatuses
             }
-          (metadataStatuses ++ commonMetadataStatuses ++ needMerged).toSeq
+          needMerged ++ metadataStatuses ++ commonMetadataStatuses
         } else {
           // Tries any "_common_metadata" first. Parquet files written by old versions or Parquet
           // don't have this.
@@ -768,10 +785,10 @@ private[sql] object ParquetRelation extends Logging {
 
           footers.map { footer =>
             ParquetRelation.readSchemaFromFooter(footer, converter)
-          }.reduceOption(_ merge _).iterator
+          }.reduceLeftOption(_ merge _).iterator
         }.collect()
 
-    partiallyMergedSchemas.reduceOption(_ merge _)
+    partiallyMergedSchemas.reduceLeftOption(_ merge _)
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index e296d631f0f3..5b8841bc154a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -428,11 +428,11 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
   private var _partitionSpec: PartitionSpec = _
 
   private class FileStatusCache {
-    var leafFiles = mutable.Map.empty[Path, FileStatus]
+    var leafFiles = mutable.LinkedHashMap.empty[Path, FileStatus]
 
     var leafDirToChildrenFiles = mutable.Map.empty[Path, Array[FileStatus]]
 
-    private def listLeafFiles(paths: Array[String]): Set[FileStatus] = {
+    private def listLeafFiles(paths: Array[String]): mutable.LinkedHashSet[FileStatus] = {
       if (paths.length >= sqlContext.conf.parallelPartitionDiscoveryThreshold) {
         HadoopFsRelation.listLeafFilesInParallel(paths, hadoopConf, sqlContext.sparkContext)
       } else {
@@ -450,10 +450,11 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
 
         val (dirs, files) = statuses.partition(_.isDir)
 
+        // It uses [[LinkedHashSet]] since the order of files can affect the results. (SPARK-11500)
         if (dirs.isEmpty) {
-          files.toSet
+          mutable.LinkedHashSet(files: _*)
         } else {
-          files.toSet ++ listLeafFiles(dirs.map(_.getPath.toString))
+          mutable.LinkedHashSet(files: _*) ++ listLeafFiles(dirs.map(_.getPath.toString))
         }
       }
     }
@@ -464,7 +465,7 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
       leafFiles.clear()
       leafDirToChildrenFiles.clear()
 
-      leafFiles ++= files.map(f => f.getPath -> f).toMap
+      leafFiles ++= files.map(f => f.getPath -> f)
       leafDirToChildrenFiles ++= files.toArray.groupBy(_.getPath.getParent)
     }
   }
@@ -475,8 +476,8 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
     cache
   }
 
-  protected def cachedLeafStatuses(): Set[FileStatus] = {
-    fileStatusCache.leafFiles.values.toSet
+  protected def cachedLeafStatuses(): mutable.LinkedHashSet[FileStatus] = {
+    mutable.LinkedHashSet(fileStatusCache.leafFiles.values.toArray: _*)
   }
 
   final private[sql] def partitionSpec: PartitionSpec = {
@@ -834,7 +835,7 @@ private[sql] object HadoopFsRelation extends Logging {
   def listLeafFilesInParallel(
       paths: Array[String],
       hadoopConf: Configuration,
-      sparkContext: SparkContext): Set[FileStatus] = {
+      sparkContext: SparkContext): mutable.LinkedHashSet[FileStatus] = {
     logInfo(s"Listing leaf files and directories in parallel under: ${paths.mkString(", ")}")
 
     val serializableConfiguration = new SerializableConfiguration(hadoopConf)
@@ -854,9 +855,10 @@ private[sql] object HadoopFsRelation extends Logging {
         status.getAccessTime)
     }.collect()
 
-    fakeStatuses.map { f =>
+    val hadoopFakeStatuses = fakeStatuses.map { f =>
       new FileStatus(
         f.length, f.isDir, f.blockReplication, f.blockSize, f.modificationTime, new Path(f.path))
-    }.toSet
+    }
+    mutable.LinkedHashSet(hadoopFakeStatuses: _*)
   }
 }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
index e2d754e80640..e866493ee6c9 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
@@ -23,7 +23,7 @@ import com.google.common.io.Files
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.deploy.SparkHadoopUtil
-import org.apache.spark.sql.{execution, AnalysisException, SaveMode}
+import org.apache.spark.sql._
 import org.apache.spark.sql.types._
 
 
@@ -155,4 +155,23 @@ class ParquetHadoopFsRelationSuite extends HadoopFsRelationTest {
       assert(physicalPlan.collect { case p: execution.Filter => p }.length === 1)
     }
   }
+
+  test("SPARK-11500: Not deterministic order of columns when using merging schemas.") {
+    import testImplicits._
+    withSQLConf(SQLConf.PARQUET_SCHEMA_MERGING_ENABLED.key -> "true") {
+      withTempPath { dir =>
+        val pathOne = s"${dir.getCanonicalPath}/part=1"
+        Seq(1, 1).zipWithIndex.toDF("a", "b").write.parquet(pathOne)
+        val pathTwo = s"${dir.getCanonicalPath}/part=2"
+        Seq(1, 1).zipWithIndex.toDF("c", "b").write.parquet(pathTwo)
+        val pathThree = s"${dir.getCanonicalPath}/part=3"
+        Seq(1, 1).zipWithIndex.toDF("d", "b").write.parquet(pathThree)
+
+        // The schema consists of the leading columns of the first part-file
+        // in the lexicographic order.
+        assert(sqlContext.read.parquet(dir.getCanonicalPath).schema.map(_.name)
+          === Seq("a", "b", "c", "d", "part"))
+      }
+    }
+  }
 }

From 1510c527b4f5ee0953ae42313ef9e16d2f5864c4 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 11 Nov 2015 09:33:07 -0800
Subject: [PATCH 625/896] [SPARK-10371][SQL][FOLLOW-UP] fix code style

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9627 from cloud-fan/follow.
---
 .../expressions/EquivalentExpressions.scala   | 22 +++++++++----------
 .../sql/catalyst/expressions/Expression.scala | 21 +++++++++---------
 .../expressions/codegen/CodeGenerator.scala   | 20 ++++++++---------
 3 files changed, 30 insertions(+), 33 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
index e7380d21f98a..f83df494ba8a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
@@ -29,29 +29,27 @@ class EquivalentExpressions {
    * Wrapper around an Expression that provides semantic equality.
    */
   case class Expr(e: Expression) {
-    val hash = e.semanticHash()
     override def equals(o: Any): Boolean = o match {
       case other: Expr => e.semanticEquals(other.e)
       case _ => false
     }
-    override def hashCode: Int = hash
+    override val hashCode: Int = e.semanticHash()
   }
 
   // For each expression, the set of equivalent expressions.
-  private val equivalenceMap: mutable.HashMap[Expr, mutable.MutableList[Expression]] =
-      new mutable.HashMap[Expr, mutable.MutableList[Expression]]
+  private val equivalenceMap = mutable.HashMap.empty[Expr, mutable.MutableList[Expression]]
 
   /**
    * Adds each expression to this data structure, grouping them with existing equivalent
    * expressions. Non-recursive.
-   * Returns if there was already a matching expression.
+   * Returns true if there was already a matching expression.
    */
   def addExpr(expr: Expression): Boolean = {
     if (expr.deterministic) {
       val e: Expr = Expr(expr)
       val f = equivalenceMap.get(e)
       if (f.isDefined) {
-        f.get.+= (expr)
+        f.get += expr
         true
       } else {
         equivalenceMap.put(e, mutable.MutableList(expr))
@@ -63,19 +61,19 @@ class EquivalentExpressions {
   }
 
   /**
-   * Adds the expression to this datastructure recursively. Stops if a matching expression
+   * Adds the expression to this data structure recursively. Stops if a matching expression
    * is found. That is, if `expr` has already been added, its children are not added.
    * If ignoreLeaf is true, leaf nodes are ignored.
    */
   def addExprTree(root: Expression, ignoreLeaf: Boolean = true): Unit = {
     val skip = root.isInstanceOf[LeafExpression] && ignoreLeaf
-    if (!skip && root.deterministic && !addExpr(root)) {
-     root.children.foreach(addExprTree(_, ignoreLeaf))
+    if (!skip && !addExpr(root)) {
+      root.children.foreach(addExprTree(_, ignoreLeaf))
     }
   }
 
   /**
-   * Returns all fo the expression trees that are equivalent to `e`. Returns
+   * Returns all of the expression trees that are equivalent to `e`. Returns
    * an empty collection if there are none.
    */
   def getEquivalentExprs(e: Expression): Seq[Expression] = {
@@ -90,8 +88,8 @@ class EquivalentExpressions {
   }
 
   /**
-   * Returns the state of the datastructure as a string. If all is false, skips sets of equivalent
-   * expressions with cardinality 1.
+   * Returns the state of the data structure as a string. If `all` is false, skips sets of
+   * equivalent expressions with cardinality 1.
    */
   def debugString(all: Boolean = false): String = {
     val sb: mutable.StringBuilder = new StringBuilder()
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
index 7d5741eefcc7..540ed3500616 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
@@ -92,17 +92,16 @@ abstract class Expression extends TreeNode[Expression] {
    * @return [[GeneratedExpressionCode]]
    */
   def gen(ctx: CodeGenContext): GeneratedExpressionCode = {
-    val subExprState = ctx.subExprEliminationExprs.get(this)
-    if (subExprState.isDefined) {
+    ctx.subExprEliminationExprs.get(this).map { subExprState =>
       // This expression is repeated meaning the code to evaluated has already been added
       // as a function, `subExprState.fnName`. Just call that.
       val code =
         s"""
            |/* $this */
-           |${subExprState.get.fnName}(${ctx.INPUT_ROW});
-           |""".stripMargin.trim
-      GeneratedExpressionCode(code, subExprState.get.code.isNull, subExprState.get.code.value)
-    } else {
+           |${subExprState.fnName}(${ctx.INPUT_ROW});
+         """.stripMargin.trim
+      GeneratedExpressionCode(code, subExprState.code.isNull, subExprState.code.value)
+    }.getOrElse {
       val isNull = ctx.freshName("isNull")
       val primitive = ctx.freshName("primitive")
       val ve = GeneratedExpressionCode("", isNull, primitive)
@@ -157,7 +156,7 @@ abstract class Expression extends TreeNode[Expression] {
         case (i1, i2) => i1 == i2
       }
     }
-    // Non-determinstic expressions cannot be equal
+    // Non-deterministic expressions cannot be semantic equal
     if (!deterministic || !other.deterministic) return false
     val elements1 = this.productIterator.toSeq
     val elements2 = other.asInstanceOf[Product].productIterator.toSeq
@@ -174,11 +173,11 @@ abstract class Expression extends TreeNode[Expression] {
       var hash: Int = 17
       e.foreach(i => {
         val h: Int = i match {
-          case (e: Expression) => e.semanticHash()
-          case (Some(e: Expression)) => e.semanticHash()
-          case (t: Traversable[_]) => computeHash(t.toSeq)
+          case e: Expression => e.semanticHash()
+          case Some(e: Expression) => e.semanticHash()
+          case t: Traversable[_] => computeHash(t.toSeq)
           case null => 0
-          case (o) => o.hashCode()
+          case other => other.hashCode()
         }
         hash = hash * 37 + h
       })
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 60a3d6018496..5a4bba232b04 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -109,15 +109,15 @@ class CodeGenContext {
 
   // State used for subexpression elimination.
   case class SubExprEliminationState(
-    val isLoaded: String, code: GeneratedExpressionCode, val fnName: String)
+      isLoaded: String,
+      code: GeneratedExpressionCode,
+      fnName: String)
 
   // Foreach expression that is participating in subexpression elimination, the state to use.
-  val subExprEliminationExprs: mutable.HashMap[Expression, SubExprEliminationState] =
-    mutable.HashMap[Expression, SubExprEliminationState]()
+  val subExprEliminationExprs = mutable.HashMap.empty[Expression, SubExprEliminationState]
 
   // The collection of isLoaded variables that need to be reset on each row.
-  val subExprIsLoadedVariables: mutable.ArrayBuffer[String] =
-    mutable.ArrayBuffer.empty[String]
+  val subExprIsLoadedVariables = mutable.ArrayBuffer.empty[String]
 
   final val JAVA_BOOLEAN = "boolean"
   final val JAVA_BYTE = "byte"
@@ -361,7 +361,7 @@ class CodeGenContext {
       val expr = e.head
       val isLoaded = freshName("isLoaded")
       val isNull = freshName("isNull")
-      val primitive = freshName("primitive")
+      val value = freshName("value")
       val fnName = freshName("evalExpr")
 
       // Generate the code for this expression tree and wrap it in a function.
@@ -373,13 +373,13 @@ class CodeGenContext {
            |    ${code.code.trim}
            |    $isLoaded = true;
            |    $isNull = ${code.isNull};
-           |    $primitive = ${code.value};
+           |    $value = ${code.value};
            |  }
            |}
            """.stripMargin
       code.code = fn
       code.isNull = isNull
-      code.value = primitive
+      code.value = value
 
       addNewFunction(fnName, fn)
 
@@ -406,8 +406,8 @@ class CodeGenContext {
       // optimizations.
       addMutableState("boolean", isLoaded, s"$isLoaded = false;")
       addMutableState("boolean", isNull, s"$isNull = false;")
-      addMutableState(javaType(expr.dataType), primitive,
-        s"$primitive = ${defaultValue(expr.dataType)};")
+      addMutableState(javaType(expr.dataType), value,
+        s"$value = ${defaultValue(expr.dataType)};")
       subExprIsLoadedVariables += isLoaded
 
       val state = SubExprEliminationState(isLoaded, code, fnName)

From 27524a3a9ccee6fbe56149180ebfb3f74e0957e7 Mon Sep 17 00:00:00 2001
From: Yuming Wang <q79969786@gmail.com>
Date: Wed, 11 Nov 2015 09:43:26 -0800
Subject: [PATCH 626/896] [SPARK-11626][ML] ml.feature.Word2Vec.transform()
 function very slow

org.apache.spark.ml.feature.Word2Vec.transform() very slow. we should not read broadcast every sentence.

Author: Yuming Wang <q79969786@gmail.com>
Author: yuming.wang <q79969786@gmail.com>
Author: Xiangrui Meng <meng@databricks.com>

Closes #9592 from 979969786/master.
---
 .../apache/spark/ml/feature/Word2Vec.scala    | 34 +++++++++----------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
index 9edab3af913c..5c64cb09d594 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
@@ -17,18 +17,16 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.SparkContext
+import org.apache.spark.annotation.Experimental
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
 import org.apache.spark.mllib.feature
-import org.apache.spark.mllib.linalg.{VectorUDT, Vector, Vectors}
-import org.apache.spark.mllib.linalg.BLAS._
-import org.apache.spark.sql.DataFrame
+import org.apache.spark.mllib.linalg.{BLAS, Vector, VectorUDT, Vectors}
+import org.apache.spark.sql.{DataFrame, SQLContext}
 import org.apache.spark.sql.functions._
-import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.types._
 
 /**
@@ -148,10 +146,9 @@ final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel]
 @Experimental
 class Word2VecModel private[ml] (
     override val uid: String,
-    wordVectors: feature.Word2VecModel)
+    @transient wordVectors: feature.Word2VecModel)
   extends Model[Word2VecModel] with Word2VecBase {
 
-
   /**
    * Returns a dataframe with two fields, "word" and "vector", with "word" being a String and
    * and the vector the DenseVector that it is mapped to.
@@ -197,22 +194,23 @@ class Word2VecModel private[ml] (
    */
   override def transform(dataset: DataFrame): DataFrame = {
     transformSchema(dataset.schema, logging = true)
-    val bWordVectors = dataset.sqlContext.sparkContext.broadcast(wordVectors)
+    val vectors = wordVectors.getVectors
+      .mapValues(vv => Vectors.dense(vv.map(_.toDouble)))
+      .map(identity) // mapValues doesn't return a serializable map (SI-7005)
+    val bVectors = dataset.sqlContext.sparkContext.broadcast(vectors)
+    val d = $(vectorSize)
     val word2Vec = udf { sentence: Seq[String] =>
       if (sentence.size == 0) {
-        Vectors.sparse($(vectorSize), Array.empty[Int], Array.empty[Double])
+        Vectors.sparse(d, Array.empty[Int], Array.empty[Double])
       } else {
-        val cum = Vectors.zeros($(vectorSize))
-        val model = bWordVectors.value.getVectors
-        for (word <- sentence) {
-          if (model.contains(word)) {
-            axpy(1.0, bWordVectors.value.transform(word), cum)
-          } else {
-            // pass words which not belong to model
+        val sum = Vectors.zeros(d)
+        sentence.foreach { word =>
+          bVectors.value.get(word).foreach { v =>
+            BLAS.axpy(1.0, v, sum)
           }
         }
-        scal(1.0 / sentence.size, cum)
-        cum
+        BLAS.scal(1.0 / sentence.size, sum)
+        sum
       }
     }
     dataset.withColumn($(outputCol), word2Vec(col($(inputCol))))

From 95daff6459fc749949c2d71a0b7ab1c5be854f70 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 11 Nov 2015 10:17:54 -0800
Subject: [PATCH 627/896] [SPARK-11646] WholeTextFileRDD should return Text
 rather than String

If it returns Text, we can reuse this in Spark SQL to provide a WholeTextFile data source and directly convert the Text into UTF8String without extra string decoding and encoding.

Author: Reynold Xin <rxin@databricks.com>

Closes #9622 from rxin/SPARK-11646.
---
 .../scala/org/apache/spark/SparkContext.scala |  6 +-
 .../input/WholeTextFileInputFormat.scala      |  6 +-
 .../input/WholeTextFileRecordReader.scala     | 12 ++--
 .../org/apache/spark/rdd/NewHadoopRDD.scala   | 33 +----------
 .../apache/spark/rdd/WholeTextFileRDD.scala   | 56 +++++++++++++++++++
 5 files changed, 69 insertions(+), 44 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rdd/WholeTextFileRDD.scala

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 67270c38fa1b..43a241686fd7 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -863,10 +863,10 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     new WholeTextFileRDD(
       this,
       classOf[WholeTextFileInputFormat],
-      classOf[String],
-      classOf[String],
+      classOf[Text],
+      classOf[Text],
       updateConf,
-      minPartitions).setName(path)
+      minPartitions).setName(path).map(record => (record._1.toString, record._2.toString))
   }
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/input/WholeTextFileInputFormat.scala b/core/src/main/scala/org/apache/spark/input/WholeTextFileInputFormat.scala
index 1ba34a11414a..413408723b54 100644
--- a/core/src/main/scala/org/apache/spark/input/WholeTextFileInputFormat.scala
+++ b/core/src/main/scala/org/apache/spark/input/WholeTextFileInputFormat.scala
@@ -20,6 +20,7 @@ package org.apache.spark.input
 import scala.collection.JavaConverters._
 
 import org.apache.hadoop.fs.Path
+import org.apache.hadoop.io.Text
 import org.apache.hadoop.mapreduce.InputSplit
 import org.apache.hadoop.mapreduce.JobContext
 import org.apache.hadoop.mapreduce.lib.input.CombineFileInputFormat
@@ -33,14 +34,13 @@ import org.apache.hadoop.mapreduce.TaskAttemptContext
  */
 
 private[spark] class WholeTextFileInputFormat
-  extends CombineFileInputFormat[String, String] with Configurable {
+  extends CombineFileInputFormat[Text, Text] with Configurable {
 
   override protected def isSplitable(context: JobContext, file: Path): Boolean = false
 
   override def createRecordReader(
       split: InputSplit,
-      context: TaskAttemptContext): RecordReader[String, String] = {
-
+      context: TaskAttemptContext): RecordReader[Text, Text] = {
     val reader =
       new ConfigurableCombineFileRecordReader(split, context, classOf[WholeTextFileRecordReader])
     reader.setConf(getConf)
diff --git a/core/src/main/scala/org/apache/spark/input/WholeTextFileRecordReader.scala b/core/src/main/scala/org/apache/spark/input/WholeTextFileRecordReader.scala
index 31bde8a78f3c..b56b2aa88a41 100644
--- a/core/src/main/scala/org/apache/spark/input/WholeTextFileRecordReader.scala
+++ b/core/src/main/scala/org/apache/spark/input/WholeTextFileRecordReader.scala
@@ -49,7 +49,7 @@ private[spark] class WholeTextFileRecordReader(
     split: CombineFileSplit,
     context: TaskAttemptContext,
     index: Integer)
-  extends RecordReader[String, String] with Configurable {
+  extends RecordReader[Text, Text] with Configurable {
 
   private[this] val path = split.getPath(index)
   private[this] val fs = path.getFileSystem(
@@ -58,8 +58,8 @@ private[spark] class WholeTextFileRecordReader(
   // True means the current file has been processed, then skip it.
   private[this] var processed = false
 
-  private[this] val key = path.toString
-  private[this] var value: String = null
+  private[this] val key: Text = new Text(path.toString)
+  private[this] var value: Text = null
 
   override def initialize(split: InputSplit, context: TaskAttemptContext): Unit = {}
 
@@ -67,9 +67,9 @@ private[spark] class WholeTextFileRecordReader(
 
   override def getProgress: Float = if (processed) 1.0f else 0.0f
 
-  override def getCurrentKey: String = key
+  override def getCurrentKey: Text = key
 
-  override def getCurrentValue: String = value
+  override def getCurrentValue: Text = value
 
   override def nextKeyValue(): Boolean = {
     if (!processed) {
@@ -83,7 +83,7 @@ private[spark] class WholeTextFileRecordReader(
         ByteStreams.toByteArray(fileIn)
       }
 
-      value = new Text(innerBuffer).toString
+      value = new Text(innerBuffer)
       Closeables.close(fileIn, false)
       processed = true
       true
diff --git a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
index 9c4b70844bdb..d1960990da0f 100644
--- a/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/NewHadoopRDD.scala
@@ -28,12 +28,11 @@ import org.apache.hadoop.mapreduce._
 import org.apache.hadoop.mapreduce.lib.input.{CombineFileSplit, FileSplit}
 
 import org.apache.spark.annotation.DeveloperApi
-import org.apache.spark.input.WholeTextFileInputFormat
 import org.apache.spark._
 import org.apache.spark.executor.DataReadMethod
 import org.apache.spark.mapreduce.SparkHadoopMapReduceUtil
 import org.apache.spark.rdd.NewHadoopRDD.NewHadoopMapPartitionsWithSplitRDD
-import org.apache.spark.util.{SerializableConfiguration, ShutdownHookManager, Utils}
+import org.apache.spark.util.{SerializableConfiguration, ShutdownHookManager}
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.storage.StorageLevel
 
@@ -59,7 +58,6 @@ private[spark] class NewHadoopPartition(
  * @param inputFormatClass Storage format of the data to be read.
  * @param keyClass Class of the key associated with the inputFormatClass.
  * @param valueClass Class of the value associated with the inputFormatClass.
- * @param conf The Hadoop configuration.
  */
 @DeveloperApi
 class NewHadoopRDD[K, V](
@@ -282,32 +280,3 @@ private[spark] object NewHadoopRDD {
     }
   }
 }
-
-private[spark] class WholeTextFileRDD(
-    sc : SparkContext,
-    inputFormatClass: Class[_ <: WholeTextFileInputFormat],
-    keyClass: Class[String],
-    valueClass: Class[String],
-    conf: Configuration,
-    minPartitions: Int)
-  extends NewHadoopRDD[String, String](sc, inputFormatClass, keyClass, valueClass, conf) {
-
-  override def getPartitions: Array[Partition] = {
-    val inputFormat = inputFormatClass.newInstance
-    val conf = getConf
-    inputFormat match {
-      case configurable: Configurable =>
-        configurable.setConf(conf)
-      case _ =>
-    }
-    val jobContext = newJobContext(conf, jobId)
-    inputFormat.setMinPartitions(jobContext, minPartitions)
-    val rawSplits = inputFormat.getSplits(jobContext).toArray
-    val result = new Array[Partition](rawSplits.size)
-    for (i <- 0 until rawSplits.size) {
-      result(i) = new NewHadoopPartition(id, i, rawSplits(i).asInstanceOf[InputSplit with Writable])
-    }
-    result
-  }
-}
-
diff --git a/core/src/main/scala/org/apache/spark/rdd/WholeTextFileRDD.scala b/core/src/main/scala/org/apache/spark/rdd/WholeTextFileRDD.scala
new file mode 100644
index 000000000000..e3f14fe7ef0f
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rdd/WholeTextFileRDD.scala
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rdd
+
+import org.apache.hadoop.conf.{Configurable, Configuration}
+import org.apache.hadoop.io.{Text, Writable}
+import org.apache.hadoop.mapreduce.InputSplit
+
+import org.apache.spark.{Partition, SparkContext}
+import org.apache.spark.input.WholeTextFileInputFormat
+
+/**
+ * An RDD that reads a bunch of text files in, and each text file becomes one record.
+ */
+private[spark] class WholeTextFileRDD(
+    sc : SparkContext,
+    inputFormatClass: Class[_ <: WholeTextFileInputFormat],
+    keyClass: Class[Text],
+    valueClass: Class[Text],
+    conf: Configuration,
+    minPartitions: Int)
+  extends NewHadoopRDD[Text, Text](sc, inputFormatClass, keyClass, valueClass, conf) {
+
+  override def getPartitions: Array[Partition] = {
+    val inputFormat = inputFormatClass.newInstance
+    val conf = getConf
+    inputFormat match {
+      case configurable: Configurable =>
+        configurable.setConf(conf)
+      case _ =>
+    }
+    val jobContext = newJobContext(conf, jobId)
+    inputFormat.setMinPartitions(jobContext, minPartitions)
+    val rawSplits = inputFormat.getSplits(jobContext).toArray
+    val result = new Array[Partition](rawSplits.size)
+    for (i <- 0 until rawSplits.size) {
+      result(i) = new NewHadoopPartition(id, i, rawSplits(i).asInstanceOf[InputSplit with Writable])
+    }
+    result
+  }
+}

From c964fc101585171aee76996981fe2c9fdafc614e Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 11 Nov 2015 10:19:09 -0800
Subject: [PATCH 628/896] [SQL][MINOR] rename present to finish in Aggregator

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9617 from cloud-fan/tmp.
---
 .../sql/execution/aggregate/TypedAggregateExpression.scala  | 2 +-
 .../scala/org/apache/spark/sql/expressions/Aggregator.scala | 2 +-
 .../scala/org/apache/spark/sql/DatasetAggregatorSuite.scala | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index 0e5bc1f9abf2..b5a87c56e681 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -136,7 +136,7 @@ case class TypedAggregateExpression(
 
   override def eval(buffer: InternalRow): Any = {
     val b = boundB.shift(mutableAggBufferOffset).fromRow(buffer)
-    val result = cEncoder.toRow(aggregator.present(b))
+    val result = cEncoder.toRow(aggregator.finish(b))
     dataType match {
       case _: StructType => result
       case _ => result.get(0, dataType)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 3c1c457e06d5..2aa5a7d54031 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -65,7 +65,7 @@ abstract class Aggregator[-A, B, C] {
   /**
    * Transform the output of the reduction.
    */
-  def present(reduction: B): C
+  def finish(reduction: B): C
 
   /**
    * Returns this `Aggregator` as a [[TypedColumn]] that can be used in [[Dataset]] or [[DataFrame]]
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 206095a51976..002d5c18f0a2 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -36,7 +36,7 @@ class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializ
 
   override def merge(b1: N, b2: N): N = numeric.plus(b1, b2)
 
-  override def present(reduction: N): N = reduction
+  override def finish(reduction: N): N = reduction
 }
 
 object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] with Serializable {
@@ -50,7 +50,7 @@ object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] with
     (b1._1 + b2._1, b1._2 + b2._2)
   }
 
-  override def present(countAndSum: (Long, Long)): Double = countAndSum._2 / countAndSum._1
+  override def finish(countAndSum: (Long, Long)): Double = countAndSum._2 / countAndSum._1
 }
 
 object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, Long)]
@@ -66,7 +66,7 @@ object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, L
     (b1._1 + b2._1, b1._2 + b2._2)
   }
 
-  override def present(reduction: (Long, Long)): (Long, Long) = reduction
+  override def finish(reduction: (Long, Long)): (Long, Long) = reduction
 }
 
 class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {

From 9c57bc0efce0ac37d8319666f5a8d3e8dce7651c Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 11 Nov 2015 10:21:53 -0800
Subject: [PATCH 629/896] [SPARK-11656][SQL] support typed aggregate in project
 list

insert `aEncoder` like we do in `agg`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9630 from cloud-fan/select.
---
 .../scala/org/apache/spark/sql/Dataset.scala  | 20 +++++++++++++++----
 .../spark/sql/DatasetAggregatorSuite.scala    | 11 ++++++++++
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index a7e5ab19bf84..87dae6b33159 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -21,14 +21,15 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
 import org.apache.spark.api.java.function._
 
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.{Queryable, QueryExecution}
+import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.types.StructType
 
 /**
@@ -359,7 +360,7 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1: Encoder](c1: TypedColumn[T, U1]): Dataset[U1] = {
-    new Dataset[U1](sqlContext, Project(Alias(c1.expr, "_1")() :: Nil, logicalPlan))
+    new Dataset[U1](sqlContext, Project(Alias(withEncoder(c1).expr, "_1")() :: Nil, logicalPlan))
   }
 
   /**
@@ -368,11 +369,12 @@ class Dataset[T] private[sql](
    * that cast appropriately for the user facing interface.
    */
   protected def selectUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
-    val aliases = columns.zipWithIndex.map { case (c, i) => Alias(c.expr, s"_${i + 1}")() }
+    val withEncoders = columns.map(withEncoder)
+    val aliases = withEncoders.zipWithIndex.map { case (c, i) => Alias(c.expr, s"_${i + 1}")() }
     val unresolvedPlan = Project(aliases, logicalPlan)
     val execution = new QueryExecution(sqlContext, unresolvedPlan)
     // Rebind the encoders to the nested schema that will be produced by the select.
-    val encoders = columns.map(_.encoder.asInstanceOf[ExpressionEncoder[_]]).zip(aliases).map {
+    val encoders = withEncoders.map(_.encoder.asInstanceOf[ExpressionEncoder[_]]).zip(aliases).map {
       case (e: ExpressionEncoder[_], a) if !e.flat =>
         e.nested(a.toAttribute).resolve(execution.analyzed.output)
       case (e, a) =>
@@ -381,6 +383,16 @@ class Dataset[T] private[sql](
     new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
   }
 
+  private def withEncoder(c: TypedColumn[_, _]): TypedColumn[_, _] = {
+    val e = c.expr transform {
+      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
+        ta.copy(
+          aEncoder = Some(encoder.asInstanceOf[ExpressionEncoder[Any]]),
+          children = queryExecution.analyzed.output)
+    }
+    new TypedColumn(e, c.encoder)
+  }
+
   /**
    * Returns a new [[Dataset]] by computing the given [[Column]] expressions for each element.
    * @since 1.6.0
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 002d5c18f0a2..d4f0ab76cfbf 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -114,4 +114,15 @@ class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
         ComplexResultAgg.toColumn),
       ("a", 2.0, (2L, 4L)), ("b", 3.0, (1L, 3L)))
   }
+
+  test("typed aggregation: in project list") {
+    val ds = Seq(1, 3, 2, 5).toDS()
+
+    checkAnswer(
+      ds.select(sum((i: Int) => i)),
+      11)
+    checkAnswer(
+      ds.select(sum((i: Int) => i), sum((i: Int) => i * 2)),
+      11 -> 22)
+  }
 }

From ec2b807212e568c9e98cd80746bcb61e02c7a98e Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 11 Nov 2015 10:52:23 -0800
Subject: [PATCH 630/896] [SPARK-11564][SQL][FOLLOW-UP] clean up java tuple
 encoder

We need to support custom classes like java beans and combine them into tuple, and it's very hard to do it with the  TypeTag-based approach.
We should keep only the compose-based way to create tuple encoder.

This PR also move `Encoder` to `org.apache.spark.sql`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9567 from cloud-fan/java.
---
 .../sql/{catalyst/encoders => }/Encoder.scala | 65 ++--------------
 .../catalyst/encoders/ExpressionEncoder.scala | 10 +--
 .../spark/sql/catalyst/encoders/package.scala |  3 +-
 .../plans/logical/basicOperators.scala        |  1 +
 .../scala/org/apache/spark/sql/Column.scala   |  2 +-
 .../org/apache/spark/sql/DataFrame.scala      |  2 -
 .../org/apache/spark/sql/GroupedDataset.scala |  2 +-
 .../org/apache/spark/sql/SQLContext.scala     |  2 +-
 .../aggregate/TypedAggregateExpression.scala  |  3 +-
 .../spark/sql/expressions/Aggregator.scala    |  3 +-
 .../org/apache/spark/sql/functions.scala      |  2 +-
 .../apache/spark/sql/JavaDatasetSuite.java    | 78 ++++++++++---------
 .../spark/sql/DatasetAggregatorSuite.scala    |  4 +-
 .../org/apache/spark/sql/QueryTest.scala      |  1 -
 14 files changed, 65 insertions(+), 113 deletions(-)
 rename sql/catalyst/src/main/scala/org/apache/spark/sql/{catalyst/encoders => }/Encoder.scala (71%)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
similarity index 71%
rename from sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
rename to sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 6569b900fed9..1ff7340557e6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -15,13 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.catalyst.encoders
+package org.apache.spark.sql
 
-import scala.reflect.ClassTag
-
-import org.apache.spark.util.Utils
-import org.apache.spark.sql.types.{ObjectType, StructField, StructType}
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.types.{ObjectType, StructField, StructType}
+import org.apache.spark.util.Utils
+
+import scala.reflect.ClassTag
 
 /**
  * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
@@ -38,9 +39,7 @@ trait Encoder[T] extends Serializable {
   def clsTag: ClassTag[T]
 }
 
-object Encoder {
-  import scala.reflect.runtime.universe._
-
+object Encoders {
   def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
   def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
   def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
@@ -129,54 +128,4 @@ object Encoder {
       constructExpression,
       ClassTag.apply(cls))
   }
-
-  def typeTagOfTuple2[T1 : TypeTag, T2 : TypeTag]: TypeTag[(T1, T2)] = typeTag[(T1, T2)]
-
-  private def getTypeTag[T](c: Class[T]): TypeTag[T] = {
-    import scala.reflect.api
-
-    // val mirror = runtimeMirror(c.getClassLoader)
-    val mirror = rootMirror
-    val sym = mirror.staticClass(c.getName)
-    val tpe = sym.selfType
-    TypeTag(mirror, new api.TypeCreator {
-      def apply[U <: api.Universe with Singleton](m: api.Mirror[U]) =
-        if (m eq mirror) tpe.asInstanceOf[U # Type]
-        else throw new IllegalArgumentException(
-          s"Type tag defined in $mirror cannot be migrated to other mirrors.")
-    })
-  }
-
-  def forTuple[T1, T2](c1: Class[T1], c2: Class[T2]): Encoder[(T1, T2)] = {
-    implicit val typeTag1 = getTypeTag(c1)
-    implicit val typeTag2 = getTypeTag(c2)
-    ExpressionEncoder[(T1, T2)]()
-  }
-
-  def forTuple[T1, T2, T3](c1: Class[T1], c2: Class[T2], c3: Class[T3]): Encoder[(T1, T2, T3)] = {
-    implicit val typeTag1 = getTypeTag(c1)
-    implicit val typeTag2 = getTypeTag(c2)
-    implicit val typeTag3 = getTypeTag(c3)
-    ExpressionEncoder[(T1, T2, T3)]()
-  }
-
-  def forTuple[T1, T2, T3, T4](
-      c1: Class[T1], c2: Class[T2], c3: Class[T3], c4: Class[T4]): Encoder[(T1, T2, T3, T4)] = {
-    implicit val typeTag1 = getTypeTag(c1)
-    implicit val typeTag2 = getTypeTag(c2)
-    implicit val typeTag3 = getTypeTag(c3)
-    implicit val typeTag4 = getTypeTag(c4)
-    ExpressionEncoder[(T1, T2, T3, T4)]()
-  }
-
-  def forTuple[T1, T2, T3, T4, T5](
-      c1: Class[T1], c2: Class[T2], c3: Class[T3], c4: Class[T4], c5: Class[T5])
-    : Encoder[(T1, T2, T3, T4, T5)] = {
-    implicit val typeTag1 = getTypeTag(c1)
-    implicit val typeTag2 = getTypeTag(c2)
-    implicit val typeTag3 = getTypeTag(c3)
-    implicit val typeTag4 = getTypeTag(c4)
-    implicit val typeTag5 = getTypeTag(c5)
-    ExpressionEncoder[(T1, T2, T3, T4, T5)]()
-  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 005c0627f56b..294afde5347e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -17,18 +17,18 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-import org.apache.spark.sql.catalyst.analysis.{SimpleAnalyzer, UnresolvedExtractValue, UnresolvedAttribute}
-import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
-import org.apache.spark.util.Utils
-
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.{typeTag, TypeTag}
 
+import org.apache.spark.util.Utils
+import org.apache.spark.sql.Encoder
+import org.apache.spark.sql.catalyst.analysis.{SimpleAnalyzer, UnresolvedExtractValue, UnresolvedAttribute}
+import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.ScalaReflection
-import org.apache.spark.sql.types.{StructField, DataType, ObjectType, StructType}
+import org.apache.spark.sql.types.{StructField, ObjectType, StructType}
 
 /**
  * A factory for constructing encoders that convert objects and primitves to and from the
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
index d4642a500672..2c35adca9c92 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
@@ -17,10 +17,11 @@
 
 package org.apache.spark.sql.catalyst
 
+import org.apache.spark.sql.Encoder
+
 package object encoders {
   private[sql] def encoderFor[A : Encoder]: ExpressionEncoder[A] = implicitly[Encoder[A]] match {
     case e: ExpressionEncoder[A] => e
     case _ => sys.error(s"Only expression encoders are supported today")
   }
 }
-
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 764f8aaebddf..597f03e75270 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.catalyst.plans.logical
 
+import org.apache.spark.sql.Encoder
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index d26b6c357920..f0f275e91f1a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -23,7 +23,7 @@ import org.apache.spark.annotation.Experimental
 import org.apache.spark.Logging
 import org.apache.spark.sql.functions.lit
 import org.apache.spark.sql.catalyst.analysis._
-import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.encoders.encoderFor
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 691b476fff8d..a492099b9392 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -23,7 +23,6 @@ import java.util.Properties
 import scala.language.implicitConversions
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.TypeTag
-import scala.util.control.NonFatal
 
 import com.fasterxml.jackson.core.JsonFactory
 import org.apache.commons.lang3.StringUtils
@@ -35,7 +34,6 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.analysis._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
-import org.apache.spark.sql.catalyst.encoders.Encoder
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index db6149922928..61e2a9545069 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -24,7 +24,7 @@ import scala.collection.JavaConverters._
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function.{Function2 => JFunction2, Function3 => JFunction3, _}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttribute}
-import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
 import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, Alias, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 1cf1e30f967c..cd1fdc4edb39 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -33,7 +33,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.scheduler.{SparkListener, SparkListenerApplicationEnd}
 import org.apache.spark.sql.SQLConf.SQLConfEntry
 import org.apache.spark.sql.catalyst.analysis._
-import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.encoders.encoderFor
 import org.apache.spark.sql.catalyst.errors.DialectException
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.optimizer.{DefaultOptimizer, Optimizer}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index b5a87c56e681..dfcbac8687b3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -20,9 +20,10 @@ package org.apache.spark.sql.execution.aggregate
 import scala.language.existentials
 
 import org.apache.spark.Logging
+import org.apache.spark.sql.Encoder
 import org.apache.spark.sql.expressions.Aggregator
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.catalyst.encoders.encoderFor
 import org.apache.spark.sql.catalyst.expressions.aggregate.ImperativeAggregate
 import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 2aa5a7d54031..360c9a5bc15e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -17,7 +17,8 @@
 
 package org.apache.spark.sql.expressions
 
-import org.apache.spark.sql.catalyst.encoders.{encoderFor, Encoder}
+import org.apache.spark.sql.Encoder
+import org.apache.spark.sql.catalyst.encoders.encoderFor
 import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression, Complete}
 import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index a59d738010f7..ab49ed4b5d4e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -26,7 +26,7 @@ import scala.util.Try
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.{SqlParser, ScalaReflection}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, Star}
-import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, Encoder}
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.BroadcastHint
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 2da63d1b9670..33d8388f615a 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -30,8 +30,8 @@
 import org.apache.spark.SparkContext;
 import org.apache.spark.api.java.function.*;
 import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.sql.catalyst.encoders.Encoder;
-import org.apache.spark.sql.catalyst.encoders.Encoder$;
+import org.apache.spark.sql.Encoder;
+import org.apache.spark.sql.Encoders;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.GroupedDataset;
 import org.apache.spark.sql.test.TestSQLContext;
@@ -41,7 +41,6 @@
 public class JavaDatasetSuite implements Serializable {
   private transient JavaSparkContext jsc;
   private transient TestSQLContext context;
-  private transient Encoder$ e = Encoder$.MODULE$;
 
   @Before
   public void setUp() {
@@ -66,7 +65,7 @@ private <T1, T2> Tuple2<T1, T2> tuple2(T1 t1, T2 t2) {
   @Test
   public void testCollect() {
     List<String> data = Arrays.asList("hello", "world");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
     List<String> collected = ds.collectAsList();
     Assert.assertEquals(Arrays.asList("hello", "world"), collected);
   }
@@ -74,7 +73,7 @@ public void testCollect() {
   @Test
   public void testTake() {
     List<String> data = Arrays.asList("hello", "world");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
     List<String> collected = ds.takeAsList(1);
     Assert.assertEquals(Arrays.asList("hello"), collected);
   }
@@ -82,7 +81,7 @@ public void testTake() {
   @Test
   public void testCommonOperation() {
     List<String> data = Arrays.asList("hello", "world");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
     Assert.assertEquals("hello", ds.first());
 
     Dataset<String> filtered = ds.filter(new FilterFunction<String>() {
@@ -99,7 +98,7 @@ public boolean call(String v) throws Exception {
       public Integer call(String v) throws Exception {
         return v.length();
       }
-    }, e.INT());
+    }, Encoders.INT());
     Assert.assertEquals(Arrays.asList(5, 5), mapped.collectAsList());
 
     Dataset<String> parMapped = ds.mapPartitions(new MapPartitionsFunction<String, String>() {
@@ -111,7 +110,7 @@ public Iterable<String> call(Iterator<String> it) throws Exception {
         }
         return ls;
       }
-    }, e.STRING());
+    }, Encoders.STRING());
     Assert.assertEquals(Arrays.asList("HELLO", "WORLD"), parMapped.collectAsList());
 
     Dataset<String> flatMapped = ds.flatMap(new FlatMapFunction<String, String>() {
@@ -123,7 +122,7 @@ public Iterable<String> call(String s) throws Exception {
         }
         return ls;
       }
-    }, e.STRING());
+    }, Encoders.STRING());
     Assert.assertEquals(
       Arrays.asList("h", "e", "l", "l", "o", "w", "o", "r", "l", "d"),
       flatMapped.collectAsList());
@@ -133,7 +132,7 @@ public Iterable<String> call(String s) throws Exception {
   public void testForeach() {
     final Accumulator<Integer> accum = jsc.accumulator(0);
     List<String> data = Arrays.asList("a", "b", "c");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
 
     ds.foreach(new ForeachFunction<String>() {
       @Override
@@ -147,7 +146,7 @@ public void call(String s) throws Exception {
   @Test
   public void testReduce() {
     List<Integer> data = Arrays.asList(1, 2, 3);
-    Dataset<Integer> ds = context.createDataset(data, e.INT());
+    Dataset<Integer> ds = context.createDataset(data, Encoders.INT());
 
     int reduced = ds.reduce(new ReduceFunction<Integer>() {
       @Override
@@ -161,13 +160,13 @@ public Integer call(Integer v1, Integer v2) throws Exception {
   @Test
   public void testGroupBy() {
     List<String> data = Arrays.asList("a", "foo", "bar");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
     GroupedDataset<Integer, String> grouped = ds.groupBy(new MapFunction<String, Integer>() {
       @Override
       public Integer call(String v) throws Exception {
         return v.length();
       }
-    }, e.INT());
+    }, Encoders.INT());
 
     Dataset<String> mapped = grouped.map(new MapGroupFunction<Integer, String, String>() {
       @Override
@@ -178,7 +177,7 @@ public String call(Integer key, Iterator<String> values) throws Exception {
         }
         return sb.toString();
       }
-    }, e.STRING());
+    }, Encoders.STRING());
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
 
@@ -193,27 +192,27 @@ public Iterable<String> call(Integer key, Iterator<String> values) throws Except
           return Collections.singletonList(sb.toString());
         }
       },
-      e.STRING());
+      Encoders.STRING());
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), flatMapped.collectAsList());
 
     List<Integer> data2 = Arrays.asList(2, 6, 10);
-    Dataset<Integer> ds2 = context.createDataset(data2, e.INT());
+    Dataset<Integer> ds2 = context.createDataset(data2, Encoders.INT());
     GroupedDataset<Integer, Integer> grouped2 = ds2.groupBy(new MapFunction<Integer, Integer>() {
       @Override
       public Integer call(Integer v) throws Exception {
         return v / 2;
       }
-    }, e.INT());
+    }, Encoders.INT());
 
     Dataset<String> cogrouped = grouped.cogroup(
       grouped2,
       new CoGroupFunction<Integer, String, Integer, String>() {
         @Override
         public Iterable<String> call(
-            Integer key,
-            Iterator<String> left,
-            Iterator<Integer> right) throws Exception {
+          Integer key,
+          Iterator<String> left,
+          Iterator<Integer> right) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
           while (left.hasNext()) {
             sb.append(left.next());
@@ -225,7 +224,7 @@ public Iterable<String> call(
           return Collections.singletonList(sb.toString());
         }
       },
-      e.STRING());
+      Encoders.STRING());
 
     Assert.assertEquals(Arrays.asList("1a#2", "3foobar#6", "5#10"), cogrouped.collectAsList());
   }
@@ -233,8 +232,9 @@ public Iterable<String> call(
   @Test
   public void testGroupByColumn() {
     List<String> data = Arrays.asList("a", "foo", "bar");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
-    GroupedDataset<Integer, String> grouped = ds.groupBy(length(col("value"))).asKey(e.INT());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
+    GroupedDataset<Integer, String> grouped =
+      ds.groupBy(length(col("value"))).asKey(Encoders.INT());
 
     Dataset<String> mapped = grouped.map(
       new MapGroupFunction<Integer, String, String>() {
@@ -247,7 +247,7 @@ public String call(Integer key, Iterator<String> data) throws Exception {
           return sb.toString();
         }
       },
-      e.STRING());
+      Encoders.STRING());
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
   }
@@ -255,11 +255,11 @@ public String call(Integer key, Iterator<String> data) throws Exception {
   @Test
   public void testSelect() {
     List<Integer> data = Arrays.asList(2, 6);
-    Dataset<Integer> ds = context.createDataset(data, e.INT());
+    Dataset<Integer> ds = context.createDataset(data, Encoders.INT());
 
     Dataset<Tuple2<Integer, String>> selected = ds.select(
       expr("value + 1"),
-      col("value").cast("string")).as(e.tuple(e.INT(), e.STRING()));
+      col("value").cast("string")).as(Encoders.tuple(Encoders.INT(), Encoders.STRING()));
 
     Assert.assertEquals(
       Arrays.asList(tuple2(3, "2"), tuple2(7, "6")),
@@ -269,14 +269,14 @@ public void testSelect() {
   @Test
   public void testSetOperation() {
     List<String> data = Arrays.asList("abc", "abc", "xyz");
-    Dataset<String> ds = context.createDataset(data, e.STRING());
+    Dataset<String> ds = context.createDataset(data, Encoders.STRING());
 
     Assert.assertEquals(
       Arrays.asList("abc", "xyz"),
       sort(ds.distinct().collectAsList().toArray(new String[0])));
 
     List<String> data2 = Arrays.asList("xyz", "foo", "foo");
-    Dataset<String> ds2 = context.createDataset(data2, e.STRING());
+    Dataset<String> ds2 = context.createDataset(data2, Encoders.STRING());
 
     Dataset<String> intersected = ds.intersect(ds2);
     Assert.assertEquals(Arrays.asList("xyz"), intersected.collectAsList());
@@ -298,9 +298,9 @@ private <T extends Comparable<T>> List<T> sort(T[] data) {
   @Test
   public void testJoin() {
     List<Integer> data = Arrays.asList(1, 2, 3);
-    Dataset<Integer> ds = context.createDataset(data, e.INT()).as("a");
+    Dataset<Integer> ds = context.createDataset(data, Encoders.INT()).as("a");
     List<Integer> data2 = Arrays.asList(2, 3, 4);
-    Dataset<Integer> ds2 = context.createDataset(data2, e.INT()).as("b");
+    Dataset<Integer> ds2 = context.createDataset(data2, Encoders.INT()).as("b");
 
     Dataset<Tuple2<Integer, Integer>> joined =
       ds.joinWith(ds2, col("a.value").equalTo(col("b.value")));
@@ -311,26 +311,28 @@ public void testJoin() {
 
   @Test
   public void testTupleEncoder() {
-    Encoder<Tuple2<Integer, String>> encoder2 = e.tuple(e.INT(), e.STRING());
+    Encoder<Tuple2<Integer, String>> encoder2 = Encoders.tuple(Encoders.INT(), Encoders.STRING());
     List<Tuple2<Integer, String>> data2 = Arrays.asList(tuple2(1, "a"), tuple2(2, "b"));
     Dataset<Tuple2<Integer, String>> ds2 = context.createDataset(data2, encoder2);
     Assert.assertEquals(data2, ds2.collectAsList());
 
-    Encoder<Tuple3<Integer, Long, String>> encoder3 = e.tuple(e.INT(), e.LONG(), e.STRING());
+    Encoder<Tuple3<Integer, Long, String>> encoder3 =
+      Encoders.tuple(Encoders.INT(), Encoders.LONG(), Encoders.STRING());
     List<Tuple3<Integer, Long, String>> data3 =
       Arrays.asList(new Tuple3<Integer, Long, String>(1, 2L, "a"));
     Dataset<Tuple3<Integer, Long, String>> ds3 = context.createDataset(data3, encoder3);
     Assert.assertEquals(data3, ds3.collectAsList());
 
     Encoder<Tuple4<Integer, String, Long, String>> encoder4 =
-      e.tuple(e.INT(), e.STRING(), e.LONG(), e.STRING());
+      Encoders.tuple(Encoders.INT(), Encoders.STRING(), Encoders.LONG(), Encoders.STRING());
     List<Tuple4<Integer, String, Long, String>> data4 =
       Arrays.asList(new Tuple4<Integer, String, Long, String>(1, "b", 2L, "a"));
     Dataset<Tuple4<Integer, String, Long, String>> ds4 = context.createDataset(data4, encoder4);
     Assert.assertEquals(data4, ds4.collectAsList());
 
     Encoder<Tuple5<Integer, String, Long, String, Boolean>> encoder5 =
-      e.tuple(e.INT(), e.STRING(), e.LONG(), e.STRING(), e.BOOLEAN());
+      Encoders.tuple(Encoders.INT(), Encoders.STRING(), Encoders.LONG(), Encoders.STRING(),
+        Encoders.BOOLEAN());
     List<Tuple5<Integer, String, Long, String, Boolean>> data5 =
       Arrays.asList(new Tuple5<Integer, String, Long, String, Boolean>(1, "b", 2L, "a", true));
     Dataset<Tuple5<Integer, String, Long, String, Boolean>> ds5 =
@@ -342,7 +344,7 @@ public void testTupleEncoder() {
   public void testNestedTupleEncoder() {
     // test ((int, string), string)
     Encoder<Tuple2<Tuple2<Integer, String>, String>> encoder =
-      e.tuple(e.tuple(e.INT(), e.STRING()), e.STRING());
+      Encoders.tuple(Encoders.tuple(Encoders.INT(), Encoders.STRING()), Encoders.STRING());
     List<Tuple2<Tuple2<Integer, String>, String>> data =
       Arrays.asList(tuple2(tuple2(1, "a"), "a"), tuple2(tuple2(2, "b"), "b"));
     Dataset<Tuple2<Tuple2<Integer, String>, String>> ds = context.createDataset(data, encoder);
@@ -350,7 +352,8 @@ public void testNestedTupleEncoder() {
 
     // test (int, (string, string, long))
     Encoder<Tuple2<Integer, Tuple3<String, String, Long>>> encoder2 =
-      e.tuple(e.INT(), e.tuple(e.STRING(), e.STRING(), e.LONG()));
+      Encoders.tuple(Encoders.INT(),
+        Encoders.tuple(Encoders.STRING(), Encoders.STRING(), Encoders.LONG()));
     List<Tuple2<Integer, Tuple3<String, String, Long>>> data2 =
       Arrays.asList(tuple2(1, new Tuple3<String, String, Long>("a", "b", 3L)));
     Dataset<Tuple2<Integer, Tuple3<String, String, Long>>> ds2 =
@@ -359,7 +362,8 @@ public void testNestedTupleEncoder() {
 
     // test (int, ((string, long), string))
     Encoder<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> encoder3 =
-      e.tuple(e.INT(), e.tuple(e.tuple(e.STRING(), e.LONG()), e.STRING()));
+      Encoders.tuple(Encoders.INT(),
+        Encoders.tuple(Encoders.tuple(Encoders.STRING(), Encoders.LONG()), Encoders.STRING()));
     List<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> data3 =
       Arrays.asList(tuple2(1, tuple2(tuple2("a", 2L), "b")));
     Dataset<Tuple2<Integer, Tuple2<Tuple2<String, Long>, String>>> ds3 =
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index d4f0ab76cfbf..378cd365276b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -17,13 +17,11 @@
 
 package org.apache.spark.sql
 
-import org.apache.spark.sql.catalyst.encoders.Encoder
-import org.apache.spark.sql.functions._
 
 import scala.language.postfixOps
 
 import org.apache.spark.sql.test.SharedSQLContext
-
+import org.apache.spark.sql.functions._
 import org.apache.spark.sql.expressions.Aggregator
 
 /** An `Aggregator` that adds up any numeric type returned by the given function. */
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index 3c174efe73ff..7a8b7ae5bf26 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -24,7 +24,6 @@ import scala.collection.JavaConverters._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.util._
 import org.apache.spark.sql.columnar.InMemoryRelation
-import org.apache.spark.sql.catalyst.encoders.Encoder
 
 abstract class QueryTest extends PlanTest {
 

From e71ba56586ba64da18f412bc0e0263777c46ac4a Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 11 Nov 2015 11:04:04 -0800
Subject: [PATCH 631/896] [SQL][MINOR] remove newLongEncoder in functions

it may shadows the one from implicits in some case.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9629 from cloud-fan/minor.
---
 .../src/main/scala/org/apache/spark/sql/functions.scala     | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index ab49ed4b5d4e..b6330e230afe 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -83,9 +83,6 @@ object functions extends LegacyFunctions {
     Column(func.toAggregateExpression(isDistinct))
   }
 
-  private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
-
-
   /**
    * Returns a [[Column]] based on the given column name.
    *
@@ -269,7 +266,8 @@ object functions extends LegacyFunctions {
    * @group agg_funcs
    * @since 1.3.0
    */
-  def count(columnName: String): TypedColumn[Any, Long] = count(Column(columnName)).as[Long]
+  def count(columnName: String): TypedColumn[Any, Long] =
+    count(Column(columnName)).as(ExpressionEncoder[Long](flat = true))
 
   /**
    * Aggregate function: returns the number of distinct items in a group.

From 529a1d3380c4c23fed068ad05a6376162c4b76d6 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 11 Nov 2015 11:16:39 -0800
Subject: [PATCH 632/896] [SPARK-6152] Use shaded ASM5 to support closure
 cleaning of Java 8 compiled classes

This patch modifies Spark's closure cleaner (and a few other places) to use ASM 5, which is necessary in order to support cleaning of closures that were compiled by Java 8.

In order to avoid ASM dependency conflicts, Spark excludes ASM from all of its dependencies and uses a shaded version of ASM 4 that comes from `reflectasm` (see [SPARK-782](https://issues.apache.org/jira/browse/SPARK-782) and #232). This patch updates Spark to use a shaded version of ASM 5.0.4 that was published by the Apache XBean project; the POM used to create the shaded artifact can be found at https://github.com/apache/geronimo-xbean/blob/xbean-4.4/xbean-asm5-shaded/pom.xml.

http://movingfulcrum.tumblr.com/post/80826553604/asm-framework-50-the-missing-migration-guide was a useful resource while upgrading the code to use the new ASM5 opcodes.

I also added a new regression tests in the `java8-tests` subproject; the existing tests were insufficient to catch this bug, which only affected Scala 2.11 user code which was compiled targeting Java 8.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9512 from JoshRosen/SPARK-6152.
---
 core/pom.xml                                  |  4 ++
 .../apache/spark/util/ClosureCleaner.scala    | 25 +++++-----
 docs/building-spark.md                        |  4 ++
 .../org/apache/spark/JDK8ScalaSuite.scala     | 27 ++++++++++
 graphx/pom.xml                                |  4 ++
 .../spark/graphx/util/BytecodeUtils.scala     | 16 +++---
 pom.xml                                       |  8 +++
 project/SparkBuild.scala                      | 26 +++++++++-
 repl/pom.xml                                  |  4 ++
 .../spark/repl/ExecutorClassLoader.scala      |  9 ++--
 sql/core/pom.xml                              |  5 ++
 .../execution/metric/SQLMetricsSuite.scala    | 50 ++++++++-----------
 12 files changed, 125 insertions(+), 57 deletions(-)
 create mode 100644 extras/java8-tests/src/test/scala/org/apache/spark/JDK8ScalaSuite.scala

diff --git a/core/pom.xml b/core/pom.xml
index 570a25cf325a..7e1205a076f2 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -51,6 +51,10 @@
       <groupId>com.twitter</groupId>
       <artifactId>chill-java</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.xbean</groupId>
+      <artifactId>xbean-asm5-shaded</artifactId>
+    </dependency>
     <dependency>
       <groupId>org.apache.hadoop</groupId>
       <artifactId>hadoop-client</artifactId>
diff --git a/core/src/main/scala/org/apache/spark/util/ClosureCleaner.scala b/core/src/main/scala/org/apache/spark/util/ClosureCleaner.scala
index 1b49dca9dc78..e27d2e6c94f7 100644
--- a/core/src/main/scala/org/apache/spark/util/ClosureCleaner.scala
+++ b/core/src/main/scala/org/apache/spark/util/ClosureCleaner.scala
@@ -21,8 +21,8 @@ import java.io.{ByteArrayInputStream, ByteArrayOutputStream}
 
 import scala.collection.mutable.{Map, Set}
 
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.{ClassReader, ClassVisitor, MethodVisitor, Type}
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.Opcodes._
+import org.apache.xbean.asm5.{ClassReader, ClassVisitor, MethodVisitor, Type}
+import org.apache.xbean.asm5.Opcodes._
 
 import org.apache.spark.{Logging, SparkEnv, SparkException}
 
@@ -325,11 +325,11 @@ private[spark] object ClosureCleaner extends Logging {
 private[spark] class ReturnStatementInClosureException
   extends SparkException("Return statements aren't allowed in Spark closures")
 
-private class ReturnStatementFinder extends ClassVisitor(ASM4) {
+private class ReturnStatementFinder extends ClassVisitor(ASM5) {
   override def visitMethod(access: Int, name: String, desc: String,
       sig: String, exceptions: Array[String]): MethodVisitor = {
     if (name.contains("apply")) {
-      new MethodVisitor(ASM4) {
+      new MethodVisitor(ASM5) {
         override def visitTypeInsn(op: Int, tp: String) {
           if (op == NEW && tp.contains("scala/runtime/NonLocalReturnControl")) {
             throw new ReturnStatementInClosureException
@@ -337,7 +337,7 @@ private class ReturnStatementFinder extends ClassVisitor(ASM4) {
         }
       }
     } else {
-      new MethodVisitor(ASM4) {}
+      new MethodVisitor(ASM5) {}
     }
   }
 }
@@ -361,7 +361,7 @@ private[util] class FieldAccessFinder(
     findTransitively: Boolean,
     specificMethod: Option[MethodIdentifier[_]] = None,
     visitedMethods: Set[MethodIdentifier[_]] = Set.empty)
-  extends ClassVisitor(ASM4) {
+  extends ClassVisitor(ASM5) {
 
   override def visitMethod(
       access: Int,
@@ -376,7 +376,7 @@ private[util] class FieldAccessFinder(
       return null
     }
 
-    new MethodVisitor(ASM4) {
+    new MethodVisitor(ASM5) {
       override def visitFieldInsn(op: Int, owner: String, name: String, desc: String) {
         if (op == GETFIELD) {
           for (cl <- fields.keys if cl.getName == owner.replace('/', '.')) {
@@ -385,7 +385,8 @@ private[util] class FieldAccessFinder(
         }
       }
 
-      override def visitMethodInsn(op: Int, owner: String, name: String, desc: String) {
+      override def visitMethodInsn(
+          op: Int, owner: String, name: String, desc: String, itf: Boolean) {
         for (cl <- fields.keys if cl.getName == owner.replace('/', '.')) {
           // Check for calls a getter method for a variable in an interpreter wrapper object.
           // This means that the corresponding field will be accessed, so we should save it.
@@ -408,7 +409,7 @@ private[util] class FieldAccessFinder(
   }
 }
 
-private class InnerClosureFinder(output: Set[Class[_]]) extends ClassVisitor(ASM4) {
+private class InnerClosureFinder(output: Set[Class[_]]) extends ClassVisitor(ASM5) {
   var myName: String = null
 
   // TODO: Recursively find inner closures that we indirectly reference, e.g.
@@ -423,9 +424,9 @@ private class InnerClosureFinder(output: Set[Class[_]]) extends ClassVisitor(ASM
 
   override def visitMethod(access: Int, name: String, desc: String,
       sig: String, exceptions: Array[String]): MethodVisitor = {
-    new MethodVisitor(ASM4) {
-      override def visitMethodInsn(op: Int, owner: String, name: String,
-          desc: String) {
+    new MethodVisitor(ASM5) {
+      override def visitMethodInsn(
+          op: Int, owner: String, name: String, desc: String, itf: Boolean) {
         val argTypes = Type.getArgumentTypes(desc)
         if (op == INVOKESPECIAL && name == "<init>" && argTypes.length > 0
             && argTypes(0).toString.startsWith("L") // is it an object?
diff --git a/docs/building-spark.md b/docs/building-spark.md
index 4f73adb85446..3d38edbdad4b 100644
--- a/docs/building-spark.md
+++ b/docs/building-spark.md
@@ -190,6 +190,10 @@ Running only Java 8 tests and nothing else.
 
     mvn install -DskipTests -Pjava8-tests
 
+or
+
+    sbt -Pjava8-tests java8-tests/test
+
 Java 8 tests are run when `-Pjava8-tests` profile is enabled, they will run in spite of `-DskipTests`.
 For these tests to run your system must have a JDK 8 installation.
 If you have JDK 8 installed but it is not the system default, you can set JAVA_HOME to point to JDK 8 before running the tests.
diff --git a/extras/java8-tests/src/test/scala/org/apache/spark/JDK8ScalaSuite.scala b/extras/java8-tests/src/test/scala/org/apache/spark/JDK8ScalaSuite.scala
new file mode 100644
index 000000000000..fa0681db4108
--- /dev/null
+++ b/extras/java8-tests/src/test/scala/org/apache/spark/JDK8ScalaSuite.scala
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark
+
+/**
+ * Test cases where JDK8-compiled Scala user code is used with Spark.
+ */
+class JDK8ScalaSuite extends SparkFunSuite with SharedSparkContext {
+  test("basic RDD closure test (SPARK-6152)") {
+    sc.parallelize(1 to 1000).map(x => x * x).count()
+  }
+}
diff --git a/graphx/pom.xml b/graphx/pom.xml
index 987b831021a5..8cd66c5b2e82 100644
--- a/graphx/pom.xml
+++ b/graphx/pom.xml
@@ -47,6 +47,10 @@
       <type>test-jar</type>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.xbean</groupId>
+      <artifactId>xbean-asm5-shaded</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.google.guava</groupId>
       <artifactId>guava</artifactId>
diff --git a/graphx/src/main/scala/org/apache/spark/graphx/util/BytecodeUtils.scala b/graphx/src/main/scala/org/apache/spark/graphx/util/BytecodeUtils.scala
index 74a7de18d416..a6d0cb640966 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/util/BytecodeUtils.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/util/BytecodeUtils.scala
@@ -22,11 +22,10 @@ import java.io.{ByteArrayInputStream, ByteArrayOutputStream}
 import scala.collection.mutable.HashSet
 import scala.language.existentials
 
-import org.apache.spark.util.Utils
-
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.{ClassReader, ClassVisitor, MethodVisitor}
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.Opcodes._
+import org.apache.xbean.asm5.{ClassReader, ClassVisitor, MethodVisitor}
+import org.apache.xbean.asm5.Opcodes._
 
+import org.apache.spark.util.Utils
 
 /**
  * Includes an utility function to test whether a function accesses a specific attribute
@@ -107,18 +106,19 @@ private[graphx] object BytecodeUtils {
    *   MethodInvocationFinder("spark/graph/Foo", "test")
    * its methodsInvoked variable will contain the set of methods invoked directly by
    * Foo.test(). Interface invocations are not returned as part of the result set because we cannot
-   * determine the actual metod invoked by inspecting the bytecode.
+   * determine the actual method invoked by inspecting the bytecode.
    */
   private class MethodInvocationFinder(className: String, methodName: String)
-    extends ClassVisitor(ASM4) {
+    extends ClassVisitor(ASM5) {
 
     val methodsInvoked = new HashSet[(Class[_], String)]
 
     override def visitMethod(access: Int, name: String, desc: String,
                              sig: String, exceptions: Array[String]): MethodVisitor = {
       if (name == methodName) {
-        new MethodVisitor(ASM4) {
-          override def visitMethodInsn(op: Int, owner: String, name: String, desc: String) {
+        new MethodVisitor(ASM5) {
+          override def visitMethodInsn(
+              op: Int, owner: String, name: String, desc: String, itf: Boolean) {
             if (op == INVOKEVIRTUAL || op == INVOKESPECIAL || op == INVOKESTATIC) {
               if (!skipClass(owner)) {
                 methodsInvoked.add((Utils.classForName(owner.replace("/", ".")), name))
diff --git a/pom.xml b/pom.xml
index c499a80aa0f4..01afa8061789 100644
--- a/pom.xml
+++ b/pom.xml
@@ -393,6 +393,14 @@
           </exclusion>
         </exclusions>
       </dependency>
+      <!-- This artifact is a shaded version of ASM 5.0.4. The POM that was used to produce this
+           is at https://github.com/apache/geronimo-xbean/tree/xbean-4.4/xbean-asm5-shaded
+           For context on why we shade ASM, see SPARK-782 and SPARK-6152. -->
+      <dependency>
+        <groupId>org.apache.xbean</groupId>
+        <artifactId>xbean-asm5-shaded</artifactId>
+        <version>4.4</version>
+      </dependency>
 
       <!-- Shaded deps marked as provided. These are promoted to compile scope
            in the modules where we want the shaded classes to appear in the
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index b7c619224329..570c9e50ed1f 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -57,6 +57,9 @@ object BuildCommons {
   val sparkHome = buildLocation
 
   val testTempDir = s"$sparkHome/target/tmp"
+
+  val javacJVMVersion = settingKey[String]("source and target JVM version for javac")
+  val scalacJVMVersion = settingKey[String]("source and target JVM version for scalac")
 }
 
 object SparkBuild extends PomBuild {
@@ -154,9 +157,17 @@ object SparkBuild extends PomBuild {
       if (major.toInt >= 1 && minor.toInt >= 8) Seq("-Xdoclint:all", "-Xdoclint:-missing") else Seq.empty
     },
 
-    javacOptions in Compile ++= Seq("-encoding", "UTF-8"),
+    javacJVMVersion := "1.7",
+    scalacJVMVersion := "1.7",
+
+    javacOptions in Compile ++= Seq(
+      "-encoding", "UTF-8",
+      "-source", javacJVMVersion.value,
+      "-target", javacJVMVersion.value
+    ),
 
     scalacOptions in Compile ++= Seq(
+      s"-target:jvm-${scalacJVMVersion.value}",
       "-sourcepath", (baseDirectory in ThisBuild).value.getAbsolutePath  // Required for relative source links in scaladoc
     ),
 
@@ -241,8 +252,9 @@ object SparkBuild extends PomBuild {
 
   enable(Flume.settings)(streamingFlumeSink)
 
-  enable(DockerIntegrationTests.settings)(dockerIntegrationTests)
+  enable(Java8TestSettings.settings)(java8Tests)
 
+  enable(DockerIntegrationTests.settings)(dockerIntegrationTests)
 
   /**
    * Adds the ability to run the spark shell directly from SBT without building an assembly
@@ -591,6 +603,16 @@ object Unidoc {
   )
 }
 
+object Java8TestSettings {
+  import BuildCommons._
+
+  lazy val settings = Seq(
+    javacJVMVersion := "1.8",
+    // Targeting Java 8 bytecode is only supported in Scala 2.11.4 and higher:
+    scalacJVMVersion := (if (System.getProperty("scala-2.11") == "true") "1.8" else "1.7")
+  )
+}
+
 object TestSettings {
   import BuildCommons._
 
diff --git a/repl/pom.xml b/repl/pom.xml
index fb0a0e1286c8..154c99d23c7f 100644
--- a/repl/pom.xml
+++ b/repl/pom.xml
@@ -95,6 +95,10 @@
       <groupId>org.apache.spark</groupId>
       <artifactId>spark-test-tags_${scala.binary.version}</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.apache.xbean</groupId>
+      <artifactId>xbean-asm5-shaded</artifactId>
+    </dependency>
 
     <!-- Explicit listing of transitive deps that are shaded. Otherwise, odd compiler crashes. -->
     <dependency>
diff --git a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
index 004941d5f50a..3d2d235a00c9 100644
--- a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
+++ b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
@@ -23,15 +23,14 @@ import java.net.{HttpURLConnection, URI, URL, URLEncoder}
 import scala.util.control.NonFatal
 
 import org.apache.hadoop.fs.{FileSystem, Path}
+import org.apache.xbean.asm5._
+import org.apache.xbean.asm5.Opcodes._
 
 import org.apache.spark.{SparkConf, SparkEnv, Logging}
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.util.Utils
 import org.apache.spark.util.ParentClassLoader
 
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm._
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.Opcodes._
-
 /**
  * A ClassLoader that reads classes from a Hadoop FileSystem or HTTP URI,
  * used to load classes defined by the interpreter when the REPL is used.
@@ -192,7 +191,7 @@ class ExecutorClassLoader(conf: SparkConf, classUri: String, parent: ClassLoader
 }
 
 class ConstructorCleaner(className: String, cv: ClassVisitor)
-extends ClassVisitor(ASM4, cv) {
+extends ClassVisitor(ASM5, cv) {
   override def visitMethod(access: Int, name: String, desc: String,
       sig: String, exceptions: Array[String]): MethodVisitor = {
     val mv = cv.visitMethod(access, name, desc, sig, exceptions)
@@ -202,7 +201,7 @@ extends ClassVisitor(ASM4, cv) {
       // field in the class to point to it, but do nothing otherwise.
       mv.visitCode()
       mv.visitVarInsn(ALOAD, 0) // load this
-      mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V")
+      mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false)
       mv.visitVarInsn(ALOAD, 0) // load this
       // val classType = className.replace('.', '/')
       // mv.visitFieldInsn(PUTSTATIC, classType, "MODULE$", "L" + classType + ";")
diff --git a/sql/core/pom.xml b/sql/core/pom.xml
index c96855e261ee..9fd6b5a07ec8 100644
--- a/sql/core/pom.xml
+++ b/sql/core/pom.xml
@@ -110,6 +110,11 @@
       <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.apache.xbean</groupId>
+      <artifactId>xbean-asm5-shaded</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index 4b4f5c6c45c7..97162249d995 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -21,8 +21,8 @@ import java.io.{ByteArrayInputStream, ByteArrayOutputStream}
 
 import scala.collection.mutable
 
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm._
-import com.esotericsoftware.reflectasm.shaded.org.objectweb.asm.Opcodes._
+import org.apache.xbean.asm5._
+import org.apache.xbean.asm5.Opcodes._
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql._
@@ -41,22 +41,20 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
       l += 1L
       l.add(1L)
     }
-    BoxingFinder.getClassReader(f.getClass).foreach { cl =>
-      val boxingFinder = new BoxingFinder()
-      cl.accept(boxingFinder, 0)
-      assert(boxingFinder.boxingInvokes.isEmpty, s"Found boxing: ${boxingFinder.boxingInvokes}")
-    }
+    val cl = BoxingFinder.getClassReader(f.getClass)
+    val boxingFinder = new BoxingFinder()
+    cl.accept(boxingFinder, 0)
+    assert(boxingFinder.boxingInvokes.isEmpty, s"Found boxing: ${boxingFinder.boxingInvokes}")
   }
 
   test("Normal accumulator should do boxing") {
     // We need this test to make sure BoxingFinder works.
     val l = sparkContext.accumulator(0L)
     val f = () => { l += 1L }
-    BoxingFinder.getClassReader(f.getClass).foreach { cl =>
-      val boxingFinder = new BoxingFinder()
-      cl.accept(boxingFinder, 0)
-      assert(boxingFinder.boxingInvokes.nonEmpty, "Found find boxing in this test")
-    }
+    val cl = BoxingFinder.getClassReader(f.getClass)
+    val boxingFinder = new BoxingFinder()
+    cl.accept(boxingFinder, 0)
+    assert(boxingFinder.boxingInvokes.nonEmpty, "Found find boxing in this test")
   }
 
   /**
@@ -486,7 +484,7 @@ private class BoxingFinder(
     method: MethodIdentifier[_] = null,
     val boxingInvokes: mutable.Set[String] = mutable.Set.empty,
     visitedMethods: mutable.Set[MethodIdentifier[_]] = mutable.Set.empty)
-  extends ClassVisitor(ASM4) {
+  extends ClassVisitor(ASM5) {
 
   private val primitiveBoxingClassName =
     Set("java/lang/Long",
@@ -503,11 +501,12 @@ private class BoxingFinder(
     MethodVisitor = {
     if (method != null && (method.name != name || method.desc != desc)) {
       // If method is specified, skip other methods.
-      return new MethodVisitor(ASM4) {}
+      return new MethodVisitor(ASM5) {}
     }
 
-    new MethodVisitor(ASM4) {
-      override def visitMethodInsn(op: Int, owner: String, name: String, desc: String) {
+    new MethodVisitor(ASM5) {
+      override def visitMethodInsn(
+          op: Int, owner: String, name: String, desc: String, itf: Boolean) {
         if (op == INVOKESPECIAL && name == "<init>" || op == INVOKESTATIC && name == "valueOf") {
           if (primitiveBoxingClassName.contains(owner)) {
             // Find boxing methods, e.g, new java.lang.Long(l) or java.lang.Long.valueOf(l)
@@ -522,10 +521,9 @@ private class BoxingFinder(
           if (!visitedMethods.contains(m)) {
             // Keep track of visited methods to avoid potential infinite cycles
             visitedMethods += m
-            BoxingFinder.getClassReader(classOfMethodOwner).foreach { cl =>
-              visitedMethods += m
-              cl.accept(new BoxingFinder(m, boxingInvokes, visitedMethods), 0)
-            }
+            val cl = BoxingFinder.getClassReader(classOfMethodOwner)
+            visitedMethods += m
+            cl.accept(new BoxingFinder(m, boxingInvokes, visitedMethods), 0)
           }
         }
       }
@@ -535,22 +533,14 @@ private class BoxingFinder(
 
 private object BoxingFinder {
 
-  def getClassReader(cls: Class[_]): Option[ClassReader] = {
+  def getClassReader(cls: Class[_]): ClassReader = {
     val className = cls.getName.replaceFirst("^.*\\.", "") + ".class"
     val resourceStream = cls.getResourceAsStream(className)
     val baos = new ByteArrayOutputStream(128)
     // Copy data over, before delegating to ClassReader -
     // else we can run out of open file handles.
     Utils.copyStream(resourceStream, baos, true)
-    // ASM4 doesn't support Java 8 classes, which requires ASM5.
-    // So if the class is ASM5 (E.g., java.lang.Long when using JDK8 runtime to run these codes),
-    // then ClassReader will throw IllegalArgumentException,
-    // However, since this is only for testing, it's safe to skip these classes.
-    try {
-      Some(new ClassReader(new ByteArrayInputStream(baos.toByteArray)))
-    } catch {
-      case _: IllegalArgumentException => None
-    }
+    new ClassReader(new ByteArrayInputStream(baos.toByteArray))
   }
 
 }

From 27029bc8f6246514bd0947500c94cf38dc8616c3 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Wed, 11 Nov 2015 11:24:55 -0800
Subject: [PATCH 633/896] [SPARK-11639][STREAMING][FLAKY-TEST] Implement
 BlockingWriteAheadLog for testing the BatchedWriteAheadLog

Several elements could be drained if the main thread is not fast enough. zsxwing warned me about a similar problem, but missed it here :( Submitting the fix using a waiter.

cc tdas

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9605 from brkyvz/fix-flaky-test.
---
 .../streaming/util/BatchedWriteAheadLog.scala |   3 +
 .../streaming/util/WriteAheadLogSuite.scala   | 124 +++++++++++-------
 2 files changed, 80 insertions(+), 47 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
index 9727ed2ba144..6e6ed8d81972 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/BatchedWriteAheadLog.scala
@@ -182,6 +182,9 @@ private[util] class BatchedWriteAheadLog(val wrappedLog: WriteAheadLog, conf: Sp
       buffer.clear()
     }
   }
+
+  /** Method for querying the queue length. Should only be used in tests. */
+  private def getQueueLength(): Int = walWriteQueue.size()
 }
 
 /** Static methods for aggregating and de-aggregating records. */
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index e96f4c2a2934..9e13f25c2efe 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -18,15 +18,14 @@ package org.apache.spark.streaming.util
 
 import java.io._
 import java.nio.ByteBuffer
-import java.util.concurrent.{ExecutionException, ThreadPoolExecutor}
-import java.util.concurrent.atomic.AtomicInteger
+import java.util.{Iterator => JIterator}
+import java.util.concurrent.ThreadPoolExecutor
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
 import scala.concurrent._
 import scala.concurrent.duration._
 import scala.language.{implicitConversions, postfixOps}
-import scala.util.{Failure, Success}
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
@@ -37,12 +36,12 @@ import org.mockito.invocation.InvocationOnMock
 import org.mockito.stubbing.Answer
 import org.scalatest.concurrent.Eventually
 import org.scalatest.concurrent.Eventually._
-import org.scalatest.{BeforeAndAfterEach, BeforeAndAfter}
+import org.scalatest.{PrivateMethodTester, BeforeAndAfterEach, BeforeAndAfter}
 import org.scalatest.mock.MockitoSugar
 
 import org.apache.spark.streaming.scheduler._
 import org.apache.spark.util.{ThreadUtils, ManualClock, Utils}
-import org.apache.spark.{SparkException, SparkConf, SparkFunSuite}
+import org.apache.spark.{SparkConf, SparkFunSuite}
 
 /** Common tests for WriteAheadLogs that we would like to test with different configurations. */
 abstract class CommonWriteAheadLogTests(
@@ -315,7 +314,11 @@ class FileBasedWriteAheadLogWithFileCloseAfterWriteSuite
 class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
     allowBatching = true,
     closeFileAfterWrite = false,
-    "BatchedWriteAheadLog") with MockitoSugar with BeforeAndAfterEach with Eventually {
+    "BatchedWriteAheadLog")
+  with MockitoSugar
+  with BeforeAndAfterEach
+  with Eventually
+  with PrivateMethodTester {
 
   import BatchedWriteAheadLog._
   import WriteAheadLogSuite._
@@ -326,6 +329,8 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
   private var walBatchingExecutionContext: ExecutionContextExecutorService = _
   private val sparkConf = new SparkConf()
 
+  private val queueLength = PrivateMethod[Int]('getQueueLength)
+
   override def beforeEach(): Unit = {
     wal = mock[WriteAheadLog]
     walHandle = mock[WriteAheadLogRecordHandle]
@@ -366,7 +371,7 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
   }
 
   // we make the write requests in separate threads so that we don't block the test thread
-  private def promiseWriteEvent(wal: WriteAheadLog, event: String, time: Long): Promise[Unit] = {
+  private def writeAsync(wal: WriteAheadLog, event: String, time: Long): Promise[Unit] = {
     val p = Promise[Unit]()
     p.completeWith(Future {
       val v = wal.write(event, time)
@@ -375,28 +380,9 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
     p
   }
 
-  /**
-   * In order to block the writes on the writer thread, we mock the write method, and block it
-   * for some time with a promise.
-   */
-  private def writeBlockingPromise(wal: WriteAheadLog): Promise[Any] = {
-    // we would like to block the write so that we can queue requests
-    val promise = Promise[Any]()
-    when(wal.write(any[ByteBuffer], any[Long])).thenAnswer(
-      new Answer[WriteAheadLogRecordHandle] {
-        override def answer(invocation: InvocationOnMock): WriteAheadLogRecordHandle = {
-          Await.ready(promise.future, 4.seconds)
-          walHandle
-        }
-      }
-    )
-    promise
-  }
-
   test("BatchedWriteAheadLog - name log with aggregated entries with the timestamp of last entry") {
-    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
-    // block the write so that we can batch some records
-    val promise = writeBlockingPromise(wal)
+    val blockingWal = new BlockingWriteAheadLog(wal, walHandle)
+    val batchedWal = new BatchedWriteAheadLog(blockingWal, sparkConf)
 
     val event1 = "hello"
     val event2 = "world"
@@ -406,21 +392,27 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
 
     // The queue.take() immediately takes the 3, and there is nothing left in the queue at that
     // moment. Then the promise blocks the writing of 3. The rest get queued.
-    promiseWriteEvent(batchedWal, event1, 3L)
-    // rest of the records will be batched while it takes 3 to get written
-    promiseWriteEvent(batchedWal, event2, 5L)
-    promiseWriteEvent(batchedWal, event3, 8L)
-    promiseWriteEvent(batchedWal, event4, 12L)
-    promiseWriteEvent(batchedWal, event5, 10L)
+    writeAsync(batchedWal, event1, 3L)
+    eventually(timeout(1 second)) {
+      assert(blockingWal.isBlocked)
+      assert(batchedWal.invokePrivate(queueLength()) === 0)
+    }
+    // rest of the records will be batched while it takes time for 3 to get written
+    writeAsync(batchedWal, event2, 5L)
+    writeAsync(batchedWal, event3, 8L)
+    writeAsync(batchedWal, event4, 12L)
+    writeAsync(batchedWal, event5, 10L)
     eventually(timeout(1 second)) {
       assert(walBatchingThreadPool.getActiveCount === 5)
+      assert(batchedWal.invokePrivate(queueLength()) === 4)
     }
-    promise.success(true)
+    blockingWal.allowWrite()
 
     val buffer1 = wrapArrayArrayByte(Array(event1))
     val buffer2 = wrapArrayArrayByte(Array(event2, event3, event4, event5))
 
     eventually(timeout(1 second)) {
+      assert(batchedWal.invokePrivate(queueLength()) === 0)
       verify(wal, times(1)).write(meq(buffer1), meq(3L))
       // the file name should be the timestamp of the last record, as events should be naturally
       // in order of timestamp, and we need the last element.
@@ -437,27 +429,32 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
   }
 
   test("BatchedWriteAheadLog - fail everything in queue during shutdown") {
-    val batchedWal = new BatchedWriteAheadLog(wal, sparkConf)
+    val blockingWal = new BlockingWriteAheadLog(wal, walHandle)
+    val batchedWal = new BatchedWriteAheadLog(blockingWal, sparkConf)
 
-    // block the write so that we can batch some records
-    writeBlockingPromise(wal)
-
-    val event1 = ("hello", 3L)
-    val event2 = ("world", 5L)
-    val event3 = ("this", 8L)
-    val event4 = ("is", 9L)
-    val event5 = ("doge", 10L)
+    val event1 = "hello"
+    val event2 = "world"
+    val event3 = "this"
 
     // The queue.take() immediately takes the 3, and there is nothing left in the queue at that
     // moment. Then the promise blocks the writing of 3. The rest get queued.
-    val writePromises = Seq(event1, event2, event3, event4, event5).map { event =>
-      promiseWriteEvent(batchedWal, event._1, event._2)
+    val promise1 = writeAsync(batchedWal, event1, 3L)
+    eventually(timeout(1 second)) {
+      assert(blockingWal.isBlocked)
+      assert(batchedWal.invokePrivate(queueLength()) === 0)
     }
+    // rest of the records will be batched while it takes time for 3 to get written
+    val promise2 = writeAsync(batchedWal, event2, 5L)
+    val promise3 = writeAsync(batchedWal, event3, 8L)
 
     eventually(timeout(1 second)) {
-      assert(walBatchingThreadPool.getActiveCount === 5)
+      assert(walBatchingThreadPool.getActiveCount === 3)
+      assert(blockingWal.isBlocked)
+      assert(batchedWal.invokePrivate(queueLength()) === 2) // event1 is being written
     }
 
+    val writePromises = Seq(promise1, promise2, promise3)
+
     batchedWal.close()
     eventually(timeout(1 second)) {
       assert(writePromises.forall(_.isCompleted))
@@ -641,4 +638,37 @@ object WriteAheadLogSuite {
   def wrapArrayArrayByte[T](records: Array[T]): ByteBuffer = {
     ByteBuffer.wrap(Utils.serialize[Array[Array[Byte]]](records.map(Utils.serialize[T])))
   }
+
+  /**
+   * A wrapper WriteAheadLog that blocks the write function to allow batching with the
+   * BatchedWriteAheadLog.
+   */
+  class BlockingWriteAheadLog(
+      wal: WriteAheadLog,
+      handle: WriteAheadLogRecordHandle) extends WriteAheadLog {
+    @volatile private var isWriteCalled: Boolean = false
+    @volatile private var blockWrite: Boolean = true
+
+    override def write(record: ByteBuffer, time: Long): WriteAheadLogRecordHandle = {
+      isWriteCalled = true
+      eventually(Eventually.timeout(2 second)) {
+        assert(!blockWrite)
+      }
+      wal.write(record, time)
+      isWriteCalled = false
+      handle
+    }
+    override def read(segment: WriteAheadLogRecordHandle): ByteBuffer = wal.read(segment)
+    override def readAll(): JIterator[ByteBuffer] = wal.readAll()
+    override def clean(threshTime: Long, waitForCompletion: Boolean): Unit = {
+      wal.clean(threshTime, waitForCompletion)
+    }
+    override def close(): Unit = wal.close()
+
+    def allowWrite(): Unit = {
+      blockWrite = false
+    }
+
+    def isBlocked: Boolean = isWriteCalled
+  }
 }

From df97df2b39194f60051f78cce23f0ba6cfe4b1df Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 11 Nov 2015 12:47:02 -0800
Subject: [PATCH 634/896] [SPARK-11644][SQL] Remove the option to turn off
 unsafe and codegen.

Author: Reynold Xin <rxin@databricks.com>

Closes #9618 from rxin/SPARK-11644.
---
 .../scala/org/apache/spark/sql/SQLConf.scala  |  27 +---
 .../apache/spark/sql/execution/Exchange.scala |   2 +-
 .../spark/sql/execution/QueryExecution.scala  |   1 -
 .../spark/sql/execution/SparkPlan.scala       | 120 +++++++----------
 .../spark/sql/execution/SparkPlanner.scala    |   4 -
 .../spark/sql/execution/SparkStrategies.scala |   6 +-
 .../spark/sql/execution/aggregate/utils.scala |  13 +-
 .../apache/spark/sql/execution/commands.scala |  27 ++++
 .../spark/sql/execution/joins/HashJoin.scala  |   4 +-
 .../sql/execution/joins/HashOuterJoin.scala   |   6 +-
 .../sql/execution/joins/HashSemiJoin.scala    |   9 +-
 .../sql/execution/joins/SortMergeJoin.scala   |   7 +-
 .../execution/joins/SortMergeOuterJoin.scala  |   7 +-
 .../sql/execution/local/HashJoinNode.scala    |   5 +-
 .../spark/sql/execution/local/LocalNode.scala |  80 +++++-------
 .../apache/spark/sql/sources/interfaces.scala |   8 +-
 .../org/apache/spark/sql/DataFrameSuite.scala |  31 +----
 .../spark/sql/DataFrameTungstenSuite.scala    |  68 +++++-----
 .../org/apache/spark/sql/SQLQuerySuite.scala  |  23 +---
 .../sql/execution/TungstenSortSuite.scala     |  13 --
 .../execution/joins/BroadcastJoinSuite.scala  |   4 +-
 .../execution/local/HashJoinNodeSuite.scala   |  23 +---
 .../local/NestedLoopJoinNodeSuite.scala       |  21 +--
 .../execution/metric/SQLMetricsSuite.scala    | 123 +++++-------------
 .../execution/AggregationQuerySuite.scala     |  44 +------
 .../sql/hive/execution/HiveExplainSuite.scala |   3 +-
 .../sql/hive/execution/HiveUDFSuite.scala     |  72 +++++-----
 27 files changed, 257 insertions(+), 494 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 57d7d30e0eca..e02b502b7b4d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -252,24 +252,8 @@ private[spark] object SQLConf {
         "not be provided to ExchangeCoordinator.",
       isPublic = false)
 
-  val TUNGSTEN_ENABLED = booleanConf("spark.sql.tungsten.enabled",
-    defaultValue = Some(true),
-    doc = "When true, use the optimized Tungsten physical execution backend which explicitly " +
-          "manages memory and dynamically generates bytecode for expression evaluation.")
-
-  val CODEGEN_ENABLED = booleanConf("spark.sql.codegen",
-    defaultValue = Some(true),  // use TUNGSTEN_ENABLED as default
-    doc = "When true, code will be dynamically generated at runtime for expression evaluation in" +
-      " a specific query.",
-    isPublic = false)
-
-  val UNSAFE_ENABLED = booleanConf("spark.sql.unsafe.enabled",
-    defaultValue = Some(true),  // use TUNGSTEN_ENABLED as default
-    doc = "When true, use the new optimized Tungsten physical execution backend.",
-    isPublic = false)
-
   val SUBEXPRESSION_ELIMINATION_ENABLED = booleanConf("spark.sql.subexpressionElimination.enabled",
-    defaultValue = Some(true),  // use CODEGEN_ENABLED as default
+    defaultValue = Some(true),
     doc = "When true, common subexpressions will be eliminated.",
     isPublic = false)
 
@@ -475,6 +459,9 @@ private[spark] object SQLConf {
     val MAPRED_REDUCE_TASKS = "mapred.reduce.tasks"
     val EXTERNAL_SORT = "spark.sql.planner.externalSort"
     val USE_SQL_AGGREGATE2 = "spark.sql.useAggregate2"
+    val TUNGSTEN_ENABLED = "spark.sql.tungsten.enabled"
+    val CODEGEN_ENABLED = "spark.sql.codegen"
+    val UNSAFE_ENABLED = "spark.sql.unsafe.enabled"
   }
 }
 
@@ -541,14 +528,10 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def sortMergeJoinEnabled: Boolean = getConf(SORTMERGE_JOIN)
 
-  private[spark] def codegenEnabled: Boolean = getConf(CODEGEN_ENABLED, getConf(TUNGSTEN_ENABLED))
-
   def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE)
 
-  private[spark] def unsafeEnabled: Boolean = getConf(UNSAFE_ENABLED, getConf(TUNGSTEN_ENABLED))
-
   private[spark] def subexpressionEliminationEnabled: Boolean =
-    getConf(SUBEXPRESSION_ELIMINATION_ENABLED, codegenEnabled)
+    getConf(SUBEXPRESSION_ELIMINATION_ENABLED)
 
   private[spark] def autoBroadcastJoinThreshold: Int = getConf(AUTO_BROADCASTJOIN_THRESHOLD)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index b733b26987bc..d0e4e068092f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -58,7 +58,7 @@ case class Exchange(
    * Returns true iff we can support the data type, and we are not doing range partitioning.
    */
   private lazy val tungstenMode: Boolean = {
-    unsafeEnabled && codegenEnabled && GenerateUnsafeProjection.canSupport(child.schema) &&
+    GenerateUnsafeProjection.canSupport(child.schema) &&
       !newPartitioning.isInstanceOf[RangePartitioning]
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
index 77843f53b9bd..5da5aea17e25 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
@@ -77,7 +77,6 @@ class QueryExecution(val sqlContext: SQLContext, val logical: LogicalPlan) {
        |${stringOrError(optimizedPlan)}
        |== Physical Plan ==
        |${stringOrError(executedPlan)}
-       |Code Generation: ${stringOrError(executedPlan.codegenEnabled)}
     """.stripMargin.trim
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
index 8650ac500b65..1b833002f434 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
@@ -54,18 +54,8 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
   protected def sparkContext = sqlContext.sparkContext
 
   // sqlContext will be null when we are being deserialized on the slaves.  In this instance
-  // the value of codegenEnabled/unsafeEnabled will be set by the desserializer after the
+  // the value of subexpressionEliminationEnabled will be set by the desserializer after the
   // constructor has run.
-  val codegenEnabled: Boolean = if (sqlContext != null) {
-    sqlContext.conf.codegenEnabled
-  } else {
-    false
-  }
-  val unsafeEnabled: Boolean = if (sqlContext != null) {
-    sqlContext.conf.unsafeEnabled
-  } else {
-    false
-  }
   val subexpressionEliminationEnabled: Boolean = if (sqlContext != null) {
     sqlContext.conf.subexpressionEliminationEnabled
   } else {
@@ -233,83 +223,63 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
 
   protected def newProjection(
       expressions: Seq[Expression], inputSchema: Seq[Attribute]): Projection = {
-    log.debug(
-      s"Creating Projection: $expressions, inputSchema: $inputSchema, codegen:$codegenEnabled")
-    if (codegenEnabled) {
-      try {
-        GenerateProjection.generate(expressions, inputSchema)
-      } catch {
-        case e: Exception =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate projection, fallback to interpret", e)
-            new InterpretedProjection(expressions, inputSchema)
-          }
-      }
-    } else {
-      new InterpretedProjection(expressions, inputSchema)
+    log.debug(s"Creating Projection: $expressions, inputSchema: $inputSchema")
+    try {
+      GenerateProjection.generate(expressions, inputSchema)
+    } catch {
+      case e: Exception =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate projection, fallback to interpret", e)
+          new InterpretedProjection(expressions, inputSchema)
+        }
     }
   }
 
   protected def newMutableProjection(
-      expressions: Seq[Expression],
-      inputSchema: Seq[Attribute]): () => MutableProjection = {
-    log.debug(
-      s"Creating MutableProj: $expressions, inputSchema: $inputSchema, codegen:$codegenEnabled")
-    if(codegenEnabled) {
-      try {
-        GenerateMutableProjection.generate(expressions, inputSchema)
-      } catch {
-        case e: Exception =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate mutable projection, fallback to interpreted", e)
-            () => new InterpretedMutableProjection(expressions, inputSchema)
-          }
-      }
-    } else {
-      () => new InterpretedMutableProjection(expressions, inputSchema)
+      expressions: Seq[Expression], inputSchema: Seq[Attribute]): () => MutableProjection = {
+    log.debug(s"Creating MutableProj: $expressions, inputSchema: $inputSchema")
+    try {
+      GenerateMutableProjection.generate(expressions, inputSchema)
+    } catch {
+      case e: Exception =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate mutable projection, fallback to interpreted", e)
+          () => new InterpretedMutableProjection(expressions, inputSchema)
+        }
     }
   }
 
   protected def newPredicate(
       expression: Expression, inputSchema: Seq[Attribute]): (InternalRow) => Boolean = {
-    if (codegenEnabled) {
-      try {
-        GeneratePredicate.generate(expression, inputSchema)
-      } catch {
-        case e: Exception =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate predicate, fallback to interpreted", e)
-            InterpretedPredicate.create(expression, inputSchema)
-          }
-      }
-    } else {
-      InterpretedPredicate.create(expression, inputSchema)
+    try {
+      GeneratePredicate.generate(expression, inputSchema)
+    } catch {
+      case e: Exception =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate predicate, fallback to interpreted", e)
+          InterpretedPredicate.create(expression, inputSchema)
+        }
     }
   }
 
   protected def newOrdering(
-      order: Seq[SortOrder],
-      inputSchema: Seq[Attribute]): Ordering[InternalRow] = {
-    if (codegenEnabled) {
-      try {
-        GenerateOrdering.generate(order, inputSchema)
-      } catch {
-        case e: Exception =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate ordering, fallback to interpreted", e)
-            new InterpretedOrdering(order, inputSchema)
-          }
-      }
-    } else {
-      new InterpretedOrdering(order, inputSchema)
+      order: Seq[SortOrder], inputSchema: Seq[Attribute]): Ordering[InternalRow] = {
+    try {
+      GenerateOrdering.generate(order, inputSchema)
+    } catch {
+      case e: Exception =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate ordering, fallback to interpreted", e)
+          new InterpretedOrdering(order, inputSchema)
+        }
     }
   }
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
index a10d1edcc91a..cf482ae4a05e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
@@ -27,10 +27,6 @@ import org.apache.spark.sql.execution.datasources.DataSourceStrategy
 class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
   val sparkContext: SparkContext = sqlContext.sparkContext
 
-  def codegenEnabled: Boolean = sqlContext.conf.codegenEnabled
-
-  def unsafeEnabled: Boolean = sqlContext.conf.unsafeEnabled
-
   def numPartitions: Int = sqlContext.conf.numShufflePartitions
 
   def strategies: Seq[Strategy] =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index d65cb1bae7fb..96242f160aa5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -327,8 +327,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
      *               if necessary.
      */
     def getSortOperator(sortExprs: Seq[SortOrder], global: Boolean, child: SparkPlan): SparkPlan = {
-      if (sqlContext.conf.unsafeEnabled && sqlContext.conf.codegenEnabled &&
-        TungstenSort.supportsSchema(child.schema)) {
+      if (TungstenSort.supportsSchema(child.schema)) {
         execution.TungstenSort(sortExprs, global, child)
       } else {
         execution.Sort(sortExprs, global, child)
@@ -368,8 +367,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
       case logical.Project(projectList, child) =>
         // If unsafe mode is enabled and we support these data types in Unsafe, use the
         // Tungsten project. Otherwise, use the normal project.
-        if (sqlContext.conf.unsafeEnabled &&
-          UnsafeProjection.canSupport(projectList) && UnsafeProjection.canSupport(child.schema)) {
+        if (UnsafeProjection.canSupport(projectList) && UnsafeProjection.canSupport(child.schema)) {
           execution.TungstenProject(projectList, planLater(child)) :: Nil
         } else {
           execution.Project(projectList, planLater(child)) :: Nil
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
index 79abf2d5929b..a70e41436c7a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/utils.scala
@@ -59,13 +59,10 @@ object Utils {
       resultExpressions: Seq[NamedExpression],
       child: SparkPlan): Seq[SparkPlan] = {
     // Check if we can use TungstenAggregate.
-    val usesTungstenAggregate =
-      child.sqlContext.conf.unsafeEnabled &&
-      TungstenAggregate.supportsAggregate(
+    val usesTungstenAggregate = TungstenAggregate.supportsAggregate(
         groupingExpressions,
         aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
-
     // 1. Create an Aggregate Operator for partial aggregations.
 
     val groupingAttributes = groupingExpressions.map(_.toAttribute)
@@ -144,11 +141,9 @@ object Utils {
       child: SparkPlan): Seq[SparkPlan] = {
 
     val aggregateExpressions = functionsWithDistinct ++ functionsWithoutDistinct
-    val usesTungstenAggregate =
-      child.sqlContext.conf.unsafeEnabled &&
-        TungstenAggregate.supportsAggregate(
-          groupingExpressions,
-          aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
+    val usesTungstenAggregate = TungstenAggregate.supportsAggregate(
+      groupingExpressions,
+      aggregateExpressions.flatMap(_.aggregateFunction.aggBufferAttributes))
 
     // functionsWithDistinct is guaranteed to be non-empty. Even though it may contain more than one
     // DISTINCT aggregate function, all of those functions will have the same column expression.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index 8b2755a58757..e29c281b951f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -121,6 +121,33 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
       }
       (keyValueOutput, runFunc)
 
+    case Some((SQLConf.Deprecated.TUNGSTEN_ENABLED, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.TUNGSTEN_ENABLED} is deprecated and " +
+            s"will be ignored. Tungsten will continue to be used.")
+        Seq(Row(SQLConf.Deprecated.TUNGSTEN_ENABLED, "true"))
+      }
+      (keyValueOutput, runFunc)
+
+    case Some((SQLConf.Deprecated.CODEGEN_ENABLED, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.CODEGEN_ENABLED} is deprecated and " +
+            s"will be ignored. Codegen will continue to be used.")
+        Seq(Row(SQLConf.Deprecated.CODEGEN_ENABLED, "true"))
+      }
+      (keyValueOutput, runFunc)
+
+    case Some((SQLConf.Deprecated.UNSAFE_ENABLED, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.UNSAFE_ENABLED} is deprecated and " +
+            s"will be ignored. Unsafe mode will continue to be used.")
+        Seq(Row(SQLConf.Deprecated.UNSAFE_ENABLED, "true"))
+      }
+      (keyValueOutput, runFunc)
+
     // Configures a single property.
     case Some((key, Some(value))) =>
       val runFunc = (sqlContext: SQLContext) => {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
index 7ce4a517838c..997f7f494f4a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
@@ -45,9 +45,7 @@ trait HashJoin {
   override def output: Seq[Attribute] = left.output ++ right.output
 
   protected[this] def isUnsafeMode: Boolean = {
-    (self.codegenEnabled && self.unsafeEnabled
-      && UnsafeProjection.canSupport(buildKeys)
-      && UnsafeProjection.canSupport(self.schema))
+    UnsafeProjection.canSupport(buildKeys) && UnsafeProjection.canSupport(self.schema)
   }
 
   override def outputsUnsafeRows: Boolean = isUnsafeMode
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
index 15b06b1537f8..3633f356b014 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
@@ -65,9 +65,9 @@ trait HashOuterJoin {
   }
 
   protected[this] def isUnsafeMode: Boolean = {
-    (self.codegenEnabled && self.unsafeEnabled && joinType != FullOuter
-      && UnsafeProjection.canSupport(buildKeys)
-      && UnsafeProjection.canSupport(self.schema))
+    joinType != FullOuter &&
+      UnsafeProjection.canSupport(buildKeys) &&
+      UnsafeProjection.canSupport(self.schema)
   }
 
   override def outputsUnsafeRows: Boolean = isUnsafeMode
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
index beb141ade616..c7d13e0a72a8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
@@ -34,11 +34,10 @@ trait HashSemiJoin {
   override def output: Seq[Attribute] = left.output
 
   protected[this] def supportUnsafe: Boolean = {
-    (self.codegenEnabled && self.unsafeEnabled
-      && UnsafeProjection.canSupport(leftKeys)
-      && UnsafeProjection.canSupport(rightKeys)
-      && UnsafeProjection.canSupport(left.schema)
-      && UnsafeProjection.canSupport(right.schema))
+    UnsafeProjection.canSupport(leftKeys) &&
+      UnsafeProjection.canSupport(rightKeys) &&
+      UnsafeProjection.canSupport(left.schema) &&
+      UnsafeProjection.canSupport(right.schema)
   }
 
   override def outputsUnsafeRows: Boolean = supportUnsafe
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
index 17030947b7bb..7aee8e3dd3fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
@@ -54,10 +54,9 @@ case class SortMergeJoin(
     requiredOrders(leftKeys) :: requiredOrders(rightKeys) :: Nil
 
   protected[this] def isUnsafeMode: Boolean = {
-    (codegenEnabled && unsafeEnabled
-      && UnsafeProjection.canSupport(leftKeys)
-      && UnsafeProjection.canSupport(rightKeys)
-      && UnsafeProjection.canSupport(schema))
+    UnsafeProjection.canSupport(leftKeys) &&
+      UnsafeProjection.canSupport(rightKeys) &&
+      UnsafeProjection.canSupport(schema)
   }
 
   override def outputsUnsafeRows: Boolean = isUnsafeMode
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
index 7e854e6702f7..5f1590c46383 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
@@ -90,10 +90,9 @@ case class SortMergeOuterJoin(
   }
 
   private def isUnsafeMode: Boolean = {
-    (codegenEnabled && unsafeEnabled
-      && UnsafeProjection.canSupport(leftKeys)
-      && UnsafeProjection.canSupport(rightKeys)
-      && UnsafeProjection.canSupport(schema))
+    UnsafeProjection.canSupport(leftKeys) &&
+      UnsafeProjection.canSupport(rightKeys) &&
+      UnsafeProjection.canSupport(schema)
   }
 
   override def outputsUnsafeRows: Boolean = isUnsafeMode
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
index b1dc719ca850..aef655727fbb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
@@ -46,10 +46,7 @@ trait HashJoinNode {
   private[this] var joinKeys: Projection = _
 
   protected def isUnsafeMode: Boolean = {
-    (codegenEnabled &&
-      unsafeEnabled &&
-      UnsafeProjection.canSupport(schema) &&
-      UnsafeProjection.canSupport(streamedKeys))
+    UnsafeProjection.canSupport(schema) && UnsafeProjection.canSupport(streamedKeys)
   }
 
   private def streamSideKeyGenerator: Projection = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/LocalNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/LocalNode.scala
index f96b62a67a25..d3381eac91d4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/LocalNode.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/LocalNode.scala
@@ -35,10 +35,6 @@ import org.apache.spark.sql.types.StructType
  */
 abstract class LocalNode(conf: SQLConf) extends QueryPlan[LocalNode] with Logging {
 
-  protected val codegenEnabled: Boolean = conf.codegenEnabled
-
-  protected val unsafeEnabled: Boolean = conf.unsafeEnabled
-
   private[this] lazy val isTesting: Boolean = sys.props.contains("spark.testing")
 
   /**
@@ -111,21 +107,17 @@ abstract class LocalNode(conf: SQLConf) extends QueryPlan[LocalNode] with Loggin
       expressions: Seq[Expression],
       inputSchema: Seq[Attribute]): Projection = {
     log.debug(
-      s"Creating Projection: $expressions, inputSchema: $inputSchema, codegen:$codegenEnabled")
-    if (codegenEnabled) {
-      try {
-        GenerateProjection.generate(expressions, inputSchema)
-      } catch {
-        case NonFatal(e) =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate projection, fallback to interpret", e)
-            new InterpretedProjection(expressions, inputSchema)
-          }
-      }
-    } else {
-      new InterpretedProjection(expressions, inputSchema)
+      s"Creating Projection: $expressions, inputSchema: $inputSchema")
+    try {
+      GenerateProjection.generate(expressions, inputSchema)
+    } catch {
+      case NonFatal(e) =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate projection, fallback to interpret", e)
+          new InterpretedProjection(expressions, inputSchema)
+        }
     }
   }
 
@@ -133,41 +125,33 @@ abstract class LocalNode(conf: SQLConf) extends QueryPlan[LocalNode] with Loggin
       expressions: Seq[Expression],
       inputSchema: Seq[Attribute]): () => MutableProjection = {
     log.debug(
-      s"Creating MutableProj: $expressions, inputSchema: $inputSchema, codegen:$codegenEnabled")
-    if (codegenEnabled) {
-      try {
-        GenerateMutableProjection.generate(expressions, inputSchema)
-      } catch {
-        case NonFatal(e) =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate mutable projection, fallback to interpreted", e)
-            () => new InterpretedMutableProjection(expressions, inputSchema)
-          }
-      }
-    } else {
-      () => new InterpretedMutableProjection(expressions, inputSchema)
+      s"Creating MutableProj: $expressions, inputSchema: $inputSchema")
+    try {
+      GenerateMutableProjection.generate(expressions, inputSchema)
+    } catch {
+      case NonFatal(e) =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate mutable projection, fallback to interpreted", e)
+          () => new InterpretedMutableProjection(expressions, inputSchema)
+        }
     }
   }
 
   protected def newPredicate(
       expression: Expression,
       inputSchema: Seq[Attribute]): (InternalRow) => Boolean = {
-    if (codegenEnabled) {
-      try {
-        GeneratePredicate.generate(expression, inputSchema)
-      } catch {
-        case NonFatal(e) =>
-          if (isTesting) {
-            throw e
-          } else {
-            log.error("Failed to generate predicate, fallback to interpreted", e)
-            InterpretedPredicate.create(expression, inputSchema)
-          }
-      }
-    } else {
-      InterpretedPredicate.create(expression, inputSchema)
+    try {
+      GeneratePredicate.generate(expression, inputSchema)
+    } catch {
+      case NonFatal(e) =>
+        if (isTesting) {
+          throw e
+        } else {
+          log.error("Failed to generate predicate, fallback to interpreted", e)
+          InterpretedPredicate.create(expression, inputSchema)
+        }
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 5b8841bc154a..48de693a999d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -423,8 +423,6 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
 
   private val hadoopConf = new Configuration(sqlContext.sparkContext.hadoopConfiguration)
 
-  private val codegenEnabled = sqlContext.conf.codegenEnabled
-
   private var _partitionSpec: PartitionSpec = _
 
   private class FileStatusCache {
@@ -661,7 +659,6 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
   def buildScan(requiredColumns: Array[String], inputFiles: Array[FileStatus]): RDD[Row] = {
     // Yeah, to workaround serialization...
     val dataSchema = this.dataSchema
-    val codegenEnabled = this.codegenEnabled
     val needConversion = this.needConversion
 
     val requiredOutput = requiredColumns.map { col =>
@@ -678,11 +675,8 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
       }
 
     converted.mapPartitions { rows =>
-      val buildProjection = if (codegenEnabled) {
+      val buildProjection =
         GenerateMutableProjection.generate(requiredOutput, dataSchema.toAttributes)
-      } else {
-        () => new InterpretedMutableProjection(requiredOutput, dataSchema.toAttributes)
-      }
 
       val projectedRows = {
         val mutableProjection = buildProjection()
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index f3a7aa280367..e4f23fe17b75 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -621,11 +621,7 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
   }
 
   test("SPARK-6899: type should match when using codegen") {
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-      checkAnswer(
-        decimalData.agg(avg('a)),
-        Row(new java.math.BigDecimal(2.0)))
-    }
+    checkAnswer(decimalData.agg(avg('a)), Row(new java.math.BigDecimal(2.0)))
   }
 
   test("SPARK-7133: Implement struct, array, and map field accessor") {
@@ -844,31 +840,16 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
   }
 
   test("SPARK-8608: call `show` on local DataFrame with random columns should return same value") {
-    // Make sure we can pass this test for both codegen mode and interpreted mode.
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-      val df = testData.select(rand(33))
-      assert(df.showString(5) == df.showString(5))
-    }
-
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "false") {
-      val df = testData.select(rand(33))
-      assert(df.showString(5) == df.showString(5))
-    }
+    val df = testData.select(rand(33))
+    assert(df.showString(5) == df.showString(5))
 
     // We will reuse the same Expression object for LocalRelation.
-    val df = (1 to 10).map(Tuple1.apply).toDF().select(rand(33))
-    assert(df.showString(5) == df.showString(5))
+    val df1 = (1 to 10).map(Tuple1.apply).toDF().select(rand(33))
+    assert(df1.showString(5) == df1.showString(5))
   }
 
   test("SPARK-8609: local DataFrame with random columns should return same value after sort") {
-    // Make sure we can pass this test for both codegen mode and interpreted mode.
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-      checkAnswer(testData.sort(rand(33)), testData.sort(rand(33)))
-    }
-
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "false") {
-      checkAnswer(testData.sort(rand(33)), testData.sort(rand(33)))
-    }
+    checkAnswer(testData.sort(rand(33)), testData.sort(rand(33)))
 
     // We will reuse the same Expression object for LocalRelation.
     val df = (1 to 10).map(Tuple1.apply).toDF()
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameTungstenSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameTungstenSuite.scala
index 7ae12a7895f7..68e99d6a6b81 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameTungstenSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameTungstenSuite.scala
@@ -31,52 +31,46 @@ class DataFrameTungstenSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
 
   test("test simple types") {
-    withSQLConf(SQLConf.UNSAFE_ENABLED.key -> "true") {
-      val df = sparkContext.parallelize(Seq((1, 2))).toDF("a", "b")
-      assert(df.select(struct("a", "b")).first().getStruct(0) === Row(1, 2))
-    }
+    val df = sparkContext.parallelize(Seq((1, 2))).toDF("a", "b")
+    assert(df.select(struct("a", "b")).first().getStruct(0) === Row(1, 2))
   }
 
   test("test struct type") {
-    withSQLConf(SQLConf.UNSAFE_ENABLED.key -> "true") {
-      val struct = Row(1, 2L, 3.0F, 3.0)
-      val data = sparkContext.parallelize(Seq(Row(1, struct)))
+    val struct = Row(1, 2L, 3.0F, 3.0)
+    val data = sparkContext.parallelize(Seq(Row(1, struct)))
 
-      val schema = new StructType()
-        .add("a", IntegerType)
-        .add("b",
-          new StructType()
-            .add("b1", IntegerType)
-            .add("b2", LongType)
-            .add("b3", FloatType)
-            .add("b4", DoubleType))
+    val schema = new StructType()
+      .add("a", IntegerType)
+      .add("b",
+        new StructType()
+          .add("b1", IntegerType)
+          .add("b2", LongType)
+          .add("b3", FloatType)
+          .add("b4", DoubleType))
 
-      val df = sqlContext.createDataFrame(data, schema)
-      assert(df.select("b").first() === Row(struct))
-    }
+    val df = sqlContext.createDataFrame(data, schema)
+    assert(df.select("b").first() === Row(struct))
   }
 
   test("test nested struct type") {
-    withSQLConf(SQLConf.UNSAFE_ENABLED.key -> "true") {
-      val innerStruct = Row(1, "abcd")
-      val outerStruct = Row(1, 2L, 3.0F, 3.0, innerStruct, "efg")
-      val data = sparkContext.parallelize(Seq(Row(1, outerStruct)))
+    val innerStruct = Row(1, "abcd")
+    val outerStruct = Row(1, 2L, 3.0F, 3.0, innerStruct, "efg")
+    val data = sparkContext.parallelize(Seq(Row(1, outerStruct)))
 
-      val schema = new StructType()
-        .add("a", IntegerType)
-        .add("b",
-          new StructType()
-            .add("b1", IntegerType)
-            .add("b2", LongType)
-            .add("b3", FloatType)
-            .add("b4", DoubleType)
-            .add("b5", new StructType()
-            .add("b5a", IntegerType)
-            .add("b5b", StringType))
-            .add("b6", StringType))
+    val schema = new StructType()
+      .add("a", IntegerType)
+      .add("b",
+        new StructType()
+          .add("b1", IntegerType)
+          .add("b2", LongType)
+          .add("b3", FloatType)
+          .add("b4", DoubleType)
+          .add("b5", new StructType()
+          .add("b5a", IntegerType)
+          .add("b5b", StringType))
+          .add("b6", StringType))
 
-      val df = sqlContext.createDataFrame(data, schema)
-      assert(df.select("b").first() === Row(outerStruct))
-    }
+    val df = sqlContext.createDataFrame(data, schema)
+    assert(df.select("b").first() === Row(outerStruct))
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 19e850a46fdf..acabe32c67bc 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -261,8 +261,6 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   }
 
   test("aggregation with codegen") {
-    val originalValue = sqlContext.conf.codegenEnabled
-    sqlContext.setConf(SQLConf.CODEGEN_ENABLED, true)
     // Prepare a table that we can group some rows.
     sqlContext.table("testData")
       .unionAll(sqlContext.table("testData"))
@@ -347,7 +345,6 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         Row(null, null, null, 0) :: Nil)
     } finally {
       sqlContext.dropTempTable("testData3x")
-      sqlContext.setConf(SQLConf.CODEGEN_ENABLED, originalValue)
     }
   }
 
@@ -567,12 +564,6 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     sortTest()
   }
 
-  test("SPARK-6927 external sorting with codegen on") {
-    withSQLConf(SQLConf.CODEGEN_ENABLED.key -> "true") {
-      sortTest()
-    }
-  }
-
   test("limit") {
     checkAnswer(
       sql("SELECT * FROM testData LIMIT 10"),
@@ -1624,12 +1615,10 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
   }
 
   test("aggregation with codegen updates peak execution memory") {
-    withSQLConf((SQLConf.CODEGEN_ENABLED.key, "true")) {
-      AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "aggregation with codegen") {
-        testCodeGen(
-          "SELECT key, count(value) FROM testData GROUP BY key",
-          (1 to 100).map(i => Row(i, 1)))
-      }
+    AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "aggregation with codegen") {
+      testCodeGen(
+        "SELECT key, count(value) FROM testData GROUP BY key",
+        (1 to 100).map(i => Row(i, 1)))
     }
   }
 
@@ -1783,9 +1772,7 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     // This bug will be triggered when Tungsten is enabled and there are multiple
     // SortMergeJoin operators executed in the same task.
     val confs =
-      SQLConf.SORTMERGE_JOIN.key -> "true" ::
-        SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "1" ::
-        SQLConf.TUNGSTEN_ENABLED.key -> "true" :: Nil
+      SQLConf.SORTMERGE_JOIN.key -> "true" :: SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "1" :: Nil
     withSQLConf(confs: _*) {
       val df1 = (1 to 50).map(i => (s"str_$i", i)).toDF("i", "j")
       val df2 =
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
index 7a0f0dfd2b7f..85486c08894c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
@@ -31,19 +31,6 @@ import org.apache.spark.sql.types._
 class TungstenSortSuite extends SparkPlanTest with SharedSQLContext {
   import testImplicits.localSeqToDataFrameHolder
 
-  override def beforeAll(): Unit = {
-    super.beforeAll()
-    sqlContext.conf.setConf(SQLConf.CODEGEN_ENABLED, true)
-  }
-
-  override def afterAll(): Unit = {
-    try {
-      sqlContext.conf.unsetConf(SQLConf.CODEGEN_ENABLED)
-    } finally {
-      super.afterAll()
-    }
-  }
-
   test("sort followed by limit") {
     checkThatPlansAgree(
       (1 to 100).map(v => Tuple1(v)).toDF("a"),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/BroadcastJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/BroadcastJoinSuite.scala
index dcbfdca71acb..5b2998c3c76d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/BroadcastJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/BroadcastJoinSuite.scala
@@ -26,7 +26,7 @@ import org.apache.spark.sql.functions._
 import org.apache.spark.sql.{SQLConf, SQLContext, QueryTest}
 
 /**
- * Test various broadcast join operators with unsafe enabled.
+ * Test various broadcast join operators.
  *
  * Tests in this suite we need to run Spark in local-cluster mode. In particular, the use of
  * unsafe map in [[org.apache.spark.sql.execution.joins.UnsafeHashedRelation]] is not triggered
@@ -45,8 +45,6 @@ class BroadcastJoinSuite extends QueryTest with BeforeAndAfterAll {
       .setAppName("testing")
     val sc = new SparkContext(conf)
     sqlContext = new SQLContext(sc)
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED, true)
-    sqlContext.setConf(SQLConf.CODEGEN_ENABLED, true)
   }
 
   override def afterAll(): Unit = {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
index 8c2e78b2a9db..44b0d9d4102a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
@@ -28,12 +28,9 @@ import org.apache.spark.sql.execution.joins.{HashedRelation, BuildLeft, BuildRig
 class HashJoinNodeSuite extends LocalNodeTest {
 
   // Test all combinations of the two dimensions: with/out unsafe and build sides
-  private val maybeUnsafeAndCodegen = Seq(false, true)
   private val buildSides = Seq(BuildLeft, BuildRight)
-  maybeUnsafeAndCodegen.foreach { unsafeAndCodegen =>
-    buildSides.foreach { buildSide =>
-      testJoin(unsafeAndCodegen, buildSide)
-    }
+  buildSides.foreach { buildSide =>
+    testJoin(buildSide)
   }
 
   /**
@@ -45,10 +42,7 @@ class HashJoinNodeSuite extends LocalNodeTest {
       buildKeys: Seq[Expression],
       buildNode: LocalNode): HashedRelation = {
 
-    val isUnsafeMode =
-      conf.codegenEnabled &&
-        conf.unsafeEnabled &&
-        UnsafeProjection.canSupport(buildKeys)
+    val isUnsafeMode = UnsafeProjection.canSupport(buildKeys)
 
     val buildSideKeyGenerator =
       if (isUnsafeMode) {
@@ -68,15 +62,10 @@ class HashJoinNodeSuite extends LocalNodeTest {
   /**
    * Test inner hash join with varying degrees of matches.
    */
-  private def testJoin(
-      unsafeAndCodegen: Boolean,
-      buildSide: BuildSide): Unit = {
-    val simpleOrUnsafe = if (!unsafeAndCodegen) "simple" else "unsafe"
-    val testNamePrefix = s"$simpleOrUnsafe / $buildSide"
+  private def testJoin(buildSide: BuildSide): Unit = {
+    val testNamePrefix = buildSide
     val someData = (1 to 100).map { i => (i, "burger" + i) }.toArray
     val conf = new SQLConf
-    conf.setConf(SQLConf.UNSAFE_ENABLED, unsafeAndCodegen)
-    conf.setConf(SQLConf.CODEGEN_ENABLED, unsafeAndCodegen)
 
     // Actual test body
     def runTest(leftInput: Array[(Int, String)], rightInput: Array[(Int, String)]): Unit = {
@@ -119,7 +108,7 @@ class HashJoinNodeSuite extends LocalNodeTest {
         .map { case (k, v) => (k, v, k, rightInputMap(k)) }
 
       Seq(makeBinaryHashJoinNode, makeBroadcastJoinNode).foreach { makeNode =>
-        val makeUnsafeNode = if (unsafeAndCodegen) wrapForUnsafe(makeNode) else makeNode
+        val makeUnsafeNode = wrapForUnsafe(makeNode)
         val hashJoinNode = makeUnsafeNode(leftNode, rightNode)
 
         val actualOutput = hashJoinNode.collect().map { row =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
index 40299d9d5ee3..252f7cc8971f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
@@ -26,30 +26,21 @@ import org.apache.spark.sql.execution.joins.{BuildLeft, BuildRight, BuildSide}
 class NestedLoopJoinNodeSuite extends LocalNodeTest {
 
   // Test all combinations of the three dimensions: with/out unsafe, build sides, and join types
-  private val maybeUnsafeAndCodegen = Seq(false, true)
   private val buildSides = Seq(BuildLeft, BuildRight)
   private val joinTypes = Seq(LeftOuter, RightOuter, FullOuter)
-  maybeUnsafeAndCodegen.foreach { unsafeAndCodegen =>
-    buildSides.foreach { buildSide =>
-      joinTypes.foreach { joinType =>
-        testJoin(unsafeAndCodegen, buildSide, joinType)
-      }
+  buildSides.foreach { buildSide =>
+    joinTypes.foreach { joinType =>
+      testJoin(buildSide, joinType)
     }
   }
 
   /**
    * Test outer nested loop joins with varying degrees of matches.
    */
-  private def testJoin(
-      unsafeAndCodegen: Boolean,
-      buildSide: BuildSide,
-      joinType: JoinType): Unit = {
-    val simpleOrUnsafe = if (!unsafeAndCodegen) "simple" else "unsafe"
-    val testNamePrefix = s"$simpleOrUnsafe / $buildSide / $joinType"
+  private def testJoin(buildSide: BuildSide, joinType: JoinType): Unit = {
+    val testNamePrefix = s"$buildSide / $joinType"
     val someData = (1 to 100).map { i => (i, "burger" + i) }.toArray
     val conf = new SQLConf
-    conf.setConf(SQLConf.UNSAFE_ENABLED, unsafeAndCodegen)
-    conf.setConf(SQLConf.CODEGEN_ENABLED, unsafeAndCodegen)
 
     // Actual test body
     def runTest(
@@ -63,7 +54,7 @@ class NestedLoopJoinNodeSuite extends LocalNodeTest {
         resolveExpressions(
           new NestedLoopJoinNode(conf, node1, node2, buildSide, joinType, Some(cond)))
       }
-      val makeUnsafeNode = if (unsafeAndCodegen) wrapForUnsafe(makeNode) else makeNode
+      val makeUnsafeNode = wrapForUnsafe(makeNode)
       val hashJoinNode = makeUnsafeNode(leftNode, rightNode)
       val expectedOutput = generateExpectedOutput(leftInput, rightInput, joinType)
       val actualOutput = hashJoinNode.collect().map { row =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index 97162249d995..544c1ef303ae 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -110,33 +110,23 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("Project metrics") {
-    withSQLConf(
-      SQLConf.UNSAFE_ENABLED.key -> "false",
-      SQLConf.CODEGEN_ENABLED.key -> "false",
-      SQLConf.TUNGSTEN_ENABLED.key -> "false") {
-      // Assume the execution plan is
-      // PhysicalRDD(nodeId = 1) -> Project(nodeId = 0)
-      val df = person.select('name)
-      testSparkPlanMetrics(df, 1, Map(
-        0L ->("Project", Map(
-          "number of rows" -> 2L)))
-      )
-    }
+    // Assume the execution plan is
+    // PhysicalRDD(nodeId = 1) -> Project(nodeId = 0)
+    val df = person.select('name)
+    testSparkPlanMetrics(df, 1, Map(
+      0L ->("TungstenProject", Map(
+        "number of rows" -> 2L)))
+    )
   }
 
   test("TungstenProject metrics") {
-    withSQLConf(
-      SQLConf.UNSAFE_ENABLED.key -> "true",
-      SQLConf.CODEGEN_ENABLED.key -> "true",
-      SQLConf.TUNGSTEN_ENABLED.key -> "true") {
-      // Assume the execution plan is
-      // PhysicalRDD(nodeId = 1) -> TungstenProject(nodeId = 0)
-      val df = person.select('name)
-      testSparkPlanMetrics(df, 1, Map(
-        0L ->("TungstenProject", Map(
-          "number of rows" -> 2L)))
-      )
-    }
+    // Assume the execution plan is
+    // PhysicalRDD(nodeId = 1) -> TungstenProject(nodeId = 0)
+    val df = person.select('name)
+    testSparkPlanMetrics(df, 1, Map(
+      0L ->("TungstenProject", Map(
+        "number of rows" -> 2L)))
+    )
   }
 
   test("Filter metrics") {
@@ -150,71 +140,30 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
     )
   }
 
-  test("SortBasedAggregate metrics") {
-    // Because SortBasedAggregate may skip different rows if the number of partitions is different,
-    // this test should use the deterministic number of partitions.
-    withSQLConf(
-      SQLConf.UNSAFE_ENABLED.key -> "false",
-      SQLConf.CODEGEN_ENABLED.key -> "true",
-      SQLConf.TUNGSTEN_ENABLED.key -> "true") {
-      // Assume the execution plan is
-      // ... -> SortBasedAggregate(nodeId = 2) -> TungstenExchange(nodeId = 1) ->
-      // SortBasedAggregate(nodeId = 0)
-      val df = testData2.groupBy().count() // 2 partitions
-      testSparkPlanMetrics(df, 1, Map(
-        2L -> ("SortBasedAggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 2L)),
-        0L -> ("SortBasedAggregate", Map(
-          "number of input rows" -> 2L,
-          "number of output rows" -> 1L)))
-      )
-
-      // Assume the execution plan is
-      // ... -> SortBasedAggregate(nodeId = 3) -> TungstenExchange(nodeId = 2)
-      // -> ExternalSort(nodeId = 1)-> SortBasedAggregate(nodeId = 0)
-      // 2 partitions and each partition contains 2 keys
-      val df2 = testData2.groupBy('a).count()
-      testSparkPlanMetrics(df2, 1, Map(
-        3L -> ("SortBasedAggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 4L)),
-        0L -> ("SortBasedAggregate", Map(
-          "number of input rows" -> 4L,
-          "number of output rows" -> 3L)))
-      )
-    }
-  }
-
   test("TungstenAggregate metrics") {
-    withSQLConf(
-      SQLConf.UNSAFE_ENABLED.key -> "true",
-      SQLConf.CODEGEN_ENABLED.key -> "true",
-      SQLConf.TUNGSTEN_ENABLED.key -> "true") {
-      // Assume the execution plan is
-      // ... -> TungstenAggregate(nodeId = 2) -> Exchange(nodeId = 1)
-      // -> TungstenAggregate(nodeId = 0)
-      val df = testData2.groupBy().count() // 2 partitions
-      testSparkPlanMetrics(df, 1, Map(
-        2L -> ("TungstenAggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 2L)),
-        0L -> ("TungstenAggregate", Map(
-          "number of input rows" -> 2L,
-          "number of output rows" -> 1L)))
-      )
+    // Assume the execution plan is
+    // ... -> TungstenAggregate(nodeId = 2) -> Exchange(nodeId = 1)
+    // -> TungstenAggregate(nodeId = 0)
+    val df = testData2.groupBy().count() // 2 partitions
+    testSparkPlanMetrics(df, 1, Map(
+      2L -> ("TungstenAggregate", Map(
+        "number of input rows" -> 6L,
+        "number of output rows" -> 2L)),
+      0L -> ("TungstenAggregate", Map(
+        "number of input rows" -> 2L,
+        "number of output rows" -> 1L)))
+    )
 
-      // 2 partitions and each partition contains 2 keys
-      val df2 = testData2.groupBy('a).count()
-      testSparkPlanMetrics(df2, 1, Map(
-        2L -> ("TungstenAggregate", Map(
-          "number of input rows" -> 6L,
-          "number of output rows" -> 4L)),
-        0L -> ("TungstenAggregate", Map(
-          "number of input rows" -> 4L,
-          "number of output rows" -> 3L)))
-      )
-    }
+    // 2 partitions and each partition contains 2 keys
+    val df2 = testData2.groupBy('a).count()
+    testSparkPlanMetrics(df2, 1, Map(
+      2L -> ("TungstenAggregate", Map(
+        "number of input rows" -> 6L,
+        "number of output rows" -> 4L)),
+      0L -> ("TungstenAggregate", Map(
+        "number of input rows" -> 4L,
+        "number of output rows" -> 3L)))
+    )
   }
 
   test("SortMergeJoin metrics") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 22d2aefd699b..61e3e913c23e 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -808,54 +808,12 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
   }
 }
 
-class SortBasedAggregationQuerySuite extends AggregationQuerySuite {
 
-  var originalUnsafeEnabled: Boolean = _
+class TungstenAggregationQuerySuite extends AggregationQuerySuite
 
-  override def beforeAll(): Unit = {
-    originalUnsafeEnabled = sqlContext.conf.unsafeEnabled
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, "false")
-    super.beforeAll()
-  }
-
-  override def afterAll(): Unit = {
-    super.afterAll()
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, originalUnsafeEnabled.toString)
-  }
-}
-
-class TungstenAggregationQuerySuite extends AggregationQuerySuite {
-
-  var originalUnsafeEnabled: Boolean = _
-
-  override def beforeAll(): Unit = {
-    originalUnsafeEnabled = sqlContext.conf.unsafeEnabled
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, "true")
-    super.beforeAll()
-  }
-
-  override def afterAll(): Unit = {
-    super.afterAll()
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, originalUnsafeEnabled.toString)
-  }
-}
 
 class TungstenAggregationQueryWithControlledFallbackSuite extends AggregationQuerySuite {
 
-  var originalUnsafeEnabled: Boolean = _
-
-  override def beforeAll(): Unit = {
-    originalUnsafeEnabled = sqlContext.conf.unsafeEnabled
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, "true")
-    super.beforeAll()
-  }
-
-  override def afterAll(): Unit = {
-    super.afterAll()
-    sqlContext.setConf(SQLConf.UNSAFE_ENABLED.key, originalUnsafeEnabled.toString)
-    sqlContext.conf.unsetConf("spark.sql.TungstenAggregate.testFallbackStartsAt")
-  }
-
   override protected def checkAnswer(actual: => DataFrame, expectedAnswer: Seq[Row]): Unit = {
     (0 to 2).foreach { fallbackStartsAt =>
       sqlContext.setConf(
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveExplainSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveExplainSuite.scala
index 94162da4eae1..a7b7ad009391 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveExplainSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveExplainSuite.scala
@@ -37,8 +37,7 @@ class HiveExplainSuite extends QueryTest with SQLTestUtils with TestHiveSingleto
                    "== Parsed Logical Plan ==",
                    "== Analyzed Logical Plan ==",
                    "== Optimized Logical Plan ==",
-                   "== Physical Plan ==",
-                   "Code Generation")
+                   "== Physical Plan ==")
   }
 
   test("explain create table command") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
index 5f9a447759b4..5ab477efc4ee 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
@@ -28,11 +28,11 @@ import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectIn
 import org.apache.hadoop.hive.serde2.objectinspector.{ObjectInspector, ObjectInspectorFactory}
 import org.apache.hadoop.hive.serde2.{AbstractSerDe, SerDeStats}
 import org.apache.hadoop.io.Writable
-import org.apache.spark.sql.{AnalysisException, QueryTest, Row, SQLConf}
+import org.apache.spark.sql.{AnalysisException, QueryTest, Row}
 import org.apache.spark.sql.hive.test.TestHiveSingleton
-
 import org.apache.spark.util.Utils
 
+
 case class Fields(f1: Int, f2: Int, f3: Int, f4: Int, f5: Int)
 
 // Case classes for the custom UDF's.
@@ -92,44 +92,36 @@ class HiveUDFSuite extends QueryTest with TestHiveSingleton {
   }
 
   test("Max/Min on named_struct") {
-    def testOrderInStruct(): Unit = {
-      checkAnswer(sql(
-        """
-          |SELECT max(named_struct(
-          |           "key", key,
-          |           "value", value)).value FROM src
-        """.stripMargin), Seq(Row("val_498")))
-      checkAnswer(sql(
-        """
-          |SELECT min(named_struct(
-          |           "key", key,
-          |           "value", value)).value FROM src
-        """.stripMargin), Seq(Row("val_0")))
-
-      // nested struct cases
-      checkAnswer(sql(
-        """
-          |SELECT max(named_struct(
-          |           "key", named_struct(
-                              "key", key,
-                              "value", value),
-          |           "value", value)).value FROM src
-        """.stripMargin), Seq(Row("val_498")))
-      checkAnswer(sql(
-        """
-          |SELECT min(named_struct(
-          |           "key", named_struct(
-                             "key", key,
-                             "value", value),
-          |           "value", value)).value FROM src
-        """.stripMargin), Seq(Row("val_0")))
-    }
-    val codegenDefault = hiveContext.getConf(SQLConf.CODEGEN_ENABLED)
-    hiveContext.setConf(SQLConf.CODEGEN_ENABLED, true)
-    testOrderInStruct()
-    hiveContext.setConf(SQLConf.CODEGEN_ENABLED, false)
-    testOrderInStruct()
-    hiveContext.setConf(SQLConf.CODEGEN_ENABLED, codegenDefault)
+    checkAnswer(sql(
+      """
+        |SELECT max(named_struct(
+        |           "key", key,
+        |           "value", value)).value FROM src
+      """.stripMargin), Seq(Row("val_498")))
+    checkAnswer(sql(
+      """
+        |SELECT min(named_struct(
+        |           "key", key,
+        |           "value", value)).value FROM src
+      """.stripMargin), Seq(Row("val_0")))
+
+    // nested struct cases
+    checkAnswer(sql(
+      """
+        |SELECT max(named_struct(
+        |           "key", named_struct(
+                            "key", key,
+                            "value", value),
+        |           "value", value)).value FROM src
+      """.stripMargin), Seq(Row("val_498")))
+    checkAnswer(sql(
+      """
+        |SELECT min(named_struct(
+        |           "key", named_struct(
+                           "key", key,
+                           "value", value),
+        |           "value", value)).value FROM src
+      """.stripMargin), Seq(Row("val_0")))
   }
 
   test("SPARK-6409 UDAF Average test") {

From a9a6b80c718008aac7c411dfe46355efe58dee2e Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 11 Nov 2015 12:48:51 -0800
Subject: [PATCH 635/896] [SPARK-11645][SQL] Remove OpenHashSet for the old
 aggregate.

Author: Reynold Xin <rxin@databricks.com>

Closes #9621 from rxin/SPARK-11645.
---
 .../expressions/codegen/CodeGenerator.scala   |   6 -
 .../codegen/GenerateUnsafeProjection.scala    |   7 +-
 .../spark/sql/catalyst/expressions/sets.scala | 194 ------------------
 .../sql/execution/SparkSqlSerializer.scala    | 103 +---------
 .../spark/sql/UserDefinedTypeSuite.scala      |  11 -
 5 files changed, 5 insertions(+), 316 deletions(-)
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 5a4bba232b04..ccd91d3549b5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -33,10 +33,6 @@ import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.types._
 
 
-// These classes are here to avoid issues with serialization and integration with quasiquotes.
-class IntegerHashSet extends org.apache.spark.util.collection.OpenHashSet[Int]
-class LongHashSet extends org.apache.spark.util.collection.OpenHashSet[Long]
-
 /**
  * Java source for evaluating an [[Expression]] given a [[InternalRow]] of input.
  *
@@ -205,8 +201,6 @@ class CodeGenContext {
     case _: StructType => "InternalRow"
     case _: ArrayType => "ArrayData"
     case _: MapType => "MapData"
-    case dt: OpenHashSetUDT if dt.elementType == IntegerType => classOf[IntegerHashSet].getName
-    case dt: OpenHashSetUDT if dt.elementType == LongType => classOf[LongHashSet].getName
     case udt: UserDefinedType[_] => javaType(udt.sqlType)
     case ObjectType(cls) if cls.isArray => s"${javaType(ObjectType(cls.getComponentType))}[]"
     case ObjectType(cls) => cls.getName
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 9ef226141421..4c17d02a2372 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -39,7 +39,6 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     case t: StructType => t.toSeq.forall(field => canSupport(field.dataType))
     case t: ArrayType if canSupport(t.elementType) => true
     case MapType(kt, vt, _) if canSupport(kt) && canSupport(vt) => true
-    case dt: OpenHashSetUDT => false  // it's not a standard UDT
     case udt: UserDefinedType[_] => canSupport(udt.sqlType)
     case _ => false
   }
@@ -309,13 +308,13 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     in.map(BindReferences.bindReference(_, inputSchema))
 
   def generate(
-    expressions: Seq[Expression],
-    subexpressionEliminationEnabled: Boolean): UnsafeProjection = {
+      expressions: Seq[Expression],
+      subexpressionEliminationEnabled: Boolean): UnsafeProjection = {
     create(canonicalize(expressions), subexpressionEliminationEnabled)
   }
 
   protected def create(expressions: Seq[Expression]): UnsafeProjection = {
-    create(expressions, false)
+    create(expressions, subexpressionEliminationEnabled = false)
   }
 
   private def create(
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala
deleted file mode 100644
index d124d29d534b..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/sets.scala
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.expressions
-
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.codegen._
-import org.apache.spark.sql.types._
-import org.apache.spark.util.collection.OpenHashSet
-
-/** The data type for expressions returning an OpenHashSet as the result. */
-private[sql] class OpenHashSetUDT(
-    val elementType: DataType) extends UserDefinedType[OpenHashSet[Any]] {
-
-  override def sqlType: DataType = ArrayType(elementType)
-
-  /** Since we are using OpenHashSet internally, usually it will not be called. */
-  override def serialize(obj: Any): Seq[Any] = {
-    obj.asInstanceOf[OpenHashSet[Any]].iterator.toSeq
-  }
-
-  /** Since we are using OpenHashSet internally, usually it will not be called. */
-  override def deserialize(datum: Any): OpenHashSet[Any] = {
-    val iterator = datum.asInstanceOf[Seq[Any]].iterator
-    val set = new OpenHashSet[Any]
-    while(iterator.hasNext) {
-      set.add(iterator.next())
-    }
-
-    set
-  }
-
-  override def userClass: Class[OpenHashSet[Any]] = classOf[OpenHashSet[Any]]
-
-  private[spark] override def asNullable: OpenHashSetUDT = this
-}
-
-/**
- * Creates a new set of the specified type
- */
-case class NewSet(elementType: DataType) extends LeafExpression with CodegenFallback {
-
-  override def nullable: Boolean = false
-
-  override def dataType: OpenHashSetUDT = new OpenHashSetUDT(elementType)
-
-  override def eval(input: InternalRow): Any = {
-    new OpenHashSet[Any]()
-  }
-
-  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    elementType match {
-      case IntegerType | LongType =>
-        ev.isNull = "false"
-        s"""
-          ${ctx.javaType(dataType)} ${ev.value} = new ${ctx.javaType(dataType)}();
-        """
-      case _ => super.genCode(ctx, ev)
-    }
-  }
-
-  override def toString: String = s"new Set($dataType)"
-}
-
-/**
- * Adds an item to a set.
- * For performance, this expression mutates its input during evaluation.
- * Note: this expression is internal and created only by the GeneratedAggregate,
- * we don't need to do type check for it.
- */
-case class AddItemToSet(item: Expression, set: Expression)
-  extends Expression with CodegenFallback {
-
-  override def children: Seq[Expression] = item :: set :: Nil
-
-  override def nullable: Boolean = set.nullable
-
-  override def dataType: DataType = set.dataType
-
-  override def eval(input: InternalRow): Any = {
-    val itemEval = item.eval(input)
-    val setEval = set.eval(input).asInstanceOf[OpenHashSet[Any]]
-
-    if (itemEval != null) {
-      if (setEval != null) {
-        setEval.add(itemEval)
-        setEval
-      } else {
-        null
-      }
-    } else {
-      setEval
-    }
-  }
-
-  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val elementType = set.dataType.asInstanceOf[OpenHashSetUDT].elementType
-    elementType match {
-      case IntegerType | LongType =>
-        val itemEval = item.gen(ctx)
-        val setEval = set.gen(ctx)
-        val htype = ctx.javaType(dataType)
-
-        ev.isNull = "false"
-        ev.value = setEval.value
-        itemEval.code + setEval.code +  s"""
-          if (!${itemEval.isNull} && !${setEval.isNull}) {
-           (($htype)${setEval.value}).add(${itemEval.value});
-          }
-         """
-      case _ => super.genCode(ctx, ev)
-    }
-  }
-
-  override def toString: String = s"$set += $item"
-}
-
-/**
- * Combines the elements of two sets.
- * For performance, this expression mutates its left input set during evaluation.
- * Note: this expression is internal and created only by the GeneratedAggregate,
- * we don't need to do type check for it.
- */
-case class CombineSets(left: Expression, right: Expression)
-  extends BinaryExpression with CodegenFallback {
-
-  override def nullable: Boolean = left.nullable
-  override def dataType: DataType = left.dataType
-
-  override def eval(input: InternalRow): Any = {
-    val leftEval = left.eval(input).asInstanceOf[OpenHashSet[Any]]
-    if(leftEval != null) {
-      val rightEval = right.eval(input).asInstanceOf[OpenHashSet[Any]]
-      if (rightEval != null) {
-        val iterator = rightEval.iterator
-        while(iterator.hasNext) {
-          val rightValue = iterator.next()
-          leftEval.add(rightValue)
-        }
-      }
-      leftEval
-    } else {
-      null
-    }
-  }
-
-  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val elementType = left.dataType.asInstanceOf[OpenHashSetUDT].elementType
-    elementType match {
-      case IntegerType | LongType =>
-        val leftEval = left.gen(ctx)
-        val rightEval = right.gen(ctx)
-        val htype = ctx.javaType(dataType)
-
-        ev.isNull = leftEval.isNull
-        ev.value = leftEval.value
-        leftEval.code + rightEval.code + s"""
-          if (!${leftEval.isNull} && !${rightEval.isNull}) {
-            ${leftEval.value}.union((${htype})${rightEval.value});
-          }
-        """
-      case _ => super.genCode(ctx, ev)
-    }
-  }
-}
-
-/**
- * Returns the number of elements in the input set.
- * Note: this expression is internal and created only by the GeneratedAggregate,
- * we don't need to do type check for it.
- */
-case class CountSet(child: Expression) extends UnaryExpression with CodegenFallback {
-
-  override def dataType: DataType = LongType
-
-  protected override def nullSafeEval(input: Any): Any =
-    input.asInstanceOf[OpenHashSet[Any]].size.toLong
-
-  override def toString: String = s"$child.count()"
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlSerializer.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlSerializer.scala
index b19ad4f1c563..8317f648ccb4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlSerializer.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlSerializer.scala
@@ -22,19 +22,16 @@ import java.util.{HashMap => JavaHashMap}
 
 import scala.reflect.ClassTag
 
-import com.clearspring.analytics.stream.cardinality.HyperLogLog
 import com.esotericsoftware.kryo.io.{Input, Output}
 import com.esotericsoftware.kryo.{Kryo, Serializer}
 import com.twitter.chill.ResourcePool
 
 import org.apache.spark.serializer.{KryoSerializer, SerializerInstance}
-import org.apache.spark.sql.catalyst.expressions.GenericInternalRow
-import org.apache.spark.sql.catalyst.expressions.codegen.{IntegerHashSet, LongHashSet}
 import org.apache.spark.sql.types.Decimal
 import org.apache.spark.util.MutablePair
-import org.apache.spark.util.collection.OpenHashSet
 import org.apache.spark.{SparkConf, SparkEnv}
 
+
 private[sql] class SparkSqlSerializer(conf: SparkConf) extends KryoSerializer(conf) {
   override def newKryo(): Kryo = {
     val kryo = super.newKryo()
@@ -43,16 +40,9 @@ private[sql] class SparkSqlSerializer(conf: SparkConf) extends KryoSerializer(co
     kryo.register(classOf[org.apache.spark.sql.catalyst.expressions.GenericRow])
     kryo.register(classOf[org.apache.spark.sql.catalyst.expressions.GenericInternalRow])
     kryo.register(classOf[org.apache.spark.sql.catalyst.expressions.GenericMutableRow])
-    kryo.register(classOf[com.clearspring.analytics.stream.cardinality.HyperLogLog],
-                  new HyperLogLogSerializer)
     kryo.register(classOf[java.math.BigDecimal], new JavaBigDecimalSerializer)
     kryo.register(classOf[BigDecimal], new ScalaBigDecimalSerializer)
 
-    // Specific hashsets must come first TODO: Move to core.
-    kryo.register(classOf[IntegerHashSet], new IntegerHashSetSerializer)
-    kryo.register(classOf[LongHashSet], new LongHashSetSerializer)
-    kryo.register(classOf[org.apache.spark.util.collection.OpenHashSet[_]],
-                  new OpenHashSetSerializer)
     kryo.register(classOf[Decimal])
     kryo.register(classOf[JavaHashMap[_, _]])
 
@@ -62,7 +52,7 @@ private[sql] class SparkSqlSerializer(conf: SparkConf) extends KryoSerializer(co
 }
 
 private[execution] class KryoResourcePool(size: Int)
-    extends ResourcePool[SerializerInstance](size) {
+  extends ResourcePool[SerializerInstance](size) {
 
   val ser: SparkSqlSerializer = {
     val sparkConf = Option(SparkEnv.get).map(_.conf).getOrElse(new SparkConf())
@@ -116,92 +106,3 @@ private[sql] class ScalaBigDecimalSerializer extends Serializer[BigDecimal] {
     new java.math.BigDecimal(input.readString())
   }
 }
-
-private[sql] class HyperLogLogSerializer extends Serializer[HyperLogLog] {
-  def write(kryo: Kryo, output: Output, hyperLogLog: HyperLogLog) {
-    val bytes = hyperLogLog.getBytes()
-    output.writeInt(bytes.length)
-    output.writeBytes(bytes)
-  }
-
-  def read(kryo: Kryo, input: Input, tpe: Class[HyperLogLog]): HyperLogLog = {
-    val length = input.readInt()
-    val bytes = input.readBytes(length)
-    HyperLogLog.Builder.build(bytes)
-  }
-}
-
-private[sql] class OpenHashSetSerializer extends Serializer[OpenHashSet[_]] {
-  def write(kryo: Kryo, output: Output, hs: OpenHashSet[_]) {
-    val rowSerializer = kryo.getDefaultSerializer(classOf[Array[Any]]).asInstanceOf[Serializer[Any]]
-    output.writeInt(hs.size)
-    val iterator = hs.iterator
-    while(iterator.hasNext) {
-      val row = iterator.next()
-      rowSerializer.write(kryo, output, row.asInstanceOf[GenericInternalRow].values)
-    }
-  }
-
-  def read(kryo: Kryo, input: Input, tpe: Class[OpenHashSet[_]]): OpenHashSet[_] = {
-    val rowSerializer = kryo.getDefaultSerializer(classOf[Array[Any]]).asInstanceOf[Serializer[Any]]
-    val numItems = input.readInt()
-    val set = new OpenHashSet[Any](numItems + 1)
-    var i = 0
-    while (i < numItems) {
-      val row =
-        new GenericInternalRow(rowSerializer.read(
-          kryo,
-          input,
-          classOf[Array[Any]].asInstanceOf[Class[Any]]).asInstanceOf[Array[Any]])
-      set.add(row)
-      i += 1
-    }
-    set
-  }
-}
-
-private[sql] class IntegerHashSetSerializer extends Serializer[IntegerHashSet] {
-  def write(kryo: Kryo, output: Output, hs: IntegerHashSet) {
-    output.writeInt(hs.size)
-    val iterator = hs.iterator
-    while(iterator.hasNext) {
-      val value: Int = iterator.next()
-      output.writeInt(value)
-    }
-  }
-
-  def read(kryo: Kryo, input: Input, tpe: Class[IntegerHashSet]): IntegerHashSet = {
-    val numItems = input.readInt()
-    val set = new IntegerHashSet
-    var i = 0
-    while (i < numItems) {
-      val value = input.readInt()
-      set.add(value)
-      i += 1
-    }
-    set
-  }
-}
-
-private[sql] class LongHashSetSerializer extends Serializer[LongHashSet] {
-  def write(kryo: Kryo, output: Output, hs: LongHashSet) {
-    output.writeInt(hs.size)
-    val iterator = hs.iterator
-    while(iterator.hasNext) {
-      val value = iterator.next()
-      output.writeLong(value)
-    }
-  }
-
-  def read(kryo: Kryo, input: Input, tpe: Class[LongHashSet]): LongHashSet = {
-    val numItems = input.readInt()
-    val set = new LongHashSet
-    var i = 0
-    while (i < numItems) {
-      val value = input.readLong()
-      set.add(value)
-      i += 1
-    }
-    set
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
index e31c528f3a63..f602f2fb89ca 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UserDefinedTypeSuite.scala
@@ -23,7 +23,6 @@ import scala.beans.{BeanInfo, BeanProperty}
 
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
-import org.apache.spark.sql.catalyst.expressions.OpenHashSetUDT
 import org.apache.spark.sql.execution.datasources.parquet.ParquetTest
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
@@ -131,15 +130,6 @@ class UserDefinedTypeSuite extends QueryTest with SharedSQLContext with ParquetT
     df.orderBy('int).limit(1).groupBy('int).agg(first('vec)).collect()(0).getAs[MyDenseVector](0)
   }
 
-  test("OpenHashSetUDT") {
-    val openHashSetUDT = new OpenHashSetUDT(IntegerType)
-    val set = new OpenHashSet[Int]
-    (1 to 10).foreach(i => set.add(i))
-
-    val actual = openHashSetUDT.deserialize(openHashSetUDT.serialize(set))
-    assert(actual.iterator.toSet === set.iterator.toSet)
-  }
-
   test("UDTs with JSON") {
     val data = Seq(
       "{\"id\":1,\"vec\":[1.1,2.2,3.3,4.4]}",
@@ -163,7 +153,6 @@ class UserDefinedTypeSuite extends QueryTest with SharedSQLContext with ParquetT
   test("SPARK-10472 UserDefinedType.typeName") {
     assert(IntegerType.typeName === "integer")
     assert(new MyDenseVectorUDT().typeName === "mydensevector")
-    assert(new OpenHashSetUDT(IntegerType).typeName === "openhashset")
   }
 
   test("Catalyst type converter null handling for UDTs") {

From dd77e278b99e45c20fdefb1c795f3c5148d577db Mon Sep 17 00:00:00 2001
From: Nick Evans <me@nicolasevans.org>
Date: Wed, 11 Nov 2015 13:29:30 -0800
Subject: [PATCH 636/896] [SPARK-11335][STREAMING] update kafka direct python
 docs on how to get the offset ranges for a KafkaRDD

tdas koeninger

This updates the Spark Streaming + Kafka Integration Guide doc with a working method to access the offsets of a `KafkaRDD` through Python.

Author: Nick Evans <me@nicolasevans.org>

Closes #9289 from manygrams/update_kafka_direct_python_docs.
---
 docs/streaming-kafka-integration.md | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/docs/streaming-kafka-integration.md b/docs/streaming-kafka-integration.md
index ab7f0117c0b7..b00351b2fbcc 100644
--- a/docs/streaming-kafka-integration.md
+++ b/docs/streaming-kafka-integration.md
@@ -181,7 +181,20 @@ Next, we discuss how to use this approach in your streaming application.
 		);
 	</div>
 	<div data-lang="python" markdown="1">
-		Not supported yet
+		offsetRanges = []
+
+		def storeOffsetRanges(rdd):
+		    global offsetRanges
+		    offsetRanges = rdd.offsetRanges()
+		    return rdd
+
+		def printOffsetRanges(rdd):
+		    for o in offsetRanges:
+		        print "%s %s %s %s" % (o.topic, o.partition, o.fromOffset, o.untilOffset)
+
+		directKafkaStream\
+		    .transform(storeOffsetRanges)\
+		    .foreachRDD(printOffsetRanges)
 	</div>
    	</div>
 

From 2d76e44b1a88e08047806972b2d241a89e499bab Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 11 Nov 2015 14:30:38 -0800
Subject: [PATCH 637/896] [SPARK-11647] Attempt to reduce time/flakiness of
 Thriftserver CLI and SparkSubmit tests

This patch aims to reduce the test time and flakiness of HiveSparkSubmitSuite, SparkSubmitSuite, and CliSuite.

Key changes:

- Disable IO synchronization calls for Derby writes, since durability doesn't matter for tests. This was done for HiveCompatibilitySuite in #6651 and resulted in huge test speedups.
- Add a few missing `--conf`s to disable various Spark UIs. The CliSuite, in particular, never disabled these UIs, leaving it prone to port-contention-related flakiness.
- Fix two instances where tests defined `beforeAll()` methods which were never called because the appropriate traits were not mixed in. I updated these tests suites to extend `BeforeAndAfterEach` so that they play nicely with our `ResetSystemProperties` trait.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9623 from JoshRosen/SPARK-11647.
---
 .../spark/deploy/RPackageUtilsSuite.scala     | 12 ++++++-----
 .../spark/deploy/SparkSubmitSuite.scala       |  6 ++++--
 .../sql/hive/thriftserver/CliSuite.scala      | 21 ++++++++++++-------
 .../spark/sql/hive/HiveSparkSubmitSuite.scala | 17 +++++++++++----
 4 files changed, 38 insertions(+), 18 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/deploy/RPackageUtilsSuite.scala b/core/src/test/scala/org/apache/spark/deploy/RPackageUtilsSuite.scala
index 1ed4bae3ca21..cc30ba223e1c 100644
--- a/core/src/test/scala/org/apache/spark/deploy/RPackageUtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/RPackageUtilsSuite.scala
@@ -33,8 +33,12 @@ import org.scalatest.BeforeAndAfterEach
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.api.r.RUtils
 import org.apache.spark.deploy.SparkSubmitUtils.MavenCoordinate
+import org.apache.spark.util.ResetSystemProperties
 
-class RPackageUtilsSuite extends SparkFunSuite with BeforeAndAfterEach {
+class RPackageUtilsSuite
+  extends SparkFunSuite
+  with BeforeAndAfterEach
+  with ResetSystemProperties {
 
   private val main = MavenCoordinate("a", "b", "c")
   private val dep1 = MavenCoordinate("a", "dep1", "c")
@@ -60,11 +64,9 @@ class RPackageUtilsSuite extends SparkFunSuite with BeforeAndAfterEach {
     }
   }
 
-  def beforeAll() {
-    System.setProperty("spark.testing", "true")
-  }
-
   override def beforeEach(): Unit = {
+    super.beforeEach()
+    System.setProperty("spark.testing", "true")
     lineBuffer.clear()
   }
 
diff --git a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
index 1fd470cd3b01..66a50512003d 100644
--- a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
@@ -23,7 +23,7 @@ import scala.collection.mutable.ArrayBuffer
 
 import com.google.common.base.Charsets.UTF_8
 import com.google.common.io.ByteStreams
-import org.scalatest.Matchers
+import org.scalatest.{BeforeAndAfterEach, Matchers}
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.time.SpanSugar._
 
@@ -37,10 +37,12 @@ import org.apache.spark.util.{ResetSystemProperties, Utils}
 class SparkSubmitSuite
   extends SparkFunSuite
   with Matchers
+  with BeforeAndAfterEach
   with ResetSystemProperties
   with Timeouts {
 
-  def beforeAll() {
+  override def beforeEach() {
+    super.beforeEach()
     System.setProperty("spark.testing", "true")
   }
 
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
index 3fa5c8528b60..fcf039916913 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/CliSuite.scala
@@ -27,7 +27,7 @@ import scala.concurrent.{Await, Promise}
 import org.apache.spark.sql.test.ProcessTestUtils.ProcessOutputCapturer
 
 import org.apache.hadoop.hive.conf.HiveConf.ConfVars
-import org.scalatest.BeforeAndAfter
+import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.util.Utils
 import org.apache.spark.{Logging, SparkFunSuite}
@@ -36,21 +36,26 @@ import org.apache.spark.{Logging, SparkFunSuite}
  * A test suite for the `spark-sql` CLI tool.  Note that all test cases share the same temporary
  * Hive metastore and warehouse.
  */
-class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
+class CliSuite extends SparkFunSuite with BeforeAndAfterAll with Logging {
   val warehousePath = Utils.createTempDir()
   val metastorePath = Utils.createTempDir()
   val scratchDirPath = Utils.createTempDir()
 
-  before {
+  override def beforeAll(): Unit = {
+    super.beforeAll()
     warehousePath.delete()
     metastorePath.delete()
     scratchDirPath.delete()
   }
 
-  after {
-    warehousePath.delete()
-    metastorePath.delete()
-    scratchDirPath.delete()
+  override def afterAll(): Unit = {
+    try {
+      warehousePath.delete()
+      metastorePath.delete()
+      scratchDirPath.delete()
+    } finally {
+      super.afterAll()
+    }
   }
 
   /**
@@ -79,6 +84,8 @@ class CliSuite extends SparkFunSuite with BeforeAndAfter with Logging {
       val jdbcUrl = s"jdbc:derby:;databaseName=$metastorePath;create=true"
       s"""$cliScript
          |  --master local
+         |  --driver-java-options -Dderby.system.durability=test
+         |  --conf spark.ui.enabled=false
          |  --hiveconf ${ConfVars.METASTORECONNECTURLKEY}=$jdbcUrl
          |  --hiveconf ${ConfVars.METASTOREWAREHOUSE}=$warehousePath
          |  --hiveconf ${ConfVars.SCRATCHDIR}=$scratchDirPath
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
index 10e4ae2c5030..24a3afee148c 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveSparkSubmitSuite.scala
@@ -23,7 +23,7 @@ import java.util.Date
 
 import scala.collection.mutable.ArrayBuffer
 
-import org.scalatest.Matchers
+import org.scalatest.{BeforeAndAfterEach, Matchers}
 import org.scalatest.concurrent.Timeouts
 import org.scalatest.exceptions.TestFailedDueToTimeoutException
 import org.scalatest.time.SpanSugar._
@@ -42,14 +42,14 @@ import org.apache.spark.util.{ResetSystemProperties, Utils}
 class HiveSparkSubmitSuite
   extends SparkFunSuite
   with Matchers
-  // This test suite sometimes gets extremely slow out of unknown reason on Jenkins.  Here we
-  // add a timestamp to provide more diagnosis information.
+  with BeforeAndAfterEach
   with ResetSystemProperties
   with Timeouts {
 
   // TODO: rewrite these or mark them as slow tests to be run sparingly
 
-  def beforeAll() {
+  override def beforeEach() {
+    super.beforeEach()
     System.setProperty("spark.testing", "true")
   }
 
@@ -66,6 +66,7 @@ class HiveSparkSubmitSuite
       "--master", "local-cluster[2,1,1024]",
       "--conf", "spark.ui.enabled=false",
       "--conf", "spark.master.rest.enabled=false",
+      "--driver-java-options", "-Dderby.system.durability=test",
       "--jars", jarsString,
       unusedJar.toString, "SparkSubmitClassA", "SparkSubmitClassB")
     runSparkSubmit(args)
@@ -79,6 +80,7 @@ class HiveSparkSubmitSuite
       "--master", "local-cluster[2,1,1024]",
       "--conf", "spark.ui.enabled=false",
       "--conf", "spark.master.rest.enabled=false",
+      "--driver-java-options", "-Dderby.system.durability=test",
       unusedJar.toString)
     runSparkSubmit(args)
   }
@@ -93,6 +95,7 @@ class HiveSparkSubmitSuite
     val args = Seq(
       "--conf", "spark.ui.enabled=false",
       "--conf", "spark.master.rest.enabled=false",
+      "--driver-java-options", "-Dderby.system.durability=test",
       "--class", "Main",
       testJar)
     runSparkSubmit(args)
@@ -104,6 +107,9 @@ class HiveSparkSubmitSuite
       "--class", SPARK_9757.getClass.getName.stripSuffix("$"),
       "--name", "SparkSQLConfTest",
       "--master", "local-cluster[2,1,1024]",
+      "--conf", "spark.ui.enabled=false",
+      "--conf", "spark.master.rest.enabled=false",
+      "--driver-java-options", "-Dderby.system.durability=test",
       unusedJar.toString)
     runSparkSubmit(args)
   }
@@ -114,6 +120,9 @@ class HiveSparkSubmitSuite
       "--class", SPARK_11009.getClass.getName.stripSuffix("$"),
       "--name", "SparkSQLConfTest",
       "--master", "local-cluster[2,1,1024]",
+      "--conf", "spark.ui.enabled=false",
+      "--conf", "spark.master.rest.enabled=false",
+      "--driver-java-options", "-Dderby.system.durability=test",
       unusedJar.toString)
     runSparkSubmit(args)
   }

From e1bcf6af9ba4f131f84d71660d0ab5598c0b7b67 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 11 Nov 2015 15:30:21 -0800
Subject: [PATCH 638/896] [SPARK-10827] replace volatile with Atomic* in
 AppClient.scala.

This is a followup for #9317 to replace volatile fields with AtomicBoolean and AtomicReference.

Author: Reynold Xin <rxin@databricks.com>

Closes #9611 from rxin/SPARK-10827.
---
 .../spark/deploy/client/AppClient.scala       | 68 ++++++++++---------
 1 file changed, 35 insertions(+), 33 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala b/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
index 3f29da663b79..afab362e213b 100644
--- a/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/client/AppClient.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.deploy.client
 
 import java.util.concurrent._
+import java.util.concurrent.atomic.{AtomicBoolean, AtomicReference}
 import java.util.concurrent.{Future => JFuture, ScheduledFuture => JScheduledFuture}
 
 import scala.util.control.NonFatal
@@ -49,9 +50,9 @@ private[spark] class AppClient(
   private val REGISTRATION_TIMEOUT_SECONDS = 20
   private val REGISTRATION_RETRIES = 3
 
-  @volatile private var endpoint: RpcEndpointRef = null
-  @volatile private var appId: String = null
-  @volatile private var registered = false
+  private val endpoint = new AtomicReference[RpcEndpointRef]
+  private val appId = new AtomicReference[String]
+  private val registered = new AtomicBoolean(false)
 
   private class ClientEndpoint(override val rpcEnv: RpcEnv) extends ThreadSafeRpcEndpoint
     with Logging {
@@ -59,16 +60,17 @@ private[spark] class AppClient(
     private var master: Option[RpcEndpointRef] = None
     // To avoid calling listener.disconnected() multiple times
     private var alreadyDisconnected = false
-    @volatile private var alreadyDead = false // To avoid calling listener.dead() multiple times
-    @volatile private var registerMasterFutures: Array[JFuture[_]] = null
-    @volatile private var registrationRetryTimer: JScheduledFuture[_] = null
+    // To avoid calling listener.dead() multiple times
+    private val alreadyDead = new AtomicBoolean(false)
+    private val registerMasterFutures = new AtomicReference[Array[JFuture[_]]]
+    private val registrationRetryTimer = new AtomicReference[JScheduledFuture[_]]
 
     // A thread pool for registering with masters. Because registering with a master is a blocking
     // action, this thread pool must be able to create "masterRpcAddresses.size" threads at the same
     // time so that we can register with all masters.
     private val registerMasterThreadPool = new ThreadPoolExecutor(
       0,
-      masterRpcAddresses.size, // Make sure we can register with all masters at the same time
+      masterRpcAddresses.length, // Make sure we can register with all masters at the same time
       60L, TimeUnit.SECONDS,
       new SynchronousQueue[Runnable](),
       ThreadUtils.namedThreadFactory("appclient-register-master-threadpool"))
@@ -100,7 +102,7 @@ private[spark] class AppClient(
       for (masterAddress <- masterRpcAddresses) yield {
         registerMasterThreadPool.submit(new Runnable {
           override def run(): Unit = try {
-            if (registered) {
+            if (registered.get) {
               return
             }
             logInfo("Connecting to master " + masterAddress.toSparkURL + "...")
@@ -123,22 +125,22 @@ private[spark] class AppClient(
      * nthRetry means this is the nth attempt to register with master.
      */
     private def registerWithMaster(nthRetry: Int) {
-      registerMasterFutures = tryRegisterAllMasters()
-      registrationRetryTimer = registrationRetryThread.scheduleAtFixedRate(new Runnable {
+      registerMasterFutures.set(tryRegisterAllMasters())
+      registrationRetryTimer.set(registrationRetryThread.scheduleAtFixedRate(new Runnable {
         override def run(): Unit = {
           Utils.tryOrExit {
-            if (registered) {
-              registerMasterFutures.foreach(_.cancel(true))
+            if (registered.get) {
+              registerMasterFutures.get.foreach(_.cancel(true))
               registerMasterThreadPool.shutdownNow()
             } else if (nthRetry >= REGISTRATION_RETRIES) {
               markDead("All masters are unresponsive! Giving up.")
             } else {
-              registerMasterFutures.foreach(_.cancel(true))
+              registerMasterFutures.get.foreach(_.cancel(true))
               registerWithMaster(nthRetry + 1)
             }
           }
         }
-      }, REGISTRATION_TIMEOUT_SECONDS, REGISTRATION_TIMEOUT_SECONDS, TimeUnit.SECONDS)
+      }, REGISTRATION_TIMEOUT_SECONDS, REGISTRATION_TIMEOUT_SECONDS, TimeUnit.SECONDS))
     }
 
     /**
@@ -163,10 +165,10 @@ private[spark] class AppClient(
         // RegisteredApplications due to an unstable network.
         // 2. Receive multiple RegisteredApplication from different masters because the master is
         // changing.
-        appId = appId_
-        registered = true
+        appId.set(appId_)
+        registered.set(true)
         master = Some(masterRef)
-        listener.connected(appId)
+        listener.connected(appId.get)
 
       case ApplicationRemoved(message) =>
         markDead("Master removed our application: %s".format(message))
@@ -178,7 +180,7 @@ private[spark] class AppClient(
           cores))
         // FIXME if changing master and `ExecutorAdded` happen at the same time (the order is not
         // guaranteed), `ExecutorStateChanged` may be sent to a dead master.
-        sendToMaster(ExecutorStateChanged(appId, id, ExecutorState.RUNNING, None, None))
+        sendToMaster(ExecutorStateChanged(appId.get, id, ExecutorState.RUNNING, None, None))
         listener.executorAdded(fullId, workerId, hostPort, cores, memory)
 
       case ExecutorUpdated(id, state, message, exitStatus) =>
@@ -193,13 +195,13 @@ private[spark] class AppClient(
         logInfo("Master has changed, new master is at " + masterRef.address.toSparkURL)
         master = Some(masterRef)
         alreadyDisconnected = false
-        masterRef.send(MasterChangeAcknowledged(appId))
+        masterRef.send(MasterChangeAcknowledged(appId.get))
     }
 
     override def receiveAndReply(context: RpcCallContext): PartialFunction[Any, Unit] = {
       case StopAppClient =>
         markDead("Application has been stopped.")
-        sendToMaster(UnregisterApplication(appId))
+        sendToMaster(UnregisterApplication(appId.get))
         context.reply(true)
         stop()
 
@@ -263,18 +265,18 @@ private[spark] class AppClient(
     }
 
     def markDead(reason: String) {
-      if (!alreadyDead) {
+      if (!alreadyDead.get) {
         listener.dead(reason)
-        alreadyDead = true
+        alreadyDead.set(true)
       }
     }
 
     override def onStop(): Unit = {
-      if (registrationRetryTimer != null) {
-        registrationRetryTimer.cancel(true)
+      if (registrationRetryTimer.get != null) {
+        registrationRetryTimer.get.cancel(true)
       }
       registrationRetryThread.shutdownNow()
-      registerMasterFutures.foreach(_.cancel(true))
+      registerMasterFutures.get.foreach(_.cancel(true))
       registerMasterThreadPool.shutdownNow()
       askAndReplyThreadPool.shutdownNow()
     }
@@ -283,19 +285,19 @@ private[spark] class AppClient(
 
   def start() {
     // Just launch an rpcEndpoint; it will call back into the listener.
-    endpoint = rpcEnv.setupEndpoint("AppClient", new ClientEndpoint(rpcEnv))
+    endpoint.set(rpcEnv.setupEndpoint("AppClient", new ClientEndpoint(rpcEnv)))
   }
 
   def stop() {
-    if (endpoint != null) {
+    if (endpoint.get != null) {
       try {
         val timeout = RpcUtils.askRpcTimeout(conf)
-        timeout.awaitResult(endpoint.ask[Boolean](StopAppClient))
+        timeout.awaitResult(endpoint.get.ask[Boolean](StopAppClient))
       } catch {
         case e: TimeoutException =>
           logInfo("Stop request to Master timed out; it may already be shut down.")
       }
-      endpoint = null
+      endpoint.set(null)
     }
   }
 
@@ -306,8 +308,8 @@ private[spark] class AppClient(
    * @return whether the request is acknowledged.
    */
   def requestTotalExecutors(requestedTotal: Int): Boolean = {
-    if (endpoint != null && appId != null) {
-      endpoint.askWithRetry[Boolean](RequestExecutors(appId, requestedTotal))
+    if (endpoint.get != null && appId.get != null) {
+      endpoint.get.askWithRetry[Boolean](RequestExecutors(appId.get, requestedTotal))
     } else {
       logWarning("Attempted to request executors before driver fully initialized.")
       false
@@ -319,8 +321,8 @@ private[spark] class AppClient(
    * @return whether the kill request is acknowledged.
    */
   def killExecutors(executorIds: Seq[String]): Boolean = {
-    if (endpoint != null && appId != null) {
-      endpoint.askWithRetry[Boolean](KillExecutors(appId, executorIds))
+    if (endpoint.get != null && appId.get != null) {
+      endpoint.get.askWithRetry[Boolean](KillExecutors(appId.get, executorIds))
     } else {
       logWarning("Attempted to kill executors before driver fully initialized.")
       false

From 1a21be15f655b9696ddac80aac629445a465f621 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Wed, 11 Nov 2015 15:41:36 -0800
Subject: [PATCH 639/896] [SPARK-11672][ML] disable spark.ml read/write tests

Saw several failures on Jenkins, e.g., https://amplab.cs.berkeley.edu/jenkins/job/NewSparkPullRequestBuilder/2040/testReport/org.apache.spark.ml.util/JavaDefaultReadWriteSuite/testDefaultReadWrite/. This is the first failure in master build:

https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-SBT/3982/

I cannot reproduce it on local. So temporarily disable the tests and I will look into the issue under the same JIRA. I'm going to merge the PR after Jenkins passes compile.

Author: Xiangrui Meng <meng@databricks.com>

Closes #9641 from mengxr/SPARK-11672.
---
 .../org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java   | 4 ++--
 .../spark/ml/classification/LogisticRegressionSuite.scala     | 2 +-
 .../scala/org/apache/spark/ml/feature/BinarizerSuite.scala    | 2 +-
 .../scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
index c39538014be8..4f7aeac1ec54 100644
--- a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
@@ -23,7 +23,7 @@
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
-import org.junit.Test;
+import org.junit.Ignore;
 
 import org.apache.spark.api.java.JavaSparkContext;
 import org.apache.spark.sql.SQLContext;
@@ -50,7 +50,7 @@ public void tearDown() {
     Utils.deleteRecursively(tempDir);
   }
 
-  @Test
+  @Ignore // SPARK-11672
   public void testDefaultReadWrite() throws IOException {
     String uid = "my_params";
     MyParams instance = new MyParams(uid);
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index 51b06b7eb6d5..e4c2f1baa4fa 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -872,7 +872,7 @@ class LogisticRegressionSuite
     assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
   }
 
-  test("read/write") {
+  ignore("read/write") { // SPARK-11672
     // Set some Params to make sure set Params are serialized.
     val lr = new LogisticRegression()
       .setElasticNetParam(0.1)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
index 9dfa1439cc30..a66fe0328193 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
@@ -68,7 +68,7 @@ class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext with Defau
     }
   }
 
-  test("read/write") {
+  ignore("read/write") { // SPARK-11672
     val binarizer = new Binarizer()
       .setInputCol("feature")
       .setOutputCol("binarized_feature")
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index cac4bd9aa3ab..44e09c38f937 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -105,7 +105,7 @@ object MyParams extends Readable[MyParams] {
 class DefaultReadWriteSuite extends SparkFunSuite with MLlibTestSparkContext
   with DefaultReadWriteTest {
 
-  test("default read/write") {
+  ignore("default read/write") { // SPARK-11672
     val myParams = new MyParams("my_params")
     testDefaultReadWrite(myParams)
   }

From b8ff6888e76b437287d7d6bf2d4b9c759710a195 Mon Sep 17 00:00:00 2001
From: Andrew Ray <ray.andrew@gmail.com>
Date: Wed, 11 Nov 2015 16:23:24 -0800
Subject: [PATCH 640/896] [SPARK-8992][SQL] Add pivot to dataframe api

This adds a pivot method to the dataframe api.

Following the lead of cube and rollup this adds a Pivot operator that is translated into an Aggregate by the analyzer.

Currently the syntax is like:
~~courseSales.pivot(Seq($"year"), $"course", Seq("dotNET", "Java"), sum($"earnings"))~~

~~Would we be interested in the following syntax also/alternatively? and~~

    courseSales.groupBy($"year").pivot($"course", "dotNET", "Java").agg(sum($"earnings"))
    //or
    courseSales.groupBy($"year").pivot($"course").agg(sum($"earnings"))

Later we can add it to `SQLParser`, but as Hive doesn't support it we cant add it there, right?

~~Also what would be the suggested Java friendly method signature for this?~~

Author: Andrew Ray <ray.andrew@gmail.com>

Closes #7841 from aray/sql-pivot.
---
 .../sql/catalyst/analysis/Analyzer.scala      |  42 +++++++
 .../plans/logical/basicOperators.scala        |  14 +++
 .../org/apache/spark/sql/GroupedData.scala    | 103 ++++++++++++++++--
 .../scala/org/apache/spark/sql/SQLConf.scala  |   7 ++
 .../spark/sql/DataFramePivotSuite.scala       |  87 +++++++++++++++
 .../apache/spark/sql/test/SQLTestData.scala   |  12 ++
 6 files changed, 255 insertions(+), 10 deletions(-)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index a9cd9a77038e..2f4670b55bdb 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -72,6 +72,7 @@ class Analyzer(
       ResolveRelations ::
       ResolveReferences ::
       ResolveGroupingAnalytics ::
+      ResolvePivot ::
       ResolveSortReferences ::
       ResolveGenerate ::
       ResolveFunctions ::
@@ -166,6 +167,10 @@ class Analyzer(
       case g: GroupingAnalytics if g.child.resolved && hasUnresolvedAlias(g.aggregations) =>
         g.withNewAggs(assignAliases(g.aggregations))
 
+      case Pivot(groupByExprs, pivotColumn, pivotValues, aggregates, child)
+        if child.resolved && hasUnresolvedAlias(groupByExprs) =>
+        Pivot(assignAliases(groupByExprs), pivotColumn, pivotValues, aggregates, child)
+
       case Project(projectList, child) if child.resolved && hasUnresolvedAlias(projectList) =>
         Project(assignAliases(projectList), child)
     }
@@ -248,6 +253,43 @@ class Analyzer(
     }
   }
 
+  object ResolvePivot extends Rule[LogicalPlan] {
+    def apply(plan: LogicalPlan): LogicalPlan = plan transform {
+      case p: Pivot if !p.childrenResolved => p
+      case Pivot(groupByExprs, pivotColumn, pivotValues, aggregates, child) =>
+        val singleAgg = aggregates.size == 1
+        val pivotAggregates: Seq[NamedExpression] = pivotValues.flatMap { value =>
+          def ifExpr(expr: Expression) = {
+            If(EqualTo(pivotColumn, value), expr, Literal(null))
+          }
+          aggregates.map { aggregate =>
+            val filteredAggregate = aggregate.transformDown {
+              // Assumption is the aggregate function ignores nulls. This is true for all current
+              // AggregateFunction's with the exception of First and Last in their default mode
+              // (which we handle) and possibly some Hive UDAF's.
+              case First(expr, _) =>
+                First(ifExpr(expr), Literal(true))
+              case Last(expr, _) =>
+                Last(ifExpr(expr), Literal(true))
+              case a: AggregateFunction =>
+                a.withNewChildren(a.children.map(ifExpr))
+            }
+            if (filteredAggregate.fastEquals(aggregate)) {
+              throw new AnalysisException(
+                s"Aggregate expression required for pivot, found '$aggregate'")
+            }
+            val name = if (singleAgg) value.toString else value + "_" + aggregate.prettyString
+            Alias(filteredAggregate, name)()
+          }
+        }
+        val newGroupByExprs = groupByExprs.map {
+          case UnresolvedAlias(e) => e
+          case e => e
+        }
+        Aggregate(newGroupByExprs, groupByExprs ++ pivotAggregates, child)
+    }
+  }
+
   /**
    * Replaces [[UnresolvedRelation]]s with concrete relations from the catalog.
    */
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 597f03e75270..32b09b59af43 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -386,6 +386,20 @@ case class Rollup(
     this.copy(aggregations = aggs)
 }
 
+case class Pivot(
+    groupByExprs: Seq[NamedExpression],
+    pivotColumn: Expression,
+    pivotValues: Seq[Literal],
+    aggregates: Seq[Expression],
+    child: LogicalPlan) extends UnaryNode {
+  override def output: Seq[Attribute] = groupByExprs.map(_.toAttribute) ++ aggregates match {
+    case agg :: Nil => pivotValues.map(value => AttributeReference(value.toString, agg.dataType)())
+    case _ => pivotValues.flatMap{ value =>
+      aggregates.map(agg => AttributeReference(value + "_" + agg.prettyString, agg.dataType)())
+    }
+  }
+}
+
 case class Limit(limitExpr: Expression, child: LogicalPlan) extends UnaryNode {
   override def output: Seq[Attribute] = child.output
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index 5babf2cc0ca2..63dd7fbcbe9e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -24,8 +24,8 @@ import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, UnresolvedAlias, UnresolvedAttribute, Star}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
-import org.apache.spark.sql.catalyst.plans.logical.{Rollup, Cube, Aggregate}
-import org.apache.spark.sql.types.NumericType
+import org.apache.spark.sql.catalyst.plans.logical.{Pivot, Rollup, Cube, Aggregate}
+import org.apache.spark.sql.types.{StringType, NumericType}
 
 
 /**
@@ -50,14 +50,8 @@ class GroupedData protected[sql](
       aggExprs
     }
 
-    val aliasedAgg = aggregates.map {
-      // Wrap UnresolvedAttribute with UnresolvedAlias, as when we resolve UnresolvedAttribute, we
-      // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
-      // make it a NamedExpression.
-      case u: UnresolvedAttribute => UnresolvedAlias(u)
-      case expr: NamedExpression => expr
-      case expr: Expression => Alias(expr, expr.prettyString)()
-    }
+    val aliasedAgg = aggregates.map(alias)
+
     groupType match {
       case GroupedData.GroupByType =>
         DataFrame(
@@ -68,9 +62,22 @@ class GroupedData protected[sql](
       case GroupedData.CubeType =>
         DataFrame(
           df.sqlContext, Cube(groupingExprs, df.logicalPlan, aliasedAgg))
+      case GroupedData.PivotType(pivotCol, values) =>
+        val aliasedGrps = groupingExprs.map(alias)
+        DataFrame(
+          df.sqlContext, Pivot(aliasedGrps, pivotCol, values, aggExprs, df.logicalPlan))
     }
   }
 
+  // Wrap UnresolvedAttribute with UnresolvedAlias, as when we resolve UnresolvedAttribute, we
+  // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
+  // make it a NamedExpression.
+  private[this] def alias(expr: Expression): NamedExpression = expr match {
+    case u: UnresolvedAttribute => UnresolvedAlias(u)
+    case expr: NamedExpression => expr
+    case expr: Expression => Alias(expr, expr.prettyString)()
+  }
+
   private[this] def aggregateNumericColumns(colNames: String*)(f: Expression => AggregateFunction)
     : DataFrame = {
 
@@ -273,6 +280,77 @@ class GroupedData protected[sql](
   def sum(colNames: String*): DataFrame = {
     aggregateNumericColumns(colNames : _*)(Sum)
   }
+
+  /**
+    * (Scala-specific) Pivots a column of the current [[DataFrame]] and preform the specified
+    * aggregation.
+    * {{{
+    *   // Compute the sum of earnings for each year by course with each course as a separate column
+    *   df.groupBy($"year").pivot($"course", "dotNET", "Java").agg(sum($"earnings"))
+    *   // Or without specifying column values
+    *   df.groupBy($"year").pivot($"course").agg(sum($"earnings"))
+    * }}}
+    * @param pivotColumn Column to pivot
+    * @param values Optional list of values of pivotColumn that will be translated to columns in the
+    *               output data frame. If values are not provided the method with do an immediate
+    *               call to .distinct() on the pivot column.
+    * @since 1.6.0
+    */
+  @scala.annotation.varargs
+  def pivot(pivotColumn: Column, values: Column*): GroupedData = groupType match {
+    case _: GroupedData.PivotType =>
+      throw new UnsupportedOperationException("repeated pivots are not supported")
+    case GroupedData.GroupByType =>
+      val pivotValues = if (values.nonEmpty) {
+        values.map {
+          case Column(literal: Literal) => literal
+          case other =>
+            throw new UnsupportedOperationException(
+              s"The values of a pivot must be literals, found $other")
+        }
+      } else {
+        // This is to prevent unintended OOM errors when the number of distinct values is large
+        val maxValues = df.sqlContext.conf.getConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES)
+        // Get the distinct values of the column and sort them so its consistent
+        val values = df.select(pivotColumn)
+          .distinct()
+          .sort(pivotColumn)
+          .map(_.get(0))
+          .take(maxValues + 1)
+          .map(Literal(_)).toSeq
+        if (values.length > maxValues) {
+          throw new RuntimeException(
+            s"The pivot column $pivotColumn has more than $maxValues distinct values, " +
+              "this could indicate an error. " +
+              "If this was intended, set \"" + SQLConf.DATAFRAME_PIVOT_MAX_VALUES.key + "\" " +
+              s"to at least the number of distinct values of the pivot column.")
+        }
+        values
+      }
+      new GroupedData(df, groupingExprs, GroupedData.PivotType(pivotColumn.expr, pivotValues))
+    case _ =>
+      throw new UnsupportedOperationException("pivot is only supported after a groupBy")
+  }
+
+  /**
+    * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+    * {{{
+    *   // Compute the sum of earnings for each year by course with each course as a separate column
+    *   df.groupBy("year").pivot("course", "dotNET", "Java").sum("earnings")
+    *   // Or without specifying column values
+    *   df.groupBy("year").pivot("course").sum("earnings")
+    * }}}
+    * @param pivotColumn Column to pivot
+    * @param values Optional list of values of pivotColumn that will be translated to columns in the
+    *               output data frame. If values are not provided the method with do an immediate
+    *               call to .distinct() on the pivot column.
+    * @since 1.6.0
+    */
+  @scala.annotation.varargs
+  def pivot(pivotColumn: String, values: Any*): GroupedData = {
+    val resolvedPivotColumn = Column(df.resolve(pivotColumn))
+    pivot(resolvedPivotColumn, values.map(functions.lit): _*)
+  }
 }
 
 
@@ -307,4 +385,9 @@ private[sql] object GroupedData {
    * To indicate it's the ROLLUP
    */
   private[sql] object RollupType extends GroupType
+
+  /**
+    * To indicate it's the PIVOT
+    */
+  private[sql] case class PivotType(pivotCol: Expression, values: Seq[Literal]) extends GroupType
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index e02b502b7b4d..41d28d448ccc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -437,6 +437,13 @@ private[spark] object SQLConf {
     defaultValue = Some(true),
     isPublic = false)
 
+  val DATAFRAME_PIVOT_MAX_VALUES = intConf(
+    "spark.sql.pivotMaxValues",
+    defaultValue = Some(10000),
+    doc = "When doing a pivot without specifying values for the pivot column this is the maximum " +
+      "number of (distinct) values that will be collected without error."
+  )
+
   val RUN_SQL_ON_FILES = booleanConf("spark.sql.runSQLOnFiles",
     defaultValue = Some(true),
     isPublic = false,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala
new file mode 100644
index 000000000000..0c23d142670c
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala
@@ -0,0 +1,87 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql
+
+import org.apache.spark.sql.functions._
+import org.apache.spark.sql.test.SharedSQLContext
+
+class DataFramePivotSuite extends QueryTest with SharedSQLContext{
+  import testImplicits._
+
+  test("pivot courses with literals") {
+    checkAnswer(
+      courseSales.groupBy($"year").pivot($"course", lit("dotNET"), lit("Java"))
+        .agg(sum($"earnings")),
+      Row(2012, 15000.0, 20000.0) :: Row(2013, 48000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot year with literals") {
+    checkAnswer(
+      courseSales.groupBy($"course").pivot($"year", lit(2012), lit(2013)).agg(sum($"earnings")),
+      Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot courses with literals and multiple aggregations") {
+    checkAnswer(
+      courseSales.groupBy($"year").pivot($"course", lit("dotNET"), lit("Java"))
+        .agg(sum($"earnings"), avg($"earnings")),
+      Row(2012, 15000.0, 7500.0, 20000.0, 20000.0) ::
+        Row(2013, 48000.0, 48000.0, 30000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot year with string values (cast)") {
+    checkAnswer(
+      courseSales.groupBy("course").pivot("year", "2012", "2013").sum("earnings"),
+      Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot year with int values") {
+    checkAnswer(
+      courseSales.groupBy("course").pivot("year", 2012, 2013).sum("earnings"),
+      Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot courses with no values") {
+    // Note Java comes before dotNet in sorted order
+    checkAnswer(
+      courseSales.groupBy($"year").pivot($"course").agg(sum($"earnings")),
+      Row(2012, 20000.0, 15000.0) :: Row(2013, 30000.0, 48000.0) :: Nil
+    )
+  }
+
+  test("pivot year with no values") {
+    checkAnswer(
+      courseSales.groupBy($"course").pivot($"year").agg(sum($"earnings")),
+      Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
+    )
+  }
+
+  test("pivot max values inforced") {
+    sqlContext.conf.setConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES, 1)
+    intercept[RuntimeException](
+      courseSales.groupBy($"year").pivot($"course")
+    )
+    sqlContext.conf.setConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES,
+      SQLConf.DATAFRAME_PIVOT_MAX_VALUES.defaultValue.get)
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
index 520dea7f7dd9..abad0d7eaaed 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
@@ -242,6 +242,17 @@ private[sql] trait SQLTestData { self =>
     df
   }
 
+  protected lazy val courseSales: DataFrame = {
+    val df = sqlContext.sparkContext.parallelize(
+      CourseSales("dotNET", 2012, 10000) ::
+        CourseSales("Java", 2012, 20000) ::
+        CourseSales("dotNET", 2012, 5000) ::
+        CourseSales("dotNET", 2013, 48000) ::
+        CourseSales("Java", 2013, 30000) :: Nil).toDF()
+    df.registerTempTable("courseSales")
+    df
+  }
+
   /**
    * Initialize all test data such that all temp tables are properly registered.
    */
@@ -295,4 +306,5 @@ private[sql] object SQLTestData {
   case class Person(id: Int, name: String, age: Int)
   case class Salary(personId: Int, salary: Double)
   case class ComplexData(m: Map[String, Int], s: TestData, a: Seq[Int], b: Boolean)
+  case class CourseSales(course: String, year: Int, earnings: Double)
 }

From e49e723392b8a64d30bd90944a748eb6f5ef3a8a Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 11 Nov 2015 19:32:52 -0800
Subject: [PATCH 641/896] [SPARK-11675][SQL] Remove shuffle hash joins.

Author: Reynold Xin <rxin@databricks.com>

Closes #9645 from rxin/SPARK-11675.
---
 .../scala/org/apache/spark/sql/SQLConf.scala  |   9 +-
 .../spark/sql/execution/SparkStrategies.scala |  24 +-
 .../apache/spark/sql/execution/commands.scala |  11 +
 .../execution/joins/ShuffledHashJoin.scala    |  62 ---
 .../joins/ShuffledHashOuterJoin.scala         | 109 ----
 .../org/apache/spark/sql/JoinSuite.scala      | 523 ++++++++----------
 .../org/apache/spark/sql/SQLQuerySuite.scala  |   3 +-
 .../spark/sql/execution/PlannerSuite.scala    |  10 +-
 .../sql/execution/joins/InnerJoinSuite.scala  |  38 --
 .../sql/execution/joins/OuterJoinSuite.scala  |  12 -
 .../execution/metric/SQLMetricsSuite.scala    | 271 ++++-----
 .../spark/sql/hive/StatisticsSuite.scala      |   2 +-
 12 files changed, 357 insertions(+), 717 deletions(-)
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
 delete mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index 41d28d448ccc..f40e603cd193 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -353,12 +353,6 @@ private[spark] object SQLConf {
     defaultValue = Some(5 * 60),
     doc = "Timeout in seconds for the broadcast wait time in broadcast joins.")
 
-  // Options that control which operators can be chosen by the query planner.  These should be
-  // considered hints and may be ignored by future versions of Spark SQL.
-  val SORTMERGE_JOIN = booleanConf("spark.sql.planner.sortMergeJoin",
-    defaultValue = Some(true),
-    doc = "When true, use sort merge join (as opposed to hash join) by default for large joins.")
-
   // This is only used for the thriftserver
   val THRIFTSERVER_POOL = stringConf("spark.sql.thriftserver.scheduler.pool",
     doc = "Set a Fair Scheduler pool for a JDBC client session")
@@ -469,6 +463,7 @@ private[spark] object SQLConf {
     val TUNGSTEN_ENABLED = "spark.sql.tungsten.enabled"
     val CODEGEN_ENABLED = "spark.sql.codegen"
     val UNSAFE_ENABLED = "spark.sql.unsafe.enabled"
+    val SORTMERGE_JOIN = "spark.sql.planner.sortMergeJoin"
   }
 }
 
@@ -533,8 +528,6 @@ private[sql] class SQLConf extends Serializable with CatalystConf {
 
   private[spark] def nativeView: Boolean = getConf(NATIVE_VIEW)
 
-  private[spark] def sortMergeJoinEnabled: Boolean = getConf(SORTMERGE_JOIN)
-
   def caseSensitiveAnalysis: Boolean = getConf(SQLConf.CASE_SENSITIVE)
 
   private[spark] def subexpressionEliminationEnabled: Boolean =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 96242f160aa5..90989f2cee9a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -73,10 +73,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
    *     [[org.apache.spark.sql.functions.broadcast()]] function to a DataFrame), then that side
    *     of the join will be broadcasted and the other side will be streamed, with no shuffling
    *     performed. If both sides of the join are eligible to be broadcasted then the
-   * - Sort merge: if the matching join keys are sortable and
-   *     [[org.apache.spark.sql.SQLConf.SORTMERGE_JOIN]] is enabled (default), then sort merge join
-   *     will be used.
-   * - Hash: will be chosen if neither of the above optimizations apply to this join.
+   * - Sort merge: if the matching join keys are sortable.
    */
   object EquiJoinSelection extends Strategy with PredicateHelper {
 
@@ -103,22 +100,11 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
         makeBroadcastHashJoin(leftKeys, rightKeys, left, right, condition, joins.BuildLeft)
 
       case ExtractEquiJoinKeys(Inner, leftKeys, rightKeys, condition, left, right)
-        if sqlContext.conf.sortMergeJoinEnabled && RowOrdering.isOrderable(leftKeys) =>
+        if RowOrdering.isOrderable(leftKeys) =>
         val mergeJoin =
           joins.SortMergeJoin(leftKeys, rightKeys, planLater(left), planLater(right))
         condition.map(Filter(_, mergeJoin)).getOrElse(mergeJoin) :: Nil
 
-      case ExtractEquiJoinKeys(Inner, leftKeys, rightKeys, condition, left, right) =>
-        val buildSide =
-          if (right.statistics.sizeInBytes <= left.statistics.sizeInBytes) {
-            joins.BuildRight
-          } else {
-            joins.BuildLeft
-          }
-        val hashJoin = joins.ShuffledHashJoin(
-          leftKeys, rightKeys, buildSide, planLater(left), planLater(right))
-        condition.map(Filter(_, hashJoin)).getOrElse(hashJoin) :: Nil
-
       // --- Outer joins --------------------------------------------------------------------------
 
       case ExtractEquiJoinKeys(
@@ -132,14 +118,10 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
           leftKeys, rightKeys, RightOuter, condition, planLater(left), planLater(right)) :: Nil
 
       case ExtractEquiJoinKeys(joinType, leftKeys, rightKeys, condition, left, right)
-        if sqlContext.conf.sortMergeJoinEnabled && RowOrdering.isOrderable(leftKeys) =>
+        if RowOrdering.isOrderable(leftKeys) =>
         joins.SortMergeOuterJoin(
           leftKeys, rightKeys, joinType, condition, planLater(left), planLater(right)) :: Nil
 
-      case ExtractEquiJoinKeys(joinType, leftKeys, rightKeys, condition, left, right) =>
-        joins.ShuffledHashOuterJoin(
-          leftKeys, rightKeys, joinType, condition, planLater(left), planLater(right)) :: Nil
-
       // --- Cases where this strategy does not apply ---------------------------------------------
 
       case _ => Nil
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
index e29c281b951f..24a79f289aa8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala
@@ -148,6 +148,17 @@ case class SetCommand(kv: Option[(String, Option[String])]) extends RunnableComm
       }
       (keyValueOutput, runFunc)
 
+      (keyValueOutput, runFunc)
+
+    case Some((SQLConf.Deprecated.SORTMERGE_JOIN, Some(value))) =>
+      val runFunc = (sqlContext: SQLContext) => {
+        logWarning(
+          s"Property ${SQLConf.Deprecated.SORTMERGE_JOIN} is deprecated and " +
+            s"will be ignored. Sort merge join will continue to be used.")
+        Seq(Row(SQLConf.Deprecated.SORTMERGE_JOIN, "true"))
+      }
+      (keyValueOutput, runFunc)
+
     // Configures a single property.
     case Some((key, Some(value))) =>
       val runFunc = (sqlContext: SQLContext) => {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
deleted file mode 100644
index 755986af8b95..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashJoin.scala
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.joins
-
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.Expression
-import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
-import org.apache.spark.sql.execution.metric.SQLMetrics
-
-/**
- * Performs an inner hash join of two child relations by first shuffling the data using the join
- * keys.
- */
-case class ShuffledHashJoin(
-    leftKeys: Seq[Expression],
-    rightKeys: Seq[Expression],
-    buildSide: BuildSide,
-    left: SparkPlan,
-    right: SparkPlan)
-  extends BinaryNode with HashJoin {
-
-  override private[sql] lazy val metrics = Map(
-    "numLeftRows" -> SQLMetrics.createLongMetric(sparkContext, "number of left rows"),
-    "numRightRows" -> SQLMetrics.createLongMetric(sparkContext, "number of right rows"),
-    "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"))
-
-  override def outputPartitioning: Partitioning =
-    PartitioningCollection(Seq(left.outputPartitioning, right.outputPartitioning))
-
-  override def requiredChildDistribution: Seq[Distribution] =
-    ClusteredDistribution(leftKeys) :: ClusteredDistribution(rightKeys) :: Nil
-
-  protected override def doExecute(): RDD[InternalRow] = {
-    val (numBuildRows, numStreamedRows) = buildSide match {
-      case BuildLeft => (longMetric("numLeftRows"), longMetric("numRightRows"))
-      case BuildRight => (longMetric("numRightRows"), longMetric("numLeftRows"))
-    }
-    val numOutputRows = longMetric("numOutputRows")
-
-    buildPlan.execute().zipPartitions(streamedPlan.execute()) { (buildIter, streamIter) =>
-      val hashed = HashedRelation(buildIter, numBuildRows, buildSideKeyGenerator)
-      hashJoin(streamIter, numStreamedRows, hashed, numOutputRows)
-    }
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala
deleted file mode 100644
index 6b2cb9d8f689..000000000000
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/ShuffledHashOuterJoin.scala
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution.joins
-
-import scala.collection.JavaConverters._
-
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.catalyst.plans.{FullOuter, JoinType, LeftOuter, RightOuter}
-import org.apache.spark.sql.execution.{BinaryNode, SparkPlan}
-import org.apache.spark.sql.execution.metric.SQLMetrics
-
-/**
- * Performs a hash based outer join for two child relations by shuffling the data using
- * the join keys. This operator requires loading the associated partition in both side into memory.
- */
-case class ShuffledHashOuterJoin(
-    leftKeys: Seq[Expression],
-    rightKeys: Seq[Expression],
-    joinType: JoinType,
-    condition: Option[Expression],
-    left: SparkPlan,
-    right: SparkPlan) extends BinaryNode with HashOuterJoin {
-
-  override private[sql] lazy val metrics = Map(
-    "numLeftRows" -> SQLMetrics.createLongMetric(sparkContext, "number of left rows"),
-    "numRightRows" -> SQLMetrics.createLongMetric(sparkContext, "number of right rows"),
-    "numOutputRows" -> SQLMetrics.createLongMetric(sparkContext, "number of output rows"))
-
-  override def requiredChildDistribution: Seq[Distribution] =
-    ClusteredDistribution(leftKeys) :: ClusteredDistribution(rightKeys) :: Nil
-
-  override def outputPartitioning: Partitioning = joinType match {
-    case LeftOuter => left.outputPartitioning
-    case RightOuter => right.outputPartitioning
-    case FullOuter => UnknownPartitioning(left.outputPartitioning.numPartitions)
-    case x =>
-      throw new IllegalArgumentException(s"HashOuterJoin should not take $x as the JoinType")
-  }
-
-  protected override def doExecute(): RDD[InternalRow] = {
-    val numLeftRows = longMetric("numLeftRows")
-    val numRightRows = longMetric("numRightRows")
-    val numOutputRows = longMetric("numOutputRows")
-
-    val joinedRow = new JoinedRow()
-    left.execute().zipPartitions(right.execute()) { (leftIter, rightIter) =>
-      // TODO this probably can be replaced by external sort (sort merged join?)
-      joinType match {
-        case LeftOuter =>
-          val hashed = HashedRelation(rightIter, numRightRows, buildKeyGenerator)
-          val keyGenerator = streamedKeyGenerator
-          val resultProj = resultProjection
-          leftIter.flatMap( currentRow => {
-            numLeftRows += 1
-            val rowKey = keyGenerator(currentRow)
-            joinedRow.withLeft(currentRow)
-            leftOuterIterator(rowKey, joinedRow, hashed.get(rowKey), resultProj, numOutputRows)
-          })
-
-        case RightOuter =>
-          val hashed = HashedRelation(leftIter, numLeftRows, buildKeyGenerator)
-          val keyGenerator = streamedKeyGenerator
-          val resultProj = resultProjection
-          rightIter.flatMap ( currentRow => {
-            numRightRows += 1
-            val rowKey = keyGenerator(currentRow)
-            joinedRow.withRight(currentRow)
-            rightOuterIterator(rowKey, hashed.get(rowKey), joinedRow, resultProj, numOutputRows)
-          })
-
-        case FullOuter =>
-          // TODO(davies): use UnsafeRow
-          val leftHashTable =
-            buildHashTable(leftIter, numLeftRows, newProjection(leftKeys, left.output)).asScala
-          val rightHashTable =
-            buildHashTable(rightIter, numRightRows, newProjection(rightKeys, right.output)).asScala
-          (leftHashTable.keySet ++ rightHashTable.keySet).iterator.flatMap { key =>
-            fullOuterIterator(key,
-              leftHashTable.getOrElse(key, EMPTY_LIST),
-              rightHashTable.getOrElse(key, EMPTY_LIST),
-              joinedRow,
-              numOutputRows)
-          }
-
-        case x =>
-          throw new IllegalArgumentException(
-            s"ShuffledHashOuterJoin should not take $x as the JoinType")
-      }
-    }
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
index 3f3b837f7581..9a3c262e9485 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/JoinSuite.scala
@@ -44,8 +44,6 @@ class JoinSuite extends QueryTest with SharedSQLContext {
     val df = sql(sqlString)
     val physical = df.queryExecution.sparkPlan
     val operators = physical.collect {
-      case j: ShuffledHashJoin => j
-      case j: ShuffledHashOuterJoin => j
       case j: LeftSemiJoinHash => j
       case j: BroadcastHashJoin => j
       case j: BroadcastHashOuterJoin => j
@@ -96,75 +94,39 @@ class JoinSuite extends QueryTest with SharedSQLContext {
       ("SELECT * FROM testData full JOIN testData2 ON (key * a != key + a)",
         classOf[BroadcastNestedLoopJoin])
     ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      Seq(
-        ("SELECT * FROM testData JOIN testData2 ON key = a", classOf[ShuffledHashJoin]),
-        ("SELECT * FROM testData JOIN testData2 ON key = a and key = 2",
-          classOf[ShuffledHashJoin]),
-        ("SELECT * FROM testData JOIN testData2 ON key = a where key = 2",
-          classOf[ShuffledHashJoin]),
-        ("SELECT * FROM testData LEFT JOIN testData2 ON key = a", classOf[ShuffledHashOuterJoin]),
-        ("SELECT * FROM testData RIGHT JOIN testData2 ON key = a where key = 2",
-          classOf[ShuffledHashOuterJoin]),
-        ("SELECT * FROM testData right join testData2 ON key = a and key = 2",
-          classOf[ShuffledHashOuterJoin]),
-        ("SELECT * FROM testData full outer join testData2 ON key = a",
-          classOf[ShuffledHashOuterJoin])
-      ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-    }
   }
 
-  test("SortMergeJoin shouldn't work on unsortable columns") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true") {
-      Seq(
-        ("SELECT * FROM arrayData JOIN complexData ON data = a", classOf[ShuffledHashJoin])
-      ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-    }
-  }
+//  ignore("SortMergeJoin shouldn't work on unsortable columns") {
+//    Seq(
+//      ("SELECT * FROM arrayData JOIN complexData ON data = a", classOf[ShuffledHashJoin])
+//    ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
+//  }
 
   test("broadcasted hash join operator selection") {
     sqlContext.cacheManager.clearCache()
     sql("CACHE TABLE testData")
-    for (sortMergeJoinEnabled <- Seq(true, false)) {
-      withClue(s"sortMergeJoinEnabled=$sortMergeJoinEnabled") {
-        withSQLConf(SQLConf.SORTMERGE_JOIN.key -> s"$sortMergeJoinEnabled") {
-          Seq(
-            ("SELECT * FROM testData join testData2 ON key = a",
-              classOf[BroadcastHashJoin]),
-            ("SELECT * FROM testData join testData2 ON key = a and key = 2",
-              classOf[BroadcastHashJoin]),
-            ("SELECT * FROM testData join testData2 ON key = a where key = 2",
-              classOf[BroadcastHashJoin])
-          ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-        }
-      }
-    }
+    Seq(
+      ("SELECT * FROM testData join testData2 ON key = a",
+        classOf[BroadcastHashJoin]),
+      ("SELECT * FROM testData join testData2 ON key = a and key = 2",
+        classOf[BroadcastHashJoin]),
+      ("SELECT * FROM testData join testData2 ON key = a where key = 2",
+        classOf[BroadcastHashJoin])
+    ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
     sql("UNCACHE TABLE testData")
   }
 
   test("broadcasted hash outer join operator selection") {
     sqlContext.cacheManager.clearCache()
     sql("CACHE TABLE testData")
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true") {
-      Seq(
-        ("SELECT * FROM testData LEFT JOIN testData2 ON key = a",
-          classOf[SortMergeOuterJoin]),
-        ("SELECT * FROM testData RIGHT JOIN testData2 ON key = a where key = 2",
-          classOf[BroadcastHashOuterJoin]),
-        ("SELECT * FROM testData right join testData2 ON key = a and key = 2",
-          classOf[BroadcastHashOuterJoin])
-      ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-    }
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      Seq(
-        ("SELECT * FROM testData LEFT JOIN testData2 ON key = a",
-          classOf[ShuffledHashOuterJoin]),
-        ("SELECT * FROM testData RIGHT JOIN testData2 ON key = a where key = 2",
-          classOf[BroadcastHashOuterJoin]),
-        ("SELECT * FROM testData right join testData2 ON key = a and key = 2",
-          classOf[BroadcastHashOuterJoin])
-      ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
-    }
+    Seq(
+      ("SELECT * FROM testData LEFT JOIN testData2 ON key = a",
+        classOf[SortMergeOuterJoin]),
+      ("SELECT * FROM testData RIGHT JOIN testData2 ON key = a where key = 2",
+        classOf[BroadcastHashOuterJoin]),
+      ("SELECT * FROM testData right join testData2 ON key = a and key = 2",
+        classOf[BroadcastHashOuterJoin])
+    ).foreach { case (query, joinClass) => assertJoin(query, joinClass) }
     sql("UNCACHE TABLE testData")
   }
 
@@ -237,241 +199,222 @@ class JoinSuite extends QueryTest with SharedSQLContext {
         Row(2, 2, 2, 2) :: Nil)
   }
 
-  def test_outer_join(useSMJ: Boolean): Unit = {
-
-    val algo = if (useSMJ) "SortMergeOuterJoin" else "ShuffledHashOuterJoin"
-
-    test("left outer join: " + algo) {
-      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
-
-        checkAnswer(
-          upperCaseData.join(lowerCaseData, $"n" === $"N", "left"),
-          Row(1, "A", 1, "a") ::
-            Row(2, "B", 2, "b") ::
-            Row(3, "C", 3, "c") ::
-            Row(4, "D", 4, "d") ::
-            Row(5, "E", null, null) ::
-            Row(6, "F", null, null) :: Nil)
-
-        checkAnswer(
-          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"n" > 1, "left"),
-          Row(1, "A", null, null) ::
-            Row(2, "B", 2, "b") ::
-            Row(3, "C", 3, "c") ::
-            Row(4, "D", 4, "d") ::
-            Row(5, "E", null, null) ::
-            Row(6, "F", null, null) :: Nil)
-
-        checkAnswer(
-          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"N" > 1, "left"),
-          Row(1, "A", null, null) ::
-            Row(2, "B", 2, "b") ::
-            Row(3, "C", 3, "c") ::
-            Row(4, "D", 4, "d") ::
-            Row(5, "E", null, null) ::
-            Row(6, "F", null, null) :: Nil)
-
-        checkAnswer(
-          upperCaseData.join(lowerCaseData, $"n" === $"N" && $"l" > $"L", "left"),
-          Row(1, "A", 1, "a") ::
-            Row(2, "B", 2, "b") ::
-            Row(3, "C", 3, "c") ::
-            Row(4, "D", 4, "d") ::
-            Row(5, "E", null, null) ::
-            Row(6, "F", null, null) :: Nil)
-
-        // Make sure we are choosing left.outputPartitioning as the
-        // outputPartitioning for the outer join operator.
-        checkAnswer(
-          sql(
-            """
-            |SELECT l.N, count(*)
-            |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
-            |GROUP BY l.N
-          """.
-              stripMargin),
-        Row(1, 1) ::
-          Row(2, 1) ::
-          Row(3, 1) ::
-          Row(4, 1) ::
-          Row(5, 1) ::
-          Row(6, 1) :: Nil)
-
-        checkAnswer(
-          sql(
-            """
-              |SELECT r.a, count(*)
-              |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
-              |GROUP BY r.a
-            """.stripMargin),
-          Row(null, 6) :: Nil)
-      }
-    }
+  test("left outer join") {
+    checkAnswer(
+      upperCaseData.join(lowerCaseData, $"n" === $"N", "left"),
+      Row(1, "A", 1, "a") ::
+        Row(2, "B", 2, "b") ::
+        Row(3, "C", 3, "c") ::
+        Row(4, "D", 4, "d") ::
+        Row(5, "E", null, null) ::
+        Row(6, "F", null, null) :: Nil)
 
-    test("right outer join: " + algo) {
-      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
-        checkAnswer(
-          lowerCaseData.join(upperCaseData, $"n" === $"N", "right"),
-          Row(1, "a", 1, "A") ::
-            Row(2, "b", 2, "B") ::
-            Row(3, "c", 3, "C") ::
-            Row(4, "d", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-        checkAnswer(
-          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"n" > 1, "right"),
-          Row(null, null, 1, "A") ::
-            Row(2, "b", 2, "B") ::
-            Row(3, "c", 3, "C") ::
-            Row(4, "d", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-        checkAnswer(
-          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"N" > 1, "right"),
-          Row(null, null, 1, "A") ::
-            Row(2, "b", 2, "B") ::
-            Row(3, "c", 3, "C") ::
-            Row(4, "d", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-        checkAnswer(
-          lowerCaseData.join(upperCaseData, $"n" === $"N" && $"l" > $"L", "right"),
-          Row(1, "a", 1, "A") ::
-            Row(2, "b", 2, "B") ::
-            Row(3, "c", 3, "C") ::
-            Row(4, "d", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-
-        // Make sure we are choosing right.outputPartitioning as the
-        // outputPartitioning for the outer join operator.
-        checkAnswer(
-          sql(
-            """
-              |SELECT l.a, count(*)
-              |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
-              |GROUP BY l.a
-            """.stripMargin),
-          Row(null,
-            6))
-
-        checkAnswer(
-          sql(
-            """
-              |SELECT r.N, count(*)
-              |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
-              |GROUP BY r.N
-            """.stripMargin),
-          Row(1
-            , 1) ::
-            Row(2, 1) ::
-            Row(3, 1) ::
-            Row(4, 1) ::
-            Row(5, 1) ::
-            Row(6, 1) :: Nil)
-        }
-      }
+    checkAnswer(
+      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"n" > 1, "left"),
+      Row(1, "A", null, null) ::
+        Row(2, "B", 2, "b") ::
+        Row(3, "C", 3, "c") ::
+        Row(4, "D", 4, "d") ::
+        Row(5, "E", null, null) ::
+        Row(6, "F", null, null) :: Nil)
 
-    test("full outer join: " + algo) {
-      withSQLConf(SQLConf.SORTMERGE_JOIN.key -> useSMJ.toString) {
-
-        upperCaseData.where('N <= 4).registerTempTable("left")
-        upperCaseData.where('N >= 3).registerTempTable("right")
-
-        val left = UnresolvedRelation(TableIdentifier("left"), None)
-        val right = UnresolvedRelation(TableIdentifier("right"), None)
-
-        checkAnswer(
-          left.join(right, $"left.N" === $"right.N", "full"),
-          Row(1, "A", null, null) ::
-            Row(2, "B", null, null) ::
-            Row(3, "C", 3, "C") ::
-            Row(4, "D", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-
-        checkAnswer(
-          left.join(right, ($"left.N" === $"right.N") && ($"left.N" !== 3), "full"),
-          Row(1, "A", null, null) ::
-            Row(2, "B", null, null) ::
-            Row(3, "C", null, null) ::
-            Row(null, null, 3, "C") ::
-            Row(4, "D", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-
-        checkAnswer(
-          left.join(right, ($"left.N" === $"right.N") && ($"right.N" !== 3), "full"),
-          Row(1, "A", null, null) ::
-            Row(2, "B", null, null) ::
-            Row(3, "C", null, null) ::
-            Row(null, null, 3, "C") ::
-            Row(4, "D", 4, "D") ::
-            Row(null, null, 5, "E") ::
-            Row(null, null, 6, "F") :: Nil)
-
-        // Make sure we are UnknownPartitioning as the outputPartitioning for the outer join
-        // operator.
-        checkAnswer(
-          sql(
-            """
-            |SELECT l.a, count(*)
-            |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
-            |GROUP BY l.a
-          """.
-              stripMargin),
-        Row(
-          null, 10))
-
-        checkAnswer(
-          sql(
-            """
-              |SELECT r.N, count(*)
-              |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
-              |GROUP BY r.N
-            """.stripMargin),
-          Row
-            (1, 1) ::
-            Row(2, 1) ::
-            Row(3, 1) ::
-            Row(4, 1) ::
-            Row(5, 1) ::
-            Row(6, 1) ::
-            Row(null, 4) :: Nil)
-
-        checkAnswer(
-          sql(
-            """
-              |SELECT l.N, count(*)
-              |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
-              |GROUP BY l.N
-            """.stripMargin),
-          Row(1
-            , 1) ::
-            Row(2, 1) ::
-            Row(3, 1) ::
-            Row(4, 1) ::
-            Row(5, 1) ::
-            Row(6, 1) ::
-            Row(null, 4) :: Nil)
-
-        checkAnswer(
-          sql(
-            """
-            |SELECT r.a, count(*)
-            |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
-            |GROUP BY r.a
-          """.
-              stripMargin),
-          Row(null, 10))
-      }
-    }
+    checkAnswer(
+      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"N" > 1, "left"),
+      Row(1, "A", null, null) ::
+        Row(2, "B", 2, "b") ::
+        Row(3, "C", 3, "c") ::
+        Row(4, "D", 4, "d") ::
+        Row(5, "E", null, null) ::
+        Row(6, "F", null, null) :: Nil)
+
+    checkAnswer(
+      upperCaseData.join(lowerCaseData, $"n" === $"N" && $"l" > $"L", "left"),
+      Row(1, "A", 1, "a") ::
+        Row(2, "B", 2, "b") ::
+        Row(3, "C", 3, "c") ::
+        Row(4, "D", 4, "d") ::
+        Row(5, "E", null, null) ::
+        Row(6, "F", null, null) :: Nil)
+
+    // Make sure we are choosing left.outputPartitioning as the
+    // outputPartitioning for the outer join operator.
+    checkAnswer(
+      sql(
+        """
+        |SELECT l.N, count(*)
+        |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
+        |GROUP BY l.N
+      """.
+          stripMargin),
+    Row(1, 1) ::
+      Row(2, 1) ::
+      Row(3, 1) ::
+      Row(4, 1) ::
+      Row(5, 1) ::
+      Row(6, 1) :: Nil)
+
+    checkAnswer(
+      sql(
+        """
+          |SELECT r.a, count(*)
+          |FROM upperCaseData l LEFT OUTER JOIN allNulls r ON (l.N = r.a)
+          |GROUP BY r.a
+        """.stripMargin),
+      Row(null, 6) :: Nil)
+  }
+
+  test("right outer join") {
+    checkAnswer(
+      lowerCaseData.join(upperCaseData, $"n" === $"N", "right"),
+      Row(1, "a", 1, "A") ::
+        Row(2, "b", 2, "B") ::
+        Row(3, "c", 3, "C") ::
+        Row(4, "d", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+    checkAnswer(
+      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"n" > 1, "right"),
+      Row(null, null, 1, "A") ::
+        Row(2, "b", 2, "B") ::
+        Row(3, "c", 3, "C") ::
+        Row(4, "d", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+    checkAnswer(
+      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"N" > 1, "right"),
+      Row(null, null, 1, "A") ::
+        Row(2, "b", 2, "B") ::
+        Row(3, "c", 3, "C") ::
+        Row(4, "d", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+    checkAnswer(
+      lowerCaseData.join(upperCaseData, $"n" === $"N" && $"l" > $"L", "right"),
+      Row(1, "a", 1, "A") ::
+        Row(2, "b", 2, "B") ::
+        Row(3, "c", 3, "C") ::
+        Row(4, "d", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+
+    // Make sure we are choosing right.outputPartitioning as the
+    // outputPartitioning for the outer join operator.
+    checkAnswer(
+      sql(
+        """
+          |SELECT l.a, count(*)
+          |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
+          |GROUP BY l.a
+        """.stripMargin),
+      Row(null,
+        6))
+
+    checkAnswer(
+      sql(
+        """
+          |SELECT r.N, count(*)
+          |FROM allNulls l RIGHT OUTER JOIN upperCaseData r ON (l.a = r.N)
+          |GROUP BY r.N
+        """.stripMargin),
+      Row(1
+        , 1) ::
+        Row(2, 1) ::
+        Row(3, 1) ::
+        Row(4, 1) ::
+        Row(5, 1) ::
+        Row(6, 1) :: Nil)
   }
 
-  // test SortMergeOuterJoin
-  test_outer_join(true)
-  // test ShuffledHashOuterJoin
-  test_outer_join(false)
+  test("full outer join") {
+    upperCaseData.where('N <= 4).registerTempTable("left")
+    upperCaseData.where('N >= 3).registerTempTable("right")
+
+    val left = UnresolvedRelation(TableIdentifier("left"), None)
+    val right = UnresolvedRelation(TableIdentifier("right"), None)
+
+    checkAnswer(
+      left.join(right, $"left.N" === $"right.N", "full"),
+      Row(1, "A", null, null) ::
+        Row(2, "B", null, null) ::
+        Row(3, "C", 3, "C") ::
+        Row(4, "D", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+
+    checkAnswer(
+      left.join(right, ($"left.N" === $"right.N") && ($"left.N" !== 3), "full"),
+      Row(1, "A", null, null) ::
+        Row(2, "B", null, null) ::
+        Row(3, "C", null, null) ::
+        Row(null, null, 3, "C") ::
+        Row(4, "D", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+
+    checkAnswer(
+      left.join(right, ($"left.N" === $"right.N") && ($"right.N" !== 3), "full"),
+      Row(1, "A", null, null) ::
+        Row(2, "B", null, null) ::
+        Row(3, "C", null, null) ::
+        Row(null, null, 3, "C") ::
+        Row(4, "D", 4, "D") ::
+        Row(null, null, 5, "E") ::
+        Row(null, null, 6, "F") :: Nil)
+
+    // Make sure we are UnknownPartitioning as the outputPartitioning for the outer join
+    // operator.
+    checkAnswer(
+      sql(
+        """
+        |SELECT l.a, count(*)
+        |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
+        |GROUP BY l.a
+      """.
+          stripMargin),
+      Row(null, 10))
+
+    checkAnswer(
+      sql(
+        """
+          |SELECT r.N, count(*)
+          |FROM allNulls l FULL OUTER JOIN upperCaseData r ON (l.a = r.N)
+          |GROUP BY r.N
+        """.stripMargin),
+      Row
+        (1, 1) ::
+        Row(2, 1) ::
+        Row(3, 1) ::
+        Row(4, 1) ::
+        Row(5, 1) ::
+        Row(6, 1) ::
+        Row(null, 4) :: Nil)
+
+    checkAnswer(
+      sql(
+        """
+          |SELECT l.N, count(*)
+          |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
+          |GROUP BY l.N
+        """.stripMargin),
+      Row(1
+        , 1) ::
+        Row(2, 1) ::
+        Row(3, 1) ::
+        Row(4, 1) ::
+        Row(5, 1) ::
+        Row(6, 1) ::
+        Row(null, 4) :: Nil)
+
+    checkAnswer(
+      sql(
+        """
+        |SELECT r.a, count(*)
+        |FROM upperCaseData l FULL OUTER JOIN allNulls r ON (l.N = r.a)
+        |GROUP BY r.a
+      """.
+          stripMargin),
+      Row(null, 10))
+  }
 
   test("broadcasted left semi join operator selection") {
     sqlContext.cacheManager.clearCache()
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index acabe32c67bc..52a561d2e545 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1771,8 +1771,7 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     // This test is for the fix of https://issues.apache.org/jira/browse/SPARK-10737.
     // This bug will be triggered when Tungsten is enabled and there are multiple
     // SortMergeJoin operators executed in the same task.
-    val confs =
-      SQLConf.SORTMERGE_JOIN.key -> "true" :: SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "1" :: Nil
+    val confs = SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "1" :: Nil
     withSQLConf(confs: _*) {
       val df1 = (1 to 50).map(i => (s"str_$i", i)).toDF("i", "j")
       val df2 =
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index 44634dacbde6..8c41d79dae81 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -24,7 +24,7 @@ import org.apache.spark.sql.catalyst.expressions.{Ascending, Attribute, Literal,
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.execution.joins.{BroadcastHashJoin, ShuffledHashJoin}
+import org.apache.spark.sql.execution.joins.{SortMergeJoin, BroadcastHashJoin}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
@@ -97,10 +97,10 @@ class PlannerSuite extends SharedSQLContext {
           """.stripMargin).queryExecution.executedPlan
 
         val broadcastHashJoins = planned.collect { case join: BroadcastHashJoin => join }
-        val shuffledHashJoins = planned.collect { case join: ShuffledHashJoin => join }
+        val sortMergeJoins = planned.collect { case join: SortMergeJoin => join }
 
         assert(broadcastHashJoins.size === 1, "Should use broadcast hash join")
-        assert(shuffledHashJoins.isEmpty, "Should not use shuffled hash join")
+        assert(sortMergeJoins.isEmpty, "Should not use sort merge join")
       }
     }
 
@@ -150,10 +150,10 @@ class PlannerSuite extends SharedSQLContext {
         val planned = a.join(b, $"a.key" === $"b.key").queryExecution.executedPlan
 
         val broadcastHashJoins = planned.collect { case join: BroadcastHashJoin => join }
-        val shuffledHashJoins = planned.collect { case join: ShuffledHashJoin => join }
+        val sortMergeJoins = planned.collect { case join: SortMergeJoin => join }
 
         assert(broadcastHashJoins.size === 1, "Should use broadcast hash join")
-        assert(shuffledHashJoins.isEmpty, "Should not use shuffled hash join")
+        assert(sortMergeJoins.isEmpty, "Should not use sort merge join")
 
         sqlContext.clearCache()
       }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
index 066c16e535c7..2ec17146476f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/InnerJoinSuite.scala
@@ -93,20 +93,6 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
       boundCondition.map(Filter(_, broadcastHashJoin)).getOrElse(broadcastHashJoin)
     }
 
-    def makeShuffledHashJoin(
-        leftKeys: Seq[Expression],
-        rightKeys: Seq[Expression],
-        boundCondition: Option[Expression],
-        leftPlan: SparkPlan,
-        rightPlan: SparkPlan,
-        side: BuildSide) = {
-      val shuffledHashJoin =
-        execution.joins.ShuffledHashJoin(leftKeys, rightKeys, side, leftPlan, rightPlan)
-      val filteredJoin =
-        boundCondition.map(Filter(_, shuffledHashJoin)).getOrElse(shuffledHashJoin)
-      EnsureRequirements(sqlContext).apply(filteredJoin)
-    }
-
     def makeSortMergeJoin(
         leftKeys: Seq[Expression],
         rightKeys: Seq[Expression],
@@ -143,30 +129,6 @@ class InnerJoinSuite extends SparkPlanTest with SharedSQLContext {
       }
     }
 
-    test(s"$testName using ShuffledHashJoin (build=left)") {
-      extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _) =>
-        withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
-          checkAnswer2(leftRows, rightRows, (leftPlan: SparkPlan, rightPlan: SparkPlan) =>
-            makeShuffledHashJoin(
-              leftKeys, rightKeys, boundCondition, leftPlan, rightPlan, joins.BuildLeft),
-            expectedAnswer.map(Row.fromTuple),
-            sortAnswers = true)
-        }
-      }
-    }
-
-    test(s"$testName using ShuffledHashJoin (build=right)") {
-      extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _) =>
-        withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
-          checkAnswer2(leftRows, rightRows, (leftPlan: SparkPlan, rightPlan: SparkPlan) =>
-            makeShuffledHashJoin(
-              leftKeys, rightKeys, boundCondition, leftPlan, rightPlan, joins.BuildRight),
-            expectedAnswer.map(Row.fromTuple),
-            sortAnswers = true)
-        }
-      }
-    }
-
     test(s"$testName using SortMergeJoin") {
       extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _) =>
         withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/OuterJoinSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/OuterJoinSuite.scala
index 09e0237a7cc5..9c80714a9af4 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/OuterJoinSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/joins/OuterJoinSuite.scala
@@ -74,18 +74,6 @@ class OuterJoinSuite extends SparkPlanTest with SharedSQLContext {
       ExtractEquiJoinKeys.unapply(join)
     }
 
-    test(s"$testName using ShuffledHashOuterJoin") {
-      extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _) =>
-        withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "1") {
-          checkAnswer2(leftRows, rightRows, (left: SparkPlan, right: SparkPlan) =>
-            EnsureRequirements(sqlContext).apply(
-              ShuffledHashOuterJoin(leftKeys, rightKeys, joinType, boundCondition, left, right)),
-            expectedAnswer.map(Row.fromTuple),
-            sortAnswers = true)
-        }
-      }
-    }
-
     if (joinType != FullOuter) {
       test(s"$testName using BroadcastHashOuterJoin") {
         extractJoinParts().foreach { case (_, leftKeys, rightKeys, boundCondition, _, _) =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index 544c1ef303ae..486bfbbd7088 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -169,188 +169,123 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
   test("SortMergeJoin metrics") {
     // Because SortMergeJoin may skip different rows if the number of partitions is different, this
     // test should use the deterministic number of partitions.
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true") {
-      val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
-      testDataForJoin.registerTempTable("testDataForJoin")
-      withTempTable("testDataForJoin") {
-        // Assume the execution plan is
-        // ... -> SortMergeJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
-        val df = sqlContext.sql(
-          "SELECT * FROM testData2 JOIN testDataForJoin ON testData2.a = testDataForJoin.a")
-        testSparkPlanMetrics(df, 1, Map(
-          1L -> ("SortMergeJoin", Map(
-            // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
-            "number of left rows" -> 4L,
-            "number of right rows" -> 2L,
-            "number of output rows" -> 4L)))
-        )
-      }
+    val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
+    testDataForJoin.registerTempTable("testDataForJoin")
+    withTempTable("testDataForJoin") {
+      // Assume the execution plan is
+      // ... -> SortMergeJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
+      val df = sqlContext.sql(
+        "SELECT * FROM testData2 JOIN testDataForJoin ON testData2.a = testDataForJoin.a")
+      testSparkPlanMetrics(df, 1, Map(
+        1L -> ("SortMergeJoin", Map(
+          // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
+          "number of left rows" -> 4L,
+          "number of right rows" -> 2L,
+          "number of output rows" -> 4L)))
+      )
     }
   }
 
   test("SortMergeOuterJoin metrics") {
     // Because SortMergeOuterJoin may skip different rows if the number of partitions is different,
     // this test should use the deterministic number of partitions.
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true") {
-      val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
-      testDataForJoin.registerTempTable("testDataForJoin")
-      withTempTable("testDataForJoin") {
-        // Assume the execution plan is
-        // ... -> SortMergeOuterJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
-        val df = sqlContext.sql(
-          "SELECT * FROM testData2 left JOIN testDataForJoin ON testData2.a = testDataForJoin.a")
-        testSparkPlanMetrics(df, 1, Map(
-          1L -> ("SortMergeOuterJoin", Map(
-            // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
-            "number of left rows" -> 6L,
-            "number of right rows" -> 2L,
-            "number of output rows" -> 8L)))
-        )
-
-        val df2 = sqlContext.sql(
-          "SELECT * FROM testDataForJoin right JOIN testData2 ON testData2.a = testDataForJoin.a")
-        testSparkPlanMetrics(df2, 1, Map(
-          1L -> ("SortMergeOuterJoin", Map(
-            // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
-            "number of left rows" -> 2L,
-            "number of right rows" -> 6L,
-            "number of output rows" -> 8L)))
-        )
-      }
-    }
-  }
-
-  test("BroadcastHashJoin metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
-      val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key", "value")
-      // Assume the execution plan is
-      // ... -> BroadcastHashJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
-      val df = df1.join(broadcast(df2), "key")
-      testSparkPlanMetrics(df, 2, Map(
-        1L -> ("BroadcastHashJoin", Map(
-          "number of left rows" -> 2L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 2L)))
-      )
-    }
-  }
-
-  test("ShuffledHashJoin metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
-      testDataForJoin.registerTempTable("testDataForJoin")
-      withTempTable("testDataForJoin") {
-        // Assume the execution plan is
-        // ... -> ShuffledHashJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
-        val df = sqlContext.sql(
-          "SELECT * FROM testData2 JOIN testDataForJoin ON testData2.a = testDataForJoin.a")
-        testSparkPlanMetrics(df, 1, Map(
-          1L -> ("ShuffledHashJoin", Map(
-            "number of left rows" -> 6L,
-            "number of right rows" -> 2L,
-            "number of output rows" -> 4L)))
-        )
-      }
-    }
-  }
-
-  test("ShuffledHashOuterJoin metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false",
-      SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "0") {
-      val df1 = Seq((1, "a"), (1, "b"), (4, "c")).toDF("key", "value")
-      val df2 = Seq((1, "a"), (1, "b"), (2, "c"), (3, "d")).toDF("key2", "value")
+    val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
+    testDataForJoin.registerTempTable("testDataForJoin")
+    withTempTable("testDataForJoin") {
       // Assume the execution plan is
-      // ... -> ShuffledHashOuterJoin(nodeId = 0)
-      val df = df1.join(df2, $"key" === $"key2", "left_outer")
+      // ... -> SortMergeOuterJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
+      val df = sqlContext.sql(
+        "SELECT * FROM testData2 left JOIN testDataForJoin ON testData2.a = testDataForJoin.a")
       testSparkPlanMetrics(df, 1, Map(
-        0L -> ("ShuffledHashOuterJoin", Map(
-          "number of left rows" -> 3L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 5L)))
+        1L -> ("SortMergeOuterJoin", Map(
+          // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
+          "number of left rows" -> 6L,
+          "number of right rows" -> 2L,
+          "number of output rows" -> 8L)))
       )
 
-      val df3 = df1.join(df2, $"key" === $"key2", "right_outer")
-      testSparkPlanMetrics(df3, 1, Map(
-        0L -> ("ShuffledHashOuterJoin", Map(
-          "number of left rows" -> 3L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 6L)))
-      )
-
-      val df4 = df1.join(df2, $"key" === $"key2", "outer")
-      testSparkPlanMetrics(df4, 1, Map(
-        0L -> ("ShuffledHashOuterJoin", Map(
-          "number of left rows" -> 3L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 7L)))
+      val df2 = sqlContext.sql(
+        "SELECT * FROM testDataForJoin right JOIN testData2 ON testData2.a = testDataForJoin.a")
+      testSparkPlanMetrics(df2, 1, Map(
+        1L -> ("SortMergeOuterJoin", Map(
+          // It's 4 because we only read 3 rows in the first partition and 1 row in the second one
+          "number of left rows" -> 2L,
+          "number of right rows" -> 6L,
+          "number of output rows" -> 8L)))
       )
     }
   }
 
+  test("BroadcastHashJoin metrics") {
+    val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
+    val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key", "value")
+    // Assume the execution plan is
+    // ... -> BroadcastHashJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
+    val df = df1.join(broadcast(df2), "key")
+    testSparkPlanMetrics(df, 2, Map(
+      1L -> ("BroadcastHashJoin", Map(
+        "number of left rows" -> 2L,
+        "number of right rows" -> 4L,
+        "number of output rows" -> 2L)))
+    )
+  }
+
   test("BroadcastHashOuterJoin metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      val df1 = Seq((1, "a"), (1, "b"), (4, "c")).toDF("key", "value")
-      val df2 = Seq((1, "a"), (1, "b"), (2, "c"), (3, "d")).toDF("key2", "value")
-      // Assume the execution plan is
-      // ... -> BroadcastHashOuterJoin(nodeId = 0)
-      val df = df1.join(broadcast(df2), $"key" === $"key2", "left_outer")
-      testSparkPlanMetrics(df, 2, Map(
-        0L -> ("BroadcastHashOuterJoin", Map(
-          "number of left rows" -> 3L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 5L)))
-      )
+    val df1 = Seq((1, "a"), (1, "b"), (4, "c")).toDF("key", "value")
+    val df2 = Seq((1, "a"), (1, "b"), (2, "c"), (3, "d")).toDF("key2", "value")
+    // Assume the execution plan is
+    // ... -> BroadcastHashOuterJoin(nodeId = 0)
+    val df = df1.join(broadcast(df2), $"key" === $"key2", "left_outer")
+    testSparkPlanMetrics(df, 2, Map(
+      0L -> ("BroadcastHashOuterJoin", Map(
+        "number of left rows" -> 3L,
+        "number of right rows" -> 4L,
+        "number of output rows" -> 5L)))
+    )
 
-      val df3 = df1.join(broadcast(df2), $"key" === $"key2", "right_outer")
-      testSparkPlanMetrics(df3, 2, Map(
-        0L -> ("BroadcastHashOuterJoin", Map(
-          "number of left rows" -> 3L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 6L)))
-      )
-    }
+    val df3 = df1.join(broadcast(df2), $"key" === $"key2", "right_outer")
+    testSparkPlanMetrics(df3, 2, Map(
+      0L -> ("BroadcastHashOuterJoin", Map(
+        "number of left rows" -> 3L,
+        "number of right rows" -> 4L,
+        "number of output rows" -> 6L)))
+    )
   }
 
   test("BroadcastNestedLoopJoin metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true") {
-      val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
-      testDataForJoin.registerTempTable("testDataForJoin")
-      withTempTable("testDataForJoin") {
-        // Assume the execution plan is
-        // ... -> BroadcastNestedLoopJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
-        val df = sqlContext.sql(
-          "SELECT * FROM testData2 left JOIN testDataForJoin ON " +
-            "testData2.a * testDataForJoin.a != testData2.a + testDataForJoin.a")
-        testSparkPlanMetrics(df, 3, Map(
-          1L -> ("BroadcastNestedLoopJoin", Map(
-            "number of left rows" -> 12L, // left needs to be scanned twice
-            "number of right rows" -> 2L,
-            "number of output rows" -> 12L)))
-        )
-      }
+    val testDataForJoin = testData2.filter('a < 2) // TestData2(1, 1) :: TestData2(1, 2)
+    testDataForJoin.registerTempTable("testDataForJoin")
+    withTempTable("testDataForJoin") {
+      // Assume the execution plan is
+      // ... -> BroadcastNestedLoopJoin(nodeId = 1) -> TungstenProject(nodeId = 0)
+      val df = sqlContext.sql(
+        "SELECT * FROM testData2 left JOIN testDataForJoin ON " +
+          "testData2.a * testDataForJoin.a != testData2.a + testDataForJoin.a")
+      testSparkPlanMetrics(df, 3, Map(
+        1L -> ("BroadcastNestedLoopJoin", Map(
+          "number of left rows" -> 12L, // left needs to be scanned twice
+          "number of right rows" -> 2L,
+          "number of output rows" -> 12L)))
+      )
     }
   }
 
   test("BroadcastLeftSemiJoinHash metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
-      val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key2", "value")
-      // Assume the execution plan is
-      // ... -> BroadcastLeftSemiJoinHash(nodeId = 0)
-      val df = df1.join(broadcast(df2), $"key" === $"key2", "leftsemi")
-      testSparkPlanMetrics(df, 2, Map(
-        0L -> ("BroadcastLeftSemiJoinHash", Map(
-          "number of left rows" -> 2L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 2L)))
-      )
-    }
+    val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
+    val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key2", "value")
+    // Assume the execution plan is
+    // ... -> BroadcastLeftSemiJoinHash(nodeId = 0)
+    val df = df1.join(broadcast(df2), $"key" === $"key2", "leftsemi")
+    testSparkPlanMetrics(df, 2, Map(
+      0L -> ("BroadcastLeftSemiJoinHash", Map(
+        "number of left rows" -> 2L,
+        "number of right rows" -> 4L,
+        "number of output rows" -> 2L)))
+    )
   }
 
   test("LeftSemiJoinHash metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "true",
-      SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "0") {
+    withSQLConf(SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "0") {
       val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
       val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key2", "value")
       // Assume the execution plan is
@@ -366,19 +301,17 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
   }
 
   test("LeftSemiJoinBNL metrics") {
-    withSQLConf(SQLConf.SORTMERGE_JOIN.key -> "false") {
-      val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
-      val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key2", "value")
-      // Assume the execution plan is
-      // ... -> LeftSemiJoinBNL(nodeId = 0)
-      val df = df1.join(df2, $"key" < $"key2", "leftsemi")
-      testSparkPlanMetrics(df, 2, Map(
-        0L -> ("LeftSemiJoinBNL", Map(
-          "number of left rows" -> 2L,
-          "number of right rows" -> 4L,
-          "number of output rows" -> 2L)))
-      )
-    }
+    val df1 = Seq((1, "1"), (2, "2")).toDF("key", "value")
+    val df2 = Seq((1, "1"), (2, "2"), (3, "3"), (4, "4")).toDF("key2", "value")
+    // Assume the execution plan is
+    // ... -> LeftSemiJoinBNL(nodeId = 0)
+    val df = df1.join(df2, $"key" < $"key2", "leftsemi")
+    testSparkPlanMetrics(df, 2, Map(
+      0L -> ("LeftSemiJoinBNL", Map(
+        "number of left rows" -> 2L,
+        "number of right rows" -> 4L,
+        "number of output rows" -> 2L)))
+    )
   }
 
   test("CartesianProduct metrics") {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
index 9bb32f11b76b..f775f1e95587 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/StatisticsSuite.scala
@@ -166,7 +166,7 @@ class StatisticsSuite extends QueryTest with TestHiveSingleton {
 
         val shj = df.queryExecution.sparkPlan.collect { case j: SortMergeJoin => j }
         assert(shj.size === 1,
-          "ShuffledHashJoin should be planned when BroadcastHashJoin is turned off")
+          "SortMergeJoin should be planned when BroadcastHashJoin is turned off")
 
         sql(s"""SET ${SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key}=$tmp""")
       }

From 39b1e36fbc284ba999e1c00b20d1b0b5de6b40b2 Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Wed, 11 Nov 2015 20:36:21 -0800
Subject: [PATCH 642/896] [SPARK-11396] [SQL] add native implementation of
 datetime function to_unix_timestamp

`to_unix_timestamp` is the deterministic version of `unix_timestamp`, as it accepts at least one parameters.

Since the behavior here is quite similar to `unix_timestamp`, I think the dataframe API is not necessary here.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #9347 from adrian-wang/to_unix_timestamp.
---
 .../catalyst/analysis/FunctionRegistry.scala  |  1 +
 .../expressions/datetimeExpressions.scala     | 24 ++++++++++---
 .../expressions/DateExpressionsSuite.scala    | 36 +++++++++++++++++++
 .../apache/spark/sql/DateFunctionsSuite.scala | 21 +++++++++++
 4 files changed, 77 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index dfa749d1afa5..870808aa560e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -262,6 +262,7 @@ object FunctionRegistry {
     expression[Quarter]("quarter"),
     expression[Second]("second"),
     expression[ToDate]("to_date"),
+    expression[ToUnixTimestamp]("to_unix_timestamp"),
     expression[ToUTCTimestamp]("to_utc_timestamp"),
     expression[TruncDate]("trunc"),
     expression[UnixTimestamp]("unix_timestamp"),
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
index 13cc6bb6f27b..03c39f8404e7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala
@@ -299,7 +299,20 @@ case class DateFormatClass(left: Expression, right: Expression) extends BinaryEx
 }
 
 /**
- * Converts time string with given pattern
+ * Converts time string with given pattern.
+ * Deterministic version of [[UnixTimestamp]], must have at least one parameter.
+ */
+case class ToUnixTimestamp(timeExp: Expression, format: Expression) extends UnixTime {
+  override def left: Expression = timeExp
+  override def right: Expression = format
+
+  def this(time: Expression) = {
+    this(time, Literal("yyyy-MM-dd HH:mm:ss"))
+  }
+}
+
+/**
+ * Converts time string with given pattern.
  * (see [http://docs.oracle.com/javase/tutorial/i18n/format/simpleDateFormat.html])
  * to Unix time stamp (in seconds), returns null if fail.
  * Note that hive Language Manual says it returns 0 if fail, but in fact it returns null.
@@ -308,9 +321,7 @@ case class DateFormatClass(left: Expression, right: Expression) extends BinaryEx
  * If the first parameter is a Date or Timestamp instead of String, we will ignore the
  * second parameter.
  */
-case class UnixTimestamp(timeExp: Expression, format: Expression)
-  extends BinaryExpression with ExpectsInputTypes {
-
+case class UnixTimestamp(timeExp: Expression, format: Expression) extends UnixTime {
   override def left: Expression = timeExp
   override def right: Expression = format
 
@@ -321,6 +332,9 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
   def this() = {
     this(CurrentTimestamp())
   }
+}
+
+abstract class UnixTime extends BinaryExpression with ExpectsInputTypes {
 
   override def inputTypes: Seq[AbstractDataType] =
     Seq(TypeCollection(StringType, DateType, TimestampType), StringType)
@@ -347,7 +361,7 @@ case class UnixTimestamp(timeExp: Expression, format: Expression)
             null
           }
         case StringType =>
-          val f = format.eval(input)
+          val f = right.eval(input)
           if (f == null) {
             null
           } else {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala
index 610d39e8493c..53c66d8a754e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/DateExpressionsSuite.scala
@@ -465,6 +465,42 @@ class DateExpressionsSuite extends SparkFunSuite with ExpressionEvalHelper {
       UnixTimestamp(Literal("2015-07-24"), Literal("not a valid format")), null)
   }
 
+  test("to_unix_timestamp") {
+    val sdf1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
+    val fmt2 = "yyyy-MM-dd HH:mm:ss.SSS"
+    val sdf2 = new SimpleDateFormat(fmt2)
+    val fmt3 = "yy-MM-dd"
+    val sdf3 = new SimpleDateFormat(fmt3)
+    val date1 = Date.valueOf("2015-07-24")
+    checkEvaluation(
+      ToUnixTimestamp(Literal(sdf1.format(new Timestamp(0))), Literal("yyyy-MM-dd HH:mm:ss")), 0L)
+    checkEvaluation(ToUnixTimestamp(
+      Literal(sdf1.format(new Timestamp(1000000))), Literal("yyyy-MM-dd HH:mm:ss")), 1000L)
+    checkEvaluation(
+      ToUnixTimestamp(Literal(new Timestamp(1000000)), Literal("yyyy-MM-dd HH:mm:ss")), 1000L)
+    checkEvaluation(
+      ToUnixTimestamp(Literal(date1), Literal("yyyy-MM-dd HH:mm:ss")),
+      DateTimeUtils.daysToMillis(DateTimeUtils.fromJavaDate(date1)) / 1000L)
+    checkEvaluation(
+      ToUnixTimestamp(Literal(sdf2.format(new Timestamp(-1000000))), Literal(fmt2)), -1000L)
+    checkEvaluation(ToUnixTimestamp(
+      Literal(sdf3.format(Date.valueOf("2015-07-24"))), Literal(fmt3)),
+      DateTimeUtils.daysToMillis(DateTimeUtils.fromJavaDate(Date.valueOf("2015-07-24"))) / 1000L)
+    val t1 = ToUnixTimestamp(
+      CurrentTimestamp(), Literal("yyyy-MM-dd HH:mm:ss")).eval().asInstanceOf[Long]
+    val t2 = ToUnixTimestamp(
+      CurrentTimestamp(), Literal("yyyy-MM-dd HH:mm:ss")).eval().asInstanceOf[Long]
+    assert(t2 - t1 <= 1)
+    checkEvaluation(
+      ToUnixTimestamp(Literal.create(null, DateType), Literal.create(null, StringType)), null)
+    checkEvaluation(
+      ToUnixTimestamp(Literal.create(null, DateType), Literal("yyyy-MM-dd HH:mm:ss")), null)
+    checkEvaluation(ToUnixTimestamp(
+      Literal(date1), Literal.create(null, StringType)), date1.getTime / 1000L)
+    checkEvaluation(
+      ToUnixTimestamp(Literal("2015-07-24"), Literal("not a valid format")), null)
+  }
+
   test("datediff") {
     checkEvaluation(
       DateDiff(Literal(Date.valueOf("2015-07-24")), Literal(Date.valueOf("2015-07-21"))), 3)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
index 9080c53c491a..1266d534cc5b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
@@ -444,6 +444,27 @@ class DateFunctionsSuite extends QueryTest with SharedSQLContext {
       Row(ts1.getTime / 1000L), Row(ts2.getTime / 1000L)))
   }
 
+  test("to_unix_timestamp") {
+    val date1 = Date.valueOf("2015-07-24")
+    val date2 = Date.valueOf("2015-07-25")
+    val ts1 = Timestamp.valueOf("2015-07-24 10:00:00.3")
+    val ts2 = Timestamp.valueOf("2015-07-25 02:02:02.2")
+    val s1 = "2015/07/24 10:00:00.5"
+    val s2 = "2015/07/25 02:02:02.6"
+    val ss1 = "2015-07-24 10:00:00"
+    val ss2 = "2015-07-25 02:02:02"
+    val fmt = "yyyy/MM/dd HH:mm:ss.S"
+    val df = Seq((date1, ts1, s1, ss1), (date2, ts2, s2, ss2)).toDF("d", "ts", "s", "ss")
+    checkAnswer(df.selectExpr("to_unix_timestamp(ts)"), Seq(
+      Row(ts1.getTime / 1000L), Row(ts2.getTime / 1000L)))
+    checkAnswer(df.selectExpr("to_unix_timestamp(ss)"), Seq(
+      Row(ts1.getTime / 1000L), Row(ts2.getTime / 1000L)))
+    checkAnswer(df.selectExpr(s"to_unix_timestamp(d, '$fmt')"), Seq(
+      Row(date1.getTime / 1000L), Row(date2.getTime / 1000L)))
+    checkAnswer(df.selectExpr(s"to_unix_timestamp(s, '$fmt')"), Seq(
+      Row(ts1.getTime / 1000L), Row(ts2.getTime / 1000L)))
+  }
+
   test("datediff") {
     val df = Seq(
       (Date.valueOf("2015-07-24"), Timestamp.valueOf("2015-07-24 01:00:00"),

From e2957bc085d39d59c09e4b33c26a05f0263200a3 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Wed, 11 Nov 2015 21:01:14 -0800
Subject: [PATCH 643/896] [SPARK-11674][ML] add private val after @transient in
 Word2VecModel

This causes compile failure with Scala 2.11. See https://issues.scala-lang.org/browse/SI-8813. (Jenkins won't test Scala 2.11. I tested compile locally.) JoshRosen

Author: Xiangrui Meng <meng@databricks.com>

Closes #9644 from mengxr/SPARK-11674.
---
 mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
index 5c64cb09d594..708dbeef84db 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
@@ -146,7 +146,7 @@ final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel]
 @Experimental
 class Word2VecModel private[ml] (
     override val uid: String,
-    @transient wordVectors: feature.Word2VecModel)
+    @transient private val wordVectors: feature.Word2VecModel)
   extends Model[Word2VecModel] with Word2VecBase {
 
   /**

From 14cf753704ea60f358cb870b018cbcf73654f198 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Thu, 12 Nov 2015 16:47:00 +0800
Subject: [PATCH 644/896] [SPARK-11661][SQL] Still pushdown filters returned by
 unhandledFilters.

https://issues.apache.org/jira/browse/SPARK-11661

Author: Yin Huai <yhuai@databricks.com>

Closes #9634 from yhuai/unhandledFilters.
---
 .../datasources/DataSourceStrategy.scala      | 15 +++++--
 .../apache/spark/sql/sources/interfaces.scala |  8 ++--
 .../parquet/ParquetFilterSuite.scala          | 25 ++++++++++++
 .../spark/sql/sources/FilteredScanSuite.scala | 39 ++++++++++++-------
 .../SimpleTextHadoopFsRelationSuite.scala     |  8 ++--
 5 files changed, 71 insertions(+), 24 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 7265d6a4de2e..d7c01b6e6f07 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -453,8 +453,8 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
    *
    * @return A pair of `Seq[Expression]` and `Seq[Filter]`. The first element contains all Catalyst
    *         predicate [[Expression]]s that are either not convertible or cannot be handled by
-   *         `relation`. The second element contains all converted data source [[Filter]]s that can
-   *        be handled by `relation`.
+   *         `relation`. The second element contains all converted data source [[Filter]]s that
+   *         will be pushed down to the data source.
    */
   protected[sql] def selectFilters(
     relation: BaseRelation,
@@ -476,7 +476,9 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     // Catalyst predicate expressions that cannot be translated to data source filters.
     val unrecognizedPredicates = predicates.filterNot(translatedMap.contains)
 
-    // Data source filters that cannot be handled by `relation`
+    // Data source filters that cannot be handled by `relation`. The semantic of a unhandled filter
+    // at here is that a data source may not be able to apply this filter to every row
+    // of the underlying dataset.
     val unhandledFilters = relation.unhandledFilters(translatedMap.values.toArray).toSet
 
     val (unhandled, handled) = translated.partition {
@@ -491,6 +493,11 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     // Translated data source filters that can be handled by `relation`
     val (_, handledFilters) = handled.unzip
 
-    (unrecognizedPredicates ++ unhandledPredicates, handledFilters)
+    // translated contains all filters that have been converted to the public Filter interface.
+    // We should always push them to the data source no matter whether the data source can apply
+    // a filter to every row or not.
+    val (_, translatedFilters) = translated.unzip
+
+    (unrecognizedPredicates ++ unhandledPredicates, translatedFilters)
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 48de693a999d..2be6cd45337f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -235,9 +235,11 @@ abstract class BaseRelation {
   def needConversion: Boolean = true
 
   /**
-   * Given an array of [[Filter]]s, returns an array of [[Filter]]s that this data source relation
-   * cannot handle.  Spark SQL will apply all returned [[Filter]]s against rows returned by this
-   * data source relation.
+   * Returns the list of [[Filter]]s that this datasource may not be able to handle.
+   * These returned [[Filter]]s will be evaluated by Spark SQL after data is output by a scan.
+   * By default, this function will return all filters, as it is always safe to
+   * double evaluate a [[Filter]]. However, specific implementations can override this function to
+   * avoid double filtering when they are capable of processing a filter internally.
    *
    * @since 1.6.0
    */
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 579dabf73318..2ac87ad6cd03 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -336,4 +336,29 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
       }
     }
   }
+
+  test("SPARK-11661 Still pushdown filters returned by unhandledFilters") {
+    import testImplicits._
+    withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true") {
+      withTempPath { dir =>
+        val path = s"${dir.getCanonicalPath}/part=1"
+        (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(path)
+        val df = sqlContext.read.parquet(path).filter("a = 2")
+
+        // This is the source RDD without Spark-side filtering.
+        val childRDD =
+          df
+            .queryExecution
+            .executedPlan.asInstanceOf[org.apache.spark.sql.execution.Filter]
+            .child
+            .execute()
+
+        // The result should be single row.
+        // When a filter is pushed to Parquet, Parquet can apply it to every row.
+        // So, we can check the number of rows returned from the Parquet
+        // to make sure our filter pushdown work.
+        assert(childRDD.count == 1)
+      }
+    }
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
index 2cad964e55b2..398b8a1a661c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/sources/FilteredScanSuite.scala
@@ -254,7 +254,11 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext with Predic
   testPushDown("SELECT * FROM oneToTenFiltered WHERE a IN (1,3,5)", 3, Set("a", "b", "c"))
 
   testPushDown("SELECT * FROM oneToTenFiltered WHERE a = 20", 0, Set("a", "b", "c"))
-  testPushDown("SELECT * FROM oneToTenFiltered WHERE b = 1", 10, Set("a", "b", "c"))
+  testPushDown(
+    "SELECT * FROM oneToTenFiltered WHERE b = 1",
+    10,
+    Set("a", "b", "c"),
+    Set(EqualTo("b", 1)))
 
   testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 5 AND a > 1", 3, Set("a", "b", "c"))
   testPushDown("SELECT * FROM oneToTenFiltered WHERE a < 3 OR a > 8", 4, Set("a", "b", "c"))
@@ -283,12 +287,23 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext with Predic
       | WHERE a + b > 9
       |   AND b < 16
       |   AND c IN ('bbbbbBBBBB', 'cccccCCCCC', 'dddddDDDDD', 'foo')
-    """.stripMargin.split("\n").map(_.trim).mkString(" "), 3, Set("a", "b"))
+    """.stripMargin.split("\n").map(_.trim).mkString(" "),
+    3,
+    Set("a", "b"),
+    Set(LessThan("b", 16)))
 
   def testPushDown(
-      sqlString: String,
-      expectedCount: Int,
-      requiredColumnNames: Set[String]): Unit = {
+    sqlString: String,
+    expectedCount: Int,
+    requiredColumnNames: Set[String]): Unit = {
+    testPushDown(sqlString, expectedCount, requiredColumnNames, Set.empty[Filter])
+  }
+
+  def testPushDown(
+    sqlString: String,
+    expectedCount: Int,
+    requiredColumnNames: Set[String],
+    expectedUnhandledFilters: Set[Filter]): Unit = {
     test(s"PushDown Returns $expectedCount: $sqlString") {
       val queryExecution = sql(sqlString).queryExecution
       val rawPlan = queryExecution.executedPlan.collect {
@@ -300,15 +315,13 @@ class FilteredScanSuite extends DataSourceTest with SharedSQLContext with Predic
       val rawCount = rawPlan.execute().count()
       assert(ColumnsRequired.set === requiredColumnNames)
 
-      assert {
-        val table = caseInsensitiveContext.table("oneToTenFiltered")
-        val relation = table.queryExecution.logical.collectFirst {
-          case LogicalRelation(r, _) => r
-        }.get
+      val table = caseInsensitiveContext.table("oneToTenFiltered")
+      val relation = table.queryExecution.logical.collectFirst {
+        case LogicalRelation(r, _) => r
+      }.get
 
-        // `relation` should be able to handle all pushed filters
-        relation.unhandledFilters(FiltersPushed.list.toArray).isEmpty
-      }
+      assert(
+        relation.unhandledFilters(FiltersPushed.list.toArray).toSet === expectedUnhandledFilters)
 
       if (rawCount != expectedCount) {
         fail(
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
index 9251a69f31a4..81af684ba0bf 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
@@ -248,7 +248,7 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with Predicat
     projections = Seq('c, 'p),
     filter = 'a < 3 && 'p > 0,
     requiredColumns = Seq("c", "a"),
-    pushedFilters = Nil,
+    pushedFilters = Seq(LessThan("a", 3)),
     inconvertibleFilters = Nil,
     unhandledFilters = Seq('a < 3),
     partitioningFilters = Seq('p > 0)
@@ -327,7 +327,7 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with Predicat
     projections = Seq('b, 'p),
     filter = 'c > "val_7" && 'b < 18 && 'p > 0,
     requiredColumns = Seq("b"),
-    pushedFilters = Seq(GreaterThan("c", "val_7")),
+    pushedFilters = Seq(GreaterThan("c", "val_7"), LessThan("b", 18)),
     inconvertibleFilters = Nil,
     unhandledFilters = Seq('b < 18),
     partitioningFilters = Seq('p > 0)
@@ -344,7 +344,7 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with Predicat
     projections = Seq('b, 'p),
     filter = 'a % 2 === 0 && 'c > "val_7" && 'b < 18 && 'p > 0,
     requiredColumns = Seq("b", "a"),
-    pushedFilters = Seq(GreaterThan("c", "val_7")),
+    pushedFilters = Seq(GreaterThan("c", "val_7"), LessThan("b", 18)),
     inconvertibleFilters = Seq('a % 2 === 0),
     unhandledFilters = Seq('b < 18),
     partitioningFilters = Seq('p > 0)
@@ -361,7 +361,7 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with Predicat
     projections = Seq('b, 'p),
     filter = 'a > 7 && 'a < 9,
     requiredColumns = Seq("b", "a"),
-    pushedFilters = Seq(GreaterThan("a", 7)),
+    pushedFilters = Seq(GreaterThan("a", 7), LessThan("a", 9)),
     inconvertibleFilters = Nil,
     unhandledFilters = Seq('a < 9),
     partitioningFilters = Nil

From 30e743364313d4b81c99de8f9a7170f5bca2771c Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 12 Nov 2015 08:14:08 -0800
Subject: [PATCH 645/896] [SPARK-11673][SQL] Remove the normal Project physical
 operator (and keep TungstenProject)

Also make full outer join being able to produce UnsafeRows.

Author: Reynold Xin <rxin@databricks.com>

Closes #9643 from rxin/SPARK-11673.
---
 .../execution/UnsafeExternalRowSorter.java    |  7 ---
 .../scala/org/apache/spark/sql/Encoder.scala  |  8 +--
 .../spark/sql/catalyst/ScalaReflection.scala  |  6 +--
 .../expressions/EquivalentExpressions.scala   |  2 +-
 .../sql/catalyst/expressions/Projection.scala | 10 ----
 .../apache/spark/sql/execution/Exchange.scala |  5 +-
 .../spark/sql/execution/SparkPlanner.scala    |  6 +--
 .../spark/sql/execution/SparkStrategies.scala | 14 +----
 .../apache/spark/sql/execution/Window.scala   |  6 +--
 .../aggregate/SortBasedAggregate.scala        |  6 +--
 .../aggregate/TungstenAggregate.scala         |  3 +-
 .../spark/sql/execution/basicOperators.scala  | 26 ---------
 .../datasources/DataSourceStrategy.scala      |  3 +-
 .../spark/sql/execution/joins/HashJoin.scala  | 31 +++--------
 .../sql/execution/joins/HashOuterJoin.scala   | 54 +++++++------------
 .../sql/execution/joins/HashSemiJoin.scala    | 25 ++-------
 .../sql/execution/joins/SortMergeJoin.scala   | 41 +++-----------
 .../execution/joins/SortMergeOuterJoin.scala  | 38 +++----------
 .../execution/local/BinaryHashJoinNode.scala  |  6 +--
 .../sql/execution/local/HashJoinNode.scala    | 21 ++------
 .../sql/execution/rowFormatConverters.scala   | 18 ++-----
 .../org/apache/spark/sql/execution/sort.scala |  9 ----
 .../spark/sql/ColumnExpressionSuite.scala     |  3 +-
 .../sql/execution/TungstenSortSuite.scala     |  1 -
 .../execution/local/HashJoinNodeSuite.scala   | 10 +---
 .../execution/HiveTypeCoercionSuite.scala     |  6 ++-
 .../ParquetHadoopFsRelationSuite.scala        |  2 +-
 27 files changed, 80 insertions(+), 287 deletions(-)

diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
index f7063d1e5c82..3986d6e18f77 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/execution/UnsafeExternalRowSorter.java
@@ -170,13 +170,6 @@ public Iterator<UnsafeRow> sort(Iterator<UnsafeRow> inputIterator) throws IOExce
     return sort();
   }
 
-  /**
-   * Return true if UnsafeExternalRowSorter can sort rows with the given schema, false otherwise.
-   */
-  public static boolean supportsSchema(StructType schema) {
-    return UnsafeProjection.canSupport(schema);
-  }
-
   private static final class RowComparator extends RecordComparator {
     private final Ordering<InternalRow> ordering;
     private final int numFields;
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 1ff7340557e6..6134f9e03663 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -17,13 +17,13 @@
 
 package org.apache.spark.sql
 
+import scala.reflect.ClassTag
+
 import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types.{ObjectType, StructField, StructType}
 import org.apache.spark.util.Utils
 
-import scala.reflect.ClassTag
-
 /**
  * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
  *
@@ -123,9 +123,9 @@ object Encoders {
 
     new ExpressionEncoder[Any](
       schema,
-      false,
+      flat = false,
       extractExpressions,
       constructExpression,
-      ClassTag.apply(cls))
+      ClassTag(cls))
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 0b8a8abd02d6..6d822261b050 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -153,18 +153,18 @@ trait ScalaReflection {
    */
   def constructorFor[T : TypeTag]: Expression = constructorFor(typeOf[T], None)
 
-  protected def constructorFor(
+  private def constructorFor(
       tpe: `Type`,
       path: Option[Expression]): Expression = ScalaReflectionLock.synchronized {
 
     /** Returns the current path with a sub-field extracted. */
-    def addToPath(part: String) =
+    def addToPath(part: String): Expression =
       path
         .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
         .getOrElse(UnresolvedAttribute(part))
 
     /** Returns the current path with a field at ordinal extracted. */
-    def addToPathOrdinal(ordinal: Int, dataType: DataType) =
+    def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression =
       path
         .map(p => GetStructField(p, StructField(s"_$ordinal", dataType), ordinal))
         .getOrElse(BoundReference(ordinal, dataType, false))
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
index f83df494ba8a..f7162e420d19 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/EquivalentExpressions.scala
@@ -77,7 +77,7 @@ class EquivalentExpressions {
    * an empty collection if there are none.
    */
   def getEquivalentExprs(e: Expression): Seq[Expression] = {
-    equivalenceMap.get(Expr(e)).getOrElse(mutable.MutableList())
+    equivalenceMap.getOrElse(Expr(e), mutable.MutableList())
   }
 
   /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
index 9f0b7821ae74..053e612f3ecb 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Projection.scala
@@ -102,16 +102,6 @@ abstract class UnsafeProjection extends Projection {
 
 object UnsafeProjection {
 
-  /*
-   * Returns whether UnsafeProjection can support given StructType, Array[DataType] or
-   * Seq[Expression].
-   */
-  def canSupport(schema: StructType): Boolean = canSupport(schema.fields.map(_.dataType))
-  def canSupport(exprs: Seq[Expression]): Boolean = canSupport(exprs.map(_.dataType).toArray)
-  private def canSupport(types: Array[DataType]): Boolean = {
-    types.forall(GenerateUnsafeProjection.canSupport)
-  }
-
   /**
    * Returns an UnsafeProjection for given StructType.
    */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index d0e4e068092f..bc252d98e714 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -57,10 +57,7 @@ case class Exchange(
   /**
    * Returns true iff we can support the data type, and we are not doing range partitioning.
    */
-  private lazy val tungstenMode: Boolean = {
-    GenerateUnsafeProjection.canSupport(child.schema) &&
-      !newPartitioning.isInstanceOf[RangePartitioning]
-  }
+  private lazy val tungstenMode: Boolean = !newPartitioning.isInstanceOf[RangePartitioning]
 
   override def outputPartitioning: Partitioning = newPartitioning
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
index cf482ae4a05e..b7c5476346b2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
@@ -18,12 +18,10 @@
 package org.apache.spark.sql.execution
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.execution.datasources.DataSourceStrategy
 
-@Experimental
 class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
   val sparkContext: SparkContext = sqlContext.sparkContext
 
@@ -64,7 +62,7 @@ class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
 
     val projectSet = AttributeSet(projectList.flatMap(_.references))
     val filterSet = AttributeSet(filterPredicates.flatMap(_.references))
-    val filterCondition =
+    val filterCondition: Option[Expression] =
       prunePushedDownFilters(filterPredicates).reduceLeftOption(catalyst.expressions.And)
 
     // Right now we still use a projection even if the only evaluation is applying an alias
@@ -82,7 +80,7 @@ class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
       filterCondition.map(Filter(_, scan)).getOrElse(scan)
     } else {
       val scan = scanBuilder((projectSet ++ filterSet).toSeq)
-      Project(projectList, filterCondition.map(Filter(_, scan)).getOrElse(scan))
+      TungstenProject(projectList, filterCondition.map(Filter(_, scan)).getOrElse(scan))
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 90989f2cee9a..a99ae4674bb1 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -309,11 +309,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
      *               if necessary.
      */
     def getSortOperator(sortExprs: Seq[SortOrder], global: Boolean, child: SparkPlan): SparkPlan = {
-      if (TungstenSort.supportsSchema(child.schema)) {
-        execution.TungstenSort(sortExprs, global, child)
-      } else {
-        execution.Sort(sortExprs, global, child)
-      }
+      execution.TungstenSort(sortExprs, global, child)
     }
 
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
@@ -347,13 +343,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
       case logical.Sort(sortExprs, global, child) =>
         getSortOperator(sortExprs, global, planLater(child)):: Nil
       case logical.Project(projectList, child) =>
-        // If unsafe mode is enabled and we support these data types in Unsafe, use the
-        // Tungsten project. Otherwise, use the normal project.
-        if (UnsafeProjection.canSupport(projectList) && UnsafeProjection.canSupport(child.schema)) {
-          execution.TungstenProject(projectList, planLater(child)) :: Nil
-        } else {
-          execution.Project(projectList, planLater(child)) :: Nil
-        }
+        execution.TungstenProject(projectList, planLater(child)) :: Nil
       case logical.Filter(condition, child) =>
         execution.Filter(condition, planLater(child)) :: Nil
       case e @ logical.Expand(_, _, child) =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
index 53c5ccf8fa37..b1280c32a6a4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala
@@ -247,11 +247,7 @@ case class Window(
 
         // Get all relevant projections.
         val result = createResultProjection(unboundExpressions)
-        val grouping = if (child.outputsUnsafeRows) {
-          UnsafeProjection.create(partitionSpec, child.output)
-        } else {
-          newProjection(partitionSpec, child.output)
-        }
+        val grouping = UnsafeProjection.create(partitionSpec, child.output)
 
         // Manage the stream and the grouping.
         var nextRow: InternalRow = EmptyRow
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
index fb7f30c2aec9..c8ccbb933df6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
@@ -78,11 +78,9 @@ case class SortBasedAggregate(
         // so return an empty iterator.
         Iterator[InternalRow]()
       } else {
-        val groupingKeyProjection = if (UnsafeProjection.canSupport(groupingExpressions)) {
+        val groupingKeyProjection =
           UnsafeProjection.create(groupingExpressions, child.output)
-        } else {
-          newMutableProjection(groupingExpressions, child.output)()
-        }
+
         val outputIter = new SortBasedAggregationIterator(
           groupingKeyProjection,
           groupingExpressions.map(_.toAttribute),
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
index 1edde1e5a16d..920de615e1d8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
@@ -139,7 +139,6 @@ object TungstenAggregate {
     groupingExpressions: Seq[Expression],
     aggregateBufferAttributes: Seq[Attribute]): Boolean = {
     val aggregationBufferSchema = StructType.fromAttributes(aggregateBufferAttributes)
-    UnsafeFixedWidthAggregationMap.supportsAggregationBufferSchema(aggregationBufferSchema) &&
-      UnsafeProjection.canSupport(groupingExpressions)
+    UnsafeFixedWidthAggregationMap.supportsAggregationBufferSchema(aggregationBufferSchema)
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 303d636164ad..ae08fb71bf4c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -30,32 +30,6 @@ import org.apache.spark.util.random.PoissonSampler
 import org.apache.spark.{HashPartitioner, SparkEnv}
 
 
-case class Project(projectList: Seq[NamedExpression], child: SparkPlan) extends UnaryNode {
-  override def output: Seq[Attribute] = projectList.map(_.toAttribute)
-
-  override private[sql] lazy val metrics = Map(
-    "numRows" -> SQLMetrics.createLongMetric(sparkContext, "number of rows"))
-
-  @transient lazy val buildProjection = newMutableProjection(projectList, child.output)
-
-  protected override def doExecute(): RDD[InternalRow] = {
-    val numRows = longMetric("numRows")
-    child.execute().mapPartitions { iter =>
-      val reusableProjection = buildProjection()
-      iter.map { row =>
-        numRows += 1
-        reusableProjection(row)
-      }
-    }
-  }
-
-  override def outputOrdering: Seq[SortOrder] = child.outputOrdering
-}
-
-
-/**
- * A variant of [[Project]] that returns [[UnsafeRow]]s.
- */
 case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan) extends UnaryNode {
 
   override private[sql] lazy val metrics = Map(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index d7c01b6e6f07..824c89a90eb8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -343,7 +343,8 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         requestedColumns,
         scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
         relation.relation)
-      execution.Project(projects, filterCondition.map(execution.Filter(_, scan)).getOrElse(scan))
+      execution.TungstenProject(
+        projects, filterCondition.map(execution.Filter(_, scan)).getOrElse(scan))
     }
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
index 997f7f494f4a..fb961d97c3c3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashJoin.scala
@@ -44,27 +44,15 @@ trait HashJoin {
 
   override def output: Seq[Attribute] = left.output ++ right.output
 
-  protected[this] def isUnsafeMode: Boolean = {
-    UnsafeProjection.canSupport(buildKeys) && UnsafeProjection.canSupport(self.schema)
-  }
-
-  override def outputsUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessSafeRows: Boolean = !isUnsafeMode
+  override def outputsUnsafeRows: Boolean = true
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = false
 
   protected def buildSideKeyGenerator: Projection =
-    if (isUnsafeMode) {
-      UnsafeProjection.create(buildKeys, buildPlan.output)
-    } else {
-      newMutableProjection(buildKeys, buildPlan.output)()
-    }
+    UnsafeProjection.create(buildKeys, buildPlan.output)
 
   protected def streamSideKeyGenerator: Projection =
-    if (isUnsafeMode) {
-      UnsafeProjection.create(streamedKeys, streamedPlan.output)
-    } else {
-      newMutableProjection(streamedKeys, streamedPlan.output)()
-    }
+    UnsafeProjection.create(streamedKeys, streamedPlan.output)
 
   protected def hashJoin(
       streamIter: Iterator[InternalRow],
@@ -79,13 +67,8 @@ trait HashJoin {
 
       // Mutable per row objects.
       private[this] val joinRow = new JoinedRow
-      private[this] val resultProjection: (InternalRow) => InternalRow = {
-        if (isUnsafeMode) {
-          UnsafeProjection.create(self.schema)
-        } else {
-          identity[InternalRow]
-        }
-      }
+      private[this] val resultProjection: (InternalRow) => InternalRow =
+        UnsafeProjection.create(self.schema)
 
       private[this] val joinKeys = streamSideKeyGenerator
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
index 3633f356b014..ed626fef56af 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashOuterJoin.scala
@@ -64,38 +64,18 @@ trait HashOuterJoin {
         s"HashOuterJoin should not take $x as the JoinType")
   }
 
-  protected[this] def isUnsafeMode: Boolean = {
-    joinType != FullOuter &&
-      UnsafeProjection.canSupport(buildKeys) &&
-      UnsafeProjection.canSupport(self.schema)
-  }
-
-  override def outputsUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessSafeRows: Boolean = !isUnsafeMode
+  override def outputsUnsafeRows: Boolean = true
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = false
 
   protected def buildKeyGenerator: Projection =
-    if (isUnsafeMode) {
-      UnsafeProjection.create(buildKeys, buildPlan.output)
-    } else {
-      newMutableProjection(buildKeys, buildPlan.output)()
-    }
+    UnsafeProjection.create(buildKeys, buildPlan.output)
 
-  protected[this] def streamedKeyGenerator: Projection = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(streamedKeys, streamedPlan.output)
-    } else {
-      newProjection(streamedKeys, streamedPlan.output)
-    }
-  }
+  protected[this] def streamedKeyGenerator: Projection =
+    UnsafeProjection.create(streamedKeys, streamedPlan.output)
 
-  protected[this] def resultProjection: InternalRow => InternalRow = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(self.schema)
-    } else {
-      identity[InternalRow]
-    }
-  }
+  protected[this] def resultProjection: InternalRow => InternalRow =
+    UnsafeProjection.create(self.schema)
 
   @transient private[this] lazy val DUMMY_LIST = CompactBuffer[InternalRow](null)
   @transient protected[this] lazy val EMPTY_LIST = CompactBuffer[InternalRow]()
@@ -173,8 +153,12 @@ trait HashOuterJoin {
   }
 
   protected[this] def fullOuterIterator(
-      key: InternalRow, leftIter: Iterable[InternalRow], rightIter: Iterable[InternalRow],
-      joinedRow: JoinedRow, numOutputRows: LongSQLMetric): Iterator[InternalRow] = {
+      key: InternalRow,
+      leftIter: Iterable[InternalRow],
+      rightIter: Iterable[InternalRow],
+      joinedRow: JoinedRow,
+      resultProjection: InternalRow => InternalRow,
+      numOutputRows: LongSQLMetric): Iterator[InternalRow] = {
     if (!key.anyNull) {
       // Store the positions of records in right, if one of its associated row satisfy
       // the join condition.
@@ -191,7 +175,7 @@ trait HashOuterJoin {
             matched = true
             // if the row satisfy the join condition, add its index into the matched set
             rightMatchedSet.add(idx)
-            joinedRow.copy()
+            resultProjection(joinedRow)
 
         } ++ DUMMY_LIST.filter(_ => !matched).map( _ => {
           // 2. For those unmatched records in left, append additional records with empty right.
@@ -201,7 +185,7 @@ trait HashOuterJoin {
           // of the records in right side.
           // If we didn't get any proper row, then append a single row with empty right.
           numOutputRows += 1
-          joinedRow.withRight(rightNullRow).copy()
+          resultProjection(joinedRow.withRight(rightNullRow))
         })
       } ++ rightIter.zipWithIndex.collect {
         // 3. For those unmatched records in right, append additional records with empty left.
@@ -210,15 +194,15 @@ trait HashOuterJoin {
         // in the matched set.
         case (r, idx) if !rightMatchedSet.contains(idx) =>
           numOutputRows += 1
-          joinedRow(leftNullRow, r).copy()
+          resultProjection(joinedRow(leftNullRow, r))
       }
     } else {
       leftIter.iterator.map[InternalRow] { l =>
         numOutputRows += 1
-        joinedRow(l, rightNullRow).copy()
+        resultProjection(joinedRow(l, rightNullRow))
       } ++ rightIter.iterator.map[InternalRow] { r =>
         numOutputRows += 1
-        joinedRow(leftNullRow, r).copy()
+        resultProjection(joinedRow(leftNullRow, r))
       }
     }
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
index c7d13e0a72a8..f23a1830e91c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashSemiJoin.scala
@@ -33,30 +33,15 @@ trait HashSemiJoin {
 
   override def output: Seq[Attribute] = left.output
 
-  protected[this] def supportUnsafe: Boolean = {
-    UnsafeProjection.canSupport(leftKeys) &&
-      UnsafeProjection.canSupport(rightKeys) &&
-      UnsafeProjection.canSupport(left.schema) &&
-      UnsafeProjection.canSupport(right.schema)
-  }
-
-  override def outputsUnsafeRows: Boolean = supportUnsafe
-  override def canProcessUnsafeRows: Boolean = supportUnsafe
-  override def canProcessSafeRows: Boolean = !supportUnsafe
+  override def outputsUnsafeRows: Boolean = true
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = false
 
   protected def leftKeyGenerator: Projection =
-    if (supportUnsafe) {
-      UnsafeProjection.create(leftKeys, left.output)
-    } else {
-      newMutableProjection(leftKeys, left.output)()
-    }
+    UnsafeProjection.create(leftKeys, left.output)
 
   protected def rightKeyGenerator: Projection =
-    if (supportUnsafe) {
-      UnsafeProjection.create(rightKeys, right.output)
-    } else {
-      newMutableProjection(rightKeys, right.output)()
-    }
+    UnsafeProjection.create(rightKeys, right.output)
 
   @transient private lazy val boundCondition =
     newPredicate(condition.getOrElse(Literal(true)), left.output ++ right.output)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
index 7aee8e3dd3fc..4bf7b521c77d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoin.scala
@@ -53,15 +53,9 @@ case class SortMergeJoin(
   override def requiredChildOrdering: Seq[Seq[SortOrder]] =
     requiredOrders(leftKeys) :: requiredOrders(rightKeys) :: Nil
 
-  protected[this] def isUnsafeMode: Boolean = {
-    UnsafeProjection.canSupport(leftKeys) &&
-      UnsafeProjection.canSupport(rightKeys) &&
-      UnsafeProjection.canSupport(schema)
-  }
-
-  override def outputsUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessSafeRows: Boolean = !isUnsafeMode
+  override def outputsUnsafeRows: Boolean = true
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = false
 
   private def requiredOrders(keys: Seq[Expression]): Seq[SortOrder] = {
     // This must be ascending in order to agree with the `keyOrdering` defined in `doExecute()`.
@@ -76,26 +70,10 @@ case class SortMergeJoin(
     left.execute().zipPartitions(right.execute()) { (leftIter, rightIter) =>
       new RowIterator {
         // The projection used to extract keys from input rows of the left child.
-        private[this] val leftKeyGenerator = {
-          if (isUnsafeMode) {
-            // It is very important to use UnsafeProjection if input rows are UnsafeRows.
-            // Otherwise, GenerateProjection will cause wrong results.
-            UnsafeProjection.create(leftKeys, left.output)
-          } else {
-            newProjection(leftKeys, left.output)
-          }
-        }
+        private[this] val leftKeyGenerator = UnsafeProjection.create(leftKeys, left.output)
 
         // The projection used to extract keys from input rows of the right child.
-        private[this] val rightKeyGenerator = {
-          if (isUnsafeMode) {
-            // It is very important to use UnsafeProjection if input rows are UnsafeRows.
-            // Otherwise, GenerateProjection will cause wrong results.
-            UnsafeProjection.create(rightKeys, right.output)
-          } else {
-            newProjection(rightKeys, right.output)
-          }
-        }
+        private[this] val rightKeyGenerator = UnsafeProjection.create(rightKeys, right.output)
 
         // An ordering that can be used to compare keys from both sides.
         private[this] val keyOrdering = newNaturalAscendingOrdering(leftKeys.map(_.dataType))
@@ -112,13 +90,8 @@ case class SortMergeJoin(
           numRightRows
         )
         private[this] val joinRow = new JoinedRow
-        private[this] val resultProjection: (InternalRow) => InternalRow = {
-          if (isUnsafeMode) {
-            UnsafeProjection.create(schema)
-          } else {
-            identity[InternalRow]
-          }
-        }
+        private[this] val resultProjection: (InternalRow) => InternalRow =
+          UnsafeProjection.create(schema)
 
         override def advanceNext(): Boolean = {
           if (currentMatchIdx == -1 || currentMatchIdx == currentRightMatches.length) {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
index 5f1590c46383..efaa69c1d322 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeOuterJoin.scala
@@ -89,31 +89,15 @@ case class SortMergeOuterJoin(
     keys.map(SortOrder(_, Ascending))
   }
 
-  private def isUnsafeMode: Boolean = {
-    UnsafeProjection.canSupport(leftKeys) &&
-      UnsafeProjection.canSupport(rightKeys) &&
-      UnsafeProjection.canSupport(schema)
-  }
-
-  override def outputsUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessUnsafeRows: Boolean = isUnsafeMode
-  override def canProcessSafeRows: Boolean = !isUnsafeMode
+  override def outputsUnsafeRows: Boolean = true
+  override def canProcessUnsafeRows: Boolean = true
+  override def canProcessSafeRows: Boolean = false
 
-  private def createLeftKeyGenerator(): Projection = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(leftKeys, left.output)
-    } else {
-      newProjection(leftKeys, left.output)
-    }
-  }
+  private def createLeftKeyGenerator(): Projection =
+    UnsafeProjection.create(leftKeys, left.output)
 
-  private def createRightKeyGenerator(): Projection = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(rightKeys, right.output)
-    } else {
-      newProjection(rightKeys, right.output)
-    }
-  }
+  private def createRightKeyGenerator(): Projection =
+    UnsafeProjection.create(rightKeys, right.output)
 
   override def doExecute(): RDD[InternalRow] = {
     val numLeftRows = longMetric("numLeftRows")
@@ -130,13 +114,7 @@ case class SortMergeOuterJoin(
           (r: InternalRow) => true
         }
       }
-      val resultProj: InternalRow => InternalRow = {
-        if (isUnsafeMode) {
-          UnsafeProjection.create(schema)
-        } else {
-          identity[InternalRow]
-        }
-      }
+      val resultProj: InternalRow => InternalRow = UnsafeProjection.create(schema)
 
       joinType match {
         case LeftOuter =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
index 52dcb9e43c4e..3dcef9409564 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/BinaryHashJoinNode.scala
@@ -50,11 +50,7 @@ case class BinaryHashJoinNode(
   private def buildSideKeyGenerator: Projection = {
     // We are expecting the data types of buildKeys and streamedKeys are the same.
     assert(buildKeys.map(_.dataType) == streamedKeys.map(_.dataType))
-    if (isUnsafeMode) {
-      UnsafeProjection.create(buildKeys, buildNode.output)
-    } else {
-      newMutableProjection(buildKeys, buildNode.output)()
-    }
+    UnsafeProjection.create(buildKeys, buildNode.output)
   }
 
   protected override def doOpen(): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
index aef655727fbb..fd7948ffa9a9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/local/HashJoinNode.scala
@@ -45,17 +45,8 @@ trait HashJoinNode {
   private[this] var hashed: HashedRelation = _
   private[this] var joinKeys: Projection = _
 
-  protected def isUnsafeMode: Boolean = {
-    UnsafeProjection.canSupport(schema) && UnsafeProjection.canSupport(streamedKeys)
-  }
-
-  private def streamSideKeyGenerator: Projection = {
-    if (isUnsafeMode) {
-      UnsafeProjection.create(streamedKeys, streamedNode.output)
-    } else {
-      newMutableProjection(streamedKeys, streamedNode.output)()
-    }
-  }
+  private def streamSideKeyGenerator: Projection =
+    UnsafeProjection.create(streamedKeys, streamedNode.output)
 
   /**
    * Sets the HashedRelation used by this node. This method needs to be called after
@@ -73,13 +64,7 @@ trait HashJoinNode {
   override def open(): Unit = {
     doOpen()
     joinRow = new JoinedRow
-    resultProjection = {
-      if (isUnsafeMode) {
-        UnsafeProjection.create(schema)
-      } else {
-        identity[InternalRow]
-      }
-    }
+    resultProjection = UnsafeProjection.create(schema)
     joinKeys = streamSideKeyGenerator
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
index 0e601cd2cab5..5f8fc2de8b46 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/rowFormatConverters.scala
@@ -28,8 +28,6 @@ import org.apache.spark.sql.catalyst.rules.Rule
  */
 case class ConvertToUnsafe(child: SparkPlan) extends UnaryNode {
 
-  require(UnsafeProjection.canSupport(child.schema), s"Cannot convert ${child.schema} to Unsafe")
-
   override def output: Seq[Attribute] = child.output
   override def outputPartitioning: Partitioning = child.outputPartitioning
   override def outputOrdering: Seq[SortOrder] = child.outputOrdering
@@ -97,18 +95,10 @@ private[sql] object EnsureRowFormats extends Rule[SparkPlan] {
     case operator: SparkPlan if handlesBothSafeAndUnsafeRows(operator) =>
       if (operator.children.map(_.outputsUnsafeRows).toSet.size != 1) {
         // If this operator's children produce both unsafe and safe rows,
-        // convert everything unsafe rows if all the schema of them are support by UnsafeRow
-        if (operator.children.forall(c => UnsafeProjection.canSupport(c.schema))) {
-          operator.withNewChildren {
-            operator.children.map {
-              c => if (!c.outputsUnsafeRows) ConvertToUnsafe(c) else c
-            }
-          }
-        } else {
-          operator.withNewChildren {
-            operator.children.map {
-              c => if (c.outputsUnsafeRows) ConvertToSafe(c) else c
-            }
+        // convert everything unsafe rows.
+        operator.withNewChildren {
+          operator.children.map {
+            c => if (!c.outputsUnsafeRows) ConvertToUnsafe(c) else c
           }
         }
       } else {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index 1a3832a698b6..47fe70ab154e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -145,12 +145,3 @@ case class TungstenSort(
   }
 
 }
-
-object TungstenSort {
-  /**
-   * Return true if UnsafeExternalSort can sort rows with the given schema, false otherwise.
-   */
-  def supportsSchema(schema: StructType): Boolean = {
-    UnsafeExternalRowSorter.supportsSchema(schema)
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
index fa559c9c6400..010df2a34158 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql
 import org.apache.spark.sql.catalyst.expressions.NamedExpression
 import org.scalatest.Matchers._
 
-import org.apache.spark.sql.execution.{Project, TungstenProject}
+import org.apache.spark.sql.execution.TungstenProject
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
@@ -615,7 +615,6 @@ class ColumnExpressionSuite extends QueryTest with SharedSQLContext {
 
     def checkNumProjects(df: DataFrame, expectedNumProjects: Int): Unit = {
       val projects = df.queryExecution.executedPlan.collect {
-        case project: Project => project
         case tungstenProject: TungstenProject => tungstenProject
       }
       assert(projects.size === expectedNumProjects)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
index 85486c08894c..7c860d1d58d5 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
@@ -74,7 +74,6 @@ class TungstenSortSuite extends SparkPlanTest with SharedSQLContext {
         sparkContext.parallelize(Random.shuffle(inputData).map(v => Row(v))),
         StructType(StructField("a", dataType, nullable = true) :: Nil)
       )
-      assert(TungstenSort.supportsSchema(inputDf.schema))
       checkThatPlansAgree(
         inputDf,
         plan => ConvertToSafe(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
index 44b0d9d4102a..c30327185e16 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/HashJoinNodeSuite.scala
@@ -42,15 +42,7 @@ class HashJoinNodeSuite extends LocalNodeTest {
       buildKeys: Seq[Expression],
       buildNode: LocalNode): HashedRelation = {
 
-    val isUnsafeMode = UnsafeProjection.canSupport(buildKeys)
-
-    val buildSideKeyGenerator =
-      if (isUnsafeMode) {
-        UnsafeProjection.create(buildKeys, buildNode.output)
-      } else {
-        new InterpretedMutableProjection(buildKeys, buildNode.output)
-      }
-
+    val buildSideKeyGenerator = UnsafeProjection.create(buildKeys, buildNode.output)
     buildNode.prepare()
     buildNode.open()
     val hashedRelation = HashedRelation(buildNode, buildSideKeyGenerator)
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
index 197e9bfb02c4..4cf4e1389029 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.hive.execution
 
 import org.apache.spark.sql.catalyst.expressions.{Cast, EqualTo}
-import org.apache.spark.sql.execution.Project
+import org.apache.spark.sql.execution.TungstenProject
 import org.apache.spark.sql.hive.test.TestHive
 
 /**
@@ -43,7 +43,9 @@ class HiveTypeCoercionSuite extends HiveComparisonTest {
 
   test("[SPARK-2210] boolean cast on boolean value should be removed") {
     val q = "select cast(cast(key=0 as boolean) as boolean) from src"
-    val project = TestHive.sql(q).queryExecution.executedPlan.collect { case e: Project => e }.head
+    val project = TestHive.sql(q).queryExecution.executedPlan.collect {
+      case e: TungstenProject => e
+    }.head
 
     // No cast expression introduced
     project.transformAllExpressions { case c: Cast =>
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
index e866493ee6c9..b6db6225805a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
@@ -151,7 +151,7 @@ class ParquetHadoopFsRelationSuite extends HadoopFsRelationTest {
       val df = sqlContext.read.parquet(path).filter('a === 0).select('b)
       val physicalPlan = df.queryExecution.executedPlan
 
-      assert(physicalPlan.collect { case p: execution.Project => p }.length === 1)
+      assert(physicalPlan.collect { case p: execution.TungstenProject => p }.length === 1)
       assert(physicalPlan.collect { case p: execution.Filter => p }.length === 1)
     }
   }

From 08660a0bc903a87b72f8ffd8b9b02fd7ee379cf7 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Thu, 12 Nov 2015 17:23:24 +0100
Subject: [PATCH 646/896] [BUILD][MINOR] Remove non-exist yarnStable module in
 Sbt project

Remove some old yarn related building codes, please review, thanks a lot.

Author: jerryshao <sshao@hortonworks.com>

Closes #9625 from jerryshao/remove-old-module.
---
 project/SparkBuild.scala | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 570c9e50ed1f..67724c4e9e41 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -42,9 +42,9 @@ object BuildCommons {
       "streaming-flume", "streaming-kafka", "streaming-mqtt", "streaming-twitter",
       "streaming-zeromq", "launcher", "unsafe", "test-tags").map(ProjectRef(buildLocation, _))
 
-  val optionallyEnabledProjects@Seq(yarn, yarnStable, java8Tests, sparkGangliaLgpl,
+  val optionallyEnabledProjects@Seq(yarn, java8Tests, sparkGangliaLgpl,
     streamingKinesisAsl, dockerIntegrationTests) =
-    Seq("yarn", "yarn-stable", "java8-tests", "ganglia-lgpl", "streaming-kinesis-asl",
+    Seq("yarn", "java8-tests", "ganglia-lgpl", "streaming-kinesis-asl",
       "docker-integration-tests").map(ProjectRef(buildLocation, _))
 
   val assemblyProjects@Seq(assembly, examples, networkYarn, streamingFlumeAssembly, streamingKafkaAssembly, streamingMqttAssembly, streamingKinesisAslAssembly) =
@@ -72,7 +72,6 @@ object SparkBuild extends PomBuild {
   // Provides compatibility for older versions of the Spark build
   def backwardCompatibility = {
     import scala.collection.mutable
-    var isAlphaYarn = false
     var profiles: mutable.Seq[String] = mutable.Seq("sbt")
     // scalastyle:off println
     if (Properties.envOrNone("SPARK_GANGLIA_LGPL").isDefined) {
@@ -85,7 +84,6 @@ object SparkBuild extends PomBuild {
     }
     Properties.envOrNone("SPARK_HADOOP_VERSION") match {
       case Some(v) =>
-        if (v.matches("0.23.*")) isAlphaYarn = true
         println("NOTE: SPARK_HADOOP_VERSION is deprecated, please use -Dhadoop.version=" + v)
         System.setProperty("hadoop.version", v)
       case None =>

From df0e318152165c8e50793aff13aaca5d2d9b8b9d Mon Sep 17 00:00:00 2001
From: Gaurav Kumar <gauravkumar37@gmail.com>
Date: Thu, 12 Nov 2015 12:14:00 -0800
Subject: [PATCH 647/896] Fixed error in scaladoc of convertToCanonicalEdges

The code convertToCanonicalEdges is such that srcIds are smaller than dstIds but the scaladoc suggested otherwise. Have fixed the same.

Author: Gaurav Kumar <gauravkumar37@gmail.com>

Closes #9666 from gauravkumar37/patch-1.
---
 graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala b/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
index 9451ff1e5c0e..9827dfab8684 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/GraphOps.scala
@@ -282,7 +282,7 @@ class GraphOps[VD: ClassTag, ED: ClassTag](graph: Graph[VD, ED]) extends Seriali
    * Convert bi-directional edges into uni-directional ones.
    * Some graph algorithms (e.g., TriangleCount) assume that an input graph
    * has its edges in canonical direction.
-   * This function rewrites the vertex ids of edges so that srcIds are bigger
+   * This function rewrites the vertex ids of edges so that srcIds are smaller
    * than dstIds, and merges the duplicated edges.
    *
    * @param mergeFunc the user defined reduce function which should

From 4fe99c72c60646b1372bb2c089c6fc7c4fa11644 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Thu, 12 Nov 2015 12:17:51 -0800
Subject: [PATCH 648/896] [SPARK-11191][SQL] Looks up temporary function using
 execution Hive client

When looking up Hive temporary functions, we should always use the `SessionState` within the execution Hive client, since temporary functions are registered there.

Author: Cheng Lian <lian@databricks.com>

Closes #9664 from liancheng/spark-11191.fix-temp-function.
---
 .../HiveThriftServer2Suites.scala             | 45 +++++++++++++++++++
 .../apache/spark/sql/hive/HiveContext.scala   |  2 +-
 .../org/apache/spark/sql/hive/hiveUDFs.scala  | 14 ++++--
 3 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index 5903b9e71cdd..eb1895f263d7 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -463,6 +463,51 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
       assert(conf.get("spark.sql.hive.version") === Some("1.2.1"))
     }
   }
+
+  test("SPARK-11595 ADD JAR with input path having URL scheme") {
+    withJdbcStatement { statement =>
+      val jarPath = "../hive/src/test/resources/TestUDTF.jar"
+      val jarURL = s"file://${System.getProperty("user.dir")}/$jarPath"
+
+      Seq(
+        s"ADD JAR $jarURL",
+        s"""CREATE TEMPORARY FUNCTION udtf_count2
+           |AS 'org.apache.spark.sql.hive.execution.GenericUDTFCount2'
+         """.stripMargin
+      ).foreach(statement.execute)
+
+      val rs1 = statement.executeQuery("DESCRIBE FUNCTION udtf_count2")
+
+      assert(rs1.next())
+      assert(rs1.getString(1) === "Function: udtf_count2")
+
+      assert(rs1.next())
+      assertResult("Class: org.apache.spark.sql.hive.execution.GenericUDTFCount2") {
+        rs1.getString(1)
+      }
+
+      assert(rs1.next())
+      assert(rs1.getString(1) === "Usage: To be added.")
+
+      val dataPath = "../hive/src/test/resources/data/files/kv1.txt"
+
+      Seq(
+        s"CREATE TABLE test_udtf(key INT, value STRING)",
+        s"LOAD DATA LOCAL INPATH '$dataPath' OVERWRITE INTO TABLE test_udtf"
+      ).foreach(statement.execute)
+
+      val rs2 = statement.executeQuery(
+        "SELECT key, cc FROM test_udtf LATERAL VIEW udtf_count2(value) dd AS cc")
+
+      assert(rs2.next())
+      assert(rs2.getInt(1) === 97)
+      assert(rs2.getInt(2) === 500)
+
+      assert(rs2.next())
+      assert(rs2.getInt(1) === 97)
+      assert(rs2.getInt(2) === 500)
+    }
+  }
 }
 
 class HiveThriftHttpServerSuite extends HiveThriftJdbcTest {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index ba6204633b9c..0c473799cc99 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -454,7 +454,7 @@ class HiveContext private[hive](
   // Note that HiveUDFs will be overridden by functions registered in this context.
   @transient
   override protected[sql] lazy val functionRegistry: FunctionRegistry =
-    new HiveFunctionRegistry(FunctionRegistry.builtin.copy()) {
+    new HiveFunctionRegistry(FunctionRegistry.builtin.copy(), this) {
       override def lookupFunction(name: String, children: Seq[Expression]): Expression = {
         // Hive Registry need current database to lookup function
         // TODO: the current database of executionHive should be consistent with metadataHive
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index a9db70119d01..e6fe2ad5f23b 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -46,17 +46,23 @@ import org.apache.spark.sql.hive.HiveShim._
 import org.apache.spark.sql.types._
 
 
-private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
+private[hive] class HiveFunctionRegistry(
+    underlying: analysis.FunctionRegistry,
+    hiveContext: HiveContext)
   extends analysis.FunctionRegistry with HiveInspectors {
 
-  def getFunctionInfo(name: String): FunctionInfo = FunctionRegistry.getFunctionInfo(name)
+  def getFunctionInfo(name: String): FunctionInfo = {
+    hiveContext.executionHive.withHiveState {
+      FunctionRegistry.getFunctionInfo(name)
+    }
+  }
 
   override def lookupFunction(name: String, children: Seq[Expression]): Expression = {
     Try(underlying.lookupFunction(name, children)).getOrElse {
       // We only look it up to see if it exists, but do not include it in the HiveUDF since it is
       // not always serializable.
       val functionInfo: FunctionInfo =
-        Option(FunctionRegistry.getFunctionInfo(name.toLowerCase)).getOrElse(
+        Option(getFunctionInfo(name.toLowerCase)).getOrElse(
           throw new AnalysisException(s"undefined function $name"))
 
       val functionClassName = functionInfo.getFunctionClass.getName
@@ -110,7 +116,7 @@ private[hive] class HiveFunctionRegistry(underlying: analysis.FunctionRegistry)
   override def lookupFunction(name: String): Option[ExpressionInfo] = {
     underlying.lookupFunction(name).orElse(
     Try {
-      val info = FunctionRegistry.getFunctionInfo(name)
+      val info = getFunctionInfo(name)
       val annotation = info.getFunctionClass.getAnnotation(classOf[Description])
       if (annotation != null) {
         Some(new ExpressionInfo(

From f5a9526fec284cccd0755d190c91e8d9999f7877 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Thu, 12 Nov 2015 12:29:50 -0800
Subject: [PATCH 649/896] [SPARK-10113][SQL] Explicit error message for
 unsigned Parquet logical types

Parquet supports some unsigned datatypes. However, Since Spark does not support unsigned datatypes, it needs to emit an exception with a clear message rather then with the one saying illegal datatype.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #9646 from HyukjinKwon/SPARK-10113.
---
 .../parquet/CatalystSchemaConverter.scala     |  7 ++++++
 .../datasources/parquet/ParquetIOSuite.scala  | 24 +++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
index 7f3394c20ed3..f28a18e2756e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
@@ -108,6 +108,9 @@ private[parquet] class CatalystSchemaConverter(
     def typeString =
       if (originalType == null) s"$typeName" else s"$typeName ($originalType)"
 
+    def typeNotSupported() =
+      throw new AnalysisException(s"Parquet type not supported: $typeString")
+
     def typeNotImplemented() =
       throw new AnalysisException(s"Parquet type not yet supported: $typeString")
 
@@ -142,6 +145,9 @@ private[parquet] class CatalystSchemaConverter(
           case INT_32 | null => IntegerType
           case DATE => DateType
           case DECIMAL => makeDecimalType(MAX_PRECISION_FOR_INT32)
+          case UINT_8 => typeNotSupported()
+          case UINT_16 => typeNotSupported()
+          case UINT_32 => typeNotSupported()
           case TIME_MILLIS => typeNotImplemented()
           case _ => illegalType()
         }
@@ -150,6 +156,7 @@ private[parquet] class CatalystSchemaConverter(
         originalType match {
           case INT_64 | null => LongType
           case DECIMAL => makeDecimalType(MAX_PRECISION_FOR_INT64)
+          case UINT_64 => typeNotSupported()
           case TIMESTAMP_MILLIS => typeNotImplemented()
           case _ => illegalType()
         }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 72744799897b..82a42d68fedc 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -206,6 +206,30 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
+  test("SPARK-10113 Support for unsigned Parquet logical types") {
+    val parquetSchema = MessageTypeParser.parseMessageType(
+      """message root {
+        |  required int32 c(UINT_32);
+        |}
+      """.stripMargin)
+
+    withTempPath { location =>
+      val extraMetadata = Map.empty[String, String].asJava
+      val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, "Spark")
+      val path = new Path(location.getCanonicalPath)
+      val footer = List(
+        new Footer(path, new ParquetMetadata(fileMetadata, Collections.emptyList()))
+      ).asJava
+
+      ParquetFileWriter.writeMetadataFile(sparkContext.hadoopConfiguration, path, footer)
+
+      val errorMessage = intercept[Throwable] {
+        sqlContext.read.parquet(path.toString).printSchema()
+      }.toString
+      assert(errorMessage.contains("Parquet type not supported"))
+    }
+  }
+
   test("compression codec") {
     def compressionCodecFor(path: String, codecName: String): String = {
       val codecs = for {

From d292f74831de7e69c852ed26d9c15df85b4fb568 Mon Sep 17 00:00:00 2001
From: JihongMa <linlin200605@gmail.com>
Date: Thu, 12 Nov 2015 13:47:34 -0800
Subject: [PATCH 650/896] [SPARK-11420] Updating Stddev support via Imperative
 Aggregate

switched stddev support from DeclarativeAggregate to ImperativeAggregate.

Author: JihongMa <linlin200605@gmail.com>

Closes #9380 from JihongMA/SPARK-11420.
---
 R/pkg/inst/tests/test_sparkSQL.R              |   4 +-
 python/pyspark/sql/dataframe.py               |   2 +-
 .../catalyst/analysis/HiveTypeCoercion.scala  |   6 +-
 .../expressions/aggregate/Kurtosis.scala      |   4 +-
 .../expressions/aggregate/Skewness.scala      |   4 +-
 .../expressions/aggregate/Stddev.scala        | 128 +++++-------------
 .../org/apache/spark/sql/functions.scala      |   2 +-
 .../spark/sql/DataFrameAggregateSuite.scala   |   4 +-
 .../org/apache/spark/sql/DataFrameSuite.scala |   2 +-
 .../org/apache/spark/sql/SQLQuerySuite.scala  |  11 +-
 10 files changed, 52 insertions(+), 115 deletions(-)

diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 9e453a1e7c2f..af024e6183a3 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -1007,7 +1007,7 @@ test_that("group by, agg functions", {
   df3 <- agg(gd, age = "stddev")
   expect_is(df3, "DataFrame")
   df3_local <- collect(df3)
-  expect_equal(0, df3_local[df3_local$name == "Andy",][1, 2])
+  expect_true(is.nan(df3_local[df3_local$name == "Andy",][1, 2]))
 
   df4 <- agg(gd, sumAge = sum(df$age))
   expect_is(df4, "DataFrame")
@@ -1038,7 +1038,7 @@ test_that("group by, agg functions", {
   df7 <- agg(gd2, value = "stddev")
   df7_local <- collect(df7)
   expect_true(abs(df7_local[df7_local$name == "ID1",][1, 2] - 6.928203) < 1e-6)
-  expect_equal(0, df7_local[df7_local$name == "ID2",][1, 2])
+  expect_true(is.nan(df7_local[df7_local$name == "ID2",][1, 2]))
 
   mockLines3 <- c("{\"name\":\"Andy\", \"age\":30}",
                   "{\"name\":\"Andy\", \"age\":30}",
diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index 0dd75ba7ca82..ad6ad0235a90 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -761,7 +761,7 @@ def describe(self, *cols):
         +-------+------------------+-----+
         |  count|                 2|    2|
         |   mean|               3.5| null|
-        | stddev|2.1213203435596424| null|
+        | stddev|2.1213203435596424|  NaN|
         |    min|                 2|Alice|
         |    max|                 5|  Bob|
         +-------+------------------+-----+
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index bf2bff0243fa..92188ee54fd2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -297,8 +297,10 @@ object HiveTypeCoercion {
 
       case Sum(e @ StringType()) => Sum(Cast(e, DoubleType))
       case Average(e @ StringType()) => Average(Cast(e, DoubleType))
-      case StddevPop(e @ StringType()) => StddevPop(Cast(e, DoubleType))
-      case StddevSamp(e @ StringType()) => StddevSamp(Cast(e, DoubleType))
+      case StddevPop(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        StddevPop(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
+      case StddevSamp(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
+        StddevSamp(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
       case VariancePop(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
         VariancePop(Cast(e, DoubleType), mutableAggBufferOffset, inputAggBufferOffset)
       case VarianceSamp(e @ StringType(), mutableAggBufferOffset, inputAggBufferOffset) =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
index bae78d98493b..8fa3aac9f1a5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
@@ -42,9 +42,11 @@ case class Kurtosis(child: Expression,
       s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
     val m2 = moments(2)
     val m4 = moments(4)
+
     if (n == 0.0 || m2 == 0.0) {
       Double.NaN
-    } else {
+    }
+    else {
       n * m4 / (m2 * m2) - 3.0
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
index c593074fa247..e1c01a5b8278 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
@@ -41,9 +41,11 @@ case class Skewness(child: Expression,
       s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
     val m2 = moments(2)
     val m3 = moments(3)
+
     if (n == 0.0 || m2 == 0.0) {
       Double.NaN
-    } else {
+    }
+    else {
       math.sqrt(n) * m3 / math.sqrt(m2 * m2 * m2)
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
index 274800962335..05dd5e3b2254 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
@@ -17,117 +17,55 @@
 
 package org.apache.spark.sql.catalyst.expressions.aggregate
 
-import org.apache.spark.sql.catalyst.analysis.TypeCheckResult
-import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.TypeUtils
-import org.apache.spark.sql.types._
 
+case class StddevSamp(child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
 
-// Compute the population standard deviation of a column
-case class StddevPop(child: Expression) extends StddevAgg(child) {
-  override def isSample: Boolean = false
-  override def prettyName: String = "stddev_pop"
-}
-
-
-// Compute the sample standard deviation of a column
-case class StddevSamp(child: Expression) extends StddevAgg(child) {
-  override def isSample: Boolean = true
-  override def prettyName: String = "stddev_samp"
-}
-
-
-// Compute standard deviation based on online algorithm specified here:
-// http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
-abstract class StddevAgg(child: Expression) extends DeclarativeAggregate {
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
 
-  def isSample: Boolean
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
-  override def children: Seq[Expression] = child :: Nil
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
 
-  override def nullable: Boolean = true
-
-  override def dataType: DataType = resultType
-
-  override def inputTypes: Seq[AbstractDataType] = Seq(NumericType)
+  override def prettyName: String = "stddev_samp"
 
-  override def checkInputDataTypes(): TypeCheckResult =
-    TypeUtils.checkForNumericExpr(child.dataType, "function stddev")
+  override protected val momentOrder = 2
 
-  private lazy val resultType = DoubleType
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-  private lazy val count = AttributeReference("count", resultType)()
-  private lazy val avg = AttributeReference("avg", resultType)()
-  private lazy val mk = AttributeReference("mk", resultType)()
+    if (n == 0.0 || n == 1.0) Double.NaN else math.sqrt(moments(2) / (n - 1.0))
+  }
+}
 
-  override lazy val aggBufferAttributes = count :: avg :: mk :: Nil
+case class StddevPop(
+    child: Expression,
+    mutableAggBufferOffset: Int = 0,
+    inputAggBufferOffset: Int = 0)
+  extends CentralMomentAgg(child) {
 
-  override lazy val initialValues: Seq[Expression] = Seq(
-    /* count = */ Cast(Literal(0), resultType),
-    /* avg = */ Cast(Literal(0), resultType),
-    /* mk = */ Cast(Literal(0), resultType)
-  )
+  def this(child: Expression) = this(child, mutableAggBufferOffset = 0, inputAggBufferOffset = 0)
 
-  override lazy val updateExpressions: Seq[Expression] = {
-    val value = Cast(child, resultType)
-    val newCount = count + Cast(Literal(1), resultType)
+  override def withNewMutableAggBufferOffset(newMutableAggBufferOffset: Int): ImperativeAggregate =
+    copy(mutableAggBufferOffset = newMutableAggBufferOffset)
 
-    // update average
-    // avg = avg + (value - avg)/count
-    val newAvg = avg + (value - avg) / newCount
+  override def withNewInputAggBufferOffset(newInputAggBufferOffset: Int): ImperativeAggregate =
+    copy(inputAggBufferOffset = newInputAggBufferOffset)
 
-    // update sum ofference from mean
-    // Mk = Mk + (value - preAvg) * (value - updatedAvg)
-    val newMk = mk + (value - avg) * (value - newAvg)
+  override def prettyName: String = "stddev_pop"
 
-    Seq(
-      /* count = */ If(IsNull(child), count, newCount),
-      /* avg = */ If(IsNull(child), avg, newAvg),
-      /* mk = */ If(IsNull(child), mk, newMk)
-    )
-  }
+  override protected val momentOrder = 2
 
-  override lazy val mergeExpressions: Seq[Expression] = {
-
-    // count merge
-    val newCount = count.left + count.right
-
-    // average merge
-    val newAvg = ((avg.left * count.left) + (avg.right * count.right)) / newCount
-
-    // update sum of square differences
-    val newMk = {
-      val avgDelta = avg.right - avg.left
-      val mkDelta = (avgDelta * avgDelta) * (count.left * count.right) / newCount
-      mk.left + mk.right + mkDelta
-    }
-
-    Seq(
-      /* count = */ If(IsNull(count.left), count.right,
-                       If(IsNull(count.right), count.left, newCount)),
-      /* avg = */ If(IsNull(avg.left), avg.right,
-                     If(IsNull(avg.right), avg.left, newAvg)),
-      /* mk = */ If(IsNull(mk.left), mk.right,
-                    If(IsNull(mk.right), mk.left, newMk))
-    )
-  }
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+    require(moments.length == momentOrder + 1,
+      s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-  override lazy val evaluateExpression: Expression = {
-    // when count == 0, return null
-    // when count == 1, return 0
-    // when count >1
-    // stddev_samp = sqrt (mk/(count -1))
-    // stddev_pop = sqrt (mk/count)
-    val varCol =
-      if (isSample) {
-        mk / Cast(count - Cast(Literal(1), resultType), resultType)
-      } else {
-        mk / count
-      }
-
-    If(EqualTo(count, Cast(Literal(0), resultType)), Cast(Literal(null), resultType),
-      If(EqualTo(count, Cast(Literal(1), resultType)), Cast(Literal(0), resultType),
-        Cast(Sqrt(varCol), resultType)))
+    if (n == 0.0) Double.NaN else math.sqrt(moments(2) / n)
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index b6330e230afe..53cc6e0cda11 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -397,7 +397,7 @@ object functions extends LegacyFunctions {
   def stddev(e: Column): Column = withAggregateFunction { StddevSamp(e.expr) }
 
   /**
-   * Aggregate function: returns the unbiased sample standard deviation of
+   * Aggregate function: returns the sample standard deviation of
    * the expression in a group.
    *
    * @group agg_funcs
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index eb1ee266c5d2..432e8d17623a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -195,7 +195,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
   }
 
   test("stddev") {
-    val testData2ADev = math.sqrt(4 / 5.0)
+    val testData2ADev = math.sqrt(4.0 / 5.0)
     checkAnswer(
       testData2.agg(stddev('a), stddev_pop('a), stddev_samp('a)),
       Row(testData2ADev, math.sqrt(4 / 6.0), testData2ADev))
@@ -205,7 +205,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
     checkAnswer(
     emptyTableData.agg(stddev('a), stddev_pop('a), stddev_samp('a)),
-    Row(null, null, null))
+    Row(Double.NaN, Double.NaN, Double.NaN))
   }
 
   test("zero sum") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index e4f23fe17b75..35cdab50bdec 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -459,7 +459,7 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     val emptyDescribeResult = Seq(
       Row("count", "0", "0"),
       Row("mean", null, null),
-      Row("stddev", null, null),
+      Row("stddev", "NaN", "NaN"),
       Row("min", null, null),
       Row("max", null, null))
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 52a561d2e545..167aea87de07 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -314,13 +314,6 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
       testCodeGen(
         "SELECT min(key) FROM testData3x",
         Row(1) :: Nil)
-      // STDDEV
-      testCodeGen(
-        "SELECT a, stddev(b), stddev_pop(b) FROM testData2 GROUP BY a",
-        (1 to 3).map(i => Row(i, math.sqrt(0.5), math.sqrt(0.25))))
-      testCodeGen(
-        "SELECT stddev(b), stddev_pop(b), stddev_samp(b) FROM testData2",
-        Row(math.sqrt(1.5 / 5), math.sqrt(1.5 / 6), math.sqrt(1.5 / 5)) :: Nil)
       // Some combinations.
       testCodeGen(
         """
@@ -341,8 +334,8 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
         Row(100, 1, 50.5, 300, 100) :: Nil)
       // Aggregate with Code generation handling all null values
       testCodeGen(
-        "SELECT  sum('a'), avg('a'), stddev('a'), count(null) FROM testData",
-        Row(null, null, null, 0) :: Nil)
+        "SELECT  sum('a'), avg('a'), count(null) FROM testData",
+        Row(null, null, 0) :: Nil)
     } finally {
       sqlContext.dropTempTable("testData3x")
     }

From 767d288b6b33a79d99324b70c2ac079fcf484a50 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 12 Nov 2015 14:29:16 -0800
Subject: [PATCH 651/896] [SPARK-11655][CORE] Fix deadlock in handling of
 launcher stop().

The stop() callback was trying to close the launcher connection in the
same thread that handles connection data, which ended up causing a
deadlock. So avoid that by dispatching the stop() request in its own
thread.

On top of that, add some exception safety to a few parts of the code,
and use "destroyForcibly" from Java 8 if it's available, to force
kill the child process. The flip side is that "kill()" may not actually
work if running Java 7.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9633 from vanzin/SPARK-11655.
---
 .../spark/launcher/LauncherBackend.scala      | 12 +++++++++--
 .../cluster/SparkDeploySchedulerBackend.scala | 20 ++++++++++---------
 .../spark/launcher/ChildProcAppHandle.java    | 17 ++++++++++++++--
 .../apache/spark/launcher/SparkAppHandle.java |  3 +++
 4 files changed, 39 insertions(+), 13 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala b/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
index 3ea984c501e0..a5d41a1eeb47 100644
--- a/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
+++ b/core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala
@@ -21,7 +21,7 @@ import java.net.{InetAddress, Socket}
 
 import org.apache.spark.SPARK_VERSION
 import org.apache.spark.launcher.LauncherProtocol._
-import org.apache.spark.util.ThreadUtils
+import org.apache.spark.util.{ThreadUtils, Utils}
 
 /**
  * A class that can be used to talk to a launcher server. Users should extend this class to
@@ -88,12 +88,20 @@ private[spark] abstract class LauncherBackend {
    */
   protected def onDisconnected() : Unit = { }
 
+  private def fireStopRequest(): Unit = {
+    val thread = LauncherBackend.threadFactory.newThread(new Runnable() {
+      override def run(): Unit = Utils.tryLogNonFatalError {
+        onStopRequest()
+      }
+    })
+    thread.start()
+  }
 
   private class BackendConnection(s: Socket) extends LauncherConnection(s) {
 
     override protected def handle(m: Message): Unit = m match {
       case _: Stop =>
-        onStopRequest()
+        fireStopRequest()
 
       case _ =>
         throw new IllegalArgumentException(s"Unexpected message type: ${m.getClass().getName()}")
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
index 05d9bc92f228..5105475c760e 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
@@ -191,17 +191,19 @@ private[spark] class SparkDeploySchedulerBackend(
   }
 
   private def stop(finalState: SparkAppHandle.State): Unit = synchronized {
-    stopping = true
+    try {
+      stopping = true
 
-    launcherBackend.setState(finalState)
-    launcherBackend.close()
+      super.stop()
+      client.stop()
 
-    super.stop()
-    client.stop()
-
-    val callback = shutdownCallback
-    if (callback != null) {
-      callback(this)
+      val callback = shutdownCallback
+      if (callback != null) {
+        callback(this)
+      }
+    } finally {
+      launcherBackend.setState(finalState)
+      launcherBackend.close()
     }
   }
 
diff --git a/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java b/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
index de50f14fbdc8..1bfda289dec3 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/ChildProcAppHandle.java
@@ -18,6 +18,7 @@
 package org.apache.spark.launcher;
 
 import java.io.IOException;
+import java.lang.reflect.Method;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ThreadFactory;
@@ -102,8 +103,20 @@ public synchronized void kill() {
       disconnect();
     }
     if (childProc != null) {
-      childProc.destroy();
-      childProc = null;
+      try {
+        childProc.exitValue();
+      } catch (IllegalThreadStateException e) {
+        // Child is still alive. Try to use Java 8's "destroyForcibly()" if available,
+        // fall back to the old API if it's not there.
+        try {
+          Method destroy = childProc.getClass().getMethod("destroyForcibly");
+          destroy.invoke(childProc);
+        } catch (Exception inner) {
+          childProc.destroy();
+        }
+      } finally {
+        childProc = null;
+      }
     }
   }
 
diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
index 13dd9f1739fb..e9caf0b3cb06 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkAppHandle.java
@@ -89,6 +89,9 @@ public boolean isFinal() {
    * Tries to kill the underlying application. Implies {@link #disconnect()}. This will not send
    * a {@link #stop()} message to the application, so it's recommended that users first try to
    * stop the application cleanly and only resort to this method if that fails.
+   * <p>
+   * Note that if the application is running as a child process, this method fail to kill the
+   * process when using Java 7. This may happen if, for example, the application is deadlocked.
    */
   void kill();
 

From f0d3b58d91f43697397cdd7a7e7f38cbb7daaa31 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Thu, 12 Nov 2015 14:52:03 -0800
Subject: [PATCH 652/896] [SPARK-11290][STREAMING][TEST-MAVEN] Fix the test for
 maven build

Should not create SparkContext in the constructor of `TrackStateRDDSuite`. This is a follow up PR for #9256 to fix the test for maven build.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9668 from zsxwing/hotfix.
---
 .../spark/streaming/rdd/TrackStateRDDSuite.scala     | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
index fc5f26607ef9..f396b76e8d25 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
@@ -28,11 +28,17 @@ import org.apache.spark.{HashPartitioner, SparkConf, SparkContext, SparkFunSuite
 
 class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
 
-  private var sc = new SparkContext(
-    new SparkConf().setMaster("local").setAppName("TrackStateRDDSuite"))
+  private var sc: SparkContext = null
+
+  override def beforeAll(): Unit = {
+    sc = new SparkContext(
+      new SparkConf().setMaster("local").setAppName("TrackStateRDDSuite"))
+  }
 
   override def afterAll(): Unit = {
-    sc.stop()
+    if (sc != null) {
+      sc.stop()
+    }
   }
 
   test("creation from pair RDD") {

From 380dfcc0dc865d361a97bb045a2ac546dacfdba9 Mon Sep 17 00:00:00 2001
From: Chris Snow <chsnow123@gmail.com>
Date: Thu, 12 Nov 2015 15:42:30 -0800
Subject: [PATCH 653/896] [SPARK-11671] documentation code example typo

Example for sqlContext.createDataDrame from pandas.DataFrame has a typo

Author: Chris Snow <chsnow123@gmail.com>

Closes #9639 from snowch/patch-2.
---
 python/pyspark/sql/context.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/pyspark/sql/context.py b/python/pyspark/sql/context.py
index 924bb6433de0..5a85ac31025e 100644
--- a/python/pyspark/sql/context.py
+++ b/python/pyspark/sql/context.py
@@ -415,7 +415,7 @@ def createDataFrame(self, data, schema=None, samplingRatio=None):
 
         >>> sqlContext.createDataFrame(df.toPandas()).collect()  # doctest: +SKIP
         [Row(name=u'Alice', age=1)]
-        >>> sqlContext.createDataFrame(pandas.DataFrame([[1, 2]]).collect())  # doctest: +SKIP
+        >>> sqlContext.createDataFrame(pandas.DataFrame([[1, 2]])).collect()  # doctest: +SKIP
         [Row(0=1, 1=2)]
         """
         if isinstance(data, DataFrame):

From 74c30049a8bf9841eeca48f827572c2044912e21 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Baptiste=20Onofr=C3=A9?= <jbonofre@apache.org>
Date: Thu, 12 Nov 2015 15:46:21 -0800
Subject: [PATCH 654/896] [SPARK-2533] Add locality levels on stage summary
 view
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Author: Jean-Baptiste Onofré <jbonofre@apache.org>

Closes #9487 from jbonofre/SPARK-2533-2.
---
 .../org/apache/spark/ui/jobs/StagePage.scala  | 21 ++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala b/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
index 51425e599e74..1b34ba9f03c4 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/StagePage.scala
@@ -28,7 +28,7 @@ import org.apache.commons.lang3.StringEscapeUtils
 
 import org.apache.spark.{InternalAccumulator, SparkConf}
 import org.apache.spark.executor.TaskMetrics
-import org.apache.spark.scheduler.{AccumulableInfo, TaskInfo}
+import org.apache.spark.scheduler.{AccumulableInfo, TaskInfo, TaskLocality}
 import org.apache.spark.ui._
 import org.apache.spark.ui.jobs.UIData._
 import org.apache.spark.util.{Utils, Distribution}
@@ -70,6 +70,21 @@ private[ui] class StagePage(parent: StagesTab) extends WebUIPage("stage") {
 
   private val displayPeakExecutionMemory = parent.conf.getBoolean("spark.sql.unsafe.enabled", true)
 
+  private def getLocalitySummaryString(stageData: StageUIData): String = {
+    val localities = stageData.taskData.values.map(_.taskInfo.taskLocality)
+    val localityCounts = localities.groupBy(identity).mapValues(_.size)
+    val localityNamesAndCounts = localityCounts.toSeq.map { case (locality, count) =>
+      val localityName = locality match {
+        case TaskLocality.PROCESS_LOCAL => "Process local"
+        case TaskLocality.NODE_LOCAL => "Node local"
+        case TaskLocality.RACK_LOCAL => "Rack local"
+        case TaskLocality.ANY => "Any"
+      }
+      s"$localityName: $count"
+    }
+    localityNamesAndCounts.sorted.mkString("; ")
+  }
+
   def render(request: HttpServletRequest): Seq[Node] = {
     progressListener.synchronized {
       val parameterId = request.getParameter("id")
@@ -129,6 +144,10 @@ private[ui] class StagePage(parent: StagesTab) extends WebUIPage("stage") {
               <strong>Total Time Across All Tasks: </strong>
               {UIUtils.formatDuration(stageData.executorRunTime)}
             </li>
+            <li>
+              <strong>Locality Level Summary: </strong>
+              {getLocalitySummaryString(stageData)}
+            </li>
             {if (stageData.hasInput) {
               <li>
                 <strong>Input Size / Records: </strong>

From cf38fc7551f4743958c2fdc7931affd672755e68 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Thu, 12 Nov 2015 15:47:29 -0800
Subject: [PATCH 655/896] [SPARK-11670] Fix incorrect kryo buffer default value
 in docs

<img width="931" alt="screen shot 2015-11-11 at 1 53 21 pm" src="https://cloud.githubusercontent.com/assets/2133137/11108261/35d183d4-889a-11e5-9572-85e9d6cebd26.png">

Author: Andrew Or <andrew@databricks.com>

Closes #9638 from andrewor14/fix-kryo-docs.
---
 docs/tuning.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/tuning.md b/docs/tuning.md
index 6936912a6be5..879340a01544 100644
--- a/docs/tuning.md
+++ b/docs/tuning.md
@@ -61,8 +61,8 @@ The [Kryo documentation](https://github.com/EsotericSoftware/kryo) describes mor
 registration options, such as adding custom serialization code.
 
 If your objects are large, you may also need to increase the `spark.kryoserializer.buffer`
-config property. The default is 2, but this value needs to be large enough to hold the *largest*
-object you will serialize.
+[config](configuration.html#compression-and-serialization). This value needs to be large enough
+to hold the *largest* object you will serialize.
 
 Finally, if you don't register your custom classes, Kryo will still work, but it will have to store
 the full class name with each object, which is wasteful.

From 12a0784ac0f314a606f1237e7144eb1355421307 Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Thu, 12 Nov 2015 15:48:42 -0800
Subject: [PATCH 656/896] [SPARK-11667] Update dynamic allocation docs to
 reflect supported cluster managers

Author: Andrew Or <andrew@databricks.com>

Closes #9637 from andrewor14/update-da-docs.
---
 docs/job-scheduling.md | 55 +++++++++++++++++++++---------------------
 1 file changed, 27 insertions(+), 28 deletions(-)

diff --git a/docs/job-scheduling.md b/docs/job-scheduling.md
index 8d9c2ba2041b..a3c34cb6796f 100644
--- a/docs/job-scheduling.md
+++ b/docs/job-scheduling.md
@@ -56,36 +56,32 @@ provide another approach to share RDDs.
 
 ## Dynamic Resource Allocation
 
-Spark 1.2 introduces the ability to dynamically scale the set of cluster resources allocated to
-your application up and down based on the workload. This means that your application may give
-resources back to the cluster if they are no longer used and request them again later when there
-is demand. This feature is particularly useful if multiple applications share resources in your
-Spark cluster. If a subset of the resources allocated to an application becomes idle, it can be
-returned to the cluster's pool of resources and acquired by other applications. In Spark, dynamic
-resource allocation is performed on the granularity of the executor and can be enabled through
-`spark.dynamicAllocation.enabled`.
-
-This feature is currently disabled by default and available only on [YARN](running-on-yarn.html).
-A future release will extend this to [standalone mode](spark-standalone.html) and
-[Mesos coarse-grained mode](running-on-mesos.html#mesos-run-modes). Note that although Spark on
-Mesos already has a similar notion of dynamic resource sharing in fine-grained mode, enabling
-dynamic allocation allows your Mesos application to take advantage of coarse-grained low-latency
-scheduling while sharing cluster resources efficiently.
+Spark provides a mechanism to dynamically adjust the resources your application occupies based
+on the workload. This means that your application may give resources back to the cluster if they
+are no longer used and request them again later when there is demand. This feature is particularly
+useful if multiple applications share resources in your Spark cluster.
+
+This feature is disabled by default and available on all coarse-grained cluster managers, i.e.
+[standalone mode](spark-standalone.html), [YARN mode](running-on-yarn.html), and
+[Mesos coarse-grained mode](running-on-mesos.html#mesos-run-modes).
 
 ### Configuration and Setup
 
-All configurations used by this feature live under the `spark.dynamicAllocation.*` namespace.
-To enable this feature, your application must set `spark.dynamicAllocation.enabled` to `true`.
-Other relevant configurations are described on the
-[configurations page](configuration.html#dynamic-allocation) and in the subsequent sections in
-detail.
+There are two requirements for using this feature. First, your application must set
+`spark.dynamicAllocation.enabled` to `true`. Second, you must set up an *external shuffle service*
+on each worker node in the same cluster and set `spark.shuffle.service.enabled` to true in your
+application. The purpose of the external shuffle service is to allow executors to be removed
+without deleting shuffle files written by them (more detail described
+[below](job-scheduling.html#graceful-decommission-of-executors)). The way to set up this service
+varies across cluster managers:
+
+In standalone mode, simply start your workers with `spark.shuffle.service.enabled` set to `true`.
 
-Additionally, your application must use an external shuffle service. The purpose of the service is
-to preserve the shuffle files written by executors so the executors can be safely removed (more
-detail described [below](job-scheduling.html#graceful-decommission-of-executors)). To enable
-this service, set `spark.shuffle.service.enabled` to `true`. In YARN, this external shuffle service
-is implemented in `org.apache.spark.yarn.network.YarnShuffleService` that runs in each `NodeManager`
-in your cluster. To start this service, follow these steps:
+In Mesos coarse-grained mode, run `$SPARK_HOME/sbin/start-mesos-shuffle-service.sh` on all
+slave nodes with `spark.shuffle.service.enabled` set to `true`. For instance, you may do so
+through Marathon.
+
+In YARN mode, start the shuffle service on each `NodeManager` as follows:
 
 1. Build Spark with the [YARN profile](building-spark.html). Skip this step if you are using a
 pre-packaged distribution.
@@ -95,10 +91,13 @@ pre-packaged distribution.
 2. Add this jar to the classpath of all `NodeManager`s in your cluster.
 3. In the `yarn-site.xml` on each node, add `spark_shuffle` to `yarn.nodemanager.aux-services`,
 then set `yarn.nodemanager.aux-services.spark_shuffle.class` to
-`org.apache.spark.network.yarn.YarnShuffleService`. Additionally, set all relevant
-`spark.shuffle.service.*` [configurations](configuration.html).
+`org.apache.spark.network.yarn.YarnShuffleService` and `spark.shuffle.service.enabled` to true.
 4. Restart all `NodeManager`s in your cluster.
 
+All other relevant configurations are optional and under the `spark.dynamicAllocation.*` and
+`spark.shuffle.service.*` namespaces. For more detail, see the
+[configurations page](configuration.html#dynamic-allocation).
+
 ### Resource Allocation Policy
 
 At a high level, Spark should relinquish executors when they are no longer used and acquire

From 68ef61bb656bd9c08239726913ca8ab271d52786 Mon Sep 17 00:00:00 2001
From: Chris Snow <chsnow123@gmail.com>
Date: Thu, 12 Nov 2015 15:50:47 -0800
Subject: [PATCH 657/896] [SPARK-11658] simplify documentation for PySpark
 combineByKey

Author: Chris Snow <chsnow123@gmail.com>

Closes #9640 from snowch/patch-3.
---
 python/pyspark/rdd.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index 56e892243c79..4b4d59647b2b 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -1760,7 +1760,6 @@ def combineByKey(self, createCombiner, mergeValue, mergeCombiners,
         In addition, users can control the partitioning of the output RDD.
 
         >>> x = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
-        >>> def f(x): return x
         >>> def add(a, b): return a + str(b)
         >>> sorted(x.combineByKey(str, add, add).collect())
         [('a', '11'), ('b', '1')]

From bc092966f8264c6685b3300461cb79dd6a509ecf Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Thu, 12 Nov 2015 16:43:04 -0800
Subject: [PATCH 658/896] [SPARK-11709] include creation site info in
 SparkContext.assertNotStopped error message

This helps debug issues caused by multiple SparkContext instances. JoshRosen andrewor14

~~~
scala> sc.stop()

scala> sc.parallelize(0 until 10)
java.lang.IllegalStateException: Cannot call methods on a stopped SparkContext.
This stopped SparkContext was created at:

org.apache.spark.SparkContext.<init>(SparkContext.scala:82)
org.apache.spark.repl.SparkILoop.createSparkContext(SparkILoop.scala:1017)
$iwC$$iwC.<init>(<console>:9)
$iwC.<init>(<console>:18)
<init>(<console>:20)
.<init>(<console>:24)
.<clinit>(<console>)
.<init>(<console>:7)
.<clinit>(<console>)
$print(<console>)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.apache.spark.repl.SparkIMain$ReadEvalPrint.call(SparkIMain.scala:1065)
org.apache.spark.repl.SparkIMain$Request.loadAndRun(SparkIMain.scala:1340)
org.apache.spark.repl.SparkIMain.loadAndRunReq$1(SparkIMain.scala:840)
org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:871)
org.apache.spark.repl.SparkIMain.interpret(SparkIMain.scala:819)
org.apache.spark.repl.SparkILoop.reallyInterpret$1(SparkILoop.scala:857)

The active context was created at:

(No active SparkContext.)
~~~

Author: Xiangrui Meng <meng@databricks.com>

Closes #9675 from mengxr/SPARK-11709.
---
 .../scala/org/apache/spark/SparkContext.scala  | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 43a241686fd7..4bbd0b038c00 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -96,7 +96,23 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
 
   private def assertNotStopped(): Unit = {
     if (stopped.get()) {
-      throw new IllegalStateException("Cannot call methods on a stopped SparkContext")
+      val activeContext = SparkContext.activeContext.get()
+      val activeCreationSite =
+        if (activeContext == null) {
+          "(No active SparkContext.)"
+        } else {
+          activeContext.creationSite.longForm
+        }
+      throw new IllegalStateException(
+        s"""Cannot call methods on a stopped SparkContext.
+           |This stopped SparkContext was created at:
+           |
+           |${creationSite.longForm}
+           |
+           |The currently active SparkContext was created at:
+           |
+           |$activeCreationSite
+         """.stripMargin)
     }
   }
 

From dcb896fd8cec83483f700ee985c352be61cdf233 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Thu, 12 Nov 2015 17:03:19 -0800
Subject: [PATCH 659/896] [SPARK-11712][ML] Make spark.ml LDAModel be abstract

Per discussion in the initial Pipelines LDA PR [https://github.com/apache/spark/pull/9513], we should make LDAModel abstract and create a LocalLDAModel. This code simplification should be done before the 1.6 release to ensure API compatibility in future releases.

CC feynmanliang mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9678 from jkbradley/lda-pipelines-2.
---
 .../org/apache/spark/ml/clustering/LDA.scala  | 180 +++++++++---------
 .../apache/spark/ml/clustering/LDASuite.scala |   4 +-
 2 files changed, 96 insertions(+), 88 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
index f66233ed3d0f..92e05815d6a3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
@@ -314,31 +314,31 @@ private[clustering] trait LDAParams extends Params with HasFeaturesCol with HasM
  * Model fitted by [[LDA]].
  *
  * @param vocabSize  Vocabulary size (number of terms or terms in the vocabulary)
- * @param oldLocalModel  Underlying spark.mllib model.
- *                       If this model was produced by Online LDA, then this is the
- *                       only model representation.
- *                       If this model was produced by EM, then this local
- *                       representation may be built lazily.
  * @param sqlContext  Used to construct local DataFrames for returning query results
  */
 @Since("1.6.0")
 @Experimental
-class LDAModel private[ml] (
+sealed abstract class LDAModel private[ml] (
     @Since("1.6.0") override val uid: String,
     @Since("1.6.0") val vocabSize: Int,
-    @Since("1.6.0") protected var oldLocalModel: Option[OldLocalLDAModel],
     @Since("1.6.0") @transient protected val sqlContext: SQLContext)
   extends Model[LDAModel] with LDAParams with Logging {
 
-  /** Returns underlying spark.mllib model */
+  // NOTE to developers:
+  //  This abstraction should contain all important functionality for basic LDA usage.
+  //  Specializations of this class can contain expert-only functionality.
+
+  /**
+   * Underlying spark.mllib model.
+   * If this model was produced by Online LDA, then this is the only model representation.
+   * If this model was produced by EM, then this local representation may be built lazily.
+   */
   @Since("1.6.0")
-  protected def getModel: OldLDAModel = oldLocalModel match {
-    case Some(m) => m
-    case None =>
-      // Should never happen.
-      throw new RuntimeException("LDAModel required local model format," +
-        " but the underlying model is missing.")
-  }
+  protected def oldLocalModel: OldLocalLDAModel
+
+  /** Returns underlying spark.mllib model, which may be local or distributed */
+  @Since("1.6.0")
+  protected def getModel: OldLDAModel
 
   /**
    * The features for LDA should be a [[Vector]] representing the word counts in a document.
@@ -352,16 +352,17 @@ class LDAModel private[ml] (
   @Since("1.6.0")
   def setSeed(value: Long): this.type = set(seed, value)
 
-  @Since("1.6.0")
-  override def copy(extra: ParamMap): LDAModel = {
-    val copied = new LDAModel(uid, vocabSize, oldLocalModel, sqlContext)
-    copyValues(copied, extra).setParent(parent)
-  }
-
+  /**
+   * Transforms the input dataset.
+   *
+   * WARNING: If this model is an instance of [[DistributedLDAModel]] (produced when [[optimizer]]
+   *          is set to "em"), this involves collecting a large [[topicsMatrix]] to the driver.
+   *          This implementation may be changed in the future.
+   */
   @Since("1.6.0")
   override def transform(dataset: DataFrame): DataFrame = {
     if ($(topicDistributionCol).nonEmpty) {
-      val t = udf(oldLocalModel.get.getTopicDistributionMethod(sqlContext.sparkContext))
+      val t = udf(oldLocalModel.getTopicDistributionMethod(sqlContext.sparkContext))
       dataset.withColumn($(topicDistributionCol), t(col($(featuresCol))))
     } else {
       logWarning("LDAModel.transform was called without any output columns. Set an output column" +
@@ -388,56 +389,50 @@ class LDAModel private[ml] (
    * This is a matrix of size vocabSize x k, where each column is a topic.
    * No guarantees are given about the ordering of the topics.
    *
-   * WARNING: If this model is actually a [[DistributedLDAModel]] instance from EM,
-   *          then this method could involve collecting a large amount of data to the driver
-   *          (on the order of vocabSize x k).
+   * WARNING: If this model is actually a [[DistributedLDAModel]] instance produced by
+   *          the Expectation-Maximization ("em") [[optimizer]], then this method could involve
+   *          collecting a large amount of data to the driver (on the order of vocabSize x k).
    */
   @Since("1.6.0")
-  def topicsMatrix: Matrix = getModel.topicsMatrix
+  def topicsMatrix: Matrix = oldLocalModel.topicsMatrix
 
   /** Indicates whether this instance is of type [[DistributedLDAModel]] */
   @Since("1.6.0")
-  def isDistributed: Boolean = false
+  def isDistributed: Boolean
 
   /**
    * Calculates a lower bound on the log likelihood of the entire corpus.
    *
    * See Equation (16) in the Online LDA paper (Hoffman et al., 2010).
    *
-   * WARNING: If this model was learned via a [[DistributedLDAModel]], this involves collecting
-   *          a large [[topicsMatrix]] to the driver.  This implementation may be changed in the
-   *          future.
+   * WARNING: If this model is an instance of [[DistributedLDAModel]] (produced when [[optimizer]]
+   *          is set to "em"), this involves collecting a large [[topicsMatrix]] to the driver.
+   *          This implementation may be changed in the future.
    *
    * @param dataset  test corpus to use for calculating log likelihood
    * @return variational lower bound on the log likelihood of the entire corpus
    */
   @Since("1.6.0")
-  def logLikelihood(dataset: DataFrame): Double = oldLocalModel match {
-    case Some(m) =>
-      val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
-      m.logLikelihood(oldDataset)
-    case None =>
-      // Should never happen.
-      throw new RuntimeException("LocalLDAModel.logLikelihood was called," +
-        " but the underlying model is missing.")
+  def logLikelihood(dataset: DataFrame): Double = {
+    val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
+    oldLocalModel.logLikelihood(oldDataset)
   }
 
   /**
    * Calculate an upper bound bound on perplexity.  (Lower is better.)
    * See Equation (16) in the Online LDA paper (Hoffman et al., 2010).
    *
+   * WARNING: If this model is an instance of [[DistributedLDAModel]] (produced when [[optimizer]]
+   *          is set to "em"), this involves collecting a large [[topicsMatrix]] to the driver.
+   *          This implementation may be changed in the future.
+   *
    * @param dataset test corpus to use for calculating perplexity
    * @return Variational upper bound on log perplexity per token.
    */
   @Since("1.6.0")
-  def logPerplexity(dataset: DataFrame): Double = oldLocalModel match {
-    case Some(m) =>
-      val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
-      m.logPerplexity(oldDataset)
-    case None =>
-      // Should never happen.
-      throw new RuntimeException("LocalLDAModel.logPerplexity was called," +
-        " but the underlying model is missing.")
+  def logPerplexity(dataset: DataFrame): Double = {
+    val oldDataset = LDA.getOldDataset(dataset, $(featuresCol))
+    oldLocalModel.logPerplexity(oldDataset)
   }
 
   /**
@@ -468,10 +463,43 @@ class LDAModel private[ml] (
 /**
  * :: Experimental ::
  *
- * Distributed model fitted by [[LDA]] using Expectation-Maximization (EM).
+ * Local (non-distributed) model fitted by [[LDA]].
+ *
+ * This model stores the inferred topics only; it does not store info about the training dataset.
+ */
+@Since("1.6.0")
+@Experimental
+class LocalLDAModel private[ml] (
+    uid: String,
+    vocabSize: Int,
+    @Since("1.6.0") override protected val oldLocalModel: OldLocalLDAModel,
+    sqlContext: SQLContext)
+  extends LDAModel(uid, vocabSize, sqlContext) {
+
+  @Since("1.6.0")
+  override def copy(extra: ParamMap): LocalLDAModel = {
+    val copied = new LocalLDAModel(uid, vocabSize, oldLocalModel, sqlContext)
+    copyValues(copied, extra).setParent(parent).asInstanceOf[LocalLDAModel]
+  }
+
+  override protected def getModel: OldLDAModel = oldLocalModel
+
+  @Since("1.6.0")
+  override def isDistributed: Boolean = false
+}
+
+
+/**
+ * :: Experimental ::
+ *
+ * Distributed model fitted by [[LDA]].
+ * This type of model is currently only produced by Expectation-Maximization (EM).
  *
  * This model stores the inferred topics, the full training dataset, and the topic distribution
  * for each training document.
+ *
+ * @param oldLocalModelOption  Used to implement [[oldLocalModel]] as a lazy val, but keeping
+ *                             [[copy()]] cheap.
  */
 @Since("1.6.0")
 @Experimental
@@ -479,59 +507,39 @@ class DistributedLDAModel private[ml] (
     uid: String,
     vocabSize: Int,
     private val oldDistributedModel: OldDistributedLDAModel,
-    sqlContext: SQLContext)
-  extends LDAModel(uid, vocabSize, None, sqlContext) {
+    sqlContext: SQLContext,
+    private var oldLocalModelOption: Option[OldLocalLDAModel])
+  extends LDAModel(uid, vocabSize, sqlContext) {
+
+  override protected def oldLocalModel: OldLocalLDAModel = {
+    if (oldLocalModelOption.isEmpty) {
+      oldLocalModelOption = Some(oldDistributedModel.toLocal)
+    }
+    oldLocalModelOption.get
+  }
+
+  override protected def getModel: OldLDAModel = oldDistributedModel
 
   /**
    * Convert this distributed model to a local representation.  This discards info about the
    * training dataset.
+   *
+   * WARNING: This involves collecting a large [[topicsMatrix]] to the driver.
    */
   @Since("1.6.0")
-  def toLocal: LDAModel = {
-    if (oldLocalModel.isEmpty) {
-      oldLocalModel = Some(oldDistributedModel.toLocal)
-    }
-    new LDAModel(uid, vocabSize, oldLocalModel, sqlContext)
-  }
-
-  @Since("1.6.0")
-  override protected def getModel: OldLDAModel = oldDistributedModel
+  def toLocal: LocalLDAModel = new LocalLDAModel(uid, vocabSize, oldLocalModel, sqlContext)
 
   @Since("1.6.0")
   override def copy(extra: ParamMap): DistributedLDAModel = {
-    val copied = new DistributedLDAModel(uid, vocabSize, oldDistributedModel, sqlContext)
-    if (oldLocalModel.nonEmpty) copied.oldLocalModel = oldLocalModel
+    val copied =
+      new DistributedLDAModel(uid, vocabSize, oldDistributedModel, sqlContext, oldLocalModelOption)
     copyValues(copied, extra).setParent(parent)
     copied
   }
 
-  @Since("1.6.0")
-  override def topicsMatrix: Matrix = {
-    if (oldLocalModel.isEmpty) {
-      oldLocalModel = Some(oldDistributedModel.toLocal)
-    }
-    super.topicsMatrix
-  }
-
   @Since("1.6.0")
   override def isDistributed: Boolean = true
 
-  @Since("1.6.0")
-  override def logLikelihood(dataset: DataFrame): Double = {
-    if (oldLocalModel.isEmpty) {
-      oldLocalModel = Some(oldDistributedModel.toLocal)
-    }
-    super.logLikelihood(dataset)
-  }
-
-  @Since("1.6.0")
-  override def logPerplexity(dataset: DataFrame): Double = {
-    if (oldLocalModel.isEmpty) {
-      oldLocalModel = Some(oldDistributedModel.toLocal)
-    }
-    super.logPerplexity(dataset)
-  }
-
   /**
    * Log likelihood of the observed tokens in the training set,
    * given the current parameter estimates:
@@ -673,9 +681,9 @@ class LDA @Since("1.6.0") (
     val oldModel = oldLDA.run(oldData)
     val newModel = oldModel match {
       case m: OldLocalLDAModel =>
-        new LDAModel(uid, m.vocabSize, Some(m), dataset.sqlContext)
+        new LocalLDAModel(uid, m.vocabSize, m, dataset.sqlContext)
       case m: OldDistributedLDAModel =>
-        new DistributedLDAModel(uid, m.vocabSize, m, dataset.sqlContext)
+        new DistributedLDAModel(uid, m.vocabSize, m, dataset.sqlContext, None)
     }
     copyValues(newModel).setParent(this)
   }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
index edb927495e8b..b634d31cc34f 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
@@ -156,7 +156,7 @@ class LDASuite extends SparkFunSuite with MLlibTestSparkContext {
 
     MLTestingUtils.checkCopy(model)
 
-    assert(!model.isInstanceOf[DistributedLDAModel])
+    assert(model.isInstanceOf[LocalLDAModel])
     assert(model.vocabSize === vocabSize)
     assert(model.estimatedDocConcentration.size === k)
     assert(model.topicsMatrix.numRows === vocabSize)
@@ -210,7 +210,7 @@ class LDASuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(model.isDistributed)
 
     val localModel = model.toLocal
-    assert(!localModel.isInstanceOf[DistributedLDAModel])
+    assert(localModel.isInstanceOf[LocalLDAModel])
 
     // training logLikelihood, logPrior
     val ll = model.trainingLogLikelihood

From 41bbd2300472501d69ed46f0407d5ed7cbede4a8 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Thu, 12 Nov 2015 17:20:30 -0800
Subject: [PATCH 660/896] [SPARK-11654][SQL] add reduce to GroupedDataset

This PR adds a new method, `reduce`, to `GroupedDataset`, which allows similar operations to `reduceByKey` on a traditional `PairRDD`.

```scala
val ds = Seq("abc", "xyz", "hello").toDS()
ds.groupBy(_.length).reduce(_ + _).collect()  // not actually commutative :P

res0: Array(3 -> "abcxyz", 5 -> "hello")
```

While implementing this method and its test cases several more deficiencies were found in our encoder handling.  Specifically, in order to support positional resolution, named resolution and tuple composition, it is important to keep the unresolved encoder around and to use it when constructing new `Datasets` with the same object type but different output attributes.  We now divide the encoder lifecycle into three phases (that mirror the lifecycle of standard expressions) and have checks at various boundaries:

 - Unresoved Encoders: all users facing encoders (those constructed by implicits, static methods, or tuple composition) are unresolved, meaning they have only `UnresolvedAttributes` for named fields and `BoundReferences` for fields accessed by ordinal.
 - Resolved Encoders: internal to a `[Grouped]Dataset` the encoder is resolved, meaning all input has been resolved to a specific `AttributeReference`.  Any encoders that are placed into a logical plan for use in object construction should be resolved.
 - BoundEncoder: Are constructed by physical plans, right before actual conversion from row -> object is performed.

It is left to future work to add explicit checks for resolution and provide good error messages when it fails.  We might also consider enforcing the above constraints in the type system (i.e. `fromRow` only exists on a `ResolvedEncoder`), but we should probably wait before spending too much time on this.

Author: Michael Armbrust <michael@databricks.com>
Author: Wenchen Fan <wenchen@databricks.com>

Closes #9673 from marmbrus/pr/9628.
---
 .../scala/org/apache/spark/sql/Encoder.scala  |  10 +-
 .../catalyst/encoders/ExpressionEncoder.scala | 124 ++++++++++--------
 .../spark/sql/catalyst/encoders/package.scala |  11 +-
 .../expressions/complexTypeExtractors.scala   |   7 +-
 .../plans/logical/basicOperators.scala        |  15 ++-
 .../scala/org/apache/spark/sql/Column.scala   |  43 +++++-
 .../org/apache/spark/sql/DataFrame.scala      |  17 +--
 .../scala/org/apache/spark/sql/Dataset.scala  |  85 ++++++------
 .../org/apache/spark/sql/GroupedDataset.scala |  98 +++++++-------
 .../aggregate/TypedAggregateExpression.scala  |  13 +-
 .../spark/sql/execution/basicOperators.scala  |   7 +-
 .../apache/spark/sql/JavaDatasetSuite.java    |  12 +-
 .../spark/sql/DatasetAggregatorSuite.scala    |  42 ++++++
 .../org/apache/spark/sql/DatasetSuite.scala   |   9 ++
 .../org/apache/spark/sql/QueryTest.scala      |  13 +-
 15 files changed, 309 insertions(+), 197 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 6134f9e03663..5f619d6c339e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -84,7 +84,7 @@ object Encoders {
   private def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
     assert(encoders.length > 1)
     // make sure all encoders are resolved, i.e. `Attribute` has been resolved to `BoundReference`.
-    assert(encoders.forall(_.constructExpression.find(_.isInstanceOf[Attribute]).isEmpty))
+    assert(encoders.forall(_.fromRowExpression.find(_.isInstanceOf[Attribute]).isEmpty))
 
     val schema = StructType(encoders.zipWithIndex.map {
       case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
@@ -93,8 +93,8 @@ object Encoders {
     val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
 
     val extractExpressions = encoders.map {
-      case e if e.flat => e.extractExpressions.head
-      case other => CreateStruct(other.extractExpressions)
+      case e if e.flat => e.toRowExpressions.head
+      case other => CreateStruct(other.toRowExpressions)
     }.zipWithIndex.map { case (expr, index) =>
       expr.transformUp {
         case BoundReference(0, t: ObjectType, _) =>
@@ -107,11 +107,11 @@ object Encoders {
 
     val constructExpressions = encoders.zipWithIndex.map { case (enc, index) =>
       if (enc.flat) {
-        enc.constructExpression.transform {
+        enc.fromRowExpression.transform {
           case b: BoundReference => b.copy(ordinal = index)
         }
       } else {
-        enc.constructExpression.transformUp {
+        enc.fromRowExpression.transformUp {
           case BoundReference(ordinal, dt, _) =>
             GetInternalRowField(BoundReference(index, enc.schema, nullable = true), ordinal, dt)
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 294afde5347e..0d3e4aafb0af 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -28,7 +28,7 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.ScalaReflection
-import org.apache.spark.sql.types.{StructField, ObjectType, StructType}
+import org.apache.spark.sql.types.{NullType, StructField, ObjectType, StructType}
 
 /**
  * A factory for constructing encoders that convert objects and primitves to and from the
@@ -61,20 +61,39 @@ object ExpressionEncoder {
 
   /**
    * Given a set of N encoders, constructs a new encoder that produce objects as items in an
-   * N-tuple.  Note that these encoders should first be bound correctly to the combined input
-   * schema.
+   * N-tuple.  Note that these encoders should be unresolved so that information about
+   * name/positional binding is preserved.
    */
   def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
+    encoders.foreach(_.assertUnresolved())
+
     val schema =
       StructType(
-        encoders.zipWithIndex.map { case (e, i) => StructField(s"_${i + 1}", e.schema)})
+        encoders.zipWithIndex.map {
+          case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
+        })
     val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
-    val extractExpressions = encoders.map {
-      case e if e.flat => e.extractExpressions.head
-      case other => CreateStruct(other.extractExpressions)
+
+    // Rebind the encoders to the nested schema.
+    val newConstructExpressions = encoders.zipWithIndex.map {
+      case (e, i) if !e.flat => e.nested(i).fromRowExpression
+      case (e, i) => e.shift(i).fromRowExpression
     }
+
     val constructExpression =
-      NewInstance(cls, encoders.map(_.constructExpression), false, ObjectType(cls))
+      NewInstance(cls, newConstructExpressions, false, ObjectType(cls))
+
+    val input = BoundReference(0, ObjectType(cls), false)
+    val extractExpressions = encoders.zipWithIndex.map {
+      case (e, i) if !e.flat => CreateStruct(e.toRowExpressions.map(_ transformUp {
+        case b: BoundReference =>
+          Invoke(input, s"_${i + 1}", b.dataType, Nil)
+      }))
+      case (e, i) => e.toRowExpressions.head transformUp {
+        case b: BoundReference =>
+          Invoke(input, s"_${i + 1}", b.dataType, Nil)
+      }
+    }
 
     new ExpressionEncoder[Any](
       schema,
@@ -95,35 +114,40 @@ object ExpressionEncoder {
  * A generic encoder for JVM objects.
  *
  * @param schema The schema after converting `T` to a Spark SQL row.
- * @param extractExpressions A set of expressions, one for each top-level field that can be used to
- *                           extract the values from a raw object.
+ * @param toRowExpressions A set of expressions, one for each top-level field that can be used to
+ *                           extract the values from a raw object into an [[InternalRow]].
+ * @param fromRowExpression An expression that will construct an object given an [[InternalRow]].
  * @param clsTag A classtag for `T`.
  */
 case class ExpressionEncoder[T](
     schema: StructType,
     flat: Boolean,
-    extractExpressions: Seq[Expression],
-    constructExpression: Expression,
+    toRowExpressions: Seq[Expression],
+    fromRowExpression: Expression,
     clsTag: ClassTag[T])
   extends Encoder[T] {
 
-  if (flat) require(extractExpressions.size == 1)
+  if (flat) require(toRowExpressions.size == 1)
 
   @transient
-  private lazy val extractProjection = GenerateUnsafeProjection.generate(extractExpressions)
+  private lazy val extractProjection = GenerateUnsafeProjection.generate(toRowExpressions)
   private val inputRow = new GenericMutableRow(1)
 
   @transient
-  private lazy val constructProjection = GenerateSafeProjection.generate(constructExpression :: Nil)
+  private lazy val constructProjection = GenerateSafeProjection.generate(fromRowExpression :: Nil)
 
   /**
    * Returns an encoded version of `t` as a Spark SQL row.  Note that multiple calls to
    * toRow are allowed to return the same actual [[InternalRow]] object.  Thus, the caller should
    * copy the result before making another call if required.
    */
-  def toRow(t: T): InternalRow = {
+  def toRow(t: T): InternalRow = try {
     inputRow(0) = t
     extractProjection(inputRow)
+  } catch {
+    case e: Exception =>
+      throw new RuntimeException(
+        s"Error while encoding: $e\n${toRowExpressions.map(_.treeString).mkString("\n")}", e)
   }
 
   /**
@@ -135,7 +159,20 @@ case class ExpressionEncoder[T](
     constructProjection(row).get(0, ObjectType(clsTag.runtimeClass)).asInstanceOf[T]
   } catch {
     case e: Exception =>
-      throw new RuntimeException(s"Error while decoding: $e\n${constructExpression.treeString}", e)
+      throw new RuntimeException(s"Error while decoding: $e\n${fromRowExpression.treeString}", e)
+  }
+
+  /**
+   * The process of resolution to a given schema throws away information about where a given field
+   * is being bound by ordinal instead of by name.  This method checks to make sure this process
+   * has not been done already in places where we plan to do later composition of encoders.
+   */
+  def assertUnresolved(): Unit = {
+    (fromRowExpression +:  toRowExpressions).foreach(_.foreach {
+      case a: AttributeReference =>
+        sys.error(s"Unresolved encoder expected, but $a was found.")
+      case _ =>
+    })
   }
 
   /**
@@ -143,9 +180,14 @@ case class ExpressionEncoder[T](
    * given schema.
    */
   def resolve(schema: Seq[Attribute]): ExpressionEncoder[T] = {
-    val plan = Project(Alias(constructExpression, "")() :: Nil, LocalRelation(schema))
+    val positionToAttribute = AttributeMap.toIndex(schema)
+    val unbound = fromRowExpression transform {
+      case b: BoundReference => positionToAttribute(b.ordinal)
+    }
+
+    val plan = Project(Alias(unbound, "")() :: Nil, LocalRelation(schema))
     val analyzedPlan = SimpleAnalyzer.execute(plan)
-    copy(constructExpression = analyzedPlan.expressions.head.children.head)
+    copy(fromRowExpression = analyzedPlan.expressions.head.children.head)
   }
 
   /**
@@ -154,39 +196,14 @@ case class ExpressionEncoder[T](
    * resolve before bind.
    */
   def bind(schema: Seq[Attribute]): ExpressionEncoder[T] = {
-    copy(constructExpression = BindReferences.bindReference(constructExpression, schema))
-  }
-
-  /**
-   * Replaces any bound references in the schema with the attributes at the corresponding ordinal
-   * in the provided schema.  This can be used to "relocate" a given encoder to pull values from
-   * a different schema than it was initially bound to.  It can also be used to assign attributes
-   * to ordinal based extraction (i.e. because the input data was a tuple).
-   */
-  def unbind(schema: Seq[Attribute]): ExpressionEncoder[T] = {
-    val positionToAttribute = AttributeMap.toIndex(schema)
-    copy(constructExpression = constructExpression transform {
-      case b: BoundReference => positionToAttribute(b.ordinal)
-    })
+    copy(fromRowExpression = BindReferences.bindReference(fromRowExpression, schema))
   }
 
   /**
-   * Given an encoder that has already been bound to a given schema, returns a new encoder
-   * where the positions are mapped from `oldSchema` to `newSchema`.  This can be used, for example,
-   * when you are trying to use an encoder on grouping keys that were originally part of a larger
-   * row, but now you have projected out only the key expressions.
+   * Returns a new encoder with input columns shifted by `delta` ordinals
    */
-  def rebind(oldSchema: Seq[Attribute], newSchema: Seq[Attribute]): ExpressionEncoder[T] = {
-    val positionToAttribute = AttributeMap.toIndex(oldSchema)
-    val attributeToNewPosition = AttributeMap.byIndex(newSchema)
-    copy(constructExpression = constructExpression transform {
-      case r: BoundReference =>
-        r.copy(ordinal = attributeToNewPosition(positionToAttribute(r.ordinal)))
-    })
-  }
-
   def shift(delta: Int): ExpressionEncoder[T] = {
-    copy(constructExpression = constructExpression transform {
+    copy(fromRowExpression = fromRowExpression transform {
       case r: BoundReference => r.copy(ordinal = r.ordinal + delta)
     })
   }
@@ -196,11 +213,14 @@ case class ExpressionEncoder[T](
    * input row have been modified to pull the object out from a nested struct, instead of the
    * top level fields.
    */
-  def nested(input: Expression = BoundReference(0, schema, true)): ExpressionEncoder[T] = {
-    copy(constructExpression = constructExpression transform {
-      case u: Attribute if u != input =>
+  private def nested(i: Int): ExpressionEncoder[T] = {
+    // We don't always know our input type at this point since it might be unresolved.
+    // We fill in null and it will get unbound to the actual attribute at this position.
+    val input = BoundReference(i, NullType, nullable = true)
+    copy(fromRowExpression = fromRowExpression transformUp {
+      case u: Attribute =>
         UnresolvedExtractValue(input, Literal(u.name))
-      case b: BoundReference if b != input =>
+      case b: BoundReference =>
         GetStructField(
           input,
           StructField(s"i[${b.ordinal}]", b.dataType),
@@ -208,7 +228,7 @@ case class ExpressionEncoder[T](
     })
   }
 
-  protected val attrs = extractExpressions.flatMap(_.collect {
+  protected val attrs = toRowExpressions.flatMap(_.collect {
     case _: UnresolvedAttribute => ""
     case a: Attribute => s"#${a.exprId}"
     case b: BoundReference => s"[${b.ordinal}]"
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
index 2c35adca9c92..9e283f5eb634 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/package.scala
@@ -18,10 +18,19 @@
 package org.apache.spark.sql.catalyst
 
 import org.apache.spark.sql.Encoder
+import org.apache.spark.sql.catalyst.expressions.AttributeReference
 
 package object encoders {
+  /**
+   * Returns an internal encoder object that can be used to serialize / deserialize JVM objects
+   * into Spark SQL rows.  The implicit encoder should always be unresolved (i.e. have no attribute
+   * references from a specific schema.)  This requirement allows us to preserve whether a given
+   * object type is being bound by name or by ordinal when doing resolution.
+   */
   private[sql] def encoderFor[A : Encoder]: ExpressionEncoder[A] = implicitly[Encoder[A]] match {
-    case e: ExpressionEncoder[A] => e
+    case e: ExpressionEncoder[A] =>
+      e.assertUnresolved()
+      e
     case _ => sys.error(s"Only expression encoders are supported today")
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
index 41cd0a104a1f..f871b737fff3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
@@ -97,11 +97,16 @@ object ExtractValue {
  * Returns the value of fields in the Struct `child`.
  *
  * No need to do type checking since it is handled by [[ExtractValue]].
+ * TODO: Unify with [[GetInternalRowField]], remove the need to specify a [[StructField]].
  */
 case class GetStructField(child: Expression, field: StructField, ordinal: Int)
   extends UnaryExpression {
 
-  override def dataType: DataType = field.dataType
+  override def dataType: DataType = child.dataType match {
+    case s: StructType => s(ordinal).dataType
+    // This is a hack to avoid breaking existing code until we remove the need for the struct field
+    case _ => field.dataType
+  }
   override def nullable: Boolean = child.nullable || field.nullable
   override def toString: String = s"$child.${field.name}"
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 32b09b59af43..d9f046efce0b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -483,9 +483,12 @@ case class MapPartitions[T, U](
 
 /** Factory for constructing new `AppendColumn` nodes. */
 object AppendColumn {
-  def apply[T : Encoder, U : Encoder](func: T => U, child: LogicalPlan): AppendColumn[T, U] = {
+  def apply[T, U : Encoder](
+      func: T => U,
+      tEncoder: ExpressionEncoder[T],
+      child: LogicalPlan): AppendColumn[T, U] = {
     val attrs = encoderFor[U].schema.toAttributes
-    new AppendColumn[T, U](func, encoderFor[T], encoderFor[U], attrs, child)
+    new AppendColumn[T, U](func, tEncoder, encoderFor[U], attrs, child)
   }
 }
 
@@ -506,14 +509,16 @@ case class AppendColumn[T, U](
 
 /** Factory for constructing new `MapGroups` nodes. */
 object MapGroups {
-  def apply[K : Encoder, T : Encoder, U : Encoder](
+  def apply[K, T, U : Encoder](
       func: (K, Iterator[T]) => TraversableOnce[U],
+      kEncoder: ExpressionEncoder[K],
+      tEncoder: ExpressionEncoder[T],
       groupingAttributes: Seq[Attribute],
       child: LogicalPlan): MapGroups[K, T, U] = {
     new MapGroups(
       func,
-      encoderFor[K],
-      encoderFor[T],
+      kEncoder,
+      tEncoder,
       encoderFor[U],
       groupingAttributes,
       encoderFor[U].schema.toAttributes,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index f0f275e91f1a..929224460dc0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -17,13 +17,15 @@
 
 package org.apache.spark.sql
 
+import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
+
 import scala.language.implicitConversions
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.Logging
 import org.apache.spark.sql.functions.lit
 import org.apache.spark.sql.catalyst.analysis._
-import org.apache.spark.sql.catalyst.encoders.encoderFor
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.util.DataTypeParser
 import org.apache.spark.sql.types._
@@ -45,7 +47,25 @@ private[sql] object Column {
  *           checked by the analyzer instead of the compiler (i.e. `expr("sum(...)")`).
  * @tparam U The output type of this column.
  */
-class TypedColumn[-T, U](expr: Expression, val encoder: Encoder[U]) extends Column(expr)
+class TypedColumn[-T, U](
+    expr: Expression,
+    private[sql] val encoder: ExpressionEncoder[U]) extends Column(expr) {
+
+  /**
+   * Inserts the specific input type and schema into any expressions that are expected to operate
+   * on a decoded object.
+   */
+  private[sql] def withInputType(
+      inputEncoder: ExpressionEncoder[_],
+      schema: Seq[Attribute]): TypedColumn[T, U] = {
+    new TypedColumn[T, U] (expr transform {
+      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
+        ta.copy(
+          aEncoder = Some(inputEncoder.asInstanceOf[ExpressionEncoder[Any]]),
+          children = schema)
+    }, encoder)
+  }
+}
 
 /**
  * :: Experimental ::
@@ -73,6 +93,25 @@ class Column(protected[sql] val expr: Expression) extends Logging {
   /** Creates a column based on the given expression. */
   private def withExpr(newExpr: Expression): Column = new Column(newExpr)
 
+  /**
+   * Returns the expression for this column either with an existing or auto assigned name.
+   */
+  private[sql] def named: NamedExpression = expr match {
+    // Wrap UnresolvedAttribute with UnresolvedAlias, as when we resolve UnresolvedAttribute, we
+    // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
+    // make it a NamedExpression.
+    case u: UnresolvedAttribute => UnresolvedAlias(u)
+
+    case expr: NamedExpression => expr
+
+    // Leave an unaliased generator with an empty list of names since the analyzer will generate
+    // the correct defaults after the nested expression's type has been resolved.
+    case explode: Explode => MultiAlias(explode, Nil)
+    case jt: JsonTuple => MultiAlias(jt, Nil)
+
+    case expr: Expression => Alias(expr, expr.prettyString)()
+  }
+
   override def toString: String = expr.prettyString
 
   override def equals(that: Any): Boolean = that match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index a492099b9392..3ba4ba18d212 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -735,22 +735,7 @@ class DataFrame private[sql](
    */
   @scala.annotation.varargs
   def select(cols: Column*): DataFrame = withPlan {
-    val namedExpressions = cols.map {
-      // Wrap UnresolvedAttribute with UnresolvedAlias, as when we resolve UnresolvedAttribute, we
-      // will remove intermediate Alias for ExtractValue chain, and we need to alias it again to
-      // make it a NamedExpression.
-      case Column(u: UnresolvedAttribute) => UnresolvedAlias(u)
-
-      case Column(expr: NamedExpression) => expr
-
-      // Leave an unaliased generator with an empty list of names since the analyzer will generate
-      // the correct defaults after the nested expression's type has been resolved.
-      case Column(explode: Explode) => MultiAlias(explode, Nil)
-      case Column(jt: JsonTuple) => MultiAlias(jt, Nil)
-
-      case Column(expr: Expression) => Alias(expr, expr.prettyString)()
-    }
-    Project(namedExpressions.toSeq, logicalPlan)
+    Project(cols.map(_.named), logicalPlan)
   }
 
   /**
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 87dae6b33159..b930e4661c1a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -29,7 +29,6 @@ import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.{Queryable, QueryExecution}
-import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.types.StructType
 
 /**
@@ -63,15 +62,20 @@ import org.apache.spark.sql.types.StructType
 class Dataset[T] private[sql](
     @transient val sqlContext: SQLContext,
     @transient val queryExecution: QueryExecution,
-    unresolvedEncoder: Encoder[T]) extends Queryable with Serializable {
+    tEncoder: Encoder[T]) extends Queryable with Serializable {
+
+  /**
+   * An unresolved version of the internal encoder for the type of this dataset.  This one is marked
+   * implicit so that we can use it when constructing new [[Dataset]] objects that have the same
+   * object type (that will be possibly resolved to a different schema).
+   */
+  private implicit val unresolvedTEncoder: ExpressionEncoder[T] = encoderFor(tEncoder)
 
   /** The encoder for this [[Dataset]] that has been resolved to its output schema. */
-  private[sql] implicit val encoder: ExpressionEncoder[T] = unresolvedEncoder match {
-    case e: ExpressionEncoder[T] => e.resolve(queryExecution.analyzed.output)
-    case _ => throw new IllegalArgumentException("Only expression encoders are currently supported")
-  }
+  private[sql] val resolvedTEncoder: ExpressionEncoder[T] =
+    unresolvedTEncoder.resolve(queryExecution.analyzed.output)
 
-  private implicit def classTag = encoder.clsTag
+  private implicit def classTag = resolvedTEncoder.clsTag
 
   private[sql] def this(sqlContext: SQLContext, plan: LogicalPlan)(implicit encoder: Encoder[T]) =
     this(sqlContext, new QueryExecution(sqlContext, plan), encoder)
@@ -81,7 +85,7 @@ class Dataset[T] private[sql](
    *
    * @since 1.6.0
    */
-  def schema: StructType = encoder.schema
+  def schema: StructType = resolvedTEncoder.schema
 
   /* ************* *
    *  Conversions  *
@@ -134,7 +138,7 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def rdd: RDD[T] = {
-    val tEnc = encoderFor[T]
+    val tEnc = resolvedTEncoder
     val input = queryExecution.analyzed.output
     queryExecution.toRdd.mapPartitions { iter =>
       val bound = tEnc.bind(input)
@@ -195,7 +199,7 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def mapPartitions[U : Encoder](func: Iterator[T] => Iterator[U]): Dataset[U] = {
-    new Dataset(
+    new Dataset[U](
       sqlContext,
       MapPartitions[T, U](
         func,
@@ -295,12 +299,12 @@ class Dataset[T] private[sql](
    */
   def groupBy[K : Encoder](func: T => K): GroupedDataset[K, T] = {
     val inputPlan = queryExecution.analyzed
-    val withGroupingKey = AppendColumn(func, inputPlan)
+    val withGroupingKey = AppendColumn(func, resolvedTEncoder, inputPlan)
     val executed = sqlContext.executePlan(withGroupingKey)
 
     new GroupedDataset(
-      encoderFor[K].resolve(withGroupingKey.newColumns),
-      encoderFor[T].bind(inputPlan.output),
+      encoderFor[K],
+      encoderFor[T],
       executed,
       inputPlan.output,
       withGroupingKey.newColumns)
@@ -360,7 +364,15 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1: Encoder](c1: TypedColumn[T, U1]): Dataset[U1] = {
-    new Dataset[U1](sqlContext, Project(Alias(withEncoder(c1).expr, "_1")() :: Nil, logicalPlan))
+    // We use an unbound encoder since the expression will make up its own schema.
+    // TODO: This probably doesn't work if we are relying on reordering of the input class fields.
+    new Dataset[U1](
+      sqlContext,
+      Project(
+        c1.withInputType(
+          resolvedTEncoder.bind(queryExecution.analyzed.output),
+          queryExecution.analyzed.output).named :: Nil,
+        logicalPlan))
   }
 
   /**
@@ -369,28 +381,14 @@ class Dataset[T] private[sql](
    * that cast appropriately for the user facing interface.
    */
   protected def selectUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
-    val withEncoders = columns.map(withEncoder)
-    val aliases = withEncoders.zipWithIndex.map { case (c, i) => Alias(c.expr, s"_${i + 1}")() }
-    val unresolvedPlan = Project(aliases, logicalPlan)
-    val execution = new QueryExecution(sqlContext, unresolvedPlan)
-    // Rebind the encoders to the nested schema that will be produced by the select.
-    val encoders = withEncoders.map(_.encoder.asInstanceOf[ExpressionEncoder[_]]).zip(aliases).map {
-      case (e: ExpressionEncoder[_], a) if !e.flat =>
-        e.nested(a.toAttribute).resolve(execution.analyzed.output)
-      case (e, a) =>
-        e.unbind(a.toAttribute :: Nil).resolve(execution.analyzed.output)
-    }
-    new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
-  }
+    val encoders = columns.map(_.encoder)
+    // We use an unbound encoder since the expression will make up its own schema.
+    // TODO: This probably doesn't work if we are relying on reordering of the input class fields.
+    val namedColumns =
+      columns.map(_.withInputType(unresolvedTEncoder, queryExecution.analyzed.output).named)
+    val execution = new QueryExecution(sqlContext, Project(namedColumns, logicalPlan))
 
-  private def withEncoder(c: TypedColumn[_, _]): TypedColumn[_, _] = {
-    val e = c.expr transform {
-      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
-        ta.copy(
-          aEncoder = Some(encoder.asInstanceOf[ExpressionEncoder[Any]]),
-          children = queryExecution.analyzed.output)
-    }
-    new TypedColumn(e, c.encoder)
+    new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
   }
 
   /**
@@ -497,23 +495,18 @@ class Dataset[T] private[sql](
     val left = this.logicalPlan
     val right = other.logicalPlan
 
-    val leftData = this.encoder match {
+    val leftData = this.unresolvedTEncoder match {
       case e if e.flat => Alias(left.output.head, "_1")()
       case _ => Alias(CreateStruct(left.output), "_1")()
     }
-    val rightData = other.encoder match {
+    val rightData = other.unresolvedTEncoder match {
       case e if e.flat => Alias(right.output.head, "_2")()
       case _ => Alias(CreateStruct(right.output), "_2")()
     }
-    val leftEncoder =
-      if (encoder.flat) encoder else encoder.nested(leftData.toAttribute)
-    val rightEncoder =
-      if (other.encoder.flat) other.encoder else other.encoder.nested(rightData.toAttribute)
-    implicit val tuple2Encoder: Encoder[(T, U)] =
-      ExpressionEncoder.tuple(
-        leftEncoder,
-        rightEncoder.rebind(right.output, left.output ++ right.output))
 
+
+    implicit val tuple2Encoder: Encoder[(T, U)] =
+      ExpressionEncoder.tuple(this.unresolvedTEncoder, other.unresolvedTEncoder)
     withPlan[(T, U)](other) { (left, right) =>
       Project(
         leftData :: rightData :: Nil,
@@ -580,7 +573,7 @@ class Dataset[T] private[sql](
   private[sql] def logicalPlan = queryExecution.analyzed
 
   private[sql] def withPlan(f: LogicalPlan => LogicalPlan): Dataset[T] =
-    new Dataset[T](sqlContext, sqlContext.executePlan(f(logicalPlan)), encoder)
+    new Dataset[T](sqlContext, sqlContext.executePlan(f(logicalPlan)), tEncoder)
 
   private[sql] def withPlan[R : Encoder](
       other: Dataset[_])(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 61e2a9545069..ae1272ae531f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -17,20 +17,16 @@
 
 package org.apache.spark.sql
 
-import java.util.{Iterator => JIterator}
 
 import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.api.java.function.{Function2 => JFunction2, Function3 => JFunction3, _}
-import org.apache.spark.sql.catalyst.analysis.{UnresolvedAlias, UnresolvedAttribute}
+import org.apache.spark.api.java.function._
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
-import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, Alias, Attribute}
+import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
 import org.apache.spark.sql.execution.QueryExecution
 
-
 /**
  * :: Experimental ::
  * A [[Dataset]] has been logically grouped by a user specified grouping key.  Users should not
@@ -44,23 +40,21 @@ import org.apache.spark.sql.execution.QueryExecution
  */
 @Experimental
 class GroupedDataset[K, T] private[sql](
-    private val kEncoder: Encoder[K],
-    private val tEncoder: Encoder[T],
-    queryExecution: QueryExecution,
+    kEncoder: Encoder[K],
+    tEncoder: Encoder[T],
+    val queryExecution: QueryExecution,
     private val dataAttributes: Seq[Attribute],
     private val groupingAttributes: Seq[Attribute]) extends Serializable {
 
-  private implicit val kEnc = kEncoder match {
-    case e: ExpressionEncoder[K] => e.unbind(groupingAttributes).resolve(groupingAttributes)
-    case other =>
-      throw new UnsupportedOperationException("Only expression encoders are currently supported")
-  }
+  // Similar to [[Dataset]], we use unresolved encoders for later composition and resolved encoders
+  // when constructing new logical plans that will operate on the output of the current
+  // queryexecution.
 
-  private implicit val tEnc = tEncoder match {
-    case e: ExpressionEncoder[T] => e.resolve(dataAttributes)
-    case other =>
-      throw new UnsupportedOperationException("Only expression encoders are currently supported")
-  }
+  private implicit val unresolvedKEncoder = encoderFor(kEncoder)
+  private implicit val unresolvedTEncoder = encoderFor(tEncoder)
+
+  private val resolvedKEncoder = unresolvedKEncoder.resolve(groupingAttributes)
+  private val resolvedTEncoder = unresolvedTEncoder.resolve(dataAttributes)
 
   /** Encoders for built in aggregations. */
   private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
@@ -79,7 +73,7 @@ class GroupedDataset[K, T] private[sql](
   def asKey[L : Encoder]: GroupedDataset[L, T] =
     new GroupedDataset(
       encoderFor[L],
-      tEncoder,
+      unresolvedTEncoder,
       queryExecution,
       dataAttributes,
       groupingAttributes)
@@ -95,7 +89,7 @@ class GroupedDataset[K, T] private[sql](
   }
 
   /**
-   * Applies the given function to each group of data.  For each unique group, the function will
+   * Applies the given function to each group of data.  For each unique group, the function  will
    * be passed the group key and an iterator that contains all of the elements in the group. The
    * function can return an iterator containing elements of an arbitrary type which will be returned
    * as a new [[Dataset]].
@@ -108,7 +102,12 @@ class GroupedDataset[K, T] private[sql](
   def flatMap[U : Encoder](f: (K, Iterator[T]) => TraversableOnce[U]): Dataset[U] = {
     new Dataset[U](
       sqlContext,
-      MapGroups(f, groupingAttributes, logicalPlan))
+      MapGroups(
+        f,
+        resolvedKEncoder,
+        resolvedTEncoder,
+        groupingAttributes,
+        logicalPlan))
   }
 
   def flatMap[U](f: FlatMapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
@@ -127,15 +126,28 @@ class GroupedDataset[K, T] private[sql](
    */
   def map[U : Encoder](f: (K, Iterator[T]) => U): Dataset[U] = {
     val func = (key: K, it: Iterator[T]) => Iterator(f(key, it))
-    new Dataset[U](
-      sqlContext,
-      MapGroups(func, groupingAttributes, logicalPlan))
+    flatMap(func)
   }
 
   def map[U](f: MapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
     map((key, data) => f.call(key, data.asJava))(encoder)
   }
 
+  /**
+   * Reduces the elements of each group of data using the specified binary function.
+   * The given function must be commutative and associative or the result may be non-deterministic.
+   */
+  def reduce(f: (T, T) => T): Dataset[(K, T)] = {
+    val func = (key: K, it: Iterator[T]) => Iterator(key -> it.reduce(f))
+
+    implicit val resultEncoder = ExpressionEncoder.tuple(unresolvedKEncoder, unresolvedTEncoder)
+    flatMap(func)
+  }
+
+  def reduce(f: ReduceFunction[T]): Dataset[(K, T)] = {
+    reduce(f.call _)
+  }
+
   // To ensure valid overloading.
   protected def agg(expr: Column, exprs: Column*): DataFrame =
     groupedData.agg(expr, exprs: _*)
@@ -147,37 +159,17 @@ class GroupedDataset[K, T] private[sql](
    * TODO: does not handle aggrecations that return nonflat results,
    */
   protected def aggUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
-    val aliases = (groupingAttributes ++ columns.map(_.expr)).map {
-      case u: UnresolvedAttribute => UnresolvedAlias(u)
-      case expr: NamedExpression => expr
-      case expr: Expression => Alias(expr, expr.prettyString)()
-    }
-
-    val unresolvedPlan = Aggregate(groupingAttributes, aliases, logicalPlan)
-
-    // Fill in the input encoders for any aggregators in the plan.
-    val withEncoders = unresolvedPlan transformAllExpressions {
-      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
-        ta.copy(
-          aEncoder = Some(tEnc.asInstanceOf[ExpressionEncoder[Any]]),
-          children = dataAttributes)
-    }
-    val execution = new QueryExecution(sqlContext, withEncoders)
-
-    val columnEncoders = columns.map(_.encoder.asInstanceOf[ExpressionEncoder[_]])
-
-    // Rebind the encoders to the nested schema that will be produced by the aggregation.
-    val encoders = (kEnc +: columnEncoders).zip(execution.analyzed.output).map {
-      case (e: ExpressionEncoder[_], a) if !e.flat =>
-        e.nested(a).resolve(execution.analyzed.output)
-      case (e, a) =>
-        e.unbind(a :: Nil).resolve(execution.analyzed.output)
-    }
+    val encoders = columns.map(_.encoder)
+    val namedColumns =
+      columns.map(
+        _.withInputType(resolvedTEncoder.bind(dataAttributes), dataAttributes).named)
+    val aggregate = Aggregate(groupingAttributes, groupingAttributes ++ namedColumns, logicalPlan)
+    val execution = new QueryExecution(sqlContext, aggregate)
 
     new Dataset(
       sqlContext,
       execution,
-      ExpressionEncoder.tuple(encoders))
+      ExpressionEncoder.tuple(unresolvedKEncoder +: encoders))
   }
 
   /**
@@ -230,7 +222,7 @@ class GroupedDataset[K, T] private[sql](
   def cogroup[U, R : Encoder](
       other: GroupedDataset[K, U])(
       f: (K, Iterator[T], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
-    implicit def uEnc: Encoder[U] = other.tEncoder
+    implicit def uEnc: Encoder[U] = other.unresolvedTEncoder
     new Dataset[R](
       sqlContext,
       CoGroup(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index dfcbac8687b3..3f2775896bb8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -55,7 +55,7 @@ case class TypedAggregateExpression(
     aEncoder: Option[ExpressionEncoder[Any]],
     bEncoder: ExpressionEncoder[Any],
     cEncoder: ExpressionEncoder[Any],
-    children: Seq[Expression],
+    children: Seq[Attribute],
     mutableAggBufferOffset: Int,
     inputAggBufferOffset: Int)
   extends ImperativeAggregate with Logging {
@@ -78,8 +78,7 @@ case class TypedAggregateExpression(
 
   override lazy val resolved: Boolean = aEncoder.isDefined
 
-  override lazy val inputTypes: Seq[DataType] =
-    aEncoder.map(_.schema.map(_.dataType)).getOrElse(Nil)
+  override lazy val inputTypes: Seq[DataType] = Nil
 
   override val aggBufferSchema: StructType = bEncoder.schema
 
@@ -90,12 +89,8 @@ case class TypedAggregateExpression(
   override val inputAggBufferAttributes: Seq[AttributeReference] =
     aggBufferAttributes.map(_.newInstance())
 
-  lazy val inputAttributes = aEncoder.get.schema.toAttributes
-  lazy val inputMapping = AttributeMap(inputAttributes.zip(children))
-  lazy val boundA =
-    aEncoder.get.copy(constructExpression = aEncoder.get.constructExpression transform {
-      case a: AttributeReference => inputMapping(a)
-    })
+  // We let the dataset do the binding for us.
+  lazy val boundA = aEncoder.get
 
   val bAttributes = bEncoder.schema.toAttributes
   lazy val boundB = bEncoder.resolve(bAttributes).bind(bAttributes)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index ae08fb71bf4c..ed82c9a6a377 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -311,6 +311,10 @@ case class AppendColumns[T, U](
     newColumns: Seq[Attribute],
     child: SparkPlan) extends UnaryNode {
 
+  // We are using an unsafe combiner.
+  override def canProcessSafeRows: Boolean = false
+  override def canProcessUnsafeRows: Boolean = true
+
   override def output: Seq[Attribute] = child.output ++ newColumns
 
   override protected def doExecute(): RDD[InternalRow] = {
@@ -349,11 +353,12 @@ case class MapGroups[K, T, U](
     child.execute().mapPartitions { iter =>
       val grouped = GroupedIterator(iter, groupingAttributes, child.output)
       val groupKeyEncoder = kEncoder.bind(groupingAttributes)
+      val groupDataEncoder = tEncoder.bind(child.output)
 
       grouped.flatMap { case (key, rowIter) =>
         val result = func(
           groupKeyEncoder.fromRow(key),
-          rowIter.map(tEncoder.fromRow))
+          rowIter.map(groupDataEncoder.fromRow))
         result.map(uEncoder.toRow)
       }
     }
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 33d8388f615a..46169ca07d71 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -157,7 +157,6 @@ public Integer call(Integer v1, Integer v2) throws Exception {
     Assert.assertEquals(6, reduced);
   }
 
-  @Test
   public void testGroupBy() {
     List<String> data = Arrays.asList("a", "foo", "bar");
     Dataset<String> ds = context.createDataset(data, Encoders.STRING());
@@ -196,6 +195,17 @@ public Iterable<String> call(Integer key, Iterator<String> values) throws Except
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), flatMapped.collectAsList());
 
+    Dataset<Tuple2<Integer, String>> reduced = grouped.reduce(new ReduceFunction<String>() {
+      @Override
+      public String call(String v1, String v2) throws Exception {
+        return v1 + v2;
+      }
+    });
+
+    Assert.assertEquals(
+      Arrays.asList(tuple2(1, "a"), tuple2(3, "foobar")),
+      reduced.collectAsList());
+
     List<Integer> data2 = Arrays.asList(2, 6, 10);
     Dataset<Integer> ds2 = context.createDataset(data2, Encoders.INT());
     GroupedDataset<Integer, Integer> grouped2 = ds2.groupBy(new MapFunction<Integer, Integer>() {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 378cd365276b..20896efdfec1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -67,6 +67,28 @@ object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, L
   override def finish(reduction: (Long, Long)): (Long, Long) = reduction
 }
 
+case class AggData(a: Int, b: String)
+object ClassInputAgg extends Aggregator[AggData, Int, Int] with Serializable {
+  /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
+  override def zero: Int = 0
+
+  /**
+   * Combine two values to produce a new value.  For performance, the function may modify `b` and
+   * return it instead of constructing new object for b.
+   */
+  override def reduce(b: Int, a: AggData): Int = b + a.a
+
+  /**
+   * Transform the output of the reduction.
+   */
+  override def finish(reduction: Int): Int = reduction
+
+  /**
+   * Merge two intermediate values
+   */
+  override def merge(b1: Int, b2: Int): Int = b1 + b2
+}
+
 class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
 
   import testImplicits._
@@ -123,4 +145,24 @@ class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
       ds.select(sum((i: Int) => i), sum((i: Int) => i * 2)),
       11 -> 22)
   }
+
+  test("typed aggregation: class input") {
+    val ds = Seq(AggData(1, "one"), AggData(2, "two")).toDS()
+
+    checkAnswer(
+      ds.select(ClassInputAgg.toColumn),
+      3)
+  }
+
+  test("typed aggregation: class input with reordering") {
+    val ds = sql("SELECT 'one' AS b, 1 as a").as[AggData]
+
+    checkAnswer(
+      ds.select(ClassInputAgg.toColumn),
+      1)
+
+    checkAnswer(
+      ds.groupBy(_.b).agg(ClassInputAgg.toColumn),
+      ("one", 1))
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 621148528714..c23dd46d3767 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -218,6 +218,15 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       "a", "30", "b", "3", "c", "1")
   }
 
+  test("groupBy function, reduce") {
+    val ds = Seq("abc", "xyz", "hello").toDS()
+    val agged = ds.groupBy(_.length).reduce(_ + _)
+
+    checkAnswer(
+      agged,
+      3 -> "abcxyz", 5 -> "hello")
+  }
+
   test("groupBy columns, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1")
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index 7a8b7ae5bf26..b5417b195f39 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -82,18 +82,21 @@ abstract class QueryTest extends PlanTest {
         fail(
           s"""
              |Exception collecting dataset as objects
-             |${ds.encoder}
-             |${ds.encoder.constructExpression.treeString}
+             |${ds.resolvedTEncoder}
+             |${ds.resolvedTEncoder.fromRowExpression.treeString}
              |${ds.queryExecution}
            """.stripMargin, e)
     }
 
     if (decoded != expectedAnswer.toSet) {
+      val expected = expectedAnswer.toSet.toSeq.map((a: Any) => a.toString).sorted
+      val actual = decoded.toSet.toSeq.map((a: Any) => a.toString).sorted
+
+      val comparision = sideBySide("expected" +: expected, "spark" +: actual).mkString("\n")
       fail(
         s"""Decoded objects do not match expected objects:
-           |Expected: ${expectedAnswer.toSet.toSeq.map((a: Any) => a.toString).sorted}
-            |Actual ${decoded.toSet.toSeq.map((a: Any) => a.toString).sorted}
-            |${ds.encoder.constructExpression.treeString}
+            |$comparision
+            |${ds.resolvedTEncoder.fromRowExpression.treeString}
          """.stripMargin)
     }
   }

From 0f1d00a905614bb5eebf260566dbcb831158d445 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Thu, 12 Nov 2015 17:48:43 -0800
Subject: [PATCH 661/896] [SPARK-11663][STREAMING] Add Java API for
 trackStateByKey

TODO
- [x] Add Java API
- [x] Add API tests
- [x] Add a function test

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9636 from zsxwing/java-track.
---
 .../spark/api/java/function/Function4.java    |  27 +++
 .../JavaStatefulNetworkWordCount.java         |  45 ++--
 .../streaming/StatefulNetworkWordCount.scala  |   2 +-
 .../apache/spark/streaming/Java8APISuite.java |  43 ++++
 .../org/apache/spark/streaming/State.scala    |  25 ++-
 .../apache/spark/streaming/StateSpec.scala    |  84 +++++--
 .../streaming/api/java/JavaPairDStream.scala  |  46 +++-
 .../api/java/JavaTrackStateDStream.scala      |  44 ++++
 .../streaming/dstream/TrackStateDStream.scala |   1 +
 .../spark/streaming/rdd/TrackStateRDD.scala   |   4 +-
 .../spark/streaming/util/StateMap.scala       |   6 +-
 .../streaming/JavaTrackStateByKeySuite.java   | 210 ++++++++++++++++++
 12 files changed, 485 insertions(+), 52 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/Function4.java
 create mode 100644 streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaTrackStateDStream.scala
 create mode 100644 streaming/src/test/java/org/apache/spark/streaming/JavaTrackStateByKeySuite.java

diff --git a/core/src/main/java/org/apache/spark/api/java/function/Function4.java b/core/src/main/java/org/apache/spark/api/java/function/Function4.java
new file mode 100644
index 000000000000..fd727d64863d
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/Function4.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * A four-argument function that takes arguments of type T1, T2, T3 and T4 and returns an R.
+ */
+public interface Function4<T1, T2, T3, T4, R> extends Serializable {
+  public R call(T1 v1, T2 v2, T3 v3, T4 v4) throws Exception;
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/streaming/JavaStatefulNetworkWordCount.java b/examples/src/main/java/org/apache/spark/examples/streaming/JavaStatefulNetworkWordCount.java
index 99b63a2590ae..c400e4237abe 100644
--- a/examples/src/main/java/org/apache/spark/examples/streaming/JavaStatefulNetworkWordCount.java
+++ b/examples/src/main/java/org/apache/spark/examples/streaming/JavaStatefulNetworkWordCount.java
@@ -26,18 +26,15 @@
 import com.google.common.base.Optional;
 import com.google.common.collect.Lists;
 
-import org.apache.spark.HashPartitioner;
 import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.function.*;
 import org.apache.spark.api.java.JavaPairRDD;
 import org.apache.spark.api.java.StorageLevels;
-import org.apache.spark.api.java.function.FlatMapFunction;
-import org.apache.spark.api.java.function.Function2;
-import org.apache.spark.api.java.function.PairFunction;
 import org.apache.spark.streaming.Durations;
-import org.apache.spark.streaming.api.java.JavaDStream;
-import org.apache.spark.streaming.api.java.JavaPairDStream;
-import org.apache.spark.streaming.api.java.JavaReceiverInputDStream;
-import org.apache.spark.streaming.api.java.JavaStreamingContext;
+import org.apache.spark.streaming.State;
+import org.apache.spark.streaming.StateSpec;
+import org.apache.spark.streaming.Time;
+import org.apache.spark.streaming.api.java.*;
 
 /**
  * Counts words cumulatively in UTF8 encoded, '\n' delimited text received from the network every
@@ -63,25 +60,12 @@ public static void main(String[] args) {
 
     StreamingExamples.setStreamingLogLevels();
 
-    // Update the cumulative count function
-    final Function2<List<Integer>, Optional<Integer>, Optional<Integer>> updateFunction =
-        new Function2<List<Integer>, Optional<Integer>, Optional<Integer>>() {
-          @Override
-          public Optional<Integer> call(List<Integer> values, Optional<Integer> state) {
-            Integer newSum = state.or(0);
-            for (Integer value : values) {
-              newSum += value;
-            }
-            return Optional.of(newSum);
-          }
-        };
-
     // Create the context with a 1 second batch size
     SparkConf sparkConf = new SparkConf().setAppName("JavaStatefulNetworkWordCount");
     JavaStreamingContext ssc = new JavaStreamingContext(sparkConf, Durations.seconds(1));
     ssc.checkpoint(".");
 
-    // Initial RDD input to updateStateByKey
+    // Initial RDD input to trackStateByKey
     @SuppressWarnings("unchecked")
     List<Tuple2<String, Integer>> tuples = Arrays.asList(new Tuple2<String, Integer>("hello", 1),
             new Tuple2<String, Integer>("world", 1));
@@ -105,9 +89,22 @@ public Tuple2<String, Integer> call(String s) {
           }
         });
 
+    // Update the cumulative count function
+    final Function4<Time, String, Optional<Integer>, State<Integer>, Optional<Tuple2<String, Integer>>> trackStateFunc =
+        new Function4<Time, String, Optional<Integer>, State<Integer>, Optional<Tuple2<String, Integer>>>() {
+
+          @Override
+          public Optional<Tuple2<String, Integer>> call(Time time, String word, Optional<Integer> one, State<Integer> state) {
+            int sum = one.or(0) + (state.exists() ? state.get() : 0);
+            Tuple2<String, Integer> output = new Tuple2<String, Integer>(word, sum);
+            state.update(sum);
+            return Optional.of(output);
+          }
+        };
+
     // This will give a Dstream made of state (which is the cumulative count of the words)
-    JavaPairDStream<String, Integer> stateDstream = wordsDstream.updateStateByKey(updateFunction,
-            new HashPartitioner(ssc.sparkContext().defaultParallelism()), initialRDD);
+    JavaTrackStateDStream<String, Integer, Integer, Tuple2<String, Integer>> stateDstream =
+        wordsDstream.trackStateByKey(StateSpec.function(trackStateFunc).initialState(initialRDD));
 
     stateDstream.print();
     ssc.start();
diff --git a/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala b/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
index be2ae0b47336..a4f847f118b2 100644
--- a/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/streaming/StatefulNetworkWordCount.scala
@@ -49,7 +49,7 @@ object StatefulNetworkWordCount {
     val ssc = new StreamingContext(sparkConf, Seconds(1))
     ssc.checkpoint(".")
 
-    // Initial RDD input to updateStateByKey
+    // Initial RDD input to trackStateByKey
     val initialRDD = ssc.sparkContext.parallelize(List(("hello", 1), ("world", 1)))
 
     // Create a ReceiverInputDStream on target ip:port and count the
diff --git a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
index 73091cfe2c09..163ae92c12c6 100644
--- a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
+++ b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
@@ -31,9 +31,12 @@
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.api.java.JavaPairRDD;
 import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.function.Function4;
 import org.apache.spark.api.java.function.PairFunction;
 import org.apache.spark.streaming.api.java.JavaDStream;
 import org.apache.spark.streaming.api.java.JavaPairDStream;
+import org.apache.spark.streaming.api.java.JavaTrackStateDStream;
 
 /**
  * Most of these tests replicate org.apache.spark.streaming.JavaAPISuite using java 8
@@ -831,4 +834,44 @@ public void testFlatMapValues() {
     Assert.assertEquals(expected, result);
   }
 
+  /**
+   * This test is only for testing the APIs. It's not necessary to run it.
+   */
+  public void testTrackStateByAPI() {
+    JavaPairRDD<String, Boolean> initialRDD = null;
+    JavaPairDStream<String, Integer> wordsDstream = null;
+
+    JavaTrackStateDStream<String, Integer, Boolean, Double> stateDstream =
+        wordsDstream.trackStateByKey(
+            StateSpec.<String, Integer, Boolean, Double> function((time, key, value, state) -> {
+              // Use all State's methods here
+              state.exists();
+              state.get();
+              state.isTimingOut();
+              state.remove();
+              state.update(true);
+              return Optional.of(2.0);
+            }).initialState(initialRDD)
+                .numPartitions(10)
+                .partitioner(new HashPartitioner(10))
+                .timeout(Durations.seconds(10)));
+
+    JavaPairDStream<String, Boolean> emittedRecords = stateDstream.stateSnapshots();
+
+    JavaTrackStateDStream<String, Integer, Boolean, Double> stateDstream2 =
+        wordsDstream.trackStateByKey(
+            StateSpec.<String, Integer, Boolean, Double>function((value, state) -> {
+              state.exists();
+              state.get();
+              state.isTimingOut();
+              state.remove();
+              state.update(true);
+              return 2.0;
+            }).initialState(initialRDD)
+                .numPartitions(10)
+                .partitioner(new HashPartitioner(10))
+                .timeout(Durations.seconds(10)));
+
+    JavaPairDStream<String, Boolean> emittedRecords2 = stateDstream2.stateSnapshots();
+  }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/State.scala b/streaming/src/main/scala/org/apache/spark/streaming/State.scala
index 7dd1b72f8049..604e64fc6163 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/State.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/State.scala
@@ -50,9 +50,30 @@ import org.apache.spark.annotation.Experimental
  *
  * }}}
  *
- * Java example:
+ * Java example of using `State`:
  * {{{
- *      TODO(@zsxwing)
+ *    // A tracking function that maintains an integer state and return a String
+ *   Function2<Optional<Integer>, State<Integer>, Optional<String>> trackStateFunc =
+ *       new Function2<Optional<Integer>, State<Integer>, Optional<String>>() {
+ *
+ *         @Override
+ *         public Optional<String> call(Optional<Integer> one, State<Integer> state) {
+ *           if (state.exists()) {
+ *             int existingState = state.get(); // Get the existing state
+ *             boolean shouldRemove = ...; // Decide whether to remove the state
+ *             if (shouldRemove) {
+ *               state.remove(); // Remove the state
+ *             } else {
+ *               int newState = ...;
+ *               state.update(newState); // Set the new state
+ *             }
+ *           } else {
+ *             int initialState = ...; // Set the initial state
+ *             state.update(initialState);
+ *           }
+ *           // return something
+ *         }
+ *       };
  * }}}
  */
 @Experimental
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala b/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
index c9fe35e74c1c..bea5b9df20b5 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StateSpec.scala
@@ -17,15 +17,14 @@
 
 package org.apache.spark.streaming
 
-import scala.reflect.ClassTag
-
+import com.google.common.base.Optional
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.api.java.JavaPairRDD
+import org.apache.spark.api.java.{JavaPairRDD, JavaUtils}
+import org.apache.spark.api.java.function.{Function2 => JFunction2, Function4 => JFunction4}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.util.ClosureCleaner
 import org.apache.spark.{HashPartitioner, Partitioner}
 
-
 /**
  * :: Experimental ::
  * Abstract class representing all the specifications of the DStream transformation
@@ -49,12 +48,12 @@ import org.apache.spark.{HashPartitioner, Partitioner}
  *
  * Example in Java:
  * {{{
- *    StateStateSpec[KeyType, ValueType, StateType, EmittedDataType] spec =
- *      StateStateSpec.function[KeyType, ValueType, StateType, EmittedDataType](trackingFunction)
+ *    StateSpec<KeyType, ValueType, StateType, EmittedDataType> spec =
+ *      StateSpec.<KeyType, ValueType, StateType, EmittedDataType>function(trackingFunction)
  *                    .numPartition(10);
  *
- *    JavaDStream[EmittedDataType] emittedRecordDStream =
- *      javaPairDStream.trackStateByKey[StateType, EmittedDataType](spec);
+ *    JavaTrackStateDStream<KeyType, ValueType, StateType, EmittedType> emittedRecordDStream =
+ *      javaPairDStream.<StateType, EmittedDataType>trackStateByKey(spec);
  * }}}
  */
 @Experimental
@@ -92,6 +91,7 @@ sealed abstract class StateSpec[KeyType, ValueType, StateType, EmittedType] exte
 /**
  * :: Experimental ::
  * Builder object for creating instances of [[org.apache.spark.streaming.StateSpec StateSpec]]
+ * that is used for specifying the parameters of the DStream transformation `trackStateByKey`
  * that is used for specifying the parameters of the DStream transformation
  * `trackStateByKey` operation of a
  * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
@@ -103,28 +103,27 @@ sealed abstract class StateSpec[KeyType, ValueType, StateType, EmittedType] exte
  *      ...
  *    }
  *
- *    val spec = StateSpec.function(trackingFunction).numPartitions(10)
- *
- *    val emittedRecordDStream = keyValueDStream.trackStateByKey[StateType, EmittedDataType](spec)
+ *    val emittedRecordDStream = keyValueDStream.trackStateByKey[StateType, EmittedDataType](
+ *        StateSpec.function(trackingFunction).numPartitions(10))
  * }}}
  *
  * Example in Java:
  * {{{
- *    StateStateSpec[KeyType, ValueType, StateType, EmittedDataType] spec =
- *      StateStateSpec.function[KeyType, ValueType, StateType, EmittedDataType](trackingFunction)
+ *    StateSpec<KeyType, ValueType, StateType, EmittedDataType> spec =
+ *      StateSpec.<KeyType, ValueType, StateType, EmittedDataType>function(trackingFunction)
  *                    .numPartition(10);
  *
- *    JavaDStream[EmittedDataType] emittedRecordDStream =
- *      javaPairDStream.trackStateByKey[StateType, EmittedDataType](spec);
+ *    JavaTrackStateDStream<KeyType, ValueType, StateType, EmittedType> emittedRecordDStream =
+ *      javaPairDStream.<StateType, EmittedDataType>trackStateByKey(spec);
  * }}}
  */
 @Experimental
 object StateSpec {
   /**
    * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all the specifications
-   * `trackStateByKey` operation on a
-   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
-   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+   * of the `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]].
+   *
    * @param trackingFunction The function applied on every data item to manage the associated state
    *                         and generate the emitted data
    * @tparam KeyType      Class of the keys
@@ -141,9 +140,9 @@ object StateSpec {
 
   /**
    * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all the specifications
-   * `trackStateByKey` operation on a
-   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]] (Scala) or a
-   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]] (Java).
+   * of the `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.dstream.PairDStreamFunctions pair DStream]].
+   *
    * @param trackingFunction The function applied on every data item to manage the associated state
    *                         and generate the emitted data
    * @tparam ValueType    Class of the values
@@ -160,6 +159,48 @@ object StateSpec {
       }
     new StateSpecImpl(wrappedFunction)
   }
+
+  /**
+   * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all
+   * the specifications of the `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]].
+   *
+   * @param javaTrackingFunction The function applied on every data item to manage the associated
+   *                             state and generate the emitted data
+   * @tparam KeyType      Class of the keys
+   * @tparam ValueType    Class of the values
+   * @tparam StateType    Class of the states data
+   * @tparam EmittedType  Class of the emitted data
+   */
+  def function[KeyType, ValueType, StateType, EmittedType](javaTrackingFunction:
+      JFunction4[Time, KeyType, Optional[ValueType], State[StateType], Optional[EmittedType]]):
+    StateSpec[KeyType, ValueType, StateType, EmittedType] = {
+    val trackingFunc = (time: Time, k: KeyType, v: Option[ValueType], s: State[StateType]) => {
+      val t = javaTrackingFunction.call(time, k, JavaUtils.optionToOptional(v), s)
+      Option(t.orNull)
+    }
+    StateSpec.function(trackingFunc)
+  }
+
+  /**
+   * Create a [[org.apache.spark.streaming.StateSpec StateSpec]] for setting all the specifications
+   * of the `trackStateByKey` operation on a
+   * [[org.apache.spark.streaming.api.java.JavaPairDStream JavaPairDStream]].
+   *
+   * @param javaTrackingFunction The function applied on every data item to manage the associated
+   *                             state and generate the emitted data
+   * @tparam ValueType    Class of the values
+   * @tparam StateType    Class of the states data
+   * @tparam EmittedType  Class of the emitted data
+   */
+  def function[KeyType, ValueType, StateType, EmittedType](
+      javaTrackingFunction: JFunction2[Optional[ValueType], State[StateType], EmittedType]):
+    StateSpec[KeyType, ValueType, StateType, EmittedType] = {
+    val trackingFunc = (v: Option[ValueType], s: State[StateType]) => {
+      javaTrackingFunction.call(Optional.fromNullable(v.get), s)
+    }
+    StateSpec.function(trackingFunc)
+  }
 }
 
 
@@ -184,7 +225,6 @@ case class StateSpecImpl[K, V, S, T](
     this
   }
 
-
   override def numPartitions(numPartitions: Int): this.type = {
     this.partitioner(new HashPartitioner(numPartitions))
     this
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairDStream.scala
index e2aec6c2f63e..70e32b383e45 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaPairDStream.scala
@@ -28,8 +28,10 @@ import com.google.common.base.Optional
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.mapred.{JobConf, OutputFormat}
 import org.apache.hadoop.mapreduce.{OutputFormat => NewOutputFormat}
+
 import org.apache.spark.Partitioner
-import org.apache.spark.api.java.{JavaPairRDD, JavaUtils}
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.api.java.{JavaPairRDD, JavaSparkContext, JavaUtils}
 import org.apache.spark.api.java.JavaPairRDD._
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
 import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2}
@@ -426,6 +428,48 @@ class JavaPairDStream[K, V](val dstream: DStream[(K, V)])(
     )
   }
 
+  /**
+   * :: Experimental ::
+   * Return a new [[JavaDStream]] of data generated by combining the key-value data in `this` stream
+   * with a continuously updated per-key state. The user-provided state tracking function is
+   * applied on each keyed data item along with its corresponding state. The function can choose to
+   * update/remove the state and return a transformed data, which forms the
+   * [[JavaTrackStateDStream]].
+   *
+   * The specifications of this transformation is made through the
+   * [[org.apache.spark.streaming.StateSpec StateSpec]] class. Besides the tracking function, there
+   * are a number of optional parameters - initial state data, number of partitions, timeouts, etc.
+   * See the [[org.apache.spark.streaming.StateSpec StateSpec]] for more details.
+   *
+   * Example of using `trackStateByKey`:
+   * {{{
+   *   // A tracking function that maintains an integer state and return a String
+   *   Function2<Optional<Integer>, State<Integer>, Optional<String>> trackStateFunc =
+   *       new Function2<Optional<Integer>, State<Integer>, Optional<String>>() {
+   *
+   *         @Override
+   *         public Optional<String> call(Optional<Integer> one, State<Integer> state) {
+   *           // Check if state exists, accordingly update/remove state and return transformed data
+   *         }
+   *       };
+   *
+   *    JavaTrackStateDStream<Integer, Integer, Integer, String> trackStateDStream =
+   *        keyValueDStream.<Integer, String>trackStateByKey(
+   *                 StateSpec.function(trackStateFunc).numPartitions(10));
+   * }}}
+   *
+   * @param spec          Specification of this transformation
+   * @tparam StateType    Class type of the state
+   * @tparam EmittedType  Class type of the tranformed data return by the tracking function
+   */
+  @Experimental
+  def trackStateByKey[StateType, EmittedType](spec: StateSpec[K, V, StateType, EmittedType]):
+    JavaTrackStateDStream[K, V, StateType, EmittedType] = {
+    new JavaTrackStateDStream(dstream.trackStateByKey(spec)(
+      JavaSparkContext.fakeClassTag,
+      JavaSparkContext.fakeClassTag))
+  }
+
   private def convertUpdateStateFunction[S](in: JFunction2[JList[V], Optional[S], Optional[S]]):
   (Seq[V], Option[S]) => Option[S] = {
     val scalaFunc: (Seq[V], Option[S]) => Option[S] = (values, state) => {
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaTrackStateDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaTrackStateDStream.scala
new file mode 100644
index 000000000000..f459930d0660
--- /dev/null
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaTrackStateDStream.scala
@@ -0,0 +1,44 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming.api.java
+
+import org.apache.spark.annotation.Experimental
+import org.apache.spark.api.java.JavaSparkContext
+import org.apache.spark.streaming.dstream.TrackStateDStream
+
+/**
+ * :: Experimental ::
+ * [[JavaDStream]] representing the stream of records emitted by the tracking function in the
+ * `trackStateByKey` operation on a [[JavaPairDStream]]. Additionally, it also gives access to the
+ * stream of state snapshots, that is, the state data of all keys after a batch has updated them.
+ *
+ * @tparam KeyType Class of the state key
+ * @tparam ValueType Class of the state value
+ * @tparam StateType Class of the state
+ * @tparam EmittedType Class of the emitted records
+ */
+@Experimental
+class JavaTrackStateDStream[KeyType, ValueType, StateType, EmittedType](
+    dstream: TrackStateDStream[KeyType, ValueType, StateType, EmittedType])
+  extends JavaDStream[EmittedType](dstream)(JavaSparkContext.fakeClassTag) {
+
+  def stateSnapshots(): JavaPairDStream[KeyType, StateType] =
+    new JavaPairDStream(dstream.stateSnapshots())(
+      JavaSparkContext.fakeClassTag,
+      JavaSparkContext.fakeClassTag)
+}
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
index 58d89c93bcbe..98e881e6ae11 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
@@ -35,6 +35,7 @@ import org.apache.spark.streaming.rdd.{TrackStateRDD, TrackStateRDDRecord}
  * all keys after a batch has updated them.
  *
  * @tparam KeyType Class of the state key
+ * @tparam ValueType Class of the state value
  * @tparam StateType Class of the state data
  * @tparam EmittedType Class of the emitted records
  */
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
index ed7cea26d060..fc51496be47b 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
@@ -70,12 +70,14 @@ private[streaming] class TrackStateRDDPartition(
  *                           in the `prevStateRDD` to create `this` RDD
  * @param trackingFunction The function that will be used to update state and return new data
  * @param batchTime        The time of the batch to which this RDD belongs to. Use to update
+ * @param timeoutThresholdTime The time to indicate which keys are timeout
  */
 private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
     private var prevStateRDD: RDD[TrackStateRDDRecord[K, S, T]],
     private var partitionedDataRDD: RDD[(K, V)],
     trackingFunction: (Time, K, Option[V], State[S]) => Option[T],
-    batchTime: Time, timeoutThresholdTime: Option[Long]
+    batchTime: Time,
+    timeoutThresholdTime: Option[Long]
   ) extends RDD[TrackStateRDDRecord[K, S, T]](
     partitionedDataRDD.sparkContext,
     List(
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
index ed622ef7bf70..34287c3e0090 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
@@ -267,7 +267,11 @@ private[streaming] class OpenHashMapBasedStateMap[K: ClassTag, S: ClassTag](
 
     // Read the data of the delta
     val deltaMapSize = inputStream.readInt()
-    deltaMap = new OpenHashMap[K, StateInfo[S]]()
+    deltaMap = if (deltaMapSize != 0) {
+        new OpenHashMap[K, StateInfo[S]](deltaMapSize)
+      } else {
+        new OpenHashMap[K, StateInfo[S]](initialCapacity)
+      }
     var deltaMapCount = 0
     while (deltaMapCount < deltaMapSize) {
       val key = inputStream.readObject().asInstanceOf[K]
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaTrackStateByKeySuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaTrackStateByKeySuite.java
new file mode 100644
index 000000000000..eac4cdd14a68
--- /dev/null
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaTrackStateByKeySuite.java
@@ -0,0 +1,210 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.streaming;
+
+import java.io.Serializable;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Set;
+
+import scala.Tuple2;
+
+import com.google.common.base.Optional;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.streaming.api.java.JavaDStream;
+import org.apache.spark.util.ManualClock;
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.apache.spark.HashPartitioner;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.function.Function4;
+import org.apache.spark.streaming.api.java.JavaPairDStream;
+import org.apache.spark.streaming.api.java.JavaTrackStateDStream;
+
+public class JavaTrackStateByKeySuite extends LocalJavaStreamingContext implements Serializable {
+
+  /**
+   * This test is only for testing the APIs. It's not necessary to run it.
+   */
+  public void testAPI() {
+    JavaPairRDD<String, Boolean> initialRDD = null;
+    JavaPairDStream<String, Integer> wordsDstream = null;
+
+    final Function4<Time, String, Optional<Integer>, State<Boolean>, Optional<Double>>
+        trackStateFunc =
+        new Function4<Time, String, Optional<Integer>, State<Boolean>, Optional<Double>>() {
+
+          @Override
+          public Optional<Double> call(
+              Time time, String word, Optional<Integer> one, State<Boolean> state) {
+            // Use all State's methods here
+            state.exists();
+            state.get();
+            state.isTimingOut();
+            state.remove();
+            state.update(true);
+            return Optional.of(2.0);
+          }
+        };
+
+    JavaTrackStateDStream<String, Integer, Boolean, Double> stateDstream =
+        wordsDstream.trackStateByKey(
+            StateSpec.function(trackStateFunc)
+                .initialState(initialRDD)
+                .numPartitions(10)
+                .partitioner(new HashPartitioner(10))
+                .timeout(Durations.seconds(10)));
+
+    JavaPairDStream<String, Boolean> emittedRecords = stateDstream.stateSnapshots();
+
+    final Function2<Optional<Integer>, State<Boolean>, Double> trackStateFunc2 =
+        new Function2<Optional<Integer>, State<Boolean>, Double>() {
+
+          @Override
+          public Double call(Optional<Integer> one, State<Boolean> state) {
+            // Use all State's methods here
+            state.exists();
+            state.get();
+            state.isTimingOut();
+            state.remove();
+            state.update(true);
+            return 2.0;
+          }
+        };
+
+    JavaTrackStateDStream<String, Integer, Boolean, Double> stateDstream2 =
+        wordsDstream.trackStateByKey(
+            StateSpec.<String, Integer, Boolean, Double> function(trackStateFunc2)
+                .initialState(initialRDD)
+                .numPartitions(10)
+                .partitioner(new HashPartitioner(10))
+                .timeout(Durations.seconds(10)));
+
+    JavaPairDStream<String, Boolean> emittedRecords2 = stateDstream2.stateSnapshots();
+  }
+
+  @Test
+  public void testBasicFunction() {
+    List<List<String>> inputData = Arrays.asList(
+        Collections.<String>emptyList(),
+        Arrays.asList("a"),
+        Arrays.asList("a", "b"),
+        Arrays.asList("a", "b", "c"),
+        Arrays.asList("a", "b"),
+        Arrays.asList("a"),
+        Collections.<String>emptyList()
+    );
+
+    List<Set<Integer>> outputData = Arrays.asList(
+        Collections.<Integer>emptySet(),
+        Sets.newHashSet(1),
+        Sets.newHashSet(2, 1),
+        Sets.newHashSet(3, 2, 1),
+        Sets.newHashSet(4, 3),
+        Sets.newHashSet(5),
+        Collections.<Integer>emptySet()
+    );
+
+    List<Set<Tuple2<String, Integer>>> stateData = Arrays.asList(
+        Collections.<Tuple2<String, Integer>>emptySet(),
+        Sets.newHashSet(new Tuple2<String, Integer>("a", 1)),
+        Sets.newHashSet(new Tuple2<String, Integer>("a", 2), new Tuple2<String, Integer>("b", 1)),
+        Sets.newHashSet(
+            new Tuple2<String, Integer>("a", 3),
+            new Tuple2<String, Integer>("b", 2),
+            new Tuple2<String, Integer>("c", 1)),
+        Sets.newHashSet(
+            new Tuple2<String, Integer>("a", 4),
+            new Tuple2<String, Integer>("b", 3),
+            new Tuple2<String, Integer>("c", 1)),
+        Sets.newHashSet(
+            new Tuple2<String, Integer>("a", 5),
+            new Tuple2<String, Integer>("b", 3),
+            new Tuple2<String, Integer>("c", 1)),
+        Sets.newHashSet(
+            new Tuple2<String, Integer>("a", 5),
+            new Tuple2<String, Integer>("b", 3),
+            new Tuple2<String, Integer>("c", 1))
+    );
+
+    Function2<Optional<Integer>, State<Integer>, Integer> trackStateFunc =
+        new Function2<Optional<Integer>, State<Integer>, Integer>() {
+
+          @Override
+          public Integer call(Optional<Integer> value, State<Integer> state) throws Exception {
+            int sum = value.or(0) + (state.exists() ? state.get() : 0);
+            state.update(sum);
+            return sum;
+          }
+        };
+    testOperation(
+        inputData,
+        StateSpec.<String, Integer, Integer, Integer>function(trackStateFunc),
+        outputData,
+        stateData);
+  }
+
+  private <K, S, T> void testOperation(
+      List<List<K>> input,
+      StateSpec<K, Integer, S, T> trackStateSpec,
+      List<Set<T>> expectedOutputs,
+      List<Set<Tuple2<K, S>>> expectedStateSnapshots) {
+    int numBatches = expectedOutputs.size();
+    JavaDStream<K> inputStream = JavaTestUtils.attachTestInputStream(ssc, input, 2);
+    JavaTrackStateDStream<K, Integer, S, T> trackeStateStream =
+        JavaPairDStream.fromJavaDStream(inputStream.map(new Function<K, Tuple2<K, Integer>>() {
+          @Override
+          public Tuple2<K, Integer> call(K x) throws Exception {
+            return new Tuple2<K, Integer>(x, 1);
+          }
+        })).trackStateByKey(trackStateSpec);
+
+    final List<Set<T>> collectedOutputs =
+        Collections.synchronizedList(Lists.<Set<T>>newArrayList());
+    trackeStateStream.foreachRDD(new Function<JavaRDD<T>, Void>() {
+      @Override
+      public Void call(JavaRDD<T> rdd) throws Exception {
+        collectedOutputs.add(Sets.newHashSet(rdd.collect()));
+        return null;
+      }
+    });
+    final List<Set<Tuple2<K, S>>> collectedStateSnapshots =
+        Collections.synchronizedList(Lists.<Set<Tuple2<K, S>>>newArrayList());
+    trackeStateStream.stateSnapshots().foreachRDD(new Function<JavaPairRDD<K, S>, Void>() {
+      @Override
+      public Void call(JavaPairRDD<K, S> rdd) throws Exception {
+        collectedStateSnapshots.add(Sets.newHashSet(rdd.collect()));
+        return null;
+      }
+    });
+    BatchCounter batchCounter = new BatchCounter(ssc.ssc());
+    ssc.start();
+    ((ManualClock) ssc.ssc().scheduler().clock())
+        .advance(ssc.ssc().progressListener().batchDuration() * numBatches + 1);
+    batchCounter.waitUntilBatchesCompleted(numBatches, 10000);
+
+    Assert.assertEquals(expectedOutputs, collectedOutputs);
+    Assert.assertEquals(expectedStateSnapshots, collectedStateSnapshots);
+  }
+}

From 7786f9cc0790d27854a1e184f66a9b4df4d040a2 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Thu, 12 Nov 2015 18:03:23 -0800
Subject: [PATCH 662/896] [SPARK-11419][STREAMING] Parallel recovery for
 FileBasedWriteAheadLog + minor recovery tweaks

The support for closing WriteAheadLog files after writes was just merged in. Closing every file after a write is a very expensive operation as it creates many small files on S3. It's not necessary to enable it on HDFS anyway.

However, when you have many small files on S3, recovery takes very long. In addition, files start stacking up pretty quickly, and deletes may not be able to keep up, therefore deletes can also be parallelized.

This PR adds support for the two parallelization steps mentioned above, in addition to a couple more failures I encountered during recovery.

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9373 from brkyvz/par-recovery.
---
 .../streaming/scheduler/JobScheduler.scala    |  6 +-
 .../util/FileBasedWriteAheadLog.scala         | 78 +++++++++++-----
 .../FileBasedWriteAheadLogRandomReader.scala  |  2 +-
 .../util/FileBasedWriteAheadLogReader.scala   | 17 +++-
 .../spark/streaming/util/HdfsUtils.scala      | 24 ++++-
 .../streaming/ReceivedBlockTrackerSuite.scala | 91 ++++++++++++++++++-
 .../streaming/util/WriteAheadLogSuite.scala   | 87 +++++++++++++++++-
 7 files changed, 268 insertions(+), 37 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
index 2480b4ec093e..1ed6fb0aa9d5 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/scheduler/JobScheduler.scala
@@ -88,8 +88,10 @@ class JobScheduler(val ssc: StreamingContext) extends Logging {
     if (eventLoop == null) return // scheduler has already been stopped
     logDebug("Stopping JobScheduler")
 
-    // First, stop receiving
-    receiverTracker.stop(processAllReceivedData)
+    if (receiverTracker != null) {
+      // First, stop receiving
+      receiverTracker.stop(processAllReceivedData)
+    }
 
     // Second, stop generating jobs. If it has to process all received data,
     // then this will wait for all the processing through JobScheduler to be over.
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
index bc3f2486c21f..72705f1a9c01 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
@@ -17,10 +17,12 @@
 package org.apache.spark.streaming.util
 
 import java.nio.ByteBuffer
+import java.util.concurrent.ThreadPoolExecutor
 import java.util.{Iterator => JIterator}
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
+import scala.collection.parallel.ThreadPoolTaskSupport
 import scala.concurrent.{Await, ExecutionContext, Future}
 import scala.language.postfixOps
 
@@ -57,8 +59,8 @@ private[streaming] class FileBasedWriteAheadLog(
   private val callerNameTag = getCallerName.map(c => s" for $c").getOrElse("")
 
   private val threadpoolName = s"WriteAheadLogManager $callerNameTag"
-  implicit private val executionContext = ExecutionContext.fromExecutorService(
-    ThreadUtils.newDaemonSingleThreadExecutor(threadpoolName))
+  private val threadpool = ThreadUtils.newDaemonCachedThreadPool(threadpoolName, 20)
+  private val executionContext = ExecutionContext.fromExecutorService(threadpool)
   override protected val logName = s"WriteAheadLogManager $callerNameTag"
 
   private var currentLogPath: Option[String] = None
@@ -124,13 +126,19 @@ private[streaming] class FileBasedWriteAheadLog(
    */
   def readAll(): JIterator[ByteBuffer] = synchronized {
     val logFilesToRead = pastLogs.map{ _.path} ++ currentLogPath
-    logInfo("Reading from the logs: " + logFilesToRead.mkString("\n"))
-
-    logFilesToRead.iterator.map { file =>
+    logInfo("Reading from the logs:\n" + logFilesToRead.mkString("\n"))
+    def readFile(file: String): Iterator[ByteBuffer] = {
       logDebug(s"Creating log reader with $file")
       val reader = new FileBasedWriteAheadLogReader(file, hadoopConf)
       CompletionIterator[ByteBuffer, Iterator[ByteBuffer]](reader, reader.close _)
-    }.flatten.asJava
+    }
+    if (!closeFileAfterWrite) {
+      logFilesToRead.iterator.map(readFile).flatten.asJava
+    } else {
+      // For performance gains, it makes sense to parallelize the recovery if
+      // closeFileAfterWrite = true
+      seqToParIterator(threadpool, logFilesToRead, readFile).asJava
+    }
   }
 
   /**
@@ -146,30 +154,33 @@ private[streaming] class FileBasedWriteAheadLog(
    * asynchronously.
    */
   def clean(threshTime: Long, waitForCompletion: Boolean): Unit = {
-    val oldLogFiles = synchronized { pastLogs.filter { _.endTime < threshTime } }
+    val oldLogFiles = synchronized {
+      val expiredLogs = pastLogs.filter { _.endTime < threshTime }
+      pastLogs --= expiredLogs
+      expiredLogs
+    }
     logInfo(s"Attempting to clear ${oldLogFiles.size} old log files in $logDirectory " +
       s"older than $threshTime: ${oldLogFiles.map { _.path }.mkString("\n")}")
 
-    def deleteFiles() {
-      oldLogFiles.foreach { logInfo =>
-        try {
-          val path = new Path(logInfo.path)
-          val fs = HdfsUtils.getFileSystemForPath(path, hadoopConf)
-          fs.delete(path, true)
-          synchronized { pastLogs -= logInfo }
-          logDebug(s"Cleared log file $logInfo")
-        } catch {
-          case ex: Exception =>
-            logWarning(s"Error clearing write ahead log file $logInfo", ex)
-        }
+    def deleteFile(walInfo: LogInfo): Unit = {
+      try {
+        val path = new Path(walInfo.path)
+        val fs = HdfsUtils.getFileSystemForPath(path, hadoopConf)
+        fs.delete(path, true)
+        logDebug(s"Cleared log file $walInfo")
+      } catch {
+        case ex: Exception =>
+          logWarning(s"Error clearing write ahead log file $walInfo", ex)
       }
       logInfo(s"Cleared log files in $logDirectory older than $threshTime")
     }
-    if (!executionContext.isShutdown) {
-      val f = Future { deleteFiles() }
-      if (waitForCompletion) {
-        import scala.concurrent.duration._
-        Await.ready(f, 1 second)
+    oldLogFiles.foreach { logInfo =>
+      if (!executionContext.isShutdown) {
+        val f = Future { deleteFile(logInfo) }(executionContext)
+        if (waitForCompletion) {
+          import scala.concurrent.duration._
+          Await.ready(f, 1 second)
+        }
       }
     }
   }
@@ -251,4 +262,23 @@ private[streaming] object FileBasedWriteAheadLog {
       }
     }.sortBy { _.startTime }
   }
+
+  /**
+   * This creates an iterator from a parallel collection, by keeping at most `n` objects in memory
+   * at any given time, where `n` is the size of the thread pool. This is crucial for use cases
+   * where we create `FileBasedWriteAheadLogReader`s during parallel recovery. We don't want to
+   * open up `k` streams altogether where `k` is the size of the Seq that we want to parallelize.
+   */
+  def seqToParIterator[I, O](
+      tpool: ThreadPoolExecutor,
+      source: Seq[I],
+      handler: I => Iterator[O]): Iterator[O] = {
+    val taskSupport = new ThreadPoolTaskSupport(tpool)
+    val groupSize = tpool.getMaximumPoolSize.max(8)
+    source.grouped(groupSize).flatMap { group =>
+      val parallelCollection = group.par
+      parallelCollection.tasksupport = taskSupport
+      parallelCollection.map(handler)
+    }.flatten
+  }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogRandomReader.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogRandomReader.scala
index f7168229ec15..56d4977da0b5 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogRandomReader.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogRandomReader.scala
@@ -30,7 +30,7 @@ private[streaming] class FileBasedWriteAheadLogRandomReader(path: String, conf:
   extends Closeable {
 
   private val instream = HdfsUtils.getInputStream(path, conf)
-  private var closed = false
+  private var closed = (instream == null) // the file may be deleted as we're opening the stream
 
   def read(segment: FileBasedWriteAheadLogSegment): ByteBuffer = synchronized {
     assertOpen()
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogReader.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogReader.scala
index c3bb59f3fef9..a375c0729534 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogReader.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLogReader.scala
@@ -16,7 +16,7 @@
  */
 package org.apache.spark.streaming.util
 
-import java.io.{Closeable, EOFException}
+import java.io.{IOException, Closeable, EOFException}
 import java.nio.ByteBuffer
 
 import org.apache.hadoop.conf.Configuration
@@ -32,7 +32,7 @@ private[streaming] class FileBasedWriteAheadLogReader(path: String, conf: Config
   extends Iterator[ByteBuffer] with Closeable with Logging {
 
   private val instream = HdfsUtils.getInputStream(path, conf)
-  private var closed = false
+  private var closed = (instream == null) // the file may be deleted as we're opening the stream
   private var nextItem: Option[ByteBuffer] = None
 
   override def hasNext: Boolean = synchronized {
@@ -55,6 +55,19 @@ private[streaming] class FileBasedWriteAheadLogReader(path: String, conf: Config
           logDebug("Error reading next item, EOF reached", e)
           close()
           false
+        case e: IOException =>
+          logWarning("Error while trying to read data. If the file was deleted, " +
+            "this should be okay.", e)
+          close()
+          if (HdfsUtils.checkFileExists(path, conf)) {
+            // If file exists, this could be a legitimate error
+            throw e
+          } else {
+            // File was deleted. This can occur when the daemon cleanup thread takes time to
+            // delete the file during recovery.
+            false
+          }
+
         case e: Exception =>
           logWarning("Error while trying to read data from HDFS.", e)
           close()
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/HdfsUtils.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/HdfsUtils.scala
index f60688f173c4..13a765d035ee 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/HdfsUtils.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/HdfsUtils.scala
@@ -16,6 +16,8 @@
  */
 package org.apache.spark.streaming.util
 
+import java.io.IOException
+
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs._
 
@@ -42,8 +44,19 @@ private[streaming] object HdfsUtils {
   def getInputStream(path: String, conf: Configuration): FSDataInputStream = {
     val dfsPath = new Path(path)
     val dfs = getFileSystemForPath(dfsPath, conf)
-    val instream = dfs.open(dfsPath)
-    instream
+    if (dfs.isFile(dfsPath)) {
+      try {
+        dfs.open(dfsPath)
+      } catch {
+        case e: IOException =>
+          // If we are really unlucky, the file may be deleted as we're opening the stream.
+          // This can happen as clean up is performed by daemon threads that may be left over from
+          // previous runs.
+          if (!dfs.isFile(dfsPath)) null else throw e
+      }
+    } else {
+      null
+    }
   }
 
   def checkState(state: Boolean, errorMsg: => String) {
@@ -71,4 +84,11 @@ private[streaming] object HdfsUtils {
       case _ => fs
     }
   }
+
+  /** Check if the file exists at the given path. */
+  def checkFileExists(path: String, conf: Configuration): Boolean = {
+    val hdpPath = new Path(path)
+    val fs = getFileSystemForPath(hdpPath, conf)
+    fs.isFile(hdpPath)
+  }
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
index f793a12843b2..7db17abb7947 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.streaming
 
 import java.io.File
+import java.nio.ByteBuffer
 
 import scala.collection.mutable.ArrayBuffer
 import scala.concurrent.duration._
@@ -32,7 +33,7 @@ import org.apache.spark.{Logging, SparkConf, SparkException, SparkFunSuite}
 import org.apache.spark.storage.StreamBlockId
 import org.apache.spark.streaming.receiver.BlockManagerBasedStoreResult
 import org.apache.spark.streaming.scheduler._
-import org.apache.spark.streaming.util.{WriteAheadLogUtils, FileBasedWriteAheadLogReader}
+import org.apache.spark.streaming.util._
 import org.apache.spark.streaming.util.WriteAheadLogSuite._
 import org.apache.spark.util.{Clock, ManualClock, SystemClock, Utils}
 
@@ -207,6 +208,75 @@ class ReceivedBlockTrackerSuite
     tracker1.isWriteAheadLogEnabled should be (false)
   }
 
+  test("parallel file deletion in FileBasedWriteAheadLog is robust to deletion error") {
+    conf.set("spark.streaming.driver.writeAheadLog.rollingIntervalSecs", "1")
+    require(WriteAheadLogUtils.getRollingIntervalSecs(conf, isDriver = true) === 1)
+
+    val addBlocks = generateBlockInfos()
+    val batch1 = addBlocks.slice(0, 1)
+    val batch2 = addBlocks.slice(1, 3)
+    val batch3 = addBlocks.slice(3, addBlocks.length)
+
+    assert(getWriteAheadLogFiles().length === 0)
+
+    // list of timestamps for files
+    val t = Seq.tabulate(5)(i => i * 1000)
+
+    writeEventsManually(getLogFileName(t(0)), Seq(createBatchCleanup(t(0))))
+    assert(getWriteAheadLogFiles().length === 1)
+
+    // The goal is to create several log files which should have been cleaned up.
+    // If we face any issue during recovery, because these old files exist, then we need to make
+    // deletion more robust rather than a parallelized operation where we fire and forget
+    val batch1Allocation = createBatchAllocation(t(1), batch1)
+    writeEventsManually(getLogFileName(t(1)), batch1.map(BlockAdditionEvent) :+ batch1Allocation)
+
+    writeEventsManually(getLogFileName(t(2)), Seq(createBatchCleanup(t(1))))
+
+    val batch2Allocation = createBatchAllocation(t(3), batch2)
+    writeEventsManually(getLogFileName(t(3)), batch2.map(BlockAdditionEvent) :+ batch2Allocation)
+
+    writeEventsManually(getLogFileName(t(4)), batch3.map(BlockAdditionEvent))
+
+    // We should have 5 different log files as we called `writeEventsManually` with 5 different
+    // timestamps
+    assert(getWriteAheadLogFiles().length === 5)
+
+    // Create the tracker to recover from the log files. We're going to ask the tracker to clean
+    // things up, and then we're going to rewrite that data, and recover using a different tracker.
+    // They should have identical data no matter what
+    val tracker = createTracker(recoverFromWriteAheadLog = true, clock = new ManualClock(t(4)))
+
+    def compareTrackers(base: ReceivedBlockTracker, subject: ReceivedBlockTracker): Unit = {
+      subject.getBlocksOfBatchAndStream(t(3), streamId) should be(
+        base.getBlocksOfBatchAndStream(t(3), streamId))
+      subject.getBlocksOfBatchAndStream(t(1), streamId) should be(
+        base.getBlocksOfBatchAndStream(t(1), streamId))
+      subject.getBlocksOfBatchAndStream(t(0), streamId) should be(Nil)
+    }
+
+    // ask the tracker to clean up some old files
+    tracker.cleanupOldBatches(t(3), waitForCompletion = true)
+    assert(getWriteAheadLogFiles().length === 3)
+
+    val tracker2 = createTracker(recoverFromWriteAheadLog = true, clock = new ManualClock(t(4)))
+    compareTrackers(tracker, tracker2)
+
+    // rewrite first file
+    writeEventsManually(getLogFileName(t(0)), Seq(createBatchCleanup(t(0))))
+    assert(getWriteAheadLogFiles().length === 4)
+    // make sure trackers are consistent
+    val tracker3 = createTracker(recoverFromWriteAheadLog = true, clock = new ManualClock(t(4)))
+    compareTrackers(tracker, tracker3)
+
+    // rewrite second file
+    writeEventsManually(getLogFileName(t(1)), batch1.map(BlockAdditionEvent) :+ batch1Allocation)
+    assert(getWriteAheadLogFiles().length === 5)
+    // make sure trackers are consistent
+    val tracker4 = createTracker(recoverFromWriteAheadLog = true, clock = new ManualClock(t(4)))
+    compareTrackers(tracker, tracker4)
+  }
+
   /**
    * Create tracker object with the optional provided clock. Use fake clock if you
    * want to control time by manually incrementing it to test log clean.
@@ -228,11 +298,30 @@ class ReceivedBlockTrackerSuite
       BlockManagerBasedStoreResult(StreamBlockId(streamId, math.abs(Random.nextInt)), Some(0L))))
   }
 
+  /**
+   * Write received block tracker events to a file manually.
+   */
+  def writeEventsManually(filePath: String, events: Seq[ReceivedBlockTrackerLogEvent]): Unit = {
+    val writer = HdfsUtils.getOutputStream(filePath, hadoopConf)
+    events.foreach { event =>
+      val bytes = Utils.serialize(event)
+      writer.writeInt(bytes.size)
+      writer.write(bytes)
+    }
+    writer.close()
+  }
+
   /** Get all the data written in the given write ahead log file. */
   def getWrittenLogData(logFile: String): Seq[ReceivedBlockTrackerLogEvent] = {
     getWrittenLogData(Seq(logFile))
   }
 
+  /** Get the log file name for the given log start time. */
+  def getLogFileName(time: Long, rollingIntervalSecs: Int = 1): String = {
+    checkpointDirectory.toString + File.separator + "receivedBlockMetadata" +
+      File.separator + s"log-$time-${time + rollingIntervalSecs * 1000}"
+  }
+
   /**
    * Get all the data written in the given write ahead log files. By default, it will read all
    * files in the test log directory.
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index 9e13f25c2efe..4273fd7dda8b 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -19,7 +19,8 @@ package org.apache.spark.streaming.util
 import java.io._
 import java.nio.ByteBuffer
 import java.util.{Iterator => JIterator}
-import java.util.concurrent.ThreadPoolExecutor
+import java.util.concurrent.atomic.AtomicInteger
+import java.util.concurrent.{TimeUnit, CountDownLatch, ThreadPoolExecutor}
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
@@ -32,15 +33,13 @@ import org.apache.hadoop.fs.Path
 import org.mockito.Matchers.{eq => meq}
 import org.mockito.Matchers._
 import org.mockito.Mockito._
-import org.mockito.invocation.InvocationOnMock
-import org.mockito.stubbing.Answer
 import org.scalatest.concurrent.Eventually
 import org.scalatest.concurrent.Eventually._
 import org.scalatest.{PrivateMethodTester, BeforeAndAfterEach, BeforeAndAfter}
 import org.scalatest.mock.MockitoSugar
 
 import org.apache.spark.streaming.scheduler._
-import org.apache.spark.util.{ThreadUtils, ManualClock, Utils}
+import org.apache.spark.util.{CompletionIterator, ThreadUtils, ManualClock, Utils}
 import org.apache.spark.{SparkConf, SparkFunSuite}
 
 /** Common tests for WriteAheadLogs that we would like to test with different configurations. */
@@ -198,6 +197,64 @@ class FileBasedWriteAheadLogSuite
 
   import WriteAheadLogSuite._
 
+  test("FileBasedWriteAheadLog - seqToParIterator") {
+    /*
+     If the setting `closeFileAfterWrite` is enabled, we start generating a very large number of
+     files. This causes recovery to take a very long time. In order to make it quicker, we
+     parallelized the reading of these files. This test makes sure that we limit the number of
+     open files to the size of the number of threads in our thread pool rather than the size of
+     the list of files.
+     */
+    val numThreads = 8
+    val tpool = ThreadUtils.newDaemonFixedThreadPool(numThreads, "wal-test-thread-pool")
+    class GetMaxCounter {
+      private val value = new AtomicInteger()
+      @volatile private var max: Int = 0
+      def increment(): Unit = synchronized {
+        val atInstant = value.incrementAndGet()
+        if (atInstant > max) max = atInstant
+      }
+      def decrement(): Unit = synchronized { value.decrementAndGet() }
+      def get(): Int = synchronized { value.get() }
+      def getMax(): Int = synchronized { max }
+    }
+    try {
+      // If Jenkins is slow, we may not have a chance to run many threads simultaneously. Having
+      // a latch will make sure that all the threads can be launched altogether.
+      val latch = new CountDownLatch(1)
+      val testSeq = 1 to 1000
+      val counter = new GetMaxCounter()
+      def handle(value: Int): Iterator[Int] = {
+        new CompletionIterator[Int, Iterator[Int]](Iterator(value)) {
+          counter.increment()
+          // block so that other threads also launch
+          latch.await(10, TimeUnit.SECONDS)
+          override def completion() { counter.decrement() }
+        }
+      }
+      @volatile var collected: Seq[Int] = Nil
+      val t = new Thread() {
+        override def run() {
+          // run the calculation on a separate thread so that we can release the latch
+          val iterator = FileBasedWriteAheadLog.seqToParIterator[Int, Int](tpool, testSeq, handle)
+          collected = iterator.toSeq
+        }
+      }
+      t.start()
+      eventually(Eventually.timeout(10.seconds)) {
+        // make sure we are doing a parallel computation!
+        assert(counter.getMax() > 1)
+      }
+      latch.countDown()
+      t.join(10000)
+      assert(collected === testSeq)
+      // make sure we didn't open too many Iterators
+      assert(counter.getMax() <= numThreads)
+    } finally {
+      tpool.shutdownNow()
+    }
+  }
+
   test("FileBasedWriteAheadLogWriter - writing data") {
     val dataToWrite = generateRandomData()
     val segments = writeDataUsingWriter(testFile, dataToWrite)
@@ -259,6 +316,26 @@ class FileBasedWriteAheadLogSuite
     assert(readDataUsingReader(testFile) === (dataToWrite.dropRight(1)))
   }
 
+  test("FileBasedWriteAheadLogReader - handles errors when file doesn't exist") {
+    // Write data manually for testing the sequential reader
+    val dataToWrite = generateRandomData()
+    writeDataUsingWriter(testFile, dataToWrite)
+    val tFile = new File(testFile)
+    assert(tFile.exists())
+    // Verify the data can be read and is same as the one correctly written
+    assert(readDataUsingReader(testFile) === dataToWrite)
+
+    tFile.delete()
+    assert(!tFile.exists())
+
+    val reader = new FileBasedWriteAheadLogReader(testFile, hadoopConf)
+    assert(!reader.hasNext)
+    reader.close()
+
+    // Verify that no exception is thrown if file doesn't exist
+    assert(readDataUsingReader(testFile) === Nil)
+  }
+
   test("FileBasedWriteAheadLogRandomReader - reading data using random reader") {
     // Write data manually for testing the random reader
     val writtenData = generateRandomData()
@@ -581,7 +658,7 @@ object WriteAheadLogSuite {
       closeFileAfterWrite: Boolean,
       allowBatching: Boolean): Seq[String] = {
     val wal = createWriteAheadLog(logDirectory, closeFileAfterWrite, allowBatching)
-    val data = wal.readAll().asScala.map(byteBufferToString).toSeq
+    val data = wal.readAll().asScala.map(byteBufferToString).toArray
     wal.close()
     data
   }

From e4e46b20f6475f8e148d5326f7c88c57850d46a1 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Thu, 12 Nov 2015 19:02:49 -0800
Subject: [PATCH 663/896] [SPARK-11681][STREAMING] Correctly update state
 timestamp even when state is not updated

Bug: Timestamp is not updated if there is data but the corresponding state is not updated. This is wrong, and timeout is defined as "no data for a while", not "not state update for a while".

Fix: Update timestamp when timestamp when timeout is specified, otherwise no need.
Also refactored the code for better testability and added unit tests.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9648 from tdas/SPARK-11681.
---
 .../spark/streaming/rdd/TrackStateRDD.scala   | 105 ++++++++------
 .../streaming/rdd/TrackStateRDDSuite.scala    | 136 +++++++++++++++++-
 2 files changed, 192 insertions(+), 49 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
index fc51496be47b..7050378d0feb 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/rdd/TrackStateRDD.scala
@@ -32,8 +32,51 @@ import org.apache.spark._
  * Record storing the keyed-state [[TrackStateRDD]]. Each record contains a [[StateMap]] and a
  * sequence of records returned by the tracking function of `trackStateByKey`.
  */
-private[streaming] case class TrackStateRDDRecord[K, S, T](
-    var stateMap: StateMap[K, S], var emittedRecords: Seq[T])
+private[streaming] case class TrackStateRDDRecord[K, S, E](
+    var stateMap: StateMap[K, S], var emittedRecords: Seq[E])
+
+private[streaming] object TrackStateRDDRecord {
+  def updateRecordWithData[K: ClassTag, V: ClassTag, S: ClassTag, E: ClassTag](
+    prevRecord: Option[TrackStateRDDRecord[K, S, E]],
+    dataIterator: Iterator[(K, V)],
+    updateFunction: (Time, K, Option[V], State[S]) => Option[E],
+    batchTime: Time,
+    timeoutThresholdTime: Option[Long],
+    removeTimedoutData: Boolean
+  ): TrackStateRDDRecord[K, S, E] = {
+    // Create a new state map by cloning the previous one (if it exists) or by creating an empty one
+    val newStateMap = prevRecord.map { _.stateMap.copy() }. getOrElse { new EmptyStateMap[K, S]() }
+
+    val emittedRecords = new ArrayBuffer[E]
+    val wrappedState = new StateImpl[S]()
+
+    // Call the tracking function on each record in the data iterator, and accordingly
+    // update the states touched, and collect the data returned by the tracking function
+    dataIterator.foreach { case (key, value) =>
+      wrappedState.wrap(newStateMap.get(key))
+      val emittedRecord = updateFunction(batchTime, key, Some(value), wrappedState)
+      if (wrappedState.isRemoved) {
+        newStateMap.remove(key)
+      } else if (wrappedState.isUpdated || timeoutThresholdTime.isDefined) {
+        newStateMap.put(key, wrappedState.get(), batchTime.milliseconds)
+      }
+      emittedRecords ++= emittedRecord
+    }
+
+    // Get the timed out state records, call the tracking function on each and collect the
+    // data returned
+    if (removeTimedoutData && timeoutThresholdTime.isDefined) {
+      newStateMap.getByTime(timeoutThresholdTime.get).foreach { case (key, state, _) =>
+        wrappedState.wrapTiminoutState(state)
+        val emittedRecord = updateFunction(batchTime, key, None, wrappedState)
+        emittedRecords ++= emittedRecord
+        newStateMap.remove(key)
+      }
+    }
+
+    TrackStateRDDRecord(newStateMap, emittedRecords)
+  }
+}
 
 /**
  * Partition of the [[TrackStateRDD]], which depends on corresponding partitions of prev state
@@ -72,16 +115,16 @@ private[streaming] class TrackStateRDDPartition(
  * @param batchTime        The time of the batch to which this RDD belongs to. Use to update
  * @param timeoutThresholdTime The time to indicate which keys are timeout
  */
-private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
-    private var prevStateRDD: RDD[TrackStateRDDRecord[K, S, T]],
+private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, E: ClassTag](
+    private var prevStateRDD: RDD[TrackStateRDDRecord[K, S, E]],
     private var partitionedDataRDD: RDD[(K, V)],
-    trackingFunction: (Time, K, Option[V], State[S]) => Option[T],
+    trackingFunction: (Time, K, Option[V], State[S]) => Option[E],
     batchTime: Time,
     timeoutThresholdTime: Option[Long]
-  ) extends RDD[TrackStateRDDRecord[K, S, T]](
+  ) extends RDD[TrackStateRDDRecord[K, S, E]](
     partitionedDataRDD.sparkContext,
     List(
-      new OneToOneDependency[TrackStateRDDRecord[K, S, T]](prevStateRDD),
+      new OneToOneDependency[TrackStateRDDRecord[K, S, E]](prevStateRDD),
       new OneToOneDependency(partitionedDataRDD))
   ) {
 
@@ -98,7 +141,7 @@ private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, T:
   }
 
   override def compute(
-      partition: Partition, context: TaskContext): Iterator[TrackStateRDDRecord[K, S, T]] = {
+      partition: Partition, context: TaskContext): Iterator[TrackStateRDDRecord[K, S, E]] = {
 
     val stateRDDPartition = partition.asInstanceOf[TrackStateRDDPartition]
     val prevStateRDDIterator = prevStateRDD.iterator(
@@ -106,42 +149,16 @@ private[streaming] class TrackStateRDD[K: ClassTag, V: ClassTag, S: ClassTag, T:
     val dataIterator = partitionedDataRDD.iterator(
       stateRDDPartition.partitionedDataRDDPartition, context)
 
-    // Create a new state map by cloning the previous one (if it exists) or by creating an empty one
-    val newStateMap = if (prevStateRDDIterator.hasNext) {
-      prevStateRDDIterator.next().stateMap.copy()
-    } else {
-      new EmptyStateMap[K, S]()
-    }
-
-    val emittedRecords = new ArrayBuffer[T]
-    val wrappedState = new StateImpl[S]()
-
-    // Call the tracking function on each record in the data RDD partition, and accordingly
-    // update the states touched, and the data returned by the tracking function.
-    dataIterator.foreach { case (key, value) =>
-      wrappedState.wrap(newStateMap.get(key))
-      val emittedRecord = trackingFunction(batchTime, key, Some(value), wrappedState)
-      if (wrappedState.isRemoved) {
-        newStateMap.remove(key)
-      } else if (wrappedState.isUpdated) {
-        newStateMap.put(key, wrappedState.get(), batchTime.milliseconds)
-      }
-      emittedRecords ++= emittedRecord
-    }
-
-    // If the RDD is expected to be doing a full scan of all the data in the StateMap,
-    // then use this opportunity to filter out those keys that have timed out.
-    // For each of them call the tracking function.
-    if (doFullScan && timeoutThresholdTime.isDefined) {
-      newStateMap.getByTime(timeoutThresholdTime.get).foreach { case (key, state, _) =>
-        wrappedState.wrapTiminoutState(state)
-        val emittedRecord = trackingFunction(batchTime, key, None, wrappedState)
-        emittedRecords ++= emittedRecord
-        newStateMap.remove(key)
-      }
-    }
-
-    Iterator(TrackStateRDDRecord(newStateMap, emittedRecords))
+    val prevRecord = if (prevStateRDDIterator.hasNext) Some(prevStateRDDIterator.next()) else None
+    val newRecord = TrackStateRDDRecord.updateRecordWithData(
+      prevRecord,
+      dataIterator,
+      trackingFunction,
+      batchTime,
+      timeoutThresholdTime,
+      removeTimedoutData = doFullScan // remove timedout data only when full scan is enabled
+    )
+    Iterator(newRecord)
   }
 
   override protected def getPartitions: Array[Partition] = {
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
index f396b76e8d25..19ef5a14f8ab 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
@@ -23,6 +23,7 @@ import scala.reflect.ClassTag
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.rdd.RDD
+import org.apache.spark.streaming.util.OpenHashMapBasedStateMap
 import org.apache.spark.streaming.{Time, State}
 import org.apache.spark.{HashPartitioner, SparkConf, SparkContext, SparkFunSuite}
 
@@ -52,6 +53,131 @@ class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
     assert(rdd.partitioner === Some(partitioner))
   }
 
+  test("updating state and generating emitted data in TrackStateRecord") {
+
+    val initialTime = 1000L
+    val updatedTime = 2000L
+    val thresholdTime = 1500L
+    @volatile var functionCalled = false
+
+    /**
+     * Assert that applying given data on a prior record generates correct updated record, with
+     * correct state map and emitted data
+     */
+    def assertRecordUpdate(
+        initStates: Iterable[Int],
+        data: Iterable[String],
+        expectedStates: Iterable[(Int, Long)],
+        timeoutThreshold: Option[Long] = None,
+        removeTimedoutData: Boolean = false,
+        expectedOutput: Iterable[Int] = None,
+        expectedTimingOutStates: Iterable[Int] = None,
+        expectedRemovedStates: Iterable[Int] = None
+      ): Unit = {
+      val initialStateMap = new OpenHashMapBasedStateMap[String, Int]()
+      initStates.foreach { s => initialStateMap.put("key", s, initialTime) }
+      functionCalled = false
+      val record = TrackStateRDDRecord[String, Int, Int](initialStateMap, Seq.empty)
+      val dataIterator = data.map { v => ("key", v) }.iterator
+      val removedStates = new ArrayBuffer[Int]
+      val timingOutStates = new ArrayBuffer[Int]
+      /**
+       * Tracking function that updates/removes state based on instructions in the data, and
+       * return state (when instructed or when state is timing out).
+       */
+      def testFunc(t: Time, key: String, data: Option[String], state: State[Int]): Option[Int] = {
+        functionCalled = true
+
+        assert(t.milliseconds === updatedTime, "tracking func called with wrong time")
+
+        data match {
+          case Some("noop") =>
+            None
+          case Some("get-state") =>
+            Some(state.getOption().getOrElse(-1))
+          case Some("update-state") =>
+            if (state.exists) state.update(state.get + 1) else state.update(0)
+            None
+          case Some("remove-state") =>
+            removedStates += state.get()
+            state.remove()
+            None
+          case None =>
+            assert(state.isTimingOut() === true, "State is not timing out when data = None")
+            timingOutStates += state.get()
+            None
+          case _ =>
+            fail("Unexpected test data")
+        }
+      }
+
+      val updatedRecord = TrackStateRDDRecord.updateRecordWithData[String, String, Int, Int](
+        Some(record), dataIterator, testFunc,
+        Time(updatedTime), timeoutThreshold, removeTimedoutData)
+
+      val updatedStateData = updatedRecord.stateMap.getAll().map { x => (x._2, x._3) }
+      assert(updatedStateData.toSet === expectedStates.toSet,
+        "states do not match after updating the TrackStateRecord")
+
+      assert(updatedRecord.emittedRecords.toSet === expectedOutput.toSet,
+        "emitted data do not match after updating the TrackStateRecord")
+
+      assert(timingOutStates.toSet === expectedTimingOutStates.toSet, "timing out states do not " +
+        "match those that were expected to do so while updating the TrackStateRecord")
+
+      assert(removedStates.toSet === expectedRemovedStates.toSet, "removed states do not " +
+        "match those that were expected to do so while updating the TrackStateRecord")
+
+    }
+
+    // No data, no state should be changed, function should not be called,
+    assertRecordUpdate(initStates = Nil, data = None, expectedStates = Nil)
+    assert(functionCalled === false)
+    assertRecordUpdate(initStates = Seq(0), data = None, expectedStates = Seq((0, initialTime)))
+    assert(functionCalled === false)
+
+    // Data present, function should be called irrespective of whether state exists
+    assertRecordUpdate(initStates = Seq(0), data = Seq("noop"),
+      expectedStates = Seq((0, initialTime)))
+    assert(functionCalled === true)
+    assertRecordUpdate(initStates = None, data = Some("noop"), expectedStates = None)
+    assert(functionCalled === true)
+
+    // Function called with right state data
+    assertRecordUpdate(initStates = None, data = Seq("get-state"),
+      expectedStates = None, expectedOutput = Seq(-1))
+    assertRecordUpdate(initStates = Seq(123), data = Seq("get-state"),
+      expectedStates = Seq((123, initialTime)), expectedOutput = Seq(123))
+
+    // Update state and timestamp, when timeout not present
+    assertRecordUpdate(initStates = Nil, data = Seq("update-state"),
+      expectedStates = Seq((0, updatedTime)))
+    assertRecordUpdate(initStates = Seq(0), data = Seq("update-state"),
+      expectedStates = Seq((1, updatedTime)))
+
+    // Remove state
+    assertRecordUpdate(initStates = Seq(345), data = Seq("remove-state"),
+      expectedStates = Nil, expectedRemovedStates = Seq(345))
+
+    // State strictly older than timeout threshold should be timed out
+    assertRecordUpdate(initStates = Seq(123), data = Nil,
+      timeoutThreshold = Some(initialTime), removeTimedoutData = true,
+      expectedStates = Seq((123, initialTime)), expectedTimingOutStates = Nil)
+
+    assertRecordUpdate(initStates = Seq(123), data = Nil,
+      timeoutThreshold = Some(initialTime + 1), removeTimedoutData = true,
+      expectedStates = Nil, expectedTimingOutStates = Seq(123))
+
+    // State should not be timed out after it has received data
+    assertRecordUpdate(initStates = Seq(123), data = Seq("noop"),
+      timeoutThreshold = Some(initialTime + 1), removeTimedoutData = true,
+      expectedStates = Seq((123, updatedTime)), expectedTimingOutStates = Nil)
+    assertRecordUpdate(initStates = Seq(123), data = Seq("remove-state"),
+      timeoutThreshold = Some(initialTime + 1), removeTimedoutData = true,
+      expectedStates = Nil, expectedTimingOutStates = Nil, expectedRemovedStates = Seq(123))
+
+  }
+
   test("states generated by TrackStateRDD") {
     val initStates = Seq(("k1", 0), ("k2", 0))
     val initTime = 123
@@ -148,9 +274,8 @@ class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
     val rdd7 = testStateUpdates(                      // should remove k2's state
       rdd6, Seq(("k2", 2), ("k0", 2), ("k3", 1)), Set(("k3", 0, updateTime)))
 
-    val rdd8 = testStateUpdates(
-      rdd7, Seq(("k3", 2)), Set()                     //
-    )
+    val rdd8 = testStateUpdates(                      // should remove k3's state
+      rdd7, Seq(("k3", 2)), Set())
   }
 
   /** Assert whether the `trackStateByKey` operation generates expected results */
@@ -176,7 +301,7 @@ class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
 
     // Persist to make sure that it gets computed only once and we can track precisely how many
     // state keys the computing touched
-    newStateRDD.persist()
+    newStateRDD.persist().count()
     assertRDD(newStateRDD, expectedStates, expectedEmittedRecords)
     newStateRDD
   }
@@ -188,7 +313,8 @@ class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
       expectedEmittedRecords: Set[T]): Unit = {
     val states = trackStateRDD.flatMap { _.stateMap.getAll() }.collect().toSet
     val emittedRecords = trackStateRDD.flatMap { _.emittedRecords }.collect().toSet
-    assert(states === expectedStates, "states after track state operation were not as expected")
+    assert(states === expectedStates,
+      "states after track state operation were not as expected")
     assert(emittedRecords === expectedEmittedRecords,
       "emitted records after track state operation were not as expected")
   }

From e71c07557c39e2f74bd20d2ab3a2fca88aa5dfbb Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Thu, 12 Nov 2015 20:01:13 -0800
Subject: [PATCH 664/896] [SPARK-11672][ML] flaky spark.ml read/write tests

We set `sqlContext = null` in `afterAll`. However, this doesn't change `SQLContext.activeContext`  and then `SQLContext.getOrCreate` might use the `SparkContext` from previous test suite and hence causes the error. This PR calls `clearActive` in `beforeAll` and `afterAll` to avoid using an old context from other test suites.

cc: yhuai

Author: Xiangrui Meng <meng@databricks.com>

Closes #9677 from mengxr/SPARK-11672.2.
---
 .../org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java   | 4 ++--
 .../spark/ml/classification/LogisticRegressionSuite.scala     | 2 +-
 .../scala/org/apache/spark/ml/feature/BinarizerSuite.scala    | 2 +-
 .../scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala | 2 +-
 .../org/apache/spark/mllib/util/MLlibTestSparkContext.scala   | 2 ++
 5 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
index 4f7aeac1ec54..c39538014be8 100644
--- a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
@@ -23,7 +23,7 @@
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
-import org.junit.Ignore;
+import org.junit.Test;
 
 import org.apache.spark.api.java.JavaSparkContext;
 import org.apache.spark.sql.SQLContext;
@@ -50,7 +50,7 @@ public void tearDown() {
     Utils.deleteRecursively(tempDir);
   }
 
-  @Ignore // SPARK-11672
+  @Test
   public void testDefaultReadWrite() throws IOException {
     String uid = "my_params";
     MyParams instance = new MyParams(uid);
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index e4c2f1baa4fa..51b06b7eb6d5 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -872,7 +872,7 @@ class LogisticRegressionSuite
     assert(model1a0.intercept ~== model1b.intercept absTol 1E-3)
   }
 
-  ignore("read/write") { // SPARK-11672
+  test("read/write") {
     // Set some Params to make sure set Params are serialized.
     val lr = new LogisticRegression()
       .setElasticNetParam(0.1)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
index a66fe0328193..9dfa1439cc30 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
@@ -68,7 +68,7 @@ class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext with Defau
     }
   }
 
-  ignore("read/write") { // SPARK-11672
+  test("read/write") {
     val binarizer = new Binarizer()
       .setInputCol("feature")
       .setOutputCol("binarized_feature")
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index 44e09c38f937..cac4bd9aa3ab 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -105,7 +105,7 @@ object MyParams extends Readable[MyParams] {
 class DefaultReadWriteSuite extends SparkFunSuite with MLlibTestSparkContext
   with DefaultReadWriteTest {
 
-  ignore("default read/write") { // SPARK-11672
+  test("default read/write") {
     val myParams = new MyParams("my_params")
     testDefaultReadWrite(myParams)
   }
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala b/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
index 5d1796ef6572..998ee4818655 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
@@ -32,11 +32,13 @@ trait MLlibTestSparkContext extends BeforeAndAfterAll { self: Suite =>
       .setMaster("local[2]")
       .setAppName("MLlibUnitTest")
     sc = new SparkContext(conf)
+    SQLContext.clearActive()
     sqlContext = new SQLContext(sc)
   }
 
   override def afterAll() {
     sqlContext = null
+    SQLContext.clearActive()
     if (sc != null) {
       sc.stop()
     }

From ed04846e144db5bdab247c0e1fe2a47b99155c82 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Thu, 12 Nov 2015 20:02:49 -0800
Subject: [PATCH 665/896] [SPARK-11263][SPARKR] lintr Throws Warnings on
 Commented Code in Documentation

Clean out hundreds of `style: Commented code should be removed.` from lintr

Like these:
```
/opt/spark-1.6.0-bin-hadoop2.6/R/pkg/R/DataFrame.R:513:3: style: Commented code should be removed.
# sc <- sparkR.init()
  ^~~~~~~~~~~~~~~~~~~
/opt/spark-1.6.0-bin-hadoop2.6/R/pkg/R/DataFrame.R:514:3: style: Commented code should be removed.
# sqlContext <- sparkRSQL.init(sc)
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/spark-1.6.0-bin-hadoop2.6/R/pkg/R/DataFrame.R:515:3: style: Commented code should be removed.
# path <- "path/to/file.json"
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~
```

tried without export or rdname, neither work
instead, added this `#' noRd` to suppress .Rd file generation

also updated `family` for DataFrame functions for longer descriptive text instead of `dataframe_funcs`
![image](https://cloud.githubusercontent.com/assets/8969467/10933937/17bf5b1e-8291-11e5-9777-40fc632105dc.png)

this covers *most* of 'Commented code' but I left out a few that looks legitimate.

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9463 from felixcheung/rlintr.
---
 R/pkg/R/DataFrame.R        |  232 +++---
 R/pkg/R/RDD.R              | 1585 ++++++++++++++++++------------------
 R/pkg/R/SQLContext.R       |   66 +-
 R/pkg/R/context.R          |  235 +++---
 R/pkg/R/generics.R         |   18 -
 R/pkg/R/pairRDD.R          |  910 +++++++++++----------
 R/pkg/R/sparkR.R           |    3 +-
 R/pkg/inst/profile/shell.R |    2 +-
 8 files changed, 1539 insertions(+), 1512 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index cc868069d1e5..fd105ba5bc9b 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -25,7 +25,7 @@ setOldClass("jobj")
 #' @title S4 class that represents a DataFrame
 #' @description DataFrames can be created using functions like \link{createDataFrame},
 #'              \link{jsonFile}, \link{table} etc.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname DataFrame
 #' @docType class
 #'
@@ -68,7 +68,7 @@ dataFrame <- function(sdf, isCached = FALSE) {
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname printSchema
 #' @name printSchema
 #' @export
@@ -93,7 +93,7 @@ setMethod("printSchema",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname schema
 #' @name schema
 #' @export
@@ -117,7 +117,7 @@ setMethod("schema",
 #'
 #' @param x A SparkSQL DataFrame
 #' @param extended Logical. If extended is False, explain() only prints the physical plan.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname explain
 #' @name explain
 #' @export
@@ -148,7 +148,7 @@ setMethod("explain",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname isLocal
 #' @name isLocal
 #' @export
@@ -173,7 +173,7 @@ setMethod("isLocal",
 #' @param x A SparkSQL DataFrame
 #' @param numRows The number of rows to print. Defaults to 20.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname showDF
 #' @name showDF
 #' @export
@@ -198,7 +198,7 @@ setMethod("showDF",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname show
 #' @name show
 #' @export
@@ -225,7 +225,7 @@ setMethod("show", "DataFrame",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname dtypes
 #' @name dtypes
 #' @export
@@ -251,7 +251,7 @@ setMethod("dtypes",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname columns
 #' @name columns
 #' @aliases names
@@ -272,7 +272,7 @@ setMethod("columns",
             })
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname columns
 #' @name names
 setMethod("names",
@@ -281,7 +281,7 @@ setMethod("names",
             columns(x)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname columns
 #' @name names<-
 setMethod("names<-",
@@ -300,7 +300,7 @@ setMethod("names<-",
 #' @param x A SparkSQL DataFrame
 #' @param tableName A character vector containing the name of the table
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname registerTempTable
 #' @name registerTempTable
 #' @export
@@ -328,7 +328,7 @@ setMethod("registerTempTable",
 #' @param overwrite A logical argument indicating whether or not to overwrite
 #' the existing rows in the table.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname insertInto
 #' @name insertInto
 #' @export
@@ -353,7 +353,7 @@ setMethod("insertInto",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname cache
 #' @name cache
 #' @export
@@ -381,7 +381,7 @@ setMethod("cache",
 #'
 #' @param x The DataFrame to persist
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname persist
 #' @name persist
 #' @export
@@ -409,7 +409,7 @@ setMethod("persist",
 #' @param x The DataFrame to unpersist
 #' @param blocking Whether to block until all blocks are deleted
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname unpersist-methods
 #' @name unpersist
 #' @export
@@ -437,7 +437,7 @@ setMethod("unpersist",
 #' @param x A SparkSQL DataFrame
 #' @param numPartitions The number of partitions to use.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname repartition
 #' @name repartition
 #' @export
@@ -456,25 +456,24 @@ setMethod("repartition",
             dataFrame(sdf)
           })
 
-# toJSON
-#
-# Convert the rows of a DataFrame into JSON objects and return an RDD where
-# each element contains a JSON string.
-#
-# @param x A SparkSQL DataFrame
-# @return A StringRRDD of JSON objects
-#
-# @family dataframe_funcs
-# @rdname tojson
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# sqlContext <- sparkRSQL.init(sc)
-# path <- "path/to/file.json"
-# df <- jsonFile(sqlContext, path)
-# newRDD <- toJSON(df)
-#}
+#' toJSON
+#'
+#' Convert the rows of a DataFrame into JSON objects and return an RDD where
+#' each element contains a JSON string.
+#'
+#' @param x A SparkSQL DataFrame
+#' @return A StringRRDD of JSON objects
+#' @family DataFrame functions
+#' @rdname tojson
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' path <- "path/to/file.json"
+#' df <- jsonFile(sqlContext, path)
+#' newRDD <- toJSON(df)
+#'}
 setMethod("toJSON",
           signature(x = "DataFrame"),
           function(x) {
@@ -491,7 +490,7 @@ setMethod("toJSON",
 #' @param x A SparkSQL DataFrame
 #' @param path The directory where the file is saved
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname saveAsParquetFile
 #' @name saveAsParquetFile
 #' @export
@@ -515,7 +514,7 @@ setMethod("saveAsParquetFile",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname distinct
 #' @name distinct
 #' @export
@@ -538,7 +537,7 @@ setMethod("distinct",
 #
 #' @description Returns a new DataFrame containing distinct rows in this DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname unique
 #' @name unique
 #' @aliases distinct
@@ -556,7 +555,7 @@ setMethod("unique",
 #' @param withReplacement Sampling with replacement or not
 #' @param fraction The (rough) sample target fraction
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname sample
 #' @aliases sample_frac
 #' @export
@@ -580,7 +579,7 @@ setMethod("sample",
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname sample
 #' @name sample_frac
 setMethod("sample_frac",
@@ -596,7 +595,7 @@ setMethod("sample_frac",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname count
 #' @name count
 #' @aliases nrow
@@ -620,7 +619,7 @@ setMethod("count",
 #'
 #' @name nrow
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname nrow
 #' @aliases count
 setMethod("nrow",
@@ -633,7 +632,7 @@ setMethod("nrow",
 #'
 #' @param x a SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname ncol
 #' @name ncol
 #' @export
@@ -654,7 +653,7 @@ setMethod("ncol",
 #' Returns the dimentions (number of rows and columns) of a DataFrame
 #' @param x a SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname dim
 #' @name dim
 #' @export
@@ -678,7 +677,7 @@ setMethod("dim",
 #' @param stringsAsFactors (Optional) A logical indicating whether or not string columns
 #' should be converted to factors. FALSE by default.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname collect
 #' @name collect
 #' @export
@@ -746,7 +745,7 @@ setMethod("collect",
 #' @param num The number of rows to return
 #' @return A new DataFrame containing the number of rows specified.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname limit
 #' @name limit
 #' @export
@@ -767,7 +766,7 @@ setMethod("limit",
 
 #' Take the first NUM rows of a DataFrame and return a the results as a data.frame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname take
 #' @name take
 #' @export
@@ -796,7 +795,7 @@ setMethod("take",
 #' @param num The number of rows to return. Default is 6.
 #' @return A data.frame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname head
 #' @name head
 #' @export
@@ -819,7 +818,7 @@ setMethod("head",
 #'
 #' @param x A SparkSQL DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname first
 #' @name first
 #' @export
@@ -837,23 +836,21 @@ setMethod("first",
             take(x, 1)
           })
 
-# toRDD
-#
-# Converts a Spark DataFrame to an RDD while preserving column names.
-#
-# @param x A Spark DataFrame
-#
-# @family dataframe_funcs
-# @rdname DataFrame
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# sqlContext <- sparkRSQL.init(sc)
-# path <- "path/to/file.json"
-# df <- jsonFile(sqlContext, path)
-# rdd <- toRDD(df)
-# }
+#' toRDD
+#'
+#' Converts a Spark DataFrame to an RDD while preserving column names.
+#'
+#' @param x A Spark DataFrame
+#'
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' path <- "path/to/file.json"
+#' df <- jsonFile(sqlContext, path)
+#' rdd <- toRDD(df)
+#'}
 setMethod("toRDD",
           signature(x = "DataFrame"),
           function(x) {
@@ -874,7 +871,7 @@ setMethod("toRDD",
 #' @return a GroupedData
 #' @seealso GroupedData
 #' @aliases group_by
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname groupBy
 #' @name groupBy
 #' @export
@@ -899,7 +896,7 @@ setMethod("groupBy",
              groupedData(sgd)
            })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname groupBy
 #' @name group_by
 setMethod("group_by",
@@ -913,7 +910,7 @@ setMethod("group_by",
 #' Compute aggregates by specifying a list of columns
 #'
 #' @param x a DataFrame
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname agg
 #' @name agg
 #' @aliases summarize
@@ -924,7 +921,7 @@ setMethod("agg",
             agg(groupBy(x), ...)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname agg
 #' @name summarize
 setMethod("summarize",
@@ -940,8 +937,8 @@ setMethod("summarize",
 # the requested map function.                                                     #
 ###################################################################################
 
-# @family dataframe_funcs
-# @rdname lapply
+#' @rdname lapply
+#' @noRd
 setMethod("lapply",
           signature(X = "DataFrame", FUN = "function"),
           function(X, FUN) {
@@ -949,24 +946,25 @@ setMethod("lapply",
             lapply(rdd, FUN)
           })
 
-# @family dataframe_funcs
-# @rdname lapply
+#' @rdname lapply
+#' @noRd
 setMethod("map",
           signature(X = "DataFrame", FUN = "function"),
           function(X, FUN) {
             lapply(X, FUN)
           })
 
-# @family dataframe_funcs
-# @rdname flatMap
+#' @rdname flatMap
+#' @noRd
 setMethod("flatMap",
           signature(X = "DataFrame", FUN = "function"),
           function(X, FUN) {
             rdd <- toRDD(X)
             flatMap(rdd, FUN)
           })
-# @family dataframe_funcs
-# @rdname lapplyPartition
+
+#' @rdname lapplyPartition
+#' @noRd
 setMethod("lapplyPartition",
           signature(X = "DataFrame", FUN = "function"),
           function(X, FUN) {
@@ -974,16 +972,16 @@ setMethod("lapplyPartition",
             lapplyPartition(rdd, FUN)
           })
 
-# @family dataframe_funcs
-# @rdname lapplyPartition
+#' @rdname lapplyPartition
+#' @noRd
 setMethod("mapPartitions",
           signature(X = "DataFrame", FUN = "function"),
           function(X, FUN) {
             lapplyPartition(X, FUN)
           })
 
-# @family dataframe_funcs
-# @rdname foreach
+#' @rdname foreach
+#' @noRd
 setMethod("foreach",
           signature(x = "DataFrame", func = "function"),
           function(x, func) {
@@ -991,8 +989,8 @@ setMethod("foreach",
             foreach(rdd, func)
           })
 
-# @family dataframe_funcs
-# @rdname foreach
+#' @rdname foreach
+#' @noRd
 setMethod("foreachPartition",
           signature(x = "DataFrame", func = "function"),
           function(x, func) {
@@ -1091,7 +1089,7 @@ setMethod("[", signature(x = "DataFrame", i = "Column"),
 #' @param select expression for the single Column or a list of columns to select from the DataFrame
 #' @return A new DataFrame containing only the rows that meet the condition with selected columns
 #' @export
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname subset
 #' @name subset
 #' @aliases [
@@ -1122,7 +1120,7 @@ setMethod("subset", signature(x = "DataFrame"),
 #' @param col A list of columns or single Column or name
 #' @return A new DataFrame with selected columns
 #' @export
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname select
 #' @name select
 #' @family subsetting functions
@@ -1150,7 +1148,7 @@ setMethod("select", signature(x = "DataFrame", col = "character"),
             }
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname select
 #' @export
 setMethod("select", signature(x = "DataFrame", col = "Column"),
@@ -1162,7 +1160,7 @@ setMethod("select", signature(x = "DataFrame", col = "Column"),
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname select
 #' @export
 setMethod("select",
@@ -1187,7 +1185,7 @@ setMethod("select",
 #' @param expr A string containing a SQL expression
 #' @param ... Additional expressions
 #' @return A DataFrame
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname selectExpr
 #' @name selectExpr
 #' @export
@@ -1215,7 +1213,7 @@ setMethod("selectExpr",
 #' @param colName A string containing the name of the new column.
 #' @param col A Column expression.
 #' @return A DataFrame with the new column added.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname withColumn
 #' @name withColumn
 #' @aliases mutate transform
@@ -1241,7 +1239,7 @@ setMethod("withColumn",
 #' @param .data A DataFrame
 #' @param col a named argument of the form name = col
 #' @return A new DataFrame with the new columns added.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname withColumn
 #' @name mutate
 #' @aliases withColumn transform
@@ -1275,7 +1273,7 @@ setMethod("mutate",
           })
 
 #' @export
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname withColumn
 #' @name transform
 #' @aliases withColumn mutate
@@ -1293,7 +1291,7 @@ setMethod("transform",
 #' @param existingCol The name of the column you want to change.
 #' @param newCol The new column name.
 #' @return A DataFrame with the column name changed.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname withColumnRenamed
 #' @name withColumnRenamed
 #' @export
@@ -1325,7 +1323,7 @@ setMethod("withColumnRenamed",
 #' @param x A DataFrame
 #' @param newCol A named pair of the form new_column_name = existing_column
 #' @return A DataFrame with the column name changed.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname withColumnRenamed
 #' @name rename
 #' @aliases withColumnRenamed
@@ -1370,7 +1368,7 @@ setClassUnion("characterOrColumn", c("character", "Column"))
 #' @param decreasing A logical argument indicating sorting order for columns when
 #'                   a character vector is specified for col
 #' @return A DataFrame where all elements are sorted.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname arrange
 #' @name arrange
 #' @aliases orderby
@@ -1397,7 +1395,7 @@ setMethod("arrange",
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname arrange
 #' @export
 setMethod("arrange",
@@ -1429,7 +1427,7 @@ setMethod("arrange",
             do.call("arrange", c(x, jcols))
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname arrange
 #' @name orderby
 setMethod("orderBy",
@@ -1446,7 +1444,7 @@ setMethod("orderBy",
 #' @param condition The condition to filter on. This may either be a Column expression
 #' or a string containing a SQL statement
 #' @return A DataFrame containing only the rows that meet the condition.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname filter
 #' @name filter
 #' @family subsetting functions
@@ -1470,7 +1468,7 @@ setMethod("filter",
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname filter
 #' @name where
 setMethod("where",
@@ -1491,7 +1489,7 @@ setMethod("where",
 #' 'inner', 'outer', 'full', 'fullouter', leftouter', 'left_outer', 'left',
 #' 'right_outer', 'rightouter', 'right', and 'leftsemi'. The default joinType is "inner".
 #' @return A DataFrame containing the result of the join operation.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname join
 #' @name join
 #' @export
@@ -1550,7 +1548,7 @@ setMethod("join",
 #'   be returned. If all.x is set to FALSE and all.y is set to TRUE, a right
 #'   outer join will be returned. If all.x and all.y are set to TRUE, a full
 #'   outer join will be returned.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname merge
 #' @export
 #' @examples
@@ -1682,7 +1680,7 @@ generateAliasesForIntersectedCols <- function (x, intersectedColNames, suffix) {
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the union.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname unionAll
 #' @name unionAll
 #' @export
@@ -1705,7 +1703,7 @@ setMethod("unionAll",
 #'
 #' @description Returns a new DataFrame containing rows of all parameters.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname rbind
 #' @name rbind
 #' @aliases unionAll
@@ -1727,7 +1725,7 @@ setMethod("rbind",
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the intersect.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname intersect
 #' @name intersect
 #' @export
@@ -1754,7 +1752,7 @@ setMethod("intersect",
 #' @param x A Spark DataFrame
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the except operation.
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname except
 #' @name except
 #' @export
@@ -1794,7 +1792,7 @@ setMethod("except",
 #' @param source A name for external data source
 #' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname write.df
 #' @name write.df
 #' @aliases saveDF
@@ -1830,7 +1828,7 @@ setMethod("write.df",
             callJMethod(df@sdf, "save", source, jmode, options)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname write.df
 #' @name saveDF
 #' @export
@@ -1861,7 +1859,7 @@ setMethod("saveDF",
 #' @param source A name for external data source
 #' @param mode One of 'append', 'overwrite', 'error', 'ignore' save mode
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname saveAsTable
 #' @name saveAsTable
 #' @export
@@ -1902,7 +1900,7 @@ setMethod("saveAsTable",
 #' @param col A string of name
 #' @param ... Additional expressions
 #' @return A DataFrame
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname describe
 #' @name describe
 #' @aliases summary
@@ -1925,7 +1923,7 @@ setMethod("describe",
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname describe
 #' @name describe
 setMethod("describe",
@@ -1940,7 +1938,7 @@ setMethod("describe",
 #'
 #' @description Computes statistics for numeric columns of the DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname summary
 #' @name summary
 setMethod("summary",
@@ -1965,7 +1963,7 @@ setMethod("summary",
 #' @param cols Optional list of column names to consider.
 #' @return A DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname nafunctions
 #' @name dropna
 #' @aliases na.omit
@@ -1995,7 +1993,7 @@ setMethod("dropna",
             dataFrame(sdf)
           })
 
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname nafunctions
 #' @name na.omit
 #' @export
@@ -2023,7 +2021,7 @@ setMethod("na.omit",
 #'             column is simply ignored.
 #' @return A DataFrame
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname nafunctions
 #' @name fillna
 #' @export
@@ -2087,7 +2085,7 @@ setMethod("fillna",
 #' @title Download data from a DataFrame into a data.frame
 #' @param x a DataFrame
 #' @return a data.frame
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname as.data.frame
 #' @examples \dontrun{
 #'
@@ -2108,7 +2106,7 @@ setMethod("as.data.frame",
 #' the DataFrame is searched by R when evaluating a variable, so columns in
 #' the DataFrame can be accessed by simply giving their names.
 #'
-#' @family dataframe_funcs
+#' @family DataFrame functions
 #' @rdname attach
 #' @title Attach DataFrame to R search path
 #' @param what (DataFrame) The DataFrame to attach
diff --git a/R/pkg/R/RDD.R b/R/pkg/R/RDD.R
index 051e441d4e06..47945c2825da 100644
--- a/R/pkg/R/RDD.R
+++ b/R/pkg/R/RDD.R
@@ -19,16 +19,15 @@
 
 setOldClass("jobj")
 
-# @title S4 class that represents an RDD
-# @description RDD can be created using functions like
-#              \code{parallelize}, \code{textFile} etc.
-# @rdname RDD
-# @seealso parallelize, textFile
-#
-# @slot env An R environment that stores bookkeeping states of the RDD
-# @slot jrdd Java object reference to the backing JavaRDD
-# to an RDD
-# @export
+#' @title S4 class that represents an RDD
+#' @description RDD can be created using functions like
+#'              \code{parallelize}, \code{textFile} etc.
+#' @rdname RDD
+#' @seealso parallelize, textFile
+#' @slot env An R environment that stores bookkeeping states of the RDD
+#' @slot jrdd Java object reference to the backing JavaRDD
+#' to an RDD
+#' @noRd
 setClass("RDD",
          slots = list(env = "environment",
                       jrdd = "jobj"))
@@ -111,14 +110,13 @@ setMethod("initialize", "PipelinedRDD", function(.Object, prev, func, jrdd_val)
   .Object
 })
 
-# @rdname RDD
-# @export
-#
-# @param jrdd Java object reference to the backing JavaRDD
-# @param serializedMode Use "byte" if the RDD stores data serialized in R, "string" if the RDD
-# stores strings, and "row" if the RDD stores the rows of a DataFrame
-# @param isCached TRUE if the RDD is cached
-# @param isCheckpointed TRUE if the RDD has been checkpointed
+#' @rdname RDD
+#' @noRd
+#' @param jrdd Java object reference to the backing JavaRDD
+#' @param serializedMode Use "byte" if the RDD stores data serialized in R, "string" if the RDD
+#' stores strings, and "row" if the RDD stores the rows of a DataFrame
+#' @param isCached TRUE if the RDD is cached
+#' @param isCheckpointed TRUE if the RDD has been checkpointed
 RDD <- function(jrdd, serializedMode = "byte", isCached = FALSE,
                 isCheckpointed = FALSE) {
   new("RDD", jrdd, serializedMode, isCached, isCheckpointed)
@@ -201,19 +199,20 @@ setValidity("RDD",
 
 ############ Actions and Transformations ############
 
-# Persist an RDD
-#
-# Persist this RDD with the default storage level (MEMORY_ONLY).
-#
-# @param x The RDD to cache
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2L)
-# cache(rdd)
-#}
-# @rdname cache-methods
-# @aliases cache,RDD-method
+#' Persist an RDD
+#'
+#' Persist this RDD with the default storage level (MEMORY_ONLY).
+#'
+#' @param x The RDD to cache
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' cache(rdd)
+#'}
+#' @rdname cache-methods
+#' @aliases cache,RDD-method
+#' @noRd
 setMethod("cache",
           signature(x = "RDD"),
           function(x) {
@@ -222,22 +221,23 @@ setMethod("cache",
             x
           })
 
-# Persist an RDD
-#
-# Persist this RDD with the specified storage level. For details of the
-# supported storage levels, refer to
-# http://spark.apache.org/docs/latest/programming-guide.html#rdd-persistence.
-#
-# @param x The RDD to persist
-# @param newLevel The new storage level to be assigned
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2L)
-# persist(rdd, "MEMORY_AND_DISK")
-#}
-# @rdname persist
-# @aliases persist,RDD-method
+#' Persist an RDD
+#'
+#' Persist this RDD with the specified storage level. For details of the
+#' supported storage levels, refer to
+#' http://spark.apache.org/docs/latest/programming-guide.html#rdd-persistence.
+#'
+#' @param x The RDD to persist
+#' @param newLevel The new storage level to be assigned
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' persist(rdd, "MEMORY_AND_DISK")
+#'}
+#' @rdname persist
+#' @aliases persist,RDD-method
+#' @noRd
 setMethod("persist",
           signature(x = "RDD", newLevel = "character"),
           function(x, newLevel = "MEMORY_ONLY") {
@@ -246,21 +246,22 @@ setMethod("persist",
             x
           })
 
-# Unpersist an RDD
-#
-# Mark the RDD as non-persistent, and remove all blocks for it from memory and
-# disk.
-#
-# @param x The RDD to unpersist
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2L)
-# cache(rdd) # rdd@@env$isCached == TRUE
-# unpersist(rdd) # rdd@@env$isCached == FALSE
-#}
-# @rdname unpersist-methods
-# @aliases unpersist,RDD-method
+#' Unpersist an RDD
+#'
+#' Mark the RDD as non-persistent, and remove all blocks for it from memory and
+#' disk.
+#'
+#' @param x The RDD to unpersist
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' cache(rdd) # rdd@@env$isCached == TRUE
+#' unpersist(rdd) # rdd@@env$isCached == FALSE
+#'}
+#' @rdname unpersist-methods
+#' @aliases unpersist,RDD-method
+#' @noRd
 setMethod("unpersist",
           signature(x = "RDD"),
           function(x) {
@@ -269,24 +270,25 @@ setMethod("unpersist",
             x
           })
 
-# Checkpoint an RDD
-#
-# Mark this RDD for checkpointing. It will be saved to a file inside the
-# checkpoint directory set with setCheckpointDir() and all references to its
-# parent RDDs will be removed. This function must be called before any job has
-# been executed on this RDD. It is strongly recommended that this RDD is
-# persisted in memory, otherwise saving it on a file will require recomputation.
-#
-# @param x The RDD to checkpoint
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# setCheckpointDir(sc, "checkpoint")
-# rdd <- parallelize(sc, 1:10, 2L)
-# checkpoint(rdd)
-#}
-# @rdname checkpoint-methods
-# @aliases checkpoint,RDD-method
+#' Checkpoint an RDD
+#'
+#' Mark this RDD for checkpointing. It will be saved to a file inside the
+#' checkpoint directory set with setCheckpointDir() and all references to its
+#' parent RDDs will be removed. This function must be called before any job has
+#' been executed on this RDD. It is strongly recommended that this RDD is
+#' persisted in memory, otherwise saving it on a file will require recomputation.
+#'
+#' @param x The RDD to checkpoint
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' setCheckpointDir(sc, "checkpoint")
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' checkpoint(rdd)
+#'}
+#' @rdname checkpoint-methods
+#' @aliases checkpoint,RDD-method
+#' @noRd
 setMethod("checkpoint",
           signature(x = "RDD"),
           function(x) {
@@ -296,18 +298,19 @@ setMethod("checkpoint",
             x
           })
 
-# Gets the number of partitions of an RDD
-#
-# @param x A RDD.
-# @return the number of partitions of rdd as an integer.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2L)
-# numPartitions(rdd)  # 2L
-#}
-# @rdname numPartitions
-# @aliases numPartitions,RDD-method
+#' Gets the number of partitions of an RDD
+#'
+#' @param x A RDD.
+#' @return the number of partitions of rdd as an integer.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' numPartitions(rdd)  # 2L
+#'}
+#' @rdname numPartitions
+#' @aliases numPartitions,RDD-method
+#' @noRd
 setMethod("numPartitions",
           signature(x = "RDD"),
           function(x) {
@@ -316,24 +319,25 @@ setMethod("numPartitions",
             callJMethod(partitions, "size")
           })
 
-# Collect elements of an RDD
-#
-# @description
-# \code{collect} returns a list that contains all of the elements in this RDD.
-#
-# @param x The RDD to collect
-# @param ... Other optional arguments to collect
-# @param flatten FALSE if the list should not flattened
-# @return a list containing elements in the RDD
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2L)
-# collect(rdd) # list from 1 to 10
-# collectPartition(rdd, 0L) # list from 1 to 5
-#}
-# @rdname collect-methods
-# @aliases collect,RDD-method
+#' Collect elements of an RDD
+#'
+#' @description
+#' \code{collect} returns a list that contains all of the elements in this RDD.
+#'
+#' @param x The RDD to collect
+#' @param ... Other optional arguments to collect
+#' @param flatten FALSE if the list should not flattened
+#' @return a list containing elements in the RDD
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2L)
+#' collect(rdd) # list from 1 to 10
+#' collectPartition(rdd, 0L) # list from 1 to 5
+#'}
+#' @rdname collect-methods
+#' @aliases collect,RDD-method
+#' @noRd
 setMethod("collect",
           signature(x = "RDD"),
           function(x, flatten = TRUE) {
@@ -344,12 +348,13 @@ setMethod("collect",
           })
 
 
-# @description
-# \code{collectPartition} returns a list that contains all of the elements
-# in the specified partition of the RDD.
-# @param partitionId the partition to collect (starts from 0)
-# @rdname collect-methods
-# @aliases collectPartition,integer,RDD-method
+#' @description
+#' \code{collectPartition} returns a list that contains all of the elements
+#' in the specified partition of the RDD.
+#' @param partitionId the partition to collect (starts from 0)
+#' @rdname collect-methods
+#' @aliases collectPartition,integer,RDD-method
+#' @noRd
 setMethod("collectPartition",
           signature(x = "RDD", partitionId = "integer"),
           function(x, partitionId) {
@@ -362,17 +367,18 @@ setMethod("collectPartition",
               serializedMode = getSerializedMode(x))
           })
 
-# @description
-# \code{collectAsMap} returns a named list as a map that contains all of the elements
-# in a key-value pair RDD.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, 2), list(3, 4)), 2L)
-# collectAsMap(rdd) # list(`1` = 2, `3` = 4)
-#}
-# @rdname collect-methods
-# @aliases collectAsMap,RDD-method
+#' @description
+#' \code{collectAsMap} returns a named list as a map that contains all of the elements
+#' in a key-value pair RDD.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, 2), list(3, 4)), 2L)
+#' collectAsMap(rdd) # list(`1` = 2, `3` = 4)
+#'}
+#' @rdname collect-methods
+#' @aliases collectAsMap,RDD-method
+#' @noRd
 setMethod("collectAsMap",
           signature(x = "RDD"),
           function(x) {
@@ -382,19 +388,20 @@ setMethod("collectAsMap",
             as.list(map)
           })
 
-# Return the number of elements in the RDD.
-#
-# @param x The RDD to count
-# @return number of elements in the RDD.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# count(rdd) # 10
-# length(rdd) # Same as count
-#}
-# @rdname count
-# @aliases count,RDD-method
+#' Return the number of elements in the RDD.
+#'
+#' @param x The RDD to count
+#' @return number of elements in the RDD.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' count(rdd) # 10
+#' length(rdd) # Same as count
+#'}
+#' @rdname count
+#' @aliases count,RDD-method
+#' @noRd
 setMethod("count",
           signature(x = "RDD"),
           function(x) {
@@ -406,31 +413,32 @@ setMethod("count",
             sum(as.integer(vals))
           })
 
-# Return the number of elements in the RDD
-# @export
-# @rdname count
+#' Return the number of elements in the RDD
+#' @rdname count
+#' @noRd
 setMethod("length",
           signature(x = "RDD"),
           function(x) {
             count(x)
           })
 
-# Return the count of each unique value in this RDD as a list of
-# (value, count) pairs.
-#
-# Same as countByValue in Spark.
-#
-# @param x The RDD to count
-# @return list of (value, count) pairs, where count is number of each unique
-# value in rdd.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, c(1,2,3,2,1))
-# countByValue(rdd) # (1,2L), (2,2L), (3,1L)
-#}
-# @rdname countByValue
-# @aliases countByValue,RDD-method
+#' Return the count of each unique value in this RDD as a list of
+#' (value, count) pairs.
+#'
+#' Same as countByValue in Spark.
+#'
+#' @param x The RDD to count
+#' @return list of (value, count) pairs, where count is number of each unique
+#' value in rdd.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, c(1,2,3,2,1))
+#' countByValue(rdd) # (1,2L), (2,2L), (3,1L)
+#'}
+#' @rdname countByValue
+#' @aliases countByValue,RDD-method
+#' @noRd
 setMethod("countByValue",
           signature(x = "RDD"),
           function(x) {
@@ -438,23 +446,24 @@ setMethod("countByValue",
             collect(reduceByKey(ones, `+`, numPartitions(x)))
           })
 
-# Apply a function to all elements
-#
-# This function creates a new RDD by applying the given transformation to all
-# elements of the given RDD
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on each element
-# @return a new RDD created by the transformation.
-# @rdname lapply
-# @aliases lapply
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# multiplyByTwo <- lapply(rdd, function(x) { x * 2 })
-# collect(multiplyByTwo) # 2,4,6...
-#}
+#' Apply a function to all elements
+#'
+#' This function creates a new RDD by applying the given transformation to all
+#' elements of the given RDD
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on each element
+#' @return a new RDD created by the transformation.
+#' @rdname lapply
+#' @noRd
+#' @aliases lapply
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' multiplyByTwo <- lapply(rdd, function(x) { x * 2 })
+#' collect(multiplyByTwo) # 2,4,6...
+#'}
 setMethod("lapply",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
@@ -464,31 +473,33 @@ setMethod("lapply",
             lapplyPartitionsWithIndex(X, func)
           })
 
-# @rdname lapply
-# @aliases map,RDD,function-method
+#' @rdname lapply
+#' @aliases map,RDD,function-method
+#' @noRd
 setMethod("map",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
             lapply(X, FUN)
           })
 
-# Flatten results after apply a function to all elements
-#
-# This function return a new RDD by first applying a function to all
-# elements of this RDD, and then flattening the results.
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on each element
-# @return a new RDD created by the transformation.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# multiplyByTwo <- flatMap(rdd, function(x) { list(x*2, x*10) })
-# collect(multiplyByTwo) # 2,20,4,40,6,60...
-#}
-# @rdname flatMap
-# @aliases flatMap,RDD,function-method
+#' Flatten results after apply a function to all elements
+#'
+#' This function return a new RDD by first applying a function to all
+#' elements of this RDD, and then flattening the results.
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on each element
+#' @return a new RDD created by the transformation.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' multiplyByTwo <- flatMap(rdd, function(x) { list(x*2, x*10) })
+#' collect(multiplyByTwo) # 2,20,4,40,6,60...
+#'}
+#' @rdname flatMap
+#' @aliases flatMap,RDD,function-method
+#' @noRd
 setMethod("flatMap",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
@@ -501,83 +512,88 @@ setMethod("flatMap",
             lapplyPartition(X, partitionFunc)
           })
 
-# Apply a function to each partition of an RDD
-#
-# Return a new RDD by applying a function to each partition of this RDD.
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on each partition.
-# @return a new RDD created by the transformation.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# partitionSum <- lapplyPartition(rdd, function(part) { Reduce("+", part) })
-# collect(partitionSum) # 15, 40
-#}
-# @rdname lapplyPartition
-# @aliases lapplyPartition,RDD,function-method
+#' Apply a function to each partition of an RDD
+#'
+#' Return a new RDD by applying a function to each partition of this RDD.
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on each partition.
+#' @return a new RDD created by the transformation.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' partitionSum <- lapplyPartition(rdd, function(part) { Reduce("+", part) })
+#' collect(partitionSum) # 15, 40
+#'}
+#' @rdname lapplyPartition
+#' @aliases lapplyPartition,RDD,function-method
+#' @noRd
 setMethod("lapplyPartition",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
             lapplyPartitionsWithIndex(X, function(s, part) { FUN(part) })
           })
 
-# mapPartitions is the same as lapplyPartition.
-#
-# @rdname lapplyPartition
-# @aliases mapPartitions,RDD,function-method
+#' mapPartitions is the same as lapplyPartition.
+#'
+#' @rdname lapplyPartition
+#' @aliases mapPartitions,RDD,function-method
+#' @noRd
 setMethod("mapPartitions",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
             lapplyPartition(X, FUN)
           })
 
-# Return a new RDD by applying a function to each partition of this RDD, while
-# tracking the index of the original partition.
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on each partition; takes the partition
-#        index and a list of elements in the particular partition.
-# @return a new RDD created by the transformation.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 5L)
-# prod <- lapplyPartitionsWithIndex(rdd, function(partIndex, part) {
-#                                          partIndex * Reduce("+", part) })
-# collect(prod, flatten = FALSE) # 0, 7, 22, 45, 76
-#}
-# @rdname lapplyPartitionsWithIndex
-# @aliases lapplyPartitionsWithIndex,RDD,function-method
+#' Return a new RDD by applying a function to each partition of this RDD, while
+#' tracking the index of the original partition.
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on each partition; takes the partition
+#'        index and a list of elements in the particular partition.
+#' @return a new RDD created by the transformation.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 5L)
+#' prod <- lapplyPartitionsWithIndex(rdd, function(partIndex, part) {
+#'                                          partIndex * Reduce("+", part) })
+#' collect(prod, flatten = FALSE) # 0, 7, 22, 45, 76
+#'}
+#' @rdname lapplyPartitionsWithIndex
+#' @aliases lapplyPartitionsWithIndex,RDD,function-method
+#' @noRd
 setMethod("lapplyPartitionsWithIndex",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
             PipelinedRDD(X, FUN)
           })
 
-# @rdname lapplyPartitionsWithIndex
-# @aliases mapPartitionsWithIndex,RDD,function-method
+#' @rdname lapplyPartitionsWithIndex
+#' @aliases mapPartitionsWithIndex,RDD,function-method
+#' @noRd
 setMethod("mapPartitionsWithIndex",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
             lapplyPartitionsWithIndex(X, FUN)
           })
 
-# This function returns a new RDD containing only the elements that satisfy
-# a predicate (i.e. returning TRUE in a given logical function).
-# The same as `filter()' in Spark.
-#
-# @param x The RDD to be filtered.
-# @param f A unary predicate function.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# unlist(collect(filterRDD(rdd, function (x) { x < 3 }))) # c(1, 2)
-#}
-# @rdname filterRDD
-# @aliases filterRDD,RDD,function-method
+#' This function returns a new RDD containing only the elements that satisfy
+#' a predicate (i.e. returning TRUE in a given logical function).
+#' The same as `filter()' in Spark.
+#'
+#' @param x The RDD to be filtered.
+#' @param f A unary predicate function.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' unlist(collect(filterRDD(rdd, function (x) { x < 3 }))) # c(1, 2)
+#'}
+#' @rdname filterRDD
+#' @aliases filterRDD,RDD,function-method
+#' @noRd
 setMethod("filterRDD",
           signature(x = "RDD", f = "function"),
           function(x, f) {
@@ -587,30 +603,32 @@ setMethod("filterRDD",
             lapplyPartition(x, filter.func)
           })
 
-# @rdname filterRDD
-# @aliases Filter
+#' @rdname filterRDD
+#' @aliases Filter
+#' @noRd
 setMethod("Filter",
           signature(f = "function", x = "RDD"),
           function(f, x) {
             filterRDD(x, f)
           })
 
-# Reduce across elements of an RDD.
-#
-# This function reduces the elements of this RDD using the
-# specified commutative and associative binary operator.
-#
-# @param x The RDD to reduce
-# @param func Commutative and associative function to apply on elements
-#             of the RDD.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# reduce(rdd, "+") # 55
-#}
-# @rdname reduce
-# @aliases reduce,RDD,ANY-method
+#' Reduce across elements of an RDD.
+#'
+#' This function reduces the elements of this RDD using the
+#' specified commutative and associative binary operator.
+#'
+#' @param x The RDD to reduce
+#' @param func Commutative and associative function to apply on elements
+#'             of the RDD.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' reduce(rdd, "+") # 55
+#'}
+#' @rdname reduce
+#' @aliases reduce,RDD,ANY-method
+#' @noRd
 setMethod("reduce",
           signature(x = "RDD", func = "ANY"),
           function(x, func) {
@@ -624,70 +642,74 @@ setMethod("reduce",
             Reduce(func, partitionList)
           })
 
-# Get the maximum element of an RDD.
-#
-# @param x The RDD to get the maximum element from
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# maximum(rdd) # 10
-#}
-# @rdname maximum
-# @aliases maximum,RDD
+#' Get the maximum element of an RDD.
+#'
+#' @param x The RDD to get the maximum element from
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' maximum(rdd) # 10
+#'}
+#' @rdname maximum
+#' @aliases maximum,RDD
+#' @noRd
 setMethod("maximum",
           signature(x = "RDD"),
           function(x) {
             reduce(x, max)
           })
 
-# Get the minimum element of an RDD.
-#
-# @param x The RDD to get the minimum element from
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# minimum(rdd) # 1
-#}
-# @rdname minimum
-# @aliases minimum,RDD
+#' Get the minimum element of an RDD.
+#'
+#' @param x The RDD to get the minimum element from
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' minimum(rdd) # 1
+#'}
+#' @rdname minimum
+#' @aliases minimum,RDD
+#' @noRd
 setMethod("minimum",
           signature(x = "RDD"),
           function(x) {
             reduce(x, min)
           })
 
-# Add up the elements in an RDD.
-#
-# @param x The RDD to add up the elements in
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# sumRDD(rdd) # 55
-#}
-# @rdname sumRDD
-# @aliases sumRDD,RDD
+#' Add up the elements in an RDD.
+#'
+#' @param x The RDD to add up the elements in
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' sumRDD(rdd) # 55
+#'}
+#' @rdname sumRDD
+#' @aliases sumRDD,RDD
+#' @noRd
 setMethod("sumRDD",
           signature(x = "RDD"),
           function(x) {
             reduce(x, "+")
           })
 
-# Applies a function to all elements in an RDD, and force evaluation.
-#
-# @param x The RDD to apply the function
-# @param func The function to be applied.
-# @return invisible NULL.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# foreach(rdd, function(x) { save(x, file=...) })
-#}
-# @rdname foreach
-# @aliases foreach,RDD,function-method
+#' Applies a function to all elements in an RDD, and force evaluation.
+#'
+#' @param x The RDD to apply the function
+#' @param func The function to be applied.
+#' @return invisible NULL.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' foreach(rdd, function(x) { save(x, file=...) })
+#'}
+#' @rdname foreach
+#' @aliases foreach,RDD,function-method
+#' @noRd
 setMethod("foreach",
           signature(x = "RDD", func = "function"),
           function(x, func) {
@@ -698,37 +720,39 @@ setMethod("foreach",
             invisible(collect(mapPartitions(x, partition.func)))
           })
 
-# Applies a function to each partition in an RDD, and force evaluation.
-#
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# foreachPartition(rdd, function(part) { save(part, file=...); NULL })
-#}
-# @rdname foreach
-# @aliases foreachPartition,RDD,function-method
+#' Applies a function to each partition in an RDD, and force evaluation.
+#'
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' foreachPartition(rdd, function(part) { save(part, file=...); NULL })
+#'}
+#' @rdname foreach
+#' @aliases foreachPartition,RDD,function-method
+#' @noRd
 setMethod("foreachPartition",
           signature(x = "RDD", func = "function"),
           function(x, func) {
             invisible(collect(mapPartitions(x, func)))
           })
 
-# Take elements from an RDD.
-#
-# This function takes the first NUM elements in the RDD and
-# returns them in a list.
-#
-# @param x The RDD to take elements from
-# @param num Number of elements to take
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# take(rdd, 2L) # list(1, 2)
-#}
-# @rdname take
-# @aliases take,RDD,numeric-method
+#' Take elements from an RDD.
+#'
+#' This function takes the first NUM elements in the RDD and
+#' returns them in a list.
+#'
+#' @param x The RDD to take elements from
+#' @param num Number of elements to take
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' take(rdd, 2L) # list(1, 2)
+#'}
+#' @rdname take
+#' @aliases take,RDD,numeric-method
+#' @noRd
 setMethod("take",
           signature(x = "RDD", num = "numeric"),
           function(x, num) {
@@ -763,39 +787,40 @@ setMethod("take",
           })
 
 
-# First
-#
-# Return the first element of an RDD
-#
-# @rdname first
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# first(rdd)
-# }
+#' First
+#'
+#' Return the first element of an RDD
+#'
+#' @rdname first
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' first(rdd)
+#' }
+#' @noRd
 setMethod("first",
           signature(x = "RDD"),
           function(x) {
             take(x, 1)[[1]]
           })
 
-# Removes the duplicates from RDD.
-#
-# This function returns a new RDD containing the distinct elements in the
-# given RDD. The same as `distinct()' in Spark.
-#
-# @param x The RDD to remove duplicates from.
-# @param numPartitions Number of partitions to create.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, c(1,2,2,3,3,3))
-# sort(unlist(collect(distinct(rdd)))) # c(1, 2, 3)
-#}
-# @rdname distinct
-# @aliases distinct,RDD-method
+#' Removes the duplicates from RDD.
+#'
+#' This function returns a new RDD containing the distinct elements in the
+#' given RDD. The same as `distinct()' in Spark.
+#'
+#' @param x The RDD to remove duplicates from.
+#' @param numPartitions Number of partitions to create.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, c(1,2,2,3,3,3))
+#' sort(unlist(collect(distinct(rdd)))) # c(1, 2, 3)
+#'}
+#' @rdname distinct
+#' @aliases distinct,RDD-method
+#' @noRd
 setMethod("distinct",
           signature(x = "RDD"),
           function(x, numPartitions = SparkR:::numPartitions(x)) {
@@ -807,24 +832,25 @@ setMethod("distinct",
             resRDD
           })
 
-# Return an RDD that is a sampled subset of the given RDD.
-#
-# The same as `sample()' in Spark. (We rename it due to signature
-# inconsistencies with the `sample()' function in R's base package.)
-#
-# @param x The RDD to sample elements from
-# @param withReplacement Sampling with replacement or not
-# @param fraction The (rough) sample target fraction
-# @param seed Randomness seed value
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# collect(sampleRDD(rdd, FALSE, 0.5, 1618L)) # ~5 distinct elements
-# collect(sampleRDD(rdd, TRUE, 0.5, 9L)) # ~5 elements possibly with duplicates
-#}
-# @rdname sampleRDD
-# @aliases sampleRDD,RDD
+#' Return an RDD that is a sampled subset of the given RDD.
+#'
+#' The same as `sample()' in Spark. (We rename it due to signature
+#' inconsistencies with the `sample()' function in R's base package.)
+#'
+#' @param x The RDD to sample elements from
+#' @param withReplacement Sampling with replacement or not
+#' @param fraction The (rough) sample target fraction
+#' @param seed Randomness seed value
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' collect(sampleRDD(rdd, FALSE, 0.5, 1618L)) # ~5 distinct elements
+#' collect(sampleRDD(rdd, TRUE, 0.5, 9L)) # ~5 elements possibly with duplicates
+#'}
+#' @rdname sampleRDD
+#' @aliases sampleRDD,RDD
+#' @noRd
 setMethod("sampleRDD",
           signature(x = "RDD", withReplacement = "logical",
                     fraction = "numeric", seed = "integer"),
@@ -868,23 +894,24 @@ setMethod("sampleRDD",
             lapplyPartitionsWithIndex(x, samplingFunc)
           })
 
-# Return a list of the elements that are a sampled subset of the given RDD.
-#
-# @param x The RDD to sample elements from
-# @param withReplacement Sampling with replacement or not
-# @param num Number of elements to return
-# @param seed Randomness seed value
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:100)
-# # exactly 5 elements sampled, which may not be distinct
-# takeSample(rdd, TRUE, 5L, 1618L)
-# # exactly 5 distinct elements sampled
-# takeSample(rdd, FALSE, 5L, 16181618L)
-#}
-# @rdname takeSample
-# @aliases takeSample,RDD
+#' Return a list of the elements that are a sampled subset of the given RDD.
+#'
+#' @param x The RDD to sample elements from
+#' @param withReplacement Sampling with replacement or not
+#' @param num Number of elements to return
+#' @param seed Randomness seed value
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:100)
+#' # exactly 5 elements sampled, which may not be distinct
+#' takeSample(rdd, TRUE, 5L, 1618L)
+#' # exactly 5 distinct elements sampled
+#' takeSample(rdd, FALSE, 5L, 16181618L)
+#'}
+#' @rdname takeSample
+#' @aliases takeSample,RDD
+#' @noRd
 setMethod("takeSample", signature(x = "RDD", withReplacement = "logical",
                                   num = "integer", seed = "integer"),
           function(x, withReplacement, num, seed) {
@@ -931,18 +958,19 @@ setMethod("takeSample", signature(x = "RDD", withReplacement = "logical",
             base::sample(samples)[1:total]
           })
 
-# Creates tuples of the elements in this RDD by applying a function.
-#
-# @param x The RDD.
-# @param func The function to be applied.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1, 2, 3))
-# collect(keyBy(rdd, function(x) { x*x })) # list(list(1, 1), list(4, 2), list(9, 3))
-#}
-# @rdname keyBy
-# @aliases keyBy,RDD
+#' Creates tuples of the elements in this RDD by applying a function.
+#'
+#' @param x The RDD.
+#' @param func The function to be applied.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1, 2, 3))
+#' collect(keyBy(rdd, function(x) { x*x })) # list(list(1, 1), list(4, 2), list(9, 3))
+#'}
+#' @rdname keyBy
+#' @aliases keyBy,RDD
+#' @noRd
 setMethod("keyBy",
           signature(x = "RDD", func = "function"),
           function(x, func) {
@@ -952,44 +980,46 @@ setMethod("keyBy",
             lapply(x, apply.func)
           })
 
-# Return a new RDD that has exactly numPartitions partitions.
-# Can increase or decrease the level of parallelism in this RDD. Internally,
-# this uses a shuffle to redistribute data.
-# If you are decreasing the number of partitions in this RDD, consider using
-# coalesce, which can avoid performing a shuffle.
-#
-# @param x The RDD.
-# @param numPartitions Number of partitions to create.
-# @seealso coalesce
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1, 2, 3, 4, 5, 6, 7), 4L)
-# numPartitions(rdd)                   # 4
-# numPartitions(repartition(rdd, 2L))  # 2
-#}
-# @rdname repartition
-# @aliases repartition,RDD
+#' Return a new RDD that has exactly numPartitions partitions.
+#' Can increase or decrease the level of parallelism in this RDD. Internally,
+#' this uses a shuffle to redistribute data.
+#' If you are decreasing the number of partitions in this RDD, consider using
+#' coalesce, which can avoid performing a shuffle.
+#'
+#' @param x The RDD.
+#' @param numPartitions Number of partitions to create.
+#' @seealso coalesce
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1, 2, 3, 4, 5, 6, 7), 4L)
+#' numPartitions(rdd)                   # 4
+#' numPartitions(repartition(rdd, 2L))  # 2
+#'}
+#' @rdname repartition
+#' @aliases repartition,RDD
+#' @noRd
 setMethod("repartition",
           signature(x = "RDD", numPartitions = "numeric"),
           function(x, numPartitions) {
             coalesce(x, numPartitions, TRUE)
           })
 
-# Return a new RDD that is reduced into numPartitions partitions.
-#
-# @param x The RDD.
-# @param numPartitions Number of partitions to create.
-# @seealso repartition
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1, 2, 3, 4, 5), 3L)
-# numPartitions(rdd)               # 3
-# numPartitions(coalesce(rdd, 1L)) # 1
-#}
-# @rdname coalesce
-# @aliases coalesce,RDD
+#' Return a new RDD that is reduced into numPartitions partitions.
+#'
+#' @param x The RDD.
+#' @param numPartitions Number of partitions to create.
+#' @seealso repartition
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1, 2, 3, 4, 5), 3L)
+#' numPartitions(rdd)               # 3
+#' numPartitions(coalesce(rdd, 1L)) # 1
+#'}
+#' @rdname coalesce
+#' @aliases coalesce,RDD
+#' @noRd
 setMethod("coalesce",
            signature(x = "RDD", numPartitions = "numeric"),
            function(x, numPartitions, shuffle = FALSE) {
@@ -1013,19 +1043,20 @@ setMethod("coalesce",
              }
            })
 
-# Save this RDD as a SequenceFile of serialized objects.
-#
-# @param x The RDD to save
-# @param path The directory where the file is saved
-# @seealso objectFile
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:3)
-# saveAsObjectFile(rdd, "/tmp/sparkR-tmp")
-#}
-# @rdname saveAsObjectFile
-# @aliases saveAsObjectFile,RDD
+#' Save this RDD as a SequenceFile of serialized objects.
+#'
+#' @param x The RDD to save
+#' @param path The directory where the file is saved
+#' @seealso objectFile
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:3)
+#' saveAsObjectFile(rdd, "/tmp/sparkR-tmp")
+#'}
+#' @rdname saveAsObjectFile
+#' @aliases saveAsObjectFile,RDD
+#' @noRd
 setMethod("saveAsObjectFile",
           signature(x = "RDD", path = "character"),
           function(x, path) {
@@ -1038,18 +1069,19 @@ setMethod("saveAsObjectFile",
             invisible(callJMethod(getJRDD(x), "saveAsObjectFile", path))
           })
 
-# Save this RDD as a text file, using string representations of elements.
-#
-# @param x The RDD to save
-# @param path The directory where the partitions of the text file are saved
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:3)
-# saveAsTextFile(rdd, "/tmp/sparkR-tmp")
-#}
-# @rdname saveAsTextFile
-# @aliases saveAsTextFile,RDD
+#' Save this RDD as a text file, using string representations of elements.
+#'
+#' @param x The RDD to save
+#' @param path The directory where the partitions of the text file are saved
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:3)
+#' saveAsTextFile(rdd, "/tmp/sparkR-tmp")
+#'}
+#' @rdname saveAsTextFile
+#' @aliases saveAsTextFile,RDD
+#' @noRd
 setMethod("saveAsTextFile",
           signature(x = "RDD", path = "character"),
           function(x, path) {
@@ -1062,21 +1094,22 @@ setMethod("saveAsTextFile",
               callJMethod(getJRDD(stringRdd, serializedMode = "string"), "saveAsTextFile", path))
           })
 
-# Sort an RDD by the given key function.
-#
-# @param x An RDD to be sorted.
-# @param func A function used to compute the sort key for each element.
-# @param ascending A flag to indicate whether the sorting is ascending or descending.
-# @param numPartitions Number of partitions to create.
-# @return An RDD where all elements are sorted.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(3, 2, 1))
-# collect(sortBy(rdd, function(x) { x })) # list (1, 2, 3)
-#}
-# @rdname sortBy
-# @aliases sortBy,RDD,RDD-method
+#' Sort an RDD by the given key function.
+#'
+#' @param x An RDD to be sorted.
+#' @param func A function used to compute the sort key for each element.
+#' @param ascending A flag to indicate whether the sorting is ascending or descending.
+#' @param numPartitions Number of partitions to create.
+#' @return An RDD where all elements are sorted.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(3, 2, 1))
+#' collect(sortBy(rdd, function(x) { x })) # list (1, 2, 3)
+#'}
+#' @rdname sortBy
+#' @aliases sortBy,RDD,RDD-method
+#' @noRd
 setMethod("sortBy",
           signature(x = "RDD", func = "function"),
           function(x, func, ascending = TRUE, numPartitions = SparkR:::numPartitions(x)) {
@@ -1138,97 +1171,95 @@ takeOrderedElem <- function(x, num, ascending = TRUE) {
   resList
 }
 
-# Returns the first N elements from an RDD in ascending order.
-#
-# @param x An RDD.
-# @param num Number of elements to return.
-# @return The first N elements from the RDD in ascending order.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(10, 1, 2, 9, 3, 4, 5, 6, 7))
-# takeOrdered(rdd, 6L) # list(1, 2, 3, 4, 5, 6)
-#}
-# @rdname takeOrdered
-# @aliases takeOrdered,RDD,RDD-method
+#' Returns the first N elements from an RDD in ascending order.
+#'
+#' @param x An RDD.
+#' @param num Number of elements to return.
+#' @return The first N elements from the RDD in ascending order.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(10, 1, 2, 9, 3, 4, 5, 6, 7))
+#' takeOrdered(rdd, 6L) # list(1, 2, 3, 4, 5, 6)
+#'}
+#' @rdname takeOrdered
+#' @aliases takeOrdered,RDD,RDD-method
+#' @noRd
 setMethod("takeOrdered",
           signature(x = "RDD", num = "integer"),
           function(x, num) {
             takeOrderedElem(x, num)
           })
 
-# Returns the top N elements from an RDD.
-#
-# @param x An RDD.
-# @param num Number of elements to return.
-# @return The top N elements from the RDD.
-# @rdname top
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(10, 1, 2, 9, 3, 4, 5, 6, 7))
-# top(rdd, 6L) # list(10, 9, 7, 6, 5, 4)
-#}
-# @rdname top
-# @aliases top,RDD,RDD-method
+#' Returns the top N elements from an RDD.
+#'
+#' @param x An RDD.
+#' @param num Number of elements to return.
+#' @return The top N elements from the RDD.
+#' @rdname top
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(10, 1, 2, 9, 3, 4, 5, 6, 7))
+#' top(rdd, 6L) # list(10, 9, 7, 6, 5, 4)
+#'}
+#' @aliases top,RDD,RDD-method
+#' @noRd
 setMethod("top",
           signature(x = "RDD", num = "integer"),
           function(x, num) {
             takeOrderedElem(x, num, FALSE)
           })
 
-# Fold an RDD using a given associative function and a neutral "zero value".
-#
-# Aggregate the elements of each partition, and then the results for all the
-# partitions, using a given associative function and a neutral "zero value".
-#
-# @param x An RDD.
-# @param zeroValue A neutral "zero value".
-# @param op An associative function for the folding operation.
-# @return The folding result.
-# @rdname fold
-# @seealso reduce
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1, 2, 3, 4, 5))
-# fold(rdd, 0, "+") # 15
-#}
-# @rdname fold
-# @aliases fold,RDD,RDD-method
+#' Fold an RDD using a given associative function and a neutral "zero value".
+#'
+#' Aggregate the elements of each partition, and then the results for all the
+#' partitions, using a given associative function and a neutral "zero value".
+#'
+#' @param x An RDD.
+#' @param zeroValue A neutral "zero value".
+#' @param op An associative function for the folding operation.
+#' @return The folding result.
+#' @rdname fold
+#' @seealso reduce
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1, 2, 3, 4, 5))
+#' fold(rdd, 0, "+") # 15
+#'}
+#' @aliases fold,RDD,RDD-method
+#' @noRd
 setMethod("fold",
           signature(x = "RDD", zeroValue = "ANY", op = "ANY"),
           function(x, zeroValue, op) {
             aggregateRDD(x, zeroValue, op, op)
           })
 
-# Aggregate an RDD using the given combine functions and a neutral "zero value".
-#
-# Aggregate the elements of each partition, and then the results for all the
-# partitions, using given combine functions and a neutral "zero value".
-#
-# @param x An RDD.
-# @param zeroValue A neutral "zero value".
-# @param seqOp A function to aggregate the RDD elements. It may return a different
-#              result type from the type of the RDD elements.
-# @param combOp A function to aggregate results of seqOp.
-# @return The aggregation result.
-# @rdname aggregateRDD
-# @seealso reduce
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1, 2, 3, 4))
-# zeroValue <- list(0, 0)
-# seqOp <- function(x, y) { list(x[[1]] + y, x[[2]] + 1) }
-# combOp <- function(x, y) { list(x[[1]] + y[[1]], x[[2]] + y[[2]]) }
-# aggregateRDD(rdd, zeroValue, seqOp, combOp) # list(10, 4)
-#}
-# @rdname aggregateRDD
-# @aliases aggregateRDD,RDD,RDD-method
+#' Aggregate an RDD using the given combine functions and a neutral "zero value".
+#'
+#' Aggregate the elements of each partition, and then the results for all the
+#' partitions, using given combine functions and a neutral "zero value".
+#'
+#' @param x An RDD.
+#' @param zeroValue A neutral "zero value".
+#' @param seqOp A function to aggregate the RDD elements. It may return a different
+#'              result type from the type of the RDD elements.
+#' @param combOp A function to aggregate results of seqOp.
+#' @return The aggregation result.
+#' @rdname aggregateRDD
+#' @seealso reduce
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1, 2, 3, 4))
+#' zeroValue <- list(0, 0)
+#' seqOp <- function(x, y) { list(x[[1]] + y, x[[2]] + 1) }
+#' combOp <- function(x, y) { list(x[[1]] + y[[1]], x[[2]] + y[[2]]) }
+#' aggregateRDD(rdd, zeroValue, seqOp, combOp) # list(10, 4)
+#'}
+#' @aliases aggregateRDD,RDD,RDD-method
+#' @noRd
 setMethod("aggregateRDD",
           signature(x = "RDD", zeroValue = "ANY", seqOp = "ANY", combOp = "ANY"),
           function(x, zeroValue, seqOp, combOp) {
@@ -1241,25 +1272,24 @@ setMethod("aggregateRDD",
             Reduce(combOp, partitionList, zeroValue)
           })
 
-# Pipes elements to a forked external process.
-#
-# The same as 'pipe()' in Spark.
-#
-# @param x The RDD whose elements are piped to the forked external process.
-# @param command The command to fork an external process.
-# @param env A named list to set environment variables of the external process.
-# @return A new RDD created by piping all elements to a forked external process.
-# @rdname pipeRDD
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# collect(pipeRDD(rdd, "more")
-# Output: c("1", "2", ..., "10")
-#}
-# @rdname pipeRDD
-# @aliases pipeRDD,RDD,character-method
+#' Pipes elements to a forked external process.
+#'
+#' The same as 'pipe()' in Spark.
+#'
+#' @param x The RDD whose elements are piped to the forked external process.
+#' @param command The command to fork an external process.
+#' @param env A named list to set environment variables of the external process.
+#' @return A new RDD created by piping all elements to a forked external process.
+#' @rdname pipeRDD
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' collect(pipeRDD(rdd, "more")
+#' Output: c("1", "2", ..., "10")
+#'}
+#' @aliases pipeRDD,RDD,character-method
+#' @noRd
 setMethod("pipeRDD",
           signature(x = "RDD", command = "character"),
           function(x, command, env = list()) {
@@ -1274,42 +1304,40 @@ setMethod("pipeRDD",
             lapplyPartition(x, func)
           })
 
-# TODO: Consider caching the name in the RDD's environment
-# Return an RDD's name.
-#
-# @param x The RDD whose name is returned.
-# @rdname name
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1,2,3))
-# name(rdd) # NULL (if not set before)
-#}
-# @rdname name
-# @aliases name,RDD
+#' TODO: Consider caching the name in the RDD's environment
+#' Return an RDD's name.
+#'
+#' @param x The RDD whose name is returned.
+#' @rdname name
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1,2,3))
+#' name(rdd) # NULL (if not set before)
+#'}
+#' @aliases name,RDD
+#' @noRd
 setMethod("name",
           signature(x = "RDD"),
           function(x) {
             callJMethod(getJRDD(x), "name")
           })
 
-# Set an RDD's name.
-#
-# @param x The RDD whose name is to be set.
-# @param name The RDD name to be set.
-# @return a new RDD renamed.
-# @rdname setName
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(1,2,3))
-# setName(rdd, "myRDD")
-# name(rdd) # "myRDD"
-#}
-# @rdname setName
-# @aliases setName,RDD
+#' Set an RDD's name.
+#'
+#' @param x The RDD whose name is to be set.
+#' @param name The RDD name to be set.
+#' @return a new RDD renamed.
+#' @rdname setName
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(1,2,3))
+#' setName(rdd, "myRDD")
+#' name(rdd) # "myRDD"
+#'}
+#' @aliases setName,RDD
+#' @noRd
 setMethod("setName",
           signature(x = "RDD", name = "character"),
           function(x, name) {
@@ -1317,25 +1345,26 @@ setMethod("setName",
             x
           })
 
-# Zip an RDD with generated unique Long IDs.
-#
-# Items in the kth partition will get ids k, n+k, 2*n+k, ..., where
-# n is the number of partitions. So there may exist gaps, but this
-# method won't trigger a spark job, which is different from
-# zipWithIndex.
-#
-# @param x An RDD to be zipped.
-# @return An RDD with zipped items.
-# @seealso zipWithIndex
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list("a", "b", "c", "d", "e"), 3L)
-# collect(zipWithUniqueId(rdd))
-# # list(list("a", 0), list("b", 3), list("c", 1), list("d", 4), list("e", 2))
-#}
-# @rdname zipWithUniqueId
-# @aliases zipWithUniqueId,RDD
+#' Zip an RDD with generated unique Long IDs.
+#'
+#' Items in the kth partition will get ids k, n+k, 2*n+k, ..., where
+#' n is the number of partitions. So there may exist gaps, but this
+#' method won't trigger a spark job, which is different from
+#' zipWithIndex.
+#'
+#' @param x An RDD to be zipped.
+#' @return An RDD with zipped items.
+#' @seealso zipWithIndex
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list("a", "b", "c", "d", "e"), 3L)
+#' collect(zipWithUniqueId(rdd))
+#' # list(list("a", 0), list("b", 3), list("c", 1), list("d", 4), list("e", 2))
+#'}
+#' @rdname zipWithUniqueId
+#' @aliases zipWithUniqueId,RDD
+#' @noRd
 setMethod("zipWithUniqueId",
           signature(x = "RDD"),
           function(x) {
@@ -1354,28 +1383,29 @@ setMethod("zipWithUniqueId",
             lapplyPartitionsWithIndex(x, partitionFunc)
           })
 
-# Zip an RDD with its element indices.
-#
-# The ordering is first based on the partition index and then the
-# ordering of items within each partition. So the first item in
-# the first partition gets index 0, and the last item in the last
-# partition receives the largest index.
-#
-# This method needs to trigger a Spark job when this RDD contains
-# more than one partition.
-#
-# @param x An RDD to be zipped.
-# @return An RDD with zipped items.
-# @seealso zipWithUniqueId
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list("a", "b", "c", "d", "e"), 3L)
-# collect(zipWithIndex(rdd))
-# # list(list("a", 0), list("b", 1), list("c", 2), list("d", 3), list("e", 4))
-#}
-# @rdname zipWithIndex
-# @aliases zipWithIndex,RDD
+#' Zip an RDD with its element indices.
+#'
+#' The ordering is first based on the partition index and then the
+#' ordering of items within each partition. So the first item in
+#' the first partition gets index 0, and the last item in the last
+#' partition receives the largest index.
+#'
+#' This method needs to trigger a Spark job when this RDD contains
+#' more than one partition.
+#'
+#' @param x An RDD to be zipped.
+#' @return An RDD with zipped items.
+#' @seealso zipWithUniqueId
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list("a", "b", "c", "d", "e"), 3L)
+#' collect(zipWithIndex(rdd))
+#' # list(list("a", 0), list("b", 1), list("c", 2), list("d", 3), list("e", 4))
+#'}
+#' @rdname zipWithIndex
+#' @aliases zipWithIndex,RDD
+#' @noRd
 setMethod("zipWithIndex",
           signature(x = "RDD"),
           function(x) {
@@ -1407,20 +1437,21 @@ setMethod("zipWithIndex",
            lapplyPartitionsWithIndex(x, partitionFunc)
          })
 
-# Coalesce all elements within each partition of an RDD into a list.
-#
-# @param x An RDD.
-# @return An RDD created by coalescing all elements within
-#         each partition into a list.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, as.list(1:4), 2L)
-# collect(glom(rdd))
-# # list(list(1, 2), list(3, 4))
-#}
-# @rdname glom
-# @aliases glom,RDD
+#' Coalesce all elements within each partition of an RDD into a list.
+#'
+#' @param x An RDD.
+#' @return An RDD created by coalescing all elements within
+#'         each partition into a list.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, as.list(1:4), 2L)
+#' collect(glom(rdd))
+#' # list(list(1, 2), list(3, 4))
+#'}
+#' @rdname glom
+#' @aliases glom,RDD
+#' @noRd
 setMethod("glom",
           signature(x = "RDD"),
           function(x) {
@@ -1433,21 +1464,22 @@ setMethod("glom",
 
 ############ Binary Functions #############
 
-# Return the union RDD of two RDDs.
-# The same as union() in Spark.
-#
-# @param x An RDD.
-# @param y An RDD.
-# @return a new RDD created by performing the simple union (witout removing
-# duplicates) of two input RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:3)
-# unionRDD(rdd, rdd) # 1, 2, 3, 1, 2, 3
-#}
-# @rdname unionRDD
-# @aliases unionRDD,RDD,RDD-method
+#' Return the union RDD of two RDDs.
+#' The same as union() in Spark.
+#'
+#' @param x An RDD.
+#' @param y An RDD.
+#' @return a new RDD created by performing the simple union (witout removing
+#' duplicates) of two input RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:3)
+#' unionRDD(rdd, rdd) # 1, 2, 3, 1, 2, 3
+#'}
+#' @rdname unionRDD
+#' @aliases unionRDD,RDD,RDD-method
+#' @noRd
 setMethod("unionRDD",
           signature(x = "RDD", y = "RDD"),
           function(x, y) {
@@ -1464,27 +1496,28 @@ setMethod("unionRDD",
             union.rdd
           })
 
-# Zip an RDD with another RDD.
-#
-# Zips this RDD with another one, returning key-value pairs with the
-# first element in each RDD second element in each RDD, etc. Assumes
-# that the two RDDs have the same number of partitions and the same
-# number of elements in each partition (e.g. one was made through
-# a map on the other).
-#
-# @param x An RDD to be zipped.
-# @param other Another RDD to be zipped.
-# @return An RDD zipped from the two RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, 0:4)
-# rdd2 <- parallelize(sc, 1000:1004)
-# collect(zipRDD(rdd1, rdd2))
-# # list(list(0, 1000), list(1, 1001), list(2, 1002), list(3, 1003), list(4, 1004))
-#}
-# @rdname zipRDD
-# @aliases zipRDD,RDD
+#' Zip an RDD with another RDD.
+#'
+#' Zips this RDD with another one, returning key-value pairs with the
+#' first element in each RDD second element in each RDD, etc. Assumes
+#' that the two RDDs have the same number of partitions and the same
+#' number of elements in each partition (e.g. one was made through
+#' a map on the other).
+#'
+#' @param x An RDD to be zipped.
+#' @param other Another RDD to be zipped.
+#' @return An RDD zipped from the two RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, 0:4)
+#' rdd2 <- parallelize(sc, 1000:1004)
+#' collect(zipRDD(rdd1, rdd2))
+#' # list(list(0, 1000), list(1, 1001), list(2, 1002), list(3, 1003), list(4, 1004))
+#'}
+#' @rdname zipRDD
+#' @aliases zipRDD,RDD
+#' @noRd
 setMethod("zipRDD",
           signature(x = "RDD", other = "RDD"),
           function(x, other) {
@@ -1503,24 +1536,25 @@ setMethod("zipRDD",
             mergePartitions(rdd, TRUE)
           })
 
-# Cartesian product of this RDD and another one.
-#
-# Return the Cartesian product of this RDD and another one,
-# that is, the RDD of all pairs of elements (a, b) where a
-# is in this and b is in other.
-#
-# @param x An RDD.
-# @param other An RDD.
-# @return A new RDD which is the Cartesian product of these two RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:2)
-# sortByKey(cartesian(rdd, rdd))
-# # list(list(1, 1), list(1, 2), list(2, 1), list(2, 2))
-#}
-# @rdname cartesian
-# @aliases cartesian,RDD,RDD-method
+#' Cartesian product of this RDD and another one.
+#'
+#' Return the Cartesian product of this RDD and another one,
+#' that is, the RDD of all pairs of elements (a, b) where a
+#' is in this and b is in other.
+#'
+#' @param x An RDD.
+#' @param other An RDD.
+#' @return A new RDD which is the Cartesian product of these two RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:2)
+#' sortByKey(cartesian(rdd, rdd))
+#' # list(list(1, 1), list(1, 2), list(2, 1), list(2, 2))
+#'}
+#' @rdname cartesian
+#' @aliases cartesian,RDD,RDD-method
+#' @noRd
 setMethod("cartesian",
           signature(x = "RDD", other = "RDD"),
           function(x, other) {
@@ -1533,24 +1567,25 @@ setMethod("cartesian",
             mergePartitions(rdd, FALSE)
           })
 
-# Subtract an RDD with another RDD.
-#
-# Return an RDD with the elements from this that are not in other.
-#
-# @param x An RDD.
-# @param other An RDD.
-# @param numPartitions Number of the partitions in the result RDD.
-# @return An RDD with the elements from this that are not in other.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(1, 1, 2, 2, 3, 4))
-# rdd2 <- parallelize(sc, list(2, 4))
-# collect(subtract(rdd1, rdd2))
-# # list(1, 1, 3)
-#}
-# @rdname subtract
-# @aliases subtract,RDD
+#' Subtract an RDD with another RDD.
+#'
+#' Return an RDD with the elements from this that are not in other.
+#'
+#' @param x An RDD.
+#' @param other An RDD.
+#' @param numPartitions Number of the partitions in the result RDD.
+#' @return An RDD with the elements from this that are not in other.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(1, 1, 2, 2, 3, 4))
+#' rdd2 <- parallelize(sc, list(2, 4))
+#' collect(subtract(rdd1, rdd2))
+#' # list(1, 1, 3)
+#'}
+#' @rdname subtract
+#' @aliases subtract,RDD
+#' @noRd
 setMethod("subtract",
           signature(x = "RDD", other = "RDD"),
           function(x, other, numPartitions = SparkR:::numPartitions(x)) {
@@ -1560,28 +1595,29 @@ setMethod("subtract",
             keys(subtractByKey(rdd1, rdd2, numPartitions))
           })
 
-# Intersection of this RDD and another one.
-#
-# Return the intersection of this RDD and another one.
-# The output will not contain any duplicate elements,
-# even if the input RDDs did. Performs a hash partition
-# across the cluster.
-# Note that this method performs a shuffle internally.
-#
-# @param x An RDD.
-# @param other An RDD.
-# @param numPartitions The number of partitions in the result RDD.
-# @return An RDD which is the intersection of these two RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(1, 10, 2, 3, 4, 5))
-# rdd2 <- parallelize(sc, list(1, 6, 2, 3, 7, 8))
-# collect(sortBy(intersection(rdd1, rdd2), function(x) { x }))
-# # list(1, 2, 3)
-#}
-# @rdname intersection
-# @aliases intersection,RDD
+#' Intersection of this RDD and another one.
+#'
+#' Return the intersection of this RDD and another one.
+#' The output will not contain any duplicate elements,
+#' even if the input RDDs did. Performs a hash partition
+#' across the cluster.
+#' Note that this method performs a shuffle internally.
+#'
+#' @param x An RDD.
+#' @param other An RDD.
+#' @param numPartitions The number of partitions in the result RDD.
+#' @return An RDD which is the intersection of these two RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(1, 10, 2, 3, 4, 5))
+#' rdd2 <- parallelize(sc, list(1, 6, 2, 3, 7, 8))
+#' collect(sortBy(intersection(rdd1, rdd2), function(x) { x }))
+#' # list(1, 2, 3)
+#'}
+#' @rdname intersection
+#' @aliases intersection,RDD
+#' @noRd
 setMethod("intersection",
           signature(x = "RDD", other = "RDD"),
           function(x, other, numPartitions = SparkR:::numPartitions(x)) {
@@ -1597,26 +1633,27 @@ setMethod("intersection",
             keys(filterRDD(cogroup(rdd1, rdd2, numPartitions = numPartitions), filterFunction))
           })
 
-# Zips an RDD's partitions with one (or more) RDD(s).
-# Same as zipPartitions in Spark.
-#
-# @param ... RDDs to be zipped.
-# @param func A function to transform zipped partitions.
-# @return A new RDD by applying a function to the zipped partitions.
-#         Assumes that all the RDDs have the *same number of partitions*, but
-#         does *not* require them to have the same number of elements in each partition.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, 1:2, 2L)  # 1, 2
-# rdd2 <- parallelize(sc, 1:4, 2L)  # 1:2, 3:4
-# rdd3 <- parallelize(sc, 1:6, 2L)  # 1:3, 4:6
-# collect(zipPartitions(rdd1, rdd2, rdd3,
-#                       func = function(x, y, z) { list(list(x, y, z))} ))
-# # list(list(1, c(1,2), c(1,2,3)), list(2, c(3,4), c(4,5,6)))
-#}
-# @rdname zipRDD
-# @aliases zipPartitions,RDD
+#' Zips an RDD's partitions with one (or more) RDD(s).
+#' Same as zipPartitions in Spark.
+#'
+#' @param ... RDDs to be zipped.
+#' @param func A function to transform zipped partitions.
+#' @return A new RDD by applying a function to the zipped partitions.
+#'         Assumes that all the RDDs have the *same number of partitions*, but
+#'         does *not* require them to have the same number of elements in each partition.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, 1:2, 2L)  # 1, 2
+#' rdd2 <- parallelize(sc, 1:4, 2L)  # 1:2, 3:4
+#' rdd3 <- parallelize(sc, 1:6, 2L)  # 1:3, 4:6
+#' collect(zipPartitions(rdd1, rdd2, rdd3,
+#'                       func = function(x, y, z) { list(list(x, y, z))} ))
+#' # list(list(1, c(1,2), c(1,2,3)), list(2, c(3,4), c(4,5,6)))
+#'}
+#' @rdname zipRDD
+#' @aliases zipPartitions,RDD
+#' @noRd
 setMethod("zipPartitions",
           "RDD",
           function(..., func) {
diff --git a/R/pkg/R/SQLContext.R b/R/pkg/R/SQLContext.R
index 1bf025cce437..fd013fdb304d 100644
--- a/R/pkg/R/SQLContext.R
+++ b/R/pkg/R/SQLContext.R
@@ -144,7 +144,6 @@ createDataFrame <- function(sqlContext, data, schema = NULL, samplingRatio = 1.0
   }
 
   stopifnot(class(schema) == "structType")
-  # schemaString <- tojson(schema)
 
   jrdd <- getJRDD(lapply(rdd, function(x) x), "row")
   srdd <- callJMethod(jrdd, "rdd")
@@ -160,22 +159,21 @@ as.DataFrame <- function(sqlContext, data, schema = NULL, samplingRatio = 1.0) {
   createDataFrame(sqlContext, data, schema, samplingRatio)
 }
 
-# toDF
-#
-# Converts an RDD to a DataFrame by infer the types.
-#
-# @param x An RDD
-#
-# @rdname DataFrame
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# sqlContext <- sparkRSQL.init(sc)
-# rdd <- lapply(parallelize(sc, 1:10), function(x) list(a=x, b=as.character(x)))
-# df <- toDF(rdd)
-# }
-
+#' toDF
+#'
+#' Converts an RDD to a DataFrame by infer the types.
+#'
+#' @param x An RDD
+#'
+#' @rdname DataFrame
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' rdd <- lapply(parallelize(sc, 1:10), function(x) list(a=x, b=as.character(x)))
+#' df <- toDF(rdd)
+#'}
 setGeneric("toDF", function(x, ...) { standardGeneric("toDF") })
 
 setMethod("toDF", signature(x = "RDD"),
@@ -217,23 +215,23 @@ jsonFile <- function(sqlContext, path) {
 }
 
 
-# JSON RDD
-#
-# Loads an RDD storing one JSON object per string as a DataFrame.
-#
-# @param sqlContext SQLContext to use
-# @param rdd An RDD of JSON string
-# @param schema A StructType object to use as schema
-# @param samplingRatio The ratio of simpling used to infer the schema
-# @return A DataFrame
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# sqlContext <- sparkRSQL.init(sc)
-# rdd <- texFile(sc, "path/to/json")
-# df <- jsonRDD(sqlContext, rdd)
-# }
+#' JSON RDD
+#'
+#' Loads an RDD storing one JSON object per string as a DataFrame.
+#'
+#' @param sqlContext SQLContext to use
+#' @param rdd An RDD of JSON string
+#' @param schema A StructType object to use as schema
+#' @param samplingRatio The ratio of simpling used to infer the schema
+#' @return A DataFrame
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' sqlContext <- sparkRSQL.init(sc)
+#' rdd <- texFile(sc, "path/to/json")
+#' df <- jsonRDD(sqlContext, rdd)
+#'}
 
 # TODO: support schema
 jsonRDD <- function(sqlContext, rdd, schema = NULL, samplingRatio = 1.0) {
diff --git a/R/pkg/R/context.R b/R/pkg/R/context.R
index 720990e1c608..471bec1eacf0 100644
--- a/R/pkg/R/context.R
+++ b/R/pkg/R/context.R
@@ -25,23 +25,23 @@ getMinPartitions <- function(sc, minPartitions) {
   as.integer(minPartitions)
 }
 
-# Create an RDD from a text file.
-#
-# This function reads a text file from HDFS, a local file system (available on all
-# nodes), or any Hadoop-supported file system URI, and creates an
-# RDD of strings from it.
-#
-# @param sc SparkContext to use
-# @param path Path of file to read. A vector of multiple paths is allowed.
-# @param minPartitions Minimum number of partitions to be created. If NULL, the default
-#  value is chosen based on available parallelism.
-# @return RDD where each item is of type \code{character}
-# @export
-# @examples
-#\dontrun{
-#  sc <- sparkR.init()
-#  lines <- textFile(sc, "myfile.txt")
-#}
+#' Create an RDD from a text file.
+#'
+#' This function reads a text file from HDFS, a local file system (available on all
+#' nodes), or any Hadoop-supported file system URI, and creates an
+#' RDD of strings from it.
+#'
+#' @param sc SparkContext to use
+#' @param path Path of file to read. A vector of multiple paths is allowed.
+#' @param minPartitions Minimum number of partitions to be created. If NULL, the default
+#'  value is chosen based on available parallelism.
+#' @return RDD where each item is of type \code{character}
+#' @noRd
+#' @examples
+#'\dontrun{
+#'  sc <- sparkR.init()
+#'  lines <- textFile(sc, "myfile.txt")
+#'}
 textFile <- function(sc, path, minPartitions = NULL) {
   # Allow the user to have a more flexible definiton of the text file path
   path <- suppressWarnings(normalizePath(path))
@@ -53,23 +53,23 @@ textFile <- function(sc, path, minPartitions = NULL) {
   RDD(jrdd, "string")
 }
 
-# Load an RDD saved as a SequenceFile containing serialized objects.
-#
-# The file to be loaded should be one that was previously generated by calling
-# saveAsObjectFile() of the RDD class.
-#
-# @param sc SparkContext to use
-# @param path Path of file to read. A vector of multiple paths is allowed.
-# @param minPartitions Minimum number of partitions to be created. If NULL, the default
-#  value is chosen based on available parallelism.
-# @return RDD containing serialized R objects.
-# @seealso saveAsObjectFile
-# @export
-# @examples
-#\dontrun{
-#  sc <- sparkR.init()
-#  rdd <- objectFile(sc, "myfile")
-#}
+#' Load an RDD saved as a SequenceFile containing serialized objects.
+#'
+#' The file to be loaded should be one that was previously generated by calling
+#' saveAsObjectFile() of the RDD class.
+#'
+#' @param sc SparkContext to use
+#' @param path Path of file to read. A vector of multiple paths is allowed.
+#' @param minPartitions Minimum number of partitions to be created. If NULL, the default
+#'  value is chosen based on available parallelism.
+#' @return RDD containing serialized R objects.
+#' @seealso saveAsObjectFile
+#' @noRd
+#' @examples
+#'\dontrun{
+#'  sc <- sparkR.init()
+#'  rdd <- objectFile(sc, "myfile")
+#'}
 objectFile <- function(sc, path, minPartitions = NULL) {
   # Allow the user to have a more flexible definiton of the text file path
   path <- suppressWarnings(normalizePath(path))
@@ -81,24 +81,24 @@ objectFile <- function(sc, path, minPartitions = NULL) {
   RDD(jrdd, "byte")
 }
 
-# Create an RDD from a homogeneous list or vector.
-#
-# This function creates an RDD from a local homogeneous list in R. The elements
-# in the list are split into \code{numSlices} slices and distributed to nodes
-# in the cluster.
-#
-# @param sc SparkContext to use
-# @param coll collection to parallelize
-# @param numSlices number of partitions to create in the RDD
-# @return an RDD created from this collection
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10, 2)
-# # The RDD should contain 10 elements
-# length(rdd)
-#}
+#' Create an RDD from a homogeneous list or vector.
+#'
+#' This function creates an RDD from a local homogeneous list in R. The elements
+#' in the list are split into \code{numSlices} slices and distributed to nodes
+#' in the cluster.
+#'
+#' @param sc SparkContext to use
+#' @param coll collection to parallelize
+#' @param numSlices number of partitions to create in the RDD
+#' @return an RDD created from this collection
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10, 2)
+#' # The RDD should contain 10 elements
+#' length(rdd)
+#'}
 parallelize <- function(sc, coll, numSlices = 1) {
   # TODO: bound/safeguard numSlices
   # TODO: unit tests for if the split works for all primitives
@@ -133,33 +133,32 @@ parallelize <- function(sc, coll, numSlices = 1) {
   RDD(jrdd, "byte")
 }
 
-# Include this specified package on all workers
-#
-# This function can be used to include a package on all workers before the
-# user's code is executed. This is useful in scenarios where other R package
-# functions are used in a function passed to functions like \code{lapply}.
-# NOTE: The package is assumed to be installed on every node in the Spark
-# cluster.
-#
-# @param sc SparkContext to use
-# @param pkg Package name
-#
-# @export
-# @examples
-#\dontrun{
-#  library(Matrix)
-#
-#  sc <- sparkR.init()
-#  # Include the matrix library we will be using
-#  includePackage(sc, Matrix)
-#
-#  generateSparse <- function(x) {
-#    sparseMatrix(i=c(1, 2, 3), j=c(1, 2, 3), x=c(1, 2, 3))
-#  }
-#
-#  rdd <- lapplyPartition(parallelize(sc, 1:2, 2L), generateSparse)
-#  collect(rdd)
-#}
+#' Include this specified package on all workers
+#'
+#' This function can be used to include a package on all workers before the
+#' user's code is executed. This is useful in scenarios where other R package
+#' functions are used in a function passed to functions like \code{lapply}.
+#' NOTE: The package is assumed to be installed on every node in the Spark
+#' cluster.
+#'
+#' @param sc SparkContext to use
+#' @param pkg Package name
+#' @noRd
+#' @examples
+#'\dontrun{
+#'  library(Matrix)
+#'
+#'  sc <- sparkR.init()
+#'  # Include the matrix library we will be using
+#'  includePackage(sc, Matrix)
+#'
+#'  generateSparse <- function(x) {
+#'    sparseMatrix(i=c(1, 2, 3), j=c(1, 2, 3), x=c(1, 2, 3))
+#'  }
+#'
+#'  rdd <- lapplyPartition(parallelize(sc, 1:2, 2L), generateSparse)
+#'  collect(rdd)
+#'}
 includePackage <- function(sc, pkg) {
   pkg <- as.character(substitute(pkg))
   if (exists(".packages", .sparkREnv)) {
@@ -171,30 +170,30 @@ includePackage <- function(sc, pkg) {
   .sparkREnv$.packages <- packages
 }
 
-# @title Broadcast a variable to all workers
-#
-# @description
-# Broadcast a read-only variable to the cluster, returning a \code{Broadcast}
-# object for reading it in distributed functions.
-#
-# @param sc Spark Context to use
-# @param object Object to be broadcast
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:2, 2L)
-#
-# # Large Matrix object that we want to broadcast
-# randomMat <- matrix(nrow=100, ncol=10, data=rnorm(1000))
-# randomMatBr <- broadcast(sc, randomMat)
-#
-# # Use the broadcast variable inside the function
-# useBroadcast <- function(x) {
-#   sum(value(randomMatBr) * x)
-# }
-# sumRDD <- lapply(rdd, useBroadcast)
-#}
+#' @title Broadcast a variable to all workers
+#'
+#' @description
+#' Broadcast a read-only variable to the cluster, returning a \code{Broadcast}
+#' object for reading it in distributed functions.
+#'
+#' @param sc Spark Context to use
+#' @param object Object to be broadcast
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:2, 2L)
+#'
+#' # Large Matrix object that we want to broadcast
+#' randomMat <- matrix(nrow=100, ncol=10, data=rnorm(1000))
+#' randomMatBr <- broadcast(sc, randomMat)
+#'
+#' # Use the broadcast variable inside the function
+#' useBroadcast <- function(x) {
+#'   sum(value(randomMatBr) * x)
+#' }
+#' sumRDD <- lapply(rdd, useBroadcast)
+#'}
 broadcast <- function(sc, object) {
   objName <- as.character(substitute(object))
   serializedObj <- serialize(object, connection = NULL)
@@ -205,21 +204,21 @@ broadcast <- function(sc, object) {
   Broadcast(id, object, jBroadcast, objName)
 }
 
-# @title Set the checkpoint directory
-#
-# Set the directory under which RDDs are going to be checkpointed. The
-# directory must be a HDFS path if running on a cluster.
-#
-# @param sc Spark Context to use
-# @param dirName Directory path
-# @export
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# setCheckpointDir(sc, "~/checkpoint")
-# rdd <- parallelize(sc, 1:2, 2L)
-# checkpoint(rdd)
-#}
+#' @title Set the checkpoint directory
+#'
+#' Set the directory under which RDDs are going to be checkpointed. The
+#' directory must be a HDFS path if running on a cluster.
+#'
+#' @param sc Spark Context to use
+#' @param dirName Directory path
+#' @noRd
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' setCheckpointDir(sc, "~/checkpoint")
+#' rdd <- parallelize(sc, 1:2, 2L)
+#' checkpoint(rdd)
+#'}
 setCheckpointDir <- function(sc, dirName) {
   invisible(callJMethod(sc, "setCheckpointDir", suppressWarnings(normalizePath(dirName))))
 }
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 92ad4ee8685e..612e639f8ad9 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -88,12 +88,8 @@ setGeneric("flatMap", function(X, FUN) { standardGeneric("flatMap") })
 # @export
 setGeneric("fold", function(x, zeroValue, op) { standardGeneric("fold") })
 
-# @rdname foreach
-# @export
 setGeneric("foreach", function(x, func) { standardGeneric("foreach") })
 
-# @rdname foreach
-# @export
 setGeneric("foreachPartition", function(x, func) { standardGeneric("foreachPartition") })
 
 # The jrdd accessor function.
@@ -107,27 +103,17 @@ setGeneric("glom", function(x) { standardGeneric("glom") })
 # @export
 setGeneric("keyBy", function(x, func) { standardGeneric("keyBy") })
 
-# @rdname lapplyPartition
-# @export
 setGeneric("lapplyPartition", function(X, FUN) { standardGeneric("lapplyPartition") })
 
-# @rdname lapplyPartitionsWithIndex
-# @export
 setGeneric("lapplyPartitionsWithIndex",
            function(X, FUN) {
              standardGeneric("lapplyPartitionsWithIndex")
            })
 
-# @rdname lapply
-# @export
 setGeneric("map", function(X, FUN) { standardGeneric("map") })
 
-# @rdname lapplyPartition
-# @export
 setGeneric("mapPartitions", function(X, FUN) { standardGeneric("mapPartitions") })
 
-# @rdname lapplyPartitionsWithIndex
-# @export
 setGeneric("mapPartitionsWithIndex",
            function(X, FUN) { standardGeneric("mapPartitionsWithIndex") })
 
@@ -563,12 +549,8 @@ setGeneric("summarize", function(x,...) { standardGeneric("summarize") })
 #' @export
 setGeneric("summary", function(object, ...) { standardGeneric("summary") })
 
-# @rdname tojson
-# @export
 setGeneric("toJSON", function(x) { standardGeneric("toJSON") })
 
-#' @rdname DataFrame
-#' @export
 setGeneric("toRDD", function(x) { standardGeneric("toRDD") })
 
 #' @rdname unionAll
diff --git a/R/pkg/R/pairRDD.R b/R/pkg/R/pairRDD.R
index 199c3fd6ab1b..991bea4d2022 100644
--- a/R/pkg/R/pairRDD.R
+++ b/R/pkg/R/pairRDD.R
@@ -21,23 +21,24 @@ NULL
 
 ############ Actions and Transformations ############
 
-# Look up elements of a key in an RDD
-#
-# @description
-# \code{lookup} returns a list of values in this RDD for key key.
-#
-# @param x The RDD to collect
-# @param key The key to look up for
-# @return a list of values in this RDD for key key
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(c(1, 1), c(2, 2), c(1, 3))
-# rdd <- parallelize(sc, pairs)
-# lookup(rdd, 1) # list(1, 3)
-#}
-# @rdname lookup
-# @aliases lookup,RDD-method
+#' Look up elements of a key in an RDD
+#'
+#' @description
+#' \code{lookup} returns a list of values in this RDD for key key.
+#'
+#' @param x The RDD to collect
+#' @param key The key to look up for
+#' @return a list of values in this RDD for key key
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(c(1, 1), c(2, 2), c(1, 3))
+#' rdd <- parallelize(sc, pairs)
+#' lookup(rdd, 1) # list(1, 3)
+#'}
+#' @rdname lookup
+#' @aliases lookup,RDD-method
+#' @noRd
 setMethod("lookup",
           signature(x = "RDD", key = "ANY"),
           function(x, key) {
@@ -49,21 +50,22 @@ setMethod("lookup",
             collect(valsRDD)
           })
 
-# Count the number of elements for each key, and return the result to the
-# master as lists of (key, count) pairs.
-#
-# Same as countByKey in Spark.
-#
-# @param x The RDD to count keys.
-# @return list of (key, count) pairs, where count is number of each key in rdd.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(c("a", 1), c("b", 1), c("a", 1)))
-# countByKey(rdd) # ("a", 2L), ("b", 1L)
-#}
-# @rdname countByKey
-# @aliases countByKey,RDD-method
+#' Count the number of elements for each key, and return the result to the
+#' master as lists of (key, count) pairs.
+#'
+#' Same as countByKey in Spark.
+#'
+#' @param x The RDD to count keys.
+#' @return list of (key, count) pairs, where count is number of each key in rdd.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(c("a", 1), c("b", 1), c("a", 1)))
+#' countByKey(rdd) # ("a", 2L), ("b", 1L)
+#'}
+#' @rdname countByKey
+#' @aliases countByKey,RDD-method
+#' @noRd
 setMethod("countByKey",
           signature(x = "RDD"),
           function(x) {
@@ -71,17 +73,18 @@ setMethod("countByKey",
             countByValue(keys)
           })
 
-# Return an RDD with the keys of each tuple.
-#
-# @param x The RDD from which the keys of each tuple is returned.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, 2), list(3, 4)))
-# collect(keys(rdd)) # list(1, 3)
-#}
-# @rdname keys
-# @aliases keys,RDD
+#' Return an RDD with the keys of each tuple.
+#'
+#' @param x The RDD from which the keys of each tuple is returned.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, 2), list(3, 4)))
+#' collect(keys(rdd)) # list(1, 3)
+#'}
+#' @rdname keys
+#' @aliases keys,RDD
+#' @noRd
 setMethod("keys",
           signature(x = "RDD"),
           function(x) {
@@ -91,17 +94,18 @@ setMethod("keys",
             lapply(x, func)
           })
 
-# Return an RDD with the values of each tuple.
-#
-# @param x The RDD from which the values of each tuple is returned.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, 2), list(3, 4)))
-# collect(values(rdd)) # list(2, 4)
-#}
-# @rdname values
-# @aliases values,RDD
+#' Return an RDD with the values of each tuple.
+#'
+#' @param x The RDD from which the values of each tuple is returned.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, 2), list(3, 4)))
+#' collect(values(rdd)) # list(2, 4)
+#'}
+#' @rdname values
+#' @aliases values,RDD
+#' @noRd
 setMethod("values",
           signature(x = "RDD"),
           function(x) {
@@ -111,23 +115,24 @@ setMethod("values",
             lapply(x, func)
           })
 
-# Applies a function to all values of the elements, without modifying the keys.
-#
-# The same as `mapValues()' in Spark.
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on the value of each element.
-# @return a new RDD created by the transformation.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:10)
-# makePairs <- lapply(rdd, function(x) { list(x, x) })
-# collect(mapValues(makePairs, function(x) { x * 2) })
-# Output: list(list(1,2), list(2,4), list(3,6), ...)
-#}
-# @rdname mapValues
-# @aliases mapValues,RDD,function-method
+#' Applies a function to all values of the elements, without modifying the keys.
+#'
+#' The same as `mapValues()' in Spark.
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on the value of each element.
+#' @return a new RDD created by the transformation.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:10)
+#' makePairs <- lapply(rdd, function(x) { list(x, x) })
+#' collect(mapValues(makePairs, function(x) { x * 2) })
+#' Output: list(list(1,2), list(2,4), list(3,6), ...)
+#'}
+#' @rdname mapValues
+#' @aliases mapValues,RDD,function-method
+#' @noRd
 setMethod("mapValues",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
@@ -137,23 +142,24 @@ setMethod("mapValues",
             lapply(X, func)
           })
 
-# Pass each value in the key-value pair RDD through a flatMap function without
-# changing the keys; this also retains the original RDD's partitioning.
-#
-# The same as 'flatMapValues()' in Spark.
-#
-# @param X The RDD to apply the transformation.
-# @param FUN the transformation to apply on the value of each element.
-# @return a new RDD created by the transformation.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, c(1,2)), list(2, c(3,4))))
-# collect(flatMapValues(rdd, function(x) { x }))
-# Output: list(list(1,1), list(1,2), list(2,3), list(2,4))
-#}
-# @rdname flatMapValues
-# @aliases flatMapValues,RDD,function-method
+#' Pass each value in the key-value pair RDD through a flatMap function without
+#' changing the keys; this also retains the original RDD's partitioning.
+#'
+#' The same as 'flatMapValues()' in Spark.
+#'
+#' @param X The RDD to apply the transformation.
+#' @param FUN the transformation to apply on the value of each element.
+#' @return a new RDD created by the transformation.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, c(1,2)), list(2, c(3,4))))
+#' collect(flatMapValues(rdd, function(x) { x }))
+#' Output: list(list(1,1), list(1,2), list(2,3), list(2,4))
+#'}
+#' @rdname flatMapValues
+#' @aliases flatMapValues,RDD,function-method
+#' @noRd
 setMethod("flatMapValues",
           signature(X = "RDD", FUN = "function"),
           function(X, FUN) {
@@ -165,38 +171,34 @@ setMethod("flatMapValues",
 
 ############ Shuffle Functions ############
 
-# Partition an RDD by key
-#
-# This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
-# For each element of this RDD, the partitioner is used to compute a hash
-# function and the RDD is partitioned using this hash value.
-#
-# @param x The RDD to partition. Should be an RDD where each element is
-#             list(K, V) or c(K, V).
-# @param numPartitions Number of partitions to create.
-# @param ... Other optional arguments to partitionBy.
-#
-# @param partitionFunc The partition function to use. Uses a default hashCode
-#                      function if not provided
-# @return An RDD partitioned using the specified partitioner.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
-# rdd <- parallelize(sc, pairs)
-# parts <- partitionBy(rdd, 2L)
-# collectPartition(parts, 0L) # First partition should contain list(1, 2) and list(1, 4)
-#}
-# @rdname partitionBy
-# @aliases partitionBy,RDD,integer-method
+#' Partition an RDD by key
+#'
+#' This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
+#' For each element of this RDD, the partitioner is used to compute a hash
+#' function and the RDD is partitioned using this hash value.
+#'
+#' @param x The RDD to partition. Should be an RDD where each element is
+#'             list(K, V) or c(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @param ... Other optional arguments to partitionBy.
+#'
+#' @param partitionFunc The partition function to use. Uses a default hashCode
+#'                      function if not provided
+#' @return An RDD partitioned using the specified partitioner.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
+#' rdd <- parallelize(sc, pairs)
+#' parts <- partitionBy(rdd, 2L)
+#' collectPartition(parts, 0L) # First partition should contain list(1, 2) and list(1, 4)
+#'}
+#' @rdname partitionBy
+#' @aliases partitionBy,RDD,integer-method
+#' @noRd
 setMethod("partitionBy",
           signature(x = "RDD", numPartitions = "numeric"),
           function(x, numPartitions, partitionFunc = hashCode) {
-
-            #if (missing(partitionFunc)) {
-            #  partitionFunc <- hashCode
-            #}
-
             partitionFunc <- cleanClosure(partitionFunc)
             serializedHashFuncBytes <- serialize(partitionFunc, connection = NULL)
 
@@ -233,27 +235,28 @@ setMethod("partitionBy",
             RDD(r, serializedMode = "byte")
           })
 
-# Group values by key
-#
-# This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
-# and group values for each key in the RDD into a single sequence.
-#
-# @param x The RDD to group. Should be an RDD where each element is
-#             list(K, V) or c(K, V).
-# @param numPartitions Number of partitions to create.
-# @return An RDD where each element is list(K, list(V))
-# @seealso reduceByKey
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
-# rdd <- parallelize(sc, pairs)
-# parts <- groupByKey(rdd, 2L)
-# grouped <- collect(parts)
-# grouped[[1]] # Should be a list(1, list(2, 4))
-#}
-# @rdname groupByKey
-# @aliases groupByKey,RDD,integer-method
+#' Group values by key
+#'
+#' This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
+#' and group values for each key in the RDD into a single sequence.
+#'
+#' @param x The RDD to group. Should be an RDD where each element is
+#'             list(K, V) or c(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @return An RDD where each element is list(K, list(V))
+#' @seealso reduceByKey
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
+#' rdd <- parallelize(sc, pairs)
+#' parts <- groupByKey(rdd, 2L)
+#' grouped <- collect(parts)
+#' grouped[[1]] # Should be a list(1, list(2, 4))
+#'}
+#' @rdname groupByKey
+#' @aliases groupByKey,RDD,integer-method
+#' @noRd
 setMethod("groupByKey",
           signature(x = "RDD", numPartitions = "numeric"),
           function(x, numPartitions) {
@@ -291,28 +294,29 @@ setMethod("groupByKey",
             lapplyPartition(shuffled, groupVals)
           })
 
-# Merge values by key
-#
-# This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
-# and merges the values for each key using an associative reduce function.
-#
-# @param x The RDD to reduce by key. Should be an RDD where each element is
-#             list(K, V) or c(K, V).
-# @param combineFunc The associative reduce function to use.
-# @param numPartitions Number of partitions to create.
-# @return An RDD where each element is list(K, V') where V' is the merged
-#         value
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
-# rdd <- parallelize(sc, pairs)
-# parts <- reduceByKey(rdd, "+", 2L)
-# reduced <- collect(parts)
-# reduced[[1]] # Should be a list(1, 6)
-#}
-# @rdname reduceByKey
-# @aliases reduceByKey,RDD,integer-method
+#'  Merge values by key
+#'
+#' This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
+#' and merges the values for each key using an associative reduce function.
+#'
+#' @param x The RDD to reduce by key. Should be an RDD where each element is
+#'             list(K, V) or c(K, V).
+#' @param combineFunc The associative reduce function to use.
+#' @param numPartitions Number of partitions to create.
+#' @return An RDD where each element is list(K, V') where V' is the merged
+#'         value
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
+#' rdd <- parallelize(sc, pairs)
+#' parts <- reduceByKey(rdd, "+", 2L)
+#' reduced <- collect(parts)
+#' reduced[[1]] # Should be a list(1, 6)
+#'}
+#' @rdname reduceByKey
+#' @aliases reduceByKey,RDD,integer-method
+#' @noRd
 setMethod("reduceByKey",
           signature(x = "RDD", combineFunc = "ANY", numPartitions = "numeric"),
           function(x, combineFunc, numPartitions) {
@@ -332,27 +336,28 @@ setMethod("reduceByKey",
             lapplyPartition(shuffled, reduceVals)
           })
 
-# Merge values by key locally
-#
-# This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
-# and merges the values for each key using an associative reduce function, but return the
-# results immediately to the driver as an R list.
-#
-# @param x The RDD to reduce by key. Should be an RDD where each element is
-#             list(K, V) or c(K, V).
-# @param combineFunc The associative reduce function to use.
-# @return A list of elements of type list(K, V') where V' is the merged value for each key
-# @seealso reduceByKey
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
-# rdd <- parallelize(sc, pairs)
-# reduced <- reduceByKeyLocally(rdd, "+")
-# reduced # list(list(1, 6), list(1.1, 3))
-#}
-# @rdname reduceByKeyLocally
-# @aliases reduceByKeyLocally,RDD,integer-method
+#' Merge values by key locally
+#'
+#' This function operates on RDDs where every element is of the form list(K, V) or c(K, V).
+#' and merges the values for each key using an associative reduce function, but return the
+#' results immediately to the driver as an R list.
+#'
+#' @param x The RDD to reduce by key. Should be an RDD where each element is
+#'             list(K, V) or c(K, V).
+#' @param combineFunc The associative reduce function to use.
+#' @return A list of elements of type list(K, V') where V' is the merged value for each key
+#' @seealso reduceByKey
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
+#' rdd <- parallelize(sc, pairs)
+#' reduced <- reduceByKeyLocally(rdd, "+")
+#' reduced # list(list(1, 6), list(1.1, 3))
+#'}
+#' @rdname reduceByKeyLocally
+#' @aliases reduceByKeyLocally,RDD,integer-method
+#' @noRd
 setMethod("reduceByKeyLocally",
           signature(x = "RDD", combineFunc = "ANY"),
           function(x, combineFunc) {
@@ -384,41 +389,40 @@ setMethod("reduceByKeyLocally",
             convertEnvsToList(merged[[1]], merged[[2]])
           })
 
-# Combine values by key
-#
-# Generic function to combine the elements for each key using a custom set of
-# aggregation functions. Turns an RDD[(K, V)] into a result of type RDD[(K, C)],
-# for a "combined type" C. Note that V and C can be different -- for example, one
-# might group an RDD of type (Int, Int) into an RDD of type (Int, Seq[Int]).
-
-# Users provide three functions:
-# \itemize{
-#   \item createCombiner, which turns a V into a C (e.g., creates a one-element list)
-#   \item mergeValue, to merge a V into a C (e.g., adds it to the end of a list) -
-#   \item mergeCombiners, to combine two C's into a single one (e.g., concatentates
-#    two lists).
-# }
-#
-# @param x The RDD to combine. Should be an RDD where each element is
-#             list(K, V) or c(K, V).
-# @param createCombiner Create a combiner (C) given a value (V)
-# @param mergeValue Merge the given value (V) with an existing combiner (C)
-# @param mergeCombiners Merge two combiners and return a new combiner
-# @param numPartitions Number of partitions to create.
-# @return An RDD where each element is list(K, C) where C is the combined type
-#
-# @seealso groupByKey, reduceByKey
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
-# rdd <- parallelize(sc, pairs)
-# parts <- combineByKey(rdd, function(x) { x }, "+", "+", 2L)
-# combined <- collect(parts)
-# combined[[1]] # Should be a list(1, 6)
-#}
-# @rdname combineByKey
-# @aliases combineByKey,RDD,ANY,ANY,ANY,integer-method
+#' Combine values by key
+#'
+#' Generic function to combine the elements for each key using a custom set of
+#' aggregation functions. Turns an RDD[(K, V)] into a result of type RDD[(K, C)],
+#' for a "combined type" C. Note that V and C can be different -- for example, one
+#' might group an RDD of type (Int, Int) into an RDD of type (Int, Seq[Int]).
+#' Users provide three functions:
+#' \itemize{
+#'   \item createCombiner, which turns a V into a C (e.g., creates a one-element list)
+#'   \item mergeValue, to merge a V into a C (e.g., adds it to the end of a list) -
+#'   \item mergeCombiners, to combine two C's into a single one (e.g., concatentates
+#'    two lists).
+#' }
+#'
+#' @param x The RDD to combine. Should be an RDD where each element is
+#'             list(K, V) or c(K, V).
+#' @param createCombiner Create a combiner (C) given a value (V)
+#' @param mergeValue Merge the given value (V) with an existing combiner (C)
+#' @param mergeCombiners Merge two combiners and return a new combiner
+#' @param numPartitions Number of partitions to create.
+#' @return An RDD where each element is list(K, C) where C is the combined type
+#' @seealso groupByKey, reduceByKey
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' pairs <- list(list(1, 2), list(1.1, 3), list(1, 4))
+#' rdd <- parallelize(sc, pairs)
+#' parts <- combineByKey(rdd, function(x) { x }, "+", "+", 2L)
+#' combined <- collect(parts)
+#' combined[[1]] # Should be a list(1, 6)
+#'}
+#' @rdname combineByKey
+#' @aliases combineByKey,RDD,ANY,ANY,ANY,integer-method
+#' @noRd
 setMethod("combineByKey",
           signature(x = "RDD", createCombiner = "ANY", mergeValue = "ANY",
                     mergeCombiners = "ANY", numPartitions = "numeric"),
@@ -450,36 +454,37 @@ setMethod("combineByKey",
             lapplyPartition(shuffled, mergeAfterShuffle)
           })
 
-# Aggregate a pair RDD by each key.
-#
-# Aggregate the values of each key in an RDD, using given combine functions
-# and a neutral "zero value". This function can return a different result type,
-# U, than the type of the values in this RDD, V. Thus, we need one operation
-# for merging a V into a U and one operation for merging two U's, The former
-# operation is used for merging values within a partition, and the latter is
-# used for merging values between partitions. To avoid memory allocation, both
-# of these functions are allowed to modify and return their first argument
-# instead of creating a new U.
-#
-# @param x An RDD.
-# @param zeroValue A neutral "zero value".
-# @param seqOp A function to aggregate the values of each key. It may return
-#              a different result type from the type of the values.
-# @param combOp A function to aggregate results of seqOp.
-# @return An RDD containing the aggregation result.
-# @seealso foldByKey, combineByKey
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, 1), list(1, 2), list(2, 3), list(2, 4)))
-# zeroValue <- list(0, 0)
-# seqOp <- function(x, y) { list(x[[1]] + y, x[[2]] + 1) }
-# combOp <- function(x, y) { list(x[[1]] + y[[1]], x[[2]] + y[[2]]) }
-# aggregateByKey(rdd, zeroValue, seqOp, combOp, 2L)
-#   # list(list(1, list(3, 2)), list(2, list(7, 2)))
-#}
-# @rdname aggregateByKey
-# @aliases aggregateByKey,RDD,ANY,ANY,ANY,integer-method
+#' Aggregate a pair RDD by each key.
+#'
+#' Aggregate the values of each key in an RDD, using given combine functions
+#' and a neutral "zero value". This function can return a different result type,
+#' U, than the type of the values in this RDD, V. Thus, we need one operation
+#' for merging a V into a U and one operation for merging two U's, The former
+#' operation is used for merging values within a partition, and the latter is
+#' used for merging values between partitions. To avoid memory allocation, both
+#' of these functions are allowed to modify and return their first argument
+#' instead of creating a new U.
+#'
+#' @param x An RDD.
+#' @param zeroValue A neutral "zero value".
+#' @param seqOp A function to aggregate the values of each key. It may return
+#'              a different result type from the type of the values.
+#' @param combOp A function to aggregate results of seqOp.
+#' @return An RDD containing the aggregation result.
+#' @seealso foldByKey, combineByKey
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, 1), list(1, 2), list(2, 3), list(2, 4)))
+#' zeroValue <- list(0, 0)
+#' seqOp <- function(x, y) { list(x[[1]] + y, x[[2]] + 1) }
+#' combOp <- function(x, y) { list(x[[1]] + y[[1]], x[[2]] + y[[2]]) }
+#' aggregateByKey(rdd, zeroValue, seqOp, combOp, 2L)
+#'   # list(list(1, list(3, 2)), list(2, list(7, 2)))
+#'}
+#' @rdname aggregateByKey
+#' @aliases aggregateByKey,RDD,ANY,ANY,ANY,integer-method
+#' @noRd
 setMethod("aggregateByKey",
           signature(x = "RDD", zeroValue = "ANY", seqOp = "ANY",
                     combOp = "ANY", numPartitions = "numeric"),
@@ -491,26 +496,27 @@ setMethod("aggregateByKey",
             combineByKey(x, createCombiner, seqOp, combOp, numPartitions)
           })
 
-# Fold a pair RDD by each key.
-#
-# Aggregate the values of each key in an RDD, using an associative function "func"
-# and a neutral "zero value" which may be added to the result an arbitrary
-# number of times, and must not change the result (e.g., 0 for addition, or
-# 1 for multiplication.).
-#
-# @param x An RDD.
-# @param zeroValue A neutral "zero value".
-# @param func An associative function for folding values of each key.
-# @return An RDD containing the aggregation result.
-# @seealso aggregateByKey, combineByKey
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(1, 1), list(1, 2), list(2, 3), list(2, 4)))
-# foldByKey(rdd, 0, "+", 2L) # list(list(1, 3), list(2, 7))
-#}
-# @rdname foldByKey
-# @aliases foldByKey,RDD,ANY,ANY,integer-method
+#' Fold a pair RDD by each key.
+#'
+#' Aggregate the values of each key in an RDD, using an associative function "func"
+#' and a neutral "zero value" which may be added to the result an arbitrary
+#' number of times, and must not change the result (e.g., 0 for addition, or
+#' 1 for multiplication.).
+#'
+#' @param x An RDD.
+#' @param zeroValue A neutral "zero value".
+#' @param func An associative function for folding values of each key.
+#' @return An RDD containing the aggregation result.
+#' @seealso aggregateByKey, combineByKey
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(1, 1), list(1, 2), list(2, 3), list(2, 4)))
+#' foldByKey(rdd, 0, "+", 2L) # list(list(1, 3), list(2, 7))
+#'}
+#' @rdname foldByKey
+#' @aliases foldByKey,RDD,ANY,ANY,integer-method
+#' @noRd
 setMethod("foldByKey",
           signature(x = "RDD", zeroValue = "ANY",
                     func = "ANY", numPartitions = "numeric"),
@@ -520,28 +526,29 @@ setMethod("foldByKey",
 
 ############ Binary Functions #############
 
-# Join two RDDs
-#
-# @description
-# \code{join} This function joins two RDDs where every element is of the form list(K, V).
-# The key types of the two RDDs should be the same.
-#
-# @param x An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param y An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param numPartitions Number of partitions to create.
-# @return a new RDD containing all pairs of elements with matching keys in
-#         two input RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
-# rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
-# join(rdd1, rdd2, 2L) # list(list(1, list(1, 2)), list(1, list(1, 3))
-#}
-# @rdname join-methods
-# @aliases join,RDD,RDD-method
+#' Join two RDDs
+#'
+#' @description
+#' \code{join} This function joins two RDDs where every element is of the form list(K, V).
+#' The key types of the two RDDs should be the same.
+#'
+#' @param x An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param y An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @return a new RDD containing all pairs of elements with matching keys in
+#'         two input RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
+#' rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
+#' join(rdd1, rdd2, 2L) # list(list(1, list(1, 2)), list(1, list(1, 3))
+#'}
+#' @rdname join-methods
+#' @aliases join,RDD,RDD-method
+#' @noRd
 setMethod("join",
           signature(x = "RDD", y = "RDD"),
           function(x, y, numPartitions) {
@@ -556,30 +563,31 @@ setMethod("join",
                                     doJoin)
           })
 
-# Left outer join two RDDs
-#
-# @description
-# \code{leftouterjoin} This function left-outer-joins two RDDs where every element is of
-# the form list(K, V). The key types of the two RDDs should be the same.
-#
-# @param x An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param y An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param numPartitions Number of partitions to create.
-# @return For each element (k, v) in x, the resulting RDD will either contain
-#         all pairs (k, (v, w)) for (k, w) in rdd2, or the pair (k, (v, NULL))
-#         if no elements in rdd2 have key k.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
-# rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
-# leftOuterJoin(rdd1, rdd2, 2L)
-# # list(list(1, list(1, 2)), list(1, list(1, 3)), list(2, list(4, NULL)))
-#}
-# @rdname join-methods
-# @aliases leftOuterJoin,RDD,RDD-method
+#' Left outer join two RDDs
+#'
+#' @description
+#' \code{leftouterjoin} This function left-outer-joins two RDDs where every element is of
+#' the form list(K, V). The key types of the two RDDs should be the same.
+#'
+#' @param x An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param y An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @return For each element (k, v) in x, the resulting RDD will either contain
+#'         all pairs (k, (v, w)) for (k, w) in rdd2, or the pair (k, (v, NULL))
+#'         if no elements in rdd2 have key k.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
+#' rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
+#' leftOuterJoin(rdd1, rdd2, 2L)
+#' # list(list(1, list(1, 2)), list(1, list(1, 3)), list(2, list(4, NULL)))
+#'}
+#' @rdname join-methods
+#' @aliases leftOuterJoin,RDD,RDD-method
+#' @noRd
 setMethod("leftOuterJoin",
           signature(x = "RDD", y = "RDD", numPartitions = "numeric"),
           function(x, y, numPartitions) {
@@ -593,30 +601,31 @@ setMethod("leftOuterJoin",
             joined <- flatMapValues(groupByKey(unionRDD(xTagged, yTagged), numPartitions), doJoin)
           })
 
-# Right outer join two RDDs
-#
-# @description
-# \code{rightouterjoin} This function right-outer-joins two RDDs where every element is of
-# the form list(K, V). The key types of the two RDDs should be the same.
-#
-# @param x An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param y An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param numPartitions Number of partitions to create.
-# @return For each element (k, w) in y, the resulting RDD will either contain
-#         all pairs (k, (v, w)) for (k, v) in x, or the pair (k, (NULL, w))
-#         if no elements in x have key k.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list(1, 2), list(1, 3)))
-# rdd2 <- parallelize(sc, list(list(1, 1), list(2, 4)))
-# rightOuterJoin(rdd1, rdd2, 2L)
-# # list(list(1, list(2, 1)), list(1, list(3, 1)), list(2, list(NULL, 4)))
-#}
-# @rdname join-methods
-# @aliases rightOuterJoin,RDD,RDD-method
+#' Right outer join two RDDs
+#'
+#' @description
+#' \code{rightouterjoin} This function right-outer-joins two RDDs where every element is of
+#' the form list(K, V). The key types of the two RDDs should be the same.
+#'
+#' @param x An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param y An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @return For each element (k, w) in y, the resulting RDD will either contain
+#'         all pairs (k, (v, w)) for (k, v) in x, or the pair (k, (NULL, w))
+#'         if no elements in x have key k.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list(1, 2), list(1, 3)))
+#' rdd2 <- parallelize(sc, list(list(1, 1), list(2, 4)))
+#' rightOuterJoin(rdd1, rdd2, 2L)
+#' # list(list(1, list(2, 1)), list(1, list(3, 1)), list(2, list(NULL, 4)))
+#'}
+#' @rdname join-methods
+#' @aliases rightOuterJoin,RDD,RDD-method
+#' @noRd
 setMethod("rightOuterJoin",
           signature(x = "RDD", y = "RDD", numPartitions = "numeric"),
           function(x, y, numPartitions) {
@@ -630,33 +639,34 @@ setMethod("rightOuterJoin",
             joined <- flatMapValues(groupByKey(unionRDD(xTagged, yTagged), numPartitions), doJoin)
           })
 
-# Full outer join two RDDs
-#
-# @description
-# \code{fullouterjoin} This function full-outer-joins two RDDs where every element is of
-# the form list(K, V). The key types of the two RDDs should be the same.
-#
-# @param x An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param y An RDD to be joined. Should be an RDD where each element is
-#             list(K, V).
-# @param numPartitions Number of partitions to create.
-# @return For each element (k, v) in x and (k, w) in y, the resulting RDD
-#         will contain all pairs (k, (v, w)) for both (k, v) in x and
-#         (k, w) in y, or the pair (k, (NULL, w))/(k, (v, NULL)) if no elements
-#         in x/y have key k.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list(1, 2), list(1, 3), list(3, 3)))
-# rdd2 <- parallelize(sc, list(list(1, 1), list(2, 4)))
-# fullOuterJoin(rdd1, rdd2, 2L) # list(list(1, list(2, 1)),
-#                               #      list(1, list(3, 1)),
-#                               #      list(2, list(NULL, 4)))
-#                               #      list(3, list(3, NULL)),
-#}
-# @rdname join-methods
-# @aliases fullOuterJoin,RDD,RDD-method
+#' Full outer join two RDDs
+#'
+#' @description
+#' \code{fullouterjoin} This function full-outer-joins two RDDs where every element is of
+#' the form list(K, V). The key types of the two RDDs should be the same.
+#'
+#' @param x An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param y An RDD to be joined. Should be an RDD where each element is
+#'             list(K, V).
+#' @param numPartitions Number of partitions to create.
+#' @return For each element (k, v) in x and (k, w) in y, the resulting RDD
+#'         will contain all pairs (k, (v, w)) for both (k, v) in x and
+#'         (k, w) in y, or the pair (k, (NULL, w))/(k, (v, NULL)) if no elements
+#'         in x/y have key k.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list(1, 2), list(1, 3), list(3, 3)))
+#' rdd2 <- parallelize(sc, list(list(1, 1), list(2, 4)))
+#' fullOuterJoin(rdd1, rdd2, 2L) # list(list(1, list(2, 1)),
+#'                               #      list(1, list(3, 1)),
+#'                               #      list(2, list(NULL, 4)))
+#'                               #      list(3, list(3, NULL)),
+#'}
+#' @rdname join-methods
+#' @aliases fullOuterJoin,RDD,RDD-method
+#' @noRd
 setMethod("fullOuterJoin",
           signature(x = "RDD", y = "RDD", numPartitions = "numeric"),
           function(x, y, numPartitions) {
@@ -670,23 +680,24 @@ setMethod("fullOuterJoin",
             joined <- flatMapValues(groupByKey(unionRDD(xTagged, yTagged), numPartitions), doJoin)
           })
 
-# For each key k in several RDDs, return a resulting RDD that
-# whose values are a list of values for the key in all RDDs.
-#
-# @param ... Several RDDs.
-# @param numPartitions Number of partitions to create.
-# @return a new RDD containing all pairs of elements with values in a list
-# in all RDDs.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
-# rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
-# cogroup(rdd1, rdd2, numPartitions = 2L)
-# # list(list(1, list(1, list(2, 3))), list(2, list(list(4), list()))
-#}
-# @rdname cogroup
-# @aliases cogroup,RDD-method
+#' For each key k in several RDDs, return a resulting RDD that
+#' whose values are a list of values for the key in all RDDs.
+#'
+#' @param ... Several RDDs.
+#' @param numPartitions Number of partitions to create.
+#' @return a new RDD containing all pairs of elements with values in a list
+#' in all RDDs.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list(1, 1), list(2, 4)))
+#' rdd2 <- parallelize(sc, list(list(1, 2), list(1, 3)))
+#' cogroup(rdd1, rdd2, numPartitions = 2L)
+#' # list(list(1, list(1, list(2, 3))), list(2, list(list(4), list()))
+#'}
+#' @rdname cogroup
+#' @aliases cogroup,RDD-method
+#' @noRd
 setMethod("cogroup",
           "RDD",
           function(..., numPartitions) {
@@ -722,20 +733,21 @@ setMethod("cogroup",
                                      group.func)
           })
 
-# Sort a (k, v) pair RDD by k.
-#
-# @param x A (k, v) pair RDD to be sorted.
-# @param ascending A flag to indicate whether the sorting is ascending or descending.
-# @param numPartitions Number of partitions to create.
-# @return An RDD where all (k, v) pair elements are sorted.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, list(list(3, 1), list(2, 2), list(1, 3)))
-# collect(sortByKey(rdd)) # list (list(1, 3), list(2, 2), list(3, 1))
-#}
-# @rdname sortByKey
-# @aliases sortByKey,RDD,RDD-method
+#' Sort a (k, v) pair RDD by k.
+#'
+#' @param x A (k, v) pair RDD to be sorted.
+#' @param ascending A flag to indicate whether the sorting is ascending or descending.
+#' @param numPartitions Number of partitions to create.
+#' @return An RDD where all (k, v) pair elements are sorted.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, list(list(3, 1), list(2, 2), list(1, 3)))
+#' collect(sortByKey(rdd)) # list (list(1, 3), list(2, 2), list(3, 1))
+#'}
+#' @rdname sortByKey
+#' @aliases sortByKey,RDD,RDD-method
+#' @noRd
 setMethod("sortByKey",
           signature(x = "RDD"),
           function(x, ascending = TRUE, numPartitions = SparkR:::numPartitions(x)) {
@@ -784,25 +796,26 @@ setMethod("sortByKey",
             lapplyPartition(newRDD, partitionFunc)
           })
 
-# Subtract a pair RDD with another pair RDD.
-#
-# Return an RDD with the pairs from x whose keys are not in other.
-#
-# @param x An RDD.
-# @param other An RDD.
-# @param numPartitions Number of the partitions in the result RDD.
-# @return An RDD with the pairs from x whose keys are not in other.
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd1 <- parallelize(sc, list(list("a", 1), list("b", 4),
-#                              list("b", 5), list("a", 2)))
-# rdd2 <- parallelize(sc, list(list("a", 3), list("c", 1)))
-# collect(subtractByKey(rdd1, rdd2))
-# # list(list("b", 4), list("b", 5))
-#}
-# @rdname subtractByKey
-# @aliases subtractByKey,RDD
+#' Subtract a pair RDD with another pair RDD.
+#'
+#' Return an RDD with the pairs from x whose keys are not in other.
+#'
+#' @param x An RDD.
+#' @param other An RDD.
+#' @param numPartitions Number of the partitions in the result RDD.
+#' @return An RDD with the pairs from x whose keys are not in other.
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd1 <- parallelize(sc, list(list("a", 1), list("b", 4),
+#'                              list("b", 5), list("a", 2)))
+#' rdd2 <- parallelize(sc, list(list("a", 3), list("c", 1)))
+#' collect(subtractByKey(rdd1, rdd2))
+#' # list(list("b", 4), list("b", 5))
+#'}
+#' @rdname subtractByKey
+#' @aliases subtractByKey,RDD
+#' @noRd
 setMethod("subtractByKey",
           signature(x = "RDD", other = "RDD"),
           function(x, other, numPartitions = SparkR:::numPartitions(x)) {
@@ -818,41 +831,42 @@ setMethod("subtractByKey",
                           function (v) { v[[1]] })
           })
 
-# Return a subset of this RDD sampled by key.
-#
-# @description
-# \code{sampleByKey} Create a sample of this RDD using variable sampling rates
-# for different keys as specified by fractions, a key to sampling rate map.
-#
-# @param x The RDD to sample elements by key, where each element is
-#             list(K, V) or c(K, V).
-# @param withReplacement Sampling with replacement or not
-# @param fraction The (rough) sample target fraction
-# @param seed Randomness seed value
-# @examples
-#\dontrun{
-# sc <- sparkR.init()
-# rdd <- parallelize(sc, 1:3000)
-# pairs <- lapply(rdd, function(x) { if (x %% 3 == 0) list("a", x)
-#                                    else { if (x %% 3 == 1) list("b", x) else list("c", x) }})
-# fractions <- list(a = 0.2, b = 0.1, c = 0.3)
-# sample <- sampleByKey(pairs, FALSE, fractions, 1618L)
-# 100 < length(lookup(sample, "a")) && 300 > length(lookup(sample, "a")) # TRUE
-# 50 < length(lookup(sample, "b")) && 150 > length(lookup(sample, "b")) # TRUE
-# 200 < length(lookup(sample, "c")) && 400 > length(lookup(sample, "c")) # TRUE
-# lookup(sample, "a")[which.min(lookup(sample, "a"))] >= 0 # TRUE
-# lookup(sample, "a")[which.max(lookup(sample, "a"))] <= 2000 # TRUE
-# lookup(sample, "b")[which.min(lookup(sample, "b"))] >= 0 # TRUE
-# lookup(sample, "b")[which.max(lookup(sample, "b"))] <= 2000 # TRUE
-# lookup(sample, "c")[which.min(lookup(sample, "c"))] >= 0 # TRUE
-# lookup(sample, "c")[which.max(lookup(sample, "c"))] <= 2000 # TRUE
-# fractions <- list(a = 0.2, b = 0.1, c = 0.3, d = 0.4)
-# sample <- sampleByKey(pairs, FALSE, fractions, 1618L) # Key "d" will be ignored
-# fractions <- list(a = 0.2, b = 0.1)
-# sample <- sampleByKey(pairs, FALSE, fractions, 1618L) # KeyError: "c"
-#}
-# @rdname sampleByKey
-# @aliases sampleByKey,RDD-method
+#' Return a subset of this RDD sampled by key.
+#'
+#' @description
+#' \code{sampleByKey} Create a sample of this RDD using variable sampling rates
+#' for different keys as specified by fractions, a key to sampling rate map.
+#'
+#' @param x The RDD to sample elements by key, where each element is
+#'             list(K, V) or c(K, V).
+#' @param withReplacement Sampling with replacement or not
+#' @param fraction The (rough) sample target fraction
+#' @param seed Randomness seed value
+#' @examples
+#'\dontrun{
+#' sc <- sparkR.init()
+#' rdd <- parallelize(sc, 1:3000)
+#' pairs <- lapply(rdd, function(x) { if (x %% 3 == 0) list("a", x)
+#'                                    else { if (x %% 3 == 1) list("b", x) else list("c", x) }})
+#' fractions <- list(a = 0.2, b = 0.1, c = 0.3)
+#' sample <- sampleByKey(pairs, FALSE, fractions, 1618L)
+#' 100 < length(lookup(sample, "a")) && 300 > length(lookup(sample, "a")) # TRUE
+#' 50 < length(lookup(sample, "b")) && 150 > length(lookup(sample, "b")) # TRUE
+#' 200 < length(lookup(sample, "c")) && 400 > length(lookup(sample, "c")) # TRUE
+#' lookup(sample, "a")[which.min(lookup(sample, "a"))] >= 0 # TRUE
+#' lookup(sample, "a")[which.max(lookup(sample, "a"))] <= 2000 # TRUE
+#' lookup(sample, "b")[which.min(lookup(sample, "b"))] >= 0 # TRUE
+#' lookup(sample, "b")[which.max(lookup(sample, "b"))] <= 2000 # TRUE
+#' lookup(sample, "c")[which.min(lookup(sample, "c"))] >= 0 # TRUE
+#' lookup(sample, "c")[which.max(lookup(sample, "c"))] <= 2000 # TRUE
+#' fractions <- list(a = 0.2, b = 0.1, c = 0.3, d = 0.4)
+#' sample <- sampleByKey(pairs, FALSE, fractions, 1618L) # Key "d" will be ignored
+#' fractions <- list(a = 0.2, b = 0.1)
+#' sample <- sampleByKey(pairs, FALSE, fractions, 1618L) # KeyError: "c"
+#'}
+#' @rdname sampleByKey
+#' @aliases sampleByKey,RDD-method
+#' @noRd
 setMethod("sampleByKey",
           signature(x = "RDD", withReplacement = "logical",
                     fractions = "vector", seed = "integer"),
diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index 004d08e74e1c..ebe2b2b8dc1d 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -34,7 +34,6 @@ connExists <- function(env) {
 sparkR.stop <- function() {
   env <- .sparkREnv
   if (exists(".sparkRCon", envir = env)) {
-    # cat("Stopping SparkR\n")
     if (exists(".sparkRjsc", envir = env)) {
       sc <- get(".sparkRjsc", envir = env)
       callJMethod(sc, "stop")
@@ -78,7 +77,7 @@ sparkR.stop <- function() {
 #' Initialize a new Spark Context.
 #'
 #' This function initializes a new SparkContext. For details on how to initialize
-#' and use SparkR, refer to SparkR programming guide at 
+#' and use SparkR, refer to SparkR programming guide at
 #' \url{http://spark.apache.org/docs/latest/sparkr.html#starting-up-sparkcontext-sqlcontext}.
 #'
 #' @param master The Spark master URL.
diff --git a/R/pkg/inst/profile/shell.R b/R/pkg/inst/profile/shell.R
index 7189f1a26093..90a3761e41f8 100644
--- a/R/pkg/inst/profile/shell.R
+++ b/R/pkg/inst/profile/shell.R
@@ -38,7 +38,7 @@
   if (nchar(sparkVer) == 0) {
     cat("\n")
   } else {
-    cat("   version ", sparkVer, "\n") 
+    cat("   version ", sparkVer, "\n")
   }
   cat("    /_/", "\n")
   cat("\n")

From 2035ed392e0a9c18ff9c176a7b0f0097ed1276df Mon Sep 17 00:00:00 2001
From: Lewuathe <lewuathe@me.com>
Date: Thu, 12 Nov 2015 20:09:42 -0800
Subject: [PATCH 666/896] [SPARK-11717] Ignore R session and history files from
 git

see: https://issues.apache.org/jira/browse/SPARK-11717

SparkR generates R session data and history files under current directory.
It might be useful to ignore these files even running SparkR on spark directory for test or development.

Author: Lewuathe <lewuathe@me.com>

Closes #9681 from Lewuathe/SPARK-11717.
---
 .gitignore | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.gitignore b/.gitignore
index debad77ec2ad..08f2d8f7543f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,3 +74,7 @@ metastore/
 warehouse/
 TempStatsStore/
 sql/hive-thriftserver/test_warehouses
+
+# For R session data
+.RHistory
+.RData

From ea5ae2705afa4eaadd4192c37d74c97364378cf9 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 12 Nov 2015 21:29:43 -0800
Subject: [PATCH 667/896] [SPARK-11629][ML][PYSPARK][DOC] Python example code
 for Multilayer Perceptron Classification

Add Python example code for Multilayer Perceptron Classification, and make example code in user guide document testable. mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9594 from yanboliang/spark-11629.
---
 docs/ml-ann.md                                | 71 ++----------------
 ...MultilayerPerceptronClassifierExample.java | 74 +++++++++++++++++++
 .../multilayer_perceptron_classification.py   | 56 ++++++++++++++
 ...ultilayerPerceptronClassifierExample.scala | 71 ++++++++++++++++++
 4 files changed, 206 insertions(+), 66 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
 create mode 100644 examples/src/main/python/ml/multilayer_perceptron_classification.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala

diff --git a/docs/ml-ann.md b/docs/ml-ann.md
index d5ddd92af1e9..6e763e8f4156 100644
--- a/docs/ml-ann.md
+++ b/docs/ml-ann.md
@@ -48,76 +48,15 @@ MLPC employes backpropagation for learning the model. We use logistic loss funct
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
-
-{% highlight scala %}
-import org.apache.spark.ml.classification.MultilayerPerceptronClassifier
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.sql.Row
-
-// Load training data
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt").toDF()
-// Split the data into train and test
-val splits = data.randomSplit(Array(0.6, 0.4), seed = 1234L)
-val train = splits(0)
-val test = splits(1)
-// specify layers for the neural network: 
-// input layer of size 4 (features), two intermediate of size 5 and 4 and output of size 3 (classes)
-val layers = Array[Int](4, 5, 4, 3)
-// create the trainer and set its parameters
-val trainer = new MultilayerPerceptronClassifier()
-  .setLayers(layers)
-  .setBlockSize(128)
-  .setSeed(1234L)
-  .setMaxIter(100)
-// train the model
-val model = trainer.fit(train)
-// compute precision on the test set
-val result = model.transform(test)
-val predictionAndLabels = result.select("prediction", "label")
-val evaluator = new MulticlassClassificationEvaluator()
-  .setMetricName("precision")
-println("Precision:" + evaluator.evaluate(predictionAndLabels))
-{% endhighlight %}
-
+{% include_example scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
+{% include_example java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java %}
+</div>
 
-{% highlight java %}
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.ml.classification.MultilayerPerceptronClassificationModel;
-import org.apache.spark.ml.classification.MultilayerPerceptronClassifier;
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-
-// Load training data
-String path = "data/mllib/sample_multiclass_classification_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
-DataFrame dataFrame = sqlContext.createDataFrame(data, LabeledPoint.class);
-// Split the data into train and test
-DataFrame[] splits = dataFrame.randomSplit(new double[]{0.6, 0.4}, 1234L);
-DataFrame train = splits[0];
-DataFrame test = splits[1];
-// specify layers for the neural network:
-// input layer of size 4 (features), two intermediate of size 5 and 4 and output of size 3 (classes)
-int[] layers = new int[] {4, 5, 4, 3};
-// create the trainer and set its parameters
-MultilayerPerceptronClassifier trainer = new MultilayerPerceptronClassifier()
-  .setLayers(layers)
-  .setBlockSize(128)
-  .setSeed(1234L)
-  .setMaxIter(100);
-// train the model
-MultilayerPerceptronClassificationModel model = trainer.fit(train);
-// compute precision on the test set
-DataFrame result = model.transform(test);
-DataFrame predictionAndLabels = result.select("prediction", "label");
-MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
-  .setMetricName("precision");
-System.out.println("Precision = " + evaluator.evaluate(predictionAndLabels));
-{% endhighlight %}
+<div data-lang="python" markdown="1">
+{% include_example python/ml/multilayer_perceptron_classification.py %}
 </div>
 
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
new file mode 100644
index 000000000000..f48e1339c500
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
@@ -0,0 +1,74 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+// $example on$
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.ml.classification.MultilayerPerceptronClassificationModel;
+import org.apache.spark.ml.classification.MultilayerPerceptronClassifier;
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.sql.DataFrame;
+// $example off$
+
+/**
+ * An example for Multilayer Perceptron Classification.
+ */
+public class JavaMultilayerPerceptronClassifierExample {
+
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaMultilayerPerceptronClassifierExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext jsql = new SQLContext(jsc);
+
+    // $example on$
+    // Load training data
+    String path = "data/mllib/sample_multiclass_classification_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), path).toJavaRDD();
+    DataFrame dataFrame = jsql.createDataFrame(data, LabeledPoint.class);
+    // Split the data into train and test
+    DataFrame[] splits = dataFrame.randomSplit(new double[]{0.6, 0.4}, 1234L);
+    DataFrame train = splits[0];
+    DataFrame test = splits[1];
+    // specify layers for the neural network:
+    // input layer of size 4 (features), two intermediate of size 5 and 4
+    // and output of size 3 (classes)
+    int[] layers = new int[] {4, 5, 4, 3};
+    // create the trainer and set its parameters
+    MultilayerPerceptronClassifier trainer = new MultilayerPerceptronClassifier()
+      .setLayers(layers)
+      .setBlockSize(128)
+      .setSeed(1234L)
+      .setMaxIter(100);
+    // train the model
+    MultilayerPerceptronClassificationModel model = trainer.fit(train);
+    // compute precision on the test set
+    DataFrame result = model.transform(test);
+    DataFrame predictionAndLabels = result.select("prediction", "label");
+    MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
+      .setMetricName("precision");
+    System.out.println("Precision = " + evaluator.evaluate(predictionAndLabels));
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/python/ml/multilayer_perceptron_classification.py b/examples/src/main/python/ml/multilayer_perceptron_classification.py
new file mode 100644
index 000000000000..d8ef9f39e3fa
--- /dev/null
+++ b/examples/src/main/python/ml/multilayer_perceptron_classification.py
@@ -0,0 +1,56 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+from pyspark.sql import SQLContext
+# $example on$
+from pyspark.ml.classification import MultilayerPerceptronClassifier
+from pyspark.ml.evaluation import MulticlassClassificationEvaluator
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+
+    sc = SparkContext(appName="multilayer_perceptron_classification_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load training data
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")\
+        .toDF()
+    # Split the data into train and test
+    splits = data.randomSplit([0.6, 0.4], 1234)
+    train = splits[0]
+    test = splits[1]
+    # specify layers for the neural network:
+    # input layer of size 4 (features), two intermediate of size 5 and 4
+    # and output of size 3 (classes)
+    layers = [4, 5, 4, 3]
+    # create the trainer and set its parameters
+    trainer = MultilayerPerceptronClassifier(maxIter=100, layers=layers, blockSize=128, seed=1234)
+    # train the model
+    model = trainer.fit(train)
+    # compute precision on the test set
+    result = model.transform(test)
+    predictionAndLabels = result.select("prediction", "label")
+    evaluator = MulticlassClassificationEvaluator(metricName="precision")
+    print("Precision:" + str(evaluator.evaluate(predictionAndLabels)))
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
new file mode 100644
index 000000000000..99d5f35b5a56
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
@@ -0,0 +1,71 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.{SparkContext, SparkConf}
+import org.apache.spark.sql.SQLContext
+// $example on$
+import org.apache.spark.ml.classification.MultilayerPerceptronClassifier
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+/**
+ * An example for Multilayer Perceptron Classification.
+ */
+object MultilayerPerceptronClassifierExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("MultilayerPerceptronClassifierExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+    import sqlContext.implicits._
+
+    // $example on$
+    // Load training data
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
+      .toDF()
+    // Split the data into train and test
+    val splits = data.randomSplit(Array(0.6, 0.4), seed = 1234L)
+    val train = splits(0)
+    val test = splits(1)
+    // specify layers for the neural network:
+    // input layer of size 4 (features), two intermediate of size 5 and 4
+    // and output of size 3 (classes)
+    val layers = Array[Int](4, 5, 4, 3)
+    // create the trainer and set its parameters
+    val trainer = new MultilayerPerceptronClassifier()
+      .setLayers(layers)
+      .setBlockSize(128)
+      .setSeed(1234L)
+      .setMaxIter(100)
+    // train the model
+    val model = trainer.fit(train)
+    // compute precision on the test set
+    val result = model.transform(test)
+    val predictionAndLabels = result.select("prediction", "label")
+    val evaluator = new MulticlassClassificationEvaluator()
+      .setMetricName("precision")
+    println("Precision:" + evaluator.evaluate(predictionAndLabels))
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:off println

From ad960885bfee7850c18eb5338546cecf2b2e9876 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 12 Nov 2015 22:44:57 -0800
Subject: [PATCH 668/896] [SPARK-8029] Robust shuffle writer

Currently, all the shuffle writer will write to target path directly, the file could be corrupted by other attempt of the same partition on the same executor. They should write to temporary file then rename to target path, as what we do in output committer. In order to make the rename atomic, the temporary file should be created in the same local directory (FileSystem).

This PR is based on #9214 , thanks to squito . Closes #9214

Author: Davies Liu <davies@databricks.com>

Closes #9610 from davies/safe_shuffle.
---
 .../sort/BypassMergeSortShuffleWriter.java    |   9 +-
 .../shuffle/sort/UnsafeShuffleWriter.java     |  13 +-
 .../shuffle/FileShuffleBlockResolver.scala    |  17 +--
 .../shuffle/IndexShuffleBlockResolver.scala   | 102 ++++++++++++++--
 .../shuffle/hash/HashShuffleWriter.scala      |  25 ++++
 .../shuffle/sort/SortShuffleWriter.scala      |  11 +-
 .../apache/spark/storage/BlockManager.scala   |   9 +-
 .../spark/storage/DiskBlockObjectWriter.scala |   5 +-
 .../scala/org/apache/spark/util/Utils.scala   |  12 +-
 .../util/collection/ExternalSorter.scala      |   1 -
 .../sort/IndexShuffleBlockResolverSuite.scala | 114 ++++++++++++++++++
 .../sort/UnsafeShuffleWriterSuite.java        |   9 +-
 .../map/AbstractBytesToBytesMapSuite.java     |   3 +-
 .../sort/UnsafeExternalSorterSuite.java       |   3 +-
 .../scala/org/apache/spark/ShuffleSuite.scala | 107 +++++++++++++++-
 .../BypassMergeSortShuffleWriterSuite.scala   |  14 ++-
 16 files changed, 402 insertions(+), 52 deletions(-)
 create mode 100644 core/src/test/java/org/apache/spark/shuffle/sort/IndexShuffleBlockResolverSuite.scala

diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
index ee82d679935c..a1a1fb01426a 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriter.java
@@ -125,7 +125,7 @@ public void write(Iterator<Product2<K, V>> records) throws IOException {
     assert (partitionWriters == null);
     if (!records.hasNext()) {
       partitionLengths = new long[numPartitions];
-      shuffleBlockResolver.writeIndexFile(shuffleId, mapId, partitionLengths);
+      shuffleBlockResolver.writeIndexFileAndCommit(shuffleId, mapId, partitionLengths, null);
       mapStatus = MapStatus$.MODULE$.apply(blockManager.shuffleServerId(), partitionLengths);
       return;
     }
@@ -155,9 +155,10 @@ public void write(Iterator<Product2<K, V>> records) throws IOException {
       writer.commitAndClose();
     }
 
-    partitionLengths =
-      writePartitionedFile(shuffleBlockResolver.getDataFile(shuffleId, mapId));
-    shuffleBlockResolver.writeIndexFile(shuffleId, mapId, partitionLengths);
+    File output = shuffleBlockResolver.getDataFile(shuffleId, mapId);
+    File tmp = Utils.tempFileWith(output);
+    partitionLengths = writePartitionedFile(tmp);
+    shuffleBlockResolver.writeIndexFileAndCommit(shuffleId, mapId, partitionLengths, tmp);
     mapStatus = MapStatus$.MODULE$.apply(blockManager.shuffleServerId(), partitionLengths);
   }
 
diff --git a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
index 6a0a89e81c32..744c3008ca50 100644
--- a/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
+++ b/core/src/main/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriter.java
@@ -41,7 +41,7 @@
 import org.apache.spark.executor.ShuffleWriteMetrics;
 import org.apache.spark.io.CompressionCodec;
 import org.apache.spark.io.CompressionCodec$;
-import org.apache.spark.io.LZFCompressionCodec;
+import org.apache.spark.memory.TaskMemoryManager;
 import org.apache.spark.network.util.LimitedInputStream;
 import org.apache.spark.scheduler.MapStatus;
 import org.apache.spark.scheduler.MapStatus$;
@@ -53,7 +53,7 @@
 import org.apache.spark.storage.BlockManager;
 import org.apache.spark.storage.TimeTrackingOutputStream;
 import org.apache.spark.unsafe.Platform;
-import org.apache.spark.memory.TaskMemoryManager;
+import org.apache.spark.util.Utils;
 
 @Private
 public class UnsafeShuffleWriter<K, V> extends ShuffleWriter<K, V> {
@@ -206,8 +206,10 @@ void closeAndWriteOutput() throws IOException {
     final SpillInfo[] spills = sorter.closeAndGetSpills();
     sorter = null;
     final long[] partitionLengths;
+    final File output = shuffleBlockResolver.getDataFile(shuffleId, mapId);
+    final File tmp = Utils.tempFileWith(output);
     try {
-      partitionLengths = mergeSpills(spills);
+      partitionLengths = mergeSpills(spills, tmp);
     } finally {
       for (SpillInfo spill : spills) {
         if (spill.file.exists() && ! spill.file.delete()) {
@@ -215,7 +217,7 @@ void closeAndWriteOutput() throws IOException {
         }
       }
     }
-    shuffleBlockResolver.writeIndexFile(shuffleId, mapId, partitionLengths);
+    shuffleBlockResolver.writeIndexFileAndCommit(shuffleId, mapId, partitionLengths, tmp);
     mapStatus = MapStatus$.MODULE$.apply(blockManager.shuffleServerId(), partitionLengths);
   }
 
@@ -248,8 +250,7 @@ void forceSorterToSpill() throws IOException {
    *
    * @return the partition lengths in the merged file.
    */
-  private long[] mergeSpills(SpillInfo[] spills) throws IOException {
-    final File outputFile = shuffleBlockResolver.getDataFile(shuffleId, mapId);
+  private long[] mergeSpills(SpillInfo[] spills, File outputFile) throws IOException {
     final boolean compressionEnabled = sparkConf.getBoolean("spark.shuffle.compress", true);
     final CompressionCodec compressionCodec = CompressionCodec$.MODULE$.createCodec(sparkConf);
     final boolean fastMergeEnabled =
diff --git a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
index cd253a78c2b1..39fadd878351 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
@@ -21,13 +21,13 @@ import java.util.concurrent.ConcurrentLinkedQueue
 
 import scala.collection.JavaConverters._
 
-import org.apache.spark.{Logging, SparkConf, SparkEnv}
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
 import org.apache.spark.network.netty.SparkTransportConf
 import org.apache.spark.serializer.Serializer
 import org.apache.spark.storage._
-import org.apache.spark.util.{MetadataCleaner, MetadataCleanerType, TimeStampedHashMap}
+import org.apache.spark.util.{MetadataCleaner, MetadataCleanerType, TimeStampedHashMap, Utils}
+import org.apache.spark.{Logging, SparkConf, SparkEnv}
 
 /** A group of writers for a ShuffleMapTask, one writer per reducer. */
 private[spark] trait ShuffleWriterGroup {
@@ -84,17 +84,8 @@ private[spark] class FileShuffleBlockResolver(conf: SparkConf)
         Array.tabulate[DiskBlockObjectWriter](numReducers) { bucketId =>
           val blockId = ShuffleBlockId(shuffleId, mapId, bucketId)
           val blockFile = blockManager.diskBlockManager.getFile(blockId)
-          // Because of previous failures, the shuffle file may already exist on this machine.
-          // If so, remove it.
-          if (blockFile.exists) {
-            if (blockFile.delete()) {
-              logInfo(s"Removed existing shuffle file $blockFile")
-            } else {
-              logWarning(s"Failed to remove existing shuffle file $blockFile")
-            }
-          }
-          blockManager.getDiskWriter(blockId, blockFile, serializerInstance, bufferSize,
-            writeMetrics)
+          val tmp = Utils.tempFileWith(blockFile)
+          blockManager.getDiskWriter(blockId, tmp, serializerInstance, bufferSize, writeMetrics)
         }
       }
       // Creating the file to write to and creating a disk writer both involve interacting with
diff --git a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
index 5e4c2b5d0a5c..05b1eed7f3be 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
@@ -21,13 +21,12 @@ import java.io._
 
 import com.google.common.io.ByteStreams
 
-import org.apache.spark.{SparkConf, SparkEnv, Logging}
 import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
 import org.apache.spark.network.netty.SparkTransportConf
+import org.apache.spark.shuffle.IndexShuffleBlockResolver.NOOP_REDUCE_ID
 import org.apache.spark.storage._
 import org.apache.spark.util.Utils
-
-import IndexShuffleBlockResolver.NOOP_REDUCE_ID
+import org.apache.spark.{SparkEnv, Logging, SparkConf}
 
 /**
  * Create and maintain the shuffle blocks' mapping between logic block and physical file location.
@@ -40,10 +39,13 @@ import IndexShuffleBlockResolver.NOOP_REDUCE_ID
  */
 // Note: Changes to the format in this file should be kept in sync with
 // org.apache.spark.network.shuffle.ExternalShuffleBlockResolver#getSortBasedShuffleBlockData().
-private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleBlockResolver
+private[spark] class IndexShuffleBlockResolver(
+    conf: SparkConf,
+    _blockManager: BlockManager = null)
+  extends ShuffleBlockResolver
   with Logging {
 
-  private lazy val blockManager = SparkEnv.get.blockManager
+  private lazy val blockManager = Option(_blockManager).getOrElse(SparkEnv.get.blockManager)
 
   private val transportConf = SparkTransportConf.fromSparkConf(conf)
 
@@ -74,14 +76,69 @@ private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleB
     }
   }
 
+  /**
+   * Check whether the given index and data files match each other.
+   * If so, return the partition lengths in the data file. Otherwise return null.
+   */
+  private def checkIndexAndDataFile(index: File, data: File, blocks: Int): Array[Long] = {
+    // the index file should have `block + 1` longs as offset.
+    if (index.length() != (blocks + 1) * 8) {
+      return null
+    }
+    val lengths = new Array[Long](blocks)
+    // Read the lengths of blocks
+    val in = try {
+      new DataInputStream(new BufferedInputStream(new FileInputStream(index)))
+    } catch {
+      case e: IOException =>
+        return null
+    }
+    try {
+      // Convert the offsets into lengths of each block
+      var offset = in.readLong()
+      if (offset != 0L) {
+        return null
+      }
+      var i = 0
+      while (i < blocks) {
+        val off = in.readLong()
+        lengths(i) = off - offset
+        offset = off
+        i += 1
+      }
+    } catch {
+      case e: IOException =>
+        return null
+    } finally {
+      in.close()
+    }
+
+    // the size of data file should match with index file
+    if (data.length() == lengths.sum) {
+      lengths
+    } else {
+      null
+    }
+  }
+
   /**
    * Write an index file with the offsets of each block, plus a final offset at the end for the
    * end of the output file. This will be used by getBlockData to figure out where each block
    * begins and ends.
+   *
+   * It will commit the data and index file as an atomic operation, use the existing ones, or
+   * replace them with new ones.
+   *
+   * Note: the `lengths` will be updated to match the existing index file if use the existing ones.
    * */
-  def writeIndexFile(shuffleId: Int, mapId: Int, lengths: Array[Long]): Unit = {
+  def writeIndexFileAndCommit(
+      shuffleId: Int,
+      mapId: Int,
+      lengths: Array[Long],
+      dataTmp: File): Unit = {
     val indexFile = getIndexFile(shuffleId, mapId)
-    val out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(indexFile)))
+    val indexTmp = Utils.tempFileWith(indexFile)
+    val out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(indexTmp)))
     Utils.tryWithSafeFinally {
       // We take in lengths of each block, need to convert it to offsets.
       var offset = 0L
@@ -93,6 +150,37 @@ private[spark] class IndexShuffleBlockResolver(conf: SparkConf) extends ShuffleB
     } {
       out.close()
     }
+
+    val dataFile = getDataFile(shuffleId, mapId)
+    // There is only one IndexShuffleBlockResolver per executor, this synchronization make sure
+    // the following check and rename are atomic.
+    synchronized {
+      val existingLengths = checkIndexAndDataFile(indexFile, dataFile, lengths.length)
+      if (existingLengths != null) {
+        // Another attempt for the same task has already written our map outputs successfully,
+        // so just use the existing partition lengths and delete our temporary map outputs.
+        System.arraycopy(existingLengths, 0, lengths, 0, lengths.length)
+        if (dataTmp != null && dataTmp.exists()) {
+          dataTmp.delete()
+        }
+        indexTmp.delete()
+      } else {
+        // This is the first successful attempt in writing the map outputs for this task,
+        // so override any existing index and data files with the ones we wrote.
+        if (indexFile.exists()) {
+          indexFile.delete()
+        }
+        if (dataFile.exists()) {
+          dataFile.delete()
+        }
+        if (!indexTmp.renameTo(indexFile)) {
+          throw new IOException("fail to rename file " + indexTmp + " to " + indexFile)
+        }
+        if (dataTmp != null && dataTmp.exists() && !dataTmp.renameTo(dataFile)) {
+          throw new IOException("fail to rename file " + dataTmp + " to " + dataFile)
+        }
+      }
+    }
   }
 
   override def getBlockData(blockId: ShuffleBlockId): ManagedBuffer = {
diff --git a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleWriter.scala b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleWriter.scala
index 41df70c602c3..412bf70000da 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleWriter.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/hash/HashShuffleWriter.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.shuffle.hash
 
+import java.io.IOException
+
 import org.apache.spark._
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.scheduler.MapStatus
@@ -106,6 +108,29 @@ private[spark] class HashShuffleWriter[K, V](
       writer.commitAndClose()
       writer.fileSegment().length
     }
+    // rename all shuffle files to final paths
+    // Note: there is only one ShuffleBlockResolver in executor
+    shuffleBlockResolver.synchronized {
+      shuffle.writers.zipWithIndex.foreach { case (writer, i) =>
+        val output = blockManager.diskBlockManager.getFile(writer.blockId)
+        if (sizes(i) > 0) {
+          if (output.exists()) {
+            // Use length of existing file and delete our own temporary one
+            sizes(i) = output.length()
+            writer.file.delete()
+          } else {
+            // Commit by renaming our temporary file to something the fetcher expects
+            if (!writer.file.renameTo(output)) {
+              throw new IOException(s"fail to rename ${writer.file} to $output")
+            }
+          }
+        } else {
+          if (output.exists()) {
+            output.delete()
+          }
+        }
+      }
+    }
     MapStatus(blockManager.shuffleServerId, sizes)
   }
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
index 808317b017a0..f83cf8859e58 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/sort/SortShuffleWriter.scala
@@ -20,8 +20,9 @@ package org.apache.spark.shuffle.sort
 import org.apache.spark._
 import org.apache.spark.executor.ShuffleWriteMetrics
 import org.apache.spark.scheduler.MapStatus
-import org.apache.spark.shuffle.{IndexShuffleBlockResolver, ShuffleWriter, BaseShuffleHandle}
+import org.apache.spark.shuffle.{BaseShuffleHandle, IndexShuffleBlockResolver, ShuffleWriter}
 import org.apache.spark.storage.ShuffleBlockId
+import org.apache.spark.util.Utils
 import org.apache.spark.util.collection.ExternalSorter
 
 private[spark] class SortShuffleWriter[K, V, C](
@@ -65,11 +66,11 @@ private[spark] class SortShuffleWriter[K, V, C](
     // Don't bother including the time to open the merged output file in the shuffle write time,
     // because it just opens a single file, so is typically too fast to measure accurately
     // (see SPARK-3570).
-    val outputFile = shuffleBlockResolver.getDataFile(dep.shuffleId, mapId)
+    val output = shuffleBlockResolver.getDataFile(dep.shuffleId, mapId)
+    val tmp = Utils.tempFileWith(output)
     val blockId = ShuffleBlockId(dep.shuffleId, mapId, IndexShuffleBlockResolver.NOOP_REDUCE_ID)
-    val partitionLengths = sorter.writePartitionedFile(blockId, outputFile)
-    shuffleBlockResolver.writeIndexFile(dep.shuffleId, mapId, partitionLengths)
-
+    val partitionLengths = sorter.writePartitionedFile(blockId, tmp)
+    shuffleBlockResolver.writeIndexFileAndCommit(dep.shuffleId, mapId, partitionLengths, tmp)
     mapStatus = MapStatus(blockManager.shuffleServerId, partitionLengths)
   }
 
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index c374b9376622..661c706af32b 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -21,10 +21,10 @@ import java.io._
 import java.nio.{ByteBuffer, MappedByteBuffer}
 
 import scala.collection.mutable.{ArrayBuffer, HashMap}
-import scala.concurrent.{ExecutionContext, Await, Future}
 import scala.concurrent.duration._
-import scala.util.control.NonFatal
+import scala.concurrent.{Await, ExecutionContext, Future}
 import scala.util.Random
+import scala.util.control.NonFatal
 
 import sun.nio.ch.DirectBuffer
 
@@ -38,9 +38,8 @@ import org.apache.spark.network.netty.SparkTransportConf
 import org.apache.spark.network.shuffle.ExternalShuffleClient
 import org.apache.spark.network.shuffle.protocol.ExecutorShuffleInfo
 import org.apache.spark.rpc.RpcEnv
-import org.apache.spark.serializer.{SerializerInstance, Serializer}
+import org.apache.spark.serializer.{Serializer, SerializerInstance}
 import org.apache.spark.shuffle.ShuffleManager
-import org.apache.spark.shuffle.hash.HashShuffleManager
 import org.apache.spark.util._
 
 private[spark] sealed trait BlockValues
@@ -660,7 +659,7 @@ private[spark] class BlockManager(
     val compressStream: OutputStream => OutputStream = wrapForCompression(blockId, _)
     val syncWrites = conf.getBoolean("spark.shuffle.sync", false)
     new DiskBlockObjectWriter(file, serializerInstance, bufferSize, compressStream,
-      syncWrites, writeMetrics)
+      syncWrites, writeMetrics, blockId)
   }
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala b/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
index 80d426fadc65..e2dd80f24393 100644
--- a/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
+++ b/core/src/main/scala/org/apache/spark/storage/DiskBlockObjectWriter.scala
@@ -34,14 +34,15 @@ import org.apache.spark.util.Utils
  * reopened again.
  */
 private[spark] class DiskBlockObjectWriter(
-    file: File,
+    val file: File,
     serializerInstance: SerializerInstance,
     bufferSize: Int,
     compressStream: OutputStream => OutputStream,
     syncWrites: Boolean,
     // These write metrics concurrently shared with other active DiskBlockObjectWriters who
     // are themselves performing writes. All updates must be relative.
-    writeMetrics: ShuffleWriteMetrics)
+    writeMetrics: ShuffleWriteMetrics,
+    val blockId: BlockId = null)
   extends OutputStream
   with Logging {
 
diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 316c194ff345..1b3acb8ef7f5 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -21,8 +21,8 @@ import java.io._
 import java.lang.management.ManagementFactory
 import java.net._
 import java.nio.ByteBuffer
-import java.util.{Properties, Locale, Random, UUID}
 import java.util.concurrent._
+import java.util.{Locale, Properties, Random, UUID}
 import javax.net.ssl.HttpsURLConnection
 
 import scala.collection.JavaConverters._
@@ -30,7 +30,7 @@ import scala.collection.Map
 import scala.collection.mutable.ArrayBuffer
 import scala.io.Source
 import scala.reflect.ClassTag
-import scala.util.{Failure, Success, Try}
+import scala.util.Try
 import scala.util.control.{ControlThrowable, NonFatal}
 
 import com.google.common.io.{ByteStreams, Files}
@@ -42,7 +42,6 @@ import org.apache.hadoop.security.UserGroupInformation
 import org.apache.log4j.PropertyConfigurator
 import org.eclipse.jetty.util.MultiException
 import org.json4s._
-
 import tachyon.TachyonURI
 import tachyon.client.{TachyonFS, TachyonFile}
 
@@ -2169,6 +2168,13 @@ private[spark] object Utils extends Logging {
     val resource = createResource
     try f.apply(resource) finally resource.close()
   }
+
+  /**
+   * Returns a path of temporary file which is in the same directory with `path`.
+   */
+  def tempFileWith(path: File): File = {
+    new File(path.getAbsolutePath + "." + UUID.randomUUID())
+  }
 }
 
 /**
diff --git a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
index bd6844d045ca..2440139ac95e 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/ExternalSorter.scala
@@ -638,7 +638,6 @@ private[spark] class ExternalSorter[K, V, C](
    * called by the SortShuffleWriter.
    *
    * @param blockId block ID to write to. The index file will be blockId.name + ".index".
-   * @param context a TaskContext for a running Spark task, for us to update shuffle metrics.
    * @return array of lengths, in bytes, of each partition of the file (used by map output tracker)
    */
   def writePartitionedFile(
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/IndexShuffleBlockResolverSuite.scala b/core/src/test/java/org/apache/spark/shuffle/sort/IndexShuffleBlockResolverSuite.scala
new file mode 100644
index 000000000000..0b19861fc41e
--- /dev/null
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/IndexShuffleBlockResolverSuite.scala
@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.shuffle.sort
+
+import java.io.{File, FileInputStream, FileOutputStream}
+
+import org.mockito.Answers.RETURNS_SMART_NULLS
+import org.mockito.Matchers._
+import org.mockito.Mockito._
+import org.mockito.invocation.InvocationOnMock
+import org.mockito.stubbing.Answer
+import org.mockito.{Mock, MockitoAnnotations}
+import org.scalatest.BeforeAndAfterEach
+
+import org.apache.spark.shuffle.IndexShuffleBlockResolver
+import org.apache.spark.storage._
+import org.apache.spark.util.Utils
+import org.apache.spark.{SparkConf, SparkFunSuite}
+
+
+class IndexShuffleBlockResolverSuite extends SparkFunSuite with BeforeAndAfterEach {
+
+  @Mock(answer = RETURNS_SMART_NULLS) private var blockManager: BlockManager = _
+  @Mock(answer = RETURNS_SMART_NULLS) private var diskBlockManager: DiskBlockManager = _
+
+  private var tempDir: File = _
+  private val conf: SparkConf = new SparkConf(loadDefaults = false)
+
+  override def beforeEach(): Unit = {
+    tempDir = Utils.createTempDir()
+    MockitoAnnotations.initMocks(this)
+
+    when(blockManager.diskBlockManager).thenReturn(diskBlockManager)
+    when(diskBlockManager.getFile(any[BlockId])).thenAnswer(
+      new Answer[File] {
+        override def answer(invocation: InvocationOnMock): File = {
+          new File(tempDir, invocation.getArguments.head.toString)
+        }
+      })
+  }
+
+  override def afterEach(): Unit = {
+    Utils.deleteRecursively(tempDir)
+  }
+
+  test("commit shuffle files multiple times") {
+    val lengths = Array[Long](10, 0, 20)
+    val resolver = new IndexShuffleBlockResolver(conf, blockManager)
+    val dataTmp = File.createTempFile("shuffle", null, tempDir)
+    val out = new FileOutputStream(dataTmp)
+    out.write(new Array[Byte](30))
+    out.close()
+    resolver.writeIndexFileAndCommit(1, 2, lengths, dataTmp)
+
+    val dataFile = resolver.getDataFile(1, 2)
+    assert(dataFile.exists())
+    assert(dataFile.length() === 30)
+    assert(!dataTmp.exists())
+
+    val dataTmp2 = File.createTempFile("shuffle", null, tempDir)
+    val out2 = new FileOutputStream(dataTmp2)
+    val lengths2 = new Array[Long](3)
+    out2.write(Array[Byte](1))
+    out2.write(new Array[Byte](29))
+    out2.close()
+    resolver.writeIndexFileAndCommit(1, 2, lengths2, dataTmp2)
+    assert(lengths2.toSeq === lengths.toSeq)
+    assert(dataFile.exists())
+    assert(dataFile.length() === 30)
+    assert(!dataTmp2.exists())
+
+    // The dataFile should be the previous one
+    val in = new FileInputStream(dataFile)
+    val firstByte = new Array[Byte](1)
+    in.read(firstByte)
+    assert(firstByte(0) === 0)
+
+    // remove data file
+    dataFile.delete()
+
+    val dataTmp3 = File.createTempFile("shuffle", null, tempDir)
+    val out3 = new FileOutputStream(dataTmp3)
+    val lengths3 = Array[Long](10, 10, 15)
+    out3.write(Array[Byte](2))
+    out3.write(new Array[Byte](34))
+    out3.close()
+    resolver.writeIndexFileAndCommit(1, 2, lengths3, dataTmp3)
+    assert(lengths3.toSeq != lengths.toSeq)
+    assert(dataFile.exists())
+    assert(dataFile.length() === 35)
+    assert(!dataTmp2.exists())
+
+    // The dataFile should be the previous one
+    val in2 = new FileInputStream(dataFile)
+    val firstByte2 = new Array[Byte](1)
+    in2.read(firstByte2)
+    assert(firstByte2(0) === 2)
+  }
+}
diff --git a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
index 0e0eca515afc..bc85918c59aa 100644
--- a/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
+++ b/core/src/test/java/org/apache/spark/shuffle/sort/UnsafeShuffleWriterSuite.java
@@ -130,7 +130,8 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
           (Integer) args[3],
           new CompressStream(),
           false,
-          (ShuffleWriteMetrics) args[4]
+          (ShuffleWriteMetrics) args[4],
+          (BlockId) args[0]
         );
       }
     });
@@ -169,9 +170,13 @@ public OutputStream answer(InvocationOnMock invocation) throws Throwable {
       @Override
       public Void answer(InvocationOnMock invocationOnMock) throws Throwable {
         partitionSizesInMergedFile = (long[]) invocationOnMock.getArguments()[2];
+        File tmp = (File) invocationOnMock.getArguments()[3];
+        mergedOutputFile.delete();
+        tmp.renameTo(mergedOutputFile);
         return null;
       }
-    }).when(shuffleBlockResolver).writeIndexFile(anyInt(), anyInt(), any(long[].class));
+    }).when(shuffleBlockResolver)
+      .writeIndexFileAndCommit(anyInt(), anyInt(), any(long[].class), any(File.class));
 
     when(diskBlockManager.createTempShuffleBlock()).thenAnswer(
       new Answer<Tuple2<TempShuffleBlockId, File>>() {
diff --git a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
index 3bca790f3087..d87a1d2a56d9 100644
--- a/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
+++ b/core/src/test/java/org/apache/spark/unsafe/map/AbstractBytesToBytesMapSuite.java
@@ -117,7 +117,8 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
           (Integer) args[3],
           new CompressStream(),
           false,
-          (ShuffleWriteMetrics) args[4]
+          (ShuffleWriteMetrics) args[4],
+          (BlockId) args[0]
         );
       }
     });
diff --git a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
index 11c3a7be3887..a1c9f6fab8e6 100644
--- a/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
+++ b/core/src/test/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorterSuite.java
@@ -130,7 +130,8 @@ public DiskBlockObjectWriter answer(InvocationOnMock invocationOnMock) throws Th
           (Integer) args[3],
           new CompressStream(),
           false,
-          (ShuffleWriteMetrics) args[4]
+          (ShuffleWriteMetrics) args[4],
+          (BlockId) args[0]
         );
       }
     });
diff --git a/core/src/test/scala/org/apache/spark/ShuffleSuite.scala b/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
index 4a0877d86f2c..0de10ae48537 100644
--- a/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ShuffleSuite.scala
@@ -17,12 +17,16 @@
 
 package org.apache.spark
 
+import java.util.concurrent.{Callable, Executors, ExecutorService, CyclicBarrier}
+
 import org.scalatest.Matchers
 
 import org.apache.spark.ShuffleSuite.NonJavaSerializableClass
+import org.apache.spark.memory.TaskMemoryManager
 import org.apache.spark.rdd.{CoGroupedRDD, OrderedRDDFunctions, RDD, ShuffledRDD, SubtractedRDD}
-import org.apache.spark.scheduler.{SparkListener, SparkListenerTaskEnd}
+import org.apache.spark.scheduler.{MyRDD, MapStatus, SparkListener, SparkListenerTaskEnd}
 import org.apache.spark.serializer.KryoSerializer
+import org.apache.spark.shuffle.ShuffleWriter
 import org.apache.spark.storage.{ShuffleDataBlockId, ShuffleBlockId}
 import org.apache.spark.util.MutablePair
 
@@ -317,6 +321,107 @@ abstract class ShuffleSuite extends SparkFunSuite with Matchers with LocalSparkC
     assert(metrics.bytesWritten === metrics.byresRead)
     assert(metrics.bytesWritten > 0)
   }
+
+  test("multiple simultaneous attempts for one task (SPARK-8029)") {
+    sc = new SparkContext("local", "test", conf)
+    val mapTrackerMaster = sc.env.mapOutputTracker.asInstanceOf[MapOutputTrackerMaster]
+    val manager = sc.env.shuffleManager
+
+    val taskMemoryManager = new TaskMemoryManager(sc.env.memoryManager, 0L)
+    val metricsSystem = sc.env.metricsSystem
+    val shuffleMapRdd = new MyRDD(sc, 1, Nil)
+    val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(1))
+    val shuffleHandle = manager.registerShuffle(0, 1, shuffleDep)
+
+    // first attempt -- its successful
+    val writer1 = manager.getWriter[Int, Int](shuffleHandle, 0,
+      new TaskContextImpl(0, 0, 0L, 0, taskMemoryManager, metricsSystem,
+        InternalAccumulator.create(sc)))
+    val data1 = (1 to 10).map { x => x -> x}
+
+    // second attempt -- also successful.  We'll write out different data,
+    // just to simulate the fact that the records may get written differently
+    // depending on what gets spilled, what gets combined, etc.
+    val writer2 = manager.getWriter[Int, Int](shuffleHandle, 0,
+      new TaskContextImpl(0, 0, 1L, 0, taskMemoryManager, metricsSystem,
+        InternalAccumulator.create(sc)))
+    val data2 = (11 to 20).map { x => x -> x}
+
+    // interleave writes of both attempts -- we want to test that both attempts can occur
+    // simultaneously, and everything is still OK
+
+    def writeAndClose(
+      writer: ShuffleWriter[Int, Int])(
+      iter: Iterator[(Int, Int)]): Option[MapStatus] = {
+      val files = writer.write(iter)
+      writer.stop(true)
+    }
+    val interleaver = new InterleaveIterators(
+      data1, writeAndClose(writer1), data2, writeAndClose(writer2))
+    val (mapOutput1, mapOutput2) = interleaver.run()
+
+    // check that we can read the map output and it has the right data
+    assert(mapOutput1.isDefined)
+    assert(mapOutput2.isDefined)
+    assert(mapOutput1.get.location === mapOutput2.get.location)
+    assert(mapOutput1.get.getSizeForBlock(0) === mapOutput1.get.getSizeForBlock(0))
+
+    // register one of the map outputs -- doesn't matter which one
+    mapOutput1.foreach { case mapStatus =>
+      mapTrackerMaster.registerMapOutputs(0, Array(mapStatus))
+    }
+
+    val reader = manager.getReader[Int, Int](shuffleHandle, 0, 1,
+      new TaskContextImpl(1, 0, 2L, 0, taskMemoryManager, metricsSystem,
+        InternalAccumulator.create(sc)))
+    val readData = reader.read().toIndexedSeq
+    assert(readData === data1.toIndexedSeq || readData === data2.toIndexedSeq)
+
+    manager.unregisterShuffle(0)
+  }
+}
+
+/**
+ * Utility to help tests make sure that we can process two different iterators simultaneously
+ * in different threads.  This makes sure that in your test, you don't completely process data1 with
+ * f1 before processing data2 with f2 (or vice versa).  It adds a barrier so that the functions only
+ * process one element, before pausing to wait for the other function to "catch up".
+ */
+class InterleaveIterators[T, R](
+  data1: Seq[T],
+  f1: Iterator[T] => R,
+  data2: Seq[T],
+  f2: Iterator[T] => R) {
+
+  require(data1.size == data2.size)
+
+  val barrier = new CyclicBarrier(2)
+  class BarrierIterator[E](id: Int, sub: Iterator[E]) extends Iterator[E] {
+    def hasNext: Boolean = sub.hasNext
+
+    def next: E = {
+      barrier.await()
+      sub.next()
+    }
+  }
+
+  val c1 = new Callable[R] {
+    override def call(): R = f1(new BarrierIterator(1, data1.iterator))
+  }
+  val c2 = new Callable[R] {
+    override def call(): R = f2(new BarrierIterator(2, data2.iterator))
+  }
+
+  val e: ExecutorService = Executors.newFixedThreadPool(2)
+
+  def run(): (R, R) = {
+    val future1 = e.submit(c1)
+    val future2 = e.submit(c2)
+    val r1 = future1.get()
+    val r2 = future2.get()
+    e.shutdown()
+    (r1, r2)
+  }
 }
 
 object ShuffleSuite {
diff --git a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
index b92a302806f7..d3b1b2b620b4 100644
--- a/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/shuffle/sort/BypassMergeSortShuffleWriterSuite.scala
@@ -68,6 +68,17 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
     when(dependency.serializer).thenReturn(Some(new JavaSerializer(conf)))
     when(taskContext.taskMetrics()).thenReturn(taskMetrics)
     when(blockResolver.getDataFile(0, 0)).thenReturn(outputFile)
+    doAnswer(new Answer[Void] {
+      def answer(invocationOnMock: InvocationOnMock): Void = {
+        val tmp: File = invocationOnMock.getArguments()(3).asInstanceOf[File]
+        if (tmp != null) {
+          outputFile.delete
+          tmp.renameTo(outputFile)
+        }
+        null
+      }
+    }).when(blockResolver)
+      .writeIndexFileAndCommit(anyInt, anyInt, any(classOf[Array[Long]]), any(classOf[File]))
     when(blockManager.diskBlockManager).thenReturn(diskBlockManager)
     when(blockManager.getDiskWriter(
       any[BlockId],
@@ -84,7 +95,8 @@ class BypassMergeSortShuffleWriterSuite extends SparkFunSuite with BeforeAndAfte
           args(3).asInstanceOf[Int],
           compressStream = identity,
           syncWrites = false,
-          args(4).asInstanceOf[ShuffleWriteMetrics]
+          args(4).asInstanceOf[ShuffleWriteMetrics],
+          blockId = args(0).asInstanceOf[BlockId]
         )
       }
     })

From ec80c0c2fc63360ee6b5872c24e6c67779ac63f4 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Fri, 13 Nov 2015 00:30:27 -0800
Subject: [PATCH 669/896] [SPARK-11706][STREAMING] Fix the bug that Streaming
 Python tests cannot report failures

This PR just checks the test results and returns 1 if the test fails, so that `run-tests.py` can mark it fail.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9669 from zsxwing/streaming-python-tests.
---
 .../streaming/flume/FlumeTestUtils.scala      |  5 ++--
 .../flume/PollingFlumeTestUtils.scala         |  9 +++---
 .../flume/FlumePollingStreamSuite.scala       |  2 +-
 .../streaming/flume/FlumeStreamSuite.scala    |  2 +-
 python/pyspark/streaming/tests.py             | 30 ++++++++++++-------
 5 files changed, 30 insertions(+), 18 deletions(-)

diff --git a/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumeTestUtils.scala b/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumeTestUtils.scala
index 70018c86f92b..fe5dcc8e4b9d 100644
--- a/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumeTestUtils.scala
+++ b/external/flume/src/main/scala/org/apache/spark/streaming/flume/FlumeTestUtils.scala
@@ -19,6 +19,7 @@ package org.apache.spark.streaming.flume
 
 import java.net.{InetSocketAddress, ServerSocket}
 import java.nio.ByteBuffer
+import java.util.{List => JList}
 import java.util.Collections
 
 import scala.collection.JavaConverters._
@@ -59,10 +60,10 @@ private[flume] class FlumeTestUtils {
   }
 
   /** Send data to the flume receiver */
-  def writeInput(input: Seq[String], enableCompression: Boolean): Unit = {
+  def writeInput(input: JList[String], enableCompression: Boolean): Unit = {
     val testAddress = new InetSocketAddress("localhost", testPort)
 
-    val inputEvents = input.map { item =>
+    val inputEvents = input.asScala.map { item =>
       val event = new AvroFlumeEvent
       event.setBody(ByteBuffer.wrap(item.getBytes(UTF_8)))
       event.setHeaders(Collections.singletonMap("test", "header"))
diff --git a/external/flume/src/main/scala/org/apache/spark/streaming/flume/PollingFlumeTestUtils.scala b/external/flume/src/main/scala/org/apache/spark/streaming/flume/PollingFlumeTestUtils.scala
index a2ab320957db..bfe7548d4f50 100644
--- a/external/flume/src/main/scala/org/apache/spark/streaming/flume/PollingFlumeTestUtils.scala
+++ b/external/flume/src/main/scala/org/apache/spark/streaming/flume/PollingFlumeTestUtils.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.streaming.flume
 
 import java.util.concurrent._
-import java.util.{Map => JMap, Collections}
+import java.util.{Collections, List => JList, Map => JMap}
 
 import scala.collection.mutable.ArrayBuffer
 
@@ -137,7 +137,8 @@ private[flume] class PollingFlumeTestUtils {
   /**
    * A Python-friendly method to assert the output
    */
-  def assertOutput(outputHeaders: Seq[JMap[String, String]], outputBodies: Seq[String]): Unit = {
+  def assertOutput(
+      outputHeaders: JList[JMap[String, String]], outputBodies: JList[String]): Unit = {
     require(outputHeaders.size == outputBodies.size)
     val eventSize = outputHeaders.size
     if (eventSize != totalEventsPerChannel * channels.size) {
@@ -151,8 +152,8 @@ private[flume] class PollingFlumeTestUtils {
       var found = false
       var j = 0
       while (j < eventSize && !found) {
-        if (eventBodyToVerify == outputBodies(j) &&
-          eventHeaderToVerify == outputHeaders(j)) {
+        if (eventBodyToVerify == outputBodies.get(j) &&
+          eventHeaderToVerify == outputHeaders.get(j)) {
           found = true
           counter += 1
         }
diff --git a/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumePollingStreamSuite.scala b/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumePollingStreamSuite.scala
index ff2fb8eed204..5fd2711f5f7d 100644
--- a/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumePollingStreamSuite.scala
+++ b/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumePollingStreamSuite.scala
@@ -120,7 +120,7 @@ class FlumePollingStreamSuite extends SparkFunSuite with BeforeAndAfter with Log
           case (key, value) => (key.toString, value.toString)
         }).map(_.asJava)
         val bodies = flattenOutputBuffer.map(e => new String(e.event.getBody.array(), UTF_8))
-        utils.assertOutput(headers, bodies)
+        utils.assertOutput(headers.asJava, bodies.asJava)
       }
     } finally {
       ssc.stop()
diff --git a/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumeStreamSuite.scala b/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumeStreamSuite.scala
index 5ffb60bd602f..f315e0a7ca23 100644
--- a/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumeStreamSuite.scala
+++ b/external/flume/src/test/scala/org/apache/spark/streaming/flume/FlumeStreamSuite.scala
@@ -54,7 +54,7 @@ class FlumeStreamSuite extends SparkFunSuite with BeforeAndAfter with Matchers w
       val outputBuffer = startContext(utils.getTestPort(), testCompression)
 
       eventually(timeout(10 seconds), interval(100 milliseconds)) {
-        utils.writeInput(input, testCompression)
+        utils.writeInput(input.asJava, testCompression)
       }
 
       eventually(timeout(10 seconds), interval(100 milliseconds)) {
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 179479625bca..6ee864d8d3da 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -611,12 +611,16 @@ class CheckpointTests(unittest.TestCase):
     @staticmethod
     def tearDownClass():
         # Clean up in the JVM just in case there has been some issues in Python API
-        jStreamingContextOption = StreamingContext._jvm.SparkContext.getActive()
-        if jStreamingContextOption.nonEmpty():
-            jStreamingContextOption.get().stop()
-        jSparkContextOption = SparkContext._jvm.SparkContext.get()
-        if jSparkContextOption.nonEmpty():
-            jSparkContextOption.get().stop()
+        if SparkContext._jvm is not None:
+            jStreamingContextOption = \
+                SparkContext._jvm.org.apache.spark.streaming.StreamingContext.getActive()
+            if jStreamingContextOption.nonEmpty():
+                jStreamingContextOption.get().stop()
+
+    def setUp(self):
+        self.ssc = None
+        self.sc = None
+        self.cpd = None
 
     def tearDown(self):
         if self.ssc is not None:
@@ -626,6 +630,7 @@ def tearDown(self):
         if self.cpd is not None:
             shutil.rmtree(self.cpd)
 
+    @unittest.skip("Enable it when we fix the checkpoint bug")
     def test_get_or_create_and_get_active_or_create(self):
         inputd = tempfile.mkdtemp()
         outputd = tempfile.mkdtemp() + "/"
@@ -648,7 +653,7 @@ def setup():
         self.cpd = tempfile.mkdtemp("test_streaming_cps")
         self.setupCalled = False
         self.ssc = StreamingContext.getOrCreate(self.cpd, setup)
-        self.assertFalse(self.setupCalled)
+        self.assertTrue(self.setupCalled)
 
         self.ssc.start()
 
@@ -1322,11 +1327,16 @@ def search_kinesis_asl_assembly_jar():
             "or 'build/mvn -Pkinesis-asl package' before running this test.")
 
     sys.stderr.write("Running tests: %s \n" % (str(testcases)))
+    failed = False
     for testcase in testcases:
         sys.stderr.write("[Running %s]\n" % (testcase))
         tests = unittest.TestLoader().loadTestsFromTestCase(testcase)
         if xmlrunner:
-            unittest.main(tests, verbosity=3,
-                          testRunner=xmlrunner.XMLTestRunner(output='target/test-reports'))
+            result = xmlrunner.XMLTestRunner(output='target/test-reports', verbosity=3).run(tests)
+            if not result.wasSuccessful():
+                failed = True
         else:
-            unittest.TextTestRunner(verbosity=3).run(tests)
+            result = unittest.TextTestRunner(verbosity=3).run(tests)
+            if not result.wasSuccessful():
+                failed = True
+    sys.exit(failed)

From 7b5d9051cf91c099458d092a6705545899134b3b Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Fri, 13 Nov 2015 18:36:56 +0800
Subject: [PATCH 670/896] [SPARK-11678][SQL] Partition discovery should stop at
 the root path of the table.

https://issues.apache.org/jira/browse/SPARK-11678

The change of this PR is to pass root paths of table to the partition discovery logic. So, the process of partition discovery stops at those root paths instead of going all the way to the root path of the file system.

Author: Yin Huai <yhuai@databricks.com>

Closes #9651 from yhuai/SPARK-11678.
---
 .../datasources/PartitioningUtils.scala       |  68 ++++++---
 .../datasources/json/JSONRelation.scala       |  21 +--
 .../datasources/parquet/ParquetRelation.scala |   2 +-
 .../datasources/text/DefaultSource.scala      |   5 +-
 .../apache/spark/sql/sources/interfaces.scala |  49 ++++++-
 .../parquet/ParquetFilterSuite.scala          |   4 +-
 .../ParquetPartitionDiscoverySuite.scala      | 132 ++++++++++++++++--
 .../spark/sql/hive/orc/OrcRelation.scala      |   2 +-
 .../sql/sources/SimpleTextRelation.scala      |   2 +-
 .../sql/sources/hadoopFsRelationSuites.scala  |   1 +
 10 files changed, 235 insertions(+), 51 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
index 86bc3a1b6dab..81962f8d6378 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
@@ -75,10 +75,11 @@ private[sql] object PartitioningUtils {
   private[sql] def parsePartitions(
       paths: Seq[Path],
       defaultPartitionName: String,
-      typeInference: Boolean): PartitionSpec = {
+      typeInference: Boolean,
+      basePaths: Set[Path]): PartitionSpec = {
     // First, we need to parse every partition's path and see if we can find partition values.
-    val (partitionValues, optBasePaths) = paths.map { path =>
-      parsePartition(path, defaultPartitionName, typeInference)
+    val (partitionValues, optDiscoveredBasePaths) = paths.map { path =>
+      parsePartition(path, defaultPartitionName, typeInference, basePaths)
     }.unzip
 
     // We create pairs of (path -> path's partition value) here
@@ -101,11 +102,15 @@ private[sql] object PartitioningUtils {
       // It will be recognised as conflicting directory structure:
       //   "hdfs://host:9000/invalidPath"
       //   "hdfs://host:9000/path"
-      val basePaths = optBasePaths.flatMap(x => x)
+      val disvoeredBasePaths = optDiscoveredBasePaths.flatMap(x => x)
       assert(
-        basePaths.distinct.size == 1,
+        disvoeredBasePaths.distinct.size == 1,
         "Conflicting directory structures detected. Suspicious paths:\b" +
-          basePaths.distinct.mkString("\n\t", "\n\t", "\n\n"))
+          disvoeredBasePaths.distinct.mkString("\n\t", "\n\t", "\n\n") +
+          "If provided paths are partition directories, please set " +
+          "\"basePath\" in the options of the data source to specify the " +
+          "root directory of the table. If there are multiple root directories, " +
+          "please load them separately and then union them.")
 
       val resolvedPartitionValues = resolvePartitions(pathsWithPartitionValues)
 
@@ -131,7 +136,7 @@ private[sql] object PartitioningUtils {
 
   /**
    * Parses a single partition, returns column names and values of each partition column, also
-   * the base path.  For example, given:
+   * the path when we stop partition discovery.  For example, given:
    * {{{
    *   path = hdfs://<host>:<port>/path/to/partition/a=42/b=hello/c=3.14
    * }}}
@@ -144,40 +149,63 @@ private[sql] object PartitioningUtils {
    *       Literal.create("hello", StringType),
    *       Literal.create(3.14, FloatType)))
    * }}}
-   * and the base path:
+   * and the path when we stop the discovery is:
    * {{{
-   *   /path/to/partition
+   *   hdfs://<host>:<port>/path/to/partition
    * }}}
    */
   private[sql] def parsePartition(
       path: Path,
       defaultPartitionName: String,
-      typeInference: Boolean): (Option[PartitionValues], Option[Path]) = {
+      typeInference: Boolean,
+      basePaths: Set[Path]): (Option[PartitionValues], Option[Path]) = {
     val columns = ArrayBuffer.empty[(String, Literal)]
     // Old Hadoop versions don't have `Path.isRoot`
     var finished = path.getParent == null
-    var chopped = path
-    var basePath = path
+    // currentPath is the current path that we will use to parse partition column value.
+    var currentPath: Path = path
 
     while (!finished) {
       // Sometimes (e.g., when speculative task is enabled), temporary directories may be left
-      // uncleaned.  Here we simply ignore them.
-      if (chopped.getName.toLowerCase == "_temporary") {
+      // uncleaned. Here we simply ignore them.
+      if (currentPath.getName.toLowerCase == "_temporary") {
         return (None, None)
       }
 
-      val maybeColumn = parsePartitionColumn(chopped.getName, defaultPartitionName, typeInference)
-      maybeColumn.foreach(columns += _)
-      basePath = chopped
-      chopped = chopped.getParent
-      finished = (maybeColumn.isEmpty && !columns.isEmpty) || chopped.getParent == null
+      if (basePaths.contains(currentPath)) {
+        // If the currentPath is one of base paths. We should stop.
+        finished = true
+      } else {
+        // Let's say currentPath is a path of "/table/a=1/", currentPath.getName will give us a=1.
+        // Once we get the string, we try to parse it and find the partition column and value.
+        val maybeColumn =
+          parsePartitionColumn(currentPath.getName, defaultPartitionName, typeInference)
+        maybeColumn.foreach(columns += _)
+
+        // Now, we determine if we should stop.
+        // When we hit any of the following cases, we will stop:
+        //  - In this iteration, we could not parse the value of partition column and value,
+        //    i.e. maybeColumn is None, and columns is not empty. At here we check if columns is
+        //    empty to handle cases like /table/a=1/_temporary/something (we need to find a=1 in
+        //    this case).
+        //  - After we get the new currentPath, this new currentPath represent the top level dir
+        //    i.e. currentPath.getParent == null. For the example of "/table/a=1/",
+        //    the top level dir is "/table".
+        finished =
+          (maybeColumn.isEmpty && !columns.isEmpty) || currentPath.getParent == null
+
+        if (!finished) {
+          // For the above example, currentPath will be "/table/".
+          currentPath = currentPath.getParent
+        }
+      }
     }
 
     if (columns.isEmpty) {
       (None, Some(path))
     } else {
       val (columnNames, values) = columns.reverse.unzip
-      (Some(PartitionValues(columnNames, values)), Some(basePath))
+      (Some(PartitionValues(columnNames, values)), Some(currentPath))
     }
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index 85b52f04c8d0..dca638b7f67a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -56,13 +56,14 @@ class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
     val primitivesAsString = parameters.get("primitivesAsString").map(_.toBoolean).getOrElse(false)
 
     new JSONRelation(
-      None,
-      samplingRatio,
-      primitivesAsString,
-      dataSchema,
-      None,
-      partitionColumns,
-      paths)(sqlContext)
+      inputRDD = None,
+      samplingRatio = samplingRatio,
+      primitivesAsString = primitivesAsString,
+      maybeDataSchema = dataSchema,
+      maybePartitionSpec = None,
+      userDefinedPartitionColumns = partitionColumns,
+      paths = paths,
+      parameters = parameters)(sqlContext)
   }
 }
 
@@ -73,8 +74,10 @@ private[sql] class JSONRelation(
     val maybeDataSchema: Option[StructType],
     val maybePartitionSpec: Option[PartitionSpec],
     override val userDefinedPartitionColumns: Option[StructType],
-    override val paths: Array[String] = Array.empty[String])(@transient val sqlContext: SQLContext)
-  extends HadoopFsRelation(maybePartitionSpec) {
+    override val paths: Array[String] = Array.empty[String],
+    parameters: Map[String, String] = Map.empty[String, String])
+    (@transient val sqlContext: SQLContext)
+  extends HadoopFsRelation(maybePartitionSpec, parameters) {
 
   /** Constraints to be imposed on schema to be stored. */
   private def checkConstraints(schema: StructType): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index 21337b2932aa..cb0aab8cc0d0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -109,7 +109,7 @@ private[sql] class ParquetRelation(
     override val userDefinedPartitionColumns: Option[StructType],
     parameters: Map[String, String])(
     val sqlContext: SQLContext)
-  extends HadoopFsRelation(maybePartitionSpec)
+  extends HadoopFsRelation(maybePartitionSpec, parameters)
   with Logging {
 
   private[sql] def this(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
index 4b8b8e4e74da..fbd387bc2ef4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/text/DefaultSource.scala
@@ -71,9 +71,10 @@ class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
 private[sql] class TextRelation(
     val maybePartitionSpec: Option[PartitionSpec],
     override val userDefinedPartitionColumns: Option[StructType],
-    override val paths: Array[String] = Array.empty[String])
+    override val paths: Array[String] = Array.empty[String],
+    parameters: Map[String, String] = Map.empty[String, String])
     (@transient val sqlContext: SQLContext)
-  extends HadoopFsRelation(maybePartitionSpec) {
+  extends HadoopFsRelation(maybePartitionSpec, parameters) {
 
   /** Data schema is always a single column, named "text". */
   override def dataSchema: StructType = new StructType().add("value", StringType)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index 2be6cd45337f..b3d3bdf50df6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -416,12 +416,19 @@ abstract class OutputWriter {
  * @since 1.4.0
  */
 @Experimental
-abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[PartitionSpec])
+abstract class HadoopFsRelation private[sql](
+    maybePartitionSpec: Option[PartitionSpec],
+    parameters: Map[String, String])
   extends BaseRelation with FileRelation with Logging {
 
   override def toString: String = getClass.getSimpleName + paths.mkString("[", ",", "]")
 
-  def this() = this(None)
+  def this() = this(None, Map.empty[String, String])
+
+  def this(parameters: Map[String, String]) = this(None, parameters)
+
+  private[sql] def this(maybePartitionSpec: Option[PartitionSpec]) =
+    this(maybePartitionSpec, Map.empty[String, String])
 
   private val hadoopConf = new Configuration(sqlContext.sparkContext.hadoopConfiguration)
 
@@ -519,13 +526,37 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
   }
 
   /**
-   * Base paths of this relation.  For partitioned relations, it should be either root directories
+   * Paths of this relation.  For partitioned relations, it should be root directories
    * of all partition directories.
    *
    * @since 1.4.0
    */
   def paths: Array[String]
 
+  /**
+   * Contains a set of paths that are considered as the base dirs of the input datasets.
+   * The partitioning discovery logic will make sure it will stop when it reaches any
+   * base path. By default, the paths of the dataset provided by users will be base paths.
+   * For example, if a user uses `sqlContext.read.parquet("/path/something=true/")`, the base path
+   * will be `/path/something=true/`, and the returned DataFrame will not contain a column of
+   * `something`. If users want to override the basePath. They can set `basePath` in the options
+   * to pass the new base path to the data source.
+   * For the above example, if the user-provided base path is `/path/`, the returned
+   * DataFrame will have the column of `something`.
+   */
+  private def basePaths: Set[Path] = {
+    val userDefinedBasePath = parameters.get("basePath").map(basePath => Set(new Path(basePath)))
+    userDefinedBasePath.getOrElse {
+      // If the user does not provide basePath, we will just use paths.
+      val pathSet = paths.toSet
+      pathSet.map(p => new Path(p))
+    }.map { hdfsPath =>
+      // Make the path qualified (consistent with listLeafFiles and listLeafFilesInParallel).
+      val fs = hdfsPath.getFileSystem(hadoopConf)
+      hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
+    }
+  }
+
   override def inputFiles: Array[String] = cachedLeafStatuses().map(_.getPath.toString).toArray
 
   override def sizeInBytes: Long = cachedLeafStatuses().map(_.getLen).sum
@@ -559,7 +590,10 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
     userDefinedPartitionColumns match {
       case Some(userProvidedSchema) if userProvidedSchema.nonEmpty =>
         val spec = PartitioningUtils.parsePartitions(
-          leafDirs, PartitioningUtils.DEFAULT_PARTITION_NAME, typeInference = false)
+          leafDirs,
+          PartitioningUtils.DEFAULT_PARTITION_NAME,
+          typeInference = false,
+          basePaths = basePaths)
 
         // Without auto inference, all of value in the `row` should be null or in StringType,
         // we need to cast into the data type that user specified.
@@ -577,8 +611,11 @@ abstract class HadoopFsRelation private[sql](maybePartitionSpec: Option[Partitio
 
       case _ =>
         // user did not provide a partitioning schema
-        PartitioningUtils.parsePartitions(leafDirs, PartitioningUtils.DEFAULT_PARTITION_NAME,
-          typeInference = sqlContext.conf.partitionColumnTypeInferenceEnabled())
+        PartitioningUtils.parsePartitions(
+          leafDirs,
+          PartitioningUtils.DEFAULT_PARTITION_NAME,
+          typeInference = sqlContext.conf.partitionColumnTypeInferenceEnabled(),
+          basePaths = basePaths)
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 2ac87ad6cd03..458786f77af3 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -294,7 +294,7 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
         // If the "part = 1" filter gets pushed down, this query will throw an exception since
         // "part" is not a valid column in the actual Parquet file
         checkAnswer(
-          sqlContext.read.parquet(path).filter("part = 1"),
+          sqlContext.read.parquet(dir.getCanonicalPath).filter("part = 1"),
           (1 to 3).map(i => Row(i, i.toString, 1)))
       }
     }
@@ -311,7 +311,7 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
         // If the "part = 1" filter gets pushed down, this query will throw an exception since
         // "part" is not a valid column in the actual Parquet file
         checkAnswer(
-          sqlContext.read.parquet(path).filter("a > 0 and (part = 0 or a > 1)"),
+          sqlContext.read.parquet(dir.getCanonicalPath).filter("a > 0 and (part = 0 or a > 1)"),
           (2 to 3).map(i => Row(i, i.toString, 1)))
       }
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
index 61cc0da50865..71e9034d9779 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetPartitionDiscoverySuite.scala
@@ -66,7 +66,7 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       "hdfs://host:9000/path/a=10.5/b=hello")
 
     var exception = intercept[AssertionError] {
-      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true, Set.empty[Path])
     }
     assert(exception.getMessage().contains("Conflicting directory structures detected"))
 
@@ -76,7 +76,37 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       "hdfs://host:9000/path/a=10/b=20",
       "hdfs://host:9000/path/_temporary/path")
 
-    parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+    parsePartitions(
+      paths.map(new Path(_)),
+      defaultPartitionName,
+      true,
+      Set(new Path("hdfs://host:9000/path/")))
+
+    // Valid
+    paths = Seq(
+      "hdfs://host:9000/path/something=true/table/",
+      "hdfs://host:9000/path/something=true/table/_temporary",
+      "hdfs://host:9000/path/something=true/table/a=10/b=20",
+      "hdfs://host:9000/path/something=true/table/_temporary/path")
+
+    parsePartitions(
+      paths.map(new Path(_)),
+      defaultPartitionName,
+      true,
+      Set(new Path("hdfs://host:9000/path/something=true/table")))
+
+    // Valid
+    paths = Seq(
+      "hdfs://host:9000/path/table=true/",
+      "hdfs://host:9000/path/table=true/_temporary",
+      "hdfs://host:9000/path/table=true/a=10/b=20",
+      "hdfs://host:9000/path/table=true/_temporary/path")
+
+    parsePartitions(
+      paths.map(new Path(_)),
+      defaultPartitionName,
+      true,
+      Set(new Path("hdfs://host:9000/path/table=true")))
 
     // Invalid
     paths = Seq(
@@ -85,7 +115,11 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       "hdfs://host:9000/path/path1")
 
     exception = intercept[AssertionError] {
-      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+      parsePartitions(
+        paths.map(new Path(_)),
+        defaultPartitionName,
+        true,
+        Set(new Path("hdfs://host:9000/path/")))
     }
     assert(exception.getMessage().contains("Conflicting directory structures detected"))
 
@@ -101,19 +135,24 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
       "hdfs://host:9000/tmp/tables/nonPartitionedTable2")
 
     exception = intercept[AssertionError] {
-      parsePartitions(paths.map(new Path(_)), defaultPartitionName, true)
+      parsePartitions(
+        paths.map(new Path(_)),
+        defaultPartitionName,
+        true,
+        Set(new Path("hdfs://host:9000/tmp/tables/")))
     }
     assert(exception.getMessage().contains("Conflicting directory structures detected"))
   }
 
   test("parse partition") {
     def check(path: String, expected: Option[PartitionValues]): Unit = {
-      assert(expected === parsePartition(new Path(path), defaultPartitionName, true)._1)
+      val actual = parsePartition(new Path(path), defaultPartitionName, true, Set.empty[Path])._1
+      assert(expected === actual)
     }
 
     def checkThrows[T <: Throwable: Manifest](path: String, expected: String): Unit = {
       val message = intercept[T] {
-        parsePartition(new Path(path), defaultPartitionName, true)
+        parsePartition(new Path(path), defaultPartitionName, true, Set.empty[Path])
       }.getMessage
 
       assert(message.contains(expected))
@@ -152,8 +191,17 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
   }
 
   test("parse partitions") {
-    def check(paths: Seq[String], spec: PartitionSpec): Unit = {
-      assert(parsePartitions(paths.map(new Path(_)), defaultPartitionName, true) === spec)
+    def check(
+        paths: Seq[String],
+        spec: PartitionSpec,
+        rootPaths: Set[Path] = Set.empty[Path]): Unit = {
+      val actualSpec =
+        parsePartitions(
+          paths.map(new Path(_)),
+          defaultPartitionName,
+          true,
+          rootPaths)
+      assert(actualSpec === spec)
     }
 
     check(Seq(
@@ -232,7 +280,9 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
 
   test("parse partitions with type inference disabled") {
     def check(paths: Seq[String], spec: PartitionSpec): Unit = {
-      assert(parsePartitions(paths.map(new Path(_)), defaultPartitionName, false) === spec)
+      val actualSpec =
+        parsePartitions(paths.map(new Path(_)), defaultPartitionName, false, Set.empty[Path])
+      assert(actualSpec === spec)
     }
 
     check(Seq(
@@ -590,6 +640,70 @@ class ParquetPartitionDiscoverySuite extends QueryTest with ParquetTest with Sha
     }
   }
 
+  test("SPARK-11678: Partition discovery stops at the root path of the dataset") {
+    withTempPath { dir =>
+      val tablePath = new File(dir, "key=value")
+      val df = (1 to 3).map(i => (i, i, i, i)).toDF("a", "b", "c", "d")
+
+      df.write
+        .format("parquet")
+        .partitionBy("b", "c", "d")
+        .save(tablePath.getCanonicalPath)
+
+      Files.touch(new File(s"${tablePath.getCanonicalPath}/", "_SUCCESS"))
+      Files.createParentDirs(new File(s"${dir.getCanonicalPath}/b=1/c=1/.foo/bar"))
+
+      checkAnswer(sqlContext.read.format("parquet").load(tablePath.getCanonicalPath), df)
+    }
+
+    withTempPath { dir =>
+      val path = new File(dir, "key=value")
+      val tablePath = new File(path, "table")
+
+      val df = (1 to 3).map(i => (i, i, i, i)).toDF("a", "b", "c", "d")
+
+      df.write
+        .format("parquet")
+        .partitionBy("b", "c", "d")
+        .save(tablePath.getCanonicalPath)
+
+      Files.touch(new File(s"${tablePath.getCanonicalPath}/", "_SUCCESS"))
+      Files.createParentDirs(new File(s"${dir.getCanonicalPath}/b=1/c=1/.foo/bar"))
+
+      checkAnswer(sqlContext.read.format("parquet").load(tablePath.getCanonicalPath), df)
+    }
+  }
+
+  test("use basePath to specify the root dir of a partitioned table.") {
+    withTempPath { dir =>
+      val tablePath = new File(dir, "table")
+      val df = (1 to 3).map(i => (i, i, i, i)).toDF("a", "b", "c", "d")
+
+      df.write
+        .format("parquet")
+        .partitionBy("b", "c", "d")
+        .save(tablePath.getCanonicalPath)
+
+      val twoPartitionsDF =
+        sqlContext
+          .read
+          .option("basePath", tablePath.getCanonicalPath)
+          .parquet(
+            s"${tablePath.getCanonicalPath}/b=1",
+            s"${tablePath.getCanonicalPath}/b=2")
+
+      checkAnswer(twoPartitionsDF, df.filter("b != 3"))
+
+      intercept[AssertionError] {
+        sqlContext
+          .read
+          .parquet(
+            s"${tablePath.getCanonicalPath}/b=1",
+            s"${tablePath.getCanonicalPath}/b=2")
+      }
+    }
+  }
+
   test("listConflictingPartitionColumns") {
     def makeExpectedMessage(colNameLists: Seq[String], paths: Seq[String]): String = {
       val conflictingColNameLists = colNameLists.zipWithIndex.map { case (list, index) =>
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
index 45de56703976..1136670b7a0e 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/orc/OrcRelation.scala
@@ -157,7 +157,7 @@ private[sql] class OrcRelation(
     override val userDefinedPartitionColumns: Option[StructType],
     parameters: Map[String, String])(
     @transient val sqlContext: SQLContext)
-  extends HadoopFsRelation(maybePartitionSpec)
+  extends HadoopFsRelation(maybePartitionSpec, parameters)
   with Logging {
 
   private[sql] def this(
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
index bdc48a383bbb..01960fd2901b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextRelation.scala
@@ -89,7 +89,7 @@ class SimpleTextRelation(
     override val userDefinedPartitionColumns: Option[StructType],
     parameters: Map[String, String])(
     @transient val sqlContext: SQLContext)
-  extends HadoopFsRelation {
+  extends HadoopFsRelation(parameters) {
 
   import sqlContext.sparkContext
 
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
index 100b97137cff..665e87e3e335 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/hadoopFsRelationSuites.scala
@@ -486,6 +486,7 @@ abstract class HadoopFsRelationTest extends QueryTest with SQLTestUtils with Tes
       val df = sqlContext.read
         .format(dataSourceName)
         .option("dataSchema", dataSchema.json)
+        .option("basePath", file.getCanonicalPath)
         .load(s"${file.getCanonicalPath}/p1=*/p2=???")
 
       val expectedPaths = Set(

From 61a28486ccbcdd37461419df958aea222c8b9f09 Mon Sep 17 00:00:00 2001
From: Rishabh Bhardwaj <rbnext29@gmail.com>
Date: Fri, 13 Nov 2015 08:36:46 -0800
Subject: [PATCH 671/896] [SPARK-11445][DOCS] Replaced example code in
 mllib-ensembles.md using include_example

I have made the required changes and tested.
Kindly review the changes.

Author: Rishabh Bhardwaj <rbnext29@gmail.com>

Closes #9407 from rishabhbhardwaj/SPARK-11445.
---
 docs/mllib-ensembles.md                       | 526 +-----------------
 ...GradientBoostingClassificationExample.java |  92 +++
 ...JavaGradientBoostingRegressionExample.java |  96 ++++
 ...JavaRandomForestClassificationExample.java |  89 +++
 .../JavaRandomForestRegressionExample.java    |  95 ++++
 ...radient_boosting_classification_example.py |  57 ++
 .../gradient_boosting_regression_example.py   |  57 ++
 .../random_forest_classification_example.py   |  58 ++
 .../mllib/random_forest_regression_example.py |  59 ++
 ...radientBoostingClassificationExample.scala |  69 +++
 .../GradientBoostingRegressionExample.scala   |  66 +++
 .../RandomForestClassificationExample.scala   |  67 +++
 .../mllib/RandomForestRegressionExample.scala |  68 +++
 13 files changed, 885 insertions(+), 514 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingClassificationExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingRegressionExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestClassificationExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestRegressionExample.java
 create mode 100644 examples/src/main/python/mllib/gradient_boosting_classification_example.py
 create mode 100644 examples/src/main/python/mllib/gradient_boosting_regression_example.py
 create mode 100644 examples/src/main/python/mllib/random_forest_classification_example.py
 create mode 100644 examples/src/main/python/mllib/random_forest_regression_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingClassificationExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingRegressionExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestClassificationExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestRegressionExample.scala

diff --git a/docs/mllib-ensembles.md b/docs/mllib-ensembles.md
index fc587298f7d2..50450e05d2ab 100644
--- a/docs/mllib-ensembles.md
+++ b/docs/mllib-ensembles.md
@@ -98,144 +98,19 @@ The test error is calculated to measure the algorithm accuracy.
 <div data-lang="scala" markdown="1">
 Refer to the [`RandomForest` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.RandomForest) and [`RandomForestModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.RandomForestModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.RandomForest
-import org.apache.spark.mllib.tree.model.RandomForestModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a RandomForest model.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-val numClasses = 2
-val categoricalFeaturesInfo = Map[Int, Int]()
-val numTrees = 3 // Use more in practice.
-val featureSubsetStrategy = "auto" // Let the algorithm choose.
-val impurity = "gini"
-val maxDepth = 4
-val maxBins = 32
-
-val model = RandomForest.trainClassifier(trainingData, numClasses, categoricalFeaturesInfo,
-  numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins)
-
-// Evaluate model on test instances and compute test error
-val labelAndPreds = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testErr = labelAndPreds.filter(r => r._1 != r._2).count.toDouble / testData.count()
-println("Test Error = " + testErr)
-println("Learned classification forest model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = RandomForestModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/RandomForestClassificationExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`RandomForest` Java docs](api/java/org/apache/spark/mllib/tree/RandomForest.html) and [`RandomForestModel` Java docs](api/java/org/apache/spark/mllib/tree/model/RandomForestModel.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-import java.util.HashMap;
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.RandomForest;
-import org.apache.spark.mllib.tree.model.RandomForestModel;
-import org.apache.spark.mllib.util.MLUtils;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaRandomForestClassification");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Train a RandomForest model.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Integer numClasses = 2;
-HashMap<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-Integer numTrees = 3; // Use more in practice.
-String featureSubsetStrategy = "auto"; // Let the algorithm choose.
-String impurity = "gini";
-Integer maxDepth = 5;
-Integer maxBins = 32;
-Integer seed = 12345;
-
-final RandomForestModel model = RandomForest.trainClassifier(trainingData, numClasses,
-  categoricalFeaturesInfo, numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins,
-  seed);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testErr =
-  1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
-    @Override
-    public Boolean call(Tuple2<Double, Double> pl) {
-      return !pl._1().equals(pl._2());
-    }
-  }).count() / testData.count();
-System.out.println("Test Error: " + testErr);
-System.out.println("Learned classification forest model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-RandomForestModel sameModel = RandomForestModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaRandomForestClassificationExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForest) and [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForestModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.tree import RandomForest, RandomForestModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file into an RDD of LabeledPoint.
-data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a RandomForest model.
-#  Empty categoricalFeaturesInfo indicates all features are continuous.
-#  Note: Use larger numTrees in practice.
-#  Setting featureSubsetStrategy="auto" lets the algorithm choose.
-model = RandomForest.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
-                                     numTrees=3, featureSubsetStrategy="auto",
-                                     impurity='gini', maxDepth=4, maxBins=32)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
-print('Test Error = ' + str(testErr))
-print('Learned classification forest model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = RandomForestModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/random_forest_classification_example.py %}
 </div>
 
 </div>
@@ -254,147 +129,19 @@ The Mean Squared Error (MSE) is computed at the end to evaluate
 <div data-lang="scala" markdown="1">
 Refer to the [`RandomForest` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.RandomForest) and [`RandomForestModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.RandomForestModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.RandomForest
-import org.apache.spark.mllib.tree.model.RandomForestModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a RandomForest model.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-val numClasses = 2
-val categoricalFeaturesInfo = Map[Int, Int]()
-val numTrees = 3 // Use more in practice.
-val featureSubsetStrategy = "auto" // Let the algorithm choose.
-val impurity = "variance"
-val maxDepth = 4
-val maxBins = 32
-
-val model = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo,
-  numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins)
-
-// Evaluate model on test instances and compute test error
-val labelsAndPredictions = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testMSE = labelsAndPredictions.map{ case(v, p) => math.pow((v - p), 2)}.mean()
-println("Test Mean Squared Error = " + testMSE)
-println("Learned regression forest model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = RandomForestModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/RandomForestRegressionExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`RandomForest` Java docs](api/java/org/apache/spark/mllib/tree/RandomForest.html) and [`RandomForestModel` Java docs](api/java/org/apache/spark/mllib/tree/model/RandomForestModel.html) for details on the API.
 
-{% highlight java %}
-import java.util.HashMap;
-import scala.Tuple2;
-import org.apache.spark.api.java.function.Function2;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.RandomForest;
-import org.apache.spark.mllib.tree.model.RandomForestModel;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.SparkConf;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaRandomForest");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Set parameters.
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-String impurity = "variance";
-Integer maxDepth = 4;
-Integer maxBins = 32;
-
-// Train a RandomForest model.
-final RandomForestModel model = RandomForest.trainRegressor(trainingData,
-  categoricalFeaturesInfo, impurity, maxDepth, maxBins);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testMSE =
-  predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
-    @Override
-    public Double call(Tuple2<Double, Double> pl) {
-      Double diff = pl._1() - pl._2();
-      return diff * diff;
-    }
-  }).reduce(new Function2<Double, Double, Double>() {
-    @Override
-    public Double call(Double a, Double b) {
-      return a + b;
-    }
-  }) / testData.count();
-System.out.println("Test Mean Squared Error: " + testMSE);
-System.out.println("Learned regression forest model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-RandomForestModel sameModel = RandomForestModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaRandomForestRegressionExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForest) and [`RandomForest` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.RandomForestModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.tree import RandomForest, RandomForestModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file into an RDD of LabeledPoint.
-data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a RandomForest model.
-#  Empty categoricalFeaturesInfo indicates all features are continuous.
-#  Note: Use larger numTrees in practice.
-#  Setting featureSubsetStrategy="auto" lets the algorithm choose.
-model = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo={},
-                                    numTrees=3, featureSubsetStrategy="auto",
-                                    impurity='variance', maxDepth=4, maxBins=32)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() / float(testData.count())
-print('Test Mean Squared Error = ' + str(testMSE))
-print('Learned regression forest model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = RandomForestModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/random_forest_regression_example.py %}
 </div>
 
 </div>
@@ -492,141 +239,19 @@ The test error is calculated to measure the algorithm accuracy.
 <div data-lang="scala" markdown="1">
 Refer to the [`GradientBoostedTrees` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.GradientBoostedTreesModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.GradientBoostedTrees
-import org.apache.spark.mllib.tree.configuration.BoostingStrategy
-import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a GradientBoostedTrees model.
-//  The defaultParams for Classification use LogLoss by default.
-val boostingStrategy = BoostingStrategy.defaultParams("Classification")
-boostingStrategy.numIterations = 3 // Note: Use more iterations in practice.
-boostingStrategy.treeStrategy.numClasses = 2
-boostingStrategy.treeStrategy.maxDepth = 5
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-boostingStrategy.treeStrategy.categoricalFeaturesInfo = Map[Int, Int]()
-
-val model = GradientBoostedTrees.train(trainingData, boostingStrategy)
-
-// Evaluate model on test instances and compute test error
-val labelAndPreds = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testErr = labelAndPreds.filter(r => r._1 != r._2).count.toDouble / testData.count()
-println("Test Error = " + testErr)
-println("Learned classification GBT model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/GradientBoostingClassificationExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`GradientBoostedTrees` Java docs](api/java/org/apache/spark/mllib/tree/GradientBoostedTrees.html) and [`GradientBoostedTreesModel` Java docs](api/java/org/apache/spark/mllib/tree/model/GradientBoostedTreesModel.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-import java.util.HashMap;
-import java.util.Map;
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.GradientBoostedTrees;
-import org.apache.spark.mllib.tree.configuration.BoostingStrategy;
-import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel;
-import org.apache.spark.mllib.util.MLUtils;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaGradientBoostedTrees");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Train a GradientBoostedTrees model.
-//  The defaultParams for Classification use LogLoss by default.
-BoostingStrategy boostingStrategy = BoostingStrategy.defaultParams("Classification");
-boostingStrategy.setNumIterations(3); // Note: Use more iterations in practice.
-boostingStrategy.getTreeStrategy().setNumClassesForClassification(2);
-boostingStrategy.getTreeStrategy().setMaxDepth(5);
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-boostingStrategy.treeStrategy().setCategoricalFeaturesInfo(categoricalFeaturesInfo);
-
-final GradientBoostedTreesModel model =
-  GradientBoostedTrees.train(trainingData, boostingStrategy);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testErr =
-  1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
-    @Override
-    public Boolean call(Tuple2<Double, Double> pl) {
-      return !pl._1().equals(pl._2());
-    }
-  }).count() / testData.count();
-System.out.println("Test Error: " + testErr);
-System.out.println("Learned classification GBT model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaGradientBoostingClassificationExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`GradientBoostedTrees` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTreesModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file.
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a GradientBoostedTrees model.
-#  Notes: (a) Empty categoricalFeaturesInfo indicates all features are continuous.
-#         (b) Use more iterations in practice.
-model = GradientBoostedTrees.trainClassifier(trainingData,
-    categoricalFeaturesInfo={}, numIterations=3)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
-print('Test Error = ' + str(testErr))
-print('Learned classification GBT model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/gradient_boosting_classification_example.py %}
 </div>
 
 </div>
@@ -645,146 +270,19 @@ The Mean Squared Error (MSE) is computed at the end to evaluate
 <div data-lang="scala" markdown="1">
 Refer to the [`GradientBoostedTrees` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Scala docs](api/scala/index.html#org.apache.spark.mllib.tree.model.GradientBoostedTreesModel) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.tree.GradientBoostedTrees
-import org.apache.spark.mllib.tree.configuration.BoostingStrategy
-import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel
-import org.apache.spark.mllib.util.MLUtils
-
-// Load and parse the data file.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-// Split the data into training and test sets (30% held out for testing)
-val splits = data.randomSplit(Array(0.7, 0.3))
-val (trainingData, testData) = (splits(0), splits(1))
-
-// Train a GradientBoostedTrees model.
-//  The defaultParams for Regression use SquaredError by default.
-val boostingStrategy = BoostingStrategy.defaultParams("Regression")
-boostingStrategy.numIterations = 3 // Note: Use more iterations in practice.
-boostingStrategy.treeStrategy.maxDepth = 5
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-boostingStrategy.treeStrategy.categoricalFeaturesInfo = Map[Int, Int]()
-
-val model = GradientBoostedTrees.train(trainingData, boostingStrategy)
-
-// Evaluate model on test instances and compute test error
-val labelsAndPredictions = testData.map { point =>
-  val prediction = model.predict(point.features)
-  (point.label, prediction)
-}
-val testMSE = labelsAndPredictions.map{ case(v, p) => math.pow((v - p), 2)}.mean()
-println("Test Mean Squared Error = " + testMSE)
-println("Learned regression GBT model:\n" + model.toDebugString)
-
-// Save and load model
-model.save(sc, "myModelPath")
-val sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/GradientBoostingRegressionExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`GradientBoostedTrees` Java docs](api/java/org/apache/spark/mllib/tree/GradientBoostedTrees.html) and [`GradientBoostedTreesModel` Java docs](api/java/org/apache/spark/mllib/tree/model/GradientBoostedTreesModel.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-import java.util.HashMap;
-import java.util.Map;
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.function.Function2;
-import org.apache.spark.api.java.JavaPairRDD;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.api.java.function.PairFunction;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.tree.GradientBoostedTrees;
-import org.apache.spark.mllib.tree.configuration.BoostingStrategy;
-import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel;
-import org.apache.spark.mllib.util.MLUtils;
-
-SparkConf sparkConf = new SparkConf().setAppName("JavaGradientBoostedTrees");
-JavaSparkContext sc = new JavaSparkContext(sparkConf);
-
-// Load and parse the data file.
-String datapath = "data/mllib/sample_libsvm_data.txt";
-JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc.sc(), datapath).toJavaRDD();
-// Split the data into training and test sets (30% held out for testing)
-JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
-JavaRDD<LabeledPoint> trainingData = splits[0];
-JavaRDD<LabeledPoint> testData = splits[1];
-
-// Train a GradientBoostedTrees model.
-//  The defaultParams for Regression use SquaredError by default.
-BoostingStrategy boostingStrategy = BoostingStrategy.defaultParams("Regression");
-boostingStrategy.setNumIterations(3); // Note: Use more iterations in practice.
-boostingStrategy.getTreeStrategy().setMaxDepth(5);
-//  Empty categoricalFeaturesInfo indicates all features are continuous.
-Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
-boostingStrategy.treeStrategy().setCategoricalFeaturesInfo(categoricalFeaturesInfo);
-
-final GradientBoostedTreesModel model =
-  GradientBoostedTrees.train(trainingData, boostingStrategy);
-
-// Evaluate model on test instances and compute test error
-JavaPairRDD<Double, Double> predictionAndLabel =
-  testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
-    @Override
-    public Tuple2<Double, Double> call(LabeledPoint p) {
-      return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
-    }
-  });
-Double testMSE =
-  predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
-    @Override
-    public Double call(Tuple2<Double, Double> pl) {
-      Double diff = pl._1() - pl._2();
-      return diff * diff;
-    }
-  }).reduce(new Function2<Double, Double, Double>() {
-    @Override
-    public Double call(Double a, Double b) {
-      return a + b;
-    }
-  }) / data.count();
-System.out.println("Test Mean Squared Error: " + testMSE);
-System.out.println("Learned regression GBT model:\n" + model.toDebugString());
-
-// Save and load model
-model.save(sc.sc(), "myModelPath");
-GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(sc.sc(), "myModelPath");
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaGradientBoostingRegressionExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`GradientBoostedTrees` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTrees) and [`GradientBoostedTreesModel` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.tree.GradientBoostedTreesModel) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
-from pyspark.mllib.util import MLUtils
-
-# Load and parse the data file.
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a GradientBoostedTrees model.
-#  Notes: (a) Empty categoricalFeaturesInfo indicates all features are continuous.
-#         (b) Use more iterations in practice.
-model = GradientBoostedTrees.trainRegressor(trainingData,
-    categoricalFeaturesInfo={}, numIterations=3)
-
-# Evaluate model on test instances and compute test error
-predictions = model.predict(testData.map(lambda x: x.features))
-labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
-testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() / float(testData.count())
-print('Test Mean Squared Error = ' + str(testMSE))
-print('Learned regression GBT model:')
-print(model.toDebugString())
-
-# Save and load model
-model.save(sc, "myModelPath")
-sameModel = GradientBoostedTreesModel.load(sc, "myModelPath")
-{% endhighlight %}
+{% include_example python/mllib/gradient_boosting_regression_example.py %}
 </div>
 
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingClassificationExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingClassificationExample.java
new file mode 100644
index 000000000000..80faabd2325d
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingClassificationExample.java
@@ -0,0 +1,92 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+import java.util.Map;
+
+import scala.Tuple2;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.GradientBoostedTrees;
+import org.apache.spark.mllib.tree.configuration.BoostingStrategy;
+import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+
+public class JavaGradientBoostingClassificationExample {
+  public static void main(String[] args) {
+    // $example on$
+    SparkConf sparkConf = new SparkConf()
+      .setAppName("JavaGradientBoostedTreesClassificationExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Train a GradientBoostedTrees model.
+    // The defaultParams for Classification use LogLoss by default.
+    BoostingStrategy boostingStrategy = BoostingStrategy.defaultParams("Classification");
+    boostingStrategy.setNumIterations(3); // Note: Use more iterations in practice.
+    boostingStrategy.getTreeStrategy().setNumClasses(2);
+    boostingStrategy.getTreeStrategy().setMaxDepth(5);
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    boostingStrategy.treeStrategy().setCategoricalFeaturesInfo(categoricalFeaturesInfo);
+
+    final GradientBoostedTreesModel model =
+      GradientBoostedTrees.train(trainingData, boostingStrategy);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    Double testErr =
+      1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
+        @Override
+        public Boolean call(Tuple2<Double, Double> pl) {
+          return !pl._1().equals(pl._2());
+        }
+      }).count() / testData.count();
+    System.out.println("Test Error: " + testErr);
+    System.out.println("Learned classification GBT model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myGradientBoostingClassificationModel");
+    GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(jsc.sc(),
+      "target/tmp/myGradientBoostingClassificationModel");
+    // $example off$
+  }
+
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingRegressionExample.java
new file mode 100644
index 000000000000..216895b36820
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaGradientBoostingRegressionExample.java
@@ -0,0 +1,96 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+import java.util.Map;
+
+import scala.Tuple2;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.GradientBoostedTrees;
+import org.apache.spark.mllib.tree.configuration.BoostingStrategy;
+import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+
+public class JavaGradientBoostingRegressionExample {
+  public static void main(String[] args) {
+    // $example on$
+    SparkConf sparkConf = new SparkConf()
+      .setAppName("JavaGradientBoostedTreesRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Train a GradientBoostedTrees model.
+    // The defaultParams for Regression use SquaredError by default.
+    BoostingStrategy boostingStrategy = BoostingStrategy.defaultParams("Regression");
+    boostingStrategy.setNumIterations(3); // Note: Use more iterations in practice.
+    boostingStrategy.getTreeStrategy().setMaxDepth(5);
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    boostingStrategy.treeStrategy().setCategoricalFeaturesInfo(categoricalFeaturesInfo);
+
+    final GradientBoostedTreesModel model =
+      GradientBoostedTrees.train(trainingData, boostingStrategy);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    Double testMSE =
+      predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
+        @Override
+        public Double call(Tuple2<Double, Double> pl) {
+          Double diff = pl._1() - pl._2();
+          return diff * diff;
+        }
+      }).reduce(new Function2<Double, Double, Double>() {
+        @Override
+        public Double call(Double a, Double b) {
+          return a + b;
+        }
+      }) / data.count();
+    System.out.println("Test Mean Squared Error: " + testMSE);
+    System.out.println("Learned regression GBT model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myGradientBoostingRegressionModel");
+    GradientBoostedTreesModel sameModel = GradientBoostedTreesModel.load(jsc.sc(),
+      "target/tmp/myGradientBoostingRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestClassificationExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestClassificationExample.java
new file mode 100644
index 000000000000..9219eef1ad2d
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestClassificationExample.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+
+import scala.Tuple2;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.RandomForest;
+import org.apache.spark.mllib.tree.model.RandomForestModel;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+
+public class JavaRandomForestClassificationExample {
+  public static void main(String[] args) {
+    // $example on$
+    SparkConf sparkConf = new SparkConf().setAppName("JavaRandomForestClassificationExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Train a RandomForest model.
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    Integer numClasses = 2;
+    HashMap<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    Integer numTrees = 3; // Use more in practice.
+    String featureSubsetStrategy = "auto"; // Let the algorithm choose.
+    String impurity = "gini";
+    Integer maxDepth = 5;
+    Integer maxBins = 32;
+    Integer seed = 12345;
+
+    final RandomForestModel model = RandomForest.trainClassifier(trainingData, numClasses,
+      categoricalFeaturesInfo, numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins,
+      seed);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    Double testErr =
+      1.0 * predictionAndLabel.filter(new Function<Tuple2<Double, Double>, Boolean>() {
+        @Override
+        public Boolean call(Tuple2<Double, Double> pl) {
+          return !pl._1().equals(pl._2());
+        }
+      }).count() / testData.count();
+    System.out.println("Test Error: " + testErr);
+    System.out.println("Learned classification forest model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myRandomForestClassificationModel");
+    RandomForestModel sameModel = RandomForestModel.load(jsc.sc(),
+      "target/tmp/myRandomForestClassificationModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestRegressionExample.java
new file mode 100644
index 000000000000..4db926a4218f
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRandomForestRegressionExample.java
@@ -0,0 +1,95 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.HashMap;
+import java.util.Map;
+
+import scala.Tuple2;
+
+import org.apache.spark.api.java.function.Function2;
+import org.apache.spark.api.java.JavaPairRDD;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.api.java.function.PairFunction;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.tree.RandomForest;
+import org.apache.spark.mllib.tree.model.RandomForestModel;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.SparkConf;
+// $example off$
+
+public class JavaRandomForestRegressionExample {
+  public static void main(String[] args) {
+    // $example on$
+    SparkConf sparkConf = new SparkConf().setAppName("JavaRandomForestRegressionExample");
+    JavaSparkContext jsc = new JavaSparkContext(sparkConf);
+    // Load and parse the data file.
+    String datapath = "data/mllib/sample_libsvm_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), datapath).toJavaRDD();
+    // Split the data into training and test sets (30% held out for testing)
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.7, 0.3});
+    JavaRDD<LabeledPoint> trainingData = splits[0];
+    JavaRDD<LabeledPoint> testData = splits[1];
+
+    // Set parameters.
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    Map<Integer, Integer> categoricalFeaturesInfo = new HashMap<Integer, Integer>();
+    Integer numTrees = 3; // Use more in practice.
+    String featureSubsetStrategy = "auto"; // Let the algorithm choose.
+    String impurity = "variance";
+    Integer maxDepth = 4;
+    Integer maxBins = 32;
+    Integer seed = 12345;
+    // Train a RandomForest model.
+    final RandomForestModel model = RandomForest.trainRegressor(trainingData,
+      categoricalFeaturesInfo, numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins, seed);
+
+    // Evaluate model on test instances and compute test error
+    JavaPairRDD<Double, Double> predictionAndLabel =
+      testData.mapToPair(new PairFunction<LabeledPoint, Double, Double>() {
+        @Override
+        public Tuple2<Double, Double> call(LabeledPoint p) {
+          return new Tuple2<Double, Double>(model.predict(p.features()), p.label());
+        }
+      });
+    Double testMSE =
+      predictionAndLabel.map(new Function<Tuple2<Double, Double>, Double>() {
+        @Override
+        public Double call(Tuple2<Double, Double> pl) {
+          Double diff = pl._1() - pl._2();
+          return diff * diff;
+        }
+      }).reduce(new Function2<Double, Double, Double>() {
+        @Override
+        public Double call(Double a, Double b) {
+          return a + b;
+        }
+      }) / testData.count();
+    System.out.println("Test Mean Squared Error: " + testMSE);
+    System.out.println("Learned regression forest model:\n" + model.toDebugString());
+
+    // Save and load model
+    model.save(jsc.sc(), "target/tmp/myRandomForestRegressionModel");
+    RandomForestModel sameModel = RandomForestModel.load(jsc.sc(),
+      "target/tmp/myRandomForestRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/gradient_boosting_classification_example.py b/examples/src/main/python/mllib/gradient_boosting_classification_example.py
new file mode 100644
index 000000000000..a94ea0d582e5
--- /dev/null
+++ b/examples/src/main/python/mllib/gradient_boosting_classification_example.py
@@ -0,0 +1,57 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Gradient Boosted Trees Classification Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="PythonGradientBoostedTreesClassificationExample")
+    # $example on$
+    # Load and parse the data file.
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a GradientBoostedTrees model.
+    #  Notes: (a) Empty categoricalFeaturesInfo indicates all features are continuous.
+    #         (b) Use more iterations in practice.
+    model = GradientBoostedTrees.trainClassifier(trainingData,
+                                                 categoricalFeaturesInfo={}, numIterations=3)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
+    print('Test Error = ' + str(testErr))
+    print('Learned classification GBT model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myGradientBoostingClassificationModel")
+    sameModel = GradientBoostedTreesModel.load(sc,
+                                               "target/tmp/myGradientBoostingClassificationModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/gradient_boosting_regression_example.py b/examples/src/main/python/mllib/gradient_boosting_regression_example.py
new file mode 100644
index 000000000000..86040799dc1d
--- /dev/null
+++ b/examples/src/main/python/mllib/gradient_boosting_regression_example.py
@@ -0,0 +1,57 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Gradient Boosted Trees Regression Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import GradientBoostedTrees, GradientBoostedTreesModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="PythonGradientBoostedTreesRegressionExample")
+    # $example on$
+    # Load and parse the data file.
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a GradientBoostedTrees model.
+    #  Notes: (a) Empty categoricalFeaturesInfo indicates all features are continuous.
+    #         (b) Use more iterations in practice.
+    model = GradientBoostedTrees.trainRegressor(trainingData,
+                                                categoricalFeaturesInfo={}, numIterations=3)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() /\
+        float(testData.count())
+    print('Test Mean Squared Error = ' + str(testMSE))
+    print('Learned regression GBT model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myGradientBoostingRegressionModel")
+    sameModel = GradientBoostedTreesModel.load(sc, "target/tmp/myGradientBoostingRegressionModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/random_forest_classification_example.py b/examples/src/main/python/mllib/random_forest_classification_example.py
new file mode 100644
index 000000000000..324ba50625d2
--- /dev/null
+++ b/examples/src/main/python/mllib/random_forest_classification_example.py
@@ -0,0 +1,58 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Random Forest Classification Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import RandomForest, RandomForestModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="PythonRandomForestClassificationExample")
+    # $example on$
+    # Load and parse the data file into an RDD of LabeledPoint.
+    data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a RandomForest model.
+    #  Empty categoricalFeaturesInfo indicates all features are continuous.
+    #  Note: Use larger numTrees in practice.
+    #  Setting featureSubsetStrategy="auto" lets the algorithm choose.
+    model = RandomForest.trainClassifier(trainingData, numClasses=2, categoricalFeaturesInfo={},
+                                         numTrees=3, featureSubsetStrategy="auto",
+                                         impurity='gini', maxDepth=4, maxBins=32)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testErr = labelsAndPredictions.filter(lambda (v, p): v != p).count() / float(testData.count())
+    print('Test Error = ' + str(testErr))
+    print('Learned classification forest model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myRandomForestClassificationModel")
+    sameModel = RandomForestModel.load(sc, "target/tmp/myRandomForestClassificationModel")
+    # $example off$
diff --git a/examples/src/main/python/mllib/random_forest_regression_example.py b/examples/src/main/python/mllib/random_forest_regression_example.py
new file mode 100644
index 000000000000..f7aa6114eceb
--- /dev/null
+++ b/examples/src/main/python/mllib/random_forest_regression_example.py
@@ -0,0 +1,59 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Random Forest Regression Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext
+# $example on$
+from pyspark.mllib.tree import RandomForest, RandomForestModel
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="PythonRandomForestRegressionExample")
+    # $example on$
+    # Load and parse the data file into an RDD of LabeledPoint.
+    data = MLUtils.loadLibSVMFile(sc, 'data/mllib/sample_libsvm_data.txt')
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a RandomForest model.
+    #  Empty categoricalFeaturesInfo indicates all features are continuous.
+    #  Note: Use larger numTrees in practice.
+    #  Setting featureSubsetStrategy="auto" lets the algorithm choose.
+    model = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo={},
+                                        numTrees=3, featureSubsetStrategy="auto",
+                                        impurity='variance', maxDepth=4, maxBins=32)
+
+    # Evaluate model on test instances and compute test error
+    predictions = model.predict(testData.map(lambda x: x.features))
+    labelsAndPredictions = testData.map(lambda lp: lp.label).zip(predictions)
+    testMSE = labelsAndPredictions.map(lambda (v, p): (v - p) * (v - p)).sum() /\
+        float(testData.count())
+    print('Test Mean Squared Error = ' + str(testMSE))
+    print('Learned regression forest model:')
+    print(model.toDebugString())
+
+    # Save and load model
+    model.save(sc, "target/tmp/myRandomForestRegressionModel")
+    sameModel = RandomForestModel.load(sc, "target/tmp/myRandomForestRegressionModel")
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingClassificationExample.scala
new file mode 100644
index 000000000000..139e1f909bdc
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingClassificationExample.scala
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.mllib.tree.GradientBoostedTrees
+import org.apache.spark.mllib.tree.configuration.BoostingStrategy
+import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+object GradientBoostingClassificationExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("GradientBoostedTreesClassificationExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a GradientBoostedTrees model.
+    // The defaultParams for Classification use LogLoss by default.
+    val boostingStrategy = BoostingStrategy.defaultParams("Classification")
+    boostingStrategy.numIterations = 3 // Note: Use more iterations in practice.
+    boostingStrategy.treeStrategy.numClasses = 2
+    boostingStrategy.treeStrategy.maxDepth = 5
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    boostingStrategy.treeStrategy.categoricalFeaturesInfo = Map[Int, Int]()
+
+    val model = GradientBoostedTrees.train(trainingData, boostingStrategy)
+
+    // Evaluate model on test instances and compute test error
+    val labelAndPreds = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testErr = labelAndPreds.filter(r => r._1 != r._2).count.toDouble / testData.count()
+    println("Test Error = " + testErr)
+    println("Learned classification GBT model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myGradientBoostingClassificationModel")
+    val sameModel = GradientBoostedTreesModel.load(sc,
+      "target/tmp/myGradientBoostingClassificationModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
+
+
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingRegressionExample.scala
new file mode 100644
index 000000000000..3dc86da8e4d2
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/GradientBoostingRegressionExample.scala
@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.mllib.tree.GradientBoostedTrees
+import org.apache.spark.mllib.tree.configuration.BoostingStrategy
+import org.apache.spark.mllib.tree.model.GradientBoostedTreesModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+object GradientBoostingRegressionExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("GradientBoostedTreesRegressionExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a GradientBoostedTrees model.
+    // The defaultParams for Regression use SquaredError by default.
+    val boostingStrategy = BoostingStrategy.defaultParams("Regression")
+    boostingStrategy.numIterations = 3 // Note: Use more iterations in practice.
+    boostingStrategy.treeStrategy.maxDepth = 5
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    boostingStrategy.treeStrategy.categoricalFeaturesInfo = Map[Int, Int]()
+
+    val model = GradientBoostedTrees.train(trainingData, boostingStrategy)
+
+    // Evaluate model on test instances and compute test error
+    val labelsAndPredictions = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testMSE = labelsAndPredictions.map{ case(v, p) => math.pow((v - p), 2)}.mean()
+    println("Test Mean Squared Error = " + testMSE)
+    println("Learned regression GBT model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myGradientBoostingRegressionModel")
+    val sameModel = GradientBoostedTreesModel.load(sc,
+      "target/tmp/myGradientBoostingRegressionModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestClassificationExample.scala
new file mode 100644
index 000000000000..5e55abd5121c
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestClassificationExample.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.mllib.tree.RandomForest
+import org.apache.spark.mllib.tree.model.RandomForestModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+object RandomForestClassificationExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("RandomForestClassificationExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a RandomForest model.
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    val numClasses = 2
+    val categoricalFeaturesInfo = Map[Int, Int]()
+    val numTrees = 3 // Use more in practice.
+    val featureSubsetStrategy = "auto" // Let the algorithm choose.
+    val impurity = "gini"
+    val maxDepth = 4
+    val maxBins = 32
+
+    val model = RandomForest.trainClassifier(trainingData, numClasses, categoricalFeaturesInfo,
+      numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins)
+
+    // Evaluate model on test instances and compute test error
+    val labelAndPreds = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testErr = labelAndPreds.filter(r => r._1 != r._2).count.toDouble / testData.count()
+    println("Test Error = " + testErr)
+    println("Learned classification forest model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myRandomForestClassificationModel")
+    val sameModel = RandomForestModel.load(sc, "target/tmp/myRandomForestClassificationModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestRegressionExample.scala
new file mode 100644
index 000000000000..a54fb3ab7e37
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/RandomForestRegressionExample.scala
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
+import org.apache.spark.mllib.tree.RandomForest
+import org.apache.spark.mllib.tree.model.RandomForestModel
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+
+object RandomForestRegressionExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("RandomForestRegressionExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load and parse the data file.
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt")
+    // Split the data into training and test sets (30% held out for testing)
+    val splits = data.randomSplit(Array(0.7, 0.3))
+    val (trainingData, testData) = (splits(0), splits(1))
+
+    // Train a RandomForest model.
+    // Empty categoricalFeaturesInfo indicates all features are continuous.
+    val numClasses = 2
+    val categoricalFeaturesInfo = Map[Int, Int]()
+    val numTrees = 3 // Use more in practice.
+    val featureSubsetStrategy = "auto" // Let the algorithm choose.
+    val impurity = "variance"
+    val maxDepth = 4
+    val maxBins = 32
+
+    val model = RandomForest.trainRegressor(trainingData, categoricalFeaturesInfo,
+      numTrees, featureSubsetStrategy, impurity, maxDepth, maxBins)
+
+    // Evaluate model on test instances and compute test error
+    val labelsAndPredictions = testData.map { point =>
+      val prediction = model.predict(point.features)
+      (point.label, prediction)
+    }
+    val testMSE = labelsAndPredictions.map{ case(v, p) => math.pow((v - p), 2)}.mean()
+    println("Test Mean Squared Error = " + testMSE)
+    println("Learned regression forest model:\n" + model.toDebugString)
+
+    // Save and load model
+    model.save(sc, "target/tmp/myRandomForestRegressionModel")
+    val sameModel = RandomForestModel.load(sc, "target/tmp/myRandomForestRegressionModel")
+    // $example off$
+  }
+}
+// scalastyle:on println
+

From 99693fef0a30432d94556154b81872356d921c64 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Fri, 13 Nov 2015 08:43:05 -0800
Subject: [PATCH 672/896] [SPARK-11723][ML][DOC] Use LibSVM data source rather
 than MLUtils.loadLibSVMFile to load DataFrame

Use LibSVM data source rather than MLUtils.loadLibSVMFile to load DataFrame, include:
* Use libSVM data source for all example codes under examples/ml, and remove unused import.
* Use libSVM data source for user guides under ml-*** which were omitted by #8697.
* Fix bug: We should use ```sqlContext.read().format("libsvm").load(path)``` at Java side, but the API doc and user guides misuse as ```sqlContext.read.format("libsvm").load(path)```.
* Code cleanup.

mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9690 from yanboliang/spark-11723.
---
 docs/ml-ensembles.md                          | 10 ++---
 docs/ml-features.md                           |  8 ++--
 docs/ml-guide.md                              | 10 +----
 docs/ml-linear-methods.md                     |  4 +-
 ...JavaDecisionTreeClassificationExample.java |  8 +---
 .../ml/JavaDecisionTreeRegressionExample.java |  9 ++--
 ...MultilayerPerceptronClassifierExample.java |  6 +--
 .../examples/ml/JavaOneVsRestExample.java     | 23 +++++-----
 .../ml/JavaTrainValidationSplitExample.java   |  6 +--
 .../decision_tree_classification_example.py   |  5 +--
 .../ml/decision_tree_regression_example.py    |  5 +--
 .../main/python/ml/gradient_boosted_trees.py  |  5 +--
 .../src/main/python/ml/logistic_regression.py |  5 +--
 .../multilayer_perceptron_classification.py   |  5 +--
 .../main/python/ml/random_forest_example.py   |  4 +-
 .../DecisionTreeClassificationExample.scala   |  6 +--
 .../examples/ml/DecisionTreeExample.scala     | 42 +++++++------------
 .../ml/DecisionTreeRegressionExample.scala    |  7 ++--
 .../apache/spark/examples/ml/GBTExample.scala |  2 +-
 .../examples/ml/LinearRegressionExample.scala |  2 +-
 .../ml/LogisticRegressionExample.scala        |  4 +-
 ...ultilayerPerceptronClassifierExample.scala |  8 ++--
 .../spark/examples/ml/OneVsRestExample.scala  | 17 ++++----
 .../examples/ml/RandomForestExample.scala     |  2 +-
 .../ml/TrainValidationSplitExample.scala      |  4 +-
 .../ml/source/libsvm/LibSVMRelation.scala     |  2 +-
 26 files changed, 79 insertions(+), 130 deletions(-)

diff --git a/docs/ml-ensembles.md b/docs/ml-ensembles.md
index 58f566c9b4b5..ce15f5e6466e 100644
--- a/docs/ml-ensembles.md
+++ b/docs/ml-ensembles.md
@@ -195,7 +195,7 @@ import org.apache.spark.ml.feature.*;
 import org.apache.spark.sql.DataFrame;
 
 // Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read.format("libsvm")
+DataFrame data = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 
 // Index labels, adding metadata to the label column.
@@ -384,7 +384,7 @@ import org.apache.spark.ml.regression.RandomForestRegressor;
 import org.apache.spark.sql.DataFrame;
 
 // Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read.format("libsvm")
+DataFrame data = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 
 // Automatically identify categorical features, and index them.
@@ -640,7 +640,7 @@ import org.apache.spark.ml.feature.*;
 import org.apache.spark.sql.DataFrame;
 
 // Load and parse the data file, converting it to a DataFrame.
-DataFrame data sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+DataFrame data sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
 
 // Index labels, adding metadata to the label column.
 // Fit on whole dataset to include all labels in index.
@@ -830,7 +830,7 @@ import org.apache.spark.ml.regression.GBTRegressor;
 import org.apache.spark.sql.DataFrame;
 
 // Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
 
 // Automatically identify categorical features, and index them.
 // Set maxCategories so features with > 4 distinct values are treated as continuous.
@@ -1000,7 +1000,7 @@ SparkConf conf = new SparkConf().setAppName("JavaOneVsRestExample");
 JavaSparkContext jsc = new JavaSparkContext(conf);
 SQLContext jsql = new SQLContext(jsc);
 
-DataFrame dataFrame = sqlContext.read.format("libsvm")
+DataFrame dataFrame = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_multiclass_classification_data.txt");
 
 DataFrame[] splits = dataFrame.randomSplit(new double[] {0.7, 0.3}, 12345);
diff --git a/docs/ml-features.md b/docs/ml-features.md
index 142afac2f3f9..cd1838d6d288 100644
--- a/docs/ml-features.md
+++ b/docs/ml-features.md
@@ -1109,7 +1109,7 @@ import org.apache.spark.ml.feature.VectorIndexer;
 import org.apache.spark.ml.feature.VectorIndexerModel;
 import org.apache.spark.sql.DataFrame;
 
-DataFrame data = sqlContext.read.format("libsvm")
+DataFrame data = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 VectorIndexer indexer = new VectorIndexer()
   .setInputCol("features")
@@ -1187,7 +1187,7 @@ for more details on the API.
 import org.apache.spark.ml.feature.Normalizer;
 import org.apache.spark.sql.DataFrame;
 
-DataFrame dataFrame = sqlContext.read.format("libsvm")
+DataFrame dataFrame = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 
 // Normalize each Vector using $L^1$ norm.
@@ -1273,7 +1273,7 @@ import org.apache.spark.ml.feature.StandardScaler;
 import org.apache.spark.ml.feature.StandardScalerModel;
 import org.apache.spark.sql.DataFrame;
 
-DataFrame dataFrame = sqlContext.read.format("libsvm")
+DataFrame dataFrame = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 StandardScaler scaler = new StandardScaler()
   .setInputCol("features")
@@ -1366,7 +1366,7 @@ import org.apache.spark.ml.feature.MinMaxScaler;
 import org.apache.spark.ml.feature.MinMaxScalerModel;
 import org.apache.spark.sql.DataFrame;
 
-DataFrame dataFrame = sqlContext.read.format("libsvm")
+DataFrame dataFrame = sqlContext.read().format("libsvm")
   .load("data/mllib/sample_libsvm_data.txt");
 MinMaxScaler scaler = new MinMaxScaler()
   .setInputCol("features")
diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index c293e71d2870..be18a05361a1 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -867,10 +867,9 @@ The `ParamMap` which produces the best evaluation metric is selected as the best
 import org.apache.spark.ml.evaluation.RegressionEvaluator
 import org.apache.spark.ml.regression.LinearRegression
 import org.apache.spark.ml.tuning.{ParamGridBuilder, TrainValidationSplit}
-import org.apache.spark.mllib.util.MLUtils
 
 // Prepare training and test data.
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 val Array(training, test) = data.randomSplit(Array(0.9, 0.1), seed = 12345)
 
 val lr = new LinearRegression()
@@ -911,14 +910,9 @@ import org.apache.spark.ml.evaluation.RegressionEvaluator;
 import org.apache.spark.ml.param.ParamMap;
 import org.apache.spark.ml.regression.LinearRegression;
 import org.apache.spark.ml.tuning.*;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
 import org.apache.spark.sql.DataFrame;
 
-DataFrame data = sqlContext.createDataFrame(
-  MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt"),
-  LabeledPoint.class);
+DataFrame data = jsql.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
 
 // Prepare training and test data.
 DataFrame[] splits = data.randomSplit(new double[] {0.9, 0.1}, 12345);
diff --git a/docs/ml-linear-methods.md b/docs/ml-linear-methods.md
index 16e2ee71293a..85edfd373465 100644
--- a/docs/ml-linear-methods.md
+++ b/docs/ml-linear-methods.md
@@ -95,7 +95,7 @@ public class LogisticRegressionWithElasticNetExample {
     String path = "data/mllib/sample_libsvm_data.txt";
 
     // Load training data
-    DataFrame training = sqlContext.read.format("libsvm").load(path);
+    DataFrame training = sqlContext.read().format("libsvm").load(path);
 
     LogisticRegression lr = new LogisticRegression()
       .setMaxIter(10)
@@ -292,7 +292,7 @@ public class LinearRegressionWithElasticNetExample {
     String path = "data/mllib/sample_libsvm_data.txt";
 
     // Load training data
-    DataFrame training = sqlContext.read.format("libsvm").load(path);
+    DataFrame training = sqlContext.read().format("libsvm").load(path);
 
     LinearRegression lr = new LinearRegression()
       .setMaxIter(10)
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
index 51c1730a8a08..482225e585cf 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeClassificationExample.java
@@ -26,9 +26,6 @@
 import org.apache.spark.ml.classification.DecisionTreeClassificationModel;
 import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
 import org.apache.spark.ml.feature.*;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
 import org.apache.spark.sql.DataFrame;
 import org.apache.spark.sql.SQLContext;
 // $example off$
@@ -40,9 +37,8 @@ public static void main(String[] args) {
     SQLContext sqlContext = new SQLContext(jsc);
 
     // $example on$
-    // Load and parse the data file, converting it to a DataFrame.
-    RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt");
-    DataFrame data = sqlContext.createDataFrame(rdd, LabeledPoint.class);
+    // Load the data stored in LIBSVM format as a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
 
     // Index labels, adding metadata to the label column.
     // Fit on whole dataset to include all labels in index.
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
index a4098a4233ec..c7f1868dd105 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaDecisionTreeRegressionExample.java
@@ -27,9 +27,6 @@
 import org.apache.spark.ml.feature.VectorIndexerModel;
 import org.apache.spark.ml.regression.DecisionTreeRegressionModel;
 import org.apache.spark.ml.regression.DecisionTreeRegressor;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
 import org.apache.spark.sql.DataFrame;
 import org.apache.spark.sql.SQLContext;
 // $example off$
@@ -40,9 +37,9 @@ public static void main(String[] args) {
     JavaSparkContext jsc = new JavaSparkContext(conf);
     SQLContext sqlContext = new SQLContext(jsc);
     // $example on$
-    // Load and parse the data file, converting it to a DataFrame.
-    RDD<LabeledPoint> rdd = MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt");
-    DataFrame data = sqlContext.createDataFrame(rdd, LabeledPoint.class);
+    // Load the data stored in LIBSVM format as a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm")
+      .load("data/mllib/sample_libsvm_data.txt");
 
     // Automatically identify categorical features, and index them.
     // Set maxCategories so features with > 4 distinct values are treated as continuous.
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
index f48e1339c500..84369f6681d0 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaMultilayerPerceptronClassifierExample.java
@@ -21,12 +21,9 @@
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaSparkContext;
 import org.apache.spark.sql.SQLContext;
-import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.ml.classification.MultilayerPerceptronClassificationModel;
 import org.apache.spark.ml.classification.MultilayerPerceptronClassifier;
 import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
 import org.apache.spark.sql.DataFrame;
 // $example off$
 
@@ -43,8 +40,7 @@ public static void main(String[] args) {
     // $example on$
     // Load training data
     String path = "data/mllib/sample_multiclass_classification_data.txt";
-    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(jsc.sc(), path).toJavaRDD();
-    DataFrame dataFrame = jsql.createDataFrame(data, LabeledPoint.class);
+    DataFrame dataFrame = jsql.read().format("libsvm").load(path);
     // Split the data into train and test
     DataFrame[] splits = dataFrame.randomSplit(new double[]{0.6, 0.4}, 1234L);
     DataFrame train = splits[0];
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
index e7f2f6f61507..f0d92a56bee7 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
@@ -27,9 +27,7 @@
 import org.apache.spark.ml.util.MetadataUtils;
 import org.apache.spark.mllib.evaluation.MulticlassMetrics;
 import org.apache.spark.mllib.linalg.Matrix;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.rdd.RDD;
+import org.apache.spark.mllib.linalg.Vector;
 import org.apache.spark.sql.DataFrame;
 import org.apache.spark.sql.SQLContext;
 import org.apache.spark.sql.types.StructField;
@@ -80,31 +78,30 @@ public static void main(String[] args) {
     OneVsRest ovr = new OneVsRest().setClassifier(classifier);
 
     String input = params.input;
-    RDD<LabeledPoint> inputData = MLUtils.loadLibSVMFile(jsc.sc(), input);
-    RDD<LabeledPoint> train;
-    RDD<LabeledPoint> test;
+    DataFrame inputData = jsql.read().format("libsvm").load(input);
+    DataFrame train;
+    DataFrame test;
 
     // compute the train/ test split: if testInput is not provided use part of input
     String testInput = params.testInput;
     if (testInput != null) {
       train = inputData;
       // compute the number of features in the training set.
-      int numFeatures = inputData.first().features().size();
-      test = MLUtils.loadLibSVMFile(jsc.sc(), testInput, numFeatures);
+      int numFeatures = inputData.first().<Vector>getAs(1).size();
+      test = jsql.read().format("libsvm").option("numFeatures",
+        String.valueOf(numFeatures)).load(testInput);
     } else {
       double f = params.fracTest;
-      RDD<LabeledPoint>[] tmp = inputData.randomSplit(new double[]{1 - f, f}, 12345);
+      DataFrame[] tmp = inputData.randomSplit(new double[]{1 - f, f}, 12345);
       train = tmp[0];
       test = tmp[1];
     }
 
     // train the multiclass model
-    DataFrame trainingDataFrame = jsql.createDataFrame(train, LabeledPoint.class);
-    OneVsRestModel ovrModel = ovr.fit(trainingDataFrame.cache());
+    OneVsRestModel ovrModel = ovr.fit(train.cache());
 
     // score the model on test data
-    DataFrame testDataFrame = jsql.createDataFrame(test, LabeledPoint.class);
-    DataFrame predictions = ovrModel.transform(testDataFrame.cache())
+    DataFrame predictions = ovrModel.transform(test.cache())
       .select("prediction", "label");
 
     // obtain metrics
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaTrainValidationSplitExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaTrainValidationSplitExample.java
index 23f834ab4332..d433905fc801 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaTrainValidationSplitExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaTrainValidationSplitExample.java
@@ -23,8 +23,6 @@
 import org.apache.spark.ml.param.ParamMap;
 import org.apache.spark.ml.regression.LinearRegression;
 import org.apache.spark.ml.tuning.*;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
 import org.apache.spark.sql.DataFrame;
 import org.apache.spark.sql.SQLContext;
 
@@ -46,9 +44,7 @@ public static void main(String[] args) {
     JavaSparkContext jsc = new JavaSparkContext(conf);
     SQLContext jsql = new SQLContext(jsc);
 
-    DataFrame data = jsql.createDataFrame(
-      MLUtils.loadLibSVMFile(jsc.sc(), "data/mllib/sample_libsvm_data.txt"),
-      LabeledPoint.class);
+    DataFrame data = jsql.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
 
     // Prepare training and test data.
     DataFrame[] splits = data.randomSplit(new double [] {0.9, 0.1}, 12345);
diff --git a/examples/src/main/python/ml/decision_tree_classification_example.py b/examples/src/main/python/ml/decision_tree_classification_example.py
index 0af92050e3e3..8cda56dbb9bd 100644
--- a/examples/src/main/python/ml/decision_tree_classification_example.py
+++ b/examples/src/main/python/ml/decision_tree_classification_example.py
@@ -28,7 +28,6 @@
 from pyspark.ml.classification import DecisionTreeClassifier
 from pyspark.ml.feature import StringIndexer, VectorIndexer
 from pyspark.ml.evaluation import MulticlassClassificationEvaluator
-from pyspark.mllib.util import MLUtils
 # $example off$
 
 if __name__ == "__main__":
@@ -36,8 +35,8 @@
     sqlContext = SQLContext(sc)
 
     # $example on$
-    # Load and parse the data file, converting it to a DataFrame.
-    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    # Load the data stored in LIBSVM format as a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     # Index labels, adding metadata to the label column.
     # Fit on whole dataset to include all labels in index.
diff --git a/examples/src/main/python/ml/decision_tree_regression_example.py b/examples/src/main/python/ml/decision_tree_regression_example.py
index 3857aed538da..439e39894749 100644
--- a/examples/src/main/python/ml/decision_tree_regression_example.py
+++ b/examples/src/main/python/ml/decision_tree_regression_example.py
@@ -28,7 +28,6 @@
 from pyspark.ml.regression import DecisionTreeRegressor
 from pyspark.ml.feature import VectorIndexer
 from pyspark.ml.evaluation import RegressionEvaluator
-from pyspark.mllib.util import MLUtils
 # $example off$
 
 if __name__ == "__main__":
@@ -36,8 +35,8 @@
     sqlContext = SQLContext(sc)
 
     # $example on$
-    # Load and parse the data file, converting it to a DataFrame.
-    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    # Load the data stored in LIBSVM format as a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     # Automatically identify categorical features, and index them.
     # We specify maxCategories so features with > 4 distinct values are treated as continuous.
diff --git a/examples/src/main/python/ml/gradient_boosted_trees.py b/examples/src/main/python/ml/gradient_boosted_trees.py
index 6446f0fe5eea..c3bf8aa2eb1e 100644
--- a/examples/src/main/python/ml/gradient_boosted_trees.py
+++ b/examples/src/main/python/ml/gradient_boosted_trees.py
@@ -24,7 +24,6 @@
 from pyspark.ml.feature import StringIndexer
 from pyspark.ml.regression import GBTRegressor
 from pyspark.mllib.evaluation import BinaryClassificationMetrics, RegressionMetrics
-from pyspark.mllib.util import MLUtils
 from pyspark.sql import Row, SQLContext
 
 """
@@ -70,8 +69,8 @@ def testRegression(train, test):
     sc = SparkContext(appName="PythonGBTExample")
     sqlContext = SQLContext(sc)
 
-    # Load and parse the data file into a dataframe.
-    df = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    # Load the data stored in LIBSVM format as a DataFrame.
+    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     # Map labels into an indexed column of labels in [0, numLabels)
     stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
diff --git a/examples/src/main/python/ml/logistic_regression.py b/examples/src/main/python/ml/logistic_regression.py
index 55afe1b207fe..4cd027fdfbe8 100644
--- a/examples/src/main/python/ml/logistic_regression.py
+++ b/examples/src/main/python/ml/logistic_regression.py
@@ -23,7 +23,6 @@
 from pyspark.ml.classification import LogisticRegression
 from pyspark.mllib.evaluation import MulticlassMetrics
 from pyspark.ml.feature import StringIndexer
-from pyspark.mllib.util import MLUtils
 from pyspark.sql import SQLContext
 
 """
@@ -41,8 +40,8 @@
     sc = SparkContext(appName="PythonLogisticRegressionExample")
     sqlContext = SQLContext(sc)
 
-    # Load and parse the data file into a dataframe.
-    df = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    # Load the data stored in LIBSVM format as a DataFrame.
+    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     # Map labels into an indexed column of labels in [0, numLabels)
     stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
diff --git a/examples/src/main/python/ml/multilayer_perceptron_classification.py b/examples/src/main/python/ml/multilayer_perceptron_classification.py
index d8ef9f39e3fa..f84588f547ff 100644
--- a/examples/src/main/python/ml/multilayer_perceptron_classification.py
+++ b/examples/src/main/python/ml/multilayer_perceptron_classification.py
@@ -22,7 +22,6 @@
 # $example on$
 from pyspark.ml.classification import MultilayerPerceptronClassifier
 from pyspark.ml.evaluation import MulticlassClassificationEvaluator
-from pyspark.mllib.util import MLUtils
 # $example off$
 
 if __name__ == "__main__":
@@ -32,8 +31,8 @@
 
     # $example on$
     # Load training data
-    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")\
-        .toDF()
+    data = sqlContext.read.format("libsvm")\
+        .load("data/mllib/sample_multiclass_classification_data.txt")
     # Split the data into train and test
     splits = data.randomSplit([0.6, 0.4], 1234)
     train = splits[0]
diff --git a/examples/src/main/python/ml/random_forest_example.py b/examples/src/main/python/ml/random_forest_example.py
index c7730e1bfacd..dc6a77867019 100644
--- a/examples/src/main/python/ml/random_forest_example.py
+++ b/examples/src/main/python/ml/random_forest_example.py
@@ -74,8 +74,8 @@ def testRegression(train, test):
     sc = SparkContext(appName="PythonRandomForestExample")
     sqlContext = SQLContext(sc)
 
-    # Load and parse the data file into a dataframe.
-    df = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    # Load the data stored in LIBSVM format as a DataFrame.
+    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     # Map labels into an indexed column of labels in [0, numLabels)
     stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
index a24a344f1bcf..ff8a0a90f1e4 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
@@ -26,7 +26,6 @@ import org.apache.spark.ml.classification.DecisionTreeClassifier
 import org.apache.spark.ml.classification.DecisionTreeClassificationModel
 import org.apache.spark.ml.feature.{StringIndexer, IndexToString, VectorIndexer}
 import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-import org.apache.spark.mllib.util.MLUtils
 // $example off$
 
 object DecisionTreeClassificationExample {
@@ -34,10 +33,9 @@ object DecisionTreeClassificationExample {
     val conf = new SparkConf().setAppName("DecisionTreeClassificationExample")
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
     // $example on$
-    // Load and parse the data file, converting it to a DataFrame.
-    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    // Load the data stored in LIBSVM format as a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     // Index labels, adding metadata to the label column.
     // Fit on whole dataset to include all labels in index.
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeExample.scala
index f28671f7869f..c4e98dfaca6c 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeExample.scala
@@ -32,10 +32,7 @@ import org.apache.spark.ml.regression.{DecisionTreeRegressionModel, DecisionTree
 import org.apache.spark.ml.util.MetadataUtils
 import org.apache.spark.mllib.evaluation.{RegressionMetrics, MulticlassMetrics}
 import org.apache.spark.mllib.linalg.Vector
-import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.types.StringType
 import org.apache.spark.sql.{SQLContext, DataFrame}
 
 
@@ -138,15 +135,18 @@ object DecisionTreeExample {
 
   /** Load a dataset from the given path, using the given format */
   private[ml] def loadData(
-      sc: SparkContext,
+      sqlContext: SQLContext,
       path: String,
       format: String,
-      expectedNumFeatures: Option[Int] = None): RDD[LabeledPoint] = {
+      expectedNumFeatures: Option[Int] = None): DataFrame = {
+    import sqlContext.implicits._
+
     format match {
-      case "dense" => MLUtils.loadLabeledPoints(sc, path)
+      case "dense" => MLUtils.loadLabeledPoints(sqlContext.sparkContext, path).toDF()
       case "libsvm" => expectedNumFeatures match {
-        case Some(numFeatures) => MLUtils.loadLibSVMFile(sc, path, numFeatures)
-        case None => MLUtils.loadLibSVMFile(sc, path)
+        case Some(numFeatures) => sqlContext.read.option("numFeatures", numFeatures.toString)
+          .format("libsvm").load(path)
+        case None => sqlContext.read.format("libsvm").load(path)
       }
       case _ => throw new IllegalArgumentException(s"Bad data format: $format")
     }
@@ -169,36 +169,22 @@ object DecisionTreeExample {
       algo: String,
       fracTest: Double): (DataFrame, DataFrame) = {
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
 
     // Load training data
-    val origExamples: RDD[LabeledPoint] = loadData(sc, input, dataFormat)
+    val origExamples: DataFrame = loadData(sqlContext, input, dataFormat)
 
     // Load or create test set
-    val splits: Array[RDD[LabeledPoint]] = if (testInput != "") {
+    val dataframes: Array[DataFrame] = if (testInput != "") {
       // Load testInput.
-      val numFeatures = origExamples.take(1)(0).features.size
-      val origTestExamples: RDD[LabeledPoint] =
-        loadData(sc, testInput, dataFormat, Some(numFeatures))
+      val numFeatures = origExamples.first().getAs[Vector](1).size
+      val origTestExamples: DataFrame =
+        loadData(sqlContext, testInput, dataFormat, Some(numFeatures))
       Array(origExamples, origTestExamples)
     } else {
       // Split input into training, test.
       origExamples.randomSplit(Array(1.0 - fracTest, fracTest), seed = 12345)
     }
 
-    // For classification, convert labels to Strings since we will index them later with
-    // StringIndexer.
-    def labelsToStrings(data: DataFrame): DataFrame = {
-      algo.toLowerCase match {
-        case "classification" =>
-          data.withColumn("labelString", data("label").cast(StringType))
-        case "regression" =>
-          data
-        case _ =>
-          throw new IllegalArgumentException("Algo ${params.algo} not supported.")
-      }
-    }
-    val dataframes = splits.map(_.toDF()).map(labelsToStrings)
     val training = dataframes(0).cache()
     val test = dataframes(1).cache()
 
@@ -230,7 +216,7 @@ object DecisionTreeExample {
     val labelColName = if (algo == "classification") "indexedLabel" else "label"
     if (algo == "classification") {
       val labelIndexer = new StringIndexer()
-        .setInputCol("labelString")
+        .setInputCol("label")
         .setOutputCol(labelColName)
       stages += labelIndexer
     }
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
index 64cd98612900..fc402724d215 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
@@ -25,17 +25,16 @@ import org.apache.spark.ml.regression.DecisionTreeRegressor
 import org.apache.spark.ml.regression.DecisionTreeRegressionModel
 import org.apache.spark.ml.feature.VectorIndexer
 import org.apache.spark.ml.evaluation.RegressionEvaluator
-import org.apache.spark.mllib.util.MLUtils
 // $example off$
 object DecisionTreeRegressionExample {
   def main(args: Array[String]): Unit = {
     val conf = new SparkConf().setAppName("DecisionTreeRegressionExample")
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
+
     // $example on$
-    // Load and parse the data file, converting it to a DataFrame.
-    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    // Load the data stored in LIBSVM format as a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
 
     // Automatically identify categorical features, and index them.
     // Here, we treat features with > 4 distinct values as continuous.
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/GBTExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/GBTExample.scala
index f4a15f806ea8..6b0be0f34e19 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/GBTExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/GBTExample.scala
@@ -153,7 +153,7 @@ object GBTExample {
     val labelColName = if (algo == "classification") "indexedLabel" else "label"
     if (algo == "classification") {
       val labelIndexer = new StringIndexer()
-        .setInputCol("labelString")
+        .setInputCol("label")
         .setOutputCol(labelColName)
       stages += labelIndexer
     }
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionExample.scala
index b73299fb12d3..50998c94de3d 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionExample.scala
@@ -131,7 +131,7 @@ object LinearRegressionExample {
     println(s"Training time: $elapsedTime seconds")
 
     // Print the weights and intercept for linear regression.
-    println(s"Weights: ${lirModel.weights} Intercept: ${lirModel.intercept}")
+    println(s"Weights: ${lirModel.coefficients} Intercept: ${lirModel.intercept}")
 
     println("Training data results:")
     DecisionTreeExample.evaluateRegressionModel(lirModel, training, "label")
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionExample.scala
index 8e3760ddb50a..a380c90662a5 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionExample.scala
@@ -125,7 +125,7 @@ object LogisticRegressionExample {
     val stages = new mutable.ArrayBuffer[PipelineStage]()
 
     val labelIndexer = new StringIndexer()
-      .setInputCol("labelString")
+      .setInputCol("label")
       .setOutputCol("indexedLabel")
     stages += labelIndexer
 
@@ -149,7 +149,7 @@ object LogisticRegressionExample {
 
     val lorModel = pipelineModel.stages.last.asInstanceOf[LogisticRegressionModel]
     // Print the weights and intercept for logistic regression.
-    println(s"Weights: ${lorModel.weights} Intercept: ${lorModel.intercept}")
+    println(s"Weights: ${lorModel.coefficients} Intercept: ${lorModel.intercept}")
 
     println("Training data results:")
     DecisionTreeExample.evaluateClassificationModel(pipelineModel, training, "indexedLabel")
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
index 99d5f35b5a56..146b83c8be49 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
@@ -23,7 +23,6 @@ import org.apache.spark.sql.SQLContext
 // $example on$
 import org.apache.spark.ml.classification.MultilayerPerceptronClassifier
 import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-import org.apache.spark.mllib.util.MLUtils
 // $example off$
 
 /**
@@ -35,12 +34,11 @@ object MultilayerPerceptronClassifierExample {
     val conf = new SparkConf().setAppName("MultilayerPerceptronClassifierExample")
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
 
     // $example on$
-    // Load training data
-    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
-      .toDF()
+    // Load the data stored in LIBSVM format as a DataFrame.
+    val data = sqlContext.read.format("libsvm")
+      .load("data/mllib/sample_multiclass_classification_data.txt")
     // Split the data into train and test
     val splits = data.randomSplit(Array(0.6, 0.4), seed = 1234L)
     val train = splits(0)
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
index bab31f585b0e..8e4f1b09a24b 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
@@ -27,9 +27,8 @@ import org.apache.spark.examples.mllib.AbstractParams
 import org.apache.spark.ml.classification.{OneVsRest, LogisticRegression}
 import org.apache.spark.ml.util.MetadataUtils
 import org.apache.spark.mllib.evaluation.MulticlassMetrics
-import org.apache.spark.mllib.regression.LabeledPoint
-import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.rdd.RDD
+import org.apache.spark.mllib.linalg.Vector
+import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.SQLContext
 
 /**
@@ -111,24 +110,24 @@ object OneVsRestExample {
   private def run(params: Params) {
     val conf = new SparkConf().setAppName(s"OneVsRestExample with $params")
     val sc = new SparkContext(conf)
-    val inputData = MLUtils.loadLibSVMFile(sc, params.input)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
 
+    val inputData = sqlContext.read.format("libsvm").load(params.input)
     // compute the train/test split: if testInput is not provided use part of input.
     val data = params.testInput match {
       case Some(t) => {
         // compute the number of features in the training set.
-        val numFeatures = inputData.first().features.size
-        val testData = MLUtils.loadLibSVMFile(sc, t, numFeatures)
-        Array[RDD[LabeledPoint]](inputData, testData)
+        val numFeatures = inputData.first().getAs[Vector](1).size
+        val testData = sqlContext.read.option("numFeatures", numFeatures.toString)
+          .format("libsvm").load(t)
+        Array[DataFrame](inputData, testData)
       }
       case None => {
         val f = params.fracTest
         inputData.randomSplit(Array(1 - f, f), seed = 12345)
       }
     }
-    val Array(train, test) = data.map(_.toDF().cache())
+    val Array(train, test) = data.map(_.cache())
 
     // instantiate the base classifier
     val classifier = new LogisticRegression()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestExample.scala
index 109178f4137b..7a00d99dfe53 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestExample.scala
@@ -159,7 +159,7 @@ object RandomForestExample {
     val labelColName = if (algo == "classification") "indexedLabel" else "label"
     if (algo == "classification") {
       val labelIndexer = new StringIndexer()
-        .setInputCol("labelString")
+        .setInputCol("label")
         .setOutputCol(labelColName)
       stages += labelIndexer
     }
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/TrainValidationSplitExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/TrainValidationSplitExample.scala
index 1abdf219b1c0..cd1b0e9358be 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/TrainValidationSplitExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/TrainValidationSplitExample.scala
@@ -20,7 +20,6 @@ package org.apache.spark.examples.ml
 import org.apache.spark.ml.evaluation.RegressionEvaluator
 import org.apache.spark.ml.regression.LinearRegression
 import org.apache.spark.ml.tuning.{ParamGridBuilder, TrainValidationSplit}
-import org.apache.spark.mllib.util.MLUtils
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.{SparkConf, SparkContext}
 
@@ -39,10 +38,9 @@ object TrainValidationSplitExample {
     val conf = new SparkConf().setAppName("TrainValidationSplitExample")
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._
 
     // Prepare training and test data.
-    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_libsvm_data.txt").toDF()
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
     val Array(training, test) = data.randomSplit(Array(0.9, 0.1), seed = 12345)
 
     val lr = new LinearRegression()
diff --git a/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala b/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
index 1f627777fc68..11b9815ecc83 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/source/libsvm/LibSVMRelation.scala
@@ -82,7 +82,7 @@ private[libsvm] class LibSVMRelation(val path: String, val numFeatures: Int, val
  *     .load("data/mllib/sample_libsvm_data.txt")
  *
  *   // Java
- *   DataFrame df = sqlContext.read.format("libsvm")
+ *   DataFrame df = sqlContext.read().format("libsvm")
  *     .option("numFeatures, "780")
  *     .load("data/mllib/sample_libsvm_data.txt");
  * }}}

From a24477996e936b0861819ffb420f763f80f0b1da Mon Sep 17 00:00:00 2001
From: Andrew Ray <ray.andrew@gmail.com>
Date: Fri, 13 Nov 2015 10:31:17 -0800
Subject: [PATCH 673/896] [SPARK-11690][PYSPARK] Add pivot to python api

This PR adds pivot to the python api of GroupedData with the same syntax as Scala/Java.

Author: Andrew Ray <ray.andrew@gmail.com>

Closes #9653 from aray/sql-pivot-python.
---
 python/pyspark/sql/group.py | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/python/pyspark/sql/group.py b/python/pyspark/sql/group.py
index 71c0bccc5eef..227f40bc3cf5 100644
--- a/python/pyspark/sql/group.py
+++ b/python/pyspark/sql/group.py
@@ -17,7 +17,7 @@
 
 from pyspark import since
 from pyspark.rdd import ignore_unicode_prefix
-from pyspark.sql.column import Column, _to_seq
+from pyspark.sql.column import Column, _to_seq, _to_java_column, _create_column_from_literal
 from pyspark.sql.dataframe import DataFrame
 from pyspark.sql.types import *
 
@@ -167,6 +167,23 @@ def sum(self, *cols):
         [Row(sum(age)=7, sum(height)=165)]
         """
 
+    @since(1.6)
+    def pivot(self, pivot_col, *values):
+        """Pivots a column of the current DataFrame and preform the specified aggregation.
+
+        :param pivot_col: Column to pivot
+        :param values: Optional list of values of pivotColumn that will be translated to columns in
+            the output data frame. If values are not provided the method with do an immediate call
+            to .distinct() on the pivot column.
+        >>> df4.groupBy("year").pivot("course", "dotNET", "Java").sum("earnings").collect()
+        [Row(year=2012, dotNET=15000, Java=20000), Row(year=2013, dotNET=48000, Java=30000)]
+        >>> df4.groupBy("year").pivot("course").sum("earnings").collect()
+        [Row(year=2012, Java=20000, dotNET=15000), Row(year=2013, Java=30000, dotNET=48000)]
+        """
+        jgd = self._jdf.pivot(_to_java_column(pivot_col),
+                              _to_seq(self.sql_ctx._sc, values, _create_column_from_literal))
+        return GroupedData(jgd, self.sql_ctx)
+
 
 def _test():
     import doctest
@@ -182,6 +199,11 @@ def _test():
                           StructField('name', StringType())]))
     globs['df3'] = sc.parallelize([Row(name='Alice', age=2, height=80),
                                    Row(name='Bob', age=5, height=85)]).toDF()
+    globs['df4'] = sc.parallelize([Row(course="dotNET", year=2012, earnings=10000),
+                                   Row(course="Java",   year=2012, earnings=20000),
+                                   Row(course="dotNET", year=2012, earnings=5000),
+                                   Row(course="dotNET", year=2013, earnings=48000),
+                                   Row(course="Java",   year=2013, earnings=30000)]).toDF()
 
     (failure_count, test_count) = doctest.testmod(
         pyspark.sql.group, globs=globs,

From 23b8188f75d945ef70fbb1c4dc9720c2c5f8cbc3 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 13 Nov 2015 11:13:09 -0800
Subject: [PATCH 674/896] [SPARK-11654][SQL][FOLLOW-UP] fix some mistakes and
 clean up

* rename `AppendColumn` to `AppendColumns` to be consistent with the physical plan name.
* clean up stale comments.
* always pass in resolved encoder to `TypedColumn.withInputType`(test added)
* enable a mistakenly disabled java test.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9688 from cloud-fan/follow.
---
 .../sql/catalyst/plans/logical/basicOperators.scala    |  8 ++++----
 .../src/main/scala/org/apache/spark/sql/Column.scala   |  3 ++-
 .../src/main/scala/org/apache/spark/sql/Dataset.scala  | 10 +++-------
 .../scala/org/apache/spark/sql/GroupedDataset.scala    |  4 ++--
 .../apache/spark/sql/execution/SparkStrategies.scala   |  2 +-
 .../test/org/apache/spark/sql/JavaDatasetSuite.java    |  1 +
 .../org/apache/spark/sql/DatasetAggregatorSuite.scala  |  4 ++++
 7 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index d9f046efce0b..e2b97b27a6c2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -482,13 +482,13 @@ case class MapPartitions[T, U](
 }
 
 /** Factory for constructing new `AppendColumn` nodes. */
-object AppendColumn {
+object AppendColumns {
   def apply[T, U : Encoder](
       func: T => U,
       tEncoder: ExpressionEncoder[T],
-      child: LogicalPlan): AppendColumn[T, U] = {
+      child: LogicalPlan): AppendColumns[T, U] = {
     val attrs = encoderFor[U].schema.toAttributes
-    new AppendColumn[T, U](func, tEncoder, encoderFor[U], attrs, child)
+    new AppendColumns[T, U](func, tEncoder, encoderFor[U], attrs, child)
   }
 }
 
@@ -497,7 +497,7 @@ object AppendColumn {
  * resulting columns at the end of the input row. tEncoder/uEncoder are used respectively to
  * decode/encode from the JVM object representation expected by `func.`
  */
-case class AppendColumn[T, U](
+case class AppendColumns[T, U](
     func: T => U,
     tEncoder: ExpressionEncoder[T],
     uEncoder: ExpressionEncoder[U],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 929224460dc0..82e9cd7f50a3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -58,10 +58,11 @@ class TypedColumn[-T, U](
   private[sql] def withInputType(
       inputEncoder: ExpressionEncoder[_],
       schema: Seq[Attribute]): TypedColumn[T, U] = {
+    val boundEncoder = inputEncoder.bind(schema).asInstanceOf[ExpressionEncoder[Any]]
     new TypedColumn[T, U] (expr transform {
       case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
         ta.copy(
-          aEncoder = Some(inputEncoder.asInstanceOf[ExpressionEncoder[Any]]),
+          aEncoder = Some(boundEncoder),
           children = schema)
     }, encoder)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index b930e4661c1a..4cc3aa2465f2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -299,7 +299,7 @@ class Dataset[T] private[sql](
    */
   def groupBy[K : Encoder](func: T => K): GroupedDataset[K, T] = {
     val inputPlan = queryExecution.analyzed
-    val withGroupingKey = AppendColumn(func, resolvedTEncoder, inputPlan)
+    val withGroupingKey = AppendColumns(func, resolvedTEncoder, inputPlan)
     val executed = sqlContext.executePlan(withGroupingKey)
 
     new GroupedDataset(
@@ -364,13 +364,11 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def select[U1: Encoder](c1: TypedColumn[T, U1]): Dataset[U1] = {
-    // We use an unbound encoder since the expression will make up its own schema.
-    // TODO: This probably doesn't work if we are relying on reordering of the input class fields.
     new Dataset[U1](
       sqlContext,
       Project(
         c1.withInputType(
-          resolvedTEncoder.bind(queryExecution.analyzed.output),
+          resolvedTEncoder,
           queryExecution.analyzed.output).named :: Nil,
         logicalPlan))
   }
@@ -382,10 +380,8 @@ class Dataset[T] private[sql](
    */
   protected def selectUntyped(columns: TypedColumn[_, _]*): Dataset[_] = {
     val encoders = columns.map(_.encoder)
-    // We use an unbound encoder since the expression will make up its own schema.
-    // TODO: This probably doesn't work if we are relying on reordering of the input class fields.
     val namedColumns =
-      columns.map(_.withInputType(unresolvedTEncoder, queryExecution.analyzed.output).named)
+      columns.map(_.withInputType(resolvedTEncoder, queryExecution.analyzed.output).named)
     val execution = new QueryExecution(sqlContext, Project(namedColumns, logicalPlan))
 
     new Dataset(sqlContext, execution, ExpressionEncoder.tuple(encoders))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index ae1272ae531f..9c16940707de 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -89,7 +89,7 @@ class GroupedDataset[K, T] private[sql](
   }
 
   /**
-   * Applies the given function to each group of data.  For each unique group, the function  will
+   * Applies the given function to each group of data.  For each unique group, the function will
    * be passed the group key and an iterator that contains all of the elements in the group. The
    * function can return an iterator containing elements of an arbitrary type which will be returned
    * as a new [[Dataset]].
@@ -162,7 +162,7 @@ class GroupedDataset[K, T] private[sql](
     val encoders = columns.map(_.encoder)
     val namedColumns =
       columns.map(
-        _.withInputType(resolvedTEncoder.bind(dataAttributes), dataAttributes).named)
+        _.withInputType(resolvedTEncoder, dataAttributes).named)
     val aggregate = Aggregate(groupingAttributes, groupingAttributes ++ namedColumns, logicalPlan)
     val execution = new QueryExecution(sqlContext, aggregate)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index a99ae4674bb1..67201a2c191c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -321,7 +321,7 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
 
       case logical.MapPartitions(f, tEnc, uEnc, output, child) =>
         execution.MapPartitions(f, tEnc, uEnc, output, planLater(child)) :: Nil
-      case logical.AppendColumn(f, tEnc, uEnc, newCol, child) =>
+      case logical.AppendColumns(f, tEnc, uEnc, newCol, child) =>
         execution.AppendColumns(f, tEnc, uEnc, newCol, planLater(child)) :: Nil
       case logical.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, child) =>
         execution.MapGroups(f, kEnc, tEnc, uEnc, grouping, output, planLater(child)) :: Nil
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index 46169ca07d71..eb6fa1e72e27 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -157,6 +157,7 @@ public Integer call(Integer v1, Integer v2) throws Exception {
     Assert.assertEquals(6, reduced);
   }
 
+  @Test
   public void testGroupBy() {
     List<String> data = Arrays.asList("a", "foo", "bar");
     Dataset<String> ds = context.createDataset(data, Encoders.STRING());
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 20896efdfec1..46f9f077fe7f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -161,6 +161,10 @@ class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
       ds.select(ClassInputAgg.toColumn),
       1)
 
+    checkAnswer(
+      ds.select(expr("avg(a)").as[Double], ClassInputAgg.toColumn),
+      (1.0, 1))
+
     checkAnswer(
       ds.groupBy(_.b).agg(ClassInputAgg.toColumn),
       ("one", 1))

From d7b2b97ad67f9700fb8c13422c399f2edb72f770 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 13 Nov 2015 11:25:33 -0800
Subject: [PATCH 675/896] [SPARK-11727][SQL] Split ExpressionEncoder into
 FlatEncoder and ProductEncoder

also add more tests for encoders, and fix bugs that I found:

* when convert array to catalyst array, we can only skip element conversion for native types(e.g. int, long, boolean), not `AtomicType`(String is AtomicType but we need to convert it)
* we should also handle scala `BigDecimal` when convert from catalyst `Decimal`.
* complex map type should be supported

other issues that still in investigation:

* encode java `BigDecimal` and decode it back, seems we will loss precision info.
* when encode case class that defined inside a object, `ClassNotFound` exception will be thrown.

I'll remove unused code in a follow-up PR.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9693 from cloud-fan/split.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |   2 +-
 .../sql/catalyst/encoders/FlatEncoder.scala   |  50 ++
 .../catalyst/encoders/ProductEncoder.scala    | 452 ++++++++++++++++++
 .../sql/catalyst/encoders/RowEncoder.scala    |  58 +--
 .../sql/catalyst/util/DateTimeUtils.scala     |   2 +-
 .../sql/catalyst/util/GenericArrayData.scala  |   2 +-
 .../encoders/ExpressionEncoderSuite.scala     | 259 ++--------
 .../catalyst/encoders/FlatEncoderSuite.scala  |  74 +++
 .../encoders/ProductEncoderSuite.scala        | 123 +++++
 .../org/apache/spark/sql/GroupedDataset.scala |   7 +-
 .../org/apache/spark/sql/SQLImplicits.scala   |  22 +-
 .../org/apache/spark/sql/functions.scala      |   4 +-
 12 files changed, 766 insertions(+), 289 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 6d822261b050..0b3dd351e38e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -75,7 +75,7 @@ trait ScalaReflection {
    *
    * @see SPARK-5281
    */
-  private def localTypeOf[T: TypeTag]: `Type` = typeTag[T].in(mirror).tpe
+  def localTypeOf[T: TypeTag]: `Type` = typeTag[T].in(mirror).tpe
 
   /**
    * Returns the Spark SQL DataType for a given scala type.  Where this is not an exact mapping
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
new file mode 100644
index 000000000000..6d307ab13a9f
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.reflect.ClassTag
+import scala.reflect.runtime.universe.{typeTag, TypeTag}
+
+import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.catalyst.expressions.{Literal, CreateNamedStruct, BoundReference}
+import org.apache.spark.sql.catalyst.ScalaReflection
+
+object FlatEncoder {
+  import ScalaReflection.schemaFor
+  import ScalaReflection.dataTypeFor
+
+  def apply[T : TypeTag]: ExpressionEncoder[T] = {
+    // We convert the not-serializable TypeTag into StructType and ClassTag.
+    val tpe = typeTag[T].tpe
+    val mirror = typeTag[T].mirror
+    val cls = mirror.runtimeClass(tpe)
+    assert(!schemaFor(tpe).dataType.isInstanceOf[StructType])
+
+    val input = BoundReference(0, dataTypeFor(tpe), nullable = true)
+    val toRowExpression = CreateNamedStruct(
+      Literal("value") :: ProductEncoder.extractorFor(input, tpe) :: Nil)
+    val fromRowExpression = ProductEncoder.constructorFor(tpe)
+
+    new ExpressionEncoder[T](
+      toRowExpression.dataType,
+      flat = true,
+      toRowExpression.flatten,
+      fromRowExpression,
+      ClassTag[T](cls))
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
new file mode 100644
index 000000000000..414adb21168e
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -0,0 +1,452 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.util.Utils
+import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.sql.types._
+import org.apache.spark.sql.catalyst.ScalaReflectionLock
+import org.apache.spark.sql.catalyst.ScalaReflection
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, UnresolvedExtractValue}
+import org.apache.spark.sql.catalyst.expressions
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.util.{DateTimeUtils, ArrayBasedMapData, GenericArrayData}
+
+import scala.reflect.ClassTag
+
+object ProductEncoder {
+  import ScalaReflection.universe._
+  import ScalaReflection.localTypeOf
+  import ScalaReflection.dataTypeFor
+  import ScalaReflection.Schema
+  import ScalaReflection.schemaFor
+  import ScalaReflection.arrayClassFor
+
+  def apply[T <: Product : TypeTag]: ExpressionEncoder[T] = {
+    // We convert the not-serializable TypeTag into StructType and ClassTag.
+    val tpe = typeTag[T].tpe
+    val mirror = typeTag[T].mirror
+    val cls = mirror.runtimeClass(tpe)
+
+    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
+    val toRowExpression = extractorFor(inputObject, tpe).asInstanceOf[CreateNamedStruct]
+    val fromRowExpression = constructorFor(tpe)
+
+    new ExpressionEncoder[T](
+      toRowExpression.dataType,
+      flat = false,
+      toRowExpression.flatten,
+      fromRowExpression,
+      ClassTag[T](cls))
+  }
+
+  // The Predef.Map is scala.collection.immutable.Map.
+  // Since the map values can be mutable, we explicitly import scala.collection.Map at here.
+  import scala.collection.Map
+
+  def extractorFor(
+      inputObject: Expression,
+      tpe: `Type`): Expression = ScalaReflectionLock.synchronized {
+    if (!inputObject.dataType.isInstanceOf[ObjectType]) {
+      inputObject
+    } else {
+      tpe match {
+        case t if t <:< localTypeOf[Option[_]] =>
+          val TypeRef(_, _, Seq(optType)) = t
+          optType match {
+            // For primitive types we must manually unbox the value of the object.
+            case t if t <:< definitions.IntTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Integer]), inputObject),
+                "intValue",
+                IntegerType)
+            case t if t <:< definitions.LongTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Long]), inputObject),
+                "longValue",
+                LongType)
+            case t if t <:< definitions.DoubleTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Double]), inputObject),
+                "doubleValue",
+                DoubleType)
+            case t if t <:< definitions.FloatTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Float]), inputObject),
+                "floatValue",
+                FloatType)
+            case t if t <:< definitions.ShortTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Short]), inputObject),
+                "shortValue",
+                ShortType)
+            case t if t <:< definitions.ByteTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Byte]), inputObject),
+                "byteValue",
+                ByteType)
+            case t if t <:< definitions.BooleanTpe =>
+              Invoke(
+                UnwrapOption(ObjectType(classOf[java.lang.Boolean]), inputObject),
+                "booleanValue",
+                BooleanType)
+
+            // For non-primitives, we can just extract the object from the Option and then recurse.
+            case other =>
+              val className: String = optType.erasure.typeSymbol.asClass.fullName
+              val classObj = Utils.classForName(className)
+              val optionObjectType = ObjectType(classObj)
+
+              val unwrapped = UnwrapOption(optionObjectType, inputObject)
+              expressions.If(
+                IsNull(unwrapped),
+                expressions.Literal.create(null, schemaFor(optType).dataType),
+                extractorFor(unwrapped, optType))
+          }
+
+        case t if t <:< localTypeOf[Product] =>
+          val formalTypeArgs = t.typeSymbol.asClass.typeParams
+          val TypeRef(_, _, actualTypeArgs) = t
+          val constructorSymbol = t.member(nme.CONSTRUCTOR)
+          val params = if (constructorSymbol.isMethod) {
+            constructorSymbol.asMethod.paramss
+          } else {
+            // Find the primary constructor, and use its parameter ordering.
+            val primaryConstructorSymbol: Option[Symbol] =
+              constructorSymbol.asTerm.alternatives.find(s =>
+                s.isMethod && s.asMethod.isPrimaryConstructor)
+
+            if (primaryConstructorSymbol.isEmpty) {
+              sys.error("Internal SQL error: Product object did not have a primary constructor.")
+            } else {
+              primaryConstructorSymbol.get.asMethod.paramss
+            }
+          }
+
+          CreateNamedStruct(params.head.flatMap { p =>
+            val fieldName = p.name.toString
+            val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
+            val fieldValue = Invoke(inputObject, fieldName, dataTypeFor(fieldType))
+            expressions.Literal(fieldName) :: extractorFor(fieldValue, fieldType) :: Nil
+          })
+
+        case t if t <:< localTypeOf[Array[_]] =>
+          val TypeRef(_, _, Seq(elementType)) = t
+          toCatalystArray(inputObject, elementType)
+
+        case t if t <:< localTypeOf[Seq[_]] =>
+          val TypeRef(_, _, Seq(elementType)) = t
+          toCatalystArray(inputObject, elementType)
+
+        case t if t <:< localTypeOf[Map[_, _]] =>
+          val TypeRef(_, _, Seq(keyType, valueType)) = t
+
+          val keys =
+            Invoke(
+              Invoke(inputObject, "keysIterator",
+                ObjectType(classOf[scala.collection.Iterator[_]])),
+              "toSeq",
+              ObjectType(classOf[scala.collection.Seq[_]]))
+          val convertedKeys = toCatalystArray(keys, keyType)
+
+          val values =
+            Invoke(
+              Invoke(inputObject, "valuesIterator",
+                ObjectType(classOf[scala.collection.Iterator[_]])),
+              "toSeq",
+              ObjectType(classOf[scala.collection.Seq[_]]))
+          val convertedValues = toCatalystArray(values, valueType)
+
+          val Schema(keyDataType, _) = schemaFor(keyType)
+          val Schema(valueDataType, valueNullable) = schemaFor(valueType)
+          NewInstance(
+            classOf[ArrayBasedMapData],
+            convertedKeys :: convertedValues :: Nil,
+            dataType = MapType(keyDataType, valueDataType, valueNullable))
+
+        case t if t <:< localTypeOf[String] =>
+          StaticInvoke(
+            classOf[UTF8String],
+            StringType,
+            "fromString",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.sql.Timestamp] =>
+          StaticInvoke(
+            DateTimeUtils,
+            TimestampType,
+            "fromJavaTimestamp",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.sql.Date] =>
+          StaticInvoke(
+            DateTimeUtils,
+            DateType,
+            "fromJavaDate",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[BigDecimal] =>
+          StaticInvoke(
+            Decimal,
+            DecimalType.SYSTEM_DEFAULT,
+            "apply",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.math.BigDecimal] =>
+          StaticInvoke(
+            Decimal,
+            DecimalType.SYSTEM_DEFAULT,
+            "apply",
+            inputObject :: Nil)
+
+        case t if t <:< localTypeOf[java.lang.Integer] =>
+          Invoke(inputObject, "intValue", IntegerType)
+        case t if t <:< localTypeOf[java.lang.Long] =>
+          Invoke(inputObject, "longValue", LongType)
+        case t if t <:< localTypeOf[java.lang.Double] =>
+          Invoke(inputObject, "doubleValue", DoubleType)
+        case t if t <:< localTypeOf[java.lang.Float] =>
+          Invoke(inputObject, "floatValue", FloatType)
+        case t if t <:< localTypeOf[java.lang.Short] =>
+          Invoke(inputObject, "shortValue", ShortType)
+        case t if t <:< localTypeOf[java.lang.Byte] =>
+          Invoke(inputObject, "byteValue", ByteType)
+        case t if t <:< localTypeOf[java.lang.Boolean] =>
+          Invoke(inputObject, "booleanValue", BooleanType)
+
+        case other =>
+          throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
+      }
+    }
+  }
+
+  private def toCatalystArray(input: Expression, elementType: `Type`): Expression = {
+    val externalDataType = dataTypeFor(elementType)
+    val Schema(catalystType, nullable) = schemaFor(elementType)
+    if (RowEncoder.isNativeType(catalystType)) {
+      NewInstance(
+        classOf[GenericArrayData],
+        input :: Nil,
+        dataType = ArrayType(catalystType, nullable))
+    } else {
+      MapObjects(extractorFor(_, elementType), input, externalDataType)
+    }
+  }
+
+  def constructorFor(
+      tpe: `Type`,
+      path: Option[Expression] = None): Expression = ScalaReflectionLock.synchronized {
+
+    /** Returns the current path with a sub-field extracted. */
+    def addToPath(part: String): Expression = path
+      .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
+      .getOrElse(UnresolvedAttribute(part))
+
+    /** Returns the current path with a field at ordinal extracted. */
+    def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression = path
+      .map(p => GetInternalRowField(p, ordinal, dataType))
+      .getOrElse(BoundReference(ordinal, dataType, false))
+
+    /** Returns the current path or `BoundReference`. */
+    def getPath: Expression = path.getOrElse(BoundReference(0, schemaFor(tpe).dataType, true))
+
+    tpe match {
+      case t if !dataTypeFor(t).isInstanceOf[ObjectType] => getPath
+
+      case t if t <:< localTypeOf[Option[_]] =>
+        val TypeRef(_, _, Seq(optType)) = t
+        WrapOption(null, constructorFor(optType, path))
+
+      case t if t <:< localTypeOf[java.lang.Integer] =>
+        val boxedType = classOf[java.lang.Integer]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Long] =>
+        val boxedType = classOf[java.lang.Long]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Double] =>
+        val boxedType = classOf[java.lang.Double]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Float] =>
+        val boxedType = classOf[java.lang.Float]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Short] =>
+        val boxedType = classOf[java.lang.Short]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Byte] =>
+        val boxedType = classOf[java.lang.Byte]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.lang.Boolean] =>
+        val boxedType = classOf[java.lang.Boolean]
+        val objectType = ObjectType(boxedType)
+        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
+
+      case t if t <:< localTypeOf[java.sql.Date] =>
+        StaticInvoke(
+          DateTimeUtils,
+          ObjectType(classOf[java.sql.Date]),
+          "toJavaDate",
+          getPath :: Nil,
+          propagateNull = true)
+
+      case t if t <:< localTypeOf[java.sql.Timestamp] =>
+        StaticInvoke(
+          DateTimeUtils,
+          ObjectType(classOf[java.sql.Timestamp]),
+          "toJavaTimestamp",
+          getPath :: Nil,
+          propagateNull = true)
+
+      case t if t <:< localTypeOf[java.lang.String] =>
+        Invoke(getPath, "toString", ObjectType(classOf[String]))
+
+      case t if t <:< localTypeOf[java.math.BigDecimal] =>
+        Invoke(getPath, "toJavaBigDecimal", ObjectType(classOf[java.math.BigDecimal]))
+
+      case t if t <:< localTypeOf[BigDecimal] =>
+        Invoke(getPath, "toBigDecimal", ObjectType(classOf[BigDecimal]))
+
+      case t if t <:< localTypeOf[Array[_]] =>
+        val TypeRef(_, _, Seq(elementType)) = t
+        val primitiveMethod = elementType match {
+          case t if t <:< definitions.IntTpe => Some("toIntArray")
+          case t if t <:< definitions.LongTpe => Some("toLongArray")
+          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
+          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
+          case t if t <:< definitions.ShortTpe => Some("toShortArray")
+          case t if t <:< definitions.ByteTpe => Some("toByteArray")
+          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
+          case _ => None
+        }
+
+        primitiveMethod.map { method =>
+          Invoke(getPath, method, arrayClassFor(elementType))
+        }.getOrElse {
+          Invoke(
+            MapObjects(
+              p => constructorFor(elementType, Some(p)),
+              getPath,
+              schemaFor(elementType).dataType),
+            "array",
+            arrayClassFor(elementType))
+        }
+
+      case t if t <:< localTypeOf[Seq[_]] =>
+        val TypeRef(_, _, Seq(elementType)) = t
+        val arrayData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(elementType, Some(p)),
+              getPath,
+              schemaFor(elementType).dataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        StaticInvoke(
+          scala.collection.mutable.WrappedArray,
+          ObjectType(classOf[Seq[_]]),
+          "make",
+          arrayData :: Nil)
+
+      case t if t <:< localTypeOf[Map[_, _]] =>
+        val TypeRef(_, _, Seq(keyType, valueType)) = t
+
+        val keyData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(keyType, Some(p)),
+              Invoke(getPath, "keyArray", ArrayType(schemaFor(keyType).dataType)),
+              schemaFor(keyType).dataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        val valueData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(valueType, Some(p)),
+              Invoke(getPath, "valueArray", ArrayType(schemaFor(valueType).dataType)),
+              schemaFor(valueType).dataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        StaticInvoke(
+          ArrayBasedMapData,
+          ObjectType(classOf[Map[_, _]]),
+          "toScalaMap",
+          keyData :: valueData :: Nil)
+
+      case t if t <:< localTypeOf[Product] =>
+        val formalTypeArgs = t.typeSymbol.asClass.typeParams
+        val TypeRef(_, _, actualTypeArgs) = t
+        val constructorSymbol = t.member(nme.CONSTRUCTOR)
+        val params = if (constructorSymbol.isMethod) {
+          constructorSymbol.asMethod.paramss
+        } else {
+          // Find the primary constructor, and use its parameter ordering.
+          val primaryConstructorSymbol: Option[Symbol] =
+            constructorSymbol.asTerm.alternatives.find(s =>
+              s.isMethod && s.asMethod.isPrimaryConstructor)
+
+          if (primaryConstructorSymbol.isEmpty) {
+            sys.error("Internal SQL error: Product object did not have a primary constructor.")
+          } else {
+            primaryConstructorSymbol.get.asMethod.paramss
+          }
+        }
+
+        val className: String = t.erasure.typeSymbol.asClass.fullName
+        val cls = Utils.classForName(className)
+
+        val arguments = params.head.zipWithIndex.map { case (p, i) =>
+          val fieldName = p.name.toString
+          val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
+          val dataType = schemaFor(fieldType).dataType
+
+          // For tuples, we based grab the inner fields by ordinal instead of name.
+          if (className startsWith "scala.Tuple") {
+            constructorFor(fieldType, Some(addToPathOrdinal(i, dataType)))
+          } else {
+            constructorFor(fieldType, Some(addToPath(fieldName)))
+          }
+        }
+
+        val newInstance = NewInstance(cls, arguments, propagateNull = false, ObjectType(cls))
+
+        if (path.nonEmpty) {
+          expressions.If(
+            IsNull(getPath),
+            expressions.Literal.create(null, ObjectType(cls)),
+            newInstance
+          )
+        } else {
+          newInstance
+        }
+    }
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index 0b42130a013b..e0be896bb354 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -119,9 +119,17 @@ object RowEncoder {
       CreateStruct(convertedFields)
   }
 
-  private def externalDataTypeFor(dt: DataType): DataType = dt match {
+  /**
+   * Returns true if the value of this data type is same between internal and external.
+   */
+  def isNativeType(dt: DataType): Boolean = dt match {
     case BooleanType | ByteType | ShortType | IntegerType | LongType |
-         FloatType | DoubleType | BinaryType => dt
+         FloatType | DoubleType | BinaryType => true
+    case _ => false
+  }
+
+  private def externalDataTypeFor(dt: DataType): DataType = dt match {
+    case _ if isNativeType(dt) => dt
     case TimestampType => ObjectType(classOf[java.sql.Timestamp])
     case DateType => ObjectType(classOf[java.sql.Date])
     case _: DecimalType => ObjectType(classOf[java.math.BigDecimal])
@@ -137,13 +145,13 @@ object RowEncoder {
       If(
         IsNull(field),
         Literal.create(null, externalDataTypeFor(f.dataType)),
-        constructorFor(BoundReference(i, f.dataType, f.nullable), f.dataType)
+        constructorFor(BoundReference(i, f.dataType, f.nullable))
       )
     }
     CreateExternalRow(fields)
   }
 
-  private def constructorFor(input: Expression, dataType: DataType): Expression = dataType match {
+  private def constructorFor(input: Expression): Expression = input.dataType match {
     case BooleanType | ByteType | ShortType | IntegerType | LongType |
          FloatType | DoubleType | BinaryType => input
 
@@ -170,7 +178,7 @@ object RowEncoder {
     case ArrayType(et, nullable) =>
       val arrayData =
         Invoke(
-          MapObjects(constructorFor(_, et), input, et),
+          MapObjects(constructorFor, input, et),
           "array",
           ObjectType(classOf[Array[_]]))
       StaticInvoke(
@@ -181,10 +189,10 @@ object RowEncoder {
 
     case MapType(kt, vt, valueNullable) =>
       val keyArrayType = ArrayType(kt, false)
-      val keyData = constructorFor(Invoke(input, "keyArray", keyArrayType), keyArrayType)
+      val keyData = constructorFor(Invoke(input, "keyArray", keyArrayType))
 
       val valueArrayType = ArrayType(vt, valueNullable)
-      val valueData = constructorFor(Invoke(input, "valueArray", valueArrayType), valueArrayType)
+      val valueData = constructorFor(Invoke(input, "valueArray", valueArrayType))
 
       StaticInvoke(
         ArrayBasedMapData,
@@ -197,42 +205,8 @@ object RowEncoder {
         If(
           Invoke(input, "isNullAt", BooleanType, Literal(i) :: Nil),
           Literal.create(null, externalDataTypeFor(f.dataType)),
-          constructorFor(getField(input, i, f.dataType), f.dataType))
+          constructorFor(GetInternalRowField(input, i, f.dataType)))
       }
       CreateExternalRow(convertedFields)
   }
-
-  private def getField(
-     row: Expression,
-     ordinal: Int,
-     dataType: DataType): Expression = dataType match {
-    case BooleanType =>
-      Invoke(row, "getBoolean", dataType, Literal(ordinal) :: Nil)
-    case ByteType =>
-      Invoke(row, "getByte", dataType, Literal(ordinal) :: Nil)
-    case ShortType =>
-      Invoke(row, "getShort", dataType, Literal(ordinal) :: Nil)
-    case IntegerType | DateType =>
-      Invoke(row, "getInt", dataType, Literal(ordinal) :: Nil)
-    case LongType | TimestampType =>
-      Invoke(row, "getLong", dataType, Literal(ordinal) :: Nil)
-    case FloatType =>
-      Invoke(row, "getFloat", dataType, Literal(ordinal) :: Nil)
-    case DoubleType =>
-      Invoke(row, "getDouble", dataType, Literal(ordinal) :: Nil)
-    case t: DecimalType =>
-      Invoke(row, "getDecimal", dataType, Seq(ordinal, t.precision, t.scale).map(Literal(_)))
-    case StringType =>
-      Invoke(row, "getUTF8String", dataType, Literal(ordinal) :: Nil)
-    case BinaryType =>
-      Invoke(row, "getBinary", dataType, Literal(ordinal) :: Nil)
-    case CalendarIntervalType =>
-      Invoke(row, "getInterval", dataType, Literal(ordinal) :: Nil)
-    case t: StructType =>
-      Invoke(row, "getStruct", dataType, Literal(ordinal) :: Literal(t.size) :: Nil)
-    case _: ArrayType =>
-      Invoke(row, "getArray", dataType, Literal(ordinal) :: Nil)
-    case _: MapType =>
-      Invoke(row, "getMap", dataType, Literal(ordinal) :: Nil)
-  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index f5fff90e5a54..deff8a5378b9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -110,7 +110,7 @@ object DateTimeUtils {
   }
 
   def stringToTime(s: String): java.util.Date = {
-    var indexOfGMT = s.indexOf("GMT");
+    val indexOfGMT = s.indexOf("GMT")
     if (indexOfGMT != -1) {
       // ISO8601 with a weird time zone specifier (2000-01-01T00:00GMT+01:00)
       val s0 = s.substring(0, indexOfGMT)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
index e9bf7b33e35b..96588bb5dc1b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/GenericArrayData.scala
@@ -23,7 +23,7 @@ import org.apache.spark.unsafe.types.{CalendarInterval, UTF8String}
 
 class GenericArrayData(val array: Array[Any]) extends ArrayData {
 
-  def this(seq: scala.collection.GenIterable[Any]) = this(seq.toArray)
+  def this(seq: Seq[Any]) = this(seq.toArray)
 
   // TODO: This is boxing.  We should specialize.
   def this(primitiveArray: Array[Int]) = this(primitiveArray.toSeq)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index b0dacf7f555e..9fe64b4cf10e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -17,232 +17,27 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
-import scala.collection.mutable.ArrayBuffer
-import scala.reflect.runtime.universe._
+import java.util.Arrays
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.sql.catalyst._
+import org.apache.spark.sql.catalyst.expressions.AttributeReference
 import org.apache.spark.sql.catalyst.util.ArrayData
-import org.apache.spark.sql.types.{StructField, ArrayType}
-
-case class RepeatedStruct(s: Seq[PrimitiveData])
-
-case class NestedArray(a: Array[Array[Int]])
-
-case class BoxedData(
-    intField: java.lang.Integer,
-    longField: java.lang.Long,
-    doubleField: java.lang.Double,
-    floatField: java.lang.Float,
-    shortField: java.lang.Short,
-    byteField: java.lang.Byte,
-    booleanField: java.lang.Boolean)
-
-case class RepeatedData(
-    arrayField: Seq[Int],
-    arrayFieldContainsNull: Seq[java.lang.Integer],
-    mapField: scala.collection.Map[Int, Long],
-    mapFieldNull: scala.collection.Map[Int, java.lang.Long],
-    structField: PrimitiveData)
-
-case class SpecificCollection(l: List[Int])
-
-class ExpressionEncoderSuite extends SparkFunSuite {
-
-  encodeDecodeTest(1)
-  encodeDecodeTest(1L)
-  encodeDecodeTest(1.toDouble)
-  encodeDecodeTest(1.toFloat)
-  encodeDecodeTest(true)
-  encodeDecodeTest(false)
-  encodeDecodeTest(1.toShort)
-  encodeDecodeTest(1.toByte)
-  encodeDecodeTest("hello")
-
-  encodeDecodeTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
-
-  // TODO: Support creating specific subclasses of Seq.
-  ignore("Specific collection types") { encodeDecodeTest(SpecificCollection(1 :: Nil)) }
-
-  encodeDecodeTest(
-    OptionalData(
-      Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
-      Some(PrimitiveData(1, 1, 1, 1, 1, 1, true))))
-
-  encodeDecodeTest(OptionalData(None, None, None, None, None, None, None, None))
-
-  encodeDecodeTest(
-    BoxedData(1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true))
-
-  encodeDecodeTest(
-    BoxedData(null, null, null, null, null, null, null))
-
-  encodeDecodeTest(
-    RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil))
-
-  encodeDecodeTest(
-    RepeatedData(
-      Seq(1, 2),
-      Seq(new Integer(1), null, new Integer(2)),
-      Map(1 -> 2L),
-      Map(1 -> null),
-      PrimitiveData(1, 1, 1, 1, 1, 1, true)))
-
-  encodeDecodeTest(("nullable Seq[Integer]", Seq[Integer](1, null)))
-
-  encodeDecodeTest(("Seq[(String, String)]",
-    Seq(("a", "b"))))
-  encodeDecodeTest(("Seq[(Int, Int)]",
-    Seq((1, 2))))
-  encodeDecodeTest(("Seq[(Long, Long)]",
-    Seq((1L, 2L))))
-  encodeDecodeTest(("Seq[(Float, Float)]",
-    Seq((1.toFloat, 2.toFloat))))
-  encodeDecodeTest(("Seq[(Double, Double)]",
-    Seq((1.toDouble, 2.toDouble))))
-  encodeDecodeTest(("Seq[(Short, Short)]",
-    Seq((1.toShort, 2.toShort))))
-  encodeDecodeTest(("Seq[(Byte, Byte)]",
-    Seq((1.toByte, 2.toByte))))
-  encodeDecodeTest(("Seq[(Boolean, Boolean)]",
-    Seq((true, false))))
-
-  // TODO: Decoding/encoding of complex maps.
-  ignore("complex maps") {
-    encodeDecodeTest(("Map[Int, (String, String)]",
-      Map(1 ->("a", "b"))))
-  }
-
-  encodeDecodeTest(("ArrayBuffer[(String, String)]",
-    ArrayBuffer(("a", "b"))))
-  encodeDecodeTest(("ArrayBuffer[(Int, Int)]",
-    ArrayBuffer((1, 2))))
-  encodeDecodeTest(("ArrayBuffer[(Long, Long)]",
-    ArrayBuffer((1L, 2L))))
-  encodeDecodeTest(("ArrayBuffer[(Float, Float)]",
-    ArrayBuffer((1.toFloat, 2.toFloat))))
-  encodeDecodeTest(("ArrayBuffer[(Double, Double)]",
-    ArrayBuffer((1.toDouble, 2.toDouble))))
-  encodeDecodeTest(("ArrayBuffer[(Short, Short)]",
-    ArrayBuffer((1.toShort, 2.toShort))))
-  encodeDecodeTest(("ArrayBuffer[(Byte, Byte)]",
-    ArrayBuffer((1.toByte, 2.toByte))))
-  encodeDecodeTest(("ArrayBuffer[(Boolean, Boolean)]",
-    ArrayBuffer((true, false))))
-
-  encodeDecodeTest(("Seq[Seq[(Int, Int)]]",
-    Seq(Seq((1, 2)))))
-
-  encodeDecodeTestCustom(("Array[Array[(Int, Int)]]",
-    Array(Array((1, 2)))))
-  { (l, r) => l._2(0)(0) == r._2(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[(Int, Int)]]",
-    Array(Array(Array((1, 2))))))
-  { (l, r) => l._2(0)(0)(0) == r._2(0)(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Array[(Int, Int)]]]",
-    Array(Array(Array(Array((1, 2)))))))
-  { (l, r) => l._2(0)(0)(0)(0) == r._2(0)(0)(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Array[Array[(Int, Int)]]]]",
-    Array(Array(Array(Array(Array((1, 2))))))))
-  { (l, r) => l._2(0)(0)(0)(0)(0) == r._2(0)(0)(0)(0)(0) }
-
-
-  encodeDecodeTestCustom(("Array[Array[Integer]]",
-    Array(Array[Integer](1))))
-  { (l, r) => l._2(0)(0) == r._2(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Int]]",
-    Array(Array(1))))
-  { (l, r) => l._2(0)(0) == r._2(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Int]]",
-    Array(Array(Array(1)))))
-  { (l, r) => l._2(0)(0)(0) == r._2(0)(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Array[Int]]]",
-    Array(Array(Array(Array(1))))))
-  { (l, r) => l._2(0)(0)(0)(0) == r._2(0)(0)(0)(0) }
-
-  encodeDecodeTestCustom(("Array[Array[Array[Array[Int]]]]",
-    Array(Array(Array(Array(Array(1)))))))
-  { (l, r) => l._2(0)(0)(0)(0)(0) == r._2(0)(0)(0)(0)(0) }
-
-  encodeDecodeTest(("Array[Byte] null",
-    null: Array[Byte]))
-  encodeDecodeTestCustom(("Array[Byte]",
-    Array[Byte](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Int] null",
-    null: Array[Int]))
-  encodeDecodeTestCustom(("Array[Int]",
-    Array[Int](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Long] null",
-    null: Array[Long]))
-  encodeDecodeTestCustom(("Array[Long]",
-    Array[Long](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Double] null",
-    null: Array[Double]))
-  encodeDecodeTestCustom(("Array[Double]",
-    Array[Double](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Float] null",
-    null: Array[Float]))
-  encodeDecodeTestCustom(("Array[Float]",
-    Array[Float](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Boolean] null",
-    null: Array[Boolean]))
-  encodeDecodeTestCustom(("Array[Boolean]",
-    Array[Boolean](true, false)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTest(("Array[Short] null",
-    null: Array[Short]))
-  encodeDecodeTestCustom(("Array[Short]",
-    Array[Short](1, 2, 3)))
-    { (l, r) => java.util.Arrays.equals(l._2, r._2) }
-
-  encodeDecodeTestCustom(("java.sql.Timestamp",
-    new java.sql.Timestamp(1)))
-    { (l, r) => l._2.toString == r._2.toString }
-
-  encodeDecodeTestCustom(("java.sql.Date", new java.sql.Date(1)))
-    { (l, r) => l._2.toString == r._2.toString }
-
-  /** Simplified encodeDecodeTestCustom, where the comparison function can be `Object.equals`. */
-  protected def encodeDecodeTest[T : TypeTag](inputData: T) =
-    encodeDecodeTestCustom[T](inputData)((l, r) => l == r)
-
-  /**
-   * Constructs a test that round-trips `t` through an encoder, checking the results to ensure it
-   * matches the original.
-   */
-  protected def encodeDecodeTestCustom[T : TypeTag](
-      inputData: T)(
-      c: (T, T) => Boolean) = {
-    test(s"encode/decode: $inputData - ${inputData.getClass.getName}") {
-      val encoder = try ExpressionEncoder[T]() catch {
-        case e: Exception =>
-          fail(s"Exception thrown generating encoder", e)
-      }
-      val convertedData = encoder.toRow(inputData)
+import org.apache.spark.sql.types.ArrayType
+
+abstract class ExpressionEncoderSuite extends SparkFunSuite {
+  protected def encodeDecodeTest[T](
+      input: T,
+      encoder: ExpressionEncoder[T],
+      testName: String): Unit = {
+    test(s"encode/decode for $testName: $input") {
+      val row = encoder.toRow(input)
       val schema = encoder.schema.toAttributes
       val boundEncoder = encoder.resolve(schema).bind(schema)
-      val convertedBack = try boundEncoder.fromRow(convertedData) catch {
+      val convertedBack = try boundEncoder.fromRow(row) catch {
         case e: Exception =>
           fail(
            s"""Exception thrown while decoding
-              |Converted: $convertedData
+              |Converted: $row
               |Schema: ${schema.mkString(",")}
               |${encoder.schema.treeString}
               |
@@ -252,18 +47,27 @@ class ExpressionEncoderSuite extends SparkFunSuite {
             """.stripMargin, e)
       }
 
-      if (!c(inputData, convertedBack)) {
+      val isCorrect = (input, convertedBack) match {
+        case (b1: Array[Byte], b2: Array[Byte]) => Arrays.equals(b1, b2)
+        case (b1: Array[Int], b2: Array[Int]) => Arrays.equals(b1, b2)
+        case (b1: Array[Array[_]], b2: Array[Array[_]]) =>
+          Arrays.deepEquals(b1.asInstanceOf[Array[AnyRef]], b2.asInstanceOf[Array[AnyRef]])
+        case (b1: Array[_], b2: Array[_]) =>
+          Arrays.equals(b1.asInstanceOf[Array[AnyRef]], b2.asInstanceOf[Array[AnyRef]])
+        case _ => input == convertedBack
+      }
+
+      if (!isCorrect) {
         val types = convertedBack match {
           case c: Product =>
             c.productIterator.filter(_ != null).map(_.getClass.getName).mkString(",")
           case other => other.getClass.getName
         }
 
-
         val encodedData = try {
-          convertedData.toSeq(encoder.schema).zip(encoder.schema).map {
-            case (a: ArrayData, StructField(_, at: ArrayType, _, _)) =>
-              a.toArray[Any](at.elementType).toSeq
+          row.toSeq(encoder.schema).zip(schema).map {
+            case (a: ArrayData, AttributeReference(_, ArrayType(et, _), _, _)) =>
+              a.toArray[Any](et).toSeq
             case (other, _) =>
               other
           }.mkString("[", ",", "]")
@@ -274,7 +78,7 @@ class ExpressionEncoderSuite extends SparkFunSuite {
         fail(
           s"""Encoded/Decoded data does not match input data
              |
-             |in:  $inputData
+             |in:  $input
              |out: $convertedBack
              |types: $types
              |
@@ -282,11 +86,10 @@ class ExpressionEncoderSuite extends SparkFunSuite {
              |Schema: ${schema.mkString(",")}
              |${encoder.schema.treeString}
              |
-             |Extract Expressions:
-             |$boundEncoder
+             |fromRow Expressions:
+             |${boundEncoder.fromRowExpression.treeString}
          """.stripMargin)
-        }
       }
-
+    }
   }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
new file mode 100644
index 000000000000..55821c437068
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
@@ -0,0 +1,74 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import java.sql.{Date, Timestamp}
+
+class FlatEncoderSuite extends ExpressionEncoderSuite {
+  encodeDecodeTest(false, FlatEncoder[Boolean], "primitive boolean")
+  encodeDecodeTest(-3.toByte, FlatEncoder[Byte], "primitive byte")
+  encodeDecodeTest(-3.toShort, FlatEncoder[Short], "primitive short")
+  encodeDecodeTest(-3, FlatEncoder[Int], "primitive int")
+  encodeDecodeTest(-3L, FlatEncoder[Long], "primitive long")
+  encodeDecodeTest(-3.7f, FlatEncoder[Float], "primitive float")
+  encodeDecodeTest(-3.7, FlatEncoder[Double], "primitive double")
+
+  encodeDecodeTest(new java.lang.Boolean(false), FlatEncoder[java.lang.Boolean], "boxed boolean")
+  encodeDecodeTest(new java.lang.Byte(-3.toByte), FlatEncoder[java.lang.Byte], "boxed byte")
+  encodeDecodeTest(new java.lang.Short(-3.toShort), FlatEncoder[java.lang.Short], "boxed short")
+  encodeDecodeTest(new java.lang.Integer(-3), FlatEncoder[java.lang.Integer], "boxed int")
+  encodeDecodeTest(new java.lang.Long(-3L), FlatEncoder[java.lang.Long], "boxed long")
+  encodeDecodeTest(new java.lang.Float(-3.7f), FlatEncoder[java.lang.Float], "boxed float")
+  encodeDecodeTest(new java.lang.Double(-3.7), FlatEncoder[java.lang.Double], "boxed double")
+
+  encodeDecodeTest(BigDecimal("32131413.211321313"), FlatEncoder[BigDecimal], "scala decimal")
+  type JDecimal = java.math.BigDecimal
+  // encodeDecodeTest(new JDecimal("231341.23123"), FlatEncoder[JDecimal], "java decimal")
+
+  encodeDecodeTest("hello", FlatEncoder[String], "string")
+  encodeDecodeTest(Date.valueOf("2012-12-23"), FlatEncoder[Date], "date")
+  encodeDecodeTest(Timestamp.valueOf("2016-01-29 10:00:00"), FlatEncoder[Timestamp], "timestamp")
+  encodeDecodeTest(Array[Byte](13, 21, -23), FlatEncoder[Array[Byte]], "binary")
+
+  encodeDecodeTest(Seq(31, -123, 4), FlatEncoder[Seq[Int]], "seq of int")
+  encodeDecodeTest(Seq("abc", "xyz"), FlatEncoder[Seq[String]], "seq of string")
+  encodeDecodeTest(Seq("abc", null, "xyz"), FlatEncoder[Seq[String]], "seq of string with null")
+  encodeDecodeTest(Seq.empty[Int], FlatEncoder[Seq[Int]], "empty seq of int")
+  encodeDecodeTest(Seq.empty[String], FlatEncoder[Seq[String]], "empty seq of string")
+
+  encodeDecodeTest(Seq(Seq(31, -123), null, Seq(4, 67)),
+    FlatEncoder[Seq[Seq[Int]]], "seq of seq of int")
+  encodeDecodeTest(Seq(Seq("abc", "xyz"), Seq[String](null), null, Seq("1", null, "2")),
+    FlatEncoder[Seq[Seq[String]]], "seq of seq of string")
+
+  encodeDecodeTest(Array(31, -123, 4), FlatEncoder[Array[Int]], "array of int")
+  encodeDecodeTest(Array("abc", "xyz"), FlatEncoder[Array[String]], "array of string")
+  encodeDecodeTest(Array("a", null, "x"), FlatEncoder[Array[String]], "array of string with null")
+  encodeDecodeTest(Array.empty[Int], FlatEncoder[Array[Int]], "empty array of int")
+  encodeDecodeTest(Array.empty[String], FlatEncoder[Array[String]], "empty array of string")
+
+  encodeDecodeTest(Array(Array(31, -123), null, Array(4, 67)),
+    FlatEncoder[Array[Array[Int]]], "array of array of int")
+  encodeDecodeTest(Array(Array("abc", "xyz"), Array[String](null), null, Array("1", null, "2")),
+    FlatEncoder[Array[Array[String]]], "array of array of string")
+
+  encodeDecodeTest(Map(1 -> "a", 2 -> "b"), FlatEncoder[Map[Int, String]], "map")
+  encodeDecodeTest(Map(1 -> "a", 2 -> null), FlatEncoder[Map[Int, String]], "map with null")
+  encodeDecodeTest(Map(1 -> Map("a" -> 1), 2 -> Map("b" -> 2)),
+    FlatEncoder[Map[Int, Map[String, Int]]], "map of map")
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
new file mode 100644
index 000000000000..fda978e7055e
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -0,0 +1,123 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.runtime.universe.TypeTag
+
+import org.apache.spark.sql.catalyst.{OptionalData, PrimitiveData}
+
+case class RepeatedStruct(s: Seq[PrimitiveData])
+
+case class NestedArray(a: Array[Array[Int]]) {
+  override def equals(other: Any): Boolean = other match {
+    case NestedArray(otherArray) =>
+      java.util.Arrays.deepEquals(
+        a.asInstanceOf[Array[AnyRef]],
+        otherArray.asInstanceOf[Array[AnyRef]])
+    case _ => false
+  }
+}
+
+case class BoxedData(
+    intField: java.lang.Integer,
+    longField: java.lang.Long,
+    doubleField: java.lang.Double,
+    floatField: java.lang.Float,
+    shortField: java.lang.Short,
+    byteField: java.lang.Byte,
+    booleanField: java.lang.Boolean)
+
+case class RepeatedData(
+    arrayField: Seq[Int],
+    arrayFieldContainsNull: Seq[java.lang.Integer],
+    mapField: scala.collection.Map[Int, Long],
+    mapFieldNull: scala.collection.Map[Int, java.lang.Long],
+    structField: PrimitiveData)
+
+case class SpecificCollection(l: List[Int])
+
+class ProductEncoderSuite extends ExpressionEncoderSuite {
+
+  productTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
+
+  productTest(
+    OptionalData(Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
+      Some(PrimitiveData(1, 1, 1, 1, 1, 1, true))))
+
+  productTest(OptionalData(None, None, None, None, None, None, None, None))
+
+  productTest(BoxedData(1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true))
+
+  productTest(BoxedData(null, null, null, null, null, null, null))
+
+  productTest(RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil))
+
+  productTest((1, "test", PrimitiveData(1, 1, 1, 1, 1, 1, true)))
+
+  productTest(
+    RepeatedData(
+      Seq(1, 2),
+      Seq(new Integer(1), null, new Integer(2)),
+      Map(1 -> 2L),
+      Map(1 -> null),
+      PrimitiveData(1, 1, 1, 1, 1, 1, true)))
+
+  productTest(NestedArray(Array(Array(1, -2, 3), null, Array(4, 5, -6))))
+
+  productTest(("Seq[(String, String)]",
+    Seq(("a", "b"))))
+  productTest(("Seq[(Int, Int)]",
+    Seq((1, 2))))
+  productTest(("Seq[(Long, Long)]",
+    Seq((1L, 2L))))
+  productTest(("Seq[(Float, Float)]",
+    Seq((1.toFloat, 2.toFloat))))
+  productTest(("Seq[(Double, Double)]",
+    Seq((1.toDouble, 2.toDouble))))
+  productTest(("Seq[(Short, Short)]",
+    Seq((1.toShort, 2.toShort))))
+  productTest(("Seq[(Byte, Byte)]",
+    Seq((1.toByte, 2.toByte))))
+  productTest(("Seq[(Boolean, Boolean)]",
+    Seq((true, false))))
+
+  productTest(("ArrayBuffer[(String, String)]",
+    ArrayBuffer(("a", "b"))))
+  productTest(("ArrayBuffer[(Int, Int)]",
+    ArrayBuffer((1, 2))))
+  productTest(("ArrayBuffer[(Long, Long)]",
+    ArrayBuffer((1L, 2L))))
+  productTest(("ArrayBuffer[(Float, Float)]",
+    ArrayBuffer((1.toFloat, 2.toFloat))))
+  productTest(("ArrayBuffer[(Double, Double)]",
+    ArrayBuffer((1.toDouble, 2.toDouble))))
+  productTest(("ArrayBuffer[(Short, Short)]",
+    ArrayBuffer((1.toShort, 2.toShort))))
+  productTest(("ArrayBuffer[(Byte, Byte)]",
+    ArrayBuffer((1.toByte, 2.toByte))))
+  productTest(("ArrayBuffer[(Boolean, Boolean)]",
+    ArrayBuffer((true, false))))
+
+  productTest(("Seq[Seq[(Int, Int)]]",
+    Seq(Seq((1, 2)))))
+
+  private def productTest[T <: Product : TypeTag](input: T): Unit = {
+    encodeDecodeTest(input, ProductEncoder[T], input.getClass.getSimpleName)
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 9c16940707de..ebcf4c8bfe7e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -22,7 +22,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function._
-import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
+import org.apache.spark.sql.catalyst.encoders.{FlatEncoder, ExpressionEncoder, encoderFor}
 import org.apache.spark.sql.catalyst.expressions.Attribute
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
@@ -56,9 +56,6 @@ class GroupedDataset[K, T] private[sql](
   private val resolvedKEncoder = unresolvedKEncoder.resolve(groupingAttributes)
   private val resolvedTEncoder = unresolvedTEncoder.resolve(dataAttributes)
 
-  /** Encoders for built in aggregations. */
-  private implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
-
   private def logicalPlan = queryExecution.analyzed
   private def sqlContext = queryExecution.sqlContext
 
@@ -211,7 +208,7 @@ class GroupedDataset[K, T] private[sql](
    * Returns a [[Dataset]] that contains a tuple with each key and the number of items present
    * for that key.
    */
-  def count(): Dataset[(K, Long)] = agg(functions.count("*").as[Long])
+  def count(): Dataset[(K, Long)] = agg(functions.count("*").as(FlatEncoder[Long]))
 
   /**
    * Applies the given function to each cogrouped data.  For each unique group, the function will
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index 6da46a5f7ef9..8471eea1b7d9 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -37,17 +37,21 @@ import org.apache.spark.unsafe.types.UTF8String
 abstract class SQLImplicits {
   protected def _sqlContext: SQLContext
 
-  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ExpressionEncoder[T]()
+  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ProductEncoder[T]
 
-  implicit def newIntEncoder: Encoder[Int] = ExpressionEncoder[Int](flat = true)
-  implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder[Long](flat = true)
-  implicit def newDoubleEncoder: Encoder[Double] = ExpressionEncoder[Double](flat = true)
-  implicit def newFloatEncoder: Encoder[Float] = ExpressionEncoder[Float](flat = true)
-  implicit def newByteEncoder: Encoder[Byte] = ExpressionEncoder[Byte](flat = true)
-  implicit def newShortEncoder: Encoder[Short] = ExpressionEncoder[Short](flat = true)
-  implicit def newBooleanEncoder: Encoder[Boolean] = ExpressionEncoder[Boolean](flat = true)
-  implicit def newStringEncoder: Encoder[String] = ExpressionEncoder[String](flat = true)
+  implicit def newIntEncoder: Encoder[Int] = FlatEncoder[Int]
+  implicit def newLongEncoder: Encoder[Long] = FlatEncoder[Long]
+  implicit def newDoubleEncoder: Encoder[Double] = FlatEncoder[Double]
+  implicit def newFloatEncoder: Encoder[Float] = FlatEncoder[Float]
+  implicit def newByteEncoder: Encoder[Byte] = FlatEncoder[Byte]
+  implicit def newShortEncoder: Encoder[Short] = FlatEncoder[Short]
+  implicit def newBooleanEncoder: Encoder[Boolean] = FlatEncoder[Boolean]
+  implicit def newStringEncoder: Encoder[String] = FlatEncoder[String]
 
+  /**
+   * Creates a [[Dataset]] from an RDD.
+   * @since 1.6.0
+   */
   implicit def rddToDatasetHolder[T : Encoder](rdd: RDD[T]): DatasetHolder[T] = {
     DatasetHolder(_sqlContext.createDataset(rdd))
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 53cc6e0cda11..95158de710ac 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -26,7 +26,7 @@ import scala.util.Try
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.{SqlParser, ScalaReflection}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, Star}
-import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
+import org.apache.spark.sql.catalyst.encoders.FlatEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.BroadcastHint
@@ -267,7 +267,7 @@ object functions extends LegacyFunctions {
    * @since 1.3.0
    */
   def count(columnName: String): TypedColumn[Any, Long] =
-    count(Column(columnName)).as(ExpressionEncoder[Long](flat = true))
+    count(Column(columnName)).as(FlatEncoder[Long])
 
   /**
    * Aggregate function: returns the number of distinct items in a group.

From 2d2411faa2dd1b7312c4277b2dd9e5678195cfbb Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Fri, 13 Nov 2015 13:09:28 -0800
Subject: [PATCH 676/896] [SPARK-11672][ML] Set active SQLContext in
 MLlibTestSparkContext.beforeAll

Still saw some error messages caused by `SQLContext.getOrCreate`:

https://amplab.cs.berkeley.edu/jenkins/job/Spark-Master-SBT/3997/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.3,label=spark-test/testReport/junit/org.apache.spark.ml.util/JavaDefaultReadWriteSuite/testDefaultReadWrite/

This PR sets the active SQLContext in beforeAll, which is not automatically set in `new SQLContext`. This makes `SQLContext.getOrCreate` return the right SQLContext.

cc: yhuai

Author: Xiangrui Meng <meng@databricks.com>

Closes #9694 from mengxr/SPARK-11672.3.
---
 .../main/scala/org/apache/spark/ml/util/ReadWrite.scala    | 7 +++++--
 .../apache/spark/mllib/util/MLlibTestSparkContext.scala    | 1 +
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index 85f888c9f2f6..ca896ed6106c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -48,8 +48,11 @@ private[util] sealed trait BaseReadWrite {
   /**
    * Returns the user-specified SQL context or the default.
    */
-  protected final def sqlContext: SQLContext = optionSQLContext.getOrElse {
-    SQLContext.getOrCreate(SparkContext.getOrCreate())
+  protected final def sqlContext: SQLContext = {
+    if (optionSQLContext.isEmpty) {
+      optionSQLContext = Some(SQLContext.getOrCreate(SparkContext.getOrCreate()))
+    }
+    optionSQLContext.get
   }
 
   /** Returns the [[SparkContext]] underlying [[sqlContext]] */
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala b/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
index 998ee4818655..378139593b26 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/util/MLlibTestSparkContext.scala
@@ -34,6 +34,7 @@ trait MLlibTestSparkContext extends BeforeAndAfterAll { self: Suite =>
     sc = new SparkContext(conf)
     SQLContext.clearActive()
     sqlContext = new SQLContext(sc)
+    SQLContext.setActive(sqlContext)
   }
 
   override def afterAll() {

From 912b94363bb113ab14024a45f17a4d2b82a09e66 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Fri, 13 Nov 2015 13:14:25 -0800
Subject: [PATCH 677/896] [SPARK-11336] Add links to example codes

https://issues.apache.org/jira/browse/SPARK-11336

mengxr I add a hyperlink of Spark on Github and a hint of their existences in Spark code repo in each code example. I remove the config key for changing the example code dir, since we assume all examples  should be in spark/examples.

The hyperlink, though we cannot use it now, since the Spark v1.6.0 has not been released yet, can be used after the release. So it is not a problem.

I add some screen shots, so you can get an instant feeling.

<img width="949" alt="screen shot 2015-10-27 at 10 47 18 pm" src="https://cloud.githubusercontent.com/assets/2637239/10780634/bd20e072-7cfc-11e5-8960-def4fc62a8ea.png">

<img width="1144" alt="screen shot 2015-10-27 at 10 47 31 pm" src="https://cloud.githubusercontent.com/assets/2637239/10780636/c3f6e180-7cfc-11e5-80b2-233589f4a9a3.png">

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9320 from yinxusen/SPARK-11336.
---
 docs/_plugins/include_example.rb | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/docs/_plugins/include_example.rb b/docs/_plugins/include_example.rb
index 6ee63a5ac69d..549f81fe1b1b 100644
--- a/docs/_plugins/include_example.rb
+++ b/docs/_plugins/include_example.rb
@@ -28,7 +28,7 @@ def initialize(tag_name, markup, tokens)
  
     def render(context)
       site = context.registers[:site]
-      config_dir = (site.config['code_dir'] || '../examples/src/main').sub(/^\//,'')
+      config_dir = '../examples/src/main'
       @code_dir = File.join(site.source, config_dir)
 
       clean_markup = @markup.strip
@@ -38,7 +38,12 @@ def render(context)
       code = File.open(@file).read.encode("UTF-8")
       code = select_lines(code)
  
-      Pygments.highlight(code, :lexer => @lang)
+      rendered_code = Pygments.highlight(code, :lexer => @lang)
+
+      hint = "<div><small>Find full example code at " \
+        "\"examples/src/main/#{clean_markup}\" in the Spark repo.</small></div>"
+
+      rendered_code + hint
     end
  
     # Trim the code block so as to have the same indention, regardless of their positions in the

From bdfbc1dcaf121a1a1239857adcf54cdfe82c26dc Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Fri, 13 Nov 2015 13:19:04 -0800
Subject: [PATCH 678/896] [MINOR][ML] remove MLlibTestsSparkContext from
 ImpuritySuite

ImpuritySuite doesn't need SparkContext.

Author: Xiangrui Meng <meng@databricks.com>

Closes #9698 from mengxr/remove-mllib-test-context-in-impurity-suite.
---
 .../test/scala/org/apache/spark/mllib/tree/ImpuritySuite.scala | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mllib/src/test/scala/org/apache/spark/mllib/tree/ImpuritySuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/tree/ImpuritySuite.scala
index 49aff21fe791..14152cdd63bc 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/tree/ImpuritySuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/tree/ImpuritySuite.scala
@@ -19,12 +19,11 @@ package org.apache.spark.mllib.tree
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.mllib.tree.impurity.{EntropyAggregator, GiniAggregator}
-import org.apache.spark.mllib.util.MLlibTestSparkContext
 
 /**
  * Test suites for [[GiniAggregator]] and [[EntropyAggregator]].
  */
-class ImpuritySuite extends SparkFunSuite with MLlibTestSparkContext {
+class ImpuritySuite extends SparkFunSuite {
   test("Gini impurity does not support negative labels") {
     val gini = new GiniAggregator(2)
     intercept[IllegalArgumentException] {

From c939c70ac1ab6a26d9fda0a99c4e837f7e5a7935 Mon Sep 17 00:00:00 2001
From: nitin goyal <nitin.goyal@guavus.com>
Date: Fri, 13 Nov 2015 18:09:08 -0800
Subject: [PATCH 679/896] [SPARK-7970] Skip closure cleaning for SQL operations

Also introduces new spark private API in RDD.scala with name 'mapPartitionsInternal' which doesn't closure cleans the RDD elements.

Author: nitin goyal <nitin.goyal@guavus.com>
Author: nitin.goyal <nitin.goyal@guavus.com>

Closes #9253 from nitin2goyal/master.
---
 .../main/scala/org/apache/spark/rdd/RDD.scala  | 18 ++++++++++++++++++
 .../columnar/InMemoryColumnarTableScan.scala   |  4 ++--
 .../apache/spark/sql/execution/Exchange.scala  |  6 +++---
 .../apache/spark/sql/execution/Generate.scala  |  4 ++--
 .../aggregate/SortBasedAggregate.scala         |  2 +-
 .../spark/sql/execution/basicOperators.scala   | 16 ++++++++--------
 .../joins/BroadcastLeftSemiJoinHash.scala      |  4 ++--
 .../sql/execution/joins/CartesianProduct.scala |  2 +-
 .../org/apache/spark/sql/execution/sort.scala  |  2 +-
 9 files changed, 38 insertions(+), 20 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/RDD.scala b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
index 800ef53cbef0..2aeb5eeaad32 100644
--- a/core/src/main/scala/org/apache/spark/rdd/RDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/RDD.scala
@@ -705,6 +705,24 @@ abstract class RDD[T: ClassTag](
       preservesPartitioning)
   }
 
+  /**
+   * [performance] Spark's internal mapPartitions method which skips closure cleaning. It is a
+   * performance API to be used carefully only if we are sure that the RDD elements are
+   * serializable and don't require closure cleaning.
+   *
+   * @param preservesPartitioning indicates whether the input function preserves the partitioner,
+   * which should be `false` unless this is a pair RDD and the input function doesn't modify
+   * the keys.
+   */
+  private[spark] def mapPartitionsInternal[U: ClassTag](
+      f: Iterator[T] => Iterator[U],
+      preservesPartitioning: Boolean = false): RDD[U] = withScope {
+    new MapPartitionsRDD(
+      this,
+      (context: TaskContext, index: Int, iter: Iterator[T]) => f(iter),
+      preservesPartitioning)
+  }
+
   /**
    * Return a new RDD by applying a function to each partition of this RDD, while tracking the index
    * of the original partition.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index 7eb1ad7cd819..2cface61e59c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -125,7 +125,7 @@ private[sql] case class InMemoryRelation(
 
   private def buildBuffers(): Unit = {
     val output = child.output
-    val cached = child.execute().mapPartitions { rowIterator =>
+    val cached = child.execute().mapPartitionsInternal { rowIterator =>
       new Iterator[CachedBatch] {
         def next(): CachedBatch = {
           val columnBuilders = output.map { attribute =>
@@ -292,7 +292,7 @@ private[sql] case class InMemoryColumnarTableScan(
     val relOutput = relation.output
     val buffers = relation.cachedColumnBuffers
 
-    buffers.mapPartitions { cachedBatchIterator =>
+    buffers.mapPartitionsInternal { cachedBatchIterator =>
       val partitionFilter = newPredicate(
         partitionFilters.reduceOption(And).getOrElse(Literal(true)),
         schema)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index bc252d98e714..a161cf0a3185 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -168,7 +168,7 @@ case class Exchange(
       case RangePartitioning(sortingExpressions, numPartitions) =>
         // Internally, RangePartitioner runs a job on the RDD that samples keys to compute
         // partition bounds. To get accurate samples, we need to copy the mutable keys.
-        val rddForSampling = rdd.mapPartitions { iter =>
+        val rddForSampling = rdd.mapPartitionsInternal { iter =>
           val mutablePair = new MutablePair[InternalRow, Null]()
           iter.map(row => mutablePair.update(row.copy(), null))
         }
@@ -200,12 +200,12 @@ case class Exchange(
     }
     val rddWithPartitionIds: RDD[Product2[Int, InternalRow]] = {
       if (needToCopyObjectsBeforeShuffle(part, serializer)) {
-        rdd.mapPartitions { iter =>
+        rdd.mapPartitionsInternal { iter =>
           val getPartitionKey = getPartitionKeyExtractor()
           iter.map { row => (part.getPartition(getPartitionKey(row)), row.copy()) }
         }
       } else {
-        rdd.mapPartitions { iter =>
+        rdd.mapPartitionsInternal { iter =>
           val getPartitionKey = getPartitionKeyExtractor()
           val mutablePair = new MutablePair[Int, InternalRow]()
           iter.map { row => mutablePair.update(part.getPartition(getPartitionKey(row)), row) }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
index 78e33d9f233a..54b8cb58285c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Generate.scala
@@ -59,7 +59,7 @@ case class Generate(
   protected override def doExecute(): RDD[InternalRow] = {
     // boundGenerator.terminate() should be triggered after all of the rows in the partition
     if (join) {
-      child.execute().mapPartitions { iter =>
+      child.execute().mapPartitionsInternal { iter =>
         val generatorNullRow = InternalRow.fromSeq(Seq.fill[Any](generator.elementTypes.size)(null))
         val joinedRow = new JoinedRow
 
@@ -79,7 +79,7 @@ case class Generate(
         }
       }
     } else {
-      child.execute().mapPartitions { iter =>
+      child.execute().mapPartitionsInternal { iter =>
         iter.flatMap(row => boundGenerator.eval(row)) ++
         LazyIterator(() => boundGenerator.terminate())
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
index c8ccbb933df6..ee982453c328 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/SortBasedAggregate.scala
@@ -69,7 +69,7 @@ case class SortBasedAggregate(
   protected override def doExecute(): RDD[InternalRow] = attachTree(this, "execute") {
     val numInputRows = longMetric("numInputRows")
     val numOutputRows = longMetric("numOutputRows")
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       // Because the constructor of an aggregation iterator will read at least the first row,
       // we need to get the value of iter.hasNext first.
       val hasInput = iter.hasNext
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index ed82c9a6a377..07925c62cd38 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -43,7 +43,7 @@ case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan)
 
   protected override def doExecute(): RDD[InternalRow] = {
     val numRows = longMetric("numRows")
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val project = UnsafeProjection.create(projectList, child.output,
         subexpressionEliminationEnabled)
       iter.map { row =>
@@ -67,7 +67,7 @@ case class Filter(condition: Expression, child: SparkPlan) extends UnaryNode {
   protected override def doExecute(): RDD[InternalRow] = {
     val numInputRows = longMetric("numInputRows")
     val numOutputRows = longMetric("numOutputRows")
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val predicate = newPredicate(condition, child.output)
       iter.filter { row =>
         numInputRows += 1
@@ -161,11 +161,11 @@ case class Limit(limit: Int, child: SparkPlan)
 
   protected override def doExecute(): RDD[InternalRow] = {
     val rdd: RDD[_ <: Product2[Boolean, InternalRow]] = if (sortBasedShuffleOn) {
-      child.execute().mapPartitions { iter =>
+      child.execute().mapPartitionsInternal { iter =>
         iter.take(limit).map(row => (false, row.copy()))
       }
     } else {
-      child.execute().mapPartitions { iter =>
+      child.execute().mapPartitionsInternal { iter =>
         val mutablePair = new MutablePair[Boolean, InternalRow]()
         iter.take(limit).map(row => mutablePair.update(false, row))
       }
@@ -173,7 +173,7 @@ case class Limit(limit: Int, child: SparkPlan)
     val part = new HashPartitioner(1)
     val shuffled = new ShuffledRDD[Boolean, InternalRow, InternalRow](rdd, part)
     shuffled.setSerializer(new SparkSqlSerializer(child.sqlContext.sparkContext.getConf))
-    shuffled.mapPartitions(_.take(limit).map(_._2))
+    shuffled.mapPartitionsInternal(_.take(limit).map(_._2))
   }
 }
 
@@ -294,7 +294,7 @@ case class MapPartitions[T, U](
     child: SparkPlan) extends UnaryNode {
 
   override protected def doExecute(): RDD[InternalRow] = {
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val tBoundEncoder = tEncoder.bind(child.output)
       func(iter.map(tBoundEncoder.fromRow)).map(uEncoder.toRow)
     }
@@ -318,7 +318,7 @@ case class AppendColumns[T, U](
   override def output: Seq[Attribute] = child.output ++ newColumns
 
   override protected def doExecute(): RDD[InternalRow] = {
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val tBoundEncoder = tEncoder.bind(child.output)
       val combiner = GenerateUnsafeRowJoiner.create(tEncoder.schema, uEncoder.schema)
       iter.map { row =>
@@ -350,7 +350,7 @@ case class MapGroups[K, T, U](
     Seq(groupingAttributes.map(SortOrder(_, Ascending)))
 
   override protected def doExecute(): RDD[InternalRow] = {
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val grouped = GroupedIterator(iter, groupingAttributes, child.output)
       val groupKeyEncoder = kEncoder.bind(groupingAttributes)
       val groupDataEncoder = tEncoder.bind(child.output)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
index c5cd6a2fd637..004407b2e692 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastLeftSemiJoinHash.scala
@@ -54,7 +54,7 @@ case class BroadcastLeftSemiJoinHash(
       val hashSet = buildKeyHashSet(input.toIterator, SQLMetrics.nullLongMetric)
       val broadcastedRelation = sparkContext.broadcast(hashSet)
 
-      left.execute().mapPartitions { streamIter =>
+      left.execute().mapPartitionsInternal { streamIter =>
         hashSemiJoin(streamIter, numLeftRows, broadcastedRelation.value, numOutputRows)
       }
     } else {
@@ -62,7 +62,7 @@ case class BroadcastLeftSemiJoinHash(
         HashedRelation(input.toIterator, SQLMetrics.nullLongMetric, rightKeyGenerator, input.size)
       val broadcastedRelation = sparkContext.broadcast(hashRelation)
 
-      left.execute().mapPartitions { streamIter =>
+      left.execute().mapPartitionsInternal { streamIter =>
         val hashedRelation = broadcastedRelation.value
         hashedRelation match {
           case unsafe: UnsafeHashedRelation =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
index 0243e196dbc3..f467519b802a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
@@ -46,7 +46,7 @@ case class CartesianProduct(left: SparkPlan, right: SparkPlan) extends BinaryNod
       row.copy()
     }
 
-    leftResults.cartesian(rightResults).mapPartitions { iter =>
+    leftResults.cartesian(rightResults).mapPartitionsInternal { iter =>
       val joinedRow = new JoinedRow
       iter.map { r =>
         numOutputRows += 1
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
index 47fe70ab154e..52ef00ef5b28 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
@@ -47,7 +47,7 @@ case class Sort(
     if (global) OrderedDistribution(sortOrder) :: Nil else UnspecifiedDistribution :: Nil
 
   protected override def doExecute(): RDD[InternalRow] = attachTree(this, "sort") {
-    child.execute().mapPartitions( { iterator =>
+    child.execute().mapPartitionsInternal( { iterator =>
       val ordering = newOrdering(sortOrder, child.output)
       val sorter = new ExternalSorter[InternalRow, Null, InternalRow](
         TaskContext.get(), ordering = Some(ordering))

From 139c15b624c88b376ffdd05d78795295c8c4fc17 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Sat, 14 Nov 2015 18:36:01 +0800
Subject: [PATCH 680/896] [SPARK-11694][SQL] Parquet logical types are not
 being tested properly

All the physical types are properly tested at `ParquetIOSuite` but logical type mapping is not being tested.

Author: hyukjinkwon <gurwls223@gmail.com>
Author: Hyukjin Kwon <gurwls223@gmail.com>

Closes #9660 from HyukjinKwon/SPARK-11694.
---
 .../datasources/parquet/ParquetIOSuite.scala  | 39 ++++++++++++++-----
 .../datasources/parquet/ParquetTest.scala     | 17 ++++++++
 2 files changed, 47 insertions(+), 9 deletions(-)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 82a42d68fedc..78df363ade5c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -91,6 +91,33 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
+  test("SPARK-11694 Parquet logical types are not being tested properly") {
+    val parquetSchema = MessageTypeParser.parseMessageType(
+      """message root {
+        |  required int32 a(INT_8);
+        |  required int32 b(INT_16);
+        |  required int32 c(DATE);
+        |  required int32 d(DECIMAL(1,0));
+        |  required int64 e(DECIMAL(10,0));
+        |  required binary f(UTF8);
+        |  required binary g(ENUM);
+        |  required binary h(DECIMAL(32,0));
+        |  required fixed_len_byte_array(32) i(DECIMAL(32,0));
+        |}
+      """.stripMargin)
+
+    val expectedSparkTypes = Seq(ByteType, ShortType, DateType, DecimalType(1, 0),
+      DecimalType(10, 0), StringType, StringType, DecimalType(32, 0), DecimalType(32, 0))
+
+    withTempPath { location =>
+      val path = new Path(location.getCanonicalPath)
+      val conf = sparkContext.hadoopConfiguration
+      writeMetadata(parquetSchema, path, conf)
+      val sparkTypes = sqlContext.read.parquet(path.toString).schema.map(_.dataType)
+      assert(sparkTypes === expectedSparkTypes)
+    }
+  }
+
   test("string") {
     val data = (1 to 4).map(i => Tuple1(i.toString))
     // Property spark.sql.parquet.binaryAsString shouldn't affect Parquet files written by Spark SQL
@@ -374,16 +401,10 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       """.stripMargin)
 
     withTempPath { location =>
-      val extraMetadata = Collections.singletonMap(
-        CatalystReadSupport.SPARK_METADATA_KEY, sparkSchema.toString)
-      val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, "Spark")
+      val extraMetadata = Map(CatalystReadSupport.SPARK_METADATA_KEY -> sparkSchema.toString)
       val path = new Path(location.getCanonicalPath)
-
-      ParquetFileWriter.writeMetadataFile(
-        sparkContext.hadoopConfiguration,
-        path,
-        Collections.singletonList(
-          new Footer(path, new ParquetMetadata(fileMetadata, Collections.emptyList()))))
+      val conf = sparkContext.hadoopConfiguration
+      writeMetadata(parquetSchema, path, conf, extraMetadata)
 
       assertResult(sqlContext.read.parquet(path.toString).schema) {
         StructType(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
index 8ffb01fc5b58..fdd7697c91f5 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetTest.scala
@@ -19,6 +19,8 @@ package org.apache.spark.sql.execution.datasources.parquet
 
 import java.io.File
 
+import org.apache.parquet.schema.MessageType
+
 import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.TypeTag
@@ -117,6 +119,21 @@ private[sql] trait ParquetTest extends SQLTestUtils {
     ParquetFileWriter.writeMetadataFile(configuration, path, Seq(footer).asJava)
   }
 
+  /**
+   * This is an overloaded version of `writeMetadata` above to allow writing customized
+   * Parquet schema.
+   */
+  protected def writeMetadata(
+      parquetSchema: MessageType, path: Path, configuration: Configuration,
+      extraMetadata: Map[String, String] = Map.empty[String, String]): Unit = {
+    val extraMetadataAsJava = extraMetadata.asJava
+    val createdBy = s"Apache Spark ${org.apache.spark.SPARK_VERSION}"
+    val fileMetadata = new FileMetaData(parquetSchema, extraMetadataAsJava, createdBy)
+    val parquetMetadata = new ParquetMetadata(fileMetadata, Seq.empty[BlockMetaData].asJava)
+    val footer = new Footer(path, parquetMetadata)
+    ParquetFileWriter.writeMetadataFile(configuration, path, Seq(footer).asJava)
+  }
+
   protected def readAllFootersWithoutSummaryFiles(
       path: Path, configuration: Configuration): Seq[Footer] = {
     val fs = path.getFileSystem(configuration)

From 9a73b33a9a440d7312b92df9f6a9b9e17917b582 Mon Sep 17 00:00:00 2001
From: Kai Jiang <jiangkai@gmail.com>
Date: Sat, 14 Nov 2015 11:59:37 +0000
Subject: [PATCH 681/896] [MINOR][DOCS] typo in docs/configuration.md

`<\code>` end tag missing backslash in
docs/configuration.md{L308-L339}

ref #8795

Author: Kai Jiang <jiangkai@gmail.com>

Closes #9715 from vectorijk/minor-typo-docs.
---
 docs/configuration.md | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/docs/configuration.md b/docs/configuration.md
index c276e8e90dec..d961f43acf4a 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -305,7 +305,7 @@ Apart from these, the following properties are also available, and may be useful
   <td>daily</td>
   <td>
     Set the time interval by which the executor logs will be rolled over.
-    Rolling is disabled by default. Valid values are <code>daily</code>, <code>hourly<code>, <code>minutely<code> or
+    Rolling is disabled by default. Valid values are <code>daily</code>, <code>hourly</code>, <code>minutely</code> or
     any interval in seconds. See <code>spark.executor.logs.rolling.maxRetainedFiles</code>
     for automatic cleaning of old logs.
   </td>
@@ -330,13 +330,13 @@ Apart from these, the following properties are also available, and may be useful
   <td><code>spark.python.profile</code></td>
   <td>false</td>
   <td>
-    Enable profiling in Python worker, the profile result will show up by <code>sc.show_profiles()<code>,
+    Enable profiling in Python worker, the profile result will show up by <code>sc.show_profiles()</code>,
     or it will be displayed before the driver exiting. It also can be dumped into disk by
-    <code>sc.dump_profiles(path)<code>. If some of the profile results had been displayed manually,
+    <code>sc.dump_profiles(path)</code>. If some of the profile results had been displayed manually,
     they will not be displayed automatically before driver exiting.
 
-    By default the <code>pyspark.profiler.BasicProfiler<code> will be used, but this can be overridden by
-    passing a profiler class in as a parameter to the <code>SparkContext<code> constructor.
+    By default the <code>pyspark.profiler.BasicProfiler</code> will be used, but this can be overridden by
+    passing a profiler class in as a parameter to the <code>SparkContext</code> constructor.
   </td>
 </tr>
 <tr>

From 9461f5ee80e51fd709d6f573c333936cb3c2acc5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Lipt=C3=A1k?= <gliptak@gmail.com>
Date: Sat, 14 Nov 2015 12:02:02 +0000
Subject: [PATCH 682/896] =?UTF-8?q?[SPARK-11573]=20Correct=20'reflective?=
 =?UTF-8?q?=20access=20of=20structural=20type=20member=20meth=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…od should be enabled' Scala warnings

Author: Gábor Lipták <gliptak@gmail.com>

Closes #9550 from gliptak/SPARK-11573.
---
 .../apache/spark/streaming/receiver/BlockGeneratorSuite.scala    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
index 2f11b255f110..92ad9fe52b77 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/receiver/BlockGeneratorSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.streaming.receiver
 
 import scala.collection.mutable
+import scala.language.reflectiveCalls
 
 import org.scalatest.BeforeAndAfter
 import org.scalatest.Matchers._

From 22e96b87fb0a0eb4f2f1a8fc29a742ceabff952a Mon Sep 17 00:00:00 2001
From: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>
Date: Sat, 14 Nov 2015 13:38:53 +0000
Subject: [PATCH 683/896] Typo in comment: use 2 seconds instead of 1

Use 2 seconds batch size as duration specified in JavaStreamingContext constructor is 2000 ms

Author: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>

Closes #9714 from RohanBhanderi/patch-2.
---
 .../org/apache/spark/examples/streaming/JavaKafkaWordCount.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/src/main/java/org/apache/spark/examples/streaming/JavaKafkaWordCount.java b/examples/src/main/java/org/apache/spark/examples/streaming/JavaKafkaWordCount.java
index 16ae9a3319ee..337f8ffb5bfb 100644
--- a/examples/src/main/java/org/apache/spark/examples/streaming/JavaKafkaWordCount.java
+++ b/examples/src/main/java/org/apache/spark/examples/streaming/JavaKafkaWordCount.java
@@ -66,7 +66,7 @@ public static void main(String[] args) {
 
     StreamingExamples.setStreamingLogLevels();
     SparkConf sparkConf = new SparkConf().setAppName("JavaKafkaWordCount");
-    // Create the context with a 1 second batch size
+    // Create the context with 2 seconds batch size
     JavaStreamingContext jssc = new JavaStreamingContext(sparkConf, new Duration(2000));
 
     int numThreads = Integer.parseInt(args[3]);

From d83c2f9f0b08d6d5d369d9fae04cdb15448e7f0d Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Sat, 14 Nov 2015 21:04:18 -0800
Subject: [PATCH 684/896] [SPARK-11736][SQL] Add monotonically_increasing_id to
 function registry.

https://issues.apache.org/jira/browse/SPARK-11736

Author: Yin Huai <yhuai@databricks.com>

Closes #9703 from yhuai/MonotonicallyIncreasingID.
---
 .../apache/spark/sql/catalyst/analysis/FunctionRegistry.scala | 3 ++-
 .../scala/org/apache/spark/sql/ColumnExpressionSuite.scala    | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index 870808aa560e..a8f4d257acd0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -281,7 +281,8 @@ object FunctionRegistry {
     expression[Sha1]("sha1"),
     expression[Sha2]("sha2"),
     expression[SparkPartitionID]("spark_partition_id"),
-    expression[InputFileName]("input_file_name")
+    expression[InputFileName]("input_file_name"),
+    expression[MonotonicallyIncreasingID]("monotonically_increasing_id")
   )
 
   val builtin: SimpleFunctionRegistry = {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
index 010df2a34158..8674da7a79c8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
@@ -563,6 +563,10 @@ class ColumnExpressionSuite extends QueryTest with SharedSQLContext {
       df.select(monotonicallyIncreasingId()),
       Row(0L) :: Row(1L) :: Row((1L << 33) + 0L) :: Row((1L << 33) + 1L) :: Nil
     )
+    checkAnswer(
+      df.select(expr("monotonically_increasing_id()")),
+      Row(0L) :: Row(1L) :: Row((1L << 33) + 0L) :: Row((1L << 33) + 1L) :: Nil
+    )
   }
 
   test("sparkPartitionId") {

From d22fc10887fdc6a86f6122648a823d0d37d4d795 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sun, 15 Nov 2015 10:33:53 -0800
Subject: [PATCH 685/896] [SPARK-11734][SQL] Rename TungstenProject -> Project,
 TungstenSort -> Sort

I didn't remove the old Sort operator, since we still use it in randomized tests. I moved it into test module and renamed it ReferenceSort.

Author: Reynold Xin <rxin@databricks.com>

Closes #9700 from rxin/SPARK-11734.
---
 .../apache/spark/sql/execution/Exchange.scala |  7 +-
 .../sql/execution/{sort.scala => Sort.scala}  | 55 +-----------
 .../spark/sql/execution/SparkPlanner.scala    |  2 +-
 .../spark/sql/execution/SparkStrategies.scala | 16 +---
 .../spark/sql/execution/basicOperators.scala  |  2 +-
 .../datasources/DataSourceStrategy.scala      |  2 +-
 .../spark/sql/ColumnExpressionSuite.scala     |  4 +-
 .../spark/sql/execution/PlannerSuite.scala    |  6 +-
 .../spark/sql/execution/ReferenceSort.scala   | 61 +++++++++++++
 .../execution/RowFormatConvertersSuite.scala  |  4 +-
 .../spark/sql/execution/SortSuite.scala       | 69 +++++++++++++--
 .../sql/execution/TungstenSortSuite.scala     | 86 -------------------
 .../execution/metric/SQLMetricsSuite.scala    | 12 +--
 .../execution/HiveTypeCoercionSuite.scala     |  4 +-
 .../ParquetHadoopFsRelationSuite.scala        |  2 +-
 15 files changed, 148 insertions(+), 184 deletions(-)
 rename sql/core/src/main/scala/org/apache/spark/sql/execution/{sort.scala => Sort.scala} (65%)
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/ReferenceSort.scala
 delete mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
index a161cf0a3185..62cbc518e02a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Exchange.scala
@@ -51,7 +51,7 @@ case class Exchange(
     }
 
     val simpleNodeName = if (tungstenMode) "TungstenExchange" else "Exchange"
-    s"${simpleNodeName}${extraInfo}"
+    s"$simpleNodeName$extraInfo"
   }
 
   /**
@@ -475,10 +475,7 @@ private[sql] case class EnsureRequirements(sqlContext: SQLContext) extends Rule[
       if (requiredOrdering.nonEmpty) {
         // If child.outputOrdering is [a, b] and requiredOrdering is [a], we do not need to sort.
         if (requiredOrdering != child.outputOrdering.take(requiredOrdering.length)) {
-          sqlContext.planner.BasicOperators.getSortOperator(
-            requiredOrdering,
-            global = false,
-            child)
+          Sort(requiredOrdering, global = false, child = child)
         } else {
           child
         }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Sort.scala
similarity index 65%
rename from sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/Sort.scala
index 52ef00ef5b28..24207cb46fd2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/sort.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Sort.scala
@@ -17,68 +17,22 @@
 
 package org.apache.spark.sql.execution
 
+import org.apache.spark.{InternalAccumulator, SparkEnv, TaskContext}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.errors._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.physical.{Distribution, OrderedDistribution, UnspecifiedDistribution}
 import org.apache.spark.sql.execution.metric.SQLMetrics
-import org.apache.spark.sql.types.StructType
-import org.apache.spark.util.CompletionIterator
-import org.apache.spark.util.collection.ExternalSorter
-import org.apache.spark.{InternalAccumulator, SparkEnv, TaskContext}
-
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// This file defines various sort operators.
-////////////////////////////////////////////////////////////////////////////////////////////////////
 
 /**
- * Performs a sort, spilling to disk as needed.
- * @param global when true performs a global sort of all partitions by shuffling the data first
- *               if necessary.
- */
-case class Sort(
-    sortOrder: Seq[SortOrder],
-    global: Boolean,
-    child: SparkPlan)
-  extends UnaryNode {
-
-  override def requiredChildDistribution: Seq[Distribution] =
-    if (global) OrderedDistribution(sortOrder) :: Nil else UnspecifiedDistribution :: Nil
-
-  protected override def doExecute(): RDD[InternalRow] = attachTree(this, "sort") {
-    child.execute().mapPartitionsInternal( { iterator =>
-      val ordering = newOrdering(sortOrder, child.output)
-      val sorter = new ExternalSorter[InternalRow, Null, InternalRow](
-        TaskContext.get(), ordering = Some(ordering))
-      sorter.insertAll(iterator.map(r => (r.copy(), null)))
-      val baseIterator = sorter.iterator.map(_._1)
-      val context = TaskContext.get()
-      context.taskMetrics().incDiskBytesSpilled(sorter.diskBytesSpilled)
-      context.taskMetrics().incMemoryBytesSpilled(sorter.memoryBytesSpilled)
-      context.internalMetricsToAccumulators(
-        InternalAccumulator.PEAK_EXECUTION_MEMORY).add(sorter.peakMemoryUsedBytes)
-      // TODO(marmbrus): The complex type signature below thwarts inference for no reason.
-      CompletionIterator[InternalRow, Iterator[InternalRow]](baseIterator, sorter.stop())
-    }, preservesPartitioning = true)
-  }
-
-  override def output: Seq[Attribute] = child.output
-
-  override def outputOrdering: Seq[SortOrder] = sortOrder
-}
-
-/**
- * Optimized version of [[Sort]] that operates on binary data (implemented as part of
- * Project Tungsten).
+ * Performs (external) sorting.
  *
  * @param global when true performs a global sort of all partitions by shuffling the data first
  *               if necessary.
  * @param testSpillFrequency Method for configuring periodic spilling in unit tests. If set, will
  *                           spill every `frequency` records.
  */
-
-case class TungstenSort(
+case class Sort(
     sortOrder: Seq[SortOrder],
     global: Boolean,
     child: SparkPlan,
@@ -107,7 +61,7 @@ case class TungstenSort(
     val dataSize = longMetric("dataSize")
     val spillSize = longMetric("spillSize")
 
-    child.execute().mapPartitions { iter =>
+    child.execute().mapPartitionsInternal { iter =>
       val ordering = newOrdering(sortOrder, childOutput)
 
       // The comparator for comparing prefix
@@ -143,5 +97,4 @@ case class TungstenSort(
       sortedIterator
     }
   }
-
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
index b7c5476346b2..6e9a4df82824 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanner.scala
@@ -80,7 +80,7 @@ class SparkPlanner(val sqlContext: SQLContext) extends SparkStrategies {
       filterCondition.map(Filter(_, scan)).getOrElse(scan)
     } else {
       val scan = scanBuilder((projectSet ++ filterSet).toSeq)
-      TungstenProject(projectList, filterCondition.map(Filter(_, scan)).getOrElse(scan))
+      Project(projectList, filterCondition.map(Filter(_, scan)).getOrElse(scan))
     }
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 67201a2c191c..3d4ce633c07c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -302,16 +302,6 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
   object BasicOperators extends Strategy {
     def numPartitions: Int = self.numPartitions
 
-    /**
-     * Picks an appropriate sort operator.
-     *
-     * @param global when true performs a global sort of all partitions by shuffling the data first
-     *               if necessary.
-     */
-    def getSortOperator(sortExprs: Seq[SortOrder], global: Boolean, child: SparkPlan): SparkPlan = {
-      execution.TungstenSort(sortExprs, global, child)
-    }
-
     def apply(plan: LogicalPlan): Seq[SparkPlan] = plan match {
       case r: RunnableCommand => ExecutedCommand(r) :: Nil
 
@@ -339,11 +329,11 @@ private[sql] abstract class SparkStrategies extends QueryPlanner[SparkPlan] {
       case logical.SortPartitions(sortExprs, child) =>
         // This sort only sorts tuples within a partition. Its requiredDistribution will be
         // an UnspecifiedDistribution.
-        getSortOperator(sortExprs, global = false, planLater(child)) :: Nil
+        execution.Sort(sortExprs, global = false, child = planLater(child)) :: Nil
       case logical.Sort(sortExprs, global, child) =>
-        getSortOperator(sortExprs, global, planLater(child)):: Nil
+        execution.Sort(sortExprs, global, planLater(child)) :: Nil
       case logical.Project(projectList, child) =>
-        execution.TungstenProject(projectList, planLater(child)) :: Nil
+        execution.Project(projectList, planLater(child)) :: Nil
       case logical.Filter(condition, child) =>
         execution.Filter(condition, planLater(child)) :: Nil
       case e @ logical.Expand(_, _, child) =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index 07925c62cd38..e79092efdaa3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -30,7 +30,7 @@ import org.apache.spark.util.random.PoissonSampler
 import org.apache.spark.{HashPartitioner, SparkEnv}
 
 
-case class TungstenProject(projectList: Seq[NamedExpression], child: SparkPlan) extends UnaryNode {
+case class Project(projectList: Seq[NamedExpression], child: SparkPlan) extends UnaryNode {
 
   override private[sql] lazy val metrics = Map(
     "numRows" -> SQLMetrics.createLongMetric(sparkContext, "number of rows"))
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 824c89a90eb8..9bbbfa7c77cb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -343,7 +343,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
         requestedColumns,
         scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
         relation.relation)
-      execution.TungstenProject(
+      execution.Project(
         projects, filterCondition.map(execution.Filter(_, scan)).getOrElse(scan))
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
index 8674da7a79c8..3eae3f6d8506 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql
 import org.apache.spark.sql.catalyst.expressions.NamedExpression
 import org.scalatest.Matchers._
 
-import org.apache.spark.sql.execution.TungstenProject
+import org.apache.spark.sql.execution.Project
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
@@ -619,7 +619,7 @@ class ColumnExpressionSuite extends QueryTest with SharedSQLContext {
 
     def checkNumProjects(df: DataFrame, expectedNumProjects: Int): Unit = {
       val projects = df.queryExecution.executedPlan.collect {
-        case tungstenProject: TungstenProject => tungstenProject
+        case tungstenProject: Project => tungstenProject
       }
       assert(projects.size === expectedNumProjects)
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index 8c41d79dae81..be53ec3e271c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -365,7 +365,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.isEmpty) {
+    if (outputPlan.collect { case s: Sort => true }.isEmpty) {
       fail(s"Sort should have been added:\n$outputPlan")
     }
   }
@@ -381,7 +381,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.nonEmpty) {
+    if (outputPlan.collect { case s: Sort => true }.nonEmpty) {
       fail(s"No sorts should have been added:\n$outputPlan")
     }
   }
@@ -398,7 +398,7 @@ class PlannerSuite extends SharedSQLContext {
     )
     val outputPlan = EnsureRequirements(sqlContext).apply(inputPlan)
     assertDistributionRequirementsAreSatisfied(outputPlan)
-    if (outputPlan.collect { case s: TungstenSort => true; case s: Sort => true }.isEmpty) {
+    if (outputPlan.collect { case s: Sort => true }.isEmpty) {
       fail(s"Sort should have been added:\n$outputPlan")
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ReferenceSort.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ReferenceSort.scala
new file mode 100644
index 000000000000..9575d26fd123
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ReferenceSort.scala
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution
+
+import org.apache.spark.{InternalAccumulator, TaskContext}
+import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.InternalRow
+import org.apache.spark.sql.catalyst.errors._
+import org.apache.spark.sql.catalyst.expressions.{Attribute, SortOrder}
+import org.apache.spark.sql.catalyst.plans.physical._
+import org.apache.spark.util.CompletionIterator
+import org.apache.spark.util.collection.ExternalSorter
+
+
+/**
+ * A reference sort implementation used to compare against our normal sort.
+ */
+case class ReferenceSort(
+    sortOrder: Seq[SortOrder],
+    global: Boolean,
+    child: SparkPlan)
+  extends UnaryNode {
+
+  override def requiredChildDistribution: Seq[Distribution] =
+    if (global) OrderedDistribution(sortOrder) :: Nil else UnspecifiedDistribution :: Nil
+
+  protected override def doExecute(): RDD[InternalRow] = attachTree(this, "sort") {
+    child.execute().mapPartitions( { iterator =>
+      val ordering = newOrdering(sortOrder, child.output)
+      val sorter = new ExternalSorter[InternalRow, Null, InternalRow](
+        TaskContext.get(), ordering = Some(ordering))
+      sorter.insertAll(iterator.map(r => (r.copy(), null)))
+      val baseIterator = sorter.iterator.map(_._1)
+      val context = TaskContext.get()
+      context.taskMetrics().incDiskBytesSpilled(sorter.diskBytesSpilled)
+      context.taskMetrics().incMemoryBytesSpilled(sorter.memoryBytesSpilled)
+      context.internalMetricsToAccumulators(
+        InternalAccumulator.PEAK_EXECUTION_MEMORY).add(sorter.peakMemoryUsedBytes)
+      CompletionIterator[InternalRow, Iterator[InternalRow]](baseIterator, sorter.stop())
+    }, preservesPartitioning = true)
+  }
+
+  override def output: Seq[Attribute] = child.output
+
+  override def outputOrdering: Seq[SortOrder] = sortOrder
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
index b3fceeab64cf..6876ab0f02b1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/RowFormatConvertersSuite.scala
@@ -33,9 +33,9 @@ class RowFormatConvertersSuite extends SparkPlanTest with SharedSQLContext {
     case c: ConvertToSafe => c
   }
 
-  private val outputsSafe = Sort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
+  private val outputsSafe = ReferenceSort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
   assert(!outputsSafe.outputsUnsafeRows)
-  private val outputsUnsafe = TungstenSort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
+  private val outputsUnsafe = Sort(Nil, false, PhysicalRDD(Seq.empty, null, "name"))
   assert(outputsUnsafe.outputsUnsafeRows)
 
   test("planner should insert unsafe->safe conversions when required") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
index 847c188a3033..e5d34be4c65e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/SortSuite.scala
@@ -17,15 +17,22 @@
 
 package org.apache.spark.sql.execution
 
-import org.apache.spark.sql.Row
+import scala.util.Random
+
+import org.apache.spark.AccumulatorSuite
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.test.SharedSQLContext
+import org.apache.spark.sql.types._
+import org.apache.spark.sql.{RandomDataGenerator, Row}
+
 
+/**
+ * Test sorting. Many of the test cases generate random data and compares the sorted result with one
+ * sorted by a reference implementation ([[ReferenceSort]]).
+ */
 class SortSuite extends SparkPlanTest with SharedSQLContext {
   import testImplicits.localSeqToDataFrameHolder
 
-  // This test was originally added as an example of how to use [[SparkPlanTest]];
-  // it's not designed to be a comprehensive test of ExternalSort.
   test("basic sorting using ExternalSort") {
 
     val input = Seq(
@@ -36,14 +43,66 @@ class SortSuite extends SparkPlanTest with SharedSQLContext {
 
     checkAnswer(
       input.toDF("a", "b", "c"),
-      Sort('a.asc :: 'b.asc :: Nil, global = true, _: SparkPlan),
+      (child: SparkPlan) => Sort('a.asc :: 'b.asc :: Nil, global = true, child = child),
       input.sortBy(t => (t._1, t._2)).map(Row.fromTuple),
       sortAnswers = false)
 
     checkAnswer(
       input.toDF("a", "b", "c"),
-      Sort('b.asc :: 'a.asc :: Nil, global = true, _: SparkPlan),
+      (child: SparkPlan) => Sort('b.asc :: 'a.asc :: Nil, global = true, child = child),
       input.sortBy(t => (t._2, t._1)).map(Row.fromTuple),
       sortAnswers = false)
   }
+
+  test("sort followed by limit") {
+    checkThatPlansAgree(
+      (1 to 100).map(v => Tuple1(v)).toDF("a"),
+      (child: SparkPlan) => Limit(10, Sort('a.asc :: Nil, global = true, child = child)),
+      (child: SparkPlan) => Limit(10, ReferenceSort('a.asc :: Nil, global = true, child)),
+      sortAnswers = false
+    )
+  }
+
+  test("sorting does not crash for large inputs") {
+    val sortOrder = 'a.asc :: Nil
+    val stringLength = 1024 * 1024 * 2
+    checkThatPlansAgree(
+      Seq(Tuple1("a" * stringLength), Tuple1("b" * stringLength)).toDF("a").repartition(1),
+      Sort(sortOrder, global = true, _: SparkPlan, testSpillFrequency = 1),
+      ReferenceSort(sortOrder, global = true, _: SparkPlan),
+      sortAnswers = false
+    )
+  }
+
+  test("sorting updates peak execution memory") {
+    AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "unsafe external sort") {
+      checkThatPlansAgree(
+        (1 to 100).map(v => Tuple1(v)).toDF("a"),
+        (child: SparkPlan) => Sort('a.asc :: Nil, global = true, child = child),
+        (child: SparkPlan) => ReferenceSort('a.asc :: Nil, global = true, child),
+        sortAnswers = false)
+    }
+  }
+
+  // Test sorting on different data types
+  for (
+    dataType <- DataTypeTestUtils.atomicTypes ++ Set(NullType);
+    nullable <- Seq(true, false);
+    sortOrder <- Seq('a.asc :: Nil, 'a.desc :: Nil);
+    randomDataGenerator <- RandomDataGenerator.forType(dataType, nullable)
+  ) {
+    test(s"sorting on $dataType with nullable=$nullable, sortOrder=$sortOrder") {
+      val inputData = Seq.fill(1000)(randomDataGenerator())
+      val inputDf = sqlContext.createDataFrame(
+        sparkContext.parallelize(Random.shuffle(inputData).map(v => Row(v))),
+        StructType(StructField("a", dataType, nullable = true) :: Nil)
+      )
+      checkThatPlansAgree(
+        inputDf,
+        p => ConvertToSafe(Sort(sortOrder, global = true, p: SparkPlan, testSpillFrequency = 23)),
+        ReferenceSort(sortOrder, global = true, _: SparkPlan),
+        sortAnswers = false
+      )
+    }
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
deleted file mode 100644
index 7c860d1d58d5..000000000000
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/TungstenSortSuite.scala
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.execution
-
-import scala.util.Random
-
-import org.apache.spark.AccumulatorSuite
-import org.apache.spark.sql.{RandomDataGenerator, Row, SQLConf}
-import org.apache.spark.sql.catalyst.dsl.expressions._
-import org.apache.spark.sql.test.SharedSQLContext
-import org.apache.spark.sql.types._
-
-/**
- * A test suite that generates randomized data to test the [[TungstenSort]] operator.
- */
-class TungstenSortSuite extends SparkPlanTest with SharedSQLContext {
-  import testImplicits.localSeqToDataFrameHolder
-
-  test("sort followed by limit") {
-    checkThatPlansAgree(
-      (1 to 100).map(v => Tuple1(v)).toDF("a"),
-      (child: SparkPlan) => Limit(10, TungstenSort('a.asc :: Nil, true, child)),
-      (child: SparkPlan) => Limit(10, Sort('a.asc :: Nil, global = true, child)),
-      sortAnswers = false
-    )
-  }
-
-  test("sorting does not crash for large inputs") {
-    val sortOrder = 'a.asc :: Nil
-    val stringLength = 1024 * 1024 * 2
-    checkThatPlansAgree(
-      Seq(Tuple1("a" * stringLength), Tuple1("b" * stringLength)).toDF("a").repartition(1),
-      TungstenSort(sortOrder, global = true, _: SparkPlan, testSpillFrequency = 1),
-      Sort(sortOrder, global = true, _: SparkPlan),
-      sortAnswers = false
-    )
-  }
-
-  test("sorting updates peak execution memory") {
-    AccumulatorSuite.verifyPeakExecutionMemorySet(sparkContext, "unsafe external sort") {
-      checkThatPlansAgree(
-        (1 to 100).map(v => Tuple1(v)).toDF("a"),
-        (child: SparkPlan) => TungstenSort('a.asc :: Nil, true, child),
-        (child: SparkPlan) => Sort('a.asc :: Nil, global = true, child),
-        sortAnswers = false)
-    }
-  }
-
-  // Test sorting on different data types
-  for (
-    dataType <- DataTypeTestUtils.atomicTypes ++ Set(NullType);
-    nullable <- Seq(true, false);
-    sortOrder <- Seq('a.asc :: Nil, 'a.desc :: Nil);
-    randomDataGenerator <- RandomDataGenerator.forType(dataType, nullable)
-  ) {
-    test(s"sorting on $dataType with nullable=$nullable, sortOrder=$sortOrder") {
-      val inputData = Seq.fill(1000)(randomDataGenerator())
-      val inputDf = sqlContext.createDataFrame(
-        sparkContext.parallelize(Random.shuffle(inputData).map(v => Row(v))),
-        StructType(StructField("a", dataType, nullable = true) :: Nil)
-      )
-      checkThatPlansAgree(
-        inputDf,
-        plan => ConvertToSafe(
-          TungstenSort(sortOrder, global = true, plan: SparkPlan, testSpillFrequency = 23)),
-        Sort(sortOrder, global = true, _: SparkPlan),
-        sortAnswers = false
-      )
-    }
-  }
-}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
index 486bfbbd7088..5e2b4154dd7c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala
@@ -114,17 +114,7 @@ class SQLMetricsSuite extends SparkFunSuite with SharedSQLContext {
     // PhysicalRDD(nodeId = 1) -> Project(nodeId = 0)
     val df = person.select('name)
     testSparkPlanMetrics(df, 1, Map(
-      0L ->("TungstenProject", Map(
-        "number of rows" -> 2L)))
-    )
-  }
-
-  test("TungstenProject metrics") {
-    // Assume the execution plan is
-    // PhysicalRDD(nodeId = 1) -> TungstenProject(nodeId = 0)
-    val df = person.select('name)
-    testSparkPlanMetrics(df, 1, Map(
-      0L ->("TungstenProject", Map(
+      0L ->("Project", Map(
         "number of rows" -> 2L)))
     )
   }
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
index 4cf4e1389029..5bd323ea096a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveTypeCoercionSuite.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.sql.hive.execution
 
 import org.apache.spark.sql.catalyst.expressions.{Cast, EqualTo}
-import org.apache.spark.sql.execution.TungstenProject
+import org.apache.spark.sql.execution.Project
 import org.apache.spark.sql.hive.test.TestHive
 
 /**
@@ -44,7 +44,7 @@ class HiveTypeCoercionSuite extends HiveComparisonTest {
   test("[SPARK-2210] boolean cast on boolean value should be removed") {
     val q = "select cast(cast(key=0 as boolean) as boolean) from src"
     val project = TestHive.sql(q).queryExecution.executedPlan.collect {
-      case e: TungstenProject => e
+      case e: Project => e
     }.head
 
     // No cast expression introduced
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
index b6db6225805a..e866493ee6c9 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/ParquetHadoopFsRelationSuite.scala
@@ -151,7 +151,7 @@ class ParquetHadoopFsRelationSuite extends HadoopFsRelationTest {
       val df = sqlContext.read.parquet(path).filter('a === 0).select('b)
       val physicalPlan = df.queryExecution.executedPlan
 
-      assert(physicalPlan.collect { case p: execution.TungstenProject => p }.length === 1)
+      assert(physicalPlan.collect { case p: execution.Project => p }.length === 1)
       assert(physicalPlan.collect { case p: execution.Filter => p }.length === 1)
     }
   }

From 64e55511033afb6ef42be142eb371bfbc31f5230 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Sun, 15 Nov 2015 13:23:05 -0800
Subject: [PATCH 686/896] [SPARK-11672][ML] set active SQLContext in
 JavaDefaultReadWriteSuite

The same as #9694, but for Java test suite. yhuai

Author: Xiangrui Meng <meng@databricks.com>

Closes #9719 from mengxr/SPARK-11672.4.
---
 .../apache/spark/ml/util/JavaDefaultReadWriteSuite.java    | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
index c39538014be8..01ff1ea65861 100644
--- a/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
+++ b/mllib/src/test/java/org/apache/spark/ml/util/JavaDefaultReadWriteSuite.java
@@ -32,17 +32,23 @@
 public class JavaDefaultReadWriteSuite {
 
   JavaSparkContext jsc = null;
+  SQLContext sqlContext = null;
   File tempDir = null;
 
   @Before
   public void setUp() {
     jsc = new JavaSparkContext("local[2]", "JavaDefaultReadWriteSuite");
+    SQLContext.clearActive();
+    sqlContext = new SQLContext(jsc);
+    SQLContext.setActive(sqlContext);
     tempDir = Utils.createTempDir(
       System.getProperty("java.io.tmpdir"), "JavaDefaultReadWriteSuite");
   }
 
   @After
   public void tearDown() {
+    sqlContext = null;
+    SQLContext.clearActive();
     if (jsc != null) {
       jsc.stop();
       jsc = null;
@@ -64,7 +70,6 @@ public void testDefaultReadWrite() throws IOException {
     } catch (IOException e) {
       // expected
     }
-    SQLContext sqlContext = new SQLContext(jsc);
     instance.write().context(sqlContext).overwrite().save(outputPath);
     MyParams newInstance = MyParams.load(outputPath);
     Assert.assertEquals("UID should match.", instance.uid(), newInstance.uid());

From 3e2e1873b2762d07e49de8f9ea709bf3fa2d171c Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Sun, 15 Nov 2015 13:59:59 -0800
Subject: [PATCH 687/896] [SPARK-11738] [SQL] Making ArrayType orderable

https://issues.apache.org/jira/browse/SPARK-11738

Author: Yin Huai <yhuai@databricks.com>

Closes #9718 from yhuai/makingArrayOrderable.
---
 .../sql/catalyst/analysis/CheckAnalysis.scala |  32 +----
 .../expressions/codegen/CodeGenerator.scala   |  43 ++++++
 .../expressions/collectionOperations.scala    |   2 +
 .../sql/catalyst/expressions/ordering.scala   |   6 +
 .../spark/sql/catalyst/util/TypeUtils.scala   |   1 +
 .../spark/sql/types/AbstractDataType.scala    |   1 +
 .../apache/spark/sql/types/ArrayType.scala    |  48 +++++++
 .../analysis/AnalysisErrorSuite.scala         |  37 ++++--
 .../ExpressionTypeCheckingSuite.scala         |  32 ++---
 .../sql/catalyst/analysis/TestRelations.scala |   3 +
 .../expressions/CodeGenerationSuite.scala     |  36 -----
 .../catalyst/expressions/OrderingSuite.scala  | 124 ++++++++++++++++++
 .../spark/sql/DataFrameFunctionsSuite.scala   |  12 +-
 .../execution/AggregationQuerySuite.scala     |  52 ++++++++
 14 files changed, 335 insertions(+), 94 deletions(-)
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/OrderingSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
index 5a4b0c1e39ce..7b2c93d63d67 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/CheckAnalysis.scala
@@ -137,32 +137,14 @@ trait CheckAnalysis {
               case e => e.children.foreach(checkValidAggregateExpression)
             }
 
-            def checkSupportedGroupingDataType(
-                expressionString: String,
-                dataType: DataType): Unit = dataType match {
-              case BinaryType =>
-                failAnalysis(s"expression $expressionString cannot be used in " +
-                  s"grouping expression because it is in binary type or its inner field is " +
-                  s"in binary type")
-              case a: ArrayType =>
-                failAnalysis(s"expression $expressionString cannot be used in " +
-                  s"grouping expression because it is in array type or its inner field is " +
-                  s"in array type")
-              case m: MapType =>
-                failAnalysis(s"expression $expressionString cannot be used in " +
-                  s"grouping expression because it is in map type or its inner field is " +
-                  s"in map type")
-              case s: StructType =>
-                s.fields.foreach { f =>
-                  checkSupportedGroupingDataType(expressionString, f.dataType)
-                }
-              case udt: UserDefinedType[_] =>
-                checkSupportedGroupingDataType(expressionString, udt.sqlType)
-              case _ => // OK
-            }
-
             def checkValidGroupingExprs(expr: Expression): Unit = {
-              checkSupportedGroupingDataType(expr.prettyString, expr.dataType)
+              // Check if the data type of expr is orderable.
+              if (!RowOrdering.isOrderable(expr.dataType)) {
+                failAnalysis(
+                  s"expression ${expr.prettyString} cannot be used as a grouping expression " +
+                    s"because its data type ${expr.dataType.simpleString} is not a orderable " +
+                    s"data type.")
+              }
 
               if (!expr.deterministic) {
                 // This is just a sanity check, our analysis rule PullOutNondeterministic should
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index ccd91d3549b5..1718cfbd3533 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -267,6 +267,49 @@ class CodeGenContext {
     case dt: DataType if isPrimitiveType(dt) => s"($c1 > $c2 ? 1 : $c1 < $c2 ? -1 : 0)"
     case BinaryType => s"org.apache.spark.sql.catalyst.util.TypeUtils.compareBinary($c1, $c2)"
     case NullType => "0"
+    case array: ArrayType =>
+      val elementType = array.elementType
+      val elementA = freshName("elementA")
+      val isNullA = freshName("isNullA")
+      val elementB = freshName("elementB")
+      val isNullB = freshName("isNullB")
+      val compareFunc = freshName("compareArray")
+      val minLength = freshName("minLength")
+      val funcCode: String =
+        s"""
+          public int $compareFunc(ArrayData a, ArrayData b) {
+            int lengthA = a.numElements();
+            int lengthB = b.numElements();
+            int $minLength = (lengthA > lengthB) ? lengthB : lengthA;
+            for (int i = 0; i < $minLength; i++) {
+              boolean $isNullA = a.isNullAt(i);
+              boolean $isNullB = b.isNullAt(i);
+              if ($isNullA && $isNullB) {
+                // Nothing
+              } else if ($isNullA) {
+                return -1;
+              } else if ($isNullB) {
+                return 1;
+              } else {
+                ${javaType(elementType)} $elementA = ${getValue("a", elementType, "i")};
+                ${javaType(elementType)} $elementB = ${getValue("b", elementType, "i")};
+                int comp = ${genComp(elementType, elementA, elementB)};
+                if (comp != 0) {
+                  return comp;
+                }
+              }
+            }
+
+            if (lengthA < lengthB) {
+              return -1;
+            } else if (lengthA > lengthB) {
+              return 1;
+            }
+            return 0;
+          }
+        """
+      addNewFunction(compareFunc, funcCode)
+      s"this.$compareFunc($c1, $c2)"
     case schema: StructType =>
       val comparisons = GenerateOrdering.genComparisons(this, schema)
       val compareFunc = freshName("compareStruct")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
index 2cf19b939f73..741ad1f3efd8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
@@ -68,6 +68,7 @@ case class SortArray(base: Expression, ascendingOrder: Expression)
   private lazy val lt: Comparator[Any] = {
     val ordering = base.dataType match {
       case _ @ ArrayType(n: AtomicType, _) => n.ordering.asInstanceOf[Ordering[Any]]
+      case _ @ ArrayType(a: ArrayType, _) => a.interpretedOrdering.asInstanceOf[Ordering[Any]]
       case _ @ ArrayType(s: StructType, _) => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
     }
 
@@ -90,6 +91,7 @@ case class SortArray(base: Expression, ascendingOrder: Expression)
   private lazy val gt: Comparator[Any] = {
     val ordering = base.dataType match {
       case _ @ ArrayType(n: AtomicType, _) => n.ordering.asInstanceOf[Ordering[Any]]
+      case _ @ ArrayType(a: ArrayType, _) => a.interpretedOrdering.asInstanceOf[Ordering[Any]]
       case _ @ ArrayType(s: StructType, _) => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
     }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ordering.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ordering.scala
index 6407c73bc97d..6112259fed61 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ordering.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ordering.scala
@@ -48,6 +48,10 @@ class InterpretedOrdering(ordering: Seq[SortOrder]) extends Ordering[InternalRow
             dt.ordering.asInstanceOf[Ordering[Any]].compare(left, right)
           case dt: AtomicType if order.direction == Descending =>
             dt.ordering.asInstanceOf[Ordering[Any]].reverse.compare(left, right)
+          case a: ArrayType if order.direction == Ascending =>
+            a.interpretedOrdering.asInstanceOf[Ordering[Any]].compare(left, right)
+          case a: ArrayType if order.direction == Descending =>
+            a.interpretedOrdering.asInstanceOf[Ordering[Any]].reverse.compare(left, right)
           case s: StructType if order.direction == Ascending =>
             s.interpretedOrdering.asInstanceOf[Ordering[Any]].compare(left, right)
           case s: StructType if order.direction == Descending =>
@@ -86,6 +90,8 @@ object RowOrdering {
     case NullType => true
     case dt: AtomicType => true
     case struct: StructType => struct.fields.forall(f => isOrderable(f.dataType))
+    case array: ArrayType => isOrderable(array.elementType)
+    case udt: UserDefinedType[_] => isOrderable(udt.sqlType)
     case _ => false
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/TypeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/TypeUtils.scala
index bcf4d78fb937..f603cbfb0cc2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/TypeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/TypeUtils.scala
@@ -57,6 +57,7 @@ object TypeUtils {
   def getInterpretedOrdering(t: DataType): Ordering[Any] = {
     t match {
       case i: AtomicType => i.ordering.asInstanceOf[Ordering[Any]]
+      case a: ArrayType => a.interpretedOrdering.asInstanceOf[Ordering[Any]]
       case s: StructType => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/AbstractDataType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/AbstractDataType.scala
index 1d2d007c2b4d..a5ae8bb0e5eb 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/AbstractDataType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/AbstractDataType.scala
@@ -84,6 +84,7 @@ private[sql] object TypeCollection {
    * Types that can be ordered/compared. In the long run we should probably make this a trait
    * that can be mixed into each data type, and perhaps create an [[AbstractDataType]].
    */
+  // TODO: Should we consolidate this with RowOrdering.isOrderable?
   val Ordered = TypeCollection(
     BooleanType,
     ByteType, ShortType, IntegerType, LongType,
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala
index 5770f59b5307..a001eadcc61d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/ArrayType.scala
@@ -17,10 +17,13 @@
 
 package org.apache.spark.sql.types
 
+import org.apache.spark.sql.catalyst.util.ArrayData
 import org.json4s.JsonDSL._
 
 import org.apache.spark.annotation.DeveloperApi
 
+import scala.math.Ordering
+
 
 object ArrayType extends AbstractDataType {
   /** Construct a [[ArrayType]] object with the given element type. The `containsNull` is true. */
@@ -81,4 +84,49 @@ case class ArrayType(elementType: DataType, containsNull: Boolean) extends DataT
   override private[spark] def existsRecursively(f: (DataType) => Boolean): Boolean = {
     f(this) || elementType.existsRecursively(f)
   }
+
+  @transient
+  private[sql] lazy val interpretedOrdering: Ordering[ArrayData] = new Ordering[ArrayData] {
+    private[this] val elementOrdering: Ordering[Any] = elementType match {
+      case dt: AtomicType => dt.ordering.asInstanceOf[Ordering[Any]]
+      case a : ArrayType => a.interpretedOrdering.asInstanceOf[Ordering[Any]]
+      case s: StructType => s.interpretedOrdering.asInstanceOf[Ordering[Any]]
+      case other =>
+        throw new IllegalArgumentException(s"Type $other does not support ordered operations")
+    }
+
+    def compare(x: ArrayData, y: ArrayData): Int = {
+      val leftArray = x
+      val rightArray = y
+      val minLength = scala.math.min(leftArray.numElements(), rightArray.numElements())
+      var i = 0
+      while (i < minLength) {
+        val isNullLeft = leftArray.isNullAt(i)
+        val isNullRight = rightArray.isNullAt(i)
+        if (isNullLeft && isNullRight) {
+          // Do nothing.
+        } else if (isNullLeft) {
+          return -1
+        } else if (isNullRight) {
+          return 1
+        } else {
+          val comp =
+            elementOrdering.compare(
+              leftArray.get(i, elementType),
+              rightArray.get(i, elementType))
+          if (comp != 0) {
+            return comp
+          }
+        }
+        i += 1
+      }
+      if (leftArray.numElements() < rightArray.numElements()) {
+        return -1
+      } else if (leftArray.numElements() > rightArray.numElements()) {
+        return 1
+      } else {
+        return 0
+      }
+    }
+  }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
index 2e7c3bd67b55..ee435578743f 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisErrorSuite.scala
@@ -23,7 +23,7 @@ import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.Inner
 import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.dsl.plans._
-import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
+import org.apache.spark.sql.catalyst.util.{MapData, ArrayBasedMapData, GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 
 import scala.beans.{BeanProperty, BeanInfo}
@@ -53,21 +53,29 @@ private[sql] class GroupableUDT extends UserDefinedType[GroupableData] {
 }
 
 @BeanInfo
-private[sql] case class UngroupableData(@BeanProperty data: Array[Int])
+private[sql] case class UngroupableData(@BeanProperty data: Map[Int, Int])
 
 private[sql] class UngroupableUDT extends UserDefinedType[UngroupableData] {
 
-  override def sqlType: DataType = ArrayType(IntegerType)
+  override def sqlType: DataType = MapType(IntegerType, IntegerType)
 
-  override def serialize(obj: Any): ArrayData = {
+  override def serialize(obj: Any): MapData = {
     obj match {
-      case groupableData: UngroupableData => new GenericArrayData(groupableData.data)
+      case groupableData: UngroupableData =>
+        val keyArray = new GenericArrayData(groupableData.data.keys.toSeq)
+        val valueArray = new GenericArrayData(groupableData.data.values.toSeq)
+        new ArrayBasedMapData(keyArray, valueArray)
     }
   }
 
   override def deserialize(datum: Any): UngroupableData = {
     datum match {
-      case data: Array[Int] => UngroupableData(data)
+      case data: MapData =>
+        val keyArray = data.keyArray().array
+        val valueArray = data.valueArray().array
+        assert(keyArray.length == valueArray.length)
+        val mapData = keyArray.zip(valueArray).toMap.asInstanceOf[Map[Int, Int]]
+        UngroupableData(mapData)
     }
   }
 
@@ -154,8 +162,8 @@ class AnalysisErrorSuite extends AnalysisTest {
 
   errorTest(
     "sorting by unsupported column types",
-    listRelation.orderBy('list.asc),
-    "sort" :: "type" :: "array<int>" :: Nil)
+    mapRelation.orderBy('map.asc),
+    "sort" :: "type" :: "map<int,int>" :: Nil)
 
   errorTest(
     "non-boolean filters",
@@ -259,32 +267,33 @@ class AnalysisErrorSuite extends AnalysisTest {
         case true =>
           assertAnalysisSuccess(plan, true)
         case false =>
-          assertAnalysisError(plan, "expression a cannot be used in grouping expression" :: Nil)
+          assertAnalysisError(plan, "expression a cannot be used as a grouping expression" :: Nil)
       }
-
     }
 
     val supportedDataTypes = Seq(
-      StringType,
+      StringType, BinaryType,
       NullType, BooleanType,
       ByteType, ShortType, IntegerType, LongType,
       FloatType, DoubleType, DecimalType(25, 5), DecimalType(6, 5),
       DateType, TimestampType,
+      ArrayType(IntegerType),
       new StructType()
         .add("f1", FloatType, nullable = true)
         .add("f2", StringType, nullable = true),
+      new StructType()
+        .add("f1", FloatType, nullable = true)
+        .add("f2", ArrayType(BooleanType, containsNull = true), nullable = true),
       new GroupableUDT())
     supportedDataTypes.foreach { dataType =>
       checkDataType(dataType, shouldSuccess = true)
     }
 
     val unsupportedDataTypes = Seq(
-      BinaryType,
-      ArrayType(IntegerType),
       MapType(StringType, LongType),
       new StructType()
         .add("f1", FloatType, nullable = true)
-        .add("f2", ArrayType(BooleanType, containsNull = true), nullable = true),
+        .add("f2", MapType(StringType, LongType), nullable = true),
       new UngroupableUDT())
     unsupportedDataTypes.foreach { dataType =>
       checkDataType(dataType, shouldSuccess = false)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
index b902982add8f..ba1866efc84e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/ExpressionTypeCheckingSuite.scala
@@ -24,7 +24,7 @@ import org.apache.spark.sql.catalyst.dsl.plans._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
-import org.apache.spark.sql.types.{TypeCollection, StringType}
+import org.apache.spark.sql.types.{LongType, TypeCollection, StringType}
 
 class ExpressionTypeCheckingSuite extends SparkFunSuite {
 
@@ -32,7 +32,8 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
     'intField.int,
     'stringField.string,
     'booleanField.boolean,
-    'complexField.array(StringType))
+    'arrayField.array(StringType),
+    'mapField.map(StringType, LongType))
 
   def assertError(expr: Expression, errorMessage: String): Unit = {
     val e = intercept[AnalysisException] {
@@ -90,9 +91,9 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
     assertError(BitwiseOr('booleanField, 'booleanField), "requires integral type")
     assertError(BitwiseXor('booleanField, 'booleanField), "requires integral type")
 
-    assertError(MaxOf('complexField, 'complexField),
+    assertError(MaxOf('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
-    assertError(MinOf('complexField, 'complexField),
+    assertError(MinOf('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
   }
 
@@ -109,20 +110,20 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
     assertSuccess(EqualTo('intField, 'booleanField))
     assertSuccess(EqualNullSafe('intField, 'booleanField))
 
-    assertErrorForDifferingTypes(EqualTo('intField, 'complexField))
-    assertErrorForDifferingTypes(EqualNullSafe('intField, 'complexField))
+    assertErrorForDifferingTypes(EqualTo('intField, 'mapField))
+    assertErrorForDifferingTypes(EqualNullSafe('intField, 'mapField))
     assertErrorForDifferingTypes(LessThan('intField, 'booleanField))
     assertErrorForDifferingTypes(LessThanOrEqual('intField, 'booleanField))
     assertErrorForDifferingTypes(GreaterThan('intField, 'booleanField))
     assertErrorForDifferingTypes(GreaterThanOrEqual('intField, 'booleanField))
 
-    assertError(LessThan('complexField, 'complexField),
+    assertError(LessThan('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
-    assertError(LessThanOrEqual('complexField, 'complexField),
+    assertError(LessThanOrEqual('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
-    assertError(GreaterThan('complexField, 'complexField),
+    assertError(GreaterThan('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
-    assertError(GreaterThanOrEqual('complexField, 'complexField),
+    assertError(GreaterThanOrEqual('mapField, 'mapField),
       s"requires ${TypeCollection.Ordered.simpleString} type")
 
     assertError(If('intField, 'stringField, 'stringField),
@@ -130,10 +131,10 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
     assertErrorForDifferingTypes(If('booleanField, 'intField, 'booleanField))
 
     assertError(
-      CaseWhen(Seq('booleanField, 'intField, 'booleanField, 'complexField)),
+      CaseWhen(Seq('booleanField, 'intField, 'booleanField, 'mapField)),
       "THEN and ELSE expressions should all be same type or coercible to a common type")
     assertError(
-      CaseKeyWhen('intField, Seq('intField, 'stringField, 'intField, 'complexField)),
+      CaseKeyWhen('intField, Seq('intField, 'stringField, 'intField, 'mapField)),
       "THEN and ELSE expressions should all be same type or coercible to a common type")
     assertError(
       CaseWhen(Seq('booleanField, 'intField, 'intField, 'intField)),
@@ -147,9 +148,10 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
     // We will cast String to Double for sum and average
     assertSuccess(Sum('stringField))
     assertSuccess(Average('stringField))
+    assertSuccess(Min('arrayField))
 
-    assertError(Min('complexField), "min does not support ordering on type")
-    assertError(Max('complexField), "max does not support ordering on type")
+    assertError(Min('mapField), "min does not support ordering on type")
+    assertError(Max('mapField), "max does not support ordering on type")
     assertError(Sum('booleanField), "function sum requires numeric type")
     assertError(Average('booleanField), "function average requires numeric type")
   }
@@ -184,7 +186,7 @@ class ExpressionTypeCheckingSuite extends SparkFunSuite {
 
     assertError(Round('intField, 'intField), "Only foldable Expression is allowed")
     assertError(Round('intField, 'booleanField), "requires int type")
-    assertError(Round('intField, 'complexField), "requires int type")
+    assertError(Round('intField, 'mapField), "requires int type")
     assertError(Round('booleanField, 'intField), "requires numeric type")
   }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TestRelations.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TestRelations.scala
index 05b870705e7e..bc07b609a341 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TestRelations.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TestRelations.scala
@@ -48,4 +48,7 @@ object TestRelations {
 
   val listRelation = LocalRelation(
     AttributeReference("list", ArrayType(IntegerType))())
+
+  val mapRelation = LocalRelation(
+    AttributeReference("map", MapType(IntegerType, IntegerType))())
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CodeGenerationSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CodeGenerationSuite.scala
index e323467af5f4..002ed16dcfe7 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CodeGenerationSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CodeGenerationSuite.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
-import scala.math._
-
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.{Row, RandomDataGenerator}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
@@ -49,40 +47,6 @@ class CodeGenerationSuite extends SparkFunSuite with ExpressionEvalHelper {
     futures.foreach(Await.result(_, 10.seconds))
   }
 
-  // Test GenerateOrdering for all common types. For each type, we construct random input rows that
-  // contain two columns of that type, then for pairs of randomly-generated rows we check that
-  // GenerateOrdering agrees with RowOrdering.
-  (DataTypeTestUtils.atomicTypes ++ Set(NullType)).foreach { dataType =>
-    test(s"GenerateOrdering with $dataType") {
-      val rowOrdering = InterpretedOrdering.forSchema(Seq(dataType, dataType))
-      val genOrdering = GenerateOrdering.generate(
-        BoundReference(0, dataType, nullable = true).asc ::
-          BoundReference(1, dataType, nullable = true).asc :: Nil)
-      val rowType = StructType(
-        StructField("a", dataType, nullable = true) ::
-          StructField("b", dataType, nullable = true) :: Nil)
-      val maybeDataGenerator = RandomDataGenerator.forType(rowType, nullable = false)
-      assume(maybeDataGenerator.isDefined)
-      val randGenerator = maybeDataGenerator.get
-      val toCatalyst = CatalystTypeConverters.createToCatalystConverter(rowType)
-      for (_ <- 1 to 50) {
-        val a = toCatalyst(randGenerator()).asInstanceOf[InternalRow]
-        val b = toCatalyst(randGenerator()).asInstanceOf[InternalRow]
-        withClue(s"a = $a, b = $b") {
-          assert(genOrdering.compare(a, a) === 0)
-          assert(genOrdering.compare(b, b) === 0)
-          assert(rowOrdering.compare(a, a) === 0)
-          assert(rowOrdering.compare(b, b) === 0)
-          assert(signum(genOrdering.compare(a, b)) === -1 * signum(genOrdering.compare(b, a)))
-          assert(signum(rowOrdering.compare(a, b)) === -1 * signum(rowOrdering.compare(b, a)))
-          assert(
-            signum(rowOrdering.compare(a, b)) === signum(genOrdering.compare(a, b)),
-            "Generated and non-generated orderings should agree")
-        }
-      }
-    }
-  }
-
   test("SPARK-8443: split wide projections into blocks due to JVM code size limit") {
     val length = 5000
     val expressions = List.fill(length)(EqualTo(Literal(1), Literal(1)))
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/OrderingSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/OrderingSuite.scala
new file mode 100644
index 000000000000..7ad8657bde12
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/OrderingSuite.scala
@@ -0,0 +1,124 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.expressions
+
+import scala.math._
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.{Row, RandomDataGenerator}
+import org.apache.spark.sql.catalyst.{InternalRow, CatalystTypeConverters}
+import org.apache.spark.sql.catalyst.dsl.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen.GenerateOrdering
+import org.apache.spark.sql.types._
+
+class OrderingSuite extends SparkFunSuite with ExpressionEvalHelper {
+
+  def compareArrays(a: Seq[Any], b: Seq[Any], expected: Int): Unit = {
+    test(s"compare two arrays: a = $a, b = $b") {
+      val dataType = ArrayType(IntegerType)
+      val rowType = StructType(StructField("array", dataType, nullable = true) :: Nil)
+      val toCatalyst = CatalystTypeConverters.createToCatalystConverter(rowType)
+      val rowA = toCatalyst(Row(a)).asInstanceOf[InternalRow]
+      val rowB = toCatalyst(Row(b)).asInstanceOf[InternalRow]
+      Seq(Ascending, Descending).foreach { direction =>
+        val sortOrder = direction match {
+          case Ascending => BoundReference(0, dataType, nullable = true).asc
+          case Descending => BoundReference(0, dataType, nullable = true).desc
+        }
+        val expectedCompareResult = direction match {
+          case Ascending => signum(expected)
+          case Descending => -1 * signum(expected)
+        }
+        val intOrdering = new InterpretedOrdering(sortOrder :: Nil)
+        val genOrdering = GenerateOrdering.generate(sortOrder :: Nil)
+        Seq(intOrdering, genOrdering).foreach { ordering =>
+          assert(ordering.compare(rowA, rowA) === 0)
+          assert(ordering.compare(rowB, rowB) === 0)
+          assert(signum(ordering.compare(rowA, rowB)) === expectedCompareResult)
+          assert(signum(ordering.compare(rowB, rowA)) === -1 * expectedCompareResult)
+        }
+      }
+    }
+  }
+
+  // Two arrays have the same size.
+  compareArrays(Seq[Any](), Seq[Any](), 0)
+  compareArrays(Seq[Any](1), Seq[Any](1), 0)
+  compareArrays(Seq[Any](1, 2), Seq[Any](1, 2), 0)
+  compareArrays(Seq[Any](1, 2, 2), Seq[Any](1, 2, 3), -1)
+
+  // Two arrays have different sizes.
+  compareArrays(Seq[Any](), Seq[Any](1), -1)
+  compareArrays(Seq[Any](1, 2, 3), Seq[Any](1, 2, 3, 4), -1)
+  compareArrays(Seq[Any](1, 2, 3), Seq[Any](1, 2, 3, 2), -1)
+  compareArrays(Seq[Any](1, 2, 3), Seq[Any](1, 2, 2, 2), 1)
+
+  // Arrays having nulls.
+  compareArrays(Seq[Any](1, 2, 3), Seq[Any](1, 2, 3, null), -1)
+  compareArrays(Seq[Any](), Seq[Any](null), -1)
+  compareArrays(Seq[Any](null), Seq[Any](null), 0)
+  compareArrays(Seq[Any](null, null), Seq[Any](null, null), 0)
+  compareArrays(Seq[Any](null), Seq[Any](null, null), -1)
+  compareArrays(Seq[Any](null), Seq[Any](1), -1)
+  compareArrays(Seq[Any](null), Seq[Any](null, 1), -1)
+  compareArrays(Seq[Any](null, 1), Seq[Any](1, 1), -1)
+  compareArrays(Seq[Any](1, null, 1), Seq[Any](1, null, 1), 0)
+  compareArrays(Seq[Any](1, null, 1), Seq[Any](1, null, 2), -1)
+
+  // Test GenerateOrdering for all common types. For each type, we construct random input rows that
+  // contain two columns of that type, then for pairs of randomly-generated rows we check that
+  // GenerateOrdering agrees with RowOrdering.
+  {
+    val structType =
+      new StructType()
+        .add("f1", FloatType, nullable = true)
+        .add("f2", ArrayType(BooleanType, containsNull = true), nullable = true)
+    val arrayOfStructType = ArrayType(structType)
+    val complexTypes = ArrayType(IntegerType) :: structType :: arrayOfStructType :: Nil
+    (DataTypeTestUtils.atomicTypes ++ complexTypes ++ Set(NullType)).foreach { dataType =>
+      test(s"GenerateOrdering with $dataType") {
+        val rowOrdering = InterpretedOrdering.forSchema(Seq(dataType, dataType))
+        val genOrdering = GenerateOrdering.generate(
+          BoundReference(0, dataType, nullable = true).asc ::
+            BoundReference(1, dataType, nullable = true).asc :: Nil)
+        val rowType = StructType(
+          StructField("a", dataType, nullable = true) ::
+            StructField("b", dataType, nullable = true) :: Nil)
+        val maybeDataGenerator = RandomDataGenerator.forType(rowType, nullable = false)
+        assume(maybeDataGenerator.isDefined)
+        val randGenerator = maybeDataGenerator.get
+        val toCatalyst = CatalystTypeConverters.createToCatalystConverter(rowType)
+        for (_ <- 1 to 50) {
+          val a = toCatalyst(randGenerator()).asInstanceOf[InternalRow]
+          val b = toCatalyst(randGenerator()).asInstanceOf[InternalRow]
+          withClue(s"a = $a, b = $b") {
+            assert(genOrdering.compare(a, a) === 0)
+            assert(genOrdering.compare(b, b) === 0)
+            assert(rowOrdering.compare(a, a) === 0)
+            assert(rowOrdering.compare(b, b) === 0)
+            assert(signum(genOrdering.compare(a, b)) === -1 * signum(genOrdering.compare(b, a)))
+            assert(signum(rowOrdering.compare(a, b)) === -1 * signum(rowOrdering.compare(b, a)))
+            assert(
+              signum(rowOrdering.compare(a, b)) === signum(genOrdering.compare(a, b)),
+              "Generated and non-generated orderings should agree")
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
index 3a3f19af1473..aff9efe4b2b1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
@@ -308,10 +308,14 @@ class DataFrameFunctionsSuite extends QueryTest with SharedSQLContext {
         Row(null, null))
     )
 
-    val df2 = Seq((Array[Array[Int]](Array(2)), "x")).toDF("a", "b")
-    assert(intercept[AnalysisException] {
-      df2.selectExpr("sort_array(a)").collect()
-    }.getMessage().contains("does not support sorting array of type array<int>"))
+    val df2 = Seq((Array[Array[Int]](Array(2), Array(1), Array(2, 4), null), "x")).toDF("a", "b")
+    checkAnswer(
+      df2.selectExpr("sort_array(a, true)", "sort_array(a, false)"),
+      Seq(
+        Row(
+          Seq[Seq[Int]](null, Seq(1), Seq(2), Seq(2, 4)),
+          Seq[Seq[Int]](Seq(2, 4), Seq(2), Seq(1), null)))
+    )
 
     val df3 = Seq(("xxx", "x")).toDF("a", "b")
     assert(intercept[AnalysisException] {
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 61e3e913c23e..6dde79f74d3d 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -132,6 +132,22 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
       (3, null, null)).toDF("key", "value1", "value2")
     data2.write.saveAsTable("agg2")
 
+    val data3 = Seq[(Seq[Integer], Integer, Integer)](
+      (Seq[Integer](1, 1), 10, -10),
+      (Seq[Integer](null), -60, 60),
+      (Seq[Integer](1, 1), 30, -30),
+      (Seq[Integer](1), 30, 30),
+      (Seq[Integer](2), 1, 1),
+      (null, -10, 10),
+      (Seq[Integer](2, 3), -1, null),
+      (Seq[Integer](2, 3), 1, 1),
+      (Seq[Integer](2, 3, 4), null, 1),
+      (Seq[Integer](null), 100, -10),
+      (Seq[Integer](3), null, 3),
+      (null, null, null),
+      (Seq[Integer](3), null, null)).toDF("key", "value1", "value2")
+    data3.write.saveAsTable("agg3")
+
     val emptyDF = sqlContext.createDataFrame(
       sparkContext.emptyRDD[Row],
       StructType(StructField("key", StringType) :: StructField("value", IntegerType) :: Nil))
@@ -146,6 +162,7 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
   override def afterAll(): Unit = {
     sqlContext.sql("DROP TABLE IF EXISTS agg1")
     sqlContext.sql("DROP TABLE IF EXISTS agg2")
+    sqlContext.sql("DROP TABLE IF EXISTS agg3")
     sqlContext.dropTempTable("emptyTable")
   }
 
@@ -266,6 +283,41 @@ abstract class AggregationQuerySuite extends QueryTest with SQLTestUtils with Te
         Row(100, null) ::
         Row(null, 3) ::
         Row(null, null) :: Nil)
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT DISTINCT key
+          |FROM agg3
+        """.stripMargin),
+      Row(Seq[Integer](1, 1)) ::
+        Row(Seq[Integer](null)) ::
+        Row(Seq[Integer](1)) ::
+        Row(Seq[Integer](2)) ::
+        Row(null) ::
+        Row(Seq[Integer](2, 3)) ::
+        Row(Seq[Integer](2, 3, 4)) ::
+        Row(Seq[Integer](3)) :: Nil)
+
+    checkAnswer(
+      sqlContext.sql(
+        """
+          |SELECT value1, key
+          |FROM agg3
+          |GROUP BY value1, key
+        """.stripMargin),
+      Row(10, Seq[Integer](1, 1)) ::
+        Row(-60, Seq[Integer](null)) ::
+        Row(30, Seq[Integer](1, 1)) ::
+        Row(30, Seq[Integer](1)) ::
+        Row(1, Seq[Integer](2)) ::
+        Row(-10, null) ::
+        Row(-1, Seq[Integer](2, 3)) ::
+        Row(1, Seq[Integer](2, 3)) ::
+        Row(null, Seq[Integer](2, 3, 4)) ::
+        Row(100, Seq[Integer](null)) ::
+        Row(null, Seq[Integer](3)) ::
+        Row(null, null) :: Nil)
   }
 
   test("case in-sensitive resolution") {

From 72c1d68b4ab6acb3f85971e10947caabb4bd846d Mon Sep 17 00:00:00 2001
From: Yu Gao <ygao@us.ibm.com>
Date: Sun, 15 Nov 2015 14:53:59 -0800
Subject: [PATCH 688/896] [SPARK-10181][SQL] Do kerberos login for credentials
 during hive client initialization

On driver process start up, UserGroupInformation.loginUserFromKeytab is called with the principal and keytab passed in, and therefore static var UserGroupInfomation,loginUser is set to that principal with kerberos credentials saved in its private credential set, and all threads within the driver process are supposed to see and use this login credentials to authenticate with Hive and Hadoop. However, because of IsolatedClientLoader, UserGroupInformation class is not shared for hive metastore clients, and instead it is loaded separately and of course not able to see the prepared kerberos login credentials in the main thread.

The first proposed fix would cause other classloader conflict errors, and is not an appropriate solution. This new change does kerberos login during hive client initialization, which will make credentials ready for the particular hive client instance.

 yhuai Please take a look and let me know. If you are not the right person to talk to, could you point me to someone responsible for this?

Author: Yu Gao <ygao@us.ibm.com>
Author: gaoyu <gaoyu@gaoyu-macbookpro.roam.corp.google.com>
Author: Yu Gao <crystalgaoyu@gmail.com>

Closes #9272 from yolandagao/master.
---
 .../org/apache/spark/deploy/SparkSubmit.scala | 17 ++++++++++---
 .../spark/sql/hive/client/ClientWrapper.scala | 24 ++++++++++++++++++-
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index 84ae122f4437..09d2ec90c933 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -39,7 +39,7 @@ import org.apache.ivy.plugins.matcher.GlobPatternMatcher
 import org.apache.ivy.plugins.repository.file.FileRepository
 import org.apache.ivy.plugins.resolver.{FileSystemResolver, ChainResolver, IBiblioResolver}
 
-import org.apache.spark.{SparkUserAppException, SPARK_VERSION}
+import org.apache.spark.{SparkException, SparkUserAppException, SPARK_VERSION}
 import org.apache.spark.api.r.RUtils
 import org.apache.spark.deploy.rest._
 import org.apache.spark.util.{ChildFirstURLClassLoader, MutableURLClassLoader, Utils}
@@ -521,8 +521,19 @@ object SparkSubmit {
         sysProps.put("spark.yarn.isPython", "true")
       }
       if (args.principal != null) {
-        require(args.keytab != null, "Keytab must be specified when the keytab is specified")
-        UserGroupInformation.loginUserFromKeytab(args.principal, args.keytab)
+        require(args.keytab != null, "Keytab must be specified when principal is specified")
+        if (!new File(args.keytab).exists()) {
+          throw new SparkException(s"Keytab file: ${args.keytab} does not exist")
+        } else {
+          // Add keytab and principal configurations in sysProps to make them available
+          // for later use; e.g. in spark sql, the isolated class loader used to talk
+          // to HiveMetastore will use these settings. They will be set as Java system
+          // properties and then loaded by SparkConf
+          sysProps.put("spark.yarn.keytab", args.keytab)
+          sysProps.put("spark.yarn.principal", args.principal)
+
+          UserGroupInformation.loginUserFromKeytab(args.principal, args.keytab)
+        }
       }
     }
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
index f1c2489b3827..598ccdeee4ad 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/ClientWrapper.scala
@@ -32,9 +32,10 @@ import org.apache.hadoop.hive.ql.processors._
 import org.apache.hadoop.hive.ql.session.SessionState
 import org.apache.hadoop.hive.ql.{Driver, metadata}
 import org.apache.hadoop.hive.shims.{HadoopShims, ShimLoader}
+import org.apache.hadoop.security.UserGroupInformation
 import org.apache.hadoop.util.VersionInfo
 
-import org.apache.spark.Logging
+import org.apache.spark.{SparkConf, SparkException, Logging}
 import org.apache.spark.sql.catalyst.expressions.Expression
 import org.apache.spark.sql.execution.QueryExecutionException
 import org.apache.spark.util.{CircularBuffer, Utils}
@@ -149,6 +150,27 @@ private[hive] class ClientWrapper(
     val original = Thread.currentThread().getContextClassLoader
     // Switch to the initClassLoader.
     Thread.currentThread().setContextClassLoader(initClassLoader)
+
+    // Set up kerberos credentials for UserGroupInformation.loginUser within
+    // current class loader
+    // Instead of using the spark conf of the current spark context, a new
+    // instance of SparkConf is needed for the original value of spark.yarn.keytab
+    // and spark.yarn.principal set in SparkSubmit, as yarn.Client resets the
+    // keytab configuration for the link name in distributed cache
+    val sparkConf = new SparkConf
+    if (sparkConf.contains("spark.yarn.principal") && sparkConf.contains("spark.yarn.keytab")) {
+      val principalName = sparkConf.get("spark.yarn.principal")
+      val keytabFileName = sparkConf.get("spark.yarn.keytab")
+      if (!new File(keytabFileName).exists()) {
+        throw new SparkException(s"Keytab file: ${keytabFileName}" +
+          " specified in spark.yarn.keytab does not exist")
+      } else {
+        logInfo("Attempting to login to Kerberos" +
+          s" using principal: ${principalName} and keytab: ${keytabFileName}")
+        UserGroupInformation.loginUserFromKeytab(principalName, keytabFileName)
+      }
+    }
+
     val ret = try {
       val initialConf = new HiveConf(classOf[SessionState])
       // HiveConf is a Hadoop Configuration, which has a field of classLoader and

From d7d9fa0b8750166f8b74f9bc321df26908683a8b Mon Sep 17 00:00:00 2001
From: zero323 <matthew.szymkiewicz@gmail.com>
Date: Sun, 15 Nov 2015 19:15:27 -0800
Subject: [PATCH 689/896] [SPARK-11086][SPARKR] Use dropFactors column-wise
 instead of nested loop when createDataFrame

Use `dropFactors` column-wise instead of nested loop when `createDataFrame` from a `data.frame`

At this moment SparkR createDataFrame is using nested loop to convert factors to character when called on a local data.frame.  It works but is incredibly slow especially with data.table (~ 2 orders of magnitude compared to PySpark / Pandas version on a DateFrame of size 1M rows x 2 columns).

A simple improvement is to apply `dropFactor `column-wise and then reshape output list.

It should at least partially address [SPARK-8277](https://issues.apache.org/jira/browse/SPARK-8277).

Author: zero323 <matthew.szymkiewicz@gmail.com>

Closes #9099 from zero323/SPARK-11086.
---
 R/pkg/R/SQLContext.R             | 54 +++++++++++++++++++-------------
 R/pkg/inst/tests/test_sparkSQL.R | 16 ++++++++++
 2 files changed, 49 insertions(+), 21 deletions(-)

diff --git a/R/pkg/R/SQLContext.R b/R/pkg/R/SQLContext.R
index fd013fdb304d..a62b25fde926 100644
--- a/R/pkg/R/SQLContext.R
+++ b/R/pkg/R/SQLContext.R
@@ -17,27 +17,33 @@
 
 # SQLcontext.R: SQLContext-driven functions
 
+
+# Map top level R type to SQL type
+getInternalType <- function(x) {
+  # class of POSIXlt is c("POSIXlt" "POSIXt")
+  switch(class(x)[[1]],
+         integer = "integer",
+         character = "string",
+         logical = "boolean",
+         double = "double",
+         numeric = "double",
+         raw = "binary",
+         list = "array",
+         struct = "struct",
+         environment = "map",
+         Date = "date",
+         POSIXlt = "timestamp",
+         POSIXct = "timestamp",
+         stop(paste("Unsupported type for DataFrame:", class(x))))
+}
+
 #' infer the SQL type
 infer_type <- function(x) {
   if (is.null(x)) {
     stop("can not infer type from NULL")
   }
 
-  # class of POSIXlt is c("POSIXlt" "POSIXt")
-  type <- switch(class(x)[[1]],
-                 integer = "integer",
-                 character = "string",
-                 logical = "boolean",
-                 double = "double",
-                 numeric = "double",
-                 raw = "binary",
-                 list = "array",
-                 struct = "struct",
-                 environment = "map",
-                 Date = "date",
-                 POSIXlt = "timestamp",
-                 POSIXct = "timestamp",
-                 stop(paste("Unsupported type for DataFrame:", class(x))))
+  type <- getInternalType(x)
 
   if (type == "map") {
     stopifnot(length(x) > 0)
@@ -90,19 +96,25 @@ createDataFrame <- function(sqlContext, data, schema = NULL, samplingRatio = 1.0
       if (is.null(schema)) {
         schema <- names(data)
       }
-      n <- nrow(data)
-      m <- ncol(data)
+
       # get rid of factor type
-      dropFactor <- function(x) {
+      cleanCols <- function(x) {
         if (is.factor(x)) {
           as.character(x)
         } else {
           x
         }
       }
-      data <- lapply(1:n, function(i) {
-        lapply(1:m, function(j) { dropFactor(data[i,j]) })
-      })
+
+      # drop factors and wrap lists
+      data <- setNames(lapply(data, cleanCols), NULL)
+
+      # check if all columns have supported type
+      lapply(data, getInternalType)
+
+      # convert to rows
+      args <- list(FUN = list, SIMPLIFY = FALSE, USE.NAMES = FALSE)
+      data <- do.call(mapply, append(args, data))
   }
   if (is.list(data)) {
     sc <- callJStatic("org.apache.spark.sql.api.r.SQLUtils", "getJavaSparkContext", sqlContext)
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index af024e6183a3..8ff06276599e 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -242,6 +242,14 @@ test_that("create DataFrame from list or data.frame", {
   expect_equal(count(df), 3)
   ldf2 <- collect(df)
   expect_equal(ldf$a, ldf2$a)
+
+  irisdf <- createDataFrame(sqlContext, iris)
+  iris_collected <- collect(irisdf)
+  expect_equivalent(iris_collected[,-5], iris[,-5])
+  expect_equal(iris_collected$Species, as.character(iris$Species))
+
+  mtcarsdf <- createDataFrame(sqlContext, mtcars)
+  expect_equivalent(collect(mtcarsdf), mtcars)
 })
 
 test_that("create DataFrame with different data types", {
@@ -283,6 +291,14 @@ test_that("create DataFrame with complex types", {
   expect_equal(s$b, 3L)
 })
 
+test_that("create DataFrame from a data.frame with complex types", {
+  ldf <- data.frame(row.names=1:2)
+  ldf$a_list <- list(list(1, 2), list(3, 4))
+  sdf <- createDataFrame(sqlContext, ldf)
+
+  expect_equivalent(ldf, collect(sdf))
+})
+
 # For test map type and struct type in DataFrame
 mockLinesMapType <- c("{\"name\":\"Bob\",\"info\":{\"age\":16,\"height\":176.5}}",
                       "{\"name\":\"Alice\",\"info\":{\"age\":20,\"height\":164.3}}",

From 835a79d78ee879a3c36dde85e5b3591243bf3957 Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Sun, 15 Nov 2015 19:29:09 -0800
Subject: [PATCH 690/896] [SPARK-10500][SPARKR] sparkr.zip cannot be created if
 /R/lib is unwritable

The basic idea is that:
The archive of the SparkR package itself, that is sparkr.zip, is created during build process and is contained in the Spark binary distribution. No change to it after the distribution is installed as the directory it resides ($SPARK_HOME/R/lib) may not be writable.

When there is R source code contained in jars or Spark packages specified with "--jars" or "--packages" command line option, a temporary directory is created by calling Utils.createTempDir() where the R packages built from the R source code will be installed. The temporary directory is writable, and won't interfere with each other when there are multiple SparkR sessions, and will be deleted when this SparkR session ends. The R binary packages installed in the temporary directory then are packed into an archive named rpkg.zip.

sparkr.zip and rpkg.zip are distributed to the cluster in YARN modes.

The distribution of rpkg.zip in Standalone modes is not supported in this PR, and will be address in another PR.

Various R files are updated to accept multiple lib paths (one is for SparkR package, the other is for other R packages)  so that these package can be accessed in R.

Author: Sun Rui <rui.sun@intel.com>

Closes #9390 from sun-rui/SPARK-10500.
---
 R/install-dev.bat                             |  6 +++
 R/install-dev.sh                              |  4 ++
 R/pkg/R/sparkR.R                              | 14 +++++-
 R/pkg/inst/profile/general.R                  |  3 +-
 R/pkg/inst/worker/daemon.R                    |  5 ++-
 R/pkg/inst/worker/worker.R                    |  3 +-
 .../org/apache/spark/api/r/RBackend.scala     |  1 +
 .../scala/org/apache/spark/api/r/RRDD.scala   |  4 +-
 .../scala/org/apache/spark/api/r/RUtils.scala | 37 +++++++++++++---
 .../apache/spark/deploy/RPackageUtils.scala   | 26 ++++++++---
 .../org/apache/spark/deploy/RRunner.scala     |  5 ++-
 .../org/apache/spark/deploy/SparkSubmit.scala | 43 +++++++++++++++----
 .../spark/deploy/SparkSubmitSuite.scala       |  5 +--
 make-distribution.sh                          |  1 +
 14 files changed, 121 insertions(+), 36 deletions(-)

diff --git a/R/install-dev.bat b/R/install-dev.bat
index 008a5c668bc4..ed1c91ae3a0f 100644
--- a/R/install-dev.bat
+++ b/R/install-dev.bat
@@ -25,3 +25,9 @@ set SPARK_HOME=%~dp0..
 MKDIR %SPARK_HOME%\R\lib
 
 R.exe CMD INSTALL --library="%SPARK_HOME%\R\lib"  %SPARK_HOME%\R\pkg\
+
+rem Zip the SparkR package so that it can be distributed to worker nodes on YARN
+pushd %SPARK_HOME%\R\lib
+%JAVA_HOME%\bin\jar.exe cfM "%SPARK_HOME%\R\lib\sparkr.zip" SparkR
+popd
+
diff --git a/R/install-dev.sh b/R/install-dev.sh
index 59d98c9c7a64..4972bb921707 100755
--- a/R/install-dev.sh
+++ b/R/install-dev.sh
@@ -42,4 +42,8 @@ Rscript -e ' if("devtools" %in% rownames(installed.packages())) { library(devtoo
 # Install SparkR to $LIB_DIR
 R CMD INSTALL --library=$LIB_DIR $FWDIR/pkg/
 
+# Zip the SparkR package so that it can be distributed to worker nodes on YARN
+cd $LIB_DIR
+jar cfM "$LIB_DIR/sparkr.zip" SparkR
+
 popd > /dev/null
diff --git a/R/pkg/R/sparkR.R b/R/pkg/R/sparkR.R
index ebe2b2b8dc1d..7ff3fa628b9c 100644
--- a/R/pkg/R/sparkR.R
+++ b/R/pkg/R/sparkR.R
@@ -48,6 +48,12 @@ sparkR.stop <- function() {
       }
     }
 
+    # Remove the R package lib path from .libPaths()
+    if (exists(".libPath", envir = env)) {
+      libPath <- get(".libPath", envir = env)
+      .libPaths(.libPaths()[.libPaths() != libPath])
+    }
+
     if (exists(".backendLaunched", envir = env)) {
       callJStatic("SparkRHandler", "stopBackend")
     }
@@ -155,14 +161,20 @@ sparkR.init <- function(
     f <- file(path, open="rb")
     backendPort <- readInt(f)
     monitorPort <- readInt(f)
+    rLibPath <- readString(f)
     close(f)
     file.remove(path)
     if (length(backendPort) == 0 || backendPort == 0 ||
-        length(monitorPort) == 0 || monitorPort == 0) {
+        length(monitorPort) == 0 || monitorPort == 0 ||
+        length(rLibPath) != 1) {
       stop("JVM failed to launch")
     }
     assign(".monitorConn", socketConnection(port = monitorPort), envir = .sparkREnv)
     assign(".backendLaunched", 1, envir = .sparkREnv)
+    if (rLibPath != "") {
+      assign(".libPath", rLibPath, envir = .sparkREnv)
+      .libPaths(c(rLibPath, .libPaths()))
+    }
   }
 
   .sparkREnv$backendPort <- backendPort
diff --git a/R/pkg/inst/profile/general.R b/R/pkg/inst/profile/general.R
index 2a8a8213d084..c55fe9ba7af7 100644
--- a/R/pkg/inst/profile/general.R
+++ b/R/pkg/inst/profile/general.R
@@ -17,6 +17,7 @@
 
 .First <- function() {
   packageDir <- Sys.getenv("SPARKR_PACKAGE_DIR")
-  .libPaths(c(packageDir, .libPaths()))
+  dirs <- strsplit(packageDir, ",")[[1]]
+  .libPaths(c(dirs, .libPaths()))
   Sys.setenv(NOAWT=1)
 }
diff --git a/R/pkg/inst/worker/daemon.R b/R/pkg/inst/worker/daemon.R
index 3584b418a71a..f55beac6c8c0 100644
--- a/R/pkg/inst/worker/daemon.R
+++ b/R/pkg/inst/worker/daemon.R
@@ -18,10 +18,11 @@
 # Worker daemon
 
 rLibDir <- Sys.getenv("SPARKR_RLIBDIR")
-script <- paste(rLibDir, "SparkR/worker/worker.R", sep = "/")
+dirs <- strsplit(rLibDir, ",")[[1]]
+script <- file.path(dirs[[1]], "SparkR", "worker", "worker.R")
 
 # preload SparkR package, speedup worker
-.libPaths(c(rLibDir, .libPaths()))
+.libPaths(c(dirs, .libPaths()))
 suppressPackageStartupMessages(library(SparkR))
 
 port <- as.integer(Sys.getenv("SPARKR_WORKER_PORT"))
diff --git a/R/pkg/inst/worker/worker.R b/R/pkg/inst/worker/worker.R
index 0c3b0d1f4be2..3ae072beca11 100644
--- a/R/pkg/inst/worker/worker.R
+++ b/R/pkg/inst/worker/worker.R
@@ -35,10 +35,11 @@ bootTime <- currentTimeSecs()
 bootElap <- elapsedSecs()
 
 rLibDir <- Sys.getenv("SPARKR_RLIBDIR")
+dirs <- strsplit(rLibDir, ",")[[1]]
 # Set libPaths to include SparkR package as loadNamespace needs this
 # TODO: Figure out if we can avoid this by not loading any objects that require
 # SparkR namespace
-.libPaths(c(rLibDir, .libPaths()))
+.libPaths(c(dirs, .libPaths()))
 suppressPackageStartupMessages(library(SparkR))
 
 port <- as.integer(Sys.getenv("SPARKR_WORKER_PORT"))
diff --git a/core/src/main/scala/org/apache/spark/api/r/RBackend.scala b/core/src/main/scala/org/apache/spark/api/r/RBackend.scala
index b7e72d4d0ed0..8b3be0da2c8c 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RBackend.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RBackend.scala
@@ -113,6 +113,7 @@ private[spark] object RBackend extends Logging {
       val dos = new DataOutputStream(new FileOutputStream(f))
       dos.writeInt(boundPort)
       dos.writeInt(listenPort)
+      SerDe.writeString(dos, RUtils.rPackages.getOrElse(""))
       dos.close()
       f.renameTo(new File(path))
 
diff --git a/core/src/main/scala/org/apache/spark/api/r/RRDD.scala b/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
index 6b418e908cb5..7509b3d3f44b 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RRDD.scala
@@ -400,14 +400,14 @@ private[r] object RRDD {
 
     val rOptions = "--vanilla"
     val rLibDir = RUtils.sparkRPackagePath(isDriver = false)
-    val rExecScript = rLibDir + "/SparkR/worker/" + script
+    val rExecScript = rLibDir(0) + "/SparkR/worker/" + script
     val pb = new ProcessBuilder(Arrays.asList(rCommand, rOptions, rExecScript))
     // Unset the R_TESTS environment variable for workers.
     // This is set by R CMD check as startup.Rs
     // (http://svn.r-project.org/R/trunk/src/library/tools/R/testing.R)
     // and confuses worker script which tries to load a non-existent file
     pb.environment().put("R_TESTS", "")
-    pb.environment().put("SPARKR_RLIBDIR", rLibDir)
+    pb.environment().put("SPARKR_RLIBDIR", rLibDir.mkString(","))
     pb.environment().put("SPARKR_WORKER_PORT", port.toString)
     pb.redirectErrorStream(true)  // redirect stderr into stdout
     val proc = pb.start()
diff --git a/core/src/main/scala/org/apache/spark/api/r/RUtils.scala b/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
index fd5646b5b637..16157414fd12 100644
--- a/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
+++ b/core/src/main/scala/org/apache/spark/api/r/RUtils.scala
@@ -23,6 +23,10 @@ import java.util.Arrays
 import org.apache.spark.{SparkEnv, SparkException}
 
 private[spark] object RUtils {
+  // Local path where R binary packages built from R source code contained in the spark
+  // packages specified with "--packages" or "--jars" command line option reside.
+  var rPackages: Option[String] = None
+
   /**
    * Get the SparkR package path in the local spark distribution.
    */
@@ -34,11 +38,15 @@ private[spark] object RUtils {
   }
 
   /**
-   * Get the SparkR package path in various deployment modes.
+   * Get the list of paths for R packages in various deployment modes, of which the first
+   * path is for the SparkR package itself. The second path is for R packages built as
+   * part of Spark Packages, if any exist. Spark Packages can be provided through the
+   *  "--packages" or "--jars" command line options.
+   *
    * This assumes that Spark properties `spark.master` and `spark.submit.deployMode`
    * and environment variable `SPARK_HOME` are set.
    */
-  def sparkRPackagePath(isDriver: Boolean): String = {
+  def sparkRPackagePath(isDriver: Boolean): Seq[String] = {
     val (master, deployMode) =
       if (isDriver) {
         (sys.props("spark.master"), sys.props("spark.submit.deployMode"))
@@ -51,15 +59,30 @@ private[spark] object RUtils {
     val isYarnClient = master != null && master.contains("yarn") && deployMode == "client"
 
     // In YARN mode, the SparkR package is distributed as an archive symbolically
-    // linked to the "sparkr" file in the current directory. Note that this does not apply
-    // to the driver in client mode because it is run outside of the cluster.
+    // linked to the "sparkr" file in the current directory and additional R packages
+    // are distributed as an archive symbolically linked to the "rpkg" file in the
+    // current directory.
+    //
+    // Note that this does not apply to the driver in client mode because it is run
+    // outside of the cluster.
     if (isYarnCluster || (isYarnClient && !isDriver)) {
-      new File("sparkr").getAbsolutePath
+      val sparkRPkgPath = new File("sparkr").getAbsolutePath
+      val rPkgPath = new File("rpkg")
+      if (rPkgPath.exists()) {
+        Seq(sparkRPkgPath, rPkgPath.getAbsolutePath)
+      } else {
+        Seq(sparkRPkgPath)
+      }
     } else {
       // Otherwise, assume the package is local
       // TODO: support this for Mesos
-      localSparkRPackagePath.getOrElse {
-        throw new SparkException("SPARK_HOME not set. Can't locate SparkR package.")
+      val sparkRPkgPath = localSparkRPackagePath.getOrElse {
+          throw new SparkException("SPARK_HOME not set. Can't locate SparkR package.")
+      }
+      if (!rPackages.isEmpty) {
+        Seq(sparkRPkgPath, rPackages.get)
+      } else {
+        Seq(sparkRPkgPath)
       }
     }
   }
diff --git a/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala b/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
index 7d160b6790ea..d46dc87a92c9 100644
--- a/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/RPackageUtils.scala
@@ -100,20 +100,29 @@ private[deploy] object RPackageUtils extends Logging {
    * Runs the standard R package installation code to build the R package from source.
    * Multiple runs don't cause problems.
    */
-  private def rPackageBuilder(dir: File, printStream: PrintStream, verbose: Boolean): Boolean = {
+  private def rPackageBuilder(
+      dir: File,
+      printStream: PrintStream,
+      verbose: Boolean,
+      libDir: String): Boolean = {
     // this code should be always running on the driver.
-    val pathToSparkR = RUtils.localSparkRPackagePath.getOrElse(
-      throw new SparkException("SPARK_HOME not set. Can't locate SparkR package."))
     val pathToPkg = Seq(dir, "R", "pkg").mkString(File.separator)
-    val installCmd = baseInstallCmd ++ Seq(pathToSparkR, pathToPkg)
+    val installCmd = baseInstallCmd ++ Seq(libDir, pathToPkg)
     if (verbose) {
       print(s"Building R package with the command: $installCmd", printStream)
     }
     try {
       val builder = new ProcessBuilder(installCmd.asJava)
       builder.redirectErrorStream(true)
+
+      // Put the SparkR package directory into R library search paths in case this R package
+      // may depend on SparkR.
       val env = builder.environment()
-      env.clear()
+      val rPackageDir = RUtils.sparkRPackagePath(isDriver = true)
+      env.put("SPARKR_PACKAGE_DIR", rPackageDir.mkString(","))
+      env.put("R_PROFILE_USER",
+        Seq(rPackageDir(0), "SparkR", "profile", "general.R").mkString(File.separator))
+
       val process = builder.start()
       new RedirectThread(process.getInputStream, printStream, "redirect R packaging").start()
       process.waitFor() == 0
@@ -170,8 +179,11 @@ private[deploy] object RPackageUtils extends Logging {
         if (checkManifestForR(jar)) {
           print(s"$file contains R source code. Now installing package.", printStream, Level.INFO)
           val rSource = extractRFolder(jar, printStream, verbose)
+          if (RUtils.rPackages.isEmpty) {
+            RUtils.rPackages = Some(Utils.createTempDir().getAbsolutePath)
+          }
           try {
-            if (!rPackageBuilder(rSource, printStream, verbose)) {
+            if (!rPackageBuilder(rSource, printStream, verbose, RUtils.rPackages.get)) {
               print(s"ERROR: Failed to build R package in $file.", printStream)
               print(RJarDoc, printStream)
             }
@@ -208,7 +220,7 @@ private[deploy] object RPackageUtils extends Logging {
     }
   }
 
-  /** Zips all the libraries found with SparkR in the R/lib directory for distribution with Yarn. */
+  /** Zips all the R libraries built for distribution to the cluster. */
   private[deploy] def zipRLibraries(dir: File, name: String): File = {
     val filesToBundle = listFilesRecursively(dir, Seq(".zip"))
     // create a zip file from scratch, do not append to existing file.
diff --git a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
index ed183cf16a9c..661f7317c674 100644
--- a/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/RRunner.scala
@@ -82,9 +82,10 @@ object RRunner {
         val env = builder.environment()
         env.put("EXISTING_SPARKR_BACKEND_PORT", sparkRBackendPort.toString)
         val rPackageDir = RUtils.sparkRPackagePath(isDriver = true)
-        env.put("SPARKR_PACKAGE_DIR", rPackageDir)
+        // Put the R package directories into an env variable of comma-separated paths
+        env.put("SPARKR_PACKAGE_DIR", rPackageDir.mkString(","))
         env.put("R_PROFILE_USER",
-          Seq(rPackageDir, "SparkR", "profile", "general.R").mkString(File.separator))
+          Seq(rPackageDir(0), "SparkR", "profile", "general.R").mkString(File.separator))
         builder.redirectErrorStream(true) // Ugly but needed for stdout and stderr to synchronize
         val process = builder.start()
 
diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
index 09d2ec90c933..2e912b59afdb 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala
@@ -83,6 +83,7 @@ object SparkSubmit {
   private val PYSPARK_SHELL = "pyspark-shell"
   private val SPARKR_SHELL = "sparkr-shell"
   private val SPARKR_PACKAGE_ARCHIVE = "sparkr.zip"
+  private val R_PACKAGE_ARCHIVE = "rpkg.zip"
 
   private val CLASS_NOT_FOUND_EXIT_STATUS = 101
 
@@ -362,22 +363,46 @@ object SparkSubmit {
       }
     }
 
-    // In YARN mode for an R app, add the SparkR package archive to archives
-    // that can be distributed with the job
+    // In YARN mode for an R app, add the SparkR package archive and the R package
+    // archive containing all of the built R libraries to archives so that they can
+    // be distributed with the job
     if (args.isR && clusterManager == YARN) {
-      val rPackagePath = RUtils.localSparkRPackagePath
-      if (rPackagePath.isEmpty) {
+      val sparkRPackagePath = RUtils.localSparkRPackagePath
+      if (sparkRPackagePath.isEmpty) {
         printErrorAndExit("SPARK_HOME does not exist for R application in YARN mode.")
       }
-      val rPackageFile =
-        RPackageUtils.zipRLibraries(new File(rPackagePath.get), SPARKR_PACKAGE_ARCHIVE)
-      if (!rPackageFile.exists()) {
+      val sparkRPackageFile = new File(sparkRPackagePath.get, SPARKR_PACKAGE_ARCHIVE)
+      if (!sparkRPackageFile.exists()) {
         printErrorAndExit(s"$SPARKR_PACKAGE_ARCHIVE does not exist for R application in YARN mode.")
       }
-      val localURI = Utils.resolveURI(rPackageFile.getAbsolutePath)
+      val sparkRPackageURI = Utils.resolveURI(sparkRPackageFile.getAbsolutePath).toString
 
+      // Distribute the SparkR package.
       // Assigns a symbol link name "sparkr" to the shipped package.
-      args.archives = mergeFileLists(args.archives, localURI.toString + "#sparkr")
+      args.archives = mergeFileLists(args.archives, sparkRPackageURI + "#sparkr")
+
+      // Distribute the R package archive containing all the built R packages.
+      if (!RUtils.rPackages.isEmpty) {
+        val rPackageFile =
+          RPackageUtils.zipRLibraries(new File(RUtils.rPackages.get), R_PACKAGE_ARCHIVE)
+        if (!rPackageFile.exists()) {
+          printErrorAndExit("Failed to zip all the built R packages.")
+        }
+
+        val rPackageURI = Utils.resolveURI(rPackageFile.getAbsolutePath).toString
+        // Assigns a symbol link name "rpkg" to the shipped package.
+        args.archives = mergeFileLists(args.archives, rPackageURI + "#rpkg")
+      }
+    }
+
+    // TODO: Support distributing R packages with standalone cluster
+    if (args.isR && clusterManager == STANDALONE && !RUtils.rPackages.isEmpty) {
+      printErrorAndExit("Distributing R packages with standalone cluster is not supported.")
+    }
+
+    // TODO: Support SparkR with mesos cluster
+    if (args.isR && clusterManager == MESOS) {
+      printErrorAndExit("SparkR is not supported for Mesos cluster.")
     }
 
     // If we're running a R app, set the main class to our specific R runner
diff --git a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
index 66a50512003d..42e748ec6d52 100644
--- a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
@@ -28,6 +28,7 @@ import org.scalatest.concurrent.Timeouts
 import org.scalatest.time.SpanSugar._
 
 import org.apache.spark._
+import org.apache.spark.api.r.RUtils
 import org.apache.spark.deploy.SparkSubmit._
 import org.apache.spark.deploy.SparkSubmitUtils.MavenCoordinate
 import org.apache.spark.util.{ResetSystemProperties, Utils}
@@ -369,9 +370,6 @@ class SparkSubmitSuite
   }
 
   test("correctly builds R packages included in a jar with --packages") {
-    // TODO(SPARK-9603): Building a package to $SPARK_HOME/R/lib is unavailable on Jenkins.
-    // It's hard to write the test in SparkR (because we can't create the repository dynamically)
-    /*
     assume(RUtils.isRInstalled, "R isn't installed on this machine.")
     val main = MavenCoordinate("my.great.lib", "mylib", "0.1")
     val sparkHome = sys.props.getOrElse("spark.test.home", fail("spark.test.home is not set!"))
@@ -389,7 +387,6 @@ class SparkSubmitSuite
         rScriptDir)
       runSparkSubmit(args)
     }
-    */
   }
 
   test("resolves command line argument paths correctly") {
diff --git a/make-distribution.sh b/make-distribution.sh
index e1c2afdbc6d8..d7d27e253f72 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -220,6 +220,7 @@ cp -r "$SPARK_HOME/ec2" "$DISTDIR"
 if [ -d "$SPARK_HOME"/R/lib/SparkR ]; then
   mkdir -p "$DISTDIR"/R/lib
   cp -r "$SPARK_HOME/R/lib/SparkR" "$DISTDIR"/R/lib
+  cp "$SPARK_HOME/R/lib/sparkr.zip" "$DISTDIR"/R/lib
 fi
 
 # Download and copy in tachyon, if requested

From b58765caa6d7e6933050565c5d423c45e7e70ba6 Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Sun, 15 Nov 2015 21:10:46 -0800
Subject: [PATCH 691/896] [SPARK-9928][SQL] Removal of LogicalLocalTable

LogicalLocalTable in ExistingRDD.scala is replaced by localRelation in LocalRelation.scala?

Do you know any reason why we still keep this class?

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9717 from gatorsmile/LogicalLocalTable.
---
 .../spark/sql/execution/ExistingRDD.scala     | 22 -------------------
 1 file changed, 22 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
index 7a466cf6a0a9..8b41d3d3d892 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
@@ -110,25 +110,3 @@ private[sql] object PhysicalRDD {
     PhysicalRDD(output, rdd, relation.toString, relation.isInstanceOf[HadoopFsRelation])
   }
 }
-
-/** Logical plan node for scanning data from a local collection. */
-private[sql]
-case class LogicalLocalTable(output: Seq[Attribute], rows: Seq[InternalRow])(sqlContext: SQLContext)
-   extends LogicalPlan with MultiInstanceRelation {
-
-  override def children: Seq[LogicalPlan] = Nil
-
-  override def newInstance(): this.type =
-    LogicalLocalTable(output.map(_.newInstance()), rows)(sqlContext).asInstanceOf[this.type]
-
-  override def sameResult(plan: LogicalPlan): Boolean = plan match {
-    case LogicalRDD(_, otherRDD) => rows == rows
-    case _ => false
-  }
-
-  @transient override lazy val statistics: Statistics = Statistics(
-    // TODO: Improve the statistics estimation.
-    // This is made small enough so it can be broadcasted.
-    sizeInBytes = sqlContext.conf.autoBroadcastJoinThreshold - 1
-  )
-}

From fd50fa4c3eff42e8adeeabe399ddba0edac930c8 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Sun, 15 Nov 2015 22:38:30 -0800
Subject: [PATCH 692/896] Revert "[SPARK-11572] Exit AsynchronousListenerBus
 thread when stop() is called"

This reverts commit 3e0a6cf1e02a19b37c68d3026415d53bb57a576b.
---
 .../org/apache/spark/util/AsynchronousListenerBus.scala  | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
index b3b54af972cb..c20627b056be 100644
--- a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
+++ b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
@@ -66,12 +66,15 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
           processingEvent = true
         }
         try {
-          if (stopped.get()) {
+          val event = eventQueue.poll
+          if (event == null) {
             // Get out of the while loop and shutdown the daemon thread
+            if (!stopped.get) {
+              throw new IllegalStateException("Polling `null` from eventQueue means" +
+                " the listener bus has been stopped. So `stopped` must be true")
+            }
             return
           }
-          val event = eventQueue.poll
-          assert(event != null, "event queue was empty but the listener bus was not stopped")
           postToAll(event)
         } finally {
           self.synchronized {

From 42de5253f327bd7ee258b0efb5024f3847fa3b51 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Mon, 16 Nov 2015 00:06:14 -0800
Subject: [PATCH 693/896] [SPARK-11745][SQL] Enable more JSON parsing options

This patch adds the following options to the JSON data source, for dealing with non-standard JSON files:
* `allowComments` (default `false`): ignores Java/C++ style comment in JSON records
* `allowUnquotedFieldNames` (default `false`): allows unquoted JSON field names
* `allowSingleQuotes` (default `true`): allows single quotes in addition to double quotes
* `allowNumericLeadingZeros` (default `false`): allows leading zeros in numbers (e.g. 00012)

To avoid passing a lot of options throughout the json package, I introduced a new JSONOptions case class to define all JSON config options.

Also updated documentation to explain these options.

Scala

![screen shot 2015-11-15 at 6 12 12 pm](https://cloud.githubusercontent.com/assets/323388/11172965/e3ace6ec-8bc4-11e5-805e-2d78f80d0ed6.png)

Python

![screen shot 2015-11-15 at 6 11 28 pm](https://cloud.githubusercontent.com/assets/323388/11172964/e23ed6ee-8bc4-11e5-8216-312f5983acd5.png)

Author: Reynold Xin <rxin@databricks.com>

Closes #9724 from rxin/SPARK-11745.
---
 python/pyspark/sql/readwriter.py              |  10 ++
 .../apache/spark/sql/DataFrameReader.scala    |  22 ++--
 .../spark/sql/execution/SparkPlan.scala       |  17 +--
 .../datasources/json/InferSchema.scala        |  34 +++---
 .../datasources/json/JSONOptions.scala        |  64 ++++++++++
 .../datasources/json/JSONRelation.scala       |  20 ++-
 .../datasources/json/JacksonParser.scala      |  82 +++++++------
 .../json/JsonParsingOptionsSuite.scala        | 114 ++++++++++++++++++
 .../datasources/json/JsonSuite.scala          |  29 ++---
 9 files changed, 286 insertions(+), 106 deletions(-)
 create mode 100644 sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
 create mode 100644 sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonParsingOptionsSuite.scala

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index 927f4077424d..7b8ddb9feba3 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -153,6 +153,16 @@ def json(self, path, schema=None):
                      or RDD of Strings storing JSON objects.
         :param schema: an optional :class:`StructType` for the input schema.
 
+        You can set the following JSON-specific options to deal with non-standard JSON files:
+            * ``primitivesAsString`` (default ``false``): infers all primitive values as a string \
+                type
+            * ``allowComments`` (default ``false``): ignores Java/C++ style comment in JSON records
+            * ``allowUnquotedFieldNames`` (default ``false``): allows unquoted JSON field names
+            * ``allowSingleQuotes`` (default ``true``): allows single quotes in addition to double \
+                quotes
+            * ``allowNumericLeadingZeros`` (default ``false``): allows leading zeros in numbers \
+                (e.g. 00012)
+
         >>> df1 = sqlContext.read.json('python/test_support/sql/people.json')
         >>> df1.dtypes
         [('age', 'bigint'), ('name', 'string')]
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index 6a194a443ab1..5872fbded383 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -29,7 +29,7 @@ import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.execution.datasources.jdbc.{JDBCPartition, JDBCPartitioningInfo, JDBCRelation}
-import org.apache.spark.sql.execution.datasources.json.JSONRelation
+import org.apache.spark.sql.execution.datasources.json.{JSONOptions, JSONRelation}
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.types.StructType
@@ -227,6 +227,15 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    * This function goes through the input once to determine the input schema. If you know the
    * schema in advance, use the version that specifies the schema to avoid the extra scan.
    *
+   * You can set the following JSON-specific options to deal with non-standard JSON files:
+   * <li>`primitivesAsString` (default `false`): infers all primitive values as a string type</li>
+   * <li>`allowComments` (default `false`): ignores Java/C++ style comment in JSON records</li>
+   * <li>`allowUnquotedFieldNames` (default `false`): allows unquoted JSON field names</li>
+   * <li>`allowSingleQuotes` (default `true`): allows single quotes in addition to double quotes
+   * </li>
+   * <li>`allowNumericLeadingZeros` (default `false`): allows leading zeros in numbers
+   * (e.g. 00012)</li>
+   *
    * @param path input path
    * @since 1.4.0
    */
@@ -255,16 +264,13 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    * @since 1.4.0
    */
   def json(jsonRDD: RDD[String]): DataFrame = {
-    val samplingRatio = extraOptions.getOrElse("samplingRatio", "1.0").toDouble
-    val primitivesAsString = extraOptions.getOrElse("primitivesAsString", "false").toBoolean
     sqlContext.baseRelationToDataFrame(
       new JSONRelation(
         Some(jsonRDD),
-        samplingRatio,
-        primitivesAsString,
-        userSpecifiedSchema,
-        None,
-        None)(sqlContext)
+        maybeDataSchema = userSpecifiedSchema,
+        maybePartitionSpec = None,
+        userDefinedPartitionColumns = None,
+        parameters = extraOptions.toMap)(sqlContext)
     )
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
index 1b833002f434..534a3bcb8364 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala
@@ -221,22 +221,6 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
 
   private[this] def isTesting: Boolean = sys.props.contains("spark.testing")
 
-  protected def newProjection(
-      expressions: Seq[Expression], inputSchema: Seq[Attribute]): Projection = {
-    log.debug(s"Creating Projection: $expressions, inputSchema: $inputSchema")
-    try {
-      GenerateProjection.generate(expressions, inputSchema)
-    } catch {
-      case e: Exception =>
-        if (isTesting) {
-          throw e
-        } else {
-          log.error("Failed to generate projection, fallback to interpret", e)
-          new InterpretedProjection(expressions, inputSchema)
-        }
-    }
-  }
-
   protected def newMutableProjection(
       expressions: Seq[Expression], inputSchema: Seq[Attribute]): () => MutableProjection = {
     log.debug(s"Creating MutableProj: $expressions, inputSchema: $inputSchema")
@@ -282,6 +266,7 @@ abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with Serializ
         }
     }
   }
+
   /**
    * Creates a row ordering for the given schema, in natural ascending order.
    */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
index b9914c581a65..922fd5b21167 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/InferSchema.scala
@@ -25,33 +25,36 @@ import org.apache.spark.sql.execution.datasources.json.JacksonUtils.nextUntil
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
 
-private[sql] object InferSchema {
+
+private[json] object InferSchema {
+
   /**
    * Infer the type of a collection of json records in three stages:
    *   1. Infer the type of each record
    *   2. Merge types by choosing the lowest type necessary to cover equal keys
    *   3. Replace any remaining null fields with string, the top type
    */
-  def apply(
+  def infer(
       json: RDD[String],
-      samplingRatio: Double = 1.0,
       columnNameOfCorruptRecords: String,
-      primitivesAsString: Boolean = false): StructType = {
-    require(samplingRatio > 0, s"samplingRatio ($samplingRatio) should be greater than 0")
-    val schemaData = if (samplingRatio > 0.99) {
+      configOptions: JSONOptions): StructType = {
+    require(configOptions.samplingRatio > 0,
+      s"samplingRatio (${configOptions.samplingRatio}) should be greater than 0")
+    val schemaData = if (configOptions.samplingRatio > 0.99) {
       json
     } else {
-      json.sample(withReplacement = false, samplingRatio, 1)
+      json.sample(withReplacement = false, configOptions.samplingRatio, 1)
     }
 
     // perform schema inference on each row and merge afterwards
     val rootType = schemaData.mapPartitions { iter =>
       val factory = new JsonFactory()
+      configOptions.setJacksonOptions(factory)
       iter.map { row =>
         try {
           Utils.tryWithResource(factory.createParser(row)) { parser =>
             parser.nextToken()
-            inferField(parser, primitivesAsString)
+            inferField(parser, configOptions)
           }
         } catch {
           case _: JsonParseException =>
@@ -71,14 +74,14 @@ private[sql] object InferSchema {
   /**
    * Infer the type of a json document from the parser's token stream
    */
-  private def inferField(parser: JsonParser, primitivesAsString: Boolean): DataType = {
+  private def inferField(parser: JsonParser, configOptions: JSONOptions): DataType = {
     import com.fasterxml.jackson.core.JsonToken._
     parser.getCurrentToken match {
       case null | VALUE_NULL => NullType
 
       case FIELD_NAME =>
         parser.nextToken()
-        inferField(parser, primitivesAsString)
+        inferField(parser, configOptions)
 
       case VALUE_STRING if parser.getTextLength < 1 =>
         // Zero length strings and nulls have special handling to deal
@@ -95,7 +98,7 @@ private[sql] object InferSchema {
         while (nextUntil(parser, END_OBJECT)) {
           builder += StructField(
             parser.getCurrentName,
-            inferField(parser, primitivesAsString),
+            inferField(parser, configOptions),
             nullable = true)
         }
 
@@ -107,14 +110,15 @@ private[sql] object InferSchema {
         // the type as we pass through all JSON objects.
         var elementType: DataType = NullType
         while (nextUntil(parser, END_ARRAY)) {
-          elementType = compatibleType(elementType, inferField(parser, primitivesAsString))
+          elementType = compatibleType(
+            elementType, inferField(parser, configOptions))
         }
 
         ArrayType(elementType)
 
-      case (VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT) if primitivesAsString => StringType
+      case (VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT) if configOptions.primitivesAsString => StringType
 
-      case (VALUE_TRUE | VALUE_FALSE) if primitivesAsString => StringType
+      case (VALUE_TRUE | VALUE_FALSE) if configOptions.primitivesAsString => StringType
 
       case VALUE_NUMBER_INT | VALUE_NUMBER_FLOAT =>
         import JsonParser.NumberType._
@@ -178,7 +182,7 @@ private[sql] object InferSchema {
   /**
    * Returns the most general data type for two given data types.
    */
-  private[json] def compatibleType(t1: DataType, t2: DataType): DataType = {
+  def compatibleType(t1: DataType, t2: DataType): DataType = {
     HiveTypeCoercion.findTightestCommonTypeOfTwo(t1, t2).getOrElse {
       // t1 or t2 is a StructType, ArrayType, or an unexpected type.
       (t1, t2) match {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
new file mode 100644
index 000000000000..c132ead20e7d
--- /dev/null
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONOptions.scala
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.json
+
+import com.fasterxml.jackson.core.{JsonParser, JsonFactory}
+
+/**
+ * Options for the JSON data source.
+ *
+ * Most of these map directly to Jackson's internal options, specified in [[JsonParser.Feature]].
+ */
+case class JSONOptions(
+    samplingRatio: Double = 1.0,
+    primitivesAsString: Boolean = false,
+    allowComments: Boolean = false,
+    allowUnquotedFieldNames: Boolean = false,
+    allowSingleQuotes: Boolean = true,
+    allowNumericLeadingZeros: Boolean = false,
+    allowNonNumericNumbers: Boolean = false) {
+
+  /** Sets config options on a Jackson [[JsonFactory]]. */
+  def setJacksonOptions(factory: JsonFactory): Unit = {
+    factory.configure(JsonParser.Feature.ALLOW_COMMENTS, allowComments)
+    factory.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, allowUnquotedFieldNames)
+    factory.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, allowSingleQuotes)
+    factory.configure(JsonParser.Feature.ALLOW_NUMERIC_LEADING_ZEROS, allowNumericLeadingZeros)
+    factory.configure(JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS, allowNonNumericNumbers)
+  }
+}
+
+
+object JSONOptions {
+  def createFromConfigMap(parameters: Map[String, String]): JSONOptions = JSONOptions(
+    samplingRatio =
+      parameters.get("samplingRatio").map(_.toDouble).getOrElse(1.0),
+    primitivesAsString =
+      parameters.get("primitivesAsString").map(_.toBoolean).getOrElse(false),
+    allowComments =
+      parameters.get("allowComments").map(_.toBoolean).getOrElse(false),
+    allowUnquotedFieldNames =
+      parameters.get("allowUnquotedFieldNames").map(_.toBoolean).getOrElse(false),
+    allowSingleQuotes =
+      parameters.get("allowSingleQuotes").map(_.toBoolean).getOrElse(true),
+    allowNumericLeadingZeros =
+      parameters.get("allowNumericLeadingZeros").map(_.toBoolean).getOrElse(false),
+    allowNonNumericNumbers =
+      parameters.get("allowNonNumericNumbers").map(_.toBoolean).getOrElse(true)
+  )
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
index dca638b7f67a..3e61ba35bea8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JSONRelation.scala
@@ -52,13 +52,9 @@ class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
       dataSchema: Option[StructType],
       partitionColumns: Option[StructType],
       parameters: Map[String, String]): HadoopFsRelation = {
-    val samplingRatio = parameters.get("samplingRatio").map(_.toDouble).getOrElse(1.0)
-    val primitivesAsString = parameters.get("primitivesAsString").map(_.toBoolean).getOrElse(false)
 
     new JSONRelation(
       inputRDD = None,
-      samplingRatio = samplingRatio,
-      primitivesAsString = primitivesAsString,
       maybeDataSchema = dataSchema,
       maybePartitionSpec = None,
       userDefinedPartitionColumns = partitionColumns,
@@ -69,8 +65,6 @@ class DefaultSource extends HadoopFsRelationProvider with DataSourceRegister {
 
 private[sql] class JSONRelation(
     val inputRDD: Option[RDD[String]],
-    val samplingRatio: Double,
-    val primitivesAsString: Boolean,
     val maybeDataSchema: Option[StructType],
     val maybePartitionSpec: Option[PartitionSpec],
     override val userDefinedPartitionColumns: Option[StructType],
@@ -79,6 +73,8 @@ private[sql] class JSONRelation(
     (@transient val sqlContext: SQLContext)
   extends HadoopFsRelation(maybePartitionSpec, parameters) {
 
+  val options: JSONOptions = JSONOptions.createFromConfigMap(parameters)
+
   /** Constraints to be imposed on schema to be stored. */
   private def checkConstraints(schema: StructType): Unit = {
     if (schema.fieldNames.length != schema.fieldNames.distinct.length) {
@@ -109,17 +105,16 @@ private[sql] class JSONRelation(
       classOf[Text]).map(_._2.toString) // get the text line
   }
 
-  override lazy val dataSchema = {
+  override lazy val dataSchema: StructType = {
     val jsonSchema = maybeDataSchema.getOrElse {
       val files = cachedLeafStatuses().filterNot { status =>
         val name = status.getPath.getName
         name.startsWith("_") || name.startsWith(".")
       }.toArray
-      InferSchema(
+      InferSchema.infer(
         inputRDD.getOrElse(createBaseRdd(files)),
-        samplingRatio,
         sqlContext.conf.columnNameOfCorruptRecord,
-        primitivesAsString)
+        options)
     }
     checkConstraints(jsonSchema)
 
@@ -132,10 +127,11 @@ private[sql] class JSONRelation(
       inputPaths: Array[FileStatus],
       broadcastedConf: Broadcast[SerializableConfiguration]): RDD[InternalRow] = {
     val requiredDataSchema = StructType(requiredColumns.map(dataSchema(_)))
-    val rows = JacksonParser(
+    val rows = JacksonParser.parse(
       inputRDD.getOrElse(createBaseRdd(inputPaths)),
       requiredDataSchema,
-      sqlContext.conf.columnNameOfCorruptRecord)
+      sqlContext.conf.columnNameOfCorruptRecord,
+      options)
 
     rows.mapPartitions { iterator =>
       val unsafeProjection = UnsafeProjection.create(requiredDataSchema)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
index 4f53eeb081b9..bfa140504105 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/json/JacksonParser.scala
@@ -18,11 +18,10 @@
 package org.apache.spark.sql.execution.datasources.json
 
 import java.io.ByteArrayOutputStream
+import scala.collection.mutable.ArrayBuffer
 
 import com.fasterxml.jackson.core._
 
-import scala.collection.mutable.ArrayBuffer
-
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions._
@@ -32,18 +31,23 @@ import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 import org.apache.spark.util.Utils
 
-private[sql] object JacksonParser {
-  def apply(
-      json: RDD[String],
+object JacksonParser {
+
+  def parse(
+      input: RDD[String],
       schema: StructType,
-      columnNameOfCorruptRecords: String): RDD[InternalRow] = {
-    parseJson(json, schema, columnNameOfCorruptRecords)
+      columnNameOfCorruptRecords: String,
+      configOptions: JSONOptions): RDD[InternalRow] = {
+
+    input.mapPartitions { iter =>
+      parseJson(iter, schema, columnNameOfCorruptRecords, configOptions)
+    }
   }
 
   /**
    * Parse the current token (and related children) according to a desired schema
    */
-  private[sql] def convertField(
+  def convertField(
       factory: JsonFactory,
       parser: JsonParser,
       schema: DataType): Any = {
@@ -226,9 +230,10 @@ private[sql] object JacksonParser {
   }
 
   private def parseJson(
-      json: RDD[String],
+      input: Iterator[String],
       schema: StructType,
-      columnNameOfCorruptRecords: String): RDD[InternalRow] = {
+      columnNameOfCorruptRecords: String,
+      configOptions: JSONOptions): Iterator[InternalRow] = {
 
     def failedRecord(record: String): Seq[InternalRow] = {
       // create a row even if no corrupt record column is present
@@ -241,37 +246,36 @@ private[sql] object JacksonParser {
       Seq(row)
     }
 
-    json.mapPartitions { iter =>
-      val factory = new JsonFactory()
-
-      iter.flatMap { record =>
-        if (record.trim.isEmpty) {
-          Nil
-        } else {
-          try {
-            Utils.tryWithResource(factory.createParser(record)) { parser =>
-              parser.nextToken()
-
-              convertField(factory, parser, schema) match {
-                case null => failedRecord(record)
-                case row: InternalRow => row :: Nil
-                case array: ArrayData =>
-                  if (array.numElements() == 0) {
-                    Nil
-                  } else {
-                    array.toArray[InternalRow](schema)
-                  }
-                case _ =>
-                  sys.error(
-                    s"Failed to parse record $record. Please make sure that each line of " +
-                      "the file (or each string in the RDD) is a valid JSON object or " +
-                      "an array of JSON objects.")
-              }
+    val factory = new JsonFactory()
+    configOptions.setJacksonOptions(factory)
+
+    input.flatMap { record =>
+      if (record.trim.isEmpty) {
+        Nil
+      } else {
+        try {
+          Utils.tryWithResource(factory.createParser(record)) { parser =>
+            parser.nextToken()
+
+            convertField(factory, parser, schema) match {
+              case null => failedRecord(record)
+              case row: InternalRow => row :: Nil
+              case array: ArrayData =>
+                if (array.numElements() == 0) {
+                  Nil
+                } else {
+                  array.toArray[InternalRow](schema)
+                }
+              case _ =>
+                sys.error(
+                  s"Failed to parse record $record. Please make sure that each line of " +
+                    "the file (or each string in the RDD) is a valid JSON object or " +
+                    "an array of JSON objects.")
             }
-          } catch {
-            case _: JsonProcessingException =>
-              failedRecord(record)
           }
+        } catch {
+          case _: JsonProcessingException =>
+            failedRecord(record)
         }
       }
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonParsingOptionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonParsingOptionsSuite.scala
new file mode 100644
index 000000000000..4cc0a3a9585d
--- /dev/null
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonParsingOptionsSuite.scala
@@ -0,0 +1,114 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.json
+
+import org.apache.spark.sql.QueryTest
+import org.apache.spark.sql.test.SharedSQLContext
+
+/**
+ * Test cases for various [[JSONOptions]].
+ */
+class JsonParsingOptionsSuite extends QueryTest with SharedSQLContext {
+
+  test("allowComments off") {
+    val str = """{'name': /* hello */ 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.json(rdd)
+
+    assert(df.schema.head.name == "_corrupt_record")
+  }
+
+  test("allowComments on") {
+    val str = """{'name': /* hello */ 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.option("allowComments", "true").json(rdd)
+
+    assert(df.schema.head.name == "name")
+    assert(df.first().getString(0) == "Reynold Xin")
+  }
+
+  test("allowSingleQuotes off") {
+    val str = """{'name': 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.option("allowSingleQuotes", "false").json(rdd)
+
+    assert(df.schema.head.name == "_corrupt_record")
+  }
+
+  test("allowSingleQuotes on") {
+    val str = """{'name': 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.json(rdd)
+
+    assert(df.schema.head.name == "name")
+    assert(df.first().getString(0) == "Reynold Xin")
+  }
+
+  test("allowUnquotedFieldNames off") {
+    val str = """{name: 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.json(rdd)
+
+    assert(df.schema.head.name == "_corrupt_record")
+  }
+
+  test("allowUnquotedFieldNames on") {
+    val str = """{name: 'Reynold Xin'}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.option("allowUnquotedFieldNames", "true").json(rdd)
+
+    assert(df.schema.head.name == "name")
+    assert(df.first().getString(0) == "Reynold Xin")
+  }
+
+  test("allowNumericLeadingZeros off") {
+    val str = """{"age": 0018}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.json(rdd)
+
+    assert(df.schema.head.name == "_corrupt_record")
+  }
+
+  test("allowNumericLeadingZeros on") {
+    val str = """{"age": 0018}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.option("allowNumericLeadingZeros", "true").json(rdd)
+
+    assert(df.schema.head.name == "age")
+    assert(df.first().getLong(0) == 18)
+  }
+
+  // The following two tests are not really working - need to look into Jackson's
+  // JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS.
+  ignore("allowNonNumericNumbers off") {
+    val str = """{"age": NaN}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.json(rdd)
+
+    assert(df.schema.head.name == "_corrupt_record")
+  }
+
+  ignore("allowNonNumericNumbers on") {
+    val str = """{"age": NaN}"""
+    val rdd = sqlContext.sparkContext.parallelize(Seq(str))
+    val df = sqlContext.read.option("allowNonNumericNumbers", "true").json(rdd)
+
+    assert(df.schema.head.name == "age")
+    assert(df.first().getDouble(0).isNaN)
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index 28b8f02bdf87..6042b1178aff 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -588,7 +588,7 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
       relation.isInstanceOf[JSONRelation],
       "The DataFrame returned by jsonFile should be based on JSONRelation.")
     assert(relation.asInstanceOf[JSONRelation].paths === Array(path))
-    assert(relation.asInstanceOf[JSONRelation].samplingRatio === (0.49 +- 0.001))
+    assert(relation.asInstanceOf[JSONRelation].options.samplingRatio === (0.49 +- 0.001))
 
     val schema = StructType(StructField("a", LongType, true) :: Nil)
     val logicalRelation =
@@ -597,7 +597,7 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
     val relationWithSchema = logicalRelation.relation.asInstanceOf[JSONRelation]
     assert(relationWithSchema.paths === Array(path))
     assert(relationWithSchema.schema === schema)
-    assert(relationWithSchema.samplingRatio > 0.99)
+    assert(relationWithSchema.options.samplingRatio > 0.99)
   }
 
   test("Loading a JSON dataset from a text file") {
@@ -1165,31 +1165,28 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
   test("JSONRelation equality test") {
     val relation0 = new JSONRelation(
       Some(empty),
-      1.0,
-      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
-      None, None)(sqlContext)
+      None,
+      None)(sqlContext)
     val logicalRelation0 = LogicalRelation(relation0)
     val relation1 = new JSONRelation(
       Some(singleRow),
-      1.0,
-      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
-      None, None)(sqlContext)
+      None,
+      None)(sqlContext)
     val logicalRelation1 = LogicalRelation(relation1)
     val relation2 = new JSONRelation(
       Some(singleRow),
-      0.5,
-      false,
       Some(StructType(StructField("a", IntegerType, true) :: Nil)),
-      None, None)(sqlContext)
+      None,
+      None,
+      parameters = Map("samplingRatio" -> "0.5"))(sqlContext)
     val logicalRelation2 = LogicalRelation(relation2)
     val relation3 = new JSONRelation(
       Some(singleRow),
-      1.0,
-      false,
       Some(StructType(StructField("b", IntegerType, true) :: Nil)),
-      None, None)(sqlContext)
+      None,
+      None)(sqlContext)
     val logicalRelation3 = LogicalRelation(relation3)
 
     assert(relation0 !== relation1)
@@ -1232,7 +1229,7 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
 
   test("SPARK-6245 JsonRDD.inferSchema on empty RDD") {
     // This is really a test that it doesn't throw an exception
-    val emptySchema = InferSchema(empty, 1.0, "")
+    val emptySchema = InferSchema.infer(empty, "", JSONOptions())
     assert(StructType(Seq()) === emptySchema)
   }
 
@@ -1256,7 +1253,7 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
   }
 
   test("SPARK-8093 Erase empty structs") {
-    val emptySchema = InferSchema(emptyRecords, 1.0, "")
+    val emptySchema = InferSchema.infer(emptyRecords, "", JSONOptions())
     assert(StructType(Seq()) === emptySchema)
   }
 

From 7f8eb3bf6ed64eefc5472f5c5fb02e2db1e3f618 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Mon, 16 Nov 2015 21:30:10 +0800
Subject: [PATCH 694/896] [SPARK-11044][SQL] Parquet writer version fixed as
 version1

https://issues.apache.org/jira/browse/SPARK-11044

Spark writes a parquet file only with writer version1 ignoring the writer version given by user.

So, in this PR, it keeps the writer version if given or sets version1 as default.

Author: hyukjinkwon <gurwls223@gmail.com>
Author: HyukjinKwon <gurwls223@gmail.com>

Closes #9060 from HyukjinKwon/SPARK-11044.
---
 .../parquet/CatalystWriteSupport.scala        |  2 +-
 .../datasources/parquet/ParquetIOSuite.scala  | 34 +++++++++++++++++++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
index 483363d2c1a2..6862dea5e6c3 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystWriteSupport.scala
@@ -429,7 +429,7 @@ private[parquet] object CatalystWriteSupport {
   def setSchema(schema: StructType, configuration: Configuration): Unit = {
     schema.map(_.name).foreach(CatalystSchemaConverter.checkFieldName)
     configuration.set(SPARK_ROW_SCHEMA, schema.json)
-    configuration.set(
+    configuration.setIfUnset(
       ParquetOutputFormat.WRITER_VERSION,
       ParquetProperties.WriterVersion.PARQUET_1_0.toString)
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 78df363ade5c..2aa5dca847c8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -19,6 +19,8 @@ package org.apache.spark.sql.execution.datasources.parquet
 
 import java.util.Collections
 
+import org.apache.parquet.column.{Encoding, ParquetProperties}
+
 import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.TypeTag
@@ -534,6 +536,38 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
+  test("SPARK-11044 Parquet writer version fixed as version1 ") {
+    // For dictionary encoding, Parquet changes the encoding types according to its writer
+    // version. So, this test checks one of the encoding types in order to ensure that
+    // the file is written with writer version2.
+    withTempPath { dir =>
+      val clonedConf = new Configuration(hadoopConfiguration)
+      try {
+        // Write a Parquet file with writer version2.
+        hadoopConfiguration.set(ParquetOutputFormat.WRITER_VERSION,
+          ParquetProperties.WriterVersion.PARQUET_2_0.toString)
+
+        // By default, dictionary encoding is enabled from Parquet 1.2.0 but
+        // it is enabled just in case.
+        hadoopConfiguration.setBoolean(ParquetOutputFormat.ENABLE_DICTIONARY, true)
+        val path = s"${dir.getCanonicalPath}/part-r-0.parquet"
+        sqlContext.range(1 << 16).selectExpr("(id % 4) AS i")
+          .coalesce(1).write.mode("overwrite").parquet(path)
+
+        val blockMetadata = readFooter(new Path(path), hadoopConfiguration).getBlocks.asScala.head
+        val columnChunkMetadata = blockMetadata.getColumns.asScala.head
+
+        // If the file is written with version2, this should include
+        // Encoding.RLE_DICTIONARY type. For version1, it is Encoding.PLAIN_DICTIONARY
+        assert(columnChunkMetadata.getEncodings.contains(Encoding.RLE_DICTIONARY))
+      } finally {
+        // Manually clear the hadoop configuration for other tests.
+        hadoopConfiguration.clear()
+        clonedConf.asScala.foreach(entry => hadoopConfiguration.set(entry.getKey, entry.getValue))
+      }
+    }
+  }
+
   test("read dictionary encoded decimals written as INT32") {
     checkAnswer(
       // Decimal column in this file is encoded using plain dictionary

From e388b39d10fc269cdd3d630ea7d4ae80fd0efa97 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Mon, 16 Nov 2015 21:59:33 +0800
Subject: [PATCH 695/896] [SPARK-11692][SQL] Support for Parquet logical types,
 JSON and  BSON (embedded types)

Parquet supports some JSON and BSON datatypes. They are represented as binary for BSON and string (UTF-8) for JSON internally.

I searched a bit and found Apache drill also supports both in this way, [link](https://drill.apache.org/docs/parquet-format/).

Author: hyukjinkwon <gurwls223@gmail.com>
Author: Hyukjin Kwon <gurwls223@gmail.com>

Closes #9658 from HyukjinKwon/SPARK-11692.
---
 .../parquet/CatalystSchemaConverter.scala     |  3 ++-
 .../datasources/parquet/ParquetIOSuite.scala  | 25 +++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
index f28a18e2756e..5f9f9083098a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystSchemaConverter.scala
@@ -170,9 +170,10 @@ private[parquet] class CatalystSchemaConverter(
 
       case BINARY =>
         originalType match {
-          case UTF8 | ENUM => StringType
+          case UTF8 | ENUM | JSON => StringType
           case null if assumeBinaryIsString => StringType
           case null => BinaryType
+          case BSON => BinaryType
           case DECIMAL => makeDecimalType()
           case _ => illegalType()
         }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 2aa5dca847c8..a148facd056a 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -259,6 +259,31 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
+  test("SPARK-11692 Support for Parquet logical types, JSON and BSON (embedded types)") {
+    val parquetSchema = MessageTypeParser.parseMessageType(
+      """message root {
+        |  required binary a(JSON);
+        |  required binary b(BSON);
+        |}
+      """.stripMargin)
+
+    withTempPath { location =>
+      val extraMetadata = Map.empty[String, String].asJava
+      val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, "Spark")
+      val path = new Path(location.getCanonicalPath)
+      val footer = List(
+        new Footer(path, new ParquetMetadata(fileMetadata, Collections.emptyList()))
+      ).asJava
+
+      ParquetFileWriter.writeMetadataFile(sparkContext.hadoopConfiguration, path, footer)
+
+      val jsonDataType = sqlContext.read.parquet(path.toString).schema(0).dataType
+      assert(jsonDataType === StringType)
+      val bsonDataType = sqlContext.read.parquet(path.toString).schema(1).dataType
+      assert(bsonDataType === BinaryType)
+    }
+  }
+
   test("compression codec") {
     def compressionCodecFor(path: String, codecName: String): String = {
       val codecs = for {

From 0e79604aed116bdcb40e03553a2d103b5b1cdbae Mon Sep 17 00:00:00 2001
From: xin Wu <xinwu@us.ibm.com>
Date: Mon, 16 Nov 2015 08:10:48 -0800
Subject: [PATCH 696/896] [SPARK-11522][SQL] input_file_name() returns "" for
 external tables

When computing partition for non-parquet relation, `HadoopRDD.compute` is used. but it does not set the thread local variable `inputFileName` in `NewSqlHadoopRDD`, like `NewSqlHadoopRDD.compute` does.. Yet, when getting the `inputFileName`, `NewSqlHadoopRDD.inputFileName` is exptected, which is empty now.
Adding the setting inputFileName in HadoopRDD.compute resolves this issue.

Author: xin Wu <xinwu@us.ibm.com>

Closes #9542 from xwu0226/SPARK-11522.
---
 .../org/apache/spark/rdd/HadoopRDD.scala      |  7 ++
 .../sql/hive/execution/HiveUDFSuite.scala     | 93 ++++++++++++++++++-
 2 files changed, 98 insertions(+), 2 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
index 0453614f6a1d..7db583468792 100644
--- a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -213,6 +213,12 @@ class HadoopRDD[K, V](
 
       val inputMetrics = context.taskMetrics.getInputMetricsForReadMethod(DataReadMethod.Hadoop)
 
+      // Sets the thread local variable for the file's name
+      split.inputSplit.value match {
+        case fs: FileSplit => SqlNewHadoopRDD.setInputFileName(fs.getPath.toString)
+        case _ => SqlNewHadoopRDD.unsetInputFileName()
+      }
+
       // Find a function that will return the FileSystem bytes read by this thread. Do this before
       // creating RecordReader, because RecordReader's constructor might read some bytes
       val bytesReadCallback = inputMetrics.bytesReadCallback.orElse {
@@ -250,6 +256,7 @@ class HadoopRDD[K, V](
 
       override def close() {
         if (reader != null) {
+          SqlNewHadoopRDD.unsetInputFileName()
           // Close the reader and release it. Note: it's very important that we don't close the
           // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
           // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
index 5ab477efc4ee..9deb1a6db15a 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveUDFSuite.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.hive.execution
 
-import java.io.{DataInput, DataOutput}
+import java.io.{PrintWriter, File, DataInput, DataOutput}
 import java.util.{ArrayList, Arrays, Properties}
 
 import org.apache.hadoop.conf.Configuration
@@ -28,6 +28,7 @@ import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectIn
 import org.apache.hadoop.hive.serde2.objectinspector.{ObjectInspector, ObjectInspectorFactory}
 import org.apache.hadoop.hive.serde2.{AbstractSerDe, SerDeStats}
 import org.apache.hadoop.io.Writable
+import org.apache.spark.sql.test.SQLTestUtils
 import org.apache.spark.sql.{AnalysisException, QueryTest, Row}
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.util.Utils
@@ -44,7 +45,7 @@ case class ListStringCaseClass(l: Seq[String])
 /**
  * A test suite for Hive custom UDFs.
  */
-class HiveUDFSuite extends QueryTest with TestHiveSingleton {
+class HiveUDFSuite extends QueryTest with TestHiveSingleton with SQLTestUtils {
 
   import hiveContext.{udf, sql}
   import hiveContext.implicits._
@@ -348,6 +349,94 @@ class HiveUDFSuite extends QueryTest with TestHiveSingleton {
 
     sqlContext.dropTempTable("testUDF")
   }
+
+  test("SPARK-11522 select input_file_name from non-parquet table"){
+
+    withTempDir { tempDir =>
+
+      // EXTERNAL OpenCSVSerde table pointing to LOCATION
+
+      val file1 = new File(tempDir + "/data1")
+      val writer1 = new PrintWriter(file1)
+      writer1.write("1,2")
+      writer1.close()
+
+      val file2 = new File(tempDir + "/data2")
+      val writer2 = new PrintWriter(file2)
+      writer2.write("1,2")
+      writer2.close()
+
+      sql(
+        s"""CREATE EXTERNAL TABLE csv_table(page_id INT, impressions INT)
+        ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.OpenCSVSerde'
+        WITH SERDEPROPERTIES (
+          \"separatorChar\" = \",\",
+          \"quoteChar\"     = \"\\\"\",
+          \"escapeChar\"    = \"\\\\\")
+        LOCATION '$tempDir'
+      """)
+
+      val answer1 =
+        sql("SELECT input_file_name() FROM csv_table").head().getString(0)
+      assert(answer1.contains("data1") || answer1.contains("data2"))
+
+      val count1 = sql("SELECT input_file_name() FROM csv_table").distinct().count()
+      assert(count1 == 2)
+      sql("DROP TABLE csv_table")
+
+      // EXTERNAL pointing to LOCATION
+
+      sql(
+        s"""CREATE EXTERNAL TABLE external_t5 (c1 int, c2 int)
+        ROW FORMAT DELIMITED FIELDS TERMINATED BY ','
+        LOCATION '$tempDir'
+      """)
+
+      val answer2 =
+        sql("SELECT input_file_name() as file FROM external_t5").head().getString(0)
+      assert(answer1.contains("data1") || answer1.contains("data2"))
+
+      val count2 = sql("SELECT input_file_name() as file FROM external_t5").distinct().count
+      assert(count2 == 2)
+      sql("DROP TABLE external_t5")
+    }
+
+    withTempDir { tempDir =>
+
+      // External parquet pointing to LOCATION
+
+      val parquetLocation = tempDir + "/external_parquet"
+      sql("SELECT 1, 2").write.parquet(parquetLocation)
+
+      sql(
+        s"""CREATE EXTERNAL TABLE external_parquet(c1 int, c2 int)
+        STORED AS PARQUET
+        LOCATION '$parquetLocation'
+      """)
+
+      val answer3 =
+        sql("SELECT input_file_name() as file FROM external_parquet").head().getString(0)
+      assert(answer3.contains("external_parquet"))
+
+      val count3 = sql("SELECT input_file_name() as file FROM external_parquet").distinct().count
+      assert(count3 == 1)
+      sql("DROP TABLE external_parquet")
+    }
+
+    // Non-External parquet pointing to /tmp/...
+
+    sql("CREATE TABLE parquet_tmp(c1 int, c2 int) " +
+      " STORED AS parquet " +
+      " AS SELECT 1, 2")
+
+    val answer4 =
+      sql("SELECT input_file_name() as file FROM parquet_tmp").head().getString(0)
+    assert(answer4.contains("parquet_tmp"))
+
+    val count4 = sql("SELECT input_file_name() as file FROM parquet_tmp").distinct().count
+    assert(count4 == 1)
+    sql("DROP TABLE parquet_tmp")
+  }
 }
 
 class TestPair(x: Int, y: Int) extends Writable with Serializable {

From 06f1fdba6d1425afddfc1d45a20dbe9bede15e7a Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 16 Nov 2015 08:58:40 -0800
Subject: [PATCH 697/896] [SPARK-11752] [SQL] fix timezone problem for
 DateTimeUtils.getSeconds

code snippet to reproduce it:
```
TimeZone.setDefault(TimeZone.getTimeZone("Asia/Shanghai"))
val t = Timestamp.valueOf("1900-06-11 12:14:50.789")
val us = fromJavaTimestamp(t)
assert(getSeconds(us) === t.getSeconds)
```

it will be good to add a regression test for it, but the reproducing code need to change the default timezone, and even we change it back, the `lazy val defaultTimeZone` in `DataTimeUtils` is fixed.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9728 from cloud-fan/seconds.
---
 .../spark/sql/catalyst/util/DateTimeUtils.scala    | 14 ++++++++------
 .../sql/catalyst/util/DateTimeUtilsSuite.scala     |  2 +-
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index deff8a5378b9..8fb3f41f1bd6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -395,16 +395,19 @@ object DateTimeUtils {
   /**
    * Returns the microseconds since year zero (-17999) from microseconds since epoch.
    */
-  def absoluteMicroSecond(microsec: SQLTimestamp): SQLTimestamp = {
+  private def absoluteMicroSecond(microsec: SQLTimestamp): SQLTimestamp = {
     microsec + toYearZero * MICROS_PER_DAY
   }
 
+  private def localTimestamp(microsec: SQLTimestamp): SQLTimestamp = {
+    absoluteMicroSecond(microsec) + defaultTimeZone.getOffset(microsec / 1000) * 1000L
+  }
+
   /**
    * Returns the hour value of a given timestamp value. The timestamp is expressed in microseconds.
    */
   def getHours(microsec: SQLTimestamp): Int = {
-    val localTs = absoluteMicroSecond(microsec) + defaultTimeZone.getOffset(microsec / 1000) * 1000L
-    ((localTs / MICROS_PER_SECOND / 3600) % 24).toInt
+    ((localTimestamp(microsec) / MICROS_PER_SECOND / 3600) % 24).toInt
   }
 
   /**
@@ -412,8 +415,7 @@ object DateTimeUtils {
    * microseconds.
    */
   def getMinutes(microsec: SQLTimestamp): Int = {
-    val localTs = absoluteMicroSecond(microsec) + defaultTimeZone.getOffset(microsec / 1000) * 1000L
-    ((localTs / MICROS_PER_SECOND / 60) % 60).toInt
+    ((localTimestamp(microsec) / MICROS_PER_SECOND / 60) % 60).toInt
   }
 
   /**
@@ -421,7 +423,7 @@ object DateTimeUtils {
    * microseconds.
    */
   def getSeconds(microsec: SQLTimestamp): Int = {
-    ((absoluteMicroSecond(microsec) / MICROS_PER_SECOND) % 60).toInt
+    ((localTimestamp(microsec) / MICROS_PER_SECOND) % 60).toInt
   }
 
   private[this] def isLeapYear(year: Int): Boolean = {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
index 64d15e6b910c..60d45422bc9b 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
@@ -358,7 +358,7 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     assert(getSeconds(c.getTimeInMillis * 1000) === 9)
   }
 
-  test("hours / miniute / seconds") {
+  test("hours / minutes / seconds") {
     Seq(Timestamp.valueOf("2015-06-11 10:12:35.789"),
       Timestamp.valueOf("2015-06-11 20:13:40.789"),
       Timestamp.valueOf("1900-06-11 12:14:50.789"),

From b0c3fd34e4cfa3f0472d83e71ffe774430cfdc87 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 16 Nov 2015 09:03:42 -0800
Subject: [PATCH 698/896] [SPARK-11743] [SQL] Add UserDefinedType support to
 RowEncoder

JIRA: https://issues.apache.org/jira/browse/SPARK-11743

RowEncoder doesn't support UserDefinedType now. We should add the support for it.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9712 from viirya/rowencoder-udt.
---
 .../main/scala/org/apache/spark/sql/Row.scala | 14 +++-
 .../sql/catalyst/encoders/RowEncoder.scala    | 24 +++++-
 .../sql/catalyst/expressions/objects.scala    | 48 +++++------
 .../catalyst/encoders/RowEncoderSuite.scala   | 82 ++++++++++++++++++-
 4 files changed, 139 insertions(+), 29 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
index ed2fdf9f2f7c..0f0f200122c3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
@@ -152,7 +152,7 @@ trait Row extends Serializable {
    *   BinaryType -> byte array
    *   ArrayType -> scala.collection.Seq (use getList for java.util.List)
    *   MapType -> scala.collection.Map (use getJavaMap for java.util.Map)
-   *   StructType -> org.apache.spark.sql.Row
+   *   StructType -> org.apache.spark.sql.Row (or Product)
    * }}}
    */
   def apply(i: Int): Any = get(i)
@@ -177,7 +177,7 @@ trait Row extends Serializable {
    *   BinaryType -> byte array
    *   ArrayType -> scala.collection.Seq (use getList for java.util.List)
    *   MapType -> scala.collection.Map (use getJavaMap for java.util.Map)
-   *   StructType -> org.apache.spark.sql.Row
+   *   StructType -> org.apache.spark.sql.Row (or Product)
    * }}}
    */
   def get(i: Int): Any
@@ -306,7 +306,15 @@ trait Row extends Serializable {
    *
    * @throws ClassCastException when data type does not match.
    */
-  def getStruct(i: Int): Row = getAs[Row](i)
+  def getStruct(i: Int): Row = {
+    // Product and Row both are recoginized as StructType in a Row
+    val t = get(i)
+    if (t.isInstanceOf[Product]) {
+      Row.fromTuple(t.asInstanceOf[Product])
+    } else {
+      t.asInstanceOf[Row]
+    }
+  }
 
   /**
    * Returns the value at position i.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index e0be896bb354..9bb1602494b6 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -50,6 +50,14 @@ object RowEncoder {
     case BooleanType | ByteType | ShortType | IntegerType | LongType |
          FloatType | DoubleType | BinaryType => inputObject
 
+    case udt: UserDefinedType[_] =>
+      val obj = NewInstance(
+        udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt(),
+        Nil,
+        false,
+        dataType = ObjectType(udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt()))
+      Invoke(obj, "serialize", udt.sqlType, inputObject :: Nil)
+
     case TimestampType =>
       StaticInvoke(
         DateTimeUtils,
@@ -109,11 +117,16 @@ object RowEncoder {
 
     case StructType(fields) =>
       val convertedFields = fields.zipWithIndex.map { case (f, i) =>
+        val method = if (f.dataType.isInstanceOf[StructType]) {
+          "getStruct"
+        } else {
+          "get"
+        }
         If(
           Invoke(inputObject, "isNullAt", BooleanType, Literal(i) :: Nil),
           Literal.create(null, f.dataType),
           extractorsFor(
-            Invoke(inputObject, "get", externalDataTypeFor(f.dataType), Literal(i) :: Nil),
+            Invoke(inputObject, method, externalDataTypeFor(f.dataType), Literal(i) :: Nil),
             f.dataType))
       }
       CreateStruct(convertedFields)
@@ -137,6 +150,7 @@ object RowEncoder {
     case _: ArrayType => ObjectType(classOf[scala.collection.Seq[_]])
     case _: MapType => ObjectType(classOf[scala.collection.Map[_, _]])
     case _: StructType => ObjectType(classOf[Row])
+    case udt: UserDefinedType[_] => ObjectType(udt.userClass)
   }
 
   private def constructorFor(schema: StructType): Expression = {
@@ -155,6 +169,14 @@ object RowEncoder {
     case BooleanType | ByteType | ShortType | IntegerType | LongType |
          FloatType | DoubleType | BinaryType => input
 
+    case udt: UserDefinedType[_] =>
+      val obj = NewInstance(
+        udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt(),
+        Nil,
+        false,
+        dataType = ObjectType(udt.userClass.getAnnotation(classOf[SQLUserDefinedType]).udt()))
+      Invoke(obj, "deserialize", ObjectType(udt.userClass), input :: Nil)
+
     case TimestampType =>
       StaticInvoke(
         DateTimeUtils,
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 4f58464221b4..5cd19de68391 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -113,7 +113,7 @@ case class Invoke(
     arguments: Seq[Expression] = Nil) extends Expression {
 
   override def nullable: Boolean = true
-  override def children: Seq[Expression] = targetObject :: Nil
+  override def children: Seq[Expression] = arguments.+:(targetObject)
 
   override def eval(input: InternalRow): Any =
     throw new UnsupportedOperationException("Only code-generated evaluation is supported.")
@@ -343,33 +343,35 @@ case class MapObjects(
   private lazy val loopAttribute = AttributeReference("loopVar", elementType)()
   private lazy val completeFunction = function(loopAttribute)
 
+  private def itemAccessorMethod(dataType: DataType): String => String = dataType match {
+    case IntegerType => (i: String) => s".getInt($i)"
+    case LongType => (i: String) => s".getLong($i)"
+    case FloatType => (i: String) => s".getFloat($i)"
+    case DoubleType => (i: String) => s".getDouble($i)"
+    case ByteType => (i: String) => s".getByte($i)"
+    case ShortType => (i: String) => s".getShort($i)"
+    case BooleanType => (i: String) => s".getBoolean($i)"
+    case StringType => (i: String) => s".getUTF8String($i)"
+    case s: StructType => (i: String) => s".getStruct($i, ${s.size})"
+    case a: ArrayType => (i: String) => s".getArray($i)"
+    case _: MapType => (i: String) => s".getMap($i)"
+    case udt: UserDefinedType[_] => itemAccessorMethod(udt.sqlType)
+  }
+
   private lazy val (lengthFunction, itemAccessor, primitiveElement) = inputData.dataType match {
     case ObjectType(cls) if classOf[Seq[_]].isAssignableFrom(cls) =>
       (".size()", (i: String) => s".apply($i)", false)
     case ObjectType(cls) if cls.isArray =>
       (".length", (i: String) => s"[$i]", false)
-    case ArrayType(s: StructType, _) =>
-      (".numElements()", (i: String) => s".getStruct($i, ${s.size})", false)
-    case ArrayType(a: ArrayType, _) =>
-      (".numElements()", (i: String) => s".getArray($i)", true)
-    case ArrayType(IntegerType, _) =>
-      (".numElements()", (i: String) => s".getInt($i)", true)
-    case ArrayType(LongType, _) =>
-      (".numElements()", (i: String) => s".getLong($i)", true)
-    case ArrayType(FloatType, _) =>
-      (".numElements()", (i: String) => s".getFloat($i)", true)
-    case ArrayType(DoubleType, _) =>
-      (".numElements()", (i: String) => s".getDouble($i)", true)
-    case ArrayType(ByteType, _) =>
-      (".numElements()", (i: String) => s".getByte($i)", true)
-    case ArrayType(ShortType, _) =>
-      (".numElements()", (i: String) => s".getShort($i)", true)
-    case ArrayType(BooleanType, _) =>
-      (".numElements()", (i: String) => s".getBoolean($i)", true)
-    case ArrayType(StringType, _) =>
-      (".numElements()", (i: String) => s".getUTF8String($i)", false)
-    case ArrayType(_: MapType, _) =>
-      (".numElements()", (i: String) => s".getMap($i)", false)
+    case ArrayType(t, _) =>
+      val (sqlType, primitiveElement) = t match {
+        case m: MapType => (m, false)
+        case s: StructType => (s, false)
+        case s: StringType => (s, false)
+        case udt: UserDefinedType[_] => (udt.sqlType, false)
+        case o => (o, true)
+      }
+      (".numElements()", itemAccessorMethod(sqlType), primitiveElement)
   }
 
   override def nullable: Boolean = true
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
index e8301e8e06b5..c868ddec1bab 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
@@ -19,14 +19,62 @@ package org.apache.spark.sql.catalyst.encoders
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.{RandomDataGenerator, Row}
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
+@SQLUserDefinedType(udt = classOf[ExamplePointUDT])
+class ExamplePoint(val x: Double, val y: Double) extends Serializable {
+  override def hashCode: Int = 41 * (41 + x.toInt) + y.toInt
+  override def equals(that: Any): Boolean = {
+    if (that.isInstanceOf[ExamplePoint]) {
+      val e = that.asInstanceOf[ExamplePoint]
+      (this.x == e.x || (this.x.isNaN && e.x.isNaN) || (this.x.isInfinity && e.x.isInfinity)) &&
+        (this.y == e.y || (this.y.isNaN && e.y.isNaN) || (this.y.isInfinity && e.y.isInfinity))
+    } else {
+      false
+    }
+  }
+}
+
+/**
+ * User-defined type for [[ExamplePoint]].
+ */
+class ExamplePointUDT extends UserDefinedType[ExamplePoint] {
+
+  override def sqlType: DataType = ArrayType(DoubleType, false)
+
+  override def pyUDT: String = "pyspark.sql.tests.ExamplePointUDT"
+
+  override def serialize(obj: Any): GenericArrayData = {
+    obj match {
+      case p: ExamplePoint =>
+        val output = new Array[Any](2)
+        output(0) = p.x
+        output(1) = p.y
+        new GenericArrayData(output)
+    }
+  }
+
+  override def deserialize(datum: Any): ExamplePoint = {
+    datum match {
+      case values: ArrayData =>
+        new ExamplePoint(values.getDouble(0), values.getDouble(1))
+    }
+  }
+
+  override def userClass: Class[ExamplePoint] = classOf[ExamplePoint]
+
+  private[spark] override def asNullable: ExamplePointUDT = this
+}
+
 class RowEncoderSuite extends SparkFunSuite {
 
   private val structOfString = new StructType().add("str", StringType)
+  private val structOfUDT = new StructType().add("udt", new ExamplePointUDT, false)
   private val arrayOfString = ArrayType(StringType)
   private val mapOfString = MapType(StringType, StringType)
+  private val arrayOfUDT = ArrayType(new ExamplePointUDT, false)
 
   encodeDecodeTest(
     new StructType()
@@ -41,7 +89,8 @@ class RowEncoderSuite extends SparkFunSuite {
       .add("string", StringType)
       .add("binary", BinaryType)
       .add("date", DateType)
-      .add("timestamp", TimestampType))
+      .add("timestamp", TimestampType)
+      .add("udt", new ExamplePointUDT, false))
 
   encodeDecodeTest(
     new StructType()
@@ -68,7 +117,36 @@ class RowEncoderSuite extends SparkFunSuite {
       .add("structOfArray", new StructType().add("array", arrayOfString))
       .add("structOfMap", new StructType().add("map", mapOfString))
       .add("structOfArrayAndMap",
-        new StructType().add("array", arrayOfString).add("map", mapOfString)))
+        new StructType().add("array", arrayOfString).add("map", mapOfString))
+      .add("structOfUDT", structOfUDT))
+
+  test(s"encode/decode: arrayOfUDT") {
+    val schema = new StructType()
+      .add("arrayOfUDT", arrayOfUDT)
+
+    val encoder = RowEncoder(schema)
+
+    val input: Row = Row(Seq(new ExamplePoint(0.1, 0.2), new ExamplePoint(0.3, 0.4)))
+    val row = encoder.toRow(input)
+    val convertedBack = encoder.fromRow(row)
+    assert(input.getSeq[ExamplePoint](0) == convertedBack.getSeq[ExamplePoint](0))
+  }
+
+  test(s"encode/decode: Product") {
+    val schema = new StructType()
+      .add("structAsProduct",
+        new StructType()
+          .add("int", IntegerType)
+          .add("string", StringType)
+          .add("double", DoubleType))
+
+    val encoder = RowEncoder(schema)
+
+    val input: Row = Row((100, "test", 0.123))
+    val row = encoder.toRow(input)
+    val convertedBack = encoder.fromRow(row)
+    assert(input.getStruct(0) == convertedBack.getStruct(0))
+  }
 
   private def encodeDecodeTest(schema: StructType): Unit = {
     test(s"encode/decode: ${schema.simpleString}") {

From de5e531d337075fd849437e88846873bca8685e6 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Mon, 16 Nov 2015 11:21:17 -0800
Subject: [PATCH 699/896] [SPARK-11731][STREAMING] Enable batching on Driver
 WriteAheadLog by default

Using batching on the driver for the WriteAheadLog should be an improvement for all environments and use cases. Users will be able to scale to much higher number of receivers with the BatchedWriteAheadLog. Therefore we should turn it on by default, and QA it in the QA period.

I've also added some tests to make sure the default configurations are correct regarding recent additions:
 - batching on by default
 - closeFileAfterWrite off by default
 - parallelRecovery off by default

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9695 from brkyvz/enable-batch-wal.
---
 .../streaming/util/WriteAheadLogUtils.scala   |  2 +-
 .../streaming/JavaWriteAheadLogSuite.java     |  1 +
 .../streaming/ReceivedBlockTrackerSuite.scala |  9 +++++--
 .../streaming/util/WriteAheadLogSuite.scala   | 24 ++++++++++++++++++-
 .../util/WriteAheadLogUtilsSuite.scala        | 19 ++++++++++++---
 5 files changed, 48 insertions(+), 7 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
index 731a369fc92c..7f9e2c973497 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/WriteAheadLogUtils.scala
@@ -67,7 +67,7 @@ private[streaming] object WriteAheadLogUtils extends Logging {
   }
 
   def isBatchingEnabled(conf: SparkConf, isDriver: Boolean): Boolean = {
-    isDriver && conf.getBoolean(DRIVER_WAL_BATCHING_CONF_KEY, defaultValue = false)
+    isDriver && conf.getBoolean(DRIVER_WAL_BATCHING_CONF_KEY, defaultValue = true)
   }
 
   /**
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaWriteAheadLogSuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaWriteAheadLogSuite.java
index 175b8a496b4e..09b5f8ed0327 100644
--- a/streaming/src/test/java/org/apache/spark/streaming/JavaWriteAheadLogSuite.java
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaWriteAheadLogSuite.java
@@ -108,6 +108,7 @@ public void close() {
   public void testCustomWAL() {
     SparkConf conf = new SparkConf();
     conf.set("spark.streaming.driver.writeAheadLog.class", JavaWriteAheadLogSuite.class.getName());
+    conf.set("spark.streaming.driver.writeAheadLog.allowBatching", "false");
     WriteAheadLog wal = WriteAheadLogUtils.createLogForDriver(conf, null, null);
 
     String data1 = "data1";
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
index 7db17abb7947..081f5a1c93e6 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/ReceivedBlockTrackerSuite.scala
@@ -330,8 +330,13 @@ class ReceivedBlockTrackerSuite
     : Seq[ReceivedBlockTrackerLogEvent] = {
     logFiles.flatMap {
       file => new FileBasedWriteAheadLogReader(file, hadoopConf).toSeq
-    }.map { byteBuffer =>
-      Utils.deserialize[ReceivedBlockTrackerLogEvent](byteBuffer.array)
+    }.flatMap { byteBuffer =>
+      val validBuffer = if (WriteAheadLogUtils.isBatchingEnabled(conf, isDriver = true)) {
+        Utils.deserialize[Array[Array[Byte]]](byteBuffer.array()).map(ByteBuffer.wrap)
+      } else {
+        Array(byteBuffer)
+      }
+      validBuffer.map(b => Utils.deserialize[ReceivedBlockTrackerLogEvent](b.array()))
     }.toList
   }
 
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index 4273fd7dda8b..7f80d6ecdbbb 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -20,7 +20,7 @@ import java.io._
 import java.nio.ByteBuffer
 import java.util.{Iterator => JIterator}
 import java.util.concurrent.atomic.AtomicInteger
-import java.util.concurrent.{TimeUnit, CountDownLatch, ThreadPoolExecutor}
+import java.util.concurrent.{RejectedExecutionException, TimeUnit, CountDownLatch, ThreadPoolExecutor}
 
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
@@ -190,6 +190,28 @@ abstract class CommonWriteAheadLogTests(
     }
     assert(!nonexistentTempPath.exists(), "Directory created just by attempting to read segment")
   }
+
+  test(testPrefix + "parallel recovery not enabled if closeFileAfterWrite = false") {
+    // write some data
+    val writtenData = (1 to 10).map { i =>
+      val data = generateRandomData()
+      val file = testDir + s"/log-$i-$i"
+      writeDataManually(data, file, allowBatching)
+      data
+    }.flatten
+
+    val wal = createWriteAheadLog(testDir, closeFileAfterWrite, allowBatching)
+    // create iterator but don't materialize it
+    val readData = wal.readAll().asScala.map(byteBufferToString)
+    wal.close()
+    if (closeFileAfterWrite) {
+      // the threadpool is shutdown by the wal.close call above, therefore we shouldn't be able
+      // to materialize the iterator with parallel recovery
+      intercept[RejectedExecutionException](readData.toArray)
+    } else {
+      assert(readData.toSeq === writtenData)
+    }
+  }
 }
 
 class FileBasedWriteAheadLogSuite
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala
index 9152728191ea..bfc5b0cf60fb 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogUtilsSuite.scala
@@ -56,19 +56,19 @@ class WriteAheadLogUtilsSuite extends SparkFunSuite {
   test("log selection and creation") {
 
     val emptyConf = new SparkConf()  // no log configuration
-    assertDriverLogClass[FileBasedWriteAheadLog](emptyConf)
+    assertDriverLogClass[FileBasedWriteAheadLog](emptyConf, isBatched = true)
     assertReceiverLogClass[FileBasedWriteAheadLog](emptyConf)
 
     // Verify setting driver WAL class
     val driverWALConf = new SparkConf().set("spark.streaming.driver.writeAheadLog.class",
       classOf[MockWriteAheadLog0].getName())
-    assertDriverLogClass[MockWriteAheadLog0](driverWALConf)
+    assertDriverLogClass[MockWriteAheadLog0](driverWALConf, isBatched = true)
     assertReceiverLogClass[FileBasedWriteAheadLog](driverWALConf)
 
     // Verify setting receiver WAL class
     val receiverWALConf = new SparkConf().set("spark.streaming.receiver.writeAheadLog.class",
       classOf[MockWriteAheadLog0].getName())
-    assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf)
+    assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf, isBatched = true)
     assertReceiverLogClass[MockWriteAheadLog0](receiverWALConf)
 
     // Verify setting receiver WAL class with 1-arg constructor
@@ -104,6 +104,19 @@ class WriteAheadLogUtilsSuite extends SparkFunSuite {
     assertDriverLogClass[FileBasedWriteAheadLog](receiverWALConf, isBatched = true)
     assertReceiverLogClass[MockWriteAheadLog0](receiverWALConf)
   }
+
+  test("batching is enabled by default in WriteAheadLog") {
+    val conf = new SparkConf()
+    assert(WriteAheadLogUtils.isBatchingEnabled(conf, isDriver = true))
+    // batching is not valid for receiver WALs
+    assert(!WriteAheadLogUtils.isBatchingEnabled(conf, isDriver = false))
+  }
+
+  test("closeFileAfterWrite is disabled by default in WriteAheadLog") {
+    val conf = new SparkConf()
+    assert(!WriteAheadLogUtils.shouldCloseFileAfterWrite(conf, isDriver = true))
+    assert(!WriteAheadLogUtils.shouldCloseFileAfterWrite(conf, isDriver = false))
+  }
 }
 
 object WriteAheadLogUtilsSuite {

From ace0db47141ffd457c2091751038fc291f6d5a8b Mon Sep 17 00:00:00 2001
From: Daniel Jalova <djalova@us.ibm.com>
Date: Mon, 16 Nov 2015 11:29:27 -0800
Subject: [PATCH 700/896] [SPARK-6328][PYTHON] Python API for StreamingListener

Author: Daniel Jalova <djalova@us.ibm.com>

Closes #9186 from djalova/SPARK-6328.
---
 python/pyspark/streaming/__init__.py          |   3 +-
 python/pyspark/streaming/context.py           |   8 ++
 python/pyspark/streaming/listener.py          |  75 +++++++++++
 python/pyspark/streaming/tests.py             | 126 +++++++++++++++++-
 .../api/java/JavaStreamingListener.scala      |  76 +++++++++++
 5 files changed, 286 insertions(+), 2 deletions(-)
 create mode 100644 python/pyspark/streaming/listener.py

diff --git a/python/pyspark/streaming/__init__.py b/python/pyspark/streaming/__init__.py
index d2644a1d4ffa..66e8f8ef001e 100644
--- a/python/pyspark/streaming/__init__.py
+++ b/python/pyspark/streaming/__init__.py
@@ -17,5 +17,6 @@
 
 from pyspark.streaming.context import StreamingContext
 from pyspark.streaming.dstream import DStream
+from pyspark.streaming.listener import StreamingListener
 
-__all__ = ['StreamingContext', 'DStream']
+__all__ = ['StreamingContext', 'DStream', 'StreamingListener']
diff --git a/python/pyspark/streaming/context.py b/python/pyspark/streaming/context.py
index 8be56c991526..1388b6d044e0 100644
--- a/python/pyspark/streaming/context.py
+++ b/python/pyspark/streaming/context.py
@@ -363,3 +363,11 @@ def union(self, *dstreams):
         first = dstreams[0]
         jrest = [d._jdstream for d in dstreams[1:]]
         return DStream(self._jssc.union(first._jdstream, jrest), self, first._jrdd_deserializer)
+
+    def addStreamingListener(self, streamingListener):
+        """
+        Add a [[org.apache.spark.streaming.scheduler.StreamingListener]] object for
+        receiving system events related to streaming.
+        """
+        self._jssc.addStreamingListener(self._jvm.JavaStreamingListenerWrapper(
+            self._jvm.PythonStreamingListenerWrapper(streamingListener)))
diff --git a/python/pyspark/streaming/listener.py b/python/pyspark/streaming/listener.py
new file mode 100644
index 000000000000..b830797f5c0a
--- /dev/null
+++ b/python/pyspark/streaming/listener.py
@@ -0,0 +1,75 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+__all__ = ["StreamingListener"]
+
+
+class StreamingListener(object):
+
+    def __init__(self):
+        pass
+
+    def onReceiverStarted(self, receiverStarted):
+        """
+        Called when a receiver has been started
+        """
+        pass
+
+    def onReceiverError(self, receiverError):
+        """
+        Called when a receiver has reported an error
+        """
+        pass
+
+    def onReceiverStopped(self, receiverStopped):
+        """
+        Called when a receiver has been stopped
+        """
+        pass
+
+    def onBatchSubmitted(self, batchSubmitted):
+        """
+        Called when a batch of jobs has been submitted for processing.
+        """
+        pass
+
+    def onBatchStarted(self, batchStarted):
+        """
+        Called when processing of a batch of jobs has started.
+        """
+        pass
+
+    def onBatchCompleted(self, batchCompleted):
+        """
+        Called when processing of a batch of jobs has completed.
+        """
+        pass
+
+    def onOutputOperationStarted(self, outputOperationStarted):
+        """
+        Called when processing of a job of a batch has started.
+        """
+        pass
+
+    def onOutputOperationCompleted(self, outputOperationCompleted):
+        """
+        Called when processing of a job of a batch has completed
+        """
+        pass
+
+    class Java:
+        implements = ["org.apache.spark.streaming.api.java.PythonStreamingListener"]
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 6ee864d8d3da..2983028413bb 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -48,6 +48,7 @@
 from pyspark.streaming.flume import FlumeUtils
 from pyspark.streaming.mqtt import MQTTUtils
 from pyspark.streaming.kinesis import KinesisUtils, InitialPositionInStream
+from pyspark.streaming.listener import StreamingListener
 
 
 class PySparkStreamingTestCase(unittest.TestCase):
@@ -403,6 +404,128 @@ def func(dstream):
         self._test_func(input, func, expected)
 
 
+class StreamingListenerTests(PySparkStreamingTestCase):
+
+    duration = .5
+
+    class BatchInfoCollector(StreamingListener):
+
+        def __init__(self):
+            super(StreamingListener, self).__init__()
+            self.batchInfosCompleted = []
+            self.batchInfosStarted = []
+            self.batchInfosSubmitted = []
+
+        def onBatchSubmitted(self, batchSubmitted):
+            self.batchInfosSubmitted.append(batchSubmitted.batchInfo())
+
+        def onBatchStarted(self, batchStarted):
+            self.batchInfosStarted.append(batchStarted.batchInfo())
+
+        def onBatchCompleted(self, batchCompleted):
+            self.batchInfosCompleted.append(batchCompleted.batchInfo())
+
+    def test_batch_info_reports(self):
+        batch_collector = self.BatchInfoCollector()
+        self.ssc.addStreamingListener(batch_collector)
+        input = [[1], [2], [3], [4]]
+
+        def func(dstream):
+            return dstream.map(int)
+        expected = [[1], [2], [3], [4]]
+        self._test_func(input, func, expected)
+
+        batchInfosSubmitted = batch_collector.batchInfosSubmitted
+        batchInfosStarted = batch_collector.batchInfosStarted
+        batchInfosCompleted = batch_collector.batchInfosCompleted
+
+        self.wait_for(batchInfosCompleted, 4)
+
+        self.assertGreaterEqual(len(batchInfosSubmitted), 4)
+        for info in batchInfosSubmitted:
+            self.assertGreaterEqual(info.batchTime().milliseconds(), 0)
+            self.assertGreaterEqual(info.submissionTime(), 0)
+
+            for streamId in info.streamIdToInputInfo():
+                streamInputInfo = info.streamIdToInputInfo()[streamId]
+                self.assertGreaterEqual(streamInputInfo.inputStreamId(), 0)
+                self.assertGreaterEqual(streamInputInfo.numRecords, 0)
+                for key in streamInputInfo.metadata():
+                    self.assertIsNotNone(streamInputInfo.metadata()[key])
+                self.assertIsNotNone(streamInputInfo.metadataDescription())
+
+            for outputOpId in info.outputOperationInfos():
+                outputInfo = info.outputOperationInfos()[outputOpId]
+                self.assertGreaterEqual(outputInfo.batchTime().milliseconds(), 0)
+                self.assertGreaterEqual(outputInfo.id(), 0)
+                self.assertIsNotNone(outputInfo.name())
+                self.assertIsNotNone(outputInfo.description())
+                self.assertGreaterEqual(outputInfo.startTime(), -1)
+                self.assertGreaterEqual(outputInfo.endTime(), -1)
+                self.assertIsNone(outputInfo.failureReason())
+
+            self.assertEqual(info.schedulingDelay(), -1)
+            self.assertEqual(info.processingDelay(), -1)
+            self.assertEqual(info.totalDelay(), -1)
+            self.assertEqual(info.numRecords(), 0)
+
+        self.assertGreaterEqual(len(batchInfosStarted), 4)
+        for info in batchInfosStarted:
+            self.assertGreaterEqual(info.batchTime().milliseconds(), 0)
+            self.assertGreaterEqual(info.submissionTime(), 0)
+
+            for streamId in info.streamIdToInputInfo():
+                streamInputInfo = info.streamIdToInputInfo()[streamId]
+                self.assertGreaterEqual(streamInputInfo.inputStreamId(), 0)
+                self.assertGreaterEqual(streamInputInfo.numRecords, 0)
+                for key in streamInputInfo.metadata():
+                    self.assertIsNotNone(streamInputInfo.metadata()[key])
+                self.assertIsNotNone(streamInputInfo.metadataDescription())
+
+            for outputOpId in info.outputOperationInfos():
+                outputInfo = info.outputOperationInfos()[outputOpId]
+                self.assertGreaterEqual(outputInfo.batchTime().milliseconds(), 0)
+                self.assertGreaterEqual(outputInfo.id(), 0)
+                self.assertIsNotNone(outputInfo.name())
+                self.assertIsNotNone(outputInfo.description())
+                self.assertGreaterEqual(outputInfo.startTime(), -1)
+                self.assertGreaterEqual(outputInfo.endTime(), -1)
+                self.assertIsNone(outputInfo.failureReason())
+
+            self.assertGreaterEqual(info.schedulingDelay(), 0)
+            self.assertEqual(info.processingDelay(), -1)
+            self.assertEqual(info.totalDelay(), -1)
+            self.assertEqual(info.numRecords(), 0)
+
+        self.assertGreaterEqual(len(batchInfosCompleted), 4)
+        for info in batchInfosCompleted:
+            self.assertGreaterEqual(info.batchTime().milliseconds(), 0)
+            self.assertGreaterEqual(info.submissionTime(), 0)
+
+            for streamId in info.streamIdToInputInfo():
+                streamInputInfo = info.streamIdToInputInfo()[streamId]
+                self.assertGreaterEqual(streamInputInfo.inputStreamId(), 0)
+                self.assertGreaterEqual(streamInputInfo.numRecords, 0)
+                for key in streamInputInfo.metadata():
+                    self.assertIsNotNone(streamInputInfo.metadata()[key])
+                self.assertIsNotNone(streamInputInfo.metadataDescription())
+
+            for outputOpId in info.outputOperationInfos():
+                outputInfo = info.outputOperationInfos()[outputOpId]
+                self.assertGreaterEqual(outputInfo.batchTime().milliseconds(), 0)
+                self.assertGreaterEqual(outputInfo.id(), 0)
+                self.assertIsNotNone(outputInfo.name())
+                self.assertIsNotNone(outputInfo.description())
+                self.assertGreaterEqual(outputInfo.startTime(), 0)
+                self.assertGreaterEqual(outputInfo.endTime(), 0)
+                self.assertIsNone(outputInfo.failureReason())
+
+            self.assertGreaterEqual(info.schedulingDelay(), 0)
+            self.assertGreaterEqual(info.processingDelay(), 0)
+            self.assertGreaterEqual(info.totalDelay(), 0)
+            self.assertEqual(info.numRecords(), 0)
+
+
 class WindowFunctionTests(PySparkStreamingTestCase):
 
     timeout = 15
@@ -1308,7 +1431,8 @@ def search_kinesis_asl_assembly_jar():
 
     os.environ["PYSPARK_SUBMIT_ARGS"] = "--jars %s pyspark-shell" % jars
     testcases = [BasicOperationTests, WindowFunctionTests, StreamingContextTests, CheckpointTests,
-                 KafkaStreamTests, FlumeStreamTests, FlumePollingStreamTests, MQTTStreamTests]
+                 KafkaStreamTests, FlumeStreamTests, FlumePollingStreamTests, MQTTStreamTests,
+                 StreamingListenerTests]
 
     if kinesis_jar_present is True:
         testcases.append(KinesisStreamTests)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
index 34429074fe80..7bfd6bd5af75 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaStreamingListener.scala
@@ -18,6 +18,82 @@
 package org.apache.spark.streaming.api.java
 
 import org.apache.spark.streaming.Time
+import org.apache.spark.streaming.scheduler.StreamingListener
+
+private[streaming] trait PythonStreamingListener{
+
+  /** Called when a receiver has been started */
+  def onReceiverStarted(receiverStarted: JavaStreamingListenerReceiverStarted) { }
+
+  /** Called when a receiver has reported an error */
+  def onReceiverError(receiverError: JavaStreamingListenerReceiverError) { }
+
+  /** Called when a receiver has been stopped */
+  def onReceiverStopped(receiverStopped: JavaStreamingListenerReceiverStopped) { }
+
+  /** Called when a batch of jobs has been submitted for processing. */
+  def onBatchSubmitted(batchSubmitted: JavaStreamingListenerBatchSubmitted) { }
+
+  /** Called when processing of a batch of jobs has started.  */
+  def onBatchStarted(batchStarted: JavaStreamingListenerBatchStarted) { }
+
+  /** Called when processing of a batch of jobs has completed. */
+  def onBatchCompleted(batchCompleted: JavaStreamingListenerBatchCompleted) { }
+
+  /** Called when processing of a job of a batch has started. */
+  def onOutputOperationStarted(
+      outputOperationStarted: JavaStreamingListenerOutputOperationStarted) { }
+
+  /** Called when processing of a job of a batch has completed. */
+  def onOutputOperationCompleted(
+      outputOperationCompleted: JavaStreamingListenerOutputOperationCompleted) { }
+}
+
+private[streaming] class PythonStreamingListenerWrapper(listener: PythonStreamingListener)
+  extends JavaStreamingListener {
+
+  /** Called when a receiver has been started */
+  override def onReceiverStarted(receiverStarted: JavaStreamingListenerReceiverStarted): Unit = {
+    listener.onReceiverStarted(receiverStarted)
+  }
+
+  /** Called when a receiver has reported an error */
+  override def onReceiverError(receiverError: JavaStreamingListenerReceiverError): Unit = {
+    listener.onReceiverError(receiverError)
+  }
+
+  /** Called when a receiver has been stopped */
+  override def onReceiverStopped(receiverStopped: JavaStreamingListenerReceiverStopped): Unit = {
+    listener.onReceiverStopped(receiverStopped)
+  }
+
+  /** Called when a batch of jobs has been submitted for processing. */
+  override def onBatchSubmitted(batchSubmitted: JavaStreamingListenerBatchSubmitted): Unit = {
+    listener.onBatchSubmitted(batchSubmitted)
+  }
+
+  /** Called when processing of a batch of jobs has started.  */
+  override def onBatchStarted(batchStarted: JavaStreamingListenerBatchStarted): Unit = {
+    listener.onBatchStarted(batchStarted)
+  }
+
+  /** Called when processing of a batch of jobs has completed. */
+  override def onBatchCompleted(batchCompleted: JavaStreamingListenerBatchCompleted): Unit = {
+    listener.onBatchCompleted(batchCompleted)
+  }
+
+  /** Called when processing of a job of a batch has started. */
+  override def onOutputOperationStarted(
+    outputOperationStarted: JavaStreamingListenerOutputOperationStarted): Unit = {
+      listener.onOutputOperationStarted(outputOperationStarted)
+  }
+
+  /** Called when processing of a job of a batch has completed. */
+  override def onOutputOperationCompleted(
+    outputOperationCompleted: JavaStreamingListenerOutputOperationCompleted): Unit = {
+      listener.onOutputOperationCompleted(outputOperationCompleted)
+  }
+}
 
 /**
  * A listener interface for receiving information about an ongoing streaming  computation.

From 24477d2705bcf2a851acc241deb8376c5450dc73 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 16 Nov 2015 11:43:18 -0800
Subject: [PATCH 701/896] [SPARK-11718][YARN][CORE] Fix explicitly killed
 executor dies silently issue

Currently if dynamic allocation is enabled, explicitly killing executor will not get response, so the executor metadata is wrong in driver side. Which will make dynamic allocation on Yarn fail to work.

The problem is  `disableExecutor` returns false for pending killing executors when `onDisconnect` is detected, so no further implementation is done.

One solution is to bypass these explicitly killed executors to use `super.onDisconnect` to remove executor. This is simple.

Another solution is still querying the loss reason for these explicitly kill executors. Since executor may get killed and informed in the same AM-RM communication, so current way of adding pending loss reason request is not worked (container complete is already processed), here we should store this loss reason for later query.

Here this PR chooses solution 2.

Please help to review. vanzin I think this part is changed by you previously, would you please help to review? Thanks a lot.

Author: jerryshao <sshao@hortonworks.com>

Closes #9684 from jerryshao/SPARK-11718.
---
 .../spark/scheduler/TaskSchedulerImpl.scala   |  1 +
 .../CoarseGrainedSchedulerBackend.scala       |  6 ++--
 .../spark/deploy/yarn/YarnAllocator.scala     | 30 +++++++++++++++----
 3 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
index 43d7d80b7aae..5f136690f456 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
@@ -473,6 +473,7 @@ private[spark] class TaskSchedulerImpl(
              // If the host mapping still exists, it means we don't know the loss reason for the
              // executor. So call removeExecutor() to update tasks running on that executor when
              // the real loss reason is finally known.
+             logError(s"Actual reason for lost executor $executorId: ${reason.message}")
              removeExecutor(executorId, reason)
 
            case None =>
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index f71d98feac05..3373caf0d15e 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -269,7 +269,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
      * Stop making resource offers for the given executor. The executor is marked as lost with
      * the loss reason still pending.
      *
-     * @return Whether executor was alive.
+     * @return Whether executor should be disabled
      */
     protected def disableExecutor(executorId: String): Boolean = {
       val shouldDisable = CoarseGrainedSchedulerBackend.this.synchronized {
@@ -277,7 +277,9 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
           executorsPendingLossReason += executorId
           true
         } else {
-          false
+          // Returns true for explicitly killed executors, we also need to get pending loss reasons;
+          // For others return false.
+          executorsPendingToRemove.contains(executorId)
         }
       }
 
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index 4d9e777cb413..7e39c3ea56af 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -35,7 +35,7 @@ import org.apache.hadoop.yarn.util.RackResolver
 
 import org.apache.log4j.{Level, Logger}
 
-import org.apache.spark.{Logging, SecurityManager, SparkConf}
+import org.apache.spark.{Logging, SecurityManager, SparkConf, SparkException}
 import org.apache.spark.deploy.yarn.YarnSparkHadoopUtil._
 import org.apache.spark.rpc.{RpcCallContext, RpcEndpointRef}
 import org.apache.spark.scheduler.{ExecutorExited, ExecutorLossReason}
@@ -96,6 +96,10 @@ private[yarn] class YarnAllocator(
   // was lost.
   private val pendingLossReasonRequests = new HashMap[String, mutable.Buffer[RpcCallContext]]
 
+  // Maintain loss reasons for already released executors, it will be added when executor loss
+  // reason is got from AM-RM call, and be removed after querying this loss reason.
+  private val releasedExecutorLossReasons = new HashMap[String, ExecutorLossReason]
+
   // Keep track of which container is running which executor to remove the executors later
   // Visible for testing.
   private[yarn] val executorIdToContainer = new HashMap[String, Container]
@@ -202,8 +206,7 @@ private[yarn] class YarnAllocator(
    */
   def killExecutor(executorId: String): Unit = synchronized {
     if (executorIdToContainer.contains(executorId)) {
-      val container = executorIdToContainer.remove(executorId).get
-      containerIdToExecutorId.remove(container.getId)
+      val container = executorIdToContainer.get(executorId).get
       internalReleaseContainer(container)
       numExecutorsRunning -= 1
     } else {
@@ -514,9 +517,18 @@ private[yarn] class YarnAllocator(
 
       containerIdToExecutorId.remove(containerId).foreach { eid =>
         executorIdToContainer.remove(eid)
-        pendingLossReasonRequests.remove(eid).foreach { pendingRequests =>
-          // Notify application of executor loss reasons so it can decide whether it should abort
-          pendingRequests.foreach(_.reply(exitReason))
+        pendingLossReasonRequests.remove(eid) match {
+          case Some(pendingRequests) =>
+            // Notify application of executor loss reasons so it can decide whether it should abort
+            pendingRequests.foreach(_.reply(exitReason))
+
+          case None =>
+            // We cannot find executor for pending reasons. This is because completed container
+            // is processed before querying pending result. We should store it for later query.
+            // This is usually happened when explicitly killing a container, the result will be
+            // returned in one AM-RM communication. So query RPC will be later than this completed
+            // container process.
+            releasedExecutorLossReasons.put(eid, exitReason)
         }
         if (!alreadyReleased) {
           // The executor could have gone away (like no route to host, node failure, etc)
@@ -538,8 +550,14 @@ private[yarn] class YarnAllocator(
     if (executorIdToContainer.contains(eid)) {
       pendingLossReasonRequests
         .getOrElseUpdate(eid, new ArrayBuffer[RpcCallContext]) += context
+    } else if (releasedExecutorLossReasons.contains(eid)) {
+      // Executor is already released explicitly before getting the loss reason, so directly send
+      // the pre-stored lost reason
+      context.reply(releasedExecutorLossReasons.remove(eid).get)
     } else {
       logWarning(s"Tried to get the loss reason for non-existent executor $eid")
+      context.sendFailure(
+        new SparkException(s"Fail to find loss reason for non-existent executor $eid"))
     }
   }
 

From b1a9662623951079e80bd7498e064c4cae4977e9 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 16 Nov 2015 12:45:34 -0800
Subject: [PATCH 702/896] [SPARK-11754][SQL] consolidate
 `ExpressionEncoder.tuple` and `Encoders.tuple`

These 2 are very similar, we can consolidate them into one.

Also add tests for it and fix a bug.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9729 from cloud-fan/tuple.
---
 .../scala/org/apache/spark/sql/Encoder.scala  |  95 ++++------------
 .../catalyst/encoders/ExpressionEncoder.scala | 104 ++++++++++--------
 .../encoders/ProductEncoderSuite.scala        |  29 +++++
 3 files changed, 108 insertions(+), 120 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 5f619d6c339e..c8b017e25163 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -19,10 +19,8 @@ package org.apache.spark.sql
 
 import scala.reflect.ClassTag
 
-import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.types.{ObjectType, StructField, StructType}
-import org.apache.spark.util.Utils
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
+import org.apache.spark.sql.types.StructType
 
 /**
  * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
@@ -49,83 +47,34 @@ object Encoders {
   def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
   def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
 
-  def tuple[T1, T2](enc1: Encoder[T1], enc2: Encoder[T2]): Encoder[(T1, T2)] = {
-    tuple(Seq(enc1, enc2).map(_.asInstanceOf[ExpressionEncoder[_]]))
-      .asInstanceOf[ExpressionEncoder[(T1, T2)]]
+  def tuple[T1, T2](
+      e1: Encoder[T1],
+      e2: Encoder[T2]): Encoder[(T1, T2)] = {
+    ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2))
   }
 
   def tuple[T1, T2, T3](
-      enc1: Encoder[T1],
-      enc2: Encoder[T2],
-      enc3: Encoder[T3]): Encoder[(T1, T2, T3)] = {
-    tuple(Seq(enc1, enc2, enc3).map(_.asInstanceOf[ExpressionEncoder[_]]))
-      .asInstanceOf[ExpressionEncoder[(T1, T2, T3)]]
+      e1: Encoder[T1],
+      e2: Encoder[T2],
+      e3: Encoder[T3]): Encoder[(T1, T2, T3)] = {
+    ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2), encoderFor(e3))
   }
 
   def tuple[T1, T2, T3, T4](
-      enc1: Encoder[T1],
-      enc2: Encoder[T2],
-      enc3: Encoder[T3],
-      enc4: Encoder[T4]): Encoder[(T1, T2, T3, T4)] = {
-    tuple(Seq(enc1, enc2, enc3, enc4).map(_.asInstanceOf[ExpressionEncoder[_]]))
-      .asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4)]]
+      e1: Encoder[T1],
+      e2: Encoder[T2],
+      e3: Encoder[T3],
+      e4: Encoder[T4]): Encoder[(T1, T2, T3, T4)] = {
+    ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2), encoderFor(e3), encoderFor(e4))
   }
 
   def tuple[T1, T2, T3, T4, T5](
-      enc1: Encoder[T1],
-      enc2: Encoder[T2],
-      enc3: Encoder[T3],
-      enc4: Encoder[T4],
-      enc5: Encoder[T5]): Encoder[(T1, T2, T3, T4, T5)] = {
-    tuple(Seq(enc1, enc2, enc3, enc4, enc5).map(_.asInstanceOf[ExpressionEncoder[_]]))
-      .asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4, T5)]]
-  }
-
-  private def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
-    assert(encoders.length > 1)
-    // make sure all encoders are resolved, i.e. `Attribute` has been resolved to `BoundReference`.
-    assert(encoders.forall(_.fromRowExpression.find(_.isInstanceOf[Attribute]).isEmpty))
-
-    val schema = StructType(encoders.zipWithIndex.map {
-      case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
-    })
-
-    val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
-
-    val extractExpressions = encoders.map {
-      case e if e.flat => e.toRowExpressions.head
-      case other => CreateStruct(other.toRowExpressions)
-    }.zipWithIndex.map { case (expr, index) =>
-      expr.transformUp {
-        case BoundReference(0, t: ObjectType, _) =>
-          Invoke(
-            BoundReference(0, ObjectType(cls), nullable = true),
-            s"_${index + 1}",
-            t)
-      }
-    }
-
-    val constructExpressions = encoders.zipWithIndex.map { case (enc, index) =>
-      if (enc.flat) {
-        enc.fromRowExpression.transform {
-          case b: BoundReference => b.copy(ordinal = index)
-        }
-      } else {
-        enc.fromRowExpression.transformUp {
-          case BoundReference(ordinal, dt, _) =>
-            GetInternalRowField(BoundReference(index, enc.schema, nullable = true), ordinal, dt)
-        }
-      }
-    }
-
-    val constructExpression =
-      NewInstance(cls, constructExpressions, propagateNull = false, ObjectType(cls))
-
-    new ExpressionEncoder[Any](
-      schema,
-      flat = false,
-      extractExpressions,
-      constructExpression,
-      ClassTag(cls))
+      e1: Encoder[T1],
+      e2: Encoder[T2],
+      e3: Encoder[T3],
+      e4: Encoder[T4],
+      e5: Encoder[T5]): Encoder[(T1, T2, T3, T4, T5)] = {
+    ExpressionEncoder.tuple(
+      encoderFor(e1), encoderFor(e2), encoderFor(e3), encoderFor(e4), encoderFor(e5))
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 0d3e4aafb0af..9a1a8f5cbbdc 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -67,47 +67,77 @@ object ExpressionEncoder {
   def tuple(encoders: Seq[ExpressionEncoder[_]]): ExpressionEncoder[_] = {
     encoders.foreach(_.assertUnresolved())
 
-    val schema =
-      StructType(
-        encoders.zipWithIndex.map {
-          case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
-        })
+    val schema = StructType(encoders.zipWithIndex.map {
+      case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
+    })
+
     val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
 
-    // Rebind the encoders to the nested schema.
-    val newConstructExpressions = encoders.zipWithIndex.map {
-      case (e, i) if !e.flat => e.nested(i).fromRowExpression
-      case (e, i) => e.shift(i).fromRowExpression
+    val toRowExpressions = encoders.map {
+      case e if e.flat => e.toRowExpressions.head
+      case other => CreateStruct(other.toRowExpressions)
+    }.zipWithIndex.map { case (expr, index) =>
+      expr.transformUp {
+        case BoundReference(0, t, _) =>
+          Invoke(
+            BoundReference(0, ObjectType(cls), nullable = true),
+            s"_${index + 1}",
+            t)
+      }
     }
 
-    val constructExpression =
-      NewInstance(cls, newConstructExpressions, false, ObjectType(cls))
-
-    val input = BoundReference(0, ObjectType(cls), false)
-    val extractExpressions = encoders.zipWithIndex.map {
-      case (e, i) if !e.flat => CreateStruct(e.toRowExpressions.map(_ transformUp {
-        case b: BoundReference =>
-          Invoke(input, s"_${i + 1}", b.dataType, Nil)
-      }))
-      case (e, i) => e.toRowExpressions.head transformUp {
-        case b: BoundReference =>
-          Invoke(input, s"_${i + 1}", b.dataType, Nil)
+    val fromRowExpressions = encoders.zipWithIndex.map { case (enc, index) =>
+      if (enc.flat) {
+        enc.fromRowExpression.transform {
+          case b: BoundReference => b.copy(ordinal = index)
+        }
+      } else {
+        val input = BoundReference(index, enc.schema, nullable = true)
+        enc.fromRowExpression.transformUp {
+          case UnresolvedAttribute(nameParts) =>
+            assert(nameParts.length == 1)
+            UnresolvedExtractValue(input, Literal(nameParts.head))
+          case BoundReference(ordinal, dt, _) => GetInternalRowField(input, ordinal, dt)
+        }
       }
     }
 
+    val fromRowExpression =
+      NewInstance(cls, fromRowExpressions, propagateNull = false, ObjectType(cls))
+
     new ExpressionEncoder[Any](
       schema,
-      false,
-      extractExpressions,
-      constructExpression,
-      ClassTag.apply(cls))
+      flat = false,
+      toRowExpressions,
+      fromRowExpression,
+      ClassTag(cls))
   }
 
-  /** A helper for producing encoders of Tuple2 from other encoders. */
   def tuple[T1, T2](
       e1: ExpressionEncoder[T1],
       e2: ExpressionEncoder[T2]): ExpressionEncoder[(T1, T2)] =
-    tuple(e1 :: e2 :: Nil).asInstanceOf[ExpressionEncoder[(T1, T2)]]
+    tuple(Seq(e1, e2)).asInstanceOf[ExpressionEncoder[(T1, T2)]]
+
+  def tuple[T1, T2, T3](
+      e1: ExpressionEncoder[T1],
+      e2: ExpressionEncoder[T2],
+      e3: ExpressionEncoder[T3]): ExpressionEncoder[(T1, T2, T3)] =
+    tuple(Seq(e1, e2, e3)).asInstanceOf[ExpressionEncoder[(T1, T2, T3)]]
+
+  def tuple[T1, T2, T3, T4](
+      e1: ExpressionEncoder[T1],
+      e2: ExpressionEncoder[T2],
+      e3: ExpressionEncoder[T3],
+      e4: ExpressionEncoder[T4]): ExpressionEncoder[(T1, T2, T3, T4)] =
+    tuple(Seq(e1, e2, e3, e4)).asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4)]]
+
+  def tuple[T1, T2, T3, T4, T5](
+      e1: ExpressionEncoder[T1],
+      e2: ExpressionEncoder[T2],
+      e3: ExpressionEncoder[T3],
+      e4: ExpressionEncoder[T4],
+      e5: ExpressionEncoder[T5]): ExpressionEncoder[(T1, T2, T3, T4, T5)] =
+    tuple(Seq(e1, e2, e3, e4, e5)).asInstanceOf[ExpressionEncoder[(T1, T2, T3, T4, T5)]]
 }
 
 /**
@@ -208,26 +238,6 @@ case class ExpressionEncoder[T](
     })
   }
 
-  /**
-   * Returns a copy of this encoder where the expressions used to create an object given an
-   * input row have been modified to pull the object out from a nested struct, instead of the
-   * top level fields.
-   */
-  private def nested(i: Int): ExpressionEncoder[T] = {
-    // We don't always know our input type at this point since it might be unresolved.
-    // We fill in null and it will get unbound to the actual attribute at this position.
-    val input = BoundReference(i, NullType, nullable = true)
-    copy(fromRowExpression = fromRowExpression transformUp {
-      case u: Attribute =>
-        UnresolvedExtractValue(input, Literal(u.name))
-      case b: BoundReference =>
-        GetStructField(
-          input,
-          StructField(s"i[${b.ordinal}]", b.dataType),
-          b.ordinal)
-    })
-  }
-
   protected val attrs = toRowExpressions.flatMap(_.collect {
     case _: UnresolvedAttribute => ""
     case a: Attribute => s"#${a.exprId}"
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
index fda978e7055e..bc539d62c537 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -117,6 +117,35 @@ class ProductEncoderSuite extends ExpressionEncoderSuite {
   productTest(("Seq[Seq[(Int, Int)]]",
     Seq(Seq((1, 2)))))
 
+  encodeDecodeTest(
+    1 -> 10L,
+    ExpressionEncoder.tuple(FlatEncoder[Int], FlatEncoder[Long]),
+    "tuple with 2 flat encoders")
+
+  encodeDecodeTest(
+    (PrimitiveData(1, 1, 1, 1, 1, 1, true), (3, 30L)),
+    ExpressionEncoder.tuple(ProductEncoder[PrimitiveData], ProductEncoder[(Int, Long)]),
+    "tuple with 2 product encoders")
+
+  encodeDecodeTest(
+    (PrimitiveData(1, 1, 1, 1, 1, 1, true), 3),
+    ExpressionEncoder.tuple(ProductEncoder[PrimitiveData], FlatEncoder[Int]),
+    "tuple with flat encoder and product encoder")
+
+  encodeDecodeTest(
+    (3, PrimitiveData(1, 1, 1, 1, 1, 1, true)),
+    ExpressionEncoder.tuple(FlatEncoder[Int], ProductEncoder[PrimitiveData]),
+    "tuple with product encoder and flat encoder")
+
+  encodeDecodeTest(
+    (1, (10, 100L)),
+    {
+      val intEnc = FlatEncoder[Int]
+      val longEnc = FlatEncoder[Long]
+      ExpressionEncoder.tuple(intEnc, ExpressionEncoder.tuple(intEnc, longEnc))
+    },
+    "nested tuple encoder")
+
   private def productTest[T <: Product : TypeTag](input: T): Unit = {
     encodeDecodeTest(input, ProductEncoder[T], input.getClass.getSimpleName)
   }

From 985b38dd2fa5d8f1e23f1c420ce6262e7e3ed181 Mon Sep 17 00:00:00 2001
From: Zee Chen <zeechen@us.ibm.com>
Date: Mon, 16 Nov 2015 14:21:28 -0800
Subject: [PATCH 703/896] [SPARK-11390][SQL] Query plan with/without
 filterPushdown indistinguishable
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…ishable

Propagate pushed filters to PhyicalRDD in DataSourceStrategy.apply

Author: Zee Chen <zeechen@us.ibm.com>

Closes #9679 from zeocio/spark-11390.
---
 .../apache/spark/sql/execution/ExistingRDD.scala   |  6 ++++--
 .../execution/datasources/DataSourceStrategy.scala |  6 ++++--
 .../apache/spark/sql/execution/PlannerSuite.scala  | 14 ++++++++++++++
 3 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
index 8b41d3d3d892..62620ec642c7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
@@ -106,7 +106,9 @@ private[sql] object PhysicalRDD {
   def createFromDataSource(
       output: Seq[Attribute],
       rdd: RDD[InternalRow],
-      relation: BaseRelation): PhysicalRDD = {
-    PhysicalRDD(output, rdd, relation.toString, relation.isInstanceOf[HadoopFsRelation])
+      relation: BaseRelation,
+      extraInformation: String = ""): PhysicalRDD = {
+    PhysicalRDD(output, rdd, relation.toString + extraInformation,
+      relation.isInstanceOf[HadoopFsRelation])
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
index 9bbbfa7c77cb..544d5eccec03 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/DataSourceStrategy.scala
@@ -315,6 +315,8 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
     // `Filter`s or cannot be handled by `relation`.
     val filterCondition = unhandledPredicates.reduceLeftOption(expressions.And)
 
+    val pushedFiltersString = pushedFilters.mkString(" PushedFilter: [", ",", "] ")
+
     if (projects.map(_.toAttribute) == projects &&
         projectSet.size == projects.size &&
         filterSet.subsetOf(projectSet)) {
@@ -332,7 +334,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
       val scan = execution.PhysicalRDD.createFromDataSource(
         projects.map(_.toAttribute),
         scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
-        relation.relation)
+        relation.relation, pushedFiltersString)
       filterCondition.map(execution.Filter(_, scan)).getOrElse(scan)
     } else {
       // Don't request columns that are only referenced by pushed filters.
@@ -342,7 +344,7 @@ private[sql] object DataSourceStrategy extends Strategy with Logging {
       val scan = execution.PhysicalRDD.createFromDataSource(
         requestedColumns,
         scanBuilder(requestedColumns, candidatePredicates, pushedFilters),
-        relation.relation)
+        relation.relation, pushedFiltersString)
       execution.Project(
         projects, filterCondition.map(execution.Filter(_, scan)).getOrElse(scan))
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
index be53ec3e271c..dfec139985f7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala
@@ -160,6 +160,20 @@ class PlannerSuite extends SharedSQLContext {
     }
   }
 
+  test("SPARK-11390 explain should print PushedFilters of PhysicalRDD") {
+    withTempPath { file =>
+      val path = file.getCanonicalPath
+      testData.write.parquet(path)
+      val df = sqlContext.read.parquet(path)
+      sqlContext.registerDataFrameAsTable(df, "testPushed")
+
+      withTempTable("testPushed") {
+        val exp = sql("select * from testPushed where key = 15").queryExecution.executedPlan
+        assert(exp.toString.contains("PushedFilter: [EqualTo(key,15)]"))
+      }
+    }
+  }
+
   test("efficient limit -> project -> sort") {
     {
       val query =

From 3c025087b58f475a9bcb5c8f4b2b2df804915b2b Mon Sep 17 00:00:00 2001
From: Davies Liu <davies.liu@gmail.com>
Date: Mon, 16 Nov 2015 14:50:38 -0800
Subject: [PATCH 704/896] Revert "[SPARK-11271][SPARK-11016][CORE] Use Spark
 BitSet instead of RoaringBitmap to reduce memory usage"

This reverts commit e209fa271ae57dc8849f8b1241bf1ea7d6d3d62c.
---
 core/pom.xml                                  |  4 ++
 .../apache/spark/scheduler/MapStatus.scala    | 13 ++---
 .../spark/serializer/KryoSerializer.scala     | 10 +++-
 .../apache/spark/util/collection/BitSet.scala | 28 ++---------
 .../serializer/KryoSerializerSuite.scala      |  6 +++
 .../spark/util/collection/BitSetSuite.scala   | 49 -------------------
 pom.xml                                       |  5 ++
 7 files changed, 33 insertions(+), 82 deletions(-)

diff --git a/core/pom.xml b/core/pom.xml
index 7e1205a076f2..37e3f168ab37 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -177,6 +177,10 @@
       <groupId>net.jpountz.lz4</groupId>
       <artifactId>lz4</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.roaringbitmap</groupId>
+      <artifactId>RoaringBitmap</artifactId>
+    </dependency>
     <dependency>
       <groupId>commons-net</groupId>
       <artifactId>commons-net</artifactId>
diff --git a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
index 180c8d1827e1..1efce124c0a6 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
@@ -19,8 +19,9 @@ package org.apache.spark.scheduler
 
 import java.io.{Externalizable, ObjectInput, ObjectOutput}
 
+import org.roaringbitmap.RoaringBitmap
+
 import org.apache.spark.storage.BlockManagerId
-import org.apache.spark.util.collection.BitSet
 import org.apache.spark.util.Utils
 
 /**
@@ -132,7 +133,7 @@ private[spark] class CompressedMapStatus(
 private[spark] class HighlyCompressedMapStatus private (
     private[this] var loc: BlockManagerId,
     private[this] var numNonEmptyBlocks: Int,
-    private[this] var emptyBlocks: BitSet,
+    private[this] var emptyBlocks: RoaringBitmap,
     private[this] var avgSize: Long)
   extends MapStatus with Externalizable {
 
@@ -145,7 +146,7 @@ private[spark] class HighlyCompressedMapStatus private (
   override def location: BlockManagerId = loc
 
   override def getSizeForBlock(reduceId: Int): Long = {
-    if (emptyBlocks.get(reduceId)) {
+    if (emptyBlocks.contains(reduceId)) {
       0
     } else {
       avgSize
@@ -160,7 +161,7 @@ private[spark] class HighlyCompressedMapStatus private (
 
   override def readExternal(in: ObjectInput): Unit = Utils.tryOrIOException {
     loc = BlockManagerId(in)
-    emptyBlocks = new BitSet
+    emptyBlocks = new RoaringBitmap()
     emptyBlocks.readExternal(in)
     avgSize = in.readLong()
   }
@@ -176,15 +177,15 @@ private[spark] object HighlyCompressedMapStatus {
     // From a compression standpoint, it shouldn't matter whether we track empty or non-empty
     // blocks. From a performance standpoint, we benefit from tracking empty blocks because
     // we expect that there will be far fewer of them, so we will perform fewer bitmap insertions.
+    val emptyBlocks = new RoaringBitmap()
     val totalNumBlocks = uncompressedSizes.length
-    val emptyBlocks = new BitSet(totalNumBlocks)
     while (i < totalNumBlocks) {
       var size = uncompressedSizes(i)
       if (size > 0) {
         numNonEmptyBlocks += 1
         totalSize += size
       } else {
-        emptyBlocks.set(i)
+        emptyBlocks.add(i)
       }
       i += 1
     }
diff --git a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
index bc51d4f2820c..c5195c1143a8 100644
--- a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
+++ b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
@@ -30,6 +30,7 @@ import com.esotericsoftware.kryo.io.{Input => KryoInput, Output => KryoOutput}
 import com.esotericsoftware.kryo.serializers.{JavaSerializer => KryoJavaSerializer}
 import com.twitter.chill.{AllScalaRegistrar, EmptyScalaKryoInstantiator}
 import org.apache.avro.generic.{GenericData, GenericRecord}
+import org.roaringbitmap.{ArrayContainer, BitmapContainer, RoaringArray, RoaringBitmap}
 
 import org.apache.spark._
 import org.apache.spark.api.python.PythonBroadcast
@@ -38,7 +39,7 @@ import org.apache.spark.network.util.ByteUnit
 import org.apache.spark.scheduler.{CompressedMapStatus, HighlyCompressedMapStatus}
 import org.apache.spark.storage._
 import org.apache.spark.util.{Utils, BoundedPriorityQueue, SerializableConfiguration, SerializableJobConf}
-import org.apache.spark.util.collection.{BitSet, CompactBuffer}
+import org.apache.spark.util.collection.CompactBuffer
 
 /**
  * A Spark serializer that uses the [[https://code.google.com/p/kryo/ Kryo serialization library]].
@@ -362,7 +363,12 @@ private[serializer] object KryoSerializer {
     classOf[StorageLevel],
     classOf[CompressedMapStatus],
     classOf[HighlyCompressedMapStatus],
-    classOf[BitSet],
+    classOf[RoaringBitmap],
+    classOf[RoaringArray],
+    classOf[RoaringArray.Element],
+    classOf[Array[RoaringArray.Element]],
+    classOf[ArrayContainer],
+    classOf[BitmapContainer],
     classOf[CompactBuffer[_]],
     classOf[BlockManagerId],
     classOf[Array[Byte]],
diff --git a/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala b/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
index 85c5bdbfcebc..7ab67fc3a2de 100644
--- a/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
+++ b/core/src/main/scala/org/apache/spark/util/collection/BitSet.scala
@@ -17,21 +17,14 @@
 
 package org.apache.spark.util.collection
 
-import java.io.{Externalizable, ObjectInput, ObjectOutput}
-
-import org.apache.spark.util.{Utils => UUtils}
-
-
 /**
  * A simple, fixed-size bit set implementation. This implementation is fast because it avoids
  * safety/bound checking.
  */
-class BitSet(private[this] var numBits: Int) extends Externalizable {
+class BitSet(numBits: Int) extends Serializable {
 
-  private var words = new Array[Long](bit2words(numBits))
-  private def numWords = words.length
-
-  def this() = this(0)
+  private val words = new Array[Long](bit2words(numBits))
+  private val numWords = words.length
 
   /**
    * Compute the capacity (number of bits) that can be represented
@@ -237,19 +230,4 @@ class BitSet(private[this] var numBits: Int) extends Externalizable {
 
   /** Return the number of longs it would take to hold numBits. */
   private def bit2words(numBits: Int) = ((numBits - 1) >> 6) + 1
-
-  override def writeExternal(out: ObjectOutput): Unit = UUtils.tryOrIOException {
-    out.writeInt(numBits)
-    words.foreach(out.writeLong(_))
-  }
-
-  override def readExternal(in: ObjectInput): Unit = UUtils.tryOrIOException {
-    numBits = in.readInt()
-    words = new Array[Long](bit2words(numBits))
-    var index = 0
-    while (index < words.length) {
-      words(index) = in.readLong()
-      index += 1
-    }
-  }
 }
diff --git a/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala b/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
index afe2e80358ca..e428414cf6e8 100644
--- a/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/serializer/KryoSerializerSuite.scala
@@ -322,6 +322,12 @@ class KryoSerializerSuite extends SparkFunSuite with SharedSparkContext {
     val conf = new SparkConf(false)
     conf.set("spark.kryo.registrationRequired", "true")
 
+    // these cases require knowing the internals of RoaringBitmap a little.  Blocks span 2^16
+    // values, and they use a bitmap (dense) if they have more than 4096 values, and an
+    // array (sparse) if they use less.  So we just create two cases, one sparse and one dense.
+    // and we use a roaring bitmap for the empty blocks, so we trigger the dense case w/ mostly
+    // empty blocks
+
     val ser = new KryoSerializer(conf).newInstance()
     val denseBlockSizes = new Array[Long](5000)
     val sparseBlockSizes = Array[Long](0L, 1L, 0L, 2L)
diff --git a/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala b/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
index b0db0988eeaa..69dbfa9cd714 100644
--- a/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/collection/BitSetSuite.scala
@@ -17,10 +17,7 @@
 
 package org.apache.spark.util.collection
 
-import java.io.{File, FileInputStream, FileOutputStream, ObjectInputStream, ObjectOutputStream}
-
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.util.{Utils => UUtils}
 
 class BitSetSuite extends SparkFunSuite {
 
@@ -155,50 +152,4 @@ class BitSetSuite extends SparkFunSuite {
     assert(bitsetDiff.nextSetBit(85) === 85)
     assert(bitsetDiff.nextSetBit(86) === -1)
   }
-
-  test("read and write externally") {
-    val tempDir = UUtils.createTempDir()
-    val outputFile = File.createTempFile("bits", null, tempDir)
-
-    val fos = new FileOutputStream(outputFile)
-    val oos = new ObjectOutputStream(fos)
-
-    // Create BitSet
-    val setBits = Seq(0, 9, 1, 10, 90, 96)
-    val bitset = new BitSet(100)
-
-    for (i <- 0 until 100) {
-      assert(!bitset.get(i))
-    }
-
-    setBits.foreach(i => bitset.set(i))
-
-    for (i <- 0 until 100) {
-      if (setBits.contains(i)) {
-        assert(bitset.get(i))
-      } else {
-        assert(!bitset.get(i))
-      }
-    }
-    assert(bitset.cardinality() === setBits.size)
-
-    bitset.writeExternal(oos)
-    oos.close()
-
-    val fis = new FileInputStream(outputFile)
-    val ois = new ObjectInputStream(fis)
-
-    // Read BitSet from the file
-    val bitset2 = new BitSet(0)
-    bitset2.readExternal(ois)
-
-    for (i <- 0 until 100) {
-      if (setBits.contains(i)) {
-        assert(bitset2.get(i))
-      } else {
-        assert(!bitset2.get(i))
-      }
-    }
-    assert(bitset2.cardinality() === setBits.size)
-  }
 }
diff --git a/pom.xml b/pom.xml
index 01afa8061789..2a8a44505717 100644
--- a/pom.xml
+++ b/pom.xml
@@ -634,6 +634,11 @@
           </exclusion>
         </exclusions>
       </dependency>
+      <dependency>
+        <groupId>org.roaringbitmap</groupId>
+        <artifactId>RoaringBitmap</artifactId>
+        <version>0.4.5</version>
+      </dependency>
       <dependency>
         <groupId>commons-net</groupId>
         <artifactId>commons-net</artifactId>

From bcea0bfda66a30ee86790b048de5cb47b4d0b32f Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Mon, 16 Nov 2015 15:06:06 -0800
Subject: [PATCH 705/896] [SPARK-11742][STREAMING] Add the failure info to the
 batch lists

<img width="1365" alt="screen shot 2015-11-13 at 9 57 43 pm" src="https://cloud.githubusercontent.com/assets/1000778/11162322/9b88e204-8a51-11e5-8c57-a44889cab713.png">

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9711 from zsxwing/failure-info.
---
 .../spark/streaming/ui/AllBatchesTable.scala  | 61 +++++++++++++++++--
 .../apache/spark/streaming/ui/BatchPage.scala | 49 ++-------------
 .../apache/spark/streaming/ui/UIUtils.scala   | 60 ++++++++++++++++++
 3 files changed, 120 insertions(+), 50 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
index 125cafd41b8a..d33972342731 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/AllBatchesTable.scala
@@ -33,6 +33,22 @@ private[ui] abstract class BatchTableBase(tableId: String, batchInterval: Long)
         {SparkUIUtils.tooltip("Time taken to process all jobs of a batch", "top")}</th>
   }
 
+  /**
+   * Return the first failure reason if finding in the batches.
+   */
+  protected def getFirstFailureReason(batches: Seq[BatchUIData]): Option[String] = {
+    batches.flatMap(_.outputOperations.flatMap(_._2.failureReason)).headOption
+  }
+
+  protected def getFirstFailureTableCell(batch: BatchUIData): Seq[Node] = {
+    val firstFailureReason = batch.outputOperations.flatMap(_._2.failureReason).headOption
+    firstFailureReason.map { failureReason =>
+      val failureReasonForUI = UIUtils.createOutputOperationFailureForUI(failureReason)
+      UIUtils.failureReasonCell(
+        failureReasonForUI, rowspan = 1, includeFirstLineInExpandDetails = false)
+    }.getOrElse(<td>-</td>)
+  }
+
   protected def baseRow(batch: BatchUIData): Seq[Node] = {
     val batchTime = batch.batchTime.milliseconds
     val formattedBatchTime = UIUtils.formatBatchTime(batchTime, batchInterval)
@@ -97,9 +113,17 @@ private[ui] class ActiveBatchTable(
     waitingBatches: Seq[BatchUIData],
     batchInterval: Long) extends BatchTableBase("active-batches-table", batchInterval) {
 
+  private val firstFailureReason = getFirstFailureReason(runningBatches)
+
   override protected def columns: Seq[Node] = super.columns ++ {
     <th>Output Ops: Succeeded/Total</th>
-      <th>Status</th>
+      <th>Status</th> ++ {
+      if (firstFailureReason.nonEmpty) {
+        <th>Error</th>
+      } else {
+        Nil
+      }
+    }
   }
 
   override protected def renderRows: Seq[Node] = {
@@ -110,20 +134,41 @@ private[ui] class ActiveBatchTable(
   }
 
   private def runningBatchRow(batch: BatchUIData): Seq[Node] = {
-    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>processing</td>
+    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>processing</td> ++ {
+      if (firstFailureReason.nonEmpty) {
+        getFirstFailureTableCell(batch)
+      } else {
+        Nil
+      }
+    }
   }
 
   private def waitingBatchRow(batch: BatchUIData): Seq[Node] = {
-    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>queued</td>
+    baseRow(batch) ++ createOutputOperationProgressBar(batch) ++ <td>queued</td>++ {
+      if (firstFailureReason.nonEmpty) {
+        // Waiting batches have not run yet, so must have no failure reasons.
+        <td>-</td>
+      } else {
+        Nil
+      }
+    }
   }
 }
 
 private[ui] class CompletedBatchTable(batches: Seq[BatchUIData], batchInterval: Long)
   extends BatchTableBase("completed-batches-table", batchInterval) {
 
+  private val firstFailureReason = getFirstFailureReason(batches)
+
   override protected def columns: Seq[Node] = super.columns ++ {
     <th>Total Delay {SparkUIUtils.tooltip("Total time taken to handle a batch", "top")}</th>
-      <th>Output Ops: Succeeded/Total</th>
+      <th>Output Ops: Succeeded/Total</th> ++ {
+      if (firstFailureReason.nonEmpty) {
+        <th>Error</th>
+      } else {
+        Nil
+      }
+    }
   }
 
   override protected def renderRows: Seq[Node] = {
@@ -138,6 +183,12 @@ private[ui] class CompletedBatchTable(batches: Seq[BatchUIData], batchInterval:
       <td sorttable_customkey={totalDelay.getOrElse(Long.MaxValue).toString}>
         {formattedTotalDelay}
       </td>
-    } ++ createOutputOperationProgressBar(batch)
+    } ++ createOutputOperationProgressBar(batch)++ {
+      if (firstFailureReason.nonEmpty) {
+        getFirstFailureTableCell(batch)
+      } else {
+        Nil
+      }
+    }
   }
 }
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
index 2ed925572826..bc1711930d3a 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/BatchPage.scala
@@ -149,7 +149,7 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
             total = sparkJob.numTasks - sparkJob.numSkippedTasks)
         }
       </td>
-      {failureReasonCell(lastFailureReason, rowspan = 1)}
+      {UIUtils.failureReasonCell(lastFailureReason)}
     </tr>
   }
 
@@ -245,48 +245,6 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
     </div>
   }
 
-  private def failureReasonCell(
-      failureReason: String,
-      rowspan: Int,
-      includeFirstLineInExpandDetails: Boolean = true): Seq[Node] = {
-    val isMultiline = failureReason.indexOf('\n') >= 0
-    // Display the first line by default
-    val failureReasonSummary = StringEscapeUtils.escapeHtml4(
-      if (isMultiline) {
-        failureReason.substring(0, failureReason.indexOf('\n'))
-      } else {
-        failureReason
-      })
-    val failureDetails =
-      if (isMultiline && !includeFirstLineInExpandDetails) {
-        // Skip the first line
-        failureReason.substring(failureReason.indexOf('\n') + 1)
-      } else {
-        failureReason
-      }
-    val details = if (isMultiline) {
-      // scalastyle:off
-      <span onclick="this.parentNode.querySelector('.stacktrace-details').classList.toggle('collapsed')"
-            class="expand-details">
-        +details
-      </span> ++
-        <div class="stacktrace-details collapsed">
-          <pre>{failureDetails}</pre>
-        </div>
-      // scalastyle:on
-    } else {
-      ""
-    }
-
-    if (rowspan == 1) {
-      <td valign="middle" style="max-width: 300px">{failureReasonSummary}{details}</td>
-    } else {
-      <td valign="middle" style="max-width: 300px" rowspan={rowspan.toString}>
-        {failureReasonSummary}{details}
-      </td>
-    }
-  }
-
   private def getJobData(sparkJobId: SparkJobId): Option[JobUIData] = {
     sparkListener.activeJobs.get(sparkJobId).orElse {
       sparkListener.completedJobs.find(_.jobId == sparkJobId).orElse {
@@ -434,8 +392,9 @@ private[ui] class BatchPage(parent: StreamingTab) extends WebUIPage("batch") {
   private def outputOpStatusCell(outputOp: OutputOperationUIData, rowspan: Int): Seq[Node] = {
     outputOp.failureReason match {
       case Some(failureReason) =>
-        val failureReasonForUI = generateOutputOperationStatusForUI(failureReason)
-        failureReasonCell(failureReasonForUI, rowspan, includeFirstLineInExpandDetails = false)
+        val failureReasonForUI = UIUtils.createOutputOperationFailureForUI(failureReason)
+        UIUtils.failureReasonCell(
+          failureReasonForUI, rowspan, includeFirstLineInExpandDetails = false)
       case None =>
         if (outputOp.endTime.isEmpty) {
           <td rowspan={rowspan.toString}>-</td>
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/ui/UIUtils.scala b/streaming/src/main/scala/org/apache/spark/streaming/ui/UIUtils.scala
index 86cfb1fa4737..d89f7ad3e16b 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/ui/UIUtils.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/ui/UIUtils.scala
@@ -17,6 +17,10 @@
 
 package org.apache.spark.streaming.ui
 
+import scala.xml.Node
+
+import org.apache.commons.lang3.StringEscapeUtils
+
 import java.text.SimpleDateFormat
 import java.util.TimeZone
 import java.util.concurrent.TimeUnit
@@ -124,4 +128,60 @@ private[streaming] object UIUtils {
       }
     }
   }
+
+  def createOutputOperationFailureForUI(failure: String): String = {
+    if (failure.startsWith("org.apache.spark.Spark")) {
+      // SparkException or SparkDriverExecutionException
+      "Failed due to Spark job error\n" + failure
+    } else {
+      var nextLineIndex = failure.indexOf("\n")
+      if (nextLineIndex < 0) {
+        nextLineIndex = failure.size
+      }
+      val firstLine = failure.substring(0, nextLineIndex)
+      s"Failed due to error: $firstLine\n$failure"
+    }
+  }
+
+  def failureReasonCell(
+      failureReason: String,
+      rowspan: Int = 1,
+      includeFirstLineInExpandDetails: Boolean = true): Seq[Node] = {
+    val isMultiline = failureReason.indexOf('\n') >= 0
+    // Display the first line by default
+    val failureReasonSummary = StringEscapeUtils.escapeHtml4(
+      if (isMultiline) {
+        failureReason.substring(0, failureReason.indexOf('\n'))
+      } else {
+        failureReason
+      })
+    val failureDetails =
+      if (isMultiline && !includeFirstLineInExpandDetails) {
+        // Skip the first line
+        failureReason.substring(failureReason.indexOf('\n') + 1)
+      } else {
+        failureReason
+      }
+    val details = if (isMultiline) {
+      // scalastyle:off
+      <span onclick="this.parentNode.querySelector('.stacktrace-details').classList.toggle('collapsed')"
+            class="expand-details">
+        +details
+      </span> ++
+        <div class="stacktrace-details collapsed">
+          <pre>{failureDetails}</pre>
+        </div>
+      // scalastyle:on
+    } else {
+      ""
+    }
+
+    if (rowspan == 1) {
+      <td valign="middle" style="max-width: 300px">{failureReasonSummary}{details}</td>
+    } else {
+      <td valign="middle" style="max-width: 300px" rowspan={rowspan.toString}>
+        {failureReasonSummary}{details}
+      </td>
+    }
+  }
 }

From 31296628ac7cd7be71e0edca335dc8604f62bb47 Mon Sep 17 00:00:00 2001
From: Bartlomiej Alberski <bartlomiej.alberski@allegrogroup.com>
Date: Mon, 16 Nov 2015 15:14:38 -0800
Subject: [PATCH 706/896] [SPARK-11553][SQL] Primitive Row accessors should not
 convert null to default value

Invocation of getters for type extending AnyVal returns default value (if field value is null) instead of throwing NPE. Please check comments for SPARK-11553 issue for more details.

Author: Bartlomiej Alberski <bartlomiej.alberski@allegrogroup.com>

Closes #9642 from alberskib/bugfix/SPARK-11553.
---
 .../main/scala/org/apache/spark/sql/Row.scala | 32 ++++++++++++-----
 .../scala/org/apache/spark/sql/RowTest.scala  | 20 +++++++++++
 .../local/NestedLoopJoinNodeSuite.scala       | 36 +++++++++++--------
 3 files changed, 65 insertions(+), 23 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
index 0f0f200122c3..b14c66cc5ac8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Row.scala
@@ -191,7 +191,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getBoolean(i: Int): Boolean = getAs[Boolean](i)
+  def getBoolean(i: Int): Boolean = getAnyValAs[Boolean](i)
 
   /**
    * Returns the value at position i as a primitive byte.
@@ -199,7 +199,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getByte(i: Int): Byte = getAs[Byte](i)
+  def getByte(i: Int): Byte = getAnyValAs[Byte](i)
 
   /**
    * Returns the value at position i as a primitive short.
@@ -207,7 +207,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getShort(i: Int): Short = getAs[Short](i)
+  def getShort(i: Int): Short = getAnyValAs[Short](i)
 
   /**
    * Returns the value at position i as a primitive int.
@@ -215,7 +215,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getInt(i: Int): Int = getAs[Int](i)
+  def getInt(i: Int): Int = getAnyValAs[Int](i)
 
   /**
    * Returns the value at position i as a primitive long.
@@ -223,7 +223,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getLong(i: Int): Long = getAs[Long](i)
+  def getLong(i: Int): Long = getAnyValAs[Long](i)
 
   /**
    * Returns the value at position i as a primitive float.
@@ -232,7 +232,7 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getFloat(i: Int): Float = getAs[Float](i)
+  def getFloat(i: Int): Float = getAnyValAs[Float](i)
 
   /**
    * Returns the value at position i as a primitive double.
@@ -240,13 +240,12 @@ trait Row extends Serializable {
    * @throws ClassCastException when data type does not match.
    * @throws NullPointerException when value is null.
    */
-  def getDouble(i: Int): Double = getAs[Double](i)
+  def getDouble(i: Int): Double = getAnyValAs[Double](i)
 
   /**
    * Returns the value at position i as a String object.
    *
    * @throws ClassCastException when data type does not match.
-   * @throws NullPointerException when value is null.
    */
   def getString(i: Int): String = getAs[String](i)
 
@@ -318,6 +317,8 @@ trait Row extends Serializable {
 
   /**
    * Returns the value at position i.
+   * For primitive types if value is null it returns 'zero value' specific for primitive
+   * ie. 0 for Int - use isNullAt to ensure that value is not null
    *
    * @throws ClassCastException when data type does not match.
    */
@@ -325,6 +326,8 @@ trait Row extends Serializable {
 
   /**
    * Returns the value of a given fieldName.
+   * For primitive types if value is null it returns 'zero value' specific for primitive
+   * ie. 0 for Int - use isNullAt to ensure that value is not null
    *
    * @throws UnsupportedOperationException when schema is not defined.
    * @throws IllegalArgumentException when fieldName do not exist.
@@ -344,6 +347,8 @@ trait Row extends Serializable {
 
   /**
    * Returns a Map(name -> value) for the requested fieldNames
+   * For primitive types if value is null it returns 'zero value' specific for primitive
+   * ie. 0 for Int - use isNullAt to ensure that value is not null
    *
    * @throws UnsupportedOperationException when schema is not defined.
    * @throws IllegalArgumentException when fieldName do not exist.
@@ -458,4 +463,15 @@ trait Row extends Serializable {
    * start, end, and separator strings.
    */
   def mkString(start: String, sep: String, end: String): String = toSeq.mkString(start, sep, end)
+
+  /**
+   * Returns the value of a given fieldName.
+   *
+   * @throws UnsupportedOperationException when schema is not defined.
+   * @throws ClassCastException when data type does not match.
+   * @throws NullPointerException when value is null.
+   */
+  private def getAnyValAs[T <: AnyVal](i: Int): T =
+    if (isNullAt(i)) throw new NullPointerException(s"Value at index $i in null")
+    else getAs[T](i)
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/RowTest.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/RowTest.scala
index 01ff84cb5605..5c22a7219254 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/RowTest.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/RowTest.scala
@@ -29,8 +29,10 @@ class RowTest extends FunSpec with Matchers {
     StructField("col2", StringType) ::
     StructField("col3", IntegerType) :: Nil)
   val values = Array("value1", "value2", 1)
+  val valuesWithoutCol3 = Array[Any](null, "value2", null)
 
   val sampleRow: Row = new GenericRowWithSchema(values, schema)
+  val sampleRowWithoutCol3: Row = new GenericRowWithSchema(valuesWithoutCol3, schema)
   val noSchemaRow: Row = new GenericRow(values)
 
   describe("Row (without schema)") {
@@ -68,6 +70,24 @@ class RowTest extends FunSpec with Matchers {
       )
       sampleRow.getValuesMap(List("col1", "col2")) shouldBe expected
     }
+
+    it("getValuesMap() retrieves null value on non AnyVal Type") {
+      val expected = Map(
+        "col1" -> null,
+        "col2" -> "value2"
+      )
+      sampleRowWithoutCol3.getValuesMap[String](List("col1", "col2")) shouldBe expected
+    }
+
+    it("getAs() on type extending AnyVal throws an exception when accessing field that is null") {
+      intercept[NullPointerException] {
+        sampleRowWithoutCol3.getInt(sampleRowWithoutCol3.fieldIndex("col3"))
+      }
+    }
+
+    it("getAs() on type extending AnyVal does not throw exception when value is null"){
+      sampleRowWithoutCol3.getAs[String](sampleRowWithoutCol3.fieldIndex("col1")) shouldBe null
+    }
   }
 
   describe("row equals") {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
index 252f7cc8971f..45df2ea6552d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/local/NestedLoopJoinNodeSuite.scala
@@ -58,8 +58,14 @@ class NestedLoopJoinNodeSuite extends LocalNodeTest {
       val hashJoinNode = makeUnsafeNode(leftNode, rightNode)
       val expectedOutput = generateExpectedOutput(leftInput, rightInput, joinType)
       val actualOutput = hashJoinNode.collect().map { row =>
-        // (id, name, id, nickname)
-        (row.getInt(0), row.getString(1), row.getInt(2), row.getString(3))
+        // (
+        //   id, name,
+        //   id, nickname
+        // )
+        (
+          Option(row.get(0)).map(_.asInstanceOf[Int]), Option(row.getString(1)),
+          Option(row.get(2)).map(_.asInstanceOf[Int]), Option(row.getString(3))
+        )
       }
       assert(actualOutput.toSet === expectedOutput.toSet)
     }
@@ -95,36 +101,36 @@ class NestedLoopJoinNodeSuite extends LocalNodeTest {
   private def generateExpectedOutput(
       leftInput: Array[(Int, String)],
       rightInput: Array[(Int, String)],
-      joinType: JoinType): Array[(Int, String, Int, String)] = {
+      joinType: JoinType): Array[(Option[Int], Option[String], Option[Int], Option[String])] = {
     joinType match {
       case LeftOuter =>
         val rightInputMap = rightInput.toMap
         leftInput.map { case (k, v) =>
-          val rightKey = rightInputMap.get(k).map { _ => k }.getOrElse(0)
-          val rightValue = rightInputMap.getOrElse(k, null)
-          (k, v, rightKey, rightValue)
+          val rightKey = rightInputMap.get(k).map { _ => k }
+          val rightValue = rightInputMap.get(k)
+          (Some(k), Some(v), rightKey, rightValue)
         }
 
       case RightOuter =>
         val leftInputMap = leftInput.toMap
         rightInput.map { case (k, v) =>
-          val leftKey = leftInputMap.get(k).map { _ => k }.getOrElse(0)
-          val leftValue = leftInputMap.getOrElse(k, null)
-          (leftKey, leftValue, k, v)
+          val leftKey = leftInputMap.get(k).map { _ => k }
+          val leftValue = leftInputMap.get(k)
+          (leftKey, leftValue, Some(k), Some(v))
         }
 
       case FullOuter =>
         val leftInputMap = leftInput.toMap
         val rightInputMap = rightInput.toMap
         val leftOutput = leftInput.map { case (k, v) =>
-          val rightKey = rightInputMap.get(k).map { _ => k }.getOrElse(0)
-          val rightValue = rightInputMap.getOrElse(k, null)
-          (k, v, rightKey, rightValue)
+          val rightKey = rightInputMap.get(k).map { _ => k }
+          val rightValue = rightInputMap.get(k)
+          (Some(k), Some(v), rightKey, rightValue)
         }
         val rightOutput = rightInput.map { case (k, v) =>
-          val leftKey = leftInputMap.get(k).map { _ => k }.getOrElse(0)
-          val leftValue = leftInputMap.getOrElse(k, null)
-          (leftKey, leftValue, k, v)
+          val leftKey = leftInputMap.get(k).map { _ => k }
+          val leftValue = leftInputMap.get(k)
+          (leftKey, leftValue, Some(k), Some(v))
         }
         (leftOutput ++ rightOutput).distinct
 

From 75ee12f09c2645c1ad682764d512965f641eb5c2 Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Mon, 16 Nov 2015 15:22:12 -0800
Subject: [PATCH 707/896] [SPARK-8658][SQL] AttributeReference's equals method
 compares all the members

This fix is to change the equals method to check all of the specified fields for equality of AttributeReference.

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9216 from gatorsmile/namedExpressEqual.
---
 .../sql/catalyst/expressions/namedExpressions.scala  |  4 +++-
 .../sql/catalyst/plans/logical/basicOperators.scala  | 10 +++++-----
 .../sql/catalyst/plans/physical/partitioning.scala   | 12 ++++++------
 3 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index f80bcfcb0b0b..e3daddace241 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -194,7 +194,9 @@ case class AttributeReference(
   def sameRef(other: AttributeReference): Boolean = this.exprId == other.exprId
 
   override def equals(other: Any): Boolean = other match {
-    case ar: AttributeReference => name == ar.name && exprId == ar.exprId && dataType == ar.dataType
+    case ar: AttributeReference =>
+      name == ar.name && dataType == ar.dataType && nullable == ar.nullable &&
+        metadata == ar.metadata && exprId == ar.exprId && qualifiers == ar.qualifiers
     case _ => false
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index e2b97b27a6c2..45630a591d34 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -23,7 +23,7 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate.AggregateExpression
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.types._
-import org.apache.spark.util.collection.OpenHashSet
+import scala.collection.mutable.ArrayBuffer
 
 case class Project(projectList: Seq[NamedExpression], child: LogicalPlan) extends UnaryNode {
   override def output: Seq[Attribute] = projectList.map(_.toAttribute)
@@ -244,12 +244,12 @@ private[sql] object Expand {
    */
   private def buildNonSelectExprSet(
       bitmask: Int,
-      exprs: Seq[Expression]): OpenHashSet[Expression] = {
-    val set = new OpenHashSet[Expression](2)
+      exprs: Seq[Expression]): ArrayBuffer[Expression] = {
+    val set = new ArrayBuffer[Expression](2)
 
     var bit = exprs.length - 1
     while (bit >= 0) {
-      if (((bitmask >> bit) & 1) == 0) set.add(exprs(bit))
+      if (((bitmask >> bit) & 1) == 0) set += exprs(bit)
       bit -= 1
     }
 
@@ -279,7 +279,7 @@ private[sql] object Expand {
 
       (child.output :+ gid).map(expr => expr transformDown {
         // TODO this causes a problem when a column is used both for grouping and aggregation.
-        case x: Expression if nonSelectedGroupExprSet.contains(x) =>
+        case x: Expression if nonSelectedGroupExprSet.exists(_.semanticEquals(x)) =>
           // if the input attribute in the Invalid Grouping Expression set of for this group
           // replace it with constant null
           Literal.create(null, expr.dataType)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
index 86b9417477ba..f6fb31a2af59 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala
@@ -235,17 +235,17 @@ case class HashPartitioning(expressions: Seq[Expression], numPartitions: Int)
   override def satisfies(required: Distribution): Boolean = required match {
     case UnspecifiedDistribution => true
     case ClusteredDistribution(requiredClustering) =>
-      expressions.toSet.subsetOf(requiredClustering.toSet)
+      expressions.forall(x => requiredClustering.exists(_.semanticEquals(x)))
     case _ => false
   }
 
   override def compatibleWith(other: Partitioning): Boolean = other match {
-    case o: HashPartitioning => this == o
+    case o: HashPartitioning => this.semanticEquals(o)
     case _ => false
   }
 
   override def guarantees(other: Partitioning): Boolean = other match {
-    case o: HashPartitioning => this == o
+    case o: HashPartitioning => this.semanticEquals(o)
     case _ => false
   }
 
@@ -276,17 +276,17 @@ case class RangePartitioning(ordering: Seq[SortOrder], numPartitions: Int)
       val minSize = Seq(requiredOrdering.size, ordering.size).min
       requiredOrdering.take(minSize) == ordering.take(minSize)
     case ClusteredDistribution(requiredClustering) =>
-      ordering.map(_.child).toSet.subsetOf(requiredClustering.toSet)
+      ordering.map(_.child).forall(x => requiredClustering.exists(_.semanticEquals(x)))
     case _ => false
   }
 
   override def compatibleWith(other: Partitioning): Boolean = other match {
-    case o: RangePartitioning => this == o
+    case o: RangePartitioning => this.semanticEquals(o)
     case _ => false
   }
 
   override def guarantees(other: Partitioning): Boolean = other match {
-    case o: RangePartitioning => this == o
+    case o: RangePartitioning => this.semanticEquals(o)
     case _ => false
   }
 }

From fd14936be7beff543dbbcf270f2f9749f7a803c4 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 16 Nov 2015 15:32:49 -0800
Subject: [PATCH 708/896] [SPARK-11625][SQL] add java test for typed aggregate

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9591 from cloud-fan/agg-test.
---
 .../spark/api/java/function/Function.java     |  2 +-
 .../org/apache/spark/sql/GroupedDataset.scala | 34 ++++++++++-
 .../spark/sql/expressions/Aggregator.scala    |  2 +-
 .../apache/spark/sql/JavaDatasetSuite.java    | 56 +++++++++++++++++++
 .../spark/sql/DatasetAggregatorSuite.scala    |  7 +--
 5 files changed, 92 insertions(+), 9 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/api/java/function/Function.java b/core/src/main/java/org/apache/spark/api/java/function/Function.java
index d00551bb0add..b9d9777a7565 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/Function.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/Function.java
@@ -25,5 +25,5 @@
  * when mapping RDDs of other types.
  */
 public interface Function<T1, R> extends Serializable {
-  public R call(T1 v1) throws Exception;
+  R call(T1 v1) throws Exception;
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index ebcf4c8bfe7e..467cd42b9b8d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -145,9 +145,37 @@ class GroupedDataset[K, T] private[sql](
     reduce(f.call _)
   }
 
-  // To ensure valid overloading.
-  protected def agg(expr: Column, exprs: Column*): DataFrame =
-    groupedData.agg(expr, exprs: _*)
+  /**
+   * Compute aggregates by specifying a series of aggregate columns, and return a [[DataFrame]].
+   * We can call `as[T : Encoder]` to turn the returned [[DataFrame]] to [[Dataset]] again.
+   *
+   * The available aggregate methods are defined in [[org.apache.spark.sql.functions]].
+   *
+   * {{{
+   *   // Selects the age of the oldest employee and the aggregate expense for each department
+   *
+   *   // Scala:
+   *   import org.apache.spark.sql.functions._
+   *   df.groupBy("department").agg(max("age"), sum("expense"))
+   *
+   *   // Java:
+   *   import static org.apache.spark.sql.functions.*;
+   *   df.groupBy("department").agg(max("age"), sum("expense"));
+   * }}}
+   *
+   * We can also use `Aggregator.toColumn` to pass in typed aggregate functions.
+   *
+   * @since 1.6.0
+   */
+  @scala.annotation.varargs
+  def agg(expr: Column, exprs: Column*): DataFrame =
+    groupedData.agg(withEncoder(expr), exprs.map(withEncoder): _*)
+
+  private def withEncoder(c: Column): Column = c match {
+    case tc: TypedColumn[_, _] =>
+      tc.withInputType(resolvedTEncoder.bind(dataAttributes), dataAttributes)
+    case _ => c
+  }
 
   /**
    * Internal helper function for building typed aggregations that return tuples.  For simplicity
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 360c9a5bc15e..72610e735f78 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -47,7 +47,7 @@ import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
  * @tparam B The type of the intermediate value of the reduction.
  * @tparam C The type of the final result.
  */
-abstract class Aggregator[-A, B, C] {
+abstract class Aggregator[-A, B, C] extends Serializable {
 
   /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
   def zero: B
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index eb6fa1e72e27..d9b22506fbd3 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -34,6 +34,7 @@
 import org.apache.spark.sql.Encoders;
 import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.GroupedDataset;
+import org.apache.spark.sql.expressions.Aggregator;
 import org.apache.spark.sql.test.TestSQLContext;
 
 import static org.apache.spark.sql.functions.*;
@@ -381,4 +382,59 @@ public void testNestedTupleEncoder() {
       context.createDataset(data3, encoder3);
     Assert.assertEquals(data3, ds3.collectAsList());
   }
+
+  @Test
+  public void testTypedAggregation() {
+    Encoder<Tuple2<String, Integer>> encoder = Encoders.tuple(Encoders.STRING(), Encoders.INT());
+    List<Tuple2<String, Integer>> data =
+      Arrays.asList(tuple2("a", 1), tuple2("a", 2), tuple2("b", 3));
+    Dataset<Tuple2<String, Integer>> ds = context.createDataset(data, encoder);
+
+    GroupedDataset<String, Tuple2<String, Integer>> grouped = ds.groupBy(
+      new MapFunction<Tuple2<String, Integer>, String>() {
+        @Override
+        public String call(Tuple2<String, Integer> value) throws Exception {
+          return value._1();
+        }
+      },
+      Encoders.STRING());
+
+    Dataset<Tuple2<String, Integer>> agged =
+      grouped.agg(new IntSumOf().toColumn(Encoders.INT(), Encoders.INT()));
+    Assert.assertEquals(Arrays.asList(tuple2("a", 3), tuple2("b", 3)), agged.collectAsList());
+
+    Dataset<Tuple4<String, Integer, Long, Long>> agged2 = grouped.agg(
+      new IntSumOf().toColumn(Encoders.INT(), Encoders.INT()),
+      expr("sum(_2)"),
+      count("*"))
+      .as(Encoders.tuple(Encoders.STRING(), Encoders.INT(), Encoders.LONG(), Encoders.LONG()));
+    Assert.assertEquals(
+      Arrays.asList(
+        new Tuple4<String, Integer, Long, Long>("a", 3, 3L, 2L),
+        new Tuple4<String, Integer, Long, Long>("b", 3, 3L, 1L)),
+      agged2.collectAsList());
+  }
+
+  static class IntSumOf extends Aggregator<Tuple2<String, Integer>, Integer, Integer> {
+
+    @Override
+    public Integer zero() {
+      return 0;
+    }
+
+    @Override
+    public Integer reduce(Integer l, Tuple2<String, Integer> t) {
+      return l + t._2();
+    }
+
+    @Override
+    public Integer merge(Integer b1, Integer b2) {
+      return b1 + b2;
+    }
+
+    @Override
+    public Integer finish(Integer reduction) {
+      return reduction;
+    }
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 46f9f077fe7f..937758979001 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -25,7 +25,7 @@ import org.apache.spark.sql.functions._
 import org.apache.spark.sql.expressions.Aggregator
 
 /** An `Aggregator` that adds up any numeric type returned by the given function. */
-class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializable {
+class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] {
   val numeric = implicitly[Numeric[N]]
 
   override def zero: N = numeric.zero
@@ -37,7 +37,7 @@ class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializ
   override def finish(reduction: N): N = reduction
 }
 
-object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] with Serializable {
+object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] {
   override def zero: (Long, Long) = (0, 0)
 
   override def reduce(countAndSum: (Long, Long), input: (String, Int)): (Long, Long) = {
@@ -51,8 +51,7 @@ object TypedAverage extends Aggregator[(String, Int), (Long, Long), Double] with
   override def finish(countAndSum: (Long, Long)): Double = countAndSum._2 / countAndSum._1
 }
 
-object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, Long)]
-  with Serializable {
+object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, Long)] {
 
   override def zero: (Long, Long) = (0, 0)
 

From ea6f53e48a911b49dc175ccaac8c80e0a1d97a09 Mon Sep 17 00:00:00 2001
From: Shivaram Venkataraman <shivaram@cs.berkeley.edu>
Date: Mon, 16 Nov 2015 16:57:50 -0800
Subject: [PATCH 709/896] [SPARKR][HOTFIX] Disable flaky SparkR package build
 test

See https://github.com/apache/spark/pull/9390#issuecomment-157160063 and https://gist.github.com/shivaram/3a2fecce60768a603dac for more information

Author: Shivaram Venkataraman <shivaram@cs.berkeley.edu>

Closes #9744 from shivaram/sparkr-package-test-disable.
---
 .../test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
index 42e748ec6d52..d494b0caab85 100644
--- a/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/SparkSubmitSuite.scala
@@ -369,7 +369,9 @@ class SparkSubmitSuite
     }
   }
 
-  test("correctly builds R packages included in a jar with --packages") {
+  // TODO(SPARK-9603): Building a package is flaky on Jenkins Maven builds.
+  // See https://gist.github.com/shivaram/3a2fecce60768a603dac for a error log
+  ignore("correctly builds R packages included in a jar with --packages") {
     assume(RUtils.isRInstalled, "R isn't installed on this machine.")
     val main = MavenCoordinate("my.great.lib", "mylib", "0.1")
     val sparkHome = sys.props.getOrElse("spark.test.home", fail("spark.test.home is not set!"))

From 30f3cfda1cce8760f15c0a48a8c47f09a5167fca Mon Sep 17 00:00:00 2001
From: Kousuke Saruta <sarutak@oss.nttdata.co.jp>
Date: Mon, 16 Nov 2015 16:59:16 -0800
Subject: [PATCH 710/896] [SPARK-11480][CORE][WEBUI] Wrong callsite is
 displayed when using AsyncRDDActions#takeAsync

When we call AsyncRDDActions#takeAsync, actually another DAGScheduler#runJob is called from another thread so we cannot get proper callsite infomation.

Following screenshots are before this patch applied and after.

Before:
<img width="1268" alt="2015-11-04 1 26 40" src="https://cloud.githubusercontent.com/assets/4736016/10914069/0ffc1306-8294-11e5-8e89-c4fadf58dd12.png">
<img width="1258" alt="2015-11-04 1 26 52" src="https://cloud.githubusercontent.com/assets/4736016/10914070/0ffe84ce-8294-11e5-8b2a-69d36276bedb.png">

After:
<img width="1268" alt="2015-11-04 0 48 07" src="https://cloud.githubusercontent.com/assets/4736016/10914080/1d8cfb7a-8294-11e5-9e09-ede25c2563e8.png">
<img width="1269" alt="2015-11-04 0 48 26" src="https://cloud.githubusercontent.com/assets/4736016/10914081/1d934e3a-8294-11e5-8b5e-e3dc37aaced3.png">

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #9437 from sarutak/SPARK-11480.
---
 core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala b/core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala
index ca1eb1f4e4a9..d5e853613b05 100644
--- a/core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/AsyncRDDActions.scala
@@ -66,6 +66,7 @@ class AsyncRDDActions[T: ClassTag](self: RDD[T]) extends Serializable with Loggi
    */
   def takeAsync(num: Int): FutureAction[Seq[T]] = self.withScope {
     val f = new ComplexFutureAction[Seq[T]]
+    val callSite = self.context.getCallSite
 
     f.run {
       // This is a blocking action so we should use "AsyncRDDActions.futureExecutionContext" which
@@ -73,6 +74,7 @@ class AsyncRDDActions[T: ClassTag](self: RDD[T]) extends Serializable with Loggi
       val results = new ArrayBuffer[T](num)
       val totalParts = self.partitions.length
       var partsScanned = 0
+      self.context.setCallSite(callSite)
       while (results.size < num && partsScanned < totalParts) {
         // The number of partitions to try in this iteration. It is ok for this number to be
         // greater than totalParts because we actually cap it at totalParts in runJob.

From 33a0ec93771ef5c3b388165b07cfab9014918d3b Mon Sep 17 00:00:00 2001
From: Andrew Or <andrew@databricks.com>
Date: Mon, 16 Nov 2015 17:00:18 -0800
Subject: [PATCH 711/896] [SPARK-11710] Document new memory management model

Author: Andrew Or <andrew@databricks.com>

Closes #9676 from andrewor14/memory-management-docs.
---
 docs/configuration.md | 13 +++++++----
 docs/tuning.md        | 54 ++++++++++++++++++++++++++++---------------
 2 files changed, 44 insertions(+), 23 deletions(-)

diff --git a/docs/configuration.md b/docs/configuration.md
index d961f43acf4a..c496146e3ed6 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -722,17 +722,20 @@ Apart from these, the following properties are also available, and may be useful
     Fraction of the heap space used for execution and storage. The lower this is, the more
     frequently spills and cached data eviction occur. The purpose of this config is to set
     aside memory for internal metadata, user data structures, and imprecise size estimation
-    in the case of sparse, unusually large records.
+    in the case of sparse, unusually large records. Leaving this at the default value is
+    recommended. For more detail, see <a href="tuning.html#memory-management-overview">
+    this description</a>.
   </td>
 </tr>
 <tr>
   <td><code>spark.memory.storageFraction</code></td>
   <td>0.5</td>
   <td>
-    T​he size of the storage region within the space set aside by
-    <code>s​park.memory.fraction</code>. This region is not statically reserved, but dynamically
-    allocated as cache requests come in. ​Cached data may be evicted only if total storage exceeds
-    this region.
+    Amount of storage memory immune to eviction, expressed as a fraction of the size of the
+    region set aside by <code>s​park.memory.fraction</code>. The higher this is, the less
+    working memory may be available to execution and tasks may spill to disk more often.
+    Leaving this at the default value is recommended. For more detail, see
+    <a href="tuning.html#memory-management-overview">this description</a>.
   </td>
 </tr>
 <tr>
diff --git a/docs/tuning.md b/docs/tuning.md
index 879340a01544..a8fe7a453279 100644
--- a/docs/tuning.md
+++ b/docs/tuning.md
@@ -88,9 +88,39 @@ than the "raw" data inside their fields. This is due to several reasons:
   but also pointers (typically 8 bytes each) to the next object in the list.
 * Collections of primitive types often store them as "boxed" objects such as `java.lang.Integer`.
 
-This section will discuss how to determine the memory usage of your objects, and how to improve
-it -- either by changing your data structures, or by storing data in a serialized format.
-We will then cover tuning Spark's cache size and the Java garbage collector.
+This section will start with an overview of memory management in Spark, then discuss specific
+strategies the user can take to make more efficient use of memory in his/her application. In
+particular, we will describe how to determine the memory usage of your objects, and how to
+improve it -- either by changing your data structures, or by storing data in a serialized
+format. We will then cover tuning Spark's cache size and the Java garbage collector.
+
+## Memory Management Overview
+
+Memory usage in Spark largely falls under one of two categories: execution and storage.
+Execution memory refers to that used for computation in shuffles, joins, sorts and aggregations,
+while storage memory refers to that used for caching and propagating internal data across the
+cluster. In Spark, execution and storage share a unified region (M). When no execution memory is
+used, storage can acquire all the available memory and vice versa. Execution may evict storage
+if necessary, but only until total storage memory usage falls under a certain threshold (R).
+In other words, `R` describes a subregion within `M` where cached blocks are never evicted.
+Storage may not evict execution due to complexities in implementation.
+
+This design ensures several desirable properties. First, applications that do not use caching
+can use the entire space for execution, obviating unnecessary disk spills. Second, applications
+that do use caching can reserve a minimum storage space (R) where their data blocks are immune
+to being evicted. Lastly, this approach provides reasonable out-of-the-box performance for a
+variety of workloads without requiring user expertise of how memory is divided internally.
+
+Although there are two relevant configurations, the typical user should not need to adjust them
+as the default values are applicable to most workloads:
+
+* `spark.memory.fraction` expresses the size of `M` as a fraction of the total JVM heap space
+(default 0.75). The rest of the space (25%) is reserved for user data structures, internal
+metadata in Spark, and safeguarding against OOM errors in the case of sparse and unusually
+large records.
+* `spark.memory.storageFraction` expresses the size of `R` as a fraction of `M` (default 0.5).
+`R` is the storage space within `M` where cached blocks immune to being evicted by execution.
+
 
 ## Determining Memory Consumption
 
@@ -151,18 +181,6 @@ time spent GC. This can be done by adding `-verbose:gc -XX:+PrintGCDetails -XX:+
 each time a garbage collection occurs. Note these logs will be on your cluster's worker nodes (in the `stdout` files in
 their work directories), *not* on your driver program.
 
-**Cache Size Tuning**
-
-One important configuration parameter for GC is the amount of memory that should be used for caching RDDs.
-By default, Spark uses 60% of the configured executor memory (`spark.executor.memory`) to
-cache RDDs. This means that 40% of memory is available for any objects created during task execution.
-
-In case your tasks slow down and you find that your JVM is garbage-collecting frequently or running out of
-memory, lowering this value will help reduce the memory consumption. To change this to, say, 50%, you can call
-`conf.set("spark.storage.memoryFraction", "0.5")` on your SparkConf. Combined with the use of serialized caching,
-using a smaller cache should be sufficient to mitigate most of the garbage collection problems.
-In case you are interested in further tuning the Java GC, continue reading below.
-
 **Advanced GC Tuning**
 
 To further tune garbage collection, we first need to understand some basic information about memory management in the JVM:
@@ -183,9 +201,9 @@ temporary objects created during task execution. Some steps which may be useful
 * Check if there are too many garbage collections by collecting GC stats. If a full GC is invoked multiple times for
   before a task completes, it means that there isn't enough memory available for executing tasks.
 
-* In the GC stats that are printed, if the OldGen is close to being full, reduce the amount of memory used for caching.
-  This can be done using the `spark.storage.memoryFraction` property. It is better to cache fewer objects than to slow
-  down task execution!
+* In the GC stats that are printed, if the OldGen is close to being full, reduce the amount of
+  memory used for caching by lowering `spark.memory.storageFraction`; it is better to cache fewer
+  objects than to slow down task execution!
 
 * If there are too many minor collections but not many major GCs, allocating more memory for Eden would help. You
   can set the size of the Eden to be an over-estimate of how much memory each task will need. If the size of Eden

From bd10eb81c98e5e9df453f721943a3e82d9f74ae4 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 16 Nov 2015 17:02:21 -0800
Subject: [PATCH 712/896] [EXAMPLE][MINOR] Add missing awaitTermination in
 click stream example

Author: jerryshao <sshao@hortonworks.com>

Closes #9730 from jerryshao/clickstream-fix.
---
 .../spark/examples/streaming/clickstream/PageViewStream.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/src/main/scala/org/apache/spark/examples/streaming/clickstream/PageViewStream.scala b/examples/src/main/scala/org/apache/spark/examples/streaming/clickstream/PageViewStream.scala
index ec7d39da8b2e..4ef238606f82 100644
--- a/examples/src/main/scala/org/apache/spark/examples/streaming/clickstream/PageViewStream.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/streaming/clickstream/PageViewStream.scala
@@ -18,7 +18,6 @@
 // scalastyle:off println
 package org.apache.spark.examples.streaming.clickstream
 
-import org.apache.spark.SparkContext._
 import org.apache.spark.streaming.{Seconds, StreamingContext}
 import org.apache.spark.examples.streaming.StreamingExamples
 // scalastyle:off
@@ -88,7 +87,7 @@ object PageViewStream {
 
     // An external dataset we want to join to this stream
     val userList = ssc.sparkContext.parallelize(
-       Map(1 -> "Patrick Wendell", 2->"Reynold Xin", 3->"Matei Zaharia").toSeq)
+       Map(1 -> "Patrick Wendell", 2 -> "Reynold Xin", 3 -> "Matei Zaharia").toSeq)
 
     metric match {
       case "pageCounts" => pageCounts.print()
@@ -106,6 +105,7 @@ object PageViewStream {
     }
 
     ssc.start()
+    ssc.awaitTermination()
   }
 }
 // scalastyle:on println

From 1c5475f1401d2233f4c61f213d1e2c2ee9673067 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Mon, 16 Nov 2015 17:12:39 -0800
Subject: [PATCH 713/896] [SPARK-11612][ML] Pipeline and PipelineModel
 persistence

Pipeline and PipelineModel extend Readable and Writable.  Persistence succeeds only when all stages are Writable.

Note: This PR reinstates tests for other read/write functionality.  It should probably not get merged until [https://issues.apache.org/jira/browse/SPARK-11672] gets fixed.

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9674 from jkbradley/pipeline-io.
---
 .../scala/org/apache/spark/ml/Pipeline.scala  | 175 +++++++++++++++++-
 .../org/apache/spark/ml/util/ReadWrite.scala  |   4 +-
 .../org/apache/spark/ml/PipelineSuite.scala   | 120 +++++++++++-
 .../spark/ml/util/DefaultReadWriteTest.scala  |  25 ++-
 4 files changed, 306 insertions(+), 18 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
index a3e59401c5cf..25f0c696f42b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
@@ -22,12 +22,19 @@ import java.{util => ju}
 import scala.collection.JavaConverters._
 import scala.collection.mutable.ListBuffer
 
-import org.apache.spark.Logging
+import org.apache.hadoop.fs.Path
+import org.json4s._
+import org.json4s.jackson.JsonMethods._
+
+import org.apache.spark.{SparkContext, Logging}
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.ml.param.{Param, ParamMap, Params}
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util.Reader
+import org.apache.spark.ml.util.Writer
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.types.StructType
+import org.apache.spark.util.Utils
 
 /**
  * :: DeveloperApi ::
@@ -82,7 +89,7 @@ abstract class PipelineStage extends Params with Logging {
  * an identity transformer.
  */
 @Experimental
-class Pipeline(override val uid: String) extends Estimator[PipelineModel] {
+class Pipeline(override val uid: String) extends Estimator[PipelineModel] with Writable {
 
   def this() = this(Identifiable.randomUID("pipeline"))
 
@@ -166,6 +173,131 @@ class Pipeline(override val uid: String) extends Estimator[PipelineModel] {
       "Cannot have duplicate components in a pipeline.")
     theStages.foldLeft(schema)((cur, stage) => stage.transformSchema(cur))
   }
+
+  override def write: Writer = new Pipeline.PipelineWriter(this)
+}
+
+object Pipeline extends Readable[Pipeline] {
+
+  override def read: Reader[Pipeline] = new PipelineReader
+
+  override def load(path: String): Pipeline = read.load(path)
+
+  private[ml] class PipelineWriter(instance: Pipeline) extends Writer {
+
+    SharedReadWrite.validateStages(instance.getStages)
+
+    override protected def saveImpl(path: String): Unit =
+      SharedReadWrite.saveImpl(instance, instance.getStages, sc, path)
+  }
+
+  private[ml] class PipelineReader extends Reader[Pipeline] {
+
+    /** Checked against metadata when loading model */
+    private val className = "org.apache.spark.ml.Pipeline"
+
+    override def load(path: String): Pipeline = {
+      val (uid: String, stages: Array[PipelineStage]) = SharedReadWrite.load(className, sc, path)
+      new Pipeline(uid).setStages(stages)
+    }
+  }
+
+  /** Methods for [[Reader]] and [[Writer]] shared between [[Pipeline]] and [[PipelineModel]] */
+  private[ml] object SharedReadWrite {
+
+    import org.json4s.JsonDSL._
+
+    /** Check that all stages are Writable */
+    def validateStages(stages: Array[PipelineStage]): Unit = {
+      stages.foreach {
+        case stage: Writable => // good
+        case other =>
+          throw new UnsupportedOperationException("Pipeline write will fail on this Pipeline" +
+            s" because it contains a stage which does not implement Writable. Non-Writable stage:" +
+            s" ${other.uid} of type ${other.getClass}")
+      }
+    }
+
+    /**
+     * Save metadata and stages for a [[Pipeline]] or [[PipelineModel]]
+     *  - save metadata to path/metadata
+     *  - save stages to stages/IDX_UID
+     */
+    def saveImpl(
+        instance: Params,
+        stages: Array[PipelineStage],
+        sc: SparkContext,
+        path: String): Unit = {
+      // Copied and edited from DefaultParamsWriter.saveMetadata
+      // TODO: modify DefaultParamsWriter.saveMetadata to avoid duplication
+      val uid = instance.uid
+      val cls = instance.getClass.getName
+      val stageUids = stages.map(_.uid)
+      val jsonParams = List("stageUids" -> parse(compact(render(stageUids.toSeq))))
+      val metadata = ("class" -> cls) ~
+        ("timestamp" -> System.currentTimeMillis()) ~
+        ("sparkVersion" -> sc.version) ~
+        ("uid" -> uid) ~
+        ("paramMap" -> jsonParams)
+      val metadataPath = new Path(path, "metadata").toString
+      val metadataJson = compact(render(metadata))
+      sc.parallelize(Seq(metadataJson), 1).saveAsTextFile(metadataPath)
+
+      // Save stages
+      val stagesDir = new Path(path, "stages").toString
+      stages.zipWithIndex.foreach { case (stage: Writable, idx: Int) =>
+        stage.write.save(getStagePath(stage.uid, idx, stages.length, stagesDir))
+      }
+    }
+
+    /**
+     * Load metadata and stages for a [[Pipeline]] or [[PipelineModel]]
+     * @return  (UID, list of stages)
+     */
+    def load(
+        expectedClassName: String,
+        sc: SparkContext,
+        path: String): (String, Array[PipelineStage]) = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, expectedClassName)
+
+      implicit val format = DefaultFormats
+      val stagesDir = new Path(path, "stages").toString
+      val stageUids: Array[String] = metadata.params match {
+        case JObject(pairs) =>
+          if (pairs.length != 1) {
+            // Should not happen unless file is corrupted or we have a bug.
+            throw new RuntimeException(
+              s"Pipeline read expected 1 Param (stageUids), but found ${pairs.length}.")
+          }
+          pairs.head match {
+            case ("stageUids", jsonValue) =>
+              jsonValue.extract[Seq[String]].toArray
+            case (paramName, jsonValue) =>
+              // Should not happen unless file is corrupted or we have a bug.
+              throw new RuntimeException(s"Pipeline read encountered unexpected Param $paramName" +
+                s" in metadata: ${metadata.metadataStr}")
+          }
+        case _ =>
+          throw new IllegalArgumentException(
+            s"Cannot recognize JSON metadata: ${metadata.metadataStr}.")
+      }
+      val stages: Array[PipelineStage] = stageUids.zipWithIndex.map { case (stageUid, idx) =>
+        val stagePath = SharedReadWrite.getStagePath(stageUid, idx, stageUids.length, stagesDir)
+        val stageMetadata = DefaultParamsReader.loadMetadata(stagePath, sc)
+        val cls = Utils.classForName(stageMetadata.className)
+        cls.getMethod("read").invoke(null).asInstanceOf[Reader[PipelineStage]].load(stagePath)
+      }
+      (metadata.uid, stages)
+    }
+
+    /** Get path for saving the given stage. */
+    def getStagePath(stageUid: String, stageIdx: Int, numStages: Int, stagesDir: String): String = {
+      val stageIdxDigits = numStages.toString.length
+      val idxFormat = s"%0${stageIdxDigits}d"
+      val stageDir = idxFormat.format(stageIdx) + "_" + stageUid
+      new Path(stagesDir, stageDir).toString
+    }
+  }
 }
 
 /**
@@ -176,7 +308,7 @@ class Pipeline(override val uid: String) extends Estimator[PipelineModel] {
 class PipelineModel private[ml] (
     override val uid: String,
     val stages: Array[Transformer])
-  extends Model[PipelineModel] with Logging {
+  extends Model[PipelineModel] with Writable with Logging {
 
   /** A Java/Python-friendly auxiliary constructor. */
   private[ml] def this(uid: String, stages: ju.List[Transformer]) = {
@@ -200,4 +332,39 @@ class PipelineModel private[ml] (
   override def copy(extra: ParamMap): PipelineModel = {
     new PipelineModel(uid, stages.map(_.copy(extra))).setParent(parent)
   }
+
+  override def write: Writer = new PipelineModel.PipelineModelWriter(this)
+}
+
+object PipelineModel extends Readable[PipelineModel] {
+
+  import Pipeline.SharedReadWrite
+
+  override def read: Reader[PipelineModel] = new PipelineModelReader
+
+  override def load(path: String): PipelineModel = read.load(path)
+
+  private[ml] class PipelineModelWriter(instance: PipelineModel) extends Writer {
+
+    SharedReadWrite.validateStages(instance.stages.asInstanceOf[Array[PipelineStage]])
+
+    override protected def saveImpl(path: String): Unit = SharedReadWrite.saveImpl(instance,
+      instance.stages.asInstanceOf[Array[PipelineStage]], sc, path)
+  }
+
+  private[ml] class PipelineModelReader extends Reader[PipelineModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = "org.apache.spark.ml.PipelineModel"
+
+    override def load(path: String): PipelineModel = {
+      val (uid: String, stages: Array[PipelineStage]) = SharedReadWrite.load(className, sc, path)
+      val transformers = stages map {
+        case stage: Transformer => stage
+        case other => throw new RuntimeException(s"PipelineModel.read loaded a stage but found it" +
+          s" was not a Transformer.  Bad stage ${other.uid} of type ${other.getClass}")
+      }
+      new PipelineModel(uid, transformers)
+    }
+  }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index ca896ed6106c..3169c9e9af5b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -164,6 +164,8 @@ trait Readable[T] {
 
   /**
    * Reads an ML instance from the input path, a shortcut of `read.load(path)`.
+   *
+   * Note: Implementing classes should override this to be Java-friendly.
    */
   @Since("1.6.0")
   def load(path: String): T = read.load(path)
@@ -190,7 +192,7 @@ private[ml] object DefaultParamsWriter {
    *  - timestamp
    *  - sparkVersion
    *  - uid
-   *  - paramMap
+   *  - paramMap: These must be encodable using [[org.apache.spark.ml.param.Param.jsonEncode()]].
    */
   def saveMetadata(instance: Params, path: String, sc: SparkContext): Unit = {
     val uid = instance.uid
diff --git a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
index 1f2c9b75b617..484026b1ba9a 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
@@ -17,19 +17,25 @@
 
 package org.apache.spark.ml
 
+import java.io.File
+
 import scala.collection.JavaConverters._
 
+import org.apache.hadoop.fs.{FileSystem, Path}
 import org.mockito.Matchers.{any, eq => meq}
 import org.mockito.Mockito.when
 import org.scalatest.mock.MockitoSugar.mock
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.Pipeline.SharedReadWrite
 import org.apache.spark.ml.feature.HashingTF
-import org.apache.spark.ml.param.ParamMap
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.param.{IntParam, ParamMap}
+import org.apache.spark.ml.util._
+import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.DataFrame
+import org.apache.spark.sql.types.StructType
 
-class PipelineSuite extends SparkFunSuite {
+class PipelineSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   abstract class MyModel extends Model[MyModel]
 
@@ -111,4 +117,112 @@ class PipelineSuite extends SparkFunSuite {
     assert(pipelineModel1.uid === "pipeline1")
     assert(pipelineModel1.stages === stages)
   }
+
+  test("Pipeline read/write") {
+    val writableStage = new WritableStage("writableStage").setIntParam(56)
+    val pipeline = new Pipeline().setStages(Array(writableStage))
+
+    val pipeline2 = testDefaultReadWrite(pipeline, testParams = false)
+    assert(pipeline2.getStages.length === 1)
+    assert(pipeline2.getStages(0).isInstanceOf[WritableStage])
+    val writableStage2 = pipeline2.getStages(0).asInstanceOf[WritableStage]
+    assert(writableStage.getIntParam === writableStage2.getIntParam)
+  }
+
+  test("Pipeline read/write with non-Writable stage") {
+    val unWritableStage = new UnWritableStage("unwritableStage")
+    val unWritablePipeline = new Pipeline().setStages(Array(unWritableStage))
+    withClue("Pipeline.write should fail when Pipeline contains non-Writable stage") {
+      intercept[UnsupportedOperationException] {
+        unWritablePipeline.write
+      }
+    }
+  }
+
+  test("PipelineModel read/write") {
+    val writableStage = new WritableStage("writableStage").setIntParam(56)
+    val pipeline =
+      new PipelineModel("pipeline_89329327", Array(writableStage.asInstanceOf[Transformer]))
+
+    val pipeline2 = testDefaultReadWrite(pipeline, testParams = false)
+    assert(pipeline2.stages.length === 1)
+    assert(pipeline2.stages(0).isInstanceOf[WritableStage])
+    val writableStage2 = pipeline2.stages(0).asInstanceOf[WritableStage]
+    assert(writableStage.getIntParam === writableStage2.getIntParam)
+
+    val path = new File(tempDir, pipeline.uid).getPath
+    val stagesDir = new Path(path, "stages").toString
+    val expectedStagePath = SharedReadWrite.getStagePath(writableStage.uid, 0, 1, stagesDir)
+    assert(FileSystem.get(sc.hadoopConfiguration).exists(new Path(expectedStagePath)),
+      s"Expected stage 0 of 1 with uid ${writableStage.uid} in Pipeline with uid ${pipeline.uid}" +
+        s" to be saved to path: $expectedStagePath")
+  }
+
+  test("PipelineModel read/write: getStagePath") {
+    val stageUid = "myStage"
+    val stagesDir = new Path("pipeline", "stages").toString
+    def testStage(stageIdx: Int, numStages: Int, expectedPrefix: String): Unit = {
+      val path = SharedReadWrite.getStagePath(stageUid, stageIdx, numStages, stagesDir)
+      val expected = new Path(stagesDir, expectedPrefix + "_" + stageUid).toString
+      assert(path === expected)
+    }
+    testStage(0, 1, "0")
+    testStage(0, 9, "0")
+    testStage(0, 10, "00")
+    testStage(1, 10, "01")
+    testStage(12, 999, "012")
+  }
+
+  test("PipelineModel read/write with non-Writable stage") {
+    val unWritableStage = new UnWritableStage("unwritableStage")
+    val unWritablePipeline =
+      new PipelineModel("pipeline_328957", Array(unWritableStage.asInstanceOf[Transformer]))
+    withClue("PipelineModel.write should fail when PipelineModel contains non-Writable stage") {
+      intercept[UnsupportedOperationException] {
+        unWritablePipeline.write
+      }
+    }
+  }
+}
+
+
+/** Used to test [[Pipeline]] with [[Writable]] stages */
+class WritableStage(override val uid: String) extends Transformer with Writable {
+
+  final val intParam: IntParam = new IntParam(this, "intParam", "doc")
+
+  def getIntParam: Int = $(intParam)
+
+  def setIntParam(value: Int): this.type = set(intParam, value)
+
+  setDefault(intParam -> 0)
+
+  override def copy(extra: ParamMap): WritableStage = defaultCopy(extra)
+
+  override def write: Writer = new DefaultParamsWriter(this)
+
+  override def transform(dataset: DataFrame): DataFrame = dataset
+
+  override def transformSchema(schema: StructType): StructType = schema
+}
+
+object WritableStage extends Readable[WritableStage] {
+
+  override def read: Reader[WritableStage] = new DefaultParamsReader[WritableStage]
+
+  override def load(path: String): WritableStage = read.load(path)
+}
+
+/** Used to test [[Pipeline]] with non-[[Writable]] stages */
+class UnWritableStage(override val uid: String) extends Transformer {
+
+  final val intParam: IntParam = new IntParam(this, "intParam", "doc")
+
+  setDefault(intParam -> 0)
+
+  override def copy(extra: ParamMap): UnWritableStage = defaultCopy(extra)
+
+  override def transform(dataset: DataFrame): DataFrame = dataset
+
+  override def transformSchema(schema: StructType): StructType = schema
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index cac4bd9aa3ab..c37f0503f133 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -30,10 +30,13 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
   /**
    * Checks "overwrite" option and params.
    * @param instance ML instance to test saving/loading
+   * @param testParams  If true, then test values of Params.  Otherwise, just test overwrite option.
    * @tparam T ML instance type
    * @return  Instance loaded from file
    */
-  def testDefaultReadWrite[T <: Params with Writable](instance: T): T = {
+  def testDefaultReadWrite[T <: Params with Writable](
+      instance: T,
+      testParams: Boolean = true): T = {
     val uid = instance.uid
     val path = new File(tempDir, uid).getPath
 
@@ -46,16 +49,18 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
     val newInstance = loader.load(path)
 
     assert(newInstance.uid === instance.uid)
-    instance.params.foreach { p =>
-      if (instance.isDefined(p)) {
-        (instance.getOrDefault(p), newInstance.getOrDefault(p)) match {
-          case (Array(values), Array(newValues)) =>
-            assert(values === newValues, s"Values do not match on param ${p.name}.")
-          case (value, newValue) =>
-            assert(value === newValue, s"Values do not match on param ${p.name}.")
+    if (testParams) {
+      instance.params.foreach { p =>
+        if (instance.isDefined(p)) {
+          (instance.getOrDefault(p), newInstance.getOrDefault(p)) match {
+            case (Array(values), Array(newValues)) =>
+              assert(values === newValues, s"Values do not match on param ${p.name}.")
+            case (value, newValue) =>
+              assert(value === newValue, s"Values do not match on param ${p.name}.")
+          }
+        } else {
+          assert(!newInstance.isDefined(p), s"Param ${p.name} shouldn't be defined.")
         }
-      } else {
-        assert(!newInstance.isDefined(p), s"Param ${p.name} shouldn't be defined.")
       }
     }
 

From 540bf58f18328c68107d6c616ffd70f3a4640054 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 16 Nov 2015 17:28:11 -0800
Subject: [PATCH 714/896] [SPARK-11617][NETWORK] Fix leak in
 TransportFrameDecoder.

The code was using the wrong API to add data to the internal composite
buffer, causing buffers to leak in certain situations. Use the right
API and enhance the tests to catch memory leaks.

Also, avoid reusing the composite buffers when downstream handlers keep
references to them; this seems to cause a few different issues even though
the ref counting code seems to be correct, so instead pay the cost of copying
a few bytes when that situation happens.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9619 from vanzin/SPARK-11617.
---
 .../network/util/TransportFrameDecoder.java   |  47 ++++--
 .../util/TransportFrameDecoderSuite.java      | 145 +++++++++++++++---
 2 files changed, 151 insertions(+), 41 deletions(-)

diff --git a/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java b/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
index 272ea84e6180..5889562dd970 100644
--- a/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
+++ b/network/common/src/main/java/org/apache/spark/network/util/TransportFrameDecoder.java
@@ -56,32 +56,43 @@ public void channelRead(ChannelHandlerContext ctx, Object data) throws Exception
       buffer = in.alloc().compositeBuffer();
     }
 
-    buffer.writeBytes(in);
+    buffer.addComponent(in).writerIndex(buffer.writerIndex() + in.readableBytes());
 
     while (buffer.isReadable()) {
-      feedInterceptor();
-      if (interceptor != null) {
-        continue;
-      }
+      discardReadBytes();
+      if (!feedInterceptor()) {
+        ByteBuf frame = decodeNext();
+        if (frame == null) {
+          break;
+        }
 
-      ByteBuf frame = decodeNext();
-      if (frame != null) {
         ctx.fireChannelRead(frame);
-      } else {
-        break;
       }
     }
 
-    // We can't discard read sub-buffers if there are other references to the buffer (e.g.
-    // through slices used for framing). This assumes that code that retains references
-    // will call retain() from the thread that called "fireChannelRead()" above, otherwise
-    // ref counting will go awry.
-    if (buffer != null && buffer.refCnt() == 1) {
+    discardReadBytes();
+  }
+
+  private void discardReadBytes() {
+    // If the buffer's been retained by downstream code, then make a copy of the remaining
+    // bytes into a new buffer. Otherwise, just discard stale components.
+    if (buffer.refCnt() > 1) {
+      CompositeByteBuf newBuffer = buffer.alloc().compositeBuffer();
+
+      if (buffer.readableBytes() > 0) {
+        ByteBuf spillBuf = buffer.alloc().buffer(buffer.readableBytes());
+        spillBuf.writeBytes(buffer);
+        newBuffer.addComponent(spillBuf).writerIndex(spillBuf.readableBytes());
+      }
+
+      buffer.release();
+      buffer = newBuffer;
+    } else {
       buffer.discardReadComponents();
     }
   }
 
-  protected ByteBuf decodeNext() throws Exception {
+  private ByteBuf decodeNext() throws Exception {
     if (buffer.readableBytes() < LENGTH_SIZE) {
       return null;
     }
@@ -127,10 +138,14 @@ public void setInterceptor(Interceptor interceptor) {
     this.interceptor = interceptor;
   }
 
-  private void feedInterceptor() throws Exception {
+  /**
+   * @return Whether the interceptor is still active after processing the data.
+   */
+  private boolean feedInterceptor() throws Exception {
     if (interceptor != null && !interceptor.handle(buffer)) {
       interceptor = null;
     }
+    return interceptor != null;
   }
 
   public static interface Interceptor {
diff --git a/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java b/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
index ca74f0a00cf9..19475c21ffce 100644
--- a/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
@@ -18,41 +18,36 @@
 package org.apache.spark.network.util;
 
 import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Random;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import io.netty.channel.ChannelHandlerContext;
+import org.junit.AfterClass;
 import org.junit.Test;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 import static org.junit.Assert.*;
 import static org.mockito.Mockito.*;
 
 public class TransportFrameDecoderSuite {
 
+  private static Random RND = new Random();
+
+  @AfterClass
+  public static void cleanup() {
+    RND = null;
+  }
+
   @Test
   public void testFrameDecoding() throws Exception {
-    Random rnd = new Random();
     TransportFrameDecoder decoder = new TransportFrameDecoder();
-    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
-
-    final int frameCount = 100;
-    ByteBuf data = Unpooled.buffer();
-    try {
-      for (int i = 0; i < frameCount; i++) {
-        byte[] frame = new byte[1024 * (rnd.nextInt(31) + 1)];
-        data.writeLong(frame.length + 8);
-        data.writeBytes(frame);
-      }
-
-      while (data.isReadable()) {
-        int size = rnd.nextInt(16 * 1024) + 256;
-        decoder.channelRead(ctx, data.readSlice(Math.min(data.readableBytes(), size)));
-      }
-
-      verify(ctx, times(frameCount)).fireChannelRead(any(ByteBuf.class));
-    } finally {
-      data.release();
-    }
+    ChannelHandlerContext ctx = mockChannelHandlerContext();
+    ByteBuf data = createAndFeedFrames(100, decoder, ctx);
+    verifyAndCloseDecoder(decoder, ctx, data);
   }
 
   @Test
@@ -60,7 +55,7 @@ public void testInterception() throws Exception {
     final int interceptedReads = 3;
     TransportFrameDecoder decoder = new TransportFrameDecoder();
     TransportFrameDecoder.Interceptor interceptor = spy(new MockInterceptor(interceptedReads));
-    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+    ChannelHandlerContext ctx = mockChannelHandlerContext();
 
     byte[] data = new byte[8];
     ByteBuf len = Unpooled.copyLong(8 + data.length);
@@ -70,16 +65,56 @@ public void testInterception() throws Exception {
       decoder.setInterceptor(interceptor);
       for (int i = 0; i < interceptedReads; i++) {
         decoder.channelRead(ctx, dataBuf);
-        dataBuf.release();
+        assertEquals(0, dataBuf.refCnt());
         dataBuf = Unpooled.wrappedBuffer(data);
       }
       decoder.channelRead(ctx, len);
       decoder.channelRead(ctx, dataBuf);
       verify(interceptor, times(interceptedReads)).handle(any(ByteBuf.class));
       verify(ctx).fireChannelRead(any(ByteBuffer.class));
+      assertEquals(0, len.refCnt());
+      assertEquals(0, dataBuf.refCnt());
     } finally {
-      len.release();
-      dataBuf.release();
+      release(len);
+      release(dataBuf);
+    }
+  }
+
+  @Test
+  public void testRetainedFrames() throws Exception {
+    TransportFrameDecoder decoder = new TransportFrameDecoder();
+
+    final AtomicInteger count = new AtomicInteger();
+    final List<ByteBuf> retained = new ArrayList<>();
+
+    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+    when(ctx.fireChannelRead(any())).thenAnswer(new Answer<Void>() {
+      @Override
+      public Void answer(InvocationOnMock in) {
+        // Retain a few frames but not others.
+        ByteBuf buf = (ByteBuf) in.getArguments()[0];
+        if (count.incrementAndGet() % 2 == 0) {
+          retained.add(buf);
+        } else {
+          buf.release();
+        }
+        return null;
+      }
+    });
+
+    ByteBuf data = createAndFeedFrames(100, decoder, ctx);
+    try {
+      // Verify all retained buffers are readable.
+      for (ByteBuf b : retained) {
+        byte[] tmp = new byte[b.readableBytes()];
+        b.readBytes(tmp);
+        b.release();
+      }
+      verifyAndCloseDecoder(decoder, ctx, data);
+    } finally {
+      for (ByteBuf b : retained) {
+        release(b);
+      }
     }
   }
 
@@ -100,6 +135,47 @@ public void testLargeFrame() throws Exception {
     testInvalidFrame(Integer.MAX_VALUE + 9);
   }
 
+  /**
+   * Creates a number of randomly sized frames and feed them to the given decoder, verifying
+   * that the frames were read.
+   */
+  private ByteBuf createAndFeedFrames(
+      int frameCount,
+      TransportFrameDecoder decoder,
+      ChannelHandlerContext ctx) throws Exception {
+    ByteBuf data = Unpooled.buffer();
+    for (int i = 0; i < frameCount; i++) {
+      byte[] frame = new byte[1024 * (RND.nextInt(31) + 1)];
+      data.writeLong(frame.length + 8);
+      data.writeBytes(frame);
+    }
+
+    try {
+      while (data.isReadable()) {
+        int size = RND.nextInt(4 * 1024) + 256;
+        decoder.channelRead(ctx, data.readSlice(Math.min(data.readableBytes(), size)).retain());
+      }
+
+      verify(ctx, times(frameCount)).fireChannelRead(any(ByteBuf.class));
+    } catch (Exception e) {
+      release(data);
+      throw e;
+    }
+    return data;
+  }
+
+  private void verifyAndCloseDecoder(
+      TransportFrameDecoder decoder,
+      ChannelHandlerContext ctx,
+      ByteBuf data) throws Exception {
+    try {
+      decoder.channelInactive(ctx);
+      assertTrue("There shouldn't be dangling references to the data.", data.release());
+    } finally {
+      release(data);
+    }
+  }
+
   private void testInvalidFrame(long size) throws Exception {
     TransportFrameDecoder decoder = new TransportFrameDecoder();
     ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
@@ -111,6 +187,25 @@ private void testInvalidFrame(long size) throws Exception {
     }
   }
 
+  private ChannelHandlerContext mockChannelHandlerContext() {
+    ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+    when(ctx.fireChannelRead(any())).thenAnswer(new Answer<Void>() {
+      @Override
+      public Void answer(InvocationOnMock in) {
+        ByteBuf buf = (ByteBuf) in.getArguments()[0];
+        buf.release();
+        return null;
+      }
+    });
+    return ctx;
+  }
+
+  private void release(ByteBuf buf) {
+    if (buf.refCnt() > 0) {
+      buf.release(buf.refCnt());
+    }
+  }
+
   private static class MockInterceptor implements TransportFrameDecoder.Interceptor {
 
     private int remainingReads;

From fbad920dbfd6f389dea852cdc159cacb0f4f6997 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Mon, 16 Nov 2015 20:47:46 -0800
Subject: [PATCH 715/896] [SPARK-11768][SPARK-9196][SQL] Support now function
 in SQL (alias for current_timestamp).

This patch adds an alias for current_timestamp (now function).

Also fixes SPARK-9196 to re-enable the test case for current_timestamp.

Author: Reynold Xin <rxin@databricks.com>

Closes #9753 from rxin/SPARK-11768.
---
 .../catalyst/analysis/FunctionRegistry.scala   |  1 +
 .../apache/spark/sql/DateFunctionsSuite.scala  | 18 ++++++++++++------
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
index a8f4d257acd0..f9c04d7ec0b0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala
@@ -244,6 +244,7 @@ object FunctionRegistry {
     expression[AddMonths]("add_months"),
     expression[CurrentDate]("current_date"),
     expression[CurrentTimestamp]("current_timestamp"),
+    expression[CurrentTimestamp]("now"),
     expression[DateDiff]("datediff"),
     expression[DateAdd]("date_add"),
     expression[DateFormatClass]("date_format"),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
index 1266d534cc5b..241cbd011507 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
@@ -38,15 +38,21 @@ class DateFunctionsSuite extends QueryTest with SharedSQLContext {
     assert(d0 <= d1 && d1 <= d2 && d2 <= d3 && d3 - d0 <= 1)
   }
 
-  // This is a bad test. SPARK-9196 will fix it and re-enable it.
-  ignore("function current_timestamp") {
+  test("function current_timestamp and now") {
     val df1 = Seq((1, 2), (3, 1)).toDF("a", "b")
     checkAnswer(df1.select(countDistinct(current_timestamp())), Row(1))
+
     // Execution in one query should return the same value
-    checkAnswer(sql("""SELECT CURRENT_TIMESTAMP() = CURRENT_TIMESTAMP()"""),
-      Row(true))
-    assert(math.abs(sql("""SELECT CURRENT_TIMESTAMP()""").collect().head.getTimestamp(
-      0).getTime - System.currentTimeMillis()) < 5000)
+    checkAnswer(sql("""SELECT CURRENT_TIMESTAMP() = CURRENT_TIMESTAMP()"""), Row(true))
+
+    // Current timestamp should return the current timestamp ...
+    val before = System.currentTimeMillis
+    val got = sql("SELECT CURRENT_TIMESTAMP()").collect().head.getTimestamp(0).getTime
+    val after = System.currentTimeMillis
+    assert(got >= before && got <= after)
+
+    // Now alias
+    checkAnswer(sql("""SELECT CURRENT_TIMESTAMP() = NOW()"""), Row(true))
   }
 
   val sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")

From 75d202073143d5a7f943890d8682b5b0cf9e3092 Mon Sep 17 00:00:00 2001
From: hyukjinkwon <gurwls223@gmail.com>
Date: Tue, 17 Nov 2015 14:35:00 +0800
Subject: [PATCH 716/896] [SPARK-11694][FOLLOW-UP] Clean up imports, use a
 common function for metadata and add a test for FIXED_LEN_BYTE_ARRAY

As discussed https://github.com/apache/spark/pull/9660 https://github.com/apache/spark/pull/9060, I cleaned up unused imports, added a test for fixed-length byte array and used a common function for writing metadata for Parquet.

For the test for fixed-length byte array, I have tested and checked the encoding types with [parquet-tools](https://github.com/Parquet/parquet-mr/tree/master/parquet-tools).

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #9754 from HyukjinKwon/SPARK-11694-followup.
---
 .../test/resources/dec-in-fixed-len.parquet   | Bin 0 -> 460 bytes
 .../datasources/parquet/ParquetIOSuite.scala  |  42 +++++++-----------
 2 files changed, 15 insertions(+), 27 deletions(-)
 create mode 100644 sql/core/src/test/resources/dec-in-fixed-len.parquet

diff --git a/sql/core/src/test/resources/dec-in-fixed-len.parquet b/sql/core/src/test/resources/dec-in-fixed-len.parquet
new file mode 100644
index 0000000000000000000000000000000000000000..6ad37d5639511cdb430f33fa6165eb70cd9034c0
GIT binary patch
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HcmV?d00001

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index a148facd056a..177ab42f7767 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql.execution.datasources.parquet
 
-import java.util.Collections
-
 import org.apache.parquet.column.{Encoding, ParquetProperties}
 
 import scala.collection.JavaConverters._
@@ -33,7 +31,7 @@ import org.apache.parquet.example.data.{Group, GroupWriter}
 import org.apache.parquet.hadoop._
 import org.apache.parquet.hadoop.api.WriteSupport
 import org.apache.parquet.hadoop.api.WriteSupport.WriteContext
-import org.apache.parquet.hadoop.metadata.{CompressionCodecName, FileMetaData, ParquetMetadata}
+import org.apache.parquet.hadoop.metadata.CompressionCodecName
 import org.apache.parquet.io.api.RecordConsumer
 import org.apache.parquet.schema.{MessageType, MessageTypeParser}
 
@@ -243,15 +241,9 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       """.stripMargin)
 
     withTempPath { location =>
-      val extraMetadata = Map.empty[String, String].asJava
-      val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, "Spark")
       val path = new Path(location.getCanonicalPath)
-      val footer = List(
-        new Footer(path, new ParquetMetadata(fileMetadata, Collections.emptyList()))
-      ).asJava
-
-      ParquetFileWriter.writeMetadataFile(sparkContext.hadoopConfiguration, path, footer)
-
+      val conf = sparkContext.hadoopConfiguration
+      writeMetadata(parquetSchema, path, conf)
       val errorMessage = intercept[Throwable] {
         sqlContext.read.parquet(path.toString).printSchema()
       }.toString
@@ -267,20 +259,14 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
         |}
       """.stripMargin)
 
+    val expectedSparkTypes = Seq(StringType, BinaryType)
+
     withTempPath { location =>
-      val extraMetadata = Map.empty[String, String].asJava
-      val fileMetadata = new FileMetaData(parquetSchema, extraMetadata, "Spark")
       val path = new Path(location.getCanonicalPath)
-      val footer = List(
-        new Footer(path, new ParquetMetadata(fileMetadata, Collections.emptyList()))
-      ).asJava
-
-      ParquetFileWriter.writeMetadataFile(sparkContext.hadoopConfiguration, path, footer)
-
-      val jsonDataType = sqlContext.read.parquet(path.toString).schema(0).dataType
-      assert(jsonDataType === StringType)
-      val bsonDataType = sqlContext.read.parquet(path.toString).schema(1).dataType
-      assert(bsonDataType === BinaryType)
+      val conf = sparkContext.hadoopConfiguration
+      writeMetadata(parquetSchema, path, conf)
+      val sparkTypes = sqlContext.read.parquet(path.toString).schema.map(_.dataType)
+      assert(sparkTypes === expectedSparkTypes)
     }
   }
 
@@ -607,10 +593,12 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
       sqlContext.range(1 << 4).select('id % 10 cast DecimalType(10, 2) as 'i64_dec))
   }
 
-  // TODO Adds test case for reading dictionary encoded decimals written as `FIXED_LEN_BYTE_ARRAY`
-  // The Parquet writer version Spark 1.6 and prior versions use is `PARQUET_1_0`, which doesn't
-  // provide dictionary encoding support for `FIXED_LEN_BYTE_ARRAY`.  Should add a test here once
-  // we upgrade to `PARQUET_2_0`.
+  test("read dictionary encoded decimals written as FIXED_LEN_BYTE_ARRAY") {
+    checkAnswer(
+      // Decimal column in this file is encoded using plain dictionary
+      readResourceParquetFile("dec-in-fixed-len.parquet"),
+      sqlContext.range(1 << 4).select('id % 10 cast DecimalType(10, 2) as 'fixed_len_dec))
+  }
 }
 
 class JobCommitFailureParquetOutputCommitter(outputPath: Path, context: TaskAttemptContext)

From e01865af0d5ebe11033de46c388c5c583876c187 Mon Sep 17 00:00:00 2001
From: Kevin Yu <qyu@us.ibm.com>
Date: Mon, 16 Nov 2015 22:54:29 -0800
Subject: [PATCH 717/896] [SPARK-11447][SQL] change NullType to StringType
 during binaryComparison between NullType and StringType

During executing PromoteStrings rule, if one side of binaryComparison is StringType and the other side is not StringType, the current code will promote(cast) the StringType to DoubleType, and if the StringType doesn't contain the numbers, it will get null value. So if it is doing <=> (NULL-safe equal) with Null, it will not filter anything, caused the problem reported by this jira.

I proposal to the changes through this PR, can you review my code changes ?

This problem only happen for <=>, other operators works fine.

scala> val filteredDF = df.filter(df("column") > (new Column(Literal(null))))
filteredDF: org.apache.spark.sql.DataFrame = [column: string]

scala> filteredDF.show
+------+
|column|
+------+
+------+

scala> val filteredDF = df.filter(df("column") === (new Column(Literal(null))))
filteredDF: org.apache.spark.sql.DataFrame = [column: string]

scala> filteredDF.show
+------+
|column|
+------+
+------+

scala> df.registerTempTable("DF")

scala> sqlContext.sql("select * from DF where 'column' = NULL")
res27: org.apache.spark.sql.DataFrame = [column: string]

scala> res27.show
+------+
|column|
+------+
+------+

Author: Kevin Yu <qyu@us.ibm.com>

Closes #9720 from kevinyu98/working_on_spark-11447.
---
 .../sql/catalyst/analysis/HiveTypeCoercion.scala      |  6 ++++++
 .../org/apache/spark/sql/ColumnExpressionSuite.scala  | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
index 92188ee54fd2..f90fc3cc1218 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
@@ -281,6 +281,12 @@ object HiveTypeCoercion {
       case p @ BinaryComparison(left @ DateType(), right @ TimestampType()) =>
         p.makeCopy(Array(Cast(left, StringType), Cast(right, StringType)))
 
+      // Checking NullType
+      case p @ BinaryComparison(left @ StringType(), right @ NullType()) =>
+        p.makeCopy(Array(left, Literal.create(null, StringType)))
+      case p @ BinaryComparison(left @ NullType(), right @ StringType()) =>
+        p.makeCopy(Array(Literal.create(null, StringType), right))
+
       case p @ BinaryComparison(left @ StringType(), right) if right.dataType != StringType =>
         p.makeCopy(Array(Cast(left, DoubleType), right))
       case p @ BinaryComparison(left, right @ StringType()) if left.dataType != StringType =>
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
index 3eae3f6d8506..38c0eb589f96 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/ColumnExpressionSuite.scala
@@ -368,6 +368,17 @@ class ColumnExpressionSuite extends QueryTest with SharedSQLContext {
     checkAnswer(
       nullData.filter($"a" <=> $"b"),
       Row(1, 1) :: Row(null, null) :: Nil)
+
+    val nullData2 = sqlContext.createDataFrame(sparkContext.parallelize(
+        Row("abc") ::
+        Row(null)  ::
+        Row("xyz") :: Nil),
+        StructType(Seq(StructField("a", StringType, true))))
+
+    checkAnswer(
+      nullData2.filter($"a" <=> null),
+      Row(null) :: Nil)
+
   }
 
   test(">") {

From d79d8b08ff69b30b02fe87839e695e29bfea5ace Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Mon, 16 Nov 2015 23:16:17 -0800
Subject: [PATCH 718/896] [MINOR] [SQL] Fix randomly generated ArrayData in
 RowEncoderSuite

The randomly generated ArrayData used for the UDT `ExamplePoint` in `RowEncoderSuite` sometimes doesn't have enough elements. In this case, this test will fail. This patch is to fix it.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9757 from viirya/fix-randomgenerated-udt.
---
 .../spark/sql/catalyst/encoders/RowEncoderSuite.scala    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
index c868ddec1bab..46c6e0d98d34 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+import scala.util.Random
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.{RandomDataGenerator, Row}
 import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayData}
@@ -59,7 +61,12 @@ class ExamplePointUDT extends UserDefinedType[ExamplePoint] {
   override def deserialize(datum: Any): ExamplePoint = {
     datum match {
       case values: ArrayData =>
-        new ExamplePoint(values.getDouble(0), values.getDouble(1))
+        if (values.numElements() > 1) {
+          new ExamplePoint(values.getDouble(0), values.getDouble(1))
+        } else {
+          val random = new Random()
+          new ExamplePoint(random.nextDouble(), random.nextDouble())
+        }
     }
   }
 

From fa13301ae440c4c9594280f236bcca11b62fdd29 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Tue, 17 Nov 2015 18:11:08 +0800
Subject: [PATCH 719/896] [SPARK-11191][SQL][FOLLOW-UP] Cleans up unnecessary
 anonymous HiveFunctionRegistry

According to discussion in PR #9664, the anonymous `HiveFunctionRegistry` in `HiveContext` can be removed now.

Author: Cheng Lian <lian@databricks.com>

Closes #9737 from liancheng/spark-11191.follow-up.
---
 .../scala/org/apache/spark/sql/hive/HiveContext.scala  | 10 +---------
 .../scala/org/apache/spark/sql/hive/hiveUDFs.scala     |  7 +++++--
 2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 0c473799cc99..2004f24ad26c 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -454,15 +454,7 @@ class HiveContext private[hive](
   // Note that HiveUDFs will be overridden by functions registered in this context.
   @transient
   override protected[sql] lazy val functionRegistry: FunctionRegistry =
-    new HiveFunctionRegistry(FunctionRegistry.builtin.copy(), this) {
-      override def lookupFunction(name: String, children: Seq[Expression]): Expression = {
-        // Hive Registry need current database to lookup function
-        // TODO: the current database of executionHive should be consistent with metadataHive
-        executionHive.withHiveState {
-          super.lookupFunction(name, children)
-        }
-      }
-    }
+    new HiveFunctionRegistry(FunctionRegistry.builtin.copy(), this.executionHive)
 
   // The Hive UDF current_database() is foldable, will be evaluated by optimizer, but the optimizer
   // can't access the SessionState of metadataHive.
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
index e6fe2ad5f23b..2e8c026259ef 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/hiveUDFs.scala
@@ -43,16 +43,19 @@ import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules.Rule
 import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.hive.HiveShim._
+import org.apache.spark.sql.hive.client.ClientWrapper
 import org.apache.spark.sql.types._
 
 
 private[hive] class HiveFunctionRegistry(
     underlying: analysis.FunctionRegistry,
-    hiveContext: HiveContext)
+    executionHive: ClientWrapper)
   extends analysis.FunctionRegistry with HiveInspectors {
 
   def getFunctionInfo(name: String): FunctionInfo = {
-    hiveContext.executionHive.withHiveState {
+    // Hive Registry need current database to lookup function
+    // TODO: the current database of executionHive should be consistent with metadataHive
+    executionHive.withHiveState {
       FunctionRegistry.getFunctionInfo(name)
     }
   }

From 7276fa9aa9d2eccb6aebd5c690ac334699142f1e Mon Sep 17 00:00:00 2001
From: "yangping.wu" <wyphao.2007@163.com>
Date: Tue, 17 Nov 2015 14:11:34 +0000
Subject: [PATCH 720/896] [SPARK-11751] Doc describe error in the "Spark
 Streaming Programming Guide" page

In the **[Task Launching Overheads](http://spark.apache.org/docs/latest/streaming-programming-guide.html#task-launching-overheads)** section,
>Task Serialization: Using Kryo serialization for serializing tasks can reduce the task sizes, and therefore reduce the time taken to send them to the slaves.

as we known **Task Serialization** is configuration by **spark.closure.serializer** parameter, but currently only the Java serializer is supported. If we set **spark.closure.serializer** to **org.apache.spark.serializer.KryoSerializer**, then this will throw a exception.

Author: yangping.wu <wyphao.2007@163.com>

Closes #9734 from 397090770/397090770-patch-1.
---
 docs/streaming-programming-guide.md | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/docs/streaming-programming-guide.md b/docs/streaming-programming-guide.md
index e9a27f446a89..96b36b7a7320 100644
--- a/docs/streaming-programming-guide.md
+++ b/docs/streaming-programming-guide.md
@@ -2001,8 +2001,7 @@ If the number of tasks launched per second is high (say, 50 or more per second),
 of sending out tasks to the slaves may be significant and will make it hard to achieve sub-second
 latencies. The overhead can be reduced by the following changes:
 
-* **Task Serialization**: Using Kryo serialization for serializing tasks can reduce the task
-  sizes, and therefore reduce the time taken to send them to the slaves.
+* **Task Serialization**: Using Kryo serialization for serializing tasks can reduce the task sizes, and therefore reduce the time taken to send them to the slaves. This is controlled by the ```spark.closure.serializer``` property. However, at this time, Kryo serialization cannot be enabled for closure serialization. This may be resolved in a future release.
 
 * **Execution mode**: Running Spark in Standalone mode or coarse-grained Mesos mode leads to
   better task launch times than the fine-grained Mesos mode. Please refer to the

From 15cc36b7786e2d9a460bf565893236edd2ad993e Mon Sep 17 00:00:00 2001
From: Philipp Hoffmann <mail@philipphoffmann.de>
Date: Tue, 17 Nov 2015 14:13:13 +0000
Subject: [PATCH 721/896] [SPARK-11779][DOCS] Fix reference to deprecated
 MESOS_NATIVE_LIBRARY

MESOS_NATIVE_LIBRARY was renamed in favor of MESOS_NATIVE_JAVA_LIBRARY. This commit fixes the reference in the documentation.

Author: Philipp Hoffmann <mail@philipphoffmann.de>

Closes #9768 from philipphoffmann/patch-2.
---
 docs/running-on-mesos.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index ec5a44d79212..5be208cf3461 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -278,7 +278,7 @@ See the [configuration page](configuration.html) for information on Spark config
     Set the name of the docker image that the Spark executors will run in. The selected
     image must have Spark installed, as well as a compatible version of the Mesos library.
     The installed path of Spark in the image can be specified with <code>spark.mesos.executor.home</code>;
-    the installed path of the Mesos library can be specified with <code>spark.executorEnv.MESOS_NATIVE_LIBRARY</code>.
+    the installed path of the Mesos library can be specified with <code>spark.executorEnv.MESOS_NATIVE_JAVA_LIBRARY</code>.
   </td>
 </tr>
 <tr>

From 6fc2740ebb59aca1aa0ee1e93658a7e4e69de33c Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Tue, 17 Nov 2015 10:01:33 -0800
Subject: [PATCH 722/896] [SPARK-11744][LAUNCHER] Fix print version throw
 exception when using pyspark shell

Exception details can be seen here (https://issues.apache.org/jira/browse/SPARK-11744).

Author: jerryshao <sshao@hortonworks.com>

Closes #9721 from jerryshao/SPARK-11744.
---
 .../launcher/SparkSubmitCommandBuilder.java     | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
index 39b46e0db8cc..312df0b269f3 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/SparkSubmitCommandBuilder.java
@@ -77,7 +77,7 @@ class SparkSubmitCommandBuilder extends AbstractCommandBuilder {
   }
 
   final List<String> sparkArgs;
-  private final boolean printHelp;
+  private final boolean printInfo;
 
   /**
    * Controls whether mixing spark-submit arguments with app arguments is allowed. This is needed
@@ -88,7 +88,7 @@ class SparkSubmitCommandBuilder extends AbstractCommandBuilder {
 
   SparkSubmitCommandBuilder() {
     this.sparkArgs = new ArrayList<String>();
-    this.printHelp = false;
+    this.printInfo = false;
   }
 
   SparkSubmitCommandBuilder(List<String> args) {
@@ -108,14 +108,14 @@ class SparkSubmitCommandBuilder extends AbstractCommandBuilder {
 
     OptionParser parser = new OptionParser();
     parser.parse(submitArgs);
-    this.printHelp = parser.helpRequested;
+    this.printInfo = parser.infoRequested;
   }
 
   @Override
   public List<String> buildCommand(Map<String, String> env) throws IOException {
-    if (PYSPARK_SHELL_RESOURCE.equals(appResource) && !printHelp) {
+    if (PYSPARK_SHELL_RESOURCE.equals(appResource) && !printInfo) {
       return buildPySparkShellCommand(env);
-    } else if (SPARKR_SHELL_RESOURCE.equals(appResource) && !printHelp) {
+    } else if (SPARKR_SHELL_RESOURCE.equals(appResource) && !printInfo) {
       return buildSparkRCommand(env);
     } else {
       return buildSparkSubmitCommand(env);
@@ -311,7 +311,7 @@ private boolean isThriftServer(String mainClass) {
 
   private class OptionParser extends SparkSubmitOptionParser {
 
-    boolean helpRequested = false;
+    boolean infoRequested = false;
 
     @Override
     protected boolean handle(String opt, String value) {
@@ -344,7 +344,10 @@ protected boolean handle(String opt, String value) {
           appResource = specialClasses.get(value);
         }
       } else if (opt.equals(HELP) || opt.equals(USAGE_ERROR)) {
-        helpRequested = true;
+        infoRequested = true;
+        sparkArgs.add(opt);
+      } else if (opt.equals(VERSION)) {
+        infoRequested = true;
         sparkArgs.add(opt);
       } else {
         sparkArgs.add(opt);

From cc567b6634c3142125526f4875795c1b1e862838 Mon Sep 17 00:00:00 2001
From: Chris Bannister <chris.bannister@swiftkey.com>
Date: Tue, 17 Nov 2015 10:03:46 -0800
Subject: [PATCH 723/896] [SPARK-11695][CORE] Set s3a credentials

Set s3a credentials when creating a new default hadoop configuration.

Author: Chris Bannister <chris.bannister@swiftkey.com>

Closes #9663 from Zariel/set-s3a-creds.
---
 .../org/apache/spark/deploy/SparkHadoopUtil.scala   | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala b/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
index d606b80c03c9..59e90564b351 100644
--- a/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/SparkHadoopUtil.scala
@@ -92,10 +92,15 @@ class SparkHadoopUtil extends Logging {
       // Explicitly check for S3 environment variables
       if (System.getenv("AWS_ACCESS_KEY_ID") != null &&
           System.getenv("AWS_SECRET_ACCESS_KEY") != null) {
-        hadoopConf.set("fs.s3.awsAccessKeyId", System.getenv("AWS_ACCESS_KEY_ID"))
-        hadoopConf.set("fs.s3n.awsAccessKeyId", System.getenv("AWS_ACCESS_KEY_ID"))
-        hadoopConf.set("fs.s3.awsSecretAccessKey", System.getenv("AWS_SECRET_ACCESS_KEY"))
-        hadoopConf.set("fs.s3n.awsSecretAccessKey", System.getenv("AWS_SECRET_ACCESS_KEY"))
+        val keyId = System.getenv("AWS_ACCESS_KEY_ID")
+        val accessKey = System.getenv("AWS_SECRET_ACCESS_KEY")
+
+        hadoopConf.set("fs.s3.awsAccessKeyId", keyId)
+        hadoopConf.set("fs.s3n.awsAccessKeyId", keyId)
+        hadoopConf.set("fs.s3a.access.key", keyId)
+        hadoopConf.set("fs.s3.awsSecretAccessKey", accessKey)
+        hadoopConf.set("fs.s3n.awsSecretAccessKey", accessKey)
+        hadoopConf.set("fs.s3a.secret.key", accessKey)
       }
       // Copy any "spark.hadoop.foo=bar" system properties into conf as "foo=bar"
       conf.getAll.foreach { case (key, value) =>

From 21fac5434174389e8b83a2f11341fa7c9e360bfd Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 17 Nov 2015 10:17:16 -0800
Subject: [PATCH 724/896] [SPARK-11766][MLLIB] add toJson/fromJson to
 Vector/Vectors

This is to support JSON serialization of Param[Vector] in the pipeline API. It could be used for other purposes too. The schema is the same as `VectorUDT`. jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9751 from mengxr/SPARK-11766.
---
 .../apache/spark/mllib/linalg/Vectors.scala   | 45 +++++++++++++++++++
 .../spark/mllib/linalg/VectorsSuite.scala     | 17 +++++++
 project/MimaExcludes.scala                    |  4 ++
 3 files changed, 66 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
index bd9badc03c34..4dcf351df43f 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
@@ -24,6 +24,9 @@ import scala.annotation.varargs
 import scala.collection.JavaConverters._
 
 import breeze.linalg.{DenseVector => BDV, SparseVector => BSV, Vector => BV}
+import org.json4s.DefaultFormats
+import org.json4s.JsonDSL._
+import org.json4s.jackson.JsonMethods.{compact, render, parse => parseJson}
 
 import org.apache.spark.SparkException
 import org.apache.spark.annotation.{AlphaComponent, Since}
@@ -171,6 +174,12 @@ sealed trait Vector extends Serializable {
    */
   @Since("1.5.0")
   def argmax: Int
+
+  /**
+   * Converts the vector to a JSON string.
+   */
+  @Since("1.6.0")
+  def toJson: String
 }
 
 /**
@@ -339,6 +348,27 @@ object Vectors {
     parseNumeric(NumericParser.parse(s))
   }
 
+  /**
+   * Parses the JSON representation of a vector into a [[Vector]].
+   */
+  @Since("1.6.0")
+  def fromJson(json: String): Vector = {
+    implicit val formats = DefaultFormats
+    val jValue = parseJson(json)
+    (jValue \ "type").extract[Int] match {
+      case 0 => // sparse
+        val size = (jValue \ "size").extract[Int]
+        val indices = (jValue \ "indices").extract[Seq[Int]].toArray
+        val values = (jValue \ "values").extract[Seq[Double]].toArray
+        sparse(size, indices, values)
+      case 1 => // dense
+        val values = (jValue \ "values").extract[Seq[Double]].toArray
+        dense(values)
+      case _ =>
+        throw new IllegalArgumentException(s"Cannot parse $json into a vector.")
+    }
+  }
+
   private[mllib] def parseNumeric(any: Any): Vector = {
     any match {
       case values: Array[Double] =>
@@ -650,6 +680,12 @@ class DenseVector @Since("1.0.0") (
       maxIdx
     }
   }
+
+  @Since("1.6.0")
+  override def toJson: String = {
+    val jValue = ("type" -> 1) ~ ("values" -> values.toSeq)
+    compact(render(jValue))
+  }
 }
 
 @Since("1.3.0")
@@ -837,6 +873,15 @@ class SparseVector @Since("1.0.0") (
     }.unzip
     new SparseVector(selectedIndices.length, sliceInds.toArray, sliceVals.toArray)
   }
+
+  @Since("1.6.0")
+  override def toJson: String = {
+    val jValue = ("type" -> 0) ~
+      ("size" -> size) ~
+      ("indices" -> indices.toSeq) ~
+      ("values" -> values.toSeq)
+    compact(render(jValue))
+  }
 }
 
 @Since("1.3.0")
diff --git a/mllib/src/test/scala/org/apache/spark/mllib/linalg/VectorsSuite.scala b/mllib/src/test/scala/org/apache/spark/mllib/linalg/VectorsSuite.scala
index 6508ddeba420..f895e2a8e4af 100644
--- a/mllib/src/test/scala/org/apache/spark/mllib/linalg/VectorsSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/mllib/linalg/VectorsSuite.scala
@@ -20,6 +20,7 @@ package org.apache.spark.mllib.linalg
 import scala.util.Random
 
 import breeze.linalg.{DenseMatrix => BDM, squaredDistance => breezeSquaredDistance}
+import org.json4s.jackson.JsonMethods.{parse => parseJson}
 
 import org.apache.spark.{Logging, SparkException, SparkFunSuite}
 import org.apache.spark.mllib.util.TestingUtils._
@@ -374,4 +375,20 @@ class VectorsSuite extends SparkFunSuite with Logging {
     assert(v.slice(Array(2, 0)) === new SparseVector(2, Array(0), Array(2.2)))
     assert(v.slice(Array(2, 0, 3, 4)) === new SparseVector(4, Array(0, 3), Array(2.2, 4.4)))
   }
+
+  test("toJson/fromJson") {
+    val sv0 = Vectors.sparse(0, Array.empty, Array.empty)
+    val sv1 = Vectors.sparse(1, Array.empty, Array.empty)
+    val sv2 = Vectors.sparse(2, Array(1), Array(2.0))
+    val dv0 = Vectors.dense(Array.empty[Double])
+    val dv1 = Vectors.dense(1.0)
+    val dv2 = Vectors.dense(0.0, 2.0)
+    for (v <- Seq(sv0, sv1, sv2, dv0, dv1, dv2)) {
+      val json = v.toJson
+      parseJson(json) // `json` should be a valid JSON string
+      val u = Vectors.fromJson(json)
+      assert(u.getClass === v.getClass, "toJson/fromJson should preserve vector types.")
+      assert(u === v, "toJson/fromJson should preserve vector values.")
+    }
+  }
 }
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 50220790d1f8..815951822c1e 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -137,6 +137,10 @@ object MimaExcludes {
       ) ++ Seq (
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.status.api.v1.ApplicationInfo.this")
+      ) ++ Seq(
+        // SPARK-11766 add toJson to Vector
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.mllib.linalg.Vector.toJson")
       )
     case v if v.startsWith("1.5") =>
       Seq(

From e8833dd12c71b23a242727e86684d2d868ff84b3 Mon Sep 17 00:00:00 2001
From: mayuanwen <mayuanwen@qiyi.com>
Date: Tue, 17 Nov 2015 11:15:46 -0800
Subject: [PATCH 725/896] [SPARK-11679][SQL] Invoking method " apply(fields:
 java.util.List[StructField])" in "StructType" gets ClassCastException

In the previous method, fields.toArray will cast java.util.List[StructField] into Array[Object] which can not cast into Array[StructField], thus when invoking this method will throw "java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lorg.apache.spark.sql.types.StructField;"
I directly cast java.util.List[StructField] into Array[StructField]  in this patch.

Author: mayuanwen <mayuanwen@qiyi.com>

Closes #9649 from jackieMaKing/Spark-11679.
---
 .../org/apache/spark/sql/types/StructType.scala     |  3 ++-
 .../org/apache/spark/sql/JavaDataFrameSuite.java    | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
index 11fce4beaf55..9778df271ddd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/types/StructType.scala
@@ -328,7 +328,8 @@ object StructType extends AbstractDataType {
   def apply(fields: Seq[StructField]): StructType = StructType(fields.toArray)
 
   def apply(fields: java.util.List[StructField]): StructType = {
-    StructType(fields.toArray.asInstanceOf[Array[StructField]])
+    import scala.collection.JavaConverters._
+    StructType(fields.asScala)
   }
 
   protected[sql] def fromAttributes(attributes: Seq[Attribute]): StructType =
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index d191b50fa802..567bdddece80 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -22,6 +22,7 @@
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
+import java.util.ArrayList;
 
 import scala.collection.JavaConverters;
 import scala.collection.Seq;
@@ -209,6 +210,18 @@ public void testCreateDataFromFromList() {
     Assert.assertEquals(1, result.length);
   }
 
+  @Test
+  public void testCreateStructTypeFromList(){
+    List<StructField> fields1 = new ArrayList<>();
+    fields1.add(new StructField("id", DataTypes.StringType, true, Metadata.empty()));
+    StructType schema1 = StructType$.MODULE$.apply(fields1);
+    Assert.assertEquals(0, schema1.fieldIndex("id"));
+
+    List<StructField> fields2 = Arrays.asList(new StructField("id", DataTypes.StringType, true, Metadata.empty()));
+    StructType schema2 = StructType$.MODULE$.apply(fields2);
+    Assert.assertEquals(0, schema2.fieldIndex("id"));
+  }
+
   private static final Comparator<Row> crosstabRowComparator = new Comparator<Row>() {
     @Override
     public int compare(Row row1, Row row2) {

From 7b1407c7b95c43299a30e891748824c4bc47e43b Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Tue, 17 Nov 2015 11:17:52 -0800
Subject: [PATCH 726/896] [SPARK-11089][SQL] Adds option for disabling
 multi-session in Thrift server

This PR adds a new option `spark.sql.hive.thriftServer.singleSession` for disabling multi-session support in the Thrift server.

Note that this option is added as a Spark configuration (retrieved from `SparkConf`) rather than Spark SQL configuration (retrieved from `SQLConf`). This is because all SQL configurations are session-ized. Since multi-session support is by default on, no JDBC connection can modify global configurations like the newly added one.

Author: Cheng Lian <lian@databricks.com>

Closes #9740 from liancheng/spark-11089.single-session-option.
---
 docs/sql-programming-guide.md                 | 14 +++++
 .../thriftserver/SparkSQLSessionManager.scala |  6 ++-
 .../HiveThriftServer2Suites.scala             | 51 ++++++++++++++++++-
 .../apache/spark/sql/hive/HiveContext.scala   |  3 ++
 4 files changed, 72 insertions(+), 2 deletions(-)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index 6e02d6564b00..e347754055e7 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -2051,6 +2051,20 @@ options.
 
 # Migration Guide
 
+## Upgrading From Spark SQL 1.5 to 1.6
+
+ - From Spark 1.6, by default the Thrift server runs in multi-session mode.  Which means each JDBC/ODBC
+   connection owns a copy of their own SQL configuration and temporary function registry.  Cached
+   tables are still shared though.  If you prefer to run the Thrift server in the old single-session
+   mode, please set option `spark.sql.hive.thriftServer.singleSession` to `true`.  You may either add
+   this option to `spark-defaults.conf`, or pass it to `start-thriftserver.sh` via `--conf`:
+
+   {% highlight bash %}
+   ./sbin/start-thriftserver.sh \
+     --conf spark.sql.hive.thriftServer.singleSession=true \
+     ...
+   {% endhighlight %}
+
 ## Upgrading From Spark SQL 1.4 to 1.5
 
  - Optimized execution using manually managed memory (Tungsten) is now enabled by default, along with
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
index 33aaead3fbf9..af4fcdf021bd 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
@@ -66,7 +66,11 @@ private[hive] class SparkSQLSessionManager(hiveServer: HiveServer2, hiveContext:
     val session = super.getSession(sessionHandle)
     HiveThriftServer2.listener.onSessionCreated(
       session.getIpAddress, sessionHandle.getSessionId.toString, session.getUsername)
-    val ctx = hiveContext.newSession()
+    val ctx = if (hiveContext.hiveThriftServerSingleSession) {
+      hiveContext
+    } else {
+      hiveContext.newSession()
+    }
     ctx.setConf("spark.sql.hive.version", HiveContext.hiveExecutionVersion)
     sparkSqlOperationManager.sessionToContexts += sessionHandle -> ctx
     sessionHandle
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index eb1895f263d7..1dd898aa3835 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -41,7 +41,6 @@ import org.apache.thrift.transport.TSocket
 import org.scalatest.BeforeAndAfterAll
 
 import org.apache.spark.sql.hive.HiveContext
-import org.apache.spark.sql.hive.test.TestHive
 import org.apache.spark.sql.test.ProcessTestUtils.ProcessOutputCapturer
 import org.apache.spark.util.Utils
 import org.apache.spark.{Logging, SparkFunSuite}
@@ -510,6 +509,53 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
   }
 }
 
+class SingleSessionSuite extends HiveThriftJdbcTest {
+  override def mode: ServerMode.Value = ServerMode.binary
+
+  override protected def extraConf: Seq[String] =
+    "--conf spark.sql.hive.thriftServer.singleSession=true" :: Nil
+
+  test("test single session") {
+    withMultipleConnectionJdbcStatement(
+      { statement =>
+        val jarPath = "../hive/src/test/resources/TestUDTF.jar"
+        val jarURL = s"file://${System.getProperty("user.dir")}/$jarPath"
+
+        // Configurations and temporary functions added in this session should be visible to all
+        // the other sessions.
+        Seq(
+          "SET foo=bar",
+          s"ADD JAR $jarURL",
+          s"""CREATE TEMPORARY FUNCTION udtf_count2
+              |AS 'org.apache.spark.sql.hive.execution.GenericUDTFCount2'
+           """.stripMargin
+        ).foreach(statement.execute)
+      },
+
+      { statement =>
+        val rs1 = statement.executeQuery("SET foo")
+
+        assert(rs1.next())
+        assert(rs1.getString(1) === "foo")
+        assert(rs1.getString(2) === "bar")
+
+        val rs2 = statement.executeQuery("DESCRIBE FUNCTION udtf_count2")
+
+        assert(rs2.next())
+        assert(rs2.getString(1) === "Function: udtf_count2")
+
+        assert(rs2.next())
+        assertResult("Class: org.apache.spark.sql.hive.execution.GenericUDTFCount2") {
+          rs2.getString(1)
+        }
+
+        assert(rs2.next())
+        assert(rs2.getString(1) === "Usage: To be added.")
+      }
+    )
+  }
+}
+
 class HiveThriftHttpServerSuite extends HiveThriftJdbcTest {
   override def mode: ServerMode.Value = ServerMode.http
 
@@ -600,6 +646,8 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
   private var logTailingProcess: Process = _
   private var diagnosisBuffer: ArrayBuffer[String] = ArrayBuffer.empty[String]
 
+  protected def extraConf: Seq[String] = Nil
+
   protected def serverStartCommand(port: Int) = {
     val portConf = if (mode == ServerMode.binary) {
       ConfVars.HIVE_SERVER2_THRIFT_PORT
@@ -635,6 +683,7 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
        |  --driver-class-path $driverClassPath
        |  --driver-java-options -Dlog4j.debug
        |  --conf spark.ui.enabled=false
+       |  ${extraConf.mkString("\n")}
      """.stripMargin.split("\\s+").toSeq
   }
 
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index 2004f24ad26c..c0bb5af7d5c8 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -190,6 +190,9 @@ class HiveContext private[hive](
    */
   protected[hive] def hiveThriftServerAsync: Boolean = getConf(HIVE_THRIFT_SERVER_ASYNC)
 
+  protected[hive] def hiveThriftServerSingleSession: Boolean =
+    sc.conf.get("spark.sql.hive.thriftServer.singleSession", "false").toBoolean
+
   @transient
   protected[sql] lazy val substitutor = new VariableSubstitution()
 

From 0158ff7737d10e68be2e289533241da96b496e89 Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Tue, 17 Nov 2015 11:23:54 -0800
Subject: [PATCH 727/896] [SPARK-8658][SQL][FOLLOW-UP] AttributeReference's
 equals method compares all the members

Based on the comment of cloud-fan in https://github.com/apache/spark/pull/9216, update the AttributeReference's hashCode function by including the hashCode of the other attributes including name, nullable and qualifiers.

Here, I am not 100% sure if we should include name in the hashCode calculation, since the original hashCode calculation does not include it.

marmbrus cloud-fan Please review if the changes are good.

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9761 from gatorsmile/hashCodeNamedExpression.
---
 .../spark/sql/catalyst/expressions/namedExpressions.scala   | 5 ++++-
 .../expressions/SubexpressionEliminationSuite.scala         | 6 +++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index e3daddace241..00b7970bd16c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -212,9 +212,12 @@ case class AttributeReference(
   override def hashCode: Int = {
     // See http://stackoverflow.com/questions/113511/hash-code-implementation
     var h = 17
-    h = h * 37 + exprId.hashCode()
+    h = h * 37 + name.hashCode()
     h = h * 37 + dataType.hashCode()
+    h = h * 37 + nullable.hashCode()
     h = h * 37 + metadata.hashCode()
+    h = h * 37 + exprId.hashCode()
+    h = h * 37 + qualifiers.hashCode()
     h
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
index 9de066e99d63..a61297b2c039 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/SubexpressionEliminationSuite.scala
@@ -25,14 +25,18 @@ class SubexpressionEliminationSuite extends SparkFunSuite {
     val a: AttributeReference = AttributeReference("name", IntegerType)()
     val b1 = a.withName("name2").withExprId(id)
     val b2 = a.withExprId(id)
+    val b3 = a.withQualifiers("qualifierName" :: Nil)
 
     assert(b1 != b2)
     assert(a != b1)
     assert(b1.semanticEquals(b2))
     assert(!b1.semanticEquals(a))
     assert(a.hashCode != b1.hashCode)
-    assert(b1.hashCode == b2.hashCode)
+    assert(b1.hashCode != b2.hashCode)
     assert(b1.semanticHash() == b2.semanticHash())
+    assert(a != b3)
+    assert(a.hashCode != b3.hashCode)
+    assert(a.semanticEquals(b3))
   }
 
   test("Expression Equivalence - basic") {

From d9251496640a77568a1e9ed5045ce2dfba4b437b Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 17 Nov 2015 11:29:02 -0800
Subject: [PATCH 728/896] [SPARK-10186][SQL] support postgre array type in
 JDBCRDD

Add ARRAY support to `PostgresDialect`.

Nested ARRAY is not allowed for now because it's hard to get the array dimension info. See http://stackoverflow.com/questions/16619113/how-to-get-array-base-type-in-postgres-via-jdbc

Thanks for the initial work from mariusvniekerk !

Close https://github.com/apache/spark/pull/9137

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9662 from cloud-fan/postgre.
---
 .../sql/jdbc/PostgresIntegrationSuite.scala   | 44 +++++++----
 .../execution/datasources/jdbc/JDBCRDD.scala  | 76 +++++++++++++-----
 .../datasources/jdbc/JdbcUtils.scala          | 77 ++++++++++---------
 .../apache/spark/sql/jdbc/JdbcDialects.scala  |  2 +-
 .../spark/sql/jdbc/PostgresDialect.scala      | 43 ++++++++---
 5 files changed, 157 insertions(+), 85 deletions(-)

diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
index 164a7f396280..2e18d0a2baa1 100644
--- a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
@@ -20,6 +20,8 @@ package org.apache.spark.sql.jdbc
 import java.sql.Connection
 import java.util.Properties
 
+import org.apache.spark.sql.Column
+import org.apache.spark.sql.catalyst.expressions.{Literal, If}
 import org.apache.spark.tags.DockerTest
 
 @DockerTest
@@ -37,28 +39,32 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
   override def dataPreparation(conn: Connection): Unit = {
     conn.prepareStatement("CREATE DATABASE foo").executeUpdate()
     conn.setCatalog("foo")
-    conn.prepareStatement("CREATE TABLE bar (a text, b integer, c double precision, d bigint, "
-      + "e bit(1), f bit(10), g bytea, h boolean, i inet, j cidr)").executeUpdate()
+    conn.prepareStatement("CREATE TABLE bar (c0 text, c1 integer, c2 double precision, c3 bigint, "
+      + "c4 bit(1), c5 bit(10), c6 bytea, c7 boolean, c8 inet, c9 cidr, "
+      + "c10 integer[], c11 text[])").executeUpdate()
     conn.prepareStatement("INSERT INTO bar VALUES ('hello', 42, 1.25, 123456789012345, B'0', "
-      + "B'1000100101', E'\\\\xDEADBEEF', true, '172.16.0.42', '192.168.0.0/16')").executeUpdate()
+      + "B'1000100101', E'\\\\xDEADBEEF', true, '172.16.0.42', '192.168.0.0/16', "
+      + """'{1, 2}', '{"a", null, "b"}')""").executeUpdate()
   }
 
   test("Type mapping for various types") {
     val df = sqlContext.read.jdbc(jdbcUrl, "bar", new Properties)
     val rows = df.collect()
     assert(rows.length == 1)
-    val types = rows(0).toSeq.map(x => x.getClass.toString)
-    assert(types.length == 10)
-    assert(types(0).equals("class java.lang.String"))
-    assert(types(1).equals("class java.lang.Integer"))
-    assert(types(2).equals("class java.lang.Double"))
-    assert(types(3).equals("class java.lang.Long"))
-    assert(types(4).equals("class java.lang.Boolean"))
-    assert(types(5).equals("class [B"))
-    assert(types(6).equals("class [B"))
-    assert(types(7).equals("class java.lang.Boolean"))
-    assert(types(8).equals("class java.lang.String"))
-    assert(types(9).equals("class java.lang.String"))
+    val types = rows(0).toSeq.map(x => x.getClass)
+    assert(types.length == 12)
+    assert(classOf[String].isAssignableFrom(types(0)))
+    assert(classOf[java.lang.Integer].isAssignableFrom(types(1)))
+    assert(classOf[java.lang.Double].isAssignableFrom(types(2)))
+    assert(classOf[java.lang.Long].isAssignableFrom(types(3)))
+    assert(classOf[java.lang.Boolean].isAssignableFrom(types(4)))
+    assert(classOf[Array[Byte]].isAssignableFrom(types(5)))
+    assert(classOf[Array[Byte]].isAssignableFrom(types(6)))
+    assert(classOf[java.lang.Boolean].isAssignableFrom(types(7)))
+    assert(classOf[String].isAssignableFrom(types(8)))
+    assert(classOf[String].isAssignableFrom(types(9)))
+    assert(classOf[Seq[Int]].isAssignableFrom(types(10)))
+    assert(classOf[Seq[String]].isAssignableFrom(types(11)))
     assert(rows(0).getString(0).equals("hello"))
     assert(rows(0).getInt(1) == 42)
     assert(rows(0).getDouble(2) == 1.25)
@@ -72,11 +78,17 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
     assert(rows(0).getBoolean(7) == true)
     assert(rows(0).getString(8) == "172.16.0.42")
     assert(rows(0).getString(9) == "192.168.0.0/16")
+    assert(rows(0).getSeq(10) == Seq(1, 2))
+    assert(rows(0).getSeq(11) == Seq("a", null, "b"))
   }
 
   test("Basic write test") {
     val df = sqlContext.read.jdbc(jdbcUrl, "bar", new Properties)
-    df.write.jdbc(jdbcUrl, "public.barcopy", new Properties)
     // Test only that it doesn't crash.
+    df.write.jdbc(jdbcUrl, "public.barcopy", new Properties)
+    // Test write null values.
+    df.select(df.queryExecution.analyzed.output.map { a =>
+      Column(If(Literal(true), Literal(null), a)).as(a.name)
+    }: _*).write.jdbc(jdbcUrl, "public.barcopy2", new Properties)
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
index 018a009fbda6..89c850ce238d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRDD.scala
@@ -25,7 +25,7 @@ import org.apache.commons.lang3.StringUtils
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.SpecificMutableRow
-import org.apache.spark.sql.catalyst.util.DateTimeUtils
+import org.apache.spark.sql.catalyst.util.{GenericArrayData, DateTimeUtils}
 import org.apache.spark.sql.jdbc.JdbcDialects
 import org.apache.spark.sql.sources._
 import org.apache.spark.sql.types._
@@ -324,25 +324,27 @@ private[sql] class JDBCRDD(
   case object StringConversion extends JDBCConversion
   case object TimestampConversion extends JDBCConversion
   case object BinaryConversion extends JDBCConversion
+  case class ArrayConversion(elementConversion: JDBCConversion) extends JDBCConversion
 
   /**
    * Maps a StructType to a type tag list.
    */
-  def getConversions(schema: StructType): Array[JDBCConversion] = {
-    schema.fields.map(sf => sf.dataType match {
-      case BooleanType => BooleanConversion
-      case DateType => DateConversion
-      case DecimalType.Fixed(p, s) => DecimalConversion(p, s)
-      case DoubleType => DoubleConversion
-      case FloatType => FloatConversion
-      case IntegerType => IntegerConversion
-      case LongType =>
-        if (sf.metadata.contains("binarylong")) BinaryLongConversion else LongConversion
-      case StringType => StringConversion
-      case TimestampType => TimestampConversion
-      case BinaryType => BinaryConversion
-      case _ => throw new IllegalArgumentException(s"Unsupported field $sf")
-    }).toArray
+  def getConversions(schema: StructType): Array[JDBCConversion] =
+    schema.fields.map(sf => getConversions(sf.dataType, sf.metadata))
+
+  private def getConversions(dt: DataType, metadata: Metadata): JDBCConversion = dt match {
+    case BooleanType => BooleanConversion
+    case DateType => DateConversion
+    case DecimalType.Fixed(p, s) => DecimalConversion(p, s)
+    case DoubleType => DoubleConversion
+    case FloatType => FloatConversion
+    case IntegerType => IntegerConversion
+    case LongType => if (metadata.contains("binarylong")) BinaryLongConversion else LongConversion
+    case StringType => StringConversion
+    case TimestampType => TimestampConversion
+    case BinaryType => BinaryConversion
+    case ArrayType(et, _) => ArrayConversion(getConversions(et, metadata))
+    case _ => throw new IllegalArgumentException(s"Unsupported type ${dt.simpleString}")
   }
 
   /**
@@ -420,16 +422,44 @@ private[sql] class JDBCRDD(
                 mutableRow.update(i, null)
               }
             case BinaryConversion => mutableRow.update(i, rs.getBytes(pos))
-            case BinaryLongConversion => {
+            case BinaryLongConversion =>
               val bytes = rs.getBytes(pos)
               var ans = 0L
               var j = 0
               while (j < bytes.size) {
                 ans = 256 * ans + (255 & bytes(j))
-                j = j + 1;
+                j = j + 1
               }
               mutableRow.setLong(i, ans)
-            }
+            case ArrayConversion(elementConversion) =>
+              val array = rs.getArray(pos).getArray
+              if (array != null) {
+                val data = elementConversion match {
+                  case TimestampConversion =>
+                    array.asInstanceOf[Array[java.sql.Timestamp]].map { timestamp =>
+                      nullSafeConvert(timestamp, DateTimeUtils.fromJavaTimestamp)
+                    }
+                  case StringConversion =>
+                    array.asInstanceOf[Array[java.lang.String]]
+                      .map(UTF8String.fromString)
+                  case DateConversion =>
+                    array.asInstanceOf[Array[java.sql.Date]].map { date =>
+                      nullSafeConvert(date, DateTimeUtils.fromJavaDate)
+                    }
+                  case DecimalConversion(p, s) =>
+                    array.asInstanceOf[Array[java.math.BigDecimal]].map { decimal =>
+                      nullSafeConvert[java.math.BigDecimal](decimal, d => Decimal(d, p, s))
+                    }
+                  case BinaryLongConversion =>
+                    throw new IllegalArgumentException(s"Unsupported array element conversion $i")
+                  case _: ArrayConversion =>
+                    throw new IllegalArgumentException("Nested arrays unsupported")
+                  case _ => array.asInstanceOf[Array[Any]]
+                }
+                mutableRow.update(i, new GenericArrayData(data))
+              } else {
+                mutableRow.update(i, null)
+              }
           }
           if (rs.wasNull) mutableRow.setNullAt(i)
           i = i + 1
@@ -488,4 +518,12 @@ private[sql] class JDBCRDD(
       nextValue
     }
   }
+
+  private def nullSafeConvert[T](input: T, f: T => Any): Any = {
+    if (input == null) {
+      null
+    } else {
+      f(input)
+    }
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
index f89d55b20e21..32d28e59377a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
@@ -23,7 +23,7 @@ import java.util.Properties
 import scala.util.Try
 
 import org.apache.spark.Logging
-import org.apache.spark.sql.jdbc.JdbcDialects
+import org.apache.spark.sql.jdbc.{JdbcDialect, JdbcType, JdbcDialects}
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.{DataFrame, Row}
 
@@ -72,6 +72,35 @@ object JdbcUtils extends Logging {
     conn.prepareStatement(sql.toString())
   }
 
+  /**
+   * Retrieve standard jdbc types.
+   * @param dt The datatype (e.g. [[org.apache.spark.sql.types.StringType]])
+   * @return The default JdbcType for this DataType
+   */
+  def getCommonJDBCType(dt: DataType): Option[JdbcType] = {
+    dt match {
+      case IntegerType => Option(JdbcType("INTEGER", java.sql.Types.INTEGER))
+      case LongType => Option(JdbcType("BIGINT", java.sql.Types.BIGINT))
+      case DoubleType => Option(JdbcType("DOUBLE PRECISION", java.sql.Types.DOUBLE))
+      case FloatType => Option(JdbcType("REAL", java.sql.Types.FLOAT))
+      case ShortType => Option(JdbcType("INTEGER", java.sql.Types.SMALLINT))
+      case ByteType => Option(JdbcType("BYTE", java.sql.Types.TINYINT))
+      case BooleanType => Option(JdbcType("BIT(1)", java.sql.Types.BIT))
+      case StringType => Option(JdbcType("TEXT", java.sql.Types.CLOB))
+      case BinaryType => Option(JdbcType("BLOB", java.sql.Types.BLOB))
+      case TimestampType => Option(JdbcType("TIMESTAMP", java.sql.Types.TIMESTAMP))
+      case DateType => Option(JdbcType("DATE", java.sql.Types.DATE))
+      case t: DecimalType => Option(
+        JdbcType(s"DECIMAL(${t.precision},${t.scale})", java.sql.Types.DECIMAL))
+      case _ => None
+    }
+  }
+
+  private def getJdbcType(dt: DataType, dialect: JdbcDialect): JdbcType = {
+    dialect.getJDBCType(dt).orElse(getCommonJDBCType(dt)).getOrElse(
+      throw new IllegalArgumentException(s"Can't get JDBC type for ${dt.simpleString}"))
+  }
+
   /**
    * Saves a partition of a DataFrame to the JDBC database.  This is done in
    * a single database transaction in order to avoid repeatedly inserting
@@ -92,7 +121,8 @@ object JdbcUtils extends Logging {
       iterator: Iterator[Row],
       rddSchema: StructType,
       nullTypes: Array[Int],
-      batchSize: Int): Iterator[Byte] = {
+      batchSize: Int,
+      dialect: JdbcDialect): Iterator[Byte] = {
     val conn = getConnection()
     var committed = false
     try {
@@ -121,6 +151,11 @@ object JdbcUtils extends Logging {
                 case TimestampType => stmt.setTimestamp(i + 1, row.getAs[java.sql.Timestamp](i))
                 case DateType => stmt.setDate(i + 1, row.getAs[java.sql.Date](i))
                 case t: DecimalType => stmt.setBigDecimal(i + 1, row.getDecimal(i))
+                case ArrayType(et, _) =>
+                  val array = conn.createArrayOf(
+                    getJdbcType(et, dialect).databaseTypeDefinition.toLowerCase,
+                    row.getSeq[AnyRef](i).toArray)
+                  stmt.setArray(i + 1, array)
                 case _ => throw new IllegalArgumentException(
                   s"Can't translate non-null value for field $i")
               }
@@ -169,23 +204,7 @@ object JdbcUtils extends Logging {
     val dialect = JdbcDialects.get(url)
     df.schema.fields foreach { field => {
       val name = field.name
-      val typ: String =
-        dialect.getJDBCType(field.dataType).map(_.databaseTypeDefinition).getOrElse(
-          field.dataType match {
-            case IntegerType => "INTEGER"
-            case LongType => "BIGINT"
-            case DoubleType => "DOUBLE PRECISION"
-            case FloatType => "REAL"
-            case ShortType => "INTEGER"
-            case ByteType => "BYTE"
-            case BooleanType => "BIT(1)"
-            case StringType => "TEXT"
-            case BinaryType => "BLOB"
-            case TimestampType => "TIMESTAMP"
-            case DateType => "DATE"
-            case t: DecimalType => s"DECIMAL(${t.precision},${t.scale})"
-            case _ => throw new IllegalArgumentException(s"Don't know how to save $field to JDBC")
-          })
+      val typ: String = getJdbcType(field.dataType, dialect).databaseTypeDefinition
       val nullable = if (field.nullable) "" else "NOT NULL"
       sb.append(s", $name $typ $nullable")
     }}
@@ -202,23 +221,7 @@ object JdbcUtils extends Logging {
       properties: Properties = new Properties()) {
     val dialect = JdbcDialects.get(url)
     val nullTypes: Array[Int] = df.schema.fields.map { field =>
-      dialect.getJDBCType(field.dataType).map(_.jdbcNullType).getOrElse(
-        field.dataType match {
-          case IntegerType => java.sql.Types.INTEGER
-          case LongType => java.sql.Types.BIGINT
-          case DoubleType => java.sql.Types.DOUBLE
-          case FloatType => java.sql.Types.REAL
-          case ShortType => java.sql.Types.INTEGER
-          case ByteType => java.sql.Types.INTEGER
-          case BooleanType => java.sql.Types.BIT
-          case StringType => java.sql.Types.CLOB
-          case BinaryType => java.sql.Types.BLOB
-          case TimestampType => java.sql.Types.TIMESTAMP
-          case DateType => java.sql.Types.DATE
-          case t: DecimalType => java.sql.Types.DECIMAL
-          case _ => throw new IllegalArgumentException(
-            s"Can't translate null value for field $field")
-        })
+      getJdbcType(field.dataType, dialect).jdbcNullType
     }
 
     val rddSchema = df.schema
@@ -226,7 +229,7 @@ object JdbcUtils extends Logging {
     val getConnection: () => Connection = JDBCRDD.getConnector(driver, url, properties)
     val batchSize = properties.getProperty("batchsize", "1000").toInt
     df.foreachPartition { iterator =>
-      savePartition(getConnection, table, iterator, rddSchema, nullTypes, batchSize)
+      savePartition(getConnection, table, iterator, rddSchema, nullTypes, batchSize, dialect)
     }
   }
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
index 14bfea4e3e28..b3b2cb6178c5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
@@ -51,7 +51,7 @@ case class JdbcType(databaseTypeDefinition : String, jdbcNullType : Int)
  * for the given Catalyst type.
  */
 @DeveloperApi
-abstract class JdbcDialect {
+abstract class JdbcDialect extends Serializable {
   /**
    * Check if this dialect instance can handle a certain jdbc url.
    * @param url the jdbc url.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala
index e701a7fcd9e1..ed3faa126863 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala
@@ -19,6 +19,7 @@ package org.apache.spark.sql.jdbc
 
 import java.sql.Types
 
+import org.apache.spark.sql.execution.datasources.jdbc.JdbcUtils
 import org.apache.spark.sql.types._
 
 
@@ -29,22 +30,40 @@ private object PostgresDialect extends JdbcDialect {
   override def getCatalystType(
       sqlType: Int, typeName: String, size: Int, md: MetadataBuilder): Option[DataType] = {
     if (sqlType == Types.BIT && typeName.equals("bit") && size != 1) {
-      Option(BinaryType)
-    } else if (sqlType == Types.OTHER && typeName.equals("cidr")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("inet")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("json")) {
-      Option(StringType)
-    } else if (sqlType == Types.OTHER && typeName.equals("jsonb")) {
-      Option(StringType)
+      Some(BinaryType)
+    } else if (sqlType == Types.OTHER) {
+      toCatalystType(typeName).filter(_ == StringType)
+    } else if (sqlType == Types.ARRAY && typeName.length > 1 && typeName(0) == '_') {
+      toCatalystType(typeName.drop(1)).map(ArrayType(_))
     } else None
   }
 
+  // TODO: support more type names.
+  private def toCatalystType(typeName: String): Option[DataType] = typeName match {
+    case "bool" => Some(BooleanType)
+    case "bit" => Some(BinaryType)
+    case "int2" => Some(ShortType)
+    case "int4" => Some(IntegerType)
+    case "int8" | "oid" => Some(LongType)
+    case "float4" => Some(FloatType)
+    case "money" | "float8" => Some(DoubleType)
+    case "text" | "varchar" | "char" | "cidr" | "inet" | "json" | "jsonb" | "uuid" =>
+      Some(StringType)
+    case "bytea" => Some(BinaryType)
+    case "timestamp" | "timestamptz" | "time" | "timetz" => Some(TimestampType)
+    case "date" => Some(DateType)
+    case "numeric" => Some(DecimalType.SYSTEM_DEFAULT)
+    case _ => None
+  }
+
   override def getJDBCType(dt: DataType): Option[JdbcType] = dt match {
-    case StringType => Some(JdbcType("TEXT", java.sql.Types.CHAR))
-    case BinaryType => Some(JdbcType("BYTEA", java.sql.Types.BINARY))
-    case BooleanType => Some(JdbcType("BOOLEAN", java.sql.Types.BOOLEAN))
+    case StringType => Some(JdbcType("TEXT", Types.CHAR))
+    case BinaryType => Some(JdbcType("BYTEA", Types.BINARY))
+    case BooleanType => Some(JdbcType("BOOLEAN", Types.BOOLEAN))
+    case ArrayType(et, _) if et.isInstanceOf[AtomicType] =>
+      getJDBCType(et).map(_.databaseTypeDefinition)
+        .orElse(JdbcUtils.getCommonJDBCType(et).map(_.databaseTypeDefinition))
+        .map(typeName => JdbcType(s"$typeName[]", java.sql.Types.ARRAY))
     case _ => None
   }
 

From d98d1cb000c8c4e391d73ae86efd09f15e5d165c Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 17 Nov 2015 12:43:56 -0800
Subject: [PATCH 729/896] [SPARK-11769][ML] Add save, load to all basic
 Transformers

This excludes Estimators and ones which include Vector and other non-basic types for Params or data.  This adds:
* Bucketizer
* DCT
* HashingTF
* Interaction
* NGram
* Normalizer
* OneHotEncoder
* PolynomialExpansion
* QuantileDiscretizer
* RFormula
* SQLTransformer
* StopWordsRemover
* StringIndexer
* Tokenizer
* VectorAssembler
* VectorSlicer

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9755 from jkbradley/transformer-io.
---
 .../apache/spark/ml/feature/Binarizer.scala   |  8 ++++-
 .../apache/spark/ml/feature/Bucketizer.scala  | 22 ++++++++----
 .../org/apache/spark/ml/feature/DCT.scala     | 19 ++++++++--
 .../apache/spark/ml/feature/HashingTF.scala   | 20 +++++++++--
 .../apache/spark/ml/feature/Interaction.scala | 29 ++++++++++++---
 .../org/apache/spark/ml/feature/NGram.scala   | 19 ++++++++--
 .../apache/spark/ml/feature/Normalizer.scala  | 20 +++++++++--
 .../spark/ml/feature/OneHotEncoder.scala      | 19 ++++++++--
 .../ml/feature/PolynomialExpansion.scala      | 20 ++++++++---
 .../ml/feature/QuantileDiscretizer.scala      | 22 ++++++++----
 .../spark/ml/feature/SQLTransformer.scala     | 27 ++++++++++++--
 .../spark/ml/feature/StopWordsRemover.scala   | 19 ++++++++--
 .../spark/ml/feature/StringIndexer.scala      | 22 +++++++++---
 .../apache/spark/ml/feature/Tokenizer.scala   | 35 ++++++++++++++++---
 .../spark/ml/feature/VectorAssembler.scala    | 18 +++++++---
 .../spark/ml/feature/VectorSlicer.scala       | 22 ++++++++----
 .../spark/ml/feature/BinarizerSuite.scala     |  8 ++---
 .../spark/ml/feature/BucketizerSuite.scala    | 12 +++++--
 .../apache/spark/ml/feature/DCTSuite.scala    | 11 +++++-
 .../spark/ml/feature/HashingTFSuite.scala     | 11 +++++-
 .../spark/ml/feature/InteractionSuite.scala   | 10 +++++-
 .../apache/spark/ml/feature/NGramSuite.scala  | 11 +++++-
 .../spark/ml/feature/NormalizerSuite.scala    | 11 +++++-
 .../spark/ml/feature/OneHotEncoderSuite.scala | 12 ++++++-
 .../ml/feature/PolynomialExpansionSuite.scala | 12 ++++++-
 .../ml/feature/QuantileDiscretizerSuite.scala | 13 ++++++-
 .../ml/feature/SQLTransformerSuite.scala      | 10 +++++-
 .../ml/feature/StopWordsRemoverSuite.scala    | 14 +++++++-
 .../spark/ml/feature/StringIndexerSuite.scala | 13 +++++--
 .../spark/ml/feature/TokenizerSuite.scala     | 25 +++++++++++--
 .../ml/feature/VectorAssemblerSuite.scala     | 11 +++++-
 .../spark/ml/feature/VectorSlicerSuite.scala  | 12 ++++++-
 32 files changed, 453 insertions(+), 84 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
index e5c25574d4b1..e2be6547d8f0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute.BinaryAttribute
 import org.apache.spark.ml.param._
@@ -87,10 +87,16 @@ final class Binarizer(override val uid: String)
 
   override def copy(extra: ParamMap): Binarizer = defaultCopy(extra)
 
+  @Since("1.6.0")
   override def write: Writer = new DefaultParamsWriter(this)
 }
 
+@Since("1.6.0")
 object Binarizer extends Readable[Binarizer] {
 
+  @Since("1.6.0")
   override def read: Reader[Binarizer] = new DefaultParamsReader[Binarizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Binarizer = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
index 6fdf25b015b0..7095fbd70aa0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
@@ -20,12 +20,12 @@ package org.apache.spark.ml.feature
 import java.{util => ju}
 
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Model
 import org.apache.spark.ml.attribute.NominalAttribute
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.sql._
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types.{DoubleType, StructField, StructType}
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.{DoubleType, StructField, StructType}
  */
 @Experimental
 final class Bucketizer(override val uid: String)
-  extends Model[Bucketizer] with HasInputCol with HasOutputCol {
+  extends Model[Bucketizer] with HasInputCol with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("bucketizer"))
 
@@ -93,11 +93,15 @@ final class Bucketizer(override val uid: String)
   override def copy(extra: ParamMap): Bucketizer = {
     defaultCopy[Bucketizer](extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-private[feature] object Bucketizer {
+object Bucketizer extends Readable[Bucketizer] {
+
   /** We require splits to be of length >= 3 and to be in strictly increasing order. */
-  def checkSplits(splits: Array[Double]): Boolean = {
+  private[feature] def checkSplits(splits: Array[Double]): Boolean = {
     if (splits.length < 3) {
       false
     } else {
@@ -115,7 +119,7 @@ private[feature] object Bucketizer {
    * Binary searching in several buckets to place each data point.
    * @throws SparkException if a feature is < splits.head or > splits.last
    */
-  def binarySearchForBuckets(splits: Array[Double], feature: Double): Double = {
+  private[feature] def binarySearchForBuckets(splits: Array[Double], feature: Double): Double = {
     if (feature == splits.last) {
       splits.length - 2
     } else {
@@ -134,4 +138,10 @@ private[feature] object Bucketizer {
       }
     }
   }
+
+  @Since("1.6.0")
+  override def read: Reader[Bucketizer] = new DefaultParamsReader[Bucketizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Bucketizer = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
index 228347635c92..6ea5a616173e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
@@ -19,10 +19,10 @@ package org.apache.spark.ml.feature
 
 import edu.emory.mathcs.jtransforms.dct._
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.UnaryTransformer
 import org.apache.spark.ml.param.BooleanParam
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
 import org.apache.spark.sql.types.DataType
 
@@ -37,7 +37,7 @@ import org.apache.spark.sql.types.DataType
  */
 @Experimental
 class DCT(override val uid: String)
-  extends UnaryTransformer[Vector, Vector, DCT] {
+  extends UnaryTransformer[Vector, Vector, DCT] with Writable {
 
   def this() = this(Identifiable.randomUID("dct"))
 
@@ -69,4 +69,17 @@ class DCT(override val uid: String)
   }
 
   override protected def outputDataType: DataType = new VectorUDT
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object DCT extends Readable[DCT] {
+
+  @Since("1.6.0")
+  override def read: Reader[DCT] = new DefaultParamsReader[DCT]
+
+  @Since("1.6.0")
+  override def load(path: String): DCT = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
index 319d23e46cef..6d2ea675f561 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
@@ -17,12 +17,12 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute.AttributeGroup
 import org.apache.spark.ml.param.{IntParam, ParamMap, ParamValidators}
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions.{col, udf}
@@ -33,7 +33,8 @@ import org.apache.spark.sql.types.{ArrayType, StructType}
  * Maps a sequence of terms to their term frequencies using the hashing trick.
  */
 @Experimental
-class HashingTF(override val uid: String) extends Transformer with HasInputCol with HasOutputCol {
+class HashingTF(override val uid: String)
+  extends Transformer with HasInputCol with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("hashingTF"))
 
@@ -76,4 +77,17 @@ class HashingTF(override val uid: String) extends Transformer with HasInputCol w
   }
 
   override def copy(extra: ParamMap): HashingTF = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object HashingTF extends Readable[HashingTF] {
+
+  @Since("1.6.0")
+  override def read: Reader[HashingTF] = new DefaultParamsReader[HashingTF]
+
+  @Since("1.6.0")
+  override def load(path: String): HashingTF = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
index 37f7862476cf..9df6b311cc9d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
@@ -20,11 +20,11 @@ package org.apache.spark.ml.feature
 import scala.collection.mutable.ArrayBuilder
 
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.attribute._
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.ml.Transformer
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
 import org.apache.spark.sql.{DataFrame, Row}
@@ -42,24 +42,30 @@ import org.apache.spark.sql.types._
  * `Vector(6, 8)` if all input features were numeric. If the first feature was instead nominal
  * with four categories, the output would then be `Vector(0, 0, 0, 0, 3, 4, 0, 0)`.
  */
+@Since("1.6.0")
 @Experimental
-class Interaction(override val uid: String) extends Transformer
-  with HasInputCols with HasOutputCol {
+class Interaction @Since("1.6.0") (override val uid: String) extends Transformer
+  with HasInputCols with HasOutputCol with Writable {
 
+  @Since("1.6.0")
   def this() = this(Identifiable.randomUID("interaction"))
 
   /** @group setParam */
+  @Since("1.6.0")
   def setInputCols(values: Array[String]): this.type = set(inputCols, values)
 
   /** @group setParam */
+  @Since("1.6.0")
   def setOutputCol(value: String): this.type = set(outputCol, value)
 
   // optimistic schema; does not contain any ML attributes
+  @Since("1.6.0")
   override def transformSchema(schema: StructType): StructType = {
     validateParams()
     StructType(schema.fields :+ StructField($(outputCol), new VectorUDT, false))
   }
 
+  @Since("1.6.0")
   override def transform(dataset: DataFrame): DataFrame = {
     validateParams()
     val inputFeatures = $(inputCols).map(c => dataset.schema(c))
@@ -208,14 +214,29 @@ class Interaction(override val uid: String) extends Transformer
     }
   }
 
+  @Since("1.6.0")
   override def copy(extra: ParamMap): Interaction = defaultCopy(extra)
 
+  @Since("1.6.0")
   override def validateParams(): Unit = {
     require(get(inputCols).isDefined, "Input cols must be defined first.")
     require(get(outputCol).isDefined, "Output col must be defined first.")
     require($(inputCols).length > 0, "Input cols must have non-zero length.")
     require($(inputCols).distinct.length == $(inputCols).length, "Input cols must be distinct.")
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object Interaction extends Readable[Interaction] {
+
+  @Since("1.6.0")
+  override def read: Reader[Interaction] = new DefaultParamsReader[Interaction]
+
+  @Since("1.6.0")
+  override def load(path: String): Interaction = read.load(path)
 }
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
index 8de10eb51f92..4a17acd95199 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
@@ -17,10 +17,10 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.UnaryTransformer
 import org.apache.spark.ml.param._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
 
 /**
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
  */
 @Experimental
 class NGram(override val uid: String)
-  extends UnaryTransformer[Seq[String], Seq[String], NGram] {
+  extends UnaryTransformer[Seq[String], Seq[String], NGram] with Writable {
 
   def this() = this(Identifiable.randomUID("ngram"))
 
@@ -66,4 +66,17 @@ class NGram(override val uid: String)
   }
 
   override protected def outputDataType: DataType = new ArrayType(StringType, false)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object NGram extends Readable[NGram] {
+
+  @Since("1.6.0")
+  override def read: Reader[NGram] = new DefaultParamsReader[NGram]
+
+  @Since("1.6.0")
+  override def load(path: String): NGram = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
index 8282e5ffa17f..9df6a091d505 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
@@ -17,10 +17,10 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.UnaryTransformer
 import org.apache.spark.ml.param.{DoubleParam, ParamValidators}
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
 import org.apache.spark.sql.types.DataType
@@ -30,7 +30,8 @@ import org.apache.spark.sql.types.DataType
  * Normalize a vector to have unit norm using the given p-norm.
  */
 @Experimental
-class Normalizer(override val uid: String) extends UnaryTransformer[Vector, Vector, Normalizer] {
+class Normalizer(override val uid: String)
+  extends UnaryTransformer[Vector, Vector, Normalizer] with Writable {
 
   def this() = this(Identifiable.randomUID("normalizer"))
 
@@ -55,4 +56,17 @@ class Normalizer(override val uid: String) extends UnaryTransformer[Vector, Vect
   }
 
   override protected def outputDataType: DataType = new VectorUDT()
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object Normalizer extends Readable[Normalizer] {
+
+  @Since("1.6.0")
+  override def read: Reader[Normalizer] = new DefaultParamsReader[Normalizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Normalizer = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
index 9c60d4084ec4..4e2adfaafa21 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
@@ -17,12 +17,12 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute._
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions.{col, udf}
@@ -44,7 +44,7 @@ import org.apache.spark.sql.types.{DoubleType, StructType}
  */
 @Experimental
 class OneHotEncoder(override val uid: String) extends Transformer
-  with HasInputCol with HasOutputCol {
+  with HasInputCol with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("oneHot"))
 
@@ -165,4 +165,17 @@ class OneHotEncoder(override val uid: String) extends Transformer
   }
 
   override def copy(extra: ParamMap): OneHotEncoder = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object OneHotEncoder extends Readable[OneHotEncoder] {
+
+  @Since("1.6.0")
+  override def read: Reader[OneHotEncoder] = new DefaultParamsReader[OneHotEncoder]
+
+  @Since("1.6.0")
+  override def load(path: String): OneHotEncoder = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
index d85e468562d4..49415398325f 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
@@ -19,10 +19,10 @@ package org.apache.spark.ml.feature
 
 import scala.collection.mutable
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.UnaryTransformer
 import org.apache.spark.ml.param.{ParamMap, IntParam, ParamValidators}
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.sql.types.DataType
 
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.DataType
  */
 @Experimental
 class PolynomialExpansion(override val uid: String)
-  extends UnaryTransformer[Vector, Vector, PolynomialExpansion] {
+  extends UnaryTransformer[Vector, Vector, PolynomialExpansion] with Writable {
 
   def this() = this(Identifiable.randomUID("poly"))
 
@@ -63,6 +63,9 @@ class PolynomialExpansion(override val uid: String)
   override protected def outputDataType: DataType = new VectorUDT()
 
   override def copy(extra: ParamMap): PolynomialExpansion = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 /**
@@ -77,7 +80,8 @@ class PolynomialExpansion(override val uid: String)
  * To handle sparsity, if c is zero, we can skip all monomials that contain it. We remember the
  * current index and increment it properly for sparse input.
  */
-private[feature] object PolynomialExpansion {
+@Since("1.6.0")
+object PolynomialExpansion extends Readable[PolynomialExpansion] {
 
   private def choose(n: Int, k: Int): Int = {
     Range(n, n - k, -1).product / Range(k, 1, -1).product
@@ -169,11 +173,17 @@ private[feature] object PolynomialExpansion {
     new SparseVector(polySize - 1, polyIndices.result(), polyValues.result())
   }
 
-  def expand(v: Vector, degree: Int): Vector = {
+  private[feature] def expand(v: Vector, degree: Int): Vector = {
     v match {
       case dv: DenseVector => expand(dv, degree)
       case sv: SparseVector => expand(sv, degree)
       case _ => throw new IllegalArgumentException
     }
   }
+
+  @Since("1.6.0")
+  override def read: Reader[PolynomialExpansion] = new DefaultParamsReader[PolynomialExpansion]
+
+  @Since("1.6.0")
+  override def load(path: String): PolynomialExpansion = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
index 46b836da9cfd..2da5c966d296 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.feature
 import scala.collection.mutable
 
 import org.apache.spark.Logging
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml._
 import org.apache.spark.ml.attribute.NominalAttribute
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
@@ -60,7 +60,7 @@ private[feature] trait QuantileDiscretizerBase extends Params with HasInputCol w
  */
 @Experimental
 final class QuantileDiscretizer(override val uid: String)
-  extends Estimator[Bucketizer] with QuantileDiscretizerBase {
+  extends Estimator[Bucketizer] with QuantileDiscretizerBase with Writable {
 
   def this() = this(Identifiable.randomUID("quantileDiscretizer"))
 
@@ -93,13 +93,17 @@ final class QuantileDiscretizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): QuantileDiscretizer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-private[feature] object QuantileDiscretizer extends Logging {
+@Since("1.6.0")
+object QuantileDiscretizer extends Readable[QuantileDiscretizer] with Logging {
   /**
    * Sampling from the given dataset to collect quantile statistics.
    */
-  def getSampledInput(dataset: DataFrame, numBins: Int): Array[Row] = {
+  private[feature] def getSampledInput(dataset: DataFrame, numBins: Int): Array[Row] = {
     val totalSamples = dataset.count()
     require(totalSamples > 0,
       "QuantileDiscretizer requires non-empty input dataset but was given an empty input.")
@@ -111,6 +115,7 @@ private[feature] object QuantileDiscretizer extends Logging {
   /**
    * Compute split points with respect to the sample distribution.
    */
+  private[feature]
   def findSplitCandidates(samples: Array[Double], numSplits: Int): Array[Double] = {
     val valueCountMap = samples.foldLeft(Map.empty[Double, Int]) { (m, x) =>
       m + ((x, m.getOrElse(x, 0) + 1))
@@ -150,7 +155,7 @@ private[feature] object QuantileDiscretizer extends Logging {
    * Adjust split candidates to proper splits by: adding positive/negative infinity to both sides as
    * needed, and adding a default split value of 0 if no good candidates are found.
    */
-  def getSplits(candidates: Array[Double]): Array[Double] = {
+  private[feature] def getSplits(candidates: Array[Double]): Array[Double] = {
     val effectiveValues = if (candidates.size != 0) {
       if (candidates.head == Double.NegativeInfinity
         && candidates.last == Double.PositiveInfinity) {
@@ -172,5 +177,10 @@ private[feature] object QuantileDiscretizer extends Logging {
       Array(Double.NegativeInfinity) ++ effectiveValues ++ Array(Double.PositiveInfinity)
     }
   }
-}
 
+  @Since("1.6.0")
+  override def read: Reader[QuantileDiscretizer] = new DefaultParamsReader[QuantileDiscretizer]
+
+  @Since("1.6.0")
+  override def load(path: String): QuantileDiscretizer = read.load(path)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
index 95e430563873..c115064ff301 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
@@ -18,10 +18,10 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.param.{ParamMap, Param}
 import org.apache.spark.ml.Transformer
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.{SQLContext, DataFrame, Row}
 import org.apache.spark.sql.types.StructType
 
@@ -32,24 +32,30 @@ import org.apache.spark.sql.types.StructType
  * where '__THIS__' represents the underlying table of the input dataset.
  */
 @Experimental
-class SQLTransformer (override val uid: String) extends Transformer {
+@Since("1.6.0")
+class SQLTransformer @Since("1.6.0") (override val uid: String) extends Transformer with Writable {
 
+  @Since("1.6.0")
   def this() = this(Identifiable.randomUID("sql"))
 
   /**
    * SQL statement parameter. The statement is provided in string form.
    * @group param
    */
+  @Since("1.6.0")
   final val statement: Param[String] = new Param[String](this, "statement", "SQL statement")
 
   /** @group setParam */
+  @Since("1.6.0")
   def setStatement(value: String): this.type = set(statement, value)
 
   /** @group getParam */
+  @Since("1.6.0")
   def getStatement: String = $(statement)
 
   private val tableIdentifier: String = "__THIS__"
 
+  @Since("1.6.0")
   override def transform(dataset: DataFrame): DataFrame = {
     val tableName = Identifiable.randomUID(uid)
     dataset.registerTempTable(tableName)
@@ -58,6 +64,7 @@ class SQLTransformer (override val uid: String) extends Transformer {
     outputDF
   }
 
+  @Since("1.6.0")
   override def transformSchema(schema: StructType): StructType = {
     val sc = SparkContext.getOrCreate()
     val sqlContext = SQLContext.getOrCreate(sc)
@@ -68,5 +75,19 @@ class SQLTransformer (override val uid: String) extends Transformer {
     outputSchema
   }
 
+  @Since("1.6.0")
   override def copy(extra: ParamMap): SQLTransformer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object SQLTransformer extends Readable[SQLTransformer] {
+
+  @Since("1.6.0")
+  override def read: Reader[SQLTransformer] = new DefaultParamsReader[SQLTransformer]
+
+  @Since("1.6.0")
+  override def load(path: String): SQLTransformer = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
index 2a79582625e9..f1146988dcc7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
@@ -17,11 +17,11 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.param.{BooleanParam, ParamMap, StringArrayParam}
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions.{col, udf}
 import org.apache.spark.sql.types.{ArrayType, StringType, StructField, StructType}
@@ -86,7 +86,7 @@ private[spark] object StopWords {
  */
 @Experimental
 class StopWordsRemover(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol {
+  extends Transformer with HasInputCol with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("stopWords"))
 
@@ -154,4 +154,17 @@ class StopWordsRemover(override val uid: String)
   }
 
   override def copy(extra: ParamMap): StopWordsRemover = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object StopWordsRemover extends Readable[StopWordsRemover] {
+
+  @Since("1.6.0")
+  override def read: Reader[StopWordsRemover] = new DefaultParamsReader[StopWordsRemover]
+
+  @Since("1.6.0")
+  override def load(path: String): StopWordsRemover = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
index 486274cd75a1..f782a272d11d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
@@ -18,13 +18,13 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.attribute.{Attribute, NominalAttribute}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.Transformer
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types._
@@ -188,9 +188,8 @@ class StringIndexerModel (
  * @see [[StringIndexer]] for converting strings into indices
  */
 @Experimental
-class IndexToString private[ml] (
-  override val uid: String) extends Transformer
-    with HasInputCol with HasOutputCol {
+class IndexToString private[ml] (override val uid: String)
+  extends Transformer with HasInputCol with HasOutputCol with Writable {
 
   def this() =
     this(Identifiable.randomUID("idxToStr"))
@@ -257,4 +256,17 @@ class IndexToString private[ml] (
   override def copy(extra: ParamMap): IndexToString = {
     defaultCopy(extra)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object IndexToString extends Readable[IndexToString] {
+
+  @Since("1.6.0")
+  override def read: Reader[IndexToString] = new DefaultParamsReader[IndexToString]
+
+  @Since("1.6.0")
+  override def load(path: String): IndexToString = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
index 1b82b40caac1..0e4445d1e2fa 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
@@ -17,10 +17,10 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.UnaryTransformer
 import org.apache.spark.ml.param._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
 
 /**
@@ -30,7 +30,8 @@ import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
  * @see [[RegexTokenizer]]
  */
 @Experimental
-class Tokenizer(override val uid: String) extends UnaryTransformer[String, Seq[String], Tokenizer] {
+class Tokenizer(override val uid: String)
+  extends UnaryTransformer[String, Seq[String], Tokenizer] with Writable {
 
   def this() = this(Identifiable.randomUID("tok"))
 
@@ -45,6 +46,19 @@ class Tokenizer(override val uid: String) extends UnaryTransformer[String, Seq[S
   override protected def outputDataType: DataType = new ArrayType(StringType, true)
 
   override def copy(extra: ParamMap): Tokenizer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object Tokenizer extends Readable[Tokenizer] {
+
+  @Since("1.6.0")
+  override def read: Reader[Tokenizer] = new DefaultParamsReader[Tokenizer]
+
+  @Since("1.6.0")
+  override def load(path: String): Tokenizer = read.load(path)
 }
 
 /**
@@ -56,7 +70,7 @@ class Tokenizer(override val uid: String) extends UnaryTransformer[String, Seq[S
  */
 @Experimental
 class RegexTokenizer(override val uid: String)
-  extends UnaryTransformer[String, Seq[String], RegexTokenizer] {
+  extends UnaryTransformer[String, Seq[String], RegexTokenizer] with Writable {
 
   def this() = this(Identifiable.randomUID("regexTok"))
 
@@ -131,4 +145,17 @@ class RegexTokenizer(override val uid: String)
   override protected def outputDataType: DataType = new ArrayType(StringType, true)
 
   override def copy(extra: ParamMap): RegexTokenizer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object RegexTokenizer extends Readable[RegexTokenizer] {
+
+  @Since("1.6.0")
+  override def read: Reader[RegexTokenizer] = new DefaultParamsReader[RegexTokenizer]
+
+  @Since("1.6.0")
+  override def load(path: String): RegexTokenizer = read.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
index 086917fa680f..7e54205292ca 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
@@ -20,12 +20,12 @@ package org.apache.spark.ml.feature
 import scala.collection.mutable.ArrayBuilder
 
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute.{Attribute, AttributeGroup, NumericAttribute, UnresolvedAttribute}
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
 import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.sql.functions._
@@ -37,7 +37,7 @@ import org.apache.spark.sql.types._
  */
 @Experimental
 class VectorAssembler(override val uid: String)
-  extends Transformer with HasInputCols with HasOutputCol {
+  extends Transformer with HasInputCols with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("vecAssembler"))
 
@@ -120,9 +120,19 @@ class VectorAssembler(override val uid: String)
   }
 
   override def copy(extra: ParamMap): VectorAssembler = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-private object VectorAssembler {
+@Since("1.6.0")
+object VectorAssembler extends Readable[VectorAssembler] {
+
+  @Since("1.6.0")
+  override def read: Reader[VectorAssembler] = new DefaultParamsReader[VectorAssembler]
+
+  @Since("1.6.0")
+  override def load(path: String): VectorAssembler = read.load(path)
 
   private[feature] def assemble(vv: Any*): Vector = {
     val indices = ArrayBuilder.make[Int]
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
index fb3387d4aa9b..911582b55b57 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
@@ -17,12 +17,12 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.attribute.{Attribute, AttributeGroup}
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
 import org.apache.spark.ml.param.{IntArrayParam, ParamMap, StringArrayParam}
-import org.apache.spark.ml.util.{Identifiable, MetadataUtils, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions._
@@ -42,7 +42,7 @@ import org.apache.spark.sql.types.StructType
  */
 @Experimental
 final class VectorSlicer(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol {
+  extends Transformer with HasInputCol with HasOutputCol with Writable {
 
   def this() = this(Identifiable.randomUID("vectorSlicer"))
 
@@ -151,12 +151,16 @@ final class VectorSlicer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): VectorSlicer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-private[feature] object VectorSlicer {
+@Since("1.6.0")
+object VectorSlicer extends Readable[VectorSlicer] {
 
   /** Return true if given feature indices are valid */
-  def validIndices(indices: Array[Int]): Boolean = {
+  private[feature] def validIndices(indices: Array[Int]): Boolean = {
     if (indices.isEmpty) {
       true
     } else {
@@ -165,7 +169,13 @@ private[feature] object VectorSlicer {
   }
 
   /** Return true if given feature names are valid */
-  def validNames(names: Array[String]): Boolean = {
+  private[feature] def validNames(names: Array[String]): Boolean = {
     names.forall(_.nonEmpty) && names.length == names.distinct.length
   }
+
+  @Since("1.6.0")
+  override def read: Reader[VectorSlicer] = new DefaultParamsReader[VectorSlicer]
+
+  @Since("1.6.0")
+  override def load(path: String): VectorSlicer = read.load(path)
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
index 9dfa1439cc30..6d2d8fe71444 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/BinarizerSuite.scala
@@ -69,10 +69,10 @@ class BinarizerSuite extends SparkFunSuite with MLlibTestSparkContext with Defau
   }
 
   test("read/write") {
-    val binarizer = new Binarizer()
-      .setInputCol("feature")
-      .setOutputCol("binarized_feature")
+    val t = new Binarizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
       .setThreshold(0.1)
-    testDefaultReadWrite(binarizer)
+    testDefaultReadWrite(t)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/BucketizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/BucketizerSuite.scala
index 0eba34fda622..9ea7d431763a 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/BucketizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/BucketizerSuite.scala
@@ -21,13 +21,13 @@ import scala.util.Random
 
 import org.apache.spark.{SparkException, SparkFunSuite}
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row}
 
-class BucketizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class BucketizerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new Bucketizer)
@@ -112,6 +112,14 @@ class BucketizerSuite extends SparkFunSuite with MLlibTestSparkContext {
     val lsResult = Vectors.dense(data.map(x => BucketizerSuite.linearSearchForBuckets(splits, x)))
     assert(bsResult ~== lsResult absTol 1e-5)
   }
+
+  test("read/write") {
+    val t = new Bucketizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setSplits(Array(0.1, 0.8, 0.9))
+    testDefaultReadWrite(t)
+  }
 }
 
 private object BucketizerSuite extends SparkFunSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/DCTSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/DCTSuite.scala
index 37ed2367c33f..0f2aafebafe6 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/DCTSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/DCTSuite.scala
@@ -22,6 +22,7 @@ import scala.beans.BeanInfo
 import edu.emory.mathcs.jtransforms.dct.DoubleDCT_1D
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
@@ -29,7 +30,7 @@ import org.apache.spark.sql.{DataFrame, Row}
 @BeanInfo
 case class DCTTestData(vec: Vector, wantedVec: Vector)
 
-class DCTSuite extends SparkFunSuite with MLlibTestSparkContext {
+class DCTSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("forward transform of discrete cosine matches jTransforms result") {
     val data = Vectors.dense((0 until 128).map(_ => 2D * math.random - 1D).toArray)
@@ -45,6 +46,14 @@ class DCTSuite extends SparkFunSuite with MLlibTestSparkContext {
     testDCT(data, inverse)
   }
 
+  test("read/write") {
+    val t = new DCT()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setInverse(true)
+    testDefaultReadWrite(t)
+  }
+
   private def testDCT(data: Vector, inverse: Boolean): Unit = {
     val expectedResultBuffer = data.toArray.clone()
     if (inverse) {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/HashingTFSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/HashingTFSuite.scala
index 4157b84b29d0..0dcd0f49465e 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/HashingTFSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/HashingTFSuite.scala
@@ -20,12 +20,13 @@ package org.apache.spark.ml.feature
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.attribute.AttributeGroup
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.util.Utils
 
-class HashingTFSuite extends SparkFunSuite with MLlibTestSparkContext {
+class HashingTFSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new HashingTF)
@@ -50,4 +51,12 @@ class HashingTFSuite extends SparkFunSuite with MLlibTestSparkContext {
       Seq((idx("a"), 2.0), (idx("b"), 2.0), (idx("c"), 1.0), (idx("d"), 1.0)))
     assert(features ~== expected absTol 1e-14)
   }
+
+  test("read/write") {
+    val t = new HashingTF()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setNumFeatures(10)
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala
index 2beb62ca0823..932d331b472b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/InteractionSuite.scala
@@ -19,6 +19,7 @@ package org.apache.spark.ml.feature
 
 import scala.collection.mutable.ArrayBuilder
 
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.{SparkException, SparkFunSuite}
 import org.apache.spark.ml.attribute._
 import org.apache.spark.ml.param.ParamsSuite
@@ -26,7 +27,7 @@ import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.functions.col
 
-class InteractionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class InteractionSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
   test("params") {
     ParamsSuite.checkParams(new Interaction())
   }
@@ -162,4 +163,11 @@ class InteractionSuite extends SparkFunSuite with MLlibTestSparkContext {
         new NumericAttribute(Some("a_2:b_1:c"), Some(9))))
     assert(attrs === expectedAttrs)
   }
+
+  test("read/write") {
+    val t = new Interaction()
+      .setInputCols(Array("myInputCol", "myInputCol2"))
+      .setOutputCol("myOutputCol")
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/NGramSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/NGramSuite.scala
index ab97e3dbc6ee..58fda29aa1e6 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/NGramSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/NGramSuite.scala
@@ -20,13 +20,14 @@ package org.apache.spark.ml.feature
 import scala.beans.BeanInfo
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
 
 @BeanInfo
 case class NGramTestData(inputTokens: Array[String], wantedNGrams: Array[String])
 
-class NGramSuite extends SparkFunSuite with MLlibTestSparkContext {
+class NGramSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
   import org.apache.spark.ml.feature.NGramSuite._
 
   test("default behavior yields bigram features") {
@@ -79,6 +80,14 @@ class NGramSuite extends SparkFunSuite with MLlibTestSparkContext {
       )))
     testNGram(nGram, dataset)
   }
+
+  test("read/write") {
+    val t = new NGram()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setN(3)
+    testDefaultReadWrite(t)
+  }
 }
 
 object NGramSuite extends SparkFunSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/NormalizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/NormalizerSuite.scala
index 9f03470b7f32..de3d438ce83b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/NormalizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/NormalizerSuite.scala
@@ -18,13 +18,14 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 
 
-class NormalizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class NormalizerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   @transient var data: Array[Vector] = _
   @transient var dataFrame: DataFrame = _
@@ -104,6 +105,14 @@ class NormalizerSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     assertValues(result, l1Normalized)
   }
+
+  test("read/write") {
+    val t = new Normalizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setP(3.0)
+    testDefaultReadWrite(t)
+  }
 }
 
 private object NormalizerSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/OneHotEncoderSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/OneHotEncoderSuite.scala
index 321eeb843941..76d12050f967 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/OneHotEncoderSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/OneHotEncoderSuite.scala
@@ -20,12 +20,14 @@ package org.apache.spark.ml.feature
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.attribute.{AttributeGroup, BinaryAttribute, NominalAttribute}
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions.col
 
-class OneHotEncoderSuite extends SparkFunSuite with MLlibTestSparkContext {
+class OneHotEncoderSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   def stringIndexed(): DataFrame = {
     val data = sc.parallelize(Seq((0, "a"), (1, "b"), (2, "c"), (3, "a"), (4, "a"), (5, "c")), 2)
@@ -101,4 +103,12 @@ class OneHotEncoderSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(group.getAttr(0) === BinaryAttribute.defaultAttr.withName("0").withIndex(0))
     assert(group.getAttr(1) === BinaryAttribute.defaultAttr.withName("1").withIndex(1))
   }
+
+  test("read/write") {
+    val t = new OneHotEncoder()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setDropLast(false)
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/PolynomialExpansionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/PolynomialExpansionSuite.scala
index 29eebd8960eb..70892dc57170 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/PolynomialExpansionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/PolynomialExpansionSuite.scala
@@ -21,12 +21,14 @@ import org.apache.spark.ml.param.ParamsSuite
 import org.scalatest.exceptions.TestFailedException
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.Row
 
-class PolynomialExpansionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class PolynomialExpansionSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new PolynomialExpansion)
@@ -98,5 +100,13 @@ class PolynomialExpansionSuite extends SparkFunSuite with MLlibTestSparkContext
         throw new TestFailedException("Unmatched data types after polynomial expansion", 0)
     }
   }
+
+  test("read/write") {
+    val t = new PolynomialExpansion()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setDegree(3)
+    testDefaultReadWrite(t)
+  }
 }
 
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala
index b2bdd8935f90..3a4f6d235aa6 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/QuantileDiscretizerSuite.scala
@@ -18,11 +18,14 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.ml.attribute.{Attribute, NominalAttribute}
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{Row, SQLContext}
 import org.apache.spark.{SparkContext, SparkFunSuite}
 
-class QuantileDiscretizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class QuantileDiscretizerSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
+
   import org.apache.spark.ml.feature.QuantileDiscretizerSuite._
 
   test("Test quantile discretizer") {
@@ -67,6 +70,14 @@ class QuantileDiscretizerSuite extends SparkFunSuite with MLlibTestSparkContext
       assert(QuantileDiscretizer.getSplits(ori) === res, "Returned splits are invalid.")
     }
   }
+
+  test("read/write") {
+    val t = new QuantileDiscretizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setNumBuckets(6)
+    testDefaultReadWrite(t)
+  }
 }
 
 private object QuantileDiscretizerSuite extends SparkFunSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/SQLTransformerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/SQLTransformerSuite.scala
index d19052881ae4..553e0b870216 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/SQLTransformerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/SQLTransformerSuite.scala
@@ -19,9 +19,11 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 
-class SQLTransformerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class SQLTransformerSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new SQLTransformer())
@@ -41,4 +43,10 @@ class SQLTransformerSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(resultSchema == expected.schema)
     assert(result.collect().toSeq == expected.collect().toSeq)
   }
+
+  test("read/write") {
+    val t = new SQLTransformer()
+      .setStatement("select * from __THIS__")
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StopWordsRemoverSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StopWordsRemoverSuite.scala
index e0d433f566c2..fb217e0c1de9 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/StopWordsRemoverSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StopWordsRemoverSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
 
@@ -32,7 +33,9 @@ object StopWordsRemoverSuite extends SparkFunSuite {
   }
 }
 
-class StopWordsRemoverSuite extends SparkFunSuite with MLlibTestSparkContext {
+class StopWordsRemoverSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
+
   import StopWordsRemoverSuite._
 
   test("StopWordsRemover default") {
@@ -77,4 +80,13 @@ class StopWordsRemoverSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     testStopWordsRemover(remover, dataSet)
   }
+
+  test("read/write") {
+    val t = new StopWordsRemover()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setStopWords(Array("the", "a"))
+      .setCaseSensitive(true)
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
index ddcdb5f4212b..be37bfb43883 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
@@ -21,12 +21,13 @@ import org.apache.spark.sql.types.{StringType, StructType, StructField, DoubleTy
 import org.apache.spark.{SparkException, SparkFunSuite}
 import org.apache.spark.ml.attribute.{Attribute, NominalAttribute}
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.functions.col
 
-class StringIndexerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class StringIndexerSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new StringIndexer)
@@ -173,4 +174,12 @@ class StringIndexerSuite extends SparkFunSuite with MLlibTestSparkContext {
     val outSchema = idxToStr.transformSchema(inSchema)
     assert(outSchema("output").dataType === StringType)
   }
+
+  test("read/write") {
+    val t = new IndexToString()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setLabels(Array("a", "b", "c"))
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
index a02992a2407b..36e8e5d86838 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/TokenizerSuite.scala
@@ -21,20 +21,30 @@ import scala.beans.BeanInfo
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
 
 @BeanInfo
 case class TokenizerTestData(rawText: String, wantedTokens: Array[String])
 
-class TokenizerSuite extends SparkFunSuite {
+class TokenizerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new Tokenizer)
   }
+
+  test("read/write") {
+    val t = new Tokenizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+    testDefaultReadWrite(t)
+  }
 }
 
-class RegexTokenizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class RegexTokenizerSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
+
   import org.apache.spark.ml.feature.RegexTokenizerSuite._
 
   test("params") {
@@ -81,6 +91,17 @@ class RegexTokenizerSuite extends SparkFunSuite with MLlibTestSparkContext {
     ))
     testRegexTokenizer(tokenizer, dataset)
   }
+
+  test("read/write") {
+    val t = new RegexTokenizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMinTokenLength(2)
+      .setGaps(false)
+      .setPattern("hi")
+      .setToLowercase(false)
+    testDefaultReadWrite(t)
+  }
 }
 
 object RegexTokenizerSuite extends SparkFunSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
index bb4d5b983e0d..fb21ab6b9bf2 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.ml.feature
 
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.{SparkException, SparkFunSuite}
 import org.apache.spark.ml.attribute.{AttributeGroup, NominalAttribute, NumericAttribute}
 import org.apache.spark.ml.param.ParamsSuite
@@ -25,7 +26,8 @@ import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.functions.col
 
-class VectorAssemblerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class VectorAssemblerSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new VectorAssembler)
@@ -101,4 +103,11 @@ class VectorAssemblerSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(features.getAttr(5) === NumericAttribute.defaultAttr.withIndex(5))
     assert(features.getAttr(6) === NumericAttribute.defaultAttr.withIndex(6))
   }
+
+  test("read/write") {
+    val t = new VectorAssembler()
+      .setInputCols(Array("myInputCol", "myInputCol2"))
+      .setOutputCol("myOutputCol")
+    testDefaultReadWrite(t)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorSlicerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorSlicerSuite.scala
index a6c2fba8360d..74706a23e093 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorSlicerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorSlicerSuite.scala
@@ -20,12 +20,13 @@ package org.apache.spark.ml.feature
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.attribute.{Attribute, AttributeGroup, NumericAttribute}
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.types.StructType
 import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 
-class VectorSlicerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class VectorSlicerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     val slicer = new VectorSlicer
@@ -106,4 +107,13 @@ class VectorSlicerSuite extends SparkFunSuite with MLlibTestSparkContext {
     vectorSlicer.setIndices(Array.empty).setNames(Array("f1", "f4"))
     validateResults(vectorSlicer.transform(df))
   }
+
+  test("read/write") {
+    val t = new VectorSlicer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setIndices(Array(1, 3))
+      .setNames(Array("a", "d"))
+    testDefaultReadWrite(t)
+  }
 }

From 5aca6ad00c9d7fa43c725b8da4a10114a3a77421 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 17 Nov 2015 12:50:01 -0800
Subject: [PATCH 730/896] [SPARK-11767] [SQL] limit the size of caced batch

Currently the size of cached batch in only controlled by `batchSize` (default value is 10000), which does not work well with the size of serialized columns (for example, complex types). The memory used to build the batch is not accounted, it's easy to OOM (especially after unified memory management).

This PR introduce a hard limit as 4M for total columns (up to 50 columns of uncompressed primitive columns).

This also change the way to grow buffer, double it each time, then trim it once finished.

cc liancheng

Author: Davies Liu <davies@databricks.com>

Closes #9760 from davies/cache_limit.
---
 .../apache/spark/sql/columnar/ColumnBuilder.scala    | 12 ++++++++++--
 .../org/apache/spark/sql/columnar/ColumnStats.scala  |  2 +-
 .../sql/columnar/InMemoryColumnarTableScan.scala     |  6 +++++-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
index 7a7345a7e004..599f30f2d73b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
@@ -73,6 +73,13 @@ private[sql] class BasicColumnBuilder[JvmType](
   }
 
   override def build(): ByteBuffer = {
+    if (buffer.capacity() > buffer.position() * 1.1) {
+      // trim the buffer
+      buffer = ByteBuffer
+        .allocate(buffer.position())
+        .order(ByteOrder.nativeOrder())
+        .put(buffer.array(), 0, buffer.position())
+    }
     buffer.flip().asInstanceOf[ByteBuffer]
   }
 }
@@ -129,7 +136,8 @@ private[sql] class MapColumnBuilder(dataType: MapType)
   extends ComplexColumnBuilder(new ObjectColumnStats(dataType), MAP(dataType))
 
 private[sql] object ColumnBuilder {
-  val DEFAULT_INITIAL_BUFFER_SIZE = 1024 * 1024
+  val DEFAULT_INITIAL_BUFFER_SIZE = 128 * 1024
+  val MAX_BATCH_SIZE_IN_BYTE = 4 * 1024 * 1024L
 
   private[columnar] def ensureFreeSpace(orig: ByteBuffer, size: Int) = {
     if (orig.remaining >= size) {
@@ -137,7 +145,7 @@ private[sql] object ColumnBuilder {
     } else {
       // grow in steps of initial size
       val capacity = orig.capacity()
-      val newSize = capacity + size.max(capacity / 8 + 1)
+      val newSize = capacity + size.max(capacity)
       val pos = orig.position()
 
       ByteBuffer
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
index ba61003ba41c..91a05650585c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
@@ -48,7 +48,7 @@ private[sql] class PartitionStatistics(tableSchema: Seq[Attribute]) extends Seri
 private[sql] sealed trait ColumnStats extends Serializable {
   protected var count = 0
   protected var nullCount = 0
-  protected var sizeInBytes = 0L
+  private[sql] var sizeInBytes = 0L
 
   /**
    * Gathers statistics information from `row(ordinal)`.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
index 2cface61e59c..ae77298e6da2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
@@ -133,7 +133,9 @@ private[sql] case class InMemoryRelation(
           }.toArray
 
           var rowCount = 0
-          while (rowIterator.hasNext && rowCount < batchSize) {
+          var totalSize = 0L
+          while (rowIterator.hasNext && rowCount < batchSize
+            && totalSize < ColumnBuilder.MAX_BATCH_SIZE_IN_BYTE) {
             val row = rowIterator.next()
 
             // Added for SPARK-6082. This assertion can be useful for scenarios when something
@@ -147,8 +149,10 @@ private[sql] case class InMemoryRelation(
                 s"\nRow content: $row")
 
             var i = 0
+            totalSize = 0
             while (i < row.numFields) {
               columnBuilders(i).appendFrom(row, i)
+              totalSize += columnBuilders(i).columnStats.sizeInBytes
               i += 1
             }
             rowCount += 1

From fa603e08de641df16d066302be5d5f92a60a923e Mon Sep 17 00:00:00 2001
From: Timothy Hunter <timhunter@databricks.com>
Date: Tue, 17 Nov 2015 20:51:20 +0000
Subject: [PATCH 731/896] [SPARK-11732] Removes some MiMa false positives

This adds an extra filter for private or protected classes. We only filter for package private right now.

Author: Timothy Hunter <timhunter@databricks.com>

Closes #9697 from thunterdb/spark-11732.
---
 project/MimaExcludes.scala                                 | 7 +------
 .../scala/org/apache/spark/tools/GenerateMIMAIgnore.scala  | 4 +++-
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 815951822c1e..8b3bc96801e2 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -54,12 +54,7 @@ object MimaExcludes {
       MimaBuild.excludeSparkClass("streaming.flume.FlumeTestUtils") ++
       MimaBuild.excludeSparkClass("streaming.flume.PollingFlumeTestUtils") ++
       Seq(
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.ml.classification.LogisticCostFun.this"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.ml.classification.LogisticAggregator.add"),
-        ProblemFilters.exclude[MissingMethodProblem](
-          "org.apache.spark.ml.classification.LogisticAggregator.count"),
+        // MiMa does not deal properly with sealed traits
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.ml.classification.LogisticRegressionSummary.featuresCol")
       ) ++ Seq(
diff --git a/tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala b/tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala
index a0524cabff2d..5155daa6d17b 100644
--- a/tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala
+++ b/tools/src/main/scala/org/apache/spark/tools/GenerateMIMAIgnore.scala
@@ -72,7 +72,9 @@ object GenerateMIMAIgnore {
         val classSymbol = mirror.classSymbol(Class.forName(className, false, classLoader))
         val moduleSymbol = mirror.staticModule(className)
         val directlyPrivateSpark =
-          isPackagePrivate(classSymbol) || isPackagePrivateModule(moduleSymbol)
+          isPackagePrivate(classSymbol) ||
+          isPackagePrivateModule(moduleSymbol) ||
+          classSymbol.isPrivate
         val developerApi = isDeveloperApi(classSymbol) || isDeveloperApi(moduleSymbol)
         val experimental = isExperimental(classSymbol) || isExperimental(moduleSymbol)
         /* Inner classes defined within a private[spark] class or object are effectively

From 328eb49e6222271337e09188853b29c8f32fb157 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Tue, 17 Nov 2015 13:59:59 -0800
Subject: [PATCH 732/896] [SPARK-11729] Replace example code in
 ml-linear-methods.md using include_example

JIRA link: https://issues.apache.org/jira/browse/SPARK-11729

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9713 from yinxusen/SPARK-11729.
---
 docs/ml-linear-methods.md                     | 218 +-----------------
 ...LinearRegressionWithElasticNetExample.java |  65 ++++++
 .../JavaLogisticRegressionSummaryExample.java |  84 +++++++
 ...gisticRegressionWithElasticNetExample.java |  55 +++++
 .../ml/linear_regression_with_elastic_net.py  |  44 ++++
 .../logistic_regression_with_elastic_net.py   |  44 ++++
 ...inearRegressionWithElasticNetExample.scala |  61 +++++
 .../ml/LogisticRegressionSummaryExample.scala |  77 +++++++
 ...isticRegressionWithElasticNetExample.scala |  53 +++++
 9 files changed, 491 insertions(+), 210 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionSummaryExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java
 create mode 100644 examples/src/main/python/ml/linear_regression_with_elastic_net.py
 create mode 100644 examples/src/main/python/ml/logistic_regression_with_elastic_net.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionSummaryExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionWithElasticNetExample.scala

diff --git a/docs/ml-linear-methods.md b/docs/ml-linear-methods.md
index 85edfd373465..0c13d7d0c82b 100644
--- a/docs/ml-linear-methods.md
+++ b/docs/ml-linear-methods.md
@@ -57,77 +57,15 @@ $\alpha$ and `regParam` corresponds to $\lambda$.
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
-{% highlight scala %}
-import org.apache.spark.ml.classification.LogisticRegression
-
-// Load training data
-val training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-val lr = new LogisticRegression()
-  .setMaxIter(10)
-  .setRegParam(0.3)
-  .setElasticNetParam(0.8)
-
-// Fit the model
-val lrModel = lr.fit(training)
-
-// Print the coefficients and intercept for logistic regression
-println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/LogisticRegressionWithElasticNetExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
-{% highlight java %}
-import org.apache.spark.ml.classification.LogisticRegression;
-import org.apache.spark.ml.classification.LogisticRegressionModel;
-import org.apache.spark.SparkConf;
-import org.apache.spark.SparkContext;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.SQLContext;
-
-public class LogisticRegressionWithElasticNetExample {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf()
-      .setAppName("Logistic Regression with Elastic Net Example");
-
-    SparkContext sc = new SparkContext(conf);
-    SQLContext sql = new SQLContext(sc);
-    String path = "data/mllib/sample_libsvm_data.txt";
-
-    // Load training data
-    DataFrame training = sqlContext.read().format("libsvm").load(path);
-
-    LogisticRegression lr = new LogisticRegression()
-      .setMaxIter(10)
-      .setRegParam(0.3)
-      .setElasticNetParam(0.8);
-
-    // Fit the model
-    LogisticRegressionModel lrModel = lr.fit(training);
-
-    // Print the coefficients and intercept for logistic regression
-    System.out.println("Coefficients: " + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
-  }
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
-{% highlight python %}
-from pyspark.ml.classification import LogisticRegression
-
-# Load training data
-training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-lr = LogisticRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
-
-# Fit the model
-lrModel = lr.fit(training)
-
-# Print the coefficients and intercept for logistic regression
-print("Coefficients: " + str(lrModel.coefficients))
-print("Intercept: " + str(lrModel.intercept))
-{% endhighlight %}
+{% include_example python/ml/logistic_regression_with_elastic_net.py %}
 </div>
 
 </div>
@@ -152,33 +90,7 @@ This will likely change when multiclass classification is supported.
 
 Continuing the earlier example:
 
-{% highlight scala %}
-import org.apache.spark.ml.classification.BinaryLogisticRegressionSummary
-
-// Extract the summary from the returned LogisticRegressionModel instance trained in the earlier example
-val trainingSummary = lrModel.summary
-
-// Obtain the objective per iteration.
-val objectiveHistory = trainingSummary.objectiveHistory
-objectiveHistory.foreach(loss => println(loss))
-
-// Obtain the metrics useful to judge performance on test data.
-// We cast the summary to a BinaryLogisticRegressionSummary since the problem is a
-// binary classification problem.
-val binarySummary = trainingSummary.asInstanceOf[BinaryLogisticRegressionSummary]
-
-// Obtain the receiver-operating characteristic as a dataframe and areaUnderROC.
-val roc = binarySummary.roc
-roc.show()
-println(binarySummary.areaUnderROC)
-
-// Set the model threshold to maximize F-Measure
-val fMeasure = binarySummary.fMeasureByThreshold
-val maxFMeasure = fMeasure.select(max("F-Measure")).head().getDouble(0)
-val bestThreshold = fMeasure.where($"F-Measure" === maxFMeasure).
-  select("threshold").head().getDouble(0)
-lrModel.setThreshold(bestThreshold)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/LogisticRegressionSummaryExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
@@ -192,39 +104,7 @@ This will likely change when multiclass classification is supported.
 
 Continuing the earlier example:
 
-{% highlight java %}
-import org.apache.spark.ml.classification.LogisticRegressionTrainingSummary;
-import org.apache.spark.ml.classification.BinaryLogisticRegressionSummary;
-import org.apache.spark.sql.functions;
-
-// Extract the summary from the returned LogisticRegressionModel instance trained in the earlier example
-LogisticRegressionTrainingSummary trainingSummary = lrModel.summary();
-
-// Obtain the loss per iteration.
-double[] objectiveHistory = trainingSummary.objectiveHistory();
-for (double lossPerIteration : objectiveHistory) {
-  System.out.println(lossPerIteration);
-}
-
-// Obtain the metrics useful to judge performance on test data.
-// We cast the summary to a BinaryLogisticRegressionSummary since the problem is a
-// binary classification problem.
-BinaryLogisticRegressionSummary binarySummary = (BinaryLogisticRegressionSummary) trainingSummary;
-
-// Obtain the receiver-operating characteristic as a dataframe and areaUnderROC.
-DataFrame roc = binarySummary.roc();
-roc.show();
-roc.select("FPR").show();
-System.out.println(binarySummary.areaUnderROC());
-
-// Get the threshold corresponding to the maximum F-Measure and rerun LogisticRegression with
-// this selected threshold.
-DataFrame fMeasure = binarySummary.fMeasureByThreshold();
-double maxFMeasure = fMeasure.select(functions.max("F-Measure")).head().getDouble(0);
-double bestThreshold = fMeasure.where(fMeasure.col("F-Measure").equalTo(maxFMeasure)).
-  select("threshold").head().getDouble(0);
-lrModel.setThreshold(bestThreshold);
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaLogisticRegressionSummaryExample.java %}
 </div>
 
 <!--- TODO: Add python model summaries once implemented -->
@@ -244,98 +124,16 @@ regression model and extracting model summary statistics.
 <div class="codetabs">
 
 <div data-lang="scala" markdown="1">
-{% highlight scala %}
-import org.apache.spark.ml.regression.LinearRegression
-
-// Load training data
-val training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-val lr = new LinearRegression()
-  .setMaxIter(10)
-  .setRegParam(0.3)
-  .setElasticNetParam(0.8)
-
-// Fit the model
-val lrModel = lr.fit(training)
-
-// Print the coefficients and intercept for linear regression
-println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
-
-// Summarize the model over the training set and print out some metrics
-val trainingSummary = lrModel.summary
-println(s"numIterations: ${trainingSummary.totalIterations}")
-println(s"objectiveHistory: ${trainingSummary.objectiveHistory.toList}")
-trainingSummary.residuals.show()
-println(s"RMSE: ${trainingSummary.rootMeanSquaredError}")
-println(s"r2: ${trainingSummary.r2}")
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
-{% highlight java %}
-import org.apache.spark.ml.regression.LinearRegression;
-import org.apache.spark.ml.regression.LinearRegressionModel;
-import org.apache.spark.ml.regression.LinearRegressionTrainingSummary;
-import org.apache.spark.mllib.linalg.Vectors;
-import org.apache.spark.SparkConf;
-import org.apache.spark.SparkContext;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.SQLContext;
-
-public class LinearRegressionWithElasticNetExample {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf()
-      .setAppName("Linear Regression with Elastic Net Example");
-
-    SparkContext sc = new SparkContext(conf);
-    SQLContext sql = new SQLContext(sc);
-    String path = "data/mllib/sample_libsvm_data.txt";
-
-    // Load training data
-    DataFrame training = sqlContext.read().format("libsvm").load(path);
-
-    LinearRegression lr = new LinearRegression()
-      .setMaxIter(10)
-      .setRegParam(0.3)
-      .setElasticNetParam(0.8);
-
-    // Fit the model
-    LinearRegressionModel lrModel = lr.fit(training);
-
-    // Print the coefficients and intercept for linear regression
-    System.out.println("Coefficients: " + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
-
-    // Summarize the model over the training set and print out some metrics
-    LinearRegressionTrainingSummary trainingSummary = lrModel.summary();
-    System.out.println("numIterations: " + trainingSummary.totalIterations());
-    System.out.println("objectiveHistory: " + Vectors.dense(trainingSummary.objectiveHistory()));
-    trainingSummary.residuals().show();
-    System.out.println("RMSE: " + trainingSummary.rootMeanSquaredError());
-    System.out.println("r2: " + trainingSummary.r2());
-  }
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 <!--- TODO: Add python model summaries once implemented -->
-{% highlight python %}
-from pyspark.ml.regression import LinearRegression
-
-# Load training data
-training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-lr = LinearRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
-
-# Fit the model
-lrModel = lr.fit(training)
-
-# Print the coefficients and intercept for linear regression
-print("Coefficients: " + str(lrModel.coefficients))
-print("Intercept: " + str(lrModel.intercept))
-
-# Linear regression model summary is not yet supported in Python.
-{% endhighlight %}
+{% include_example python/ml/linear_regression_with_elastic_net.py %}
 </div>
 
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
new file mode 100644
index 000000000000..593f8fb3e9fe
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
@@ -0,0 +1,65 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.regression.LinearRegression;
+import org.apache.spark.ml.regression.LinearRegressionModel;
+import org.apache.spark.ml.regression.LinearRegressionTrainingSummary;
+import org.apache.spark.mllib.linalg.Vectors;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaLinearRegressionWithElasticNetExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaLinearRegressionWithElasticNetExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load training data
+    DataFrame training = sqlContext.read().format("libsvm")
+      .load("data/mllib/sample_libsvm_data.txt");
+
+    LinearRegression lr = new LinearRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8);
+
+    // Fit the model
+    LinearRegressionModel lrModel = lr.fit(training);
+
+    // Print the coefficients and intercept for linear regression
+    System.out.println("Coefficients: "
+      + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
+
+    // Summarize the model over the training set and print out some metrics
+    LinearRegressionTrainingSummary trainingSummary = lrModel.summary();
+    System.out.println("numIterations: " + trainingSummary.totalIterations());
+    System.out.println("objectiveHistory: " + Vectors.dense(trainingSummary.objectiveHistory()));
+    trainingSummary.residuals().show();
+    System.out.println("RMSE: " + trainingSummary.rootMeanSquaredError());
+    System.out.println("r2: " + trainingSummary.r2());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionSummaryExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionSummaryExample.java
new file mode 100644
index 000000000000..986f3b3b28d7
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionSummaryExample.java
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.classification.BinaryLogisticRegressionSummary;
+import org.apache.spark.ml.classification.LogisticRegression;
+import org.apache.spark.ml.classification.LogisticRegressionModel;
+import org.apache.spark.ml.classification.LogisticRegressionTrainingSummary;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.functions;
+// $example off$
+
+public class JavaLogisticRegressionSummaryExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaLogisticRegressionSummaryExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // Load training data
+    DataFrame training = sqlContext.read().format("libsvm")
+      .load("data/mllib/sample_libsvm_data.txt");
+
+    LogisticRegression lr = new LogisticRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8);
+
+    // Fit the model
+    LogisticRegressionModel lrModel = lr.fit(training);
+
+    // $example on$
+    // Extract the summary from the returned LogisticRegressionModel instance trained in the earlier
+    // example
+    LogisticRegressionTrainingSummary trainingSummary = lrModel.summary();
+
+    // Obtain the loss per iteration.
+    double[] objectiveHistory = trainingSummary.objectiveHistory();
+    for (double lossPerIteration : objectiveHistory) {
+      System.out.println(lossPerIteration);
+    }
+
+    // Obtain the metrics useful to judge performance on test data.
+    // We cast the summary to a BinaryLogisticRegressionSummary since the problem is a binary
+    // classification problem.
+    BinaryLogisticRegressionSummary binarySummary =
+      (BinaryLogisticRegressionSummary) trainingSummary;
+
+    // Obtain the receiver-operating characteristic as a dataframe and areaUnderROC.
+    DataFrame roc = binarySummary.roc();
+    roc.show();
+    roc.select("FPR").show();
+    System.out.println(binarySummary.areaUnderROC());
+
+    // Get the threshold corresponding to the maximum F-Measure and rerun LogisticRegression with
+    // this selected threshold.
+    DataFrame fMeasure = binarySummary.fMeasureByThreshold();
+    double maxFMeasure = fMeasure.select(functions.max("F-Measure")).head().getDouble(0);
+    double bestThreshold = fMeasure.where(fMeasure.col("F-Measure").equalTo(maxFMeasure))
+      .select("threshold").head().getDouble(0);
+    lrModel.setThreshold(bestThreshold);
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java
new file mode 100644
index 000000000000..1d28279d72a0
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaLogisticRegressionWithElasticNetExample.java
@@ -0,0 +1,55 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.classification.LogisticRegression;
+import org.apache.spark.ml.classification.LogisticRegressionModel;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaLogisticRegressionWithElasticNetExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaLogisticRegressionWithElasticNetExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load training data
+    DataFrame training = sqlContext.read().format("libsvm")
+      .load("data/mllib/sample_libsvm_data.txt");
+
+    LogisticRegression lr = new LogisticRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8);
+
+    // Fit the model
+    LogisticRegressionModel lrModel = lr.fit(training);
+
+    // Print the coefficients and intercept for logistic regression
+    System.out.println("Coefficients: "
+      + lrModel.coefficients() + " Intercept: " + lrModel.intercept());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/python/ml/linear_regression_with_elastic_net.py b/examples/src/main/python/ml/linear_regression_with_elastic_net.py
new file mode 100644
index 000000000000..b0278276330c
--- /dev/null
+++ b/examples/src/main/python/ml/linear_regression_with_elastic_net.py
@@ -0,0 +1,44 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+from pyspark.sql import SQLContext
+# $example on$
+from pyspark.ml.regression import LinearRegression
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="LinearRegressionWithElasticNet")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load training data
+    training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    lr = LinearRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
+
+    # Fit the model
+    lrModel = lr.fit(training)
+
+    # Print the coefficients and intercept for linear regression
+    print("Coefficients: " + str(lrModel.coefficients))
+    print("Intercept: " + str(lrModel.intercept))
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/python/ml/logistic_regression_with_elastic_net.py b/examples/src/main/python/ml/logistic_regression_with_elastic_net.py
new file mode 100644
index 000000000000..b0b1d27e13bb
--- /dev/null
+++ b/examples/src/main/python/ml/logistic_regression_with_elastic_net.py
@@ -0,0 +1,44 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from __future__ import print_function
+
+from pyspark import SparkContext
+from pyspark.sql import SQLContext
+# $example on$
+from pyspark.ml.classification import LogisticRegression
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="LogisticRegressionWithElasticNet")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load training data
+    training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    lr = LogisticRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
+
+    # Fit the model
+    lrModel = lr.fit(training)
+
+    # Print the coefficients and intercept for logistic regression
+    print("Coefficients: " + str(lrModel.coefficients))
+    print("Intercept: " + str(lrModel.intercept))
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
new file mode 100644
index 000000000000..5a51ece6f9ba
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.regression.LinearRegression
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+object LinearRegressionWithElasticNetExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("LinearRegressionWithElasticNetExample")
+    val sc = new SparkContext(conf)
+    val sqlCtx = new SQLContext(sc)
+
+    // $example on$
+    // Load training data
+    val training = sqlCtx.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    val lr = new LinearRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8)
+
+    // Fit the model
+    val lrModel = lr.fit(training)
+
+    // Print the coefficients and intercept for linear regression
+    println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
+
+    // Summarize the model over the training set and print out some metrics
+    val trainingSummary = lrModel.summary
+    println(s"numIterations: ${trainingSummary.totalIterations}")
+    println(s"objectiveHistory: ${trainingSummary.objectiveHistory.toList}")
+    trainingSummary.residuals.show()
+    println(s"RMSE: ${trainingSummary.rootMeanSquaredError}")
+    println(s"r2: ${trainingSummary.r2}")
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionSummaryExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionSummaryExample.scala
new file mode 100644
index 000000000000..4c420421b670
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionSummaryExample.scala
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.classification.{BinaryLogisticRegressionSummary, LogisticRegression}
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.sql.functions.max
+import org.apache.spark.{SparkConf, SparkContext}
+
+object LogisticRegressionSummaryExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("LogisticRegressionSummaryExample")
+    val sc = new SparkContext(conf)
+    val sqlCtx = new SQLContext(sc)
+    import sqlCtx.implicits._
+
+    // Load training data
+    val training = sqlCtx.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    val lr = new LogisticRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8)
+
+    // Fit the model
+    val lrModel = lr.fit(training)
+
+    // $example on$
+    // Extract the summary from the returned LogisticRegressionModel instance trained in the earlier
+    // example
+    val trainingSummary = lrModel.summary
+
+    // Obtain the objective per iteration.
+    val objectiveHistory = trainingSummary.objectiveHistory
+    objectiveHistory.foreach(loss => println(loss))
+
+    // Obtain the metrics useful to judge performance on test data.
+    // We cast the summary to a BinaryLogisticRegressionSummary since the problem is a
+    // binary classification problem.
+    val binarySummary = trainingSummary.asInstanceOf[BinaryLogisticRegressionSummary]
+
+    // Obtain the receiver-operating characteristic as a dataframe and areaUnderROC.
+    val roc = binarySummary.roc
+    roc.show()
+    println(binarySummary.areaUnderROC)
+
+    // Set the model threshold to maximize F-Measure
+    val fMeasure = binarySummary.fMeasureByThreshold
+    val maxFMeasure = fMeasure.select(max("F-Measure")).head().getDouble(0)
+    val bestThreshold = fMeasure.where($"F-Measure" === maxFMeasure)
+      .select("threshold").head().getDouble(0)
+    lrModel.setThreshold(bestThreshold)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionWithElasticNetExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionWithElasticNetExample.scala
new file mode 100644
index 000000000000..9ee995b52c90
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LogisticRegressionWithElasticNetExample.scala
@@ -0,0 +1,53 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+// $example on$
+import org.apache.spark.ml.classification.LogisticRegression
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+object LogisticRegressionWithElasticNetExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("LogisticRegressionWithElasticNetExample")
+    val sc = new SparkContext(conf)
+    val sqlCtx = new SQLContext(sc)
+
+    // $example on$
+    // Load training data
+    val training = sqlCtx.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    val lr = new LogisticRegression()
+      .setMaxIter(10)
+      .setRegParam(0.3)
+      .setElasticNetParam(0.8)
+
+    // Fit the model
+    val lrModel = lr.fit(training)
+
+    // Print the coefficients and intercept for logistic regression
+    println(s"Coefficients: ${lrModel.coefficients} Intercept: ${lrModel.intercept}")
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println

From 6eb7008b7f33a36b06d0615b68cc21ed90ad1d8a Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 17 Nov 2015 14:03:49 -0800
Subject: [PATCH 733/896] [SPARK-11763][ML] Add save,load to LogisticRegression
 Estimator

Add save/load to LogisticRegression Estimator, and refactor tests a little to make it easier to add similar support to other Estimator, Model pairs.

Moved LogisticRegressionReader/Writer to within LogisticRegressionModel

CC: mengxr

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9749 from jkbradley/lr-io-2.
---
 .../classification/LogisticRegression.scala   | 91 ++++++++++---------
 .../org/apache/spark/ml/util/ReadWrite.scala  |  1 +
 .../org/apache/spark/ml/PipelineSuite.scala   |  7 --
 .../ml/classification/ClassifierSuite.scala   | 32 +++++++
 .../LogisticRegressionSuite.scala             | 37 ++++++--
 .../ProbabilisticClassifierSuite.scala        | 14 +++
 .../spark/ml/util/DefaultReadWriteTest.scala  | 50 +++++++++-
 7 files changed, 173 insertions(+), 59 deletions(-)
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/classification/ClassifierSuite.scala

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index a88f52674102..71c2533bcbf4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -157,7 +157,7 @@ private[classification] trait LogisticRegressionParams extends ProbabilisticClas
 @Experimental
 class LogisticRegression(override val uid: String)
   extends ProbabilisticClassifier[Vector, LogisticRegression, LogisticRegressionModel]
-  with LogisticRegressionParams with Logging {
+  with LogisticRegressionParams with Writable with Logging {
 
   def this() = this(Identifiable.randomUID("logreg"))
 
@@ -385,6 +385,12 @@ class LogisticRegression(override val uid: String)
   }
 
   override def copy(extra: ParamMap): LogisticRegression = defaultCopy(extra)
+
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+object LogisticRegression extends Readable[LogisticRegression] {
+  override def read: Reader[LogisticRegression] = new DefaultParamsReader[LogisticRegression]
 }
 
 /**
@@ -517,61 +523,62 @@ class LogisticRegressionModel private[ml] (
    *
    * For [[LogisticRegressionModel]], this does NOT currently save the training [[summary]].
    * An option to save [[summary]] may be added in the future.
+   *
+   * This also does not save the [[parent]] currently.
    */
-  override def write: Writer = new LogisticRegressionWriter(this)
-}
-
-
-/** [[Writer]] instance for [[LogisticRegressionModel]] */
-private[classification] class LogisticRegressionWriter(instance: LogisticRegressionModel)
-  extends Writer with Logging {
-
-  private case class Data(
-      numClasses: Int,
-      numFeatures: Int,
-      intercept: Double,
-      coefficients: Vector)
-
-  override protected def saveImpl(path: String): Unit = {
-    // Save metadata and Params
-    DefaultParamsWriter.saveMetadata(instance, path, sc)
-    // Save model data: numClasses, numFeatures, intercept, coefficients
-    val data = Data(instance.numClasses, instance.numFeatures, instance.intercept,
-      instance.coefficients)
-    val dataPath = new Path(path, "data").toString
-    sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
-  }
+  override def write: Writer = new LogisticRegressionModel.LogisticRegressionModelWriter(this)
 }
 
 
 object LogisticRegressionModel extends Readable[LogisticRegressionModel] {
 
-  override def read: Reader[LogisticRegressionModel] = new LogisticRegressionReader
+  override def read: Reader[LogisticRegressionModel] = new LogisticRegressionModelReader
 
   override def load(path: String): LogisticRegressionModel = read.load(path)
-}
 
+  /** [[Writer]] instance for [[LogisticRegressionModel]] */
+  private[classification] class LogisticRegressionModelWriter(instance: LogisticRegressionModel)
+    extends Writer with Logging {
+
+    private case class Data(
+        numClasses: Int,
+        numFeatures: Int,
+        intercept: Double,
+        coefficients: Vector)
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: numClasses, numFeatures, intercept, coefficients
+      val data = Data(instance.numClasses, instance.numFeatures, instance.intercept,
+        instance.coefficients)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
+    }
+  }
 
-private[classification] class LogisticRegressionReader extends Reader[LogisticRegressionModel] {
+  private[classification] class LogisticRegressionModelReader
+    extends Reader[LogisticRegressionModel] {
 
-  /** Checked against metadata when loading model */
-  private val className = "org.apache.spark.ml.classification.LogisticRegressionModel"
+    /** Checked against metadata when loading model */
+    private val className = "org.apache.spark.ml.classification.LogisticRegressionModel"
 
-  override def load(path: String): LogisticRegressionModel = {
-    val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+    override def load(path: String): LogisticRegressionModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
 
-    val dataPath = new Path(path, "data").toString
-    val data = sqlContext.read.format("parquet").load(dataPath)
-      .select("numClasses", "numFeatures", "intercept", "coefficients").head()
-    // We will need numClasses, numFeatures in the future for multinomial logreg support.
-    // val numClasses = data.getInt(0)
-    // val numFeatures = data.getInt(1)
-    val intercept = data.getDouble(2)
-    val coefficients = data.getAs[Vector](3)
-    val model = new LogisticRegressionModel(metadata.uid, coefficients, intercept)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.format("parquet").load(dataPath)
+        .select("numClasses", "numFeatures", "intercept", "coefficients").head()
+      // We will need numClasses, numFeatures in the future for multinomial logreg support.
+      // val numClasses = data.getInt(0)
+      // val numFeatures = data.getInt(1)
+      val intercept = data.getDouble(2)
+      val coefficients = data.getAs[Vector](3)
+      val model = new LogisticRegressionModel(metadata.uid, coefficients, intercept)
 
-    DefaultParamsReader.getAndSetParams(model, metadata)
-    model
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
   }
 }
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index 3169c9e9af5b..dddb72af5ba7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -217,6 +217,7 @@ private[ml] object DefaultParamsWriter {
  * (json4s-serializable) params and no data. This will not handle more complex params or types with
  * data (e.g., models with coefficients).
  * @tparam T ML instance type
+ * TODO: Consider adding check for correct class name.
  */
 private[ml] class DefaultParamsReader[T] extends Reader[T] {
 
diff --git a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
index 484026b1ba9a..7f5c3895acb0 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
@@ -149,13 +149,6 @@ class PipelineSuite extends SparkFunSuite with MLlibTestSparkContext with Defaul
     assert(pipeline2.stages(0).isInstanceOf[WritableStage])
     val writableStage2 = pipeline2.stages(0).asInstanceOf[WritableStage]
     assert(writableStage.getIntParam === writableStage2.getIntParam)
-
-    val path = new File(tempDir, pipeline.uid).getPath
-    val stagesDir = new Path(path, "stages").toString
-    val expectedStagePath = SharedReadWrite.getStagePath(writableStage.uid, 0, 1, stagesDir)
-    assert(FileSystem.get(sc.hadoopConfiguration).exists(new Path(expectedStagePath)),
-      s"Expected stage 0 of 1 with uid ${writableStage.uid} in Pipeline with uid ${pipeline.uid}" +
-        s" to be saved to path: $expectedStagePath")
   }
 
   test("PipelineModel read/write: getStagePath") {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/ClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/ClassifierSuite.scala
new file mode 100644
index 000000000000..d0e3fe7ad14b
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/ClassifierSuite.scala
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.classification
+
+object ClassifierSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "rawPredictionCol" -> "myRawPrediction"
+  )
+
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index 51b06b7eb6d5..48ce1bb63068 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -873,15 +873,34 @@ class LogisticRegressionSuite
   }
 
   test("read/write") {
-    // Set some Params to make sure set Params are serialized.
+    def checkModelData(model: LogisticRegressionModel, model2: LogisticRegressionModel): Unit = {
+      assert(model.intercept === model2.intercept)
+      assert(model.coefficients.toArray === model2.coefficients.toArray)
+      assert(model.numClasses === model2.numClasses)
+      assert(model.numFeatures === model2.numFeatures)
+    }
     val lr = new LogisticRegression()
-      .setElasticNetParam(0.1)
-      .setMaxIter(2)
-      .fit(dataset)
-    val lr2 = testDefaultReadWrite(lr)
-    assert(lr.intercept === lr2.intercept)
-    assert(lr.coefficients.toArray === lr2.coefficients.toArray)
-    assert(lr.numClasses === lr2.numClasses)
-    assert(lr.numFeatures === lr2.numFeatures)
+    testEstimatorAndModelReadWrite(lr, dataset, LogisticRegressionSuite.allParamSettings,
+      checkModelData)
   }
 }
+
+object LogisticRegressionSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = ProbabilisticClassifierSuite.allParamSettings ++ Map(
+    "probabilityCol" -> "myProbability",
+    "thresholds" -> Array(0.4, 0.6),
+    "regParam" -> 0.01,
+    "elasticNetParam" -> 0.1,
+    "maxIter" -> 2,  // intentionally small
+    "fitIntercept" -> false,
+    "tol" -> 0.8,
+    "standardization" -> false,
+    "threshold" -> 0.6
+  )
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
index fb5f00e0646c..cfa75ecf387c 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/ProbabilisticClassifierSuite.scala
@@ -57,3 +57,17 @@ class ProbabilisticClassifierSuite extends SparkFunSuite {
     assert(testModel.friendlyPredict(Vectors.dense(Array(1.0, 2.0))) === 1.0)
   }
 }
+
+object ProbabilisticClassifierSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = ClassifierSuite.allParamSettings ++ Map(
+    "probabilityCol" -> "myProbability",
+    "thresholds" -> Array(0.4, 0.6)
+  )
+
+}
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index c37f0503f133..dd1e8acce941 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -22,13 +22,17 @@ import java.io.{File, IOException}
 import org.scalatest.Suite
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.{Model, Estimator}
 import org.apache.spark.ml.param._
 import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.sql.DataFrame
 
 trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
 
   /**
    * Checks "overwrite" option and params.
+   * This saves to and loads from [[tempDir]], but creates a subdirectory with a random name
+   * in order to avoid conflicts from multiple calls to this method.
    * @param instance ML instance to test saving/loading
    * @param testParams  If true, then test values of Params.  Otherwise, just test overwrite option.
    * @tparam T ML instance type
@@ -38,7 +42,10 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
       instance: T,
       testParams: Boolean = true): T = {
     val uid = instance.uid
-    val path = new File(tempDir, uid).getPath
+    val subdirName = Identifiable.randomUID("test")
+
+    val subdir = new File(tempDir, subdirName)
+    val path = new File(subdir, uid).getPath
 
     instance.save(path)
     intercept[IOException] {
@@ -69,6 +76,47 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
     assert(another.uid === instance.uid)
     another
   }
+
+  /**
+   * Default test for Estimator, Model pairs:
+   *  - Explicitly set Params, and train model
+   *  - Test save/load using [[testDefaultReadWrite()]] on Estimator and Model
+   *  - Check Params on Estimator and Model
+   *
+   * This requires that the [[Estimator]] and [[Model]] share the same set of [[Param]]s.
+   * @param estimator  Estimator to test
+   * @param dataset  Dataset to pass to [[Estimator.fit()]]
+   * @param testParams  Set of [[Param]] values to set in estimator
+   * @param checkModelData  Method which takes the original and loaded [[Model]] and compares their
+   *                        data.  This method does not need to check [[Param]] values.
+   * @tparam E  Type of [[Estimator]]
+   * @tparam M  Type of [[Model]] produced by estimator
+   */
+  def testEstimatorAndModelReadWrite[E <: Estimator[M] with Writable, M <: Model[M] with Writable](
+      estimator: E,
+      dataset: DataFrame,
+      testParams: Map[String, Any],
+      checkModelData: (M, M) => Unit): Unit = {
+    // Set some Params to make sure set Params are serialized.
+    testParams.foreach { case (p, v) =>
+      estimator.set(estimator.getParam(p), v)
+    }
+    val model = estimator.fit(dataset)
+
+    // Test Estimator save/load
+    val estimator2 = testDefaultReadWrite(estimator)
+    testParams.foreach { case (p, v) =>
+      val param = estimator.getParam(p)
+      assert(estimator.get(param).get === estimator2.get(param).get)
+    }
+
+    // Test Model save/load
+    val model2 = testDefaultReadWrite(model)
+    testParams.foreach { case (p, v) =>
+      val param = model.getParam(p)
+      assert(model.get(param).get === model2.get(param).get)
+    }
+  }
 }
 
 class MyParams(override val uid: String) extends Params with Writable {

From 3e9e6380236985ec5b51b459f8c61f964a76ff8b Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Tue, 17 Nov 2015 14:04:49 -0800
Subject: [PATCH 734/896] [SPARK-11764][ML] make Param.jsonEncode/jsonDecode
 support Vector

This PR makes the default read/write work with simple transformers/estimators that have params of type `Param[Vector]`. jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9776 from mengxr/SPARK-11764.
---
 .../org/apache/spark/ml/param/params.scala    | 12 ++++++++--
 .../apache/spark/ml/param/ParamsSuite.scala   | 22 +++++++++++++++----
 2 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
index c9325709187c..d182b0a98896 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/param/params.scala
@@ -29,6 +29,7 @@ import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 
 /**
  * :: DeveloperApi ::
@@ -88,9 +89,11 @@ class Param[T](val parent: String, val name: String, val doc: String, val isVali
     value match {
       case x: String =>
         compact(render(JString(x)))
+      case v: Vector =>
+        v.toJson
       case _ =>
         throw new NotImplementedError(
-          "The default jsonEncode only supports string. " +
+          "The default jsonEncode only supports string and vector. " +
             s"${this.getClass.getName} must override jsonEncode for ${value.getClass.getName}.")
     }
   }
@@ -100,9 +103,14 @@ class Param[T](val parent: String, val name: String, val doc: String, val isVali
     parse(json) match {
       case JString(x) =>
         x.asInstanceOf[T]
+      case JObject(v) =>
+        val keys = v.map(_._1)
+        assert(keys.contains("type") && keys.contains("values"),
+          s"Expect a JSON serialized vector but cannot find fields 'type' and 'values' in $json.")
+        Vectors.fromJson(json).asInstanceOf[T]
       case _ =>
         throw new NotImplementedError(
-          "The default jsonDecode only supports string. " +
+          "The default jsonDecode only supports string and vector. " +
             s"${this.getClass.getName} must override jsonDecode to support its value type.")
     }
   }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
index eeb03dba2f82..a1878be747ce 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/param/ParamsSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.param
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 
 class ParamsSuite extends SparkFunSuite {
 
@@ -80,7 +81,7 @@ class ParamsSuite extends SparkFunSuite {
       }
     }
 
-    { // StringParam
+    { // Param[String]
       val param = new Param[String](dummy, "name", "doc")
       // Currently we do not support null.
       for (value <- Seq("", "1", "abc", "quote\"", "newline\n")) {
@@ -89,6 +90,19 @@ class ParamsSuite extends SparkFunSuite {
       }
     }
 
+    { // Param[Vector]
+      val param = new Param[Vector](dummy, "name", "doc")
+      val values = Seq(
+        Vectors.dense(Array.empty[Double]),
+        Vectors.dense(0.0, 2.0),
+        Vectors.sparse(0, Array.empty, Array.empty),
+        Vectors.sparse(2, Array(1), Array(2.0)))
+      for (value <- values) {
+        val json = param.jsonEncode(value)
+        assert(param.jsonDecode(json) === value)
+      }
+    }
+
     { // IntArrayParam
       val param = new IntArrayParam(dummy, "name", "doc")
       val values: Seq[Array[Int]] = Seq(
@@ -138,7 +152,7 @@ class ParamsSuite extends SparkFunSuite {
   test("param") {
     val solver = new TestParams()
     val uid = solver.uid
-    import solver.{maxIter, inputCol}
+    import solver.{inputCol, maxIter}
 
     assert(maxIter.name === "maxIter")
     assert(maxIter.doc === "maximum number of iterations (>= 0)")
@@ -181,7 +195,7 @@ class ParamsSuite extends SparkFunSuite {
 
   test("param map") {
     val solver = new TestParams()
-    import solver.{maxIter, inputCol}
+    import solver.{inputCol, maxIter}
 
     val map0 = ParamMap.empty
 
@@ -220,7 +234,7 @@ class ParamsSuite extends SparkFunSuite {
 
   test("params") {
     val solver = new TestParams()
-    import solver.{handleInvalid, maxIter, inputCol}
+    import solver.{handleInvalid, inputCol, maxIter}
 
     val params = solver.params
     assert(params.length === 3)

From 936bc0bcbf957fa1d7cb5cfe88d628c830df5981 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Tue, 17 Nov 2015 14:23:28 -0800
Subject: [PATCH 735/896] [SPARK-11786][CORE] Tone down messages from akka
 error monitor.

There events happen normally during the app's lifecycle, so printing
out ERROR logs all the time is misleading, and can actually affect usability
of interactive shells.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9772 from vanzin/SPARK-11786.
---
 core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index 3fad595a0d0b..059a7e10ec12 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -263,7 +263,7 @@ private[akka] class ErrorMonitor extends Actor with ActorLogReceive with Logging
   }
 
   override def receiveWithLogging: Actor.Receive = {
-    case Error(cause: Throwable, _, _, message: String) => logError(message, cause)
+    case Error(cause: Throwable, _, _, message: String) => logDebug(message, cause)
   }
 }
 

From 928d631625297857fb6998fbeb0696917fbfd60f Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Tue, 17 Nov 2015 14:48:29 -0800
Subject: [PATCH 736/896] [SPARK-11740][STREAMING] Fix the race condition of
 two checkpoints in a batch

We will do checkpoint when generating a batch and completing a batch. When the processing time of a batch is greater than the batch interval, checkpointing for completing an old batch may run after checkpointing for generating a new batch. If this happens, checkpoint of an old batch actually has the latest information, so we want to recovery from it. This PR will use the latest checkpoint time as the file name, so that we can always recovery from the latest checkpoint file.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9707 from zsxwing/fix-checkpoint.
---
 python/pyspark/streaming/tests.py             |  9 +++----
 .../apache/spark/streaming/Checkpoint.scala   | 18 +++++++++++--
 .../spark/streaming/CheckpointSuite.scala     | 27 +++++++++++++++++--
 3 files changed, 45 insertions(+), 9 deletions(-)

diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 2983028413bb..ff95639146e5 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -753,7 +753,6 @@ def tearDown(self):
         if self.cpd is not None:
             shutil.rmtree(self.cpd)
 
-    @unittest.skip("Enable it when we fix the checkpoint bug")
     def test_get_or_create_and_get_active_or_create(self):
         inputd = tempfile.mkdtemp()
         outputd = tempfile.mkdtemp() + "/"
@@ -822,11 +821,11 @@ def check_output(n):
         # Verify that getOrCreate() uses existing SparkContext
         self.ssc.stop(True, True)
         time.sleep(1)
-        sc = SparkContext(SparkConf())
+        self.sc = SparkContext(conf=SparkConf())
         self.setupCalled = False
         self.ssc = StreamingContext.getOrCreate(self.cpd, setup)
         self.assertFalse(self.setupCalled)
-        self.assertTrue(self.ssc.sparkContext == sc)
+        self.assertTrue(self.ssc.sparkContext == self.sc)
 
         # Verify the getActiveOrCreate() recovers from checkpoint files
         self.ssc.stop(True, True)
@@ -845,11 +844,11 @@ def check_output(n):
         # Verify that getActiveOrCreate() uses existing SparkContext
         self.ssc.stop(True, True)
         time.sleep(1)
-        self.sc = SparkContext(SparkConf())
+        self.sc = SparkContext(conf=SparkConf())
         self.setupCalled = False
         self.ssc = StreamingContext.getActiveOrCreate(self.cpd, setup)
         self.assertFalse(self.setupCalled)
-        self.assertTrue(self.ssc.sparkContext == sc)
+        self.assertTrue(self.ssc.sparkContext == self.sc)
 
         # Verify that getActiveOrCreate() calls setup() in absence of checkpoint files
         self.ssc.stop(True, True)
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
index 0cd55d9aec2c..fd0e8d5d690b 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/Checkpoint.scala
@@ -187,16 +187,30 @@ class CheckpointWriter(
   private var stopped = false
   private var fs_ : FileSystem = _
 
+  @volatile private var latestCheckpointTime: Time = null
+
   class CheckpointWriteHandler(
       checkpointTime: Time,
       bytes: Array[Byte],
       clearCheckpointDataLater: Boolean) extends Runnable {
     def run() {
+      if (latestCheckpointTime == null || latestCheckpointTime < checkpointTime) {
+        latestCheckpointTime = checkpointTime
+      }
       var attempts = 0
       val startTime = System.currentTimeMillis()
       val tempFile = new Path(checkpointDir, "temp")
-      val checkpointFile = Checkpoint.checkpointFile(checkpointDir, checkpointTime)
-      val backupFile = Checkpoint.checkpointBackupFile(checkpointDir, checkpointTime)
+      // We will do checkpoint when generating a batch and completing a batch. When the processing
+      // time of a batch is greater than the batch interval, checkpointing for completing an old
+      // batch may run after checkpointing of a new batch. If this happens, checkpoint of an old
+      // batch actually has the latest information, so we want to recovery from it. Therefore, we
+      // also use the latest checkpoint time as the file name, so that we can recovery from the
+      // latest checkpoint file.
+      //
+      // Note: there is only one thread writting the checkpoint files, so we don't need to worry
+      // about thread-safety.
+      val checkpointFile = Checkpoint.checkpointFile(checkpointDir, latestCheckpointTime)
+      val backupFile = Checkpoint.checkpointBackupFile(checkpointDir, latestCheckpointTime)
 
       while (attempts < MAX_ATTEMPTS && !stopped) {
         attempts += 1
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
index 84f5294aa39c..b1cbc7163bee 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/CheckpointSuite.scala
@@ -18,7 +18,6 @@
 package org.apache.spark.streaming
 
 import java.io.{ObjectOutputStream, ByteArrayOutputStream, ByteArrayInputStream, File}
-import org.apache.spark.TestUtils
 
 import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
 import scala.reflect.ClassTag
@@ -30,11 +29,13 @@ import org.apache.hadoop.fs.{FileSystem, Path}
 import org.apache.hadoop.io.{IntWritable, Text}
 import org.apache.hadoop.mapred.TextOutputFormat
 import org.apache.hadoop.mapreduce.lib.output.{TextOutputFormat => NewTextOutputFormat}
+import org.mockito.Mockito.mock
 import org.scalatest.concurrent.Eventually._
 import org.scalatest.time.SpanSugar._
 
+import org.apache.spark.TestUtils
 import org.apache.spark.streaming.dstream.{DStream, FileInputDStream}
-import org.apache.spark.streaming.scheduler.{ConstantEstimator, RateTestInputDStream, RateTestReceiver}
+import org.apache.spark.streaming.scheduler._
 import org.apache.spark.util.{MutableURLClassLoader, Clock, ManualClock, Utils}
 
 /**
@@ -611,6 +612,28 @@ class CheckpointSuite extends TestSuiteBase {
     assert(ois.readObject().asInstanceOf[Class[_]].getName == "[LtestClz;")
   }
 
+  test("SPARK-11267: the race condition of two checkpoints in a batch") {
+    val jobGenerator = mock(classOf[JobGenerator])
+    val checkpointDir = Utils.createTempDir().toString
+    val checkpointWriter =
+      new CheckpointWriter(jobGenerator, conf, checkpointDir, new Configuration())
+    val bytes1 = Array.fill[Byte](10)(1)
+    new checkpointWriter.CheckpointWriteHandler(
+      Time(2000), bytes1, clearCheckpointDataLater = false).run()
+    val bytes2 = Array.fill[Byte](10)(2)
+    new checkpointWriter.CheckpointWriteHandler(
+      Time(1000), bytes2, clearCheckpointDataLater = true).run()
+    val checkpointFiles = Checkpoint.getCheckpointFiles(checkpointDir).reverse.map { path =>
+      new File(path.toUri)
+    }
+    assert(checkpointFiles.size === 2)
+    // Although bytes2 was written with an old time, it contains the latest status, so we should
+    // try to read from it at first.
+    assert(Files.toByteArray(checkpointFiles(0)) === bytes2)
+    assert(Files.toByteArray(checkpointFiles(1)) === bytes1)
+    checkpointWriter.stop()
+  }
+
   /**
    * Tests a streaming operation under checkpointing, by restarting the operation
    * from checkpoint file and verifying whether the final output is correct.

From 965245d087c18edc6c3d5baddeaf83163e32e330 Mon Sep 17 00:00:00 2001
From: Grace <jie.huang@intel.com>
Date: Tue, 17 Nov 2015 15:43:35 -0800
Subject: [PATCH 737/896] [SPARK-9552] Add force control for killExecutors to
 avoid false killing for those busy executors

By using the dynamic allocation, sometimes it occurs false killing for those busy executors. Some executors with assignments will be killed because of being idle for enough time (say 60 seconds). The root cause is that the Task-Launch listener event is asynchronized.

For example, some executors are under assigning tasks, but not sending out the listener notification yet. Meanwhile, the dynamic allocation's executor idle time is up (e.g., 60 seconds). It will trigger killExecutor event at the same time.
 1. the timer expiration starts before the listener event arrives.
 2. Then, the task is going to run on top of that killed/killing executor. It will lead to task failure finally.

Here is the proposal to fix it. We can add the force control for killExecutor. If the force control is not set (i.e., false), we'd better to check if the executor under killing is idle or busy. If the current executor has some assignment, we should not kill that executor and return back false (to indicate killing failure). In dynamic allocation, we'd better to turn off force killing (i.e., force = false), we will meet killing failure if tries to kill a busy executor. And then, the executor timer won't be invalid. Later on, the task assignment event arrives, we can remove the idle timer accordingly. So that we can avoid false killing for those busy executors in dynamic allocation.

For the rest of usages, the end users can decide if to use force killing or not by themselves.  If to turn on that option, the killExecutor will do the action without any status checking.

Author: Grace <jie.huang@intel.com>
Author: Andrew Or <andrew@databricks.com>
Author: Jie Huang <jie.huang@intel.com>

Closes #7888 from GraceH/forcekill.
---
 .../spark/ExecutorAllocationManager.scala     |  1 +
 .../scala/org/apache/spark/SparkContext.scala |  4 +-
 .../spark/scheduler/TaskSchedulerImpl.scala   | 27 +++++++---
 .../CoarseGrainedSchedulerBackend.scala       | 13 +++--
 .../StandaloneDynamicAllocationSuite.scala    | 52 ++++++++++++++++++-
 5 files changed, 82 insertions(+), 15 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala b/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala
index b93536e6536e..6419218f47c8 100644
--- a/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala
+++ b/core/src/main/scala/org/apache/spark/ExecutorAllocationManager.scala
@@ -509,6 +509,7 @@ private[spark] class ExecutorAllocationManager(
   private def onExecutorBusy(executorId: String): Unit = synchronized {
     logDebug(s"Clearing idle timer for $executorId because it is now running a task")
     removeTimes.remove(executorId)
+    executorsPendingToRemove.remove(executorId)
   }
 
   /**
diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index 4bbd0b038c00..b5645b08f92d 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1461,7 +1461,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   override def killExecutors(executorIds: Seq[String]): Boolean = {
     schedulerBackend match {
       case b: CoarseGrainedSchedulerBackend =>
-        b.killExecutors(executorIds)
+        b.killExecutors(executorIds, replace = false, force = true)
       case _ =>
         logWarning("Killing executors is only supported in coarse-grained mode")
         false
@@ -1499,7 +1499,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
   private[spark] def killAndReplaceExecutor(executorId: String): Boolean = {
     schedulerBackend match {
       case b: CoarseGrainedSchedulerBackend =>
-        b.killExecutors(Seq(executorId), replace = true)
+        b.killExecutors(Seq(executorId), replace = true, force = true)
       case _ =>
         logWarning("Killing executors is only supported in coarse-grained mode")
         false
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
index 5f136690f456..bf0419db1f75 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
@@ -87,8 +87,8 @@ private[spark] class TaskSchedulerImpl(
   // Incrementing task IDs
   val nextTaskId = new AtomicLong(0)
 
-  // Which executor IDs we have executors on
-  val activeExecutorIds = new HashSet[String]
+  // Number of tasks running on each executor
+  private val executorIdToTaskCount = new HashMap[String, Int]
 
   // The set of executors we have on each host; this is used to compute hostsAlive, which
   // in turn is used to decide when we can attain data locality on a given host
@@ -254,6 +254,7 @@ private[spark] class TaskSchedulerImpl(
             val tid = task.taskId
             taskIdToTaskSetManager(tid) = taskSet
             taskIdToExecutorId(tid) = execId
+            executorIdToTaskCount(execId) += 1
             executorsByHost(host) += execId
             availableCpus(i) -= CPUS_PER_TASK
             assert(availableCpus(i) >= 0)
@@ -282,7 +283,7 @@ private[spark] class TaskSchedulerImpl(
     var newExecAvail = false
     for (o <- offers) {
       executorIdToHost(o.executorId) = o.host
-      activeExecutorIds += o.executorId
+      executorIdToTaskCount.getOrElseUpdate(o.executorId, 0)
       if (!executorsByHost.contains(o.host)) {
         executorsByHost(o.host) = new HashSet[String]()
         executorAdded(o.executorId, o.host)
@@ -331,7 +332,8 @@ private[spark] class TaskSchedulerImpl(
         if (state == TaskState.LOST && taskIdToExecutorId.contains(tid)) {
           // We lost this entire executor, so remember that it's gone
           val execId = taskIdToExecutorId(tid)
-          if (activeExecutorIds.contains(execId)) {
+
+          if (executorIdToTaskCount.contains(execId)) {
             removeExecutor(execId,
               SlaveLost(s"Task $tid was lost, so marking the executor as lost as well."))
             failedExecutor = Some(execId)
@@ -341,7 +343,11 @@ private[spark] class TaskSchedulerImpl(
           case Some(taskSet) =>
             if (TaskState.isFinished(state)) {
               taskIdToTaskSetManager.remove(tid)
-              taskIdToExecutorId.remove(tid)
+              taskIdToExecutorId.remove(tid).foreach { execId =>
+                if (executorIdToTaskCount.contains(execId)) {
+                  executorIdToTaskCount(execId) -= 1
+                }
+              }
             }
             if (state == TaskState.FINISHED) {
               taskSet.removeRunningTask(tid)
@@ -462,7 +468,7 @@ private[spark] class TaskSchedulerImpl(
     var failedExecutor: Option[String] = None
 
     synchronized {
-      if (activeExecutorIds.contains(executorId)) {
+      if (executorIdToTaskCount.contains(executorId)) {
         val hostPort = executorIdToHost(executorId)
         logError("Lost executor %s on %s: %s".format(executorId, hostPort, reason))
         removeExecutor(executorId, reason)
@@ -498,7 +504,8 @@ private[spark] class TaskSchedulerImpl(
    * of any running tasks, since the loss reason defines whether we'll fail those tasks.
    */
   private def removeExecutor(executorId: String, reason: ExecutorLossReason) {
-    activeExecutorIds -= executorId
+    executorIdToTaskCount -= executorId
+
     val host = executorIdToHost(executorId)
     val execs = executorsByHost.getOrElse(host, new HashSet)
     execs -= executorId
@@ -535,7 +542,11 @@ private[spark] class TaskSchedulerImpl(
   }
 
   def isExecutorAlive(execId: String): Boolean = synchronized {
-    activeExecutorIds.contains(execId)
+    executorIdToTaskCount.contains(execId)
+  }
+
+  def isExecutorBusy(execId: String): Boolean = synchronized {
+    executorIdToTaskCount.getOrElse(execId, -1) > 0
   }
 
   // By default, rack is unknown
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index 3373caf0d15e..6f0c910c009a 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -453,7 +453,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
    * @return whether the kill request is acknowledged.
    */
   final override def killExecutors(executorIds: Seq[String]): Boolean = synchronized {
-    killExecutors(executorIds, replace = false)
+    killExecutors(executorIds, replace = false, force = false)
   }
 
   /**
@@ -461,9 +461,13 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
    *
    * @param executorIds identifiers of executors to kill
    * @param replace whether to replace the killed executors with new ones
+   * @param force whether to force kill busy executors
    * @return whether the kill request is acknowledged.
    */
-  final def killExecutors(executorIds: Seq[String], replace: Boolean): Boolean = synchronized {
+  final def killExecutors(
+      executorIds: Seq[String],
+      replace: Boolean,
+      force: Boolean): Boolean = synchronized {
     logInfo(s"Requesting to kill executor(s) ${executorIds.mkString(", ")}")
     val (knownExecutors, unknownExecutors) = executorIds.partition(executorDataMap.contains)
     unknownExecutors.foreach { id =>
@@ -471,7 +475,10 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     }
 
     // If an executor is already pending to be removed, do not kill it again (SPARK-9795)
-    val executorsToKill = knownExecutors.filter { id => !executorsPendingToRemove.contains(id) }
+    // If this executor is busy, do not kill it unless we are told to force kill it (SPARK-9552)
+    val executorsToKill = knownExecutors
+      .filter { id => !executorsPendingToRemove.contains(id) }
+      .filter { id => force || !scheduler.isExecutorBusy(id) }
     executorsPendingToRemove ++= executorsToKill
 
     // If we do not wish to replace the executors we kill, sync the target number of executors
diff --git a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
index d145e78834b1..2fa795f84666 100644
--- a/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala
@@ -17,10 +17,11 @@
 
 package org.apache.spark.deploy
 
+import scala.collection.mutable
 import scala.concurrent.duration._
 
 import org.mockito.Mockito.{mock, when}
-import org.scalatest.BeforeAndAfterAll
+import org.scalatest.{BeforeAndAfterAll, PrivateMethodTester}
 import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark._
@@ -29,6 +30,7 @@ import org.apache.spark.deploy.master.ApplicationInfo
 import org.apache.spark.deploy.master.Master
 import org.apache.spark.deploy.worker.Worker
 import org.apache.spark.rpc.{RpcAddress, RpcEndpointRef, RpcEnv}
+import org.apache.spark.scheduler.TaskSchedulerImpl
 import org.apache.spark.scheduler.cluster._
 import org.apache.spark.scheduler.cluster.CoarseGrainedClusterMessages.RegisterExecutor
 
@@ -38,7 +40,8 @@ import org.apache.spark.scheduler.cluster.CoarseGrainedClusterMessages.RegisterE
 class StandaloneDynamicAllocationSuite
   extends SparkFunSuite
   with LocalSparkContext
-  with BeforeAndAfterAll {
+  with BeforeAndAfterAll
+  with PrivateMethodTester {
 
   private val numWorkers = 2
   private val conf = new SparkConf()
@@ -404,6 +407,41 @@ class StandaloneDynamicAllocationSuite
     assert(apps.head.getExecutorLimit === 1)
   }
 
+  test("disable force kill for busy executors (SPARK-9552)") {
+    sc = new SparkContext(appConf)
+    val appId = sc.applicationId
+    eventually(timeout(10.seconds), interval(10.millis)) {
+      val apps = getApplications()
+      assert(apps.size === 1)
+      assert(apps.head.id === appId)
+      assert(apps.head.executors.size === 2)
+      assert(apps.head.getExecutorLimit === Int.MaxValue)
+    }
+    var apps = getApplications()
+    // sync executors between the Master and the driver, needed because
+    // the driver refuses to kill executors it does not know about
+    syncExecutors(sc)
+    val executors = getExecutorIds(sc)
+    assert(executors.size === 2)
+
+    // simulate running a task on the executor
+    val getMap = PrivateMethod[mutable.HashMap[String, Int]]('executorIdToTaskCount)
+    val taskScheduler = sc.taskScheduler.asInstanceOf[TaskSchedulerImpl]
+    val executorIdToTaskCount = taskScheduler invokePrivate getMap()
+    executorIdToTaskCount(executors.head) = 1
+    // kill the busy executor without force; this should fail
+    assert(killExecutor(sc, executors.head, force = false))
+    apps = getApplications()
+    assert(apps.head.executors.size === 2)
+
+    // force kill busy executor
+    assert(killExecutor(sc, executors.head, force = true))
+    apps = getApplications()
+    // kill executor successfully
+    assert(apps.head.executors.size === 1)
+
+  }
+
   // ===============================
   // | Utility methods for testing |
   // ===============================
@@ -455,6 +493,16 @@ class StandaloneDynamicAllocationSuite
     sc.killExecutors(getExecutorIds(sc).take(n))
   }
 
+  /** Kill the given executor, specifying whether to force kill it. */
+  private def killExecutor(sc: SparkContext, executorId: String, force: Boolean): Boolean = {
+    syncExecutors(sc)
+    sc.schedulerBackend match {
+      case b: CoarseGrainedSchedulerBackend =>
+        b.killExecutors(Seq(executorId), replace = false, force)
+      case _ => fail("expected coarse grained scheduler")
+    }
+  }
+
   /**
    * Return a list of executor IDs belonging to this application.
    *

From e29656f8e7fa19686b448292e20d8bbf07ab9f11 Mon Sep 17 00:00:00 2001
From: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>
Date: Tue, 17 Nov 2015 15:45:39 -0800
Subject: [PATCH 738/896] [MINOR] Correct comments in JavaDirectKafkaWordCount

Author: Rohan Bhanderi <rohan.bhanderi@sjsu.edu>

Closes #9781 from RohanBhanderi/patch-3.
---
 .../examples/streaming/JavaDirectKafkaWordCount.java      | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/examples/src/main/java/org/apache/spark/examples/streaming/JavaDirectKafkaWordCount.java b/examples/src/main/java/org/apache/spark/examples/streaming/JavaDirectKafkaWordCount.java
index bab9f2478e77..f9a5e7f69ffe 100644
--- a/examples/src/main/java/org/apache/spark/examples/streaming/JavaDirectKafkaWordCount.java
+++ b/examples/src/main/java/org/apache/spark/examples/streaming/JavaDirectKafkaWordCount.java
@@ -35,12 +35,12 @@
 
 /**
  * Consumes messages from one or more topics in Kafka and does wordcount.
- * Usage: DirectKafkaWordCount <brokers> <topics>
+ * Usage: JavaDirectKafkaWordCount <brokers> <topics>
  *   <brokers> is a list of one or more Kafka brokers
  *   <topics> is a list of one or more kafka topics to consume from
  *
  * Example:
- *    $ bin/run-example streaming.KafkaWordCount broker1-host:port,broker2-host:port topic1,topic2
+ *    $ bin/run-example streaming.JavaDirectKafkaWordCount broker1-host:port,broker2-host:port topic1,topic2
  */
 
 public final class JavaDirectKafkaWordCount {
@@ -48,7 +48,7 @@ public final class JavaDirectKafkaWordCount {
 
   public static void main(String[] args) {
     if (args.length < 2) {
-      System.err.println("Usage: DirectKafkaWordCount <brokers> <topics>\n" +
+      System.err.println("Usage: JavaDirectKafkaWordCount <brokers> <topics>\n" +
           "  <brokers> is a list of one or more Kafka brokers\n" +
           "  <topics> is a list of one or more kafka topics to consume from\n\n");
       System.exit(1);
@@ -59,7 +59,7 @@ public static void main(String[] args) {
     String brokers = args[0];
     String topics = args[1];
 
-    // Create context with 2 second batch interval
+    // Create context with a 2 seconds batch interval
     SparkConf sparkConf = new SparkConf().setAppName("JavaDirectKafkaWordCount");
     JavaStreamingContext jssc = new JavaStreamingContext(sparkConf, Durations.seconds(2));
 

From 3720b1480c7d050ca20f98d65762224ae5639607 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Tue, 17 Nov 2015 15:47:39 -0800
Subject: [PATCH 739/896] [SPARK-11790][STREAMING][TESTS] Increase the
 connection timeout

Sometimes, EmbeddedZookeeper may need more than 6 seconds to setup up in a slow Jenkins worker. So just increase the timeout, it won't increase the test time if the test passes.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9778 from zsxwing/SPARK-11790.
---
 .../scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala
index c9fd715d3d55..86394ea8a685 100644
--- a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala
+++ b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaTestUtils.scala
@@ -52,7 +52,7 @@ private[kafka] class KafkaTestUtils extends Logging {
   // Zookeeper related configurations
   private val zkHost = "localhost"
   private var zkPort: Int = 0
-  private val zkConnectionTimeout = 6000
+  private val zkConnectionTimeout = 60000
   private val zkSessionTimeout = 6000
 
   private var zookeeper: EmbeddedZookeeper = _

From 52c734b589277267be07e245c959199db92aa189 Mon Sep 17 00:00:00 2001
From: Holden Karau <holden@us.ibm.com>
Date: Tue, 17 Nov 2015 15:51:03 -0800
Subject: [PATCH 740/896] [SPARK-11771][YARN][TRIVIAL] maximum memory in yarn
 is controlled by two params have both in error msg

When we exceed the max memory tell users to increase both params instead of just the one.

Author: Holden Karau <holden@us.ibm.com>

Closes #9758 from holdenk/SPARK-11771-maximum-memory-in-yarn-is-controlled-by-two-params-have-both-in-error-msg.
---
 yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index a3f33d80184a..ba799884f568 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -258,7 +258,8 @@ private[spark] class Client(
     if (executorMem > maxMem) {
       throw new IllegalArgumentException(s"Required executor memory (${args.executorMemory}" +
         s"+$executorMemoryOverhead MB) is above the max threshold ($maxMem MB) of this cluster! " +
-        "Please increase the value of 'yarn.scheduler.maximum-allocation-mb'.")
+        "Please check the values of 'yarn.scheduler.maximum-allocation-mb' and/or " +
+        "'yarn.nodemanager.resource.memory-mb'.")
     }
     val amMem = args.amMemory + amMemoryOverhead
     if (amMem > maxMem) {

From b362d50fca30693f97bd859984157bb8a76d48a1 Mon Sep 17 00:00:00 2001
From: Jacek Lewandowski <lewandowski.jacek@gmail.com>
Date: Tue, 17 Nov 2015 15:57:43 -0800
Subject: [PATCH 741/896] [SPARK-11726] Throw exception on timeout when waiting
 for REST server response

Author: Jacek Lewandowski <lewandowski.jacek@gmail.com>

Closes #9692 from jacek-lewandowski/SPARK-11726.
---
 .../spark/deploy/rest/RestSubmissionClient.scala   | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/rest/RestSubmissionClient.scala b/core/src/main/scala/org/apache/spark/deploy/rest/RestSubmissionClient.scala
index 957a928bc402..f0dd667ea1b2 100644
--- a/core/src/main/scala/org/apache/spark/deploy/rest/RestSubmissionClient.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/rest/RestSubmissionClient.scala
@@ -19,16 +19,19 @@ package org.apache.spark.deploy.rest
 
 import java.io.{DataOutputStream, FileNotFoundException}
 import java.net.{ConnectException, HttpURLConnection, SocketException, URL}
+import java.util.concurrent.TimeoutException
 import javax.servlet.http.HttpServletResponse
 
 import scala.collection.mutable
+import scala.concurrent.duration._
+import scala.concurrent.{Await, Future}
 import scala.io.Source
 
 import com.fasterxml.jackson.core.JsonProcessingException
 import com.google.common.base.Charsets
 
-import org.apache.spark.{Logging, SparkConf, SPARK_VERSION => sparkVersion}
 import org.apache.spark.util.Utils
+import org.apache.spark.{Logging, SPARK_VERSION => sparkVersion, SparkConf}
 
 /**
  * A client that submits applications to a [[RestSubmissionServer]].
@@ -225,7 +228,8 @@ private[spark] class RestSubmissionClient(master: String) extends Logging {
    * Exposed for testing.
    */
   private[rest] def readResponse(connection: HttpURLConnection): SubmitRestProtocolResponse = {
-    try {
+    import scala.concurrent.ExecutionContext.Implicits.global
+    val responseFuture = Future {
       val dataStream =
         if (connection.getResponseCode == HttpServletResponse.SC_OK) {
           connection.getInputStream
@@ -251,11 +255,15 @@ private[spark] class RestSubmissionClient(master: String) extends Logging {
           throw new SubmitRestProtocolException(
             s"Message received from server was not a response:\n${unexpected.toJson}")
       }
-    } catch {
+    }
+
+    try { Await.result(responseFuture, 10.seconds) } catch {
       case unreachable @ (_: FileNotFoundException | _: SocketException) =>
         throw new SubmitRestConnectionException("Unable to connect to server", unreachable)
       case malformed @ (_: JsonProcessingException | _: SubmitRestProtocolException) =>
         throw new SubmitRestProtocolException("Malformed response received from server", malformed)
+      case timeout: TimeoutException =>
+        throw new SubmitRestConnectionException("No response from server", timeout)
     }
   }
 

From 75a292291062783129d02607302f91c85655975e Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Tue, 17 Nov 2015 16:57:52 -0800
Subject: [PATCH 742/896] [SPARK-9065][STREAMING][PYSPARK] Add MessageHandler
 for Kafka Python API

Fixed the merge conflicts in #7410

Closes #7410

Author: Shixiong Zhu <shixiong@databricks.com>
Author: jerryshao <saisai.shao@intel.com>
Author: jerryshao <sshao@hortonworks.com>

Closes #9742 from zsxwing/pr7410.
---
 .../spark/streaming/kafka/KafkaUtils.scala    | 245 ++++++++++++------
 project/MimaExcludes.scala                    |   6 +
 python/pyspark/streaming/kafka.py             | 111 +++++++-
 python/pyspark/streaming/tests.py             |  35 +++
 4 files changed, 299 insertions(+), 98 deletions(-)

diff --git a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala
index 312822207753..ad2fb8aa5f24 100644
--- a/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala
+++ b/external/kafka/src/main/scala/org/apache/spark/streaming/kafka/KafkaUtils.scala
@@ -17,25 +17,29 @@
 
 package org.apache.spark.streaming.kafka
 
+import java.io.OutputStream
 import java.lang.{Integer => JInt, Long => JLong}
 import java.util.{List => JList, Map => JMap, Set => JSet}
 
 import scala.collection.JavaConverters._
 import scala.reflect.ClassTag
 
+import com.google.common.base.Charsets.UTF_8
 import kafka.common.TopicAndPartition
 import kafka.message.MessageAndMetadata
-import kafka.serializer.{Decoder, DefaultDecoder, StringDecoder}
+import kafka.serializer.{DefaultDecoder, Decoder, StringDecoder}
+import net.razorvine.pickle.{Opcodes, Pickler, IObjectPickler}
 
 import org.apache.spark.api.java.function.{Function => JFunction}
-import org.apache.spark.api.java.{JavaPairRDD, JavaRDD, JavaSparkContext}
+import org.apache.spark.streaming.util.WriteAheadLogUtils
+import org.apache.spark.{SparkContext, SparkException}
+import org.apache.spark.api.java.{JavaSparkContext, JavaPairRDD, JavaRDD}
+import org.apache.spark.api.python.SerDeUtil
 import org.apache.spark.rdd.RDD
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.streaming.StreamingContext
-import org.apache.spark.streaming.api.java.{JavaInputDStream, JavaPairInputDStream, JavaPairReceiverInputDStream, JavaStreamingContext}
-import org.apache.spark.streaming.dstream.{InputDStream, ReceiverInputDStream}
-import org.apache.spark.streaming.util.WriteAheadLogUtils
-import org.apache.spark.{SparkContext, SparkException}
+import org.apache.spark.streaming.api.java._
+import org.apache.spark.streaming.dstream.{DStream, InputDStream, ReceiverInputDStream}
 
 object KafkaUtils {
   /**
@@ -184,6 +188,27 @@ object KafkaUtils {
     }
   }
 
+  private[kafka] def getFromOffsets(
+      kc: KafkaCluster,
+      kafkaParams: Map[String, String],
+      topics: Set[String]
+    ): Map[TopicAndPartition, Long] = {
+    val reset = kafkaParams.get("auto.offset.reset").map(_.toLowerCase)
+    val result = for {
+      topicPartitions <- kc.getPartitions(topics).right
+      leaderOffsets <- (if (reset == Some("smallest")) {
+        kc.getEarliestLeaderOffsets(topicPartitions)
+      } else {
+        kc.getLatestLeaderOffsets(topicPartitions)
+      }).right
+    } yield {
+      leaderOffsets.map { case (tp, lo) =>
+          (tp, lo.offset)
+      }
+    }
+    KafkaCluster.checkErrors(result)
+  }
+
   /**
    * Create a RDD from Kafka using offset ranges for each topic and partition.
    *
@@ -246,7 +271,7 @@ object KafkaUtils {
       // This could be avoided by refactoring KafkaRDD.leaders and KafkaCluster to use Broker
       leaders.map {
         case (tp: TopicAndPartition, Broker(host, port)) => (tp, (host, port))
-      }.toMap
+      }
     }
     val cleanedHandler = sc.clean(messageHandler)
     checkOffsets(kc, offsetRanges)
@@ -406,23 +431,9 @@ object KafkaUtils {
   ): InputDStream[(K, V)] = {
     val messageHandler = (mmd: MessageAndMetadata[K, V]) => (mmd.key, mmd.message)
     val kc = new KafkaCluster(kafkaParams)
-    val reset = kafkaParams.get("auto.offset.reset").map(_.toLowerCase)
-
-    val result = for {
-      topicPartitions <- kc.getPartitions(topics).right
-      leaderOffsets <- (if (reset == Some("smallest")) {
-        kc.getEarliestLeaderOffsets(topicPartitions)
-      } else {
-        kc.getLatestLeaderOffsets(topicPartitions)
-      }).right
-    } yield {
-      val fromOffsets = leaderOffsets.map { case (tp, lo) =>
-          (tp, lo.offset)
-      }
-      new DirectKafkaInputDStream[K, V, KD, VD, (K, V)](
-        ssc, kafkaParams, fromOffsets, messageHandler)
-    }
-    KafkaCluster.checkErrors(result)
+    val fromOffsets = getFromOffsets(kc, kafkaParams, topics)
+    new DirectKafkaInputDStream[K, V, KD, VD, (K, V)](
+      ssc, kafkaParams, fromOffsets, messageHandler)
   }
 
   /**
@@ -550,6 +561,8 @@ object KafkaUtils {
  * takes care of known parameters instead of passing them from Python
  */
 private[kafka] class KafkaUtilsPythonHelper {
+  import KafkaUtilsPythonHelper._
+
   def createStream(
       jssc: JavaStreamingContext,
       kafkaParams: JMap[String, String],
@@ -566,86 +579,92 @@ private[kafka] class KafkaUtilsPythonHelper {
       storageLevel)
   }
 
-  def createRDD(
+  def createRDDWithoutMessageHandler(
       jsc: JavaSparkContext,
       kafkaParams: JMap[String, String],
       offsetRanges: JList[OffsetRange],
-      leaders: JMap[TopicAndPartition, Broker]): JavaPairRDD[Array[Byte], Array[Byte]] = {
-    val messageHandler = new JFunction[MessageAndMetadata[Array[Byte], Array[Byte]],
-      (Array[Byte], Array[Byte])] {
-      def call(t1: MessageAndMetadata[Array[Byte], Array[Byte]]): (Array[Byte], Array[Byte]) =
-        (t1.key(), t1.message())
-    }
+      leaders: JMap[TopicAndPartition, Broker]): JavaRDD[(Array[Byte], Array[Byte])] = {
+    val messageHandler =
+      (mmd: MessageAndMetadata[Array[Byte], Array[Byte]]) => (mmd.key, mmd.message)
+    new JavaRDD(createRDD(jsc, kafkaParams, offsetRanges, leaders, messageHandler))
+  }
 
-    val jrdd = KafkaUtils.createRDD[
-      Array[Byte],
-      Array[Byte],
-      DefaultDecoder,
-      DefaultDecoder,
-      (Array[Byte], Array[Byte])](
-        jsc,
-        classOf[Array[Byte]],
-        classOf[Array[Byte]],
-        classOf[DefaultDecoder],
-        classOf[DefaultDecoder],
-        classOf[(Array[Byte], Array[Byte])],
-        kafkaParams,
-        offsetRanges.toArray(new Array[OffsetRange](offsetRanges.size())),
-        leaders,
-        messageHandler
-      )
-    new JavaPairRDD(jrdd.rdd)
+  def createRDDWithMessageHandler(
+      jsc: JavaSparkContext,
+      kafkaParams: JMap[String, String],
+      offsetRanges: JList[OffsetRange],
+      leaders: JMap[TopicAndPartition, Broker]): JavaRDD[Array[Byte]] = {
+    val messageHandler = (mmd: MessageAndMetadata[Array[Byte], Array[Byte]]) =>
+      new PythonMessageAndMetadata(
+        mmd.topic, mmd.partition, mmd.offset, mmd.key(), mmd.message())
+    val rdd = createRDD(jsc, kafkaParams, offsetRanges, leaders, messageHandler).
+        mapPartitions(picklerIterator)
+    new JavaRDD(rdd)
   }
 
-  def createDirectStream(
+  private def createRDD[V: ClassTag](
+      jsc: JavaSparkContext,
+      kafkaParams: JMap[String, String],
+      offsetRanges: JList[OffsetRange],
+      leaders: JMap[TopicAndPartition, Broker],
+      messageHandler: MessageAndMetadata[Array[Byte], Array[Byte]] => V): RDD[V] = {
+    KafkaUtils.createRDD[Array[Byte], Array[Byte], DefaultDecoder, DefaultDecoder, V](
+      jsc.sc,
+      kafkaParams.asScala.toMap,
+      offsetRanges.toArray(new Array[OffsetRange](offsetRanges.size())),
+      leaders.asScala.toMap,
+      messageHandler
+    )
+  }
+
+  def createDirectStreamWithoutMessageHandler(
+      jssc: JavaStreamingContext,
+      kafkaParams: JMap[String, String],
+      topics: JSet[String],
+      fromOffsets: JMap[TopicAndPartition, JLong]): JavaDStream[(Array[Byte], Array[Byte])] = {
+    val messageHandler =
+      (mmd: MessageAndMetadata[Array[Byte], Array[Byte]]) => (mmd.key, mmd.message)
+    new JavaDStream(createDirectStream(jssc, kafkaParams, topics, fromOffsets, messageHandler))
+  }
+
+  def createDirectStreamWithMessageHandler(
       jssc: JavaStreamingContext,
       kafkaParams: JMap[String, String],
       topics: JSet[String],
-      fromOffsets: JMap[TopicAndPartition, JLong]
-    ): JavaPairInputDStream[Array[Byte], Array[Byte]] = {
+      fromOffsets: JMap[TopicAndPartition, JLong]): JavaDStream[Array[Byte]] = {
+    val messageHandler = (mmd: MessageAndMetadata[Array[Byte], Array[Byte]]) =>
+      new PythonMessageAndMetadata(mmd.topic, mmd.partition, mmd.offset, mmd.key(), mmd.message())
+    val stream = createDirectStream(jssc, kafkaParams, topics, fromOffsets, messageHandler).
+      mapPartitions(picklerIterator)
+    new JavaDStream(stream)
+  }
 
-    if (!fromOffsets.isEmpty) {
+  private def createDirectStream[V: ClassTag](
+      jssc: JavaStreamingContext,
+      kafkaParams: JMap[String, String],
+      topics: JSet[String],
+      fromOffsets: JMap[TopicAndPartition, JLong],
+      messageHandler: MessageAndMetadata[Array[Byte], Array[Byte]] => V): DStream[V] = {
+
+    val currentFromOffsets = if (!fromOffsets.isEmpty) {
       val topicsFromOffsets = fromOffsets.keySet().asScala.map(_.topic)
       if (topicsFromOffsets != topics.asScala.toSet) {
         throw new IllegalStateException(
           s"The specified topics: ${topics.asScala.toSet.mkString(" ")} " +
           s"do not equal to the topic from offsets: ${topicsFromOffsets.mkString(" ")}")
       }
-    }
-
-    if (fromOffsets.isEmpty) {
-      KafkaUtils.createDirectStream[Array[Byte], Array[Byte], DefaultDecoder, DefaultDecoder](
-        jssc,
-        classOf[Array[Byte]],
-        classOf[Array[Byte]],
-        classOf[DefaultDecoder],
-        classOf[DefaultDecoder],
-        kafkaParams,
-        topics)
+      Map(fromOffsets.asScala.mapValues { _.longValue() }.toSeq: _*)
     } else {
-      val messageHandler = new JFunction[MessageAndMetadata[Array[Byte], Array[Byte]],
-        (Array[Byte], Array[Byte])] {
-        def call(t1: MessageAndMetadata[Array[Byte], Array[Byte]]): (Array[Byte], Array[Byte]) =
-          (t1.key(), t1.message())
-      }
-
-      val jstream = KafkaUtils.createDirectStream[
-        Array[Byte],
-        Array[Byte],
-        DefaultDecoder,
-        DefaultDecoder,
-        (Array[Byte], Array[Byte])](
-          jssc,
-          classOf[Array[Byte]],
-          classOf[Array[Byte]],
-          classOf[DefaultDecoder],
-          classOf[DefaultDecoder],
-          classOf[(Array[Byte], Array[Byte])],
-          kafkaParams,
-          fromOffsets,
-          messageHandler)
-      new JavaPairInputDStream(jstream.inputDStream)
+      val kc = new KafkaCluster(Map(kafkaParams.asScala.toSeq: _*))
+      KafkaUtils.getFromOffsets(
+        kc, Map(kafkaParams.asScala.toSeq: _*), Set(topics.asScala.toSeq: _*))
     }
+
+    KafkaUtils.createDirectStream[Array[Byte], Array[Byte], DefaultDecoder, DefaultDecoder, V](
+      jssc.ssc,
+      Map(kafkaParams.asScala.toSeq: _*),
+      Map(currentFromOffsets.toSeq: _*),
+      messageHandler)
   }
 
   def createOffsetRange(topic: String, partition: JInt, fromOffset: JLong, untilOffset: JLong
@@ -669,3 +688,57 @@ private[kafka] class KafkaUtilsPythonHelper {
     kafkaRDD.offsetRanges.toSeq.asJava
   }
 }
+
+private object KafkaUtilsPythonHelper {
+  private var initialized = false
+
+  def initialize(): Unit = {
+    SerDeUtil.initialize()
+    synchronized {
+      if (!initialized) {
+        new PythonMessageAndMetadataPickler().register()
+        initialized = true
+      }
+    }
+  }
+
+  initialize()
+
+  def picklerIterator(iter: Iterator[Any]): Iterator[Array[Byte]] = {
+    new SerDeUtil.AutoBatchedPickler(iter)
+  }
+
+  case class PythonMessageAndMetadata(
+      topic: String,
+      partition: JInt,
+      offset: JLong,
+      key: Array[Byte],
+      message: Array[Byte])
+
+  class PythonMessageAndMetadataPickler extends IObjectPickler {
+    private val module = "pyspark.streaming.kafka"
+
+    def register(): Unit = {
+      Pickler.registerCustomPickler(classOf[PythonMessageAndMetadata], this)
+      Pickler.registerCustomPickler(this.getClass, this)
+    }
+
+    def pickle(obj: Object, out: OutputStream, pickler: Pickler) {
+      if (obj == this) {
+        out.write(Opcodes.GLOBAL)
+        out.write(s"$module\nKafkaMessageAndMetadata\n".getBytes(UTF_8))
+      } else {
+        pickler.save(this)
+        val msgAndMetaData = obj.asInstanceOf[PythonMessageAndMetadata]
+        out.write(Opcodes.MARK)
+        pickler.save(msgAndMetaData.topic)
+        pickler.save(msgAndMetaData.partition)
+        pickler.save(msgAndMetaData.offset)
+        pickler.save(msgAndMetaData.key)
+        pickler.save(msgAndMetaData.message)
+        out.write(Opcodes.TUPLE)
+        out.write(Opcodes.REDUCE)
+      }
+    }
+  }
+}
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index 8b3bc96801e2..eb70d27c34c2 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -136,6 +136,12 @@ object MimaExcludes {
         // SPARK-11766 add toJson to Vector
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.mllib.linalg.Vector.toJson")
+      ) ++ Seq(
+        // SPARK-9065 Support message handler in Kafka Python API
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper.createDirectStream"),
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper.createRDD")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/python/pyspark/streaming/kafka.py b/python/pyspark/streaming/kafka.py
index 06e159172ab5..cdf97ec73aaf 100644
--- a/python/pyspark/streaming/kafka.py
+++ b/python/pyspark/streaming/kafka.py
@@ -19,12 +19,14 @@
 
 from pyspark.rdd import RDD
 from pyspark.storagelevel import StorageLevel
-from pyspark.serializers import PairDeserializer, NoOpSerializer
+from pyspark.serializers import AutoBatchedSerializer, PickleSerializer, PairDeserializer, \
+    NoOpSerializer
 from pyspark.streaming import DStream
 from pyspark.streaming.dstream import TransformedDStream
 from pyspark.streaming.util import TransformFunction
 
-__all__ = ['Broker', 'KafkaUtils', 'OffsetRange', 'TopicAndPartition', 'utf8_decoder']
+__all__ = ['Broker', 'KafkaMessageAndMetadata', 'KafkaUtils', 'OffsetRange',
+           'TopicAndPartition', 'utf8_decoder']
 
 
 def utf8_decoder(s):
@@ -82,7 +84,8 @@ def createStream(ssc, zkQuorum, groupId, topics, kafkaParams=None,
 
     @staticmethod
     def createDirectStream(ssc, topics, kafkaParams, fromOffsets=None,
-                           keyDecoder=utf8_decoder, valueDecoder=utf8_decoder):
+                           keyDecoder=utf8_decoder, valueDecoder=utf8_decoder,
+                           messageHandler=None):
         """
         .. note:: Experimental
 
@@ -107,6 +110,8 @@ def createDirectStream(ssc, topics, kafkaParams, fromOffsets=None,
                             point of the stream.
         :param keyDecoder:  A function used to decode key (default is utf8_decoder).
         :param valueDecoder:  A function used to decode value (default is utf8_decoder).
+        :param messageHandler: A function used to convert KafkaMessageAndMetadata. You can assess
+                               meta using messageHandler (default is None).
         :return: A DStream object
         """
         if fromOffsets is None:
@@ -116,6 +121,14 @@ def createDirectStream(ssc, topics, kafkaParams, fromOffsets=None,
         if not isinstance(kafkaParams, dict):
             raise TypeError("kafkaParams should be dict")
 
+        def funcWithoutMessageHandler(k_v):
+            return (keyDecoder(k_v[0]), valueDecoder(k_v[1]))
+
+        def funcWithMessageHandler(m):
+            m._set_key_decoder(keyDecoder)
+            m._set_value_decoder(valueDecoder)
+            return messageHandler(m)
+
         try:
             helperClass = ssc._jvm.java.lang.Thread.currentThread().getContextClassLoader() \
                 .loadClass("org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper")
@@ -123,20 +136,28 @@ def createDirectStream(ssc, topics, kafkaParams, fromOffsets=None,
 
             jfromOffsets = dict([(k._jTopicAndPartition(helper),
                                   v) for (k, v) in fromOffsets.items()])
-            jstream = helper.createDirectStream(ssc._jssc, kafkaParams, set(topics), jfromOffsets)
+            if messageHandler is None:
+                ser = PairDeserializer(NoOpSerializer(), NoOpSerializer())
+                func = funcWithoutMessageHandler
+                jstream = helper.createDirectStreamWithoutMessageHandler(
+                    ssc._jssc, kafkaParams, set(topics), jfromOffsets)
+            else:
+                ser = AutoBatchedSerializer(PickleSerializer())
+                func = funcWithMessageHandler
+                jstream = helper.createDirectStreamWithMessageHandler(
+                    ssc._jssc, kafkaParams, set(topics), jfromOffsets)
         except Py4JJavaError as e:
             if 'ClassNotFoundException' in str(e.java_exception):
                 KafkaUtils._printErrorMsg(ssc.sparkContext)
             raise e
 
-        ser = PairDeserializer(NoOpSerializer(), NoOpSerializer())
-        stream = DStream(jstream, ssc, ser) \
-            .map(lambda k_v: (keyDecoder(k_v[0]), valueDecoder(k_v[1])))
+        stream = DStream(jstream, ssc, ser).map(func)
         return KafkaDStream(stream._jdstream, ssc, stream._jrdd_deserializer)
 
     @staticmethod
     def createRDD(sc, kafkaParams, offsetRanges, leaders=None,
-                  keyDecoder=utf8_decoder, valueDecoder=utf8_decoder):
+                  keyDecoder=utf8_decoder, valueDecoder=utf8_decoder,
+                  messageHandler=None):
         """
         .. note:: Experimental
 
@@ -149,6 +170,8 @@ def createRDD(sc, kafkaParams, offsetRanges, leaders=None,
             map, in which case leaders will be looked up on the driver.
         :param keyDecoder:  A function used to decode key (default is utf8_decoder)
         :param valueDecoder:  A function used to decode value (default is utf8_decoder)
+        :param messageHandler: A function used to convert KafkaMessageAndMetadata. You can assess
+                               meta using messageHandler (default is None).
         :return: A RDD object
         """
         if leaders is None:
@@ -158,6 +181,14 @@ def createRDD(sc, kafkaParams, offsetRanges, leaders=None,
         if not isinstance(offsetRanges, list):
             raise TypeError("offsetRanges should be list")
 
+        def funcWithoutMessageHandler(k_v):
+            return (keyDecoder(k_v[0]), valueDecoder(k_v[1]))
+
+        def funcWithMessageHandler(m):
+            m._set_key_decoder(keyDecoder)
+            m._set_value_decoder(valueDecoder)
+            return messageHandler(m)
+
         try:
             helperClass = sc._jvm.java.lang.Thread.currentThread().getContextClassLoader() \
                 .loadClass("org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper")
@@ -165,15 +196,21 @@ def createRDD(sc, kafkaParams, offsetRanges, leaders=None,
             joffsetRanges = [o._jOffsetRange(helper) for o in offsetRanges]
             jleaders = dict([(k._jTopicAndPartition(helper),
                               v._jBroker(helper)) for (k, v) in leaders.items()])
-            jrdd = helper.createRDD(sc._jsc, kafkaParams, joffsetRanges, jleaders)
+            if messageHandler is None:
+                jrdd = helper.createRDDWithoutMessageHandler(
+                    sc._jsc, kafkaParams, joffsetRanges, jleaders)
+                ser = PairDeserializer(NoOpSerializer(), NoOpSerializer())
+                rdd = RDD(jrdd, sc, ser).map(funcWithoutMessageHandler)
+            else:
+                jrdd = helper.createRDDWithMessageHandler(
+                    sc._jsc, kafkaParams, joffsetRanges, jleaders)
+                rdd = RDD(jrdd, sc).map(funcWithMessageHandler)
         except Py4JJavaError as e:
             if 'ClassNotFoundException' in str(e.java_exception):
                 KafkaUtils._printErrorMsg(sc)
             raise e
 
-        ser = PairDeserializer(NoOpSerializer(), NoOpSerializer())
-        rdd = RDD(jrdd, sc, ser).map(lambda k_v: (keyDecoder(k_v[0]), valueDecoder(k_v[1])))
-        return KafkaRDD(rdd._jrdd, rdd.ctx, rdd._jrdd_deserializer)
+        return KafkaRDD(rdd._jrdd, sc, rdd._jrdd_deserializer)
 
     @staticmethod
     def _printErrorMsg(sc):
@@ -365,3 +402,53 @@ def _jdstream(self):
         dstream = self._sc._jvm.PythonTransformedDStream(self.prev._jdstream.dstream(), jfunc)
         self._jdstream_val = dstream.asJavaDStream()
         return self._jdstream_val
+
+
+class KafkaMessageAndMetadata(object):
+    """
+    Kafka message and metadata information. Including topic, partition, offset and message
+    """
+
+    def __init__(self, topic, partition, offset, key, message):
+        """
+        Python wrapper of Kafka MessageAndMetadata
+        :param topic: topic name of this Kafka message
+        :param partition: partition id of this Kafka message
+        :param offset: Offset of this Kafka message in the specific partition
+        :param key: key payload of this Kafka message, can be null if this Kafka message has no key
+                    specified, the return data is undecoded bytearry.
+        :param message: actual message payload of this Kafka message, the return data is
+                        undecoded bytearray.
+        """
+        self.topic = topic
+        self.partition = partition
+        self.offset = offset
+        self._rawKey = key
+        self._rawMessage = message
+        self._keyDecoder = utf8_decoder
+        self._valueDecoder = utf8_decoder
+
+    def __str__(self):
+        return "KafkaMessageAndMetadata(topic: %s, partition: %d, offset: %d, key and message...)" \
+               % (self.topic, self.partition, self.offset)
+
+    def __repr__(self):
+        return self.__str__()
+
+    def __reduce__(self):
+        return (KafkaMessageAndMetadata,
+                (self.topic, self.partition, self.offset, self._rawKey, self._rawMessage))
+
+    def _set_key_decoder(self, decoder):
+        self._keyDecoder = decoder
+
+    def _set_value_decoder(self, decoder):
+        self._valueDecoder = decoder
+
+    @property
+    def key(self):
+        return self._keyDecoder(self._rawKey)
+
+    @property
+    def message(self):
+        return self._valueDecoder(self._rawMessage)
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index ff95639146e5..0bcd1f15532b 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -1042,6 +1042,41 @@ def test_topic_and_partition_equality(self):
         self.assertNotEqual(topic_and_partition_a, topic_and_partition_c)
         self.assertNotEqual(topic_and_partition_a, topic_and_partition_d)
 
+    @unittest.skipIf(sys.version >= "3", "long type not support")
+    def test_kafka_rdd_message_handler(self):
+        """Test Python direct Kafka RDD MessageHandler."""
+        topic = self._randomTopic()
+        sendData = {"a": 1, "b": 1, "c": 2}
+        offsetRanges = [OffsetRange(topic, 0, long(0), long(sum(sendData.values())))]
+        kafkaParams = {"metadata.broker.list": self._kafkaTestUtils.brokerAddress()}
+
+        def getKeyAndDoubleMessage(m):
+            return m and (m.key, m.message * 2)
+
+        self._kafkaTestUtils.createTopic(topic)
+        self._kafkaTestUtils.sendMessages(topic, sendData)
+        rdd = KafkaUtils.createRDD(self.sc, kafkaParams, offsetRanges,
+                                   messageHandler=getKeyAndDoubleMessage)
+        self._validateRddResult({"aa": 1, "bb": 1, "cc": 2}, rdd)
+
+    @unittest.skipIf(sys.version >= "3", "long type not support")
+    def test_kafka_direct_stream_message_handler(self):
+        """Test the Python direct Kafka stream MessageHandler."""
+        topic = self._randomTopic()
+        sendData = {"a": 1, "b": 2, "c": 3}
+        kafkaParams = {"metadata.broker.list": self._kafkaTestUtils.brokerAddress(),
+                       "auto.offset.reset": "smallest"}
+
+        self._kafkaTestUtils.createTopic(topic)
+        self._kafkaTestUtils.sendMessages(topic, sendData)
+
+        def getKeyAndDoubleMessage(m):
+            return m and (m.key, m.message * 2)
+
+        stream = KafkaUtils.createDirectStream(self.ssc, [topic], kafkaParams,
+                                               messageHandler=getKeyAndDoubleMessage)
+        self._validateStreamResult({"aa": 1, "bb": 2, "cc": 3}, stream)
+
 
 class FlumeStreamTests(PySparkStreamingTestCase):
     timeout = 20  # seconds

From ed8d1531f93f697c54bbaecefe08c37c32b0d391 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 17 Nov 2015 19:02:44 -0800
Subject: [PATCH 743/896] [SPARK-11793][SQL] Dataset should set the resolved
 encoders internally for maps.

I also wrote a test case -- but unfortunately the test case is not working due to SPARK-11795.

Author: Reynold Xin <rxin@databricks.com>

Closes #9784 from rxin/SPARK-11503.
---
 .../src/main/scala/org/apache/spark/sql/Dataset.scala |  3 ++-
 .../scala/org/apache/spark/sql/DatasetSuite.scala     | 11 +++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 4cc3aa2465f2..bd01dd4dc579 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -199,11 +199,12 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def mapPartitions[U : Encoder](func: Iterator[T] => Iterator[U]): Dataset[U] = {
+    encoderFor[T].assertUnresolved()
     new Dataset[U](
       sqlContext,
       MapPartitions[T, U](
         func,
-        encoderFor[T],
+        resolvedTEncoder,
         encoderFor[U],
         encoderFor[U].schema.toAttributes,
         logicalPlan))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index c23dd46d3767..a3922340ccc9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -73,6 +73,17 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       ("a", 2), ("b", 3), ("c", 4))
   }
 
+  ignore("Dataset should set the resolved encoders internally for maps") {
+    // TODO: Enable this once we fix SPARK-11793.
+    val ds: Dataset[(ClassData, Long)] = Seq(ClassData("one", 1), ClassData("two", 2)).toDS()
+        .map(c => ClassData(c.a, c.b + 1))
+        .groupBy(p => p).count()
+
+    checkAnswer(
+      ds,
+      (ClassData("one", 1), 1L), (ClassData("two", 2), 1L))
+  }
+
   test("select") {
     val ds = Seq(("a", 1) , ("b", 2), ("c", 3)).toDS()
     checkAnswer(

From bf25f9bdfc7bd8533890c7df1b35afa912dc6d3d Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 17 Nov 2015 19:39:39 -0800
Subject: [PATCH 744/896] [SPARK-11016] Move RoaringBitmap to explicit Kryo
 serializer

Fix the serialization of RoaringBitmap with Kyro serializer

This PR came from https://github.com/metamx/spark/pull/1, thanks to drcrallen

Author: Davies Liu <davies@databricks.com>
Author: Charles Allen <charles@allen-net.com>

Closes #9748 from davies/SPARK-11016.
---
 .../spark/serializer/KryoSerializer.scala     | 64 ++++++++++++++++---
 1 file changed, 55 insertions(+), 9 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
index c5195c1143a8..1bcb3175a301 100644
--- a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
+++ b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.serializer
 
-import java.io.{EOFException, IOException, InputStream, OutputStream}
+import java.io.{EOFException, IOException, InputStream, OutputStream, DataInput, DataOutput}
 import java.nio.ByteBuffer
 import javax.annotation.Nullable
 
@@ -25,12 +25,12 @@ import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
 import scala.reflect.ClassTag
 
-import com.esotericsoftware.kryo.{Kryo, KryoException}
+import com.esotericsoftware.kryo.{Kryo, KryoException, Serializer => KryoClassSerializer}
 import com.esotericsoftware.kryo.io.{Input => KryoInput, Output => KryoOutput}
 import com.esotericsoftware.kryo.serializers.{JavaSerializer => KryoJavaSerializer}
 import com.twitter.chill.{AllScalaRegistrar, EmptyScalaKryoInstantiator}
 import org.apache.avro.generic.{GenericData, GenericRecord}
-import org.roaringbitmap.{ArrayContainer, BitmapContainer, RoaringArray, RoaringBitmap}
+import org.roaringbitmap.RoaringBitmap
 
 import org.apache.spark._
 import org.apache.spark.api.python.PythonBroadcast
@@ -94,6 +94,9 @@ class KryoSerializer(conf: SparkConf)
     for (cls <- KryoSerializer.toRegister) {
       kryo.register(cls)
     }
+    for ((cls, ser) <- KryoSerializer.toRegisterSerializer) {
+      kryo.register(cls, ser)
+    }
 
     // For results returned by asJavaIterable. See JavaIterableWrapperSerializer.
     kryo.register(JavaIterableWrapperSerializer.wrapperClass, new JavaIterableWrapperSerializer)
@@ -363,12 +366,6 @@ private[serializer] object KryoSerializer {
     classOf[StorageLevel],
     classOf[CompressedMapStatus],
     classOf[HighlyCompressedMapStatus],
-    classOf[RoaringBitmap],
-    classOf[RoaringArray],
-    classOf[RoaringArray.Element],
-    classOf[Array[RoaringArray.Element]],
-    classOf[ArrayContainer],
-    classOf[BitmapContainer],
     classOf[CompactBuffer[_]],
     classOf[BlockManagerId],
     classOf[Array[Byte]],
@@ -377,6 +374,55 @@ private[serializer] object KryoSerializer {
     classOf[BoundedPriorityQueue[_]],
     classOf[SparkConf]
   )
+
+  private val toRegisterSerializer = Map[Class[_], KryoClassSerializer[_]](
+    classOf[RoaringBitmap] -> new KryoClassSerializer[RoaringBitmap]() {
+      override def write(kryo: Kryo, output: KryoOutput, bitmap: RoaringBitmap): Unit = {
+        bitmap.serialize(new KryoOutputDataOutputBridge(output))
+      }
+      override def read(kryo: Kryo, input: KryoInput, cls: Class[RoaringBitmap]): RoaringBitmap = {
+        val ret = new RoaringBitmap
+        ret.deserialize(new KryoInputDataInputBridge(input))
+        ret
+      }
+    }
+  )
+}
+
+private[serializer] class KryoInputDataInputBridge(input: KryoInput) extends DataInput {
+  override def readLong(): Long = input.readLong()
+  override def readChar(): Char = input.readChar()
+  override def readFloat(): Float = input.readFloat()
+  override def readByte(): Byte = input.readByte()
+  override def readShort(): Short = input.readShort()
+  override def readUTF(): String = input.readString() // readString in kryo does utf8
+  override def readInt(): Int = input.readInt()
+  override def readUnsignedShort(): Int = input.readShortUnsigned()
+  override def skipBytes(n: Int): Int = input.skip(n.toLong).toInt
+  override def readFully(b: Array[Byte]): Unit = input.read(b)
+  override def readFully(b: Array[Byte], off: Int, len: Int): Unit = input.read(b, off, len)
+  override def readLine(): String = throw new UnsupportedOperationException("readLine")
+  override def readBoolean(): Boolean = input.readBoolean()
+  override def readUnsignedByte(): Int = input.readByteUnsigned()
+  override def readDouble(): Double = input.readDouble()
+}
+
+private[serializer] class KryoOutputDataOutputBridge(output: KryoOutput) extends DataOutput {
+  override def writeFloat(v: Float): Unit = output.writeFloat(v)
+  // There is no "readChars" counterpart, except maybe "readLine", which is not supported
+  override def writeChars(s: String): Unit = throw new UnsupportedOperationException("writeChars")
+  override def writeDouble(v: Double): Unit = output.writeDouble(v)
+  override def writeUTF(s: String): Unit = output.writeString(s) // writeString in kryo does UTF8
+  override def writeShort(v: Int): Unit = output.writeShort(v)
+  override def writeInt(v: Int): Unit = output.writeInt(v)
+  override def writeBoolean(v: Boolean): Unit = output.writeBoolean(v)
+  override def write(b: Int): Unit = output.write(b)
+  override def write(b: Array[Byte]): Unit = output.write(b)
+  override def write(b: Array[Byte], off: Int, len: Int): Unit = output.write(b, off, len)
+  override def writeBytes(s: String): Unit = output.writeString(s)
+  override def writeChar(v: Int): Unit = output.writeChar(v.toChar)
+  override def writeLong(v: Long): Unit = output.writeLong(v)
+  override def writeByte(v: Int): Unit = output.writeByte(v)
 }
 
 /**

From e33053ee0015025bbcfddb20cc9216c225bbe624 Mon Sep 17 00:00:00 2001
From: Kent Yao <yaooqinn@hotmail.com>
Date: Tue, 17 Nov 2015 19:44:29 -0800
Subject: [PATCH 745/896] [SPARK-11583] [CORE] MapStatus Using RoaringBitmap
 More Properly

This PR upgrade the version of RoaringBitmap to 0.5.10, to optimize the memory layout, will be much smaller when most of blocks are empty.

This PR is based on #9661 (fix conflicts), see all of the comments at https://github.com/apache/spark/pull/9661 .

Author: Kent Yao <yaooqinn@hotmail.com>
Author: Davies Liu <davies@databricks.com>
Author: Charles Allen <charles@allen-net.com>

Closes #9746 from davies/roaring_mapstatus.
---
 .../apache/spark/scheduler/MapStatus.scala    |  5 +--
 .../spark/serializer/KryoSerializer.scala     |  6 ++--
 .../spark/scheduler/MapStatusSuite.scala      | 31 +++++++++++++++++++
 pom.xml                                       |  2 +-
 4 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
index 1efce124c0a6..b2e9a97129f0 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/MapStatus.scala
@@ -122,8 +122,7 @@ private[spark] class CompressedMapStatus(
 
 /**
  * A [[MapStatus]] implementation that only stores the average size of non-empty blocks,
- * plus a bitmap for tracking which blocks are empty.  During serialization, this bitmap
- * is compressed.
+ * plus a bitmap for tracking which blocks are empty.
  *
  * @param loc location where the task is being executed
  * @param numNonEmptyBlocks the number of non-empty blocks
@@ -194,6 +193,8 @@ private[spark] object HighlyCompressedMapStatus {
     } else {
       0
     }
+    emptyBlocks.trim()
+    emptyBlocks.runOptimize()
     new HighlyCompressedMapStatus(loc, numNonEmptyBlocks, emptyBlocks, avgSize)
   }
 }
diff --git a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
index 1bcb3175a301..d5ba690ed04b 100644
--- a/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
+++ b/core/src/main/scala/org/apache/spark/serializer/KryoSerializer.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.serializer
 
-import java.io.{EOFException, IOException, InputStream, OutputStream, DataInput, DataOutput}
+import java.io.{DataInput, DataOutput, EOFException, IOException, InputStream, OutputStream}
 import java.nio.ByteBuffer
 import javax.annotation.Nullable
 
@@ -25,9 +25,9 @@ import scala.collection.JavaConverters._
 import scala.collection.mutable.ArrayBuffer
 import scala.reflect.ClassTag
 
-import com.esotericsoftware.kryo.{Kryo, KryoException, Serializer => KryoClassSerializer}
 import com.esotericsoftware.kryo.io.{Input => KryoInput, Output => KryoOutput}
 import com.esotericsoftware.kryo.serializers.{JavaSerializer => KryoJavaSerializer}
+import com.esotericsoftware.kryo.{Kryo, KryoException, Serializer => KryoClassSerializer}
 import com.twitter.chill.{AllScalaRegistrar, EmptyScalaKryoInstantiator}
 import org.apache.avro.generic.{GenericData, GenericRecord}
 import org.roaringbitmap.RoaringBitmap
@@ -38,8 +38,8 @@ import org.apache.spark.broadcast.HttpBroadcast
 import org.apache.spark.network.util.ByteUnit
 import org.apache.spark.scheduler.{CompressedMapStatus, HighlyCompressedMapStatus}
 import org.apache.spark.storage._
-import org.apache.spark.util.{Utils, BoundedPriorityQueue, SerializableConfiguration, SerializableJobConf}
 import org.apache.spark.util.collection.CompactBuffer
+import org.apache.spark.util.{BoundedPriorityQueue, SerializableConfiguration, SerializableJobConf, Utils}
 
 /**
  * A Spark serializer that uses the [[https://code.google.com/p/kryo/ Kryo serialization library]].
diff --git a/core/src/test/scala/org/apache/spark/scheduler/MapStatusSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/MapStatusSuite.scala
index b8e466fab450..15c8de61b824 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/MapStatusSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/MapStatusSuite.scala
@@ -21,6 +21,7 @@ import org.apache.spark.storage.BlockManagerId
 
 import org.apache.spark.{SparkConf, SparkFunSuite}
 import org.apache.spark.serializer.JavaSerializer
+import org.roaringbitmap.RoaringBitmap
 
 import scala.util.Random
 
@@ -97,4 +98,34 @@ class MapStatusSuite extends SparkFunSuite {
     val buf = ser.newInstance().serialize(status)
     ser.newInstance().deserialize[MapStatus](buf)
   }
+
+  test("RoaringBitmap: runOptimize succeeded") {
+    val r = new RoaringBitmap
+    (1 to 200000).foreach(i =>
+      if (i % 200 != 0) {
+        r.add(i)
+      }
+    )
+    val size1 = r.getSizeInBytes
+    val success = r.runOptimize()
+    r.trim()
+    val size2 = r.getSizeInBytes
+    assert(size1 > size2)
+    assert(success)
+  }
+
+  test("RoaringBitmap: runOptimize failed") {
+    val r = new RoaringBitmap
+    (1 to 200000).foreach(i =>
+      if (i % 200 == 0) {
+        r.add(i)
+      }
+    )
+    val size1 = r.getSizeInBytes
+    val success = r.runOptimize()
+    r.trim()
+    val size2 = r.getSizeInBytes
+    assert(size1 === size2)
+    assert(!success)
+  }
 }
diff --git a/pom.xml b/pom.xml
index 2a8a44505717..940e2d8740bf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -637,7 +637,7 @@
       <dependency>
         <groupId>org.roaringbitmap</groupId>
         <artifactId>RoaringBitmap</artifactId>
-        <version>0.4.5</version>
+        <version>0.5.11</version>
       </dependency>
       <dependency>
         <groupId>commons-net</groupId>

From 98be8169f07eb0f1b8f01776c71d0e1ed3d5e4d5 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 17 Nov 2015 19:50:02 -0800
Subject: [PATCH 746/896] [SPARK-11737] [SQL] Fix serialization of UTF8String
 with Kyro

The default implementation of serialization UTF8String with Kyro may be not correct (BYTE_ARRAY_OFFSET could be different across JVM)

Author: Davies Liu <davies@databricks.com>

Closes #9704 from davies/kyro_string.
---
 unsafe/pom.xml                                |  4 ++++
 .../apache/spark/unsafe/types/UTF8String.java | 24 +++++++++++++++++--
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/unsafe/pom.xml b/unsafe/pom.xml
index caf1f77890b5..a1c1111364ee 100644
--- a/unsafe/pom.xml
+++ b/unsafe/pom.xml
@@ -36,6 +36,10 @@
   </properties>
 
   <dependencies>
+    <dependency>
+      <groupId>com.twitter</groupId>
+      <artifactId>chill_${scala.binary.version}</artifactId>
+    </dependency>
 
     <!-- Core dependencies -->
     <dependency>
diff --git a/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java b/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
index b7aecb5102ba..4bd3fd777207 100644
--- a/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
+++ b/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java
@@ -24,6 +24,11 @@
 import java.util.Arrays;
 import java.util.Map;
 
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.KryoSerializable;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 
@@ -38,9 +43,9 @@
  * <p>
  * Note: This is not designed for general use cases, should not be used outside SQL.
  */
-public final class UTF8String implements Comparable<UTF8String>, Externalizable {
+public final class UTF8String implements Comparable<UTF8String>, Externalizable, KryoSerializable {
 
-  // These are only updated by readExternal()
+  // These are only updated by readExternal() or read()
   @Nonnull
   private Object base;
   private long offset;
@@ -1003,4 +1008,19 @@ public void readExternal(ObjectInput in) throws IOException, ClassNotFoundExcept
     in.readFully((byte[]) base);
   }
 
+  @Override
+  public void write(Kryo kryo, Output out) {
+    byte[] bytes = getBytes();
+    out.writeInt(bytes.length);
+    out.write(bytes);
+  }
+
+  @Override
+  public void read(Kryo kryo, Input in) {
+    this.offset = BYTE_ARRAY_OFFSET;
+    this.numBytes = in.readInt();
+    this.base = new byte[numBytes];
+    in.read((byte[]) base);
+  }
+
 }

From 91f4b6f2db12650dfc33a576803ba8aeccf935dd Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 17 Nov 2015 21:40:58 -0800
Subject: [PATCH 747/896] [SPARK-11797][SQL] collect, first, and take should
 use encoders for serialization

They were previously using Spark's default serializer for serialization.

Author: Reynold Xin <rxin@databricks.com>

Closes #9787 from rxin/SPARK-11797.
---
 .../scala/org/apache/spark/sql/Dataset.scala  | 17 +++++++----
 .../org/apache/spark/sql/DatasetSuite.scala   | 30 ++++++++++++++++++-
 2 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index bd01dd4dc579..718ed812dd64 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -22,6 +22,7 @@ import scala.collection.JavaConverters._
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
 import org.apache.spark.api.java.function._
+import org.apache.spark.sql.catalyst.InternalRow
 
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
@@ -199,7 +200,6 @@ class Dataset[T] private[sql](
    * @since 1.6.0
    */
   def mapPartitions[U : Encoder](func: Iterator[T] => Iterator[U]): Dataset[U] = {
-    encoderFor[T].assertUnresolved()
     new Dataset[U](
       sqlContext,
       MapPartitions[T, U](
@@ -519,7 +519,7 @@ class Dataset[T] private[sql](
    * Returns the first element in this [[Dataset]].
    * @since 1.6.0
    */
-  def first(): T = rdd.first()
+  def first(): T = take(1).head
 
   /**
    * Returns an array that contains all the elements in this [[Dataset]].
@@ -530,7 +530,14 @@ class Dataset[T] private[sql](
    * For Java API, use [[collectAsList]].
    * @since 1.6.0
    */
-  def collect(): Array[T] = rdd.collect()
+  def collect(): Array[T] = {
+    // This is different from Dataset.rdd in that it collects Rows, and then runs the encoders
+    // to convert the rows into objects of type T.
+    val tEnc = resolvedTEncoder
+    val input = queryExecution.analyzed.output
+    val bound = tEnc.bind(input)
+    queryExecution.toRdd.map(_.copy()).collect().map(bound.fromRow)
+  }
 
   /**
    * Returns an array that contains all the elements in this [[Dataset]].
@@ -541,7 +548,7 @@ class Dataset[T] private[sql](
    * For Java API, use [[collectAsList]].
    * @since 1.6.0
    */
-  def collectAsList(): java.util.List[T] = rdd.collect().toSeq.asJava
+  def collectAsList(): java.util.List[T] = collect().toSeq.asJava
 
   /**
    * Returns the first `num` elements of this [[Dataset]] as an array.
@@ -551,7 +558,7 @@ class Dataset[T] private[sql](
    *
    * @since 1.6.0
    */
-  def take(num: Int): Array[T] = rdd.take(num)
+  def take(num: Int): Array[T] = withPlan(Limit(Literal(num), _)).collect()
 
   /**
    * Returns the first `num` elements of this [[Dataset]] as an array.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index a3922340ccc9..ea29428c5508 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql
 
+import java.io.{ObjectInput, ObjectOutput, Externalizable}
+
 import scala.language.postfixOps
 
 import org.apache.spark.sql.functions._
@@ -24,6 +26,20 @@ import org.apache.spark.sql.test.SharedSQLContext
 
 case class ClassData(a: String, b: Int)
 
+/**
+ * A class used to test serialization using encoders. This class throws exceptions when using
+ * Java serialization -- so the only way it can be "serialized" is through our encoders.
+ */
+case class NonSerializableCaseClass(value: String) extends Externalizable {
+  override def readExternal(in: ObjectInput): Unit = {
+    throw new UnsupportedOperationException
+  }
+
+  override def writeExternal(out: ObjectOutput): Unit = {
+    throw new UnsupportedOperationException
+  }
+}
+
 class DatasetSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
 
@@ -41,6 +57,16 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       1, 1, 1)
   }
 
+  test("collect, first, and take should use encoders for serialization") {
+    val item = NonSerializableCaseClass("abcd")
+    val ds = Seq(item).toDS()
+    assert(ds.collect().head == item)
+    assert(ds.collectAsList().get(0) == item)
+    assert(ds.first() == item)
+    assert(ds.take(1).head == item)
+    assert(ds.takeAsList(1).get(0) == item)
+  }
+
   test("as tuple") {
     val data = Seq(("a", 1), ("b", 2)).toDF("a", "b")
     checkAnswer(
@@ -75,6 +101,8 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
   ignore("Dataset should set the resolved encoders internally for maps") {
     // TODO: Enable this once we fix SPARK-11793.
+    // We inject a group by here to make sure this test case is future proof
+    // when we implement better pipelining and local execution mode.
     val ds: Dataset[(ClassData, Long)] = Seq(ClassData("one", 1), ClassData("two", 2)).toDS()
         .map(c => ClassData(c.a, c.b + 1))
         .groupBy(p => p).count()
@@ -219,7 +247,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       ("a", 30), ("b", 3), ("c", 1))
   }
 
-  test("groupBy function, fatMap") {
+  test("groupBy function, flatMap") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
     val agged = grouped.flatMap { case (g, iter) => Iterator(g._1, iter.map(_._2).sum.toString) }

From 8fb775ba874dd0488667bf299a7b49760062dc00 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 17 Nov 2015 22:13:15 -0800
Subject: [PATCH 748/896] [SPARK-11755][R] SparkR should export "predict"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The bug described at [SPARK-11755](https://issues.apache.org/jira/browse/SPARK-11755), after exporting ```predict``` we can both get the help information from the SparkR and base R package like the following:
```Java
> help(predict)
Help on topic ‘predict’ was found in the following packages:

  Package               Library
  SparkR                /Users/yanboliang/data/trunk2/spark/R/lib
  stats                 /Library/Frameworks/R.framework/Versions/3.2/Resources/library

Choose one

1: Make predictions from a model {SparkR}
2: Model Predictions {stats}
```

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9732 from yanboliang/spark-11755.
---
 R/pkg/R/generics.R | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 612e639f8ad9..afdeffc2abd8 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -1054,6 +1054,10 @@ setGeneric("year", function(x) { standardGeneric("year") })
 #' @export
 setGeneric("glm")
 
+#' @rdname predict
+#' @export
+setGeneric("predict", function(object, ...) { standardGeneric("predict") })
+
 #' @rdname rbind
 #' @export
 setGeneric("rbind", signature = "...")

From 446738e51fcda50cf2dc44123ff6bf12a1611dc0 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Tue, 17 Nov 2015 22:47:53 -0800
Subject: [PATCH 749/896] [SPARK-11761] Prevent the call to
 StreamingContext#stop() in the listener bus's thread

See discussion toward the tail of https://github.com/apache/spark/pull/9723
From zsxwing :
```
The user should not call stop or other long-time work in a listener since it will block the listener thread, and prevent from stopping SparkContext/StreamingContext.

I cannot see an approach since we need to stop the listener bus's thread before stopping SparkContext/StreamingContext totally.
```
Proposed solution is to prevent the call to StreamingContext#stop() in the listener bus's thread.

Author: tedyu <yuzhihong@gmail.com>

Closes #9741 from tedyu/master.
---
 .../spark/util/AsynchronousListenerBus.scala  | 46 +++++++++++--------
 .../spark/streaming/StreamingContext.scala    |  6 ++-
 .../streaming/StreamingListenerSuite.scala    | 34 ++++++++++++++
 3 files changed, 67 insertions(+), 19 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
index c20627b056be..6c1fca71f228 100644
--- a/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
+++ b/core/src/main/scala/org/apache/spark/util/AsynchronousListenerBus.scala
@@ -19,6 +19,7 @@ package org.apache.spark.util
 
 import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicBoolean
+import scala.util.DynamicVariable
 
 import org.apache.spark.SparkContext
 
@@ -60,25 +61,27 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
   private val listenerThread = new Thread(name) {
     setDaemon(true)
     override def run(): Unit = Utils.tryOrStopSparkContext(sparkContext) {
-      while (true) {
-        eventLock.acquire()
-        self.synchronized {
-          processingEvent = true
-        }
-        try {
-          val event = eventQueue.poll
-          if (event == null) {
-            // Get out of the while loop and shutdown the daemon thread
-            if (!stopped.get) {
-              throw new IllegalStateException("Polling `null` from eventQueue means" +
-                " the listener bus has been stopped. So `stopped` must be true")
-            }
-            return
-          }
-          postToAll(event)
-        } finally {
+      AsynchronousListenerBus.withinListenerThread.withValue(true) {
+        while (true) {
+          eventLock.acquire()
           self.synchronized {
-            processingEvent = false
+            processingEvent = true
+          }
+          try {
+            val event = eventQueue.poll
+            if (event == null) {
+              // Get out of the while loop and shutdown the daemon thread
+              if (!stopped.get) {
+                throw new IllegalStateException("Polling `null` from eventQueue means" +
+                  " the listener bus has been stopped. So `stopped` must be true")
+              }
+              return
+            }
+            postToAll(event)
+          } finally {
+            self.synchronized {
+              processingEvent = false
+            }
           }
         }
       }
@@ -177,3 +180,10 @@ private[spark] abstract class AsynchronousListenerBus[L <: AnyRef, E](name: Stri
    */
   def onDropEvent(event: E): Unit
 }
+
+private[spark] object AsynchronousListenerBus {
+  /* Allows for Context to check whether stop() call is made within listener thread
+  */
+  val withinListenerThread: DynamicVariable[Boolean] = new DynamicVariable[Boolean](false)
+}
+
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
index 97113835f3bd..aee172a4f549 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/StreamingContext.scala
@@ -44,7 +44,7 @@ import org.apache.spark.streaming.dstream._
 import org.apache.spark.streaming.receiver.{ActorReceiver, ActorSupervisorStrategy, Receiver}
 import org.apache.spark.streaming.scheduler.{JobScheduler, StreamingListener}
 import org.apache.spark.streaming.ui.{StreamingJobProgressListener, StreamingTab}
-import org.apache.spark.util.{CallSite, ShutdownHookManager, ThreadUtils, Utils}
+import org.apache.spark.util.{AsynchronousListenerBus, CallSite, ShutdownHookManager, ThreadUtils, Utils}
 
 /**
  * Main entry point for Spark Streaming functionality. It provides methods used to create
@@ -693,6 +693,10 @@ class StreamingContext private[streaming] (
    */
   def stop(stopSparkContext: Boolean, stopGracefully: Boolean): Unit = {
     var shutdownHookRefToRemove: AnyRef = null
+    if (AsynchronousListenerBus.withinListenerThread.value) {
+      throw new SparkException("Cannot stop StreamingContext within listener thread of" +
+        " AsynchronousListenerBus")
+    }
     synchronized {
       try {
         state match {
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
index 5dc0472c7770..df4575ab25aa 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StreamingListenerSuite.scala
@@ -21,6 +21,7 @@ import scala.collection.mutable.{ArrayBuffer, HashMap, SynchronizedBuffer, Synch
 import scala.concurrent.Future
 import scala.concurrent.ExecutionContext.Implicits.global
 
+import org.apache.spark.SparkException
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.streaming.dstream.DStream
 import org.apache.spark.streaming.receiver.Receiver
@@ -161,6 +162,14 @@ class StreamingListenerSuite extends TestSuiteBase with Matchers {
     }
   }
 
+  test("don't call ssc.stop in listener") {
+    ssc = new StreamingContext("local[2]", "ssc", Milliseconds(1000))
+    val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
+    inputStream.foreachRDD(_.count)
+
+    startStreamingContextAndCallStop(ssc)
+  }
+
   test("onBatchCompleted with successful batch") {
     ssc = new StreamingContext("local[2]", "test", Milliseconds(1000))
     val inputStream = ssc.receiverStream(new StreamingListenerSuiteReceiver)
@@ -207,6 +216,17 @@ class StreamingListenerSuite extends TestSuiteBase with Matchers {
     assert(failureReasons(1).contains("This is another failed job"))
   }
 
+  private def startStreamingContextAndCallStop(_ssc: StreamingContext): Unit = {
+    val contextStoppingCollector = new StreamingContextStoppingCollector(_ssc)
+    _ssc.addStreamingListener(contextStoppingCollector)
+    val batchCounter = new BatchCounter(_ssc)
+    _ssc.start()
+    // Make sure running at least one batch
+    batchCounter.waitUntilBatchesCompleted(expectedNumCompletedBatches = 1, timeout = 10000)
+    _ssc.stop()
+    assert(contextStoppingCollector.sparkExSeen)
+  }
+
   private def startStreamingContextAndCollectFailureReasons(
       _ssc: StreamingContext, isFailed: Boolean = false): Map[Int, String] = {
     val failureReasonsCollector = new FailureReasonsCollector()
@@ -320,3 +340,17 @@ class FailureReasonsCollector extends StreamingListener {
     }
   }
 }
+/**
+ * A StreamingListener that calls StreamingContext.stop().
+ */
+class StreamingContextStoppingCollector(val ssc: StreamingContext) extends StreamingListener {
+  @volatile var sparkExSeen = false
+  override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted) {
+    try {
+      ssc.stop()
+    } catch {
+      case se: SparkException =>
+        sparkExSeen = true
+    }
+  }
+}

From 67a5132c21bc8338adbae80b33b85e8fa0ddda34 Mon Sep 17 00:00:00 2001
From: RoyGaoVLIS <roygao@zju.edu.cn>
Date: Tue, 17 Nov 2015 23:00:49 -0800
Subject: [PATCH 750/896] [SPARK-7013][ML][TEST] Add unit test for spark.ml
 StandardScaler

I have added unit test for ML's StandardScaler By comparing with R's output, please review  for me.
Thx.

Author: RoyGaoVLIS <roygao@zju.edu.cn>

Closes #6665 from RoyGao/7013.
---
 .../ml/feature/StandardScalerSuite.scala      | 108 ++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala

diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
new file mode 100644
index 000000000000..879a3ae87500
--- /dev/null
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
@@ -0,0 +1,108 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.ml.feature
+
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
+import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.mllib.util.TestingUtils._
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
+
+class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext{
+
+  @transient var data: Array[Vector] = _
+  @transient var resWithStd: Array[Vector] = _
+  @transient var resWithMean: Array[Vector] = _
+  @transient var resWithBoth: Array[Vector] = _
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+
+    data = Array(
+      Vectors.dense(-2.0, 2.3, 0.0),
+      Vectors.dense(0.0, -5.1, 1.0),
+      Vectors.dense(1.7, -0.6, 3.3)
+    )
+    resWithMean = Array(
+      Vectors.dense(-1.9, 3.433333333333, -1.433333333333),
+      Vectors.dense(0.1, -3.966666666667, -0.433333333333),
+      Vectors.dense(1.8, 0.533333333333, 1.866666666667)
+    )
+    resWithStd = Array(
+      Vectors.dense(-1.079898494312, 0.616834091415, 0.0),
+      Vectors.dense(0.0, -1.367762550529, 0.590968109266),
+      Vectors.dense(0.917913720165, -0.160913241239, 1.950194760579)
+    )
+    resWithBoth = Array(
+      Vectors.dense(-1.0259035695965, 0.920781324866, -0.8470542899497),
+      Vectors.dense(0.0539949247156, -1.063815317078, -0.256086180682),
+      Vectors.dense(0.9719086448809, 0.143033992212, 1.103140470631)
+    )
+  }
+
+  def assertResult(dataframe: DataFrame): Unit = {
+    dataframe.select("standarded_features", "expected").collect().foreach {
+      case Row(vector1: Vector, vector2: Vector) =>
+        assert(vector1 ~== vector2 absTol 1E-5,
+          "The vector value is not correct after standardization.")
+    }
+  }
+
+  test("Standardization with default parameter") {
+    val df0 = sqlContext.createDataFrame(data.zip(resWithStd)).toDF("features", "expected")
+
+    val standardscaler0 = new StandardScaler()
+      .setInputCol("features")
+      .setOutputCol("standarded_features")
+      .fit(df0)
+
+    assertResult(standardscaler0.transform(df0))
+  }
+
+  test("Standardization with setter") {
+    val df1 = sqlContext.createDataFrame(data.zip(resWithBoth)).toDF("features", "expected")
+    val df2 = sqlContext.createDataFrame(data.zip(resWithMean)).toDF("features", "expected")
+    val df3 = sqlContext.createDataFrame(data.zip(data)).toDF("features", "expected")
+
+    val standardscaler1 = new StandardScaler()
+      .setInputCol("features")
+      .setOutputCol("standarded_features")
+      .setWithMean(true)
+      .setWithStd(true)
+      .fit(df1)
+
+    val standardscaler2 = new StandardScaler()
+      .setInputCol("features")
+      .setOutputCol("standarded_features")
+      .setWithMean(true)
+      .setWithStd(false)
+      .fit(df2)
+
+    val standardscaler3 = new StandardScaler()
+      .setInputCol("features")
+      .setOutputCol("standarded_features")
+      .setWithMean(false)
+      .setWithStd(false)
+      .fit(df3)
+
+    assertResult(standardscaler1.transform(df1))
+    assertResult(standardscaler2.transform(df2))
+    assertResult(standardscaler3.transform(df3))
+  }
+}

From 2f191c66b668fc97f82f44fd8336b6a4488c2f5d Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 17 Nov 2015 23:14:05 -0800
Subject: [PATCH 751/896] [SPARK-11643] [SQL] parse year with leading zero

Support the years between 0 <= year < 1000

Author: Davies Liu <davies@databricks.com>

Closes #9701 from davies/leading_zero.
---
 .../sql/catalyst/util/DateTimeUtils.scala     | 20 +++++++++++++++++--
 .../catalyst/util/DateTimeUtilsSuite.scala    | 17 +++++++++++++---
 2 files changed, 32 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index 8fb3f41f1bd6..17a5527f3fb2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -241,6 +241,10 @@ object DateTimeUtils {
           i += 3
         } else if (i < 2) {
           if (b == '-') {
+            if (i == 0 && j != 4) {
+              // year should have exact four digits
+              return None
+            }
             segments(i) = currentSegmentValue
             currentSegmentValue = 0
             i += 1
@@ -308,13 +312,17 @@ object DateTimeUtils {
     }
 
     segments(i) = currentSegmentValue
+    if (!justTime && i == 0 && j != 4) {
+      // year should have exact four digits
+      return None
+    }
 
     while (digitsMilli < 6) {
       segments(6) *= 10
       digitsMilli += 1
     }
 
-    if (!justTime && (segments(0) < 1000 || segments(0) > 9999 || segments(1) < 1 ||
+    if (!justTime && (segments(0) < 0 || segments(0) > 9999 || segments(1) < 1 ||
         segments(1) > 12 || segments(2) < 1 || segments(2) > 31)) {
       return None
     }
@@ -368,6 +376,10 @@ object DateTimeUtils {
     while (j < bytes.length && (i < 3 && !(bytes(j) == ' ' || bytes(j) == 'T'))) {
       val b = bytes(j)
       if (i < 2 && b == '-') {
+        if (i == 0 && j != 4) {
+          // year should have exact four digits
+          return None
+        }
         segments(i) = currentSegmentValue
         currentSegmentValue = 0
         i += 1
@@ -381,8 +393,12 @@ object DateTimeUtils {
       }
       j += 1
     }
+    if (i == 0 && j != 4) {
+      // year should have exact four digits
+      return None
+    }
     segments(i) = currentSegmentValue
-    if (segments(0) < 1000 || segments(0) > 9999 || segments(1) < 1 || segments(1) > 12 ||
+    if (segments(0) < 0 || segments(0) > 9999 || segments(1) < 1 || segments(1) > 12 ||
         segments(2) < 1 || segments(2) > 31) {
       return None
     }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
index 60d45422bc9b..faca128badfd 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
@@ -110,6 +110,10 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     c.set(Calendar.MILLISECOND, 0)
     assert(stringToDate(UTF8String.fromString("2015")).get ===
       millisToDays(c.getTimeInMillis))
+    c.set(1, 0, 1, 0, 0, 0)
+    c.set(Calendar.MILLISECOND, 0)
+    assert(stringToDate(UTF8String.fromString("0001")).get ===
+      millisToDays(c.getTimeInMillis))
     c = Calendar.getInstance()
     c.set(2015, 2, 1, 0, 0, 0)
     c.set(Calendar.MILLISECOND, 0)
@@ -134,11 +138,15 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     assert(stringToDate(UTF8String.fromString("2015.03.18")).isEmpty)
     assert(stringToDate(UTF8String.fromString("20150318")).isEmpty)
     assert(stringToDate(UTF8String.fromString("2015-031-8")).isEmpty)
+    assert(stringToDate(UTF8String.fromString("02015-03-18")).isEmpty)
+    assert(stringToDate(UTF8String.fromString("015-03-18")).isEmpty)
+    assert(stringToDate(UTF8String.fromString("015")).isEmpty)
+    assert(stringToDate(UTF8String.fromString("02015")).isEmpty)
   }
 
   test("string to time") {
     // Tests with UTC.
-    var c = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
+    val c = Calendar.getInstance(TimeZone.getTimeZone("UTC"))
     c.set(Calendar.MILLISECOND, 0)
 
     c.set(1900, 0, 1, 0, 0, 0)
@@ -174,9 +182,9 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     c.set(Calendar.MILLISECOND, 0)
     assert(stringToTimestamp(UTF8String.fromString("1969-12-31 16:00:00")).get ===
       c.getTimeInMillis * 1000)
-    c.set(2015, 0, 1, 0, 0, 0)
+    c.set(1, 0, 1, 0, 0, 0)
     c.set(Calendar.MILLISECOND, 0)
-    assert(stringToTimestamp(UTF8String.fromString("2015")).get ===
+    assert(stringToTimestamp(UTF8String.fromString("0001")).get ===
       c.getTimeInMillis * 1000)
     c = Calendar.getInstance()
     c.set(2015, 2, 1, 0, 0, 0)
@@ -319,6 +327,7 @@ class DateTimeUtilsSuite extends SparkFunSuite {
       UTF8String.fromString("2011-05-06 07:08:09.1000")).get === c.getTimeInMillis * 1000)
 
     assert(stringToTimestamp(UTF8String.fromString("238")).isEmpty)
+    assert(stringToTimestamp(UTF8String.fromString("00238")).isEmpty)
     assert(stringToTimestamp(UTF8String.fromString("2015-03-18 123142")).isEmpty)
     assert(stringToTimestamp(UTF8String.fromString("2015-03-18T123123")).isEmpty)
     assert(stringToTimestamp(UTF8String.fromString("2015-03-18X")).isEmpty)
@@ -326,6 +335,8 @@ class DateTimeUtilsSuite extends SparkFunSuite {
     assert(stringToTimestamp(UTF8String.fromString("2015.03.18")).isEmpty)
     assert(stringToTimestamp(UTF8String.fromString("20150318")).isEmpty)
     assert(stringToTimestamp(UTF8String.fromString("2015-031-8")).isEmpty)
+    assert(stringToTimestamp(UTF8String.fromString("02015-01-18")).isEmpty)
+    assert(stringToTimestamp(UTF8String.fromString("015-01-18")).isEmpty)
     assert(stringToTimestamp(
       UTF8String.fromString("2015-03-18T12:03.17-20:0")).isEmpty)
     assert(stringToTimestamp(

From 9154f89befb7a33d4853cea95efd7dc6b25d033b Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Tue, 17 Nov 2015 23:44:06 -0800
Subject: [PATCH 752/896] [SPARK-11728] Replace example code in ml-ensembles.md
 using include_example

JIRA issue https://issues.apache.org/jira/browse/SPARK-11728.

The ml-ensembles.md file contains `OneVsRestExample`. Instead of writing new code files of two `OneVsRestExample`s, I use two existing files in the examples directory, they are `OneVsRestExample.scala` and `JavaOneVsRestExample.scala`.

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9716 from yinxusen/SPARK-11728.
---
 docs/ml-ensembles.md                          | 754 +-----------------
 ...aGradientBoostedTreeClassifierExample.java | 102 +++
 ...vaGradientBoostedTreeRegressorExample.java |  90 +++
 .../examples/ml/JavaOneVsRestExample.java     |   4 +
 .../ml/JavaRandomForestClassifierExample.java | 101 +++
 .../ml/JavaRandomForestRegressorExample.java  |  90 +++
 ...radient_boosted_tree_classifier_example.py |  77 ++
 ...gradient_boosted_tree_regressor_example.py |  74 ++
 .../ml/random_forest_classifier_example.py    |  77 ++
 .../ml/random_forest_regressor_example.py     |  74 ++
 ...GradientBoostedTreeClassifierExample.scala |  97 +++
 .../GradientBoostedTreeRegressorExample.scala |  85 ++
 .../spark/examples/ml/OneVsRestExample.scala  |   4 +
 .../ml/RandomForestClassifierExample.scala    |  97 +++
 .../ml/RandomForestRegressorExample.scala     |  84 ++
 15 files changed, 1070 insertions(+), 740 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeClassifierExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeRegressorExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestClassifierExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestRegressorExample.java
 create mode 100644 examples/src/main/python/ml/gradient_boosted_tree_classifier_example.py
 create mode 100644 examples/src/main/python/ml/gradient_boosted_tree_regressor_example.py
 create mode 100644 examples/src/main/python/ml/random_forest_classifier_example.py
 create mode 100644 examples/src/main/python/ml/random_forest_regressor_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeClassifierExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeRegressorExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/RandomForestClassifierExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/RandomForestRegressorExample.scala

diff --git a/docs/ml-ensembles.md b/docs/ml-ensembles.md
index ce15f5e6466e..f6c3c30d5334 100644
--- a/docs/ml-ensembles.md
+++ b/docs/ml-ensembles.md
@@ -115,194 +115,21 @@ We use two feature transformers to prepare the data; these help index categories
 
 Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.classification.RandomForestClassifier) for more details.
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.classification.RandomForestClassifier
-import org.apache.spark.ml.classification.RandomForestClassificationModel
-import org.apache.spark.ml.feature.{StringIndexer, IndexToString, VectorIndexer}
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-val labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data)
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a RandomForest model.
-val rf = new RandomForestClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures")
-  .setNumTrees(10)
-
-// Convert indexed labels back to original labels.
-val labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels)
-
-// Chain indexers and forest in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(labelIndexer, featureIndexer, rf, labelConverter))
-
-// Train model.  This also runs the indexers.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision")
-val accuracy = evaluator.evaluate(predictions)
-println("Test Error = " + (1.0 - accuracy))
-
-val rfModel = model.stages(2).asInstanceOf[RandomForestClassificationModel]
-println("Learned classification forest model:\n" + rfModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/RandomForestClassifierExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 Refer to the [Java API docs](api/java/org/apache/spark/ml/classification/RandomForestClassifier.html) for more details.
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.classification.RandomForestClassifier;
-import org.apache.spark.ml.classification.RandomForestClassificationModel;
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
-import org.apache.spark.ml.feature.*;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read().format("libsvm")
-  .load("data/mllib/sample_libsvm_data.txt");
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-StringIndexerModel labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data);
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a RandomForest model.
-RandomForestClassifier rf = new RandomForestClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures");
-
-// Convert indexed labels back to original labels.
-IndexToString labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels());
-
-// Chain indexers and forest in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {labelIndexer, featureIndexer, rf, labelConverter});
-
-// Train model.  This also runs the indexers.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision");
-double accuracy = evaluator.evaluate(predictions);
-System.out.println("Test Error = " + (1.0 - accuracy));
-
-RandomForestClassificationModel rfModel =
-  (RandomForestClassificationModel)(model.stages()[2]);
-System.out.println("Learned classification forest model:\n" + rfModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaRandomForestClassifierExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 
 Refer to the [Python API docs](api/python/pyspark.ml.html#pyspark.ml.classification.RandomForestClassifier) for more details.
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.classification import RandomForestClassifier
-from pyspark.ml.feature import StringIndexer, VectorIndexer
-from pyspark.ml.evaluation import MulticlassClassificationEvaluator
-
-# Load and parse the data file, converting it to a DataFrame.
-data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-# Index labels, adding metadata to the label column.
-# Fit on whole dataset to include all labels in index.
-labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
-# Automatically identify categorical features, and index them.
-# Set maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a RandomForest model.
-rf = RandomForestClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures")
-
-# Chain indexers and forest in a Pipeline
-pipeline = Pipeline(stages=[labelIndexer, featureIndexer, rf])
-
-# Train model.  This also runs the indexers.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "indexedLabel", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = MulticlassClassificationEvaluator(
-    labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
-accuracy = evaluator.evaluate(predictions)
-print "Test Error = %g" % (1.0 - accuracy)
-
-rfModel = model.stages[2]
-print rfModel # summary only
-{% endhighlight %}
+{% include_example python/ml/random_forest_classifier_example.py %}
 </div>
 </div>
 
@@ -316,167 +143,21 @@ We use a feature transformer to index categorical features, adding metadata to t
 
 Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.regression.RandomForestRegressor) for more details.
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.regression.RandomForestRegressor
-import org.apache.spark.ml.regression.RandomForestRegressionModel
-import org.apache.spark.ml.feature.VectorIndexer
-import org.apache.spark.ml.evaluation.RegressionEvaluator
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a RandomForest model.
-val rf = new RandomForestRegressor()
-  .setLabelCol("label")
-  .setFeaturesCol("indexedFeatures")
-
-// Chain indexer and forest in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(featureIndexer, rf))
-
-// Train model.  This also runs the indexer.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse")
-val rmse = evaluator.evaluate(predictions)
-println("Root Mean Squared Error (RMSE) on test data = " + rmse)
-
-val rfModel = model.stages(1).asInstanceOf[RandomForestRegressionModel]
-println("Learned regression forest model:\n" + rfModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/RandomForestRegressorExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 Refer to the [Java API docs](api/java/org/apache/spark/ml/regression/RandomForestRegressor.html) for more details.
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.evaluation.RegressionEvaluator;
-import org.apache.spark.ml.feature.VectorIndexer;
-import org.apache.spark.ml.feature.VectorIndexerModel;
-import org.apache.spark.ml.regression.RandomForestRegressionModel;
-import org.apache.spark.ml.regression.RandomForestRegressor;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read().format("libsvm")
-  .load("data/mllib/sample_libsvm_data.txt");
-
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a RandomForest model.
-RandomForestRegressor rf = new RandomForestRegressor()
-  .setLabelCol("label")
-  .setFeaturesCol("indexedFeatures");
-
-// Chain indexer and forest in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {featureIndexer, rf});
-
-// Train model.  This also runs the indexer.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("prediction", "label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-RegressionEvaluator evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse");
-double rmse = evaluator.evaluate(predictions);
-System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
-
-RandomForestRegressionModel rfModel =
-  (RandomForestRegressionModel)(model.stages()[1]);
-System.out.println("Learned regression forest model:\n" + rfModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaRandomForestRegressorExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 
 Refer to the [Python API docs](api/python/pyspark.ml.html#pyspark.ml.regression.RandomForestRegressor) for more details.
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.regression import RandomForestRegressor
-from pyspark.ml.feature import VectorIndexer
-from pyspark.ml.evaluation import RegressionEvaluator
-
-# Load and parse the data file, converting it to a DataFrame.
-data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-# Automatically identify categorical features, and index them.
-# Set maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a RandomForest model.
-rf = RandomForestRegressor(featuresCol="indexedFeatures")
-
-# Chain indexer and forest in a Pipeline
-pipeline = Pipeline(stages=[featureIndexer, rf])
-
-# Train model.  This also runs the indexer.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = RegressionEvaluator(
-    labelCol="label", predictionCol="prediction", metricName="rmse")
-rmse = evaluator.evaluate(predictions)
-print "Root Mean Squared Error (RMSE) on test data = %g" % rmse
-
-rfModel = model.stages[1]
-print rfModel # summary only
-{% endhighlight %}
+{% include_example python/ml/random_forest_regressor_example.py %}
 </div>
 </div>
 
@@ -560,194 +241,21 @@ We use two feature transformers to prepare the data; these help index categories
 
 Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.classification.GBTClassifier) for more details.
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.classification.GBTClassifier
-import org.apache.spark.ml.classification.GBTClassificationModel
-import org.apache.spark.ml.feature.{StringIndexer, IndexToString, VectorIndexer}
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-val labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data)
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a GBT model.
-val gbt = new GBTClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures")
-  .setMaxIter(10)
-
-// Convert indexed labels back to original labels.
-val labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels)
-
-// Chain indexers and GBT in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(labelIndexer, featureIndexer, gbt, labelConverter))
-
-// Train model.  This also runs the indexers.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision")
-val accuracy = evaluator.evaluate(predictions)
-println("Test Error = " + (1.0 - accuracy))
-
-val gbtModel = model.stages(2).asInstanceOf[GBTClassificationModel]
-println("Learned classification GBT model:\n" + gbtModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/GradientBoostedTreeClassifierExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 Refer to the [Java API docs](api/java/org/apache/spark/ml/classification/GBTClassifier.html) for more details.
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.classification.GBTClassifier;
-import org.apache.spark.ml.classification.GBTClassificationModel;
-import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
-import org.apache.spark.ml.feature.*;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-DataFrame data sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
-
-// Index labels, adding metadata to the label column.
-// Fit on whole dataset to include all labels in index.
-StringIndexerModel labelIndexer = new StringIndexer()
-  .setInputCol("label")
-  .setOutputCol("indexedLabel")
-  .fit(data);
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a GBT model.
-GBTClassifier gbt = new GBTClassifier()
-  .setLabelCol("indexedLabel")
-  .setFeaturesCol("indexedFeatures")
-  .setMaxIter(10);
-
-// Convert indexed labels back to original labels.
-IndexToString labelConverter = new IndexToString()
-  .setInputCol("prediction")
-  .setOutputCol("predictedLabel")
-  .setLabels(labelIndexer.labels());
-
-// Chain indexers and GBT in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {labelIndexer, featureIndexer, gbt, labelConverter});
-
-// Train model.  This also runs the indexers.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("predictedLabel", "label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
-  .setLabelCol("indexedLabel")
-  .setPredictionCol("prediction")
-  .setMetricName("precision");
-double accuracy = evaluator.evaluate(predictions);
-System.out.println("Test Error = " + (1.0 - accuracy));
-
-GBTClassificationModel gbtModel =
-  (GBTClassificationModel)(model.stages()[2]);
-System.out.println("Learned classification GBT model:\n" + gbtModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaGradientBoostedTreeClassifierExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 
 Refer to the [Python API docs](api/python/pyspark.ml.html#pyspark.ml.classification.GBTClassifier) for more details.
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.classification import GBTClassifier
-from pyspark.ml.feature import StringIndexer, VectorIndexer
-from pyspark.ml.evaluation import MulticlassClassificationEvaluator
-
-# Load and parse the data file, converting it to a DataFrame.
-data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-# Index labels, adding metadata to the label column.
-# Fit on whole dataset to include all labels in index.
-labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
-# Automatically identify categorical features, and index them.
-# Set maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a GBT model.
-gbt = GBTClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures", maxIter=10)
-
-# Chain indexers and GBT in a Pipeline
-pipeline = Pipeline(stages=[labelIndexer, featureIndexer, gbt])
-
-# Train model.  This also runs the indexers.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "indexedLabel", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = MulticlassClassificationEvaluator(
-    labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
-accuracy = evaluator.evaluate(predictions)
-print "Test Error = %g" % (1.0 - accuracy)
-
-gbtModel = model.stages[2]
-print gbtModel # summary only
-{% endhighlight %}
+{% include_example python/ml/gradient_boosted_tree_classifier_example.py %}
 </div>
 </div>
 
@@ -761,168 +269,21 @@ be true in general.
 
 Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.regression.GBTRegressor) for more details.
 
-{% highlight scala %}
-import org.apache.spark.ml.Pipeline
-import org.apache.spark.ml.regression.GBTRegressor
-import org.apache.spark.ml.regression.GBTRegressionModel
-import org.apache.spark.ml.feature.VectorIndexer
-import org.apache.spark.ml.evaluation.RegressionEvaluator
-
-// Load and parse the data file, converting it to a DataFrame.
-val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-val featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data)
-
-// Split the data into training and test sets (30% held out for testing)
-val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
-
-// Train a GBT model.
-val gbt = new GBTRegressor()
-  .setLabelCol("label")
-  .setFeaturesCol("indexedFeatures")
-  .setMaxIter(10)
-
-// Chain indexer and GBT in a Pipeline
-val pipeline = new Pipeline()
-  .setStages(Array(featureIndexer, gbt))
-
-// Train model.  This also runs the indexer.
-val model = pipeline.fit(trainingData)
-
-// Make predictions.
-val predictions = model.transform(testData)
-
-// Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-// Select (prediction, true label) and compute test error
-val evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse")
-val rmse = evaluator.evaluate(predictions)
-println("Root Mean Squared Error (RMSE) on test data = " + rmse)
-
-val gbtModel = model.stages(1).asInstanceOf[GBTRegressionModel]
-println("Learned regression GBT model:\n" + gbtModel.toDebugString)
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/GradientBoostedTreeRegressorExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 Refer to the [Java API docs](api/java/org/apache/spark/ml/regression/GBTRegressor.html) for more details.
 
-{% highlight java %}
-import org.apache.spark.ml.Pipeline;
-import org.apache.spark.ml.PipelineModel;
-import org.apache.spark.ml.PipelineStage;
-import org.apache.spark.ml.evaluation.RegressionEvaluator;
-import org.apache.spark.ml.feature.VectorIndexer;
-import org.apache.spark.ml.feature.VectorIndexerModel;
-import org.apache.spark.ml.regression.GBTRegressionModel;
-import org.apache.spark.ml.regression.GBTRegressor;
-import org.apache.spark.sql.DataFrame;
-
-// Load and parse the data file, converting it to a DataFrame.
-DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
-
-// Automatically identify categorical features, and index them.
-// Set maxCategories so features with > 4 distinct values are treated as continuous.
-VectorIndexerModel featureIndexer = new VectorIndexer()
-  .setInputCol("features")
-  .setOutputCol("indexedFeatures")
-  .setMaxCategories(4)
-  .fit(data);
-
-// Split the data into training and test sets (30% held out for testing)
-DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
-DataFrame trainingData = splits[0];
-DataFrame testData = splits[1];
-
-// Train a GBT model.
-GBTRegressor gbt = new GBTRegressor()
-  .setLabelCol("label")
-  .setFeaturesCol("indexedFeatures")
-  .setMaxIter(10);
-
-// Chain indexer and GBT in a Pipeline
-Pipeline pipeline = new Pipeline()
-  .setStages(new PipelineStage[] {featureIndexer, gbt});
-
-// Train model.  This also runs the indexer.
-PipelineModel model = pipeline.fit(trainingData);
-
-// Make predictions.
-DataFrame predictions = model.transform(testData);
-
-// Select example rows to display.
-predictions.select("prediction", "label", "features").show(5);
-
-// Select (prediction, true label) and compute test error
-RegressionEvaluator evaluator = new RegressionEvaluator()
-  .setLabelCol("label")
-  .setPredictionCol("prediction")
-  .setMetricName("rmse");
-double rmse = evaluator.evaluate(predictions);
-System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
-
-GBTRegressionModel gbtModel =
-  (GBTRegressionModel)(model.stages()[1]);
-System.out.println("Learned regression GBT model:\n" + gbtModel.toDebugString());
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaGradientBoostedTreeRegressorExample.java %}
 </div>
 
 <div data-lang="python" markdown="1">
 
 Refer to the [Python API docs](api/python/pyspark.ml.html#pyspark.ml.regression.GBTRegressor) for more details.
 
-{% highlight python %}
-from pyspark.ml import Pipeline
-from pyspark.ml.regression import GBTRegressor
-from pyspark.ml.feature import VectorIndexer
-from pyspark.ml.evaluation import RegressionEvaluator
-
-# Load and parse the data file, converting it to a DataFrame.
-data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-# Automatically identify categorical features, and index them.
-# Set maxCategories so features with > 4 distinct values are treated as continuous.
-featureIndexer =\
-    VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
-
-# Split the data into training and test sets (30% held out for testing)
-(trainingData, testData) = data.randomSplit([0.7, 0.3])
-
-# Train a GBT model.
-gbt = GBTRegressor(featuresCol="indexedFeatures", maxIter=10)
-
-# Chain indexer and GBT in a Pipeline
-pipeline = Pipeline(stages=[featureIndexer, gbt])
-
-# Train model.  This also runs the indexer.
-model = pipeline.fit(trainingData)
-
-# Make predictions.
-predictions = model.transform(testData)
-
-# Select example rows to display.
-predictions.select("prediction", "label", "features").show(5)
-
-# Select (prediction, true label) and compute test error
-evaluator = RegressionEvaluator(
-    labelCol="label", predictionCol="prediction", metricName="rmse")
-rmse = evaluator.evaluate(predictions)
-print "Root Mean Squared Error (RMSE) on test data = %g" % rmse
-
-gbtModel = model.stages[1]
-print gbtModel # summary only
-{% endhighlight %}
+{% include_example python/ml/gradient_boosted_tree_regressor_example.py %}
 </div>
 </div>
 
@@ -945,100 +306,13 @@ The example below demonstrates how to load the
 
 Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.classifier.OneVsRest) for more details.
 
-{% highlight scala %}
-import org.apache.spark.ml.classification.{LogisticRegression, OneVsRest}
-import org.apache.spark.mllib.evaluation.MulticlassMetrics
-import org.apache.spark.sql.{Row, SQLContext}
-
-val sqlContext = new SQLContext(sc)
-
-// parse data into dataframe
-val data = sqlContext.read.format("libsvm")
-  .load("data/mllib/sample_multiclass_classification_data.txt")
-val Array(train, test) = data.randomSplit(Array(0.7, 0.3))
-
-// instantiate multiclass learner and train
-val ovr = new OneVsRest().setClassifier(new LogisticRegression)
-
-val ovrModel = ovr.fit(train)
-
-// score model on test data
-val predictions = ovrModel.transform(test).select("prediction", "label")
-val predictionsAndLabels = predictions.map {case Row(p: Double, l: Double) => (p, l)}
-
-// compute confusion matrix
-val metrics = new MulticlassMetrics(predictionsAndLabels)
-println(metrics.confusionMatrix)
-
-// the Iris DataSet has three classes
-val numClasses = 3
-
-println("label\tfpr\n")
-(0 until numClasses).foreach { index =>
-  val label = index.toDouble
-  println(label + "\t" + metrics.falsePositiveRate(label))
-}
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/ml/OneVsRestExample.scala %}
 </div>
 
 <div data-lang="java" markdown="1">
 
 Refer to the [Java API docs](api/java/org/apache/spark/ml/classification/OneVsRest.html) for more details.
 
-{% highlight java %}
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.ml.classification.LogisticRegression;
-import org.apache.spark.ml.classification.OneVsRest;
-import org.apache.spark.ml.classification.OneVsRestModel;
-import org.apache.spark.mllib.evaluation.MulticlassMetrics;
-import org.apache.spark.mllib.linalg.Matrix;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.SQLContext;
-
-SparkConf conf = new SparkConf().setAppName("JavaOneVsRestExample");
-JavaSparkContext jsc = new JavaSparkContext(conf);
-SQLContext jsql = new SQLContext(jsc);
-
-DataFrame dataFrame = sqlContext.read().format("libsvm")
-  .load("data/mllib/sample_multiclass_classification_data.txt");
-
-DataFrame[] splits = dataFrame.randomSplit(new double[] {0.7, 0.3}, 12345);
-DataFrame train = splits[0];
-DataFrame test = splits[1];
-
-// instantiate the One Vs Rest Classifier
-OneVsRest ovr = new OneVsRest().setClassifier(new LogisticRegression());
-
-// train the multiclass model
-OneVsRestModel ovrModel = ovr.fit(train.cache());
-
-// score the model on test data
-DataFrame predictions = ovrModel
-  .transform(test)
-  .select("prediction", "label");
-
-// obtain metrics
-MulticlassMetrics metrics = new MulticlassMetrics(predictions);
-Matrix confusionMatrix = metrics.confusionMatrix();
-
-// output the Confusion Matrix
-System.out.println("Confusion Matrix");
-System.out.println(confusionMatrix);
-
-// compute the false positive rate per label
-System.out.println();
-System.out.println("label\tfpr\n");
-
-// the Iris DataSet has three classes
-int numClasses = 3;
-for (int index = 0; index < numClasses; index++) {
-  double label = (double) index;
-  System.out.print(label);
-  System.out.print("\t");
-  System.out.print(metrics.falsePositiveRate(label));
-  System.out.println();
-}
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/ml/JavaOneVsRestExample.java %}
 </div>
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeClassifierExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeClassifierExample.java
new file mode 100644
index 000000000000..848fe6566c1e
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeClassifierExample.java
@@ -0,0 +1,102 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.classification.GBTClassificationModel;
+import org.apache.spark.ml.classification.GBTClassifier;
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
+import org.apache.spark.ml.feature.*;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaGradientBoostedTreeClassifierExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaGradientBoostedTreeClassifierExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    StringIndexerModel labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data);
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a GBT model.
+    GBTClassifier gbt = new GBTClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures")
+      .setMaxIter(10);
+
+    // Convert indexed labels back to original labels.
+    IndexToString labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels());
+
+    // Chain indexers and GBT in a Pipeline
+    Pipeline pipeline = new Pipeline()
+      .setStages(new PipelineStage[] {labelIndexer, featureIndexer, gbt, labelConverter});
+
+    // Train model.  This also runs the indexers.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision");
+    double accuracy = evaluator.evaluate(predictions);
+    System.out.println("Test Error = " + (1.0 - accuracy));
+
+    GBTClassificationModel gbtModel = (GBTClassificationModel)(model.stages()[2]);
+    System.out.println("Learned classification GBT model:\n" + gbtModel.toDebugString());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeRegressorExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeRegressorExample.java
new file mode 100644
index 000000000000..1f67b0842db0
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaGradientBoostedTreeRegressorExample.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.evaluation.RegressionEvaluator;
+import org.apache.spark.ml.feature.VectorIndexer;
+import org.apache.spark.ml.feature.VectorIndexerModel;
+import org.apache.spark.ml.regression.GBTRegressionModel;
+import org.apache.spark.ml.regression.GBTRegressor;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaGradientBoostedTreeRegressorExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaGradientBoostedTreeRegressorExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a GBT model.
+    GBTRegressor gbt = new GBTRegressor()
+      .setLabelCol("label")
+      .setFeaturesCol("indexedFeatures")
+      .setMaxIter(10);
+
+    // Chain indexer and GBT in a Pipeline
+    Pipeline pipeline = new Pipeline().setStages(new PipelineStage[] {featureIndexer, gbt});
+
+    // Train model.  This also runs the indexer.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    RegressionEvaluator evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse");
+    double rmse = evaluator.evaluate(predictions);
+    System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
+
+    GBTRegressionModel gbtModel = (GBTRegressionModel)(model.stages()[1]);
+    System.out.println("Learned regression GBT model:\n" + gbtModel.toDebugString());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
index f0d92a56bee7..42374e77acf0 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaOneVsRestExample.java
@@ -21,6 +21,7 @@
 
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
 import org.apache.spark.ml.classification.LogisticRegression;
 import org.apache.spark.ml.classification.OneVsRest;
 import org.apache.spark.ml.classification.OneVsRestModel;
@@ -31,6 +32,7 @@
 import org.apache.spark.sql.DataFrame;
 import org.apache.spark.sql.SQLContext;
 import org.apache.spark.sql.types.StructField;
+// $example off$
 
 /**
  * An example runner for Multiclass to Binary Reduction with One Vs Rest.
@@ -61,6 +63,7 @@ public static void main(String[] args) {
     JavaSparkContext jsc = new JavaSparkContext(conf);
     SQLContext jsql = new SQLContext(jsc);
 
+    // $example on$
     // configure the base classifier
     LogisticRegression classifier = new LogisticRegression()
       .setMaxIter(params.maxIter)
@@ -125,6 +128,7 @@ public static void main(String[] args) {
     System.out.println(confusionMatrix);
     System.out.println();
     System.out.println(results);
+    // $example off$
 
     jsc.stop();
   }
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestClassifierExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestClassifierExample.java
new file mode 100644
index 000000000000..5a6249666029
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestClassifierExample.java
@@ -0,0 +1,101 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.classification.RandomForestClassificationModel;
+import org.apache.spark.ml.classification.RandomForestClassifier;
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator;
+import org.apache.spark.ml.feature.*;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaRandomForestClassifierExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaRandomForestClassifierExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    StringIndexerModel labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data);
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a RandomForest model.
+    RandomForestClassifier rf = new RandomForestClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures");
+
+    // Convert indexed labels back to original labels.
+    IndexToString labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels());
+
+    // Chain indexers and forest in a Pipeline
+    Pipeline pipeline = new Pipeline()
+      .setStages(new PipelineStage[] {labelIndexer, featureIndexer, rf, labelConverter});
+
+    // Train model. This also runs the indexers.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    MulticlassClassificationEvaluator evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision");
+    double accuracy = evaluator.evaluate(predictions);
+    System.out.println("Test Error = " + (1.0 - accuracy));
+
+    RandomForestClassificationModel rfModel = (RandomForestClassificationModel)(model.stages()[2]);
+    System.out.println("Learned classification forest model:\n" + rfModel.toDebugString());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestRegressorExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestRegressorExample.java
new file mode 100644
index 000000000000..05782a0724a7
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaRandomForestRegressorExample.java
@@ -0,0 +1,90 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaSparkContext;
+// $example on$
+import org.apache.spark.ml.Pipeline;
+import org.apache.spark.ml.PipelineModel;
+import org.apache.spark.ml.PipelineStage;
+import org.apache.spark.ml.evaluation.RegressionEvaluator;
+import org.apache.spark.ml.feature.VectorIndexer;
+import org.apache.spark.ml.feature.VectorIndexerModel;
+import org.apache.spark.ml.regression.RandomForestRegressionModel;
+import org.apache.spark.ml.regression.RandomForestRegressor;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.SQLContext;
+// $example off$
+
+public class JavaRandomForestRegressorExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("JavaRandomForestRegressorExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    DataFrame data = sqlContext.read().format("libsvm").load("data/mllib/sample_libsvm_data.txt");
+
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    VectorIndexerModel featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data);
+
+    // Split the data into training and test sets (30% held out for testing)
+    DataFrame[] splits = data.randomSplit(new double[] {0.7, 0.3});
+    DataFrame trainingData = splits[0];
+    DataFrame testData = splits[1];
+
+    // Train a RandomForest model.
+    RandomForestRegressor rf = new RandomForestRegressor()
+      .setLabelCol("label")
+      .setFeaturesCol("indexedFeatures");
+
+    // Chain indexer and forest in a Pipeline
+    Pipeline pipeline = new Pipeline()
+      .setStages(new PipelineStage[] {featureIndexer, rf});
+
+    // Train model.  This also runs the indexer.
+    PipelineModel model = pipeline.fit(trainingData);
+
+    // Make predictions.
+    DataFrame predictions = model.transform(testData);
+
+    // Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5);
+
+    // Select (prediction, true label) and compute test error
+    RegressionEvaluator evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse");
+    double rmse = evaluator.evaluate(predictions);
+    System.out.println("Root Mean Squared Error (RMSE) on test data = " + rmse);
+
+    RandomForestRegressionModel rfModel = (RandomForestRegressionModel)(model.stages()[1]);
+    System.out.println("Learned regression forest model:\n" + rfModel.toDebugString());
+    // $example off$
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/python/ml/gradient_boosted_tree_classifier_example.py b/examples/src/main/python/ml/gradient_boosted_tree_classifier_example.py
new file mode 100644
index 000000000000..028497651fbf
--- /dev/null
+++ b/examples/src/main/python/ml/gradient_boosted_tree_classifier_example.py
@@ -0,0 +1,77 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Gradient Boosted Tree Classifier Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.ml import Pipeline
+from pyspark.ml.classification import GBTClassifier
+from pyspark.ml.feature import StringIndexer, VectorIndexer
+from pyspark.ml.evaluation import MulticlassClassificationEvaluator
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="gradient_boosted_tree_classifier_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    # Index labels, adding metadata to the label column.
+    # Fit on whole dataset to include all labels in index.
+    labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
+    # Automatically identify categorical features, and index them.
+    # Set maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a GBT model.
+    gbt = GBTClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures", maxIter=10)
+
+    # Chain indexers and GBT in a Pipeline
+    pipeline = Pipeline(stages=[labelIndexer, featureIndexer, gbt])
+
+    # Train model.  This also runs the indexers.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "indexedLabel", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = MulticlassClassificationEvaluator(
+        labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
+    accuracy = evaluator.evaluate(predictions)
+    print("Test Error = %g" % (1.0 - accuracy))
+
+    gbtModel = model.stages[2]
+    print(gbtModel)  # summary only
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/python/ml/gradient_boosted_tree_regressor_example.py b/examples/src/main/python/ml/gradient_boosted_tree_regressor_example.py
new file mode 100644
index 000000000000..4246e133a903
--- /dev/null
+++ b/examples/src/main/python/ml/gradient_boosted_tree_regressor_example.py
@@ -0,0 +1,74 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Gradient Boosted Tree Regressor Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.ml import Pipeline
+from pyspark.ml.regression import GBTRegressor
+from pyspark.ml.feature import VectorIndexer
+from pyspark.ml.evaluation import RegressionEvaluator
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="gradient_boosted_tree_regressor_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    # Automatically identify categorical features, and index them.
+    # Set maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a GBT model.
+    gbt = GBTRegressor(featuresCol="indexedFeatures", maxIter=10)
+
+    # Chain indexer and GBT in a Pipeline
+    pipeline = Pipeline(stages=[featureIndexer, gbt])
+
+    # Train model.  This also runs the indexer.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = RegressionEvaluator(
+        labelCol="label", predictionCol="prediction", metricName="rmse")
+    rmse = evaluator.evaluate(predictions)
+    print("Root Mean Squared Error (RMSE) on test data = %g" % rmse)
+
+    gbtModel = model.stages[1]
+    print(gbtModel)  # summary only
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/python/ml/random_forest_classifier_example.py b/examples/src/main/python/ml/random_forest_classifier_example.py
new file mode 100644
index 000000000000..b3530d4f41c8
--- /dev/null
+++ b/examples/src/main/python/ml/random_forest_classifier_example.py
@@ -0,0 +1,77 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Random Forest Classifier Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.ml import Pipeline
+from pyspark.ml.classification import RandomForestClassifier
+from pyspark.ml.feature import StringIndexer, VectorIndexer
+from pyspark.ml.evaluation import MulticlassClassificationEvaluator
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="random_forest_classifier_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    # Index labels, adding metadata to the label column.
+    # Fit on whole dataset to include all labels in index.
+    labelIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel").fit(data)
+    # Automatically identify categorical features, and index them.
+    # Set maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a RandomForest model.
+    rf = RandomForestClassifier(labelCol="indexedLabel", featuresCol="indexedFeatures")
+
+    # Chain indexers and forest in a Pipeline
+    pipeline = Pipeline(stages=[labelIndexer, featureIndexer, rf])
+
+    # Train model.  This also runs the indexers.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "indexedLabel", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = MulticlassClassificationEvaluator(
+        labelCol="indexedLabel", predictionCol="prediction", metricName="precision")
+    accuracy = evaluator.evaluate(predictions)
+    print("Test Error = %g" % (1.0 - accuracy))
+
+    rfModel = model.stages[2]
+    print(rfModel)  # summary only
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/python/ml/random_forest_regressor_example.py b/examples/src/main/python/ml/random_forest_regressor_example.py
new file mode 100644
index 000000000000..b59c7c941484
--- /dev/null
+++ b/examples/src/main/python/ml/random_forest_regressor_example.py
@@ -0,0 +1,74 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+"""
+Random Forest Regressor Example.
+"""
+from __future__ import print_function
+
+import sys
+
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.ml import Pipeline
+from pyspark.ml.regression import RandomForestRegressor
+from pyspark.ml.feature import VectorIndexer
+from pyspark.ml.evaluation import RegressionEvaluator
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="random_forest_regressor_example")
+    sqlContext = SQLContext(sc)
+
+    # $example on$
+    # Load and parse the data file, converting it to a DataFrame.
+    data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    # Automatically identify categorical features, and index them.
+    # Set maxCategories so features with > 4 distinct values are treated as continuous.
+    featureIndexer =\
+        VectorIndexer(inputCol="features", outputCol="indexedFeatures", maxCategories=4).fit(data)
+
+    # Split the data into training and test sets (30% held out for testing)
+    (trainingData, testData) = data.randomSplit([0.7, 0.3])
+
+    # Train a RandomForest model.
+    rf = RandomForestRegressor(featuresCol="indexedFeatures")
+
+    # Chain indexer and forest in a Pipeline
+    pipeline = Pipeline(stages=[featureIndexer, rf])
+
+    # Train model.  This also runs the indexer.
+    model = pipeline.fit(trainingData)
+
+    # Make predictions.
+    predictions = model.transform(testData)
+
+    # Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    # Select (prediction, true label) and compute test error
+    evaluator = RegressionEvaluator(
+        labelCol="label", predictionCol="prediction", metricName="rmse")
+    rmse = evaluator.evaluate(predictions)
+    print("Root Mean Squared Error (RMSE) on test data = %g" % rmse)
+
+    rfModel = model.stages[1]
+    print(rfModel)  # summary only
+    # $example off$
+
+    sc.stop()
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeClassifierExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeClassifierExample.scala
new file mode 100644
index 000000000000..474af7db4b49
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeClassifierExample.scala
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.classification.{GBTClassificationModel, GBTClassifier}
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
+import org.apache.spark.ml.feature.{IndexToString, StringIndexer, VectorIndexer}
+// $example off$
+
+object GradientBoostedTreeClassifierExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("GradientBoostedTreeClassifierExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    val labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data)
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a GBT model.
+    val gbt = new GBTClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures")
+      .setMaxIter(10)
+
+    // Convert indexed labels back to original labels.
+    val labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels)
+
+    // Chain indexers and GBT in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(labelIndexer, featureIndexer, gbt, labelConverter))
+
+    // Train model.  This also runs the indexers.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision")
+    val accuracy = evaluator.evaluate(predictions)
+    println("Test Error = " + (1.0 - accuracy))
+
+    val gbtModel = model.stages(2).asInstanceOf[GBTClassificationModel]
+    println("Learned classification GBT model:\n" + gbtModel.toDebugString)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeRegressorExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeRegressorExample.scala
new file mode 100644
index 000000000000..da1cd9c2ce52
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/GradientBoostedTreeRegressorExample.scala
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.evaluation.RegressionEvaluator
+import org.apache.spark.ml.feature.VectorIndexer
+import org.apache.spark.ml.regression.{GBTRegressionModel, GBTRegressor}
+// $example off$
+
+object GradientBoostedTreeRegressorExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("GradientBoostedTreeRegressorExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a GBT model.
+    val gbt = new GBTRegressor()
+      .setLabelCol("label")
+      .setFeaturesCol("indexedFeatures")
+      .setMaxIter(10)
+
+    // Chain indexer and GBT in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(featureIndexer, gbt))
+
+    // Train model.  This also runs the indexer.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse")
+    val rmse = evaluator.evaluate(predictions)
+    println("Root Mean Squared Error (RMSE) on test data = " + rmse)
+
+    val gbtModel = model.stages(1).asInstanceOf[GBTRegressionModel]
+    println("Learned regression GBT model:\n" + gbtModel.toDebugString)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
index 8e4f1b09a24b..b46faea5713f 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/OneVsRestExample.scala
@@ -23,12 +23,14 @@ import java.util.concurrent.TimeUnit.{NANOSECONDS => NANO}
 import scopt.OptionParser
 
 import org.apache.spark.{SparkContext, SparkConf}
+// $example on$
 import org.apache.spark.examples.mllib.AbstractParams
 import org.apache.spark.ml.classification.{OneVsRest, LogisticRegression}
 import org.apache.spark.ml.util.MetadataUtils
 import org.apache.spark.mllib.evaluation.MulticlassMetrics
 import org.apache.spark.mllib.linalg.Vector
 import org.apache.spark.sql.DataFrame
+// $example off$
 import org.apache.spark.sql.SQLContext
 
 /**
@@ -112,6 +114,7 @@ object OneVsRestExample {
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
 
+    // $example on$
     val inputData = sqlContext.read.format("libsvm").load(params.input)
     // compute the train/test split: if testInput is not provided use part of input.
     val data = params.testInput match {
@@ -172,6 +175,7 @@ object OneVsRestExample {
     println("label\tfpr")
 
     println(fprs.map {case (label, fpr) => label + "\t" + fpr}.mkString("\n"))
+    // $example off$
 
     sc.stop()
   }
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestClassifierExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestClassifierExample.scala
new file mode 100644
index 000000000000..e79176ca6ca1
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestClassifierExample.scala
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.classification.{RandomForestClassificationModel, RandomForestClassifier}
+import org.apache.spark.ml.evaluation.MulticlassClassificationEvaluator
+import org.apache.spark.ml.feature.{IndexToString, StringIndexer, VectorIndexer}
+// $example off$
+
+object RandomForestClassifierExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("RandomForestClassifierExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    // Index labels, adding metadata to the label column.
+    // Fit on whole dataset to include all labels in index.
+    val labelIndexer = new StringIndexer()
+      .setInputCol("label")
+      .setOutputCol("indexedLabel")
+      .fit(data)
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a RandomForest model.
+    val rf = new RandomForestClassifier()
+      .setLabelCol("indexedLabel")
+      .setFeaturesCol("indexedFeatures")
+      .setNumTrees(10)
+
+    // Convert indexed labels back to original labels.
+    val labelConverter = new IndexToString()
+      .setInputCol("prediction")
+      .setOutputCol("predictedLabel")
+      .setLabels(labelIndexer.labels)
+
+    // Chain indexers and forest in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(labelIndexer, featureIndexer, rf, labelConverter))
+
+    // Train model.  This also runs the indexers.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("predictedLabel", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new MulticlassClassificationEvaluator()
+      .setLabelCol("indexedLabel")
+      .setPredictionCol("prediction")
+      .setMetricName("precision")
+    val accuracy = evaluator.evaluate(predictions)
+    println("Test Error = " + (1.0 - accuracy))
+
+    val rfModel = model.stages(2).asInstanceOf[RandomForestClassificationModel]
+    println("Learned classification forest model:\n" + rfModel.toDebugString)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestRegressorExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestRegressorExample.scala
new file mode 100644
index 000000000000..acec1437a1af
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/RandomForestRegressorExample.scala
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.ml
+
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+// $example on$
+import org.apache.spark.ml.Pipeline
+import org.apache.spark.ml.evaluation.RegressionEvaluator
+import org.apache.spark.ml.feature.VectorIndexer
+import org.apache.spark.ml.regression.{RandomForestRegressionModel, RandomForestRegressor}
+// $example off$
+
+object RandomForestRegressorExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("RandomForestRegressorExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Load and parse the data file, converting it to a DataFrame.
+    val data = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+
+    // Automatically identify categorical features, and index them.
+    // Set maxCategories so features with > 4 distinct values are treated as continuous.
+    val featureIndexer = new VectorIndexer()
+      .setInputCol("features")
+      .setOutputCol("indexedFeatures")
+      .setMaxCategories(4)
+      .fit(data)
+
+    // Split the data into training and test sets (30% held out for testing)
+    val Array(trainingData, testData) = data.randomSplit(Array(0.7, 0.3))
+
+    // Train a RandomForest model.
+    val rf = new RandomForestRegressor()
+      .setLabelCol("label")
+      .setFeaturesCol("indexedFeatures")
+
+    // Chain indexer and forest in a Pipeline
+    val pipeline = new Pipeline()
+      .setStages(Array(featureIndexer, rf))
+
+    // Train model.  This also runs the indexer.
+    val model = pipeline.fit(trainingData)
+
+    // Make predictions.
+    val predictions = model.transform(testData)
+
+    // Select example rows to display.
+    predictions.select("prediction", "label", "features").show(5)
+
+    // Select (prediction, true label) and compute test error
+    val evaluator = new RegressionEvaluator()
+      .setLabelCol("label")
+      .setPredictionCol("prediction")
+      .setMetricName("rmse")
+    val rmse = evaluator.evaluate(predictions)
+    println("Root Mean Squared Error (RMSE) on test data = " + rmse)
+
+    val rfModel = model.stages(1).asInstanceOf[RandomForestRegressionModel]
+    println("Learned regression forest model:\n" + rfModel.toDebugString)
+    // $example off$
+
+    sc.stop()
+  }
+}
+// scalastyle:on println

From 8019f66df5c65e21d6e4e7e8fbfb7d0471ba3e37 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 17 Nov 2015 23:51:05 -0800
Subject: [PATCH 753/896] [SPARK-10186][SQL][FOLLOW-UP] simplify test

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9783 from cloud-fan/postgre.
---
 .../org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
index 2e18d0a2baa1..6eb6b3391a4a 100644
--- a/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
+++ b/docker-integration-tests/src/test/scala/org/apache/spark/sql/jdbc/PostgresIntegrationSuite.scala
@@ -88,7 +88,7 @@ class PostgresIntegrationSuite extends DockerJDBCIntegrationSuite {
     df.write.jdbc(jdbcUrl, "public.barcopy", new Properties)
     // Test write null values.
     df.select(df.queryExecution.analyzed.output.map { a =>
-      Column(If(Literal(true), Literal(null), a)).as(a.name)
+      Column(Literal.create(null, a.dataType)).as(a.name)
     }: _*).write.jdbc(jdbcUrl, "public.barcopy2", new Properties)
   }
 }

From 5e2b44474c2b838bebeffe5ba5cd72961b0cd31e Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 18 Nov 2015 00:09:29 -0800
Subject: [PATCH 754/896] [SPARK-11802][SQL] Kryo-based encoder for opaque
 types in Datasets

I also found a bug with self-joins returning incorrect results in the Dataset API. Two test cases attached and filed SPARK-11803.

Author: Reynold Xin <rxin@databricks.com>

Closes #9789 from rxin/SPARK-11802.
---
 .../scala/org/apache/spark/sql/Encoder.scala  | 31 +++++++-
 .../catalyst/encoders/ExpressionEncoder.scala |  4 +-
 .../catalyst/encoders/ProductEncoder.scala    |  2 +-
 .../sql/catalyst/expressions/objects.scala    | 69 +++++++++++++++++-
 .../catalyst/encoders/FlatEncoderSuite.scala  | 18 +++++
 .../scala/org/apache/spark/sql/Dataset.scala  |  6 ++
 .../org/apache/spark/sql/GroupedDataset.scala |  1 -
 .../org/apache/spark/sql/DatasetSuite.scala   | 70 +++++++++++++++----
 8 files changed, 178 insertions(+), 23 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index c8b017e25163..79c2255641c0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -17,10 +17,11 @@
 
 package org.apache.spark.sql
 
-import scala.reflect.ClassTag
+import scala.reflect.{ClassTag, classTag}
 
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.catalyst.expressions.{DeserializeWithKryo, BoundReference, SerializeWithKryo}
+import org.apache.spark.sql.types._
 
 /**
  * Used to convert a JVM object of type `T` to and from the internal Spark SQL representation.
@@ -37,7 +38,33 @@ trait Encoder[T] extends Serializable {
   def clsTag: ClassTag[T]
 }
 
+/**
+ * Methods for creating encoders.
+ */
 object Encoders {
+
+  /**
+   * (Scala-specific) Creates an encoder that serializes objects of type T using Kryo.
+   * This encoder maps T into a single byte array (binary) field.
+   */
+  def kryo[T: ClassTag]: Encoder[T] = {
+    val ser = SerializeWithKryo(BoundReference(0, ObjectType(classOf[AnyRef]), nullable = true))
+    val deser = DeserializeWithKryo[T](BoundReference(0, BinaryType, nullable = true), classTag[T])
+    ExpressionEncoder[T](
+      schema = new StructType().add("value", BinaryType),
+      flat = true,
+      toRowExpressions = Seq(ser),
+      fromRowExpression = deser,
+      clsTag = classTag[T]
+    )
+  }
+
+  /**
+   * Creates an encoder that serializes objects of type T using Kryo.
+   * This encoder maps T into a single byte array (binary) field.
+   */
+  def kryo[T](clazz: Class[T]): Encoder[T] = kryo(ClassTag[T](clazz))
+
   def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
   def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
   def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 9a1a8f5cbbdc..b977f278c5b5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -161,7 +161,9 @@ case class ExpressionEncoder[T](
 
   @transient
   private lazy val extractProjection = GenerateUnsafeProjection.generate(toRowExpressions)
-  private val inputRow = new GenericMutableRow(1)
+
+  @transient
+  private lazy val inputRow = new GenericMutableRow(1)
 
   @transient
   private lazy val constructProjection = GenerateSafeProjection.generate(fromRowExpression :: Nil)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
index 414adb21168e..55c4ee11b20f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -230,7 +230,7 @@ object ProductEncoder {
           Invoke(inputObject, "booleanValue", BooleanType)
 
         case other =>
-          throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
+          throw new UnsupportedOperationException(s"Encoder for type $other is not supported")
       }
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 5cd19de68391..489c6126f8cd 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -17,13 +17,15 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
+import scala.language.existentials
+import scala.reflect.ClassTag
+
+import org.apache.spark.SparkConf
+import org.apache.spark.serializer.{KryoSerializerInstance, KryoSerializer}
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
 import org.apache.spark.sql.catalyst.util.GenericArrayData
-
-import scala.language.existentials
-
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.types._
@@ -514,3 +516,64 @@ case class GetInternalRowField(child: Expression, ordinal: Int, dataType: DataTy
     """
   }
 }
+
+/** Serializes an input object using Kryo serializer. */
+case class SerializeWithKryo(child: Expression) extends UnaryExpression {
+
+  override def eval(input: InternalRow): Any =
+    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
+
+  override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val input = child.gen(ctx)
+    val kryo = ctx.freshName("kryoSerializer")
+    val kryoClass = classOf[KryoSerializer].getName
+    val kryoInstanceClass = classOf[KryoSerializerInstance].getName
+    val sparkConfClass = classOf[SparkConf].getName
+    ctx.addMutableState(
+      kryoInstanceClass,
+      kryo,
+      s"$kryo = ($kryoInstanceClass) new $kryoClass(new $sparkConfClass()).newInstance();")
+
+    s"""
+      ${input.code}
+      final boolean ${ev.isNull} = ${input.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      if (!${ev.isNull}) {
+        ${ev.value} = $kryo.serialize(${input.value}, null).array();
+      }
+     """
+  }
+
+  override def dataType: DataType = BinaryType
+}
+
+/**
+ * Deserializes an input object using Kryo serializer. Note that the ClassTag is not an implicit
+ * parameter because TreeNode cannot copy implicit parameters.
+ */
+case class DeserializeWithKryo[T](child: Expression, tag: ClassTag[T]) extends UnaryExpression {
+
+  override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val input = child.gen(ctx)
+    val kryo = ctx.freshName("kryoSerializer")
+    val kryoClass = classOf[KryoSerializer].getName
+    val kryoInstanceClass = classOf[KryoSerializerInstance].getName
+    val sparkConfClass = classOf[SparkConf].getName
+    ctx.addMutableState(
+      kryoInstanceClass,
+      kryo,
+      s"$kryo = ($kryoInstanceClass) new $kryoClass(new $sparkConfClass()).newInstance();")
+
+    s"""
+      ${input.code}
+      final boolean ${ev.isNull} = ${input.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      if (!${ev.isNull}) {
+        ${ev.value} = (${ctx.javaType(dataType)})
+          $kryo.deserialize(java.nio.ByteBuffer.wrap(${input.value}), null);
+      }
+     """
+  }
+
+  override def dataType: DataType = ObjectType(tag.runtimeClass)
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
index 55821c437068..2729db84897a 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.catalyst.encoders
 
 import java.sql.{Date, Timestamp}
+import org.apache.spark.sql.Encoders
 
 class FlatEncoderSuite extends ExpressionEncoderSuite {
   encodeDecodeTest(false, FlatEncoder[Boolean], "primitive boolean")
@@ -71,4 +72,21 @@ class FlatEncoderSuite extends ExpressionEncoderSuite {
   encodeDecodeTest(Map(1 -> "a", 2 -> null), FlatEncoder[Map[Int, String]], "map with null")
   encodeDecodeTest(Map(1 -> Map("a" -> 1), 2 -> Map("b" -> 2)),
     FlatEncoder[Map[Int, Map[String, Int]]], "map of map")
+
+  // Kryo encoders
+  encodeDecodeTest(
+    "hello",
+    Encoders.kryo[String].asInstanceOf[ExpressionEncoder[String]],
+    "kryo string")
+  encodeDecodeTest(
+    new NotJavaSerializable(15),
+    Encoders.kryo[NotJavaSerializable].asInstanceOf[ExpressionEncoder[NotJavaSerializable]],
+    "kryo object serialization")
+}
+
+
+class NotJavaSerializable(val value: Int) {
+  override def equals(other: Any): Boolean = {
+    this.value == other.asInstanceOf[NotJavaSerializable].value
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 718ed812dd64..817c20fdbb9f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -147,6 +147,12 @@ class Dataset[T] private[sql](
     }
   }
 
+  /**
+   * Returns the number of elements in the [[Dataset]].
+   * @since 1.6.0
+   */
+  def count(): Long = toDF().count()
+
   /* *********************** *
    *  Functional Operations  *
    * *********************** */
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 467cd42b9b8d..c66162ee2148 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.sql
 
-
 import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index ea29428c5508..a522894c374f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -24,21 +24,6 @@ import scala.language.postfixOps
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.SharedSQLContext
 
-case class ClassData(a: String, b: Int)
-
-/**
- * A class used to test serialization using encoders. This class throws exceptions when using
- * Java serialization -- so the only way it can be "serialized" is through our encoders.
- */
-case class NonSerializableCaseClass(value: String) extends Externalizable {
-  override def readExternal(in: ObjectInput): Unit = {
-    throw new UnsupportedOperationException
-  }
-
-  override def writeExternal(out: ObjectOutput): Unit = {
-    throw new UnsupportedOperationException
-  }
-}
 
 class DatasetSuite extends QueryTest with SharedSQLContext {
   import testImplicits._
@@ -362,8 +347,63 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     checkAnswer(joined, ("2", 2))
   }
 
+  ignore("self join") {
+    val ds = Seq("1", "2").toDS().as("a")
+    val joined = ds.joinWith(ds, lit(true))
+    checkAnswer(joined, ("1", "1"), ("1", "2"), ("2", "1"), ("2", "2"))
+  }
+
   test("toString") {
     val ds = Seq((1, 2)).toDS()
     assert(ds.toString == "[_1: int, _2: int]")
   }
+
+  test("kryo encoder") {
+    implicit val kryoEncoder = Encoders.kryo[KryoData]
+    val ds = sqlContext.createDataset(Seq(KryoData(1), KryoData(2)))
+
+    assert(ds.groupBy(p => p).count().collect().toSeq ==
+      Seq((KryoData(1), 1L), (KryoData(2), 1L)))
+  }
+
+  ignore("kryo encoder self join") {
+    implicit val kryoEncoder = Encoders.kryo[KryoData]
+    val ds = sqlContext.createDataset(Seq(KryoData(1), KryoData(2)))
+    assert(ds.joinWith(ds, lit(true)).collect().toSet ==
+      Set(
+        (KryoData(1), KryoData(1)),
+        (KryoData(1), KryoData(2)),
+        (KryoData(2), KryoData(1)),
+        (KryoData(2), KryoData(2))))
+  }
+}
+
+
+case class ClassData(a: String, b: Int)
+
+/**
+ * A class used to test serialization using encoders. This class throws exceptions when using
+ * Java serialization -- so the only way it can be "serialized" is through our encoders.
+ */
+case class NonSerializableCaseClass(value: String) extends Externalizable {
+  override def readExternal(in: ObjectInput): Unit = {
+    throw new UnsupportedOperationException
+  }
+
+  override def writeExternal(out: ObjectOutput): Unit = {
+    throw new UnsupportedOperationException
+  }
+}
+
+/** Used to test Kryo encoder. */
+class KryoData(val a: Int) {
+  override def equals(other: Any): Boolean = {
+    a == other.asInstanceOf[KryoData].a
+  }
+  override def hashCode: Int = a
+  override def toString: String = s"KryoData($a)"
+}
+
+object KryoData {
+  def apply(a: Int): KryoData = new KryoData(a)
 }

From 1714350bddd78cd1398e1a816f675ab729001081 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Wed, 18 Nov 2015 00:42:52 -0800
Subject: [PATCH 755/896] [SPARK-11792][SQL] SizeEstimator cannot provide a
 good size estimation of UnsafeHashedRelations

https://issues.apache.org/jira/browse/SPARK-11792

Right now, SizeEstimator will "think" a small UnsafeHashedRelation is several GBs.

Author: Yin Huai <yhuai@databricks.com>

Closes #9788 from yhuai/SPARK-11792.
---
 .../spark/memory/TaskMemoryManager.java       |  3 +++
 .../org/apache/spark/util/SizeEstimator.scala | 26 ++++++++++++++++---
 .../spark/util/SizeEstimatorSuite.scala       | 22 ++++++++++++++++
 .../sql/execution/joins/HashedRelation.scala  | 10 +++++--
 4 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
index 5f743b28857b..d31eb449eb82 100644
--- a/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
+++ b/core/src/main/java/org/apache/spark/memory/TaskMemoryManager.java
@@ -215,6 +215,9 @@ public void showMemoryUsage() {
       logger.info(
         "{} bytes of memory were used by task {} but are not associated with specific consumers",
         memoryNotAccountedFor, taskAttemptId);
+      logger.info(
+        "{} bytes of memory are used for execution and {} bytes of memory are used for storage",
+        memoryManager.executionMemoryUsed(), memoryManager.storageMemoryUsed());
     }
   }
 
diff --git a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
index 23ee4eff0881..c3a2675ee5f4 100644
--- a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
+++ b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
@@ -31,6 +31,16 @@ import org.apache.spark.Logging
 import org.apache.spark.annotation.DeveloperApi
 import org.apache.spark.util.collection.OpenHashSet
 
+/**
+ * A trait that allows a class to give [[SizeEstimator]] more accurate size estimation.
+ * When a class extends it, [[SizeEstimator]] will query the `estimatedSize` first.
+ * If `estimatedSize` does not return [[None]], [[SizeEstimator]] will use the returned size
+ * as the size of the object. Otherwise, [[SizeEstimator]] will do the estimation work.
+ */
+private[spark] trait SizeEstimation {
+  def estimatedSize: Option[Long]
+}
+
 /**
  * :: DeveloperApi ::
  * Estimates the sizes of Java objects (number of bytes of memory they occupy), for use in
@@ -199,10 +209,18 @@ object SizeEstimator extends Logging {
       // the size estimator since it references the whole REPL. Do nothing in this case. In
       // general all ClassLoaders and Classes will be shared between objects anyway.
     } else {
-      val classInfo = getClassInfo(cls)
-      state.size += alignSize(classInfo.shellSize)
-      for (field <- classInfo.pointerFields) {
-        state.enqueue(field.get(obj))
+      val estimatedSize = obj match {
+        case s: SizeEstimation => s.estimatedSize
+        case _ => None
+      }
+      if (estimatedSize.isDefined) {
+        state.size += estimatedSize.get
+      } else {
+        val classInfo = getClassInfo(cls)
+        state.size += alignSize(classInfo.shellSize)
+        for (field <- classInfo.pointerFields) {
+          state.enqueue(field.get(obj))
+        }
       }
     }
   }
diff --git a/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala b/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
index 20550178fb1b..9b6261af123e 100644
--- a/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
@@ -60,6 +60,18 @@ class DummyString(val arr: Array[Char]) {
   @transient val hash32: Int = 0
 }
 
+class DummyClass8 extends SizeEstimation {
+  val x: Int = 0
+
+  override def estimatedSize: Option[Long] = Some(2015)
+}
+
+class DummyClass9 extends SizeEstimation {
+  val x: Int = 0
+
+  override def estimatedSize: Option[Long] = None
+}
+
 class SizeEstimatorSuite
   extends SparkFunSuite
   with BeforeAndAfterEach
@@ -214,4 +226,14 @@ class SizeEstimatorSuite
     // Class should be 32 bytes on s390x if recognised as 64 bit platform
     assertResult(32)(SizeEstimator.estimate(new DummyClass7))
   }
+
+  test("SizeEstimation can provide the estimated size") {
+    // DummyClass8 provides its size estimation.
+    assertResult(2015)(SizeEstimator.estimate(new DummyClass8))
+    assertResult(20206)(SizeEstimator.estimate(Array.fill(10)(new DummyClass8)))
+
+    // DummyClass9 does not provide its size estimation.
+    assertResult(16)(SizeEstimator.estimate(new DummyClass9))
+    assertResult(216)(SizeEstimator.estimate(Array.fill(10)(new DummyClass9)))
+  }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
index cc8abb1ba463..49ae09bf5378 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
@@ -30,7 +30,7 @@ import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetrics}
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.map.BytesToBytesMap
 import org.apache.spark.unsafe.memory.MemoryLocation
-import org.apache.spark.util.Utils
+import org.apache.spark.util.{SizeEstimation, Utils}
 import org.apache.spark.util.collection.CompactBuffer
 import org.apache.spark.{SparkConf, SparkEnv}
 
@@ -189,7 +189,9 @@ private[execution] object HashedRelation {
  */
 private[joins] final class UnsafeHashedRelation(
     private var hashTable: JavaHashMap[UnsafeRow, CompactBuffer[UnsafeRow]])
-  extends HashedRelation with Externalizable {
+  extends HashedRelation
+  with SizeEstimation
+  with Externalizable {
 
   private[joins] def this() = this(null)  // Needed for serialization
 
@@ -215,6 +217,10 @@ private[joins] final class UnsafeHashedRelation(
     }
   }
 
+  override def estimatedSize: Option[Long] = {
+    Option(binaryMap).map(_.getTotalMemoryConsumption)
+  }
+
   override def get(key: InternalRow): Seq[InternalRow] = {
     val unsafeKey = key.asInstanceOf[UnsafeRow]
 

From b8f4379ba1c5c1a8f3b4c88bd97031dc8ad2dfea Mon Sep 17 00:00:00 2001
From: somideshmukh <somilde@us.ibm.com>
Date: Wed, 18 Nov 2015 08:51:01 +0000
Subject: [PATCH 756/896] [SPARK-10946][SQL] JDBC - Use Statement.executeUpdate
 instead of PreparedStatement.executeUpdate for DDLs

New changes with JDBCRDD

Author: somideshmukh <somilde@us.ibm.com>

Closes #9733 from somideshmukh/SomilBranch-1.1.
---
 .../src/main/scala/org/apache/spark/sql/DataFrameWriter.scala   | 2 +-
 .../apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
index e63a4d5e8b10..03867beb7822 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala
@@ -297,7 +297,7 @@ final class DataFrameWriter private[sql](df: DataFrame) {
       if (!tableExists) {
         val schema = JdbcUtils.schemaString(df, url)
         val sql = s"CREATE TABLE $table ($schema)"
-        conn.prepareStatement(sql).executeUpdate()
+        conn.createStatement.executeUpdate(sql)
       }
     } finally {
       conn.close()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
index 32d28e59377a..7375a5c09123 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala
@@ -55,7 +55,7 @@ object JdbcUtils extends Logging {
    * Drops a table from the JDBC database.
    */
   def dropTable(conn: Connection, table: String): Unit = {
-    conn.prepareStatement(s"DROP TABLE $table").executeUpdate()
+    conn.createStatement.executeUpdate(s"DROP TABLE $table")
   }
 
   /**

From e62820c85fe02c70f9ed51b2e68d41ff8cfecd40 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Baptiste=20Onofr=C3=A9?= <jbonofre@apache.org>
Date: Wed, 18 Nov 2015 08:57:58 +0000
Subject: [PATCH 757/896] [SPARK-6541] Sort executors by ID (numeric)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

"Force" the executor ID sort with Int.

Author: Jean-Baptiste Onofré <jbonofre@apache.org>

Closes #9165 from jbonofre/SPARK-6541.
---
 .../org/apache/spark/ui/static/sorttable.js         |  2 +-
 .../org/apache/spark/ui/jobs/ExecutorTable.scala    | 13 +++++++++++--
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/core/src/main/resources/org/apache/spark/ui/static/sorttable.js b/core/src/main/resources/org/apache/spark/ui/static/sorttable.js
index dde6069000bc..a73d9a5cbc21 100644
--- a/core/src/main/resources/org/apache/spark/ui/static/sorttable.js
+++ b/core/src/main/resources/org/apache/spark/ui/static/sorttable.js
@@ -89,7 +89,7 @@ sorttable = {
         // make it clickable to sort
         headrow[i].sorttable_columnindex = i;
         headrow[i].sorttable_tbody = table.tBodies[0];
-        dean_addEvent(headrow[i],"click", function(e) {
+        dean_addEvent(headrow[i],"click", sorttable.innerSortFunction = function(e) {
 
           if (this.className.search(/\bsorttable_sorted\b/) != -1) {
             // if we're already sorted by this column, just 
diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala b/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
index be144f6065ba..1268f44596f8 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/ExecutorTable.scala
@@ -18,7 +18,7 @@
 package org.apache.spark.ui.jobs
 
 import scala.collection.mutable
-import scala.xml.Node
+import scala.xml.{Unparsed, Node}
 
 import org.apache.spark.ui.{ToolTips, UIUtils}
 import org.apache.spark.ui.jobs.UIData.StageUIData
@@ -52,7 +52,7 @@ private[ui] class ExecutorTable(stageId: Int, stageAttemptId: Int, parent: Stage
 
     <table class={UIUtils.TABLE_CLASS_STRIPED_SORTABLE}>
       <thead>
-        <th>Executor ID</th>
+        <th id="executorid">Executor ID</th>
         <th>Address</th>
         <th>Task Time</th>
         <th>Total Tasks</th>
@@ -89,6 +89,15 @@ private[ui] class ExecutorTable(stageId: Int, stageAttemptId: Int, parent: Stage
         {createExecutorTable()}
       </tbody>
     </table>
+    <script>
+      {Unparsed {
+        """
+          |      window.onload = function() {
+          |        sorttable.innerSortFunction.apply(document.getElementById('executorid'), [])
+          |      };
+        """.stripMargin
+      }}
+    </script>
   }
 
   private def createExecutorTable() : Seq[Node] = {

From 9631ca35275b0ce8a5219f975907ac36ed11f528 Mon Sep 17 00:00:00 2001
From: Sean Owen <sowen@cloudera.com>
Date: Wed, 18 Nov 2015 08:59:20 +0000
Subject: [PATCH 758/896] [SPARK-11652][CORE] Remote code execution with
 InvokerTransformer

Update to Commons Collections 3.2.2 to avoid any potential remote code execution vulnerability

Author: Sean Owen <sowen@cloudera.com>

Closes #9731 from srowen/SPARK-11652.
---
 pom.xml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pom.xml b/pom.xml
index 940e2d8740bf..ad849112ce76 100644
--- a/pom.xml
+++ b/pom.xml
@@ -162,6 +162,8 @@
     <!--  commons-httpclient/commons-httpclient-->
     <httpclient.classic.version>3.1</httpclient.classic.version>
     <commons.math3.version>3.4.1</commons.math3.version>
+    <!-- managed up from 3.2.1 for SPARK-11652 -->
+    <commons.collections.version>3.2.2</commons.collections.version>
     <scala.version>2.10.5</scala.version>
     <scala.binary.version>2.10</scala.binary.version>
     <jline.version>${scala.version}</jline.version>
@@ -475,6 +477,11 @@
         <artifactId>commons-math3</artifactId>
         <version>${commons.math3.version}</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.commons</groupId>
+        <artifactId>commons-collections</artifactId>
+        <version>${commons.collections.version}</version>
+      </dependency>
       <dependency>
         <groupId>org.apache.ivy</groupId>
         <artifactId>ivy</artifactId>

From 1429e0a2b562469146b6fa06051c85a00092e5b8 Mon Sep 17 00:00:00 2001
From: Viveka Kulharia <vivkul@iitk.ac.in>
Date: Wed, 18 Nov 2015 09:10:15 +0000
Subject: [PATCH 759/896] rmse was wrongly calculated

It was multiplying with U instaed of dividing by U

Author: Viveka Kulharia <vivkul@iitk.ac.in>

Closes #9771 from vivkul/patch-1.
---
 examples/src/main/python/als.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/src/main/python/als.py b/examples/src/main/python/als.py
index 1c3a787bd0e9..205ca02962be 100755
--- a/examples/src/main/python/als.py
+++ b/examples/src/main/python/als.py
@@ -36,7 +36,7 @@
 
 def rmse(R, ms, us):
     diff = R - ms * us.T
-    return np.sqrt(np.sum(np.power(diff, 2)) / M * U)
+    return np.sqrt(np.sum(np.power(diff, 2)) / (M * U))
 
 
 def update(i, vec, mat, ratings):

From 3a6807fdf07b0e73d76502a6bd91ad979fde8b61 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Wed, 18 Nov 2015 08:18:54 -0800
Subject: [PATCH 760/896] =?UTF-8?q?[SPARK-11804]=20[PYSPARK]=20Exception?=
 =?UTF-8?q?=20raise=20when=20using=20Jdbc=20predicates=20opt=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…ion in PySpark

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9791 from zjffdu/SPARK-11804.
---
 python/pyspark/sql/readwriter.py | 10 +++++-----
 python/pyspark/sql/utils.py      | 13 +++++++++++++
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index 7b8ddb9feba3..e8f0d7ec7703 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -26,6 +26,7 @@
 from pyspark.rdd import ignore_unicode_prefix
 from pyspark.sql.column import _to_seq
 from pyspark.sql.types import *
+from pyspark.sql import utils
 
 __all__ = ["DataFrameReader", "DataFrameWriter"]
 
@@ -131,9 +132,7 @@ def load(self, path=None, format=None, schema=None, **options):
             if type(path) == list:
                 paths = path
                 gateway = self._sqlContext._sc._gateway
-                jpaths = gateway.new_array(gateway.jvm.java.lang.String, len(paths))
-                for i in range(0, len(paths)):
-                    jpaths[i] = paths[i]
+                jpaths = utils.toJArray(gateway, gateway.jvm.java.lang.String, paths)
                 return self._df(self._jreader.load(jpaths))
             else:
                 return self._df(self._jreader.load(path))
@@ -269,8 +268,9 @@ def jdbc(self, url, table, column=None, lowerBound=None, upperBound=None, numPar
             return self._df(self._jreader.jdbc(url, table, column, int(lowerBound), int(upperBound),
                                                int(numPartitions), jprop))
         if predicates is not None:
-            arr = self._sqlContext._sc._jvm.PythonUtils.toArray(predicates)
-            return self._df(self._jreader.jdbc(url, table, arr, jprop))
+            gateway = self._sqlContext._sc._gateway
+            jpredicates = utils.toJArray(gateway, gateway.jvm.java.lang.String, predicates)
+            return self._df(self._jreader.jdbc(url, table, jpredicates, jprop))
         return self._df(self._jreader.jdbc(url, table, jprop))
 
 
diff --git a/python/pyspark/sql/utils.py b/python/pyspark/sql/utils.py
index c4fda8bd3b89..b0a0373372d2 100644
--- a/python/pyspark/sql/utils.py
+++ b/python/pyspark/sql/utils.py
@@ -71,3 +71,16 @@ def install_exception_handler():
     patched = capture_sql_exception(original)
     # only patch the one used in in py4j.java_gateway (call Java API)
     py4j.java_gateway.get_return_value = patched
+
+
+def toJArray(gateway, jtype, arr):
+    """
+    Convert python list to java type array
+    :param gateway: Py4j Gateway
+    :param jtype: java type of element in array
+    :param arr: python type list
+    """
+    jarr = gateway.new_array(jtype, len(arr))
+    for i in range(0, len(arr)):
+        jarr[i] = arr[i]
+    return jarr

From a97d6f3a5861e9f2bbe36957e3b39f835f3e214c Mon Sep 17 00:00:00 2001
From: zero323 <matthew.szymkiewicz@gmail.com>
Date: Wed, 18 Nov 2015 08:32:03 -0800
Subject: [PATCH 761/896] [SPARK-11281][SPARKR] Add tests covering the issue.

The goal of this PR is to add tests covering the issue to ensure that is was resolved by [SPARK-11086](https://issues.apache.org/jira/browse/SPARK-11086).

Author: zero323 <matthew.szymkiewicz@gmail.com>

Closes #9743 from zero323/SPARK-11281-tests.
---
 R/pkg/inst/tests/test_sparkSQL.R | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 8ff06276599e..87ab33f6384b 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -229,7 +229,7 @@ test_that("create DataFrame from list or data.frame", {
   df <- createDataFrame(sqlContext, l, c("a", "b"))
   expect_equal(columns(df), c("a", "b"))
 
-  l <- list(list(a=1, b=2), list(a=3, b=4))
+  l <- list(list(a = 1, b = 2), list(a = 3, b = 4))
   df <- createDataFrame(sqlContext, l)
   expect_equal(columns(df), c("a", "b"))
 
@@ -292,11 +292,15 @@ test_that("create DataFrame with complex types", {
 })
 
 test_that("create DataFrame from a data.frame with complex types", {
-  ldf <- data.frame(row.names=1:2)
+  ldf <- data.frame(row.names = 1:2)
   ldf$a_list <- list(list(1, 2), list(3, 4))
+  ldf$an_envir <- c(as.environment(list(a = 1, b = 2)), as.environment(list(c = 3)))
+
   sdf <- createDataFrame(sqlContext, ldf)
+  collected <- collect(sdf)
 
-  expect_equivalent(ldf, collect(sdf))
+  expect_identical(ldf[, 1, FALSE], collected[, 1, FALSE])
+  expect_equal(ldf$an_envir, collected$an_envir)
 })
 
 # For test map type and struct type in DataFrame

From 224723e6a8b198ef45d6c5ca5d2f9c61188ada8f Mon Sep 17 00:00:00 2001
From: Sun Rui <rui.sun@intel.com>
Date: Wed, 18 Nov 2015 08:41:45 -0800
Subject: [PATCH 762/896] [SPARK-11773][SPARKR] Implement collection functions
 in SparkR.

Author: Sun Rui <rui.sun@intel.com>

Closes #9764 from sun-rui/SPARK-11773.
---
 R/pkg/NAMESPACE                  |   2 +
 R/pkg/R/DataFrame.R              |   2 +-
 R/pkg/R/functions.R              | 109 ++++++++++++++++++++++---------
 R/pkg/R/generics.R               |  10 ++-
 R/pkg/R/utils.R                  |   2 +-
 R/pkg/inst/tests/test_sparkSQL.R |  10 +++
 6 files changed, 100 insertions(+), 35 deletions(-)

diff --git a/R/pkg/NAMESPACE b/R/pkg/NAMESPACE
index 2ee7d6f94f1b..260c9edce62e 100644
--- a/R/pkg/NAMESPACE
+++ b/R/pkg/NAMESPACE
@@ -98,6 +98,7 @@ exportMethods("%in%",
               "add_months",
               "alias",
               "approxCountDistinct",
+              "array_contains",
               "asc",
               "ascii",
               "asin",
@@ -215,6 +216,7 @@ exportMethods("%in%",
               "sinh",
               "size",
               "skewness",
+              "sort_array",
               "soundex",
               "stddev",
               "stddev_pop",
diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index fd105ba5bc9b..34177e3cdd94 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -2198,4 +2198,4 @@ setMethod("coltypes",
             rTypes[naIndices] <- types[naIndices]
 
             rTypes
-          })
\ No newline at end of file
+          })
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index 3d0255a62f15..ff0f438045c1 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -373,22 +373,6 @@ setMethod("exp",
             column(jc)
           })
 
-#' explode
-#'
-#' Creates a new row for each element in the given array or map column.
-#'
-#' @rdname explode
-#' @name explode
-#' @family collection_funcs
-#' @export
-#' @examples \dontrun{explode(df$c)}
-setMethod("explode",
-          signature(x = "Column"),
-          function(x) {
-            jc <- callJStatic("org.apache.spark.sql.functions", "explode", x@jc)
-            column(jc)
-          })
-
 #' expm1
 #'
 #' Computes the exponential of the given value minus one.
@@ -980,22 +964,6 @@ setMethod("sinh",
             column(jc)
           })
 
-#' size
-#'
-#' Returns length of array or map.
-#'
-#' @rdname size
-#' @name size
-#' @family collection_funcs
-#' @export
-#' @examples \dontrun{size(df$c)}
-setMethod("size",
-          signature(x = "Column"),
-          function(x) {
-            jc <- callJStatic("org.apache.spark.sql.functions", "size", x@jc)
-            column(jc)
-          })
-
 #' skewness
 #'
 #' Aggregate function: returns the skewness of the values in a group.
@@ -2365,3 +2333,80 @@ setMethod("rowNumber",
             jc <- callJStatic("org.apache.spark.sql.functions", "rowNumber")
             column(jc)
           })
+
+###################### Collection functions######################
+
+#' array_contains
+#'
+#' Returns true if the array contain the value.
+#'
+#' @param x A Column
+#' @param value A value to be checked if contained in the column
+#' @rdname array_contains
+#' @name array_contains
+#' @family collection_funcs
+#' @export
+#' @examples \dontrun{array_contains(df$c, 1)}
+setMethod("array_contains",
+          signature(x = "Column", value = "ANY"),
+          function(x, value) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "array_contains", x@jc, value)
+            column(jc)
+          })
+
+#' explode
+#'
+#' Creates a new row for each element in the given array or map column.
+#'
+#' @rdname explode
+#' @name explode
+#' @family collection_funcs
+#' @export
+#' @examples \dontrun{explode(df$c)}
+setMethod("explode",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "explode", x@jc)
+            column(jc)
+          })
+
+#' size
+#'
+#' Returns length of array or map.
+#'
+#' @rdname size
+#' @name size
+#' @family collection_funcs
+#' @export
+#' @examples \dontrun{size(df$c)}
+setMethod("size",
+          signature(x = "Column"),
+          function(x) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "size", x@jc)
+            column(jc)
+          })
+
+#' sort_array
+#'
+#' Sorts the input array for the given column in ascending order,
+#' according to the natural ordering of the array elements.
+#'
+#' @param x A Column to sort
+#' @param asc A logical flag indicating the sorting order.
+#'            TRUE, sorting is in ascending order.
+#'            FALSE, sorting is in descending order.
+#' @rdname sort_array
+#' @name sort_array
+#' @family collection_funcs
+#' @export
+#' @examples
+#' \dontrun{
+#' sort_array(df$c)
+#' sort_array(df$c, FALSE)
+#' }
+setMethod("sort_array",
+          signature(x = "Column"),
+          function(x, asc = TRUE) {
+            jc <- callJStatic("org.apache.spark.sql.functions", "sort_array", x@jc, asc)
+            column(jc)
+          })
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index afdeffc2abd8..0dcd05438222 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -644,6 +644,10 @@ setGeneric("add_months", function(y, x) { standardGeneric("add_months") })
 #' @export
 setGeneric("approxCountDistinct", function(x, ...) { standardGeneric("approxCountDistinct") })
 
+#' @rdname array_contains
+#' @export
+setGeneric("array_contains", function(x, value) { standardGeneric("array_contains") })
+
 #' @rdname ascii
 #' @export
 setGeneric("ascii", function(x) { standardGeneric("ascii") })
@@ -961,6 +965,10 @@ setGeneric("size", function(x) { standardGeneric("size") })
 #' @export
 setGeneric("skewness", function(x) { standardGeneric("skewness") })
 
+#' @rdname sort_array
+#' @export
+setGeneric("sort_array", function(x, asc = TRUE) { standardGeneric("sort_array") })
+
 #' @rdname soundex
 #' @export
 setGeneric("soundex", function(x) { standardGeneric("soundex") })
@@ -1076,4 +1084,4 @@ setGeneric("with")
 
 #' @rdname coltypes
 #' @export
-setGeneric("coltypes", function(x) { standardGeneric("coltypes") })
\ No newline at end of file
+setGeneric("coltypes", function(x) { standardGeneric("coltypes") })
diff --git a/R/pkg/R/utils.R b/R/pkg/R/utils.R
index db3b2c4bbd79..45c77a86c958 100644
--- a/R/pkg/R/utils.R
+++ b/R/pkg/R/utils.R
@@ -635,4 +635,4 @@ assignNewEnv <- function(data) {
     assign(x = cols[i], value = data[, cols[i]], envir = env)
   }
   env
-}
\ No newline at end of file
+}
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index 87ab33f6384b..d9a94faff7ac 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -878,6 +878,16 @@ test_that("column functions", {
 
   df4 <- createDataFrame(sqlContext, list(list(a = "010101")))
   expect_equal(collect(select(df4, conv(df4$a, 2, 16)))[1, 1], "15")
+
+  # Test array_contains() and sort_array()
+  df <- createDataFrame(sqlContext, list(list(list(1L, 2L, 3L)), list(list(6L, 5L, 4L))))
+  result <- collect(select(df, array_contains(df[[1]], 1L)))[[1]]
+  expect_equal(result, c(TRUE, FALSE))
+
+  result <- collect(select(df, sort_array(df[[1]], FALSE)))[[1]]
+  expect_equal(result, list(list(3L, 2L, 1L), list(6L, 5L, 4L)))
+  result <- collect(select(df, sort_array(df[[1]])))[[1]]
+  expect_equal(result, list(list(1L, 2L, 3L), list(4L, 5L, 6L)))
 })
 #
 test_that("column binary mathfunctions", {

From 3cca5ffb3d60d5de9a54bc71cf0b8279898936d2 Mon Sep 17 00:00:00 2001
From: Hurshal Patel <hpatel516@gmail.com>
Date: Wed, 18 Nov 2015 09:28:59 -0800
Subject: [PATCH 763/896] [SPARK-11195][CORE] Use correct classloader for
 TaskResultGetter

Make sure we are using the context classloader when deserializing failed TaskResults instead of the Spark classloader.

The issue is that `enqueueFailedTask` was using the incorrect classloader which results in `ClassNotFoundException`.

Adds a test in TaskResultGetterSuite that compiles a custom exception, throws it on the executor, and asserts that Spark handles the TaskResult deserialization instead of returning `UnknownReason`.

See #9367 for previous comments
See SPARK-11195 for a full repro

Author: Hurshal Patel <hpatel516@gmail.com>

Closes #9779 from choochootrain/spark-11195-master.
---
 .../scala/org/apache/spark/TestUtils.scala    | 11 ++--
 .../spark/scheduler/TaskResultGetter.scala    |  4 +-
 .../scheduler/TaskResultGetterSuite.scala     | 65 ++++++++++++++++++-
 3 files changed, 72 insertions(+), 8 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/TestUtils.scala b/core/src/main/scala/org/apache/spark/TestUtils.scala
index acfe751f6c74..43c89b258f2f 100644
--- a/core/src/main/scala/org/apache/spark/TestUtils.scala
+++ b/core/src/main/scala/org/apache/spark/TestUtils.scala
@@ -20,6 +20,7 @@ package org.apache.spark
 import java.io.{ByteArrayInputStream, File, FileInputStream, FileOutputStream}
 import java.net.{URI, URL}
 import java.nio.charset.StandardCharsets
+import java.nio.file.Paths
 import java.util.Arrays
 import java.util.jar.{JarEntry, JarOutputStream}
 
@@ -83,15 +84,15 @@ private[spark] object TestUtils {
   }
 
   /**
-   * Create a jar file that contains this set of files. All files will be located at the root
-   * of the jar.
+   * Create a jar file that contains this set of files. All files will be located in the specified
+   * directory or at the root of the jar.
    */
-  def createJar(files: Seq[File], jarFile: File): URL = {
+  def createJar(files: Seq[File], jarFile: File, directoryPrefix: Option[String] = None): URL = {
     val jarFileStream = new FileOutputStream(jarFile)
     val jarStream = new JarOutputStream(jarFileStream, new java.util.jar.Manifest())
 
     for (file <- files) {
-      val jarEntry = new JarEntry(file.getName)
+      val jarEntry = new JarEntry(Paths.get(directoryPrefix.getOrElse(""), file.getName).toString)
       jarStream.putNextEntry(jarEntry)
 
       val in = new FileInputStream(file)
@@ -123,7 +124,7 @@ private[spark] object TestUtils {
       classpathUrls: Seq[URL]): File = {
     val compiler = ToolProvider.getSystemJavaCompiler
 
-    // Calling this outputs a class file in pwd. It's easier to just rename the file than
+    // Calling this outputs a class file in pwd. It's easier to just rename the files than
     // build a custom FileManager that controls the output location.
     val options = if (classpathUrls.nonEmpty) {
       Seq("-classpath", classpathUrls.map { _.getFile }.mkString(File.pathSeparator))
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskResultGetter.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskResultGetter.scala
index 46a6f6537e2e..f4965994d827 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskResultGetter.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskResultGetter.scala
@@ -103,16 +103,16 @@ private[spark] class TaskResultGetter(sparkEnv: SparkEnv, scheduler: TaskSchedul
     try {
       getTaskResultExecutor.execute(new Runnable {
         override def run(): Unit = Utils.logUncaughtExceptions {
+          val loader = Utils.getContextOrSparkClassLoader
           try {
             if (serializedData != null && serializedData.limit() > 0) {
               reason = serializer.get().deserialize[TaskEndReason](
-                serializedData, Utils.getSparkClassLoader)
+                serializedData, loader)
             }
           } catch {
             case cnd: ClassNotFoundException =>
               // Log an error but keep going here -- the task failed, so not catastrophic
               // if we can't deserialize the reason.
-              val loader = Utils.getContextOrSparkClassLoader
               logError(
                 "Could not deserialize TaskEndReason: ClassNotFound with classloader " + loader)
             case ex: Exception => {}
diff --git a/core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala
index 815caa79ff52..bc72c3685e8c 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/TaskResultGetterSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.scheduler
 
+import java.io.File
+import java.net.URL
 import java.nio.ByteBuffer
 
 import scala.concurrent.duration._
@@ -26,8 +28,10 @@ import scala.util.control.NonFatal
 import org.scalatest.BeforeAndAfter
 import org.scalatest.concurrent.Eventually._
 
-import org.apache.spark.{LocalSparkContext, SparkConf, SparkContext, SparkEnv, SparkFunSuite}
+import org.apache.spark._
 import org.apache.spark.storage.TaskResultBlockId
+import org.apache.spark.TestUtils.JavaSourceFromString
+import org.apache.spark.util.{MutableURLClassLoader, Utils}
 
 /**
  * Removes the TaskResult from the BlockManager before delegating to a normal TaskResultGetter.
@@ -119,5 +123,64 @@ class TaskResultGetterSuite extends SparkFunSuite with BeforeAndAfter with Local
     // Make sure two tasks were run (one failed one, and a second retried one).
     assert(scheduler.nextTaskId.get() === 2)
   }
+
+  /**
+   * Make sure we are using the context classloader when deserializing failed TaskResults instead
+   * of the Spark classloader.
+
+   * This test compiles a jar containing an exception and tests that when it is thrown on the
+   * executor, enqueueFailedTask can correctly deserialize the failure and identify the thrown
+   * exception as the cause.
+
+   * Before this fix, enqueueFailedTask would throw a ClassNotFoundException when deserializing
+   * the exception, resulting in an UnknownReason for the TaskEndResult.
+   */
+  test("failed task deserialized with the correct classloader (SPARK-11195)") {
+    // compile a small jar containing an exception that will be thrown on an executor.
+    val tempDir = Utils.createTempDir()
+    val srcDir = new File(tempDir, "repro/")
+    srcDir.mkdirs()
+    val excSource = new JavaSourceFromString(new File(srcDir, "MyException").getAbsolutePath,
+      """package repro;
+        |
+        |public class MyException extends Exception {
+        |}
+      """.stripMargin)
+    val excFile = TestUtils.createCompiledClass("MyException", srcDir, excSource, Seq.empty)
+    val jarFile = new File(tempDir, "testJar-%s.jar".format(System.currentTimeMillis()))
+    TestUtils.createJar(Seq(excFile), jarFile, directoryPrefix = Some("repro"))
+
+    // ensure we reset the classloader after the test completes
+    val originalClassLoader = Thread.currentThread.getContextClassLoader
+    try {
+      // load the exception from the jar
+      val loader = new MutableURLClassLoader(new Array[URL](0), originalClassLoader)
+      loader.addURL(jarFile.toURI.toURL)
+      Thread.currentThread().setContextClassLoader(loader)
+      val excClass: Class[_] = Utils.classForName("repro.MyException")
+
+      // NOTE: we must run the cluster with "local" so that the executor can load the compiled
+      // jar.
+      sc = new SparkContext("local", "test", conf)
+      val rdd = sc.parallelize(Seq(1), 1).map { _ =>
+        val exc = excClass.newInstance().asInstanceOf[Exception]
+        throw exc
+      }
+
+      // the driver should not have any problems resolving the exception class and determining
+      // why the task failed.
+      val exceptionMessage = intercept[SparkException] {
+        rdd.collect()
+      }.getMessage
+
+      val expectedFailure = """(?s).*Lost task.*: repro.MyException.*""".r
+      val unknownFailure = """(?s).*Lost task.*: UnknownReason.*""".r
+
+      assert(expectedFailure.findFirstMatchIn(exceptionMessage).isDefined)
+      assert(unknownFailure.findFirstMatchIn(exceptionMessage).isEmpty)
+    } finally {
+      Thread.currentThread.setContextClassLoader(originalClassLoader)
+    }
+  }
 }
 

From cffb899c4397ecccedbcc41e7cf3da91f953435a Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 18 Nov 2015 10:15:50 -0800
Subject: [PATCH 764/896] [SPARK-11803][SQL] fix Dataset self-join

When we resolve the join operator, we may change the output of right side if self-join is detected. So in `Dataset.joinWith`, we should resolve the join operator first, and then get the left output and right output from it, instead of using `left.output` and `right.output` directly.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9806 from cloud-fan/self-join.
---
 .../main/scala/org/apache/spark/sql/Dataset.scala  | 14 +++++++++-----
 .../scala/org/apache/spark/sql/DatasetSuite.scala  |  8 ++++----
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 817c20fdbb9f..b644f6ad3096 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -498,13 +498,17 @@ class Dataset[T] private[sql](
     val left = this.logicalPlan
     val right = other.logicalPlan
 
+    val joined = sqlContext.executePlan(Join(left, right, Inner, Some(condition.expr)))
+    val leftOutput = joined.analyzed.output.take(left.output.length)
+    val rightOutput = joined.analyzed.output.takeRight(right.output.length)
+
     val leftData = this.unresolvedTEncoder match {
-      case e if e.flat => Alias(left.output.head, "_1")()
-      case _ => Alias(CreateStruct(left.output), "_1")()
+      case e if e.flat => Alias(leftOutput.head, "_1")()
+      case _ => Alias(CreateStruct(leftOutput), "_1")()
     }
     val rightData = other.unresolvedTEncoder match {
-      case e if e.flat => Alias(right.output.head, "_2")()
-      case _ => Alias(CreateStruct(right.output), "_2")()
+      case e if e.flat => Alias(rightOutput.head, "_2")()
+      case _ => Alias(CreateStruct(rightOutput), "_2")()
     }
 
 
@@ -513,7 +517,7 @@ class Dataset[T] private[sql](
     withPlan[(T, U)](other) { (left, right) =>
       Project(
         leftData :: rightData :: Nil,
-        Join(left, right, Inner, Some(condition.expr)))
+        joined.analyzed)
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index a522894c374f..198962b8fb75 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -347,7 +347,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     checkAnswer(joined, ("2", 2))
   }
 
-  ignore("self join") {
+  test("self join") {
     val ds = Seq("1", "2").toDS().as("a")
     val joined = ds.joinWith(ds, lit(true))
     checkAnswer(joined, ("1", "1"), ("1", "2"), ("2", "1"), ("2", "2"))
@@ -360,15 +360,15 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
   test("kryo encoder") {
     implicit val kryoEncoder = Encoders.kryo[KryoData]
-    val ds = sqlContext.createDataset(Seq(KryoData(1), KryoData(2)))
+    val ds = Seq(KryoData(1), KryoData(2)).toDS()
 
     assert(ds.groupBy(p => p).count().collect().toSeq ==
       Seq((KryoData(1), 1L), (KryoData(2), 1L)))
   }
 
-  ignore("kryo encoder self join") {
+  test("kryo encoder self join") {
     implicit val kryoEncoder = Encoders.kryo[KryoData]
-    val ds = sqlContext.createDataset(Seq(KryoData(1), KryoData(2)))
+    val ds = Seq(KryoData(1), KryoData(2)).toDS()
     assert(ds.joinWith(ds, lit(true)).collect().toSet ==
       Set(
         (KryoData(1), KryoData(1)),

From 33b837333435ceb0c04d1f361a5383c4fe6a5a75 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 18 Nov 2015 10:23:12 -0800
Subject: [PATCH 765/896] [SPARK-11725][SQL] correctly handle null inputs for
 UDF

If user use primitive parameters in UDF, there is no way for him to do the null-check for primitive inputs, so we are assuming the primitive input is null-propagatable for this case and return null if the input is null.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9770 from cloud-fan/udf.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |  9 ++++
 .../sql/catalyst/analysis/Analyzer.scala      | 32 +++++++++++++-
 .../sql/catalyst/expressions/ScalaUDF.scala   |  6 +++
 .../sql/catalyst/ScalaReflectionSuite.scala   | 17 +++++++
 .../sql/catalyst/analysis/AnalysisSuite.scala | 44 +++++++++++++++++++
 .../org/apache/spark/sql/DataFrameSuite.scala | 14 ++++++
 6 files changed, 121 insertions(+), 1 deletion(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 0b3dd351e38e..38828e59a215 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -719,6 +719,15 @@ trait ScalaReflection {
     }
   }
 
+  /**
+   * Returns classes of input parameters of scala function object.
+   */
+  def getParameterTypes(func: AnyRef): Seq[Class[_]] = {
+    val methods = func.getClass.getMethods.filter(m => m.getName == "apply" && !m.isBridge)
+    assert(methods.length == 1)
+    methods.head.getParameterTypes
+  }
+
   def typeOfObject: PartialFunction[Any, DataType] = {
     // The data type can be determined without ambiguity.
     case obj: Boolean => BooleanType
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 2f4670b55bdb..f00c451b5981 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -25,7 +25,7 @@ import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.rules._
 import org.apache.spark.sql.catalyst.trees.TreeNodeRef
-import org.apache.spark.sql.catalyst.{SimpleCatalystConf, CatalystConf}
+import org.apache.spark.sql.catalyst.{ScalaReflection, SimpleCatalystConf, CatalystConf}
 import org.apache.spark.sql.types._
 
 /**
@@ -85,6 +85,8 @@ class Analyzer(
       extendedResolutionRules : _*),
     Batch("Nondeterministic", Once,
       PullOutNondeterministic),
+    Batch("UDF", Once,
+      HandleNullInputsForUDF),
     Batch("Cleanup", fixedPoint,
       CleanupAliases)
   )
@@ -1063,6 +1065,34 @@ class Analyzer(
         Project(p.output, newPlan.withNewChildren(newChild :: Nil))
     }
   }
+
+  /**
+   * Correctly handle null primitive inputs for UDF by adding extra [[If]] expression to do the
+   * null check.  When user defines a UDF with primitive parameters, there is no way to tell if the
+   * primitive parameter is null or not, so here we assume the primitive input is null-propagatable
+   * and we should return null if the input is null.
+   */
+  object HandleNullInputsForUDF extends Rule[LogicalPlan] {
+    override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
+      case p if !p.resolved => p // Skip unresolved nodes.
+
+      case plan => plan transformExpressionsUp {
+
+        case udf @ ScalaUDF(func, _, inputs, _) =>
+          val parameterTypes = ScalaReflection.getParameterTypes(func)
+          assert(parameterTypes.length == inputs.length)
+
+          val inputsNullCheck = parameterTypes.zip(inputs)
+            // TODO: skip null handling for not-nullable primitive inputs after we can completely
+            // trust the `nullable` information.
+            // .filter { case (cls, expr) => cls.isPrimitive && expr.nullable }
+            .filter { case (cls, _) => cls.isPrimitive }
+            .map { case (_, expr) => IsNull(expr) }
+            .reduceLeftOption[Expression]((e1, e2) => Or(e1, e2))
+          inputsNullCheck.map(If(_, Literal.create(null, udf.dataType), udf)).getOrElse(udf)
+      }
+    }
+  }
 }
 
 /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
index 3388cc20a980..03b89221ef2d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/ScalaUDF.scala
@@ -24,7 +24,13 @@ import org.apache.spark.sql.types.DataType
 
 /**
  * User-defined function.
+ * @param function  The user defined scala function to run.
+ *                  Note that if you use primitive parameters, you are not able to check if it is
+ *                  null or not, and the UDF will return null for you if the primitive input is
+ *                  null. Use boxed type or [[Option]] if you wanna do the null-handling yourself.
  * @param dataType  Return type of function.
+ * @param children  The input expressions of this UDF.
+ * @param inputTypes  The expected input types of this UDF.
  */
 case class ScalaUDF(
     function: AnyRef,
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
index 3b848cfdf737..4ea410d492b0 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
@@ -280,4 +280,21 @@ class ScalaReflectionSuite extends SparkFunSuite {
         assert(s.fields.map(_.dataType) === Seq(IntegerType, StringType, DoubleType))
     }
   }
+
+  test("get parameter type from a function object") {
+    val primitiveFunc = (i: Int, j: Long) => "x"
+    val primitiveTypes = getParameterTypes(primitiveFunc)
+    assert(primitiveTypes.forall(_.isPrimitive))
+    assert(primitiveTypes === Seq(classOf[Int], classOf[Long]))
+
+    val boxedFunc = (i: java.lang.Integer, j: java.lang.Long) => "x"
+    val boxedTypes = getParameterTypes(boxedFunc)
+    assert(boxedTypes.forall(!_.isPrimitive))
+    assert(boxedTypes === Seq(classOf[java.lang.Integer], classOf[java.lang.Long]))
+
+    val anyFunc = (i: Any, j: AnyRef) => "x"
+    val anyTypes = getParameterTypes(anyFunc)
+    assert(anyTypes.forall(!_.isPrimitive))
+    assert(anyTypes === Seq(classOf[java.lang.Object], classOf[java.lang.Object]))
+  }
 }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 65f09b46afae..08586a97411a 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -174,4 +174,48 @@ class AnalysisSuite extends AnalysisTest {
     )
     assertAnalysisError(plan, Seq("data type mismatch: Arguments must be same type"))
   }
+
+  test("SPARK-11725: correctly handle null inputs for ScalaUDF") {
+    val string = testRelation2.output(0)
+    val double = testRelation2.output(2)
+    val short = testRelation2.output(4)
+    val nullResult = Literal.create(null, StringType)
+
+    def checkUDF(udf: Expression, transformed: Expression): Unit = {
+      checkAnalysis(
+        Project(Alias(udf, "")() :: Nil, testRelation2),
+        Project(Alias(transformed, "")() :: Nil, testRelation2)
+      )
+    }
+
+    // non-primitive parameters do not need special null handling
+    val udf1 = ScalaUDF((s: String) => "x", StringType, string :: Nil)
+    val expected1 = udf1
+    checkUDF(udf1, expected1)
+
+    // only primitive parameter needs special null handling
+    val udf2 = ScalaUDF((s: String, d: Double) => "x", StringType, string :: double :: Nil)
+    val expected2 = If(IsNull(double), nullResult, udf2)
+    checkUDF(udf2, expected2)
+
+    // special null handling should apply to all primitive parameters
+    val udf3 = ScalaUDF((s: Short, d: Double) => "x", StringType, short :: double :: Nil)
+    val expected3 = If(
+      IsNull(short) || IsNull(double),
+      nullResult,
+      udf3)
+    checkUDF(udf3, expected3)
+
+    // we can skip special null handling for primitive parameters that are not nullable
+    // TODO: this is disabled for now as we can not completely trust `nullable`.
+    val udf4 = ScalaUDF(
+      (s: Short, d: Double) => "x",
+      StringType,
+      short :: double.withNullability(false) :: Nil)
+    val expected4 = If(
+      IsNull(short),
+      nullResult,
+      udf4)
+    // checkUDF(udf4, expected4)
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 35cdab50bdec..5a7f24684d1b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -1115,4 +1115,18 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     checkAnswer(df.select(df("*")), Row(1, "a"))
     checkAnswer(df.withColumnRenamed("d^'a.", "a"), Row(1, "a"))
   }
+
+  test("SPARK-11725: correctly handle null inputs for ScalaUDF") {
+    val df = Seq(
+      new java.lang.Integer(22) -> "John",
+      null.asInstanceOf[java.lang.Integer] -> "Lucy").toDF("age", "name")
+
+    val boxedUDF = udf[java.lang.Integer, java.lang.Integer] {
+      (i: java.lang.Integer) => if (i == null) null else i * 2
+    }
+    checkAnswer(df.select(boxedUDF($"age")), Row(44) :: Row(null) :: Nil)
+
+    val primitiveUDF = udf((i: Int) => i * 2)
+    checkAnswer(df.select(primitiveUDF($"age")), Row(44) :: Row(null) :: Nil)
+  }
 }

From dbf428c87ab34b6f76c75946043bdf5f60c9b1b3 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Wed, 18 Nov 2015 10:33:17 -0800
Subject: [PATCH 766/896] [SPARK-11795][SQL] combine grouping attributes into a
 single NamedExpression
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

we use `ExpressionEncoder.tuple` to build the result encoder, which assumes the input encoder should point to a struct type field if it’s non-flat.
However, our keyEncoder always point to a flat field/fields: `groupingAttributes`, we should combine them into a single `NamedExpression`.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9792 from cloud-fan/agg.
---
 .../main/scala/org/apache/spark/sql/GroupedDataset.scala | 9 +++++++--
 .../test/scala/org/apache/spark/sql/DatasetSuite.scala   | 5 ++---
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index c66162ee2148..3f84e22a1025 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -22,7 +22,7 @@ import scala.collection.JavaConverters._
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function._
 import org.apache.spark.sql.catalyst.encoders.{FlatEncoder, ExpressionEncoder, encoderFor}
-import org.apache.spark.sql.catalyst.expressions.Attribute
+import org.apache.spark.sql.catalyst.expressions.{Alias, CreateStruct, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
 
@@ -187,7 +187,12 @@ class GroupedDataset[K, T] private[sql](
     val namedColumns =
       columns.map(
         _.withInputType(resolvedTEncoder, dataAttributes).named)
-    val aggregate = Aggregate(groupingAttributes, groupingAttributes ++ namedColumns, logicalPlan)
+    val keyColumn = if (groupingAttributes.length > 1) {
+      Alias(CreateStruct(groupingAttributes), "key")()
+    } else {
+      groupingAttributes.head
+    }
+    val aggregate = Aggregate(groupingAttributes, keyColumn +: namedColumns, logicalPlan)
     val execution = new QueryExecution(sqlContext, aggregate)
 
     new Dataset(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 198962b8fb75..b6db583dfe01 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -84,8 +84,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       ("a", 2), ("b", 3), ("c", 4))
   }
 
-  ignore("Dataset should set the resolved encoders internally for maps") {
-    // TODO: Enable this once we fix SPARK-11793.
+  test("map and group by with class data") {
     // We inject a group by here to make sure this test case is future proof
     // when we implement better pipelining and local execution mode.
     val ds: Dataset[(ClassData, Long)] = Seq(ClassData("one", 1), ClassData("two", 2)).toDS()
@@ -94,7 +93,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
     checkAnswer(
       ds,
-      (ClassData("one", 1), 1L), (ClassData("two", 2), 1L))
+      (ClassData("one", 2), 1L), (ClassData("two", 3), 1L))
   }
 
   test("select") {

From 90a7519daaa7f4ee3be7c5a9aa244120811ff6eb Mon Sep 17 00:00:00 2001
From: Jakob Odersky <jodersky@gmail.com>
Date: Wed, 18 Nov 2015 11:35:41 -0800
Subject: [PATCH 767/896] [MINOR][BUILD] Ignore ensime cache

Using ENSIME, I often have `.ensime_cache` polluting my source tree. This PR simply adds the cache directory to `.gitignore`

Author: Jakob Odersky <jodersky@gmail.com>

Closes #9708 from jodersky/master.
---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 08f2d8f7543f..07524bc429e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,6 +50,7 @@ spark-tests.log
 streaming-tests.log
 dependency-reduced-pom.xml
 .ensime
+.ensime_cache/
 .ensime_lucene
 checkpoint
 derby.log

From 6f99522d13d8db9fcc767f7c3189557b9a53d283 Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Wed, 18 Nov 2015 11:49:12 -0800
Subject: [PATCH 768/896] [SPARK-11792] [SQL] [FOLLOW-UP] Change SizeEstimation
 to KnownSizeEstimation and make estimatedSize return Long instead of
 Option[Long]

https://issues.apache.org/jira/browse/SPARK-11792

The main changes include:
* Renaming `SizeEstimation` to `KnownSizeEstimation`. Hopefully this new name has more information.
* Making `estimatedSize` return `Long` instead of `Option[Long]`.
* In `UnsaveHashedRelation`, `estimatedSize` will delegate the work to `SizeEstimator` if we have not created a `BytesToBytesMap`.

Since we will put `UnsaveHashedRelation` to `BlockManager`, it is generally good to let it provide a more accurate size estimation. Also, if we do not put `BytesToBytesMap` directly into `BlockerManager`, I feel it is not really necessary to make `BytesToBytesMap` extends `KnownSizeEstimation`.

Author: Yin Huai <yhuai@databricks.com>

Closes #9813 from yhuai/SPARK-11792-followup.
---
 .../org/apache/spark/util/SizeEstimator.scala | 30 ++++++++++---------
 .../spark/util/SizeEstimatorSuite.scala       | 14 ++-------
 .../sql/execution/joins/HashedRelation.scala  | 12 +++++---
 3 files changed, 26 insertions(+), 30 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
index c3a2675ee5f4..09864e3f8392 100644
--- a/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
+++ b/core/src/main/scala/org/apache/spark/util/SizeEstimator.scala
@@ -36,9 +36,14 @@ import org.apache.spark.util.collection.OpenHashSet
  * When a class extends it, [[SizeEstimator]] will query the `estimatedSize` first.
  * If `estimatedSize` does not return [[None]], [[SizeEstimator]] will use the returned size
  * as the size of the object. Otherwise, [[SizeEstimator]] will do the estimation work.
+ * The difference between a [[KnownSizeEstimation]] and
+ * [[org.apache.spark.util.collection.SizeTracker]] is that, a
+ * [[org.apache.spark.util.collection.SizeTracker]] still uses [[SizeEstimator]] to
+ * estimate the size. However, a [[KnownSizeEstimation]] can provide a better estimation without
+ * using [[SizeEstimator]].
  */
-private[spark] trait SizeEstimation {
-  def estimatedSize: Option[Long]
+private[spark] trait KnownSizeEstimation {
+  def estimatedSize: Long
 }
 
 /**
@@ -209,18 +214,15 @@ object SizeEstimator extends Logging {
       // the size estimator since it references the whole REPL. Do nothing in this case. In
       // general all ClassLoaders and Classes will be shared between objects anyway.
     } else {
-      val estimatedSize = obj match {
-        case s: SizeEstimation => s.estimatedSize
-        case _ => None
-      }
-      if (estimatedSize.isDefined) {
-        state.size += estimatedSize.get
-      } else {
-        val classInfo = getClassInfo(cls)
-        state.size += alignSize(classInfo.shellSize)
-        for (field <- classInfo.pointerFields) {
-          state.enqueue(field.get(obj))
-        }
+      obj match {
+        case s: KnownSizeEstimation =>
+          state.size += s.estimatedSize
+        case _ =>
+          val classInfo = getClassInfo(cls)
+          state.size += alignSize(classInfo.shellSize)
+          for (field <- classInfo.pointerFields) {
+            state.enqueue(field.get(obj))
+          }
       }
     }
   }
diff --git a/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala b/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
index 9b6261af123e..101610e38014 100644
--- a/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/SizeEstimatorSuite.scala
@@ -60,16 +60,10 @@ class DummyString(val arr: Array[Char]) {
   @transient val hash32: Int = 0
 }
 
-class DummyClass8 extends SizeEstimation {
+class DummyClass8 extends KnownSizeEstimation {
   val x: Int = 0
 
-  override def estimatedSize: Option[Long] = Some(2015)
-}
-
-class DummyClass9 extends SizeEstimation {
-  val x: Int = 0
-
-  override def estimatedSize: Option[Long] = None
+  override def estimatedSize: Long = 2015
 }
 
 class SizeEstimatorSuite
@@ -231,9 +225,5 @@ class SizeEstimatorSuite
     // DummyClass8 provides its size estimation.
     assertResult(2015)(SizeEstimator.estimate(new DummyClass8))
     assertResult(20206)(SizeEstimator.estimate(Array.fill(10)(new DummyClass8)))
-
-    // DummyClass9 does not provide its size estimation.
-    assertResult(16)(SizeEstimator.estimate(new DummyClass9))
-    assertResult(216)(SizeEstimator.estimate(Array.fill(10)(new DummyClass9)))
   }
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
index 49ae09bf5378..aebfea583240 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
@@ -30,7 +30,7 @@ import org.apache.spark.sql.execution.metric.{LongSQLMetric, SQLMetrics}
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.map.BytesToBytesMap
 import org.apache.spark.unsafe.memory.MemoryLocation
-import org.apache.spark.util.{SizeEstimation, Utils}
+import org.apache.spark.util.{SizeEstimator, KnownSizeEstimation, Utils}
 import org.apache.spark.util.collection.CompactBuffer
 import org.apache.spark.{SparkConf, SparkEnv}
 
@@ -190,7 +190,7 @@ private[execution] object HashedRelation {
 private[joins] final class UnsafeHashedRelation(
     private var hashTable: JavaHashMap[UnsafeRow, CompactBuffer[UnsafeRow]])
   extends HashedRelation
-  with SizeEstimation
+  with KnownSizeEstimation
   with Externalizable {
 
   private[joins] def this() = this(null)  // Needed for serialization
@@ -217,8 +217,12 @@ private[joins] final class UnsafeHashedRelation(
     }
   }
 
-  override def estimatedSize: Option[Long] = {
-    Option(binaryMap).map(_.getTotalMemoryConsumption)
+  override def estimatedSize: Long = {
+    if (binaryMap != null) {
+      binaryMap.getTotalMemoryConsumption
+    } else {
+      SizeEstimator.estimate(hashTable)
+    }
   }
 
   override def get(key: InternalRow): Seq[InternalRow] = {

From 94624eacb0fdbbe210894151a956f8150cdf527e Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Wed, 18 Nov 2015 11:53:28 -0800
Subject: [PATCH 769/896] [SPARK-11739][SQL] clear the instantiated SQLContext

Currently, if the first SQLContext is not removed after stopping SparkContext, a SQLContext could set there forever. This patch make this more robust.

Author: Davies Liu <davies@databricks.com>

Closes #9706 from davies/clear_context.
---
 .../scala/org/apache/spark/sql/SQLContext.scala | 17 +++++++++++------
 .../spark/sql/MultiSQLContextsSuite.scala       |  5 ++---
 .../execution/ExchangeCoordinatorSuite.scala    |  2 +-
 3 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index cd1fdc4edb39..39471d2fb79a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -1229,7 +1229,7 @@ class SQLContext private[sql](
   // construction of the instance.
   sparkContext.addSparkListener(new SparkListener {
     override def onApplicationEnd(applicationEnd: SparkListenerApplicationEnd): Unit = {
-      SQLContext.clearInstantiatedContext(self)
+      SQLContext.clearInstantiatedContext()
     }
   })
 
@@ -1270,13 +1270,13 @@ object SQLContext {
    */
   def getOrCreate(sparkContext: SparkContext): SQLContext = {
     val ctx = activeContext.get()
-    if (ctx != null) {
+    if (ctx != null && !ctx.sparkContext.isStopped) {
       return ctx
     }
 
     synchronized {
       val ctx = instantiatedContext.get()
-      if (ctx == null) {
+      if (ctx == null || ctx.sparkContext.isStopped) {
         new SQLContext(sparkContext)
       } else {
         ctx
@@ -1284,12 +1284,17 @@ object SQLContext {
     }
   }
 
-  private[sql] def clearInstantiatedContext(sqlContext: SQLContext): Unit = {
-    instantiatedContext.compareAndSet(sqlContext, null)
+  private[sql] def clearInstantiatedContext(): Unit = {
+    instantiatedContext.set(null)
   }
 
   private[sql] def setInstantiatedContext(sqlContext: SQLContext): Unit = {
-    instantiatedContext.compareAndSet(null, sqlContext)
+    synchronized {
+      val ctx = instantiatedContext.get()
+      if (ctx == null || ctx.sparkContext.isStopped) {
+        instantiatedContext.set(sqlContext)
+      }
+    }
   }
 
   private[sql] def getInstantiatedContextOption(): Option[SQLContext] = {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala
index 0e8fcb6a858b..34c5c68fd1c1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/MultiSQLContextsSuite.scala
@@ -31,7 +31,7 @@ class MultiSQLContextsSuite extends SparkFunSuite with BeforeAndAfterAll {
     originalInstantiatedSQLContext = SQLContext.getInstantiatedContextOption()
 
     SQLContext.clearActive()
-    originalInstantiatedSQLContext.foreach(ctx => SQLContext.clearInstantiatedContext(ctx))
+    SQLContext.clearInstantiatedContext()
     sparkConf =
       new SparkConf(false)
         .setMaster("local[*]")
@@ -89,10 +89,9 @@ class MultiSQLContextsSuite extends SparkFunSuite with BeforeAndAfterAll {
         testNewSession(rootSQLContext)
         testNewSession(rootSQLContext)
         testCreatingNewSQLContext(allowMultipleSQLContexts)
-
-        SQLContext.clearInstantiatedContext(rootSQLContext)
       } finally {
         sc.stop()
+        SQLContext.clearInstantiatedContext()
       }
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
index 25f2f5caeed1..b96d50a70b85 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/ExchangeCoordinatorSuite.scala
@@ -34,7 +34,7 @@ class ExchangeCoordinatorSuite extends SparkFunSuite with BeforeAndAfterAll {
     originalInstantiatedSQLContext = SQLContext.getInstantiatedContextOption()
 
     SQLContext.clearActive()
-    originalInstantiatedSQLContext.foreach(ctx => SQLContext.clearInstantiatedContext(ctx))
+    SQLContext.clearInstantiatedContext()
   }
 
   override protected def afterAll(): Unit = {

From 31921e0f0bd559d042148d1ea32f865fb3068f38 Mon Sep 17 00:00:00 2001
From: Bryan Cutler <bjcutler@us.ibm.com>
Date: Wed, 18 Nov 2015 12:09:54 -0800
Subject: [PATCH 770/896] [SPARK-4557][STREAMING] Spark Streaming foreachRDD
 Java API method should accept a VoidFunction<...>

Currently streaming foreachRDD Java API uses a function prototype requiring a return value of null.  This PR deprecates the old method and uses VoidFunction to allow for more concise declaration.  Also added VoidFunction2 to Java API in order to use in Streaming methods.  Unit test is added for using foreachRDD with VoidFunction, and changes have been tested with Java 7 and Java 8 using lambdas.

Author: Bryan Cutler <bjcutler@us.ibm.com>

Closes #9488 from BryanCutler/foreachRDD-VoidFunction-SPARK-4557.
---
 .../api/java/function/VoidFunction2.java      | 27 ++++++++++++
 .../apache/spark/streaming/Java8APISuite.java | 26 ++++++++++++
 project/MimaExcludes.scala                    |  4 ++
 .../streaming/api/java/JavaDStreamLike.scala  | 24 ++++++++++-
 .../apache/spark/streaming/JavaAPISuite.java  | 41 ++++++++++++++++++-
 5 files changed, 120 insertions(+), 2 deletions(-)
 create mode 100644 core/src/main/java/org/apache/spark/api/java/function/VoidFunction2.java

diff --git a/core/src/main/java/org/apache/spark/api/java/function/VoidFunction2.java b/core/src/main/java/org/apache/spark/api/java/function/VoidFunction2.java
new file mode 100644
index 000000000000..6c576ab67845
--- /dev/null
+++ b/core/src/main/java/org/apache/spark/api/java/function/VoidFunction2.java
@@ -0,0 +1,27 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.api.java.function;
+
+import java.io.Serializable;
+
+/**
+ * A two-argument function that takes arguments of type T1 and T2 with no return value.
+ */
+public interface VoidFunction2<T1, T2> extends Serializable {
+  public void call(T1 v1, T2 v2) throws Exception;
+}
diff --git a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
index 163ae92c12c6..4eee97bc8961 100644
--- a/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
+++ b/extras/java8-tests/src/test/java/org/apache/spark/streaming/Java8APISuite.java
@@ -28,6 +28,7 @@
 import org.junit.Assert;
 import org.junit.Test;
 
+import org.apache.spark.Accumulator;
 import org.apache.spark.HashPartitioner;
 import org.apache.spark.api.java.JavaPairRDD;
 import org.apache.spark.api.java.JavaRDD;
@@ -360,6 +361,31 @@ public void testFlatMap() {
     assertOrderInvariantEquals(expected, result);
   }
 
+  @Test
+  public void testForeachRDD() {
+    final Accumulator<Integer> accumRdd = ssc.sc().accumulator(0);
+    final Accumulator<Integer> accumEle = ssc.sc().accumulator(0);
+    List<List<Integer>> inputData = Arrays.asList(
+        Arrays.asList(1,1,1),
+        Arrays.asList(1,1,1));
+
+    JavaDStream<Integer> stream = JavaTestUtils.attachTestInputStream(ssc, inputData, 1);
+    JavaTestUtils.attachTestOutputStream(stream.count()); // dummy output
+
+    stream.foreachRDD(rdd -> {
+      accumRdd.add(1);
+      rdd.foreach(x -> accumEle.add(1));
+    });
+
+    // This is a test to make sure foreachRDD(VoidFunction2) can be called from Java
+    stream.foreachRDD((rdd, time) -> null);
+
+    JavaTestUtils.runStreams(ssc, 2, 2);
+
+    Assert.assertEquals(2, accumRdd.value().intValue());
+    Assert.assertEquals(6, accumEle.value().intValue());
+  }
+
   @Test
   public void testPairFlatMap() {
     List<List<String>> inputData = Arrays.asList(
diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index eb70d27c34c2..bb45d1bb1214 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -142,6 +142,10 @@ object MimaExcludes {
           "org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper.createDirectStream"),
         ProblemFilters.exclude[MissingMethodProblem](
           "org.apache.spark.streaming.kafka.KafkaUtilsPythonHelper.createRDD")
+      ) ++ Seq(
+        // SPARK-4557 Changed foreachRDD to use VoidFunction
+        ProblemFilters.exclude[MissingMethodProblem](
+          "org.apache.spark.streaming.api.java.JavaDStreamLike.foreachRDD")
       )
     case v if v.startsWith("1.5") =>
       Seq(
diff --git a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaDStreamLike.scala b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaDStreamLike.scala
index edfa474677f1..84acec7d8e33 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaDStreamLike.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/api/java/JavaDStreamLike.scala
@@ -27,7 +27,7 @@ import scala.reflect.ClassTag
 import org.apache.spark.api.java.{JavaPairRDD, JavaRDD, JavaRDDLike}
 import org.apache.spark.api.java.JavaPairRDD._
 import org.apache.spark.api.java.JavaSparkContext.fakeClassTag
-import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2, Function3 => JFunction3, _}
+import org.apache.spark.api.java.function.{Function => JFunction, Function2 => JFunction2, Function3 => JFunction3, VoidFunction => JVoidFunction, VoidFunction2 => JVoidFunction2, _}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.streaming._
 import org.apache.spark.streaming.api.java.JavaDStream._
@@ -308,7 +308,10 @@ trait JavaDStreamLike[T, This <: JavaDStreamLike[T, This, R], R <: JavaRDDLike[T
   /**
    * Apply a function to each RDD in this DStream. This is an output operator, so
    * 'this' DStream will be registered as an output stream and therefore materialized.
+   *
+   * @deprecated  As of release 1.6.0, replaced by foreachRDD(JVoidFunction)
    */
+  @deprecated("Use foreachRDD(foreachFunc: JVoidFunction[R])", "1.6.0")
   def foreachRDD(foreachFunc: JFunction[R, Void]) {
     dstream.foreachRDD(rdd => foreachFunc.call(wrapRDD(rdd)))
   }
@@ -316,11 +319,30 @@ trait JavaDStreamLike[T, This <: JavaDStreamLike[T, This, R], R <: JavaRDDLike[T
   /**
    * Apply a function to each RDD in this DStream. This is an output operator, so
    * 'this' DStream will be registered as an output stream and therefore materialized.
+   *
+   * @deprecated  As of release 1.6.0, replaced by foreachRDD(JVoidFunction2)
    */
+  @deprecated("Use foreachRDD(foreachFunc: JVoidFunction2[R, Time])", "1.6.0")
   def foreachRDD(foreachFunc: JFunction2[R, Time, Void]) {
     dstream.foreachRDD((rdd, time) => foreachFunc.call(wrapRDD(rdd), time))
   }
 
+  /**
+   * Apply a function to each RDD in this DStream. This is an output operator, so
+   * 'this' DStream will be registered as an output stream and therefore materialized.
+   */
+  def foreachRDD(foreachFunc: JVoidFunction[R]) {
+    dstream.foreachRDD(rdd => foreachFunc.call(wrapRDD(rdd)))
+  }
+
+  /**
+   * Apply a function to each RDD in this DStream. This is an output operator, so
+   * 'this' DStream will be registered as an output stream and therefore materialized.
+   */
+  def foreachRDD(foreachFunc: JVoidFunction2[R, Time]) {
+    dstream.foreachRDD((rdd, time) => foreachFunc.call(wrapRDD(rdd), time))
+  }
+
   /**
    * Return a new DStream in which each RDD is generated by applying a function
    * on each RDD of 'this' DStream.
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaAPISuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaAPISuite.java
index c5217149224e..609bb4413b6b 100644
--- a/streaming/src/test/java/org/apache/spark/streaming/JavaAPISuite.java
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaAPISuite.java
@@ -37,7 +37,9 @@
 import com.google.common.io.Files;
 import com.google.common.collect.Sets;
 
+import org.apache.spark.Accumulator;
 import org.apache.spark.HashPartitioner;
+import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.JavaPairRDD;
 import org.apache.spark.api.java.JavaRDD;
 import org.apache.spark.api.java.JavaSparkContext;
@@ -45,7 +47,6 @@
 import org.apache.spark.storage.StorageLevel;
 import org.apache.spark.streaming.api.java.*;
 import org.apache.spark.util.Utils;
-import org.apache.spark.SparkConf;
 
 // The test suite itself is Serializable so that anonymous Function implementations can be
 // serialized, as an alternative to converting these anonymous classes to static inner classes;
@@ -768,6 +769,44 @@ public Iterable<String> call(String x) {
     assertOrderInvariantEquals(expected, result);
   }
 
+  @SuppressWarnings("unchecked")
+  @Test
+  public void testForeachRDD() {
+    final Accumulator<Integer> accumRdd = ssc.sc().accumulator(0);
+    final Accumulator<Integer> accumEle = ssc.sc().accumulator(0);
+    List<List<Integer>> inputData = Arrays.asList(
+        Arrays.asList(1,1,1),
+        Arrays.asList(1,1,1));
+
+    JavaDStream<Integer> stream = JavaTestUtils.attachTestInputStream(ssc, inputData, 1);
+    JavaTestUtils.attachTestOutputStream(stream.count()); // dummy output
+
+    stream.foreachRDD(new VoidFunction<JavaRDD<Integer>>() {
+      @Override
+      public void call(JavaRDD<Integer> rdd) {
+        accumRdd.add(1);
+        rdd.foreach(new VoidFunction<Integer>() {
+          @Override
+          public void call(Integer i) {
+            accumEle.add(1);
+          }
+        });
+      }
+    });
+
+    // This is a test to make sure foreachRDD(VoidFunction2) can be called from Java
+    stream.foreachRDD(new VoidFunction2<JavaRDD<Integer>, Time>() {
+      @Override
+      public void call(JavaRDD<Integer> rdd, Time time) {
+      }
+    });
+
+    JavaTestUtils.runStreams(ssc, 2, 2);
+
+    Assert.assertEquals(2, accumRdd.value().intValue());
+    Assert.assertEquals(6, accumEle.value().intValue());
+  }
+
   @SuppressWarnings("unchecked")
   @Test
   public void testPairFlatMap() {

From a416e41e285700f861559d710dbf857405bfddf6 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 18 Nov 2015 12:50:29 -0800
Subject: [PATCH 771/896] [SPARK-11809] Switch the default Mesos mode to
 coarse-grained mode

Based on my conversions with people, I believe the consensus is that the coarse-grained mode is more stable and easier to reason about. It is best to use that as the default rather than the more flaky fine-grained mode.

Author: Reynold Xin <rxin@databricks.com>

Closes #9795 from rxin/SPARK-11809.
---
 .../scala/org/apache/spark/SparkContext.scala |  2 +-
 docs/job-scheduling.md                        |  2 +-
 docs/running-on-mesos.md                      | 27 ++++++++++++-------
 3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index b5645b08f92d..ab374cb71286 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -2710,7 +2710,7 @@ object SparkContext extends Logging {
       case mesosUrl @ MESOS_REGEX(_) =>
         MesosNativeLibrary.load()
         val scheduler = new TaskSchedulerImpl(sc)
-        val coarseGrained = sc.conf.getBoolean("spark.mesos.coarse", false)
+        val coarseGrained = sc.conf.getBoolean("spark.mesos.coarse", defaultValue = true)
         val url = mesosUrl.stripPrefix("mesos://") // strip scheme from raw Mesos URLs
         val backend = if (coarseGrained) {
           new CoarseMesosSchedulerBackend(scheduler, sc, url, sc.env.securityManager)
diff --git a/docs/job-scheduling.md b/docs/job-scheduling.md
index a3c34cb6796f..36327c6efeaf 100644
--- a/docs/job-scheduling.md
+++ b/docs/job-scheduling.md
@@ -47,7 +47,7 @@ application is not running tasks on a machine, other applications may run tasks
 is useful when you expect large numbers of not overly active applications, such as shell sessions from
 separate users. However, it comes with a risk of less predictable latency, because it may take a while for
 an application to gain back cores on one node when it has work to do. To use this mode, simply use a
-`mesos://` URL without setting `spark.mesos.coarse` to true.
+`mesos://` URL and set `spark.mesos.coarse` to false.
 
 Note that none of the modes currently provide memory sharing across applications. If you would like to share
 data this way, we recommend running a single server application that can serve multiple requests by querying
diff --git a/docs/running-on-mesos.md b/docs/running-on-mesos.md
index 5be208cf3461..a197d0e37302 100644
--- a/docs/running-on-mesos.md
+++ b/docs/running-on-mesos.md
@@ -161,21 +161,15 @@ Note that jars or python files that are passed to spark-submit should be URIs re
 
 # Mesos Run Modes
 
-Spark can run over Mesos in two modes: "fine-grained" (default) and "coarse-grained".
+Spark can run over Mesos in two modes: "coarse-grained" (default) and "fine-grained".
 
-In "fine-grained" mode (default), each Spark task runs as a separate Mesos task. This allows
-multiple instances of Spark (and other frameworks) to share machines at a very fine granularity,
-where each application gets more or fewer machines as it ramps up and down, but it comes with an
-additional overhead in launching each task. This mode may be inappropriate for low-latency
-requirements like interactive queries or serving web requests.
-
-The "coarse-grained" mode will instead launch only *one* long-running Spark task on each Mesos
+The "coarse-grained" mode will launch only *one* long-running Spark task on each Mesos
 machine, and dynamically schedule its own "mini-tasks" within it. The benefit is much lower startup
 overhead, but at the cost of reserving the Mesos resources for the complete duration of the
 application.
 
-To run in coarse-grained mode, set the `spark.mesos.coarse` property in your
-[SparkConf](configuration.html#spark-properties):
+Coarse-grained is the default mode. You can also set `spark.mesos.coarse` property to true
+to turn it on explictly in [SparkConf](configuration.html#spark-properties):
 
 {% highlight scala %}
 conf.set("spark.mesos.coarse", "true")
@@ -186,6 +180,19 @@ acquire. By default, it will acquire *all* cores in the cluster (that get offere
 only makes sense if you run just one application at a time. You can cap the maximum number of cores
 using `conf.set("spark.cores.max", "10")` (for example).
 
+In "fine-grained" mode, each Spark task runs as a separate Mesos task. This allows
+multiple instances of Spark (and other frameworks) to share machines at a very fine granularity,
+where each application gets more or fewer machines as it ramps up and down, but it comes with an
+additional overhead in launching each task. This mode may be inappropriate for low-latency
+requirements like interactive queries or serving web requests.
+
+To run in coarse-grained mode, set the `spark.mesos.coarse` property to false in your
+[SparkConf](configuration.html#spark-properties):
+
+{% highlight scala %}
+conf.set("spark.mesos.coarse", "false")
+{% endhighlight %}
+
 You may also make use of `spark.mesos.constraints` to set attribute based constraints on mesos resource offers. By default, all resource offers will be accepted.
 
 {% highlight scala %}

From 7c5b641808740ba5eed05ba8204cdbaf3fc579f5 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Wed, 18 Nov 2015 12:53:22 -0800
Subject: [PATCH 772/896] [SPARK-10745][CORE] Separate configs between shuffle
 and RPC

[SPARK-6028](https://issues.apache.org/jira/browse/SPARK-6028) uses network module to implement RPC. However, there are some configurations named with `spark.shuffle` prefix in the network module.

This PR refactors them to make sure the user can control them in shuffle and RPC separately. The user can use `spark.rpc.*` to set the configuration for netty RPC.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9481 from zsxwing/SPARK-10745.
---
 .../spark/deploy/ExternalShuffleService.scala |  3 +-
 .../netty/NettyBlockTransferService.scala     |  2 +-
 .../network/netty/SparkTransportConf.scala    | 12 ++--
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  |  8 +--
 .../mesos/CoarseMesosSchedulerBackend.scala   |  2 +-
 .../shuffle/FileShuffleBlockResolver.scala    |  2 +-
 .../shuffle/IndexShuffleBlockResolver.scala   |  2 +-
 .../apache/spark/storage/BlockManager.scala   |  2 +-
 .../spark/ExternalShuffleServiceSuite.scala   |  2 +-
 .../spark/network/util/TransportConf.java     | 65 ++++++++++++++-----
 .../network/ChunkFetchIntegrationSuite.java   |  2 +-
 .../RequestTimeoutIntegrationSuite.java       |  2 +-
 .../spark/network/RpcIntegrationSuite.java    |  2 +-
 .../org/apache/spark/network/StreamSuite.java |  2 +-
 .../network/TransportClientFactorySuite.java  |  6 +-
 .../spark/network/sasl/SparkSaslSuite.java    |  6 +-
 .../network/sasl/SaslIntegrationSuite.java    |  2 +-
 .../ExternalShuffleBlockResolverSuite.java    |  2 +-
 .../shuffle/ExternalShuffleCleanupSuite.java  |  2 +-
 .../ExternalShuffleIntegrationSuite.java      |  2 +-
 .../shuffle/ExternalShuffleSecuritySuite.java |  2 +-
 .../shuffle/RetryingBlockFetcherSuite.java    |  2 +-
 .../network/yarn/YarnShuffleService.java      |  2 +-
 23 files changed, 84 insertions(+), 50 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala b/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
index a039d543c35e..e8a1e35c3fc4 100644
--- a/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
+++ b/core/src/main/scala/org/apache/spark/deploy/ExternalShuffleService.scala
@@ -45,7 +45,8 @@ class ExternalShuffleService(sparkConf: SparkConf, securityManager: SecurityMana
   private val port = sparkConf.getInt("spark.shuffle.service.port", 7337)
   private val useSasl: Boolean = securityManager.isAuthenticationEnabled()
 
-  private val transportConf = SparkTransportConf.fromSparkConf(sparkConf, numUsableCores = 0)
+  private val transportConf =
+    SparkTransportConf.fromSparkConf(sparkConf, "shuffle", numUsableCores = 0)
   private val blockHandler = newShuffleBlockHandler(transportConf)
   private val transportContext: TransportContext =
     new TransportContext(transportConf, blockHandler, true)
diff --git a/core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala b/core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala
index 70a42f9045e6..b0694e3c6c8a 100644
--- a/core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala
+++ b/core/src/main/scala/org/apache/spark/network/netty/NettyBlockTransferService.scala
@@ -41,7 +41,7 @@ class NettyBlockTransferService(conf: SparkConf, securityManager: SecurityManage
   // TODO: Don't use Java serialization, use a more cross-version compatible serialization format.
   private val serializer = new JavaSerializer(conf)
   private val authEnabled = securityManager.isAuthenticationEnabled()
-  private val transportConf = SparkTransportConf.fromSparkConf(conf, numCores)
+  private val transportConf = SparkTransportConf.fromSparkConf(conf, "shuffle", numCores)
 
   private[this] var transportContext: TransportContext = _
   private[this] var server: TransportServer = _
diff --git a/core/src/main/scala/org/apache/spark/network/netty/SparkTransportConf.scala b/core/src/main/scala/org/apache/spark/network/netty/SparkTransportConf.scala
index cef203006d68..84833f59d7af 100644
--- a/core/src/main/scala/org/apache/spark/network/netty/SparkTransportConf.scala
+++ b/core/src/main/scala/org/apache/spark/network/netty/SparkTransportConf.scala
@@ -40,23 +40,23 @@ object SparkTransportConf {
 
   /**
    * Utility for creating a [[TransportConf]] from a [[SparkConf]].
+   * @param _conf the [[SparkConf]]
+   * @param module the module name
    * @param numUsableCores if nonzero, this will restrict the server and client threads to only
    *                       use the given number of cores, rather than all of the machine's cores.
    *                       This restriction will only occur if these properties are not already set.
    */
-  def fromSparkConf(_conf: SparkConf, numUsableCores: Int = 0): TransportConf = {
+  def fromSparkConf(_conf: SparkConf, module: String, numUsableCores: Int = 0): TransportConf = {
     val conf = _conf.clone
 
     // Specify thread configuration based on our JVM's allocation of cores (rather than necessarily
     // assuming we have all the machine's cores).
     // NB: Only set if serverThreads/clientThreads not already set.
     val numThreads = defaultNumThreads(numUsableCores)
-    conf.set("spark.shuffle.io.serverThreads",
-      conf.get("spark.shuffle.io.serverThreads", numThreads.toString))
-    conf.set("spark.shuffle.io.clientThreads",
-      conf.get("spark.shuffle.io.clientThreads", numThreads.toString))
+    conf.setIfMissing(s"spark.$module.io.serverThreads", numThreads.toString)
+    conf.setIfMissing(s"spark.$module.io.clientThreads", numThreads.toString)
 
-    new TransportConf(new ConfigProvider {
+    new TransportConf(module, new ConfigProvider {
       override def get(name: String): String = conf.get(name)
     })
   }
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 09093819bb22..3e0c49796950 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -22,16 +22,13 @@ import java.net.{InetSocketAddress, URI}
 import java.nio.ByteBuffer
 import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicBoolean
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.GuardedBy
+import javax.annotation.Nullable
 
-import scala.collection.mutable
 import scala.concurrent.{Future, Promise}
 import scala.reflect.ClassTag
 import scala.util.{DynamicVariable, Failure, Success}
 import scala.util.control.NonFatal
 
-import com.google.common.base.Preconditions
 import org.apache.spark.{Logging, SecurityManager, SparkConf}
 import org.apache.spark.network.TransportContext
 import org.apache.spark.network.client._
@@ -49,7 +46,8 @@ private[netty] class NettyRpcEnv(
     securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
 
   private val transportConf = SparkTransportConf.fromSparkConf(
-    conf.clone.set("spark.shuffle.io.numConnectionsPerPeer", "1"),
+    conf.clone.set("spark.rpc.io.numConnectionsPerPeer", "1"),
+    "rpc",
     conf.getInt("spark.rpc.io.threads", 0))
 
   private val dispatcher: Dispatcher = new Dispatcher(this)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
index 2de9b6a65169..7d08eae0b487 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala
@@ -109,7 +109,7 @@ private[spark] class CoarseMesosSchedulerBackend(
   private val mesosExternalShuffleClient: Option[MesosExternalShuffleClient] = {
     if (shuffleServiceEnabled) {
       Some(new MesosExternalShuffleClient(
-        SparkTransportConf.fromSparkConf(conf),
+        SparkTransportConf.fromSparkConf(conf, "shuffle"),
         securityManager,
         securityManager.isAuthenticationEnabled(),
         securityManager.isSaslEncryptionEnabled()))
diff --git a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
index 39fadd878351..cc5f933393ad 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/FileShuffleBlockResolver.scala
@@ -46,7 +46,7 @@ private[spark] trait ShuffleWriterGroup {
 private[spark] class FileShuffleBlockResolver(conf: SparkConf)
   extends ShuffleBlockResolver with Logging {
 
-  private val transportConf = SparkTransportConf.fromSparkConf(conf)
+  private val transportConf = SparkTransportConf.fromSparkConf(conf, "shuffle")
 
   private lazy val blockManager = SparkEnv.get.blockManager
 
diff --git a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
index 05b1eed7f3be..fadb8fe7ed0a 100644
--- a/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
+++ b/core/src/main/scala/org/apache/spark/shuffle/IndexShuffleBlockResolver.scala
@@ -47,7 +47,7 @@ private[spark] class IndexShuffleBlockResolver(
 
   private lazy val blockManager = Option(_blockManager).getOrElse(SparkEnv.get.blockManager)
 
-  private val transportConf = SparkTransportConf.fromSparkConf(conf)
+  private val transportConf = SparkTransportConf.fromSparkConf(conf, "shuffle")
 
   def getDataFile(shuffleId: Int, mapId: Int): File = {
     blockManager.diskBlockManager.getFile(ShuffleDataBlockId(shuffleId, mapId, NOOP_REDUCE_ID))
diff --git a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
index 661c706af32b..ab0007fb7899 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockManager.scala
@@ -122,7 +122,7 @@ private[spark] class BlockManager(
   // Client to read other executors' shuffle files. This is either an external service, or just the
   // standard BlockTransferService to directly connect to other Executors.
   private[spark] val shuffleClient = if (externalShuffleServiceEnabled) {
-    val transConf = SparkTransportConf.fromSparkConf(conf, numUsableCores)
+    val transConf = SparkTransportConf.fromSparkConf(conf, "shuffle", numUsableCores)
     new ExternalShuffleClient(transConf, securityManager, securityManager.isAuthenticationEnabled(),
       securityManager.isSaslEncryptionEnabled())
   } else {
diff --git a/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala b/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
index 231f4631e0a4..1c775bcb3d9c 100644
--- a/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ExternalShuffleServiceSuite.scala
@@ -35,7 +35,7 @@ class ExternalShuffleServiceSuite extends ShuffleSuite with BeforeAndAfterAll {
   var rpcHandler: ExternalShuffleBlockHandler = _
 
   override def beforeAll() {
-    val transportConf = SparkTransportConf.fromSparkConf(conf, numUsableCores = 2)
+    val transportConf = SparkTransportConf.fromSparkConf(conf, "shuffle", numUsableCores = 2)
     rpcHandler = new ExternalShuffleBlockHandler(transportConf, null)
     val transportContext = new TransportContext(transportConf, rpcHandler)
     server = transportContext.createServer()
diff --git a/network/common/src/main/java/org/apache/spark/network/util/TransportConf.java b/network/common/src/main/java/org/apache/spark/network/util/TransportConf.java
index 3b2eff377955..115135d44adb 100644
--- a/network/common/src/main/java/org/apache/spark/network/util/TransportConf.java
+++ b/network/common/src/main/java/org/apache/spark/network/util/TransportConf.java
@@ -23,18 +23,53 @@
  * A central location that tracks all the settings we expose to users.
  */
 public class TransportConf {
+
+  private final String SPARK_NETWORK_IO_MODE_KEY;
+  private final String SPARK_NETWORK_IO_PREFERDIRECTBUFS_KEY;
+  private final String SPARK_NETWORK_IO_CONNECTIONTIMEOUT_KEY;
+  private final String SPARK_NETWORK_IO_BACKLOG_KEY;
+  private final String SPARK_NETWORK_IO_NUMCONNECTIONSPERPEER_KEY;
+  private final String SPARK_NETWORK_IO_SERVERTHREADS_KEY;
+  private final String SPARK_NETWORK_IO_CLIENTTHREADS_KEY;
+  private final String SPARK_NETWORK_IO_RECEIVEBUFFER_KEY;
+  private final String SPARK_NETWORK_IO_SENDBUFFER_KEY;
+  private final String SPARK_NETWORK_SASL_TIMEOUT_KEY;
+  private final String SPARK_NETWORK_IO_MAXRETRIES_KEY;
+  private final String SPARK_NETWORK_IO_RETRYWAIT_KEY;
+  private final String SPARK_NETWORK_IO_LAZYFD_KEY;
+
   private final ConfigProvider conf;
 
-  public TransportConf(ConfigProvider conf) {
+  private final String module;
+
+  public TransportConf(String module, ConfigProvider conf) {
+    this.module = module;
     this.conf = conf;
+    SPARK_NETWORK_IO_MODE_KEY = getConfKey("io.mode");
+    SPARK_NETWORK_IO_PREFERDIRECTBUFS_KEY = getConfKey("io.preferDirectBufs");
+    SPARK_NETWORK_IO_CONNECTIONTIMEOUT_KEY = getConfKey("io.connectionTimeout");
+    SPARK_NETWORK_IO_BACKLOG_KEY = getConfKey("io.backLog");
+    SPARK_NETWORK_IO_NUMCONNECTIONSPERPEER_KEY =  getConfKey("io.numConnectionsPerPeer");
+    SPARK_NETWORK_IO_SERVERTHREADS_KEY = getConfKey("io.serverThreads");
+    SPARK_NETWORK_IO_CLIENTTHREADS_KEY = getConfKey("io.clientThreads");
+    SPARK_NETWORK_IO_RECEIVEBUFFER_KEY = getConfKey("io.receiveBuffer");
+    SPARK_NETWORK_IO_SENDBUFFER_KEY = getConfKey("io.sendBuffer");
+    SPARK_NETWORK_SASL_TIMEOUT_KEY = getConfKey("sasl.timeout");
+    SPARK_NETWORK_IO_MAXRETRIES_KEY = getConfKey("io.maxRetries");
+    SPARK_NETWORK_IO_RETRYWAIT_KEY = getConfKey("io.retryWait");
+    SPARK_NETWORK_IO_LAZYFD_KEY = getConfKey("io.lazyFD");
+  }
+
+  private String getConfKey(String suffix) {
+    return "spark." + module + "." + suffix;
   }
 
   /** IO mode: nio or epoll */
-  public String ioMode() { return conf.get("spark.shuffle.io.mode", "NIO").toUpperCase(); }
+  public String ioMode() { return conf.get(SPARK_NETWORK_IO_MODE_KEY, "NIO").toUpperCase(); }
 
   /** If true, we will prefer allocating off-heap byte buffers within Netty. */
   public boolean preferDirectBufs() {
-    return conf.getBoolean("spark.shuffle.io.preferDirectBufs", true);
+    return conf.getBoolean(SPARK_NETWORK_IO_PREFERDIRECTBUFS_KEY, true);
   }
 
   /** Connect timeout in milliseconds. Default 120 secs. */
@@ -42,23 +77,23 @@ public int connectionTimeoutMs() {
     long defaultNetworkTimeoutS = JavaUtils.timeStringAsSec(
       conf.get("spark.network.timeout", "120s"));
     long defaultTimeoutMs = JavaUtils.timeStringAsSec(
-      conf.get("spark.shuffle.io.connectionTimeout", defaultNetworkTimeoutS + "s")) * 1000;
+      conf.get(SPARK_NETWORK_IO_CONNECTIONTIMEOUT_KEY, defaultNetworkTimeoutS + "s")) * 1000;
     return (int) defaultTimeoutMs;
   }
 
   /** Number of concurrent connections between two nodes for fetching data. */
   public int numConnectionsPerPeer() {
-    return conf.getInt("spark.shuffle.io.numConnectionsPerPeer", 1);
+    return conf.getInt(SPARK_NETWORK_IO_NUMCONNECTIONSPERPEER_KEY, 1);
   }
 
   /** Requested maximum length of the queue of incoming connections. Default -1 for no backlog. */
-  public int backLog() { return conf.getInt("spark.shuffle.io.backLog", -1); }
+  public int backLog() { return conf.getInt(SPARK_NETWORK_IO_BACKLOG_KEY, -1); }
 
   /** Number of threads used in the server thread pool. Default to 0, which is 2x#cores. */
-  public int serverThreads() { return conf.getInt("spark.shuffle.io.serverThreads", 0); }
+  public int serverThreads() { return conf.getInt(SPARK_NETWORK_IO_SERVERTHREADS_KEY, 0); }
 
   /** Number of threads used in the client thread pool. Default to 0, which is 2x#cores. */
-  public int clientThreads() { return conf.getInt("spark.shuffle.io.clientThreads", 0); }
+  public int clientThreads() { return conf.getInt(SPARK_NETWORK_IO_CLIENTTHREADS_KEY, 0); }
 
   /**
    * Receive buffer size (SO_RCVBUF).
@@ -67,28 +102,28 @@ public int numConnectionsPerPeer() {
    * Assuming latency = 1ms, network_bandwidth = 10Gbps
    *  buffer size should be ~ 1.25MB
    */
-  public int receiveBuf() { return conf.getInt("spark.shuffle.io.receiveBuffer", -1); }
+  public int receiveBuf() { return conf.getInt(SPARK_NETWORK_IO_RECEIVEBUFFER_KEY, -1); }
 
   /** Send buffer size (SO_SNDBUF). */
-  public int sendBuf() { return conf.getInt("spark.shuffle.io.sendBuffer", -1); }
+  public int sendBuf() { return conf.getInt(SPARK_NETWORK_IO_SENDBUFFER_KEY, -1); }
 
   /** Timeout for a single round trip of SASL token exchange, in milliseconds. */
   public int saslRTTimeoutMs() {
-    return (int) JavaUtils.timeStringAsSec(conf.get("spark.shuffle.sasl.timeout", "30s")) * 1000;
+    return (int) JavaUtils.timeStringAsSec(conf.get(SPARK_NETWORK_SASL_TIMEOUT_KEY, "30s")) * 1000;
   }
 
   /**
    * Max number of times we will try IO exceptions (such as connection timeouts) per request.
    * If set to 0, we will not do any retries.
    */
-  public int maxIORetries() { return conf.getInt("spark.shuffle.io.maxRetries", 3); }
+  public int maxIORetries() { return conf.getInt(SPARK_NETWORK_IO_MAXRETRIES_KEY, 3); }
 
   /**
    * Time (in milliseconds) that we will wait in order to perform a retry after an IOException.
    * Only relevant if maxIORetries &gt; 0.
    */
   public int ioRetryWaitTimeMs() {
-    return (int) JavaUtils.timeStringAsSec(conf.get("spark.shuffle.io.retryWait", "5s")) * 1000;
+    return (int) JavaUtils.timeStringAsSec(conf.get(SPARK_NETWORK_IO_RETRYWAIT_KEY, "5s")) * 1000;
   }
 
   /**
@@ -101,11 +136,11 @@ public int memoryMapBytes() {
   }
 
   /**
-   * Whether to initialize shuffle FileDescriptor lazily or not. If true, file descriptors are
+   * Whether to initialize FileDescriptor lazily or not. If true, file descriptors are
    * created only when data is going to be transferred. This can reduce the number of open files.
    */
   public boolean lazyFileDescriptor() {
-    return conf.getBoolean("spark.shuffle.io.lazyFD", true);
+    return conf.getBoolean(SPARK_NETWORK_IO_LAZYFD_KEY, true);
   }
 
   /**
diff --git a/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java b/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
index dfb7740344ed..dc5fa1cee69b 100644
--- a/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
@@ -83,7 +83,7 @@ public static void setUp() throws Exception {
     fp.write(fileContent);
     fp.close();
 
-    final TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+    final TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     fileChunk = new FileSegmentManagedBuffer(conf, testFile, 10, testFile.length() - 25);
 
     streamManager = new StreamManager() {
diff --git a/network/common/src/test/java/org/apache/spark/network/RequestTimeoutIntegrationSuite.java b/network/common/src/test/java/org/apache/spark/network/RequestTimeoutIntegrationSuite.java
index 84ebb337e6d5..42955ef69235 100644
--- a/network/common/src/test/java/org/apache/spark/network/RequestTimeoutIntegrationSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/RequestTimeoutIntegrationSuite.java
@@ -60,7 +60,7 @@ public class RequestTimeoutIntegrationSuite {
   public void setUp() throws Exception {
     Map<String, String> configMap = Maps.newHashMap();
     configMap.put("spark.shuffle.io.connectionTimeout", "2s");
-    conf = new TransportConf(new MapConfigProvider(configMap));
+    conf = new TransportConf("shuffle", new MapConfigProvider(configMap));
 
     defaultManager = new StreamManager() {
       @Override
diff --git a/network/common/src/test/java/org/apache/spark/network/RpcIntegrationSuite.java b/network/common/src/test/java/org/apache/spark/network/RpcIntegrationSuite.java
index 64b457b4b3f0..8eb56bdd9846 100644
--- a/network/common/src/test/java/org/apache/spark/network/RpcIntegrationSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/RpcIntegrationSuite.java
@@ -49,7 +49,7 @@ public class RpcIntegrationSuite {
 
   @BeforeClass
   public static void setUp() throws Exception {
-    TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+    TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     rpcHandler = new RpcHandler() {
       @Override
       public void receive(TransportClient client, byte[] message, RpcResponseCallback callback) {
diff --git a/network/common/src/test/java/org/apache/spark/network/StreamSuite.java b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
index 6dcec831dec7..00158fd08162 100644
--- a/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
@@ -89,7 +89,7 @@ public static void setUp() throws Exception {
       fp.close();
     }
 
-    final TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+    final TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     final StreamManager streamManager = new StreamManager() {
       @Override
       public ManagedBuffer getChunk(long streamId, int chunkIndex) {
diff --git a/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java b/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
index f44713741930..dac7d4a5b0a0 100644
--- a/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/TransportClientFactorySuite.java
@@ -52,7 +52,7 @@ public class TransportClientFactorySuite {
 
   @Before
   public void setUp() {
-    conf = new TransportConf(new SystemPropertyConfigProvider());
+    conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     RpcHandler rpcHandler = new NoOpRpcHandler();
     context = new TransportContext(conf, rpcHandler);
     server1 = context.createServer();
@@ -76,7 +76,7 @@ private void testClientReuse(final int maxConnections, boolean concurrent)
 
     Map<String, String> configMap = Maps.newHashMap();
     configMap.put("spark.shuffle.io.numConnectionsPerPeer", Integer.toString(maxConnections));
-    TransportConf conf = new TransportConf(new MapConfigProvider(configMap));
+    TransportConf conf = new TransportConf("shuffle", new MapConfigProvider(configMap));
 
     RpcHandler rpcHandler = new NoOpRpcHandler();
     TransportContext context = new TransportContext(conf, rpcHandler);
@@ -182,7 +182,7 @@ public void closeBlockClientsWithFactory() throws IOException {
 
   @Test
   public void closeIdleConnectionForRequestTimeOut() throws IOException, InterruptedException {
-    TransportConf conf = new TransportConf(new ConfigProvider() {
+    TransportConf conf = new TransportConf("shuffle", new ConfigProvider() {
 
       @Override
       public String get(String name) {
diff --git a/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java b/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
index 3469e84e7f4d..b14689967018 100644
--- a/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/sasl/SparkSaslSuite.java
@@ -207,7 +207,7 @@ public void testEncryptedMessage() throws Exception {
   public void testEncryptedMessageChunking() throws Exception {
     File file = File.createTempFile("sasltest", ".txt");
     try {
-      TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+      TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
 
       byte[] data = new byte[8 * 1024];
       new Random().nextBytes(data);
@@ -242,7 +242,7 @@ public void testFileRegionEncryption() throws Exception {
     final File file = File.createTempFile("sasltest", ".txt");
     SaslTestCtx ctx = null;
     try {
-      final TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+      final TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
       StreamManager sm = mock(StreamManager.class);
       when(sm.getChunk(anyLong(), anyInt())).thenAnswer(new Answer<ManagedBuffer>() {
           @Override
@@ -368,7 +368,7 @@ private static class SaslTestCtx {
         boolean disableClientEncryption)
       throws Exception {
 
-      TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+      TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
 
       SecretKeyHolder keyHolder = mock(SecretKeyHolder.class);
       when(keyHolder.getSaslUser(anyString())).thenReturn("user");
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
index c393a5e1e681..1c2fa4d0d462 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/sasl/SaslIntegrationSuite.java
@@ -70,7 +70,7 @@ public class SaslIntegrationSuite {
 
   @BeforeClass
   public static void beforeAll() throws IOException {
-    conf = new TransportConf(new SystemPropertyConfigProvider());
+    conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     context = new TransportContext(conf, new TestRpcHandler());
 
     secretKeyHolder = mock(SecretKeyHolder.class);
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolverSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolverSuite.java
index 3c6cb367dea4..a9958232a1d2 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolverSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleBlockResolverSuite.java
@@ -42,7 +42,7 @@ public class ExternalShuffleBlockResolverSuite {
 
   static TestShuffleDataContext dataContext;
 
-  static TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+  static TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
 
   @BeforeClass
   public static void beforeAll() throws IOException {
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleCleanupSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleCleanupSuite.java
index 2f4f1d0df478..532d7ab8d01b 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleCleanupSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleCleanupSuite.java
@@ -35,7 +35,7 @@ public class ExternalShuffleCleanupSuite {
 
   // Same-thread Executor used to ensure cleanup happens synchronously in test thread.
   Executor sameThreadExecutor = MoreExecutors.sameThreadExecutor();
-  TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+  TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
 
   @Test
   public void noCleanupAndCleanup() throws IOException {
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleIntegrationSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleIntegrationSuite.java
index a3f9a38b1aeb..2095f41d79c1 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleIntegrationSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleIntegrationSuite.java
@@ -91,7 +91,7 @@ public static void beforeAll() throws IOException {
     dataContext1.create();
     dataContext1.insertHashShuffleData(1, 0, exec1Blocks);
 
-    conf = new TransportConf(new SystemPropertyConfigProvider());
+    conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     handler = new ExternalShuffleBlockHandler(conf, null);
     TransportContext transportContext = new TransportContext(conf, handler);
     server = transportContext.createServer();
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleSecuritySuite.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleSecuritySuite.java
index aa99efda9494..08ddb3755bd0 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleSecuritySuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/ExternalShuffleSecuritySuite.java
@@ -39,7 +39,7 @@
 
 public class ExternalShuffleSecuritySuite {
 
-  TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+  TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
   TransportServer server;
 
   @Before
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/RetryingBlockFetcherSuite.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/RetryingBlockFetcherSuite.java
index 06e46f924109..3a6ef0d3f847 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/RetryingBlockFetcherSuite.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/RetryingBlockFetcherSuite.java
@@ -254,7 +254,7 @@ private static void performInteractions(List<? extends Map<String, Object>> inte
                                           BlockFetchingListener listener)
     throws IOException {
 
-    TransportConf conf = new TransportConf(new SystemPropertyConfigProvider());
+    TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     BlockFetchStarter fetchStarter = mock(BlockFetchStarter.class);
 
     Stubber stub = null;
diff --git a/network/yarn/src/main/java/org/apache/spark/network/yarn/YarnShuffleService.java b/network/yarn/src/main/java/org/apache/spark/network/yarn/YarnShuffleService.java
index 11ea7f3fd3cf..ba6d30a74c67 100644
--- a/network/yarn/src/main/java/org/apache/spark/network/yarn/YarnShuffleService.java
+++ b/network/yarn/src/main/java/org/apache/spark/network/yarn/YarnShuffleService.java
@@ -120,7 +120,7 @@ protected void serviceInit(Configuration conf) {
     registeredExecutorFile =
       findRegisteredExecutorFile(conf.getStrings("yarn.nodemanager.local-dirs"));
 
-    TransportConf transportConf = new TransportConf(new HadoopConfigProvider(conf));
+    TransportConf transportConf = new TransportConf("shuffle", new HadoopConfigProvider(conf));
     // If authentication is enabled, set up the shuffle server to use a
     // special RPC handler that filters out unauthenticated fetch requests
     boolean authEnabled = conf.getBoolean(SPARK_AUTHENTICATE_KEY, DEFAULT_SPARK_AUTHENTICATE);

From 09ad9533d5760652de59fa4830c24cb8667958ac Mon Sep 17 00:00:00 2001
From: JihongMa <linlin200605@gmail.com>
Date: Wed, 18 Nov 2015 13:03:37 -0800
Subject: [PATCH 773/896] [SPARK-11720][SQL][ML] Handle edge cases when count =
 0 or 1 for Stats function

return Double.NaN for mean/average when count == 0 for all numeric types that is converted to Double, Decimal type continue to return null.

Author: JihongMa <linlin200605@gmail.com>

Closes #9705 from JihongMA/SPARK-11720.
---
 python/pyspark/sql/dataframe.py                |  2 +-
 .../aggregate/CentralMomentAgg.scala           |  2 +-
 .../expressions/aggregate/Kurtosis.scala       |  9 +++++----
 .../expressions/aggregate/Skewness.scala       |  9 +++++----
 .../expressions/aggregate/Stddev.scala         | 18 ++++++++++++++----
 .../expressions/aggregate/Variance.scala       | 18 ++++++++++++++----
 .../spark/sql/DataFrameAggregateSuite.scala    | 18 ++++++++++++------
 .../org/apache/spark/sql/DataFrameSuite.scala  |  2 +-
 8 files changed, 53 insertions(+), 25 deletions(-)

diff --git a/python/pyspark/sql/dataframe.py b/python/pyspark/sql/dataframe.py
index ad6ad0235a90..0dd75ba7ca82 100644
--- a/python/pyspark/sql/dataframe.py
+++ b/python/pyspark/sql/dataframe.py
@@ -761,7 +761,7 @@ def describe(self, *cols):
         +-------+------------------+-----+
         |  count|                 2|    2|
         |   mean|               3.5| null|
-        | stddev|2.1213203435596424|  NaN|
+        | stddev|2.1213203435596424| null|
         |    min|                 2|Alice|
         |    max|                 5|  Bob|
         +-------+------------------+-----+
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
index de5872ab11eb..d07d4c338cdf 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/CentralMomentAgg.scala
@@ -206,7 +206,7 @@ abstract class CentralMomentAgg(child: Expression) extends ImperativeAggregate w
    * @param centralMoments Length `momentOrder + 1` array of central moments (un-normalized)
    *                       needed to compute the aggregate stat.
    */
-  def getStatistic(n: Double, mean: Double, centralMoments: Array[Double]): Double
+  def getStatistic(n: Double, mean: Double, centralMoments: Array[Double]): Any
 
   override final def eval(buffer: InternalRow): Any = {
     val n = buffer.getDouble(nOffset)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
index 8fa3aac9f1a5..c2bf2cb94116 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Kurtosis.scala
@@ -37,16 +37,17 @@ case class Kurtosis(child: Expression,
   override protected val momentOrder = 4
 
   // NOTE: this is the formula for excess kurtosis, which is default for R and SciPy
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
     val m2 = moments(2)
     val m4 = moments(4)
 
-    if (n == 0.0 || m2 == 0.0) {
+    if (n == 0.0) {
+      null
+    } else if (m2 == 0.0) {
       Double.NaN
-    }
-    else {
+    } else {
       n * m4 / (m2 * m2) - 3.0
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
index e1c01a5b8278..9411bcea2539 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Skewness.scala
@@ -36,16 +36,17 @@ case class Skewness(child: Expression,
 
   override protected val momentOrder = 3
 
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moments, received: ${moments.length}")
     val m2 = moments(2)
     val m3 = moments(3)
 
-    if (n == 0.0 || m2 == 0.0) {
+    if (n == 0.0) {
+      null
+    } else if (m2 == 0.0) {
       Double.NaN
-    }
-    else {
+    } else {
       math.sqrt(n) * m3 / math.sqrt(m2 * m2 * m2)
     }
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
index 05dd5e3b2254..eec79a9033e3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Stddev.scala
@@ -36,11 +36,17 @@ case class StddevSamp(child: Expression,
 
   override protected val momentOrder = 2
 
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-    if (n == 0.0 || n == 1.0) Double.NaN else math.sqrt(moments(2) / (n - 1.0))
+    if (n == 0.0) {
+      null
+    } else if (n == 1.0) {
+      Double.NaN
+    } else {
+      math.sqrt(moments(2) / (n - 1.0))
+    }
   }
 }
 
@@ -62,10 +68,14 @@ case class StddevPop(
 
   override protected val momentOrder = 2
 
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-    if (n == 0.0) Double.NaN else math.sqrt(moments(2) / n)
+    if (n == 0.0) {
+      null
+    } else {
+      math.sqrt(moments(2) / n)
+    }
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
index ede2da280596..cf3a74030539 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Variance.scala
@@ -36,11 +36,17 @@ case class VarianceSamp(child: Expression,
 
   override protected val momentOrder = 2
 
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-    if (n == 0.0 || n == 1.0) Double.NaN else moments(2) / (n - 1.0)
+    if (n == 0.0) {
+      null
+    } else if (n == 1.0) {
+      Double.NaN
+    } else {
+      moments(2) / (n - 1.0)
+    }
   }
 }
 
@@ -62,10 +68,14 @@ case class VariancePop(
 
   override protected val momentOrder = 2
 
-  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Double = {
+  override def getStatistic(n: Double, mean: Double, moments: Array[Double]): Any = {
     require(moments.length == momentOrder + 1,
       s"$prettyName requires ${momentOrder + 1} central moment, received: ${moments.length}")
 
-    if (n == 0.0) Double.NaN else moments(2) / n
+    if (n == 0.0) {
+      null
+    } else {
+      moments(2) / n
+    }
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index 432e8d17623a..71adf2148a40 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -205,7 +205,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     val emptyTableData = Seq.empty[(Int, Int)].toDF("a", "b")
     checkAnswer(
     emptyTableData.agg(stddev('a), stddev_pop('a), stddev_samp('a)),
-    Row(Double.NaN, Double.NaN, Double.NaN))
+    Row(null, null, null))
   }
 
   test("zero sum") {
@@ -244,17 +244,23 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
   test("zero moments") {
     val input = Seq((1, 2)).toDF("a", "b")
     checkAnswer(
-      input.agg(variance('a), var_samp('a), var_pop('a), skewness('a), kurtosis('a)),
-      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN))
+      input.agg(stddev('a), stddev_samp('a), stddev_pop('a), variance('a),
+        var_samp('a), var_pop('a), skewness('a), kurtosis('a)),
+      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN, 0.0,
+        Double.NaN, Double.NaN))
 
     checkAnswer(
       input.agg(
+        expr("stddev(a)"),
+        expr("stddev_samp(a)"),
+        expr("stddev_pop(a)"),
         expr("variance(a)"),
         expr("var_samp(a)"),
         expr("var_pop(a)"),
         expr("skewness(a)"),
         expr("kurtosis(a)")),
-      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN))
+      Row(Double.NaN, Double.NaN, 0.0, Double.NaN, Double.NaN, 0.0,
+        Double.NaN, Double.NaN))
   }
 
   test("null moments") {
@@ -262,7 +268,7 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
 
     checkAnswer(
       emptyTableData.agg(variance('a), var_samp('a), var_pop('a), skewness('a), kurtosis('a)),
-      Row(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN))
+      Row(null, null, null, null, null))
 
     checkAnswer(
       emptyTableData.agg(
@@ -271,6 +277,6 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
         expr("var_pop(a)"),
         expr("skewness(a)"),
         expr("kurtosis(a)")),
-      Row(Double.NaN, Double.NaN, Double.NaN, Double.NaN, Double.NaN))
+      Row(null, null, null, null, null))
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 5a7f24684d1b..6399b0165c4c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -459,7 +459,7 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     val emptyDescribeResult = Seq(
       Row("count", "0", "0"),
       Row("mean", null, null),
-      Row("stddev", "NaN", "NaN"),
+      Row("stddev", null, null),
       Row("min", null, null),
       Row("max", null, null))
 

From 045a4f045821dcf60442f0600c2df1b79bddb536 Mon Sep 17 00:00:00 2001
From: Wenjian Huang <nextrush@163.com>
Date: Wed, 18 Nov 2015 13:06:25 -0800
Subject: [PATCH 774/896] [SPARK-6790][ML] Add spark.ml LinearRegression
 import/export

This replaces [https://github.com/apache/spark/pull/9656] with updates.

fayeshine should be the main author when this PR is committed.

CC: mengxr fayeshine

Author: Wenjian Huang <nextrush@163.com>
Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9814 from jkbradley/fayeshine-patch-6790.
---
 .../ml/regression/LinearRegression.scala      | 77 ++++++++++++++++++-
 .../ml/regression/LinearRegressionSuite.scala | 34 +++++++-
 2 files changed, 106 insertions(+), 5 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 913140e58198..ca55d5915e68 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -22,6 +22,7 @@ import scala.collection.mutable
 import breeze.linalg.{DenseVector => BDV}
 import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS, OWLQN => BreezeOWLQN}
 import breeze.stats.distributions.StudentsT
+import org.apache.hadoop.fs.Path
 
 import org.apache.spark.{Logging, SparkException}
 import org.apache.spark.ml.feature.Instance
@@ -30,7 +31,7 @@ import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param.ParamMap
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.evaluation.RegressionMetrics
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.linalg.BLAS._
@@ -65,7 +66,7 @@ private[regression] trait LinearRegressionParams extends PredictorParams
 @Experimental
 class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String)
   extends Regressor[Vector, LinearRegression, LinearRegressionModel]
-  with LinearRegressionParams with Logging {
+  with LinearRegressionParams with Writable with Logging {
 
   @Since("1.4.0")
   def this() = this(Identifiable.randomUID("linReg"))
@@ -341,6 +342,19 @@ class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String
 
   @Since("1.4.0")
   override def copy(extra: ParamMap): LinearRegression = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object LinearRegression extends Readable[LinearRegression] {
+
+  @Since("1.6.0")
+  override def read: Reader[LinearRegression] = new DefaultParamsReader[LinearRegression]
+
+  @Since("1.6.0")
+  override def load(path: String): LinearRegression = read.load(path)
 }
 
 /**
@@ -354,7 +368,7 @@ class LinearRegressionModel private[ml] (
     val coefficients: Vector,
     val intercept: Double)
   extends RegressionModel[Vector, LinearRegressionModel]
-  with LinearRegressionParams {
+  with LinearRegressionParams with Writable {
 
   private var trainingSummary: Option[LinearRegressionTrainingSummary] = None
 
@@ -422,6 +436,63 @@ class LinearRegressionModel private[ml] (
     if (trainingSummary.isDefined) newModel.setSummary(trainingSummary.get)
     newModel.setParent(parent)
   }
+
+  /**
+   * Returns a [[Writer]] instance for this ML instance.
+   *
+   * For [[LinearRegressionModel]], this does NOT currently save the training [[summary]].
+   * An option to save [[summary]] may be added in the future.
+   *
+   * This also does not save the [[parent]] currently.
+   */
+  @Since("1.6.0")
+  override def write: Writer = new LinearRegressionModel.LinearRegressionModelWriter(this)
+}
+
+@Since("1.6.0")
+object LinearRegressionModel extends Readable[LinearRegressionModel] {
+
+  @Since("1.6.0")
+  override def read: Reader[LinearRegressionModel] = new LinearRegressionModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): LinearRegressionModel = read.load(path)
+
+  /** [[Writer]] instance for [[LinearRegressionModel]] */
+  private[LinearRegressionModel] class LinearRegressionModelWriter(instance: LinearRegressionModel)
+    extends Writer with Logging {
+
+    private case class Data(intercept: Double, coefficients: Vector)
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: intercept, coefficients
+      val data = Data(instance.intercept, instance.coefficients)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
+    }
+  }
+
+  private class LinearRegressionModelReader extends Reader[LinearRegressionModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = "org.apache.spark.ml.regression.LinearRegressionModel"
+
+    override def load(path: String): LinearRegressionModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.format("parquet").load(dataPath)
+        .select("intercept", "coefficients").head()
+      val intercept = data.getDouble(0)
+      val coefficients = data.getAs[Vector](1)
+      val model = new LinearRegressionModel(metadata.uid, coefficients, intercept)
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
 }
 
 /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
index a1d86fe8feda..2bdc0e184d73 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/LinearRegressionSuite.scala
@@ -22,14 +22,15 @@ import scala.util.Random
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.linalg.{Vector, DenseVector, Vectors}
 import org.apache.spark.mllib.util.{LinearDataGenerator, MLlibTestSparkContext}
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row}
 
-class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class LinearRegressionSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   private val seed: Int = 42
   @transient var datasetWithDenseFeature: DataFrame = _
@@ -854,4 +855,33 @@ class LinearRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
     model.summary.tValues.zip(tValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
     model.summary.pValues.zip(pValsR).foreach{ x => assert(x._1 ~== x._2 absTol 1E-3) }
   }
+
+  test("read/write") {
+    def checkModelData(model: LinearRegressionModel, model2: LinearRegressionModel): Unit = {
+      assert(model.intercept === model2.intercept)
+      assert(model.coefficients === model2.coefficients)
+    }
+    val lr = new LinearRegression()
+    testEstimatorAndModelReadWrite(lr, datasetWithWeight, LinearRegressionSuite.allParamSettings,
+      checkModelData)
+  }
+}
+
+object LinearRegressionSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "regParam" -> 0.01,
+    "elasticNetParam" -> 0.1,
+    "maxIter" -> 2,  // intentionally small
+    "fitIntercept" -> true,
+    "tol" -> 0.8,
+    "standardization" -> false,
+    "solver" -> "l-bfgs"
+  )
 }

From 2acdf10b1f3bb1242dba64efa798c672fde9f0d2 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Wed, 18 Nov 2015 13:16:31 -0800
Subject: [PATCH 775/896] [SPARK-6789][ML] Add Readable, Writable support for
 spark.ml ALS, ALSModel

Also modifies DefaultParamsWriter.saveMetadata to take optional extra metadata.

CC: mengxr yanboliang

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9786 from jkbradley/als-io.
---
 .../apache/spark/ml/recommendation/ALS.scala  | 75 ++++++++++++++++--
 .../org/apache/spark/ml/util/ReadWrite.scala  | 14 +++-
 .../spark/ml/recommendation/ALSSuite.scala    | 78 ++++++++++++++++---
 3 files changed, 150 insertions(+), 17 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index 535f266b9a94..d92514d2e239 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -27,13 +27,16 @@ import scala.util.hashing.byteswap64
 
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
 import org.apache.hadoop.fs.{FileSystem, Path}
+import org.json4s.{DefaultFormats, JValue}
+import org.json4s.JsonDSL._
+import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.{Logging, Partitioner}
-import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.annotation.{Since, DeveloperApi, Experimental}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.CholeskyDecomposition
 import org.apache.spark.mllib.optimization.NNLS
 import org.apache.spark.rdd.RDD
@@ -182,7 +185,7 @@ class ALSModel private[ml] (
     val rank: Int,
     @transient val userFactors: DataFrame,
     @transient val itemFactors: DataFrame)
-  extends Model[ALSModel] with ALSModelParams {
+  extends Model[ALSModel] with ALSModelParams with Writable {
 
   /** @group setParam */
   def setUserCol(value: String): this.type = set(userCol, value)
@@ -220,8 +223,60 @@ class ALSModel private[ml] (
     val copied = new ALSModel(uid, rank, userFactors, itemFactors)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new ALSModel.ALSModelWriter(this)
 }
 
+@Since("1.6.0")
+object ALSModel extends Readable[ALSModel] {
+
+  @Since("1.6.0")
+  override def read: Reader[ALSModel] = new ALSModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): ALSModel = read.load(path)
+
+  private[recommendation] class ALSModelWriter(instance: ALSModel) extends Writer {
+
+    override protected def saveImpl(path: String): Unit = {
+      val extraMetadata = render("rank" -> instance.rank)
+      DefaultParamsWriter.saveMetadata(instance, path, sc, Some(extraMetadata))
+      val userPath = new Path(path, "userFactors").toString
+      instance.userFactors.write.format("parquet").save(userPath)
+      val itemPath = new Path(path, "itemFactors").toString
+      instance.itemFactors.write.format("parquet").save(itemPath)
+    }
+  }
+
+  private[recommendation] class ALSModelReader extends Reader[ALSModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = "org.apache.spark.ml.recommendation.ALSModel"
+
+    override def load(path: String): ALSModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      implicit val format = DefaultFormats
+      val rank: Int = metadata.extraMetadata match {
+        case Some(m: JValue) =>
+          (m \ "rank").extract[Int]
+        case None =>
+          throw new RuntimeException(s"ALSModel loader could not read rank from JSON metadata:" +
+            s" ${metadata.metadataStr}")
+      }
+
+      val userPath = new Path(path, "userFactors").toString
+      val userFactors = sqlContext.read.format("parquet").load(userPath)
+      val itemPath = new Path(path, "itemFactors").toString
+      val itemFactors = sqlContext.read.format("parquet").load(itemPath)
+
+      val model = new ALSModel(metadata.uid, rank, userFactors, itemFactors)
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+}
 
 /**
  * :: Experimental ::
@@ -254,7 +309,7 @@ class ALSModel private[ml] (
  * preferences rather than explicit ratings given to items.
  */
 @Experimental
-class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams {
+class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams with Writable {
 
   import org.apache.spark.ml.recommendation.ALS.Rating
 
@@ -336,8 +391,12 @@ class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams {
   }
 
   override def copy(extra: ParamMap): ALS = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
 }
 
+
 /**
  * :: DeveloperApi ::
  * An implementation of ALS that supports generic ID types, specialized for Int and Long. This is
@@ -347,7 +406,7 @@ class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams {
  * than 2 billion.
  */
 @DeveloperApi
-object ALS extends Logging {
+object ALS extends Readable[ALS] with Logging {
 
   /**
    * :: DeveloperApi ::
@@ -356,6 +415,12 @@ object ALS extends Logging {
   @DeveloperApi
   case class Rating[@specialized(Int, Long) ID](user: ID, item: ID, rating: Float)
 
+  @Since("1.6.0")
+  override def read: Reader[ALS] = new DefaultParamsReader[ALS]
+
+  @Since("1.6.0")
+  override def load(path: String): ALS = read.load(path)
+
   /** Trait for least squares solvers applied to the normal equation. */
   private[recommendation] trait LeastSquaresNESolver extends Serializable {
     /** Solves a least squares problem with regularization (possibly with other constraints). */
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index dddb72af5ba7..d8ce907af532 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -194,7 +194,11 @@ private[ml] object DefaultParamsWriter {
    *  - uid
    *  - paramMap: These must be encodable using [[org.apache.spark.ml.param.Param.jsonEncode()]].
    */
-  def saveMetadata(instance: Params, path: String, sc: SparkContext): Unit = {
+  def saveMetadata(
+      instance: Params,
+      path: String,
+      sc: SparkContext,
+      extraMetadata: Option[JValue] = None): Unit = {
     val uid = instance.uid
     val cls = instance.getClass.getName
     val params = instance.extractParamMap().toSeq.asInstanceOf[Seq[ParamPair[Any]]]
@@ -205,7 +209,8 @@ private[ml] object DefaultParamsWriter {
       ("timestamp" -> System.currentTimeMillis()) ~
       ("sparkVersion" -> sc.version) ~
       ("uid" -> uid) ~
-      ("paramMap" -> jsonParams)
+      ("paramMap" -> jsonParams) ~
+      ("extraMetadata" -> extraMetadata)
     val metadataPath = new Path(path, "metadata").toString
     val metadataJson = compact(render(metadata))
     sc.parallelize(Seq(metadataJson), 1).saveAsTextFile(metadataPath)
@@ -236,6 +241,7 @@ private[ml] object DefaultParamsReader {
   /**
    * All info from metadata file.
    * @param params  paramMap, as a [[JValue]]
+   * @param extraMetadata  Extra metadata saved by [[DefaultParamsWriter.saveMetadata()]]
    * @param metadataStr  Full metadata file String (for debugging)
    */
   case class Metadata(
@@ -244,6 +250,7 @@ private[ml] object DefaultParamsReader {
       timestamp: Long,
       sparkVersion: String,
       params: JValue,
+      extraMetadata: Option[JValue],
       metadataStr: String)
 
   /**
@@ -262,12 +269,13 @@ private[ml] object DefaultParamsReader {
     val timestamp = (metadata \ "timestamp").extract[Long]
     val sparkVersion = (metadata \ "sparkVersion").extract[String]
     val params = metadata \ "paramMap"
+    val extraMetadata = (metadata \ "extraMetadata").extract[Option[JValue]]
     if (expectedClassName.nonEmpty) {
       require(className == expectedClassName, s"Error loading metadata: Expected class name" +
         s" $expectedClassName but found class name $className")
     }
 
-    Metadata(className, uid, timestamp, sparkVersion, params, metadataStr)
+    Metadata(className, uid, timestamp, sparkVersion, params, extraMetadata, metadataStr)
   }
 
   /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/recommendation/ALSSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/recommendation/ALSSuite.scala
index eadc80e0e62b..2c3fb84160dc 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/recommendation/ALSSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/recommendation/ALSSuite.scala
@@ -17,7 +17,6 @@
 
 package org.apache.spark.ml.recommendation
 
-import java.io.File
 import java.util.Random
 
 import scala.collection.mutable
@@ -26,28 +25,26 @@ import scala.language.existentials
 
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
 
+import org.apache.spark.util.Utils
 import org.apache.spark.{Logging, SparkException, SparkFunSuite}
 import org.apache.spark.ml.recommendation.ALS._
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{Row, SQLContext}
-import org.apache.spark.util.Utils
+import org.apache.spark.sql.{DataFrame, Row}
 
-class ALSSuite extends SparkFunSuite with MLlibTestSparkContext with Logging {
 
-  private var tempDir: File = _
+class ALSSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest with Logging {
 
   override def beforeAll(): Unit = {
     super.beforeAll()
-    tempDir = Utils.createTempDir()
     sc.setCheckpointDir(tempDir.getAbsolutePath)
   }
 
   override def afterAll(): Unit = {
-    Utils.deleteRecursively(tempDir)
     super.afterAll()
   }
 
@@ -186,7 +183,7 @@ class ALSSuite extends SparkFunSuite with MLlibTestSparkContext with Logging {
     assert(compressed.dstPtrs.toSeq === Seq(0, 2, 3, 4, 5))
     var decompressed = ArrayBuffer.empty[(Int, Int, Int, Float)]
     var i = 0
-    while (i < compressed.srcIds.size) {
+    while (i < compressed.srcIds.length) {
       var j = compressed.dstPtrs(i)
       while (j < compressed.dstPtrs(i + 1)) {
         val dstEncodedIndex = compressed.dstEncodedIndices(j)
@@ -483,4 +480,67 @@ class ALSSuite extends SparkFunSuite with MLlibTestSparkContext with Logging {
     ALS.train(ratings, rank = 1, maxIter = 50, numUserBlocks = 2, numItemBlocks = 2,
       implicitPrefs = true, seed = 0)
   }
+
+  test("read/write") {
+    import ALSSuite._
+    val (ratings, _) = genExplicitTestData(numUsers = 4, numItems = 4, rank = 1)
+    val als = new ALS()
+    allEstimatorParamSettings.foreach { case (p, v) =>
+      als.set(als.getParam(p), v)
+    }
+    val sqlContext = this.sqlContext
+    import sqlContext.implicits._
+    val model = als.fit(ratings.toDF())
+
+    // Test Estimator save/load
+    val als2 = testDefaultReadWrite(als)
+    allEstimatorParamSettings.foreach { case (p, v) =>
+      val param = als.getParam(p)
+      assert(als.get(param).get === als2.get(param).get)
+    }
+
+    // Test Model save/load
+    val model2 = testDefaultReadWrite(model)
+    allModelParamSettings.foreach { case (p, v) =>
+      val param = model.getParam(p)
+      assert(model.get(param).get === model2.get(param).get)
+    }
+    assert(model.rank === model2.rank)
+    def getFactors(df: DataFrame): Set[(Int, Array[Float])] = {
+      df.select("id", "features").collect().map { case r =>
+        (r.getInt(0), r.getAs[Array[Float]](1))
+      }.toSet
+    }
+    assert(getFactors(model.userFactors) === getFactors(model2.userFactors))
+    assert(getFactors(model.itemFactors) === getFactors(model2.itemFactors))
+  }
+}
+
+object ALSSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allModelParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPredictionCol"
+  )
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allEstimatorParamSettings: Map[String, Any] = allModelParamSettings ++ Map(
+    "maxIter" -> 1,
+    "rank" -> 1,
+    "regParam" -> 0.01,
+    "numUserBlocks" -> 2,
+    "numItemBlocks" -> 2,
+    "implicitPrefs" -> true,
+    "alpha" -> 0.9,
+    "nonnegative" -> true,
+    "checkpointInterval" -> 20
+  )
 }

From e391abdf2cb6098a35347bd123b815ee9ac5b689 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Wed, 18 Nov 2015 13:25:15 -0800
Subject: [PATCH 776/896] [SPARK-11813][MLLIB] Avoid serialization of vocab in
 Word2Vec

jira: https://issues.apache.org/jira/browse/SPARK-11813

I found the problem during training a large corpus. Avoid serialization of vocab in Word2Vec has 2 benefits.
1. Performance improvement for less serialization.
2. Increase the capacity of Word2Vec a lot.
Currently in the fit of word2vec, the closure mainly includes serialization of Word2Vec and 2 global table.
the main part of Word2vec is the vocab of size: vocab * 40 * 2 * 4 = 320 vocab
2 global table: vocab * vectorSize * 8. If vectorSize = 20, that's 160 vocab.

Their sum cannot exceed Int.max due to the restriction of ByteArrayOutputStream. In any case, avoiding serialization of vocab helps decrease the size of the closure serialization, especially when vectorSize is small, thus to allow larger vocabulary.

Actually there's another possible fix, make local copy of fields to avoid including Word2Vec in the closure. Let me know if that's preferred.

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #9803 from hhbyyh/w2vVocab.
---
 .../main/scala/org/apache/spark/mllib/feature/Word2Vec.scala  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
index f3e4d346e358..7ab0d89d23a3 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
@@ -145,8 +145,8 @@ class Word2Vec extends Serializable with Logging {
 
   private var trainWordsCount = 0
   private var vocabSize = 0
-  private var vocab: Array[VocabWord] = null
-  private var vocabHash = mutable.HashMap.empty[String, Int]
+  @transient private var vocab: Array[VocabWord] = null
+  @transient private var vocabHash = mutable.HashMap.empty[String, Int]
 
   private def learnVocab(words: RDD[String]): Unit = {
     vocab = words.map(w => (w, 1))

From e222d758499ad2609046cc1a2cc8afb45c5bccbb Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 18 Nov 2015 13:30:29 -0800
Subject: [PATCH 777/896] [SPARK-11684][R][ML][DOC] Update SparkR glm API doc,
 user guide and example codes

This PR includes:
* Update SparkR:::glm, SparkR:::summary API docs.
* Update SparkR machine learning user guide and example codes to show:
  * supporting feature interaction in R formula.
  * summary for gaussian GLM model.
  * coefficients for binomial GLM model.

mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9727 from yanboliang/spark-11684.
---
 R/pkg/R/mllib.R                               | 18 +++++--
 docs/sparkr.md                                | 50 ++++++++++++++++---
 .../ml/regression/LinearRegression.scala      |  3 ++
 3 files changed, 60 insertions(+), 11 deletions(-)

diff --git a/R/pkg/R/mllib.R b/R/pkg/R/mllib.R
index f23e1c7f1fce..8d3b4388ae57 100644
--- a/R/pkg/R/mllib.R
+++ b/R/pkg/R/mllib.R
@@ -32,6 +32,12 @@ setClass("PipelineModel", representation(model = "jobj"))
 #' @param family Error distribution. "gaussian" -> linear regression, "binomial" -> logistic reg.
 #' @param lambda Regularization parameter
 #' @param alpha Elastic-net mixing parameter (see glmnet's documentation for details)
+#' @param standardize Whether to standardize features before training
+#' @param solver The solver algorithm used for optimization, this can be "l-bfgs", "normal" and
+#'               "auto". "l-bfgs" denotes Limited-memory BFGS which is a limited-memory
+#'               quasi-Newton optimization method. "normal" denotes using Normal Equation as an
+#'               analytical solution to the linear regression problem. The default value is "auto"
+#'               which means that the solver algorithm is selected automatically.
 #' @return a fitted MLlib model
 #' @rdname glm
 #' @export
@@ -79,9 +85,15 @@ setMethod("predict", signature(object = "PipelineModel"),
 #'
 #' Returns the summary of a model produced by glm(), similarly to R's summary().
 #'
-#' @param x A fitted MLlib model
-#' @return a list with a 'coefficient' component, which is the matrix of coefficients. See
-#'         summary.glm for more information.
+#' @param object A fitted MLlib model
+#' @return a list with 'devianceResiduals' and 'coefficients' components for gaussian family
+#'         or a list with 'coefficients' component for binomial family. \cr
+#'         For gaussian family: the 'devianceResiduals' gives the min/max deviance residuals
+#'         of the estimation, the 'coefficients' gives the estimated coefficients and their
+#'         estimated standard errors, t values and p-values. (It only available when model
+#'         fitted by normal solver.) \cr
+#'         For binomial family: the 'coefficients' gives the estimated coefficients.
+#'         See summary.glm for more information. \cr
 #' @rdname summary
 #' @export
 #' @examples
diff --git a/docs/sparkr.md b/docs/sparkr.md
index 437bd4756c27..a744b76be746 100644
--- a/docs/sparkr.md
+++ b/docs/sparkr.md
@@ -286,24 +286,37 @@ head(teenagers)
 
 # Machine Learning
 
-SparkR allows the fitting of generalized linear models over DataFrames using the [glm()](api/R/glm.html) function. Under the hood, SparkR uses MLlib to train a model of the specified family. Currently the gaussian and binomial families are supported. We support a subset of the available R formula operators for model fitting, including '~', '.', '+', and '-'. The example below shows the use of building a gaussian GLM model using SparkR.
+SparkR allows the fitting of generalized linear models over DataFrames using the [glm()](api/R/glm.html) function. Under the hood, SparkR uses MLlib to train a model of the specified family. Currently the gaussian and binomial families are supported. We support a subset of the available R formula operators for model fitting, including '~', '.', ':', '+', and '-'. 
+
+The [summary()](api/R/summary.html) function gives the summary of a model produced by [glm()](api/R/glm.html).
+
+* For gaussian GLM model, it returns a list with 'devianceResiduals' and 'coefficients' components. The 'devianceResiduals' gives the min/max deviance residuals of the estimation; the 'coefficients' gives the estimated coefficients and their estimated standard errors, t values and p-values. (It only available when model fitted by normal solver.)
+* For binomial GLM model, it returns a list with 'coefficients' component which gives the estimated coefficients.
+
+The examples below show the use of building gaussian GLM model and binomial GLM model using SparkR.
+
+## Gaussian GLM model
 
 <div data-lang="r"  markdown="1">
 {% highlight r %}
 # Create the DataFrame
 df <- createDataFrame(sqlContext, iris)
 
-# Fit a linear model over the dataset.
+# Fit a gaussian GLM model over the dataset.
 model <- glm(Sepal_Length ~ Sepal_Width + Species, data = df, family = "gaussian")
 
-# Model coefficients are returned in a similar format to R's native glm().
+# Model summary are returned in a similar format to R's native glm().
 summary(model)
+##$devianceResiduals
+## Min       Max     
+## -1.307112 1.412532
+##
 ##$coefficients
-##                    Estimate
-##(Intercept)        2.2513930
-##Sepal_Width        0.8035609
-##Species_versicolor 1.4587432
-##Species_virginica  1.9468169
+##                   Estimate  Std. Error t value  Pr(>|t|)    
+##(Intercept)        2.251393  0.3697543  6.08889  9.568102e-09
+##Sepal_Width        0.8035609 0.106339   7.556598 4.187317e-12
+##Species_versicolor 1.458743  0.1121079  13.01195 0           
+##Species_virginica  1.946817  0.100015   19.46525 0           
 
 # Make predictions based on the model.
 predictions <- predict(model, newData = df)
@@ -317,3 +330,24 @@ head(select(predictions, "Sepal_Length", "prediction"))
 ##6          5.4   5.385281
 {% endhighlight %}
 </div>
+
+## Binomial GLM model
+
+<div data-lang="r"  markdown="1">
+{% highlight r %}
+# Create the DataFrame
+df <- createDataFrame(sqlContext, iris)
+training <- filter(df, df$Species != "setosa")
+
+# Fit a binomial GLM model over the dataset.
+model <- glm(Species ~ Sepal_Length + Sepal_Width, data = training, family = "binomial")
+
+# Model coefficients are returned in a similar format to R's native glm().
+summary(model)
+##$coefficients
+##               Estimate
+##(Intercept)  -13.046005
+##Sepal_Length   1.902373
+##Sepal_Width    0.404655
+{% endhighlight %}
+</div>
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index ca55d5915e68..f7c44f0a51b8 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -145,6 +145,9 @@ class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String
   /**
    * Set the solver algorithm used for optimization.
    * In case of linear regression, this can be "l-bfgs", "normal" and "auto".
+   * "l-bfgs" denotes Limited-memory BFGS which is a limited-memory quasi-Newton
+   * optimization method. "normal" denotes using Normal Equation as an analytical
+   * solution to the linear regression problem.
    * The default value is "auto" which means that the solver algorithm is
    * selected automatically.
    * @group setParam

From 603a721c21488e17c15c45ce1de893e6b3d02274 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Wed, 18 Nov 2015 13:32:06 -0800
Subject: [PATCH 778/896] [SPARK-11820][ML][PYSPARK] PySpark LiR & LoR should
 support weightCol

[SPARK-7685](https://issues.apache.org/jira/browse/SPARK-7685) and [SPARK-9642](https://issues.apache.org/jira/browse/SPARK-9642) have already supported setting weight column for ```LogisticRegression``` and ```LinearRegression```. It's a very important feature, PySpark should also support. mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9811 from yanboliang/spark-11820.
---
 python/pyspark/ml/classification.py | 17 +++++++++--------
 python/pyspark/ml/regression.py     | 16 ++++++++--------
 2 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/python/pyspark/ml/classification.py b/python/pyspark/ml/classification.py
index 603f2c7f798d..4a2982e2047f 100644
--- a/python/pyspark/ml/classification.py
+++ b/python/pyspark/ml/classification.py
@@ -36,7 +36,8 @@
 @inherit_doc
 class LogisticRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
                          HasRegParam, HasTol, HasProbabilityCol, HasRawPredictionCol,
-                         HasElasticNetParam, HasFitIntercept, HasStandardization, HasThresholds):
+                         HasElasticNetParam, HasFitIntercept, HasStandardization, HasThresholds,
+                         HasWeightCol):
     """
     Logistic regression.
     Currently, this class only supports binary classification.
@@ -44,9 +45,9 @@ class LogisticRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredicti
     >>> from pyspark.sql import Row
     >>> from pyspark.mllib.linalg import Vectors
     >>> df = sc.parallelize([
-    ...     Row(label=1.0, features=Vectors.dense(1.0)),
-    ...     Row(label=0.0, features=Vectors.sparse(1, [], []))]).toDF()
-    >>> lr = LogisticRegression(maxIter=5, regParam=0.01)
+    ...     Row(label=1.0, weight=2.0, features=Vectors.dense(1.0)),
+    ...     Row(label=0.0, weight=2.0, features=Vectors.sparse(1, [], []))]).toDF()
+    >>> lr = LogisticRegression(maxIter=5, regParam=0.01, weightCol="weight")
     >>> model = lr.fit(df)
     >>> model.weights
     DenseVector([5.5...])
@@ -80,12 +81,12 @@ class LogisticRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredicti
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
                  threshold=0.5, thresholds=None, probabilityCol="probability",
-                 rawPredictionCol="rawPrediction", standardization=True):
+                 rawPredictionCol="rawPrediction", standardization=True, weightCol=None):
         """
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
                  threshold=0.5, thresholds=None, probabilityCol="probability", \
-                 rawPredictionCol="rawPrediction", standardization=True)
+                 rawPredictionCol="rawPrediction", standardization=True, weightCol=None)
         If the threshold and thresholds Params are both set, they must be equivalent.
         """
         super(LogisticRegression, self).__init__()
@@ -105,12 +106,12 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
                   threshold=0.5, thresholds=None, probabilityCol="probability",
-                  rawPredictionCol="rawPrediction", standardization=True):
+                  rawPredictionCol="rawPrediction", standardization=True, weightCol=None):
         """
         setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                   maxIter=100, regParam=0.1, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
                   threshold=0.5, thresholds=None, probabilityCol="probability", \
-                  rawPredictionCol="rawPrediction", standardization=True)
+                  rawPredictionCol="rawPrediction", standardization=True, weightCol=None)
         Sets params for logistic regression.
         If the threshold and thresholds Params are both set, they must be equivalent.
         """
diff --git a/python/pyspark/ml/regression.py b/python/pyspark/ml/regression.py
index 7648bf13266b..944e648ec880 100644
--- a/python/pyspark/ml/regression.py
+++ b/python/pyspark/ml/regression.py
@@ -35,7 +35,7 @@
 @inherit_doc
 class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPredictionCol, HasMaxIter,
                        HasRegParam, HasTol, HasElasticNetParam, HasFitIntercept,
-                       HasStandardization, HasSolver):
+                       HasStandardization, HasSolver, HasWeightCol):
     """
     Linear regression.
 
@@ -50,9 +50,9 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
 
     >>> from pyspark.mllib.linalg import Vectors
     >>> df = sqlContext.createDataFrame([
-    ...     (1.0, Vectors.dense(1.0)),
-    ...     (0.0, Vectors.sparse(1, [], []))], ["label", "features"])
-    >>> lr = LinearRegression(maxIter=5, regParam=0.0, solver="normal")
+    ...     (1.0, 2.0, Vectors.dense(1.0)),
+    ...     (0.0, 2.0, Vectors.sparse(1, [], []))], ["label", "weight", "features"])
+    >>> lr = LinearRegression(maxIter=5, regParam=0.0, solver="normal", weightCol="weight")
     >>> model = lr.fit(df)
     >>> test0 = sqlContext.createDataFrame([(Vectors.dense(-1.0),)], ["features"])
     >>> abs(model.transform(test0).head().prediction - (-1.0)) < 0.001
@@ -75,11 +75,11 @@ class LinearRegression(JavaEstimator, HasFeaturesCol, HasLabelCol, HasPrediction
     @keyword_only
     def __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                  maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
-                 standardization=True, solver="auto"):
+                 standardization=True, solver="auto", weightCol=None):
         """
         __init__(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                  maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
-                 standardization=True, solver="auto")
+                 standardization=True, solver="auto", weightCol=None)
         """
         super(LinearRegression, self).__init__()
         self._java_obj = self._new_java_obj(
@@ -92,11 +92,11 @@ def __init__(self, featuresCol="features", labelCol="label", predictionCol="pred
     @since("1.4.0")
     def setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction",
                   maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True,
-                  standardization=True, solver="auto"):
+                  standardization=True, solver="auto", weightCol=None):
         """
         setParams(self, featuresCol="features", labelCol="label", predictionCol="prediction", \
                   maxIter=100, regParam=0.0, elasticNetParam=0.0, tol=1e-6, fitIntercept=True, \
-                  standardization=True, solver="auto")
+                  standardization=True, solver="auto", weightCol=None)
         Sets params for linear regression.
         """
         kwargs = self.setParams._input_kwargs

From 54db79702513e11335c33bcf3a03c59e965e6f16 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Wed, 18 Nov 2015 14:05:18 -0800
Subject: [PATCH 779/896] [SPARK-11544][SQL] sqlContext doesn't use PathFilter

Apply the user supplied pathfilter while retrieving the files from fs.

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #9652 from dilipbiswal/spark-11544.
---
 .../apache/spark/sql/sources/interfaces.scala | 25 ++++++++++---
 .../datasources/json/JsonSuite.scala          | 36 +++++++++++++++++--
 2 files changed, 54 insertions(+), 7 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index b3d3bdf50df6..f9465157c936 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -21,7 +21,8 @@ import scala.collection.mutable
 import scala.util.Try
 
 import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
+import org.apache.hadoop.fs.{PathFilter, FileStatus, FileSystem, Path}
+import org.apache.hadoop.mapred.{JobConf, FileInputFormat}
 import org.apache.hadoop.mapreduce.{Job, TaskAttemptContext}
 
 import org.apache.spark.{Logging, SparkContext}
@@ -447,9 +448,15 @@ abstract class HadoopFsRelation private[sql](
           val hdfsPath = new Path(path)
           val fs = hdfsPath.getFileSystem(hadoopConf)
           val qualified = hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
-
           logInfo(s"Listing $qualified on driver")
-          Try(fs.listStatus(qualified)).getOrElse(Array.empty)
+          // Dummy jobconf to get to the pathFilter defined in configuration
+          val jobConf = new JobConf(hadoopConf, this.getClass())
+          val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
+          if (pathFilter != null) {
+            Try(fs.listStatus(qualified, pathFilter)).getOrElse(Array.empty)
+          } else {
+            Try(fs.listStatus(qualified)).getOrElse(Array.empty)
+          }
         }.filterNot { status =>
           val name = status.getPath.getName
           name.toLowerCase == "_temporary" || name.startsWith(".")
@@ -847,8 +854,16 @@ private[sql] object HadoopFsRelation extends Logging {
     if (name == "_temporary" || name.startsWith(".")) {
       Array.empty
     } else {
-      val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
-      files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      // Dummy jobconf to get to the pathFilter defined in configuration
+      val jobConf = new JobConf(fs.getConf, this.getClass())
+      val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
+      if (pathFilter != null) {
+        val (dirs, files) = fs.listStatus(status.getPath, pathFilter).partition(_.isDir)
+        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      } else {
+        val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
+        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      }
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index 6042b1178aff..f09b61e83815 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -19,19 +19,27 @@ package org.apache.spark.sql.execution.datasources.json
 
 import java.io.{File, StringWriter}
 import java.sql.{Date, Timestamp}
+import scala.collection.JavaConverters._
 
 import com.fasterxml.jackson.core.JsonFactory
-import org.apache.spark.rdd.RDD
+import org.apache.commons.io.FileUtils
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.fs.{Path, PathFilter}
 import org.scalactic.Tolerance._
 
+import org.apache.spark.rdd.RDD
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
-import org.apache.spark.sql.execution.datasources.{ResolvedDataSource, LogicalRelation}
+import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.execution.datasources.json.InferSchema.compatibleType
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
 
+class TestFileFilter extends PathFilter {
+  override def accept(path: Path): Boolean = path.getParent.getName != "p=2"
+}
+
 class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
   import testImplicits._
 
@@ -1390,4 +1398,28 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
       )
     }
   }
+
+  test("SPARK-11544 test pathfilter") {
+    withTempPath { dir =>
+      val path = dir.getCanonicalPath
+
+      val df = sqlContext.range(2)
+      df.write.json(path + "/p=1")
+      df.write.json(path + "/p=2")
+      assert(sqlContext.read.json(path).count() === 4)
+
+      val clonedConf = new Configuration(hadoopConfiguration)
+      try {
+        hadoopConfiguration.setClass(
+          "mapreduce.input.pathFilter.class",
+          classOf[TestFileFilter],
+          classOf[PathFilter])
+        assert(sqlContext.read.json(path).count() === 2)
+      } finally {
+        // Hadoop 1 doesn't have `Configuration.unset`
+        hadoopConfiguration.clear()
+        clonedConf.asScala.foreach(entry => hadoopConfiguration.set(entry.getKey, entry.getValue))
+      }
+    }
+  }
 }

From 5df08949f5d9e5b4b0e9c2db50c1b4eb93383de3 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 18 Nov 2015 15:42:07 -0800
Subject: [PATCH 780/896] [SPARK-11810][SQL] Java-based encoder for opaque
 types in Datasets.

This patch refactors the existing Kryo encoder expressions and adds support for Java serialization.

Author: Reynold Xin <rxin@databricks.com>

Closes #9802 from rxin/SPARK-11810.
---
 .../scala/org/apache/spark/sql/Encoder.scala  | 41 +++++++++---
 .../sql/catalyst/expressions/objects.scala    | 67 ++++++++++++-------
 .../catalyst/encoders/FlatEncoderSuite.scala  | 27 ++++++--
 .../org/apache/spark/sql/DatasetSuite.scala   | 36 +++++++++-
 4 files changed, 130 insertions(+), 41 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 79c2255641c0..1ed5111440c8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -20,7 +20,7 @@ package org.apache.spark.sql
 import scala.reflect.{ClassTag, classTag}
 
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
-import org.apache.spark.sql.catalyst.expressions.{DeserializeWithKryo, BoundReference, SerializeWithKryo}
+import org.apache.spark.sql.catalyst.expressions.{DecodeUsingSerializer, BoundReference, EncodeUsingSerializer}
 import org.apache.spark.sql.types._
 
 /**
@@ -43,28 +43,49 @@ trait Encoder[T] extends Serializable {
  */
 object Encoders {
 
-  /**
-   * (Scala-specific) Creates an encoder that serializes objects of type T using Kryo.
-   * This encoder maps T into a single byte array (binary) field.
-   */
-  def kryo[T: ClassTag]: Encoder[T] = {
-    val ser = SerializeWithKryo(BoundReference(0, ObjectType(classOf[AnyRef]), nullable = true))
-    val deser = DeserializeWithKryo[T](BoundReference(0, BinaryType, nullable = true), classTag[T])
+  /** A way to construct encoders using generic serializers. */
+  private def genericSerializer[T: ClassTag](useKryo: Boolean): Encoder[T] = {
     ExpressionEncoder[T](
       schema = new StructType().add("value", BinaryType),
       flat = true,
-      toRowExpressions = Seq(ser),
-      fromRowExpression = deser,
+      toRowExpressions = Seq(
+        EncodeUsingSerializer(
+          BoundReference(0, ObjectType(classOf[AnyRef]), nullable = true), kryo = useKryo)),
+      fromRowExpression =
+        DecodeUsingSerializer[T](
+          BoundReference(0, BinaryType, nullable = true), classTag[T], kryo = useKryo),
       clsTag = classTag[T]
     )
   }
 
+  /**
+   * (Scala-specific) Creates an encoder that serializes objects of type T using Kryo.
+   * This encoder maps T into a single byte array (binary) field.
+   */
+  def kryo[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = true)
+
   /**
    * Creates an encoder that serializes objects of type T using Kryo.
    * This encoder maps T into a single byte array (binary) field.
    */
   def kryo[T](clazz: Class[T]): Encoder[T] = kryo(ClassTag[T](clazz))
 
+  /**
+   * (Scala-specific) Creates an encoder that serializes objects of type T using generic Java
+   * serialization. This encoder maps T into a single byte array (binary) field.
+   *
+   * Note that this is extremely inefficient and should only be used as the last resort.
+   */
+  def javaSerialization[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = false)
+
+  /**
+   * Creates an encoder that serializes objects of type T using generic Java serialization.
+   * This encoder maps T into a single byte array (binary) field.
+   *
+   * Note that this is extremely inefficient and should only be used as the last resort.
+   */
+  def javaSerialization[T](clazz: Class[T]): Encoder[T] = javaSerialization(ClassTag[T](clazz))
+
   def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
   def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
   def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 489c6126f8cd..acf0da240051 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -21,7 +21,7 @@ import scala.language.existentials
 import scala.reflect.ClassTag
 
 import org.apache.spark.SparkConf
-import org.apache.spark.serializer.{KryoSerializerInstance, KryoSerializer}
+import org.apache.spark.serializer._
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
@@ -517,29 +517,39 @@ case class GetInternalRowField(child: Expression, ordinal: Int, dataType: DataTy
   }
 }
 
-/** Serializes an input object using Kryo serializer. */
-case class SerializeWithKryo(child: Expression) extends UnaryExpression {
+/**
+ * Serializes an input object using a generic serializer (Kryo or Java).
+ * @param kryo if true, use Kryo. Otherwise, use Java.
+ */
+case class EncodeUsingSerializer(child: Expression, kryo: Boolean) extends UnaryExpression {
 
   override def eval(input: InternalRow): Any =
     throw new UnsupportedOperationException("Only code-generated evaluation is supported")
 
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val input = child.gen(ctx)
-    val kryo = ctx.freshName("kryoSerializer")
-    val kryoClass = classOf[KryoSerializer].getName
-    val kryoInstanceClass = classOf[KryoSerializerInstance].getName
-    val sparkConfClass = classOf[SparkConf].getName
+    // Code to initialize the serializer.
+    val serializer = ctx.freshName("serializer")
+    val (serializerClass, serializerInstanceClass) = {
+      if (kryo) {
+        (classOf[KryoSerializer].getName, classOf[KryoSerializerInstance].getName)
+      } else {
+        (classOf[JavaSerializer].getName, classOf[JavaSerializerInstance].getName)
+      }
+    }
+    val sparkConf = s"new ${classOf[SparkConf].getName}()"
     ctx.addMutableState(
-      kryoInstanceClass,
-      kryo,
-      s"$kryo = ($kryoInstanceClass) new $kryoClass(new $sparkConfClass()).newInstance();")
+      serializerInstanceClass,
+      serializer,
+      s"$serializer = ($serializerInstanceClass) new $serializerClass($sparkConf).newInstance();")
 
+    // Code to serialize.
+    val input = child.gen(ctx)
     s"""
       ${input.code}
       final boolean ${ev.isNull} = ${input.isNull};
       ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${ev.isNull}) {
-        ${ev.value} = $kryo.serialize(${input.value}, null).array();
+        ${ev.value} = $serializer.serialize(${input.value}, null).array();
       }
      """
   }
@@ -548,29 +558,38 @@ case class SerializeWithKryo(child: Expression) extends UnaryExpression {
 }
 
 /**
- * Deserializes an input object using Kryo serializer. Note that the ClassTag is not an implicit
- * parameter because TreeNode cannot copy implicit parameters.
+ * Serializes an input object using a generic serializer (Kryo or Java).  Note that the ClassTag
+ * is not an implicit parameter because TreeNode cannot copy implicit parameters.
+ * @param kryo if true, use Kryo. Otherwise, use Java.
  */
-case class DeserializeWithKryo[T](child: Expression, tag: ClassTag[T]) extends UnaryExpression {
+case class DecodeUsingSerializer[T](child: Expression, tag: ClassTag[T], kryo: Boolean)
+  extends UnaryExpression {
 
   override protected def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val input = child.gen(ctx)
-    val kryo = ctx.freshName("kryoSerializer")
-    val kryoClass = classOf[KryoSerializer].getName
-    val kryoInstanceClass = classOf[KryoSerializerInstance].getName
-    val sparkConfClass = classOf[SparkConf].getName
+    // Code to initialize the serializer.
+    val serializer = ctx.freshName("serializer")
+    val (serializerClass, serializerInstanceClass) = {
+      if (kryo) {
+        (classOf[KryoSerializer].getName, classOf[KryoSerializerInstance].getName)
+      } else {
+        (classOf[JavaSerializer].getName, classOf[JavaSerializerInstance].getName)
+      }
+    }
+    val sparkConf = s"new ${classOf[SparkConf].getName}()"
     ctx.addMutableState(
-      kryoInstanceClass,
-      kryo,
-      s"$kryo = ($kryoInstanceClass) new $kryoClass(new $sparkConfClass()).newInstance();")
+      serializerInstanceClass,
+      serializer,
+      s"$serializer = ($serializerInstanceClass) new $serializerClass($sparkConf).newInstance();")
 
+    // Code to serialize.
+    val input = child.gen(ctx)
     s"""
       ${input.code}
       final boolean ${ev.isNull} = ${input.isNull};
       ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
       if (!${ev.isNull}) {
         ${ev.value} = (${ctx.javaType(dataType)})
-          $kryo.deserialize(java.nio.ByteBuffer.wrap(${input.value}), null);
+          $serializer.deserialize(java.nio.ByteBuffer.wrap(${input.value}), null);
       }
      """
   }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
index 2729db84897a..6e0322fb6e01 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
@@ -76,17 +76,34 @@ class FlatEncoderSuite extends ExpressionEncoderSuite {
   // Kryo encoders
   encodeDecodeTest(
     "hello",
-    Encoders.kryo[String].asInstanceOf[ExpressionEncoder[String]],
+    encoderFor(Encoders.kryo[String]),
     "kryo string")
   encodeDecodeTest(
-    new NotJavaSerializable(15),
-    Encoders.kryo[NotJavaSerializable].asInstanceOf[ExpressionEncoder[NotJavaSerializable]],
+    new KryoSerializable(15),
+    encoderFor(Encoders.kryo[KryoSerializable]),
     "kryo object serialization")
+
+  // Java encoders
+  encodeDecodeTest(
+    "hello",
+    encoderFor(Encoders.javaSerialization[String]),
+    "java string")
+  encodeDecodeTest(
+    new JavaSerializable(15),
+    encoderFor(Encoders.javaSerialization[JavaSerializable]),
+    "java object serialization")
 }
 
+/** For testing Kryo serialization based encoder. */
+class KryoSerializable(val value: Int) {
+  override def equals(other: Any): Boolean = {
+    this.value == other.asInstanceOf[KryoSerializable].value
+  }
+}
 
-class NotJavaSerializable(val value: Int) {
+/** For testing Java serialization based encoder. */
+class JavaSerializable(val value: Int) extends Serializable {
   override def equals(other: Any): Boolean = {
-    this.value == other.asInstanceOf[NotJavaSerializable].value
+    this.value == other.asInstanceOf[JavaSerializable].value
   }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index b6db583dfe01..89d964aa3e46 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -357,7 +357,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     assert(ds.toString == "[_1: int, _2: int]")
   }
 
-  test("kryo encoder") {
+  test("Kryo encoder") {
     implicit val kryoEncoder = Encoders.kryo[KryoData]
     val ds = Seq(KryoData(1), KryoData(2)).toDS()
 
@@ -365,7 +365,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       Seq((KryoData(1), 1L), (KryoData(2), 1L)))
   }
 
-  test("kryo encoder self join") {
+  test("Kryo encoder self join") {
     implicit val kryoEncoder = Encoders.kryo[KryoData]
     val ds = Seq(KryoData(1), KryoData(2)).toDS()
     assert(ds.joinWith(ds, lit(true)).collect().toSet ==
@@ -375,6 +375,25 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
         (KryoData(2), KryoData(1)),
         (KryoData(2), KryoData(2))))
   }
+
+  test("Java encoder") {
+    implicit val kryoEncoder = Encoders.javaSerialization[JavaData]
+    val ds = Seq(JavaData(1), JavaData(2)).toDS()
+
+    assert(ds.groupBy(p => p).count().collect().toSeq ==
+      Seq((JavaData(1), 1L), (JavaData(2), 1L)))
+  }
+
+  ignore("Java encoder self join") {
+    implicit val kryoEncoder = Encoders.javaSerialization[JavaData]
+    val ds = Seq(JavaData(1), JavaData(2)).toDS()
+    assert(ds.joinWith(ds, lit(true)).collect().toSet ==
+      Set(
+        (JavaData(1), JavaData(1)),
+        (JavaData(1), JavaData(2)),
+        (JavaData(2), JavaData(1)),
+        (JavaData(2), JavaData(2))))
+  }
 }
 
 
@@ -406,3 +425,16 @@ class KryoData(val a: Int) {
 object KryoData {
   def apply(a: Int): KryoData = new KryoData(a)
 }
+
+/** Used to test Java encoder. */
+class JavaData(val a: Int) extends Serializable {
+  override def equals(other: Any): Boolean = {
+    a == other.asInstanceOf[JavaData].a
+  }
+  override def hashCode: Int = a
+  override def toString: String = s"JavaData($a)"
+}
+
+object JavaData {
+  def apply(a: Int): JavaData = new JavaData(a)
+}

From 7e987de1770f4ab3d54bc05db8de0a1ef035941d Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Wed, 18 Nov 2015 15:47:49 -0800
Subject: [PATCH 781/896] [SPARK-6787][ML] add read/write to estimators under
 ml.feature (1)

Add read/write support to the following estimators under spark.ml:

* CountVectorizer
* IDF
* MinMaxScaler
* StandardScaler (a little awkward because we store some params in spark.mllib model)
* StringIndexer

Added some necessary method for read/write. Maybe we should add `private[ml] trait DefaultParamsReadable` and `DefaultParamsWritable` to save some boilerplate code, though we still need to override `load` for Java compatibility.

jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9798 from mengxr/SPARK-6787.
---
 .../spark/ml/feature/CountVectorizer.scala    | 72 +++++++++++++++--
 .../org/apache/spark/ml/feature/IDF.scala     | 71 ++++++++++++++++-
 .../spark/ml/feature/MinMaxScaler.scala       | 72 +++++++++++++++--
 .../spark/ml/feature/StandardScaler.scala     | 78 ++++++++++++++++++-
 .../spark/ml/feature/StringIndexer.scala      | 70 +++++++++++++++--
 .../ml/feature/CountVectorizerSuite.scala     | 24 +++++-
 .../apache/spark/ml/feature/IDFSuite.scala    | 19 ++++-
 .../spark/ml/feature/MinMaxScalerSuite.scala  | 25 +++++-
 .../ml/feature/StandardScalerSuite.scala      | 64 +++++++++++----
 .../spark/ml/feature/StringIndexerSuite.scala | 19 ++++-
 10 files changed, 467 insertions(+), 47 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
index 49028e4b8506..5ff9bfb7d111 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
@@ -16,17 +16,19 @@
  */
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.broadcast.Broadcast
+import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
-import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.{VectorUDT, Vectors}
 import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.DataFrame
 import org.apache.spark.util.collection.OpenHashMap
 
 /**
@@ -105,7 +107,7 @@ private[feature] trait CountVectorizerParams extends Params with HasInputCol wit
  */
 @Experimental
 class CountVectorizer(override val uid: String)
-  extends Estimator[CountVectorizerModel] with CountVectorizerParams {
+  extends Estimator[CountVectorizerModel] with CountVectorizerParams with Writable {
 
   def this() = this(Identifiable.randomUID("cntVec"))
 
@@ -169,6 +171,19 @@ class CountVectorizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): CountVectorizer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object CountVectorizer extends Readable[CountVectorizer] {
+
+  @Since("1.6.0")
+  override def read: Reader[CountVectorizer] = new DefaultParamsReader
+
+  @Since("1.6.0")
+  override def load(path: String): CountVectorizer = super.load(path)
 }
 
 /**
@@ -178,7 +193,9 @@ class CountVectorizer(override val uid: String)
  */
 @Experimental
 class CountVectorizerModel(override val uid: String, val vocabulary: Array[String])
-  extends Model[CountVectorizerModel] with CountVectorizerParams {
+  extends Model[CountVectorizerModel] with CountVectorizerParams with Writable {
+
+  import CountVectorizerModel._
 
   def this(vocabulary: Array[String]) = {
     this(Identifiable.randomUID("cntVecModel"), vocabulary)
@@ -232,4 +249,47 @@ class CountVectorizerModel(override val uid: String, val vocabulary: Array[Strin
     val copied = new CountVectorizerModel(uid, vocabulary).setParent(parent)
     copyValues(copied, extra)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new CountVectorizerModelWriter(this)
+}
+
+@Since("1.6.0")
+object CountVectorizerModel extends Readable[CountVectorizerModel] {
+
+  private[CountVectorizerModel]
+  class CountVectorizerModelWriter(instance: CountVectorizerModel) extends Writer {
+
+    private case class Data(vocabulary: Seq[String])
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.vocabulary)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class CountVectorizerModelReader extends Reader[CountVectorizerModel] {
+
+    private val className = "org.apache.spark.ml.feature.CountVectorizerModel"
+
+    override def load(path: String): CountVectorizerModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("vocabulary")
+        .head()
+      val vocabulary = data.getAs[Seq[String]](0).toArray
+      val model = new CountVectorizerModel(metadata.uid, vocabulary)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: Reader[CountVectorizerModel] = new CountVectorizerModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): CountVectorizerModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
index 4c36df75d8aa..53ad34ef1264 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
@@ -17,11 +17,13 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml._
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
 import org.apache.spark.sql._
@@ -60,7 +62,7 @@ private[feature] trait IDFBase extends Params with HasInputCol with HasOutputCol
  * Compute the Inverse Document Frequency (IDF) given a collection of documents.
  */
 @Experimental
-final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBase {
+final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBase with Writable {
 
   def this() = this(Identifiable.randomUID("idf"))
 
@@ -85,6 +87,19 @@ final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBa
   }
 
   override def copy(extra: ParamMap): IDF = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object IDF extends Readable[IDF] {
+
+  @Since("1.6.0")
+  override def read: Reader[IDF] = new DefaultParamsReader
+
+  @Since("1.6.0")
+  override def load(path: String): IDF = super.load(path)
 }
 
 /**
@@ -95,7 +110,9 @@ final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBa
 class IDFModel private[ml] (
     override val uid: String,
     idfModel: feature.IDFModel)
-  extends Model[IDFModel] with IDFBase {
+  extends Model[IDFModel] with IDFBase with Writable {
+
+  import IDFModel._
 
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
@@ -117,4 +134,50 @@ class IDFModel private[ml] (
     val copied = new IDFModel(uid, idfModel)
     copyValues(copied, extra).setParent(parent)
   }
+
+  /** Returns the IDF vector. */
+  @Since("1.6.0")
+  def idf: Vector = idfModel.idf
+
+  @Since("1.6.0")
+  override def write: Writer = new IDFModelWriter(this)
+}
+
+@Since("1.6.0")
+object IDFModel extends Readable[IDFModel] {
+
+  private[IDFModel] class IDFModelWriter(instance: IDFModel) extends Writer {
+
+    private case class Data(idf: Vector)
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.idf)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class IDFModelReader extends Reader[IDFModel] {
+
+    private val className = "org.apache.spark.ml.feature.IDFModel"
+
+    override def load(path: String): IDFModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("idf")
+        .head()
+      val idf = data.getAs[Vector](0)
+      val model = new IDFModel(metadata.uid, new feature.IDFModel(idf))
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: Reader[IDFModel] = new IDFModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): IDFModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
index 1b494ec8b172..24d964fae834 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
@@ -17,11 +17,14 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
-import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
-import org.apache.spark.ml.param.{ParamMap, DoubleParam, Params}
-import org.apache.spark.ml.util.Identifiable
+
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.ml.param.{DoubleParam, ParamMap, Params}
+import org.apache.spark.ml.param.shared.{HasInputCol, HasOutputCol}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
 import org.apache.spark.mllib.stat.Statistics
 import org.apache.spark.sql._
@@ -85,7 +88,7 @@ private[feature] trait MinMaxScalerParams extends Params with HasInputCol with H
  */
 @Experimental
 class MinMaxScaler(override val uid: String)
-  extends Estimator[MinMaxScalerModel] with MinMaxScalerParams {
+  extends Estimator[MinMaxScalerModel] with MinMaxScalerParams with Writable {
 
   def this() = this(Identifiable.randomUID("minMaxScal"))
 
@@ -115,6 +118,19 @@ class MinMaxScaler(override val uid: String)
   }
 
   override def copy(extra: ParamMap): MinMaxScaler = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object MinMaxScaler extends Readable[MinMaxScaler] {
+
+  @Since("1.6.0")
+  override def read: Reader[MinMaxScaler] = new DefaultParamsReader
+
+  @Since("1.6.0")
+  override def load(path: String): MinMaxScaler = super.load(path)
 }
 
 /**
@@ -131,7 +147,9 @@ class MinMaxScalerModel private[ml] (
     override val uid: String,
     val originalMin: Vector,
     val originalMax: Vector)
-  extends Model[MinMaxScalerModel] with MinMaxScalerParams {
+  extends Model[MinMaxScalerModel] with MinMaxScalerParams with Writable {
+
+  import MinMaxScalerModel._
 
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
@@ -175,4 +193,46 @@ class MinMaxScalerModel private[ml] (
     val copied = new MinMaxScalerModel(uid, originalMin, originalMax)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new MinMaxScalerModelWriter(this)
+}
+
+@Since("1.6.0")
+object MinMaxScalerModel extends Readable[MinMaxScalerModel] {
+
+  private[MinMaxScalerModel]
+  class MinMaxScalerModelWriter(instance: MinMaxScalerModel) extends Writer {
+
+    private case class Data(originalMin: Vector, originalMax: Vector)
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = new Data(instance.originalMin, instance.originalMax)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class MinMaxScalerModelReader extends Reader[MinMaxScalerModel] {
+
+    private val className = "org.apache.spark.ml.feature.MinMaxScalerModel"
+
+    override def load(path: String): MinMaxScalerModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val Row(originalMin: Vector, originalMax: Vector) = sqlContext.read.parquet(dataPath)
+        .select("originalMin", "originalMax")
+        .head()
+      val model = new MinMaxScalerModel(metadata.uid, originalMin, originalMax)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: Reader[MinMaxScalerModel] = new MinMaxScalerModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): MinMaxScalerModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
index f6d0b0c0e9e7..ab04e5418dd4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
@@ -17,11 +17,13 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml._
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
 import org.apache.spark.sql._
@@ -57,7 +59,7 @@ private[feature] trait StandardScalerParams extends Params with HasInputCol with
  */
 @Experimental
 class StandardScaler(override val uid: String) extends Estimator[StandardScalerModel]
-  with StandardScalerParams {
+  with StandardScalerParams with Writable {
 
   def this() = this(Identifiable.randomUID("stdScal"))
 
@@ -94,6 +96,19 @@ class StandardScaler(override val uid: String) extends Estimator[StandardScalerM
   }
 
   override def copy(extra: ParamMap): StandardScaler = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object StandardScaler extends Readable[StandardScaler] {
+
+  @Since("1.6.0")
+  override def read: Reader[StandardScaler] = new DefaultParamsReader
+
+  @Since("1.6.0")
+  override def load(path: String): StandardScaler = super.load(path)
 }
 
 /**
@@ -104,7 +119,9 @@ class StandardScaler(override val uid: String) extends Estimator[StandardScalerM
 class StandardScalerModel private[ml] (
     override val uid: String,
     scaler: feature.StandardScalerModel)
-  extends Model[StandardScalerModel] with StandardScalerParams {
+  extends Model[StandardScalerModel] with StandardScalerParams with Writable {
+
+  import StandardScalerModel._
 
   /** Standard deviation of the StandardScalerModel */
   val std: Vector = scaler.std
@@ -112,6 +129,14 @@ class StandardScalerModel private[ml] (
   /** Mean of the StandardScalerModel */
   val mean: Vector = scaler.mean
 
+  /** Whether to scale to unit standard deviation. */
+  @Since("1.6.0")
+  def getWithStd: Boolean = scaler.withStd
+
+  /** Whether to center data with mean. */
+  @Since("1.6.0")
+  def getWithMean: Boolean = scaler.withMean
+
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
 
@@ -138,4 +163,49 @@ class StandardScalerModel private[ml] (
     val copied = new StandardScalerModel(uid, scaler)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: Writer = new StandardScalerModelWriter(this)
+}
+
+@Since("1.6.0")
+object StandardScalerModel extends Readable[StandardScalerModel] {
+
+  private[StandardScalerModel]
+  class StandardScalerModelWriter(instance: StandardScalerModel) extends Writer {
+
+    private case class Data(std: Vector, mean: Vector, withStd: Boolean, withMean: Boolean)
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.std, instance.mean, instance.getWithStd, instance.getWithMean)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class StandardScalerModelReader extends Reader[StandardScalerModel] {
+
+    private val className = "org.apache.spark.ml.feature.StandardScalerModel"
+
+    override def load(path: String): StandardScalerModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val Row(std: Vector, mean: Vector, withStd: Boolean, withMean: Boolean) =
+        sqlContext.read.parquet(dataPath)
+          .select("std", "mean", "withStd", "withMean")
+          .head()
+      // This is very likely to change in the future because withStd and withMean should be params.
+      val oldModel = new feature.StandardScalerModel(std, mean, withStd, withMean)
+      val model = new StandardScalerModel(metadata.uid, oldModel)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: Reader[StandardScalerModel] = new StandardScalerModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): StandardScalerModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
index f782a272d11d..f16f6afc002d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
@@ -17,13 +17,14 @@
 
 package org.apache.spark.ml.feature
 
+import org.apache.hadoop.fs.Path
+
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.{Since, Experimental}
-import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.annotation.{Experimental, Since}
+import org.apache.spark.ml.{Estimator, Model, Transformer}
 import org.apache.spark.ml.attribute.{Attribute, NominalAttribute}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.Transformer
 import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.functions._
@@ -64,7 +65,7 @@ private[feature] trait StringIndexerBase extends Params with HasInputCol with Ha
  */
 @Experimental
 class StringIndexer(override val uid: String) extends Estimator[StringIndexerModel]
-  with StringIndexerBase {
+  with StringIndexerBase with Writable {
 
   def this() = this(Identifiable.randomUID("strIdx"))
 
@@ -92,6 +93,19 @@ class StringIndexer(override val uid: String) extends Estimator[StringIndexerMod
   }
 
   override def copy(extra: ParamMap): StringIndexer = defaultCopy(extra)
+
+  @Since("1.6.0")
+  override def write: Writer = new DefaultParamsWriter(this)
+}
+
+@Since("1.6.0")
+object StringIndexer extends Readable[StringIndexer] {
+
+  @Since("1.6.0")
+  override def read: Reader[StringIndexer] = new DefaultParamsReader
+
+  @Since("1.6.0")
+  override def load(path: String): StringIndexer = super.load(path)
 }
 
 /**
@@ -107,7 +121,10 @@ class StringIndexer(override val uid: String) extends Estimator[StringIndexerMod
 @Experimental
 class StringIndexerModel (
     override val uid: String,
-    val labels: Array[String]) extends Model[StringIndexerModel] with StringIndexerBase {
+    val labels: Array[String])
+  extends Model[StringIndexerModel] with StringIndexerBase with Writable {
+
+  import StringIndexerModel._
 
   def this(labels: Array[String]) = this(Identifiable.randomUID("strIdx"), labels)
 
@@ -176,6 +193,49 @@ class StringIndexerModel (
     val copied = new StringIndexerModel(uid, labels)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: StringIndexModelWriter = new StringIndexModelWriter(this)
+}
+
+@Since("1.6.0")
+object StringIndexerModel extends Readable[StringIndexerModel] {
+
+  private[StringIndexerModel]
+  class StringIndexModelWriter(instance: StringIndexerModel) extends Writer {
+
+    private case class Data(labels: Array[String])
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.labels)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class StringIndexerModelReader extends Reader[StringIndexerModel] {
+
+    private val className = "org.apache.spark.ml.feature.StringIndexerModel"
+
+    override def load(path: String): StringIndexerModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("labels")
+        .head()
+      val labels = data.getAs[Seq[String]](0).toArray
+      val model = new StringIndexerModel(metadata.uid, labels)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: Reader[StringIndexerModel] = new StringIndexerModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): StringIndexerModel = super.load(path)
 }
 
 /**
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/CountVectorizerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/CountVectorizerSuite.scala
index e192fa4850af..9c9999017317 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/CountVectorizerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/CountVectorizerSuite.scala
@@ -18,14 +18,17 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.Row
 
-class CountVectorizerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class CountVectorizerSuite extends SparkFunSuite with MLlibTestSparkContext
+  with DefaultReadWriteTest {
 
   test("params") {
+    ParamsSuite.checkParams(new CountVectorizer)
     ParamsSuite.checkParams(new CountVectorizerModel(Array("empty")))
   }
 
@@ -164,4 +167,23 @@ class CountVectorizerSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(features ~== expected absTol 1e-14)
     }
   }
+
+  test("CountVectorizer read/write") {
+    val t = new CountVectorizer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMinDF(0.5)
+      .setMinTF(3.0)
+      .setVocabSize(10)
+    testDefaultReadWrite(t)
+  }
+
+  test("CountVectorizerModel read/write") {
+    val instance = new CountVectorizerModel("myCountVectorizerModel", Array("a", "b", "c"))
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMinTF(3.0)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.vocabulary === instance.vocabulary)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/IDFSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/IDFSuite.scala
index 08f80af03429..bc958c15857b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/IDFSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/IDFSuite.scala
@@ -19,13 +19,14 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.feature.{IDFModel => OldIDFModel}
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.Row
 
-class IDFSuite extends SparkFunSuite with MLlibTestSparkContext {
+class IDFSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   def scaleDataWithIDF(dataSet: Array[Vector], model: Vector): Array[Vector] = {
     dataSet.map {
@@ -98,4 +99,20 @@ class IDFSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(x ~== y absTol 1e-5, "Transformed vector is different with expected vector.")
     }
   }
+
+  test("IDF read/write") {
+    val t = new IDF()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMinDocFreq(5)
+    testDefaultReadWrite(t)
+  }
+
+  test("IDFModel read/write") {
+    val instance = new IDFModel("myIDFModel", new OldIDFModel(Vectors.dense(1.0, 2.0)))
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.idf === instance.idf)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/MinMaxScalerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/MinMaxScalerSuite.scala
index c04dda41eea3..09183fe65b72 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/MinMaxScalerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/MinMaxScalerSuite.scala
@@ -18,12 +18,12 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{Row, SQLContext}
 
-class MinMaxScalerSuite extends SparkFunSuite with MLlibTestSparkContext {
+class MinMaxScalerSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("MinMaxScaler fit basic case") {
     val sqlContext = new SQLContext(sc)
@@ -69,4 +69,25 @@ class MinMaxScalerSuite extends SparkFunSuite with MLlibTestSparkContext {
       }
     }
   }
+
+  test("MinMaxScaler read/write") {
+    val t = new MinMaxScaler()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMax(1.0)
+      .setMin(-1.0)
+    testDefaultReadWrite(t)
+  }
+
+  test("MinMaxScalerModel read/write") {
+    val instance = new MinMaxScalerModel(
+        "myMinMaxScalerModel", Vectors.dense(-1.0, 0.0), Vectors.dense(1.0, 10.0))
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMin(-1.0)
+      .setMax(1.0)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.originalMin === instance.originalMin)
+    assert(newInstance.originalMax === instance.originalMax)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
index 879a3ae87500..49a4b2efe0c2 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
@@ -19,12 +19,16 @@ package org.apache.spark.ml.feature
 
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, Vectors}
+import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
+import org.apache.spark.mllib.feature
+import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
-import org.apache.spark.sql.{DataFrame, Row, SQLContext}
+import org.apache.spark.sql.{DataFrame, Row}
 
-class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext{
+class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext
+  with DefaultReadWriteTest {
 
   @transient var data: Array[Vector] = _
   @transient var resWithStd: Array[Vector] = _
@@ -56,23 +60,29 @@ class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext{
     )
   }
 
-  def assertResult(dataframe: DataFrame): Unit = {
-    dataframe.select("standarded_features", "expected").collect().foreach {
+  def assertResult(df: DataFrame): Unit = {
+    df.select("standardized_features", "expected").collect().foreach {
       case Row(vector1: Vector, vector2: Vector) =>
         assert(vector1 ~== vector2 absTol 1E-5,
           "The vector value is not correct after standardization.")
     }
   }
 
+  test("params") {
+    ParamsSuite.checkParams(new StandardScaler)
+    val oldModel = new feature.StandardScalerModel(Vectors.dense(1.0), Vectors.dense(2.0))
+    ParamsSuite.checkParams(new StandardScalerModel("empty", oldModel))
+  }
+
   test("Standardization with default parameter") {
     val df0 = sqlContext.createDataFrame(data.zip(resWithStd)).toDF("features", "expected")
 
-    val standardscaler0 = new StandardScaler()
+    val standardScaler0 = new StandardScaler()
       .setInputCol("features")
-      .setOutputCol("standarded_features")
+      .setOutputCol("standardized_features")
       .fit(df0)
 
-    assertResult(standardscaler0.transform(df0))
+    assertResult(standardScaler0.transform(df0))
   }
 
   test("Standardization with setter") {
@@ -80,29 +90,49 @@ class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext{
     val df2 = sqlContext.createDataFrame(data.zip(resWithMean)).toDF("features", "expected")
     val df3 = sqlContext.createDataFrame(data.zip(data)).toDF("features", "expected")
 
-    val standardscaler1 = new StandardScaler()
+    val standardScaler1 = new StandardScaler()
       .setInputCol("features")
-      .setOutputCol("standarded_features")
+      .setOutputCol("standardized_features")
       .setWithMean(true)
       .setWithStd(true)
       .fit(df1)
 
-    val standardscaler2 = new StandardScaler()
+    val standardScaler2 = new StandardScaler()
       .setInputCol("features")
-      .setOutputCol("standarded_features")
+      .setOutputCol("standardized_features")
       .setWithMean(true)
       .setWithStd(false)
       .fit(df2)
 
-    val standardscaler3 = new StandardScaler()
+    val standardScaler3 = new StandardScaler()
       .setInputCol("features")
-      .setOutputCol("standarded_features")
+      .setOutputCol("standardized_features")
       .setWithMean(false)
       .setWithStd(false)
       .fit(df3)
 
-    assertResult(standardscaler1.transform(df1))
-    assertResult(standardscaler2.transform(df2))
-    assertResult(standardscaler3.transform(df3))
+    assertResult(standardScaler1.transform(df1))
+    assertResult(standardScaler2.transform(df2))
+    assertResult(standardScaler3.transform(df3))
+  }
+
+  test("StandardScaler read/write") {
+    val t = new StandardScaler()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setWithStd(false)
+      .setWithMean(true)
+    testDefaultReadWrite(t)
+  }
+
+  test("StandardScalerModel read/write") {
+    val oldModel = new feature.StandardScalerModel(
+      Vectors.dense(1.0, 2.0), Vectors.dense(3.0, 4.0), false, true)
+    val instance = new StandardScalerModel("myStandardScalerModel", oldModel)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.std === instance.std)
+    assert(newInstance.mean === instance.mean)
+    assert(newInstance.getWithStd === instance.getWithStd)
+    assert(newInstance.getWithMean === instance.getWithMean)
   }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
index be37bfb43883..749bfac74782 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StringIndexerSuite.scala
@@ -118,6 +118,23 @@ class StringIndexerSuite
     assert(indexerModel.transform(df).eq(df))
   }
 
+  test("StringIndexer read/write") {
+    val t = new StringIndexer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setHandleInvalid("skip")
+    testDefaultReadWrite(t)
+  }
+
+  test("StringIndexerModel read/write") {
+    val instance = new StringIndexerModel("myStringIndexerModel", Array("a", "b", "c"))
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setHandleInvalid("skip")
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.labels === instance.labels)
+  }
+
   test("IndexToString params") {
     val idxToStr = new IndexToString()
     ParamsSuite.checkParams(idxToStr)
@@ -175,7 +192,7 @@ class StringIndexerSuite
     assert(outSchema("output").dataType === StringType)
   }
 
-  test("read/write") {
+  test("IndexToString read/write") {
     val t = new IndexToString()
       .setInputCol("myInputCol")
       .setOutputCol("myOutputCol")

From 3a9851936ddfe5bcb6a7f364d535fac977551f5d Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 18 Nov 2015 15:55:41 -0800
Subject: [PATCH 782/896] [SPARK-11649] Properly set Akka frame size in
 SparkListenerSuite test

SparkListenerSuite's _"onTaskGettingResult() called when result fetched remotely"_ test was extremely slow (1 to 4 minutes to run) and recently became extremely flaky, frequently failing with OutOfMemoryError.

The root cause was the fact that this was using `System.setProperty` to set the Akka frame size, which was not actually modifying the frame size. As a result, this test would allocate much more data than necessary. The fix here is to simply use SparkConf in order to configure the frame size.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9822 from JoshRosen/SPARK-11649.
---
 .../org/apache/spark/scheduler/SparkListenerSuite.scala      | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
index 53102b9f1c93..84e545851f49 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
@@ -269,14 +269,15 @@ class SparkListenerSuite extends SparkFunSuite with LocalSparkContext with Match
   }
 
   test("onTaskGettingResult() called when result fetched remotely") {
-    sc = new SparkContext("local", "SparkListenerSuite")
+    val conf = new SparkConf().set("spark.akka.frameSize", "1")
+    sc = new SparkContext("local", "SparkListenerSuite", conf)
     val listener = new SaveTaskEvents
     sc.addSparkListener(listener)
 
     // Make a task whose result is larger than the akka frame size
-    System.setProperty("spark.akka.frameSize", "1")
     val akkaFrameSize =
       sc.env.actorSystem.settings.config.getBytes("akka.remote.netty.tcp.maximum-frame-size").toInt
+    assert(akkaFrameSize === 1024 * 1024)
     val result = sc.parallelize(Seq(1), 1)
       .map { x => 1.to(akkaFrameSize).toArray }
       .reduce { case (x, y) => x }

From c07a50b86254578625be777b1890ff95e832ac6e Mon Sep 17 00:00:00 2001
From: Derek Dagit <derekd@yahoo-inc.com>
Date: Wed, 18 Nov 2015 15:56:54 -0800
Subject: [PATCH 783/896] [SPARK-10930] History "Stages" page "duration" can be
 confusing

Author: Derek Dagit <derekd@yahoo-inc.com>

Closes #9051 from d2r/spark-10930-ui-max-task-dur.
---
 .../org/apache/spark/ui/jobs/StageTable.scala | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
index ea806d09b600..2a1c3c1a50ec 100644
--- a/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
+++ b/core/src/main/scala/org/apache/spark/ui/jobs/StageTable.scala
@@ -145,9 +145,22 @@ private[ui] class StageTableBase(
       case None => "Unknown"
     }
     val finishTime = s.completionTime.getOrElse(System.currentTimeMillis)
-    val duration = s.submissionTime.map { t =>
-      if (finishTime > t) finishTime - t else System.currentTimeMillis - t
-    }
+
+    // The submission time for a stage is misleading because it counts the time
+    // the stage waits to be launched. (SPARK-10930)
+    val taskLaunchTimes =
+      stageData.taskData.values.map(_.taskInfo.launchTime).filter(_ > 0)
+    val duration: Option[Long] =
+      if (taskLaunchTimes.nonEmpty) {
+        val startTime = taskLaunchTimes.min
+        if (finishTime > startTime) {
+          Some(finishTime - startTime)
+        } else {
+          Some(System.currentTimeMillis() - startTime)
+        }
+      } else {
+        None
+      }
     val formattedDuration = duration.map(d => UIUtils.formatDuration(d)).getOrElse("Unknown")
 
     val inputRead = stageData.inputBytes

From 4b117121900e5f242e7c8f46a69164385f0da7cc Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Wed, 18 Nov 2015 16:00:35 -0800
Subject: [PATCH 784/896] [SPARK-11495] Fix potential socket / file handle
 leaks that were found via static analysis

The HP Fortify Opens Source Review team (https://www.hpfod.com/open-source-review-project) reported a handful of potential resource leaks that were discovered using their static analysis tool. We should fix the issues identified by their scan.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9455 from JoshRosen/fix-potential-resource-leaks.
---
 .../spark/unsafe/map/BytesToBytesMap.java     |  7 ++++
 .../unsafe/sort/UnsafeSorterSpillReader.java  | 38 +++++++++++--------
 .../streaming/JavaCustomReceiver.java         | 31 +++++++--------
 .../network/ChunkFetchIntegrationSuite.java   | 15 ++++++--
 .../shuffle/TestShuffleDataContext.java       | 32 ++++++++++------
 .../spark/streaming/JavaReceiverAPISuite.java | 20 ++++++----
 6 files changed, 90 insertions(+), 53 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index 04694dc54418..3387f9a4177c 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -24,6 +24,7 @@
 import java.util.LinkedList;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.io.Closeables;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -272,6 +273,7 @@ private void advanceToNextPage() {
             }
           }
           try {
+            Closeables.close(reader, /* swallowIOException = */ false);
             reader = spillWriters.getFirst().getReader(blockManager);
             recordsInPage = -1;
           } catch (IOException e) {
@@ -318,6 +320,11 @@ public Location next() {
         try {
           reader.loadNext();
         } catch (IOException e) {
+          try {
+            reader.close();
+          } catch(IOException e2) {
+            logger.error("Error while closing spill reader", e2);
+          }
           // Scala iterator does not handle exception
           Platform.throwException(e);
         }
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
index 039e940a357e..dcb13e6581e5 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillReader.java
@@ -20,8 +20,7 @@
 import java.io.*;
 
 import com.google.common.io.ByteStreams;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+import com.google.common.io.Closeables;
 
 import org.apache.spark.storage.BlockId;
 import org.apache.spark.storage.BlockManager;
@@ -31,10 +30,8 @@
  * Reads spill files written by {@link UnsafeSorterSpillWriter} (see that class for a description
  * of the file format).
  */
-public final class UnsafeSorterSpillReader extends UnsafeSorterIterator {
-  private static final Logger logger = LoggerFactory.getLogger(UnsafeSorterSpillReader.class);
+public final class UnsafeSorterSpillReader extends UnsafeSorterIterator implements Closeable {
 
-  private final File file;
   private InputStream in;
   private DataInputStream din;
 
@@ -52,11 +49,15 @@ public UnsafeSorterSpillReader(
       File file,
       BlockId blockId) throws IOException {
     assert (file.length() > 0);
-    this.file = file;
     final BufferedInputStream bs = new BufferedInputStream(new FileInputStream(file));
-    this.in = blockManager.wrapForCompression(blockId, bs);
-    this.din = new DataInputStream(this.in);
-    numRecordsRemaining = din.readInt();
+    try {
+      this.in = blockManager.wrapForCompression(blockId, bs);
+      this.din = new DataInputStream(this.in);
+      numRecordsRemaining = din.readInt();
+    } catch (IOException e) {
+      Closeables.close(bs, /* swallowIOException = */ true);
+      throw e;
+    }
   }
 
   @Override
@@ -75,12 +76,7 @@ public void loadNext() throws IOException {
     ByteStreams.readFully(in, arr, 0, recordLength);
     numRecordsRemaining--;
     if (numRecordsRemaining == 0) {
-      in.close();
-      if (!file.delete() && file.exists()) {
-        logger.warn("Unable to delete spill file {}", file.getPath());
-      }
-      in = null;
-      din = null;
+      close();
     }
   }
 
@@ -103,4 +99,16 @@ public int getRecordLength() {
   public long getKeyPrefix() {
     return keyPrefix;
   }
+
+  @Override
+  public void close() throws IOException {
+   if (in != null) {
+     try {
+       in.close();
+     } finally {
+       in = null;
+       din = null;
+     }
+   }
+  }
 }
diff --git a/examples/src/main/java/org/apache/spark/examples/streaming/JavaCustomReceiver.java b/examples/src/main/java/org/apache/spark/examples/streaming/JavaCustomReceiver.java
index 99df259b4e8e..4b50fbf59f80 100644
--- a/examples/src/main/java/org/apache/spark/examples/streaming/JavaCustomReceiver.java
+++ b/examples/src/main/java/org/apache/spark/examples/streaming/JavaCustomReceiver.java
@@ -18,6 +18,7 @@
 package org.apache.spark.examples.streaming;
 
 import com.google.common.collect.Lists;
+import com.google.common.io.Closeables;
 
 import org.apache.spark.SparkConf;
 import org.apache.spark.api.java.function.FlatMapFunction;
@@ -121,23 +122,23 @@ public void onStop() {
 
   /** Create a socket connection and receive data until receiver is stopped */
   private void receive() {
-    Socket socket = null;
-    String userInput = null;
-
     try {
-      // connect to the server
-      socket = new Socket(host, port);
-
-      BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
-
-      // Until stopped or connection broken continue reading
-      while (!isStopped() && (userInput = reader.readLine()) != null) {
-        System.out.println("Received data '" + userInput + "'");
-        store(userInput);
+      Socket socket = null;
+      BufferedReader reader = null;
+      String userInput = null;
+      try {
+        // connect to the server
+        socket = new Socket(host, port);
+        reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+        // Until stopped or connection broken continue reading
+        while (!isStopped() && (userInput = reader.readLine()) != null) {
+          System.out.println("Received data '" + userInput + "'");
+          store(userInput);
+        }
+      } finally {
+        Closeables.close(reader, /* swallowIOException = */ true);
+        Closeables.close(socket,  /* swallowIOException = */ true);
       }
-      reader.close();
-      socket.close();
-
       // Restart in an attempt to connect again when server is active again
       restart("Trying to connect again");
     } catch(ConnectException ce) {
diff --git a/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java b/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
index dc5fa1cee69b..50a324e29338 100644
--- a/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/ChunkFetchIntegrationSuite.java
@@ -31,6 +31,7 @@
 
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
+import com.google.common.io.Closeables;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -78,10 +79,15 @@ public static void setUp() throws Exception {
     testFile = File.createTempFile("shuffle-test-file", "txt");
     testFile.deleteOnExit();
     RandomAccessFile fp = new RandomAccessFile(testFile, "rw");
-    byte[] fileContent = new byte[1024];
-    new Random().nextBytes(fileContent);
-    fp.write(fileContent);
-    fp.close();
+    boolean shouldSuppressIOException = true;
+    try {
+      byte[] fileContent = new byte[1024];
+      new Random().nextBytes(fileContent);
+      fp.write(fileContent);
+      shouldSuppressIOException = false;
+    } finally {
+      Closeables.close(fp, shouldSuppressIOException);
+    }
 
     final TransportConf conf = new TransportConf("shuffle", new SystemPropertyConfigProvider());
     fileChunk = new FileSegmentManagedBuffer(conf, testFile, 10, testFile.length() - 25);
@@ -117,6 +123,7 @@ public StreamManager getStreamManager() {
 
   @AfterClass
   public static void tearDown() {
+    bufferChunk.release();
     server.close();
     clientFactory.close();
     testFile.delete();
diff --git a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/TestShuffleDataContext.java b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/TestShuffleDataContext.java
index 3fdde054ab6c..7ac1ca128aed 100644
--- a/network/shuffle/src/test/java/org/apache/spark/network/shuffle/TestShuffleDataContext.java
+++ b/network/shuffle/src/test/java/org/apache/spark/network/shuffle/TestShuffleDataContext.java
@@ -23,6 +23,7 @@
 import java.io.IOException;
 import java.io.OutputStream;
 
+import com.google.common.io.Closeables;
 import com.google.common.io.Files;
 
 import org.apache.spark.network.shuffle.protocol.ExecutorShuffleInfo;
@@ -60,21 +61,28 @@ public void cleanup() {
   public void insertSortShuffleData(int shuffleId, int mapId, byte[][] blocks) throws IOException {
     String blockId = "shuffle_" + shuffleId + "_" + mapId + "_0";
 
-    OutputStream dataStream = new FileOutputStream(
-      ExternalShuffleBlockResolver.getFile(localDirs, subDirsPerLocalDir, blockId + ".data"));
-    DataOutputStream indexStream = new DataOutputStream(new FileOutputStream(
-      ExternalShuffleBlockResolver.getFile(localDirs, subDirsPerLocalDir, blockId + ".index")));
+    OutputStream dataStream = null;
+    DataOutputStream indexStream = null;
+    boolean suppressExceptionsDuringClose = true;
 
-    long offset = 0;
-    indexStream.writeLong(offset);
-    for (byte[] block : blocks) {
-      offset += block.length;
-      dataStream.write(block);
+    try {
+      dataStream = new FileOutputStream(
+        ExternalShuffleBlockResolver.getFile(localDirs, subDirsPerLocalDir, blockId + ".data"));
+      indexStream = new DataOutputStream(new FileOutputStream(
+        ExternalShuffleBlockResolver.getFile(localDirs, subDirsPerLocalDir, blockId + ".index")));
+
+      long offset = 0;
       indexStream.writeLong(offset);
+      for (byte[] block : blocks) {
+        offset += block.length;
+        dataStream.write(block);
+        indexStream.writeLong(offset);
+      }
+      suppressExceptionsDuringClose = false;
+    } finally {
+      Closeables.close(dataStream, suppressExceptionsDuringClose);
+      Closeables.close(indexStream, suppressExceptionsDuringClose);
     }
-
-    dataStream.close();
-    indexStream.close();
   }
 
   /** Creates reducer blocks in a hash-based data format within our local dirs. */
diff --git a/streaming/src/test/java/org/apache/spark/streaming/JavaReceiverAPISuite.java b/streaming/src/test/java/org/apache/spark/streaming/JavaReceiverAPISuite.java
index ec2bffd6a5b9..7a8ef9d14784 100644
--- a/streaming/src/test/java/org/apache/spark/streaming/JavaReceiverAPISuite.java
+++ b/streaming/src/test/java/org/apache/spark/streaming/JavaReceiverAPISuite.java
@@ -23,6 +23,7 @@
 import org.apache.spark.streaming.api.java.JavaStreamingContext;
 import static org.junit.Assert.*;
 
+import com.google.common.io.Closeables;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -121,14 +122,19 @@ public void onStop() {
 
     private void receive() {
       try {
-        Socket socket = new Socket(host, port);
-        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
-        String userInput;
-        while ((userInput = in.readLine()) != null) {
-          store(userInput);
+        Socket socket = null;
+        BufferedReader in = null;
+        try {
+          socket = new Socket(host, port);
+          in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+          String userInput;
+          while ((userInput = in.readLine()) != null) {
+            store(userInput);
+          }
+        } finally {
+          Closeables.close(in, /* swallowIOException = */ true);
+          Closeables.close(socket,  /* swallowIOException = */ true);
         }
-        in.close();
-        socket.close();
       } catch(ConnectException ce) {
         ce.printStackTrace();
         restart("Could not connect", ce);

From a402c92c92b2e1c85d264f6077aec8f6d6a08270 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Wed, 18 Nov 2015 16:08:06 -0800
Subject: [PATCH 785/896] [SPARK-11814][STREAMING] Add better default
 checkpoint duration

DStream checkpoint interval is by default set at max(10 second, batch interval). That's bad for large batch intervals where the checkpoint interval = batch interval, and RDDs get checkpointed every batch.
This PR is to set the checkpoint interval of trackStateByKey to 10 * batch duration.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9805 from tdas/SPARK-11814.
---
 .../streaming/dstream/TrackStateDStream.scala | 13 ++++++
 .../streaming/TrackStateByKeySuite.scala      | 44 ++++++++++++++++++-
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
index 98e881e6ae11..0ada1111ce30 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/dstream/TrackStateDStream.scala
@@ -25,6 +25,7 @@ import org.apache.spark.rdd.{EmptyRDD, RDD}
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.streaming._
 import org.apache.spark.streaming.rdd.{TrackStateRDD, TrackStateRDDRecord}
+import org.apache.spark.streaming.dstream.InternalTrackStateDStream._
 
 /**
  * :: Experimental ::
@@ -120,6 +121,14 @@ class InternalTrackStateDStream[K: ClassTag, V: ClassTag, S: ClassTag, E: ClassT
   /** Enable automatic checkpointing */
   override val mustCheckpoint = true
 
+  /** Override the default checkpoint duration */
+  override def initialize(time: Time): Unit = {
+    if (checkpointDuration == null) {
+      checkpointDuration = slideDuration * DEFAULT_CHECKPOINT_DURATION_MULTIPLIER
+    }
+    super.initialize(time)
+  }
+
   /** Method that generates a RDD for the given time */
   override def compute(validTime: Time): Option[RDD[TrackStateRDDRecord[K, S, E]]] = {
     // Get the previous state or create a new empty state RDD
@@ -141,3 +150,7 @@ class InternalTrackStateDStream[K: ClassTag, V: ClassTag, S: ClassTag, E: ClassT
     }
   }
 }
+
+private[streaming] object InternalTrackStateDStream {
+  private val DEFAULT_CHECKPOINT_DURATION_MULTIPLIER = 10
+}
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
index e3072b444284..58aef74c0040 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/TrackStateByKeySuite.scala
@@ -22,9 +22,10 @@ import java.io.File
 import scala.collection.mutable.{ArrayBuffer, SynchronizedBuffer}
 import scala.reflect.ClassTag
 
+import org.scalatest.PrivateMethodTester._
 import org.scalatest.{BeforeAndAfter, BeforeAndAfterAll}
 
-import org.apache.spark.streaming.dstream.{TrackStateDStream, TrackStateDStreamImpl}
+import org.apache.spark.streaming.dstream.{InternalTrackStateDStream, TrackStateDStream, TrackStateDStreamImpl}
 import org.apache.spark.util.{ManualClock, Utils}
 import org.apache.spark.{SparkConf, SparkContext, SparkFunSuite}
 
@@ -57,6 +58,12 @@ class TrackStateByKeySuite extends SparkFunSuite with BeforeAndAfterAll with Bef
     sc = new SparkContext(conf)
   }
 
+  override def afterAll(): Unit = {
+    if (sc != null) {
+      sc.stop()
+    }
+  }
+
   test("state - get, exists, update, remove, ") {
     var state: StateImpl[Int] = null
 
@@ -436,6 +443,41 @@ class TrackStateByKeySuite extends SparkFunSuite with BeforeAndAfterAll with Bef
     assert(collectedStateSnapshots.last.toSet === Set(("a", 1)))
   }
 
+  test("trackStateByKey - checkpoint durations") {
+    val privateMethod = PrivateMethod[InternalTrackStateDStream[_, _, _, _]]('internalStream)
+
+    def testCheckpointDuration(
+        batchDuration: Duration,
+        expectedCheckpointDuration: Duration,
+        explicitCheckpointDuration: Option[Duration] = None
+      ): Unit = {
+      try {
+        ssc = new StreamingContext(sc, batchDuration)
+        val inputStream = new TestInputStream(ssc, Seq.empty[Seq[Int]], 2).map(_ -> 1)
+        val dummyFunc = (value: Option[Int], state: State[Int]) => 0
+        val trackStateStream = inputStream.trackStateByKey(StateSpec.function(dummyFunc))
+        val internalTrackStateStream = trackStateStream invokePrivate privateMethod()
+
+        explicitCheckpointDuration.foreach { d =>
+          trackStateStream.checkpoint(d)
+        }
+        trackStateStream.register()
+        ssc.start()  // should initialize all the checkpoint durations
+        assert(trackStateStream.checkpointDuration === null)
+        assert(internalTrackStateStream.checkpointDuration === expectedCheckpointDuration)
+      } finally {
+        StreamingContext.getActive().foreach { _.stop(stopSparkContext = false) }
+      }
+    }
+
+    testCheckpointDuration(Milliseconds(100), Seconds(1))
+    testCheckpointDuration(Seconds(1), Seconds(10))
+    testCheckpointDuration(Seconds(10), Seconds(100))
+
+    testCheckpointDuration(Milliseconds(100), Seconds(2), Some(Seconds(2)))
+    testCheckpointDuration(Seconds(1), Seconds(2), Some(Seconds(2)))
+    testCheckpointDuration(Seconds(10), Seconds(20), Some(Seconds(20)))
+  }
 
   private def testOperation[K: ClassTag, S: ClassTag, T: ClassTag](
       input: Seq[Seq[K]],

From 921900fd06362474f8caac675803d526a0986d70 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Wed, 18 Nov 2015 16:19:00 -0800
Subject: [PATCH 786/896] [SPARK-11791] Fix flaky test in
 BatchedWriteAheadLogSuite

stack trace of failure:
```
org.scalatest.exceptions.TestFailedDueToTimeoutException: The code passed to eventually never returned normally. Attempted 62 times over 1.006322071 seconds. Last failure message:
Argument(s) are different! Wanted:
writeAheadLog.write(
    java.nio.HeapByteBuffer[pos=0 lim=124 cap=124],
    10
);
-> at org.apache.spark.streaming.util.BatchedWriteAheadLogSuite$$anonfun$23$$anonfun$apply$mcV$sp$15.apply(WriteAheadLogSuite.scala:518)
Actual invocation has different arguments:
writeAheadLog.write(
    java.nio.HeapByteBuffer[pos=0 lim=124 cap=124],
    10
);
-> at org.apache.spark.streaming.util.WriteAheadLogSuite$BlockingWriteAheadLog.write(WriteAheadLogSuite.scala:756)
```

I believe the issue was that due to a race condition, the ordering of the events could be messed up in the final ByteBuffer, therefore the comparison fails.

By adding eventually between the requests, we make sure the ordering is preserved. Note that in real life situations, the ordering across threads will not matter.

Another solution would be to implement a custom mockito matcher that sorts and then compares the results, but that kind of sounds like overkill to me. Let me know what you think tdas zsxwing

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9790 from brkyvz/fix-flaky-2.
---
 .../spark/streaming/util/WriteAheadLogSuite.scala    | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
index 7f80d6ecdbbb..eaa88ea3cd38 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/util/WriteAheadLogSuite.scala
@@ -30,6 +30,7 @@ import scala.language.{implicitConversions, postfixOps}
 
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
+import org.mockito.ArgumentCaptor
 import org.mockito.Matchers.{eq => meq}
 import org.mockito.Matchers._
 import org.mockito.Mockito._
@@ -507,15 +508,18 @@ class BatchedWriteAheadLogSuite extends CommonWriteAheadLogTests(
     }
     blockingWal.allowWrite()
 
-    val buffer1 = wrapArrayArrayByte(Array(event1))
-    val buffer2 = wrapArrayArrayByte(Array(event2, event3, event4, event5))
+    val buffer = wrapArrayArrayByte(Array(event1))
+    val queuedEvents = Set(event2, event3, event4, event5)
 
     eventually(timeout(1 second)) {
       assert(batchedWal.invokePrivate(queueLength()) === 0)
-      verify(wal, times(1)).write(meq(buffer1), meq(3L))
+      verify(wal, times(1)).write(meq(buffer), meq(3L))
       // the file name should be the timestamp of the last record, as events should be naturally
       // in order of timestamp, and we need the last element.
-      verify(wal, times(1)).write(meq(buffer2), meq(10L))
+      val bufferCaptor = ArgumentCaptor.forClass(classOf[ByteBuffer])
+      verify(wal, times(1)).write(bufferCaptor.capture(), meq(10L))
+      val records = BatchedWriteAheadLog.deaggregate(bufferCaptor.getValue).map(byteBufferToString)
+      assert(records.toSet === queuedEvents)
     }
   }
 

From 59a501359a267fbdb7689058693aa788703e54b1 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Wed, 18 Nov 2015 16:48:09 -0800
Subject: [PATCH 787/896] [SPARK-11636][SQL] Support classes defined in the
 REPL with Encoders

Before this PR there were two things that would blow up if you called `df.as[MyClass]` if `MyClass` was defined in the REPL:
 - [x] Because `classForName` doesn't work on the munged names returned by `tpe.erasure.typeSymbol.asClass.fullName`
 - [x] Because we don't have anything to pass into the constructor for the `$outer` pointer.

Note that this PR is just adding the infrastructure for working with inner classes in encoder and is not yet sufficient to make them work in the REPL.  Currently, the implementation show in https://github.com/marmbrus/spark/commit/95cec7d413b930b36420724fafd829bef8c732ab is causing a bug that breaks code gen due to some interaction between janino and the `ExecutorClassLoader`.  This will be addressed in a follow-up PR.

Author: Michael Armbrust <michael@databricks.com>

Closes #9602 from marmbrus/dataset-replClasses.
---
 .../spark/sql/catalyst/ScalaReflection.scala  | 81 ++++++++++---------
 .../catalyst/encoders/ExpressionEncoder.scala | 26 +++++-
 .../sql/catalyst/encoders/OuterScopes.scala   | 42 ++++++++++
 .../catalyst/encoders/ProductEncoder.scala    |  6 +-
 .../expressions/codegen/CodegenFallback.scala |  2 +-
 .../codegen/GenerateMutableProjection.scala   |  4 +-
 .../codegen/GenerateProjection.scala          | 10 +--
 .../codegen/GenerateSafeProjection.scala      |  4 +-
 .../codegen/GenerateUnsafeProjection.scala    |  4 +-
 .../codegen/GenerateUnsafeRowJoiner.scala     |  6 +-
 .../sql/catalyst/expressions/literals.scala   |  6 ++
 .../sql/catalyst/expressions/objects.scala    | 42 ++++++++--
 .../encoders/ExpressionEncoderSuite.scala     |  7 +-
 .../encoders/ProductEncoderSuite.scala        |  4 +
 .../scala/org/apache/spark/sql/Dataset.scala  |  4 +-
 .../org/apache/spark/sql/GroupedDataset.scala |  8 +-
 .../aggregate/TypedAggregateExpression.scala  | 19 ++---
 17 files changed, 193 insertions(+), 82 deletions(-)
 create mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 38828e59a215..59ccf356f2c4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -35,17 +35,6 @@ object ScalaReflection extends ScalaReflection {
   // class loader of the current thread.
   override def mirror: universe.Mirror =
     universe.runtimeMirror(Thread.currentThread().getContextClassLoader)
-}
-
-/**
- * Support for generating catalyst schemas for scala objects.
- */
-trait ScalaReflection {
-  /** The universe we work in (runtime or macro) */
-  val universe: scala.reflect.api.Universe
-
-  /** The mirror used to access types in the universe */
-  def mirror: universe.Mirror
 
   import universe._
 
@@ -53,30 +42,6 @@ trait ScalaReflection {
   // Since the map values can be mutable, we explicitly import scala.collection.Map at here.
   import scala.collection.Map
 
-  case class Schema(dataType: DataType, nullable: Boolean)
-
-  /** Returns a Sequence of attributes for the given case class type. */
-  def attributesFor[T: TypeTag]: Seq[Attribute] = schemaFor[T] match {
-    case Schema(s: StructType, _) =>
-      s.toAttributes
-  }
-
-  /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
-  def schemaFor[T: TypeTag]: Schema =
-    ScalaReflectionLock.synchronized { schemaFor(localTypeOf[T]) }
-
-  /**
-   * Return the Scala Type for `T` in the current classloader mirror.
-   *
-   * Use this method instead of the convenience method `universe.typeOf`, which
-   * assumes that all types can be found in the classloader that loaded scala-reflect classes.
-   * That's not necessarily the case when running using Eclipse launchers or even
-   * Sbt console or test (without `fork := true`).
-   *
-   * @see SPARK-5281
-   */
-  def localTypeOf[T: TypeTag]: `Type` = typeTag[T].in(mirror).tpe
-
   /**
    * Returns the Spark SQL DataType for a given scala type.  Where this is not an exact mapping
    * to a native type, an ObjectType is returned. Special handling is also used for Arrays including
@@ -114,7 +79,9 @@ trait ScalaReflection {
 
           }
           ObjectType(cls)
-        case other => ObjectType(Utils.classForName(className))
+        case other =>
+          val clazz = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
+          ObjectType(clazz)
       }
   }
 
@@ -640,6 +607,48 @@ trait ScalaReflection {
       }
     }
   }
+}
+
+/**
+ * Support for generating catalyst schemas for scala objects.  Note that unlike its companion
+ * object, this trait able to work in both the runtime and the compile time (macro) universe.
+ */
+trait ScalaReflection {
+  /** The universe we work in (runtime or macro) */
+  val universe: scala.reflect.api.Universe
+
+  /** The mirror used to access types in the universe */
+  def mirror: universe.Mirror
+
+  import universe._
+
+  // The Predef.Map is scala.collection.immutable.Map.
+  // Since the map values can be mutable, we explicitly import scala.collection.Map at here.
+  import scala.collection.Map
+
+  case class Schema(dataType: DataType, nullable: Boolean)
+
+  /** Returns a Sequence of attributes for the given case class type. */
+  def attributesFor[T: TypeTag]: Seq[Attribute] = schemaFor[T] match {
+    case Schema(s: StructType, _) =>
+      s.toAttributes
+  }
+
+  /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
+  def schemaFor[T: TypeTag]: Schema =
+    ScalaReflectionLock.synchronized { schemaFor(localTypeOf[T]) }
+
+  /**
+   * Return the Scala Type for `T` in the current classloader mirror.
+   *
+   * Use this method instead of the convenience method `universe.typeOf`, which
+   * assumes that all types can be found in the classloader that loaded scala-reflect classes.
+   * That's not necessarily the case when running using Eclipse launchers or even
+   * Sbt console or test (without `fork := true`).
+   *
+   * @see SPARK-5281
+   */
+  def localTypeOf[T: TypeTag]: `Type` = typeTag[T].in(mirror).tpe
 
   /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
   def schemaFor(tpe: `Type`): Schema = ScalaReflectionLock.synchronized {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index b977f278c5b5..456b59500847 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -17,11 +17,13 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+import java.util.concurrent.ConcurrentMap
+
 import scala.reflect.ClassTag
 import scala.reflect.runtime.universe.{typeTag, TypeTag}
 
 import org.apache.spark.util.Utils
-import org.apache.spark.sql.Encoder
+import org.apache.spark.sql.{AnalysisException, Encoder}
 import org.apache.spark.sql.catalyst.analysis.{SimpleAnalyzer, UnresolvedExtractValue, UnresolvedAttribute}
 import org.apache.spark.sql.catalyst.plans.logical.{LocalRelation, Project}
 import org.apache.spark.sql.catalyst.expressions._
@@ -211,7 +213,9 @@ case class ExpressionEncoder[T](
    * Returns a new copy of this encoder, where the expressions used by `fromRow` are resolved to the
    * given schema.
    */
-  def resolve(schema: Seq[Attribute]): ExpressionEncoder[T] = {
+  def resolve(
+      schema: Seq[Attribute],
+      outerScopes: ConcurrentMap[String, AnyRef]): ExpressionEncoder[T] = {
     val positionToAttribute = AttributeMap.toIndex(schema)
     val unbound = fromRowExpression transform {
       case b: BoundReference => positionToAttribute(b.ordinal)
@@ -219,7 +223,23 @@ case class ExpressionEncoder[T](
 
     val plan = Project(Alias(unbound, "")() :: Nil, LocalRelation(schema))
     val analyzedPlan = SimpleAnalyzer.execute(plan)
-    copy(fromRowExpression = analyzedPlan.expressions.head.children.head)
+
+    // In order to construct instances of inner classes (for example those declared in a REPL cell),
+    // we need an instance of the outer scope.  This rule substitues those outer objects into
+    // expressions that are missing them by looking up the name in the SQLContexts `outerScopes`
+    // registry.
+    copy(fromRowExpression = analyzedPlan.expressions.head.children.head transform {
+      case n: NewInstance if n.outerPointer.isEmpty && n.cls.isMemberClass =>
+        val outer = outerScopes.get(n.cls.getDeclaringClass.getName)
+        if (outer == null) {
+          throw new AnalysisException(
+            s"Unable to generate an encoder for inner class `${n.cls.getName}` without access " +
+            s"to the scope that this class was defined in. " + "" +
+             "Try moving this class out of its parent class.")
+        }
+
+        n.copy(outerPointer = Some(Literal.fromObject(outer)))
+    })
   }
 
   /**
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
new file mode 100644
index 000000000000..a753b187bcd3
--- /dev/null
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/OuterScopes.scala
@@ -0,0 +1,42 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import java.util.concurrent.ConcurrentMap
+
+import com.google.common.collect.MapMaker
+
+object OuterScopes {
+  @transient
+  lazy val outerScopes: ConcurrentMap[String, AnyRef] =
+    new MapMaker().weakValues().makeMap()
+
+  /**
+   * Adds a new outer scope to this context that can be used when instantiating an `inner class`
+   * during deserialialization. Inner classes are created when a case class is defined in the
+   * Spark REPL and registering the outer scope that this class was defined in allows us to create
+   * new instances on the spark executors.  In normal use, users should not need to call this
+   * function.
+   *
+   * Warning: this function operates on the assumption that there is only ever one instance of any
+   * given wrapper class.
+   */
+  def addOuterScope(outer: AnyRef): Unit = {
+    outerScopes.putIfAbsent(outer.getClass.getName, outer)
+  }
+}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
index 55c4ee11b20f..2914c6ee790c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
@@ -31,6 +31,7 @@ import scala.reflect.ClassTag
 
 object ProductEncoder {
   import ScalaReflection.universe._
+  import ScalaReflection.mirror
   import ScalaReflection.localTypeOf
   import ScalaReflection.dataTypeFor
   import ScalaReflection.Schema
@@ -420,8 +421,7 @@ object ProductEncoder {
           }
         }
 
-        val className: String = t.erasure.typeSymbol.asClass.fullName
-        val cls = Utils.classForName(className)
+        val cls = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
 
         val arguments = params.head.zipWithIndex.map { case (p, i) =>
           val fieldName = p.name.toString
@@ -429,7 +429,7 @@ object ProductEncoder {
           val dataType = schemaFor(fieldType).dataType
 
           // For tuples, we based grab the inner fields by ordinal instead of name.
-          if (className startsWith "scala.Tuple") {
+          if (cls.getName startsWith "scala.Tuple") {
             constructorFor(fieldType, Some(addToPathOrdinal(i, dataType)))
           } else {
             constructorFor(fieldType, Some(addToPath(fieldName)))
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
index d51a8dede7f3..a31574c251af 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodegenFallback.scala
@@ -34,7 +34,7 @@ trait CodegenFallback extends Expression {
     val objectTerm = ctx.freshName("obj")
     s"""
       /* expression: ${this} */
-      Object $objectTerm = expressions[${ctx.references.size - 1}].eval(${ctx.INPUT_ROW});
+      java.lang.Object $objectTerm = expressions[${ctx.references.size - 1}].eval(${ctx.INPUT_ROW});
       boolean ${ev.isNull} = $objectTerm == null;
       ${ctx.javaType(this.dataType)} ${ev.value} = ${ctx.defaultValue(this.dataType)};
       if (!${ev.isNull}) {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
index 4b66069b5f55..40189f087776 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateMutableProjection.scala
@@ -82,7 +82,7 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
     val allUpdates = ctx.splitExpressions(ctx.INPUT_ROW, updates)
 
     val code = s"""
-      public Object generate($exprType[] expr) {
+      public java.lang.Object generate($exprType[] expr) {
         return new SpecificMutableProjection(expr);
       }
 
@@ -109,7 +109,7 @@ object GenerateMutableProjection extends CodeGenerator[Seq[Expression], () => Mu
           return (InternalRow) mutableRow;
         }
 
-        public Object apply(Object _i) {
+        public java.lang.Object apply(java.lang.Object _i) {
           InternalRow ${ctx.INPUT_ROW} = (InternalRow) _i;
           $allProjections
           // copy all the results into MutableRow
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
index c0d313b2e130..f229f2000d8e 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateProjection.scala
@@ -167,7 +167,7 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         ${initMutableStates(ctx)}
       }
 
-      public Object apply(Object r) {
+      public java.lang.Object apply(java.lang.Object r) {
         // GenerateProjection does not work with UnsafeRows.
         assert(!(r instanceof ${classOf[UnsafeRow].getName}));
         return new SpecificRow((InternalRow) r);
@@ -186,14 +186,14 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         public void setNullAt(int i) { nullBits[i] = true; }
         public boolean isNullAt(int i) { return nullBits[i]; }
 
-        public Object genericGet(int i) {
+        public java.lang.Object genericGet(int i) {
           if (isNullAt(i)) return null;
           switch (i) {
           $getCases
           }
           return null;
         }
-        public void update(int i, Object value) {
+        public void update(int i, java.lang.Object value) {
           if (value == null) {
             setNullAt(i);
             return;
@@ -212,7 +212,7 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
           return result;
         }
 
-        public boolean equals(Object other) {
+        public boolean equals(java.lang.Object other) {
           if (other instanceof SpecificRow) {
             SpecificRow row = (SpecificRow) other;
             $columnChecks
@@ -222,7 +222,7 @@ object GenerateProjection extends CodeGenerator[Seq[Expression], Projection] {
         }
 
         public InternalRow copy() {
-          Object[] arr = new Object[${expressions.length}];
+          java.lang.Object[] arr = new java.lang.Object[${expressions.length}];
           ${copyColumns}
           return new ${classOf[GenericInternalRow].getName}(arr);
         }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
index f0ed8645d923..b7926bda3de1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateSafeProjection.scala
@@ -148,7 +148,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
     }
     val allExpressions = ctx.splitExpressions(ctx.INPUT_ROW, expressionCodes)
     val code = s"""
-      public Object generate($exprType[] expr) {
+      public java.lang.Object generate($exprType[] expr) {
         return new SpecificSafeProjection(expr);
       }
 
@@ -165,7 +165,7 @@ object GenerateSafeProjection extends CodeGenerator[Seq[Expression], Projection]
           ${initMutableStates(ctx)}
         }
 
-        public Object apply(Object _i) {
+        public java.lang.Object apply(java.lang.Object _i) {
           InternalRow ${ctx.INPUT_ROW} = (InternalRow) _i;
           $allExpressions
           return mutableRow;
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
index 4c17d02a2372..7b6c9373ebe3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeProjection.scala
@@ -324,7 +324,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
     val eval = createCode(ctx, expressions, subexpressionEliminationEnabled)
 
     val code = s"""
-      public Object generate($exprType[] exprs) {
+      public java.lang.Object generate($exprType[] exprs) {
         return new SpecificUnsafeProjection(exprs);
       }
 
@@ -342,7 +342,7 @@ object GenerateUnsafeProjection extends CodeGenerator[Seq[Expression], UnsafePro
         }
 
         // Scala.Function1 need this
-        public Object apply(Object row) {
+        public java.lang.Object apply(java.lang.Object row) {
           return apply((InternalRow) row);
         }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeRowJoiner.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeRowJoiner.scala
index da91ff29537b..da602d9b4bce 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeRowJoiner.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/GenerateUnsafeRowJoiner.scala
@@ -159,7 +159,7 @@ object GenerateUnsafeRowJoiner extends CodeGenerator[(StructType, StructType), U
 
     // ------------------------ Finally, put everything together  --------------------------- //
     val code = s"""
-       |public Object generate($exprType[] exprs) {
+       |public java.lang.Object generate($exprType[] exprs) {
        |  return new SpecificUnsafeRowJoiner();
        |}
        |
@@ -176,9 +176,9 @@ object GenerateUnsafeRowJoiner extends CodeGenerator[(StructType, StructType), U
        |      buf = new byte[sizeInBytes];
        |    }
        |
-       |    final Object obj1 = row1.getBaseObject();
+       |    final java.lang.Object obj1 = row1.getBaseObject();
        |    final long offset1 = row1.getBaseOffset();
-       |    final Object obj2 = row2.getBaseObject();
+       |    final java.lang.Object obj2 = row2.getBaseObject();
        |    final long offset2 = row2.getBaseOffset();
        |
        |    $copyBitset
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
index 455fa2427c26..e34fd49be838 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
@@ -48,6 +48,12 @@ object Literal {
       throw new RuntimeException("Unsupported literal type " + v.getClass + " " + v)
   }
 
+  /**
+   * Constructs a [[Literal]] of [[ObjectType]], for example when you need to pass an object
+   * into code generation.
+   */
+  def fromObject(obj: AnyRef): Literal = new Literal(obj, ObjectType(obj.getClass))
+
   def create(v: Any, dataType: DataType): Literal = {
     Literal(CatalystTypeConverters.convertToCatalyst(v), dataType)
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index acf0da240051..f865a9408ef4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -24,6 +24,7 @@ import org.apache.spark.SparkConf
 import org.apache.spark.serializer._
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
+import org.apache.spark.sql.catalyst.encoders.ProductEncoder
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
 import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.catalyst.InternalRow
@@ -178,6 +179,15 @@ case class Invoke(
   }
 }
 
+object NewInstance {
+  def apply(
+      cls: Class[_],
+      arguments: Seq[Expression],
+      propagateNull: Boolean = false,
+      dataType: DataType): NewInstance =
+    new NewInstance(cls, arguments, propagateNull, dataType, None)
+}
+
 /**
  * Constructs a new instance of the given class, using the result of evaluating the specified
  * expressions as arguments.
@@ -189,12 +199,15 @@ case class Invoke(
  * @param dataType The type of object being constructed, as a Spark SQL datatype.  This allows you
  *                 to manually specify the type when the object in question is a valid internal
  *                 representation (i.e. ArrayData) instead of an object.
+ * @param outerPointer If the object being constructed is an inner class the outerPointer must
+ *                     for the containing class must be specified.
  */
 case class NewInstance(
     cls: Class[_],
     arguments: Seq[Expression],
-    propagateNull: Boolean = true,
-    dataType: DataType) extends Expression {
+    propagateNull: Boolean,
+    dataType: DataType,
+    outerPointer: Option[Literal]) extends Expression {
   private val className = cls.getName
 
   override def nullable: Boolean = propagateNull
@@ -209,30 +222,43 @@ case class NewInstance(
     val argGen = arguments.map(_.gen(ctx))
     val argString = argGen.map(_.value).mkString(", ")
 
+    val outer = outerPointer.map(_.gen(ctx))
+
+    val setup =
+      s"""
+         ${argGen.map(_.code).mkString("\n")}
+         ${outer.map(_.code.mkString("")).getOrElse("")}
+       """.stripMargin
+
+    val constructorCall = outer.map { gen =>
+      s"""${gen.value}.new ${cls.getSimpleName}($argString)"""
+    }.getOrElse {
+      s"new $className($argString)"
+    }
+
     if (propagateNull) {
       val objNullCheck = if (ctx.defaultValue(dataType) == "null") {
         s"${ev.isNull} = ${ev.value} == null;"
       } else {
         ""
       }
-
       val argsNonNull = s"!(${argGen.map(_.isNull).mkString(" || ")})"
+
       s"""
-        ${argGen.map(_.code).mkString("\n")}
+        $setup
 
         boolean ${ev.isNull} = true;
         $javaType ${ev.value} = ${ctx.defaultValue(dataType)};
-
         if ($argsNonNull) {
-          ${ev.value} = new $className($argString);
+          ${ev.value} = $constructorCall;
           ${ev.isNull} = false;
         }
        """
     } else {
       s"""
-        ${argGen.map(_.code).mkString("\n")}
+        $setup
 
-        $javaType ${ev.value} = new $className($argString);
+        $javaType ${ev.value} = $constructorCall;
         final boolean ${ev.isNull} = ${ev.value} == null;
       """
     }
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index 9fe64b4cf10e..cde0364f3dd9 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -18,6 +18,9 @@
 package org.apache.spark.sql.catalyst.encoders
 
 import java.util.Arrays
+import java.util.concurrent.ConcurrentMap
+
+import com.google.common.collect.MapMaker
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.AttributeReference
@@ -25,6 +28,8 @@ import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.types.ArrayType
 
 abstract class ExpressionEncoderSuite extends SparkFunSuite {
+  val outers: ConcurrentMap[String, AnyRef] = new MapMaker().weakValues().makeMap()
+
   protected def encodeDecodeTest[T](
       input: T,
       encoder: ExpressionEncoder[T],
@@ -32,7 +37,7 @@ abstract class ExpressionEncoderSuite extends SparkFunSuite {
     test(s"encode/decode for $testName: $input") {
       val row = encoder.toRow(input)
       val schema = encoder.schema.toAttributes
-      val boundEncoder = encoder.resolve(schema).bind(schema)
+      val boundEncoder = encoder.resolve(schema, outers).bind(schema)
       val convertedBack = try boundEncoder.fromRow(row) catch {
         case e: Exception =>
           fail(
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
index bc539d62c537..1798514c5c38 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
@@ -53,6 +53,10 @@ case class RepeatedData(
 case class SpecificCollection(l: List[Int])
 
 class ProductEncoderSuite extends ExpressionEncoderSuite {
+  outers.put(getClass.getName, this)
+
+  case class InnerClass(i: Int)
+  productTest(InnerClass(1))
 
   productTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index b644f6ad3096..bdcdc5d47cba 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -74,7 +74,7 @@ class Dataset[T] private[sql](
 
   /** The encoder for this [[Dataset]] that has been resolved to its output schema. */
   private[sql] val resolvedTEncoder: ExpressionEncoder[T] =
-    unresolvedTEncoder.resolve(queryExecution.analyzed.output)
+    unresolvedTEncoder.resolve(queryExecution.analyzed.output, OuterScopes.outerScopes)
 
   private implicit def classTag = resolvedTEncoder.clsTag
 
@@ -375,7 +375,7 @@ class Dataset[T] private[sql](
       sqlContext,
       Project(
         c1.withInputType(
-          resolvedTEncoder,
+          resolvedTEncoder.bind(queryExecution.analyzed.output),
           queryExecution.analyzed.output).named :: Nil,
         logicalPlan))
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 3f84e22a1025..7e5acbe8517d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -21,7 +21,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function._
-import org.apache.spark.sql.catalyst.encoders.{FlatEncoder, ExpressionEncoder, encoderFor}
+import org.apache.spark.sql.catalyst.encoders.{FlatEncoder, ExpressionEncoder, encoderFor, OuterScopes}
 import org.apache.spark.sql.catalyst.expressions.{Alias, CreateStruct, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
@@ -52,8 +52,10 @@ class GroupedDataset[K, T] private[sql](
   private implicit val unresolvedKEncoder = encoderFor(kEncoder)
   private implicit val unresolvedTEncoder = encoderFor(tEncoder)
 
-  private val resolvedKEncoder = unresolvedKEncoder.resolve(groupingAttributes)
-  private val resolvedTEncoder = unresolvedTEncoder.resolve(dataAttributes)
+  private val resolvedKEncoder =
+    unresolvedKEncoder.resolve(groupingAttributes, OuterScopes.outerScopes)
+  private val resolvedTEncoder =
+    unresolvedTEncoder.resolve(dataAttributes, OuterScopes.outerScopes)
 
   private def logicalPlan = queryExecution.analyzed
   private def sqlContext = queryExecution.sqlContext
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index 3f2775896bb8..6ce41aaf01e2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -52,8 +52,8 @@ object TypedAggregateExpression {
  */
 case class TypedAggregateExpression(
     aggregator: Aggregator[Any, Any, Any],
-    aEncoder: Option[ExpressionEncoder[Any]],
-    bEncoder: ExpressionEncoder[Any],
+    aEncoder: Option[ExpressionEncoder[Any]], // Should be bound.
+    bEncoder: ExpressionEncoder[Any], // Should be bound.
     cEncoder: ExpressionEncoder[Any],
     children: Seq[Attribute],
     mutableAggBufferOffset: Int,
@@ -92,9 +92,6 @@ case class TypedAggregateExpression(
   // We let the dataset do the binding for us.
   lazy val boundA = aEncoder.get
 
-  val bAttributes = bEncoder.schema.toAttributes
-  lazy val boundB = bEncoder.resolve(bAttributes).bind(bAttributes)
-
   private def updateBuffer(buffer: MutableRow, value: InternalRow): Unit = {
     // todo: need a more neat way to assign the value.
     var i = 0
@@ -114,24 +111,24 @@ case class TypedAggregateExpression(
 
   override def update(buffer: MutableRow, input: InternalRow): Unit = {
     val inputA = boundA.fromRow(input)
-    val currentB = boundB.shift(mutableAggBufferOffset).fromRow(buffer)
+    val currentB = bEncoder.shift(mutableAggBufferOffset).fromRow(buffer)
     val merged = aggregator.reduce(currentB, inputA)
-    val returned = boundB.toRow(merged)
+    val returned = bEncoder.toRow(merged)
 
     updateBuffer(buffer, returned)
   }
 
   override def merge(buffer1: MutableRow, buffer2: InternalRow): Unit = {
-    val b1 = boundB.shift(mutableAggBufferOffset).fromRow(buffer1)
-    val b2 = boundB.shift(inputAggBufferOffset).fromRow(buffer2)
+    val b1 = bEncoder.shift(mutableAggBufferOffset).fromRow(buffer1)
+    val b2 = bEncoder.shift(inputAggBufferOffset).fromRow(buffer2)
     val merged = aggregator.merge(b1, b2)
-    val returned = boundB.toRow(merged)
+    val returned = bEncoder.toRow(merged)
 
     updateBuffer(buffer1, returned)
   }
 
   override def eval(buffer: InternalRow): Any = {
-    val b = boundB.shift(mutableAggBufferOffset).fromRow(buffer)
+    val b = bEncoder.shift(mutableAggBufferOffset).fromRow(buffer)
     val result = cEncoder.toRow(aggregator.finish(b))
     dataType match {
       case _: StructType => result

From e99d3392068bc929c900a4cc7b50e9e2b437a23a Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Wed, 18 Nov 2015 18:34:01 -0800
Subject: [PATCH 788/896] [SPARK-11839][ML] refactor save/write traits

* add "ML" prefix to reader/writer/readable/writable to avoid name collision with java.util.*
* define `DefaultParamsReadable/Writable` and use them to save some code
* use `super.load` instead so people can jump directly to the doc of `Readable.load`, which documents the Java compatibility issues

jkbradley

Author: Xiangrui Meng <meng@databricks.com>

Closes #9827 from mengxr/SPARK-11839.
---
 .../scala/org/apache/spark/ml/Pipeline.scala  | 40 +++++++++----------
 .../classification/LogisticRegression.scala   | 29 +++++++-------
 .../apache/spark/ml/feature/Binarizer.scala   | 12 ++----
 .../apache/spark/ml/feature/Bucketizer.scala  | 12 ++----
 .../spark/ml/feature/CountVectorizer.scala    | 22 ++++------
 .../org/apache/spark/ml/feature/DCT.scala     | 12 ++----
 .../apache/spark/ml/feature/HashingTF.scala   | 12 ++----
 .../org/apache/spark/ml/feature/IDF.scala     | 23 +++++------
 .../apache/spark/ml/feature/Interaction.scala | 12 ++----
 .../spark/ml/feature/MinMaxScaler.scala       | 22 ++++------
 .../org/apache/spark/ml/feature/NGram.scala   | 12 ++----
 .../apache/spark/ml/feature/Normalizer.scala  | 12 ++----
 .../spark/ml/feature/OneHotEncoder.scala      | 12 ++----
 .../ml/feature/PolynomialExpansion.scala      | 12 ++----
 .../ml/feature/QuantileDiscretizer.scala      | 12 ++----
 .../spark/ml/feature/SQLTransformer.scala     | 13 ++----
 .../spark/ml/feature/StandardScaler.scala     | 22 ++++------
 .../spark/ml/feature/StopWordsRemover.scala   | 12 ++----
 .../spark/ml/feature/StringIndexer.scala      | 32 +++++----------
 .../apache/spark/ml/feature/Tokenizer.scala   | 24 +++--------
 .../spark/ml/feature/VectorAssembler.scala    | 12 ++----
 .../spark/ml/feature/VectorSlicer.scala       | 12 ++----
 .../apache/spark/ml/recommendation/ALS.scala  | 27 +++++--------
 .../ml/regression/LinearRegression.scala      | 30 ++++++--------
 .../org/apache/spark/ml/util/ReadWrite.scala  | 40 ++++++++++++-------
 .../org/apache/spark/ml/PipelineSuite.scala   | 14 +++----
 .../spark/ml/util/DefaultReadWriteTest.scala  | 17 ++++----
 27 files changed, 190 insertions(+), 321 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
index 25f0c696f42b..b0f22e042ec5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
@@ -29,8 +29,8 @@ import org.json4s.jackson.JsonMethods._
 import org.apache.spark.{SparkContext, Logging}
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.ml.param.{Param, ParamMap, Params}
-import org.apache.spark.ml.util.Reader
-import org.apache.spark.ml.util.Writer
+import org.apache.spark.ml.util.MLReader
+import org.apache.spark.ml.util.MLWriter
 import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.types.StructType
@@ -89,7 +89,7 @@ abstract class PipelineStage extends Params with Logging {
  * an identity transformer.
  */
 @Experimental
-class Pipeline(override val uid: String) extends Estimator[PipelineModel] with Writable {
+class Pipeline(override val uid: String) extends Estimator[PipelineModel] with MLWritable {
 
   def this() = this(Identifiable.randomUID("pipeline"))
 
@@ -174,16 +174,16 @@ class Pipeline(override val uid: String) extends Estimator[PipelineModel] with W
     theStages.foldLeft(schema)((cur, stage) => stage.transformSchema(cur))
   }
 
-  override def write: Writer = new Pipeline.PipelineWriter(this)
+  override def write: MLWriter = new Pipeline.PipelineWriter(this)
 }
 
-object Pipeline extends Readable[Pipeline] {
+object Pipeline extends MLReadable[Pipeline] {
 
-  override def read: Reader[Pipeline] = new PipelineReader
+  override def read: MLReader[Pipeline] = new PipelineReader
 
-  override def load(path: String): Pipeline = read.load(path)
+  override def load(path: String): Pipeline = super.load(path)
 
-  private[ml] class PipelineWriter(instance: Pipeline) extends Writer {
+  private[ml] class PipelineWriter(instance: Pipeline) extends MLWriter {
 
     SharedReadWrite.validateStages(instance.getStages)
 
@@ -191,7 +191,7 @@ object Pipeline extends Readable[Pipeline] {
       SharedReadWrite.saveImpl(instance, instance.getStages, sc, path)
   }
 
-  private[ml] class PipelineReader extends Reader[Pipeline] {
+  private[ml] class PipelineReader extends MLReader[Pipeline] {
 
     /** Checked against metadata when loading model */
     private val className = "org.apache.spark.ml.Pipeline"
@@ -202,7 +202,7 @@ object Pipeline extends Readable[Pipeline] {
     }
   }
 
-  /** Methods for [[Reader]] and [[Writer]] shared between [[Pipeline]] and [[PipelineModel]] */
+  /** Methods for [[MLReader]] and [[MLWriter]] shared between [[Pipeline]] and [[PipelineModel]] */
   private[ml] object SharedReadWrite {
 
     import org.json4s.JsonDSL._
@@ -210,7 +210,7 @@ object Pipeline extends Readable[Pipeline] {
     /** Check that all stages are Writable */
     def validateStages(stages: Array[PipelineStage]): Unit = {
       stages.foreach {
-        case stage: Writable => // good
+        case stage: MLWritable => // good
         case other =>
           throw new UnsupportedOperationException("Pipeline write will fail on this Pipeline" +
             s" because it contains a stage which does not implement Writable. Non-Writable stage:" +
@@ -245,7 +245,7 @@ object Pipeline extends Readable[Pipeline] {
 
       // Save stages
       val stagesDir = new Path(path, "stages").toString
-      stages.zipWithIndex.foreach { case (stage: Writable, idx: Int) =>
+      stages.zipWithIndex.foreach { case (stage: MLWritable, idx: Int) =>
         stage.write.save(getStagePath(stage.uid, idx, stages.length, stagesDir))
       }
     }
@@ -285,7 +285,7 @@ object Pipeline extends Readable[Pipeline] {
         val stagePath = SharedReadWrite.getStagePath(stageUid, idx, stageUids.length, stagesDir)
         val stageMetadata = DefaultParamsReader.loadMetadata(stagePath, sc)
         val cls = Utils.classForName(stageMetadata.className)
-        cls.getMethod("read").invoke(null).asInstanceOf[Reader[PipelineStage]].load(stagePath)
+        cls.getMethod("read").invoke(null).asInstanceOf[MLReader[PipelineStage]].load(stagePath)
       }
       (metadata.uid, stages)
     }
@@ -308,7 +308,7 @@ object Pipeline extends Readable[Pipeline] {
 class PipelineModel private[ml] (
     override val uid: String,
     val stages: Array[Transformer])
-  extends Model[PipelineModel] with Writable with Logging {
+  extends Model[PipelineModel] with MLWritable with Logging {
 
   /** A Java/Python-friendly auxiliary constructor. */
   private[ml] def this(uid: String, stages: ju.List[Transformer]) = {
@@ -333,18 +333,18 @@ class PipelineModel private[ml] (
     new PipelineModel(uid, stages.map(_.copy(extra))).setParent(parent)
   }
 
-  override def write: Writer = new PipelineModel.PipelineModelWriter(this)
+  override def write: MLWriter = new PipelineModel.PipelineModelWriter(this)
 }
 
-object PipelineModel extends Readable[PipelineModel] {
+object PipelineModel extends MLReadable[PipelineModel] {
 
   import Pipeline.SharedReadWrite
 
-  override def read: Reader[PipelineModel] = new PipelineModelReader
+  override def read: MLReader[PipelineModel] = new PipelineModelReader
 
-  override def load(path: String): PipelineModel = read.load(path)
+  override def load(path: String): PipelineModel = super.load(path)
 
-  private[ml] class PipelineModelWriter(instance: PipelineModel) extends Writer {
+  private[ml] class PipelineModelWriter(instance: PipelineModel) extends MLWriter {
 
     SharedReadWrite.validateStages(instance.stages.asInstanceOf[Array[PipelineStage]])
 
@@ -352,7 +352,7 @@ object PipelineModel extends Readable[PipelineModel] {
       instance.stages.asInstanceOf[Array[PipelineStage]], sc, path)
   }
 
-  private[ml] class PipelineModelReader extends Reader[PipelineModel] {
+  private[ml] class PipelineModelReader extends MLReader[PipelineModel] {
 
     /** Checked against metadata when loading model */
     private val className = "org.apache.spark.ml.PipelineModel"
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index 71c2533bcbf4..a3cc49f7f018 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -29,9 +29,9 @@ import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
 import org.apache.spark.ml.util._
+import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.linalg.BLAS._
-import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
 import org.apache.spark.mllib.stat.MultivariateOnlineSummarizer
 import org.apache.spark.mllib.util.MLUtils
 import org.apache.spark.rdd.RDD
@@ -157,7 +157,7 @@ private[classification] trait LogisticRegressionParams extends ProbabilisticClas
 @Experimental
 class LogisticRegression(override val uid: String)
   extends ProbabilisticClassifier[Vector, LogisticRegression, LogisticRegressionModel]
-  with LogisticRegressionParams with Writable with Logging {
+  with LogisticRegressionParams with DefaultParamsWritable with Logging {
 
   def this() = this(Identifiable.randomUID("logreg"))
 
@@ -385,12 +385,11 @@ class LogisticRegression(override val uid: String)
   }
 
   override def copy(extra: ParamMap): LogisticRegression = defaultCopy(extra)
-
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-object LogisticRegression extends Readable[LogisticRegression] {
-  override def read: Reader[LogisticRegression] = new DefaultParamsReader[LogisticRegression]
+object LogisticRegression extends DefaultParamsReadable[LogisticRegression] {
+
+  override def load(path: String): LogisticRegression = super.load(path)
 }
 
 /**
@@ -403,7 +402,7 @@ class LogisticRegressionModel private[ml] (
     val coefficients: Vector,
     val intercept: Double)
   extends ProbabilisticClassificationModel[Vector, LogisticRegressionModel]
-  with LogisticRegressionParams with Writable {
+  with LogisticRegressionParams with MLWritable {
 
   @deprecated("Use coefficients instead.", "1.6.0")
   def weights: Vector = coefficients
@@ -519,26 +518,26 @@ class LogisticRegressionModel private[ml] (
   }
 
   /**
-   * Returns a [[Writer]] instance for this ML instance.
+   * Returns a [[MLWriter]] instance for this ML instance.
    *
    * For [[LogisticRegressionModel]], this does NOT currently save the training [[summary]].
    * An option to save [[summary]] may be added in the future.
    *
    * This also does not save the [[parent]] currently.
    */
-  override def write: Writer = new LogisticRegressionModel.LogisticRegressionModelWriter(this)
+  override def write: MLWriter = new LogisticRegressionModel.LogisticRegressionModelWriter(this)
 }
 
 
-object LogisticRegressionModel extends Readable[LogisticRegressionModel] {
+object LogisticRegressionModel extends MLReadable[LogisticRegressionModel] {
 
-  override def read: Reader[LogisticRegressionModel] = new LogisticRegressionModelReader
+  override def read: MLReader[LogisticRegressionModel] = new LogisticRegressionModelReader
 
-  override def load(path: String): LogisticRegressionModel = read.load(path)
+  override def load(path: String): LogisticRegressionModel = super.load(path)
 
-  /** [[Writer]] instance for [[LogisticRegressionModel]] */
+  /** [[MLWriter]] instance for [[LogisticRegressionModel]] */
   private[classification] class LogisticRegressionModelWriter(instance: LogisticRegressionModel)
-    extends Writer with Logging {
+    extends MLWriter with Logging {
 
     private case class Data(
         numClasses: Int,
@@ -558,7 +557,7 @@ object LogisticRegressionModel extends Readable[LogisticRegressionModel] {
   }
 
   private[classification] class LogisticRegressionModelReader
-    extends Reader[LogisticRegressionModel] {
+    extends MLReader[LogisticRegressionModel] {
 
     /** Checked against metadata when loading model */
     private val className = "org.apache.spark.ml.classification.LogisticRegressionModel"
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
index e2be6547d8f0..63c06581482e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Binarizer.scala
@@ -33,7 +33,7 @@ import org.apache.spark.sql.types.{DoubleType, StructType}
  */
 @Experimental
 final class Binarizer(override val uid: String)
-  extends Transformer with Writable with HasInputCol with HasOutputCol {
+  extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("binarizer"))
 
@@ -86,17 +86,11 @@ final class Binarizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): Binarizer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object Binarizer extends Readable[Binarizer] {
-
-  @Since("1.6.0")
-  override def read: Reader[Binarizer] = new DefaultParamsReader[Binarizer]
+object Binarizer extends DefaultParamsReadable[Binarizer] {
 
   @Since("1.6.0")
-  override def load(path: String): Binarizer = read.load(path)
+  override def load(path: String): Binarizer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
index 7095fbd70aa0..324353a96afb 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Bucketizer.scala
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.{DoubleType, StructField, StructType}
  */
 @Experimental
 final class Bucketizer(override val uid: String)
-  extends Model[Bucketizer] with HasInputCol with HasOutputCol with Writable {
+  extends Model[Bucketizer] with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("bucketizer"))
 
@@ -93,12 +93,9 @@ final class Bucketizer(override val uid: String)
   override def copy(extra: ParamMap): Bucketizer = {
     defaultCopy[Bucketizer](extra).setParent(parent)
   }
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
-object Bucketizer extends Readable[Bucketizer] {
+object Bucketizer extends DefaultParamsReadable[Bucketizer] {
 
   /** We require splits to be of length >= 3 and to be in strictly increasing order. */
   private[feature] def checkSplits(splits: Array[Double]): Boolean = {
@@ -140,8 +137,5 @@ object Bucketizer extends Readable[Bucketizer] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[Bucketizer] = new DefaultParamsReader[Bucketizer]
-
-  @Since("1.6.0")
-  override def load(path: String): Bucketizer = read.load(path)
+  override def load(path: String): Bucketizer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
index 5ff9bfb7d111..4969cf42450d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
@@ -107,7 +107,7 @@ private[feature] trait CountVectorizerParams extends Params with HasInputCol wit
  */
 @Experimental
 class CountVectorizer(override val uid: String)
-  extends Estimator[CountVectorizerModel] with CountVectorizerParams with Writable {
+  extends Estimator[CountVectorizerModel] with CountVectorizerParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("cntVec"))
 
@@ -171,16 +171,10 @@ class CountVectorizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): CountVectorizer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object CountVectorizer extends Readable[CountVectorizer] {
-
-  @Since("1.6.0")
-  override def read: Reader[CountVectorizer] = new DefaultParamsReader
+object CountVectorizer extends DefaultParamsReadable[CountVectorizer] {
 
   @Since("1.6.0")
   override def load(path: String): CountVectorizer = super.load(path)
@@ -193,7 +187,7 @@ object CountVectorizer extends Readable[CountVectorizer] {
  */
 @Experimental
 class CountVectorizerModel(override val uid: String, val vocabulary: Array[String])
-  extends Model[CountVectorizerModel] with CountVectorizerParams with Writable {
+  extends Model[CountVectorizerModel] with CountVectorizerParams with MLWritable {
 
   import CountVectorizerModel._
 
@@ -251,14 +245,14 @@ class CountVectorizerModel(override val uid: String, val vocabulary: Array[Strin
   }
 
   @Since("1.6.0")
-  override def write: Writer = new CountVectorizerModelWriter(this)
+  override def write: MLWriter = new CountVectorizerModelWriter(this)
 }
 
 @Since("1.6.0")
-object CountVectorizerModel extends Readable[CountVectorizerModel] {
+object CountVectorizerModel extends MLReadable[CountVectorizerModel] {
 
   private[CountVectorizerModel]
-  class CountVectorizerModelWriter(instance: CountVectorizerModel) extends Writer {
+  class CountVectorizerModelWriter(instance: CountVectorizerModel) extends MLWriter {
 
     private case class Data(vocabulary: Seq[String])
 
@@ -270,7 +264,7 @@ object CountVectorizerModel extends Readable[CountVectorizerModel] {
     }
   }
 
-  private class CountVectorizerModelReader extends Reader[CountVectorizerModel] {
+  private class CountVectorizerModelReader extends MLReader[CountVectorizerModel] {
 
     private val className = "org.apache.spark.ml.feature.CountVectorizerModel"
 
@@ -288,7 +282,7 @@ object CountVectorizerModel extends Readable[CountVectorizerModel] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[CountVectorizerModel] = new CountVectorizerModelReader
+  override def read: MLReader[CountVectorizerModel] = new CountVectorizerModelReader
 
   @Since("1.6.0")
   override def load(path: String): CountVectorizerModel = super.load(path)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
index 6ea5a616173e..6bed72164a1d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/DCT.scala
@@ -37,7 +37,7 @@ import org.apache.spark.sql.types.DataType
  */
 @Experimental
 class DCT(override val uid: String)
-  extends UnaryTransformer[Vector, Vector, DCT] with Writable {
+  extends UnaryTransformer[Vector, Vector, DCT] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("dct"))
 
@@ -69,17 +69,11 @@ class DCT(override val uid: String)
   }
 
   override protected def outputDataType: DataType = new VectorUDT
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object DCT extends Readable[DCT] {
-
-  @Since("1.6.0")
-  override def read: Reader[DCT] = new DefaultParamsReader[DCT]
+object DCT extends DefaultParamsReadable[DCT] {
 
   @Since("1.6.0")
-  override def load(path: String): DCT = read.load(path)
+  override def load(path: String): DCT = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
index 6d2ea675f561..9e15835429a3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/HashingTF.scala
@@ -34,7 +34,7 @@ import org.apache.spark.sql.types.{ArrayType, StructType}
  */
 @Experimental
 class HashingTF(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol with Writable {
+  extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("hashingTF"))
 
@@ -77,17 +77,11 @@ class HashingTF(override val uid: String)
   }
 
   override def copy(extra: ParamMap): HashingTF = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object HashingTF extends Readable[HashingTF] {
-
-  @Since("1.6.0")
-  override def read: Reader[HashingTF] = new DefaultParamsReader[HashingTF]
+object HashingTF extends DefaultParamsReadable[HashingTF] {
 
   @Since("1.6.0")
-  override def load(path: String): HashingTF = read.load(path)
+  override def load(path: String): HashingTF = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
index 53ad34ef1264..0e00ef6f2ee2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
@@ -62,7 +62,8 @@ private[feature] trait IDFBase extends Params with HasInputCol with HasOutputCol
  * Compute the Inverse Document Frequency (IDF) given a collection of documents.
  */
 @Experimental
-final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBase with Writable {
+final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBase
+  with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("idf"))
 
@@ -87,16 +88,10 @@ final class IDF(override val uid: String) extends Estimator[IDFModel] with IDFBa
   }
 
   override def copy(extra: ParamMap): IDF = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object IDF extends Readable[IDF] {
-
-  @Since("1.6.0")
-  override def read: Reader[IDF] = new DefaultParamsReader
+object IDF extends DefaultParamsReadable[IDF] {
 
   @Since("1.6.0")
   override def load(path: String): IDF = super.load(path)
@@ -110,7 +105,7 @@ object IDF extends Readable[IDF] {
 class IDFModel private[ml] (
     override val uid: String,
     idfModel: feature.IDFModel)
-  extends Model[IDFModel] with IDFBase with Writable {
+  extends Model[IDFModel] with IDFBase with MLWritable {
 
   import IDFModel._
 
@@ -140,13 +135,13 @@ class IDFModel private[ml] (
   def idf: Vector = idfModel.idf
 
   @Since("1.6.0")
-  override def write: Writer = new IDFModelWriter(this)
+  override def write: MLWriter = new IDFModelWriter(this)
 }
 
 @Since("1.6.0")
-object IDFModel extends Readable[IDFModel] {
+object IDFModel extends MLReadable[IDFModel] {
 
-  private[IDFModel] class IDFModelWriter(instance: IDFModel) extends Writer {
+  private[IDFModel] class IDFModelWriter(instance: IDFModel) extends MLWriter {
 
     private case class Data(idf: Vector)
 
@@ -158,7 +153,7 @@ object IDFModel extends Readable[IDFModel] {
     }
   }
 
-  private class IDFModelReader extends Reader[IDFModel] {
+  private class IDFModelReader extends MLReader[IDFModel] {
 
     private val className = "org.apache.spark.ml.feature.IDFModel"
 
@@ -176,7 +171,7 @@ object IDFModel extends Readable[IDFModel] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[IDFModel] = new IDFModelReader
+  override def read: MLReader[IDFModel] = new IDFModelReader
 
   @Since("1.6.0")
   override def load(path: String): IDFModel = super.load(path)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
index 9df6b311cc9d..2181119f04a5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Interaction.scala
@@ -45,7 +45,7 @@ import org.apache.spark.sql.types._
 @Since("1.6.0")
 @Experimental
 class Interaction @Since("1.6.0") (override val uid: String) extends Transformer
-  with HasInputCols with HasOutputCol with Writable {
+  with HasInputCols with HasOutputCol with DefaultParamsWritable {
 
   @Since("1.6.0")
   def this() = this(Identifiable.randomUID("interaction"))
@@ -224,19 +224,13 @@ class Interaction @Since("1.6.0") (override val uid: String) extends Transformer
     require($(inputCols).length > 0, "Input cols must have non-zero length.")
     require($(inputCols).distinct.length == $(inputCols).length, "Input cols must be distinct.")
   }
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object Interaction extends Readable[Interaction] {
-
-  @Since("1.6.0")
-  override def read: Reader[Interaction] = new DefaultParamsReader[Interaction]
+object Interaction extends DefaultParamsReadable[Interaction] {
 
   @Since("1.6.0")
-  override def load(path: String): Interaction = read.load(path)
+  override def load(path: String): Interaction = super.load(path)
 }
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
index 24d964fae834..ed24eabb5044 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
@@ -88,7 +88,7 @@ private[feature] trait MinMaxScalerParams extends Params with HasInputCol with H
  */
 @Experimental
 class MinMaxScaler(override val uid: String)
-  extends Estimator[MinMaxScalerModel] with MinMaxScalerParams with Writable {
+  extends Estimator[MinMaxScalerModel] with MinMaxScalerParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("minMaxScal"))
 
@@ -118,16 +118,10 @@ class MinMaxScaler(override val uid: String)
   }
 
   override def copy(extra: ParamMap): MinMaxScaler = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object MinMaxScaler extends Readable[MinMaxScaler] {
-
-  @Since("1.6.0")
-  override def read: Reader[MinMaxScaler] = new DefaultParamsReader
+object MinMaxScaler extends DefaultParamsReadable[MinMaxScaler] {
 
   @Since("1.6.0")
   override def load(path: String): MinMaxScaler = super.load(path)
@@ -147,7 +141,7 @@ class MinMaxScalerModel private[ml] (
     override val uid: String,
     val originalMin: Vector,
     val originalMax: Vector)
-  extends Model[MinMaxScalerModel] with MinMaxScalerParams with Writable {
+  extends Model[MinMaxScalerModel] with MinMaxScalerParams with MLWritable {
 
   import MinMaxScalerModel._
 
@@ -195,14 +189,14 @@ class MinMaxScalerModel private[ml] (
   }
 
   @Since("1.6.0")
-  override def write: Writer = new MinMaxScalerModelWriter(this)
+  override def write: MLWriter = new MinMaxScalerModelWriter(this)
 }
 
 @Since("1.6.0")
-object MinMaxScalerModel extends Readable[MinMaxScalerModel] {
+object MinMaxScalerModel extends MLReadable[MinMaxScalerModel] {
 
   private[MinMaxScalerModel]
-  class MinMaxScalerModelWriter(instance: MinMaxScalerModel) extends Writer {
+  class MinMaxScalerModelWriter(instance: MinMaxScalerModel) extends MLWriter {
 
     private case class Data(originalMin: Vector, originalMax: Vector)
 
@@ -214,7 +208,7 @@ object MinMaxScalerModel extends Readable[MinMaxScalerModel] {
     }
   }
 
-  private class MinMaxScalerModelReader extends Reader[MinMaxScalerModel] {
+  private class MinMaxScalerModelReader extends MLReader[MinMaxScalerModel] {
 
     private val className = "org.apache.spark.ml.feature.MinMaxScalerModel"
 
@@ -231,7 +225,7 @@ object MinMaxScalerModel extends Readable[MinMaxScalerModel] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[MinMaxScalerModel] = new MinMaxScalerModelReader
+  override def read: MLReader[MinMaxScalerModel] = new MinMaxScalerModelReader
 
   @Since("1.6.0")
   override def load(path: String): MinMaxScalerModel = super.load(path)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
index 4a17acd95199..65414ecbefbb 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/NGram.scala
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
  */
 @Experimental
 class NGram(override val uid: String)
-  extends UnaryTransformer[Seq[String], Seq[String], NGram] with Writable {
+  extends UnaryTransformer[Seq[String], Seq[String], NGram] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("ngram"))
 
@@ -66,17 +66,11 @@ class NGram(override val uid: String)
   }
 
   override protected def outputDataType: DataType = new ArrayType(StringType, false)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object NGram extends Readable[NGram] {
-
-  @Since("1.6.0")
-  override def read: Reader[NGram] = new DefaultParamsReader[NGram]
+object NGram extends DefaultParamsReadable[NGram] {
 
   @Since("1.6.0")
-  override def load(path: String): NGram = read.load(path)
+  override def load(path: String): NGram = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
index 9df6a091d505..c2d514fd9629 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Normalizer.scala
@@ -31,7 +31,7 @@ import org.apache.spark.sql.types.DataType
  */
 @Experimental
 class Normalizer(override val uid: String)
-  extends UnaryTransformer[Vector, Vector, Normalizer] with Writable {
+  extends UnaryTransformer[Vector, Vector, Normalizer] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("normalizer"))
 
@@ -56,17 +56,11 @@ class Normalizer(override val uid: String)
   }
 
   override protected def outputDataType: DataType = new VectorUDT()
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object Normalizer extends Readable[Normalizer] {
-
-  @Since("1.6.0")
-  override def read: Reader[Normalizer] = new DefaultParamsReader[Normalizer]
+object Normalizer extends DefaultParamsReadable[Normalizer] {
 
   @Since("1.6.0")
-  override def load(path: String): Normalizer = read.load(path)
+  override def load(path: String): Normalizer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
index 4e2adfaafa21..d70164eaf022 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/OneHotEncoder.scala
@@ -44,7 +44,7 @@ import org.apache.spark.sql.types.{DoubleType, StructType}
  */
 @Experimental
 class OneHotEncoder(override val uid: String) extends Transformer
-  with HasInputCol with HasOutputCol with Writable {
+  with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("oneHot"))
 
@@ -165,17 +165,11 @@ class OneHotEncoder(override val uid: String) extends Transformer
   }
 
   override def copy(extra: ParamMap): OneHotEncoder = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object OneHotEncoder extends Readable[OneHotEncoder] {
-
-  @Since("1.6.0")
-  override def read: Reader[OneHotEncoder] = new DefaultParamsReader[OneHotEncoder]
+object OneHotEncoder extends DefaultParamsReadable[OneHotEncoder] {
 
   @Since("1.6.0")
-  override def load(path: String): OneHotEncoder = read.load(path)
+  override def load(path: String): OneHotEncoder = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
index 49415398325f..08610593fadd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/PolynomialExpansion.scala
@@ -36,7 +36,7 @@ import org.apache.spark.sql.types.DataType
  */
 @Experimental
 class PolynomialExpansion(override val uid: String)
-  extends UnaryTransformer[Vector, Vector, PolynomialExpansion] with Writable {
+  extends UnaryTransformer[Vector, Vector, PolynomialExpansion] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("poly"))
 
@@ -63,9 +63,6 @@ class PolynomialExpansion(override val uid: String)
   override protected def outputDataType: DataType = new VectorUDT()
 
   override def copy(extra: ParamMap): PolynomialExpansion = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 /**
@@ -81,7 +78,7 @@ class PolynomialExpansion(override val uid: String)
  * current index and increment it properly for sparse input.
  */
 @Since("1.6.0")
-object PolynomialExpansion extends Readable[PolynomialExpansion] {
+object PolynomialExpansion extends DefaultParamsReadable[PolynomialExpansion] {
 
   private def choose(n: Int, k: Int): Int = {
     Range(n, n - k, -1).product / Range(k, 1, -1).product
@@ -182,8 +179,5 @@ object PolynomialExpansion extends Readable[PolynomialExpansion] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[PolynomialExpansion] = new DefaultParamsReader[PolynomialExpansion]
-
-  @Since("1.6.0")
-  override def load(path: String): PolynomialExpansion = read.load(path)
+  override def load(path: String): PolynomialExpansion = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
index 2da5c966d296..7bf67c6325a3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala
@@ -60,7 +60,7 @@ private[feature] trait QuantileDiscretizerBase extends Params with HasInputCol w
  */
 @Experimental
 final class QuantileDiscretizer(override val uid: String)
-  extends Estimator[Bucketizer] with QuantileDiscretizerBase with Writable {
+  extends Estimator[Bucketizer] with QuantileDiscretizerBase with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("quantileDiscretizer"))
 
@@ -93,13 +93,10 @@ final class QuantileDiscretizer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): QuantileDiscretizer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object QuantileDiscretizer extends Readable[QuantileDiscretizer] with Logging {
+object QuantileDiscretizer extends DefaultParamsReadable[QuantileDiscretizer] with Logging {
   /**
    * Sampling from the given dataset to collect quantile statistics.
    */
@@ -179,8 +176,5 @@ object QuantileDiscretizer extends Readable[QuantileDiscretizer] with Logging {
   }
 
   @Since("1.6.0")
-  override def read: Reader[QuantileDiscretizer] = new DefaultParamsReader[QuantileDiscretizer]
-
-  @Since("1.6.0")
-  override def load(path: String): QuantileDiscretizer = read.load(path)
+  override def load(path: String): QuantileDiscretizer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
index c115064ff301..3a735017ba83 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/SQLTransformer.scala
@@ -33,7 +33,8 @@ import org.apache.spark.sql.types.StructType
  */
 @Experimental
 @Since("1.6.0")
-class SQLTransformer @Since("1.6.0") (override val uid: String) extends Transformer with Writable {
+class SQLTransformer @Since("1.6.0") (override val uid: String) extends Transformer
+  with DefaultParamsWritable {
 
   @Since("1.6.0")
   def this() = this(Identifiable.randomUID("sql"))
@@ -77,17 +78,11 @@ class SQLTransformer @Since("1.6.0") (override val uid: String) extends Transfor
 
   @Since("1.6.0")
   override def copy(extra: ParamMap): SQLTransformer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object SQLTransformer extends Readable[SQLTransformer] {
-
-  @Since("1.6.0")
-  override def read: Reader[SQLTransformer] = new DefaultParamsReader[SQLTransformer]
+object SQLTransformer extends DefaultParamsReadable[SQLTransformer] {
 
   @Since("1.6.0")
-  override def load(path: String): SQLTransformer = read.load(path)
+  override def load(path: String): SQLTransformer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
index ab04e5418dd4..1f689c1da1ba 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
@@ -59,7 +59,7 @@ private[feature] trait StandardScalerParams extends Params with HasInputCol with
  */
 @Experimental
 class StandardScaler(override val uid: String) extends Estimator[StandardScalerModel]
-  with StandardScalerParams with Writable {
+  with StandardScalerParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("stdScal"))
 
@@ -96,16 +96,10 @@ class StandardScaler(override val uid: String) extends Estimator[StandardScalerM
   }
 
   override def copy(extra: ParamMap): StandardScaler = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object StandardScaler extends Readable[StandardScaler] {
-
-  @Since("1.6.0")
-  override def read: Reader[StandardScaler] = new DefaultParamsReader
+object StandardScaler extends DefaultParamsReadable[StandardScaler] {
 
   @Since("1.6.0")
   override def load(path: String): StandardScaler = super.load(path)
@@ -119,7 +113,7 @@ object StandardScaler extends Readable[StandardScaler] {
 class StandardScalerModel private[ml] (
     override val uid: String,
     scaler: feature.StandardScalerModel)
-  extends Model[StandardScalerModel] with StandardScalerParams with Writable {
+  extends Model[StandardScalerModel] with StandardScalerParams with MLWritable {
 
   import StandardScalerModel._
 
@@ -165,14 +159,14 @@ class StandardScalerModel private[ml] (
   }
 
   @Since("1.6.0")
-  override def write: Writer = new StandardScalerModelWriter(this)
+  override def write: MLWriter = new StandardScalerModelWriter(this)
 }
 
 @Since("1.6.0")
-object StandardScalerModel extends Readable[StandardScalerModel] {
+object StandardScalerModel extends MLReadable[StandardScalerModel] {
 
   private[StandardScalerModel]
-  class StandardScalerModelWriter(instance: StandardScalerModel) extends Writer {
+  class StandardScalerModelWriter(instance: StandardScalerModel) extends MLWriter {
 
     private case class Data(std: Vector, mean: Vector, withStd: Boolean, withMean: Boolean)
 
@@ -184,7 +178,7 @@ object StandardScalerModel extends Readable[StandardScalerModel] {
     }
   }
 
-  private class StandardScalerModelReader extends Reader[StandardScalerModel] {
+  private class StandardScalerModelReader extends MLReader[StandardScalerModel] {
 
     private val className = "org.apache.spark.ml.feature.StandardScalerModel"
 
@@ -204,7 +198,7 @@ object StandardScalerModel extends Readable[StandardScalerModel] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[StandardScalerModel] = new StandardScalerModelReader
+  override def read: MLReader[StandardScalerModel] = new StandardScalerModelReader
 
   @Since("1.6.0")
   override def load(path: String): StandardScalerModel = super.load(path)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
index f1146988dcc7..318808596dc6 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StopWordsRemover.scala
@@ -86,7 +86,7 @@ private[spark] object StopWords {
  */
 @Experimental
 class StopWordsRemover(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol with Writable {
+  extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("stopWords"))
 
@@ -154,17 +154,11 @@ class StopWordsRemover(override val uid: String)
   }
 
   override def copy(extra: ParamMap): StopWordsRemover = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object StopWordsRemover extends Readable[StopWordsRemover] {
-
-  @Since("1.6.0")
-  override def read: Reader[StopWordsRemover] = new DefaultParamsReader[StopWordsRemover]
+object StopWordsRemover extends DefaultParamsReadable[StopWordsRemover] {
 
   @Since("1.6.0")
-  override def load(path: String): StopWordsRemover = read.load(path)
+  override def load(path: String): StopWordsRemover = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
index f16f6afc002d..97a2e4f6d6ca 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
@@ -65,7 +65,7 @@ private[feature] trait StringIndexerBase extends Params with HasInputCol with Ha
  */
 @Experimental
 class StringIndexer(override val uid: String) extends Estimator[StringIndexerModel]
-  with StringIndexerBase with Writable {
+  with StringIndexerBase with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("strIdx"))
 
@@ -93,16 +93,10 @@ class StringIndexer(override val uid: String) extends Estimator[StringIndexerMod
   }
 
   override def copy(extra: ParamMap): StringIndexer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object StringIndexer extends Readable[StringIndexer] {
-
-  @Since("1.6.0")
-  override def read: Reader[StringIndexer] = new DefaultParamsReader
+object StringIndexer extends DefaultParamsReadable[StringIndexer] {
 
   @Since("1.6.0")
   override def load(path: String): StringIndexer = super.load(path)
@@ -122,7 +116,7 @@ object StringIndexer extends Readable[StringIndexer] {
 class StringIndexerModel (
     override val uid: String,
     val labels: Array[String])
-  extends Model[StringIndexerModel] with StringIndexerBase with Writable {
+  extends Model[StringIndexerModel] with StringIndexerBase with MLWritable {
 
   import StringIndexerModel._
 
@@ -199,10 +193,10 @@ class StringIndexerModel (
 }
 
 @Since("1.6.0")
-object StringIndexerModel extends Readable[StringIndexerModel] {
+object StringIndexerModel extends MLReadable[StringIndexerModel] {
 
   private[StringIndexerModel]
-  class StringIndexModelWriter(instance: StringIndexerModel) extends Writer {
+  class StringIndexModelWriter(instance: StringIndexerModel) extends MLWriter {
 
     private case class Data(labels: Array[String])
 
@@ -214,7 +208,7 @@ object StringIndexerModel extends Readable[StringIndexerModel] {
     }
   }
 
-  private class StringIndexerModelReader extends Reader[StringIndexerModel] {
+  private class StringIndexerModelReader extends MLReader[StringIndexerModel] {
 
     private val className = "org.apache.spark.ml.feature.StringIndexerModel"
 
@@ -232,7 +226,7 @@ object StringIndexerModel extends Readable[StringIndexerModel] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[StringIndexerModel] = new StringIndexerModelReader
+  override def read: MLReader[StringIndexerModel] = new StringIndexerModelReader
 
   @Since("1.6.0")
   override def load(path: String): StringIndexerModel = super.load(path)
@@ -249,7 +243,7 @@ object StringIndexerModel extends Readable[StringIndexerModel] {
  */
 @Experimental
 class IndexToString private[ml] (override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol with Writable {
+  extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() =
     this(Identifiable.randomUID("idxToStr"))
@@ -316,17 +310,11 @@ class IndexToString private[ml] (override val uid: String)
   override def copy(extra: ParamMap): IndexToString = {
     defaultCopy(extra)
   }
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object IndexToString extends Readable[IndexToString] {
-
-  @Since("1.6.0")
-  override def read: Reader[IndexToString] = new DefaultParamsReader[IndexToString]
+object IndexToString extends DefaultParamsReadable[IndexToString] {
 
   @Since("1.6.0")
-  override def load(path: String): IndexToString = read.load(path)
+  override def load(path: String): IndexToString = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
index 0e4445d1e2fa..8ad7bbedaab5 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Tokenizer.scala
@@ -31,7 +31,7 @@ import org.apache.spark.sql.types.{ArrayType, DataType, StringType}
  */
 @Experimental
 class Tokenizer(override val uid: String)
-  extends UnaryTransformer[String, Seq[String], Tokenizer] with Writable {
+  extends UnaryTransformer[String, Seq[String], Tokenizer] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("tok"))
 
@@ -46,19 +46,13 @@ class Tokenizer(override val uid: String)
   override protected def outputDataType: DataType = new ArrayType(StringType, true)
 
   override def copy(extra: ParamMap): Tokenizer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object Tokenizer extends Readable[Tokenizer] {
-
-  @Since("1.6.0")
-  override def read: Reader[Tokenizer] = new DefaultParamsReader[Tokenizer]
+object Tokenizer extends DefaultParamsReadable[Tokenizer] {
 
   @Since("1.6.0")
-  override def load(path: String): Tokenizer = read.load(path)
+  override def load(path: String): Tokenizer = super.load(path)
 }
 
 /**
@@ -70,7 +64,7 @@ object Tokenizer extends Readable[Tokenizer] {
  */
 @Experimental
 class RegexTokenizer(override val uid: String)
-  extends UnaryTransformer[String, Seq[String], RegexTokenizer] with Writable {
+  extends UnaryTransformer[String, Seq[String], RegexTokenizer] with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("regexTok"))
 
@@ -145,17 +139,11 @@ class RegexTokenizer(override val uid: String)
   override protected def outputDataType: DataType = new ArrayType(StringType, true)
 
   override def copy(extra: ParamMap): RegexTokenizer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object RegexTokenizer extends Readable[RegexTokenizer] {
-
-  @Since("1.6.0")
-  override def read: Reader[RegexTokenizer] = new DefaultParamsReader[RegexTokenizer]
+object RegexTokenizer extends DefaultParamsReadable[RegexTokenizer] {
 
   @Since("1.6.0")
-  override def load(path: String): RegexTokenizer = read.load(path)
+  override def load(path: String): RegexTokenizer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
index 7e54205292ca..0feec0549852 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
@@ -37,7 +37,7 @@ import org.apache.spark.sql.types._
  */
 @Experimental
 class VectorAssembler(override val uid: String)
-  extends Transformer with HasInputCols with HasOutputCol with Writable {
+  extends Transformer with HasInputCols with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("vecAssembler"))
 
@@ -120,19 +120,13 @@ class VectorAssembler(override val uid: String)
   }
 
   override def copy(extra: ParamMap): VectorAssembler = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object VectorAssembler extends Readable[VectorAssembler] {
-
-  @Since("1.6.0")
-  override def read: Reader[VectorAssembler] = new DefaultParamsReader[VectorAssembler]
+object VectorAssembler extends DefaultParamsReadable[VectorAssembler] {
 
   @Since("1.6.0")
-  override def load(path: String): VectorAssembler = read.load(path)
+  override def load(path: String): VectorAssembler = super.load(path)
 
   private[feature] def assemble(vv: Any*): Vector = {
     val indices = ArrayBuilder.make[Int]
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
index 911582b55b57..5410a50bc2e4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorSlicer.scala
@@ -42,7 +42,7 @@ import org.apache.spark.sql.types.StructType
  */
 @Experimental
 final class VectorSlicer(override val uid: String)
-  extends Transformer with HasInputCol with HasOutputCol with Writable {
+  extends Transformer with HasInputCol with HasOutputCol with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("vectorSlicer"))
 
@@ -151,13 +151,10 @@ final class VectorSlicer(override val uid: String)
   }
 
   override def copy(extra: ParamMap): VectorSlicer = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object VectorSlicer extends Readable[VectorSlicer] {
+object VectorSlicer extends DefaultParamsReadable[VectorSlicer] {
 
   /** Return true if given feature indices are valid */
   private[feature] def validIndices(indices: Array[Int]): Boolean = {
@@ -174,8 +171,5 @@ object VectorSlicer extends Readable[VectorSlicer] {
   }
 
   @Since("1.6.0")
-  override def read: Reader[VectorSlicer] = new DefaultParamsReader[VectorSlicer]
-
-  @Since("1.6.0")
-  override def load(path: String): VectorSlicer = read.load(path)
+  override def load(path: String): VectorSlicer = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index d92514d2e239..795b73c4c212 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -185,7 +185,7 @@ class ALSModel private[ml] (
     val rank: Int,
     @transient val userFactors: DataFrame,
     @transient val itemFactors: DataFrame)
-  extends Model[ALSModel] with ALSModelParams with Writable {
+  extends Model[ALSModel] with ALSModelParams with MLWritable {
 
   /** @group setParam */
   def setUserCol(value: String): this.type = set(userCol, value)
@@ -225,19 +225,19 @@ class ALSModel private[ml] (
   }
 
   @Since("1.6.0")
-  override def write: Writer = new ALSModel.ALSModelWriter(this)
+  override def write: MLWriter = new ALSModel.ALSModelWriter(this)
 }
 
 @Since("1.6.0")
-object ALSModel extends Readable[ALSModel] {
+object ALSModel extends MLReadable[ALSModel] {
 
   @Since("1.6.0")
-  override def read: Reader[ALSModel] = new ALSModelReader
+  override def read: MLReader[ALSModel] = new ALSModelReader
 
   @Since("1.6.0")
-  override def load(path: String): ALSModel = read.load(path)
+  override def load(path: String): ALSModel = super.load(path)
 
-  private[recommendation] class ALSModelWriter(instance: ALSModel) extends Writer {
+  private[recommendation] class ALSModelWriter(instance: ALSModel) extends MLWriter {
 
     override protected def saveImpl(path: String): Unit = {
       val extraMetadata = render("rank" -> instance.rank)
@@ -249,7 +249,7 @@ object ALSModel extends Readable[ALSModel] {
     }
   }
 
-  private[recommendation] class ALSModelReader extends Reader[ALSModel] {
+  private[recommendation] class ALSModelReader extends MLReader[ALSModel] {
 
     /** Checked against metadata when loading model */
     private val className = "org.apache.spark.ml.recommendation.ALSModel"
@@ -309,7 +309,8 @@ object ALSModel extends Readable[ALSModel] {
  * preferences rather than explicit ratings given to items.
  */
 @Experimental
-class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams with Writable {
+class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams
+  with DefaultParamsWritable {
 
   import org.apache.spark.ml.recommendation.ALS.Rating
 
@@ -391,9 +392,6 @@ class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams w
   }
 
   override def copy(extra: ParamMap): ALS = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 
@@ -406,7 +404,7 @@ class ALS(override val uid: String) extends Estimator[ALSModel] with ALSParams w
  * than 2 billion.
  */
 @DeveloperApi
-object ALS extends Readable[ALS] with Logging {
+object ALS extends DefaultParamsReadable[ALS] with Logging {
 
   /**
    * :: DeveloperApi ::
@@ -416,10 +414,7 @@ object ALS extends Readable[ALS] with Logging {
   case class Rating[@specialized(Int, Long) ID](user: ID, item: ID, rating: Float)
 
   @Since("1.6.0")
-  override def read: Reader[ALS] = new DefaultParamsReader[ALS]
-
-  @Since("1.6.0")
-  override def load(path: String): ALS = read.load(path)
+  override def load(path: String): ALS = super.load(path)
 
   /** Trait for least squares solvers applied to the normal equation. */
   private[recommendation] trait LeastSquaresNESolver extends Serializable {
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index f7c44f0a51b8..7ba1a60edaf7 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -66,7 +66,7 @@ private[regression] trait LinearRegressionParams extends PredictorParams
 @Experimental
 class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String)
   extends Regressor[Vector, LinearRegression, LinearRegressionModel]
-  with LinearRegressionParams with Writable with Logging {
+  with LinearRegressionParams with DefaultParamsWritable with Logging {
 
   @Since("1.4.0")
   def this() = this(Identifiable.randomUID("linReg"))
@@ -345,19 +345,13 @@ class LinearRegression @Since("1.3.0") (@Since("1.3.0") override val uid: String
 
   @Since("1.4.0")
   override def copy(extra: ParamMap): LinearRegression = defaultCopy(extra)
-
-  @Since("1.6.0")
-  override def write: Writer = new DefaultParamsWriter(this)
 }
 
 @Since("1.6.0")
-object LinearRegression extends Readable[LinearRegression] {
-
-  @Since("1.6.0")
-  override def read: Reader[LinearRegression] = new DefaultParamsReader[LinearRegression]
+object LinearRegression extends DefaultParamsReadable[LinearRegression] {
 
   @Since("1.6.0")
-  override def load(path: String): LinearRegression = read.load(path)
+  override def load(path: String): LinearRegression = super.load(path)
 }
 
 /**
@@ -371,7 +365,7 @@ class LinearRegressionModel private[ml] (
     val coefficients: Vector,
     val intercept: Double)
   extends RegressionModel[Vector, LinearRegressionModel]
-  with LinearRegressionParams with Writable {
+  with LinearRegressionParams with MLWritable {
 
   private var trainingSummary: Option[LinearRegressionTrainingSummary] = None
 
@@ -441,7 +435,7 @@ class LinearRegressionModel private[ml] (
   }
 
   /**
-   * Returns a [[Writer]] instance for this ML instance.
+   * Returns a [[MLWriter]] instance for this ML instance.
    *
    * For [[LinearRegressionModel]], this does NOT currently save the training [[summary]].
    * An option to save [[summary]] may be added in the future.
@@ -449,21 +443,21 @@ class LinearRegressionModel private[ml] (
    * This also does not save the [[parent]] currently.
    */
   @Since("1.6.0")
-  override def write: Writer = new LinearRegressionModel.LinearRegressionModelWriter(this)
+  override def write: MLWriter = new LinearRegressionModel.LinearRegressionModelWriter(this)
 }
 
 @Since("1.6.0")
-object LinearRegressionModel extends Readable[LinearRegressionModel] {
+object LinearRegressionModel extends MLReadable[LinearRegressionModel] {
 
   @Since("1.6.0")
-  override def read: Reader[LinearRegressionModel] = new LinearRegressionModelReader
+  override def read: MLReader[LinearRegressionModel] = new LinearRegressionModelReader
 
   @Since("1.6.0")
-  override def load(path: String): LinearRegressionModel = read.load(path)
+  override def load(path: String): LinearRegressionModel = super.load(path)
 
-  /** [[Writer]] instance for [[LinearRegressionModel]] */
+  /** [[MLWriter]] instance for [[LinearRegressionModel]] */
   private[LinearRegressionModel] class LinearRegressionModelWriter(instance: LinearRegressionModel)
-    extends Writer with Logging {
+    extends MLWriter with Logging {
 
     private case class Data(intercept: Double, coefficients: Vector)
 
@@ -477,7 +471,7 @@ object LinearRegressionModel extends Readable[LinearRegressionModel] {
     }
   }
 
-  private class LinearRegressionModelReader extends Reader[LinearRegressionModel] {
+  private class LinearRegressionModelReader extends MLReader[LinearRegressionModel] {
 
     /** Checked against metadata when loading model */
     private val className = "org.apache.spark.ml.regression.LinearRegressionModel"
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index d8ce907af532..ff9322dba122 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -31,7 +31,7 @@ import org.apache.spark.sql.SQLContext
 import org.apache.spark.util.Utils
 
 /**
- * Trait for [[Writer]] and [[Reader]].
+ * Trait for [[MLWriter]] and [[MLReader]].
  */
 private[util] sealed trait BaseReadWrite {
   private var optionSQLContext: Option[SQLContext] = None
@@ -64,7 +64,7 @@ private[util] sealed trait BaseReadWrite {
  */
 @Experimental
 @Since("1.6.0")
-abstract class Writer extends BaseReadWrite with Logging {
+abstract class MLWriter extends BaseReadWrite with Logging {
 
   protected var shouldOverwrite: Boolean = false
 
@@ -111,16 +111,16 @@ abstract class Writer extends BaseReadWrite with Logging {
 }
 
 /**
- * Trait for classes that provide [[Writer]].
+ * Trait for classes that provide [[MLWriter]].
  */
 @Since("1.6.0")
-trait Writable {
+trait MLWritable {
 
   /**
-   * Returns a [[Writer]] instance for this ML instance.
+   * Returns an [[MLWriter]] instance for this ML instance.
    */
   @Since("1.6.0")
-  def write: Writer
+  def write: MLWriter
 
   /**
    * Saves this ML instance to the input path, a shortcut of `write.save(path)`.
@@ -130,13 +130,18 @@ trait Writable {
   def save(path: String): Unit = write.save(path)
 }
 
+private[ml] trait DefaultParamsWritable extends MLWritable { self: Params =>
+
+  override def write: MLWriter = new DefaultParamsWriter(this)
+}
+
 /**
  * Abstract class for utility classes that can load ML instances.
  * @tparam T ML instance type
  */
 @Experimental
 @Since("1.6.0")
-abstract class Reader[T] extends BaseReadWrite {
+abstract class MLReader[T] extends BaseReadWrite {
 
   /**
    * Loads the ML component from the input path.
@@ -149,18 +154,18 @@ abstract class Reader[T] extends BaseReadWrite {
 }
 
 /**
- * Trait for objects that provide [[Reader]].
+ * Trait for objects that provide [[MLReader]].
  * @tparam T ML instance type
  */
 @Experimental
 @Since("1.6.0")
-trait Readable[T] {
+trait MLReadable[T] {
 
   /**
-   * Returns a [[Reader]] instance for this class.
+   * Returns an [[MLReader]] instance for this class.
    */
   @Since("1.6.0")
-  def read: Reader[T]
+  def read: MLReader[T]
 
   /**
    * Reads an ML instance from the input path, a shortcut of `read.load(path)`.
@@ -171,13 +176,18 @@ trait Readable[T] {
   def load(path: String): T = read.load(path)
 }
 
+private[ml] trait DefaultParamsReadable[T] extends MLReadable[T] {
+
+  override def read: MLReader[T] = new DefaultParamsReader
+}
+
 /**
- * Default [[Writer]] implementation for transformers and estimators that contain basic
+ * Default [[MLWriter]] implementation for transformers and estimators that contain basic
  * (json4s-serializable) params and no data. This will not handle more complex params or types with
  * data (e.g., models with coefficients).
  * @param instance object to save
  */
-private[ml] class DefaultParamsWriter(instance: Params) extends Writer {
+private[ml] class DefaultParamsWriter(instance: Params) extends MLWriter {
 
   override protected def saveImpl(path: String): Unit = {
     DefaultParamsWriter.saveMetadata(instance, path, sc)
@@ -218,13 +228,13 @@ private[ml] object DefaultParamsWriter {
 }
 
 /**
- * Default [[Reader]] implementation for transformers and estimators that contain basic
+ * Default [[MLReader]] implementation for transformers and estimators that contain basic
  * (json4s-serializable) params and no data. This will not handle more complex params or types with
  * data (e.g., models with coefficients).
  * @tparam T ML instance type
  * TODO: Consider adding check for correct class name.
  */
-private[ml] class DefaultParamsReader[T] extends Reader[T] {
+private[ml] class DefaultParamsReader[T] extends MLReader[T] {
 
   override def load(path: String): T = {
     val metadata = DefaultParamsReader.loadMetadata(path, sc)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
index 7f5c3895acb0..12aba6bc6dbe 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
@@ -179,8 +179,8 @@ class PipelineSuite extends SparkFunSuite with MLlibTestSparkContext with Defaul
 }
 
 
-/** Used to test [[Pipeline]] with [[Writable]] stages */
-class WritableStage(override val uid: String) extends Transformer with Writable {
+/** Used to test [[Pipeline]] with [[MLWritable]] stages */
+class WritableStage(override val uid: String) extends Transformer with MLWritable {
 
   final val intParam: IntParam = new IntParam(this, "intParam", "doc")
 
@@ -192,21 +192,21 @@ class WritableStage(override val uid: String) extends Transformer with Writable
 
   override def copy(extra: ParamMap): WritableStage = defaultCopy(extra)
 
-  override def write: Writer = new DefaultParamsWriter(this)
+  override def write: MLWriter = new DefaultParamsWriter(this)
 
   override def transform(dataset: DataFrame): DataFrame = dataset
 
   override def transformSchema(schema: StructType): StructType = schema
 }
 
-object WritableStage extends Readable[WritableStage] {
+object WritableStage extends MLReadable[WritableStage] {
 
-  override def read: Reader[WritableStage] = new DefaultParamsReader[WritableStage]
+  override def read: MLReader[WritableStage] = new DefaultParamsReader[WritableStage]
 
-  override def load(path: String): WritableStage = read.load(path)
+  override def load(path: String): WritableStage = super.load(path)
 }
 
-/** Used to test [[Pipeline]] with non-[[Writable]] stages */
+/** Used to test [[Pipeline]] with non-[[MLWritable]] stages */
 class UnWritableStage(override val uid: String) extends Transformer {
 
   final val intParam: IntParam = new IntParam(this, "intParam", "doc")
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
index dd1e8acce941..84d06b43d622 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/DefaultReadWriteTest.scala
@@ -38,7 +38,7 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
    * @tparam T ML instance type
    * @return  Instance loaded from file
    */
-  def testDefaultReadWrite[T <: Params with Writable](
+  def testDefaultReadWrite[T <: Params with MLWritable](
       instance: T,
       testParams: Boolean = true): T = {
     val uid = instance.uid
@@ -52,7 +52,7 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
       instance.save(path)
     }
     instance.write.overwrite().save(path)
-    val loader = instance.getClass.getMethod("read").invoke(null).asInstanceOf[Reader[T]]
+    val loader = instance.getClass.getMethod("read").invoke(null).asInstanceOf[MLReader[T]]
     val newInstance = loader.load(path)
 
     assert(newInstance.uid === instance.uid)
@@ -92,7 +92,8 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
    * @tparam E  Type of [[Estimator]]
    * @tparam M  Type of [[Model]] produced by estimator
    */
-  def testEstimatorAndModelReadWrite[E <: Estimator[M] with Writable, M <: Model[M] with Writable](
+  def testEstimatorAndModelReadWrite[
+    E <: Estimator[M] with MLWritable, M <: Model[M] with MLWritable](
       estimator: E,
       dataset: DataFrame,
       testParams: Map[String, Any],
@@ -119,7 +120,7 @@ trait DefaultReadWriteTest extends TempDirectory { self: Suite =>
   }
 }
 
-class MyParams(override val uid: String) extends Params with Writable {
+class MyParams(override val uid: String) extends Params with MLWritable {
 
   final val intParamWithDefault: IntParam = new IntParam(this, "intParamWithDefault", "doc")
   final val intParam: IntParam = new IntParam(this, "intParam", "doc")
@@ -145,14 +146,14 @@ class MyParams(override val uid: String) extends Params with Writable {
 
   override def copy(extra: ParamMap): Params = defaultCopy(extra)
 
-  override def write: Writer = new DefaultParamsWriter(this)
+  override def write: MLWriter = new DefaultParamsWriter(this)
 }
 
-object MyParams extends Readable[MyParams] {
+object MyParams extends MLReadable[MyParams] {
 
-  override def read: Reader[MyParams] = new DefaultParamsReader[MyParams]
+  override def read: MLReader[MyParams] = new DefaultParamsReader[MyParams]
 
-  override def load(path: String): MyParams = read.load(path)
+  override def load(path: String): MyParams = super.load(path)
 }
 
 class DefaultReadWriteSuite extends SparkFunSuite with MLlibTestSparkContext

From e61367b9f9bfc8e123369d55d7ca5925568b98a7 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 18 Nov 2015 18:34:36 -0800
Subject: [PATCH 789/896] [SPARK-11833][SQL] Add Java tests for Kryo/Java
 Dataset encoders

Also added some nicer error messages for incompatible types (private types and primitive types) for Kryo/Java encoder.

Author: Reynold Xin <rxin@databricks.com>

Closes #9823 from rxin/SPARK-11833.
---
 .../scala/org/apache/spark/sql/Encoder.scala  | 69 +++++++++++------
 .../encoders/EncoderErrorMessageSuite.scala   | 40 ++++++++++
 .../catalyst/encoders/FlatEncoderSuite.scala  | 22 ++----
 .../apache/spark/sql/JavaDatasetSuite.java    | 75 ++++++++++++++++++-
 4 files changed, 166 insertions(+), 40 deletions(-)
 create mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 1ed5111440c8..d54f2854fb33 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.sql
 
+import java.lang.reflect.Modifier
+
 import scala.reflect.{ClassTag, classTag}
 
 import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor}
@@ -43,30 +45,28 @@ trait Encoder[T] extends Serializable {
  */
 object Encoders {
 
-  /** A way to construct encoders using generic serializers. */
-  private def genericSerializer[T: ClassTag](useKryo: Boolean): Encoder[T] = {
-    ExpressionEncoder[T](
-      schema = new StructType().add("value", BinaryType),
-      flat = true,
-      toRowExpressions = Seq(
-        EncodeUsingSerializer(
-          BoundReference(0, ObjectType(classOf[AnyRef]), nullable = true), kryo = useKryo)),
-      fromRowExpression =
-        DecodeUsingSerializer[T](
-          BoundReference(0, BinaryType, nullable = true), classTag[T], kryo = useKryo),
-      clsTag = classTag[T]
-    )
-  }
+  def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
+  def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
+  def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
+  def INT: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true)
+  def LONG: Encoder[java.lang.Long] = ExpressionEncoder(flat = true)
+  def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder(flat = true)
+  def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
+  def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
 
   /**
    * (Scala-specific) Creates an encoder that serializes objects of type T using Kryo.
    * This encoder maps T into a single byte array (binary) field.
+   *
+   * T must be publicly accessible.
    */
   def kryo[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = true)
 
   /**
    * Creates an encoder that serializes objects of type T using Kryo.
    * This encoder maps T into a single byte array (binary) field.
+   *
+   * T must be publicly accessible.
    */
   def kryo[T](clazz: Class[T]): Encoder[T] = kryo(ClassTag[T](clazz))
 
@@ -75,6 +75,8 @@ object Encoders {
    * serialization. This encoder maps T into a single byte array (binary) field.
    *
    * Note that this is extremely inefficient and should only be used as the last resort.
+   *
+   * T must be publicly accessible.
    */
   def javaSerialization[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = false)
 
@@ -83,17 +85,40 @@ object Encoders {
    * This encoder maps T into a single byte array (binary) field.
    *
    * Note that this is extremely inefficient and should only be used as the last resort.
+   *
+   * T must be publicly accessible.
    */
   def javaSerialization[T](clazz: Class[T]): Encoder[T] = javaSerialization(ClassTag[T](clazz))
 
-  def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
-  def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
-  def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
-  def INT: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true)
-  def LONG: Encoder[java.lang.Long] = ExpressionEncoder(flat = true)
-  def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder(flat = true)
-  def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
-  def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
+  /** Throws an exception if T is not a public class. */
+  private def validatePublicClass[T: ClassTag](): Unit = {
+    if (!Modifier.isPublic(classTag[T].runtimeClass.getModifiers)) {
+      throw new UnsupportedOperationException(
+        s"${classTag[T].runtimeClass.getName} is not a public class. " +
+          "Only public classes are supported.")
+    }
+  }
+
+  /** A way to construct encoders using generic serializers. */
+  private def genericSerializer[T: ClassTag](useKryo: Boolean): Encoder[T] = {
+    if (classTag[T].runtimeClass.isPrimitive) {
+      throw new UnsupportedOperationException("Primitive types are not supported.")
+    }
+
+    validatePublicClass[T]()
+
+    ExpressionEncoder[T](
+      schema = new StructType().add("value", BinaryType),
+      flat = true,
+      toRowExpressions = Seq(
+        EncodeUsingSerializer(
+          BoundReference(0, ObjectType(classOf[AnyRef]), nullable = true), kryo = useKryo)),
+      fromRowExpression =
+        DecodeUsingSerializer[T](
+          BoundReference(0, BinaryType, nullable = true), classTag[T], kryo = useKryo),
+      clsTag = classTag[T]
+    )
+  }
 
   def tuple[T1, T2](
       e1: Encoder[T1],
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala
new file mode 100644
index 000000000000..0b2a10bb04c1
--- /dev/null
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.catalyst.encoders
+
+import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.Encoders
+
+
+class EncoderErrorMessageSuite extends SparkFunSuite {
+
+  // Note: we also test error messages for encoders for private classes in JavaDatasetSuite.
+  // That is done in Java because Scala cannot create truly private classes.
+
+  test("primitive types in encoders using Kryo serialization") {
+    intercept[UnsupportedOperationException] { Encoders.kryo[Int] }
+    intercept[UnsupportedOperationException] { Encoders.kryo[Long] }
+    intercept[UnsupportedOperationException] { Encoders.kryo[Char] }
+  }
+
+  test("primitive types in encoders using Java serialization") {
+    intercept[UnsupportedOperationException] { Encoders.javaSerialization[Int] }
+    intercept[UnsupportedOperationException] { Encoders.javaSerialization[Long] }
+    intercept[UnsupportedOperationException] { Encoders.javaSerialization[Char] }
+  }
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
index 6e0322fb6e01..07523d49f426 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
@@ -74,24 +74,14 @@ class FlatEncoderSuite extends ExpressionEncoderSuite {
     FlatEncoder[Map[Int, Map[String, Int]]], "map of map")
 
   // Kryo encoders
-  encodeDecodeTest(
-    "hello",
-    encoderFor(Encoders.kryo[String]),
-    "kryo string")
-  encodeDecodeTest(
-    new KryoSerializable(15),
-    encoderFor(Encoders.kryo[KryoSerializable]),
-    "kryo object serialization")
+  encodeDecodeTest("hello", encoderFor(Encoders.kryo[String]), "kryo string")
+  encodeDecodeTest(new KryoSerializable(15),
+    encoderFor(Encoders.kryo[KryoSerializable]), "kryo object")
 
   // Java encoders
-  encodeDecodeTest(
-    "hello",
-    encoderFor(Encoders.javaSerialization[String]),
-    "java string")
-  encodeDecodeTest(
-    new JavaSerializable(15),
-    encoderFor(Encoders.javaSerialization[JavaSerializable]),
-    "java object serialization")
+  encodeDecodeTest("hello", encoderFor(Encoders.javaSerialization[String]), "java string")
+  encodeDecodeTest(new JavaSerializable(15),
+    encoderFor(Encoders.javaSerialization[JavaSerializable]), "java object")
 }
 
 /** For testing Kryo serialization based encoder. */
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index d9b22506fbd3..ce40dd856f67 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -24,6 +24,7 @@
 import scala.Tuple3;
 import scala.Tuple4;
 import scala.Tuple5;
+
 import org.junit.*;
 
 import org.apache.spark.Accumulator;
@@ -410,8 +411,8 @@ public String call(Tuple2<String, Integer> value) throws Exception {
       .as(Encoders.tuple(Encoders.STRING(), Encoders.INT(), Encoders.LONG(), Encoders.LONG()));
     Assert.assertEquals(
       Arrays.asList(
-        new Tuple4<String, Integer, Long, Long>("a", 3, 3L, 2L),
-        new Tuple4<String, Integer, Long, Long>("b", 3, 3L, 1L)),
+        new Tuple4<>("a", 3, 3L, 2L),
+        new Tuple4<>("b", 3, 3L, 1L)),
       agged2.collectAsList());
   }
 
@@ -437,4 +438,74 @@ public Integer finish(Integer reduction) {
       return reduction;
     }
   }
+
+  public static class KryoSerializable {
+    String value;
+
+    KryoSerializable(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      return this.value.equals(((KryoSerializable) other).value);
+    }
+
+    @Override
+    public int hashCode() {
+      return this.value.hashCode();
+    }
+  }
+
+  public static class JavaSerializable implements Serializable {
+    String value;
+
+    JavaSerializable(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+      return this.value.equals(((JavaSerializable) other).value);
+    }
+
+    @Override
+    public int hashCode() {
+      return this.value.hashCode();
+    }
+  }
+
+  @Test
+  public void testKryoEncoder() {
+    Encoder<KryoSerializable> encoder = Encoders.kryo(KryoSerializable.class);
+    List<KryoSerializable> data = Arrays.asList(
+      new KryoSerializable("hello"), new KryoSerializable("world"));
+    Dataset<KryoSerializable> ds = context.createDataset(data, encoder);
+    Assert.assertEquals(data, ds.collectAsList());
+  }
+
+  @Test
+  public void testJavaEncoder() {
+    Encoder<JavaSerializable> encoder = Encoders.javaSerialization(JavaSerializable.class);
+    List<JavaSerializable> data = Arrays.asList(
+      new JavaSerializable("hello"), new JavaSerializable("world"));
+    Dataset<JavaSerializable> ds = context.createDataset(data, encoder);
+    Assert.assertEquals(data, ds.collectAsList());
+  }
+
+  /**
+   * For testing error messages when creating an encoder on a private class. This is done
+   * here since we cannot create truly private classes in Scala.
+   */
+  private static class PrivateClassTest { }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void testJavaEncoderErrorMessageForPrivateClass() {
+    Encoders.javaSerialization(PrivateClassTest.class);
+  }
+
+  @Test(expected = UnsupportedOperationException.class)
+  public void testKryoEncoderErrorMessageForPrivateClass() {
+    Encoders.kryo(PrivateClassTest.class);
+  }
 }

From 6d0848b53bbe6c5acdcf5c033cd396b1ae6e293d Mon Sep 17 00:00:00 2001
From: Nong Li <nong@databricks.com>
Date: Wed, 18 Nov 2015 18:38:45 -0800
Subject: [PATCH 790/896] [SPARK-11787][SQL] Improve Parquet scan performance
 when using flat schemas.

This patch adds an alternate to the Parquet RecordReader from the parquet-mr project
that is much faster for flat schemas. Instead of using the general converter mechanism
from parquet-mr, this directly uses the lower level APIs from parquet-columnar and a
customer RecordReader that directly assembles into UnsafeRows.

This is optionally disabled and only used for supported schemas.

Using the tpcds store sales table and doing a sum of increasingly more columns, the results
are:

For 1 Column:
  Before: 11.3M rows/second
  After: 18.2M rows/second

For 2 Columns:
  Before: 7.2M rows/second
  After: 11.2M rows/second

For 5 Columns:
  Before: 2.9M rows/second
  After: 4.5M rows/second

Author: Nong Li <nong@databricks.com>

Closes #9774 from nongli/parquet.
---
 .../apache/spark/rdd/SqlNewHadoopRDD.scala    |  41 +-
 .../sql/catalyst/expressions/UnsafeRow.java   |   9 +
 .../expressions/codegen/BufferHolder.java     |  32 +-
 .../expressions/codegen/UnsafeRowWriter.java  |  20 +-
 .../SpecificParquetRecordReaderBase.java      | 240 +++++++
 .../parquet/UnsafeRowParquetRecordReader.java | 593 ++++++++++++++++++
 .../parquet/CatalystRowConverter.scala        |  48 +-
 .../parquet/ParquetFilterSuite.scala          |   4 +-
 8 files changed, 944 insertions(+), 43 deletions(-)
 create mode 100644 sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java
 create mode 100644 sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java

diff --git a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
index 264dae7f3908..4d176332b69c 100644
--- a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
@@ -20,8 +20,6 @@ package org.apache.spark.rdd
 import java.text.SimpleDateFormat
 import java.util.Date
 
-import scala.reflect.ClassTag
-
 import org.apache.hadoop.conf.{Configurable, Configuration}
 import org.apache.hadoop.io.Writable
 import org.apache.hadoop.mapreduce._
@@ -30,10 +28,12 @@ import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.executor.DataReadMethod
 import org.apache.spark.mapreduce.SparkHadoopMapReduceUtil
+import org.apache.spark.storage.StorageLevel
 import org.apache.spark.unsafe.types.UTF8String
+import org.apache.spark.util.{Utils, SerializableConfiguration, ShutdownHookManager}
 import org.apache.spark.{Partition => SparkPartition, _}
-import org.apache.spark.storage.StorageLevel
-import org.apache.spark.util.{SerializableConfiguration, ShutdownHookManager, Utils}
+
+import scala.reflect.ClassTag
 
 
 private[spark] class SqlNewHadoopPartition(
@@ -96,6 +96,11 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
 
   @transient protected val jobId = new JobID(jobTrackerId, id)
 
+  // If true, enable using the custom RecordReader for parquet. This only works for
+  // a subset of the types (no complex types).
+  protected val enableUnsafeRowParquetReader: Boolean =
+      sc.conf.getBoolean("spark.parquet.enableUnsafeRowRecordReader", true)
+
   override def getPartitions: Array[SparkPartition] = {
     val conf = getConf(isDriverSide = true)
     val inputFormat = inputFormatClass.newInstance
@@ -150,9 +155,31 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
           configurable.setConf(conf)
         case _ =>
       }
-      private[this] var reader = format.createRecordReader(
-        split.serializableHadoopSplit.value, hadoopAttemptContext)
-      reader.initialize(split.serializableHadoopSplit.value, hadoopAttemptContext)
+      private[this] var reader: RecordReader[Void, V] = null
+
+      /**
+        * If the format is ParquetInputFormat, try to create the optimized RecordReader. If this
+        * fails (for example, unsupported schema), try with the normal reader.
+        * TODO: plumb this through a different way?
+        */
+      if (enableUnsafeRowParquetReader &&
+          format.getClass.getName == "org.apache.parquet.hadoop.ParquetInputFormat") {
+        // TODO: move this class to sql.execution and remove this.
+        reader = Utils.classForName(
+          "org.apache.spark.sql.execution.datasources.parquet.UnsafeRowParquetRecordReader")
+          .newInstance().asInstanceOf[RecordReader[Void, V]]
+        try {
+          reader.initialize(split.serializableHadoopSplit.value, hadoopAttemptContext)
+        } catch {
+          case e: Exception => reader = null
+        }
+      }
+
+      if (reader == null) {
+        reader = format.createRecordReader(
+          split.serializableHadoopSplit.value, hadoopAttemptContext)
+        reader.initialize(split.serializableHadoopSplit.value, hadoopAttemptContext)
+      }
 
       // Register an on-task-completion callback to close the input stream.
       context.addTaskCompletionListener(context => close())
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 5ba14ebdb62a..33769363a0ed 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -178,6 +178,15 @@ public void pointTo(byte[] buf, int numFields, int sizeInBytes) {
     pointTo(buf, Platform.BYTE_ARRAY_OFFSET, numFields, sizeInBytes);
   }
 
+  /**
+   * Updates this UnsafeRow preserving the number of fields.
+   * @param buf byte array to point to
+   * @param sizeInBytes the number of bytes valid in the byte array
+   */
+  public void pointTo(byte[] buf, int sizeInBytes) {
+    pointTo(buf, numFields, sizeInBytes);
+  }
+
   @Override
   public void setNullAt(int i) {
     assertIndexIsValid(i);
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
index 9c9468678065..d26b1b187c27 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/BufferHolder.java
@@ -17,19 +17,28 @@
 
 package org.apache.spark.sql.catalyst.expressions.codegen;
 
+import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
 import org.apache.spark.unsafe.Platform;
 
 /**
- * A helper class to manage the row buffer used in `GenerateUnsafeProjection`.
- *
- * Note that it is only used in `GenerateUnsafeProjection`, so it's safe to mark member variables
- * public for ease of use.
+ * A helper class to manage the row buffer when construct unsafe rows.
  */
 public class BufferHolder {
-  public byte[] buffer = new byte[64];
+  public byte[] buffer;
   public int cursor = Platform.BYTE_ARRAY_OFFSET;
 
-  public void grow(int neededSize) {
+  public BufferHolder() {
+    this(64);
+  }
+
+  public BufferHolder(int size) {
+    buffer = new byte[size];
+  }
+
+  /**
+   * Grows the buffer to at least neededSize. If row is non-null, points the row to the buffer.
+   */
+  public void grow(int neededSize, UnsafeRow row) {
     final int length = totalSize() + neededSize;
     if (buffer.length < length) {
       // This will not happen frequently, because the buffer is re-used.
@@ -41,12 +50,23 @@ public void grow(int neededSize) {
         Platform.BYTE_ARRAY_OFFSET,
         totalSize());
       buffer = tmp;
+      if (row != null) {
+        row.pointTo(buffer, length * 2);
+      }
     }
   }
 
+  public void grow(int neededSize) {
+    grow(neededSize, null);
+  }
+
   public void reset() {
     cursor = Platform.BYTE_ARRAY_OFFSET;
   }
+  public void resetTo(int offset) {
+    assert(offset <= buffer.length);
+    cursor = Platform.BYTE_ARRAY_OFFSET + offset;
+  }
 
   public int totalSize() {
     return cursor - Platform.BYTE_ARRAY_OFFSET;
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
index 048b7749d8fb..e227c0dec974 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/codegen/UnsafeRowWriter.java
@@ -35,6 +35,7 @@ public class UnsafeRowWriter {
   // The offset of the global buffer where we start to write this row.
   private int startingOffset;
   private int nullBitsSize;
+  private UnsafeRow row;
 
   public void initialize(BufferHolder holder, int numFields) {
     this.holder = holder;
@@ -43,7 +44,7 @@ public void initialize(BufferHolder holder, int numFields) {
 
     // grow the global buffer to make sure it has enough space to write fixed-length data.
     final int fixedSize = nullBitsSize + 8 * numFields;
-    holder.grow(fixedSize);
+    holder.grow(fixedSize, row);
     holder.cursor += fixedSize;
 
     // zero-out the null bits region
@@ -52,12 +53,19 @@ public void initialize(BufferHolder holder, int numFields) {
     }
   }
 
+  public void initialize(UnsafeRow row, BufferHolder holder, int numFields) {
+    initialize(holder, numFields);
+    this.row = row;
+  }
+
   private void zeroOutPaddingBytes(int numBytes) {
     if ((numBytes & 0x07) > 0) {
       Platform.putLong(holder.buffer, holder.cursor + ((numBytes >> 3) << 3), 0L);
     }
   }
 
+  public BufferHolder holder() { return holder; }
+
   public boolean isNullAt(int ordinal) {
     return BitSetMethods.isSet(holder.buffer, startingOffset, ordinal);
   }
@@ -90,7 +98,7 @@ public void alignToWords(int numBytes) {
 
     if (remainder > 0) {
       final int paddingBytes = 8 - remainder;
-      holder.grow(paddingBytes);
+      holder.grow(paddingBytes, row);
 
       for (int i = 0; i < paddingBytes; i++) {
         Platform.putByte(holder.buffer, holder.cursor, (byte) 0);
@@ -153,7 +161,7 @@ public void write(int ordinal, Decimal input, int precision, int scale) {
       }
     } else {
       // grow the global buffer before writing data.
-      holder.grow(16);
+      holder.grow(16, row);
 
       // zero-out the bytes
       Platform.putLong(holder.buffer, holder.cursor, 0L);
@@ -185,7 +193,7 @@ public void write(int ordinal, UTF8String input) {
     final int roundedSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
 
     // grow the global buffer before writing data.
-    holder.grow(roundedSize);
+    holder.grow(roundedSize, row);
 
     zeroOutPaddingBytes(numBytes);
 
@@ -206,7 +214,7 @@ public void write(int ordinal, byte[] input, int offset, int numBytes) {
     final int roundedSize = ByteArrayMethods.roundNumberOfBytesToNearestWord(numBytes);
 
     // grow the global buffer before writing data.
-    holder.grow(roundedSize);
+    holder.grow(roundedSize, row);
 
     zeroOutPaddingBytes(numBytes);
 
@@ -222,7 +230,7 @@ public void write(int ordinal, byte[] input, int offset, int numBytes) {
 
   public void write(int ordinal, CalendarInterval input) {
     // grow the global buffer before writing data.
-    holder.grow(16);
+    holder.grow(16, row);
 
     // Write the months and microseconds fields of Interval to the variable length portion.
     Platform.putLong(holder.buffer, holder.cursor, input.months);
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java
new file mode 100644
index 000000000000..2ed30c1f5a8d
--- /dev/null
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/SpecificParquetRecordReaderBase.java
@@ -0,0 +1,240 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package org.apache.spark.sql.execution.datasources.parquet;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static org.apache.parquet.filter2.compat.RowGroupFilter.filterRowGroups;
+import static org.apache.parquet.format.converter.ParquetMetadataConverter.NO_FILTER;
+import static org.apache.parquet.format.converter.ParquetMetadataConverter.range;
+import static org.apache.parquet.hadoop.ParquetFileReader.readFooter;
+import static org.apache.parquet.hadoop.ParquetInputFormat.getFilter;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.mapreduce.InputSplit;
+import org.apache.hadoop.mapreduce.RecordReader;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+import org.apache.parquet.bytes.BytesInput;
+import org.apache.parquet.bytes.BytesUtils;
+import org.apache.parquet.column.ColumnDescriptor;
+import org.apache.parquet.column.values.ValuesReader;
+import org.apache.parquet.column.values.rle.RunLengthBitPackingHybridDecoder;
+import org.apache.parquet.filter2.compat.FilterCompat;
+import org.apache.parquet.hadoop.BadConfigurationException;
+import org.apache.parquet.hadoop.ParquetFileReader;
+import org.apache.parquet.hadoop.ParquetInputFormat;
+import org.apache.parquet.hadoop.ParquetInputSplit;
+import org.apache.parquet.hadoop.api.InitContext;
+import org.apache.parquet.hadoop.api.ReadSupport;
+import org.apache.parquet.hadoop.metadata.BlockMetaData;
+import org.apache.parquet.hadoop.metadata.ParquetMetadata;
+import org.apache.parquet.hadoop.util.ConfigurationUtil;
+import org.apache.parquet.schema.MessageType;
+
+/**
+ * Base class for custom RecordReaaders for Parquet that directly materialize to `T`.
+ * This class handles computing row groups, filtering on them, setting up the column readers,
+ * etc.
+ * This is heavily based on parquet-mr's RecordReader.
+ * TODO: move this to the parquet-mr project. There are performance benefits of doing it
+ * this way, albeit at a higher cost to implement. This base class is reusable.
+ */
+public abstract class SpecificParquetRecordReaderBase<T> extends RecordReader<Void, T> {
+  protected Path file;
+  protected MessageType fileSchema;
+  protected MessageType requestedSchema;
+  protected ReadSupport<T> readSupport;
+
+  /**
+   * The total number of rows this RecordReader will eventually read. The sum of the
+   * rows of all the row groups.
+   */
+  protected long totalRowCount;
+
+  protected ParquetFileReader reader;
+
+  public void initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext)
+      throws IOException, InterruptedException {
+    Configuration configuration = taskAttemptContext.getConfiguration();
+    ParquetInputSplit split = (ParquetInputSplit)inputSplit;
+    this.file = split.getPath();
+    long[] rowGroupOffsets = split.getRowGroupOffsets();
+
+    ParquetMetadata footer;
+    List<BlockMetaData> blocks;
+
+    // if task.side.metadata is set, rowGroupOffsets is null
+    if (rowGroupOffsets == null) {
+      // then we need to apply the predicate push down filter
+      footer = readFooter(configuration, file, range(split.getStart(), split.getEnd()));
+      MessageType fileSchema = footer.getFileMetaData().getSchema();
+      FilterCompat.Filter filter = getFilter(configuration);
+      blocks = filterRowGroups(filter, footer.getBlocks(), fileSchema);
+    } else {
+      // otherwise we find the row groups that were selected on the client
+      footer = readFooter(configuration, file, NO_FILTER);
+      Set<Long> offsets = new HashSet<>();
+      for (long offset : rowGroupOffsets) {
+        offsets.add(offset);
+      }
+      blocks = new ArrayList<>();
+      for (BlockMetaData block : footer.getBlocks()) {
+        if (offsets.contains(block.getStartingPos())) {
+          blocks.add(block);
+        }
+      }
+      // verify we found them all
+      if (blocks.size() != rowGroupOffsets.length) {
+        long[] foundRowGroupOffsets = new long[footer.getBlocks().size()];
+        for (int i = 0; i < foundRowGroupOffsets.length; i++) {
+          foundRowGroupOffsets[i] = footer.getBlocks().get(i).getStartingPos();
+        }
+        // this should never happen.
+        // provide a good error message in case there's a bug
+        throw new IllegalStateException(
+            "All the offsets listed in the split should be found in the file."
+                + " expected: " + Arrays.toString(rowGroupOffsets)
+                + " found: " + blocks
+                + " out of: " + Arrays.toString(foundRowGroupOffsets)
+                + " in range " + split.getStart() + ", " + split.getEnd());
+      }
+    }
+    MessageType fileSchema = footer.getFileMetaData().getSchema();
+    Map<String, String> fileMetadata = footer.getFileMetaData().getKeyValueMetaData();
+    this.readSupport = getReadSupportInstance(
+        (Class<? extends ReadSupport<T>>) getReadSupportClass(configuration));
+    ReadSupport.ReadContext readContext = readSupport.init(new InitContext(
+        taskAttemptContext.getConfiguration(), toSetMultiMap(fileMetadata), fileSchema));
+    this.requestedSchema = readContext.getRequestedSchema();
+    this.fileSchema = fileSchema;
+    this.reader = new ParquetFileReader(configuration, file, blocks, requestedSchema.getColumns());
+    for (BlockMetaData block : blocks) {
+      this.totalRowCount += block.getRowCount();
+    }
+  }
+
+  @Override
+  public Void getCurrentKey() throws IOException, InterruptedException {
+    return null;
+  }
+
+  @Override
+  public void close() throws IOException {
+    if (reader != null) {
+      reader.close();
+      reader = null;
+    }
+  }
+
+  /**
+   * Utility classes to abstract over different way to read ints with different encodings.
+   * TODO: remove this layer of abstraction?
+   */
+  abstract static class IntIterator {
+    abstract int nextInt() throws IOException;
+  }
+
+  protected static final class ValuesReaderIntIterator extends IntIterator {
+    ValuesReader delegate;
+
+    public ValuesReaderIntIterator(ValuesReader delegate) {
+      this.delegate = delegate;
+    }
+
+    @Override
+    int nextInt() throws IOException {
+      return delegate.readInteger();
+    }
+  }
+
+  protected static final class RLEIntIterator extends IntIterator {
+    RunLengthBitPackingHybridDecoder delegate;
+
+    public RLEIntIterator(RunLengthBitPackingHybridDecoder delegate) {
+      this.delegate = delegate;
+    }
+
+    @Override
+    int nextInt() throws IOException {
+      return delegate.readInt();
+    }
+  }
+
+  protected static final class NullIntIterator extends IntIterator {
+    @Override
+    int nextInt() throws IOException { return 0; }
+  }
+
+  /**
+   * Creates a reader for definition and repetition levels, returning an optimized one if
+   * the levels are not needed.
+   */
+  static protected IntIterator createRLEIterator(int maxLevel, BytesInput bytes,
+                                              ColumnDescriptor descriptor) throws IOException {
+    try {
+      if (maxLevel == 0) return new NullIntIterator();
+      return new RLEIntIterator(
+          new RunLengthBitPackingHybridDecoder(
+              BytesUtils.getWidthFromMaxInt(maxLevel),
+              new ByteArrayInputStream(bytes.toByteArray())));
+    } catch (IOException e) {
+      throw new IOException("could not read levels in page for col " + descriptor, e);
+    }
+  }
+
+  private static <K, V> Map<K, Set<V>> toSetMultiMap(Map<K, V> map) {
+    Map<K, Set<V>> setMultiMap = new HashMap<>();
+    for (Map.Entry<K, V> entry : map.entrySet()) {
+      Set<V> set = new HashSet<>();
+      set.add(entry.getValue());
+      setMultiMap.put(entry.getKey(), Collections.unmodifiableSet(set));
+    }
+    return Collections.unmodifiableMap(setMultiMap);
+  }
+
+  private static Class<?> getReadSupportClass(Configuration configuration) {
+    return ConfigurationUtil.getClassFromConfig(configuration,
+        ParquetInputFormat.READ_SUPPORT_CLASS, ReadSupport.class);
+  }
+
+  /**
+   * @param readSupportClass to instantiate
+   * @return the configured read support
+   */
+  private static <T> ReadSupport<T> getReadSupportInstance(
+      Class<? extends ReadSupport<T>> readSupportClass){
+    try {
+      return readSupportClass.newInstance();
+    } catch (InstantiationException e) {
+      throw new BadConfigurationException("could not instantiate read support class", e);
+    } catch (IllegalAccessException e) {
+      throw new BadConfigurationException("could not instantiate read support class", e);
+    }
+  }
+}
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java
new file mode 100644
index 000000000000..8a92e489ccb7
--- /dev/null
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java
@@ -0,0 +1,593 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.sql.execution.datasources.parquet;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.List;
+
+import org.apache.spark.sql.catalyst.expressions.UnsafeRow;
+import org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder;
+import org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.unsafe.Platform;
+import org.apache.spark.unsafe.types.UTF8String;
+
+import static org.apache.parquet.column.ValuesType.DEFINITION_LEVEL;
+import static org.apache.parquet.column.ValuesType.REPETITION_LEVEL;
+import static org.apache.parquet.column.ValuesType.VALUES;
+
+import org.apache.hadoop.mapreduce.InputSplit;
+import org.apache.hadoop.mapreduce.TaskAttemptContext;
+import org.apache.parquet.Preconditions;
+import org.apache.parquet.column.ColumnDescriptor;
+import org.apache.parquet.column.Dictionary;
+import org.apache.parquet.column.Encoding;
+import org.apache.parquet.column.page.DataPage;
+import org.apache.parquet.column.page.DataPageV1;
+import org.apache.parquet.column.page.DataPageV2;
+import org.apache.parquet.column.page.DictionaryPage;
+import org.apache.parquet.column.page.PageReadStore;
+import org.apache.parquet.column.page.PageReader;
+import org.apache.parquet.column.values.ValuesReader;
+import org.apache.parquet.io.api.Binary;
+import org.apache.parquet.schema.OriginalType;
+import org.apache.parquet.schema.PrimitiveType;
+import org.apache.parquet.schema.Type;
+
+/**
+ * A specialized RecordReader that reads into UnsafeRows directly using the Parquet column APIs.
+ *
+ * This is somewhat based on parquet-mr's ColumnReader.
+ *
+ * TODO: handle complex types, decimal requiring more than 8 bytes, INT96. Schema mismatch.
+ * All of these can be handled efficiently and easily with codegen.
+ */
+public class UnsafeRowParquetRecordReader extends SpecificParquetRecordReaderBase<UnsafeRow> {
+  /**
+   * Batch of unsafe rows that we assemble and the current index we've returned. Everytime this
+   * batch is used up (batchIdx == numBatched), we populated the batch.
+   */
+  private UnsafeRow[] rows = new UnsafeRow[64];
+  private int batchIdx = 0;
+  private int numBatched = 0;
+
+  /**
+   * Used to write variable length columns. Same length as `rows`.
+   */
+  private UnsafeRowWriter[] rowWriters = null;
+  /**
+   * True if the row contains variable length fields.
+   */
+  private boolean containsVarLenFields;
+
+  /**
+   * The number of bytes in the fixed length portion of the row.
+   */
+  private int fixedSizeBytes;
+
+  /**
+   * For each request column, the reader to read this column.
+   * columnsReaders[i] populated the UnsafeRow's attribute at i.
+   */
+  private ColumnReader[] columnReaders;
+
+  /**
+   * The number of rows that have been returned.
+   */
+  private long rowsReturned;
+
+  /**
+   * The number of rows that have been reading, including the current in flight row group.
+   */
+  private long totalCountLoadedSoFar = 0;
+
+  /**
+   * For each column, the annotated original type.
+   */
+  private OriginalType[] originalTypes;
+
+  /**
+   * The default size for varlen columns. The row grows as necessary to accommodate the
+   * largest column.
+   */
+  private static final int DEFAULT_VAR_LEN_SIZE = 32;
+
+  /**
+   * Implementation of RecordReader API.
+   */
+  @Override
+  public void initialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext)
+      throws IOException, InterruptedException {
+    super.initialize(inputSplit, taskAttemptContext);
+
+    /**
+     * Check that the requested schema is supported.
+     */
+    if (requestedSchema.getFieldCount() == 0) {
+      // TODO: what does this mean?
+      throw new IOException("Empty request schema not supported.");
+    }
+    int numVarLenFields = 0;
+    originalTypes = new OriginalType[requestedSchema.getFieldCount()];
+    for (int i = 0; i < requestedSchema.getFieldCount(); ++i) {
+      Type t = requestedSchema.getFields().get(i);
+      if (!t.isPrimitive() || t.isRepetition(Type.Repetition.REPEATED)) {
+        throw new IOException("Complex types not supported.");
+      }
+      PrimitiveType primitiveType = t.asPrimitiveType();
+
+      originalTypes[i] = t.getOriginalType();
+
+      // TODO: Be extremely cautious in what is supported. Expand this.
+      if (originalTypes[i] != null && originalTypes[i] != OriginalType.DECIMAL &&
+          originalTypes[i] != OriginalType.UTF8 && originalTypes[i] != OriginalType.DATE) {
+        throw new IOException("Unsupported type: " + t);
+      }
+      if (originalTypes[i] == OriginalType.DECIMAL &&
+          primitiveType.getDecimalMetadata().getPrecision() >
+              CatalystSchemaConverter.MAX_PRECISION_FOR_INT64()) {
+        throw new IOException("Decimal with high precision is not supported.");
+      }
+      if (primitiveType.getPrimitiveTypeName() == PrimitiveType.PrimitiveTypeName.INT96) {
+        throw new IOException("Int96 not supported.");
+      }
+      ColumnDescriptor fd = fileSchema.getColumnDescription(requestedSchema.getPaths().get(i));
+      if (!fd.equals(requestedSchema.getColumns().get(i))) {
+        throw new IOException("Schema evolution not supported.");
+      }
+
+      if (primitiveType.getPrimitiveTypeName() == PrimitiveType.PrimitiveTypeName.BINARY) {
+        ++numVarLenFields;
+      }
+    }
+
+    /**
+     * Initialize rows and rowWriters. These objects are reused across all rows in the relation.
+     */
+    int rowByteSize = UnsafeRow.calculateBitSetWidthInBytes(requestedSchema.getFieldCount());
+    rowByteSize += 8 * requestedSchema.getFieldCount();
+    fixedSizeBytes = rowByteSize;
+    rowByteSize += numVarLenFields * DEFAULT_VAR_LEN_SIZE;
+    containsVarLenFields = numVarLenFields > 0;
+    rowWriters = new UnsafeRowWriter[rows.length];
+
+    for (int i = 0; i < rows.length; ++i) {
+      rows[i] = new UnsafeRow();
+      rowWriters[i] = new UnsafeRowWriter();
+      BufferHolder holder = new BufferHolder(rowByteSize);
+      rowWriters[i].initialize(rows[i], holder, requestedSchema.getFieldCount());
+      rows[i].pointTo(holder.buffer, Platform.BYTE_ARRAY_OFFSET, requestedSchema.getFieldCount(),
+          holder.buffer.length);
+    }
+  }
+
+  @Override
+  public boolean nextKeyValue() throws IOException, InterruptedException {
+    if (batchIdx >= numBatched) {
+      if (!loadBatch()) return false;
+    }
+    ++batchIdx;
+    return true;
+  }
+
+  @Override
+  public UnsafeRow getCurrentValue() throws IOException, InterruptedException {
+    return rows[batchIdx - 1];
+  }
+
+  @Override
+  public float getProgress() throws IOException, InterruptedException {
+    return (float) rowsReturned / totalRowCount;
+  }
+
+  /**
+   * Decodes a batch of values into `rows`. This function is the hot path.
+   */
+  private boolean loadBatch() throws IOException {
+    // no more records left
+    if (rowsReturned >= totalRowCount) { return false; }
+    checkEndOfRowGroup();
+
+    int num = (int)Math.min(rows.length, totalCountLoadedSoFar - rowsReturned);
+    rowsReturned += num;
+
+    if (containsVarLenFields) {
+      for (int i = 0; i < rowWriters.length; ++i) {
+        rowWriters[i].holder().resetTo(fixedSizeBytes);
+      }
+    }
+
+    for (int i = 0; i < columnReaders.length; ++i) {
+      switch (columnReaders[i].descriptor.getType()) {
+        case BOOLEAN:
+          decodeBooleanBatch(i, num);
+          break;
+        case INT32:
+          if (originalTypes[i] == OriginalType.DECIMAL) {
+            decodeIntAsDecimalBatch(i, num);
+          } else {
+            decodeIntBatch(i, num);
+          }
+          break;
+        case INT64:
+          Preconditions.checkState(originalTypes[i] == null
+              || originalTypes[i] == OriginalType.DECIMAL,
+              "Unexpected original type: " + originalTypes[i]);
+          decodeLongBatch(i, num);
+          break;
+        case FLOAT:
+          decodeFloatBatch(i, num);
+          break;
+        case DOUBLE:
+          decodeDoubleBatch(i, num);
+          break;
+        case BINARY:
+          decodeBinaryBatch(i, num);
+          break;
+        case FIXED_LEN_BYTE_ARRAY:
+          Preconditions.checkState(originalTypes[i] == OriginalType.DECIMAL,
+              "Unexpected original type: " + originalTypes[i]);
+          decodeFixedLenArrayAsDecimalBatch(i, num);
+          break;
+        case INT96:
+          throw new IOException("Unsupported " + columnReaders[i].descriptor.getType());
+      }
+      numBatched = num;
+      batchIdx = 0;
+    }
+    return true;
+  }
+
+  private void decodeBooleanBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        rows[n].setBoolean(col, columnReaders[col].nextBoolean());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeIntBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        rows[n].setInt(col, columnReaders[col].nextInt());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeIntAsDecimalBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        // Since this is stored as an INT, it is always a compact decimal. Just set it as a long.
+        rows[n].setLong(col, columnReaders[col].nextInt());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeLongBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        rows[n].setLong(col, columnReaders[col].nextLong());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeFloatBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        rows[n].setFloat(col, columnReaders[col].nextFloat());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeDoubleBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        rows[n].setDouble(col, columnReaders[col].nextDouble());
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeBinaryBatch(int col, int num) throws IOException {
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        ByteBuffer bytes = columnReaders[col].nextBinary().toByteBuffer();
+        int len = bytes.limit() - bytes.position();
+        if (originalTypes[col] == OriginalType.UTF8) {
+          UTF8String str = UTF8String.fromBytes(bytes.array(), bytes.position(), len);
+          rowWriters[n].write(col, str);
+        } else {
+          rowWriters[n].write(col, bytes.array(), bytes.position(), len);
+        }
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  private void decodeFixedLenArrayAsDecimalBatch(int col, int num) throws IOException {
+    PrimitiveType type = requestedSchema.getFields().get(col).asPrimitiveType();
+    int precision = type.getDecimalMetadata().getPrecision();
+    int scale = type.getDecimalMetadata().getScale();
+    Preconditions.checkState(precision <= CatalystSchemaConverter.MAX_PRECISION_FOR_INT64(),
+        "Unsupported precision.");
+
+    for (int n = 0; n < num; ++n) {
+      if (columnReaders[col].next()) {
+        Binary v = columnReaders[col].nextBinary();
+        // Constructs a `Decimal` with an unscaled `Long` value if possible.
+        long unscaled = CatalystRowConverter.binaryToUnscaledLong(v);
+        rows[n].setDecimal(col, Decimal.apply(unscaled, precision, scale), precision);
+      } else {
+        rows[n].setNullAt(col);
+      }
+    }
+  }
+
+  /**
+   *
+   * Decoder to return values from a single column.
+   */
+  private static final class ColumnReader {
+    /**
+     * Total number of values read.
+     */
+    private long valuesRead;
+
+    /**
+     * value that indicates the end of the current page. That is,
+     * if valuesRead == endOfPageValueCount, we are at the end of the page.
+     */
+    private long endOfPageValueCount;
+
+    /**
+     * The dictionary, if this column has dictionary encoding.
+     */
+    private final Dictionary dictionary;
+
+    /**
+     * If true, the current page is dictionary encoded.
+     */
+    private boolean useDictionary;
+
+    /**
+     * Maximum definition level for this column.
+     */
+    private final int maxDefLevel;
+
+    /**
+     * Repetition/Definition/Value readers.
+     */
+    private IntIterator repetitionLevelColumn;
+    private IntIterator definitionLevelColumn;
+    private ValuesReader dataColumn;
+
+    /**
+     * Total number of values in this column (in this row group).
+     */
+    private final long totalValueCount;
+
+    /**
+     * Total values in the current page.
+     */
+    private int pageValueCount;
+
+    private final PageReader pageReader;
+    private final ColumnDescriptor descriptor;
+
+    public ColumnReader(ColumnDescriptor descriptor, PageReader pageReader)
+        throws IOException {
+      this.descriptor = descriptor;
+      this.pageReader = pageReader;
+      this.maxDefLevel = descriptor.getMaxDefinitionLevel();
+
+      DictionaryPage dictionaryPage = pageReader.readDictionaryPage();
+      if (dictionaryPage != null) {
+        try {
+          this.dictionary = dictionaryPage.getEncoding().initDictionary(descriptor, dictionaryPage);
+          this.useDictionary = true;
+        } catch (IOException e) {
+          throw new IOException("could not decode the dictionary for " + descriptor, e);
+        }
+      } else {
+        this.dictionary = null;
+        this.useDictionary = false;
+      }
+      this.totalValueCount = pageReader.getTotalValueCount();
+      if (totalValueCount == 0) {
+        throw new IOException("totalValueCount == 0");
+      }
+    }
+
+    /**
+     * TODO: Hoist the useDictionary branch to decode*Batch and make the batch page aligned.
+     */
+    public boolean nextBoolean() {
+      if (!useDictionary) {
+        return dataColumn.readBoolean();
+      } else {
+        return dictionary.decodeToBoolean(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    public int nextInt() {
+      if (!useDictionary) {
+        return dataColumn.readInteger();
+      } else {
+        return dictionary.decodeToInt(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    public long nextLong() {
+      if (!useDictionary) {
+        return dataColumn.readLong();
+      } else {
+        return dictionary.decodeToLong(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    public float nextFloat() {
+      if (!useDictionary) {
+        return dataColumn.readFloat();
+      } else {
+        return dictionary.decodeToFloat(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    public double nextDouble() {
+      if (!useDictionary) {
+        return dataColumn.readDouble();
+      } else {
+        return dictionary.decodeToDouble(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    public Binary nextBinary() {
+      if (!useDictionary) {
+        return dataColumn.readBytes();
+      } else {
+        return dictionary.decodeToBinary(dataColumn.readValueDictionaryId());
+      }
+    }
+
+    /**
+     * Advances to the next value. Returns true if the value is non-null.
+     */
+    private boolean next() throws IOException {
+      if (valuesRead >= endOfPageValueCount) {
+        if (valuesRead >= totalValueCount) {
+          // How do we get here? Throw end of stream exception?
+          return false;
+        }
+        readPage();
+      }
+      ++valuesRead;
+      // TODO: Don't read for flat schemas
+      //repetitionLevel = repetitionLevelColumn.nextInt();
+      return definitionLevelColumn.nextInt() == maxDefLevel;
+    }
+
+    private void readPage() throws IOException {
+      DataPage page = pageReader.readPage();
+      // TODO: Why is this a visitor?
+      page.accept(new DataPage.Visitor<Void>() {
+        @Override
+        public Void visit(DataPageV1 dataPageV1) {
+          try {
+            readPageV1(dataPageV1);
+            return null;
+          } catch (IOException e) {
+            throw new RuntimeException(e);
+          }
+        }
+
+        @Override
+        public Void visit(DataPageV2 dataPageV2) {
+          try {
+            readPageV2(dataPageV2);
+            return null;
+          } catch (IOException e) {
+            throw new RuntimeException(e);
+          }
+        }
+      });
+    }
+
+    private void initDataReader(Encoding dataEncoding, byte[] bytes, int offset, int valueCount)
+        throws IOException {
+      this.pageValueCount = valueCount;
+      this.endOfPageValueCount = valuesRead + pageValueCount;
+      if (dataEncoding.usesDictionary()) {
+        if (dictionary == null) {
+          throw new IOException(
+              "could not read page in col " + descriptor +
+                  " as the dictionary was missing for encoding " + dataEncoding);
+        }
+        this.dataColumn = dataEncoding.getDictionaryBasedValuesReader(
+            descriptor, VALUES, dictionary);
+        this.useDictionary = true;
+      } else {
+        this.dataColumn = dataEncoding.getValuesReader(descriptor, VALUES);
+        this.useDictionary = false;
+      }
+
+      try {
+        dataColumn.initFromPage(pageValueCount, bytes, offset);
+      } catch (IOException e) {
+        throw new IOException("could not read page in col " + descriptor, e);
+      }
+    }
+
+    private void readPageV1(DataPageV1 page) throws IOException {
+      ValuesReader rlReader = page.getRlEncoding().getValuesReader(descriptor, REPETITION_LEVEL);
+      ValuesReader dlReader = page.getDlEncoding().getValuesReader(descriptor, DEFINITION_LEVEL);
+      this.repetitionLevelColumn = new ValuesReaderIntIterator(rlReader);
+      this.definitionLevelColumn = new ValuesReaderIntIterator(dlReader);
+      try {
+        byte[] bytes = page.getBytes().toByteArray();
+        rlReader.initFromPage(pageValueCount, bytes, 0);
+        int next = rlReader.getNextOffset();
+        dlReader.initFromPage(pageValueCount, bytes, next);
+        next = dlReader.getNextOffset();
+        initDataReader(page.getValueEncoding(), bytes, next, page.getValueCount());
+      } catch (IOException e) {
+        throw new IOException("could not read page " + page + " in col " + descriptor, e);
+      }
+    }
+
+    private void readPageV2(DataPageV2 page) throws IOException {
+      this.repetitionLevelColumn = createRLEIterator(descriptor.getMaxRepetitionLevel(),
+          page.getRepetitionLevels(), descriptor);
+      this.definitionLevelColumn = createRLEIterator(descriptor.getMaxDefinitionLevel(),
+          page.getDefinitionLevels(), descriptor);
+      try {
+        initDataReader(page.getDataEncoding(), page.getData().toByteArray(), 0,
+            page.getValueCount());
+      } catch (IOException e) {
+        throw new IOException("could not read page " + page + " in col " + descriptor, e);
+      }
+    }
+  }
+
+  private void checkEndOfRowGroup() throws IOException {
+    if (rowsReturned != totalCountLoadedSoFar) return;
+    PageReadStore pages = reader.readNextRowGroup();
+    if (pages == null) {
+      throw new IOException("expecting more rows but reached last block. Read "
+          + rowsReturned + " out of " + totalRowCount);
+    }
+    List<ColumnDescriptor> columns = requestedSchema.getColumns();
+    columnReaders = new ColumnReader[columns.size()];
+    for (int i = 0; i < columns.size(); ++i) {
+      columnReaders[i] = new ColumnReader(columns.get(i), pages.getPageReader(columns.get(i)));
+    }
+    totalCountLoadedSoFar += pages.getRowCount();
+  }
+}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
index 1f653cd3d3cb..94298fae2d69 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/CatalystRowConverter.scala
@@ -370,35 +370,13 @@ private[parquet] class CatalystRowConverter(
     protected def decimalFromBinary(value: Binary): Decimal = {
       if (precision <= CatalystSchemaConverter.MAX_PRECISION_FOR_INT64) {
         // Constructs a `Decimal` with an unscaled `Long` value if possible.
-        val unscaled = binaryToUnscaledLong(value)
+        val unscaled = CatalystRowConverter.binaryToUnscaledLong(value)
         Decimal(unscaled, precision, scale)
       } else {
         // Otherwise, resorts to an unscaled `BigInteger` instead.
         Decimal(new BigDecimal(new BigInteger(value.getBytes), scale), precision, scale)
       }
     }
-
-    private def binaryToUnscaledLong(binary: Binary): Long = {
-      // The underlying `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here
-      // we are using `Binary.toByteBuffer.array()` to steal the underlying byte array without
-      // copying it.
-      val buffer = binary.toByteBuffer
-      val bytes = buffer.array()
-      val start = buffer.position()
-      val end = buffer.limit()
-
-      var unscaled = 0L
-      var i = start
-
-      while (i < end) {
-        unscaled = (unscaled << 8) | (bytes(i) & 0xff)
-        i += 1
-      }
-
-      val bits = 8 * (end - start)
-      unscaled = (unscaled << (64 - bits)) >> (64 - bits)
-      unscaled
-    }
   }
 
   private class CatalystIntDictionaryAwareDecimalConverter(
@@ -658,3 +636,27 @@ private[parquet] class CatalystRowConverter(
     override def start(): Unit = elementConverter.start()
   }
 }
+
+private[parquet] object CatalystRowConverter {
+  def binaryToUnscaledLong(binary: Binary): Long = {
+    // The underlying `ByteBuffer` implementation is guaranteed to be `HeapByteBuffer`, so here
+    // we are using `Binary.toByteBuffer.array()` to steal the underlying byte array without
+    // copying it.
+    val buffer = binary.toByteBuffer
+    val bytes = buffer.array()
+    val start = buffer.position()
+    val end = buffer.limit()
+
+    var unscaled = 0L
+    var i = start
+
+    while (i < end) {
+      unscaled = (unscaled << 8) | (bytes(i) & 0xff)
+      i += 1
+    }
+
+    val bits = 8 * (end - start)
+    unscaled = (unscaled << (64 - bits)) >> (64 - bits)
+    unscaled
+  }
+}
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index 458786f77af3..c8028a5ef552 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -337,7 +337,9 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
     }
   }
 
-  test("SPARK-11661 Still pushdown filters returned by unhandledFilters") {
+  // Renable when we can toggle custom ParquetRecordReader on/off. The custom reader does
+  // not do row by row filtering (and we probably don't want to push that).
+  ignore("SPARK-11661 Still pushdown filters returned by unhandledFilters") {
     import testImplicits._
     withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true") {
       withTempPath { dir =>

From 9c0654d36c6d171dd273850c2cc2f415cc2a5a6b Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Wed, 18 Nov 2015 18:41:40 -0800
Subject: [PATCH 791/896] Revert "[SPARK-11544][SQL] sqlContext doesn't use
 PathFilter"

This reverts commit 54db79702513e11335c33bcf3a03c59e965e6f16.
---
 .../apache/spark/sql/sources/interfaces.scala | 25 +++----------
 .../datasources/json/JsonSuite.scala          | 36 ++-----------------
 2 files changed, 7 insertions(+), 54 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index f9465157c936..b3d3bdf50df6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -21,8 +21,7 @@ import scala.collection.mutable
 import scala.util.Try
 
 import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.fs.{PathFilter, FileStatus, FileSystem, Path}
-import org.apache.hadoop.mapred.{JobConf, FileInputFormat}
+import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
 import org.apache.hadoop.mapreduce.{Job, TaskAttemptContext}
 
 import org.apache.spark.{Logging, SparkContext}
@@ -448,15 +447,9 @@ abstract class HadoopFsRelation private[sql](
           val hdfsPath = new Path(path)
           val fs = hdfsPath.getFileSystem(hadoopConf)
           val qualified = hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
+
           logInfo(s"Listing $qualified on driver")
-          // Dummy jobconf to get to the pathFilter defined in configuration
-          val jobConf = new JobConf(hadoopConf, this.getClass())
-          val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
-          if (pathFilter != null) {
-            Try(fs.listStatus(qualified, pathFilter)).getOrElse(Array.empty)
-          } else {
-            Try(fs.listStatus(qualified)).getOrElse(Array.empty)
-          }
+          Try(fs.listStatus(qualified)).getOrElse(Array.empty)
         }.filterNot { status =>
           val name = status.getPath.getName
           name.toLowerCase == "_temporary" || name.startsWith(".")
@@ -854,16 +847,8 @@ private[sql] object HadoopFsRelation extends Logging {
     if (name == "_temporary" || name.startsWith(".")) {
       Array.empty
     } else {
-      // Dummy jobconf to get to the pathFilter defined in configuration
-      val jobConf = new JobConf(fs.getConf, this.getClass())
-      val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
-      if (pathFilter != null) {
-        val (dirs, files) = fs.listStatus(status.getPath, pathFilter).partition(_.isDir)
-        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
-      } else {
-        val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
-        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
-      }
+      val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
+      files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index f09b61e83815..6042b1178aff 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -19,27 +19,19 @@ package org.apache.spark.sql.execution.datasources.json
 
 import java.io.{File, StringWriter}
 import java.sql.{Date, Timestamp}
-import scala.collection.JavaConverters._
 
 import com.fasterxml.jackson.core.JsonFactory
-import org.apache.commons.io.FileUtils
-import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.fs.{Path, PathFilter}
+import org.apache.spark.rdd.RDD
 import org.scalactic.Tolerance._
 
-import org.apache.spark.rdd.RDD
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
-import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
+import org.apache.spark.sql.execution.datasources.{ResolvedDataSource, LogicalRelation}
 import org.apache.spark.sql.execution.datasources.json.InferSchema.compatibleType
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
 
-class TestFileFilter extends PathFilter {
-  override def accept(path: Path): Boolean = path.getParent.getName != "p=2"
-}
-
 class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
   import testImplicits._
 
@@ -1398,28 +1390,4 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
       )
     }
   }
-
-  test("SPARK-11544 test pathfilter") {
-    withTempPath { dir =>
-      val path = dir.getCanonicalPath
-
-      val df = sqlContext.range(2)
-      df.write.json(path + "/p=1")
-      df.write.json(path + "/p=2")
-      assert(sqlContext.read.json(path).count() === 4)
-
-      val clonedConf = new Configuration(hadoopConfiguration)
-      try {
-        hadoopConfiguration.setClass(
-          "mapreduce.input.pathFilter.class",
-          classOf[TestFileFilter],
-          classOf[PathFilter])
-        assert(sqlContext.read.json(path).count() === 2)
-      } finally {
-        // Hadoop 1 doesn't have `Configuration.unset`
-        hadoopConfiguration.clear()
-        clonedConf.asScala.foreach(entry => hadoopConfiguration.set(entry.getKey, entry.getValue))
-      }
-    }
-  }
 }

From 67c75828ff4df2e305bdf5d6be5a11201d1da3f3 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Wed, 18 Nov 2015 18:49:46 -0800
Subject: [PATCH 792/896] [SPARK-11816][ML] fix some style issue in ML/MLlib
 examples

jira: https://issues.apache.org/jira/browse/SPARK-11816
Currently I only fixed some obvious comments issue like
// scalastyle:off println
on the bottom.

Yet the style in examples is not quite consistent, like only half of the examples  are with
// Example usage: ./bin/run-example mllib.FPGrowthExample \,

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #9808 from hhbyyh/exampleStyle.
---
 .../java/org/apache/spark/examples/ml/JavaKMeansExample.java    | 2 +-
 .../apache/spark/examples/ml/AFTSurvivalRegressionExample.scala | 2 +-
 .../spark/examples/ml/DecisionTreeClassificationExample.scala   | 1 +
 .../spark/examples/ml/DecisionTreeRegressionExample.scala       | 1 +
 .../examples/ml/MultilayerPerceptronClassifierExample.scala     | 2 +-
 5 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaKMeansExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaKMeansExample.java
index be2bf0c7b465..47665ff2b1f3 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaKMeansExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaKMeansExample.java
@@ -41,7 +41,7 @@
  * An example demonstrating a k-means clustering.
  * Run with
  * <pre>
- * bin/run-example ml.JavaSimpleParamsExample <file> <k>
+ * bin/run-example ml.JavaKMeansExample <file> <k>
  * </pre>
  */
 public class JavaKMeansExample {
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala
index 5da285e83681..f4b3613ccb94 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/AFTSurvivalRegressionExample.scala
@@ -59,4 +59,4 @@ object AFTSurvivalRegressionExample {
     sc.stop()
   }
 }
-// scalastyle:off println
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
index ff8a0a90f1e4..db024b5cad93 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeClassificationExample.scala
@@ -90,3 +90,4 @@ object DecisionTreeClassificationExample {
     // $example off$
   }
 }
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
index fc402724d215..ad01f55df72b 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DecisionTreeRegressionExample.scala
@@ -78,3 +78,4 @@ object DecisionTreeRegressionExample {
     // $example off$
   }
 }
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
index 146b83c8be49..9c98076bd24b 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/MultilayerPerceptronClassifierExample.scala
@@ -66,4 +66,4 @@ object MultilayerPerceptronClassifierExample {
     sc.stop()
   }
 }
-// scalastyle:off println
+// scalastyle:on println

From fc3f77b42d62ca789d0ee07403795978961991c7 Mon Sep 17 00:00:00 2001
From: "navis.ryu" <navis@apache.org>
Date: Wed, 18 Nov 2015 19:37:14 -0800
Subject: [PATCH 793/896] [SPARK-11614][SQL] serde parameters should be set
 only when all params are ready

see HIVE-7975 and HIVE-12373

With changed semantic of setters in thrift objects in hive, setter should be called only after all parameters are set. It's not problem of current state but will be a problem in some day.

Author: navis.ryu <navis@apache.org>

Closes #9580 from navis/SPARK-11614.
---
 .../scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
index f4d45714fae4..9a981d02ad67 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveMetastoreCatalog.scala
@@ -804,12 +804,13 @@ private[hive] case class MetastoreRelation
 
       val serdeInfo = new org.apache.hadoop.hive.metastore.api.SerDeInfo
       sd.setSerdeInfo(serdeInfo)
+      // maps and lists should be set only after all elements are ready (see HIVE-7975)
       serdeInfo.setSerializationLib(p.storage.serde)
 
       val serdeParameters = new java.util.HashMap[String, String]()
-      serdeInfo.setParameters(serdeParameters)
       table.serdeProperties.foreach { case (k, v) => serdeParameters.put(k, v) }
       p.storage.serdeProperties.foreach { case (k, v) => serdeParameters.put(k, v) }
+      serdeInfo.setParameters(serdeParameters)
 
       new Partition(hiveQlTable, tPartition)
     }

From d02d5b9295b169c3ebb0967453b2835edb8a121f Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Wed, 18 Nov 2015 21:44:01 -0800
Subject: [PATCH 794/896] [SPARK-11842][ML] Small cleanups to existing Readers
 and Writers

Updates:
* Add repartition(1) to save() methods' saving of data for LogisticRegressionModel, LinearRegressionModel.
* Strengthen privacy to class and companion object for Writers and Readers
* Change LogisticRegressionSuite read/write test to fit intercept
* Add Since versions for read/write methods in Pipeline, LogisticRegression
* Switch from hand-written class names in Readers to using getClass

CC: mengxr

CC: yanboliang Would you mind taking a look at this PR?  mengxr might not be able to soon.  Thank you!

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9829 from jkbradley/ml-io-cleanups.
---
 .../scala/org/apache/spark/ml/Pipeline.scala  | 22 +++++++++++++------
 .../classification/LogisticRegression.scala   | 19 ++++++++++------
 .../spark/ml/feature/CountVectorizer.scala    |  2 +-
 .../org/apache/spark/ml/feature/IDF.scala     |  2 +-
 .../spark/ml/feature/MinMaxScaler.scala       |  2 +-
 .../spark/ml/feature/StandardScaler.scala     |  2 +-
 .../spark/ml/feature/StringIndexer.scala      |  2 +-
 .../apache/spark/ml/recommendation/ALS.scala  |  6 ++---
 .../ml/regression/LinearRegression.scala      |  4 ++--
 .../LogisticRegressionSuite.scala             |  2 +-
 10 files changed, 38 insertions(+), 25 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
index b0f22e042ec5..6f15b37abcb3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
@@ -27,7 +27,7 @@ import org.json4s._
 import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.{SparkContext, Logging}
-import org.apache.spark.annotation.{DeveloperApi, Experimental}
+import org.apache.spark.annotation.{Since, DeveloperApi, Experimental}
 import org.apache.spark.ml.param.{Param, ParamMap, Params}
 import org.apache.spark.ml.util.MLReader
 import org.apache.spark.ml.util.MLWriter
@@ -174,16 +174,20 @@ class Pipeline(override val uid: String) extends Estimator[PipelineModel] with M
     theStages.foldLeft(schema)((cur, stage) => stage.transformSchema(cur))
   }
 
+  @Since("1.6.0")
   override def write: MLWriter = new Pipeline.PipelineWriter(this)
 }
 
+@Since("1.6.0")
 object Pipeline extends MLReadable[Pipeline] {
 
+  @Since("1.6.0")
   override def read: MLReader[Pipeline] = new PipelineReader
 
+  @Since("1.6.0")
   override def load(path: String): Pipeline = super.load(path)
 
-  private[ml] class PipelineWriter(instance: Pipeline) extends MLWriter {
+  private[Pipeline] class PipelineWriter(instance: Pipeline) extends MLWriter {
 
     SharedReadWrite.validateStages(instance.getStages)
 
@@ -191,10 +195,10 @@ object Pipeline extends MLReadable[Pipeline] {
       SharedReadWrite.saveImpl(instance, instance.getStages, sc, path)
   }
 
-  private[ml] class PipelineReader extends MLReader[Pipeline] {
+  private class PipelineReader extends MLReader[Pipeline] {
 
     /** Checked against metadata when loading model */
-    private val className = "org.apache.spark.ml.Pipeline"
+    private val className = classOf[Pipeline].getName
 
     override def load(path: String): Pipeline = {
       val (uid: String, stages: Array[PipelineStage]) = SharedReadWrite.load(className, sc, path)
@@ -333,18 +337,22 @@ class PipelineModel private[ml] (
     new PipelineModel(uid, stages.map(_.copy(extra))).setParent(parent)
   }
 
+  @Since("1.6.0")
   override def write: MLWriter = new PipelineModel.PipelineModelWriter(this)
 }
 
+@Since("1.6.0")
 object PipelineModel extends MLReadable[PipelineModel] {
 
   import Pipeline.SharedReadWrite
 
+  @Since("1.6.0")
   override def read: MLReader[PipelineModel] = new PipelineModelReader
 
+  @Since("1.6.0")
   override def load(path: String): PipelineModel = super.load(path)
 
-  private[ml] class PipelineModelWriter(instance: PipelineModel) extends MLWriter {
+  private[PipelineModel] class PipelineModelWriter(instance: PipelineModel) extends MLWriter {
 
     SharedReadWrite.validateStages(instance.stages.asInstanceOf[Array[PipelineStage]])
 
@@ -352,10 +360,10 @@ object PipelineModel extends MLReadable[PipelineModel] {
       instance.stages.asInstanceOf[Array[PipelineStage]], sc, path)
   }
 
-  private[ml] class PipelineModelReader extends MLReader[PipelineModel] {
+  private class PipelineModelReader extends MLReader[PipelineModel] {
 
     /** Checked against metadata when loading model */
-    private val className = "org.apache.spark.ml.PipelineModel"
+    private val className = classOf[PipelineModel].getName
 
     override def load(path: String): PipelineModel = {
       val (uid: String, stages: Array[PipelineStage]) = SharedReadWrite.load(className, sc, path)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index a3cc49f7f018..418bbdc9a058 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -24,7 +24,7 @@ import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS,
 import org.apache.hadoop.fs.Path
 
 import org.apache.spark.{Logging, SparkException}
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Since, Experimental}
 import org.apache.spark.ml.feature.Instance
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
@@ -525,18 +525,23 @@ class LogisticRegressionModel private[ml] (
    *
    * This also does not save the [[parent]] currently.
    */
+  @Since("1.6.0")
   override def write: MLWriter = new LogisticRegressionModel.LogisticRegressionModelWriter(this)
 }
 
 
+@Since("1.6.0")
 object LogisticRegressionModel extends MLReadable[LogisticRegressionModel] {
 
+  @Since("1.6.0")
   override def read: MLReader[LogisticRegressionModel] = new LogisticRegressionModelReader
 
+  @Since("1.6.0")
   override def load(path: String): LogisticRegressionModel = super.load(path)
 
   /** [[MLWriter]] instance for [[LogisticRegressionModel]] */
-  private[classification] class LogisticRegressionModelWriter(instance: LogisticRegressionModel)
+  private[LogisticRegressionModel]
+  class LogisticRegressionModelWriter(instance: LogisticRegressionModel)
     extends MLWriter with Logging {
 
     private case class Data(
@@ -552,15 +557,15 @@ object LogisticRegressionModel extends MLReadable[LogisticRegressionModel] {
       val data = Data(instance.numClasses, instance.numFeatures, instance.intercept,
         instance.coefficients)
       val dataPath = new Path(path, "data").toString
-      sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
     }
   }
 
-  private[classification] class LogisticRegressionModelReader
+  private class LogisticRegressionModelReader
     extends MLReader[LogisticRegressionModel] {
 
     /** Checked against metadata when loading model */
-    private val className = "org.apache.spark.ml.classification.LogisticRegressionModel"
+    private val className = classOf[LogisticRegressionModel].getName
 
     override def load(path: String): LogisticRegressionModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
@@ -603,7 +608,7 @@ private[classification] class MultiClassSummarizer extends Serializable {
    * @return This MultilabelSummarizer
    */
   def add(label: Double, weight: Double = 1.0): this.type = {
-    require(weight >= 0.0, s"instance weight, ${weight} has to be >= 0.0")
+    require(weight >= 0.0, s"instance weight, $weight has to be >= 0.0")
 
     if (weight == 0.0) return this
 
@@ -839,7 +844,7 @@ private class LogisticAggregator(
     instance match { case Instance(label, weight, features) =>
       require(dim == features.size, s"Dimensions mismatch when adding new instance." +
         s" Expecting $dim but got ${features.size}.")
-      require(weight >= 0.0, s"instance weight, ${weight} has to be >= 0.0")
+      require(weight >= 0.0, s"instance weight, $weight has to be >= 0.0")
 
       if (weight == 0.0) return this
 
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
index 4969cf42450d..b9e2144c0ad4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/CountVectorizer.scala
@@ -266,7 +266,7 @@ object CountVectorizerModel extends MLReadable[CountVectorizerModel] {
 
   private class CountVectorizerModelReader extends MLReader[CountVectorizerModel] {
 
-    private val className = "org.apache.spark.ml.feature.CountVectorizerModel"
+    private val className = classOf[CountVectorizerModel].getName
 
     override def load(path: String): CountVectorizerModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
index 0e00ef6f2ee2..f7b0f29a27c2 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/IDF.scala
@@ -155,7 +155,7 @@ object IDFModel extends MLReadable[IDFModel] {
 
   private class IDFModelReader extends MLReader[IDFModel] {
 
-    private val className = "org.apache.spark.ml.feature.IDFModel"
+    private val className = classOf[IDFModel].getName
 
     override def load(path: String): IDFModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
index ed24eabb5044..c2866f5eceff 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/MinMaxScaler.scala
@@ -210,7 +210,7 @@ object MinMaxScalerModel extends MLReadable[MinMaxScalerModel] {
 
   private class MinMaxScalerModelReader extends MLReader[MinMaxScalerModel] {
 
-    private val className = "org.apache.spark.ml.feature.MinMaxScalerModel"
+    private val className = classOf[MinMaxScalerModel].getName
 
     override def load(path: String): MinMaxScalerModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
index 1f689c1da1ba..6d545219ebf4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
@@ -180,7 +180,7 @@ object StandardScalerModel extends MLReadable[StandardScalerModel] {
 
   private class StandardScalerModelReader extends MLReader[StandardScalerModel] {
 
-    private val className = "org.apache.spark.ml.feature.StandardScalerModel"
+    private val className = classOf[StandardScalerModel].getName
 
     override def load(path: String): StandardScalerModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
index 97a2e4f6d6ca..5c40c35eeaa4 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala
@@ -210,7 +210,7 @@ object StringIndexerModel extends MLReadable[StringIndexerModel] {
 
   private class StringIndexerModelReader extends MLReader[StringIndexerModel] {
 
-    private val className = "org.apache.spark.ml.feature.StringIndexerModel"
+    private val className = classOf[StringIndexerModel].getName
 
     override def load(path: String): StringIndexerModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index 795b73c4c212..4d35177ad9b0 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -237,7 +237,7 @@ object ALSModel extends MLReadable[ALSModel] {
   @Since("1.6.0")
   override def load(path: String): ALSModel = super.load(path)
 
-  private[recommendation] class ALSModelWriter(instance: ALSModel) extends MLWriter {
+  private[ALSModel] class ALSModelWriter(instance: ALSModel) extends MLWriter {
 
     override protected def saveImpl(path: String): Unit = {
       val extraMetadata = render("rank" -> instance.rank)
@@ -249,10 +249,10 @@ object ALSModel extends MLReadable[ALSModel] {
     }
   }
 
-  private[recommendation] class ALSModelReader extends MLReader[ALSModel] {
+  private class ALSModelReader extends MLReader[ALSModel] {
 
     /** Checked against metadata when loading model */
-    private val className = "org.apache.spark.ml.recommendation.ALSModel"
+    private val className = classOf[ALSModel].getName
 
     override def load(path: String): ALSModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 7ba1a60edaf7..70ccec766c47 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -467,14 +467,14 @@ object LinearRegressionModel extends MLReadable[LinearRegressionModel] {
       // Save model data: intercept, coefficients
       val data = Data(instance.intercept, instance.coefficients)
       val dataPath = new Path(path, "data").toString
-      sqlContext.createDataFrame(Seq(data)).write.format("parquet").save(dataPath)
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
     }
   }
 
   private class LinearRegressionModelReader extends MLReader[LinearRegressionModel] {
 
     /** Checked against metadata when loading model */
-    private val className = "org.apache.spark.ml.regression.LinearRegressionModel"
+    private val className = classOf[LinearRegressionModel].getName
 
     override def load(path: String): LinearRegressionModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
index 48ce1bb63068..a9a6ff8a783d 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/LogisticRegressionSuite.scala
@@ -898,7 +898,7 @@ object LogisticRegressionSuite {
     "regParam" -> 0.01,
     "elasticNetParam" -> 0.1,
     "maxIter" -> 2,  // intentionally small
-    "fitIntercept" -> false,
+    "fitIntercept" -> true,
     "tol" -> 0.8,
     "standardization" -> false,
     "threshold" -> 0.6

From 1a93323c5bab18ed7e55bf6f7b13aae88cb9721c Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Wed, 18 Nov 2015 23:32:49 -0800
Subject: [PATCH 795/896] [SPARK-11339][SPARKR] Document the list of functions
 in R base package that are masked by functions with same name in SparkR

Added tests for function that are reported as masked, to make sure the base:: or stats:: function can be called.

For those we can't call, added them to SparkR programming guide.

It would seem to me `table, sample, subset, filter, cov` not working are not actually expected - I investigated/experimented with them but couldn't get them to work. It looks like as they are defined in base or stats they are missing the S3 generic, eg.
```
> methods("transform")
[1] transform,ANY-method       transform.data.frame
[3] transform,DataFrame-method transform.default
see '?methods' for accessing help and source code
> methods("subset")
[1] subset.data.frame       subset,DataFrame-method subset.default
[4] subset.matrix
see '?methods' for accessing help and source code
Warning message:
In .S3methods(generic.function, class, parent.frame()) :
  function 'subset' appears not to be S3 generic; found functions that look like S3 methods
```
Any idea?

More information on masking:
http://www.ats.ucla.edu/stat/r/faq/referencing_objects.htm
http://www.sfu.ca/~sweldon/howTo/guide4.pdf

This is what the output doc looks like (minus css):
![image](https://cloud.githubusercontent.com/assets/8969467/11229714/2946e5de-8d4d-11e5-94b0-dda9696b6fdd.png)

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9785 from felixcheung/rmasked.
---
 R/pkg/R/DataFrame.R              |  2 +-
 R/pkg/R/functions.R              |  2 +-
 R/pkg/R/generics.R               |  4 ++--
 R/pkg/inst/tests/test_mllib.R    |  5 +++++
 R/pkg/inst/tests/test_sparkSQL.R | 33 +++++++++++++++++++++++++++-
 docs/sparkr.md                   | 37 +++++++++++++++++++++++++++++++-
 6 files changed, 77 insertions(+), 6 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 34177e3cdd94..06b0108b1389 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -2152,7 +2152,7 @@ setMethod("with",
           })
 
 #' Returns the column types of a DataFrame.
-#' 
+#'
 #' @name coltypes
 #' @title Get column types of a DataFrame
 #' @family dataframe_funcs
diff --git a/R/pkg/R/functions.R b/R/pkg/R/functions.R
index ff0f438045c1..25a1f2210149 100644
--- a/R/pkg/R/functions.R
+++ b/R/pkg/R/functions.R
@@ -2204,7 +2204,7 @@ setMethod("denseRank",
 #' @export
 #' @examples \dontrun{lag(df$c)}
 setMethod("lag",
-          signature(x = "characterOrColumn", offset = "numeric", defaultValue = "ANY"),
+          signature(x = "characterOrColumn"),
           function(x, offset, defaultValue = NULL) {
             col <- if (class(x) == "Column") {
               x@jc
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 0dcd05438222..71004a05ba61 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -539,7 +539,7 @@ setGeneric("showDF", function(x,...) { standardGeneric("showDF") })
 
 # @rdname subset
 # @export
-setGeneric("subset", function(x, subset, select, ...) { standardGeneric("subset") })
+setGeneric("subset", function(x, ...) { standardGeneric("subset") })
 
 #' @rdname agg
 #' @export
@@ -790,7 +790,7 @@ setGeneric("kurtosis", function(x) { standardGeneric("kurtosis") })
 
 #' @rdname lag
 #' @export
-setGeneric("lag", function(x, offset, defaultValue = NULL) { standardGeneric("lag") })
+setGeneric("lag", function(x, ...) { standardGeneric("lag") })
 
 #' @rdname last
 #' @export
diff --git a/R/pkg/inst/tests/test_mllib.R b/R/pkg/inst/tests/test_mllib.R
index d497ad8c9daa..e0667e5e22c1 100644
--- a/R/pkg/inst/tests/test_mllib.R
+++ b/R/pkg/inst/tests/test_mllib.R
@@ -31,6 +31,11 @@ test_that("glm and predict", {
   model <- glm(Sepal_Width ~ Sepal_Length, training, family = "gaussian")
   prediction <- predict(model, test)
   expect_equal(typeof(take(select(prediction, "prediction"), 1)$prediction), "double")
+
+  # Test stats::predict is working
+  x <- rnorm(15)
+  y <- x + rnorm(15)
+  expect_equal(length(predict(lm(y ~ x))), 15)
 })
 
 test_that("glm should work with long formula", {
diff --git a/R/pkg/inst/tests/test_sparkSQL.R b/R/pkg/inst/tests/test_sparkSQL.R
index d9a94faff7ac..3f4f319fe745 100644
--- a/R/pkg/inst/tests/test_sparkSQL.R
+++ b/R/pkg/inst/tests/test_sparkSQL.R
@@ -433,6 +433,10 @@ test_that("table() returns a new DataFrame", {
   expect_is(tabledf, "DataFrame")
   expect_equal(count(tabledf), 3)
   dropTempTable(sqlContext, "table1")
+
+  # Test base::table is working
+  #a <- letters[1:3]
+  #expect_equal(class(table(a, sample(a))), "table")
 })
 
 test_that("toRDD() returns an RRDD", {
@@ -673,6 +677,9 @@ test_that("sample on a DataFrame", {
   # Also test sample_frac
   sampled3 <- sample_frac(df, FALSE, 0.1, 0) # set seed for predictable result
   expect_true(count(sampled3) < 3)
+
+  # Test base::sample is working
+  #expect_equal(length(sample(1:12)), 12)
 })
 
 test_that("select operators", {
@@ -753,6 +760,9 @@ test_that("subsetting", {
   df6 <- subset(df, df$age %in% c(30), c(1,2))
   expect_equal(count(df6), 1)
   expect_equal(columns(df6), c("name", "age"))
+
+  # Test base::subset is working
+  expect_equal(nrow(subset(airquality, Temp > 80, select = c(Ozone, Temp))), 68)
 })
 
 test_that("selectExpr() on a DataFrame", {
@@ -888,6 +898,9 @@ test_that("column functions", {
   expect_equal(result, list(list(3L, 2L, 1L), list(6L, 5L, 4L)))
   result <- collect(select(df, sort_array(df[[1]])))[[1]]
   expect_equal(result, list(list(1L, 2L, 3L), list(4L, 5L, 6L)))
+
+  # Test that stats::lag is working
+  expect_equal(length(lag(ldeaths, 12)), 72)
 })
 #
 test_that("column binary mathfunctions", {
@@ -1086,7 +1099,7 @@ test_that("group by, agg functions", {
   gd3_local <- collect(agg(gd3, var(df8$age)))
   expect_equal(162, gd3_local[gd3_local$name == "Justin",][1, 2])
 
-  # make sure base:: or stats::sd, var are working
+  # Test stats::sd, stats::var are working
   expect_true(abs(sd(1:2) - 0.7071068) < 1e-6)
   expect_true(abs(var(1:5, 1:5) - 2.5) < 1e-6)
 
@@ -1138,6 +1151,9 @@ test_that("filter() on a DataFrame", {
   expect_equal(count(filtered5), 1)
   filtered6 <- where(df, df$age %in% c(19, 30))
   expect_equal(count(filtered6), 2)
+
+  # Test stats::filter is working
+  #expect_true(is.ts(filter(1:100, rep(1, 3))))
 })
 
 test_that("join() and merge() on a DataFrame", {
@@ -1284,6 +1300,12 @@ test_that("unionAll(), rbind(), except(), and intersect() on a DataFrame", {
   expect_is(unioned, "DataFrame")
   expect_equal(count(intersected), 1)
   expect_equal(first(intersected)$name, "Andy")
+
+  # Test base::rbind is working
+  expect_equal(length(rbind(1:4, c = 2, a = 10, 10, deparse.level = 0)), 16)
+
+  # Test base::intersect is working
+  expect_equal(length(intersect(1:20, 3:23)), 18)
 })
 
 test_that("withColumn() and withColumnRenamed()", {
@@ -1365,6 +1387,9 @@ test_that("describe() and summarize() on a DataFrame", {
   stats2 <- summary(df)
   expect_equal(collect(stats2)[4, "name"], "Andy")
   expect_equal(collect(stats2)[5, "age"], "30")
+
+  # Test base::summary is working
+  expect_equal(length(summary(attenu, digits = 4)), 35)
 })
 
 test_that("dropna() and na.omit() on a DataFrame", {
@@ -1448,6 +1473,9 @@ test_that("dropna() and na.omit() on a DataFrame", {
   expect_identical(expected, actual)
   actual <- collect(na.omit(df, minNonNulls = 3, cols = c("name", "age", "height")))
   expect_identical(expected, actual)
+
+  # Test stats::na.omit is working
+  expect_equal(nrow(na.omit(data.frame(x = c(0, 10, NA)))), 2)
 })
 
 test_that("fillna() on a DataFrame", {
@@ -1510,6 +1538,9 @@ test_that("cov() and corr() on a DataFrame", {
   expect_true(abs(result - 1.0) < 1e-12)
   result <- corr(df, "singles", "doubles", "pearson")
   expect_true(abs(result - 1.0) < 1e-12)
+
+  # Test stats::cov is working
+  #expect_true(abs(max(cov(swiss)) - 1739.295) < 1e-3)
 })
 
 test_that("freqItems() on a DataFrame", {
diff --git a/docs/sparkr.md b/docs/sparkr.md
index a744b76be746..cfb9b41350f4 100644
--- a/docs/sparkr.md
+++ b/docs/sparkr.md
@@ -286,7 +286,7 @@ head(teenagers)
 
 # Machine Learning
 
-SparkR allows the fitting of generalized linear models over DataFrames using the [glm()](api/R/glm.html) function. Under the hood, SparkR uses MLlib to train a model of the specified family. Currently the gaussian and binomial families are supported. We support a subset of the available R formula operators for model fitting, including '~', '.', ':', '+', and '-'. 
+SparkR allows the fitting of generalized linear models over DataFrames using the [glm()](api/R/glm.html) function. Under the hood, SparkR uses MLlib to train a model of the specified family. Currently the gaussian and binomial families are supported. We support a subset of the available R formula operators for model fitting, including '~', '.', ':', '+', and '-'.
 
 The [summary()](api/R/summary.html) function gives the summary of a model produced by [glm()](api/R/glm.html).
 
@@ -351,3 +351,38 @@ summary(model)
 ##Sepal_Width    0.404655
 {% endhighlight %}
 </div>
+
+# R Function Name Conflicts
+
+When loading and attaching a new package in R, it is possible to have a name [conflict](https://stat.ethz.ch/R-manual/R-devel/library/base/html/library.html), where a
+function is masking another function.
+
+The following functions are masked by the SparkR package:
+
+<table class="table">
+  <tr><th>Masked function</th><th>How to Access</th></tr>
+  <tr>
+    <td><code>cov</code> in <code>package:stats</code></td>
+    <td><code><pre>stats::cov(x, y = NULL, use = "everything",
+           method = c("pearson", "kendall", "spearman"))</pre></code></td>
+  </tr>
+  <tr>
+    <td><code>filter</code> in <code>package:stats</code></td>
+    <td><code><pre>stats::filter(x, filter, method = c("convolution", "recursive"),
+              sides = 2, circular = FALSE, init)</pre></code></td>
+  </tr>
+  <tr>
+    <td><code>sample</code> in <code>package:base</code></td>
+    <td><code>base::sample(x, size, replace = FALSE, prob = NULL)</code></td>
+  </tr>
+  <tr>
+    <td><code>table</code> in <code>package:base</code></td>
+    <td><code><pre>base::table(...,
+            exclude = if (useNA == "no") c(NA, NaN),
+            useNA = c("no", "ifany", "always"),
+            dnn = list.names(...), deparse.level = 1)</pre></code></td>
+  </tr>
+</table>
+
+You can inspect the search path in R with [`search()`](https://stat.ethz.ch/R-manual/R-devel/library/base/html/search.html)
+

From f449992009becc8f7c7f06cda522b9beaa1e263c Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 19 Nov 2015 10:48:04 -0800
Subject: [PATCH 796/896] [SPARK-11849][SQL] Analyzer should replace
 current_date and current_timestamp with literals

We currently rely on the optimizer's constant folding to replace current_timestamp and current_date. However, this can still result in different values for different instances of current_timestamp/current_date if the optimizer is not running fast enough.

A better solution is to replace these functions in the analyzer in one shot.

Author: Reynold Xin <rxin@databricks.com>

Closes #9833 from rxin/SPARK-11849.
---
 .../sql/catalyst/analysis/Analyzer.scala      | 27 ++++++++++---
 .../sql/catalyst/analysis/AnalysisSuite.scala | 38 +++++++++++++++++++
 2 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index f00c451b5981..84781cd57f3d 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -65,9 +65,8 @@ class Analyzer(
 
   lazy val batches: Seq[Batch] = Seq(
     Batch("Substitution", fixedPoint,
-      CTESubstitution ::
-      WindowsSubstitution ::
-      Nil : _*),
+      CTESubstitution,
+      WindowsSubstitution),
     Batch("Resolution", fixedPoint,
       ResolveRelations ::
       ResolveReferences ::
@@ -84,7 +83,8 @@ class Analyzer(
       HiveTypeCoercion.typeCoercionRules ++
       extendedResolutionRules : _*),
     Batch("Nondeterministic", Once,
-      PullOutNondeterministic),
+      PullOutNondeterministic,
+      ComputeCurrentTime),
     Batch("UDF", Once,
       HandleNullInputsForUDF),
     Batch("Cleanup", fixedPoint,
@@ -1076,7 +1076,7 @@ class Analyzer(
     override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
       case p if !p.resolved => p // Skip unresolved nodes.
 
-      case plan => plan transformExpressionsUp {
+      case p => p transformExpressionsUp {
 
         case udf @ ScalaUDF(func, _, inputs, _) =>
           val parameterTypes = ScalaReflection.getParameterTypes(func)
@@ -1162,3 +1162,20 @@ object CleanupAliases extends Rule[LogicalPlan] {
       }
   }
 }
+
+/**
+ * Computes the current date and time to make sure we return the same result in a single query.
+ */
+object ComputeCurrentTime extends Rule[LogicalPlan] {
+  def apply(plan: LogicalPlan): LogicalPlan = {
+    val dateExpr = CurrentDate()
+    val timeExpr = CurrentTimestamp()
+    val currentDate = Literal.create(dateExpr.eval(EmptyRow), dateExpr.dataType)
+    val currentTime = Literal.create(timeExpr.eval(EmptyRow), timeExpr.dataType)
+
+    plan transformAllExpressions {
+      case CurrentDate() => currentDate
+      case CurrentTimestamp() => currentTime
+    }
+  }
+}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
index 08586a97411a..e05106995188 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/AnalysisSuite.scala
@@ -22,6 +22,7 @@ import org.apache.spark.sql.catalyst.dsl.expressions._
 import org.apache.spark.sql.catalyst.dsl.plans._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.plans.logical._
+import org.apache.spark.sql.catalyst.util.DateTimeUtils
 import org.apache.spark.sql.types._
 
 class AnalysisSuite extends AnalysisTest {
@@ -218,4 +219,41 @@ class AnalysisSuite extends AnalysisTest {
       udf4)
     // checkUDF(udf4, expected4)
   }
+
+  test("analyzer should replace current_timestamp with literals") {
+    val in = Project(Seq(Alias(CurrentTimestamp(), "a")(), Alias(CurrentTimestamp(), "b")()),
+      LocalRelation())
+
+    val min = System.currentTimeMillis() * 1000
+    val plan = in.analyze.asInstanceOf[Project]
+    val max = (System.currentTimeMillis() + 1) * 1000
+
+    val lits = new scala.collection.mutable.ArrayBuffer[Long]
+    plan.transformAllExpressions { case e: Literal =>
+      lits += e.value.asInstanceOf[Long]
+      e
+    }
+    assert(lits.size == 2)
+    assert(lits(0) >= min && lits(0) <= max)
+    assert(lits(1) >= min && lits(1) <= max)
+    assert(lits(0) == lits(1))
+  }
+
+  test("analyzer should replace current_date with literals") {
+    val in = Project(Seq(Alias(CurrentDate(), "a")(), Alias(CurrentDate(), "b")()), LocalRelation())
+
+    val min = DateTimeUtils.millisToDays(System.currentTimeMillis())
+    val plan = in.analyze.asInstanceOf[Project]
+    val max = DateTimeUtils.millisToDays(System.currentTimeMillis())
+
+    val lits = new scala.collection.mutable.ArrayBuffer[Int]
+    plan.transformAllExpressions { case e: Literal =>
+      lits += e.value.asInstanceOf[Int]
+      e
+    }
+    assert(lits.size == 2)
+    assert(lits(0) >= min && lits(0) <= max)
+    assert(lits(1) >= min && lits(1) <= max)
+    assert(lits(0) == lits(1))
+  }
 }

From 962878843b611fa6229e3ee67bb22e2a4bc283cd Mon Sep 17 00:00:00 2001
From: Yin Huai <yhuai@databricks.com>
Date: Thu, 19 Nov 2015 11:02:17 -0800
Subject: [PATCH 797/896] [SPARK-11840][SQL] Restore the 1.5's behavior of
 planning a single distinct aggregation.

The impact of this change is for a query that has a single distinct column and does not have any grouping expression like
`SELECT COUNT(DISTINCT a) FROM table`
The plan will be changed from
```
AGG-2 (count distinct)
  Shuffle to a single reducer
    Partial-AGG-2 (count distinct)
      AGG-1 (grouping on a)
        Shuffle by a
          Partial-AGG-1 (grouping on 1)
```
to the following one (1.5 uses this)
```
AGG-2
  AGG-1 (grouping on a)
    Shuffle to a single reducer
      Partial-AGG-1(grouping on a)
```
The first plan is more robust. However, to better benchmark the impact of this change, we should use 1.5's plan and use the conf of `spark.sql.specializeSingleDistinctAggPlanning` to control the plan.

Author: Yin Huai <yhuai@databricks.com>

Closes #9828 from yhuai/distinctRewriter.
---
 .../sql/catalyst/analysis/DistinctAggregationRewriter.scala   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
index c0c960471a61..9c78f6d4cc71 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/DistinctAggregationRewriter.scala
@@ -126,8 +126,8 @@ case class DistinctAggregationRewriter(conf: CatalystConf) extends Rule[LogicalP
     val shouldRewrite = if (conf.specializeSingleDistinctAggPlanning) {
       // When the flag is set to specialize single distinct agg planning,
       // we will rely on our Aggregation strategy to handle queries with a single
-      // distinct column and this aggregate operator does have grouping expressions.
-      distinctAggGroups.size > 1 || (distinctAggGroups.size == 1 && a.groupingExpressions.isEmpty)
+      // distinct column.
+      distinctAggGroups.size > 1
     } else {
       distinctAggGroups.size >= 1
     }

From 72d150c271d2b206148fd0917a0def263445121b Mon Sep 17 00:00:00 2001
From: zsxwing <zsxwing@gmail.com>
Date: Thu, 19 Nov 2015 11:57:50 -0800
Subject: [PATCH 798/896] [SPARK-11830][CORE] Make NettyRpcEnv bind to the
 specified host

This PR includes the following change:

1. Bind NettyRpcEnv to the specified host
2. Fix the port information in the log for NettyRpcEnv.
3. Fix the service name of NettyRpcEnv.

Author: zsxwing <zsxwing@gmail.com>
Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9821 from zsxwing/SPARK-11830.
---
 .../src/main/scala/org/apache/spark/SparkEnv.scala |  9 ++++++++-
 .../org/apache/spark/rpc/netty/NettyRpcEnv.scala   |  7 +++----
 .../org/apache/spark/network/TransportContext.java |  8 +++++++-
 .../spark/network/server/TransportServer.java      | 14 ++++++++++----
 4 files changed, 28 insertions(+), 10 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 4474a83bedbd..88df27f733f2 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -258,8 +258,15 @@ object SparkEnv extends Logging {
       if (rpcEnv.isInstanceOf[AkkaRpcEnv]) {
         rpcEnv.asInstanceOf[AkkaRpcEnv].actorSystem
       } else {
+        val actorSystemPort = if (port == 0) 0 else rpcEnv.address.port + 1
         // Create a ActorSystem for legacy codes
-        AkkaUtils.createActorSystem(actorSystemName, hostname, port, conf, securityManager)._1
+        AkkaUtils.createActorSystem(
+          actorSystemName + "ActorSystem",
+          hostname,
+          actorSystemPort,
+          conf,
+          securityManager
+        )._1
       }
 
     // Figure out which port Akka actually bound to in case the original port is 0 or occupied.
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 3e0c49796950..3ce359868039 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -102,7 +102,7 @@ private[netty] class NettyRpcEnv(
       } else {
         java.util.Collections.emptyList()
       }
-    server = transportContext.createServer(port, bootstraps)
+    server = transportContext.createServer(host, port, bootstraps)
     dispatcher.registerRpcEndpoint(
       RpcEndpointVerifier.NAME, new RpcEndpointVerifier(this, dispatcher))
   }
@@ -337,10 +337,10 @@ private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
     if (!config.clientMode) {
       val startNettyRpcEnv: Int => (NettyRpcEnv, Int) = { actualPort =>
         nettyEnv.startServer(actualPort)
-        (nettyEnv, actualPort)
+        (nettyEnv, nettyEnv.address.port)
       }
       try {
-        Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, "NettyRpcEnv")._1
+        Utils.startServiceOnPort(config.port, startNettyRpcEnv, sparkConf, config.name)._1
       } catch {
         case NonFatal(e) =>
           nettyEnv.shutdown()
@@ -370,7 +370,6 @@ private[netty] class NettyRpcEnvFactory extends RpcEnvFactory with Logging {
  * @param conf Spark configuration.
  * @param endpointAddress The address where the endpoint is listening.
  * @param nettyEnv The RpcEnv associated with this ref.
- * @param local Whether the referenced endpoint lives in the same process.
  */
 private[netty] class NettyRpcEndpointRef(
     @transient private val conf: SparkConf,
diff --git a/network/common/src/main/java/org/apache/spark/network/TransportContext.java b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
index 1b64b863a9fe..238710d17249 100644
--- a/network/common/src/main/java/org/apache/spark/network/TransportContext.java
+++ b/network/common/src/main/java/org/apache/spark/network/TransportContext.java
@@ -94,7 +94,13 @@ public TransportClientFactory createClientFactory() {
 
   /** Create a server which will attempt to bind to a specific port. */
   public TransportServer createServer(int port, List<TransportServerBootstrap> bootstraps) {
-    return new TransportServer(this, port, rpcHandler, bootstraps);
+    return new TransportServer(this, null, port, rpcHandler, bootstraps);
+  }
+
+  /** Create a server which will attempt to bind to a specific host and port. */
+  public TransportServer createServer(
+      String host, int port, List<TransportServerBootstrap> bootstraps) {
+    return new TransportServer(this, host, port, rpcHandler, bootstraps);
   }
 
   /** Creates a new server, binding to any available ephemeral port. */
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportServer.java b/network/common/src/main/java/org/apache/spark/network/server/TransportServer.java
index f4fadb1ee3b8..baae235e0220 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportServer.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportServer.java
@@ -55,9 +55,13 @@ public class TransportServer implements Closeable {
   private ChannelFuture channelFuture;
   private int port = -1;
 
-  /** Creates a TransportServer that binds to the given port, or to any available if 0. */
+  /**
+   * Creates a TransportServer that binds to the given host and the given port, or to any available
+   * if 0. If you don't want to bind to any special host, set "hostToBind" to null.
+   * */
   public TransportServer(
       TransportContext context,
+      String hostToBind,
       int portToBind,
       RpcHandler appRpcHandler,
       List<TransportServerBootstrap> bootstraps) {
@@ -67,7 +71,7 @@ public TransportServer(
     this.bootstraps = Lists.newArrayList(Preconditions.checkNotNull(bootstraps));
 
     try {
-      init(portToBind);
+      init(hostToBind, portToBind);
     } catch (RuntimeException e) {
       JavaUtils.closeQuietly(this);
       throw e;
@@ -81,7 +85,7 @@ public int getPort() {
     return port;
   }
 
-  private void init(int portToBind) {
+  private void init(String hostToBind, int portToBind) {
 
     IOMode ioMode = IOMode.valueOf(conf.ioMode());
     EventLoopGroup bossGroup =
@@ -120,7 +124,9 @@ protected void initChannel(SocketChannel ch) throws Exception {
       }
     });
 
-    channelFuture = bootstrap.bind(new InetSocketAddress(portToBind));
+    InetSocketAddress address = hostToBind == null ?
+        new InetSocketAddress(portToBind): new InetSocketAddress(hostToBind, portToBind);
+    channelFuture = bootstrap.bind(address);
     channelFuture.syncUninterruptibly();
 
     port = ((InetSocketAddress) channelFuture.channel().localAddress()).getPort();

From 276a7e130252c0e7aba702ae5570b3c4f424b23b Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Thu, 19 Nov 2015 12:45:04 -0800
Subject: [PATCH 799/896] [SPARK-11633][SQL] LogicalRDD throws TreeNode
 Exception : Failed to Copy Node

When handling self joins, the implementation did not consider the case insensitivity of HiveContext. It could cause an exception as shown in the JIRA:
```
TreeNodeException: Failed to copy node.
```

The fix is low risk. It avoids unnecessary attribute replacement. It should not affect the existing behavior of self joins. Also added the test case to cover this case.

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9762 from gatorsmile/joinMakeCopy.
---
 .../apache/spark/sql/execution/ExistingRDD.scala   |  4 ++++
 .../org/apache/spark/sql/DataFrameSuite.scala      | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
index 62620ec642c7..623348f6768a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/ExistingRDD.scala
@@ -74,6 +74,10 @@ private[sql] case class LogicalRDD(
 
   override def children: Seq[LogicalPlan] = Nil
 
+  override protected final def otherCopyArgs: Seq[AnyRef] = {
+    sqlContext :: Nil
+  }
+
   override def newInstance(): LogicalRDD.this.type =
     LogicalRDD(output.map(_.newInstance()), rdd)(sqlContext).asInstanceOf[this.type]
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index 6399b0165c4c..dd6d06512ff6 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -1110,6 +1110,20 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
     }
   }
 
+  // This test case is to verify a bug when making a new instance of LogicalRDD.
+  test("SPARK-11633: LogicalRDD throws TreeNode Exception: Failed to Copy Node") {
+    withSQLConf(SQLConf.CASE_SENSITIVE.key -> "false") {
+      val rdd = sparkContext.makeRDD(Seq(Row(1, 3), Row(2, 1)))
+      val df = sqlContext.createDataFrame(
+        rdd,
+        new StructType().add("f1", IntegerType).add("f2", IntegerType),
+        needsConversion = false).select($"F1", $"f2".as("f2"))
+      val df1 = df.as("a")
+      val df2 = df.as("b")
+      checkAnswer(df1.join(df2, $"a.f2" === $"b.f2"), Row(1, 3, 1, 3) :: Row(2, 1, 2, 1) :: Nil)
+    }
+  }
+
   test("SPARK-10656: completely support special chars") {
     val df = Seq(1 -> "a").toDF("i_$.a", "d^'a.")
     checkAnswer(df.select(df("*")), Row(1, "a"))

From 7d4aba18722727c85893ad8d8f07d4494665dcfc Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Thu, 19 Nov 2015 12:46:36 -0800
Subject: [PATCH 800/896] [SPARK-11848][SQL] Support EXPLAIN in DataSet APIs

When debugging DataSet API, I always need to print the logical and physical plans.

I am wondering if we should provide a simple API for EXPLAIN?

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9832 from gatorsmile/explainDS.
---
 .../org/apache/spark/sql/DataFrame.scala      | 23 +------------------
 .../spark/sql/execution/Queryable.scala       | 21 +++++++++++++++++
 2 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 3ba4ba18d212..98358127e270 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -37,7 +37,7 @@ import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
-import org.apache.spark.sql.execution.{EvaluatePython, ExplainCommand, FileRelation, LogicalRDD, QueryExecution, Queryable, SQLExecution}
+import org.apache.spark.sql.execution.{EvaluatePython, FileRelation, LogicalRDD, QueryExecution, Queryable, SQLExecution}
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation}
 import org.apache.spark.sql.execution.datasources.json.JacksonGenerator
 import org.apache.spark.sql.sources.HadoopFsRelation
@@ -308,27 +308,6 @@ class DataFrame private[sql](
   def printSchema(): Unit = println(schema.treeString)
   // scalastyle:on println
 
-  /**
-   * Prints the plans (logical and physical) to the console for debugging purposes.
-   * @group basic
-   * @since 1.3.0
-   */
-  def explain(extended: Boolean): Unit = {
-    val explain = ExplainCommand(queryExecution.logical, extended = extended)
-    withPlan(explain).queryExecution.executedPlan.executeCollect().foreach {
-      // scalastyle:off println
-      r => println(r.getString(0))
-      // scalastyle:on println
-    }
-  }
-
-  /**
-   * Only prints the physical plan to the console for debugging purposes.
-   * @group basic
-   * @since 1.3.0
-   */
-  def explain(): Unit = explain(extended = false)
-
   /**
    * Returns true if the `collect` and `take` methods can be run locally
    * (without any Spark executors).
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
index 9ca383896a09..e86a52c149a2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.execution
 
+import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.types.StructType
 
 import scala.util.control.NonFatal
@@ -25,6 +26,7 @@ import scala.util.control.NonFatal
 private[sql] trait Queryable {
   def schema: StructType
   def queryExecution: QueryExecution
+  def sqlContext: SQLContext
 
   override def toString: String = {
     try {
@@ -34,4 +36,23 @@ private[sql] trait Queryable {
         s"Invalid tree; ${e.getMessage}:\n$queryExecution"
     }
   }
+
+  /**
+   * Prints the plans (logical and physical) to the console for debugging purposes.
+   * @since 1.3.0
+   */
+  def explain(extended: Boolean): Unit = {
+    val explain = ExplainCommand(queryExecution.logical, extended = extended)
+    sqlContext.executePlan(explain).executedPlan.executeCollect().foreach {
+      // scalastyle:off println
+      r => println(r.getString(0))
+      // scalastyle:on println
+    }
+  }
+
+  /**
+   * Only prints the physical plan to the console for debugging purposes.
+   * @since 1.3.0
+   */
+  def explain(): Unit = explain(extended = false)
 }

From 47d1c2325caaf9ffe31695b6fff529314b8582f7 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Thu, 19 Nov 2015 12:54:25 -0800
Subject: [PATCH 801/896] [SPARK-11750][SQL] revert SPARK-11727 and code clean
 up

After some experiment, I found it's not convenient to have separate encoder builders: `FlatEncoder` and `ProductEncoder`. For example, when create encoders for `ScalaUDF`, we have no idea if the type `T` is flat or not. So I revert the splitting change in https://github.com/apache/spark/pull/9693, while still keeping the bug fixes and tests.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9726 from cloud-fan/follow.
---
 .../scala/org/apache/spark/sql/Encoder.scala  |  16 +-
 .../spark/sql/catalyst/ScalaReflection.scala  | 354 +++++---------
 .../catalyst/encoders/ExpressionEncoder.scala |  19 +-
 .../sql/catalyst/encoders/FlatEncoder.scala   |  50 --
 .../catalyst/encoders/ProductEncoder.scala    | 452 ------------------
 .../sql/catalyst/encoders/RowEncoder.scala    |  12 +-
 .../sql/catalyst/expressions/objects.scala    |   7 +-
 .../sql/catalyst/ScalaReflectionSuite.scala   |  68 ---
 .../encoders/ExpressionEncoderSuite.scala     | 218 ++++++++-
 .../catalyst/encoders/FlatEncoderSuite.scala  |  99 ----
 .../encoders/ProductEncoderSuite.scala        | 156 ------
 .../org/apache/spark/sql/GroupedDataset.scala |   4 +-
 .../org/apache/spark/sql/SQLImplicits.scala   |  23 +-
 .../org/apache/spark/sql/functions.scala      |   4 +-
 14 files changed, 364 insertions(+), 1118 deletions(-)
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
 delete mode 100644 sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
 delete mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
 delete mode 100644 sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index d54f2854fb33..86bb53645903 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -45,14 +45,14 @@ trait Encoder[T] extends Serializable {
  */
 object Encoders {
 
-  def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder(flat = true)
-  def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder(flat = true)
-  def SHORT: Encoder[java.lang.Short] = ExpressionEncoder(flat = true)
-  def INT: Encoder[java.lang.Integer] = ExpressionEncoder(flat = true)
-  def LONG: Encoder[java.lang.Long] = ExpressionEncoder(flat = true)
-  def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder(flat = true)
-  def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder(flat = true)
-  def STRING: Encoder[java.lang.String] = ExpressionEncoder(flat = true)
+  def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder()
+  def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder()
+  def SHORT: Encoder[java.lang.Short] = ExpressionEncoder()
+  def INT: Encoder[java.lang.Integer] = ExpressionEncoder()
+  def LONG: Encoder[java.lang.Long] = ExpressionEncoder()
+  def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder()
+  def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder()
+  def STRING: Encoder[java.lang.String] = ExpressionEncoder()
 
   /**
    * (Scala-specific) Creates an encoder that serializes objects of type T using Kryo.
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 59ccf356f2c4..33ae700706da 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -50,39 +50,29 @@ object ScalaReflection extends ScalaReflection {
    * Unlike `schemaFor`, this function doesn't do any massaging of types into the Spark SQL type
    * system.  As a result, ObjectType will be returned for things like boxed Integers
    */
-  def dataTypeFor(tpe: `Type`): DataType = tpe match {
-    case t if t <:< definitions.IntTpe => IntegerType
-    case t if t <:< definitions.LongTpe => LongType
-    case t if t <:< definitions.DoubleTpe => DoubleType
-    case t if t <:< definitions.FloatTpe => FloatType
-    case t if t <:< definitions.ShortTpe => ShortType
-    case t if t <:< definitions.ByteTpe => ByteType
-    case t if t <:< definitions.BooleanTpe => BooleanType
-    case t if t <:< localTypeOf[Array[Byte]] => BinaryType
-    case _ =>
-      val className: String = tpe.erasure.typeSymbol.asClass.fullName
-      className match {
-        case "scala.Array" =>
-          val TypeRef(_, _, Seq(arrayType)) = tpe
-          val cls = arrayType match {
-            case t if t <:< definitions.IntTpe => classOf[Array[Int]]
-            case t if t <:< definitions.LongTpe => classOf[Array[Long]]
-            case t if t <:< definitions.DoubleTpe => classOf[Array[Double]]
-            case t if t <:< definitions.FloatTpe => classOf[Array[Float]]
-            case t if t <:< definitions.ShortTpe => classOf[Array[Short]]
-            case t if t <:< definitions.ByteTpe => classOf[Array[Byte]]
-            case t if t <:< definitions.BooleanTpe => classOf[Array[Boolean]]
-            case other =>
-              // There is probably a better way to do this, but I couldn't find it...
-              val elementType = dataTypeFor(other).asInstanceOf[ObjectType].cls
-              java.lang.reflect.Array.newInstance(elementType, 1).getClass
+  def dataTypeFor[T : TypeTag]: DataType = dataTypeFor(localTypeOf[T])
 
-          }
-          ObjectType(cls)
-        case other =>
-          val clazz = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
-          ObjectType(clazz)
-      }
+  private def dataTypeFor(tpe: `Type`): DataType = ScalaReflectionLock.synchronized {
+    tpe match {
+      case t if t <:< definitions.IntTpe => IntegerType
+      case t if t <:< definitions.LongTpe => LongType
+      case t if t <:< definitions.DoubleTpe => DoubleType
+      case t if t <:< definitions.FloatTpe => FloatType
+      case t if t <:< definitions.ShortTpe => ShortType
+      case t if t <:< definitions.ByteTpe => ByteType
+      case t if t <:< definitions.BooleanTpe => BooleanType
+      case t if t <:< localTypeOf[Array[Byte]] => BinaryType
+      case _ =>
+        val className: String = tpe.erasure.typeSymbol.asClass.fullName
+        className match {
+          case "scala.Array" =>
+            val TypeRef(_, _, Seq(elementType)) = tpe
+            arrayClassFor(elementType)
+          case other =>
+            val clazz = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
+            ObjectType(clazz)
+        }
+    }
   }
 
   /**
@@ -90,7 +80,7 @@ object ScalaReflection extends ScalaReflection {
    * Array[T].  Special handling is performed for primitive types to map them back to their raw
    * JVM form instead of the Scala Array that handles auto boxing.
    */
-  def arrayClassFor(tpe: `Type`): DataType = {
+  private def arrayClassFor(tpe: `Type`): DataType = ScalaReflectionLock.synchronized {
     val cls = tpe match {
       case t if t <:< definitions.IntTpe => classOf[Array[Int]]
       case t if t <:< definitions.LongTpe => classOf[Array[Long]]
@@ -108,6 +98,15 @@ object ScalaReflection extends ScalaReflection {
     ObjectType(cls)
   }
 
+  /**
+   * Returns true if the value of this data type is same between internal and external.
+   */
+  def isNativeType(dt: DataType): Boolean = dt match {
+    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+         FloatType | DoubleType | BinaryType => true
+    case _ => false
+  }
+
   /**
    * Returns an expression that can be used to construct an object of type `T` given an input
    * row with a compatible schema.  Fields of the row will be extracted using UnresolvedAttributes
@@ -116,63 +115,33 @@ object ScalaReflection extends ScalaReflection {
    *
    * When used on a primitive type, the constructor will instead default to extracting the value
    * from ordinal 0 (since there are no names to map to).  The actual location can be moved by
-   * calling unbind/bind with a new schema.
+   * calling resolve/bind with a new schema.
    */
-  def constructorFor[T : TypeTag]: Expression = constructorFor(typeOf[T], None)
+  def constructorFor[T : TypeTag]: Expression = constructorFor(localTypeOf[T], None)
 
   private def constructorFor(
       tpe: `Type`,
       path: Option[Expression]): Expression = ScalaReflectionLock.synchronized {
 
     /** Returns the current path with a sub-field extracted. */
-    def addToPath(part: String): Expression =
-      path
-        .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
-        .getOrElse(UnresolvedAttribute(part))
+    def addToPath(part: String): Expression = path
+      .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
+      .getOrElse(UnresolvedAttribute(part))
 
     /** Returns the current path with a field at ordinal extracted. */
-    def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression =
-      path
-        .map(p => GetStructField(p, StructField(s"_$ordinal", dataType), ordinal))
-        .getOrElse(BoundReference(ordinal, dataType, false))
+    def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression = path
+      .map(p => GetInternalRowField(p, ordinal, dataType))
+      .getOrElse(BoundReference(ordinal, dataType, false))
 
-    /** Returns the current path or throws an error. */
-    def getPath = path.getOrElse(BoundReference(0, schemaFor(tpe).dataType, true))
+    /** Returns the current path or `BoundReference`. */
+    def getPath: Expression = path.getOrElse(BoundReference(0, schemaFor(tpe).dataType, true))
 
     tpe match {
-      case t if !dataTypeFor(t).isInstanceOf[ObjectType] =>
-        getPath
+      case t if !dataTypeFor(t).isInstanceOf[ObjectType] => getPath
 
       case t if t <:< localTypeOf[Option[_]] =>
         val TypeRef(_, _, Seq(optType)) = t
-        val boxedType = optType match {
-          // For primitive types we must manually box the primitive value.
-          case t if t <:< definitions.IntTpe => Some(classOf[java.lang.Integer])
-          case t if t <:< definitions.LongTpe => Some(classOf[java.lang.Long])
-          case t if t <:< definitions.DoubleTpe => Some(classOf[java.lang.Double])
-          case t if t <:< definitions.FloatTpe => Some(classOf[java.lang.Float])
-          case t if t <:< definitions.ShortTpe => Some(classOf[java.lang.Short])
-          case t if t <:< definitions.ByteTpe => Some(classOf[java.lang.Byte])
-          case t if t <:< definitions.BooleanTpe => Some(classOf[java.lang.Boolean])
-          case _ => None
-        }
-
-        boxedType.map { boxedType =>
-          val objectType = ObjectType(boxedType)
-          WrapOption(
-            objectType,
-            NewInstance(
-              boxedType,
-              getPath :: Nil,
-              propagateNull = true,
-              objectType))
-        }.getOrElse {
-          val className: String = optType.erasure.typeSymbol.asClass.fullName
-          val cls = Utils.classForName(className)
-          val objectType = ObjectType(cls)
-
-          WrapOption(objectType, constructorFor(optType, path))
-        }
+        WrapOption(constructorFor(optType, path))
 
       case t if t <:< localTypeOf[java.lang.Integer] =>
         val boxedType = classOf[java.lang.Integer]
@@ -231,11 +200,11 @@ object ScalaReflection extends ScalaReflection {
       case t if t <:< localTypeOf[java.math.BigDecimal] =>
         Invoke(getPath, "toJavaBigDecimal", ObjectType(classOf[java.math.BigDecimal]))
 
+      case t if t <:< localTypeOf[BigDecimal] =>
+        Invoke(getPath, "toBigDecimal", ObjectType(classOf[BigDecimal]))
+
       case t if t <:< localTypeOf[Array[_]] =>
         val TypeRef(_, _, Seq(elementType)) = t
-        val elementDataType = dataTypeFor(elementType)
-        val Schema(dataType, nullable) = schemaFor(elementType)
-
         val primitiveMethod = elementType match {
           case t if t <:< definitions.IntTpe => Some("toIntArray")
           case t if t <:< definitions.LongTpe => Some("toLongArray")
@@ -248,57 +217,52 @@ object ScalaReflection extends ScalaReflection {
         }
 
         primitiveMethod.map { method =>
-          Invoke(getPath, method, dataTypeFor(t))
+          Invoke(getPath, method, arrayClassFor(elementType))
         }.getOrElse {
-          val returnType = dataTypeFor(t)
           Invoke(
-            MapObjects(p => constructorFor(elementType, Some(p)), getPath, dataType),
+            MapObjects(
+              p => constructorFor(elementType, Some(p)),
+              getPath,
+              schemaFor(elementType).dataType),
             "array",
-            returnType)
+            arrayClassFor(elementType))
         }
 
+      case t if t <:< localTypeOf[Seq[_]] =>
+        val TypeRef(_, _, Seq(elementType)) = t
+        val arrayData =
+          Invoke(
+            MapObjects(
+              p => constructorFor(elementType, Some(p)),
+              getPath,
+              schemaFor(elementType).dataType),
+            "array",
+            ObjectType(classOf[Array[Any]]))
+
+        StaticInvoke(
+          scala.collection.mutable.WrappedArray,
+          ObjectType(classOf[Seq[_]]),
+          "make",
+          arrayData :: Nil)
+
       case t if t <:< localTypeOf[Map[_, _]] =>
         val TypeRef(_, _, Seq(keyType, valueType)) = t
-        val Schema(keyDataType, _) = schemaFor(keyType)
-        val Schema(valueDataType, valueNullable) = schemaFor(valueType)
-
-        val primitiveMethodKey = keyType match {
-          case t if t <:< definitions.IntTpe => Some("toIntArray")
-          case t if t <:< definitions.LongTpe => Some("toLongArray")
-          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
-          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
-          case t if t <:< definitions.ShortTpe => Some("toShortArray")
-          case t if t <:< definitions.ByteTpe => Some("toByteArray")
-          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
-          case _ => None
-        }
 
         val keyData =
           Invoke(
             MapObjects(
               p => constructorFor(keyType, Some(p)),
-              Invoke(getPath, "keyArray", ArrayType(keyDataType)),
-              keyDataType),
+              Invoke(getPath, "keyArray", ArrayType(schemaFor(keyType).dataType)),
+              schemaFor(keyType).dataType),
             "array",
             ObjectType(classOf[Array[Any]]))
 
-        val primitiveMethodValue = valueType match {
-          case t if t <:< definitions.IntTpe => Some("toIntArray")
-          case t if t <:< definitions.LongTpe => Some("toLongArray")
-          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
-          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
-          case t if t <:< definitions.ShortTpe => Some("toShortArray")
-          case t if t <:< definitions.ByteTpe => Some("toByteArray")
-          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
-          case _ => None
-        }
-
         val valueData =
           Invoke(
             MapObjects(
               p => constructorFor(valueType, Some(p)),
-              Invoke(getPath, "valueArray", ArrayType(valueDataType)),
-              valueDataType),
+              Invoke(getPath, "valueArray", ArrayType(schemaFor(valueType).dataType)),
+              schemaFor(valueType).dataType),
             "array",
             ObjectType(classOf[Array[Any]]))
 
@@ -308,40 +272,6 @@ object ScalaReflection extends ScalaReflection {
           "toScalaMap",
           keyData :: valueData :: Nil)
 
-      case t if t <:< localTypeOf[Seq[_]] =>
-        val TypeRef(_, _, Seq(elementType)) = t
-        val elementDataType = dataTypeFor(elementType)
-        val Schema(dataType, nullable) = schemaFor(elementType)
-
-        // Avoid boxing when possible by just wrapping a primitive array.
-        val primitiveMethod = elementType match {
-          case _ if nullable => None
-          case t if t <:< definitions.IntTpe => Some("toIntArray")
-          case t if t <:< definitions.LongTpe => Some("toLongArray")
-          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
-          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
-          case t if t <:< definitions.ShortTpe => Some("toShortArray")
-          case t if t <:< definitions.ByteTpe => Some("toByteArray")
-          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
-          case _ => None
-        }
-
-        val arrayData = primitiveMethod.map { method =>
-          Invoke(getPath, method, arrayClassFor(elementType))
-        }.getOrElse {
-          Invoke(
-            MapObjects(p => constructorFor(elementType, Some(p)), getPath, dataType),
-            "array",
-            arrayClassFor(elementType))
-        }
-
-        StaticInvoke(
-          scala.collection.mutable.WrappedArray,
-          ObjectType(classOf[Seq[_]]),
-          "make",
-          arrayData :: Nil)
-
-
       case t if t <:< localTypeOf[Product] =>
         val formalTypeArgs = t.typeSymbol.asClass.typeParams
         val TypeRef(_, _, actualTypeArgs) = t
@@ -361,8 +291,7 @@ object ScalaReflection extends ScalaReflection {
           }
         }
 
-        val className: String = t.erasure.typeSymbol.asClass.fullName
-        val cls = Utils.classForName(className)
+        val cls = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
 
         val arguments = params.head.zipWithIndex.map { case (p, i) =>
           val fieldName = p.name.toString
@@ -370,7 +299,7 @@ object ScalaReflection extends ScalaReflection {
           val dataType = schemaFor(fieldType).dataType
 
           // For tuples, we based grab the inner fields by ordinal instead of name.
-          if (className startsWith "scala.Tuple") {
+          if (cls.getName startsWith "scala.Tuple") {
             constructorFor(fieldType, Some(addToPathOrdinal(i, dataType)))
           } else {
             constructorFor(fieldType, Some(addToPath(fieldName)))
@@ -388,22 +317,19 @@ object ScalaReflection extends ScalaReflection {
         } else {
           newInstance
         }
-
     }
   }
 
   /** Returns expressions for extracting all the fields from the given type. */
   def extractorsFor[T : TypeTag](inputObject: Expression): CreateNamedStruct = {
-    ScalaReflectionLock.synchronized {
-      extractorFor(inputObject, typeTag[T].tpe) match {
-        case s: CreateNamedStruct => s
-        case o => CreateNamedStruct(expressions.Literal("value") :: o :: Nil)
-      }
+    extractorFor(inputObject, localTypeOf[T]) match {
+      case s: CreateNamedStruct => s
+      case other => CreateNamedStruct(expressions.Literal("value") :: other :: Nil)
     }
   }
 
   /** Helper for extracting internal fields from a case class. */
-  protected def extractorFor(
+  private def extractorFor(
       inputObject: Expression,
       tpe: `Type`): Expression = ScalaReflectionLock.synchronized {
     if (!inputObject.dataType.isInstanceOf[ObjectType]) {
@@ -491,51 +417,36 @@ object ScalaReflection extends ScalaReflection {
 
         case t if t <:< localTypeOf[Array[_]] =>
           val TypeRef(_, _, Seq(elementType)) = t
-          val elementDataType = dataTypeFor(elementType)
-          val Schema(dataType, nullable) = schemaFor(elementType)
-
-          if (!elementDataType.isInstanceOf[AtomicType]) {
-            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
-          } else {
-            NewInstance(
-              classOf[GenericArrayData],
-              inputObject :: Nil,
-              dataType = ArrayType(dataType, nullable))
-          }
+          toCatalystArray(inputObject, elementType)
 
         case t if t <:< localTypeOf[Seq[_]] =>
           val TypeRef(_, _, Seq(elementType)) = t
-          val elementDataType = dataTypeFor(elementType)
-          val Schema(dataType, nullable) = schemaFor(elementType)
-
-          if (dataType.isInstanceOf[AtomicType]) {
-            NewInstance(
-              classOf[GenericArrayData],
-              inputObject :: Nil,
-              dataType = ArrayType(dataType, nullable))
-          } else {
-            MapObjects(extractorFor(_, elementType), inputObject, elementDataType)
-          }
+          toCatalystArray(inputObject, elementType)
 
         case t if t <:< localTypeOf[Map[_, _]] =>
           val TypeRef(_, _, Seq(keyType, valueType)) = t
-          val Schema(keyDataType, _) = schemaFor(keyType)
-          val Schema(valueDataType, valueNullable) = schemaFor(valueType)
 
-          val rawMap = inputObject
           val keys =
-            NewInstance(
-              classOf[GenericArrayData],
-              Invoke(rawMap, "keys", ObjectType(classOf[scala.collection.GenIterable[_]])) :: Nil,
-              dataType = ObjectType(classOf[ArrayData]))
+            Invoke(
+              Invoke(inputObject, "keysIterator",
+                ObjectType(classOf[scala.collection.Iterator[_]])),
+              "toSeq",
+              ObjectType(classOf[scala.collection.Seq[_]]))
+          val convertedKeys = toCatalystArray(keys, keyType)
+
           val values =
-            NewInstance(
-              classOf[GenericArrayData],
-              Invoke(rawMap, "values", ObjectType(classOf[scala.collection.GenIterable[_]])) :: Nil,
-              dataType = ObjectType(classOf[ArrayData]))
+            Invoke(
+              Invoke(inputObject, "valuesIterator",
+                ObjectType(classOf[scala.collection.Iterator[_]])),
+              "toSeq",
+              ObjectType(classOf[scala.collection.Seq[_]]))
+          val convertedValues = toCatalystArray(values, valueType)
+
+          val Schema(keyDataType, _) = schemaFor(keyType)
+          val Schema(valueDataType, valueNullable) = schemaFor(valueType)
           NewInstance(
             classOf[ArrayBasedMapData],
-            keys :: values :: Nil,
+            convertedKeys :: convertedValues :: Nil,
             dataType = MapType(keyDataType, valueDataType, valueNullable))
 
         case t if t <:< localTypeOf[String] =>
@@ -558,6 +469,7 @@ object ScalaReflection extends ScalaReflection {
             DateType,
             "fromJavaDate",
             inputObject :: Nil)
+
         case t if t <:< localTypeOf[BigDecimal] =>
           StaticInvoke(
             Decimal,
@@ -587,26 +499,24 @@ object ScalaReflection extends ScalaReflection {
         case t if t <:< localTypeOf[java.lang.Boolean] =>
           Invoke(inputObject, "booleanValue", BooleanType)
 
-        case t if t <:< definitions.IntTpe =>
-          BoundReference(0, IntegerType, false)
-        case t if t <:< definitions.LongTpe =>
-          BoundReference(0, LongType, false)
-        case t if t <:< definitions.DoubleTpe =>
-          BoundReference(0, DoubleType, false)
-        case t if t <:< definitions.FloatTpe =>
-          BoundReference(0, FloatType, false)
-        case t if t <:< definitions.ShortTpe =>
-          BoundReference(0, ShortType, false)
-        case t if t <:< definitions.ByteTpe =>
-          BoundReference(0, ByteType, false)
-        case t if t <:< definitions.BooleanTpe =>
-          BoundReference(0, BooleanType, false)
-
         case other =>
           throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
       }
     }
   }
+
+  private def toCatalystArray(input: Expression, elementType: `Type`): Expression = {
+    val externalDataType = dataTypeFor(elementType)
+    val Schema(catalystType, nullable) = schemaFor(elementType)
+    if (isNativeType(catalystType)) {
+      NewInstance(
+        classOf[GenericArrayData],
+        input :: Nil,
+        dataType = ArrayType(catalystType, nullable))
+    } else {
+      MapObjects(extractorFor(_, elementType), input, externalDataType)
+    }
+  }
 }
 
 /**
@@ -635,8 +545,7 @@ trait ScalaReflection {
   }
 
   /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
-  def schemaFor[T: TypeTag]: Schema =
-    ScalaReflectionLock.synchronized { schemaFor(localTypeOf[T]) }
+  def schemaFor[T: TypeTag]: Schema = schemaFor(localTypeOf[T])
 
   /**
    * Return the Scala Type for `T` in the current classloader mirror.
@@ -736,39 +645,4 @@ trait ScalaReflection {
     assert(methods.length == 1)
     methods.head.getParameterTypes
   }
-
-  def typeOfObject: PartialFunction[Any, DataType] = {
-    // The data type can be determined without ambiguity.
-    case obj: Boolean => BooleanType
-    case obj: Array[Byte] => BinaryType
-    case obj: String => StringType
-    case obj: UTF8String => StringType
-    case obj: Byte => ByteType
-    case obj: Short => ShortType
-    case obj: Int => IntegerType
-    case obj: Long => LongType
-    case obj: Float => FloatType
-    case obj: Double => DoubleType
-    case obj: java.sql.Date => DateType
-    case obj: java.math.BigDecimal => DecimalType.SYSTEM_DEFAULT
-    case obj: Decimal => DecimalType.SYSTEM_DEFAULT
-    case obj: java.sql.Timestamp => TimestampType
-    case null => NullType
-    // For other cases, there is no obvious mapping from the type of the given object to a
-    // Catalyst data type. A user should provide his/her specific rules
-    // (in a user-defined PartialFunction) to infer the Catalyst data type for other types of
-    // objects and then compose the user-defined PartialFunction with this one.
-  }
-
-  implicit class CaseClassRelation[A <: Product : TypeTag](data: Seq[A]) {
-
-    /**
-     * Implicitly added to Sequences of case class objects.  Returns a catalyst logical relation
-     * for the the data in the sequence.
-     */
-    def asRelation: LocalRelation = {
-      val output = attributesFor[A]
-      LocalRelation.fromProduct(output, data)
-    }
-  }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 456b59500847..6eeba1442c1f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -30,10 +30,10 @@ import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.codegen.{GenerateSafeProjection, GenerateUnsafeProjection}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.ScalaReflection
-import org.apache.spark.sql.types.{NullType, StructField, ObjectType, StructType}
+import org.apache.spark.sql.types.{StructField, ObjectType, StructType}
 
 /**
- * A factory for constructing encoders that convert objects and primitves to and from the
+ * A factory for constructing encoders that convert objects and primitives to and from the
  * internal row format using catalyst expressions and code generation.  By default, the
  * expressions used to retrieve values from an input row when producing an object will be created as
  * follows:
@@ -44,20 +44,21 @@ import org.apache.spark.sql.types.{NullType, StructField, ObjectType, StructType
  *    to the name `value`.
  */
 object ExpressionEncoder {
-  def apply[T : TypeTag](flat: Boolean = false): ExpressionEncoder[T] = {
+  def apply[T : TypeTag](): ExpressionEncoder[T] = {
     // We convert the not-serializable TypeTag into StructType and ClassTag.
     val mirror = typeTag[T].mirror
     val cls = mirror.runtimeClass(typeTag[T].tpe)
+    val flat = !classOf[Product].isAssignableFrom(cls)
 
-    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
-    val extractExpression = ScalaReflection.extractorsFor[T](inputObject)
-    val constructExpression = ScalaReflection.constructorFor[T]
+    val inputObject = BoundReference(0, ScalaReflection.dataTypeFor[T], nullable = true)
+    val toRowExpression = ScalaReflection.extractorsFor[T](inputObject)
+    val fromRowExpression = ScalaReflection.constructorFor[T]
 
     new ExpressionEncoder[T](
-      extractExpression.dataType,
+      toRowExpression.dataType,
       flat,
-      extractExpression.flatten,
-      constructExpression,
+      toRowExpression.flatten,
+      fromRowExpression,
       ClassTag[T](cls))
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
deleted file mode 100644
index 6d307ab13a9f..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoder.scala
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import scala.reflect.ClassTag
-import scala.reflect.runtime.universe.{typeTag, TypeTag}
-
-import org.apache.spark.sql.types.StructType
-import org.apache.spark.sql.catalyst.expressions.{Literal, CreateNamedStruct, BoundReference}
-import org.apache.spark.sql.catalyst.ScalaReflection
-
-object FlatEncoder {
-  import ScalaReflection.schemaFor
-  import ScalaReflection.dataTypeFor
-
-  def apply[T : TypeTag]: ExpressionEncoder[T] = {
-    // We convert the not-serializable TypeTag into StructType and ClassTag.
-    val tpe = typeTag[T].tpe
-    val mirror = typeTag[T].mirror
-    val cls = mirror.runtimeClass(tpe)
-    assert(!schemaFor(tpe).dataType.isInstanceOf[StructType])
-
-    val input = BoundReference(0, dataTypeFor(tpe), nullable = true)
-    val toRowExpression = CreateNamedStruct(
-      Literal("value") :: ProductEncoder.extractorFor(input, tpe) :: Nil)
-    val fromRowExpression = ProductEncoder.constructorFor(tpe)
-
-    new ExpressionEncoder[T](
-      toRowExpression.dataType,
-      flat = true,
-      toRowExpression.flatten,
-      fromRowExpression,
-      ClassTag[T](cls))
-  }
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
deleted file mode 100644
index 2914c6ee790c..000000000000
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoder.scala
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import org.apache.spark.util.Utils
-import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.sql.types._
-import org.apache.spark.sql.catalyst.ScalaReflectionLock
-import org.apache.spark.sql.catalyst.ScalaReflection
-import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, UnresolvedExtractValue}
-import org.apache.spark.sql.catalyst.expressions
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.{DateTimeUtils, ArrayBasedMapData, GenericArrayData}
-
-import scala.reflect.ClassTag
-
-object ProductEncoder {
-  import ScalaReflection.universe._
-  import ScalaReflection.mirror
-  import ScalaReflection.localTypeOf
-  import ScalaReflection.dataTypeFor
-  import ScalaReflection.Schema
-  import ScalaReflection.schemaFor
-  import ScalaReflection.arrayClassFor
-
-  def apply[T <: Product : TypeTag]: ExpressionEncoder[T] = {
-    // We convert the not-serializable TypeTag into StructType and ClassTag.
-    val tpe = typeTag[T].tpe
-    val mirror = typeTag[T].mirror
-    val cls = mirror.runtimeClass(tpe)
-
-    val inputObject = BoundReference(0, ObjectType(cls), nullable = true)
-    val toRowExpression = extractorFor(inputObject, tpe).asInstanceOf[CreateNamedStruct]
-    val fromRowExpression = constructorFor(tpe)
-
-    new ExpressionEncoder[T](
-      toRowExpression.dataType,
-      flat = false,
-      toRowExpression.flatten,
-      fromRowExpression,
-      ClassTag[T](cls))
-  }
-
-  // The Predef.Map is scala.collection.immutable.Map.
-  // Since the map values can be mutable, we explicitly import scala.collection.Map at here.
-  import scala.collection.Map
-
-  def extractorFor(
-      inputObject: Expression,
-      tpe: `Type`): Expression = ScalaReflectionLock.synchronized {
-    if (!inputObject.dataType.isInstanceOf[ObjectType]) {
-      inputObject
-    } else {
-      tpe match {
-        case t if t <:< localTypeOf[Option[_]] =>
-          val TypeRef(_, _, Seq(optType)) = t
-          optType match {
-            // For primitive types we must manually unbox the value of the object.
-            case t if t <:< definitions.IntTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Integer]), inputObject),
-                "intValue",
-                IntegerType)
-            case t if t <:< definitions.LongTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Long]), inputObject),
-                "longValue",
-                LongType)
-            case t if t <:< definitions.DoubleTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Double]), inputObject),
-                "doubleValue",
-                DoubleType)
-            case t if t <:< definitions.FloatTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Float]), inputObject),
-                "floatValue",
-                FloatType)
-            case t if t <:< definitions.ShortTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Short]), inputObject),
-                "shortValue",
-                ShortType)
-            case t if t <:< definitions.ByteTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Byte]), inputObject),
-                "byteValue",
-                ByteType)
-            case t if t <:< definitions.BooleanTpe =>
-              Invoke(
-                UnwrapOption(ObjectType(classOf[java.lang.Boolean]), inputObject),
-                "booleanValue",
-                BooleanType)
-
-            // For non-primitives, we can just extract the object from the Option and then recurse.
-            case other =>
-              val className: String = optType.erasure.typeSymbol.asClass.fullName
-              val classObj = Utils.classForName(className)
-              val optionObjectType = ObjectType(classObj)
-
-              val unwrapped = UnwrapOption(optionObjectType, inputObject)
-              expressions.If(
-                IsNull(unwrapped),
-                expressions.Literal.create(null, schemaFor(optType).dataType),
-                extractorFor(unwrapped, optType))
-          }
-
-        case t if t <:< localTypeOf[Product] =>
-          val formalTypeArgs = t.typeSymbol.asClass.typeParams
-          val TypeRef(_, _, actualTypeArgs) = t
-          val constructorSymbol = t.member(nme.CONSTRUCTOR)
-          val params = if (constructorSymbol.isMethod) {
-            constructorSymbol.asMethod.paramss
-          } else {
-            // Find the primary constructor, and use its parameter ordering.
-            val primaryConstructorSymbol: Option[Symbol] =
-              constructorSymbol.asTerm.alternatives.find(s =>
-                s.isMethod && s.asMethod.isPrimaryConstructor)
-
-            if (primaryConstructorSymbol.isEmpty) {
-              sys.error("Internal SQL error: Product object did not have a primary constructor.")
-            } else {
-              primaryConstructorSymbol.get.asMethod.paramss
-            }
-          }
-
-          CreateNamedStruct(params.head.flatMap { p =>
-            val fieldName = p.name.toString
-            val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
-            val fieldValue = Invoke(inputObject, fieldName, dataTypeFor(fieldType))
-            expressions.Literal(fieldName) :: extractorFor(fieldValue, fieldType) :: Nil
-          })
-
-        case t if t <:< localTypeOf[Array[_]] =>
-          val TypeRef(_, _, Seq(elementType)) = t
-          toCatalystArray(inputObject, elementType)
-
-        case t if t <:< localTypeOf[Seq[_]] =>
-          val TypeRef(_, _, Seq(elementType)) = t
-          toCatalystArray(inputObject, elementType)
-
-        case t if t <:< localTypeOf[Map[_, _]] =>
-          val TypeRef(_, _, Seq(keyType, valueType)) = t
-
-          val keys =
-            Invoke(
-              Invoke(inputObject, "keysIterator",
-                ObjectType(classOf[scala.collection.Iterator[_]])),
-              "toSeq",
-              ObjectType(classOf[scala.collection.Seq[_]]))
-          val convertedKeys = toCatalystArray(keys, keyType)
-
-          val values =
-            Invoke(
-              Invoke(inputObject, "valuesIterator",
-                ObjectType(classOf[scala.collection.Iterator[_]])),
-              "toSeq",
-              ObjectType(classOf[scala.collection.Seq[_]]))
-          val convertedValues = toCatalystArray(values, valueType)
-
-          val Schema(keyDataType, _) = schemaFor(keyType)
-          val Schema(valueDataType, valueNullable) = schemaFor(valueType)
-          NewInstance(
-            classOf[ArrayBasedMapData],
-            convertedKeys :: convertedValues :: Nil,
-            dataType = MapType(keyDataType, valueDataType, valueNullable))
-
-        case t if t <:< localTypeOf[String] =>
-          StaticInvoke(
-            classOf[UTF8String],
-            StringType,
-            "fromString",
-            inputObject :: Nil)
-
-        case t if t <:< localTypeOf[java.sql.Timestamp] =>
-          StaticInvoke(
-            DateTimeUtils,
-            TimestampType,
-            "fromJavaTimestamp",
-            inputObject :: Nil)
-
-        case t if t <:< localTypeOf[java.sql.Date] =>
-          StaticInvoke(
-            DateTimeUtils,
-            DateType,
-            "fromJavaDate",
-            inputObject :: Nil)
-
-        case t if t <:< localTypeOf[BigDecimal] =>
-          StaticInvoke(
-            Decimal,
-            DecimalType.SYSTEM_DEFAULT,
-            "apply",
-            inputObject :: Nil)
-
-        case t if t <:< localTypeOf[java.math.BigDecimal] =>
-          StaticInvoke(
-            Decimal,
-            DecimalType.SYSTEM_DEFAULT,
-            "apply",
-            inputObject :: Nil)
-
-        case t if t <:< localTypeOf[java.lang.Integer] =>
-          Invoke(inputObject, "intValue", IntegerType)
-        case t if t <:< localTypeOf[java.lang.Long] =>
-          Invoke(inputObject, "longValue", LongType)
-        case t if t <:< localTypeOf[java.lang.Double] =>
-          Invoke(inputObject, "doubleValue", DoubleType)
-        case t if t <:< localTypeOf[java.lang.Float] =>
-          Invoke(inputObject, "floatValue", FloatType)
-        case t if t <:< localTypeOf[java.lang.Short] =>
-          Invoke(inputObject, "shortValue", ShortType)
-        case t if t <:< localTypeOf[java.lang.Byte] =>
-          Invoke(inputObject, "byteValue", ByteType)
-        case t if t <:< localTypeOf[java.lang.Boolean] =>
-          Invoke(inputObject, "booleanValue", BooleanType)
-
-        case other =>
-          throw new UnsupportedOperationException(s"Encoder for type $other is not supported")
-      }
-    }
-  }
-
-  private def toCatalystArray(input: Expression, elementType: `Type`): Expression = {
-    val externalDataType = dataTypeFor(elementType)
-    val Schema(catalystType, nullable) = schemaFor(elementType)
-    if (RowEncoder.isNativeType(catalystType)) {
-      NewInstance(
-        classOf[GenericArrayData],
-        input :: Nil,
-        dataType = ArrayType(catalystType, nullable))
-    } else {
-      MapObjects(extractorFor(_, elementType), input, externalDataType)
-    }
-  }
-
-  def constructorFor(
-      tpe: `Type`,
-      path: Option[Expression] = None): Expression = ScalaReflectionLock.synchronized {
-
-    /** Returns the current path with a sub-field extracted. */
-    def addToPath(part: String): Expression = path
-      .map(p => UnresolvedExtractValue(p, expressions.Literal(part)))
-      .getOrElse(UnresolvedAttribute(part))
-
-    /** Returns the current path with a field at ordinal extracted. */
-    def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression = path
-      .map(p => GetInternalRowField(p, ordinal, dataType))
-      .getOrElse(BoundReference(ordinal, dataType, false))
-
-    /** Returns the current path or `BoundReference`. */
-    def getPath: Expression = path.getOrElse(BoundReference(0, schemaFor(tpe).dataType, true))
-
-    tpe match {
-      case t if !dataTypeFor(t).isInstanceOf[ObjectType] => getPath
-
-      case t if t <:< localTypeOf[Option[_]] =>
-        val TypeRef(_, _, Seq(optType)) = t
-        WrapOption(null, constructorFor(optType, path))
-
-      case t if t <:< localTypeOf[java.lang.Integer] =>
-        val boxedType = classOf[java.lang.Integer]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Long] =>
-        val boxedType = classOf[java.lang.Long]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Double] =>
-        val boxedType = classOf[java.lang.Double]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Float] =>
-        val boxedType = classOf[java.lang.Float]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Short] =>
-        val boxedType = classOf[java.lang.Short]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Byte] =>
-        val boxedType = classOf[java.lang.Byte]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.lang.Boolean] =>
-        val boxedType = classOf[java.lang.Boolean]
-        val objectType = ObjectType(boxedType)
-        NewInstance(boxedType, getPath :: Nil, propagateNull = true, objectType)
-
-      case t if t <:< localTypeOf[java.sql.Date] =>
-        StaticInvoke(
-          DateTimeUtils,
-          ObjectType(classOf[java.sql.Date]),
-          "toJavaDate",
-          getPath :: Nil,
-          propagateNull = true)
-
-      case t if t <:< localTypeOf[java.sql.Timestamp] =>
-        StaticInvoke(
-          DateTimeUtils,
-          ObjectType(classOf[java.sql.Timestamp]),
-          "toJavaTimestamp",
-          getPath :: Nil,
-          propagateNull = true)
-
-      case t if t <:< localTypeOf[java.lang.String] =>
-        Invoke(getPath, "toString", ObjectType(classOf[String]))
-
-      case t if t <:< localTypeOf[java.math.BigDecimal] =>
-        Invoke(getPath, "toJavaBigDecimal", ObjectType(classOf[java.math.BigDecimal]))
-
-      case t if t <:< localTypeOf[BigDecimal] =>
-        Invoke(getPath, "toBigDecimal", ObjectType(classOf[BigDecimal]))
-
-      case t if t <:< localTypeOf[Array[_]] =>
-        val TypeRef(_, _, Seq(elementType)) = t
-        val primitiveMethod = elementType match {
-          case t if t <:< definitions.IntTpe => Some("toIntArray")
-          case t if t <:< definitions.LongTpe => Some("toLongArray")
-          case t if t <:< definitions.DoubleTpe => Some("toDoubleArray")
-          case t if t <:< definitions.FloatTpe => Some("toFloatArray")
-          case t if t <:< definitions.ShortTpe => Some("toShortArray")
-          case t if t <:< definitions.ByteTpe => Some("toByteArray")
-          case t if t <:< definitions.BooleanTpe => Some("toBooleanArray")
-          case _ => None
-        }
-
-        primitiveMethod.map { method =>
-          Invoke(getPath, method, arrayClassFor(elementType))
-        }.getOrElse {
-          Invoke(
-            MapObjects(
-              p => constructorFor(elementType, Some(p)),
-              getPath,
-              schemaFor(elementType).dataType),
-            "array",
-            arrayClassFor(elementType))
-        }
-
-      case t if t <:< localTypeOf[Seq[_]] =>
-        val TypeRef(_, _, Seq(elementType)) = t
-        val arrayData =
-          Invoke(
-            MapObjects(
-              p => constructorFor(elementType, Some(p)),
-              getPath,
-              schemaFor(elementType).dataType),
-            "array",
-            ObjectType(classOf[Array[Any]]))
-
-        StaticInvoke(
-          scala.collection.mutable.WrappedArray,
-          ObjectType(classOf[Seq[_]]),
-          "make",
-          arrayData :: Nil)
-
-      case t if t <:< localTypeOf[Map[_, _]] =>
-        val TypeRef(_, _, Seq(keyType, valueType)) = t
-
-        val keyData =
-          Invoke(
-            MapObjects(
-              p => constructorFor(keyType, Some(p)),
-              Invoke(getPath, "keyArray", ArrayType(schemaFor(keyType).dataType)),
-              schemaFor(keyType).dataType),
-            "array",
-            ObjectType(classOf[Array[Any]]))
-
-        val valueData =
-          Invoke(
-            MapObjects(
-              p => constructorFor(valueType, Some(p)),
-              Invoke(getPath, "valueArray", ArrayType(schemaFor(valueType).dataType)),
-              schemaFor(valueType).dataType),
-            "array",
-            ObjectType(classOf[Array[Any]]))
-
-        StaticInvoke(
-          ArrayBasedMapData,
-          ObjectType(classOf[Map[_, _]]),
-          "toScalaMap",
-          keyData :: valueData :: Nil)
-
-      case t if t <:< localTypeOf[Product] =>
-        val formalTypeArgs = t.typeSymbol.asClass.typeParams
-        val TypeRef(_, _, actualTypeArgs) = t
-        val constructorSymbol = t.member(nme.CONSTRUCTOR)
-        val params = if (constructorSymbol.isMethod) {
-          constructorSymbol.asMethod.paramss
-        } else {
-          // Find the primary constructor, and use its parameter ordering.
-          val primaryConstructorSymbol: Option[Symbol] =
-            constructorSymbol.asTerm.alternatives.find(s =>
-              s.isMethod && s.asMethod.isPrimaryConstructor)
-
-          if (primaryConstructorSymbol.isEmpty) {
-            sys.error("Internal SQL error: Product object did not have a primary constructor.")
-          } else {
-            primaryConstructorSymbol.get.asMethod.paramss
-          }
-        }
-
-        val cls = mirror.runtimeClass(tpe.erasure.typeSymbol.asClass)
-
-        val arguments = params.head.zipWithIndex.map { case (p, i) =>
-          val fieldName = p.name.toString
-          val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
-          val dataType = schemaFor(fieldType).dataType
-
-          // For tuples, we based grab the inner fields by ordinal instead of name.
-          if (cls.getName startsWith "scala.Tuple") {
-            constructorFor(fieldType, Some(addToPathOrdinal(i, dataType)))
-          } else {
-            constructorFor(fieldType, Some(addToPath(fieldName)))
-          }
-        }
-
-        val newInstance = NewInstance(cls, arguments, propagateNull = false, ObjectType(cls))
-
-        if (path.nonEmpty) {
-          expressions.If(
-            IsNull(getPath),
-            expressions.Literal.create(null, ObjectType(cls)),
-            newInstance
-          )
-        } else {
-          newInstance
-        }
-    }
-  }
-}
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index 9bb1602494b6..4cda4824acdc 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -23,6 +23,7 @@ import scala.reflect.ClassTag
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.util.{GenericArrayData, ArrayBasedMapData, DateTimeUtils}
+import org.apache.spark.sql.catalyst.ScalaReflection
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
@@ -132,17 +133,8 @@ object RowEncoder {
       CreateStruct(convertedFields)
   }
 
-  /**
-   * Returns true if the value of this data type is same between internal and external.
-   */
-  def isNativeType(dt: DataType): Boolean = dt match {
-    case BooleanType | ByteType | ShortType | IntegerType | LongType |
-         FloatType | DoubleType | BinaryType => true
-    case _ => false
-  }
-
   private def externalDataTypeFor(dt: DataType): DataType = dt match {
-    case _ if isNativeType(dt) => dt
+    case _ if ScalaReflection.isNativeType(dt) => dt
     case TimestampType => ObjectType(classOf[java.sql.Timestamp])
     case DateType => ObjectType(classOf[java.sql.Date])
     case _: DecimalType => ObjectType(classOf[java.math.BigDecimal])
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index f865a9408ef4..ef7399e0196a 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -24,7 +24,6 @@ import org.apache.spark.SparkConf
 import org.apache.spark.serializer._
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.analysis.SimpleAnalyzer
-import org.apache.spark.sql.catalyst.encoders.ProductEncoder
 import org.apache.spark.sql.catalyst.plans.logical.{Project, LocalRelation}
 import org.apache.spark.sql.catalyst.util.GenericArrayData
 import org.apache.spark.sql.catalyst.InternalRow
@@ -300,10 +299,9 @@ case class UnwrapOption(
 /**
  * Converts the result of evaluating `child` into an option, checking both the isNull bit and
  * (in the case of reference types) equality with null.
- * @param optionType The datatype to be held inside of the Option.
  * @param child The expression to evaluate and wrap.
  */
-case class WrapOption(optionType: DataType, child: Expression)
+case class WrapOption(child: Expression)
   extends UnaryExpression with ExpectsInputTypes {
 
   override def dataType: DataType = ObjectType(classOf[Option[_]])
@@ -316,14 +314,13 @@ case class WrapOption(optionType: DataType, child: Expression)
     throw new UnsupportedOperationException("Only code-generated evaluation is supported")
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val javaType = ctx.javaType(optionType)
     val inputObject = child.gen(ctx)
 
     s"""
       ${inputObject.code}
 
       boolean ${ev.isNull} = false;
-      scala.Option<$javaType> ${ev.value} =
+      scala.Option ${ev.value} =
         ${inputObject.isNull} ?
         scala.Option$$.MODULE$$.apply(null) : new scala.Some(${inputObject.value});
     """
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
index 4ea410d492b0..c2aace1ef238 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ScalaReflectionSuite.scala
@@ -186,74 +186,6 @@ class ScalaReflectionSuite extends SparkFunSuite {
       nullable = true))
   }
 
-  test("get data type of a value") {
-    // BooleanType
-    assert(BooleanType === typeOfObject(true))
-    assert(BooleanType === typeOfObject(false))
-
-    // BinaryType
-    assert(BinaryType === typeOfObject("string".getBytes))
-
-    // StringType
-    assert(StringType === typeOfObject("string"))
-
-    // ByteType
-    assert(ByteType === typeOfObject(127.toByte))
-
-    // ShortType
-    assert(ShortType === typeOfObject(32767.toShort))
-
-    // IntegerType
-    assert(IntegerType === typeOfObject(2147483647))
-
-    // LongType
-    assert(LongType === typeOfObject(9223372036854775807L))
-
-    // FloatType
-    assert(FloatType === typeOfObject(3.4028235E38.toFloat))
-
-    // DoubleType
-    assert(DoubleType === typeOfObject(1.7976931348623157E308))
-
-    // DecimalType
-    assert(DecimalType.SYSTEM_DEFAULT ===
-      typeOfObject(new java.math.BigDecimal("1.7976931348623157E318")))
-
-    // DateType
-    assert(DateType === typeOfObject(Date.valueOf("2014-07-25")))
-
-    // TimestampType
-    assert(TimestampType === typeOfObject(Timestamp.valueOf("2014-07-25 10:26:00")))
-
-    // NullType
-    assert(NullType === typeOfObject(null))
-
-    def typeOfObject1: PartialFunction[Any, DataType] = typeOfObject orElse {
-      case value: java.math.BigInteger => DecimalType.SYSTEM_DEFAULT
-      case value: java.math.BigDecimal => DecimalType.SYSTEM_DEFAULT
-      case _ => StringType
-    }
-
-    assert(DecimalType.SYSTEM_DEFAULT === typeOfObject1(
-      new BigInteger("92233720368547758070")))
-    assert(DecimalType.SYSTEM_DEFAULT === typeOfObject1(
-      new java.math.BigDecimal("1.7976931348623157E318")))
-    assert(StringType === typeOfObject1(BigInt("92233720368547758070")))
-
-    def typeOfObject2: PartialFunction[Any, DataType] = typeOfObject orElse {
-      case value: java.math.BigInteger => DecimalType.SYSTEM_DEFAULT
-    }
-
-    intercept[MatchError](typeOfObject2(BigInt("92233720368547758070")))
-
-    def typeOfObject3: PartialFunction[Any, DataType] = typeOfObject orElse {
-      case c: Seq[_] => ArrayType(typeOfObject3(c.head))
-    }
-
-    assert(ArrayType(IntegerType) === typeOfObject3(Seq(1, 2, 3)))
-    assert(ArrayType(ArrayType(IntegerType)) === typeOfObject3(Seq(Seq(1, 2, 3))))
-  }
-
   test("convert PrimitiveData to catalyst") {
     val data = PrimitiveData(1, 1, 1, 1, 1, 1, true)
     val convertedData = InternalRow(1, 1.toLong, 1.toDouble, 1.toFloat, 1.toShort, 1.toByte, true)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index cde0364f3dd9..76459b34a484 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -17,24 +17,234 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+import java.sql.{Timestamp, Date}
 import java.util.Arrays
 import java.util.concurrent.ConcurrentMap
+import scala.collection.mutable.ArrayBuffer
+import scala.reflect.runtime.universe.TypeTag
 
 import com.google.common.collect.MapMaker
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.sql.Encoders
 import org.apache.spark.sql.catalyst.expressions.AttributeReference
 import org.apache.spark.sql.catalyst.util.ArrayData
+import org.apache.spark.sql.catalyst.{OptionalData, PrimitiveData}
 import org.apache.spark.sql.types.ArrayType
 
-abstract class ExpressionEncoderSuite extends SparkFunSuite {
-  val outers: ConcurrentMap[String, AnyRef] = new MapMaker().weakValues().makeMap()
+case class RepeatedStruct(s: Seq[PrimitiveData])
 
-  protected def encodeDecodeTest[T](
+case class NestedArray(a: Array[Array[Int]]) {
+  override def equals(other: Any): Boolean = other match {
+    case NestedArray(otherArray) =>
+      java.util.Arrays.deepEquals(
+        a.asInstanceOf[Array[AnyRef]],
+        otherArray.asInstanceOf[Array[AnyRef]])
+    case _ => false
+  }
+}
+
+case class BoxedData(
+    intField: java.lang.Integer,
+    longField: java.lang.Long,
+    doubleField: java.lang.Double,
+    floatField: java.lang.Float,
+    shortField: java.lang.Short,
+    byteField: java.lang.Byte,
+    booleanField: java.lang.Boolean)
+
+case class RepeatedData(
+    arrayField: Seq[Int],
+    arrayFieldContainsNull: Seq[java.lang.Integer],
+    mapField: scala.collection.Map[Int, Long],
+    mapFieldNull: scala.collection.Map[Int, java.lang.Long],
+    structField: PrimitiveData)
+
+case class SpecificCollection(l: List[Int])
+
+/** For testing Kryo serialization based encoder. */
+class KryoSerializable(val value: Int) {
+  override def equals(other: Any): Boolean = {
+    this.value == other.asInstanceOf[KryoSerializable].value
+  }
+}
+
+/** For testing Java serialization based encoder. */
+class JavaSerializable(val value: Int) extends Serializable {
+  override def equals(other: Any): Boolean = {
+    this.value == other.asInstanceOf[JavaSerializable].value
+  }
+}
+
+class ExpressionEncoderSuite extends SparkFunSuite {
+  implicit def encoder[T : TypeTag]: ExpressionEncoder[T] = ExpressionEncoder()
+
+  // test flat encoders
+  encodeDecodeTest(false, "primitive boolean")
+  encodeDecodeTest(-3.toByte, "primitive byte")
+  encodeDecodeTest(-3.toShort, "primitive short")
+  encodeDecodeTest(-3, "primitive int")
+  encodeDecodeTest(-3L, "primitive long")
+  encodeDecodeTest(-3.7f, "primitive float")
+  encodeDecodeTest(-3.7, "primitive double")
+
+  encodeDecodeTest(new java.lang.Boolean(false), "boxed boolean")
+  encodeDecodeTest(new java.lang.Byte(-3.toByte), "boxed byte")
+  encodeDecodeTest(new java.lang.Short(-3.toShort), "boxed short")
+  encodeDecodeTest(new java.lang.Integer(-3), "boxed int")
+  encodeDecodeTest(new java.lang.Long(-3L), "boxed long")
+  encodeDecodeTest(new java.lang.Float(-3.7f), "boxed float")
+  encodeDecodeTest(new java.lang.Double(-3.7), "boxed double")
+
+  encodeDecodeTest(BigDecimal("32131413.211321313"), "scala decimal")
+  // encodeDecodeTest(new java.math.BigDecimal("231341.23123"), "java decimal")
+
+  encodeDecodeTest("hello", "string")
+  encodeDecodeTest(Date.valueOf("2012-12-23"), "date")
+  encodeDecodeTest(Timestamp.valueOf("2016-01-29 10:00:00"), "timestamp")
+  encodeDecodeTest(Array[Byte](13, 21, -23), "binary")
+
+  encodeDecodeTest(Seq(31, -123, 4), "seq of int")
+  encodeDecodeTest(Seq("abc", "xyz"), "seq of string")
+  encodeDecodeTest(Seq("abc", null, "xyz"), "seq of string with null")
+  encodeDecodeTest(Seq.empty[Int], "empty seq of int")
+  encodeDecodeTest(Seq.empty[String], "empty seq of string")
+
+  encodeDecodeTest(Seq(Seq(31, -123), null, Seq(4, 67)), "seq of seq of int")
+  encodeDecodeTest(Seq(Seq("abc", "xyz"), Seq[String](null), null, Seq("1", null, "2")),
+    "seq of seq of string")
+
+  encodeDecodeTest(Array(31, -123, 4), "array of int")
+  encodeDecodeTest(Array("abc", "xyz"), "array of string")
+  encodeDecodeTest(Array("a", null, "x"), "array of string with null")
+  encodeDecodeTest(Array.empty[Int], "empty array of int")
+  encodeDecodeTest(Array.empty[String], "empty array of string")
+
+  encodeDecodeTest(Array(Array(31, -123), null, Array(4, 67)), "array of array of int")
+  encodeDecodeTest(Array(Array("abc", "xyz"), Array[String](null), null, Array("1", null, "2")),
+    "array of array of string")
+
+  encodeDecodeTest(Map(1 -> "a", 2 -> "b"), "map")
+  encodeDecodeTest(Map(1 -> "a", 2 -> null), "map with null")
+  encodeDecodeTest(Map(1 -> Map("a" -> 1), 2 -> Map("b" -> 2)), "map of map")
+
+  // Kryo encoders
+  encodeDecodeTest("hello", "kryo string")(encoderFor(Encoders.kryo[String]))
+  encodeDecodeTest(new KryoSerializable(15), "kryo object")(
+    encoderFor(Encoders.kryo[KryoSerializable]))
+
+  // Java encoders
+  encodeDecodeTest("hello", "java string")(encoderFor(Encoders.javaSerialization[String]))
+  encodeDecodeTest(new JavaSerializable(15), "java object")(
+    encoderFor(Encoders.javaSerialization[JavaSerializable]))
+
+  // test product encoders
+  private def productTest[T <: Product : ExpressionEncoder](input: T): Unit = {
+    encodeDecodeTest(input, input.getClass.getSimpleName)
+  }
+
+  case class InnerClass(i: Int)
+  productTest(InnerClass(1))
+
+  productTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
+
+  productTest(
+    OptionalData(Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
+      Some(PrimitiveData(1, 1, 1, 1, 1, 1, true))))
+
+  productTest(OptionalData(None, None, None, None, None, None, None, None))
+
+  productTest(BoxedData(1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true))
+
+  productTest(BoxedData(null, null, null, null, null, null, null))
+
+  productTest(RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil))
+
+  productTest((1, "test", PrimitiveData(1, 1, 1, 1, 1, 1, true)))
+
+  productTest(
+    RepeatedData(
+      Seq(1, 2),
+      Seq(new Integer(1), null, new Integer(2)),
+      Map(1 -> 2L),
+      Map(1 -> null),
+      PrimitiveData(1, 1, 1, 1, 1, 1, true)))
+
+  productTest(NestedArray(Array(Array(1, -2, 3), null, Array(4, 5, -6))))
+
+  productTest(("Seq[(String, String)]",
+    Seq(("a", "b"))))
+  productTest(("Seq[(Int, Int)]",
+    Seq((1, 2))))
+  productTest(("Seq[(Long, Long)]",
+    Seq((1L, 2L))))
+  productTest(("Seq[(Float, Float)]",
+    Seq((1.toFloat, 2.toFloat))))
+  productTest(("Seq[(Double, Double)]",
+    Seq((1.toDouble, 2.toDouble))))
+  productTest(("Seq[(Short, Short)]",
+    Seq((1.toShort, 2.toShort))))
+  productTest(("Seq[(Byte, Byte)]",
+    Seq((1.toByte, 2.toByte))))
+  productTest(("Seq[(Boolean, Boolean)]",
+    Seq((true, false))))
+
+  productTest(("ArrayBuffer[(String, String)]",
+    ArrayBuffer(("a", "b"))))
+  productTest(("ArrayBuffer[(Int, Int)]",
+    ArrayBuffer((1, 2))))
+  productTest(("ArrayBuffer[(Long, Long)]",
+    ArrayBuffer((1L, 2L))))
+  productTest(("ArrayBuffer[(Float, Float)]",
+    ArrayBuffer((1.toFloat, 2.toFloat))))
+  productTest(("ArrayBuffer[(Double, Double)]",
+    ArrayBuffer((1.toDouble, 2.toDouble))))
+  productTest(("ArrayBuffer[(Short, Short)]",
+    ArrayBuffer((1.toShort, 2.toShort))))
+  productTest(("ArrayBuffer[(Byte, Byte)]",
+    ArrayBuffer((1.toByte, 2.toByte))))
+  productTest(("ArrayBuffer[(Boolean, Boolean)]",
+    ArrayBuffer((true, false))))
+
+  productTest(("Seq[Seq[(Int, Int)]]",
+    Seq(Seq((1, 2)))))
+
+  // test for ExpressionEncoder.tuple
+  encodeDecodeTest(
+    1 -> 10L,
+    "tuple with 2 flat encoders")(
+    ExpressionEncoder.tuple(ExpressionEncoder[Int], ExpressionEncoder[Long]))
+
+  encodeDecodeTest(
+    (PrimitiveData(1, 1, 1, 1, 1, 1, true), (3, 30L)),
+    "tuple with 2 product encoders")(
+    ExpressionEncoder.tuple(ExpressionEncoder[PrimitiveData], ExpressionEncoder[(Int, Long)]))
+
+  encodeDecodeTest(
+    (PrimitiveData(1, 1, 1, 1, 1, 1, true), 3),
+    "tuple with flat encoder and product encoder")(
+    ExpressionEncoder.tuple(ExpressionEncoder[PrimitiveData], ExpressionEncoder[Int]))
+
+  encodeDecodeTest(
+    (3, PrimitiveData(1, 1, 1, 1, 1, 1, true)),
+    "tuple with product encoder and flat encoder")(
+    ExpressionEncoder.tuple(ExpressionEncoder[Int], ExpressionEncoder[PrimitiveData]))
+
+  encodeDecodeTest(
+    (1, (10, 100L)),
+    "nested tuple encoder") {
+    val intEnc = ExpressionEncoder[Int]
+    val longEnc = ExpressionEncoder[Long]
+    ExpressionEncoder.tuple(intEnc, ExpressionEncoder.tuple(intEnc, longEnc))
+  }
+
+  private val outers: ConcurrentMap[String, AnyRef] = new MapMaker().weakValues().makeMap()
+  outers.put(getClass.getName, this)
+  private def encodeDecodeTest[T : ExpressionEncoder](
       input: T,
-      encoder: ExpressionEncoder[T],
       testName: String): Unit = {
     test(s"encode/decode for $testName: $input") {
+      val encoder = implicitly[ExpressionEncoder[T]]
       val row = encoder.toRow(input)
       val schema = encoder.schema.toAttributes
       val boundEncoder = encoder.resolve(schema, outers).bind(schema)
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
deleted file mode 100644
index 07523d49f426..000000000000
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/FlatEncoderSuite.scala
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import java.sql.{Date, Timestamp}
-import org.apache.spark.sql.Encoders
-
-class FlatEncoderSuite extends ExpressionEncoderSuite {
-  encodeDecodeTest(false, FlatEncoder[Boolean], "primitive boolean")
-  encodeDecodeTest(-3.toByte, FlatEncoder[Byte], "primitive byte")
-  encodeDecodeTest(-3.toShort, FlatEncoder[Short], "primitive short")
-  encodeDecodeTest(-3, FlatEncoder[Int], "primitive int")
-  encodeDecodeTest(-3L, FlatEncoder[Long], "primitive long")
-  encodeDecodeTest(-3.7f, FlatEncoder[Float], "primitive float")
-  encodeDecodeTest(-3.7, FlatEncoder[Double], "primitive double")
-
-  encodeDecodeTest(new java.lang.Boolean(false), FlatEncoder[java.lang.Boolean], "boxed boolean")
-  encodeDecodeTest(new java.lang.Byte(-3.toByte), FlatEncoder[java.lang.Byte], "boxed byte")
-  encodeDecodeTest(new java.lang.Short(-3.toShort), FlatEncoder[java.lang.Short], "boxed short")
-  encodeDecodeTest(new java.lang.Integer(-3), FlatEncoder[java.lang.Integer], "boxed int")
-  encodeDecodeTest(new java.lang.Long(-3L), FlatEncoder[java.lang.Long], "boxed long")
-  encodeDecodeTest(new java.lang.Float(-3.7f), FlatEncoder[java.lang.Float], "boxed float")
-  encodeDecodeTest(new java.lang.Double(-3.7), FlatEncoder[java.lang.Double], "boxed double")
-
-  encodeDecodeTest(BigDecimal("32131413.211321313"), FlatEncoder[BigDecimal], "scala decimal")
-  type JDecimal = java.math.BigDecimal
-  // encodeDecodeTest(new JDecimal("231341.23123"), FlatEncoder[JDecimal], "java decimal")
-
-  encodeDecodeTest("hello", FlatEncoder[String], "string")
-  encodeDecodeTest(Date.valueOf("2012-12-23"), FlatEncoder[Date], "date")
-  encodeDecodeTest(Timestamp.valueOf("2016-01-29 10:00:00"), FlatEncoder[Timestamp], "timestamp")
-  encodeDecodeTest(Array[Byte](13, 21, -23), FlatEncoder[Array[Byte]], "binary")
-
-  encodeDecodeTest(Seq(31, -123, 4), FlatEncoder[Seq[Int]], "seq of int")
-  encodeDecodeTest(Seq("abc", "xyz"), FlatEncoder[Seq[String]], "seq of string")
-  encodeDecodeTest(Seq("abc", null, "xyz"), FlatEncoder[Seq[String]], "seq of string with null")
-  encodeDecodeTest(Seq.empty[Int], FlatEncoder[Seq[Int]], "empty seq of int")
-  encodeDecodeTest(Seq.empty[String], FlatEncoder[Seq[String]], "empty seq of string")
-
-  encodeDecodeTest(Seq(Seq(31, -123), null, Seq(4, 67)),
-    FlatEncoder[Seq[Seq[Int]]], "seq of seq of int")
-  encodeDecodeTest(Seq(Seq("abc", "xyz"), Seq[String](null), null, Seq("1", null, "2")),
-    FlatEncoder[Seq[Seq[String]]], "seq of seq of string")
-
-  encodeDecodeTest(Array(31, -123, 4), FlatEncoder[Array[Int]], "array of int")
-  encodeDecodeTest(Array("abc", "xyz"), FlatEncoder[Array[String]], "array of string")
-  encodeDecodeTest(Array("a", null, "x"), FlatEncoder[Array[String]], "array of string with null")
-  encodeDecodeTest(Array.empty[Int], FlatEncoder[Array[Int]], "empty array of int")
-  encodeDecodeTest(Array.empty[String], FlatEncoder[Array[String]], "empty array of string")
-
-  encodeDecodeTest(Array(Array(31, -123), null, Array(4, 67)),
-    FlatEncoder[Array[Array[Int]]], "array of array of int")
-  encodeDecodeTest(Array(Array("abc", "xyz"), Array[String](null), null, Array("1", null, "2")),
-    FlatEncoder[Array[Array[String]]], "array of array of string")
-
-  encodeDecodeTest(Map(1 -> "a", 2 -> "b"), FlatEncoder[Map[Int, String]], "map")
-  encodeDecodeTest(Map(1 -> "a", 2 -> null), FlatEncoder[Map[Int, String]], "map with null")
-  encodeDecodeTest(Map(1 -> Map("a" -> 1), 2 -> Map("b" -> 2)),
-    FlatEncoder[Map[Int, Map[String, Int]]], "map of map")
-
-  // Kryo encoders
-  encodeDecodeTest("hello", encoderFor(Encoders.kryo[String]), "kryo string")
-  encodeDecodeTest(new KryoSerializable(15),
-    encoderFor(Encoders.kryo[KryoSerializable]), "kryo object")
-
-  // Java encoders
-  encodeDecodeTest("hello", encoderFor(Encoders.javaSerialization[String]), "java string")
-  encodeDecodeTest(new JavaSerializable(15),
-    encoderFor(Encoders.javaSerialization[JavaSerializable]), "java object")
-}
-
-/** For testing Kryo serialization based encoder. */
-class KryoSerializable(val value: Int) {
-  override def equals(other: Any): Boolean = {
-    this.value == other.asInstanceOf[KryoSerializable].value
-  }
-}
-
-/** For testing Java serialization based encoder. */
-class JavaSerializable(val value: Int) extends Serializable {
-  override def equals(other: Any): Boolean = {
-    this.value == other.asInstanceOf[JavaSerializable].value
-  }
-}
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
deleted file mode 100644
index 1798514c5c38..000000000000
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ProductEncoderSuite.scala
+++ /dev/null
@@ -1,156 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.sql.catalyst.encoders
-
-import scala.collection.mutable.ArrayBuffer
-import scala.reflect.runtime.universe.TypeTag
-
-import org.apache.spark.sql.catalyst.{OptionalData, PrimitiveData}
-
-case class RepeatedStruct(s: Seq[PrimitiveData])
-
-case class NestedArray(a: Array[Array[Int]]) {
-  override def equals(other: Any): Boolean = other match {
-    case NestedArray(otherArray) =>
-      java.util.Arrays.deepEquals(
-        a.asInstanceOf[Array[AnyRef]],
-        otherArray.asInstanceOf[Array[AnyRef]])
-    case _ => false
-  }
-}
-
-case class BoxedData(
-    intField: java.lang.Integer,
-    longField: java.lang.Long,
-    doubleField: java.lang.Double,
-    floatField: java.lang.Float,
-    shortField: java.lang.Short,
-    byteField: java.lang.Byte,
-    booleanField: java.lang.Boolean)
-
-case class RepeatedData(
-    arrayField: Seq[Int],
-    arrayFieldContainsNull: Seq[java.lang.Integer],
-    mapField: scala.collection.Map[Int, Long],
-    mapFieldNull: scala.collection.Map[Int, java.lang.Long],
-    structField: PrimitiveData)
-
-case class SpecificCollection(l: List[Int])
-
-class ProductEncoderSuite extends ExpressionEncoderSuite {
-  outers.put(getClass.getName, this)
-
-  case class InnerClass(i: Int)
-  productTest(InnerClass(1))
-
-  productTest(PrimitiveData(1, 1, 1, 1, 1, 1, true))
-
-  productTest(
-    OptionalData(Some(2), Some(2), Some(2), Some(2), Some(2), Some(2), Some(true),
-      Some(PrimitiveData(1, 1, 1, 1, 1, 1, true))))
-
-  productTest(OptionalData(None, None, None, None, None, None, None, None))
-
-  productTest(BoxedData(1, 1L, 1.0, 1.0f, 1.toShort, 1.toByte, true))
-
-  productTest(BoxedData(null, null, null, null, null, null, null))
-
-  productTest(RepeatedStruct(PrimitiveData(1, 1, 1, 1, 1, 1, true) :: Nil))
-
-  productTest((1, "test", PrimitiveData(1, 1, 1, 1, 1, 1, true)))
-
-  productTest(
-    RepeatedData(
-      Seq(1, 2),
-      Seq(new Integer(1), null, new Integer(2)),
-      Map(1 -> 2L),
-      Map(1 -> null),
-      PrimitiveData(1, 1, 1, 1, 1, 1, true)))
-
-  productTest(NestedArray(Array(Array(1, -2, 3), null, Array(4, 5, -6))))
-
-  productTest(("Seq[(String, String)]",
-    Seq(("a", "b"))))
-  productTest(("Seq[(Int, Int)]",
-    Seq((1, 2))))
-  productTest(("Seq[(Long, Long)]",
-    Seq((1L, 2L))))
-  productTest(("Seq[(Float, Float)]",
-    Seq((1.toFloat, 2.toFloat))))
-  productTest(("Seq[(Double, Double)]",
-    Seq((1.toDouble, 2.toDouble))))
-  productTest(("Seq[(Short, Short)]",
-    Seq((1.toShort, 2.toShort))))
-  productTest(("Seq[(Byte, Byte)]",
-    Seq((1.toByte, 2.toByte))))
-  productTest(("Seq[(Boolean, Boolean)]",
-    Seq((true, false))))
-
-  productTest(("ArrayBuffer[(String, String)]",
-    ArrayBuffer(("a", "b"))))
-  productTest(("ArrayBuffer[(Int, Int)]",
-    ArrayBuffer((1, 2))))
-  productTest(("ArrayBuffer[(Long, Long)]",
-    ArrayBuffer((1L, 2L))))
-  productTest(("ArrayBuffer[(Float, Float)]",
-    ArrayBuffer((1.toFloat, 2.toFloat))))
-  productTest(("ArrayBuffer[(Double, Double)]",
-    ArrayBuffer((1.toDouble, 2.toDouble))))
-  productTest(("ArrayBuffer[(Short, Short)]",
-    ArrayBuffer((1.toShort, 2.toShort))))
-  productTest(("ArrayBuffer[(Byte, Byte)]",
-    ArrayBuffer((1.toByte, 2.toByte))))
-  productTest(("ArrayBuffer[(Boolean, Boolean)]",
-    ArrayBuffer((true, false))))
-
-  productTest(("Seq[Seq[(Int, Int)]]",
-    Seq(Seq((1, 2)))))
-
-  encodeDecodeTest(
-    1 -> 10L,
-    ExpressionEncoder.tuple(FlatEncoder[Int], FlatEncoder[Long]),
-    "tuple with 2 flat encoders")
-
-  encodeDecodeTest(
-    (PrimitiveData(1, 1, 1, 1, 1, 1, true), (3, 30L)),
-    ExpressionEncoder.tuple(ProductEncoder[PrimitiveData], ProductEncoder[(Int, Long)]),
-    "tuple with 2 product encoders")
-
-  encodeDecodeTest(
-    (PrimitiveData(1, 1, 1, 1, 1, 1, true), 3),
-    ExpressionEncoder.tuple(ProductEncoder[PrimitiveData], FlatEncoder[Int]),
-    "tuple with flat encoder and product encoder")
-
-  encodeDecodeTest(
-    (3, PrimitiveData(1, 1, 1, 1, 1, 1, true)),
-    ExpressionEncoder.tuple(FlatEncoder[Int], ProductEncoder[PrimitiveData]),
-    "tuple with product encoder and flat encoder")
-
-  encodeDecodeTest(
-    (1, (10, 100L)),
-    {
-      val intEnc = FlatEncoder[Int]
-      val longEnc = FlatEncoder[Long]
-      ExpressionEncoder.tuple(intEnc, ExpressionEncoder.tuple(intEnc, longEnc))
-    },
-    "nested tuple encoder")
-
-  private def productTest[T <: Product : TypeTag](input: T): Unit = {
-    encodeDecodeTest(input, ProductEncoder[T], input.getClass.getSimpleName)
-  }
-}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 7e5acbe8517d..6de3dd626576 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -21,7 +21,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.function._
-import org.apache.spark.sql.catalyst.encoders.{FlatEncoder, ExpressionEncoder, encoderFor, OuterScopes}
+import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, OuterScopes}
 import org.apache.spark.sql.catalyst.expressions.{Alias, CreateStruct, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
@@ -242,7 +242,7 @@ class GroupedDataset[K, T] private[sql](
    * Returns a [[Dataset]] that contains a tuple with each key and the number of items present
    * for that key.
    */
-  def count(): Dataset[(K, Long)] = agg(functions.count("*").as(FlatEncoder[Long]))
+  def count(): Dataset[(K, Long)] = agg(functions.count("*").as(ExpressionEncoder[Long]))
 
   /**
    * Applies the given function to each cogrouped data.  For each unique group, the function will
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index 8471eea1b7d9..25ffdcde1771 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -17,10 +17,6 @@
 
 package org.apache.spark.sql
 
-import org.apache.spark.sql.catalyst.encoders._
-import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
-import org.apache.spark.sql.execution.datasources.LogicalRelation
-
 import scala.language.implicitConversions
 import scala.reflect.runtime.universe.TypeTag
 
@@ -28,6 +24,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.types._
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.SpecificMutableRow
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.types.StructField
 import org.apache.spark.unsafe.types.UTF8String
 
@@ -37,16 +34,16 @@ import org.apache.spark.unsafe.types.UTF8String
 abstract class SQLImplicits {
   protected def _sqlContext: SQLContext
 
-  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ProductEncoder[T]
+  implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ExpressionEncoder()
 
-  implicit def newIntEncoder: Encoder[Int] = FlatEncoder[Int]
-  implicit def newLongEncoder: Encoder[Long] = FlatEncoder[Long]
-  implicit def newDoubleEncoder: Encoder[Double] = FlatEncoder[Double]
-  implicit def newFloatEncoder: Encoder[Float] = FlatEncoder[Float]
-  implicit def newByteEncoder: Encoder[Byte] = FlatEncoder[Byte]
-  implicit def newShortEncoder: Encoder[Short] = FlatEncoder[Short]
-  implicit def newBooleanEncoder: Encoder[Boolean] = FlatEncoder[Boolean]
-  implicit def newStringEncoder: Encoder[String] = FlatEncoder[String]
+  implicit def newIntEncoder: Encoder[Int] = ExpressionEncoder()
+  implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder()
+  implicit def newDoubleEncoder: Encoder[Double] = ExpressionEncoder()
+  implicit def newFloatEncoder: Encoder[Float] = ExpressionEncoder()
+  implicit def newByteEncoder: Encoder[Byte] = ExpressionEncoder()
+  implicit def newShortEncoder: Encoder[Short] = ExpressionEncoder()
+  implicit def newBooleanEncoder: Encoder[Boolean] = ExpressionEncoder()
+  implicit def newStringEncoder: Encoder[String] = ExpressionEncoder()
 
   /**
    * Creates a [[Dataset]] from an RDD.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 95158de710ac..b27b1340cce4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -26,7 +26,7 @@ import scala.util.Try
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.sql.catalyst.{SqlParser, ScalaReflection}
 import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, Star}
-import org.apache.spark.sql.catalyst.encoders.FlatEncoder
+import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.BroadcastHint
@@ -267,7 +267,7 @@ object functions extends LegacyFunctions {
    * @since 1.3.0
    */
   def count(columnName: String): TypedColumn[Any, Long] =
-    count(Column(columnName)).as(FlatEncoder[Long])
+    count(Column(columnName)).as(ExpressionEncoder[Long])
 
   /**
    * Aggregate function: returns the number of distinct items in a group.

From 4700074530d9a398843e13f0ef514be97a237cea Mon Sep 17 00:00:00 2001
From: Huaxin Gao <huaxing@oc0558782468.ibm.com>
Date: Thu, 19 Nov 2015 13:08:01 -0800
Subject: [PATCH 802/896] [SPARK-11778][SQL] parse table name before it is
 passed to lookupRelation

Fix a bug in DataFrameReader.table (table with schema name such as "db_name.table" doesn't work)
Use SqlParser.parseTableIdentifier to parse the table name before lookupRelation.

Author: Huaxin Gao <huaxing@oc0558782468.ibm.com>

Closes #9773 from huaxingao/spark-11778.
---
 .../scala/org/apache/spark/sql/DataFrameReader.scala   |  3 ++-
 .../spark/sql/hive/HiveDataFrameAnalyticsSuite.scala   | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index 5872fbded383..dcb3737b70fb 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -313,7 +313,8 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    * @since 1.4.0
    */
   def table(tableName: String): DataFrame = {
-    DataFrame(sqlContext, sqlContext.catalog.lookupRelation(TableIdentifier(tableName)))
+    DataFrame(sqlContext,
+      sqlContext.catalog.lookupRelation(SqlParser.parseTableIdentifier(tableName)))
   }
 
   /**
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
index 9864acf76526..f19a74d4b372 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/HiveDataFrameAnalyticsSuite.scala
@@ -34,10 +34,14 @@ class HiveDataFrameAnalyticsSuite extends QueryTest with TestHiveSingleton with
   override def beforeAll() {
     testData = Seq((1, 2), (2, 2), (3, 4)).toDF("a", "b")
     hiveContext.registerDataFrameAsTable(testData, "mytable")
+    hiveContext.sql("create schema usrdb")
+    hiveContext.sql("create table usrdb.test(c1 int)")
   }
 
   override def afterAll(): Unit = {
     hiveContext.dropTempTable("mytable")
+    hiveContext.sql("drop table usrdb.test")
+    hiveContext.sql("drop schema usrdb")
   }
 
   test("rollup") {
@@ -74,4 +78,10 @@ class HiveDataFrameAnalyticsSuite extends QueryTest with TestHiveSingleton with
       sql("select a, b, sum(b) from mytable group by a, b with cube").collect()
     )
   }
+
+  // There was a bug in DataFrameFrameReader.table and it has problem for table with schema name,
+  // Before fix, it throw Exceptionorg.apache.spark.sql.catalyst.analysis.NoSuchTableException
+  test("table name with schema") {
+    hiveContext.read.table("usrdb.test")
+  }
 }

From 599a8c6e2bf7da70b20ef3046f5ce099dfd637f8 Mon Sep 17 00:00:00 2001
From: David Tolpin <david.tolpin@gmail.com>
Date: Thu, 19 Nov 2015 13:57:23 -0800
Subject: [PATCH 803/896] [SPARK-11812][PYSPARK] invFunc=None works properly
 with python's reduceByKeyAndWindow

invFunc is optional and can be None. Instead of invFunc (the parameter) invReduceFunc (a local function) was checked for trueness (that is, not None, in this context). A local function is never None,
thus the case of invFunc=None (a common one when inverse reduction is not defined) was treated incorrectly, resulting in loss of data.

In addition, the docstring used wrong parameter names, also fixed.

Author: David Tolpin <david.tolpin@gmail.com>

Closes #9775 from dtolpin/master.
---
 python/pyspark/streaming/dstream.py |  6 +++---
 python/pyspark/streaming/tests.py   | 11 +++++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/python/pyspark/streaming/dstream.py b/python/pyspark/streaming/dstream.py
index 698336cfce18..acec850f02c2 100644
--- a/python/pyspark/streaming/dstream.py
+++ b/python/pyspark/streaming/dstream.py
@@ -524,8 +524,8 @@ def reduceByKeyAndWindow(self, func, invFunc, windowDuration, slideDuration=None
         `invFunc` can be None, then it will reduce all the RDDs in window, could be slower
         than having `invFunc`.
 
-        @param reduceFunc:     associative reduce function
-        @param invReduceFunc:  inverse function of `reduceFunc`
+        @param func:           associative reduce function
+        @param invFunc:        inverse function of `reduceFunc`
         @param windowDuration: width of the window; must be a multiple of this DStream's
                               batching interval
         @param slideDuration:  sliding interval of the window (i.e., the interval after which
@@ -556,7 +556,7 @@ def invReduceFunc(t, a, b):
                                     if kv[1] is not None else kv[0])
 
         jreduceFunc = TransformFunction(self._sc, reduceFunc, reduced._jrdd_deserializer)
-        if invReduceFunc:
+        if invFunc:
             jinvReduceFunc = TransformFunction(self._sc, invReduceFunc, reduced._jrdd_deserializer)
         else:
             jinvReduceFunc = None
diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 0bcd1f15532b..3403f6d20d78 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -582,6 +582,17 @@ def test_reduce_by_invalid_window(self):
         self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 0.1, 0.1))
         self.assertRaises(ValueError, lambda: d1.reduceByKeyAndWindow(None, None, 1, 0.1))
 
+    def test_reduce_by_key_and_window_with_none_invFunc(self):
+        input = [range(1), range(2), range(3), range(4), range(5), range(6)]
+
+        def func(dstream):
+            return dstream.map(lambda x: (x, 1))\
+                .reduceByKeyAndWindow(operator.add, None, 5, 1)\
+                .filter(lambda kv: kv[1] > 0).count()
+
+        expected = [[2], [4], [6], [6], [6], [6]]
+        self._test_func(input, func, expected)
+
 
 class StreamingContextTests(PySparkStreamingTestCase):
 

From 014c0f7a9dfdb1686fa9aeacaadb2a17a855a943 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Thu, 19 Nov 2015 14:48:18 -0800
Subject: [PATCH 804/896] [SPARK-11858][SQL] Move sql.columnar into
 sql.execution.

In addition, tightened visibility of a lot of classes in the columnar package from private[sql] to private[columnar].

Author: Reynold Xin <rxin@databricks.com>

Closes #9842 from rxin/SPARK-11858.
---
 .../spark/sql/execution/CacheManager.scala    |  2 +-
 .../spark/sql/execution/SparkStrategies.scala |  2 +-
 .../columnar/ColumnAccessor.scala             | 42 +++++++--------
 .../columnar/ColumnBuilder.scala              | 51 ++++++++++---------
 .../columnar/ColumnStats.scala                | 34 ++++++-------
 .../{ => execution}/columnar/ColumnType.scala | 48 ++++++++---------
 .../columnar/GenerateColumnAccessor.scala     |  4 +-
 .../columnar/InMemoryColumnarTableScan.scala  |  5 +-
 .../columnar/NullableColumnAccessor.scala     |  4 +-
 .../columnar/NullableColumnBuilder.scala      |  4 +-
 .../CompressibleColumnAccessor.scala          |  6 +--
 .../CompressibleColumnBuilder.scala           |  6 +--
 .../compression/CompressionScheme.scala       | 16 +++---
 .../compression/compressionSchemes.scala      | 16 +++---
 .../apache/spark/sql/execution/package.scala  |  2 +
 .../apache/spark/sql/CachedTableSuite.scala   |  4 +-
 .../org/apache/spark/sql/QueryTest.scala      |  2 +-
 .../columnar/ColumnStatsSuite.scala           |  6 +--
 .../columnar/ColumnTypeSuite.scala            |  4 +-
 .../columnar/ColumnarTestUtils.scala          |  2 +-
 .../columnar/InMemoryColumnarQuerySuite.scala |  2 +-
 .../NullableColumnAccessorSuite.scala         |  4 +-
 .../columnar/NullableColumnBuilderSuite.scala |  4 +-
 .../columnar/PartitionBatchPruningSuite.scala |  2 +-
 .../compression/BooleanBitSetSuite.scala      |  6 +--
 .../compression/DictionaryEncodingSuite.scala |  6 +--
 .../compression/IntegralDeltaSuite.scala      |  6 +--
 .../compression/RunLengthEncodingSuite.scala  |  6 +--
 .../TestCompressibleColumnBuilder.scala       |  4 +-
 .../spark/sql/hive/CachedTableSuite.scala     |  2 +-
 30 files changed, 155 insertions(+), 147 deletions(-)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnAccessor.scala (75%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnBuilder.scala (74%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnStats.scala (88%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnType.scala (93%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/GenerateColumnAccessor.scala (98%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/InMemoryColumnarTableScan.scala (98%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/NullableColumnAccessor.scala (94%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/NullableColumnBuilder.scala (95%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/compression/CompressibleColumnAccessor.scala (84%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/compression/CompressibleColumnBuilder.scala (94%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/compression/CompressionScheme.scala (83%)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/columnar/compression/compressionSchemes.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnStatsSuite.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnTypeSuite.scala (97%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/ColumnarTestUtils.scala (98%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/InMemoryColumnarQuerySuite.scala (99%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/NullableColumnAccessorSuite.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/NullableColumnBuilderSuite.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/PartitionBatchPruningSuite.scala (99%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/compression/BooleanBitSetSuite.scala (94%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/compression/DictionaryEncodingSuite.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/compression/IntegralDeltaSuite.scala (96%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/compression/RunLengthEncodingSuite.scala (95%)
 rename sql/core/src/test/scala/org/apache/spark/sql/{ => execution}/columnar/compression/TestCompressibleColumnBuilder.scala (93%)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
index f85aeb1b0269..293fcfe96e67 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala
@@ -22,7 +22,7 @@ import java.util.concurrent.locks.ReentrantReadWriteLock
 import org.apache.spark.Logging
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
-import org.apache.spark.sql.columnar.InMemoryRelation
+import org.apache.spark.sql.execution.columnar.InMemoryRelation
 import org.apache.spark.storage.StorageLevel
 import org.apache.spark.storage.StorageLevel.MEMORY_AND_DISK
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
index 3d4ce633c07c..f67c951bc066 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala
@@ -24,7 +24,7 @@ import org.apache.spark.sql.catalyst.planning._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical.{BroadcastHint, LogicalPlan}
 import org.apache.spark.sql.catalyst.plans.physical._
-import org.apache.spark.sql.columnar.{InMemoryColumnarTableScan, InMemoryRelation}
+import org.apache.spark.sql.execution.columnar.{InMemoryColumnarTableScan, InMemoryRelation}
 import org.apache.spark.sql.execution.datasources.{CreateTableUsing, CreateTempTableUsing, DescribeCommand => LogicalDescribeCommand, _}
 import org.apache.spark.sql.execution.{DescribeCommand => RunnableDescribeCommand}
 import org.apache.spark.sql.{Strategy, execution}
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnAccessor.scala
similarity index 75%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnAccessor.scala
index 42ec4d3433f1..fee36f602389 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnAccessor.scala
@@ -15,12 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.{ByteBuffer, ByteOrder}
 
 import org.apache.spark.sql.catalyst.expressions.{MutableRow, UnsafeArrayData, UnsafeMapData, UnsafeRow}
-import org.apache.spark.sql.columnar.compression.CompressibleColumnAccessor
+import org.apache.spark.sql.execution.columnar.compression.CompressibleColumnAccessor
 import org.apache.spark.sql.types._
 
 /**
@@ -29,7 +29,7 @@ import org.apache.spark.sql.types._
  * a [[MutableRow]]. In this way, boxing cost can be avoided by leveraging the setter methods
  * for primitive values provided by [[MutableRow]].
  */
-private[sql] trait ColumnAccessor {
+private[columnar] trait ColumnAccessor {
   initialize()
 
   protected def initialize()
@@ -41,7 +41,7 @@ private[sql] trait ColumnAccessor {
   protected def underlyingBuffer: ByteBuffer
 }
 
-private[sql] abstract class BasicColumnAccessor[JvmType](
+private[columnar] abstract class BasicColumnAccessor[JvmType](
     protected val buffer: ByteBuffer,
     protected val columnType: ColumnType[JvmType])
   extends ColumnAccessor {
@@ -61,65 +61,65 @@ private[sql] abstract class BasicColumnAccessor[JvmType](
   protected def underlyingBuffer = buffer
 }
 
-private[sql] class NullColumnAccessor(buffer: ByteBuffer)
+private[columnar] class NullColumnAccessor(buffer: ByteBuffer)
   extends BasicColumnAccessor[Any](buffer, NULL)
   with NullableColumnAccessor
 
-private[sql] abstract class NativeColumnAccessor[T <: AtomicType](
+private[columnar] abstract class NativeColumnAccessor[T <: AtomicType](
     override protected val buffer: ByteBuffer,
     override protected val columnType: NativeColumnType[T])
   extends BasicColumnAccessor(buffer, columnType)
   with NullableColumnAccessor
   with CompressibleColumnAccessor[T]
 
-private[sql] class BooleanColumnAccessor(buffer: ByteBuffer)
+private[columnar] class BooleanColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, BOOLEAN)
 
-private[sql] class ByteColumnAccessor(buffer: ByteBuffer)
+private[columnar] class ByteColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, BYTE)
 
-private[sql] class ShortColumnAccessor(buffer: ByteBuffer)
+private[columnar] class ShortColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, SHORT)
 
-private[sql] class IntColumnAccessor(buffer: ByteBuffer)
+private[columnar] class IntColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, INT)
 
-private[sql] class LongColumnAccessor(buffer: ByteBuffer)
+private[columnar] class LongColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, LONG)
 
-private[sql] class FloatColumnAccessor(buffer: ByteBuffer)
+private[columnar] class FloatColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, FLOAT)
 
-private[sql] class DoubleColumnAccessor(buffer: ByteBuffer)
+private[columnar] class DoubleColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, DOUBLE)
 
-private[sql] class StringColumnAccessor(buffer: ByteBuffer)
+private[columnar] class StringColumnAccessor(buffer: ByteBuffer)
   extends NativeColumnAccessor(buffer, STRING)
 
-private[sql] class BinaryColumnAccessor(buffer: ByteBuffer)
+private[columnar] class BinaryColumnAccessor(buffer: ByteBuffer)
   extends BasicColumnAccessor[Array[Byte]](buffer, BINARY)
   with NullableColumnAccessor
 
-private[sql] class CompactDecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
+private[columnar] class CompactDecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
   extends NativeColumnAccessor(buffer, COMPACT_DECIMAL(dataType))
 
-private[sql] class DecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
+private[columnar] class DecimalColumnAccessor(buffer: ByteBuffer, dataType: DecimalType)
   extends BasicColumnAccessor[Decimal](buffer, LARGE_DECIMAL(dataType))
   with NullableColumnAccessor
 
-private[sql] class StructColumnAccessor(buffer: ByteBuffer, dataType: StructType)
+private[columnar] class StructColumnAccessor(buffer: ByteBuffer, dataType: StructType)
   extends BasicColumnAccessor[UnsafeRow](buffer, STRUCT(dataType))
   with NullableColumnAccessor
 
-private[sql] class ArrayColumnAccessor(buffer: ByteBuffer, dataType: ArrayType)
+private[columnar] class ArrayColumnAccessor(buffer: ByteBuffer, dataType: ArrayType)
   extends BasicColumnAccessor[UnsafeArrayData](buffer, ARRAY(dataType))
   with NullableColumnAccessor
 
-private[sql] class MapColumnAccessor(buffer: ByteBuffer, dataType: MapType)
+private[columnar] class MapColumnAccessor(buffer: ByteBuffer, dataType: MapType)
   extends BasicColumnAccessor[UnsafeMapData](buffer, MAP(dataType))
   with NullableColumnAccessor
 
-private[sql] object ColumnAccessor {
+private[columnar] object ColumnAccessor {
   def apply(dataType: DataType, buffer: ByteBuffer): ColumnAccessor = {
     val buf = buffer.order(ByteOrder.nativeOrder)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnBuilder.scala
similarity index 74%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnBuilder.scala
index 599f30f2d73b..7e26f19bb744 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnBuilder.scala
@@ -15,16 +15,16 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.{ByteBuffer, ByteOrder}
 
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.columnar.ColumnBuilder._
-import org.apache.spark.sql.columnar.compression.{AllCompressionSchemes, CompressibleColumnBuilder}
+import org.apache.spark.sql.execution.columnar.ColumnBuilder._
+import org.apache.spark.sql.execution.columnar.compression.{AllCompressionSchemes, CompressibleColumnBuilder}
 import org.apache.spark.sql.types._
 
-private[sql] trait ColumnBuilder {
+private[columnar] trait ColumnBuilder {
   /**
    * Initializes with an approximate lower bound on the expected number of elements in this column.
    */
@@ -46,7 +46,7 @@ private[sql] trait ColumnBuilder {
   def build(): ByteBuffer
 }
 
-private[sql] class BasicColumnBuilder[JvmType](
+private[columnar] class BasicColumnBuilder[JvmType](
     val columnStats: ColumnStats,
     val columnType: ColumnType[JvmType])
   extends ColumnBuilder {
@@ -84,17 +84,17 @@ private[sql] class BasicColumnBuilder[JvmType](
   }
 }
 
-private[sql] class NullColumnBuilder
+private[columnar] class NullColumnBuilder
   extends BasicColumnBuilder[Any](new ObjectColumnStats(NullType), NULL)
   with NullableColumnBuilder
 
-private[sql] abstract class ComplexColumnBuilder[JvmType](
+private[columnar] abstract class ComplexColumnBuilder[JvmType](
     columnStats: ColumnStats,
     columnType: ColumnType[JvmType])
   extends BasicColumnBuilder[JvmType](columnStats, columnType)
   with NullableColumnBuilder
 
-private[sql] abstract class NativeColumnBuilder[T <: AtomicType](
+private[columnar] abstract class NativeColumnBuilder[T <: AtomicType](
     override val columnStats: ColumnStats,
     override val columnType: NativeColumnType[T])
   extends BasicColumnBuilder[T#InternalType](columnStats, columnType)
@@ -102,40 +102,45 @@ private[sql] abstract class NativeColumnBuilder[T <: AtomicType](
   with AllCompressionSchemes
   with CompressibleColumnBuilder[T]
 
-private[sql] class BooleanColumnBuilder extends NativeColumnBuilder(new BooleanColumnStats, BOOLEAN)
+private[columnar]
+class BooleanColumnBuilder extends NativeColumnBuilder(new BooleanColumnStats, BOOLEAN)
 
-private[sql] class ByteColumnBuilder extends NativeColumnBuilder(new ByteColumnStats, BYTE)
+private[columnar]
+class ByteColumnBuilder extends NativeColumnBuilder(new ByteColumnStats, BYTE)
 
-private[sql] class ShortColumnBuilder extends NativeColumnBuilder(new ShortColumnStats, SHORT)
+private[columnar] class ShortColumnBuilder extends NativeColumnBuilder(new ShortColumnStats, SHORT)
 
-private[sql] class IntColumnBuilder extends NativeColumnBuilder(new IntColumnStats, INT)
+private[columnar] class IntColumnBuilder extends NativeColumnBuilder(new IntColumnStats, INT)
 
-private[sql] class LongColumnBuilder extends NativeColumnBuilder(new LongColumnStats, LONG)
+private[columnar] class LongColumnBuilder extends NativeColumnBuilder(new LongColumnStats, LONG)
 
-private[sql] class FloatColumnBuilder extends NativeColumnBuilder(new FloatColumnStats, FLOAT)
+private[columnar] class FloatColumnBuilder extends NativeColumnBuilder(new FloatColumnStats, FLOAT)
 
-private[sql] class DoubleColumnBuilder extends NativeColumnBuilder(new DoubleColumnStats, DOUBLE)
+private[columnar]
+class DoubleColumnBuilder extends NativeColumnBuilder(new DoubleColumnStats, DOUBLE)
 
-private[sql] class StringColumnBuilder extends NativeColumnBuilder(new StringColumnStats, STRING)
+private[columnar]
+class StringColumnBuilder extends NativeColumnBuilder(new StringColumnStats, STRING)
 
-private[sql] class BinaryColumnBuilder extends ComplexColumnBuilder(new BinaryColumnStats, BINARY)
+private[columnar]
+class BinaryColumnBuilder extends ComplexColumnBuilder(new BinaryColumnStats, BINARY)
 
-private[sql] class CompactDecimalColumnBuilder(dataType: DecimalType)
+private[columnar] class CompactDecimalColumnBuilder(dataType: DecimalType)
   extends NativeColumnBuilder(new DecimalColumnStats(dataType), COMPACT_DECIMAL(dataType))
 
-private[sql] class DecimalColumnBuilder(dataType: DecimalType)
+private[columnar] class DecimalColumnBuilder(dataType: DecimalType)
   extends ComplexColumnBuilder(new DecimalColumnStats(dataType), LARGE_DECIMAL(dataType))
 
-private[sql] class StructColumnBuilder(dataType: StructType)
+private[columnar] class StructColumnBuilder(dataType: StructType)
   extends ComplexColumnBuilder(new ObjectColumnStats(dataType), STRUCT(dataType))
 
-private[sql] class ArrayColumnBuilder(dataType: ArrayType)
+private[columnar] class ArrayColumnBuilder(dataType: ArrayType)
   extends ComplexColumnBuilder(new ObjectColumnStats(dataType), ARRAY(dataType))
 
-private[sql] class MapColumnBuilder(dataType: MapType)
+private[columnar] class MapColumnBuilder(dataType: MapType)
   extends ComplexColumnBuilder(new ObjectColumnStats(dataType), MAP(dataType))
 
-private[sql] object ColumnBuilder {
+private[columnar] object ColumnBuilder {
   val DEFAULT_INITIAL_BUFFER_SIZE = 128 * 1024
   val MAX_BATCH_SIZE_IN_BYTE = 4 * 1024 * 1024L
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnStats.scala
similarity index 88%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnStats.scala
index 91a05650585c..c52ee9ffd6d2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnStats.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnStats.scala
@@ -15,14 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{GenericInternalRow, Attribute, AttributeMap, AttributeReference}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.UTF8String
 
-private[sql] class ColumnStatisticsSchema(a: Attribute) extends Serializable {
+private[columnar] class ColumnStatisticsSchema(a: Attribute) extends Serializable {
   val upperBound = AttributeReference(a.name + ".upperBound", a.dataType, nullable = true)()
   val lowerBound = AttributeReference(a.name + ".lowerBound", a.dataType, nullable = true)()
   val nullCount = AttributeReference(a.name + ".nullCount", IntegerType, nullable = false)()
@@ -32,7 +32,7 @@ private[sql] class ColumnStatisticsSchema(a: Attribute) extends Serializable {
   val schema = Seq(lowerBound, upperBound, nullCount, count, sizeInBytes)
 }
 
-private[sql] class PartitionStatistics(tableSchema: Seq[Attribute]) extends Serializable {
+private[columnar] class PartitionStatistics(tableSchema: Seq[Attribute]) extends Serializable {
   val (forAttribute, schema) = {
     val allStats = tableSchema.map(a => a -> new ColumnStatisticsSchema(a))
     (AttributeMap(allStats), allStats.map(_._2.schema).foldLeft(Seq.empty[Attribute])(_ ++ _))
@@ -45,10 +45,10 @@ private[sql] class PartitionStatistics(tableSchema: Seq[Attribute]) extends Seri
  * NOTE: we intentionally avoid using `Ordering[T]` to compare values here because `Ordering[T]`
  * brings significant performance penalty.
  */
-private[sql] sealed trait ColumnStats extends Serializable {
+private[columnar] sealed trait ColumnStats extends Serializable {
   protected var count = 0
   protected var nullCount = 0
-  private[sql] var sizeInBytes = 0L
+  private[columnar] var sizeInBytes = 0L
 
   /**
    * Gathers statistics information from `row(ordinal)`.
@@ -72,14 +72,14 @@ private[sql] sealed trait ColumnStats extends Serializable {
 /**
  * A no-op ColumnStats only used for testing purposes.
  */
-private[sql] class NoopColumnStats extends ColumnStats {
+private[columnar] class NoopColumnStats extends ColumnStats {
   override def gatherStats(row: InternalRow, ordinal: Int): Unit = super.gatherStats(row, ordinal)
 
   override def collectedStatistics: GenericInternalRow =
     new GenericInternalRow(Array[Any](null, null, nullCount, count, 0L))
 }
 
-private[sql] class BooleanColumnStats extends ColumnStats {
+private[columnar] class BooleanColumnStats extends ColumnStats {
   protected var upper = false
   protected var lower = true
 
@@ -97,7 +97,7 @@ private[sql] class BooleanColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class ByteColumnStats extends ColumnStats {
+private[columnar] class ByteColumnStats extends ColumnStats {
   protected var upper = Byte.MinValue
   protected var lower = Byte.MaxValue
 
@@ -115,7 +115,7 @@ private[sql] class ByteColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class ShortColumnStats extends ColumnStats {
+private[columnar] class ShortColumnStats extends ColumnStats {
   protected var upper = Short.MinValue
   protected var lower = Short.MaxValue
 
@@ -133,7 +133,7 @@ private[sql] class ShortColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class IntColumnStats extends ColumnStats {
+private[columnar] class IntColumnStats extends ColumnStats {
   protected var upper = Int.MinValue
   protected var lower = Int.MaxValue
 
@@ -151,7 +151,7 @@ private[sql] class IntColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class LongColumnStats extends ColumnStats {
+private[columnar] class LongColumnStats extends ColumnStats {
   protected var upper = Long.MinValue
   protected var lower = Long.MaxValue
 
@@ -169,7 +169,7 @@ private[sql] class LongColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class FloatColumnStats extends ColumnStats {
+private[columnar] class FloatColumnStats extends ColumnStats {
   protected var upper = Float.MinValue
   protected var lower = Float.MaxValue
 
@@ -187,7 +187,7 @@ private[sql] class FloatColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class DoubleColumnStats extends ColumnStats {
+private[columnar] class DoubleColumnStats extends ColumnStats {
   protected var upper = Double.MinValue
   protected var lower = Double.MaxValue
 
@@ -205,7 +205,7 @@ private[sql] class DoubleColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class StringColumnStats extends ColumnStats {
+private[columnar] class StringColumnStats extends ColumnStats {
   protected var upper: UTF8String = null
   protected var lower: UTF8String = null
 
@@ -223,7 +223,7 @@ private[sql] class StringColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class BinaryColumnStats extends ColumnStats {
+private[columnar] class BinaryColumnStats extends ColumnStats {
   override def gatherStats(row: InternalRow, ordinal: Int): Unit = {
     super.gatherStats(row, ordinal)
     if (!row.isNullAt(ordinal)) {
@@ -235,7 +235,7 @@ private[sql] class BinaryColumnStats extends ColumnStats {
     new GenericInternalRow(Array[Any](null, null, nullCount, count, sizeInBytes))
 }
 
-private[sql] class DecimalColumnStats(precision: Int, scale: Int) extends ColumnStats {
+private[columnar] class DecimalColumnStats(precision: Int, scale: Int) extends ColumnStats {
   def this(dt: DecimalType) = this(dt.precision, dt.scale)
 
   protected var upper: Decimal = null
@@ -256,7 +256,7 @@ private[sql] class DecimalColumnStats(precision: Int, scale: Int) extends Column
     new GenericInternalRow(Array[Any](lower, upper, nullCount, count, sizeInBytes))
 }
 
-private[sql] class ObjectColumnStats(dataType: DataType) extends ColumnStats {
+private[columnar] class ObjectColumnStats(dataType: DataType) extends ColumnStats {
   val columnType = ColumnType(dataType)
 
   override def gatherStats(row: InternalRow, ordinal: Int): Unit = {
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
similarity index 93%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
index 68e509eb5047..c9f2329db4b6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/ColumnType.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/ColumnType.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.math.{BigDecimal, BigInteger}
 import java.nio.ByteBuffer
@@ -41,7 +41,7 @@ import org.apache.spark.unsafe.types.UTF8String
  *
  * WARNNING: This only works with HeapByteBuffer
  */
-object ByteBufferHelper {
+private[columnar] object ByteBufferHelper {
   def getInt(buffer: ByteBuffer): Int = {
     val pos = buffer.position()
     buffer.position(pos + 4)
@@ -73,7 +73,7 @@ object ByteBufferHelper {
  *
  * @tparam JvmType Underlying Java type to represent the elements.
  */
-private[sql] sealed abstract class ColumnType[JvmType] {
+private[columnar] sealed abstract class ColumnType[JvmType] {
 
   // The catalyst data type of this column.
   def dataType: DataType
@@ -142,7 +142,7 @@ private[sql] sealed abstract class ColumnType[JvmType] {
   override def toString: String = getClass.getSimpleName.stripSuffix("$")
 }
 
-private[sql] object NULL extends ColumnType[Any] {
+private[columnar] object NULL extends ColumnType[Any] {
 
   override def dataType: DataType = NullType
   override def defaultSize: Int = 0
@@ -152,7 +152,7 @@ private[sql] object NULL extends ColumnType[Any] {
   override def getField(row: InternalRow, ordinal: Int): Any = null
 }
 
-private[sql] abstract class NativeColumnType[T <: AtomicType](
+private[columnar] abstract class NativeColumnType[T <: AtomicType](
     val dataType: T,
     val defaultSize: Int)
   extends ColumnType[T#InternalType] {
@@ -163,7 +163,7 @@ private[sql] abstract class NativeColumnType[T <: AtomicType](
   def scalaTag: TypeTag[dataType.InternalType] = dataType.tag
 }
 
-private[sql] object INT extends NativeColumnType(IntegerType, 4) {
+private[columnar] object INT extends NativeColumnType(IntegerType, 4) {
   override def append(v: Int, buffer: ByteBuffer): Unit = {
     buffer.putInt(v)
   }
@@ -192,7 +192,7 @@ private[sql] object INT extends NativeColumnType(IntegerType, 4) {
   }
 }
 
-private[sql] object LONG extends NativeColumnType(LongType, 8) {
+private[columnar] object LONG extends NativeColumnType(LongType, 8) {
   override def append(v: Long, buffer: ByteBuffer): Unit = {
     buffer.putLong(v)
   }
@@ -220,7 +220,7 @@ private[sql] object LONG extends NativeColumnType(LongType, 8) {
   }
 }
 
-private[sql] object FLOAT extends NativeColumnType(FloatType, 4) {
+private[columnar] object FLOAT extends NativeColumnType(FloatType, 4) {
   override def append(v: Float, buffer: ByteBuffer): Unit = {
     buffer.putFloat(v)
   }
@@ -248,7 +248,7 @@ private[sql] object FLOAT extends NativeColumnType(FloatType, 4) {
   }
 }
 
-private[sql] object DOUBLE extends NativeColumnType(DoubleType, 8) {
+private[columnar] object DOUBLE extends NativeColumnType(DoubleType, 8) {
   override def append(v: Double, buffer: ByteBuffer): Unit = {
     buffer.putDouble(v)
   }
@@ -276,7 +276,7 @@ private[sql] object DOUBLE extends NativeColumnType(DoubleType, 8) {
   }
 }
 
-private[sql] object BOOLEAN extends NativeColumnType(BooleanType, 1) {
+private[columnar] object BOOLEAN extends NativeColumnType(BooleanType, 1) {
   override def append(v: Boolean, buffer: ByteBuffer): Unit = {
     buffer.put(if (v) 1: Byte else 0: Byte)
   }
@@ -302,7 +302,7 @@ private[sql] object BOOLEAN extends NativeColumnType(BooleanType, 1) {
   }
 }
 
-private[sql] object BYTE extends NativeColumnType(ByteType, 1) {
+private[columnar] object BYTE extends NativeColumnType(ByteType, 1) {
   override def append(v: Byte, buffer: ByteBuffer): Unit = {
     buffer.put(v)
   }
@@ -330,7 +330,7 @@ private[sql] object BYTE extends NativeColumnType(ByteType, 1) {
   }
 }
 
-private[sql] object SHORT extends NativeColumnType(ShortType, 2) {
+private[columnar] object SHORT extends NativeColumnType(ShortType, 2) {
   override def append(v: Short, buffer: ByteBuffer): Unit = {
     buffer.putShort(v)
   }
@@ -362,7 +362,7 @@ private[sql] object SHORT extends NativeColumnType(ShortType, 2) {
  * A fast path to copy var-length bytes between ByteBuffer and UnsafeRow without creating wrapper
  * objects.
  */
-private[sql] trait DirectCopyColumnType[JvmType] extends ColumnType[JvmType] {
+private[columnar] trait DirectCopyColumnType[JvmType] extends ColumnType[JvmType] {
 
   // copy the bytes from ByteBuffer to UnsafeRow
   override def extract(buffer: ByteBuffer, row: MutableRow, ordinal: Int): Unit = {
@@ -387,7 +387,7 @@ private[sql] trait DirectCopyColumnType[JvmType] extends ColumnType[JvmType] {
   }
 }
 
-private[sql] object STRING
+private[columnar] object STRING
   extends NativeColumnType(StringType, 8) with DirectCopyColumnType[UTF8String] {
 
   override def actualSize(row: InternalRow, ordinal: Int): Int = {
@@ -425,7 +425,7 @@ private[sql] object STRING
   override def clone(v: UTF8String): UTF8String = v.clone()
 }
 
-private[sql] case class COMPACT_DECIMAL(precision: Int, scale: Int)
+private[columnar] case class COMPACT_DECIMAL(precision: Int, scale: Int)
   extends NativeColumnType(DecimalType(precision, scale), 8) {
 
   override def extract(buffer: ByteBuffer): Decimal = {
@@ -467,13 +467,13 @@ private[sql] case class COMPACT_DECIMAL(precision: Int, scale: Int)
   }
 }
 
-private[sql] object COMPACT_DECIMAL {
+private[columnar] object COMPACT_DECIMAL {
   def apply(dt: DecimalType): COMPACT_DECIMAL = {
     COMPACT_DECIMAL(dt.precision, dt.scale)
   }
 }
 
-private[sql] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize: Int)
+private[columnar] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize: Int)
   extends ColumnType[JvmType] with DirectCopyColumnType[JvmType] {
 
   def serialize(value: JvmType): Array[Byte]
@@ -492,7 +492,7 @@ private[sql] sealed abstract class ByteArrayColumnType[JvmType](val defaultSize:
   }
 }
 
-private[sql] object BINARY extends ByteArrayColumnType[Array[Byte]](16) {
+private[columnar] object BINARY extends ByteArrayColumnType[Array[Byte]](16) {
 
   def dataType: DataType = BinaryType
 
@@ -512,7 +512,7 @@ private[sql] object BINARY extends ByteArrayColumnType[Array[Byte]](16) {
   def deserialize(bytes: Array[Byte]): Array[Byte] = bytes
 }
 
-private[sql] case class LARGE_DECIMAL(precision: Int, scale: Int)
+private[columnar] case class LARGE_DECIMAL(precision: Int, scale: Int)
   extends ByteArrayColumnType[Decimal](12) {
 
   override val dataType: DataType = DecimalType(precision, scale)
@@ -539,13 +539,13 @@ private[sql] case class LARGE_DECIMAL(precision: Int, scale: Int)
   }
 }
 
-private[sql] object LARGE_DECIMAL {
+private[columnar] object LARGE_DECIMAL {
   def apply(dt: DecimalType): LARGE_DECIMAL = {
     LARGE_DECIMAL(dt.precision, dt.scale)
   }
 }
 
-private[sql] case class STRUCT(dataType: StructType)
+private[columnar] case class STRUCT(dataType: StructType)
   extends ColumnType[UnsafeRow] with DirectCopyColumnType[UnsafeRow] {
 
   private val numOfFields: Int = dataType.fields.size
@@ -586,7 +586,7 @@ private[sql] case class STRUCT(dataType: StructType)
   override def clone(v: UnsafeRow): UnsafeRow = v.copy()
 }
 
-private[sql] case class ARRAY(dataType: ArrayType)
+private[columnar] case class ARRAY(dataType: ArrayType)
   extends ColumnType[UnsafeArrayData] with DirectCopyColumnType[UnsafeArrayData] {
 
   override def defaultSize: Int = 16
@@ -625,7 +625,7 @@ private[sql] case class ARRAY(dataType: ArrayType)
   override def clone(v: UnsafeArrayData): UnsafeArrayData = v.copy()
 }
 
-private[sql] case class MAP(dataType: MapType)
+private[columnar] case class MAP(dataType: MapType)
   extends ColumnType[UnsafeMapData] with DirectCopyColumnType[UnsafeMapData] {
 
   override def defaultSize: Int = 32
@@ -663,7 +663,7 @@ private[sql] case class MAP(dataType: MapType)
   override def clone(v: UnsafeMapData): UnsafeMapData = v.copy()
 }
 
-private[sql] object ColumnType {
+private[columnar] object ColumnType {
   def apply(dataType: DataType): ColumnType[_] = {
     dataType match {
       case NullType => NULL
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/GenerateColumnAccessor.scala
similarity index 98%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/GenerateColumnAccessor.scala
index ff9393b465b7..eaafc96e4d2e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/GenerateColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/GenerateColumnAccessor.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
@@ -121,7 +121,7 @@ object GenerateColumnAccessor extends CodeGenerator[Seq[DataType], ColumnarItera
       import org.apache.spark.sql.types.DataType;
       import org.apache.spark.sql.catalyst.expressions.codegen.BufferHolder;
       import org.apache.spark.sql.catalyst.expressions.codegen.UnsafeRowWriter;
-      import org.apache.spark.sql.columnar.MutableUnsafeRow;
+      import org.apache.spark.sql.execution.columnar.MutableUnsafeRow;
 
       public SpecificColumnarIterator generate($exprType[] expr) {
         return new SpecificColumnarIterator();
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarTableScan.scala
similarity index 98%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarTableScan.scala
index ae77298e6da2..ce701fb3a7f2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/InMemoryColumnarTableScan.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarTableScan.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import scala.collection.mutable.ArrayBuffer
 
@@ -50,7 +50,8 @@ private[sql] object InMemoryRelation {
  * @param buffers The buffers for serialized columns
  * @param stats The stat of columns
  */
-private[sql] case class CachedBatch(numRows: Int, buffers: Array[Array[Byte]], stats: InternalRow)
+private[columnar]
+case class CachedBatch(numRows: Int, buffers: Array[Array[Byte]], stats: InternalRow)
 
 private[sql] case class InMemoryRelation(
     output: Seq[Attribute],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessor.scala
similarity index 94%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessor.scala
index 7eaecfe047c3..8d99546924de 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessor.scala
@@ -15,13 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.{ByteOrder, ByteBuffer}
 
 import org.apache.spark.sql.catalyst.expressions.MutableRow
 
-private[sql] trait NullableColumnAccessor extends ColumnAccessor {
+private[columnar] trait NullableColumnAccessor extends ColumnAccessor {
   private var nullsBuffer: ByteBuffer = _
   private var nullCount: Int = _
   private var seenNulls: Int = 0
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilder.scala
similarity index 95%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilder.scala
index 76cfddf1cd01..3a1931bfb5c8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/NullableColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilder.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.{ByteBuffer, ByteOrder}
 
@@ -34,7 +34,7 @@ import org.apache.spark.sql.catalyst.InternalRow
  *   +---+-----+---------+
  * }}}
  */
-private[sql] trait NullableColumnBuilder extends ColumnBuilder {
+private[columnar] trait NullableColumnBuilder extends ColumnBuilder {
   protected var nulls: ByteBuffer = _
   protected var nullCount: Int = _
   private var pos: Int = _
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnAccessor.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnAccessor.scala
similarity index 84%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnAccessor.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnAccessor.scala
index cb205defbb1a..6579b5068e65 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnAccessor.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnAccessor.scala
@@ -15,13 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import org.apache.spark.sql.catalyst.expressions.MutableRow
-import org.apache.spark.sql.columnar.{ColumnAccessor, NativeColumnAccessor}
+import org.apache.spark.sql.execution.columnar.{ColumnAccessor, NativeColumnAccessor}
 import org.apache.spark.sql.types.AtomicType
 
-private[sql] trait CompressibleColumnAccessor[T <: AtomicType] extends ColumnAccessor {
+private[columnar] trait CompressibleColumnAccessor[T <: AtomicType] extends ColumnAccessor {
   this: NativeColumnAccessor[T] =>
 
   private var decoder: Decoder[T] = _
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnBuilder.scala
similarity index 94%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnBuilder.scala
index 161021ff9615..b0e216feb559 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressibleColumnBuilder.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressibleColumnBuilder.scala
@@ -15,13 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import java.nio.{ByteBuffer, ByteOrder}
 
 import org.apache.spark.Logging
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.columnar.{ColumnBuilder, NativeColumnBuilder}
+import org.apache.spark.sql.execution.columnar.{ColumnBuilder, NativeColumnBuilder}
 import org.apache.spark.sql.types.AtomicType
 
 /**
@@ -40,7 +40,7 @@ import org.apache.spark.sql.types.AtomicType
  *     header         body
  * }}}
  */
-private[sql] trait CompressibleColumnBuilder[T <: AtomicType]
+private[columnar] trait CompressibleColumnBuilder[T <: AtomicType]
   extends ColumnBuilder with Logging {
 
   this: NativeColumnBuilder[T] with WithCompressionSchemes =>
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressionScheme.scala
similarity index 83%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressionScheme.scala
index 9322b772fd89..920381f9c63d 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/CompressionScheme.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/CompressionScheme.scala
@@ -15,15 +15,15 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import java.nio.{ByteBuffer, ByteOrder}
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.MutableRow
-import org.apache.spark.sql.columnar.{ColumnType, NativeColumnType}
+import org.apache.spark.sql.execution.columnar.{ColumnType, NativeColumnType}
 import org.apache.spark.sql.types.AtomicType
 
-private[sql] trait Encoder[T <: AtomicType] {
+private[columnar] trait Encoder[T <: AtomicType] {
   def gatherCompressibilityStats(row: InternalRow, ordinal: Int): Unit = {}
 
   def compressedSize: Int
@@ -37,13 +37,13 @@ private[sql] trait Encoder[T <: AtomicType] {
   def compress(from: ByteBuffer, to: ByteBuffer): ByteBuffer
 }
 
-private[sql] trait Decoder[T <: AtomicType] {
+private[columnar] trait Decoder[T <: AtomicType] {
   def next(row: MutableRow, ordinal: Int): Unit
 
   def hasNext: Boolean
 }
 
-private[sql] trait CompressionScheme {
+private[columnar] trait CompressionScheme {
   def typeId: Int
 
   def supports(columnType: ColumnType[_]): Boolean
@@ -53,15 +53,15 @@ private[sql] trait CompressionScheme {
   def decoder[T <: AtomicType](buffer: ByteBuffer, columnType: NativeColumnType[T]): Decoder[T]
 }
 
-private[sql] trait WithCompressionSchemes {
+private[columnar] trait WithCompressionSchemes {
   def schemes: Seq[CompressionScheme]
 }
 
-private[sql] trait AllCompressionSchemes extends WithCompressionSchemes {
+private[columnar] trait AllCompressionSchemes extends WithCompressionSchemes {
   override val schemes: Seq[CompressionScheme] = CompressionScheme.all
 }
 
-private[sql] object CompressionScheme {
+private[columnar] object CompressionScheme {
   val all: Seq[CompressionScheme] =
     Seq(PassThrough, RunLengthEncoding, DictionaryEncoding, BooleanBitSet, IntDelta, LongDelta)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/compressionSchemes.scala
similarity index 96%
rename from sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/compressionSchemes.scala
index 41c9a284e3e4..941f03b745a0 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/columnar/compression/compressionSchemes.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/compressionSchemes.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import java.nio.ByteBuffer
 
@@ -23,11 +23,11 @@ import scala.collection.mutable
 
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{MutableRow, SpecificMutableRow}
-import org.apache.spark.sql.columnar._
+import org.apache.spark.sql.execution.columnar._
 import org.apache.spark.sql.types._
 
 
-private[sql] case object PassThrough extends CompressionScheme {
+private[columnar] case object PassThrough extends CompressionScheme {
   override val typeId = 0
 
   override def supports(columnType: ColumnType[_]): Boolean = true
@@ -64,7 +64,7 @@ private[sql] case object PassThrough extends CompressionScheme {
   }
 }
 
-private[sql] case object RunLengthEncoding extends CompressionScheme {
+private[columnar] case object RunLengthEncoding extends CompressionScheme {
   override val typeId = 1
 
   override def encoder[T <: AtomicType](columnType: NativeColumnType[T]): Encoder[T] = {
@@ -172,7 +172,7 @@ private[sql] case object RunLengthEncoding extends CompressionScheme {
   }
 }
 
-private[sql] case object DictionaryEncoding extends CompressionScheme {
+private[columnar] case object DictionaryEncoding extends CompressionScheme {
   override val typeId = 2
 
   // 32K unique values allowed
@@ -281,7 +281,7 @@ private[sql] case object DictionaryEncoding extends CompressionScheme {
   }
 }
 
-private[sql] case object BooleanBitSet extends CompressionScheme {
+private[columnar] case object BooleanBitSet extends CompressionScheme {
   override val typeId = 3
 
   val BITS_PER_LONG = 64
@@ -371,7 +371,7 @@ private[sql] case object BooleanBitSet extends CompressionScheme {
   }
 }
 
-private[sql] case object IntDelta extends CompressionScheme {
+private[columnar] case object IntDelta extends CompressionScheme {
   override def typeId: Int = 4
 
   override def decoder[T <: AtomicType](buffer: ByteBuffer, columnType: NativeColumnType[T])
@@ -451,7 +451,7 @@ private[sql] case object IntDelta extends CompressionScheme {
   }
 }
 
-private[sql] case object LongDelta extends CompressionScheme {
+private[columnar] case object LongDelta extends CompressionScheme {
   override def typeId: Int = 5
 
   override def decoder[T <: AtomicType](buffer: ByteBuffer, columnType: NativeColumnType[T])
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/package.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/package.scala
index 28fa231e722d..c912734bba9e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/package.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/package.scala
@@ -19,5 +19,7 @@ package org.apache.spark.sql
 
 /**
  * The physical execution component of Spark SQL. Note that this is a private package.
+ * All classes in catalyst are considered an internal API to Spark SQL and are subject
+ * to change between minor releases.
  */
 package object execution
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
index bce94dafad75..d86df4cfb9b4 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/CachedTableSuite.scala
@@ -27,7 +27,7 @@ import scala.language.postfixOps
 import org.scalatest.concurrent.Eventually._
 
 import org.apache.spark.Accumulators
-import org.apache.spark.sql.columnar._
+import org.apache.spark.sql.execution.columnar._
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.test.{SQLTestUtils, SharedSQLContext}
 import org.apache.spark.storage.{StorageLevel, RDDBlockId}
@@ -280,7 +280,7 @@ class CachedTableSuite extends QueryTest with SQLTestUtils with SharedSQLContext
     sql("CACHE TABLE testData")
     sqlContext.table("testData").queryExecution.withCachedData.collect {
       case cached: InMemoryRelation =>
-        val actualSizeInBytes = (1 to 100).map(i => INT.defaultSize + i.toString.length + 4).sum
+        val actualSizeInBytes = (1 to 100).map(i => 4 + i.toString.length + 4).sum
         assert(cached.statistics.sizeInBytes === actualSizeInBytes)
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
index b5417b195f39..6ea1fe4ccfd8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/QueryTest.scala
@@ -23,7 +23,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.util._
-import org.apache.spark.sql.columnar.InMemoryRelation
+import org.apache.spark.sql.execution.columnar.InMemoryRelation
 
 abstract class QueryTest extends PlanTest {
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnStatsSuite.scala
similarity index 96%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnStatsSuite.scala
index 89a664001bdd..b2d04f7c5a6e 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnStatsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnStatsSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.GenericInternalRow
@@ -50,7 +50,7 @@ class ColumnStatsSuite extends SparkFunSuite {
     }
 
     test(s"$columnStatsName: non-empty") {
-      import org.apache.spark.sql.columnar.ColumnarTestUtils._
+      import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 
       val columnStats = columnStatsClass.newInstance()
       val rows = Seq.fill(10)(makeRandomRow(columnType)) ++ Seq.fill(10)(makeNullRow(1))
@@ -86,7 +86,7 @@ class ColumnStatsSuite extends SparkFunSuite {
     }
 
     test(s"$columnStatsName: non-empty") {
-      import org.apache.spark.sql.columnar.ColumnarTestUtils._
+      import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 
       val columnStats = new DecimalColumnStats(15, 10)
       val rows = Seq.fill(10)(makeRandomRow(columnType)) ++ Seq.fill(10)(makeNullRow(1))
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
similarity index 97%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
index 63bc39bfa030..34dd96929e6c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnTypeSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnTypeSuite.scala
@@ -15,14 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.{ByteOrder, ByteBuffer}
 
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
 import org.apache.spark.sql.catalyst.expressions.{UnsafeProjection, GenericMutableRow}
-import org.apache.spark.sql.columnar.ColumnarTestUtils._
+import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 import org.apache.spark.sql.types._
 import org.apache.spark.{Logging, SparkFunSuite}
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnarTestUtils.scala
similarity index 98%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnarTestUtils.scala
index a5882f7870e3..9cae65ef6f5d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/ColumnarTestUtils.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/ColumnarTestUtils.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import scala.collection.immutable.HashSet
 import scala.util.Random
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarQuerySuite.scala
similarity index 99%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarQuerySuite.scala
index 6265e40a0a07..25afed25c897 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/InMemoryColumnarQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/InMemoryColumnarQuerySuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.sql.{Date, Timestamp}
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessorSuite.scala
similarity index 96%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessorSuite.scala
index aa1605fee8c7..35dc9a276cef 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnAccessorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnAccessorSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import java.nio.ByteBuffer
 
@@ -38,7 +38,7 @@ object TestNullableColumnAccessor {
 }
 
 class NullableColumnAccessorSuite extends SparkFunSuite {
-  import org.apache.spark.sql.columnar.ColumnarTestUtils._
+  import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 
   Seq(
     NULL, BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilderSuite.scala
similarity index 96%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilderSuite.scala
index 91404577832a..93be3e16a5ed 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/NullableColumnBuilderSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/NullableColumnBuilderSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.CatalystTypeConverters
@@ -36,7 +36,7 @@ object TestNullableColumnBuilder {
 }
 
 class NullableColumnBuilderSuite extends SparkFunSuite {
-  import org.apache.spark.sql.columnar.ColumnarTestUtils._
+  import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 
   Seq(
     BOOLEAN, BYTE, SHORT, INT, LONG, FLOAT, DOUBLE,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/PartitionBatchPruningSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/PartitionBatchPruningSuite.scala
similarity index 99%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/PartitionBatchPruningSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/PartitionBatchPruningSuite.scala
index 6b7401464f46..d762f7bfe914 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/PartitionBatchPruningSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/PartitionBatchPruningSuite.scala
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar
+package org.apache.spark.sql.execution.columnar
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql._
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/BooleanBitSetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/BooleanBitSetSuite.scala
similarity index 94%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/BooleanBitSetSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/BooleanBitSetSuite.scala
index 9a2948c59ba4..ccbddef0fad3 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/BooleanBitSetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/BooleanBitSetSuite.scala
@@ -15,13 +15,13 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.columnar.ColumnarTestUtils._
-import org.apache.spark.sql.columnar.{BOOLEAN, NoopColumnStats}
+import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
+import org.apache.spark.sql.execution.columnar.{BOOLEAN, NoopColumnStats}
 
 class BooleanBitSetSuite extends SparkFunSuite {
   import BooleanBitSet._
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/DictionaryEncodingSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/DictionaryEncodingSuite.scala
similarity index 96%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/DictionaryEncodingSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/DictionaryEncodingSuite.scala
index acfab6586c0d..830ca0294e1b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/DictionaryEncodingSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/DictionaryEncodingSuite.scala
@@ -15,14 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import java.nio.ByteBuffer
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.columnar._
-import org.apache.spark.sql.columnar.ColumnarTestUtils._
+import org.apache.spark.sql.execution.columnar._
+import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 import org.apache.spark.sql.types.AtomicType
 
 class DictionaryEncodingSuite extends SparkFunSuite {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/IntegralDeltaSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/IntegralDeltaSuite.scala
similarity index 96%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/IntegralDeltaSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/IntegralDeltaSuite.scala
index 2111e9fbe62c..988a577a7b4d 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/IntegralDeltaSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/IntegralDeltaSuite.scala
@@ -15,12 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.columnar._
-import org.apache.spark.sql.columnar.ColumnarTestUtils._
+import org.apache.spark.sql.execution.columnar._
+import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 import org.apache.spark.sql.types.IntegralType
 
 class IntegralDeltaSuite extends SparkFunSuite {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/RunLengthEncodingSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/RunLengthEncodingSuite.scala
similarity index 95%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/RunLengthEncodingSuite.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/RunLengthEncodingSuite.scala
index 67ec08f594a4..ce3affba55c7 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/RunLengthEncodingSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/RunLengthEncodingSuite.scala
@@ -15,12 +15,12 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.catalyst.expressions.GenericMutableRow
-import org.apache.spark.sql.columnar._
-import org.apache.spark.sql.columnar.ColumnarTestUtils._
+import org.apache.spark.sql.execution.columnar._
+import org.apache.spark.sql.execution.columnar.ColumnarTestUtils._
 import org.apache.spark.sql.types.AtomicType
 
 class RunLengthEncodingSuite extends SparkFunSuite {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/TestCompressibleColumnBuilder.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/TestCompressibleColumnBuilder.scala
similarity index 93%
rename from sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/TestCompressibleColumnBuilder.scala
rename to sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/TestCompressibleColumnBuilder.scala
index 5268dfe0aa03..5e078f251375 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/columnar/compression/TestCompressibleColumnBuilder.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/columnar/compression/TestCompressibleColumnBuilder.scala
@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql.columnar.compression
+package org.apache.spark.sql.execution.columnar.compression
 
-import org.apache.spark.sql.columnar._
+import org.apache.spark.sql.execution.columnar._
 import org.apache.spark.sql.types.AtomicType
 
 class TestCompressibleColumnBuilder[T <: AtomicType](
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
index 5c2fc7d82ffb..99478e82d419 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/CachedTableSuite.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.hive
 
 import java.io.File
 
-import org.apache.spark.sql.columnar.InMemoryColumnarTableScan
+import org.apache.spark.sql.execution.columnar.InMemoryColumnarTableScan
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.hive.test.TestHiveSingleton
 import org.apache.spark.sql.{AnalysisException, QueryTest, SaveMode}

From 90d384dcbc1d1a3466cf8bae570a26f23012c102 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Thu, 19 Nov 2015 14:49:25 -0800
Subject: [PATCH 805/896] [SPARK-11831][CORE][TESTS] Use port 0 to avoid port
 conflicts in tests

Use port 0 to fix port-contention-related flakiness

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9841 from zsxwing/SPARK-11831.
---
 .../org/apache/spark/rpc/RpcEnvSuite.scala    | 24 +++++++++----------
 .../spark/rpc/akka/AkkaRpcEnvSuite.scala      |  4 ++--
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 834e4743df86..2f55006420ce 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -39,7 +39,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
 
   override def beforeAll(): Unit = {
     val conf = new SparkConf()
-    env = createRpcEnv(conf, "local", 12345)
+    env = createRpcEnv(conf, "local", 0)
   }
 
   override def afterAll(): Unit = {
@@ -76,7 +76,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "send-remotely")
     try {
@@ -130,7 +130,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "ask-remotely")
     try {
@@ -158,7 +158,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     val shortProp = "spark.rpc.short.timeout"
     conf.set("spark.rpc.retry.wait", "0")
     conf.set("spark.rpc.numRetries", "1")
-    val anotherEnv = createRpcEnv(conf, "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(conf, "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "ask-timeout")
     try {
@@ -417,7 +417,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef("local", env.address, "sendWithReply-remotely")
     try {
@@ -457,7 +457,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "sendWithReply-remotely-error")
@@ -497,7 +497,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
 
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "network-events")
@@ -543,7 +543,7 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
       }
     })
 
-    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 13345, clientMode = true)
+    val anotherEnv = createRpcEnv(new SparkConf(), "remote", 0, clientMode = true)
     // Use anotherEnv to find out the RpcEndpointRef
     val rpcEndpointRef = anotherEnv.setupEndpointRef(
       "local", env.address, "sendWithReply-unserializable-error")
@@ -571,8 +571,8 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     conf.set("spark.authenticate", "true")
     conf.set("spark.authenticate.secret", "good")
 
-    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345, clientMode = true)
+    val localEnv = createRpcEnv(conf, "authentication-local", 0)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 0, clientMode = true)
 
     try {
       @volatile var message: String = null
@@ -602,8 +602,8 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     conf.set("spark.authenticate", "true")
     conf.set("spark.authenticate.secret", "good")
 
-    val localEnv = createRpcEnv(conf, "authentication-local", 13345)
-    val remoteEnv = createRpcEnv(conf, "authentication-remote", 14345, clientMode = true)
+    val localEnv = createRpcEnv(conf, "authentication-local", 0)
+    val remoteEnv = createRpcEnv(conf, "authentication-remote", 0, clientMode = true)
 
     try {
       localEnv.setupEndpoint("ask-authentication", new RpcEndpoint {
diff --git a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
index 6478ab51c4da..7aac02775e1b 100644
--- a/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/akka/AkkaRpcEnvSuite.scala
@@ -40,7 +40,7 @@ class AkkaRpcEnvSuite extends RpcEnvSuite {
     })
     val conf = new SparkConf()
     val newRpcEnv = new AkkaRpcEnvFactory().create(
-      RpcEnvConfig(conf, "test", "localhost", 12346, new SecurityManager(conf), false))
+      RpcEnvConfig(conf, "test", "localhost", 0, new SecurityManager(conf), false))
     try {
       val newRef = newRpcEnv.setupEndpointRef("local", ref.address, "test_endpoint")
       assert(s"akka.tcp://local@${env.address}/user/test_endpoint" ===
@@ -59,7 +59,7 @@ class AkkaRpcEnvSuite extends RpcEnvSuite {
     val conf = SSLSampleConfigs.sparkSSLConfig()
     val securityManager = new SecurityManager(conf)
     val rpcEnv = new AkkaRpcEnvFactory().create(
-      RpcEnvConfig(conf, "test", "localhost", 12346, securityManager, false))
+      RpcEnvConfig(conf, "test", "localhost", 0, securityManager, false))
     try {
       val uri = rpcEnv.uriOf("local", RpcAddress("1.2.3.4", 12345), "test_endpoint")
       assert("akka.ssl.tcp://local@1.2.3.4:12345/user/test_endpoint" === uri)

From 3bd77b213a9cd177c3ea3c61d37e5098e55f75a5 Mon Sep 17 00:00:00 2001
From: Srinivasa Reddy Vundela <vsr@cloudera.com>
Date: Thu, 19 Nov 2015 14:51:40 -0800
Subject: [PATCH 806/896] =?UTF-8?q?[SPARK-11799][CORE]=20Make=20it=20expli?=
 =?UTF-8?q?cit=20in=20executor=20logs=20that=20uncaught=20e=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…xceptions are thrown during executor shutdown

This commit will make sure that when uncaught exceptions are prepended with [Container in shutdown] when JVM is shutting down.

Author: Srinivasa Reddy Vundela <vsr@cloudera.com>

Closes #9809 from vundela/master_11799.
---
 .../apache/spark/util/SparkUncaughtExceptionHandler.scala   | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/util/SparkUncaughtExceptionHandler.scala b/core/src/main/scala/org/apache/spark/util/SparkUncaughtExceptionHandler.scala
index 724818724733..5e322557e964 100644
--- a/core/src/main/scala/org/apache/spark/util/SparkUncaughtExceptionHandler.scala
+++ b/core/src/main/scala/org/apache/spark/util/SparkUncaughtExceptionHandler.scala
@@ -29,7 +29,11 @@ private[spark] object SparkUncaughtExceptionHandler
 
   override def uncaughtException(thread: Thread, exception: Throwable) {
     try {
-      logError("Uncaught exception in thread " + thread, exception)
+      // Make it explicit that uncaught exceptions are thrown when container is shutting down.
+      // It will help users when they analyze the executor logs
+      val inShutdownMsg = if (ShutdownHookManager.inShutdown()) "[Container in shutdown] " else ""
+      val errMsg = "Uncaught exception in thread "
+      logError(inShutdownMsg + errMsg + thread, exception)
 
       // We may have been called from a shutdown hook. If so, we must not call System.exit().
       // (If we do, we will deadlock.)

From f7135ed7194d4f936f6f58e14f02b1ed93f68ad1 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 19 Nov 2015 14:53:58 -0800
Subject: [PATCH 807/896] [SPARK-11828][CORE] Register DAGScheduler metrics
 source after app id is known.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9820 from vanzin/SPARK-11828.
---
 core/src/main/scala/org/apache/spark/SparkContext.scala       | 1 +
 .../main/scala/org/apache/spark/scheduler/DAGScheduler.scala  | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index ab374cb71286..af4456c05b0a 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -581,6 +581,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
 
     // Post init
     _taskScheduler.postStartHook()
+    _env.metricsSystem.registerSource(_dagScheduler.metricsSource)
     _env.metricsSystem.registerSource(new BlockManagerSource(_env.blockManager))
     _executorAllocationManager.foreach { e =>
       _env.metricsSystem.registerSource(e.executorAllocationManagerSource)
diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 4a9518fff4e7..ae725b467d8c 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -130,7 +130,7 @@ class DAGScheduler(
 
   def this(sc: SparkContext) = this(sc, sc.taskScheduler)
 
-  private[scheduler] val metricsSource: DAGSchedulerSource = new DAGSchedulerSource(this)
+  private[spark] val metricsSource: DAGSchedulerSource = new DAGSchedulerSource(this)
 
   private[scheduler] val nextJobId = new AtomicInteger(0)
   private[scheduler] def numTotalJobs: Int = nextJobId.get()
@@ -1580,8 +1580,6 @@ class DAGScheduler(
     taskScheduler.stop()
   }
 
-  // Start the event thread and register the metrics source at the end of the constructor
-  env.metricsSystem.registerSource(metricsSource)
   eventProcessLoop.start()
 }
 

From 01403aa97b6aaab9b86ae806b5ea9e82690a741f Mon Sep 17 00:00:00 2001
From: hushan <hushan@xiaomi.com>
Date: Thu, 19 Nov 2015 14:56:00 -0800
Subject: [PATCH 808/896] [SPARK-11746][CORE] Use cache-aware method
 dependencies

a small change

Author: hushan <hushan@xiaomi.com>

Closes #9691 from suyanNone/unify-getDependency.
---
 .../main/scala/org/apache/spark/rdd/PartitionPruningRDD.scala   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/rdd/PartitionPruningRDD.scala b/core/src/main/scala/org/apache/spark/rdd/PartitionPruningRDD.scala
index d6a37e8cc5da..0c6ddda52cee 100644
--- a/core/src/main/scala/org/apache/spark/rdd/PartitionPruningRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/PartitionPruningRDD.scala
@@ -65,7 +65,7 @@ class PartitionPruningRDD[T: ClassTag](
   }
 
   override protected def getPartitions: Array[Partition] =
-    getDependencies.head.asInstanceOf[PruneDependency[T]].partitions
+    dependencies.head.asInstanceOf[PruneDependency[T]].partitions
 }
 
 

From 37cff1b1a79cad11277612cb9bc8bc2365cf5ff2 Mon Sep 17 00:00:00 2001
From: Andrew Ray <ray.andrew@gmail.com>
Date: Thu, 19 Nov 2015 15:11:30 -0800
Subject: [PATCH 809/896] [SPARK-11275][SQL] Incorrect results when using
 rollup/cube

Fixes bug with grouping sets (including cube/rollup) where aggregates that included grouping expressions would return the wrong (null) result.

Also simplifies the analyzer rule a bit and leaves column pruning to the optimizer.

Added multiple unit tests to DataFrameAggregateSuite and verified it passes hive compatibility suite:
```
build/sbt -Phive -Dspark.hive.whitelist='groupby.*_grouping.*' 'test-only org.apache.spark.sql.hive.execution.HiveCompatibilitySuite'
```

This is an alternative to pr https://github.com/apache/spark/pull/9419 but I think its better as it simplifies the analyzer rule instead of adding another special case to it.

Author: Andrew Ray <ray.andrew@gmail.com>

Closes #9815 from aray/groupingset-agg-fix.
---
 .../sql/catalyst/analysis/Analyzer.scala      | 58 +++++++----------
 .../plans/logical/basicOperators.scala        |  4 ++
 .../spark/sql/DataFrameAggregateSuite.scala   | 62 +++++++++++++++++++
 3 files changed, 90 insertions(+), 34 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
index 84781cd57f3d..47962ebe6ef8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
@@ -213,45 +213,35 @@ class Analyzer(
         GroupingSets(bitmasks(a), a.groupByExprs, a.child, a.aggregations)
       case x: GroupingSets =>
         val gid = AttributeReference(VirtualColumn.groupingIdName, IntegerType, false)()
-        // We will insert another Projection if the GROUP BY keys contains the
-        // non-attribute expressions. And the top operators can references those
-        // expressions by its alias.
-        // e.g. SELECT key%5 as c1 FROM src GROUP BY key%5 ==>
-        //      SELECT a as c1 FROM (SELECT key%5 AS a FROM src) GROUP BY a
-
-        // find all of the non-attribute expressions in the GROUP BY keys
-        val nonAttributeGroupByExpressions = new ArrayBuffer[Alias]()
-
-        // The pair of (the original GROUP BY key, associated attribute)
-        val groupByExprPairs = x.groupByExprs.map(_ match {
-          case e: NamedExpression => (e, e.toAttribute)
-          case other => {
-            val alias = Alias(other, other.toString)()
-            nonAttributeGroupByExpressions += alias // add the non-attributes expression alias
-            (other, alias.toAttribute)
-          }
-        })
-
-        // substitute the non-attribute expressions for aggregations.
-        val aggregation = x.aggregations.map(expr => expr.transformDown {
-          case e => groupByExprPairs.find(_._1.semanticEquals(e)).map(_._2).getOrElse(e)
-        }.asInstanceOf[NamedExpression])
 
-        // substitute the group by expressions.
-        val newGroupByExprs = groupByExprPairs.map(_._2)
+        // Expand works by setting grouping expressions to null as determined by the bitmasks. To
+        // prevent these null values from being used in an aggregate instead of the original value
+        // we need to create new aliases for all group by expressions that will only be used for
+        // the intended purpose.
+        val groupByAliases: Seq[Alias] = x.groupByExprs.map {
+          case e: NamedExpression => Alias(e, e.name)()
+          case other => Alias(other, other.toString)()
+        }
 
-        val child = if (nonAttributeGroupByExpressions.length > 0) {
-          // insert additional projection if contains the
-          // non-attribute expressions in the GROUP BY keys
-          Project(x.child.output ++ nonAttributeGroupByExpressions, x.child)
-        } else {
-          x.child
+        val aggregations: Seq[NamedExpression] = x.aggregations.map {
+          // If an expression is an aggregate (contains a AggregateExpression) then we dont change
+          // it so that the aggregation is computed on the unmodified value of its argument
+          // expressions.
+          case expr if expr.find(_.isInstanceOf[AggregateExpression]).nonEmpty => expr
+          // If not then its a grouping expression and we need to use the modified (with nulls from
+          // Expand) value of the expression.
+          case expr => expr.transformDown {
+            case e => groupByAliases.find(_.child.semanticEquals(e)).map(_.toAttribute).getOrElse(e)
+          }.asInstanceOf[NamedExpression]
         }
 
+        val child = Project(x.child.output ++ groupByAliases, x.child)
+        val groupByAttributes = groupByAliases.map(_.toAttribute)
+
         Aggregate(
-          newGroupByExprs :+ VirtualColumn.groupingIdAttribute,
-          aggregation,
-          Expand(x.bitmasks, newGroupByExprs, gid, child))
+          groupByAttributes :+ VirtualColumn.groupingIdAttribute,
+          aggregations,
+          Expand(x.bitmasks, groupByAttributes, gid, child))
     }
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 45630a591d34..0c444482c5e4 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -323,6 +323,10 @@ trait GroupingAnalytics extends UnaryNode {
 
   override def output: Seq[Attribute] = aggregations.map(_.toAttribute)
 
+  // Needs to be unresolved before its translated to Aggregate + Expand because output attributes
+  // will change in analysis.
+  override lazy val resolved: Boolean = false
+
   def withNewAggs(aggs: Seq[NamedExpression]): GroupingAnalytics
 }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
index 71adf2148a40..9c42f65bb6f5 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala
@@ -60,6 +60,68 @@ class DataFrameAggregateSuite extends QueryTest with SharedSQLContext {
     )
   }
 
+  test("rollup") {
+    checkAnswer(
+      courseSales.rollup("course", "year").sum("earnings"),
+      Row("Java", 2012, 20000.0) ::
+        Row("Java", 2013, 30000.0) ::
+        Row("Java", null, 50000.0) ::
+        Row("dotNET", 2012, 15000.0) ::
+        Row("dotNET", 2013, 48000.0) ::
+        Row("dotNET", null, 63000.0) ::
+        Row(null, null, 113000.0) :: Nil
+    )
+  }
+
+  test("cube") {
+    checkAnswer(
+      courseSales.cube("course", "year").sum("earnings"),
+      Row("Java", 2012, 20000.0) ::
+        Row("Java", 2013, 30000.0) ::
+        Row("Java", null, 50000.0) ::
+        Row("dotNET", 2012, 15000.0) ::
+        Row("dotNET", 2013, 48000.0) ::
+        Row("dotNET", null, 63000.0) ::
+        Row(null, 2012, 35000.0) ::
+        Row(null, 2013, 78000.0) ::
+        Row(null, null, 113000.0) :: Nil
+    )
+  }
+
+  test("rollup overlapping columns") {
+    checkAnswer(
+      testData2.rollup($"a" + $"b" as "foo", $"b" as "bar").agg(sum($"a" - $"b") as "foo"),
+      Row(2, 1, 0) :: Row(3, 2, -1) :: Row(3, 1, 1) :: Row(4, 2, 0) :: Row(4, 1, 2) :: Row(5, 2, 1)
+        :: Row(2, null, 0) :: Row(3, null, 0) :: Row(4, null, 2) :: Row(5, null, 1)
+        :: Row(null, null, 3) :: Nil
+    )
+
+    checkAnswer(
+      testData2.rollup("a", "b").agg(sum("b")),
+      Row(1, 1, 1) :: Row(1, 2, 2) :: Row(2, 1, 1) :: Row(2, 2, 2) :: Row(3, 1, 1) :: Row(3, 2, 2)
+        :: Row(1, null, 3) :: Row(2, null, 3) :: Row(3, null, 3)
+        :: Row(null, null, 9) :: Nil
+    )
+  }
+
+  test("cube overlapping columns") {
+    checkAnswer(
+      testData2.cube($"a" + $"b", $"b").agg(sum($"a" - $"b")),
+      Row(2, 1, 0) :: Row(3, 2, -1) :: Row(3, 1, 1) :: Row(4, 2, 0) :: Row(4, 1, 2) :: Row(5, 2, 1)
+        :: Row(2, null, 0) :: Row(3, null, 0) :: Row(4, null, 2) :: Row(5, null, 1)
+        :: Row(null, 1, 3) :: Row(null, 2, 0)
+        :: Row(null, null, 3) :: Nil
+    )
+
+    checkAnswer(
+      testData2.cube("a", "b").agg(sum("b")),
+      Row(1, 1, 1) :: Row(1, 2, 2) :: Row(2, 1, 1) :: Row(2, 2, 2) :: Row(3, 1, 1) :: Row(3, 2, 2)
+        :: Row(1, null, 3) :: Row(2, null, 3) :: Row(3, null, 3)
+        :: Row(null, 1, 3) :: Row(null, 2, 6)
+        :: Row(null, null, 9) :: Nil
+    )
+  }
+
   test("spark.sql.retainGroupColumns config") {
     checkAnswer(
       testData2.groupBy("a").agg(sum($"b")),

From 880128f37e1bc0b9d98d1786670be62a06c648f2 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Thu, 19 Nov 2015 16:49:18 -0800
Subject: [PATCH 810/896] [SPARK-4134][CORE] Lower severity of some executor
 loss logs.

Don't log ERROR messages when executors are explicitly killed or when
the exit reason is not yet known.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9780 from vanzin/SPARK-11789.
---
 .../spark/scheduler/ExecutorLossReason.scala  |  2 +
 .../spark/scheduler/TaskSchedulerImpl.scala   | 44 ++++++++++++-------
 .../spark/scheduler/TaskSetManager.scala      |  1 +
 .../CoarseGrainedSchedulerBackend.scala       | 18 +++++---
 .../spark/deploy/yarn/YarnAllocator.scala     |  4 +-
 5 files changed, 45 insertions(+), 24 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
index 47a5cbff4930..7e1197d74280 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/ExecutorLossReason.scala
@@ -40,6 +40,8 @@ private[spark] object ExecutorExited {
   }
 }
 
+private[spark] object ExecutorKilled extends ExecutorLossReason("Executor killed by driver.")
+
 /**
  * A loss reason that means we don't yet know why the executor exited.
  *
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
index bf0419db1f75..bdf19f9f277d 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala
@@ -470,25 +470,25 @@ private[spark] class TaskSchedulerImpl(
     synchronized {
       if (executorIdToTaskCount.contains(executorId)) {
         val hostPort = executorIdToHost(executorId)
-        logError("Lost executor %s on %s: %s".format(executorId, hostPort, reason))
+        logExecutorLoss(executorId, hostPort, reason)
         removeExecutor(executorId, reason)
         failedExecutor = Some(executorId)
       } else {
-         executorIdToHost.get(executorId) match {
-           case Some(_) =>
-             // If the host mapping still exists, it means we don't know the loss reason for the
-             // executor. So call removeExecutor() to update tasks running on that executor when
-             // the real loss reason is finally known.
-             logError(s"Actual reason for lost executor $executorId: ${reason.message}")
-             removeExecutor(executorId, reason)
-
-           case None =>
-             // We may get multiple executorLost() calls with different loss reasons. For example,
-             // one may be triggered by a dropped connection from the slave while another may be a
-             // report of executor termination from Mesos. We produce log messages for both so we
-             // eventually report the termination reason.
-             logError("Lost an executor " + executorId + " (already removed): " + reason)
-         }
+        executorIdToHost.get(executorId) match {
+          case Some(hostPort) =>
+            // If the host mapping still exists, it means we don't know the loss reason for the
+            // executor. So call removeExecutor() to update tasks running on that executor when
+            // the real loss reason is finally known.
+            logExecutorLoss(executorId, hostPort, reason)
+            removeExecutor(executorId, reason)
+
+          case None =>
+            // We may get multiple executorLost() calls with different loss reasons. For example,
+            // one may be triggered by a dropped connection from the slave while another may be a
+            // report of executor termination from Mesos. We produce log messages for both so we
+            // eventually report the termination reason.
+            logError(s"Lost an executor $executorId (already removed): $reason")
+        }
       }
     }
     // Call dagScheduler.executorLost without holding the lock on this to prevent deadlock
@@ -498,6 +498,18 @@ private[spark] class TaskSchedulerImpl(
     }
   }
 
+  private def logExecutorLoss(
+      executorId: String,
+      hostPort: String,
+      reason: ExecutorLossReason): Unit = reason match {
+    case LossReasonPending =>
+      logDebug(s"Executor $executorId on $hostPort lost, but reason not yet known.")
+    case ExecutorKilled =>
+      logInfo(s"Executor $executorId on $hostPort killed by driver.")
+    case _ =>
+      logError(s"Lost executor $executorId on $hostPort: $reason")
+  }
+
   /**
    * Remove an executor from all our data structures and mark it as lost. If the executor's loss
    * reason is not yet known, do not yet remove its association with its host nor update the status
diff --git a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
index 114468c48c44..a02f3017cb6e 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
@@ -800,6 +800,7 @@ private[spark] class TaskSetManager(
     for ((tid, info) <- taskInfos if info.running && info.executorId == execId) {
       val exitCausedByApp: Boolean = reason match {
         case exited: ExecutorExited => exited.exitCausedByApp
+        case ExecutorKilled => false
         case _ => true
       }
       handleFailedTask(tid, TaskState.FAILED, ExecutorLostFailure(info.executorId, exitCausedByApp,
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index 6f0c910c009a..505c161141c8 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -64,8 +64,10 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
 
   private val listenerBus = scheduler.sc.listenerBus
 
-  // Executors we have requested the cluster manager to kill that have not died yet
-  private val executorsPendingToRemove = new HashSet[String]
+  // Executors we have requested the cluster manager to kill that have not died yet; maps
+  // the executor ID to whether it was explicitly killed by the driver (and thus shouldn't
+  // be considered an app-related failure).
+  private val executorsPendingToRemove = new HashMap[String, Boolean]
 
   // A map to store hostname with its possible task number running on it
   protected var hostToLocalTaskCount: Map[String, Int] = Map.empty
@@ -250,15 +252,15 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
         case Some(executorInfo) =>
           // This must be synchronized because variables mutated
           // in this block are read when requesting executors
-          CoarseGrainedSchedulerBackend.this.synchronized {
+          val killed = CoarseGrainedSchedulerBackend.this.synchronized {
             addressToExecutorId -= executorInfo.executorAddress
             executorDataMap -= executorId
-            executorsPendingToRemove -= executorId
             executorsPendingLossReason -= executorId
+            executorsPendingToRemove.remove(executorId).getOrElse(false)
           }
           totalCoreCount.addAndGet(-executorInfo.totalCores)
           totalRegisteredExecutors.addAndGet(-1)
-          scheduler.executorLost(executorId, reason)
+          scheduler.executorLost(executorId, if (killed) ExecutorKilled else reason)
           listenerBus.post(
             SparkListenerExecutorRemoved(System.currentTimeMillis(), executorId, reason.toString))
         case None => logInfo(s"Asked to remove non-existent executor $executorId")
@@ -459,6 +461,10 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
   /**
    * Request that the cluster manager kill the specified executors.
    *
+   * When asking the executor to be replaced, the executor loss is considered a failure, and
+   * killed tasks that are running on the executor will count towards the failure limits. If no
+   * replacement is being requested, then the tasks will not count towards the limit.
+   *
    * @param executorIds identifiers of executors to kill
    * @param replace whether to replace the killed executors with new ones
    * @param force whether to force kill busy executors
@@ -479,7 +485,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     val executorsToKill = knownExecutors
       .filter { id => !executorsPendingToRemove.contains(id) }
       .filter { id => force || !scheduler.isExecutorBusy(id) }
-    executorsPendingToRemove ++= executorsToKill
+    executorsToKill.foreach { id => executorsPendingToRemove(id) = !replace }
 
     // If we do not wish to replace the executors we kill, sync the target number of executors
     // with the cluster manager to avoid allocating new ones. When computing the new target,
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
index 7e39c3ea56af..73cd9031f025 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala
@@ -481,7 +481,7 @@ private[yarn] class YarnAllocator(
             (true, memLimitExceededLogMessage(
               completedContainer.getDiagnostics,
               PMEM_EXCEEDED_PATTERN))
-          case unknown =>
+          case _ =>
             numExecutorsFailed += 1
             (true, "Container marked as failed: " + containerId + onHostStr +
               ". Exit status: " + completedContainer.getExitStatus +
@@ -493,7 +493,7 @@ private[yarn] class YarnAllocator(
         } else {
           logInfo(containerExitReason)
         }
-        ExecutorExited(0, exitCausedByApp, containerExitReason)
+        ExecutorExited(exitStatus, exitCausedByApp, containerExitReason)
       } else {
         // If we have already released this container, then it must mean
         // that the driver has explicitly requested it to be killed

From b2cecb80ece59a1c086d4ae7aeebef445a4e7299 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Thu, 19 Nov 2015 16:50:08 -0800
Subject: [PATCH 811/896] [SPARK-11845][STREAMING][TEST] Added unit test to
 verify TrackStateRDD is correctly checkpointed

To make sure that all lineage is correctly truncated for TrackStateRDD when checkpointed.

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9831 from tdas/SPARK-11845.
---
 .../org/apache/spark/CheckpointSuite.scala    | 411 +++++++++---------
 .../streaming/rdd/TrackStateRDDSuite.scala    |  60 ++-
 2 files changed, 267 insertions(+), 204 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/CheckpointSuite.scala b/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
index 119e5fc28e41..ab23326c6c25 100644
--- a/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
+++ b/core/src/test/scala/org/apache/spark/CheckpointSuite.scala
@@ -21,17 +21,223 @@ import java.io.File
 
 import scala.reflect.ClassTag
 
+import org.apache.spark.CheckpointSuite._
 import org.apache.spark.rdd._
 import org.apache.spark.storage.{BlockId, StorageLevel, TestBlockId}
 import org.apache.spark.util.Utils
 
+trait RDDCheckpointTester { self: SparkFunSuite =>
+
+  protected val partitioner = new HashPartitioner(2)
+
+  private def defaultCollectFunc[T](rdd: RDD[T]): Any = rdd.collect()
+
+  /** Implementations of this trait must implement this method */
+  protected def sparkContext: SparkContext
+
+  /**
+   * Test checkpointing of the RDD generated by the given operation. It tests whether the
+   * serialized size of the RDD is reduce after checkpointing or not. This function should be called
+   * on all RDDs that have a parent RDD (i.e., do not call on ParallelCollection, BlockRDD, etc.).
+   *
+   * @param op an operation to run on the RDD
+   * @param reliableCheckpoint if true, use reliable checkpoints, otherwise use local checkpoints
+   * @param collectFunc a function for collecting the values in the RDD, in case there are
+   *                    non-comparable types like arrays that we want to convert to something
+   *                    that supports ==
+   */
+  protected def testRDD[U: ClassTag](
+      op: (RDD[Int]) => RDD[U],
+      reliableCheckpoint: Boolean,
+      collectFunc: RDD[U] => Any = defaultCollectFunc[U] _): Unit = {
+    // Generate the final RDD using given RDD operation
+    val baseRDD = generateFatRDD()
+    val operatedRDD = op(baseRDD)
+    val parentRDD = operatedRDD.dependencies.headOption.orNull
+    val rddType = operatedRDD.getClass.getSimpleName
+    val numPartitions = operatedRDD.partitions.length
+
+    // Force initialization of all the data structures in RDDs
+    // Without this, serializing the RDD will give a wrong estimate of the size of the RDD
+    initializeRdd(operatedRDD)
+
+    val partitionsBeforeCheckpoint = operatedRDD.partitions
+
+    // Find serialized sizes before and after the checkpoint
+    logInfo("RDD before checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
+    val (rddSizeBeforeCheckpoint, partitionSizeBeforeCheckpoint) = getSerializedSizes(operatedRDD)
+    checkpoint(operatedRDD, reliableCheckpoint)
+    val result = collectFunc(operatedRDD)
+    operatedRDD.collect() // force re-initialization of post-checkpoint lazy variables
+    val (rddSizeAfterCheckpoint, partitionSizeAfterCheckpoint) = getSerializedSizes(operatedRDD)
+    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
+
+    // Test whether the checkpoint file has been created
+    if (reliableCheckpoint) {
+      assert(
+        collectFunc(sparkContext.checkpointFile[U](operatedRDD.getCheckpointFile.get)) === result)
+    }
+
+    // Test whether dependencies have been changed from its earlier parent RDD
+    assert(operatedRDD.dependencies.head.rdd != parentRDD)
+
+    // Test whether the partitions have been changed from its earlier partitions
+    assert(operatedRDD.partitions.toList != partitionsBeforeCheckpoint.toList)
+
+    // Test whether the partitions have been changed to the new Hadoop partitions
+    assert(operatedRDD.partitions.toList === operatedRDD.checkpointData.get.getPartitions.toList)
+
+    // Test whether the number of partitions is same as before
+    assert(operatedRDD.partitions.length === numPartitions)
+
+    // Test whether the data in the checkpointed RDD is same as original
+    assert(collectFunc(operatedRDD) === result)
+
+    // Test whether serialized size of the RDD has reduced.
+    logInfo("Size of " + rddType +
+      " [" + rddSizeBeforeCheckpoint + " --> " + rddSizeAfterCheckpoint + "]")
+    assert(
+      rddSizeAfterCheckpoint < rddSizeBeforeCheckpoint,
+      "Size of " + rddType + " did not reduce after checkpointing " +
+        " [" + rddSizeBeforeCheckpoint + " --> " + rddSizeAfterCheckpoint + "]"
+    )
+  }
+
+  /**
+   * Test whether checkpointing of the parent of the generated RDD also
+   * truncates the lineage or not. Some RDDs like CoGroupedRDD hold on to its parent
+   * RDDs partitions. So even if the parent RDD is checkpointed and its partitions changed,
+   * the generated RDD will remember the partitions and therefore potentially the whole lineage.
+   * This function should be called only those RDD whose partitions refer to parent RDD's
+   * partitions (i.e., do not call it on simple RDD like MappedRDD).
+   *
+   * @param op an operation to run on the RDD
+   * @param reliableCheckpoint if true, use reliable checkpoints, otherwise use local checkpoints
+   * @param collectFunc a function for collecting the values in the RDD, in case there are
+   *                    non-comparable types like arrays that we want to convert to something
+   *                    that supports ==
+   */
+  protected def testRDDPartitions[U: ClassTag](
+      op: (RDD[Int]) => RDD[U],
+      reliableCheckpoint: Boolean,
+      collectFunc: RDD[U] => Any = defaultCollectFunc[U] _): Unit = {
+    // Generate the final RDD using given RDD operation
+    val baseRDD = generateFatRDD()
+    val operatedRDD = op(baseRDD)
+    val parentRDDs = operatedRDD.dependencies.map(_.rdd)
+    val rddType = operatedRDD.getClass.getSimpleName
+
+    // Force initialization of all the data structures in RDDs
+    // Without this, serializing the RDD will give a wrong estimate of the size of the RDD
+    initializeRdd(operatedRDD)
+
+    // Find serialized sizes before and after the checkpoint
+    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
+    val (rddSizeBeforeCheckpoint, partitionSizeBeforeCheckpoint) = getSerializedSizes(operatedRDD)
+    // checkpoint the parent RDD, not the generated one
+    parentRDDs.foreach { rdd =>
+      checkpoint(rdd, reliableCheckpoint)
+    }
+    val result = collectFunc(operatedRDD) // force checkpointing
+    operatedRDD.collect() // force re-initialization of post-checkpoint lazy variables
+    val (rddSizeAfterCheckpoint, partitionSizeAfterCheckpoint) = getSerializedSizes(operatedRDD)
+    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
+
+    // Test whether the data in the checkpointed RDD is same as original
+    assert(collectFunc(operatedRDD) === result)
+
+    // Test whether serialized size of the partitions has reduced
+    logInfo("Size of partitions of " + rddType +
+      " [" + partitionSizeBeforeCheckpoint + " --> " + partitionSizeAfterCheckpoint + "]")
+    assert(
+      partitionSizeAfterCheckpoint < partitionSizeBeforeCheckpoint,
+      "Size of " + rddType + " partitions did not reduce after checkpointing parent RDDs" +
+        " [" + partitionSizeBeforeCheckpoint + " --> " + partitionSizeAfterCheckpoint + "]"
+    )
+  }
+
+  /**
+   * Get serialized sizes of the RDD and its partitions, in order to test whether the size shrinks
+   * upon checkpointing. Ignores the checkpointData field, which may grow when we checkpoint.
+   */
+  private def getSerializedSizes(rdd: RDD[_]): (Int, Int) = {
+    val rddSize = Utils.serialize(rdd).size
+    val rddCpDataSize = Utils.serialize(rdd.checkpointData).size
+    val rddPartitionSize = Utils.serialize(rdd.partitions).size
+    val rddDependenciesSize = Utils.serialize(rdd.dependencies).size
+
+    // Print detailed size, helps in debugging
+    logInfo("Serialized sizes of " + rdd +
+      ": RDD = " + rddSize +
+      ", RDD checkpoint data = " + rddCpDataSize +
+      ", RDD partitions = " + rddPartitionSize +
+      ", RDD dependencies = " + rddDependenciesSize
+    )
+    // this makes sure that serializing the RDD's checkpoint data does not
+    // serialize the whole RDD as well
+    assert(
+      rddSize > rddCpDataSize,
+      "RDD's checkpoint data (" + rddCpDataSize + ") is equal or larger than the " +
+        "whole RDD with checkpoint data (" + rddSize + ")"
+    )
+    (rddSize - rddCpDataSize, rddPartitionSize)
+  }
+
+  /**
+   * Serialize and deserialize an object. This is useful to verify the objects
+   * contents after deserialization (e.g., the contents of an RDD split after
+   * it is sent to a slave along with a task)
+   */
+  protected def serializeDeserialize[T](obj: T): T = {
+    val bytes = Utils.serialize(obj)
+    Utils.deserialize[T](bytes)
+  }
+
+  /**
+   * Recursively force the initialization of the all members of an RDD and it parents.
+   */
+  private def initializeRdd(rdd: RDD[_]): Unit = {
+    rdd.partitions // forces the initialization of the partitions
+    rdd.dependencies.map(_.rdd).foreach(initializeRdd)
+  }
+
+  /** Checkpoint the RDD either locally or reliably. */
+  protected def checkpoint(rdd: RDD[_], reliableCheckpoint: Boolean): Unit = {
+    if (reliableCheckpoint) {
+      rdd.checkpoint()
+    } else {
+      rdd.localCheckpoint()
+    }
+  }
+
+  /** Run a test twice, once for local checkpointing and once for reliable checkpointing. */
+  protected def runTest(name: String)(body: Boolean => Unit): Unit = {
+    test(name + " [reliable checkpoint]")(body(true))
+    test(name + " [local checkpoint]")(body(false))
+  }
+
+  /**
+   * Generate an RDD such that both the RDD and its partitions have large size.
+   */
+  protected def generateFatRDD(): RDD[Int] = {
+    new FatRDD(sparkContext.makeRDD(1 to 100, 4)).map(x => x)
+  }
+
+  /**
+   * Generate an pair RDD (with partitioner) such that both the RDD and its partitions
+   * have large size.
+   */
+  protected def generateFatPairRDD(): RDD[(Int, Int)] = {
+    new FatPairRDD(sparkContext.makeRDD(1 to 100, 4), partitioner).mapValues(x => x)
+  }
+}
+
 /**
  * Test suite for end-to-end checkpointing functionality.
  * This tests both reliable checkpoints and local checkpoints.
  */
-class CheckpointSuite extends SparkFunSuite with LocalSparkContext with Logging {
+class CheckpointSuite extends SparkFunSuite with RDDCheckpointTester with LocalSparkContext {
   private var checkpointDir: File = _
-  private val partitioner = new HashPartitioner(2)
 
   override def beforeEach(): Unit = {
     super.beforeEach()
@@ -46,6 +252,8 @@ class CheckpointSuite extends SparkFunSuite with LocalSparkContext with Logging
     Utils.deleteRecursively(checkpointDir)
   }
 
+  override def sparkContext: SparkContext = sc
+
   runTest("basic checkpointing") { reliableCheckpoint: Boolean =>
     val parCollection = sc.makeRDD(1 to 4)
     val flatMappedRDD = parCollection.flatMap(x => 1 to x)
@@ -250,204 +458,6 @@ class CheckpointSuite extends SparkFunSuite with LocalSparkContext with Logging
     assert(rdd.isCheckpointedAndMaterialized === true)
     assert(rdd.partitions.size === 0)
   }
-
-  // Utility test methods
-
-  /** Checkpoint the RDD either locally or reliably. */
-  private def checkpoint(rdd: RDD[_], reliableCheckpoint: Boolean): Unit = {
-    if (reliableCheckpoint) {
-      rdd.checkpoint()
-    } else {
-      rdd.localCheckpoint()
-    }
-  }
-
-  /** Run a test twice, once for local checkpointing and once for reliable checkpointing. */
-  private def runTest(name: String)(body: Boolean => Unit): Unit = {
-    test(name + " [reliable checkpoint]")(body(true))
-    test(name + " [local checkpoint]")(body(false))
-  }
-
-  private def defaultCollectFunc[T](rdd: RDD[T]): Any = rdd.collect()
-
-  /**
-   * Test checkpointing of the RDD generated by the given operation. It tests whether the
-   * serialized size of the RDD is reduce after checkpointing or not. This function should be called
-   * on all RDDs that have a parent RDD (i.e., do not call on ParallelCollection, BlockRDD, etc.).
-   *
-   * @param op an operation to run on the RDD
-   * @param reliableCheckpoint if true, use reliable checkpoints, otherwise use local checkpoints
-   * @param collectFunc a function for collecting the values in the RDD, in case there are
-   *   non-comparable types like arrays that we want to convert to something that supports ==
-   */
-  private def testRDD[U: ClassTag](
-      op: (RDD[Int]) => RDD[U],
-      reliableCheckpoint: Boolean,
-      collectFunc: RDD[U] => Any = defaultCollectFunc[U] _): Unit = {
-    // Generate the final RDD using given RDD operation
-    val baseRDD = generateFatRDD()
-    val operatedRDD = op(baseRDD)
-    val parentRDD = operatedRDD.dependencies.headOption.orNull
-    val rddType = operatedRDD.getClass.getSimpleName
-    val numPartitions = operatedRDD.partitions.length
-
-    // Force initialization of all the data structures in RDDs
-    // Without this, serializing the RDD will give a wrong estimate of the size of the RDD
-    initializeRdd(operatedRDD)
-
-    val partitionsBeforeCheckpoint = operatedRDD.partitions
-
-    // Find serialized sizes before and after the checkpoint
-    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
-    val (rddSizeBeforeCheckpoint, partitionSizeBeforeCheckpoint) = getSerializedSizes(operatedRDD)
-    checkpoint(operatedRDD, reliableCheckpoint)
-    val result = collectFunc(operatedRDD)
-    operatedRDD.collect() // force re-initialization of post-checkpoint lazy variables
-    val (rddSizeAfterCheckpoint, partitionSizeAfterCheckpoint) = getSerializedSizes(operatedRDD)
-    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
-
-    // Test whether the checkpoint file has been created
-    if (reliableCheckpoint) {
-      assert(collectFunc(sc.checkpointFile[U](operatedRDD.getCheckpointFile.get)) === result)
-    }
-
-    // Test whether dependencies have been changed from its earlier parent RDD
-    assert(operatedRDD.dependencies.head.rdd != parentRDD)
-
-    // Test whether the partitions have been changed from its earlier partitions
-    assert(operatedRDD.partitions.toList != partitionsBeforeCheckpoint.toList)
-
-    // Test whether the partitions have been changed to the new Hadoop partitions
-    assert(operatedRDD.partitions.toList === operatedRDD.checkpointData.get.getPartitions.toList)
-
-    // Test whether the number of partitions is same as before
-    assert(operatedRDD.partitions.length === numPartitions)
-
-    // Test whether the data in the checkpointed RDD is same as original
-    assert(collectFunc(operatedRDD) === result)
-
-    // Test whether serialized size of the RDD has reduced.
-    logInfo("Size of " + rddType +
-      " [" + rddSizeBeforeCheckpoint + " --> " + rddSizeAfterCheckpoint + "]")
-    assert(
-      rddSizeAfterCheckpoint < rddSizeBeforeCheckpoint,
-      "Size of " + rddType + " did not reduce after checkpointing " +
-        " [" + rddSizeBeforeCheckpoint + " --> " + rddSizeAfterCheckpoint + "]"
-    )
-  }
-
-  /**
-   * Test whether checkpointing of the parent of the generated RDD also
-   * truncates the lineage or not. Some RDDs like CoGroupedRDD hold on to its parent
-   * RDDs partitions. So even if the parent RDD is checkpointed and its partitions changed,
-   * the generated RDD will remember the partitions and therefore potentially the whole lineage.
-   * This function should be called only those RDD whose partitions refer to parent RDD's
-   * partitions (i.e., do not call it on simple RDD like MappedRDD).
-   *
-   * @param op an operation to run on the RDD
-   * @param reliableCheckpoint if true, use reliable checkpoints, otherwise use local checkpoints
-   * @param collectFunc a function for collecting the values in the RDD, in case there are
-   *   non-comparable types like arrays that we want to convert to something that supports ==
-   */
-  private def testRDDPartitions[U: ClassTag](
-      op: (RDD[Int]) => RDD[U],
-      reliableCheckpoint: Boolean,
-      collectFunc: RDD[U] => Any = defaultCollectFunc[U] _): Unit = {
-    // Generate the final RDD using given RDD operation
-    val baseRDD = generateFatRDD()
-    val operatedRDD = op(baseRDD)
-    val parentRDDs = operatedRDD.dependencies.map(_.rdd)
-    val rddType = operatedRDD.getClass.getSimpleName
-
-    // Force initialization of all the data structures in RDDs
-    // Without this, serializing the RDD will give a wrong estimate of the size of the RDD
-    initializeRdd(operatedRDD)
-
-    // Find serialized sizes before and after the checkpoint
-    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
-    val (rddSizeBeforeCheckpoint, partitionSizeBeforeCheckpoint) = getSerializedSizes(operatedRDD)
-    // checkpoint the parent RDD, not the generated one
-    parentRDDs.foreach { rdd =>
-      checkpoint(rdd, reliableCheckpoint)
-    }
-    val result = collectFunc(operatedRDD)  // force checkpointing
-    operatedRDD.collect() // force re-initialization of post-checkpoint lazy variables
-    val (rddSizeAfterCheckpoint, partitionSizeAfterCheckpoint) = getSerializedSizes(operatedRDD)
-    logInfo("RDD after checkpoint: " + operatedRDD + "\n" + operatedRDD.toDebugString)
-
-    // Test whether the data in the checkpointed RDD is same as original
-    assert(collectFunc(operatedRDD) === result)
-
-    // Test whether serialized size of the partitions has reduced
-    logInfo("Size of partitions of " + rddType +
-      " [" + partitionSizeBeforeCheckpoint + " --> " + partitionSizeAfterCheckpoint + "]")
-    assert(
-      partitionSizeAfterCheckpoint < partitionSizeBeforeCheckpoint,
-      "Size of " + rddType + " partitions did not reduce after checkpointing parent RDDs" +
-        " [" + partitionSizeBeforeCheckpoint + " --> " + partitionSizeAfterCheckpoint + "]"
-    )
-  }
-
-  /**
-   * Generate an RDD such that both the RDD and its partitions have large size.
-   */
-  private def generateFatRDD(): RDD[Int] = {
-    new FatRDD(sc.makeRDD(1 to 100, 4)).map(x => x)
-  }
-
-  /**
-   * Generate an pair RDD (with partitioner) such that both the RDD and its partitions
-   * have large size.
-   */
-  private def generateFatPairRDD(): RDD[(Int, Int)] = {
-    new FatPairRDD(sc.makeRDD(1 to 100, 4), partitioner).mapValues(x => x)
-  }
-
-  /**
-   * Get serialized sizes of the RDD and its partitions, in order to test whether the size shrinks
-   * upon checkpointing. Ignores the checkpointData field, which may grow when we checkpoint.
-   */
-  private def getSerializedSizes(rdd: RDD[_]): (Int, Int) = {
-    val rddSize = Utils.serialize(rdd).size
-    val rddCpDataSize = Utils.serialize(rdd.checkpointData).size
-    val rddPartitionSize = Utils.serialize(rdd.partitions).size
-    val rddDependenciesSize = Utils.serialize(rdd.dependencies).size
-
-    // Print detailed size, helps in debugging
-    logInfo("Serialized sizes of " + rdd +
-      ": RDD = " + rddSize +
-      ", RDD checkpoint data = " + rddCpDataSize +
-      ", RDD partitions = " + rddPartitionSize +
-      ", RDD dependencies = " + rddDependenciesSize
-    )
-    // this makes sure that serializing the RDD's checkpoint data does not
-    // serialize the whole RDD as well
-    assert(
-      rddSize > rddCpDataSize,
-      "RDD's checkpoint data (" + rddCpDataSize  + ") is equal or larger than the " +
-        "whole RDD with checkpoint data (" + rddSize + ")"
-    )
-    (rddSize - rddCpDataSize, rddPartitionSize)
-  }
-
-  /**
-   * Serialize and deserialize an object. This is useful to verify the objects
-   * contents after deserialization (e.g., the contents of an RDD split after
-   * it is sent to a slave along with a task)
-   */
-  private def serializeDeserialize[T](obj: T): T = {
-    val bytes = Utils.serialize(obj)
-    Utils.deserialize[T](bytes)
-  }
-
-  /**
-   * Recursively force the initialization of the all members of an RDD and it parents.
-   */
-  private def initializeRdd(rdd: RDD[_]): Unit = {
-    rdd.partitions // forces the
-    rdd.dependencies.map(_.rdd).foreach(initializeRdd)
-  }
-
 }
 
 /** RDD partition that has large serialized size. */
@@ -494,5 +504,4 @@ object CheckpointSuite {
       part
     ).asInstanceOf[RDD[(K, Array[Iterable[V]])]]
   }
-
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
index 19ef5a14f8ab..0feb3af1abb0 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
@@ -17,31 +17,40 @@
 
 package org.apache.spark.streaming.rdd
 
+import java.io.File
+
 import scala.collection.mutable.ArrayBuffer
 import scala.reflect.ClassTag
 
 import org.scalatest.BeforeAndAfterAll
 
+import org.apache.spark._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.streaming.util.OpenHashMapBasedStateMap
-import org.apache.spark.streaming.{Time, State}
-import org.apache.spark.{HashPartitioner, SparkConf, SparkContext, SparkFunSuite}
+import org.apache.spark.streaming.{State, Time}
+import org.apache.spark.util.Utils
 
-class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
+class TrackStateRDDSuite extends SparkFunSuite with RDDCheckpointTester with BeforeAndAfterAll {
 
   private var sc: SparkContext = null
+  private var checkpointDir: File = _
 
   override def beforeAll(): Unit = {
     sc = new SparkContext(
       new SparkConf().setMaster("local").setAppName("TrackStateRDDSuite"))
+    checkpointDir = Utils.createTempDir()
+    sc.setCheckpointDir(checkpointDir.toString)
   }
 
   override def afterAll(): Unit = {
     if (sc != null) {
       sc.stop()
     }
+    Utils.deleteRecursively(checkpointDir)
   }
 
+  override def sparkContext: SparkContext = sc
+
   test("creation from pair RDD") {
     val data = Seq((1, "1"), (2, "2"), (3, "3"))
     val partitioner = new HashPartitioner(10)
@@ -278,6 +287,51 @@ class TrackStateRDDSuite extends SparkFunSuite with BeforeAndAfterAll {
       rdd7, Seq(("k3", 2)), Set())
   }
 
+  test("checkpointing") {
+    /**
+     * This tests whether the TrackStateRDD correctly truncates any references to its parent RDDs -
+     * the data RDD and the parent TrackStateRDD.
+     */
+    def rddCollectFunc(rdd: RDD[TrackStateRDDRecord[Int, Int, Int]])
+      : Set[(List[(Int, Int, Long)], List[Int])] = {
+      rdd.map { record => (record.stateMap.getAll().toList, record.emittedRecords.toList) }
+         .collect.toSet
+    }
+
+    /** Generate TrackStateRDD with data RDD having a long lineage */
+    def makeStateRDDWithLongLineageDataRDD(longLineageRDD: RDD[Int])
+      : TrackStateRDD[Int, Int, Int, Int] = {
+      TrackStateRDD.createFromPairRDD(longLineageRDD.map { _ -> 1}, partitioner, Time(0))
+    }
+
+    testRDD(
+      makeStateRDDWithLongLineageDataRDD, reliableCheckpoint = true, rddCollectFunc _)
+    testRDDPartitions(
+      makeStateRDDWithLongLineageDataRDD, reliableCheckpoint = true, rddCollectFunc _)
+
+    /** Generate TrackStateRDD with parent state RDD having a long lineage */
+    def makeStateRDDWithLongLineageParenttateRDD(
+        longLineageRDD: RDD[Int]): TrackStateRDD[Int, Int, Int, Int] = {
+
+      // Create a TrackStateRDD that has a long lineage using the data RDD with a long lineage
+      val stateRDDWithLongLineage = makeStateRDDWithLongLineageDataRDD(longLineageRDD)
+
+      // Create a new TrackStateRDD, with the lineage lineage TrackStateRDD as the parent
+      new TrackStateRDD[Int, Int, Int, Int](
+        stateRDDWithLongLineage,
+        stateRDDWithLongLineage.sparkContext.emptyRDD[(Int, Int)].partitionBy(partitioner),
+        (time: Time, key: Int, value: Option[Int], state: State[Int]) => None,
+        Time(10),
+        None
+      )
+    }
+
+    testRDD(
+      makeStateRDDWithLongLineageParenttateRDD, reliableCheckpoint = true, rddCollectFunc _)
+    testRDDPartitions(
+      makeStateRDDWithLongLineageParenttateRDD, reliableCheckpoint = true, rddCollectFunc _)
+  }
+
   /** Assert whether the `trackStateByKey` operation generates expected results */
   private def assertOperation[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
       testStateRDD: TrackStateRDD[K, V, S, T],

From ee21407747fb00db2f26d1119446ccbb20c19232 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Thu, 19 Nov 2015 17:14:10 -0800
Subject: [PATCH 812/896] [SPARK-11864][SQL] Improve performance of max/min

This PR has the following optimization:

1) The greatest/least already does the null-check, so the `If` and `IsNull` are not necessary.

2) In greatest/least, it should initialize the result using the first child (removing one block).

3) For primitive types, the generated greater expression is too complicated (`a > b ? 1 : (a < b) ? -1 : 0) > 0`), should be as simple as `a > b`

Combine these optimization, this could improve the performance of `ss_max` query by 30%.

Author: Davies Liu <davies@databricks.com>

Closes #9846 from davies/improve_max.
---
 .../catalyst/expressions/aggregate/Max.scala  |  5 +--
 .../catalyst/expressions/aggregate/Min.scala  |  5 +--
 .../expressions/codegen/CodeGenerator.scala   | 12 ++++++
 .../expressions/conditionalExpressions.scala  | 38 +++++++++++--------
 .../expressions/nullExpressions.scala         | 10 +++--
 5 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
index 61cae44cd0f5..906003188d4f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Max.scala
@@ -46,13 +46,12 @@ case class Max(child: Expression) extends DeclarativeAggregate {
   )
 
   override lazy val updateExpressions: Seq[Expression] = Seq(
-    /* max = */ If(IsNull(child), max, If(IsNull(max), child, Greatest(Seq(max, child))))
+    /* max = */ Greatest(Seq(max, child))
   )
 
   override lazy val mergeExpressions: Seq[Expression] = {
-    val greatest = Greatest(Seq(max.left, max.right))
     Seq(
-      /* max = */ If(IsNull(max.right), max.left, If(IsNull(max.left), max.right, greatest))
+      /* max = */ Greatest(Seq(max.left, max.right))
     )
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
index 242456d9e2e1..39f7afbd081c 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Min.scala
@@ -47,13 +47,12 @@ case class Min(child: Expression) extends DeclarativeAggregate {
   )
 
   override lazy val updateExpressions: Seq[Expression] = Seq(
-    /* min = */ If(IsNull(child), min, If(IsNull(min), child, Least(Seq(min, child))))
+    /* min = */ Least(Seq(min, child))
   )
 
   override lazy val mergeExpressions: Seq[Expression] = {
-    val least = Least(Seq(min.left, min.right))
     Seq(
-      /* min = */ If(IsNull(min.right), min.left, If(IsNull(min.left), min.right, least))
+      /* min = */ Least(Seq(min.left, min.right))
     )
   }
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 1718cfbd3533..1b7260cdfe51 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -329,6 +329,18 @@ class CodeGenContext {
       throw new IllegalArgumentException("cannot generate compare code for un-comparable type")
   }
 
+  /**
+    * Generates code for greater of two expressions.
+    *
+    * @param dataType data type of the expressions
+    * @param c1 name of the variable of expression 1's output
+    * @param c2 name of the variable of expression 2's output
+    */
+  def genGreater(dataType: DataType, c1: String, c2: String): String = javaType(dataType) match {
+    case JAVA_BYTE | JAVA_SHORT | JAVA_INT | JAVA_LONG => s"$c1 > $c2"
+    case _ => s"(${genComp(dataType, c1, c2)}) > 0"
+  }
+
   /**
    * List of java data types that have special accessors and setters in [[InternalRow]].
    */
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
index 0d4af43978ea..694a2a7c54a9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/conditionalExpressions.scala
@@ -348,19 +348,22 @@ case class Least(children: Seq[Expression]) extends Expression {
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val evalChildren = children.map(_.gen(ctx))
-    def updateEval(i: Int): String =
+    val first = evalChildren(0)
+    val rest = evalChildren.drop(1)
+    def updateEval(eval: GeneratedExpressionCode): String =
       s"""
-        if (!${evalChildren(i).isNull} && (${ev.isNull} ||
-          ${ctx.genComp(dataType, evalChildren(i).value, ev.value)} < 0)) {
+        ${eval.code}
+        if (!${eval.isNull} && (${ev.isNull} ||
+          ${ctx.genGreater(dataType, ev.value, eval.value)})) {
           ${ev.isNull} = false;
-          ${ev.value} = ${evalChildren(i).value};
+          ${ev.value} = ${eval.value};
         }
       """
     s"""
-      ${evalChildren.map(_.code).mkString("\n")}
-      boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
-      ${children.indices.map(updateEval).mkString("\n")}
+      ${first.code}
+      boolean ${ev.isNull} = ${first.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${first.value};
+      ${rest.map(updateEval).mkString("\n")}
     """
   }
 }
@@ -403,19 +406,22 @@ case class Greatest(children: Seq[Expression]) extends Expression {
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     val evalChildren = children.map(_.gen(ctx))
-    def updateEval(i: Int): String =
+    val first = evalChildren(0)
+    val rest = evalChildren.drop(1)
+    def updateEval(eval: GeneratedExpressionCode): String =
       s"""
-        if (!${evalChildren(i).isNull} && (${ev.isNull} ||
-          ${ctx.genComp(dataType, evalChildren(i).value, ev.value)} > 0)) {
+        ${eval.code}
+        if (!${eval.isNull} && (${ev.isNull} ||
+          ${ctx.genGreater(dataType, eval.value, ev.value)})) {
           ${ev.isNull} = false;
-          ${ev.value} = ${evalChildren(i).value};
+          ${ev.value} = ${eval.value};
         }
       """
     s"""
-      ${evalChildren.map(_.code).mkString("\n")}
-      boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
-      ${children.indices.map(updateEval).mkString("\n")}
+      ${first.code}
+      boolean ${ev.isNull} = ${first.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${first.value};
+      ${rest.map(updateEval).mkString("\n")}
     """
   }
 }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
index 94deafb75b69..df4747d4e6f7 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/nullExpressions.scala
@@ -62,11 +62,15 @@ case class Coalesce(children: Seq[Expression]) extends Expression {
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
+    val first = children(0)
+    val rest = children.drop(1)
+    val firstEval = first.gen(ctx)
     s"""
-      boolean ${ev.isNull} = true;
-      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
+      ${firstEval.code}
+      boolean ${ev.isNull} = ${firstEval.isNull};
+      ${ctx.javaType(dataType)} ${ev.value} = ${firstEval.value};
     """ +
-    children.map { e =>
+      rest.map { e =>
       val eval = e.gen(ctx)
       s"""
         if (${ev.isNull}) {

From 7ee7d5a3c4ff77d2cee2afce36ff41f6302e6315 Mon Sep 17 00:00:00 2001
From: Dilip Biswal <dbiswal@us.ibm.com>
Date: Thu, 19 Nov 2015 19:46:10 -0800
Subject: [PATCH 813/896] [SPARK-11544][SQL][TEST-HADOOP1.0] sqlContext doesn't
 use PathFilter

Apply the user supplied pathfilter while retrieving the files from fs.

Author: Dilip Biswal <dbiswal@us.ibm.com>

Closes #9830 from dilipbiswal/spark-11544.
---
 .../apache/spark/sql/sources/interfaces.scala | 25 ++++++++---
 .../datasources/json/JsonSuite.scala          | 41 ++++++++++++++++++-
 2 files changed, 59 insertions(+), 7 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
index b3d3bdf50df6..f9465157c936 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala
@@ -21,7 +21,8 @@ import scala.collection.mutable
 import scala.util.Try
 
 import org.apache.hadoop.conf.Configuration
-import org.apache.hadoop.fs.{FileStatus, FileSystem, Path}
+import org.apache.hadoop.fs.{PathFilter, FileStatus, FileSystem, Path}
+import org.apache.hadoop.mapred.{JobConf, FileInputFormat}
 import org.apache.hadoop.mapreduce.{Job, TaskAttemptContext}
 
 import org.apache.spark.{Logging, SparkContext}
@@ -447,9 +448,15 @@ abstract class HadoopFsRelation private[sql](
           val hdfsPath = new Path(path)
           val fs = hdfsPath.getFileSystem(hadoopConf)
           val qualified = hdfsPath.makeQualified(fs.getUri, fs.getWorkingDirectory)
-
           logInfo(s"Listing $qualified on driver")
-          Try(fs.listStatus(qualified)).getOrElse(Array.empty)
+          // Dummy jobconf to get to the pathFilter defined in configuration
+          val jobConf = new JobConf(hadoopConf, this.getClass())
+          val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
+          if (pathFilter != null) {
+            Try(fs.listStatus(qualified, pathFilter)).getOrElse(Array.empty)
+          } else {
+            Try(fs.listStatus(qualified)).getOrElse(Array.empty)
+          }
         }.filterNot { status =>
           val name = status.getPath.getName
           name.toLowerCase == "_temporary" || name.startsWith(".")
@@ -847,8 +854,16 @@ private[sql] object HadoopFsRelation extends Logging {
     if (name == "_temporary" || name.startsWith(".")) {
       Array.empty
     } else {
-      val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
-      files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      // Dummy jobconf to get to the pathFilter defined in configuration
+      val jobConf = new JobConf(fs.getConf, this.getClass())
+      val pathFilter = FileInputFormat.getInputPathFilter(jobConf)
+      if (pathFilter != null) {
+        val (dirs, files) = fs.listStatus(status.getPath, pathFilter).partition(_.isDir)
+        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      } else {
+        val (dirs, files) = fs.listStatus(status.getPath).partition(_.isDir)
+        files ++ dirs.flatMap(dir => listLeafFiles(fs, dir))
+      }
     }
   }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
index 6042b1178aff..ba7718c86463 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonSuite.scala
@@ -19,19 +19,27 @@ package org.apache.spark.sql.execution.datasources.json
 
 import java.io.{File, StringWriter}
 import java.sql.{Date, Timestamp}
+import scala.collection.JavaConverters._
 
 import com.fasterxml.jackson.core.JsonFactory
-import org.apache.spark.rdd.RDD
+import org.apache.commons.io.FileUtils
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.fs.{Path, PathFilter}
 import org.scalactic.Tolerance._
 
+import org.apache.spark.rdd.RDD
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.util.DateTimeUtils
-import org.apache.spark.sql.execution.datasources.{ResolvedDataSource, LogicalRelation}
+import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.execution.datasources.json.InferSchema.compatibleType
 import org.apache.spark.sql.test.SharedSQLContext
 import org.apache.spark.sql.types._
 import org.apache.spark.util.Utils
 
+class TestFileFilter extends PathFilter {
+  override def accept(path: Path): Boolean = path.getParent.getName != "p=2"
+}
+
 class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
   import testImplicits._
 
@@ -1390,4 +1398,33 @@ class JsonSuite extends QueryTest with SharedSQLContext with TestJsonData {
       )
     }
   }
+
+  test("SPARK-11544 test pathfilter") {
+    withTempPath { dir =>
+      val path = dir.getCanonicalPath
+
+      val df = sqlContext.range(2)
+      df.write.json(path + "/p=1")
+      df.write.json(path + "/p=2")
+      assert(sqlContext.read.json(path).count() === 4)
+
+      val clonedConf = new Configuration(hadoopConfiguration)
+      try {
+        // Setting it twice as the name of the propery has changed between hadoop versions.
+        hadoopConfiguration.setClass(
+          "mapred.input.pathFilter.class",
+          classOf[TestFileFilter],
+          classOf[PathFilter])
+        hadoopConfiguration.setClass(
+          "mapreduce.input.pathFilter.class",
+          classOf[TestFileFilter],
+          classOf[PathFilter])
+        assert(sqlContext.read.json(path).count() === 2)
+      } finally {
+        // Hadoop 1 doesn't have `Configuration.unset`
+        hadoopConfiguration.clear()
+        clonedConf.asScala.foreach(entry => hadoopConfiguration.set(entry.getKey, entry.getValue))
+      }
+    }
+  }
 }

From 4114ce20fbe820f111e55e891ae3889b0e6e0006 Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Thu, 19 Nov 2015 22:01:02 -0800
Subject: [PATCH 814/896] [SPARK-11846] Add save/load for AFTSurvivalRegression
 and IsotonicRegression

https://issues.apache.org/jira/browse/SPARK-11846

mengxr

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9836 from yinxusen/SPARK-11846.
---
 .../ml/regression/AFTSurvivalRegression.scala | 78 +++++++++++++++--
 .../ml/regression/IsotonicRegression.scala    | 83 +++++++++++++++++--
 .../AFTSurvivalRegressionSuite.scala          | 37 ++++++++-
 .../regression/IsotonicRegressionSuite.scala  | 34 +++++++-
 4 files changed, 210 insertions(+), 22 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
index b7d095872ffa..aedfb48058dc 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/AFTSurvivalRegression.scala
@@ -21,20 +21,20 @@ import scala.collection.mutable
 
 import breeze.linalg.{DenseVector => BDV}
 import breeze.optimize.{CachedDiffFunction, DiffFunction, LBFGS => BreezeLBFGS}
+import org.apache.hadoop.fs.Path
 
-import org.apache.spark.{SparkException, Logging}
-import org.apache.spark.annotation.{Since, Experimental}
-import org.apache.spark.ml.{Model, Estimator}
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
-import org.apache.spark.mllib.linalg.{Vector, Vectors, VectorUDT}
-import org.apache.spark.mllib.linalg.BLAS
+import org.apache.spark.ml.util._
+import org.apache.spark.ml.{Estimator, Model}
+import org.apache.spark.mllib.linalg.{BLAS, Vector, VectorUDT, Vectors}
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{Row, DataFrame}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types.{DoubleType, StructType}
+import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.storage.StorageLevel
+import org.apache.spark.{Logging, SparkException}
 
 /**
  * Params for accelerated failure time (AFT) regression.
@@ -120,7 +120,8 @@ private[regression] trait AFTSurvivalRegressionParams extends Params
 @Experimental
 @Since("1.6.0")
 class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: String)
-  extends Estimator[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams with Logging {
+  extends Estimator[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams
+  with DefaultParamsWritable with Logging {
 
   @Since("1.6.0")
   def this() = this(Identifiable.randomUID("aftSurvReg"))
@@ -243,6 +244,13 @@ class AFTSurvivalRegression @Since("1.6.0") (@Since("1.6.0") override val uid: S
   override def copy(extra: ParamMap): AFTSurvivalRegression = defaultCopy(extra)
 }
 
+@Since("1.6.0")
+object AFTSurvivalRegression extends DefaultParamsReadable[AFTSurvivalRegression] {
+
+  @Since("1.6.0")
+  override def load(path: String): AFTSurvivalRegression = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model produced by [[AFTSurvivalRegression]].
@@ -254,7 +262,7 @@ class AFTSurvivalRegressionModel private[ml] (
     @Since("1.6.0") val coefficients: Vector,
     @Since("1.6.0") val intercept: Double,
     @Since("1.6.0") val scale: Double)
-  extends Model[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams {
+  extends Model[AFTSurvivalRegressionModel] with AFTSurvivalRegressionParams with MLWritable {
 
   /** @group setParam */
   @Since("1.6.0")
@@ -312,6 +320,58 @@ class AFTSurvivalRegressionModel private[ml] (
     copyValues(new AFTSurvivalRegressionModel(uid, coefficients, intercept, scale), extra)
       .setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter =
+    new AFTSurvivalRegressionModel.AFTSurvivalRegressionModelWriter(this)
+}
+
+@Since("1.6.0")
+object AFTSurvivalRegressionModel extends MLReadable[AFTSurvivalRegressionModel] {
+
+  @Since("1.6.0")
+  override def read: MLReader[AFTSurvivalRegressionModel] = new AFTSurvivalRegressionModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): AFTSurvivalRegressionModel = super.load(path)
+
+  /** [[MLWriter]] instance for [[AFTSurvivalRegressionModel]] */
+  private[AFTSurvivalRegressionModel] class AFTSurvivalRegressionModelWriter (
+      instance: AFTSurvivalRegressionModel
+    ) extends MLWriter with Logging {
+
+    private case class Data(coefficients: Vector, intercept: Double, scale: Double)
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: coefficients, intercept, scale
+      val data = Data(instance.coefficients, instance.intercept, instance.scale)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class AFTSurvivalRegressionModelReader extends MLReader[AFTSurvivalRegressionModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[AFTSurvivalRegressionModel].getName
+
+    override def load(path: String): AFTSurvivalRegressionModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("coefficients", "intercept", "scale").head()
+      val coefficients = data.getAs[Vector](0)
+      val intercept = data.getDouble(1)
+      val scale = data.getDouble(2)
+      val model = new AFTSurvivalRegressionModel(metadata.uid, coefficients, intercept, scale)
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
 }
 
 /**
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
index a1fe01b04710..bbb1c7ac0a51 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/IsotonicRegression.scala
@@ -17,18 +17,22 @@
 
 package org.apache.spark.ml.regression
 
+import org.apache.hadoop.fs.Path
+
 import org.apache.spark.Logging
 import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
-import org.apache.spark.ml.param.shared.{HasFeaturesCol, HasLabelCol, HasPredictionCol, HasWeightCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.param.shared._
+import org.apache.spark.ml.regression.IsotonicRegressionModel.IsotonicRegressionModelWriter
+import org.apache.spark.ml.util._
+import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT, Vectors}
-import org.apache.spark.mllib.regression.{IsotonicRegression => MLlibIsotonicRegression, IsotonicRegressionModel => MLlibIsotonicRegressionModel}
+import org.apache.spark.mllib.regression.{IsotonicRegression => MLlibIsotonicRegression}
+import org.apache.spark.mllib.regression.{IsotonicRegressionModel => MLlibIsotonicRegressionModel}
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.sql.functions.{col, lit, udf}
 import org.apache.spark.sql.types.{DoubleType, StructType}
+import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.storage.StorageLevel
 
 /**
@@ -127,7 +131,8 @@ private[regression] trait IsotonicRegressionBase extends Params with HasFeatures
 @Since("1.5.0")
 @Experimental
 class IsotonicRegression @Since("1.5.0") (@Since("1.5.0") override val uid: String)
-  extends Estimator[IsotonicRegressionModel] with IsotonicRegressionBase {
+  extends Estimator[IsotonicRegressionModel]
+  with IsotonicRegressionBase with DefaultParamsWritable {
 
   @Since("1.5.0")
   def this() = this(Identifiable.randomUID("isoReg"))
@@ -179,6 +184,13 @@ class IsotonicRegression @Since("1.5.0") (@Since("1.5.0") override val uid: Stri
   }
 }
 
+@Since("1.6.0")
+object IsotonicRegression extends DefaultParamsReadable[IsotonicRegression] {
+
+  @Since("1.6.0")
+  override def load(path: String): IsotonicRegression = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model fitted by IsotonicRegression.
@@ -194,7 +206,7 @@ class IsotonicRegression @Since("1.5.0") (@Since("1.5.0") override val uid: Stri
 class IsotonicRegressionModel private[ml] (
     override val uid: String,
     private val oldModel: MLlibIsotonicRegressionModel)
-  extends Model[IsotonicRegressionModel] with IsotonicRegressionBase {
+  extends Model[IsotonicRegressionModel] with IsotonicRegressionBase with MLWritable {
 
   /** @group setParam */
   @Since("1.5.0")
@@ -240,4 +252,61 @@ class IsotonicRegressionModel private[ml] (
   override def transformSchema(schema: StructType): StructType = {
     validateAndTransformSchema(schema, fitting = false)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter =
+    new IsotonicRegressionModelWriter(this)
+}
+
+@Since("1.6.0")
+object IsotonicRegressionModel extends MLReadable[IsotonicRegressionModel] {
+
+  @Since("1.6.0")
+  override def read: MLReader[IsotonicRegressionModel] = new IsotonicRegressionModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): IsotonicRegressionModel = super.load(path)
+
+  /** [[MLWriter]] instance for [[IsotonicRegressionModel]] */
+  private[IsotonicRegressionModel] class IsotonicRegressionModelWriter (
+      instance: IsotonicRegressionModel
+    ) extends MLWriter with Logging {
+
+    private case class Data(
+        boundaries: Array[Double],
+        predictions: Array[Double],
+        isotonic: Boolean)
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: boundaries, predictions, isotonic
+      val data = Data(
+        instance.oldModel.boundaries, instance.oldModel.predictions, instance.oldModel.isotonic)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class IsotonicRegressionModelReader extends MLReader[IsotonicRegressionModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[IsotonicRegressionModel].getName
+
+    override def load(path: String): IsotonicRegressionModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("boundaries", "predictions", "isotonic").head()
+      val boundaries = data.getAs[Seq[Double]](0).toArray
+      val predictions = data.getAs[Seq[Double]](1).toArray
+      val isotonic = data.getBoolean(2)
+      val model = new IsotonicRegressionModel(
+        metadata.uid, new MLlibIsotonicRegressionModel(boundaries, predictions, isotonic))
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
index 359f31027172..d718ef63b531 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/AFTSurvivalRegressionSuite.scala
@@ -21,14 +21,15 @@ import scala.util.Random
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.random.{ExponentialGenerator, WeibullGenerator}
-import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.mllib.util.MLlibTestSparkContext
-import org.apache.spark.sql.{Row, DataFrame}
+import org.apache.spark.mllib.util.TestingUtils._
+import org.apache.spark.sql.{DataFrame, Row}
 
-class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class AFTSurvivalRegressionSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   @transient var datasetUnivariate: DataFrame = _
   @transient var datasetMultivariate: DataFrame = _
@@ -332,4 +333,32 @@ class AFTSurvivalRegressionSuite extends SparkFunSuite with MLlibTestSparkContex
           assert(prediction ~== model.predict(features) relTol 1E-5)
     }
   }
+
+  test("read/write") {
+    def checkModelData(
+        model: AFTSurvivalRegressionModel,
+        model2: AFTSurvivalRegressionModel): Unit = {
+      assert(model.intercept === model2.intercept)
+      assert(model.coefficients === model2.coefficients)
+      assert(model.scale === model2.scale)
+    }
+    val aft = new AFTSurvivalRegression()
+    testEstimatorAndModelReadWrite(aft, datasetMultivariate,
+      AFTSurvivalRegressionSuite.allParamSettings, checkModelData)
+  }
+}
+
+object AFTSurvivalRegressionSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "fitIntercept" -> true,
+    "maxIter" -> 2,
+    "tol" -> 0.01
+  )
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/regression/IsotonicRegressionSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/regression/IsotonicRegressionSuite.scala
index 59f4193abc8f..f067c29d27a7 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/regression/IsotonicRegressionSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/regression/IsotonicRegressionSuite.scala
@@ -19,12 +19,14 @@ package org.apache.spark.ml.regression
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.sql.{DataFrame, Row}
 
-class IsotonicRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
+class IsotonicRegressionSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
+
   private def generateIsotonicInput(labels: Seq[Double]): DataFrame = {
     sqlContext.createDataFrame(
       labels.zipWithIndex.map { case (label, i) => (label, i.toDouble, 1.0) }
@@ -164,4 +166,32 @@ class IsotonicRegressionSuite extends SparkFunSuite with MLlibTestSparkContext {
 
     assert(predictions === Array(3.5, 5.0, 5.0, 5.0))
   }
+
+  test("read/write") {
+    val dataset = generateIsotonicInput(Seq(1, 2, 3, 1, 6, 17, 16, 17, 18))
+
+    def checkModelData(model: IsotonicRegressionModel, model2: IsotonicRegressionModel): Unit = {
+      assert(model.boundaries === model2.boundaries)
+      assert(model.predictions === model2.predictions)
+      assert(model.isotonic === model2.isotonic)
+    }
+
+    val ir = new IsotonicRegression()
+    testEstimatorAndModelReadWrite(ir, dataset, IsotonicRegressionSuite.allParamSettings,
+      checkModelData)
+  }
+}
+
+object IsotonicRegressionSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "isotonic" -> true,
+    "featureIndex" -> 0
+  )
 }

From 3b7f056da87a23f3a96f0311b3a947a9b698f38b Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 19 Nov 2015 22:02:17 -0800
Subject: [PATCH 815/896] [SPARK-11829][ML] Add read/write to estimators under
 ml.feature (II)

Add read/write support to the following estimators under spark.ml:
* ChiSqSelector
* PCA
* VectorIndexer
* Word2Vec

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9838 from yanboliang/spark-11829.
---
 .../spark/ml/feature/ChiSqSelector.scala      | 65 ++++++++++++++++--
 .../org/apache/spark/ml/feature/PCA.scala     | 67 +++++++++++++++++--
 .../spark/ml/feature/VectorIndexer.scala      | 66 ++++++++++++++++--
 .../apache/spark/ml/feature/Word2Vec.scala    | 67 +++++++++++++++++--
 .../apache/spark/mllib/feature/Word2Vec.scala |  6 +-
 .../spark/ml/feature/ChiSqSelectorSuite.scala | 22 +++++-
 .../apache/spark/ml/feature/PCASuite.scala    | 26 ++++++-
 .../spark/ml/feature/VectorIndexerSuite.scala | 22 +++++-
 .../spark/ml/feature/Word2VecSuite.scala      | 30 ++++++++-
 9 files changed, 338 insertions(+), 33 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
index 5e4061fba549..dfec03828f4b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/ChiSqSelector.scala
@@ -17,13 +17,14 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml._
 import org.apache.spark.ml.attribute.{AttributeGroup, _}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
-import org.apache.spark.ml.util.SchemaUtils
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
 import org.apache.spark.mllib.regression.LabeledPoint
@@ -60,7 +61,7 @@ private[feature] trait ChiSqSelectorParams extends Params
  */
 @Experimental
 final class ChiSqSelector(override val uid: String)
-  extends Estimator[ChiSqSelectorModel] with ChiSqSelectorParams {
+  extends Estimator[ChiSqSelectorModel] with ChiSqSelectorParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("chiSqSelector"))
 
@@ -95,6 +96,13 @@ final class ChiSqSelector(override val uid: String)
   override def copy(extra: ParamMap): ChiSqSelector = defaultCopy(extra)
 }
 
+@Since("1.6.0")
+object ChiSqSelector extends DefaultParamsReadable[ChiSqSelector] {
+
+  @Since("1.6.0")
+  override def load(path: String): ChiSqSelector = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model fitted by [[ChiSqSelector]].
@@ -103,7 +111,12 @@ final class ChiSqSelector(override val uid: String)
 final class ChiSqSelectorModel private[ml] (
     override val uid: String,
     private val chiSqSelector: feature.ChiSqSelectorModel)
-  extends Model[ChiSqSelectorModel] with ChiSqSelectorParams {
+  extends Model[ChiSqSelectorModel] with ChiSqSelectorParams with MLWritable {
+
+  import ChiSqSelectorModel._
+
+  /** list of indices to select (filter). Must be ordered asc */
+  val selectedFeatures: Array[Int] = chiSqSelector.selectedFeatures
 
   /** @group setParam */
   def setFeaturesCol(value: String): this.type = set(featuresCol, value)
@@ -147,4 +160,46 @@ final class ChiSqSelectorModel private[ml] (
     val copied = new ChiSqSelectorModel(uid, chiSqSelector)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new ChiSqSelectorModelWriter(this)
+}
+
+@Since("1.6.0")
+object ChiSqSelectorModel extends MLReadable[ChiSqSelectorModel] {
+
+  private[ChiSqSelectorModel]
+  class ChiSqSelectorModelWriter(instance: ChiSqSelectorModel) extends MLWriter {
+
+    private case class Data(selectedFeatures: Seq[Int])
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.selectedFeatures.toSeq)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class ChiSqSelectorModelReader extends MLReader[ChiSqSelectorModel] {
+
+    private val className = classOf[ChiSqSelectorModel].getName
+
+    override def load(path: String): ChiSqSelectorModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath).select("selectedFeatures").head()
+      val selectedFeatures = data.getAs[Seq[Int]](0).toArray
+      val oldModel = new feature.ChiSqSelectorModel(selectedFeatures)
+      val model = new ChiSqSelectorModel(metadata.uid, oldModel)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[ChiSqSelectorModel] = new ChiSqSelectorModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): ChiSqSelectorModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
index 539084704b65..32d7afee6e73 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
@@ -17,13 +17,15 @@
 
 package org.apache.spark.ml.feature
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml._
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
-import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
+import org.apache.spark.mllib.linalg._
 import org.apache.spark.sql._
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types.{StructField, StructType}
@@ -49,7 +51,8 @@ private[feature] trait PCAParams extends Params with HasInputCol with HasOutputC
  * PCA trains a model to project vectors to a low-dimensional space using PCA.
  */
 @Experimental
-class PCA (override val uid: String) extends Estimator[PCAModel] with PCAParams {
+class PCA (override val uid: String) extends Estimator[PCAModel] with PCAParams
+  with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("pca"))
 
@@ -86,6 +89,13 @@ class PCA (override val uid: String) extends Estimator[PCAModel] with PCAParams
   override def copy(extra: ParamMap): PCA = defaultCopy(extra)
 }
 
+@Since("1.6.0")
+object PCA extends DefaultParamsReadable[PCA] {
+
+  @Since("1.6.0")
+  override def load(path: String): PCA = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model fitted by [[PCA]].
@@ -94,7 +104,12 @@ class PCA (override val uid: String) extends Estimator[PCAModel] with PCAParams
 class PCAModel private[ml] (
     override val uid: String,
     pcaModel: feature.PCAModel)
-  extends Model[PCAModel] with PCAParams {
+  extends Model[PCAModel] with PCAParams with MLWritable {
+
+  import PCAModel._
+
+  /** a principal components Matrix. Each column is one principal component. */
+  val pc: DenseMatrix = pcaModel.pc
 
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
@@ -127,4 +142,46 @@ class PCAModel private[ml] (
     val copied = new PCAModel(uid, pcaModel)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new PCAModelWriter(this)
+}
+
+@Since("1.6.0")
+object PCAModel extends MLReadable[PCAModel] {
+
+  private[PCAModel] class PCAModelWriter(instance: PCAModel) extends MLWriter {
+
+    private case class Data(k: Int, pc: DenseMatrix)
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.getK, instance.pc)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class PCAModelReader extends MLReader[PCAModel] {
+
+    private val className = classOf[PCAModel].getName
+
+    override def load(path: String): PCAModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val Row(k: Int, pc: DenseMatrix) = sqlContext.read.parquet(dataPath)
+        .select("k", "pc")
+        .head()
+      val oldModel = new feature.PCAModel(k, pc)
+      val model = new PCAModel(metadata.uid, oldModel)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[PCAModel] = new PCAModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): PCAModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala
index 52e0599e38d8..a637a6f2881d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorIndexer.scala
@@ -22,12 +22,14 @@ import java.util.{Map => JMap}
 
 import scala.collection.JavaConverters._
 
-import org.apache.spark.annotation.Experimental
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.attribute._
-import org.apache.spark.ml.param.{IntParam, ParamMap, ParamValidators, Params}
+import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.linalg.{DenseVector, SparseVector, Vector, VectorUDT}
 import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.sql.functions.udf
@@ -93,7 +95,7 @@ private[ml] trait VectorIndexerParams extends Params with HasInputCol with HasOu
  */
 @Experimental
 class VectorIndexer(override val uid: String) extends Estimator[VectorIndexerModel]
-  with VectorIndexerParams {
+  with VectorIndexerParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("vecIdx"))
 
@@ -136,7 +138,11 @@ class VectorIndexer(override val uid: String) extends Estimator[VectorIndexerMod
   override def copy(extra: ParamMap): VectorIndexer = defaultCopy(extra)
 }
 
-private object VectorIndexer {
+@Since("1.6.0")
+object VectorIndexer extends DefaultParamsReadable[VectorIndexer] {
+
+  @Since("1.6.0")
+  override def load(path: String): VectorIndexer = super.load(path)
 
   /**
    * Helper class for tracking unique values for each feature.
@@ -146,7 +152,7 @@ private object VectorIndexer {
    * @param numFeatures  This class fails if it encounters a Vector whose length is not numFeatures.
    * @param maxCategories  This class caps the number of unique values collected at maxCategories.
    */
-  class CategoryStats(private val numFeatures: Int, private val maxCategories: Int)
+  private class CategoryStats(private val numFeatures: Int, private val maxCategories: Int)
     extends Serializable {
 
     /** featureValueSets[feature index] = set of unique values */
@@ -252,7 +258,9 @@ class VectorIndexerModel private[ml] (
     override val uid: String,
     val numFeatures: Int,
     val categoryMaps: Map[Int, Map[Double, Int]])
-  extends Model[VectorIndexerModel] with VectorIndexerParams {
+  extends Model[VectorIndexerModel] with VectorIndexerParams with MLWritable {
+
+  import VectorIndexerModel._
 
   /** Java-friendly version of [[categoryMaps]] */
   def javaCategoryMaps: JMap[JInt, JMap[JDouble, JInt]] = {
@@ -408,4 +416,48 @@ class VectorIndexerModel private[ml] (
     val copied = new VectorIndexerModel(uid, numFeatures, categoryMaps)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new VectorIndexerModelWriter(this)
+}
+
+@Since("1.6.0")
+object VectorIndexerModel extends MLReadable[VectorIndexerModel] {
+
+  private[VectorIndexerModel]
+  class VectorIndexerModelWriter(instance: VectorIndexerModel) extends MLWriter {
+
+    private case class Data(numFeatures: Int, categoryMaps: Map[Int, Map[Double, Int]])
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.numFeatures, instance.categoryMaps)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class VectorIndexerModelReader extends MLReader[VectorIndexerModel] {
+
+    private val className = classOf[VectorIndexerModel].getName
+
+    override def load(path: String): VectorIndexerModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("numFeatures", "categoryMaps")
+        .head()
+      val numFeatures = data.getAs[Int](0)
+      val categoryMaps = data.getAs[Map[Int, Map[Double, Int]]](1)
+      val model = new VectorIndexerModel(metadata.uid, numFeatures, categoryMaps)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[VectorIndexerModel] = new VectorIndexerModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): VectorIndexerModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
index 708dbeef84db..a8d61b6dea00 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/Word2Vec.scala
@@ -17,15 +17,17 @@
 
 package org.apache.spark.ml.feature
 
+import org.apache.hadoop.fs.Path
+
 import org.apache.spark.SparkContext
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{BLAS, Vector, VectorUDT, Vectors}
-import org.apache.spark.sql.{DataFrame, SQLContext}
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.types._
 
@@ -90,7 +92,8 @@ private[feature] trait Word2VecBase extends Params
  * natural language processing or machine learning process.
  */
 @Experimental
-final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel] with Word2VecBase {
+final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel] with Word2VecBase
+  with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("w2v"))
 
@@ -139,6 +142,13 @@ final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel]
   override def copy(extra: ParamMap): Word2Vec = defaultCopy(extra)
 }
 
+@Since("1.6.0")
+object Word2Vec extends DefaultParamsReadable[Word2Vec] {
+
+  @Since("1.6.0")
+  override def load(path: String): Word2Vec = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model fitted by [[Word2Vec]].
@@ -147,7 +157,9 @@ final class Word2Vec(override val uid: String) extends Estimator[Word2VecModel]
 class Word2VecModel private[ml] (
     override val uid: String,
     @transient private val wordVectors: feature.Word2VecModel)
-  extends Model[Word2VecModel] with Word2VecBase {
+  extends Model[Word2VecModel] with Word2VecBase with MLWritable {
+
+  import Word2VecModel._
 
   /**
    * Returns a dataframe with two fields, "word" and "vector", with "word" being a String and
@@ -224,4 +236,49 @@ class Word2VecModel private[ml] (
     val copied = new Word2VecModel(uid, wordVectors)
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new Word2VecModelWriter(this)
+}
+
+@Since("1.6.0")
+object Word2VecModel extends MLReadable[Word2VecModel] {
+
+  private[Word2VecModel]
+  class Word2VecModelWriter(instance: Word2VecModel) extends MLWriter {
+
+    private case class Data(wordIndex: Map[String, Int], wordVectors: Seq[Float])
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val data = Data(instance.wordVectors.wordIndex, instance.wordVectors.wordVectors.toSeq)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class Word2VecModelReader extends MLReader[Word2VecModel] {
+
+    private val className = classOf[Word2VecModel].getName
+
+    override def load(path: String): Word2VecModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("wordIndex", "wordVectors")
+        .head()
+      val wordIndex = data.getAs[Map[String, Int]](0)
+      val wordVectors = data.getAs[Seq[Float]](1).toArray
+      val oldModel = new feature.Word2VecModel(wordIndex, wordVectors)
+      val model = new Word2VecModel(metadata.uid, oldModel)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[Word2VecModel] = new Word2VecModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): Word2VecModel = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
index 7ab0d89d23a3..a47f27b0afb1 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/feature/Word2Vec.scala
@@ -432,9 +432,9 @@ class Word2Vec extends Serializable with Logging {
  *                    (i * vectorSize, i * vectorSize + vectorSize)
  */
 @Since("1.1.0")
-class Word2VecModel private[mllib] (
-    private val wordIndex: Map[String, Int],
-    private val wordVectors: Array[Float]) extends Serializable with Saveable {
+class Word2VecModel private[spark] (
+    private[spark] val wordIndex: Map[String, Int],
+    private[spark] val wordVectors: Array[Float]) extends Serializable with Saveable {
 
   private val numWords = wordIndex.size
   // vectorSize: Dimension of each word's vector.
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala
index e5a42967bd2c..7827db2794cf 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/ChiSqSelectorSuite.scala
@@ -18,13 +18,17 @@
 package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
+import org.apache.spark.mllib.feature
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{Row, SQLContext}
 
-class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext {
+class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext
+  with DefaultReadWriteTest {
+
   test("Test Chi-Square selector") {
     val sqlContext = SQLContext.getOrCreate(sc)
     import sqlContext.implicits._
@@ -58,4 +62,20 @@ class ChiSqSelectorSuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(vec1 ~== vec2 absTol 1e-1)
     }
   }
+
+  test("ChiSqSelector read/write") {
+    val t = new ChiSqSelector()
+      .setFeaturesCol("myFeaturesCol")
+      .setLabelCol("myLabelCol")
+      .setOutputCol("myOutputCol")
+      .setNumTopFeatures(2)
+    testDefaultReadWrite(t)
+  }
+
+  test("ChiSqSelectorModel read/write") {
+    val oldModel = new feature.ChiSqSelectorModel(Array(1, 3))
+    val instance = new ChiSqSelectorModel("myChiSqSelectorModel", oldModel)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.selectedFeatures === instance.selectedFeatures)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
index 30c500f87a76..5a21cd20ceed 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
@@ -19,15 +19,15 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.distributed.RowMatrix
-import org.apache.spark.mllib.linalg.{Vector, Vectors, DenseMatrix, Matrices}
+import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.mllib.feature.{PCAModel => OldPCAModel}
 import org.apache.spark.sql.Row
 
-class PCASuite extends SparkFunSuite with MLlibTestSparkContext {
+class PCASuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new PCA)
@@ -65,4 +65,24 @@ class PCASuite extends SparkFunSuite with MLlibTestSparkContext {
         assert(x ~== y absTol 1e-5, "Transformed vector is different with expected vector.")
     }
   }
+
+  test("read/write") {
+
+    def checkModelData(model1: PCAModel, model2: PCAModel): Unit = {
+      assert(model1.pc === model2.pc)
+    }
+    val allParams: Map[String, Any] = Map(
+      "k" -> 3,
+      "inputCol" -> "features",
+      "outputCol" -> "pca_features"
+    )
+    val data = Seq(
+      (0.0, Vectors.sparse(5, Seq((1, 1.0), (3, 7.0)))),
+      (1.0, Vectors.dense(2.0, 0.0, 3.0, 4.0, 5.0)),
+      (2.0, Vectors.dense(4.0, 0.0, 0.0, 6.0, 7.0))
+    )
+    val df = sqlContext.createDataFrame(data).toDF("id", "features")
+    val pca = new PCA().setK(3)
+    testEstimatorAndModelReadWrite(pca, df, allParams, checkModelData)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorIndexerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorIndexerSuite.scala
index 8cb0a2cf14d3..67817fa4baf5 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorIndexerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorIndexerSuite.scala
@@ -22,13 +22,14 @@ import scala.beans.{BeanInfo, BeanProperty}
 import org.apache.spark.{Logging, SparkException, SparkFunSuite}
 import org.apache.spark.ml.attribute._
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.{SparseVector, Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.DataFrame
 
-class VectorIndexerSuite extends SparkFunSuite with MLlibTestSparkContext with Logging {
+class VectorIndexerSuite extends SparkFunSuite with MLlibTestSparkContext
+  with DefaultReadWriteTest with Logging {
 
   import VectorIndexerSuite.FeatureData
 
@@ -251,6 +252,23 @@ class VectorIndexerSuite extends SparkFunSuite with MLlibTestSparkContext with L
       }
     }
   }
+
+  test("VectorIndexer read/write") {
+    val t = new VectorIndexer()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMaxCategories(30)
+    testDefaultReadWrite(t)
+  }
+
+  test("VectorIndexerModel read/write") {
+    val categoryMaps = Map(0 -> Map(0.0 -> 0, 1.0 -> 1), 1 -> Map(0.0 -> 0, 1.0 -> 1,
+      2.0 -> 2, 3.0 -> 3), 2 -> Map(0.0 -> 0, -1.0 -> 1, 2.0 -> 2))
+    val instance = new VectorIndexerModel("myVectorIndexerModel", 3, categoryMaps)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.numFeatures === instance.numFeatures)
+    assert(newInstance.categoryMaps === instance.categoryMaps)
+  }
 }
 
 private[feature] object VectorIndexerSuite {
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
index 23dfdaa9f8fc..a773244cd735 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/Word2VecSuite.scala
@@ -19,14 +19,14 @@ package org.apache.spark.ml.feature
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{Row, SQLContext}
 import org.apache.spark.mllib.feature.{Word2VecModel => OldWord2VecModel}
 
-class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext {
+class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new Word2Vec)
@@ -143,5 +143,31 @@ class Word2VecSuite extends SparkFunSuite with MLlibTestSparkContext {
     }
 
   }
+
+  test("Word2Vec read/write") {
+    val t = new Word2Vec()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setMaxIter(2)
+      .setMinCount(8)
+      .setNumPartitions(1)
+      .setSeed(42L)
+      .setStepSize(0.01)
+      .setVectorSize(100)
+    testDefaultReadWrite(t)
+  }
+
+  test("Word2VecModel read/write") {
+    val word2VecMap = Map(
+      ("china", Array(0.50f, 0.50f, 0.50f, 0.50f)),
+      ("japan", Array(0.40f, 0.50f, 0.50f, 0.50f)),
+      ("taiwan", Array(0.60f, 0.50f, 0.50f, 0.50f)),
+      ("korea", Array(0.45f, 0.60f, 0.60f, 0.60f))
+    )
+    val oldModel = new OldWord2VecModel(word2VecMap)
+    val instance = new Word2VecModel("myWord2VecModel", oldModel)
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.getVectors.collect() === instance.getVectors.collect())
+  }
 }
 

From 7216f405454f6f3557b5b1f72df8f393605faf60 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Thu, 19 Nov 2015 22:14:01 -0800
Subject: [PATCH 816/896] [SPARK-11875][ML][PYSPARK] Update doc for PySpark
 HasCheckpointInterval

* Update doc for PySpark ```HasCheckpointInterval``` that users can understand how to disable checkpoint.
* Update doc for PySpark ```cacheNodeIds``` of ```DecisionTreeParams``` to notify the relationship between ```cacheNodeIds``` and ```checkpointInterval```.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9856 from yanboliang/spark-11875.
---
 python/pyspark/ml/param/_shared_params_code_gen.py |  6 ++++--
 python/pyspark/ml/param/shared.py                  | 14 +++++++-------
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/python/pyspark/ml/param/_shared_params_code_gen.py b/python/pyspark/ml/param/_shared_params_code_gen.py
index 070c5db01ae7..0528dc1e3a6b 100644
--- a/python/pyspark/ml/param/_shared_params_code_gen.py
+++ b/python/pyspark/ml/param/_shared_params_code_gen.py
@@ -118,7 +118,8 @@ def get$Name(self):
         ("inputCols", "input column names.", None),
         ("outputCol", "output column name.", "self.uid + '__output'"),
         ("numFeatures", "number of features.", None),
-        ("checkpointInterval", "checkpoint interval (>= 1).", None),
+        ("checkpointInterval", "set checkpoint interval (>= 1) or disable checkpoint (-1). " +
+         "E.g. 10 means that the cache will get checkpointed every 10 iterations.", None),
         ("seed", "random seed.", "hash(type(self).__name__)"),
         ("tol", "the convergence tolerance for iterative algorithms.", None),
         ("stepSize", "Step size to be used for each iteration of optimization.", None),
@@ -157,7 +158,8 @@ def get$Name(self):
         ("maxMemoryInMB", "Maximum memory in MB allocated to histogram aggregation."),
         ("cacheNodeIds", "If false, the algorithm will pass trees to executors to match " +
          "instances with nodes. If true, the algorithm will cache node IDs for each instance. " +
-         "Caching can speed up training of deeper trees.")]
+         "Caching can speed up training of deeper trees. Users can set how often should the " +
+         "cache be checkpointed or disable it by setting checkpointInterval.")]
 
     decisionTreeCode = '''class DecisionTreeParams(Params):
     """
diff --git a/python/pyspark/ml/param/shared.py b/python/pyspark/ml/param/shared.py
index 4bdf2a8cc563..4d960801502c 100644
--- a/python/pyspark/ml/param/shared.py
+++ b/python/pyspark/ml/param/shared.py
@@ -325,16 +325,16 @@ def getNumFeatures(self):
 
 class HasCheckpointInterval(Params):
     """
-    Mixin for param checkpointInterval: checkpoint interval (>= 1).
+    Mixin for param checkpointInterval: set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations.
     """
 
     # a placeholder to make it appear in the generated doc
-    checkpointInterval = Param(Params._dummy(), "checkpointInterval", "checkpoint interval (>= 1).")
+    checkpointInterval = Param(Params._dummy(), "checkpointInterval", "set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations.")
 
     def __init__(self):
         super(HasCheckpointInterval, self).__init__()
-        #: param for checkpoint interval (>= 1).
-        self.checkpointInterval = Param(self, "checkpointInterval", "checkpoint interval (>= 1).")
+        #: param for set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations.
+        self.checkpointInterval = Param(self, "checkpointInterval", "set checkpoint interval (>= 1) or disable checkpoint (-1). E.g. 10 means that the cache will get checkpointed every 10 iterations.")
 
     def setCheckpointInterval(self, value):
         """
@@ -636,7 +636,7 @@ class DecisionTreeParams(Params):
     minInstancesPerNode = Param(Params._dummy(), "minInstancesPerNode", "Minimum number of instances each child must have after split. If a split causes the left or right child to have fewer than minInstancesPerNode, the split will be discarded as invalid. Should be >= 1.")
     minInfoGain = Param(Params._dummy(), "minInfoGain", "Minimum information gain for a split to be considered at a tree node.")
     maxMemoryInMB = Param(Params._dummy(), "maxMemoryInMB", "Maximum memory in MB allocated to histogram aggregation.")
-    cacheNodeIds = Param(Params._dummy(), "cacheNodeIds", "If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees.")
+    cacheNodeIds = Param(Params._dummy(), "cacheNodeIds", "If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees. Users can set how often should the cache be checkpointed or disable it by setting checkpointInterval.")
     
 
     def __init__(self):
@@ -651,8 +651,8 @@ def __init__(self):
         self.minInfoGain = Param(self, "minInfoGain", "Minimum information gain for a split to be considered at a tree node.")
         #: param for Maximum memory in MB allocated to histogram aggregation.
         self.maxMemoryInMB = Param(self, "maxMemoryInMB", "Maximum memory in MB allocated to histogram aggregation.")
-        #: param for If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees.
-        self.cacheNodeIds = Param(self, "cacheNodeIds", "If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees.")
+        #: param for If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees. Users can set how often should the cache be checkpointed or disable it by setting checkpointInterval.
+        self.cacheNodeIds = Param(self, "cacheNodeIds", "If false, the algorithm will pass trees to executors to match instances with nodes. If true, the algorithm will cache node IDs for each instance. Caching can speed up training of deeper trees. Users can set how often should the cache be checkpointed or disable it by setting checkpointInterval.")
         
     def setMaxDepth(self, value):
         """

From 0fff8eb3e476165461658d4e16682ec64269fdfe Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Thu, 19 Nov 2015 23:42:24 -0800
Subject: [PATCH 817/896] [SPARK-11869][ML] Clean up TempDirectory properly in
 ML tests

Need to remove parent directory (```className```) rather than just tempDir (```className/random_name```)

I tested this with IDFSuite, which has 2 read/write tests, and it fixes the problem.

CC: mengxr  Can you confirm this is fine?  I believe it is since the same ```random_name``` is used for all tests in a suite; we basically have an extra unneeded level of nesting.

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9851 from jkbradley/tempdir-cleanup.
---
 .../src/test/scala/org/apache/spark/ml/util/TempDirectory.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala b/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala
index 2742026a69c2..c8a0bb16247b 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/TempDirectory.scala
@@ -35,7 +35,7 @@ trait TempDirectory extends BeforeAndAfterAll { self: Suite =>
 
   override def beforeAll(): Unit = {
     super.beforeAll()
-    _tempDir = Utils.createTempDir(this.getClass.getName)
+    _tempDir = Utils.createTempDir(namePrefix = this.getClass.getName)
   }
 
   override def afterAll(): Unit = {

From 3e1d120cedb4bd9e1595e95d4d531cf61da6684d Mon Sep 17 00:00:00 2001
From: Xusen Yin <yinxusen@gmail.com>
Date: Thu, 19 Nov 2015 23:43:18 -0800
Subject: [PATCH 818/896] [SPARK-11867] Add save/load for kmeans and naive
 bayes

https://issues.apache.org/jira/browse/SPARK-11867

Author: Xusen Yin <yinxusen@gmail.com>

Closes #9849 from yinxusen/SPARK-11867.
---
 .../spark/ml/classification/NaiveBayes.scala  | 68 +++++++++++++++++--
 .../apache/spark/ml/clustering/KMeans.scala   | 67 ++++++++++++++++--
 .../ml/classification/NaiveBayesSuite.scala   | 47 +++++++++++--
 .../spark/ml/clustering/KMeansSuite.scala     | 41 ++++++++---
 4 files changed, 195 insertions(+), 28 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
index a14dcecbaf5b..c512a2cb8bf3 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/NaiveBayes.scala
@@ -17,12 +17,15 @@
 
 package org.apache.spark.ml.classification
 
+import org.apache.hadoop.fs.Path
+
 import org.apache.spark.SparkException
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.PredictorParams
 import org.apache.spark.ml.param.{DoubleParam, Param, ParamMap, ParamValidators}
-import org.apache.spark.ml.util.Identifiable
-import org.apache.spark.mllib.classification.{NaiveBayes => OldNaiveBayes, NaiveBayesModel => OldNaiveBayesModel}
+import org.apache.spark.ml.util._
+import org.apache.spark.mllib.classification.{NaiveBayes => OldNaiveBayes}
+import org.apache.spark.mllib.classification.{NaiveBayesModel => OldNaiveBayesModel}
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.rdd.RDD
@@ -72,7 +75,7 @@ private[ml] trait NaiveBayesParams extends PredictorParams {
 @Experimental
 class NaiveBayes(override val uid: String)
   extends ProbabilisticClassifier[Vector, NaiveBayes, NaiveBayesModel]
-  with NaiveBayesParams {
+  with NaiveBayesParams with DefaultParamsWritable {
 
   def this() = this(Identifiable.randomUID("nb"))
 
@@ -102,6 +105,13 @@ class NaiveBayes(override val uid: String)
   override def copy(extra: ParamMap): NaiveBayes = defaultCopy(extra)
 }
 
+@Since("1.6.0")
+object NaiveBayes extends DefaultParamsReadable[NaiveBayes] {
+
+  @Since("1.6.0")
+  override def load(path: String): NaiveBayes = super.load(path)
+}
+
 /**
  * :: Experimental ::
  * Model produced by [[NaiveBayes]]
@@ -114,7 +124,8 @@ class NaiveBayesModel private[ml] (
     override val uid: String,
     val pi: Vector,
     val theta: Matrix)
-  extends ProbabilisticClassificationModel[Vector, NaiveBayesModel] with NaiveBayesParams {
+  extends ProbabilisticClassificationModel[Vector, NaiveBayesModel]
+  with NaiveBayesParams with MLWritable {
 
   import OldNaiveBayes.{Bernoulli, Multinomial}
 
@@ -203,12 +214,15 @@ class NaiveBayesModel private[ml] (
     s"NaiveBayesModel (uid=$uid) with ${pi.size} classes"
   }
 
+  @Since("1.6.0")
+  override def write: MLWriter = new NaiveBayesModel.NaiveBayesModelWriter(this)
 }
 
-private[ml] object NaiveBayesModel {
+@Since("1.6.0")
+object NaiveBayesModel extends MLReadable[NaiveBayesModel] {
 
   /** Convert a model from the old API */
-  def fromOld(
+  private[ml] def fromOld(
       oldModel: OldNaiveBayesModel,
       parent: NaiveBayes): NaiveBayesModel = {
     val uid = if (parent != null) parent.uid else Identifiable.randomUID("nb")
@@ -218,4 +232,44 @@ private[ml] object NaiveBayesModel {
       oldModel.theta.flatten, true)
     new NaiveBayesModel(uid, pi, theta)
   }
+
+  @Since("1.6.0")
+  override def read: MLReader[NaiveBayesModel] = new NaiveBayesModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): NaiveBayesModel = super.load(path)
+
+  /** [[MLWriter]] instance for [[NaiveBayesModel]] */
+  private[NaiveBayesModel] class NaiveBayesModelWriter(instance: NaiveBayesModel) extends MLWriter {
+
+    private case class Data(pi: Vector, theta: Matrix)
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: pi, theta
+      val data = Data(instance.pi, instance.theta)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class NaiveBayesModelReader extends MLReader[NaiveBayesModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[NaiveBayesModel].getName
+
+    override def load(path: String): NaiveBayesModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath).select("pi", "theta").head()
+      val pi = data.getAs[Vector](0)
+      val theta = data.getAs[Matrix](1)
+      val model = new NaiveBayesModel(metadata.uid, pi, theta)
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
index 509be6300239..71e968497500 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/KMeans.scala
@@ -17,10 +17,12 @@
 
 package org.apache.spark.ml.clustering
 
-import org.apache.spark.annotation.{Since, Experimental}
-import org.apache.spark.ml.param.{Param, Params, IntParam, ParamMap}
+import org.apache.hadoop.fs.Path
+
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.param.{IntParam, Param, ParamMap, Params}
+import org.apache.spark.ml.util._
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.mllib.clustering.{KMeans => MLlibKMeans, KMeansModel => MLlibKMeansModel}
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
@@ -28,7 +30,6 @@ import org.apache.spark.sql.functions.{col, udf}
 import org.apache.spark.sql.types.{IntegerType, StructType}
 import org.apache.spark.sql.{DataFrame, Row}
 
-
 /**
  * Common params for KMeans and KMeansModel
  */
@@ -94,7 +95,8 @@ private[clustering] trait KMeansParams extends Params with HasMaxIter with HasFe
 @Experimental
 class KMeansModel private[ml] (
     @Since("1.5.0") override val uid: String,
-    private val parentModel: MLlibKMeansModel) extends Model[KMeansModel] with KMeansParams {
+    private val parentModel: MLlibKMeansModel)
+  extends Model[KMeansModel] with KMeansParams with MLWritable {
 
   @Since("1.5.0")
   override def copy(extra: ParamMap): KMeansModel = {
@@ -129,6 +131,52 @@ class KMeansModel private[ml] (
     val data = dataset.select(col($(featuresCol))).map { case Row(point: Vector) => point }
     parentModel.computeCost(data)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new KMeansModel.KMeansModelWriter(this)
+}
+
+@Since("1.6.0")
+object KMeansModel extends MLReadable[KMeansModel] {
+
+  @Since("1.6.0")
+  override def read: MLReader[KMeansModel] = new KMeansModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): KMeansModel = super.load(path)
+
+  /** [[MLWriter]] instance for [[KMeansModel]] */
+  private[KMeansModel] class KMeansModelWriter(instance: KMeansModel) extends MLWriter {
+
+    private case class Data(clusterCenters: Array[Vector])
+
+    override protected def saveImpl(path: String): Unit = {
+      // Save metadata and Params
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      // Save model data: cluster centers
+      val data = Data(instance.clusterCenters)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class KMeansModelReader extends MLReader[KMeansModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[KMeansModel].getName
+
+    override def load(path: String): KMeansModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath).select("clusterCenters").head()
+      val clusterCenters = data.getAs[Seq[Vector]](0).toArray
+      val model = new KMeansModel(metadata.uid, new MLlibKMeansModel(clusterCenters))
+
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
 }
 
 /**
@@ -141,7 +189,7 @@ class KMeansModel private[ml] (
 @Experimental
 class KMeans @Since("1.5.0") (
     @Since("1.5.0") override val uid: String)
-  extends Estimator[KMeansModel] with KMeansParams {
+  extends Estimator[KMeansModel] with KMeansParams with DefaultParamsWritable {
 
   setDefault(
     k -> 2,
@@ -210,3 +258,10 @@ class KMeans @Since("1.5.0") (
   }
 }
 
+@Since("1.6.0")
+object KMeans extends DefaultParamsReadable[KMeans] {
+
+  @Since("1.6.0")
+  override def load(path: String): KMeans = super.load(path)
+}
+
diff --git a/mllib/src/test/scala/org/apache/spark/ml/classification/NaiveBayesSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/classification/NaiveBayesSuite.scala
index 98bc9511163e..082a6bcd211a 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/classification/NaiveBayesSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/classification/NaiveBayesSuite.scala
@@ -21,15 +21,30 @@ import breeze.linalg.{Vector => BV}
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
-import org.apache.spark.mllib.classification.NaiveBayes.{Multinomial, Bernoulli}
+import org.apache.spark.ml.util.DefaultReadWriteTest
+import org.apache.spark.mllib.classification.NaiveBayes.{Bernoulli, Multinomial}
+import org.apache.spark.mllib.classification.NaiveBayesSuite._
 import org.apache.spark.mllib.linalg._
 import org.apache.spark.mllib.util.MLlibTestSparkContext
 import org.apache.spark.mllib.util.TestingUtils._
-import org.apache.spark.mllib.classification.NaiveBayesSuite._
-import org.apache.spark.sql.DataFrame
-import org.apache.spark.sql.Row
+import org.apache.spark.sql.{DataFrame, Row}
+
+class NaiveBayesSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
+
+  @transient var dataset: DataFrame = _
+
+  override def beforeAll(): Unit = {
+    super.beforeAll()
+
+    val pi = Array(0.5, 0.1, 0.4).map(math.log)
+    val theta = Array(
+      Array(0.70, 0.10, 0.10, 0.10), // label 0
+      Array(0.10, 0.70, 0.10, 0.10), // label 1
+      Array(0.10, 0.10, 0.70, 0.10)  // label 2
+    ).map(_.map(math.log))
 
-class NaiveBayesSuite extends SparkFunSuite with MLlibTestSparkContext {
+    dataset = sqlContext.createDataFrame(generateNaiveBayesInput(pi, theta, 100, 42))
+  }
 
   def validatePrediction(predictionAndLabels: DataFrame): Unit = {
     val numOfErrorPredictions = predictionAndLabels.collect().count {
@@ -161,4 +176,26 @@ class NaiveBayesSuite extends SparkFunSuite with MLlibTestSparkContext {
       .select("features", "probability")
     validateProbabilities(featureAndProbabilities, model, "bernoulli")
   }
+
+  test("read/write") {
+    def checkModelData(model: NaiveBayesModel, model2: NaiveBayesModel): Unit = {
+      assert(model.pi === model2.pi)
+      assert(model.theta === model2.theta)
+    }
+    val nb = new NaiveBayes()
+    testEstimatorAndModelReadWrite(nb, dataset, NaiveBayesSuite.allParamSettings, checkModelData)
+  }
+}
+
+object NaiveBayesSuite {
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "smoothing" -> 0.1
+  )
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
index c05f90550d16..2724e51f31aa 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/clustering/KMeansSuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.ml.clustering
 
 import org.apache.spark.SparkFunSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.clustering.{KMeans => MLlibKMeans}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
@@ -25,16 +26,7 @@ import org.apache.spark.sql.{DataFrame, SQLContext}
 
 private[clustering] case class TestRow(features: Vector)
 
-object KMeansSuite {
-  def generateKMeansData(sql: SQLContext, rows: Int, dim: Int, k: Int): DataFrame = {
-    val sc = sql.sparkContext
-    val rdd = sc.parallelize(1 to rows).map(i => Vectors.dense(Array.fill(dim)((i % k).toDouble)))
-      .map(v => new TestRow(v))
-    sql.createDataFrame(rdd)
-  }
-}
-
-class KMeansSuite extends SparkFunSuite with MLlibTestSparkContext {
+class KMeansSuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   final val k = 5
   @transient var dataset: DataFrame = _
@@ -106,4 +98,33 @@ class KMeansSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(clusters === Set(0, 1, 2, 3, 4))
     assert(model.computeCost(dataset) < 0.1)
   }
+
+  test("read/write") {
+    def checkModelData(model: KMeansModel, model2: KMeansModel): Unit = {
+      assert(model.clusterCenters === model2.clusterCenters)
+    }
+    val kmeans = new KMeans()
+    testEstimatorAndModelReadWrite(kmeans, dataset, KMeansSuite.allParamSettings, checkModelData)
+  }
+}
+
+object KMeansSuite {
+  def generateKMeansData(sql: SQLContext, rows: Int, dim: Int, k: Int): DataFrame = {
+    val sc = sql.sparkContext
+    val rdd = sc.parallelize(1 to rows).map(i => Vectors.dense(Array.fill(dim)((i % k).toDouble)))
+      .map(v => new TestRow(v))
+    sql.createDataFrame(rdd)
+  }
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "predictionCol" -> "myPrediction",
+    "k" -> 3,
+    "maxIter" -> 2,
+    "tol" -> 0.01
+  )
 }

From a66142decee48bf5689fb7f4f33646d7bb1ac08d Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Fri, 20 Nov 2015 00:46:29 -0800
Subject: [PATCH 819/896] [SPARK-11877] Prevent agg. fallback conf. from
 leaking across test suites

This patch fixes an issue where the `spark.sql.TungstenAggregate.testFallbackStartsAt` SQLConf setting was not properly reset / cleared at the end of `TungstenAggregationQueryWithControlledFallbackSuite`. This ended up causing test failures in HiveCompatibilitySuite in Maven builds by causing spilling to occur way too frequently.

This configuration leak was inadvertently introduced during test cleanup in #9618.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9857 from JoshRosen/clear-fallback-prop-in-test-teardown.
---
 .../execution/AggregationQuerySuite.scala     | 44 +++++++++----------
 1 file changed, 21 insertions(+), 23 deletions(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
index 6dde79f74d3d..39c0a2a0de04 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/AggregationQuerySuite.scala
@@ -868,29 +868,27 @@ class TungstenAggregationQueryWithControlledFallbackSuite extends AggregationQue
 
   override protected def checkAnswer(actual: => DataFrame, expectedAnswer: Seq[Row]): Unit = {
     (0 to 2).foreach { fallbackStartsAt =>
-      sqlContext.setConf(
-        "spark.sql.TungstenAggregate.testFallbackStartsAt",
-        fallbackStartsAt.toString)
-
-      // Create a new df to make sure its physical operator picks up
-      // spark.sql.TungstenAggregate.testFallbackStartsAt.
-      // todo: remove it?
-      val newActual = DataFrame(sqlContext, actual.logicalPlan)
-
-      QueryTest.checkAnswer(newActual, expectedAnswer) match {
-        case Some(errorMessage) =>
-          val newErrorMessage =
-            s"""
-              |The following aggregation query failed when using TungstenAggregate with
-              |controlled fallback (it falls back to sort-based aggregation once it has processed
-              |$fallbackStartsAt input rows). The query is
-              |${actual.queryExecution}
-              |
-              |$errorMessage
-            """.stripMargin
-
-          fail(newErrorMessage)
-        case None =>
+      withSQLConf("spark.sql.TungstenAggregate.testFallbackStartsAt" -> fallbackStartsAt.toString) {
+        // Create a new df to make sure its physical operator picks up
+        // spark.sql.TungstenAggregate.testFallbackStartsAt.
+        // todo: remove it?
+        val newActual = DataFrame(sqlContext, actual.logicalPlan)
+
+        QueryTest.checkAnswer(newActual, expectedAnswer) match {
+          case Some(errorMessage) =>
+            val newErrorMessage =
+              s"""
+                |The following aggregation query failed when using TungstenAggregate with
+                |controlled fallback (it falls back to sort-based aggregation once it has processed
+                |$fallbackStartsAt input rows). The query is
+                |${actual.queryExecution}
+                |
+                |$errorMessage
+              """.stripMargin
+
+            fail(newErrorMessage)
+          case None =>
+        }
       }
     }
   }

From 9ace2e5c8d7fbd360a93bc5fc4eace64a697b44f Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Fri, 20 Nov 2015 09:55:53 -0800
Subject: [PATCH 820/896] [SPARK-11852][ML] StandardScaler minor refactor

```withStd``` and ```withMean``` should be params of ```StandardScaler``` and ```StandardScalerModel```.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9839 from yanboliang/standardScaler-refactor.
---
 .../spark/ml/feature/StandardScaler.scala     | 60 +++++++++----------
 .../ml/feature/StandardScalerSuite.scala      | 11 ++--
 2 files changed, 32 insertions(+), 39 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
index 6d545219ebf4..d76a9c6275e6 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/StandardScaler.scala
@@ -36,20 +36,30 @@ import org.apache.spark.sql.types.{StructField, StructType}
 private[feature] trait StandardScalerParams extends Params with HasInputCol with HasOutputCol {
 
   /**
-   * Centers the data with mean before scaling.
+   * Whether to center the data with mean before scaling.
    * It will build a dense output, so this does not work on sparse input
    * and will raise an exception.
    * Default: false
    * @group param
    */
-  val withMean: BooleanParam = new BooleanParam(this, "withMean", "Center data with mean")
+  val withMean: BooleanParam = new BooleanParam(this, "withMean",
+    "Whether to center data with mean")
+
+  /** @group getParam */
+  def getWithMean: Boolean = $(withMean)
 
   /**
-   * Scales the data to unit standard deviation.
+   * Whether to scale the data to unit standard deviation.
    * Default: true
    * @group param
    */
-  val withStd: BooleanParam = new BooleanParam(this, "withStd", "Scale to unit standard deviation")
+  val withStd: BooleanParam = new BooleanParam(this, "withStd",
+    "Whether to scale the data to unit standard deviation")
+
+  /** @group getParam */
+  def getWithStd: Boolean = $(withStd)
+
+  setDefault(withMean -> false, withStd -> true)
 }
 
 /**
@@ -63,8 +73,6 @@ class StandardScaler(override val uid: String) extends Estimator[StandardScalerM
 
   def this() = this(Identifiable.randomUID("stdScal"))
 
-  setDefault(withMean -> false, withStd -> true)
-
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
 
@@ -82,7 +90,7 @@ class StandardScaler(override val uid: String) extends Estimator[StandardScalerM
     val input = dataset.select($(inputCol)).map { case Row(v: Vector) => v }
     val scaler = new feature.StandardScaler(withMean = $(withMean), withStd = $(withStd))
     val scalerModel = scaler.fit(input)
-    copyValues(new StandardScalerModel(uid, scalerModel).setParent(this))
+    copyValues(new StandardScalerModel(uid, scalerModel.std, scalerModel.mean).setParent(this))
   }
 
   override def transformSchema(schema: StructType): StructType = {
@@ -108,29 +116,19 @@ object StandardScaler extends DefaultParamsReadable[StandardScaler] {
 /**
  * :: Experimental ::
  * Model fitted by [[StandardScaler]].
+ *
+ * @param std Standard deviation of the StandardScalerModel
+ * @param mean Mean of the StandardScalerModel
  */
 @Experimental
 class StandardScalerModel private[ml] (
     override val uid: String,
-    scaler: feature.StandardScalerModel)
+    val std: Vector,
+    val mean: Vector)
   extends Model[StandardScalerModel] with StandardScalerParams with MLWritable {
 
   import StandardScalerModel._
 
-  /** Standard deviation of the StandardScalerModel */
-  val std: Vector = scaler.std
-
-  /** Mean of the StandardScalerModel */
-  val mean: Vector = scaler.mean
-
-  /** Whether to scale to unit standard deviation. */
-  @Since("1.6.0")
-  def getWithStd: Boolean = scaler.withStd
-
-  /** Whether to center data with mean. */
-  @Since("1.6.0")
-  def getWithMean: Boolean = scaler.withMean
-
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
 
@@ -139,6 +137,7 @@ class StandardScalerModel private[ml] (
 
   override def transform(dataset: DataFrame): DataFrame = {
     transformSchema(dataset.schema, logging = true)
+    val scaler = new feature.StandardScalerModel(std, mean, $(withStd), $(withMean))
     val scale = udf { scaler.transform _ }
     dataset.withColumn($(outputCol), scale(col($(inputCol))))
   }
@@ -154,7 +153,7 @@ class StandardScalerModel private[ml] (
   }
 
   override def copy(extra: ParamMap): StandardScalerModel = {
-    val copied = new StandardScalerModel(uid, scaler)
+    val copied = new StandardScalerModel(uid, std, mean)
     copyValues(copied, extra).setParent(parent)
   }
 
@@ -168,11 +167,11 @@ object StandardScalerModel extends MLReadable[StandardScalerModel] {
   private[StandardScalerModel]
   class StandardScalerModelWriter(instance: StandardScalerModel) extends MLWriter {
 
-    private case class Data(std: Vector, mean: Vector, withStd: Boolean, withMean: Boolean)
+    private case class Data(std: Vector, mean: Vector)
 
     override protected def saveImpl(path: String): Unit = {
       DefaultParamsWriter.saveMetadata(instance, path, sc)
-      val data = Data(instance.std, instance.mean, instance.getWithStd, instance.getWithMean)
+      val data = Data(instance.std, instance.mean)
       val dataPath = new Path(path, "data").toString
       sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
     }
@@ -185,13 +184,10 @@ object StandardScalerModel extends MLReadable[StandardScalerModel] {
     override def load(path: String): StandardScalerModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
       val dataPath = new Path(path, "data").toString
-      val Row(std: Vector, mean: Vector, withStd: Boolean, withMean: Boolean) =
-        sqlContext.read.parquet(dataPath)
-          .select("std", "mean", "withStd", "withMean")
-          .head()
-      // This is very likely to change in the future because withStd and withMean should be params.
-      val oldModel = new feature.StandardScalerModel(std, mean, withStd, withMean)
-      val model = new StandardScalerModel(metadata.uid, oldModel)
+      val Row(std: Vector, mean: Vector) = sqlContext.read.parquet(dataPath)
+        .select("std", "mean")
+        .head()
+      val model = new StandardScalerModel(metadata.uid, std, mean)
       DefaultParamsReader.getAndSetParams(model, metadata)
       model
     }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
index 49a4b2efe0c2..1eae125a524e 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/StandardScalerSuite.scala
@@ -70,8 +70,8 @@ class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext
 
   test("params") {
     ParamsSuite.checkParams(new StandardScaler)
-    val oldModel = new feature.StandardScalerModel(Vectors.dense(1.0), Vectors.dense(2.0))
-    ParamsSuite.checkParams(new StandardScalerModel("empty", oldModel))
+    ParamsSuite.checkParams(new StandardScalerModel("empty",
+      Vectors.dense(1.0), Vectors.dense(2.0)))
   }
 
   test("Standardization with default parameter") {
@@ -126,13 +126,10 @@ class StandardScalerSuite extends SparkFunSuite with MLlibTestSparkContext
   }
 
   test("StandardScalerModel read/write") {
-    val oldModel = new feature.StandardScalerModel(
-      Vectors.dense(1.0, 2.0), Vectors.dense(3.0, 4.0), false, true)
-    val instance = new StandardScalerModel("myStandardScalerModel", oldModel)
+    val instance = new StandardScalerModel("myStandardScalerModel",
+      Vectors.dense(1.0, 2.0), Vectors.dense(3.0, 4.0))
     val newInstance = testDefaultReadWrite(instance)
     assert(newInstance.std === instance.std)
     assert(newInstance.mean === instance.mean)
-    assert(newInstance.getWithStd === instance.getWithStd)
-    assert(newInstance.getWithMean === instance.getWithMean)
   }
 }

From e359d5dcf5bd300213054ebeae9fe75c4f7eb9e7 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Fri, 20 Nov 2015 09:57:09 -0800
Subject: [PATCH 821/896] [SPARK-11689][ML] Add user guide and example code for
 LDA under spark.ml

jira: https://issues.apache.org/jira/browse/SPARK-11689

Add simple user guide for LDA under spark.ml and example code under examples/. Use include_example to include example code in the user guide markdown. Check SPARK-11606 for instructions.

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #9722 from hhbyyh/ldaMLExample.
---
 docs/ml-clustering.md                         | 30 ++++++
 docs/ml-guide.md                              |  3 +-
 docs/mllib-guide.md                           |  1 +
 .../spark/examples/ml/JavaLDAExample.java     | 94 +++++++++++++++++++
 .../apache/spark/examples/ml/LDAExample.scala | 77 +++++++++++++++
 5 files changed, 204 insertions(+), 1 deletion(-)
 create mode 100644 docs/ml-clustering.md
 create mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala

diff --git a/docs/ml-clustering.md b/docs/ml-clustering.md
new file mode 100644
index 000000000000..1743ef43a6dd
--- /dev/null
+++ b/docs/ml-clustering.md
@@ -0,0 +1,30 @@
+---
+layout: global
+title: Clustering - ML
+displayTitle: <a href="ml-guide.html">ML</a> - Clustering
+---
+
+In this section, we introduce the pipeline API for [clustering in mllib](mllib-clustering.html).
+
+## Latent Dirichlet allocation (LDA)
+
+`LDA` is implemented as an `Estimator` that supports both `EMLDAOptimizer` and `OnlineLDAOptimizer`,
+and generates a `LDAModel` as the base models. Expert users may cast a `LDAModel` generated by
+`EMLDAOptimizer` to a `DistributedLDAModel` if needed.
+
+<div class="codetabs">
+
+Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.clustering.LDA) for more details.
+
+<div data-lang="scala" markdown="1">
+{% include_example scala/org/apache/spark/examples/ml/LDAExample.scala %}
+</div>
+
+<div data-lang="java" markdown="1">
+
+Refer to the [Java API docs](api/java/org/apache/spark/ml/clustering/LDA.html) for more details.
+
+{% include_example java/org/apache/spark/examples/ml/JavaLDAExample.java %}
+</div>
+
+</div>
\ No newline at end of file
diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index be18a05361a1..6f35b30c3d4d 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -40,6 +40,7 @@ Also, some algorithms have additional capabilities in the `spark.ml` API; e.g.,
 provide class probabilities, and linear models provide model summaries.
 
 * [Feature extraction, transformation, and selection](ml-features.html)
+* [Clustering](ml-clustering.html)
 * [Decision Trees for classification and regression](ml-decision-tree.html)
 * [Ensembles](ml-ensembles.html)
 * [Linear methods with elastic net regularization](ml-linear-methods.html)
@@ -950,4 +951,4 @@ model.transform(test)
 {% endhighlight %}
 </div>
 
-</div>
+</div>
\ No newline at end of file
diff --git a/docs/mllib-guide.md b/docs/mllib-guide.md
index 91e50ccfecec..54e35fcbb15a 100644
--- a/docs/mllib-guide.md
+++ b/docs/mllib-guide.md
@@ -69,6 +69,7 @@ We list major functionality from both below, with links to detailed guides.
 concepts. It also contains sections on using algorithms within the Pipelines API, for example:
 
 * [Feature extraction, transformation, and selection](ml-features.html)
+* [Clustering](ml-clustering.html)
 * [Decision trees for classification and regression](ml-decision-tree.html)
 * [Ensembles](ml-ensembles.html)
 * [Linear methods with elastic net regularization](ml-linear-methods.html)
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
new file mode 100644
index 000000000000..b3a7d2eb2978
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
@@ -0,0 +1,94 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml;
+
+import java.util.regex.Pattern;
+
+import org.apache.spark.SparkConf;
+import org.apache.spark.api.java.JavaRDD;
+import org.apache.spark.api.java.JavaSparkContext;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.ml.clustering.LDA;
+import org.apache.spark.ml.clustering.LDAModel;
+import org.apache.spark.mllib.linalg.Vector;
+import org.apache.spark.mllib.linalg.VectorUDT;
+import org.apache.spark.mllib.linalg.Vectors;
+import org.apache.spark.sql.DataFrame;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SQLContext;
+import org.apache.spark.sql.catalyst.expressions.GenericRow;
+import org.apache.spark.sql.types.Metadata;
+import org.apache.spark.sql.types.StructField;
+import org.apache.spark.sql.types.StructType;
+
+/**
+ * An example demonstrating LDA
+ * Run with
+ * <pre>
+ * bin/run-example ml.JavaLDAExample
+ * </pre>
+ */
+public class JavaLDAExample {
+
+  private static class ParseVector implements Function<String, Row> {
+    private static final Pattern separator = Pattern.compile(" ");
+
+    @Override
+    public Row call(String line) {
+      String[] tok = separator.split(line);
+      double[] point = new double[tok.length];
+      for (int i = 0; i < tok.length; ++i) {
+        point[i] = Double.parseDouble(tok[i]);
+      }
+      Vector[] points = {Vectors.dense(point)};
+      return new GenericRow(points);
+    }
+  }
+
+  public static void main(String[] args) {
+
+    String inputFile = "data/mllib/sample_lda_data.txt";
+
+    // Parses the arguments
+    SparkConf conf = new SparkConf().setAppName("JavaLDAExample");
+    JavaSparkContext jsc = new JavaSparkContext(conf);
+    SQLContext sqlContext = new SQLContext(jsc);
+
+    // Loads data
+    JavaRDD<Row> points = jsc.textFile(inputFile).map(new ParseVector());
+    StructField[] fields = {new StructField("features", new VectorUDT(), false, Metadata.empty())};
+    StructType schema = new StructType(fields);
+    DataFrame dataset = sqlContext.createDataFrame(points, schema);
+
+    // Trains a LDA model
+    LDA lda = new LDA()
+      .setK(10)
+      .setMaxIter(10);
+    LDAModel model = lda.fit(dataset);
+
+    System.out.println(model.logLikelihood(dataset));
+    System.out.println(model.logPerplexity(dataset));
+
+    // Shows the result
+    DataFrame topics = model.describeTopics(3);
+    topics.show(false);
+    model.transform(dataset).show(false);
+
+    jsc.stop();
+  }
+}
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala
new file mode 100644
index 000000000000..419ce3d87a6a
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.ml
+
+// scalastyle:off println
+import org.apache.spark.{SparkContext, SparkConf}
+import org.apache.spark.mllib.linalg.{VectorUDT, Vectors}
+// $example on$
+import org.apache.spark.ml.clustering.LDA
+import org.apache.spark.sql.{Row, SQLContext}
+import org.apache.spark.sql.types.{StructField, StructType}
+// $example off$
+
+/**
+ * An example demonstrating a LDA of ML pipeline.
+ * Run with
+ * {{{
+ * bin/run-example ml.LDAExample
+ * }}}
+ */
+object LDAExample {
+
+  final val FEATURES_COL = "features"
+
+  def main(args: Array[String]): Unit = {
+
+    val input = "data/mllib/sample_lda_data.txt"
+    // Creates a Spark context and a SQL context
+    val conf = new SparkConf().setAppName(s"${this.getClass.getSimpleName}")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+
+    // $example on$
+    // Loads data
+    val rowRDD = sc.textFile(input).filter(_.nonEmpty)
+      .map(_.split(" ").map(_.toDouble)).map(Vectors.dense).map(Row(_))
+    val schema = StructType(Array(StructField(FEATURES_COL, new VectorUDT, false)))
+    val dataset = sqlContext.createDataFrame(rowRDD, schema)
+
+    // Trains a LDA model
+    val lda = new LDA()
+      .setK(10)
+      .setMaxIter(10)
+      .setFeaturesCol(FEATURES_COL)
+    val model = lda.fit(dataset)
+    val transformed = model.transform(dataset)
+
+    val ll = model.logLikelihood(dataset)
+    val lp = model.logPerplexity(dataset)
+
+    // describeTopics
+    val topics = model.describeTopics(3)
+
+    // Shows the result
+    topics.show(false)
+    transformed.show(false)
+
+    // $example off$
+    sc.stop()
+  }
+}
+// scalastyle:on println

From bef361c589c0a38740232fd8d0a45841e4fc969a Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Fri, 20 Nov 2015 11:20:47 -0800
Subject: [PATCH 822/896] [SPARK-11876][SQL] Support printSchema in DataSet API

DataSet APIs look great! However, I am lost when doing multiple level joins.  For example,
```
val ds1 = Seq(("a", 1), ("b", 2)).toDS().as("a")
val ds2 = Seq(("a", 1), ("b", 2)).toDS().as("b")
val ds3 = Seq(("a", 1), ("b", 2)).toDS().as("c")

ds1.joinWith(ds2, $"a._2" === $"b._2").as("ab").joinWith(ds3, $"ab._1._2" === $"c._2").printSchema()
```

The printed schema is like
```
root
 |-- _1: struct (nullable = true)
 |    |-- _1: struct (nullable = true)
 |    |    |-- _1: string (nullable = true)
 |    |    |-- _2: integer (nullable = true)
 |    |-- _2: struct (nullable = true)
 |    |    |-- _1: string (nullable = true)
 |    |    |-- _2: integer (nullable = true)
 |-- _2: struct (nullable = true)
 |    |-- _1: string (nullable = true)
 |    |-- _2: integer (nullable = true)
```

Personally, I think we need the printSchema function. Sometimes, I do not know how to specify the column, especially when their data types are mixed. For example, if I want to write the following select for the above multi-level join, I have to know the schema:
```
newDS.select(expr("_1._2._2 + 1").as[Int]).collect()
```

marmbrus rxin cloud-fan  Do you have the same feeling?

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9855 from gatorsmile/printSchemaDataSet.
---
 .../src/main/scala/org/apache/spark/sql/DataFrame.scala  | 9 ---------
 .../scala/org/apache/spark/sql/execution/Queryable.scala | 9 +++++++++
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 98358127e270..7abcecaa2880 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -299,15 +299,6 @@ class DataFrame private[sql](
    */
   def columns: Array[String] = schema.fields.map(_.name)
 
-  /**
-   * Prints the schema to the console in a nice tree format.
-   * @group basic
-   * @since 1.3.0
-   */
-  // scalastyle:off println
-  def printSchema(): Unit = println(schema.treeString)
-  // scalastyle:on println
-
   /**
    * Returns true if the `collect` and `take` methods can be run locally
    * (without any Spark executors).
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
index e86a52c149a2..321e2c783537 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
@@ -37,6 +37,15 @@ private[sql] trait Queryable {
     }
   }
 
+  /**
+   * Prints the schema to the console in a nice tree format.
+   * @group basic
+   * @since 1.3.0
+   */
+  // scalastyle:off println
+  def printSchema(): Unit = println(schema.treeString)
+  // scalastyle:on println
+
   /**
    * Prints the plans (logical and physical) to the console for debugging purposes.
    * @since 1.3.0

From 60bfb113325c71491f8dcf98b6036b0caa2144fe Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Fri, 20 Nov 2015 11:43:45 -0800
Subject: [PATCH 823/896] [SPARK-11817][SQL] Truncating the fractional seconds
 to prevent inserting a NULL

JIRA: https://issues.apache.org/jira/browse/SPARK-11817

Instead of return None, we should truncate the fractional seconds to prevent inserting NULL.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9834 from viirya/truncate-fractional-sec.
---
 .../apache/spark/sql/catalyst/util/DateTimeUtils.scala    | 5 +++++
 .../spark/sql/catalyst/util/DateTimeUtilsSuite.scala      | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
index 17a5527f3fb2..2b9388291948 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
@@ -327,6 +327,11 @@ object DateTimeUtils {
       return None
     }
 
+    // Instead of return None, we truncate the fractional seconds to prevent inserting NULL
+    if (segments(6) > 999999) {
+      segments(6) = segments(6).toString.take(6).toInt
+    }
+
     if (segments(3) < 0 || segments(3) > 23 || segments(4) < 0 || segments(4) > 59 ||
         segments(5) < 0 || segments(5) > 59 || segments(6) < 0 || segments(6) > 999999 ||
         segments(7) < 0 || segments(7) > 23 || segments(8) < 0 || segments(8) > 59) {
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
index faca128badfd..0ce5a2fb6950 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DateTimeUtilsSuite.scala
@@ -343,6 +343,14 @@ class DateTimeUtilsSuite extends SparkFunSuite {
       UTF8String.fromString("2015-03-18T12:03.17-0:70")).isEmpty)
     assert(stringToTimestamp(
       UTF8String.fromString("2015-03-18T12:03.17-1:0:0")).isEmpty)
+
+    // Truncating the fractional seconds
+    c = Calendar.getInstance(TimeZone.getTimeZone("GMT+00:00"))
+    c.set(2015, 2, 18, 12, 3, 17)
+    c.set(Calendar.MILLISECOND, 0)
+    assert(stringToTimestamp(
+      UTF8String.fromString("2015-03-18T12:03:17.123456789+0:00")).get ===
+        c.getTimeInMillis * 1000 + 123456)
   }
 
   test("hours") {

From 3b9d2a347f9c796b90852173d84189834e499e25 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 20 Nov 2015 12:04:42 -0800
Subject: [PATCH 824/896] [SPARK-11819][SQL] nice error message for missing
 encoder

before this PR, when users try to get an encoder for an un-supported class, they will only get a very simple error message like `Encoder for type xxx is not supported`.

After this PR, the error message become more friendly, for example:
```
No Encoder found for abc.xyz.NonEncodable
- array element class: "abc.xyz.NonEncodable"
- field (class: "scala.Array", name: "arrayField")
- root class: "abc.xyz.AnotherClass"
```

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9810 from cloud-fan/error-message.
---
 .../spark/sql/catalyst/ScalaReflection.scala  | 90 ++++++++++++++-----
 .../encoders/EncoderErrorMessageSuite.scala   | 62 +++++++++++++
 2 files changed, 129 insertions(+), 23 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 33ae700706da..918050b531c0 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -63,7 +63,7 @@ object ScalaReflection extends ScalaReflection {
       case t if t <:< definitions.BooleanTpe => BooleanType
       case t if t <:< localTypeOf[Array[Byte]] => BinaryType
       case _ =>
-        val className: String = tpe.erasure.typeSymbol.asClass.fullName
+        val className = getClassNameFromType(tpe)
         className match {
           case "scala.Array" =>
             val TypeRef(_, _, Seq(elementType)) = tpe
@@ -320,9 +320,23 @@ object ScalaReflection extends ScalaReflection {
     }
   }
 
-  /** Returns expressions for extracting all the fields from the given type. */
+  /**
+   * Returns expressions for extracting all the fields from the given type.
+   *
+   * If the given type is not supported, i.e. there is no encoder can be built for this type,
+   * an [[UnsupportedOperationException]] will be thrown with detailed error message to explain
+   * the type path walked so far and which class we are not supporting.
+   * There are 4 kinds of type path:
+   *  * the root type: `root class: "abc.xyz.MyClass"`
+   *  * the value type of [[Option]]: `option value class: "abc.xyz.MyClass"`
+   *  * the element type of [[Array]] or [[Seq]]: `array element class: "abc.xyz.MyClass"`
+   *  * the field of [[Product]]: `field (class: "abc.xyz.MyClass", name: "myField")`
+   */
   def extractorsFor[T : TypeTag](inputObject: Expression): CreateNamedStruct = {
-    extractorFor(inputObject, localTypeOf[T]) match {
+    val tpe = localTypeOf[T]
+    val clsName = getClassNameFromType(tpe)
+    val walkedTypePath = s"""- root class: "${clsName}"""" :: Nil
+    extractorFor(inputObject, tpe, walkedTypePath) match {
       case s: CreateNamedStruct => s
       case other => CreateNamedStruct(expressions.Literal("value") :: other :: Nil)
     }
@@ -331,7 +345,28 @@ object ScalaReflection extends ScalaReflection {
   /** Helper for extracting internal fields from a case class. */
   private def extractorFor(
       inputObject: Expression,
-      tpe: `Type`): Expression = ScalaReflectionLock.synchronized {
+      tpe: `Type`,
+      walkedTypePath: Seq[String]): Expression = ScalaReflectionLock.synchronized {
+
+    def toCatalystArray(input: Expression, elementType: `Type`): Expression = {
+      val externalDataType = dataTypeFor(elementType)
+      val Schema(catalystType, nullable) = silentSchemaFor(elementType)
+      if (isNativeType(catalystType)) {
+        NewInstance(
+          classOf[GenericArrayData],
+          input :: Nil,
+          dataType = ArrayType(catalystType, nullable))
+      } else {
+        val clsName = getClassNameFromType(elementType)
+        val newPath = s"""- array element class: "$clsName"""" +: walkedTypePath
+        // `MapObjects` will run `extractorFor` lazily, we need to eagerly call `extractorFor` here
+        // to trigger the type check.
+        extractorFor(inputObject, elementType, newPath)
+
+        MapObjects(extractorFor(_, elementType, newPath), input, externalDataType)
+      }
+    }
+
     if (!inputObject.dataType.isInstanceOf[ObjectType]) {
       inputObject
     } else {
@@ -378,15 +413,16 @@ object ScalaReflection extends ScalaReflection {
 
             // For non-primitives, we can just extract the object from the Option and then recurse.
             case other =>
-              val className: String = optType.erasure.typeSymbol.asClass.fullName
+              val className = getClassNameFromType(optType)
               val classObj = Utils.classForName(className)
               val optionObjectType = ObjectType(classObj)
+              val newPath = s"""- option value class: "$className"""" +: walkedTypePath
 
               val unwrapped = UnwrapOption(optionObjectType, inputObject)
               expressions.If(
                 IsNull(unwrapped),
-                expressions.Literal.create(null, schemaFor(optType).dataType),
-                extractorFor(unwrapped, optType))
+                expressions.Literal.create(null, silentSchemaFor(optType).dataType),
+                extractorFor(unwrapped, optType, newPath))
           }
 
         case t if t <:< localTypeOf[Product] =>
@@ -412,7 +448,10 @@ object ScalaReflection extends ScalaReflection {
             val fieldName = p.name.toString
             val fieldType = p.typeSignature.substituteTypes(formalTypeArgs, actualTypeArgs)
             val fieldValue = Invoke(inputObject, fieldName, dataTypeFor(fieldType))
-            expressions.Literal(fieldName) :: extractorFor(fieldValue, fieldType) :: Nil
+            val clsName = getClassNameFromType(fieldType)
+            val newPath = s"""- field (class: "$clsName", name: "$fieldName")""" +: walkedTypePath
+
+            expressions.Literal(fieldName) :: extractorFor(fieldValue, fieldType, newPath) :: Nil
           })
 
         case t if t <:< localTypeOf[Array[_]] =>
@@ -500,23 +539,11 @@ object ScalaReflection extends ScalaReflection {
           Invoke(inputObject, "booleanValue", BooleanType)
 
         case other =>
-          throw new UnsupportedOperationException(s"Extractor for type $other is not supported")
+          throw new UnsupportedOperationException(
+            s"No Encoder found for $tpe\n" + walkedTypePath.mkString("\n"))
       }
     }
   }
-
-  private def toCatalystArray(input: Expression, elementType: `Type`): Expression = {
-    val externalDataType = dataTypeFor(elementType)
-    val Schema(catalystType, nullable) = schemaFor(elementType)
-    if (isNativeType(catalystType)) {
-      NewInstance(
-        classOf[GenericArrayData],
-        input :: Nil,
-        dataType = ArrayType(catalystType, nullable))
-    } else {
-      MapObjects(extractorFor(_, elementType), input, externalDataType)
-    }
-  }
 }
 
 /**
@@ -561,7 +588,7 @@ trait ScalaReflection {
 
   /** Returns a catalyst DataType and its nullability for the given Scala Type using reflection. */
   def schemaFor(tpe: `Type`): Schema = ScalaReflectionLock.synchronized {
-    val className: String = tpe.erasure.typeSymbol.asClass.fullName
+    val className = getClassNameFromType(tpe)
     tpe match {
       case t if Utils.classIsLoadable(className) &&
         Utils.classForName(className).isAnnotationPresent(classOf[SQLUserDefinedType]) =>
@@ -637,6 +664,23 @@ trait ScalaReflection {
     }
   }
 
+  /**
+   * Returns a catalyst DataType and its nullability for the given Scala Type using reflection.
+   *
+   * Unlike `schemaFor`, this method won't throw exception for un-supported type, it will return
+   * `NullType` silently instead.
+   */
+  private def silentSchemaFor(tpe: `Type`): Schema = try {
+    schemaFor(tpe)
+  } catch {
+    case _: UnsupportedOperationException => Schema(NullType, nullable = true)
+  }
+
+  /** Returns the full class name for a type. */
+  private def getClassNameFromType(tpe: `Type`): String = {
+    tpe.erasure.typeSymbol.asClass.fullName
+  }
+
   /**
    * Returns classes of input parameters of scala function object.
    */
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala
index 0b2a10bb04c1..8c766ef82992 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/EncoderErrorMessageSuite.scala
@@ -17,9 +17,22 @@
 
 package org.apache.spark.sql.catalyst.encoders
 
+import scala.reflect.ClassTag
+
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.sql.Encoders
 
+class NonEncodable(i: Int)
+
+case class ComplexNonEncodable1(name1: NonEncodable)
+
+case class ComplexNonEncodable2(name2: ComplexNonEncodable1)
+
+case class ComplexNonEncodable3(name3: Option[NonEncodable])
+
+case class ComplexNonEncodable4(name4: Array[NonEncodable])
+
+case class ComplexNonEncodable5(name5: Option[Array[NonEncodable]])
 
 class EncoderErrorMessageSuite extends SparkFunSuite {
 
@@ -37,4 +50,53 @@ class EncoderErrorMessageSuite extends SparkFunSuite {
     intercept[UnsupportedOperationException] { Encoders.javaSerialization[Long] }
     intercept[UnsupportedOperationException] { Encoders.javaSerialization[Char] }
   }
+
+  test("nice error message for missing encoder") {
+    val errorMsg1 =
+      intercept[UnsupportedOperationException](ExpressionEncoder[ComplexNonEncodable1]).getMessage
+    assert(errorMsg1.contains(
+      s"""root class: "${clsName[ComplexNonEncodable1]}""""))
+    assert(errorMsg1.contains(
+      s"""field (class: "${clsName[NonEncodable]}", name: "name1")"""))
+
+    val errorMsg2 =
+      intercept[UnsupportedOperationException](ExpressionEncoder[ComplexNonEncodable2]).getMessage
+    assert(errorMsg2.contains(
+      s"""root class: "${clsName[ComplexNonEncodable2]}""""))
+    assert(errorMsg2.contains(
+      s"""field (class: "${clsName[ComplexNonEncodable1]}", name: "name2")"""))
+    assert(errorMsg1.contains(
+      s"""field (class: "${clsName[NonEncodable]}", name: "name1")"""))
+
+    val errorMsg3 =
+      intercept[UnsupportedOperationException](ExpressionEncoder[ComplexNonEncodable3]).getMessage
+    assert(errorMsg3.contains(
+      s"""root class: "${clsName[ComplexNonEncodable3]}""""))
+    assert(errorMsg3.contains(
+      s"""field (class: "scala.Option", name: "name3")"""))
+    assert(errorMsg3.contains(
+      s"""option value class: "${clsName[NonEncodable]}""""))
+
+    val errorMsg4 =
+      intercept[UnsupportedOperationException](ExpressionEncoder[ComplexNonEncodable4]).getMessage
+    assert(errorMsg4.contains(
+      s"""root class: "${clsName[ComplexNonEncodable4]}""""))
+    assert(errorMsg4.contains(
+      s"""field (class: "scala.Array", name: "name4")"""))
+    assert(errorMsg4.contains(
+      s"""array element class: "${clsName[NonEncodable]}""""))
+
+    val errorMsg5 =
+      intercept[UnsupportedOperationException](ExpressionEncoder[ComplexNonEncodable5]).getMessage
+    assert(errorMsg5.contains(
+      s"""root class: "${clsName[ComplexNonEncodable5]}""""))
+    assert(errorMsg5.contains(
+      s"""field (class: "scala.Option", name: "name5")"""))
+    assert(errorMsg5.contains(
+      s"""option value class: "scala.Array""""))
+    assert(errorMsg5.contains(
+      s"""array element class: "${clsName[NonEncodable]}""""))
+  }
+
+  private def clsName[T : ClassTag]: String = implicitly[ClassTag[T]].runtimeClass.getName
 }

From 652def318e47890bd0a0977dc982cc07f99fb06a Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Fri, 20 Nov 2015 13:17:35 -0800
Subject: [PATCH 825/896] [SPARK-11650] Reduce RPC timeouts to speed up slow
 AkkaUtilsSuite test

This patch reduces some RPC timeouts in order to speed up the slow "AkkaUtilsSuite.remote fetch ssl on - untrusted server", which used to take two minutes to run.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9869 from JoshRosen/SPARK-11650.
---
 core/src/test/scala/org/apache/spark/util/AkkaUtilsSuite.scala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/core/src/test/scala/org/apache/spark/util/AkkaUtilsSuite.scala b/core/src/test/scala/org/apache/spark/util/AkkaUtilsSuite.scala
index 61601016e005..0af4b6098bb0 100644
--- a/core/src/test/scala/org/apache/spark/util/AkkaUtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/util/AkkaUtilsSuite.scala
@@ -340,10 +340,11 @@ class AkkaUtilsSuite extends SparkFunSuite with LocalSparkContext with ResetSyst
       new MapOutputTrackerMasterEndpoint(rpcEnv, masterTracker, conf))
 
     val slaveConf = sparkSSLConfig()
+      .set("spark.rpc.askTimeout", "5s")
+      .set("spark.rpc.lookupTimeout", "5s")
     val securityManagerBad = new SecurityManager(slaveConf)
 
     val slaveRpcEnv = RpcEnv.create("spark-slave", hostname, 0, slaveConf, securityManagerBad)
-    val slaveTracker = new MapOutputTrackerWorker(conf)
     try {
       slaveRpcEnv.setupEndpointRef("spark", rpcEnv.address, MapOutputTracker.ENDPOINT_NAME)
       fail("should receive either ActorNotFound or TimeoutException")

From 9ed4ad4265cf9d3135307eb62dae6de0b220fc21 Mon Sep 17 00:00:00 2001
From: Nong Li <nong@databricks.com>
Date: Fri, 20 Nov 2015 14:19:34 -0800
Subject: [PATCH 826/896] [SPARK-11724][SQL] Change casting between int and
 timestamp to consistently treat int in seconds.

Hive has since changed this behavior as well. https://issues.apache.org/jira/browse/HIVE-3454

Author: Nong Li <nong@databricks.com>
Author: Nong Li <nongli@gmail.com>
Author: Yin Huai <yhuai@databricks.com>

Closes #9685 from nongli/spark-11724.
---
 .../spark/sql/catalyst/expressions/Cast.scala |  6 ++--
 .../sql/catalyst/expressions/CastSuite.scala  | 16 +++++----
 .../apache/spark/sql/DateFunctionsSuite.scala |  3 ++
 ...esting-0-237a6af90a857da1efcbe98f6bbbf9d6} |  2 +-
 ... cast #3-0-76ee270337f664b36cacfc6528ac109 |  1 -
 ...cast #5-0-dbd7bcd167d322d6617b884c02c7f247 |  1 -
 ...cast #7-0-1d70654217035f8ce5f64344f4c5a80f |  1 -
 .../sql/hive/execution/HiveQuerySuite.scala   | 34 +++++++++++++------
 8 files changed, 39 insertions(+), 25 deletions(-)
 rename sql/hive/src/test/resources/golden/{constant null testing-0-9a02bc7de09bcabcbd4c91f54a814c20 => constant null testing-0-237a6af90a857da1efcbe98f6bbbf9d6} (52%)
 delete mode 100644 sql/hive/src/test/resources/golden/timestamp cast #3-0-76ee270337f664b36cacfc6528ac109
 delete mode 100644 sql/hive/src/test/resources/golden/timestamp cast #5-0-dbd7bcd167d322d6617b884c02c7f247
 delete mode 100644 sql/hive/src/test/resources/golden/timestamp cast #7-0-1d70654217035f8ce5f64344f4c5a80f

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
index 5564e242b047..533d17ea5c17 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
@@ -204,8 +204,8 @@ case class Cast(child: Expression, dataType: DataType)
     if (d.isNaN || d.isInfinite) null else (d * 1000000L).toLong
   }
 
-  // converting milliseconds to us
-  private[this] def longToTimestamp(t: Long): Long = t * 1000L
+  // converting seconds to us
+  private[this] def longToTimestamp(t: Long): Long = t * 1000000L
   // converting us to seconds
   private[this] def timestampToLong(ts: Long): Long = math.floor(ts.toDouble / 1000000L).toLong
   // converting us to seconds in double
@@ -647,7 +647,7 @@ case class Cast(child: Expression, dataType: DataType)
 
   private[this] def decimalToTimestampCode(d: String): String =
     s"($d.toBigDecimal().bigDecimal().multiply(new java.math.BigDecimal(1000000L))).longValue()"
-  private[this] def longToTimeStampCode(l: String): String = s"$l * 1000L"
+  private[this] def longToTimeStampCode(l: String): String = s"$l * 1000000L"
   private[this] def timestampToIntegerCode(ts: String): String =
     s"java.lang.Math.floor((double) $ts / 1000000L)"
   private[this] def timestampToDoubleCode(ts: String): String = s"$ts / 1000000.0"
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
index f4db4da7646f..ab77a764483e 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
@@ -258,8 +258,8 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper {
 
   test("cast from int 2") {
     checkEvaluation(cast(1, LongType), 1.toLong)
-    checkEvaluation(cast(cast(1000, TimestampType), LongType), 1.toLong)
-    checkEvaluation(cast(cast(-1200, TimestampType), LongType), -2.toLong)
+    checkEvaluation(cast(cast(1000, TimestampType), LongType), 1000.toLong)
+    checkEvaluation(cast(cast(-1200, TimestampType), LongType), -1200.toLong)
 
     checkEvaluation(cast(123, DecimalType.USER_DEFAULT), Decimal(123))
     checkEvaluation(cast(123, DecimalType(3, 0)), Decimal(123))
@@ -348,14 +348,14 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper {
     checkEvaluation(
       cast(cast(cast(cast(cast(cast("5", ByteType), TimestampType),
         DecimalType.SYSTEM_DEFAULT), LongType), StringType), ShortType),
-      0.toShort)
+      5.toShort)
     checkEvaluation(
       cast(cast(cast(cast(cast(cast("5", TimestampType), ByteType),
         DecimalType.SYSTEM_DEFAULT), LongType), StringType), ShortType),
       null)
     checkEvaluation(cast(cast(cast(cast(cast(cast("5", DecimalType.SYSTEM_DEFAULT),
       ByteType), TimestampType), LongType), StringType), ShortType),
-      0.toShort)
+      5.toShort)
 
     checkEvaluation(cast("23", DoubleType), 23d)
     checkEvaluation(cast("23", IntegerType), 23)
@@ -479,10 +479,12 @@ class CastSuite extends SparkFunSuite with ExpressionEvalHelper {
     checkEvaluation(cast(ts, LongType), 15.toLong)
     checkEvaluation(cast(ts, FloatType), 15.003f)
     checkEvaluation(cast(ts, DoubleType), 15.003)
-    checkEvaluation(cast(cast(tss, ShortType), TimestampType), DateTimeUtils.fromJavaTimestamp(ts))
+    checkEvaluation(cast(cast(tss, ShortType), TimestampType),
+      DateTimeUtils.fromJavaTimestamp(ts) * 1000)
     checkEvaluation(cast(cast(tss, IntegerType), TimestampType),
-      DateTimeUtils.fromJavaTimestamp(ts))
-    checkEvaluation(cast(cast(tss, LongType), TimestampType), DateTimeUtils.fromJavaTimestamp(ts))
+      DateTimeUtils.fromJavaTimestamp(ts) * 1000)
+    checkEvaluation(cast(cast(tss, LongType), TimestampType),
+      DateTimeUtils.fromJavaTimestamp(ts) * 1000)
     checkEvaluation(
       cast(cast(millis.toFloat / 1000, TimestampType), FloatType),
       millis.toFloat / 1000)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
index 241cbd011507..a61c3aa48a73 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DateFunctionsSuite.scala
@@ -448,6 +448,9 @@ class DateFunctionsSuite extends QueryTest with SharedSQLContext {
       Row(date1.getTime / 1000L), Row(date2.getTime / 1000L)))
     checkAnswer(df.selectExpr(s"unix_timestamp(s, '$fmt')"), Seq(
       Row(ts1.getTime / 1000L), Row(ts2.getTime / 1000L)))
+
+    val now = sql("select unix_timestamp()").collect().head.getLong(0)
+    checkAnswer(sql(s"select cast ($now as timestamp)"), Row(new java.util.Date(now * 1000)))
   }
 
   test("to_unix_timestamp") {
diff --git a/sql/hive/src/test/resources/golden/constant null testing-0-9a02bc7de09bcabcbd4c91f54a814c20 b/sql/hive/src/test/resources/golden/constant null testing-0-237a6af90a857da1efcbe98f6bbbf9d6
similarity index 52%
rename from sql/hive/src/test/resources/golden/constant null testing-0-9a02bc7de09bcabcbd4c91f54a814c20
rename to sql/hive/src/test/resources/golden/constant null testing-0-237a6af90a857da1efcbe98f6bbbf9d6
index 7c41615f8c18..a01c2622c68e 100644
--- a/sql/hive/src/test/resources/golden/constant null testing-0-9a02bc7de09bcabcbd4c91f54a814c20	
+++ b/sql/hive/src/test/resources/golden/constant null testing-0-237a6af90a857da1efcbe98f6bbbf9d6	
@@ -1 +1 @@
-1	NULL	1	NULL	1.0	NULL	true	NULL	1	NULL	1.0	NULL	1	NULL	1	NULL	1	NULL	1970-01-01	NULL	1969-12-31 16:00:00.001	NULL	1	NULL
+1	NULL	1	NULL	1.0	NULL	true	NULL	1	NULL	1.0	NULL	1	NULL	1	NULL	1	NULL	1970-01-01	NULL	NULL	1	NULL
diff --git a/sql/hive/src/test/resources/golden/timestamp cast #3-0-76ee270337f664b36cacfc6528ac109 b/sql/hive/src/test/resources/golden/timestamp cast #3-0-76ee270337f664b36cacfc6528ac109
deleted file mode 100644
index d00491fd7e5b..000000000000
--- a/sql/hive/src/test/resources/golden/timestamp cast #3-0-76ee270337f664b36cacfc6528ac109	
+++ /dev/null
@@ -1 +0,0 @@
-1
diff --git a/sql/hive/src/test/resources/golden/timestamp cast #5-0-dbd7bcd167d322d6617b884c02c7f247 b/sql/hive/src/test/resources/golden/timestamp cast #5-0-dbd7bcd167d322d6617b884c02c7f247
deleted file mode 100644
index 84a31a5a6970..000000000000
--- a/sql/hive/src/test/resources/golden/timestamp cast #5-0-dbd7bcd167d322d6617b884c02c7f247	
+++ /dev/null
@@ -1 +0,0 @@
--0.001
diff --git a/sql/hive/src/test/resources/golden/timestamp cast #7-0-1d70654217035f8ce5f64344f4c5a80f b/sql/hive/src/test/resources/golden/timestamp cast #7-0-1d70654217035f8ce5f64344f4c5a80f
deleted file mode 100644
index 3fbedf693b51..000000000000
--- a/sql/hive/src/test/resources/golden/timestamp cast #7-0-1d70654217035f8ce5f64344f4c5a80f	
+++ /dev/null
@@ -1 +0,0 @@
--2
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
index f0a7a6cc7a1e..8a5acaf3e10b 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala
@@ -18,6 +18,7 @@
 package org.apache.spark.sql.hive.execution
 
 import java.io.File
+import java.sql.Timestamp
 import java.util.{Locale, TimeZone}
 
 import scala.util.Try
@@ -248,12 +249,17 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
       |IF(TRUE, CAST(NULL AS BINARY), CAST("1" AS BINARY)) AS COL18,
       |IF(FALSE, CAST(NULL AS DATE), CAST("1970-01-01" AS DATE)) AS COL19,
       |IF(TRUE, CAST(NULL AS DATE), CAST("1970-01-01" AS DATE)) AS COL20,
-      |IF(FALSE, CAST(NULL AS TIMESTAMP), CAST(1 AS TIMESTAMP)) AS COL21,
-      |IF(TRUE, CAST(NULL AS TIMESTAMP), CAST(1 AS TIMESTAMP)) AS COL22,
-      |IF(FALSE, CAST(NULL AS DECIMAL), CAST(1 AS DECIMAL)) AS COL23,
-      |IF(TRUE, CAST(NULL AS DECIMAL), CAST(1 AS DECIMAL)) AS COL24
+      |IF(TRUE, CAST(NULL AS TIMESTAMP), CAST(1 AS TIMESTAMP)) AS COL21,
+      |IF(FALSE, CAST(NULL AS DECIMAL), CAST(1 AS DECIMAL)) AS COL22,
+      |IF(TRUE, CAST(NULL AS DECIMAL), CAST(1 AS DECIMAL)) AS COL23
       |FROM src LIMIT 1""".stripMargin)
 
+  test("constant null testing timestamp") {
+    val r1 = sql("SELECT IF(FALSE, CAST(NULL AS TIMESTAMP), CAST(1 AS TIMESTAMP)) AS COL20")
+      .collect().head
+    assert(new Timestamp(1000) == r1.getTimestamp(0))
+  }
+
   createQueryTest("constant array",
   """
     |SELECT sort_array(
@@ -603,26 +609,32 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter {
   // Jdk version leads to different query output for double, so not use createQueryTest here
   test("timestamp cast #1") {
     val res = sql("SELECT CAST(CAST(1 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1").collect().head
-    assert(0.001 == res.getDouble(0))
+    assert(1 == res.getDouble(0))
   }
 
   createQueryTest("timestamp cast #2",
     "SELECT CAST(CAST(1.2 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1")
 
-  createQueryTest("timestamp cast #3",
-    "SELECT CAST(CAST(1200 AS TIMESTAMP) AS INT) FROM src LIMIT 1")
+  test("timestamp cast #3") {
+    val res = sql("SELECT CAST(CAST(1200 AS TIMESTAMP) AS INT) FROM src LIMIT 1").collect().head
+    assert(1200 == res.getInt(0))
+  }
 
   createQueryTest("timestamp cast #4",
     "SELECT CAST(CAST(1.2 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1")
 
-  createQueryTest("timestamp cast #5",
-    "SELECT CAST(CAST(-1 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1")
+  test("timestamp cast #5") {
+    val res = sql("SELECT CAST(CAST(-1 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1").collect().head
+    assert(-1 == res.get(0))
+  }
 
   createQueryTest("timestamp cast #6",
     "SELECT CAST(CAST(-1.2 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1")
 
-  createQueryTest("timestamp cast #7",
-    "SELECT CAST(CAST(-1200 AS TIMESTAMP) AS INT) FROM src LIMIT 1")
+  test("timestamp cast #7") {
+    val res = sql("SELECT CAST(CAST(-1200 AS TIMESTAMP) AS INT) FROM src LIMIT 1").collect().head
+    assert(-1200 == res.getInt(0))
+  }
 
   createQueryTest("timestamp cast #8",
     "SELECT CAST(CAST(-1.2 AS TIMESTAMP) AS DOUBLE) FROM src LIMIT 1")

From be7a2cfd978143f6f265eca63e9e24f755bc9f22 Mon Sep 17 00:00:00 2001
From: Shixiong Zhu <shixiong@databricks.com>
Date: Fri, 20 Nov 2015 14:23:01 -0800
Subject: [PATCH 827/896] [SPARK-11870][STREAMING][PYSPARK] Rethrow the
 exceptions in TransformFunction and TransformFunctionSerializer

TransformFunction and TransformFunctionSerializer don't rethrow the exception, so when any exception happens, it just return None. This will cause some weird NPE and confuse people.

Author: Shixiong Zhu <shixiong@databricks.com>

Closes #9847 from zsxwing/pyspark-streaming-exception.
---
 python/pyspark/streaming/tests.py | 16 ++++++++++++++++
 python/pyspark/streaming/util.py  |  3 +++
 2 files changed, 19 insertions(+)

diff --git a/python/pyspark/streaming/tests.py b/python/pyspark/streaming/tests.py
index 3403f6d20d78..a0e0267cafa5 100644
--- a/python/pyspark/streaming/tests.py
+++ b/python/pyspark/streaming/tests.py
@@ -403,6 +403,22 @@ def func(dstream):
         expected = [[('k', v)] for v in expected]
         self._test_func(input, func, expected)
 
+    def test_failed_func(self):
+        input = [self.sc.parallelize([d], 1) for d in range(4)]
+        input_stream = self.ssc.queueStream(input)
+
+        def failed_func(i):
+            raise ValueError("failed")
+
+        input_stream.map(failed_func).pprint()
+        self.ssc.start()
+        try:
+            self.ssc.awaitTerminationOrTimeout(10)
+        except:
+            return
+
+        self.fail("a failed func should throw an error")
+
 
 class StreamingListenerTests(PySparkStreamingTestCase):
 
diff --git a/python/pyspark/streaming/util.py b/python/pyspark/streaming/util.py
index b20613b1283b..767c732eb90b 100644
--- a/python/pyspark/streaming/util.py
+++ b/python/pyspark/streaming/util.py
@@ -64,6 +64,7 @@ def call(self, milliseconds, jrdds):
                 return r._jrdd
         except Exception:
             traceback.print_exc()
+            raise
 
     def __repr__(self):
         return "TransformFunction(%s)" % self.func
@@ -95,6 +96,7 @@ def dumps(self, id):
             return bytearray(self.serializer.dumps((func.func, func.deserializers)))
         except Exception:
             traceback.print_exc()
+            raise
 
     def loads(self, data):
         try:
@@ -102,6 +104,7 @@ def loads(self, data):
             return TransformFunction(self.ctx, f, *deserializers)
         except Exception:
             traceback.print_exc()
+            raise
 
     def __repr__(self):
         return "TransformFunctionSerializer(%s)" % self.serializer

From 89fd9bd06160fa89dedbf685bfe159ffe4a06ec6 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Fri, 20 Nov 2015 14:31:26 -0800
Subject: [PATCH 828/896] [SPARK-11887] Close PersistenceEngine at the end of
 PersistenceEngineSuite tests

In PersistenceEngineSuite, we do not call `close()` on the PersistenceEngine at the end of the test. For the ZooKeeperPersistenceEngine, this causes us to leak a ZooKeeper client, causing the logs of unrelated tests to be periodically spammed with connection error messages from that client:

```
15/11/20 05:13:35.789 pool-1-thread-1-ScalaTest-running-PersistenceEngineSuite-SendThread(localhost:15741) INFO ClientCnxn: Opening socket connection to server localhost/127.0.0.1:15741. Will not attempt to authenticate using SASL (unknown error)
15/11/20 05:13:35.790 pool-1-thread-1-ScalaTest-running-PersistenceEngineSuite-SendThread(localhost:15741) WARN ClientCnxn: Session 0x15124ff48dd0000 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
	at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1068)
```

This patch fixes this by using a `finally` block.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9864 from JoshRosen/close-zookeeper-client-in-tests.
---
 .../master/PersistenceEngineSuite.scala       | 100 +++++++++---------
 1 file changed, 52 insertions(+), 48 deletions(-)

diff --git a/core/src/test/scala/org/apache/spark/deploy/master/PersistenceEngineSuite.scala b/core/src/test/scala/org/apache/spark/deploy/master/PersistenceEngineSuite.scala
index 34775577de8a..7a4472867568 100644
--- a/core/src/test/scala/org/apache/spark/deploy/master/PersistenceEngineSuite.scala
+++ b/core/src/test/scala/org/apache/spark/deploy/master/PersistenceEngineSuite.scala
@@ -63,56 +63,60 @@ class PersistenceEngineSuite extends SparkFunSuite {
       conf: SparkConf, persistenceEngineCreator: Serializer => PersistenceEngine): Unit = {
     val serializer = new JavaSerializer(conf)
     val persistenceEngine = persistenceEngineCreator(serializer)
-    persistenceEngine.persist("test_1", "test_1_value")
-    assert(Seq("test_1_value") === persistenceEngine.read[String]("test_"))
-    persistenceEngine.persist("test_2", "test_2_value")
-    assert(Set("test_1_value", "test_2_value") === persistenceEngine.read[String]("test_").toSet)
-    persistenceEngine.unpersist("test_1")
-    assert(Seq("test_2_value") === persistenceEngine.read[String]("test_"))
-    persistenceEngine.unpersist("test_2")
-    assert(persistenceEngine.read[String]("test_").isEmpty)
-
-    // Test deserializing objects that contain RpcEndpointRef
-    val testRpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
     try {
-      // Create a real endpoint so that we can test RpcEndpointRef deserialization
-      val workerEndpoint = testRpcEnv.setupEndpoint("worker", new RpcEndpoint {
-        override val rpcEnv: RpcEnv = testRpcEnv
-      })
-
-      val workerToPersist = new WorkerInfo(
-        id = "test_worker",
-        host = "127.0.0.1",
-        port = 10000,
-        cores = 0,
-        memory = 0,
-        endpoint = workerEndpoint,
-        webUiPort = 0,
-        publicAddress = ""
-      )
-
-      persistenceEngine.addWorker(workerToPersist)
-
-      val (storedApps, storedDrivers, storedWorkers) =
-        persistenceEngine.readPersistedData(testRpcEnv)
-
-      assert(storedApps.isEmpty)
-      assert(storedDrivers.isEmpty)
-
-      // Check deserializing WorkerInfo
-      assert(storedWorkers.size == 1)
-      val recoveryWorkerInfo = storedWorkers.head
-      assert(workerToPersist.id === recoveryWorkerInfo.id)
-      assert(workerToPersist.host === recoveryWorkerInfo.host)
-      assert(workerToPersist.port === recoveryWorkerInfo.port)
-      assert(workerToPersist.cores === recoveryWorkerInfo.cores)
-      assert(workerToPersist.memory === recoveryWorkerInfo.memory)
-      assert(workerToPersist.endpoint === recoveryWorkerInfo.endpoint)
-      assert(workerToPersist.webUiPort === recoveryWorkerInfo.webUiPort)
-      assert(workerToPersist.publicAddress === recoveryWorkerInfo.publicAddress)
+      persistenceEngine.persist("test_1", "test_1_value")
+      assert(Seq("test_1_value") === persistenceEngine.read[String]("test_"))
+      persistenceEngine.persist("test_2", "test_2_value")
+      assert(Set("test_1_value", "test_2_value") === persistenceEngine.read[String]("test_").toSet)
+      persistenceEngine.unpersist("test_1")
+      assert(Seq("test_2_value") === persistenceEngine.read[String]("test_"))
+      persistenceEngine.unpersist("test_2")
+      assert(persistenceEngine.read[String]("test_").isEmpty)
+
+      // Test deserializing objects that contain RpcEndpointRef
+      val testRpcEnv = RpcEnv.create("test", "localhost", 12345, conf, new SecurityManager(conf))
+      try {
+        // Create a real endpoint so that we can test RpcEndpointRef deserialization
+        val workerEndpoint = testRpcEnv.setupEndpoint("worker", new RpcEndpoint {
+          override val rpcEnv: RpcEnv = testRpcEnv
+        })
+
+        val workerToPersist = new WorkerInfo(
+          id = "test_worker",
+          host = "127.0.0.1",
+          port = 10000,
+          cores = 0,
+          memory = 0,
+          endpoint = workerEndpoint,
+          webUiPort = 0,
+          publicAddress = ""
+        )
+
+        persistenceEngine.addWorker(workerToPersist)
+
+        val (storedApps, storedDrivers, storedWorkers) =
+          persistenceEngine.readPersistedData(testRpcEnv)
+
+        assert(storedApps.isEmpty)
+        assert(storedDrivers.isEmpty)
+
+        // Check deserializing WorkerInfo
+        assert(storedWorkers.size == 1)
+        val recoveryWorkerInfo = storedWorkers.head
+        assert(workerToPersist.id === recoveryWorkerInfo.id)
+        assert(workerToPersist.host === recoveryWorkerInfo.host)
+        assert(workerToPersist.port === recoveryWorkerInfo.port)
+        assert(workerToPersist.cores === recoveryWorkerInfo.cores)
+        assert(workerToPersist.memory === recoveryWorkerInfo.memory)
+        assert(workerToPersist.endpoint === recoveryWorkerInfo.endpoint)
+        assert(workerToPersist.webUiPort === recoveryWorkerInfo.webUiPort)
+        assert(workerToPersist.publicAddress === recoveryWorkerInfo.publicAddress)
+      } finally {
+        testRpcEnv.shutdown()
+        testRpcEnv.awaitTermination()
+      }
     } finally {
-      testRpcEnv.shutdown()
-      testRpcEnv.awaitTermination()
+      persistenceEngine.close()
     }
   }
 

From 03ba56d78f50747710d01c27d409ba2be42ae557 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Baptiste=20Onofr=C3=A9?= <jbonofre@apache.org>
Date: Fri, 20 Nov 2015 14:45:40 -0800
Subject: [PATCH 829/896] [SPARK-11716][SQL] UDFRegistration just drops the
 input type when re-creating the UserDefinedFunction
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

https://issues.apache.org/jira/browse/SPARK-11716

This is one is #9739 and a regression test. When commit it, please make sure the author is jbonofre.

You can find the original PR at https://github.com/apache/spark/pull/9739

closes #9739

Author: Jean-Baptiste Onofré <jbonofre@apache.org>
Author: Yin Huai <yhuai@databricks.com>

Closes #9868 from yhuai/SPARK-11716.
---
 .../apache/spark/sql/UDFRegistration.scala    | 48 +++++++++----------
 .../scala/org/apache/spark/sql/UDFSuite.scala | 15 ++++++
 2 files changed, 39 insertions(+), 24 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
index fc4d0938c533..051694c0d43a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/UDFRegistration.scala
@@ -88,7 +88,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
           val inputTypes = Try($inputTypes).getOrElse(Nil)
           def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
           functionRegistry.registerFunction(name, builder)
-          UserDefinedFunction(func, dataType)
+          UserDefinedFunction(func, dataType, inputTypes)
         }""")
     }
 
@@ -120,7 +120,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -133,7 +133,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -146,7 +146,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -159,7 +159,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -172,7 +172,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -185,7 +185,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -198,7 +198,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -211,7 +211,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -224,7 +224,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -237,7 +237,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -250,7 +250,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -263,7 +263,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -276,7 +276,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -289,7 +289,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -302,7 +302,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -315,7 +315,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -328,7 +328,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -341,7 +341,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -354,7 +354,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -367,7 +367,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -380,7 +380,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -393,7 +393,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   /**
@@ -406,7 +406,7 @@ class UDFRegistration private[sql] (sqlContext: SQLContext) extends Logging {
     val inputTypes = Try(ScalaReflection.schemaFor[A1].dataType :: ScalaReflection.schemaFor[A2].dataType :: ScalaReflection.schemaFor[A3].dataType :: ScalaReflection.schemaFor[A4].dataType :: ScalaReflection.schemaFor[A5].dataType :: ScalaReflection.schemaFor[A6].dataType :: ScalaReflection.schemaFor[A7].dataType :: ScalaReflection.schemaFor[A8].dataType :: ScalaReflection.schemaFor[A9].dataType :: ScalaReflection.schemaFor[A10].dataType :: ScalaReflection.schemaFor[A11].dataType :: ScalaReflection.schemaFor[A12].dataType :: ScalaReflection.schemaFor[A13].dataType :: ScalaReflection.schemaFor[A14].dataType :: ScalaReflection.schemaFor[A15].dataType :: ScalaReflection.schemaFor[A16].dataType :: ScalaReflection.schemaFor[A17].dataType :: ScalaReflection.schemaFor[A18].dataType :: ScalaReflection.schemaFor[A19].dataType :: ScalaReflection.schemaFor[A20].dataType :: ScalaReflection.schemaFor[A21].dataType :: ScalaReflection.schemaFor[A22].dataType :: Nil).getOrElse(Nil)
     def builder(e: Seq[Expression]) = ScalaUDF(func, dataType, e, inputTypes)
     functionRegistry.registerFunction(name, builder)
-    UserDefinedFunction(func, dataType)
+    UserDefinedFunction(func, dataType, inputTypes)
   }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
index 9837fa6bdb35..fd736718af12 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/UDFSuite.scala
@@ -232,4 +232,19 @@ class UDFSuite extends QueryTest with SharedSQLContext {
            | (SELECT complexDataFunc(m, a, b) AS t FROM complexData) tmp
           """.stripMargin).toDF(), complexData.select("m", "a", "b"))
   }
+
+  test("SPARK-11716 UDFRegistration does not include the input data type in returned UDF") {
+    val myUDF = sqlContext.udf.register("testDataFunc", (n: Int, s: String) => { (n, s.toInt) })
+
+    // Without the fix, this will fail because we fail to cast data type of b to string
+    // because myUDF does not know its input data type. With the fix, this query should not
+    // fail.
+    checkAnswer(
+      testData2.select(myUDF($"a", $"b").as("t")),
+      testData2.selectExpr("struct(a, b)"))
+
+    checkAnswer(
+      sql("SELECT tmp.t.* FROM (SELECT testDataFunc(a, b) AS t from testData2) tmp").toDF(),
+      testData2)
+  }
 }

From a6239d587c638691f52eca3eee905c53fbf35a12 Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Fri, 20 Nov 2015 15:10:55 -0800
Subject: [PATCH 830/896] [SPARK-11756][SPARKR] Fix use of aliases - SparkR can
 not output help information for SparkR:::summary correctly

Fix use of aliases and changes uses of rdname and seealso
`aliases` is the hint for `?` - it should not be linked to some other name - those should be seealso
https://cran.r-project.org/web/packages/roxygen2/vignettes/rd.html

Clean up usage on family, as multiple use of family with the same rdname is causing duplicated See Also html blocks (like http://spark.apache.org/docs/latest/api/R/count.html)
Also changing some rdname for dplyr-like variant for better R user visibility in R doc, eg. rbind, summary, mutate, summarize

shivaram yanboliang

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9750 from felixcheung/rdocaliases.
---
 R/pkg/R/DataFrame.R | 96 ++++++++++++---------------------------------
 R/pkg/R/broadcast.R |  1 -
 R/pkg/R/generics.R  | 12 +++---
 R/pkg/R/group.R     | 12 +++---
 4 files changed, 37 insertions(+), 84 deletions(-)

diff --git a/R/pkg/R/DataFrame.R b/R/pkg/R/DataFrame.R
index 06b0108b1389..8a13e7a36766 100644
--- a/R/pkg/R/DataFrame.R
+++ b/R/pkg/R/DataFrame.R
@@ -254,7 +254,6 @@ setMethod("dtypes",
 #' @family DataFrame functions
 #' @rdname columns
 #' @name columns
-#' @aliases names
 #' @export
 #' @examples
 #'\dontrun{
@@ -272,7 +271,6 @@ setMethod("columns",
             })
           })
 
-#' @family DataFrame functions
 #' @rdname columns
 #' @name names
 setMethod("names",
@@ -281,7 +279,6 @@ setMethod("names",
             columns(x)
           })
 
-#' @family DataFrame functions
 #' @rdname columns
 #' @name names<-
 setMethod("names<-",
@@ -533,14 +530,8 @@ setMethod("distinct",
             dataFrame(sdf)
           })
 
-#' @title Distinct rows in a DataFrame
-#
-#' @description Returns a new DataFrame containing distinct rows in this DataFrame
-#'
-#' @family DataFrame functions
-#' @rdname unique
+#' @rdname distinct
 #' @name unique
-#' @aliases distinct
 setMethod("unique",
           signature(x = "DataFrame"),
           function(x) {
@@ -557,7 +548,7 @@ setMethod("unique",
 #'
 #' @family DataFrame functions
 #' @rdname sample
-#' @aliases sample_frac
+#' @name sample
 #' @export
 #' @examples
 #'\dontrun{
@@ -579,7 +570,6 @@ setMethod("sample",
             dataFrame(sdf)
           })
 
-#' @family DataFrame functions
 #' @rdname sample
 #' @name sample_frac
 setMethod("sample_frac",
@@ -589,16 +579,15 @@ setMethod("sample_frac",
             sample(x, withReplacement, fraction)
           })
 
-#' Count
+#' nrow
 #'
 #' Returns the number of rows in a DataFrame
 #'
 #' @param x A SparkSQL DataFrame
 #'
 #' @family DataFrame functions
-#' @rdname count
+#' @rdname nrow
 #' @name count
-#' @aliases nrow
 #' @export
 #' @examples
 #'\dontrun{
@@ -614,14 +603,8 @@ setMethod("count",
             callJMethod(x@sdf, "count")
           })
 
-#' @title Number of rows for a DataFrame
-#' @description Returns number of rows in a DataFrames
-#'
 #' @name nrow
-#'
-#' @family DataFrame functions
 #' @rdname nrow
-#' @aliases count
 setMethod("nrow",
           signature(x = "DataFrame"),
           function(x) {
@@ -870,7 +853,6 @@ setMethod("toRDD",
 #' @param x a DataFrame
 #' @return a GroupedData
 #' @seealso GroupedData
-#' @aliases group_by
 #' @family DataFrame functions
 #' @rdname groupBy
 #' @name groupBy
@@ -896,7 +878,6 @@ setMethod("groupBy",
              groupedData(sgd)
            })
 
-#' @family DataFrame functions
 #' @rdname groupBy
 #' @name group_by
 setMethod("group_by",
@@ -913,7 +894,6 @@ setMethod("group_by",
 #' @family DataFrame functions
 #' @rdname agg
 #' @name agg
-#' @aliases summarize
 #' @export
 setMethod("agg",
           signature(x = "DataFrame"),
@@ -921,7 +901,6 @@ setMethod("agg",
             agg(groupBy(x), ...)
           })
 
-#' @family DataFrame functions
 #' @rdname agg
 #' @name summarize
 setMethod("summarize",
@@ -1092,7 +1071,6 @@ setMethod("[", signature(x = "DataFrame", i = "Column"),
 #' @family DataFrame functions
 #' @rdname subset
 #' @name subset
-#' @aliases [
 #' @family subsetting functions
 #' @examples
 #' \dontrun{
@@ -1216,7 +1194,7 @@ setMethod("selectExpr",
 #' @family DataFrame functions
 #' @rdname withColumn
 #' @name withColumn
-#' @aliases mutate transform
+#' @seealso \link{rename} \link{mutate}
 #' @export
 #' @examples
 #'\dontrun{
@@ -1231,7 +1209,6 @@ setMethod("withColumn",
           function(x, colName, col) {
             select(x, x$"*", alias(col, colName))
           })
-
 #' Mutate
 #'
 #' Return a new DataFrame with the specified columns added.
@@ -1240,9 +1217,9 @@ setMethod("withColumn",
 #' @param col a named argument of the form name = col
 #' @return A new DataFrame with the new columns added.
 #' @family DataFrame functions
-#' @rdname withColumn
+#' @rdname mutate
 #' @name mutate
-#' @aliases withColumn transform
+#' @seealso \link{rename} \link{withColumn}
 #' @export
 #' @examples
 #'\dontrun{
@@ -1273,17 +1250,15 @@ setMethod("mutate",
           })
 
 #' @export
-#' @family DataFrame functions
-#' @rdname withColumn
+#' @rdname mutate
 #' @name transform
-#' @aliases withColumn mutate
 setMethod("transform",
           signature(`_data` = "DataFrame"),
           function(`_data`, ...) {
             mutate(`_data`, ...)
           })
 
-#' WithColumnRenamed
+#' rename
 #'
 #' Rename an existing column in a DataFrame.
 #'
@@ -1292,8 +1267,9 @@ setMethod("transform",
 #' @param newCol The new column name.
 #' @return A DataFrame with the column name changed.
 #' @family DataFrame functions
-#' @rdname withColumnRenamed
+#' @rdname rename
 #' @name withColumnRenamed
+#' @seealso \link{mutate}
 #' @export
 #' @examples
 #'\dontrun{
@@ -1316,17 +1292,9 @@ setMethod("withColumnRenamed",
             select(x, cols)
           })
 
-#' Rename
-#'
-#' Rename an existing column in a DataFrame.
-#'
-#' @param x A DataFrame
-#' @param newCol A named pair of the form new_column_name = existing_column
-#' @return A DataFrame with the column name changed.
-#' @family DataFrame functions
-#' @rdname withColumnRenamed
+#' @param newColPair A named pair of the form new_column_name = existing_column
+#' @rdname rename
 #' @name rename
-#' @aliases withColumnRenamed
 #' @export
 #' @examples
 #'\dontrun{
@@ -1371,7 +1339,6 @@ setClassUnion("characterOrColumn", c("character", "Column"))
 #' @family DataFrame functions
 #' @rdname arrange
 #' @name arrange
-#' @aliases orderby
 #' @export
 #' @examples
 #'\dontrun{
@@ -1395,8 +1362,8 @@ setMethod("arrange",
             dataFrame(sdf)
           })
 
-#' @family DataFrame functions
 #' @rdname arrange
+#' @name arrange
 #' @export
 setMethod("arrange",
           signature(x = "DataFrame", col = "character"),
@@ -1427,9 +1394,9 @@ setMethod("arrange",
             do.call("arrange", c(x, jcols))
           })
 
-#' @family DataFrame functions
 #' @rdname arrange
-#' @name orderby
+#' @name orderBy
+#' @export
 setMethod("orderBy",
           signature(x = "DataFrame", col = "characterOrColumn"),
           function(x, col) {
@@ -1492,6 +1459,7 @@ setMethod("where",
 #' @family DataFrame functions
 #' @rdname join
 #' @name join
+#' @seealso \link{merge}
 #' @export
 #' @examples
 #'\dontrun{
@@ -1528,9 +1496,7 @@ setMethod("join",
             dataFrame(sdf)
           })
 
-#'
 #' @name merge
-#' @aliases join
 #' @title Merges two data frames
 #' @param x the first data frame to be joined
 #' @param y the second data frame to be joined
@@ -1550,6 +1516,7 @@ setMethod("join",
 #'   outer join will be returned.
 #' @family DataFrame functions
 #' @rdname merge
+#' @seealso \link{join}
 #' @export
 #' @examples
 #'\dontrun{
@@ -1671,7 +1638,7 @@ generateAliasesForIntersectedCols <- function (x, intersectedColNames, suffix) {
   cols
 }
 
-#' UnionAll
+#' rbind
 #'
 #' Return a new DataFrame containing the union of rows in this DataFrame
 #' and another DataFrame. This is equivalent to `UNION ALL` in SQL.
@@ -1681,7 +1648,7 @@ generateAliasesForIntersectedCols <- function (x, intersectedColNames, suffix) {
 #' @param y A Spark DataFrame
 #' @return A DataFrame containing the result of the union.
 #' @family DataFrame functions
-#' @rdname unionAll
+#' @rdname rbind
 #' @name unionAll
 #' @export
 #' @examples
@@ -1700,13 +1667,11 @@ setMethod("unionAll",
           })
 
 #' @title Union two or more DataFrames
-#'
 #' @description Returns a new DataFrame containing rows of all parameters.
 #'
-#' @family DataFrame functions
 #' @rdname rbind
 #' @name rbind
-#' @aliases unionAll
+#' @export
 setMethod("rbind",
           signature(... = "DataFrame"),
           function(x, ..., deparse.level = 1) {
@@ -1795,7 +1760,6 @@ setMethod("except",
 #' @family DataFrame functions
 #' @rdname write.df
 #' @name write.df
-#' @aliases saveDF
 #' @export
 #' @examples
 #'\dontrun{
@@ -1828,7 +1792,6 @@ setMethod("write.df",
             callJMethod(df@sdf, "save", source, jmode, options)
           })
 
-#' @family DataFrame functions
 #' @rdname write.df
 #' @name saveDF
 #' @export
@@ -1891,7 +1854,7 @@ setMethod("saveAsTable",
             callJMethod(df@sdf, "saveAsTable", tableName, source, jmode, options)
           })
 
-#' describe
+#' summary
 #'
 #' Computes statistics for numeric columns.
 #' If no columns are given, this function computes statistics for all numerical columns.
@@ -1901,9 +1864,8 @@ setMethod("saveAsTable",
 #' @param ... Additional expressions
 #' @return A DataFrame
 #' @family DataFrame functions
-#' @rdname describe
+#' @rdname summary
 #' @name describe
-#' @aliases summary
 #' @export
 #' @examples
 #'\dontrun{
@@ -1923,8 +1885,7 @@ setMethod("describe",
             dataFrame(sdf)
           })
 
-#' @family DataFrame functions
-#' @rdname describe
+#' @rdname summary
 #' @name describe
 setMethod("describe",
           signature(x = "DataFrame"),
@@ -1934,11 +1895,6 @@ setMethod("describe",
             dataFrame(sdf)
           })
 
-#' @title Summary
-#'
-#' @description Computes statistics for numeric columns of the DataFrame
-#'
-#' @family DataFrame functions
 #' @rdname summary
 #' @name summary
 setMethod("summary",
@@ -1966,7 +1922,6 @@ setMethod("summary",
 #' @family DataFrame functions
 #' @rdname nafunctions
 #' @name dropna
-#' @aliases na.omit
 #' @export
 #' @examples
 #'\dontrun{
@@ -1993,7 +1948,6 @@ setMethod("dropna",
             dataFrame(sdf)
           })
 
-#' @family DataFrame functions
 #' @rdname nafunctions
 #' @name na.omit
 #' @export
@@ -2019,9 +1973,7 @@ setMethod("na.omit",
 #'             type are ignored. For example, if value is a character, and
 #'             subset contains a non-character column, then the non-character
 #'             column is simply ignored.
-#' @return A DataFrame
 #'
-#' @family DataFrame functions
 #' @rdname nafunctions
 #' @name fillna
 #' @export
diff --git a/R/pkg/R/broadcast.R b/R/pkg/R/broadcast.R
index 2403925b267c..38f0eed95e06 100644
--- a/R/pkg/R/broadcast.R
+++ b/R/pkg/R/broadcast.R
@@ -51,7 +51,6 @@ Broadcast <- function(id, value, jBroadcastRef, objName) {
 #
 # @param bcast The broadcast variable to get
 # @rdname broadcast
-# @aliases value,Broadcast-method
 setMethod("value",
           signature(bcast = "Broadcast"),
           function(bcast) {
diff --git a/R/pkg/R/generics.R b/R/pkg/R/generics.R
index 71004a05ba61..1b3f10ea0464 100644
--- a/R/pkg/R/generics.R
+++ b/R/pkg/R/generics.R
@@ -397,7 +397,7 @@ setGeneric("cov", function(x, col1, col2) {standardGeneric("cov") })
 #' @export
 setGeneric("corr", function(x, col1, col2, method = "pearson") {standardGeneric("corr") })
 
-#' @rdname describe
+#' @rdname summary
 #' @export
 setGeneric("describe", function(x, col, ...) { standardGeneric("describe") })
 
@@ -459,11 +459,11 @@ setGeneric("isLocal", function(x) { standardGeneric("isLocal") })
 #' @export
 setGeneric("limit", function(x, num) {standardGeneric("limit") })
 
-#' rdname merge
+#' @rdname merge
 #' @export
 setGeneric("merge")
 
-#' @rdname withColumn
+#' @rdname mutate
 #' @export
 setGeneric("mutate", function(.data, ...) {standardGeneric("mutate") })
 
@@ -475,7 +475,7 @@ setGeneric("orderBy", function(x, col) { standardGeneric("orderBy") })
 #' @export
 setGeneric("printSchema", function(x) { standardGeneric("printSchema") })
 
-#' @rdname withColumnRenamed
+#' @rdname rename
 #' @export
 setGeneric("rename", function(x, ...) { standardGeneric("rename") })
 
@@ -553,7 +553,7 @@ setGeneric("toJSON", function(x) { standardGeneric("toJSON") })
 
 setGeneric("toRDD", function(x) { standardGeneric("toRDD") })
 
-#' @rdname unionAll
+#' @rdname rbind
 #' @export
 setGeneric("unionAll", function(x, y) { standardGeneric("unionAll") })
 
@@ -565,7 +565,7 @@ setGeneric("where", function(x, condition) { standardGeneric("where") })
 #' @export
 setGeneric("withColumn", function(x, colName, col) { standardGeneric("withColumn") })
 
-#' @rdname withColumnRenamed
+#' @rdname rename
 #' @export
 setGeneric("withColumnRenamed",
            function(x, existingCol, newCol) { standardGeneric("withColumnRenamed") })
diff --git a/R/pkg/R/group.R b/R/pkg/R/group.R
index e5f702faee65..23b49aebda05 100644
--- a/R/pkg/R/group.R
+++ b/R/pkg/R/group.R
@@ -68,7 +68,7 @@ setMethod("count",
             dataFrame(callJMethod(x@sgd, "count"))
           })
 
-#' Agg
+#' summarize
 #'
 #' Aggregates on the entire DataFrame without groups.
 #' The resulting DataFrame will also contain the grouping columns.
@@ -78,12 +78,14 @@ setMethod("count",
 #'
 #' @param x a GroupedData
 #' @return a DataFrame
-#' @rdname agg
+#' @rdname summarize
+#' @name agg
 #' @family agg_funcs
 #' @examples
 #' \dontrun{
 #'  df2 <- agg(df, age = "sum")  # new column name will be created as 'SUM(age#0)'
-#'  df2 <- agg(df, ageSum = sum(df$age)) # Creates a new column named ageSum
+#'  df3 <- agg(df, ageSum = sum(df$age)) # Creates a new column named ageSum
+#'  df4 <- summarize(df, ageSum = max(df$age))
 #' }
 setMethod("agg",
           signature(x = "GroupedData"),
@@ -110,8 +112,8 @@ setMethod("agg",
             dataFrame(sdf)
           })
 
-#' @rdname agg
-#' @aliases agg
+#' @rdname summarize
+#' @name summarize
 setMethod("summarize",
           signature(x = "GroupedData"),
           function(x, ...) {

From 4b84c72dfbb9ddb415fee35f69305b5d7b280891 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Fri, 20 Nov 2015 15:17:17 -0800
Subject: [PATCH 831/896] [SPARK-11636][SQL] Support classes defined in the
 REPL with Encoders

#theScaryParts (i.e. changes to the repl, executor classloaders and codegen)...

Author: Michael Armbrust <michael@databricks.com>
Author: Yin Huai <yhuai@databricks.com>

Closes #9825 from marmbrus/dataset-replClasses2.
---
 .../org/apache/spark/repl/SparkIMain.scala    | 14 +++++++----
 .../org/apache/spark/repl/ReplSuite.scala     | 24 +++++++++++++++++++
 .../spark/repl/ExecutorClassLoader.scala      |  8 ++++++-
 .../expressions/codegen/CodeGenerator.scala   |  4 ++--
 4 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkIMain.scala b/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkIMain.scala
index 4ee605fd7f11..829b12269fd2 100644
--- a/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkIMain.scala
+++ b/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkIMain.scala
@@ -1221,10 +1221,16 @@ import org.apache.spark.annotation.DeveloperApi
         )
       }
 
-      val preamble = """
-        |class %s extends Serializable {
-        |  %s%s%s
-      """.stripMargin.format(lineRep.readName, envLines.map("  " + _ + ";\n").mkString, importsPreamble, indentCode(toCompute))
+      val preamble = s"""
+        |class ${lineRep.readName} extends Serializable {
+        |  ${envLines.map("  " + _ + ";\n").mkString}
+        |  $importsPreamble
+        |
+        |  // If we need to construct any objects defined in the REPL on an executor we will need
+        |  // to pass the outer scope to the appropriate encoder.
+        |  org.apache.spark.sql.catalyst.encoders.OuterScopes.addOuterScope(this)
+        |  ${indentCode(toCompute)}
+      """.stripMargin
       val postamble = importsTrailer + "\n}" + "\n" +
         "object " + lineRep.readName + " {\n" +
         "  val INSTANCE = new " + lineRep.readName + "();\n" +
diff --git a/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala b/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
index 5674dcd669be..081aa03002cc 100644
--- a/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
+++ b/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
@@ -262,6 +262,9 @@ class ReplSuite extends SparkFunSuite {
         |import sqlContext.implicits._
         |case class TestCaseClass(value: Int)
         |sc.parallelize(1 to 10).map(x => TestCaseClass(x)).toDF().collect()
+        |
+        |// Test Dataset Serialization in the REPL
+        |Seq(TestCaseClass(1)).toDS().collect()
       """.stripMargin)
     assertDoesNotContain("error:", output)
     assertDoesNotContain("Exception", output)
@@ -278,6 +281,27 @@ class ReplSuite extends SparkFunSuite {
     assertDoesNotContain("java.lang.ClassNotFoundException", output)
   }
 
+  test("Datasets and encoders") {
+    val output = runInterpreter("local",
+      """
+        |import org.apache.spark.sql.functions._
+        |import org.apache.spark.sql.Encoder
+        |import org.apache.spark.sql.expressions.Aggregator
+        |import org.apache.spark.sql.TypedColumn
+        |val simpleSum = new Aggregator[Int, Int, Int] with Serializable {
+        |  def zero: Int = 0                     // The initial value.
+        |  def reduce(b: Int, a: Int) = b + a    // Add an element to the running total
+        |  def merge(b1: Int, b2: Int) = b1 + b2 // Merge intermediate values.
+        |  def finish(b: Int) = b                // Return the final result.
+        |}.toColumn
+        |
+        |val ds = Seq(1, 2, 3, 4).toDS()
+        |ds.select(simpleSum).collect
+      """.stripMargin)
+    assertDoesNotContain("error:", output)
+    assertDoesNotContain("Exception", output)
+  }
+
   test("SPARK-2632 importing a method from non serializable class and not using it.") {
     val output = runInterpreter("local",
     """
diff --git a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
index 3d2d235a00c9..a976e96809cb 100644
--- a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
+++ b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
@@ -65,7 +65,13 @@ class ExecutorClassLoader(conf: SparkConf, classUri: String, parent: ClassLoader
           case e: ClassNotFoundException => {
             val classOption = findClassLocally(name)
             classOption match {
-              case None => throw new ClassNotFoundException(name, e)
+              case None =>
+                // If this class has a cause, it will break the internal assumption of Janino
+                // (the compiler used for Spark SQL code-gen).
+                // See org.codehaus.janino.ClassLoaderIClassLoader's findIClass, you will see
+                // its behavior will be changed if there is a cause and the compilation
+                // of generated class will fail.
+                throw new ClassNotFoundException(name)
               case Some(a) => a
             }
           }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
index 1b7260cdfe51..2f3d6aeb86c5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala
@@ -31,7 +31,7 @@ import org.apache.spark.sql.catalyst.util.{MapData, ArrayData}
 import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.Platform
 import org.apache.spark.unsafe.types._
-
+import org.apache.spark.util.Utils
 
 /**
  * Java source for evaluating an [[Expression]] given a [[InternalRow]] of input.
@@ -536,7 +536,7 @@ abstract class CodeGenerator[InType <: AnyRef, OutType <: AnyRef] extends Loggin
    */
   private[this] def doCompile(code: String): GeneratedClass = {
     val evaluator = new ClassBodyEvaluator()
-    evaluator.setParentClassLoader(getClass.getClassLoader)
+    evaluator.setParentClassLoader(Utils.getContextOrSparkClassLoader)
     // Cannot be under package codegen, or fail with java.lang.InstantiationException
     evaluator.setClassName("org.apache.spark.sql.catalyst.expressions.GeneratedClass")
     evaluator.setDefaultImports(Array(

From ed47b1e660b830e2d4fac8d6df93f634b260393c Mon Sep 17 00:00:00 2001
From: Vikas Nelamangala <vikasnelamangala@Vikass-MacBook-Pro.local>
Date: Fri, 20 Nov 2015 15:18:41 -0800
Subject: [PATCH 832/896] [SPARK-11549][DOCS] Replace example code in
 mllib-evaluation-metrics.md using include_example

Author: Vikas Nelamangala <vikasnelamangala@Vikass-MacBook-Pro.local>

Closes #9689 from vikasnp/master.
---
 docs/mllib-evaluation-metrics.md              | 940 +-----------------
 ...avaBinaryClassificationMetricsExample.java | 113 +++
 ...ultiLabelClassificationMetricsExample.java |  80 ++
 ...ulticlassClassificationMetricsExample.java |  97 ++
 .../mllib/JavaRankingMetricsExample.java      | 176 ++++
 .../mllib/JavaRegressionMetricsExample.java   |  91 ++
 .../binary_classification_metrics_example.py  |  55 +
 .../mllib/multi_class_metrics_example.py      |  69 ++
 .../mllib/multi_label_metrics_example.py      |  61 ++
 .../python/mllib/ranking_metrics_example.py   |  55 +
 .../mllib/regression_metrics_example.py       |  59 ++
 .../BinaryClassificationMetricsExample.scala  | 103 ++
 .../mllib/MultiLabelMetricsExample.scala      |  69 ++
 .../mllib/MulticlassMetricsExample.scala      |  99 ++
 .../mllib/RankingMetricsExample.scala         | 110 ++
 .../mllib/RegressionMetricsExample.scala      |  67 ++
 16 files changed, 1319 insertions(+), 925 deletions(-)
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaBinaryClassificationMetricsExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaMultiLabelClassificationMetricsExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaMulticlassClassificationMetricsExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaRankingMetricsExample.java
 create mode 100644 examples/src/main/java/org/apache/spark/examples/mllib/JavaRegressionMetricsExample.java
 create mode 100644 examples/src/main/python/mllib/binary_classification_metrics_example.py
 create mode 100644 examples/src/main/python/mllib/multi_class_metrics_example.py
 create mode 100644 examples/src/main/python/mllib/multi_label_metrics_example.py
 create mode 100644 examples/src/main/python/mllib/ranking_metrics_example.py
 create mode 100644 examples/src/main/python/mllib/regression_metrics_example.py
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/BinaryClassificationMetricsExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/MultiLabelMetricsExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/MulticlassMetricsExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/RankingMetricsExample.scala
 create mode 100644 examples/src/main/scala/org/apache/spark/examples/mllib/RegressionMetricsExample.scala

diff --git a/docs/mllib-evaluation-metrics.md b/docs/mllib-evaluation-metrics.md
index f73eff637dc3..6924037b941f 100644
--- a/docs/mllib-evaluation-metrics.md
+++ b/docs/mllib-evaluation-metrics.md
@@ -104,214 +104,21 @@ data, and evaluate the performance of the algorithm by several binary evaluation
 <div data-lang="scala" markdown="1">
 Refer to the [`LogisticRegressionWithLBFGS` Scala docs](api/scala/index.html#org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS) and [`BinaryClassificationMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.BinaryClassificationMetrics) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
-import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
-import org.apache.spark.mllib.regression.LabeledPoint
-import org.apache.spark.mllib.util.MLUtils
-
-// Load training data in LIBSVM format
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_binary_classification_data.txt")
-
-// Split data into training (60%) and test (40%)
-val Array(training, test) = data.randomSplit(Array(0.6, 0.4), seed = 11L)
-training.cache()
-
-// Run training algorithm to build the model
-val model = new LogisticRegressionWithLBFGS()
-  .setNumClasses(2)
-  .run(training)
-
-// Clear the prediction threshold so the model will return probabilities
-model.clearThreshold
-
-// Compute raw scores on the test set
-val predictionAndLabels = test.map { case LabeledPoint(label, features) =>
-  val prediction = model.predict(features)
-  (prediction, label)
-}
-
-// Instantiate metrics object
-val metrics = new BinaryClassificationMetrics(predictionAndLabels)
-
-// Precision by threshold
-val precision = metrics.precisionByThreshold
-precision.foreach { case (t, p) =>
-    println(s"Threshold: $t, Precision: $p")
-}
-
-// Recall by threshold
-val recall = metrics.recallByThreshold
-recall.foreach { case (t, r) =>
-    println(s"Threshold: $t, Recall: $r")
-}
-
-// Precision-Recall Curve
-val PRC = metrics.pr
-
-// F-measure
-val f1Score = metrics.fMeasureByThreshold
-f1Score.foreach { case (t, f) =>
-    println(s"Threshold: $t, F-score: $f, Beta = 1")
-}
-
-val beta = 0.5
-val fScore = metrics.fMeasureByThreshold(beta)
-f1Score.foreach { case (t, f) =>
-    println(s"Threshold: $t, F-score: $f, Beta = 0.5")
-}
-
-// AUPRC
-val auPRC = metrics.areaUnderPR
-println("Area under precision-recall curve = " + auPRC)
-
-// Compute thresholds used in ROC and PR curves
-val thresholds = precision.map(_._1)
-
-// ROC Curve
-val roc = metrics.roc
-
-// AUROC
-val auROC = metrics.areaUnderROC
-println("Area under ROC = " + auROC)
-
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/BinaryClassificationMetricsExample.scala %}
 
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`LogisticRegressionModel` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionModel.html) and [`LogisticRegressionWithLBFGS` Java docs](api/java/org/apache/spark/mllib/classification/LogisticRegressionWithLBFGS.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.mllib.classification.LogisticRegressionModel;
-import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS;
-import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.SparkConf;
-import org.apache.spark.SparkContext;
-
-public class BinaryClassification {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Binary Classification Metrics");
-    SparkContext sc = new SparkContext(conf);
-    String path = "data/mllib/sample_binary_classification_data.txt";
-    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
-
-    // Split initial RDD into two... [60% training data, 40% testing data].
-    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[] {0.6, 0.4}, 11L);
-    JavaRDD<LabeledPoint> training = splits[0].cache();
-    JavaRDD<LabeledPoint> test = splits[1];
-
-    // Run training algorithm to build the model.
-    final LogisticRegressionModel model = new LogisticRegressionWithLBFGS()
-      .setNumClasses(2)
-      .run(training.rdd());
-
-    // Clear the prediction threshold so the model will return probabilities
-    model.clearThreshold();
-
-    // Compute raw scores on the test set.
-    JavaRDD<Tuple2<Object, Object>> predictionAndLabels = test.map(
-      new Function<LabeledPoint, Tuple2<Object, Object>>() {
-        public Tuple2<Object, Object> call(LabeledPoint p) {
-          Double prediction = model.predict(p.features());
-          return new Tuple2<Object, Object>(prediction, p.label());
-        }
-      }
-    );
-
-    // Get evaluation metrics.
-    BinaryClassificationMetrics metrics = new BinaryClassificationMetrics(predictionAndLabels.rdd());
-
-    // Precision by threshold
-    JavaRDD<Tuple2<Object, Object>> precision = metrics.precisionByThreshold().toJavaRDD();
-    System.out.println("Precision by threshold: " + precision.toArray());
-
-    // Recall by threshold
-    JavaRDD<Tuple2<Object, Object>> recall = metrics.recallByThreshold().toJavaRDD();
-    System.out.println("Recall by threshold: " + recall.toArray());
-
-    // F Score by threshold
-    JavaRDD<Tuple2<Object, Object>> f1Score = metrics.fMeasureByThreshold().toJavaRDD();
-    System.out.println("F1 Score by threshold: " + f1Score.toArray());
-
-    JavaRDD<Tuple2<Object, Object>> f2Score = metrics.fMeasureByThreshold(2.0).toJavaRDD();
-    System.out.println("F2 Score by threshold: " + f2Score.toArray());
-
-    // Precision-recall curve
-    JavaRDD<Tuple2<Object, Object>> prc = metrics.pr().toJavaRDD();
-    System.out.println("Precision-recall curve: " + prc.toArray());
-
-    // Thresholds
-    JavaRDD<Double> thresholds = precision.map(
-      new Function<Tuple2<Object, Object>, Double>() {
-        public Double call (Tuple2<Object, Object> t) {
-          return new Double(t._1().toString());
-        }
-      }
-    );
-
-    // ROC Curve
-    JavaRDD<Tuple2<Object, Object>> roc = metrics.roc().toJavaRDD();
-    System.out.println("ROC curve: " + roc.toArray());
-
-    // AUPRC
-    System.out.println("Area under precision-recall curve = " + metrics.areaUnderPR());
-
-    // AUROC
-    System.out.println("Area under ROC = " + metrics.areaUnderROC());
-
-    // Save and load model
-    model.save(sc, "myModelPath");
-    LogisticRegressionModel sameModel = LogisticRegressionModel.load(sc, "myModelPath");
-  }
-}
-
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaBinaryClassificationMetricsExample.java %}
 
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`BinaryClassificationMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.BinaryClassificationMetrics) and [`LogisticRegressionWithLBFGS` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.classification.LogisticRegressionWithLBFGS) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.classification import LogisticRegressionWithLBFGS
-from pyspark.mllib.evaluation import BinaryClassificationMetrics
-from pyspark.mllib.regression import LabeledPoint
-from pyspark.mllib.util import MLUtils
-
-# Several of the methods available in scala are currently missing from pyspark
-
-# Load training data in LIBSVM format
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_binary_classification_data.txt")
-
-# Split data into training (60%) and test (40%)
-training, test = data.randomSplit([0.6, 0.4], seed = 11L)
-training.cache()
-
-# Run training algorithm to build the model
-model = LogisticRegressionWithLBFGS.train(training)
-
-# Compute raw scores on the test set
-predictionAndLabels = test.map(lambda lp: (float(model.predict(lp.features)), lp.label))
-
-# Instantiate metrics object
-metrics = BinaryClassificationMetrics(predictionAndLabels)
-
-# Area under precision-recall curve
-print("Area under PR = %s" % metrics.areaUnderPR)
-
-# Area under ROC curve
-print("Area under ROC = %s" % metrics.areaUnderROC)
-
-{% endhighlight %}
-
+{% include_example python/mllib/binary_classification_metrics_example.py %}
 </div>
 </div>
 
@@ -433,204 +240,21 @@ the data, and evaluate the performance of the algorithm by several multiclass cl
 <div data-lang="scala" markdown="1">
 Refer to the [`MulticlassMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.MulticlassMetrics) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
-import org.apache.spark.mllib.evaluation.MulticlassMetrics
-import org.apache.spark.mllib.regression.LabeledPoint
-import org.apache.spark.mllib.util.MLUtils
-
-// Load training data in LIBSVM format
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
-
-// Split data into training (60%) and test (40%)
-val Array(training, test) = data.randomSplit(Array(0.6, 0.4), seed = 11L)
-training.cache()
-
-// Run training algorithm to build the model
-val model = new LogisticRegressionWithLBFGS()
-  .setNumClasses(3)
-  .run(training)
-
-// Compute raw scores on the test set
-val predictionAndLabels = test.map { case LabeledPoint(label, features) =>
-  val prediction = model.predict(features)
-  (prediction, label)
-}
-
-// Instantiate metrics object
-val metrics = new MulticlassMetrics(predictionAndLabels)
-
-// Confusion matrix
-println("Confusion matrix:")
-println(metrics.confusionMatrix)
-
-// Overall Statistics
-val precision = metrics.precision
-val recall = metrics.recall // same as true positive rate
-val f1Score = metrics.fMeasure
-println("Summary Statistics")
-println(s"Precision = $precision")
-println(s"Recall = $recall")
-println(s"F1 Score = $f1Score")
-
-// Precision by label
-val labels = metrics.labels
-labels.foreach { l =>
-    println(s"Precision($l) = " + metrics.precision(l))
-}
-
-// Recall by label
-labels.foreach { l =>
-    println(s"Recall($l) = " + metrics.recall(l))
-}
-
-// False positive rate by label
-labels.foreach { l =>
-    println(s"FPR($l) = " + metrics.falsePositiveRate(l))
-}
-
-// F-measure by label
-labels.foreach { l =>
-    println(s"F1-Score($l) = " + metrics.fMeasure(l))
-}
-
-// Weighted stats
-println(s"Weighted precision: ${metrics.weightedPrecision}")
-println(s"Weighted recall: ${metrics.weightedRecall}")
-println(s"Weighted F1 score: ${metrics.weightedFMeasure}")
-println(s"Weighted false positive rate: ${metrics.weightedFalsePositiveRate}")
-
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/MulticlassMetricsExample.scala %}
 
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`MulticlassMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/MulticlassMetrics.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.mllib.classification.LogisticRegressionModel;
-import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS;
-import org.apache.spark.mllib.evaluation.MulticlassMetrics;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.util.MLUtils;
-import org.apache.spark.mllib.linalg.Matrix;
-import org.apache.spark.SparkConf;
-import org.apache.spark.SparkContext;
-
-public class MulticlassClassification {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Multiclass Classification Metrics");
-    SparkContext sc = new SparkContext(conf);
-    String path = "data/mllib/sample_multiclass_classification_data.txt";
-    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
-
-    // Split initial RDD into two... [60% training data, 40% testing data].
-    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[] {0.6, 0.4}, 11L);
-    JavaRDD<LabeledPoint> training = splits[0].cache();
-    JavaRDD<LabeledPoint> test = splits[1];
-
-    // Run training algorithm to build the model.
-    final LogisticRegressionModel model = new LogisticRegressionWithLBFGS()
-      .setNumClasses(3)
-      .run(training.rdd());
-
-    // Compute raw scores on the test set.
-    JavaRDD<Tuple2<Object, Object>> predictionAndLabels = test.map(
-      new Function<LabeledPoint, Tuple2<Object, Object>>() {
-        public Tuple2<Object, Object> call(LabeledPoint p) {
-          Double prediction = model.predict(p.features());
-          return new Tuple2<Object, Object>(prediction, p.label());
-        }
-      }
-    );
-
-    // Get evaluation metrics.
-    MulticlassMetrics metrics = new MulticlassMetrics(predictionAndLabels.rdd());
-
-    // Confusion matrix
-    Matrix confusion = metrics.confusionMatrix();
-    System.out.println("Confusion matrix: \n" + confusion);
-
-    // Overall statistics
-    System.out.println("Precision = " + metrics.precision());
-    System.out.println("Recall = " + metrics.recall());
-    System.out.println("F1 Score = " + metrics.fMeasure());
-
-    // Stats by labels
-    for (int i = 0; i < metrics.labels().length; i++) {
-        System.out.format("Class %f precision = %f\n", metrics.labels()[i], metrics.precision(metrics.labels()[i]));
-        System.out.format("Class %f recall = %f\n", metrics.labels()[i], metrics.recall(metrics.labels()[i]));
-        System.out.format("Class %f F1 score = %f\n", metrics.labels()[i], metrics.fMeasure(metrics.labels()[i]));
-    }
-
-    //Weighted stats
-    System.out.format("Weighted precision = %f\n", metrics.weightedPrecision());
-    System.out.format("Weighted recall = %f\n", metrics.weightedRecall());
-    System.out.format("Weighted F1 score = %f\n", metrics.weightedFMeasure());
-    System.out.format("Weighted false positive rate = %f\n", metrics.weightedFalsePositiveRate());
-
-    // Save and load model
-    model.save(sc, "myModelPath");
-    LogisticRegressionModel sameModel = LogisticRegressionModel.load(sc, "myModelPath");
-  }
-}
-
-{% endhighlight %}
+ {% include_example java/org/apache/spark/examples/mllib/JavaMulticlassClassificationMetricsExample.java %}
 
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`MulticlassMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.MulticlassMetrics) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.classification import LogisticRegressionWithLBFGS
-from pyspark.mllib.util import MLUtils
-from pyspark.mllib.evaluation import MulticlassMetrics
-
-# Load training data in LIBSVM format
-data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
-
-# Split data into training (60%) and test (40%)
-training, test = data.randomSplit([0.6, 0.4], seed = 11L)
-training.cache()
-
-# Run training algorithm to build the model
-model = LogisticRegressionWithLBFGS.train(training, numClasses=3)
-
-# Compute raw scores on the test set
-predictionAndLabels = test.map(lambda lp: (float(model.predict(lp.features)), lp.label))
-
-# Instantiate metrics object
-metrics = MulticlassMetrics(predictionAndLabels)
-
-# Overall statistics
-precision = metrics.precision()
-recall = metrics.recall()
-f1Score = metrics.fMeasure()
-print("Summary Stats")
-print("Precision = %s" % precision)
-print("Recall = %s" % recall)
-print("F1 Score = %s" % f1Score)
-
-# Statistics by class
-labels = data.map(lambda lp: lp.label).distinct().collect()
-for label in sorted(labels):
-    print("Class %s precision = %s" % (label, metrics.precision(label)))
-    print("Class %s recall = %s" % (label, metrics.recall(label)))
-    print("Class %s F1 Measure = %s" % (label, metrics.fMeasure(label, beta=1.0)))
-
-# Weighted stats
-print("Weighted recall = %s" % metrics.weightedRecall)
-print("Weighted precision = %s" % metrics.weightedPrecision)
-print("Weighted F(1) Score = %s" % metrics.weightedFMeasure())
-print("Weighted F(0.5) Score = %s" % metrics.weightedFMeasure(beta=0.5))
-print("Weighted false positive rate = %s" % metrics.weightedFalsePositiveRate)
-{% endhighlight %}
+{% include_example python/mllib/multi_class_metrics_example.py %}
 
 </div>
 </div>
@@ -766,154 +390,21 @@ True classes:
 <div data-lang="scala" markdown="1">
 Refer to the [`MultilabelMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.MultilabelMetrics) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.evaluation.MultilabelMetrics
-import org.apache.spark.rdd.RDD;
-
-val scoreAndLabels: RDD[(Array[Double], Array[Double])] = sc.parallelize(
-  Seq((Array(0.0, 1.0), Array(0.0, 2.0)),
-    (Array(0.0, 2.0), Array(0.0, 1.0)),
-    (Array(), Array(0.0)),
-    (Array(2.0), Array(2.0)),
-    (Array(2.0, 0.0), Array(2.0, 0.0)),
-    (Array(0.0, 1.0, 2.0), Array(0.0, 1.0)),
-    (Array(1.0), Array(1.0, 2.0))), 2)
-
-// Instantiate metrics object
-val metrics = new MultilabelMetrics(scoreAndLabels)
-
-// Summary stats
-println(s"Recall = ${metrics.recall}")
-println(s"Precision = ${metrics.precision}")
-println(s"F1 measure = ${metrics.f1Measure}")
-println(s"Accuracy = ${metrics.accuracy}")
-
-// Individual label stats
-metrics.labels.foreach(label => println(s"Class $label precision = ${metrics.precision(label)}"))
-metrics.labels.foreach(label => println(s"Class $label recall = ${metrics.recall(label)}"))
-metrics.labels.foreach(label => println(s"Class $label F1-score = ${metrics.f1Measure(label)}"))
-
-// Micro stats
-println(s"Micro recall = ${metrics.microRecall}")
-println(s"Micro precision = ${metrics.microPrecision}")
-println(s"Micro F1 measure = ${metrics.microF1Measure}")
-
-// Hamming loss
-println(s"Hamming loss = ${metrics.hammingLoss}")
-
-// Subset accuracy
-println(s"Subset accuracy = ${metrics.subsetAccuracy}")
-
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/MultiLabelMetricsExample.scala %}
 
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`MultilabelMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/MultilabelMetrics.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.mllib.evaluation.MultilabelMetrics;
-import org.apache.spark.SparkConf;
-import java.util.Arrays;
-import java.util.List;
-
-public class MultilabelClassification {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Multilabel Classification Metrics");
-    JavaSparkContext sc = new JavaSparkContext(conf);
-
-    List<Tuple2<double[], double[]>> data = Arrays.asList(
-        new Tuple2<double[], double[]>(new double[]{0.0, 1.0}, new double[]{0.0, 2.0}),
-        new Tuple2<double[], double[]>(new double[]{0.0, 2.0}, new double[]{0.0, 1.0}),
-        new Tuple2<double[], double[]>(new double[]{}, new double[]{0.0}),
-        new Tuple2<double[], double[]>(new double[]{2.0}, new double[]{2.0}),
-        new Tuple2<double[], double[]>(new double[]{2.0, 0.0}, new double[]{2.0, 0.0}),
-        new Tuple2<double[], double[]>(new double[]{0.0, 1.0, 2.0}, new double[]{0.0, 1.0}),
-        new Tuple2<double[], double[]>(new double[]{1.0}, new double[]{1.0, 2.0})
-        );
-    JavaRDD<Tuple2<double[], double[]>> scoreAndLabels = sc.parallelize(data);
-
-    // Instantiate metrics object
-    MultilabelMetrics metrics = new MultilabelMetrics(scoreAndLabels.rdd());
-
-    // Summary stats
-    System.out.format("Recall = %f\n", metrics.recall());
-    System.out.format("Precision = %f\n", metrics.precision());
-    System.out.format("F1 measure = %f\n", metrics.f1Measure());
-    System.out.format("Accuracy = %f\n", metrics.accuracy());
-
-    // Stats by labels
-    for (int i = 0; i < metrics.labels().length - 1; i++) {
-        System.out.format("Class %1.1f precision = %f\n", metrics.labels()[i], metrics.precision(metrics.labels()[i]));
-        System.out.format("Class %1.1f recall = %f\n", metrics.labels()[i], metrics.recall(metrics.labels()[i]));
-        System.out.format("Class %1.1f F1 score = %f\n", metrics.labels()[i], metrics.f1Measure(metrics.labels()[i]));
-    }
-
-    // Micro stats
-    System.out.format("Micro recall = %f\n", metrics.microRecall());
-    System.out.format("Micro precision = %f\n", metrics.microPrecision());
-    System.out.format("Micro F1 measure = %f\n", metrics.microF1Measure());
-
-    // Hamming loss
-    System.out.format("Hamming loss = %f\n", metrics.hammingLoss());
-
-    // Subset accuracy
-    System.out.format("Subset accuracy = %f\n", metrics.subsetAccuracy());
-
-  }
-}
-
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaMultiLabelClassificationMetricsExample.java %}
 
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`MultilabelMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.MultilabelMetrics) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.evaluation import MultilabelMetrics
-
-scoreAndLabels = sc.parallelize([
-    ([0.0, 1.0], [0.0, 2.0]),
-    ([0.0, 2.0], [0.0, 1.0]),
-    ([], [0.0]),
-    ([2.0], [2.0]),
-    ([2.0, 0.0], [2.0, 0.0]),
-    ([0.0, 1.0, 2.0], [0.0, 1.0]),
-    ([1.0], [1.0, 2.0])])
-
-# Instantiate metrics object
-metrics = MultilabelMetrics(scoreAndLabels)
-
-# Summary stats
-print("Recall = %s" % metrics.recall())
-print("Precision = %s" % metrics.precision())
-print("F1 measure = %s" % metrics.f1Measure())
-print("Accuracy = %s" % metrics.accuracy)
-
-# Individual label stats
-labels = scoreAndLabels.flatMap(lambda x: x[1]).distinct().collect()
-for label in labels:
-    print("Class %s precision = %s" % (label, metrics.precision(label)))
-    print("Class %s recall = %s" % (label, metrics.recall(label)))
-    print("Class %s F1 Measure = %s" % (label, metrics.f1Measure(label)))
-
-# Micro stats
-print("Micro precision = %s" % metrics.microPrecision)
-print("Micro recall = %s" % metrics.microRecall)
-print("Micro F1 measure = %s" % metrics.microF1Measure)
-
-# Hamming loss
-print("Hamming loss = %s" % metrics.hammingLoss)
-
-# Subset accuracy
-print("Subset accuracy = %s" % metrics.subsetAccuracy)
-
-{% endhighlight %}
+{% include_example python/mllib/multi_label_metrics_example.py %}
 
 </div>
 </div>
@@ -1027,280 +518,21 @@ expanded world of non-positive weights are "the same as never having interacted
 <div data-lang="scala" markdown="1">
 Refer to the [`RegressionMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RegressionMetrics) and [`RankingMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RankingMetrics) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.evaluation.{RegressionMetrics, RankingMetrics}
-import org.apache.spark.mllib.recommendation.{ALS, Rating}
-
-// Read in the ratings data
-val ratings = sc.textFile("data/mllib/sample_movielens_data.txt").map { line =>
-  val fields = line.split("::")
-  Rating(fields(0).toInt, fields(1).toInt, fields(2).toDouble - 2.5)
-}.cache()
-
-// Map ratings to 1 or 0, 1 indicating a movie that should be recommended
-val binarizedRatings = ratings.map(r => Rating(r.user, r.product, if (r.rating > 0) 1.0 else 0.0)).cache()
-
-// Summarize ratings
-val numRatings = ratings.count()
-val numUsers = ratings.map(_.user).distinct().count()
-val numMovies = ratings.map(_.product).distinct().count()
-println(s"Got $numRatings ratings from $numUsers users on $numMovies movies.")
-
-// Build the model
-val numIterations = 10
-val rank = 10
-val lambda = 0.01
-val model = ALS.train(ratings, rank, numIterations, lambda)
-
-// Define a function to scale ratings from 0 to 1
-def scaledRating(r: Rating): Rating = {
-  val scaledRating = math.max(math.min(r.rating, 1.0), 0.0)
-  Rating(r.user, r.product, scaledRating)
-}
-
-// Get sorted top ten predictions for each user and then scale from [0, 1]
-val userRecommended = model.recommendProductsForUsers(10).map{ case (user, recs) =>
-  (user, recs.map(scaledRating))
-}
-
-// Assume that any movie a user rated 3 or higher (which maps to a 1) is a relevant document
-// Compare with top ten most relevant documents
-val userMovies = binarizedRatings.groupBy(_.user)
-val relevantDocuments = userMovies.join(userRecommended).map{ case (user, (actual, predictions)) =>
-  (predictions.map(_.product), actual.filter(_.rating > 0.0).map(_.product).toArray)
-}
-
-// Instantiate metrics object
-val metrics = new RankingMetrics(relevantDocuments)
-
-// Precision at K
-Array(1, 3, 5).foreach{ k =>
-  println(s"Precision at $k = ${metrics.precisionAt(k)}")
-}
-
-// Mean average precision
-println(s"Mean average precision = ${metrics.meanAveragePrecision}")
-
-// Normalized discounted cumulative gain
-Array(1, 3, 5).foreach{ k =>
-  println(s"NDCG at $k = ${metrics.ndcgAt(k)}")
-}
-
-// Get predictions for each data point
-val allPredictions = model.predict(ratings.map(r => (r.user, r.product))).map(r => ((r.user, r.product), r.rating))
-val allRatings = ratings.map(r => ((r.user, r.product), r.rating))
-val predictionsAndLabels = allPredictions.join(allRatings).map{ case ((user, product), (predicted, actual)) =>
-  (predicted, actual)
-}
-
-// Get the RMSE using regression metrics
-val regressionMetrics = new RegressionMetrics(predictionsAndLabels)
-println(s"RMSE = ${regressionMetrics.rootMeanSquaredError}")
-
-// R-squared
-println(s"R-squared = ${regressionMetrics.r2}")
-
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/RankingMetricsExample.scala %}
 
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`RegressionMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RegressionMetrics.html) and [`RankingMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RankingMetrics.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.rdd.RDD;
-import org.apache.spark.mllib.recommendation.MatrixFactorizationModel;
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.function.Function;
-import java.util.*;
-import org.apache.spark.mllib.evaluation.RegressionMetrics;
-import org.apache.spark.mllib.evaluation.RankingMetrics;
-import org.apache.spark.mllib.recommendation.ALS;
-import org.apache.spark.mllib.recommendation.Rating;
-
-// Read in the ratings data
-public class Ranking {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Ranking Metrics");
-    JavaSparkContext sc = new JavaSparkContext(conf);
-    String path = "data/mllib/sample_movielens_data.txt";
-    JavaRDD<String> data = sc.textFile(path);
-    JavaRDD<Rating> ratings = data.map(
-      new Function<String, Rating>() {
-        public Rating call(String line) {
-          String[] parts = line.split("::");
-          return new Rating(Integer.parseInt(parts[0]), Integer.parseInt(parts[1]), Double.parseDouble(parts[2]) - 2.5);
-        }
-      }
-    );
-    ratings.cache();
-
-    // Train an ALS model
-    final MatrixFactorizationModel model = ALS.train(JavaRDD.toRDD(ratings), 10, 10, 0.01);
-
-    // Get top 10 recommendations for every user and scale ratings from 0 to 1
-    JavaRDD<Tuple2<Object, Rating[]>> userRecs = model.recommendProductsForUsers(10).toJavaRDD();
-    JavaRDD<Tuple2<Object, Rating[]>> userRecsScaled = userRecs.map(
-      new Function<Tuple2<Object, Rating[]>, Tuple2<Object, Rating[]>>() {
-        public Tuple2<Object, Rating[]> call(Tuple2<Object, Rating[]> t) {
-          Rating[] scaledRatings = new Rating[t._2().length];
-          for (int i = 0; i < scaledRatings.length; i++) {
-            double newRating = Math.max(Math.min(t._2()[i].rating(), 1.0), 0.0);
-            scaledRatings[i] = new Rating(t._2()[i].user(), t._2()[i].product(), newRating);
-          }
-          return new Tuple2<Object, Rating[]>(t._1(), scaledRatings);
-        }
-      }
-    );
-    JavaPairRDD<Object, Rating[]> userRecommended = JavaPairRDD.fromJavaRDD(userRecsScaled);
-
-    // Map ratings to 1 or 0, 1 indicating a movie that should be recommended
-    JavaRDD<Rating> binarizedRatings = ratings.map(
-      new Function<Rating, Rating>() {
-        public Rating call(Rating r) {
-          double binaryRating;
-          if (r.rating() > 0.0) {
-            binaryRating = 1.0;
-          }
-          else {
-            binaryRating = 0.0;
-          }
-          return new Rating(r.user(), r.product(), binaryRating);
-        }
-      }
-    );
-
-    // Group ratings by common user
-    JavaPairRDD<Object, Iterable<Rating>> userMovies = binarizedRatings.groupBy(
-      new Function<Rating, Object>() {
-        public Object call(Rating r) {
-          return r.user();
-        }
-      }
-    );
-
-    // Get true relevant documents from all user ratings
-    JavaPairRDD<Object, List<Integer>> userMoviesList = userMovies.mapValues(
-      new Function<Iterable<Rating>, List<Integer>>() {
-        public List<Integer> call(Iterable<Rating> docs) {
-          List<Integer> products = new ArrayList<Integer>();
-          for (Rating r : docs) {
-            if (r.rating() > 0.0) {
-              products.add(r.product());
-            }
-          }
-          return products;
-        }
-      }
-    );
-
-    // Extract the product id from each recommendation
-    JavaPairRDD<Object, List<Integer>> userRecommendedList = userRecommended.mapValues(
-      new Function<Rating[], List<Integer>>() {
-        public List<Integer> call(Rating[] docs) {
-          List<Integer> products = new ArrayList<Integer>();
-          for (Rating r : docs) {
-            products.add(r.product());
-          }
-          return products;
-        }
-      }
-    );
-    JavaRDD<Tuple2<List<Integer>, List<Integer>>> relevantDocs = userMoviesList.join(userRecommendedList).values();
-
-    // Instantiate the metrics object
-    RankingMetrics metrics = RankingMetrics.of(relevantDocs);
-
-    // Precision and NDCG at k
-    Integer[] kVector = {1, 3, 5};
-    for (Integer k : kVector) {
-      System.out.format("Precision at %d = %f\n", k, metrics.precisionAt(k));
-      System.out.format("NDCG at %d = %f\n", k, metrics.ndcgAt(k));
-    }
-
-    // Mean average precision
-    System.out.format("Mean average precision = %f\n", metrics.meanAveragePrecision());
-
-    // Evaluate the model using numerical ratings and regression metrics
-    JavaRDD<Tuple2<Object, Object>> userProducts = ratings.map(
-      new Function<Rating, Tuple2<Object, Object>>() {
-        public Tuple2<Object, Object> call(Rating r) {
-          return new Tuple2<Object, Object>(r.user(), r.product());
-        }
-      }
-    );
-    JavaPairRDD<Tuple2<Integer, Integer>, Object> predictions = JavaPairRDD.fromJavaRDD(
-      model.predict(JavaRDD.toRDD(userProducts)).toJavaRDD().map(
-        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Object>>() {
-          public Tuple2<Tuple2<Integer, Integer>, Object> call(Rating r){
-            return new Tuple2<Tuple2<Integer, Integer>, Object>(
-              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
-          }
-        }
-    ));
-    JavaRDD<Tuple2<Object, Object>> ratesAndPreds =
-      JavaPairRDD.fromJavaRDD(ratings.map(
-        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Object>>() {
-          public Tuple2<Tuple2<Integer, Integer>, Object> call(Rating r){
-            return new Tuple2<Tuple2<Integer, Integer>, Object>(
-              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
-          }
-        }
-    )).join(predictions).values();
-
-    // Create regression metrics object
-    RegressionMetrics regressionMetrics = new RegressionMetrics(ratesAndPreds.rdd());
-
-    // Root mean squared error
-    System.out.format("RMSE = %f\n", regressionMetrics.rootMeanSquaredError());
-
-    // R-squared
-    System.out.format("R-squared = %f\n", regressionMetrics.r2());
-  }
-}
-
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaRankingMetricsExample.java %}
 
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`RegressionMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RegressionMetrics) and [`RankingMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RankingMetrics) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.recommendation import ALS, Rating
-from pyspark.mllib.evaluation import RegressionMetrics, RankingMetrics
-
-#  Read in the ratings data
-lines = sc.textFile("data/mllib/sample_movielens_data.txt")
-
-def parseLine(line):
-    fields = line.split("::")
-    return Rating(int(fields[0]), int(fields[1]), float(fields[2]) - 2.5)
-ratings = lines.map(lambda r: parseLine(r))
-
-# Train a model on to predict user-product ratings
-model = ALS.train(ratings, 10, 10, 0.01)
-
-# Get predicted ratings on all existing user-product pairs
-testData = ratings.map(lambda p: (p.user, p.product))
-predictions = model.predictAll(testData).map(lambda r: ((r.user, r.product), r.rating))
-
-ratingsTuple = ratings.map(lambda r: ((r.user, r.product), r.rating))
-scoreAndLabels = predictions.join(ratingsTuple).map(lambda tup: tup[1])
-
-# Instantiate regression metrics to compare predicted and actual ratings
-metrics = RegressionMetrics(scoreAndLabels)
-
-# Root mean sqaured error
-print("RMSE = %s" % metrics.rootMeanSquaredError)
-
-# R-squared
-print("R-squared = %s" % metrics.r2)
-
-{% endhighlight %}
+{% include_example python/mllib/ranking_metrics_example.py %}
 
 </div>
 </div>
@@ -1350,163 +582,21 @@ and evaluate the performance of the algorithm by several regression metrics.
 <div data-lang="scala" markdown="1">
 Refer to the [`RegressionMetrics` Scala docs](api/scala/index.html#org.apache.spark.mllib.evaluation.RegressionMetrics) for details on the API.
 
-{% highlight scala %}
-import org.apache.spark.mllib.regression.LabeledPoint
-import org.apache.spark.mllib.regression.LinearRegressionModel
-import org.apache.spark.mllib.regression.LinearRegressionWithSGD
-import org.apache.spark.mllib.linalg.Vectors
-import org.apache.spark.mllib.evaluation.RegressionMetrics
-import org.apache.spark.mllib.util.MLUtils
-
-// Load the data
-val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_linear_regression_data.txt").cache()
-
-// Build the model
-val numIterations = 100
-val model = LinearRegressionWithSGD.train(data, numIterations)
-
-// Get predictions
-val valuesAndPreds = data.map{ point =>
-  val prediction = model.predict(point.features)
-  (prediction, point.label)
-}
-
-// Instantiate metrics object
-val metrics = new RegressionMetrics(valuesAndPreds)
-
-// Squared error
-println(s"MSE = ${metrics.meanSquaredError}")
-println(s"RMSE = ${metrics.rootMeanSquaredError}")
-
-// R-squared
-println(s"R-squared = ${metrics.r2}")
-
-// Mean absolute error
-println(s"MAE = ${metrics.meanAbsoluteError}")
-
-// Explained variance
-println(s"Explained variance = ${metrics.explainedVariance}")
-
-{% endhighlight %}
+{% include_example scala/org/apache/spark/examples/mllib/RegressionMetricsExample.scala %}
 
 </div>
 
 <div data-lang="java" markdown="1">
 Refer to the [`RegressionMetrics` Java docs](api/java/org/apache/spark/mllib/evaluation/RegressionMetrics.html) for details on the API.
 
-{% highlight java %}
-import scala.Tuple2;
-
-import org.apache.spark.api.java.*;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.mllib.linalg.Vectors;
-import org.apache.spark.mllib.regression.LabeledPoint;
-import org.apache.spark.mllib.regression.LinearRegressionModel;
-import org.apache.spark.mllib.regression.LinearRegressionWithSGD;
-import org.apache.spark.mllib.evaluation.RegressionMetrics;
-import org.apache.spark.SparkConf;
-
-public class LinearRegression {
-  public static void main(String[] args) {
-    SparkConf conf = new SparkConf().setAppName("Linear Regression Example");
-    JavaSparkContext sc = new JavaSparkContext(conf);
-
-    // Load and parse the data
-    String path = "data/mllib/sample_linear_regression_data.txt";
-    JavaRDD<String> data = sc.textFile(path);
-    JavaRDD<LabeledPoint> parsedData = data.map(
-      new Function<String, LabeledPoint>() {
-        public LabeledPoint call(String line) {
-          String[] parts = line.split(" ");
-          double[] v = new double[parts.length - 1];
-          for (int i = 1; i < parts.length - 1; i++)
-            v[i - 1] = Double.parseDouble(parts[i].split(":")[1]);
-          return new LabeledPoint(Double.parseDouble(parts[0]), Vectors.dense(v));
-        }
-      }
-    );
-    parsedData.cache();
-
-    // Building the model
-    int numIterations = 100;
-    final LinearRegressionModel model =
-      LinearRegressionWithSGD.train(JavaRDD.toRDD(parsedData), numIterations);
-
-    // Evaluate model on training examples and compute training error
-    JavaRDD<Tuple2<Object, Object>> valuesAndPreds = parsedData.map(
-      new Function<LabeledPoint, Tuple2<Object, Object>>() {
-        public Tuple2<Object, Object> call(LabeledPoint point) {
-          double prediction = model.predict(point.features());
-          return new Tuple2<Object, Object>(prediction, point.label());
-        }
-      }
-    );
-
-    // Instantiate metrics object
-    RegressionMetrics metrics = new RegressionMetrics(valuesAndPreds.rdd());
-
-    // Squared error
-    System.out.format("MSE = %f\n", metrics.meanSquaredError());
-    System.out.format("RMSE = %f\n", metrics.rootMeanSquaredError());
-
-    // R-squared
-    System.out.format("R Squared = %f\n", metrics.r2());
-
-    // Mean absolute error
-    System.out.format("MAE = %f\n", metrics.meanAbsoluteError());
-
-    // Explained variance
-    System.out.format("Explained Variance = %f\n", metrics.explainedVariance());
-
-    // Save and load model
-    model.save(sc.sc(), "myModelPath");
-    LinearRegressionModel sameModel = LinearRegressionModel.load(sc.sc(), "myModelPath");
-  }
-}
-
-{% endhighlight %}
+{% include_example java/org/apache/spark/examples/mllib/JavaRegressionMetricsExample.java %}
 
 </div>
 
 <div data-lang="python" markdown="1">
 Refer to the [`RegressionMetrics` Python docs](api/python/pyspark.mllib.html#pyspark.mllib.evaluation.RegressionMetrics) for more details on the API.
 
-{% highlight python %}
-from pyspark.mllib.regression import LabeledPoint, LinearRegressionWithSGD
-from pyspark.mllib.evaluation import RegressionMetrics
-from pyspark.mllib.linalg import DenseVector
-
-# Load and parse the data
-def parsePoint(line):
-    values = line.split()
-    return LabeledPoint(float(values[0]), DenseVector([float(x.split(':')[1]) for x in values[1:]]))
-
-data = sc.textFile("data/mllib/sample_linear_regression_data.txt")
-parsedData = data.map(parsePoint)
-
-# Build the model
-model = LinearRegressionWithSGD.train(parsedData)
-
-# Get predictions
-valuesAndPreds = parsedData.map(lambda p: (float(model.predict(p.features)), p.label))
-
-# Instantiate metrics object
-metrics = RegressionMetrics(valuesAndPreds)
-
-# Squared Error
-print("MSE = %s" % metrics.meanSquaredError)
-print("RMSE = %s" % metrics.rootMeanSquaredError)
-
-# R-squared
-print("R-squared = %s" % metrics.r2)
-
-# Mean absolute error
-print("MAE = %s" % metrics.meanAbsoluteError)
-
-# Explained variance
-print("Explained variance = %s" % metrics.explainedVariance)
-
-{% endhighlight %}
+{% include_example python/mllib/regression_metrics_example.py %}
 
 </div>
 </div>
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaBinaryClassificationMetricsExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaBinaryClassificationMetricsExample.java
new file mode 100644
index 000000000000..980a9108af53
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaBinaryClassificationMetricsExample.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.classification.LogisticRegressionModel;
+import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS;
+import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+// $example off$
+import org.apache.spark.SparkConf;
+import org.apache.spark.SparkContext;
+
+public class JavaBinaryClassificationMetricsExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("Java Binary Classification Metrics Example");
+    SparkContext sc = new SparkContext(conf);
+    // $example on$
+    String path = "data/mllib/sample_binary_classification_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
+
+    // Split initial RDD into two... [60% training data, 40% testing data].
+    JavaRDD<LabeledPoint>[] splits =
+      data.randomSplit(new double[]{0.6, 0.4}, 11L);
+    JavaRDD<LabeledPoint> training = splits[0].cache();
+    JavaRDD<LabeledPoint> test = splits[1];
+
+    // Run training algorithm to build the model.
+    final LogisticRegressionModel model = new LogisticRegressionWithLBFGS()
+      .setNumClasses(2)
+      .run(training.rdd());
+
+    // Clear the prediction threshold so the model will return probabilities
+    model.clearThreshold();
+
+    // Compute raw scores on the test set.
+    JavaRDD<Tuple2<Object, Object>> predictionAndLabels = test.map(
+      new Function<LabeledPoint, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(LabeledPoint p) {
+          Double prediction = model.predict(p.features());
+          return new Tuple2<Object, Object>(prediction, p.label());
+        }
+      }
+    );
+
+    // Get evaluation metrics.
+    BinaryClassificationMetrics metrics = new BinaryClassificationMetrics(predictionAndLabels.rdd());
+
+    // Precision by threshold
+    JavaRDD<Tuple2<Object, Object>> precision = metrics.precisionByThreshold().toJavaRDD();
+    System.out.println("Precision by threshold: " + precision.toArray());
+
+    // Recall by threshold
+    JavaRDD<Tuple2<Object, Object>> recall = metrics.recallByThreshold().toJavaRDD();
+    System.out.println("Recall by threshold: " + recall.toArray());
+
+    // F Score by threshold
+    JavaRDD<Tuple2<Object, Object>> f1Score = metrics.fMeasureByThreshold().toJavaRDD();
+    System.out.println("F1 Score by threshold: " + f1Score.toArray());
+
+    JavaRDD<Tuple2<Object, Object>> f2Score = metrics.fMeasureByThreshold(2.0).toJavaRDD();
+    System.out.println("F2 Score by threshold: " + f2Score.toArray());
+
+    // Precision-recall curve
+    JavaRDD<Tuple2<Object, Object>> prc = metrics.pr().toJavaRDD();
+    System.out.println("Precision-recall curve: " + prc.toArray());
+
+    // Thresholds
+    JavaRDD<Double> thresholds = precision.map(
+      new Function<Tuple2<Object, Object>, Double>() {
+        public Double call(Tuple2<Object, Object> t) {
+          return new Double(t._1().toString());
+        }
+      }
+    );
+
+    // ROC Curve
+    JavaRDD<Tuple2<Object, Object>> roc = metrics.roc().toJavaRDD();
+    System.out.println("ROC curve: " + roc.toArray());
+
+    // AUPRC
+    System.out.println("Area under precision-recall curve = " + metrics.areaUnderPR());
+
+    // AUROC
+    System.out.println("Area under ROC = " + metrics.areaUnderROC());
+
+    // Save and load model
+    model.save(sc, "target/tmp/LogisticRegressionModel");
+    LogisticRegressionModel sameModel = LogisticRegressionModel.load(sc,
+      "target/tmp/LogisticRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaMultiLabelClassificationMetricsExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaMultiLabelClassificationMetricsExample.java
new file mode 100644
index 000000000000..b54e1ea3f2bc
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaMultiLabelClassificationMetricsExample.java
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.Arrays;
+import java.util.List;
+
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.mllib.evaluation.MultilabelMetrics;
+import org.apache.spark.rdd.RDD;
+import org.apache.spark.SparkConf;
+// $example off$
+import org.apache.spark.SparkContext;
+
+public class JavaMultiLabelClassificationMetricsExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("Multilabel Classification Metrics Example");
+    JavaSparkContext sc = new JavaSparkContext(conf);
+    // $example on$
+    List<Tuple2<double[], double[]>> data = Arrays.asList(
+      new Tuple2<double[], double[]>(new double[]{0.0, 1.0}, new double[]{0.0, 2.0}),
+      new Tuple2<double[], double[]>(new double[]{0.0, 2.0}, new double[]{0.0, 1.0}),
+      new Tuple2<double[], double[]>(new double[]{}, new double[]{0.0}),
+      new Tuple2<double[], double[]>(new double[]{2.0}, new double[]{2.0}),
+      new Tuple2<double[], double[]>(new double[]{2.0, 0.0}, new double[]{2.0, 0.0}),
+      new Tuple2<double[], double[]>(new double[]{0.0, 1.0, 2.0}, new double[]{0.0, 1.0}),
+      new Tuple2<double[], double[]>(new double[]{1.0}, new double[]{1.0, 2.0})
+    );
+    JavaRDD<Tuple2<double[], double[]>> scoreAndLabels = sc.parallelize(data);
+
+    // Instantiate metrics object
+    MultilabelMetrics metrics = new MultilabelMetrics(scoreAndLabels.rdd());
+
+    // Summary stats
+    System.out.format("Recall = %f\n", metrics.recall());
+    System.out.format("Precision = %f\n", metrics.precision());
+    System.out.format("F1 measure = %f\n", metrics.f1Measure());
+    System.out.format("Accuracy = %f\n", metrics.accuracy());
+
+    // Stats by labels
+    for (int i = 0; i < metrics.labels().length - 1; i++) {
+      System.out.format("Class %1.1f precision = %f\n", metrics.labels()[i], metrics.precision
+        (metrics.labels()[i]));
+      System.out.format("Class %1.1f recall = %f\n", metrics.labels()[i], metrics.recall(metrics
+        .labels()[i]));
+      System.out.format("Class %1.1f F1 score = %f\n", metrics.labels()[i], metrics.f1Measure
+        (metrics.labels()[i]));
+    }
+
+    // Micro stats
+    System.out.format("Micro recall = %f\n", metrics.microRecall());
+    System.out.format("Micro precision = %f\n", metrics.microPrecision());
+    System.out.format("Micro F1 measure = %f\n", metrics.microF1Measure());
+
+    // Hamming loss
+    System.out.format("Hamming loss = %f\n", metrics.hammingLoss());
+
+    // Subset accuracy
+    System.out.format("Subset accuracy = %f\n", metrics.subsetAccuracy());
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaMulticlassClassificationMetricsExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaMulticlassClassificationMetricsExample.java
new file mode 100644
index 000000000000..21f628fb51b6
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaMulticlassClassificationMetricsExample.java
@@ -0,0 +1,97 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.classification.LogisticRegressionModel;
+import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS;
+import org.apache.spark.mllib.evaluation.MulticlassMetrics;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.util.MLUtils;
+import org.apache.spark.mllib.linalg.Matrix;
+// $example off$
+import org.apache.spark.SparkConf;
+import org.apache.spark.SparkContext;
+
+public class JavaMulticlassClassificationMetricsExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("Multi class Classification Metrics Example");
+    SparkContext sc = new SparkContext(conf);
+    // $example on$
+    String path = "data/mllib/sample_multiclass_classification_data.txt";
+    JavaRDD<LabeledPoint> data = MLUtils.loadLibSVMFile(sc, path).toJavaRDD();
+
+    // Split initial RDD into two... [60% training data, 40% testing data].
+    JavaRDD<LabeledPoint>[] splits = data.randomSplit(new double[]{0.6, 0.4}, 11L);
+    JavaRDD<LabeledPoint> training = splits[0].cache();
+    JavaRDD<LabeledPoint> test = splits[1];
+
+    // Run training algorithm to build the model.
+    final LogisticRegressionModel model = new LogisticRegressionWithLBFGS()
+      .setNumClasses(3)
+      .run(training.rdd());
+
+    // Compute raw scores on the test set.
+    JavaRDD<Tuple2<Object, Object>> predictionAndLabels = test.map(
+      new Function<LabeledPoint, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(LabeledPoint p) {
+          Double prediction = model.predict(p.features());
+          return new Tuple2<Object, Object>(prediction, p.label());
+        }
+      }
+    );
+
+    // Get evaluation metrics.
+    MulticlassMetrics metrics = new MulticlassMetrics(predictionAndLabels.rdd());
+
+    // Confusion matrix
+    Matrix confusion = metrics.confusionMatrix();
+    System.out.println("Confusion matrix: \n" + confusion);
+
+    // Overall statistics
+    System.out.println("Precision = " + metrics.precision());
+    System.out.println("Recall = " + metrics.recall());
+    System.out.println("F1 Score = " + metrics.fMeasure());
+
+    // Stats by labels
+    for (int i = 0; i < metrics.labels().length; i++) {
+      System.out.format("Class %f precision = %f\n", metrics.labels()[i],metrics.precision
+        (metrics.labels()[i]));
+      System.out.format("Class %f recall = %f\n", metrics.labels()[i], metrics.recall(metrics
+        .labels()[i]));
+      System.out.format("Class %f F1 score = %f\n", metrics.labels()[i], metrics.fMeasure
+        (metrics.labels()[i]));
+    }
+
+    //Weighted stats
+    System.out.format("Weighted precision = %f\n", metrics.weightedPrecision());
+    System.out.format("Weighted recall = %f\n", metrics.weightedRecall());
+    System.out.format("Weighted F1 score = %f\n", metrics.weightedFMeasure());
+    System.out.format("Weighted false positive rate = %f\n", metrics.weightedFalsePositiveRate());
+
+    // Save and load model
+    model.save(sc, "target/tmp/LogisticRegressionModel");
+    LogisticRegressionModel sameModel = LogisticRegressionModel.load(sc,
+      "target/tmp/LogisticRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaRankingMetricsExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRankingMetricsExample.java
new file mode 100644
index 000000000000..7c4c97e74681
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRankingMetricsExample.java
@@ -0,0 +1,176 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import java.util.*;
+
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.evaluation.RegressionMetrics;
+import org.apache.spark.mllib.evaluation.RankingMetrics;
+import org.apache.spark.mllib.recommendation.ALS;
+import org.apache.spark.mllib.recommendation.MatrixFactorizationModel;
+import org.apache.spark.mllib.recommendation.Rating;
+// $example off$
+import org.apache.spark.SparkConf;
+
+public class JavaRankingMetricsExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("Java Ranking Metrics Example");
+    JavaSparkContext sc = new JavaSparkContext(conf);
+    // $example on$
+    String path = "data/mllib/sample_movielens_data.txt";
+    JavaRDD<String> data = sc.textFile(path);
+    JavaRDD<Rating> ratings = data.map(
+      new Function<String, Rating>() {
+        public Rating call(String line) {
+          String[] parts = line.split("::");
+            return new Rating(Integer.parseInt(parts[0]), Integer.parseInt(parts[1]), Double
+              .parseDouble(parts[2]) - 2.5);
+        }
+      }
+    );
+    ratings.cache();
+
+    // Train an ALS model
+    final MatrixFactorizationModel model = ALS.train(JavaRDD.toRDD(ratings), 10, 10, 0.01);
+
+    // Get top 10 recommendations for every user and scale ratings from 0 to 1
+    JavaRDD<Tuple2<Object, Rating[]>> userRecs = model.recommendProductsForUsers(10).toJavaRDD();
+    JavaRDD<Tuple2<Object, Rating[]>> userRecsScaled = userRecs.map(
+      new Function<Tuple2<Object, Rating[]>, Tuple2<Object, Rating[]>>() {
+        public Tuple2<Object, Rating[]> call(Tuple2<Object, Rating[]> t) {
+          Rating[] scaledRatings = new Rating[t._2().length];
+          for (int i = 0; i < scaledRatings.length; i++) {
+            double newRating = Math.max(Math.min(t._2()[i].rating(), 1.0), 0.0);
+            scaledRatings[i] = new Rating(t._2()[i].user(), t._2()[i].product(), newRating);
+          }
+          return new Tuple2<Object, Rating[]>(t._1(), scaledRatings);
+        }
+      }
+    );
+    JavaPairRDD<Object, Rating[]> userRecommended = JavaPairRDD.fromJavaRDD(userRecsScaled);
+
+    // Map ratings to 1 or 0, 1 indicating a movie that should be recommended
+    JavaRDD<Rating> binarizedRatings = ratings.map(
+      new Function<Rating, Rating>() {
+        public Rating call(Rating r) {
+          double binaryRating;
+          if (r.rating() > 0.0) {
+            binaryRating = 1.0;
+          } else {
+            binaryRating = 0.0;
+          }
+          return new Rating(r.user(), r.product(), binaryRating);
+        }
+      }
+    );
+
+    // Group ratings by common user
+    JavaPairRDD<Object, Iterable<Rating>> userMovies = binarizedRatings.groupBy(
+      new Function<Rating, Object>() {
+        public Object call(Rating r) {
+          return r.user();
+        }
+      }
+    );
+
+    // Get true relevant documents from all user ratings
+    JavaPairRDD<Object, List<Integer>> userMoviesList = userMovies.mapValues(
+      new Function<Iterable<Rating>, List<Integer>>() {
+        public List<Integer> call(Iterable<Rating> docs) {
+          List<Integer> products = new ArrayList<Integer>();
+          for (Rating r : docs) {
+            if (r.rating() > 0.0) {
+              products.add(r.product());
+            }
+          }
+          return products;
+        }
+      }
+    );
+
+    // Extract the product id from each recommendation
+    JavaPairRDD<Object, List<Integer>> userRecommendedList = userRecommended.mapValues(
+      new Function<Rating[], List<Integer>>() {
+        public List<Integer> call(Rating[] docs) {
+          List<Integer> products = new ArrayList<Integer>();
+          for (Rating r : docs) {
+            products.add(r.product());
+          }
+          return products;
+        }
+      }
+    );
+    JavaRDD<Tuple2<List<Integer>, List<Integer>>> relevantDocs = userMoviesList.join
+      (userRecommendedList).values();
+
+    // Instantiate the metrics object
+    RankingMetrics metrics = RankingMetrics.of(relevantDocs);
+
+    // Precision and NDCG at k
+    Integer[] kVector = {1, 3, 5};
+    for (Integer k : kVector) {
+      System.out.format("Precision at %d = %f\n", k, metrics.precisionAt(k));
+      System.out.format("NDCG at %d = %f\n", k, metrics.ndcgAt(k));
+    }
+
+    // Mean average precision
+    System.out.format("Mean average precision = %f\n", metrics.meanAveragePrecision());
+
+    // Evaluate the model using numerical ratings and regression metrics
+    JavaRDD<Tuple2<Object, Object>> userProducts = ratings.map(
+      new Function<Rating, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(Rating r) {
+          return new Tuple2<Object, Object>(r.user(), r.product());
+        }
+      }
+    );
+    JavaPairRDD<Tuple2<Integer, Integer>, Object> predictions = JavaPairRDD.fromJavaRDD(
+      model.predict(JavaRDD.toRDD(userProducts)).toJavaRDD().map(
+        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Object>>() {
+          public Tuple2<Tuple2<Integer, Integer>, Object> call(Rating r) {
+            return new Tuple2<Tuple2<Integer, Integer>, Object>(
+              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
+          }
+        }
+      ));
+    JavaRDD<Tuple2<Object, Object>> ratesAndPreds =
+      JavaPairRDD.fromJavaRDD(ratings.map(
+        new Function<Rating, Tuple2<Tuple2<Integer, Integer>, Object>>() {
+          public Tuple2<Tuple2<Integer, Integer>, Object> call(Rating r) {
+            return new Tuple2<Tuple2<Integer, Integer>, Object>(
+              new Tuple2<Integer, Integer>(r.user(), r.product()), r.rating());
+          }
+        }
+      )).join(predictions).values();
+
+    // Create regression metrics object
+    RegressionMetrics regressionMetrics = new RegressionMetrics(ratesAndPreds.rdd());
+
+    // Root mean squared error
+    System.out.format("RMSE = %f\n", regressionMetrics.rootMeanSquaredError());
+
+    // R-squared
+    System.out.format("R-squared = %f\n", regressionMetrics.r2());
+    // $example off$
+  }
+}
diff --git a/examples/src/main/java/org/apache/spark/examples/mllib/JavaRegressionMetricsExample.java b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRegressionMetricsExample.java
new file mode 100644
index 000000000000..d2efc6bf9777
--- /dev/null
+++ b/examples/src/main/java/org/apache/spark/examples/mllib/JavaRegressionMetricsExample.java
@@ -0,0 +1,91 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.examples.mllib;
+
+// $example on$
+import scala.Tuple2;
+
+import org.apache.spark.api.java.*;
+import org.apache.spark.api.java.function.Function;
+import org.apache.spark.mllib.linalg.Vectors;
+import org.apache.spark.mllib.regression.LabeledPoint;
+import org.apache.spark.mllib.regression.LinearRegressionModel;
+import org.apache.spark.mllib.regression.LinearRegressionWithSGD;
+import org.apache.spark.mllib.evaluation.RegressionMetrics;
+import org.apache.spark.SparkConf;
+// $example off$
+
+public class JavaRegressionMetricsExample {
+  public static void main(String[] args) {
+    SparkConf conf = new SparkConf().setAppName("Java Regression Metrics Example");
+    JavaSparkContext sc = new JavaSparkContext(conf);
+    // $example on$
+    // Load and parse the data
+    String path = "data/mllib/sample_linear_regression_data.txt";
+    JavaRDD<String> data = sc.textFile(path);
+    JavaRDD<LabeledPoint> parsedData = data.map(
+      new Function<String, LabeledPoint>() {
+        public LabeledPoint call(String line) {
+          String[] parts = line.split(" ");
+          double[] v = new double[parts.length - 1];
+          for (int i = 1; i < parts.length - 1; i++)
+            v[i - 1] = Double.parseDouble(parts[i].split(":")[1]);
+          return new LabeledPoint(Double.parseDouble(parts[0]), Vectors.dense(v));
+        }
+      }
+    );
+    parsedData.cache();
+
+    // Building the model
+    int numIterations = 100;
+    final LinearRegressionModel model = LinearRegressionWithSGD.train(JavaRDD.toRDD(parsedData),
+      numIterations);
+
+    // Evaluate model on training examples and compute training error
+    JavaRDD<Tuple2<Object, Object>> valuesAndPreds = parsedData.map(
+      new Function<LabeledPoint, Tuple2<Object, Object>>() {
+        public Tuple2<Object, Object> call(LabeledPoint point) {
+          double prediction = model.predict(point.features());
+          return new Tuple2<Object, Object>(prediction, point.label());
+        }
+      }
+    );
+
+    // Instantiate metrics object
+    RegressionMetrics metrics = new RegressionMetrics(valuesAndPreds.rdd());
+
+    // Squared error
+    System.out.format("MSE = %f\n", metrics.meanSquaredError());
+    System.out.format("RMSE = %f\n", metrics.rootMeanSquaredError());
+
+    // R-squared
+    System.out.format("R Squared = %f\n", metrics.r2());
+
+    // Mean absolute error
+    System.out.format("MAE = %f\n", metrics.meanAbsoluteError());
+
+    // Explained variance
+    System.out.format("Explained Variance = %f\n", metrics.explainedVariance());
+
+    // Save and load model
+    model.save(sc.sc(), "target/tmp/LogisticRegressionModel");
+    LinearRegressionModel sameModel = LinearRegressionModel.load(sc.sc(),
+      "target/tmp/LogisticRegressionModel");
+    // $example off$
+  }
+}
diff --git a/examples/src/main/python/mllib/binary_classification_metrics_example.py b/examples/src/main/python/mllib/binary_classification_metrics_example.py
new file mode 100644
index 000000000000..437acb998acc
--- /dev/null
+++ b/examples/src/main/python/mllib/binary_classification_metrics_example.py
@@ -0,0 +1,55 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""
+Binary Classification Metrics Example.
+"""
+from __future__ import print_function
+import sys
+from pyspark import SparkContext, SQLContext
+# $example on$
+from pyspark.mllib.classification import LogisticRegressionWithLBFGS
+from pyspark.mllib.evaluation import BinaryClassificationMetrics
+from pyspark.mllib.util import MLUtils
+# $example off$
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="BinaryClassificationMetricsExample")
+    sqlContext = SQLContext(sc)
+    # $example on$
+    # Several of the methods available in scala are currently missing from pyspark
+    # Load training data in LIBSVM format
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_binary_classification_data.txt")
+
+    # Split data into training (60%) and test (40%)
+    training, test = data.randomSplit([0.6, 0.4], seed=11L)
+    training.cache()
+
+    # Run training algorithm to build the model
+    model = LogisticRegressionWithLBFGS.train(training)
+
+    # Compute raw scores on the test set
+    predictionAndLabels = test.map(lambda lp: (float(model.predict(lp.features)), lp.label))
+
+    # Instantiate metrics object
+    metrics = BinaryClassificationMetrics(predictionAndLabels)
+
+    # Area under precision-recall curve
+    print("Area under PR = %s" % metrics.areaUnderPR)
+
+    # Area under ROC curve
+    print("Area under ROC = %s" % metrics.areaUnderROC)
+    # $example off$
diff --git a/examples/src/main/python/mllib/multi_class_metrics_example.py b/examples/src/main/python/mllib/multi_class_metrics_example.py
new file mode 100644
index 000000000000..cd56b3c97c77
--- /dev/null
+++ b/examples/src/main/python/mllib/multi_class_metrics_example.py
@@ -0,0 +1,69 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# $example on$
+from pyspark.mllib.classification import LogisticRegressionWithLBFGS
+from pyspark.mllib.util import MLUtils
+from pyspark.mllib.evaluation import MulticlassMetrics
+# $example off$
+
+from pyspark import SparkContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="MultiClassMetricsExample")
+
+    # Several of the methods available in scala are currently missing from pyspark
+    # $example on$
+    # Load training data in LIBSVM format
+    data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
+
+    # Split data into training (60%) and test (40%)
+    training, test = data.randomSplit([0.6, 0.4], seed=11L)
+    training.cache()
+
+    # Run training algorithm to build the model
+    model = LogisticRegressionWithLBFGS.train(training, numClasses=3)
+
+    # Compute raw scores on the test set
+    predictionAndLabels = test.map(lambda lp: (float(model.predict(lp.features)), lp.label))
+
+    # Instantiate metrics object
+    metrics = MulticlassMetrics(predictionAndLabels)
+
+    # Overall statistics
+    precision = metrics.precision()
+    recall = metrics.recall()
+    f1Score = metrics.fMeasure()
+    print("Summary Stats")
+    print("Precision = %s" % precision)
+    print("Recall = %s" % recall)
+    print("F1 Score = %s" % f1Score)
+
+    # Statistics by class
+    labels = data.map(lambda lp: lp.label).distinct().collect()
+    for label in sorted(labels):
+        print("Class %s precision = %s" % (label, metrics.precision(label)))
+        print("Class %s recall = %s" % (label, metrics.recall(label)))
+        print("Class %s F1 Measure = %s" % (label, metrics.fMeasure(label, beta=1.0)))
+
+    # Weighted stats
+    print("Weighted recall = %s" % metrics.weightedRecall)
+    print("Weighted precision = %s" % metrics.weightedPrecision)
+    print("Weighted F(1) Score = %s" % metrics.weightedFMeasure())
+    print("Weighted F(0.5) Score = %s" % metrics.weightedFMeasure(beta=0.5))
+    print("Weighted false positive rate = %s" % metrics.weightedFalsePositiveRate)
+    # $example off$
diff --git a/examples/src/main/python/mllib/multi_label_metrics_example.py b/examples/src/main/python/mllib/multi_label_metrics_example.py
new file mode 100644
index 000000000000..960ade659737
--- /dev/null
+++ b/examples/src/main/python/mllib/multi_label_metrics_example.py
@@ -0,0 +1,61 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# $example on$
+from pyspark.mllib.evaluation import MultilabelMetrics
+# $example off$
+from pyspark import SparkContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="MultiLabelMetricsExample")
+    # $example on$
+    scoreAndLabels = sc.parallelize([
+        ([0.0, 1.0], [0.0, 2.0]),
+        ([0.0, 2.0], [0.0, 1.0]),
+        ([], [0.0]),
+        ([2.0], [2.0]),
+        ([2.0, 0.0], [2.0, 0.0]),
+        ([0.0, 1.0, 2.0], [0.0, 1.0]),
+        ([1.0], [1.0, 2.0])])
+
+    # Instantiate metrics object
+    metrics = MultilabelMetrics(scoreAndLabels)
+
+    # Summary stats
+    print("Recall = %s" % metrics.recall())
+    print("Precision = %s" % metrics.precision())
+    print("F1 measure = %s" % metrics.f1Measure())
+    print("Accuracy = %s" % metrics.accuracy)
+
+    # Individual label stats
+    labels = scoreAndLabels.flatMap(lambda x: x[1]).distinct().collect()
+    for label in labels:
+        print("Class %s precision = %s" % (label, metrics.precision(label)))
+        print("Class %s recall = %s" % (label, metrics.recall(label)))
+        print("Class %s F1 Measure = %s" % (label, metrics.f1Measure(label)))
+
+    # Micro stats
+    print("Micro precision = %s" % metrics.microPrecision)
+    print("Micro recall = %s" % metrics.microRecall)
+    print("Micro F1 measure = %s" % metrics.microF1Measure)
+
+    # Hamming loss
+    print("Hamming loss = %s" % metrics.hammingLoss)
+
+    # Subset accuracy
+    print("Subset accuracy = %s" % metrics.subsetAccuracy)
+    # $example off$
diff --git a/examples/src/main/python/mllib/ranking_metrics_example.py b/examples/src/main/python/mllib/ranking_metrics_example.py
new file mode 100644
index 000000000000..327791966c90
--- /dev/null
+++ b/examples/src/main/python/mllib/ranking_metrics_example.py
@@ -0,0 +1,55 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# $example on$
+from pyspark.mllib.recommendation import ALS, Rating
+from pyspark.mllib.evaluation import RegressionMetrics, RankingMetrics
+# $example off$
+from pyspark import SparkContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="Ranking Metrics Example")
+
+    # Several of the methods available in scala are currently missing from pyspark
+    # $example on$
+    # Read in the ratings data
+    lines = sc.textFile("data/mllib/sample_movielens_data.txt")
+
+    def parseLine(line):
+        fields = line.split("::")
+        return Rating(int(fields[0]), int(fields[1]), float(fields[2]) - 2.5)
+    ratings = lines.map(lambda r: parseLine(r))
+
+    # Train a model on to predict user-product ratings
+    model = ALS.train(ratings, 10, 10, 0.01)
+
+    # Get predicted ratings on all existing user-product pairs
+    testData = ratings.map(lambda p: (p.user, p.product))
+    predictions = model.predictAll(testData).map(lambda r: ((r.user, r.product), r.rating))
+
+    ratingsTuple = ratings.map(lambda r: ((r.user, r.product), r.rating))
+    scoreAndLabels = predictions.join(ratingsTuple).map(lambda tup: tup[1])
+
+    # Instantiate regression metrics to compare predicted and actual ratings
+    metrics = RegressionMetrics(scoreAndLabels)
+
+    # Root mean sqaured error
+    print("RMSE = %s" % metrics.rootMeanSquaredError)
+
+    # R-squared
+    print("R-squared = %s" % metrics.r2)
+    # $example off$
diff --git a/examples/src/main/python/mllib/regression_metrics_example.py b/examples/src/main/python/mllib/regression_metrics_example.py
new file mode 100644
index 000000000000..a3a83aafd7a1
--- /dev/null
+++ b/examples/src/main/python/mllib/regression_metrics_example.py
@@ -0,0 +1,59 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# $example on$
+from pyspark.mllib.regression import LabeledPoint, LinearRegressionWithSGD
+from pyspark.mllib.evaluation import RegressionMetrics
+from pyspark.mllib.linalg import DenseVector
+# $example off$
+
+from pyspark import SparkContext
+
+if __name__ == "__main__":
+    sc = SparkContext(appName="Regression Metrics Example")
+
+    # $example on$
+    # Load and parse the data
+    def parsePoint(line):
+        values = line.split()
+        return LabeledPoint(float(values[0]),
+                            DenseVector([float(x.split(':')[1]) for x in values[1:]]))
+
+    data = sc.textFile("data/mllib/sample_linear_regression_data.txt")
+    parsedData = data.map(parsePoint)
+
+    # Build the model
+    model = LinearRegressionWithSGD.train(parsedData)
+
+    # Get predictions
+    valuesAndPreds = parsedData.map(lambda p: (float(model.predict(p.features)), p.label))
+
+    # Instantiate metrics object
+    metrics = RegressionMetrics(valuesAndPreds)
+
+    # Squared Error
+    print("MSE = %s" % metrics.meanSquaredError)
+    print("RMSE = %s" % metrics.rootMeanSquaredError)
+
+    # R-squared
+    print("R-squared = %s" % metrics.r2)
+
+    # Mean absolute error
+    print("MAE = %s" % metrics.meanAbsoluteError)
+
+    # Explained variance
+    print("Explained variance = %s" % metrics.explainedVariance)
+    # $example off$
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/BinaryClassificationMetricsExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/BinaryClassificationMetricsExample.scala
new file mode 100644
index 000000000000..13a37827ab93
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/BinaryClassificationMetricsExample.scala
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
+import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+import org.apache.spark.{SparkContext, SparkConf}
+
+object BinaryClassificationMetricsExample {
+
+  def main(args: Array[String]): Unit = {
+
+    val conf = new SparkConf().setAppName("BinaryClassificationMetricsExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    // Load training data in LIBSVM format
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_binary_classification_data.txt")
+
+    // Split data into training (60%) and test (40%)
+    val Array(training, test) = data.randomSplit(Array(0.6, 0.4), seed = 11L)
+    training.cache()
+
+    // Run training algorithm to build the model
+    val model = new LogisticRegressionWithLBFGS()
+      .setNumClasses(2)
+      .run(training)
+
+    // Clear the prediction threshold so the model will return probabilities
+    model.clearThreshold
+
+    // Compute raw scores on the test set
+    val predictionAndLabels = test.map { case LabeledPoint(label, features) =>
+      val prediction = model.predict(features)
+      (prediction, label)
+    }
+
+    // Instantiate metrics object
+    val metrics = new BinaryClassificationMetrics(predictionAndLabels)
+
+    // Precision by threshold
+    val precision = metrics.precisionByThreshold
+    precision.foreach { case (t, p) =>
+      println(s"Threshold: $t, Precision: $p")
+    }
+
+    // Recall by threshold
+    val recall = metrics.recallByThreshold
+    recall.foreach { case (t, r) =>
+      println(s"Threshold: $t, Recall: $r")
+    }
+
+    // Precision-Recall Curve
+    val PRC = metrics.pr
+
+    // F-measure
+    val f1Score = metrics.fMeasureByThreshold
+    f1Score.foreach { case (t, f) =>
+      println(s"Threshold: $t, F-score: $f, Beta = 1")
+    }
+
+    val beta = 0.5
+    val fScore = metrics.fMeasureByThreshold(beta)
+    f1Score.foreach { case (t, f) =>
+      println(s"Threshold: $t, F-score: $f, Beta = 0.5")
+    }
+
+    // AUPRC
+    val auPRC = metrics.areaUnderPR
+    println("Area under precision-recall curve = " + auPRC)
+
+    // Compute thresholds used in ROC and PR curves
+    val thresholds = precision.map(_._1)
+
+    // ROC Curve
+    val roc = metrics.roc
+
+    // AUROC
+    val auROC = metrics.areaUnderROC
+    println("Area under ROC = " + auROC)
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/MultiLabelMetricsExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/MultiLabelMetricsExample.scala
new file mode 100644
index 000000000000..4503c15360ad
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/MultiLabelMetricsExample.scala
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.evaluation.MultilabelMetrics
+import org.apache.spark.rdd.RDD
+// $example off$
+import org.apache.spark.{SparkContext, SparkConf}
+
+object MultiLabelMetricsExample {
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("MultiLabelMetricsExample")
+    val sc = new SparkContext(conf)
+    // $example on$
+    val scoreAndLabels: RDD[(Array[Double], Array[Double])] = sc.parallelize(
+      Seq((Array(0.0, 1.0), Array(0.0, 2.0)),
+        (Array(0.0, 2.0), Array(0.0, 1.0)),
+        (Array.empty[Double], Array(0.0)),
+        (Array(2.0), Array(2.0)),
+        (Array(2.0, 0.0), Array(2.0, 0.0)),
+        (Array(0.0, 1.0, 2.0), Array(0.0, 1.0)),
+        (Array(1.0), Array(1.0, 2.0))), 2)
+
+    // Instantiate metrics object
+    val metrics = new MultilabelMetrics(scoreAndLabels)
+
+    // Summary stats
+    println(s"Recall = ${metrics.recall}")
+    println(s"Precision = ${metrics.precision}")
+    println(s"F1 measure = ${metrics.f1Measure}")
+    println(s"Accuracy = ${metrics.accuracy}")
+
+    // Individual label stats
+    metrics.labels.foreach(label =>
+      println(s"Class $label precision = ${metrics.precision(label)}"))
+    metrics.labels.foreach(label => println(s"Class $label recall = ${metrics.recall(label)}"))
+    metrics.labels.foreach(label => println(s"Class $label F1-score = ${metrics.f1Measure(label)}"))
+
+    // Micro stats
+    println(s"Micro recall = ${metrics.microRecall}")
+    println(s"Micro precision = ${metrics.microPrecision}")
+    println(s"Micro F1 measure = ${metrics.microF1Measure}")
+
+    // Hamming loss
+    println(s"Hamming loss = ${metrics.hammingLoss}")
+
+    // Subset accuracy
+    println(s"Subset accuracy = ${metrics.subsetAccuracy}")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/MulticlassMetricsExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/MulticlassMetricsExample.scala
new file mode 100644
index 000000000000..090444924598
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/MulticlassMetricsExample.scala
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.classification.LogisticRegressionWithLBFGS
+import org.apache.spark.mllib.evaluation.MulticlassMetrics
+import org.apache.spark.mllib.regression.LabeledPoint
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+import org.apache.spark.{SparkContext, SparkConf}
+
+object MulticlassMetricsExample {
+
+  def main(args: Array[String]): Unit = {
+    val conf = new SparkConf().setAppName("MulticlassMetricsExample")
+    val sc = new SparkContext(conf)
+
+    // $example on$
+    // Load training data in LIBSVM format
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_multiclass_classification_data.txt")
+
+    // Split data into training (60%) and test (40%)
+    val Array(training, test) = data.randomSplit(Array(0.6, 0.4), seed = 11L)
+    training.cache()
+
+    // Run training algorithm to build the model
+    val model = new LogisticRegressionWithLBFGS()
+      .setNumClasses(3)
+      .run(training)
+
+    // Compute raw scores on the test set
+    val predictionAndLabels = test.map { case LabeledPoint(label, features) =>
+      val prediction = model.predict(features)
+      (prediction, label)
+    }
+
+    // Instantiate metrics object
+    val metrics = new MulticlassMetrics(predictionAndLabels)
+
+    // Confusion matrix
+    println("Confusion matrix:")
+    println(metrics.confusionMatrix)
+
+    // Overall Statistics
+    val precision = metrics.precision
+    val recall = metrics.recall // same as true positive rate
+    val f1Score = metrics.fMeasure
+    println("Summary Statistics")
+    println(s"Precision = $precision")
+    println(s"Recall = $recall")
+    println(s"F1 Score = $f1Score")
+
+    // Precision by label
+    val labels = metrics.labels
+    labels.foreach { l =>
+      println(s"Precision($l) = " + metrics.precision(l))
+    }
+
+    // Recall by label
+    labels.foreach { l =>
+      println(s"Recall($l) = " + metrics.recall(l))
+    }
+
+    // False positive rate by label
+    labels.foreach { l =>
+      println(s"FPR($l) = " + metrics.falsePositiveRate(l))
+    }
+
+    // F-measure by label
+    labels.foreach { l =>
+      println(s"F1-Score($l) = " + metrics.fMeasure(l))
+    }
+
+    // Weighted stats
+    println(s"Weighted precision: ${metrics.weightedPrecision}")
+    println(s"Weighted recall: ${metrics.weightedRecall}")
+    println(s"Weighted F1 score: ${metrics.weightedFMeasure}")
+    println(s"Weighted false positive rate: ${metrics.weightedFalsePositiveRate}")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/RankingMetricsExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/RankingMetricsExample.scala
new file mode 100644
index 000000000000..cffa03d5cc9f
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/RankingMetricsExample.scala
@@ -0,0 +1,110 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// scalastyle:off println
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.evaluation.{RegressionMetrics, RankingMetrics}
+import org.apache.spark.mllib.recommendation.{ALS, Rating}
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkContext, SparkConf}
+
+object RankingMetricsExample {
+  def main(args: Array[String]) {
+    val conf = new SparkConf().setAppName("RankingMetricsExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+    import sqlContext.implicits._
+    // $example on$
+    // Read in the ratings data
+    val ratings = sc.textFile("data/mllib/sample_movielens_data.txt").map { line =>
+      val fields = line.split("::")
+      Rating(fields(0).toInt, fields(1).toInt, fields(2).toDouble - 2.5)
+    }.cache()
+
+    // Map ratings to 1 or 0, 1 indicating a movie that should be recommended
+    val binarizedRatings = ratings.map(r => Rating(r.user, r.product,
+      if (r.rating > 0) 1.0 else 0.0)).cache()
+
+    // Summarize ratings
+    val numRatings = ratings.count()
+    val numUsers = ratings.map(_.user).distinct().count()
+    val numMovies = ratings.map(_.product).distinct().count()
+    println(s"Got $numRatings ratings from $numUsers users on $numMovies movies.")
+
+    // Build the model
+    val numIterations = 10
+    val rank = 10
+    val lambda = 0.01
+    val model = ALS.train(ratings, rank, numIterations, lambda)
+
+    // Define a function to scale ratings from 0 to 1
+    def scaledRating(r: Rating): Rating = {
+      val scaledRating = math.max(math.min(r.rating, 1.0), 0.0)
+      Rating(r.user, r.product, scaledRating)
+    }
+
+    // Get sorted top ten predictions for each user and then scale from [0, 1]
+    val userRecommended = model.recommendProductsForUsers(10).map { case (user, recs) =>
+      (user, recs.map(scaledRating))
+    }
+
+    // Assume that any movie a user rated 3 or higher (which maps to a 1) is a relevant document
+    // Compare with top ten most relevant documents
+    val userMovies = binarizedRatings.groupBy(_.user)
+    val relevantDocuments = userMovies.join(userRecommended).map { case (user, (actual,
+    predictions)) =>
+      (predictions.map(_.product), actual.filter(_.rating > 0.0).map(_.product).toArray)
+    }
+
+    // Instantiate metrics object
+    val metrics = new RankingMetrics(relevantDocuments)
+
+    // Precision at K
+    Array(1, 3, 5).foreach { k =>
+      println(s"Precision at $k = ${metrics.precisionAt(k)}")
+    }
+
+    // Mean average precision
+    println(s"Mean average precision = ${metrics.meanAveragePrecision}")
+
+    // Normalized discounted cumulative gain
+    Array(1, 3, 5).foreach { k =>
+      println(s"NDCG at $k = ${metrics.ndcgAt(k)}")
+    }
+
+    // Get predictions for each data point
+    val allPredictions = model.predict(ratings.map(r => (r.user, r.product))).map(r => ((r.user,
+      r.product), r.rating))
+    val allRatings = ratings.map(r => ((r.user, r.product), r.rating))
+    val predictionsAndLabels = allPredictions.join(allRatings).map { case ((user, product),
+    (predicted, actual)) =>
+      (predicted, actual)
+    }
+
+    // Get the RMSE using regression metrics
+    val regressionMetrics = new RegressionMetrics(predictionsAndLabels)
+    println(s"RMSE = ${regressionMetrics.rootMeanSquaredError}")
+
+    // R-squared
+    println(s"R-squared = ${regressionMetrics.r2}")
+    // $example off$
+  }
+}
+// scalastyle:on println
diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/RegressionMetricsExample.scala b/examples/src/main/scala/org/apache/spark/examples/mllib/RegressionMetricsExample.scala
new file mode 100644
index 000000000000..47d44532521c
--- /dev/null
+++ b/examples/src/main/scala/org/apache/spark/examples/mllib/RegressionMetricsExample.scala
@@ -0,0 +1,67 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+// scalastyle:off println
+
+package org.apache.spark.examples.mllib
+
+// $example on$
+import org.apache.spark.mllib.regression.LinearRegressionWithSGD
+import org.apache.spark.mllib.evaluation.RegressionMetrics
+import org.apache.spark.mllib.util.MLUtils
+// $example off$
+import org.apache.spark.sql.SQLContext
+import org.apache.spark.{SparkConf, SparkContext}
+
+object RegressionMetricsExample {
+  def main(args: Array[String]) : Unit = {
+    val conf = new SparkConf().setAppName("RegressionMetricsExample")
+    val sc = new SparkContext(conf)
+    val sqlContext = new SQLContext(sc)
+    // $example on$
+    // Load the data
+    val data = MLUtils.loadLibSVMFile(sc, "data/mllib/sample_linear_regression_data.txt").cache()
+
+    // Build the model
+    val numIterations = 100
+    val model = LinearRegressionWithSGD.train(data, numIterations)
+
+    // Get predictions
+    val valuesAndPreds = data.map{ point =>
+      val prediction = model.predict(point.features)
+      (prediction, point.label)
+    }
+
+    // Instantiate metrics object
+    val metrics = new RegressionMetrics(valuesAndPreds)
+
+    // Squared error
+    println(s"MSE = ${metrics.meanSquaredError}")
+    println(s"RMSE = ${metrics.rootMeanSquaredError}")
+
+    // R-squared
+    println(s"R-squared = ${metrics.r2}")
+
+    // Mean absolute error
+    println(s"MAE = ${metrics.meanAbsoluteError}")
+
+    // Explained variance
+    println(s"Explained variance = ${metrics.explainedVariance}")
+    // $example off$
+  }
+}
+// scalastyle:on println
+

From 58b4e4f88a330135c4cec04a30d24ef91bc61d91 Mon Sep 17 00:00:00 2001
From: Nong Li <nong@databricks.com>
Date: Fri, 20 Nov 2015 15:30:53 -0800
Subject: [PATCH 833/896] [SPARK-11787][SPARK-11883][SQL][FOLLOW-UP] Cleanup
 for this patch.

This mainly moves SqlNewHadoopRDD to the sql package. There is some state that is
shared between core and I've left that in core. This allows some other associated
minor cleanup.

Author: Nong Li <nong@databricks.com>

Closes #9845 from nongli/spark-11787.
---
 .../org/apache/spark/rdd/HadoopRDD.scala      |  6 +-
 .../spark/rdd/SqlNewHadoopRDDState.scala      | 41 +++++++++++++
 .../sql/catalyst/expressions/UnsafeRow.java   | 59 ++++++++++++++----
 .../catalyst/expressions/InputFileName.scala  |  6 +-
 .../parquet/UnsafeRowParquetRecordReader.java | 14 +++++
 .../scala/org/apache/spark/sql/SQLConf.scala  |  5 ++
 .../datasources}/SqlNewHadoopRDD.scala        | 60 +++++++------------
 .../datasources/parquet/ParquetRelation.scala |  2 +-
 .../parquet/ParquetFilterSuite.scala          | 43 ++++++-------
 .../datasources/parquet/ParquetIOSuite.scala  | 19 ++++++
 10 files changed, 175 insertions(+), 80 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDDState.scala
 rename {core/src/main/scala/org/apache/spark/rdd => sql/core/src/main/scala/org/apache/spark/sql/execution/datasources}/SqlNewHadoopRDD.scala (86%)

diff --git a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
index 7db583468792..f37c95bedc0a 100644
--- a/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
+++ b/core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala
@@ -215,8 +215,8 @@ class HadoopRDD[K, V](
 
       // Sets the thread local variable for the file's name
       split.inputSplit.value match {
-        case fs: FileSplit => SqlNewHadoopRDD.setInputFileName(fs.getPath.toString)
-        case _ => SqlNewHadoopRDD.unsetInputFileName()
+        case fs: FileSplit => SqlNewHadoopRDDState.setInputFileName(fs.getPath.toString)
+        case _ => SqlNewHadoopRDDState.unsetInputFileName()
       }
 
       // Find a function that will return the FileSystem bytes read by this thread. Do this before
@@ -256,7 +256,7 @@ class HadoopRDD[K, V](
 
       override def close() {
         if (reader != null) {
-          SqlNewHadoopRDD.unsetInputFileName()
+          SqlNewHadoopRDDState.unsetInputFileName()
           // Close the reader and release it. Note: it's very important that we don't close the
           // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
           // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
diff --git a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDDState.scala b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDDState.scala
new file mode 100644
index 000000000000..3f15fff79366
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDDState.scala
@@ -0,0 +1,41 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.rdd
+
+import org.apache.spark.unsafe.types.UTF8String
+
+/**
+ * State for SqlNewHadoopRDD objects. This is split this way because of the package splits.
+ * TODO: Move/Combine this with org.apache.spark.sql.datasources.SqlNewHadoopRDD
+ */
+private[spark] object SqlNewHadoopRDDState {
+  /**
+   * The thread variable for the name of the current file being read. This is used by
+   * the InputFileName function in Spark SQL.
+   */
+  private[this] val inputFileName: ThreadLocal[UTF8String] = new ThreadLocal[UTF8String] {
+    override protected def initialValue(): UTF8String = UTF8String.fromString("")
+  }
+
+  def getInputFileName(): UTF8String = inputFileName.get()
+
+  private[spark] def setInputFileName(file: String) = inputFileName.set(UTF8String.fromString(file))
+
+  private[spark] def unsetInputFileName(): Unit = inputFileName.remove()
+
+}
diff --git a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
index 33769363a0ed..b6979d0c8297 100644
--- a/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
+++ b/sql/catalyst/src/main/java/org/apache/spark/sql/catalyst/expressions/UnsafeRow.java
@@ -17,7 +17,11 @@
 
 package org.apache.spark.sql.catalyst.expressions;
 
-import java.io.*;
+import java.io.Externalizable;
+import java.io.IOException;
+import java.io.ObjectInput;
+import java.io.ObjectOutput;
+import java.io.OutputStream;
 import java.math.BigDecimal;
 import java.math.BigInteger;
 import java.nio.ByteBuffer;
@@ -26,12 +30,26 @@
 import java.util.HashSet;
 import java.util.Set;
 
-import com.esotericsoftware.kryo.Kryo;
-import com.esotericsoftware.kryo.KryoSerializable;
-import com.esotericsoftware.kryo.io.Input;
-import com.esotericsoftware.kryo.io.Output;
-
-import org.apache.spark.sql.types.*;
+import org.apache.spark.sql.types.ArrayType;
+import org.apache.spark.sql.types.BinaryType;
+import org.apache.spark.sql.types.BooleanType;
+import org.apache.spark.sql.types.ByteType;
+import org.apache.spark.sql.types.CalendarIntervalType;
+import org.apache.spark.sql.types.DataType;
+import org.apache.spark.sql.types.DateType;
+import org.apache.spark.sql.types.Decimal;
+import org.apache.spark.sql.types.DecimalType;
+import org.apache.spark.sql.types.DoubleType;
+import org.apache.spark.sql.types.FloatType;
+import org.apache.spark.sql.types.IntegerType;
+import org.apache.spark.sql.types.LongType;
+import org.apache.spark.sql.types.MapType;
+import org.apache.spark.sql.types.NullType;
+import org.apache.spark.sql.types.ShortType;
+import org.apache.spark.sql.types.StringType;
+import org.apache.spark.sql.types.StructType;
+import org.apache.spark.sql.types.TimestampType;
+import org.apache.spark.sql.types.UserDefinedType;
 import org.apache.spark.unsafe.Platform;
 import org.apache.spark.unsafe.array.ByteArrayMethods;
 import org.apache.spark.unsafe.bitset.BitSetMethods;
@@ -39,9 +57,23 @@
 import org.apache.spark.unsafe.types.CalendarInterval;
 import org.apache.spark.unsafe.types.UTF8String;
 
-import static org.apache.spark.sql.types.DataTypes.*;
+import static org.apache.spark.sql.types.DataTypes.BooleanType;
+import static org.apache.spark.sql.types.DataTypes.ByteType;
+import static org.apache.spark.sql.types.DataTypes.DateType;
+import static org.apache.spark.sql.types.DataTypes.DoubleType;
+import static org.apache.spark.sql.types.DataTypes.FloatType;
+import static org.apache.spark.sql.types.DataTypes.IntegerType;
+import static org.apache.spark.sql.types.DataTypes.LongType;
+import static org.apache.spark.sql.types.DataTypes.NullType;
+import static org.apache.spark.sql.types.DataTypes.ShortType;
+import static org.apache.spark.sql.types.DataTypes.TimestampType;
 import static org.apache.spark.unsafe.Platform.BYTE_ARRAY_OFFSET;
 
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.KryoSerializable;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+
 /**
  * An Unsafe implementation of Row which is backed by raw memory instead of Java objects.
  *
@@ -116,11 +148,6 @@ public static boolean isMutable(DataType dt) {
   /** The size of this row's backing data, in bytes) */
   private int sizeInBytes;
 
-  private void setNotNullAt(int i) {
-    assertIndexIsValid(i);
-    BitSetMethods.unset(baseObject, baseOffset, i);
-  }
-
   /** The width of the null tracking bit set, in bytes */
   private int bitSetWidthInBytes;
 
@@ -187,6 +214,12 @@ public void pointTo(byte[] buf, int sizeInBytes) {
     pointTo(buf, numFields, sizeInBytes);
   }
 
+
+  public void setNotNullAt(int i) {
+    assertIndexIsValid(i);
+    BitSetMethods.unset(baseObject, baseOffset, i);
+  }
+
   @Override
   public void setNullAt(int i) {
     assertIndexIsValid(i);
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
index d809877817a5..bf215783fc27 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/InputFileName.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark.sql.catalyst.expressions
 
-import org.apache.spark.rdd.SqlNewHadoopRDD
+import org.apache.spark.rdd.SqlNewHadoopRDDState
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.codegen.{GeneratedExpressionCode, CodeGenContext}
 import org.apache.spark.sql.types.{DataType, StringType}
@@ -37,13 +37,13 @@ case class InputFileName() extends LeafExpression with Nondeterministic {
   override protected def initInternal(): Unit = {}
 
   override protected def evalInternal(input: InternalRow): UTF8String = {
-    SqlNewHadoopRDD.getInputFileName()
+    SqlNewHadoopRDDState.getInputFileName()
   }
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
     ev.isNull = "false"
     s"final ${ctx.javaType(dataType)} ${ev.value} = " +
-      "org.apache.spark.rdd.SqlNewHadoopRDD.getInputFileName();"
+      "org.apache.spark.rdd.SqlNewHadoopRDDState.getInputFileName();"
   }
 
 }
diff --git a/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java
index 8a92e489ccb7..dade488ca281 100644
--- a/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java
+++ b/sql/core/src/main/java/org/apache/spark/sql/execution/datasources/parquet/UnsafeRowParquetRecordReader.java
@@ -108,6 +108,19 @@ public class UnsafeRowParquetRecordReader extends SpecificParquetRecordReaderBas
    */
   private static final int DEFAULT_VAR_LEN_SIZE = 32;
 
+  /**
+   * Tries to initialize the reader for this split. Returns true if this reader supports reading
+   * this split and false otherwise.
+   */
+  public boolean tryInitialize(InputSplit inputSplit, TaskAttemptContext taskAttemptContext) {
+    try {
+      initialize(inputSplit, taskAttemptContext);
+      return true;
+    } catch (Exception e) {
+      return false;
+    }
+  }
+
   /**
    * Implementation of RecordReader API.
    */
@@ -326,6 +339,7 @@ private void decodeBinaryBatch(int col, int num) throws IOException {
         } else {
           rowWriters[n].write(col, bytes.array(), bytes.position(), len);
         }
+        rows[n].setNotNullAt(col);
       } else {
         rows[n].setNullAt(col);
       }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
index f40e603cd193..5ef3a48c56a8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala
@@ -323,6 +323,11 @@ private[spark] object SQLConf {
       "option must be set in Hadoop Configuration.  2. This option overrides " +
       "\"spark.sql.sources.outputCommitterClass\".")
 
+  val PARQUET_UNSAFE_ROW_RECORD_READER_ENABLED = booleanConf(
+    key = "spark.sql.parquet.enableUnsafeRowRecordReader",
+    defaultValue = Some(true),
+    doc = "Enables using the custom ParquetUnsafeRowRecordReader.")
+
   val ORC_FILTER_PUSHDOWN_ENABLED = booleanConf("spark.sql.orc.filterPushdown",
     defaultValue = Some(false),
     doc = "When true, enable filter pushdown for ORC files.")
diff --git a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SqlNewHadoopRDD.scala
similarity index 86%
rename from core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SqlNewHadoopRDD.scala
index 4d176332b69c..56cb63d9eff2 100644
--- a/core/src/main/scala/org/apache/spark/rdd/SqlNewHadoopRDD.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/SqlNewHadoopRDD.scala
@@ -20,6 +20,8 @@ package org.apache.spark.rdd
 import java.text.SimpleDateFormat
 import java.util.Date
 
+import scala.reflect.ClassTag
+
 import org.apache.hadoop.conf.{Configurable, Configuration}
 import org.apache.hadoop.io.Writable
 import org.apache.hadoop.mapreduce._
@@ -28,13 +30,12 @@ import org.apache.spark.broadcast.Broadcast
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.executor.DataReadMethod
 import org.apache.spark.mapreduce.SparkHadoopMapReduceUtil
+import org.apache.spark.sql.{SQLConf, SQLContext}
+import org.apache.spark.sql.execution.datasources.parquet.UnsafeRowParquetRecordReader
 import org.apache.spark.storage.StorageLevel
-import org.apache.spark.unsafe.types.UTF8String
-import org.apache.spark.util.{Utils, SerializableConfiguration, ShutdownHookManager}
+import org.apache.spark.util.{SerializableConfiguration, ShutdownHookManager}
 import org.apache.spark.{Partition => SparkPartition, _}
 
-import scala.reflect.ClassTag
-
 
 private[spark] class SqlNewHadoopPartition(
     rddId: Int,
@@ -61,13 +62,13 @@ private[spark] class SqlNewHadoopPartition(
  * changes based on [[org.apache.spark.rdd.HadoopRDD]].
  */
 private[spark] class SqlNewHadoopRDD[V: ClassTag](
-    sc : SparkContext,
+    sqlContext: SQLContext,
     broadcastedConf: Broadcast[SerializableConfiguration],
     @transient private val initDriverSideJobFuncOpt: Option[Job => Unit],
     initLocalJobFuncOpt: Option[Job => Unit],
     inputFormatClass: Class[_ <: InputFormat[Void, V]],
     valueClass: Class[V])
-  extends RDD[V](sc, Nil)
+    extends RDD[V](sqlContext.sparkContext, Nil)
   with SparkHadoopMapReduceUtil
   with Logging {
 
@@ -99,7 +100,7 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
   // If true, enable using the custom RecordReader for parquet. This only works for
   // a subset of the types (no complex types).
   protected val enableUnsafeRowParquetReader: Boolean =
-      sc.conf.getBoolean("spark.parquet.enableUnsafeRowRecordReader", true)
+    sqlContext.getConf(SQLConf.PARQUET_UNSAFE_ROW_RECORD_READER_ENABLED.key).toBoolean
 
   override def getPartitions: Array[SparkPartition] = {
     val conf = getConf(isDriverSide = true)
@@ -120,8 +121,8 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
   }
 
   override def compute(
-      theSplit: SparkPartition,
-      context: TaskContext): Iterator[V] = {
+    theSplit: SparkPartition,
+    context: TaskContext): Iterator[V] = {
     val iter = new Iterator[V] {
       val split = theSplit.asInstanceOf[SqlNewHadoopPartition]
       logInfo("Input split: " + split.serializableHadoopSplit)
@@ -132,8 +133,8 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
 
       // Sets the thread local variable for the file's name
       split.serializableHadoopSplit.value match {
-        case fs: FileSplit => SqlNewHadoopRDD.setInputFileName(fs.getPath.toString)
-        case _ => SqlNewHadoopRDD.unsetInputFileName()
+        case fs: FileSplit => SqlNewHadoopRDDState.setInputFileName(fs.getPath.toString)
+        case _ => SqlNewHadoopRDDState.unsetInputFileName()
       }
 
       // Find a function that will return the FileSystem bytes read by this thread. Do this before
@@ -163,15 +164,13 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
         * TODO: plumb this through a different way?
         */
       if (enableUnsafeRowParquetReader &&
-          format.getClass.getName == "org.apache.parquet.hadoop.ParquetInputFormat") {
-        // TODO: move this class to sql.execution and remove this.
-        reader = Utils.classForName(
-          "org.apache.spark.sql.execution.datasources.parquet.UnsafeRowParquetRecordReader")
-          .newInstance().asInstanceOf[RecordReader[Void, V]]
-        try {
-          reader.initialize(split.serializableHadoopSplit.value, hadoopAttemptContext)
-        } catch {
-          case e: Exception => reader = null
+        format.getClass.getName == "org.apache.parquet.hadoop.ParquetInputFormat") {
+        val parquetReader: UnsafeRowParquetRecordReader = new UnsafeRowParquetRecordReader()
+        if (!parquetReader.tryInitialize(
+            split.serializableHadoopSplit.value, hadoopAttemptContext)) {
+          parquetReader.close()
+        } else {
+          reader = parquetReader.asInstanceOf[RecordReader[Void, V]]
         }
       }
 
@@ -217,7 +216,7 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
 
       private def close() {
         if (reader != null) {
-          SqlNewHadoopRDD.unsetInputFileName()
+          SqlNewHadoopRDDState.unsetInputFileName()
           // Close the reader and release it. Note: it's very important that we don't close the
           // reader more than once, since that exposes us to MAPREDUCE-5918 when running against
           // Hadoop 1.x and older Hadoop 2.x releases. That bug can lead to non-deterministic
@@ -235,7 +234,7 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
           if (bytesReadCallback.isDefined) {
             inputMetrics.updateBytesRead()
           } else if (split.serializableHadoopSplit.value.isInstanceOf[FileSplit] ||
-                     split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
+            split.serializableHadoopSplit.value.isInstanceOf[CombineFileSplit]) {
             // If we can't get the bytes read from the FS stats, fall back to the split size,
             // which may be inaccurate.
             try {
@@ -276,23 +275,6 @@ private[spark] class SqlNewHadoopRDD[V: ClassTag](
     }
     super.persist(storageLevel)
   }
-}
-
-private[spark] object SqlNewHadoopRDD {
-
-  /**
-   * The thread variable for the name of the current file being read. This is used by
-   * the InputFileName function in Spark SQL.
-   */
-  private[this] val inputFileName: ThreadLocal[UTF8String] = new ThreadLocal[UTF8String] {
-    override protected def initialValue(): UTF8String = UTF8String.fromString("")
-  }
-
-  def getInputFileName(): UTF8String = inputFileName.get()
-
-  private[spark] def setInputFileName(file: String) = inputFileName.set(UTF8String.fromString(file))
-
-  private[spark] def unsetInputFileName(): Unit = inputFileName.remove()
 
   /**
    * Analogous to [[org.apache.spark.rdd.MapPartitionsRDD]], but passes in an InputSplit to
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
index cb0aab8cc0d0..fdd745f48e97 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetRelation.scala
@@ -319,7 +319,7 @@ private[sql] class ParquetRelation(
 
     Utils.withDummyCallSite(sqlContext.sparkContext) {
       new SqlNewHadoopRDD(
-        sc = sqlContext.sparkContext,
+        sqlContext = sqlContext,
         broadcastedConf = broadcastedConf,
         initDriverSideJobFuncOpt = Some(setInputPaths),
         initLocalJobFuncOpt = Some(initLocalJobFuncOpt),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
index c8028a5ef552..cc5aae03d551 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetFilterSuite.scala
@@ -337,29 +337,30 @@ class ParquetFilterSuite extends QueryTest with ParquetTest with SharedSQLContex
     }
   }
 
-  // Renable when we can toggle custom ParquetRecordReader on/off. The custom reader does
-  // not do row by row filtering (and we probably don't want to push that).
-  ignore("SPARK-11661 Still pushdown filters returned by unhandledFilters") {
+  // The unsafe row RecordReader does not support row by row filtering so run it with it disabled.
+  test("SPARK-11661 Still pushdown filters returned by unhandledFilters") {
     import testImplicits._
     withSQLConf(SQLConf.PARQUET_FILTER_PUSHDOWN_ENABLED.key -> "true") {
-      withTempPath { dir =>
-        val path = s"${dir.getCanonicalPath}/part=1"
-        (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(path)
-        val df = sqlContext.read.parquet(path).filter("a = 2")
-
-        // This is the source RDD without Spark-side filtering.
-        val childRDD =
-          df
-            .queryExecution
-            .executedPlan.asInstanceOf[org.apache.spark.sql.execution.Filter]
-            .child
-            .execute()
-
-        // The result should be single row.
-        // When a filter is pushed to Parquet, Parquet can apply it to every row.
-        // So, we can check the number of rows returned from the Parquet
-        // to make sure our filter pushdown work.
-        assert(childRDD.count == 1)
+      withSQLConf(SQLConf.PARQUET_UNSAFE_ROW_RECORD_READER_ENABLED.key -> "false") {
+        withTempPath { dir =>
+          val path = s"${dir.getCanonicalPath}/part=1"
+          (1 to 3).map(i => (i, i.toString)).toDF("a", "b").write.parquet(path)
+          val df = sqlContext.read.parquet(path).filter("a = 2")
+
+          // This is the source RDD without Spark-side filtering.
+          val childRDD =
+            df
+              .queryExecution
+              .executedPlan.asInstanceOf[org.apache.spark.sql.execution.Filter]
+              .child
+              .execute()
+
+          // The result should be single row.
+          // When a filter is pushed to Parquet, Parquet can apply it to every row.
+          // So, we can check the number of rows returned from the Parquet
+          // to make sure our filter pushdown work.
+          assert(childRDD.count == 1)
+        }
       }
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
index 177ab42f7767..0c5d4887ed79 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/parquet/ParquetIOSuite.scala
@@ -579,6 +579,25 @@ class ParquetIOSuite extends QueryTest with ParquetTest with SharedSQLContext {
     }
   }
 
+  test("null and non-null strings") {
+    // Create a dataset where the first values are NULL and then some non-null values. The
+    // number of non-nulls needs to be bigger than the ParquetReader batch size.
+    val data = sqlContext.range(200).map { i =>
+      if (i.getLong(0) < 150) Row(None)
+      else Row("a")
+    }
+    val df = sqlContext.createDataFrame(data, StructType(StructField("col", StringType) :: Nil))
+    assert(df.agg("col" -> "count").collect().head.getLong(0) == 50)
+
+    withTempPath { dir =>
+      val path = s"${dir.getCanonicalPath}/data"
+      df.write.parquet(path)
+
+      val df2 = sqlContext.read.parquet(path)
+      assert(df2.agg("col" -> "count").collect().head.getLong(0) == 50)
+    }
+  }
+
   test("read dictionary encoded decimals written as INT32") {
     checkAnswer(
       // Decimal column in this file is encoded using plain dictionary

From 968acf3bd9a502fcad15df3e53e359695ae702cc Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Fri, 20 Nov 2015 15:36:30 -0800
Subject: [PATCH 834/896] [SPARK-11889][SQL] Fix type inference for
 GroupedDataset.agg in REPL

In this PR I delete a method that breaks type inference for aggregators (only in the REPL)

The error when this method is present is:
```
<console>:38: error: missing parameter type for expanded function ((x$2) => x$2._2)
              ds.groupBy(_._1).agg(sum(_._2), sum(_._3)).collect()
```

Author: Michael Armbrust <michael@databricks.com>

Closes #9870 from marmbrus/dataset-repl-agg.
---
 .../org/apache/spark/repl/ReplSuite.scala     | 24 +++++++++++++++++
 .../org/apache/spark/sql/GroupedDataset.scala | 27 +++----------------
 .../apache/spark/sql/JavaDatasetSuite.java    |  8 +++---
 3 files changed, 30 insertions(+), 29 deletions(-)

diff --git a/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala b/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
index 081aa03002cc..cbcccb11f14a 100644
--- a/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
+++ b/repl/scala-2.10/src/test/scala/org/apache/spark/repl/ReplSuite.scala
@@ -339,6 +339,30 @@ class ReplSuite extends SparkFunSuite {
     }
   }
 
+  test("Datasets agg type-inference") {
+    val output = runInterpreter("local",
+      """
+        |import org.apache.spark.sql.functions._
+        |import org.apache.spark.sql.Encoder
+        |import org.apache.spark.sql.expressions.Aggregator
+        |import org.apache.spark.sql.TypedColumn
+        |/** An `Aggregator` that adds up any numeric type returned by the given function. */
+        |class SumOf[I, N : Numeric](f: I => N) extends Aggregator[I, N, N] with Serializable {
+        |  val numeric = implicitly[Numeric[N]]
+        |  override def zero: N = numeric.zero
+        |  override def reduce(b: N, a: I): N = numeric.plus(b, f(a))
+        |  override def merge(b1: N,b2: N): N = numeric.plus(b1, b2)
+        |  override def finish(reduction: N): N = reduction
+        |}
+        |
+        |def sum[I, N : Numeric : Encoder](f: I => N): TypedColumn[I, N] = new SumOf(f).toColumn
+        |val ds = Seq((1, 1, 2L), (1, 2, 3L), (1, 3, 4L), (2, 1, 5L)).toDS()
+        |ds.groupBy(_._1).agg(sum(_._2), sum(_._3)).collect()
+      """.stripMargin)
+    assertDoesNotContain("error:", output)
+    assertDoesNotContain("Exception", output)
+  }
+
   test("collecting objects of class defined in repl") {
     val output = runInterpreter("local[2]",
       """
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 6de3dd626576..263f04910476 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -146,31 +146,10 @@ class GroupedDataset[K, T] private[sql](
     reduce(f.call _)
   }
 
-  /**
-   * Compute aggregates by specifying a series of aggregate columns, and return a [[DataFrame]].
-   * We can call `as[T : Encoder]` to turn the returned [[DataFrame]] to [[Dataset]] again.
-   *
-   * The available aggregate methods are defined in [[org.apache.spark.sql.functions]].
-   *
-   * {{{
-   *   // Selects the age of the oldest employee and the aggregate expense for each department
-   *
-   *   // Scala:
-   *   import org.apache.spark.sql.functions._
-   *   df.groupBy("department").agg(max("age"), sum("expense"))
-   *
-   *   // Java:
-   *   import static org.apache.spark.sql.functions.*;
-   *   df.groupBy("department").agg(max("age"), sum("expense"));
-   * }}}
-   *
-   * We can also use `Aggregator.toColumn` to pass in typed aggregate functions.
-   *
-   * @since 1.6.0
-   */
+  // This is here to prevent us from adding overloads that would be ambiguous.
   @scala.annotation.varargs
-  def agg(expr: Column, exprs: Column*): DataFrame =
-    groupedData.agg(withEncoder(expr), exprs.map(withEncoder): _*)
+  private def agg(exprs: Column*): DataFrame =
+    groupedData.agg(withEncoder(exprs.head), exprs.tail.map(withEncoder): _*)
 
   private def withEncoder(c: Column): Column = c match {
     case tc: TypedColumn[_, _] =>
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index ce40dd856f67..f7249b8945c4 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -404,11 +404,9 @@ public String call(Tuple2<String, Integer> value) throws Exception {
       grouped.agg(new IntSumOf().toColumn(Encoders.INT(), Encoders.INT()));
     Assert.assertEquals(Arrays.asList(tuple2("a", 3), tuple2("b", 3)), agged.collectAsList());
 
-    Dataset<Tuple4<String, Integer, Long, Long>> agged2 = grouped.agg(
-      new IntSumOf().toColumn(Encoders.INT(), Encoders.INT()),
-      expr("sum(_2)"),
-      count("*"))
-      .as(Encoders.tuple(Encoders.STRING(), Encoders.INT(), Encoders.LONG(), Encoders.LONG()));
+    Dataset<Tuple2<String, Integer>> agged2 = grouped.agg(
+      new IntSumOf().toColumn(Encoders.INT(), Encoders.INT()))
+      .as(Encoders.tuple(Encoders.STRING(), Encoders.INT()));
     Assert.assertEquals(
       Arrays.asList(
         new Tuple4<>("a", 3, 3L, 2L),

From 68ed046836975b492b594967256d3c7951b568a5 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Fri, 20 Nov 2015 15:38:04 -0800
Subject: [PATCH 835/896] [SPARK-11890][SQL] Fix compilation for Scala 2.11

Author: Michael Armbrust <michael@databricks.com>

Closes #9871 from marmbrus/scala211-break.
---
 .../scala/org/apache/spark/sql/catalyst/ScalaReflection.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 918050b531c0..4a4a62ed1a46 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -670,14 +670,14 @@ trait ScalaReflection {
    * Unlike `schemaFor`, this method won't throw exception for un-supported type, it will return
    * `NullType` silently instead.
    */
-  private def silentSchemaFor(tpe: `Type`): Schema = try {
+  protected def silentSchemaFor(tpe: `Type`): Schema = try {
     schemaFor(tpe)
   } catch {
     case _: UnsupportedOperationException => Schema(NullType, nullable = true)
   }
 
   /** Returns the full class name for a type. */
-  private def getClassNameFromType(tpe: `Type`): String = {
+  protected def getClassNameFromType(tpe: `Type`): String = {
     tpe.erasure.typeSymbol.asClass.fullName
   }
 

From 47815878ad5e47e89bfbd57acb848be2ce67a4a5 Mon Sep 17 00:00:00 2001
From: Michael Armbrust <michael@databricks.com>
Date: Fri, 20 Nov 2015 16:02:03 -0800
Subject: [PATCH 836/896] [HOTFIX] Fix Java Dataset Tests

---
 .../test/java/test/org/apache/spark/sql/JavaDatasetSuite.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index f7249b8945c4..f32374b4c04d 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -409,8 +409,8 @@ public String call(Tuple2<String, Integer> value) throws Exception {
       .as(Encoders.tuple(Encoders.STRING(), Encoders.INT()));
     Assert.assertEquals(
       Arrays.asList(
-        new Tuple4<>("a", 3, 3L, 2L),
-        new Tuple4<>("b", 3, 3L, 1L)),
+        new Tuple2<>("a", 3),
+        new Tuple2<>("b", 3)),
       agged2.collectAsList());
   }
 

From a2dce22e0a25922e2052318d32f32877b7c27ec2 Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Fri, 20 Nov 2015 16:51:47 -0800
Subject: [PATCH 837/896] Revert "[SPARK-11689][ML] Add user guide and example
 code for LDA under spark.ml"

This reverts commit e359d5dcf5bd300213054ebeae9fe75c4f7eb9e7.
---
 docs/ml-clustering.md                         | 30 ------
 docs/ml-guide.md                              |  3 +-
 docs/mllib-guide.md                           |  1 -
 .../spark/examples/ml/JavaLDAExample.java     | 94 -------------------
 .../apache/spark/examples/ml/LDAExample.scala | 77 ---------------
 5 files changed, 1 insertion(+), 204 deletions(-)
 delete mode 100644 docs/ml-clustering.md
 delete mode 100644 examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
 delete mode 100644 examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala

diff --git a/docs/ml-clustering.md b/docs/ml-clustering.md
deleted file mode 100644
index 1743ef43a6dd..000000000000
--- a/docs/ml-clustering.md
+++ /dev/null
@@ -1,30 +0,0 @@
----
-layout: global
-title: Clustering - ML
-displayTitle: <a href="ml-guide.html">ML</a> - Clustering
----
-
-In this section, we introduce the pipeline API for [clustering in mllib](mllib-clustering.html).
-
-## Latent Dirichlet allocation (LDA)
-
-`LDA` is implemented as an `Estimator` that supports both `EMLDAOptimizer` and `OnlineLDAOptimizer`,
-and generates a `LDAModel` as the base models. Expert users may cast a `LDAModel` generated by
-`EMLDAOptimizer` to a `DistributedLDAModel` if needed.
-
-<div class="codetabs">
-
-Refer to the [Scala API docs](api/scala/index.html#org.apache.spark.ml.clustering.LDA) for more details.
-
-<div data-lang="scala" markdown="1">
-{% include_example scala/org/apache/spark/examples/ml/LDAExample.scala %}
-</div>
-
-<div data-lang="java" markdown="1">
-
-Refer to the [Java API docs](api/java/org/apache/spark/ml/clustering/LDA.html) for more details.
-
-{% include_example java/org/apache/spark/examples/ml/JavaLDAExample.java %}
-</div>
-
-</div>
\ No newline at end of file
diff --git a/docs/ml-guide.md b/docs/ml-guide.md
index 6f35b30c3d4d..be18a05361a1 100644
--- a/docs/ml-guide.md
+++ b/docs/ml-guide.md
@@ -40,7 +40,6 @@ Also, some algorithms have additional capabilities in the `spark.ml` API; e.g.,
 provide class probabilities, and linear models provide model summaries.
 
 * [Feature extraction, transformation, and selection](ml-features.html)
-* [Clustering](ml-clustering.html)
 * [Decision Trees for classification and regression](ml-decision-tree.html)
 * [Ensembles](ml-ensembles.html)
 * [Linear methods with elastic net regularization](ml-linear-methods.html)
@@ -951,4 +950,4 @@ model.transform(test)
 {% endhighlight %}
 </div>
 
-</div>
\ No newline at end of file
+</div>
diff --git a/docs/mllib-guide.md b/docs/mllib-guide.md
index 54e35fcbb15a..91e50ccfecec 100644
--- a/docs/mllib-guide.md
+++ b/docs/mllib-guide.md
@@ -69,7 +69,6 @@ We list major functionality from both below, with links to detailed guides.
 concepts. It also contains sections on using algorithms within the Pipelines API, for example:
 
 * [Feature extraction, transformation, and selection](ml-features.html)
-* [Clustering](ml-clustering.html)
 * [Decision trees for classification and regression](ml-decision-tree.html)
 * [Ensembles](ml-ensembles.html)
 * [Linear methods with elastic net regularization](ml-linear-methods.html)
diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
deleted file mode 100644
index b3a7d2eb2978..000000000000
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaLDAExample.java
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.examples.ml;
-
-import java.util.regex.Pattern;
-
-import org.apache.spark.SparkConf;
-import org.apache.spark.api.java.JavaRDD;
-import org.apache.spark.api.java.JavaSparkContext;
-import org.apache.spark.api.java.function.Function;
-import org.apache.spark.ml.clustering.LDA;
-import org.apache.spark.ml.clustering.LDAModel;
-import org.apache.spark.mllib.linalg.Vector;
-import org.apache.spark.mllib.linalg.VectorUDT;
-import org.apache.spark.mllib.linalg.Vectors;
-import org.apache.spark.sql.DataFrame;
-import org.apache.spark.sql.Row;
-import org.apache.spark.sql.SQLContext;
-import org.apache.spark.sql.catalyst.expressions.GenericRow;
-import org.apache.spark.sql.types.Metadata;
-import org.apache.spark.sql.types.StructField;
-import org.apache.spark.sql.types.StructType;
-
-/**
- * An example demonstrating LDA
- * Run with
- * <pre>
- * bin/run-example ml.JavaLDAExample
- * </pre>
- */
-public class JavaLDAExample {
-
-  private static class ParseVector implements Function<String, Row> {
-    private static final Pattern separator = Pattern.compile(" ");
-
-    @Override
-    public Row call(String line) {
-      String[] tok = separator.split(line);
-      double[] point = new double[tok.length];
-      for (int i = 0; i < tok.length; ++i) {
-        point[i] = Double.parseDouble(tok[i]);
-      }
-      Vector[] points = {Vectors.dense(point)};
-      return new GenericRow(points);
-    }
-  }
-
-  public static void main(String[] args) {
-
-    String inputFile = "data/mllib/sample_lda_data.txt";
-
-    // Parses the arguments
-    SparkConf conf = new SparkConf().setAppName("JavaLDAExample");
-    JavaSparkContext jsc = new JavaSparkContext(conf);
-    SQLContext sqlContext = new SQLContext(jsc);
-
-    // Loads data
-    JavaRDD<Row> points = jsc.textFile(inputFile).map(new ParseVector());
-    StructField[] fields = {new StructField("features", new VectorUDT(), false, Metadata.empty())};
-    StructType schema = new StructType(fields);
-    DataFrame dataset = sqlContext.createDataFrame(points, schema);
-
-    // Trains a LDA model
-    LDA lda = new LDA()
-      .setK(10)
-      .setMaxIter(10);
-    LDAModel model = lda.fit(dataset);
-
-    System.out.println(model.logLikelihood(dataset));
-    System.out.println(model.logPerplexity(dataset));
-
-    // Shows the result
-    DataFrame topics = model.describeTopics(3);
-    topics.show(false);
-    model.transform(dataset).show(false);
-
-    jsc.stop();
-  }
-}
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala
deleted file mode 100644
index 419ce3d87a6a..000000000000
--- a/examples/src/main/scala/org/apache/spark/examples/ml/LDAExample.scala
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.apache.spark.examples.ml
-
-// scalastyle:off println
-import org.apache.spark.{SparkContext, SparkConf}
-import org.apache.spark.mllib.linalg.{VectorUDT, Vectors}
-// $example on$
-import org.apache.spark.ml.clustering.LDA
-import org.apache.spark.sql.{Row, SQLContext}
-import org.apache.spark.sql.types.{StructField, StructType}
-// $example off$
-
-/**
- * An example demonstrating a LDA of ML pipeline.
- * Run with
- * {{{
- * bin/run-example ml.LDAExample
- * }}}
- */
-object LDAExample {
-
-  final val FEATURES_COL = "features"
-
-  def main(args: Array[String]): Unit = {
-
-    val input = "data/mllib/sample_lda_data.txt"
-    // Creates a Spark context and a SQL context
-    val conf = new SparkConf().setAppName(s"${this.getClass.getSimpleName}")
-    val sc = new SparkContext(conf)
-    val sqlContext = new SQLContext(sc)
-
-    // $example on$
-    // Loads data
-    val rowRDD = sc.textFile(input).filter(_.nonEmpty)
-      .map(_.split(" ").map(_.toDouble)).map(Vectors.dense).map(Row(_))
-    val schema = StructType(Array(StructField(FEATURES_COL, new VectorUDT, false)))
-    val dataset = sqlContext.createDataFrame(rowRDD, schema)
-
-    // Trains a LDA model
-    val lda = new LDA()
-      .setK(10)
-      .setMaxIter(10)
-      .setFeaturesCol(FEATURES_COL)
-    val model = lda.fit(dataset)
-    val transformed = model.transform(dataset)
-
-    val ll = model.logLikelihood(dataset)
-    val lp = model.logPerplexity(dataset)
-
-    // describeTopics
-    val topics = model.describeTopics(3)
-
-    // Shows the result
-    topics.show(false)
-    transformed.show(false)
-
-    // $example off$
-    sc.stop()
-  }
-}
-// scalastyle:on println

From 7d3f922c4ba76c4193f98234ae662065c39cdfb1 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Fri, 20 Nov 2015 23:31:19 -0800
Subject: [PATCH 838/896] [SPARK-11819][SQL][FOLLOW-UP] fix scala 2.11 build

seems scala 2.11 doesn't support: define private methods in `trait xxx` and use it in `object xxx extend xxx`.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9879 from cloud-fan/follow.
---
 .../scala/org/apache/spark/sql/catalyst/ScalaReflection.scala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 4a4a62ed1a46..476becec4dd5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -670,14 +670,14 @@ trait ScalaReflection {
    * Unlike `schemaFor`, this method won't throw exception for un-supported type, it will return
    * `NullType` silently instead.
    */
-  protected def silentSchemaFor(tpe: `Type`): Schema = try {
+  def silentSchemaFor(tpe: `Type`): Schema = try {
     schemaFor(tpe)
   } catch {
     case _: UnsupportedOperationException => Schema(NullType, nullable = true)
   }
 
   /** Returns the full class name for a type. */
-  protected def getClassNameFromType(tpe: `Type`): String = {
+  def getClassNameFromType(tpe: `Type`): String = {
     tpe.erasure.typeSymbol.asClass.fullName
   }
 

From 54328b6d862fe62ae01bdd87df4798ceb9d506d6 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 21 Nov 2015 00:10:13 -0800
Subject: [PATCH 839/896] [SPARK-11900][SQL] Add since version for all encoders

Author: Reynold Xin <rxin@databricks.com>

Closes #9881 from rxin/SPARK-11900.
---
 .../scala/org/apache/spark/sql/Encoder.scala  | 63 +++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 86bb53645903..5cb8edf64e87 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -45,13 +45,52 @@ trait Encoder[T] extends Serializable {
  */
 object Encoders {
 
+  /**
+   * An encoder for nullable boolean type.
+   * @since 1.6.0
+   */
   def BOOLEAN: Encoder[java.lang.Boolean] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable byte type.
+   * @since 1.6.0
+   */
   def BYTE: Encoder[java.lang.Byte] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable short type.
+   * @since 1.6.0
+   */
   def SHORT: Encoder[java.lang.Short] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable int type.
+   * @since 1.6.0
+   */
   def INT: Encoder[java.lang.Integer] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable long type.
+   * @since 1.6.0
+   */
   def LONG: Encoder[java.lang.Long] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable float type.
+   * @since 1.6.0
+   */
   def FLOAT: Encoder[java.lang.Float] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable double type.
+   * @since 1.6.0
+   */
   def DOUBLE: Encoder[java.lang.Double] = ExpressionEncoder()
+
+  /**
+   * An encoder for nullable string type.
+   * @since 1.6.0
+   */
   def STRING: Encoder[java.lang.String] = ExpressionEncoder()
 
   /**
@@ -59,6 +98,8 @@ object Encoders {
    * This encoder maps T into a single byte array (binary) field.
    *
    * T must be publicly accessible.
+   *
+   * @since 1.6.0
    */
   def kryo[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = true)
 
@@ -67,6 +108,8 @@ object Encoders {
    * This encoder maps T into a single byte array (binary) field.
    *
    * T must be publicly accessible.
+   *
+   * @since 1.6.0
    */
   def kryo[T](clazz: Class[T]): Encoder[T] = kryo(ClassTag[T](clazz))
 
@@ -77,6 +120,8 @@ object Encoders {
    * Note that this is extremely inefficient and should only be used as the last resort.
    *
    * T must be publicly accessible.
+   *
+   * @since 1.6.0
    */
   def javaSerialization[T: ClassTag]: Encoder[T] = genericSerializer(useKryo = false)
 
@@ -87,6 +132,8 @@ object Encoders {
    * Note that this is extremely inefficient and should only be used as the last resort.
    *
    * T must be publicly accessible.
+   *
+   * @since 1.6.0
    */
   def javaSerialization[T](clazz: Class[T]): Encoder[T] = javaSerialization(ClassTag[T](clazz))
 
@@ -120,12 +167,20 @@ object Encoders {
     )
   }
 
+  /**
+   * An encoder for 2-ary tuples.
+   * @since 1.6.0
+   */
   def tuple[T1, T2](
       e1: Encoder[T1],
       e2: Encoder[T2]): Encoder[(T1, T2)] = {
     ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2))
   }
 
+  /**
+   * An encoder for 3-ary tuples.
+   * @since 1.6.0
+   */
   def tuple[T1, T2, T3](
       e1: Encoder[T1],
       e2: Encoder[T2],
@@ -133,6 +188,10 @@ object Encoders {
     ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2), encoderFor(e3))
   }
 
+  /**
+   * An encoder for 4-ary tuples.
+   * @since 1.6.0
+   */
   def tuple[T1, T2, T3, T4](
       e1: Encoder[T1],
       e2: Encoder[T2],
@@ -141,6 +200,10 @@ object Encoders {
     ExpressionEncoder.tuple(encoderFor(e1), encoderFor(e2), encoderFor(e3), encoderFor(e4))
   }
 
+  /**
+   * An encoder for 5-ary tuples.
+   * @since 1.6.0
+   */
   def tuple[T1, T2, T3, T4, T5](
       e1: Encoder[T1],
       e2: Encoder[T2],

From 596710268e29e8f624c3ba2fade08b66ec7084eb Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 21 Nov 2015 00:54:18 -0800
Subject: [PATCH 840/896] [SPARK-11901][SQL] API audit for Aggregator.

Author: Reynold Xin <rxin@databricks.com>

Closes #9882 from rxin/SPARK-11901.
---
 .../scala/org/apache/spark/sql/Dataset.scala  |  1 -
 .../spark/sql/expressions/Aggregator.scala    | 39 ++++++++++++-------
 2 files changed, 24 insertions(+), 16 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index bdcdc5d47cba..07647508421a 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -22,7 +22,6 @@ import scala.collection.JavaConverters._
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.rdd.RDD
 import org.apache.spark.api.java.function._
-import org.apache.spark.sql.catalyst.InternalRow
 
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
index 72610e735f78..b0cd32b5f73e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/expressions/Aggregator.scala
@@ -17,11 +17,10 @@
 
 package org.apache.spark.sql.expressions
 
-import org.apache.spark.sql.Encoder
 import org.apache.spark.sql.catalyst.encoders.encoderFor
 import org.apache.spark.sql.catalyst.expressions.aggregate.{AggregateExpression, Complete}
 import org.apache.spark.sql.execution.aggregate.TypedAggregateExpression
-import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
+import org.apache.spark.sql.{DataFrame, Dataset, Encoder, TypedColumn}
 
 /**
  * A base class for user-defined aggregations, which can be used in [[DataFrame]] and [[Dataset]]
@@ -32,55 +31,65 @@ import org.apache.spark.sql.{Dataset, DataFrame, TypedColumn}
  *   case class Data(i: Int)
  *
  *   val customSummer =  new Aggregator[Data, Int, Int] {
- *     def zero = 0
- *     def reduce(b: Int, a: Data) = b + a.i
- *     def present(r: Int) = r
+ *     def zero: Int = 0
+ *     def reduce(b: Int, a: Data): Int = b + a.i
+ *     def merge(b1: Int, b2: Int): Int = b1 + b2
+ *     def present(r: Int): Int = r
  *   }.toColumn()
  *
- *   val ds: Dataset[Data]
+ *   val ds: Dataset[Data] = ...
  *   val aggregated = ds.select(customSummer)
  * }}}
  *
  * Based loosely on Aggregator from Algebird: https://github.com/twitter/algebird
  *
- * @tparam A The input type for the aggregation.
+ * @tparam I The input type for the aggregation.
  * @tparam B The type of the intermediate value of the reduction.
- * @tparam C The type of the final result.
+ * @tparam O The type of the final output result.
+ *
+ * @since 1.6.0
  */
-abstract class Aggregator[-A, B, C] extends Serializable {
+abstract class Aggregator[-I, B, O] extends Serializable {
 
-  /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
+  /**
+   * A zero value for this aggregation. Should satisfy the property that any b + zero = b.
+   * @since 1.6.0
+   */
   def zero: B
 
   /**
    * Combine two values to produce a new value.  For performance, the function may modify `b` and
    * return it instead of constructing new object for b.
+   * @since 1.6.0
    */
-  def reduce(b: B, a: A): B
+  def reduce(b: B, a: I): B
 
   /**
-   * Merge two intermediate values
+   * Merge two intermediate values.
+   * @since 1.6.0
    */
   def merge(b1: B, b2: B): B
 
   /**
    * Transform the output of the reduction.
+   * @since 1.6.0
    */
-  def finish(reduction: B): C
+  def finish(reduction: B): O
 
   /**
    * Returns this `Aggregator` as a [[TypedColumn]] that can be used in [[Dataset]] or [[DataFrame]]
    * operations.
+   * @since 1.6.0
    */
   def toColumn(
       implicit bEncoder: Encoder[B],
-      cEncoder: Encoder[C]): TypedColumn[A, C] = {
+      cEncoder: Encoder[O]): TypedColumn[I, O] = {
     val expr =
       new AggregateExpression(
         TypedAggregateExpression(this),
         Complete,
         false)
 
-    new TypedColumn[A, C](expr, encoderFor[C])
+    new TypedColumn[I, O](expr, encoderFor[O])
   }
 }

From ff442bbcffd4f93cfcc2f76d160011e725d2fb3f Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Sat, 21 Nov 2015 15:00:37 -0800
Subject: [PATCH 841/896] [SPARK-11899][SQL] API audit for GroupedDataset.

1. Renamed map to mapGroup, flatMap to flatMapGroup.
2. Renamed asKey -> keyAs.
3. Added more documentation.
4. Changed type parameter T to V on GroupedDataset.
5. Added since versions for all functions.

Author: Reynold Xin <rxin@databricks.com>

Closes #9880 from rxin/SPARK-11899.
---
 .../api/java/function/MapGroupFunction.java   |   2 +-
 .../scala/org/apache/spark/sql/Encoder.scala  |   4 +
 .../sql/catalyst/JavaTypeInference.scala      |   3 +-
 .../scala/org/apache/spark/sql/Column.scala   |   2 +
 .../org/apache/spark/sql/DataFrame.scala      |   1 -
 .../org/apache/spark/sql/GroupedDataset.scala | 132 ++++++++++++++----
 .../apache/spark/sql/JavaDatasetSuite.java    |   8 +-
 .../spark/sql/DatasetPrimitiveSuite.scala     |   4 +-
 .../org/apache/spark/sql/DatasetSuite.scala   |  20 +--
 9 files changed, 131 insertions(+), 45 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
index 2935f9986a56..4f3f222e064b 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
@@ -21,7 +21,7 @@
 import java.util.Iterator;
 
 /**
- * Base interface for a map function used in GroupedDataset's map function.
+ * Base interface for a map function used in GroupedDataset's mapGroup function.
  */
 public interface MapGroupFunction<K, V, R> extends Serializable {
   R call(K key, Iterator<V> values) throws Exception;
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
index 5cb8edf64e87..03aa25eda807 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/Encoder.scala
@@ -30,6 +30,8 @@ import org.apache.spark.sql.types._
  *
  * Encoders are not intended to be thread-safe and thus they are allow to avoid internal locking
  * and reuse internal buffers to improve performance.
+ *
+ * @since 1.6.0
  */
 trait Encoder[T] extends Serializable {
 
@@ -42,6 +44,8 @@ trait Encoder[T] extends Serializable {
 
 /**
  * Methods for creating encoders.
+ *
+ * @since 1.6.0
  */
 object Encoders {
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/JavaTypeInference.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/JavaTypeInference.scala
index 88a457f87ce4..7d4cfbe6faec 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/JavaTypeInference.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/JavaTypeInference.scala
@@ -29,7 +29,7 @@ import org.apache.spark.sql.types._
 /**
  * Type-inference utilities for POJOs and Java collections.
  */
-private [sql] object JavaTypeInference {
+object JavaTypeInference {
 
   private val iterableType = TypeToken.of(classOf[JIterable[_]])
   private val mapType = TypeToken.of(classOf[JMap[_, _]])
@@ -53,7 +53,6 @@ private [sql] object JavaTypeInference {
    * @return (SQL data type, nullable)
    */
   private def inferDataType(typeToken: TypeToken[_]): (DataType, Boolean) = {
-    // TODO: All of this could probably be moved to Catalyst as it is mostly not Spark specific.
     typeToken.getRawType match {
       case c: Class[_] if c.isAnnotationPresent(classOf[SQLUserDefinedType]) =>
         (c.getAnnotation(classOf[SQLUserDefinedType]).udt().newInstance(), true)
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 82e9cd7f50a3..30c554a85e69 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -46,6 +46,8 @@ private[sql] object Column {
  * @tparam T The input type expected for this expression.  Can be `Any` if the expression is type
  *           checked by the analyzer instead of the compiler (i.e. `expr("sum(...)")`).
  * @tparam U The output type of this column.
+ *
+ * @since 1.6.0
  */
 class TypedColumn[-T, U](
     expr: Expression,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 7abcecaa2880..5586fc994b98 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -110,7 +110,6 @@ private[sql] object DataFrame {
  * @groupname action Actions
  * @since 1.3.0
  */
-// TODO: Improve documentation.
 @Experimental
 class DataFrame private[sql](
     @transient val sqlContext: SQLContext,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 263f04910476..7f43ce16901b 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -25,6 +25,7 @@ import org.apache.spark.sql.catalyst.encoders.{ExpressionEncoder, encoderFor, Ou
 import org.apache.spark.sql.catalyst.expressions.{Alias, CreateStruct, Attribute}
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.QueryExecution
+import org.apache.spark.sql.expressions.Aggregator
 
 /**
  * :: Experimental ::
@@ -36,11 +37,13 @@ import org.apache.spark.sql.execution.QueryExecution
  * making this change to the class hierarchy would break some function signatures. As such, this
  * class should be considered a preview of the final API.  Changes will be made to the interface
  * after Spark 1.6.
+ *
+ * @since 1.6.0
  */
 @Experimental
-class GroupedDataset[K, T] private[sql](
+class GroupedDataset[K, V] private[sql](
     kEncoder: Encoder[K],
-    tEncoder: Encoder[T],
+    tEncoder: Encoder[V],
     val queryExecution: QueryExecution,
     private val dataAttributes: Seq[Attribute],
     private val groupingAttributes: Seq[Attribute]) extends Serializable {
@@ -67,8 +70,10 @@ class GroupedDataset[K, T] private[sql](
   /**
    * Returns a new [[GroupedDataset]] where the type of the key has been mapped to the specified
    * type. The mapping of key columns to the type follows the same rules as `as` on [[Dataset]].
+   *
+   * @since 1.6.0
    */
-  def asKey[L : Encoder]: GroupedDataset[L, T] =
+  def keyAs[L : Encoder]: GroupedDataset[L, V] =
     new GroupedDataset(
       encoderFor[L],
       unresolvedTEncoder,
@@ -78,6 +83,8 @@ class GroupedDataset[K, T] private[sql](
 
   /**
    * Returns a [[Dataset]] that contains each unique key.
+   *
+   * @since 1.6.0
    */
   def keys: Dataset[K] = {
     new Dataset[K](
@@ -92,12 +99,18 @@ class GroupedDataset[K, T] private[sql](
    * function can return an iterator containing elements of an arbitrary type which will be returned
    * as a new [[Dataset]].
    *
+   * This function does not support partial aggregation, and as a result requires shuffling all
+   * the data in the [[Dataset]]. If an application intends to perform an aggregation over each
+   * key, it is best to use the reduce function or an [[Aggregator]].
+   *
    * Internally, the implementation will spill to disk if any given group is too large to fit into
    * memory.  However, users must take care to avoid materializing the whole iterator for a group
    * (for example, by calling `toList`) unless they are sure that this is possible given the memory
    * constraints of their cluster.
+   *
+   * @since 1.6.0
    */
-  def flatMap[U : Encoder](f: (K, Iterator[T]) => TraversableOnce[U]): Dataset[U] = {
+  def flatMapGroup[U : Encoder](f: (K, Iterator[V]) => TraversableOnce[U]): Dataset[U] = {
     new Dataset[U](
       sqlContext,
       MapGroups(
@@ -108,8 +121,25 @@ class GroupedDataset[K, T] private[sql](
         logicalPlan))
   }
 
-  def flatMap[U](f: FlatMapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
-    flatMap((key, data) => f.call(key, data.asJava).asScala)(encoder)
+  /**
+   * Applies the given function to each group of data.  For each unique group, the function will
+   * be passed the group key and an iterator that contains all of the elements in the group. The
+   * function can return an iterator containing elements of an arbitrary type which will be returned
+   * as a new [[Dataset]].
+   *
+   * This function does not support partial aggregation, and as a result requires shuffling all
+   * the data in the [[Dataset]]. If an application intends to perform an aggregation over each
+   * key, it is best to use the reduce function or an [[Aggregator]].
+   *
+   * Internally, the implementation will spill to disk if any given group is too large to fit into
+   * memory.  However, users must take care to avoid materializing the whole iterator for a group
+   * (for example, by calling `toList`) unless they are sure that this is possible given the memory
+   * constraints of their cluster.
+   *
+   * @since 1.6.0
+   */
+  def flatMapGroup[U](f: FlatMapGroupFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
+    flatMapGroup((key, data) => f.call(key, data.asJava).asScala)(encoder)
   }
 
   /**
@@ -117,32 +147,62 @@ class GroupedDataset[K, T] private[sql](
    * be passed the group key and an iterator that contains all of the elements in the group. The
    * function can return an element of arbitrary type which will be returned as a new [[Dataset]].
    *
+   * This function does not support partial aggregation, and as a result requires shuffling all
+   * the data in the [[Dataset]]. If an application intends to perform an aggregation over each
+   * key, it is best to use the reduce function or an [[Aggregator]].
+   *
    * Internally, the implementation will spill to disk if any given group is too large to fit into
    * memory.  However, users must take care to avoid materializing the whole iterator for a group
    * (for example, by calling `toList`) unless they are sure that this is possible given the memory
    * constraints of their cluster.
+   *
+   * @since 1.6.0
    */
-  def map[U : Encoder](f: (K, Iterator[T]) => U): Dataset[U] = {
-    val func = (key: K, it: Iterator[T]) => Iterator(f(key, it))
-    flatMap(func)
+  def mapGroup[U : Encoder](f: (K, Iterator[V]) => U): Dataset[U] = {
+    val func = (key: K, it: Iterator[V]) => Iterator(f(key, it))
+    flatMapGroup(func)
   }
 
-  def map[U](f: MapGroupFunction[K, T, U], encoder: Encoder[U]): Dataset[U] = {
-    map((key, data) => f.call(key, data.asJava))(encoder)
+  /**
+   * Applies the given function to each group of data.  For each unique group, the function will
+   * be passed the group key and an iterator that contains all of the elements in the group. The
+   * function can return an element of arbitrary type which will be returned as a new [[Dataset]].
+   *
+   * This function does not support partial aggregation, and as a result requires shuffling all
+   * the data in the [[Dataset]]. If an application intends to perform an aggregation over each
+   * key, it is best to use the reduce function or an [[Aggregator]].
+   *
+   * Internally, the implementation will spill to disk if any given group is too large to fit into
+   * memory.  However, users must take care to avoid materializing the whole iterator for a group
+   * (for example, by calling `toList`) unless they are sure that this is possible given the memory
+   * constraints of their cluster.
+   *
+   * @since 1.6.0
+   */
+  def mapGroup[U](f: MapGroupFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
+    mapGroup((key, data) => f.call(key, data.asJava))(encoder)
   }
 
   /**
    * Reduces the elements of each group of data using the specified binary function.
    * The given function must be commutative and associative or the result may be non-deterministic.
+   *
+   * @since 1.6.0
    */
-  def reduce(f: (T, T) => T): Dataset[(K, T)] = {
-    val func = (key: K, it: Iterator[T]) => Iterator(key -> it.reduce(f))
+  def reduce(f: (V, V) => V): Dataset[(K, V)] = {
+    val func = (key: K, it: Iterator[V]) => Iterator((key, it.reduce(f)))
 
     implicit val resultEncoder = ExpressionEncoder.tuple(unresolvedKEncoder, unresolvedTEncoder)
-    flatMap(func)
+    flatMapGroup(func)
   }
 
-  def reduce(f: ReduceFunction[T]): Dataset[(K, T)] = {
+  /**
+   * Reduces the elements of each group of data using the specified binary function.
+   * The given function must be commutative and associative or the result may be non-deterministic.
+   *
+   * @since 1.6.0
+   */
+  def reduce(f: ReduceFunction[V]): Dataset[(K, V)] = {
     reduce(f.call _)
   }
 
@@ -185,41 +245,51 @@ class GroupedDataset[K, T] private[sql](
   /**
    * Computes the given aggregation, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing this aggregation over all elements in the group.
+   *
+   * @since 1.6.0
    */
-  def agg[U1](col1: TypedColumn[T, U1]): Dataset[(K, U1)] =
+  def agg[U1](col1: TypedColumn[V, U1]): Dataset[(K, U1)] =
     aggUntyped(col1).asInstanceOf[Dataset[(K, U1)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
+   *
+   * @since 1.6.0
    */
-  def agg[U1, U2](col1: TypedColumn[T, U1], col2: TypedColumn[T, U2]): Dataset[(K, U1, U2)] =
+  def agg[U1, U2](col1: TypedColumn[V, U1], col2: TypedColumn[V, U2]): Dataset[(K, U1, U2)] =
     aggUntyped(col1, col2).asInstanceOf[Dataset[(K, U1, U2)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
+   *
+   * @since 1.6.0
    */
   def agg[U1, U2, U3](
-      col1: TypedColumn[T, U1],
-      col2: TypedColumn[T, U2],
-      col3: TypedColumn[T, U3]): Dataset[(K, U1, U2, U3)] =
+      col1: TypedColumn[V, U1],
+      col2: TypedColumn[V, U2],
+      col3: TypedColumn[V, U3]): Dataset[(K, U1, U2, U3)] =
     aggUntyped(col1, col2, col3).asInstanceOf[Dataset[(K, U1, U2, U3)]]
 
   /**
    * Computes the given aggregations, returning a [[Dataset]] of tuples for each unique key
    * and the result of computing these aggregations over all elements in the group.
+   *
+   * @since 1.6.0
    */
   def agg[U1, U2, U3, U4](
-      col1: TypedColumn[T, U1],
-      col2: TypedColumn[T, U2],
-      col3: TypedColumn[T, U3],
-      col4: TypedColumn[T, U4]): Dataset[(K, U1, U2, U3, U4)] =
+      col1: TypedColumn[V, U1],
+      col2: TypedColumn[V, U2],
+      col3: TypedColumn[V, U3],
+      col4: TypedColumn[V, U4]): Dataset[(K, U1, U2, U3, U4)] =
     aggUntyped(col1, col2, col3, col4).asInstanceOf[Dataset[(K, U1, U2, U3, U4)]]
 
   /**
    * Returns a [[Dataset]] that contains a tuple with each key and the number of items present
    * for that key.
+   *
+   * @since 1.6.0
    */
   def count(): Dataset[(K, Long)] = agg(functions.count("*").as(ExpressionEncoder[Long]))
 
@@ -228,10 +298,12 @@ class GroupedDataset[K, T] private[sql](
    * be passed the grouping key and 2 iterators containing all elements in the group from
    * [[Dataset]] `this` and `other`.  The function can return an iterator containing elements of an
    * arbitrary type which will be returned as a new [[Dataset]].
+   *
+   * @since 1.6.0
    */
   def cogroup[U, R : Encoder](
       other: GroupedDataset[K, U])(
-      f: (K, Iterator[T], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
+      f: (K, Iterator[V], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
     implicit def uEnc: Encoder[U] = other.unresolvedTEncoder
     new Dataset[R](
       sqlContext,
@@ -243,9 +315,17 @@ class GroupedDataset[K, T] private[sql](
         other.logicalPlan))
   }
 
+  /**
+   * Applies the given function to each cogrouped data.  For each unique group, the function will
+   * be passed the grouping key and 2 iterators containing all elements in the group from
+   * [[Dataset]] `this` and `other`.  The function can return an iterator containing elements of an
+   * arbitrary type which will be returned as a new [[Dataset]].
+   *
+   * @since 1.6.0
+   */
   def cogroup[U, R](
       other: GroupedDataset[K, U],
-      f: CoGroupFunction[K, T, U, R],
+      f: CoGroupFunction[K, V, U, R],
       encoder: Encoder[R]): Dataset[R] = {
     cogroup(other)((key, left, right) => f.call(key, left.asJava, right.asJava).asScala)(encoder)
   }
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index f32374b4c04d..cf335efdd23b 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -170,7 +170,7 @@ public Integer call(String v) throws Exception {
       }
     }, Encoders.INT());
 
-    Dataset<String> mapped = grouped.map(new MapGroupFunction<Integer, String, String>() {
+    Dataset<String> mapped = grouped.mapGroup(new MapGroupFunction<Integer, String, String>() {
       @Override
       public String call(Integer key, Iterator<String> values) throws Exception {
         StringBuilder sb = new StringBuilder(key.toString());
@@ -183,7 +183,7 @@ public String call(Integer key, Iterator<String> values) throws Exception {
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
 
-    Dataset<String> flatMapped = grouped.flatMap(
+    Dataset<String> flatMapped = grouped.flatMapGroup(
       new FlatMapGroupFunction<Integer, String, String>() {
         @Override
         public Iterable<String> call(Integer key, Iterator<String> values) throws Exception {
@@ -247,9 +247,9 @@ public void testGroupByColumn() {
     List<String> data = Arrays.asList("a", "foo", "bar");
     Dataset<String> ds = context.createDataset(data, Encoders.STRING());
     GroupedDataset<Integer, String> grouped =
-      ds.groupBy(length(col("value"))).asKey(Encoders.INT());
+      ds.groupBy(length(col("value"))).keyAs(Encoders.INT());
 
-    Dataset<String> mapped = grouped.map(
+    Dataset<String> mapped = grouped.mapGroup(
       new MapGroupFunction<Integer, String, String>() {
         @Override
         public String call(Integer key, Iterator<String> data) throws Exception {
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
index 63b00975e4eb..d387710357be 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -86,7 +86,7 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, map") {
     val ds = Seq(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).toDS()
     val grouped = ds.groupBy(_ % 2)
-    val agged = grouped.map { case (g, iter) =>
+    val agged = grouped.mapGroup { case (g, iter) =>
       val name = if (g == 0) "even" else "odd"
       (name, iter.size)
     }
@@ -99,7 +99,7 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, flatMap") {
     val ds = Seq("a", "b", "c", "xyz", "hello").toDS()
     val grouped = ds.groupBy(_.length)
-    val agged = grouped.flatMap { case (g, iter) => Iterator(g.toString, iter.mkString) }
+    val agged = grouped.flatMapGroup { case (g, iter) => Iterator(g.toString, iter.mkString) }
 
     checkAnswer(
       agged,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 89d964aa3e46..9da02550b39c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -224,7 +224,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
-    val agged = grouped.map { case (g, iter) => (g._1, iter.map(_._2).sum) }
+    val agged = grouped.mapGroup { case (g, iter) => (g._1, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -234,7 +234,9 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, flatMap") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
-    val agged = grouped.flatMap { case (g, iter) => Iterator(g._1, iter.map(_._2).sum.toString) }
+    val agged = grouped.flatMapGroup { case (g, iter) =>
+      Iterator(g._1, iter.map(_._2).sum.toString)
+    }
 
     checkAnswer(
       agged,
@@ -253,7 +255,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy columns, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1")
-    val agged = grouped.map { case (g, iter) => (g.getString(0), iter.map(_._2).sum) }
+    val agged = grouped.mapGroup { case (g, iter) => (g.getString(0), iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -262,8 +264,8 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
   test("groupBy columns asKey, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
-    val grouped = ds.groupBy($"_1").asKey[String]
-    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
+    val grouped = ds.groupBy($"_1").keyAs[String]
+    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -272,8 +274,8 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
   test("groupBy columns asKey tuple, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
-    val grouped = ds.groupBy($"_1", lit(1)).asKey[(String, Int)]
-    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
+    val grouped = ds.groupBy($"_1", lit(1)).keyAs[(String, Int)]
+    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -282,8 +284,8 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
   test("groupBy columns asKey class, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
-    val grouped = ds.groupBy($"_1".as("a"), lit(1).as("b")).asKey[ClassData]
-    val agged = grouped.map { case (g, iter) => (g, iter.map(_._2).sum) }
+    val grouped = ds.groupBy($"_1".as("a"), lit(1).as("b")).keyAs[ClassData]
+    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,

From 426004a9c9a864f90494d08601e6974709091a56 Mon Sep 17 00:00:00 2001
From: Liang-Chi Hsieh <viirya@appier.com>
Date: Sun, 22 Nov 2015 10:36:47 -0800
Subject: [PATCH 842/896] [SPARK-11908][SQL] Add NullType support to RowEncoder

JIRA: https://issues.apache.org/jira/browse/SPARK-11908

We should add NullType support to RowEncoder.

Author: Liang-Chi Hsieh <viirya@appier.com>

Closes #9891 from viirya/rowencoder-nulltype.
---
 .../org/apache/spark/sql/catalyst/encoders/RowEncoder.scala  | 5 +++--
 .../org/apache/spark/sql/catalyst/expressions/objects.scala  | 3 +++
 .../apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala | 3 +++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index 4cda4824acdc..fa553e7c5324 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -48,7 +48,7 @@ object RowEncoder {
   private def extractorsFor(
       inputObject: Expression,
       inputType: DataType): Expression = inputType match {
-    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+    case NullType | BooleanType | ByteType | ShortType | IntegerType | LongType |
          FloatType | DoubleType | BinaryType => inputObject
 
     case udt: UserDefinedType[_] =>
@@ -143,6 +143,7 @@ object RowEncoder {
     case _: MapType => ObjectType(classOf[scala.collection.Map[_, _]])
     case _: StructType => ObjectType(classOf[Row])
     case udt: UserDefinedType[_] => ObjectType(udt.userClass)
+    case _: NullType => ObjectType(classOf[java.lang.Object])
   }
 
   private def constructorFor(schema: StructType): Expression = {
@@ -158,7 +159,7 @@ object RowEncoder {
   }
 
   private def constructorFor(input: Expression): Expression = input.dataType match {
-    case BooleanType | ByteType | ShortType | IntegerType | LongType |
+    case NullType | BooleanType | ByteType | ShortType | IntegerType | LongType |
          FloatType | DoubleType | BinaryType => input
 
     case udt: UserDefinedType[_] =>
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index ef7399e0196a..82317d338516 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -369,6 +369,9 @@ case class MapObjects(
   private lazy val completeFunction = function(loopAttribute)
 
   private def itemAccessorMethod(dataType: DataType): String => String = dataType match {
+    case NullType =>
+      val nullTypeClassName = NullType.getClass.getName + ".MODULE$"
+      (i: String) => s".get($i, $nullTypeClassName)"
     case IntegerType => (i: String) => s".getInt($i)"
     case LongType => (i: String) => s".getLong($i)"
     case FloatType => (i: String) => s".getFloat($i)"
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
index 46c6e0d98d34..0ea51ece4bc5 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/RowEncoderSuite.scala
@@ -80,11 +80,13 @@ class RowEncoderSuite extends SparkFunSuite {
   private val structOfString = new StructType().add("str", StringType)
   private val structOfUDT = new StructType().add("udt", new ExamplePointUDT, false)
   private val arrayOfString = ArrayType(StringType)
+  private val arrayOfNull = ArrayType(NullType)
   private val mapOfString = MapType(StringType, StringType)
   private val arrayOfUDT = ArrayType(new ExamplePointUDT, false)
 
   encodeDecodeTest(
     new StructType()
+      .add("null", NullType)
       .add("boolean", BooleanType)
       .add("byte", ByteType)
       .add("short", ShortType)
@@ -101,6 +103,7 @@ class RowEncoderSuite extends SparkFunSuite {
 
   encodeDecodeTest(
     new StructType()
+      .add("arrayOfNull", arrayOfNull)
       .add("arrayOfString", arrayOfString)
       .add("arrayOfArrayOfString", ArrayType(arrayOfString))
       .add("arrayOfArrayOfInt", ArrayType(ArrayType(IntegerType)))

From fe89c1817d668e46adf70d0896c42c22a547c76a Mon Sep 17 00:00:00 2001
From: Xiangrui Meng <meng@databricks.com>
Date: Sun, 22 Nov 2015 21:45:46 -0800
Subject: [PATCH 843/896] [SPARK-11895][ML] rename and refactor DatasetExample
 under mllib/examples

We used the name `Dataset` to refer to `SchemaRDD` in 1.2 in ML pipelines and created this example file. Since `Dataset` has a new meaning in Spark 1.6, we should rename it to avoid confusion. This PR also removes support for dense format to simplify the example code.

cc: yinxusen

Author: Xiangrui Meng <meng@databricks.com>

Closes #9873 from mengxr/SPARK-11895.
---
 .../DataFrameExample.scala}                   | 71 +++++++------------
 1 file changed, 26 insertions(+), 45 deletions(-)
 rename examples/src/main/scala/org/apache/spark/examples/{mllib/DatasetExample.scala => ml/DataFrameExample.scala} (51%)

diff --git a/examples/src/main/scala/org/apache/spark/examples/mllib/DatasetExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/DataFrameExample.scala
similarity index 51%
rename from examples/src/main/scala/org/apache/spark/examples/mllib/DatasetExample.scala
rename to examples/src/main/scala/org/apache/spark/examples/ml/DataFrameExample.scala
index dc13f82488af..424f00158c2f 100644
--- a/examples/src/main/scala/org/apache/spark/examples/mllib/DatasetExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/DataFrameExample.scala
@@ -16,7 +16,7 @@
  */
 
 // scalastyle:off println
-package org.apache.spark.examples.mllib
+package org.apache.spark.examples.ml
 
 import java.io.File
 
@@ -24,25 +24,22 @@ import com.google.common.io.Files
 import scopt.OptionParser
 
 import org.apache.spark.{SparkConf, SparkContext}
+import org.apache.spark.examples.mllib.AbstractParams
 import org.apache.spark.mllib.linalg.Vector
-import org.apache.spark.mllib.regression.LabeledPoint
 import org.apache.spark.mllib.stat.MultivariateOnlineSummarizer
-import org.apache.spark.mllib.util.MLUtils
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{Row, SQLContext, DataFrame}
+import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 
 /**
- * An example of how to use [[org.apache.spark.sql.DataFrame]] as a Dataset for ML. Run with
+ * An example of how to use [[org.apache.spark.sql.DataFrame]] for ML. Run with
  * {{{
- * ./bin/run-example org.apache.spark.examples.mllib.DatasetExample [options]
+ * ./bin/run-example ml.DataFrameExample [options]
  * }}}
  * If you use it as a template to create your own app, please use `spark-submit` to submit your app.
  */
-object DatasetExample {
+object DataFrameExample {
 
-  case class Params(
-      input: String = "data/mllib/sample_libsvm_data.txt",
-      dataFormat: String = "libsvm") extends AbstractParams[Params]
+  case class Params(input: String = "data/mllib/sample_libsvm_data.txt")
+    extends AbstractParams[Params]
 
   def main(args: Array[String]) {
     val defaultParams = Params()
@@ -52,9 +49,6 @@ object DatasetExample {
       opt[String]("input")
         .text(s"input path to dataset")
         .action((x, c) => c.copy(input = x))
-      opt[String]("dataFormat")
-        .text("data format: libsvm (default), dense (deprecated in Spark v1.1)")
-        .action((x, c) => c.copy(input = x))
       checkConfig { params =>
         success
       }
@@ -69,55 +63,42 @@ object DatasetExample {
 
   def run(params: Params) {
 
-    val conf = new SparkConf().setAppName(s"DatasetExample with $params")
+    val conf = new SparkConf().setAppName(s"DataFrameExample with $params")
     val sc = new SparkContext(conf)
     val sqlContext = new SQLContext(sc)
-    import sqlContext.implicits._  // for implicit conversions
 
     // Load input data
-    val origData: RDD[LabeledPoint] = params.dataFormat match {
-      case "dense" => MLUtils.loadLabeledPoints(sc, params.input)
-      case "libsvm" => MLUtils.loadLibSVMFile(sc, params.input)
-    }
-    println(s"Loaded ${origData.count()} instances from file: ${params.input}")
-
-    // Convert input data to DataFrame explicitly.
-    val df: DataFrame = origData.toDF()
-    println(s"Inferred schema:\n${df.schema.prettyJson}")
-    println(s"Converted to DataFrame with ${df.count()} records")
-
-    // Select columns
-    val labelsDf: DataFrame = df.select("label")
-    val labels: RDD[Double] = labelsDf.map { case Row(v: Double) => v }
-    val numLabels = labels.count()
-    val meanLabel = labels.fold(0.0)(_ + _) / numLabels
-    println(s"Selected label column with average value $meanLabel")
-
-    val featuresDf: DataFrame = df.select("features")
-    val features: RDD[Vector] = featuresDf.map { case Row(v: Vector) => v }
+    println(s"Loading LIBSVM file with UDT from ${params.input}.")
+    val df: DataFrame = sqlContext.read.format("libsvm").load(params.input).cache()
+    println("Schema from LIBSVM:")
+    df.printSchema()
+    println(s"Loaded training data as a DataFrame with ${df.count()} records.")
+
+    // Show statistical summary of labels.
+    val labelSummary = df.describe("label")
+    labelSummary.show()
+
+    // Convert features column to an RDD of vectors.
+    val features = df.select("features").map { case Row(v: Vector) => v }
     val featureSummary = features.aggregate(new MultivariateOnlineSummarizer())(
       (summary, feat) => summary.add(feat),
       (sum1, sum2) => sum1.merge(sum2))
     println(s"Selected features column with average values:\n ${featureSummary.mean.toString}")
 
+    // Save the records in a parquet file.
     val tmpDir = Files.createTempDir()
     tmpDir.deleteOnExit()
     val outputDir = new File(tmpDir, "dataset").toString
     println(s"Saving to $outputDir as Parquet file.")
     df.write.parquet(outputDir)
 
+    // Load the records back.
     println(s"Loading Parquet file with UDT from $outputDir.")
-    val newDataset = sqlContext.read.parquet(outputDir)
-
-    println(s"Schema from Parquet: ${newDataset.schema.prettyJson}")
-    val newFeatures = newDataset.select("features").map { case Row(v: Vector) => v }
-    val newFeaturesSummary = newFeatures.aggregate(new MultivariateOnlineSummarizer())(
-      (summary, feat) => summary.add(feat),
-      (sum1, sum2) => sum1.merge(sum2))
-    println(s"Selected features column with average values:\n ${newFeaturesSummary.mean.toString}")
+    val newDF = sqlContext.read.parquet(outputDir)
+    println(s"Schema from Parquet:")
+    newDF.printSchema()
 
     sc.stop()
   }
-
 }
 // scalastyle:on println

From a6fda0bfc16a13b28b1cecc96f1ff91363089144 Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Sun, 22 Nov 2015 21:48:48 -0800
Subject: [PATCH 844/896] [SPARK-6791][ML] Add read/write for CrossValidator
 and Evaluators

I believe this works for general estimators within CrossValidator, including compound estimators.  (See the complex unit test.)

Added read/write for all 3 Evaluators as well.

CC: mengxr yanboliang

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9848 from jkbradley/cv-io.
---
 .../scala/org/apache/spark/ml/Pipeline.scala  |  38 +--
 .../BinaryClassificationEvaluator.scala       |  11 +-
 .../MulticlassClassificationEvaluator.scala   |  12 +-
 .../ml/evaluation/RegressionEvaluator.scala   |  11 +-
 .../apache/spark/ml/recommendation/ALS.scala  |  14 +-
 .../spark/ml/tuning/CrossValidator.scala      | 229 +++++++++++++++++-
 .../org/apache/spark/ml/util/ReadWrite.scala  |  48 ++--
 .../org/apache/spark/ml/PipelineSuite.scala   |   4 +-
 .../BinaryClassificationEvaluatorSuite.scala  |  13 +-
 ...lticlassClassificationEvaluatorSuite.scala |  13 +-
 .../evaluation/RegressionEvaluatorSuite.scala |  12 +-
 .../spark/ml/tuning/CrossValidatorSuite.scala | 202 ++++++++++++++-
 12 files changed, 522 insertions(+), 85 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
index 6f15b37abcb3..4b2b3f8489fd 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/Pipeline.scala
@@ -34,7 +34,6 @@ import org.apache.spark.ml.util.MLWriter
 import org.apache.spark.ml.util._
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.types.StructType
-import org.apache.spark.util.Utils
 
 /**
  * :: DeveloperApi ::
@@ -232,20 +231,9 @@ object Pipeline extends MLReadable[Pipeline] {
         stages: Array[PipelineStage],
         sc: SparkContext,
         path: String): Unit = {
-      // Copied and edited from DefaultParamsWriter.saveMetadata
-      // TODO: modify DefaultParamsWriter.saveMetadata to avoid duplication
-      val uid = instance.uid
-      val cls = instance.getClass.getName
       val stageUids = stages.map(_.uid)
       val jsonParams = List("stageUids" -> parse(compact(render(stageUids.toSeq))))
-      val metadata = ("class" -> cls) ~
-        ("timestamp" -> System.currentTimeMillis()) ~
-        ("sparkVersion" -> sc.version) ~
-        ("uid" -> uid) ~
-        ("paramMap" -> jsonParams)
-      val metadataPath = new Path(path, "metadata").toString
-      val metadataJson = compact(render(metadata))
-      sc.parallelize(Seq(metadataJson), 1).saveAsTextFile(metadataPath)
+      DefaultParamsWriter.saveMetadata(instance, path, sc, paramMap = Some(jsonParams))
 
       // Save stages
       val stagesDir = new Path(path, "stages").toString
@@ -266,30 +254,10 @@ object Pipeline extends MLReadable[Pipeline] {
 
       implicit val format = DefaultFormats
       val stagesDir = new Path(path, "stages").toString
-      val stageUids: Array[String] = metadata.params match {
-        case JObject(pairs) =>
-          if (pairs.length != 1) {
-            // Should not happen unless file is corrupted or we have a bug.
-            throw new RuntimeException(
-              s"Pipeline read expected 1 Param (stageUids), but found ${pairs.length}.")
-          }
-          pairs.head match {
-            case ("stageUids", jsonValue) =>
-              jsonValue.extract[Seq[String]].toArray
-            case (paramName, jsonValue) =>
-              // Should not happen unless file is corrupted or we have a bug.
-              throw new RuntimeException(s"Pipeline read encountered unexpected Param $paramName" +
-                s" in metadata: ${metadata.metadataStr}")
-          }
-        case _ =>
-          throw new IllegalArgumentException(
-            s"Cannot recognize JSON metadata: ${metadata.metadataStr}.")
-      }
+      val stageUids: Array[String] = (metadata.params \ "stageUids").extract[Seq[String]].toArray
       val stages: Array[PipelineStage] = stageUids.zipWithIndex.map { case (stageUid, idx) =>
         val stagePath = SharedReadWrite.getStagePath(stageUid, idx, stageUids.length, stagesDir)
-        val stageMetadata = DefaultParamsReader.loadMetadata(stagePath, sc)
-        val cls = Utils.classForName(stageMetadata.className)
-        cls.getMethod("read").invoke(null).asInstanceOf[MLReader[PipelineStage]].load(stagePath)
+        DefaultParamsReader.loadParamsInstance[PipelineStage](stagePath, sc)
       }
       (metadata.uid, stages)
     }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
index 1fe3abaca81c..bfb70963b151 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluator.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.evaluation
 import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param._
 import org.apache.spark.ml.param.shared._
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util.{DefaultParamsReadable, DefaultParamsWritable, Identifiable, SchemaUtils}
 import org.apache.spark.mllib.evaluation.BinaryClassificationMetrics
 import org.apache.spark.mllib.linalg.{Vector, VectorUDT}
 import org.apache.spark.sql.{DataFrame, Row}
@@ -33,7 +33,7 @@ import org.apache.spark.sql.types.DoubleType
 @Since("1.2.0")
 @Experimental
 class BinaryClassificationEvaluator @Since("1.4.0") (@Since("1.4.0") override val uid: String)
-  extends Evaluator with HasRawPredictionCol with HasLabelCol {
+  extends Evaluator with HasRawPredictionCol with HasLabelCol with DefaultParamsWritable {
 
   @Since("1.2.0")
   def this() = this(Identifiable.randomUID("binEval"))
@@ -105,3 +105,10 @@ class BinaryClassificationEvaluator @Since("1.4.0") (@Since("1.4.0") override va
   @Since("1.4.1")
   override def copy(extra: ParamMap): BinaryClassificationEvaluator = defaultCopy(extra)
 }
+
+@Since("1.6.0")
+object BinaryClassificationEvaluator extends DefaultParamsReadable[BinaryClassificationEvaluator] {
+
+  @Since("1.6.0")
+  override def load(path: String): BinaryClassificationEvaluator = super.load(path)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
index df5f04ca5a8d..c44db0ec595e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluator.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.evaluation
 import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param.{ParamMap, ParamValidators, Param}
 import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
-import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
+import org.apache.spark.ml.util.{DefaultParamsReadable, DefaultParamsWritable, SchemaUtils, Identifiable}
 import org.apache.spark.mllib.evaluation.MulticlassMetrics
 import org.apache.spark.sql.{Row, DataFrame}
 import org.apache.spark.sql.types.DoubleType
@@ -32,7 +32,7 @@ import org.apache.spark.sql.types.DoubleType
 @Since("1.5.0")
 @Experimental
 class MulticlassClassificationEvaluator @Since("1.5.0") (@Since("1.5.0") override val uid: String)
-  extends Evaluator with HasPredictionCol with HasLabelCol {
+  extends Evaluator with HasPredictionCol with HasLabelCol with DefaultParamsWritable {
 
   @Since("1.5.0")
   def this() = this(Identifiable.randomUID("mcEval"))
@@ -101,3 +101,11 @@ class MulticlassClassificationEvaluator @Since("1.5.0") (@Since("1.5.0") overrid
   @Since("1.5.0")
   override def copy(extra: ParamMap): MulticlassClassificationEvaluator = defaultCopy(extra)
 }
+
+@Since("1.6.0")
+object MulticlassClassificationEvaluator
+  extends DefaultParamsReadable[MulticlassClassificationEvaluator] {
+
+  @Since("1.6.0")
+  override def load(path: String): MulticlassClassificationEvaluator = super.load(path)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
index ba012f444d3e..daaa174a086e 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/evaluation/RegressionEvaluator.scala
@@ -20,7 +20,7 @@ package org.apache.spark.ml.evaluation
 import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml.param.{Param, ParamMap, ParamValidators}
 import org.apache.spark.ml.param.shared.{HasLabelCol, HasPredictionCol}
-import org.apache.spark.ml.util.{Identifiable, SchemaUtils}
+import org.apache.spark.ml.util.{DefaultParamsReadable, DefaultParamsWritable, Identifiable, SchemaUtils}
 import org.apache.spark.mllib.evaluation.RegressionMetrics
 import org.apache.spark.sql.{DataFrame, Row}
 import org.apache.spark.sql.functions._
@@ -33,7 +33,7 @@ import org.apache.spark.sql.types.{DoubleType, FloatType}
 @Since("1.4.0")
 @Experimental
 final class RegressionEvaluator @Since("1.4.0") (@Since("1.4.0") override val uid: String)
-  extends Evaluator with HasPredictionCol with HasLabelCol {
+  extends Evaluator with HasPredictionCol with HasLabelCol with DefaultParamsWritable {
 
   @Since("1.4.0")
   def this() = this(Identifiable.randomUID("regEval"))
@@ -104,3 +104,10 @@ final class RegressionEvaluator @Since("1.4.0") (@Since("1.4.0") override val ui
   @Since("1.5.0")
   override def copy(extra: ParamMap): RegressionEvaluator = defaultCopy(extra)
 }
+
+@Since("1.6.0")
+object RegressionEvaluator extends DefaultParamsReadable[RegressionEvaluator] {
+
+  @Since("1.6.0")
+  override def load(path: String): RegressionEvaluator = super.load(path)
+}
diff --git a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
index 4d35177ad9b0..b798aa1fab76 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/recommendation/ALS.scala
@@ -27,9 +27,8 @@ import scala.util.hashing.byteswap64
 
 import com.github.fommil.netlib.BLAS.{getInstance => blas}
 import org.apache.hadoop.fs.{FileSystem, Path}
-import org.json4s.{DefaultFormats, JValue}
+import org.json4s.DefaultFormats
 import org.json4s.JsonDSL._
-import org.json4s.jackson.JsonMethods._
 
 import org.apache.spark.{Logging, Partitioner}
 import org.apache.spark.annotation.{Since, DeveloperApi, Experimental}
@@ -240,7 +239,7 @@ object ALSModel extends MLReadable[ALSModel] {
   private[ALSModel] class ALSModelWriter(instance: ALSModel) extends MLWriter {
 
     override protected def saveImpl(path: String): Unit = {
-      val extraMetadata = render("rank" -> instance.rank)
+      val extraMetadata = "rank" -> instance.rank
       DefaultParamsWriter.saveMetadata(instance, path, sc, Some(extraMetadata))
       val userPath = new Path(path, "userFactors").toString
       instance.userFactors.write.format("parquet").save(userPath)
@@ -257,14 +256,7 @@ object ALSModel extends MLReadable[ALSModel] {
     override def load(path: String): ALSModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
       implicit val format = DefaultFormats
-      val rank: Int = metadata.extraMetadata match {
-        case Some(m: JValue) =>
-          (m \ "rank").extract[Int]
-        case None =>
-          throw new RuntimeException(s"ALSModel loader could not read rank from JSON metadata:" +
-            s" ${metadata.metadataStr}")
-      }
-
+      val rank = (metadata.metadata \ "rank").extract[Int]
       val userPath = new Path(path, "userFactors").toString
       val userFactors = sqlContext.read.format("parquet").load(userPath)
       val itemPath = new Path(path, "itemFactors").toString
diff --git a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
index 77d9948ed86b..83a904837426 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/tuning/CrossValidator.scala
@@ -18,17 +18,24 @@
 package org.apache.spark.ml.tuning
 
 import com.github.fommil.netlib.F2jBLAS
+import org.apache.hadoop.fs.Path
+import org.json4s.{JObject, DefaultFormats}
+import org.json4s.jackson.JsonMethods._
 
-import org.apache.spark.Logging
-import org.apache.spark.annotation.Experimental
+import org.apache.spark.ml.classification.OneVsRestParams
+import org.apache.spark.ml.feature.RFormulaModel
+import org.apache.spark.{SparkContext, Logging}
+import org.apache.spark.annotation.{Experimental, Since}
 import org.apache.spark.ml._
 import org.apache.spark.ml.evaluation.Evaluator
 import org.apache.spark.ml.param._
-import org.apache.spark.ml.util.Identifiable
+import org.apache.spark.ml.util._
+import org.apache.spark.ml.util.DefaultParamsReader.Metadata
 import org.apache.spark.mllib.util.MLUtils
 import org.apache.spark.sql.DataFrame
 import org.apache.spark.sql.types.StructType
 
+
 /**
  * Params for [[CrossValidator]] and [[CrossValidatorModel]].
  */
@@ -53,7 +60,7 @@ private[ml] trait CrossValidatorParams extends ValidatorParams {
  */
 @Experimental
 class CrossValidator(override val uid: String) extends Estimator[CrossValidatorModel]
-  with CrossValidatorParams with Logging {
+  with CrossValidatorParams with MLWritable with Logging {
 
   def this() = this(Identifiable.randomUID("cv"))
 
@@ -131,6 +138,166 @@ class CrossValidator(override val uid: String) extends Estimator[CrossValidatorM
     }
     copied
   }
+
+  // Currently, this only works if all [[Param]]s in [[estimatorParamMaps]] are simple types.
+  // E.g., this may fail if a [[Param]] is an instance of an [[Estimator]].
+  // However, this case should be unusual.
+  @Since("1.6.0")
+  override def write: MLWriter = new CrossValidator.CrossValidatorWriter(this)
+}
+
+@Since("1.6.0")
+object CrossValidator extends MLReadable[CrossValidator] {
+
+  @Since("1.6.0")
+  override def read: MLReader[CrossValidator] = new CrossValidatorReader
+
+  @Since("1.6.0")
+  override def load(path: String): CrossValidator = super.load(path)
+
+  private[CrossValidator] class CrossValidatorWriter(instance: CrossValidator) extends MLWriter {
+
+    SharedReadWrite.validateParams(instance)
+
+    override protected def saveImpl(path: String): Unit =
+      SharedReadWrite.saveImpl(path, instance, sc)
+  }
+
+  private class CrossValidatorReader extends MLReader[CrossValidator] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[CrossValidator].getName
+
+    override def load(path: String): CrossValidator = {
+      val (metadata, estimator, evaluator, estimatorParamMaps, numFolds) =
+        SharedReadWrite.load(path, sc, className)
+      new CrossValidator(metadata.uid)
+        .setEstimator(estimator)
+        .setEvaluator(evaluator)
+        .setEstimatorParamMaps(estimatorParamMaps)
+        .setNumFolds(numFolds)
+    }
+  }
+
+  private object CrossValidatorReader {
+    /**
+     * Examine the given estimator (which may be a compound estimator) and extract a mapping
+     * from UIDs to corresponding [[Params]] instances.
+     */
+    def getUidMap(instance: Params): Map[String, Params] = {
+      val uidList = getUidMapImpl(instance)
+      val uidMap = uidList.toMap
+      if (uidList.size != uidMap.size) {
+        throw new RuntimeException("CrossValidator.load found a compound estimator with stages" +
+          s" with duplicate UIDs.  List of UIDs: ${uidList.map(_._1).mkString(", ")}")
+      }
+      uidMap
+    }
+
+    def getUidMapImpl(instance: Params): List[(String, Params)] = {
+      val subStages: Array[Params] = instance match {
+        case p: Pipeline => p.getStages.asInstanceOf[Array[Params]]
+        case pm: PipelineModel => pm.stages.asInstanceOf[Array[Params]]
+        case v: ValidatorParams => Array(v.getEstimator, v.getEvaluator)
+        case ovr: OneVsRestParams =>
+          // TODO: SPARK-11892: This case may require special handling.
+          throw new UnsupportedOperationException("CrossValidator write will fail because it" +
+            " cannot yet handle an estimator containing type: ${ovr.getClass.getName}")
+        case rform: RFormulaModel =>
+          // TODO: SPARK-11891: This case may require special handling.
+          throw new UnsupportedOperationException("CrossValidator write will fail because it" +
+            " cannot yet handle an estimator containing an RFormulaModel")
+        case _: Params => Array()
+      }
+      val subStageMaps = subStages.map(getUidMapImpl).foldLeft(List.empty[(String, Params)])(_ ++ _)
+      List((instance.uid, instance)) ++ subStageMaps
+    }
+  }
+
+  private[tuning] object SharedReadWrite {
+
+    /**
+     * Check that [[CrossValidator.evaluator]] and [[CrossValidator.estimator]] are Writable.
+     * This does not check [[CrossValidator.estimatorParamMaps]].
+     */
+    def validateParams(instance: ValidatorParams): Unit = {
+      def checkElement(elem: Params, name: String): Unit = elem match {
+        case stage: MLWritable => // good
+        case other =>
+          throw new UnsupportedOperationException("CrossValidator write will fail " +
+            s" because it contains $name which does not implement Writable." +
+            s" Non-Writable $name: ${other.uid} of type ${other.getClass}")
+      }
+      checkElement(instance.getEvaluator, "evaluator")
+      checkElement(instance.getEstimator, "estimator")
+      // Check to make sure all Params apply to this estimator.  Throw an error if any do not.
+      // Extraneous Params would cause problems when loading the estimatorParamMaps.
+      val uidToInstance: Map[String, Params] = CrossValidatorReader.getUidMap(instance)
+      instance.getEstimatorParamMaps.foreach { case pMap: ParamMap =>
+        pMap.toSeq.foreach { case ParamPair(p, v) =>
+          require(uidToInstance.contains(p.parent), s"CrossValidator save requires all Params in" +
+            s" estimatorParamMaps to apply to this CrossValidator, its Estimator, or its" +
+            s" Evaluator.  An extraneous Param was found: $p")
+        }
+      }
+    }
+
+    private[tuning] def saveImpl(
+        path: String,
+        instance: CrossValidatorParams,
+        sc: SparkContext,
+        extraMetadata: Option[JObject] = None): Unit = {
+      import org.json4s.JsonDSL._
+
+      val estimatorParamMapsJson = compact(render(
+        instance.getEstimatorParamMaps.map { case paramMap =>
+          paramMap.toSeq.map { case ParamPair(p, v) =>
+            Map("parent" -> p.parent, "name" -> p.name, "value" -> p.jsonEncode(v))
+          }
+        }.toSeq
+      ))
+      val jsonParams = List(
+        "numFolds" -> parse(instance.numFolds.jsonEncode(instance.getNumFolds)),
+        "estimatorParamMaps" -> parse(estimatorParamMapsJson)
+      )
+      DefaultParamsWriter.saveMetadata(instance, path, sc, extraMetadata, Some(jsonParams))
+
+      val evaluatorPath = new Path(path, "evaluator").toString
+      instance.getEvaluator.asInstanceOf[MLWritable].save(evaluatorPath)
+      val estimatorPath = new Path(path, "estimator").toString
+      instance.getEstimator.asInstanceOf[MLWritable].save(estimatorPath)
+    }
+
+    private[tuning] def load[M <: Model[M]](
+        path: String,
+        sc: SparkContext,
+        expectedClassName: String): (Metadata, Estimator[M], Evaluator, Array[ParamMap], Int) = {
+
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, expectedClassName)
+
+      implicit val format = DefaultFormats
+      val evaluatorPath = new Path(path, "evaluator").toString
+      val evaluator = DefaultParamsReader.loadParamsInstance[Evaluator](evaluatorPath, sc)
+      val estimatorPath = new Path(path, "estimator").toString
+      val estimator = DefaultParamsReader.loadParamsInstance[Estimator[M]](estimatorPath, sc)
+
+      val uidToParams = Map(evaluator.uid -> evaluator) ++ CrossValidatorReader.getUidMap(estimator)
+
+      val numFolds = (metadata.params \ "numFolds").extract[Int]
+      val estimatorParamMaps: Array[ParamMap] =
+        (metadata.params \ "estimatorParamMaps").extract[Seq[Seq[Map[String, String]]]].map {
+          pMap =>
+            val paramPairs = pMap.map { case pInfo: Map[String, String] =>
+              val est = uidToParams(pInfo("parent"))
+              val param = est.getParam(pInfo("name"))
+              val value = param.jsonDecode(pInfo("value"))
+              param -> value
+            }
+            ParamMap(paramPairs: _*)
+        }.toArray
+      (metadata, estimator, evaluator, estimatorParamMaps, numFolds)
+    }
+  }
 }
 
 /**
@@ -139,14 +306,14 @@ class CrossValidator(override val uid: String) extends Estimator[CrossValidatorM
  *
  * @param bestModel The best model selected from k-fold cross validation.
  * @param avgMetrics Average cross-validation metrics for each paramMap in
- *                   [[estimatorParamMaps]], in the corresponding order.
+ *                   [[CrossValidator.estimatorParamMaps]], in the corresponding order.
  */
 @Experimental
 class CrossValidatorModel private[ml] (
     override val uid: String,
     val bestModel: Model[_],
     val avgMetrics: Array[Double])
-  extends Model[CrossValidatorModel] with CrossValidatorParams {
+  extends Model[CrossValidatorModel] with CrossValidatorParams with MLWritable {
 
   override def validateParams(): Unit = {
     bestModel.validateParams()
@@ -168,4 +335,54 @@ class CrossValidatorModel private[ml] (
       avgMetrics.clone())
     copyValues(copied, extra).setParent(parent)
   }
+
+  @Since("1.6.0")
+  override def write: MLWriter = new CrossValidatorModel.CrossValidatorModelWriter(this)
+}
+
+@Since("1.6.0")
+object CrossValidatorModel extends MLReadable[CrossValidatorModel] {
+
+  import CrossValidator.SharedReadWrite
+
+  @Since("1.6.0")
+  override def read: MLReader[CrossValidatorModel] = new CrossValidatorModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): CrossValidatorModel = super.load(path)
+
+  private[CrossValidatorModel]
+  class CrossValidatorModelWriter(instance: CrossValidatorModel) extends MLWriter {
+
+    SharedReadWrite.validateParams(instance)
+
+    override protected def saveImpl(path: String): Unit = {
+      import org.json4s.JsonDSL._
+      val extraMetadata = "avgMetrics" -> instance.avgMetrics.toSeq
+      SharedReadWrite.saveImpl(path, instance, sc, Some(extraMetadata))
+      val bestModelPath = new Path(path, "bestModel").toString
+      instance.bestModel.asInstanceOf[MLWritable].save(bestModelPath)
+    }
+  }
+
+  private class CrossValidatorModelReader extends MLReader[CrossValidatorModel] {
+
+    /** Checked against metadata when loading model */
+    private val className = classOf[CrossValidatorModel].getName
+
+    override def load(path: String): CrossValidatorModel = {
+      implicit val format = DefaultFormats
+
+      val (metadata, estimator, evaluator, estimatorParamMaps, numFolds) =
+        SharedReadWrite.load(path, sc, className)
+      val bestModelPath = new Path(path, "bestModel").toString
+      val bestModel = DefaultParamsReader.loadParamsInstance[Model[_]](bestModelPath, sc)
+      val avgMetrics = (metadata.metadata \ "avgMetrics").extract[Seq[Double]].toArray
+      val cv = new CrossValidatorModel(metadata.uid, bestModel, avgMetrics)
+      cv.set(cv.estimator, estimator)
+        .set(cv.evaluator, evaluator)
+        .set(cv.estimatorParamMaps, estimatorParamMaps)
+        .set(cv.numFolds, numFolds)
+    }
+  }
 }
diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
index ff9322dba122..8484b1f80106 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/ReadWrite.scala
@@ -202,25 +202,36 @@ private[ml] object DefaultParamsWriter {
    *  - timestamp
    *  - sparkVersion
    *  - uid
-   *  - paramMap: These must be encodable using [[org.apache.spark.ml.param.Param.jsonEncode()]].
+   *  - paramMap
+   *  - (optionally, extra metadata)
+   * @param extraMetadata  Extra metadata to be saved at same level as uid, paramMap, etc.
+   * @param paramMap  If given, this is saved in the "paramMap" field.
+   *                  Otherwise, all [[org.apache.spark.ml.param.Param]]s are encoded using
+   *                  [[org.apache.spark.ml.param.Param.jsonEncode()]].
    */
   def saveMetadata(
       instance: Params,
       path: String,
       sc: SparkContext,
-      extraMetadata: Option[JValue] = None): Unit = {
+      extraMetadata: Option[JObject] = None,
+      paramMap: Option[JValue] = None): Unit = {
     val uid = instance.uid
     val cls = instance.getClass.getName
     val params = instance.extractParamMap().toSeq.asInstanceOf[Seq[ParamPair[Any]]]
-    val jsonParams = params.map { case ParamPair(p, v) =>
+    val jsonParams = paramMap.getOrElse(render(params.map { case ParamPair(p, v) =>
       p.name -> parse(p.jsonEncode(v))
-    }.toList
-    val metadata = ("class" -> cls) ~
+    }.toList))
+    val basicMetadata = ("class" -> cls) ~
       ("timestamp" -> System.currentTimeMillis()) ~
       ("sparkVersion" -> sc.version) ~
       ("uid" -> uid) ~
-      ("paramMap" -> jsonParams) ~
-      ("extraMetadata" -> extraMetadata)
+      ("paramMap" -> jsonParams)
+    val metadata = extraMetadata match {
+      case Some(jObject) =>
+        basicMetadata ~ jObject
+      case None =>
+        basicMetadata
+    }
     val metadataPath = new Path(path, "metadata").toString
     val metadataJson = compact(render(metadata))
     sc.parallelize(Seq(metadataJson), 1).saveAsTextFile(metadataPath)
@@ -251,8 +262,8 @@ private[ml] object DefaultParamsReader {
   /**
    * All info from metadata file.
    * @param params  paramMap, as a [[JValue]]
-   * @param extraMetadata  Extra metadata saved by [[DefaultParamsWriter.saveMetadata()]]
-   * @param metadataStr  Full metadata file String (for debugging)
+   * @param metadata  All metadata, including the other fields
+   * @param metadataJson  Full metadata file String (for debugging)
    */
   case class Metadata(
       className: String,
@@ -260,8 +271,8 @@ private[ml] object DefaultParamsReader {
       timestamp: Long,
       sparkVersion: String,
       params: JValue,
-      extraMetadata: Option[JValue],
-      metadataStr: String)
+      metadata: JValue,
+      metadataJson: String)
 
   /**
    * Load metadata from file.
@@ -279,13 +290,12 @@ private[ml] object DefaultParamsReader {
     val timestamp = (metadata \ "timestamp").extract[Long]
     val sparkVersion = (metadata \ "sparkVersion").extract[String]
     val params = metadata \ "paramMap"
-    val extraMetadata = (metadata \ "extraMetadata").extract[Option[JValue]]
     if (expectedClassName.nonEmpty) {
       require(className == expectedClassName, s"Error loading metadata: Expected class name" +
         s" $expectedClassName but found class name $className")
     }
 
-    Metadata(className, uid, timestamp, sparkVersion, params, extraMetadata, metadataStr)
+    Metadata(className, uid, timestamp, sparkVersion, params, metadata, metadataStr)
   }
 
   /**
@@ -303,7 +313,17 @@ private[ml] object DefaultParamsReader {
         }
       case _ =>
         throw new IllegalArgumentException(
-          s"Cannot recognize JSON metadata: ${metadata.metadataStr}.")
+          s"Cannot recognize JSON metadata: ${metadata.metadataJson}.")
     }
   }
+
+  /**
+   * Load a [[Params]] instance from the given path, and return it.
+   * This assumes the instance implements [[MLReadable]].
+   */
+  def loadParamsInstance[T](path: String, sc: SparkContext): T = {
+    val metadata = DefaultParamsReader.loadMetadata(path, sc)
+    val cls = Utils.classForName(metadata.className)
+    cls.getMethod("read").invoke(null).asInstanceOf[MLReader[T]].load(path)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
index 12aba6bc6dbe..8c8676745636 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/PipelineSuite.scala
@@ -17,11 +17,9 @@
 
 package org.apache.spark.ml
 
-import java.io.File
-
 import scala.collection.JavaConverters._
 
-import org.apache.hadoop.fs.{FileSystem, Path}
+import org.apache.hadoop.fs.Path
 import org.mockito.Matchers.{any, eq => meq}
 import org.mockito.Mockito.when
 import org.scalatest.mock.MockitoSugar.mock
diff --git a/mllib/src/test/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluatorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluatorSuite.scala
index def869fe6677..a535c1218ecf 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluatorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/evaluation/BinaryClassificationEvaluatorSuite.scala
@@ -19,10 +19,21 @@ package org.apache.spark.ml.evaluation
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
+import org.apache.spark.mllib.util.MLlibTestSparkContext
 
-class BinaryClassificationEvaluatorSuite extends SparkFunSuite {
+class BinaryClassificationEvaluatorSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new BinaryClassificationEvaluator)
   }
+
+  test("read/write") {
+    val evaluator = new BinaryClassificationEvaluator()
+      .setRawPredictionCol("myRawPrediction")
+      .setLabelCol("myLabel")
+      .setMetricName("areaUnderPR")
+    testDefaultReadWrite(evaluator)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluatorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluatorSuite.scala
index 6d8412b0b370..7ee65975d22f 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluatorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/evaluation/MulticlassClassificationEvaluatorSuite.scala
@@ -19,10 +19,21 @@ package org.apache.spark.ml.evaluation
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
+import org.apache.spark.ml.util.DefaultReadWriteTest
+import org.apache.spark.mllib.util.MLlibTestSparkContext
 
-class MulticlassClassificationEvaluatorSuite extends SparkFunSuite {
+class MulticlassClassificationEvaluatorSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new MulticlassClassificationEvaluator)
   }
+
+  test("read/write") {
+    val evaluator = new MulticlassClassificationEvaluator()
+      .setPredictionCol("myPrediction")
+      .setLabelCol("myLabel")
+      .setMetricName("recall")
+    testDefaultReadWrite(evaluator)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/evaluation/RegressionEvaluatorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/evaluation/RegressionEvaluatorSuite.scala
index aa722da32393..60886bf77d2f 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/evaluation/RegressionEvaluatorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/evaluation/RegressionEvaluatorSuite.scala
@@ -20,10 +20,12 @@ package org.apache.spark.ml.evaluation
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.ml.param.ParamsSuite
 import org.apache.spark.ml.regression.LinearRegression
+import org.apache.spark.ml.util.DefaultReadWriteTest
 import org.apache.spark.mllib.util.{LinearDataGenerator, MLlibTestSparkContext}
 import org.apache.spark.mllib.util.TestingUtils._
 
-class RegressionEvaluatorSuite extends SparkFunSuite with MLlibTestSparkContext {
+class RegressionEvaluatorSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   test("params") {
     ParamsSuite.checkParams(new RegressionEvaluator)
@@ -73,4 +75,12 @@ class RegressionEvaluatorSuite extends SparkFunSuite with MLlibTestSparkContext
     evaluator.setMetricName("mae")
     assert(evaluator.evaluate(predictions) ~== 0.08036075 absTol 0.001)
   }
+
+  test("read/write") {
+    val evaluator = new RegressionEvaluator()
+      .setPredictionCol("myPrediction")
+      .setLabelCol("myLabel")
+      .setMetricName("r2")
+    testDefaultReadWrite(evaluator)
+  }
 }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
index cbe09292a033..dd6366050c02 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/tuning/CrossValidatorSuite.scala
@@ -18,19 +18,22 @@
 package org.apache.spark.ml.tuning
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.ml.util.MLTestingUtils
-import org.apache.spark.ml.{Estimator, Model}
-import org.apache.spark.ml.classification.LogisticRegression
+import org.apache.spark.ml.feature.HashingTF
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
+import org.apache.spark.ml.{Pipeline, Estimator, Model}
+import org.apache.spark.ml.classification.{LogisticRegressionModel, LogisticRegression}
 import org.apache.spark.ml.evaluation.{BinaryClassificationEvaluator, Evaluator, RegressionEvaluator}
-import org.apache.spark.ml.param.ParamMap
+import org.apache.spark.ml.param.{ParamPair, ParamMap}
 import org.apache.spark.ml.param.shared.HasInputCol
 import org.apache.spark.ml.regression.LinearRegression
 import org.apache.spark.mllib.classification.LogisticRegressionSuite.generateLogisticInput
+import org.apache.spark.mllib.linalg.Vectors
 import org.apache.spark.mllib.util.{LinearDataGenerator, MLlibTestSparkContext}
 import org.apache.spark.sql.{DataFrame, SQLContext}
 import org.apache.spark.sql.types.StructType
 
-class CrossValidatorSuite extends SparkFunSuite with MLlibTestSparkContext {
+class CrossValidatorSuite
+  extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   @transient var dataset: DataFrame = _
 
@@ -95,7 +98,7 @@ class CrossValidatorSuite extends SparkFunSuite with MLlibTestSparkContext {
   }
 
   test("validateParams should check estimatorParamMaps") {
-    import CrossValidatorSuite._
+    import CrossValidatorSuite.{MyEstimator, MyEvaluator}
 
     val est = new MyEstimator("est")
     val eval = new MyEvaluator
@@ -116,9 +119,194 @@ class CrossValidatorSuite extends SparkFunSuite with MLlibTestSparkContext {
       cv.validateParams()
     }
   }
+
+  test("read/write: CrossValidator with simple estimator") {
+    val lr = new LogisticRegression().setMaxIter(3)
+    val evaluator = new BinaryClassificationEvaluator()
+      .setMetricName("areaUnderPR")  // not default metric
+    val paramMaps = new ParamGridBuilder()
+        .addGrid(lr.regParam, Array(0.1, 0.2))
+        .build()
+    val cv = new CrossValidator()
+      .setEstimator(lr)
+      .setEvaluator(evaluator)
+      .setNumFolds(20)
+      .setEstimatorParamMaps(paramMaps)
+
+    val cv2 = testDefaultReadWrite(cv, testParams = false)
+
+    assert(cv.uid === cv2.uid)
+    assert(cv.getNumFolds === cv2.getNumFolds)
+
+    assert(cv2.getEvaluator.isInstanceOf[BinaryClassificationEvaluator])
+    val evaluator2 = cv2.getEvaluator.asInstanceOf[BinaryClassificationEvaluator]
+    assert(evaluator.uid === evaluator2.uid)
+    assert(evaluator.getMetricName === evaluator2.getMetricName)
+
+    cv2.getEstimator match {
+      case lr2: LogisticRegression =>
+        assert(lr.uid === lr2.uid)
+        assert(lr.getMaxIter === lr2.getMaxIter)
+      case other =>
+        throw new AssertionError(s"Loaded CrossValidator expected estimator of type" +
+          s" LogisticRegression but found ${other.getClass.getName}")
+    }
+
+    CrossValidatorSuite.compareParamMaps(cv.getEstimatorParamMaps, cv2.getEstimatorParamMaps)
+  }
+
+  test("read/write: CrossValidator with complex estimator") {
+    // workflow: CrossValidator[Pipeline[HashingTF, CrossValidator[LogisticRegression]]]
+    val lrEvaluator = new BinaryClassificationEvaluator()
+      .setMetricName("areaUnderPR")  // not default metric
+
+    val lr = new LogisticRegression().setMaxIter(3)
+    val lrParamMaps = new ParamGridBuilder()
+      .addGrid(lr.regParam, Array(0.1, 0.2))
+      .build()
+    val lrcv = new CrossValidator()
+      .setEstimator(lr)
+      .setEvaluator(lrEvaluator)
+      .setEstimatorParamMaps(lrParamMaps)
+
+    val hashingTF = new HashingTF()
+    val pipeline = new Pipeline().setStages(Array(hashingTF, lrcv))
+    val paramMaps = new ParamGridBuilder()
+      .addGrid(hashingTF.numFeatures, Array(10, 20))
+      .addGrid(lr.elasticNetParam, Array(0.0, 1.0))
+      .build()
+    val evaluator = new BinaryClassificationEvaluator()
+
+    val cv = new CrossValidator()
+      .setEstimator(pipeline)
+      .setEvaluator(evaluator)
+      .setNumFolds(20)
+      .setEstimatorParamMaps(paramMaps)
+
+    val cv2 = testDefaultReadWrite(cv, testParams = false)
+
+    assert(cv.uid === cv2.uid)
+    assert(cv.getNumFolds === cv2.getNumFolds)
+
+    assert(cv2.getEvaluator.isInstanceOf[BinaryClassificationEvaluator])
+    assert(cv.getEvaluator.uid === cv2.getEvaluator.uid)
+
+    CrossValidatorSuite.compareParamMaps(cv.getEstimatorParamMaps, cv2.getEstimatorParamMaps)
+
+    cv2.getEstimator match {
+      case pipeline2: Pipeline =>
+        assert(pipeline.uid === pipeline2.uid)
+        pipeline2.getStages match {
+          case Array(hashingTF2: HashingTF, lrcv2: CrossValidator) =>
+            assert(hashingTF.uid === hashingTF2.uid)
+            lrcv2.getEstimator match {
+              case lr2: LogisticRegression =>
+                assert(lr.uid === lr2.uid)
+                assert(lr.getMaxIter === lr2.getMaxIter)
+              case other =>
+                throw new AssertionError(s"Loaded internal CrossValidator expected to be" +
+                  s" LogisticRegression but found type ${other.getClass.getName}")
+            }
+            assert(lrcv.uid === lrcv2.uid)
+            assert(lrcv2.getEvaluator.isInstanceOf[BinaryClassificationEvaluator])
+            assert(lrEvaluator.uid === lrcv2.getEvaluator.uid)
+            CrossValidatorSuite.compareParamMaps(lrParamMaps, lrcv2.getEstimatorParamMaps)
+          case other =>
+            throw new AssertionError("Loaded Pipeline expected stages (HashingTF, CrossValidator)" +
+              " but found: " + other.map(_.getClass.getName).mkString(", "))
+        }
+      case other =>
+        throw new AssertionError(s"Loaded CrossValidator expected estimator of type" +
+          s" CrossValidator but found ${other.getClass.getName}")
+    }
+  }
+
+  test("read/write: CrossValidator fails for extraneous Param") {
+    val lr = new LogisticRegression()
+    val lr2 = new LogisticRegression()
+    val evaluator = new BinaryClassificationEvaluator()
+    val paramMaps = new ParamGridBuilder()
+      .addGrid(lr.regParam, Array(0.1, 0.2))
+      .addGrid(lr2.regParam, Array(0.1, 0.2))
+      .build()
+    val cv = new CrossValidator()
+      .setEstimator(lr)
+      .setEvaluator(evaluator)
+      .setEstimatorParamMaps(paramMaps)
+    withClue("CrossValidator.write failed to catch extraneous Param error") {
+      intercept[IllegalArgumentException] {
+        cv.write
+      }
+    }
+  }
+
+  test("read/write: CrossValidatorModel") {
+    val lr = new LogisticRegression()
+      .setThreshold(0.6)
+    val lrModel = new LogisticRegressionModel(lr.uid, Vectors.dense(1.0, 2.0), 1.2)
+      .setThreshold(0.6)
+    val evaluator = new BinaryClassificationEvaluator()
+      .setMetricName("areaUnderPR")  // not default metric
+    val paramMaps = new ParamGridBuilder()
+        .addGrid(lr.regParam, Array(0.1, 0.2))
+        .build()
+    val cv = new CrossValidatorModel("cvUid", lrModel, Array(0.3, 0.6))
+    cv.set(cv.estimator, lr)
+      .set(cv.evaluator, evaluator)
+      .set(cv.numFolds, 20)
+      .set(cv.estimatorParamMaps, paramMaps)
+
+    val cv2 = testDefaultReadWrite(cv, testParams = false)
+
+    assert(cv.uid === cv2.uid)
+    assert(cv.getNumFolds === cv2.getNumFolds)
+
+    assert(cv2.getEvaluator.isInstanceOf[BinaryClassificationEvaluator])
+    val evaluator2 = cv2.getEvaluator.asInstanceOf[BinaryClassificationEvaluator]
+    assert(evaluator.uid === evaluator2.uid)
+    assert(evaluator.getMetricName === evaluator2.getMetricName)
+
+    cv2.getEstimator match {
+      case lr2: LogisticRegression =>
+        assert(lr.uid === lr2.uid)
+        assert(lr.getThreshold === lr2.getThreshold)
+      case other =>
+        throw new AssertionError(s"Loaded CrossValidator expected estimator of type" +
+          s" LogisticRegression but found ${other.getClass.getName}")
+    }
+
+    CrossValidatorSuite.compareParamMaps(cv.getEstimatorParamMaps, cv2.getEstimatorParamMaps)
+
+    cv2.bestModel match {
+      case lrModel2: LogisticRegressionModel =>
+        assert(lrModel.uid === lrModel2.uid)
+        assert(lrModel.getThreshold === lrModel2.getThreshold)
+        assert(lrModel.coefficients === lrModel2.coefficients)
+        assert(lrModel.intercept === lrModel2.intercept)
+      case other =>
+        throw new AssertionError(s"Loaded CrossValidator expected bestModel of type" +
+          s" LogisticRegressionModel but found ${other.getClass.getName}")
+    }
+    assert(cv.avgMetrics === cv2.avgMetrics)
+  }
 }
 
-object CrossValidatorSuite {
+object CrossValidatorSuite extends SparkFunSuite {
+
+  /**
+   * Assert sequences of estimatorParamMaps are identical.
+   * Params must be simple types comparable with `===`.
+   */
+  def compareParamMaps(pMaps: Array[ParamMap], pMaps2: Array[ParamMap]): Unit = {
+    assert(pMaps.length === pMaps2.length)
+    pMaps.zip(pMaps2).foreach { case (pMap, pMap2) =>
+      assert(pMap.size === pMap2.size)
+      pMap.toSeq.foreach { case ParamPair(p, v) =>
+        assert(pMap2.contains(p))
+        assert(pMap2(p) === v)
+      }
+    }
+  }
 
   abstract class MyModel extends Model[MyModel]
 

From fc4b792d287095d70379a51f117c225d8d857078 Mon Sep 17 00:00:00 2001
From: Timothy Hunter <timhunter@databricks.com>
Date: Sun, 22 Nov 2015 21:51:42 -0800
Subject: [PATCH 845/896] [SPARK-11835] Adds a sidebar menu to MLlib's
 documentation

This PR adds a sidebar menu when browsing the user guide of MLlib. It uses a YAML file to describe the structure of the documentation. It should be trivial to adapt this to the other projects.

![screen shot 2015-11-18 at 4 46 12 pm](https://cloud.githubusercontent.com/assets/7594753/11259591/a55173f4-8e17-11e5-9340-0aed79d66262.png)

Author: Timothy Hunter <timhunter@databricks.com>

Closes #9826 from thunterdb/spark-11835.
---
 docs/_data/menu-ml.yaml                 | 10 ++++
 docs/_data/menu-mllib.yaml              | 75 +++++++++++++++++++++++++
 docs/_includes/nav-left-wrapper-ml.html |  8 +++
 docs/_includes/nav-left.html            | 17 ++++++
 docs/_layouts/global.html               | 24 +++++---
 docs/css/main.css                       | 37 ++++++++++++
 6 files changed, 163 insertions(+), 8 deletions(-)
 create mode 100644 docs/_data/menu-ml.yaml
 create mode 100644 docs/_data/menu-mllib.yaml
 create mode 100644 docs/_includes/nav-left-wrapper-ml.html
 create mode 100644 docs/_includes/nav-left.html

diff --git a/docs/_data/menu-ml.yaml b/docs/_data/menu-ml.yaml
new file mode 100644
index 000000000000..dff3d33bf4ed
--- /dev/null
+++ b/docs/_data/menu-ml.yaml
@@ -0,0 +1,10 @@
+- text: Feature extraction, transformation, and selection
+  url: ml-features.html
+- text: Decision trees for classification and regression
+  url: ml-decision-tree.html
+- text: Ensembles
+  url: ml-ensembles.html
+- text: Linear methods with elastic-net regularization
+  url: ml-linear-methods.html
+- text: Multilayer perceptron classifier
+  url: ml-ann.html
diff --git a/docs/_data/menu-mllib.yaml b/docs/_data/menu-mllib.yaml
new file mode 100644
index 000000000000..12d22abd5282
--- /dev/null
+++ b/docs/_data/menu-mllib.yaml
@@ -0,0 +1,75 @@
+- text: Data types
+  url: mllib-data-types.html
+- text: Basic statistics
+  url: mllib-statistics.html
+  subitems:
+    - text: Summary statistics
+      url: mllib-statistics.html#summary-statistics
+    - text: Correlations
+      url: mllib-statistics.html#correlations
+    - text: Stratified sampling
+      url: mllib-statistics.html#stratified-sampling
+    - text: Hypothesis testing
+      url: mllib-statistics.html#hypothesis-testing
+    - text: Random data generation
+      url: mllib-statistics.html#random-data-generation
+- text: Classification and regression
+  url: mllib-classification-regression.html
+  subitems:
+    - text: Linear models (SVMs, logistic regression, linear regression)
+      url: mllib-linear-methods.html
+    - text: Naive Bayes
+      url: mllib-naive-bayes.html
+    - text: decision trees
+      url: mllib-decision-tree.html
+    - text: ensembles of trees (Random Forests and Gradient-Boosted Trees)
+      url: mllib-ensembles.html
+    - text: isotonic regression
+      url: mllib-isotonic-regression.html
+- text: Collaborative filtering
+  url: mllib-collaborative-filtering.html
+  subitems:
+    - text: alternating least squares (ALS)
+      url: mllib-collaborative-filtering.html#collaborative-filtering
+- text: Clustering
+  url: mllib-clustering.html
+  subitems:
+    - text: k-means
+      url: mllib-clustering.html#k-means
+    - text: Gaussian mixture
+      url: mllib-clustering.html#gaussian-mixture
+    - text: power iteration clustering (PIC)
+      url: mllib-clustering.html#power-iteration-clustering-pic
+    - text: latent Dirichlet allocation (LDA)
+      url: mllib-clustering.html#latent-dirichlet-allocation-lda
+    - text: streaming k-means
+      url: mllib-clustering.html#streaming-k-means
+- text: Dimensionality reduction
+  url: mllib-dimensionality-reduction.html
+  subitems:
+    - text: singular value decomposition (SVD)
+      url: mllib-dimensionality-reduction.html#singular-value-decomposition-svd
+    - text: principal component analysis (PCA)
+      url: mllib-dimensionality-reduction.html#principal-component-analysis-pca
+- text: Feature extraction and transformation
+  url: mllib-feature-extraction.html
+- text: Frequent pattern mining
+  url: mllib-frequent-pattern-mining.html
+  subitems:
+    - text: FP-growth
+      url: mllib-frequent-pattern-mining.html#fp-growth
+    - text: association rules
+      url: mllib-frequent-pattern-mining.html#association-rules
+    - text: PrefixSpan
+      url: mllib-frequent-pattern-mining.html#prefix-span
+- text: Evaluation metrics
+  url: mllib-evaluation-metrics.html
+- text: PMML model export
+  url: mllib-pmml-model-export.html
+- text: Optimization (developer)
+  url: mllib-optimization.html
+  subitems:
+    - text: stochastic gradient descent
+      url: mllib-optimization.html#stochastic-gradient-descent-sgd
+    - text: limited-memory BFGS (L-BFGS)
+      url: mllib-optimization.html#limited-memory-bfgs-l-bfgs
diff --git a/docs/_includes/nav-left-wrapper-ml.html b/docs/_includes/nav-left-wrapper-ml.html
new file mode 100644
index 000000000000..0103e890cc21
--- /dev/null
+++ b/docs/_includes/nav-left-wrapper-ml.html
@@ -0,0 +1,8 @@
+<div class="left-menu-wrapper">
+    <div class="left-menu">
+        <h3>spark.ml package</h3>
+        {% include nav-left.html nav=include.nav-ml %}
+        <h3>spark.mllib package</h3>
+        {% include nav-left.html nav=include.nav-mllib %}
+    </div>
+</div>
\ No newline at end of file
diff --git a/docs/_includes/nav-left.html b/docs/_includes/nav-left.html
new file mode 100644
index 000000000000..73176f413255
--- /dev/null
+++ b/docs/_includes/nav-left.html
@@ -0,0 +1,17 @@
+{% assign navurl = page.url | remove: 'index.html' %}
+<ul>
+{% for item in include.nav %}
+    <li>
+        <a href="{{ item.url }}">
+            {% if navurl contains item.url %}
+                <b>{{ item.text }}</b>
+            {% else %}
+                {{ item.text }}
+            {% endif %}
+        </a>
+    </li>
+    {% if item.subitems and navurl contains item.url %}
+        {% include nav-left.html nav=item.subitems %}
+    {% endif %}
+{% endfor %}
+</ul>
diff --git a/docs/_layouts/global.html b/docs/_layouts/global.html
index 467ff7a03fb7..1b09e2221e17 100755
--- a/docs/_layouts/global.html
+++ b/docs/_layouts/global.html
@@ -124,16 +124,24 @@
             </div>
         </div>
 
-        <div class="container" id="content">
-          {% if page.displayTitle %}
-            <h1 class="title">{{ page.displayTitle }}</h1>
-          {% else %}
-            <h1 class="title">{{ page.title }}</h1>
-          {% endif %}
+        <div class="container-wrapper">
 
-          {{ content }}
+            {% if page.url contains "/ml" %}
+              {% include nav-left-wrapper-ml.html nav-mllib=site.data.menu-mllib nav-ml=site.data.menu-ml %}
+            {% endif %}
 
-        </div> <!-- /container -->
+
+            <div class="container" id="content">
+              {% if page.displayTitle %}
+                <h1 class="title">{{ page.displayTitle }}</h1>
+              {% else %}
+                <h1 class="title">{{ page.title }}</h1>
+              {% endif %}
+
+              {{ content }}
+
+            </div> <!-- /container -->
+        </div>
 
         <script src="js/vendor/jquery-1.8.0.min.js"></script>
         <script src="js/vendor/bootstrap.min.js"></script>
diff --git a/docs/css/main.css b/docs/css/main.css
index d770173be101..356b324d6303 100755
--- a/docs/css/main.css
+++ b/docs/css/main.css
@@ -39,8 +39,18 @@
   margin-left: 10px;
 }
 
+body .container-wrapper {
+  position: absolute;
+  width: 100%;
+  display: flex;
+}
+
 body #content {
+  position: relative;
+
   line-height: 1.6; /* Inspired by Github's wiki style */
+  background-color: white;
+  padding-left: 15px;
 }
 
 .title {
@@ -155,3 +165,30 @@ ul.nav li.dropdown ul.dropdown-menu li.dropdown-submenu ul.dropdown-menu {
  * AnchorJS (anchor links when hovering over headers)
  */
 a.anchorjs-link:hover { text-decoration: none; }
+
+
+/**
+ * The left navigation bar.
+ */
+.left-menu-wrapper {
+  position: absolute;
+  height: 100%;
+
+  width: 256px;
+  margin-top: -20px;
+  padding-top: 20px;
+  background-color: #F0F8FC;
+}
+
+.left-menu {
+  position: fixed;
+  max-width: 350px;
+
+  padding-right: 10px;
+  width: 256px;
+}
+
+.left-menu h3 {
+  margin-left: 10px;
+  line-height: 30px;
+}
\ No newline at end of file

From d9cf9c21fc6b1aa22e68d66760afd42c4e1c18b8 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Sun, 22 Nov 2015 21:56:07 -0800
Subject: [PATCH 846/896] [SPARK-11912][ML] ml.feature.PCA minor refactor

Like [SPARK-11852](https://issues.apache.org/jira/browse/SPARK-11852), ```k``` is params and we should save it under ```metadata/``` rather than both under ```data/``` and ```metadata/```. Refactor the constructor of ```ml.feature.PCAModel```  to take only ```pc``` but construct ```mllib.feature.PCAModel``` inside ```transform```.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9897 from yanboliang/spark-11912.
---
 .../org/apache/spark/ml/feature/PCA.scala     | 23 +++++++-------
 .../apache/spark/ml/feature/PCASuite.scala    | 31 ++++++++-----------
 2 files changed, 24 insertions(+), 30 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
index 32d7afee6e73..aa88cb03d23c 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/PCA.scala
@@ -73,7 +73,7 @@ class PCA (override val uid: String) extends Estimator[PCAModel] with PCAParams
     val input = dataset.select($(inputCol)).map { case Row(v: Vector) => v}
     val pca = new feature.PCA(k = $(k))
     val pcaModel = pca.fit(input)
-    copyValues(new PCAModel(uid, pcaModel).setParent(this))
+    copyValues(new PCAModel(uid, pcaModel.pc).setParent(this))
   }
 
   override def transformSchema(schema: StructType): StructType = {
@@ -99,18 +99,17 @@ object PCA extends DefaultParamsReadable[PCA] {
 /**
  * :: Experimental ::
  * Model fitted by [[PCA]].
+ *
+ * @param pc A principal components Matrix. Each column is one principal component.
  */
 @Experimental
 class PCAModel private[ml] (
     override val uid: String,
-    pcaModel: feature.PCAModel)
+    val pc: DenseMatrix)
   extends Model[PCAModel] with PCAParams with MLWritable {
 
   import PCAModel._
 
-  /** a principal components Matrix. Each column is one principal component. */
-  val pc: DenseMatrix = pcaModel.pc
-
   /** @group setParam */
   def setInputCol(value: String): this.type = set(inputCol, value)
 
@@ -124,6 +123,7 @@ class PCAModel private[ml] (
    */
   override def transform(dataset: DataFrame): DataFrame = {
     transformSchema(dataset.schema, logging = true)
+    val pcaModel = new feature.PCAModel($(k), pc)
     val pcaOp = udf { pcaModel.transform _ }
     dataset.withColumn($(outputCol), pcaOp(col($(inputCol))))
   }
@@ -139,7 +139,7 @@ class PCAModel private[ml] (
   }
 
   override def copy(extra: ParamMap): PCAModel = {
-    val copied = new PCAModel(uid, pcaModel)
+    val copied = new PCAModel(uid, pc)
     copyValues(copied, extra).setParent(parent)
   }
 
@@ -152,11 +152,11 @@ object PCAModel extends MLReadable[PCAModel] {
 
   private[PCAModel] class PCAModelWriter(instance: PCAModel) extends MLWriter {
 
-    private case class Data(k: Int, pc: DenseMatrix)
+    private case class Data(pc: DenseMatrix)
 
     override protected def saveImpl(path: String): Unit = {
       DefaultParamsWriter.saveMetadata(instance, path, sc)
-      val data = Data(instance.getK, instance.pc)
+      val data = Data(instance.pc)
       val dataPath = new Path(path, "data").toString
       sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
     }
@@ -169,11 +169,10 @@ object PCAModel extends MLReadable[PCAModel] {
     override def load(path: String): PCAModel = {
       val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
       val dataPath = new Path(path, "data").toString
-      val Row(k: Int, pc: DenseMatrix) = sqlContext.read.parquet(dataPath)
-        .select("k", "pc")
+      val Row(pc: DenseMatrix) = sqlContext.read.parquet(dataPath)
+        .select("pc")
         .head()
-      val oldModel = new feature.PCAModel(k, pc)
-      val model = new PCAModel(metadata.uid, oldModel)
+      val model = new PCAModel(metadata.uid, pc)
       DefaultParamsReader.getAndSetParams(model, metadata)
       model
     }
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
index 5a21cd20ceed..edab21e6c307 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/PCASuite.scala
@@ -32,7 +32,7 @@ class PCASuite extends SparkFunSuite with MLlibTestSparkContext with DefaultRead
   test("params") {
     ParamsSuite.checkParams(new PCA)
     val mat = Matrices.dense(2, 2, Array(0.0, 1.0, 2.0, 3.0)).asInstanceOf[DenseMatrix]
-    val model = new PCAModel("pca", new OldPCAModel(2, mat))
+    val model = new PCAModel("pca", mat)
     ParamsSuite.checkParams(model)
   }
 
@@ -66,23 +66,18 @@ class PCASuite extends SparkFunSuite with MLlibTestSparkContext with DefaultRead
     }
   }
 
-  test("read/write") {
+  test("PCA read/write") {
+    val t = new PCA()
+      .setInputCol("myInputCol")
+      .setOutputCol("myOutputCol")
+      .setK(3)
+    testDefaultReadWrite(t)
+  }
 
-    def checkModelData(model1: PCAModel, model2: PCAModel): Unit = {
-      assert(model1.pc === model2.pc)
-    }
-    val allParams: Map[String, Any] = Map(
-      "k" -> 3,
-      "inputCol" -> "features",
-      "outputCol" -> "pca_features"
-    )
-    val data = Seq(
-      (0.0, Vectors.sparse(5, Seq((1, 1.0), (3, 7.0)))),
-      (1.0, Vectors.dense(2.0, 0.0, 3.0, 4.0, 5.0)),
-      (2.0, Vectors.dense(4.0, 0.0, 0.0, 6.0, 7.0))
-    )
-    val df = sqlContext.createDataFrame(data).toDF("id", "features")
-    val pca = new PCA().setK(3)
-    testEstimatorAndModelReadWrite(pca, df, allParams, checkModelData)
+  test("PCAModel read/write") {
+    val instance = new PCAModel("myPCAModel",
+      Matrices.dense(2, 2, Array(0.0, 1.0, 2.0, 3.0)).asInstanceOf[DenseMatrix])
+    val newInstance = testDefaultReadWrite(instance)
+    assert(newInstance.pc === instance.pc)
   }
 }

From 4be360d4ee6cdb4d06306feca38ddef5212608cf Mon Sep 17 00:00:00 2001
From: BenFradet <benjamin.fradet@gmail.com>
Date: Sun, 22 Nov 2015 22:05:01 -0800
Subject: [PATCH 847/896] [SPARK-11902][ML] Unhandled case in
 VectorAssembler#transform

There is an unhandled case in the transform method of VectorAssembler if one of the input columns doesn't have one of the supported type DoubleType, NumericType, BooleanType or VectorUDT.

So, if you try to transform a column of StringType you get a cryptic "scala.MatchError: StringType".

This PR aims to fix this, throwing a SparkException when dealing with an unknown column type.

Author: BenFradet <benjamin.fradet@gmail.com>

Closes #9885 from BenFradet/SPARK-11902.
---
 .../org/apache/spark/ml/feature/VectorAssembler.scala |  2 ++
 .../spark/ml/feature/VectorAssemblerSuite.scala       | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
index 0feec0549852..801096fed27b 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/feature/VectorAssembler.scala
@@ -84,6 +84,8 @@ class VectorAssembler(override val uid: String)
             val numAttrs = group.numAttributes.getOrElse(first.getAs[Vector](index).size)
             Array.fill(numAttrs)(NumericAttribute.defaultAttr)
           }
+        case otherType =>
+          throw new SparkException(s"VectorAssembler does not support the $otherType type")
       }
     }
     val metadata = new AttributeGroup($(outputCol), attrs).toMetadata()
diff --git a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
index fb21ab6b9bf2..9c1c00f41ab1 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/feature/VectorAssemblerSuite.scala
@@ -69,6 +69,17 @@ class VectorAssemblerSuite
     }
   }
 
+  test("transform should throw an exception in case of unsupported type") {
+    val df = sqlContext.createDataFrame(Seq(("a", "b", "c"))).toDF("a", "b", "c")
+    val assembler = new VectorAssembler()
+      .setInputCols(Array("a", "b", "c"))
+      .setOutputCol("features")
+    val thrown = intercept[SparkException] {
+      assembler.transform(df)
+    }
+    assert(thrown.getMessage contains "VectorAssembler does not support the StringType type")
+  }
+
   test("ML attributes") {
     val browser = NominalAttribute.defaultAttr.withValues("chrome", "firefox", "safari")
     val hour = NumericAttribute.defaultAttr.withMin(0.0).withMax(24.0)

From 94ce65dfcbba1fe3a1fc9d8002c37d9cd1a11336 Mon Sep 17 00:00:00 2001
From: Xiu Guo <xguo27@gmail.com>
Date: Mon, 23 Nov 2015 08:53:40 -0800
Subject: [PATCH 848/896] [SPARK-11628][SQL] support column datatype of char(x)
 to recognize HiveChar

Can someone review my code to make sure I'm not missing anything? Thanks!

Author: Xiu Guo <xguo27@gmail.com>
Author: Xiu Guo <guoxi@us.ibm.com>

Closes #9612 from xguo27/SPARK-11628.
---
 .../sql/catalyst/util/DataTypeParser.scala    |  6 ++++-
 .../catalyst/util/DataTypeParserSuite.scala   |  8 ++++--
 .../spark/sql/sources/TableScanSuite.scala    |  5 ++++
 .../spark/sql/hive/HiveInspectors.scala       | 25 ++++++++++++++++---
 .../apache/spark/sql/hive/TableReader.scala   |  3 +++
 .../spark/sql/hive/client/HiveShim.scala      |  3 ++-
 6 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
index 2b83651f9086..515c071c283b 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DataTypeParser.scala
@@ -52,7 +52,8 @@ private[sql] trait DataTypeParser extends StandardTokenParsers {
     "(?i)decimal".r ^^^ DecimalType.USER_DEFAULT |
     "(?i)date".r ^^^ DateType |
     "(?i)timestamp".r ^^^ TimestampType |
-    varchar
+    varchar |
+    char
 
   protected lazy val fixedDecimalType: Parser[DataType] =
     ("(?i)decimal".r ~> "(" ~> numericLit) ~ ("," ~> numericLit <~ ")") ^^ {
@@ -60,6 +61,9 @@ private[sql] trait DataTypeParser extends StandardTokenParsers {
         DecimalType(precision.toInt, scale.toInt)
     }
 
+  protected lazy val char: Parser[DataType] =
+    "(?i)char".r ~> "(" ~> (numericLit <~ ")") ^^^ StringType
+
   protected lazy val varchar: Parser[DataType] =
     "(?i)varchar".r ~> "(" ~> (numericLit <~ ")") ^^^ StringType
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
index 1e3409a9db6e..bebf70896547 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/util/DataTypeParserSuite.scala
@@ -49,7 +49,9 @@ class DataTypeParserSuite extends SparkFunSuite {
   checkDataType("DATE", DateType)
   checkDataType("timestamp", TimestampType)
   checkDataType("string", StringType)
+  checkDataType("ChaR(5)", StringType)
   checkDataType("varchAr(20)", StringType)
+  checkDataType("cHaR(27)", StringType)
   checkDataType("BINARY", BinaryType)
 
   checkDataType("array<doublE>", ArrayType(DoubleType, true))
@@ -83,7 +85,8 @@ class DataTypeParserSuite extends SparkFunSuite {
       |struct<
       |  struct:struct<deciMal:DECimal, anotherDecimal:decimAL(5,2)>,
       |  MAP:Map<timestamp, varchar(10)>,
-      |  arrAy:Array<double>>
+      |  arrAy:Array<double>,
+      |  anotherArray:Array<char(9)>>
     """.stripMargin,
     StructType(
       StructField("struct",
@@ -91,7 +94,8 @@ class DataTypeParserSuite extends SparkFunSuite {
           StructField("deciMal", DecimalType.USER_DEFAULT, true) ::
           StructField("anotherDecimal", DecimalType(5, 2), true) :: Nil), true) ::
       StructField("MAP", MapType(TimestampType, StringType), true) ::
-      StructField("arrAy", ArrayType(DoubleType, true), true) :: Nil)
+      StructField("arrAy", ArrayType(DoubleType, true), true) ::
+      StructField("anotherArray", ArrayType(StringType, true), true) :: Nil)
   )
   // A column name can be a reserved word in our DDL parser and SqlParser.
   checkDataType(
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/sources/TableScanSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/sources/TableScanSuite.scala
index 12af8068c398..26c1ff520406 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/sources/TableScanSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/sources/TableScanSuite.scala
@@ -85,6 +85,7 @@ case class AllDataTypesScan(
         Date.valueOf("1970-01-01"),
         new Timestamp(20000 + i),
         s"varchar_$i",
+        s"char_$i",
         Seq(i, i + 1),
         Seq(Map(s"str_$i" -> Row(i.toLong))),
         Map(i -> i.toString),
@@ -115,6 +116,7 @@ class TableScanSuite extends DataSourceTest with SharedSQLContext {
       Date.valueOf("1970-01-01"),
       new Timestamp(20000 + i),
       s"varchar_$i",
+      s"char_$i",
       Seq(i, i + 1),
       Seq(Map(s"str_$i" -> Row(i.toLong))),
       Map(i -> i.toString),
@@ -154,6 +156,7 @@ class TableScanSuite extends DataSourceTest with SharedSQLContext {
         |dateField dAte,
         |timestampField tiMestamp,
         |varcharField varchaR(12),
+        |charField ChaR(18),
         |arrayFieldSimple Array<inT>,
         |arrayFieldComplex Array<Map<String, Struct<key:bigInt>>>,
         |mapFieldSimple MAP<iNt, StRing>,
@@ -207,6 +210,7 @@ class TableScanSuite extends DataSourceTest with SharedSQLContext {
       StructField("dateField", DateType, true) ::
       StructField("timestampField", TimestampType, true) ::
       StructField("varcharField", StringType, true) ::
+      StructField("charField", StringType, true) ::
       StructField("arrayFieldSimple", ArrayType(IntegerType), true) ::
       StructField("arrayFieldComplex",
         ArrayType(
@@ -248,6 +252,7 @@ class TableScanSuite extends DataSourceTest with SharedSQLContext {
           | dateField,
           | timestampField,
           | varcharField,
+          | charField,
           | arrayFieldSimple,
           | arrayFieldComplex,
           | mapFieldSimple,
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
index 36f0708f9da3..95b57d6ad124 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveInspectors.scala
@@ -19,7 +19,7 @@ package org.apache.spark.sql.hive
 
 import scala.collection.JavaConverters._
 
-import org.apache.hadoop.hive.common.`type`.{HiveDecimal, HiveVarchar}
+import org.apache.hadoop.hive.common.`type`.{HiveChar, HiveDecimal, HiveVarchar}
 import org.apache.hadoop.hive.serde2.objectinspector.primitive._
 import org.apache.hadoop.hive.serde2.objectinspector.{StructField => HiveStructField, _}
 import org.apache.hadoop.hive.serde2.typeinfo.{DecimalTypeInfo, TypeInfoFactory}
@@ -61,6 +61,7 @@ import org.apache.spark.unsafe.types.UTF8String
  * Primitive Type
  *   Java Boxed Primitives:
  *       org.apache.hadoop.hive.common.type.HiveVarchar
+ *       org.apache.hadoop.hive.common.type.HiveChar
  *       java.lang.String
  *       java.lang.Integer
  *       java.lang.Boolean
@@ -75,6 +76,7 @@ import org.apache.spark.unsafe.types.UTF8String
  *       java.sql.Timestamp
  *   Writables:
  *       org.apache.hadoop.hive.serde2.io.HiveVarcharWritable
+ *       org.apache.hadoop.hive.serde2.io.HiveCharWritable
  *       org.apache.hadoop.io.Text
  *       org.apache.hadoop.io.IntWritable
  *       org.apache.hadoop.hive.serde2.io.DoubleWritable
@@ -93,7 +95,8 @@ import org.apache.spark.unsafe.types.UTF8String
  *   Struct: Object[] / java.util.List / java POJO
  *   Union: class StandardUnion { byte tag; Object object }
  *
- * NOTICE: HiveVarchar is not supported by catalyst, it will be simply considered as String type.
+ * NOTICE: HiveVarchar/HiveChar is not supported by catalyst, it will be simply considered as
+ *  String type.
  *
  *
  * 2. Hive ObjectInspector is a group of flexible APIs to inspect value in different data
@@ -137,6 +140,7 @@ import org.apache.spark.unsafe.types.UTF8String
  * Primitive Object Inspectors:
  *     WritableConstantStringObjectInspector
  *     WritableConstantHiveVarcharObjectInspector
+ *     WritableConstantHiveCharObjectInspector
  *     WritableConstantHiveDecimalObjectInspector
  *     WritableConstantTimestampObjectInspector
  *     WritableConstantIntObjectInspector
@@ -259,6 +263,8 @@ private[hive] trait HiveInspectors {
       UTF8String.fromString(poi.getWritableConstantValue.toString)
     case poi: WritableConstantHiveVarcharObjectInspector =>
       UTF8String.fromString(poi.getWritableConstantValue.getHiveVarchar.getValue)
+    case poi: WritableConstantHiveCharObjectInspector =>
+      UTF8String.fromString(poi.getWritableConstantValue.getHiveChar.getValue)
     case poi: WritableConstantHiveDecimalObjectInspector =>
       HiveShim.toCatalystDecimal(
         PrimitiveObjectInspectorFactory.javaHiveDecimalObjectInspector,
@@ -303,11 +309,15 @@ private[hive] trait HiveInspectors {
     case _ if data == null => null
     case poi: VoidObjectInspector => null // always be null for void object inspector
     case pi: PrimitiveObjectInspector => pi match {
-      // We think HiveVarchar is also a String
+      // We think HiveVarchar/HiveChar is also a String
       case hvoi: HiveVarcharObjectInspector if hvoi.preferWritable() =>
         UTF8String.fromString(hvoi.getPrimitiveWritableObject(data).getHiveVarchar.getValue)
       case hvoi: HiveVarcharObjectInspector =>
         UTF8String.fromString(hvoi.getPrimitiveJavaObject(data).getValue)
+      case hvoi: HiveCharObjectInspector if hvoi.preferWritable() =>
+        UTF8String.fromString(hvoi.getPrimitiveWritableObject(data).getHiveChar.getValue)
+      case hvoi: HiveCharObjectInspector =>
+        UTF8String.fromString(hvoi.getPrimitiveJavaObject(data).getValue)
       case x: StringObjectInspector if x.preferWritable() =>
         UTF8String.fromString(x.getPrimitiveWritableObject(data).toString)
       case x: StringObjectInspector =>
@@ -377,6 +387,15 @@ private[hive] trait HiveInspectors {
           null
         }
 
+    case _: JavaHiveCharObjectInspector =>
+      (o: Any) =>
+        if (o != null) {
+          val s = o.asInstanceOf[UTF8String].toString
+          new HiveChar(s, s.size)
+        } else {
+          null
+        }
+
     case _: JavaHiveDecimalObjectInspector =>
       (o: Any) =>
         if (o != null) {
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
index 69f481c49a65..70ee02823eeb 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala
@@ -382,6 +382,9 @@ private[hive] object HadoopTableReader extends HiveInspectors with Logging {
         case oi: HiveVarcharObjectInspector =>
           (value: Any, row: MutableRow, ordinal: Int) =>
             row.update(ordinal, UTF8String.fromString(oi.getPrimitiveJavaObject(value).getValue))
+        case oi: HiveCharObjectInspector =>
+          (value: Any, row: MutableRow, ordinal: Int) =>
+            row.update(ordinal, UTF8String.fromString(oi.getPrimitiveJavaObject(value).getValue))
         case oi: HiveDecimalObjectInspector =>
           (value: Any, row: MutableRow, ordinal: Int) =>
             row.update(ordinal, HiveShim.toCatalystDecimal(oi, value))
diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
index 48bbb21e6c1d..346840079b85 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveShim.scala
@@ -321,7 +321,8 @@ private[client] class Shim_v0_13 extends Shim_v0_12 {
   def convertFilters(table: Table, filters: Seq[Expression]): String = {
     // hive varchar is treated as catalyst string, but hive varchar can't be pushed down.
     val varcharKeys = table.getPartitionKeys.asScala
-      .filter(col => col.getType.startsWith(serdeConstants.VARCHAR_TYPE_NAME))
+      .filter(col => col.getType.startsWith(serdeConstants.VARCHAR_TYPE_NAME) ||
+        col.getType.startsWith(serdeConstants.CHAR_TYPE_NAME))
       .map(col => col.getName).toSet
 
     filters.collect {

From 1a5baaa6517872b9a4fd6cd41c4b2cf1e390f6d1 Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 23 Nov 2015 10:13:59 -0800
Subject: [PATCH 849/896] [SPARK-11894][SQL] fix isNull for GetInternalRowField

We should use `InternalRow.isNullAt` to check if the field is null before calling `InternalRow.getXXX`

Thanks gatorsmile who discovered this bug.

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9904 from cloud-fan/null.
---
 .../sql/catalyst/expressions/objects.scala    | 23 ++++++++-----------
 .../org/apache/spark/sql/DatasetSuite.scala   | 15 +++++++++++-
 2 files changed, 23 insertions(+), 15 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 82317d338516..4a1f419f0ad8 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -236,11 +236,6 @@ case class NewInstance(
     }
 
     if (propagateNull) {
-      val objNullCheck = if (ctx.defaultValue(dataType) == "null") {
-        s"${ev.isNull} = ${ev.value} == null;"
-      } else {
-        ""
-      }
       val argsNonNull = s"!(${argGen.map(_.isNull).mkString(" || ")})"
 
       s"""
@@ -531,15 +526,15 @@ case class GetInternalRowField(child: Expression, ordinal: Int, dataType: DataTy
     throw new UnsupportedOperationException("Only code-generated evaluation is supported")
 
   override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    val row = child.gen(ctx)
-    s"""
-      ${row.code}
-      final boolean ${ev.isNull} = ${row.isNull};
-      ${ctx.javaType(dataType)} ${ev.value} = ${ctx.defaultValue(dataType)};
-      if (!${ev.isNull}) {
-        ${ev.value} = ${ctx.getValue(row.value, dataType, ordinal.toString)};
-      }
-    """
+    nullSafeCodeGen(ctx, ev, eval => {
+      s"""
+        if ($eval.isNullAt($ordinal)) {
+          ${ev.isNull} = true;
+        } else {
+          ${ev.value} = ${ctx.getValue(eval, dataType, ordinal.toString)};
+        }
+      """
+    })
   }
 }
 
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 9da02550b39c..cc8e4325fd2f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -386,7 +386,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       Seq((JavaData(1), 1L), (JavaData(2), 1L)))
   }
 
-  ignore("Java encoder self join") {
+  test("Java encoder self join") {
     implicit val kryoEncoder = Encoders.javaSerialization[JavaData]
     val ds = Seq(JavaData(1), JavaData(2)).toDS()
     assert(ds.joinWith(ds, lit(true)).collect().toSet ==
@@ -396,6 +396,19 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
         (JavaData(2), JavaData(1)),
         (JavaData(2), JavaData(2))))
   }
+
+  test("SPARK-11894: Incorrect results are returned when using null") {
+    val nullInt = null.asInstanceOf[java.lang.Integer]
+    val ds1 = Seq((nullInt, "1"), (new java.lang.Integer(22), "2")).toDS()
+    val ds2 = Seq((nullInt, "1"), (new java.lang.Integer(22), "2")).toDS()
+
+    checkAnswer(
+      ds1.joinWith(ds2, lit(true)),
+      ((nullInt, "1"), (nullInt, "1")),
+      ((new java.lang.Integer(22), "2"), (nullInt, "1")),
+      ((nullInt, "1"), (new java.lang.Integer(22), "2")),
+      ((new java.lang.Integer(22), "2"), (new java.lang.Integer(22), "2")))
+  }
 }
 
 

From f2996e0d12eeb989b1bfa51a3f6fa54ce1ed4fca Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 23 Nov 2015 10:15:40 -0800
Subject: [PATCH 850/896] [SPARK-11921][SQL] fix `nullable` of encoder schema

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9906 from cloud-fan/nullable.
---
 .../catalyst/encoders/ExpressionEncoder.scala | 15 +++++++-
 .../encoders/ExpressionEncoderSuite.scala     | 38 ++++++++++++++++++-
 2 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 6eeba1442c1f..7bc9aed0b204 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -54,8 +54,13 @@ object ExpressionEncoder {
     val toRowExpression = ScalaReflection.extractorsFor[T](inputObject)
     val fromRowExpression = ScalaReflection.constructorFor[T]
 
+    val schema = ScalaReflection.schemaFor[T] match {
+      case ScalaReflection.Schema(s: StructType, _) => s
+      case ScalaReflection.Schema(dt, nullable) => new StructType().add("value", dt, nullable)
+    }
+
     new ExpressionEncoder[T](
-      toRowExpression.dataType,
+      schema,
       flat,
       toRowExpression.flatten,
       fromRowExpression,
@@ -71,7 +76,13 @@ object ExpressionEncoder {
     encoders.foreach(_.assertUnresolved())
 
     val schema = StructType(encoders.zipWithIndex.map {
-      case (e, i) => StructField(s"_${i + 1}", if (e.flat) e.schema.head.dataType else e.schema)
+      case (e, i) =>
+        val (dataType, nullable) = if (e.flat) {
+          e.schema.head.dataType -> e.schema.head.nullable
+        } else {
+          e.schema -> true
+        }
+        StructField(s"_${i + 1}", dataType, nullable)
     })
 
     val cls = Utils.getContextOrSparkClassLoader.loadClass(s"scala.Tuple${encoders.size}")
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
index 76459b34a484..d6ca138672ef 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoderSuite.scala
@@ -30,7 +30,7 @@ import org.apache.spark.sql.Encoders
 import org.apache.spark.sql.catalyst.expressions.AttributeReference
 import org.apache.spark.sql.catalyst.util.ArrayData
 import org.apache.spark.sql.catalyst.{OptionalData, PrimitiveData}
-import org.apache.spark.sql.types.ArrayType
+import org.apache.spark.sql.types.{StructType, ArrayType}
 
 case class RepeatedStruct(s: Seq[PrimitiveData])
 
@@ -238,6 +238,42 @@ class ExpressionEncoderSuite extends SparkFunSuite {
     ExpressionEncoder.tuple(intEnc, ExpressionEncoder.tuple(intEnc, longEnc))
   }
 
+  test("nullable of encoder schema") {
+    def checkNullable[T: ExpressionEncoder](nullable: Boolean*): Unit = {
+      assert(implicitly[ExpressionEncoder[T]].schema.map(_.nullable) === nullable.toSeq)
+    }
+
+    // test for flat encoders
+    checkNullable[Int](false)
+    checkNullable[Option[Int]](true)
+    checkNullable[java.lang.Integer](true)
+    checkNullable[String](true)
+
+    // test for product encoders
+    checkNullable[(String, Int)](true, false)
+    checkNullable[(Int, java.lang.Long)](false, true)
+
+    // test for nested product encoders
+    {
+      val schema = ExpressionEncoder[(Int, (String, Int))].schema
+      assert(schema(0).nullable === false)
+      assert(schema(1).nullable === true)
+      assert(schema(1).dataType.asInstanceOf[StructType](0).nullable === true)
+      assert(schema(1).dataType.asInstanceOf[StructType](1).nullable === false)
+    }
+
+    // test for tupled encoders
+    {
+      val schema = ExpressionEncoder.tuple(
+        ExpressionEncoder[Int],
+        ExpressionEncoder[(String, Int)]).schema
+      assert(schema(0).nullable === false)
+      assert(schema(1).nullable === true)
+      assert(schema(1).dataType.asInstanceOf[StructType](0).nullable === true)
+      assert(schema(1).dataType.asInstanceOf[StructType](1).nullable === false)
+    }
+  }
+
   private val outers: ConcurrentMap[String, AnyRef] = new MapMaker().weakValues().makeMap()
   outers.put(getClass.getName, this)
   private def encodeDecodeTest[T : ExpressionEncoder](

From 946b406519af58c79041217e6f93854b6cf80acd Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Mon, 23 Nov 2015 10:39:33 -0800
Subject: [PATCH 851/896] [SPARK-11913][SQL] support typed aggregate with
 complex buffer schema

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9898 from cloud-fan/agg.
---
 .../aggregate/TypedAggregateExpression.scala  | 25 +++++++----
 .../spark/sql/DatasetAggregatorSuite.scala    | 41 ++++++++++++++++++-
 2 files changed, 56 insertions(+), 10 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
index 6ce41aaf01e2..a9719128a626 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TypedAggregateExpression.scala
@@ -23,9 +23,8 @@ import org.apache.spark.Logging
 import org.apache.spark.sql.Encoder
 import org.apache.spark.sql.expressions.Aggregator
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.encoders.encoderFor
+import org.apache.spark.sql.catalyst.encoders.{OuterScopes, encoderFor, ExpressionEncoder}
 import org.apache.spark.sql.catalyst.expressions.aggregate.ImperativeAggregate
-import org.apache.spark.sql.catalyst.encoders.ExpressionEncoder
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.types._
 
@@ -46,14 +45,12 @@ object TypedAggregateExpression {
 /**
  * This class is a rough sketch of how to hook `Aggregator` into the Aggregation system.  It has
  * the following limitations:
- *  - It assumes the aggregator reduces and returns a single column of type `long`.
- *  - It might only work when there is a single aggregator in the first column.
  *  - It assumes the aggregator has a zero, `0`.
  */
 case class TypedAggregateExpression(
     aggregator: Aggregator[Any, Any, Any],
     aEncoder: Option[ExpressionEncoder[Any]], // Should be bound.
-    bEncoder: ExpressionEncoder[Any], // Should be bound.
+    unresolvedBEncoder: ExpressionEncoder[Any],
     cEncoder: ExpressionEncoder[Any],
     children: Seq[Attribute],
     mutableAggBufferOffset: Int,
@@ -80,10 +77,14 @@ case class TypedAggregateExpression(
 
   override lazy val inputTypes: Seq[DataType] = Nil
 
-  override val aggBufferSchema: StructType = bEncoder.schema
+  override val aggBufferSchema: StructType = unresolvedBEncoder.schema
 
   override val aggBufferAttributes: Seq[AttributeReference] = aggBufferSchema.toAttributes
 
+  val bEncoder = unresolvedBEncoder
+    .resolve(aggBufferAttributes, OuterScopes.outerScopes)
+    .bind(aggBufferAttributes)
+
   // Note: although this simply copies aggBufferAttributes, this common code can not be placed
   // in the superclass because that will lead to initialization ordering issues.
   override val inputAggBufferAttributes: Seq[AttributeReference] =
@@ -93,12 +94,18 @@ case class TypedAggregateExpression(
   lazy val boundA = aEncoder.get
 
   private def updateBuffer(buffer: MutableRow, value: InternalRow): Unit = {
-    // todo: need a more neat way to assign the value.
     var i = 0
     while (i < aggBufferAttributes.length) {
+      val offset = mutableAggBufferOffset + i
       aggBufferSchema(i).dataType match {
-        case IntegerType => buffer.setInt(mutableAggBufferOffset + i, value.getInt(i))
-        case LongType => buffer.setLong(mutableAggBufferOffset + i, value.getLong(i))
+        case BooleanType => buffer.setBoolean(offset, value.getBoolean(i))
+        case ByteType => buffer.setByte(offset, value.getByte(i))
+        case ShortType => buffer.setShort(offset, value.getShort(i))
+        case IntegerType => buffer.setInt(offset, value.getInt(i))
+        case LongType => buffer.setLong(offset, value.getLong(i))
+        case FloatType => buffer.setFloat(offset, value.getFloat(i))
+        case DoubleType => buffer.setDouble(offset, value.getDouble(i))
+        case other => buffer.update(offset, value.get(i, other))
       }
       i += 1
     }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
index 937758979001..19dce5d1e2f3 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetAggregatorSuite.scala
@@ -67,7 +67,7 @@ object ComplexResultAgg extends Aggregator[(String, Int), (Long, Long), (Long, L
 }
 
 case class AggData(a: Int, b: String)
-object ClassInputAgg extends Aggregator[AggData, Int, Int] with Serializable {
+object ClassInputAgg extends Aggregator[AggData, Int, Int] {
   /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
   override def zero: Int = 0
 
@@ -88,6 +88,28 @@ object ClassInputAgg extends Aggregator[AggData, Int, Int] with Serializable {
   override def merge(b1: Int, b2: Int): Int = b1 + b2
 }
 
+object ComplexBufferAgg extends Aggregator[AggData, (Int, AggData), Int] {
+  /** A zero value for this aggregation. Should satisfy the property that any b + zero = b */
+  override def zero: (Int, AggData) = 0 -> AggData(0, "0")
+
+  /**
+   * Combine two values to produce a new value.  For performance, the function may modify `b` and
+   * return it instead of constructing new object for b.
+   */
+  override def reduce(b: (Int, AggData), a: AggData): (Int, AggData) = (b._1 + 1, a)
+
+  /**
+   * Transform the output of the reduction.
+   */
+  override def finish(reduction: (Int, AggData)): Int = reduction._1
+
+  /**
+   * Merge two intermediate values
+   */
+  override def merge(b1: (Int, AggData), b2: (Int, AggData)): (Int, AggData) =
+    (b1._1 + b2._1, b1._2)
+}
+
 class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
 
   import testImplicits._
@@ -168,4 +190,21 @@ class DatasetAggregatorSuite extends QueryTest with SharedSQLContext {
       ds.groupBy(_.b).agg(ClassInputAgg.toColumn),
       ("one", 1))
   }
+
+  test("typed aggregation: complex input") {
+    val ds = Seq(AggData(1, "one"), AggData(2, "two")).toDS()
+
+    checkAnswer(
+      ds.select(ComplexBufferAgg.toColumn),
+      2
+    )
+
+    checkAnswer(
+      ds.select(expr("avg(a)").as[Double], ComplexBufferAgg.toColumn),
+      (1.5, 2))
+
+    checkAnswer(
+      ds.groupBy(_.b).agg(ComplexBufferAgg.toColumn),
+      ("one", 1), ("two", 1))
+  }
 }

From 5fd86e4fc2e06d2403ca538ae417580c93b69e06 Mon Sep 17 00:00:00 2001
From: jerryshao <sshao@hortonworks.com>
Date: Mon, 23 Nov 2015 10:41:17 -0800
Subject: [PATCH 852/896] [SPARK-7173][YARN] Add label expression support for
 application master

Add label expression support for AM to restrict it runs on the specific set of nodes. I tested it locally and works fine.

sryza and vanzin please help to review, thanks a lot.

Author: jerryshao <sshao@hortonworks.com>

Closes #9800 from jerryshao/SPARK-7173.
---
 docs/running-on-yarn.md                       |  9 +++++++
 .../org/apache/spark/deploy/yarn/Client.scala | 26 ++++++++++++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index db6bfa69ee0f..925a1e0ba6fc 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -326,6 +326,15 @@ If you need a reference to the proper location to put log files in the YARN so t
   Otherwise, the client process will exit after submission.
   </td>
 </tr>
+<tr>
+  <td><code>spark.yarn.am.nodeLabelExpression</code></td>
+  <td>(none)</td>
+  <td>
+  A YARN node label expression that restricts the set of nodes AM will be scheduled on.
+  Only versions of YARN greater than or equal to 2.6 support node label expressions, so when
+  running against earlier versions, this property will be ignored.
+  </td>
+</tr>
 <tr>
   <td><code>spark.yarn.executor.nodeLabelExpression</code></td>
   <td>(none)</td>
diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index ba799884f568..a77a3e2420e2 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -225,7 +225,31 @@ private[spark] class Client(
     val capability = Records.newRecord(classOf[Resource])
     capability.setMemory(args.amMemory + amMemoryOverhead)
     capability.setVirtualCores(args.amCores)
-    appContext.setResource(capability)
+
+    if (sparkConf.contains("spark.yarn.am.nodeLabelExpression")) {
+      try {
+        val amRequest = Records.newRecord(classOf[ResourceRequest])
+        amRequest.setResourceName(ResourceRequest.ANY)
+        amRequest.setPriority(Priority.newInstance(0))
+        amRequest.setCapability(capability)
+        amRequest.setNumContainers(1)
+        val amLabelExpression = sparkConf.get("spark.yarn.am.nodeLabelExpression")
+        val method = amRequest.getClass.getMethod("setNodeLabelExpression", classOf[String])
+        method.invoke(amRequest, amLabelExpression)
+
+        val setResourceRequestMethod =
+          appContext.getClass.getMethod("setAMContainerResourceRequest", classOf[ResourceRequest])
+        setResourceRequestMethod.invoke(appContext, amRequest)
+      } catch {
+        case e: NoSuchMethodException =>
+          logWarning("Ignoring spark.yarn.am.nodeLabelExpression because the version " +
+            "of YARN does not support it")
+          appContext.setResource(capability)
+      }
+    } else {
+      appContext.setResource(capability)
+    }
+
     appContext
   }
 

From 5231cd5acaae69d735ba3209531705cc222f3cfb Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 23 Nov 2015 10:45:23 -0800
Subject: [PATCH 853/896] [SPARK-11762][NETWORK] Account for active streams
 when couting outstanding requests.

This way the timeout handling code can correctly close "hung" channels that are
processing streams.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9747 from vanzin/SPARK-11762.
---
 .../network/client/StreamInterceptor.java     | 12 ++++++++-
 .../client/TransportResponseHandler.java      | 15 +++++++++--
 .../TransportResponseHandlerSuite.java        | 27 +++++++++++++++++++
 3 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java b/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
index 02230a00e69f..88ba3ccebdf2 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/StreamInterceptor.java
@@ -30,13 +30,19 @@
  */
 class StreamInterceptor implements TransportFrameDecoder.Interceptor {
 
+  private final TransportResponseHandler handler;
   private final String streamId;
   private final long byteCount;
   private final StreamCallback callback;
 
   private volatile long bytesRead;
 
-  StreamInterceptor(String streamId, long byteCount, StreamCallback callback) {
+  StreamInterceptor(
+      TransportResponseHandler handler,
+      String streamId,
+      long byteCount,
+      StreamCallback callback) {
+    this.handler = handler;
     this.streamId = streamId;
     this.byteCount = byteCount;
     this.callback = callback;
@@ -45,11 +51,13 @@ class StreamInterceptor implements TransportFrameDecoder.Interceptor {
 
   @Override
   public void exceptionCaught(Throwable cause) throws Exception {
+    handler.deactivateStream();
     callback.onFailure(streamId, cause);
   }
 
   @Override
   public void channelInactive() throws Exception {
+    handler.deactivateStream();
     callback.onFailure(streamId, new ClosedChannelException());
   }
 
@@ -65,8 +73,10 @@ public boolean handle(ByteBuf buf) throws Exception {
       RuntimeException re = new IllegalStateException(String.format(
         "Read too many bytes? Expected %d, but read %d.", byteCount, bytesRead));
       callback.onFailure(streamId, re);
+      handler.deactivateStream();
       throw re;
     } else if (bytesRead == byteCount) {
+      handler.deactivateStream();
       callback.onComplete(streamId);
     }
 
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
index ed3f36af5804..cc88991b588c 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
@@ -24,6 +24,7 @@
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.atomic.AtomicLong;
 
+import com.google.common.annotations.VisibleForTesting;
 import io.netty.channel.Channel;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -56,6 +57,7 @@ public class TransportResponseHandler extends MessageHandler<ResponseMessage> {
   private final Map<Long, RpcResponseCallback> outstandingRpcs;
 
   private final Queue<StreamCallback> streamCallbacks;
+  private volatile boolean streamActive;
 
   /** Records the time (in system nanoseconds) that the last fetch or RPC request was sent. */
   private final AtomicLong timeOfLastRequestNs;
@@ -87,9 +89,15 @@ public void removeRpcRequest(long requestId) {
   }
 
   public void addStreamCallback(StreamCallback callback) {
+    timeOfLastRequestNs.set(System.nanoTime());
     streamCallbacks.offer(callback);
   }
 
+  @VisibleForTesting
+  public void deactivateStream() {
+    streamActive = false;
+  }
+
   /**
    * Fire the failure callback for all outstanding requests. This is called when we have an
    * uncaught exception or pre-mature connection termination.
@@ -177,14 +185,16 @@ public void handle(ResponseMessage message) {
       StreamResponse resp = (StreamResponse) message;
       StreamCallback callback = streamCallbacks.poll();
       if (callback != null) {
-        StreamInterceptor interceptor = new StreamInterceptor(resp.streamId, resp.byteCount,
+        StreamInterceptor interceptor = new StreamInterceptor(this, resp.streamId, resp.byteCount,
           callback);
         try {
           TransportFrameDecoder frameDecoder = (TransportFrameDecoder)
             channel.pipeline().get(TransportFrameDecoder.HANDLER_NAME);
           frameDecoder.setInterceptor(interceptor);
+          streamActive = true;
         } catch (Exception e) {
           logger.error("Error installing stream handler.", e);
+          deactivateStream();
         }
       } else {
         logger.error("Could not find callback for StreamResponse.");
@@ -208,7 +218,8 @@ public void handle(ResponseMessage message) {
 
   /** Returns total number of outstanding requests (fetch requests + rpcs) */
   public int numOutstandingRequests() {
-    return outstandingFetches.size() + outstandingRpcs.size();
+    return outstandingFetches.size() + outstandingRpcs.size() + streamCallbacks.size() +
+      (streamActive ? 1 : 0);
   }
 
   /** Returns the time in nanoseconds of when the last request was sent out. */
diff --git a/network/common/src/test/java/org/apache/spark/network/TransportResponseHandlerSuite.java b/network/common/src/test/java/org/apache/spark/network/TransportResponseHandlerSuite.java
index 17a03ebe88a9..30144f4a9fc7 100644
--- a/network/common/src/test/java/org/apache/spark/network/TransportResponseHandlerSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/TransportResponseHandlerSuite.java
@@ -17,6 +17,7 @@
 
 package org.apache.spark.network;
 
+import io.netty.channel.Channel;
 import io.netty.channel.local.LocalChannel;
 import org.junit.Test;
 
@@ -28,12 +29,16 @@
 import org.apache.spark.network.buffer.ManagedBuffer;
 import org.apache.spark.network.client.ChunkReceivedCallback;
 import org.apache.spark.network.client.RpcResponseCallback;
+import org.apache.spark.network.client.StreamCallback;
 import org.apache.spark.network.client.TransportResponseHandler;
 import org.apache.spark.network.protocol.ChunkFetchFailure;
 import org.apache.spark.network.protocol.ChunkFetchSuccess;
 import org.apache.spark.network.protocol.RpcFailure;
 import org.apache.spark.network.protocol.RpcResponse;
 import org.apache.spark.network.protocol.StreamChunkId;
+import org.apache.spark.network.protocol.StreamFailure;
+import org.apache.spark.network.protocol.StreamResponse;
+import org.apache.spark.network.util.TransportFrameDecoder;
 
 public class TransportResponseHandlerSuite {
   @Test
@@ -112,4 +117,26 @@ public void handleFailedRPC() {
     verify(callback, times(1)).onFailure((Throwable) any());
     assertEquals(0, handler.numOutstandingRequests());
   }
+
+  @Test
+  public void testActiveStreams() {
+    Channel c = new LocalChannel();
+    c.pipeline().addLast(TransportFrameDecoder.HANDLER_NAME, new TransportFrameDecoder());
+    TransportResponseHandler handler = new TransportResponseHandler(c);
+
+    StreamResponse response = new StreamResponse("stream", 1234L, null);
+    StreamCallback cb = mock(StreamCallback.class);
+    handler.addStreamCallback(cb);
+    assertEquals(1, handler.numOutstandingRequests());
+    handler.handle(response);
+    assertEquals(1, handler.numOutstandingRequests());
+    handler.deactivateStream();
+    assertEquals(0, handler.numOutstandingRequests());
+
+    StreamFailure failure = new StreamFailure("stream", "uh-oh");
+    handler.addStreamCallback(cb);
+    assertEquals(1, handler.numOutstandingRequests());
+    handler.handle(failure);
+    assertEquals(0, handler.numOutstandingRequests());
+  }
 }

From 98d7ec7df4bb115dbd84cb9acd744b6c8abfebd5 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Mon, 23 Nov 2015 11:51:29 -0800
Subject: [PATCH 854/896] [SPARK-11920][ML][DOC] ML LinearRegression should use
 correct dataset in examples and user guide doc

ML ```LinearRegression``` use ```data/mllib/sample_libsvm_data.txt``` as dataset in examples and user guide doc, but it's actually classification dataset rather than regression dataset. We should use ```data/mllib/sample_linear_regression_data.txt``` instead.
The deeper causes is that ```LinearRegression``` with "normal" solver can not solve this dataset correctly, may be due to the ill condition and unreasonable label. This issue has been reported at [SPARK-11918](https://issues.apache.org/jira/browse/SPARK-11918).
It will confuse users if they run the example code but get exception, so we should make this change which can clearly illustrate the usage of ```LinearRegression``` algorithm.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9905 from yanboliang/spark-11920.
---
 .../examples/ml/JavaLinearRegressionWithElasticNetExample.java | 2 +-
 .../src/main/python/ml/linear_regression_with_elastic_net.py   | 3 ++-
 .../examples/ml/LinearRegressionWithElasticNetExample.scala    | 3 ++-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java b/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
index 593f8fb3e9fe..4ad7676c8d32 100644
--- a/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
+++ b/examples/src/main/java/org/apache/spark/examples/ml/JavaLinearRegressionWithElasticNetExample.java
@@ -37,7 +37,7 @@ public static void main(String[] args) {
     // $example on$
     // Load training data
     DataFrame training = sqlContext.read().format("libsvm")
-      .load("data/mllib/sample_libsvm_data.txt");
+      .load("data/mllib/sample_linear_regression_data.txt");
 
     LinearRegression lr = new LinearRegression()
       .setMaxIter(10)
diff --git a/examples/src/main/python/ml/linear_regression_with_elastic_net.py b/examples/src/main/python/ml/linear_regression_with_elastic_net.py
index b0278276330c..a4cd40cf2672 100644
--- a/examples/src/main/python/ml/linear_regression_with_elastic_net.py
+++ b/examples/src/main/python/ml/linear_regression_with_elastic_net.py
@@ -29,7 +29,8 @@
 
     # $example on$
     # Load training data
-    training = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+    training = sqlContext.read.format("libsvm")\
+        .load("data/mllib/sample_linear_regression_data.txt")
 
     lr = LinearRegression(maxIter=10, regParam=0.3, elasticNetParam=0.8)
 
diff --git a/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
index 5a51ece6f9ba..22c824cea84d 100644
--- a/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/ml/LinearRegressionWithElasticNetExample.scala
@@ -33,7 +33,8 @@ object LinearRegressionWithElasticNetExample {
 
     // $example on$
     // Load training data
-    val training = sqlCtx.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
+    val training = sqlCtx.read.format("libsvm")
+      .load("data/mllib/sample_linear_regression_data.txt")
 
     val lr = new LinearRegression()
       .setMaxIter(10)

From f6dcc6e96ad3f88563d717d5b6c45394b44db747 Mon Sep 17 00:00:00 2001
From: Mortada Mehyar <mortada.mehyar@gmail.com>
Date: Mon, 23 Nov 2015 12:03:15 -0800
Subject: [PATCH 855/896] [SPARK-11837][EC2] python3 compatibility for
 launching ec2 m3 instances

this currently breaks for python3 because `string` module doesn't have `letters` anymore, instead `ascii_letters` should be used

Author: Mortada Mehyar <mortada.mehyar@gmail.com>

Closes #9797 from mortada/python3_fix.
---
 ec2/spark_ec2.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ec2/spark_ec2.py b/ec2/spark_ec2.py
index 9327e21e43db..9fd652a3df4c 100755
--- a/ec2/spark_ec2.py
+++ b/ec2/spark_ec2.py
@@ -595,7 +595,7 @@ def launch_cluster(conn, opts, cluster_name):
             dev = BlockDeviceType()
             dev.ephemeral_name = 'ephemeral%d' % i
             # The first ephemeral drive is /dev/sdb.
-            name = '/dev/sd' + string.letters[i + 1]
+            name = '/dev/sd' + string.ascii_letters[i + 1]
             block_map[name] = dev
 
     # Launch slaves

From 1b6e938be836786bac542fa430580248161e5403 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Mon, 23 Nov 2015 13:19:10 -0800
Subject: [PATCH 856/896] [SPARK-4424] Remove
 spark.driver.allowMultipleContexts override in tests

This patch removes `spark.driver.allowMultipleContexts=true` from our test configuration. The multiple SparkContexts check was originally disabled because certain tests suites in SQL needed to create multiple contexts. As far as I know, this configuration change is no longer necessary, so we should remove it in order to make it easier to find test cleanup bugs.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9865 from JoshRosen/SPARK-4424.
---
 pom.xml                  | 2 --
 project/SparkBuild.scala | 1 -
 2 files changed, 3 deletions(-)

diff --git a/pom.xml b/pom.xml
index ad849112ce76..234fd5dea1a6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1958,7 +1958,6 @@
               <spark.master.rest.enabled>false</spark.master.rest.enabled>
               <spark.ui.enabled>false</spark.ui.enabled>
               <spark.ui.showConsoleProgress>false</spark.ui.showConsoleProgress>
-              <spark.driver.allowMultipleContexts>true</spark.driver.allowMultipleContexts>
               <spark.unsafe.exceptionOnMemoryLeak>true</spark.unsafe.exceptionOnMemoryLeak>
               <!-- Needed by sql/hive tests. -->
               <test.src.tables>src</test.src.tables>
@@ -1997,7 +1996,6 @@
               <spark.testing>1</spark.testing>
               <spark.ui.enabled>false</spark.ui.enabled>
               <spark.ui.showConsoleProgress>false</spark.ui.showConsoleProgress>
-              <spark.driver.allowMultipleContexts>true</spark.driver.allowMultipleContexts>
               <spark.unsafe.exceptionOnMemoryLeak>true</spark.unsafe.exceptionOnMemoryLeak>
               <!-- Needed by sql/hive tests. -->
               <test.src.tables>__not_used__</test.src.tables>
diff --git a/project/SparkBuild.scala b/project/SparkBuild.scala
index 67724c4e9e41..f575f0012d59 100644
--- a/project/SparkBuild.scala
+++ b/project/SparkBuild.scala
@@ -632,7 +632,6 @@ object TestSettings {
     javaOptions in Test += "-Dspark.master.rest.enabled=false",
     javaOptions in Test += "-Dspark.ui.enabled=false",
     javaOptions in Test += "-Dspark.ui.showConsoleProgress=false",
-    javaOptions in Test += "-Dspark.driver.allowMultipleContexts=true",
     javaOptions in Test += "-Dspark.unsafe.exceptionOnMemoryLeak=true",
     javaOptions in Test += "-Dsun.io.serialization.extendedDebugInfo=true",
     javaOptions in Test += "-Dderby.system.durability=test",

From 1d9120201012213edb1971a09e0849336dbb9415 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Mon, 23 Nov 2015 13:44:30 -0800
Subject: [PATCH 857/896] [SPARK-11836][SQL] udf/cast should not create new
 SQLContext

They should use the existing SQLContext.

Author: Davies Liu <davies@databricks.com>

Closes #9914 from davies/create_udf.
---
 python/pyspark/sql/column.py    | 7 ++++---
 python/pyspark/sql/functions.py | 7 ++++---
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/python/pyspark/sql/column.py b/python/pyspark/sql/column.py
index 9ca8e1f264cf..81fd4e782628 100644
--- a/python/pyspark/sql/column.py
+++ b/python/pyspark/sql/column.py
@@ -346,9 +346,10 @@ def cast(self, dataType):
         if isinstance(dataType, basestring):
             jc = self._jc.cast(dataType)
         elif isinstance(dataType, DataType):
-            sc = SparkContext._active_spark_context
-            ssql_ctx = sc._jvm.SQLContext(sc._jsc.sc())
-            jdt = ssql_ctx.parseDataType(dataType.json())
+            from pyspark.sql import SQLContext
+            sc = SparkContext.getOrCreate()
+            ctx = SQLContext.getOrCreate(sc)
+            jdt = ctx._ssql_ctx.parseDataType(dataType.json())
             jc = self._jc.cast(jdt)
         else:
             raise TypeError("unexpected type: %s" % type(dataType))
diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index c3da513c1389..a1ca723bbd7a 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -1457,14 +1457,15 @@ def __init__(self, func, returnType, name=None):
         self._judf = self._create_judf(name)
 
     def _create_judf(self, name):
+        from pyspark.sql import SQLContext
         f, returnType = self.func, self.returnType  # put them in closure `func`
         func = lambda _, it: map(lambda x: returnType.toInternal(f(*x)), it)
         ser = AutoBatchedSerializer(PickleSerializer())
         command = (func, None, ser, ser)
-        sc = SparkContext._active_spark_context
+        sc = SparkContext.getOrCreate()
         pickled_command, broadcast_vars, env, includes = _prepare_for_python_RDD(sc, command, self)
-        ssql_ctx = sc._jvm.SQLContext(sc._jsc.sc())
-        jdt = ssql_ctx.parseDataType(self.returnType.json())
+        ctx = SQLContext.getOrCreate(sc)
+        jdt = ctx._ssql_ctx.parseDataType(self.returnType.json())
         if name is None:
             name = f.__name__ if hasattr(f, '__name__') else f.__class__.__name__
         judf = sc._jvm.UserDefinedPythonFunction(name, bytearray(pickled_command), env, includes,

From 242be7daed9b01d19794bb2cf1ac421fe5ab7262 Mon Sep 17 00:00:00 2001
From: Luciano Resende <lresende@apache.org>
Date: Mon, 23 Nov 2015 13:46:34 -0800
Subject: [PATCH 858/896] [SPARK-11910][STREAMING][DOCS] Update twitter4j
 dependency version

Author: Luciano Resende <lresende@apache.org>

Closes #9892 from lresende/SPARK-11910.
---
 docs/streaming-programming-guide.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/streaming-programming-guide.md b/docs/streaming-programming-guide.md
index 96b36b7a7320..ed6b28c28213 100644
--- a/docs/streaming-programming-guide.md
+++ b/docs/streaming-programming-guide.md
@@ -723,7 +723,7 @@ Some of these advanced sources are as follows.
 
 - **Kinesis:** Spark Streaming {{site.SPARK_VERSION_SHORT}} is compatible with Kinesis Client Library 1.2.1. See the [Kinesis Integration Guide](streaming-kinesis-integration.html) for more details.
 
-- **Twitter:** Spark Streaming's TwitterUtils uses Twitter4j 3.0.3 to get the public stream of tweets using
+- **Twitter:** Spark Streaming's TwitterUtils uses Twitter4j to get the public stream of tweets using
   [Twitter's Streaming API](https://dev.twitter.com/docs/streaming-apis). Authentication information
   can be provided by any of the [methods](http://twitter4j.org/en/configuration.html) supported by
   Twitter4J library. You can either get the public stream, or get the filtered stream based on a

From 7cfa4c6bc36d97e459d4adee7b03d537d63c337e Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 23 Nov 2015 13:51:43 -0800
Subject: [PATCH 859/896] [SPARK-11865][NETWORK] Avoid returning inactive
 client in TransportClientFactory.

There's a very narrow race here where it would be possible for the timeout handler
to close a channel after the client factory verified that the channel was still
active. This change makes sure the client is marked as being recently in use so
that the timeout handler does not close it until a new timeout cycle elapses.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9853 from vanzin/SPARK-11865.
---
 .../spark/network/client/TransportClient.java |  9 ++++-
 .../client/TransportClientFactory.java        | 15 ++++++--
 .../client/TransportResponseHandler.java      |  9 +++--
 .../server/TransportChannelHandler.java       | 36 ++++++++++++-------
 4 files changed, 52 insertions(+), 17 deletions(-)

diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
index a0ba223e340a..876fcd846791 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClient.java
@@ -73,10 +73,12 @@ public class TransportClient implements Closeable {
   private final Channel channel;
   private final TransportResponseHandler handler;
   @Nullable private String clientId;
+  private volatile boolean timedOut;
 
   public TransportClient(Channel channel, TransportResponseHandler handler) {
     this.channel = Preconditions.checkNotNull(channel);
     this.handler = Preconditions.checkNotNull(handler);
+    this.timedOut = false;
   }
 
   public Channel getChannel() {
@@ -84,7 +86,7 @@ public Channel getChannel() {
   }
 
   public boolean isActive() {
-    return channel.isOpen() || channel.isActive();
+    return !timedOut && (channel.isOpen() || channel.isActive());
   }
 
   public SocketAddress getSocketAddress() {
@@ -263,6 +265,11 @@ public void onFailure(Throwable e) {
     }
   }
 
+  /** Mark this channel as having timed out. */
+  public void timeOut() {
+    this.timedOut = true;
+  }
+
   @Override
   public void close() {
     // close is a local operation and should finish with milliseconds; timeout just to be safe
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
index 42a4f664e697..659c47160c7b 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
@@ -136,8 +136,19 @@ public TransportClient createClient(String remoteHost, int remotePort) throws IO
     TransportClient cachedClient = clientPool.clients[clientIndex];
 
     if (cachedClient != null && cachedClient.isActive()) {
-      logger.trace("Returning cached connection to {}: {}", address, cachedClient);
-      return cachedClient;
+      // Make sure that the channel will not timeout by updating the last use time of the
+      // handler. Then check that the client is still alive, in case it timed out before
+      // this code was able to update things.
+      TransportChannelHandler handler = cachedClient.getChannel().pipeline()
+        .get(TransportChannelHandler.class);
+      synchronized (handler) {
+        handler.getResponseHandler().updateTimeOfLastRequest();
+      }
+
+      if (cachedClient.isActive()) {
+        logger.trace("Returning cached connection to {}: {}", address, cachedClient);
+        return cachedClient;
+      }
     }
 
     // If we reach here, we don't have an existing connection open. Let's create a new one.
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
index cc88991b588c..be181e066082 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
@@ -71,7 +71,7 @@ public TransportResponseHandler(Channel channel) {
   }
 
   public void addFetchRequest(StreamChunkId streamChunkId, ChunkReceivedCallback callback) {
-    timeOfLastRequestNs.set(System.nanoTime());
+    updateTimeOfLastRequest();
     outstandingFetches.put(streamChunkId, callback);
   }
 
@@ -80,7 +80,7 @@ public void removeFetchRequest(StreamChunkId streamChunkId) {
   }
 
   public void addRpcRequest(long requestId, RpcResponseCallback callback) {
-    timeOfLastRequestNs.set(System.nanoTime());
+    updateTimeOfLastRequest();
     outstandingRpcs.put(requestId, callback);
   }
 
@@ -227,4 +227,9 @@ public long getTimeOfLastRequestNs() {
     return timeOfLastRequestNs.get();
   }
 
+  /** Updates the time of the last request to the current system time. */
+  public void updateTimeOfLastRequest() {
+    timeOfLastRequestNs.set(System.nanoTime());
+  }
+
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
index f8fcd1c3d7d7..29d688a67578 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
@@ -116,20 +116,32 @@ public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exc
       // there are outstanding requests, we also do a secondary consistency check to ensure
       // there's no race between the idle timeout and incrementing the numOutstandingRequests
       // (see SPARK-7003).
-      boolean isActuallyOverdue =
-        System.nanoTime() - responseHandler.getTimeOfLastRequestNs() > requestTimeoutNs;
-      if (e.state() == IdleState.ALL_IDLE && isActuallyOverdue) {
-        if (responseHandler.numOutstandingRequests() > 0) {
-          String address = NettyUtils.getRemoteAddress(ctx.channel());
-          logger.error("Connection to {} has been quiet for {} ms while there are outstanding " +
-            "requests. Assuming connection is dead; please adjust spark.network.timeout if this " +
-            "is wrong.", address, requestTimeoutNs / 1000 / 1000);
-          ctx.close();
-        } else if (closeIdleConnections) {
-          // While CloseIdleConnections is enable, we also close idle connection
-          ctx.close();
+      //
+      // To avoid a race between TransportClientFactory.createClient() and this code which could
+      // result in an inactive client being returned, this needs to run in a synchronized block.
+      synchronized (this) {
+        boolean isActuallyOverdue =
+          System.nanoTime() - responseHandler.getTimeOfLastRequestNs() > requestTimeoutNs;
+        if (e.state() == IdleState.ALL_IDLE && isActuallyOverdue) {
+          if (responseHandler.numOutstandingRequests() > 0) {
+            String address = NettyUtils.getRemoteAddress(ctx.channel());
+            logger.error("Connection to {} has been quiet for {} ms while there are outstanding " +
+              "requests. Assuming connection is dead; please adjust spark.network.timeout if this " +
+              "is wrong.", address, requestTimeoutNs / 1000 / 1000);
+            client.timeOut();
+            ctx.close();
+          } else if (closeIdleConnections) {
+            // While CloseIdleConnections is enable, we also close idle connection
+            client.timeOut();
+            ctx.close();
+          }
         }
       }
     }
   }
+
+  public TransportResponseHandler getResponseHandler() {
+    return responseHandler;
+  }
+
 }

From c2467dadae8ce44010a912ee91c429310f8add65 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Mon, 23 Nov 2015 13:54:19 -0800
Subject: [PATCH 860/896] [SPARK-11140][CORE] Transfer files using network lib
 when using NettyRpcEnv.

This change abstracts the code that serves jars / files to executors so that
each RpcEnv can have its own implementation; the akka version uses the existing
HTTP-based file serving mechanism, while the netty versions uses the new
stream support added to the network lib, which makes file transfers benefit
from the easier security configuration of the network library, and should also
reduce overhead overall.

The change includes a small fix to TransportChannelHandler so that it propagates
user events to downstream handlers.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9530 from vanzin/SPARK-11140.
---
 .../scala/org/apache/spark/SparkContext.scala |   8 +-
 .../scala/org/apache/spark/SparkEnv.scala     |  14 --
 .../scala/org/apache/spark/rpc/RpcEnv.scala   |  46 ++++++
 .../apache/spark/rpc/akka/AkkaRpcEnv.scala    |  60 +++++++-
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 138 ++++++++++++++++--
 .../spark/rpc/netty/NettyStreamManager.scala  |  63 ++++++++
 .../scala/org/apache/spark/util/Utils.scala   |   9 ++
 .../org/apache/spark/rpc/RpcEnvSuite.scala    |  39 ++++-
 .../rpc/netty/NettyRpcHandlerSuite.scala      |  10 +-
 docs/configuration.md                         |   2 +
 docs/security.md                              |   5 +-
 .../launcher/AbstractCommandBuilder.java      |   2 +-
 .../client/TransportClientFactory.java        |   6 +-
 .../server/TransportChannelHandler.java       |   1 +
 14 files changed, 356 insertions(+), 47 deletions(-)
 create mode 100644 core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index af4456c05b0a..b153a7b08e59 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1379,7 +1379,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     }
 
     val key = if (!isLocal && scheme == "file") {
-      env.httpFileServer.addFile(new File(uri.getPath))
+      env.rpcEnv.fileServer.addFile(new File(uri.getPath))
     } else {
       schemeCorrectedPath
     }
@@ -1630,7 +1630,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
       var key = ""
       if (path.contains("\\")) {
         // For local paths with backslashes on Windows, URI throws an exception
-        key = env.httpFileServer.addJar(new File(path))
+        key = env.rpcEnv.fileServer.addJar(new File(path))
       } else {
         val uri = new URI(path)
         key = uri.getScheme match {
@@ -1644,7 +1644,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
               // of the AM to make it show up in the current working directory.
               val fileName = new Path(uri.getPath).getName()
               try {
-                env.httpFileServer.addJar(new File(fileName))
+                env.rpcEnv.fileServer.addJar(new File(fileName))
               } catch {
                 case e: Exception =>
                   // For now just log an error but allow to go through so spark examples work.
@@ -1655,7 +1655,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
               }
             } else {
               try {
-                env.httpFileServer.addJar(new File(uri.getPath))
+                env.rpcEnv.fileServer.addJar(new File(uri.getPath))
               } catch {
                 case exc: FileNotFoundException =>
                   logError(s"Jar not found at $path")
diff --git a/core/src/main/scala/org/apache/spark/SparkEnv.scala b/core/src/main/scala/org/apache/spark/SparkEnv.scala
index 88df27f733f2..84230e32a446 100644
--- a/core/src/main/scala/org/apache/spark/SparkEnv.scala
+++ b/core/src/main/scala/org/apache/spark/SparkEnv.scala
@@ -66,7 +66,6 @@ class SparkEnv (
     val blockTransferService: BlockTransferService,
     val blockManager: BlockManager,
     val securityManager: SecurityManager,
-    val httpFileServer: HttpFileServer,
     val sparkFilesDir: String,
     val metricsSystem: MetricsSystem,
     val memoryManager: MemoryManager,
@@ -91,7 +90,6 @@ class SparkEnv (
     if (!isStopped) {
       isStopped = true
       pythonWorkers.values.foreach(_.stop())
-      Option(httpFileServer).foreach(_.stop())
       mapOutputTracker.stop()
       shuffleManager.stop()
       broadcastManager.stop()
@@ -367,17 +365,6 @@ object SparkEnv extends Logging {
 
     val cacheManager = new CacheManager(blockManager)
 
-    val httpFileServer =
-      if (isDriver) {
-        val fileServerPort = conf.getInt("spark.fileserver.port", 0)
-        val server = new HttpFileServer(conf, securityManager, fileServerPort)
-        server.initialize()
-        conf.set("spark.fileserver.uri", server.serverUri)
-        server
-      } else {
-        null
-      }
-
     val metricsSystem = if (isDriver) {
       // Don't start metrics system right now for Driver.
       // We need to wait for the task scheduler to give us an app ID.
@@ -422,7 +409,6 @@ object SparkEnv extends Logging {
       blockTransferService,
       blockManager,
       securityManager,
-      httpFileServer,
       sparkFilesDir,
       metricsSystem,
       memoryManager,
diff --git a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
index a560fd10cdf7..3d7d281b0dd6 100644
--- a/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/RpcEnv.scala
@@ -17,6 +17,9 @@
 
 package org.apache.spark.rpc
 
+import java.io.File
+import java.nio.channels.ReadableByteChannel
+
 import scala.concurrent.Future
 
 import org.apache.spark.{SecurityManager, SparkConf}
@@ -132,8 +135,51 @@ private[spark] abstract class RpcEnv(conf: SparkConf) {
    * that contains [[RpcEndpointRef]]s, the deserialization codes should be wrapped by this method.
    */
   def deserialize[T](deserializationAction: () => T): T
+
+  /**
+   * Return the instance of the file server used to serve files. This may be `null` if the
+   * RpcEnv is not operating in server mode.
+   */
+  def fileServer: RpcEnvFileServer
+
+  /**
+   * Open a channel to download a file from the given URI. If the URIs returned by the
+   * RpcEnvFileServer use the "spark" scheme, this method will be called by the Utils class to
+   * retrieve the files.
+   *
+   * @param uri URI with location of the file.
+   */
+  def openChannel(uri: String): ReadableByteChannel
+
 }
 
+/**
+ * A server used by the RpcEnv to server files to other processes owned by the application.
+ *
+ * The file server can return URIs handled by common libraries (such as "http" or "hdfs"), or
+ * it can return "spark" URIs which will be handled by `RpcEnv#fetchFile`.
+ */
+private[spark] trait RpcEnvFileServer {
+
+  /**
+   * Adds a file to be served by this RpcEnv. This is used to serve files from the driver
+   * to executors when they're stored on the driver's local file system.
+   *
+   * @param file Local file to serve.
+   * @return A URI for the location of the file.
+   */
+  def addFile(file: File): String
+
+  /**
+   * Adds a jar to be served by this RpcEnv. Similar to `addFile` but for jars added using
+   * `SparkContext.addJar`.
+   *
+   * @param file Local file to serve.
+   * @return A URI for the location of the file.
+   */
+  def addJar(file: File): String
+
+}
 
 private[spark] case class RpcEnvConfig(
     conf: SparkConf,
diff --git a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
index 059a7e10ec12..94dbec593c31 100644
--- a/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/akka/AkkaRpcEnv.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.rpc.akka
 
+import java.io.File
+import java.nio.channels.ReadableByteChannel
 import java.util.concurrent.ConcurrentHashMap
 
 import scala.concurrent.Future
@@ -30,7 +32,7 @@ import akka.pattern.{ask => akkaAsk}
 import akka.remote.{AssociationEvent, AssociatedEvent, DisassociatedEvent, AssociationErrorEvent}
 import akka.serialization.JavaSerializer
 
-import org.apache.spark.{SparkException, Logging, SparkConf}
+import org.apache.spark.{HttpFileServer, Logging, SecurityManager, SparkConf, SparkException}
 import org.apache.spark.rpc._
 import org.apache.spark.util.{ActorLogReceive, AkkaUtils, ThreadUtils}
 
@@ -41,7 +43,10 @@ import org.apache.spark.util.{ActorLogReceive, AkkaUtils, ThreadUtils}
  * remove Akka from the dependencies.
  */
 private[spark] class AkkaRpcEnv private[akka] (
-    val actorSystem: ActorSystem, conf: SparkConf, boundPort: Int)
+    val actorSystem: ActorSystem,
+    val securityManager: SecurityManager,
+    conf: SparkConf,
+    boundPort: Int)
   extends RpcEnv(conf) with Logging {
 
   private val defaultAddress: RpcAddress = {
@@ -64,6 +69,8 @@ private[spark] class AkkaRpcEnv private[akka] (
    */
   private val refToEndpoint = new ConcurrentHashMap[RpcEndpointRef, RpcEndpoint]()
 
+  private val _fileServer = new AkkaFileServer(conf, securityManager)
+
   private def registerEndpoint(endpoint: RpcEndpoint, endpointRef: RpcEndpointRef): Unit = {
     endpointToRef.put(endpoint, endpointRef)
     refToEndpoint.put(endpointRef, endpoint)
@@ -223,6 +230,7 @@ private[spark] class AkkaRpcEnv private[akka] (
 
   override def shutdown(): Unit = {
     actorSystem.shutdown()
+    _fileServer.shutdown()
   }
 
   override def stop(endpoint: RpcEndpointRef): Unit = {
@@ -241,6 +249,52 @@ private[spark] class AkkaRpcEnv private[akka] (
       deserializationAction()
     }
   }
+
+  override def openChannel(uri: String): ReadableByteChannel = {
+    throw new UnsupportedOperationException(
+      "AkkaRpcEnv's files should be retrieved using an HTTP client.")
+  }
+
+  override def fileServer: RpcEnvFileServer = _fileServer
+
+}
+
+private[akka] class AkkaFileServer(
+    conf: SparkConf,
+    securityManager: SecurityManager) extends RpcEnvFileServer {
+
+  @volatile private var httpFileServer: HttpFileServer = _
+
+  override def addFile(file: File): String = {
+    getFileServer().addFile(file)
+  }
+
+  override def addJar(file: File): String = {
+    getFileServer().addJar(file)
+  }
+
+  def shutdown(): Unit = {
+    if (httpFileServer != null) {
+      httpFileServer.stop()
+    }
+  }
+
+  private def getFileServer(): HttpFileServer = {
+    if (httpFileServer == null) synchronized {
+      if (httpFileServer == null) {
+        httpFileServer = startFileServer()
+      }
+    }
+    httpFileServer
+  }
+
+  private def startFileServer(): HttpFileServer = {
+    val fileServerPort = conf.getInt("spark.fileserver.port", 0)
+    val server = new HttpFileServer(conf, securityManager, fileServerPort)
+    server.initialize()
+    server
+  }
+
 }
 
 private[spark] class AkkaRpcEnvFactory extends RpcEnvFactory {
@@ -249,7 +303,7 @@ private[spark] class AkkaRpcEnvFactory extends RpcEnvFactory {
     val (actorSystem, boundPort) = AkkaUtils.createActorSystem(
       config.name, config.host, config.port, config.conf, config.securityManager)
     actorSystem.actorOf(Props(classOf[ErrorMonitor]), "ErrorMonitor")
-    new AkkaRpcEnv(actorSystem, config.conf, boundPort)
+    new AkkaRpcEnv(actorSystem, config.securityManager, config.conf, boundPort)
   }
 }
 
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 3ce359868039..68701f609f77 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -20,6 +20,7 @@ import java.io._
 import java.lang.{Boolean => JBoolean}
 import java.net.{InetSocketAddress, URI}
 import java.nio.ByteBuffer
+import java.nio.channels.{Pipe, ReadableByteChannel, WritableByteChannel}
 import java.util.concurrent._
 import java.util.concurrent.atomic.AtomicBoolean
 import javax.annotation.Nullable
@@ -45,27 +46,39 @@ private[netty] class NettyRpcEnv(
     host: String,
     securityManager: SecurityManager) extends RpcEnv(conf) with Logging {
 
-  private val transportConf = SparkTransportConf.fromSparkConf(
+  private[netty] val transportConf = SparkTransportConf.fromSparkConf(
     conf.clone.set("spark.rpc.io.numConnectionsPerPeer", "1"),
     "rpc",
     conf.getInt("spark.rpc.io.threads", 0))
 
   private val dispatcher: Dispatcher = new Dispatcher(this)
 
+  private val streamManager = new NettyStreamManager(this)
+
   private val transportContext = new TransportContext(transportConf,
-    new NettyRpcHandler(dispatcher, this))
+    new NettyRpcHandler(dispatcher, this, streamManager))
 
-  private val clientFactory = {
-    val bootstraps: java.util.List[TransportClientBootstrap] =
-      if (securityManager.isAuthenticationEnabled()) {
-        java.util.Arrays.asList(new SaslClientBootstrap(transportConf, "", securityManager,
-          securityManager.isSaslEncryptionEnabled()))
-      } else {
-        java.util.Collections.emptyList[TransportClientBootstrap]
-      }
-    transportContext.createClientFactory(bootstraps)
+  private def createClientBootstraps(): java.util.List[TransportClientBootstrap] = {
+    if (securityManager.isAuthenticationEnabled()) {
+      java.util.Arrays.asList(new SaslClientBootstrap(transportConf, "", securityManager,
+        securityManager.isSaslEncryptionEnabled()))
+    } else {
+      java.util.Collections.emptyList[TransportClientBootstrap]
+    }
   }
 
+  private val clientFactory = transportContext.createClientFactory(createClientBootstraps())
+
+  /**
+   * A separate client factory for file downloads. This avoids using the same RPC handler as
+   * the main RPC context, so that events caused by these clients are kept isolated from the
+   * main RPC traffic.
+   *
+   * It also allows for different configuration of certain properties, such as the number of
+   * connections per peer.
+   */
+  @volatile private var fileDownloadFactory: TransportClientFactory = _
+
   val timeoutScheduler = ThreadUtils.newDaemonSingleThreadScheduledExecutor("netty-rpc-env-timeout")
 
   // Because TransportClientFactory.createClient is blocking, we need to run it in this thread pool
@@ -292,6 +305,9 @@ private[netty] class NettyRpcEnv(
     if (clientConnectionExecutor != null) {
       clientConnectionExecutor.shutdownNow()
     }
+    if (fileDownloadFactory != null) {
+      fileDownloadFactory.close()
+    }
   }
 
   override def deserialize[T](deserializationAction: () => T): T = {
@@ -300,6 +316,96 @@ private[netty] class NettyRpcEnv(
     }
   }
 
+  override def fileServer: RpcEnvFileServer = streamManager
+
+  override def openChannel(uri: String): ReadableByteChannel = {
+    val parsedUri = new URI(uri)
+    require(parsedUri.getHost() != null, "Host name must be defined.")
+    require(parsedUri.getPort() > 0, "Port must be defined.")
+    require(parsedUri.getPath() != null && parsedUri.getPath().nonEmpty, "Path must be defined.")
+
+    val pipe = Pipe.open()
+    val source = new FileDownloadChannel(pipe.source())
+    try {
+      val client = downloadClient(parsedUri.getHost(), parsedUri.getPort())
+      val callback = new FileDownloadCallback(pipe.sink(), source, client)
+      client.stream(parsedUri.getPath(), callback)
+    } catch {
+      case e: Exception =>
+        pipe.sink().close()
+        source.close()
+        throw e
+    }
+
+    source
+  }
+
+  private def downloadClient(host: String, port: Int): TransportClient = {
+    if (fileDownloadFactory == null) synchronized {
+      if (fileDownloadFactory == null) {
+        val module = "files"
+        val prefix = "spark.rpc.io."
+        val clone = conf.clone()
+
+        // Copy any RPC configuration that is not overridden in the spark.files namespace.
+        conf.getAll.foreach { case (key, value) =>
+          if (key.startsWith(prefix)) {
+            val opt = key.substring(prefix.length())
+            clone.setIfMissing(s"spark.$module.io.$opt", value)
+          }
+        }
+
+        val ioThreads = clone.getInt("spark.files.io.threads", 1)
+        val downloadConf = SparkTransportConf.fromSparkConf(clone, module, ioThreads)
+        val downloadContext = new TransportContext(downloadConf, new NoOpRpcHandler(), true)
+        fileDownloadFactory = downloadContext.createClientFactory(createClientBootstraps())
+      }
+    }
+    fileDownloadFactory.createClient(host, port)
+  }
+
+  private class FileDownloadChannel(source: ReadableByteChannel) extends ReadableByteChannel {
+
+    @volatile private var error: Throwable = _
+
+    def setError(e: Throwable): Unit = error = e
+
+    override def read(dst: ByteBuffer): Int = {
+      if (error != null) {
+        throw error
+      }
+      source.read(dst)
+    }
+
+    override def close(): Unit = source.close()
+
+    override def isOpen(): Boolean = source.isOpen()
+
+  }
+
+  private class FileDownloadCallback(
+      sink: WritableByteChannel,
+      source: FileDownloadChannel,
+      client: TransportClient) extends StreamCallback {
+
+    override def onData(streamId: String, buf: ByteBuffer): Unit = {
+      while (buf.remaining() > 0) {
+        sink.write(buf)
+      }
+    }
+
+    override def onComplete(streamId: String): Unit = {
+      sink.close()
+    }
+
+    override def onFailure(streamId: String, cause: Throwable): Unit = {
+      logError(s"Error downloading stream $streamId.", cause)
+      source.setError(cause)
+      sink.close()
+    }
+
+  }
+
 }
 
 private[netty] object NettyRpcEnv extends Logging {
@@ -420,7 +526,7 @@ private[netty] class NettyRpcEndpointRef(
 
   override def toString: String = s"NettyRpcEndpointRef(${_address})"
 
-  def toURI: URI = new URI(s"spark://${_address}")
+  def toURI: URI = new URI(_address.toString)
 
   final override def equals(that: Any): Boolean = that match {
     case other: NettyRpcEndpointRef => _address == other._address
@@ -471,7 +577,9 @@ private[netty] case class RpcFailure(e: Throwable)
  * with different `RpcAddress` information).
  */
 private[netty] class NettyRpcHandler(
-    dispatcher: Dispatcher, nettyEnv: NettyRpcEnv) extends RpcHandler with Logging {
+    dispatcher: Dispatcher,
+    nettyEnv: NettyRpcEnv,
+    streamManager: StreamManager) extends RpcHandler with Logging {
 
   // TODO: Can we add connection callback (channel registered) to the underlying framework?
   // A variable to track whether we should dispatch the RemoteProcessConnected message.
@@ -498,7 +606,7 @@ private[netty] class NettyRpcHandler(
     dispatcher.postRemoteMessage(messageToDispatch, callback)
   }
 
-  override def getStreamManager: StreamManager = new OneForOneStreamManager
+  override def getStreamManager: StreamManager = streamManager
 
   override def exceptionCaught(cause: Throwable, client: TransportClient): Unit = {
     val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
@@ -516,8 +624,8 @@ private[netty] class NettyRpcHandler(
   override def connectionTerminated(client: TransportClient): Unit = {
     val addr = client.getChannel.remoteAddress().asInstanceOf[InetSocketAddress]
     if (addr != null) {
-      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
       clients.remove(client)
+      val clientAddr = RpcAddress(addr.getHostName, addr.getPort)
       nettyEnv.removeOutbox(clientAddr)
       dispatcher.postToAll(RemoteProcessDisconnected(clientAddr))
     } else {
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala
new file mode 100644
index 000000000000..eb1d2604fb23
--- /dev/null
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.spark.rpc.netty
+
+import java.io.File
+import java.util.concurrent.ConcurrentHashMap
+
+import org.apache.spark.network.buffer.{FileSegmentManagedBuffer, ManagedBuffer}
+import org.apache.spark.network.server.StreamManager
+import org.apache.spark.rpc.RpcEnvFileServer
+
+/**
+ * StreamManager implementation for serving files from a NettyRpcEnv.
+ */
+private[netty] class NettyStreamManager(rpcEnv: NettyRpcEnv)
+  extends StreamManager with RpcEnvFileServer {
+
+  private val files = new ConcurrentHashMap[String, File]()
+  private val jars = new ConcurrentHashMap[String, File]()
+
+  override def getChunk(streamId: Long, chunkIndex: Int): ManagedBuffer = {
+    throw new UnsupportedOperationException()
+  }
+
+  override def openStream(streamId: String): ManagedBuffer = {
+    val Array(ftype, fname) = streamId.stripPrefix("/").split("/", 2)
+    val file = ftype match {
+      case "files" => files.get(fname)
+      case "jars" => jars.get(fname)
+      case _ => throw new IllegalArgumentException(s"Invalid file type: $ftype")
+    }
+
+    require(file != null, s"File not found: $streamId")
+    new FileSegmentManagedBuffer(rpcEnv.transportConf, file, 0, file.length())
+  }
+
+  override def addFile(file: File): String = {
+    require(files.putIfAbsent(file.getName(), file) == null,
+      s"File ${file.getName()} already registered.")
+    s"${rpcEnv.address.toSparkURL}/files/${file.getName()}"
+  }
+
+  override def addJar(file: File): String = {
+    require(jars.putIfAbsent(file.getName(), file) == null,
+      s"JAR ${file.getName()} already registered.")
+    s"${rpcEnv.address.toSparkURL}/jars/${file.getName()}"
+  }
+
+}
diff --git a/core/src/main/scala/org/apache/spark/util/Utils.scala b/core/src/main/scala/org/apache/spark/util/Utils.scala
index 1b3acb8ef7f5..af632349c9ca 100644
--- a/core/src/main/scala/org/apache/spark/util/Utils.scala
+++ b/core/src/main/scala/org/apache/spark/util/Utils.scala
@@ -21,6 +21,7 @@ import java.io._
 import java.lang.management.ManagementFactory
 import java.net._
 import java.nio.ByteBuffer
+import java.nio.channels.Channels
 import java.util.concurrent._
 import java.util.{Locale, Properties, Random, UUID}
 import javax.net.ssl.HttpsURLConnection
@@ -535,6 +536,14 @@ private[spark] object Utils extends Logging {
     val uri = new URI(url)
     val fileOverwrite = conf.getBoolean("spark.files.overwrite", defaultValue = false)
     Option(uri.getScheme).getOrElse("file") match {
+      case "spark" =>
+        if (SparkEnv.get == null) {
+          throw new IllegalStateException(
+            "Cannot retrieve files with 'spark' scheme without an active SparkEnv.")
+        }
+        val source = SparkEnv.get.rpcEnv.openChannel(url)
+        val is = Channels.newInputStream(source)
+        downloadFile(url, is, targetFile, fileOverwrite)
       case "http" | "https" | "ftp" =>
         var uc: URLConnection = null
         if (securityMgr.isAuthenticationEnabled()) {
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 2f55006420ce..2b664c6313ef 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -17,7 +17,9 @@
 
 package org.apache.spark.rpc
 
-import java.io.NotSerializableException
+import java.io.{File, NotSerializableException}
+import java.util.UUID
+import java.nio.charset.StandardCharsets.UTF_8
 import java.util.concurrent.{TimeUnit, CountDownLatch, TimeoutException}
 
 import scala.collection.mutable
@@ -25,10 +27,14 @@ import scala.concurrent.Await
 import scala.concurrent.duration._
 import scala.language.postfixOps
 
+import com.google.common.io.Files
+import org.mockito.Mockito.{mock, when}
 import org.scalatest.BeforeAndAfterAll
 import org.scalatest.concurrent.Eventually._
 
-import org.apache.spark.{SparkConf, SparkException, SparkFunSuite}
+import org.apache.spark.{SecurityManager, SparkConf, SparkEnv, SparkException, SparkFunSuite}
+import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.util.Utils
 
 /**
  * Common tests for an RpcEnv implementation.
@@ -40,12 +46,17 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
   override def beforeAll(): Unit = {
     val conf = new SparkConf()
     env = createRpcEnv(conf, "local", 0)
+
+    val sparkEnv = mock(classOf[SparkEnv])
+    when(sparkEnv.rpcEnv).thenReturn(env)
+    SparkEnv.set(sparkEnv)
   }
 
   override def afterAll(): Unit = {
     if (env != null) {
       env.shutdown()
     }
+    SparkEnv.set(null)
   }
 
   def createRpcEnv(conf: SparkConf, name: String, port: Int, clientMode: Boolean = false): RpcEnv
@@ -713,6 +724,30 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     assert(shortTimeout.timeoutProp.r.findAllIn(reply4).length === 1)
   }
 
+  test("file server") {
+    val conf = new SparkConf()
+    val tempDir = Utils.createTempDir()
+    val file = new File(tempDir, "file")
+    Files.write(UUID.randomUUID().toString(), file, UTF_8)
+    val jar = new File(tempDir, "jar")
+    Files.write(UUID.randomUUID().toString(), jar, UTF_8)
+
+    val fileUri = env.fileServer.addFile(file)
+    val jarUri = env.fileServer.addJar(jar)
+
+    val destDir = Utils.createTempDir()
+    val destFile = new File(destDir, file.getName())
+    val destJar = new File(destDir, jar.getName())
+
+    val sm = new SecurityManager(conf)
+    val hc = SparkHadoopUtil.get.conf
+    Utils.fetchFile(fileUri, destDir, conf, sm, hc, 0L, false)
+    Utils.fetchFile(jarUri, destDir, conf, sm, hc, 0L, false)
+
+    assert(Files.equal(file, destFile))
+    assert(Files.equal(jar, destJar))
+  }
+
 }
 
 class UnserializableClass
diff --git a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
index f9d8e80c98b6..ccca795683da 100644
--- a/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/netty/NettyRpcHandlerSuite.scala
@@ -25,17 +25,19 @@ import org.mockito.Matchers._
 
 import org.apache.spark.SparkFunSuite
 import org.apache.spark.network.client.{TransportResponseHandler, TransportClient}
+import org.apache.spark.network.server.StreamManager
 import org.apache.spark.rpc._
 
 class NettyRpcHandlerSuite extends SparkFunSuite {
 
   val env = mock(classOf[NettyRpcEnv])
-  when(env.deserialize(any(classOf[TransportClient]), any(classOf[Array[Byte]]))(any())).
-    thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
+  val sm = mock(classOf[StreamManager])
+  when(env.deserialize(any(classOf[TransportClient]), any(classOf[Array[Byte]]))(any()))
+    .thenReturn(RequestMessage(RpcAddress("localhost", 12345), null, null, false))
 
   test("receive") {
     val dispatcher = mock(classOf[Dispatcher])
-    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env, sm)
 
     val channel = mock(classOf[Channel])
     val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
@@ -47,7 +49,7 @@ class NettyRpcHandlerSuite extends SparkFunSuite {
 
   test("connectionTerminated") {
     val dispatcher = mock(classOf[Dispatcher])
-    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env)
+    val nettyRpcHandler = new NettyRpcHandler(dispatcher, env, sm)
 
     val channel = mock(classOf[Channel])
     val client = new TransportClient(channel, mock(classOf[TransportResponseHandler]))
diff --git a/docs/configuration.md b/docs/configuration.md
index c496146e3ed6..4de202d7f763 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -1020,6 +1020,7 @@ Apart from these, the following properties are also available, and may be useful
   <td>(random)</td>
   <td>
     Port for the executor to listen on. This is used for communicating with the driver.
+    This is only relevant when using the Akka RPC backend.
   </td>
 </tr>
 <tr>
@@ -1027,6 +1028,7 @@ Apart from these, the following properties are also available, and may be useful
   <td>(random)</td>
   <td>
     Port for the driver's HTTP file server to listen on.
+    This is only relevant when using the Akka RPC backend.
   </td>
 </tr>
 <tr>
diff --git a/docs/security.md b/docs/security.md
index 177109415180..e1af221d446b 100644
--- a/docs/security.md
+++ b/docs/security.md
@@ -149,7 +149,8 @@ configure those ports.
     <td>(random)</td>
     <td>Schedule tasks</td>
     <td><code>spark.executor.port</code></td>
-    <td>Akka-based. Set to "0" to choose a port randomly.</td>
+    <td>Akka-based. Set to "0" to choose a port randomly. Only used if Akka RPC backend is
+    configured.</td>
   </tr>
   <tr>
     <td>Executor</td>
@@ -157,7 +158,7 @@ configure those ports.
     <td>(random)</td>
     <td>File server for files and jars</td>
     <td><code>spark.fileserver.port</code></td>
-    <td>Jetty-based</td>
+    <td>Jetty-based. Only used if Akka RPC backend is configured.</td>
   </tr>
   <tr>
     <td>Executor</td>
diff --git a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
index 3ee6bd92e47f..55fe156cf665 100644
--- a/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
+++ b/launcher/src/main/java/org/apache/spark/launcher/AbstractCommandBuilder.java
@@ -148,7 +148,7 @@ List<String> buildClassPath(String appClassPath) throws IOException {
       String scala = getScalaVersion();
       List<String> projects = Arrays.asList("core", "repl", "mllib", "bagel", "graphx",
         "streaming", "tools", "sql/catalyst", "sql/core", "sql/hive", "sql/hive-thriftserver",
-        "yarn", "launcher");
+        "yarn", "launcher", "network/common", "network/shuffle", "network/yarn");
       if (prependClasses) {
         if (!isTesting) {
           System.err.println(
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
index 659c47160c7b..61bafc838004 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportClientFactory.java
@@ -170,8 +170,10 @@ public TransportClient createClient(String remoteHost, int remotePort) throws IO
   }
 
   /**
-   * Create a completely new {@link TransportClient} to the given remote host / port
-   * But this connection is not pooled.
+   * Create a completely new {@link TransportClient} to the given remote host / port.
+   * This connection is not pooled.
+   *
+   * As with {@link #createClient(String, int)}, this method is blocking.
    */
   public TransportClient createUnmanagedClient(String remoteHost, int remotePort)
       throws IOException {
diff --git a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
index 29d688a67578..3164e0067903 100644
--- a/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/server/TransportChannelHandler.java
@@ -138,6 +138,7 @@ public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exc
         }
       }
     }
+    ctx.fireUserEventTriggered(evt);
   }
 
   public TransportResponseHandler getResponseHandler() {

From 9db5f601facfdaba6e4333a6b2d2e4a9f009c788 Mon Sep 17 00:00:00 2001
From: Josh Rosen <joshrosen@databricks.com>
Date: Mon, 23 Nov 2015 16:33:26 -0800
Subject: [PATCH 861/896] [SPARK-9866][SQL] Speed up VersionsSuite by using
 persistent Ivy cache

This patch attempts to speed up VersionsSuite by storing fetched Hive JARs in an Ivy cache that persists across tests runs. If `SPARK_VERSIONS_SUITE_IVY_PATH` is set, that path will be used for the cache; if it is not set, VersionsSuite will create a temporary Ivy cache which is deleted after the test completes.

Author: Josh Rosen <joshrosen@databricks.com>

Closes #9624 from JoshRosen/SPARK-9866.
---
 .../apache/spark/sql/hive/client/VersionsSuite.scala   | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
index c6d034a23a1c..7bc13bc60d30 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/client/VersionsSuite.scala
@@ -36,10 +36,12 @@ import org.apache.spark.util.Utils
 @ExtendedHiveTest
 class VersionsSuite extends SparkFunSuite with Logging {
 
-  // Do not use a temp path here to speed up subsequent executions of the unit test during
-  // development.
-  private val ivyPath = Some(
-    new File(sys.props("java.io.tmpdir"), "hive-ivy-cache").getAbsolutePath())
+  // In order to speed up test execution during development or in Jenkins, you can specify the path
+  // of an existing Ivy cache:
+  private val ivyPath: Option[String] = {
+    sys.env.get("SPARK_VERSIONS_SUITE_IVY_PATH").orElse(
+      Some(new File(sys.props("java.io.tmpdir"), "hive-ivy-cache").getAbsolutePath))
+  }
 
   private def buildConf() = {
     lazy val warehousePath = Utils.createTempDir()

From 105745645b12afbbc2a350518cb5853a88944183 Mon Sep 17 00:00:00 2001
From: Bryan Cutler <bjcutler@us.ibm.com>
Date: Mon, 23 Nov 2015 17:11:51 -0800
Subject: [PATCH 862/896] [SPARK-10560][PYSPARK][MLLIB][DOCS] Make
 StreamingLogisticRegressionWithSGD Python API equal to Scala one

This is to bring the API documentation of StreamingLogisticReressionWithSGD and StreamingLinearRegressionWithSGC in line with the Scala versions.

-Fixed the algorithm descriptions
-Added default values to parameter descriptions
-Changed StreamingLogisticRegressionWithSGD regParam to default to 0, as in the Scala version

Author: Bryan Cutler <bjcutler@us.ibm.com>

Closes #9141 from BryanCutler/StreamingLogisticRegressionWithSGD-python-api-sync.
---
 python/pyspark/mllib/classification.py | 37 +++++++++++++++++---------
 python/pyspark/mllib/regression.py     | 32 ++++++++++++++--------
 2 files changed, 46 insertions(+), 23 deletions(-)

diff --git a/python/pyspark/mllib/classification.py b/python/pyspark/mllib/classification.py
index aab4015ba80f..9e6f17ef6e94 100644
--- a/python/pyspark/mllib/classification.py
+++ b/python/pyspark/mllib/classification.py
@@ -652,21 +652,34 @@ def train(cls, data, lambda_=1.0):
 @inherit_doc
 class StreamingLogisticRegressionWithSGD(StreamingLinearAlgorithm):
     """
-    Run LogisticRegression with SGD on a batch of data.
-
-    The weights obtained at the end of training a stream are used as initial
-    weights for the next batch.
-
-    :param stepSize: Step size for each iteration of gradient descent.
-    :param numIterations: Number of iterations run for each batch of data.
-    :param miniBatchFraction: Fraction of data on which SGD is run for each
-                              iteration.
-    :param regParam: L2 Regularization parameter.
-    :param convergenceTol: A condition which decides iteration termination.
+    Train or predict a logistic regression model on streaming data. Training uses
+    Stochastic Gradient Descent to update the model based on each new batch of
+    incoming data from a DStream.
+
+    Each batch of data is assumed to be an RDD of LabeledPoints.
+    The number of data points per batch can vary, but the number
+    of features must be constant. An initial weight
+    vector must be provided.
+
+    :param stepSize:
+      Step size for each iteration of gradient descent.
+      (default: 0.1)
+    :param numIterations:
+      Number of iterations run for each batch of data.
+      (default: 50)
+    :param miniBatchFraction:
+      Fraction of each batch of data to use for updates.
+      (default: 1.0)
+    :param regParam:
+      L2 Regularization parameter.
+      (default: 0.0)
+    :param convergenceTol:
+      Value used to determine when to terminate iterations.
+      (default: 0.001)
 
     .. versionadded:: 1.5.0
     """
-    def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, regParam=0.01,
+    def __init__(self, stepSize=0.1, numIterations=50, miniBatchFraction=1.0, regParam=0.0,
                  convergenceTol=0.001):
         self.stepSize = stepSize
         self.numIterations = numIterations
diff --git a/python/pyspark/mllib/regression.py b/python/pyspark/mllib/regression.py
index 6f00d1df209c..13b3397501c0 100644
--- a/python/pyspark/mllib/regression.py
+++ b/python/pyspark/mllib/regression.py
@@ -734,17 +734,27 @@ def predictOnValues(self, dstream):
 @inherit_doc
 class StreamingLinearRegressionWithSGD(StreamingLinearAlgorithm):
     """
-    Run LinearRegression with SGD on a batch of data.
-
-    The problem minimized is (1 / n_samples) * (y - weights'X)**2.
-    After training on a batch of data, the weights obtained at the end of
-    training are used as initial weights for the next batch.
-
-    :param stepSize: Step size for each iteration of gradient descent.
-    :param numIterations: Total number of iterations run.
-    :param miniBatchFraction: Fraction of data on which SGD is run for each
-                              iteration.
-    :param convergenceTol: A condition which decides iteration termination.
+    Train or predict a linear regression model on streaming data. Training uses
+    Stochastic Gradient Descent to update the model based on each new batch of
+    incoming data from a DStream (see `LinearRegressionWithSGD` for model equation).
+
+    Each batch of data is assumed to be an RDD of LabeledPoints.
+    The number of data points per batch can vary, but the number
+    of features must be constant. An initial weight
+    vector must be provided.
+
+    :param stepSize:
+      Step size for each iteration of gradient descent.
+      (default: 0.1)
+    :param numIterations:
+      Number of iterations run for each batch of data.
+      (default: 50)
+    :param miniBatchFraction:
+      Fraction of each batch of data to use for updates.
+      (default: 1.0)
+    :param convergenceTol:
+      Value used to determine when to terminate iterations.
+      (default: 0.001)
 
     .. versionadded:: 1.5.0
     """

From 026ea2eab1f3cde270e8a6391d002915f3e1c6e5 Mon Sep 17 00:00:00 2001
From: Stephen Samuel <sam@sksamuel.com>
Date: Mon, 23 Nov 2015 19:52:12 -0800
Subject: [PATCH 863/896] Updated sql programming guide to include jdbc fetch
 size

Author: Stephen Samuel <sam@sksamuel.com>

Closes #9377 from sksamuel/master.
---
 docs/sql-programming-guide.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/docs/sql-programming-guide.md b/docs/sql-programming-guide.md
index e347754055e7..d7b205c2fa0d 100644
--- a/docs/sql-programming-guide.md
+++ b/docs/sql-programming-guide.md
@@ -1820,6 +1820,7 @@ the Data Sources API.  The following options are supported:
       register itself with the JDBC subsystem.
     </td>
   </tr>
+  
   <tr>
     <td><code>partitionColumn, lowerBound, upperBound, numPartitions</code></td>
     <td>
@@ -1831,6 +1832,13 @@ the Data Sources API.  The following options are supported:
       partitioned and returned.
     </td>
   </tr>
+  
+  <tr>
+    <td><code>fetchSize</code></td>
+    <td>
+      The JDBC fetch size, which determines how many rows to fetch per round trip. This can help performance on JDBC drivers which default to low fetch size (eg. Oracle with 10 rows).
+    </td>
+  </tr>
 </table>
 
 <div class="codetabs">

From 8d57524662fad4a0760f3bc924e690c2a110e7f7 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Mon, 23 Nov 2015 22:22:15 -0800
Subject: [PATCH 864/896] [SPARK-11933][SQL] Rename mapGroup -> mapGroups and
 flatMapGroup -> flatMapGroups.

Based on feedback from Matei, this is more consistent with mapPartitions in Spark.

Also addresses some of the cleanups from a previous commit that renames the type variables.

Author: Reynold Xin <rxin@databricks.com>

Closes #9919 from rxin/SPARK-11933.
---
 ...nction.java => FlatMapGroupsFunction.java} |  2 +-
 ...upFunction.java => MapGroupsFunction.java} |  2 +-
 .../org/apache/spark/sql/GroupedDataset.scala | 36 +++++++++----------
 .../apache/spark/sql/JavaDatasetSuite.java    | 10 +++---
 .../spark/sql/DatasetPrimitiveSuite.scala     |  4 +--
 .../org/apache/spark/sql/DatasetSuite.scala   | 12 +++----
 6 files changed, 33 insertions(+), 33 deletions(-)
 rename core/src/main/java/org/apache/spark/api/java/function/{FlatMapGroupFunction.java => FlatMapGroupsFunction.java} (93%)
 rename core/src/main/java/org/apache/spark/api/java/function/{MapGroupFunction.java => MapGroupsFunction.java} (93%)

diff --git a/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupsFunction.java
similarity index 93%
rename from core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java
rename to core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupsFunction.java
index 18a2d733ca70..d7a80e7b129b 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupFunction.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/FlatMapGroupsFunction.java
@@ -23,6 +23,6 @@
 /**
  * A function that returns zero or more output records from each grouping key and its values.
  */
-public interface FlatMapGroupFunction<K, V, R> extends Serializable {
+public interface FlatMapGroupsFunction<K, V, R> extends Serializable {
   Iterable<R> call(K key, Iterator<V> values) throws Exception;
 }
diff --git a/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java b/core/src/main/java/org/apache/spark/api/java/function/MapGroupsFunction.java
similarity index 93%
rename from core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
rename to core/src/main/java/org/apache/spark/api/java/function/MapGroupsFunction.java
index 4f3f222e064b..faa59eabc8b4 100644
--- a/core/src/main/java/org/apache/spark/api/java/function/MapGroupFunction.java
+++ b/core/src/main/java/org/apache/spark/api/java/function/MapGroupsFunction.java
@@ -23,6 +23,6 @@
 /**
  * Base interface for a map function used in GroupedDataset's mapGroup function.
  */
-public interface MapGroupFunction<K, V, R> extends Serializable {
+public interface MapGroupsFunction<K, V, R> extends Serializable {
   R call(K key, Iterator<V> values) throws Exception;
 }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 7f43ce16901b..793a86b13290 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -43,7 +43,7 @@ import org.apache.spark.sql.expressions.Aggregator
 @Experimental
 class GroupedDataset[K, V] private[sql](
     kEncoder: Encoder[K],
-    tEncoder: Encoder[V],
+    vEncoder: Encoder[V],
     val queryExecution: QueryExecution,
     private val dataAttributes: Seq[Attribute],
     private val groupingAttributes: Seq[Attribute]) extends Serializable {
@@ -53,12 +53,12 @@ class GroupedDataset[K, V] private[sql](
   // queryexecution.
 
   private implicit val unresolvedKEncoder = encoderFor(kEncoder)
-  private implicit val unresolvedTEncoder = encoderFor(tEncoder)
+  private implicit val unresolvedVEncoder = encoderFor(vEncoder)
 
   private val resolvedKEncoder =
     unresolvedKEncoder.resolve(groupingAttributes, OuterScopes.outerScopes)
-  private val resolvedTEncoder =
-    unresolvedTEncoder.resolve(dataAttributes, OuterScopes.outerScopes)
+  private val resolvedVEncoder =
+    unresolvedVEncoder.resolve(dataAttributes, OuterScopes.outerScopes)
 
   private def logicalPlan = queryExecution.analyzed
   private def sqlContext = queryExecution.sqlContext
@@ -76,7 +76,7 @@ class GroupedDataset[K, V] private[sql](
   def keyAs[L : Encoder]: GroupedDataset[L, V] =
     new GroupedDataset(
       encoderFor[L],
-      unresolvedTEncoder,
+      unresolvedVEncoder,
       queryExecution,
       dataAttributes,
       groupingAttributes)
@@ -110,13 +110,13 @@ class GroupedDataset[K, V] private[sql](
    *
    * @since 1.6.0
    */
-  def flatMapGroup[U : Encoder](f: (K, Iterator[V]) => TraversableOnce[U]): Dataset[U] = {
+  def flatMapGroups[U : Encoder](f: (K, Iterator[V]) => TraversableOnce[U]): Dataset[U] = {
     new Dataset[U](
       sqlContext,
       MapGroups(
         f,
         resolvedKEncoder,
-        resolvedTEncoder,
+        resolvedVEncoder,
         groupingAttributes,
         logicalPlan))
   }
@@ -138,8 +138,8 @@ class GroupedDataset[K, V] private[sql](
    *
    * @since 1.6.0
    */
-  def flatMapGroup[U](f: FlatMapGroupFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
-    flatMapGroup((key, data) => f.call(key, data.asJava).asScala)(encoder)
+  def flatMapGroups[U](f: FlatMapGroupsFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
+    flatMapGroups((key, data) => f.call(key, data.asJava).asScala)(encoder)
   }
 
   /**
@@ -158,9 +158,9 @@ class GroupedDataset[K, V] private[sql](
    *
    * @since 1.6.0
    */
-  def mapGroup[U : Encoder](f: (K, Iterator[V]) => U): Dataset[U] = {
+  def mapGroups[U : Encoder](f: (K, Iterator[V]) => U): Dataset[U] = {
     val func = (key: K, it: Iterator[V]) => Iterator(f(key, it))
-    flatMapGroup(func)
+    flatMapGroups(func)
   }
 
   /**
@@ -179,8 +179,8 @@ class GroupedDataset[K, V] private[sql](
    *
    * @since 1.6.0
    */
-  def mapGroup[U](f: MapGroupFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
-    mapGroup((key, data) => f.call(key, data.asJava))(encoder)
+  def mapGroups[U](f: MapGroupsFunction[K, V, U], encoder: Encoder[U]): Dataset[U] = {
+    mapGroups((key, data) => f.call(key, data.asJava))(encoder)
   }
 
   /**
@@ -192,8 +192,8 @@ class GroupedDataset[K, V] private[sql](
   def reduce(f: (V, V) => V): Dataset[(K, V)] = {
     val func = (key: K, it: Iterator[V]) => Iterator((key, it.reduce(f)))
 
-    implicit val resultEncoder = ExpressionEncoder.tuple(unresolvedKEncoder, unresolvedTEncoder)
-    flatMapGroup(func)
+    implicit val resultEncoder = ExpressionEncoder.tuple(unresolvedKEncoder, unresolvedVEncoder)
+    flatMapGroups(func)
   }
 
   /**
@@ -213,7 +213,7 @@ class GroupedDataset[K, V] private[sql](
 
   private def withEncoder(c: Column): Column = c match {
     case tc: TypedColumn[_, _] =>
-      tc.withInputType(resolvedTEncoder.bind(dataAttributes), dataAttributes)
+      tc.withInputType(resolvedVEncoder.bind(dataAttributes), dataAttributes)
     case _ => c
   }
 
@@ -227,7 +227,7 @@ class GroupedDataset[K, V] private[sql](
     val encoders = columns.map(_.encoder)
     val namedColumns =
       columns.map(
-        _.withInputType(resolvedTEncoder, dataAttributes).named)
+        _.withInputType(resolvedVEncoder, dataAttributes).named)
     val keyColumn = if (groupingAttributes.length > 1) {
       Alias(CreateStruct(groupingAttributes), "key")()
     } else {
@@ -304,7 +304,7 @@ class GroupedDataset[K, V] private[sql](
   def cogroup[U, R : Encoder](
       other: GroupedDataset[K, U])(
       f: (K, Iterator[V], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
-    implicit def uEnc: Encoder[U] = other.unresolvedTEncoder
+    implicit def uEnc: Encoder[U] = other.unresolvedVEncoder
     new Dataset[R](
       sqlContext,
       CoGroup(
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
index cf335efdd23b..67a3190cb7d4 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDatasetSuite.java
@@ -170,7 +170,7 @@ public Integer call(String v) throws Exception {
       }
     }, Encoders.INT());
 
-    Dataset<String> mapped = grouped.mapGroup(new MapGroupFunction<Integer, String, String>() {
+    Dataset<String> mapped = grouped.mapGroups(new MapGroupsFunction<Integer, String, String>() {
       @Override
       public String call(Integer key, Iterator<String> values) throws Exception {
         StringBuilder sb = new StringBuilder(key.toString());
@@ -183,8 +183,8 @@ public String call(Integer key, Iterator<String> values) throws Exception {
 
     Assert.assertEquals(Arrays.asList("1a", "3foobar"), mapped.collectAsList());
 
-    Dataset<String> flatMapped = grouped.flatMapGroup(
-      new FlatMapGroupFunction<Integer, String, String>() {
+    Dataset<String> flatMapped = grouped.flatMapGroups(
+      new FlatMapGroupsFunction<Integer, String, String>() {
         @Override
         public Iterable<String> call(Integer key, Iterator<String> values) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
@@ -249,8 +249,8 @@ public void testGroupByColumn() {
     GroupedDataset<Integer, String> grouped =
       ds.groupBy(length(col("value"))).keyAs(Encoders.INT());
 
-    Dataset<String> mapped = grouped.mapGroup(
-      new MapGroupFunction<Integer, String, String>() {
+    Dataset<String> mapped = grouped.mapGroups(
+      new MapGroupsFunction<Integer, String, String>() {
         @Override
         public String call(Integer key, Iterator<String> data) throws Exception {
           StringBuilder sb = new StringBuilder(key.toString());
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
index d387710357be..f75d0961823c 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetPrimitiveSuite.scala
@@ -86,7 +86,7 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, map") {
     val ds = Seq(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11).toDS()
     val grouped = ds.groupBy(_ % 2)
-    val agged = grouped.mapGroup { case (g, iter) =>
+    val agged = grouped.mapGroups { case (g, iter) =>
       val name = if (g == 0) "even" else "odd"
       (name, iter.size)
     }
@@ -99,7 +99,7 @@ class DatasetPrimitiveSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, flatMap") {
     val ds = Seq("a", "b", "c", "xyz", "hello").toDS()
     val grouped = ds.groupBy(_.length)
-    val agged = grouped.flatMapGroup { case (g, iter) => Iterator(g.toString, iter.mkString) }
+    val agged = grouped.flatMapGroups { case (g, iter) => Iterator(g.toString, iter.mkString) }
 
     checkAnswer(
       agged,
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index cc8e4325fd2f..dbdd7ba14a5b 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -224,7 +224,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
-    val agged = grouped.mapGroup { case (g, iter) => (g._1, iter.map(_._2).sum) }
+    val agged = grouped.mapGroups { case (g, iter) => (g._1, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -234,7 +234,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy function, flatMap") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy(v => (v._1, "word"))
-    val agged = grouped.flatMapGroup { case (g, iter) =>
+    val agged = grouped.flatMapGroups { case (g, iter) =>
       Iterator(g._1, iter.map(_._2).sum.toString)
     }
 
@@ -255,7 +255,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy columns, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1")
-    val agged = grouped.mapGroup { case (g, iter) => (g.getString(0), iter.map(_._2).sum) }
+    val agged = grouped.mapGroups { case (g, iter) => (g.getString(0), iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -265,7 +265,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy columns asKey, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1").keyAs[String]
-    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
+    val agged = grouped.mapGroups { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -275,7 +275,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy columns asKey tuple, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1", lit(1)).keyAs[(String, Int)]
-    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
+    val agged = grouped.mapGroups { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,
@@ -285,7 +285,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
   test("groupBy columns asKey class, map") {
     val ds = Seq(("a", 10), ("a", 20), ("b", 1), ("b", 2), ("c", 1)).toDS()
     val grouped = ds.groupBy($"_1".as("a"), lit(1).as("b")).keyAs[ClassData]
-    val agged = grouped.mapGroup { case (g, iter) => (g, iter.map(_._2).sum) }
+    val agged = grouped.mapGroups { case (g, iter) => (g, iter.map(_._2).sum) }
 
     checkAnswer(
       agged,

From 6cf51a7007bd72eb93ade149ca9fc53be5b32a17 Mon Sep 17 00:00:00 2001
From: Nicholas Chammas <nicholas.chammas@gmail.com>
Date: Mon, 23 Nov 2015 22:22:50 -0800
Subject: [PATCH 865/896] [SPARK-11903] Remove --skip-java-test

Per [pwendell's comments on SPARK-11903](https://issues.apache.org/jira/browse/SPARK-11903?focusedCommentId=15021511&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15021511) I'm removing this dead code.

If we are concerned about preserving compatibility, I can instead leave the option in and add a warning.

For example:

```sh
echo "Warning: '--skip-java-test' is deprecated and has no effect."
;;
```

cc pwendell, srowen

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #9924 from nchammas/make-distribution.
---
 make-distribution.sh | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/make-distribution.sh b/make-distribution.sh
index d7d27e253f72..7b417fe7cf61 100755
--- a/make-distribution.sh
+++ b/make-distribution.sh
@@ -69,9 +69,6 @@ while (( "$#" )); do
       echo "Error: '--with-hive' is no longer supported, use Maven options -Phive and -Phive-thriftserver"
       exit_with_usage
       ;;
-    --skip-java-test)
-      SKIP_JAVA_TEST=true
-      ;;
     --with-tachyon)
       SPARK_TACHYON=true
       ;;

From 4021a28ac30b65cb61cf1e041253847253a2d89f Mon Sep 17 00:00:00 2001
From: Mikhail Bautin <mbautin@gmail.com>
Date: Mon, 23 Nov 2015 22:26:08 -0800
Subject: [PATCH 866/896] [SPARK-10707][SQL] Fix nullability computation in
 union output

Author: Mikhail Bautin <mbautin@gmail.com>

Closes #9308 from mbautin/SPARK-10707.
---
 .../plans/logical/basicOperators.scala        | 11 +++++--
 .../spark/sql/execution/basicOperators.scala  |  9 ++++--
 .../org/apache/spark/sql/SQLQuerySuite.scala  | 31 +++++++++++++++++++
 3 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 0c444482c5e4..737e62fd5921 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -92,8 +92,10 @@ case class Filter(condition: Expression, child: LogicalPlan) extends UnaryNode {
 }
 
 abstract class SetOperation(left: LogicalPlan, right: LogicalPlan) extends BinaryNode {
-  // TODO: These aren't really the same attributes as nullability etc might change.
-  final override def output: Seq[Attribute] = left.output
+  override def output: Seq[Attribute] =
+    left.output.zip(right.output).map { case (leftAttr, rightAttr) =>
+      leftAttr.withNullability(leftAttr.nullable || rightAttr.nullable)
+    }
 
   final override lazy val resolved: Boolean =
     childrenResolved &&
@@ -115,7 +117,10 @@ case class Union(left: LogicalPlan, right: LogicalPlan) extends SetOperation(lef
 
 case class Intersect(left: LogicalPlan, right: LogicalPlan) extends SetOperation(left, right)
 
-case class Except(left: LogicalPlan, right: LogicalPlan) extends SetOperation(left, right)
+case class Except(left: LogicalPlan, right: LogicalPlan) extends SetOperation(left, right) {
+  /** We don't use right.output because those rows get excluded from the set. */
+  override def output: Seq[Attribute] = left.output
+}
 
 case class Join(
   left: LogicalPlan,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index e79092efdaa3..d57b8e7a9ed6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -130,8 +130,13 @@ case class Sample(
  * Union two plans, without a distinct. This is UNION ALL in SQL.
  */
 case class Union(children: Seq[SparkPlan]) extends SparkPlan {
-  // TODO: attributes output by union should be distinct for nullability purposes
-  override def output: Seq[Attribute] = children.head.output
+  override def output: Seq[Attribute] = {
+    children.tail.foldLeft(children.head.output) { case (currentOutput, child) =>
+      currentOutput.zip(child.output).map { case (a1, a2) =>
+        a1.withNullability(a1.nullable || a2.nullable)
+      }
+    }
+  }
   override def outputsUnsafeRows: Boolean = children.forall(_.outputsUnsafeRows)
   override def canProcessUnsafeRows: Boolean = true
   override def canProcessSafeRows: Boolean = true
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index 167aea87de07..bb82b562aaaa 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -1997,4 +1997,35 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext {
     sqlContext.setConf("spark.sql.subexpressionElimination.enabled", "true")
     verifyCallCount(df.selectExpr("testUdf(a)", "testUdf(a)"), Row(1, 1), 1)
   }
+
+  test("SPARK-10707: nullability should be correctly propagated through set operations (1)") {
+    // This test produced an incorrect result of 1 before the SPARK-10707 fix because of the
+    // NullPropagation rule: COUNT(v) got replaced with COUNT(1) because the output column of
+    // UNION was incorrectly considered non-nullable:
+    checkAnswer(
+      sql("""SELECT count(v) FROM (
+            |  SELECT v FROM (
+            |    SELECT 'foo' AS v UNION ALL
+            |    SELECT NULL AS v
+            |  ) my_union WHERE isnull(v)
+            |) my_subview""".stripMargin),
+      Seq(Row(0)))
+  }
+
+  test("SPARK-10707: nullability should be correctly propagated through set operations (2)") {
+    // This test uses RAND() to stop column pruning for Union and checks the resulting isnull
+    // value. This would produce an incorrect result before the fix in SPARK-10707 because the "v"
+    // column of the union was considered non-nullable.
+    checkAnswer(
+      sql(
+        """
+          |SELECT a FROM (
+          |  SELECT ISNULL(v) AS a, RAND() FROM (
+          |    SELECT 'foo' AS v UNION ALL SELECT null AS v
+          |  ) my_union
+          |) my_view
+        """.stripMargin),
+      Row(false) :: Row(true) :: Nil)
+  }
+
 }

From 12eea834d7382fbaa9c92182b682b8724049d7c1 Mon Sep 17 00:00:00 2001
From: Xiu Guo <xguo27@gmail.com>
Date: Tue, 24 Nov 2015 00:07:40 -0800
Subject: [PATCH 867/896] [SPARK-11897][SQL] Add @scala.annotations.varargs to
 sql functions

Author: Xiu Guo <xguo27@gmail.com>

Closes #9918 from xguo27/SPARK-11897.
---
 sql/core/src/main/scala/org/apache/spark/sql/functions.scala | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index b27b1340cce4..6137ce3a70fd 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -689,6 +689,7 @@ object functions extends LegacyFunctions {
    * @group normal_funcs
    * @since 1.4.0
    */
+  @scala.annotation.varargs
   def array(colName: String, colNames: String*): Column = {
     array((colName +: colNames).map(col) : _*)
   }
@@ -871,6 +872,7 @@ object functions extends LegacyFunctions {
    * @group normal_funcs
    * @since 1.4.0
    */
+  @scala.annotation.varargs
   def struct(colName: String, colNames: String*): Column = {
     struct((colName +: colNames).map(col) : _*)
   }

From 800bd799acf7f10a469d8d6537279953129eb2c6 Mon Sep 17 00:00:00 2001
From: Forest Fang <forest.fang@outlook.com>
Date: Tue, 24 Nov 2015 09:03:32 +0000
Subject: [PATCH 868/896] [SPARK-11906][WEB UI] Speculation Tasks Cause
 ProgressBar UI Overflow

When there are speculative tasks in the stage, running progress bar could overflow and goes hidden on a new line:
![image](https://cloud.githubusercontent.com/assets/4317392/11326841/5fd3482e-9142-11e5-8ca5-cb2f0c0c8964.png)
3 completed / 2 running (including 1 speculative) out of 4 total tasks

This is a simple fix by capping the started tasks at `total - completed` tasks
![image](https://cloud.githubusercontent.com/assets/4317392/11326842/6bb67260-9142-11e5-90f0-37f9174878ec.png)

I should note my preferred way to fix it is via css style
```css
.progress { display: flex; }
```
which shifts the correction burden from driver to web browser. However I couldn't get selenium test to measure the position/dimension of the progress bar correctly to get this unit tested.

It also has the side effect that the width will be calibrated so the running occupies 2 / 5 instead of 1 / 4.
![image](https://cloud.githubusercontent.com/assets/4317392/11326848/7b03e9f0-9142-11e5-89ad-bd99cb0647cf.png)

All in all, since this cosmetic bug is minor enough, I suppose the original simple fix should be good enough.

Author: Forest Fang <forest.fang@outlook.com>

Closes #9896 from saurfang/progressbar.
---
 core/src/main/scala/org/apache/spark/ui/UIUtils.scala  |  4 +++-
 .../test/scala/org/apache/spark/ui/UIUtilsSuite.scala  | 10 ++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
index 25dcb604d9e5..84a1116a5c49 100644
--- a/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
+++ b/core/src/main/scala/org/apache/spark/ui/UIUtils.scala
@@ -319,7 +319,9 @@ private[spark] object UIUtils extends Logging {
       skipped: Int,
       total: Int): Seq[Node] = {
     val completeWidth = "width: %s%%".format((completed.toDouble/total)*100)
-    val startWidth = "width: %s%%".format((started.toDouble/total)*100)
+    // started + completed can be > total when there are speculative tasks
+    val boundedStarted = math.min(started, total - completed)
+    val startWidth = "width: %s%%".format((boundedStarted.toDouble/total)*100)
 
     <div class="progress">
       <span style="text-align:center; position:absolute; width:100%; left:0;">
diff --git a/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala b/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala
index 2b693c165180..dd8d5ec27f87 100644
--- a/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala
+++ b/core/src/test/scala/org/apache/spark/ui/UIUtilsSuite.scala
@@ -57,6 +57,16 @@ class UIUtilsSuite extends SparkFunSuite {
     )
   }
 
+  test("SPARK-11906: Progress bar should not overflow because of speculative tasks") {
+    val generated = makeProgressBar(2, 3, 0, 0, 4).head.child.filter(_.label == "div")
+    val expected = Seq(
+      <div class="bar bar-completed" style="width: 75.0%"></div>,
+      <div class="bar bar-running" style="width: 25.0%"></div>
+    )
+    assert(generated.sameElements(expected),
+      s"\nRunning progress bar should round down\n\nExpected:\n$expected\nGenerated:\n$generated")
+  }
+
   private def verify(
       desc: String, expected: Elem, errorMsg: String = "", baseUrl: String = ""): Unit = {
     val generated = makeDescription(desc, baseUrl)

From d4a5e6f719079639ffd38470f4d8d1f6fde3228d Mon Sep 17 00:00:00 2001
From: huangzhaowei <carlmartinmax@gmail.com>
Date: Tue, 24 Nov 2015 23:24:49 +0800
Subject: [PATCH 869/896] [SPARK-11043][SQL] BugFix:Set the operator log in the
 thrift server.

`SessionManager` will set the `operationLog` if the configuration `hive.server2.logging.operation.enabled` is true in version of hive 1.2.1.
But the spark did not adapt to this change, so no matter enabled the configuration or not, spark thrift server will always log the warn message.
PS: if `hive.server2.logging.operation.enabled` is false, it should log the warn message (the same as hive thrift server).

Author: huangzhaowei <carlmartinmax@gmail.com>

Closes #9056 from SaintBacchus/SPARK-11043.
---
 .../SparkExecuteStatementOperation.scala         |  8 ++++----
 .../thriftserver/SparkSQLSessionManager.scala    |  5 +++++
 .../thriftserver/HiveThriftServer2Suites.scala   | 16 +++++++++++++++-
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
index 82fef92dcb73..e022ee86a763 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkExecuteStatementOperation.scala
@@ -134,12 +134,12 @@ private[hive] class SparkExecuteStatementOperation(
 
   def getResultSetSchema: TableSchema = resultSchema
 
-  override def run(): Unit = {
+  override def runInternal(): Unit = {
     setState(OperationState.PENDING)
     setHasResultSet(true) // avoid no resultset for async run
 
     if (!runInBackground) {
-      runInternal()
+      execute()
     } else {
       val sparkServiceUGI = Utils.getUGI()
 
@@ -151,7 +151,7 @@ private[hive] class SparkExecuteStatementOperation(
           val doAsAction = new PrivilegedExceptionAction[Unit]() {
             override def run(): Unit = {
               try {
-                runInternal()
+                execute()
               } catch {
                 case e: HiveSQLException =>
                   setOperationException(e)
@@ -188,7 +188,7 @@ private[hive] class SparkExecuteStatementOperation(
     }
   }
 
-  override def runInternal(): Unit = {
+  private def execute(): Unit = {
     statementId = UUID.randomUUID().toString
     logInfo(s"Running query '$statement' with $statementId")
     setState(OperationState.RUNNING)
diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
index af4fcdf021bd..de4e9c62b57a 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLSessionManager.scala
@@ -41,6 +41,11 @@ private[hive] class SparkSQLSessionManager(hiveServer: HiveServer2, hiveContext:
   override def init(hiveConf: HiveConf) {
     setSuperField(this, "hiveConf", hiveConf)
 
+    // Create operation log root directory, if operation logging is enabled
+    if (hiveConf.getBoolVar(ConfVars.HIVE_SERVER2_LOGGING_OPERATION_ENABLED)) {
+      invoke(classOf[SessionManager], this, "initOperationLogRootDir")
+    }
+
     val backgroundPoolSize = hiveConf.getIntVar(ConfVars.HIVE_SERVER2_ASYNC_EXEC_THREADS)
     setSuperField(this, "backgroundOperationPool", Executors.newFixedThreadPool(backgroundPoolSize))
     getAncestorField[Log](this, 3, "LOG").info(
diff --git a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
index 1dd898aa3835..139d8e897ba1 100644
--- a/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
+++ b/sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
@@ -26,6 +26,7 @@ import scala.collection.mutable.ArrayBuffer
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.duration._
 import scala.concurrent.{Await, Promise, future}
+import scala.io.Source
 import scala.util.{Random, Try}
 
 import com.google.common.base.Charsets.UTF_8
@@ -507,6 +508,12 @@ class HiveThriftBinaryServerSuite extends HiveThriftJdbcTest {
       assert(rs2.getInt(2) === 500)
     }
   }
+
+  test("SPARK-11043 check operation log root directory") {
+    val expectedLine =
+      "Operation log root directory is created: " + operationLogPath.getAbsoluteFile
+    assert(Source.fromFile(logPath).getLines().exists(_.contains(expectedLine)))
+  }
 }
 
 class SingleSessionSuite extends HiveThriftJdbcTest {
@@ -642,7 +649,8 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
   protected def metastoreJdbcUri = s"jdbc:derby:;databaseName=$metastorePath;create=true"
 
   private val pidDir: File = Utils.createTempDir("thriftserver-pid")
-  private var logPath: File = _
+  protected var logPath: File = _
+  protected var operationLogPath: File = _
   private var logTailingProcess: Process = _
   private var diagnosisBuffer: ArrayBuffer[String] = ArrayBuffer.empty[String]
 
@@ -679,6 +687,7 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
        |  --hiveconf ${ConfVars.METASTOREWAREHOUSE}=$warehousePath
        |  --hiveconf ${ConfVars.HIVE_SERVER2_THRIFT_BIND_HOST}=localhost
        |  --hiveconf ${ConfVars.HIVE_SERVER2_TRANSPORT_MODE}=$mode
+       |  --hiveconf ${ConfVars.HIVE_SERVER2_LOGGING_OPERATION_LOG_LOCATION}=$operationLogPath
        |  --hiveconf $portConf=$port
        |  --driver-class-path $driverClassPath
        |  --driver-java-options -Dlog4j.debug
@@ -706,6 +715,8 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
     warehousePath.delete()
     metastorePath = Utils.createTempDir()
     metastorePath.delete()
+    operationLogPath = Utils.createTempDir()
+    operationLogPath.delete()
     logPath = null
     logTailingProcess = null
 
@@ -782,6 +793,9 @@ abstract class HiveThriftServer2Test extends SparkFunSuite with BeforeAndAfterAl
     metastorePath.delete()
     metastorePath = null
 
+    operationLogPath.delete()
+    operationLogPath = null
+
     Option(logPath).foreach(_.delete())
     logPath = null
 

From 5889880fbe9628681042036892ef7ebd4f0857b4 Mon Sep 17 00:00:00 2001
From: Daoyuan Wang <daoyuan.wang@intel.com>
Date: Tue, 24 Nov 2015 23:32:05 +0800
Subject: [PATCH 870/896] [SPARK-11592][SQL] flush spark-sql command line
 history to history file

Currently, `spark-sql` would not flush command history when exiting.

Author: Daoyuan Wang <daoyuan.wang@intel.com>

Closes #9563 from adrian-wang/jline.
---
 .../hive/thriftserver/SparkSQLCLIDriver.scala    | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
index 6419002a2aa8..4b928e600b35 100644
--- a/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
+++ b/sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala
@@ -194,6 +194,22 @@ private[hive] object SparkSQLCLIDriver extends Logging {
         logWarning(e.getMessage)
     }
 
+    // add shutdown hook to flush the history to history file
+    Runtime.getRuntime.addShutdownHook(new Thread(new Runnable() {
+      override def run() = {
+        reader.getHistory match {
+          case h: FileHistory =>
+            try {
+              h.flush()
+            } catch {
+              case e: IOException =>
+                logWarning("WARNING: Failed to write command history file: " + e.getMessage)
+            }
+          case _ =>
+        }
+      }
+    }))
+
     // TODO: missing
 /*
     val clientTransportTSocketField = classOf[CliSessionState].getDeclaredField("transport")

From be9dd1550c1816559d3d418a19c692e715f1c94e Mon Sep 17 00:00:00 2001
From: Jungtaek Lim <kabhwan@gmail.com>
Date: Tue, 24 Nov 2015 09:20:09 -0800
Subject: [PATCH 871/896] =?UTF-8?q?[SPARK-11818][REPL]=20Fix=20ExecutorCla?=
 =?UTF-8?q?ssLoader=20to=20lookup=20resources=20from=20=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…parent class loader

Without patch, two additional tests of ExecutorClassLoaderSuite fails.

- "resource from parent"
- "resources from parent"

Detailed explanation is here, https://issues.apache.org/jira/browse/SPARK-11818?focusedCommentId=15011202&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15011202

Author: Jungtaek Lim <kabhwan@gmail.com>

Closes #9812 from HeartSaVioR/SPARK-11818.
---
 .../spark/repl/ExecutorClassLoader.scala      | 12 +++++++-
 .../spark/repl/ExecutorClassLoaderSuite.scala | 29 +++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
index a976e96809cb..a8859fcd4584 100644
--- a/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
+++ b/repl/src/main/scala/org/apache/spark/repl/ExecutorClassLoader.scala
@@ -34,7 +34,9 @@ import org.apache.spark.util.ParentClassLoader
 /**
  * A ClassLoader that reads classes from a Hadoop FileSystem or HTTP URI,
  * used to load classes defined by the interpreter when the REPL is used.
- * Allows the user to specify if user class path should be first
+ * Allows the user to specify if user class path should be first.
+ * This class loader delegates getting/finding resources to parent loader,
+ * which makes sense until REPL never provide resource dynamically.
  */
 class ExecutorClassLoader(conf: SparkConf, classUri: String, parent: ClassLoader,
     userClassPathFirst: Boolean) extends ClassLoader with Logging {
@@ -55,6 +57,14 @@ class ExecutorClassLoader(conf: SparkConf, classUri: String, parent: ClassLoader
     }
   }
 
+  override def getResource(name: String): URL = {
+    parentLoader.getResource(name)
+  }
+
+  override def getResources(name: String): java.util.Enumeration[URL] = {
+    parentLoader.getResources(name)
+  }
+
   override def findClass(name: String): Class[_] = {
     userClassPathFirst match {
       case true => findClassLocally(name).getOrElse(parentLoader.loadClass(name))
diff --git a/repl/src/test/scala/org/apache/spark/repl/ExecutorClassLoaderSuite.scala b/repl/src/test/scala/org/apache/spark/repl/ExecutorClassLoaderSuite.scala
index a58eda12b112..c1211f7596b9 100644
--- a/repl/src/test/scala/org/apache/spark/repl/ExecutorClassLoaderSuite.scala
+++ b/repl/src/test/scala/org/apache/spark/repl/ExecutorClassLoaderSuite.scala
@@ -19,8 +19,13 @@ package org.apache.spark.repl
 
 import java.io.File
 import java.net.{URL, URLClassLoader}
+import java.nio.charset.StandardCharsets
+import java.util
+
+import com.google.common.io.Files
 
 import scala.concurrent.duration._
+import scala.io.Source
 import scala.language.implicitConversions
 import scala.language.postfixOps
 
@@ -41,6 +46,7 @@ class ExecutorClassLoaderSuite
 
   val childClassNames = List("ReplFakeClass1", "ReplFakeClass2")
   val parentClassNames = List("ReplFakeClass1", "ReplFakeClass2", "ReplFakeClass3")
+  val parentResourceNames = List("fake-resource.txt")
   var tempDir1: File = _
   var tempDir2: File = _
   var url1: String = _
@@ -54,6 +60,9 @@ class ExecutorClassLoaderSuite
     url1 = "file://" + tempDir1
     urls2 = List(tempDir2.toURI.toURL).toArray
     childClassNames.foreach(TestUtils.createCompiledClass(_, tempDir1, "1"))
+    parentResourceNames.foreach { x =>
+      Files.write("resource".getBytes(StandardCharsets.UTF_8), new File(tempDir2, x))
+    }
     parentClassNames.foreach(TestUtils.createCompiledClass(_, tempDir2, "2"))
   }
 
@@ -99,6 +108,26 @@ class ExecutorClassLoaderSuite
     }
   }
 
+  test("resource from parent") {
+    val parentLoader = new URLClassLoader(urls2, null)
+    val classLoader = new ExecutorClassLoader(new SparkConf(), url1, parentLoader, true)
+    val resourceName: String = parentResourceNames.head
+    val is = classLoader.getResourceAsStream(resourceName)
+    assert(is != null, s"Resource $resourceName not found")
+    val content = Source.fromInputStream(is, "UTF-8").getLines().next()
+    assert(content.contains("resource"), "File doesn't contain 'resource'")
+  }
+
+  test("resources from parent") {
+    val parentLoader = new URLClassLoader(urls2, null)
+    val classLoader = new ExecutorClassLoader(new SparkConf(), url1, parentLoader, true)
+    val resourceName: String = parentResourceNames.head
+    val resources: util.Enumeration[URL] = classLoader.getResources(resourceName)
+    assert(resources.hasMoreElements, s"Resource $resourceName not found")
+    val fileReader = Source.fromInputStream(resources.nextElement().openStream()).bufferedReader()
+    assert(fileReader.readLine().contains("resource"), "File doesn't contain 'resource'")
+  }
+
   test("failing to fetch classes from HTTP server should not leak resources (SPARK-6209)") {
     // This is a regression test for SPARK-6209, a bug where each failed attempt to load a class
     // from the driver's class server would leak a HTTP connection, causing the class server's

From e5aaae6e1145b8c25c4872b2992ab425da9c6f9b Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 24 Nov 2015 09:28:39 -0800
Subject: [PATCH 872/896] [SPARK-11942][SQL] fix encoder life cycle for CoGroup

we should pass in resolved encodera to logical `CoGroup` and bind them in physical `CoGroup`

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9928 from cloud-fan/cogroup.
---
 .../plans/logical/basicOperators.scala        | 27 ++++++++++---------
 .../org/apache/spark/sql/GroupedDataset.scala |  4 ++-
 .../spark/sql/execution/basicOperators.scala  | 20 +++++++-------
 .../org/apache/spark/sql/DatasetSuite.scala   | 12 +++++++++
 4 files changed, 41 insertions(+), 22 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
index 737e62fd5921..5665fd7e5f41 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicOperators.scala
@@ -553,19 +553,22 @@ case class MapGroups[K, T, U](
 
 /** Factory for constructing new `CoGroup` nodes. */
 object CoGroup {
-  def apply[K : Encoder, Left : Encoder, Right : Encoder, R : Encoder](
-      func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
+  def apply[Key, Left, Right, Result : Encoder](
+      func: (Key, Iterator[Left], Iterator[Right]) => TraversableOnce[Result],
+      keyEnc: ExpressionEncoder[Key],
+      leftEnc: ExpressionEncoder[Left],
+      rightEnc: ExpressionEncoder[Right],
       leftGroup: Seq[Attribute],
       rightGroup: Seq[Attribute],
       left: LogicalPlan,
-      right: LogicalPlan): CoGroup[K, Left, Right, R] = {
+      right: LogicalPlan): CoGroup[Key, Left, Right, Result] = {
     CoGroup(
       func,
-      encoderFor[K],
-      encoderFor[Left],
-      encoderFor[Right],
-      encoderFor[R],
-      encoderFor[R].schema.toAttributes,
+      keyEnc,
+      leftEnc,
+      rightEnc,
+      encoderFor[Result],
+      encoderFor[Result].schema.toAttributes,
       leftGroup,
       rightGroup,
       left,
@@ -577,12 +580,12 @@ object CoGroup {
  * A relation produced by applying `func` to each grouping key and associated values from left and
  * right children.
  */
-case class CoGroup[K, Left, Right, R](
-    func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
-    kEncoder: ExpressionEncoder[K],
+case class CoGroup[Key, Left, Right, Result](
+    func: (Key, Iterator[Left], Iterator[Right]) => TraversableOnce[Result],
+    keyEnc: ExpressionEncoder[Key],
     leftEnc: ExpressionEncoder[Left],
     rightEnc: ExpressionEncoder[Right],
-    rEncoder: ExpressionEncoder[R],
+    resultEnc: ExpressionEncoder[Result],
     output: Seq[Attribute],
     leftGroup: Seq[Attribute],
     rightGroup: Seq[Attribute],
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
index 793a86b13290..a10a89342fb5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedDataset.scala
@@ -304,11 +304,13 @@ class GroupedDataset[K, V] private[sql](
   def cogroup[U, R : Encoder](
       other: GroupedDataset[K, U])(
       f: (K, Iterator[V], Iterator[U]) => TraversableOnce[R]): Dataset[R] = {
-    implicit def uEnc: Encoder[U] = other.unresolvedVEncoder
     new Dataset[R](
       sqlContext,
       CoGroup(
         f,
+        this.resolvedKEncoder,
+        this.resolvedVEncoder,
+        other.resolvedVEncoder,
         this.groupingAttributes,
         other.groupingAttributes,
         this.logicalPlan,
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
index d57b8e7a9ed6..a42aea0b96d4 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicOperators.scala
@@ -375,12 +375,12 @@ case class MapGroups[K, T, U](
  * iterators containing all elements in the group from left and right side.
  * The result of this function is encoded and flattened before being output.
  */
-case class CoGroup[K, Left, Right, R](
-    func: (K, Iterator[Left], Iterator[Right]) => TraversableOnce[R],
-    kEncoder: ExpressionEncoder[K],
+case class CoGroup[Key, Left, Right, Result](
+    func: (Key, Iterator[Left], Iterator[Right]) => TraversableOnce[Result],
+    keyEnc: ExpressionEncoder[Key],
     leftEnc: ExpressionEncoder[Left],
     rightEnc: ExpressionEncoder[Right],
-    rEncoder: ExpressionEncoder[R],
+    resultEnc: ExpressionEncoder[Result],
     output: Seq[Attribute],
     leftGroup: Seq[Attribute],
     rightGroup: Seq[Attribute],
@@ -397,15 +397,17 @@ case class CoGroup[K, Left, Right, R](
     left.execute().zipPartitions(right.execute()) { (leftData, rightData) =>
       val leftGrouped = GroupedIterator(leftData, leftGroup, left.output)
       val rightGrouped = GroupedIterator(rightData, rightGroup, right.output)
-      val groupKeyEncoder = kEncoder.bind(leftGroup)
+      val boundKeyEnc = keyEnc.bind(leftGroup)
+      val boundLeftEnc = leftEnc.bind(left.output)
+      val boundRightEnc = rightEnc.bind(right.output)
 
       new CoGroupedIterator(leftGrouped, rightGrouped, leftGroup).flatMap {
         case (key, leftResult, rightResult) =>
           val result = func(
-            groupKeyEncoder.fromRow(key),
-            leftResult.map(leftEnc.fromRow),
-            rightResult.map(rightEnc.fromRow))
-          result.map(rEncoder.toRow)
+            boundKeyEnc.fromRow(key),
+            leftResult.map(boundLeftEnc.fromRow),
+            rightResult.map(boundRightEnc.fromRow))
+          result.map(resultEnc.toRow)
       }
     }
   }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index dbdd7ba14a5b..13eede1b17d8 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -340,6 +340,18 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       1 -> "a#", 2 -> "#q", 3 -> "abcfoo#w", 5 -> "hello#er")
   }
 
+  test("cogroup with complex data") {
+    val ds1 = Seq(1 -> ClassData("a", 1), 2 -> ClassData("b", 2)).toDS()
+    val ds2 = Seq(2 -> ClassData("c", 3), 3 -> ClassData("d", 4)).toDS()
+    val cogrouped = ds1.groupBy(_._1).cogroup(ds2.groupBy(_._1)) { case (key, data1, data2) =>
+      Iterator(key -> (data1.map(_._2.a).mkString + data2.map(_._2.a).mkString))
+    }
+
+    checkAnswer(
+      cogrouped,
+      1 -> "a", 2 -> "bc", 3 -> "d")
+  }
+
   test("SPARK-11436: we should rebind right encoder when join 2 datasets") {
     val ds1 = Seq("1", "2").toDS().as("a")
     val ds2 = Seq(2, 3).toDS().as("b")

From 56a0aba0a60326ba026056c9a23f3f6ec7258c19 Mon Sep 17 00:00:00 2001
From: Yanbo Liang <ybliang8@gmail.com>
Date: Tue, 24 Nov 2015 09:52:53 -0800
Subject: [PATCH 873/896] [SPARK-11952][ML] Remove duplicate ml examples

Remove duplicate ml examples (only for ml).  mengxr

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #9933 from yanboliang/SPARK-11685.
---
 .../main/python/ml/gradient_boosted_trees.py  | 82 -----------------
 .../src/main/python/ml/logistic_regression.py | 66 --------------
 .../main/python/ml/random_forest_example.py   | 87 -------------------
 3 files changed, 235 deletions(-)
 delete mode 100644 examples/src/main/python/ml/gradient_boosted_trees.py
 delete mode 100644 examples/src/main/python/ml/logistic_regression.py
 delete mode 100644 examples/src/main/python/ml/random_forest_example.py

diff --git a/examples/src/main/python/ml/gradient_boosted_trees.py b/examples/src/main/python/ml/gradient_boosted_trees.py
deleted file mode 100644
index c3bf8aa2eb1e..000000000000
--- a/examples/src/main/python/ml/gradient_boosted_trees.py
+++ /dev/null
@@ -1,82 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from __future__ import print_function
-
-import sys
-
-from pyspark import SparkContext
-from pyspark.ml.classification import GBTClassifier
-from pyspark.ml.feature import StringIndexer
-from pyspark.ml.regression import GBTRegressor
-from pyspark.mllib.evaluation import BinaryClassificationMetrics, RegressionMetrics
-from pyspark.sql import Row, SQLContext
-
-"""
-A simple example demonstrating a Gradient Boosted Trees Classification/Regression Pipeline.
-Note: GBTClassifier only supports binary classification currently
-Run with:
-  bin/spark-submit examples/src/main/python/ml/gradient_boosted_trees.py
-"""
-
-
-def testClassification(train, test):
-    # Train a GradientBoostedTrees model.
-
-    rf = GBTClassifier(maxIter=30, maxDepth=4, labelCol="indexedLabel")
-
-    model = rf.fit(train)
-    predictionAndLabels = model.transform(test).select("prediction", "indexedLabel") \
-        .map(lambda x: (x.prediction, x.indexedLabel))
-
-    metrics = BinaryClassificationMetrics(predictionAndLabels)
-    print("AUC %.3f" % metrics.areaUnderROC)
-
-
-def testRegression(train, test):
-    # Train a GradientBoostedTrees model.
-
-    rf = GBTRegressor(maxIter=30, maxDepth=4, labelCol="indexedLabel")
-
-    model = rf.fit(train)
-    predictionAndLabels = model.transform(test).select("prediction", "indexedLabel") \
-        .map(lambda x: (x.prediction, x.indexedLabel))
-
-    metrics = RegressionMetrics(predictionAndLabels)
-    print("rmse %.3f" % metrics.rootMeanSquaredError)
-    print("r2 %.3f" % metrics.r2)
-    print("mae %.3f" % metrics.meanAbsoluteError)
-
-
-if __name__ == "__main__":
-    if len(sys.argv) > 1:
-        print("Usage: gradient_boosted_trees", file=sys.stderr)
-        exit(1)
-    sc = SparkContext(appName="PythonGBTExample")
-    sqlContext = SQLContext(sc)
-
-    # Load the data stored in LIBSVM format as a DataFrame.
-    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-    # Map labels into an indexed column of labels in [0, numLabels)
-    stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
-    si_model = stringIndexer.fit(df)
-    td = si_model.transform(df)
-    [train, test] = td.randomSplit([0.7, 0.3])
-    testClassification(train, test)
-    testRegression(train, test)
-    sc.stop()
diff --git a/examples/src/main/python/ml/logistic_regression.py b/examples/src/main/python/ml/logistic_regression.py
deleted file mode 100644
index 4cd027fdfbe8..000000000000
--- a/examples/src/main/python/ml/logistic_regression.py
+++ /dev/null
@@ -1,66 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from __future__ import print_function
-
-import sys
-
-from pyspark import SparkContext
-from pyspark.ml.classification import LogisticRegression
-from pyspark.mllib.evaluation import MulticlassMetrics
-from pyspark.ml.feature import StringIndexer
-from pyspark.sql import SQLContext
-
-"""
-A simple example demonstrating a logistic regression with elastic net regularization Pipeline.
-Run with:
-  bin/spark-submit examples/src/main/python/ml/logistic_regression.py
-"""
-
-if __name__ == "__main__":
-
-    if len(sys.argv) > 1:
-        print("Usage: logistic_regression", file=sys.stderr)
-        exit(-1)
-
-    sc = SparkContext(appName="PythonLogisticRegressionExample")
-    sqlContext = SQLContext(sc)
-
-    # Load the data stored in LIBSVM format as a DataFrame.
-    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-    # Map labels into an indexed column of labels in [0, numLabels)
-    stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
-    si_model = stringIndexer.fit(df)
-    td = si_model.transform(df)
-    [training, test] = td.randomSplit([0.7, 0.3])
-
-    lr = LogisticRegression(maxIter=100, regParam=0.3).setLabelCol("indexedLabel")
-    lr.setElasticNetParam(0.8)
-
-    # Fit the model
-    lrModel = lr.fit(training)
-
-    predictionAndLabels = lrModel.transform(test).select("prediction", "indexedLabel") \
-        .map(lambda x: (x.prediction, x.indexedLabel))
-
-    metrics = MulticlassMetrics(predictionAndLabels)
-    print("weighted f-measure %.3f" % metrics.weightedFMeasure())
-    print("precision %s" % metrics.precision())
-    print("recall %s" % metrics.recall())
-
-    sc.stop()
diff --git a/examples/src/main/python/ml/random_forest_example.py b/examples/src/main/python/ml/random_forest_example.py
deleted file mode 100644
index dc6a77867019..000000000000
--- a/examples/src/main/python/ml/random_forest_example.py
+++ /dev/null
@@ -1,87 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-from __future__ import print_function
-
-import sys
-
-from pyspark import SparkContext
-from pyspark.ml.classification import RandomForestClassifier
-from pyspark.ml.feature import StringIndexer
-from pyspark.ml.regression import RandomForestRegressor
-from pyspark.mllib.evaluation import MulticlassMetrics, RegressionMetrics
-from pyspark.mllib.util import MLUtils
-from pyspark.sql import Row, SQLContext
-
-"""
-A simple example demonstrating a RandomForest Classification/Regression Pipeline.
-Run with:
-  bin/spark-submit examples/src/main/python/ml/random_forest_example.py
-"""
-
-
-def testClassification(train, test):
-    # Train a RandomForest model.
-    # Setting featureSubsetStrategy="auto" lets the algorithm choose.
-    # Note: Use larger numTrees in practice.
-
-    rf = RandomForestClassifier(labelCol="indexedLabel", numTrees=3, maxDepth=4)
-
-    model = rf.fit(train)
-    predictionAndLabels = model.transform(test).select("prediction", "indexedLabel") \
-        .map(lambda x: (x.prediction, x.indexedLabel))
-
-    metrics = MulticlassMetrics(predictionAndLabels)
-    print("weighted f-measure %.3f" % metrics.weightedFMeasure())
-    print("precision %s" % metrics.precision())
-    print("recall %s" % metrics.recall())
-
-
-def testRegression(train, test):
-    # Train a RandomForest model.
-    # Note: Use larger numTrees in practice.
-
-    rf = RandomForestRegressor(labelCol="indexedLabel", numTrees=3, maxDepth=4)
-
-    model = rf.fit(train)
-    predictionAndLabels = model.transform(test).select("prediction", "indexedLabel") \
-        .map(lambda x: (x.prediction, x.indexedLabel))
-
-    metrics = RegressionMetrics(predictionAndLabels)
-    print("rmse %.3f" % metrics.rootMeanSquaredError)
-    print("r2 %.3f" % metrics.r2)
-    print("mae %.3f" % metrics.meanAbsoluteError)
-
-
-if __name__ == "__main__":
-    if len(sys.argv) > 1:
-        print("Usage: random_forest_example", file=sys.stderr)
-        exit(1)
-    sc = SparkContext(appName="PythonRandomForestExample")
-    sqlContext = SQLContext(sc)
-
-    # Load the data stored in LIBSVM format as a DataFrame.
-    df = sqlContext.read.format("libsvm").load("data/mllib/sample_libsvm_data.txt")
-
-    # Map labels into an indexed column of labels in [0, numLabels)
-    stringIndexer = StringIndexer(inputCol="label", outputCol="indexedLabel")
-    si_model = stringIndexer.fit(df)
-    td = si_model.transform(df)
-    [train, test] = td.randomSplit([0.7, 0.3])
-    testClassification(train, test)
-    testRegression(train, test)
-    sc.stop()

From 9e24ba667e43290fbaa3cacb93cf5d9be790f1fd Mon Sep 17 00:00:00 2001
From: "Joseph K. Bradley" <joseph@databricks.com>
Date: Tue, 24 Nov 2015 09:54:55 -0800
Subject: [PATCH 874/896] [SPARK-11521][ML][DOC] Document that Logistic, Linear
 Regression summaries ignore weight col

Doc for 1.6 that the summaries mostly ignore the weight column.
To be corrected for 1.7

CC: mengxr thunterdb

Author: Joseph K. Bradley <joseph@databricks.com>

Closes #9927 from jkbradley/linregsummary-doc.
---
 .../ml/classification/LogisticRegression.scala | 18 ++++++++++++++++++
 .../spark/ml/regression/LinearRegression.scala | 15 +++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
index 418bbdc9a058..d320d64dd90d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/classification/LogisticRegression.scala
@@ -755,23 +755,35 @@ class BinaryLogisticRegressionSummary private[classification] (
    * Returns the receiver operating characteristic (ROC) curve,
    * which is an Dataframe having two fields (FPR, TPR)
    * with (0.0, 0.0) prepended and (1.0, 1.0) appended to it.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    * @see http://en.wikipedia.org/wiki/Receiver_operating_characteristic
    */
   @transient lazy val roc: DataFrame = binaryMetrics.roc().toDF("FPR", "TPR")
 
   /**
    * Computes the area under the receiver operating characteristic (ROC) curve.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   lazy val areaUnderROC: Double = binaryMetrics.areaUnderROC()
 
   /**
    * Returns the precision-recall curve, which is an Dataframe containing
    * two fields recall, precision with (0.0, 1.0) prepended to it.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @transient lazy val pr: DataFrame = binaryMetrics.pr().toDF("recall", "precision")
 
   /**
    * Returns a dataframe with two fields (threshold, F-Measure) curve with beta = 1.0.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @transient lazy val fMeasureByThreshold: DataFrame = {
     binaryMetrics.fMeasureByThreshold().toDF("threshold", "F-Measure")
@@ -781,6 +793,9 @@ class BinaryLogisticRegressionSummary private[classification] (
    * Returns a dataframe with two fields (threshold, precision) curve.
    * Every possible probability obtained in transforming the dataset are used
    * as thresholds used in calculating the precision.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @transient lazy val precisionByThreshold: DataFrame = {
     binaryMetrics.precisionByThreshold().toDF("threshold", "precision")
@@ -790,6 +805,9 @@ class BinaryLogisticRegressionSummary private[classification] (
    * Returns a dataframe with two fields (threshold, recall) curve.
    * Every possible probability obtained in transforming the dataset are used
    * as thresholds used in calculating the recall.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LogisticRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @transient lazy val recallByThreshold: DataFrame = {
     binaryMetrics.recallByThreshold().toDF("threshold", "recall")
diff --git a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
index 70ccec766c47..1db91666f21a 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/regression/LinearRegression.scala
@@ -540,6 +540,9 @@ class LinearRegressionSummary private[regression] (
    * Returns the explained variance regression score.
    * explainedVariance = 1 - variance(y - \hat{y}) / variance(y)
    * Reference: [[http://en.wikipedia.org/wiki/Explained_variation]]
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LinearRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @Since("1.5.0")
   val explainedVariance: Double = metrics.explainedVariance
@@ -547,6 +550,9 @@ class LinearRegressionSummary private[regression] (
   /**
    * Returns the mean absolute error, which is a risk function corresponding to the
    * expected value of the absolute error loss or l1-norm loss.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LinearRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @Since("1.5.0")
   val meanAbsoluteError: Double = metrics.meanAbsoluteError
@@ -554,6 +560,9 @@ class LinearRegressionSummary private[regression] (
   /**
    * Returns the mean squared error, which is a risk function corresponding to the
    * expected value of the squared error loss or quadratic loss.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LinearRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @Since("1.5.0")
   val meanSquaredError: Double = metrics.meanSquaredError
@@ -561,6 +570,9 @@ class LinearRegressionSummary private[regression] (
   /**
    * Returns the root mean squared error, which is defined as the square root of
    * the mean squared error.
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LinearRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @Since("1.5.0")
   val rootMeanSquaredError: Double = metrics.rootMeanSquaredError
@@ -568,6 +580,9 @@ class LinearRegressionSummary private[regression] (
   /**
    * Returns R^2^, the coefficient of determination.
    * Reference: [[http://en.wikipedia.org/wiki/Coefficient_of_determination]]
+   *
+   * Note: This ignores instance weights (setting all to 1.0) from [[LinearRegression.weightCol]].
+   *       This will change in later Spark versions.
    */
   @Since("1.5.0")
   val r2: Double = metrics.r2

From 52bc25c8e26d4be250d8ff7864067528f4f98592 Mon Sep 17 00:00:00 2001
From: Yuhao Yang <hhbyyh@gmail.com>
Date: Tue, 24 Nov 2015 09:56:17 -0800
Subject: [PATCH 875/896] [SPARK-11847][ML] Model export/import for spark.ml:
 LDA

Add read/write support to LDA, similar to ALS.

save/load for ml.LocalLDAModel is done.
For DistributedLDAModel, I'm not sure if we can invoke save on the mllib.DistributedLDAModel directly. I'll send update after some test.

Author: Yuhao Yang <hhbyyh@gmail.com>

Closes #9894 from hhbyyh/ldaMLsave.
---
 .../org/apache/spark/ml/clustering/LDA.scala  | 110 +++++++++++++++++-
 .../spark/mllib/clustering/LDAModel.scala     |   4 +-
 .../apache/spark/ml/clustering/LDASuite.scala |  44 ++++++-
 3 files changed, 150 insertions(+), 8 deletions(-)

diff --git a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
index 92e05815d6a3..830510b1698d 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/clustering/LDA.scala
@@ -17,12 +17,13 @@
 
 package org.apache.spark.ml.clustering
 
+import org.apache.hadoop.fs.Path
 import org.apache.spark.Logging
 import org.apache.spark.annotation.{Experimental, Since}
-import org.apache.spark.ml.util.{SchemaUtils, Identifiable}
 import org.apache.spark.ml.{Estimator, Model}
 import org.apache.spark.ml.param.shared.{HasCheckpointInterval, HasFeaturesCol, HasSeed, HasMaxIter}
 import org.apache.spark.ml.param._
+import org.apache.spark.ml.util._
 import org.apache.spark.mllib.clustering.{DistributedLDAModel => OldDistributedLDAModel,
     EMLDAOptimizer => OldEMLDAOptimizer, LDA => OldLDA, LDAModel => OldLDAModel,
     LDAOptimizer => OldLDAOptimizer, LocalLDAModel => OldLocalLDAModel,
@@ -322,7 +323,7 @@ sealed abstract class LDAModel private[ml] (
     @Since("1.6.0") override val uid: String,
     @Since("1.6.0") val vocabSize: Int,
     @Since("1.6.0") @transient protected val sqlContext: SQLContext)
-  extends Model[LDAModel] with LDAParams with Logging {
+  extends Model[LDAModel] with LDAParams with Logging with MLWritable {
 
   // NOTE to developers:
   //  This abstraction should contain all important functionality for basic LDA usage.
@@ -486,6 +487,64 @@ class LocalLDAModel private[ml] (
 
   @Since("1.6.0")
   override def isDistributed: Boolean = false
+
+  @Since("1.6.0")
+  override def write: MLWriter = new LocalLDAModel.LocalLDAModelWriter(this)
+}
+
+
+@Since("1.6.0")
+object LocalLDAModel extends MLReadable[LocalLDAModel] {
+
+  private[LocalLDAModel]
+  class LocalLDAModelWriter(instance: LocalLDAModel) extends MLWriter {
+
+    private case class Data(
+        vocabSize: Int,
+        topicsMatrix: Matrix,
+        docConcentration: Vector,
+        topicConcentration: Double,
+        gammaShape: Double)
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val oldModel = instance.oldLocalModel
+      val data = Data(instance.vocabSize, oldModel.topicsMatrix, oldModel.docConcentration,
+        oldModel.topicConcentration, oldModel.gammaShape)
+      val dataPath = new Path(path, "data").toString
+      sqlContext.createDataFrame(Seq(data)).repartition(1).write.parquet(dataPath)
+    }
+  }
+
+  private class LocalLDAModelReader extends MLReader[LocalLDAModel] {
+
+    private val className = classOf[LocalLDAModel].getName
+
+    override def load(path: String): LocalLDAModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val dataPath = new Path(path, "data").toString
+      val data = sqlContext.read.parquet(dataPath)
+        .select("vocabSize", "topicsMatrix", "docConcentration", "topicConcentration",
+          "gammaShape")
+        .head()
+      val vocabSize = data.getAs[Int](0)
+      val topicsMatrix = data.getAs[Matrix](1)
+      val docConcentration = data.getAs[Vector](2)
+      val topicConcentration = data.getAs[Double](3)
+      val gammaShape = data.getAs[Double](4)
+      val oldModel = new OldLocalLDAModel(topicsMatrix, docConcentration, topicConcentration,
+        gammaShape)
+      val model = new LocalLDAModel(metadata.uid, vocabSize, oldModel, sqlContext)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[LocalLDAModel] = new LocalLDAModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): LocalLDAModel = super.load(path)
 }
 
 
@@ -562,6 +621,45 @@ class DistributedLDAModel private[ml] (
    */
   @Since("1.6.0")
   lazy val logPrior: Double = oldDistributedModel.logPrior
+
+  @Since("1.6.0")
+  override def write: MLWriter = new DistributedLDAModel.DistributedWriter(this)
+}
+
+
+@Since("1.6.0")
+object DistributedLDAModel extends MLReadable[DistributedLDAModel] {
+
+  private[DistributedLDAModel]
+  class DistributedWriter(instance: DistributedLDAModel) extends MLWriter {
+
+    override protected def saveImpl(path: String): Unit = {
+      DefaultParamsWriter.saveMetadata(instance, path, sc)
+      val modelPath = new Path(path, "oldModel").toString
+      instance.oldDistributedModel.save(sc, modelPath)
+    }
+  }
+
+  private class DistributedLDAModelReader extends MLReader[DistributedLDAModel] {
+
+    private val className = classOf[DistributedLDAModel].getName
+
+    override def load(path: String): DistributedLDAModel = {
+      val metadata = DefaultParamsReader.loadMetadata(path, sc, className)
+      val modelPath = new Path(path, "oldModel").toString
+      val oldModel = OldDistributedLDAModel.load(sc, modelPath)
+      val model = new DistributedLDAModel(
+        metadata.uid, oldModel.vocabSize, oldModel, sqlContext, None)
+      DefaultParamsReader.getAndSetParams(model, metadata)
+      model
+    }
+  }
+
+  @Since("1.6.0")
+  override def read: MLReader[DistributedLDAModel] = new DistributedLDAModelReader
+
+  @Since("1.6.0")
+  override def load(path: String): DistributedLDAModel = super.load(path)
 }
 
 
@@ -593,7 +691,8 @@ class DistributedLDAModel private[ml] (
 @Since("1.6.0")
 @Experimental
 class LDA @Since("1.6.0") (
-    @Since("1.6.0") override val uid: String) extends Estimator[LDAModel] with LDAParams {
+    @Since("1.6.0") override val uid: String)
+  extends Estimator[LDAModel] with LDAParams with DefaultParamsWritable {
 
   @Since("1.6.0")
   def this() = this(Identifiable.randomUID("lda"))
@@ -695,7 +794,7 @@ class LDA @Since("1.6.0") (
 }
 
 
-private[clustering] object LDA {
+private[clustering] object LDA extends DefaultParamsReadable[LDA] {
 
   /** Get dataset for spark.mllib LDA */
   def getOldDataset(dataset: DataFrame, featuresCol: String): RDD[(Long, Vector)] = {
@@ -706,4 +805,7 @@ private[clustering] object LDA {
         (docId, features)
       }
   }
+
+  @Since("1.6.0")
+  override def load(path: String): LDA = super.load(path)
 }
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
index cd520f09bd46..7384d065a2ea 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/LDAModel.scala
@@ -187,11 +187,11 @@ abstract class LDAModel private[clustering] extends Saveable {
  * @param topics Inferred topics (vocabSize x k matrix).
  */
 @Since("1.3.0")
-class LocalLDAModel private[clustering] (
+class LocalLDAModel private[spark] (
     @Since("1.3.0") val topics: Matrix,
     @Since("1.5.0") override val docConcentration: Vector,
     @Since("1.5.0") override val topicConcentration: Double,
-    override protected[clustering] val gammaShape: Double = 100)
+    override protected[spark] val gammaShape: Double = 100)
   extends LDAModel with Serializable {
 
   @Since("1.3.0")
diff --git a/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
index b634d31cc34f..97dbfd9a4314 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/clustering/LDASuite.scala
@@ -18,9 +18,10 @@
 package org.apache.spark.ml.clustering
 
 import org.apache.spark.SparkFunSuite
-import org.apache.spark.ml.util.MLTestingUtils
+import org.apache.spark.ml.util.{DefaultReadWriteTest, MLTestingUtils}
 import org.apache.spark.mllib.linalg.{Vector, Vectors}
 import org.apache.spark.mllib.util.MLlibTestSparkContext
+import org.apache.spark.mllib.util.TestingUtils._
 import org.apache.spark.sql.{DataFrame, Row, SQLContext}
 
 
@@ -39,10 +40,24 @@ object LDASuite {
     }.map(v => new TestRow(v))
     sql.createDataFrame(rdd)
   }
+
+  /**
+   * Mapping from all Params to valid settings which differ from the defaults.
+   * This is useful for tests which need to exercise all Params, such as save/load.
+   * This excludes input columns to simplify some tests.
+   */
+  val allParamSettings: Map[String, Any] = Map(
+    "k" -> 3,
+    "maxIter" -> 2,
+    "checkpointInterval" -> 30,
+    "learningOffset" -> 1023.0,
+    "learningDecay" -> 0.52,
+    "subsamplingRate" -> 0.051
+  )
 }
 
 
-class LDASuite extends SparkFunSuite with MLlibTestSparkContext {
+class LDASuite extends SparkFunSuite with MLlibTestSparkContext with DefaultReadWriteTest {
 
   val k: Int = 5
   val vocabSize: Int = 30
@@ -218,4 +233,29 @@ class LDASuite extends SparkFunSuite with MLlibTestSparkContext {
     val lp = model.logPrior
     assert(lp <= 0.0 && lp != Double.NegativeInfinity)
   }
+
+  test("read/write LocalLDAModel") {
+    def checkModelData(model: LDAModel, model2: LDAModel): Unit = {
+      assert(model.vocabSize === model2.vocabSize)
+      assert(Vectors.dense(model.topicsMatrix.toArray) ~==
+        Vectors.dense(model2.topicsMatrix.toArray) absTol 1e-6)
+      assert(Vectors.dense(model.getDocConcentration) ~==
+        Vectors.dense(model2.getDocConcentration) absTol 1e-6)
+    }
+    val lda = new LDA()
+    testEstimatorAndModelReadWrite(lda, dataset, LDASuite.allParamSettings, checkModelData)
+  }
+
+  test("read/write DistributedLDAModel") {
+    def checkModelData(model: LDAModel, model2: LDAModel): Unit = {
+      assert(model.vocabSize === model2.vocabSize)
+      assert(Vectors.dense(model.topicsMatrix.toArray) ~==
+        Vectors.dense(model2.topicsMatrix.toArray) absTol 1e-6)
+      assert(Vectors.dense(model.getDocConcentration) ~==
+        Vectors.dense(model2.getDocConcentration) absTol 1e-6)
+    }
+    val lda = new LDA()
+    testEstimatorAndModelReadWrite(lda, dataset,
+      LDASuite.allParamSettings ++ Map("optimizer" -> "em"), checkModelData)
+  }
 }

From 19530da6903fa59b051eec69b9c17e231c68454b Mon Sep 17 00:00:00 2001
From: Wenchen Fan <wenchen@databricks.com>
Date: Tue, 24 Nov 2015 11:09:01 -0800
Subject: [PATCH 876/896] [SPARK-11926][SQL] unify GetStructField and
 GetInternalRowField

Author: Wenchen Fan <wenchen@databricks.com>

Closes #9909 from cloud-fan/get-struct.
---
 .../spark/sql/catalyst/ScalaReflection.scala  |  2 +-
 .../sql/catalyst/analysis/unresolved.scala    |  8 +++----
 .../catalyst/encoders/ExpressionEncoder.scala |  2 +-
 .../sql/catalyst/encoders/RowEncoder.scala    |  2 +-
 .../sql/catalyst/expressions/Expression.scala |  2 +-
 .../expressions/complexTypeExtractors.scala   | 18 ++++++++--------
 .../expressions/namedExpressions.scala        |  4 ++--
 .../sql/catalyst/expressions/objects.scala    | 21 -------------------
 .../expressions/ComplexTypeSuite.scala        |  4 ++--
 9 files changed, 21 insertions(+), 42 deletions(-)

diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
index 476becec4dd5..d133ad3f0d89 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/ScalaReflection.scala
@@ -130,7 +130,7 @@ object ScalaReflection extends ScalaReflection {
 
     /** Returns the current path with a field at ordinal extracted. */
     def addToPathOrdinal(ordinal: Int, dataType: DataType): Expression = path
-      .map(p => GetInternalRowField(p, ordinal, dataType))
+      .map(p => GetStructField(p, ordinal))
       .getOrElse(BoundReference(ordinal, dataType, false))
 
     /** Returns the current path or `BoundReference`. */
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
index 6485bdfb3023..1b2a8dc4c7f1 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala
@@ -201,12 +201,12 @@ case class UnresolvedStar(target: Option[Seq[String]]) extends Star with Unevalu
     if (attribute.isDefined) {
       // This target resolved to an attribute in child. It must be a struct. Expand it.
       attribute.get.dataType match {
-        case s: StructType => {
-          s.fields.map( f => {
-            val extract = GetStructField(attribute.get, f, s.getFieldIndex(f.name).get)
+        case s: StructType => s.zipWithIndex.map {
+          case (f, i) =>
+            val extract = GetStructField(attribute.get, i)
             Alias(extract, target.get + "." + f.name)()
-          })
         }
+
         case _ => {
           throw new AnalysisException("Can only star expand struct data types. Attribute: `" +
             target.get + "`")
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
index 7bc9aed0b204..0c10a56c555f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/ExpressionEncoder.scala
@@ -111,7 +111,7 @@ object ExpressionEncoder {
           case UnresolvedAttribute(nameParts) =>
             assert(nameParts.length == 1)
             UnresolvedExtractValue(input, Literal(nameParts.head))
-          case BoundReference(ordinal, dt, _) => GetInternalRowField(input, ordinal, dt)
+          case BoundReference(ordinal, dt, _) => GetStructField(input, ordinal)
         }
       }
     }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
index fa553e7c5324..67518f52d4a5 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/encoders/RowEncoder.scala
@@ -220,7 +220,7 @@ object RowEncoder {
         If(
           Invoke(input, "isNullAt", BooleanType, Literal(i) :: Nil),
           Literal.create(null, externalDataTypeFor(f.dataType)),
-          constructorFor(GetInternalRowField(input, i, f.dataType)))
+          constructorFor(GetStructField(input, i)))
       }
       CreateExternalRow(convertedFields)
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
index 540ed3500616..169435a10ea2 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
@@ -206,7 +206,7 @@ abstract class Expression extends TreeNode[Expression] {
    */
   def prettyString: String = {
     transform {
-      case a: AttributeReference => PrettyAttribute(a.name)
+      case a: AttributeReference => PrettyAttribute(a.name, a.dataType)
       case u: UnresolvedAttribute => PrettyAttribute(u.name)
     }.toString
   }
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
index f871b737fff3..10ce10aaf6da 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
@@ -51,7 +51,7 @@ object ExtractValue {
       case (StructType(fields), NonNullLiteral(v, StringType)) =>
         val fieldName = v.toString
         val ordinal = findField(fields, fieldName, resolver)
-        GetStructField(child, fields(ordinal).copy(name = fieldName), ordinal)
+        GetStructField(child, ordinal, Some(fieldName))
 
       case (ArrayType(StructType(fields), containsNull), NonNullLiteral(v, StringType)) =>
         val fieldName = v.toString
@@ -97,18 +97,18 @@ object ExtractValue {
  * Returns the value of fields in the Struct `child`.
  *
  * No need to do type checking since it is handled by [[ExtractValue]].
- * TODO: Unify with [[GetInternalRowField]], remove the need to specify a [[StructField]].
+ *
+ * Note that we can pass in the field name directly to keep case preserving in `toString`.
+ * For example, when get field `yEAr` from `<year: int, month: int>`, we should pass in `yEAr`.
  */
-case class GetStructField(child: Expression, field: StructField, ordinal: Int)
+case class GetStructField(child: Expression, ordinal: Int, name: Option[String] = None)
   extends UnaryExpression {
 
-  override def dataType: DataType = child.dataType match {
-    case s: StructType => s(ordinal).dataType
-    // This is a hack to avoid breaking existing code until we remove the need for the struct field
-    case _ => field.dataType
-  }
+  private lazy val field = child.dataType.asInstanceOf[StructType](ordinal)
+
+  override def dataType: DataType = field.dataType
   override def nullable: Boolean = child.nullable || field.nullable
-  override def toString: String = s"$child.${field.name}"
+  override def toString: String = s"$child.${name.getOrElse(field.name)}"
 
   protected override def nullSafeEval(input: Any): Any =
     input.asInstanceOf[InternalRow].get(ordinal, field.dataType)
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
index 00b7970bd16c..26b6aca79971 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/namedExpressions.scala
@@ -273,7 +273,8 @@ case class AttributeReference(
  * A place holder used when printing expressions without debugging information such as the
  * expression id or the unresolved indicator.
  */
-case class PrettyAttribute(name: String) extends Attribute with Unevaluable {
+case class PrettyAttribute(name: String, dataType: DataType = NullType)
+  extends Attribute with Unevaluable {
 
   override def toString: String = name
 
@@ -286,7 +287,6 @@ case class PrettyAttribute(name: String) extends Attribute with Unevaluable {
   override def qualifiers: Seq[String] = throw new UnsupportedOperationException
   override def exprId: ExprId = throw new UnsupportedOperationException
   override def nullable: Boolean = throw new UnsupportedOperationException
-  override def dataType: DataType = NullType
 }
 
 object VirtualColumn {
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
index 4a1f419f0ad8..62d09f0f5510 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects.scala
@@ -517,27 +517,6 @@ case class CreateExternalRow(children: Seq[Expression]) extends Expression {
   }
 }
 
-case class GetInternalRowField(child: Expression, ordinal: Int, dataType: DataType)
-  extends UnaryExpression {
-
-  override def nullable: Boolean = true
-
-  override def eval(input: InternalRow): Any =
-    throw new UnsupportedOperationException("Only code-generated evaluation is supported")
-
-  override def genCode(ctx: CodeGenContext, ev: GeneratedExpressionCode): String = {
-    nullSafeCodeGen(ctx, ev, eval => {
-      s"""
-        if ($eval.isNullAt($ordinal)) {
-          ${ev.isNull} = true;
-        } else {
-          ${ev.value} = ${ctx.getValue(eval, dataType, ordinal.toString)};
-        }
-      """
-    })
-  }
-}
-
 /**
  * Serializes an input object using a generic serializer (Kryo or Java).
  * @param kryo if true, use Kryo. Otherwise, use Java.
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ComplexTypeSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ComplexTypeSuite.scala
index e60990aeb423..62fd47234b33 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ComplexTypeSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ComplexTypeSuite.scala
@@ -79,8 +79,8 @@ class ComplexTypeSuite extends SparkFunSuite with ExpressionEvalHelper {
     def getStructField(expr: Expression, fieldName: String): GetStructField = {
       expr.dataType match {
         case StructType(fields) =>
-          val field = fields.find(_.name == fieldName).get
-          GetStructField(expr, field, fields.indexOf(field))
+          val index = fields.indexWhere(_.name == fieldName)
+          GetStructField(expr, index)
       }
     }
 

From 81012546ee5a80d2576740af0dad067b0f5962c5 Mon Sep 17 00:00:00 2001
From: tedyu <yuzhihong@gmail.com>
Date: Tue, 24 Nov 2015 12:22:33 -0800
Subject: [PATCH 877/896] [SPARK-11872] Prevent the call to SparkContext#stop()
 in the listener bus's thread

This is continuation of SPARK-11761

Andrew suggested adding this protection. See tail of https://github.com/apache/spark/pull/9741

Author: tedyu <yuzhihong@gmail.com>

Closes #9852 from tedyu/master.
---
 .../scala/org/apache/spark/SparkContext.scala |  4 +++
 .../spark/scheduler/SparkListenerSuite.scala  | 31 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index b153a7b08e59..e19ba113702c 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -1694,6 +1694,10 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
 
   // Shut down the SparkContext.
   def stop() {
+    if (AsynchronousListenerBus.withinListenerThread.value) {
+      throw new SparkException("Cannot stop SparkContext within listener thread of" +
+        " AsynchronousListenerBus")
+    }
     // Use the stopping variable to ensure no contention for the stop scenario.
     // Still track the stopped variable for use elsewhere in the code.
     if (!stopped.compareAndSet(false, true)) {
diff --git a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
index 84e545851f49..f20d5be7c0ee 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/SparkListenerSuite.scala
@@ -24,6 +24,7 @@ import scala.collection.JavaConverters._
 
 import org.scalatest.Matchers
 
+import org.apache.spark.SparkException
 import org.apache.spark.executor.TaskMetrics
 import org.apache.spark.util.ResetSystemProperties
 import org.apache.spark.{LocalSparkContext, SparkConf, SparkContext, SparkFunSuite}
@@ -36,6 +37,21 @@ class SparkListenerSuite extends SparkFunSuite with LocalSparkContext with Match
 
   val jobCompletionTime = 1421191296660L
 
+  test("don't call sc.stop in listener") {
+    sc = new SparkContext("local", "SparkListenerSuite")
+    val listener = new SparkContextStoppingListener(sc)
+    val bus = new LiveListenerBus
+    bus.addListener(listener)
+
+    // Starting listener bus should flush all buffered events
+    bus.start(sc)
+    bus.post(SparkListenerJobEnd(0, jobCompletionTime, JobSucceeded))
+    bus.waitUntilEmpty(WAIT_TIMEOUT_MILLIS)
+
+    bus.stop()
+    assert(listener.sparkExSeen)
+  }
+
   test("basic creation and shutdown of LiveListenerBus") {
     val counter = new BasicJobCounter
     val bus = new LiveListenerBus
@@ -443,6 +459,21 @@ private class BasicJobCounter extends SparkListener {
   override def onJobEnd(job: SparkListenerJobEnd): Unit = count += 1
 }
 
+/**
+ * A simple listener that tries to stop SparkContext.
+ */
+private class SparkContextStoppingListener(val sc: SparkContext) extends SparkListener {
+  @volatile var sparkExSeen = false
+  override def onJobEnd(job: SparkListenerJobEnd): Unit = {
+    try {
+      sc.stop()
+    } catch {
+      case se: SparkException =>
+        sparkExSeen = true
+    }
+  }
+}
+
 private class ListenerThatAcceptsSparkConf(conf: SparkConf) extends SparkListener {
   var count = 0
   override def onJobEnd(job: SparkListenerJobEnd): Unit = count += 1

From f3152722791b163fa66597b3684009058195ba33 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 24 Nov 2015 12:54:37 -0800
Subject: [PATCH 878/896] [SPARK-11946][SQL] Audit pivot API for 1.6.

Currently pivot's signature looks like

```scala
scala.annotation.varargs
def pivot(pivotColumn: Column, values: Column*): GroupedData

scala.annotation.varargs
def pivot(pivotColumn: String, values: Any*): GroupedData
```

I think we can remove the one that takes "Column" types, since callers should always be passing in literals. It'd also be more clear if the values are not varargs, but rather Seq or java.util.List.

I also made similar changes for Python.

Author: Reynold Xin <rxin@databricks.com>

Closes #9929 from rxin/SPARK-11946.
---
 .../apache/spark/scheduler/DAGScheduler.scala |   1 -
 python/pyspark/sql/group.py                   |  12 +-
 .../sql/catalyst/expressions/literals.scala   |   1 +
 .../org/apache/spark/sql/GroupedData.scala    | 154 ++++++++++--------
 .../apache/spark/sql/JavaDataFrameSuite.java  |  16 ++
 .../spark/sql/DataFramePivotSuite.scala       |  21 +--
 .../apache/spark/sql/test/SQLTestData.scala   |   1 +
 7 files changed, 125 insertions(+), 81 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index ae725b467d8c..77a184dfe4be 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -1574,7 +1574,6 @@ class DAGScheduler(
   }
 
   def stop() {
-    logInfo("Stopping DAGScheduler")
     messageScheduler.shutdownNow()
     eventProcessLoop.stop()
     taskScheduler.stop()
diff --git a/python/pyspark/sql/group.py b/python/pyspark/sql/group.py
index 227f40bc3cf5..d8ed7eb2dda6 100644
--- a/python/pyspark/sql/group.py
+++ b/python/pyspark/sql/group.py
@@ -168,20 +168,24 @@ def sum(self, *cols):
         """
 
     @since(1.6)
-    def pivot(self, pivot_col, *values):
+    def pivot(self, pivot_col, values=None):
         """Pivots a column of the current DataFrame and preform the specified aggregation.
 
         :param pivot_col: Column to pivot
         :param values: Optional list of values of pivotColumn that will be translated to columns in
             the output data frame. If values are not provided the method with do an immediate call
             to .distinct() on the pivot column.
-        >>> df4.groupBy("year").pivot("course", "dotNET", "Java").sum("earnings").collect()
+
+        >>> df4.groupBy("year").pivot("course", ["dotNET", "Java"]).sum("earnings").collect()
         [Row(year=2012, dotNET=15000, Java=20000), Row(year=2013, dotNET=48000, Java=30000)]
+
         >>> df4.groupBy("year").pivot("course").sum("earnings").collect()
         [Row(year=2012, Java=20000, dotNET=15000), Row(year=2013, Java=30000, dotNET=48000)]
         """
-        jgd = self._jdf.pivot(_to_java_column(pivot_col),
-                              _to_seq(self.sql_ctx._sc, values, _create_column_from_literal))
+        if values is None:
+            jgd = self._jdf.pivot(pivot_col)
+        else:
+            jgd = self._jdf.pivot(pivot_col, values)
         return GroupedData(jgd, self.sql_ctx)
 
 
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
index e34fd49be838..68ec688c99f9 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/literals.scala
@@ -44,6 +44,7 @@ object Literal {
     case a: Array[Byte] => Literal(a, BinaryType)
     case i: CalendarInterval => Literal(i, CalendarIntervalType)
     case null => Literal(null, NullType)
+    case v: Literal => v
     case _ =>
       throw new RuntimeException("Unsupported literal type " + v.getClass + " " + v)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index 63dd7fbcbe9e..ee7150cbbfbc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -25,7 +25,7 @@ import org.apache.spark.sql.catalyst.analysis.{UnresolvedFunction, UnresolvedAli
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical.{Pivot, Rollup, Cube, Aggregate}
-import org.apache.spark.sql.types.{StringType, NumericType}
+import org.apache.spark.sql.types.NumericType
 
 
 /**
@@ -282,74 +282,96 @@ class GroupedData protected[sql](
   }
 
   /**
-    * (Scala-specific) Pivots a column of the current [[DataFrame]] and preform the specified
-    * aggregation.
-    * {{{
-    *   // Compute the sum of earnings for each year by course with each course as a separate column
-    *   df.groupBy($"year").pivot($"course", "dotNET", "Java").agg(sum($"earnings"))
-    *   // Or without specifying column values
-    *   df.groupBy($"year").pivot($"course").agg(sum($"earnings"))
-    * }}}
-    * @param pivotColumn Column to pivot
-    * @param values Optional list of values of pivotColumn that will be translated to columns in the
-    *               output data frame. If values are not provided the method with do an immediate
-    *               call to .distinct() on the pivot column.
-    * @since 1.6.0
-    */
-  @scala.annotation.varargs
-  def pivot(pivotColumn: Column, values: Column*): GroupedData = groupType match {
-    case _: GroupedData.PivotType =>
-      throw new UnsupportedOperationException("repeated pivots are not supported")
-    case GroupedData.GroupByType =>
-      val pivotValues = if (values.nonEmpty) {
-        values.map {
-          case Column(literal: Literal) => literal
-          case other =>
-            throw new UnsupportedOperationException(
-              s"The values of a pivot must be literals, found $other")
-        }
-      } else {
-        // This is to prevent unintended OOM errors when the number of distinct values is large
-        val maxValues = df.sqlContext.conf.getConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES)
-        // Get the distinct values of the column and sort them so its consistent
-        val values = df.select(pivotColumn)
-          .distinct()
-          .sort(pivotColumn)
-          .map(_.get(0))
-          .take(maxValues + 1)
-          .map(Literal(_)).toSeq
-        if (values.length > maxValues) {
-          throw new RuntimeException(
-            s"The pivot column $pivotColumn has more than $maxValues distinct values, " +
-              "this could indicate an error. " +
-              "If this was intended, set \"" + SQLConf.DATAFRAME_PIVOT_MAX_VALUES.key + "\" " +
-              s"to at least the number of distinct values of the pivot column.")
-        }
-        values
-      }
-      new GroupedData(df, groupingExprs, GroupedData.PivotType(pivotColumn.expr, pivotValues))
-    case _ =>
-      throw new UnsupportedOperationException("pivot is only supported after a groupBy")
+   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * There are two versions of pivot function: one that requires the caller to specify the list
+   * of distinct values to pivot on, and one that does not. The latter is more concise but less
+   * efficient, because Spark needs to first compute the list of distinct values internally.
+   *
+   * {{{
+   *   // Compute the sum of earnings for each year by course with each course as a separate column
+   *   df.groupBy("year").pivot("course", Seq("dotNET", "Java")).sum("earnings")
+   *
+   *   // Or without specifying column values (less efficient)
+   *   df.groupBy("year").pivot("course").sum("earnings")
+   * }}}
+   *
+   * @param pivotColumn Name of the column to pivot.
+   * @since 1.6.0
+   */
+  def pivot(pivotColumn: String): GroupedData = {
+    // This is to prevent unintended OOM errors when the number of distinct values is large
+    val maxValues = df.sqlContext.conf.getConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES)
+    // Get the distinct values of the column and sort them so its consistent
+    val values = df.select(pivotColumn)
+      .distinct()
+      .sort(pivotColumn)
+      .map(_.get(0))
+      .take(maxValues + 1)
+      .toSeq
+
+    if (values.length > maxValues) {
+      throw new AnalysisException(
+        s"The pivot column $pivotColumn has more than $maxValues distinct values, " +
+          "this could indicate an error. " +
+          s"If this was intended, set ${SQLConf.DATAFRAME_PIVOT_MAX_VALUES.key} " +
+          "to at least the number of distinct values of the pivot column.")
+    }
+
+    pivot(pivotColumn, values)
   }
 
   /**
-    * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
-    * {{{
-    *   // Compute the sum of earnings for each year by course with each course as a separate column
-    *   df.groupBy("year").pivot("course", "dotNET", "Java").sum("earnings")
-    *   // Or without specifying column values
-    *   df.groupBy("year").pivot("course").sum("earnings")
-    * }}}
-    * @param pivotColumn Column to pivot
-    * @param values Optional list of values of pivotColumn that will be translated to columns in the
-    *               output data frame. If values are not provided the method with do an immediate
-    *               call to .distinct() on the pivot column.
-    * @since 1.6.0
-    */
-  @scala.annotation.varargs
-  def pivot(pivotColumn: String, values: Any*): GroupedData = {
-    val resolvedPivotColumn = Column(df.resolve(pivotColumn))
-    pivot(resolvedPivotColumn, values.map(functions.lit): _*)
+   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * There are two versions of pivot function: one that requires the caller to specify the list
+   * of distinct values to pivot on, and one that does not. The latter is more concise but less
+   * efficient, because Spark needs to first compute the list of distinct values internally.
+   *
+   * {{{
+   *   // Compute the sum of earnings for each year by course with each course as a separate column
+   *   df.groupBy("year").pivot("course", Seq("dotNET", "Java")).sum("earnings")
+   *
+   *   // Or without specifying column values (less efficient)
+   *   df.groupBy("year").pivot("course").sum("earnings")
+   * }}}
+   *
+   * @param pivotColumn Name of the column to pivot.
+   * @param values List of values that will be translated to columns in the output DataFrame.
+   * @since 1.6.0
+   */
+  def pivot(pivotColumn: String, values: Seq[Any]): GroupedData = {
+    groupType match {
+      case GroupedData.GroupByType =>
+        new GroupedData(
+          df,
+          groupingExprs,
+          GroupedData.PivotType(df.resolve(pivotColumn), values.map(Literal.apply)))
+      case _: GroupedData.PivotType =>
+        throw new UnsupportedOperationException("repeated pivots are not supported")
+      case _ =>
+        throw new UnsupportedOperationException("pivot is only supported after a groupBy")
+    }
+  }
+
+  /**
+   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * There are two versions of pivot function: one that requires the caller to specify the list
+   * of distinct values to pivot on, and one that does not. The latter is more concise but less
+   * efficient, because Spark needs to first compute the list of distinct values internally.
+   *
+   * {{{
+   *   // Compute the sum of earnings for each year by course with each course as a separate column
+   *   df.groupBy("year").pivot("course", Arrays.<Object>asList("dotNET", "Java")).sum("earnings");
+   *
+   *   // Or without specifying column values (less efficient)
+   *   df.groupBy("year").pivot("course").sum("earnings");
+   * }}}
+   *
+   * @param pivotColumn Name of the column to pivot.
+   * @param values List of values that will be translated to columns in the output DataFrame.
+   * @since 1.6.0
+   */
+  def pivot(pivotColumn: String, values: java.util.List[Any]): GroupedData = {
+    pivot(pivotColumn, values.asScala)
   }
 }
 
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index 567bdddece80..a12fed3c0c6a 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -282,4 +282,20 @@ public void testSampleBy() {
     Assert.assertEquals(1, actual[1].getLong(0));
     Assert.assertTrue(2 <= actual[1].getLong(1) && actual[1].getLong(1) <= 13);
   }
+
+  @Test
+  public void pivot() {
+    DataFrame df = context.table("courseSales");
+    Row[] actual = df.groupBy("year")
+      .pivot("course", Arrays.<Object>asList("dotNET", "Java"))
+      .agg(sum("earnings")).orderBy("year").collect();
+
+    Assert.assertEquals(2012, actual[0].getInt(0));
+    Assert.assertEquals(15000.0, actual[0].getDouble(1), 0.01);
+    Assert.assertEquals(20000.0, actual[0].getDouble(2), 0.01);
+
+    Assert.assertEquals(2013, actual[1].getInt(0));
+    Assert.assertEquals(48000.0, actual[1].getDouble(1), 0.01);
+    Assert.assertEquals(30000.0, actual[1].getDouble(2), 0.01);
+  }
 }
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala
index 0c23d142670c..fc53aba68ebb 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFramePivotSuite.scala
@@ -25,7 +25,7 @@ class DataFramePivotSuite extends QueryTest with SharedSQLContext{
 
   test("pivot courses with literals") {
     checkAnswer(
-      courseSales.groupBy($"year").pivot($"course", lit("dotNET"), lit("Java"))
+      courseSales.groupBy("year").pivot("course", Seq("dotNET", "Java"))
         .agg(sum($"earnings")),
       Row(2012, 15000.0, 20000.0) :: Row(2013, 48000.0, 30000.0) :: Nil
     )
@@ -33,14 +33,15 @@ class DataFramePivotSuite extends QueryTest with SharedSQLContext{
 
   test("pivot year with literals") {
     checkAnswer(
-      courseSales.groupBy($"course").pivot($"year", lit(2012), lit(2013)).agg(sum($"earnings")),
+      courseSales.groupBy("course").pivot("year", Seq(2012, 2013)).agg(sum($"earnings")),
       Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
     )
   }
 
   test("pivot courses with literals and multiple aggregations") {
     checkAnswer(
-      courseSales.groupBy($"year").pivot($"course", lit("dotNET"), lit("Java"))
+      courseSales.groupBy($"year")
+        .pivot("course", Seq("dotNET", "Java"))
         .agg(sum($"earnings"), avg($"earnings")),
       Row(2012, 15000.0, 7500.0, 20000.0, 20000.0) ::
         Row(2013, 48000.0, 48000.0, 30000.0, 30000.0) :: Nil
@@ -49,14 +50,14 @@ class DataFramePivotSuite extends QueryTest with SharedSQLContext{
 
   test("pivot year with string values (cast)") {
     checkAnswer(
-      courseSales.groupBy("course").pivot("year", "2012", "2013").sum("earnings"),
+      courseSales.groupBy("course").pivot("year", Seq("2012", "2013")).sum("earnings"),
       Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
     )
   }
 
   test("pivot year with int values") {
     checkAnswer(
-      courseSales.groupBy("course").pivot("year", 2012, 2013).sum("earnings"),
+      courseSales.groupBy("course").pivot("year", Seq(2012, 2013)).sum("earnings"),
       Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
     )
   }
@@ -64,22 +65,22 @@ class DataFramePivotSuite extends QueryTest with SharedSQLContext{
   test("pivot courses with no values") {
     // Note Java comes before dotNet in sorted order
     checkAnswer(
-      courseSales.groupBy($"year").pivot($"course").agg(sum($"earnings")),
+      courseSales.groupBy("year").pivot("course").agg(sum($"earnings")),
       Row(2012, 20000.0, 15000.0) :: Row(2013, 30000.0, 48000.0) :: Nil
     )
   }
 
   test("pivot year with no values") {
     checkAnswer(
-      courseSales.groupBy($"course").pivot($"year").agg(sum($"earnings")),
+      courseSales.groupBy("course").pivot("year").agg(sum($"earnings")),
       Row("dotNET", 15000.0, 48000.0) :: Row("Java", 20000.0, 30000.0) :: Nil
     )
   }
 
-  test("pivot max values inforced") {
+  test("pivot max values enforced") {
     sqlContext.conf.setConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES, 1)
-    intercept[RuntimeException](
-      courseSales.groupBy($"year").pivot($"course")
+    intercept[AnalysisException](
+      courseSales.groupBy("year").pivot("course")
     )
     sqlContext.conf.setConf(SQLConf.DATAFRAME_PIVOT_MAX_VALUES,
       SQLConf.DATAFRAME_PIVOT_MAX_VALUES.defaultValue.get)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala b/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
index abad0d7eaaed..83c63e04f344 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/test/SQLTestData.scala
@@ -281,6 +281,7 @@ private[sql] trait SQLTestData { self =>
     person
     salary
     complexData
+    courseSales
   }
 }
 

From e6dd237463d2de8c506f0735dfdb3f43e8122513 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Tue, 24 Nov 2015 15:08:02 -0600
Subject: [PATCH 879/896] [SPARK-11929][CORE] Make the repl log4j configuration
 override the root logger.

In the default Spark distribution, there are currently two separate
log4j config files, with different default values for the root logger,
so that when running the shell you have a different default log level.
This makes the shell more usable, since the logs don't overwhelm the
output.

But if you install a custom log4j.properties, you lose that, because
then it's going to be used no matter whether you're running a regular
app or the shell.

With this change, the overriding of the log level is done differently;
the log level repl's main class (org.apache.spark.repl.Main) is used
to define the root logger's level when running the shell, defaulting
to WARN if it's not set explicitly.

On a somewhat related change, the shell output about the "sc" variable
was changed a bit to contain a little more useful information about
the application, since when the root logger's log level is WARN, that
information is never shown to the user.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9816 from vanzin/shell-logging.
---
 conf/log4j.properties.template                |  5 +++
 .../spark/log4j-defaults-repl.properties      | 33 --------------
 .../apache/spark/log4j-defaults.properties    |  5 +++
 .../main/scala/org/apache/spark/Logging.scala | 45 ++++++++++---------
 .../apache/spark/repl/SparkILoopInit.scala    | 21 ++++-----
 .../org/apache/spark/repl/SparkILoop.scala    | 25 ++++++-----
 6 files changed, 57 insertions(+), 77 deletions(-)
 delete mode 100644 core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties

diff --git a/conf/log4j.properties.template b/conf/log4j.properties.template
index f3046be54d7c..9809b0c82848 100644
--- a/conf/log4j.properties.template
+++ b/conf/log4j.properties.template
@@ -22,6 +22,11 @@ log4j.appender.console.target=System.err
 log4j.appender.console.layout=org.apache.log4j.PatternLayout
 log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
 
+# Set the default spark-shell log level to WARN. When running the spark-shell, the
+# log level for this class is used to overwrite the root logger's log level, so that
+# the user can have different defaults for the shell and regular Spark apps.
+log4j.logger.org.apache.spark.repl.Main=WARN
+
 # Settings to quiet third party logs that are too verbose
 log4j.logger.org.spark-project.jetty=WARN
 log4j.logger.org.spark-project.jetty.util.component.AbstractLifeCycle=ERROR
diff --git a/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties b/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties
deleted file mode 100644
index c85abc35b93b..000000000000
--- a/core/src/main/resources/org/apache/spark/log4j-defaults-repl.properties
+++ /dev/null
@@ -1,33 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one or more
-# contributor license agreements.  See the NOTICE file distributed with
-# this work for additional information regarding copyright ownership.
-# The ASF licenses this file to You under the Apache License, Version 2.0
-# (the "License"); you may not use this file except in compliance with
-# the License.  You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-# Set everything to be logged to the console
-log4j.rootCategory=WARN, console
-log4j.appender.console=org.apache.log4j.ConsoleAppender
-log4j.appender.console.target=System.err
-log4j.appender.console.layout=org.apache.log4j.PatternLayout
-log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
-
-# Settings to quiet third party logs that are too verbose
-log4j.logger.org.spark-project.jetty=WARN
-log4j.logger.org.spark-project.jetty.util.component.AbstractLifeCycle=ERROR
-log4j.logger.org.apache.spark.repl.SparkIMain$exprTyper=INFO
-log4j.logger.org.apache.spark.repl.SparkILoop$SparkILoopInterpreter=INFO
-
-# SPARK-9183: Settings to avoid annoying messages when looking up nonexistent UDFs in SparkSQL with Hive support
-log4j.logger.org.apache.hadoop.hive.metastore.RetryingHMSHandler=FATAL
-log4j.logger.org.apache.hadoop.hive.ql.exec.FunctionRegistry=ERROR
diff --git a/core/src/main/resources/org/apache/spark/log4j-defaults.properties b/core/src/main/resources/org/apache/spark/log4j-defaults.properties
index d44cc85dcbd8..0750488e4adf 100644
--- a/core/src/main/resources/org/apache/spark/log4j-defaults.properties
+++ b/core/src/main/resources/org/apache/spark/log4j-defaults.properties
@@ -22,6 +22,11 @@ log4j.appender.console.target=System.err
 log4j.appender.console.layout=org.apache.log4j.PatternLayout
 log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n
 
+# Set the default spark-shell log level to WARN. When running the spark-shell, the
+# log level for this class is used to overwrite the root logger's log level, so that
+# the user can have different defaults for the shell and regular Spark apps.
+log4j.logger.org.apache.spark.repl.Main=WARN
+
 # Settings to quiet third party logs that are too verbose
 log4j.logger.org.spark-project.jetty=WARN
 log4j.logger.org.spark-project.jetty.util.component.AbstractLifeCycle=ERROR
diff --git a/core/src/main/scala/org/apache/spark/Logging.scala b/core/src/main/scala/org/apache/spark/Logging.scala
index 69f6e06ee005..e35e158c7e8a 100644
--- a/core/src/main/scala/org/apache/spark/Logging.scala
+++ b/core/src/main/scala/org/apache/spark/Logging.scala
@@ -17,7 +17,7 @@
 
 package org.apache.spark
 
-import org.apache.log4j.{LogManager, PropertyConfigurator}
+import org.apache.log4j.{Level, LogManager, PropertyConfigurator}
 import org.slf4j.{Logger, LoggerFactory}
 import org.slf4j.impl.StaticLoggerBinder
 
@@ -119,30 +119,31 @@ trait Logging {
     val usingLog4j12 = "org.slf4j.impl.Log4jLoggerFactory".equals(binderClass)
     if (usingLog4j12) {
       val log4j12Initialized = LogManager.getRootLogger.getAllAppenders.hasMoreElements
+      // scalastyle:off println
       if (!log4j12Initialized) {
-        // scalastyle:off println
-        if (Utils.isInInterpreter) {
-          val replDefaultLogProps = "org/apache/spark/log4j-defaults-repl.properties"
-          Option(Utils.getSparkClassLoader.getResource(replDefaultLogProps)) match {
-            case Some(url) =>
-              PropertyConfigurator.configure(url)
-              System.err.println(s"Using Spark's repl log4j profile: $replDefaultLogProps")
-              System.err.println("To adjust logging level use sc.setLogLevel(\"INFO\")")
-            case None =>
-              System.err.println(s"Spark was unable to load $replDefaultLogProps")
-          }
-        } else {
-          val defaultLogProps = "org/apache/spark/log4j-defaults.properties"
-          Option(Utils.getSparkClassLoader.getResource(defaultLogProps)) match {
-            case Some(url) =>
-              PropertyConfigurator.configure(url)
-              System.err.println(s"Using Spark's default log4j profile: $defaultLogProps")
-            case None =>
-              System.err.println(s"Spark was unable to load $defaultLogProps")
-          }
+        val defaultLogProps = "org/apache/spark/log4j-defaults.properties"
+        Option(Utils.getSparkClassLoader.getResource(defaultLogProps)) match {
+          case Some(url) =>
+            PropertyConfigurator.configure(url)
+            System.err.println(s"Using Spark's default log4j profile: $defaultLogProps")
+          case None =>
+            System.err.println(s"Spark was unable to load $defaultLogProps")
         }
-        // scalastyle:on println
       }
+
+      if (Utils.isInInterpreter) {
+        // Use the repl's main class to define the default log level when running the shell,
+        // overriding the root logger's config if they're different.
+        val rootLogger = LogManager.getRootLogger()
+        val replLogger = LogManager.getLogger("org.apache.spark.repl.Main")
+        val replLevel = Option(replLogger.getLevel()).getOrElse(Level.WARN)
+        if (replLevel != rootLogger.getEffectiveLevel()) {
+          System.err.printf("Setting default log level to \"%s\".\n", replLevel)
+          System.err.println("To adjust logging level use sc.setLogLevel(newLevel).")
+          rootLogger.setLevel(replLevel)
+        }
+      }
+      // scalastyle:on println
     }
     Logging.initialized = true
 
diff --git a/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkILoopInit.scala b/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkILoopInit.scala
index bd3314d94eed..99e1e1df33fd 100644
--- a/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkILoopInit.scala
+++ b/repl/scala-2.10/src/main/scala/org/apache/spark/repl/SparkILoopInit.scala
@@ -123,18 +123,19 @@ private[repl] trait SparkILoopInit {
   def initializeSpark() {
     intp.beQuietDuring {
       command("""
-         @transient val sc = {
-           val _sc = org.apache.spark.repl.Main.interp.createSparkContext()
-           println("Spark context available as sc.")
-           _sc
-         }
+        @transient val sc = {
+          val _sc = org.apache.spark.repl.Main.interp.createSparkContext()
+          println("Spark context available as sc " +
+            s"(master = ${_sc.master}, app id = ${_sc.applicationId}).")
+          _sc
+        }
         """)
       command("""
-         @transient val sqlContext = {
-           val _sqlContext = org.apache.spark.repl.Main.interp.createSQLContext()
-           println("SQL context available as sqlContext.")
-           _sqlContext
-         }
+        @transient val sqlContext = {
+          val _sqlContext = org.apache.spark.repl.Main.interp.createSQLContext()
+          println("SQL context available as sqlContext.")
+          _sqlContext
+        }
         """)
       command("import org.apache.spark.SparkContext._")
       command("import sqlContext.implicits._")
diff --git a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
index 33d262558b1f..e91139fb29f6 100644
--- a/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
+++ b/repl/scala-2.11/src/main/scala/org/apache/spark/repl/SparkILoop.scala
@@ -37,18 +37,19 @@ class SparkILoop(in0: Option[BufferedReader], out: JPrintWriter)
   def initializeSpark() {
     intp.beQuietDuring {
       processLine("""
-         @transient val sc = {
-           val _sc = org.apache.spark.repl.Main.createSparkContext()
-           println("Spark context available as sc.")
-           _sc
-         }
+        @transient val sc = {
+          val _sc = org.apache.spark.repl.Main.createSparkContext()
+          println("Spark context available as sc " +
+            s"(master = ${_sc.master}, app id = ${_sc.applicationId}).")
+          _sc
+        }
         """)
       processLine("""
-         @transient val sqlContext = {
-           val _sqlContext = org.apache.spark.repl.Main.createSQLContext()
-           println("SQL context available as sqlContext.")
-           _sqlContext
-         }
+        @transient val sqlContext = {
+          val _sqlContext = org.apache.spark.repl.Main.createSQLContext()
+          println("SQL context available as sqlContext.")
+          _sqlContext
+        }
         """)
       processLine("import org.apache.spark.SparkContext._")
       processLine("import sqlContext.implicits._")
@@ -85,7 +86,7 @@ class SparkILoop(in0: Option[BufferedReader], out: JPrintWriter)
   /** Available commands */
   override def commands: List[LoopCommand] = sparkStandardCommands
 
-  /** 
+  /**
    * We override `loadFiles` because we need to initialize Spark *before* the REPL
    * sees any files, so that the Spark context is visible in those files. This is a bit of a
    * hack, but there isn't another hook available to us at this point.
@@ -98,7 +99,7 @@ class SparkILoop(in0: Option[BufferedReader], out: JPrintWriter)
 
 object SparkILoop {
 
-  /** 
+  /**
    * Creates an interpreter loop with default settings and feeds
    * the given code to it as input.
    */

From 58d9b260556a89a3d0832d583acafba1df7c6751 Mon Sep 17 00:00:00 2001
From: Davies Liu <davies@databricks.com>
Date: Tue, 24 Nov 2015 14:33:28 -0800
Subject: [PATCH 880/896] [SPARK-11805] free the array in UnsafeExternalSorter
 during spilling

After calling spill() on SortedIterator, the array inside InMemorySorter is not needed, it should be freed during spilling, this could help to join multiple tables with limited memory.

Author: Davies Liu <davies@databricks.com>

Closes #9793 from davies/free_array.
---
 .../unsafe/sort/UnsafeExternalSorter.java     | 10 +++---
 .../unsafe/sort/UnsafeInMemorySorter.java     | 31 ++++++++-----------
 2 files changed, 19 insertions(+), 22 deletions(-)

diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
index 9a7b2ad06cab..2e4031267473 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeExternalSorter.java
@@ -468,6 +468,12 @@ public long spill() throws IOException {
           }
           allocatedPages.clear();
         }
+
+        // in-memory sorter will not be used after spilling
+        assert(inMemSorter != null);
+        released += inMemSorter.getMemoryUsage();
+        inMemSorter.free();
+        inMemSorter = null;
         return released;
       }
     }
@@ -489,10 +495,6 @@ public void loadNext() throws IOException {
           }
           upstream = nextUpstream;
           nextUpstream = null;
-
-          assert(inMemSorter != null);
-          inMemSorter.free();
-          inMemSorter = null;
         }
         numRecords--;
         upstream.loadNext();
diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
index a218ad4623f4..dce1f15a2963 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeInMemorySorter.java
@@ -108,6 +108,7 @@ public UnsafeInMemorySorter(
    */
   public void free() {
     consumer.freeArray(array);
+    array = null;
   }
 
   public void reset() {
@@ -160,28 +161,22 @@ public void insertRecord(long recordPointer, long keyPrefix) {
     pos++;
   }
 
-  public static final class SortedIterator extends UnsafeSorterIterator {
+  public final class SortedIterator extends UnsafeSorterIterator {
 
-    private final TaskMemoryManager memoryManager;
-    private final int sortBufferInsertPosition;
-    private final LongArray sortBuffer;
-    private int position = 0;
+    private final int numRecords;
+    private int position;
     private Object baseObject;
     private long baseOffset;
     private long keyPrefix;
     private int recordLength;
 
-    private SortedIterator(
-        TaskMemoryManager memoryManager,
-        int sortBufferInsertPosition,
-        LongArray sortBuffer) {
-      this.memoryManager = memoryManager;
-      this.sortBufferInsertPosition = sortBufferInsertPosition;
-      this.sortBuffer = sortBuffer;
+    private SortedIterator(int numRecords) {
+      this.numRecords = numRecords;
+      this.position = 0;
     }
 
     public SortedIterator clone () {
-      SortedIterator iter = new SortedIterator(memoryManager, sortBufferInsertPosition, sortBuffer);
+      SortedIterator iter = new SortedIterator(numRecords);
       iter.position = position;
       iter.baseObject = baseObject;
       iter.baseOffset = baseOffset;
@@ -192,21 +187,21 @@ public SortedIterator clone () {
 
     @Override
     public boolean hasNext() {
-      return position < sortBufferInsertPosition;
+      return position / 2 < numRecords;
     }
 
     public int numRecordsLeft() {
-      return (sortBufferInsertPosition - position) / 2;
+      return numRecords - position / 2;
     }
 
     @Override
     public void loadNext() {
       // This pointer points to a 4-byte record length, followed by the record's bytes
-      final long recordPointer = sortBuffer.get(position);
+      final long recordPointer = array.get(position);
       baseObject = memoryManager.getPage(recordPointer);
       baseOffset = memoryManager.getOffsetInPage(recordPointer) + 4;  // Skip over record length
       recordLength = Platform.getInt(baseObject, baseOffset - 4);
-      keyPrefix = sortBuffer.get(position + 1);
+      keyPrefix = array.get(position + 1);
       position += 2;
     }
 
@@ -229,6 +224,6 @@ public void loadNext() {
    */
   public SortedIterator getSortedIterator() {
     sorter.sort(array, 0, pos / 2, sortComparator);
-    return new SortedIterator(memoryManager, pos, array);
+    return new SortedIterator(pos / 2);
   }
 }

From 34ca392da7097a1fbe48cd6c3ebff51453ca26ca Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 24 Nov 2015 14:51:01 -0800
Subject: [PATCH 881/896] Added a line of comment to explain why the extra sort
 exists in pivot.

---
 sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index ee7150cbbfbc..abd531c4ba54 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -304,7 +304,7 @@ class GroupedData protected[sql](
     // Get the distinct values of the column and sort them so its consistent
     val values = df.select(pivotColumn)
       .distinct()
-      .sort(pivotColumn)
+      .sort(pivotColumn)  // ensure that the output columns are in a consistent logical order
       .map(_.get(0))
       .take(maxValues + 1)
       .toSeq

From c7f95df5c6d8eb2e6f11cf58b704fea34326a5f2 Mon Sep 17 00:00:00 2001
From: Cheng Lian <lian@databricks.com>
Date: Tue, 24 Nov 2015 14:59:14 -0800
Subject: [PATCH 882/896] [SPARK-11783][SQL] Fixes execution Hive client when
 using remote Hive metastore

When using remote Hive metastore, `hive.metastore.uris` is set to the metastore URI.  However, it overrides `javax.jdo.option.ConnectionURL` unexpectedly, thus the execution Hive client connects to the actual remote Hive metastore instead of the Derby metastore created in the temporary directory.  Cleaning this configuration for the execution Hive client fixes this issue.

Author: Cheng Lian <lian@databricks.com>

Closes #9895 from liancheng/spark-11783.clean-remote-metastore-config.
---
 .../org/apache/spark/sql/hive/HiveContext.scala   | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
index c0bb5af7d5c8..8a4264194ae8 100644
--- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
+++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala
@@ -736,6 +736,21 @@ private[hive] object HiveContext {
       s"jdbc:derby:;databaseName=${localMetastore.getAbsolutePath};create=true")
     propMap.put("datanucleus.rdbms.datastoreAdapterClassName",
       "org.datanucleus.store.rdbms.adapter.DerbyAdapter")
+
+    // SPARK-11783: When "hive.metastore.uris" is set, the metastore connection mode will be
+    // remote (https://cwiki.apache.org/confluence/display/Hive/AdminManual+MetastoreAdmin
+    // mentions that "If hive.metastore.uris is empty local mode is assumed, remote otherwise").
+    // Remote means that the metastore server is running in its own process.
+    // When the mode is remote, configurations like "javax.jdo.option.ConnectionURL" will not be
+    // used (because they are used by remote metastore server that talks to the database).
+    // Because execution Hive should always connects to a embedded derby metastore.
+    // We have to remove the value of hive.metastore.uris. So, the execution Hive client connects
+    // to the actual embedded derby metastore instead of the remote metastore.
+    // You can search HiveConf.ConfVars.METASTOREURIS in the code of HiveConf (in Hive's repo).
+    // Then, you will find that the local metastore mode is only set to true when
+    // hive.metastore.uris is not set.
+    propMap.put(ConfVars.METASTOREURIS.varname, "")
+
     propMap.toMap
   }
 

From 238ae51b66ac12d15fba6aff061804004c5ca6cb Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Tue, 24 Nov 2015 15:54:10 -0800
Subject: [PATCH 883/896] [SPARK-11914][SQL] Support coalesce and repartition
 in Dataset APIs

This PR is to provide two common `coalesce` and `repartition` in Dataset APIs.

After reading the comments of SPARK-9999, I am unclear about the plan for supporting re-partitioning in Dataset APIs. Currently, both RDD APIs and Dataframe APIs provide users such a flexibility to control the number of partitions.

In most traditional RDBMS, they expose the number of partitions, the partitioning columns, the table partitioning methods to DBAs for performance tuning and storage planning. Normally, these parameters could largely affect the query performance. Since the actual performance depends on the workload types, I think it is almost impossible to automate the discovery of the best partitioning strategy for all the scenarios.

I am wondering if Dataset APIs are planning to hide these APIs from users? Feel free to reject my PR if it does not match the plan.

Thank you for your answers. marmbrus rxin cloud-fan

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9899 from gatorsmile/coalesce.
---
 .../scala/org/apache/spark/sql/Dataset.scala  | 19 +++++++++++++++++++
 .../org/apache/spark/sql/DatasetSuite.scala   | 15 +++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 07647508421a..17e2611790d5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -152,6 +152,25 @@ class Dataset[T] private[sql](
    */
   def count(): Long = toDF().count()
 
+  /**
+    * Returns a new [[Dataset]] that has exactly `numPartitions` partitions.
+    * @since 1.6.0
+    */
+  def repartition(numPartitions: Int): Dataset[T] = withPlan {
+    Repartition(numPartitions, shuffle = true, _)
+  }
+
+  /**
+    * Returns a new [[Dataset]] that has exactly `numPartitions` partitions.
+    * Similar to coalesce defined on an [[RDD]], this operation results in a narrow dependency, e.g.
+    * if you go from 1000 partitions to 100 partitions, there will not be a shuffle, instead each of
+    * the 100 new partitions will claim 10 of the current partitions.
+    * @since 1.6.0
+    */
+  def coalesce(numPartitions: Int): Dataset[T] = withPlan {
+    Repartition(numPartitions, shuffle = false, _)
+  }
+
   /* *********************** *
    *  Functional Operations  *
    * *********************** */
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index 13eede1b17d8..c253fdbb8c99 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -52,6 +52,21 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     assert(ds.takeAsList(1).get(0) == item)
   }
 
+  test("coalesce, repartition") {
+    val data = (1 to 100).map(i => ClassData(i.toString, i))
+    val ds = data.toDS()
+
+    assert(ds.repartition(10).rdd.partitions.length == 10)
+    checkAnswer(
+      ds.repartition(10),
+      data: _*)
+
+    assert(ds.coalesce(1).rdd.partitions.length == 1)
+    checkAnswer(
+      ds.coalesce(1),
+      data: _*)
+  }
+
   test("as tuple") {
     val data = Seq(("a", 1), ("b", 2)).toDF("a", "b")
     checkAnswer(

From 25bbd3c16e8e8be4d2c43000223d54650e9a3696 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 24 Nov 2015 18:16:07 -0800
Subject: [PATCH 884/896] [SPARK-11967][SQL] Consistent use of varargs for
 multiple paths in DataFrameReader

This patch makes it consistent to use varargs in all DataFrameReader methods, including Parquet, JSON, text, and the generic load function.

Also added a few more API tests for the Java API.

Author: Reynold Xin <rxin@databricks.com>

Closes #9945 from rxin/SPARK-11967.
---
 python/pyspark/sql/readwriter.py              | 19 ++++++----
 .../apache/spark/sql/DataFrameReader.scala    | 36 +++++++++++++++----
 .../apache/spark/sql/JavaDataFrameSuite.java  | 23 ++++++++++++
 sql/core/src/test/resources/text-suite2.txt   |  1 +
 .../org/apache/spark/sql/DataFrameSuite.scala |  2 +-
 5 files changed, 66 insertions(+), 15 deletions(-)
 create mode 100644 sql/core/src/test/resources/text-suite2.txt

diff --git a/python/pyspark/sql/readwriter.py b/python/pyspark/sql/readwriter.py
index e8f0d7ec7703..2e75f0c8a182 100644
--- a/python/pyspark/sql/readwriter.py
+++ b/python/pyspark/sql/readwriter.py
@@ -109,7 +109,7 @@ def options(self, **options):
     def load(self, path=None, format=None, schema=None, **options):
         """Loads data from a data source and returns it as a :class`DataFrame`.
 
-        :param path: optional string for file-system backed data sources.
+        :param path: optional string or a list of string for file-system backed data sources.
         :param format: optional string for format of the data source. Default to 'parquet'.
         :param schema: optional :class:`StructType` for the input schema.
         :param options: all other string options
@@ -118,6 +118,7 @@ def load(self, path=None, format=None, schema=None, **options):
         ...     opt2=1, opt3='str')
         >>> df.dtypes
         [('name', 'string'), ('year', 'int'), ('month', 'int'), ('day', 'int')]
+
         >>> df = sqlContext.read.format('json').load(['python/test_support/sql/people.json',
         ...     'python/test_support/sql/people1.json'])
         >>> df.dtypes
@@ -130,10 +131,8 @@ def load(self, path=None, format=None, schema=None, **options):
         self.options(**options)
         if path is not None:
             if type(path) == list:
-                paths = path
-                gateway = self._sqlContext._sc._gateway
-                jpaths = utils.toJArray(gateway, gateway.jvm.java.lang.String, paths)
-                return self._df(self._jreader.load(jpaths))
+                return self._df(
+                    self._jreader.load(self._sqlContext._sc._jvm.PythonUtils.toSeq(path)))
             else:
                 return self._df(self._jreader.load(path))
         else:
@@ -175,6 +174,8 @@ def json(self, path, schema=None):
             self.schema(schema)
         if isinstance(path, basestring):
             return self._df(self._jreader.json(path))
+        elif type(path) == list:
+            return self._df(self._jreader.json(self._sqlContext._sc._jvm.PythonUtils.toSeq(path)))
         elif isinstance(path, RDD):
             return self._df(self._jreader.json(path._jrdd))
         else:
@@ -205,16 +206,20 @@ def parquet(self, *paths):
 
     @ignore_unicode_prefix
     @since(1.6)
-    def text(self, path):
+    def text(self, paths):
         """Loads a text file and returns a [[DataFrame]] with a single string column named "text".
 
         Each line in the text file is a new row in the resulting DataFrame.
 
+        :param paths: string, or list of strings, for input path(s).
+
         >>> df = sqlContext.read.text('python/test_support/sql/text-test.txt')
         >>> df.collect()
         [Row(value=u'hello'), Row(value=u'this')]
         """
-        return self._df(self._jreader.text(path))
+        if isinstance(paths, basestring):
+            paths = [paths]
+        return self._df(self._jreader.text(self._sqlContext._sc._jvm.PythonUtils.toSeq(paths)))
 
     @since(1.5)
     def orc(self, path):
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
index dcb3737b70fb..3ed1e55adec6 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala
@@ -24,17 +24,17 @@ import scala.collection.JavaConverters._
 import org.apache.hadoop.fs.Path
 import org.apache.hadoop.util.StringUtils
 
+import org.apache.spark.{Logging, Partition}
 import org.apache.spark.annotation.Experimental
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.deploy.SparkHadoopUtil
 import org.apache.spark.rdd.RDD
+import org.apache.spark.sql.catalyst.SqlParser
 import org.apache.spark.sql.execution.datasources.jdbc.{JDBCPartition, JDBCPartitioningInfo, JDBCRelation}
-import org.apache.spark.sql.execution.datasources.json.{JSONOptions, JSONRelation}
+import org.apache.spark.sql.execution.datasources.json.JSONRelation
 import org.apache.spark.sql.execution.datasources.parquet.ParquetRelation
 import org.apache.spark.sql.execution.datasources.{LogicalRelation, ResolvedDataSource}
 import org.apache.spark.sql.types.StructType
-import org.apache.spark.{Logging, Partition}
-import org.apache.spark.sql.catalyst.{SqlParser, TableIdentifier}
 
 /**
  * :: Experimental ::
@@ -104,6 +104,7 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    *
    * @since 1.4.0
    */
+  // TODO: Remove this one in Spark 2.0.
   def load(path: String): DataFrame = {
     option("path", path).load()
   }
@@ -130,7 +131,8 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    *
    * @since 1.6.0
    */
-  def load(paths: Array[String]): DataFrame = {
+  @scala.annotation.varargs
+  def load(paths: String*): DataFrame = {
     option("paths", paths.map(StringUtils.escapeString(_, '\\', ',')).mkString(",")).load()
   }
 
@@ -236,11 +238,30 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    * <li>`allowNumericLeadingZeros` (default `false`): allows leading zeros in numbers
    * (e.g. 00012)</li>
    *
-   * @param path input path
    * @since 1.4.0
    */
+  // TODO: Remove this one in Spark 2.0.
   def json(path: String): DataFrame = format("json").load(path)
 
+  /**
+   * Loads a JSON file (one object per line) and returns the result as a [[DataFrame]].
+   *
+   * This function goes through the input once to determine the input schema. If you know the
+   * schema in advance, use the version that specifies the schema to avoid the extra scan.
+   *
+   * You can set the following JSON-specific options to deal with non-standard JSON files:
+   * <li>`primitivesAsString` (default `false`): infers all primitive values as a string type</li>
+   * <li>`allowComments` (default `false`): ignores Java/C++ style comment in JSON records</li>
+   * <li>`allowUnquotedFieldNames` (default `false`): allows unquoted JSON field names</li>
+   * <li>`allowSingleQuotes` (default `true`): allows single quotes in addition to double quotes
+   * </li>
+   * <li>`allowNumericLeadingZeros` (default `false`): allows leading zeros in numbers
+   * (e.g. 00012)</li>
+   *
+   * @since 1.6.0
+   */
+  def json(paths: String*): DataFrame = format("json").load(paths : _*)
+
   /**
    * Loads an `JavaRDD[String]` storing JSON objects (one object per record) and
    * returns the result as a [[DataFrame]].
@@ -328,10 +349,11 @@ class DataFrameReader private[sql](sqlContext: SQLContext) extends Logging {
    *   sqlContext.read().text("/path/to/spark/README.md")
    * }}}
    *
-   * @param path input path
+   * @param paths input path
    * @since 1.6.0
    */
-  def text(path: String): DataFrame = format("text").load(path)
+  @scala.annotation.varargs
+  def text(paths: String*): DataFrame = format("text").load(paths : _*)
 
   ///////////////////////////////////////////////////////////////////////////////////////
   // Builder pattern config options
diff --git a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
index a12fed3c0c6a..8e0b2dbca4a9 100644
--- a/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
+++ b/sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java
@@ -298,4 +298,27 @@ public void pivot() {
     Assert.assertEquals(48000.0, actual[1].getDouble(1), 0.01);
     Assert.assertEquals(30000.0, actual[1].getDouble(2), 0.01);
   }
+
+  public void testGenericLoad() {
+    DataFrame df1 = context.read().format("text").load(
+      Thread.currentThread().getContextClassLoader().getResource("text-suite.txt").toString());
+    Assert.assertEquals(4L, df1.count());
+
+    DataFrame df2 = context.read().format("text").load(
+      Thread.currentThread().getContextClassLoader().getResource("text-suite.txt").toString(),
+      Thread.currentThread().getContextClassLoader().getResource("text-suite2.txt").toString());
+    Assert.assertEquals(5L, df2.count());
+  }
+
+  @Test
+  public void testTextLoad() {
+    DataFrame df1 = context.read().text(
+      Thread.currentThread().getContextClassLoader().getResource("text-suite.txt").toString());
+    Assert.assertEquals(4L, df1.count());
+
+    DataFrame df2 = context.read().text(
+      Thread.currentThread().getContextClassLoader().getResource("text-suite.txt").toString(),
+      Thread.currentThread().getContextClassLoader().getResource("text-suite2.txt").toString());
+    Assert.assertEquals(5L, df2.count());
+  }
 }
diff --git a/sql/core/src/test/resources/text-suite2.txt b/sql/core/src/test/resources/text-suite2.txt
new file mode 100644
index 000000000000..f9d498c80493
--- /dev/null
+++ b/sql/core/src/test/resources/text-suite2.txt
@@ -0,0 +1 @@
+This is another file for testing multi path loading.
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
index dd6d06512ff6..76e9648aa753 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala
@@ -897,7 +897,7 @@ class DataFrameSuite extends QueryTest with SharedSQLContext {
       val dir2 = new File(dir, "dir2").getCanonicalPath
       df2.write.format("json").save(dir2)
 
-      checkAnswer(sqlContext.read.format("json").load(Array(dir1, dir2)),
+      checkAnswer(sqlContext.read.format("json").load(dir1, dir2),
         Row(1, 22) :: Row(2, 23) :: Nil)
 
       checkAnswer(sqlContext.read.format("json").load(dir1),

From 4d6bbbc03ddb6650b00eb638e4876a196014c19c Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 24 Nov 2015 18:58:55 -0800
Subject: [PATCH 885/896] [SPARK-11947][SQL] Mark deprecated methods with "This
 will be removed in Spark 2.0."

Also fixed some documentation as I saw them.

Author: Reynold Xin <rxin@databricks.com>

Closes #9930 from rxin/SPARK-11947.
---
 project/MimaExcludes.scala                    |  3 +-
 .../scala/org/apache/spark/sql/Column.scala   | 20 +++--
 .../org/apache/spark/sql/DataFrame.scala      | 72 +++++++++------
 .../scala/org/apache/spark/sql/Dataset.scala  |  1 +
 .../org/apache/spark/sql/SQLContext.scala     | 88 ++++++++++---------
 .../org/apache/spark/sql/SQLImplicits.scala   | 25 +++++-
 .../sql/{ => execution}/SparkSQLParser.scala  | 15 ++--
 .../org/apache/spark/sql/functions.scala      | 52 ++++++-----
 .../SimpleTextHadoopFsRelationSuite.scala     |  6 +-
 9 files changed, 172 insertions(+), 110 deletions(-)
 rename sql/core/src/main/scala/org/apache/spark/sql/{ => execution}/SparkSQLParser.scala (89%)

diff --git a/project/MimaExcludes.scala b/project/MimaExcludes.scala
index bb45d1bb1214..54a9ad956d11 100644
--- a/project/MimaExcludes.scala
+++ b/project/MimaExcludes.scala
@@ -108,7 +108,8 @@ object MimaExcludes {
         ProblemFilters.exclude[MissingClassProblem](
           "org.apache.spark.rdd.MapPartitionsWithPreparationRDD"),
         ProblemFilters.exclude[MissingClassProblem](
-          "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$")
+          "org.apache.spark.rdd.MapPartitionsWithPreparationRDD$"),
+        ProblemFilters.exclude[MissingClassProblem]("org.apache.spark.sql.SparkSQLParser")
       ) ++ Seq(
         // SPARK-11485
         ProblemFilters.exclude[MissingMethodProblem]("org.apache.spark.sql.DataFrameHolder.df"),
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
index 30c554a85e69..b3cd9e1eff14 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Column.scala
@@ -42,7 +42,8 @@ private[sql] object Column {
 
 /**
  * A [[Column]] where an [[Encoder]] has been given for the expected input and return type.
- * @since 1.6.0
+ * To create a [[TypedColumn]], use the `as` function on a [[Column]].
+ *
  * @tparam T The input type expected for this expression.  Can be `Any` if the expression is type
  *           checked by the analyzer instead of the compiler (i.e. `expr("sum(...)")`).
  * @tparam U The output type of this column.
@@ -51,7 +52,8 @@ private[sql] object Column {
  */
 class TypedColumn[-T, U](
     expr: Expression,
-    private[sql] val encoder: ExpressionEncoder[U]) extends Column(expr) {
+    private[sql] val encoder: ExpressionEncoder[U])
+  extends Column(expr) {
 
   /**
    * Inserts the specific input type and schema into any expressions that are expected to operate
@@ -61,12 +63,11 @@ class TypedColumn[-T, U](
       inputEncoder: ExpressionEncoder[_],
       schema: Seq[Attribute]): TypedColumn[T, U] = {
     val boundEncoder = inputEncoder.bind(schema).asInstanceOf[ExpressionEncoder[Any]]
-    new TypedColumn[T, U] (expr transform {
-      case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
-        ta.copy(
-          aEncoder = Some(boundEncoder),
-          children = schema)
-    }, encoder)
+    new TypedColumn[T, U](
+      expr transform { case ta: TypedAggregateExpression if ta.aEncoder.isEmpty =>
+        ta.copy(aEncoder = Some(boundEncoder), children = schema)
+      },
+      encoder)
   }
 }
 
@@ -691,8 +692,9 @@ class Column(protected[sql] val expr: Expression) extends Logging {
    *
    * @group expr_ops
    * @since 1.3.0
+   * @deprecated As of 1.5.0. Use isin. This will be removed in Spark 2.0.
    */
-  @deprecated("use isin", "1.5.0")
+  @deprecated("use isin. This will be removed in Spark 2.0.", "1.5.0")
   @scala.annotation.varargs
   def in(list: Any*): Column = isin(list : _*)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 5586fc994b98..5eca1db9525e 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -1713,9 +1713,9 @@ class DataFrame private[sql](
   ////////////////////////////////////////////////////////////////////////////
 
   /**
-   * @deprecated As of 1.3.0, replaced by `toDF()`.
+   * @deprecated As of 1.3.0, replaced by `toDF()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use toDF", "1.3.0")
+  @deprecated("Use toDF. This will be removed in Spark 2.0.", "1.3.0")
   def toSchemaRDD: DataFrame = this
 
   /**
@@ -1725,9 +1725,9 @@ class DataFrame private[sql](
    * given name; if you pass `false`, it will throw if the table already
    * exists.
    * @group output
-   * @deprecated As of 1.340, replaced by `write().jdbc()`.
+   * @deprecated As of 1.340, replaced by `write().jdbc()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.jdbc()", "1.4.0")
+  @deprecated("Use write.jdbc(). This will be removed in Spark 2.0.", "1.4.0")
   def createJDBCTable(url: String, table: String, allowExisting: Boolean): Unit = {
     val w = if (allowExisting) write.mode(SaveMode.Overwrite) else write
     w.jdbc(url, table, new Properties)
@@ -1744,9 +1744,9 @@ class DataFrame private[sql](
    * the RDD in order via the simple statement
    * `INSERT INTO table VALUES (?, ?, ..., ?)` should not fail.
    * @group output
-   * @deprecated As of 1.4.0, replaced by `write().jdbc()`.
+   * @deprecated As of 1.4.0, replaced by `write().jdbc()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.jdbc()", "1.4.0")
+  @deprecated("Use write.jdbc(). This will be removed in Spark 2.0.", "1.4.0")
   def insertIntoJDBC(url: String, table: String, overwrite: Boolean): Unit = {
     val w = if (overwrite) write.mode(SaveMode.Overwrite) else write.mode(SaveMode.Append)
     w.jdbc(url, table, new Properties)
@@ -1757,9 +1757,9 @@ class DataFrame private[sql](
    * Files that are written out using this method can be read back in as a [[DataFrame]]
    * using the `parquetFile` function in [[SQLContext]].
    * @group output
-   * @deprecated As of 1.4.0, replaced by `write().parquet()`.
+   * @deprecated As of 1.4.0, replaced by `write().parquet()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.parquet(path)", "1.4.0")
+  @deprecated("Use write.parquet(path). This will be removed in Spark 2.0.", "1.4.0")
   def saveAsParquetFile(path: String): Unit = {
     write.format("parquet").mode(SaveMode.ErrorIfExists).save(path)
   }
@@ -1782,8 +1782,9 @@ class DataFrame private[sql](
    *
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.saveAsTable(tableName). This will be removed in Spark 2.0.", "1.4.0")
   def saveAsTable(tableName: String): Unit = {
     write.mode(SaveMode.ErrorIfExists).saveAsTable(tableName)
   }
@@ -1805,8 +1806,10 @@ class DataFrame private[sql](
    *
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().mode(mode).saveAsTable(tableName)`.
+   *              This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.mode(mode).saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.mode(mode).saveAsTable(tableName). This will be removed in Spark 2.0.",
+    "1.4.0")
   def saveAsTable(tableName: String, mode: SaveMode): Unit = {
     write.mode(mode).saveAsTable(tableName)
   }
@@ -1829,8 +1832,10 @@ class DataFrame private[sql](
    *
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().format(source).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.format(source).saveAsTable(tableName). This will be removed in Spark 2.0.",
+    "1.4.0")
   def saveAsTable(tableName: String, source: String): Unit = {
     write.format(source).saveAsTable(tableName)
   }
@@ -1853,8 +1858,10 @@ class DataFrame private[sql](
    *
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().mode(mode).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).saveAsTable(tableName). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def saveAsTable(tableName: String, source: String, mode: SaveMode): Unit = {
     write.format(source).mode(mode).saveAsTable(tableName)
   }
@@ -1877,9 +1884,10 @@ class DataFrame private[sql](
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().format(source).mode(mode).options(options).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).options(options).saveAsTable(tableName)",
-    "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).options(options).saveAsTable(tableName). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def saveAsTable(
       tableName: String,
       source: String,
@@ -1907,9 +1915,10 @@ class DataFrame private[sql](
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().format(source).mode(mode).options(options).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).options(options).saveAsTable(tableName)",
-    "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).options(options).saveAsTable(tableName). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def saveAsTable(
       tableName: String,
       source: String,
@@ -1923,9 +1932,9 @@ class DataFrame private[sql](
    * using the default data source configured by spark.sql.sources.default and
    * [[SaveMode.ErrorIfExists]] as the save mode.
    * @group output
-   * @deprecated As of 1.4.0, replaced by `write().save(path)`.
+   * @deprecated As of 1.4.0, replaced by `write().save(path)`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.save(path)", "1.4.0")
+  @deprecated("Use write.save(path). This will be removed in Spark 2.0.", "1.4.0")
   def save(path: String): Unit = {
     write.save(path)
   }
@@ -1935,8 +1944,9 @@ class DataFrame private[sql](
    * using the default data source configured by spark.sql.sources.default.
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().mode(mode).save(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.mode(mode).save(path)", "1.4.0")
+  @deprecated("Use write.mode(mode).save(path). This will be removed in Spark 2.0.", "1.4.0")
   def save(path: String, mode: SaveMode): Unit = {
     write.mode(mode).save(path)
   }
@@ -1946,8 +1956,9 @@ class DataFrame private[sql](
    * using [[SaveMode.ErrorIfExists]] as the save mode.
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().format(source).save(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).save(path)", "1.4.0")
+  @deprecated("Use write.format(source).save(path). This will be removed in Spark 2.0.", "1.4.0")
   def save(path: String, source: String): Unit = {
     write.format(source).save(path)
   }
@@ -1957,8 +1968,10 @@ class DataFrame private[sql](
    * [[SaveMode]] specified by mode.
    * @group output
    * @deprecated As of 1.4.0, replaced by `write().format(source).mode(mode).save(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).save(path)", "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).save(path). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def save(path: String, source: String, mode: SaveMode): Unit = {
     write.format(source).mode(mode).save(path)
   }
@@ -1969,8 +1982,10 @@ class DataFrame private[sql](
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().format(source).mode(mode).options(options).save(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).options(options).save()", "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).options(options).save(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def save(
       source: String,
       mode: SaveMode,
@@ -1985,8 +2000,10 @@ class DataFrame private[sql](
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().format(source).mode(mode).options(options).save(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.format(source).mode(mode).options(options).save()", "1.4.0")
+  @deprecated("Use write.format(source).mode(mode).options(options).save(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def save(
       source: String,
       mode: SaveMode,
@@ -1994,14 +2011,15 @@ class DataFrame private[sql](
     write.format(source).mode(mode).options(options).save()
   }
 
-
   /**
    * Adds the rows from this RDD to the specified table, optionally overwriting the existing data.
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().mode(SaveMode.Append|SaveMode.Overwrite).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.mode(SaveMode.Append|SaveMode.Overwrite).saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.mode(SaveMode.Append|SaveMode.Overwrite).saveAsTable(tableName). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def insertInto(tableName: String, overwrite: Boolean): Unit = {
     write.mode(if (overwrite) SaveMode.Overwrite else SaveMode.Append).insertInto(tableName)
   }
@@ -2012,8 +2030,10 @@ class DataFrame private[sql](
    * @group output
    * @deprecated As of 1.4.0, replaced by
    *            `write().mode(SaveMode.Append).saveAsTable(tableName)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use write.mode(SaveMode.Append).saveAsTable(tableName)", "1.4.0")
+  @deprecated("Use write.mode(SaveMode.Append).saveAsTable(tableName). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def insertInto(tableName: String): Unit = {
     write.mode(SaveMode.Append).insertInto(tableName)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 17e2611790d5..dd84b8bc11e2 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -32,6 +32,7 @@ import org.apache.spark.sql.execution.{Queryable, QueryExecution}
 import org.apache.spark.sql.types.StructType
 
 /**
+ * :: Experimental ::
  * A [[Dataset]] is a strongly typed collection of objects that can be transformed in parallel
  * using functional or relational operations.
  *
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
index 39471d2fb79a..46bf544fd885 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala
@@ -942,33 +942,33 @@ class SQLContext private[sql](
   ////////////////////////////////////////////////////////////////////////////
 
   /**
-   * @deprecated As of 1.3.0, replaced by `createDataFrame()`.
+   * @deprecated As of 1.3.0, replaced by `createDataFrame()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use createDataFrame", "1.3.0")
+  @deprecated("Use createDataFrame. This will be removed in Spark 2.0.", "1.3.0")
   def applySchema(rowRDD: RDD[Row], schema: StructType): DataFrame = {
     createDataFrame(rowRDD, schema)
   }
 
   /**
-   * @deprecated As of 1.3.0, replaced by `createDataFrame()`.
+   * @deprecated As of 1.3.0, replaced by `createDataFrame()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use createDataFrame", "1.3.0")
+  @deprecated("Use createDataFrame. This will be removed in Spark 2.0.", "1.3.0")
   def applySchema(rowRDD: JavaRDD[Row], schema: StructType): DataFrame = {
     createDataFrame(rowRDD, schema)
   }
 
   /**
-   * @deprecated As of 1.3.0, replaced by `createDataFrame()`.
+   * @deprecated As of 1.3.0, replaced by `createDataFrame()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use createDataFrame", "1.3.0")
+  @deprecated("Use createDataFrame. This will be removed in Spark 2.0.", "1.3.0")
   def applySchema(rdd: RDD[_], beanClass: Class[_]): DataFrame = {
     createDataFrame(rdd, beanClass)
   }
 
   /**
-   * @deprecated As of 1.3.0, replaced by `createDataFrame()`.
+   * @deprecated As of 1.3.0, replaced by `createDataFrame()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use createDataFrame", "1.3.0")
+  @deprecated("Use createDataFrame. This will be removed in Spark 2.0.", "1.3.0")
   def applySchema(rdd: JavaRDD[_], beanClass: Class[_]): DataFrame = {
     createDataFrame(rdd, beanClass)
   }
@@ -978,9 +978,9 @@ class SQLContext private[sql](
    * [[DataFrame]] if no paths are passed in.
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().parquet()`.
+   * @deprecated As of 1.4.0, replaced by `read().parquet()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.parquet()", "1.4.0")
+  @deprecated("Use read.parquet(). This will be removed in Spark 2.0.", "1.4.0")
   @scala.annotation.varargs
   def parquetFile(paths: String*): DataFrame = {
     if (paths.isEmpty) {
@@ -995,9 +995,9 @@ class SQLContext private[sql](
    * It goes through the entire dataset once to determine the schema.
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonFile(path: String): DataFrame = {
     read.json(path)
   }
@@ -1007,18 +1007,18 @@ class SQLContext private[sql](
    * returning the result as a [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonFile(path: String, schema: StructType): DataFrame = {
     read.schema(schema).json(path)
   }
 
   /**
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonFile(path: String, samplingRatio: Double): DataFrame = {
     read.option("samplingRatio", samplingRatio.toString).json(path)
   }
@@ -1029,9 +1029,9 @@ class SQLContext private[sql](
    * It goes through the entire dataset once to determine the schema.
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: RDD[String]): DataFrame = read.json(json)
 
   /**
@@ -1040,9 +1040,9 @@ class SQLContext private[sql](
    * It goes through the entire dataset once to determine the schema.
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: JavaRDD[String]): DataFrame = read.json(json)
 
   /**
@@ -1050,9 +1050,9 @@ class SQLContext private[sql](
    * returning the result as a [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: RDD[String], schema: StructType): DataFrame = {
     read.schema(schema).json(json)
   }
@@ -1062,9 +1062,9 @@ class SQLContext private[sql](
    * schema, returning the result as a [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: JavaRDD[String], schema: StructType): DataFrame = {
     read.schema(schema).json(json)
   }
@@ -1074,9 +1074,9 @@ class SQLContext private[sql](
    * schema, returning the result as a [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: RDD[String], samplingRatio: Double): DataFrame = {
     read.option("samplingRatio", samplingRatio.toString).json(json)
   }
@@ -1086,9 +1086,9 @@ class SQLContext private[sql](
    * schema, returning the result as a [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().json()`.
+   * @deprecated As of 1.4.0, replaced by `read().json()`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.json()", "1.4.0")
+  @deprecated("Use read.json(). This will be removed in Spark 2.0.", "1.4.0")
   def jsonRDD(json: JavaRDD[String], samplingRatio: Double): DataFrame = {
     read.option("samplingRatio", samplingRatio.toString).json(json)
   }
@@ -1098,9 +1098,9 @@ class SQLContext private[sql](
    * using the default data source configured by spark.sql.sources.default.
    *
    * @group genericdata
-   * @deprecated As of 1.4.0, replaced by `read().load(path)`.
+   * @deprecated As of 1.4.0, replaced by `read().load(path)`. This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.load(path)", "1.4.0")
+  @deprecated("Use read.load(path). This will be removed in Spark 2.0.", "1.4.0")
   def load(path: String): DataFrame = {
     read.load(path)
   }
@@ -1110,8 +1110,9 @@ class SQLContext private[sql](
    *
    * @group genericdata
    * @deprecated As of 1.4.0, replaced by `read().format(source).load(path)`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.format(source).load(path)", "1.4.0")
+  @deprecated("Use read.format(source).load(path). This will be removed in Spark 2.0.", "1.4.0")
   def load(path: String, source: String): DataFrame = {
     read.format(source).load(path)
   }
@@ -1122,8 +1123,10 @@ class SQLContext private[sql](
    *
    * @group genericdata
    * @deprecated As of 1.4.0, replaced by `read().format(source).options(options).load()`.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use read.format(source).options(options).load()", "1.4.0")
+  @deprecated("Use read.format(source).options(options).load(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def load(source: String, options: java.util.Map[String, String]): DataFrame = {
     read.options(options).format(source).load()
   }
@@ -1135,7 +1138,8 @@ class SQLContext private[sql](
    * @group genericdata
    * @deprecated As of 1.4.0, replaced by `read().format(source).options(options).load()`.
    */
-  @deprecated("Use read.format(source).options(options).load()", "1.4.0")
+  @deprecated("Use read.format(source).options(options).load(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def load(source: String, options: Map[String, String]): DataFrame = {
     read.options(options).format(source).load()
   }
@@ -1148,7 +1152,8 @@ class SQLContext private[sql](
    * @deprecated As of 1.4.0, replaced by
    *            `read().format(source).schema(schema).options(options).load()`.
    */
-  @deprecated("Use read.format(source).schema(schema).options(options).load()", "1.4.0")
+  @deprecated("Use read.format(source).schema(schema).options(options).load(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def load(source: String, schema: StructType, options: java.util.Map[String, String]): DataFrame =
   {
     read.format(source).schema(schema).options(options).load()
@@ -1162,7 +1167,8 @@ class SQLContext private[sql](
    * @deprecated As of 1.4.0, replaced by
    *            `read().format(source).schema(schema).options(options).load()`.
    */
-  @deprecated("Use read.format(source).schema(schema).options(options).load()", "1.4.0")
+  @deprecated("Use read.format(source).schema(schema).options(options).load(). " +
+    "This will be removed in Spark 2.0.", "1.4.0")
   def load(source: String, schema: StructType, options: Map[String, String]): DataFrame = {
     read.format(source).schema(schema).options(options).load()
   }
@@ -1172,9 +1178,9 @@ class SQLContext private[sql](
    * url named table.
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().jdbc()`.
+   * @deprecated As of 1.4.0, replaced by `read().jdbc()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use read.jdbc()", "1.4.0")
+  @deprecated("Use read.jdbc(). This will be removed in Spark 2.0.", "1.4.0")
   def jdbc(url: String, table: String): DataFrame = {
     read.jdbc(url, table, new Properties)
   }
@@ -1190,9 +1196,9 @@ class SQLContext private[sql](
    * @param numPartitions the number of partitions.  the range `minValue`-`maxValue` will be split
    *                      evenly into this many partitions
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().jdbc()`.
+   * @deprecated As of 1.4.0, replaced by `read().jdbc()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use read.jdbc()", "1.4.0")
+  @deprecated("Use read.jdbc(). This will be removed in Spark 2.0.", "1.4.0")
   def jdbc(
       url: String,
       table: String,
@@ -1210,9 +1216,9 @@ class SQLContext private[sql](
    * of the [[DataFrame]].
    *
    * @group specificdata
-   * @deprecated As of 1.4.0, replaced by `read().jdbc()`.
+   * @deprecated As of 1.4.0, replaced by `read().jdbc()`. This will be removed in Spark 2.0.
    */
-  @deprecated("use read.jdbc()", "1.4.0")
+  @deprecated("Use read.jdbc(). This will be removed in Spark 2.0.", "1.4.0")
   def jdbc(url: String, table: String, theParts: Array[String]): DataFrame = {
     read.jdbc(url, table, theParts, new Properties)
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
index 25ffdcde1771..6735d02954b8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/SQLImplicits.scala
@@ -30,19 +30,38 @@ import org.apache.spark.unsafe.types.UTF8String
 
 /**
  * A collection of implicit methods for converting common Scala objects into [[DataFrame]]s.
+ *
+ * @since 1.6.0
  */
 abstract class SQLImplicits {
+
   protected def _sqlContext: SQLContext
 
+  /** @since 1.6.0 */
   implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = ExpressionEncoder()
 
+  /** @since 1.6.0 */
   implicit def newIntEncoder: Encoder[Int] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newLongEncoder: Encoder[Long] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newDoubleEncoder: Encoder[Double] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newFloatEncoder: Encoder[Float] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newByteEncoder: Encoder[Byte] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newShortEncoder: Encoder[Short] = ExpressionEncoder()
+  /** @since 1.6.0 */
+
   implicit def newBooleanEncoder: Encoder[Boolean] = ExpressionEncoder()
+
+  /** @since 1.6.0 */
   implicit def newStringEncoder: Encoder[String] = ExpressionEncoder()
 
   /**
@@ -84,9 +103,9 @@ abstract class SQLImplicits {
     DataFrameHolder(_sqlContext.createDataFrame(data))
   }
 
-  // Do NOT add more implicit conversions. They are likely to break source compatibility by
-  // making existing implicit conversions ambiguous. In particular, RDD[Double] is dangerous
-  // because of [[DoubleRDDFunctions]].
+  // Do NOT add more implicit conversions for primitive types.
+  // They are likely to break source compatibility by making existing implicit conversions
+  // ambiguous. In particular, RDD[Double] is dangerous because of [[DoubleRDDFunctions]].
 
   /**
    * Creates a single column DataFrame from an RDD[Int].
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/SparkSQLParser.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSQLParser.scala
similarity index 89%
rename from sql/core/src/main/scala/org/apache/spark/sql/SparkSQLParser.scala
rename to sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSQLParser.scala
index ea8fce6ca9cf..b3e8d0d84937 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/SparkSQLParser.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSQLParser.scala
@@ -15,24 +15,23 @@
  * limitations under the License.
  */
 
-package org.apache.spark.sql
+package org.apache.spark.sql.execution
 
 import scala.util.parsing.combinator.RegexParsers
 
 import org.apache.spark.sql.catalyst.AbstractSparkSQLParser
 import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference}
-import org.apache.spark.sql.catalyst.plans.logical.{DescribeFunction, LogicalPlan, ShowFunctions}
-import org.apache.spark.sql.execution._
+import org.apache.spark.sql.catalyst.plans.logical
+import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.types.StringType
 
-
 /**
  * The top level Spark SQL parser. This parser recognizes syntaxes that are available for all SQL
  * dialects supported by Spark SQL, and delegates all the other syntaxes to the `fallback` parser.
  *
  * @param fallback A function that parses an input string to a logical plan
  */
-private[sql] class SparkSQLParser(fallback: String => LogicalPlan) extends AbstractSparkSQLParser {
+class SparkSQLParser(fallback: String => LogicalPlan) extends AbstractSparkSQLParser {
 
   // A parser for the key-value part of the "SET [key = [value ]]" syntax
   private object SetCommandParser extends RegexParsers {
@@ -100,14 +99,14 @@ private[sql] class SparkSQLParser(fallback: String => LogicalPlan) extends Abstr
         case _ ~ dbName => ShowTablesCommand(dbName)
       }
     | SHOW ~ FUNCTIONS ~> ((ident <~ ".").? ~ (ident | stringLit)).? ^^ {
-        case Some(f) => ShowFunctions(f._1, Some(f._2))
-        case None => ShowFunctions(None, None)
+        case Some(f) => logical.ShowFunctions(f._1, Some(f._2))
+        case None => logical.ShowFunctions(None, None)
       }
     )
 
   private lazy val desc: Parser[LogicalPlan] =
     DESCRIBE ~ FUNCTION ~> EXTENDED.? ~ (ident | stringLit) ^^ {
-      case isExtended ~ functionName => DescribeFunction(functionName, isExtended.isDefined)
+      case isExtended ~ functionName => logical.DescribeFunction(functionName, isExtended.isDefined)
     }
 
   private lazy val others: Parser[LogicalPlan] =
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 6137ce3a70fd..77dd5bc72508 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -17,8 +17,6 @@
 
 package org.apache.spark.sql
 
-
-
 import scala.language.implicitConversions
 import scala.reflect.runtime.universe.{TypeTag, typeTag}
 import scala.util.Try
@@ -39,11 +37,11 @@ import org.apache.spark.util.Utils
  * "bridge" methods due to the use of covariant return types.
  *
  * {{{
- * In LegacyFunctions:
- * public abstract org.apache.spark.sql.Column avg(java.lang.String);
+ *   // In LegacyFunctions:
+ *   public abstract org.apache.spark.sql.Column avg(java.lang.String);
  *
- * In functions:
- * public static org.apache.spark.sql.TypedColumn<java.lang.Object, java.lang.Object> avg(...);
+ *   // In functions:
+ *   public static org.apache.spark.sql.TypedColumn<java.lang.Object, java.lang.Object> avg(...);
  * }}}
  *
  * This allows us to use the same functions both in typed [[Dataset]] operations and untyped
@@ -2528,8 +2526,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function0[_], returnType: DataType): Column = withExpr {
     ScalaUDF(f, returnType, Seq())
   }
@@ -2541,8 +2540,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function1[_, _], returnType: DataType, arg1: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr))
   }
@@ -2554,8 +2554,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function2[_, _, _], returnType: DataType, arg1: Column, arg2: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr))
   }
@@ -2567,8 +2568,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function3[_, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr))
   }
@@ -2580,8 +2582,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function4[_, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr))
   }
@@ -2593,8 +2596,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function5[_, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr))
   }
@@ -2606,8 +2610,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function6[_, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr))
   }
@@ -2619,8 +2624,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function7[_, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr))
   }
@@ -2632,8 +2638,9 @@ object functions extends LegacyFunctions {
     * @group udf_funcs
     * @since 1.3.0
     * @deprecated As of 1.5.0, since it's redundant with udf()
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function8[_, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr))
   }
@@ -2644,9 +2651,10 @@ object functions extends LegacyFunctions {
     *
     * @group udf_funcs
     * @since 1.3.0
-    * @deprecated As of 1.5.0, since it's redundant with udf()
+    * @deprecated As of 1.5.0, since it's redundant with udf().
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function9[_, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr, arg9.expr))
   }
@@ -2657,9 +2665,10 @@ object functions extends LegacyFunctions {
     *
     * @group udf_funcs
     * @since 1.3.0
-    * @deprecated As of 1.5.0, since it's redundant with udf()
+    * @deprecated As of 1.5.0, since it's redundant with udf().
+   *              This will be removed in Spark 2.0.
     */
-  @deprecated("Use udf", "1.5.0")
+  @deprecated("Use udf. This will be removed in Spark 2.0.", "1.5.0")
   def callUDF(f: Function10[_, _, _, _, _, _, _, _, _, _, _], returnType: DataType, arg1: Column, arg2: Column, arg3: Column, arg4: Column, arg5: Column, arg6: Column, arg7: Column, arg8: Column, arg9: Column, arg10: Column): Column = withExpr {
     ScalaUDF(f, returnType, Seq(arg1.expr, arg2.expr, arg3.expr, arg4.expr, arg5.expr, arg6.expr, arg7.expr, arg8.expr, arg9.expr, arg10.expr))
   }
@@ -2700,9 +2709,10 @@ object functions extends LegacyFunctions {
    *
    * @group udf_funcs
    * @since 1.4.0
-   * @deprecated As of 1.5.0, since it was not coherent to have two functions callUdf and callUDF
+   * @deprecated As of 1.5.0, since it was not coherent to have two functions callUdf and callUDF.
+   *             This will be removed in Spark 2.0.
    */
-  @deprecated("Use callUDF", "1.5.0")
+  @deprecated("Use callUDF. This will be removed in Spark 2.0.", "1.5.0")
   def callUdf(udfName: String, cols: Column*): Column = withExpr {
     // Note: we avoid using closures here because on file systems that are case-insensitive, the
     // compiled class file for the closure here will conflict with the one in callUDF (upper case).
diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
index 81af684ba0bf..b554d135e4b5 100644
--- a/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
+++ b/sql/hive/src/test/scala/org/apache/spark/sql/sources/SimpleTextHadoopFsRelationSuite.scala
@@ -80,7 +80,11 @@ class SimpleTextHadoopFsRelationSuite extends HadoopFsRelationTest with Predicat
 
   private var partitionedDF: DataFrame = _
 
-  private val partitionedDataSchema: StructType = StructType('a.int :: 'b.int :: 'c.string :: Nil)
+  private val partitionedDataSchema: StructType =
+    new StructType()
+      .add("a", IntegerType)
+      .add("b", IntegerType)
+      .add("c", StringType)
 
   protected override def beforeAll(): Unit = {
     this.tempPath = Utils.createTempDir()

From a5d988763319f63a8e2b58673dd4f9098f17c835 Mon Sep 17 00:00:00 2001
From: Burak Yavuz <brkyvz@gmail.com>
Date: Tue, 24 Nov 2015 20:58:47 -0800
Subject: [PATCH 886/896] [STREAMING][FLAKY-TEST] Catch execution context race
 condition in `FileBasedWriteAheadLog.close()`

There is a race condition in `FileBasedWriteAheadLog.close()`, where if delete's of old log files are in progress, the write ahead log may close, and result in a `RejectedExecutionException`. This is okay, and should be handled gracefully.

Example test failures:
https://amplab.cs.berkeley.edu/jenkins/job/Spark-1.6-SBT/AMPLAB_JENKINS_BUILD_PROFILE=hadoop1.0,label=spark-test/95/testReport/junit/org.apache.spark.streaming.util/BatchedWriteAheadLogWithCloseFileAfterWriteSuite/BatchedWriteAheadLog___clean_old_logs/

The reason the test fails is in `afterEach`, `writeAheadLog.close` is called, and there may still be async deletes in flight.

tdas zsxwing

Author: Burak Yavuz <brkyvz@gmail.com>

Closes #9953 from brkyvz/flaky-ss.
---
 .../streaming/util/FileBasedWriteAheadLog.scala  | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
index 72705f1a9c01..f5165f7c3912 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/FileBasedWriteAheadLog.scala
@@ -17,7 +17,7 @@
 package org.apache.spark.streaming.util
 
 import java.nio.ByteBuffer
-import java.util.concurrent.ThreadPoolExecutor
+import java.util.concurrent.{RejectedExecutionException, ThreadPoolExecutor}
 import java.util.{Iterator => JIterator}
 
 import scala.collection.JavaConverters._
@@ -176,10 +176,16 @@ private[streaming] class FileBasedWriteAheadLog(
     }
     oldLogFiles.foreach { logInfo =>
       if (!executionContext.isShutdown) {
-        val f = Future { deleteFile(logInfo) }(executionContext)
-        if (waitForCompletion) {
-          import scala.concurrent.duration._
-          Await.ready(f, 1 second)
+        try {
+          val f = Future { deleteFile(logInfo) }(executionContext)
+          if (waitForCompletion) {
+            import scala.concurrent.duration._
+            Await.ready(f, 1 second)
+          }
+        } catch {
+          case e: RejectedExecutionException =>
+            logWarning("Execution context shutdown before deleting old WriteAheadLogs. " +
+              "This would not affect recovery correctness.", e)
         }
       }
     }

From 151d7c2baf18403e6e59e97c80c8bcded6148038 Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Tue, 24 Nov 2015 21:30:53 -0800
Subject: [PATCH 887/896] [SPARK-10621][SQL] Consistent naming for functions in
 SQL, Python, Scala

Author: Reynold Xin <rxin@databricks.com>

Closes #9948 from rxin/SPARK-10621.
---
 python/pyspark/sql/functions.py               | 111 +++++++++++++---
 .../org/apache/spark/sql/functions.scala      | 124 ++++++++++++++----
 2 files changed, 196 insertions(+), 39 deletions(-)

diff --git a/python/pyspark/sql/functions.py b/python/pyspark/sql/functions.py
index a1ca723bbd7a..e3786e0fa5fb 100644
--- a/python/pyspark/sql/functions.py
+++ b/python/pyspark/sql/functions.py
@@ -150,18 +150,18 @@ def _():
 
 _window_functions = {
     'rowNumber':
-        """returns a sequential number starting at 1 within a window partition.
-
-        This is equivalent to the ROW_NUMBER function in SQL.""",
+        """.. note:: Deprecated in 1.6, use row_number instead.""",
+    'row_number':
+        """returns a sequential number starting at 1 within a window partition.""",
     'denseRank':
+        """.. note:: Deprecated in 1.6, use dense_rank instead.""",
+    'dense_rank':
         """returns the rank of rows within a window partition, without any gaps.
 
         The difference between rank and denseRank is that denseRank leaves no gaps in ranking
         sequence when there are ties. That is, if you were ranking a competition using denseRank
         and had three people tie for second place, you would say that all three were in second
-        place and that the next person came in third.
-
-        This is equivalent to the DENSE_RANK function in SQL.""",
+        place and that the next person came in third.""",
     'rank':
         """returns the rank of rows within a window partition.
 
@@ -172,14 +172,14 @@ def _():
 
         This is equivalent to the RANK function in SQL.""",
     'cumeDist':
+        """.. note:: Deprecated in 1.6, use cume_dist instead.""",
+    'cume_dist':
         """returns the cumulative distribution of values within a window partition,
-        i.e. the fraction of rows that are below the current row.
-
-        This is equivalent to the CUME_DIST function in SQL.""",
+        i.e. the fraction of rows that are below the current row.""",
     'percentRank':
-        """returns the relative rank (i.e. percentile) of rows within a window partition.
-
-        This is equivalent to the PERCENT_RANK function in SQL.""",
+        """.. note:: Deprecated in 1.6, use percent_rank instead.""",
+    'percent_rank':
+        """returns the relative rank (i.e. percentile) of rows within a window partition.""",
 }
 
 for _name, _doc in _functions.items():
@@ -189,7 +189,7 @@ def _():
 for _name, _doc in _binary_mathfunctions.items():
     globals()[_name] = since(1.4)(_create_binary_mathfunction(_name, _doc))
 for _name, _doc in _window_functions.items():
-    globals()[_name] = since(1.4)(_create_window_function(_name, _doc))
+    globals()[_name] = since(1.6)(_create_window_function(_name, _doc))
 for _name, _doc in _functions_1_6.items():
     globals()[_name] = since(1.6)(_create_function(_name, _doc))
 del _name, _doc
@@ -288,6 +288,38 @@ def countDistinct(col, *cols):
 
 @since(1.4)
 def monotonicallyIncreasingId():
+    """
+    .. note:: Deprecated in 1.6, use monotonically_increasing_id instead.
+    """
+    return monotonically_increasing_id()
+
+
+@since(1.6)
+def input_file_name():
+    """Creates a string column for the file name of the current Spark task.
+    """
+    sc = SparkContext._active_spark_context
+    return Column(sc._jvm.functions.input_file_name())
+
+
+@since(1.6)
+def isnan(col):
+    """An expression that returns true iff the column is NaN.
+    """
+    sc = SparkContext._active_spark_context
+    return Column(sc._jvm.functions.isnan(_to_java_column(col)))
+
+
+@since(1.6)
+def isnull(col):
+    """An expression that returns true iff the column is null.
+    """
+    sc = SparkContext._active_spark_context
+    return Column(sc._jvm.functions.isnull(_to_java_column(col)))
+
+
+@since(1.6)
+def monotonically_increasing_id():
     """A column that generates monotonically increasing 64-bit integers.
 
     The generated ID is guaranteed to be monotonically increasing and unique, but not consecutive.
@@ -300,11 +332,21 @@ def monotonicallyIncreasingId():
     0, 1, 2, 8589934592 (1L << 33), 8589934593, 8589934594.
 
     >>> df0 = sc.parallelize(range(2), 2).mapPartitions(lambda x: [(1,), (2,), (3,)]).toDF(['col1'])
-    >>> df0.select(monotonicallyIncreasingId().alias('id')).collect()
+    >>> df0.select(monotonically_increasing_id().alias('id')).collect()
     [Row(id=0), Row(id=1), Row(id=2), Row(id=8589934592), Row(id=8589934593), Row(id=8589934594)]
     """
     sc = SparkContext._active_spark_context
-    return Column(sc._jvm.functions.monotonicallyIncreasingId())
+    return Column(sc._jvm.functions.monotonically_increasing_id())
+
+
+@since(1.6)
+def nanvl(col1, col2):
+    """Returns col1 if it is not NaN, or col2 if col1 is NaN.
+
+    Both inputs should be floating point columns (DoubleType or FloatType).
+    """
+    sc = SparkContext._active_spark_context
+    return Column(sc._jvm.functions.nanvl(_to_java_column(col1), _to_java_column(col2)))
 
 
 @since(1.4)
@@ -382,15 +424,23 @@ def shiftRightUnsigned(col, numBits):
 
 @since(1.4)
 def sparkPartitionId():
+    """
+    .. note:: Deprecated in 1.6, use spark_partition_id instead.
+    """
+    return spark_partition_id()
+
+
+@since(1.6)
+def spark_partition_id():
     """A column for partition ID of the Spark task.
 
     Note that this is indeterministic because it depends on data partitioning and task scheduling.
 
-    >>> df.repartition(1).select(sparkPartitionId().alias("pid")).collect()
+    >>> df.repartition(1).select(spark_partition_id().alias("pid")).collect()
     [Row(pid=0), Row(pid=0)]
     """
     sc = SparkContext._active_spark_context
-    return Column(sc._jvm.functions.sparkPartitionId())
+    return Column(sc._jvm.functions.spark_partition_id())
 
 
 @since(1.5)
@@ -1410,6 +1460,33 @@ def explode(col):
     return Column(jc)
 
 
+@since(1.6)
+def get_json_object(col, path):
+    """
+    Extracts json object from a json string based on json path specified, and returns json string
+    of the extracted json object. It will return null if the input json string is invalid.
+
+    :param col: string column in json format
+    :param path: path to the json object to extract
+    """
+    sc = SparkContext._active_spark_context
+    jc = sc._jvm.functions.get_json_object(_to_java_column(col), path)
+    return Column(jc)
+
+
+@since(1.6)
+def json_tuple(col, fields):
+    """Creates a new row for a json column according to the given field names.
+
+    :param col: string column in json format
+    :param fields: list of fields to extract
+
+    """
+    sc = SparkContext._active_spark_context
+    jc = sc._jvm.functions.json_tuple(_to_java_column(col), fields)
+    return Column(jc)
+
+
 @since(1.5)
 def size(col):
     """
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
index 77dd5bc72508..276c5dfc8b06 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
@@ -472,6 +472,13 @@ object functions extends LegacyFunctions {
   // Window functions
   //////////////////////////////////////////////////////////////////////////////////////////////
 
+  /**
+   * @group window_funcs
+   * @deprecated As of 1.6.0, replaced by `cume_dist`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use cume_dist. This will be removed in Spark 2.0.", "1.6.0")
+  def cumeDist(): Column = cume_dist()
+
   /**
    * Window function: returns the cumulative distribution of values within a window partition,
    * i.e. the fraction of rows that are below the current row.
@@ -481,13 +488,17 @@ object functions extends LegacyFunctions {
    *   cumeDist(x) = number of values before (and including) x / N
    * }}}
    *
-   *
-   * This is equivalent to the CUME_DIST function in SQL.
-   *
    * @group window_funcs
-   * @since 1.4.0
+   * @since 1.6.0
    */
-  def cumeDist(): Column = withExpr { UnresolvedWindowFunction("cume_dist", Nil) }
+  def cume_dist(): Column = withExpr { UnresolvedWindowFunction("cume_dist", Nil) }
+
+  /**
+   * @group window_funcs
+   * @deprecated As of 1.6.0, replaced by `dense_rank`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use dense_rank. This will be removed in Spark 2.0.", "1.6.0")
+  def denseRank(): Column = dense_rank()
 
   /**
    * Window function: returns the rank of rows within a window partition, without any gaps.
@@ -497,12 +508,10 @@ object functions extends LegacyFunctions {
    * and had three people tie for second place, you would say that all three were in second
    * place and that the next person came in third.
    *
-   * This is equivalent to the DENSE_RANK function in SQL.
-   *
    * @group window_funcs
-   * @since 1.4.0
+   * @since 1.6.0
    */
-  def denseRank(): Column = withExpr { UnresolvedWindowFunction("dense_rank", Nil) }
+  def dense_rank(): Column = withExpr { UnresolvedWindowFunction("dense_rank", Nil) }
 
   /**
    * Window function: returns the value that is `offset` rows before the current row, and
@@ -620,6 +629,13 @@ object functions extends LegacyFunctions {
    */
   def ntile(n: Int): Column = withExpr { UnresolvedWindowFunction("ntile", lit(n).expr :: Nil) }
 
+  /**
+   * @group window_funcs
+   * @deprecated As of 1.6.0, replaced by `percent_rank`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use percent_rank. This will be removed in Spark 2.0.", "1.6.0")
+  def percentRank(): Column = percent_rank()
+
   /**
    * Window function: returns the relative rank (i.e. percentile) of rows within a window partition.
    *
@@ -631,9 +647,9 @@ object functions extends LegacyFunctions {
    * This is equivalent to the PERCENT_RANK function in SQL.
    *
    * @group window_funcs
-   * @since 1.4.0
+   * @since 1.6.0
    */
-  def percentRank(): Column = withExpr { UnresolvedWindowFunction("percent_rank", Nil) }
+  def percent_rank(): Column = withExpr { UnresolvedWindowFunction("percent_rank", Nil) }
 
   /**
    * Window function: returns the rank of rows within a window partition.
@@ -650,15 +666,20 @@ object functions extends LegacyFunctions {
    */
   def rank(): Column = withExpr { UnresolvedWindowFunction("rank", Nil) }
 
+  /**
+   * @group window_funcs
+   * @deprecated As of 1.6.0, replaced by `row_number`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use row_number. This will be removed in Spark 2.0.", "1.6.0")
+  def rowNumber(): Column = row_number()
+
   /**
    * Window function: returns a sequential number starting at 1 within a window partition.
    *
-   * This is equivalent to the ROW_NUMBER function in SQL.
-   *
    * @group window_funcs
-   * @since 1.4.0
+   * @since 1.6.0
    */
-  def rowNumber(): Column = withExpr { UnresolvedWindowFunction("row_number", Nil) }
+  def row_number(): Column = withExpr { UnresolvedWindowFunction("row_number", Nil) }
 
   //////////////////////////////////////////////////////////////////////////////////////////////
   // Non-aggregate functions
@@ -720,20 +741,43 @@ object functions extends LegacyFunctions {
   @scala.annotation.varargs
   def coalesce(e: Column*): Column = withExpr { Coalesce(e.map(_.expr)) }
 
+  /**
+   * @group normal_funcs
+   * @deprecated As of 1.6.0, replaced by `input_file_name`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use input_file_name. This will be removed in Spark 2.0.", "1.6.0")
+  def inputFileName(): Column = input_file_name()
+
   /**
    * Creates a string column for the file name of the current Spark task.
    *
    * @group normal_funcs
+   * @since 1.6.0
    */
-  def inputFileName(): Column = withExpr { InputFileName() }
+  def input_file_name(): Column = withExpr { InputFileName() }
+
+  /**
+   * @group normal_funcs
+   * @deprecated As of 1.6.0, replaced by `isnan`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use isnan. This will be removed in Spark 2.0.", "1.6.0")
+  def isNaN(e: Column): Column = isnan(e)
 
   /**
    * Return true iff the column is NaN.
    *
    * @group normal_funcs
-   * @since 1.5.0
+   * @since 1.6.0
+   */
+  def isnan(e: Column): Column = withExpr { IsNaN(e.expr) }
+
+  /**
+   * Return true iff the column is null.
+   *
+   * @group normal_funcs
+   * @since 1.6.0
    */
-  def isNaN(e: Column): Column = withExpr { IsNaN(e.expr) }
+  def isnull(e: Column): Column = withExpr { IsNull(e.expr) }
 
   /**
    * A column expression that generates monotonically increasing 64-bit integers.
@@ -750,7 +794,24 @@ object functions extends LegacyFunctions {
    * @group normal_funcs
    * @since 1.4.0
    */
-  def monotonicallyIncreasingId(): Column = withExpr { MonotonicallyIncreasingID() }
+  def monotonicallyIncreasingId(): Column = monotonically_increasing_id()
+
+  /**
+   * A column expression that generates monotonically increasing 64-bit integers.
+   *
+   * The generated ID is guaranteed to be monotonically increasing and unique, but not consecutive.
+   * The current implementation puts the partition ID in the upper 31 bits, and the record number
+   * within each partition in the lower 33 bits. The assumption is that the data frame has
+   * less than 1 billion partitions, and each partition has less than 8 billion records.
+   *
+   * As an example, consider a [[DataFrame]] with two partitions, each with 3 records.
+   * This expression would return the following IDs:
+   * 0, 1, 2, 8589934592 (1L << 33), 8589934593, 8589934594.
+   *
+   * @group normal_funcs
+   * @since 1.6.0
+   */
+  def monotonically_increasing_id(): Column = withExpr { MonotonicallyIncreasingID() }
 
   /**
    * Returns col1 if it is not NaN, or col2 if col1 is NaN.
@@ -825,15 +886,23 @@ object functions extends LegacyFunctions {
    */
   def randn(): Column = randn(Utils.random.nextLong)
 
+  /**
+   * @group normal_funcs
+   * @since 1.4.0
+   * @deprecated As of 1.6.0, replaced by `spark_partition_id`. This will be removed in Spark 2.0.
+   */
+  @deprecated("Use cume_dist. This will be removed in Spark 2.0.", "1.6.0")
+  def sparkPartitionId(): Column = spark_partition_id()
+
   /**
    * Partition ID of the Spark task.
    *
    * Note that this is indeterministic because it depends on data partitioning and task scheduling.
    *
    * @group normal_funcs
-   * @since 1.4.0
+   * @since 1.6.0
    */
-  def sparkPartitionId(): Column = withExpr { SparkPartitionID() }
+  def spark_partition_id(): Column = withExpr { SparkPartitionID() }
 
   /**
    * Computes the square root of the specified float value.
@@ -2305,6 +2374,17 @@ object functions extends LegacyFunctions {
    */
   def explode(e: Column): Column = withExpr { Explode(e.expr) }
 
+  /**
+   * Extracts json object from a json string based on json path specified, and returns json string
+   * of the extracted json object. It will return null if the input json string is invalid.
+   *
+   * @group collection_funcs
+   * @since 1.6.0
+   */
+  def get_json_object(e: Column, path: String): Column = withExpr {
+    GetJsonObject(e.expr, lit(path).expr)
+  }
+
   /**
    * Creates a new row for a json column according to the given field names.
    *
@@ -2313,7 +2393,7 @@ object functions extends LegacyFunctions {
    */
   @scala.annotation.varargs
   def json_tuple(json: Column, fields: String*): Column = withExpr {
-    require(fields.length > 0, "at least 1 field name should be given.")
+    require(fields.nonEmpty, "at least 1 field name should be given.")
     JsonTuple(json.expr +: fields.map(Literal.apply))
   }
 

From 2169886883d33b33acf378ac42a626576b342df1 Mon Sep 17 00:00:00 2001
From: Tathagata Das <tathagata.das1565@gmail.com>
Date: Tue, 24 Nov 2015 23:13:01 -0800
Subject: [PATCH 888/896] [SPARK-11979][STREAMING] Empty TrackStateRDD cannot
 be checkpointed and recovered from checkpoint file

This solves the following exception caused when empty state RDD is checkpointed and recovered. The root cause is that an empty OpenHashMapBasedStateMap cannot be deserialized as the initialCapacity is set to zero.
```
Job aborted due to stage failure: Task 0 in stage 6.0 failed 1 times, most recent failure: Lost task 0.0 in stage 6.0 (TID 20, localhost): java.lang.IllegalArgumentException: requirement failed: Invalid initial capacity
	at scala.Predef$.require(Predef.scala:233)
	at org.apache.spark.streaming.util.OpenHashMapBasedStateMap.<init>(StateMap.scala:96)
	at org.apache.spark.streaming.util.OpenHashMapBasedStateMap.<init>(StateMap.scala:86)
	at org.apache.spark.streaming.util.OpenHashMapBasedStateMap.readObject(StateMap.scala:291)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
	at org.apache.spark.serializer.JavaDeserializationStream.readObject(JavaSerializer.scala:76)
	at org.apache.spark.serializer.DeserializationStream$$anon$1.getNext(Serializer.scala:181)
	at org.apache.spark.util.NextIterator.hasNext(NextIterator.scala:73)
	at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala:371)
	at scala.collection.Iterator$class.foreach(Iterator.scala:727)
	at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
	at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)
	at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:47)
	at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:273)
	at scala.collection.AbstractIterator.to(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:265)
	at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1157)
	at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:252)
	at scala.collection.AbstractIterator.toArray(Iterator.scala:1157)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:921)
	at org.apache.spark.rdd.RDD$$anonfun$collect$1$$anonfun$12.apply(RDD.scala:921)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1858)
	at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1858)
	at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
	at org.apache.spark.scheduler.Task.run(Task.scala:88)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
```

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #9958 from tdas/SPARK-11979.
---
 .../spark/streaming/util/StateMap.scala       | 19 +++++++-----
 .../spark/streaming/StateMapSuite.scala       | 30 ++++++++++++-------
 .../streaming/rdd/TrackStateRDDSuite.scala    | 10 +++++++
 3 files changed, 42 insertions(+), 17 deletions(-)

diff --git a/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
index 34287c3e0090..3f139ad138c8 100644
--- a/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
+++ b/streaming/src/main/scala/org/apache/spark/streaming/util/StateMap.scala
@@ -59,7 +59,7 @@ private[streaming] object StateMap {
   def create[K: ClassTag, S: ClassTag](conf: SparkConf): StateMap[K, S] = {
     val deltaChainThreshold = conf.getInt("spark.streaming.sessionByKey.deltaChainThreshold",
       DELTA_CHAIN_LENGTH_THRESHOLD)
-    new OpenHashMapBasedStateMap[K, S](64, deltaChainThreshold)
+    new OpenHashMapBasedStateMap[K, S](deltaChainThreshold)
   }
 }
 
@@ -79,7 +79,7 @@ private[streaming] class EmptyStateMap[K: ClassTag, S: ClassTag] extends StateMa
 /** Implementation of StateMap based on Spark's [[org.apache.spark.util.collection.OpenHashMap]] */
 private[streaming] class OpenHashMapBasedStateMap[K: ClassTag, S: ClassTag](
     @transient @volatile var parentStateMap: StateMap[K, S],
-    initialCapacity: Int = 64,
+    initialCapacity: Int = DEFAULT_INITIAL_CAPACITY,
     deltaChainThreshold: Int = DELTA_CHAIN_LENGTH_THRESHOLD
   ) extends StateMap[K, S] { self =>
 
@@ -89,12 +89,14 @@ private[streaming] class OpenHashMapBasedStateMap[K: ClassTag, S: ClassTag](
     deltaChainThreshold = deltaChainThreshold)
 
   def this(deltaChainThreshold: Int) = this(
-    initialCapacity = 64, deltaChainThreshold = deltaChainThreshold)
+    initialCapacity = DEFAULT_INITIAL_CAPACITY, deltaChainThreshold = deltaChainThreshold)
 
   def this() = this(DELTA_CHAIN_LENGTH_THRESHOLD)
 
-  @transient @volatile private var deltaMap =
-    new OpenHashMap[K, StateInfo[S]](initialCapacity)
+  require(initialCapacity >= 1, "Invalid initial capacity")
+  require(deltaChainThreshold >= 1, "Invalid delta chain threshold")
+
+  @transient @volatile private var deltaMap = new OpenHashMap[K, StateInfo[S]](initialCapacity)
 
   /** Get the session data if it exists */
   override def get(key: K): Option[S] = {
@@ -284,9 +286,10 @@ private[streaming] class OpenHashMapBasedStateMap[K: ClassTag, S: ClassTag](
     // Read the data of the parent map. Keep reading records, until the limiter is reached
     // First read the approximate number of records to expect and allocate properly size
     // OpenHashMap
-    val parentSessionStoreSizeHint = inputStream.readInt()
+    val parentStateMapSizeHint = inputStream.readInt()
+    val newStateMapInitialCapacity = math.max(parentStateMapSizeHint, DEFAULT_INITIAL_CAPACITY)
     val newParentSessionStore = new OpenHashMapBasedStateMap[K, S](
-      initialCapacity = parentSessionStoreSizeHint, deltaChainThreshold)
+      initialCapacity = newStateMapInitialCapacity, deltaChainThreshold)
 
     // Read the records until the limit marking object has been reached
     var parentSessionLoopDone = false
@@ -338,4 +341,6 @@ private[streaming] object OpenHashMapBasedStateMap {
   class LimitMarker(val num: Int) extends Serializable
 
   val DELTA_CHAIN_LENGTH_THRESHOLD = 20
+
+  val DEFAULT_INITIAL_CAPACITY = 64
 }
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
index 48d3b41b66cb..c4a01eaea739 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/StateMapSuite.scala
@@ -122,23 +122,27 @@ class StateMapSuite extends SparkFunSuite {
 
   test("OpenHashMapBasedStateMap - serializing and deserializing") {
     val map1 = new OpenHashMapBasedStateMap[Int, Int]()
+    testSerialization(map1, "error deserializing and serialized empty map")
+
     map1.put(1, 100, 1)
     map1.put(2, 200, 2)
+    testSerialization(map1, "error deserializing and serialized map with data + no delta")
 
     val map2 = map1.copy()
+    // Do not test compaction
+    assert(map2.asInstanceOf[OpenHashMapBasedStateMap[_, _]].shouldCompact === false)
+    testSerialization(map2, "error deserializing and serialized map with 1 delta + no new data")
+
     map2.put(3, 300, 3)
     map2.put(4, 400, 4)
+    testSerialization(map2, "error deserializing and serialized map with 1 delta + new data")
 
     val map3 = map2.copy()
+    assert(map3.asInstanceOf[OpenHashMapBasedStateMap[_, _]].shouldCompact === false)
+    testSerialization(map3, "error deserializing and serialized map with 2 delta + no new data")
     map3.put(3, 600, 3)
     map3.remove(2)
-
-    // Do not test compaction
-    assert(map3.asInstanceOf[OpenHashMapBasedStateMap[_, _]].shouldCompact === false)
-
-    val deser_map3 = Utils.deserialize[StateMap[Int, Int]](
-      Utils.serialize(map3), Thread.currentThread().getContextClassLoader)
-    assertMap(deser_map3, map3, 1, "Deserialized map not same as original map")
+    testSerialization(map3, "error deserializing and serialized map with 2 delta + new data")
   }
 
   test("OpenHashMapBasedStateMap - serializing and deserializing with compaction") {
@@ -156,11 +160,9 @@ class StateMapSuite extends SparkFunSuite {
     assert(map.deltaChainLength > deltaChainThreshold)
     assert(map.shouldCompact === true)
 
-    val deser_map = Utils.deserialize[OpenHashMapBasedStateMap[Int, Int]](
-      Utils.serialize(map), Thread.currentThread().getContextClassLoader)
+    val deser_map = testSerialization(map, "Deserialized + compacted map not same as original map")
     assert(deser_map.deltaChainLength < deltaChainThreshold)
     assert(deser_map.shouldCompact === false)
-    assertMap(deser_map, map, 1, "Deserialized + compacted map not same as original map")
   }
 
   test("OpenHashMapBasedStateMap - all possible sequences of operations with copies ") {
@@ -265,6 +267,14 @@ class StateMapSuite extends SparkFunSuite {
     assertMap(stateMap, refMap.toMap, time, "Final state map does not match reference map")
   }
 
+  private def testSerialization[MapType <: StateMap[Int, Int]](
+    map: MapType, msg: String): MapType = {
+    val deserMap = Utils.deserialize[MapType](
+      Utils.serialize(map), Thread.currentThread().getContextClassLoader)
+    assertMap(deserMap, map, 1, msg)
+    deserMap
+  }
+
   // Assert whether all the data and operations on a state map matches that of a reference state map
   private def assertMap(
       mapToTest: StateMap[Int, Int],
diff --git a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
index 0feb3af1abb0..3b2d43f2ce58 100644
--- a/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
+++ b/streaming/src/test/scala/org/apache/spark/streaming/rdd/TrackStateRDDSuite.scala
@@ -332,6 +332,16 @@ class TrackStateRDDSuite extends SparkFunSuite with RDDCheckpointTester with Bef
       makeStateRDDWithLongLineageParenttateRDD, reliableCheckpoint = true, rddCollectFunc _)
   }
 
+  test("checkpointing empty state RDD") {
+    val emptyStateRDD = TrackStateRDD.createFromPairRDD[Int, Int, Int, Int](
+      sc.emptyRDD[(Int, Int)], new HashPartitioner(10), Time(0))
+    emptyStateRDD.checkpoint()
+    assert(emptyStateRDD.flatMap { _.stateMap.getAll() }.collect().isEmpty)
+    val cpRDD = sc.checkpointFile[TrackStateRDDRecord[Int, Int, Int]](
+      emptyStateRDD.getCheckpointFile.get)
+    assert(cpRDD.flatMap { _.stateMap.getAll() }.collect().isEmpty)
+  }
+
   /** Assert whether the `trackStateByKey` operation generates expected results */
   private def assertOperation[K: ClassTag, V: ClassTag, S: ClassTag, T: ClassTag](
       testStateRDD: TrackStateRDD[K, V, S, T],

From 2610e06124c7fc0b2b1cfb2e3050a35ab492fb71 Mon Sep 17 00:00:00 2001
From: gatorsmile <gatorsmile@gmail.com>
Date: Wed, 25 Nov 2015 01:02:36 -0800
Subject: [PATCH 889/896] [SPARK-11970][SQL] Adding JoinType into JoinWith and
 support Sample in Dataset API

Except inner join, maybe the other join types are also useful when users are using the joinWith function. Thus, added the joinType into the existing joinWith call in Dataset APIs.

Also providing another joinWith interface for the cartesian-join-like functionality.

Please provide your opinions. marmbrus rxin cloud-fan Thank you!

Author: gatorsmile <gatorsmile@gmail.com>

Closes #9921 from gatorsmile/joinWith.
---
 .../scala/org/apache/spark/sql/Dataset.scala  | 45 +++++++++++++++----
 .../org/apache/spark/sql/DatasetSuite.scala   | 36 ++++++++++++---
 2 files changed, 65 insertions(+), 16 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index dd84b8bc11e2..97eb5b969280 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -20,16 +20,16 @@ package org.apache.spark.sql
 import scala.collection.JavaConverters._
 
 import org.apache.spark.annotation.Experimental
-import org.apache.spark.rdd.RDD
 import org.apache.spark.api.java.function._
-
+import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.encoders._
 import org.apache.spark.sql.catalyst.expressions._
 import org.apache.spark.sql.catalyst.analysis.UnresolvedAlias
-import org.apache.spark.sql.catalyst.plans.Inner
+import org.apache.spark.sql.catalyst.plans.JoinType
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.{Queryable, QueryExecution}
 import org.apache.spark.sql.types.StructType
+import org.apache.spark.util.Utils
 
 /**
  * :: Experimental ::
@@ -83,7 +83,6 @@ class Dataset[T] private[sql](
 
   /**
    * Returns the schema of the encoded form of the objects in this [[Dataset]].
-   *
    * @since 1.6.0
    */
   def schema: StructType = resolvedTEncoder.schema
@@ -185,7 +184,6 @@ class Dataset[T] private[sql](
    *     .transform(featurize)
    *     .transform(...)
    * }}}
-   *
    * @since 1.6.0
    */
   def transform[U](t: Dataset[T] => Dataset[U]): Dataset[U] = t(this)
@@ -453,6 +451,21 @@ class Dataset[T] private[sql](
       c5: TypedColumn[T, U5]): Dataset[(U1, U2, U3, U4, U5)] =
     selectUntyped(c1, c2, c3, c4, c5).asInstanceOf[Dataset[(U1, U2, U3, U4, U5)]]
 
+  /**
+   * Returns a new [[Dataset]] by sampling a fraction of records.
+   * @since 1.6.0
+   */
+  def sample(withReplacement: Boolean, fraction: Double, seed: Long) : Dataset[T] =
+    withPlan(Sample(0.0, fraction, withReplacement, seed, _))
+
+  /**
+   * Returns a new [[Dataset]] by sampling a fraction of records, using a random seed.
+   * @since 1.6.0
+   */
+  def sample(withReplacement: Boolean, fraction: Double) : Dataset[T] = {
+    sample(withReplacement, fraction, Utils.random.nextLong)
+  }
+
   /* **************** *
    *  Set operations  *
    * **************** */
@@ -511,13 +524,17 @@ class Dataset[T] private[sql](
    * types as well as working with relational data where either side of the join has column
    * names in common.
    *
+   * @param other Right side of the join.
+   * @param condition Join expression.
+   * @param joinType One of: `inner`, `outer`, `left_outer`, `right_outer`, `leftsemi`.
    * @since 1.6.0
    */
-  def joinWith[U](other: Dataset[U], condition: Column): Dataset[(T, U)] = {
+  def joinWith[U](other: Dataset[U], condition: Column, joinType: String): Dataset[(T, U)] = {
     val left = this.logicalPlan
     val right = other.logicalPlan
 
-    val joined = sqlContext.executePlan(Join(left, right, Inner, Some(condition.expr)))
+    val joined = sqlContext.executePlan(Join(left, right, joinType =
+      JoinType(joinType), Some(condition.expr)))
     val leftOutput = joined.analyzed.output.take(left.output.length)
     val rightOutput = joined.analyzed.output.takeRight(right.output.length)
 
@@ -540,6 +557,18 @@ class Dataset[T] private[sql](
     }
   }
 
+  /**
+   * Using inner equi-join to join this [[Dataset]] returning a [[Tuple2]] for each pair
+   * where `condition` evaluates to true.
+   *
+   * @param other Right side of the join.
+   * @param condition Join expression.
+   * @since 1.6.0
+   */
+  def joinWith[U](other: Dataset[U], condition: Column): Dataset[(T, U)] = {
+    joinWith(other, condition, "inner")
+  }
+
   /* ************************** *
    *  Gather to Driver Actions  *
    * ************************** */
@@ -584,7 +613,6 @@ class Dataset[T] private[sql](
    *
    * Running take requires moving data into the application's driver process, and doing so with
    * a very large `n` can crash the driver process with OutOfMemoryError.
-   *
    * @since 1.6.0
    */
   def take(num: Int): Array[T] = withPlan(Limit(Literal(num), _)).collect()
@@ -594,7 +622,6 @@ class Dataset[T] private[sql](
    *
    * Running take requires moving data into the application's driver process, and doing so with
    * a very large `n` can crash the driver process with OutOfMemoryError.
-   *
    * @since 1.6.0
    */
   def takeAsList(num: Int): java.util.List[T] = java.util.Arrays.asList(take(num) : _*)
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
index c253fdbb8c99..7d539180ded9 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala
@@ -185,17 +185,23 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
     val ds2 = Seq(1, 2).toDS().as("b")
 
     checkAnswer(
-      ds1.joinWith(ds2, $"a.value" === $"b.value"),
+      ds1.joinWith(ds2, $"a.value" === $"b.value", "inner"),
       (1, 1), (2, 2))
   }
 
-  test("joinWith, expression condition") {
-    val ds1 = Seq(ClassData("a", 1), ClassData("b", 2)).toDS()
-    val ds2 = Seq(("a", 1), ("b", 2)).toDS()
+  test("joinWith, expression condition, outer join") {
+    val nullInteger = null.asInstanceOf[Integer]
+    val nullString = null.asInstanceOf[String]
+    val ds1 = Seq(ClassNullableData("a", 1),
+      ClassNullableData("c", 3)).toDS()
+    val ds2 = Seq(("a", new Integer(1)),
+      ("b", new Integer(2))).toDS()
 
     checkAnswer(
-      ds1.joinWith(ds2, $"_1" === $"a"),
-      (ClassData("a", 1), ("a", 1)), (ClassData("b", 2), ("b", 2)))
+      ds1.joinWith(ds2, $"_1" === $"a", "outer"),
+      (ClassNullableData("a", 1), ("a", new Integer(1))),
+      (ClassNullableData("c", 3), (nullString, nullInteger)),
+      (ClassNullableData(nullString, nullInteger), ("b", new Integer(2))))
   }
 
   test("joinWith tuple with primitive, expression") {
@@ -225,7 +231,6 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       ds1.joinWith(ds2, $"a._2" === $"b._2").as("ab").joinWith(ds3, $"ab._1._2" === $"c._2"),
       ((("a", 1), ("a", 1)), ("a", 1)),
       ((("b", 2), ("b", 2)), ("b", 2)))
-
   }
 
   test("groupBy function, keys") {
@@ -367,6 +372,22 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
       1 -> "a", 2 -> "bc", 3 -> "d")
   }
 
+  test("sample with replacement") {
+    val n = 100
+    val data = sparkContext.parallelize(1 to n, 2).toDS()
+    checkAnswer(
+      data.sample(withReplacement = true, 0.05, seed = 13),
+      5, 10, 52, 73)
+  }
+
+  test("sample without replacement") {
+    val n = 100
+    val data = sparkContext.parallelize(1 to n, 2).toDS()
+    checkAnswer(
+      data.sample(withReplacement = false, 0.05, seed = 13),
+      3, 17, 27, 58, 62)
+  }
+
   test("SPARK-11436: we should rebind right encoder when join 2 datasets") {
     val ds1 = Seq("1", "2").toDS().as("a")
     val ds2 = Seq(2, 3).toDS().as("b")
@@ -440,6 +461,7 @@ class DatasetSuite extends QueryTest with SharedSQLContext {
 
 
 case class ClassData(a: String, b: Int)
+case class ClassNullableData(a: String, b: Integer)
 
 /**
  * A class used to test serialization using encoders. This class throws exceptions when using

From a0f1a11837bfffb76582499d36fbaf21a1d628cb Mon Sep 17 00:00:00 2001
From: Reynold Xin <rxin@databricks.com>
Date: Wed, 25 Nov 2015 01:03:18 -0800
Subject: [PATCH 890/896] [SPARK-11981][SQL] Move implementations of methods
 back to DataFrame from Queryable

Also added show methods to Dataset.

Author: Reynold Xin <rxin@databricks.com>

Closes #9964 from rxin/SPARK-11981.
---
 .../org/apache/spark/sql/DataFrame.scala      | 35 ++++++++-
 .../scala/org/apache/spark/sql/Dataset.scala  | 77 ++++++++++++++++++-
 .../spark/sql/execution/Queryable.scala       | 32 ++------
 3 files changed, 111 insertions(+), 33 deletions(-)

diff --git a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
index 5eca1db9525e..d8319b9a97fc 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
@@ -37,7 +37,7 @@ import org.apache.spark.sql.catalyst.expressions.aggregate._
 import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
-import org.apache.spark.sql.execution.{EvaluatePython, FileRelation, LogicalRDD, QueryExecution, Queryable, SQLExecution}
+import org.apache.spark.sql.execution.{EvaluatePython, ExplainCommand, FileRelation, LogicalRDD, QueryExecution, Queryable, SQLExecution}
 import org.apache.spark.sql.execution.datasources.{CreateTableUsingAsSelect, LogicalRelation}
 import org.apache.spark.sql.execution.datasources.json.JacksonGenerator
 import org.apache.spark.sql.sources.HadoopFsRelation
@@ -112,8 +112,8 @@ private[sql] object DataFrame {
  */
 @Experimental
 class DataFrame private[sql](
-    @transient val sqlContext: SQLContext,
-    @DeveloperApi @transient val queryExecution: QueryExecution)
+    @transient override val sqlContext: SQLContext,
+    @DeveloperApi @transient override val queryExecution: QueryExecution)
   extends Queryable with Serializable {
 
   // Note for Spark contributors: if adding or updating any action in `DataFrame`, please make sure
@@ -282,6 +282,35 @@ class DataFrame private[sql](
    */
   def schema: StructType = queryExecution.analyzed.schema
 
+  /**
+   * Prints the schema to the console in a nice tree format.
+   * @group basic
+   * @since 1.3.0
+   */
+  // scalastyle:off println
+  override def printSchema(): Unit = println(schema.treeString)
+  // scalastyle:on println
+
+  /**
+   * Prints the plans (logical and physical) to the console for debugging purposes.
+   * @group basic
+   * @since 1.3.0
+   */
+  override def explain(extended: Boolean): Unit = {
+    val explain = ExplainCommand(queryExecution.logical, extended = extended)
+    sqlContext.executePlan(explain).executedPlan.executeCollect().foreach {
+      // scalastyle:off println
+      r => println(r.getString(0))
+      // scalastyle:on println
+    }
+  }
+
+  /**
+   * Prints the physical plan to the console for debugging purposes.
+   * @since 1.3.0
+   */
+  override def explain(): Unit = explain(extended = false)
+
   /**
    * Returns all column names and their data types as an array.
    * @group basic
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
index 97eb5b969280..da4600133290 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala
@@ -61,8 +61,8 @@ import org.apache.spark.util.Utils
  */
 @Experimental
 class Dataset[T] private[sql](
-    @transient val sqlContext: SQLContext,
-    @transient val queryExecution: QueryExecution,
+    @transient override val sqlContext: SQLContext,
+    @transient override val queryExecution: QueryExecution,
     tEncoder: Encoder[T]) extends Queryable with Serializable {
 
   /**
@@ -85,7 +85,25 @@ class Dataset[T] private[sql](
    * Returns the schema of the encoded form of the objects in this [[Dataset]].
    * @since 1.6.0
    */
-  def schema: StructType = resolvedTEncoder.schema
+  override def schema: StructType = resolvedTEncoder.schema
+
+  /**
+   * Prints the schema of the underlying [[DataFrame]] to the console in a nice tree format.
+   * @since 1.6.0
+   */
+  override def printSchema(): Unit = toDF().printSchema()
+
+  /**
+   * Prints the plans (logical and physical) to the console for debugging purposes.
+   * @since 1.6.0
+   */
+  override def explain(extended: Boolean): Unit = toDF().explain(extended)
+
+  /**
+   * Prints the physical plan to the console for debugging purposes.
+   * @since 1.6.0
+   */
+  override def explain(): Unit = toDF().explain()
 
   /* ************* *
    *  Conversions  *
@@ -152,6 +170,59 @@ class Dataset[T] private[sql](
    */
   def count(): Long = toDF().count()
 
+  /**
+   * Displays the content of this [[Dataset]] in a tabular form. Strings more than 20 characters
+   * will be truncated, and all cells will be aligned right. For example:
+   * {{{
+   *   year  month AVG('Adj Close) MAX('Adj Close)
+   *   1980  12    0.503218        0.595103
+   *   1981  01    0.523289        0.570307
+   *   1982  02    0.436504        0.475256
+   *   1983  03    0.410516        0.442194
+   *   1984  04    0.450090        0.483521
+   * }}}
+   * @param numRows Number of rows to show
+   *
+   * @since 1.6.0
+   */
+  def show(numRows: Int): Unit = show(numRows, truncate = true)
+
+  /**
+   * Displays the top 20 rows of [[DataFrame]] in a tabular form. Strings more than 20 characters
+   * will be truncated, and all cells will be aligned right.
+   *
+   * @since 1.6.0
+   */
+  def show(): Unit = show(20)
+
+  /**
+   * Displays the top 20 rows of [[DataFrame]] in a tabular form.
+   *
+   * @param truncate Whether truncate long strings. If true, strings more than 20 characters will
+   *              be truncated and all cells will be aligned right
+   *
+   * @since 1.6.0
+   */
+  def show(truncate: Boolean): Unit = show(20, truncate)
+
+  /**
+   * Displays the [[DataFrame]] in a tabular form. For example:
+   * {{{
+   *   year  month AVG('Adj Close) MAX('Adj Close)
+   *   1980  12    0.503218        0.595103
+   *   1981  01    0.523289        0.570307
+   *   1982  02    0.436504        0.475256
+   *   1983  03    0.410516        0.442194
+   *   1984  04    0.450090        0.483521
+   * }}}
+   * @param numRows Number of rows to show
+   * @param truncate Whether truncate long strings. If true, strings more than 20 characters will
+   *              be truncated and all cells will be aligned right
+   *
+   * @since 1.6.0
+   */
+  def show(numRows: Int, truncate: Boolean): Unit = toDF().show(numRows, truncate)
+
   /**
     * Returns a new [[Dataset]] that has exactly `numPartitions` partitions.
     * @since 1.6.0
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
index 321e2c783537..f2f5997d1b7c 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/Queryable.scala
@@ -17,11 +17,11 @@
 
 package org.apache.spark.sql.execution
 
+import scala.util.control.NonFatal
+
 import org.apache.spark.sql.SQLContext
 import org.apache.spark.sql.types.StructType
 
-import scala.util.control.NonFatal
-
 /** A trait that holds shared code between DataFrames and Datasets. */
 private[sql] trait Queryable {
   def schema: StructType
@@ -37,31 +37,9 @@ private[sql] trait Queryable {
     }
   }
 
-  /**
-   * Prints the schema to the console in a nice tree format.
-   * @group basic
-   * @since 1.3.0
-   */
-  // scalastyle:off println
-  def printSchema(): Unit = println(schema.treeString)
-  // scalastyle:on println
+  def printSchema(): Unit
 
-  /**
-   * Prints the plans (logical and physical) to the console for debugging purposes.
-   * @since 1.3.0
-   */
-  def explain(extended: Boolean): Unit = {
-    val explain = ExplainCommand(queryExecution.logical, extended = extended)
-    sqlContext.executePlan(explain).executedPlan.executeCollect().foreach {
-      // scalastyle:off println
-      r => println(r.getString(0))
-      // scalastyle:on println
-    }
-  }
+  def explain(extended: Boolean): Unit
 
-  /**
-   * Only prints the physical plan to the console for debugging purposes.
-   * @since 1.3.0
-   */
-  def explain(): Unit = explain(extended = false)
+  def explain(): Unit
 }

From 63850026576b3ea7783f9d4b975171dc3cff6e4c Mon Sep 17 00:00:00 2001
From: Ashwin Swaroop <Ashwin Swaroop>
Date: Wed, 25 Nov 2015 13:41:14 +0000
Subject: [PATCH 891/896] [SPARK-11686][CORE] Issue WARN when dynamic
 allocation is disabled due to spark.dynamicAllocation.enabled and
 spark.executor.instances both set

Changed the log type to a 'warning' instead of 'info' as required.

Author: Ashwin Swaroop <Ashwin Swaroop>

Closes #9926 from ashwinswaroop/master.
---
 core/src/main/scala/org/apache/spark/SparkContext.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/SparkContext.scala b/core/src/main/scala/org/apache/spark/SparkContext.scala
index e19ba113702c..2c10779f2b89 100644
--- a/core/src/main/scala/org/apache/spark/SparkContext.scala
+++ b/core/src/main/scala/org/apache/spark/SparkContext.scala
@@ -556,7 +556,7 @@ class SparkContext(config: SparkConf) extends Logging with ExecutorAllocationCli
     // Optionally scale number of executors dynamically based on workload. Exposed for testing.
     val dynamicAllocationEnabled = Utils.isDynamicAllocationEnabled(_conf)
     if (!dynamicAllocationEnabled && _conf.getBoolean("spark.dynamicAllocation.enabled", false)) {
-      logInfo("Dynamic Allocation and num executors both set, thus dynamic allocation disabled.")
+      logWarning("Dynamic Allocation and num executors both set, thus dynamic allocation disabled.")
     }
 
     _executorAllocationManager =

From b9b6fbe89b6d1a890faa02c1a53bb670a6255362 Mon Sep 17 00:00:00 2001
From: Jeff Zhang <zjffdu@apache.org>
Date: Wed, 25 Nov 2015 13:49:58 +0000
Subject: [PATCH 892/896] =?UTF-8?q?[SPARK-11860][PYSAPRK][DOCUMENTATION]?=
 =?UTF-8?q?=20Invalid=20argument=20specification=20=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…for registerFunction [Python]

Straightforward change on the python doc

Author: Jeff Zhang <zjffdu@apache.org>

Closes #9901 from zjffdu/SPARK-11860.
---
 python/pyspark/sql/context.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/python/pyspark/sql/context.py b/python/pyspark/sql/context.py
index 5a85ac31025e..a49c1b58d018 100644
--- a/python/pyspark/sql/context.py
+++ b/python/pyspark/sql/context.py
@@ -195,14 +195,15 @@ def range(self, start, end=None, step=1, numPartitions=None):
     @ignore_unicode_prefix
     @since(1.2)
     def registerFunction(self, name, f, returnType=StringType()):
-        """Registers a lambda function as a UDF so it can be used in SQL statements.
+        """Registers a python function (including lambda function) as a UDF
+        so it can be used in SQL statements.
 
         In addition to a name and the function itself, the return type can be optionally specified.
         When the return type is not given it default to a string and conversion will automatically
         be done.  For any other return type, the produced object must match the specified type.
 
         :param name: name of the UDF
-        :param samplingRatio: lambda function
+        :param f: python function
         :param returnType: a :class:`DataType` object
 
         >>> sqlContext.registerFunction("stringLengthString", lambda x: len(x))

From 0a5aef753e70e93d7e56054f354a52e4d4e18932 Mon Sep 17 00:00:00 2001
From: Mark Hamstra <markhamstra@gmail.com>
Date: Wed, 25 Nov 2015 09:34:34 -0600
Subject: [PATCH 893/896] [SPARK-10666][SPARK-6880][CORE] Use properties from
 ActiveJob associated with a Stage

This issue was addressed in https://github.com/apache/spark/pull/5494, but the fix in that PR, while safe in the sense that it will prevent the SparkContext from shutting down, misses the actual bug.  The intent of `submitMissingTasks` should be understood as "submit the Tasks that are missing for the Stage, and run them as part of the ActiveJob identified by jobId".  Because of a long-standing bug, the `jobId` parameter was never being used.  Instead, we were trying to use the jobId with which the Stage was created -- which may no longer exist as an ActiveJob, hence the crash reported in SPARK-6880.

The correct fix is to use the ActiveJob specified by the supplied jobId parameter, which is guaranteed to exist at the call sites of submitMissingTasks.

This fix should be applied to all maintenance branches, since it has existed since 1.0.

kayousterhout pankajarora12

Author: Mark Hamstra <markhamstra@gmail.com>
Author: Imran Rashid <irashid@cloudera.com>

Closes #6291 from markhamstra/SPARK-6880.
---
 .../apache/spark/scheduler/DAGScheduler.scala |   6 +-
 .../spark/scheduler/DAGSchedulerSuite.scala   | 107 +++++++++++++++++-
 2 files changed, 109 insertions(+), 4 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 77a184dfe4be..e01a9609b9a0 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -946,7 +946,9 @@ class DAGScheduler(
       stage.resetInternalAccumulators()
     }
 
-    val properties = jobIdToActiveJob.get(stage.firstJobId).map(_.properties).orNull
+    // Use the scheduling pool, job group, description, etc. from an ActiveJob associated
+    // with this Stage
+    val properties = jobIdToActiveJob(jobId).properties
 
     runningStages += stage
     // SparkListenerStageSubmitted should be posted before testing whether tasks are
@@ -1047,7 +1049,7 @@ class DAGScheduler(
       stage.pendingPartitions ++= tasks.map(_.partitionId)
       logDebug("New pending partitions: " + stage.pendingPartitions)
       taskScheduler.submitTasks(new TaskSet(
-        tasks.toArray, stage.id, stage.latestInfo.attemptId, stage.firstJobId, properties))
+        tasks.toArray, stage.id, stage.latestInfo.attemptId, jobId, properties))
       stage.latestInfo.submissionTime = Some(clock.getTimeMillis())
     } else {
       // Because we posted SparkListenerStageSubmitted earlier, we should mark
diff --git a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
index 4d6b25455226..653d41fc053c 100644
--- a/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
+++ b/core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
@@ -17,6 +17,8 @@
 
 package org.apache.spark.scheduler
 
+import java.util.Properties
+
 import scala.collection.mutable.{ArrayBuffer, HashSet, HashMap, Map}
 import scala.language.reflectiveCalls
 import scala.util.control.NonFatal
@@ -262,9 +264,10 @@ class DAGSchedulerSuite
       rdd: RDD[_],
       partitions: Array[Int],
       func: (TaskContext, Iterator[_]) => _ = jobComputeFunc,
-      listener: JobListener = jobListener): Int = {
+      listener: JobListener = jobListener,
+      properties: Properties = null): Int = {
     val jobId = scheduler.nextJobId.getAndIncrement()
-    runEvent(JobSubmitted(jobId, rdd, func, partitions, CallSite("", ""), listener))
+    runEvent(JobSubmitted(jobId, rdd, func, partitions, CallSite("", ""), listener, properties))
     jobId
   }
 
@@ -1322,6 +1325,106 @@ class DAGSchedulerSuite
     assertDataStructuresEmpty()
   }
 
+  def checkJobPropertiesAndPriority(taskSet: TaskSet, expected: String, priority: Int): Unit = {
+    assert(taskSet.properties != null)
+    assert(taskSet.properties.getProperty("testProperty") === expected)
+    assert(taskSet.priority === priority)
+  }
+
+  def launchJobsThatShareStageAndCancelFirst(): ShuffleDependency[Int, Int, Nothing] = {
+    val baseRdd = new MyRDD(sc, 1, Nil)
+    val shuffleDep1 = new ShuffleDependency(baseRdd, new HashPartitioner(1))
+    val intermediateRdd = new MyRDD(sc, 1, List(shuffleDep1))
+    val shuffleDep2 = new ShuffleDependency(intermediateRdd, new HashPartitioner(1))
+    val finalRdd1 = new MyRDD(sc, 1, List(shuffleDep2))
+    val finalRdd2 = new MyRDD(sc, 1, List(shuffleDep2))
+    val job1Properties = new Properties()
+    val job2Properties = new Properties()
+    job1Properties.setProperty("testProperty", "job1")
+    job2Properties.setProperty("testProperty", "job2")
+
+    // Run jobs 1 & 2, both referencing the same stage, then cancel job1.
+    // Note that we have to submit job2 before we cancel job1 to have them actually share
+    // *Stages*, and not just shuffle dependencies, due to skipped stages (at least until
+    // we address SPARK-10193.)
+    val jobId1 = submit(finalRdd1, Array(0), properties = job1Properties)
+    val jobId2 = submit(finalRdd2, Array(0), properties = job2Properties)
+    assert(scheduler.activeJobs.nonEmpty)
+    val testProperty1 = scheduler.jobIdToActiveJob(jobId1).properties.getProperty("testProperty")
+
+    // remove job1 as an ActiveJob
+    cancel(jobId1)
+
+    // job2 should still be running
+    assert(scheduler.activeJobs.nonEmpty)
+    val testProperty2 = scheduler.jobIdToActiveJob(jobId2).properties.getProperty("testProperty")
+    assert(testProperty1 != testProperty2)
+    // NB: This next assert isn't necessarily the "desired" behavior; it's just to document
+    // the current behavior.  We've already submitted the TaskSet for stage 0 based on job1, but
+    // even though we have cancelled that job and are now running it because of job2, we haven't
+    // updated the TaskSet's properties.  Changing the properties to "job2" is likely the more
+    // correct behavior.
+    val job1Id = 0  // TaskSet priority for Stages run with "job1" as the ActiveJob
+    checkJobPropertiesAndPriority(taskSets(0), "job1", job1Id)
+    complete(taskSets(0), Seq((Success, makeMapStatus("hostA", 1))))
+
+    shuffleDep1
+  }
+
+  /**
+   * Makes sure that tasks for a stage used by multiple jobs are submitted with the properties of a
+   * later, active job if they were previously run under a job that is no longer active
+   */
+  test("stage used by two jobs, the first no longer active (SPARK-6880)") {
+    launchJobsThatShareStageAndCancelFirst()
+
+    // The next check is the key for SPARK-6880.  For the stage which was shared by both job1 and
+    // job2 but never had any tasks submitted for job1, the properties of job2 are now used to run
+    // the stage.
+    checkJobPropertiesAndPriority(taskSets(1), "job2", 1)
+
+    complete(taskSets(1), Seq((Success, makeMapStatus("hostA", 1))))
+    assert(taskSets(2).properties != null)
+    complete(taskSets(2), Seq((Success, 42)))
+    assert(results === Map(0 -> 42))
+    assert(scheduler.activeJobs.isEmpty)
+
+    assertDataStructuresEmpty()
+  }
+
+  /**
+   * Makes sure that tasks for a stage used by multiple jobs are submitted with the properties of a
+   * later, active job if they were previously run under a job that is no longer active, even when
+   * there are fetch failures
+   */
+  test("stage used by two jobs, some fetch failures, and the first job no longer active " +
+    "(SPARK-6880)") {
+    val shuffleDep1 = launchJobsThatShareStageAndCancelFirst()
+    val job2Id = 1  // TaskSet priority for Stages run with "job2" as the ActiveJob
+
+    // lets say there is a fetch failure in this task set, which makes us go back and
+    // run stage 0, attempt 1
+    complete(taskSets(1), Seq(
+      (FetchFailed(makeBlockManagerId("hostA"), shuffleDep1.shuffleId, 0, 0, "ignored"), null)))
+    scheduler.resubmitFailedStages()
+
+    // stage 0, attempt 1 should have the properties of job2
+    assert(taskSets(2).stageId === 0)
+    assert(taskSets(2).stageAttemptId === 1)
+    checkJobPropertiesAndPriority(taskSets(2), "job2", job2Id)
+
+    // run the rest of the stages normally, checking that they have the correct properties
+    complete(taskSets(2), Seq((Success, makeMapStatus("hostA", 1))))
+    checkJobPropertiesAndPriority(taskSets(3), "job2", job2Id)
+    complete(taskSets(3), Seq((Success, makeMapStatus("hostA", 1))))
+    checkJobPropertiesAndPriority(taskSets(4), "job2", job2Id)
+    complete(taskSets(4), Seq((Success, 42)))
+    assert(results === Map(0 -> 42))
+    assert(scheduler.activeJobs.isEmpty)
+
+    assertDataStructuresEmpty()
+  }
+
   test("run trivial shuffle with out-of-band failure and retry") {
     val shuffleMapRdd = new MyRDD(sc, 2, Nil)
     val shuffleDep = new ShuffleDependency(shuffleMapRdd, new HashPartitioner(2))

From c1f85fc71e71e07534b89c84677d977bb20994f8 Mon Sep 17 00:00:00 2001
From: Marcelo Vanzin <vanzin@cloudera.com>
Date: Wed, 25 Nov 2015 09:47:20 -0800
Subject: [PATCH 894/896] [SPARK-11956][CORE] Fix a few bugs in network
 lib-based file transfer.

- NettyRpcEnv::openStream() now correctly propagates errors to
  the read side of the pipe.
- NettyStreamManager now throws if the file being transferred does
  not exist.
- The network library now correctly handles zero-sized streams.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #9941 from vanzin/SPARK-11956.
---
 .../apache/spark/rpc/netty/NettyRpcEnv.scala  | 19 +++++++++----
 .../spark/rpc/netty/NettyStreamManager.scala  |  2 +-
 .../org/apache/spark/rpc/RpcEnvSuite.scala    | 27 +++++++++++++-----
 .../client/TransportResponseHandler.java      | 28 ++++++++++++-------
 .../org/apache/spark/network/StreamSuite.java | 23 ++++++++++++++-
 5 files changed, 75 insertions(+), 24 deletions(-)

diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
index 68701f609f77..c8fa870f50e6 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcEnv.scala
@@ -27,7 +27,7 @@ import javax.annotation.Nullable
 
 import scala.concurrent.{Future, Promise}
 import scala.reflect.ClassTag
-import scala.util.{DynamicVariable, Failure, Success}
+import scala.util.{DynamicVariable, Failure, Success, Try}
 import scala.util.control.NonFatal
 
 import org.apache.spark.{Logging, SecurityManager, SparkConf}
@@ -368,13 +368,22 @@ private[netty] class NettyRpcEnv(
 
     @volatile private var error: Throwable = _
 
-    def setError(e: Throwable): Unit = error = e
+    def setError(e: Throwable): Unit = {
+      error = e
+      source.close()
+    }
 
     override def read(dst: ByteBuffer): Int = {
-      if (error != null) {
-        throw error
+      val result = if (error == null) {
+        Try(source.read(dst))
+      } else {
+        Failure(error)
+      }
+
+      result match {
+        case Success(bytesRead) => bytesRead
+        case Failure(error) => throw error
       }
-      source.read(dst)
     }
 
     override def close(): Unit = source.close()
diff --git a/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala b/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala
index eb1d2604fb23..a2768b4252dc 100644
--- a/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala
+++ b/core/src/main/scala/org/apache/spark/rpc/netty/NettyStreamManager.scala
@@ -44,7 +44,7 @@ private[netty] class NettyStreamManager(rpcEnv: NettyRpcEnv)
       case _ => throw new IllegalArgumentException(s"Invalid file type: $ftype")
     }
 
-    require(file != null, s"File not found: $streamId")
+    require(file != null && file.isFile(), s"File not found: $streamId")
     new FileSegmentManagedBuffer(rpcEnv.transportConf, file, 0, file.length())
   }
 
diff --git a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
index 2b664c6313ef..6cc958a5f6bc 100644
--- a/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
+++ b/core/src/test/scala/org/apache/spark/rpc/RpcEnvSuite.scala
@@ -729,23 +729,36 @@ abstract class RpcEnvSuite extends SparkFunSuite with BeforeAndAfterAll {
     val tempDir = Utils.createTempDir()
     val file = new File(tempDir, "file")
     Files.write(UUID.randomUUID().toString(), file, UTF_8)
+    val empty = new File(tempDir, "empty")
+    Files.write("", empty, UTF_8);
     val jar = new File(tempDir, "jar")
     Files.write(UUID.randomUUID().toString(), jar, UTF_8)
 
     val fileUri = env.fileServer.addFile(file)
+    val emptyUri = env.fileServer.addFile(empty)
     val jarUri = env.fileServer.addJar(jar)
 
     val destDir = Utils.createTempDir()
-    val destFile = new File(destDir, file.getName())
-    val destJar = new File(destDir, jar.getName())
-
     val sm = new SecurityManager(conf)
     val hc = SparkHadoopUtil.get.conf
-    Utils.fetchFile(fileUri, destDir, conf, sm, hc, 0L, false)
-    Utils.fetchFile(jarUri, destDir, conf, sm, hc, 0L, false)
 
-    assert(Files.equal(file, destFile))
-    assert(Files.equal(jar, destJar))
+    val files = Seq(
+      (file, fileUri),
+      (empty, emptyUri),
+      (jar, jarUri))
+    files.foreach { case (f, uri) =>
+      val destFile = new File(destDir, f.getName())
+      Utils.fetchFile(uri, destDir, conf, sm, hc, 0L, false)
+      assert(Files.equal(f, destFile))
+    }
+
+    // Try to download files that do not exist.
+    Seq("files", "jars").foreach { root =>
+      intercept[Exception] {
+        val uri = env.address.toSparkURL + s"/$root/doesNotExist"
+        Utils.fetchFile(uri, destDir, conf, sm, hc, 0L, false)
+      }
+    }
   }
 
 }
diff --git a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
index be181e066082..4c15045363b8 100644
--- a/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
+++ b/network/common/src/main/java/org/apache/spark/network/client/TransportResponseHandler.java
@@ -185,16 +185,24 @@ public void handle(ResponseMessage message) {
       StreamResponse resp = (StreamResponse) message;
       StreamCallback callback = streamCallbacks.poll();
       if (callback != null) {
-        StreamInterceptor interceptor = new StreamInterceptor(this, resp.streamId, resp.byteCount,
-          callback);
-        try {
-          TransportFrameDecoder frameDecoder = (TransportFrameDecoder)
-            channel.pipeline().get(TransportFrameDecoder.HANDLER_NAME);
-          frameDecoder.setInterceptor(interceptor);
-          streamActive = true;
-        } catch (Exception e) {
-          logger.error("Error installing stream handler.", e);
-          deactivateStream();
+        if (resp.byteCount > 0) {
+          StreamInterceptor interceptor = new StreamInterceptor(this, resp.streamId, resp.byteCount,
+            callback);
+          try {
+            TransportFrameDecoder frameDecoder = (TransportFrameDecoder)
+              channel.pipeline().get(TransportFrameDecoder.HANDLER_NAME);
+            frameDecoder.setInterceptor(interceptor);
+            streamActive = true;
+          } catch (Exception e) {
+            logger.error("Error installing stream handler.", e);
+            deactivateStream();
+          }
+        } else {
+          try {
+            callback.onComplete(resp.streamId);
+          } catch (Exception e) {
+            logger.warn("Error in stream handler onComplete().", e);
+          }
         }
       } else {
         logger.error("Could not find callback for StreamResponse.");
diff --git a/network/common/src/test/java/org/apache/spark/network/StreamSuite.java b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
index 00158fd08162..538f3efe8d6f 100644
--- a/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
+++ b/network/common/src/test/java/org/apache/spark/network/StreamSuite.java
@@ -51,13 +51,14 @@
 import org.apache.spark.network.util.TransportConf;
 
 public class StreamSuite {
-  private static final String[] STREAMS = { "largeBuffer", "smallBuffer", "file" };
+  private static final String[] STREAMS = { "largeBuffer", "smallBuffer", "emptyBuffer", "file" };
 
   private static TransportServer server;
   private static TransportClientFactory clientFactory;
   private static File testFile;
   private static File tempDir;
 
+  private static ByteBuffer emptyBuffer;
   private static ByteBuffer smallBuffer;
   private static ByteBuffer largeBuffer;
 
@@ -73,6 +74,7 @@ private static ByteBuffer createBuffer(int bufSize) {
   @BeforeClass
   public static void setUp() throws Exception {
     tempDir = Files.createTempDir();
+    emptyBuffer = createBuffer(0);
     smallBuffer = createBuffer(100);
     largeBuffer = createBuffer(100000);
 
@@ -103,6 +105,8 @@ public ManagedBuffer openStream(String streamId) {
             return new NioManagedBuffer(largeBuffer);
           case "smallBuffer":
             return new NioManagedBuffer(smallBuffer);
+          case "emptyBuffer":
+            return new NioManagedBuffer(emptyBuffer);
           case "file":
             return new FileSegmentManagedBuffer(conf, testFile, 0, testFile.length());
           default:
@@ -138,6 +142,18 @@ public static void tearDown() {
     }
   }
 
+  @Test
+  public void testZeroLengthStream() throws Throwable {
+    TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
+    try {
+      StreamTask task = new StreamTask(client, "emptyBuffer", TimeUnit.SECONDS.toMillis(5));
+      task.run();
+      task.check();
+    } finally {
+      client.close();
+    }
+  }
+
   @Test
   public void testSingleStream() throws Throwable {
     TransportClient client = clientFactory.createClient(TestUtils.getLocalHost(), server.getPort());
@@ -226,6 +242,11 @@ public void run() {
             outFile = File.createTempFile("data", ".tmp", tempDir);
             out = new FileOutputStream(outFile);
             break;
+          case "emptyBuffer":
+            baos = new ByteArrayOutputStream();
+            out = baos;
+            srcBuffer = emptyBuffer;
+            break;
           default:
             throw new IllegalArgumentException(streamId);
         }

From faabdfa2bd416ae514961535f1953e8e9e8b1f3f Mon Sep 17 00:00:00 2001
From: felixcheung <felixcheung_m@hotmail.com>
Date: Wed, 25 Nov 2015 10:36:35 -0800
Subject: [PATCH 895/896] [SPARK-11984][SQL][PYTHON] Fix typos in doc for pivot
 for scala and python

Author: felixcheung <felixcheung_m@hotmail.com>

Closes #9967 from felixcheung/pypivotdoc.
---
 python/pyspark/sql/group.py                                 | 6 +++---
 .../src/main/scala/org/apache/spark/sql/GroupedData.scala   | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/python/pyspark/sql/group.py b/python/pyspark/sql/group.py
index d8ed7eb2dda6..1911588309af 100644
--- a/python/pyspark/sql/group.py
+++ b/python/pyspark/sql/group.py
@@ -169,11 +169,11 @@ def sum(self, *cols):
 
     @since(1.6)
     def pivot(self, pivot_col, values=None):
-        """Pivots a column of the current DataFrame and preform the specified aggregation.
+        """Pivots a column of the current DataFrame and perform the specified aggregation.
 
         :param pivot_col: Column to pivot
-        :param values: Optional list of values of pivotColumn that will be translated to columns in
-            the output data frame. If values are not provided the method with do an immediate call
+        :param values: Optional list of values of pivot column that will be translated to columns in
+            the output DataFrame. If values are not provided the method will do an immediate call
             to .distinct() on the pivot column.
 
         >>> df4.groupBy("year").pivot("course", ["dotNET", "Java"]).sum("earnings").collect()
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
index abd531c4ba54..13341a88a6b7 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
@@ -282,7 +282,7 @@ class GroupedData protected[sql](
   }
 
   /**
-   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * Pivots a column of the current [[DataFrame]] and perform the specified aggregation.
    * There are two versions of pivot function: one that requires the caller to specify the list
    * of distinct values to pivot on, and one that does not. The latter is more concise but less
    * efficient, because Spark needs to first compute the list of distinct values internally.
@@ -321,7 +321,7 @@ class GroupedData protected[sql](
   }
 
   /**
-   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * Pivots a column of the current [[DataFrame]] and perform the specified aggregation.
    * There are two versions of pivot function: one that requires the caller to specify the list
    * of distinct values to pivot on, and one that does not. The latter is more concise but less
    * efficient, because Spark needs to first compute the list of distinct values internally.
@@ -353,7 +353,7 @@ class GroupedData protected[sql](
   }
 
   /**
-   * Pivots a column of the current [[DataFrame]] and preform the specified aggregation.
+   * Pivots a column of the current [[DataFrame]] and perform the specified aggregation.
    * There are two versions of pivot function: one that requires the caller to specify the list
    * of distinct values to pivot on, and one that does not. The latter is more concise but less
    * efficient, because Spark needs to first compute the list of distinct values internally.

From 6b781576a15d8d5c5fbed8bef1c5bda95b3d44ac Mon Sep 17 00:00:00 2001
From: Zhongshuai Pei <peizhongshuai@huawei.com>
Date: Wed, 25 Nov 2015 10:37:34 -0800
Subject: [PATCH 896/896] [SPARK-11974][CORE] Not all the temp dirs had been
 deleted when the JVM exits

deleting the temp dir like that

```

scala> import scala.collection.mutable
import scala.collection.mutable

scala> val a = mutable.Set(1,2,3,4,7,0,8,98,9)
a: scala.collection.mutable.Set[Int] = Set(0, 9, 1, 2, 3, 7, 4, 8, 98)

scala> a.foreach(x => {a.remove(x) })

scala> a.foreach(println(_))
98
```

You may not modify a collection while traversing or iterating over it.This can not delete all element of the collection

Author: Zhongshuai Pei <peizhongshuai@huawei.com>

Closes #9951 from DoingDone9/Bug_RemainDir.
---
 .../scala/org/apache/spark/util/ShutdownHookManager.scala     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/core/src/main/scala/org/apache/spark/util/ShutdownHookManager.scala b/core/src/main/scala/org/apache/spark/util/ShutdownHookManager.scala
index db4a8b304ec3..4012dca3ecdf 100644
--- a/core/src/main/scala/org/apache/spark/util/ShutdownHookManager.scala
+++ b/core/src/main/scala/org/apache/spark/util/ShutdownHookManager.scala
@@ -57,7 +57,9 @@ private[spark] object ShutdownHookManager extends Logging {
   // Add a shutdown hook to delete the temp dirs when the JVM exits
   addShutdownHook(TEMP_DIR_SHUTDOWN_PRIORITY) { () =>
     logInfo("Shutdown hook called")
-    shutdownDeletePaths.foreach { dirPath =>
+    // we need to materialize the paths to delete because deleteRecursively removes items from
+    // shutdownDeletePaths as we are traversing through it.
+    shutdownDeletePaths.toArray.foreach { dirPath =>
       try {
         logInfo("Deleting directory " + dirPath)
         Utils.deleteRecursively(new File(dirPath))